From 03eb4c33140da16e02c4f47e53c0421681bde8ce Mon Sep 17 00:00:00 2001 From: Souptick Joarder Date: Sat, 21 Apr 2018 01:24:24 +0530 Subject: usb: mon: Change return type to vm_fault_t Use new return type vm_fault_t for the fault handler in struct vm_operations_struct. For now, this is just documenting that the function returns a VM_FAULT value rather than an errno. Once all instances are converted, vm_fault_t will become a distinct type. Reference id -> 1c8f422059ae ("mm: change return type to vm_fault_t") Signed-off-by: Souptick Joarder Reviewed-by: Matthew Wilcox Signed-off-by: Greg Kroah-Hartman --- drivers/usb/mon/mon_bin.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers/usb') diff --git a/drivers/usb/mon/mon_bin.c b/drivers/usb/mon/mon_bin.c index 2761fad..34e866ad 100644 --- a/drivers/usb/mon/mon_bin.c +++ b/drivers/usb/mon/mon_bin.c @@ -1227,7 +1227,7 @@ static void mon_bin_vma_close(struct vm_area_struct *vma) /* * Map ring pages to user space. */ -static int mon_bin_vma_fault(struct vm_fault *vmf) +static vm_fault_t mon_bin_vma_fault(struct vm_fault *vmf) { struct mon_reader_bin *rp = vmf->vma->vm_private_data; unsigned long offset, chunk_idx; -- cgit v1.1 From 548f4726a10568c208a7a9d676d66470e9e99aa3 Mon Sep 17 00:00:00 2001 From: Wei Yongjun Date: Thu, 29 Mar 2018 02:14:11 +0000 Subject: usb: roles: Fix potential NULL dereference in intel_xhci_usb_probe() platform_get_resource() may fail and return NULL, so we should better check it's return value to avoid a NULL pointer dereference a bit later in the code. This is detected by Coccinelle semantic patch. @@ expression pdev, res, n, t, e, e1, e2; @@ res = platform_get_resource(pdev, t, n); + if (!res) + return -EINVAL; ... when != res == NULL e = devm_ioremap_nocache(e1, res->start, e2); Signed-off-by: Wei Yongjun Signed-off-by: Greg Kroah-Hartman --- drivers/usb/roles/intel-xhci-usb-role-switch.c | 2 ++ 1 file changed, 2 insertions(+) (limited to 'drivers/usb') diff --git a/drivers/usb/roles/intel-xhci-usb-role-switch.c b/drivers/usb/roles/intel-xhci-usb-role-switch.c index de72eed..2810212 100644 --- a/drivers/usb/roles/intel-xhci-usb-role-switch.c +++ b/drivers/usb/roles/intel-xhci-usb-role-switch.c @@ -144,6 +144,8 @@ static int intel_xhci_usb_probe(struct platform_device *pdev) return -ENOMEM; res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!res) + return -EINVAL; data->base = devm_ioremap_nocache(dev, res->start, resource_size(res)); if (!data->base) return -ENOMEM; -- cgit v1.1 From 2a3dae10d51d262514498fe710c963da946ce6e2 Mon Sep 17 00:00:00 2001 From: Jia-Ju Bai Date: Tue, 10 Apr 2018 09:29:08 +0800 Subject: usb: storage: Replace mdelay with msleep in init_freecom init_freecom() is never called in atomic context. init_freecom() is set as ".initFunction" through UNUSUAL_DEV(). And ->initFunction() is only called by usb_stor_acquire_resources(), which is only called by usb_stor_probe2(). usb_stor_probe2() is called by *_probe() functions (like alauda_probe()) for each USB driver. *_probe() functions are set ".probe" in struct usb_driver. These functions are not called in atomic context. Despite never getting called from atomic context, init_freecom() calls mdelay() to busily wait. This is not necessary and can be replaced with msleep() to avoid busy waiting. This is found by a static analysis tool named DCNS written by myself. And I also manually check it. Signed-off-by: Jia-Ju Bai Acked-by: Alan Stern Signed-off-by: Greg Kroah-Hartman --- drivers/usb/storage/freecom.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'drivers/usb') diff --git a/drivers/usb/storage/freecom.c b/drivers/usb/storage/freecom.c index ec4d92c..4f542df 100644 --- a/drivers/usb/storage/freecom.c +++ b/drivers/usb/storage/freecom.c @@ -464,7 +464,7 @@ static int init_freecom(struct us_data *us) usb_stor_dbg(us, "result from activate reset is %d\n", result); /* wait 250ms */ - mdelay(250); + msleep(250); /* clear reset */ result = usb_stor_control_msg(us, us->send_ctrl_pipe, @@ -472,7 +472,7 @@ static int init_freecom(struct us_data *us) usb_stor_dbg(us, "result from clear reset is %d\n", result); /* wait 3 seconds */ - mdelay(3 * 1000); + msleep(3 * 1000); return USB_STOR_TRANSPORT_GOOD; } -- cgit v1.1 From 0f0290089abd37ca54db764c294fe7e47624a313 Mon Sep 17 00:00:00 2001 From: Jia-Ju Bai Date: Tue, 10 Apr 2018 15:36:40 +0800 Subject: usb: isp1760: Replace mdelay with msleep in isp1760_init_core isp1760_init_core() is never called in atomic context. The call chains ending up at isp1760_init_core() are: [1] isp1760_init_core() <- isp1760_register() <- isp1760_plat_probe() [2] isp1760_init_core() <- isp1760_register() <- isp1761_pci_probe() isp1760_plat_probe() is set as ".probe" in struct platform_driver. isp1761_pci_probe() is set as ".probe" in struct pci_driver. These functions are not called in atomic context. Despite never getting called from atomic context, isp1761_pci_probe() calls mdelay() to busily wait. This is not necessary and can be replaced with msleep() to avoid busy waiting. This is found by a static analysis tool named DCNS written by myself. And I also manually check it. Signed-off-by: Jia-Ju Bai Signed-off-by: Greg Kroah-Hartman --- drivers/usb/isp1760/isp1760-core.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers/usb') diff --git a/drivers/usb/isp1760/isp1760-core.c b/drivers/usb/isp1760/isp1760-core.c index 05d2258..55b94fd 100644 --- a/drivers/usb/isp1760/isp1760-core.c +++ b/drivers/usb/isp1760/isp1760-core.c @@ -31,7 +31,7 @@ static void isp1760_init_core(struct isp1760_device *isp) /* Low-level chip reset */ if (isp->rst_gpio) { gpiod_set_value_cansleep(isp->rst_gpio, 1); - mdelay(50); + msleep(50); gpiod_set_value_cansleep(isp->rst_gpio, 0); } -- cgit v1.1 From de0611b27d15ddc831d4c47d3b4be592c5587948 Mon Sep 17 00:00:00 2001 From: Jia-Ju Bai Date: Tue, 10 Apr 2018 15:37:06 +0800 Subject: usb: isp1760: Replace mdelay with msleep in isp1760_stop isp1760_stop() is never called in atomic context. The call chain ending up at isp1760_stop() is: [1] isp1760_stop() <- isp1760_shutdown() isp1760_shutdown() is set as ".shutdown" in struct hc_driver. isp1760_stop() is also set as ".stop" in hc_driver. These functions are not called in atomic context. Despite never getting called from atomic context, isp1760_stop() calls mdelay() to busily wait. This is not necessary and can be replaced with msleep() to avoid busy waiting. This is found by a static analysis tool named DCNS written by myself. And I also manually check it Signed-off-by: Jia-Ju Bai Signed-off-by: Greg Kroah-Hartman --- drivers/usb/isp1760/isp1760-hcd.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers/usb') diff --git a/drivers/usb/isp1760/isp1760-hcd.c b/drivers/usb/isp1760/isp1760-hcd.c index 42672d6..1045521 100644 --- a/drivers/usb/isp1760/isp1760-hcd.c +++ b/drivers/usb/isp1760/isp1760-hcd.c @@ -2093,7 +2093,7 @@ static void isp1760_stop(struct usb_hcd *hcd) isp1760_hub_control(hcd, ClearPortFeature, USB_PORT_FEAT_POWER, 1, NULL, 0); - mdelay(20); + msleep(20); spin_lock_irq(&priv->lock); ehci_reset(hcd); -- cgit v1.1 From cd91a0e9d38fa85ad8e95ca7849ce4adc00e3caa Mon Sep 17 00:00:00 2001 From: Geert Uytterhoeven Date: Tue, 17 Apr 2018 19:49:20 +0200 Subject: usb: Remove depends on HAS_DMA in case of platform dependency Remove dependencies on HAS_DMA where a Kconfig symbol depends on another symbol that implies HAS_DMA, and, optionally, on "|| COMPILE_TEST". In most cases this other symbol is an architecture or platform specific symbol, or PCI. Generic symbols and drivers without platform dependencies keep their dependencies on HAS_DMA, to prevent compiling subsystems or drivers that cannot work anyway. This simplifies the dependencies, and allows to improve compile-testing. Signed-off-by: Geert Uytterhoeven Reviewed-by: Mark Brown Acked-by: Robin Murphy Acked-by: Felipe Balbi [drivers/usb/gadget/] Acked-by: Greg Kroah-Hartman Signed-off-by: Greg Kroah-Hartman --- drivers/usb/gadget/udc/Kconfig | 4 ++-- drivers/usb/mtu3/Kconfig | 2 +- 2 files changed, 3 insertions(+), 3 deletions(-) (limited to 'drivers/usb') diff --git a/drivers/usb/gadget/udc/Kconfig b/drivers/usb/gadget/udc/Kconfig index 0875d38..9c3b4f8 100644 --- a/drivers/usb/gadget/udc/Kconfig +++ b/drivers/usb/gadget/udc/Kconfig @@ -179,7 +179,7 @@ config USB_R8A66597 config USB_RENESAS_USBHS_UDC tristate 'Renesas USBHS controller' - depends on USB_RENESAS_USBHS && HAS_DMA + depends on USB_RENESAS_USBHS help Renesas USBHS is a discrete USB host and peripheral controller chip that supports both full and high speed USB 2.0 data transfers. @@ -192,7 +192,7 @@ config USB_RENESAS_USBHS_UDC config USB_RENESAS_USB3 tristate 'Renesas USB3.0 Peripheral controller' depends on ARCH_RENESAS || COMPILE_TEST - depends on EXTCON && HAS_DMA + depends on EXTCON help Renesas USB3.0 Peripheral controller is a USB peripheral controller that supports super, high, and full speed USB 3.0 data transfers. diff --git a/drivers/usb/mtu3/Kconfig b/drivers/usb/mtu3/Kconfig index 25cd619..c0c0eb8 100644 --- a/drivers/usb/mtu3/Kconfig +++ b/drivers/usb/mtu3/Kconfig @@ -2,7 +2,7 @@ config USB_MTU3 tristate "MediaTek USB3 Dual Role controller" - depends on EXTCON && (USB || USB_GADGET) && HAS_DMA + depends on EXTCON && (USB || USB_GADGET) depends on ARCH_MEDIATEK || COMPILE_TEST select USB_XHCI_MTK if USB_SUPPORT && USB_XHCI_HCD help -- cgit v1.1 From c95c975898e34437dfe8df483835ec833a66d704 Mon Sep 17 00:00:00 2001 From: Shuah Khan Date: Wed, 11 Apr 2018 18:13:30 -0600 Subject: usbip: usbip_host: refine probe and disconnect debug msgs to be useful Refine probe and disconnect debug msgs to be useful and say what is in progress. Signed-off-by: Shuah Khan Signed-off-by: Greg Kroah-Hartman --- drivers/usb/usbip/stub_dev.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'drivers/usb') diff --git a/drivers/usb/usbip/stub_dev.c b/drivers/usb/usbip/stub_dev.c index dd8ef36..7813c18 100644 --- a/drivers/usb/usbip/stub_dev.c +++ b/drivers/usb/usbip/stub_dev.c @@ -302,7 +302,7 @@ static int stub_probe(struct usb_device *udev) struct bus_id_priv *busid_priv; int rc; - dev_dbg(&udev->dev, "Enter\n"); + dev_dbg(&udev->dev, "Enter probe\n"); /* check we should claim or not by busid_table */ busid_priv = get_busid_priv(udev_busid); @@ -404,7 +404,7 @@ static void stub_disconnect(struct usb_device *udev) struct bus_id_priv *busid_priv; int rc; - dev_dbg(&udev->dev, "Enter\n"); + dev_dbg(&udev->dev, "Enter disconnect\n"); busid_priv = get_busid_priv(udev_busid); if (!busid_priv) { -- cgit v1.1 From 60b9f942bc059913bcdac90d5b225f557438b5c5 Mon Sep 17 00:00:00 2001 From: Johan Hovold Date: Wed, 18 Apr 2018 11:26:19 +0200 Subject: USB: phy: drop unused legacy controller-phy bind helper Drop the unused legacy usb_bind_phy() helper whose last user was removed in 2016 when OMAP moved to device-tree boot (9080b8dc761a ("ARM: OMAP2+: Remove legacy usb-host.c platform init code")). Note that this means that for the last couple of years the phy_bind_list has been empty (when using mainline kernels) and that consequently all phy lookups using the usb_get_phy_dev() interface have failed with -ENODEV. This helper along with its current users will be removed by follow-on patches. Signed-off-by: Johan Hovold Signed-off-by: Greg Kroah-Hartman --- drivers/usb/phy/phy.c | 34 ---------------------------------- 1 file changed, 34 deletions(-) (limited to 'drivers/usb') diff --git a/drivers/usb/phy/phy.c b/drivers/usb/phy/phy.c index bceb2c9..833547b 100644 --- a/drivers/usb/phy/phy.c +++ b/drivers/usb/phy/phy.c @@ -796,40 +796,6 @@ void usb_remove_phy(struct usb_phy *x) EXPORT_SYMBOL_GPL(usb_remove_phy); /** - * usb_bind_phy - bind the phy and the controller that uses the phy - * @dev_name: the device name of the device that will bind to the phy - * @index: index to specify the port number - * @phy_dev_name: the device name of the phy - * - * Fills the phy_bind structure with the dev_name and phy_dev_name. This will - * be used when the phy driver registers the phy and when the controller - * requests this phy. - * - * To be used by platform specific initialization code. - */ -int usb_bind_phy(const char *dev_name, u8 index, - const char *phy_dev_name) -{ - struct usb_phy_bind *phy_bind; - unsigned long flags; - - phy_bind = kzalloc(sizeof(*phy_bind), GFP_KERNEL); - if (!phy_bind) - return -ENOMEM; - - phy_bind->dev_name = dev_name; - phy_bind->phy_dev_name = phy_dev_name; - phy_bind->index = index; - - spin_lock_irqsave(&phy_lock, flags); - list_add_tail(&phy_bind->list, &phy_bind_list); - spin_unlock_irqrestore(&phy_lock, flags); - - return 0; -} -EXPORT_SYMBOL_GPL(usb_bind_phy); - -/** * usb_phy_set_event - set event to phy event * @x: the phy returned by usb_get_phy(); * -- cgit v1.1 From bc40f53417410be18298c5b5dbf5bcae9588d84f Mon Sep 17 00:00:00 2001 From: Johan Hovold Date: Wed, 18 Apr 2018 11:26:20 +0200 Subject: USB: core: hcd: drop support for legacy phys Drop support for looking up and initialising legacy phys in USB core, something which hasn't been used by a mainline kernel since commit 9080b8dc761a ("ARM: OMAP2+: Remove legacy usb-host.c platform init code"). Specifically, since that commit usb_get_phy_dev() have always returned -ENODEV and consequently this code has not been used. Signed-off-by: Johan Hovold Signed-off-by: Greg Kroah-Hartman --- drivers/usb/core/hcd.c | 38 +++----------------------------------- 1 file changed, 3 insertions(+), 35 deletions(-) (limited to 'drivers/usb') diff --git a/drivers/usb/core/hcd.c b/drivers/usb/core/hcd.c index 777036a..6241d32 100644 --- a/drivers/usb/core/hcd.c +++ b/drivers/usb/core/hcd.c @@ -33,7 +33,6 @@ #include #include #include -#include #include #include "usb.h" @@ -2739,30 +2738,10 @@ int usb_add_hcd(struct usb_hcd *hcd, int retval; struct usb_device *rhdev; - if (IS_ENABLED(CONFIG_USB_PHY) && !hcd->skip_phy_initialization) { - struct usb_phy *phy = usb_get_phy_dev(hcd->self.sysdev, 0); - - if (IS_ERR(phy)) { - retval = PTR_ERR(phy); - if (retval == -EPROBE_DEFER) - return retval; - } else { - retval = usb_phy_init(phy); - if (retval) { - usb_put_phy(phy); - return retval; - } - hcd->usb_phy = phy; - hcd->remove_phy = 1; - } - } - if (!hcd->skip_phy_initialization && usb_hcd_is_primary_hcd(hcd)) { hcd->phy_roothub = usb_phy_roothub_init(hcd->self.sysdev); - if (IS_ERR(hcd->phy_roothub)) { - retval = PTR_ERR(hcd->phy_roothub); - goto err_phy_roothub_init; - } + if (IS_ERR(hcd->phy_roothub)) + return PTR_ERR(hcd->phy_roothub); retval = usb_phy_roothub_power_on(hcd->phy_roothub); if (retval) @@ -2936,12 +2915,7 @@ err_create_buf: usb_phy_roothub_power_off(hcd->phy_roothub); err_usb_phy_roothub_power_on: usb_phy_roothub_exit(hcd->phy_roothub); -err_phy_roothub_init: - if (hcd->remove_phy && hcd->usb_phy) { - usb_phy_shutdown(hcd->usb_phy); - usb_put_phy(hcd->usb_phy); - hcd->usb_phy = NULL; - } + return retval; } EXPORT_SYMBOL_GPL(usb_add_hcd); @@ -3017,12 +2991,6 @@ void usb_remove_hcd(struct usb_hcd *hcd) usb_phy_roothub_power_off(hcd->phy_roothub); usb_phy_roothub_exit(hcd->phy_roothub); - if (hcd->remove_phy && hcd->usb_phy) { - usb_phy_shutdown(hcd->usb_phy); - usb_put_phy(hcd->usb_phy); - hcd->usb_phy = NULL; - } - usb_put_invalidate_rhdev(hcd); hcd->flags = 0; } -- cgit v1.1 From e90308a65c34c3632883e0a826b5f70c57ae8baf Mon Sep 17 00:00:00 2001 From: Johan Hovold Date: Wed, 18 Apr 2018 11:26:21 +0200 Subject: USB: ehci-omap: drop unused legacy phy support Drop support for looking up legacy phys defined by board files, something which hasn't been used by a mainline kernel since commit 9080b8dc761a ("ARM: OMAP2+: Remove legacy usb-host.c platform init code"). Specifically, since that commit usb_get_phy_dev() have always returned -ENODEV and consequently this code has not been used. Signed-off-by: Johan Hovold Signed-off-by: Greg Kroah-Hartman --- drivers/usb/host/ehci-omap.c | 5 +---- 1 file changed, 1 insertion(+), 4 deletions(-) (limited to 'drivers/usb') diff --git a/drivers/usb/host/ehci-omap.c b/drivers/usb/host/ehci-omap.c index 8d8bafc..7e4c1334 100644 --- a/drivers/usb/host/ehci-omap.c +++ b/drivers/usb/host/ehci-omap.c @@ -157,10 +157,7 @@ static int ehci_hcd_omap_probe(struct platform_device *pdev) struct usb_phy *phy; /* get the PHY device */ - if (dev->of_node) - phy = devm_usb_get_phy_by_phandle(dev, "phys", i); - else - phy = devm_usb_get_phy_dev(dev, i); + phy = devm_usb_get_phy_by_phandle(dev, "phys", i); if (IS_ERR(phy)) { /* Don't bail out if PHY is not absolutely necessary */ if (pdata->port_mode[i] != OMAP_EHCI_PORT_MODE_PHY) -- cgit v1.1 From 5ee1787e5efb9bbc11403740df4393587c47ab65 Mon Sep 17 00:00:00 2001 From: Johan Hovold Date: Wed, 18 Apr 2018 11:26:22 +0200 Subject: USB: musb: omap2430: drop non-DT support Drop support for non-DT systems, which hasn't been used by a mainline kernel since commit 9080b8dc761a ("ARM: OMAP2+: Remove legacy usb-host.c platform init code"). Specifically, since that commit usb_get_phy_dev() have always returned -ENODEV when looking up a legacy phy, something which in turn would have led to the init callback returning -EPROBE_DEFER indefinitely. Signed-off-by: Johan Hovold Signed-off-by: Greg Kroah-Hartman --- drivers/usb/musb/omap2430.c | 95 +++++++++++++++++++++------------------------ 1 file changed, 45 insertions(+), 50 deletions(-) (limited to 'drivers/usb') diff --git a/drivers/usb/musb/omap2430.c b/drivers/usb/musb/omap2430.c index 5d70593..3dd6e1c 100644 --- a/drivers/usb/musb/omap2430.c +++ b/drivers/usb/musb/omap2430.c @@ -239,21 +239,15 @@ static int omap2430_musb_init(struct musb *musb) * up through ULPI. TWL4030-family PMICs include one, * which needs a driver, drivers aren't always needed. */ - if (dev->parent->of_node) { - musb->phy = devm_phy_get(dev->parent, "usb2-phy"); - - /* We can't totally remove musb->xceiv as of now because - * musb core uses xceiv.state and xceiv.otg. Once we have - * a separate state machine to handle otg, these can be moved - * out of xceiv and then we can start using the generic PHY - * framework - */ - musb->xceiv = devm_usb_get_phy_by_phandle(dev->parent, - "usb-phy", 0); - } else { - musb->xceiv = devm_usb_get_phy_dev(dev, 0); - musb->phy = devm_phy_get(dev, "usb"); - } + musb->phy = devm_phy_get(dev->parent, "usb2-phy"); + + /* We can't totally remove musb->xceiv as of now because + * musb core uses xceiv.state and xceiv.otg. Once we have + * a separate state machine to handle otg, these can be moved + * out of xceiv and then we can start using the generic PHY + * framework + */ + musb->xceiv = devm_usb_get_phy_by_phandle(dev->parent, "usb-phy", 0); if (IS_ERR(musb->xceiv)) { status = PTR_ERR(musb->xceiv); @@ -391,8 +385,13 @@ static int omap2430_probe(struct platform_device *pdev) struct omap2430_glue *glue; struct device_node *np = pdev->dev.of_node; struct musb_hdrc_config *config; + struct device_node *control_node; + struct platform_device *control_pdev; int ret = -ENOMEM, val; + if (!np) + return -ENODEV; + glue = devm_kzalloc(&pdev->dev, sizeof(*glue), GFP_KERNEL); if (!glue) goto err0; @@ -412,47 +411,43 @@ static int omap2430_probe(struct platform_device *pdev) glue->status = MUSB_UNKNOWN; glue->control_otghs = ERR_PTR(-ENODEV); - if (np) { - struct device_node *control_node; - struct platform_device *control_pdev; + pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL); + if (!pdata) + goto err2; - pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL); - if (!pdata) - goto err2; + data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL); + if (!data) + goto err2; - data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL); - if (!data) - goto err2; + config = devm_kzalloc(&pdev->dev, sizeof(*config), GFP_KERNEL); + if (!config) + goto err2; - config = devm_kzalloc(&pdev->dev, sizeof(*config), GFP_KERNEL); - if (!config) + of_property_read_u32(np, "mode", (u32 *)&pdata->mode); + of_property_read_u32(np, "interface-type", + (u32 *)&data->interface_type); + of_property_read_u32(np, "num-eps", (u32 *)&config->num_eps); + of_property_read_u32(np, "ram-bits", (u32 *)&config->ram_bits); + of_property_read_u32(np, "power", (u32 *)&pdata->power); + + ret = of_property_read_u32(np, "multipoint", &val); + if (!ret && val) + config->multipoint = true; + + pdata->board_data = data; + pdata->config = config; + + control_node = of_parse_phandle(np, "ctrl-module", 0); + if (control_node) { + control_pdev = of_find_device_by_node(control_node); + if (!control_pdev) { + dev_err(&pdev->dev, "Failed to get control device\n"); + ret = -EINVAL; goto err2; - - of_property_read_u32(np, "mode", (u32 *)&pdata->mode); - of_property_read_u32(np, "interface-type", - (u32 *)&data->interface_type); - of_property_read_u32(np, "num-eps", (u32 *)&config->num_eps); - of_property_read_u32(np, "ram-bits", (u32 *)&config->ram_bits); - of_property_read_u32(np, "power", (u32 *)&pdata->power); - - ret = of_property_read_u32(np, "multipoint", &val); - if (!ret && val) - config->multipoint = true; - - pdata->board_data = data; - pdata->config = config; - - control_node = of_parse_phandle(np, "ctrl-module", 0); - if (control_node) { - control_pdev = of_find_device_by_node(control_node); - if (!control_pdev) { - dev_err(&pdev->dev, "Failed to get control device\n"); - ret = -EINVAL; - goto err2; - } - glue->control_otghs = &control_pdev->dev; } + glue->control_otghs = &control_pdev->dev; } + pdata->platform_ops = &omap2430_ops; platform_set_drvdata(pdev, glue); -- cgit v1.1 From d8351953fbb6ed6d7834ac57d9d943d2177c2b20 Mon Sep 17 00:00:00 2001 From: Johan Hovold Date: Wed, 18 Apr 2018 11:26:23 +0200 Subject: USB: renesas_usbhs: drop unused legacy-phy support Drop support for legacy phys for rcar2 which hasn't been used with a mainline kernel since commit 9080b8dc761a ("ARM: OMAP2+: Remove legacy usb-host.c platform init code"). Specifically, since that commit usb_get_phy_dev() have always returned -ENODEV and consequently this code has not been used. Note that the legacy-phy API is still being used in gadget mode to bind the peripheral controller. Acked-by: Yoshihiro Shimoda Signed-off-by: Johan Hovold Signed-off-by: Greg Kroah-Hartman --- drivers/usb/renesas_usbhs/common.h | 1 - drivers/usb/renesas_usbhs/rcar2.c | 29 ----------------------------- 2 files changed, 30 deletions(-) (limited to 'drivers/usb') diff --git a/drivers/usb/renesas_usbhs/common.h b/drivers/usb/renesas_usbhs/common.h index f619afe..6137f79 100644 --- a/drivers/usb/renesas_usbhs/common.h +++ b/drivers/usb/renesas_usbhs/common.h @@ -276,7 +276,6 @@ struct usbhs_priv { */ struct usbhs_fifo_info fifo_info; - struct usb_phy *usb_phy; struct phy *phy; }; diff --git a/drivers/usb/renesas_usbhs/rcar2.c b/drivers/usb/renesas_usbhs/rcar2.c index 85a0e09..0027092 100644 --- a/drivers/usb/renesas_usbhs/rcar2.c +++ b/drivers/usb/renesas_usbhs/rcar2.c @@ -8,7 +8,6 @@ #include #include #include -#include #include "common.h" #include "rcar2.h" @@ -26,16 +25,6 @@ static int usbhs_rcar2_hardware_init(struct platform_device *pdev) return 0; } - if (IS_ENABLED(CONFIG_USB_PHY)) { - struct usb_phy *usb_phy = usb_get_phy_dev(&pdev->dev, 0); - - if (IS_ERR(usb_phy)) - return PTR_ERR(usb_phy); - - priv->usb_phy = usb_phy; - return 0; - } - return -ENXIO; } @@ -48,11 +37,6 @@ static int usbhs_rcar2_hardware_exit(struct platform_device *pdev) priv->phy = NULL; } - if (priv->usb_phy) { - usb_put_phy(priv->usb_phy); - priv->usb_phy = NULL; - } - return 0; } @@ -75,19 +59,6 @@ static int usbhs_rcar2_power_ctrl(struct platform_device *pdev, } } - if (priv->usb_phy) { - if (enable) { - retval = usb_phy_init(priv->usb_phy); - - if (!retval) - retval = usb_phy_set_suspend(priv->usb_phy, 0); - } else { - usb_phy_set_suspend(priv->usb_phy, 1); - usb_phy_shutdown(priv->usb_phy); - retval = 0; - } - } - return retval; } -- cgit v1.1 From c3c0ac70c77d34c03e9600170932b2c28478795f Mon Sep 17 00:00:00 2001 From: Johan Hovold Date: Wed, 18 Apr 2018 11:26:24 +0200 Subject: USB: phy: drop legacy board-file support The legacy interface for associating controllers with phys from board files and platform code has been unused since commit 9080b8dc761a ("ARM: OMAP2+: Remove legacy usb-host.c platform init code"). Since then, all calls to usb_get_phy_dev() and its devres version have been returning -ENODEV. Now that the final calls to these functions have been removed, we can drop this legacy lookup interface altogether. Signed-off-by: Johan Hovold Signed-off-by: Greg Kroah-Hartman --- drivers/usb/phy/phy.c | 99 ++------------------------------------------------- 1 file changed, 2 insertions(+), 97 deletions(-) (limited to 'drivers/usb') diff --git a/drivers/usb/phy/phy.c b/drivers/usb/phy/phy.c index 833547b..0277f627 100644 --- a/drivers/usb/phy/phy.c +++ b/drivers/usb/phy/phy.c @@ -27,7 +27,6 @@ #define DEFAULT_ACA_CUR_MAX 5000 static LIST_HEAD(phy_list); -static LIST_HEAD(phy_bind_list); static DEFINE_SPINLOCK(phy_lock); struct phy_devm { @@ -50,24 +49,6 @@ static struct usb_phy *__usb_find_phy(struct list_head *list, return ERR_PTR(-ENODEV); } -static struct usb_phy *__usb_find_phy_dev(struct device *dev, - struct list_head *list, u8 index) -{ - struct usb_phy_bind *phy_bind = NULL; - - list_for_each_entry(phy_bind, list, list) { - if (!(strcmp(phy_bind->dev_name, dev_name(dev))) && - phy_bind->index == index) { - if (phy_bind->phy) - return phy_bind->phy; - else - return ERR_PTR(-EPROBE_DEFER); - } - } - - return ERR_PTR(-ENODEV); -} - static struct usb_phy *__of_usb_find_phy(struct device_node *node) { struct usb_phy *phy; @@ -585,72 +566,6 @@ struct usb_phy *devm_usb_get_phy_by_phandle(struct device *dev, EXPORT_SYMBOL_GPL(devm_usb_get_phy_by_phandle); /** - * usb_get_phy_dev - find the USB PHY - * @dev - device that requests this phy - * @index - the index of the phy - * - * Returns the phy driver, after getting a refcount to it; or - * -ENODEV if there is no such phy. The caller is responsible for - * calling usb_put_phy() to release that count. - * - * For use by USB host and peripheral drivers. - */ -struct usb_phy *usb_get_phy_dev(struct device *dev, u8 index) -{ - struct usb_phy *phy = NULL; - unsigned long flags; - - spin_lock_irqsave(&phy_lock, flags); - - phy = __usb_find_phy_dev(dev, &phy_bind_list, index); - if (IS_ERR(phy) || !try_module_get(phy->dev->driver->owner)) { - dev_dbg(dev, "unable to find transceiver\n"); - if (!IS_ERR(phy)) - phy = ERR_PTR(-ENODEV); - - goto err0; - } - - get_device(phy->dev); - -err0: - spin_unlock_irqrestore(&phy_lock, flags); - - return phy; -} -EXPORT_SYMBOL_GPL(usb_get_phy_dev); - -/** - * devm_usb_get_phy_dev - find the USB PHY using device ptr and index - * @dev - device that requests this phy - * @index - the index of the phy - * - * Gets the phy using usb_get_phy_dev(), and associates a device with it using - * devres. On driver detach, release function is invoked on the devres data, - * then, devres data is freed. - * - * For use by USB host and peripheral drivers. - */ -struct usb_phy *devm_usb_get_phy_dev(struct device *dev, u8 index) -{ - struct usb_phy **ptr, *phy; - - ptr = devres_alloc(devm_usb_phy_release, sizeof(*ptr), GFP_KERNEL); - if (!ptr) - return NULL; - - phy = usb_get_phy_dev(dev, index); - if (!IS_ERR(phy)) { - *ptr = phy; - devres_add(dev, ptr); - } else - devres_free(ptr); - - return phy; -} -EXPORT_SYMBOL_GPL(devm_usb_get_phy_dev); - -/** * devm_usb_put_phy - release the USB PHY * @dev - device that wants to release this phy * @phy - the phy returned by devm_usb_get_phy() @@ -745,7 +660,6 @@ EXPORT_SYMBOL_GPL(usb_add_phy); */ int usb_add_phy_dev(struct usb_phy *x) { - struct usb_phy_bind *phy_bind; unsigned long flags; int ret; @@ -762,13 +676,9 @@ int usb_add_phy_dev(struct usb_phy *x) ATOMIC_INIT_NOTIFIER_HEAD(&x->notifier); spin_lock_irqsave(&phy_lock, flags); - list_for_each_entry(phy_bind, &phy_bind_list, list) - if (!(strcmp(phy_bind->phy_dev_name, dev_name(x->dev)))) - phy_bind->phy = x; - list_add_tail(&x->head, &phy_list); - spin_unlock_irqrestore(&phy_lock, flags); + return 0; } EXPORT_SYMBOL_GPL(usb_add_phy_dev); @@ -782,15 +692,10 @@ EXPORT_SYMBOL_GPL(usb_add_phy_dev); void usb_remove_phy(struct usb_phy *x) { unsigned long flags; - struct usb_phy_bind *phy_bind; spin_lock_irqsave(&phy_lock, flags); - if (x) { - list_for_each_entry(phy_bind, &phy_bind_list, list) - if (phy_bind->phy == x) - phy_bind->phy = NULL; + if (x) list_del(&x->head); - } spin_unlock_irqrestore(&phy_lock, flags); } EXPORT_SYMBOL_GPL(usb_remove_phy); -- cgit v1.1 From 8bffbdb6d829b9d69ffb21abb50e15e0c0938c77 Mon Sep 17 00:00:00 2001 From: Wolfram Sang Date: Thu, 19 Apr 2018 16:06:26 +0200 Subject: usb: phy: simplify getting .drvdata We should get drvdata from struct device directly. Going via platform_device is an unneeded step back and forth. Signed-off-by: Wolfram Sang Signed-off-by: Greg Kroah-Hartman --- drivers/usb/phy/phy-am335x.c | 6 ++---- 1 file changed, 2 insertions(+), 4 deletions(-) (limited to 'drivers/usb') diff --git a/drivers/usb/phy/phy-am335x.c b/drivers/usb/phy/phy-am335x.c index b36fa8b..27bdb72 100644 --- a/drivers/usb/phy/phy-am335x.c +++ b/drivers/usb/phy/phy-am335x.c @@ -96,8 +96,7 @@ static int am335x_phy_remove(struct platform_device *pdev) #ifdef CONFIG_PM_SLEEP static int am335x_phy_suspend(struct device *dev) { - struct platform_device *pdev = to_platform_device(dev); - struct am335x_phy *am_phy = platform_get_drvdata(pdev); + struct am335x_phy *am_phy = dev_get_drvdata(dev); /* * Enable phy wakeup only if dev->power.can_wakeup is true. @@ -117,8 +116,7 @@ static int am335x_phy_suspend(struct device *dev) static int am335x_phy_resume(struct device *dev) { - struct platform_device *pdev = to_platform_device(dev); - struct am335x_phy *am_phy = platform_get_drvdata(pdev); + struct am335x_phy *am_phy = dev_get_drvdata(dev); phy_ctrl_power(am_phy->phy_ctrl, am_phy->id, am_phy->dr_mode, true); -- cgit v1.1 From f86c6888ddee4dd3169011b984de850620fcdda1 Mon Sep 17 00:00:00 2001 From: Wolfram Sang Date: Thu, 19 Apr 2018 16:06:25 +0200 Subject: usb: mtu3: simplify getting .drvdata We should get drvdata from struct device directly. Going via platform_device is an unneeded step back and forth. Signed-off-by: Wolfram Sang Acked-by: Chunfeng Yun Signed-off-by: Greg Kroah-Hartman --- drivers/usb/mtu3/mtu3_plat.c | 6 ++---- 1 file changed, 2 insertions(+), 4 deletions(-) (limited to 'drivers/usb') diff --git a/drivers/usb/mtu3/mtu3_plat.c b/drivers/usb/mtu3/mtu3_plat.c index 628d5ce..46551f6 100644 --- a/drivers/usb/mtu3/mtu3_plat.c +++ b/drivers/usb/mtu3/mtu3_plat.c @@ -447,8 +447,7 @@ static int mtu3_remove(struct platform_device *pdev) */ static int __maybe_unused mtu3_suspend(struct device *dev) { - struct platform_device *pdev = to_platform_device(dev); - struct ssusb_mtk *ssusb = platform_get_drvdata(pdev); + struct ssusb_mtk *ssusb = dev_get_drvdata(dev); dev_dbg(dev, "%s\n", __func__); @@ -466,8 +465,7 @@ static int __maybe_unused mtu3_suspend(struct device *dev) static int __maybe_unused mtu3_resume(struct device *dev) { - struct platform_device *pdev = to_platform_device(dev); - struct ssusb_mtk *ssusb = platform_get_drvdata(pdev); + struct ssusb_mtk *ssusb = dev_get_drvdata(dev); int ret; dev_dbg(dev, "%s\n", __func__); -- cgit v1.1 From 5d111f5190848d6fb1c414dc57797efea3526a2f Mon Sep 17 00:00:00 2001 From: Dominik Bozek Date: Fri, 13 Apr 2018 10:42:31 -0700 Subject: usb: hub: Don't wait for connect state at resume for powered-off ports wait_for_connected() wait till a port change status to USB_PORT_STAT_CONNECTION, but this is not possible if the port is unpowered. The loop will only exit at timeout. Such case take place if an over-current incident happen while system is in S3. Then during resume wait_for_connected() will wait 2s, which may be noticeable by the user. Signed-off-by: Dominik Bozek Signed-off-by: Kuppuswamy Sathyanarayanan Signed-off-by: Greg Kroah-Hartman --- drivers/usb/core/hub.c | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'drivers/usb') diff --git a/drivers/usb/core/hub.c b/drivers/usb/core/hub.c index f6ea16e..9e79bcf 100644 --- a/drivers/usb/core/hub.c +++ b/drivers/usb/core/hub.c @@ -3371,6 +3371,10 @@ static int wait_for_connected(struct usb_device *udev, while (delay_ms < 2000) { if (status || *portstatus & USB_PORT_STAT_CONNECTION) break; + if (!port_is_power_on(hub, *portstatus)) { + status = -ENODEV; + break; + } msleep(20); delay_ms += 20; status = hub_port_status(hub, *port1, portstatus, portchange); -- cgit v1.1 From 53fe0de9a35d7149e17dcdd03c55def617a937a7 Mon Sep 17 00:00:00 2001 From: Li Jun Date: Mon, 16 Apr 2018 14:54:33 +0800 Subject: usb: typec: tcpm: pdo matching optimization This patch is a combination of commit 57e6f0d7b804 ("typec: tcpm: Only request matching pdos") and source pdo selection optimization based on it, instead of only compare between the same pdo type of sink and source, we should check source pdo voltage range is within the voltage range of one sink pdo. Reviewed-by: Hans de Goede Signed-off-by: Li Jun Reviewed-by: Guenter Roeck Acked-by: Heikki Krogerus Signed-off-by: Greg Kroah-Hartman --- drivers/usb/typec/tcpm.c | 105 ++++++++++++++++++++++++++++++----------------- 1 file changed, 67 insertions(+), 38 deletions(-) (limited to 'drivers/usb') diff --git a/drivers/usb/typec/tcpm.c b/drivers/usb/typec/tcpm.c index 677d121..048b953 100644 --- a/drivers/usb/typec/tcpm.c +++ b/drivers/usb/typec/tcpm.c @@ -1772,39 +1772,63 @@ static int tcpm_pd_check_request(struct tcpm_port *port) return 0; } -static int tcpm_pd_select_pdo(struct tcpm_port *port) +#define min_power(x, y) min(pdo_max_power(x), pdo_max_power(y)) +#define min_current(x, y) min(pdo_max_current(x), pdo_max_current(y)) + +static int tcpm_pd_select_pdo(struct tcpm_port *port, int *sink_pdo, + int *src_pdo) { - unsigned int i, max_mw = 0, max_mv = 0; + unsigned int i, j, max_src_mv = 0, min_src_mv = 0, max_mw = 0, + max_mv = 0, src_mw = 0, src_ma = 0, max_snk_mv = 0, + min_snk_mv = 0; int ret = -EINVAL; /* - * Select the source PDO providing the most power while staying within - * the board's voltage limits. Prefer PDO providing exp + * Select the source PDO providing the most power which has a + * matchig sink cap. */ for (i = 0; i < port->nr_source_caps; i++) { u32 pdo = port->source_caps[i]; enum pd_pdo_type type = pdo_type(pdo); - unsigned int mv, ma, mw; - if (type == PDO_TYPE_FIXED) - mv = pdo_fixed_voltage(pdo); - else - mv = pdo_min_voltage(pdo); + if (type == PDO_TYPE_FIXED) { + max_src_mv = pdo_fixed_voltage(pdo); + min_src_mv = max_src_mv; + } else { + max_src_mv = pdo_max_voltage(pdo); + min_src_mv = pdo_min_voltage(pdo); + } if (type == PDO_TYPE_BATT) { - mw = pdo_max_power(pdo); + src_mw = pdo_max_power(pdo); } else { - ma = min(pdo_max_current(pdo), - port->max_snk_ma); - mw = ma * mv / 1000; + src_ma = pdo_max_current(pdo); + src_mw = src_ma * min_src_mv / 1000; } - /* Perfer higher voltages if available */ - if ((mw > max_mw || (mw == max_mw && mv > max_mv)) && - mv <= port->max_snk_mv) { - ret = i; - max_mw = mw; - max_mv = mv; + for (j = 0; j < port->nr_snk_pdo; j++) { + pdo = port->snk_pdo[j]; + + if (pdo_type(pdo) == PDO_TYPE_FIXED) { + min_snk_mv = pdo_fixed_voltage(pdo); + max_snk_mv = pdo_fixed_voltage(pdo); + } else { + min_snk_mv = pdo_min_voltage(pdo); + max_snk_mv = pdo_max_voltage(pdo); + } + + if (max_src_mv <= max_snk_mv && + min_src_mv >= min_snk_mv) { + /* Prefer higher voltages if available */ + if ((src_mw == max_mw && min_src_mv > max_mv) || + src_mw > max_mw) { + *src_pdo = i; + *sink_pdo = j; + max_mw = src_mw; + max_mv = min_src_mv; + ret = 0; + } + } } } @@ -1816,13 +1840,16 @@ static int tcpm_pd_build_request(struct tcpm_port *port, u32 *rdo) unsigned int mv, ma, mw, flags; unsigned int max_ma, max_mw; enum pd_pdo_type type; - int index; - u32 pdo; + int src_pdo_index, snk_pdo_index; + u32 pdo, matching_snk_pdo; + int ret; - index = tcpm_pd_select_pdo(port); - if (index < 0) - return -EINVAL; - pdo = port->source_caps[index]; + ret = tcpm_pd_select_pdo(port, &snk_pdo_index, &src_pdo_index); + if (ret < 0) + return ret; + + pdo = port->source_caps[src_pdo_index]; + matching_snk_pdo = port->snk_pdo[snk_pdo_index]; type = pdo_type(pdo); if (type == PDO_TYPE_FIXED) @@ -1830,26 +1857,28 @@ static int tcpm_pd_build_request(struct tcpm_port *port, u32 *rdo) else mv = pdo_min_voltage(pdo); - /* Select maximum available current within the board's power limit */ + /* Select maximum available current within the sink pdo's limit */ if (type == PDO_TYPE_BATT) { - mw = pdo_max_power(pdo); - ma = 1000 * min(mw, port->max_snk_mw) / mv; + mw = min_power(pdo, matching_snk_pdo); + ma = 1000 * mw / mv; } else { - ma = min(pdo_max_current(pdo), - 1000 * port->max_snk_mw / mv); + ma = min_current(pdo, matching_snk_pdo); + mw = ma * mv / 1000; } - ma = min(ma, port->max_snk_ma); flags = RDO_USB_COMM | RDO_NO_SUSPEND; /* Set mismatch bit if offered power is less than operating power */ - mw = ma * mv / 1000; max_ma = ma; max_mw = mw; if (mw < port->operating_snk_mw) { flags |= RDO_CAP_MISMATCH; - max_mw = port->operating_snk_mw; - max_ma = max_mw * 1000 / mv; + if (type == PDO_TYPE_BATT && + (pdo_max_power(matching_snk_pdo) > pdo_max_power(pdo))) + max_mw = pdo_max_power(matching_snk_pdo); + else if (pdo_max_current(matching_snk_pdo) > + pdo_max_current(pdo)) + max_ma = pdo_max_current(matching_snk_pdo); } tcpm_log(port, "cc=%d cc1=%d cc2=%d vbus=%d vconn=%s polarity=%d", @@ -1858,16 +1887,16 @@ static int tcpm_pd_build_request(struct tcpm_port *port, u32 *rdo) port->polarity); if (type == PDO_TYPE_BATT) { - *rdo = RDO_BATT(index + 1, mw, max_mw, flags); + *rdo = RDO_BATT(src_pdo_index + 1, mw, max_mw, flags); tcpm_log(port, "Requesting PDO %d: %u mV, %u mW%s", - index, mv, mw, + src_pdo_index, mv, mw, flags & RDO_CAP_MISMATCH ? " [mismatch]" : ""); } else { - *rdo = RDO_FIXED(index + 1, ma, max_ma, flags); + *rdo = RDO_FIXED(src_pdo_index + 1, ma, max_ma, flags); tcpm_log(port, "Requesting PDO %d: %u mV, %u mA%s", - index, mv, ma, + src_pdo_index, mv, ma, flags & RDO_CAP_MISMATCH ? " [mismatch]" : ""); } -- cgit v1.1 From b33d3180f427d2b76a754e4cfe8bfdc234fcad10 Mon Sep 17 00:00:00 2001 From: Li Jun Date: Mon, 16 Apr 2018 14:54:34 +0800 Subject: usb: typec: fusb302: remove max_snk_* for sink config Since max_snk_* is to be deprecated, so remove max_snk_* by adding a variable PDO for sink config. Reviewed-by: Hans de Goede Signed-off-by: Li Jun Reviewed-by: Guenter Roeck Acked-by: Heikki Krogerus Signed-off-by: Greg Kroah-Hartman --- drivers/usb/typec/fusb302/fusb302.c | 42 ++++++++++++++++++++++++------------- 1 file changed, 28 insertions(+), 14 deletions(-) (limited to 'drivers/usb') diff --git a/drivers/usb/typec/fusb302/fusb302.c b/drivers/usb/typec/fusb302/fusb302.c index 7036171..664463d 100644 --- a/drivers/usb/typec/fusb302/fusb302.c +++ b/drivers/usb/typec/fusb302/fusb302.c @@ -120,6 +120,7 @@ struct fusb302_chip { enum typec_cc_polarity cc_polarity; enum typec_cc_status cc1; enum typec_cc_status cc2; + u32 snk_pdo[PDO_MAX_OBJECTS]; #ifdef CONFIG_DEBUG_FS struct dentry *dentry; @@ -1212,11 +1213,6 @@ static const u32 snk_pdo[] = { static const struct tcpc_config fusb302_tcpc_config = { .src_pdo = src_pdo, .nr_src_pdo = ARRAY_SIZE(src_pdo), - .snk_pdo = snk_pdo, - .nr_snk_pdo = ARRAY_SIZE(snk_pdo), - .max_snk_mv = 5000, - .max_snk_ma = 3000, - .max_snk_mw = 15000, .operating_snk_mw = 2500, .type = TYPEC_PORT_DRP, .data = TYPEC_PORT_DRD, @@ -1756,6 +1752,29 @@ static int init_gpio(struct fusb302_chip *chip) return 0; } +static int fusb302_composite_snk_pdo_array(struct fusb302_chip *chip) +{ + struct device *dev = chip->dev; + u32 max_uv, max_ua; + + chip->snk_pdo[0] = PDO_FIXED(5000, 400, PDO_FIXED_FLAGS); + + /* + * As max_snk_ma/mv/mw is not needed for tcpc_config, + * those settings should be passed in via sink PDO, so + * "fcs, max-sink-*" properties will be deprecated, to + * perserve compatibility with existing users of them, + * we read those properties to convert them to be a var + * PDO. + */ + if (device_property_read_u32(dev, "fcs,max-sink-microvolt", &max_uv) || + device_property_read_u32(dev, "fcs,max-sink-microamp", &max_ua)) + return 1; + + chip->snk_pdo[1] = PDO_VAR(5000, max_uv / 1000, max_ua / 1000); + return 2; +} + static int fusb302_probe(struct i2c_client *client, const struct i2c_device_id *id) { @@ -1784,18 +1803,13 @@ static int fusb302_probe(struct i2c_client *client, chip->tcpc_dev.config = &chip->tcpc_config; mutex_init(&chip->lock); - if (!device_property_read_u32(dev, "fcs,max-sink-microvolt", &v)) - chip->tcpc_config.max_snk_mv = v / 1000; - - if (!device_property_read_u32(dev, "fcs,max-sink-microamp", &v)) - chip->tcpc_config.max_snk_ma = v / 1000; - - if (!device_property_read_u32(dev, "fcs,max-sink-microwatt", &v)) - chip->tcpc_config.max_snk_mw = v / 1000; - if (!device_property_read_u32(dev, "fcs,operating-sink-microwatt", &v)) chip->tcpc_config.operating_snk_mw = v / 1000; + /* Composite sink PDO */ + chip->tcpc_config.nr_snk_pdo = fusb302_composite_snk_pdo_array(chip); + chip->tcpc_config.snk_pdo = chip->snk_pdo; + /* * Devicetree platforms should get extcon via phandle (not yet * supported). On ACPI platforms, we get the name from a device prop. -- cgit v1.1 From c457a9c4fe78a443fcbd7701812e8f8382638689 Mon Sep 17 00:00:00 2001 From: Li Jun Date: Mon, 16 Apr 2018 14:54:36 +0800 Subject: usb: typec: wcove: remove max_snk_* for sink config Since max_snk_* is to be deprecated, so remove max_snk_* by adding a variable PDO for sink config. Reviewed-by: Hans de Goede Signed-off-by: Li Jun Reviewed-by: Guenter Roeck Acked-by: Heikki Krogerus Signed-off-by: Greg Kroah-Hartman --- drivers/usb/typec/typec_wcove.c | 4 +--- 1 file changed, 1 insertion(+), 3 deletions(-) (limited to 'drivers/usb') diff --git a/drivers/usb/typec/typec_wcove.c b/drivers/usb/typec/typec_wcove.c index 19cca7f..39cff11 100644 --- a/drivers/usb/typec/typec_wcove.c +++ b/drivers/usb/typec/typec_wcove.c @@ -558,6 +558,7 @@ static const u32 src_pdo[] = { static const u32 snk_pdo[] = { PDO_FIXED(5000, 500, PDO_FIXED_DUAL_ROLE | PDO_FIXED_DATA_SWAP | PDO_FIXED_USB_COMM), + PDO_VAR(5000, 12000, 3000), }; static struct tcpc_config wcove_typec_config = { @@ -566,9 +567,6 @@ static struct tcpc_config wcove_typec_config = { .snk_pdo = snk_pdo, .nr_snk_pdo = ARRAY_SIZE(snk_pdo), - .max_snk_mv = 12000, - .max_snk_ma = 3000, - .max_snk_mw = 36000, .operating_snk_mw = 15000, .type = TYPEC_PORT_DRP, -- cgit v1.1 From e8374db15436648411d933b01d929acae0538775 Mon Sep 17 00:00:00 2001 From: Li Jun Date: Mon, 16 Apr 2018 14:54:37 +0800 Subject: usb: typec: tcpm: remove max_snk_mv/ma/mw Since there is no user of max_snk_*, so we can remove them from tcpm. Reviewed-by: Hans de Goede Signed-off-by: Li Jun Reviewed-by: Guenter Roeck Acked-by: Heikki Krogerus Signed-off-by: Greg Kroah-Hartman --- drivers/usb/typec/tcpm.c | 12 ------------ 1 file changed, 12 deletions(-) (limited to 'drivers/usb') diff --git a/drivers/usb/typec/tcpm.c b/drivers/usb/typec/tcpm.c index 048b953..27192083 100644 --- a/drivers/usb/typec/tcpm.c +++ b/drivers/usb/typec/tcpm.c @@ -257,9 +257,6 @@ struct tcpm_port { u32 snk_vdo[VDO_MAX_OBJECTS]; unsigned int nr_snk_vdo; - unsigned int max_snk_mv; - unsigned int max_snk_ma; - unsigned int max_snk_mw; unsigned int operating_snk_mw; /* Requested current / voltage */ @@ -3598,9 +3595,6 @@ EXPORT_SYMBOL_GPL(tcpm_update_source_capabilities); int tcpm_update_sink_capabilities(struct tcpm_port *port, const u32 *pdo, unsigned int nr_pdo, - unsigned int max_snk_mv, - unsigned int max_snk_ma, - unsigned int max_snk_mw, unsigned int operating_snk_mw) { if (tcpm_validate_caps(port, pdo, nr_pdo)) @@ -3608,9 +3602,6 @@ int tcpm_update_sink_capabilities(struct tcpm_port *port, const u32 *pdo, mutex_lock(&port->lock); port->nr_snk_pdo = tcpm_copy_pdos(port->snk_pdo, pdo, nr_pdo); - port->max_snk_mv = max_snk_mv; - port->max_snk_ma = max_snk_ma; - port->max_snk_mw = max_snk_mw; port->operating_snk_mw = operating_snk_mw; switch (port->state) { @@ -3676,9 +3667,6 @@ struct tcpm_port *tcpm_register_port(struct device *dev, struct tcpc_dev *tcpc) port->nr_snk_vdo = tcpm_copy_vdos(port->snk_vdo, tcpc->config->snk_vdo, tcpc->config->nr_snk_vdo); - port->max_snk_mv = tcpc->config->max_snk_mv; - port->max_snk_ma = tcpc->config->max_snk_ma; - port->max_snk_mw = tcpc->config->max_snk_mw; port->operating_snk_mw = tcpc->config->operating_snk_mw; if (!tcpc->config->try_role_hw) port->try_role = tcpc->config->default_role; -- cgit v1.1 From 3e29109f51a6b5662467358a8258ce67d2e915f7 Mon Sep 17 00:00:00 2001 From: Gregory CLEMENT Date: Thu, 19 Apr 2018 15:30:52 +0200 Subject: usb: host: xhci-plat: Remove useless test before clk_disable_unprepare clk_disable_unprepare() already checks that the clock pointer is valid. No need to test it before calling it. Signed-off-by: Gregory CLEMENT Signed-off-by: Greg Kroah-Hartman --- drivers/usb/host/xhci-plat.c | 6 ++---- 1 file changed, 2 insertions(+), 4 deletions(-) (limited to 'drivers/usb') diff --git a/drivers/usb/host/xhci-plat.c b/drivers/usb/host/xhci-plat.c index df327dc..f0231fe 100644 --- a/drivers/usb/host/xhci-plat.c +++ b/drivers/usb/host/xhci-plat.c @@ -320,8 +320,7 @@ put_usb3_hcd: usb_put_hcd(xhci->shared_hcd); disable_clk: - if (!IS_ERR(clk)) - clk_disable_unprepare(clk); + clk_disable_unprepare(clk); put_hcd: usb_put_hcd(hcd); @@ -347,8 +346,7 @@ static int xhci_plat_remove(struct platform_device *dev) usb_remove_hcd(hcd); usb_put_hcd(xhci->shared_hcd); - if (!IS_ERR(clk)) - clk_disable_unprepare(clk); + clk_disable_unprepare(clk); usb_put_hcd(hcd); pm_runtime_set_suspended(&dev->dev); -- cgit v1.1 From 0fd2060ad42726de387e0e78b3d34a3b7e47a6e1 Mon Sep 17 00:00:00 2001 From: Gregory CLEMENT Date: Thu, 19 Apr 2018 15:30:53 +0200 Subject: usb: host: xhci-plat: Fix clock resource by adding a register clock On Armada 7K/8K we need to explicitly enable the register clock. This clock is optional because not all the SoCs using this IP need it but at least for Armada 7K/8K it is actually mandatory. The change was done at xhci-plat level and not at a xhci-mvebu.c because, it is expected that other SoC would have this kind of constraint. The binding documentation is updating accordingly. Signed-off-by: Gregory CLEMENT Signed-off-by: Greg Kroah-Hartman --- drivers/usb/host/xhci-plat.c | 25 +++++++++++++++++++++---- drivers/usb/host/xhci.h | 3 ++- 2 files changed, 23 insertions(+), 5 deletions(-) (limited to 'drivers/usb') diff --git a/drivers/usb/host/xhci-plat.c b/drivers/usb/host/xhci-plat.c index f0231fe..596e7a7 100644 --- a/drivers/usb/host/xhci-plat.c +++ b/drivers/usb/host/xhci-plat.c @@ -157,6 +157,7 @@ static int xhci_plat_probe(struct platform_device *pdev) struct resource *res; struct usb_hcd *hcd; struct clk *clk; + struct clk *reg_clk; int ret; int irq; @@ -226,17 +227,27 @@ static int xhci_plat_probe(struct platform_device *pdev) hcd->rsrc_len = resource_size(res); /* - * Not all platforms have a clk so it is not an error if the - * clock does not exists. + * Not all platforms have clks so it is not an error if the + * clock do not exist. */ + reg_clk = devm_clk_get(&pdev->dev, "reg"); + if (!IS_ERR(reg_clk)) { + ret = clk_prepare_enable(reg_clk); + if (ret) + goto put_hcd; + } else if (PTR_ERR(reg_clk) == -EPROBE_DEFER) { + ret = -EPROBE_DEFER; + goto put_hcd; + } + clk = devm_clk_get(&pdev->dev, NULL); if (!IS_ERR(clk)) { ret = clk_prepare_enable(clk); if (ret) - goto put_hcd; + goto disable_reg_clk; } else if (PTR_ERR(clk) == -EPROBE_DEFER) { ret = -EPROBE_DEFER; - goto put_hcd; + goto disable_reg_clk; } xhci = hcd_to_xhci(hcd); @@ -252,6 +263,7 @@ static int xhci_plat_probe(struct platform_device *pdev) device_wakeup_enable(hcd->self.controller); xhci->clk = clk; + xhci->reg_clk = reg_clk; xhci->main_hcd = hcd; xhci->shared_hcd = __usb_create_hcd(driver, sysdev, &pdev->dev, dev_name(&pdev->dev), hcd); @@ -322,6 +334,9 @@ put_usb3_hcd: disable_clk: clk_disable_unprepare(clk); +disable_reg_clk: + clk_disable_unprepare(reg_clk); + put_hcd: usb_put_hcd(hcd); @@ -337,6 +352,7 @@ static int xhci_plat_remove(struct platform_device *dev) struct usb_hcd *hcd = platform_get_drvdata(dev); struct xhci_hcd *xhci = hcd_to_xhci(hcd); struct clk *clk = xhci->clk; + struct clk *reg_clk = xhci->reg_clk; xhci->xhc_state |= XHCI_STATE_REMOVING; @@ -347,6 +363,7 @@ static int xhci_plat_remove(struct platform_device *dev) usb_put_hcd(xhci->shared_hcd); clk_disable_unprepare(clk); + clk_disable_unprepare(reg_clk); usb_put_hcd(hcd); pm_runtime_set_suspended(&dev->dev); diff --git a/drivers/usb/host/xhci.h b/drivers/usb/host/xhci.h index 05c909b..6dfc486 100644 --- a/drivers/usb/host/xhci.h +++ b/drivers/usb/host/xhci.h @@ -1729,8 +1729,9 @@ struct xhci_hcd { int page_shift; /* msi-x vectors */ int msix_count; - /* optional clock */ + /* optional clocks */ struct clk *clk; + struct clk *reg_clk; /* data structures */ struct xhci_device_context_array *dcbaa; struct xhci_ring *cmd_ring; -- cgit v1.1 From ffe95371d2a84f3ad8085656d4fcb2fc926ff7a1 Mon Sep 17 00:00:00 2001 From: Mathias Nyman Date: Thu, 19 Apr 2018 19:05:50 +0300 Subject: usb: define HCD_USB32 speed option for hosts that support USB 3.2 dual-lane Hosts that support USB 3.2 Enhaned SuperSpeed can set their hcd speed to HCD_USB32 to let usb core and host drivers know that the controller supports new USB 3.2 dual-lane features. make sure usb core handle HCD_USB32 hosts correctly, for now similar to HCD_USB32. Signed-off-by: Mathias Nyman Signed-off-by: Greg Kroah-Hartman --- drivers/usb/core/hcd.c | 3 +++ 1 file changed, 3 insertions(+) (limited to 'drivers/usb') diff --git a/drivers/usb/core/hcd.c b/drivers/usb/core/hcd.c index 6241d32..5a799f8 100644 --- a/drivers/usb/core/hcd.c +++ b/drivers/usb/core/hcd.c @@ -567,6 +567,7 @@ static int rh_call_control (struct usb_hcd *hcd, struct urb *urb) switch (wValue & 0xff00) { case USB_DT_DEVICE << 8: switch (hcd->speed) { + case HCD_USB32: case HCD_USB31: bufp = usb31_rh_dev_descriptor; break; @@ -591,6 +592,7 @@ static int rh_call_control (struct usb_hcd *hcd, struct urb *urb) break; case USB_DT_CONFIG << 8: switch (hcd->speed) { + case HCD_USB32: case HCD_USB31: case HCD_USB3: bufp = ss_rh_config_descriptor; @@ -2804,6 +2806,7 @@ int usb_add_hcd(struct usb_hcd *hcd, case HCD_USB3: rhdev->speed = USB_SPEED_SUPER; break; + case HCD_USB32: case HCD_USB31: rhdev->speed = USB_SPEED_SUPER_PLUS; break; -- cgit v1.1 From 013eedb8c56e55549c45df19ca56a029cc804028 Mon Sep 17 00:00:00 2001 From: Mathias Nyman Date: Thu, 19 Apr 2018 19:05:51 +0300 Subject: USB: Add support to store lane count used by USB 3.2 USB 3.2 specification adds Dual-lane support, doubling the maximum SuperSpeedPlus data rate from 10Gbps to 20Gbps. Dual-lane takes into use a second set of rx and tx wires/pins in the Type-C cable and connector. Add "rx_lanes" and "tx_lanes" variables to struct usb_device to store the numer of lanes in use. Number of lanes can be read using the extended port status hub request that was introduced in USB 3.1. Extended port status rx and tx lane count are zero based, maximum lanes supported by non inter-chip (SSIC) USB 3.2 is 2 (dual lane) with rx and tx lane count symmetric. SSIC devices support asymmetric lanes up to 4 lanes per direction. If extended port status is not available then default to one lane. Signed-off-by: Mathias Nyman Signed-off-by: Greg Kroah-Hartman --- drivers/usb/core/hub.c | 8 ++++++++ 1 file changed, 8 insertions(+) (limited to 'drivers/usb') diff --git a/drivers/usb/core/hub.c b/drivers/usb/core/hub.c index 9e79bcf..e21cc3b 100644 --- a/drivers/usb/core/hub.c +++ b/drivers/usb/core/hub.c @@ -2746,6 +2746,14 @@ static int hub_port_wait_reset(struct usb_hub *hub, int port1, if (!udev) return 0; + if (hub_is_superspeedplus(hub->hdev)) { + /* extended portstatus Rx and Tx lane count are zero based */ + udev->rx_lanes = USB_EXT_PORT_RX_LANES(ext_portstatus) + 1; + udev->tx_lanes = USB_EXT_PORT_TX_LANES(ext_portstatus) + 1; + } else { + udev->rx_lanes = 1; + udev->tx_lanes = 1; + } if (hub_is_wusb(hub)) udev->speed = USB_SPEED_WIRELESS; else if (hub_is_superspeedplus(hub->hdev) && -- cgit v1.1 From a2d49572e11ef54f854f6b7db48846286b1676d5 Mon Sep 17 00:00:00 2001 From: Mathias Nyman Date: Thu, 19 Apr 2018 19:05:52 +0300 Subject: usb: set root hub lane counts Set the the rx_lane and tx_lane count to "2" for USB 3.2 hosts. For all other older hosts set the default lane counts to 1 Signed-off-by: Mathias Nyman Signed-off-by: Greg Kroah-Hartman --- drivers/usb/core/hcd.c | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'drivers/usb') diff --git a/drivers/usb/core/hcd.c b/drivers/usb/core/hcd.c index 5a799f8..ac5bcf4 100644 --- a/drivers/usb/core/hcd.c +++ b/drivers/usb/core/hcd.c @@ -2793,6 +2793,9 @@ int usb_add_hcd(struct usb_hcd *hcd, hcd->self.root_hub = rhdev; mutex_unlock(&usb_port_peer_mutex); + rhdev->rx_lanes = 1; + rhdev->tx_lanes = 1; + switch (hcd->speed) { case HCD_USB11: rhdev->speed = USB_SPEED_FULL; @@ -2807,6 +2810,8 @@ int usb_add_hcd(struct usb_hcd *hcd, rhdev->speed = USB_SPEED_SUPER; break; case HCD_USB32: + rhdev->rx_lanes = 2; + rhdev->tx_lanes = 2; case HCD_USB31: rhdev->speed = USB_SPEED_SUPER_PLUS; break; -- cgit v1.1 From 45455e4d7a6b767497f282bbd0146e838862291f Mon Sep 17 00:00:00 2001 From: Mathias Nyman Date: Thu, 19 Apr 2018 19:05:53 +0300 Subject: USB: show USB 3.2 Dual-lane devices as Gen Xx2 during device enumeration USB 3.2 specification adds a Gen XxY notion for USB3 devices where X is the signaling rate on the wire. Gen 1xY is 5Gbps Superspeed and Gen 2xY is 10Gbps SuperSpeedPlus. Y is the lane count. For normal, non inter-chip (SSIC) devies the rx and tx lane count is symmetric, and the maximum lane count for USB 3.2 devices is 2 (dual-lane). SSIC devices may have asymmetric lane counts, with up to four lanes per direction. The USB 3.2 specification doesn't point out how to use the Gen XxY notion for these devices, so we limit the Gen Xx2 notion to symmertic Dual lane devies. For other devices just show Gen1 or Gen2 Gen 1 5Gbps Gen 2 10Gbps Gen 1x2 10Gbps Dual-lane (USB 3.2) Gen 2x2 20Gbps Dual-lane (USB 3.2) Signed-off-by: Mathias Nyman Signed-off-by: Greg Kroah-Hartman --- drivers/usb/core/hub.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) (limited to 'drivers/usb') diff --git a/drivers/usb/core/hub.c b/drivers/usb/core/hub.c index e21cc3b..9237859 100644 --- a/drivers/usb/core/hub.c +++ b/drivers/usb/core/hub.c @@ -4602,9 +4602,12 @@ hub_port_init(struct usb_hub *hub, struct usb_device *udev, int port1, if (udev->speed >= USB_SPEED_SUPER) { devnum = udev->devnum; dev_info(&udev->dev, - "%s SuperSpeed%s USB device number %d using %s\n", + "%s SuperSpeed%s%s USB device number %d using %s\n", (udev->config) ? "reset" : "new", - (udev->speed == USB_SPEED_SUPER_PLUS) ? "Plus" : "", + (udev->speed == USB_SPEED_SUPER_PLUS) ? + "Plus Gen 2" : " Gen 1", + (udev->rx_lanes == 2 && udev->tx_lanes == 2) ? + "x2" : "", devnum, driver_name); } -- cgit v1.1 From 460fd21618bf95a16b30500eb4b5452dab04e023 Mon Sep 17 00:00:00 2001 From: Mathias Nyman Date: Thu, 19 Apr 2018 19:05:54 +0300 Subject: USB: USB 3.2 Add sysfs entries for a usb device rx_lanes and tx_lanes Add rx_lanes and tx_lanes lane count sysfs entries for a usb device struct usb_devuce rx_lanes and tx_lanes variables. Shows number of lanes used by the usb device Data rate of a device is the lane speed * lane count, for example USB 3.2 Gen 2x2 device uses 10Gbps signaling per lane, and has dual-lane support 10Gbps * 2 = 20Gbps Signed-off-by: Mathias Nyman Signed-off-by: Greg Kroah-Hartman --- drivers/usb/core/sysfs.c | 22 ++++++++++++++++++++++ 1 file changed, 22 insertions(+) (limited to 'drivers/usb') diff --git a/drivers/usb/core/sysfs.c b/drivers/usb/core/sysfs.c index 27bb340..ea18284 100644 --- a/drivers/usb/core/sysfs.c +++ b/drivers/usb/core/sysfs.c @@ -175,6 +175,26 @@ static ssize_t speed_show(struct device *dev, struct device_attribute *attr, } static DEVICE_ATTR_RO(speed); +static ssize_t rx_lanes_show(struct device *dev, struct device_attribute *attr, + char *buf) +{ + struct usb_device *udev; + + udev = to_usb_device(dev); + return sprintf(buf, "%d\n", udev->rx_lanes); +} +static DEVICE_ATTR_RO(rx_lanes); + +static ssize_t tx_lanes_show(struct device *dev, struct device_attribute *attr, + char *buf) +{ + struct usb_device *udev; + + udev = to_usb_device(dev); + return sprintf(buf, "%d\n", udev->tx_lanes); +} +static DEVICE_ATTR_RO(tx_lanes); + static ssize_t busnum_show(struct device *dev, struct device_attribute *attr, char *buf) { @@ -790,6 +810,8 @@ static struct attribute *dev_attrs[] = { &dev_attr_bNumConfigurations.attr, &dev_attr_bMaxPacketSize0.attr, &dev_attr_speed.attr, + &dev_attr_rx_lanes.attr, + &dev_attr_tx_lanes.attr, &dev_attr_busnum.attr, &dev_attr_devnum.attr, &dev_attr_devpath.attr, -- cgit v1.1 From f59cd940051459f04eb5cbdf07cab27d628439cf Mon Sep 17 00:00:00 2001 From: Dmitry Osipenko Date: Tue, 10 Apr 2018 01:02:57 +0300 Subject: usb: phy: tegra: Cleanup error messages Tegra's PHY driver has a mix of pr_err() and dev_err(), let's switch to dev_err() and use common errors message formatting across the driver for consistency. Signed-off-by: Dmitry Osipenko Signed-off-by: Greg Kroah-Hartman --- drivers/usb/phy/phy-tegra-usb.c | 69 ++++++++++++++++++++++++----------------- 1 file changed, 41 insertions(+), 28 deletions(-) (limited to 'drivers/usb') diff --git a/drivers/usb/phy/phy-tegra-usb.c b/drivers/usb/phy/phy-tegra-usb.c index 0e8d23e..e46219e 100644 --- a/drivers/usb/phy/phy-tegra-usb.c +++ b/drivers/usb/phy/phy-tegra-usb.c @@ -236,10 +236,14 @@ static void set_phcd(struct tegra_usb_phy *phy, bool enable) static int utmip_pad_open(struct tegra_usb_phy *phy) { + int err; + phy->pad_clk = devm_clk_get(phy->u_phy.dev, "utmi-pads"); if (IS_ERR(phy->pad_clk)) { - pr_err("%s: can't get utmip pad clock\n", __func__); - return PTR_ERR(phy->pad_clk); + err = PTR_ERR(phy->pad_clk); + dev_err(phy->u_phy.dev, + "Failed to get UTMIP pad clock: %d\n", err); + return err; } return 0; @@ -282,7 +286,7 @@ static int utmip_pad_power_off(struct tegra_usb_phy *phy) void __iomem *base = phy->pad_regs; if (!utmip_pad_count) { - pr_err("%s: utmip pad already powered off\n", __func__); + dev_err(phy->u_phy.dev, "UTMIP pad already powered off\n"); return -EINVAL; } @@ -338,7 +342,8 @@ static void utmi_phy_clk_disable(struct tegra_usb_phy *phy) set_phcd(phy, true); if (utmi_wait_register(base + USB_SUSP_CTRL, USB_PHY_CLK_VALID, 0) < 0) - pr_err("%s: timeout waiting for phy to stabilize\n", __func__); + dev_err(phy->u_phy.dev, + "Timeout waiting for PHY to stabilize on disable\n"); } static void utmi_phy_clk_enable(struct tegra_usb_phy *phy) @@ -370,7 +375,8 @@ static void utmi_phy_clk_enable(struct tegra_usb_phy *phy) if (utmi_wait_register(base + USB_SUSP_CTRL, USB_PHY_CLK_VALID, USB_PHY_CLK_VALID)) - pr_err("%s: timeout waiting for phy to stabilize\n", __func__); + dev_err(phy->u_phy.dev, + "Timeout waiting for PHY to stabilize on enable\n"); } static int utmi_phy_power_on(struct tegra_usb_phy *phy) @@ -617,15 +623,15 @@ static int ulpi_phy_power_on(struct tegra_usb_phy *phy) ret = gpio_direction_output(phy->reset_gpio, 0); if (ret < 0) { - dev_err(phy->u_phy.dev, "gpio %d not set to 0\n", - phy->reset_gpio); + dev_err(phy->u_phy.dev, "GPIO %d not set to 0: %d\n", + phy->reset_gpio, ret); return ret; } msleep(5); ret = gpio_direction_output(phy->reset_gpio, 1); if (ret < 0) { - dev_err(phy->u_phy.dev, "gpio %d not set to 1\n", - phy->reset_gpio); + dev_err(phy->u_phy.dev, "GPIO %d not set to 1: %d\n", + phy->reset_gpio, ret); return ret; } @@ -661,13 +667,13 @@ static int ulpi_phy_power_on(struct tegra_usb_phy *phy) /* Fix VbusInvalid due to floating VBUS */ ret = usb_phy_io_write(phy->ulpi, 0x40, 0x08); if (ret) { - pr_err("%s: ulpi write failed\n", __func__); + dev_err(phy->u_phy.dev, "ULPI write failed: %d\n", ret); return ret; } ret = usb_phy_io_write(phy->ulpi, 0x80, 0x0B); if (ret) { - pr_err("%s: ulpi write failed\n", __func__); + dev_err(phy->u_phy.dev, "ULPI write failed: %d\n", ret); return ret; } @@ -728,28 +734,30 @@ static int ulpi_open(struct tegra_usb_phy *phy) phy->clk = devm_clk_get(phy->u_phy.dev, "ulpi-link"); if (IS_ERR(phy->clk)) { - pr_err("%s: can't get ulpi clock\n", __func__); - return PTR_ERR(phy->clk); + err = PTR_ERR(phy->clk); + dev_err(phy->u_phy.dev, "Failed to get ULPI clock: %d\n", err); + return err; } err = devm_gpio_request(phy->u_phy.dev, phy->reset_gpio, "ulpi_phy_reset_b"); if (err < 0) { - dev_err(phy->u_phy.dev, "request failed for gpio: %d\n", - phy->reset_gpio); + dev_err(phy->u_phy.dev, "Request failed for GPIO %d: %d\n", + phy->reset_gpio, err); return err; } err = gpio_direction_output(phy->reset_gpio, 0); if (err < 0) { - dev_err(phy->u_phy.dev, "gpio %d direction not set to output\n", - phy->reset_gpio); + dev_err(phy->u_phy.dev, + "GPIO %d direction not set to output: %d\n", + phy->reset_gpio, err); return err; } phy->ulpi = otg_ulpi_create(&ulpi_viewport_access_ops, 0); if (!phy->ulpi) { - dev_err(phy->u_phy.dev, "otg_ulpi_create returned NULL\n"); + dev_err(phy->u_phy.dev, "Failed to create ULPI OTG\n"); err = -ENOMEM; return err; } @@ -766,8 +774,10 @@ static int tegra_usb_phy_init(struct tegra_usb_phy *phy) phy->pll_u = devm_clk_get(phy->u_phy.dev, "pll_u"); if (IS_ERR(phy->pll_u)) { - pr_err("Can't get pll_u clock\n"); - return PTR_ERR(phy->pll_u); + err = PTR_ERR(phy->pll_u); + dev_err(phy->u_phy.dev, + "Failed to get pll_u clock: %d\n", err); + return err; } err = clk_prepare_enable(phy->pll_u); @@ -782,7 +792,8 @@ static int tegra_usb_phy_init(struct tegra_usb_phy *phy) } } if (!phy->freq) { - pr_err("invalid pll_u parent rate %ld\n", parent_rate); + dev_err(phy->u_phy.dev, "Invalid pll_u parent rate %ld\n", + parent_rate); err = -EINVAL; goto fail; } @@ -791,7 +802,7 @@ static int tegra_usb_phy_init(struct tegra_usb_phy *phy) err = regulator_enable(phy->vbus); if (err) { dev_err(phy->u_phy.dev, - "failed to enable usb vbus regulator: %d\n", + "Failed to enable USB VBUS regulator: %d\n", err); goto fail; } @@ -855,7 +866,8 @@ static int read_utmi_param(struct platform_device *pdev, const char *param, int err = of_property_read_u32(pdev->dev.of_node, param, &value); *dest = (u8)value; if (err < 0) - dev_err(&pdev->dev, "Failed to read USB UTMI parameter %s: %d\n", + dev_err(&pdev->dev, + "Failed to read USB UTMI parameter %s: %d\n", param, err); return err; } @@ -871,14 +883,14 @@ static int utmi_phy_probe(struct tegra_usb_phy *tegra_phy, res = platform_get_resource(pdev, IORESOURCE_MEM, 1); if (!res) { - dev_err(&pdev->dev, "Failed to get UTMI Pad regs\n"); + dev_err(&pdev->dev, "Failed to get UTMI pad regs\n"); return -ENXIO; } tegra_phy->pad_regs = devm_ioremap(&pdev->dev, res->start, resource_size(res)); if (!tegra_phy->pad_regs) { - dev_err(&pdev->dev, "Failed to remap UTMI Pad regs\n"); + dev_err(&pdev->dev, "Failed to remap UTMI pad regs\n"); return -ENOMEM; } @@ -1020,15 +1032,16 @@ static int tegra_usb_phy_probe(struct platform_device *pdev) tegra_phy->reset_gpio = of_get_named_gpio(np, "nvidia,phy-reset-gpio", 0); if (!gpio_is_valid(tegra_phy->reset_gpio)) { - dev_err(&pdev->dev, "invalid gpio: %d\n", - tegra_phy->reset_gpio); + dev_err(&pdev->dev, + "Invalid GPIO: %d\n", tegra_phy->reset_gpio); return tegra_phy->reset_gpio; } tegra_phy->config = NULL; break; default: - dev_err(&pdev->dev, "phy_type is invalid or unsupported\n"); + dev_err(&pdev->dev, "phy_type %u is invalid or unsupported\n", + phy_type); return -EINVAL; } -- cgit v1.1 From 143470368efd3f0fb4cbe81aa89f49de8048d8a9 Mon Sep 17 00:00:00 2001 From: Dmitry Osipenko Date: Tue, 10 Apr 2018 01:02:58 +0300 Subject: usb: tegra: Move utmi-pads reset from ehci-tegra to tegra-phy UTMI pads are shared by USB controllers and reset of UTMI pads is shared with the reset of USB1 controller. Currently reset of UTMI pads is done by the EHCI driver and ChipIdea UDC works because EHCI driver always happen to be probed first. Move reset controls from ehci-tegra to tegra-phy in order to resolve the problem. Signed-off-by: Dmitry Osipenko Signed-off-by: Greg Kroah-Hartman --- drivers/usb/host/ehci-tegra.c | 87 ++++++++++++++++++----------------------- drivers/usb/phy/phy-tegra-usb.c | 79 ++++++++++++++++++++++++++++++++++--- 2 files changed, 113 insertions(+), 53 deletions(-) (limited to 'drivers/usb') diff --git a/drivers/usb/host/ehci-tegra.c b/drivers/usb/host/ehci-tegra.c index a6f4389..4d2cdec 100644 --- a/drivers/usb/host/ehci-tegra.c +++ b/drivers/usb/host/ehci-tegra.c @@ -36,7 +36,6 @@ #define DRV_NAME "tegra-ehci" static struct hc_driver __read_mostly tegra_ehci_hc_driver; -static bool usb1_reset_attempted; struct tegra_ehci_soc_config { bool has_hostpc; @@ -51,67 +50,54 @@ struct tegra_ehci_hcd { enum tegra_usb_phy_port_speed port_speed; }; -/* - * The 1st USB controller contains some UTMI pad registers that are global for - * all the controllers on the chip. Those registers are also cleared when - * reset is asserted to the 1st controller. This means that the 1st controller - * can only be reset when no other controlled has finished probing. So we'll - * reset the 1st controller before doing any other setup on any of the - * controllers, and then never again. - * - * Since this is a PHY issue, the Tegra PHY driver should probably be doing - * the resetting of the USB controllers. But to keep compatibility with old - * device trees that don't have reset phandles in the PHYs, do it here. - * Those old DTs will be vulnerable to total USB breakage if the 1st EHCI - * device isn't the first one to finish probing, so warn them. - */ static int tegra_reset_usb_controller(struct platform_device *pdev) { struct device_node *phy_np; struct usb_hcd *hcd = platform_get_drvdata(pdev); struct tegra_ehci_hcd *tegra = (struct tegra_ehci_hcd *)hcd_to_ehci(hcd)->priv; - bool has_utmi_pad_registers = false; + struct reset_control *rst; + int err; phy_np = of_parse_phandle(pdev->dev.of_node, "nvidia,phy", 0); if (!phy_np) return -ENOENT; - if (of_property_read_bool(phy_np, "nvidia,has-utmi-pad-registers")) - has_utmi_pad_registers = true; + /* + * The 1st USB controller contains some UTMI pad registers that are + * global for all the controllers on the chip. Those registers are + * also cleared when reset is asserted to the 1st controller. + */ + rst = of_reset_control_get_shared(phy_np, "utmi-pads"); + if (IS_ERR(rst)) { + dev_warn(&pdev->dev, + "can't get utmi-pads reset from the PHY\n"); + dev_warn(&pdev->dev, + "continuing, but please update your DT\n"); + } else { + /* + * PHY driver performs UTMI-pads reset in a case of + * non-legacy DT. + */ + reset_control_put(rst); + } - if (!usb1_reset_attempted) { - struct reset_control *usb1_reset; + of_node_put(phy_np); - if (!has_utmi_pad_registers) - usb1_reset = of_reset_control_get(phy_np, "utmi-pads"); - else - usb1_reset = tegra->rst; - - if (IS_ERR(usb1_reset)) { - dev_warn(&pdev->dev, - "can't get utmi-pads reset from the PHY\n"); - dev_warn(&pdev->dev, - "continuing, but please update your DT\n"); - } else { - reset_control_assert(usb1_reset); - udelay(1); - reset_control_deassert(usb1_reset); - - if (!has_utmi_pad_registers) - reset_control_put(usb1_reset); - } + /* reset control is shared, hence initialize it first */ + err = reset_control_deassert(tegra->rst); + if (err) + return err; - usb1_reset_attempted = true; - } + err = reset_control_assert(tegra->rst); + if (err) + return err; - if (!has_utmi_pad_registers) { - reset_control_assert(tegra->rst); - udelay(1); - reset_control_deassert(tegra->rst); - } + udelay(1); - of_node_put(phy_np); + err = reset_control_deassert(tegra->rst); + if (err) + return err; return 0; } @@ -440,7 +426,7 @@ static int tegra_ehci_probe(struct platform_device *pdev) goto cleanup_hcd_create; } - tegra->rst = devm_reset_control_get(&pdev->dev, "usb"); + tegra->rst = devm_reset_control_get_shared(&pdev->dev, "usb"); if (IS_ERR(tegra->rst)) { dev_err(&pdev->dev, "Can't get ehci reset\n"); err = PTR_ERR(tegra->rst); @@ -452,8 +438,10 @@ static int tegra_ehci_probe(struct platform_device *pdev) goto cleanup_hcd_create; err = tegra_reset_usb_controller(pdev); - if (err) + if (err) { + dev_err(&pdev->dev, "Failed to reset controller\n"); goto cleanup_clk_en; + } u_phy = devm_usb_get_phy_by_phandle(&pdev->dev, "nvidia,phy", 0); if (IS_ERR(u_phy)) { @@ -538,6 +526,9 @@ static int tegra_ehci_remove(struct platform_device *pdev) usb_phy_shutdown(hcd->usb_phy); usb_remove_hcd(hcd); + reset_control_assert(tegra->rst); + udelay(1); + clk_disable_unprepare(tegra->clk); usb_put_hcd(hcd); diff --git a/drivers/usb/phy/phy-tegra-usb.c b/drivers/usb/phy/phy-tegra-usb.c index e46219e..ea7ef1d 100644 --- a/drivers/usb/phy/phy-tegra-usb.c +++ b/drivers/usb/phy/phy-tegra-usb.c @@ -236,17 +236,83 @@ static void set_phcd(struct tegra_usb_phy *phy, bool enable) static int utmip_pad_open(struct tegra_usb_phy *phy) { - int err; + int ret; phy->pad_clk = devm_clk_get(phy->u_phy.dev, "utmi-pads"); if (IS_ERR(phy->pad_clk)) { - err = PTR_ERR(phy->pad_clk); + ret = PTR_ERR(phy->pad_clk); dev_err(phy->u_phy.dev, - "Failed to get UTMIP pad clock: %d\n", err); - return err; + "Failed to get UTMIP pad clock: %d\n", ret); + return ret; } - return 0; + phy->pad_rst = devm_reset_control_get_optional_shared( + phy->u_phy.dev, "utmi-pads"); + if (IS_ERR(phy->pad_rst)) { + ret = PTR_ERR(phy->pad_rst); + dev_err(phy->u_phy.dev, + "Failed to get UTMI-pads reset: %d\n", ret); + return ret; + } + + ret = clk_prepare_enable(phy->pad_clk); + if (ret) { + dev_err(phy->u_phy.dev, + "Failed to enable UTMI-pads clock: %d\n", ret); + return ret; + } + + spin_lock(&utmip_pad_lock); + + ret = reset_control_deassert(phy->pad_rst); + if (ret) { + dev_err(phy->u_phy.dev, + "Failed to initialize UTMI-pads reset: %d\n", ret); + goto unlock; + } + + ret = reset_control_assert(phy->pad_rst); + if (ret) { + dev_err(phy->u_phy.dev, + "Failed to assert UTMI-pads reset: %d\n", ret); + goto unlock; + } + + udelay(1); + + ret = reset_control_deassert(phy->pad_rst); + if (ret) + dev_err(phy->u_phy.dev, + "Failed to deassert UTMI-pads reset: %d\n", ret); +unlock: + spin_unlock(&utmip_pad_lock); + + clk_disable_unprepare(phy->pad_clk); + + return ret; +} + +static int utmip_pad_close(struct tegra_usb_phy *phy) +{ + int ret; + + ret = clk_prepare_enable(phy->pad_clk); + if (ret) { + dev_err(phy->u_phy.dev, + "Failed to enable UTMI-pads clock: %d\n", ret); + return ret; + } + + ret = reset_control_assert(phy->pad_rst); + if (ret) + dev_err(phy->u_phy.dev, + "Failed to assert UTMI-pads reset: %d\n", ret); + + udelay(1); + + clk_disable_unprepare(phy->pad_clk); + + return ret; } static void utmip_pad_power_on(struct tegra_usb_phy *phy) @@ -700,6 +766,9 @@ static void tegra_usb_phy_close(struct tegra_usb_phy *phy) if (!IS_ERR(phy->vbus)) regulator_disable(phy->vbus); + if (!phy->is_ulpi_phy) + utmip_pad_close(phy); + clk_disable_unprepare(phy->pll_u); } -- cgit v1.1 From ee30ec0cba81cf0a9a3a823a38573ca491efdf57 Mon Sep 17 00:00:00 2001 From: Dmitry Osipenko Date: Tue, 10 Apr 2018 01:02:59 +0300 Subject: usb: phy: Add Kconfig entry for Tegra PHY driver Tegra's EHCI driver has a build dependency on Tegra's PHY driver and currently Tegra's PHY driver is built only when Tegra's EHCI driver is built. Add own Kconfig entry for the Tegra's PHY driver so that drivers other than ehci-tegra (like ChipIdea UDC) could work with ehci-tegra driver being disabled in kernels config by allowing user to manually select the PHY driver. Signed-off-by: Dmitry Osipenko Signed-off-by: Greg Kroah-Hartman --- drivers/usb/host/Kconfig | 4 +--- drivers/usb/phy/Kconfig | 9 +++++++++ drivers/usb/phy/Makefile | 2 +- 3 files changed, 11 insertions(+), 4 deletions(-) (limited to 'drivers/usb') diff --git a/drivers/usb/host/Kconfig b/drivers/usb/host/Kconfig index 5d958da..9f0aeb0 100644 --- a/drivers/usb/host/Kconfig +++ b/drivers/usb/host/Kconfig @@ -234,9 +234,7 @@ config USB_EHCI_TEGRA tristate "NVIDIA Tegra HCD support" depends on ARCH_TEGRA select USB_EHCI_ROOT_HUB_TT - select USB_PHY - select USB_ULPI - select USB_ULPI_VIEWPORT + select USB_TEGRA_PHY help This driver enables support for the internal USB Host Controllers found in NVIDIA Tegra SoCs. The controllers are EHCI compliant. diff --git a/drivers/usb/phy/Kconfig b/drivers/usb/phy/Kconfig index 0f8ab98..b9b0a44 100644 --- a/drivers/usb/phy/Kconfig +++ b/drivers/usb/phy/Kconfig @@ -159,6 +159,15 @@ config USB_MXS_PHY MXS Phy is used by some of the i.MX SoCs, for example imx23/28/6x. +config USB_TEGRA_PHY + tristate "NVIDIA Tegra USB PHY Driver" + depends on ARCH_TEGRA + select USB_PHY + select USB_ULPI + help + This driver provides PHY support for the USB controllers found + on NVIDIA Tegra SoC's. + config USB_ULPI bool "Generic ULPI Transceiver Driver" depends on ARM || ARM64 diff --git a/drivers/usb/phy/Makefile b/drivers/usb/phy/Makefile index 25e579f..df1d990 100644 --- a/drivers/usb/phy/Makefile +++ b/drivers/usb/phy/Makefile @@ -16,7 +16,7 @@ obj-$(CONFIG_AM335X_CONTROL_USB) += phy-am335x-control.o obj-$(CONFIG_AM335X_PHY_USB) += phy-am335x.o obj-$(CONFIG_OMAP_OTG) += phy-omap-otg.o obj-$(CONFIG_TWL6030_USB) += phy-twl6030-usb.o -obj-$(CONFIG_USB_EHCI_TEGRA) += phy-tegra-usb.o +obj-$(CONFIG_USB_TEGRA_PHY) += phy-tegra-usb.o obj-$(CONFIG_USB_GPIO_VBUS) += phy-gpio-vbus-usb.o obj-$(CONFIG_USB_ISP1301) += phy-isp1301.o obj-$(CONFIG_USB_MV_OTG) += phy-mv-usb.o -- cgit v1.1 From 5d1332a8eabd8bd5b8c322d45542968ee6f113be Mon Sep 17 00:00:00 2001 From: Alan Stern Date: Tue, 27 Mar 2018 10:27:06 -0400 Subject: usb: gadget: udc: core: Document the relation between usb_ep_queue() and completion callback Improve the kerneldoc for usb_ep_queue() to note explicitly that the request's completion routine will be called if and only if the return value is 0. The corresponding fact about usb_submit_urb() for the host-side API has long been documented, and this has always been the intention for the gadget API. But until now, documentation seems to have been lacking. Signed-off-by: Alan Stern Signed-off-by: Felipe Balbi --- drivers/usb/gadget/udc/core.c | 6 ++++++ 1 file changed, 6 insertions(+) (limited to 'drivers/usb') diff --git a/drivers/usb/gadget/udc/core.c b/drivers/usb/gadget/udc/core.c index 842814b..cab5e4f 100644 --- a/drivers/usb/gadget/udc/core.c +++ b/drivers/usb/gadget/udc/core.c @@ -244,6 +244,12 @@ EXPORT_SYMBOL_GPL(usb_ep_free_request); * Returns zero, or a negative error code. Endpoints that are not enabled * report errors; errors will also be * reported when the usb peripheral is disconnected. + * + * If and only if @req is successfully queued (the return value is zero), + * @req->complete() will be called exactly once, when the Gadget core and + * UDC are finished with the request. When the completion function is called, + * control of the request is returned to the device driver which submitted it. + * The completion handler may then immediately free or reuse @req. */ int usb_ep_queue(struct usb_ep *ep, struct usb_request *req, gfp_t gfp_flags) -- cgit v1.1 From 3f0989e4d366b5affc222f01d2b6273258171946 Mon Sep 17 00:00:00 2001 From: "Gustavo A. R. Silva" Date: Mon, 23 Apr 2018 07:14:53 -0500 Subject: usb: core: hcd: mark expected switch fall-through In preparation to enabling -Wimplicit-fallthrough, mark switch cases where we are expecting to fall through. Addresses-Coverity-ID: 1468266 ("Missing break in switch") Signed-off-by: Gustavo A. R. Silva Signed-off-by: Greg Kroah-Hartman --- drivers/usb/core/hcd.c | 1 + 1 file changed, 1 insertion(+) (limited to 'drivers/usb') diff --git a/drivers/usb/core/hcd.c b/drivers/usb/core/hcd.c index ac5bcf4..f65c1f2 100644 --- a/drivers/usb/core/hcd.c +++ b/drivers/usb/core/hcd.c @@ -2812,6 +2812,7 @@ int usb_add_hcd(struct usb_hcd *hcd, case HCD_USB32: rhdev->rx_lanes = 2; rhdev->tx_lanes = 2; + /* fall through */ case HCD_USB31: rhdev->speed = USB_SPEED_SUPER_PLUS; break; -- cgit v1.1 From 6e01827ed93947895680fbdad68c072a0f4e2450 Mon Sep 17 00:00:00 2001 From: Maxim Moseychuk Date: Thu, 4 Jan 2018 21:43:03 +0300 Subject: usb: do not reset if a low-speed or full-speed device timed out Some low-speed and full-speed devices (for example, bluetooth) do not have time to initialize. For them, ETIMEDOUT is a valid error. We need to give them another try. Otherwise, they will never be initialized correctly and in dmesg will be messages "Bluetooth: hci0 command 0x1002 tx timeout" or similars. Fixes: 264904ccc33c ("usb: retry reset if a device times out") Cc: stable Signed-off-by: Maxim Moseychuk Signed-off-by: Greg Kroah-Hartman --- drivers/usb/core/hub.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) (limited to 'drivers/usb') diff --git a/drivers/usb/core/hub.c b/drivers/usb/core/hub.c index 9237859..a865917 100644 --- a/drivers/usb/core/hub.c +++ b/drivers/usb/core/hub.c @@ -4555,7 +4555,9 @@ hub_port_init(struct usb_hub *hub, struct usb_device *udev, int port1, * reset. But only on the first attempt, * lest we get into a time out/reset loop */ - if (r == 0 || (r == -ETIMEDOUT && retries == 0)) + if (r == 0 || (r == -ETIMEDOUT && + retries == 0 && + udev->speed > USB_SPEED_FULL)) break; } udev->descriptor.bMaxPacketSize0 = -- cgit v1.1 From 2eadc33f40d4c59dd0649f8b6958872d85ad05d7 Mon Sep 17 00:00:00 2001 From: Adam Thomson Date: Mon, 23 Apr 2018 15:10:56 +0100 Subject: typec: tcpm: Add core support for sink side PPS This commit adds code to handle requesting of PPS APDOs. Switching between standard PDOs and APDOs, and re-requesting an APDO to modify operating voltage/current will be triggered by an external call into TCPM. Signed-off-by: Adam Thomson Acked-by: Heikki Krogerus Reviewed-by: Guenter Roeck Signed-off-by: Greg Kroah-Hartman --- drivers/usb/typec/tcpm.c | 569 +++++++++++++++++++++++++++++++++++++++++++++-- 1 file changed, 555 insertions(+), 14 deletions(-) (limited to 'drivers/usb') diff --git a/drivers/usb/typec/tcpm.c b/drivers/usb/typec/tcpm.c index 27192083..b160da3 100644 --- a/drivers/usb/typec/tcpm.c +++ b/drivers/usb/typec/tcpm.c @@ -48,6 +48,7 @@ S(SNK_DISCOVERY_DEBOUNCE_DONE), \ S(SNK_WAIT_CAPABILITIES), \ S(SNK_NEGOTIATE_CAPABILITIES), \ + S(SNK_NEGOTIATE_PPS_CAPABILITIES), \ S(SNK_TRANSITION_SINK), \ S(SNK_TRANSITION_SINK_VBUS), \ S(SNK_READY), \ @@ -167,6 +168,16 @@ struct pd_mode_data { struct typec_altmode_desc altmode_desc[SVID_DISCOVERY_MAX]; }; +struct pd_pps_data { + u32 min_volt; + u32 max_volt; + u32 max_curr; + u32 out_volt; + u32 op_curr; + bool supported; + bool active; +}; + struct tcpm_port { struct device *dev; @@ -235,6 +246,7 @@ struct tcpm_port { struct completion swap_complete; int swap_status; + unsigned int negotiated_rev; unsigned int message_id; unsigned int caps_count; unsigned int hard_reset_count; @@ -258,6 +270,7 @@ struct tcpm_port { unsigned int nr_snk_vdo; unsigned int operating_snk_mw; + bool update_sink_caps; /* Requested current / voltage */ u32 current_limit; @@ -274,8 +287,13 @@ struct tcpm_port { /* VDO to retry if UFP responder replied busy */ u32 vdo_retry; - /* Alternate mode data */ + /* PPS */ + struct pd_pps_data pps_data; + struct completion pps_complete; + bool pps_pending; + int pps_status; + /* Alternate mode data */ struct pd_mode_data mode_data; struct typec_altmode *partner_altmode[SVID_DISCOVERY_MAX]; struct typec_altmode *port_altmode[SVID_DISCOVERY_MAX]; @@ -493,6 +511,16 @@ static void tcpm_log_source_caps(struct tcpm_port *port) pdo_max_voltage(pdo), pdo_max_power(pdo)); break; + case PDO_TYPE_APDO: + if (pdo_apdo_type(pdo) == APDO_TYPE_PPS) + scnprintf(msg, sizeof(msg), + "%u-%u mV, %u mA", + pdo_pps_apdo_min_voltage(pdo), + pdo_pps_apdo_max_voltage(pdo), + pdo_pps_apdo_max_current(pdo)); + else + strcpy(msg, "undefined APDO"); + break; default: strcpy(msg, "undefined"); break; @@ -790,11 +818,13 @@ static int tcpm_pd_send_source_caps(struct tcpm_port *port) msg.header = PD_HEADER_LE(PD_CTRL_REJECT, port->pwr_role, port->data_role, + port->negotiated_rev, port->message_id, 0); } else { msg.header = PD_HEADER_LE(PD_DATA_SOURCE_CAP, port->pwr_role, port->data_role, + port->negotiated_rev, port->message_id, port->nr_src_pdo); } @@ -815,11 +845,13 @@ static int tcpm_pd_send_sink_caps(struct tcpm_port *port) msg.header = PD_HEADER_LE(PD_CTRL_REJECT, port->pwr_role, port->data_role, + port->negotiated_rev, port->message_id, 0); } else { msg.header = PD_HEADER_LE(PD_DATA_SINK_CAP, port->pwr_role, port->data_role, + port->negotiated_rev, port->message_id, port->nr_snk_pdo); } @@ -1186,6 +1218,7 @@ static void vdm_run_state_machine(struct tcpm_port *port) msg.header = PD_HEADER_LE(PD_DATA_VENDOR_DEF, port->pwr_role, port->data_role, + port->negotiated_rev, port->message_id, port->vdo_count); for (i = 0; i < port->vdo_count; i++) msg.payload[i] = cpu_to_le32(port->vdo_data[i]); @@ -1257,6 +1290,8 @@ enum pdo_err { PDO_ERR_FIXED_NOT_SORTED, PDO_ERR_VARIABLE_BATT_NOT_SORTED, PDO_ERR_DUPE_PDO, + PDO_ERR_PPS_APDO_NOT_SORTED, + PDO_ERR_DUPE_PPS_APDO, }; static const char * const pdo_err_msg[] = { @@ -1272,6 +1307,10 @@ static const char * const pdo_err_msg[] = { " err: Variable/Battery supply pdos should be in increasing order of their minimum voltage", [PDO_ERR_DUPE_PDO] = " err: Variable/Batt supply pdos cannot have same min/max voltage", + [PDO_ERR_PPS_APDO_NOT_SORTED] = + " err: Programmable power supply apdos should be in increasing order of their maximum voltage", + [PDO_ERR_DUPE_PPS_APDO] = + " err: Programmable power supply apdos cannot have same min/max voltage and max current", }; static enum pdo_err tcpm_caps_err(struct tcpm_port *port, const u32 *pdo, @@ -1321,6 +1360,26 @@ static enum pdo_err tcpm_caps_err(struct tcpm_port *port, const u32 *pdo, pdo_min_voltage(pdo[i - 1]))) return PDO_ERR_DUPE_PDO; break; + /* + * The Programmable Power Supply APDOs, if present, + * shall be sent in Maximum Voltage order; + * lowest to highest. + */ + case PDO_TYPE_APDO: + if (pdo_apdo_type(pdo[i]) != APDO_TYPE_PPS) + break; + + if (pdo_pps_apdo_max_current(pdo[i]) < + pdo_pps_apdo_max_current(pdo[i - 1])) + return PDO_ERR_PPS_APDO_NOT_SORTED; + else if (pdo_pps_apdo_min_voltage(pdo[i]) == + pdo_pps_apdo_min_voltage(pdo[i - 1]) && + pdo_pps_apdo_max_voltage(pdo[i]) == + pdo_pps_apdo_max_voltage(pdo[i - 1]) && + pdo_pps_apdo_max_current(pdo[i]) == + pdo_pps_apdo_max_current(pdo[i - 1])) + return PDO_ERR_DUPE_PPS_APDO; + break; default: tcpm_log_force(port, " Unknown pdo type"); } @@ -1346,11 +1405,16 @@ static int tcpm_validate_caps(struct tcpm_port *port, const u32 *pdo, /* * PD (data, control) command handling functions */ + +static int tcpm_pd_send_control(struct tcpm_port *port, + enum pd_ctrl_msg_type type); + static void tcpm_pd_data_request(struct tcpm_port *port, const struct pd_message *msg) { enum pd_data_msg_type type = pd_header_type_le(msg->header); unsigned int cnt = pd_header_cnt_le(msg->header); + unsigned int rev = pd_header_rev_le(msg->header); unsigned int i; switch (type) { @@ -1369,6 +1433,17 @@ static void tcpm_pd_data_request(struct tcpm_port *port, port->nr_source_caps); /* + * Adjust revision in subsequent message headers, as required, + * to comply with 6.2.1.1.5 of the USB PD 3.0 spec. We don't + * support Rev 1.0 so just do nothing in that scenario. + */ + if (rev == PD_REV10) + break; + + if (rev < PD_MAX_REV) + port->negotiated_rev = rev; + + /* * This message may be received even if VBUS is not * present. This is quite unexpected; see USB PD * specification, sections 8.3.3.6.3.1 and 8.3.3.6.3.2. @@ -1389,6 +1464,20 @@ static void tcpm_pd_data_request(struct tcpm_port *port, tcpm_queue_message(port, PD_MSG_CTRL_REJECT); break; } + + /* + * Adjust revision in subsequent message headers, as required, + * to comply with 6.2.1.1.5 of the USB PD 3.0 spec. We don't + * support Rev 1.0 so just reject in that scenario. + */ + if (rev == PD_REV10) { + tcpm_queue_message(port, PD_MSG_CTRL_REJECT); + break; + } + + if (rev < PD_MAX_REV) + port->negotiated_rev = rev; + port->sink_request = le32_to_cpu(msg->payload[0]); tcpm_set_state(port, SRC_NEGOTIATE_CAPABILITIES, 0); break; @@ -1413,6 +1502,15 @@ static void tcpm_pd_data_request(struct tcpm_port *port, } } +static void tcpm_pps_complete(struct tcpm_port *port, int result) +{ + if (port->pps_pending) { + port->pps_status = result; + port->pps_pending = false; + complete(&port->pps_complete); + } +} + static void tcpm_pd_ctrl_request(struct tcpm_port *port, const struct pd_message *msg) { @@ -1489,6 +1587,14 @@ static void tcpm_pd_ctrl_request(struct tcpm_port *port, next_state = SNK_WAIT_CAPABILITIES; tcpm_set_state(port, next_state, 0); break; + case SNK_NEGOTIATE_PPS_CAPABILITIES: + /* Revert data back from any requested PPS updates */ + port->pps_data.out_volt = port->supply_voltage; + port->pps_data.op_curr = port->current_limit; + port->pps_status = (type == PD_CTRL_WAIT ? + -EAGAIN : -EOPNOTSUPP); + tcpm_set_state(port, SNK_READY, 0); + break; case DR_SWAP_SEND: port->swap_status = (type == PD_CTRL_WAIT ? -EAGAIN : -EOPNOTSUPP); @@ -1511,6 +1617,13 @@ static void tcpm_pd_ctrl_request(struct tcpm_port *port, case PD_CTRL_ACCEPT: switch (port->state) { case SNK_NEGOTIATE_CAPABILITIES: + port->pps_data.active = false; + tcpm_set_state(port, SNK_TRANSITION_SINK, 0); + break; + case SNK_NEGOTIATE_PPS_CAPABILITIES: + port->pps_data.active = true; + port->supply_voltage = port->pps_data.out_volt; + port->current_limit = port->pps_data.op_curr; tcpm_set_state(port, SNK_TRANSITION_SINK, 0); break; case SOFT_RESET_SEND: @@ -1665,6 +1778,7 @@ static int tcpm_pd_send_control(struct tcpm_port *port, memset(&msg, 0, sizeof(msg)); msg.header = PD_HEADER_LE(type, port->pwr_role, port->data_role, + port->negotiated_rev, port->message_id, 0); return tcpm_pd_transmit(port, TCPC_TX_SOP, &msg); @@ -1780,6 +1894,8 @@ static int tcpm_pd_select_pdo(struct tcpm_port *port, int *sink_pdo, min_snk_mv = 0; int ret = -EINVAL; + port->pps_data.supported = false; + /* * Select the source PDO providing the most power which has a * matchig sink cap. @@ -1788,30 +1904,59 @@ static int tcpm_pd_select_pdo(struct tcpm_port *port, int *sink_pdo, u32 pdo = port->source_caps[i]; enum pd_pdo_type type = pdo_type(pdo); - if (type == PDO_TYPE_FIXED) { + switch (type) { + case PDO_TYPE_FIXED: max_src_mv = pdo_fixed_voltage(pdo); min_src_mv = max_src_mv; - } else { + break; + case PDO_TYPE_BATT: + case PDO_TYPE_VAR: max_src_mv = pdo_max_voltage(pdo); min_src_mv = pdo_min_voltage(pdo); + break; + case PDO_TYPE_APDO: + if (pdo_apdo_type(pdo) == APDO_TYPE_PPS) + port->pps_data.supported = true; + continue; + default: + tcpm_log(port, "Invalid source PDO type, ignoring"); + continue; } - if (type == PDO_TYPE_BATT) { - src_mw = pdo_max_power(pdo); - } else { + switch (type) { + case PDO_TYPE_FIXED: + case PDO_TYPE_VAR: src_ma = pdo_max_current(pdo); src_mw = src_ma * min_src_mv / 1000; + break; + case PDO_TYPE_BATT: + src_mw = pdo_max_power(pdo); + break; + case PDO_TYPE_APDO: + continue; + default: + tcpm_log(port, "Invalid source PDO type, ignoring"); + continue; } for (j = 0; j < port->nr_snk_pdo; j++) { pdo = port->snk_pdo[j]; - if (pdo_type(pdo) == PDO_TYPE_FIXED) { - min_snk_mv = pdo_fixed_voltage(pdo); + switch (pdo_type(pdo)) { + case PDO_TYPE_FIXED: max_snk_mv = pdo_fixed_voltage(pdo); - } else { - min_snk_mv = pdo_min_voltage(pdo); + min_snk_mv = max_snk_mv; + break; + case PDO_TYPE_BATT: + case PDO_TYPE_VAR: max_snk_mv = pdo_max_voltage(pdo); + min_snk_mv = pdo_min_voltage(pdo); + break; + case PDO_TYPE_APDO: + continue; + default: + tcpm_log(port, "Invalid sink PDO type, ignoring"); + continue; } if (max_src_mv <= max_snk_mv && @@ -1832,6 +1977,103 @@ static int tcpm_pd_select_pdo(struct tcpm_port *port, int *sink_pdo, return ret; } +#define min_pps_apdo_current(x, y) \ + min(pdo_pps_apdo_max_current(x), pdo_pps_apdo_max_current(y)) + +static unsigned int tcpm_pd_select_pps_apdo(struct tcpm_port *port) +{ + unsigned int i, j, max_mw = 0, max_mv = 0; + unsigned int min_src_mv, max_src_mv, src_ma, src_mw; + unsigned int min_snk_mv, max_snk_mv, snk_ma; + u32 pdo; + unsigned int src_pdo = 0, snk_pdo = 0; + + /* + * Select the source PPS APDO providing the most power while staying + * within the board's limits. We skip the first PDO as this is always + * 5V 3A. + */ + for (i = 1; i < port->nr_source_caps; ++i) { + pdo = port->source_caps[i]; + + switch (pdo_type(pdo)) { + case PDO_TYPE_APDO: + if (pdo_apdo_type(pdo) != APDO_TYPE_PPS) { + tcpm_log(port, "Not PPS APDO (source), ignoring"); + continue; + } + + min_src_mv = pdo_pps_apdo_min_voltage(pdo); + max_src_mv = pdo_pps_apdo_max_voltage(pdo); + src_ma = pdo_pps_apdo_max_current(pdo); + src_mw = (src_ma * max_src_mv) / 1000; + + /* + * Now search through the sink PDOs to find a matching + * PPS APDO. Again skip the first sink PDO as this will + * always be 5V 3A. + */ + for (j = i; j < port->nr_snk_pdo; j++) { + pdo = port->snk_pdo[j]; + + switch (pdo_type(pdo)) { + case PDO_TYPE_APDO: + if (pdo_apdo_type(pdo) != APDO_TYPE_PPS) { + tcpm_log(port, + "Not PPS APDO (sink), ignoring"); + continue; + } + + min_snk_mv = + pdo_pps_apdo_min_voltage(pdo); + max_snk_mv = + pdo_pps_apdo_max_voltage(pdo); + snk_ma = + pdo_pps_apdo_max_current(pdo); + break; + default: + tcpm_log(port, + "Not APDO type (sink), ignoring"); + continue; + } + + if (max_src_mv <= max_snk_mv && + min_src_mv >= min_snk_mv) { + /* Prefer higher voltages if available */ + if ((src_mw == max_mw && + min_src_mv > max_mv) || + src_mw > max_mw) { + src_pdo = i; + snk_pdo = j; + max_mw = src_mw; + max_mv = max_src_mv; + } + } + } + + break; + default: + tcpm_log(port, "Not APDO type (source), ignoring"); + continue; + } + } + + if (src_pdo) { + pdo = port->source_caps[src_pdo]; + + port->pps_data.min_volt = pdo_pps_apdo_min_voltage(pdo); + port->pps_data.max_volt = pdo_pps_apdo_max_voltage(pdo); + port->pps_data.max_curr = + min_pps_apdo_current(pdo, port->snk_pdo[snk_pdo]); + port->pps_data.out_volt = + min(pdo_pps_apdo_max_voltage(pdo), port->pps_data.out_volt); + port->pps_data.op_curr = + min(port->pps_data.max_curr, port->pps_data.op_curr); + } + + return src_pdo; +} + static int tcpm_pd_build_request(struct tcpm_port *port, u32 *rdo) { unsigned int mv, ma, mw, flags; @@ -1849,10 +2091,18 @@ static int tcpm_pd_build_request(struct tcpm_port *port, u32 *rdo) matching_snk_pdo = port->snk_pdo[snk_pdo_index]; type = pdo_type(pdo); - if (type == PDO_TYPE_FIXED) + switch (type) { + case PDO_TYPE_FIXED: mv = pdo_fixed_voltage(pdo); - else + break; + case PDO_TYPE_BATT: + case PDO_TYPE_VAR: mv = pdo_min_voltage(pdo); + break; + default: + tcpm_log(port, "Invalid PDO selected!"); + return -EINVAL; + } /* Select maximum available current within the sink pdo's limit */ if (type == PDO_TYPE_BATT) { @@ -1917,6 +2167,105 @@ static int tcpm_pd_send_request(struct tcpm_port *port) msg.header = PD_HEADER_LE(PD_DATA_REQUEST, port->pwr_role, port->data_role, + port->negotiated_rev, + port->message_id, 1); + msg.payload[0] = cpu_to_le32(rdo); + + return tcpm_pd_transmit(port, TCPC_TX_SOP, &msg); +} + +static int tcpm_pd_build_pps_request(struct tcpm_port *port, u32 *rdo) +{ + unsigned int out_mv, op_ma, op_mw, min_mv, max_mv, max_ma, flags; + enum pd_pdo_type type; + unsigned int src_pdo_index; + u32 pdo; + + src_pdo_index = tcpm_pd_select_pps_apdo(port); + if (!src_pdo_index) + return -EOPNOTSUPP; + + pdo = port->source_caps[src_pdo_index]; + type = pdo_type(pdo); + + switch (type) { + case PDO_TYPE_APDO: + if (pdo_apdo_type(pdo) != APDO_TYPE_PPS) { + tcpm_log(port, "Invalid APDO selected!"); + return -EINVAL; + } + min_mv = port->pps_data.min_volt; + max_mv = port->pps_data.max_volt; + max_ma = port->pps_data.max_curr; + out_mv = port->pps_data.out_volt; + op_ma = port->pps_data.op_curr; + break; + default: + tcpm_log(port, "Invalid PDO selected!"); + return -EINVAL; + } + + flags = RDO_USB_COMM | RDO_NO_SUSPEND; + + op_mw = (op_ma * out_mv) / 1000; + if (op_mw < port->operating_snk_mw) { + /* + * Try raising current to meet power needs. If that's not enough + * then try upping the voltage. If that's still not enough + * then we've obviously chosen a PPS APDO which really isn't + * suitable so abandon ship. + */ + op_ma = (port->operating_snk_mw * 1000) / out_mv; + if ((port->operating_snk_mw * 1000) % out_mv) + ++op_ma; + op_ma += RDO_PROG_CURR_MA_STEP - (op_ma % RDO_PROG_CURR_MA_STEP); + + if (op_ma > max_ma) { + op_ma = max_ma; + out_mv = (port->operating_snk_mw * 1000) / op_ma; + if ((port->operating_snk_mw * 1000) % op_ma) + ++out_mv; + out_mv += RDO_PROG_VOLT_MV_STEP - + (out_mv % RDO_PROG_VOLT_MV_STEP); + + if (out_mv > max_mv) { + tcpm_log(port, "Invalid PPS APDO selected!"); + return -EINVAL; + } + } + } + + tcpm_log(port, "cc=%d cc1=%d cc2=%d vbus=%d vconn=%s polarity=%d", + port->cc_req, port->cc1, port->cc2, port->vbus_source, + port->vconn_role == TYPEC_SOURCE ? "source" : "sink", + port->polarity); + + *rdo = RDO_PROG(src_pdo_index + 1, out_mv, op_ma, flags); + + tcpm_log(port, "Requesting APDO %d: %u mV, %u mA", + src_pdo_index, out_mv, op_ma); + + port->pps_data.op_curr = op_ma; + port->pps_data.out_volt = out_mv; + + return 0; +} + +static int tcpm_pd_send_pps_request(struct tcpm_port *port) +{ + struct pd_message msg; + int ret; + u32 rdo; + + ret = tcpm_pd_build_pps_request(port, &rdo); + if (ret < 0) + return ret; + + memset(&msg, 0, sizeof(msg)); + msg.header = PD_HEADER_LE(PD_DATA_REQUEST, + port->pwr_role, + port->data_role, + port->negotiated_rev, port->message_id, 1); msg.payload[0] = cpu_to_le32(rdo); @@ -2103,6 +2452,7 @@ static void tcpm_reset_port(struct tcpm_port *port) tcpm_typec_disconnect(port); port->attached = false; port->pd_capable = false; + port->pps_data.supported = false; /* * First Rx ID should be 0; set this to a sentinel of -1 so that @@ -2120,6 +2470,8 @@ static void tcpm_reset_port(struct tcpm_port *port) tcpm_set_attached_state(port, false); port->try_src_count = 0; port->try_snk_count = 0; + port->supply_voltage = 0; + port->current_limit = 0; } static void tcpm_detach(struct tcpm_port *port) @@ -2364,6 +2716,7 @@ static void run_state_machine(struct tcpm_port *port) typec_set_pwr_opmode(port->typec_port, opmode); port->pwr_opmode = TYPEC_PWR_MODE_USB; port->caps_count = 0; + port->negotiated_rev = PD_MAX_REV; port->message_id = 0; port->rx_msgid = -1; port->explicit_contract = false; @@ -2424,6 +2777,7 @@ static void run_state_machine(struct tcpm_port *port) tcpm_swap_complete(port, 0); tcpm_typec_connect(port); + tcpm_check_send_discover(port); /* * 6.3.5 @@ -2447,6 +2801,7 @@ static void run_state_machine(struct tcpm_port *port) case SNK_UNATTACHED: if (!port->non_pd_role_swap) tcpm_swap_complete(port, -ENOTCONN); + tcpm_pps_complete(port, -ENOTCONN); tcpm_snk_detach(port); if (tcpm_start_drp_toggling(port)) { tcpm_set_state(port, DRP_TOGGLING, 0); @@ -2536,6 +2891,7 @@ static void run_state_machine(struct tcpm_port *port) port->cc2 : port->cc1); typec_set_pwr_opmode(port->typec_port, opmode); port->pwr_opmode = TYPEC_PWR_MODE_USB; + port->negotiated_rev = PD_MAX_REV; port->message_id = 0; port->rx_msgid = -1; port->explicit_contract = false; @@ -2606,6 +2962,24 @@ static void run_state_machine(struct tcpm_port *port) PD_T_SENDER_RESPONSE); } break; + case SNK_NEGOTIATE_PPS_CAPABILITIES: + ret = tcpm_pd_send_pps_request(port); + if (ret < 0) { + port->pps_status = ret; + /* + * If this was called due to updates to sink + * capabilities, and pps is no longer valid, we should + * safely fall back to a standard PDO. + */ + if (port->update_sink_caps) + tcpm_set_state(port, SNK_NEGOTIATE_CAPABILITIES, 0); + else + tcpm_set_state(port, SNK_READY, 0); + } else { + tcpm_set_state_cond(port, hard_reset_state(port), + PD_T_SENDER_RESPONSE); + } + break; case SNK_TRANSITION_SINK: case SNK_TRANSITION_SINK_VBUS: tcpm_set_state(port, hard_reset_state(port), @@ -2613,6 +2987,7 @@ static void run_state_machine(struct tcpm_port *port) break; case SNK_READY: port->try_snk_count = 0; + port->update_sink_caps = false; if (port->explicit_contract) { typec_set_pwr_opmode(port->typec_port, TYPEC_PWR_MODE_PD); @@ -2622,6 +2997,8 @@ static void run_state_machine(struct tcpm_port *port) tcpm_swap_complete(port, 0); tcpm_typec_connect(port); tcpm_check_send_discover(port); + tcpm_pps_complete(port, port->pps_status); + break; /* Accessory states */ @@ -2668,6 +3045,7 @@ static void run_state_machine(struct tcpm_port *port) tcpm_set_state(port, SRC_UNATTACHED, PD_T_PS_SOURCE_ON); break; case SNK_HARD_RESET_SINK_OFF: + memset(&port->pps_data, 0, sizeof(port->pps_data)); tcpm_set_vconn(port, false); tcpm_set_charge(port, false); tcpm_set_roles(port, false, TYPEC_SINK, TYPEC_DEVICE); @@ -2888,6 +3266,7 @@ static void run_state_machine(struct tcpm_port *port) break; case ERROR_RECOVERY: tcpm_swap_complete(port, -EPROTO); + tcpm_pps_complete(port, -EPROTO); tcpm_set_state(port, PORT_RESET, 0); break; case PORT_RESET: @@ -3470,6 +3849,162 @@ static int tcpm_try_role(const struct typec_capability *cap, int role) return ret; } +static int __maybe_unused tcpm_pps_set_op_curr(struct tcpm_port *port, u16 op_curr) +{ + unsigned int target_mw; + int ret; + + mutex_lock(&port->swap_lock); + mutex_lock(&port->lock); + + if (!port->pps_data.active) { + ret = -EOPNOTSUPP; + goto port_unlock; + } + + if (port->state != SNK_READY) { + ret = -EAGAIN; + goto port_unlock; + } + + if (op_curr > port->pps_data.max_curr) { + ret = -EINVAL; + goto port_unlock; + } + + target_mw = (op_curr * port->pps_data.out_volt) / 1000; + if (target_mw < port->operating_snk_mw) { + ret = -EINVAL; + goto port_unlock; + } + + reinit_completion(&port->pps_complete); + port->pps_data.op_curr = op_curr; + port->pps_status = 0; + port->pps_pending = true; + tcpm_set_state(port, SNK_NEGOTIATE_PPS_CAPABILITIES, 0); + mutex_unlock(&port->lock); + + if (!wait_for_completion_timeout(&port->pps_complete, + msecs_to_jiffies(PD_PPS_CTRL_TIMEOUT))) + ret = -ETIMEDOUT; + else + ret = port->pps_status; + + goto swap_unlock; + +port_unlock: + mutex_unlock(&port->lock); +swap_unlock: + mutex_unlock(&port->swap_lock); + + return ret; +} + +static int __maybe_unused tcpm_pps_set_out_volt(struct tcpm_port *port, u16 out_volt) +{ + unsigned int target_mw; + int ret; + + mutex_lock(&port->swap_lock); + mutex_lock(&port->lock); + + if (!port->pps_data.active) { + ret = -EOPNOTSUPP; + goto port_unlock; + } + + if (port->state != SNK_READY) { + ret = -EAGAIN; + goto port_unlock; + } + + if (out_volt < port->pps_data.min_volt || + out_volt > port->pps_data.max_volt) { + ret = -EINVAL; + goto port_unlock; + } + + target_mw = (port->pps_data.op_curr * out_volt) / 1000; + if (target_mw < port->operating_snk_mw) { + ret = -EINVAL; + goto port_unlock; + } + + reinit_completion(&port->pps_complete); + port->pps_data.out_volt = out_volt; + port->pps_status = 0; + port->pps_pending = true; + tcpm_set_state(port, SNK_NEGOTIATE_PPS_CAPABILITIES, 0); + mutex_unlock(&port->lock); + + if (!wait_for_completion_timeout(&port->pps_complete, + msecs_to_jiffies(PD_PPS_CTRL_TIMEOUT))) + ret = -ETIMEDOUT; + else + ret = port->pps_status; + + goto swap_unlock; + +port_unlock: + mutex_unlock(&port->lock); +swap_unlock: + mutex_unlock(&port->swap_lock); + + return ret; +} + +static int __maybe_unused tcpm_pps_activate(struct tcpm_port *port, bool activate) +{ + int ret = 0; + + mutex_lock(&port->swap_lock); + mutex_lock(&port->lock); + + if (!port->pps_data.supported) { + ret = -EOPNOTSUPP; + goto port_unlock; + } + + /* Trying to deactivate PPS when already deactivated so just bail */ + if (!port->pps_data.active && !activate) + goto port_unlock; + + if (port->state != SNK_READY) { + ret = -EAGAIN; + goto port_unlock; + } + + reinit_completion(&port->pps_complete); + port->pps_status = 0; + port->pps_pending = true; + + /* Trigger PPS request or move back to standard PDO contract */ + if (activate) { + port->pps_data.out_volt = port->supply_voltage; + port->pps_data.op_curr = port->current_limit; + tcpm_set_state(port, SNK_NEGOTIATE_PPS_CAPABILITIES, 0); + } else { + tcpm_set_state(port, SNK_NEGOTIATE_CAPABILITIES, 0); + } + mutex_unlock(&port->lock); + + if (!wait_for_completion_timeout(&port->pps_complete, + msecs_to_jiffies(PD_PPS_CTRL_TIMEOUT))) + ret = -ETIMEDOUT; + else + ret = port->pps_status; + + goto swap_unlock; + +port_unlock: + mutex_unlock(&port->lock); +swap_unlock: + mutex_unlock(&port->swap_lock); + + return ret; +} + static void tcpm_init(struct tcpm_port *port) { enum typec_cc_status cc1, cc2; @@ -3603,13 +4138,18 @@ int tcpm_update_sink_capabilities(struct tcpm_port *port, const u32 *pdo, mutex_lock(&port->lock); port->nr_snk_pdo = tcpm_copy_pdos(port->snk_pdo, pdo, nr_pdo); port->operating_snk_mw = operating_snk_mw; + port->update_sink_caps = true; switch (port->state) { case SNK_NEGOTIATE_CAPABILITIES: + case SNK_NEGOTIATE_PPS_CAPABILITIES: case SNK_READY: case SNK_TRANSITION_SINK: case SNK_TRANSITION_SINK_VBUS: - tcpm_set_state(port, SNK_NEGOTIATE_CAPABILITIES, 0); + if (port->pps_data.active) + tcpm_set_state(port, SNK_NEGOTIATE_PPS_CAPABILITIES, 0); + else + tcpm_set_state(port, SNK_NEGOTIATE_CAPABILITIES, 0); break; default: break; @@ -3651,6 +4191,7 @@ struct tcpm_port *tcpm_register_port(struct device *dev, struct tcpc_dev *tcpc) init_completion(&port->tx_complete); init_completion(&port->swap_complete); + init_completion(&port->pps_complete); tcpm_debugfs_init(port); if (tcpm_validate_caps(port, tcpc->config->src_pdo, @@ -3677,7 +4218,7 @@ struct tcpm_port *tcpm_register_port(struct device *dev, struct tcpc_dev *tcpc) port->typec_caps.type = tcpc->config->type; port->typec_caps.data = tcpc->config->data; port->typec_caps.revision = 0x0120; /* Type-C spec release 1.2 */ - port->typec_caps.pd_revision = 0x0200; /* USB-PD spec release 2.0 */ + port->typec_caps.pd_revision = 0x0300; /* USB-PD spec release 3.0 */ port->typec_caps.dr_set = tcpm_dr_set; port->typec_caps.pr_set = tcpm_pr_set; port->typec_caps.vconn_set = tcpm_vconn_set; -- cgit v1.1 From f2a8aa053c1761232ce561e4fa725f02b8bd13fd Mon Sep 17 00:00:00 2001 From: Adam Thomson Date: Mon, 23 Apr 2018 15:11:00 +0100 Subject: typec: tcpm: Represent source supply through power_supply This commit adds a power_supply class instance to represent a PD source's voltage and current properties. This provides an interface for reading these properties from user-space or other drivers. For PPS enabled Sources, this also provides write access to set the current and voltage and allows for swapping between standard PDO and PPS APDO. As this represents a superset of the information provided in the fusb302 driver, the power_supply instance in that code is removed as part of this change, so reverting the commit titled 'typec: tcpm: Represent source supply through power_supply class' Signed-off-by: Adam Thomson Reviewed-by: Guenter Roeck Reviewed-by: Heikki Krogerus Signed-off-by: Greg Kroah-Hartman --- drivers/usb/typec/Kconfig | 1 + drivers/usb/typec/fusb302/Kconfig | 2 +- drivers/usb/typec/fusb302/fusb302.c | 63 +-------- drivers/usb/typec/tcpm.c | 251 +++++++++++++++++++++++++++++++++++- 4 files changed, 251 insertions(+), 66 deletions(-) (limited to 'drivers/usb') diff --git a/drivers/usb/typec/Kconfig b/drivers/usb/typec/Kconfig index 030f88c..2c8eab1 100644 --- a/drivers/usb/typec/Kconfig +++ b/drivers/usb/typec/Kconfig @@ -49,6 +49,7 @@ config TYPEC_TCPM tristate "USB Type-C Port Controller Manager" depends on USB select USB_ROLE_SWITCH + select POWER_SUPPLY help The Type-C Port Controller Manager provides a USB PD and USB Type-C state machine for use with Type-C Port Controllers. diff --git a/drivers/usb/typec/fusb302/Kconfig b/drivers/usb/typec/fusb302/Kconfig index 48a4f2f..fce099f 100644 --- a/drivers/usb/typec/fusb302/Kconfig +++ b/drivers/usb/typec/fusb302/Kconfig @@ -1,6 +1,6 @@ config TYPEC_FUSB302 tristate "Fairchild FUSB302 Type-C chip driver" - depends on I2C && POWER_SUPPLY + depends on I2C help The Fairchild FUSB302 Type-C chip driver that works with Type-C Port Controller Manager to provide USB PD and USB diff --git a/drivers/usb/typec/fusb302/fusb302.c b/drivers/usb/typec/fusb302/fusb302.c index 664463d..eba6bb8 100644 --- a/drivers/usb/typec/fusb302/fusb302.c +++ b/drivers/usb/typec/fusb302/fusb302.c @@ -18,7 +18,6 @@ #include #include #include -#include #include #include #include @@ -99,11 +98,6 @@ struct fusb302_chip { /* lock for sharing chip states */ struct mutex lock; - /* psy + psy status */ - struct power_supply *psy; - u32 current_limit; - u32 supply_voltage; - /* chip status */ enum toggling_mode toggling_mode; enum src_current_status src_current_status; @@ -862,13 +856,11 @@ static int tcpm_set_vbus(struct tcpc_dev *dev, bool on, bool charge) chip->vbus_on = on; fusb302_log(chip, "vbus := %s", on ? "On" : "Off"); } - if (chip->charge_on == charge) { + if (chip->charge_on == charge) fusb302_log(chip, "charge is already %s", charge ? "On" : "Off"); - } else { + else chip->charge_on = charge; - power_supply_changed(chip->psy); - } done: mutex_unlock(&chip->lock); @@ -884,11 +876,6 @@ static int tcpm_set_current_limit(struct tcpc_dev *dev, u32 max_ma, u32 mv) fusb302_log(chip, "current limit: %d ma, %d mv (not implemented)", max_ma, mv); - chip->supply_voltage = mv; - chip->current_limit = max_ma; - - power_supply_changed(chip->psy); - return 0; } @@ -1682,43 +1669,6 @@ done: return IRQ_HANDLED; } -static int fusb302_psy_get_property(struct power_supply *psy, - enum power_supply_property psp, - union power_supply_propval *val) -{ - struct fusb302_chip *chip = power_supply_get_drvdata(psy); - - switch (psp) { - case POWER_SUPPLY_PROP_ONLINE: - val->intval = chip->charge_on; - break; - case POWER_SUPPLY_PROP_VOLTAGE_NOW: - val->intval = chip->supply_voltage * 1000; /* mV -> µV */ - break; - case POWER_SUPPLY_PROP_CURRENT_MAX: - val->intval = chip->current_limit * 1000; /* mA -> µA */ - break; - default: - return -ENODATA; - } - - return 0; -} - -static enum power_supply_property fusb302_psy_properties[] = { - POWER_SUPPLY_PROP_ONLINE, - POWER_SUPPLY_PROP_VOLTAGE_NOW, - POWER_SUPPLY_PROP_CURRENT_MAX, -}; - -static const struct power_supply_desc fusb302_psy_desc = { - .name = "fusb302-typec-source", - .type = POWER_SUPPLY_TYPE_USB_TYPE_C, - .properties = fusb302_psy_properties, - .num_properties = ARRAY_SIZE(fusb302_psy_properties), - .get_property = fusb302_psy_get_property, -}; - static int init_gpio(struct fusb302_chip *chip) { struct device_node *node; @@ -1781,7 +1731,6 @@ static int fusb302_probe(struct i2c_client *client, struct fusb302_chip *chip; struct i2c_adapter *adapter; struct device *dev = &client->dev; - struct power_supply_config cfg = {}; const char *name; int ret = 0; u32 v; @@ -1823,14 +1772,6 @@ static int fusb302_probe(struct i2c_client *client, return -EPROBE_DEFER; } - cfg.drv_data = chip; - chip->psy = devm_power_supply_register(dev, &fusb302_psy_desc, &cfg); - if (IS_ERR(chip->psy)) { - ret = PTR_ERR(chip->psy); - dev_err(chip->dev, "Error registering power-supply: %d\n", ret); - return ret; - } - ret = fusb302_debugfs_init(chip); if (ret < 0) return ret; diff --git a/drivers/usb/typec/tcpm.c b/drivers/usb/typec/tcpm.c index b160da3..7547097 100644 --- a/drivers/usb/typec/tcpm.c +++ b/drivers/usb/typec/tcpm.c @@ -12,6 +12,7 @@ #include #include #include +#include #include #include #include @@ -276,6 +277,11 @@ struct tcpm_port { u32 current_limit; u32 supply_voltage; + /* Used to export TA voltage and current */ + struct power_supply *psy; + struct power_supply_desc psy_desc; + enum power_supply_usb_type usb_type; + u32 bist_request; /* PD state for Vendor Defined Messages */ @@ -1895,6 +1901,7 @@ static int tcpm_pd_select_pdo(struct tcpm_port *port, int *sink_pdo, int ret = -EINVAL; port->pps_data.supported = false; + port->usb_type = POWER_SUPPLY_USB_TYPE_PD; /* * Select the source PDO providing the most power which has a @@ -1915,8 +1922,11 @@ static int tcpm_pd_select_pdo(struct tcpm_port *port, int *sink_pdo, min_src_mv = pdo_min_voltage(pdo); break; case PDO_TYPE_APDO: - if (pdo_apdo_type(pdo) == APDO_TYPE_PPS) + if (pdo_apdo_type(pdo) == APDO_TYPE_PPS) { port->pps_data.supported = true; + port->usb_type = + POWER_SUPPLY_USB_TYPE_PD_PPS; + } continue; default: tcpm_log(port, "Invalid source PDO type, ignoring"); @@ -2472,6 +2482,9 @@ static void tcpm_reset_port(struct tcpm_port *port) port->try_snk_count = 0; port->supply_voltage = 0; port->current_limit = 0; + port->usb_type = POWER_SUPPLY_USB_TYPE_C; + + power_supply_changed(port->psy); } static void tcpm_detach(struct tcpm_port *port) @@ -2999,6 +3012,8 @@ static void run_state_machine(struct tcpm_port *port) tcpm_check_send_discover(port); tcpm_pps_complete(port, port->pps_status); + power_supply_changed(port->psy); + break; /* Accessory states */ @@ -3849,7 +3864,7 @@ static int tcpm_try_role(const struct typec_capability *cap, int role) return ret; } -static int __maybe_unused tcpm_pps_set_op_curr(struct tcpm_port *port, u16 op_curr) +static int tcpm_pps_set_op_curr(struct tcpm_port *port, u16 op_curr) { unsigned int target_mw; int ret; @@ -3901,7 +3916,7 @@ swap_unlock: return ret; } -static int __maybe_unused tcpm_pps_set_out_volt(struct tcpm_port *port, u16 out_volt) +static int tcpm_pps_set_out_volt(struct tcpm_port *port, u16 out_volt) { unsigned int target_mw; int ret; @@ -3954,7 +3969,7 @@ swap_unlock: return ret; } -static int __maybe_unused tcpm_pps_activate(struct tcpm_port *port, bool activate) +static int tcpm_pps_activate(struct tcpm_port *port, bool activate) { int ret = 0; @@ -4159,6 +4174,230 @@ int tcpm_update_sink_capabilities(struct tcpm_port *port, const u32 *pdo, } EXPORT_SYMBOL_GPL(tcpm_update_sink_capabilities); +/* Power Supply access to expose source power information */ +enum tcpm_psy_online_states { + TCPM_PSY_OFFLINE = 0, + TCPM_PSY_FIXED_ONLINE, + TCPM_PSY_PROG_ONLINE, +}; + +static enum power_supply_property tcpm_psy_props[] = { + POWER_SUPPLY_PROP_USB_TYPE, + POWER_SUPPLY_PROP_ONLINE, + POWER_SUPPLY_PROP_VOLTAGE_MIN, + POWER_SUPPLY_PROP_VOLTAGE_MAX, + POWER_SUPPLY_PROP_VOLTAGE_NOW, + POWER_SUPPLY_PROP_CURRENT_MAX, + POWER_SUPPLY_PROP_CURRENT_NOW, +}; + +static int tcpm_psy_get_online(struct tcpm_port *port, + union power_supply_propval *val) +{ + if (port->vbus_charge) { + if (port->pps_data.active) + val->intval = TCPM_PSY_PROG_ONLINE; + else + val->intval = TCPM_PSY_FIXED_ONLINE; + } else { + val->intval = TCPM_PSY_OFFLINE; + } + + return 0; +} + +static int tcpm_psy_get_voltage_min(struct tcpm_port *port, + union power_supply_propval *val) +{ + if (port->pps_data.active) + val->intval = port->pps_data.min_volt * 1000; + else + val->intval = port->supply_voltage * 1000; + + return 0; +} + +static int tcpm_psy_get_voltage_max(struct tcpm_port *port, + union power_supply_propval *val) +{ + if (port->pps_data.active) + val->intval = port->pps_data.max_volt * 1000; + else + val->intval = port->supply_voltage * 1000; + + return 0; +} + +static int tcpm_psy_get_voltage_now(struct tcpm_port *port, + union power_supply_propval *val) +{ + val->intval = port->supply_voltage * 1000; + + return 0; +} + +static int tcpm_psy_get_current_max(struct tcpm_port *port, + union power_supply_propval *val) +{ + if (port->pps_data.active) + val->intval = port->pps_data.max_curr * 1000; + else + val->intval = port->current_limit * 1000; + + return 0; +} + +static int tcpm_psy_get_current_now(struct tcpm_port *port, + union power_supply_propval *val) +{ + val->intval = port->current_limit * 1000; + + return 0; +} + +static int tcpm_psy_get_prop(struct power_supply *psy, + enum power_supply_property psp, + union power_supply_propval *val) +{ + struct tcpm_port *port = power_supply_get_drvdata(psy); + int ret = 0; + + switch (psp) { + case POWER_SUPPLY_PROP_USB_TYPE: + val->intval = port->usb_type; + break; + case POWER_SUPPLY_PROP_ONLINE: + ret = tcpm_psy_get_online(port, val); + break; + case POWER_SUPPLY_PROP_VOLTAGE_MIN: + ret = tcpm_psy_get_voltage_min(port, val); + break; + case POWER_SUPPLY_PROP_VOLTAGE_MAX: + ret = tcpm_psy_get_voltage_max(port, val); + break; + case POWER_SUPPLY_PROP_VOLTAGE_NOW: + ret = tcpm_psy_get_voltage_now(port, val); + break; + case POWER_SUPPLY_PROP_CURRENT_MAX: + ret = tcpm_psy_get_current_max(port, val); + break; + case POWER_SUPPLY_PROP_CURRENT_NOW: + ret = tcpm_psy_get_current_now(port, val); + break; + default: + ret = -EINVAL; + break; + } + + return ret; +} + +static int tcpm_psy_set_online(struct tcpm_port *port, + const union power_supply_propval *val) +{ + int ret; + + switch (val->intval) { + case TCPM_PSY_FIXED_ONLINE: + ret = tcpm_pps_activate(port, false); + break; + case TCPM_PSY_PROG_ONLINE: + ret = tcpm_pps_activate(port, true); + break; + default: + ret = -EINVAL; + break; + } + + return ret; +} + +static int tcpm_psy_set_prop(struct power_supply *psy, + enum power_supply_property psp, + const union power_supply_propval *val) +{ + struct tcpm_port *port = power_supply_get_drvdata(psy); + int ret; + + switch (psp) { + case POWER_SUPPLY_PROP_ONLINE: + ret = tcpm_psy_set_online(port, val); + break; + case POWER_SUPPLY_PROP_VOLTAGE_NOW: + if (val->intval < port->pps_data.min_volt * 1000 || + val->intval > port->pps_data.max_volt * 1000) + ret = -EINVAL; + else + ret = tcpm_pps_set_out_volt(port, val->intval / 1000); + break; + case POWER_SUPPLY_PROP_CURRENT_NOW: + if (val->intval > port->pps_data.max_curr * 1000) + ret = -EINVAL; + else + ret = tcpm_pps_set_op_curr(port, val->intval / 1000); + break; + default: + ret = -EINVAL; + break; + } + + return ret; +} + +static int tcpm_psy_prop_writeable(struct power_supply *psy, + enum power_supply_property psp) +{ + switch (psp) { + case POWER_SUPPLY_PROP_ONLINE: + case POWER_SUPPLY_PROP_VOLTAGE_NOW: + case POWER_SUPPLY_PROP_CURRENT_NOW: + return 1; + default: + return 0; + } +} + +static enum power_supply_usb_type tcpm_psy_usb_types[] = { + POWER_SUPPLY_USB_TYPE_C, + POWER_SUPPLY_USB_TYPE_PD, + POWER_SUPPLY_USB_TYPE_PD_PPS, +}; + +static const char *tcpm_psy_name_prefix = "tcpm-source-psy-"; + +static int devm_tcpm_psy_register(struct tcpm_port *port) +{ + struct power_supply_config psy_cfg = {}; + const char *port_dev_name = dev_name(port->dev); + size_t psy_name_len = strlen(tcpm_psy_name_prefix) + + strlen(port_dev_name) + 1; + char *psy_name; + + psy_cfg.drv_data = port; + psy_name = devm_kzalloc(port->dev, psy_name_len, GFP_KERNEL); + if (!psy_name) + return -ENOMEM; + + snprintf(psy_name, psy_name_len, "%s%s", tcpm_psy_name_prefix, + port_dev_name); + port->psy_desc.name = psy_name; + port->psy_desc.type = POWER_SUPPLY_TYPE_USB, + port->psy_desc.usb_types = tcpm_psy_usb_types; + port->psy_desc.num_usb_types = ARRAY_SIZE(tcpm_psy_usb_types); + port->psy_desc.properties = tcpm_psy_props, + port->psy_desc.num_properties = ARRAY_SIZE(tcpm_psy_props), + port->psy_desc.get_property = tcpm_psy_get_prop, + port->psy_desc.set_property = tcpm_psy_set_prop, + port->psy_desc.property_is_writeable = tcpm_psy_prop_writeable, + + port->usb_type = POWER_SUPPLY_USB_TYPE_C; + + port->psy = devm_power_supply_register(port->dev, &port->psy_desc, + &psy_cfg); + + return PTR_ERR_OR_ZERO(port->psy); +} + struct tcpm_port *tcpm_register_port(struct device *dev, struct tcpc_dev *tcpc) { struct tcpm_port *port; @@ -4234,6 +4473,10 @@ struct tcpm_port *tcpm_register_port(struct device *dev, struct tcpc_dev *tcpc) goto out_destroy_wq; } + err = devm_tcpm_psy_register(port); + if (err) + goto out_destroy_wq; + port->typec_port = typec_register_port(port->dev, &port->typec_caps); if (IS_ERR(port->typec_port)) { err = PTR_ERR(port->typec_port); -- cgit v1.1 From 64f7c494a3c02be664e287297144a2e84f9c7625 Mon Sep 17 00:00:00 2001 From: Adam Thomson Date: Mon, 23 Apr 2018 15:11:01 +0100 Subject: typec: tcpm: Add support for sink PPS related messages This commit adds sink side support for Get_Status, Status, Get_PPS_Status and PPS_Status handling. As there's the potential for a partner to respond with Not_Supported, handling of this message is also added. Sending of Not_Supported is added to handle messagescreceived but not yet handled. Signed-off-by: Adam Thomson Acked-by: Heikki Krogerus Reviewed-by: Guenter Roeck Signed-off-by: Greg Kroah-Hartman --- drivers/usb/typec/tcpm.c | 143 ++++++++++++++++++++++++++++++++++++++++++++--- 1 file changed, 134 insertions(+), 9 deletions(-) (limited to 'drivers/usb') diff --git a/drivers/usb/typec/tcpm.c b/drivers/usb/typec/tcpm.c index 7547097..4483dc4 100644 --- a/drivers/usb/typec/tcpm.c +++ b/drivers/usb/typec/tcpm.c @@ -19,7 +19,9 @@ #include #include #include +#include #include +#include #include #include #include @@ -114,6 +116,11 @@ S(SNK_TRYWAIT_VBUS), \ S(BIST_RX), \ \ + S(GET_STATUS_SEND), \ + S(GET_STATUS_SEND_TIMEOUT), \ + S(GET_PPS_STATUS_SEND), \ + S(GET_PPS_STATUS_SEND_TIMEOUT), \ + \ S(ERROR_RECOVERY), \ S(PORT_RESET), \ S(PORT_RESET_WAIT_OFF) @@ -144,6 +151,7 @@ enum pd_msg_request { PD_MSG_NONE = 0, PD_MSG_CTRL_REJECT, PD_MSG_CTRL_WAIT, + PD_MSG_CTRL_NOT_SUPP, PD_MSG_DATA_SINK_CAP, PD_MSG_DATA_SOURCE_CAP, }; @@ -1411,10 +1419,42 @@ static int tcpm_validate_caps(struct tcpm_port *port, const u32 *pdo, /* * PD (data, control) command handling functions */ +static inline enum tcpm_state ready_state(struct tcpm_port *port) +{ + if (port->pwr_role == TYPEC_SOURCE) + return SRC_READY; + else + return SNK_READY; +} static int tcpm_pd_send_control(struct tcpm_port *port, enum pd_ctrl_msg_type type); +static void tcpm_handle_alert(struct tcpm_port *port, const __le32 *payload, + int cnt) +{ + u32 p0 = le32_to_cpu(payload[0]); + unsigned int type = usb_pd_ado_type(p0); + + if (!type) { + tcpm_log(port, "Alert message received with no type"); + return; + } + + /* Just handling non-battery alerts for now */ + if (!(type & USB_PD_ADO_TYPE_BATT_STATUS_CHANGE)) { + switch (port->state) { + case SRC_READY: + case SNK_READY: + tcpm_set_state(port, GET_STATUS_SEND, 0); + break; + default: + tcpm_queue_message(port, PD_MSG_CTRL_WAIT); + break; + } + } +} + static void tcpm_pd_data_request(struct tcpm_port *port, const struct pd_message *msg) { @@ -1502,6 +1542,14 @@ static void tcpm_pd_data_request(struct tcpm_port *port, tcpm_set_state(port, BIST_RX, 0); } break; + case PD_DATA_ALERT: + tcpm_handle_alert(port, msg->payload, cnt); + break; + case PD_DATA_BATT_STATUS: + case PD_DATA_GET_COUNTRY_INFO: + /* Currently unsupported */ + tcpm_queue_message(port, PD_MSG_CTRL_NOT_SUPP); + break; default: tcpm_log(port, "Unhandled data message type %#x", type); break; @@ -1584,6 +1632,7 @@ static void tcpm_pd_ctrl_request(struct tcpm_port *port, break; case PD_CTRL_REJECT: case PD_CTRL_WAIT: + case PD_CTRL_NOT_SUPP: switch (port->state) { case SNK_NEGOTIATE_CAPABILITIES: /* USB PD specification, Figure 8-43 */ @@ -1703,12 +1752,75 @@ static void tcpm_pd_ctrl_request(struct tcpm_port *port, break; } break; + case PD_CTRL_GET_SOURCE_CAP_EXT: + case PD_CTRL_GET_STATUS: + case PD_CTRL_FR_SWAP: + case PD_CTRL_GET_PPS_STATUS: + case PD_CTRL_GET_COUNTRY_CODES: + /* Currently not supported */ + tcpm_queue_message(port, PD_MSG_CTRL_NOT_SUPP); + break; default: tcpm_log(port, "Unhandled ctrl message type %#x", type); break; } } +static void tcpm_pd_ext_msg_request(struct tcpm_port *port, + const struct pd_message *msg) +{ + enum pd_ext_msg_type type = pd_header_type_le(msg->header); + unsigned int data_size = pd_ext_header_data_size_le(msg->ext_msg.header); + + if (!(msg->ext_msg.header && PD_EXT_HDR_CHUNKED)) { + tcpm_log(port, "Unchunked extended messages unsupported"); + return; + } + + if (data_size > PD_EXT_MAX_CHUNK_DATA) { + tcpm_log(port, "Chunk handling not yet supported"); + return; + } + + switch (type) { + case PD_EXT_STATUS: + /* + * If PPS related events raised then get PPS status to clear + * (see USB PD 3.0 Spec, 6.5.2.4) + */ + if (msg->ext_msg.data[USB_PD_EXT_SDB_EVENT_FLAGS] & + USB_PD_EXT_SDB_PPS_EVENTS) + tcpm_set_state(port, GET_PPS_STATUS_SEND, 0); + else + tcpm_set_state(port, ready_state(port), 0); + break; + case PD_EXT_PPS_STATUS: + /* + * For now the PPS status message is used to clear events + * and nothing more. + */ + tcpm_set_state(port, ready_state(port), 0); + break; + case PD_EXT_SOURCE_CAP_EXT: + case PD_EXT_GET_BATT_CAP: + case PD_EXT_GET_BATT_STATUS: + case PD_EXT_BATT_CAP: + case PD_EXT_GET_MANUFACTURER_INFO: + case PD_EXT_MANUFACTURER_INFO: + case PD_EXT_SECURITY_REQUEST: + case PD_EXT_SECURITY_RESPONSE: + case PD_EXT_FW_UPDATE_REQUEST: + case PD_EXT_FW_UPDATE_RESPONSE: + case PD_EXT_COUNTRY_INFO: + case PD_EXT_COUNTRY_CODES: + tcpm_queue_message(port, PD_MSG_CTRL_NOT_SUPP); + break; + default: + tcpm_log(port, "Unhandled extended message type %#x", type); + break; + } +} + static void tcpm_pd_rx_handler(struct work_struct *work) { struct pd_rx_event *event = container_of(work, @@ -1749,7 +1861,9 @@ static void tcpm_pd_rx_handler(struct work_struct *work) "Data role mismatch, initiating error recovery"); tcpm_set_state(port, ERROR_RECOVERY, 0); } else { - if (cnt) + if (msg->header & PD_HEADER_EXT_HDR) + tcpm_pd_ext_msg_request(port, msg); + else if (cnt) tcpm_pd_data_request(port, msg); else tcpm_pd_ctrl_request(port, msg); @@ -1810,6 +1924,9 @@ static bool tcpm_send_queued_message(struct tcpm_port *port) case PD_MSG_CTRL_REJECT: tcpm_pd_send_control(port, PD_CTRL_REJECT); break; + case PD_MSG_CTRL_NOT_SUPP: + tcpm_pd_send_control(port, PD_CTRL_NOT_SUPP); + break; case PD_MSG_DATA_SINK_CAP: tcpm_pd_send_sink_caps(port); break; @@ -2572,14 +2689,6 @@ static inline enum tcpm_state hard_reset_state(struct tcpm_port *port) return SNK_UNATTACHED; } -static inline enum tcpm_state ready_state(struct tcpm_port *port) -{ - if (port->pwr_role == TYPEC_SOURCE) - return SRC_READY; - else - return SNK_READY; -} - static inline enum tcpm_state unattached_state(struct tcpm_port *port) { if (port->port_type == TYPEC_PORT_DRP) { @@ -3279,6 +3388,22 @@ static void run_state_machine(struct tcpm_port *port) /* Always switch to unattached state */ tcpm_set_state(port, unattached_state(port), 0); break; + case GET_STATUS_SEND: + tcpm_pd_send_control(port, PD_CTRL_GET_STATUS); + tcpm_set_state(port, GET_STATUS_SEND_TIMEOUT, + PD_T_SENDER_RESPONSE); + break; + case GET_STATUS_SEND_TIMEOUT: + tcpm_set_state(port, ready_state(port), 0); + break; + case GET_PPS_STATUS_SEND: + tcpm_pd_send_control(port, PD_CTRL_GET_PPS_STATUS); + tcpm_set_state(port, GET_PPS_STATUS_SEND_TIMEOUT, + PD_T_SENDER_RESPONSE); + break; + case GET_PPS_STATUS_SEND_TIMEOUT: + tcpm_set_state(port, ready_state(port), 0); + break; case ERROR_RECOVERY: tcpm_swap_complete(port, -EPROTO); tcpm_pps_complete(port, -EPROTO); -- cgit v1.1 From 0c718676ab3f02e98e85e7049e03d2879c62cb10 Mon Sep 17 00:00:00 2001 From: Greg Kroah-Hartman Date: Wed, 25 Apr 2018 14:24:34 +0200 Subject: typec: tcpm: fix compiler warning about stupid things gcc thinks it is too smart and gives off a "you might be using this variable before it is initialized" warning in tcpm_pd_build_request(), because it can not follow the logic through the tcpm_pd_select_pdo() call. So just make gcc quiet by initializing things to 0, to prevent the myriad of people complaining that we now have a build warning. Cc: Adam Thomson Cc: Heikki Krogerus Cc: Guenter Roeck Signed-off-by: Greg Kroah-Hartman --- drivers/usb/typec/tcpm.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) (limited to 'drivers/usb') diff --git a/drivers/usb/typec/tcpm.c b/drivers/usb/typec/tcpm.c index 4483dc4..1ee259b 100644 --- a/drivers/usb/typec/tcpm.c +++ b/drivers/usb/typec/tcpm.c @@ -2206,8 +2206,9 @@ static int tcpm_pd_build_request(struct tcpm_port *port, u32 *rdo) unsigned int mv, ma, mw, flags; unsigned int max_ma, max_mw; enum pd_pdo_type type; - int src_pdo_index, snk_pdo_index; u32 pdo, matching_snk_pdo; + int src_pdo_index = 0; + int snk_pdo_index = 0; int ret; ret = tcpm_pd_select_pdo(port, &snk_pdo_index, &src_pdo_index); -- cgit v1.1 From a4a00f6b9dc0e3ea13145f53ce163821eb1a6fa0 Mon Sep 17 00:00:00 2001 From: Colin Ian King Date: Fri, 27 Apr 2018 20:12:31 +0100 Subject: usb-misc: sisusbvga: fix spelling mistake: "asymmeric" -> "asymmetric" Trivial fix to spelling mistake in text string Signed-off-by: Colin Ian King Signed-off-by: Greg Kroah-Hartman --- drivers/usb/misc/sisusbvga/sisusb.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers/usb') diff --git a/drivers/usb/misc/sisusbvga/sisusb.c b/drivers/usb/misc/sisusbvga/sisusb.c index 3e65bdc..f92c5df 100644 --- a/drivers/usb/misc/sisusbvga/sisusb.c +++ b/drivers/usb/misc/sisusbvga/sisusb.c @@ -2107,7 +2107,7 @@ static void sisusb_get_ramconfig(struct sisusb_usb_data *sisusb) bw = busSDR[(tmp8 & 0x03)]; break; case 2: - ramtypetext1 = "asymmeric"; + ramtypetext1 = "asymmetric"; sisusb->vramsize += sisusb->vramsize/2; bw = busDDRA[(tmp8 & 0x03)]; break; -- cgit v1.1 From 252427037a360dcf4ee4b38e3b11c85e884b6646 Mon Sep 17 00:00:00 2001 From: "Gustavo A. R. Silva" Date: Mon, 30 Apr 2018 08:23:06 -0500 Subject: typec: tcpm: Fix incorrect 'and' operator Currently, logical and is being used instead of *bitwise* and. Fix this by using a proper bitwise and operator. Addresses-Coverity-ID: 1468455 ("Logical vs. bitwise operator") Fixes: 64f7c494a3c0 ("typec: tcpm: Add support for sink PPS related messages") Signed-off-by: Gustavo A. R. Silva Acked-by: Adam Thomson Signed-off-by: Greg Kroah-Hartman --- drivers/usb/typec/tcpm.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers/usb') diff --git a/drivers/usb/typec/tcpm.c b/drivers/usb/typec/tcpm.c index 1ee259b..7ee417a 100644 --- a/drivers/usb/typec/tcpm.c +++ b/drivers/usb/typec/tcpm.c @@ -1772,7 +1772,7 @@ static void tcpm_pd_ext_msg_request(struct tcpm_port *port, enum pd_ext_msg_type type = pd_header_type_le(msg->header); unsigned int data_size = pd_ext_header_data_size_le(msg->ext_msg.header); - if (!(msg->ext_msg.header && PD_EXT_HDR_CHUNKED)) { + if (!(msg->ext_msg.header & PD_EXT_HDR_CHUNKED)) { tcpm_log(port, "Unchunked extended messages unsupported"); return; } -- cgit v1.1 From 4d304a6fe93538ce356b4593dc43476b50c023e7 Mon Sep 17 00:00:00 2001 From: Giuseppe Lippolis Date: Mon, 23 Apr 2018 09:03:06 +0200 Subject: USB: serial: option: blacklist unused dwm-158 interfaces The dwm-158 interface 4 and 5 doesn't answer to the AT commands and doesn't appears a option interface. Tested on openwrt distribution (kernel 4.14 using the old blacklist definitions). Lars Melin also writes: Blacklisting interface 4 and 5 is correct because: MI_00 D-Link Mobile Broadband Device (cdc_ether) MI_02 D-Link HSPA+DataCard Diagnostics Interface (also ppp modem) MI_03 D-Link HSPA+DataCard NMEA Device MI_04 D-Link HSPA+DataCard Speech Port MI_05 D-Link HSPA+DataCard Debug Port MI_06 USB Mass Storage Device Signed-off-by: Giuseppe Lippolis [ johan: add Lars's comment on the interface layout and reword summary ] Cc: Lars Melin Cc: Dan Williams Signed-off-by: Johan Hovold --- drivers/usb/serial/option.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) (limited to 'drivers/usb') diff --git a/drivers/usb/serial/option.c b/drivers/usb/serial/option.c index c3f2522..f0c3612 100644 --- a/drivers/usb/serial/option.c +++ b/drivers/usb/serial/option.c @@ -1911,7 +1911,8 @@ static const struct usb_device_id option_ids[] = { { USB_DEVICE_INTERFACE_CLASS(0x2001, 0x7d01, 0xff) }, /* D-Link DWM-156 (variant) */ { USB_DEVICE_INTERFACE_CLASS(0x2001, 0x7d02, 0xff) }, { USB_DEVICE_INTERFACE_CLASS(0x2001, 0x7d03, 0xff) }, - { USB_DEVICE_INTERFACE_CLASS(0x2001, 0x7d04, 0xff) }, /* D-Link DWM-158 */ + { USB_DEVICE_INTERFACE_CLASS(0x2001, 0x7d04, 0xff), /* D-Link DWM-158 */ + .driver_info = RSVD(4) | RSVD(5) }, { USB_DEVICE_INTERFACE_CLASS(0x2001, 0x7d0e, 0xff) }, /* D-Link DWM-157 C1 */ { USB_DEVICE_INTERFACE_CLASS(0x2001, 0x7e19, 0xff), /* D-Link DWM-221 B1 */ .driver_info = RSVD(4) }, -- cgit v1.1 From ae70c6dc3f956ce05cd06a61286b6d42189a2f6d Mon Sep 17 00:00:00 2001 From: "Shuah Khan (Samsung OSG)" Date: Mon, 30 Apr 2018 16:17:19 -0600 Subject: usbip: usbip_host: delete device from busid_table after rebind Device is left in the busid_table after unbind and rebind. Rebind initiates usb bus scan and the original driver claims the device. After rescan the device should be deleted from the busid_table as it no longer belongs to usbip_host. Fix it to delete the device after device_attach() succeeds. Signed-off-by: Shuah Khan (Samsung OSG) Signed-off-by: Greg Kroah-Hartman --- drivers/usb/usbip/stub_main.c | 6 ++++++ 1 file changed, 6 insertions(+) (limited to 'drivers/usb') diff --git a/drivers/usb/usbip/stub_main.c b/drivers/usb/usbip/stub_main.c index d41d0cd..fb46bd6 100644 --- a/drivers/usb/usbip/stub_main.c +++ b/drivers/usb/usbip/stub_main.c @@ -186,6 +186,9 @@ static ssize_t rebind_store(struct device_driver *dev, const char *buf, if (!bid) return -ENODEV; + /* mark the device for deletion so probe ignores it during rescan */ + bid->status = STUB_BUSID_OTHER; + /* device_attach() callers should hold parent lock for USB */ if (bid->udev->dev.parent) device_lock(bid->udev->dev.parent); @@ -197,6 +200,9 @@ static ssize_t rebind_store(struct device_driver *dev, const char *buf, return ret; } + /* delete device from busid_table */ + del_match_busid((char *) buf); + return count; } -- cgit v1.1 From dcadfaf2127e067e87843ff688f4ae5674a8d607 Mon Sep 17 00:00:00 2001 From: "Shuah Khan (Samsung OSG)" Date: Mon, 30 Apr 2018 16:17:20 -0600 Subject: usbip: usbip_host: run rebind from exit when module is removed After removing usbip_host module, devices it releases are left without a driver. For example, when a keyboard or a mass storage device are bound to usbip_host when it is removed, these devices are no longer bound to any driver. Fix it to run device_attach() from the module exit routine to restore the devices to their original drivers. This includes cleanup changes and moving device_attach() code to a common routine to be called from rebind_store() and usbip_host_exit(). Signed-off-by: Shuah Khan (Samsung OSG) Signed-off-by: Greg Kroah-Hartman --- drivers/usb/usbip/stub_dev.c | 6 +---- drivers/usb/usbip/stub_main.c | 60 ++++++++++++++++++++++++++++++++++++------- 2 files changed, 52 insertions(+), 14 deletions(-) (limited to 'drivers/usb') diff --git a/drivers/usb/usbip/stub_dev.c b/drivers/usb/usbip/stub_dev.c index 7813c18..9d04251 100644 --- a/drivers/usb/usbip/stub_dev.c +++ b/drivers/usb/usbip/stub_dev.c @@ -448,12 +448,8 @@ static void stub_disconnect(struct usb_device *udev) busid_priv->sdev = NULL; stub_device_free(sdev); - if (busid_priv->status == STUB_BUSID_ALLOC) { + if (busid_priv->status == STUB_BUSID_ALLOC) busid_priv->status = STUB_BUSID_ADDED; - } else { - busid_priv->status = STUB_BUSID_OTHER; - del_match_busid((char *)udev_busid); - } } #ifdef CONFIG_PM diff --git a/drivers/usb/usbip/stub_main.c b/drivers/usb/usbip/stub_main.c index fb46bd6..587b9bc 100644 --- a/drivers/usb/usbip/stub_main.c +++ b/drivers/usb/usbip/stub_main.c @@ -14,6 +14,7 @@ #define DRIVER_DESC "USB/IP Host Driver" struct kmem_cache *stub_priv_cache; + /* * busid_tables defines matching busids that usbip can grab. A user can change * dynamically what device is locally used and what device is exported to a @@ -169,6 +170,51 @@ static ssize_t match_busid_store(struct device_driver *dev, const char *buf, } static DRIVER_ATTR_RW(match_busid); +static int do_rebind(char *busid, struct bus_id_priv *busid_priv) +{ + int ret; + + /* device_attach() callers should hold parent lock for USB */ + if (busid_priv->udev->dev.parent) + device_lock(busid_priv->udev->dev.parent); + ret = device_attach(&busid_priv->udev->dev); + if (busid_priv->udev->dev.parent) + device_unlock(busid_priv->udev->dev.parent); + if (ret < 0) { + dev_err(&busid_priv->udev->dev, "rebind failed\n"); + return ret; + } + return 0; +} + +static void stub_device_rebind(void) +{ +#if IS_MODULE(CONFIG_USBIP_HOST) + struct bus_id_priv *busid_priv; + int i; + + /* update status to STUB_BUSID_OTHER so probe ignores the device */ + spin_lock(&busid_table_lock); + for (i = 0; i < MAX_BUSID; i++) { + if (busid_table[i].name[0] && + busid_table[i].shutdown_busid) { + busid_priv = &(busid_table[i]); + busid_priv->status = STUB_BUSID_OTHER; + } + } + spin_unlock(&busid_table_lock); + + /* now run rebind */ + for (i = 0; i < MAX_BUSID; i++) { + if (busid_table[i].name[0] && + busid_table[i].shutdown_busid) { + busid_priv = &(busid_table[i]); + do_rebind(busid_table[i].name, busid_priv); + } + } +#endif +} + static ssize_t rebind_store(struct device_driver *dev, const char *buf, size_t count) { @@ -189,16 +235,9 @@ static ssize_t rebind_store(struct device_driver *dev, const char *buf, /* mark the device for deletion so probe ignores it during rescan */ bid->status = STUB_BUSID_OTHER; - /* device_attach() callers should hold parent lock for USB */ - if (bid->udev->dev.parent) - device_lock(bid->udev->dev.parent); - ret = device_attach(&bid->udev->dev); - if (bid->udev->dev.parent) - device_unlock(bid->udev->dev.parent); - if (ret < 0) { - dev_err(&bid->udev->dev, "rebind failed\n"); + ret = do_rebind((char *) buf, bid); + if (ret < 0) return ret; - } /* delete device from busid_table */ del_match_busid((char *) buf); @@ -323,6 +362,9 @@ static void __exit usbip_host_exit(void) */ usb_deregister_device_driver(&stub_driver); + /* initiate scan to attach devices */ + stub_device_rebind(); + kmem_cache_destroy(stub_priv_cache); } -- cgit v1.1 From 655016dc2d30379a417404ae88df9bfb7ede38e6 Mon Sep 17 00:00:00 2001 From: Benjamin Herrenschmidt Date: Fri, 4 May 2018 06:59:42 +1000 Subject: usb/gadget: Constify usb_gadget_get_string "table" argument The table is never modified by the function. This allows us to use it on a statically defined table that is marked const. Signed-off-by: Benjamin Herrenschmidt Signed-off-by: Felipe Balbi --- drivers/usb/gadget/usbstring.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers/usb') diff --git a/drivers/usb/gadget/usbstring.c b/drivers/usb/gadget/usbstring.c index 566ab26..7c24d1c 100644 --- a/drivers/usb/gadget/usbstring.c +++ b/drivers/usb/gadget/usbstring.c @@ -33,7 +33,7 @@ * characters (which are also widely used in C strings). */ int -usb_gadget_get_string (struct usb_gadget_strings *table, int id, u8 *buf) +usb_gadget_get_string (const struct usb_gadget_strings *table, int id, u8 *buf) { struct usb_string *s; int len; -- cgit v1.1 From 7ecca2a4080cb6b1fa174adc588fce9e9014c43c Mon Sep 17 00:00:00 2001 From: Benjamin Herrenschmidt Date: Fri, 4 May 2018 06:59:43 +1000 Subject: usb/gadget: Add driver for Aspeed SoC virtual hub The Aspeed BMC SoCs support a "virtual hub" function. It provides some HW support for a top-level USB2 hub behind which sit 5 gadget "ports". This driver adds support for the full functionality, emulating the hub standard requests and exposing 5 UDC gadget drivers corresponding to the ports. The hub itself has HW provided dedicated EP0 and EP1 (the latter for hub interrupts). It also has dedicated EP0s for each function. For other endpoints, there's a pool of 15 "generic" endpoints that are shared among the ports. The driver relies on my previous patch adding a "dispose" EP op to handle EP allocation between ports. EPs are allocated from the shared pool in the UDC "match_ep" callback and assigned to the UDC instance (added to the gadget ep_list). When the composite driver gets unbound, the new hook will allow the UDC to clean things up and return those EPs to the shared pool. Signed-off-by: Benjamin Herrenschmidt Signed-off-by: Felipe Balbi --- drivers/usb/gadget/udc/Kconfig | 2 + drivers/usb/gadget/udc/Makefile | 1 + drivers/usb/gadget/udc/aspeed-vhub/Kconfig | 7 + drivers/usb/gadget/udc/aspeed-vhub/Makefile | 4 + drivers/usb/gadget/udc/aspeed-vhub/core.c | 425 ++++++++++++++ drivers/usb/gadget/udc/aspeed-vhub/dev.c | 589 +++++++++++++++++++ drivers/usb/gadget/udc/aspeed-vhub/ep0.c | 486 ++++++++++++++++ drivers/usb/gadget/udc/aspeed-vhub/epn.c | 843 ++++++++++++++++++++++++++++ drivers/usb/gadget/udc/aspeed-vhub/hub.c | 829 +++++++++++++++++++++++++++ drivers/usb/gadget/udc/aspeed-vhub/vhub.h | 514 +++++++++++++++++ 10 files changed, 3700 insertions(+) create mode 100644 drivers/usb/gadget/udc/aspeed-vhub/Kconfig create mode 100644 drivers/usb/gadget/udc/aspeed-vhub/Makefile create mode 100644 drivers/usb/gadget/udc/aspeed-vhub/core.c create mode 100644 drivers/usb/gadget/udc/aspeed-vhub/dev.c create mode 100644 drivers/usb/gadget/udc/aspeed-vhub/ep0.c create mode 100644 drivers/usb/gadget/udc/aspeed-vhub/epn.c create mode 100644 drivers/usb/gadget/udc/aspeed-vhub/hub.c create mode 100644 drivers/usb/gadget/udc/aspeed-vhub/vhub.h (limited to 'drivers/usb') diff --git a/drivers/usb/gadget/udc/Kconfig b/drivers/usb/gadget/udc/Kconfig index 0875d38..b838cae 100644 --- a/drivers/usb/gadget/udc/Kconfig +++ b/drivers/usb/gadget/udc/Kconfig @@ -438,6 +438,8 @@ config USB_GADGET_XILINX dynamically linked module called "udc-xilinx" and force all gadget drivers to also be dynamically linked. +source "drivers/usb/gadget/udc/aspeed-vhub/Kconfig" + # # LAST -- dummy/emulated controller # diff --git a/drivers/usb/gadget/udc/Makefile b/drivers/usb/gadget/udc/Makefile index ce865b1..897f648 100644 --- a/drivers/usb/gadget/udc/Makefile +++ b/drivers/usb/gadget/udc/Makefile @@ -39,4 +39,5 @@ obj-$(CONFIG_USB_MV_U3D) += mv_u3d_core.o obj-$(CONFIG_USB_GR_UDC) += gr_udc.o obj-$(CONFIG_USB_GADGET_XILINX) += udc-xilinx.o obj-$(CONFIG_USB_SNP_UDC_PLAT) += snps_udc_plat.o +obj-$(CONFIG_USB_ASPEED_VHUB) += aspeed-vhub/ obj-$(CONFIG_USB_BDC_UDC) += bdc/ diff --git a/drivers/usb/gadget/udc/aspeed-vhub/Kconfig b/drivers/usb/gadget/udc/aspeed-vhub/Kconfig new file mode 100644 index 0000000..f0cdf89 --- /dev/null +++ b/drivers/usb/gadget/udc/aspeed-vhub/Kconfig @@ -0,0 +1,7 @@ +# SPDX-License-Identifier: GPL-2.0+ +config USB_ASPEED_VHUB + tristate "Aspeed vHub UDC driver" + depends on ARCH_ASPEED || COMPILE_TEST + help + USB peripheral controller for the Aspeed AST2500 family + SoCs supporting the "vHub" functionality and USB2.0 diff --git a/drivers/usb/gadget/udc/aspeed-vhub/Makefile b/drivers/usb/gadget/udc/aspeed-vhub/Makefile new file mode 100644 index 0000000..9f3add6 --- /dev/null +++ b/drivers/usb/gadget/udc/aspeed-vhub/Makefile @@ -0,0 +1,4 @@ +# SPDX-License-Identifier: GPL-2.0+ +obj-$(CONFIG_USB_ASPEED_VHUB) += aspeed-vhub.o +aspeed-vhub-y := core.o ep0.o epn.o dev.o hub.o + diff --git a/drivers/usb/gadget/udc/aspeed-vhub/core.c b/drivers/usb/gadget/udc/aspeed-vhub/core.c new file mode 100644 index 0000000..db3628b --- /dev/null +++ b/drivers/usb/gadget/udc/aspeed-vhub/core.c @@ -0,0 +1,425 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * aspeed-vhub -- Driver for Aspeed SoC "vHub" USB gadget + * + * core.c - Top level support + * + * Copyright 2017 IBM Corporation + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include "vhub.h" + +void ast_vhub_done(struct ast_vhub_ep *ep, struct ast_vhub_req *req, + int status) +{ + bool internal = req->internal; + + EPVDBG(ep, "completing request @%p, status %d\n", req, status); + + list_del_init(&req->queue); + + if (req->req.status == -EINPROGRESS) + req->req.status = status; + + if (req->req.dma) { + if (!WARN_ON(!ep->dev)) + usb_gadget_unmap_request(&ep->dev->gadget, + &req->req, ep->epn.is_in); + req->req.dma = 0; + } + + /* + * If this isn't an internal EP0 request, call the core + * to call the gadget completion. + */ + if (!internal) { + spin_unlock(&ep->vhub->lock); + usb_gadget_giveback_request(&ep->ep, &req->req); + spin_lock(&ep->vhub->lock); + } +} + +void ast_vhub_nuke(struct ast_vhub_ep *ep, int status) +{ + struct ast_vhub_req *req; + + EPDBG(ep, "Nuking\n"); + + /* Beware, lock will be dropped & req-acquired by done() */ + while (!list_empty(&ep->queue)) { + req = list_first_entry(&ep->queue, struct ast_vhub_req, queue); + ast_vhub_done(ep, req, status); + } +} + +struct usb_request *ast_vhub_alloc_request(struct usb_ep *u_ep, + gfp_t gfp_flags) +{ + struct ast_vhub_req *req; + + req = kzalloc(sizeof(*req), gfp_flags); + if (!req) + return NULL; + return &req->req; +} + +void ast_vhub_free_request(struct usb_ep *u_ep, struct usb_request *u_req) +{ + struct ast_vhub_req *req = to_ast_req(u_req); + + kfree(req); +} + +static irqreturn_t ast_vhub_irq(int irq, void *data) +{ + struct ast_vhub *vhub = data; + irqreturn_t iret = IRQ_NONE; + u32 istat; + + /* Stale interrupt while tearing down */ + if (!vhub->ep0_bufs) + return IRQ_NONE; + + spin_lock(&vhub->lock); + + /* Read and ACK interrupts */ + istat = readl(vhub->regs + AST_VHUB_ISR); + if (!istat) + goto bail; + writel(istat, vhub->regs + AST_VHUB_ISR); + iret = IRQ_HANDLED; + + UDCVDBG(vhub, "irq status=%08x, ep_acks=%08x ep_nacks=%08x\n", + istat, + readl(vhub->regs + AST_VHUB_EP_ACK_ISR), + readl(vhub->regs + AST_VHUB_EP_NACK_ISR)); + + /* Handle generic EPs first */ + if (istat & VHUB_IRQ_EP_POOL_ACK_STALL) { + u32 i, ep_acks = readl(vhub->regs + AST_VHUB_EP_ACK_ISR); + writel(ep_acks, vhub->regs + AST_VHUB_EP_ACK_ISR); + + for (i = 0; ep_acks && i < AST_VHUB_NUM_GEN_EPs; i++) { + u32 mask = VHUB_EP_IRQ(i); + if (ep_acks & mask) { + ast_vhub_epn_ack_irq(&vhub->epns[i]); + ep_acks &= ~mask; + } + } + } + + /* Handle device interrupts */ + if (istat & (VHUB_IRQ_DEVICE1 | + VHUB_IRQ_DEVICE2 | + VHUB_IRQ_DEVICE3 | + VHUB_IRQ_DEVICE4 | + VHUB_IRQ_DEVICE5)) { + if (istat & VHUB_IRQ_DEVICE1) + ast_vhub_dev_irq(&vhub->ports[0].dev); + if (istat & VHUB_IRQ_DEVICE2) + ast_vhub_dev_irq(&vhub->ports[1].dev); + if (istat & VHUB_IRQ_DEVICE3) + ast_vhub_dev_irq(&vhub->ports[2].dev); + if (istat & VHUB_IRQ_DEVICE4) + ast_vhub_dev_irq(&vhub->ports[3].dev); + if (istat & VHUB_IRQ_DEVICE5) + ast_vhub_dev_irq(&vhub->ports[4].dev); + } + + /* Handle top-level vHub EP0 interrupts */ + if (istat & (VHUB_IRQ_HUB_EP0_OUT_ACK_STALL | + VHUB_IRQ_HUB_EP0_IN_ACK_STALL | + VHUB_IRQ_HUB_EP0_SETUP)) { + if (istat & VHUB_IRQ_HUB_EP0_IN_ACK_STALL) + ast_vhub_ep0_handle_ack(&vhub->ep0, true); + if (istat & VHUB_IRQ_HUB_EP0_OUT_ACK_STALL) + ast_vhub_ep0_handle_ack(&vhub->ep0, false); + if (istat & VHUB_IRQ_HUB_EP0_SETUP) + ast_vhub_ep0_handle_setup(&vhub->ep0); + } + + /* Various top level bus events */ + if (istat & (VHUB_IRQ_BUS_RESUME | + VHUB_IRQ_BUS_SUSPEND | + VHUB_IRQ_BUS_RESET)) { + if (istat & VHUB_IRQ_BUS_RESUME) + ast_vhub_hub_resume(vhub); + if (istat & VHUB_IRQ_BUS_SUSPEND) + ast_vhub_hub_suspend(vhub); + if (istat & VHUB_IRQ_BUS_RESET) + ast_vhub_hub_reset(vhub); + } + + bail: + spin_unlock(&vhub->lock); + return iret; +} + +void ast_vhub_init_hw(struct ast_vhub *vhub) +{ + u32 ctrl; + + UDCDBG(vhub,"(Re)Starting HW ...\n"); + + /* Enable PHY */ + ctrl = VHUB_CTRL_PHY_CLK | + VHUB_CTRL_PHY_RESET_DIS; + + /* + * We do *NOT* set the VHUB_CTRL_CLK_STOP_SUSPEND bit + * to stop the logic clock during suspend because + * it causes the registers to become inaccessible and + * we haven't yet figured out a good wayt to bring the + * controller back into life to issue a wakeup. + */ + + /* + * Set some ISO & split control bits according to Aspeed + * recommendation + * + * VHUB_CTRL_ISO_RSP_CTRL: When set tells the HW to respond + * with 0 bytes data packet to ISO IN endpoints when no data + * is available. + * + * VHUB_CTRL_SPLIT_IN: This makes a SOF complete a split IN + * transaction. + */ + ctrl |= VHUB_CTRL_ISO_RSP_CTRL | VHUB_CTRL_SPLIT_IN; + writel(ctrl, vhub->regs + AST_VHUB_CTRL); + udelay(1); + + /* Set descriptor ring size */ + if (AST_VHUB_DESCS_COUNT == 256) { + ctrl |= VHUB_CTRL_LONG_DESC; + writel(ctrl, vhub->regs + AST_VHUB_CTRL); + } else { + BUILD_BUG_ON(AST_VHUB_DESCS_COUNT != 32); + } + + /* Reset all devices */ + writel(VHUB_SW_RESET_ALL, vhub->regs + AST_VHUB_SW_RESET); + udelay(1); + writel(0, vhub->regs + AST_VHUB_SW_RESET); + + /* Disable and cleanup EP ACK/NACK interrupts */ + writel(0, vhub->regs + AST_VHUB_EP_ACK_IER); + writel(0, vhub->regs + AST_VHUB_EP_NACK_IER); + writel(VHUB_EP_IRQ_ALL, vhub->regs + AST_VHUB_EP_ACK_ISR); + writel(VHUB_EP_IRQ_ALL, vhub->regs + AST_VHUB_EP_NACK_ISR); + + /* Default settings for EP0, enable HW hub EP1 */ + writel(0, vhub->regs + AST_VHUB_EP0_CTRL); + writel(VHUB_EP1_CTRL_RESET_TOGGLE | + VHUB_EP1_CTRL_ENABLE, + vhub->regs + AST_VHUB_EP1_CTRL); + writel(0, vhub->regs + AST_VHUB_EP1_STS_CHG); + + /* Configure EP0 DMA buffer */ + writel(vhub->ep0.buf_dma, vhub->regs + AST_VHUB_EP0_DATA); + + /* Clear address */ + writel(0, vhub->regs + AST_VHUB_CONF); + + /* Pullup hub (activate on host) */ + if (vhub->force_usb1) + ctrl |= VHUB_CTRL_FULL_SPEED_ONLY; + + ctrl |= VHUB_CTRL_UPSTREAM_CONNECT; + writel(ctrl, vhub->regs + AST_VHUB_CTRL); + + /* Enable some interrupts */ + writel(VHUB_IRQ_HUB_EP0_IN_ACK_STALL | + VHUB_IRQ_HUB_EP0_OUT_ACK_STALL | + VHUB_IRQ_HUB_EP0_SETUP | + VHUB_IRQ_EP_POOL_ACK_STALL | + VHUB_IRQ_BUS_RESUME | + VHUB_IRQ_BUS_SUSPEND | + VHUB_IRQ_BUS_RESET, + vhub->regs + AST_VHUB_IER); +} + +static int ast_vhub_remove(struct platform_device *pdev) +{ + struct ast_vhub *vhub = platform_get_drvdata(pdev); + unsigned long flags; + int i; + + if (!vhub || !vhub->regs) + return 0; + + /* Remove devices */ + for (i = 0; i < AST_VHUB_NUM_PORTS; i++) + ast_vhub_del_dev(&vhub->ports[i].dev); + + spin_lock_irqsave(&vhub->lock, flags); + + /* Mask & ack all interrupts */ + writel(0, vhub->regs + AST_VHUB_IER); + writel(VHUB_IRQ_ACK_ALL, vhub->regs + AST_VHUB_ISR); + + /* Pull device, leave PHY enabled */ + writel(VHUB_CTRL_PHY_CLK | + VHUB_CTRL_PHY_RESET_DIS, + vhub->regs + AST_VHUB_CTRL); + + if (vhub->clk) + clk_disable_unprepare(vhub->clk); + + spin_unlock_irqrestore(&vhub->lock, flags); + + if (vhub->ep0_bufs) + dma_free_coherent(&pdev->dev, + AST_VHUB_EP0_MAX_PACKET * + (AST_VHUB_NUM_PORTS + 1), + vhub->ep0_bufs, + vhub->ep0_bufs_dma); + vhub->ep0_bufs = NULL; + + return 0; +} + +static int ast_vhub_probe(struct platform_device *pdev) +{ + enum usb_device_speed max_speed; + struct ast_vhub *vhub; + struct resource *res; + int i, rc = 0; + + vhub = devm_kzalloc(&pdev->dev, sizeof(*vhub), GFP_KERNEL); + if (!vhub) + return -ENOMEM; + + spin_lock_init(&vhub->lock); + vhub->pdev = pdev; + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + vhub->regs = devm_ioremap_resource(&pdev->dev, res); + if (IS_ERR(vhub->regs)) { + dev_err(&pdev->dev, "Failed to map resources\n"); + return PTR_ERR(vhub->regs); + } + UDCDBG(vhub, "vHub@%pR mapped @%p\n", res, vhub->regs); + + platform_set_drvdata(pdev, vhub); + + vhub->clk = devm_clk_get(&pdev->dev, NULL); + if (IS_ERR(vhub->clk)) { + rc = PTR_ERR(vhub->clk); + goto err; + } + rc = clk_prepare_enable(vhub->clk); + if (rc) { + dev_err(&pdev->dev, "Error couldn't enable clock (%d)\n", rc); + goto err; + } + + /* Check if we need to limit the HW to USB1 */ + max_speed = usb_get_maximum_speed(&pdev->dev); + if (max_speed != USB_SPEED_UNKNOWN && max_speed < USB_SPEED_HIGH) + vhub->force_usb1 = true; + + /* Mask & ack all interrupts before installing the handler */ + writel(0, vhub->regs + AST_VHUB_IER); + writel(VHUB_IRQ_ACK_ALL, vhub->regs + AST_VHUB_ISR); + + /* Find interrupt and install handler */ + vhub->irq = platform_get_irq(pdev, 0); + if (vhub->irq < 0) { + dev_err(&pdev->dev, "Failed to get interrupt\n"); + rc = vhub->irq; + goto err; + } + rc = devm_request_irq(&pdev->dev, vhub->irq, ast_vhub_irq, 0, + KBUILD_MODNAME, vhub); + if (rc) { + dev_err(&pdev->dev, "Failed to request interrupt\n"); + goto err; + } + + /* + * Allocate DMA buffers for all EP0s in one chunk, + * one per port and one for the vHub itself + */ + vhub->ep0_bufs = dma_alloc_coherent(&pdev->dev, + AST_VHUB_EP0_MAX_PACKET * + (AST_VHUB_NUM_PORTS + 1), + &vhub->ep0_bufs_dma, GFP_KERNEL); + if (!vhub->ep0_bufs) { + dev_err(&pdev->dev, "Failed to allocate EP0 DMA buffers\n"); + rc = -ENOMEM; + goto err; + } + UDCVDBG(vhub, "EP0 DMA buffers @%p (DMA 0x%08x)\n", + vhub->ep0_bufs, (u32)vhub->ep0_bufs_dma); + + /* Init vHub EP0 */ + ast_vhub_init_ep0(vhub, &vhub->ep0, NULL); + + /* Init devices */ + for (i = 0; i < AST_VHUB_NUM_PORTS && rc == 0; i++) + rc = ast_vhub_init_dev(vhub, i); + if (rc) + goto err; + + /* Init hub emulation */ + ast_vhub_init_hub(vhub); + + /* Initialize HW */ + ast_vhub_init_hw(vhub); + + dev_info(&pdev->dev, "Initialized virtual hub in USB%d mode\n", + vhub->force_usb1 ? 1 : 2); + + return 0; + err: + ast_vhub_remove(pdev); + return rc; +} + +static const struct of_device_id ast_vhub_dt_ids[] = { + { + .compatible = "aspeed,ast2400-usb-vhub", + }, + { + .compatible = "aspeed,ast2500-usb-vhub", + }, + { } +}; +MODULE_DEVICE_TABLE(of, ast_vhub_dt_ids); + +static struct platform_driver ast_vhub_driver = { + .probe = ast_vhub_probe, + .remove = ast_vhub_remove, + .driver = { + .name = KBUILD_MODNAME, + .of_match_table = ast_vhub_dt_ids, + }, +}; +module_platform_driver(ast_vhub_driver); + +MODULE_DESCRIPTION("Aspeed vHub udc driver"); +MODULE_AUTHOR("Benjamin Herrenschmidt "); +MODULE_LICENSE("GPL"); diff --git a/drivers/usb/gadget/udc/aspeed-vhub/dev.c b/drivers/usb/gadget/udc/aspeed-vhub/dev.c new file mode 100644 index 0000000..f0233912 --- /dev/null +++ b/drivers/usb/gadget/udc/aspeed-vhub/dev.c @@ -0,0 +1,589 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * aspeed-vhub -- Driver for Aspeed SoC "vHub" USB gadget + * + * dev.c - Individual device/gadget management (ie, a port = a gadget) + * + * Copyright 2017 IBM Corporation + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include "vhub.h" + +void ast_vhub_dev_irq(struct ast_vhub_dev *d) +{ + u32 istat = readl(d->regs + AST_VHUB_DEV_ISR); + + writel(istat, d->regs + AST_VHUB_DEV_ISR); + + if (istat & VHUV_DEV_IRQ_EP0_IN_ACK_STALL) + ast_vhub_ep0_handle_ack(&d->ep0, true); + if (istat & VHUV_DEV_IRQ_EP0_OUT_ACK_STALL) + ast_vhub_ep0_handle_ack(&d->ep0, false); + if (istat & VHUV_DEV_IRQ_EP0_SETUP) + ast_vhub_ep0_handle_setup(&d->ep0); +} + +static void ast_vhub_dev_enable(struct ast_vhub_dev *d) +{ + u32 reg, hmsk; + + if (d->enabled) + return; + + /* Enable device and its EP0 interrupts */ + reg = VHUB_DEV_EN_ENABLE_PORT | + VHUB_DEV_EN_EP0_IN_ACK_IRQEN | + VHUB_DEV_EN_EP0_OUT_ACK_IRQEN | + VHUB_DEV_EN_EP0_SETUP_IRQEN; + if (d->gadget.speed == USB_SPEED_HIGH) + reg |= VHUB_DEV_EN_SPEED_SEL_HIGH; + writel(reg, d->regs + AST_VHUB_DEV_EN_CTRL); + + /* Enable device interrupt in the hub as well */ + hmsk = VHUB_IRQ_DEVICE1 << d->index; + reg = readl(d->vhub->regs + AST_VHUB_IER); + reg |= hmsk; + writel(reg, d->vhub->regs + AST_VHUB_IER); + + /* Set EP0 DMA buffer address */ + writel(d->ep0.buf_dma, d->regs + AST_VHUB_DEV_EP0_DATA); + + d->enabled = true; +} + +static void ast_vhub_dev_disable(struct ast_vhub_dev *d) +{ + u32 reg, hmsk; + + if (!d->enabled) + return; + + /* Disable device interrupt in the hub */ + hmsk = VHUB_IRQ_DEVICE1 << d->index; + reg = readl(d->vhub->regs + AST_VHUB_IER); + reg &= ~hmsk; + writel(reg, d->vhub->regs + AST_VHUB_IER); + + /* Then disable device */ + writel(0, d->regs + AST_VHUB_DEV_EN_CTRL); + d->gadget.speed = USB_SPEED_UNKNOWN; + d->enabled = false; + d->suspended = false; +} + +static int ast_vhub_dev_feature(struct ast_vhub_dev *d, + u16 wIndex, u16 wValue, + bool is_set) +{ + DDBG(d, "%s_FEATURE(dev val=%02x)\n", + is_set ? "SET" : "CLEAR", wValue); + + if (wValue != USB_DEVICE_REMOTE_WAKEUP) + return std_req_driver; + + d->wakeup_en = is_set; + + return std_req_complete; +} + +static int ast_vhub_ep_feature(struct ast_vhub_dev *d, + u16 wIndex, u16 wValue, bool is_set) +{ + struct ast_vhub_ep *ep; + int ep_num; + + ep_num = wIndex & USB_ENDPOINT_NUMBER_MASK; + DDBG(d, "%s_FEATURE(ep%d val=%02x)\n", + is_set ? "SET" : "CLEAR", ep_num, wValue); + if (ep_num == 0) + return std_req_complete; + if (ep_num >= AST_VHUB_NUM_GEN_EPs || !d->epns[ep_num - 1]) + return std_req_stall; + if (wValue != USB_ENDPOINT_HALT) + return std_req_driver; + + ep = d->epns[ep_num - 1]; + if (WARN_ON(!ep)) + return std_req_stall; + + if (!ep->epn.enabled || !ep->ep.desc || ep->epn.is_iso || + ep->epn.is_in != !!(wIndex & USB_DIR_IN)) + return std_req_stall; + + DDBG(d, "%s stall on EP %d\n", + is_set ? "setting" : "clearing", ep_num); + ep->epn.stalled = is_set; + ast_vhub_update_epn_stall(ep); + + return std_req_complete; +} + +static int ast_vhub_dev_status(struct ast_vhub_dev *d, + u16 wIndex, u16 wValue) +{ + u8 st0; + + DDBG(d, "GET_STATUS(dev)\n"); + + st0 = d->gadget.is_selfpowered << USB_DEVICE_SELF_POWERED; + if (d->wakeup_en) + st0 |= 1 << USB_DEVICE_REMOTE_WAKEUP; + + return ast_vhub_simple_reply(&d->ep0, st0, 0); +} + +static int ast_vhub_ep_status(struct ast_vhub_dev *d, + u16 wIndex, u16 wValue) +{ + int ep_num = wIndex & USB_ENDPOINT_NUMBER_MASK; + struct ast_vhub_ep *ep; + u8 st0 = 0; + + DDBG(d, "GET_STATUS(ep%d)\n", ep_num); + + if (ep_num >= AST_VHUB_NUM_GEN_EPs) + return std_req_stall; + if (ep_num != 0) { + ep = d->epns[ep_num - 1]; + if (!ep) + return std_req_stall; + if (!ep->epn.enabled || !ep->ep.desc || ep->epn.is_iso || + ep->epn.is_in != !!(wIndex & USB_DIR_IN)) + return std_req_stall; + if (ep->epn.stalled) + st0 |= 1 << USB_ENDPOINT_HALT; + } + + return ast_vhub_simple_reply(&d->ep0, st0, 0); +} + +static void ast_vhub_dev_set_address(struct ast_vhub_dev *d, u8 addr) +{ + u32 reg; + + DDBG(d, "SET_ADDRESS: Got address %x\n", addr); + + reg = readl(d->regs + AST_VHUB_DEV_EN_CTRL); + reg &= ~VHUB_DEV_EN_ADDR_MASK; + reg |= VHUB_DEV_EN_SET_ADDR(addr); + writel(reg, d->regs + AST_VHUB_DEV_EN_CTRL); +} + +int ast_vhub_std_dev_request(struct ast_vhub_ep *ep, + struct usb_ctrlrequest *crq) +{ + struct ast_vhub_dev *d = ep->dev; + u16 wValue, wIndex; + + /* No driver, we shouldn't be enabled ... */ + if (!d->driver || !d->enabled || d->suspended) { + EPDBG(ep, + "Device is wrong state driver=%p enabled=%d" + " suspended=%d\n", + d->driver, d->enabled, d->suspended); + return std_req_stall; + } + + /* First packet, grab speed */ + if (d->gadget.speed == USB_SPEED_UNKNOWN) { + d->gadget.speed = ep->vhub->speed; + if (d->gadget.speed > d->driver->max_speed) + d->gadget.speed = d->driver->max_speed; + DDBG(d, "fist packet, captured speed %d\n", + d->gadget.speed); + } + + wValue = le16_to_cpu(crq->wValue); + wIndex = le16_to_cpu(crq->wIndex); + + switch ((crq->bRequestType << 8) | crq->bRequest) { + /* SET_ADDRESS */ + case DeviceOutRequest | USB_REQ_SET_ADDRESS: + ast_vhub_dev_set_address(d, wValue); + return std_req_complete; + + /* GET_STATUS */ + case DeviceRequest | USB_REQ_GET_STATUS: + return ast_vhub_dev_status(d, wIndex, wValue); + case InterfaceRequest | USB_REQ_GET_STATUS: + return ast_vhub_simple_reply(ep, 0, 0); + case EndpointRequest | USB_REQ_GET_STATUS: + return ast_vhub_ep_status(d, wIndex, wValue); + + /* SET/CLEAR_FEATURE */ + case DeviceOutRequest | USB_REQ_SET_FEATURE: + return ast_vhub_dev_feature(d, wIndex, wValue, true); + case DeviceOutRequest | USB_REQ_CLEAR_FEATURE: + return ast_vhub_dev_feature(d, wIndex, wValue, false); + case EndpointOutRequest | USB_REQ_SET_FEATURE: + return ast_vhub_ep_feature(d, wIndex, wValue, true); + case EndpointOutRequest | USB_REQ_CLEAR_FEATURE: + return ast_vhub_ep_feature(d, wIndex, wValue, false); + } + return std_req_driver; +} + +static int ast_vhub_udc_wakeup(struct usb_gadget* gadget) +{ + struct ast_vhub_dev *d = to_ast_dev(gadget); + unsigned long flags; + int rc = -EINVAL; + + spin_lock_irqsave(&d->vhub->lock, flags); + if (!d->wakeup_en) + goto err; + + DDBG(d, "Device initiated wakeup\n"); + + /* Wakeup the host */ + ast_vhub_hub_wake_all(d->vhub); + rc = 0; + err: + spin_unlock_irqrestore(&d->vhub->lock, flags); + return rc; +} + +static int ast_vhub_udc_get_frame(struct usb_gadget* gadget) +{ + struct ast_vhub_dev *d = to_ast_dev(gadget); + + return (readl(d->vhub->regs + AST_VHUB_USBSTS) >> 16) & 0x7ff; +} + +static void ast_vhub_dev_nuke(struct ast_vhub_dev *d) +{ + unsigned int i; + + for (i = 0; i < AST_VHUB_NUM_GEN_EPs; i++) { + if (!d->epns[i]) + continue; + ast_vhub_nuke(d->epns[i], -ESHUTDOWN); + } +} + +static int ast_vhub_udc_pullup(struct usb_gadget* gadget, int on) +{ + struct ast_vhub_dev *d = to_ast_dev(gadget); + unsigned long flags; + + spin_lock_irqsave(&d->vhub->lock, flags); + + DDBG(d, "pullup(%d)\n", on); + + /* Mark disconnected in the hub */ + ast_vhub_device_connect(d->vhub, d->index, on); + + /* + * If enabled, nuke all requests if any (there shouldn't be) + * and disable the port. This will clear the address too. + */ + if (d->enabled) { + ast_vhub_dev_nuke(d); + ast_vhub_dev_disable(d); + } + + spin_unlock_irqrestore(&d->vhub->lock, flags); + + return 0; +} + +static int ast_vhub_udc_start(struct usb_gadget *gadget, + struct usb_gadget_driver *driver) +{ + struct ast_vhub_dev *d = to_ast_dev(gadget); + unsigned long flags; + + spin_lock_irqsave(&d->vhub->lock, flags); + + DDBG(d, "start\n"); + + /* We don't do much more until the hub enables us */ + d->driver = driver; + d->gadget.is_selfpowered = 1; + + spin_unlock_irqrestore(&d->vhub->lock, flags); + + return 0; +} + +static struct usb_ep *ast_vhub_udc_match_ep(struct usb_gadget *gadget, + struct usb_endpoint_descriptor *desc, + struct usb_ss_ep_comp_descriptor *ss) +{ + struct ast_vhub_dev *d = to_ast_dev(gadget); + struct ast_vhub_ep *ep; + struct usb_ep *u_ep; + unsigned int max, addr, i; + + DDBG(d, "Match EP type %d\n", usb_endpoint_type(desc)); + + /* + * First we need to look for an existing unclaimed EP as another + * configuration may have already associated a bunch of EPs with + * this gadget. This duplicates the code in usb_ep_autoconfig_ss() + * unfortunately. + */ + list_for_each_entry(u_ep, &gadget->ep_list, ep_list) { + if (usb_gadget_ep_match_desc(gadget, u_ep, desc, ss)) { + DDBG(d, " -> using existing EP%d\n", + to_ast_ep(u_ep)->d_idx); + return u_ep; + } + } + + /* + * We didn't find one, we need to grab one from the pool. + * + * First let's do some sanity checking + */ + switch(usb_endpoint_type(desc)) { + case USB_ENDPOINT_XFER_CONTROL: + /* Only EP0 can be a control endpoint */ + return NULL; + case USB_ENDPOINT_XFER_ISOC: + /* ISO: limit 1023 bytes full speed, 1024 high/super speed */ + if (gadget_is_dualspeed(gadget)) + max = 1024; + else + max = 1023; + break; + case USB_ENDPOINT_XFER_BULK: + if (gadget_is_dualspeed(gadget)) + max = 512; + else + max = 64; + break; + case USB_ENDPOINT_XFER_INT: + if (gadget_is_dualspeed(gadget)) + max = 1024; + else + max = 64; + break; + } + if (usb_endpoint_maxp(desc) > max) + return NULL; + + /* + * Find a free EP address for that device. We can't + * let the generic code assign these as it would + * create overlapping numbers for IN and OUT which + * we don't support, so also create a suitable name + * that will allow the generic code to use our + * assigned address. + */ + for (i = 0; i < AST_VHUB_NUM_GEN_EPs; i++) + if (d->epns[i] == NULL) + break; + if (i >= AST_VHUB_NUM_GEN_EPs) + return NULL; + addr = i + 1; + + /* + * Now grab an EP from the shared pool and associate + * it with our device + */ + ep = ast_vhub_alloc_epn(d, addr); + if (!ep) + return NULL; + DDBG(d, "Allocated epn#%d for port EP%d\n", + ep->epn.g_idx, addr); + + return &ep->ep; +} + +static int ast_vhub_udc_stop(struct usb_gadget *gadget) +{ + struct ast_vhub_dev *d = to_ast_dev(gadget); + unsigned long flags; + + spin_lock_irqsave(&d->vhub->lock, flags); + + DDBG(d, "stop\n"); + + d->driver = NULL; + d->gadget.speed = USB_SPEED_UNKNOWN; + + ast_vhub_dev_nuke(d); + + if (d->enabled) + ast_vhub_dev_disable(d); + + spin_unlock_irqrestore(&d->vhub->lock, flags); + + return 0; +} + +static struct usb_gadget_ops ast_vhub_udc_ops = { + .get_frame = ast_vhub_udc_get_frame, + .wakeup = ast_vhub_udc_wakeup, + .pullup = ast_vhub_udc_pullup, + .udc_start = ast_vhub_udc_start, + .udc_stop = ast_vhub_udc_stop, + .match_ep = ast_vhub_udc_match_ep, +}; + +void ast_vhub_dev_suspend(struct ast_vhub_dev *d) +{ + d->suspended = true; + if (d->driver) { + spin_unlock(&d->vhub->lock); + d->driver->suspend(&d->gadget); + spin_lock(&d->vhub->lock); + } +} + +void ast_vhub_dev_resume(struct ast_vhub_dev *d) +{ + d->suspended = false; + if (d->driver) { + spin_unlock(&d->vhub->lock); + d->driver->resume(&d->gadget); + spin_lock(&d->vhub->lock); + } +} + +void ast_vhub_dev_reset(struct ast_vhub_dev *d) +{ + /* + * If speed is not set, we enable the port. If it is, + * send reset to the gadget and reset "speed". + * + * Speed is an indication that we have got the first + * setup packet to the device. + */ + if (d->gadget.speed == USB_SPEED_UNKNOWN && !d->enabled) { + DDBG(d, "Reset at unknown speed of disabled device, enabling...\n"); + ast_vhub_dev_enable(d); + d->suspended = false; + } + if (d->gadget.speed != USB_SPEED_UNKNOWN && d->driver) { + unsigned int i; + + DDBG(d, "Reset at known speed of bound device, resetting...\n"); + spin_unlock(&d->vhub->lock); + d->driver->reset(&d->gadget); + spin_lock(&d->vhub->lock); + + /* + * Disable/re-enable HW, this will clear the address + * and speed setting. + */ + ast_vhub_dev_disable(d); + ast_vhub_dev_enable(d); + + /* Clear stall on all EPs */ + for (i = 0; i < AST_VHUB_NUM_GEN_EPs; i++) { + struct ast_vhub_ep *ep = d->epns[i]; + + if (ep && ep->epn.stalled) { + ep->epn.stalled = false; + ast_vhub_update_epn_stall(ep); + } + } + + /* Additional cleanups */ + d->wakeup_en = false; + d->suspended = false; + } +} + +void ast_vhub_del_dev(struct ast_vhub_dev *d) +{ + unsigned long flags; + + spin_lock_irqsave(&d->vhub->lock, flags); + if (!d->registered) { + spin_unlock_irqrestore(&d->vhub->lock, flags); + return; + } + d->registered = false; + spin_unlock_irqrestore(&d->vhub->lock, flags); + + usb_del_gadget_udc(&d->gadget); + device_unregister(d->port_dev); +} + +static void ast_vhub_dev_release(struct device *dev) +{ + kfree(dev); +} + +int ast_vhub_init_dev(struct ast_vhub *vhub, unsigned int idx) +{ + struct ast_vhub_dev *d = &vhub->ports[idx].dev; + struct device *parent = &vhub->pdev->dev; + int rc; + + d->vhub = vhub; + d->index = idx; + d->name = devm_kasprintf(parent, GFP_KERNEL, "port%d", idx+1); + d->regs = vhub->regs + 0x100 + 0x10 * idx; + + ast_vhub_init_ep0(vhub, &d->ep0, d); + + /* + * The UDC core really needs us to have separate and uniquely + * named "parent" devices for each port so we create a sub device + * here for that purpose + */ + d->port_dev = kzalloc(sizeof(struct device), GFP_KERNEL); + if (!d->port_dev) + return -ENOMEM; + device_initialize(d->port_dev); + d->port_dev->release = ast_vhub_dev_release; + d->port_dev->parent = parent; + dev_set_name(d->port_dev, "%s:p%d", dev_name(parent), idx + 1); + rc = device_add(d->port_dev); + if (rc) + goto fail_add; + + /* Populate gadget */ + INIT_LIST_HEAD(&d->gadget.ep_list); + d->gadget.ops = &ast_vhub_udc_ops; + d->gadget.ep0 = &d->ep0.ep; + d->gadget.name = KBUILD_MODNAME; + if (vhub->force_usb1) + d->gadget.max_speed = USB_SPEED_FULL; + else + d->gadget.max_speed = USB_SPEED_HIGH; + d->gadget.speed = USB_SPEED_UNKNOWN; + d->gadget.dev.of_node = vhub->pdev->dev.of_node; + + rc = usb_add_gadget_udc(d->port_dev, &d->gadget); + if (rc != 0) + goto fail_udc; + d->registered = true; + + return 0; + fail_udc: + device_del(d->port_dev); + fail_add: + put_device(d->port_dev); + + return rc; +} diff --git a/drivers/usb/gadget/udc/aspeed-vhub/ep0.c b/drivers/usb/gadget/udc/aspeed-vhub/ep0.c new file mode 100644 index 0000000..20ffb03 --- /dev/null +++ b/drivers/usb/gadget/udc/aspeed-vhub/ep0.c @@ -0,0 +1,486 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * aspeed-vhub -- Driver for Aspeed SoC "vHub" USB gadget + * + * ep0.c - Endpoint 0 handling + * + * Copyright 2017 IBM Corporation + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include "vhub.h" + +int ast_vhub_reply(struct ast_vhub_ep *ep, char *ptr, int len) +{ + struct usb_request *req = &ep->ep0.req.req; + int rc; + + if (WARN_ON(ep->d_idx != 0)) + return std_req_stall; + if (WARN_ON(!ep->ep0.dir_in)) + return std_req_stall; + if (WARN_ON(len > AST_VHUB_EP0_MAX_PACKET)) + return std_req_stall; + if (WARN_ON(req->status == -EINPROGRESS)) + return std_req_stall; + + req->buf = ptr; + req->length = len; + req->complete = NULL; + req->zero = true; + + /* + * Call internal queue directly after dropping the lock. This is + * safe to do as the reply is always the last thing done when + * processing a SETUP packet, usually as a tail call + */ + spin_unlock(&ep->vhub->lock); + if (ep->ep.ops->queue(&ep->ep, req, GFP_ATOMIC)) + rc = std_req_stall; + else + rc = std_req_data; + spin_lock(&ep->vhub->lock); + return rc; +} + +int __ast_vhub_simple_reply(struct ast_vhub_ep *ep, int len, ...) +{ + u8 *buffer = ep->buf; + unsigned int i; + va_list args; + + va_start(args, len); + + /* Copy data directly into EP buffer */ + for (i = 0; i < len; i++) + buffer[i] = va_arg(args, int); + va_end(args); + + /* req->buf NULL means data is already there */ + return ast_vhub_reply(ep, NULL, len); +} + +void ast_vhub_ep0_handle_setup(struct ast_vhub_ep *ep) +{ + struct usb_ctrlrequest crq; + enum std_req_rc std_req_rc; + int rc = -ENODEV; + + if (WARN_ON(ep->d_idx != 0)) + return; + + /* + * Grab the setup packet from the chip and byteswap + * interesting fields + */ + memcpy_fromio(&crq, ep->ep0.setup, sizeof(crq)); + + EPDBG(ep, "SETUP packet %02x/%02x/%04x/%04x/%04x [%s] st=%d\n", + crq.bRequestType, crq.bRequest, + le16_to_cpu(crq.wValue), + le16_to_cpu(crq.wIndex), + le16_to_cpu(crq.wLength), + (crq.bRequestType & USB_DIR_IN) ? "in" : "out", + ep->ep0.state); + + /* Check our state, cancel pending requests if needed */ + if (ep->ep0.state != ep0_state_token) { + EPDBG(ep, "wrong state\n"); + ast_vhub_nuke(ep, 0); + goto stall; + } + + /* Calculate next state for EP0 */ + ep->ep0.state = ep0_state_data; + ep->ep0.dir_in = !!(crq.bRequestType & USB_DIR_IN); + + /* If this is the vHub, we handle requests differently */ + std_req_rc = std_req_driver; + if (ep->dev == NULL) { + if ((crq.bRequestType & USB_TYPE_MASK) == USB_TYPE_STANDARD) + std_req_rc = ast_vhub_std_hub_request(ep, &crq); + else if ((crq.bRequestType & USB_TYPE_MASK) == USB_TYPE_CLASS) + std_req_rc = ast_vhub_class_hub_request(ep, &crq); + else + std_req_rc = std_req_stall; + } else if ((crq.bRequestType & USB_TYPE_MASK) == USB_TYPE_STANDARD) + std_req_rc = ast_vhub_std_dev_request(ep, &crq); + + /* Act upon result */ + switch(std_req_rc) { + case std_req_complete: + goto complete; + case std_req_stall: + goto stall; + case std_req_driver: + break; + case std_req_data: + return; + } + + /* Pass request up to the gadget driver */ + if (WARN_ON(!ep->dev)) + goto stall; + if (ep->dev->driver) { + EPDBG(ep, "forwarding to gadget...\n"); + spin_unlock(&ep->vhub->lock); + rc = ep->dev->driver->setup(&ep->dev->gadget, &crq); + spin_lock(&ep->vhub->lock); + EPDBG(ep, "driver returned %d\n", rc); + } else { + EPDBG(ep, "no gadget for request !\n"); + } + if (rc >= 0) + return; + + stall: + EPDBG(ep, "stalling\n"); + writel(VHUB_EP0_CTRL_STALL, ep->ep0.ctlstat); + ep->ep0.state = ep0_state_status; + ep->ep0.dir_in = false; + return; + + complete: + EPVDBG(ep, "sending [in] status with no data\n"); + writel(VHUB_EP0_TX_BUFF_RDY, ep->ep0.ctlstat); + ep->ep0.state = ep0_state_status; + ep->ep0.dir_in = false; +} + + +static void ast_vhub_ep0_do_send(struct ast_vhub_ep *ep, + struct ast_vhub_req *req) +{ + unsigned int chunk; + u32 reg; + + /* If this is a 0-length request, it's the gadget trying to + * send a status on our behalf. We take it from here. + */ + if (req->req.length == 0) + req->last_desc = 1; + + /* Are we done ? Complete request, otherwise wait for next interrupt */ + if (req->last_desc >= 0) { + EPVDBG(ep, "complete send %d/%d\n", + req->req.actual, req->req.length); + ep->ep0.state = ep0_state_status; + writel(VHUB_EP0_RX_BUFF_RDY, ep->ep0.ctlstat); + ast_vhub_done(ep, req, 0); + return; + } + + /* + * Next chunk cropped to max packet size. Also check if this + * is the last packet + */ + chunk = req->req.length - req->req.actual; + if (chunk > ep->ep.maxpacket) + chunk = ep->ep.maxpacket; + else if ((chunk < ep->ep.maxpacket) || !req->req.zero) + req->last_desc = 1; + + EPVDBG(ep, "send chunk=%d last=%d, req->act=%d mp=%d\n", + chunk, req->last_desc, req->req.actual, ep->ep.maxpacket); + + /* + * Copy data if any (internal requests already have data + * in the EP buffer) + */ + if (chunk && req->req.buf) + memcpy(ep->buf, req->req.buf + req->req.actual, chunk); + + /* Remember chunk size and trigger send */ + reg = VHUB_EP0_SET_TX_LEN(chunk); + writel(reg, ep->ep0.ctlstat); + writel(reg | VHUB_EP0_TX_BUFF_RDY, ep->ep0.ctlstat); + req->req.actual += chunk; +} + +static void ast_vhub_ep0_rx_prime(struct ast_vhub_ep *ep) +{ + EPVDBG(ep, "rx prime\n"); + + /* Prime endpoint for receiving data */ + writel(VHUB_EP0_RX_BUFF_RDY, ep->ep0.ctlstat + AST_VHUB_EP0_CTRL); +} + +static void ast_vhub_ep0_do_receive(struct ast_vhub_ep *ep, struct ast_vhub_req *req, + unsigned int len) +{ + unsigned int remain; + int rc = 0; + + /* We are receiving... grab request */ + remain = req->req.length - req->req.actual; + + EPVDBG(ep, "receive got=%d remain=%d\n", len, remain); + + /* Are we getting more than asked ? */ + if (len > remain) { + EPDBG(ep, "receiving too much (ovf: %d) !\n", + len - remain); + len = remain; + rc = -EOVERFLOW; + } + if (len && req->req.buf) + memcpy(req->req.buf + req->req.actual, ep->buf, len); + req->req.actual += len; + + /* Done ? */ + if (len < ep->ep.maxpacket || len == remain) { + ep->ep0.state = ep0_state_status; + writel(VHUB_EP0_TX_BUFF_RDY, ep->ep0.ctlstat); + ast_vhub_done(ep, req, rc); + } else + ast_vhub_ep0_rx_prime(ep); +} + +void ast_vhub_ep0_handle_ack(struct ast_vhub_ep *ep, bool in_ack) +{ + struct ast_vhub_req *req; + struct ast_vhub *vhub = ep->vhub; + struct device *dev = &vhub->pdev->dev; + bool stall = false; + u32 stat; + + /* Read EP0 status */ + stat = readl(ep->ep0.ctlstat); + + /* Grab current request if any */ + req = list_first_entry_or_null(&ep->queue, struct ast_vhub_req, queue); + + EPVDBG(ep, "ACK status=%08x,state=%d is_in=%d in_ack=%d req=%p\n", + stat, ep->ep0.state, ep->ep0.dir_in, in_ack, req); + + switch(ep->ep0.state) { + case ep0_state_token: + /* There should be no request queued in that state... */ + if (req) { + dev_warn(dev, "request present while in TOKEN state\n"); + ast_vhub_nuke(ep, -EINVAL); + } + dev_warn(dev, "ack while in TOKEN state\n"); + stall = true; + break; + case ep0_state_data: + /* Check the state bits corresponding to our direction */ + if ((ep->ep0.dir_in && (stat & VHUB_EP0_TX_BUFF_RDY)) || + (!ep->ep0.dir_in && (stat & VHUB_EP0_RX_BUFF_RDY)) || + (ep->ep0.dir_in != in_ack)) { + dev_warn(dev, "irq state mismatch"); + stall = true; + break; + } + /* + * We are in data phase and there's no request, something is + * wrong, stall + */ + if (!req) { + dev_warn(dev, "data phase, no request\n"); + stall = true; + break; + } + + /* We have a request, handle data transfers */ + if (ep->ep0.dir_in) + ast_vhub_ep0_do_send(ep, req); + else + ast_vhub_ep0_do_receive(ep, req, VHUB_EP0_RX_LEN(stat)); + return; + case ep0_state_status: + /* Nuke stale requests */ + if (req) { + dev_warn(dev, "request present while in STATUS state\n"); + ast_vhub_nuke(ep, -EINVAL); + } + + /* + * If the status phase completes with the wrong ack, stall + * the endpoint just in case, to abort whatever the host + * was doing. + */ + if (ep->ep0.dir_in == in_ack) { + dev_warn(dev, "status direction mismatch\n"); + stall = true; + } + } + + /* Reset to token state */ + ep->ep0.state = ep0_state_token; + if (stall) + writel(VHUB_EP0_CTRL_STALL, ep->ep0.ctlstat); +} + +static int ast_vhub_ep0_queue(struct usb_ep* u_ep, struct usb_request *u_req, + gfp_t gfp_flags) +{ + struct ast_vhub_req *req = to_ast_req(u_req); + struct ast_vhub_ep *ep = to_ast_ep(u_ep); + struct ast_vhub *vhub = ep->vhub; + struct device *dev = &vhub->pdev->dev; + unsigned long flags; + + /* Paranoid cheks */ + if (!u_req || (!u_req->complete && !req->internal)) { + dev_warn(dev, "Bogus EP0 request ! u_req=%p\n", u_req); + if (u_req) { + dev_warn(dev, "complete=%p internal=%d\n", + u_req->complete, req->internal); + } + return -EINVAL; + } + + /* Not endpoint 0 ? */ + if (WARN_ON(ep->d_idx != 0)) + return -EINVAL; + + /* Disabled device */ + if (ep->dev && (!ep->dev->enabled || ep->dev->suspended)) + return -ESHUTDOWN; + + /* Data, no buffer and not internal ? */ + if (u_req->length && !u_req->buf && !req->internal) { + dev_warn(dev, "Request with no buffer !\n"); + return -EINVAL; + } + + EPVDBG(ep, "enqueue req @%p\n", req); + EPVDBG(ep, " l=%d zero=%d noshort=%d is_in=%d\n", + u_req->length, u_req->zero, + u_req->short_not_ok, ep->ep0.dir_in); + + /* Initialize request progress fields */ + u_req->status = -EINPROGRESS; + u_req->actual = 0; + req->last_desc = -1; + req->active = false; + + spin_lock_irqsave(&vhub->lock, flags); + + /* EP0 can only support a single request at a time */ + if (!list_empty(&ep->queue) || ep->ep0.state == ep0_state_token) { + dev_warn(dev, "EP0: Request in wrong state\n"); + spin_unlock_irqrestore(&vhub->lock, flags); + return -EBUSY; + } + + /* Add request to list and kick processing if empty */ + list_add_tail(&req->queue, &ep->queue); + + if (ep->ep0.dir_in) { + /* IN request, send data */ + ast_vhub_ep0_do_send(ep, req); + } else if (u_req->length == 0) { + /* 0-len request, send completion as rx */ + EPVDBG(ep, "0-length rx completion\n"); + ep->ep0.state = ep0_state_status; + writel(VHUB_EP0_TX_BUFF_RDY, ep->ep0.ctlstat); + ast_vhub_done(ep, req, 0); + } else { + /* OUT request, start receiver */ + ast_vhub_ep0_rx_prime(ep); + } + + spin_unlock_irqrestore(&vhub->lock, flags); + + return 0; +} + +static int ast_vhub_ep0_dequeue(struct usb_ep* u_ep, struct usb_request *u_req) +{ + struct ast_vhub_ep *ep = to_ast_ep(u_ep); + struct ast_vhub *vhub = ep->vhub; + struct ast_vhub_req *req; + unsigned long flags; + int rc = -EINVAL; + + spin_lock_irqsave(&vhub->lock, flags); + + /* Only one request can be in the queue */ + req = list_first_entry_or_null(&ep->queue, struct ast_vhub_req, queue); + + /* Is it ours ? */ + if (req && u_req == &req->req) { + EPVDBG(ep, "dequeue req @%p\n", req); + + /* + * We don't have to deal with "active" as all + * DMAs go to the EP buffers, not the request. + */ + ast_vhub_done(ep, req, -ECONNRESET); + + /* We do stall the EP to clean things up in HW */ + writel(VHUB_EP0_CTRL_STALL, ep->ep0.ctlstat); + ep->ep0.state = ep0_state_status; + ep->ep0.dir_in = false; + rc = 0; + } + spin_unlock_irqrestore(&vhub->lock, flags); + return rc; +} + + +static const struct usb_ep_ops ast_vhub_ep0_ops = { + .queue = ast_vhub_ep0_queue, + .dequeue = ast_vhub_ep0_dequeue, + .alloc_request = ast_vhub_alloc_request, + .free_request = ast_vhub_free_request, +}; + +void ast_vhub_init_ep0(struct ast_vhub *vhub, struct ast_vhub_ep *ep, + struct ast_vhub_dev *dev) +{ + memset(ep, 0, sizeof(*ep)); + + INIT_LIST_HEAD(&ep->ep.ep_list); + INIT_LIST_HEAD(&ep->queue); + ep->ep.ops = &ast_vhub_ep0_ops; + ep->ep.name = "ep0"; + ep->ep.caps.type_control = true; + usb_ep_set_maxpacket_limit(&ep->ep, AST_VHUB_EP0_MAX_PACKET); + ep->d_idx = 0; + ep->dev = dev; + ep->vhub = vhub; + ep->ep0.state = ep0_state_token; + INIT_LIST_HEAD(&ep->ep0.req.queue); + ep->ep0.req.internal = true; + + /* Small difference between vHub and devices */ + if (dev) { + ep->ep0.ctlstat = dev->regs + AST_VHUB_DEV_EP0_CTRL; + ep->ep0.setup = vhub->regs + + AST_VHUB_SETUP0 + 8 * (dev->index + 1); + ep->buf = vhub->ep0_bufs + + AST_VHUB_EP0_MAX_PACKET * (dev->index + 1); + ep->buf_dma = vhub->ep0_bufs_dma + + AST_VHUB_EP0_MAX_PACKET * (dev->index + 1); + } else { + ep->ep0.ctlstat = vhub->regs + AST_VHUB_EP0_CTRL; + ep->ep0.setup = vhub->regs + AST_VHUB_SETUP0; + ep->buf = vhub->ep0_bufs; + ep->buf_dma = vhub->ep0_bufs_dma; + } +} diff --git a/drivers/usb/gadget/udc/aspeed-vhub/epn.c b/drivers/usb/gadget/udc/aspeed-vhub/epn.c new file mode 100644 index 0000000..80c9fea --- /dev/null +++ b/drivers/usb/gadget/udc/aspeed-vhub/epn.c @@ -0,0 +1,843 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * aspeed-vhub -- Driver for Aspeed SoC "vHub" USB gadget + * + * epn.c - Generic endpoints management + * + * Copyright 2017 IBM Corporation + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include "vhub.h" + +#define EXTRA_CHECKS + +#ifdef EXTRA_CHECKS +#define CHECK(ep, expr, fmt...) \ + do { \ + if (!(expr)) EPDBG(ep, "CHECK:" fmt); \ + } while(0) +#else +#define CHECK(ep, expr, fmt...) do { } while(0) +#endif + +static void ast_vhub_epn_kick(struct ast_vhub_ep *ep, struct ast_vhub_req *req) +{ + unsigned int act = req->req.actual; + unsigned int len = req->req.length; + unsigned int chunk; + + /* There should be no DMA ongoing */ + WARN_ON(req->active); + + /* Calculate next chunk size */ + chunk = len - act; + if (chunk > ep->ep.maxpacket) + chunk = ep->ep.maxpacket; + else if ((chunk < ep->ep.maxpacket) || !req->req.zero) + req->last_desc = 1; + + EPVDBG(ep, "kick req %p act=%d/%d chunk=%d last=%d\n", + req, act, len, chunk, req->last_desc); + + /* If DMA unavailable, using staging EP buffer */ + if (!req->req.dma) { + + /* For IN transfers, copy data over first */ + if (ep->epn.is_in) + memcpy(ep->buf, req->req.buf + act, chunk); + writel(ep->buf_dma, ep->epn.regs + AST_VHUB_EP_DESC_BASE); + } else + writel(req->req.dma + act, ep->epn.regs + AST_VHUB_EP_DESC_BASE); + + /* Start DMA */ + req->active = true; + writel(VHUB_EP_DMA_SET_TX_SIZE(chunk), + ep->epn.regs + AST_VHUB_EP_DESC_STATUS); + writel(VHUB_EP_DMA_SET_TX_SIZE(chunk) | VHUB_EP_DMA_SINGLE_KICK, + ep->epn.regs + AST_VHUB_EP_DESC_STATUS); +} + +static void ast_vhub_epn_handle_ack(struct ast_vhub_ep *ep) +{ + struct ast_vhub_req *req; + unsigned int len; + u32 stat; + + /* Read EP status */ + stat = readl(ep->epn.regs + AST_VHUB_EP_DESC_STATUS); + + /* Grab current request if any */ + req = list_first_entry_or_null(&ep->queue, struct ast_vhub_req, queue); + + EPVDBG(ep, "ACK status=%08x is_in=%d, req=%p (active=%d)\n", + stat, ep->epn.is_in, req, req ? req->active : 0); + + /* In absence of a request, bail out, must have been dequeued */ + if (!req) + return; + + /* + * Request not active, move on to processing queue, active request + * was probably dequeued + */ + if (!req->active) + goto next_chunk; + + /* Check if HW has moved on */ + if (VHUB_EP_DMA_RPTR(stat) != 0) { + EPDBG(ep, "DMA read pointer not 0 !\n"); + return; + } + + /* No current DMA ongoing */ + req->active = false; + + /* Grab lenght out of HW */ + len = VHUB_EP_DMA_TX_SIZE(stat); + + /* If not using DMA, copy data out if needed */ + if (!req->req.dma && !ep->epn.is_in && len) + memcpy(req->req.buf + req->req.actual, ep->buf, len); + + /* Adjust size */ + req->req.actual += len; + + /* Check for short packet */ + if (len < ep->ep.maxpacket) + req->last_desc = 1; + + /* That's it ? complete the request and pick a new one */ + if (req->last_desc >= 0) { + ast_vhub_done(ep, req, 0); + req = list_first_entry_or_null(&ep->queue, struct ast_vhub_req, + queue); + + /* + * Due to lock dropping inside "done" the next request could + * already be active, so check for that and bail if needed. + */ + if (!req || req->active) + return; + } + + next_chunk: + ast_vhub_epn_kick(ep, req); +} + +static inline unsigned int ast_vhub_count_free_descs(struct ast_vhub_ep *ep) +{ + /* + * d_next == d_last means descriptor list empty to HW, + * thus we can only have AST_VHUB_DESCS_COUNT-1 descriptors + * in the list + */ + return (ep->epn.d_last + AST_VHUB_DESCS_COUNT - ep->epn.d_next - 1) & + (AST_VHUB_DESCS_COUNT - 1); +} + +static void ast_vhub_epn_kick_desc(struct ast_vhub_ep *ep, + struct ast_vhub_req *req) +{ + unsigned int act = req->act_count; + unsigned int len = req->req.length; + unsigned int chunk; + + /* Mark request active if not already */ + req->active = true; + + /* If the request was already completely written, do nothing */ + if (req->last_desc >= 0) + return; + + EPVDBG(ep, "kick act=%d/%d chunk_max=%d free_descs=%d\n", + act, len, ep->epn.chunk_max, ast_vhub_count_free_descs(ep)); + + /* While we can create descriptors */ + while (ast_vhub_count_free_descs(ep) && req->last_desc < 0) { + struct ast_vhub_desc *desc; + unsigned int d_num; + + /* Grab next free descriptor */ + d_num = ep->epn.d_next; + desc = &ep->epn.descs[d_num]; + ep->epn.d_next = (d_num + 1) & (AST_VHUB_DESCS_COUNT - 1); + + /* Calculate next chunk size */ + chunk = len - act; + if (chunk <= ep->epn.chunk_max) { + /* + * Is this the last packet ? Because of having up to 8 + * packets in a descriptor we can't just compare "chunk" + * with ep.maxpacket. We have to see if it's a multiple + * of it to know if we have to send a zero packet. + * Sadly that involves a modulo which is a bit expensive + * but probably still better than not doing it. + */ + if (!chunk || !req->req.zero || (chunk % ep->ep.maxpacket) != 0) + req->last_desc = d_num; + } else { + chunk = ep->epn.chunk_max; + } + + EPVDBG(ep, " chunk: act=%d/%d chunk=%d last=%d desc=%d free=%d\n", + act, len, chunk, req->last_desc, d_num, + ast_vhub_count_free_descs(ep)); + + /* Populate descriptor */ + desc->w0 = cpu_to_le32(req->req.dma + act); + + /* Interrupt if end of request or no more descriptors */ + + /* + * TODO: Be smarter about it, if we don't have enough + * descriptors request an interrupt before queue empty + * or so in order to be able to populate more before + * the HW runs out. This isn't a problem at the moment + * as we use 256 descriptors and only put at most one + * request in the ring. + */ + desc->w1 = cpu_to_le32(VHUB_DSC1_IN_SET_LEN(chunk)); + if (req->last_desc >= 0 || !ast_vhub_count_free_descs(ep)) + desc->w1 |= cpu_to_le32(VHUB_DSC1_IN_INTERRUPT); + + /* Account packet */ + req->act_count = act = act + chunk; + } + + /* Tell HW about new descriptors */ + writel(VHUB_EP_DMA_SET_CPU_WPTR(ep->epn.d_next), + ep->epn.regs + AST_VHUB_EP_DESC_STATUS); + + EPVDBG(ep, "HW kicked, d_next=%d dstat=%08x\n", + ep->epn.d_next, readl(ep->epn.regs + AST_VHUB_EP_DESC_STATUS)); +} + +static void ast_vhub_epn_handle_ack_desc(struct ast_vhub_ep *ep) +{ + struct ast_vhub_req *req; + unsigned int len, d_last; + u32 stat, stat1; + + /* Read EP status, workaround HW race */ + do { + stat = readl(ep->epn.regs + AST_VHUB_EP_DESC_STATUS); + stat1 = readl(ep->epn.regs + AST_VHUB_EP_DESC_STATUS); + } while(stat != stat1); + + /* Extract RPTR */ + d_last = VHUB_EP_DMA_RPTR(stat); + + /* Grab current request if any */ + req = list_first_entry_or_null(&ep->queue, struct ast_vhub_req, queue); + + EPVDBG(ep, "ACK status=%08x is_in=%d ep->d_last=%d..%d\n", + stat, ep->epn.is_in, ep->epn.d_last, d_last); + + /* Check all completed descriptors */ + while (ep->epn.d_last != d_last) { + struct ast_vhub_desc *desc; + unsigned int d_num; + bool is_last_desc; + + /* Grab next completed descriptor */ + d_num = ep->epn.d_last; + desc = &ep->epn.descs[d_num]; + ep->epn.d_last = (d_num + 1) & (AST_VHUB_DESCS_COUNT - 1); + + /* Grab len out of descriptor */ + len = VHUB_DSC1_IN_LEN(le32_to_cpu(desc->w1)); + + EPVDBG(ep, " desc %d len=%d req=%p (act=%d)\n", + d_num, len, req, req ? req->active : 0); + + /* If no active request pending, move on */ + if (!req || !req->active) + continue; + + /* Adjust size */ + req->req.actual += len; + + /* Is that the last chunk ? */ + is_last_desc = req->last_desc == d_num; + CHECK(ep, is_last_desc == (len < ep->ep.maxpacket || + (req->req.actual >= req->req.length && + !req->req.zero)), + "Last packet discrepancy: last_desc=%d len=%d r.act=%d " + "r.len=%d r.zero=%d mp=%d\n", + is_last_desc, len, req->req.actual, req->req.length, + req->req.zero, ep->ep.maxpacket); + + if (is_last_desc) { + /* + * Because we can only have one request at a time + * in our descriptor list in this implementation, + * d_last and ep->d_last should now be equal + */ + CHECK(ep, d_last == ep->epn.d_last, + "DMA read ptr mismatch %d vs %d\n", + d_last, ep->epn.d_last); + + /* Note: done will drop and re-acquire the lock */ + ast_vhub_done(ep, req, 0); + req = list_first_entry_or_null(&ep->queue, + struct ast_vhub_req, + queue); + break; + } + } + + /* More work ? */ + if (req) + ast_vhub_epn_kick_desc(ep, req); +} + +void ast_vhub_epn_ack_irq(struct ast_vhub_ep *ep) +{ + if (ep->epn.desc_mode) + ast_vhub_epn_handle_ack_desc(ep); + else + ast_vhub_epn_handle_ack(ep); +} + +static int ast_vhub_epn_queue(struct usb_ep* u_ep, struct usb_request *u_req, + gfp_t gfp_flags) +{ + struct ast_vhub_req *req = to_ast_req(u_req); + struct ast_vhub_ep *ep = to_ast_ep(u_ep); + struct ast_vhub *vhub = ep->vhub; + unsigned long flags; + bool empty; + int rc; + + /* Paranoid checks */ + if (!u_req || !u_req->complete || !u_req->buf) { + dev_warn(&vhub->pdev->dev, "Bogus EPn request ! u_req=%p\n", u_req); + if (u_req) { + dev_warn(&vhub->pdev->dev, "complete=%p internal=%d\n", + u_req->complete, req->internal); + } + return -EINVAL; + } + + /* Endpoint enabled ? */ + if (!ep->epn.enabled || !u_ep->desc || !ep->dev || !ep->d_idx || + !ep->dev->enabled || ep->dev->suspended) { + EPDBG(ep,"Enqueing request on wrong or disabled EP\n"); + return -ESHUTDOWN; + } + + /* Map request for DMA if possible. For now, the rule for DMA is + * that: + * + * * For single stage mode (no descriptors): + * + * - The buffer is aligned to a 8 bytes boundary (HW requirement) + * - For a OUT endpoint, the request size is a multiple of the EP + * packet size (otherwise the controller will DMA past the end + * of the buffer if the host is sending a too long packet). + * + * * For descriptor mode (tx only for now), always. + * + * We could relax the latter by making the decision to use the bounce + * buffer based on the size of a given *segment* of the request rather + * than the whole request. + */ + if (ep->epn.desc_mode || + ((((unsigned long)u_req->buf & 7) == 0) && + (ep->epn.is_in || !(u_req->length & (u_ep->maxpacket - 1))))) { + rc = usb_gadget_map_request(&ep->dev->gadget, u_req, + ep->epn.is_in); + if (rc) { + dev_warn(&vhub->pdev->dev, + "Request mapping failure %d\n", rc); + return rc; + } + } else + u_req->dma = 0; + + EPVDBG(ep, "enqueue req @%p\n", req); + EPVDBG(ep, " l=%d dma=0x%x zero=%d noshort=%d noirq=%d is_in=%d\n", + u_req->length, (u32)u_req->dma, u_req->zero, + u_req->short_not_ok, u_req->no_interrupt, + ep->epn.is_in); + + /* Initialize request progress fields */ + u_req->status = -EINPROGRESS; + u_req->actual = 0; + req->act_count = 0; + req->active = false; + req->last_desc = -1; + spin_lock_irqsave(&vhub->lock, flags); + empty = list_empty(&ep->queue); + + /* Add request to list and kick processing if empty */ + list_add_tail(&req->queue, &ep->queue); + if (empty) { + if (ep->epn.desc_mode) + ast_vhub_epn_kick_desc(ep, req); + else + ast_vhub_epn_kick(ep, req); + } + spin_unlock_irqrestore(&vhub->lock, flags); + + return 0; +} + +static void ast_vhub_stop_active_req(struct ast_vhub_ep *ep, + bool restart_ep) +{ + u32 state, reg, loops; + + /* Stop DMA activity */ + writel(0, ep->epn.regs + AST_VHUB_EP_DMA_CTLSTAT); + + /* Wait for it to complete */ + for (loops = 0; loops < 1000; loops++) { + state = readl(ep->epn.regs + AST_VHUB_EP_DMA_CTLSTAT); + state = VHUB_EP_DMA_PROC_STATUS(state); + if (state == EP_DMA_PROC_RX_IDLE || + state == EP_DMA_PROC_TX_IDLE) + break; + udelay(1); + } + if (loops >= 1000) + dev_warn(&ep->vhub->pdev->dev, "Timeout waiting for DMA\n"); + + /* If we don't have to restart the endpoint, that's it */ + if (!restart_ep) + return; + + /* Restart the endpoint */ + if (ep->epn.desc_mode) { + /* + * Take out descriptors by resetting the DMA read + * pointer to be equal to the CPU write pointer. + * + * Note: If we ever support creating descriptors for + * requests that aren't the head of the queue, we + * may have to do something more complex here, + * especially if the request being taken out is + * not the current head descriptors. + */ + reg = VHUB_EP_DMA_SET_RPTR(ep->epn.d_next) | + VHUB_EP_DMA_SET_CPU_WPTR(ep->epn.d_next); + writel(reg, ep->epn.regs + AST_VHUB_EP_DESC_STATUS); + + /* Then turn it back on */ + writel(ep->epn.dma_conf, + ep->epn.regs + AST_VHUB_EP_DMA_CTLSTAT); + } else { + /* Single mode: just turn it back on */ + writel(ep->epn.dma_conf, + ep->epn.regs + AST_VHUB_EP_DMA_CTLSTAT); + } +} + +static int ast_vhub_epn_dequeue(struct usb_ep* u_ep, struct usb_request *u_req) +{ + struct ast_vhub_ep *ep = to_ast_ep(u_ep); + struct ast_vhub *vhub = ep->vhub; + struct ast_vhub_req *req; + unsigned long flags; + int rc = -EINVAL; + + spin_lock_irqsave(&vhub->lock, flags); + + /* Make sure it's actually queued on this endpoint */ + list_for_each_entry (req, &ep->queue, queue) { + if (&req->req == u_req) + break; + } + + if (&req->req == u_req) { + EPVDBG(ep, "dequeue req @%p active=%d\n", + req, req->active); + if (req->active) + ast_vhub_stop_active_req(ep, true); + ast_vhub_done(ep, req, -ECONNRESET); + rc = 0; + } + + spin_unlock_irqrestore(&vhub->lock, flags); + return rc; +} + +void ast_vhub_update_epn_stall(struct ast_vhub_ep *ep) +{ + u32 reg; + + if (WARN_ON(ep->d_idx == 0)) + return; + reg = readl(ep->epn.regs + AST_VHUB_EP_CONFIG); + if (ep->epn.stalled || ep->epn.wedged) + reg |= VHUB_EP_CFG_STALL_CTRL; + else + reg &= ~VHUB_EP_CFG_STALL_CTRL; + writel(reg, ep->epn.regs + AST_VHUB_EP_CONFIG); + + if (!ep->epn.stalled && !ep->epn.wedged) + writel(VHUB_EP_TOGGLE_SET_EPNUM(ep->epn.g_idx), + ep->vhub->regs + AST_VHUB_EP_TOGGLE); +} + +static int ast_vhub_set_halt_and_wedge(struct usb_ep* u_ep, bool halt, + bool wedge) +{ + struct ast_vhub_ep *ep = to_ast_ep(u_ep); + struct ast_vhub *vhub = ep->vhub; + unsigned long flags; + + EPDBG(ep, "Set halt (%d) & wedge (%d)\n", halt, wedge); + + if (!u_ep || !u_ep->desc) + return -EINVAL; + if (ep->d_idx == 0) + return 0; + if (ep->epn.is_iso) + return -EOPNOTSUPP; + + spin_lock_irqsave(&vhub->lock, flags); + + /* Fail with still-busy IN endpoints */ + if (halt && ep->epn.is_in && !list_empty(&ep->queue)) { + spin_unlock_irqrestore(&vhub->lock, flags); + return -EAGAIN; + } + ep->epn.stalled = halt; + ep->epn.wedged = wedge; + ast_vhub_update_epn_stall(ep); + + spin_unlock_irqrestore(&vhub->lock, flags); + + return 0; +} + +static int ast_vhub_epn_set_halt(struct usb_ep *u_ep, int value) +{ + return ast_vhub_set_halt_and_wedge(u_ep, value != 0, false); +} + +static int ast_vhub_epn_set_wedge(struct usb_ep *u_ep) +{ + return ast_vhub_set_halt_and_wedge(u_ep, true, true); +} + +static int ast_vhub_epn_disable(struct usb_ep* u_ep) +{ + struct ast_vhub_ep *ep = to_ast_ep(u_ep); + struct ast_vhub *vhub = ep->vhub; + unsigned long flags; + u32 imask, ep_ier; + + EPDBG(ep, "Disabling !\n"); + + spin_lock_irqsave(&vhub->lock, flags); + + ep->epn.enabled = false; + + /* Stop active DMA if any */ + ast_vhub_stop_active_req(ep, false); + + /* Disable endpoint */ + writel(0, ep->epn.regs + AST_VHUB_EP_CONFIG); + + /* Disable ACK interrupt */ + imask = VHUB_EP_IRQ(ep->epn.g_idx); + ep_ier = readl(vhub->regs + AST_VHUB_EP_ACK_IER); + ep_ier &= ~imask; + writel(ep_ier, vhub->regs + AST_VHUB_EP_ACK_IER); + writel(imask, vhub->regs + AST_VHUB_EP_ACK_ISR); + + /* Nuke all pending requests */ + ast_vhub_nuke(ep, -ESHUTDOWN); + + /* No more descriptor associated with request */ + ep->ep.desc = NULL; + + spin_unlock_irqrestore(&vhub->lock, flags); + + return 0; +} + +static int ast_vhub_epn_enable(struct usb_ep* u_ep, + const struct usb_endpoint_descriptor *desc) +{ + static const char *ep_type_string[] __maybe_unused = { "ctrl", + "isoc", + "bulk", + "intr" }; + struct ast_vhub_ep *ep = to_ast_ep(u_ep); + struct ast_vhub_dev *dev; + struct ast_vhub *vhub; + u16 maxpacket, type; + unsigned long flags; + u32 ep_conf, ep_ier, imask; + + /* Check arguments */ + if (!u_ep || !desc) + return -EINVAL; + + maxpacket = usb_endpoint_maxp(desc); + if (!ep->d_idx || !ep->dev || + desc->bDescriptorType != USB_DT_ENDPOINT || + maxpacket == 0 || maxpacket > ep->ep.maxpacket) { + EPDBG(ep, "Invalid EP enable,d_idx=%d,dev=%p,type=%d,mp=%d/%d\n", + ep->d_idx, ep->dev, desc->bDescriptorType, + maxpacket, ep->ep.maxpacket); + return -EINVAL; + } + if (ep->d_idx != usb_endpoint_num(desc)) { + EPDBG(ep, "EP number mismatch !\n"); + return -EINVAL; + } + + if (ep->epn.enabled) { + EPDBG(ep, "Already enabled\n"); + return -EBUSY; + } + dev = ep->dev; + vhub = ep->vhub; + + /* Check device state */ + if (!dev->driver) { + EPDBG(ep, "Bogus device state: driver=%p speed=%d\n", + dev->driver, dev->gadget.speed); + return -ESHUTDOWN; + } + + /* Grab some info from the descriptor */ + ep->epn.is_in = usb_endpoint_dir_in(desc); + ep->ep.maxpacket = maxpacket; + type = usb_endpoint_type(desc); + ep->epn.d_next = ep->epn.d_last = 0; + ep->epn.is_iso = false; + ep->epn.stalled = false; + ep->epn.wedged = false; + + EPDBG(ep, "Enabling [%s] %s num %d maxpacket=%d\n", + ep->epn.is_in ? "in" : "out", ep_type_string[type], + usb_endpoint_num(desc), maxpacket); + + /* Can we use DMA descriptor mode ? */ + ep->epn.desc_mode = ep->epn.descs && ep->epn.is_in; + if (ep->epn.desc_mode) + memset(ep->epn.descs, 0, 8 * AST_VHUB_DESCS_COUNT); + + /* + * Large send function can send up to 8 packets from + * one descriptor with a limit of 4095 bytes. + */ + ep->epn.chunk_max = ep->ep.maxpacket; + if (ep->epn.is_in) { + ep->epn.chunk_max <<= 3; + while (ep->epn.chunk_max > 4095) + ep->epn.chunk_max -= ep->ep.maxpacket; + } + + switch(type) { + case USB_ENDPOINT_XFER_CONTROL: + EPDBG(ep, "Only one control endpoint\n"); + return -EINVAL; + case USB_ENDPOINT_XFER_INT: + ep_conf = VHUB_EP_CFG_SET_TYPE(EP_TYPE_INT); + break; + case USB_ENDPOINT_XFER_BULK: + ep_conf = VHUB_EP_CFG_SET_TYPE(EP_TYPE_BULK); + break; + case USB_ENDPOINT_XFER_ISOC: + ep_conf = VHUB_EP_CFG_SET_TYPE(EP_TYPE_ISO); + ep->epn.is_iso = true; + break; + default: + return -EINVAL; + } + + /* Encode the rest of the EP config register */ + if (maxpacket < 1024) + ep_conf |= VHUB_EP_CFG_SET_MAX_PKT(maxpacket); + if (!ep->epn.is_in) + ep_conf |= VHUB_EP_CFG_DIR_OUT; + ep_conf |= VHUB_EP_CFG_SET_EP_NUM(usb_endpoint_num(desc)); + ep_conf |= VHUB_EP_CFG_ENABLE; + ep_conf |= VHUB_EP_CFG_SET_DEV(dev->index + 1); + EPVDBG(ep, "config=%08x\n", ep_conf); + + spin_lock_irqsave(&vhub->lock, flags); + + /* Disable HW and reset DMA */ + writel(0, ep->epn.regs + AST_VHUB_EP_CONFIG); + writel(VHUB_EP_DMA_CTRL_RESET, + ep->epn.regs + AST_VHUB_EP_DMA_CTLSTAT); + + /* Configure and enable */ + writel(ep_conf, ep->epn.regs + AST_VHUB_EP_CONFIG); + + if (ep->epn.desc_mode) { + /* Clear DMA status, including the DMA read ptr */ + writel(0, ep->epn.regs + AST_VHUB_EP_DESC_STATUS); + + /* Set descriptor base */ + writel(ep->epn.descs_dma, + ep->epn.regs + AST_VHUB_EP_DESC_BASE); + + /* Set base DMA config value */ + ep->epn.dma_conf = VHUB_EP_DMA_DESC_MODE; + if (ep->epn.is_in) + ep->epn.dma_conf |= VHUB_EP_DMA_IN_LONG_MODE; + + /* First reset and disable all operations */ + writel(ep->epn.dma_conf | VHUB_EP_DMA_CTRL_RESET, + ep->epn.regs + AST_VHUB_EP_DMA_CTLSTAT); + + /* Enable descriptor mode */ + writel(ep->epn.dma_conf, + ep->epn.regs + AST_VHUB_EP_DMA_CTLSTAT); + } else { + /* Set base DMA config value */ + ep->epn.dma_conf = VHUB_EP_DMA_SINGLE_STAGE; + + /* Reset and switch to single stage mode */ + writel(ep->epn.dma_conf | VHUB_EP_DMA_CTRL_RESET, + ep->epn.regs + AST_VHUB_EP_DMA_CTLSTAT); + writel(ep->epn.dma_conf, + ep->epn.regs + AST_VHUB_EP_DMA_CTLSTAT); + writel(0, ep->epn.regs + AST_VHUB_EP_DESC_STATUS); + } + + /* Cleanup data toggle just in case */ + writel(VHUB_EP_TOGGLE_SET_EPNUM(ep->epn.g_idx), + vhub->regs + AST_VHUB_EP_TOGGLE); + + /* Cleanup and enable ACK interrupt */ + imask = VHUB_EP_IRQ(ep->epn.g_idx); + writel(imask, vhub->regs + AST_VHUB_EP_ACK_ISR); + ep_ier = readl(vhub->regs + AST_VHUB_EP_ACK_IER); + ep_ier |= imask; + writel(ep_ier, vhub->regs + AST_VHUB_EP_ACK_IER); + + /* Woot, we are online ! */ + ep->epn.enabled = true; + + spin_unlock_irqrestore(&vhub->lock, flags); + + return 0; +} + +static void ast_vhub_epn_dispose(struct usb_ep *u_ep) +{ + struct ast_vhub_ep *ep = to_ast_ep(u_ep); + + if (WARN_ON(!ep->dev || !ep->d_idx)) + return; + + EPDBG(ep, "Releasing endpoint\n"); + + /* Take it out of the EP list */ + list_del_init(&ep->ep.ep_list); + + /* Mark the address free in the device */ + ep->dev->epns[ep->d_idx - 1] = NULL; + + /* Free name & DMA buffers */ + kfree(ep->ep.name); + ep->ep.name = NULL; + dma_free_coherent(&ep->vhub->pdev->dev, + AST_VHUB_EPn_MAX_PACKET + + 8 * AST_VHUB_DESCS_COUNT, + ep->buf, ep->buf_dma); + ep->buf = NULL; + ep->epn.descs = NULL; + + /* Mark free */ + ep->dev = NULL; +} + +static const struct usb_ep_ops ast_vhub_epn_ops = { + .enable = ast_vhub_epn_enable, + .disable = ast_vhub_epn_disable, + .dispose = ast_vhub_epn_dispose, + .queue = ast_vhub_epn_queue, + .dequeue = ast_vhub_epn_dequeue, + .set_halt = ast_vhub_epn_set_halt, + .set_wedge = ast_vhub_epn_set_wedge, + .alloc_request = ast_vhub_alloc_request, + .free_request = ast_vhub_free_request, +}; + +struct ast_vhub_ep *ast_vhub_alloc_epn(struct ast_vhub_dev *d, u8 addr) +{ + struct ast_vhub *vhub = d->vhub; + struct ast_vhub_ep *ep; + unsigned long flags; + int i; + + /* Find a free one (no device) */ + spin_lock_irqsave(&vhub->lock, flags); + for (i = 0; i < AST_VHUB_NUM_GEN_EPs; i++) + if (vhub->epns[i].dev == NULL) + break; + if (i >= AST_VHUB_NUM_GEN_EPs) { + spin_unlock_irqrestore(&vhub->lock, flags); + return NULL; + } + + /* Set it up */ + ep = &vhub->epns[i]; + ep->dev = d; + spin_unlock_irqrestore(&vhub->lock, flags); + + DDBG(d, "Allocating gen EP %d for addr %d\n", i, addr); + INIT_LIST_HEAD(&ep->queue); + ep->d_idx = addr; + ep->vhub = vhub; + ep->ep.ops = &ast_vhub_epn_ops; + ep->ep.name = kasprintf(GFP_KERNEL, "ep%d", addr); + d->epns[addr-1] = ep; + ep->epn.g_idx = i; + ep->epn.regs = vhub->regs + 0x200 + (i * 0x10); + + ep->buf = dma_alloc_coherent(&vhub->pdev->dev, + AST_VHUB_EPn_MAX_PACKET + + 8 * AST_VHUB_DESCS_COUNT, + &ep->buf_dma, GFP_KERNEL); + if (!ep->buf) { + kfree(ep->ep.name); + ep->ep.name = NULL; + return NULL; + } + ep->epn.descs = ep->buf + AST_VHUB_EPn_MAX_PACKET; + ep->epn.descs_dma = ep->buf_dma + AST_VHUB_EPn_MAX_PACKET; + + usb_ep_set_maxpacket_limit(&ep->ep, AST_VHUB_EPn_MAX_PACKET); + list_add_tail(&ep->ep.ep_list, &d->gadget.ep_list); + ep->ep.caps.type_iso = true; + ep->ep.caps.type_bulk = true; + ep->ep.caps.type_int = true; + ep->ep.caps.dir_in = true; + ep->ep.caps.dir_out = true; + + return ep; +} diff --git a/drivers/usb/gadget/udc/aspeed-vhub/hub.c b/drivers/usb/gadget/udc/aspeed-vhub/hub.c new file mode 100644 index 0000000..35ba0e5 --- /dev/null +++ b/drivers/usb/gadget/udc/aspeed-vhub/hub.c @@ -0,0 +1,829 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * aspeed-vhub -- Driver for Aspeed SoC "vHub" USB gadget + * + * hub.c - virtual hub handling + * + * Copyright 2017 IBM Corporation + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include "vhub.h" + +/* usb 2.0 hub device descriptor + * + * A few things we may want to improve here: + * + * - We may need to indicate TT support + * - We may need a device qualifier descriptor + * as devices can pretend to be usb1 or 2 + * - Make vid/did overridable + * - make it look like usb1 if usb1 mode forced + */ +#define KERNEL_REL bin2bcd(((LINUX_VERSION_CODE >> 16) & 0x0ff)) +#define KERNEL_VER bin2bcd(((LINUX_VERSION_CODE >> 8) & 0x0ff)) + +enum { + AST_VHUB_STR_MANUF = 3, + AST_VHUB_STR_PRODUCT = 2, + AST_VHUB_STR_SERIAL = 1, +}; + +static const struct usb_device_descriptor ast_vhub_dev_desc = { + .bLength = USB_DT_DEVICE_SIZE, + .bDescriptorType = USB_DT_DEVICE, + .bcdUSB = cpu_to_le16(0x0200), + .bDeviceClass = USB_CLASS_HUB, + .bDeviceSubClass = 0, + .bDeviceProtocol = 1, + .bMaxPacketSize0 = 64, + .idVendor = cpu_to_le16(0x1d6b), + .idProduct = cpu_to_le16(0x0107), + .bcdDevice = cpu_to_le16(0x0100), + .iManufacturer = AST_VHUB_STR_MANUF, + .iProduct = AST_VHUB_STR_PRODUCT, + .iSerialNumber = AST_VHUB_STR_SERIAL, + .bNumConfigurations = 1, +}; + +/* Patches to the above when forcing USB1 mode */ +static void ast_vhub_patch_dev_desc_usb1(struct usb_device_descriptor *desc) +{ + desc->bcdUSB = cpu_to_le16(0x0100); + desc->bDeviceProtocol = 0; +} + +/* + * Configuration descriptor: same comments as above + * regarding handling USB1 mode. + */ + +/* + * We don't use sizeof() as Linux definition of + * struct usb_endpoint_descriptor contains 2 + * extra bytes + */ +#define AST_VHUB_CONF_DESC_SIZE (USB_DT_CONFIG_SIZE + \ + USB_DT_INTERFACE_SIZE + \ + USB_DT_ENDPOINT_SIZE) + +static const struct ast_vhub_full_cdesc { + struct usb_config_descriptor cfg; + struct usb_interface_descriptor intf; + struct usb_endpoint_descriptor ep; +} __attribute__ ((packed)) ast_vhub_conf_desc = { + .cfg = { + .bLength = USB_DT_CONFIG_SIZE, + .bDescriptorType = USB_DT_CONFIG, + .wTotalLength = cpu_to_le16(AST_VHUB_CONF_DESC_SIZE), + .bNumInterfaces = 1, + .bConfigurationValue = 1, + .iConfiguration = 0, + .bmAttributes = USB_CONFIG_ATT_ONE | + USB_CONFIG_ATT_SELFPOWER | + USB_CONFIG_ATT_WAKEUP, + .bMaxPower = 0, + }, + .intf = { + .bLength = USB_DT_INTERFACE_SIZE, + .bDescriptorType = USB_DT_INTERFACE, + .bInterfaceNumber = 0, + .bAlternateSetting = 0, + .bNumEndpoints = 1, + .bInterfaceClass = USB_CLASS_HUB, + .bInterfaceSubClass = 0, + .bInterfaceProtocol = 0, + .iInterface = 0, + }, + .ep = { + .bLength = USB_DT_ENDPOINT_SIZE, + .bDescriptorType = USB_DT_ENDPOINT, + .bEndpointAddress = 0x81, + .bmAttributes = USB_ENDPOINT_XFER_INT, + .wMaxPacketSize = cpu_to_le16(1), + .bInterval = 0x0c, + }, +}; + +#define AST_VHUB_HUB_DESC_SIZE (USB_DT_HUB_NONVAR_SIZE + 2) + +static const struct usb_hub_descriptor ast_vhub_hub_desc = { + .bDescLength = AST_VHUB_HUB_DESC_SIZE, + .bDescriptorType = USB_DT_HUB, + .bNbrPorts = AST_VHUB_NUM_PORTS, + .wHubCharacteristics = cpu_to_le16(HUB_CHAR_NO_LPSM), + .bPwrOn2PwrGood = 10, + .bHubContrCurrent = 0, + .u.hs.DeviceRemovable[0] = 0, + .u.hs.DeviceRemovable[1] = 0xff, +}; + +/* + * These strings converted to UTF-16 must be smaller than + * our EP0 buffer. + */ +static const struct usb_string ast_vhub_str_array[] = { + { + .id = AST_VHUB_STR_SERIAL, + .s = "00000000" + }, + { + .id = AST_VHUB_STR_PRODUCT, + .s = "USB Virtual Hub" + }, + { + .id = AST_VHUB_STR_MANUF, + .s = "Aspeed" + }, + { } +}; + +static const struct usb_gadget_strings ast_vhub_strings = { + .language = 0x0409, + .strings = (struct usb_string *)ast_vhub_str_array +}; + +static int ast_vhub_hub_dev_status(struct ast_vhub_ep *ep, + u16 wIndex, u16 wValue) +{ + u8 st0; + + EPDBG(ep, "GET_STATUS(dev)\n"); + + /* + * Mark it as self-powered, I doubt the BMC is powered off + * the USB bus ... + */ + st0 = 1 << USB_DEVICE_SELF_POWERED; + + /* + * Need to double check how remote wakeup actually works + * on that chip and what triggers it. + */ + if (ep->vhub->wakeup_en) + st0 |= 1 << USB_DEVICE_REMOTE_WAKEUP; + + return ast_vhub_simple_reply(ep, st0, 0); +} + +static int ast_vhub_hub_ep_status(struct ast_vhub_ep *ep, + u16 wIndex, u16 wValue) +{ + int ep_num; + u8 st0 = 0; + + ep_num = wIndex & USB_ENDPOINT_NUMBER_MASK; + EPDBG(ep, "GET_STATUS(ep%d)\n", ep_num); + + /* On the hub we have only EP 0 and 1 */ + if (ep_num == 1) { + if (ep->vhub->ep1_stalled) + st0 |= 1 << USB_ENDPOINT_HALT; + } else if (ep_num != 0) + return std_req_stall; + + return ast_vhub_simple_reply(ep, st0, 0); +} + +static int ast_vhub_hub_dev_feature(struct ast_vhub_ep *ep, + u16 wIndex, u16 wValue, + bool is_set) +{ + EPDBG(ep, "%s_FEATURE(dev val=%02x)\n", + is_set ? "SET" : "CLEAR", wValue); + + if (wValue != USB_DEVICE_REMOTE_WAKEUP) + return std_req_stall; + + ep->vhub->wakeup_en = is_set; + EPDBG(ep, "Hub remote wakeup %s\n", + is_set ? "enabled" : "disabled"); + + return std_req_complete; +} + +static int ast_vhub_hub_ep_feature(struct ast_vhub_ep *ep, + u16 wIndex, u16 wValue, + bool is_set) +{ + int ep_num; + u32 reg; + + ep_num = wIndex & USB_ENDPOINT_NUMBER_MASK; + EPDBG(ep, "%s_FEATURE(ep%d val=%02x)\n", + is_set ? "SET" : "CLEAR", ep_num, wValue); + + if (ep_num > 1) + return std_req_stall; + if (wValue != USB_ENDPOINT_HALT) + return std_req_stall; + if (ep_num == 0) + return std_req_complete; + + EPDBG(ep, "%s stall on EP 1\n", + is_set ? "setting" : "clearing"); + + ep->vhub->ep1_stalled = is_set; + reg = readl(ep->vhub->regs + AST_VHUB_EP1_CTRL); + if (is_set) { + reg |= VHUB_EP1_CTRL_STALL; + } else { + reg &= ~VHUB_EP1_CTRL_STALL; + reg |= VHUB_EP1_CTRL_RESET_TOGGLE; + } + writel(reg, ep->vhub->regs + AST_VHUB_EP1_CTRL); + + return std_req_complete; +} + +static int ast_vhub_rep_desc(struct ast_vhub_ep *ep, + u8 desc_type, u16 len) +{ + size_t dsize; + + EPDBG(ep, "GET_DESCRIPTOR(type:%d)\n", desc_type); + + /* + * Copy first to EP buffer and send from there, so + * we can do some in-place patching if needed. We know + * the EP buffer is big enough but ensure that doesn't + * change. We do that now rather than later after we + * have checked sizes etc... to avoid a gcc bug where + * it thinks len is constant and barfs about read + * overflows in memcpy. + */ + switch(desc_type) { + case USB_DT_DEVICE: + dsize = USB_DT_DEVICE_SIZE; + memcpy(ep->buf, &ast_vhub_dev_desc, dsize); + BUILD_BUG_ON(dsize > sizeof(ast_vhub_dev_desc)); + BUILD_BUG_ON(USB_DT_DEVICE_SIZE >= AST_VHUB_EP0_MAX_PACKET); + break; + case USB_DT_CONFIG: + dsize = AST_VHUB_CONF_DESC_SIZE; + memcpy(ep->buf, &ast_vhub_conf_desc, dsize); + BUILD_BUG_ON(dsize > sizeof(ast_vhub_conf_desc)); + BUILD_BUG_ON(AST_VHUB_CONF_DESC_SIZE >= AST_VHUB_EP0_MAX_PACKET); + break; + case USB_DT_HUB: + dsize = AST_VHUB_HUB_DESC_SIZE; + memcpy(ep->buf, &ast_vhub_hub_desc, dsize); + BUILD_BUG_ON(dsize > sizeof(ast_vhub_hub_desc)); + BUILD_BUG_ON(AST_VHUB_HUB_DESC_SIZE >= AST_VHUB_EP0_MAX_PACKET); + break; + default: + return std_req_stall; + } + + /* Crop requested length */ + if (len > dsize) + len = dsize; + + /* Patch it if forcing USB1 */ + if (desc_type == USB_DT_DEVICE && ep->vhub->force_usb1) + ast_vhub_patch_dev_desc_usb1(ep->buf); + + /* Shoot it from the EP buffer */ + return ast_vhub_reply(ep, NULL, len); +} + +static int ast_vhub_rep_string(struct ast_vhub_ep *ep, + u8 string_id, u16 lang_id, + u16 len) +{ + int rc = usb_gadget_get_string (&ast_vhub_strings, string_id, ep->buf); + + /* + * This should never happen unless we put too big strings in + * the array above + */ + BUG_ON(rc >= AST_VHUB_EP0_MAX_PACKET); + + if (rc < 0) + return std_req_stall; + + /* Shoot it from the EP buffer */ + return ast_vhub_reply(ep, NULL, min_t(u16, rc, len)); +} + +enum std_req_rc ast_vhub_std_hub_request(struct ast_vhub_ep *ep, + struct usb_ctrlrequest *crq) +{ + struct ast_vhub *vhub = ep->vhub; + u16 wValue, wIndex, wLength; + + wValue = le16_to_cpu(crq->wValue); + wIndex = le16_to_cpu(crq->wIndex); + wLength = le16_to_cpu(crq->wLength); + + /* First packet, grab speed */ + if (vhub->speed == USB_SPEED_UNKNOWN) { + u32 ustat = readl(vhub->regs + AST_VHUB_USBSTS); + if (ustat & VHUB_USBSTS_HISPEED) + vhub->speed = USB_SPEED_HIGH; + else + vhub->speed = USB_SPEED_FULL; + UDCDBG(vhub, "USB status=%08x speed=%s\n", ustat, + vhub->speed == USB_SPEED_HIGH ? "high" : "full"); + } + + switch ((crq->bRequestType << 8) | crq->bRequest) { + /* SET_ADDRESS */ + case DeviceOutRequest | USB_REQ_SET_ADDRESS: + EPDBG(ep, "SET_ADDRESS: Got address %x\n", wValue); + writel(wValue, vhub->regs + AST_VHUB_CONF); + return std_req_complete; + + /* GET_STATUS */ + case DeviceRequest | USB_REQ_GET_STATUS: + return ast_vhub_hub_dev_status(ep, wIndex, wValue); + case InterfaceRequest | USB_REQ_GET_STATUS: + return ast_vhub_simple_reply(ep, 0, 0); + case EndpointRequest | USB_REQ_GET_STATUS: + return ast_vhub_hub_ep_status(ep, wIndex, wValue); + + /* SET/CLEAR_FEATURE */ + case DeviceOutRequest | USB_REQ_SET_FEATURE: + return ast_vhub_hub_dev_feature(ep, wIndex, wValue, true); + case DeviceOutRequest | USB_REQ_CLEAR_FEATURE: + return ast_vhub_hub_dev_feature(ep, wIndex, wValue, false); + case EndpointOutRequest | USB_REQ_SET_FEATURE: + return ast_vhub_hub_ep_feature(ep, wIndex, wValue, true); + case EndpointOutRequest | USB_REQ_CLEAR_FEATURE: + return ast_vhub_hub_ep_feature(ep, wIndex, wValue, false); + + /* GET/SET_CONFIGURATION */ + case DeviceRequest | USB_REQ_GET_CONFIGURATION: + return ast_vhub_simple_reply(ep, 1); + case DeviceOutRequest | USB_REQ_SET_CONFIGURATION: + if (wValue != 1) + return std_req_stall; + return std_req_complete; + + /* GET_DESCRIPTOR */ + case DeviceRequest | USB_REQ_GET_DESCRIPTOR: + switch (wValue >> 8) { + case USB_DT_DEVICE: + case USB_DT_CONFIG: + return ast_vhub_rep_desc(ep, wValue >> 8, + wLength); + case USB_DT_STRING: + return ast_vhub_rep_string(ep, wValue & 0xff, + wIndex, wLength); + } + return std_req_stall; + + /* GET/SET_INTERFACE */ + case DeviceRequest | USB_REQ_GET_INTERFACE: + return ast_vhub_simple_reply(ep, 0); + case DeviceOutRequest | USB_REQ_SET_INTERFACE: + if (wValue != 0 || wIndex != 0) + return std_req_stall; + return std_req_complete; + } + return std_req_stall; +} + +static void ast_vhub_update_hub_ep1(struct ast_vhub *vhub, + unsigned int port) +{ + /* Update HW EP1 response */ + u32 reg = readl(vhub->regs + AST_VHUB_EP1_STS_CHG); + u32 pmask = (1 << (port + 1)); + if (vhub->ports[port].change) + reg |= pmask; + else + reg &= ~pmask; + writel(reg, vhub->regs + AST_VHUB_EP1_STS_CHG); +} + +static void ast_vhub_change_port_stat(struct ast_vhub *vhub, + unsigned int port, + u16 clr_flags, + u16 set_flags, + bool set_c) +{ + struct ast_vhub_port *p = &vhub->ports[port]; + u16 prev; + + /* Update port status */ + prev = p->status; + p->status = (prev & ~clr_flags) | set_flags; + DDBG(&p->dev, "port %d status %04x -> %04x (C=%d)\n", + port + 1, prev, p->status, set_c); + + /* Update change bits if needed */ + if (set_c) { + u16 chg = p->status ^ prev; + + /* Only these are relevant for change */ + chg &= USB_PORT_STAT_C_CONNECTION | + USB_PORT_STAT_C_ENABLE | + USB_PORT_STAT_C_SUSPEND | + USB_PORT_STAT_C_OVERCURRENT | + USB_PORT_STAT_C_RESET | + USB_PORT_STAT_C_L1; + p->change |= chg; + + ast_vhub_update_hub_ep1(vhub, port); + } +} + +static void ast_vhub_send_host_wakeup(struct ast_vhub *vhub) +{ + u32 reg = readl(vhub->regs + AST_VHUB_CTRL); + UDCDBG(vhub, "Waking up host !\n"); + reg |= VHUB_CTRL_MANUAL_REMOTE_WAKEUP; + writel(reg, vhub->regs + AST_VHUB_CTRL); +} + +void ast_vhub_device_connect(struct ast_vhub *vhub, + unsigned int port, bool on) +{ + if (on) + ast_vhub_change_port_stat(vhub, port, 0, + USB_PORT_STAT_CONNECTION, true); + else + ast_vhub_change_port_stat(vhub, port, + USB_PORT_STAT_CONNECTION | + USB_PORT_STAT_ENABLE, + 0, true); + + /* + * If the hub is set to wakup the host on connection events + * then send a wakeup. + */ + if (vhub->wakeup_en) + ast_vhub_send_host_wakeup(vhub); +} + +static void ast_vhub_wake_work(struct work_struct *work) +{ + struct ast_vhub *vhub = container_of(work, + struct ast_vhub, + wake_work); + unsigned long flags; + unsigned int i; + + /* + * Wake all sleeping ports. If a port is suspended by + * the host suspend (without explicit state suspend), + * we let the normal host wake path deal with it later. + */ + spin_lock_irqsave(&vhub->lock, flags); + for (i = 0; i < AST_VHUB_NUM_PORTS; i++) { + struct ast_vhub_port *p = &vhub->ports[i]; + + if (!(p->status & USB_PORT_STAT_SUSPEND)) + continue; + ast_vhub_change_port_stat(vhub, i, + USB_PORT_STAT_SUSPEND, + 0, true); + ast_vhub_dev_resume(&p->dev); + } + ast_vhub_send_host_wakeup(vhub); + spin_unlock_irqrestore(&vhub->lock, flags); +} + +void ast_vhub_hub_wake_all(struct ast_vhub *vhub) +{ + /* + * A device is trying to wake the world, because this + * can recurse into the device, we break the call chain + * using a work queue + */ + schedule_work(&vhub->wake_work); +} + +static void ast_vhub_port_reset(struct ast_vhub *vhub, u8 port) +{ + struct ast_vhub_port *p = &vhub->ports[port]; + u16 set, clr, speed; + + /* First mark disabled */ + ast_vhub_change_port_stat(vhub, port, + USB_PORT_STAT_ENABLE | + USB_PORT_STAT_SUSPEND, + USB_PORT_STAT_RESET, + false); + + if (!p->dev.driver) + return; + + /* + * This will either "start" the port or reset the + * device if already started... + */ + ast_vhub_dev_reset(&p->dev); + + /* Grab the right speed */ + speed = p->dev.driver->max_speed; + if (speed == USB_SPEED_UNKNOWN || speed > vhub->speed) + speed = vhub->speed; + + switch (speed) { + case USB_SPEED_LOW: + set = USB_PORT_STAT_LOW_SPEED; + clr = USB_PORT_STAT_HIGH_SPEED; + break; + case USB_SPEED_FULL: + set = 0; + clr = USB_PORT_STAT_LOW_SPEED | + USB_PORT_STAT_HIGH_SPEED; + break; + case USB_SPEED_HIGH: + set = USB_PORT_STAT_HIGH_SPEED; + clr = USB_PORT_STAT_LOW_SPEED; + break; + default: + UDCDBG(vhub, "Unsupported speed %d when" + " connecting device\n", + speed); + return; + } + clr |= USB_PORT_STAT_RESET; + set |= USB_PORT_STAT_ENABLE; + + /* This should ideally be delayed ... */ + ast_vhub_change_port_stat(vhub, port, clr, set, true); +} + +static enum std_req_rc ast_vhub_set_port_feature(struct ast_vhub_ep *ep, + u8 port, u16 feat) +{ + struct ast_vhub *vhub = ep->vhub; + struct ast_vhub_port *p; + + if (port == 0 || port > AST_VHUB_NUM_PORTS) + return std_req_stall; + port--; + p = &vhub->ports[port]; + + switch(feat) { + case USB_PORT_FEAT_SUSPEND: + if (!(p->status & USB_PORT_STAT_ENABLE)) + return std_req_complete; + ast_vhub_change_port_stat(vhub, port, + 0, USB_PORT_STAT_SUSPEND, + false); + ast_vhub_dev_suspend(&p->dev); + return std_req_complete; + case USB_PORT_FEAT_RESET: + EPDBG(ep, "Port reset !\n"); + ast_vhub_port_reset(vhub, port); + return std_req_complete; + case USB_PORT_FEAT_POWER: + /* + * On Power-on, we mark the connected flag changed, + * if there's a connected device, some hosts will + * otherwise fail to detect it. + */ + if (p->status & USB_PORT_STAT_CONNECTION) { + p->change |= USB_PORT_STAT_C_CONNECTION; + ast_vhub_update_hub_ep1(vhub, port); + } + return std_req_complete; + case USB_PORT_FEAT_TEST: + case USB_PORT_FEAT_INDICATOR: + /* We don't do anything with these */ + return std_req_complete; + } + return std_req_stall; +} + +static enum std_req_rc ast_vhub_clr_port_feature(struct ast_vhub_ep *ep, + u8 port, u16 feat) +{ + struct ast_vhub *vhub = ep->vhub; + struct ast_vhub_port *p; + + if (port == 0 || port > AST_VHUB_NUM_PORTS) + return std_req_stall; + port--; + p = &vhub->ports[port]; + + switch(feat) { + case USB_PORT_FEAT_ENABLE: + ast_vhub_change_port_stat(vhub, port, + USB_PORT_STAT_ENABLE | + USB_PORT_STAT_SUSPEND, 0, + false); + ast_vhub_dev_suspend(&p->dev); + return std_req_complete; + case USB_PORT_FEAT_SUSPEND: + if (!(p->status & USB_PORT_STAT_SUSPEND)) + return std_req_complete; + ast_vhub_change_port_stat(vhub, port, + USB_PORT_STAT_SUSPEND, 0, + false); + ast_vhub_dev_resume(&p->dev); + return std_req_complete; + case USB_PORT_FEAT_POWER: + /* We don't do power control */ + return std_req_complete; + case USB_PORT_FEAT_INDICATOR: + /* We don't have indicators */ + return std_req_complete; + case USB_PORT_FEAT_C_CONNECTION: + case USB_PORT_FEAT_C_ENABLE: + case USB_PORT_FEAT_C_SUSPEND: + case USB_PORT_FEAT_C_OVER_CURRENT: + case USB_PORT_FEAT_C_RESET: + /* Clear state-change feature */ + p->change &= ~(1u << (feat - 16)); + ast_vhub_update_hub_ep1(vhub, port); + return std_req_complete; + } + return std_req_stall; +} + +static enum std_req_rc ast_vhub_get_port_stat(struct ast_vhub_ep *ep, + u8 port) +{ + struct ast_vhub *vhub = ep->vhub; + u16 stat, chg; + + if (port == 0 || port > AST_VHUB_NUM_PORTS) + return std_req_stall; + port--; + + stat = vhub->ports[port].status; + chg = vhub->ports[port].change; + + /* We always have power */ + stat |= USB_PORT_STAT_POWER; + + EPDBG(ep, " port status=%04x change=%04x\n", stat, chg); + + return ast_vhub_simple_reply(ep, + stat & 0xff, + stat >> 8, + chg & 0xff, + chg >> 8); +} + +enum std_req_rc ast_vhub_class_hub_request(struct ast_vhub_ep *ep, + struct usb_ctrlrequest *crq) +{ + u16 wValue, wIndex, wLength; + + wValue = le16_to_cpu(crq->wValue); + wIndex = le16_to_cpu(crq->wIndex); + wLength = le16_to_cpu(crq->wLength); + + switch ((crq->bRequestType << 8) | crq->bRequest) { + case GetHubStatus: + EPDBG(ep, "GetHubStatus\n"); + return ast_vhub_simple_reply(ep, 0, 0, 0, 0); + case GetPortStatus: + EPDBG(ep, "GetPortStatus(%d)\n", wIndex & 0xff); + return ast_vhub_get_port_stat(ep, wIndex & 0xf); + case GetHubDescriptor: + if (wValue != (USB_DT_HUB << 8)) + return std_req_stall; + EPDBG(ep, "GetHubDescriptor(%d)\n", wIndex & 0xff); + return ast_vhub_rep_desc(ep, USB_DT_HUB, wLength); + case SetHubFeature: + case ClearHubFeature: + EPDBG(ep, "Get/SetHubFeature(%d)\n", wValue); + /* No feature, just complete the requests */ + if (wValue == C_HUB_LOCAL_POWER || + wValue == C_HUB_OVER_CURRENT) + return std_req_complete; + return std_req_stall; + case SetPortFeature: + EPDBG(ep, "SetPortFeature(%d,%d)\n", wIndex & 0xf, wValue); + return ast_vhub_set_port_feature(ep, wIndex & 0xf, wValue); + case ClearPortFeature: + EPDBG(ep, "ClearPortFeature(%d,%d)\n", wIndex & 0xf, wValue); + return ast_vhub_clr_port_feature(ep, wIndex & 0xf, wValue); + default: + EPDBG(ep, "Unknown class request\n"); + } + return std_req_stall; +} + +void ast_vhub_hub_suspend(struct ast_vhub *vhub) +{ + unsigned int i; + + UDCDBG(vhub, "USB bus suspend\n"); + + if (vhub->suspended) + return; + + vhub->suspended = true; + + /* + * Forward to unsuspended ports without changing + * their connection status. + */ + for (i = 0; i < AST_VHUB_NUM_PORTS; i++) { + struct ast_vhub_port *p = &vhub->ports[i]; + + if (!(p->status & USB_PORT_STAT_SUSPEND)) + ast_vhub_dev_suspend(&p->dev); + } +} + +void ast_vhub_hub_resume(struct ast_vhub *vhub) +{ + unsigned int i; + + UDCDBG(vhub, "USB bus resume\n"); + + if (!vhub->suspended) + return; + + vhub->suspended = false; + + /* + * Forward to unsuspended ports without changing + * their connection status. + */ + for (i = 0; i < AST_VHUB_NUM_PORTS; i++) { + struct ast_vhub_port *p = &vhub->ports[i]; + + if (!(p->status & USB_PORT_STAT_SUSPEND)) + ast_vhub_dev_resume(&p->dev); + } +} + +void ast_vhub_hub_reset(struct ast_vhub *vhub) +{ + unsigned int i; + + UDCDBG(vhub, "USB bus reset\n"); + + /* + * Is the speed known ? If not we don't care, we aren't + * initialized yet and ports haven't been enabled. + */ + if (vhub->speed == USB_SPEED_UNKNOWN) + return; + + /* We aren't suspended anymore obviously */ + vhub->suspended = false; + + /* No speed set */ + vhub->speed = USB_SPEED_UNKNOWN; + + /* Wakeup not enabled anymore */ + vhub->wakeup_en = false; + + /* + * Clear all port status, disable gadgets and "suspend" + * them. They will be woken up by a port reset. + */ + for (i = 0; i < AST_VHUB_NUM_PORTS; i++) { + struct ast_vhub_port *p = &vhub->ports[i]; + + /* Only keep the connected flag */ + p->status &= USB_PORT_STAT_CONNECTION; + p->change = 0; + + /* Suspend the gadget if any */ + ast_vhub_dev_suspend(&p->dev); + } + + /* Cleanup HW */ + writel(0, vhub->regs + AST_VHUB_CONF); + writel(0, vhub->regs + AST_VHUB_EP0_CTRL); + writel(VHUB_EP1_CTRL_RESET_TOGGLE | + VHUB_EP1_CTRL_ENABLE, + vhub->regs + AST_VHUB_EP1_CTRL); + writel(0, vhub->regs + AST_VHUB_EP1_STS_CHG); +} + +void ast_vhub_init_hub(struct ast_vhub *vhub) +{ + vhub->speed = USB_SPEED_UNKNOWN; + INIT_WORK(&vhub->wake_work, ast_vhub_wake_work); +} + diff --git a/drivers/usb/gadget/udc/aspeed-vhub/vhub.h b/drivers/usb/gadget/udc/aspeed-vhub/vhub.h new file mode 100644 index 0000000..2b04025 --- /dev/null +++ b/drivers/usb/gadget/udc/aspeed-vhub/vhub.h @@ -0,0 +1,514 @@ +/* SPDX-License-Identifier: GPL-2.0+ */ +#ifndef __ASPEED_VHUB_H +#define __ASPEED_VHUB_H + +/***************************** + * * + * VHUB register definitions * + * * + *****************************/ + +#define AST_VHUB_CTRL 0x00 /* Root Function Control & Status Register */ +#define AST_VHUB_CONF 0x04 /* Root Configuration Setting Register */ +#define AST_VHUB_IER 0x08 /* Interrupt Ctrl Register */ +#define AST_VHUB_ISR 0x0C /* Interrupt Status Register */ +#define AST_VHUB_EP_ACK_IER 0x10 /* Programmable Endpoint Pool ACK Interrupt Enable Register */ +#define AST_VHUB_EP_NACK_IER 0x14 /* Programmable Endpoint Pool NACK Interrupt Enable Register */ +#define AST_VHUB_EP_ACK_ISR 0x18 /* Programmable Endpoint Pool ACK Interrupt Status Register */ +#define AST_VHUB_EP_NACK_ISR 0x1C /* Programmable Endpoint Pool NACK Interrupt Status Register */ +#define AST_VHUB_SW_RESET 0x20 /* Device Controller Soft Reset Enable Register */ +#define AST_VHUB_USBSTS 0x24 /* USB Status Register */ +#define AST_VHUB_EP_TOGGLE 0x28 /* Programmable Endpoint Pool Data Toggle Value Set */ +#define AST_VHUB_ISO_FAIL_ACC 0x2C /* Isochronous Transaction Fail Accumulator */ +#define AST_VHUB_EP0_CTRL 0x30 /* Endpoint 0 Contrl/Status Register */ +#define AST_VHUB_EP0_DATA 0x34 /* Base Address of Endpoint 0 In/OUT Data Buffer Register */ +#define AST_VHUB_EP1_CTRL 0x38 /* Endpoint 1 Contrl/Status Register */ +#define AST_VHUB_EP1_STS_CHG 0x3C /* Endpoint 1 Status Change Bitmap Data */ +#define AST_VHUB_SETUP0 0x80 /* Root Device Setup Data Buffer0 */ +#define AST_VHUB_SETUP1 0x84 /* Root Device Setup Data Buffer1 */ + +/* Main control reg */ +#define VHUB_CTRL_PHY_CLK (1 << 31) +#define VHUB_CTRL_PHY_LOOP_TEST (1 << 25) +#define VHUB_CTRL_DN_PWN (1 << 24) +#define VHUB_CTRL_DP_PWN (1 << 23) +#define VHUB_CTRL_LONG_DESC (1 << 18) +#define VHUB_CTRL_ISO_RSP_CTRL (1 << 17) +#define VHUB_CTRL_SPLIT_IN (1 << 16) +#define VHUB_CTRL_LOOP_T_RESULT (1 << 15) +#define VHUB_CTRL_LOOP_T_STS (1 << 14) +#define VHUB_CTRL_PHY_BIST_RESULT (1 << 13) +#define VHUB_CTRL_PHY_BIST_CTRL (1 << 12) +#define VHUB_CTRL_PHY_RESET_DIS (1 << 11) +#define VHUB_CTRL_SET_TEST_MODE(x) ((x) << 8) +#define VHUB_CTRL_MANUAL_REMOTE_WAKEUP (1 << 4) +#define VHUB_CTRL_AUTO_REMOTE_WAKEUP (1 << 3) +#define VHUB_CTRL_CLK_STOP_SUSPEND (1 << 2) +#define VHUB_CTRL_FULL_SPEED_ONLY (1 << 1) +#define VHUB_CTRL_UPSTREAM_CONNECT (1 << 0) + +/* IER & ISR */ +#define VHUB_IRQ_USB_CMD_DEADLOCK (1 << 18) +#define VHUB_IRQ_EP_POOL_NAK (1 << 17) +#define VHUB_IRQ_EP_POOL_ACK_STALL (1 << 16) +#define VHUB_IRQ_DEVICE5 (1 << 13) +#define VHUB_IRQ_DEVICE4 (1 << 12) +#define VHUB_IRQ_DEVICE3 (1 << 11) +#define VHUB_IRQ_DEVICE2 (1 << 10) +#define VHUB_IRQ_DEVICE1 (1 << 9) +#define VHUB_IRQ_BUS_RESUME (1 << 8) +#define VHUB_IRQ_BUS_SUSPEND (1 << 7) +#define VHUB_IRQ_BUS_RESET (1 << 6) +#define VHUB_IRQ_HUB_EP1_IN_DATA_ACK (1 << 5) +#define VHUB_IRQ_HUB_EP0_IN_DATA_NAK (1 << 4) +#define VHUB_IRQ_HUB_EP0_IN_ACK_STALL (1 << 3) +#define VHUB_IRQ_HUB_EP0_OUT_NAK (1 << 2) +#define VHUB_IRQ_HUB_EP0_OUT_ACK_STALL (1 << 1) +#define VHUB_IRQ_HUB_EP0_SETUP (1 << 0) +#define VHUB_IRQ_ACK_ALL 0x1ff + +/* SW reset reg */ +#define VHUB_SW_RESET_EP_POOL (1 << 9) +#define VHUB_SW_RESET_DMA_CONTROLLER (1 << 8) +#define VHUB_SW_RESET_DEVICE5 (1 << 5) +#define VHUB_SW_RESET_DEVICE4 (1 << 4) +#define VHUB_SW_RESET_DEVICE3 (1 << 3) +#define VHUB_SW_RESET_DEVICE2 (1 << 2) +#define VHUB_SW_RESET_DEVICE1 (1 << 1) +#define VHUB_SW_RESET_ROOT_HUB (1 << 0) +#define VHUB_SW_RESET_ALL (VHUB_SW_RESET_EP_POOL | \ + VHUB_SW_RESET_DMA_CONTROLLER | \ + VHUB_SW_RESET_DEVICE5 | \ + VHUB_SW_RESET_DEVICE4 | \ + VHUB_SW_RESET_DEVICE3 | \ + VHUB_SW_RESET_DEVICE2 | \ + VHUB_SW_RESET_DEVICE1 | \ + VHUB_SW_RESET_ROOT_HUB) +/* EP ACK/NACK IRQ masks */ +#define VHUB_EP_IRQ(n) (1 << (n)) +#define VHUB_EP_IRQ_ALL 0x7fff /* 15 EPs */ + +/* USB status reg */ +#define VHUB_USBSTS_HISPEED (1 << 27) + +/* EP toggle */ +#define VHUB_EP_TOGGLE_VALUE (1 << 8) +#define VHUB_EP_TOGGLE_SET_EPNUM(x) ((x) & 0x1f) + +/* HUB EP0 control */ +#define VHUB_EP0_CTRL_STALL (1 << 0) +#define VHUB_EP0_TX_BUFF_RDY (1 << 1) +#define VHUB_EP0_RX_BUFF_RDY (1 << 2) +#define VHUB_EP0_RX_LEN(x) (((x) >> 16) & 0x7f) +#define VHUB_EP0_SET_TX_LEN(x) (((x) & 0x7f) << 8) + +/* HUB EP1 control */ +#define VHUB_EP1_CTRL_RESET_TOGGLE (1 << 2) +#define VHUB_EP1_CTRL_STALL (1 << 1) +#define VHUB_EP1_CTRL_ENABLE (1 << 0) + +/*********************************** + * * + * per-device register definitions * + * * + ***********************************/ +#define AST_VHUB_DEV_EN_CTRL 0x00 +#define AST_VHUB_DEV_ISR 0x04 +#define AST_VHUB_DEV_EP0_CTRL 0x08 +#define AST_VHUB_DEV_EP0_DATA 0x0c + +/* Device enable control */ +#define VHUB_DEV_EN_SET_ADDR(x) ((x) << 8) +#define VHUB_DEV_EN_ADDR_MASK ((0xff) << 8) +#define VHUB_DEV_EN_EP0_NAK_IRQEN (1 << 6) +#define VHUB_DEV_EN_EP0_IN_ACK_IRQEN (1 << 5) +#define VHUB_DEV_EN_EP0_OUT_NAK_IRQEN (1 << 4) +#define VHUB_DEV_EN_EP0_OUT_ACK_IRQEN (1 << 3) +#define VHUB_DEV_EN_EP0_SETUP_IRQEN (1 << 2) +#define VHUB_DEV_EN_SPEED_SEL_HIGH (1 << 1) +#define VHUB_DEV_EN_ENABLE_PORT (1 << 0) + +/* Interrupt status */ +#define VHUV_DEV_IRQ_EP0_IN_DATA_NACK (1 << 4) +#define VHUV_DEV_IRQ_EP0_IN_ACK_STALL (1 << 3) +#define VHUV_DEV_IRQ_EP0_OUT_DATA_NACK (1 << 2) +#define VHUV_DEV_IRQ_EP0_OUT_ACK_STALL (1 << 1) +#define VHUV_DEV_IRQ_EP0_SETUP (1 << 0) + +/* Control bits. + * + * Note: The driver relies on the bulk of those bits + * matching corresponding vHub EP0 control bits + */ +#define VHUB_DEV_EP0_CTRL_STALL VHUB_EP0_CTRL_STALL +#define VHUB_DEV_EP0_TX_BUFF_RDY VHUB_EP0_TX_BUFF_RDY +#define VHUB_DEV_EP0_RX_BUFF_RDY VHUB_EP0_RX_BUFF_RDY +#define VHUB_DEV_EP0_RX_LEN(x) VHUB_EP0_RX_LEN(x) +#define VHUB_DEV_EP0_SET_TX_LEN(x) VHUB_EP0_SET_TX_LEN(x) + +/************************************* + * * + * per-endpoint register definitions * + * * + *************************************/ + +#define AST_VHUB_EP_CONFIG 0x00 +#define AST_VHUB_EP_DMA_CTLSTAT 0x04 +#define AST_VHUB_EP_DESC_BASE 0x08 +#define AST_VHUB_EP_DESC_STATUS 0x0C + +/* EP config reg */ +#define VHUB_EP_CFG_SET_MAX_PKT(x) (((x) & 0x3ff) << 16) +#define VHUB_EP_CFG_AUTO_DATA_DISABLE (1 << 13) +#define VHUB_EP_CFG_STALL_CTRL (1 << 12) +#define VHUB_EP_CFG_SET_EP_NUM(x) (((x) & 0xf) << 8) +#define VHUB_EP_CFG_SET_TYPE(x) ((x) << 5) +#define EP_TYPE_OFF 0 +#define EP_TYPE_BULK 1 +#define EP_TYPE_INT 2 +#define EP_TYPE_ISO 3 +#define VHUB_EP_CFG_DIR_OUT (1 << 4) +#define VHUB_EP_CFG_SET_DEV(x) ((x) << 1) +#define VHUB_EP_CFG_ENABLE (1 << 0) + +/* EP DMA control */ +#define VHUB_EP_DMA_PROC_STATUS(x) (((x) >> 4) & 0xf) +#define EP_DMA_PROC_RX_IDLE 0 +#define EP_DMA_PROC_TX_IDLE 8 +#define VHUB_EP_DMA_IN_LONG_MODE (1 << 3) +#define VHUB_EP_DMA_OUT_CONTIG_MODE (1 << 3) +#define VHUB_EP_DMA_CTRL_RESET (1 << 2) +#define VHUB_EP_DMA_SINGLE_STAGE (1 << 1) +#define VHUB_EP_DMA_DESC_MODE (1 << 0) + +/* EP DMA status */ +#define VHUB_EP_DMA_SET_TX_SIZE(x) ((x) << 16) +#define VHUB_EP_DMA_TX_SIZE(x) (((x) >> 16) & 0x7ff) +#define VHUB_EP_DMA_RPTR(x) (((x) >> 8) & 0xff) +#define VHUB_EP_DMA_SET_RPTR(x) (((x) & 0xff) << 8) +#define VHUB_EP_DMA_SET_CPU_WPTR(x) (x) +#define VHUB_EP_DMA_SINGLE_KICK (1 << 0) /* WPTR = 1 for single mode */ + +/******************************* + * * + * DMA descriptors definitions * + * * + *******************************/ + +/* Desc W1 IN */ +#define VHUB_DSC1_IN_INTERRUPT (1 << 31) +#define VHUB_DSC1_IN_SPID_DATA0 (0 << 14) +#define VHUB_DSC1_IN_SPID_DATA2 (1 << 14) +#define VHUB_DSC1_IN_SPID_DATA1 (2 << 14) +#define VHUB_DSC1_IN_SPID_MDATA (3 << 14) +#define VHUB_DSC1_IN_SET_LEN(x) ((x) & 0xfff) +#define VHUB_DSC1_IN_LEN(x) ((x) & 0xfff) + +/**************************************** + * * + * Data structures and misc definitions * + * * + ****************************************/ + +#define AST_VHUB_NUM_GEN_EPs 15 /* Generic non-0 EPs */ +#define AST_VHUB_NUM_PORTS 5 /* vHub ports */ +#define AST_VHUB_EP0_MAX_PACKET 64 /* EP0's max packet size */ +#define AST_VHUB_EPn_MAX_PACKET 1024 /* Generic EPs max packet size */ +#define AST_VHUB_DESCS_COUNT 256 /* Use 256 descriptor mode (valid + * values are 256 and 32) + */ + +struct ast_vhub; +struct ast_vhub_dev; + +/* + * DMA descriptor (generic EPs only, currently only used + * for IN endpoints + */ +struct ast_vhub_desc { + __le32 w0; + __le32 w1; +}; + +/* A transfer request, either core-originated or internal */ +struct ast_vhub_req { + struct usb_request req; + struct list_head queue; + + /* Actual count written to descriptors (desc mode only) */ + unsigned int act_count; + + /* + * Desc number of the final packet or -1. For non-desc + * mode (or ep0), any >= 0 value means "last packet" + */ + int last_desc; + + /* Request active (pending DMAs) */ + bool active : 1; + + /* Internal request (don't call back core) */ + bool internal : 1; +}; +#define to_ast_req(__ureq) container_of(__ureq, struct ast_vhub_req, req) + +/* Current state of an EP0 */ +enum ep0_state { + ep0_state_token, + ep0_state_data, + ep0_state_status, +}; + +/* + * An endpoint, either generic, ep0, actual gadget EP + * or internal use vhub EP0. vhub EP1 doesn't have an + * associated structure as it's mostly HW managed. + */ +struct ast_vhub_ep { + struct usb_ep ep; + + /* Request queue */ + struct list_head queue; + + /* EP index in the device, 0 means this is an EP0 */ + unsigned int d_idx; + + /* Dev pointer or NULL for vHub EP0 */ + struct ast_vhub_dev *dev; + + /* vHub itself */ + struct ast_vhub *vhub; + + /* + * DMA buffer for EP0, fallback DMA buffer for misaligned + * OUT transfers for generic EPs + */ + void *buf; + dma_addr_t buf_dma; + + /* The rest depends on the EP type */ + union { + /* EP0 (either device or vhub) */ + struct { + /* + * EP0 registers are "similar" for + * vHub and devices but located in + * different places. + */ + void __iomem *ctlstat; + void __iomem *setup; + + /* Current state & direction */ + enum ep0_state state; + bool dir_in; + + /* Internal use request */ + struct ast_vhub_req req; + } ep0; + + /* Generic endpoint (aka EPn) */ + struct { + /* Registers */ + void __iomem *regs; + + /* Index in global pool (0..14) */ + unsigned int g_idx; + + /* DMA Descriptors */ + struct ast_vhub_desc *descs; + dma_addr_t descs_dma; + unsigned int d_next; + unsigned int d_last; + unsigned int dma_conf; + + /* Max chunk size for IN EPs */ + unsigned int chunk_max; + + /* State flags */ + bool is_in : 1; + bool is_iso : 1; + bool stalled : 1; + bool wedged : 1; + bool enabled : 1; + bool desc_mode : 1; + } epn; + }; +}; +#define to_ast_ep(__uep) container_of(__uep, struct ast_vhub_ep, ep) + +/* A device attached to a vHub port */ +struct ast_vhub_dev { + struct ast_vhub *vhub; + void __iomem *regs; + + /* Device index (0...4) and name string */ + unsigned int index; + const char *name; + + /* sysfs enclosure for the gadget gunk */ + struct device *port_dev; + + /* Link to gadget core */ + struct usb_gadget gadget; + struct usb_gadget_driver *driver; + bool registered : 1; + bool wakeup_en : 1; + bool suspended : 1; + bool enabled : 1; + + /* Endpoint structures */ + struct ast_vhub_ep ep0; + struct ast_vhub_ep *epns[AST_VHUB_NUM_GEN_EPs]; + +}; +#define to_ast_dev(__g) container_of(__g, struct ast_vhub_dev, gadget) + +/* Per vhub port stateinfo structure */ +struct ast_vhub_port { + /* Port status & status change registers */ + u16 status; + u16 change; + + /* Associated device slot */ + struct ast_vhub_dev dev; +}; + +/* Global vhub structure */ +struct ast_vhub { + struct platform_device *pdev; + void __iomem *regs; + int irq; + spinlock_t lock; + struct work_struct wake_work; + struct clk *clk; + + /* EP0 DMA buffers allocated in one chunk */ + void *ep0_bufs; + dma_addr_t ep0_bufs_dma; + + /* EP0 of the vhub itself */ + struct ast_vhub_ep ep0; + + /* State of vhub ep1 */ + bool ep1_stalled : 1; + + /* Per-port info */ + struct ast_vhub_port ports[AST_VHUB_NUM_PORTS]; + + /* Generic EP data structures */ + struct ast_vhub_ep epns[AST_VHUB_NUM_GEN_EPs]; + + /* Upstream bus is suspended ? */ + bool suspended : 1; + + /* Hub itself can signal remote wakeup */ + bool wakeup_en : 1; + + /* Force full speed only */ + bool force_usb1 : 1; + + /* Upstream bus speed captured at bus reset */ + unsigned int speed; +}; + +/* Standard request handlers result codes */ +enum std_req_rc { + std_req_stall = -1, /* Stall requested */ + std_req_complete = 0, /* Request completed with no data */ + std_req_data = 1, /* Request completed with data */ + std_req_driver = 2, /* Pass to driver pls */ +}; + +#ifdef CONFIG_USB_GADGET_VERBOSE +#define UDCVDBG(u, fmt...) dev_dbg(&(u)->pdev->dev, fmt) + +#define EPVDBG(ep, fmt, ...) do { \ + dev_dbg(&(ep)->vhub->pdev->dev, \ + "%s:EP%d " fmt, \ + (ep)->dev ? (ep)->dev->name : "hub", \ + (ep)->d_idx, ##__VA_ARGS__); \ + } while(0) + +#define DVDBG(d, fmt, ...) do { \ + dev_dbg(&(d)->vhub->pdev->dev, \ + "%s " fmt, (d)->name, \ + ##__VA_ARGS__); \ + } while(0) + +#else +#define UDCVDBG(u, fmt...) do { } while(0) +#define EPVDBG(ep, fmt, ...) do { } while(0) +#define DVDBG(d, fmt, ...) do { } while(0) +#endif + +#ifdef CONFIG_USB_GADGET_DEBUG +#define UDCDBG(u, fmt...) dev_dbg(&(u)->pdev->dev, fmt) + +#define EPDBG(ep, fmt, ...) do { \ + dev_dbg(&(ep)->vhub->pdev->dev, \ + "%s:EP%d " fmt, \ + (ep)->dev ? (ep)->dev->name : "hub", \ + (ep)->d_idx, ##__VA_ARGS__); \ + } while(0) + +#define DDBG(d, fmt, ...) do { \ + dev_dbg(&(d)->vhub->pdev->dev, \ + "%s " fmt, (d)->name, \ + ##__VA_ARGS__); \ + } while(0) +#else +#define UDCDBG(u, fmt...) do { } while(0) +#define EPDBG(ep, fmt, ...) do { } while(0) +#define DDBG(d, fmt, ...) do { } while(0) +#endif + +/* core.c */ +void ast_vhub_done(struct ast_vhub_ep *ep, struct ast_vhub_req *req, + int status); +void ast_vhub_nuke(struct ast_vhub_ep *ep, int status); +struct usb_request *ast_vhub_alloc_request(struct usb_ep *u_ep, + gfp_t gfp_flags); +void ast_vhub_free_request(struct usb_ep *u_ep, struct usb_request *u_req); +void ast_vhub_init_hw(struct ast_vhub *vhub); + +/* ep0.c */ +void ast_vhub_ep0_handle_ack(struct ast_vhub_ep *ep, bool in_ack); +void ast_vhub_ep0_handle_setup(struct ast_vhub_ep *ep); +void ast_vhub_init_ep0(struct ast_vhub *vhub, struct ast_vhub_ep *ep, + struct ast_vhub_dev *dev); +int ast_vhub_reply(struct ast_vhub_ep *ep, char *ptr, int len); +int __ast_vhub_simple_reply(struct ast_vhub_ep *ep, int len, ...); +#define ast_vhub_simple_reply(udc, ...) \ + __ast_vhub_simple_reply((udc), \ + sizeof((u8[]) { __VA_ARGS__ })/sizeof(u8), \ + __VA_ARGS__) + +/* hub.c */ +void ast_vhub_init_hub(struct ast_vhub *vhub); +enum std_req_rc ast_vhub_std_hub_request(struct ast_vhub_ep *ep, + struct usb_ctrlrequest *crq); +enum std_req_rc ast_vhub_class_hub_request(struct ast_vhub_ep *ep, + struct usb_ctrlrequest *crq); +void ast_vhub_device_connect(struct ast_vhub *vhub, unsigned int port, + bool on); +void ast_vhub_hub_suspend(struct ast_vhub *vhub); +void ast_vhub_hub_resume(struct ast_vhub *vhub); +void ast_vhub_hub_reset(struct ast_vhub *vhub); +void ast_vhub_hub_wake_all(struct ast_vhub *vhub); + +/* dev.c */ +int ast_vhub_init_dev(struct ast_vhub *vhub, unsigned int idx); +void ast_vhub_del_dev(struct ast_vhub_dev *d); +void ast_vhub_dev_irq(struct ast_vhub_dev *d); +int ast_vhub_std_dev_request(struct ast_vhub_ep *ep, + struct usb_ctrlrequest *crq); + +/* epn.c */ +void ast_vhub_epn_ack_irq(struct ast_vhub_ep *ep); +void ast_vhub_update_epn_stall(struct ast_vhub_ep *ep); +struct ast_vhub_ep *ast_vhub_alloc_epn(struct ast_vhub_dev *d, u8 addr); +void ast_vhub_dev_suspend(struct ast_vhub_dev *d); +void ast_vhub_dev_resume(struct ast_vhub_dev *d); +void ast_vhub_dev_reset(struct ast_vhub_dev *d); + +#endif /* __ASPEED_VHUB_H */ -- cgit v1.1 From 9286e24b837151a5a59e7403cea3e4a2c33ba225 Mon Sep 17 00:00:00 2001 From: Jerry Zhang Date: Fri, 30 Mar 2018 17:54:24 -0700 Subject: usb: gadget: f_midi: Use refcount when freeing f_midi_opts Currently, the midi function is not freed until it is both removed from the config and released by the user. Since the user could take a long time to release the card, it's possible that the function could be unlinked and thus f_midi_opts would be null when freeing f_midi. Thus, refcount f_midi_opts and only free it when it is unlinked and all f_midis have been freed. Signed-off-by: Jerry Zhang Signed-off-by: Felipe Balbi --- drivers/usb/gadget/function/f_midi.c | 26 ++++++++++++++++++++------ 1 file changed, 20 insertions(+), 6 deletions(-) (limited to 'drivers/usb') diff --git a/drivers/usb/gadget/function/f_midi.c b/drivers/usb/gadget/function/f_midi.c index e8f35db..f806997 100644 --- a/drivers/usb/gadget/function/f_midi.c +++ b/drivers/usb/gadget/function/f_midi.c @@ -109,6 +109,7 @@ static inline struct f_midi *func_to_midi(struct usb_function *f) static void f_midi_transmit(struct f_midi *midi); static void f_midi_rmidi_free(struct snd_rawmidi *rmidi); +static void f_midi_free_inst(struct usb_function_instance *f); DECLARE_UAC_AC_HEADER_DESCRIPTOR(1); DECLARE_USB_MIDI_OUT_JACK_DESCRIPTOR(1); @@ -1102,7 +1103,7 @@ static ssize_t f_midi_opts_##name##_store(struct config_item *item, \ u32 num; \ \ mutex_lock(&opts->lock); \ - if (opts->refcnt) { \ + if (opts->refcnt > 1) { \ ret = -EBUSY; \ goto end; \ } \ @@ -1157,7 +1158,7 @@ static ssize_t f_midi_opts_id_store(struct config_item *item, char *c; mutex_lock(&opts->lock); - if (opts->refcnt) { + if (opts->refcnt > 1) { ret = -EBUSY; goto end; } @@ -1198,13 +1199,21 @@ static const struct config_item_type midi_func_type = { static void f_midi_free_inst(struct usb_function_instance *f) { struct f_midi_opts *opts; + bool free = false; opts = container_of(f, struct f_midi_opts, func_inst); - if (opts->id_allocated) - kfree(opts->id); + mutex_lock(&opts->lock); + if (!--opts->refcnt) { + free = true; + } + mutex_unlock(&opts->lock); - kfree(opts); + if (free) { + if (opts->id_allocated) + kfree(opts->id); + kfree(opts); + } } static struct usb_function_instance *f_midi_alloc_inst(void) @@ -1223,6 +1232,7 @@ static struct usb_function_instance *f_midi_alloc_inst(void) opts->qlen = 32; opts->in_ports = 1; opts->out_ports = 1; + opts->refcnt = 1; config_group_init_type_name(&opts->func_inst.group, "", &midi_func_type); @@ -1234,6 +1244,7 @@ static void f_midi_free(struct usb_function *f) { struct f_midi *midi; struct f_midi_opts *opts; + bool free = false; midi = func_to_midi(f); opts = container_of(f->fi, struct f_midi_opts, func_inst); @@ -1242,9 +1253,12 @@ static void f_midi_free(struct usb_function *f) kfree(midi->id); kfifo_free(&midi->in_req_fifo); kfree(midi); - --opts->refcnt; + free = true; } mutex_unlock(&opts->lock); + + if (free) + f_midi_free_inst(&opts->func_inst); } static void f_midi_rmidi_free(struct snd_rawmidi *rmidi) -- cgit v1.1 From 6819e3233f244be6e8ea4aba139434ada0698743 Mon Sep 17 00:00:00 2001 From: Jerry Zhang Date: Fri, 30 Mar 2018 15:32:19 -0700 Subject: usb: gadget: f_fs: Add compat_ioctl to epfiles MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit This allows 32 bit owners of ffs endpoints to make ioctls into a 64 bit kernel. All of the current epfile ioctls can be handled with the same struct definitions as regular ioctl. Acked-by: MichaÅ‚ Nazarewicz Signed-off-by: Jerry Zhang Signed-off-by: Felipe Balbi --- drivers/usb/gadget/function/f_fs.c | 11 +++++++++++ 1 file changed, 11 insertions(+) (limited to 'drivers/usb') diff --git a/drivers/usb/gadget/function/f_fs.c b/drivers/usb/gadget/function/f_fs.c index 0294e4f..199d257 100644 --- a/drivers/usb/gadget/function/f_fs.c +++ b/drivers/usb/gadget/function/f_fs.c @@ -1266,6 +1266,14 @@ static long ffs_epfile_ioctl(struct file *file, unsigned code, return ret; } +#ifdef CONFIG_COMPAT +static long ffs_epfile_compat_ioctl(struct file *file, unsigned code, + unsigned long value) +{ + return ffs_epfile_ioctl(file, code, value); +} +#endif + static const struct file_operations ffs_epfile_operations = { .llseek = no_llseek, @@ -1274,6 +1282,9 @@ static const struct file_operations ffs_epfile_operations = { .read_iter = ffs_epfile_read_iter, .release = ffs_epfile_release, .unlocked_ioctl = ffs_epfile_ioctl, +#ifdef CONFIG_COMPAT + .compat_ioctl = ffs_epfile_compat_ioctl, +#endif }; -- cgit v1.1 From 3e1d333f6b84d050870ccdc2d9e88679937f1b6f Mon Sep 17 00:00:00 2001 From: Dmitry Osipenko Date: Tue, 10 Apr 2018 01:02:57 +0300 Subject: usb: phy: tegra: Cleanup error messages Tegra's PHY driver has a mix of pr_err() and dev_err(), let's switch to dev_err() and use common errors message formatting across the driver for consistency. Signed-off-by: Dmitry Osipenko Signed-off-by: Felipe Balbi --- drivers/usb/phy/phy-tegra-usb.c | 69 ++++++++++++++++++++++++----------------- 1 file changed, 41 insertions(+), 28 deletions(-) (limited to 'drivers/usb') diff --git a/drivers/usb/phy/phy-tegra-usb.c b/drivers/usb/phy/phy-tegra-usb.c index 0e8d23e..e46219e 100644 --- a/drivers/usb/phy/phy-tegra-usb.c +++ b/drivers/usb/phy/phy-tegra-usb.c @@ -236,10 +236,14 @@ static void set_phcd(struct tegra_usb_phy *phy, bool enable) static int utmip_pad_open(struct tegra_usb_phy *phy) { + int err; + phy->pad_clk = devm_clk_get(phy->u_phy.dev, "utmi-pads"); if (IS_ERR(phy->pad_clk)) { - pr_err("%s: can't get utmip pad clock\n", __func__); - return PTR_ERR(phy->pad_clk); + err = PTR_ERR(phy->pad_clk); + dev_err(phy->u_phy.dev, + "Failed to get UTMIP pad clock: %d\n", err); + return err; } return 0; @@ -282,7 +286,7 @@ static int utmip_pad_power_off(struct tegra_usb_phy *phy) void __iomem *base = phy->pad_regs; if (!utmip_pad_count) { - pr_err("%s: utmip pad already powered off\n", __func__); + dev_err(phy->u_phy.dev, "UTMIP pad already powered off\n"); return -EINVAL; } @@ -338,7 +342,8 @@ static void utmi_phy_clk_disable(struct tegra_usb_phy *phy) set_phcd(phy, true); if (utmi_wait_register(base + USB_SUSP_CTRL, USB_PHY_CLK_VALID, 0) < 0) - pr_err("%s: timeout waiting for phy to stabilize\n", __func__); + dev_err(phy->u_phy.dev, + "Timeout waiting for PHY to stabilize on disable\n"); } static void utmi_phy_clk_enable(struct tegra_usb_phy *phy) @@ -370,7 +375,8 @@ static void utmi_phy_clk_enable(struct tegra_usb_phy *phy) if (utmi_wait_register(base + USB_SUSP_CTRL, USB_PHY_CLK_VALID, USB_PHY_CLK_VALID)) - pr_err("%s: timeout waiting for phy to stabilize\n", __func__); + dev_err(phy->u_phy.dev, + "Timeout waiting for PHY to stabilize on enable\n"); } static int utmi_phy_power_on(struct tegra_usb_phy *phy) @@ -617,15 +623,15 @@ static int ulpi_phy_power_on(struct tegra_usb_phy *phy) ret = gpio_direction_output(phy->reset_gpio, 0); if (ret < 0) { - dev_err(phy->u_phy.dev, "gpio %d not set to 0\n", - phy->reset_gpio); + dev_err(phy->u_phy.dev, "GPIO %d not set to 0: %d\n", + phy->reset_gpio, ret); return ret; } msleep(5); ret = gpio_direction_output(phy->reset_gpio, 1); if (ret < 0) { - dev_err(phy->u_phy.dev, "gpio %d not set to 1\n", - phy->reset_gpio); + dev_err(phy->u_phy.dev, "GPIO %d not set to 1: %d\n", + phy->reset_gpio, ret); return ret; } @@ -661,13 +667,13 @@ static int ulpi_phy_power_on(struct tegra_usb_phy *phy) /* Fix VbusInvalid due to floating VBUS */ ret = usb_phy_io_write(phy->ulpi, 0x40, 0x08); if (ret) { - pr_err("%s: ulpi write failed\n", __func__); + dev_err(phy->u_phy.dev, "ULPI write failed: %d\n", ret); return ret; } ret = usb_phy_io_write(phy->ulpi, 0x80, 0x0B); if (ret) { - pr_err("%s: ulpi write failed\n", __func__); + dev_err(phy->u_phy.dev, "ULPI write failed: %d\n", ret); return ret; } @@ -728,28 +734,30 @@ static int ulpi_open(struct tegra_usb_phy *phy) phy->clk = devm_clk_get(phy->u_phy.dev, "ulpi-link"); if (IS_ERR(phy->clk)) { - pr_err("%s: can't get ulpi clock\n", __func__); - return PTR_ERR(phy->clk); + err = PTR_ERR(phy->clk); + dev_err(phy->u_phy.dev, "Failed to get ULPI clock: %d\n", err); + return err; } err = devm_gpio_request(phy->u_phy.dev, phy->reset_gpio, "ulpi_phy_reset_b"); if (err < 0) { - dev_err(phy->u_phy.dev, "request failed for gpio: %d\n", - phy->reset_gpio); + dev_err(phy->u_phy.dev, "Request failed for GPIO %d: %d\n", + phy->reset_gpio, err); return err; } err = gpio_direction_output(phy->reset_gpio, 0); if (err < 0) { - dev_err(phy->u_phy.dev, "gpio %d direction not set to output\n", - phy->reset_gpio); + dev_err(phy->u_phy.dev, + "GPIO %d direction not set to output: %d\n", + phy->reset_gpio, err); return err; } phy->ulpi = otg_ulpi_create(&ulpi_viewport_access_ops, 0); if (!phy->ulpi) { - dev_err(phy->u_phy.dev, "otg_ulpi_create returned NULL\n"); + dev_err(phy->u_phy.dev, "Failed to create ULPI OTG\n"); err = -ENOMEM; return err; } @@ -766,8 +774,10 @@ static int tegra_usb_phy_init(struct tegra_usb_phy *phy) phy->pll_u = devm_clk_get(phy->u_phy.dev, "pll_u"); if (IS_ERR(phy->pll_u)) { - pr_err("Can't get pll_u clock\n"); - return PTR_ERR(phy->pll_u); + err = PTR_ERR(phy->pll_u); + dev_err(phy->u_phy.dev, + "Failed to get pll_u clock: %d\n", err); + return err; } err = clk_prepare_enable(phy->pll_u); @@ -782,7 +792,8 @@ static int tegra_usb_phy_init(struct tegra_usb_phy *phy) } } if (!phy->freq) { - pr_err("invalid pll_u parent rate %ld\n", parent_rate); + dev_err(phy->u_phy.dev, "Invalid pll_u parent rate %ld\n", + parent_rate); err = -EINVAL; goto fail; } @@ -791,7 +802,7 @@ static int tegra_usb_phy_init(struct tegra_usb_phy *phy) err = regulator_enable(phy->vbus); if (err) { dev_err(phy->u_phy.dev, - "failed to enable usb vbus regulator: %d\n", + "Failed to enable USB VBUS regulator: %d\n", err); goto fail; } @@ -855,7 +866,8 @@ static int read_utmi_param(struct platform_device *pdev, const char *param, int err = of_property_read_u32(pdev->dev.of_node, param, &value); *dest = (u8)value; if (err < 0) - dev_err(&pdev->dev, "Failed to read USB UTMI parameter %s: %d\n", + dev_err(&pdev->dev, + "Failed to read USB UTMI parameter %s: %d\n", param, err); return err; } @@ -871,14 +883,14 @@ static int utmi_phy_probe(struct tegra_usb_phy *tegra_phy, res = platform_get_resource(pdev, IORESOURCE_MEM, 1); if (!res) { - dev_err(&pdev->dev, "Failed to get UTMI Pad regs\n"); + dev_err(&pdev->dev, "Failed to get UTMI pad regs\n"); return -ENXIO; } tegra_phy->pad_regs = devm_ioremap(&pdev->dev, res->start, resource_size(res)); if (!tegra_phy->pad_regs) { - dev_err(&pdev->dev, "Failed to remap UTMI Pad regs\n"); + dev_err(&pdev->dev, "Failed to remap UTMI pad regs\n"); return -ENOMEM; } @@ -1020,15 +1032,16 @@ static int tegra_usb_phy_probe(struct platform_device *pdev) tegra_phy->reset_gpio = of_get_named_gpio(np, "nvidia,phy-reset-gpio", 0); if (!gpio_is_valid(tegra_phy->reset_gpio)) { - dev_err(&pdev->dev, "invalid gpio: %d\n", - tegra_phy->reset_gpio); + dev_err(&pdev->dev, + "Invalid GPIO: %d\n", tegra_phy->reset_gpio); return tegra_phy->reset_gpio; } tegra_phy->config = NULL; break; default: - dev_err(&pdev->dev, "phy_type is invalid or unsupported\n"); + dev_err(&pdev->dev, "phy_type %u is invalid or unsupported\n", + phy_type); return -EINVAL; } -- cgit v1.1 From d2b9889f77165891378d79efd40d74e0162f56d8 Mon Sep 17 00:00:00 2001 From: Dmitry Osipenko Date: Tue, 10 Apr 2018 01:02:58 +0300 Subject: usb: tegra: Move utmi-pads reset from ehci-tegra to tegra-phy UTMI pads are shared by USB controllers and reset of UTMI pads is shared with the reset of USB1 controller. Currently reset of UTMI pads is done by the EHCI driver and ChipIdea UDC works because EHCI driver always happen to be probed first. Move reset controls from ehci-tegra to tegra-phy in order to resolve the problem. Signed-off-by: Dmitry Osipenko Signed-off-by: Felipe Balbi --- drivers/usb/host/ehci-tegra.c | 87 ++++++++++++++++++----------------------- drivers/usb/phy/phy-tegra-usb.c | 79 ++++++++++++++++++++++++++++++++++--- 2 files changed, 113 insertions(+), 53 deletions(-) (limited to 'drivers/usb') diff --git a/drivers/usb/host/ehci-tegra.c b/drivers/usb/host/ehci-tegra.c index a6f4389..4d2cdec 100644 --- a/drivers/usb/host/ehci-tegra.c +++ b/drivers/usb/host/ehci-tegra.c @@ -36,7 +36,6 @@ #define DRV_NAME "tegra-ehci" static struct hc_driver __read_mostly tegra_ehci_hc_driver; -static bool usb1_reset_attempted; struct tegra_ehci_soc_config { bool has_hostpc; @@ -51,67 +50,54 @@ struct tegra_ehci_hcd { enum tegra_usb_phy_port_speed port_speed; }; -/* - * The 1st USB controller contains some UTMI pad registers that are global for - * all the controllers on the chip. Those registers are also cleared when - * reset is asserted to the 1st controller. This means that the 1st controller - * can only be reset when no other controlled has finished probing. So we'll - * reset the 1st controller before doing any other setup on any of the - * controllers, and then never again. - * - * Since this is a PHY issue, the Tegra PHY driver should probably be doing - * the resetting of the USB controllers. But to keep compatibility with old - * device trees that don't have reset phandles in the PHYs, do it here. - * Those old DTs will be vulnerable to total USB breakage if the 1st EHCI - * device isn't the first one to finish probing, so warn them. - */ static int tegra_reset_usb_controller(struct platform_device *pdev) { struct device_node *phy_np; struct usb_hcd *hcd = platform_get_drvdata(pdev); struct tegra_ehci_hcd *tegra = (struct tegra_ehci_hcd *)hcd_to_ehci(hcd)->priv; - bool has_utmi_pad_registers = false; + struct reset_control *rst; + int err; phy_np = of_parse_phandle(pdev->dev.of_node, "nvidia,phy", 0); if (!phy_np) return -ENOENT; - if (of_property_read_bool(phy_np, "nvidia,has-utmi-pad-registers")) - has_utmi_pad_registers = true; + /* + * The 1st USB controller contains some UTMI pad registers that are + * global for all the controllers on the chip. Those registers are + * also cleared when reset is asserted to the 1st controller. + */ + rst = of_reset_control_get_shared(phy_np, "utmi-pads"); + if (IS_ERR(rst)) { + dev_warn(&pdev->dev, + "can't get utmi-pads reset from the PHY\n"); + dev_warn(&pdev->dev, + "continuing, but please update your DT\n"); + } else { + /* + * PHY driver performs UTMI-pads reset in a case of + * non-legacy DT. + */ + reset_control_put(rst); + } - if (!usb1_reset_attempted) { - struct reset_control *usb1_reset; + of_node_put(phy_np); - if (!has_utmi_pad_registers) - usb1_reset = of_reset_control_get(phy_np, "utmi-pads"); - else - usb1_reset = tegra->rst; - - if (IS_ERR(usb1_reset)) { - dev_warn(&pdev->dev, - "can't get utmi-pads reset from the PHY\n"); - dev_warn(&pdev->dev, - "continuing, but please update your DT\n"); - } else { - reset_control_assert(usb1_reset); - udelay(1); - reset_control_deassert(usb1_reset); - - if (!has_utmi_pad_registers) - reset_control_put(usb1_reset); - } + /* reset control is shared, hence initialize it first */ + err = reset_control_deassert(tegra->rst); + if (err) + return err; - usb1_reset_attempted = true; - } + err = reset_control_assert(tegra->rst); + if (err) + return err; - if (!has_utmi_pad_registers) { - reset_control_assert(tegra->rst); - udelay(1); - reset_control_deassert(tegra->rst); - } + udelay(1); - of_node_put(phy_np); + err = reset_control_deassert(tegra->rst); + if (err) + return err; return 0; } @@ -440,7 +426,7 @@ static int tegra_ehci_probe(struct platform_device *pdev) goto cleanup_hcd_create; } - tegra->rst = devm_reset_control_get(&pdev->dev, "usb"); + tegra->rst = devm_reset_control_get_shared(&pdev->dev, "usb"); if (IS_ERR(tegra->rst)) { dev_err(&pdev->dev, "Can't get ehci reset\n"); err = PTR_ERR(tegra->rst); @@ -452,8 +438,10 @@ static int tegra_ehci_probe(struct platform_device *pdev) goto cleanup_hcd_create; err = tegra_reset_usb_controller(pdev); - if (err) + if (err) { + dev_err(&pdev->dev, "Failed to reset controller\n"); goto cleanup_clk_en; + } u_phy = devm_usb_get_phy_by_phandle(&pdev->dev, "nvidia,phy", 0); if (IS_ERR(u_phy)) { @@ -538,6 +526,9 @@ static int tegra_ehci_remove(struct platform_device *pdev) usb_phy_shutdown(hcd->usb_phy); usb_remove_hcd(hcd); + reset_control_assert(tegra->rst); + udelay(1); + clk_disable_unprepare(tegra->clk); usb_put_hcd(hcd); diff --git a/drivers/usb/phy/phy-tegra-usb.c b/drivers/usb/phy/phy-tegra-usb.c index e46219e..ea7ef1d 100644 --- a/drivers/usb/phy/phy-tegra-usb.c +++ b/drivers/usb/phy/phy-tegra-usb.c @@ -236,17 +236,83 @@ static void set_phcd(struct tegra_usb_phy *phy, bool enable) static int utmip_pad_open(struct tegra_usb_phy *phy) { - int err; + int ret; phy->pad_clk = devm_clk_get(phy->u_phy.dev, "utmi-pads"); if (IS_ERR(phy->pad_clk)) { - err = PTR_ERR(phy->pad_clk); + ret = PTR_ERR(phy->pad_clk); dev_err(phy->u_phy.dev, - "Failed to get UTMIP pad clock: %d\n", err); - return err; + "Failed to get UTMIP pad clock: %d\n", ret); + return ret; } - return 0; + phy->pad_rst = devm_reset_control_get_optional_shared( + phy->u_phy.dev, "utmi-pads"); + if (IS_ERR(phy->pad_rst)) { + ret = PTR_ERR(phy->pad_rst); + dev_err(phy->u_phy.dev, + "Failed to get UTMI-pads reset: %d\n", ret); + return ret; + } + + ret = clk_prepare_enable(phy->pad_clk); + if (ret) { + dev_err(phy->u_phy.dev, + "Failed to enable UTMI-pads clock: %d\n", ret); + return ret; + } + + spin_lock(&utmip_pad_lock); + + ret = reset_control_deassert(phy->pad_rst); + if (ret) { + dev_err(phy->u_phy.dev, + "Failed to initialize UTMI-pads reset: %d\n", ret); + goto unlock; + } + + ret = reset_control_assert(phy->pad_rst); + if (ret) { + dev_err(phy->u_phy.dev, + "Failed to assert UTMI-pads reset: %d\n", ret); + goto unlock; + } + + udelay(1); + + ret = reset_control_deassert(phy->pad_rst); + if (ret) + dev_err(phy->u_phy.dev, + "Failed to deassert UTMI-pads reset: %d\n", ret); +unlock: + spin_unlock(&utmip_pad_lock); + + clk_disable_unprepare(phy->pad_clk); + + return ret; +} + +static int utmip_pad_close(struct tegra_usb_phy *phy) +{ + int ret; + + ret = clk_prepare_enable(phy->pad_clk); + if (ret) { + dev_err(phy->u_phy.dev, + "Failed to enable UTMI-pads clock: %d\n", ret); + return ret; + } + + ret = reset_control_assert(phy->pad_rst); + if (ret) + dev_err(phy->u_phy.dev, + "Failed to assert UTMI-pads reset: %d\n", ret); + + udelay(1); + + clk_disable_unprepare(phy->pad_clk); + + return ret; } static void utmip_pad_power_on(struct tegra_usb_phy *phy) @@ -700,6 +766,9 @@ static void tegra_usb_phy_close(struct tegra_usb_phy *phy) if (!IS_ERR(phy->vbus)) regulator_disable(phy->vbus); + if (!phy->is_ulpi_phy) + utmip_pad_close(phy); + clk_disable_unprepare(phy->pll_u); } -- cgit v1.1 From e10d3fc5bcb06989db65c57d5a690dc453e11cf8 Mon Sep 17 00:00:00 2001 From: Dmitry Osipenko Date: Tue, 10 Apr 2018 01:02:59 +0300 Subject: usb: phy: Add Kconfig entry for Tegra PHY driver Tegra's EHCI driver has a build dependency on Tegra's PHY driver and currently Tegra's PHY driver is built only when Tegra's EHCI driver is built. Add own Kconfig entry for the Tegra's PHY driver so that drivers other than ehci-tegra (like ChipIdea UDC) could work with ehci-tegra driver being disabled in kernels config by allowing user to manually select the PHY driver. Signed-off-by: Dmitry Osipenko Signed-off-by: Felipe Balbi --- drivers/usb/host/Kconfig | 4 +--- drivers/usb/phy/Kconfig | 9 +++++++++ drivers/usb/phy/Makefile | 2 +- 3 files changed, 11 insertions(+), 4 deletions(-) (limited to 'drivers/usb') diff --git a/drivers/usb/host/Kconfig b/drivers/usb/host/Kconfig index 5d958da..9f0aeb0 100644 --- a/drivers/usb/host/Kconfig +++ b/drivers/usb/host/Kconfig @@ -234,9 +234,7 @@ config USB_EHCI_TEGRA tristate "NVIDIA Tegra HCD support" depends on ARCH_TEGRA select USB_EHCI_ROOT_HUB_TT - select USB_PHY - select USB_ULPI - select USB_ULPI_VIEWPORT + select USB_TEGRA_PHY help This driver enables support for the internal USB Host Controllers found in NVIDIA Tegra SoCs. The controllers are EHCI compliant. diff --git a/drivers/usb/phy/Kconfig b/drivers/usb/phy/Kconfig index 0f8ab98..b9b0a44 100644 --- a/drivers/usb/phy/Kconfig +++ b/drivers/usb/phy/Kconfig @@ -159,6 +159,15 @@ config USB_MXS_PHY MXS Phy is used by some of the i.MX SoCs, for example imx23/28/6x. +config USB_TEGRA_PHY + tristate "NVIDIA Tegra USB PHY Driver" + depends on ARCH_TEGRA + select USB_PHY + select USB_ULPI + help + This driver provides PHY support for the USB controllers found + on NVIDIA Tegra SoC's. + config USB_ULPI bool "Generic ULPI Transceiver Driver" depends on ARM || ARM64 diff --git a/drivers/usb/phy/Makefile b/drivers/usb/phy/Makefile index 25e579f..df1d990 100644 --- a/drivers/usb/phy/Makefile +++ b/drivers/usb/phy/Makefile @@ -16,7 +16,7 @@ obj-$(CONFIG_AM335X_CONTROL_USB) += phy-am335x-control.o obj-$(CONFIG_AM335X_PHY_USB) += phy-am335x.o obj-$(CONFIG_OMAP_OTG) += phy-omap-otg.o obj-$(CONFIG_TWL6030_USB) += phy-twl6030-usb.o -obj-$(CONFIG_USB_EHCI_TEGRA) += phy-tegra-usb.o +obj-$(CONFIG_USB_TEGRA_PHY) += phy-tegra-usb.o obj-$(CONFIG_USB_GPIO_VBUS) += phy-gpio-vbus-usb.o obj-$(CONFIG_USB_ISP1301) += phy-isp1301.o obj-$(CONFIG_USB_MV_OTG) += phy-mv-usb.o -- cgit v1.1 From 8836b39a1601d16c2cae698a1511fdbdd1fbf93f Mon Sep 17 00:00:00 2001 From: Wolfram Sang Date: Thu, 19 Apr 2018 16:06:25 +0200 Subject: usb: mtu3: simplify getting .drvdata We should get drvdata from struct device directly. Going via platform_device is an unneeded step back and forth. Acked-by: Chunfeng Yun Signed-off-by: Wolfram Sang Signed-off-by: Felipe Balbi --- drivers/usb/mtu3/mtu3_plat.c | 6 ++---- 1 file changed, 2 insertions(+), 4 deletions(-) (limited to 'drivers/usb') diff --git a/drivers/usb/mtu3/mtu3_plat.c b/drivers/usb/mtu3/mtu3_plat.c index 628d5ce..46551f6 100644 --- a/drivers/usb/mtu3/mtu3_plat.c +++ b/drivers/usb/mtu3/mtu3_plat.c @@ -447,8 +447,7 @@ static int mtu3_remove(struct platform_device *pdev) */ static int __maybe_unused mtu3_suspend(struct device *dev) { - struct platform_device *pdev = to_platform_device(dev); - struct ssusb_mtk *ssusb = platform_get_drvdata(pdev); + struct ssusb_mtk *ssusb = dev_get_drvdata(dev); dev_dbg(dev, "%s\n", __func__); @@ -466,8 +465,7 @@ static int __maybe_unused mtu3_suspend(struct device *dev) static int __maybe_unused mtu3_resume(struct device *dev) { - struct platform_device *pdev = to_platform_device(dev); - struct ssusb_mtk *ssusb = platform_get_drvdata(pdev); + struct ssusb_mtk *ssusb = dev_get_drvdata(dev); int ret; dev_dbg(dev, "%s\n", __func__); -- cgit v1.1 From 64f5b56c9183eb31505bdc08058e1cf4d4b4ba1b Mon Sep 17 00:00:00 2001 From: Wolfram Sang Date: Thu, 19 Apr 2018 16:06:26 +0200 Subject: usb: phy: simplify getting .drvdata We should get drvdata from struct device directly. Going via platform_device is an unneeded step back and forth. Signed-off-by: Wolfram Sang Signed-off-by: Felipe Balbi --- drivers/usb/phy/phy-am335x.c | 6 ++---- 1 file changed, 2 insertions(+), 4 deletions(-) (limited to 'drivers/usb') diff --git a/drivers/usb/phy/phy-am335x.c b/drivers/usb/phy/phy-am335x.c index b36fa8b..27bdb72 100644 --- a/drivers/usb/phy/phy-am335x.c +++ b/drivers/usb/phy/phy-am335x.c @@ -96,8 +96,7 @@ static int am335x_phy_remove(struct platform_device *pdev) #ifdef CONFIG_PM_SLEEP static int am335x_phy_suspend(struct device *dev) { - struct platform_device *pdev = to_platform_device(dev); - struct am335x_phy *am_phy = platform_get_drvdata(pdev); + struct am335x_phy *am_phy = dev_get_drvdata(dev); /* * Enable phy wakeup only if dev->power.can_wakeup is true. @@ -117,8 +116,7 @@ static int am335x_phy_suspend(struct device *dev) static int am335x_phy_resume(struct device *dev) { - struct platform_device *pdev = to_platform_device(dev); - struct am335x_phy *am_phy = platform_get_drvdata(pdev); + struct am335x_phy *am_phy = dev_get_drvdata(dev); phy_ctrl_power(am_phy->phy_ctrl, am_phy->id, am_phy->dr_mode, true); -- cgit v1.1 From 288ee3c36255d0c2d32830313f527e1474a09e9f Mon Sep 17 00:00:00 2001 From: Chunfeng Yun Date: Tue, 24 Apr 2018 10:52:46 +0800 Subject: usb: mtu3: avoid TX data length truncated in SS/SSP mode The variable of 'count' is declared as u8, this will cause an issue due to value truncated when works in SS or SSP mode and data length is greater than 255, so change it as u32. Signed-off-by: Chunfeng Yun Signed-off-by: Felipe Balbi --- drivers/usb/mtu3/mtu3_gadget_ep0.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers/usb') diff --git a/drivers/usb/mtu3/mtu3_gadget_ep0.c b/drivers/usb/mtu3/mtu3_gadget_ep0.c index ebdcf7a..d67b540 100644 --- a/drivers/usb/mtu3/mtu3_gadget_ep0.c +++ b/drivers/usb/mtu3/mtu3_gadget_ep0.c @@ -546,7 +546,7 @@ static void ep0_tx_state(struct mtu3 *mtu) struct usb_request *req; u32 csr; u8 *src; - u8 count; + u32 count; u32 maxp; dev_dbg(mtu->dev, "%s\n", __func__); -- cgit v1.1 From 00505adef8a8f8fbacd206fe0a4ef59b074c53e4 Mon Sep 17 00:00:00 2001 From: Chunfeng Yun Date: Tue, 24 Apr 2018 10:52:47 +0800 Subject: usb: mtu3: remove repeated setting of gadget state The usb_add_gadget_udc() will set the gadget state as USB_STATE_NOTATTACHED, so we needn't set it again. Signed-off-by: Chunfeng Yun Signed-off-by: Felipe Balbi --- drivers/usb/mtu3/mtu3_gadget.c | 8 ++------ 1 file changed, 2 insertions(+), 6 deletions(-) (limited to 'drivers/usb') diff --git a/drivers/usb/mtu3/mtu3_gadget.c b/drivers/usb/mtu3/mtu3_gadget.c index f05f10f..de0de01 100644 --- a/drivers/usb/mtu3/mtu3_gadget.c +++ b/drivers/usb/mtu3/mtu3_gadget.c @@ -660,14 +660,10 @@ int mtu3_gadget_setup(struct mtu3 *mtu) mtu3_gadget_init_eps(mtu); ret = usb_add_gadget_udc(mtu->dev, &mtu->g); - if (ret) { + if (ret) dev_err(mtu->dev, "failed to register udc\n"); - return ret; - } - usb_gadget_set_state(&mtu->g, USB_STATE_NOTATTACHED); - - return 0; + return ret; } void mtu3_gadget_cleanup(struct mtu3 *mtu) -- cgit v1.1 From 11254eb2def5e1556dbe97da58af3e76a0d5e8d7 Mon Sep 17 00:00:00 2001 From: Chunfeng Yun Date: Tue, 24 Apr 2018 10:52:48 +0800 Subject: usb: mtu3: fix an unrecognized issue when connected with PC When boot on the platform with the USB cable connected to Win7, the Win7 will pop up an error dialog: "USB Device not recognized", but finally the Win7 can enumerate it successfully. The root cause is as the following: When the xHCI driver set PORT_POWER of the OTG port, and if both IDPIN and VBUS_VALID are high at the same time, the MTU3 controller will set SESSION and pull up DP, so the Win7 can detect existence of USB device, but if the mtu3 driver can't switch to device mode during the debounce time, the Win7 can not enumerate it. Here to fix it by removing the 1s delayed EXTCON register to speed up mode switch. Signed-off-by: Chunfeng Yun Signed-off-by: Felipe Balbi --- drivers/usb/mtu3/mtu3.h | 4 ---- drivers/usb/mtu3/mtu3_dr.c | 25 +++---------------------- 2 files changed, 3 insertions(+), 26 deletions(-) (limited to 'drivers/usb') diff --git a/drivers/usb/mtu3/mtu3.h b/drivers/usb/mtu3/mtu3.h index 2cd00a2..a56fee0 100644 --- a/drivers/usb/mtu3/mtu3.h +++ b/drivers/usb/mtu3/mtu3.h @@ -197,9 +197,6 @@ struct mtu3_gpd_ring { * @edev: external connector used to detect vbus and iddig changes * @vbus_nb: notifier for vbus detection * @vbus_nb: notifier for iddig(idpin) detection -* @extcon_reg_dwork: delay work for extcon notifier register, waiting for -* xHCI driver initialization, it's necessary for system bootup -* as device. * @is_u3_drd: whether port0 supports usb3.0 dual-role device or not * @manual_drd_enabled: it's true when supports dual-role device by debugfs * to switch host/device modes depending on user input. @@ -209,7 +206,6 @@ struct otg_switch_mtk { struct extcon_dev *edev; struct notifier_block vbus_nb; struct notifier_block id_nb; - struct delayed_work extcon_reg_dwork; bool is_u3_drd; bool manual_drd_enabled; }; diff --git a/drivers/usb/mtu3/mtu3_dr.c b/drivers/usb/mtu3/mtu3_dr.c index db7562d..80083e0 100644 --- a/drivers/usb/mtu3/mtu3_dr.c +++ b/drivers/usb/mtu3/mtu3_dr.c @@ -238,15 +238,6 @@ static int ssusb_extcon_register(struct otg_switch_mtk *otg_sx) return 0; } -static void extcon_register_dwork(struct work_struct *work) -{ - struct delayed_work *dwork = to_delayed_work(work); - struct otg_switch_mtk *otg_sx = - container_of(dwork, struct otg_switch_mtk, extcon_reg_dwork); - - ssusb_extcon_register(otg_sx); -} - /* * We provide an interface via debugfs to switch between host and device modes * depending on user input. @@ -407,18 +398,10 @@ int ssusb_otg_switch_init(struct ssusb_mtk *ssusb) { struct otg_switch_mtk *otg_sx = &ssusb->otg_switch; - if (otg_sx->manual_drd_enabled) { + if (otg_sx->manual_drd_enabled) ssusb_debugfs_init(ssusb); - } else { - INIT_DELAYED_WORK(&otg_sx->extcon_reg_dwork, - extcon_register_dwork); - - /* - * It is enough to delay 1s for waiting for - * host initialization - */ - schedule_delayed_work(&otg_sx->extcon_reg_dwork, HZ); - } + else + ssusb_extcon_register(otg_sx); return 0; } @@ -429,6 +412,4 @@ void ssusb_otg_switch_exit(struct ssusb_mtk *ssusb) if (otg_sx->manual_drd_enabled) ssusb_debugfs_exit(ssusb); - else - cancel_delayed_work(&otg_sx->extcon_reg_dwork); } -- cgit v1.1 From f3b28e5e07ef5feaa0071050d14d5b6e6cb68060 Mon Sep 17 00:00:00 2001 From: Chunfeng Yun Date: Tue, 24 Apr 2018 10:52:49 +0800 Subject: usb: mtu3: fix operation failure when test TEST_J/K There is an error dialog popped up in PC when test TEST_J/K by EHSETT tool, due to not waiting for the completion of control transfer. Here fix it by entering test mode after Status Stage finish. Signed-off-by: Chunfeng Yun Signed-off-by: Felipe Balbi --- drivers/usb/mtu3/mtu3_gadget_ep0.c | 10 ++++++++++ 1 file changed, 10 insertions(+) (limited to 'drivers/usb') diff --git a/drivers/usb/mtu3/mtu3_gadget_ep0.c b/drivers/usb/mtu3/mtu3_gadget_ep0.c index d67b540..0d2b1cf 100644 --- a/drivers/usb/mtu3/mtu3_gadget_ep0.c +++ b/drivers/usb/mtu3/mtu3_gadget_ep0.c @@ -7,6 +7,7 @@ * Author: Chunfeng.Yun */ +#include #include #include "mtu3.h" @@ -263,6 +264,7 @@ static int handle_test_mode(struct mtu3 *mtu, struct usb_ctrlrequest *setup) { void __iomem *mbase = mtu->mac_base; int handled = 1; + u32 value; switch (le16_to_cpu(setup->wIndex) >> 8) { case TEST_J: @@ -292,6 +294,14 @@ static int handle_test_mode(struct mtu3 *mtu, struct usb_ctrlrequest *setup) if (mtu->test_mode_nr == TEST_PACKET_MODE) ep0_load_test_packet(mtu); + /* send status before entering test mode. */ + value = mtu3_readl(mbase, U3D_EP0CSR) & EP0_W1C_BITS; + mtu3_writel(mbase, U3D_EP0CSR, value | EP0_SETUPPKTRDY | EP0_DATAEND); + + /* wait for ACK status sent by host */ + readl_poll_timeout(mbase + U3D_EP0CSR, value, + !(value & EP0_DATAEND), 100, 5000); + mtu3_writel(mbase, U3D_USB2_TEST_MODE, mtu->test_mode_nr); mtu->ep0_state = MU3D_EP0_STATE_SETUP; -- cgit v1.1 From f39846824cd682c6662f90ec67bf136897cf60e8 Mon Sep 17 00:00:00 2001 From: Chunfeng Yun Date: Tue, 24 Apr 2018 10:52:50 +0800 Subject: usb: mtu3: make USB_MTU3_DUAL_ROLE depend on EXTCON but not USB_MTU3 In fact the driver depends on EXTCON only when it's configed as USB_MTU3_DUAL_ROLE, so make USB_MTU3_DUAL_ROLE depend on EXTCON but not USB_MTU3. Signed-off-by: Chunfeng Yun Signed-off-by: Felipe Balbi --- drivers/usb/mtu3/Kconfig | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) (limited to 'drivers/usb') diff --git a/drivers/usb/mtu3/Kconfig b/drivers/usb/mtu3/Kconfig index 25cd619..8daf277 100644 --- a/drivers/usb/mtu3/Kconfig +++ b/drivers/usb/mtu3/Kconfig @@ -2,7 +2,7 @@ config USB_MTU3 tristate "MediaTek USB3 Dual Role controller" - depends on EXTCON && (USB || USB_GADGET) && HAS_DMA + depends on (USB || USB_GADGET) && HAS_DMA depends on ARCH_MEDIATEK || COMPILE_TEST select USB_XHCI_MTK if USB_SUPPORT && USB_XHCI_HCD help @@ -40,6 +40,7 @@ config USB_MTU3_GADGET config USB_MTU3_DUAL_ROLE bool "Dual Role mode" depends on ((USB=y || USB=USB_MTU3) && (USB_GADGET=y || USB_GADGET=USB_MTU3)) + depends on (EXTCON=y || EXTCON=USB_MTU3) help This is the default mode of working of MTU3 controller where both host and gadget features are enabled. -- cgit v1.1 From 729cac693eecfebdb9e152eaddddd358ae2decb7 Mon Sep 17 00:00:00 2001 From: Minas Harutyunyan Date: Thu, 3 May 2018 17:24:28 +0400 Subject: usb: dwc2: Change ISOC DDMA flow Changed existing two descriptor-chain flow to one chain. In two-chain implementation BNA interrupt used for switching between two chains. BNA interrupt asserted because of returning to beginning of the chain based on L-bit of last descriptor. Because of that we lose packets. This issue resolved by using one desc-chain. Removed all staff related to two desc-chain flow from DDMA ISOC related functions. Removed request length checking from dwc2_gadget_fill_isoc_desc() function. Request length checking added to dwc2_hsotg_ep_queue() function. If request length greater than descriptor limits then request not added to queue. Additional checking done for High Bandwidth ISOC OUT's which not supported by driver. In dwc2_gadget_fill_isoc_desc() function also checked desc-chain status (full or not) to avoid of reusing not yet processed descriptors. In dwc2_gadget_start_isoc_ddma() function creation of desc-chain always started from descriptor 0. Before filling descriptors, they were initialized by HOST BUSY status. In dwc2_gadget_complete_isoc_request_ddma() added checking for desc-chain rollover. Also added checking completion status. Request completed successfully if DEV_DMA_STS is DEV_DMA_STS_SUCC, otherwise complete with actual=0. For systems with high IRQ latency added pointer compl_desc to next descriptor to be completed by XferCompl interrupt. This pointer replace descriptor index calculation based on DxEPDMA register. On descriptor completion interrupt processing all descriptors starting from compl_desc till descriptor which Buffer Status field not equal DMA_DONE status. Actually removed dwc2_gadget_start_next_isoc_ddma() function because now driver use only one desc-chain and instead that function added dwc2_gadget_handle_isoc_bna() function for handling BNA interrupts. Handling BNA interrupt done by flushing TxFIFOs for OUT EPs, completing request with actual=0 and resetting desc-chain number and target frame to initial values for restarting transfers. On handling NAK request completed with actual=0. Incremented target frame to allow fill desc chain and start transfers. In DDMA mode avoided of frame number incrementing, because tracking of frame number performed in dwc2_gadget_fill_isoc_desc() function. When core assert XferCompl along with BNA, we should ignore XferCompl in dwc2_hsotg_epint() function. On BNA interrupt replaced dwc2_gadget_start_next_isoc_ddma() by above mentioned BNA handler. In dwc2_hsotg_ep_enable() function added sanity check of bInterval for ISOC IN in DDMA mode, because HW doesn't supported EP's with bInterval more than 10 and check for mc for ISOC OUT transfers, because core doesn't support high bandwidth transfers. Signed-off-by: Minas Harutyunyan Signed-off-by: Felipe Balbi --- drivers/usb/dwc2/core.h | 4 +- drivers/usb/dwc2/gadget.c | 279 +++++++++++++++++++++++----------------------- 2 files changed, 139 insertions(+), 144 deletions(-) (limited to 'drivers/usb') diff --git a/drivers/usb/dwc2/core.h b/drivers/usb/dwc2/core.h index d83be56..274bf0a 100644 --- a/drivers/usb/dwc2/core.h +++ b/drivers/usb/dwc2/core.h @@ -178,8 +178,8 @@ struct dwc2_hsotg_req; * @desc_list_dma: The DMA address of descriptor chain currently in use. * @desc_list: Pointer to descriptor DMA chain head currently in use. * @desc_count: Count of entries within the DMA descriptor chain of EP. - * @isoc_chain_num: Number of ISOC chain currently in use - either 0 or 1. * @next_desc: index of next free descriptor in the ISOC chain under SW control. + * @compl_desc: index of next descriptor to be completed by xFerComplete * @total_data: The total number of data bytes done. * @fifo_size: The size of the FIFO (for periodic IN endpoints) * @fifo_load: The amount of data loaded into the FIFO (periodic IN) @@ -231,8 +231,8 @@ struct dwc2_hsotg_ep { struct dwc2_dma_desc *desc_list; u8 desc_count; - unsigned char isoc_chain_num; unsigned int next_desc; + unsigned int compl_desc; char name[10]; }; diff --git a/drivers/usb/dwc2/gadget.c b/drivers/usb/dwc2/gadget.c index 6c32bf2..ec88f7e 100644 --- a/drivers/usb/dwc2/gadget.c +++ b/drivers/usb/dwc2/gadget.c @@ -793,9 +793,7 @@ static void dwc2_gadget_config_nonisoc_xfer_ddma(struct dwc2_hsotg_ep *hs_ep, * @dma_buff: usb requests dma buffer. * @len: usb request transfer length. * - * Finds out index of first free entry either in the bottom or up half of - * descriptor chain depend on which is under SW control and not processed - * by HW. Then fills that descriptor with the data of the arrived usb request, + * Fills next free descriptor with the data of the arrived usb request, * frame info, sets Last and IOC bits increments next_desc. If filled * descriptor is not the first one, removes L bit from the previous descriptor * status. @@ -810,34 +808,17 @@ static int dwc2_gadget_fill_isoc_desc(struct dwc2_hsotg_ep *hs_ep, u32 mask = 0; maxsize = dwc2_gadget_get_desc_params(hs_ep, &mask); - if (len > maxsize) { - dev_err(hsotg->dev, "wrong len %d\n", len); - return -EINVAL; - } - /* - * If SW has already filled half of chain, then return and wait for - * the other chain to be processed by HW. - */ - if (hs_ep->next_desc == MAX_DMA_DESC_NUM_GENERIC / 2) - return -EBUSY; - - /* Increment frame number by interval for IN */ - if (hs_ep->dir_in) - dwc2_gadget_incr_frame_num(hs_ep); - - index = (MAX_DMA_DESC_NUM_GENERIC / 2) * hs_ep->isoc_chain_num + - hs_ep->next_desc; + index = hs_ep->next_desc; + desc = &hs_ep->desc_list[index]; - /* Sanity check of calculated index */ - if ((hs_ep->isoc_chain_num && index > MAX_DMA_DESC_NUM_GENERIC) || - (!hs_ep->isoc_chain_num && index > MAX_DMA_DESC_NUM_GENERIC / 2)) { - dev_err(hsotg->dev, "wrong index %d for iso chain\n", index); - return -EINVAL; + /* Check if descriptor chain full */ + if ((desc->status >> DEV_DMA_BUFF_STS_SHIFT) == + DEV_DMA_BUFF_STS_HREADY) { + dev_dbg(hsotg->dev, "%s: desc chain full\n", __func__); + return 1; } - desc = &hs_ep->desc_list[index]; - /* Clear L bit of previous desc if more than one entries in the chain */ if (hs_ep->next_desc) hs_ep->desc_list[index - 1].status &= ~DEV_DMA_L; @@ -865,8 +846,14 @@ static int dwc2_gadget_fill_isoc_desc(struct dwc2_hsotg_ep *hs_ep, desc->status &= ~DEV_DMA_BUFF_STS_MASK; desc->status |= (DEV_DMA_BUFF_STS_HREADY << DEV_DMA_BUFF_STS_SHIFT); + /* Increment frame number by interval for IN */ + if (hs_ep->dir_in) + dwc2_gadget_incr_frame_num(hs_ep); + /* Update index of last configured entry in the chain */ hs_ep->next_desc++; + if (hs_ep->next_desc >= MAX_DMA_DESC_NUM_GENERIC) + hs_ep->next_desc = 0; return 0; } @@ -875,11 +862,8 @@ static int dwc2_gadget_fill_isoc_desc(struct dwc2_hsotg_ep *hs_ep, * dwc2_gadget_start_isoc_ddma - start isochronous transfer in DDMA * @hs_ep: The isochronous endpoint. * - * Prepare first descriptor chain for isochronous endpoints. Afterwards + * Prepare descriptor chain for isochronous endpoints. Afterwards * write DMA address to HW and enable the endpoint. - * - * Switch between descriptor chains via isoc_chain_num to give SW opportunity - * to prepare second descriptor chain while first one is being processed by HW. */ static void dwc2_gadget_start_isoc_ddma(struct dwc2_hsotg_ep *hs_ep) { @@ -887,24 +871,34 @@ static void dwc2_gadget_start_isoc_ddma(struct dwc2_hsotg_ep *hs_ep) struct dwc2_hsotg_req *hs_req, *treq; int index = hs_ep->index; int ret; + int i; u32 dma_reg; u32 depctl; u32 ctrl; + struct dwc2_dma_desc *desc; if (list_empty(&hs_ep->queue)) { dev_dbg(hsotg->dev, "%s: No requests in queue\n", __func__); return; } + /* Initialize descriptor chain by Host Busy status */ + for (i = 0; i < MAX_DMA_DESC_NUM_GENERIC; i++) { + desc = &hs_ep->desc_list[i]; + desc->status = 0; + desc->status |= (DEV_DMA_BUFF_STS_HBUSY + << DEV_DMA_BUFF_STS_SHIFT); + } + + hs_ep->next_desc = 0; list_for_each_entry_safe(hs_req, treq, &hs_ep->queue, queue) { ret = dwc2_gadget_fill_isoc_desc(hs_ep, hs_req->req.dma, hs_req->req.length); - if (ret) { - dev_dbg(hsotg->dev, "%s: desc chain full\n", __func__); + if (ret) break; - } } + hs_ep->compl_desc = 0; depctl = hs_ep->dir_in ? DIEPCTL(index) : DOEPCTL(index); dma_reg = hs_ep->dir_in ? DIEPDMA(index) : DOEPDMA(index); @@ -914,10 +908,6 @@ static void dwc2_gadget_start_isoc_ddma(struct dwc2_hsotg_ep *hs_ep) ctrl = dwc2_readl(hsotg->regs + depctl); ctrl |= DXEPCTL_EPENA | DXEPCTL_CNAK; dwc2_writel(ctrl, hsotg->regs + depctl); - - /* Switch ISOC descriptor chain number being processed by SW*/ - hs_ep->isoc_chain_num = (hs_ep->isoc_chain_num ^ 1) & 0x1; - hs_ep->next_desc = 0; } /** @@ -1291,6 +1281,9 @@ static int dwc2_hsotg_ep_queue(struct usb_ep *ep, struct usb_request *req, struct dwc2_hsotg *hs = hs_ep->parent; bool first; int ret; + u32 maxsize = 0; + u32 mask = 0; + dev_dbg(hs->dev, "%s: req %p: %d@%p, noi=%d, zero=%d, snok=%d\n", ep->name, req, req->length, req->buf, req->no_interrupt, @@ -1308,6 +1301,24 @@ static int dwc2_hsotg_ep_queue(struct usb_ep *ep, struct usb_request *req, req->actual = 0; req->status = -EINPROGRESS; + /* In DDMA mode for ISOC's don't queue request if length greater + * than descriptor limits. + */ + if (using_desc_dma(hs) && hs_ep->isochronous) { + maxsize = dwc2_gadget_get_desc_params(hs_ep, &mask); + if (hs_ep->dir_in && req->length > maxsize) { + dev_err(hs->dev, "wrong length %d (maxsize=%d)\n", + req->length, maxsize); + return -EINVAL; + } + + if (!hs_ep->dir_in && req->length > hs_ep->ep.maxpacket) { + dev_err(hs->dev, "ISOC OUT: wrong length %d (mps=%d)\n", + req->length, hs_ep->ep.maxpacket); + return -EINVAL; + } + } + ret = dwc2_hsotg_handle_unaligned_buf_start(hs, hs_ep, hs_req); if (ret) return ret; @@ -1330,17 +1341,15 @@ static int dwc2_hsotg_ep_queue(struct usb_ep *ep, struct usb_request *req, /* * Handle DDMA isochronous transfers separately - just add new entry - * to the half of descriptor chain that is not processed by HW. + * to the descriptor chain. * Transfer will be started once SW gets either one of NAK or * OutTknEpDis interrupts. */ - if (using_desc_dma(hs) && hs_ep->isochronous && - hs_ep->target_frame != TARGET_FRAME_INITIAL) { - ret = dwc2_gadget_fill_isoc_desc(hs_ep, hs_req->req.dma, - hs_req->req.length); - if (ret) - dev_dbg(hs->dev, "%s: ISO desc chain full\n", __func__); - + if (using_desc_dma(hs) && hs_ep->isochronous) { + if (hs_ep->target_frame != TARGET_FRAME_INITIAL) { + dwc2_gadget_fill_isoc_desc(hs_ep, hs_req->req.dma, + hs_req->req.length); + } return 0; } @@ -2011,108 +2020,75 @@ static void dwc2_hsotg_complete_request(struct dwc2_hsotg *hsotg, * @hs_ep: The endpoint the request was on. * * Get first request from the ep queue, determine descriptor on which complete - * happened. SW based on isoc_chain_num discovers which half of the descriptor - * chain is currently in use by HW, adjusts dma_address and calculates index - * of completed descriptor based on the value of DEPDMA register. Update actual - * length of request, giveback to gadget. + * happened. SW discovers which descriptor currently in use by HW, adjusts + * dma_address and calculates index of completed descriptor based on the value + * of DEPDMA register. Update actual length of request, giveback to gadget. */ static void dwc2_gadget_complete_isoc_request_ddma(struct dwc2_hsotg_ep *hs_ep) { struct dwc2_hsotg *hsotg = hs_ep->parent; struct dwc2_hsotg_req *hs_req; struct usb_request *ureq; - int index; - dma_addr_t dma_addr; - u32 dma_reg; - u32 depdma; u32 desc_sts; u32 mask; - hs_req = get_ep_head(hs_ep); - if (!hs_req) { - dev_warn(hsotg->dev, "%s: ISOC EP queue empty\n", __func__); - return; - } - ureq = &hs_req->req; + desc_sts = hs_ep->desc_list[hs_ep->compl_desc].status; - dma_addr = hs_ep->desc_list_dma; + /* Process only descriptors with buffer status set to DMA done */ + while ((desc_sts & DEV_DMA_BUFF_STS_MASK) >> + DEV_DMA_BUFF_STS_SHIFT == DEV_DMA_BUFF_STS_DMADONE) { - /* - * If lower half of descriptor chain is currently use by SW, - * that means higher half is being processed by HW, so shift - * DMA address to higher half of descriptor chain. - */ - if (!hs_ep->isoc_chain_num) - dma_addr += sizeof(struct dwc2_dma_desc) * - (MAX_DMA_DESC_NUM_GENERIC / 2); - - dma_reg = hs_ep->dir_in ? DIEPDMA(hs_ep->index) : DOEPDMA(hs_ep->index); - depdma = dwc2_readl(hsotg->regs + dma_reg); - - index = (depdma - dma_addr) / sizeof(struct dwc2_dma_desc) - 1; - desc_sts = hs_ep->desc_list[index].status; - - mask = hs_ep->dir_in ? DEV_DMA_ISOC_TX_NBYTES_MASK : - DEV_DMA_ISOC_RX_NBYTES_MASK; - ureq->actual = ureq->length - - ((desc_sts & mask) >> DEV_DMA_ISOC_NBYTES_SHIFT); + hs_req = get_ep_head(hs_ep); + if (!hs_req) { + dev_warn(hsotg->dev, "%s: ISOC EP queue empty\n", __func__); + return; + } + ureq = &hs_req->req; + + /* Check completion status */ + if ((desc_sts & DEV_DMA_STS_MASK) >> DEV_DMA_STS_SHIFT == + DEV_DMA_STS_SUCC) { + mask = hs_ep->dir_in ? DEV_DMA_ISOC_TX_NBYTES_MASK : + DEV_DMA_ISOC_RX_NBYTES_MASK; + ureq->actual = ureq->length - ((desc_sts & mask) >> + DEV_DMA_ISOC_NBYTES_SHIFT); + + /* Adjust actual len for ISOC Out if len is + * not align of 4 + */ + if (!hs_ep->dir_in && ureq->length & 0x3) + ureq->actual += 4 - (ureq->length & 0x3); + } - /* Adjust actual length for ISOC Out if length is not align of 4 */ - if (!hs_ep->dir_in && ureq->length & 0x3) - ureq->actual += 4 - (ureq->length & 0x3); + dwc2_hsotg_complete_request(hsotg, hs_ep, hs_req, 0); - dwc2_hsotg_complete_request(hsotg, hs_ep, hs_req, 0); + hs_ep->compl_desc++; + if (hs_ep->compl_desc > (MAX_DMA_DESC_NUM_GENERIC - 1)) + hs_ep->compl_desc = 0; + desc_sts = hs_ep->desc_list[hs_ep->compl_desc].status; + } } /* - * dwc2_gadget_start_next_isoc_ddma - start next isoc request, if any. - * @hs_ep: The isochronous endpoint to be re-enabled. + * dwc2_gadget_handle_isoc_bna - handle BNA interrupt for ISOC. + * @hs_ep: The isochronous endpoint. * - * If ep has been disabled due to last descriptor servicing (IN endpoint) or - * BNA (OUT endpoint) check the status of other half of descriptor chain that - * was under SW control till HW was busy and restart the endpoint if needed. + * If EP ISOC OUT then need to flush RX FIFO to remove source of BNA + * interrupt. Reset target frame and next_desc to allow to start + * ISOC's on NAK interrupt for IN direction or on OUTTKNEPDIS + * interrupt for OUT direction. */ -static void dwc2_gadget_start_next_isoc_ddma(struct dwc2_hsotg_ep *hs_ep) +static void dwc2_gadget_handle_isoc_bna(struct dwc2_hsotg_ep *hs_ep) { struct dwc2_hsotg *hsotg = hs_ep->parent; - u32 depctl; - u32 dma_reg; - u32 ctrl; - u32 dma_addr = hs_ep->desc_list_dma; - unsigned char index = hs_ep->index; - - dma_reg = hs_ep->dir_in ? DIEPDMA(index) : DOEPDMA(index); - depctl = hs_ep->dir_in ? DIEPCTL(index) : DOEPCTL(index); - ctrl = dwc2_readl(hsotg->regs + depctl); - - /* - * EP was disabled if HW has processed last descriptor or BNA was set. - * So restart ep if SW has prepared new descriptor chain in ep_queue - * routine while HW was busy. - */ - if (!(ctrl & DXEPCTL_EPENA)) { - if (!hs_ep->next_desc) { - dev_dbg(hsotg->dev, "%s: No more ISOC requests\n", - __func__); - return; - } + if (!hs_ep->dir_in) + dwc2_flush_rx_fifo(hsotg); + dwc2_hsotg_complete_request(hsotg, hs_ep, get_ep_head(hs_ep), 0); - dma_addr += sizeof(struct dwc2_dma_desc) * - (MAX_DMA_DESC_NUM_GENERIC / 2) * - hs_ep->isoc_chain_num; - dwc2_writel(dma_addr, hsotg->regs + dma_reg); - - ctrl |= DXEPCTL_EPENA | DXEPCTL_CNAK; - dwc2_writel(ctrl, hsotg->regs + depctl); - - /* Switch ISOC descriptor chain number being processed by SW*/ - hs_ep->isoc_chain_num = (hs_ep->isoc_chain_num ^ 1) & 0x1; - hs_ep->next_desc = 0; - - dev_dbg(hsotg->dev, "%s: Restarted isochronous endpoint\n", - __func__); - } + hs_ep->target_frame = TARGET_FRAME_INITIAL; + hs_ep->next_desc = 0; + hs_ep->compl_desc = 0; } /** @@ -2763,7 +2739,7 @@ static void dwc2_gadget_handle_out_token_ep_disabled(struct dwc2_hsotg_ep *ep) */ tmp = dwc2_hsotg_read_frameno(hsotg); - dwc2_hsotg_complete_request(hsotg, ep, get_ep_head(ep), -ENODATA); + dwc2_hsotg_complete_request(hsotg, ep, get_ep_head(ep), 0); if (using_desc_dma(hsotg)) { if (ep->target_frame == TARGET_FRAME_INITIAL) { @@ -2816,18 +2792,25 @@ static void dwc2_gadget_handle_nak(struct dwc2_hsotg_ep *hs_ep) { struct dwc2_hsotg *hsotg = hs_ep->parent; int dir_in = hs_ep->dir_in; + u32 tmp; if (!dir_in || !hs_ep->isochronous) return; if (hs_ep->target_frame == TARGET_FRAME_INITIAL) { - hs_ep->target_frame = dwc2_hsotg_read_frameno(hsotg); + tmp = dwc2_hsotg_read_frameno(hsotg); if (using_desc_dma(hsotg)) { + dwc2_hsotg_complete_request(hsotg, hs_ep, + get_ep_head(hs_ep), 0); + + hs_ep->target_frame = tmp; + dwc2_gadget_incr_frame_num(hs_ep); dwc2_gadget_start_isoc_ddma(hs_ep); return; } + hs_ep->target_frame = tmp; if (hs_ep->interval > 1) { u32 ctrl = dwc2_readl(hsotg->regs + DIEPCTL(hs_ep->index)); @@ -2843,7 +2826,8 @@ static void dwc2_gadget_handle_nak(struct dwc2_hsotg_ep *hs_ep) get_ep_head(hs_ep), 0); } - dwc2_gadget_incr_frame_num(hs_ep); + if (!using_desc_dma(hsotg)) + dwc2_gadget_incr_frame_num(hs_ep); } /** @@ -2901,9 +2885,9 @@ static void dwc2_hsotg_epint(struct dwc2_hsotg *hsotg, unsigned int idx, /* In DDMA handle isochronous requests separately */ if (using_desc_dma(hsotg) && hs_ep->isochronous) { - dwc2_gadget_complete_isoc_request_ddma(hs_ep); - /* Try to start next isoc request */ - dwc2_gadget_start_next_isoc_ddma(hs_ep); + /* XferCompl set along with BNA */ + if (!(ints & DXEPINT_BNAINTR)) + dwc2_gadget_complete_isoc_request_ddma(hs_ep); } else if (dir_in) { /* * We get OutDone from the FIFO, so we only @@ -2978,15 +2962,8 @@ static void dwc2_hsotg_epint(struct dwc2_hsotg *hsotg, unsigned int idx, if (ints & DXEPINT_BNAINTR) { dev_dbg(hsotg->dev, "%s: BNA interrupt\n", __func__); - - /* - * Try to start next isoc request, if any. - * Sometimes the endpoint remains enabled after BNA interrupt - * assertion, which is not expected, hence we can enter here - * couple of times. - */ if (hs_ep->isochronous) - dwc2_gadget_start_next_isoc_ddma(hs_ep); + dwc2_gadget_handle_isoc_bna(hs_ep); } if (dir_in && !hs_ep->isochronous) { @@ -3789,6 +3766,7 @@ static int dwc2_hsotg_ep_enable(struct usb_ep *ep, unsigned int dir_in; unsigned int i, val, size; int ret = 0; + unsigned char ep_type; dev_dbg(hsotg->dev, "%s: ep %s: a 0x%02x, attr 0x%02x, mps 0x%04x, intr %d\n", @@ -3807,9 +3785,26 @@ static int dwc2_hsotg_ep_enable(struct usb_ep *ep, return -EINVAL; } + ep_type = desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK; mps = usb_endpoint_maxp(desc); mc = usb_endpoint_maxp_mult(desc); + /* ISOC IN in DDMA supported bInterval up to 10 */ + if (using_desc_dma(hsotg) && ep_type == USB_ENDPOINT_XFER_ISOC && + dir_in && desc->bInterval > 10) { + dev_err(hsotg->dev, + "%s: ISOC IN, DDMA: bInterval>10 not supported!\n", __func__); + return -EINVAL; + } + + /* High bandwidth ISOC OUT in DDMA not supported */ + if (using_desc_dma(hsotg) && ep_type == USB_ENDPOINT_XFER_ISOC && + !dir_in && mc > 1) { + dev_err(hsotg->dev, + "%s: ISOC OUT, DDMA: HB not supported!\n", __func__); + return -EINVAL; + } + /* note, we handle this here instead of dwc2_hsotg_set_ep_maxpacket */ epctrl_reg = dir_in ? DIEPCTL(index) : DOEPCTL(index); @@ -3850,15 +3845,15 @@ static int dwc2_hsotg_ep_enable(struct usb_ep *ep, hs_ep->halted = 0; hs_ep->interval = desc->bInterval; - switch (desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) { + switch (ep_type) { case USB_ENDPOINT_XFER_ISOC: epctrl |= DXEPCTL_EPTYPE_ISO; epctrl |= DXEPCTL_SETEVENFR; hs_ep->isochronous = 1; hs_ep->interval = 1 << (desc->bInterval - 1); hs_ep->target_frame = TARGET_FRAME_INITIAL; - hs_ep->isoc_chain_num = 0; hs_ep->next_desc = 0; + hs_ep->compl_desc = 0; if (dir_in) { hs_ep->periodic = 1; mask = dwc2_readl(hsotg->regs + DIEPMSK); -- cgit v1.1 From 37981e00503f6bdeb99108ff90199002c3eec2f5 Mon Sep 17 00:00:00 2001 From: Minas Harutyunyan Date: Thu, 3 May 2018 17:25:37 +0400 Subject: usb: dwc2: Enable BNA interrupt for IN endpoints In DDMA mode required to enable BNA interrupt for both directions. Signed-off-by: Minas Harutyunyan Signed-off-by: Felipe Balbi --- drivers/usb/dwc2/gadget.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) (limited to 'drivers/usb') diff --git a/drivers/usb/dwc2/gadget.c b/drivers/usb/dwc2/gadget.c index ec88f7e..403e990 100644 --- a/drivers/usb/dwc2/gadget.c +++ b/drivers/usb/dwc2/gadget.c @@ -3297,8 +3297,10 @@ void dwc2_hsotg_core_init_disconnected(struct dwc2_hsotg *hsotg, hsotg->regs + DOEPMSK); /* Enable BNA interrupt for DDMA */ - if (using_desc_dma(hsotg)) + if (using_desc_dma(hsotg)) { dwc2_set_bit(hsotg->regs + DOEPMSK, DOEPMSK_BNAMSK); + dwc2_set_bit(hsotg->regs + DIEPMSK, DIEPMSK_BNAININTRMSK); + } dwc2_writel(0, hsotg->regs + DAINTMSK); -- cgit v1.1 From b43ebc96e985fed9417c6aff769a6839bdaa6cdf Mon Sep 17 00:00:00 2001 From: Grigor Tovmasyan Date: Sat, 5 May 2018 12:17:58 +0400 Subject: usb: dwc2: Add Interpacket Gap(IPG) feature support Added GHWCFG4_IPG_ISOC_SUPPORTED and DCFG_IPG_ISOC_SUPPORDED bits definitions to enable/disable IPG feature. Added ipg_isoc_en core parameter which will indicate IPG support enable/disable and initialize it. Signed-off-by: Grigor Tovmasyan Signed-off-by: Felipe Balbi --- drivers/usb/dwc2/core.h | 11 +++++++++++ drivers/usb/dwc2/debugfs.c | 1 + drivers/usb/dwc2/gadget.c | 3 +++ drivers/usb/dwc2/hw.h | 2 ++ drivers/usb/dwc2/params.c | 3 +++ 5 files changed, 20 insertions(+) (limited to 'drivers/usb') diff --git a/drivers/usb/dwc2/core.h b/drivers/usb/dwc2/core.h index 274bf0a..e75a417 100644 --- a/drivers/usb/dwc2/core.h +++ b/drivers/usb/dwc2/core.h @@ -380,6 +380,9 @@ enum dwc2_ep0_state { * is FS. * 0 - No (default) * 1 - Yes + * @ipg_isoc_en Indicates the IPG supports is enabled or disabled. + * 0 - Disable (default) + * 1 - Enable * @ulpi_fs_ls: Make ULPI phy operate in FS/LS mode only * 0 - No (default) * 1 - Yes @@ -511,6 +514,7 @@ struct dwc2_core_params { bool hird_threshold_en; u8 hird_threshold; bool activate_stm_fs_transceiver; + bool ipg_isoc_en; u16 max_packet_count; u32 max_transfer_size; u32 ahbcfg; @@ -560,6 +564,12 @@ struct dwc2_core_params { * 0 - Slave only * 1 - External DMA * 2 - Internal DMA + * @ipg_isoc_en This feature indicates that the controller supports + * the worst-case scenario of Rx followed by Rx + * Interpacket Gap (IPG) (32 bitTimes) as per the utmi + * specification for any token following ISOC OUT token. + * 0 - Don't support + * 1 - Support * @power_optimized Are power optimizations enabled? * @num_dev_ep Number of device endpoints available * @num_dev_in_eps Number of device IN endpoints available @@ -622,6 +632,7 @@ struct dwc2_hw_params { unsigned hibernation:1; unsigned utmi_phy_data_width:2; unsigned lpm_mode:1; + unsigned ipg_isoc_en:1; u32 snpsid; u32 dev_ep_dirs; u32 g_tx_fifo_size[MAX_EPS_CHANNELS]; diff --git a/drivers/usb/dwc2/debugfs.c b/drivers/usb/dwc2/debugfs.c index 58c691f..5897333 100644 --- a/drivers/usb/dwc2/debugfs.c +++ b/drivers/usb/dwc2/debugfs.c @@ -710,6 +710,7 @@ static int params_show(struct seq_file *seq, void *v) print_param(seq, p, phy_ulpi_ddr); print_param(seq, p, phy_ulpi_ext_vbus); print_param(seq, p, i2c_enable); + print_param(seq, p, ipg_isoc_en); print_param(seq, p, ulpi_fs_ls); print_param(seq, p, host_support_fs_ls_low_power); print_param(seq, p, host_ls_low_power_phy_clk); diff --git a/drivers/usb/dwc2/gadget.c b/drivers/usb/dwc2/gadget.c index 403e990..abd22b4 100644 --- a/drivers/usb/dwc2/gadget.c +++ b/drivers/usb/dwc2/gadget.c @@ -3236,6 +3236,9 @@ void dwc2_hsotg_core_init_disconnected(struct dwc2_hsotg *hsotg, dcfg |= DCFG_DEVSPD_HS; } + if (hsotg->params.ipg_isoc_en) + dcfg |= DCFG_IPG_ISOC_SUPPORDED; + dwc2_writel(dcfg, hsotg->regs + DCFG); /* Clear any pending OTG interrupts */ diff --git a/drivers/usb/dwc2/hw.h b/drivers/usb/dwc2/hw.h index 38391e4..0ca8e7b 100644 --- a/drivers/usb/dwc2/hw.h +++ b/drivers/usb/dwc2/hw.h @@ -311,6 +311,7 @@ #define GHWCFG4_UTMI_PHY_DATA_WIDTH_MASK (0x3 << 14) #define GHWCFG4_UTMI_PHY_DATA_WIDTH_SHIFT 14 #define GHWCFG4_ACG_SUPPORTED BIT(12) +#define GHWCFG4_IPG_ISOC_SUPPORTED BIT(11) #define GHWCFG4_UTMI_PHY_DATA_WIDTH_8 0 #define GHWCFG4_UTMI_PHY_DATA_WIDTH_16 1 #define GHWCFG4_UTMI_PHY_DATA_WIDTH_8_OR_16 2 @@ -424,6 +425,7 @@ #define DCFG_EPMISCNT_SHIFT 18 #define DCFG_EPMISCNT_LIMIT 0x1f #define DCFG_EPMISCNT(_x) ((_x) << 18) +#define DCFG_IPG_ISOC_SUPPORDED BIT(17) #define DCFG_PERFRINT_MASK (0x3 << 11) #define DCFG_PERFRINT_SHIFT 11 #define DCFG_PERFRINT_LIMIT 0x3 diff --git a/drivers/usb/dwc2/params.c b/drivers/usb/dwc2/params.c index f03e418..2700f52 100644 --- a/drivers/usb/dwc2/params.c +++ b/drivers/usb/dwc2/params.c @@ -298,6 +298,7 @@ static void dwc2_set_default_params(struct dwc2_hsotg *hsotg) p->besl = true; p->hird_threshold_en = true; p->hird_threshold = 4; + p->ipg_isoc_en = false; p->max_packet_count = hw->max_packet_count; p->max_transfer_size = hw->max_transfer_size; p->ahbcfg = GAHBCFG_HBSTLEN_INCR << GAHBCFG_HBSTLEN_SHIFT; @@ -579,6 +580,7 @@ static void dwc2_check_params(struct dwc2_hsotg *hsotg) CHECK_BOOL(enable_dynamic_fifo, hw->enable_dynamic_fifo); CHECK_BOOL(en_multiple_tx_fifo, hw->en_multiple_tx_fifo); CHECK_BOOL(i2c_enable, hw->i2c_enable); + CHECK_BOOL(ipg_isoc_en, hw->ipg_isoc_en); CHECK_BOOL(acg_enable, hw->acg_enable); CHECK_BOOL(reload_ctl, (hsotg->hw_params.snpsid > DWC2_CORE_REV_2_92a)); CHECK_BOOL(lpm, (hsotg->hw_params.snpsid >= DWC2_CORE_REV_2_80a)); @@ -772,6 +774,7 @@ int dwc2_get_hwparams(struct dwc2_hsotg *hsotg) hw->utmi_phy_data_width = (hwcfg4 & GHWCFG4_UTMI_PHY_DATA_WIDTH_MASK) >> GHWCFG4_UTMI_PHY_DATA_WIDTH_SHIFT; hw->acg_enable = !!(hwcfg4 & GHWCFG4_ACG_SUPPORTED); + hw->ipg_isoc_en = !!(hwcfg4 & GHWCFG4_IPG_ISOC_SUPPORTED); /* fifo sizes */ hw->rx_fifo_size = (grxfsiz & GRXFSIZ_DEPTH_MASK) >> -- cgit v1.1 From d5d5f079138254e4d641de2f36760d0d0fc9f510 Mon Sep 17 00:00:00 2001 From: Artur Petrosyan Date: Sat, 5 May 2018 04:30:16 -0400 Subject: usb: dwc2: Fix crash in incomplete isoc intr handlers. Crash caused by going out of "eps_out" array range. Iteration on "eps_out" changed to less than "num_of_eps". Signed-off-by: Artur Petrosyan Signed-off-by: Felipe Balbi --- drivers/usb/dwc2/gadget.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) (limited to 'drivers/usb') diff --git a/drivers/usb/dwc2/gadget.c b/drivers/usb/dwc2/gadget.c index abd22b4..37ee467 100644 --- a/drivers/usb/dwc2/gadget.c +++ b/drivers/usb/dwc2/gadget.c @@ -3409,7 +3409,7 @@ static void dwc2_gadget_handle_incomplete_isoc_in(struct dwc2_hsotg *hsotg) daintmsk = dwc2_readl(hsotg->regs + DAINTMSK); - for (idx = 1; idx <= hsotg->num_of_eps; idx++) { + for (idx = 1; idx < hsotg->num_of_eps; idx++) { hs_ep = hsotg->eps_in[idx]; /* Proceed only unmasked ISOC EPs */ if (!hs_ep->isochronous || (BIT(idx) & ~daintmsk)) @@ -3455,7 +3455,7 @@ static void dwc2_gadget_handle_incomplete_isoc_out(struct dwc2_hsotg *hsotg) daintmsk = dwc2_readl(hsotg->regs + DAINTMSK); daintmsk >>= DAINT_OUTEP_SHIFT; - for (idx = 1; idx <= hsotg->num_of_eps; idx++) { + for (idx = 1; idx < hsotg->num_of_eps; idx++) { hs_ep = hsotg->eps_out[idx]; /* Proceed only unmasked ISOC EPs */ if (!hs_ep->isochronous || (BIT(idx) & ~daintmsk)) @@ -3629,7 +3629,7 @@ irq_retry: dwc2_writel(gintmsk, hsotg->regs + GINTMSK); dev_dbg(hsotg->dev, "GOUTNakEff triggered\n"); - for (idx = 1; idx <= hsotg->num_of_eps; idx++) { + for (idx = 1; idx < hsotg->num_of_eps; idx++) { hs_ep = hsotg->eps_out[idx]; /* Proceed only unmasked ISOC EPs */ if (!hs_ep->isochronous || (BIT(idx) & ~daintmsk)) -- cgit v1.1 From 971b750d31079e13c18e4ac335804401cfeb189d Mon Sep 17 00:00:00 2001 From: Stefan Wahren Date: Fri, 4 May 2018 20:09:05 +0200 Subject: usb: dwc2: debugfs: Don't touch RX FIFO during register dump Dumping the registers via debugfs makes USB on Raspberry Pi completely unusable. The read of register GRXSTSP ("Receive Status Read and Pop Register") is responsible for this behaviour, because it pops the RX FIFO. So avoid this by omitting the relevant register. CC: Mian Yousaf Kaukab Fixes: 563cf017c443 ("usb: dwc2: debugfs: add support for complete register dump") Acked-by: Minas Harutyunyan Signed-off-by: Stefan Wahren Signed-off-by: Felipe Balbi --- drivers/usb/dwc2/debugfs.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers/usb') diff --git a/drivers/usb/dwc2/debugfs.c b/drivers/usb/dwc2/debugfs.c index 5897333..a21f893 100644 --- a/drivers/usb/dwc2/debugfs.c +++ b/drivers/usb/dwc2/debugfs.c @@ -368,7 +368,7 @@ static const struct debugfs_reg32 dwc2_regs[] = { dump_register(GINTSTS), dump_register(GINTMSK), dump_register(GRXSTSR), - dump_register(GRXSTSP), + /* Omit GRXSTSP */ dump_register(GRXFSIZ), dump_register(GNPTXFSIZ), dump_register(GNPTXSTS), -- cgit v1.1 From c7c24e7a047652c558e7aa4b0f54aae3a61aacc4 Mon Sep 17 00:00:00 2001 From: Artur Petrosyan Date: Sat, 5 May 2018 09:46:26 -0400 Subject: usb: dwc2: Change reading of current frame number flow. The current frame_number is read from core for both device and host modes. Reading of the current frame number needs to be performed ASAP due to IRQ latency's. This is why, it is moved to common interrupt handler. Accordingly updated dwc2_gadget_target_frame_elapsed() function which uses stored frame_number instead of reading frame number. In cases when target frame value is incremented the frame_number is required to read again. Signed-off-by: Artur Petrosyan Signed-off-by: Felipe Balbi --- drivers/usb/dwc2/core.h | 7 ++++--- drivers/usb/dwc2/core_intr.c | 8 ++++++++ drivers/usb/dwc2/gadget.c | 13 +++++++++++-- 3 files changed, 23 insertions(+), 5 deletions(-) (limited to 'drivers/usb') diff --git a/drivers/usb/dwc2/core.h b/drivers/usb/dwc2/core.h index e75a417..2438480 100644 --- a/drivers/usb/dwc2/core.h +++ b/drivers/usb/dwc2/core.h @@ -824,6 +824,9 @@ struct dwc2_hregs_backup { * @gadget_enabled Peripheral mode sub-driver initialization indicator. * @ll_hw_enabled Status of low-level hardware resources. * @hibernated: True if core is hibernated + * @frame_number: Frame number read from the core. For both device + * and host modes. The value ranges are from 0 + * to HFNUM_MAX_FRNUM. * @phy: The otg phy transceiver structure for phy control. * @uphy: The otg phy transceiver structure for old USB phy * control. @@ -897,8 +900,6 @@ struct dwc2_hregs_backup { * @hs_periodic_bitmap: Bitmap used by the microframe scheduler any time the * host is in high speed mode; low speed schedules are * stored elsewhere since we need one per TT. - * @frame_number: Frame number read from the core at SOF. The value ranges - * from 0 to HFNUM_MAX_FRNUM. * @periodic_qh_count: Count of periodic QHs, if using several eps. Used for * SOF enable/disable. * @free_hc_list: Free host channels in the controller. This is a list of @@ -965,6 +966,7 @@ struct dwc2_hsotg { unsigned int gadget_enabled:1; unsigned int ll_hw_enabled:1; unsigned int hibernated:1; + u16 frame_number; struct phy *phy; struct usb_phy *uphy; @@ -1038,7 +1040,6 @@ struct dwc2_hsotg { u16 periodic_usecs; unsigned long hs_periodic_bitmap[ DIV_ROUND_UP(DWC2_HS_SCHEDULE_US, BITS_PER_LONG)]; - u16 frame_number; u16 periodic_qh_count; bool bus_suspended; bool new_connection; diff --git a/drivers/usb/dwc2/core_intr.c b/drivers/usb/dwc2/core_intr.c index 2982a15..cc90b58 100644 --- a/drivers/usb/dwc2/core_intr.c +++ b/drivers/usb/dwc2/core_intr.c @@ -778,6 +778,14 @@ irqreturn_t dwc2_handle_common_intr(int irq, void *dev) goto out; } + /* Reading current frame number value in device or host modes. */ + if (dwc2_is_device_mode(hsotg)) + hsotg->frame_number = (dwc2_readl(hsotg->regs + DSTS) + & DSTS_SOFFN_MASK) >> DSTS_SOFFN_SHIFT; + else + hsotg->frame_number = (dwc2_readl(hsotg->regs + HFNUM) + & HFNUM_FRNUM_MASK) >> HFNUM_FRNUM_SHIFT; + gintsts = dwc2_read_common_intr(hsotg); if (gintsts & ~GINTSTS_PRTINT) retval = IRQ_HANDLED; diff --git a/drivers/usb/dwc2/gadget.c b/drivers/usb/dwc2/gadget.c index 37ee467..e64a6dc 100644 --- a/drivers/usb/dwc2/gadget.c +++ b/drivers/usb/dwc2/gadget.c @@ -1225,7 +1225,7 @@ static bool dwc2_gadget_target_frame_elapsed(struct dwc2_hsotg_ep *hs_ep) { struct dwc2_hsotg *hsotg = hs_ep->parent; u32 target_frame = hs_ep->target_frame; - u32 current_frame = dwc2_hsotg_read_frameno(hsotg); + u32 current_frame = hsotg->frame_number; bool frame_overrun = hs_ep->frame_overrun; if (!frame_overrun && current_frame >= target_frame) @@ -1359,8 +1359,15 @@ static int dwc2_hsotg_ep_queue(struct usb_ep *ep, struct usb_request *req, return 0; } - while (dwc2_gadget_target_frame_elapsed(hs_ep)) + /* Update current frame number value. */ + hs->frame_number = dwc2_hsotg_read_frameno(hs); + while (dwc2_gadget_target_frame_elapsed(hs_ep)) { dwc2_gadget_incr_frame_num(hs_ep); + /* Update current frame number value once more as it + * changes here. + */ + hs->frame_number = dwc2_hsotg_read_frameno(hs); + } if (hs_ep->target_frame != TARGET_FRAME_INITIAL) dwc2_hsotg_start_req(hs, hs_ep, hs_req, false); @@ -2707,6 +2714,8 @@ static void dwc2_gadget_handle_ep_disabled(struct dwc2_hsotg_ep *hs_ep) dwc2_hsotg_complete_request(hsotg, hs_ep, hs_req, -ENODATA); dwc2_gadget_incr_frame_num(hs_ep); + /* Update current frame number value. */ + hsotg->frame_number = dwc2_hsotg_read_frameno(hsotg); } while (dwc2_gadget_target_frame_elapsed(hs_ep)); dwc2_gadget_start_next_request(hs_ep); -- cgit v1.1 From eea52743eb5654ec6f52b0e8b4aefec952543697 Mon Sep 17 00:00:00 2001 From: John Greb Date: Sun, 6 May 2018 20:01:57 +0000 Subject: USB: Gadget Ethernet: Re-enable Jumbo frames. Fixes: ("net: use core MTU range checking") which patched only one of two functions used to setup the USB Gadget Ethernet driver, causing a serious performance regression in the ability to increase mtu size above 1500. Signed-off-by: John Greb Signed-off-by: Felipe Balbi --- drivers/usb/gadget/function/u_ether.c | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'drivers/usb') diff --git a/drivers/usb/gadget/function/u_ether.c b/drivers/usb/gadget/function/u_ether.c index 6fcda62..1000d86 100644 --- a/drivers/usb/gadget/function/u_ether.c +++ b/drivers/usb/gadget/function/u_ether.c @@ -844,6 +844,10 @@ struct net_device *gether_setup_name_default(const char *netname) net->ethtool_ops = &ops; SET_NETDEV_DEVTYPE(net, &gadget_type); + /* MTU range: 14 - 15412 */ + net->min_mtu = ETH_HLEN; + net->max_mtu = GETHER_MAX_ETH_FRAME_LEN; + return net; } EXPORT_SYMBOL_GPL(gether_setup_name_default); -- cgit v1.1 From d3ac41bb330bea3a2929a70b8f4df20a0fa55d18 Mon Sep 17 00:00:00 2001 From: Lukasz Nowak Date: Mon, 7 May 2018 01:36:45 +0200 Subject: usb: gadget: f_ecm: fix host mac address for multiple instances In case there are multiple ecm instances, either for multiple otg controllers, or multiple virtual links using libcomposite, each instance needs to have its own host mac address string value for iMACAddress. Update the source array (ecm_string_defs), every time before usb_gstrings_attach(). Without that, all links wrongly were getting the same, last allocated, host mac address, rather than the correct one, as requested via configfs. Signed-off-by: Lukasz Nowak Signed-off-by: Felipe Balbi --- drivers/usb/gadget/function/f_ecm.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) (limited to 'drivers/usb') diff --git a/drivers/usb/gadget/function/f_ecm.c b/drivers/usb/gadget/function/f_ecm.c index b104ed0..6ce0440 100644 --- a/drivers/usb/gadget/function/f_ecm.c +++ b/drivers/usb/gadget/function/f_ecm.c @@ -705,6 +705,8 @@ ecm_bind(struct usb_configuration *c, struct usb_function *f) ecm_opts->bound = true; } + ecm_string_defs[1].s = ecm->ethaddr; + us = usb_gstrings_attach(cdev, ecm_strings, ARRAY_SIZE(ecm_string_defs)); if (IS_ERR(us)) @@ -928,7 +930,6 @@ static struct usb_function *ecm_alloc(struct usb_function_instance *fi) mutex_unlock(&opts->lock); return ERR_PTR(-EINVAL); } - ecm_string_defs[1].s = ecm->ethaddr; ecm->port.ioport = netdev_priv(opts->net); mutex_unlock(&opts->lock); -- cgit v1.1 From e362098f0e1202761f71a1764980d14a27187753 Mon Sep 17 00:00:00 2001 From: Icenowy Zheng Date: Mon, 7 May 2018 23:18:15 +0800 Subject: usb: dwc3: of-simple: Add compatible for Allwinner H6 platform Add compatible string to use this generic glue layer to support Allwinner H6 platform's dwc3 controller. Signed-off-by: Icenowy Zheng Signed-off-by: Felipe Balbi --- drivers/usb/dwc3/dwc3-of-simple.c | 1 + 1 file changed, 1 insertion(+) (limited to 'drivers/usb') diff --git a/drivers/usb/dwc3/dwc3-of-simple.c b/drivers/usb/dwc3/dwc3-of-simple.c index cb2ee96..a92a8e4 100644 --- a/drivers/usb/dwc3/dwc3-of-simple.c +++ b/drivers/usb/dwc3/dwc3-of-simple.c @@ -215,6 +215,7 @@ static const struct of_device_id of_dwc3_simple_match[] = { { .compatible = "sprd,sc9860-dwc3" }, { .compatible = "amlogic,meson-axg-dwc3" }, { .compatible = "amlogic,meson-gxl-dwc3" }, + { .compatible = "allwinner,sun50i-h6-dwc3" }, { /* Sentinel */ } }; MODULE_DEVICE_TABLE(of, of_dwc3_simple_match); -- cgit v1.1 From a4333c3a6ba9ca9cff50a3c1d1bf193dc5489e1c Mon Sep 17 00:00:00 2001 From: Manu Gautam Date: Wed, 9 May 2018 23:09:20 +0530 Subject: usb: dwc3: Add Qualcomm DWC3 glue driver DWC3 controller on Qualcomm SOCs has a Qscratch wrapper. Some of its uses are described below resulting in need to have a separate glue driver instead of using dwc3-of-simple: - It exposes register interface to override vbus-override and lane0-pwr-present signals going to hardware. These must be updated in peripheral mode for DWC3 if vbus lines are not connected to hardware block. Otherwise RX termination in SS mode or DP pull-up is not applied by device controller. - pwr_events_irq_stat support to check if USB2 PHY is in L2 state before glue driver proceeds with suspend. - Support for wakeup interrupts lines that are asserted whenever there is any wakeup event on USB3 or USB2 bus. - Support to replace pip3 clock going to DWC3 with utmi clock for hardware configuration where SSPHY is not used with DWC3. Signed-off-by: Manu Gautam Signed-off-by: Felipe Balbi --- drivers/usb/dwc3/Kconfig | 12 + drivers/usb/dwc3/Makefile | 1 + drivers/usb/dwc3/dwc3-of-simple.c | 1 - drivers/usb/dwc3/dwc3-qcom.c | 620 ++++++++++++++++++++++++++++++++++++++ 4 files changed, 633 insertions(+), 1 deletion(-) create mode 100644 drivers/usb/dwc3/dwc3-qcom.c (limited to 'drivers/usb') diff --git a/drivers/usb/dwc3/Kconfig b/drivers/usb/dwc3/Kconfig index ab8c0e0..451012e 100644 --- a/drivers/usb/dwc3/Kconfig +++ b/drivers/usb/dwc3/Kconfig @@ -106,4 +106,16 @@ config USB_DWC3_ST inside (i.e. STiH407). Say 'Y' or 'M' if you have one such device. +config USB_DWC3_QCOM + tristate "Qualcomm Platform" + depends on ARCH_QCOM || COMPILE_TEST + depends on OF + default USB_DWC3 + help + Some Qualcomm SoCs use DesignWare Core IP for USB2/3 + functionality. + This driver also handles Qscratch wrapper which is needed + for peripheral mode support. + Say 'Y' or 'M' if you have one such device. + endif diff --git a/drivers/usb/dwc3/Makefile b/drivers/usb/dwc3/Makefile index 025bc68..5c07d8f 100644 --- a/drivers/usb/dwc3/Makefile +++ b/drivers/usb/dwc3/Makefile @@ -48,3 +48,4 @@ obj-$(CONFIG_USB_DWC3_PCI) += dwc3-pci.o obj-$(CONFIG_USB_DWC3_KEYSTONE) += dwc3-keystone.o obj-$(CONFIG_USB_DWC3_OF_SIMPLE) += dwc3-of-simple.o obj-$(CONFIG_USB_DWC3_ST) += dwc3-st.o +obj-$(CONFIG_USB_DWC3_QCOM) += dwc3-qcom.o diff --git a/drivers/usb/dwc3/dwc3-of-simple.c b/drivers/usb/dwc3/dwc3-of-simple.c index a92a8e4..6b3ccd5 100644 --- a/drivers/usb/dwc3/dwc3-of-simple.c +++ b/drivers/usb/dwc3/dwc3-of-simple.c @@ -208,7 +208,6 @@ static const struct dev_pm_ops dwc3_of_simple_dev_pm_ops = { }; static const struct of_device_id of_dwc3_simple_match[] = { - { .compatible = "qcom,dwc3" }, { .compatible = "rockchip,rk3399-dwc3" }, { .compatible = "xlnx,zynqmp-dwc3" }, { .compatible = "cavium,octeon-7130-usb-uctl" }, diff --git a/drivers/usb/dwc3/dwc3-qcom.c b/drivers/usb/dwc3/dwc3-qcom.c new file mode 100644 index 0000000..8abb6f3 --- /dev/null +++ b/drivers/usb/dwc3/dwc3-qcom.c @@ -0,0 +1,620 @@ +// SPDX-License-Identifier: GPL-2.0 +/* Copyright (c) 2018, The Linux Foundation. All rights reserved. + * + * Inspired by dwc3-of-simple.c + */ +#define DEBUG + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include "core.h" + +/* USB QSCRATCH Hardware registers */ +#define QSCRATCH_HS_PHY_CTRL 0x10 +#define UTMI_OTG_VBUS_VALID BIT(20) +#define SW_SESSVLD_SEL BIT(28) + +#define QSCRATCH_SS_PHY_CTRL 0x30 +#define LANE0_PWR_PRESENT BIT(24) + +#define QSCRATCH_GENERAL_CFG 0x08 +#define PIPE_UTMI_CLK_SEL BIT(0) +#define PIPE3_PHYSTATUS_SW BIT(3) +#define PIPE_UTMI_CLK_DIS BIT(8) + +#define PWR_EVNT_IRQ_STAT_REG 0x58 +#define PWR_EVNT_LPM_IN_L2_MASK BIT(4) +#define PWR_EVNT_LPM_OUT_L2_MASK BIT(5) + +struct dwc3_qcom { + struct device *dev; + void __iomem *qscratch_base; + struct platform_device *dwc3; + struct clk **clks; + int num_clocks; + struct reset_control *resets; + + int hs_phy_irq; + int dp_hs_phy_irq; + int dm_hs_phy_irq; + int ss_phy_irq; + + struct extcon_dev *edev; + struct extcon_dev *host_edev; + struct notifier_block vbus_nb; + struct notifier_block host_nb; + + enum usb_dr_mode mode; + bool is_suspended; + bool pm_suspended; +}; + +static inline void dwc3_qcom_setbits(void __iomem *base, u32 offset, u32 val) +{ + u32 reg; + + reg = readl(base + offset); + reg |= val; + writel(reg, base + offset); + + /* ensure that above write is through */ + readl(base + offset); +} + +static inline void dwc3_qcom_clrbits(void __iomem *base, u32 offset, u32 val) +{ + u32 reg; + + reg = readl(base + offset); + reg &= ~val; + writel(reg, base + offset); + + /* ensure that above write is through */ + readl(base + offset); +} + +static void dwc3_qcom_vbus_overrride_enable(struct dwc3_qcom *qcom, bool enable) +{ + if (enable) { + dwc3_qcom_setbits(qcom->qscratch_base, QSCRATCH_SS_PHY_CTRL, + LANE0_PWR_PRESENT); + dwc3_qcom_setbits(qcom->qscratch_base, QSCRATCH_HS_PHY_CTRL, + UTMI_OTG_VBUS_VALID | SW_SESSVLD_SEL); + } else { + dwc3_qcom_clrbits(qcom->qscratch_base, QSCRATCH_SS_PHY_CTRL, + LANE0_PWR_PRESENT); + dwc3_qcom_clrbits(qcom->qscratch_base, QSCRATCH_HS_PHY_CTRL, + UTMI_OTG_VBUS_VALID | SW_SESSVLD_SEL); + } +} + +static int dwc3_qcom_vbus_notifier(struct notifier_block *nb, + unsigned long event, void *ptr) +{ + struct dwc3_qcom *qcom = container_of(nb, struct dwc3_qcom, vbus_nb); + + /* enable vbus override for device mode */ + dwc3_qcom_vbus_overrride_enable(qcom, event); + qcom->mode = event ? USB_DR_MODE_PERIPHERAL : USB_DR_MODE_HOST; + + return NOTIFY_DONE; +} + +static int dwc3_qcom_host_notifier(struct notifier_block *nb, + unsigned long event, void *ptr) +{ + struct dwc3_qcom *qcom = container_of(nb, struct dwc3_qcom, host_nb); + + /* disable vbus override in host mode */ + dwc3_qcom_vbus_overrride_enable(qcom, !event); + qcom->mode = event ? USB_DR_MODE_HOST : USB_DR_MODE_PERIPHERAL; + + return NOTIFY_DONE; +} + +static int dwc3_qcom_register_extcon(struct dwc3_qcom *qcom) +{ + struct device *dev = qcom->dev; + struct extcon_dev *host_edev; + int ret; + + if (!of_property_read_bool(dev->of_node, "extcon")) + return 0; + + qcom->edev = extcon_get_edev_by_phandle(dev, 0); + if (IS_ERR(qcom->edev)) + return PTR_ERR(qcom->edev); + + qcom->vbus_nb.notifier_call = dwc3_qcom_vbus_notifier; + + qcom->host_edev = extcon_get_edev_by_phandle(dev, 1); + if (IS_ERR(qcom->host_edev)) + qcom->host_edev = NULL; + + ret = devm_extcon_register_notifier(dev, qcom->edev, EXTCON_USB, + &qcom->vbus_nb); + if (ret < 0) { + dev_err(dev, "VBUS notifier register failed\n"); + return ret; + } + + if (qcom->host_edev) + host_edev = qcom->host_edev; + else + host_edev = qcom->edev; + + qcom->host_nb.notifier_call = dwc3_qcom_host_notifier; + ret = devm_extcon_register_notifier(dev, host_edev, EXTCON_USB_HOST, + &qcom->host_nb); + if (ret < 0) { + dev_err(dev, "Host notifier register failed\n"); + return ret; + } + + /* Update initial VBUS override based on extcon state */ + if (extcon_get_state(qcom->edev, EXTCON_USB) || + !extcon_get_state(host_edev, EXTCON_USB_HOST)) + dwc3_qcom_vbus_notifier(&qcom->vbus_nb, true, qcom->edev); + else + dwc3_qcom_vbus_notifier(&qcom->vbus_nb, false, qcom->edev); + + return 0; +} + +static void dwc3_qcom_disable_interrupts(struct dwc3_qcom *qcom) +{ + if (qcom->hs_phy_irq) { + disable_irq_wake(qcom->hs_phy_irq); + disable_irq_nosync(qcom->hs_phy_irq); + } + + if (qcom->dp_hs_phy_irq) { + disable_irq_wake(qcom->dp_hs_phy_irq); + disable_irq_nosync(qcom->dp_hs_phy_irq); + } + + if (qcom->dm_hs_phy_irq) { + disable_irq_wake(qcom->dm_hs_phy_irq); + disable_irq_nosync(qcom->dm_hs_phy_irq); + } + + if (qcom->ss_phy_irq) { + disable_irq_wake(qcom->ss_phy_irq); + disable_irq_nosync(qcom->ss_phy_irq); + } +} + +static void dwc3_qcom_enable_interrupts(struct dwc3_qcom *qcom) +{ + if (qcom->hs_phy_irq) { + enable_irq(qcom->hs_phy_irq); + enable_irq_wake(qcom->hs_phy_irq); + } + + if (qcom->dp_hs_phy_irq) { + enable_irq(qcom->dp_hs_phy_irq); + enable_irq_wake(qcom->dp_hs_phy_irq); + } + + if (qcom->dm_hs_phy_irq) { + enable_irq(qcom->dm_hs_phy_irq); + enable_irq_wake(qcom->dm_hs_phy_irq); + } + + if (qcom->ss_phy_irq) { + enable_irq(qcom->ss_phy_irq); + enable_irq_wake(qcom->ss_phy_irq); + } +} + +static int dwc3_qcom_suspend(struct dwc3_qcom *qcom) +{ + u32 val; + int i; + + if (qcom->is_suspended) + return 0; + + val = readl(qcom->qscratch_base + PWR_EVNT_IRQ_STAT_REG); + if (!(val & PWR_EVNT_LPM_IN_L2_MASK)) + dev_err(qcom->dev, "HS-PHY not in L2\n"); + + for (i = qcom->num_clocks - 1; i >= 0; i--) + clk_disable_unprepare(qcom->clks[i]); + + qcom->is_suspended = true; + dwc3_qcom_enable_interrupts(qcom); + + return 0; +} + +static int dwc3_qcom_resume(struct dwc3_qcom *qcom) +{ + int ret; + int i; + + if (!qcom->is_suspended) + return 0; + + dwc3_qcom_disable_interrupts(qcom); + + for (i = 0; i < qcom->num_clocks; i++) { + ret = clk_prepare_enable(qcom->clks[i]); + if (ret < 0) { + while (--i >= 0) + clk_disable_unprepare(qcom->clks[i]); + return ret; + } + } + + /* Clear existing events from PHY related to L2 in/out */ + dwc3_qcom_setbits(qcom->qscratch_base, PWR_EVNT_IRQ_STAT_REG, + PWR_EVNT_LPM_IN_L2_MASK | PWR_EVNT_LPM_OUT_L2_MASK); + + qcom->is_suspended = false; + + return 0; +} + +static irqreturn_t qcom_dwc3_resume_irq(int irq, void *data) +{ + struct dwc3_qcom *qcom = data; + struct dwc3 *dwc = platform_get_drvdata(qcom->dwc3); + + /* If pm_suspended then let pm_resume take care of resuming h/w */ + if (qcom->pm_suspended) + return IRQ_HANDLED; + + if (dwc->xhci) + pm_runtime_resume(&dwc->xhci->dev); + + return IRQ_HANDLED; +} + +static void dwc3_qcom_select_utmi_clk(struct dwc3_qcom *qcom) +{ + /* Configure dwc3 to use UTMI clock as PIPE clock not present */ + dwc3_qcom_setbits(qcom->qscratch_base, QSCRATCH_GENERAL_CFG, + PIPE_UTMI_CLK_DIS); + + usleep_range(100, 1000); + + dwc3_qcom_setbits(qcom->qscratch_base, QSCRATCH_GENERAL_CFG, + PIPE_UTMI_CLK_SEL | PIPE3_PHYSTATUS_SW); + + usleep_range(100, 1000); + + dwc3_qcom_clrbits(qcom->qscratch_base, QSCRATCH_GENERAL_CFG, + PIPE_UTMI_CLK_DIS); +} + +static int dwc3_qcom_setup_irq(struct platform_device *pdev) +{ + struct dwc3_qcom *qcom = platform_get_drvdata(pdev); + int irq, ret; + + irq = platform_get_irq_byname(pdev, "hs_phy_irq"); + if (irq > 0) { + /* Keep wakeup interrupts disabled until suspend */ + irq_set_status_flags(irq, IRQ_NOAUTOEN); + ret = devm_request_threaded_irq(qcom->dev, irq, NULL, + qcom_dwc3_resume_irq, + IRQF_TRIGGER_HIGH | IRQF_ONESHOT, + "qcom_dwc3 HS", qcom); + if (ret) { + dev_err(qcom->dev, "hs_phy_irq failed: %d\n", ret); + return ret; + } + qcom->hs_phy_irq = irq; + } + + irq = platform_get_irq_byname(pdev, "dp_hs_phy_irq"); + if (irq > 0) { + irq_set_status_flags(irq, IRQ_NOAUTOEN); + ret = devm_request_threaded_irq(qcom->dev, irq, NULL, + qcom_dwc3_resume_irq, + IRQF_TRIGGER_HIGH | IRQF_ONESHOT, + "qcom_dwc3 DP_HS", qcom); + if (ret) { + dev_err(qcom->dev, "dp_hs_phy_irq failed: %d\n", ret); + return ret; + } + qcom->dp_hs_phy_irq = irq; + } + + irq = platform_get_irq_byname(pdev, "dm_hs_phy_irq"); + if (irq > 0) { + irq_set_status_flags(irq, IRQ_NOAUTOEN); + ret = devm_request_threaded_irq(qcom->dev, irq, NULL, + qcom_dwc3_resume_irq, + IRQF_TRIGGER_HIGH | IRQF_ONESHOT, + "qcom_dwc3 DM_HS", qcom); + if (ret) { + dev_err(qcom->dev, "dm_hs_phy_irq failed: %d\n", ret); + return ret; + } + qcom->dm_hs_phy_irq = irq; + } + + irq = platform_get_irq_byname(pdev, "ss_phy_irq"); + if (irq > 0) { + irq_set_status_flags(irq, IRQ_NOAUTOEN); + ret = devm_request_threaded_irq(qcom->dev, irq, NULL, + qcom_dwc3_resume_irq, + IRQF_TRIGGER_HIGH | IRQF_ONESHOT, + "qcom_dwc3 SS", qcom); + if (ret) { + dev_err(qcom->dev, "ss_phy_irq failed: %d\n", ret); + return ret; + } + qcom->ss_phy_irq = irq; + } + + return 0; +} + +static int dwc3_qcom_clk_init(struct dwc3_qcom *qcom, int count) +{ + struct device *dev = qcom->dev; + struct device_node *np = dev->of_node; + int i; + + qcom->num_clocks = count; + + if (!count) + return 0; + + qcom->clks = devm_kcalloc(dev, qcom->num_clocks, + sizeof(struct clk *), GFP_KERNEL); + if (!qcom->clks) + return -ENOMEM; + + for (i = 0; i < qcom->num_clocks; i++) { + struct clk *clk; + int ret; + + clk = of_clk_get(np, i); + if (IS_ERR(clk)) { + while (--i >= 0) + clk_put(qcom->clks[i]); + return PTR_ERR(clk); + } + + ret = clk_prepare_enable(clk); + if (ret < 0) { + while (--i >= 0) { + clk_disable_unprepare(qcom->clks[i]); + clk_put(qcom->clks[i]); + } + clk_put(clk); + + return ret; + } + + qcom->clks[i] = clk; + } + + return 0; +} + +static int dwc3_qcom_probe(struct platform_device *pdev) +{ + struct device_node *np = pdev->dev.of_node, *dwc3_np; + struct device *dev = &pdev->dev; + struct dwc3_qcom *qcom; + struct resource *res; + int ret, i; + bool ignore_pipe_clk; + + qcom = devm_kzalloc(&pdev->dev, sizeof(*qcom), GFP_KERNEL); + if (!qcom) + return -ENOMEM; + + platform_set_drvdata(pdev, qcom); + qcom->dev = &pdev->dev; + + qcom->resets = devm_reset_control_array_get_optional_exclusive(dev); + if (IS_ERR(qcom->resets)) { + ret = PTR_ERR(qcom->resets); + dev_err(&pdev->dev, "failed to get resets, err=%d\n", ret); + return ret; + } + + ret = reset_control_assert(qcom->resets); + if (ret) { + dev_err(&pdev->dev, "failed to assert resets, err=%d\n", ret); + return ret; + } + + usleep_range(10, 1000); + + ret = reset_control_deassert(qcom->resets); + if (ret) { + dev_err(&pdev->dev, "failed to deassert resets, err=%d\n", ret); + goto reset_assert; + } + + ret = dwc3_qcom_clk_init(qcom, of_count_phandle_with_args(np, + "clocks", "#clock-cells")); + if (ret) { + dev_err(dev, "failed to get clocks\n"); + goto reset_assert; + } + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + qcom->qscratch_base = devm_ioremap_resource(dev, res); + if (IS_ERR(qcom->qscratch_base)) { + dev_err(dev, "failed to map qscratch, err=%d\n", ret); + ret = PTR_ERR(qcom->qscratch_base); + goto clk_disable; + } + + ret = dwc3_qcom_setup_irq(pdev); + if (ret) + goto clk_disable; + + dwc3_np = of_get_child_by_name(np, "dwc3"); + if (!dwc3_np) { + dev_err(dev, "failed to find dwc3 core child\n"); + ret = -ENODEV; + goto clk_disable; + } + + /* + * Disable pipe_clk requirement if specified. Used when dwc3 + * operates without SSPHY and only HS/FS/LS modes are supported. + */ + ignore_pipe_clk = device_property_read_bool(dev, + "qcom,select-utmi-as-pipe-clk"); + if (ignore_pipe_clk) + dwc3_qcom_select_utmi_clk(qcom); + + ret = of_platform_populate(np, NULL, NULL, dev); + if (ret) { + dev_err(dev, "failed to register dwc3 core - %d\n", ret); + goto clk_disable; + } + + qcom->dwc3 = of_find_device_by_node(dwc3_np); + if (!qcom->dwc3) { + dev_err(&pdev->dev, "failed to get dwc3 platform device\n"); + goto depopulate; + } + + qcom->mode = usb_get_dr_mode(&qcom->dwc3->dev); + + /* enable vbus override for device mode */ + if (qcom->mode == USB_DR_MODE_PERIPHERAL) + dwc3_qcom_vbus_overrride_enable(qcom, true); + + /* register extcon to override sw_vbus on Vbus change later */ + ret = dwc3_qcom_register_extcon(qcom); + if (ret) + goto depopulate; + + device_init_wakeup(&pdev->dev, 1); + qcom->is_suspended = false; + pm_runtime_set_active(dev); + pm_runtime_enable(dev); + pm_runtime_forbid(dev); + + return 0; + +depopulate: + of_platform_depopulate(&pdev->dev); +clk_disable: + for (i = qcom->num_clocks - 1; i >= 0; i--) { + clk_disable_unprepare(qcom->clks[i]); + clk_put(qcom->clks[i]); + } +reset_assert: + reset_control_assert(qcom->resets); + + return ret; +} + +static int dwc3_qcom_remove(struct platform_device *pdev) +{ + struct dwc3_qcom *qcom = platform_get_drvdata(pdev); + struct device *dev = &pdev->dev; + int i; + + of_platform_depopulate(dev); + + for (i = qcom->num_clocks - 1; i >= 0; i--) { + clk_disable_unprepare(qcom->clks[i]); + clk_put(qcom->clks[i]); + } + qcom->num_clocks = 0; + + reset_control_assert(qcom->resets); + + pm_runtime_allow(dev); + pm_runtime_disable(dev); + + return 0; +} + +#ifdef CONFIG_PM_SLEEP +static int dwc3_qcom_pm_suspend(struct device *dev) +{ + struct dwc3_qcom *qcom = dev_get_drvdata(dev); + int ret = 0; + + ret = dwc3_qcom_suspend(qcom); + if (!ret) + qcom->pm_suspended = true; + + return ret; +} + +static int dwc3_qcom_pm_resume(struct device *dev) +{ + struct dwc3_qcom *qcom = dev_get_drvdata(dev); + int ret; + + ret = dwc3_qcom_resume(qcom); + if (!ret) + qcom->pm_suspended = false; + + return ret; +} +#endif + +#ifdef CONFIG_PM +static int dwc3_qcom_runtime_suspend(struct device *dev) +{ + struct dwc3_qcom *qcom = dev_get_drvdata(dev); + + return dwc3_qcom_suspend(qcom); +} + +static int dwc3_qcom_runtime_resume(struct device *dev) +{ + struct dwc3_qcom *qcom = dev_get_drvdata(dev); + + return dwc3_qcom_resume(qcom); +} +#endif + +static const struct dev_pm_ops dwc3_qcom_dev_pm_ops = { + SET_SYSTEM_SLEEP_PM_OPS(dwc3_qcom_pm_suspend, dwc3_qcom_pm_resume) + SET_RUNTIME_PM_OPS(dwc3_qcom_runtime_suspend, dwc3_qcom_runtime_resume, + NULL) +}; + +static const struct of_device_id dwc3_qcom_of_match[] = { + { .compatible = "qcom,dwc3" }, + { .compatible = "qcom,msm8996-dwc3" }, + { .compatible = "qcom,sdm845-dwc3" }, + { } +}; +MODULE_DEVICE_TABLE(of, dwc3_qcom_of_match); + +static struct platform_driver dwc3_qcom_driver = { + .probe = dwc3_qcom_probe, + .remove = dwc3_qcom_remove, + .driver = { + .name = "dwc3-qcom", + .pm = &dwc3_qcom_dev_pm_ops, + .of_match_table = dwc3_qcom_of_match, + }, +}; + +module_platform_driver(dwc3_qcom_driver); + +MODULE_LICENSE("GPL v2"); +MODULE_DESCRIPTION("DesignWare DWC3 QCOM Glue Driver"); -- cgit v1.1 From bcb128777af5e93a0ef017e2416e12cebae715f9 Mon Sep 17 00:00:00 2001 From: Manu Gautam Date: Wed, 9 May 2018 23:09:21 +0530 Subject: usb: dwc3: core: Suspend PHYs on runtime suspend in host mode Some PHY drivers (e.g. for Qualcomm QUSB2 and QMP PHYs) support runtime PM to reduce PHY power consumption during bus_suspend. Add changes to let core auto-suspend PHYs on host bus-suspend using GUSB2PHYCFG register if needed for a platform. Also perform PHYs runtime suspend/resume and let platform glue drivers e.g. dwc3-qcom handle remote wakeup during bus suspend by waking up devices on receiving wakeup event from PHY. Signed-off-by: Manu Gautam Signed-off-by: Felipe Balbi --- drivers/usb/dwc3/core.c | 36 +++++++++++++++++++++++++++++++++--- 1 file changed, 33 insertions(+), 3 deletions(-) (limited to 'drivers/usb') diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c index a15648d..449a098 100644 --- a/drivers/usb/dwc3/core.c +++ b/drivers/usb/dwc3/core.c @@ -1394,6 +1394,7 @@ static int dwc3_remove(struct platform_device *pdev) static int dwc3_suspend_common(struct dwc3 *dwc, pm_message_t msg) { unsigned long flags; + u32 reg; switch (dwc->current_dr_role) { case DWC3_GCTL_PRTCAP_DEVICE: @@ -1403,9 +1404,25 @@ static int dwc3_suspend_common(struct dwc3 *dwc, pm_message_t msg) dwc3_core_exit(dwc); break; case DWC3_GCTL_PRTCAP_HOST: - /* do nothing during host runtime_suspend */ - if (!PMSG_IS_AUTO(msg)) + if (!PMSG_IS_AUTO(msg)) { dwc3_core_exit(dwc); + break; + } + + /* Let controller to suspend HSPHY before PHY driver suspends */ + if (dwc->dis_u2_susphy_quirk || + dwc->dis_enblslpm_quirk) { + reg = dwc3_readl(dwc->regs, DWC3_GUSB2PHYCFG(0)); + reg |= DWC3_GUSB2PHYCFG_ENBLSLPM | + DWC3_GUSB2PHYCFG_SUSPHY; + dwc3_writel(dwc->regs, DWC3_GUSB2PHYCFG(0), reg); + + /* Give some time for USB2 PHY to suspend */ + usleep_range(5000, 6000); + } + + phy_pm_runtime_put_sync(dwc->usb2_generic_phy); + phy_pm_runtime_put_sync(dwc->usb3_generic_phy); break; case DWC3_GCTL_PRTCAP_OTG: /* do nothing during runtime_suspend */ @@ -1433,6 +1450,7 @@ static int dwc3_resume_common(struct dwc3 *dwc, pm_message_t msg) { unsigned long flags; int ret; + u32 reg; switch (dwc->current_dr_role) { case DWC3_GCTL_PRTCAP_DEVICE: @@ -1446,13 +1464,25 @@ static int dwc3_resume_common(struct dwc3 *dwc, pm_message_t msg) spin_unlock_irqrestore(&dwc->lock, flags); break; case DWC3_GCTL_PRTCAP_HOST: - /* nothing to do on host runtime_resume */ if (!PMSG_IS_AUTO(msg)) { ret = dwc3_core_init(dwc); if (ret) return ret; dwc3_set_prtcap(dwc, DWC3_GCTL_PRTCAP_HOST); + break; } + /* Restore GUSB2PHYCFG bits that were modified in suspend */ + reg = dwc3_readl(dwc->regs, DWC3_GUSB2PHYCFG(0)); + if (dwc->dis_u2_susphy_quirk) + reg &= ~DWC3_GUSB2PHYCFG_SUSPHY; + + if (dwc->dis_enblslpm_quirk) + reg &= ~DWC3_GUSB2PHYCFG_ENBLSLPM; + + dwc3_writel(dwc->regs, DWC3_GUSB2PHYCFG(0), reg); + + phy_pm_runtime_get_sync(dwc->usb2_generic_phy); + phy_pm_runtime_get_sync(dwc->usb3_generic_phy); break; case DWC3_GCTL_PRTCAP_OTG: /* nothing to do on runtime_resume */ -- cgit v1.1 From 1ef6c42afc76d2e88a7972e2f59082305d9945bc Mon Sep 17 00:00:00 2001 From: Chunfeng Yun Date: Wed, 9 May 2018 19:29:16 +0800 Subject: usb: gadget: composite: fill bcdUSB as 0x0320 for SuperSpeed or higher speeds The USB3CV version 2.1.80 (March 26, 2018) requires all devices ( gen1, gen2, single lane, dual lane) to return the value of 0x0320 in the bcdUSB field Signed-off-by: Chunfeng Yun Signed-off-by: Felipe Balbi --- drivers/usb/gadget/composite.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers/usb') diff --git a/drivers/usb/gadget/composite.c b/drivers/usb/gadget/composite.c index 63a7cb8..f242c2b 100644 --- a/drivers/usb/gadget/composite.c +++ b/drivers/usb/gadget/composite.c @@ -1601,7 +1601,7 @@ composite_setup(struct usb_gadget *gadget, const struct usb_ctrlrequest *ctrl) cdev->gadget->ep0->maxpacket; if (gadget_is_superspeed(gadget)) { if (gadget->speed >= USB_SPEED_SUPER) { - cdev->desc.bcdUSB = cpu_to_le16(0x0310); + cdev->desc.bcdUSB = cpu_to_le16(0x0320); cdev->desc.bMaxPacketSize0 = 9; } else { cdev->desc.bcdUSB = cpu_to_le16(0x0210); -- cgit v1.1 From 44feb8e6ea2d3743d1d90dc5a05dc458dedd71d0 Mon Sep 17 00:00:00 2001 From: Masahiro Yamada Date: Thu, 19 Apr 2018 20:03:37 +0900 Subject: usb: dwc3: use local copy of resource to fix-up register offset It is not a good idea to directly modify the resource of a platform device. Modify its local copy, and pass it to devm_ioremap_resource() so that we do not need to restore it in the failure path and the remove hook. Signed-off-by: Masahiro Yamada Reviewed-by: Masami Hiramatsu Signed-off-by: Felipe Balbi --- drivers/usb/dwc3/core.c | 32 ++++++++------------------------ 1 file changed, 8 insertions(+), 24 deletions(-) (limited to 'drivers/usb') diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c index 449a098..25d7e9d 100644 --- a/drivers/usb/dwc3/core.c +++ b/drivers/usb/dwc3/core.c @@ -1245,7 +1245,7 @@ static void dwc3_check_params(struct dwc3 *dwc) static int dwc3_probe(struct platform_device *pdev) { struct device *dev = &pdev->dev; - struct resource *res; + struct resource *res, dwc_res; struct dwc3 *dwc; int ret; @@ -1270,20 +1270,19 @@ static int dwc3_probe(struct platform_device *pdev) dwc->xhci_resources[0].flags = res->flags; dwc->xhci_resources[0].name = res->name; - res->start += DWC3_GLOBALS_REGS_START; - /* * Request memory region but exclude xHCI regs, * since it will be requested by the xhci-plat driver. */ - regs = devm_ioremap_resource(dev, res); - if (IS_ERR(regs)) { - ret = PTR_ERR(regs); - goto err0; - } + dwc_res = *res; + dwc_res.start += DWC3_GLOBALS_REGS_START; + + regs = devm_ioremap_resource(dev, &dwc_res); + if (IS_ERR(regs)) + return PTR_ERR(regs); dwc->regs = regs; - dwc->regs_size = resource_size(res); + dwc->regs_size = resource_size(&dwc_res); dwc3_get_properties(dwc); @@ -1350,29 +1349,14 @@ err1: pm_runtime_put_sync(&pdev->dev); pm_runtime_disable(&pdev->dev); -err0: - /* - * restore res->start back to its original value so that, in case the - * probe is deferred, we don't end up getting error in request the - * memory region the next time probe is called. - */ - res->start -= DWC3_GLOBALS_REGS_START; - return ret; } static int dwc3_remove(struct platform_device *pdev) { struct dwc3 *dwc = platform_get_drvdata(pdev); - struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0); pm_runtime_get_sync(&pdev->dev); - /* - * restore res->start back to its original value so that, in case the - * probe is deferred, we don't end up getting error in request the - * memory region the next time probe is called. - */ - res->start -= DWC3_GLOBALS_REGS_START; dwc3_debugfs_exit(dwc); dwc3_core_exit_mode(dwc); -- cgit v1.1 From 1ca532e9916a277b0e87271e6b367a3774808035 Mon Sep 17 00:00:00 2001 From: Michel Pollet Date: Thu, 10 May 2018 14:09:09 +0100 Subject: USB: rndis: Fix for handling garbled messages A message can be forged to crash the stack; here we make sure we don't completely break the system if this occurs Signed-off-by: Michel Pollet Signed-off-by: Felipe Balbi --- drivers/usb/gadget/function/rndis.c | 3 +++ 1 file changed, 3 insertions(+) (limited to 'drivers/usb') diff --git a/drivers/usb/gadget/function/rndis.c b/drivers/usb/gadget/function/rndis.c index 51dd3e9..04c142c 100644 --- a/drivers/usb/gadget/function/rndis.c +++ b/drivers/usb/gadget/function/rndis.c @@ -851,6 +851,9 @@ int rndis_msg_parser(struct rndis_params *params, u8 *buf) */ pr_warn("%s: unknown RNDIS message 0x%08X len %d\n", __func__, MsgType, MsgLength); + /* Garbled message can be huge, so limit what we display */ + if (MsgLength > 16) + MsgLength = 16; print_hex_dump_bytes(__func__, DUMP_PREFIX_OFFSET, buf, MsgLength); break; -- cgit v1.1 From a3e20083bd7cdf6163923d9de2f4b62b2a0cbed4 Mon Sep 17 00:00:00 2001 From: Romain Izard Date: Fri, 11 May 2018 12:19:54 +0200 Subject: usb: gadget: udc: atmel: GPIO inversion is handled by gpiod When converting to GPIO descriptors, gpiod_get_value automatically handles the line inversion flags from the device tree. Do not invert the line twice. Fixes: 3df034081021 ("usb: gadget: udc: atmel: convert to use GPIO descriptors") Acked-by: Ludovic Desroches Acked-by: Nicolas Ferre Signed-off-by: Romain Izard Signed-off-by: Felipe Balbi --- drivers/usb/gadget/udc/atmel_usba_udc.c | 3 +-- drivers/usb/gadget/udc/atmel_usba_udc.h | 1 - 2 files changed, 1 insertion(+), 3 deletions(-) (limited to 'drivers/usb') diff --git a/drivers/usb/gadget/udc/atmel_usba_udc.c b/drivers/usb/gadget/udc/atmel_usba_udc.c index 27c1639..0fe3d0f 100644 --- a/drivers/usb/gadget/udc/atmel_usba_udc.c +++ b/drivers/usb/gadget/udc/atmel_usba_udc.c @@ -417,7 +417,7 @@ static inline void usba_int_enb_set(struct usba_udc *udc, u32 val) static int vbus_is_present(struct usba_udc *udc) { if (udc->vbus_pin) - return gpiod_get_value(udc->vbus_pin) ^ udc->vbus_pin_inverted; + return gpiod_get_value(udc->vbus_pin); /* No Vbus detection: Assume always present */ return 1; @@ -2076,7 +2076,6 @@ static struct usba_ep * atmel_udc_of_init(struct platform_device *pdev, udc->vbus_pin = devm_gpiod_get_optional(&pdev->dev, "atmel,vbus", GPIOD_IN); - udc->vbus_pin_inverted = gpiod_is_active_low(udc->vbus_pin); if (fifo_mode == 0) { pp = NULL; diff --git a/drivers/usb/gadget/udc/atmel_usba_udc.h b/drivers/usb/gadget/udc/atmel_usba_udc.h index 969ce8f..d7eb7cf 100644 --- a/drivers/usb/gadget/udc/atmel_usba_udc.h +++ b/drivers/usb/gadget/udc/atmel_usba_udc.h @@ -326,7 +326,6 @@ struct usba_udc { const struct usba_udc_errata *errata; int irq; struct gpio_desc *vbus_pin; - int vbus_pin_inverted; int num_ep; int configured_ep; struct usba_fifo_cfg *fifo_cfg; -- cgit v1.1 From 2f8519f6ed42cd332ec442e3b9edc0575bc4df48 Mon Sep 17 00:00:00 2001 From: Romain Izard Date: Fri, 11 May 2018 12:19:55 +0200 Subject: usb: gadget: udc: atmel: Remove obsolete include The include defines the private platform_data structure used with AVR platforms. It has no user since 7c55984e191f. Remove it. Acked-by: Ludovic Desroches Acked-by: Nicolas Ferre Signed-off-by: Romain Izard Signed-off-by: Felipe Balbi --- drivers/usb/gadget/udc/atmel_usba_udc.c | 1 - 1 file changed, 1 deletion(-) (limited to 'drivers/usb') diff --git a/drivers/usb/gadget/udc/atmel_usba_udc.c b/drivers/usb/gadget/udc/atmel_usba_udc.c index 0fe3d0f..b9623e2 100644 --- a/drivers/usb/gadget/udc/atmel_usba_udc.c +++ b/drivers/usb/gadget/udc/atmel_usba_udc.c @@ -20,7 +20,6 @@ #include #include #include -#include #include #include #include -- cgit v1.1 From 4d4ca0139c5a4f6c8b0570877e0326481198cac7 Mon Sep 17 00:00:00 2001 From: Romain Izard Date: Fri, 11 May 2018 12:19:56 +0200 Subject: usb: gadget: udc: atmel: Fix indenting Fix the fallout of the conversion to GPIO descriptors in 3df034081021. Acked-by: Ludovic Desroches Acked-by: Nicolas Ferre Signed-off-by: Romain Izard Signed-off-by: Felipe Balbi --- drivers/usb/gadget/udc/atmel_usba_udc.c | 18 +++++++++--------- 1 file changed, 9 insertions(+), 9 deletions(-) (limited to 'drivers/usb') diff --git a/drivers/usb/gadget/udc/atmel_usba_udc.c b/drivers/usb/gadget/udc/atmel_usba_udc.c index b9623e2..2f586f2 100644 --- a/drivers/usb/gadget/udc/atmel_usba_udc.c +++ b/drivers/usb/gadget/udc/atmel_usba_udc.c @@ -2277,15 +2277,15 @@ static int usba_udc_probe(struct platform_device *pdev) if (udc->vbus_pin) { irq_set_status_flags(gpiod_to_irq(udc->vbus_pin), IRQ_NOAUTOEN); ret = devm_request_threaded_irq(&pdev->dev, - gpiod_to_irq(udc->vbus_pin), NULL, - usba_vbus_irq_thread, USBA_VBUS_IRQFLAGS, - "atmel_usba_udc", udc); - if (ret) { - udc->vbus_pin = NULL; - dev_warn(&udc->pdev->dev, - "failed to request vbus irq; " - "assuming always on\n"); - } + gpiod_to_irq(udc->vbus_pin), NULL, + usba_vbus_irq_thread, USBA_VBUS_IRQFLAGS, + "atmel_usba_udc", udc); + if (ret) { + udc->vbus_pin = NULL; + dev_warn(&udc->pdev->dev, + "failed to request vbus irq; " + "assuming always on\n"); + } } ret = usb_add_gadget_udc(&pdev->dev, &udc->gadget); -- cgit v1.1 From fe8abf332b8f66868013cfcd6bfe727136a2ab5f Mon Sep 17 00:00:00 2001 From: Masahiro Yamada Date: Wed, 16 May 2018 11:41:07 +0900 Subject: usb: dwc3: support clocks and resets for DWC3 core Historically, the clocks and resets are handled on the glue layer side instead of the DWC3 core. For simple cases, dwc3-of-simple.c takes care of arbitrary number of clocks and resets. The DT node structure typically looks like as follows: dwc3-glue { compatible = "foo,dwc3"; clocks = ...; resets = ...; ... dwc3 { compatible = "snps,dwc3"; ... }; } By supporting the clocks and the reset in the dwc3/core.c, it will be turned into a single node: dwc3 { compatible = "foo,dwc3", "snps,dwc3"; clocks = ...; resets = ...; ... } This commit adds the binding of clocks and resets specific to this IP. The number of clocks should generally be the same across SoCs, it is just some SoCs either tie clocks together or do not provide software control of some of the clocks. I took the clock names from the Synopsys datasheet: "ref" (ref_clk), "bus_early" (bus_clk_early), and "suspend" (suspend_clk). I found only one reset line in the datasheet, hence the reset-names property is omitted. Those clocks are required for new platforms. Enforcing the new binding breaks existing platforms since they specify clocks (and resets) in their glue layer node, but nothing in the core node. I listed such exceptional cases in the DT binding. The driver code has been relaxed to accept no clock. This change is based on the discussion [1]. I inserted reset_control_deassert() and clk_bulk_enable() before the first register access, i.e. dwc3_cache_hwparams(). [1] https://patchwork.kernel.org/patch/10284265/ Signed-off-by: Masahiro Yamada Reviewed-by: Rob Herring Signed-off-by: Felipe Balbi --- drivers/usb/dwc3/core.c | 88 +++++++++++++++++++++++++++++++++++++++++++++++-- drivers/usb/dwc3/core.h | 8 +++++ 2 files changed, 94 insertions(+), 2 deletions(-) (limited to 'drivers/usb') diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c index 25d7e9d..ea91310 100644 --- a/drivers/usb/dwc3/core.c +++ b/drivers/usb/dwc3/core.c @@ -8,6 +8,7 @@ * Sebastian Andrzej Siewior */ +#include #include #include #include @@ -24,6 +25,7 @@ #include #include #include +#include #include #include @@ -266,6 +268,12 @@ done: return 0; } +static const struct clk_bulk_data dwc3_core_clks[] = { + { .id = "ref" }, + { .id = "bus_early" }, + { .id = "suspend" }, +}; + /* * dwc3_frame_length_adjustment - Adjusts frame length if required * @dwc3: Pointer to our controller context structure @@ -667,6 +675,9 @@ static void dwc3_core_exit(struct dwc3 *dwc) usb_phy_set_suspend(dwc->usb3_phy, 1); phy_power_off(dwc->usb2_generic_phy); phy_power_off(dwc->usb3_generic_phy); + clk_bulk_disable(dwc->num_clks, dwc->clks); + clk_bulk_unprepare(dwc->num_clks, dwc->clks); + reset_control_assert(dwc->reset); } static bool dwc3_core_is_valid(struct dwc3 *dwc) @@ -1256,6 +1267,12 @@ static int dwc3_probe(struct platform_device *pdev) if (!dwc) return -ENOMEM; + dwc->clks = devm_kmemdup(dev, dwc3_core_clks, sizeof(dwc3_core_clks), + GFP_KERNEL); + if (!dwc->clks) + return -ENOMEM; + + dwc->num_clks = ARRAY_SIZE(dwc3_core_clks); dwc->dev = dev; res = platform_get_resource(pdev, IORESOURCE_MEM, 0); @@ -1286,6 +1303,32 @@ static int dwc3_probe(struct platform_device *pdev) dwc3_get_properties(dwc); + dwc->reset = devm_reset_control_get_optional_shared(dev, NULL); + if (IS_ERR(dwc->reset)) + return PTR_ERR(dwc->reset); + + ret = clk_bulk_get(dev, dwc->num_clks, dwc->clks); + if (ret == -EPROBE_DEFER) + return ret; + /* + * Clocks are optional, but new DT platforms should support all clocks + * as required by the DT-binding. + */ + if (ret) + dwc->num_clks = 0; + + ret = reset_control_deassert(dwc->reset); + if (ret) + goto put_clks; + + ret = clk_bulk_prepare(dwc->num_clks, dwc->clks); + if (ret) + goto assert_reset; + + ret = clk_bulk_enable(dwc->num_clks, dwc->clks); + if (ret) + goto unprepare_clks; + platform_set_drvdata(pdev, dwc); dwc3_cache_hwparams(dwc); @@ -1349,6 +1392,14 @@ err1: pm_runtime_put_sync(&pdev->dev); pm_runtime_disable(&pdev->dev); + clk_bulk_disable(dwc->num_clks, dwc->clks); +unprepare_clks: + clk_bulk_unprepare(dwc->num_clks, dwc->clks); +assert_reset: + reset_control_assert(dwc->reset); +put_clks: + clk_bulk_put(dwc->num_clks, dwc->clks); + return ret; } @@ -1370,11 +1421,44 @@ static int dwc3_remove(struct platform_device *pdev) dwc3_free_event_buffers(dwc); dwc3_free_scratch_buffers(dwc); + clk_bulk_put(dwc->num_clks, dwc->clks); return 0; } #ifdef CONFIG_PM +static int dwc3_core_init_for_resume(struct dwc3 *dwc) +{ + int ret; + + ret = reset_control_deassert(dwc->reset); + if (ret) + return ret; + + ret = clk_bulk_prepare(dwc->num_clks, dwc->clks); + if (ret) + goto assert_reset; + + ret = clk_bulk_enable(dwc->num_clks, dwc->clks); + if (ret) + goto unprepare_clks; + + ret = dwc3_core_init(dwc); + if (ret) + goto disable_clks; + + return 0; + +disable_clks: + clk_bulk_disable(dwc->num_clks, dwc->clks); +unprepare_clks: + clk_bulk_unprepare(dwc->num_clks, dwc->clks); +assert_reset: + reset_control_assert(dwc->reset); + + return ret; +} + static int dwc3_suspend_common(struct dwc3 *dwc, pm_message_t msg) { unsigned long flags; @@ -1438,7 +1522,7 @@ static int dwc3_resume_common(struct dwc3 *dwc, pm_message_t msg) switch (dwc->current_dr_role) { case DWC3_GCTL_PRTCAP_DEVICE: - ret = dwc3_core_init(dwc); + ret = dwc3_core_init_for_resume(dwc); if (ret) return ret; @@ -1449,7 +1533,7 @@ static int dwc3_resume_common(struct dwc3 *dwc, pm_message_t msg) break; case DWC3_GCTL_PRTCAP_HOST: if (!PMSG_IS_AUTO(msg)) { - ret = dwc3_core_init(dwc); + ret = dwc3_core_init_for_resume(dwc); if (ret) return ret; dwc3_set_prtcap(dwc, DWC3_GCTL_PRTCAP_HOST); diff --git a/drivers/usb/dwc3/core.h b/drivers/usb/dwc3/core.h index 4f3b438..1765e01 100644 --- a/drivers/usb/dwc3/core.h +++ b/drivers/usb/dwc3/core.h @@ -891,6 +891,9 @@ struct dwc3_scratchpad_array { * @eps: endpoint array * @gadget: device side representation of the peripheral controller * @gadget_driver: pointer to the gadget driver + * @clks: array of clocks + * @num_clks: number of clocks + * @reset: reset control * @regs: base address for our registers * @regs_size: address space size * @fladj: frame length adjustment @@ -1013,6 +1016,11 @@ struct dwc3 { struct usb_gadget gadget; struct usb_gadget_driver *gadget_driver; + struct clk_bulk_data *clks; + int num_clks; + + struct reset_control *reset; + struct usb_phy *usb2_phy; struct usb_phy *usb3_phy; -- cgit v1.1 From 5f0b74e54890c354d6ac0124ea7a96adf22845d0 Mon Sep 17 00:00:00 2001 From: Andrzej Hajda Date: Tue, 15 May 2018 14:12:38 +0200 Subject: USB: dwc3: get extcon device by OF graph bindings extcon device is used to detect host/device connection. Since extcon OF property is deprecated, alternative method should be added. This method uses OF graph bindings to locate extcon. Signed-off-by: Andrzej Hajda Signed-off-by: Felipe Balbi --- drivers/usb/dwc3/drd.c | 34 ++++++++++++++++++++++++++++------ 1 file changed, 28 insertions(+), 6 deletions(-) (limited to 'drivers/usb') diff --git a/drivers/usb/dwc3/drd.c b/drivers/usb/dwc3/drd.c index 1d8c557..2706824 100644 --- a/drivers/usb/dwc3/drd.c +++ b/drivers/usb/dwc3/drd.c @@ -8,6 +8,7 @@ */ #include +#include #include #include "debug.h" @@ -439,17 +440,38 @@ static int dwc3_drd_notifier(struct notifier_block *nb, return NOTIFY_DONE; } +struct extcon_dev *dwc3_get_extcon(struct dwc3 *dwc) +{ + struct device *dev = dwc->dev; + struct device_node *np_phy, *np_conn; + struct extcon_dev *edev; + + if (of_property_read_bool(dev->of_node, "extcon")) + return extcon_get_edev_by_phandle(dwc->dev, 0); + + np_phy = of_parse_phandle(dev->of_node, "phys", 0); + np_conn = of_graph_get_remote_node(np_phy, -1, -1); + + if (np_conn) + edev = extcon_find_edev_by_node(np_conn); + else + edev = NULL; + + of_node_put(np_conn); + of_node_put(np_phy); + + return edev; +} + int dwc3_drd_init(struct dwc3 *dwc) { int ret, irq; - if (dwc->dev->of_node && - of_property_read_bool(dwc->dev->of_node, "extcon")) { - dwc->edev = extcon_get_edev_by_phandle(dwc->dev, 0); - - if (IS_ERR(dwc->edev)) - return PTR_ERR(dwc->edev); + dwc->edev = dwc3_get_extcon(dwc); + if (IS_ERR(dwc->edev)) + return PTR_ERR(dwc->edev); + if (dwc->edev) { dwc->edev_nb.notifier_call = dwc3_drd_notifier; ret = extcon_register_notifier(dwc->edev, EXTCON_USB_HOST, &dwc->edev_nb); -- cgit v1.1 From 79ef51894a8dfbd7c4db1d2a820c235b42499e2e Mon Sep 17 00:00:00 2001 From: Johan Hovold Date: Wed, 16 May 2018 11:42:07 +0200 Subject: USB: serial: use tty_port_register_device() We already have the tty port when probing a usb-serial port so use tty_port_register_device() directly instead of tty_port_install() later to set up the port link. This is a step towards enabling serdev for usb-serial (but we need to determine how to handle hotplugging first). Reviewed-by: Greg Kroah-Hartman Signed-off-by: Johan Hovold --- drivers/usb/serial/bus.c | 3 ++- drivers/usb/serial/usb-serial.c | 2 +- 2 files changed, 3 insertions(+), 2 deletions(-) (limited to 'drivers/usb') diff --git a/drivers/usb/serial/bus.c b/drivers/usb/serial/bus.c index 9e265eb..eb0195c 100644 --- a/drivers/usb/serial/bus.c +++ b/drivers/usb/serial/bus.c @@ -60,7 +60,8 @@ static int usb_serial_device_probe(struct device *dev) } minor = port->minor; - tty_dev = tty_register_device(usb_serial_tty_driver, minor, dev); + tty_dev = tty_port_register_device(&port->port, usb_serial_tty_driver, + minor, dev); if (IS_ERR(tty_dev)) { retval = PTR_ERR(tty_dev); goto err_port_remove; diff --git a/drivers/usb/serial/usb-serial.c b/drivers/usb/serial/usb-serial.c index 790e0cb..44ecf0e2 100644 --- a/drivers/usb/serial/usb-serial.c +++ b/drivers/usb/serial/usb-serial.c @@ -192,7 +192,7 @@ static int serial_install(struct tty_driver *driver, struct tty_struct *tty) if (retval) goto error_get_interface; - retval = tty_port_install(&port->port, driver, tty); + retval = tty_standard_install(driver, tty); if (retval) goto error_init_termios; -- cgit v1.1 From baf12d6ddeae74dfcfd5d19fce86260a2e1e44f2 Mon Sep 17 00:00:00 2001 From: Guido Kiener Date: Thu, 17 May 2018 19:03:25 +0200 Subject: usb: usbtmc: Remove rigol_quirk All T&M instruments should also work with rigol_quirk = 1 code path. So remove unnecessary code in rigol_quirk = 0 code path to simplify the driver. Tested-by: Dave Penkler Reviewed-by: Steve Bayless Signed-off-by: Guido Kiener Signed-off-by: Greg Kroah-Hartman --- drivers/usb/class/usbtmc.c | 81 +++++++--------------------------------------- 1 file changed, 12 insertions(+), 69 deletions(-) (limited to 'drivers/usb') diff --git a/drivers/usb/class/usbtmc.c b/drivers/usb/class/usbtmc.c index bdb1de0..529295a 100644 --- a/drivers/usb/class/usbtmc.c +++ b/drivers/usb/class/usbtmc.c @@ -21,7 +21,6 @@ #include -#define RIGOL 1 #define USBTMC_HEADER_SIZE 12 #define USBTMC_MINOR_BASE 176 @@ -93,8 +92,6 @@ struct usbtmc_device_data { /* coalesced usb488_caps from usbtmc_dev_capabilities */ __u8 usb488_caps; - u8 rigol_quirk; - /* attributes from the USB TMC spec for this device */ u8 TermChar; bool TermCharEnabled; @@ -110,17 +107,6 @@ struct usbtmc_device_data { }; #define to_usbtmc_data(d) container_of(d, struct usbtmc_device_data, kref) -struct usbtmc_ID_rigol_quirk { - __u16 idVendor; - __u16 idProduct; -}; - -static const struct usbtmc_ID_rigol_quirk usbtmc_id_quirk[] = { - { 0x1ab1, 0x0588 }, - { 0x1ab1, 0x04b0 }, - { 0, 0 } -}; - /* Forward declarations */ static struct usb_driver usbtmc_driver; @@ -603,16 +589,14 @@ static ssize_t usbtmc_read(struct file *filp, char __user *buf, goto exit; } - if (data->rigol_quirk) { - dev_dbg(dev, "usb_bulk_msg_in: count(%zu)\n", count); + dev_dbg(dev, "usb_bulk_msg_in: count(%zu)\n", count); - retval = send_request_dev_dep_msg_in(data, count); + retval = send_request_dev_dep_msg_in(data, count); - if (retval < 0) { - if (data->auto_abort) - usbtmc_ioctl_abort_bulk_out(data); - goto exit; - } + if (retval < 0) { + if (data->auto_abort) + usbtmc_ioctl_abort_bulk_out(data); + goto exit; } /* Loop until we have fetched everything we requested */ @@ -621,23 +605,6 @@ static ssize_t usbtmc_read(struct file *filp, char __user *buf, done = 0; while (remaining > 0) { - if (!data->rigol_quirk) { - dev_dbg(dev, "usb_bulk_msg_in: remaining(%zu), count(%zu)\n", remaining, count); - - if (remaining > USBTMC_SIZE_IOBUFFER - USBTMC_HEADER_SIZE - 3) - this_part = USBTMC_SIZE_IOBUFFER - USBTMC_HEADER_SIZE - 3; - else - this_part = remaining; - - retval = send_request_dev_dep_msg_in(data, this_part); - if (retval < 0) { - dev_err(dev, "usb_bulk_msg returned %d\n", retval); - if (data->auto_abort) - usbtmc_ioctl_abort_bulk_out(data); - goto exit; - } - } - /* Send bulk URB */ retval = usb_bulk_msg(data->usb_dev, usb_rcvbulkpipe(data->usb_dev, @@ -658,7 +625,7 @@ static ssize_t usbtmc_read(struct file *filp, char __user *buf, } /* Parse header in first packet */ - if ((done == 0) || !data->rigol_quirk) { + if (done == 0) { /* Sanity checks for the header */ if (actual < USBTMC_HEADER_SIZE) { dev_err(dev, "Device sent too small first packet: %u < %u\n", actual, USBTMC_HEADER_SIZE); @@ -698,20 +665,11 @@ static ssize_t usbtmc_read(struct file *filp, char __user *buf, actual -= USBTMC_HEADER_SIZE; /* Check if the message is smaller than requested */ - if (data->rigol_quirk) { - if (remaining > n_characters) - remaining = n_characters; - /* Remove padding if it exists */ - if (actual > remaining) - actual = remaining; - } - else { - if (this_part > n_characters) - this_part = n_characters; - /* Remove padding if it exists */ - if (actual > this_part) - actual = this_part; - } + if (remaining > n_characters) + remaining = n_characters; + /* Remove padding if it exists */ + if (actual > remaining) + actual = remaining; dev_dbg(dev, "Bulk-IN header: N_characters(%u), bTransAttr(%u)\n", n_characters, buffer[8]); @@ -1365,7 +1323,6 @@ static int usbtmc_probe(struct usb_interface *intf, struct usbtmc_device_data *data; struct usb_host_interface *iface_desc; struct usb_endpoint_descriptor *bulk_in, *bulk_out, *int_in; - int n; int retcode; dev_dbg(&intf->dev, "%s called\n", __func__); @@ -1385,20 +1342,6 @@ static int usbtmc_probe(struct usb_interface *intf, atomic_set(&data->srq_asserted, 0); data->zombie = 0; - /* Determine if it is a Rigol or not */ - data->rigol_quirk = 0; - dev_dbg(&intf->dev, "Trying to find if device Vendor 0x%04X Product 0x%04X has the RIGOL quirk\n", - le16_to_cpu(data->usb_dev->descriptor.idVendor), - le16_to_cpu(data->usb_dev->descriptor.idProduct)); - for(n = 0; usbtmc_id_quirk[n].idVendor > 0; n++) { - if ((usbtmc_id_quirk[n].idVendor == le16_to_cpu(data->usb_dev->descriptor.idVendor)) && - (usbtmc_id_quirk[n].idProduct == le16_to_cpu(data->usb_dev->descriptor.idProduct))) { - dev_dbg(&intf->dev, "Setting this device as having the RIGOL quirk\n"); - data->rigol_quirk = 1; - break; - } - } - /* Initialize USBTMC bTag and other fields */ data->bTag = 1; data->TermCharEnabled = 0; -- cgit v1.1 From a31e63b608ff78c77d8e033347239431d522fe5d Mon Sep 17 00:00:00 2001 From: Anurag Kumar Vulisha Date: Tue, 27 Mar 2018 16:35:20 +0530 Subject: usb: dwc3: gadget: Correct handling of scattergather lists The code logic in dwc3_prepare_one_trb() incorrectly uses the address and length fields present in req packet for mapping TRB's instead of using the address and length fields of scattergather lists. This patch correct's the code to use sg->address and sg->length when scattergather lists are present. Signed-off-by: Anurag Kumar Vulisha Signed-off-by: Felipe Balbi --- drivers/usb/dwc3/core.h | 2 ++ drivers/usb/dwc3/gadget.c | 25 ++++++++++++++++++++++--- 2 files changed, 24 insertions(+), 3 deletions(-) (limited to 'drivers/usb') diff --git a/drivers/usb/dwc3/core.h b/drivers/usb/dwc3/core.h index 1765e01..b6ca898 100644 --- a/drivers/usb/dwc3/core.h +++ b/drivers/usb/dwc3/core.h @@ -832,6 +832,7 @@ struct dwc3_hwparams { * @list: a list_head used for request queueing * @dep: struct dwc3_ep owning this request * @sg: pointer to first incomplete sg + * @start_sg: pointer to the sg which should be queued next * @num_pending_sgs: counter to pending sgs * @remaining: amount of data remaining * @epnum: endpoint number to which this request refers @@ -848,6 +849,7 @@ struct dwc3_request { struct list_head list; struct dwc3_ep *dep; struct scatterlist *sg; + struct scatterlist *start_sg; unsigned num_pending_sgs; unsigned remaining; diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c index 8796a5ee..56ca166 100644 --- a/drivers/usb/dwc3/gadget.c +++ b/drivers/usb/dwc3/gadget.c @@ -985,11 +985,19 @@ static void dwc3_prepare_one_trb(struct dwc3_ep *dep, struct dwc3_request *req, unsigned chain, unsigned node) { struct dwc3_trb *trb; - unsigned length = req->request.length; + unsigned int length; + dma_addr_t dma; unsigned stream_id = req->request.stream_id; unsigned short_not_ok = req->request.short_not_ok; unsigned no_interrupt = req->request.no_interrupt; - dma_addr_t dma = req->request.dma; + + if (req->request.num_sgs > 0) { + length = sg_dma_len(req->start_sg); + dma = sg_dma_address(req->start_sg); + } else { + length = req->request.length; + dma = req->request.dma; + } trb = &dep->trb_pool[dep->trb_enqueue]; @@ -1055,7 +1063,7 @@ static u32 dwc3_calc_trbs_left(struct dwc3_ep *dep) static void dwc3_prepare_one_trb_sg(struct dwc3_ep *dep, struct dwc3_request *req) { - struct scatterlist *sg = req->sg; + struct scatterlist *sg = req->start_sg; struct scatterlist *s; int i; @@ -1088,6 +1096,16 @@ static void dwc3_prepare_one_trb_sg(struct dwc3_ep *dep, dwc3_prepare_one_trb(dep, req, chain, i); } + /* + * There can be a situation where all sgs in sglist are not + * queued because of insufficient trb number. To handle this + * case, update start_sg to next sg to be queued, so that + * we have free trbs we can continue queuing from where we + * previously stopped + */ + if (chain) + req->start_sg = sg_next(s); + if (!dwc3_calc_trbs_left(dep)) break; } @@ -1178,6 +1196,7 @@ static void dwc3_prepare_trbs(struct dwc3_ep *dep) return; req->sg = req->request.sg; + req->start_sg = req->sg; req->num_pending_sgs = req->request.num_mapped_sgs; if (req->num_pending_sgs > 0) -- cgit v1.1 From c96e6725db9d6a04ac1bee881e3034b636d9f71c Mon Sep 17 00:00:00 2001 From: Anurag Kumar Vulisha Date: Tue, 27 Mar 2018 16:35:21 +0530 Subject: usb: dwc3: gadget: Correct the logic for queuing sgs The present code correctly fetches the req which were previously not queued from the started_list but fails to continue queuing from the sg where it previously stopped queuing (because of the unavailable TRB's). This patch correct's the code to continue queuing from the correct sg present in the sglist. For example, consider 5 sgs in req. Because of limited TRB's among the 5 sgs only 3 got queued. This patch corrects the code to start queuing from correct sg i.e 4th sg when the TRBs are available. Signed-off-by: Anurag Kumar Vulisha Signed-off-by: Felipe Balbi --- drivers/usb/dwc3/core.h | 2 ++ drivers/usb/dwc3/gadget.c | 23 ++++++++++++++++++++--- 2 files changed, 22 insertions(+), 3 deletions(-) (limited to 'drivers/usb') diff --git a/drivers/usb/dwc3/core.h b/drivers/usb/dwc3/core.h index b6ca898..ab93d22 100644 --- a/drivers/usb/dwc3/core.h +++ b/drivers/usb/dwc3/core.h @@ -834,6 +834,7 @@ struct dwc3_hwparams { * @sg: pointer to first incomplete sg * @start_sg: pointer to the sg which should be queued next * @num_pending_sgs: counter to pending sgs + * @num_queued_sgs: counter to the number of sgs which already got queued * @remaining: amount of data remaining * @epnum: endpoint number to which this request refers * @trb: pointer to struct dwc3_trb @@ -852,6 +853,7 @@ struct dwc3_request { struct scatterlist *start_sg; unsigned num_pending_sgs; + unsigned int num_queued_sgs; unsigned remaining; u8 epnum; struct dwc3_trb *trb; diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c index 56ca166..43cbc36 100644 --- a/drivers/usb/dwc3/gadget.c +++ b/drivers/usb/dwc3/gadget.c @@ -1067,7 +1067,10 @@ static void dwc3_prepare_one_trb_sg(struct dwc3_ep *dep, struct scatterlist *s; int i; - for_each_sg(sg, s, req->num_pending_sgs, i) { + unsigned int remaining = req->request.num_mapped_sgs + - req->num_queued_sgs; + + for_each_sg(sg, s, remaining, i) { unsigned int length = req->request.length; unsigned int maxp = usb_endpoint_maxp(dep->endpoint.desc); unsigned int rem = length % maxp; @@ -1106,6 +1109,8 @@ static void dwc3_prepare_one_trb_sg(struct dwc3_ep *dep, if (chain) req->start_sg = sg_next(s); + req->num_queued_sgs++; + if (!dwc3_calc_trbs_left(dep)) break; } @@ -1197,6 +1202,7 @@ static void dwc3_prepare_trbs(struct dwc3_ep *dep) req->sg = req->request.sg; req->start_sg = req->sg; + req->num_queued_sgs = 0; req->num_pending_sgs = req->request.num_mapped_sgs; if (req->num_pending_sgs > 0) @@ -2380,8 +2386,19 @@ static int dwc3_cleanup_done_reqs(struct dwc3 *dwc, struct dwc3_ep *dep, req->request.actual = length - req->remaining; - if ((req->request.actual < length) && req->num_pending_sgs) - return __dwc3_gadget_kick_transfer(dep); + if (req->request.actual < length || req->num_pending_sgs) { + /* + * There could be a scenario where the whole req can't + * be mapped into available TRB's. In that case, we need + * to kick transfer again if (req->num_pending_sgs > 0) + */ + if (req->num_pending_sgs) { + dev_WARN_ONCE(dwc->dev, + (req->request.actual == length), + "There are some pending sg's that needs to be queued again\n"); + return __dwc3_gadget_kick_transfer(dep); + } + } dwc3_gadget_giveback(dep, req, status); -- cgit v1.1 From 52fcc0bead0fd5e56dc07f17010e5d6da2306ddf Mon Sep 17 00:00:00 2001 From: Felipe Balbi Date: Mon, 26 Mar 2018 13:19:43 +0300 Subject: usb: dwc3: gadget: pre-issue Start Transfer for Interrupt EPs too Interrupt endpoints behave much like Bulk endpoints with the exception that they are periodic. We can pre-issue Start Transfer exactly as we do for Bulk endpoints. While at that, remove one trailing blank line which is unnecessary. Signed-off-by: Felipe Balbi --- drivers/usb/dwc3/gadget.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'drivers/usb') diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c index 43cbc36..36fabde 100644 --- a/drivers/usb/dwc3/gadget.c +++ b/drivers/usb/dwc3/gadget.c @@ -671,7 +671,8 @@ static int __dwc3_gadget_ep_enable(struct dwc3_ep *dep, * Issue StartTransfer here with no-op TRB so we can always rely on No * Response Update Transfer command. */ - if (usb_endpoint_xfer_bulk(desc)) { + if (usb_endpoint_xfer_bulk(desc) || + usb_endpoint_xfer_int(desc)) { struct dwc3_gadget_ep_cmd_params params; struct dwc3_trb *trb; dma_addr_t trb_dma; @@ -696,7 +697,6 @@ static int __dwc3_gadget_ep_enable(struct dwc3_ep *dep, WARN_ON_ONCE(!dep->resource_index); } - out: trace_dwc3_gadget_ep_enable(dep); -- cgit v1.1 From 38408464aa7646e4d7b345a70951f968af35af0a Mon Sep 17 00:00:00 2001 From: Felipe Balbi Date: Mon, 26 Mar 2018 13:26:00 +0300 Subject: usb: dwc3: gadget: XferNotReady is Isoc-only We don't use XferNotReady for anything other than Default Control Pipe, which is handled in ep0.c, and Isochronous endpoints. Let's make that clear in the code. Signed-off-by: Felipe Balbi --- drivers/usb/dwc3/gadget.c | 10 ++++++---- 1 file changed, 6 insertions(+), 4 deletions(-) (limited to 'drivers/usb') diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c index 36fabde..22c0822 100644 --- a/drivers/usb/dwc3/gadget.c +++ b/drivers/usb/dwc3/gadget.c @@ -2533,11 +2533,13 @@ static void dwc3_endpoint_interrupt(struct dwc3 *dwc, dwc3_endpoint_transfer_complete(dwc, dep, event); break; case DWC3_DEPEVT_XFERNOTREADY: - if (usb_endpoint_xfer_isoc(dep->endpoint.desc)) - dwc3_gadget_start_isoc(dwc, dep, event); - else - __dwc3_gadget_kick_transfer(dep); + if (!usb_endpoint_xfer_isoc(dep->endpoint.desc)) { + dev_err(dwc->dev, "XferNotReady for non-Isoc %s\n", + dep->name); + return; + } + dwc3_gadget_start_isoc(dwc, dep, event); break; case DWC3_DEPEVT_STREAMEVT: if (!usb_endpoint_xfer_bulk(dep->endpoint.desc)) { -- cgit v1.1 From 742a4fff5f298806d3d4ed2e229857fbe56e12c5 Mon Sep 17 00:00:00 2001 From: Felipe Balbi Date: Mon, 26 Mar 2018 13:26:56 +0300 Subject: usb: dwc3: gadget: XferComplete only for EP0 XferComplete is enabled only for the default control pipe, let's make that clear in the code. Signed-off-by: Felipe Balbi --- drivers/usb/dwc3/gadget.c | 11 +---------- 1 file changed, 1 insertion(+), 10 deletions(-) (limited to 'drivers/usb') diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c index 22c0822..ec0e3a8 100644 --- a/drivers/usb/dwc3/gadget.c +++ b/drivers/usb/dwc3/gadget.c @@ -2519,16 +2519,6 @@ static void dwc3_endpoint_interrupt(struct dwc3 *dwc, } switch (event->endpoint_event) { - case DWC3_DEPEVT_XFERCOMPLETE: - dep->resource_index = 0; - - if (usb_endpoint_xfer_isoc(dep->endpoint.desc)) { - dev_err(dwc->dev, "XferComplete for Isochronous endpoint\n"); - return; - } - - dwc3_endpoint_transfer_complete(dwc, dep, event); - break; case DWC3_DEPEVT_XFERINPROGRESS: dwc3_endpoint_transfer_complete(dwc, dep, event); break; @@ -2556,6 +2546,7 @@ static void dwc3_endpoint_interrupt(struct dwc3 *dwc, wake_up(&dep->wait_end_transfer); } break; + case DWC3_DEPEVT_XFERCOMPLETE: case DWC3_DEPEVT_RXTXFIFOEVT: break; } -- cgit v1.1 From fbea935accf4895fed40dd4b79839923271bb9b3 Mon Sep 17 00:00:00 2001 From: Felipe Balbi Date: Mon, 26 Mar 2018 13:29:17 +0300 Subject: usb: dwc3: gadget: rename dwc3_endpoint_transfer_complete() Now that we're making sure we don't have XferComplete events, we can rename this function to what it actually handles: dwc3_gadget_endpoint_transfer_in_progress() Signed-off-by: Felipe Balbi --- drivers/usb/dwc3/gadget.c | 9 +++------ 1 file changed, 3 insertions(+), 6 deletions(-) (limited to 'drivers/usb') diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c index ec0e3a8..e0377c0 100644 --- a/drivers/usb/dwc3/gadget.c +++ b/drivers/usb/dwc3/gadget.c @@ -2441,20 +2441,17 @@ static int dwc3_cleanup_done_reqs(struct dwc3 *dwc, struct dwc3_ep *dep, return 1; } -static void dwc3_endpoint_transfer_complete(struct dwc3 *dwc, +static void dwc3_gadget_endpoint_transfer_in_progress(struct dwc3 *dwc, struct dwc3_ep *dep, const struct dwc3_event_depevt *event) { unsigned status = 0; int clean_busy; - u32 is_xfer_complete; - - is_xfer_complete = (event->endpoint_event == DWC3_DEPEVT_XFERCOMPLETE); if (event->status & DEPEVT_STATUS_BUSERR) status = -ECONNRESET; clean_busy = dwc3_cleanup_done_reqs(dwc, dep, event, status); - if (clean_busy && (!dep->endpoint.desc || is_xfer_complete || + if (clean_busy && (!dep->endpoint.desc || usb_endpoint_xfer_isoc(dep->endpoint.desc))) dep->flags &= ~DWC3_EP_BUSY; @@ -2520,7 +2517,7 @@ static void dwc3_endpoint_interrupt(struct dwc3 *dwc, switch (event->endpoint_event) { case DWC3_DEPEVT_XFERINPROGRESS: - dwc3_endpoint_transfer_complete(dwc, dep, event); + dwc3_gadget_endpoint_transfer_in_progress(dwc, dep, event); break; case DWC3_DEPEVT_XFERNOTREADY: if (!usb_endpoint_xfer_isoc(dep->endpoint.desc)) { -- cgit v1.1 From a861282f503731bc0cf7c3d08ca901e2a82daadc Mon Sep 17 00:00:00 2001 From: Felipe Balbi Date: Mon, 26 Mar 2018 13:32:47 +0300 Subject: usb: dwc3: gadget: don't kick transfer all the time Instead of constantly calling kick transfer everything some event shows up, let's just rely on the fact that we send Update Transfer every time a new request is queued. Signed-off-by: Felipe Balbi --- drivers/usb/dwc3/gadget.c | 11 ----------- 1 file changed, 11 deletions(-) (limited to 'drivers/usb') diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c index e0377c0..d016ced 100644 --- a/drivers/usb/dwc3/gadget.c +++ b/drivers/usb/dwc3/gadget.c @@ -2479,17 +2479,6 @@ static void dwc3_gadget_endpoint_transfer_in_progress(struct dwc3 *dwc, dwc->u1u2 = 0; } - - /* - * Our endpoint might get disabled by another thread during - * dwc3_gadget_giveback(). If that happens, we're just gonna return 1 - * early on so DWC3_EP_BUSY flag gets cleared - */ - if (!dep->endpoint.desc) - return; - - if (!usb_endpoint_xfer_isoc(dep->endpoint.desc)) - __dwc3_gadget_kick_transfer(dep); } static void dwc3_endpoint_interrupt(struct dwc3 *dwc, -- cgit v1.1 From 66f5dd5a03797bf52f8386e7ed7c67c4395126f6 Mon Sep 17 00:00:00 2001 From: Felipe Balbi Date: Mon, 26 Mar 2018 15:48:22 +0300 Subject: usb: dwc3: gadget: rename done_trbs and done_reqs This patch simply renames two functions to more descriptive names so that it's easier to understand what they're doing. Cleanup only, no functional changes. Signed-off-by: Felipe Balbi --- drivers/usb/dwc3/gadget.c | 29 ++++++++++++++++------------- 1 file changed, 16 insertions(+), 13 deletions(-) (limited to 'drivers/usb') diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c index d016ced..9afa84d 100644 --- a/drivers/usb/dwc3/gadget.c +++ b/drivers/usb/dwc3/gadget.c @@ -2248,10 +2248,10 @@ static void dwc3_gadget_free_endpoints(struct dwc3 *dwc) /* -------------------------------------------------------------------------- */ -static int __dwc3_cleanup_done_trbs(struct dwc3 *dwc, struct dwc3_ep *dep, - struct dwc3_request *req, struct dwc3_trb *trb, - const struct dwc3_event_depevt *event, int status, - int chain) +static int dwc3_gadget_ep_reclaim_completed_trbs(struct dwc3 *dwc, + struct dwc3_ep *dep, struct dwc3_request *req, + struct dwc3_trb *trb, const struct dwc3_event_depevt *event, + int status, int chain) { unsigned int count; unsigned int s_pkt = 0; @@ -2336,8 +2336,9 @@ static int __dwc3_cleanup_done_trbs(struct dwc3 *dwc, struct dwc3_ep *dep, return 0; } -static int dwc3_cleanup_done_reqs(struct dwc3 *dwc, struct dwc3_ep *dep, - const struct dwc3_event_depevt *event, int status) +static int dwc3_gadget_ep_cleanup_completed_requests(struct dwc3 *dwc, + struct dwc3_ep *dep, const struct dwc3_event_depevt *event, + int status) { struct dwc3_request *req, *n; struct dwc3_trb *trb; @@ -2365,21 +2366,22 @@ static int dwc3_cleanup_done_reqs(struct dwc3 *dwc, struct dwc3_ep *dep, req->sg = sg_next(s); req->num_pending_sgs--; - ret = __dwc3_cleanup_done_trbs(dwc, dep, req, trb, - event, status, chain); + ret = dwc3_gadget_ep_reclaim_completed_trbs(dwc, + dep, req, trb, event, status, + chain); if (ret) break; } } else { trb = &dep->trb_pool[dep->trb_dequeue]; - ret = __dwc3_cleanup_done_trbs(dwc, dep, req, trb, - event, status, chain); + ret = dwc3_gadget_ep_reclaim_completed_trbs(dwc, dep, + req, trb, event, status, chain); } if (req->unaligned || req->zero) { trb = &dep->trb_pool[dep->trb_dequeue]; - ret = __dwc3_cleanup_done_trbs(dwc, dep, req, trb, - event, status, false); + ret = dwc3_gadget_ep_reclaim_completed_trbs(dwc, dep, + req, trb, event, status, false); req->unaligned = false; req->zero = false; } @@ -2450,7 +2452,8 @@ static void dwc3_gadget_endpoint_transfer_in_progress(struct dwc3 *dwc, if (event->status & DEPEVT_STATUS_BUSERR) status = -ECONNRESET; - clean_busy = dwc3_cleanup_done_reqs(dwc, dep, event, status); + clean_busy = dwc3_gadget_ep_cleanup_completed_requests(dwc, dep, event, + status); if (clean_busy && (!dep->endpoint.desc || usb_endpoint_xfer_isoc(dep->endpoint.desc))) dep->flags &= ~DWC3_EP_BUSY; -- cgit v1.1 From 0bd0f6d201ebdc1ae07e334ea33e0b8433573628 Mon Sep 17 00:00:00 2001 From: Felipe Balbi Date: Mon, 26 Mar 2018 16:09:00 +0300 Subject: usb: dwc3: gadget: remove allocated/queued request tracking That has never proven useful in any way. Just remove it. Signed-off-by: Felipe Balbi --- drivers/usb/dwc3/core.h | 4 ---- drivers/usb/dwc3/gadget.c | 21 ++++++--------------- drivers/usb/dwc3/trace.h | 7 ++----- 3 files changed, 8 insertions(+), 24 deletions(-) (limited to 'drivers/usb') diff --git a/drivers/usb/dwc3/core.h b/drivers/usb/dwc3/core.h index ab93d22..9ee77af 100644 --- a/drivers/usb/dwc3/core.h +++ b/drivers/usb/dwc3/core.h @@ -639,8 +639,6 @@ struct dwc3_event_buffer { * @resource_index: Resource transfer index * @frame_number: set to the frame number we want this transfer to start (ISOC) * @interval: the interval on which the ISOC transfer is started - * @allocated_requests: number of requests allocated - * @queued_requests: number of requests queued for transfer * @name: a human readable name e.g. ep1out-bulk * @direction: true for TX, false for RX * @stream_capable: true when streams are enabled @@ -688,8 +686,6 @@ struct dwc3_ep { u8 number; u8 type; u8 resource_index; - u32 allocated_requests; - u32 queued_requests; u32 frame_number; u32 interval; diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c index 9afa84d..298b3fd 100644 --- a/drivers/usb/dwc3/gadget.c +++ b/drivers/usb/dwc3/gadget.c @@ -840,7 +840,7 @@ static int dwc3_gadget_ep_disable(struct usb_ep *ep) } static struct usb_request *dwc3_gadget_ep_alloc_request(struct usb_ep *ep, - gfp_t gfp_flags) + gfp_t gfp_flags) { struct dwc3_request *req; struct dwc3_ep *dep = to_dwc3_ep(ep); @@ -852,8 +852,6 @@ static struct usb_request *dwc3_gadget_ep_alloc_request(struct usb_ep *ep, req->epnum = dep->number; req->dep = dep; - dep->allocated_requests++; - trace_dwc3_alloc_request(req); return &req->request; @@ -863,9 +861,7 @@ static void dwc3_gadget_ep_free_request(struct usb_ep *ep, struct usb_request *request) { struct dwc3_request *req = to_dwc3_request(request); - struct dwc3_ep *dep = to_dwc3_ep(ep); - dep->allocated_requests--; trace_dwc3_free_request(req); kfree(req); } @@ -1005,7 +1001,6 @@ static void dwc3_prepare_one_trb(struct dwc3_ep *dep, dwc3_gadget_move_started_request(req); req->trb = trb; req->trb_dma = dwc3_trb_dma_offset(dep, trb); - dep->queued_requests++; } __dwc3_prepare_one_trb(dep, trb, dma, length, chain, node, @@ -1258,7 +1253,6 @@ static int __dwc3_gadget_kick_transfer(struct dwc3_ep *dep) */ if (req->trb) memset(req->trb, 0, sizeof(struct dwc3_trb)); - dep->queued_requests--; dwc3_gadget_del_and_unmap_request(dep, req, ret); return ret; } @@ -1488,7 +1482,7 @@ static int dwc3_gadget_ep_dequeue(struct usb_ep *ep, out1: /* giveback the request */ - dep->queued_requests--; + dwc3_gadget_giveback(dep, req, -ECONNRESET); out0: @@ -2248,7 +2242,7 @@ static void dwc3_gadget_free_endpoints(struct dwc3 *dwc) /* -------------------------------------------------------------------------- */ -static int dwc3_gadget_ep_reclaim_completed_trbs(struct dwc3 *dwc, +static int dwc3_gadget_ep_reclaim_completed_trb(struct dwc3 *dwc, struct dwc3_ep *dep, struct dwc3_request *req, struct dwc3_trb *trb, const struct dwc3_event_depevt *event, int status, int chain) @@ -2259,9 +2253,6 @@ static int dwc3_gadget_ep_reclaim_completed_trbs(struct dwc3 *dwc, dwc3_ep_inc_deq(dep); - if (req->trb == trb) - dep->queued_requests--; - trace_dwc3_complete_trb(dep, trb); /* @@ -2366,7 +2357,7 @@ static int dwc3_gadget_ep_cleanup_completed_requests(struct dwc3 *dwc, req->sg = sg_next(s); req->num_pending_sgs--; - ret = dwc3_gadget_ep_reclaim_completed_trbs(dwc, + ret = dwc3_gadget_ep_reclaim_completed_trb(dwc, dep, req, trb, event, status, chain); if (ret) @@ -2374,13 +2365,13 @@ static int dwc3_gadget_ep_cleanup_completed_requests(struct dwc3 *dwc, } } else { trb = &dep->trb_pool[dep->trb_dequeue]; - ret = dwc3_gadget_ep_reclaim_completed_trbs(dwc, dep, + ret = dwc3_gadget_ep_reclaim_completed_trb(dwc, dep, req, trb, event, status, chain); } if (req->unaligned || req->zero) { trb = &dep->trb_pool[dep->trb_dequeue]; - ret = dwc3_gadget_ep_reclaim_completed_trbs(dwc, dep, + ret = dwc3_gadget_ep_reclaim_completed_trb(dwc, dep, req, trb, event, status, false); req->unaligned = false; req->zero = false; diff --git a/drivers/usb/dwc3/trace.h b/drivers/usb/dwc3/trace.h index babaee9..08a6b82 100644 --- a/drivers/usb/dwc3/trace.h +++ b/drivers/usb/dwc3/trace.h @@ -230,17 +230,14 @@ DECLARE_EVENT_CLASS(dwc3_log_trb, TP_fast_assign( __assign_str(name, dep->name); __entry->trb = trb; - __entry->allocated = dep->allocated_requests; - __entry->queued = dep->queued_requests; __entry->bpl = trb->bpl; __entry->bph = trb->bph; __entry->size = trb->size; __entry->ctrl = trb->ctrl; __entry->type = usb_endpoint_type(dep->endpoint.desc); ), - TP_printk("%s: %d/%d trb %p buf %08x%08x size %s%d ctrl %08x (%c%c%c%c:%c%c:%s)", - __get_str(name), __entry->queued, __entry->allocated, - __entry->trb, __entry->bph, __entry->bpl, + TP_printk("%s: trb %p buf %08x%08x size %s%d ctrl %08x (%c%c%c%c:%c%c:%s)", + __get_str(name), __entry->trb, __entry->bph, __entry->bpl, ({char *s; int pcm = ((__entry->size >> 24) & 3) + 1; switch (__entry->type) { -- cgit v1.1 From a24a6ab1493a14225310610e23f1b6186214a7bd Mon Sep 17 00:00:00 2001 From: Felipe Balbi Date: Tue, 27 Mar 2018 10:41:39 +0300 Subject: usb: dwc3: gadget: remove some pointless checks We *KNOW* which events we enable for which endpoint types and we *KNOW* when they'll trigger. The endpoint type checks are pointless. Signed-off-by: Felipe Balbi --- drivers/usb/dwc3/gadget.c | 14 +------------- 1 file changed, 1 insertion(+), 13 deletions(-) (limited to 'drivers/usb') diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c index 298b3fd..65cdb54 100644 --- a/drivers/usb/dwc3/gadget.c +++ b/drivers/usb/dwc3/gadget.c @@ -2503,21 +2503,8 @@ static void dwc3_endpoint_interrupt(struct dwc3 *dwc, dwc3_gadget_endpoint_transfer_in_progress(dwc, dep, event); break; case DWC3_DEPEVT_XFERNOTREADY: - if (!usb_endpoint_xfer_isoc(dep->endpoint.desc)) { - dev_err(dwc->dev, "XferNotReady for non-Isoc %s\n", - dep->name); - return; - } - dwc3_gadget_start_isoc(dwc, dep, event); break; - case DWC3_DEPEVT_STREAMEVT: - if (!usb_endpoint_xfer_bulk(dep->endpoint.desc)) { - dev_err(dwc->dev, "Stream event for non-Bulk %s\n", - dep->name); - return; - } - break; case DWC3_DEPEVT_EPCMDCMPLT: cmd = DEPEVT_PARAMETER_CMD(event->parameters); @@ -2526,6 +2513,7 @@ static void dwc3_endpoint_interrupt(struct dwc3 *dwc, wake_up(&dep->wait_end_transfer); } break; + case DWC3_DEPEVT_STREAMEVT: case DWC3_DEPEVT_XFERCOMPLETE: case DWC3_DEPEVT_RXTXFIFOEVT: break; -- cgit v1.1 From ed27442e509331cd07ceb584dd01eadbdb5ee9b3 Mon Sep 17 00:00:00 2001 From: Felipe Balbi Date: Tue, 27 Mar 2018 10:42:59 +0300 Subject: usb: dwc3: gadget: rename dwc3_gadget_start_isoc() Cleanup only, no functional changes. This just matches the event name with its handler. Signed-off-by: Felipe Balbi --- drivers/usb/dwc3/gadget.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'drivers/usb') diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c index 65cdb54..d7fb3553 100644 --- a/drivers/usb/dwc3/gadget.c +++ b/drivers/usb/dwc3/gadget.c @@ -1293,7 +1293,7 @@ static void __dwc3_gadget_start_isoc(struct dwc3 *dwc, __dwc3_gadget_kick_transfer(dep); } -static void dwc3_gadget_start_isoc(struct dwc3 *dwc, +static void dwc3_gadget_endpoint_transfer_not_ready(struct dwc3 *dwc, struct dwc3_ep *dep, const struct dwc3_event_depevt *event) { u32 cur_uf, mask; @@ -2503,7 +2503,7 @@ static void dwc3_endpoint_interrupt(struct dwc3 *dwc, dwc3_gadget_endpoint_transfer_in_progress(dwc, dep, event); break; case DWC3_DEPEVT_XFERNOTREADY: - dwc3_gadget_start_isoc(dwc, dep, event); + dwc3_gadget_endpoint_transfer_not_ready(dwc, dep, event); break; case DWC3_DEPEVT_EPCMDCMPLT: cmd = DEPEVT_PARAMETER_CMD(event->parameters); -- cgit v1.1 From 320338651d331847e0520717b8a2d6ef5150d2fe Mon Sep 17 00:00:00 2001 From: Felipe Balbi Date: Tue, 27 Mar 2018 10:47:48 +0300 Subject: usb: dwc3: gadget: move handler closer to calling site Cleanup only, no functional changes. Just making code easier to follow. Signed-off-by: Felipe Balbi --- drivers/usb/dwc3/gadget.c | 22 +++++++++++----------- 1 file changed, 11 insertions(+), 11 deletions(-) (limited to 'drivers/usb') diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c index d7fb3553..6876f36 100644 --- a/drivers/usb/dwc3/gadget.c +++ b/drivers/usb/dwc3/gadget.c @@ -1293,17 +1293,6 @@ static void __dwc3_gadget_start_isoc(struct dwc3 *dwc, __dwc3_gadget_kick_transfer(dep); } -static void dwc3_gadget_endpoint_transfer_not_ready(struct dwc3 *dwc, - struct dwc3_ep *dep, const struct dwc3_event_depevt *event) -{ - u32 cur_uf, mask; - - mask = ~(dep->interval - 1); - cur_uf = event->parameters & mask; - - __dwc3_gadget_start_isoc(dwc, dep, cur_uf); -} - static int __dwc3_gadget_ep_queue(struct dwc3_ep *dep, struct dwc3_request *req) { struct dwc3 *dwc = dep->dwc; @@ -2475,6 +2464,17 @@ static void dwc3_gadget_endpoint_transfer_in_progress(struct dwc3 *dwc, } } +static void dwc3_gadget_endpoint_transfer_not_ready(struct dwc3 *dwc, + struct dwc3_ep *dep, const struct dwc3_event_depevt *event) +{ + u32 cur_uf, mask; + + mask = ~(dep->interval - 1); + cur_uf = event->parameters & mask; + + __dwc3_gadget_start_isoc(dwc, dep, cur_uf); +} + static void dwc3_endpoint_interrupt(struct dwc3 *dwc, const struct dwc3_event_depevt *event) { -- cgit v1.1 From 8f608e8ab62868d0dee7e2dd928239a55c133b43 Mon Sep 17 00:00:00 2001 From: Felipe Balbi Date: Tue, 27 Mar 2018 10:53:29 +0300 Subject: usb: dwc3: gadget: remove unnecessary 'dwc' parameter Endpoint handlers need to know about endpoints, not dwc. If they really need access to dwc (e.g. for printing error messages) we have a reference to it tucked inside the endpoint. This patch has no functional changes, it's simply moving things around. Signed-off-by: Felipe Balbi --- drivers/usb/dwc3/gadget.c | 68 ++++++++++++++++++++++------------------------- 1 file changed, 32 insertions(+), 36 deletions(-) (limited to 'drivers/usb') diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c index 6876f36..127cb3e 100644 --- a/drivers/usb/dwc3/gadget.c +++ b/drivers/usb/dwc3/gadget.c @@ -703,12 +703,12 @@ out: return 0; } -static void dwc3_stop_active_transfer(struct dwc3 *dwc, u32 epnum, bool force); +static void dwc3_stop_active_transfer(struct dwc3_ep *dep, bool force); static void dwc3_remove_requests(struct dwc3 *dwc, struct dwc3_ep *dep) { struct dwc3_request *req; - dwc3_stop_active_transfer(dwc, dep->number, true); + dwc3_stop_active_transfer(dep, true); /* - giveback all requests to gadget driver */ while (!list_empty(&dep->started_list)) { @@ -1275,11 +1275,10 @@ static int __dwc3_gadget_get_frame(struct dwc3 *dwc) return DWC3_DSTS_SOFFN(reg); } -static void __dwc3_gadget_start_isoc(struct dwc3 *dwc, - struct dwc3_ep *dep, u32 cur_uf) +static void __dwc3_gadget_start_isoc(struct dwc3_ep *dep, u32 cur_uf) { if (list_empty(&dep->pending_list)) { - dev_info(dwc->dev, "%s: ran out of requests\n", + dev_info(dep->dwc->dev, "%s: ran out of requests\n", dep->name); dep->flags |= DWC3_EP_PENDING_REQUEST; return; @@ -1329,13 +1328,13 @@ static int __dwc3_gadget_ep_queue(struct dwc3_ep *dep, struct dwc3_request *req) if (usb_endpoint_xfer_isoc(dep->endpoint.desc)) { if ((dep->flags & DWC3_EP_PENDING_REQUEST)) { if (dep->flags & DWC3_EP_TRANSFER_STARTED) { - dwc3_stop_active_transfer(dwc, dep->number, true); + dwc3_stop_active_transfer(dep, true); dep->flags = DWC3_EP_ENABLED; } else { u32 cur_uf; cur_uf = __dwc3_gadget_get_frame(dwc); - __dwc3_gadget_start_isoc(dwc, dep, cur_uf); + __dwc3_gadget_start_isoc(dep, cur_uf); dep->flags &= ~DWC3_EP_PENDING_REQUEST; } return 0; @@ -1398,7 +1397,7 @@ static int dwc3_gadget_ep_dequeue(struct usb_ep *ep, } if (r == req) { /* wait until it is processed */ - dwc3_stop_active_transfer(dwc, dep->number, true); + dwc3_stop_active_transfer(dep, true); /* * If request was already started, this means we had to @@ -2231,10 +2230,9 @@ static void dwc3_gadget_free_endpoints(struct dwc3 *dwc) /* -------------------------------------------------------------------------- */ -static int dwc3_gadget_ep_reclaim_completed_trb(struct dwc3 *dwc, - struct dwc3_ep *dep, struct dwc3_request *req, - struct dwc3_trb *trb, const struct dwc3_event_depevt *event, - int status, int chain) +static int dwc3_gadget_ep_reclaim_completed_trb(struct dwc3_ep *dep, + struct dwc3_request *req, struct dwc3_trb *trb, + const struct dwc3_event_depevt *event, int status, int chain) { unsigned int count; unsigned int s_pkt = 0; @@ -2294,7 +2292,7 @@ static int dwc3_gadget_ep_reclaim_completed_trb(struct dwc3 *dwc, */ dep->flags |= DWC3_EP_MISSED_ISOC; } else { - dev_err(dwc->dev, "incomplete IN transfer %s\n", + dev_err(dep->dwc->dev, "incomplete IN transfer %s\n", dep->name); status = -ECONNRESET; } @@ -2316,9 +2314,8 @@ static int dwc3_gadget_ep_reclaim_completed_trb(struct dwc3 *dwc, return 0; } -static int dwc3_gadget_ep_cleanup_completed_requests(struct dwc3 *dwc, - struct dwc3_ep *dep, const struct dwc3_event_depevt *event, - int status) +static int dwc3_gadget_ep_cleanup_completed_requests(struct dwc3_ep *dep, + const struct dwc3_event_depevt *event, int status) { struct dwc3_request *req, *n; struct dwc3_trb *trb; @@ -2346,22 +2343,22 @@ static int dwc3_gadget_ep_cleanup_completed_requests(struct dwc3 *dwc, req->sg = sg_next(s); req->num_pending_sgs--; - ret = dwc3_gadget_ep_reclaim_completed_trb(dwc, - dep, req, trb, event, status, + ret = dwc3_gadget_ep_reclaim_completed_trb(dep, + req, trb, event, status, chain); if (ret) break; } } else { trb = &dep->trb_pool[dep->trb_dequeue]; - ret = dwc3_gadget_ep_reclaim_completed_trb(dwc, dep, - req, trb, event, status, chain); + ret = dwc3_gadget_ep_reclaim_completed_trb(dep, req, + trb, event, status, chain); } if (req->unaligned || req->zero) { trb = &dep->trb_pool[dep->trb_dequeue]; - ret = dwc3_gadget_ep_reclaim_completed_trb(dwc, dep, - req, trb, event, status, false); + ret = dwc3_gadget_ep_reclaim_completed_trb(dep, req, + trb, event, status, false); req->unaligned = false; req->zero = false; } @@ -2375,7 +2372,7 @@ static int dwc3_gadget_ep_cleanup_completed_requests(struct dwc3 *dwc, * to kick transfer again if (req->num_pending_sgs > 0) */ if (req->num_pending_sgs) { - dev_WARN_ONCE(dwc->dev, + dev_WARN_ONCE(dep->dwc->dev, (req->request.actual == length), "There are some pending sg's that needs to be queued again\n"); return __dwc3_gadget_kick_transfer(dep); @@ -2411,7 +2408,7 @@ static int dwc3_gadget_ep_cleanup_completed_requests(struct dwc3 *dwc, */ dep->flags = DWC3_EP_PENDING_REQUEST; } else { - dwc3_stop_active_transfer(dwc, dep->number, true); + dwc3_stop_active_transfer(dep, true); dep->flags = DWC3_EP_ENABLED; } return 1; @@ -2423,16 +2420,17 @@ static int dwc3_gadget_ep_cleanup_completed_requests(struct dwc3 *dwc, return 1; } -static void dwc3_gadget_endpoint_transfer_in_progress(struct dwc3 *dwc, - struct dwc3_ep *dep, const struct dwc3_event_depevt *event) +static void dwc3_gadget_endpoint_transfer_in_progress(struct dwc3_ep *dep, + const struct dwc3_event_depevt *event) { + struct dwc3 *dwc = dep->dwc; unsigned status = 0; int clean_busy; if (event->status & DEPEVT_STATUS_BUSERR) status = -ECONNRESET; - clean_busy = dwc3_gadget_ep_cleanup_completed_requests(dwc, dep, event, + clean_busy = dwc3_gadget_ep_cleanup_completed_requests(dep, event, status); if (clean_busy && (!dep->endpoint.desc || usb_endpoint_xfer_isoc(dep->endpoint.desc))) @@ -2464,15 +2462,15 @@ static void dwc3_gadget_endpoint_transfer_in_progress(struct dwc3 *dwc, } } -static void dwc3_gadget_endpoint_transfer_not_ready(struct dwc3 *dwc, - struct dwc3_ep *dep, const struct dwc3_event_depevt *event) +static void dwc3_gadget_endpoint_transfer_not_ready(struct dwc3_ep *dep, + const struct dwc3_event_depevt *event) { u32 cur_uf, mask; mask = ~(dep->interval - 1); cur_uf = event->parameters & mask; - __dwc3_gadget_start_isoc(dwc, dep, cur_uf); + __dwc3_gadget_start_isoc(dep, cur_uf); } static void dwc3_endpoint_interrupt(struct dwc3 *dwc, @@ -2500,10 +2498,10 @@ static void dwc3_endpoint_interrupt(struct dwc3 *dwc, switch (event->endpoint_event) { case DWC3_DEPEVT_XFERINPROGRESS: - dwc3_gadget_endpoint_transfer_in_progress(dwc, dep, event); + dwc3_gadget_endpoint_transfer_in_progress(dep, event); break; case DWC3_DEPEVT_XFERNOTREADY: - dwc3_gadget_endpoint_transfer_not_ready(dwc, dep, event); + dwc3_gadget_endpoint_transfer_not_ready(dep, event); break; case DWC3_DEPEVT_EPCMDCMPLT: cmd = DEPEVT_PARAMETER_CMD(event->parameters); @@ -2559,15 +2557,13 @@ static void dwc3_reset_gadget(struct dwc3 *dwc) } } -static void dwc3_stop_active_transfer(struct dwc3 *dwc, u32 epnum, bool force) +static void dwc3_stop_active_transfer(struct dwc3_ep *dep, bool force) { - struct dwc3_ep *dep; + struct dwc3 *dwc = dep->dwc; struct dwc3_gadget_ep_cmd_params params; u32 cmd; int ret; - dep = dwc->eps[epnum]; - if ((dep->flags & DWC3_EP_END_TRANSFER_PENDING) || !dep->resource_index) return; -- cgit v1.1 From 5828cada99086c41cf23c4d4b63090b23c473008 Mon Sep 17 00:00:00 2001 From: Felipe Balbi Date: Tue, 27 Mar 2018 11:14:31 +0300 Subject: usb: dwc3: gadget: always use frame number from XferNotReady The core requires the extra two bits of information for properly scheduling Isochronous transfers. This means that we can't rely on __dwc3_gadget_get_frame(). Let's always cache uFrame number from XferNotReady instead. Signed-off-by: Felipe Balbi --- drivers/usb/dwc3/gadget.c | 12 +++++------- 1 file changed, 5 insertions(+), 7 deletions(-) (limited to 'drivers/usb') diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c index 127cb3e..f078054 100644 --- a/drivers/usb/dwc3/gadget.c +++ b/drivers/usb/dwc3/gadget.c @@ -1275,7 +1275,7 @@ static int __dwc3_gadget_get_frame(struct dwc3 *dwc) return DWC3_DSTS_SOFFN(reg); } -static void __dwc3_gadget_start_isoc(struct dwc3_ep *dep, u32 cur_uf) +static void __dwc3_gadget_start_isoc(struct dwc3_ep *dep) { if (list_empty(&dep->pending_list)) { dev_info(dep->dwc->dev, "%s: ran out of requests\n", @@ -1288,7 +1288,7 @@ static void __dwc3_gadget_start_isoc(struct dwc3_ep *dep, u32 cur_uf) * Schedule the first trb for one interval in the future or at * least 4 microframes. */ - dep->frame_number = cur_uf + max_t(u32, 4, dep->interval); + dep->frame_number += max_t(u32, 4, dep->interval); __dwc3_gadget_kick_transfer(dep); } @@ -1331,10 +1331,7 @@ static int __dwc3_gadget_ep_queue(struct dwc3_ep *dep, struct dwc3_request *req) dwc3_stop_active_transfer(dep, true); dep->flags = DWC3_EP_ENABLED; } else { - u32 cur_uf; - - cur_uf = __dwc3_gadget_get_frame(dwc); - __dwc3_gadget_start_isoc(dep, cur_uf); + __dwc3_gadget_start_isoc(dep); dep->flags &= ~DWC3_EP_PENDING_REQUEST; } return 0; @@ -2469,8 +2466,9 @@ static void dwc3_gadget_endpoint_transfer_not_ready(struct dwc3_ep *dep, mask = ~(dep->interval - 1); cur_uf = event->parameters & mask; + dep->frame_number = cur_uf; - __dwc3_gadget_start_isoc(dep, cur_uf); + __dwc3_gadget_start_isoc(dep); } static void dwc3_endpoint_interrupt(struct dwc3 *dwc, -- cgit v1.1 From ee3638b897b9b6926d567b0ee0d9e65636138442 Mon Sep 17 00:00:00 2001 From: Felipe Balbi Date: Tue, 27 Mar 2018 11:26:53 +0300 Subject: usb: dwc3: gadget: update dep->frame_number from XferInprogress too We will need an up-to-date frame_number from XferInProgress too when future patches improve our handling of Isoc endpoints. Signed-off-by: Felipe Balbi --- drivers/usb/dwc3/gadget.c | 19 +++++++++++++------ 1 file changed, 13 insertions(+), 6 deletions(-) (limited to 'drivers/usb') diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c index f078054..6a2d412 100644 --- a/drivers/usb/dwc3/gadget.c +++ b/drivers/usb/dwc3/gadget.c @@ -2417,6 +2417,16 @@ static int dwc3_gadget_ep_cleanup_completed_requests(struct dwc3_ep *dep, return 1; } +static void dwc3_gadget_endpoint_frame_from_event(struct dwc3_ep *dep, + const struct dwc3_event_depevt *event) +{ + u32 cur_uf, mask; + + mask = ~(dep->interval - 1); + cur_uf = event->parameters & mask; + dep->frame_number = cur_uf; +} + static void dwc3_gadget_endpoint_transfer_in_progress(struct dwc3_ep *dep, const struct dwc3_event_depevt *event) { @@ -2424,6 +2434,8 @@ static void dwc3_gadget_endpoint_transfer_in_progress(struct dwc3_ep *dep, unsigned status = 0; int clean_busy; + dwc3_gadget_endpoint_frame_from_event(dep, event); + if (event->status & DEPEVT_STATUS_BUSERR) status = -ECONNRESET; @@ -2462,12 +2474,7 @@ static void dwc3_gadget_endpoint_transfer_in_progress(struct dwc3_ep *dep, static void dwc3_gadget_endpoint_transfer_not_ready(struct dwc3_ep *dep, const struct dwc3_event_depevt *event) { - u32 cur_uf, mask; - - mask = ~(dep->interval - 1); - cur_uf = event->parameters & mask; - dep->frame_number = cur_uf; - + dwc3_gadget_endpoint_frame_from_event(dep, event); __dwc3_gadget_start_isoc(dep); } -- cgit v1.1 From 1912cbc60f44f0ccc5ae8b90243b9ee304d71d39 Mon Sep 17 00:00:00 2001 From: Felipe Balbi Date: Thu, 29 Mar 2018 11:08:46 +0300 Subject: usb: dwc3: gadget: start removing BUSY flag By now, it has the same semantics as DWC3_EP_TRANSFER_STARTED, but that has a much more descriptive name. Signed-off-by: Felipe Balbi --- drivers/usb/dwc3/gadget.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'drivers/usb') diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c index 6a2d412..643dc71 100644 --- a/drivers/usb/dwc3/gadget.c +++ b/drivers/usb/dwc3/gadget.c @@ -1221,7 +1221,7 @@ static int __dwc3_gadget_kick_transfer(struct dwc3_ep *dep) if (!dwc3_calc_trbs_left(dep)) return 0; - starting = !(dep->flags & DWC3_EP_BUSY); + starting = !(dep->flags & DWC3_EP_TRANSFER_STARTED); dwc3_prepare_trbs(dep); req = next_request(&dep->started_list); @@ -1337,7 +1337,7 @@ static int __dwc3_gadget_ep_queue(struct dwc3_ep *dep, struct dwc3_request *req) return 0; } - if ((dep->flags & DWC3_EP_BUSY) && + if ((dep->flags & DWC3_EP_TRANSFER_STARTED) && !(dep->flags & DWC3_EP_MISSED_ISOC)) goto out; -- cgit v1.1 From 5f2e7975f0dfebd024cdef490d44dc4593d9f778 Mon Sep 17 00:00:00 2001 From: Felipe Balbi Date: Thu, 29 Mar 2018 11:10:45 +0300 Subject: usb: dwc3: gadget: remove DWC3_EP_BUSY flag It has no use anymore. Signed-off-by: Felipe Balbi --- drivers/usb/dwc3/core.h | 3 +-- drivers/usb/dwc3/ep0.c | 5 ++--- drivers/usb/dwc3/gadget.c | 14 ++------------ drivers/usb/dwc3/trace.h | 2 +- 4 files changed, 6 insertions(+), 18 deletions(-) (limited to 'drivers/usb') diff --git a/drivers/usb/dwc3/core.h b/drivers/usb/dwc3/core.h index 9ee77af..310b643 100644 --- a/drivers/usb/dwc3/core.h +++ b/drivers/usb/dwc3/core.h @@ -662,11 +662,10 @@ struct dwc3_ep { #define DWC3_EP_ENABLED BIT(0) #define DWC3_EP_STALL BIT(1) #define DWC3_EP_WEDGE BIT(2) -#define DWC3_EP_BUSY BIT(4) +#define DWC3_EP_TRANSFER_STARTED BIT(3) #define DWC3_EP_PENDING_REQUEST BIT(5) #define DWC3_EP_MISSED_ISOC BIT(6) #define DWC3_EP_END_TRANSFER_PENDING BIT(7) -#define DWC3_EP_TRANSFER_STARTED BIT(8) /* This last one is specific to EP0 */ #define DWC3_EP0_DIR_IN BIT(31) diff --git a/drivers/usb/dwc3/ep0.c b/drivers/usb/dwc3/ep0.c index 5a991bc..826fee2 100644 --- a/drivers/usb/dwc3/ep0.c +++ b/drivers/usb/dwc3/ep0.c @@ -66,7 +66,7 @@ static int dwc3_ep0_start_trans(struct dwc3_ep *dep) struct dwc3 *dwc; int ret; - if (dep->flags & DWC3_EP_BUSY) + if (dep->flags & DWC3_EP_TRANSFER_STARTED) return 0; dwc = dep->dwc; @@ -79,7 +79,6 @@ static int dwc3_ep0_start_trans(struct dwc3_ep *dep) if (ret < 0) return ret; - dep->flags |= DWC3_EP_BUSY; dep->resource_index = dwc3_gadget_ep_get_transfer_index(dep); dwc->ep0_next_event = DWC3_EP0_COMPLETE; @@ -913,7 +912,7 @@ static void dwc3_ep0_xfer_complete(struct dwc3 *dwc, { struct dwc3_ep *dep = dwc->eps[event->endpoint_number]; - dep->flags &= ~DWC3_EP_BUSY; + dep->flags &= ~DWC3_EP_TRANSFER_STARTED; dep->resource_index = 0; dwc->setup_packet_pending = false; diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c index 643dc71..5a9556d 100644 --- a/drivers/usb/dwc3/gadget.c +++ b/drivers/usb/dwc3/gadget.c @@ -691,8 +691,6 @@ static int __dwc3_gadget_ep_enable(struct dwc3_ep *dep, if (ret < 0) return ret; - dep->flags |= DWC3_EP_BUSY; - dep->resource_index = dwc3_gadget_ep_get_transfer_index(dep); WARN_ON_ONCE(!dep->resource_index); } @@ -1257,8 +1255,6 @@ static int __dwc3_gadget_kick_transfer(struct dwc3_ep *dep) return ret; } - dep->flags |= DWC3_EP_BUSY; - if (starting) { dep->resource_index = dwc3_gadget_ep_get_transfer_index(dep); WARN_ON_ONCE(!dep->resource_index); @@ -2389,7 +2385,7 @@ static int dwc3_gadget_ep_cleanup_completed_requests(struct dwc3_ep *dep, /* * Our endpoint might get disabled by another thread during * dwc3_gadget_giveback(). If that happens, we're just gonna return 1 - * early on so DWC3_EP_BUSY flag gets cleared + * early. */ if (!dep->endpoint.desc) return 1; @@ -2432,18 +2428,13 @@ static void dwc3_gadget_endpoint_transfer_in_progress(struct dwc3_ep *dep, { struct dwc3 *dwc = dep->dwc; unsigned status = 0; - int clean_busy; dwc3_gadget_endpoint_frame_from_event(dep, event); if (event->status & DEPEVT_STATUS_BUSERR) status = -ECONNRESET; - clean_busy = dwc3_gadget_ep_cleanup_completed_requests(dep, event, - status); - if (clean_busy && (!dep->endpoint.desc || - usb_endpoint_xfer_isoc(dep->endpoint.desc))) - dep->flags &= ~DWC3_EP_BUSY; + dwc3_gadget_ep_cleanup_completed_requests(dep, event, status); /* * WORKAROUND: This is the 2nd half of U1/U2 -> U0 workaround. @@ -2612,7 +2603,6 @@ static void dwc3_stop_active_transfer(struct dwc3_ep *dep, bool force) ret = dwc3_send_gadget_ep_cmd(dep, cmd, ¶ms); WARN_ON_ONCE(ret); dep->resource_index = 0; - dep->flags &= ~DWC3_EP_BUSY; if (dwc3_is_usb31(dwc) || dwc->revision < DWC3_REVISION_310A) { dep->flags |= DWC3_EP_END_TRANSFER_PENDING; diff --git a/drivers/usb/dwc3/trace.h b/drivers/usb/dwc3/trace.h index 08a6b82..f91461b 100644 --- a/drivers/usb/dwc3/trace.h +++ b/drivers/usb/dwc3/trace.h @@ -311,7 +311,7 @@ DECLARE_EVENT_CLASS(dwc3_log_ep, __entry->flags & DWC3_EP_ENABLED ? 'E' : 'e', __entry->flags & DWC3_EP_STALL ? 'S' : 's', __entry->flags & DWC3_EP_WEDGE ? 'W' : 'w', - __entry->flags & DWC3_EP_BUSY ? 'B' : 'b', + __entry->flags & DWC3_EP_TRANSFER_STARTED ? 'B' : 'b', __entry->flags & DWC3_EP_PENDING_REQUEST ? 'P' : 'p', __entry->flags & DWC3_EP_MISSED_ISOC ? 'M' : 'm', __entry->flags & DWC3_EP_END_TRANSFER_PENDING ? 'E' : 'e', -- cgit v1.1 From 12a3a4ada81635689e2bd926e90131426a5e0a0a Mon Sep 17 00:00:00 2001 From: Felipe Balbi Date: Thu, 29 Mar 2018 11:53:40 +0300 Subject: usb: dwc3: gadget: make cleanup_completed_requests() return nothing We don't need to return a value anymore here. Let's remove it. Signed-off-by: Felipe Balbi --- drivers/usb/dwc3/gadget.c | 13 ++++--------- 1 file changed, 4 insertions(+), 9 deletions(-) (limited to 'drivers/usb') diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c index 5a9556d..fed29ca 100644 --- a/drivers/usb/dwc3/gadget.c +++ b/drivers/usb/dwc3/gadget.c @@ -2307,7 +2307,7 @@ static int dwc3_gadget_ep_reclaim_completed_trb(struct dwc3_ep *dep, return 0; } -static int dwc3_gadget_ep_cleanup_completed_requests(struct dwc3_ep *dep, +static void dwc3_gadget_ep_cleanup_completed_requests(struct dwc3_ep *dep, const struct dwc3_event_depevt *event, int status) { struct dwc3_request *req, *n; @@ -2368,7 +2368,8 @@ static int dwc3_gadget_ep_cleanup_completed_requests(struct dwc3_ep *dep, dev_WARN_ONCE(dep->dwc->dev, (req->request.actual == length), "There are some pending sg's that needs to be queued again\n"); - return __dwc3_gadget_kick_transfer(dep); + __dwc3_gadget_kick_transfer(dep); + return; } } @@ -2388,7 +2389,7 @@ static int dwc3_gadget_ep_cleanup_completed_requests(struct dwc3_ep *dep, * early. */ if (!dep->endpoint.desc) - return 1; + return; if (usb_endpoint_xfer_isoc(dep->endpoint.desc) && list_empty(&dep->started_list)) { @@ -2404,13 +2405,7 @@ static int dwc3_gadget_ep_cleanup_completed_requests(struct dwc3_ep *dep, dwc3_stop_active_transfer(dep, true); dep->flags = DWC3_EP_ENABLED; } - return 1; } - - if (usb_endpoint_xfer_isoc(dep->endpoint.desc) && ioc) - return 0; - - return 1; } static void dwc3_gadget_endpoint_frame_from_event(struct dwc3_ep *dep, -- cgit v1.1 From 58f0218a271d297487aff56b0982a032c8ea35b3 Mon Sep 17 00:00:00 2001 From: Felipe Balbi Date: Thu, 29 Mar 2018 12:10:31 +0300 Subject: usb: dwc3: gadget: remove unnecessary 'ioc' variable It's only written to, never read. We can remove it now. Signed-off-by: Felipe Balbi --- drivers/usb/dwc3/gadget.c | 7 +------ 1 file changed, 1 insertion(+), 6 deletions(-) (limited to 'drivers/usb') diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c index fed29ca..4e2bef9 100644 --- a/drivers/usb/dwc3/gadget.c +++ b/drivers/usb/dwc3/gadget.c @@ -2312,7 +2312,6 @@ static void dwc3_gadget_ep_cleanup_completed_requests(struct dwc3_ep *dep, { struct dwc3_request *req, *n; struct dwc3_trb *trb; - bool ioc = false; int ret = 0; list_for_each_entry_safe(req, n, &dep->started_list, list) { @@ -2375,12 +2374,8 @@ static void dwc3_gadget_ep_cleanup_completed_requests(struct dwc3_ep *dep, dwc3_gadget_giveback(dep, req, status); - if (ret) { - if ((event->status & DEPEVT_STATUS_IOC) && - (trb->ctrl & DWC3_TRB_CTRL_IOC)) - ioc = true; + if (ret) break; - } } /* -- cgit v1.1 From 6d8a019614f3a7630e0a2c1be4bf1cfc23acf56e Mon Sep 17 00:00:00 2001 From: Felipe Balbi Date: Thu, 29 Mar 2018 12:49:28 +0300 Subject: usb: dwc3: gadget: check for Missed Isoc from event status In case we get an event with status set to Missed Isoc, this means we have missed an isochronous interval and should issue End Transfer command and wait for the following XferNotReady. Let's do that early, rather than late. Signed-off-by: Felipe Balbi --- drivers/usb/dwc3/core.h | 5 +++-- drivers/usb/dwc3/gadget.c | 14 +++++++++++--- 2 files changed, 14 insertions(+), 5 deletions(-) (limited to 'drivers/usb') diff --git a/drivers/usb/dwc3/core.h b/drivers/usb/dwc3/core.h index 310b643..499e086 100644 --- a/drivers/usb/dwc3/core.h +++ b/drivers/usb/dwc3/core.h @@ -1204,11 +1204,12 @@ struct dwc3_event_depevt { /* Within XferNotReady */ #define DEPEVT_STATUS_TRANSFER_ACTIVE BIT(3) -/* Within XferComplete */ +/* Within XferComplete or XferInProgress */ #define DEPEVT_STATUS_BUSERR BIT(0) #define DEPEVT_STATUS_SHORT BIT(1) #define DEPEVT_STATUS_IOC BIT(2) -#define DEPEVT_STATUS_LST BIT(3) +#define DEPEVT_STATUS_LST BIT(3) /* XferComplete */ +#define DEPEVT_STATUS_MISSED_ISOC BIT(3) /* XferInProgress */ /* Stream event only */ #define DEPEVT_STREAMEVT_FOUND 1 diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c index 4e2bef9..d378f3e 100644 --- a/drivers/usb/dwc3/gadget.c +++ b/drivers/usb/dwc3/gadget.c @@ -2396,9 +2396,6 @@ static void dwc3_gadget_ep_cleanup_completed_requests(struct dwc3_ep *dep, * entry is added into request list. */ dep->flags = DWC3_EP_PENDING_REQUEST; - } else { - dwc3_stop_active_transfer(dep, true); - dep->flags = DWC3_EP_ENABLED; } } } @@ -2418,14 +2415,25 @@ static void dwc3_gadget_endpoint_transfer_in_progress(struct dwc3_ep *dep, { struct dwc3 *dwc = dep->dwc; unsigned status = 0; + bool stop = false; dwc3_gadget_endpoint_frame_from_event(dep, event); if (event->status & DEPEVT_STATUS_BUSERR) status = -ECONNRESET; + if (event->status & DEPEVT_STATUS_MISSED_ISOC) { + status = -EXDEV; + stop = true; + } + dwc3_gadget_ep_cleanup_completed_requests(dep, event, status); + if (stop) { + dwc3_stop_active_transfer(dep, true); + dep->flags = DWC3_EP_ENABLED; + } + /* * WORKAROUND: This is the 2nd half of U1/U2 -> U0 workaround. * See dwc3_gadget_linksts_change_interrupt() for 1st half. -- cgit v1.1 From 4d588a145b3e5e096804b71714db6a8bb82e8f49 Mon Sep 17 00:00:00 2001 From: Felipe Balbi Date: Thu, 29 Mar 2018 13:07:16 +0300 Subject: usb: dwc3: gadget: remove duplicated missed isoc handling Now, this part of the code is duplicated and brings no extra value to the driver. Let's remove it. Signed-off-by: Felipe Balbi --- drivers/usb/dwc3/core.h | 1 - drivers/usb/dwc3/gadget.c | 34 ++-------------------------------- drivers/usb/dwc3/trace.h | 3 +-- 3 files changed, 3 insertions(+), 35 deletions(-) (limited to 'drivers/usb') diff --git a/drivers/usb/dwc3/core.h b/drivers/usb/dwc3/core.h index 499e086..285ce0e 100644 --- a/drivers/usb/dwc3/core.h +++ b/drivers/usb/dwc3/core.h @@ -664,7 +664,6 @@ struct dwc3_ep { #define DWC3_EP_WEDGE BIT(2) #define DWC3_EP_TRANSFER_STARTED BIT(3) #define DWC3_EP_PENDING_REQUEST BIT(5) -#define DWC3_EP_MISSED_ISOC BIT(6) #define DWC3_EP_END_TRANSFER_PENDING BIT(7) /* This last one is specific to EP0 */ diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c index d378f3e..452f76e 100644 --- a/drivers/usb/dwc3/gadget.c +++ b/drivers/usb/dwc3/gadget.c @@ -1333,8 +1333,7 @@ static int __dwc3_gadget_ep_queue(struct dwc3_ep *dep, struct dwc3_request *req) return 0; } - if ((dep->flags & DWC3_EP_TRANSFER_STARTED) && - !(dep->flags & DWC3_EP_MISSED_ISOC)) + if (dep->flags & DWC3_EP_TRANSFER_STARTED) goto out; return 0; @@ -2229,7 +2228,6 @@ static int dwc3_gadget_ep_reclaim_completed_trb(struct dwc3_ep *dep, { unsigned int count; unsigned int s_pkt = 0; - unsigned int trb_status; dwc3_ep_inc_deq(dep); @@ -2264,35 +2262,7 @@ static int dwc3_gadget_ep_reclaim_completed_trb(struct dwc3_ep *dep, if ((trb->ctrl & DWC3_TRB_CTRL_HWO) && status != -ESHUTDOWN) return 1; - if (dep->direction) { - if (count) { - trb_status = DWC3_TRB_SIZE_TRBSTS(trb->size); - if (trb_status == DWC3_TRBSTS_MISSED_ISOC) { - /* - * If missed isoc occurred and there is - * no request queued then issue END - * TRANSFER, so that core generates - * next xfernotready and we will issue - * a fresh START TRANSFER. - * If there are still queued request - * then wait, do not issue either END - * or UPDATE TRANSFER, just attach next - * request in pending_list during - * giveback.If any future queued request - * is successfully transferred then we - * will issue UPDATE TRANSFER for all - * request in the pending_list. - */ - dep->flags |= DWC3_EP_MISSED_ISOC; - } else { - dev_err(dep->dwc->dev, "incomplete IN transfer %s\n", - dep->name); - status = -ECONNRESET; - } - } else { - dep->flags &= ~DWC3_EP_MISSED_ISOC; - } - } else { + if (!dep->direction) { if (count && (event->status & DEPEVT_STATUS_SHORT)) s_pkt = 1; } diff --git a/drivers/usb/dwc3/trace.h b/drivers/usb/dwc3/trace.h index f91461b..f22714c 100644 --- a/drivers/usb/dwc3/trace.h +++ b/drivers/usb/dwc3/trace.h @@ -303,7 +303,7 @@ DECLARE_EVENT_CLASS(dwc3_log_ep, __entry->trb_enqueue = dep->trb_enqueue; __entry->trb_dequeue = dep->trb_dequeue; ), - TP_printk("%s: mps %d/%d streams %d burst %d ring %d/%d flags %c:%c%c%c%c%c:%c:%c", + TP_printk("%s: mps %d/%d streams %d burst %d ring %d/%d flags %c:%c%c%c%c:%c:%c", __get_str(name), __entry->maxpacket, __entry->maxpacket_limit, __entry->max_streams, __entry->maxburst, __entry->trb_enqueue, @@ -313,7 +313,6 @@ DECLARE_EVENT_CLASS(dwc3_log_ep, __entry->flags & DWC3_EP_WEDGE ? 'W' : 'w', __entry->flags & DWC3_EP_TRANSFER_STARTED ? 'B' : 'b', __entry->flags & DWC3_EP_PENDING_REQUEST ? 'P' : 'p', - __entry->flags & DWC3_EP_MISSED_ISOC ? 'M' : 'm', __entry->flags & DWC3_EP_END_TRANSFER_PENDING ? 'E' : 'e', __entry->direction ? '<' : '>' ) -- cgit v1.1 From fe990cea8ed5563af1f3e646d2d06c6c93c0399d Mon Sep 17 00:00:00 2001 From: Felipe Balbi Date: Thu, 29 Mar 2018 13:23:53 +0300 Subject: usb: dwc3: gadget: simplify queueing of isoc transfers After all the previous changes, it's now a lot clearer how isoc transfers should be managed. We don't need to try to End Transfers from ep_queue since that's already done by cleanup_requests. Signed-off-by: Felipe Balbi --- drivers/usb/dwc3/gadget.c | 18 ++++++------------ 1 file changed, 6 insertions(+), 12 deletions(-) (limited to 'drivers/usb') diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c index 452f76e..ffa84e0 100644 --- a/drivers/usb/dwc3/gadget.c +++ b/drivers/usb/dwc3/gadget.c @@ -1322,24 +1322,18 @@ static int __dwc3_gadget_ep_queue(struct dwc3_ep *dep, struct dwc3_request *req) * errors which will force us issue EndTransfer command. */ if (usb_endpoint_xfer_isoc(dep->endpoint.desc)) { + if (!(dep->flags & DWC3_EP_PENDING_REQUEST) && + !(dep->flags & DWC3_EP_TRANSFER_STARTED)) + return 0; + if ((dep->flags & DWC3_EP_PENDING_REQUEST)) { - if (dep->flags & DWC3_EP_TRANSFER_STARTED) { - dwc3_stop_active_transfer(dep, true); - dep->flags = DWC3_EP_ENABLED; - } else { + if (!(dep->flags & DWC3_EP_TRANSFER_STARTED)) { __dwc3_gadget_start_isoc(dep); - dep->flags &= ~DWC3_EP_PENDING_REQUEST; + return 0; } - return 0; } - - if (dep->flags & DWC3_EP_TRANSFER_STARTED) - goto out; - - return 0; } -out: return __dwc3_gadget_kick_transfer(dep); } -- cgit v1.1 From d5044a04b5292d3ac6c837af70d632a7d593f6db Mon Sep 17 00:00:00 2001 From: Felipe Balbi Date: Thu, 29 Mar 2018 13:25:40 +0300 Subject: usb: dwc3: gadget: simplify isoc case on cleanup_completed_requests Just a minor simplification, no functional changes. Signed-off-by: Felipe Balbi --- drivers/usb/dwc3/gadget.c | 13 +++---------- 1 file changed, 3 insertions(+), 10 deletions(-) (limited to 'drivers/usb') diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c index ffa84e0..2c79563 100644 --- a/drivers/usb/dwc3/gadget.c +++ b/drivers/usb/dwc3/gadget.c @@ -2351,16 +2351,9 @@ static void dwc3_gadget_ep_cleanup_completed_requests(struct dwc3_ep *dep, return; if (usb_endpoint_xfer_isoc(dep->endpoint.desc) && - list_empty(&dep->started_list)) { - if (list_empty(&dep->pending_list)) { - /* - * If there is no entry in request list then do - * not issue END TRANSFER now. Just set PENDING - * flag, so that END TRANSFER is issued when an - * entry is added into request list. - */ - dep->flags = DWC3_EP_PENDING_REQUEST; - } + list_empty(&dep->started_list) && + list_empty(&dep->pending_list)) { + dep->flags = DWC3_EP_PENDING_REQUEST; } } -- cgit v1.1 From d36929538f8b02615260075a9c512bddd75fea4e Mon Sep 17 00:00:00 2001 From: Felipe Balbi Date: Thu, 29 Mar 2018 13:32:10 +0300 Subject: usb: dwc3: gadget: split scatterlist and linear handlers instead of having one big loop, let's split it down into two smaller handlers: one for linear buffers and one for scatterlist. Signed-off-by: Felipe Balbi --- drivers/usb/dwc3/gadget.c | 71 ++++++++++++++++++++++++++++++----------------- 1 file changed, 45 insertions(+), 26 deletions(-) (limited to 'drivers/usb') diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c index 2c79563..b0b72e7 100644 --- a/drivers/usb/dwc3/gadget.c +++ b/drivers/usb/dwc3/gadget.c @@ -2271,6 +2271,45 @@ static int dwc3_gadget_ep_reclaim_completed_trb(struct dwc3_ep *dep, return 0; } +static int dwc3_gadget_ep_reclaim_trb_sg(struct dwc3_ep *dep, + struct dwc3_request *req, const struct dwc3_event_depevt *event, + int status) +{ + struct dwc3_trb *trb = &dep->trb_pool[dep->trb_dequeue]; + struct scatterlist *sg = req->sg; + struct scatterlist *s; + unsigned int pending = req->num_pending_sgs; + unsigned int i; + int ret = 0; + + for_each_sg(sg, s, pending, i) { + trb = &dep->trb_pool[dep->trb_dequeue]; + + if (trb->ctrl & DWC3_TRB_CTRL_HWO) + break; + + req->sg = sg_next(s); + req->num_pending_sgs--; + + ret = dwc3_gadget_ep_reclaim_completed_trb(dep, req, + trb, event, status, true); + if (ret) + break; + } + + return ret; +} + +static int dwc3_gadget_ep_reclaim_trb_linear(struct dwc3_ep *dep, + struct dwc3_request *req, const struct dwc3_event_depevt *event, + int status) +{ + struct dwc3_trb *trb = &dep->trb_pool[dep->trb_dequeue]; + + return dwc3_gadget_ep_reclaim_completed_trb(dep, req, trb, + event, status, false); +} + static void dwc3_gadget_ep_cleanup_completed_requests(struct dwc3_ep *dep, const struct dwc3_event_depevt *event, int status) { @@ -2284,32 +2323,12 @@ static void dwc3_gadget_ep_cleanup_completed_requests(struct dwc3_ep *dep, length = req->request.length; chain = req->num_pending_sgs > 0; - if (chain) { - struct scatterlist *sg = req->sg; - struct scatterlist *s; - unsigned int pending = req->num_pending_sgs; - unsigned int i; - - for_each_sg(sg, s, pending, i) { - trb = &dep->trb_pool[dep->trb_dequeue]; - - if (trb->ctrl & DWC3_TRB_CTRL_HWO) - break; - - req->sg = sg_next(s); - req->num_pending_sgs--; - - ret = dwc3_gadget_ep_reclaim_completed_trb(dep, - req, trb, event, status, - chain); - if (ret) - break; - } - } else { - trb = &dep->trb_pool[dep->trb_dequeue]; - ret = dwc3_gadget_ep_reclaim_completed_trb(dep, req, - trb, event, status, chain); - } + if (chain) + ret = dwc3_gadget_ep_reclaim_trb_sg(dep, req, event, + status); + else + ret = dwc3_gadget_ep_reclaim_trb_linear(dep, req, event, + status); if (req->unaligned || req->zero) { trb = &dep->trb_pool[dep->trb_dequeue]; -- cgit v1.1 From 021595963a3c3cb233f614ed600565e1b80ab684 Mon Sep 17 00:00:00 2001 From: Felipe Balbi Date: Thu, 29 Mar 2018 14:02:41 +0300 Subject: usb: dwc3: gadget: remove PENDING handling from cleanup_completed We are trying to kick transfers on Isochronous endpoints in a more controlled manner now. And this ended up rendering this piece of code unnecessary. Signed-off-by: Felipe Balbi --- drivers/usb/dwc3/gadget.c | 14 -------------- 1 file changed, 14 deletions(-) (limited to 'drivers/usb') diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c index b0b72e7..7a95866 100644 --- a/drivers/usb/dwc3/gadget.c +++ b/drivers/usb/dwc3/gadget.c @@ -2360,20 +2360,6 @@ static void dwc3_gadget_ep_cleanup_completed_requests(struct dwc3_ep *dep, if (ret) break; } - - /* - * Our endpoint might get disabled by another thread during - * dwc3_gadget_giveback(). If that happens, we're just gonna return 1 - * early. - */ - if (!dep->endpoint.desc) - return; - - if (usb_endpoint_xfer_isoc(dep->endpoint.desc) && - list_empty(&dep->started_list) && - list_empty(&dep->pending_list)) { - dep->flags = DWC3_EP_PENDING_REQUEST; - } } static void dwc3_gadget_endpoint_frame_from_event(struct dwc3_ep *dep, -- cgit v1.1 From cf35fc336e668fcac6dc981eac9f7646859ba601 Mon Sep 17 00:00:00 2001 From: Felipe Balbi Date: Thu, 29 Mar 2018 14:49:36 +0300 Subject: usb: dwc3: gadget: remove unnecessary 'chain' variable Minor cleanup, no functional changes. Signed-off-by: Felipe Balbi --- drivers/usb/dwc3/gadget.c | 4 +--- 1 file changed, 1 insertion(+), 3 deletions(-) (limited to 'drivers/usb') diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c index 7a95866..baf8913 100644 --- a/drivers/usb/dwc3/gadget.c +++ b/drivers/usb/dwc3/gadget.c @@ -2319,11 +2319,9 @@ static void dwc3_gadget_ep_cleanup_completed_requests(struct dwc3_ep *dep, list_for_each_entry_safe(req, n, &dep->started_list, list) { unsigned length; - int chain; length = req->request.length; - chain = req->num_pending_sgs > 0; - if (chain) + if (req->num_pending_sgs) ret = dwc3_gadget_ep_reclaim_trb_sg(dep, req, event, status); else -- cgit v1.1 From 8b3b7b66c0e63813f611f7f70a6c4e7efafedae8 Mon Sep 17 00:00:00 2001 From: Felipe Balbi Date: Thu, 29 Mar 2018 15:30:44 +0300 Subject: usb: dwc3: gadget: simplify unaligned and zlp handling We can just call reclaim_trb_linear instead of reimplementing it. Signed-off-by: Felipe Balbi --- drivers/usb/dwc3/gadget.c | 6 ++---- 1 file changed, 2 insertions(+), 4 deletions(-) (limited to 'drivers/usb') diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c index baf8913..7fa8b15 100644 --- a/drivers/usb/dwc3/gadget.c +++ b/drivers/usb/dwc3/gadget.c @@ -2314,7 +2314,6 @@ static void dwc3_gadget_ep_cleanup_completed_requests(struct dwc3_ep *dep, const struct dwc3_event_depevt *event, int status) { struct dwc3_request *req, *n; - struct dwc3_trb *trb; int ret = 0; list_for_each_entry_safe(req, n, &dep->started_list, list) { @@ -2329,9 +2328,8 @@ static void dwc3_gadget_ep_cleanup_completed_requests(struct dwc3_ep *dep, status); if (req->unaligned || req->zero) { - trb = &dep->trb_pool[dep->trb_dequeue]; - ret = dwc3_gadget_ep_reclaim_completed_trb(dep, req, - trb, event, status, false); + ret = dwc3_gadget_ep_reclaim_trb_linear(dep, req, event, + status); req->unaligned = false; req->zero = false; } -- cgit v1.1 From b27972b508d113b8fcfb04a2520915111b431bb2 Mon Sep 17 00:00:00 2001 From: Felipe Balbi Date: Fri, 6 Apr 2018 11:03:19 +0300 Subject: usb: dwc3: trace: print out event status too This will make it easier to figure out the reason for the event. That information really helps debugging certain problems. Signed-off-by: Felipe Balbi --- drivers/usb/dwc3/debug.h | 20 ++++++++++++++++---- 1 file changed, 16 insertions(+), 4 deletions(-) (limited to 'drivers/usb') diff --git a/drivers/usb/dwc3/debug.h b/drivers/usb/dwc3/debug.h index bfb90c5..0be6a55 100644 --- a/drivers/usb/dwc3/debug.h +++ b/drivers/usb/dwc3/debug.h @@ -475,21 +475,33 @@ dwc3_ep_event_string(char *str, const struct dwc3_event_depevt *event, if (ret < 0) return "UNKNOWN"; + status = event->status; + switch (event->endpoint_event) { case DWC3_DEPEVT_XFERCOMPLETE: - strcat(str, "Transfer Complete"); + len = strlen(str); + sprintf(str + len, "Transfer Complete (%c%c%c)", + status & DEPEVT_STATUS_SHORT ? 'S' : 's', + status & DEPEVT_STATUS_IOC ? 'I' : 'i', + status & DEPEVT_STATUS_LST ? 'L' : 'l'); + len = strlen(str); if (epnum <= 1) sprintf(str + len, " [%s]", dwc3_ep0_state_string(ep0state)); break; case DWC3_DEPEVT_XFERINPROGRESS: - strcat(str, "Transfer In-Progress"); + len = strlen(str); + + sprintf(str + len, "Transfer In Progress (%c%c%c)", + status & DEPEVT_STATUS_SHORT ? 'S' : 's', + status & DEPEVT_STATUS_IOC ? 'I' : 'i', + status & DEPEVT_STATUS_LST ? 'M' : 'm'); break; case DWC3_DEPEVT_XFERNOTREADY: strcat(str, "Transfer Not Ready"); - status = event->status & DEPEVT_STATUS_TRANSFER_ACTIVE; - strcat(str, status ? " (Active)" : " (Not Active)"); + strcat(str, status & DEPEVT_STATUS_TRANSFER_ACTIVE ? + " (Active)" : " (Not Active)"); /* Control Endpoints */ if (epnum <= 1) { -- cgit v1.1 From d80fe1b6e34d39ded5718f9433350c0d823c21d6 Mon Sep 17 00:00:00 2001 From: Felipe Balbi Date: Fri, 6 Apr 2018 11:04:21 +0300 Subject: usb: dwc3: gadget: simplify short packet event We know that only OUT endpoints can trigger SHORT. We also know that count MUST be > 0 whenever SHORT triggers. Signed-off-by: Felipe Balbi --- drivers/usb/dwc3/gadget.c | 8 +------- 1 file changed, 1 insertion(+), 7 deletions(-) (limited to 'drivers/usb') diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c index 7fa8b15..752d615 100644 --- a/drivers/usb/dwc3/gadget.c +++ b/drivers/usb/dwc3/gadget.c @@ -2221,7 +2221,6 @@ static int dwc3_gadget_ep_reclaim_completed_trb(struct dwc3_ep *dep, const struct dwc3_event_depevt *event, int status, int chain) { unsigned int count; - unsigned int s_pkt = 0; dwc3_ep_inc_deq(dep); @@ -2256,12 +2255,7 @@ static int dwc3_gadget_ep_reclaim_completed_trb(struct dwc3_ep *dep, if ((trb->ctrl & DWC3_TRB_CTRL_HWO) && status != -ESHUTDOWN) return 1; - if (!dep->direction) { - if (count && (event->status & DEPEVT_STATUS_SHORT)) - s_pkt = 1; - } - - if (s_pkt && !chain) + if (event->status & DEPEVT_STATUS_SHORT && !chain) return 1; if ((event->status & DEPEVT_STATUS_IOC) && -- cgit v1.1 From e0c42ce590fe331ab78368c6edc6cc8701e2aece Mon Sep 17 00:00:00 2001 From: Felipe Balbi Date: Fri, 6 Apr 2018 15:37:30 +0300 Subject: usb: dwc3: gadget: simplify IOC handling We will only have event status of IOC when IOC bit is set in TRB. There's no need to check both bits. Signed-off-by: Felipe Balbi --- drivers/usb/dwc3/gadget.c | 25 ++++++++++--------------- 1 file changed, 10 insertions(+), 15 deletions(-) (limited to 'drivers/usb') diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c index 752d615..53fce66 100644 --- a/drivers/usb/dwc3/gadget.c +++ b/drivers/usb/dwc3/gadget.c @@ -2258,8 +2258,7 @@ static int dwc3_gadget_ep_reclaim_completed_trb(struct dwc3_ep *dep, if (event->status & DEPEVT_STATUS_SHORT && !chain) return 1; - if ((event->status & DEPEVT_STATUS_IOC) && - (trb->ctrl & DWC3_TRB_CTRL_IOC)) + if (event->status & DEPEVT_STATUS_IOC) return 1; return 0; @@ -2304,6 +2303,11 @@ static int dwc3_gadget_ep_reclaim_trb_linear(struct dwc3_ep *dep, event, status, false); } +static bool dwc3_gadget_ep_request_completed(struct dwc3_request *req) +{ + return req->request.actual == req->request.length; +} + static void dwc3_gadget_ep_cleanup_completed_requests(struct dwc3_ep *dep, const struct dwc3_event_depevt *event, int status) { @@ -2330,19 +2334,10 @@ static void dwc3_gadget_ep_cleanup_completed_requests(struct dwc3_ep *dep, req->request.actual = length - req->remaining; - if (req->request.actual < length || req->num_pending_sgs) { - /* - * There could be a scenario where the whole req can't - * be mapped into available TRB's. In that case, we need - * to kick transfer again if (req->num_pending_sgs > 0) - */ - if (req->num_pending_sgs) { - dev_WARN_ONCE(dep->dwc->dev, - (req->request.actual == length), - "There are some pending sg's that needs to be queued again\n"); - __dwc3_gadget_kick_transfer(dep); - return; - } + if (!dwc3_gadget_ep_request_completed(req) || + req->num_pending_sgs) { + __dwc3_gadget_kick_transfer(dep); + break; } dwc3_gadget_giveback(dep, req, status); -- cgit v1.1 From 6afbdb57732bc9617078e9a566eafa5f542a5c28 Mon Sep 17 00:00:00 2001 From: Felipe Balbi Date: Fri, 6 Apr 2018 15:49:49 +0300 Subject: usb: dwc3: gadget: one declaration per line Misc cleanup. No functional changes. Signed-off-by: Felipe Balbi --- drivers/usb/dwc3/gadget.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) (limited to 'drivers/usb') diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c index 53fce66..e230b0a 100644 --- a/drivers/usb/dwc3/gadget.c +++ b/drivers/usb/dwc3/gadget.c @@ -2311,10 +2311,11 @@ static bool dwc3_gadget_ep_request_completed(struct dwc3_request *req) static void dwc3_gadget_ep_cleanup_completed_requests(struct dwc3_ep *dep, const struct dwc3_event_depevt *event, int status) { - struct dwc3_request *req, *n; + struct dwc3_request *req; + struct dwc3_request *tmp; int ret = 0; - list_for_each_entry_safe(req, n, &dep->started_list, list) { + list_for_each_entry_safe(req, tmp, &dep->started_list, list) { unsigned length; length = req->request.length; -- cgit v1.1 From fee73e6144d8a0399d17f9ca3b7e5121057eab2d Mon Sep 17 00:00:00 2001 From: Felipe Balbi Date: Fri, 6 Apr 2018 15:50:29 +0300 Subject: usb: dwc3: gadget: reduce scope of ret variable We can declare it inside list_for_each_entry_safe() loop and reduce its scope. Signed-off-by: Felipe Balbi --- drivers/usb/dwc3/gadget.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers/usb') diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c index e230b0a..263f950 100644 --- a/drivers/usb/dwc3/gadget.c +++ b/drivers/usb/dwc3/gadget.c @@ -2313,10 +2313,10 @@ static void dwc3_gadget_ep_cleanup_completed_requests(struct dwc3_ep *dep, { struct dwc3_request *req; struct dwc3_request *tmp; - int ret = 0; list_for_each_entry_safe(req, tmp, &dep->started_list, list) { unsigned length; + int ret; length = req->request.length; if (req->num_pending_sgs) -- cgit v1.1 From 6d9d22dac114c35f794cf28104cbc5af7acc8232 Mon Sep 17 00:00:00 2001 From: Felipe Balbi Date: Fri, 6 Apr 2018 15:51:49 +0300 Subject: usb: dwc3: gadget: get rid of the length variable Code is just as readable without it. Signed-off-by: Felipe Balbi --- drivers/usb/dwc3/gadget.c | 4 +--- 1 file changed, 1 insertion(+), 3 deletions(-) (limited to 'drivers/usb') diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c index 263f950..a4ba5d3 100644 --- a/drivers/usb/dwc3/gadget.c +++ b/drivers/usb/dwc3/gadget.c @@ -2315,10 +2315,8 @@ static void dwc3_gadget_ep_cleanup_completed_requests(struct dwc3_ep *dep, struct dwc3_request *tmp; list_for_each_entry_safe(req, tmp, &dep->started_list, list) { - unsigned length; int ret; - length = req->request.length; if (req->num_pending_sgs) ret = dwc3_gadget_ep_reclaim_trb_sg(dep, req, event, status); @@ -2333,7 +2331,7 @@ static void dwc3_gadget_ep_cleanup_completed_requests(struct dwc3_ep *dep, req->zero = false; } - req->request.actual = length - req->remaining; + req->request.actual = req->request.length - req->remaining; if (!dwc3_gadget_ep_request_completed(req) || req->num_pending_sgs) { -- cgit v1.1 From f38e35dd84e2eee9c1dfadba90db3855da2b1116 Mon Sep 17 00:00:00 2001 From: Felipe Balbi Date: Fri, 6 Apr 2018 15:56:35 +0300 Subject: usb: dwc3: gadget: split dwc3_gadget_ep_cleanup_completed_requests() No functional changes, it just makes the code slightly easier to read. Signed-off-by: Felipe Balbi --- drivers/usb/dwc3/gadget.c | 60 ++++++++++++++++++++++++++++------------------- 1 file changed, 36 insertions(+), 24 deletions(-) (limited to 'drivers/usb') diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c index a4ba5d3..bdd1d61 100644 --- a/drivers/usb/dwc3/gadget.c +++ b/drivers/usb/dwc3/gadget.c @@ -2308,6 +2308,40 @@ static bool dwc3_gadget_ep_request_completed(struct dwc3_request *req) return req->request.actual == req->request.length; } +static int dwc3_gadget_ep_cleanup_completed_request(struct dwc3_ep *dep, + const struct dwc3_event_depevt *event, + struct dwc3_request *req, int status) +{ + int ret; + + if (req->num_pending_sgs) + ret = dwc3_gadget_ep_reclaim_trb_sg(dep, req, event, + status); + else + ret = dwc3_gadget_ep_reclaim_trb_linear(dep, req, event, + status); + + if (req->unaligned || req->zero) { + ret = dwc3_gadget_ep_reclaim_trb_linear(dep, req, event, + status); + req->unaligned = false; + req->zero = false; + } + + req->request.actual = req->request.length - req->remaining; + + if (!dwc3_gadget_ep_request_completed(req) && + req->num_pending_sgs) { + __dwc3_gadget_kick_transfer(dep); + goto out; + } + + dwc3_gadget_giveback(dep, req, status); + +out: + return ret; +} + static void dwc3_gadget_ep_cleanup_completed_requests(struct dwc3_ep *dep, const struct dwc3_event_depevt *event, int status) { @@ -2317,30 +2351,8 @@ static void dwc3_gadget_ep_cleanup_completed_requests(struct dwc3_ep *dep, list_for_each_entry_safe(req, tmp, &dep->started_list, list) { int ret; - if (req->num_pending_sgs) - ret = dwc3_gadget_ep_reclaim_trb_sg(dep, req, event, - status); - else - ret = dwc3_gadget_ep_reclaim_trb_linear(dep, req, event, - status); - - if (req->unaligned || req->zero) { - ret = dwc3_gadget_ep_reclaim_trb_linear(dep, req, event, - status); - req->unaligned = false; - req->zero = false; - } - - req->request.actual = req->request.length - req->remaining; - - if (!dwc3_gadget_ep_request_completed(req) || - req->num_pending_sgs) { - __dwc3_gadget_kick_transfer(dep); - break; - } - - dwc3_gadget_giveback(dep, req, status); - + ret = dwc3_gadget_ep_cleanup_completed_request(dep, event, + req, status); if (ret) break; } -- cgit v1.1 From 8f1c99cd24b01825fbd727efa75599b98432adc8 Mon Sep 17 00:00:00 2001 From: Felipe Balbi Date: Mon, 9 Apr 2018 11:06:09 +0300 Subject: usb: dwc3: gadget: refactor dwc3_gadget_init_endpoints() This just makes it slightly easier to read. No functional changes. Signed-off-by: Felipe Balbi --- drivers/usb/dwc3/gadget.c | 203 ++++++++++++++++++++++++++-------------------- 1 file changed, 116 insertions(+), 87 deletions(-) (limited to 'drivers/usb') diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c index bdd1d61..4518e85 100644 --- a/drivers/usb/dwc3/gadget.c +++ b/drivers/usb/dwc3/gadget.c @@ -2075,113 +2075,142 @@ static const struct usb_gadget_ops dwc3_gadget_ops = { /* -------------------------------------------------------------------------- */ -static int dwc3_gadget_init_endpoints(struct dwc3 *dwc, u8 total) +static int dwc3_gadget_init_control_endpoint(struct dwc3_ep *dep) { - struct dwc3_ep *dep; - u8 epnum; + struct dwc3 *dwc = dep->dwc; - INIT_LIST_HEAD(&dwc->gadget.ep_list); + usb_ep_set_maxpacket_limit(&dep->endpoint, 512); + dep->endpoint.maxburst = 1; + dep->endpoint.ops = &dwc3_gadget_ep0_ops; + if (!dep->direction) + dwc->gadget.ep0 = &dep->endpoint; - for (epnum = 0; epnum < total; epnum++) { - bool direction = epnum & 1; - u8 num = epnum >> 1; + dep->endpoint.caps.type_control = true; - dep = kzalloc(sizeof(*dep), GFP_KERNEL); - if (!dep) - return -ENOMEM; + return 0; +} - dep->dwc = dwc; - dep->number = epnum; - dep->direction = direction; - dep->regs = dwc->regs + DWC3_DEP_BASE(epnum); - dwc->eps[epnum] = dep; +static int dwc3_gadget_init_in_endpoint(struct dwc3_ep *dep) +{ + struct dwc3 *dwc = dep->dwc; + int mdwidth; + int kbytes; + int size; - snprintf(dep->name, sizeof(dep->name), "ep%u%s", num, - direction ? "in" : "out"); + mdwidth = DWC3_MDWIDTH(dwc->hwparams.hwparams0); + /* MDWIDTH is represented in bits, we need it in bytes */ + mdwidth /= 8; - dep->endpoint.name = dep->name; + size = dwc3_readl(dwc->regs, DWC3_GTXFIFOSIZ(dep->number >> 1)); + if (dwc3_is_usb31(dwc)) + size = DWC31_GTXFIFOSIZ_TXFDEF(size); + else + size = DWC3_GTXFIFOSIZ_TXFDEF(size); - if (!(dep->number > 1)) { - dep->endpoint.desc = &dwc3_gadget_ep0_desc; - dep->endpoint.comp_desc = NULL; - } + /* FIFO Depth is in MDWDITH bytes. Multiply */ + size *= mdwidth; - spin_lock_init(&dep->lock); - - if (num == 0) { - usb_ep_set_maxpacket_limit(&dep->endpoint, 512); - dep->endpoint.maxburst = 1; - dep->endpoint.ops = &dwc3_gadget_ep0_ops; - if (!direction) - dwc->gadget.ep0 = &dep->endpoint; - } else if (direction) { - int mdwidth; - int kbytes; - int size; - int ret; - - mdwidth = DWC3_MDWIDTH(dwc->hwparams.hwparams0); - /* MDWIDTH is represented in bits, we need it in bytes */ - mdwidth /= 8; - - size = dwc3_readl(dwc->regs, DWC3_GTXFIFOSIZ(num)); - if (dwc3_is_usb31(dwc)) - size = DWC31_GTXFIFOSIZ_TXFDEF(size); - else - size = DWC3_GTXFIFOSIZ_TXFDEF(size); + kbytes = size / 1024; + if (kbytes == 0) + kbytes = 1; - /* FIFO Depth is in MDWDITH bytes. Multiply */ - size *= mdwidth; + /* + * FIFO sizes account an extra MDWIDTH * (kbytes + 1) bytes for + * internal overhead. We don't really know how these are used, + * but documentation say it exists. + */ + size -= mdwidth * (kbytes + 1); + size /= kbytes; - kbytes = size / 1024; - if (kbytes == 0) - kbytes = 1; + usb_ep_set_maxpacket_limit(&dep->endpoint, size); - /* - * FIFO sizes account an extra MDWIDTH * (kbytes + 1) bytes for - * internal overhead. We don't really know how these are used, - * but documentation say it exists. - */ - size -= mdwidth * (kbytes + 1); - size /= kbytes; + dep->endpoint.max_streams = 15; + dep->endpoint.ops = &dwc3_gadget_ep_ops; + list_add_tail(&dep->endpoint.ep_list, + &dwc->gadget.ep_list); + dep->endpoint.caps.type_iso = true; + dep->endpoint.caps.type_bulk = true; + dep->endpoint.caps.type_int = true; - usb_ep_set_maxpacket_limit(&dep->endpoint, size); + return dwc3_alloc_trb_pool(dep); +} - dep->endpoint.max_streams = 15; - dep->endpoint.ops = &dwc3_gadget_ep_ops; - list_add_tail(&dep->endpoint.ep_list, - &dwc->gadget.ep_list); +static int dwc3_gadget_init_out_endpoint(struct dwc3_ep *dep) +{ + struct dwc3 *dwc = dep->dwc; - ret = dwc3_alloc_trb_pool(dep); - if (ret) - return ret; - } else { - int ret; + usb_ep_set_maxpacket_limit(&dep->endpoint, 1024); + dep->endpoint.max_streams = 15; + dep->endpoint.ops = &dwc3_gadget_ep_ops; + list_add_tail(&dep->endpoint.ep_list, + &dwc->gadget.ep_list); + dep->endpoint.caps.type_iso = true; + dep->endpoint.caps.type_bulk = true; + dep->endpoint.caps.type_int = true; - usb_ep_set_maxpacket_limit(&dep->endpoint, 1024); - dep->endpoint.max_streams = 15; - dep->endpoint.ops = &dwc3_gadget_ep_ops; - list_add_tail(&dep->endpoint.ep_list, - &dwc->gadget.ep_list); + return dwc3_alloc_trb_pool(dep); +} - ret = dwc3_alloc_trb_pool(dep); - if (ret) - return ret; - } +static int dwc3_gadget_init_endpoint(struct dwc3 *dwc, u8 epnum) +{ + struct dwc3_ep *dep; + bool direction = epnum & 1; + int ret; + u8 num = epnum >> 1; - if (num == 0) { - dep->endpoint.caps.type_control = true; - } else { - dep->endpoint.caps.type_iso = true; - dep->endpoint.caps.type_bulk = true; - dep->endpoint.caps.type_int = true; - } + dep = kzalloc(sizeof(*dep), GFP_KERNEL); + if (!dep) + return -ENOMEM; + + dep->dwc = dwc; + dep->number = epnum; + dep->direction = direction; + dep->regs = dwc->regs + DWC3_DEP_BASE(epnum); + dwc->eps[epnum] = dep; + + snprintf(dep->name, sizeof(dep->name), "ep%u%s", num, + direction ? "in" : "out"); + + dep->endpoint.name = dep->name; + + if (!(dep->number > 1)) { + dep->endpoint.desc = &dwc3_gadget_ep0_desc; + dep->endpoint.comp_desc = NULL; + } + + spin_lock_init(&dep->lock); + + if (num == 0) + ret = dwc3_gadget_init_control_endpoint(dep); + else if (direction) + ret = dwc3_gadget_init_in_endpoint(dep); + else + ret = dwc3_gadget_init_out_endpoint(dep); + + if (ret) + return ret; - dep->endpoint.caps.dir_in = direction; - dep->endpoint.caps.dir_out = !direction; + dep->endpoint.caps.dir_in = direction; + dep->endpoint.caps.dir_out = !direction; - INIT_LIST_HEAD(&dep->pending_list); - INIT_LIST_HEAD(&dep->started_list); + INIT_LIST_HEAD(&dep->pending_list); + INIT_LIST_HEAD(&dep->started_list); + + return 0; +} + +static int dwc3_gadget_init_endpoints(struct dwc3 *dwc, u8 total) +{ + u8 epnum; + + INIT_LIST_HEAD(&dwc->gadget.ep_list); + + for (epnum = 0; epnum < total; epnum++) { + int ret; + + ret = dwc3_gadget_init_endpoint(dwc, epnum); + if (ret) + return ret; } return 0; -- cgit v1.1 From a2d23f08038eceae265f8c609d5ee970c41c4431 Mon Sep 17 00:00:00 2001 From: Felipe Balbi Date: Mon, 9 Apr 2018 12:40:48 +0300 Subject: usb: dwc3: gadget: combine modify & restore into single argument Those two arguments refer to a single bitfield in the register. In order to simplify the code, we can combine them into a single argument and expect caller to pass the correct action argument at all times. Signed-off-by: Felipe Balbi --- drivers/usb/dwc3/gadget.c | 33 +++++++++++---------------------- 1 file changed, 11 insertions(+), 22 deletions(-) (limited to 'drivers/usb') diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c index 4518e85..6e746d4 100644 --- a/drivers/usb/dwc3/gadget.c +++ b/drivers/usb/dwc3/gadget.c @@ -523,16 +523,12 @@ static int dwc3_gadget_start_config(struct dwc3 *dwc, struct dwc3_ep *dep) } static int dwc3_gadget_set_ep_config(struct dwc3 *dwc, struct dwc3_ep *dep, - bool modify, bool restore) + unsigned int action) { const struct usb_ss_ep_comp_descriptor *comp_desc; const struct usb_endpoint_descriptor *desc; struct dwc3_gadget_ep_cmd_params params; - if (dev_WARN_ONCE(dwc->dev, modify && restore, - "Can't modify and restore\n")) - return -EINVAL; - comp_desc = dep->endpoint.comp_desc; desc = dep->endpoint.desc; @@ -547,14 +543,9 @@ static int dwc3_gadget_set_ep_config(struct dwc3 *dwc, struct dwc3_ep *dep, params.param0 |= DWC3_DEPCFG_BURST_SIZE(burst - 1); } - if (modify) { - params.param0 |= DWC3_DEPCFG_ACTION_MODIFY; - } else if (restore) { - params.param0 |= DWC3_DEPCFG_ACTION_RESTORE; + params.param0 |= action; + if (action == DWC3_DEPCFG_ACTION_RESTORE) params.param2 |= dep->saved_state; - } else { - params.param0 |= DWC3_DEPCFG_ACTION_INIT; - } if (usb_endpoint_xfer_control(desc)) params.param1 = DWC3_DEPCFG_XFER_COMPLETE_EN; @@ -609,14 +600,12 @@ static int dwc3_gadget_set_xfer_resource(struct dwc3 *dwc, struct dwc3_ep *dep) /** * __dwc3_gadget_ep_enable - initializes a hw endpoint * @dep: endpoint to be initialized - * @modify: if true, modify existing endpoint configuration - * @restore: if true, restore endpoint configuration from scratch buffer + * @action: one of INIT, MODIFY or RESTORE * * Caller should take care of locking. Execute all necessary commands to * initialize a HW endpoint so it can be used by a gadget driver. */ -static int __dwc3_gadget_ep_enable(struct dwc3_ep *dep, - bool modify, bool restore) +static int __dwc3_gadget_ep_enable(struct dwc3_ep *dep, unsigned int action) { const struct usb_endpoint_descriptor *desc = dep->endpoint.desc; struct dwc3 *dwc = dep->dwc; @@ -630,7 +619,7 @@ static int __dwc3_gadget_ep_enable(struct dwc3_ep *dep, return ret; } - ret = dwc3_gadget_set_ep_config(dwc, dep, modify, restore); + ret = dwc3_gadget_set_ep_config(dwc, dep, action); if (ret) return ret; @@ -804,7 +793,7 @@ static int dwc3_gadget_ep_enable(struct usb_ep *ep, return 0; spin_lock_irqsave(&dwc->lock, flags); - ret = __dwc3_gadget_ep_enable(dep, false, false); + ret = __dwc3_gadget_ep_enable(dep, DWC3_DEPCFG_ACTION_INIT); spin_unlock_irqrestore(&dwc->lock, flags); return ret; @@ -1871,14 +1860,14 @@ static int __dwc3_gadget_start(struct dwc3 *dwc) dwc3_gadget_ep0_desc.wMaxPacketSize = cpu_to_le16(512); dep = dwc->eps[0]; - ret = __dwc3_gadget_ep_enable(dep, false, false); + ret = __dwc3_gadget_ep_enable(dep, DWC3_DEPCFG_ACTION_INIT); if (ret) { dev_err(dwc->dev, "failed to enable %s\n", dep->name); goto err0; } dep = dwc->eps[1]; - ret = __dwc3_gadget_ep_enable(dep, false, false); + ret = __dwc3_gadget_ep_enable(dep, DWC3_DEPCFG_ACTION_INIT); if (ret) { dev_err(dwc->dev, "failed to enable %s\n", dep->name); goto err1; @@ -2789,14 +2778,14 @@ static void dwc3_gadget_conndone_interrupt(struct dwc3 *dwc) } dep = dwc->eps[0]; - ret = __dwc3_gadget_ep_enable(dep, true, false); + ret = __dwc3_gadget_ep_enable(dep, DWC3_DEPCFG_ACTION_MODIFY); if (ret) { dev_err(dwc->dev, "failed to enable %s\n", dep->name); return; } dep = dwc->eps[1]; - ret = __dwc3_gadget_ep_enable(dep, true, false); + ret = __dwc3_gadget_ep_enable(dep, DWC3_DEPCFG_ACTION_MODIFY); if (ret) { dev_err(dwc->dev, "failed to enable %s\n", dep->name); return; -- cgit v1.1 From b07c2db83f921edf492c7608c4d2c3d321e5e30f Mon Sep 17 00:00:00 2001 From: Felipe Balbi Date: Mon, 9 Apr 2018 12:46:47 +0300 Subject: usb: dwc3: gadget: remove a few more dwc arguments In a few places, the argument is completely unnecessary. On places where it's needed, we can get it from dep->dwc. Signed-off-by: Felipe Balbi --- drivers/usb/dwc3/gadget.c | 18 ++++++++++-------- 1 file changed, 10 insertions(+), 8 deletions(-) (limited to 'drivers/usb') diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c index 6e746d4..20c6d3e 100644 --- a/drivers/usb/dwc3/gadget.c +++ b/drivers/usb/dwc3/gadget.c @@ -455,7 +455,7 @@ static void dwc3_free_trb_pool(struct dwc3_ep *dep) dep->trb_pool_dma = 0; } -static int dwc3_gadget_set_xfer_resource(struct dwc3 *dwc, struct dwc3_ep *dep); +static int dwc3_gadget_set_xfer_resource(struct dwc3_ep *dep); /** * dwc3_gadget_start_config - configure ep resources @@ -491,9 +491,10 @@ static int dwc3_gadget_set_xfer_resource(struct dwc3 *dwc, struct dwc3_ep *dep); * triggered only when called for EP0-out, which always happens first, and which * should only happen in one of the above conditions. */ -static int dwc3_gadget_start_config(struct dwc3 *dwc, struct dwc3_ep *dep) +static int dwc3_gadget_start_config(struct dwc3_ep *dep) { struct dwc3_gadget_ep_cmd_params params; + struct dwc3 *dwc; u32 cmd; int i; int ret; @@ -503,6 +504,7 @@ static int dwc3_gadget_start_config(struct dwc3 *dwc, struct dwc3_ep *dep) memset(¶ms, 0x00, sizeof(params)); cmd = DWC3_DEPCMD_DEPSTARTCFG; + dwc = dep->dwc; ret = dwc3_send_gadget_ep_cmd(dep, cmd, ¶ms); if (ret) @@ -514,7 +516,7 @@ static int dwc3_gadget_start_config(struct dwc3 *dwc, struct dwc3_ep *dep) if (!dep) continue; - ret = dwc3_gadget_set_xfer_resource(dwc, dep); + ret = dwc3_gadget_set_xfer_resource(dep); if (ret) return ret; } @@ -522,12 +524,12 @@ static int dwc3_gadget_start_config(struct dwc3 *dwc, struct dwc3_ep *dep) return 0; } -static int dwc3_gadget_set_ep_config(struct dwc3 *dwc, struct dwc3_ep *dep, - unsigned int action) +static int dwc3_gadget_set_ep_config(struct dwc3_ep *dep, unsigned int action) { const struct usb_ss_ep_comp_descriptor *comp_desc; const struct usb_endpoint_descriptor *desc; struct dwc3_gadget_ep_cmd_params params; + struct dwc3 *dwc = dep->dwc; comp_desc = dep->endpoint.comp_desc; desc = dep->endpoint.desc; @@ -585,7 +587,7 @@ static int dwc3_gadget_set_ep_config(struct dwc3 *dwc, struct dwc3_ep *dep, return dwc3_send_gadget_ep_cmd(dep, DWC3_DEPCMD_SETEPCONFIG, ¶ms); } -static int dwc3_gadget_set_xfer_resource(struct dwc3 *dwc, struct dwc3_ep *dep) +static int dwc3_gadget_set_xfer_resource(struct dwc3_ep *dep) { struct dwc3_gadget_ep_cmd_params params; @@ -614,12 +616,12 @@ static int __dwc3_gadget_ep_enable(struct dwc3_ep *dep, unsigned int action) int ret; if (!(dep->flags & DWC3_EP_ENABLED)) { - ret = dwc3_gadget_start_config(dwc, dep); + ret = dwc3_gadget_start_config(dep); if (ret) return ret; } - ret = dwc3_gadget_set_ep_config(dwc, dep, action); + ret = dwc3_gadget_set_ep_config(dep, action); if (ret) return ret; -- cgit v1.1 From 20d1d43fa09a6077cb25de464918fd67a83d61c3 Mon Sep 17 00:00:00 2001 From: Felipe Balbi Date: Mon, 9 Apr 2018 12:49:02 +0300 Subject: usb: dwc3: gadget: move set_xfer_resource() in place of prototype Instead of having a prototype for a function that's defined a few lines down, let's just move definition to the place where prototype was. No functional changes, cleanup only. Signed-off-by: Felipe Balbi --- drivers/usb/dwc3/gadget.c | 24 +++++++++++------------- 1 file changed, 11 insertions(+), 13 deletions(-) (limited to 'drivers/usb') diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c index 20c6d3e..a170c07 100644 --- a/drivers/usb/dwc3/gadget.c +++ b/drivers/usb/dwc3/gadget.c @@ -455,7 +455,17 @@ static void dwc3_free_trb_pool(struct dwc3_ep *dep) dep->trb_pool_dma = 0; } -static int dwc3_gadget_set_xfer_resource(struct dwc3_ep *dep); +static int dwc3_gadget_set_xfer_resource(struct dwc3_ep *dep) +{ + struct dwc3_gadget_ep_cmd_params params; + + memset(¶ms, 0x00, sizeof(params)); + + params.param0 = DWC3_DEPXFERCFG_NUM_XFER_RES(1); + + return dwc3_send_gadget_ep_cmd(dep, DWC3_DEPCMD_SETTRANSFRESOURCE, + ¶ms); +} /** * dwc3_gadget_start_config - configure ep resources @@ -587,18 +597,6 @@ static int dwc3_gadget_set_ep_config(struct dwc3_ep *dep, unsigned int action) return dwc3_send_gadget_ep_cmd(dep, DWC3_DEPCMD_SETEPCONFIG, ¶ms); } -static int dwc3_gadget_set_xfer_resource(struct dwc3_ep *dep) -{ - struct dwc3_gadget_ep_cmd_params params; - - memset(¶ms, 0x00, sizeof(params)); - - params.param0 = DWC3_DEPXFERCFG_NUM_XFER_RES(1); - - return dwc3_send_gadget_ep_cmd(dep, DWC3_DEPCMD_SETTRANSFRESOURCE, - ¶ms); -} - /** * __dwc3_gadget_ep_enable - initializes a hw endpoint * @dep: endpoint to be initialized -- cgit v1.1 From 42626919efabdcae3dbb1d224c69eea1b3007553 Mon Sep 17 00:00:00 2001 From: Felipe Balbi Date: Mon, 9 Apr 2018 13:01:43 +0300 Subject: usb: dwc3: gadget: move dwc3_calc_trbs_left() in place of prototype Avoid a prototype when the function can be defined earlier. No functional changes, cleanup only. Signed-off-by: Felipe Balbi --- drivers/usb/dwc3/gadget.c | 96 +++++++++++++++++++++++------------------------ 1 file changed, 47 insertions(+), 49 deletions(-) (limited to 'drivers/usb') diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c index a170c07..694e55c 100644 --- a/drivers/usb/dwc3/gadget.c +++ b/drivers/usb/dwc3/gadget.c @@ -853,7 +853,53 @@ static void dwc3_gadget_ep_free_request(struct usb_ep *ep, kfree(req); } -static u32 dwc3_calc_trbs_left(struct dwc3_ep *dep); +/** + * dwc3_ep_prev_trb - returns the previous TRB in the ring + * @dep: The endpoint with the TRB ring + * @index: The index of the current TRB in the ring + * + * Returns the TRB prior to the one pointed to by the index. If the + * index is 0, we will wrap backwards, skip the link TRB, and return + * the one just before that. + */ +static struct dwc3_trb *dwc3_ep_prev_trb(struct dwc3_ep *dep, u8 index) +{ + u8 tmp = index; + + if (!tmp) + tmp = DWC3_TRB_NUM - 1; + + return &dep->trb_pool[tmp - 1]; +} + +static u32 dwc3_calc_trbs_left(struct dwc3_ep *dep) +{ + struct dwc3_trb *tmp; + u8 trbs_left; + + /* + * If enqueue & dequeue are equal than it is either full or empty. + * + * One way to know for sure is if the TRB right before us has HWO bit + * set or not. If it has, then we're definitely full and can't fit any + * more transfers in our ring. + */ + if (dep->trb_enqueue == dep->trb_dequeue) { + tmp = dwc3_ep_prev_trb(dep, dep->trb_enqueue); + if (tmp->ctrl & DWC3_TRB_CTRL_HWO) + return 0; + + return DWC3_TRB_NUM - 1; + } + + trbs_left = dep->trb_dequeue - dep->trb_enqueue; + trbs_left &= (DWC3_TRB_NUM - 1); + + if (dep->trb_dequeue < dep->trb_enqueue) + trbs_left--; + + return trbs_left; +} static void __dwc3_prepare_one_trb(struct dwc3_ep *dep, struct dwc3_trb *trb, dma_addr_t dma, unsigned length, unsigned chain, unsigned node, @@ -994,54 +1040,6 @@ static void dwc3_prepare_one_trb(struct dwc3_ep *dep, stream_id, short_not_ok, no_interrupt); } -/** - * dwc3_ep_prev_trb - returns the previous TRB in the ring - * @dep: The endpoint with the TRB ring - * @index: The index of the current TRB in the ring - * - * Returns the TRB prior to the one pointed to by the index. If the - * index is 0, we will wrap backwards, skip the link TRB, and return - * the one just before that. - */ -static struct dwc3_trb *dwc3_ep_prev_trb(struct dwc3_ep *dep, u8 index) -{ - u8 tmp = index; - - if (!tmp) - tmp = DWC3_TRB_NUM - 1; - - return &dep->trb_pool[tmp - 1]; -} - -static u32 dwc3_calc_trbs_left(struct dwc3_ep *dep) -{ - struct dwc3_trb *tmp; - u8 trbs_left; - - /* - * If enqueue & dequeue are equal than it is either full or empty. - * - * One way to know for sure is if the TRB right before us has HWO bit - * set or not. If it has, then we're definitely full and can't fit any - * more transfers in our ring. - */ - if (dep->trb_enqueue == dep->trb_dequeue) { - tmp = dwc3_ep_prev_trb(dep, dep->trb_enqueue); - if (tmp->ctrl & DWC3_TRB_CTRL_HWO) - return 0; - - return DWC3_TRB_NUM - 1; - } - - trbs_left = dep->trb_dequeue - dep->trb_enqueue; - trbs_left &= (DWC3_TRB_NUM - 1); - - if (dep->trb_dequeue < dep->trb_enqueue) - trbs_left--; - - return trbs_left; -} - static void dwc3_prepare_one_trb_sg(struct dwc3_ep *dep, struct dwc3_request *req) { -- cgit v1.1 From e1d542f712e104614cfe906ff6e316dd1828bbf5 Mon Sep 17 00:00:00 2001 From: Felipe Balbi Date: Wed, 11 Apr 2018 10:31:53 +0300 Subject: usb: dwc3: debug: decode uFrame from event too XferNotReady and XferInProgress give us the uFrame number we're currently in. Printing that out on tracepoints may help us find bugs in transfer scheduling. Signed-off-by: Felipe Balbi --- drivers/usb/dwc3/debug.h | 10 +++++++--- 1 file changed, 7 insertions(+), 3 deletions(-) (limited to 'drivers/usb') diff --git a/drivers/usb/dwc3/debug.h b/drivers/usb/dwc3/debug.h index 0be6a55..c66d216 100644 --- a/drivers/usb/dwc3/debug.h +++ b/drivers/usb/dwc3/debug.h @@ -493,14 +493,18 @@ dwc3_ep_event_string(char *str, const struct dwc3_event_depevt *event, case DWC3_DEPEVT_XFERINPROGRESS: len = strlen(str); - sprintf(str + len, "Transfer In Progress (%c%c%c)", + sprintf(str + len, "Transfer In Progress [%d] (%c%c%c)", + event->parameters, status & DEPEVT_STATUS_SHORT ? 'S' : 's', status & DEPEVT_STATUS_IOC ? 'I' : 'i', status & DEPEVT_STATUS_LST ? 'M' : 'm'); break; case DWC3_DEPEVT_XFERNOTREADY: - strcat(str, "Transfer Not Ready"); - strcat(str, status & DEPEVT_STATUS_TRANSFER_ACTIVE ? + len = strlen(str); + + sprintf(str + len, "Transfer Not Ready [%d]%s", + event->parameters, + status & DEPEVT_STATUS_TRANSFER_ACTIVE ? " (Active)" : " (Not Active)"); /* Control Endpoints */ -- cgit v1.1 From d513320f1fd013d789516a51823a11dc23a3fd55 Mon Sep 17 00:00:00 2001 From: Felipe Balbi Date: Wed, 11 Apr 2018 10:32:52 +0300 Subject: usb: dwc3: gadget: don't issue End Transfer if we have started reqs In case we have many started requests and one of them in the middle is completed with Missed Isoc, let's not End Transfer as that would result in us loosing (possibly) many more intervals. Instead, let's allow the controller to go through its list of started requests. Signed-off-by: Felipe Balbi --- drivers/usb/dwc3/gadget.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) (limited to 'drivers/usb') diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c index 694e55c..e9e0e28 100644 --- a/drivers/usb/dwc3/gadget.c +++ b/drivers/usb/dwc3/gadget.c @@ -2398,7 +2398,9 @@ static void dwc3_gadget_endpoint_transfer_in_progress(struct dwc3_ep *dep, if (event->status & DEPEVT_STATUS_MISSED_ISOC) { status = -EXDEV; - stop = true; + + if (list_empty(&dep->started_list)) + stop = true; } dwc3_gadget_ep_cleanup_completed_requests(dep, event, status); -- cgit v1.1 From f62afb4929a83cb7e81bd2ac411f2d4977716cf6 Mon Sep 17 00:00:00 2001 From: Felipe Balbi Date: Wed, 11 Apr 2018 10:34:34 +0300 Subject: usb: dwc3: gadget: always start isochronous aligned to dep->interval We will *always* start transfer to the next uFrame number aligned to dep->interval. Signed-off-by: Felipe Balbi --- drivers/usb/dwc3/gadget.c | 15 +++++---------- 1 file changed, 5 insertions(+), 10 deletions(-) (limited to 'drivers/usb') diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c index e9e0e28..abdc3ac 100644 --- a/drivers/usb/dwc3/gadget.c +++ b/drivers/usb/dwc3/gadget.c @@ -27,6 +27,9 @@ #include "gadget.h" #include "io.h" +#define DWC3_ALIGN_FRAME(d) (((d)->frame_number + (d)->interval) \ + & ~((d)->interval - 1)) + /** * dwc3_gadget_set_test_mode - enables usb2 test modes * @dwc: pointer to our context structure @@ -1267,11 +1270,7 @@ static void __dwc3_gadget_start_isoc(struct dwc3_ep *dep) return; } - /* - * Schedule the first trb for one interval in the future or at - * least 4 microframes. - */ - dep->frame_number += max_t(u32, 4, dep->interval); + dep->frame_number = DWC3_ALIGN_FRAME(dep); __dwc3_gadget_kick_transfer(dep); } @@ -2377,11 +2376,7 @@ static void dwc3_gadget_ep_cleanup_completed_requests(struct dwc3_ep *dep, static void dwc3_gadget_endpoint_frame_from_event(struct dwc3_ep *dep, const struct dwc3_event_depevt *event) { - u32 cur_uf, mask; - - mask = ~(dep->interval - 1); - cur_uf = event->parameters & mask; - dep->frame_number = cur_uf; + dep->frame_number = event->parameters; } static void dwc3_gadget_endpoint_transfer_in_progress(struct dwc3_ep *dep, -- cgit v1.1 From 4439661d64f5afa77f2df1e3450da5e22ab6532e Mon Sep 17 00:00:00 2001 From: Felipe Balbi Date: Wed, 11 Apr 2018 12:56:24 +0300 Subject: usb: dwc3: gadget: assign resource_index inside get_transfer_index() Instead of returning resource index number just to assign it to a field inside 'dep' which was passed as argument, we can assing dep->resource_index from inside dwc3_gadget_ep_get_transfer_index() itself. Signed-off-by: Felipe Balbi --- drivers/usb/dwc3/ep0.c | 2 +- drivers/usb/dwc3/gadget.c | 9 +++------ drivers/usb/dwc3/gadget.h | 5 ++--- 3 files changed, 6 insertions(+), 10 deletions(-) (limited to 'drivers/usb') diff --git a/drivers/usb/dwc3/ep0.c b/drivers/usb/dwc3/ep0.c index 826fee2..b587ae1 100644 --- a/drivers/usb/dwc3/ep0.c +++ b/drivers/usb/dwc3/ep0.c @@ -79,7 +79,7 @@ static int dwc3_ep0_start_trans(struct dwc3_ep *dep) if (ret < 0) return ret; - dep->resource_index = dwc3_gadget_ep_get_transfer_index(dep); + dwc3_gadget_ep_get_transfer_index(dep); dwc->ep0_next_event = DWC3_EP0_COMPLETE; return 0; diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c index abdc3ac..9e4db9c 100644 --- a/drivers/usb/dwc3/gadget.c +++ b/drivers/usb/dwc3/gadget.c @@ -683,8 +683,7 @@ static int __dwc3_gadget_ep_enable(struct dwc3_ep *dep, unsigned int action) if (ret < 0) return ret; - dep->resource_index = dwc3_gadget_ep_get_transfer_index(dep); - WARN_ON_ONCE(!dep->resource_index); + dwc3_gadget_ep_get_transfer_index(dep); } out: @@ -1245,10 +1244,8 @@ static int __dwc3_gadget_kick_transfer(struct dwc3_ep *dep) return ret; } - if (starting) { - dep->resource_index = dwc3_gadget_ep_get_transfer_index(dep); - WARN_ON_ONCE(!dep->resource_index); - } + if (starting) + dwc3_gadget_ep_get_transfer_index(dep); return 0; } diff --git a/drivers/usb/dwc3/gadget.h b/drivers/usb/dwc3/gadget.h index 578aa85..db610c5 100644 --- a/drivers/usb/dwc3/gadget.h +++ b/drivers/usb/dwc3/gadget.h @@ -98,13 +98,12 @@ int __dwc3_gadget_ep_set_halt(struct dwc3_ep *dep, int value, int protocol); * Caller should take care of locking. Returns the transfer resource * index for a given endpoint. */ -static inline u32 dwc3_gadget_ep_get_transfer_index(struct dwc3_ep *dep) +static inline void dwc3_gadget_ep_get_transfer_index(struct dwc3_ep *dep) { u32 res_id; res_id = dwc3_readl(dep->regs, DWC3_DEPCMD); - - return DWC3_DEPCMD_GET_RSC_IDX(res_id); + dep->resource_index = DWC3_DEPCMD_GET_RSC_IDX(res_id); } #endif /* __DRIVERS_USB_DWC3_GADGET_H */ -- cgit v1.1 From d7ca7e1896b27eaca936ff8ff3abdd2492b55a34 Mon Sep 17 00:00:00 2001 From: Felipe Balbi Date: Wed, 11 Apr 2018 12:58:46 +0300 Subject: usb: dwc3: gadget: initialize transfer index from send_gadget_ep_cmd() Instead of *always* calling dwc3_gadget_ep_get_transfer_index() after sending a Start Transfer command, we can call it once from dwc3_send_gadget_ep_cmd() itself. Signed-off-by: Felipe Balbi --- drivers/usb/dwc3/ep0.c | 1 - drivers/usb/dwc3/gadget.c | 6 +----- 2 files changed, 1 insertion(+), 6 deletions(-) (limited to 'drivers/usb') diff --git a/drivers/usb/dwc3/ep0.c b/drivers/usb/dwc3/ep0.c index b587ae1..c77ff50 100644 --- a/drivers/usb/dwc3/ep0.c +++ b/drivers/usb/dwc3/ep0.c @@ -79,7 +79,6 @@ static int dwc3_ep0_start_trans(struct dwc3_ep *dep) if (ret < 0) return ret; - dwc3_gadget_ep_get_transfer_index(dep); dwc->ep0_next_event = DWC3_EP0_COMPLETE; return 0; diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c index 9e4db9c..cca692e 100644 --- a/drivers/usb/dwc3/gadget.c +++ b/drivers/usb/dwc3/gadget.c @@ -378,6 +378,7 @@ int dwc3_send_gadget_ep_cmd(struct dwc3_ep *dep, unsigned cmd, switch (DWC3_DEPCMD_CMD(cmd)) { case DWC3_DEPCMD_STARTTRANSFER: dep->flags |= DWC3_EP_TRANSFER_STARTED; + dwc3_gadget_ep_get_transfer_index(dep); break; case DWC3_DEPCMD_ENDTRANSFER: dep->flags &= ~DWC3_EP_TRANSFER_STARTED; @@ -682,8 +683,6 @@ static int __dwc3_gadget_ep_enable(struct dwc3_ep *dep, unsigned int action) ret = dwc3_send_gadget_ep_cmd(dep, cmd, ¶ms); if (ret < 0) return ret; - - dwc3_gadget_ep_get_transfer_index(dep); } out: @@ -1244,9 +1243,6 @@ static int __dwc3_gadget_kick_transfer(struct dwc3_ep *dep) return ret; } - if (starting) - dwc3_gadget_ep_get_transfer_index(dep); - return 0; } -- cgit v1.1 From 31a2f5a7e13633712a97721458f6c5980c2d386e Mon Sep 17 00:00:00 2001 From: Felipe Balbi Date: Mon, 7 May 2018 15:19:31 +0300 Subject: usb: dwc3: gadget: init req->{direction,epnum} from alloc_request() We dont' need to touch req->direction or req->epnum from ep_queue(). It's enough that we initialize both fields from alloc_request() and just keep them for the entire lifetime of the request. No functional changes. Signed-off-by: Felipe Balbi --- drivers/usb/dwc3/gadget.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) (limited to 'drivers/usb') diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c index cca692e..4ca593c 100644 --- a/drivers/usb/dwc3/gadget.c +++ b/drivers/usb/dwc3/gadget.c @@ -837,6 +837,7 @@ static struct usb_request *dwc3_gadget_ep_alloc_request(struct usb_ep *ep, if (!req) return NULL; + req->direction = dep->direction; req->epnum = dep->number; req->dep = dep; @@ -1285,8 +1286,6 @@ static int __dwc3_gadget_ep_queue(struct dwc3_ep *dep, struct dwc3_request *req) req->request.actual = 0; req->request.status = -EINPROGRESS; - req->direction = dep->direction; - req->epnum = dep->number; trace_dwc3_ep_queue(req); -- cgit v1.1 From edbbfe19444e01bbd6d441b28709ff794455d46f Mon Sep 17 00:00:00 2001 From: kbuild test robot Date: Fri, 18 May 2018 00:06:41 +0800 Subject: usb: dwc3: dwc3_get_extcon() can be static Fix sparse warning Fixes: 5f0b74e54890 ("USB: dwc3: get extcon device by OF graph bindings") Reviewed-by: Andrzej Hajda Signed-off-by: kbuild test robot Signed-off-by: Felipe Balbi --- drivers/usb/dwc3/drd.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers/usb') diff --git a/drivers/usb/dwc3/drd.c b/drivers/usb/dwc3/drd.c index 2706824..218371f 100644 --- a/drivers/usb/dwc3/drd.c +++ b/drivers/usb/dwc3/drd.c @@ -440,7 +440,7 @@ static int dwc3_drd_notifier(struct notifier_block *nb, return NOTIFY_DONE; } -struct extcon_dev *dwc3_get_extcon(struct dwc3 *dwc) +static struct extcon_dev *dwc3_get_extcon(struct dwc3 *dwc) { struct device *dev = dwc->dev; struct device_node *np_phy, *np_conn; -- cgit v1.1 From 431d93c20558abe255c6a1a5db150a2f2bc3dadd Mon Sep 17 00:00:00 2001 From: Nikhil Badola Date: Thu, 17 May 2018 18:28:37 -0300 Subject: usb: gadget: fsl: Introduce FSL_USB2_PHY_UTMI_DUAL for usb gadget Introduce FSL_USB2_PHY_UTMI_DUAL in gadget driver for setting phy in SOCs with utmi dual phy Acked-by: Li Yang Signed-off-by: Nikhil Badola Tested-by: Tiago Brusamarello Signed-off-by: Felipe Balbi --- drivers/usb/gadget/udc/fsl_udc_core.c | 1 + 1 file changed, 1 insertion(+) (limited to 'drivers/usb') diff --git a/drivers/usb/gadget/udc/fsl_udc_core.c b/drivers/usb/gadget/udc/fsl_udc_core.c index 56b517a..a3c092b 100644 --- a/drivers/usb/gadget/udc/fsl_udc_core.c +++ b/drivers/usb/gadget/udc/fsl_udc_core.c @@ -253,6 +253,7 @@ static int dr_controller_setup(struct fsl_udc *udc) portctrl |= PORTSCX_PTW_16BIT; /* fall through */ case FSL_USB2_PHY_UTMI: + case FSL_USB2_PHY_UTMI_DUAL: if (udc->pdata->have_sysif_regs) { if (udc->pdata->controller_ver) { /* controller version 1.6 or above */ -- cgit v1.1 From 6fb914d788133fd2298af87c50aefe1863cf1445 Mon Sep 17 00:00:00 2001 From: Grigor Tovmasyan Date: Wed, 16 May 2018 12:04:24 +0400 Subject: usb: dwc2: Fix kernel doc's warnings. Added descriptions for all not described parameters. Fix all kernel doc's warnings. Acked-by: Minas Harutyunyan Signed-off-by: Grigor Tovmasyan Signed-off-by: Felipe Balbi --- drivers/usb/dwc2/core.c | 7 ++ drivers/usb/dwc2/core.h | 170 ++++++++++++++++++++++++++++++++++--------- drivers/usb/dwc2/debug.h | 2 +- drivers/usb/dwc2/debugfs.c | 19 ++--- drivers/usb/dwc2/gadget.c | 29 +++++--- drivers/usb/dwc2/hcd.c | 3 +- drivers/usb/dwc2/hcd.h | 14 ++-- drivers/usb/dwc2/hcd_ddma.c | 1 + drivers/usb/dwc2/hcd_intr.c | 12 +++ drivers/usb/dwc2/hcd_queue.c | 5 +- drivers/usb/dwc2/params.c | 8 ++ drivers/usb/dwc2/pci.c | 6 ++ 12 files changed, 215 insertions(+), 61 deletions(-) (limited to 'drivers/usb') diff --git a/drivers/usb/dwc2/core.c b/drivers/usb/dwc2/core.c index 18a0a17..1c36a6a 100644 --- a/drivers/usb/dwc2/core.c +++ b/drivers/usb/dwc2/core.c @@ -419,6 +419,8 @@ static void dwc2_wait_for_mode(struct dwc2_hsotg *hsotg, /** * dwc2_iddig_filter_enabled() - Returns true if the IDDIG debounce * filter is enabled. + * + * @hsotg: Programming view of DWC_otg controller */ static bool dwc2_iddig_filter_enabled(struct dwc2_hsotg *hsotg) { @@ -564,6 +566,9 @@ int dwc2_core_reset(struct dwc2_hsotg *hsotg, bool skip_wait) * If a force is done, it requires a IDDIG debounce filter delay if * the filter is configured and enabled. We poll the current mode of * the controller to account for this delay. + * + * @hsotg: Programming view of DWC_otg controller + * @host: Host mode flag */ void dwc2_force_mode(struct dwc2_hsotg *hsotg, bool host) { @@ -610,6 +615,8 @@ void dwc2_force_mode(struct dwc2_hsotg *hsotg, bool host) * or not because the value of the connector ID status is affected by * the force mode. We only need to call this once during probe if * dr_mode == OTG. + * + * @hsotg: Programming view of DWC_otg controller */ static void dwc2_clear_force_mode(struct dwc2_hsotg *hsotg) { diff --git a/drivers/usb/dwc2/core.h b/drivers/usb/dwc2/core.h index 2438480..6d304e9 100644 --- a/drivers/usb/dwc2/core.h +++ b/drivers/usb/dwc2/core.h @@ -164,12 +164,11 @@ struct dwc2_hsotg_req; * and has yet to be completed (maybe due to data move, or simply * awaiting an ack from the core all the data has been completed). * @debugfs: File entry for debugfs file for this endpoint. - * @lock: State lock to protect contents of endpoint. * @dir_in: Set to true if this endpoint is of the IN direction, which * means that it is sending data to the Host. * @index: The index for the endpoint registers. * @mc: Multi Count - number of transactions per microframe - * @interval - Interval for periodic endpoints, in frames or microframes. + * @interval: Interval for periodic endpoints, in frames or microframes. * @name: The name array passed to the USB core. * @halted: Set if the endpoint has been halted. * @periodic: Set if this is a periodic ep, such as Interrupt @@ -182,6 +181,7 @@ struct dwc2_hsotg_req; * @compl_desc: index of next descriptor to be completed by xFerComplete * @total_data: The total number of data bytes done. * @fifo_size: The size of the FIFO (for periodic IN endpoints) + * @fifo_index: For Dedicated FIFO operation, only FIFO0 can be used for EP0. * @fifo_load: The amount of data loaded into the FIFO (periodic IN) * @last_load: The offset of data for the last start of request. * @size_loaded: The last loaded size for DxEPTSIZE for periodic IN @@ -380,9 +380,12 @@ enum dwc2_ep0_state { * is FS. * 0 - No (default) * 1 - Yes - * @ipg_isoc_en Indicates the IPG supports is enabled or disabled. + * @ipg_isoc_en: Indicates the IPG supports is enabled or disabled. * 0 - Disable (default) * 1 - Enable + * @acg_enable: For enabling Active Clock Gating in the controller + * 0 - No + * 1 - Yes * @ulpi_fs_ls: Make ULPI phy operate in FS/LS mode only * 0 - No (default) * 1 - Yes @@ -552,7 +555,7 @@ struct dwc2_core_params { * * The values that are not in dwc2_core_params are documented below. * - * @op_mode Mode of Operation + * @op_mode: Mode of Operation * 0 - HNP- and SRP-Capable OTG (Host & Device) * 1 - SRP-Capable OTG (Host & Device) * 2 - Non-HNP and Non-SRP Capable OTG (Host & Device) @@ -560,49 +563,102 @@ struct dwc2_core_params { * 4 - Non-OTG Device * 5 - SRP-Capable Host * 6 - Non-OTG Host - * @arch Architecture + * @arch: Architecture * 0 - Slave only * 1 - External DMA * 2 - Internal DMA - * @ipg_isoc_en This feature indicates that the controller supports + * @ipg_isoc_en: This feature indicates that the controller supports * the worst-case scenario of Rx followed by Rx * Interpacket Gap (IPG) (32 bitTimes) as per the utmi * specification for any token following ISOC OUT token. * 0 - Don't support * 1 - Support - * @power_optimized Are power optimizations enabled? - * @num_dev_ep Number of device endpoints available - * @num_dev_in_eps Number of device IN endpoints available - * @num_dev_perio_in_ep Number of device periodic IN endpoints - * available - * @dev_token_q_depth Device Mode IN Token Sequence Learning Queue + * @power_optimized: Are power optimizations enabled? + * @num_dev_ep: Number of device endpoints available + * @num_dev_in_eps: Number of device IN endpoints available + * @num_dev_perio_in_ep: Number of device periodic IN endpoints + * available + * @dev_token_q_depth: Device Mode IN Token Sequence Learning Queue * Depth * 0 to 30 - * @host_perio_tx_q_depth + * @host_perio_tx_q_depth: * Host Mode Periodic Request Queue Depth * 2, 4 or 8 - * @nperio_tx_q_depth + * @nperio_tx_q_depth: * Non-Periodic Request Queue Depth * 2, 4 or 8 - * @hs_phy_type High-speed PHY interface type + * @hs_phy_type: High-speed PHY interface type * 0 - High-speed interface not supported * 1 - UTMI+ * 2 - ULPI * 3 - UTMI+ and ULPI - * @fs_phy_type Full-speed PHY interface type + * @fs_phy_type: Full-speed PHY interface type * 0 - Full speed interface not supported * 1 - Dedicated full speed interface * 2 - FS pins shared with UTMI+ pins * 3 - FS pins shared with ULPI pins * @total_fifo_size: Total internal RAM for FIFOs (bytes) - * @hibernation Is hibernation enabled? - * @utmi_phy_data_width UTMI+ PHY data width + * @hibernation: Is hibernation enabled? + * @utmi_phy_data_width: UTMI+ PHY data width * 0 - 8 bits * 1 - 16 bits * 2 - 8 or 16 bits * @snpsid: Value from SNPSID register * @dev_ep_dirs: Direction of device endpoints (GHWCFG1) - * @g_tx_fifo_size[] Power-on values of TxFIFO sizes + * @g_tx_fifo_size: Power-on values of TxFIFO sizes + * @dma_desc_enable: When DMA mode is enabled, specifies whether to use + * address DMA mode or descriptor DMA mode for accessing + * the data FIFOs. The driver will automatically detect the + * value for this if none is specified. + * 0 - Address DMA + * 1 - Descriptor DMA (default, if available) + * @enable_dynamic_fifo: 0 - Use coreConsultant-specified FIFO size parameters + * 1 - Allow dynamic FIFO sizing (default, if available) + * @en_multiple_tx_fifo: Specifies whether dedicated per-endpoint transmit FIFOs + * are enabled for non-periodic IN endpoints in device + * mode. + * @host_nperio_tx_fifo_size: Number of 4-byte words in the non-periodic Tx FIFO + * in host mode when dynamic FIFO sizing is enabled + * 16 to 32768 + * Actual maximum value is autodetected and also + * the default. + * @host_perio_tx_fifo_size: Number of 4-byte words in the periodic Tx FIFO in + * host mode when dynamic FIFO sizing is enabled + * 16 to 32768 + * Actual maximum value is autodetected and also + * the default. + * @max_transfer_size: The maximum transfer size supported, in bytes + * 2047 to 65,535 + * Actual maximum value is autodetected and also + * the default. + * @max_packet_count: The maximum number of packets in a transfer + * 15 to 511 + * Actual maximum value is autodetected and also + * the default. + * @host_channels: The number of host channel registers to use + * 1 to 16 + * Actual maximum value is autodetected and also + * the default. + * @dev_nperio_tx_fifo_size: Number of 4-byte words in the non-periodic Tx FIFO + * in device mode when dynamic FIFO sizing is enabled + * 16 to 32768 + * Actual maximum value is autodetected and also + * the default. + * @i2c_enable: Specifies whether to use the I2Cinterface for a full + * speed PHY. This parameter is only applicable if phy_type + * is FS. + * 0 - No (default) + * 1 - Yes + * @acg_enable: For enabling Active Clock Gating in the controller + * 0 - Disable + * 1 - Enable + * @lpm_mode: For enabling Link Power Management in the controller + * 0 - Disable + * 1 - Enable + * @rx_fifo_size: Number of 4-byte words in the Rx FIFO when dynamic + * FIFO sizing is enabled 16 to 32768 + * Actual maximum value is autodetected and also + * the default. */ struct dwc2_hw_params { unsigned op_mode:3; @@ -653,7 +709,11 @@ struct dwc2_hw_params { * @gi2cctl: Backup of GI2CCTL register * @glpmcfg: Backup of GLPMCFG register * @gdfifocfg: Backup of GDFIFOCFG register + * @pcgcctl: Backup of PCGCCTL register + * @pcgcctl1: Backup of PCGCCTL1 register + * @dtxfsiz: Backup of DTXFSIZ registers for each endpoint * @gpwrdn: Backup of GPWRDN register + * @valid: True if registers values backuped. */ struct dwc2_gregs_backup { u32 gotgctl; @@ -686,6 +746,7 @@ struct dwc2_gregs_backup { * @doeptsiz: Backup of DOEPTSIZ register * @doepdma: Backup of DOEPDMA register * @dtxfsiz: Backup of DTXFSIZ registers for each endpoint + * @valid: True if registers values backuped. */ struct dwc2_dregs_backup { u32 dcfg; @@ -709,9 +770,10 @@ struct dwc2_dregs_backup { * @hcfg: Backup of HCFG register * @haintmsk: Backup of HAINTMSK register * @hcintmsk: Backup of HCINTMSK register - * @hptr0: Backup of HPTR0 register + * @hprt0: Backup of HPTR0 register * @hfir: Backup of HFIR register * @hptxfsiz: Backup of HPTXFSIZ register + * @valid: True if registers values backuped. */ struct dwc2_hregs_backup { u32 hcfg; @@ -811,7 +873,7 @@ struct dwc2_hregs_backup { * @regs: Pointer to controller regs * @hw_params: Parameters that were autodetected from the * hardware registers - * @core_params: Parameters that define how the core should be configured + * @params: Parameters that define how the core should be configured * @op_state: The operational State, during transitions (a_host=> * a_peripheral and b_device=>b_host) this may not match * the core, but allows the software to determine @@ -820,9 +882,9 @@ struct dwc2_hregs_backup { * - USB_DR_MODE_PERIPHERAL * - USB_DR_MODE_HOST * - USB_DR_MODE_OTG - * @hcd_enabled Host mode sub-driver initialization indicator. - * @gadget_enabled Peripheral mode sub-driver initialization indicator. - * @ll_hw_enabled Status of low-level hardware resources. + * @hcd_enabled: Host mode sub-driver initialization indicator. + * @gadget_enabled: Peripheral mode sub-driver initialization indicator. + * @ll_hw_enabled: Status of low-level hardware resources. * @hibernated: True if core is hibernated * @frame_number: Frame number read from the core. For both device * and host modes. The value ranges are from 0 @@ -846,13 +908,25 @@ struct dwc2_hregs_backup { * interrupt * @wkp_timer: Timer object for handling Wakeup Detected interrupt * @lx_state: Lx state of connected device - * @gregs_backup: Backup of global registers during suspend - * @dregs_backup: Backup of device registers during suspend - * @hregs_backup: Backup of host registers during suspend + * @gr_backup: Backup of global registers during suspend + * @dr_backup: Backup of device registers during suspend + * @hr_backup: Backup of host registers during suspend * * These are for host mode: * * @flags: Flags for handling root port state changes + * @flags.d32: Contain all root port flags + * @flags.b: Separate root port flags from each other + * @flags.b.port_connect_status_change: True if root port connect status + * changed + * @flags.b.port_connect_status: True if device connected to root port + * @flags.b.port_reset_change: True if root port reset status changed + * @flags.b.port_enable_change: True if root port enable status changed + * @flags.b.port_suspend_change: True if root port suspend status changed + * @flags.b.port_over_current_change: True if root port over current state + * changed. + * @flags.b.port_l1_change: True if root port l1 status changed + * @flags.b.reserved: Reserved bits of root port register * @non_periodic_sched_inactive: Inactive QHs in the non-periodic schedule. * Transfers associated with these QHs are not currently * assigned to a host channel. @@ -861,6 +935,9 @@ struct dwc2_hregs_backup { * assigned to a host channel. * @non_periodic_qh_ptr: Pointer to next QH to process in the active * non-periodic schedule + * @non_periodic_sched_waiting: Waiting QHs in the non-periodic schedule. + * Transfers associated with these QHs are not currently + * assigned to a host channel. * @periodic_sched_inactive: Inactive QHs in the periodic schedule. This is a * list of QHs for periodic transfers that are _not_ * scheduled for the next frame. Each QH in the list has an @@ -910,8 +987,8 @@ struct dwc2_hregs_backup { * host channel is available for non-periodic transactions. * @non_periodic_channels: Number of host channels assigned to non-periodic * transfers - * @available_host_channels Number of host channels available for the microframe - * scheduler to use + * @available_host_channels: Number of host channels available for the + * microframe scheduler to use * @hc_ptr_array: Array of pointers to the host channel descriptors. * Allows accessing a host channel descriptor given the * host channel number. This is useful in interrupt @@ -934,9 +1011,6 @@ struct dwc2_hregs_backup { * @dedicated_fifos: Set if the hardware has dedicated IN-EP fifos. * @num_of_eps: Number of available EPs (excluding EP0) * @debug_root: Root directrory for debugfs. - * @debug_file: Main status file for debugfs. - * @debug_testmode: Testmode status file for debugfs. - * @debug_fifo: FIFO status file for debugfs. * @ep0_reply: Request used for ep0 reply. * @ep0_buff: Buffer for EP0 reply data, if needed. * @ctrl_buff: Buffer for EP0 control requests. @@ -951,7 +1025,37 @@ struct dwc2_hregs_backup { * @ctrl_in_desc: EP0 IN data phase desc chain pointer * @ctrl_out_desc_dma: EP0 OUT data phase desc chain DMA address * @ctrl_out_desc: EP0 OUT data phase desc chain pointer - * @eps: The endpoints being supplied to the gadget framework + * @irq: Interrupt request line number + * @clk: Pointer to otg clock + * @reset: Pointer to dwc2 reset controller + * @reset_ecc: Pointer to dwc2 optional reset controller in Stratix10. + * @regset: A pointer to a struct debugfs_regset32, which contains + * a pointer to an array of register definitions, the + * array size and the base address where the register bank + * is to be found. + * @bus_suspended: True if bus is suspended + * @last_frame_num: Number of last frame. Range from 0 to 32768 + * @frame_num_array: Used only if CONFIG_USB_DWC2_TRACK_MISSED_SOFS is + * defined, for missed SOFs tracking. Array holds that + * frame numbers, which not equal to last_frame_num +1 + * @last_frame_num_array: Used only if CONFIG_USB_DWC2_TRACK_MISSED_SOFS is + * defined, for missed SOFs tracking. + * If current_frame_number != last_frame_num+1 + * then last_frame_num added to this array + * @frame_num_idx: Actual size of frame_num_array and last_frame_num_array + * @dumped_frame_num_array: 1 - if missed SOFs frame numbers dumbed + * 0 - if missed SOFs frame numbers not dumbed + * @fifo_mem: Total internal RAM for FIFOs (bytes) + * @fifo_map: Each bit intend for concrete fifo. If that bit is set, + * then that fifo is used + * @gadget: Represents a usb slave device + * @connected: Used in slave mode. True if device connected with host + * @eps_in: The IN endpoints being supplied to the gadget framework + * @eps_out: The OUT endpoints being supplied to the gadget framework + * @new_connection: Used in host mode. True if there are new connected + * device + * @enabled: Indicates the enabling state of controller + * */ struct dwc2_hsotg { struct device *dev; diff --git a/drivers/usb/dwc2/debug.h b/drivers/usb/dwc2/debug.h index 6f23219..a8c565b 100644 --- a/drivers/usb/dwc2/debug.h +++ b/drivers/usb/dwc2/debug.h @@ -1,5 +1,5 @@ // SPDX-License-Identifier: GPL-2.0 -/** +/* * debug.h - Designware USB2 DRD controller debug header * * Copyright (C) 2015 Intel Corporation diff --git a/drivers/usb/dwc2/debugfs.c b/drivers/usb/dwc2/debugfs.c index a21f893..7e6618a 100644 --- a/drivers/usb/dwc2/debugfs.c +++ b/drivers/usb/dwc2/debugfs.c @@ -1,5 +1,5 @@ // SPDX-License-Identifier: GPL-2.0 -/** +/* * debugfs.c - Designware USB2 DRD controller debugfs * * Copyright (C) 2015 Intel Corporation @@ -16,12 +16,13 @@ #if IS_ENABLED(CONFIG_USB_DWC2_PERIPHERAL) || \ IS_ENABLED(CONFIG_USB_DWC2_DUAL_ROLE) + /** - * testmode_write - debugfs: change usb test mode - * @seq: The seq file to write to. - * @v: Unused parameter. - * - * This debugfs entry modify the current usb test mode. + * testmode_write() - change usb test mode state. + * @file: The file to write to. + * @ubuf: The buffer where user wrote. + * @count: The ubuf size. + * @ppos: Unused parameter. */ static ssize_t testmode_write(struct file *file, const char __user *ubuf, size_t count, loff_t *ppos) @@ -55,9 +56,9 @@ static ssize_t testmode_write(struct file *file, const char __user *ubuf, size_t } /** - * testmode_show - debugfs: show usb test mode state - * @seq: The seq file to write to. - * @v: Unused parameter. + * testmode_show() - debugfs: show usb test mode state + * @s: The seq file to write to. + * @unused: Unused parameter. * * This debugfs entry shows which usb test mode is currently enabled. */ diff --git a/drivers/usb/dwc2/gadget.c b/drivers/usb/dwc2/gadget.c index e64a6dc..684b4f5 100644 --- a/drivers/usb/dwc2/gadget.c +++ b/drivers/usb/dwc2/gadget.c @@ -1,5 +1,5 @@ // SPDX-License-Identifier: GPL-2.0 -/** +/* * Copyright (c) 2011 Samsung Electronics Co., Ltd. * http://www.samsung.com * @@ -107,7 +107,6 @@ static inline bool using_desc_dma(struct dwc2_hsotg *hsotg) /** * dwc2_gadget_incr_frame_num - Increments the targeted frame number. * @hs_ep: The endpoint - * @increment: The value to increment by * * This function will also check if the frame number overruns DSTS_SOFFN_LIMIT. * If an overrun occurs it will wrap the value and set the frame_overrun flag. @@ -190,6 +189,8 @@ static void dwc2_hsotg_ctrl_epint(struct dwc2_hsotg *hsotg, /** * dwc2_hsotg_tx_fifo_count - return count of TX FIFOs in device mode + * + * @hsotg: Programming view of the DWC_otg controller */ int dwc2_hsotg_tx_fifo_count(struct dwc2_hsotg *hsotg) { @@ -204,6 +205,8 @@ int dwc2_hsotg_tx_fifo_count(struct dwc2_hsotg *hsotg) /** * dwc2_hsotg_tx_fifo_total_depth - return total FIFO depth available for * device mode TX FIFOs + * + * @hsotg: Programming view of the DWC_otg controller */ int dwc2_hsotg_tx_fifo_total_depth(struct dwc2_hsotg *hsotg) { @@ -227,6 +230,8 @@ int dwc2_hsotg_tx_fifo_total_depth(struct dwc2_hsotg *hsotg) /** * dwc2_hsotg_tx_fifo_average_depth - returns average depth of device mode * TX FIFOs + * + * @hsotg: Programming view of the DWC_otg controller */ int dwc2_hsotg_tx_fifo_average_depth(struct dwc2_hsotg *hsotg) { @@ -327,6 +332,7 @@ static void dwc2_hsotg_init_fifo(struct dwc2_hsotg *hsotg) } /** + * dwc2_hsotg_ep_alloc_request - allocate USB rerequest structure * @ep: USB endpoint to allocate request for. * @flags: Allocation flags * @@ -2424,6 +2430,7 @@ static u32 dwc2_hsotg_ep0_mps(unsigned int mps) * @ep: The index number of the endpoint * @mps: The maximum packet size in bytes * @mc: The multicount value + * @dir_in: True if direction is in. * * Configure the maximum packet size for the given endpoint, updating * the hardware control registers to reflect this. @@ -2723,7 +2730,7 @@ static void dwc2_gadget_handle_ep_disabled(struct dwc2_hsotg_ep *hs_ep) /** * dwc2_gadget_handle_out_token_ep_disabled - handle DXEPINT_OUTTKNEPDIS - * @hs_ep: The endpoint on which interrupt is asserted. + * @ep: The endpoint on which interrupt is asserted. * * This is starting point for ISOC-OUT transfer, synchronization done with * first out token received from host while corresponding EP is disabled. @@ -3183,6 +3190,7 @@ static void dwc2_hsotg_irq_fifoempty(struct dwc2_hsotg *hsotg, bool periodic) /** * dwc2_hsotg_core_init - issue softreset to the core * @hsotg: The device state + * @is_usb_reset: Usb resetting flag * * Issue a soft reset to the core, and await the core finishing it. */ @@ -4289,7 +4297,6 @@ err: /** * dwc2_hsotg_udc_stop - stop the udc * @gadget: The usb gadget state - * @driver: The usb gadget driver * * Stop udc hw block and stay tunned for future transmissions */ @@ -4441,6 +4448,7 @@ static const struct usb_gadget_ops dwc2_hsotg_gadget_ops = { * @hsotg: The device state. * @hs_ep: The endpoint to be initialised. * @epnum: The endpoint number + * @dir_in: True if direction is in. * * Initialise the given endpoint (as part of the probe and device state * creation) to give to the gadget driver. Setup the endpoint name, any @@ -4514,7 +4522,7 @@ static void dwc2_hsotg_initep(struct dwc2_hsotg *hsotg, /** * dwc2_hsotg_hw_cfg - read HW configuration registers - * @param: The device state + * @hsotg: Programming view of the DWC_otg controller * * Read the USB core HW configuration registers */ @@ -4570,7 +4578,8 @@ static int dwc2_hsotg_hw_cfg(struct dwc2_hsotg *hsotg) /** * dwc2_hsotg_dump - dump state of the udc - * @param: The device state + * @hsotg: Programming view of the DWC_otg controller + * */ static void dwc2_hsotg_dump(struct dwc2_hsotg *hsotg) { @@ -4621,7 +4630,8 @@ static void dwc2_hsotg_dump(struct dwc2_hsotg *hsotg) /** * dwc2_gadget_init - init function for gadget - * @dwc2: The data structure for the DWC2 driver. + * @hsotg: Programming view of the DWC_otg controller + * */ int dwc2_gadget_init(struct dwc2_hsotg *hsotg) { @@ -4718,7 +4728,8 @@ int dwc2_gadget_init(struct dwc2_hsotg *hsotg) /** * dwc2_hsotg_remove - remove function for hsotg driver - * @pdev: The platform information for the driver + * @hsotg: Programming view of the DWC_otg controller + * */ int dwc2_hsotg_remove(struct dwc2_hsotg *hsotg) { @@ -4999,7 +5010,7 @@ int dwc2_gadget_enter_hibernation(struct dwc2_hsotg *hsotg) * * @hsotg: Programming view of the DWC_otg controller * @rem_wakeup: indicates whether resume is initiated by Device or Host. - * @param reset: indicates whether resume is initiated by Reset. + * @reset: indicates whether resume is initiated by Reset. * * Return non-zero if failed to exit from hibernation. */ diff --git a/drivers/usb/dwc2/hcd.c b/drivers/usb/dwc2/hcd.c index 190f959..0ccd4b2 100644 --- a/drivers/usb/dwc2/hcd.c +++ b/drivers/usb/dwc2/hcd.c @@ -592,7 +592,7 @@ u32 dwc2_calc_frame_interval(struct dwc2_hsotg *hsotg) * dwc2_read_packet() - Reads a packet from the Rx FIFO into the destination * buffer * - * @core_if: Programming view of DWC_otg controller + * @hsotg: Programming view of DWC_otg controller * @dest: Destination buffer for the packet * @bytes: Number of bytes to copy to the destination */ @@ -4082,7 +4082,6 @@ static struct dwc2_hsotg *dwc2_hcd_to_hsotg(struct usb_hcd *hcd) * then the refcount for the structure will go to 0 and we'll free it. * * @hsotg: The HCD state structure for the DWC OTG controller. - * @qh: The QH structure. * @context: The priv pointer from a struct dwc2_hcd_urb. * @mem_flags: Flags for allocating memory. * @ttport: We'll return this device's port number here. That's used to diff --git a/drivers/usb/dwc2/hcd.h b/drivers/usb/dwc2/hcd.h index 96a9da5..7db1ee7 100644 --- a/drivers/usb/dwc2/hcd.h +++ b/drivers/usb/dwc2/hcd.h @@ -80,7 +80,7 @@ struct dwc2_qh; * @xfer_count: Number of bytes transferred so far * @start_pkt_count: Packet count at start of transfer * @xfer_started: True if the transfer has been started - * @ping: True if a PING request should be issued on this channel + * @do_ping: True if a PING request should be issued on this channel * @error_state: True if the error count for this transaction is non-zero * @halt_on_queue: True if this channel should be halted the next time a * request is queued for the channel. This is necessary in @@ -102,7 +102,7 @@ struct dwc2_qh; * @schinfo: Scheduling micro-frame bitmap * @ntd: Number of transfer descriptors for the transfer * @halt_status: Reason for halting the host channel - * @hcint Contents of the HCINT register when the interrupt came + * @hcint: Contents of the HCINT register when the interrupt came * @qh: QH for the transfer being processed by this channel * @hc_list_entry: For linking to list of host channels * @desc_list_addr: Current QH's descriptor list DMA address @@ -237,7 +237,7 @@ struct dwc2_tt { /** * struct dwc2_hs_transfer_time - Info about a transfer on the high speed bus. * - * @start_schedule_usecs: The start time on the main bus schedule. Note that + * @start_schedule_us: The start time on the main bus schedule. Note that * the main bus schedule is tightly packed and this * time should be interpreted as tightly packed (so * uFrame 0 starts at 0 us, uFrame 1 starts at 100 us @@ -301,7 +301,6 @@ struct dwc2_hs_transfer_time { * "struct dwc2_tt". Not used if this device is high * speed. Note that this is in "schedule slice" which * is tightly packed. - * @ls_duration_us: Duration on the low speed bus schedule. * @ntd: Actual number of transfer descriptors in a list * @qtd_list: List of QTDs for this QH * @channel: Host channel currently processing transfers for this QH @@ -315,7 +314,7 @@ struct dwc2_hs_transfer_time { * descriptor * @unreserve_timer: Timer for releasing periodic reservation. * @wait_timer: Timer used to wait before re-queuing. - * @dwc2_tt: Pointer to our tt info (or NULL if no tt). + * @dwc_tt: Pointer to our tt info (or NULL if no tt). * @ttport: Port number within our tt. * @tt_buffer_dirty True if clear_tt_buffer_complete is pending * @unreserve_pending: True if we planned to unreserve but haven't yet. @@ -325,6 +324,7 @@ struct dwc2_hs_transfer_time { * periodic transfers and is ignored for periodic ones. * @wait_timer_cancel: Set to true to cancel the wait_timer. * + * @tt_buffer_dirty: True if EP's TT buffer is not clean. * A Queue Head (QH) holds the static characteristics of an endpoint and * maintains a list of transfers (QTDs) for that endpoint. A QH structure may * be entered in either the non-periodic or periodic schedule. @@ -400,6 +400,10 @@ struct dwc2_qh { * @urb: URB for this transfer * @qh: Queue head for this QTD * @qtd_list_entry: For linking to the QH's list of QTDs + * @isoc_td_first: Index of first activated isochronous transfer + * descriptor in Descriptor DMA mode + * @isoc_td_last: Index of last activated isochronous transfer + * descriptor in Descriptor DMA mode * * A Queue Transfer Descriptor (QTD) holds the state of a bulk, control, * interrupt, or isochronous transfer. A single QTD is created for each URB diff --git a/drivers/usb/dwc2/hcd_ddma.c b/drivers/usb/dwc2/hcd_ddma.c index 28c8898..74f11c8 100644 --- a/drivers/usb/dwc2/hcd_ddma.c +++ b/drivers/usb/dwc2/hcd_ddma.c @@ -332,6 +332,7 @@ static void dwc2_release_channel_ddma(struct dwc2_hsotg *hsotg, * * @hsotg: The HCD state structure for the DWC OTG controller * @qh: The QH to init + * @mem_flags: Indicates the type of memory allocation * * Return: 0 if successful, negative error code otherwise * diff --git a/drivers/usb/dwc2/hcd_intr.c b/drivers/usb/dwc2/hcd_intr.c index a5dfd9d..fbea5e3 100644 --- a/drivers/usb/dwc2/hcd_intr.c +++ b/drivers/usb/dwc2/hcd_intr.c @@ -478,6 +478,12 @@ static u32 dwc2_get_actual_xfer_length(struct dwc2_hsotg *hsotg, * of the URB based on the number of bytes transferred via the host channel. * Sets the URB status if the data transfer is finished. * + * @hsotg: Programming view of the DWC_otg controller + * @chan: Programming view of host channel + * @chnum: Channel number + * @urb: Processing URB + * @qtd: Queue transfer descriptor + * * Return: 1 if the data transfer specified by the URB is completely finished, * 0 otherwise */ @@ -566,6 +572,12 @@ void dwc2_hcd_save_data_toggle(struct dwc2_hsotg *hsotg, * halt_status. Completes the Isochronous URB if all the URB frames have been * completed. * + * @hsotg: Programming view of the DWC_otg controller + * @chan: Programming view of host channel + * @chnum: Channel number + * @halt_status: Reason for halting a host channel + * @qtd: Queue transfer descriptor + * * Return: DWC2_HC_XFER_COMPLETE if there are more frames remaining to be * transferred in the URB. Otherwise return DWC2_HC_XFER_URB_COMPLETE. */ diff --git a/drivers/usb/dwc2/hcd_queue.c b/drivers/usb/dwc2/hcd_queue.c index e34ad5e..d7c3d6c 100644 --- a/drivers/usb/dwc2/hcd_queue.c +++ b/drivers/usb/dwc2/hcd_queue.c @@ -679,6 +679,7 @@ static int dwc2_hs_pmap_schedule(struct dwc2_hsotg *hsotg, struct dwc2_qh *qh, * * @hsotg: The HCD state structure for the DWC OTG controller. * @qh: QH for the periodic transfer. + * @index: Transfer index */ static void dwc2_hs_pmap_unschedule(struct dwc2_hsotg *hsotg, struct dwc2_qh *qh, int index) @@ -1276,7 +1277,7 @@ static void dwc2_do_unreserve(struct dwc2_hsotg *hsotg, struct dwc2_qh *qh) * release the reservation. This worker is called after the appropriate * delay. * - * @work: Pointer to a qh unreserve_work. + * @t: Address to a qh unreserve_work. */ static void dwc2_unreserve_timer_fn(struct timer_list *t) { @@ -1631,7 +1632,7 @@ static void dwc2_qh_init(struct dwc2_hsotg *hsotg, struct dwc2_qh *qh, * @hsotg: The HCD state structure for the DWC OTG controller * @urb: Holds the information about the device/endpoint needed * to initialize the QH - * @atomic_alloc: Flag to do atomic allocation if needed + * @mem_flags: Flags for allocating memory. * * Return: Pointer to the newly allocated QH, or NULL on error */ diff --git a/drivers/usb/dwc2/params.c b/drivers/usb/dwc2/params.c index 2700f52..b43d8c6 100644 --- a/drivers/usb/dwc2/params.c +++ b/drivers/usb/dwc2/params.c @@ -269,6 +269,9 @@ static void dwc2_set_param_power_down(struct dwc2_hsotg *hsotg) /** * dwc2_set_default_params() - Set all core parameters to their * auto-detected default values. + * + * @hsotg: Programming view of the DWC_otg controller + * */ static void dwc2_set_default_params(struct dwc2_hsotg *hsotg) { @@ -339,6 +342,8 @@ static void dwc2_set_default_params(struct dwc2_hsotg *hsotg) /** * dwc2_get_device_properties() - Read in device properties. * + * @hsotg: Programming view of the DWC_otg controller + * * Read in the device properties and adjust core parameters if needed. */ static void dwc2_get_device_properties(struct dwc2_hsotg *hsotg) @@ -690,6 +695,9 @@ static void dwc2_get_dev_hwparams(struct dwc2_hsotg *hsotg) /** * During device initialization, read various hardware configuration * registers and interpret the contents. + * + * @hsotg: Programming view of the DWC_otg controller + * */ int dwc2_get_hwparams(struct dwc2_hsotg *hsotg) { diff --git a/drivers/usb/dwc2/pci.c b/drivers/usb/dwc2/pci.c index 7f21747..e9e26f0 100644 --- a/drivers/usb/dwc2/pci.c +++ b/drivers/usb/dwc2/pci.c @@ -77,6 +77,12 @@ static int dwc2_pci_quirks(struct pci_dev *pdev, struct platform_device *dwc2) return 0; } +/** + * dwc2_pci_probe() - Provides the cleanup entry points for the DWC_otg PCI + * driver + * + * @pci: The programming view of DWC_otg PCI + */ static void dwc2_pci_remove(struct pci_dev *pci) { struct dwc2_pci_glue *glue = pci_get_drvdata(pci); -- cgit v1.1 From d98c624ab3bf9c3c988c3b7d0f24e703061a172f Mon Sep 17 00:00:00 2001 From: John Stultz Date: Fri, 18 May 2018 17:49:03 -0700 Subject: usb: dwc2: Fix HiKey regression caused by power_down feature In 4.17-rc, commit 03ea6d6e9e1f ("usb: dwc2: Enable power down") caused the HiKey board to not correctly handle switching between usb-gadget and usb-host mode. Unplugging the OTG port would result in: [ 42.240973] dwc2 f72c0000.usb: dwc2_restore_host_registers: no host registers to restore [ 42.249066] dwc2 f72c0000.usb: dwc2_host_exit_hibernation: failed to restore host registers And the USB-host ports would not function. And plugging in the OTG port, we would see: [ 46.046557] WARNING: CPU: 3 PID: 6 at drivers/usb/dwc2/gadget.c:260 dwc2_hsotg_init_fifo+0x194/0x1a0 [ 46.055761] CPU: 3 PID: 6 Comm: kworker/u16:0 Not tainted 4.17.0-rc5-00030-ge67da8c #231 [ 46.055767] Hardware name: HiKey Development Board (DT) [ 46.055784] Workqueue: dwc2 dwc2_conn_id_status_change ... Thus, this patch sets the hisi params to disable the power_down flag by default, and gets thing working again. Cc: John Youn Cc: Vardan Mikayelyan Cc: Artur Petrosyan Cc: Grigor Tovmasyan Cc: Felipe Balbi Cc: linux-usb@vger.kernel.org Signed-off-by: John Stultz Signed-off-by: Felipe Balbi --- drivers/usb/dwc2/params.c | 1 + 1 file changed, 1 insertion(+) (limited to 'drivers/usb') diff --git a/drivers/usb/dwc2/params.c b/drivers/usb/dwc2/params.c index b43d8c6..a24ba13 100644 --- a/drivers/usb/dwc2/params.c +++ b/drivers/usb/dwc2/params.c @@ -70,6 +70,7 @@ static void dwc2_set_his_params(struct dwc2_hsotg *hsotg) GAHBCFG_HBSTLEN_SHIFT; p->uframe_sched = false; p->change_speed_quirk = true; + p->power_down = false; } static void dwc2_set_rk_params(struct dwc2_hsotg *hsotg) -- cgit v1.1 From 43a6dc94213ede7bb531d367292d99b1443ec9ed Mon Sep 17 00:00:00 2001 From: Luc Van Oostenryck Date: Tue, 24 Apr 2018 15:18:41 +0200 Subject: usb: gadget: f_phonet: fix pn_net_xmit()'s return type The method ndo_start_xmit() is defined as returning an 'netdev_tx_t', which is a typedef for an enum type, but the implementation in this driver returns an 'int'. Fix this by returning 'netdev_tx_t' in this driver too. Signed-off-by: Luc Van Oostenryck Signed-off-by: Felipe Balbi --- drivers/usb/gadget/function/f_phonet.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers/usb') diff --git a/drivers/usb/gadget/function/f_phonet.c b/drivers/usb/gadget/function/f_phonet.c index 7889bcc..8b72b19 100644 --- a/drivers/usb/gadget/function/f_phonet.c +++ b/drivers/usb/gadget/function/f_phonet.c @@ -221,7 +221,7 @@ static void pn_tx_complete(struct usb_ep *ep, struct usb_request *req) netif_wake_queue(dev); } -static int pn_net_xmit(struct sk_buff *skb, struct net_device *dev) +static netdev_tx_t pn_net_xmit(struct sk_buff *skb, struct net_device *dev) { struct phonet_port *port = netdev_priv(dev); struct f_phonet *fp; -- cgit v1.1 From a7ef207424d0149f34d286f21d3134759b1efe2e Mon Sep 17 00:00:00 2001 From: Tomeu Vizoso Date: Mon, 26 Mar 2018 11:00:01 +0200 Subject: usb: dwc2: dwc2_vbus_supply_init: fix error check devm_regulator_get_optional returns -ENODEV if the regulator isn't there, so if that's the case we have to make sure not to leave -ENODEV in the regulator pointer. Also, make sure we return 0 in that case, but correctly propagate any other errors. Also propagate the error from _dwc2_hcd_start. Fixes: 531ef5ebea96 ("usb: dwc2: add support for host mode external vbus supply") Cc: Amelie Delaunay Reviewed-by: Amelie Delaunay Reviewed-by: Heiko Stuebner Reviewed-by: Grigor Tovmasyan Tested-by: Heiko Stuebner Acked-by: Minas Harutyunyan Signed-off-by: Tomeu Vizoso Signed-off-by: Felipe Balbi --- drivers/usb/dwc2/hcd.c | 13 ++++++++----- 1 file changed, 8 insertions(+), 5 deletions(-) (limited to 'drivers/usb') diff --git a/drivers/usb/dwc2/hcd.c b/drivers/usb/dwc2/hcd.c index 0ccd4b2..1faefea 100644 --- a/drivers/usb/dwc2/hcd.c +++ b/drivers/usb/dwc2/hcd.c @@ -358,9 +358,14 @@ static void dwc2_gusbcfg_init(struct dwc2_hsotg *hsotg) static int dwc2_vbus_supply_init(struct dwc2_hsotg *hsotg) { + int ret; + hsotg->vbus_supply = devm_regulator_get_optional(hsotg->dev, "vbus"); - if (IS_ERR(hsotg->vbus_supply)) - return 0; + if (IS_ERR(hsotg->vbus_supply)) { + ret = PTR_ERR(hsotg->vbus_supply); + hsotg->vbus_supply = NULL; + return ret == -ENODEV ? 0 : ret; + } return regulator_enable(hsotg->vbus_supply); } @@ -4341,9 +4346,7 @@ static int _dwc2_hcd_start(struct usb_hcd *hcd) spin_unlock_irqrestore(&hsotg->lock, flags); - dwc2_vbus_supply_init(hsotg); - - return 0; + return dwc2_vbus_supply_init(hsotg); } /* -- cgit v1.1 From 5295322a069af309b8fd62dc923e5b407aa83688 Mon Sep 17 00:00:00 2001 From: Artur Petrosyan Date: Mon, 16 Apr 2018 08:45:31 -0400 Subject: usb: dwc2: WA for Full speed ISOC IN in DDMA mode. By clearing NAK status of EP, core will send ZLP to IN token and assert NAK interrupt relying on TxFIFO status only. The WA applies only to core versions from 2.72a to 4.00a (including both). Also for FS_IOT_1.00a and HS_IOT_1.00a. Signed-off-by: Artur Petrosyan Signed-off-by: Minas Harutyunyan Signed-off-by: Felipe Balbi --- drivers/usb/dwc2/core.h | 2 ++ drivers/usb/dwc2/gadget.c | 21 +++++++++++++++++++++ 2 files changed, 23 insertions(+) (limited to 'drivers/usb') diff --git a/drivers/usb/dwc2/core.h b/drivers/usb/dwc2/core.h index 6d304e9..4a56ac7 100644 --- a/drivers/usb/dwc2/core.h +++ b/drivers/usb/dwc2/core.h @@ -1102,6 +1102,7 @@ struct dwc2_hsotg { /* DWC OTG HW Release versions */ #define DWC2_CORE_REV_2_71a 0x4f54271a +#define DWC2_CORE_REV_2_72a 0x4f54272a #define DWC2_CORE_REV_2_80a 0x4f54280a #define DWC2_CORE_REV_2_90a 0x4f54290a #define DWC2_CORE_REV_2_91a 0x4f54291a @@ -1109,6 +1110,7 @@ struct dwc2_hsotg { #define DWC2_CORE_REV_2_94a 0x4f54294a #define DWC2_CORE_REV_3_00a 0x4f54300a #define DWC2_CORE_REV_3_10a 0x4f54310a +#define DWC2_CORE_REV_4_00a 0x4f54400a #define DWC2_FS_IOT_REV_1_00a 0x5531100a #define DWC2_HS_IOT_REV_1_00a 0x5532100a diff --git a/drivers/usb/dwc2/gadget.c b/drivers/usb/dwc2/gadget.c index 684b4f5..f0d9ccf 100644 --- a/drivers/usb/dwc2/gadget.c +++ b/drivers/usb/dwc2/gadget.c @@ -3945,6 +3945,27 @@ static int dwc2_hsotg_ep_enable(struct usb_ep *ep, if (index && !hs_ep->isochronous) epctrl |= DXEPCTL_SETD0PID; + /* WA for Full speed ISOC IN in DDMA mode. + * By Clear NAK status of EP, core will send ZLP + * to IN token and assert NAK interrupt relying + * on TxFIFO status only + */ + + if (hsotg->gadget.speed == USB_SPEED_FULL && + hs_ep->isochronous && dir_in) { + /* The WA applies only to core versions from 2.72a + * to 4.00a (including both). Also for FS_IOT_1.00a + * and HS_IOT_1.00a. + */ + u32 gsnpsid = dwc2_readl(hsotg->regs + GSNPSID); + + if ((gsnpsid >= DWC2_CORE_REV_2_72a && + gsnpsid <= DWC2_CORE_REV_4_00a) || + gsnpsid == DWC2_FS_IOT_REV_1_00a || + gsnpsid == DWC2_HS_IOT_REV_1_00a) + epctrl |= DXEPCTL_CNAK; + } + dev_dbg(hsotg->dev, "%s: write DxEPCTL=0x%08x\n", __func__, epctrl); -- cgit v1.1 From fe70dce97c1d8b4e5b2ea1d2396f3b78d29285bf Mon Sep 17 00:00:00 2001 From: Wei Yongjun Date: Wed, 28 Mar 2018 13:41:13 +0000 Subject: usb: dwc2: pci: Fix error return code in dwc2_pci_probe() Fix to return error code -ENOMEM from the alloc fail error handling case instead of 0, as done elsewhere in this function. Fixes: ecd29dabb2ba ("usb: dwc2: pci: Handle error cleanup in probe") Reviewed-by: Grigor Tovmasyan Acked-by: Minas Harutyunyan Signed-off-by: Wei Yongjun Signed-off-by: Felipe Balbi --- drivers/usb/dwc2/pci.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) (limited to 'drivers/usb') diff --git a/drivers/usb/dwc2/pci.c b/drivers/usb/dwc2/pci.c index e9e26f0..d257c54 100644 --- a/drivers/usb/dwc2/pci.c +++ b/drivers/usb/dwc2/pci.c @@ -147,8 +147,10 @@ static int dwc2_pci_probe(struct pci_dev *pci, goto err; glue = devm_kzalloc(dev, sizeof(*glue), GFP_KERNEL); - if (!glue) + if (!glue) { + ret = -ENOMEM; goto err; + } ret = platform_device_add(dwc2); if (ret) { -- cgit v1.1 From 691025107eb7544fdd25f836c8c6e857a344828b Mon Sep 17 00:00:00 2001 From: Wei Yongjun Date: Thu, 29 Mar 2018 02:20:10 +0000 Subject: usb: dwc3: gadget: dwc3_gadget_del_and_unmap_request() can be static Fixes the following sparse warning: drivers/usb/dwc3/gadget.c:169:6: warning: symbol 'dwc3_gadget_del_and_unmap_request' was not declared. Should it be static? Signed-off-by: Wei Yongjun Signed-off-by: Felipe Balbi --- drivers/usb/dwc3/gadget.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers/usb') diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c index 4ca593c..eeb3013 100644 --- a/drivers/usb/dwc3/gadget.c +++ b/drivers/usb/dwc3/gadget.c @@ -169,7 +169,7 @@ static void dwc3_ep_inc_deq(struct dwc3_ep *dep) dwc3_ep_inc_trb(&dep->trb_dequeue); } -void dwc3_gadget_del_and_unmap_request(struct dwc3_ep *dep, +static void dwc3_gadget_del_and_unmap_request(struct dwc3_ep *dep, struct dwc3_request *req, int status) { struct dwc3 *dwc = dep->dwc; -- cgit v1.1 From 05645366f3893c160bd39ca49f3fe2f2f026f58b Mon Sep 17 00:00:00 2001 From: Mayank Rana Date: Fri, 23 Mar 2018 10:05:33 -0700 Subject: usb: dwc3: gadget: Fix list_del corruption in dwc3_ep_dequeue dwc3_ep_dequeue() waits for completion of End Transfer command using wait_event_lock_irq(), which will release the dwc3->lock while waiting and reacquire after completion. This allows a potential race condition with ep_disable() which also removes all requests from started_list and pending_list. The check for NULL r->trb should catch this but currently it exits to the wrong 'out1' label which calls dwc3_gadget_giveback(). Since its list entry was already removed, if CONFIG_DEBUG_LIST is enabled a 'list_del corruption' bug is thrown since its next/prev pointers are already LIST_POISON1/2. If r->trb is NULL it should simply exit to 'out0'. Fixes: cf3113d893d4 ("usb: dwc3: gadget: properly increment dequeue pointer on ep_dequeue") Cc: stable@vger.kernel.org # v4.12+ Signed-off-by: Mayank Rana Signed-off-by: Jack Pham Signed-off-by: Felipe Balbi --- drivers/usb/dwc3/gadget.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers/usb') diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c index eeb3013..69bf137 100644 --- a/drivers/usb/dwc3/gadget.c +++ b/drivers/usb/dwc3/gadget.c @@ -1395,7 +1395,7 @@ static int dwc3_gadget_ep_dequeue(struct usb_ep *ep, dwc->lock); if (!r->trb) - goto out1; + goto out0; if (r->num_pending_sgs) { struct dwc3_trb *trb; -- cgit v1.1 From 1990cf7c21ea185cec98c6d45a82c04481261e35 Mon Sep 17 00:00:00 2001 From: Yoshihiro Shimoda Date: Tue, 10 Apr 2018 14:38:50 +0900 Subject: usb: gadget: udc: renesas_usb3: should remove debugfs This patch fixes an issue that this driver doesn't remove its debugfs. Fixes: 43ba968b00ea ("usb: gadget: udc: renesas_usb3: add debugfs to set the b-device mode") Cc: # v4.14+ Signed-off-by: Yoshihiro Shimoda Reviewed-by: Simon Horman Signed-off-by: Felipe Balbi --- drivers/usb/gadget/udc/renesas_usb3.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) (limited to 'drivers/usb') diff --git a/drivers/usb/gadget/udc/renesas_usb3.c b/drivers/usb/gadget/udc/renesas_usb3.c index 409cde4..4ef2386 100644 --- a/drivers/usb/gadget/udc/renesas_usb3.c +++ b/drivers/usb/gadget/udc/renesas_usb3.c @@ -333,6 +333,7 @@ struct renesas_usb3 { struct extcon_dev *extcon; struct work_struct extcon_work; struct phy *phy; + struct dentry *dentry; struct renesas_usb3_ep *usb3_ep; int num_usb3_eps; @@ -2393,8 +2394,12 @@ static void renesas_usb3_debugfs_init(struct renesas_usb3 *usb3, file = debugfs_create_file("b_device", 0644, root, usb3, &renesas_usb3_b_device_fops); - if (!file) + if (!file) { dev_info(dev, "%s: Can't create debugfs mode\n", __func__); + debugfs_remove_recursive(root); + } else { + usb3->dentry = root; + } } /*------- platform_driver ------------------------------------------------*/ @@ -2402,6 +2407,7 @@ static int renesas_usb3_remove(struct platform_device *pdev) { struct renesas_usb3 *usb3 = platform_get_drvdata(pdev); + debugfs_remove_recursive(usb3->dentry); device_remove_file(&pdev->dev, &dev_attr_role); usb_del_gadget_udc(&usb3->gadget); -- cgit v1.1 From d998844016b24a8d71b9aa5eae7e51d70f2de438 Mon Sep 17 00:00:00 2001 From: Yoshihiro Shimoda Date: Tue, 10 Apr 2018 14:38:51 +0900 Subject: usb: gadget: udc: renesas_usb3: should call pm_runtime_enable() before add udc This patch fixes an issue that this driver causes panic if a gadget driver is already loaded because usb_add_gadget_udc() might call renesas_usb3_start() via .udc_start, and then pm_runtime_get_sync() in renesas_usb3_start() doesn't work correctly. Note that the usb3_to_dev() macro should not be called at this timing because the macro uses the gadget structure. Fixes: cf06df3fae28 ("usb: gadget: udc: renesas_usb3: move pm_runtime_{en,dis}able()") Cc: # v4.15+ Signed-off-by: Yoshihiro Shimoda Reviewed-by: Simon Horman Signed-off-by: Felipe Balbi --- drivers/usb/gadget/udc/renesas_usb3.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers/usb') diff --git a/drivers/usb/gadget/udc/renesas_usb3.c b/drivers/usb/gadget/udc/renesas_usb3.c index 4ef2386..8bf3ae1 100644 --- a/drivers/usb/gadget/udc/renesas_usb3.c +++ b/drivers/usb/gadget/udc/renesas_usb3.c @@ -2634,6 +2634,7 @@ static int renesas_usb3_probe(struct platform_device *pdev) if (ret < 0) goto err_alloc_prd; + pm_runtime_enable(&pdev->dev); ret = usb_add_gadget_udc(&pdev->dev, &usb3->gadget); if (ret < 0) goto err_add_udc; @@ -2655,7 +2656,6 @@ static int renesas_usb3_probe(struct platform_device *pdev) renesas_usb3_debugfs_init(usb3, &pdev->dev); dev_info(&pdev->dev, "probed%s\n", usb3->phy ? " with phy" : ""); - pm_runtime_enable(usb3_to_dev(usb3)); return 0; -- cgit v1.1 From 003bc1dee216b1fb8e02040a95672bea0f1fe797 Mon Sep 17 00:00:00 2001 From: Yoshihiro Shimoda Date: Tue, 10 Apr 2018 14:38:52 +0900 Subject: usb: gadget: udc: renesas_usb3: should call devm_phy_get() before add udc This patch fixes an issue that this driver cannot call phy_init() if a gadget driver is alreadly loaded because usb_add_gadget_udc() might call renesas_usb3_start() via .udc_start. This patch also revises the typo (s/an optional/optional/). Fixes: 279d4bc64060 ("usb: gadget: udc: renesas_usb3: add support for generic phy") Cc: # v4.15+ Signed-off-by: Yoshihiro Shimoda Reviewed-by: Simon Horman Signed-off-by: Felipe Balbi --- drivers/usb/gadget/udc/renesas_usb3.c | 16 ++++++++-------- 1 file changed, 8 insertions(+), 8 deletions(-) (limited to 'drivers/usb') diff --git a/drivers/usb/gadget/udc/renesas_usb3.c b/drivers/usb/gadget/udc/renesas_usb3.c index 8bf3ae1..61b72ed 100644 --- a/drivers/usb/gadget/udc/renesas_usb3.c +++ b/drivers/usb/gadget/udc/renesas_usb3.c @@ -2634,6 +2634,14 @@ static int renesas_usb3_probe(struct platform_device *pdev) if (ret < 0) goto err_alloc_prd; + /* + * This is optional. So, if this driver cannot get a phy, + * this driver will not handle a phy anymore. + */ + usb3->phy = devm_phy_get(&pdev->dev, "usb"); + if (IS_ERR(usb3->phy)) + usb3->phy = NULL; + pm_runtime_enable(&pdev->dev); ret = usb_add_gadget_udc(&pdev->dev, &usb3->gadget); if (ret < 0) @@ -2643,14 +2651,6 @@ static int renesas_usb3_probe(struct platform_device *pdev) if (ret < 0) goto err_dev_create; - /* - * This is an optional. So, if this driver cannot get a phy, - * this driver will not handle a phy anymore. - */ - usb3->phy = devm_phy_get(&pdev->dev, "usb"); - if (IS_ERR(usb3->phy)) - usb3->phy = NULL; - usb3->workaround_for_vbus = priv->workaround_for_vbus; renesas_usb3_debugfs_init(usb3, &pdev->dev); -- cgit v1.1 From 0259068f63f23a665ded28647f2f9cdb6b20dc72 Mon Sep 17 00:00:00 2001 From: Yoshihiro Shimoda Date: Tue, 10 Apr 2018 14:38:53 +0900 Subject: usb: gadget: udc: renesas_usb3: should fail if devm_phy_get() returns error This patch fixes an issue that this driver ignores errors other than the non-existence of the device, f.e. a memory allocation failure in devm_phy_get(). So, this patch replaces devm_phy_get() with devm_phy_optional_get(). Reported-by: Simon Horman Fixes: 279d4bc64060 ("usb: gadget: udc: renesas_usb3: add support for generic phy") Cc: # v4.15+ Reviewed-by: Simon Horman Signed-off-by: Yoshihiro Shimoda Signed-off-by: Felipe Balbi --- drivers/usb/gadget/udc/renesas_usb3.c | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-) (limited to 'drivers/usb') diff --git a/drivers/usb/gadget/udc/renesas_usb3.c b/drivers/usb/gadget/udc/renesas_usb3.c index 61b72ed..5d5a5d9 100644 --- a/drivers/usb/gadget/udc/renesas_usb3.c +++ b/drivers/usb/gadget/udc/renesas_usb3.c @@ -2638,9 +2638,11 @@ static int renesas_usb3_probe(struct platform_device *pdev) * This is optional. So, if this driver cannot get a phy, * this driver will not handle a phy anymore. */ - usb3->phy = devm_phy_get(&pdev->dev, "usb"); - if (IS_ERR(usb3->phy)) - usb3->phy = NULL; + usb3->phy = devm_phy_optional_get(&pdev->dev, "usb"); + if (IS_ERR(usb3->phy)) { + ret = PTR_ERR(usb3->phy); + goto err_add_udc; + } pm_runtime_enable(&pdev->dev); ret = usb_add_gadget_udc(&pdev->dev, &usb3->gadget); -- cgit v1.1 From bd6bce004d78b867ba0c6d3712f1c5b50398af9a Mon Sep 17 00:00:00 2001 From: Yoshihiro Shimoda Date: Tue, 10 Apr 2018 14:38:54 +0900 Subject: usb: gadget: udc: renesas_usb3: disable the controller's irqs for reconnecting This patch fixes an issue that reconnection is possible to fail because unexpected state handling happens by the irqs. To fix the issue, the driver disables the controller's irqs when disconnected. Fixes: 746bfe63bba3 ("usb: gadget: renesas_usb3: add support for Renesas USB3.0 peripheral controller") Cc: # v4.5+ Reviewed-by: Simon Horman Signed-off-by: Yoshihiro Shimoda Signed-off-by: Felipe Balbi --- drivers/usb/gadget/udc/renesas_usb3.c | 7 +++++++ 1 file changed, 7 insertions(+) (limited to 'drivers/usb') diff --git a/drivers/usb/gadget/udc/renesas_usb3.c b/drivers/usb/gadget/udc/renesas_usb3.c index 5d5a5d9..2bb2cca 100644 --- a/drivers/usb/gadget/udc/renesas_usb3.c +++ b/drivers/usb/gadget/udc/renesas_usb3.c @@ -623,6 +623,13 @@ static void usb3_disconnect(struct renesas_usb3 *usb3) usb3_usb2_pullup(usb3, 0); usb3_clear_bit(usb3, USB30_CON_B3_CONNECT, USB3_USB30_CON); usb3_reset_epc(usb3); + usb3_disable_irq_1(usb3, USB_INT_1_B2_RSUM | USB_INT_1_B3_PLLWKUP | + USB_INT_1_B3_LUPSUCS | USB_INT_1_B3_DISABLE | + USB_INT_1_SPEED | USB_INT_1_B3_WRMRST | + USB_INT_1_B3_HOTRST | USB_INT_1_B2_SPND | + USB_INT_1_B2_L1SPND | USB_INT_1_B2_USBRST); + usb3_clear_bit(usb3, USB_COM_CON_SPD_MODE, USB3_USB_COM_CON); + usb3_init_epc_registers(usb3); if (usb3->driver) usb3->driver->disconnect(&usb3->gadget); -- cgit v1.1 From 8223b2f89ca63e203dcb54148e30d94979f17b0b Mon Sep 17 00:00:00 2001 From: Yoshihiro Shimoda Date: Mon, 2 Apr 2018 21:21:31 +0900 Subject: usb: gadget: udc: renesas_usb3: fix double phy_put() This patch fixes an issue that this driver cause double phy_put() calling. This driver must not call phy_put() in the remove because the driver calls devm_phy_get() in the probe. Fixes: 279d4bc64060 ("usb: gadget: udc: renesas_usb3: add support for generic phy") Cc: # v4.15+ Reviewed-by: Simon Horman Signed-off-by: Yoshihiro Shimoda Signed-off-by: Felipe Balbi --- drivers/usb/gadget/udc/renesas_usb3.c | 2 -- 1 file changed, 2 deletions(-) (limited to 'drivers/usb') diff --git a/drivers/usb/gadget/udc/renesas_usb3.c b/drivers/usb/gadget/udc/renesas_usb3.c index 2bb2cca..5caf78b 100644 --- a/drivers/usb/gadget/udc/renesas_usb3.c +++ b/drivers/usb/gadget/udc/renesas_usb3.c @@ -2421,8 +2421,6 @@ static int renesas_usb3_remove(struct platform_device *pdev) renesas_usb3_dma_free_prd(usb3, &pdev->dev); __renesas_usb3_ep_free_request(usb3->ep0_req); - if (usb3->phy) - phy_put(usb3->phy); pm_runtime_disable(&pdev->dev); return 0; -- cgit v1.1 From 47265c067c0d129f3a0e94bc221293a780af9d78 Mon Sep 17 00:00:00 2001 From: Grigor Tovmasyan Date: Tue, 3 Apr 2018 15:22:25 +0400 Subject: usb: dwc2: gadget: Fix coverity issue When _param is unsigned and the minimum value of range is 0, it gives the following warning: COVERITY NO_EFFECT: This less-than-zero comparison of an unsigned value is never true. Converting ._param to int to avoid this warning. Signed-off-by: Grigor Tovmasyan Signed-off-by: Felipe Balbi --- drivers/usb/dwc2/params.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers/usb') diff --git a/drivers/usb/dwc2/params.c b/drivers/usb/dwc2/params.c index a24ba13..af075d4 100644 --- a/drivers/usb/dwc2/params.c +++ b/drivers/usb/dwc2/params.c @@ -556,7 +556,7 @@ static void dwc2_check_param_tx_fifo_sizes(struct dwc2_hsotg *hsotg) } #define CHECK_RANGE(_param, _min, _max, _def) do { \ - if ((hsotg->params._param) < (_min) || \ + if ((int)(hsotg->params._param) < (_min) || \ (hsotg->params._param) > (_max)) { \ dev_warn(hsotg->dev, "%s: Invalid parameter %s=%d\n", \ __func__, #_param, hsotg->params._param); \ -- cgit v1.1 From 5ada98427f12f5c19d6f93bfe02f23fe4531b978 Mon Sep 17 00:00:00 2001 From: Johan Hovold Date: Fri, 18 May 2018 15:25:47 +0200 Subject: USB: serial: ftdi_sio: fix IXON/IXOFF mixup Since forever this driver has had IXON and IXOFF mixed up, and has used the latter rather than the former to enable hardware-assisted software flow control on output. Reviewed-by: Greg Kroah-Hartman Signed-off-by: Johan Hovold --- drivers/usb/serial/ftdi_sio.c | 8 ++------ 1 file changed, 2 insertions(+), 6 deletions(-) (limited to 'drivers/usb') diff --git a/drivers/usb/serial/ftdi_sio.c b/drivers/usb/serial/ftdi_sio.c index 7ea221d..62c9987 100644 --- a/drivers/usb/serial/ftdi_sio.c +++ b/drivers/usb/serial/ftdi_sio.c @@ -2342,12 +2342,8 @@ no_c_cflag_changes: } else { /* * Xon/Xoff code - * - * Check the IXOFF status in the iflag component of the - * termios structure. If IXOFF is not set, the pre-xon/xoff - * code is executed. */ - if (iflag & IXOFF) { + if (iflag & IXON) { dev_dbg(ddev, "%s request to enable xonxoff iflag=%04x\n", __func__, iflag); /* Try to enable the XON/XOFF on the ftdi_sio @@ -2372,7 +2368,7 @@ no_c_cflag_changes: } } else { /* else clause to only run if cflag ! CRTSCTS and iflag - * ! XOFF. CHECKME Assuming XON/XOFF handled by tty + * ! XON. CHECKME Assuming XON/XOFF handled by tty * stack - not by device */ dev_dbg(ddev, "%s Turning off hardware flow control\n", __func__); if (usb_control_msg(dev, -- cgit v1.1 From fd54a99aec18fe47c3035a38815bcbeba09100cc Mon Sep 17 00:00:00 2001 From: Johan Hovold Date: Fri, 18 May 2018 15:25:48 +0200 Subject: USB: serial: ftdi_sio: use non-underscore fixed types Replace all __u types with their u counterparts throughout the driver (whose structures are not exported to user space). Reviewed-by: Greg Kroah-Hartman Signed-off-by: Johan Hovold --- drivers/usb/serial/ftdi_sio.c | 50 +++++++++++++++++++++---------------------- 1 file changed, 25 insertions(+), 25 deletions(-) (limited to 'drivers/usb') diff --git a/drivers/usb/serial/ftdi_sio.c b/drivers/usb/serial/ftdi_sio.c index 62c9987..0d24da0 100644 --- a/drivers/usb/serial/ftdi_sio.c +++ b/drivers/usb/serial/ftdi_sio.c @@ -54,7 +54,7 @@ struct ftdi_private { int custom_divisor; /* custom_divisor kludge, this is for baud_base (different from what goes to the chip!) */ - __u16 last_set_data_urb_value ; + u16 last_set_data_urb_value; /* the last data state set - needed for doing * a break */ @@ -62,7 +62,7 @@ struct ftdi_private { unsigned long last_dtr_rts; /* saved modem control outputs */ char prev_status; /* Used for TIOCMIWAIT */ char transmit_empty; /* If transmitter is empty or not */ - __u16 interface; /* FT2232C, FT2232H or FT4232H port interface + u16 interface; /* FT2232C, FT2232H or FT4232H port interface (0 for FT232/245) */ speed_t force_baud; /* if non-zero, force the baud rate to @@ -1063,10 +1063,10 @@ static int ftdi_get_modem_status(struct usb_serial_port *port, static unsigned short int ftdi_232am_baud_base_to_divisor(int baud, int base); static unsigned short int ftdi_232am_baud_to_divisor(int baud); -static __u32 ftdi_232bm_baud_base_to_divisor(int baud, int base); -static __u32 ftdi_232bm_baud_to_divisor(int baud); -static __u32 ftdi_2232h_baud_base_to_divisor(int baud, int base); -static __u32 ftdi_2232h_baud_to_divisor(int baud); +static u32 ftdi_232bm_baud_base_to_divisor(int baud, int base); +static u32 ftdi_232bm_baud_to_divisor(int baud); +static u32 ftdi_2232h_baud_base_to_divisor(int baud, int base); +static u32 ftdi_2232h_baud_to_divisor(int baud); static struct usb_serial_driver ftdi_sio_device = { .driver = { @@ -1136,14 +1136,14 @@ static unsigned short int ftdi_232am_baud_to_divisor(int baud) return ftdi_232am_baud_base_to_divisor(baud, 48000000); } -static __u32 ftdi_232bm_baud_base_to_divisor(int baud, int base) +static u32 ftdi_232bm_baud_base_to_divisor(int baud, int base) { static const unsigned char divfrac[8] = { 0, 3, 2, 4, 1, 5, 6, 7 }; - __u32 divisor; + u32 divisor; /* divisor shifted 3 bits to the left */ int divisor3 = base / 2 / baud; divisor = divisor3 >> 3; - divisor |= (__u32)divfrac[divisor3 & 0x7] << 14; + divisor |= (u32)divfrac[divisor3 & 0x7] << 14; /* Deal with special cases for highest baud rates. */ if (divisor == 1) divisor = 0; @@ -1152,22 +1152,22 @@ static __u32 ftdi_232bm_baud_base_to_divisor(int baud, int base) return divisor; } -static __u32 ftdi_232bm_baud_to_divisor(int baud) +static u32 ftdi_232bm_baud_to_divisor(int baud) { return ftdi_232bm_baud_base_to_divisor(baud, 48000000); } -static __u32 ftdi_2232h_baud_base_to_divisor(int baud, int base) +static u32 ftdi_2232h_baud_base_to_divisor(int baud, int base) { static const unsigned char divfrac[8] = { 0, 3, 2, 4, 1, 5, 6, 7 }; - __u32 divisor; + u32 divisor; int divisor3; /* hi-speed baud rate is 10-bit sampling instead of 16-bit */ divisor3 = base * 8 / (baud * 10); divisor = divisor3 >> 3; - divisor |= (__u32)divfrac[divisor3 & 0x7] << 14; + divisor |= (u32)divfrac[divisor3 & 0x7] << 14; /* Deal with special cases for highest baud rates. */ if (divisor == 1) divisor = 0; @@ -1182,7 +1182,7 @@ static __u32 ftdi_2232h_baud_base_to_divisor(int baud, int base) return divisor; } -static __u32 ftdi_2232h_baud_to_divisor(int baud) +static u32 ftdi_2232h_baud_to_divisor(int baud) { return ftdi_2232h_baud_base_to_divisor(baud, 120000000); } @@ -1236,12 +1236,12 @@ static int update_mctrl(struct usb_serial_port *port, unsigned int set, } -static __u32 get_ftdi_divisor(struct tty_struct *tty, +static u32 get_ftdi_divisor(struct tty_struct *tty, struct usb_serial_port *port) { struct ftdi_private *priv = usb_get_serial_port_data(port); struct device *dev = &port->dev; - __u32 div_value = 0; + u32 div_value = 0; int div_okay = 1; int baud; @@ -1299,7 +1299,7 @@ static __u32 get_ftdi_divisor(struct tty_struct *tty, case FT232RL: /* FT232RL chip */ case FTX: /* FT-X series */ if (baud <= 3000000) { - __u16 product_id = le16_to_cpu( + u16 product_id = le16_to_cpu( port->serial->dev->descriptor.idProduct); if (((product_id == FTDI_NDI_HUC_PID) || (product_id == FTDI_NDI_SPECTRA_SCU_PID) || @@ -1346,19 +1346,19 @@ static __u32 get_ftdi_divisor(struct tty_struct *tty, static int change_speed(struct tty_struct *tty, struct usb_serial_port *port) { struct ftdi_private *priv = usb_get_serial_port_data(port); - __u16 urb_value; - __u16 urb_index; - __u32 urb_index_value; + u16 urb_value; + u16 urb_index; + u32 urb_index_value; int rv; urb_index_value = get_ftdi_divisor(tty, port); - urb_value = (__u16)urb_index_value; - urb_index = (__u16)(urb_index_value >> 16); + urb_value = (u16)urb_index_value; + urb_index = (u16)(urb_index_value >> 16); if ((priv->chip_type == FT2232C) || (priv->chip_type == FT2232H) || (priv->chip_type == FT4232H) || (priv->chip_type == FT232H)) { /* Probably the BM type needs the MSB of the encoded fractional * divider also moved like for the chips above. Any infos? */ - urb_index = (__u16)((urb_index << 8) | priv->interface); + urb_index = (u16)((urb_index << 8) | priv->interface); } rv = usb_control_msg(port->serial->dev, @@ -2140,7 +2140,7 @@ static void ftdi_break_ctl(struct tty_struct *tty, int break_state) { struct usb_serial_port *port = tty->driver_data; struct ftdi_private *priv = usb_get_serial_port_data(port); - __u16 urb_value; + u16 urb_value; /* break_state = -1 to turn on break, and 0 to turn off break */ /* see drivers/char/tty_io.c to see it used */ @@ -2192,7 +2192,7 @@ static void ftdi_set_termios(struct tty_struct *tty, struct ftdi_private *priv = usb_get_serial_port_data(port); struct ktermios *termios = &tty->termios; unsigned int cflag = termios->c_cflag; - __u16 urb_value; /* will hold the new flags */ + u16 urb_value; /* will hold the new flags */ /* Added for xon/xoff support */ unsigned int iflag = termios->c_iflag; -- cgit v1.1 From 1641011549784699e013c7ccfebbd0d5a3dc41e7 Mon Sep 17 00:00:00 2001 From: Johan Hovold Date: Fri, 18 May 2018 15:25:49 +0200 Subject: USB: serial: ftdi_sio: drop unnecessary urb_ variable prefixes Drop urb_ prefixes from value and index variables used in control requests. Reviewed-by: Greg Kroah-Hartman Signed-off-by: Johan Hovold --- drivers/usb/serial/ftdi_sio.c | 83 +++++++++++++++++++++---------------------- 1 file changed, 41 insertions(+), 42 deletions(-) (limited to 'drivers/usb') diff --git a/drivers/usb/serial/ftdi_sio.c b/drivers/usb/serial/ftdi_sio.c index 0d24da0..3d7f181 100644 --- a/drivers/usb/serial/ftdi_sio.c +++ b/drivers/usb/serial/ftdi_sio.c @@ -54,10 +54,9 @@ struct ftdi_private { int custom_divisor; /* custom_divisor kludge, this is for baud_base (different from what goes to the chip!) */ - u16 last_set_data_urb_value; - /* the last data state set - needed for doing - * a break - */ + u16 last_set_data_value; /* the last data state set - needed for doing + * a break + */ int flags; /* some ASYNC_xxxx flags are supported */ unsigned long last_dtr_rts; /* saved modem control outputs */ char prev_status; /* Used for TIOCMIWAIT */ @@ -1195,7 +1194,7 @@ static int update_mctrl(struct usb_serial_port *port, unsigned int set, { struct ftdi_private *priv = usb_get_serial_port_data(port); struct device *dev = &port->dev; - unsigned urb_value; + unsigned value; int rv; if (((set | clear) & (TIOCM_DTR | TIOCM_RTS)) == 0) { @@ -1204,20 +1203,20 @@ static int update_mctrl(struct usb_serial_port *port, unsigned int set, } clear &= ~set; /* 'set' takes precedence over 'clear' */ - urb_value = 0; + value = 0; if (clear & TIOCM_DTR) - urb_value |= FTDI_SIO_SET_DTR_LOW; + value |= FTDI_SIO_SET_DTR_LOW; if (clear & TIOCM_RTS) - urb_value |= FTDI_SIO_SET_RTS_LOW; + value |= FTDI_SIO_SET_RTS_LOW; if (set & TIOCM_DTR) - urb_value |= FTDI_SIO_SET_DTR_HIGH; + value |= FTDI_SIO_SET_DTR_HIGH; if (set & TIOCM_RTS) - urb_value |= FTDI_SIO_SET_RTS_HIGH; + value |= FTDI_SIO_SET_RTS_HIGH; rv = usb_control_msg(port->serial->dev, usb_sndctrlpipe(port->serial->dev, 0), FTDI_SIO_SET_MODEM_CTRL_REQUEST, FTDI_SIO_SET_MODEM_CTRL_REQUEST_TYPE, - urb_value, priv->interface, + value, priv->interface, NULL, 0, WDR_TIMEOUT); if (rv < 0) { dev_dbg(dev, "%s Error from MODEM_CTRL urb: DTR %s, RTS %s\n", @@ -1346,26 +1345,26 @@ static u32 get_ftdi_divisor(struct tty_struct *tty, static int change_speed(struct tty_struct *tty, struct usb_serial_port *port) { struct ftdi_private *priv = usb_get_serial_port_data(port); - u16 urb_value; - u16 urb_index; - u32 urb_index_value; + u16 value; + u16 index; + u32 index_value; int rv; - urb_index_value = get_ftdi_divisor(tty, port); - urb_value = (u16)urb_index_value; - urb_index = (u16)(urb_index_value >> 16); + index_value = get_ftdi_divisor(tty, port); + value = (u16)index_value; + index = (u16)(index_value >> 16); if ((priv->chip_type == FT2232C) || (priv->chip_type == FT2232H) || (priv->chip_type == FT4232H) || (priv->chip_type == FT232H)) { /* Probably the BM type needs the MSB of the encoded fractional * divider also moved like for the chips above. Any infos? */ - urb_index = (u16)((urb_index << 8) | priv->interface); + index = (u16)((index << 8) | priv->interface); } rv = usb_control_msg(port->serial->dev, usb_sndctrlpipe(port->serial->dev, 0), FTDI_SIO_SET_BAUDRATE_REQUEST, FTDI_SIO_SET_BAUDRATE_REQUEST_TYPE, - urb_value, urb_index, + value, index, NULL, 0, WDR_SHORT_TIMEOUT); return rv; } @@ -2140,29 +2139,29 @@ static void ftdi_break_ctl(struct tty_struct *tty, int break_state) { struct usb_serial_port *port = tty->driver_data; struct ftdi_private *priv = usb_get_serial_port_data(port); - u16 urb_value; + u16 value; /* break_state = -1 to turn on break, and 0 to turn off break */ /* see drivers/char/tty_io.c to see it used */ - /* last_set_data_urb_value NEVER has the break bit set in it */ + /* last_set_data_value NEVER has the break bit set in it */ if (break_state) - urb_value = priv->last_set_data_urb_value | FTDI_SIO_SET_BREAK; + value = priv->last_set_data_value | FTDI_SIO_SET_BREAK; else - urb_value = priv->last_set_data_urb_value; + value = priv->last_set_data_value; if (usb_control_msg(port->serial->dev, usb_sndctrlpipe(port->serial->dev, 0), FTDI_SIO_SET_DATA_REQUEST, FTDI_SIO_SET_DATA_REQUEST_TYPE, - urb_value , priv->interface, + value , priv->interface, NULL, 0, WDR_TIMEOUT) < 0) { dev_err(&port->dev, "%s FAILED to enable/disable break state (state was %d)\n", __func__, break_state); } dev_dbg(&port->dev, "%s break state is %d - urb is %d\n", __func__, - break_state, urb_value); + break_state, value); } @@ -2192,7 +2191,7 @@ static void ftdi_set_termios(struct tty_struct *tty, struct ftdi_private *priv = usb_get_serial_port_data(port); struct ktermios *termios = &tty->termios; unsigned int cflag = termios->c_cflag; - u16 urb_value; /* will hold the new flags */ + u16 value; /* Added for xon/xoff support */ unsigned int iflag = termios->c_iflag; @@ -2258,44 +2257,44 @@ static void ftdi_set_termios(struct tty_struct *tty, no_skip: /* Set number of data bits, parity, stop bits */ - urb_value = 0; - urb_value |= (cflag & CSTOPB ? FTDI_SIO_SET_DATA_STOP_BITS_2 : - FTDI_SIO_SET_DATA_STOP_BITS_1); + value = 0; + value |= (cflag & CSTOPB ? FTDI_SIO_SET_DATA_STOP_BITS_2 : + FTDI_SIO_SET_DATA_STOP_BITS_1); if (cflag & PARENB) { if (cflag & CMSPAR) - urb_value |= cflag & PARODD ? - FTDI_SIO_SET_DATA_PARITY_MARK : - FTDI_SIO_SET_DATA_PARITY_SPACE; + value |= cflag & PARODD ? + FTDI_SIO_SET_DATA_PARITY_MARK : + FTDI_SIO_SET_DATA_PARITY_SPACE; else - urb_value |= cflag & PARODD ? - FTDI_SIO_SET_DATA_PARITY_ODD : - FTDI_SIO_SET_DATA_PARITY_EVEN; + value |= cflag & PARODD ? + FTDI_SIO_SET_DATA_PARITY_ODD : + FTDI_SIO_SET_DATA_PARITY_EVEN; } else { - urb_value |= FTDI_SIO_SET_DATA_PARITY_NONE; + value |= FTDI_SIO_SET_DATA_PARITY_NONE; } switch (cflag & CSIZE) { case CS5: dev_dbg(ddev, "Setting CS5 quirk\n"); break; case CS7: - urb_value |= 7; + value |= 7; dev_dbg(ddev, "Setting CS7\n"); break; default: case CS8: - urb_value |= 8; + value |= 8; dev_dbg(ddev, "Setting CS8\n"); break; } /* This is needed by the break command since it uses the same command - but is or'ed with this value */ - priv->last_set_data_urb_value = urb_value; + priv->last_set_data_value = value; if (usb_control_msg(dev, usb_sndctrlpipe(dev, 0), FTDI_SIO_SET_DATA_REQUEST, FTDI_SIO_SET_DATA_REQUEST_TYPE, - urb_value , priv->interface, + value , priv->interface, NULL, 0, WDR_SHORT_TIMEOUT) < 0) { dev_err(ddev, "%s FAILED to set databits/stopbits/parity\n", __func__); @@ -2354,13 +2353,13 @@ no_c_cflag_changes: */ vstart = termios->c_cc[VSTART]; vstop = termios->c_cc[VSTOP]; - urb_value = (vstop << 8) | (vstart); + value = (vstop << 8) | (vstart); if (usb_control_msg(dev, usb_sndctrlpipe(dev, 0), FTDI_SIO_SET_FLOW_CTRL_REQUEST, FTDI_SIO_SET_FLOW_CTRL_REQUEST_TYPE, - urb_value , (FTDI_SIO_XON_XOFF_HS + value , (FTDI_SIO_XON_XOFF_HS | priv->interface), NULL, 0, WDR_TIMEOUT) < 0) { dev_err(&port->dev, "urb failed to set to " -- cgit v1.1 From df1cd63d6d112e4a1402166dacc411ccca9b09ac Mon Sep 17 00:00:00 2001 From: Johan Hovold Date: Fri, 18 May 2018 15:25:50 +0200 Subject: USB: serial: ftdi_sio: clean up flow control management Clean up the somewhat convoluted hardware-assisted flow control handling. Reviewed-by: Greg Kroah-Hartman Signed-off-by: Johan Hovold --- drivers/usb/serial/ftdi_sio.c | 81 ++++++++++++------------------------------- 1 file changed, 23 insertions(+), 58 deletions(-) (limited to 'drivers/usb') diff --git a/drivers/usb/serial/ftdi_sio.c b/drivers/usb/serial/ftdi_sio.c index 3d7f181..b5cef32 100644 --- a/drivers/usb/serial/ftdi_sio.c +++ b/drivers/usb/serial/ftdi_sio.c @@ -2191,12 +2191,8 @@ static void ftdi_set_termios(struct tty_struct *tty, struct ftdi_private *priv = usb_get_serial_port_data(port); struct ktermios *termios = &tty->termios; unsigned int cflag = termios->c_cflag; - u16 value; - - /* Added for xon/xoff support */ - unsigned int iflag = termios->c_iflag; - unsigned char vstop; - unsigned char vstart; + u16 value, index; + int ret; /* Force baud rate if this device requires it, unless it is set to B0. */ @@ -2325,61 +2321,30 @@ no_data_parity_stop_changes: set_mctrl(port, TIOCM_DTR | TIOCM_RTS); } - /* Set flow control */ - /* Note device also supports DTR/CD (ugh) and Xon/Xoff in hardware */ no_c_cflag_changes: - if (cflag & CRTSCTS) { - dev_dbg(ddev, "%s Setting to CRTSCTS flow control\n", __func__); - if (usb_control_msg(dev, - usb_sndctrlpipe(dev, 0), - FTDI_SIO_SET_FLOW_CTRL_REQUEST, - FTDI_SIO_SET_FLOW_CTRL_REQUEST_TYPE, - 0 , (FTDI_SIO_RTS_CTS_HS | priv->interface), - NULL, 0, WDR_TIMEOUT) < 0) { - dev_err(ddev, "urb failed to set to rts/cts flow control\n"); - } + /* Set hardware-assisted flow control */ + value = 0; + + if (C_CRTSCTS(tty)) { + dev_dbg(&port->dev, "enabling rts/cts flow control\n"); + index = FTDI_SIO_RTS_CTS_HS; + } else if (I_IXON(tty)) { + dev_dbg(&port->dev, "enabling xon/xoff flow control\n"); + index = FTDI_SIO_XON_XOFF_HS; + value = STOP_CHAR(tty) << 8 | START_CHAR(tty); } else { - /* - * Xon/Xoff code - */ - if (iflag & IXON) { - dev_dbg(ddev, "%s request to enable xonxoff iflag=%04x\n", - __func__, iflag); - /* Try to enable the XON/XOFF on the ftdi_sio - * Set the vstart and vstop -- could have been done up - * above where a lot of other dereferencing is done but - * that would be very inefficient as vstart and vstop - * are not always needed. - */ - vstart = termios->c_cc[VSTART]; - vstop = termios->c_cc[VSTOP]; - value = (vstop << 8) | (vstart); - - if (usb_control_msg(dev, - usb_sndctrlpipe(dev, 0), - FTDI_SIO_SET_FLOW_CTRL_REQUEST, - FTDI_SIO_SET_FLOW_CTRL_REQUEST_TYPE, - value , (FTDI_SIO_XON_XOFF_HS - | priv->interface), - NULL, 0, WDR_TIMEOUT) < 0) { - dev_err(&port->dev, "urb failed to set to " - "xon/xoff flow control\n"); - } - } else { - /* else clause to only run if cflag ! CRTSCTS and iflag - * ! XON. CHECKME Assuming XON/XOFF handled by tty - * stack - not by device */ - dev_dbg(ddev, "%s Turning off hardware flow control\n", __func__); - if (usb_control_msg(dev, - usb_sndctrlpipe(dev, 0), - FTDI_SIO_SET_FLOW_CTRL_REQUEST, - FTDI_SIO_SET_FLOW_CTRL_REQUEST_TYPE, - 0, priv->interface, - NULL, 0, WDR_TIMEOUT) < 0) { - dev_err(ddev, "urb failed to clear flow control\n"); - } - } + dev_dbg(&port->dev, "disabling flow control\n"); + index = FTDI_SIO_DISABLE_FLOW_CTRL; } + + index |= priv->interface; + + ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), + FTDI_SIO_SET_FLOW_CTRL_REQUEST, + FTDI_SIO_SET_FLOW_CTRL_REQUEST_TYPE, + value, index, NULL, 0, WDR_TIMEOUT); + if (ret < 0) + dev_err(&port->dev, "failed to set flow control: %d\n", ret); } /* -- cgit v1.1 From 7041d9c3f01b365daa50340a5d2dce84a09ea813 Mon Sep 17 00:00:00 2001 From: Florian Zumbiehl Date: Sun, 20 May 2018 02:23:12 +0200 Subject: USB: serial: pl2303: add support for tx xon/xoff flow control Support hardware-level Xon/Xoff flow control in transmit direction with pl2303. I only know how to get the hardware to do IXON/!IXANY with ^S/^Q as control characters, so I preserve the old behaviour for all other cases. Signed-off-by: Florian Zumbiehl [ johan: rewrite logic using pl2303_termios_change() helper ] Signed-off-by: Johan Hovold --- drivers/usb/serial/pl2303.c | 16 +++++++++++++++- 1 file changed, 15 insertions(+), 1 deletion(-) (limited to 'drivers/usb') diff --git a/drivers/usb/serial/pl2303.c b/drivers/usb/serial/pl2303.c index 46dd09d..5d1a193 100644 --- a/drivers/usb/serial/pl2303.c +++ b/drivers/usb/serial/pl2303.c @@ -533,6 +533,17 @@ static int pl2303_set_line_request(struct usb_serial_port *port, return 0; } +static bool pl2303_termios_change(const struct ktermios *a, const struct ktermios *b) +{ + bool ixon_change; + + ixon_change = ((a->c_iflag ^ b->c_iflag) & (IXON | IXANY)) || + a->c_cc[VSTART] != b->c_cc[VSTART] || + a->c_cc[VSTOP] != b->c_cc[VSTOP]; + + return tty_termios_hw_change(a, b) || ixon_change; +} + static void pl2303_set_termios(struct tty_struct *tty, struct usb_serial_port *port, struct ktermios *old_termios) { @@ -544,7 +555,7 @@ static void pl2303_set_termios(struct tty_struct *tty, int ret; u8 control; - if (old_termios && !tty_termios_hw_change(&tty->termios, old_termios)) + if (old_termios && !pl2303_termios_change(&tty->termios, old_termios)) return; buf = kzalloc(7, GFP_KERNEL); @@ -662,6 +673,9 @@ static void pl2303_set_termios(struct tty_struct *tty, pl2303_vendor_write(serial, 0x0, 0x41); else pl2303_vendor_write(serial, 0x0, 0x61); + } else if (I_IXON(tty) && !I_IXANY(tty) && START_CHAR(tty) == 0x11 && + STOP_CHAR(tty) == 0x13) { + pl2303_vendor_write(serial, 0x0, 0xc0); } else { pl2303_vendor_write(serial, 0x0, 0x0); } -- cgit v1.1 From 78fba982db768fd2cd3f05b03ea2b2b13af1cfbb Mon Sep 17 00:00:00 2001 From: Bin Liu Date: Mon, 21 May 2018 08:42:09 -0500 Subject: usb: musb: merge musbhsdma.h into musbhsdma.c Now Blackfin support is removed, header musbhsdma.h is only included in musbhsdma.c. So let's merge the content in musbhsdma.h to musbhsdma.c and delete musbhsdma.h. Signed-off-by: Bin Liu Signed-off-by: Greg Kroah-Hartman --- drivers/usb/musb/musbhsdma.c | 66 +++++++++++++++++++++++++++++++++++++++- drivers/usb/musb/musbhsdma.h | 72 -------------------------------------------- 2 files changed, 65 insertions(+), 73 deletions(-) delete mode 100644 drivers/usb/musb/musbhsdma.h (limited to 'drivers/usb') diff --git a/drivers/usb/musb/musbhsdma.c b/drivers/usb/musb/musbhsdma.c index 4389fc3..57d416a 100644 --- a/drivers/usb/musb/musbhsdma.c +++ b/drivers/usb/musb/musbhsdma.c @@ -10,7 +10,71 @@ #include #include #include "musb_core.h" -#include "musbhsdma.h" + +#define MUSB_HSDMA_BASE 0x200 +#define MUSB_HSDMA_INTR (MUSB_HSDMA_BASE + 0) +#define MUSB_HSDMA_CONTROL 0x4 +#define MUSB_HSDMA_ADDRESS 0x8 +#define MUSB_HSDMA_COUNT 0xc + +#define MUSB_HSDMA_CHANNEL_OFFSET(_bchannel, _offset) \ + (MUSB_HSDMA_BASE + (_bchannel << 4) + _offset) + +#define musb_read_hsdma_addr(mbase, bchannel) \ + musb_readl(mbase, \ + MUSB_HSDMA_CHANNEL_OFFSET(bchannel, MUSB_HSDMA_ADDRESS)) + +#define musb_write_hsdma_addr(mbase, bchannel, addr) \ + musb_writel(mbase, \ + MUSB_HSDMA_CHANNEL_OFFSET(bchannel, MUSB_HSDMA_ADDRESS), \ + addr) + +#define musb_read_hsdma_count(mbase, bchannel) \ + musb_readl(mbase, \ + MUSB_HSDMA_CHANNEL_OFFSET(bchannel, MUSB_HSDMA_COUNT)) + +#define musb_write_hsdma_count(mbase, bchannel, len) \ + musb_writel(mbase, \ + MUSB_HSDMA_CHANNEL_OFFSET(bchannel, MUSB_HSDMA_COUNT), \ + len) +/* control register (16-bit): */ +#define MUSB_HSDMA_ENABLE_SHIFT 0 +#define MUSB_HSDMA_TRANSMIT_SHIFT 1 +#define MUSB_HSDMA_MODE1_SHIFT 2 +#define MUSB_HSDMA_IRQENABLE_SHIFT 3 +#define MUSB_HSDMA_ENDPOINT_SHIFT 4 +#define MUSB_HSDMA_BUSERROR_SHIFT 8 +#define MUSB_HSDMA_BURSTMODE_SHIFT 9 +#define MUSB_HSDMA_BURSTMODE (3 << MUSB_HSDMA_BURSTMODE_SHIFT) +#define MUSB_HSDMA_BURSTMODE_UNSPEC 0 +#define MUSB_HSDMA_BURSTMODE_INCR4 1 +#define MUSB_HSDMA_BURSTMODE_INCR8 2 +#define MUSB_HSDMA_BURSTMODE_INCR16 3 + +#define MUSB_HSDMA_CHANNELS 8 + +struct musb_dma_controller; + +struct musb_dma_channel { + struct dma_channel channel; + struct musb_dma_controller *controller; + u32 start_addr; + u32 len; + u16 max_packet_sz; + u8 idx; + u8 epnum; + u8 transmit; +}; + +struct musb_dma_controller { + struct dma_controller controller; + struct musb_dma_channel channel[MUSB_HSDMA_CHANNELS]; + void *private_data; + void __iomem *base; + u8 channel_count; + u8 used_channels; + int irq; +}; static void dma_channel_release(struct dma_channel *channel); diff --git a/drivers/usb/musb/musbhsdma.h b/drivers/usb/musb/musbhsdma.h deleted file mode 100644 index 9366513..0000000 --- a/drivers/usb/musb/musbhsdma.h +++ /dev/null @@ -1,72 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 -/* - * MUSB OTG driver - support for Mentor's DMA controller - * - * Copyright 2005 Mentor Graphics Corporation - * Copyright (C) 2005-2007 by Texas Instruments - */ - -#define MUSB_HSDMA_BASE 0x200 -#define MUSB_HSDMA_INTR (MUSB_HSDMA_BASE + 0) -#define MUSB_HSDMA_CONTROL 0x4 -#define MUSB_HSDMA_ADDRESS 0x8 -#define MUSB_HSDMA_COUNT 0xc - -#define MUSB_HSDMA_CHANNEL_OFFSET(_bchannel, _offset) \ - (MUSB_HSDMA_BASE + (_bchannel << 4) + _offset) - -#define musb_read_hsdma_addr(mbase, bchannel) \ - musb_readl(mbase, \ - MUSB_HSDMA_CHANNEL_OFFSET(bchannel, MUSB_HSDMA_ADDRESS)) - -#define musb_write_hsdma_addr(mbase, bchannel, addr) \ - musb_writel(mbase, \ - MUSB_HSDMA_CHANNEL_OFFSET(bchannel, MUSB_HSDMA_ADDRESS), \ - addr) - -#define musb_read_hsdma_count(mbase, bchannel) \ - musb_readl(mbase, \ - MUSB_HSDMA_CHANNEL_OFFSET(bchannel, MUSB_HSDMA_COUNT)) - -#define musb_write_hsdma_count(mbase, bchannel, len) \ - musb_writel(mbase, \ - MUSB_HSDMA_CHANNEL_OFFSET(bchannel, MUSB_HSDMA_COUNT), \ - len) -/* control register (16-bit): */ -#define MUSB_HSDMA_ENABLE_SHIFT 0 -#define MUSB_HSDMA_TRANSMIT_SHIFT 1 -#define MUSB_HSDMA_MODE1_SHIFT 2 -#define MUSB_HSDMA_IRQENABLE_SHIFT 3 -#define MUSB_HSDMA_ENDPOINT_SHIFT 4 -#define MUSB_HSDMA_BUSERROR_SHIFT 8 -#define MUSB_HSDMA_BURSTMODE_SHIFT 9 -#define MUSB_HSDMA_BURSTMODE (3 << MUSB_HSDMA_BURSTMODE_SHIFT) -#define MUSB_HSDMA_BURSTMODE_UNSPEC 0 -#define MUSB_HSDMA_BURSTMODE_INCR4 1 -#define MUSB_HSDMA_BURSTMODE_INCR8 2 -#define MUSB_HSDMA_BURSTMODE_INCR16 3 - -#define MUSB_HSDMA_CHANNELS 8 - -struct musb_dma_controller; - -struct musb_dma_channel { - struct dma_channel channel; - struct musb_dma_controller *controller; - u32 start_addr; - u32 len; - u16 max_packet_sz; - u8 idx; - u8 epnum; - u8 transmit; -}; - -struct musb_dma_controller { - struct dma_controller controller; - struct musb_dma_channel channel[MUSB_HSDMA_CHANNELS]; - void *private_data; - void __iomem *base; - u8 channel_count; - u8 used_channels; - int irq; -}; -- cgit v1.1 From 42e990ea80f23c58404f24c009da3ae3867a1fec Mon Sep 17 00:00:00 2001 From: Bin Liu Date: Mon, 21 May 2018 08:42:10 -0500 Subject: usb: musb: remove readl/writel from struct musb_platform_ops Now Blackfin support is removed, we no longer need function pointers for musb_readl() and musb_writel(). Signed-off-by: Bin Liu Signed-off-by: Greg Kroah-Hartman --- drivers/usb/musb/musb_core.c | 34 ++++++++++++---------------------- drivers/usb/musb/musb_core.h | 4 ---- drivers/usb/musb/musb_io.h | 4 ++-- 3 files changed, 14 insertions(+), 28 deletions(-) (limited to 'drivers/usb') diff --git a/drivers/usb/musb/musb_core.c b/drivers/usb/musb/musb_core.c index fb5e452..4ff6da1 100644 --- a/drivers/usb/musb/musb_core.c +++ b/drivers/usb/musb/musb_core.c @@ -274,20 +274,6 @@ static void musb_default_writew(void __iomem *addr, unsigned offset, u16 data) __raw_writew(data, addr + offset); } -static u32 musb_default_readl(const void __iomem *addr, unsigned offset) -{ - u32 data = __raw_readl(addr + offset); - - trace_musb_readl(__builtin_return_address(0), addr, offset, data); - return data; -} - -static void musb_default_writel(void __iomem *addr, unsigned offset, u32 data) -{ - trace_musb_writel(__builtin_return_address(0), addr, offset, data); - __raw_writel(data, addr + offset); -} - /* * Load an endpoint's FIFO */ @@ -390,10 +376,20 @@ EXPORT_SYMBOL_GPL(musb_readw); void (*musb_writew)(void __iomem *addr, unsigned offset, u16 data); EXPORT_SYMBOL_GPL(musb_writew); -u32 (*musb_readl)(const void __iomem *addr, unsigned offset); +u32 musb_readl(const void __iomem *addr, unsigned offset) +{ + u32 data = __raw_readl(addr + offset); + + trace_musb_readl(__builtin_return_address(0), addr, offset, data); + return data; +} EXPORT_SYMBOL_GPL(musb_readl); -void (*musb_writel)(void __iomem *addr, unsigned offset, u32 data); +void musb_writel(void __iomem *addr, unsigned offset, u32 data) +{ + trace_musb_writel(__builtin_return_address(0), addr, offset, data); + __raw_writel(data, addr + offset); +} EXPORT_SYMBOL_GPL(musb_writel); #ifndef CONFIG_MUSB_PIO_ONLY @@ -2158,8 +2154,6 @@ musb_init_controller(struct device *dev, int nIrq, void __iomem *ctrl) musb_writeb = musb_default_writeb; musb_readw = musb_default_readw; musb_writew = musb_default_writew; - musb_readl = musb_default_readl; - musb_writel = musb_default_writel; /* The musb_platform_init() call: * - adjusts musb->mregs @@ -2226,10 +2220,6 @@ musb_init_controller(struct device *dev, int nIrq, void __iomem *ctrl) musb_readw = musb->ops->readw; if (musb->ops->writew) musb_writew = musb->ops->writew; - if (musb->ops->readl) - musb_readl = musb->ops->readl; - if (musb->ops->writel) - musb_writel = musb->ops->writel; #ifndef CONFIG_MUSB_PIO_ONLY if (!musb->ops->dma_init || !musb->ops->dma_exit) { diff --git a/drivers/usb/musb/musb_core.h b/drivers/usb/musb/musb_core.h index 8a74cb2..a4bf1e9 100644 --- a/drivers/usb/musb/musb_core.h +++ b/drivers/usb/musb/musb_core.h @@ -127,8 +127,6 @@ struct musb_io; * @writeb: write 8 bits * @readw: read 16 bits * @writew: write 16 bits - * @readl: read 32 bits - * @writel: write 32 bits * @read_fifo: reads the fifo * @write_fifo: writes to fifo * @dma_init: platform specific dma init function @@ -174,8 +172,6 @@ struct musb_platform_ops { void (*writeb)(void __iomem *addr, unsigned offset, u8 data); u16 (*readw)(const void __iomem *addr, unsigned offset); void (*writew)(void __iomem *addr, unsigned offset, u16 data); - u32 (*readl)(const void __iomem *addr, unsigned offset); - void (*writel)(void __iomem *addr, unsigned offset, u32 data); void (*read_fifo)(struct musb_hw_ep *hw_ep, u16 len, u8 *buf); void (*write_fifo)(struct musb_hw_ep *hw_ep, u16 len, const u8 *buf); struct dma_controller * diff --git a/drivers/usb/musb/musb_io.h b/drivers/usb/musb/musb_io.h index b7025b2..b4d870b 100644 --- a/drivers/usb/musb/musb_io.h +++ b/drivers/usb/musb/musb_io.h @@ -39,7 +39,7 @@ extern u8 (*musb_readb)(const void __iomem *addr, unsigned offset); extern void (*musb_writeb)(void __iomem *addr, unsigned offset, u8 data); extern u16 (*musb_readw)(const void __iomem *addr, unsigned offset); extern void (*musb_writew)(void __iomem *addr, unsigned offset, u16 data); -extern u32 (*musb_readl)(const void __iomem *addr, unsigned offset); -extern void (*musb_writel)(void __iomem *addr, unsigned offset, u32 data); +extern u32 musb_readl(const void __iomem *addr, unsigned offset); +extern void musb_writel(void __iomem *addr, unsigned offset, u32 data); #endif -- cgit v1.1 From 53e1657a1c94b96a63b8d443c3aeec0c650621e3 Mon Sep 17 00:00:00 2001 From: Bin Liu Date: Mon, 21 May 2018 08:42:11 -0500 Subject: usb: musb: remove adjust_channel_params() callback from musb_platform_ops Now Blackfin support is removed, nobody uses adjust_channel_params() any more, so remove it from struct musb_platform_ops. Signed-off-by: Bin Liu Signed-off-by: Greg Kroah-Hartman --- drivers/usb/musb/musb_core.h | 4 ---- drivers/usb/musb/musbhsdma.c | 8 -------- 2 files changed, 12 deletions(-) (limited to 'drivers/usb') diff --git a/drivers/usb/musb/musb_core.h b/drivers/usb/musb/musb_core.h index a4bf1e9..f57323e 100644 --- a/drivers/usb/musb/musb_core.h +++ b/drivers/usb/musb/musb_core.h @@ -138,7 +138,6 @@ struct musb_io; * @recover: platform-specific babble recovery * @vbus_status: returns vbus status if possible * @set_vbus: forces vbus status - * @adjust_channel_params: pre check for standard dma channel_program func * @pre_root_reset_end: called before the root usb port reset flag gets cleared * @post_root_reset_end: called after the root usb port reset flag gets cleared * @phy_callback: optional callback function for the phy to call @@ -184,9 +183,6 @@ struct musb_platform_ops { int (*vbus_status)(struct musb *musb); void (*set_vbus)(struct musb *musb, int on); - int (*adjust_channel_params)(struct dma_channel *channel, - u16 packet_sz, u8 *mode, - dma_addr_t *dma_addr, u32 *len); void (*pre_root_reset_end)(struct musb *musb); void (*post_root_reset_end)(struct musb *musb); int (*phy_callback)(enum musb_vbus_id_status status); diff --git a/drivers/usb/musb/musbhsdma.c b/drivers/usb/musb/musbhsdma.c index 57d416a..a688f7f 100644 --- a/drivers/usb/musb/musbhsdma.c +++ b/drivers/usb/musb/musbhsdma.c @@ -199,14 +199,6 @@ static int dma_channel_program(struct dma_channel *channel, BUG_ON(channel->status == MUSB_DMA_STATUS_UNKNOWN || channel->status == MUSB_DMA_STATUS_BUSY); - /* Let targets check/tweak the arguments */ - if (musb->ops->adjust_channel_params) { - int ret = musb->ops->adjust_channel_params(channel, - packet_sz, &mode, &dma_addr, &len); - if (ret) - return ret; - } - /* * The DMA engine in RTL1.8 and above cannot handle * DMA addresses that are not aligned to a 4 byte boundary. -- cgit v1.1 From 113ad151cf03ca4fe74a91c5acb8191aba630d04 Mon Sep 17 00:00:00 2001 From: Bin Liu Date: Mon, 21 May 2018 08:42:12 -0500 Subject: usb: musb: remove some register access wrapper functions The following wrappers were defined because of Blackfin support. Now Blackfin support is removed, these wrappers are no longer needed, so remove them. musb_write_txfifosz musb_write_txfifoadd musb_write_rxfifosz musb_write_rxfifoadd musb_write_ulpi_buscontrol musb_read_txfifosz musb_read_txfifoadd musb_read_rxfifosz musb_read_rxfifoadd musb_read_ulpi_buscontrol musb_read_hwvers Signed-off-by: Bin Liu Signed-off-by: Greg Kroah-Hartman --- drivers/usb/musb/musb_core.c | 42 ++++++++++++++++----------------- drivers/usb/musb/musb_regs.h | 55 -------------------------------------------- 2 files changed, 21 insertions(+), 76 deletions(-) (limited to 'drivers/usb') diff --git a/drivers/usb/musb/musb_core.c b/drivers/usb/musb/musb_core.c index 4ff6da1..d3f9f7e 100644 --- a/drivers/usb/musb/musb_core.c +++ b/drivers/usb/musb/musb_core.c @@ -1240,25 +1240,25 @@ fifo_setup(struct musb *musb, struct musb_hw_ep *hw_ep, /* REVISIT error check: be sure ep0 can both rx and tx ... */ switch (cfg->style) { case FIFO_TX: - musb_write_txfifosz(mbase, c_size); - musb_write_txfifoadd(mbase, c_off); + musb_writeb(mbase, MUSB_TXFIFOSZ, c_size); + musb_writew(mbase, MUSB_TXFIFOADD, c_off); hw_ep->tx_double_buffered = !!(c_size & MUSB_FIFOSZ_DPB); hw_ep->max_packet_sz_tx = maxpacket; break; case FIFO_RX: - musb_write_rxfifosz(mbase, c_size); - musb_write_rxfifoadd(mbase, c_off); + musb_writeb(mbase, MUSB_RXFIFOSZ, c_size); + musb_writew(mbase, MUSB_RXFIFOADD, c_off); hw_ep->rx_double_buffered = !!(c_size & MUSB_FIFOSZ_DPB); hw_ep->max_packet_sz_rx = maxpacket; break; case FIFO_RXTX: - musb_write_txfifosz(mbase, c_size); - musb_write_txfifoadd(mbase, c_off); + musb_writeb(mbase, MUSB_TXFIFOSZ, c_size); + musb_writew(mbase, MUSB_TXFIFOADD, c_off); hw_ep->rx_double_buffered = !!(c_size & MUSB_FIFOSZ_DPB); hw_ep->max_packet_sz_rx = maxpacket; - musb_write_rxfifosz(mbase, c_size); - musb_write_rxfifoadd(mbase, c_off); + musb_writeb(mbase, MUSB_RXFIFOSZ, c_size); + musb_writew(mbase, MUSB_RXFIFOADD, c_off); hw_ep->tx_double_buffered = hw_ep->rx_double_buffered; hw_ep->max_packet_sz_tx = maxpacket; @@ -1466,7 +1466,7 @@ static int musb_core_init(u16 musb_type, struct musb *musb) } /* log release info */ - musb->hwvers = musb_read_hwvers(mbase); + musb->hwvers = musb_readw(mbase, MUSB_HWVERS); pr_debug("%s: %sHDRC RTL version %d.%d%s\n", musb_driver_name, type, MUSB_HWVERS_MAJOR(musb->hwvers), MUSB_HWVERS_MINOR(musb->hwvers), @@ -2311,9 +2311,9 @@ musb_init_controller(struct device *dev, int nIrq, void __iomem *ctrl) /* program PHY to use external vBus if required */ if (plat->extvbus) { - u8 busctl = musb_read_ulpi_buscontrol(musb->mregs); + u8 busctl = musb_readb(musb->mregs, MUSB_ULPI_BUSCONTROL); busctl |= MUSB_ULPI_USE_EXTVBUS; - musb_write_ulpi_buscontrol(musb->mregs, busctl); + musb_writeb(musb->mregs, MUSB_ULPI_BUSCONTROL, busctl); } if (musb->xceiv->otg->default_a) { @@ -2482,7 +2482,7 @@ static void musb_save_context(struct musb *musb) musb->context.frame = musb_readw(musb_base, MUSB_FRAME); musb->context.testmode = musb_readb(musb_base, MUSB_TESTMODE); - musb->context.busctl = musb_read_ulpi_buscontrol(musb->mregs); + musb->context.busctl = musb_readb(musb_base, MUSB_ULPI_BUSCONTROL); musb->context.power = musb_readb(musb_base, MUSB_POWER); musb->context.intrusbe = musb_readb(musb_base, MUSB_INTRUSBE); musb->context.index = musb_readb(musb_base, MUSB_INDEX); @@ -2511,13 +2511,13 @@ static void musb_save_context(struct musb *musb) if (musb->dyn_fifo) { musb->context.index_regs[i].txfifoadd = - musb_read_txfifoadd(musb_base); + musb_readw(musb_base, MUSB_TXFIFOADD); musb->context.index_regs[i].rxfifoadd = - musb_read_rxfifoadd(musb_base); + musb_readw(musb_base, MUSB_RXFIFOADD); musb->context.index_regs[i].txfifosz = - musb_read_txfifosz(musb_base); + musb_readb(musb_base, MUSB_TXFIFOSZ); musb->context.index_regs[i].rxfifosz = - musb_read_rxfifosz(musb_base); + musb_readb(musb_base, MUSB_RXFIFOSZ); } musb->context.index_regs[i].txtype = @@ -2554,7 +2554,7 @@ static void musb_restore_context(struct musb *musb) musb_writew(musb_base, MUSB_FRAME, musb->context.frame); musb_writeb(musb_base, MUSB_TESTMODE, musb->context.testmode); - musb_write_ulpi_buscontrol(musb->mregs, musb->context.busctl); + musb_writeb(musb_base, MUSB_ULPI_BUSCONTROL, musb->context.busctl); /* Don't affect SUSPENDM/RESUME bits in POWER reg */ power = musb_readb(musb_base, MUSB_POWER); @@ -2591,13 +2591,13 @@ static void musb_restore_context(struct musb *musb) musb->context.index_regs[i].rxcsr); if (musb->dyn_fifo) { - musb_write_txfifosz(musb_base, + musb_writeb(musb_base, MUSB_TXFIFOSZ, musb->context.index_regs[i].txfifosz); - musb_write_rxfifosz(musb_base, + musb_writeb(musb_base, MUSB_RXFIFOSZ, musb->context.index_regs[i].rxfifosz); - musb_write_txfifoadd(musb_base, + musb_writew(musb_base, MUSB_TXFIFOADD, musb->context.index_regs[i].txfifoadd); - musb_write_rxfifoadd(musb_base, + musb_writew(musb_base, MUSB_RXFIFOADD, musb->context.index_regs[i].rxfifoadd); } diff --git a/drivers/usb/musb/musb_regs.h b/drivers/usb/musb/musb_regs.h index 8846662..5cd7264 100644 --- a/drivers/usb/musb/musb_regs.h +++ b/drivers/usb/musb/musb_regs.h @@ -273,67 +273,12 @@ #define MUSB_RXHUBADDR 0x06 #define MUSB_RXHUBPORT 0x07 -static inline void musb_write_txfifosz(void __iomem *mbase, u8 c_size) -{ - musb_writeb(mbase, MUSB_TXFIFOSZ, c_size); -} - -static inline void musb_write_txfifoadd(void __iomem *mbase, u16 c_off) -{ - musb_writew(mbase, MUSB_TXFIFOADD, c_off); -} - -static inline void musb_write_rxfifosz(void __iomem *mbase, u8 c_size) -{ - musb_writeb(mbase, MUSB_RXFIFOSZ, c_size); -} - -static inline void musb_write_rxfifoadd(void __iomem *mbase, u16 c_off) -{ - musb_writew(mbase, MUSB_RXFIFOADD, c_off); -} - -static inline void musb_write_ulpi_buscontrol(void __iomem *mbase, u8 val) -{ - musb_writeb(mbase, MUSB_ULPI_BUSCONTROL, val); -} - -static inline u8 musb_read_txfifosz(void __iomem *mbase) -{ - return musb_readb(mbase, MUSB_TXFIFOSZ); -} - -static inline u16 musb_read_txfifoadd(void __iomem *mbase) -{ - return musb_readw(mbase, MUSB_TXFIFOADD); -} - -static inline u8 musb_read_rxfifosz(void __iomem *mbase) -{ - return musb_readb(mbase, MUSB_RXFIFOSZ); -} - -static inline u16 musb_read_rxfifoadd(void __iomem *mbase) -{ - return musb_readw(mbase, MUSB_RXFIFOADD); -} - -static inline u8 musb_read_ulpi_buscontrol(void __iomem *mbase) -{ - return musb_readb(mbase, MUSB_ULPI_BUSCONTROL); -} - static inline u8 musb_read_configdata(void __iomem *mbase) { musb_writeb(mbase, MUSB_INDEX, 0); return musb_readb(mbase, 0x10 + MUSB_CONFIGDATA); } -static inline u16 musb_read_hwvers(void __iomem *mbase) -{ - return musb_readw(mbase, MUSB_HWVERS); -} - static inline void musb_write_rxfunaddr(struct musb *musb, u8 epnum, u8 qh_addr_reg) { -- cgit v1.1 From dc8fca6c68c0b1262c62435490ee7a0a70d23e2a Mon Sep 17 00:00:00 2001 From: Bin Liu Date: Mon, 21 May 2018 08:42:13 -0500 Subject: usb: musb: remove duplicated quirks flag Both musb_io and musb_platform_ops in struct musb define a quirks flag for the same purpose. Let's remove the one in struct musb_io, and use that in struct musb_platform_ops instead. Signed-off-by: Bin Liu Signed-off-by: Greg Kroah-Hartman --- drivers/usb/musb/musb_core.c | 10 ++++------ drivers/usb/musb/musb_cppi41.c | 4 ++-- drivers/usb/musb/musb_dma.h | 10 +++++----- drivers/usb/musb/musb_io.h | 2 -- 4 files changed, 11 insertions(+), 15 deletions(-) (limited to 'drivers/usb') diff --git a/drivers/usb/musb/musb_core.c b/drivers/usb/musb/musb_core.c index d3f9f7e..84f25a2 100644 --- a/drivers/usb/musb/musb_core.c +++ b/drivers/usb/musb/musb_core.c @@ -1493,7 +1493,7 @@ static int musb_core_init(u16 musb_type, struct musb *musb) hw_ep->fifo = musb->io.fifo_offset(i) + mbase; #if IS_ENABLED(CONFIG_USB_MUSB_TUSB6010) - if (musb->io.quirks & MUSB_IN_TUSB) { + if (musb->ops->quirks & MUSB_IN_TUSB) { hw_ep->fifo_async = musb->async + 0x400 + musb->io.fifo_offset(i); hw_ep->fifo_sync = musb->sync + 0x400 + @@ -2176,11 +2176,9 @@ musb_init_controller(struct device *dev, int nIrq, void __iomem *ctrl) goto fail2; } - if (musb->ops->quirks) - musb->io.quirks = musb->ops->quirks; /* Most devices use indexed offset or flat offset */ - if (musb->io.quirks & MUSB_INDEXED_EP) { + if (musb->ops->quirks & MUSB_INDEXED_EP) { musb->io.ep_offset = musb_indexed_ep_offset; musb->io.ep_select = musb_indexed_ep_select; } else { @@ -2188,7 +2186,7 @@ musb_init_controller(struct device *dev, int nIrq, void __iomem *ctrl) musb->io.ep_select = musb_flat_ep_select; } - if (musb->io.quirks & MUSB_G_NO_SKB_RESERVE) + if (musb->ops->quirks & MUSB_G_NO_SKB_RESERVE) musb->g.quirk_avoids_skb_reserve = 1; /* At least tusb6010 has its own offsets */ @@ -2647,7 +2645,7 @@ static int musb_suspend(struct device *dev) ; musb->flush_irq_work = false; - if (!(musb->io.quirks & MUSB_PRESERVE_SESSION)) + if (!(musb->ops->quirks & MUSB_PRESERVE_SESSION)) musb_writeb(musb->mregs, MUSB_DEVCTL, 0); WARN_ON(!list_empty(&musb->pending_list)); diff --git a/drivers/usb/musb/musb_cppi41.c b/drivers/usb/musb/musb_cppi41.c index d0dd4f4..7fbb8a3 100644 --- a/drivers/usb/musb/musb_cppi41.c +++ b/drivers/usb/musb/musb_cppi41.c @@ -614,7 +614,7 @@ static int cppi41_dma_channel_abort(struct dma_channel *channel) } /* DA8xx Advisory 2.3.27: wait 250 ms before to start the teardown */ - if (musb->io.quirks & MUSB_DA8XX) + if (musb->ops->quirks & MUSB_DA8XX) mdelay(250); tdbit = 1 << cppi41_channel->port_num; @@ -773,7 +773,7 @@ cppi41_dma_controller_create(struct musb *musb, void __iomem *base) controller->controller.is_compatible = cppi41_is_compatible; controller->controller.musb = musb; - if (musb->io.quirks & MUSB_DA8XX) { + if (musb->ops->quirks & MUSB_DA8XX) { controller->tdown_reg = DA8XX_USB_TEARDOWN; controller->autoreq_reg = DA8XX_USB_AUTOREQ; controller->set_dma_mode = da8xx_set_dma_mode; diff --git a/drivers/usb/musb/musb_dma.h b/drivers/usb/musb/musb_dma.h index 0fc8cd0..8f60271 100644 --- a/drivers/usb/musb/musb_dma.h +++ b/drivers/usb/musb/musb_dma.h @@ -44,31 +44,31 @@ struct musb_hw_ep; #endif #ifdef CONFIG_USB_UX500_DMA -#define musb_dma_ux500(musb) (musb->io.quirks & MUSB_DMA_UX500) +#define musb_dma_ux500(musb) (musb->ops->quirks & MUSB_DMA_UX500) #else #define musb_dma_ux500(musb) 0 #endif #ifdef CONFIG_USB_TI_CPPI41_DMA -#define musb_dma_cppi41(musb) (musb->io.quirks & MUSB_DMA_CPPI41) +#define musb_dma_cppi41(musb) (musb->ops->quirks & MUSB_DMA_CPPI41) #else #define musb_dma_cppi41(musb) 0 #endif #ifdef CONFIG_USB_TI_CPPI_DMA -#define musb_dma_cppi(musb) (musb->io.quirks & MUSB_DMA_CPPI) +#define musb_dma_cppi(musb) (musb->ops->quirks & MUSB_DMA_CPPI) #else #define musb_dma_cppi(musb) 0 #endif #ifdef CONFIG_USB_TUSB_OMAP_DMA -#define tusb_dma_omap(musb) (musb->io.quirks & MUSB_DMA_TUSB_OMAP) +#define tusb_dma_omap(musb) (musb->ops->quirks & MUSB_DMA_TUSB_OMAP) #else #define tusb_dma_omap(musb) 0 #endif #ifdef CONFIG_USB_INVENTRA_DMA -#define musb_dma_inventra(musb) (musb->io.quirks & MUSB_DMA_INVENTRA) +#define musb_dma_inventra(musb) (musb->ops->quirks & MUSB_DMA_INVENTRA) #else #define musb_dma_inventra(musb) 0 #endif diff --git a/drivers/usb/musb/musb_io.h b/drivers/usb/musb/musb_io.h index b4d870b..8058a58 100644 --- a/drivers/usb/musb/musb_io.h +++ b/drivers/usb/musb/musb_io.h @@ -16,7 +16,6 @@ /** * struct musb_io - IO functions for MUSB - * @quirks: platform specific flags * @ep_offset: platform specific function to get end point offset * @ep_select: platform specific function to select end point * @fifo_offset: platform specific function to get fifo offset @@ -25,7 +24,6 @@ * @busctl_offset: platform specific function to get busctl offset */ struct musb_io { - u32 quirks; u32 (*ep_offset)(u8 epnum, u16 offset); void (*ep_select)(void __iomem *mbase, u8 epnum); u32 (*fifo_offset)(u8 epnum); -- cgit v1.1 From 55479956f37379d04f95316dd562c24970fa300b Mon Sep 17 00:00:00 2001 From: Bin Liu Date: Mon, 21 May 2018 08:42:14 -0500 Subject: usb: musb: dsps: remove duplicated get_musb_port_mode() musb_core already has musb_get_mode(), so remove the duplicate from musb_dsps.c. Signed-off-by: Bin Liu Signed-off-by: Greg Kroah-Hartman --- drivers/usb/musb/musb_dsps.c | 21 +-------------------- 1 file changed, 1 insertion(+), 20 deletions(-) (limited to 'drivers/usb') diff --git a/drivers/usb/musb/musb_dsps.c b/drivers/usb/musb/musb_dsps.c index 6a60bc0..c513ece 100644 --- a/drivers/usb/musb/musb_dsps.c +++ b/drivers/usb/musb/musb_dsps.c @@ -729,25 +729,6 @@ static int get_int_prop(struct device_node *dn, const char *s) return val; } -static int get_musb_port_mode(struct device *dev) -{ - enum usb_dr_mode mode; - - mode = usb_get_dr_mode(dev); - switch (mode) { - case USB_DR_MODE_HOST: - return MUSB_PORT_MODE_HOST; - - case USB_DR_MODE_PERIPHERAL: - return MUSB_PORT_MODE_GADGET; - - case USB_DR_MODE_UNKNOWN: - case USB_DR_MODE_OTG: - default: - return MUSB_PORT_MODE_DUAL_ROLE; - } -} - static int dsps_create_musb_pdev(struct dsps_glue *glue, struct platform_device *parent) { @@ -807,7 +788,7 @@ static int dsps_create_musb_pdev(struct dsps_glue *glue, config->num_eps = get_int_prop(dn, "mentor,num-eps"); config->ram_bits = get_int_prop(dn, "mentor,ram-bits"); config->host_port_deassert_reset_at_resume = 1; - pdata.mode = get_musb_port_mode(dev); + pdata.mode = musb_get_mode(dev); /* DT keeps this entry in mA, musb expects it as per USB spec */ pdata.power = get_int_prop(dn, "mentor,power") / 2; -- cgit v1.1 From 7ad76955c67b705550a7ba7f632b838486753d65 Mon Sep 17 00:00:00 2001 From: Bin Liu Date: Mon, 21 May 2018 08:42:15 -0500 Subject: usb: musb: remove duplicated port mode enum include/linux/usb/musb.h already defines enum for musb port mode, so remove the duplicate in musb_core.h and use the definition in musb.h. Signed-off-by: Bin Liu Signed-off-by: Greg Kroah-Hartman --- drivers/usb/musb/musb_core.c | 8 ++++---- drivers/usb/musb/musb_core.h | 8 +------- drivers/usb/musb/musb_dsps.c | 6 +++--- drivers/usb/musb/musb_gadget.c | 2 +- drivers/usb/musb/musb_host.c | 4 ++-- drivers/usb/musb/musb_virthub.c | 2 +- drivers/usb/musb/sunxi.c | 8 ++++---- 7 files changed, 16 insertions(+), 22 deletions(-) (limited to 'drivers/usb') diff --git a/drivers/usb/musb/musb_core.c b/drivers/usb/musb/musb_core.c index 84f25a2..ce54f48 100644 --- a/drivers/usb/musb/musb_core.c +++ b/drivers/usb/musb/musb_core.c @@ -1038,7 +1038,7 @@ void musb_start(struct musb *musb) * (b) vbus present/connect IRQ, peripheral mode; * (c) peripheral initiates, using SRP */ - if (musb->port_mode != MUSB_PORT_MODE_HOST && + if (musb->port_mode != MUSB_HOST && musb->xceiv->otg->state != OTG_STATE_A_WAIT_BCON && (devctl & MUSB_DEVCTL_VBUS) == MUSB_DEVCTL_VBUS) { musb->is_active = 1; @@ -2323,19 +2323,19 @@ musb_init_controller(struct device *dev, int nIrq, void __iomem *ctrl) } switch (musb->port_mode) { - case MUSB_PORT_MODE_HOST: + case MUSB_HOST: status = musb_host_setup(musb, plat->power); if (status < 0) goto fail3; status = musb_platform_set_mode(musb, MUSB_HOST); break; - case MUSB_PORT_MODE_GADGET: + case MUSB_PERIPHERAL: status = musb_gadget_setup(musb); if (status < 0) goto fail3; status = musb_platform_set_mode(musb, MUSB_PERIPHERAL); break; - case MUSB_PORT_MODE_DUAL_ROLE: + case MUSB_OTG: status = musb_host_setup(musb, plat->power); if (status < 0) goto fail3; diff --git a/drivers/usb/musb/musb_core.h b/drivers/usb/musb/musb_core.h index f57323e..04203b7 100644 --- a/drivers/usb/musb/musb_core.h +++ b/drivers/usb/musb/musb_core.h @@ -53,12 +53,6 @@ struct musb_ep; #define is_peripheral_active(m) (!(m)->is_host) #define is_host_active(m) ((m)->is_host) -enum { - MUSB_PORT_MODE_HOST = 1, - MUSB_PORT_MODE_GADGET, - MUSB_PORT_MODE_DUAL_ROLE, -}; - /****************************** CONSTANTS ********************************/ #ifndef MUSB_C_NUM_EPS @@ -351,7 +345,7 @@ struct musb { u8 min_power; /* vbus for periph, in mA/2 */ - int port_mode; /* MUSB_PORT_MODE_* */ + enum musb_mode port_mode; bool session; unsigned long quirk_retries; bool is_host; diff --git a/drivers/usb/musb/musb_dsps.c b/drivers/usb/musb/musb_dsps.c index c513ece..71aec85 100644 --- a/drivers/usb/musb/musb_dsps.c +++ b/drivers/usb/musb/musb_dsps.c @@ -183,7 +183,7 @@ static void dsps_musb_enable(struct musb *musb) musb_writel(reg_base, wrp->coreintr_set, coremask); /* start polling for ID change in dual-role idle mode */ if (musb->xceiv->otg->state == OTG_STATE_B_IDLE && - musb->port_mode == MUSB_PORT_MODE_DUAL_ROLE) + musb->port_mode == MUSB_OTG) dsps_mod_timer(glue, -1); } @@ -231,7 +231,7 @@ static int dsps_check_status(struct musb *musb, void *unused) break; case OTG_STATE_A_WAIT_BCON: /* keep VBUS on for host-only mode */ - if (musb->port_mode == MUSB_PORT_MODE_HOST) { + if (musb->port_mode == MUSB_HOST) { dsps_mod_timer_optional(glue); break; } @@ -1028,7 +1028,7 @@ static int dsps_resume(struct device *dev) musb_writel(mbase, wrp->tx_mode, glue->context.tx_mode); musb_writel(mbase, wrp->rx_mode, glue->context.rx_mode); if (musb->xceiv->otg->state == OTG_STATE_B_IDLE && - musb->port_mode == MUSB_PORT_MODE_DUAL_ROLE) + musb->port_mode == MUSB_OTG) dsps_mod_timer(glue, -1); pm_runtime_put(dev); diff --git a/drivers/usb/musb/musb_gadget.c b/drivers/usb/musb/musb_gadget.c index 71c5835..d082b0c 100644 --- a/drivers/usb/musb/musb_gadget.c +++ b/drivers/usb/musb/musb_gadget.c @@ -1823,7 +1823,7 @@ err: void musb_gadget_cleanup(struct musb *musb) { - if (musb->port_mode == MUSB_PORT_MODE_HOST) + if (musb->port_mode == MUSB_HOST) return; cancel_delayed_work_sync(&musb->gadget_work); diff --git a/drivers/usb/musb/musb_host.c b/drivers/usb/musb/musb_host.c index 15a42ce..c8d0617 100644 --- a/drivers/usb/musb/musb_host.c +++ b/drivers/usb/musb/musb_host.c @@ -2735,7 +2735,7 @@ int musb_host_alloc(struct musb *musb) void musb_host_cleanup(struct musb *musb) { - if (musb->port_mode == MUSB_PORT_MODE_GADGET) + if (musb->port_mode == MUSB_PERIPHERAL) return; usb_remove_hcd(musb->hcd); } @@ -2750,7 +2750,7 @@ int musb_host_setup(struct musb *musb, int power_budget) int ret; struct usb_hcd *hcd = musb->hcd; - if (musb->port_mode == MUSB_PORT_MODE_HOST) { + if (musb->port_mode == MUSB_HOST) { MUSB_HST_MODE(musb); musb->xceiv->otg->default_a = 1; musb->xceiv->otg->state = OTG_STATE_A_IDLE; diff --git a/drivers/usb/musb/musb_virthub.c b/drivers/usb/musb/musb_virthub.c index 2f8dd98..a84ec27 100644 --- a/drivers/usb/musb/musb_virthub.c +++ b/drivers/usb/musb/musb_virthub.c @@ -254,7 +254,7 @@ static int musb_has_gadget(struct musb *musb) #ifdef CONFIG_USB_MUSB_HOST return 1; #else - return musb->port_mode == MUSB_PORT_MODE_HOST; + return musb->port_mode == MUSB_HOST; #endif } diff --git a/drivers/usb/musb/sunxi.c b/drivers/usb/musb/sunxi.c index 2d20121..8f7d378 100644 --- a/drivers/usb/musb/sunxi.c +++ b/drivers/usb/musb/sunxi.c @@ -347,7 +347,7 @@ static int sunxi_musb_set_mode(struct musb *musb, u8 mode) if (glue->phy_mode == new_mode) return 0; - if (musb->port_mode != MUSB_PORT_MODE_DUAL_ROLE) { + if (musb->port_mode != MUSB_OTG) { dev_err(musb->controller->parent, "Error changing modes is only supported in dual role mode\n"); return -EINVAL; @@ -690,19 +690,19 @@ static int sunxi_musb_probe(struct platform_device *pdev) switch (usb_get_dr_mode(&pdev->dev)) { #if defined CONFIG_USB_MUSB_DUAL_ROLE || defined CONFIG_USB_MUSB_HOST case USB_DR_MODE_HOST: - pdata.mode = MUSB_PORT_MODE_HOST; + pdata.mode = MUSB_HOST; glue->phy_mode = PHY_MODE_USB_HOST; break; #endif #if defined CONFIG_USB_MUSB_DUAL_ROLE || defined CONFIG_USB_MUSB_GADGET case USB_DR_MODE_PERIPHERAL: - pdata.mode = MUSB_PORT_MODE_GADGET; + pdata.mode = MUSB_PERIPHERAL; glue->phy_mode = PHY_MODE_USB_DEVICE; break; #endif #ifdef CONFIG_USB_MUSB_DUAL_ROLE case USB_DR_MODE_OTG: - pdata.mode = MUSB_PORT_MODE_DUAL_ROLE; + pdata.mode = MUSB_OTG; glue->phy_mode = PHY_MODE_USB_OTG; break; #endif -- cgit v1.1 From 2bc2e05f925dda7caaec4b715f4a22cb58e23393 Mon Sep 17 00:00:00 2001 From: Bin Liu Date: Mon, 21 May 2018 08:42:16 -0500 Subject: usb: musb: remove unused members in struct musb_hdrc_config The following members in struct musb_hdrc_config are not used, so remove them. soft_con utm_16 big_endian mult_bulk_tx mult_bulk_rx high_iso_tx high_iso_rx dma dma_channels dyn_fifo_size vendor_ctrl vendor_stat vendor_req dma_req_chan musb_hdrc_eps_bits Signed-off-by: Bin Liu Signed-off-by: Greg Kroah-Hartman --- drivers/usb/musb/sunxi.c | 4 ---- 1 file changed, 4 deletions(-) (limited to 'drivers/usb') diff --git a/drivers/usb/musb/sunxi.c b/drivers/usb/musb/sunxi.c index 8f7d378..62ab2ca 100644 --- a/drivers/usb/musb/sunxi.c +++ b/drivers/usb/musb/sunxi.c @@ -651,10 +651,8 @@ static const struct musb_hdrc_config sunxi_musb_hdrc_config = { .fifo_cfg_size = ARRAY_SIZE(sunxi_musb_mode_cfg), .multipoint = true, .dyn_fifo = true, - .soft_con = true, .num_eps = SUNXI_MUSB_MAX_EP_NUM, .ram_bits = SUNXI_MUSB_RAM_BITS, - .dma = 0, }; static struct musb_hdrc_config sunxi_musb_hdrc_config_h3 = { @@ -662,10 +660,8 @@ static struct musb_hdrc_config sunxi_musb_hdrc_config_h3 = { .fifo_cfg_size = ARRAY_SIZE(sunxi_musb_mode_cfg_h3), .multipoint = true, .dyn_fifo = true, - .soft_con = true, .num_eps = SUNXI_MUSB_MAX_EP_NUM_H3, .ram_bits = SUNXI_MUSB_RAM_BITS, - .dma = 0, }; -- cgit v1.1 From bcb8fd3a2fba82d5f53f9a598f9b5e14823dfb68 Mon Sep 17 00:00:00 2001 From: Bin Liu Date: Mon, 21 May 2018 08:42:17 -0500 Subject: usb: musb: break the huge isr musb_stage0_irq() into small functions musb_stage0_irq() is 400+ lines long. Break its interrupt events handling into each individual functions to make it easy to read. Signed-off-by: Bin Liu Signed-off-by: Greg Kroah-Hartman --- drivers/usb/musb/musb_core.c | 730 +++++++++++++++++++++++-------------------- 1 file changed, 384 insertions(+), 346 deletions(-) (limited to 'drivers/usb') diff --git a/drivers/usb/musb/musb_core.c b/drivers/usb/musb/musb_core.c index ce54f48..a3a7161 100644 --- a/drivers/usb/musb/musb_core.c +++ b/drivers/usb/musb/musb_core.c @@ -523,6 +523,383 @@ void musb_hnp_stop(struct musb *musb) static void musb_recover_from_babble(struct musb *musb); +static void musb_handle_intr_resume(struct musb *musb, u8 devctl) +{ + musb_dbg(musb, "RESUME (%s)", + usb_otg_state_string(musb->xceiv->otg->state)); + + if (devctl & MUSB_DEVCTL_HM) { + switch (musb->xceiv->otg->state) { + case OTG_STATE_A_SUSPEND: + /* remote wakeup? */ + musb->port1_status |= + (USB_PORT_STAT_C_SUSPEND << 16) + | MUSB_PORT_STAT_RESUME; + musb->rh_timer = jiffies + + msecs_to_jiffies(USB_RESUME_TIMEOUT); + musb->xceiv->otg->state = OTG_STATE_A_HOST; + musb->is_active = 1; + musb_host_resume_root_hub(musb); + schedule_delayed_work(&musb->finish_resume_work, + msecs_to_jiffies(USB_RESUME_TIMEOUT)); + break; + case OTG_STATE_B_WAIT_ACON: + musb->xceiv->otg->state = OTG_STATE_B_PERIPHERAL; + musb->is_active = 1; + MUSB_DEV_MODE(musb); + break; + default: + WARNING("bogus %s RESUME (%s)\n", + "host", + usb_otg_state_string(musb->xceiv->otg->state)); + } + } else { + switch (musb->xceiv->otg->state) { + case OTG_STATE_A_SUSPEND: + /* possibly DISCONNECT is upcoming */ + musb->xceiv->otg->state = OTG_STATE_A_HOST; + musb_host_resume_root_hub(musb); + break; + case OTG_STATE_B_WAIT_ACON: + case OTG_STATE_B_PERIPHERAL: + /* disconnect while suspended? we may + * not get a disconnect irq... + */ + if ((devctl & MUSB_DEVCTL_VBUS) + != (3 << MUSB_DEVCTL_VBUS_SHIFT) + ) { + musb->int_usb |= MUSB_INTR_DISCONNECT; + musb->int_usb &= ~MUSB_INTR_SUSPEND; + break; + } + musb_g_resume(musb); + break; + case OTG_STATE_B_IDLE: + musb->int_usb &= ~MUSB_INTR_SUSPEND; + break; + default: + WARNING("bogus %s RESUME (%s)\n", + "peripheral", + usb_otg_state_string(musb->xceiv->otg->state)); + } + } +} + +/* return IRQ_HANDLED to tell the caller to return immediately */ +static irqreturn_t musb_handle_intr_sessreq(struct musb *musb, u8 devctl) +{ + void __iomem *mbase = musb->mregs; + + if ((devctl & MUSB_DEVCTL_VBUS) == MUSB_DEVCTL_VBUS + && (devctl & MUSB_DEVCTL_BDEVICE)) { + musb_dbg(musb, "SessReq while on B state"); + return IRQ_HANDLED; + } + + musb_dbg(musb, "SESSION_REQUEST (%s)", + usb_otg_state_string(musb->xceiv->otg->state)); + + /* IRQ arrives from ID pin sense or (later, if VBUS power + * is removed) SRP. responses are time critical: + * - turn on VBUS (with silicon-specific mechanism) + * - go through A_WAIT_VRISE + * - ... to A_WAIT_BCON. + * a_wait_vrise_tmout triggers VBUS_ERROR transitions + */ + musb_writeb(mbase, MUSB_DEVCTL, MUSB_DEVCTL_SESSION); + musb->ep0_stage = MUSB_EP0_START; + musb->xceiv->otg->state = OTG_STATE_A_IDLE; + MUSB_HST_MODE(musb); + musb_platform_set_vbus(musb, 1); + + return IRQ_NONE; +} + +static void musb_handle_intr_vbuserr(struct musb *musb, u8 devctl) +{ + int ignore = 0; + + /* During connection as an A-Device, we may see a short + * current spikes causing voltage drop, because of cable + * and peripheral capacitance combined with vbus draw. + * (So: less common with truly self-powered devices, where + * vbus doesn't act like a power supply.) + * + * Such spikes are short; usually less than ~500 usec, max + * of ~2 msec. That is, they're not sustained overcurrent + * errors, though they're reported using VBUSERROR irqs. + * + * Workarounds: (a) hardware: use self powered devices. + * (b) software: ignore non-repeated VBUS errors. + * + * REVISIT: do delays from lots of DEBUG_KERNEL checks + * make trouble here, keeping VBUS < 4.4V ? + */ + switch (musb->xceiv->otg->state) { + case OTG_STATE_A_HOST: + /* recovery is dicey once we've gotten past the + * initial stages of enumeration, but if VBUS + * stayed ok at the other end of the link, and + * another reset is due (at least for high speed, + * to redo the chirp etc), it might work OK... + */ + case OTG_STATE_A_WAIT_BCON: + case OTG_STATE_A_WAIT_VRISE: + if (musb->vbuserr_retry) { + void __iomem *mbase = musb->mregs; + + musb->vbuserr_retry--; + ignore = 1; + devctl |= MUSB_DEVCTL_SESSION; + musb_writeb(mbase, MUSB_DEVCTL, devctl); + } else { + musb->port1_status |= + USB_PORT_STAT_OVERCURRENT + | (USB_PORT_STAT_C_OVERCURRENT << 16); + } + break; + default: + break; + } + + dev_printk(ignore ? KERN_DEBUG : KERN_ERR, musb->controller, + "VBUS_ERROR in %s (%02x, %s), retry #%d, port1 %08x\n", + usb_otg_state_string(musb->xceiv->otg->state), + devctl, + ({ char *s; + switch (devctl & MUSB_DEVCTL_VBUS) { + case 0 << MUSB_DEVCTL_VBUS_SHIFT: + s = "vbuserr_retry, + musb->port1_status); + + /* go through A_WAIT_VFALL then start a new session */ + if (!ignore) + musb_platform_set_vbus(musb, 0); +} + +static void musb_handle_intr_suspend(struct musb *musb, u8 devctl) +{ + musb_dbg(musb, "SUSPEND (%s) devctl %02x", + usb_otg_state_string(musb->xceiv->otg->state), devctl); + + switch (musb->xceiv->otg->state) { + case OTG_STATE_A_PERIPHERAL: + /* We also come here if the cable is removed, since + * this silicon doesn't report ID-no-longer-grounded. + * + * We depend on T(a_wait_bcon) to shut us down, and + * hope users don't do anything dicey during this + * undesired detour through A_WAIT_BCON. + */ + musb_hnp_stop(musb); + musb_host_resume_root_hub(musb); + musb_root_disconnect(musb); + musb_platform_try_idle(musb, jiffies + + msecs_to_jiffies(musb->a_wait_bcon + ? : OTG_TIME_A_WAIT_BCON)); + + break; + case OTG_STATE_B_IDLE: + if (!musb->is_active) + break; + /* fall through */ + case OTG_STATE_B_PERIPHERAL: + musb_g_suspend(musb); + musb->is_active = musb->g.b_hnp_enable; + if (musb->is_active) { + musb->xceiv->otg->state = OTG_STATE_B_WAIT_ACON; + musb_dbg(musb, "HNP: Setting timer for b_ase0_brst"); + mod_timer(&musb->otg_timer, jiffies + + msecs_to_jiffies( + OTG_TIME_B_ASE0_BRST)); + } + break; + case OTG_STATE_A_WAIT_BCON: + if (musb->a_wait_bcon != 0) + musb_platform_try_idle(musb, jiffies + + msecs_to_jiffies(musb->a_wait_bcon)); + break; + case OTG_STATE_A_HOST: + musb->xceiv->otg->state = OTG_STATE_A_SUSPEND; + musb->is_active = musb->hcd->self.b_hnp_enable; + break; + case OTG_STATE_B_HOST: + /* Transition to B_PERIPHERAL, see 6.8.2.6 p 44 */ + musb_dbg(musb, "REVISIT: SUSPEND as B_HOST"); + break; + default: + /* "should not happen" */ + musb->is_active = 0; + break; + } +} + +static void musb_handle_intr_connect(struct musb *musb, u8 devctl, u8 int_usb) +{ + struct usb_hcd *hcd = musb->hcd; + + musb->is_active = 1; + musb->ep0_stage = MUSB_EP0_START; + + musb->intrtxe = musb->epmask; + musb_writew(musb->mregs, MUSB_INTRTXE, musb->intrtxe); + musb->intrrxe = musb->epmask & 0xfffe; + musb_writew(musb->mregs, MUSB_INTRRXE, musb->intrrxe); + musb_writeb(musb->mregs, MUSB_INTRUSBE, 0xf7); + musb->port1_status &= ~(USB_PORT_STAT_LOW_SPEED + |USB_PORT_STAT_HIGH_SPEED + |USB_PORT_STAT_ENABLE + ); + musb->port1_status |= USB_PORT_STAT_CONNECTION + |(USB_PORT_STAT_C_CONNECTION << 16); + + /* high vs full speed is just a guess until after reset */ + if (devctl & MUSB_DEVCTL_LSDEV) + musb->port1_status |= USB_PORT_STAT_LOW_SPEED; + + /* indicate new connection to OTG machine */ + switch (musb->xceiv->otg->state) { + case OTG_STATE_B_PERIPHERAL: + if (int_usb & MUSB_INTR_SUSPEND) { + musb_dbg(musb, "HNP: SUSPEND+CONNECT, now b_host"); + int_usb &= ~MUSB_INTR_SUSPEND; + goto b_host; + } else + musb_dbg(musb, "CONNECT as b_peripheral???"); + break; + case OTG_STATE_B_WAIT_ACON: + musb_dbg(musb, "HNP: CONNECT, now b_host"); +b_host: + musb->xceiv->otg->state = OTG_STATE_B_HOST; + if (musb->hcd) + musb->hcd->self.is_b_host = 1; + del_timer(&musb->otg_timer); + break; + default: + if ((devctl & MUSB_DEVCTL_VBUS) + == (3 << MUSB_DEVCTL_VBUS_SHIFT)) { + musb->xceiv->otg->state = OTG_STATE_A_HOST; + if (hcd) + hcd->self.is_b_host = 0; + } + break; + } + + musb_host_poke_root_hub(musb); + + musb_dbg(musb, "CONNECT (%s) devctl %02x", + usb_otg_state_string(musb->xceiv->otg->state), devctl); +} + +static void musb_handle_intr_disconnect(struct musb *musb, u8 devctl) +{ + musb_dbg(musb, "DISCONNECT (%s) as %s, devctl %02x", + usb_otg_state_string(musb->xceiv->otg->state), + MUSB_MODE(musb), devctl); + + switch (musb->xceiv->otg->state) { + case OTG_STATE_A_HOST: + case OTG_STATE_A_SUSPEND: + musb_host_resume_root_hub(musb); + musb_root_disconnect(musb); + if (musb->a_wait_bcon != 0) + musb_platform_try_idle(musb, jiffies + + msecs_to_jiffies(musb->a_wait_bcon)); + break; + case OTG_STATE_B_HOST: + /* REVISIT this behaves for "real disconnect" + * cases; make sure the other transitions from + * from B_HOST act right too. The B_HOST code + * in hnp_stop() is currently not used... + */ + musb_root_disconnect(musb); + if (musb->hcd) + musb->hcd->self.is_b_host = 0; + musb->xceiv->otg->state = OTG_STATE_B_PERIPHERAL; + MUSB_DEV_MODE(musb); + musb_g_disconnect(musb); + break; + case OTG_STATE_A_PERIPHERAL: + musb_hnp_stop(musb); + musb_root_disconnect(musb); + /* FALLTHROUGH */ + case OTG_STATE_B_WAIT_ACON: + /* FALLTHROUGH */ + case OTG_STATE_B_PERIPHERAL: + case OTG_STATE_B_IDLE: + musb_g_disconnect(musb); + break; + default: + WARNING("unhandled DISCONNECT transition (%s)\n", + usb_otg_state_string(musb->xceiv->otg->state)); + break; + } +} + +/* + * mentor saves a bit: bus reset and babble share the same irq. + * only host sees babble; only peripheral sees bus reset. + */ +static void musb_handle_intr_reset(struct musb *musb) +{ + if (is_host_active(musb)) { + /* + * When BABBLE happens what we can depends on which + * platform MUSB is running, because some platforms + * implemented proprietary means for 'recovering' from + * Babble conditions. One such platform is AM335x. In + * most cases, however, the only thing we can do is + * drop the session. + */ + dev_err(musb->controller, "Babble\n"); + musb_recover_from_babble(musb); + } else { + musb_dbg(musb, "BUS RESET as %s", + usb_otg_state_string(musb->xceiv->otg->state)); + switch (musb->xceiv->otg->state) { + case OTG_STATE_A_SUSPEND: + musb_g_reset(musb); + /* FALLTHROUGH */ + case OTG_STATE_A_WAIT_BCON: /* OPT TD.4.7-900ms */ + /* never use invalid T(a_wait_bcon) */ + musb_dbg(musb, "HNP: in %s, %d msec timeout", + usb_otg_state_string(musb->xceiv->otg->state), + TA_WAIT_BCON(musb)); + mod_timer(&musb->otg_timer, jiffies + + msecs_to_jiffies(TA_WAIT_BCON(musb))); + break; + case OTG_STATE_A_PERIPHERAL: + del_timer(&musb->otg_timer); + musb_g_reset(musb); + break; + case OTG_STATE_B_WAIT_ACON: + musb_dbg(musb, "HNP: RESET (%s), to b_peripheral", + usb_otg_state_string(musb->xceiv->otg->state)); + musb->xceiv->otg->state = OTG_STATE_B_PERIPHERAL; + musb_g_reset(musb); + break; + case OTG_STATE_B_IDLE: + musb->xceiv->otg->state = OTG_STATE_B_PERIPHERAL; + /* FALLTHROUGH */ + case OTG_STATE_B_PERIPHERAL: + musb_g_reset(musb); + break; + default: + musb_dbg(musb, "Unhandled BUS RESET as %s", + usb_otg_state_string(musb->xceiv->otg->state)); + } + } +} + /* * Interrupt Service Routine to record USB "global" interrupts. * Since these do not happen often and signify things of @@ -547,379 +924,40 @@ static irqreturn_t musb_stage0_irq(struct musb *musb, u8 int_usb, * spurious RESUME irqs happen too, paired with SUSPEND. */ if (int_usb & MUSB_INTR_RESUME) { + musb_handle_intr_resume(musb, devctl); handled = IRQ_HANDLED; - musb_dbg(musb, "RESUME (%s)", - usb_otg_state_string(musb->xceiv->otg->state)); - - if (devctl & MUSB_DEVCTL_HM) { - switch (musb->xceiv->otg->state) { - case OTG_STATE_A_SUSPEND: - /* remote wakeup? */ - musb->port1_status |= - (USB_PORT_STAT_C_SUSPEND << 16) - | MUSB_PORT_STAT_RESUME; - musb->rh_timer = jiffies - + msecs_to_jiffies(USB_RESUME_TIMEOUT); - musb->xceiv->otg->state = OTG_STATE_A_HOST; - musb->is_active = 1; - musb_host_resume_root_hub(musb); - schedule_delayed_work(&musb->finish_resume_work, - msecs_to_jiffies(USB_RESUME_TIMEOUT)); - break; - case OTG_STATE_B_WAIT_ACON: - musb->xceiv->otg->state = OTG_STATE_B_PERIPHERAL; - musb->is_active = 1; - MUSB_DEV_MODE(musb); - break; - default: - WARNING("bogus %s RESUME (%s)\n", - "host", - usb_otg_state_string(musb->xceiv->otg->state)); - } - } else { - switch (musb->xceiv->otg->state) { - case OTG_STATE_A_SUSPEND: - /* possibly DISCONNECT is upcoming */ - musb->xceiv->otg->state = OTG_STATE_A_HOST; - musb_host_resume_root_hub(musb); - break; - case OTG_STATE_B_WAIT_ACON: - case OTG_STATE_B_PERIPHERAL: - /* disconnect while suspended? we may - * not get a disconnect irq... - */ - if ((devctl & MUSB_DEVCTL_VBUS) - != (3 << MUSB_DEVCTL_VBUS_SHIFT) - ) { - musb->int_usb |= MUSB_INTR_DISCONNECT; - musb->int_usb &= ~MUSB_INTR_SUSPEND; - break; - } - musb_g_resume(musb); - break; - case OTG_STATE_B_IDLE: - musb->int_usb &= ~MUSB_INTR_SUSPEND; - break; - default: - WARNING("bogus %s RESUME (%s)\n", - "peripheral", - usb_otg_state_string(musb->xceiv->otg->state)); - } - } } /* see manual for the order of the tests */ if (int_usb & MUSB_INTR_SESSREQ) { - void __iomem *mbase = musb->mregs; - - if ((devctl & MUSB_DEVCTL_VBUS) == MUSB_DEVCTL_VBUS - && (devctl & MUSB_DEVCTL_BDEVICE)) { - musb_dbg(musb, "SessReq while on B state"); + if (musb_handle_intr_sessreq(musb, devctl)) return IRQ_HANDLED; - } - - musb_dbg(musb, "SESSION_REQUEST (%s)", - usb_otg_state_string(musb->xceiv->otg->state)); - - /* IRQ arrives from ID pin sense or (later, if VBUS power - * is removed) SRP. responses are time critical: - * - turn on VBUS (with silicon-specific mechanism) - * - go through A_WAIT_VRISE - * - ... to A_WAIT_BCON. - * a_wait_vrise_tmout triggers VBUS_ERROR transitions - */ - musb_writeb(mbase, MUSB_DEVCTL, MUSB_DEVCTL_SESSION); - musb->ep0_stage = MUSB_EP0_START; - musb->xceiv->otg->state = OTG_STATE_A_IDLE; - MUSB_HST_MODE(musb); - musb_platform_set_vbus(musb, 1); - handled = IRQ_HANDLED; } if (int_usb & MUSB_INTR_VBUSERROR) { - int ignore = 0; - - /* During connection as an A-Device, we may see a short - * current spikes causing voltage drop, because of cable - * and peripheral capacitance combined with vbus draw. - * (So: less common with truly self-powered devices, where - * vbus doesn't act like a power supply.) - * - * Such spikes are short; usually less than ~500 usec, max - * of ~2 msec. That is, they're not sustained overcurrent - * errors, though they're reported using VBUSERROR irqs. - * - * Workarounds: (a) hardware: use self powered devices. - * (b) software: ignore non-repeated VBUS errors. - * - * REVISIT: do delays from lots of DEBUG_KERNEL checks - * make trouble here, keeping VBUS < 4.4V ? - */ - switch (musb->xceiv->otg->state) { - case OTG_STATE_A_HOST: - /* recovery is dicey once we've gotten past the - * initial stages of enumeration, but if VBUS - * stayed ok at the other end of the link, and - * another reset is due (at least for high speed, - * to redo the chirp etc), it might work OK... - */ - case OTG_STATE_A_WAIT_BCON: - case OTG_STATE_A_WAIT_VRISE: - if (musb->vbuserr_retry) { - void __iomem *mbase = musb->mregs; - - musb->vbuserr_retry--; - ignore = 1; - devctl |= MUSB_DEVCTL_SESSION; - musb_writeb(mbase, MUSB_DEVCTL, devctl); - } else { - musb->port1_status |= - USB_PORT_STAT_OVERCURRENT - | (USB_PORT_STAT_C_OVERCURRENT << 16); - } - break; - default: - break; - } - - dev_printk(ignore ? KERN_DEBUG : KERN_ERR, musb->controller, - "VBUS_ERROR in %s (%02x, %s), retry #%d, port1 %08x\n", - usb_otg_state_string(musb->xceiv->otg->state), - devctl, - ({ char *s; - switch (devctl & MUSB_DEVCTL_VBUS) { - case 0 << MUSB_DEVCTL_VBUS_SHIFT: - s = "vbuserr_retry, - musb->port1_status); - - /* go through A_WAIT_VFALL then start a new session */ - if (!ignore) - musb_platform_set_vbus(musb, 0); + musb_handle_intr_vbuserr(musb, devctl); handled = IRQ_HANDLED; } if (int_usb & MUSB_INTR_SUSPEND) { - musb_dbg(musb, "SUSPEND (%s) devctl %02x", - usb_otg_state_string(musb->xceiv->otg->state), devctl); + musb_handle_intr_suspend(musb, devctl); handled = IRQ_HANDLED; - - switch (musb->xceiv->otg->state) { - case OTG_STATE_A_PERIPHERAL: - /* We also come here if the cable is removed, since - * this silicon doesn't report ID-no-longer-grounded. - * - * We depend on T(a_wait_bcon) to shut us down, and - * hope users don't do anything dicey during this - * undesired detour through A_WAIT_BCON. - */ - musb_hnp_stop(musb); - musb_host_resume_root_hub(musb); - musb_root_disconnect(musb); - musb_platform_try_idle(musb, jiffies - + msecs_to_jiffies(musb->a_wait_bcon - ? : OTG_TIME_A_WAIT_BCON)); - - break; - case OTG_STATE_B_IDLE: - if (!musb->is_active) - break; - /* fall through */ - case OTG_STATE_B_PERIPHERAL: - musb_g_suspend(musb); - musb->is_active = musb->g.b_hnp_enable; - if (musb->is_active) { - musb->xceiv->otg->state = OTG_STATE_B_WAIT_ACON; - musb_dbg(musb, "HNP: Setting timer for b_ase0_brst"); - mod_timer(&musb->otg_timer, jiffies - + msecs_to_jiffies( - OTG_TIME_B_ASE0_BRST)); - } - break; - case OTG_STATE_A_WAIT_BCON: - if (musb->a_wait_bcon != 0) - musb_platform_try_idle(musb, jiffies - + msecs_to_jiffies(musb->a_wait_bcon)); - break; - case OTG_STATE_A_HOST: - musb->xceiv->otg->state = OTG_STATE_A_SUSPEND; - musb->is_active = musb->hcd->self.b_hnp_enable; - break; - case OTG_STATE_B_HOST: - /* Transition to B_PERIPHERAL, see 6.8.2.6 p 44 */ - musb_dbg(musb, "REVISIT: SUSPEND as B_HOST"); - break; - default: - /* "should not happen" */ - musb->is_active = 0; - break; - } } if (int_usb & MUSB_INTR_CONNECT) { - struct usb_hcd *hcd = musb->hcd; - + musb_handle_intr_connect(musb, devctl, int_usb); handled = IRQ_HANDLED; - musb->is_active = 1; - - musb->ep0_stage = MUSB_EP0_START; - - musb->intrtxe = musb->epmask; - musb_writew(musb->mregs, MUSB_INTRTXE, musb->intrtxe); - musb->intrrxe = musb->epmask & 0xfffe; - musb_writew(musb->mregs, MUSB_INTRRXE, musb->intrrxe); - musb_writeb(musb->mregs, MUSB_INTRUSBE, 0xf7); - musb->port1_status &= ~(USB_PORT_STAT_LOW_SPEED - |USB_PORT_STAT_HIGH_SPEED - |USB_PORT_STAT_ENABLE - ); - musb->port1_status |= USB_PORT_STAT_CONNECTION - |(USB_PORT_STAT_C_CONNECTION << 16); - - /* high vs full speed is just a guess until after reset */ - if (devctl & MUSB_DEVCTL_LSDEV) - musb->port1_status |= USB_PORT_STAT_LOW_SPEED; - - /* indicate new connection to OTG machine */ - switch (musb->xceiv->otg->state) { - case OTG_STATE_B_PERIPHERAL: - if (int_usb & MUSB_INTR_SUSPEND) { - musb_dbg(musb, "HNP: SUSPEND+CONNECT, now b_host"); - int_usb &= ~MUSB_INTR_SUSPEND; - goto b_host; - } else - musb_dbg(musb, "CONNECT as b_peripheral???"); - break; - case OTG_STATE_B_WAIT_ACON: - musb_dbg(musb, "HNP: CONNECT, now b_host"); -b_host: - musb->xceiv->otg->state = OTG_STATE_B_HOST; - if (musb->hcd) - musb->hcd->self.is_b_host = 1; - del_timer(&musb->otg_timer); - break; - default: - if ((devctl & MUSB_DEVCTL_VBUS) - == (3 << MUSB_DEVCTL_VBUS_SHIFT)) { - musb->xceiv->otg->state = OTG_STATE_A_HOST; - if (hcd) - hcd->self.is_b_host = 0; - } - break; - } - - musb_host_poke_root_hub(musb); - - musb_dbg(musb, "CONNECT (%s) devctl %02x", - usb_otg_state_string(musb->xceiv->otg->state), devctl); } if (int_usb & MUSB_INTR_DISCONNECT) { - musb_dbg(musb, "DISCONNECT (%s) as %s, devctl %02x", - usb_otg_state_string(musb->xceiv->otg->state), - MUSB_MODE(musb), devctl); + musb_handle_intr_disconnect(musb, devctl); handled = IRQ_HANDLED; - - switch (musb->xceiv->otg->state) { - case OTG_STATE_A_HOST: - case OTG_STATE_A_SUSPEND: - musb_host_resume_root_hub(musb); - musb_root_disconnect(musb); - if (musb->a_wait_bcon != 0) - musb_platform_try_idle(musb, jiffies - + msecs_to_jiffies(musb->a_wait_bcon)); - break; - case OTG_STATE_B_HOST: - /* REVISIT this behaves for "real disconnect" - * cases; make sure the other transitions from - * from B_HOST act right too. The B_HOST code - * in hnp_stop() is currently not used... - */ - musb_root_disconnect(musb); - if (musb->hcd) - musb->hcd->self.is_b_host = 0; - musb->xceiv->otg->state = OTG_STATE_B_PERIPHERAL; - MUSB_DEV_MODE(musb); - musb_g_disconnect(musb); - break; - case OTG_STATE_A_PERIPHERAL: - musb_hnp_stop(musb); - musb_root_disconnect(musb); - /* FALLTHROUGH */ - case OTG_STATE_B_WAIT_ACON: - /* FALLTHROUGH */ - case OTG_STATE_B_PERIPHERAL: - case OTG_STATE_B_IDLE: - musb_g_disconnect(musb); - break; - default: - WARNING("unhandled DISCONNECT transition (%s)\n", - usb_otg_state_string(musb->xceiv->otg->state)); - break; - } } - /* mentor saves a bit: bus reset and babble share the same irq. - * only host sees babble; only peripheral sees bus reset. - */ if (int_usb & MUSB_INTR_RESET) { + musb_handle_intr_reset(musb); handled = IRQ_HANDLED; - if (is_host_active(musb)) { - /* - * When BABBLE happens what we can depends on which - * platform MUSB is running, because some platforms - * implemented proprietary means for 'recovering' from - * Babble conditions. One such platform is AM335x. In - * most cases, however, the only thing we can do is - * drop the session. - */ - dev_err(musb->controller, "Babble\n"); - musb_recover_from_babble(musb); - } else { - musb_dbg(musb, "BUS RESET as %s", - usb_otg_state_string(musb->xceiv->otg->state)); - switch (musb->xceiv->otg->state) { - case OTG_STATE_A_SUSPEND: - musb_g_reset(musb); - /* FALLTHROUGH */ - case OTG_STATE_A_WAIT_BCON: /* OPT TD.4.7-900ms */ - /* never use invalid T(a_wait_bcon) */ - musb_dbg(musb, "HNP: in %s, %d msec timeout", - usb_otg_state_string(musb->xceiv->otg->state), - TA_WAIT_BCON(musb)); - mod_timer(&musb->otg_timer, jiffies - + msecs_to_jiffies(TA_WAIT_BCON(musb))); - break; - case OTG_STATE_A_PERIPHERAL: - del_timer(&musb->otg_timer); - musb_g_reset(musb); - break; - case OTG_STATE_B_WAIT_ACON: - musb_dbg(musb, "HNP: RESET (%s), to b_peripheral", - usb_otg_state_string(musb->xceiv->otg->state)); - musb->xceiv->otg->state = OTG_STATE_B_PERIPHERAL; - musb_g_reset(musb); - break; - case OTG_STATE_B_IDLE: - musb->xceiv->otg->state = OTG_STATE_B_PERIPHERAL; - /* FALLTHROUGH */ - case OTG_STATE_B_PERIPHERAL: - musb_g_reset(musb); - break; - default: - musb_dbg(musb, "Unhandled BUS RESET as %s", - usb_otg_state_string(musb->xceiv->otg->state)); - } - } } #if 0 -- cgit v1.1 From d2852f2d3e6d6b9de3739f95b5cd9eab3157af37 Mon Sep 17 00:00:00 2001 From: Bin Liu Date: Mon, 21 May 2018 08:42:18 -0500 Subject: usb: musb: remove references to default_a of struct usb_otg musb drivers do not use the otg fsm framework, so referencing to otg->default_a doesn't have any effect, so remove the references. But tusb6010 glue driver uses it locally to control the vbus power, so keep the references in tusb6010 only. Signed-off-by: Bin Liu Signed-off-by: Greg Kroah-Hartman --- drivers/usb/musb/am35x.c | 3 --- drivers/usb/musb/da8xx.c | 2 -- drivers/usb/musb/davinci.c | 49 ++++++++++++++++++++---------------------- drivers/usb/musb/musb_core.c | 9 ++------ drivers/usb/musb/musb_dsps.c | 2 -- drivers/usb/musb/musb_gadget.c | 1 - drivers/usb/musb/musb_host.c | 1 - drivers/usb/musb/omap2430.c | 5 ----- drivers/usb/musb/sunxi.c | 2 -- drivers/usb/musb/ux500.c | 2 -- 10 files changed, 25 insertions(+), 51 deletions(-) (limited to 'drivers/usb') diff --git a/drivers/usb/musb/am35x.c b/drivers/usb/musb/am35x.c index 0ad664e..660641a 100644 --- a/drivers/usb/musb/am35x.c +++ b/drivers/usb/musb/am35x.c @@ -201,7 +201,6 @@ static irqreturn_t am35x_musb_interrupt(int irq, void *hci) struct device *dev = musb->controller; struct musb_hdrc_platform_data *plat = dev_get_platdata(dev); struct omap_musb_board_data *data = plat->board_data; - struct usb_otg *otg = musb->xceiv->otg; unsigned long flags; irqreturn_t ret = IRQ_NONE; u32 epintr, usbintr; @@ -264,14 +263,12 @@ static irqreturn_t am35x_musb_interrupt(int irq, void *hci) WARNING("VBUS error workaround (delay coming)\n"); } else if (drvvbus) { MUSB_HST_MODE(musb); - otg->default_a = 1; musb->xceiv->otg->state = OTG_STATE_A_WAIT_VRISE; portstate(musb->port1_status |= USB_PORT_STAT_POWER); del_timer(&musb->dev_timer); } else { musb->is_active = 0; MUSB_DEV_MODE(musb); - otg->default_a = 0; musb->xceiv->otg->state = OTG_STATE_B_IDLE; portstate(musb->port1_status &= ~USB_PORT_STAT_POWER); } diff --git a/drivers/usb/musb/da8xx.c b/drivers/usb/musb/da8xx.c index b8295ce..0e5929e 100644 --- a/drivers/usb/musb/da8xx.c +++ b/drivers/usb/musb/da8xx.c @@ -280,7 +280,6 @@ static irqreturn_t da8xx_musb_interrupt(int irq, void *hci) WARNING("VBUS error workaround (delay coming)\n"); } else if (drvvbus) { MUSB_HST_MODE(musb); - otg->default_a = 1; musb->xceiv->otg->state = OTG_STATE_A_WAIT_VRISE; portstate(musb->port1_status |= USB_PORT_STAT_POWER); del_timer(&musb->dev_timer); @@ -295,7 +294,6 @@ static irqreturn_t da8xx_musb_interrupt(int irq, void *hci) */ musb->is_active = 0; MUSB_DEV_MODE(musb); - otg->default_a = 0; musb->xceiv->otg->state = OTG_STATE_B_IDLE; portstate(musb->port1_status &= ~USB_PORT_STAT_POWER); } diff --git a/drivers/usb/musb/davinci.c b/drivers/usb/musb/davinci.c index 2ad39dc..fb6bbd2 100644 --- a/drivers/usb/musb/davinci.c +++ b/drivers/usb/musb/davinci.c @@ -311,14 +311,12 @@ static irqreturn_t davinci_musb_interrupt(int irq, void *__hci) WARNING("VBUS error workaround (delay coming)\n"); } else if (drvvbus) { MUSB_HST_MODE(musb); - otg->default_a = 1; musb->xceiv->otg->state = OTG_STATE_A_WAIT_VRISE; portstate(musb->port1_status |= USB_PORT_STAT_POWER); del_timer(&musb->dev_timer); } else { musb->is_active = 0; MUSB_DEV_MODE(musb); - otg->default_a = 0; musb->xceiv->otg->state = OTG_STATE_B_IDLE; portstate(musb->port1_status &= ~USB_PORT_STAT_POWER); } @@ -425,6 +423,9 @@ unregister: static int davinci_musb_exit(struct musb *musb) { + int maxdelay = 30; + u8 devctl, warn = 0; + del_timer_sync(&musb->dev_timer); /* force VBUS off */ @@ -438,31 +439,27 @@ static int davinci_musb_exit(struct musb *musb) davinci_musb_source_power(musb, 0 /*off*/, 1); - /* delay, to avoid problems with module reload */ - if (musb->xceiv->otg->default_a) { - int maxdelay = 30; - u8 devctl, warn = 0; + /* + * delay, to avoid problems with module reload. + * if there's no peripheral connected, this can take a + * long time to fall, especially on EVM with huge C133. + */ + do { + devctl = musb_readb(musb->mregs, MUSB_DEVCTL); + if (!(devctl & MUSB_DEVCTL_VBUS)) + break; + if ((devctl & MUSB_DEVCTL_VBUS) != warn) { + warn = devctl & MUSB_DEVCTL_VBUS; + dev_dbg(musb->controller, "VBUS %d\n", + warn >> MUSB_DEVCTL_VBUS_SHIFT); + } + msleep(1000); + maxdelay--; + } while (maxdelay > 0); - /* if there's no peripheral connected, this can take a - * long time to fall, especially on EVM with huge C133. - */ - do { - devctl = musb_readb(musb->mregs, MUSB_DEVCTL); - if (!(devctl & MUSB_DEVCTL_VBUS)) - break; - if ((devctl & MUSB_DEVCTL_VBUS) != warn) { - warn = devctl & MUSB_DEVCTL_VBUS; - dev_dbg(musb->controller, "VBUS %d\n", - warn >> MUSB_DEVCTL_VBUS_SHIFT); - } - msleep(1000); - maxdelay--; - } while (maxdelay > 0); - - /* in OTG mode, another host might be connected */ - if (devctl & MUSB_DEVCTL_VBUS) - dev_dbg(musb->controller, "VBUS off timeout (devctl %02x)\n", devctl); - } + /* in OTG mode, another host might be connected */ + if (devctl & MUSB_DEVCTL_VBUS) + dev_dbg(musb->controller, "VBUS off timeout (devctl %02x)\n", devctl); phy_off(); diff --git a/drivers/usb/musb/musb_core.c b/drivers/usb/musb/musb_core.c index a3a7161..5cc6498 100644 --- a/drivers/usb/musb/musb_core.c +++ b/drivers/usb/musb/musb_core.c @@ -2352,13 +2352,8 @@ musb_init_controller(struct device *dev, int nIrq, void __iomem *ctrl) musb_writeb(musb->mregs, MUSB_ULPI_BUSCONTROL, busctl); } - if (musb->xceiv->otg->default_a) { - MUSB_HST_MODE(musb); - musb->xceiv->otg->state = OTG_STATE_A_IDLE; - } else { - MUSB_DEV_MODE(musb); - musb->xceiv->otg->state = OTG_STATE_B_IDLE; - } + MUSB_DEV_MODE(musb); + musb->xceiv->otg->state = OTG_STATE_B_IDLE; switch (musb->port_mode) { case MUSB_HOST: diff --git a/drivers/usb/musb/musb_dsps.c b/drivers/usb/musb/musb_dsps.c index 71aec85..34e4dda 100644 --- a/drivers/usb/musb/musb_dsps.c +++ b/drivers/usb/musb/musb_dsps.c @@ -360,13 +360,11 @@ static irqreturn_t dsps_interrupt(int irq, void *hci) WARNING("VBUS error workaround (delay coming)\n"); } else if (drvvbus) { MUSB_HST_MODE(musb); - musb->xceiv->otg->default_a = 1; musb->xceiv->otg->state = OTG_STATE_A_WAIT_VRISE; dsps_mod_timer_optional(glue); } else { musb->is_active = 0; MUSB_DEV_MODE(musb); - musb->xceiv->otg->default_a = 0; musb->xceiv->otg->state = OTG_STATE_B_IDLE; } diff --git a/drivers/usb/musb/musb_gadget.c b/drivers/usb/musb/musb_gadget.c index d082b0c..5b8e629 100644 --- a/drivers/usb/musb/musb_gadget.c +++ b/drivers/usb/musb/musb_gadget.c @@ -1794,7 +1794,6 @@ int musb_gadget_setup(struct musb *musb) musb->g.speed = USB_SPEED_UNKNOWN; MUSB_DEV_MODE(musb); - musb->xceiv->otg->default_a = 0; musb->xceiv->otg->state = OTG_STATE_B_IDLE; /* this "gadget" abstracts/virtualizes the controller */ diff --git a/drivers/usb/musb/musb_host.c b/drivers/usb/musb/musb_host.c index c8d0617..cd611a9 100644 --- a/drivers/usb/musb/musb_host.c +++ b/drivers/usb/musb/musb_host.c @@ -2752,7 +2752,6 @@ int musb_host_setup(struct musb *musb, int power_budget) if (musb->port_mode == MUSB_HOST) { MUSB_HST_MODE(musb); - musb->xceiv->otg->default_a = 1; musb->xceiv->otg->state = OTG_STATE_A_IDLE; } otg_set_host(musb->xceiv->otg, &hcd->self); diff --git a/drivers/usb/musb/omap2430.c b/drivers/usb/musb/omap2430.c index 3dd6e1c..b1dd81f 100644 --- a/drivers/usb/musb/omap2430.c +++ b/drivers/usb/musb/omap2430.c @@ -77,7 +77,6 @@ static void omap2430_musb_set_vbus(struct musb *musb, int is_on) otg_set_vbus(otg, 1); } else { musb->is_active = 1; - otg->default_a = 1; musb->xceiv->otg->state = OTG_STATE_A_WAIT_VRISE; devctl |= MUSB_DEVCTL_SESSION; MUSB_HST_MODE(musb); @@ -89,7 +88,6 @@ static void omap2430_musb_set_vbus(struct musb *musb, int is_on) * jumping right to B_IDLE... */ - otg->default_a = 0; musb->xceiv->otg->state = OTG_STATE_B_IDLE; devctl &= ~MUSB_DEVCTL_SESSION; @@ -148,14 +146,12 @@ static void omap_musb_set_mailbox(struct omap2430_glue *glue) struct musb_hdrc_platform_data *pdata = dev_get_platdata(musb->controller); struct omap_musb_board_data *data = pdata->board_data; - struct usb_otg *otg = musb->xceiv->otg; pm_runtime_get_sync(musb->controller); switch (glue->status) { case MUSB_ID_GROUND: dev_dbg(musb->controller, "ID GND\n"); - otg->default_a = true; musb->xceiv->otg->state = OTG_STATE_A_IDLE; musb->xceiv->last_event = USB_EVENT_ID; if (musb->gadget_driver) { @@ -168,7 +164,6 @@ static void omap_musb_set_mailbox(struct omap2430_glue *glue) case MUSB_VBUS_VALID: dev_dbg(musb->controller, "VBUS Connect\n"); - otg->default_a = false; musb->xceiv->otg->state = OTG_STATE_B_IDLE; musb->xceiv->last_event = USB_EVENT_VBUS; omap_control_usb_set_mode(glue->control_otghs, USB_MODE_DEVICE); diff --git a/drivers/usb/musb/sunxi.c b/drivers/usb/musb/sunxi.c index 62ab2ca..832a41f 100644 --- a/drivers/usb/musb/sunxi.c +++ b/drivers/usb/musb/sunxi.c @@ -105,13 +105,11 @@ static void sunxi_musb_work(struct work_struct *work) devctl = readb(musb->mregs + SUNXI_MUSB_DEVCTL); if (test_bit(SUNXI_MUSB_FL_HOSTMODE, &glue->flags)) { set_bit(SUNXI_MUSB_FL_VBUS_ON, &glue->flags); - musb->xceiv->otg->default_a = 1; musb->xceiv->otg->state = OTG_STATE_A_WAIT_VRISE; MUSB_HST_MODE(musb); devctl |= MUSB_DEVCTL_SESSION; } else { clear_bit(SUNXI_MUSB_FL_VBUS_ON, &glue->flags); - musb->xceiv->otg->default_a = 0; musb->xceiv->otg->state = OTG_STATE_B_IDLE; MUSB_DEV_MODE(musb); devctl &= ~MUSB_DEVCTL_SESSION; diff --git a/drivers/usb/musb/ux500.c b/drivers/usb/musb/ux500.c index 27b4a77..73538d1 100644 --- a/drivers/usb/musb/ux500.c +++ b/drivers/usb/musb/ux500.c @@ -62,7 +62,6 @@ static void ux500_musb_set_vbus(struct musb *musb, int is_on) } else { musb->is_active = 1; - musb->xceiv->otg->default_a = 1; musb->xceiv->otg->state = OTG_STATE_A_WAIT_VRISE; devctl |= MUSB_DEVCTL_SESSION; MUSB_HST_MODE(musb); @@ -73,7 +72,6 @@ static void ux500_musb_set_vbus(struct musb *musb, int is_on) /* NOTE: we're skipping A_WAIT_VFALL -> A_IDLE and jumping * right to B_IDLE... */ - musb->xceiv->otg->default_a = 0; devctl &= ~MUSB_DEVCTL_SESSION; MUSB_DEV_MODE(musb); } -- cgit v1.1 From 0a9134bd733bbb99bd18f5520a488960170271f2 Mon Sep 17 00:00:00 2001 From: Bin Liu Date: Mon, 21 May 2018 08:42:19 -0500 Subject: usb: musb: disable otg protocol support As decided in the discussion [1] we are deleting the otg protocol support from the musb drivers. First this patch disables the flags for enabling the otg protocols. We will later gradually delete the otg protocol code from the musb drivers. [1] https://www.spinics.net/lists/linux-usb/msg167003.html Signed-off-by: Bin Liu Signed-off-by: Greg Kroah-Hartman --- drivers/usb/musb/musb_gadget.c | 5 +---- drivers/usb/musb/musb_host.c | 3 ++- 2 files changed, 3 insertions(+), 5 deletions(-) (limited to 'drivers/usb') diff --git a/drivers/usb/musb/musb_gadget.c b/drivers/usb/musb/musb_gadget.c index 5b8e629..eae8b1b 100644 --- a/drivers/usb/musb/musb_gadget.c +++ b/drivers/usb/musb/musb_gadget.c @@ -1798,11 +1798,8 @@ int musb_gadget_setup(struct musb *musb) /* this "gadget" abstracts/virtualizes the controller */ musb->g.name = musb_driver_name; -#if IS_ENABLED(CONFIG_USB_MUSB_DUAL_ROLE) - musb->g.is_otg = 1; -#elif IS_ENABLED(CONFIG_USB_MUSB_GADGET) + /* don't support otg protocols */ musb->g.is_otg = 0; -#endif INIT_DELAYED_WORK(&musb->gadget_work, musb_gadget_work); musb_g_init_endpoints(musb); diff --git a/drivers/usb/musb/musb_host.c b/drivers/usb/musb/musb_host.c index cd611a9..8000c7c 100644 --- a/drivers/usb/musb/musb_host.c +++ b/drivers/usb/musb/musb_host.c @@ -2755,7 +2755,8 @@ int musb_host_setup(struct musb *musb, int power_budget) musb->xceiv->otg->state = OTG_STATE_A_IDLE; } otg_set_host(musb->xceiv->otg, &hcd->self); - hcd->self.otg_port = 1; + /* don't support otg protocols */ + hcd->self.otg_port = 0; musb->xceiv->otg->host = &hcd->self; hcd->power_budget = 2 * (power_budget ? : 250); hcd->skip_phy_initialization = 1; -- cgit v1.1 From 49484abd93ab259d5acb1ebf77d3041fe06abbdd Mon Sep 17 00:00:00 2001 From: Johan Hovold Date: Mon, 21 May 2018 08:42:20 -0500 Subject: USB: musb: dsps: propagate device-tree node To be able to use DSPS-based controllers with device-tree descriptions of the USB topology, we need to associate the glue device's device-tree node with the child controller device. Note that this can also be used to eventually let USB core manage generic phys. Also note that the other glue drivers will require similar changes to be able to describe their buses in DT. Signed-off-by: Johan Hovold Signed-off-by: Bin Liu Signed-off-by: Greg Kroah-Hartman --- drivers/usb/musb/musb_dsps.c | 1 + 1 file changed, 1 insertion(+) (limited to 'drivers/usb') diff --git a/drivers/usb/musb/musb_dsps.c b/drivers/usb/musb/musb_dsps.c index 34e4dda..cfe6bfc 100644 --- a/drivers/usb/musb/musb_dsps.c +++ b/drivers/usb/musb/musb_dsps.c @@ -765,6 +765,7 @@ static int dsps_create_musb_pdev(struct dsps_glue *glue, musb->dev.parent = dev; musb->dev.dma_mask = &musb_dmamask; musb->dev.coherent_dma_mask = musb_dmamask; + device_set_of_node_from_dev(&musb->dev, &parent->dev); glue->musb = musb; -- cgit v1.1 From 8dca51071849077e83ec85b7e5d46c84cee227d9 Mon Sep 17 00:00:00 2001 From: Bin Liu Date: Mon, 21 May 2018 08:42:21 -0500 Subject: usb: musb: gadget: fix to_musb_request() to not return NULL The gadget function drivers should ensure the usb_request parameter passed in is not NULL. UDC core doesn't check if it is NULL, so MUSB driver shouldn't have to check it either. Convert to_musb_request() to a simple macro to not directly return NULL to avoid warnings from code static analysis tools. Signed-off-by: Bin Liu Signed-off-by: Greg Kroah-Hartman --- drivers/usb/musb/musb_gadget.h | 5 +---- 1 file changed, 1 insertion(+), 4 deletions(-) (limited to 'drivers/usb') diff --git a/drivers/usb/musb/musb_gadget.h b/drivers/usb/musb/musb_gadget.h index 9c34aca..06d6084 100644 --- a/drivers/usb/musb/musb_gadget.h +++ b/drivers/usb/musb/musb_gadget.h @@ -60,10 +60,7 @@ struct musb_request { enum buffer_map_state map_state; }; -static inline struct musb_request *to_musb_request(struct usb_request *req) -{ - return req ? container_of(req, struct musb_request, request) : NULL; -} +#define to_musb_request(r) container_of((r), struct musb_request, request) extern struct usb_request * musb_alloc_request(struct usb_ep *ep, gfp_t gfp_flags); -- cgit v1.1 From ddf12f04dc5b284133662f81a9c4c46a72d3c6ba Mon Sep 17 00:00:00 2001 From: Bin Liu Date: Mon, 21 May 2018 08:42:22 -0500 Subject: usb: musb: gadget: fix to_musb_ep() to not return NULL UDC core ensures the usb_ep parameter passed in is not NULL, so checking if (ep != NULL) is pointless. Convert to_musb_ep() to a simple macro to not directly return NULL to avoid warnings from code static analysis tools. Signed-off-by: Bin Liu Signed-off-by: Greg Kroah-Hartman --- drivers/usb/musb/musb_gadget.h | 5 +---- 1 file changed, 1 insertion(+), 4 deletions(-) (limited to 'drivers/usb') diff --git a/drivers/usb/musb/musb_gadget.h b/drivers/usb/musb/musb_gadget.h index 06d6084..d026636 100644 --- a/drivers/usb/musb/musb_gadget.h +++ b/drivers/usb/musb/musb_gadget.h @@ -96,10 +96,7 @@ struct musb_ep { u8 hb_mult; }; -static inline struct musb_ep *to_musb_ep(struct usb_ep *ep) -{ - return ep ? container_of(ep, struct musb_ep, end_point) : NULL; -} +#define to_musb_ep(ep) container_of((ep), struct musb_ep, end_point) static inline struct musb_request *next_request(struct musb_ep *ep) { -- cgit v1.1 From 4786d2ef45d3f503b656987c0c0ebead27fa6e67 Mon Sep 17 00:00:00 2001 From: Lu Baolu Date: Mon, 21 May 2018 16:39:49 +0300 Subject: usb: xhci: dbc: Add SPDX identifiers to dbc files Update the xhci dbc files with the correct SPDX license identifiers. Fixes: dfba2174dc42 ("usb: xhci: Add DbC support in xHCI driver") Cc: Philippe Ombredanne Signed-off-by: Lu Baolu Reviewed-by: Philippe Ombredanne Signed-off-by: Mathias Nyman Signed-off-by: Greg Kroah-Hartman --- drivers/usb/host/xhci-dbgcap.c | 1 + drivers/usb/host/xhci-dbgcap.h | 2 +- drivers/usb/host/xhci-dbgtty.c | 1 + 3 files changed, 3 insertions(+), 1 deletion(-) (limited to 'drivers/usb') diff --git a/drivers/usb/host/xhci-dbgcap.c b/drivers/usb/host/xhci-dbgcap.c index c359bae..1fbfd89 100644 --- a/drivers/usb/host/xhci-dbgcap.c +++ b/drivers/usb/host/xhci-dbgcap.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0 /** * xhci-dbgcap.c - xHCI debug capability support * diff --git a/drivers/usb/host/xhci-dbgcap.h b/drivers/usb/host/xhci-dbgcap.h index e66ea07..ce0c607 100644 --- a/drivers/usb/host/xhci-dbgcap.h +++ b/drivers/usb/host/xhci-dbgcap.h @@ -1,4 +1,4 @@ - +/* SPDX-License-Identifier: GPL-2.0 */ /** * xhci-dbgcap.h - xHCI debug capability support * diff --git a/drivers/usb/host/xhci-dbgtty.c b/drivers/usb/host/xhci-dbgtty.c index eb494ec5..aff79ff 100644 --- a/drivers/usb/host/xhci-dbgtty.c +++ b/drivers/usb/host/xhci-dbgtty.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0 /** * xhci-dbgtty.c - tty glue for xHCI debug capability * -- cgit v1.1 From c508f41da07882602d7eda9268febbefc095695a Mon Sep 17 00:00:00 2001 From: Jianguo Sun Date: Mon, 21 May 2018 16:39:51 +0300 Subject: xhci: hisilicon: support HiSilicon STB xHCI host controller This commit adds support for HiSilicon STB xHCI host controller. There are two xHCI host controllers on HiSilicon STB SoCs. Each one requires additional configuration before exposing interface compliant with xHCI. Reviewed-by: Chunfeng Yun Signed-off-by: Jianguo Sun Signed-off-by: Mathias Nyman Signed-off-by: Greg Kroah-Hartman --- drivers/usb/host/Kconfig | 7 + drivers/usb/host/Makefile | 1 + drivers/usb/host/xhci-histb.c | 410 ++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 418 insertions(+) create mode 100644 drivers/usb/host/xhci-histb.c (limited to 'drivers/usb') diff --git a/drivers/usb/host/Kconfig b/drivers/usb/host/Kconfig index 9f0aeb0..6e64d3a 100644 --- a/drivers/usb/host/Kconfig +++ b/drivers/usb/host/Kconfig @@ -52,6 +52,13 @@ config USB_XHCI_PLATFORM If unsure, say N. +config USB_XHCI_HISTB + tristate "xHCI support for HiSilicon STB SoCs" + depends on USB_XHCI_PLATFORM && (ARCH_HISI || COMPILE_TEST) + help + Say 'Y' to enable the support for the xHCI host controller + found in HiSilicon STB SoCs. + config USB_XHCI_MTK tristate "xHCI support for MediaTek SoCs" select MFD_SYSCON diff --git a/drivers/usb/host/Makefile b/drivers/usb/host/Makefile index 8a8cffe..9b669c9 100644 --- a/drivers/usb/host/Makefile +++ b/drivers/usb/host/Makefile @@ -74,6 +74,7 @@ obj-$(CONFIG_USB_FHCI_HCD) += fhci.o obj-$(CONFIG_USB_XHCI_HCD) += xhci-hcd.o obj-$(CONFIG_USB_XHCI_PCI) += xhci-pci.o obj-$(CONFIG_USB_XHCI_PLATFORM) += xhci-plat-hcd.o +obj-$(CONFIG_USB_XHCI_HISTB) += xhci-histb.o obj-$(CONFIG_USB_XHCI_MTK) += xhci-mtk.o obj-$(CONFIG_USB_XHCI_TEGRA) += xhci-tegra.o obj-$(CONFIG_USB_SL811_HCD) += sl811-hcd.o diff --git a/drivers/usb/host/xhci-histb.c b/drivers/usb/host/xhci-histb.c new file mode 100644 index 0000000..27f0016 --- /dev/null +++ b/drivers/usb/host/xhci-histb.c @@ -0,0 +1,410 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * xHCI host controller driver for HiSilicon STB SoCs + * + * Copyright (C) 2017-2018 HiSilicon Co., Ltd. http://www.hisilicon.com + * + * Authors: Jianguo Sun + */ + +#include +#include +#include +#include +#include +#include +#include +#include + +#include "xhci.h" + +#define GTXTHRCFG 0xc108 +#define GRXTHRCFG 0xc10c +#define REG_GUSB2PHYCFG0 0xc200 +#define BIT_UTMI_8_16 BIT(3) +#define BIT_UTMI_ULPI BIT(4) +#define BIT_FREECLK_EXIST BIT(30) + +#define REG_GUSB3PIPECTL0 0xc2c0 +#define USB3_DEEMPHASIS_MASK GENMASK(2, 1) +#define USB3_DEEMPHASIS0 BIT(1) +#define USB3_TX_MARGIN1 BIT(4) + +struct xhci_hcd_histb { + struct device *dev; + struct usb_hcd *hcd; + void __iomem *ctrl; + struct clk *bus_clk; + struct clk *utmi_clk; + struct clk *pipe_clk; + struct clk *suspend_clk; + struct reset_control *soft_reset; +}; + +static inline struct xhci_hcd_histb *hcd_to_histb(struct usb_hcd *hcd) +{ + return dev_get_drvdata(hcd->self.controller); +} + +static int xhci_histb_config(struct xhci_hcd_histb *histb) +{ + struct device_node *np = histb->dev->of_node; + u32 regval; + + if (of_property_match_string(np, "phys-names", "inno") >= 0) { + /* USB2 PHY chose ulpi 8bit interface */ + regval = readl(histb->ctrl + REG_GUSB2PHYCFG0); + regval &= ~BIT_UTMI_ULPI; + regval &= ~(BIT_UTMI_8_16); + regval &= ~BIT_FREECLK_EXIST; + writel(regval, histb->ctrl + REG_GUSB2PHYCFG0); + } + + if (of_property_match_string(np, "phys-names", "combo") >= 0) { + /* + * write 0x010c0012 to GUSB3PIPECTL0 + * GUSB3PIPECTL0[5:3] = 010 : Tx Margin = 900mV , + * decrease TX voltage + * GUSB3PIPECTL0[2:1] = 01 : Tx Deemphasis = -3.5dB, + * refer to xHCI spec + */ + regval = readl(histb->ctrl + REG_GUSB3PIPECTL0); + regval &= ~USB3_DEEMPHASIS_MASK; + regval |= USB3_DEEMPHASIS0; + regval |= USB3_TX_MARGIN1; + writel(regval, histb->ctrl + REG_GUSB3PIPECTL0); + } + + writel(0x23100000, histb->ctrl + GTXTHRCFG); + writel(0x23100000, histb->ctrl + GRXTHRCFG); + + return 0; +} + +static int xhci_histb_clks_get(struct xhci_hcd_histb *histb) +{ + struct device *dev = histb->dev; + + histb->bus_clk = devm_clk_get(dev, "bus"); + if (IS_ERR(histb->bus_clk)) { + dev_err(dev, "fail to get bus clk\n"); + return PTR_ERR(histb->bus_clk); + } + + histb->utmi_clk = devm_clk_get(dev, "utmi"); + if (IS_ERR(histb->utmi_clk)) { + dev_err(dev, "fail to get utmi clk\n"); + return PTR_ERR(histb->utmi_clk); + } + + histb->pipe_clk = devm_clk_get(dev, "pipe"); + if (IS_ERR(histb->pipe_clk)) { + dev_err(dev, "fail to get pipe clk\n"); + return PTR_ERR(histb->pipe_clk); + } + + histb->suspend_clk = devm_clk_get(dev, "suspend"); + if (IS_ERR(histb->suspend_clk)) { + dev_err(dev, "fail to get suspend clk\n"); + return PTR_ERR(histb->suspend_clk); + } + + return 0; +} + +static int xhci_histb_host_enable(struct xhci_hcd_histb *histb) +{ + int ret; + + ret = clk_prepare_enable(histb->bus_clk); + if (ret) { + dev_err(histb->dev, "failed to enable bus clk\n"); + return ret; + } + + ret = clk_prepare_enable(histb->utmi_clk); + if (ret) { + dev_err(histb->dev, "failed to enable utmi clk\n"); + goto err_utmi_clk; + } + + ret = clk_prepare_enable(histb->pipe_clk); + if (ret) { + dev_err(histb->dev, "failed to enable pipe clk\n"); + goto err_pipe_clk; + } + + ret = clk_prepare_enable(histb->suspend_clk); + if (ret) { + dev_err(histb->dev, "failed to enable suspend clk\n"); + goto err_suspend_clk; + } + + reset_control_deassert(histb->soft_reset); + + return 0; + +err_suspend_clk: + clk_disable_unprepare(histb->pipe_clk); +err_pipe_clk: + clk_disable_unprepare(histb->utmi_clk); +err_utmi_clk: + clk_disable_unprepare(histb->bus_clk); + + return ret; +} + +static void xhci_histb_host_disable(struct xhci_hcd_histb *histb) +{ + reset_control_assert(histb->soft_reset); + + clk_disable_unprepare(histb->suspend_clk); + clk_disable_unprepare(histb->pipe_clk); + clk_disable_unprepare(histb->utmi_clk); + clk_disable_unprepare(histb->bus_clk); +} + +static void xhci_histb_quirks(struct device *dev, struct xhci_hcd *xhci) +{ + /* + * As of now platform drivers don't provide MSI support so we ensure + * here that the generic code does not try to make a pci_dev from our + * dev struct in order to setup MSI + */ + xhci->quirks |= XHCI_PLAT; +} + +/* called during probe() after chip reset completes */ +static int xhci_histb_setup(struct usb_hcd *hcd) +{ + struct xhci_hcd_histb *histb = hcd_to_histb(hcd); + int ret; + + if (usb_hcd_is_primary_hcd(hcd)) { + ret = xhci_histb_config(histb); + if (ret) + return ret; + } + + return xhci_gen_setup(hcd, xhci_histb_quirks); +} + +static const struct xhci_driver_overrides xhci_histb_overrides __initconst = { + .reset = xhci_histb_setup, +}; + +static struct hc_driver __read_mostly xhci_histb_hc_driver; +static int xhci_histb_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct xhci_hcd_histb *histb; + const struct hc_driver *driver; + struct usb_hcd *hcd; + struct xhci_hcd *xhci; + struct resource *res; + int irq; + int ret = -ENODEV; + + if (usb_disabled()) + return -ENODEV; + + driver = &xhci_histb_hc_driver; + histb = devm_kzalloc(dev, sizeof(*histb), GFP_KERNEL); + if (!histb) + return -ENOMEM; + + histb->dev = dev; + + irq = platform_get_irq(pdev, 0); + if (irq < 0) + return irq; + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + histb->ctrl = devm_ioremap_resource(&pdev->dev, res); + if (IS_ERR(histb->ctrl)) + return PTR_ERR(histb->ctrl); + + ret = xhci_histb_clks_get(histb); + if (ret) + return ret; + + histb->soft_reset = devm_reset_control_get(dev, "soft"); + if (IS_ERR(histb->soft_reset)) { + dev_err(dev, "failed to get soft reset\n"); + return PTR_ERR(histb->soft_reset); + } + + pm_runtime_enable(dev); + pm_runtime_get_sync(dev); + device_enable_async_suspend(dev); + + /* Initialize dma_mask and coherent_dma_mask to 32-bits */ + ret = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(32)); + if (ret) + return ret; + + hcd = usb_create_hcd(driver, dev, dev_name(dev)); + if (!hcd) { + ret = -ENOMEM; + goto disable_pm; + } + + hcd->regs = histb->ctrl; + hcd->rsrc_start = res->start; + hcd->rsrc_len = resource_size(res); + + histb->hcd = hcd; + dev_set_drvdata(hcd->self.controller, histb); + + ret = xhci_histb_host_enable(histb); + if (ret) + goto put_hcd; + + xhci = hcd_to_xhci(hcd); + + device_wakeup_enable(hcd->self.controller); + + xhci->main_hcd = hcd; + xhci->shared_hcd = usb_create_shared_hcd(driver, dev, dev_name(dev), + hcd); + if (!xhci->shared_hcd) { + ret = -ENOMEM; + goto disable_host; + } + + if (device_property_read_bool(dev, "usb2-lpm-disable")) + xhci->quirks |= XHCI_HW_LPM_DISABLE; + + if (device_property_read_bool(dev, "usb3-lpm-capable")) + xhci->quirks |= XHCI_LPM_SUPPORT; + + /* imod_interval is the interrupt moderation value in nanoseconds. */ + xhci->imod_interval = 40000; + device_property_read_u32(dev, "imod-interval-ns", + &xhci->imod_interval); + + ret = usb_add_hcd(hcd, irq, IRQF_SHARED); + if (ret) + goto put_usb3_hcd; + + if (HCC_MAX_PSA(xhci->hcc_params) >= 4) + xhci->shared_hcd->can_do_streams = 1; + + ret = usb_add_hcd(xhci->shared_hcd, irq, IRQF_SHARED); + if (ret) + goto dealloc_usb2_hcd; + + device_enable_async_suspend(dev); + pm_runtime_put_noidle(dev); + + /* + * Prevent runtime pm from being on as default, users should enable + * runtime pm using power/control in sysfs. + */ + pm_runtime_forbid(dev); + + return 0; + +dealloc_usb2_hcd: + usb_remove_hcd(hcd); +put_usb3_hcd: + usb_put_hcd(xhci->shared_hcd); +disable_host: + xhci_histb_host_disable(histb); +put_hcd: + usb_put_hcd(hcd); +disable_pm: + pm_runtime_put_sync(dev); + pm_runtime_disable(dev); + + return ret; +} + +static int xhci_histb_remove(struct platform_device *dev) +{ + struct xhci_hcd_histb *histb = platform_get_drvdata(dev); + struct usb_hcd *hcd = histb->hcd; + struct xhci_hcd *xhci = hcd_to_xhci(hcd); + + xhci->xhc_state |= XHCI_STATE_REMOVING; + + usb_remove_hcd(xhci->shared_hcd); + device_wakeup_disable(&dev->dev); + + usb_remove_hcd(hcd); + usb_put_hcd(xhci->shared_hcd); + + xhci_histb_host_disable(histb); + usb_put_hcd(hcd); + pm_runtime_put_sync(&dev->dev); + pm_runtime_disable(&dev->dev); + + return 0; +} + +static int __maybe_unused xhci_histb_suspend(struct device *dev) +{ + struct xhci_hcd_histb *histb = dev_get_drvdata(dev); + struct usb_hcd *hcd = histb->hcd; + struct xhci_hcd *xhci = hcd_to_xhci(hcd); + int ret; + + ret = xhci_suspend(xhci, device_may_wakeup(dev)); + + if (!device_may_wakeup(dev)) + xhci_histb_host_disable(histb); + + return ret; +} + +static int __maybe_unused xhci_histb_resume(struct device *dev) +{ + struct xhci_hcd_histb *histb = dev_get_drvdata(dev); + struct usb_hcd *hcd = histb->hcd; + struct xhci_hcd *xhci = hcd_to_xhci(hcd); + + if (!device_may_wakeup(dev)) + xhci_histb_host_enable(histb); + + return xhci_resume(xhci, 0); +} + +static const struct dev_pm_ops xhci_histb_pm_ops = { + SET_SYSTEM_SLEEP_PM_OPS(xhci_histb_suspend, xhci_histb_resume) +}; +#define DEV_PM_OPS (IS_ENABLED(CONFIG_PM) ? &xhci_histb_pm_ops : NULL) + +#ifdef CONFIG_OF +static const struct of_device_id histb_xhci_of_match[] = { + { .compatible = "hisilicon,hi3798cv200-xhci"}, + { }, +}; +MODULE_DEVICE_TABLE(of, histb_xhci_of_match); +#endif + +static struct platform_driver histb_xhci_driver = { + .probe = xhci_histb_probe, + .remove = xhci_histb_remove, + .driver = { + .name = "xhci-histb", + .pm = DEV_PM_OPS, + .of_match_table = of_match_ptr(histb_xhci_of_match), + }, +}; +MODULE_ALIAS("platform:xhci-histb"); + +static int __init xhci_histb_init(void) +{ + xhci_init_driver(&xhci_histb_hc_driver, &xhci_histb_overrides); + return platform_driver_register(&histb_xhci_driver); +} +module_init(xhci_histb_init); + +static void __exit xhci_histb_exit(void) +{ + platform_driver_unregister(&histb_xhci_driver); +} +module_exit(xhci_histb_exit); + +MODULE_DESCRIPTION("HiSilicon STB xHCI Host Controller Driver"); +MODULE_LICENSE("GPL v2"); -- cgit v1.1 From bcaa9d5c59005eceed5f2112c13240401f0fb93b Mon Sep 17 00:00:00 2001 From: Mathias Nyman Date: Mon, 21 May 2018 16:39:52 +0300 Subject: xhci: Create new structures to store xhci port information Current way of having one array telling only the port speed, and then two separate arrays with mmio addresses for usb2 and usb3 ports requeres helper functions to transate hw to hcd, and hcd to hw port numbers, and is hard to expand. Instead create a structure describing a port, including the mmio address, the port hardware index, hcd port index, and a pointer to the roothub it belongs to. Create one array containing all port structures in the same order the hardware controller sees them. Then add an array of port pointers to each xhci hub structure pointing to the ports that belonging to the roothub. This way we can easily convert hw indexed port events to usb core hcd port numbers, and vice versa usb core hub hcd port numbers to hw index and mmio address. Other benefit is that we can easily find the parent hcd and xhci structure of a port structure. This is useful in debugfs where we can give one port structure pointer as parameter and get both the correct mmio address and xhci lock needed to set some port parameter. Signed-off-by: Mathias Nyman Signed-off-by: Greg Kroah-Hartman --- drivers/usb/host/xhci-mem.c | 58 ++++++++++++++++++++++++++++++++++++++++++++- drivers/usb/host/xhci.h | 21 ++++++++++++---- 2 files changed, 73 insertions(+), 6 deletions(-) (limited to 'drivers/usb') diff --git a/drivers/usb/host/xhci-mem.c b/drivers/usb/host/xhci-mem.c index e5ace89..8819286 100644 --- a/drivers/usb/host/xhci-mem.c +++ b/drivers/usb/host/xhci-mem.c @@ -1892,16 +1892,24 @@ no_bw: xhci->cmd_ring_reserved_trbs = 0; xhci->num_usb2_ports = 0; xhci->num_usb3_ports = 0; + xhci->usb2_rhub.num_ports = 0; + xhci->usb3_rhub.num_ports = 0; xhci->num_active_eps = 0; kfree(xhci->usb2_ports); kfree(xhci->usb3_ports); kfree(xhci->port_array); + kfree(xhci->usb2_rhub.ports); + kfree(xhci->usb3_rhub.ports); + kfree(xhci->hw_ports); kfree(xhci->rh_bw); kfree(xhci->ext_caps); xhci->usb2_ports = NULL; xhci->usb3_ports = NULL; xhci->port_array = NULL; + xhci->usb2_rhub.ports = NULL; + xhci->usb3_rhub.ports = NULL; + xhci->hw_ports = NULL; xhci->rh_bw = NULL; xhci->ext_caps = NULL; @@ -2186,8 +2194,10 @@ static void xhci_add_in_port(struct xhci_hcd *xhci, unsigned int num_ports, port_offset--; for (i = port_offset; i < (port_offset + port_count); i++) { + struct xhci_port *hw_port = &xhci->hw_ports[i]; /* Duplicate entry. Ignore the port if the revisions differ. */ - if (xhci->port_array[i] != 0) { + if (xhci->port_array[i] != 0 || + hw_port->rhub) { xhci_warn(xhci, "Duplicate port entry, Ext Cap %p," " port %u\n", addr, i); xhci_warn(xhci, "Port was marked as USB %u, " @@ -2205,9 +2215,16 @@ static void xhci_add_in_port(struct xhci_hcd *xhci, unsigned int num_ports, xhci->port_array[i] = DUPLICATE_ENTRY; } /* FIXME: Should we disable the port? */ + if (hw_port->rhub != rhub && + hw_port->hcd_portnum != DUPLICATE_ENTRY) { + hw_port->rhub->num_ports--; + hw_port->hcd_portnum = DUPLICATE_ENTRY; + } continue; } xhci->port_array[i] = major_revision; + hw_port->rhub = rhub; + rhub->num_ports++; if (major_revision == 0x03) xhci->num_usb3_ports++; else @@ -2216,6 +2233,27 @@ static void xhci_add_in_port(struct xhci_hcd *xhci, unsigned int num_ports, /* FIXME: Should we disable ports not in the Extended Capabilities? */ } +static void xhci_create_rhub_port_array(struct xhci_hcd *xhci, + struct xhci_hub *rhub, gfp_t flags) +{ + int port_index = 0; + int i; + + if (!rhub->num_ports) + return; + rhub->ports = kcalloc(rhub->num_ports, sizeof(rhub->ports), flags); + for (i = 0; i < HCS_MAX_PORTS(xhci->hcs_params1); i++) { + if (xhci->hw_ports[i].rhub != rhub || + xhci->hw_ports[i].hcd_portnum == DUPLICATE_ENTRY) + continue; + xhci->hw_ports[i].hcd_portnum = port_index; + rhub->ports[port_index] = &xhci->hw_ports[i]; + port_index++; + if (port_index == rhub->num_ports) + break; + } +} + /* * Scan the Extended Capabilities for the "Supported Protocol Capabilities" that * specify what speeds each port is supposed to be. We can't count on the port @@ -2234,9 +2272,16 @@ static int xhci_setup_port_arrays(struct xhci_hcd *xhci, gfp_t flags) num_ports = HCS_MAX_PORTS(xhci->hcs_params1); xhci->port_array = kzalloc(sizeof(*xhci->port_array)*num_ports, flags); + xhci->hw_ports = kcalloc(num_ports, sizeof(*xhci->hw_ports), flags); if (!xhci->port_array) return -ENOMEM; + for (i = 0; i < num_ports; i++) { + xhci->hw_ports[i].addr = &xhci->op_regs->port_status_base + + NUM_PORT_REGS * i; + xhci->hw_ports[i].hw_portnum = i; + } + xhci->rh_bw = kzalloc(sizeof(*xhci->rh_bw)*num_ports, flags); if (!xhci->rh_bw) return -ENOMEM; @@ -2274,6 +2319,9 @@ static int xhci_setup_port_arrays(struct xhci_hcd *xhci, gfp_t flags) xhci_add_in_port(xhci, num_ports, base + offset, cap_count); if (xhci->num_usb2_ports + xhci->num_usb3_ports == num_ports) break; + if (xhci->usb2_rhub.num_ports + xhci->usb3_rhub.num_ports == + num_ports) + break; offset = xhci_find_next_ext_cap(base, offset, XHCI_EXT_CAPS_PROTOCOL); } @@ -2282,6 +2330,10 @@ static int xhci_setup_port_arrays(struct xhci_hcd *xhci, gfp_t flags) xhci_warn(xhci, "No ports on the roothubs?\n"); return -ENODEV; } + if (xhci->usb2_rhub.num_ports == 0 && xhci->usb3_rhub.num_ports == 0) { + xhci_warn(xhci, "No ports on the roothubs?\n"); + return -ENODEV; + } xhci_dbg_trace(xhci, trace_xhci_dbg_init, "Found %u USB 2.0 ports and %u USB 3.0 ports.", xhci->num_usb2_ports, xhci->num_usb3_ports); @@ -2306,6 +2358,10 @@ static int xhci_setup_port_arrays(struct xhci_hcd *xhci, gfp_t flags) * Note we could have all USB 3.0 ports, or all USB 2.0 ports. * Not sure how the USB core will handle a hub with no ports... */ + + xhci_create_rhub_port_array(xhci, &xhci->usb2_rhub, flags); + xhci_create_rhub_port_array(xhci, &xhci->usb3_rhub, flags); + if (xhci->num_usb2_ports) { xhci->usb2_ports = kmalloc(sizeof(*xhci->usb2_ports)* xhci->num_usb2_ports, flags); diff --git a/drivers/usb/host/xhci.h b/drivers/usb/host/xhci.h index 6dfc486..38aa8a6 100644 --- a/drivers/usb/host/xhci.h +++ b/drivers/usb/host/xhci.h @@ -1683,13 +1683,23 @@ static inline unsigned int hcd_index(struct usb_hcd *hcd) else return 1; } +struct xhci_port { + __le32 __iomem *addr; + int hw_portnum; + int hcd_portnum; + struct xhci_hub *rhub; +}; struct xhci_hub { - u8 maj_rev; - u8 min_rev; - u32 *psi; /* array of protocol speed ID entries */ - u8 psi_count; - u8 psi_uid_count; + struct xhci_port **ports; + unsigned int num_ports; + struct usb_hcd *hcd; + /* supported prococol extended capabiliy values */ + u8 maj_rev; + u8 min_rev; + u32 *psi; /* array of protocol speed ID entries */ + u8 psi_count; + u8 psi_uid_count; }; /* There is one xhci_hcd structure per controller */ @@ -1838,6 +1848,7 @@ struct xhci_hcd { struct xhci_bus_state bus_state[2]; /* Is each xHCI roothub port a USB 3.0, USB 2.0, or USB 1.1 port? */ u8 *port_array; + struct xhci_port *hw_ports; /* Array of pointers to USB 3.0 PORTSC registers */ __le32 __iomem **usb3_ports; unsigned int num_usb3_ports; -- cgit v1.1 From 9ea95ecc7ffd338a62972ddd6b0ac46bdc5e7d49 Mon Sep 17 00:00:00 2001 From: Mathias Nyman Date: Mon, 21 May 2018 16:39:53 +0300 Subject: xhci: set hcd pointers for xhci usb2 and usb3 roothub structures Allows us to know the correct hcd a xhci roothub and its ports belong to. Signed-off-by: Mathias Nyman Signed-off-by: Greg Kroah-Hartman --- drivers/usb/host/xhci.c | 2 ++ 1 file changed, 2 insertions(+) (limited to 'drivers/usb') diff --git a/drivers/usb/host/xhci.c b/drivers/usb/host/xhci.c index 711da33..f614ba1 100644 --- a/drivers/usb/host/xhci.c +++ b/drivers/usb/host/xhci.c @@ -4858,6 +4858,7 @@ int xhci_gen_setup(struct usb_hcd *hcd, xhci_get_quirks_t get_quirks) if (usb_hcd_is_primary_hcd(hcd)) { xhci->main_hcd = hcd; + xhci->usb2_rhub.hcd = hcd; /* Mark the first roothub as being USB 2.0. * The xHCI driver will register the USB 3.0 roothub. */ @@ -4883,6 +4884,7 @@ int xhci_gen_setup(struct usb_hcd *hcd, xhci_get_quirks_t get_quirks) minor_rev, minor_rev ? "Enhanced" : ""); + xhci->usb3_rhub.hcd = hcd; /* xHCI private pointer was set in xhci_pci_probe for the second * registered roothub. */ -- cgit v1.1 From ffd4b4fc0b9a1526b64240676d309506b2d5eceb Mon Sep 17 00:00:00 2001 From: Mathias Nyman Date: Mon, 21 May 2018 16:39:54 +0300 Subject: xhci: Add helper to get xhci roothub from hcd quick way to get the xhci roothub and thus all the ports belonging to a certain hcd Signed-off-by: Mathias Nyman Signed-off-by: Greg Kroah-Hartman --- drivers/usb/host/xhci-hub.c | 9 +++++++++ drivers/usb/host/xhci.h | 2 ++ 2 files changed, 11 insertions(+) (limited to 'drivers/usb') diff --git a/drivers/usb/host/xhci-hub.c b/drivers/usb/host/xhci-hub.c index 32cd52c..b6fd26f 100644 --- a/drivers/usb/host/xhci-hub.c +++ b/drivers/usb/host/xhci-hub.c @@ -554,6 +554,15 @@ static int xhci_get_ports(struct usb_hcd *hcd, __le32 __iomem ***port_array) return max_ports; } +struct xhci_hub *xhci_get_rhub(struct usb_hcd *hcd) +{ + struct xhci_hcd *xhci = hcd_to_xhci(hcd); + + if (hcd->speed >= HCD_USB3) + return &xhci->usb3_rhub; + return &xhci->usb2_rhub; +} + static __le32 __iomem *xhci_get_port_io_addr(struct usb_hcd *hcd, int index) { __le32 __iomem **port_array; diff --git a/drivers/usb/host/xhci.h b/drivers/usb/host/xhci.h index 38aa8a6..cdf8e1a 100644 --- a/drivers/usb/host/xhci.h +++ b/drivers/usb/host/xhci.h @@ -2110,6 +2110,8 @@ int xhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue, u16 wIndex, char *buf, u16 wLength); int xhci_hub_status_data(struct usb_hcd *hcd, char *buf); int xhci_find_raw_port_number(struct usb_hcd *hcd, int port1); +struct xhci_hub *xhci_get_rhub(struct usb_hcd *hcd); + void xhci_hc_died(struct xhci_hcd *xhci); #ifdef CONFIG_PM -- cgit v1.1 From e740b019d7c6b4de38f57a26d4cf1b15125bdcbf Mon Sep 17 00:00:00 2001 From: Mathias Nyman Date: Mon, 21 May 2018 16:39:55 +0300 Subject: xhci: xhci-hub: use new port structures to get port address instead of port array Use the new port structures for functions in xhci-hub.c to get port mmio address of portsc register instead of the port array xhci_get_port_io_addr() is no longer needeed and is removed. Plan is to get rid of the mmio port array completely. Signed-off-by: Mathias Nyman Signed-off-by: Greg Kroah-Hartman --- drivers/usb/host/xhci-hub.c | 140 ++++++++++++++++++++++++-------------------- 1 file changed, 78 insertions(+), 62 deletions(-) (limited to 'drivers/usb') diff --git a/drivers/usb/host/xhci-hub.c b/drivers/usb/host/xhci-hub.c index b6fd26f..0796f08 100644 --- a/drivers/usb/host/xhci-hub.c +++ b/drivers/usb/host/xhci-hub.c @@ -189,9 +189,10 @@ static void xhci_usb2_hub_descriptor(struct usb_hcd *hcd, struct xhci_hcd *xhci, __u8 port_removable[(USB_MAXCHILDREN + 1 + 7) / 8]; u32 portsc; unsigned int i; + struct xhci_hub *rhub; - ports = xhci->num_usb2_ports; - + rhub = &xhci->usb2_rhub; + ports = rhub->num_ports; xhci_common_hub_descriptor(xhci, desc, ports); desc->bDescriptorType = USB_DT_HUB; temp = 1 + (ports / 8); @@ -202,7 +203,7 @@ static void xhci_usb2_hub_descriptor(struct usb_hcd *hcd, struct xhci_hcd *xhci, */ memset(port_removable, 0, sizeof(port_removable)); for (i = 0; i < ports; i++) { - portsc = readl(xhci->usb2_ports[i]); + portsc = readl(rhub->ports[i]->addr); /* If a device is removable, PORTSC reports a 0, same as in the * hub descriptor DeviceRemovable bits. */ @@ -241,8 +242,10 @@ static void xhci_usb3_hub_descriptor(struct usb_hcd *hcd, struct xhci_hcd *xhci, u16 port_removable; u32 portsc; unsigned int i; + struct xhci_hub *rhub; - ports = xhci->num_usb3_ports; + rhub = &xhci->usb3_rhub; + ports = rhub->num_ports; xhci_common_hub_descriptor(xhci, desc, ports); desc->bDescriptorType = USB_DT_SS_HUB; desc->bDescLength = USB_DT_SS_HUB_SIZE; @@ -256,7 +259,7 @@ static void xhci_usb3_hub_descriptor(struct usb_hcd *hcd, struct xhci_hcd *xhci, port_removable = 0; /* bit 0 is reserved, bit 1 is for port 1, etc. */ for (i = 0; i < ports; i++) { - portsc = readl(xhci->usb3_ports[i]); + portsc = readl(rhub->ports[i]->addr); if (portsc & PORT_DEV_REMOVE) port_removable |= 1 << (i + 1); } @@ -563,14 +566,6 @@ struct xhci_hub *xhci_get_rhub(struct usb_hcd *hcd) return &xhci->usb2_rhub; } -static __le32 __iomem *xhci_get_port_io_addr(struct usb_hcd *hcd, int index) -{ - __le32 __iomem **port_array; - - xhci_get_ports(hcd, &port_array); - return port_array[index]; -} - /* * xhci_set_port_power() must be called with xhci->lock held. * It will release and re-aquire the lock while calling ACPI @@ -579,21 +574,23 @@ static __le32 __iomem *xhci_get_port_io_addr(struct usb_hcd *hcd, int index) static void xhci_set_port_power(struct xhci_hcd *xhci, struct usb_hcd *hcd, u16 index, bool on, unsigned long *flags) { - __le32 __iomem *addr; + struct xhci_hub *rhub; + struct xhci_port *port; u32 temp; - addr = xhci_get_port_io_addr(hcd, index); - temp = readl(addr); + rhub = xhci_get_rhub(hcd); + port = rhub->ports[index]; + temp = readl(port->addr); temp = xhci_port_state_to_neutral(temp); if (on) { /* Power on */ - writel(temp | PORT_POWER, addr); - temp = readl(addr); + writel(temp | PORT_POWER, port->addr); + temp = readl(port->addr); xhci_dbg(xhci, "set port power, actual port %d status = 0x%x\n", index, temp); } else { /* Power off */ - writel(temp & ~PORT_POWER, addr); + writel(temp & ~PORT_POWER, port->addr); } spin_unlock_irqrestore(&xhci->lock, *flags); @@ -609,13 +606,13 @@ static void xhci_port_set_test_mode(struct xhci_hcd *xhci, u16 test_mode, u16 wIndex) { u32 temp; - __le32 __iomem *addr; + struct xhci_port *port; - /* xhci only supports test mode for usb2 ports, i.e. xhci->main_hcd */ - addr = xhci_get_port_io_addr(xhci->main_hcd, wIndex); - temp = readl(addr + PORTPMSC); + /* xhci only supports test mode for usb2 ports */ + port = xhci->usb2_rhub.ports[wIndex]; + temp = readl(port->addr + PORTPMSC); temp |= test_mode << PORT_TEST_MODE_SHIFT; - writel(temp, addr + PORTPMSC); + writel(temp, port->addr + PORTPMSC); xhci->test_mode = test_mode; if (test_mode == TEST_FORCE_EN) xhci_start(xhci); @@ -642,10 +639,10 @@ static int xhci_enter_test_mode(struct xhci_hcd *xhci, /* Put all ports to the Disable state by clear PP */ xhci_dbg(xhci, "Disable all port (PP = 0)\n"); /* Power off USB3 ports*/ - for (i = 0; i < xhci->num_usb3_ports; i++) + for (i = 0; i < xhci->usb3_rhub.num_ports; i++) xhci_set_port_power(xhci, xhci->shared_hcd, i, false, flags); /* Power off USB2 ports*/ - for (i = 0; i < xhci->num_usb2_ports; i++) + for (i = 0; i < xhci->usb2_rhub.num_ports; i++) xhci_set_port_power(xhci, xhci->main_hcd, i, false, flags); /* Stop the controller */ xhci_dbg(xhci, "Stop controller\n"); @@ -803,7 +800,7 @@ static void xhci_hub_report_usb3_link_state(struct xhci_hcd *xhci, static void xhci_del_comp_mod_timer(struct xhci_hcd *xhci, u32 status, u16 wIndex) { - u32 all_ports_seen_u0 = ((1 << xhci->num_usb3_ports)-1); + u32 all_ports_seen_u0 = ((1 << xhci->usb3_rhub.num_ports) - 1); bool port_in_u0 = ((status & PORT_PLS_MASK) == XDEV_U0); if (!(xhci->quirks & XHCI_COMP_MODE_QUIRK)) @@ -858,6 +855,11 @@ static u32 xhci_get_port_status(struct usb_hcd *hcd, struct xhci_hcd *xhci = hcd_to_xhci(hcd); u32 status = 0; int slot_id; + struct xhci_hub *rhub; + struct xhci_port *port; + + rhub = xhci_get_rhub(hcd); + port = rhub->ports[wIndex]; /* wPortChange bits */ if (raw_port_status & PORT_CSC) @@ -949,7 +951,7 @@ static u32 xhci_get_port_status(struct usb_hcd *hcd, } xhci_ring_device(xhci, slot_id); } else { - int port_status = readl(port_array[wIndex]); + int port_status = readl(port->addr); xhci_warn(xhci, "Port resume took longer than %i msec, port status = 0x%x\n", XHCI_MAX_REXIT_TIMEOUT, port_status); @@ -1040,7 +1042,11 @@ int xhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue, u16 wake_mask = 0; u16 timeout = 0; u16 test_mode = 0; + struct xhci_hub *rhub; + struct xhci_port **ports; + rhub = xhci_get_rhub(hcd); + ports = rhub->ports; max_ports = xhci_get_ports(hcd, &port_array); bus_state = &xhci->bus_state[hcd_index(hcd)]; @@ -1079,7 +1085,7 @@ int xhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue, if (!wIndex || wIndex > max_ports) goto error; wIndex--; - temp = readl(port_array[wIndex]); + temp = readl(ports[wIndex]->addr); if (temp == ~(u32)0) { xhci_hc_died(xhci); retval = -ENODEV; @@ -1105,7 +1111,7 @@ int xhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue, retval = -EINVAL; break; } - port_li = readl(port_array[wIndex] + PORTLI); + port_li = readl(ports[wIndex]->addr + PORTLI); status = xhci_get_ext_port_status(temp, port_li); put_unaligned_le32(cpu_to_le32(status), &buf[4]); } @@ -1123,7 +1129,7 @@ int xhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue, if (!wIndex || wIndex > max_ports) goto error; wIndex--; - temp = readl(port_array[wIndex]); + temp = readl(ports[wIndex]->addr); if (temp == ~(u32)0) { xhci_hc_died(xhci); retval = -ENODEV; @@ -1133,7 +1139,7 @@ int xhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue, /* FIXME: What new port features do we need to support? */ switch (wValue) { case USB_PORT_FEAT_SUSPEND: - temp = readl(port_array[wIndex]); + temp = readl(ports[wIndex]->addr); if ((temp & PORT_PLS_MASK) != XDEV_U0) { /* Resume the port to U0 first */ xhci_set_link_state(xhci, port_array, wIndex, @@ -1146,7 +1152,7 @@ int xhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue, * a port unless the port reports that it is in the * enabled (PED = ‘1’,PLS < ‘3’) state. */ - temp = readl(port_array[wIndex]); + temp = readl(ports[wIndex]->addr); if ((temp & PORT_PE) == 0 || (temp & PORT_RESET) || (temp & PORT_PLS_MASK) >= XDEV_U3) { xhci_warn(xhci, "USB core suspending device not in U0/U1/U2.\n"); @@ -1170,12 +1176,11 @@ int xhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue, msleep(10); /* wait device to enter */ spin_lock_irqsave(&xhci->lock, flags); - temp = readl(port_array[wIndex]); + temp = readl(ports[wIndex]->addr); bus_state->suspended_ports |= 1 << wIndex; break; case USB_PORT_FEAT_LINK_STATE: - temp = readl(port_array[wIndex]); - + temp = readl(ports[wIndex]->addr); /* Disable port */ if (link_state == USB_SS_PORT_LS_SS_DISABLED) { xhci_dbg(xhci, "Disable port %d\n", wIndex); @@ -1187,8 +1192,8 @@ int xhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue, temp |= PORT_CSC | PORT_PEC | PORT_WRC | PORT_OCC | PORT_RC | PORT_PLC | PORT_CEC; - writel(temp | PORT_PE, port_array[wIndex]); - temp = readl(port_array[wIndex]); + writel(temp | PORT_PE, ports[wIndex]->addr); + temp = readl(ports[wIndex]->addr); break; } @@ -1197,7 +1202,7 @@ int xhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue, xhci_dbg(xhci, "Enable port %d\n", wIndex); xhci_set_link_state(xhci, port_array, wIndex, link_state); - temp = readl(port_array[wIndex]); + temp = readl(ports[wIndex]->addr); break; } @@ -1230,7 +1235,7 @@ int xhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue, wIndex); xhci_set_link_state(xhci, port_array, wIndex, link_state); - temp = readl(port_array[wIndex]); + temp = readl(ports[wIndex]->addr); break; } /* Port must be enabled */ @@ -1264,7 +1269,7 @@ int xhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue, msleep(20); /* wait device to enter */ spin_lock_irqsave(&xhci->lock, flags); - temp = readl(port_array[wIndex]); + temp = readl(ports[wIndex]->addr); if (link_state == USB_SS_PORT_LS_U3) bus_state->suspended_ports |= 1 << wIndex; break; @@ -1279,40 +1284,39 @@ int xhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue, break; case USB_PORT_FEAT_RESET: temp = (temp | PORT_RESET); - writel(temp, port_array[wIndex]); + writel(temp, ports[wIndex]->addr); - temp = readl(port_array[wIndex]); + temp = readl(ports[wIndex]->addr); xhci_dbg(xhci, "set port reset, actual port %d status = 0x%x\n", wIndex, temp); break; case USB_PORT_FEAT_REMOTE_WAKE_MASK: xhci_set_remote_wake_mask(xhci, port_array, wIndex, wake_mask); - temp = readl(port_array[wIndex]); + temp = readl(ports[wIndex]->addr); xhci_dbg(xhci, "set port remote wake mask, " "actual port %d status = 0x%x\n", wIndex, temp); break; case USB_PORT_FEAT_BH_PORT_RESET: temp |= PORT_WR; - writel(temp, port_array[wIndex]); - - temp = readl(port_array[wIndex]); + writel(temp, ports[wIndex]->addr); + temp = readl(ports[wIndex]->addr); break; case USB_PORT_FEAT_U1_TIMEOUT: if (hcd->speed < HCD_USB3) goto error; - temp = readl(port_array[wIndex] + PORTPMSC); + temp = readl(ports[wIndex]->addr + PORTPMSC); temp &= ~PORT_U1_TIMEOUT_MASK; temp |= PORT_U1_TIMEOUT(timeout); - writel(temp, port_array[wIndex] + PORTPMSC); + writel(temp, ports[wIndex]->addr + PORTPMSC); break; case USB_PORT_FEAT_U2_TIMEOUT: if (hcd->speed < HCD_USB3) goto error; - temp = readl(port_array[wIndex] + PORTPMSC); + temp = readl(ports[wIndex]->addr + PORTPMSC); temp &= ~PORT_U2_TIMEOUT_MASK; temp |= PORT_U2_TIMEOUT(timeout); - writel(temp, port_array[wIndex] + PORTPMSC); + writel(temp, ports[wIndex]->addr + PORTPMSC); break; case USB_PORT_FEAT_TEST: /* 4.19.6 Port Test Modes (USB2 Test Mode) */ @@ -1327,13 +1331,13 @@ int xhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue, goto error; } /* unblock any posted writes */ - temp = readl(port_array[wIndex]); + temp = readl(ports[wIndex]->addr); break; case ClearPortFeature: if (!wIndex || wIndex > max_ports) goto error; wIndex--; - temp = readl(port_array[wIndex]); + temp = readl(ports[wIndex]->addr); if (temp == ~(u32)0) { xhci_hc_died(xhci); retval = -ENODEV; @@ -1343,7 +1347,7 @@ int xhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue, temp = xhci_port_state_to_neutral(temp); switch (wValue) { case USB_PORT_FEAT_SUSPEND: - temp = readl(port_array[wIndex]); + temp = readl(ports[wIndex]->addr); xhci_dbg(xhci, "clear USB_PORT_FEAT_SUSPEND\n"); xhci_dbg(xhci, "PORTSC %04x\n", temp); if (temp & PORT_RESET) @@ -1383,11 +1387,11 @@ int xhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue, case USB_PORT_FEAT_C_PORT_LINK_STATE: case USB_PORT_FEAT_C_PORT_CONFIG_ERROR: xhci_clear_port_change_bit(xhci, wValue, wIndex, - port_array[wIndex], temp); + ports[wIndex]->addr, temp); break; case USB_PORT_FEAT_ENABLE: xhci_disable_port(hcd, xhci, wIndex, - port_array[wIndex], temp); + ports[wIndex]->addr, temp); break; case USB_PORT_FEAT_POWER: xhci_set_port_power(xhci, hcd, wIndex, false, &flags); @@ -1427,7 +1431,11 @@ int xhci_hub_status_data(struct usb_hcd *hcd, char *buf) __le32 __iomem **port_array; struct xhci_bus_state *bus_state; bool reset_change = false; + struct xhci_hub *rhub; + struct xhci_port **ports; + rhub = xhci_get_rhub(hcd); + ports = rhub->ports; max_ports = xhci_get_ports(hcd, &port_array); bus_state = &xhci->bus_state[hcd_index(hcd)]; @@ -1446,7 +1454,7 @@ int xhci_hub_status_data(struct usb_hcd *hcd, char *buf) spin_lock_irqsave(&xhci->lock, flags); /* For each port, did anything change? If so, set that bit in buf. */ for (i = 0; i < max_ports; i++) { - temp = readl(port_array[i]); + temp = readl(ports[i]->addr); if (temp == ~(u32)0) { xhci_hc_died(xhci); retval = -ENODEV; @@ -1481,7 +1489,11 @@ int xhci_bus_suspend(struct usb_hcd *hcd) __le32 __iomem **port_array; struct xhci_bus_state *bus_state; unsigned long flags; + struct xhci_hub *rhub; + struct xhci_port **ports; + rhub = xhci_get_rhub(hcd); + ports = rhub->ports; max_ports = xhci_get_ports(hcd, &port_array); bus_state = &xhci->bus_state[hcd_index(hcd)]; @@ -1503,7 +1515,7 @@ int xhci_bus_suspend(struct usb_hcd *hcd) u32 t1, t2; int slot_id; - t1 = readl(port_array[port_index]); + t1 = readl(ports[port_index]->addr); t2 = xhci_port_state_to_neutral(t1); if ((t1 & PORT_PE) && !(t1 & PORT_PLS_MASK)) { @@ -1543,7 +1555,7 @@ int xhci_bus_suspend(struct usb_hcd *hcd) t1 = xhci_port_state_to_neutral(t1); if (t1 != t2) - writel(t2, port_array[port_index]); + writel(t2, ports[port_index]->addr); } hcd->state = HC_STATE_SUSPENDED; bus_state->next_statechange = jiffies + msecs_to_jiffies(10); @@ -1591,7 +1603,11 @@ int xhci_bus_resume(struct usb_hcd *hcd) int sret; u32 next_state; u32 temp, portsc; + struct xhci_hub *rhub; + struct xhci_port **ports; + rhub = xhci_get_rhub(hcd); + ports = rhub->ports; max_ports = xhci_get_ports(hcd, &port_array); bus_state = &xhci->bus_state[hcd_index(hcd)]; @@ -1617,7 +1633,7 @@ int xhci_bus_resume(struct usb_hcd *hcd) port_index = max_ports; while (port_index--) { - portsc = readl(port_array[port_index]); + portsc = readl(ports[port_index]->addr); /* warm reset CAS limited ports stuck in polling/compliance */ if ((xhci->quirks & XHCI_MISSING_CAS) && @@ -1646,7 +1662,7 @@ int xhci_bus_resume(struct usb_hcd *hcd) } /* disable wake for all ports, write new link state if needed */ portsc &= ~(PORT_RWC_BITS | PORT_CEC | PORT_WAKE_BITS); - writel(portsc, port_array[port_index]); + writel(portsc, ports[port_index]->addr); } /* USB2 specific resume signaling delay and U0 link state transition */ @@ -1668,7 +1684,7 @@ int xhci_bus_resume(struct usb_hcd *hcd) /* poll for U0 link state complete, both USB2 and USB3 */ for_each_set_bit(port_index, &bus_state->bus_suspended, BITS_PER_LONG) { - sret = xhci_handshake(port_array[port_index], PORT_PLC, + sret = xhci_handshake(ports[port_index]->addr, PORT_PLC, PORT_PLC, 10 * 1000); if (sret) { xhci_warn(xhci, "port %d resume PLC timeout\n", -- cgit v1.1 From fdcf74ffef640fd30402863877d442c8bada7582 Mon Sep 17 00:00:00 2001 From: Mathias Nyman Date: Mon, 21 May 2018 16:39:56 +0300 Subject: xhci: xhci-hub: use new port structures for cas and wake mask functions. Use port structures instead of mmio port arrays for xhci_port_missing_cas_quirk() and xhci_set_remote_wake_mask() in xhci-hub.c Signed-off-by: Mathias Nyman Signed-off-by: Greg Kroah-Hartman --- drivers/usb/host/xhci-hub.c | 21 ++++++++++----------- 1 file changed, 10 insertions(+), 11 deletions(-) (limited to 'drivers/usb') diff --git a/drivers/usb/host/xhci-hub.c b/drivers/usb/host/xhci-hub.c index 0796f08..372b448 100644 --- a/drivers/usb/host/xhci-hub.c +++ b/drivers/usb/host/xhci-hub.c @@ -691,11 +691,11 @@ void xhci_set_link_state(struct xhci_hcd *xhci, __le32 __iomem **port_array, } static void xhci_set_remote_wake_mask(struct xhci_hcd *xhci, - __le32 __iomem **port_array, int port_id, u16 wake_mask) + struct xhci_port *port, u16 wake_mask) { u32 temp; - temp = readl(port_array[port_id]); + temp = readl(port->addr); temp = xhci_port_state_to_neutral(temp); if (wake_mask & USB_PORT_FEAT_REMOTE_WAKE_CONNECT) @@ -713,7 +713,7 @@ static void xhci_set_remote_wake_mask(struct xhci_hcd *xhci, else temp &= ~PORT_WKOC_E; - writel(temp, port_array[port_id]); + writel(temp, port->addr); } /* Test and clear port RWC bit */ @@ -1290,8 +1290,8 @@ int xhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue, xhci_dbg(xhci, "set port reset, actual port %d status = 0x%x\n", wIndex, temp); break; case USB_PORT_FEAT_REMOTE_WAKE_MASK: - xhci_set_remote_wake_mask(xhci, port_array, - wIndex, wake_mask); + xhci_set_remote_wake_mask(xhci, ports[wIndex], + wake_mask); temp = readl(ports[wIndex]->addr); xhci_dbg(xhci, "set port remote wake mask, " "actual port %d status = 0x%x\n", @@ -1568,12 +1568,11 @@ int xhci_bus_suspend(struct usb_hcd *hcd) * warm reset a USB3 device stuck in polling or compliance mode after resume. * See Intel 100/c230 series PCH specification update Doc #332692-006 Errata #8 */ -static bool xhci_port_missing_cas_quirk(int port_index, - __le32 __iomem **port_array) +static bool xhci_port_missing_cas_quirk(struct xhci_port *port) { u32 portsc; - portsc = readl(port_array[port_index]); + portsc = readl(port->addr); /* if any of these are set we are not stuck */ if (portsc & (PORT_CONNECT | PORT_CAS)) @@ -1586,9 +1585,9 @@ static bool xhci_port_missing_cas_quirk(int port_index, /* clear wakeup/change bits, and do a warm port reset */ portsc &= ~(PORT_RWC_BITS | PORT_CEC | PORT_WAKE_BITS); portsc |= PORT_WR; - writel(portsc, port_array[port_index]); + writel(portsc, port->addr); /* flush write */ - readl(port_array[port_index]); + readl(port->addr); return true; } @@ -1638,7 +1637,7 @@ int xhci_bus_resume(struct usb_hcd *hcd) /* warm reset CAS limited ports stuck in polling/compliance */ if ((xhci->quirks & XHCI_MISSING_CAS) && (hcd->speed >= HCD_USB3) && - xhci_port_missing_cas_quirk(port_index, port_array)) { + xhci_port_missing_cas_quirk(ports[port_index])) { xhci_dbg(xhci, "reset stuck port %d\n", port_index); clear_bit(port_index, &bus_state->bus_suspended); continue; -- cgit v1.1 From 52c7755ba19ee2ae97fe5bfea7627bb27d5d7602 Mon Sep 17 00:00:00 2001 From: Mathias Nyman Date: Mon, 21 May 2018 16:39:57 +0300 Subject: xhci: xhci-ring: use port structures for port event handler use port structures in the port event handler. Getting the right hcd and hcd portnumber from the hardware port number is a lot easier with port structures, and allows us to remove a lot of the previous code, including the find_faked_portnum_from_hw_index() function Signed-off-by: Mathias Nyman Signed-off-by: Greg Kroah-Hartman --- drivers/usb/host/xhci-ring.c | 79 +++++--------------------------------------- 1 file changed, 8 insertions(+), 71 deletions(-) (limited to 'drivers/usb') diff --git a/drivers/usb/host/xhci-ring.c b/drivers/usb/host/xhci-ring.c index 91a1a82..4d2d0e8 100644 --- a/drivers/usb/host/xhci-ring.c +++ b/drivers/usb/host/xhci-ring.c @@ -1497,44 +1497,6 @@ static void handle_vendor_event(struct xhci_hcd *xhci, handle_cmd_completion(xhci, &event->event_cmd); } -/* @port_id: the one-based port ID from the hardware (indexed from array of all - * port registers -- USB 3.0 and USB 2.0). - * - * Returns a zero-based port number, which is suitable for indexing into each of - * the split roothubs' port arrays and bus state arrays. - * Add one to it in order to call xhci_find_slot_id_by_port. - */ -static unsigned int find_faked_portnum_from_hw_portnum(struct usb_hcd *hcd, - struct xhci_hcd *xhci, u32 port_id) -{ - unsigned int i; - unsigned int num_similar_speed_ports = 0; - - /* port_id from the hardware is 1-based, but port_array[], usb3_ports[], - * and usb2_ports are 0-based indexes. Count the number of similar - * speed ports, up to 1 port before this port. - */ - for (i = 0; i < (port_id - 1); i++) { - u8 port_speed = xhci->port_array[i]; - - /* - * Skip ports that don't have known speeds, or have duplicate - * Extended Capabilities port speed entries. - */ - if (port_speed == 0 || port_speed == DUPLICATE_ENTRY) - continue; - - /* - * USB 3.0 ports are always under a USB 3.0 hub. USB 2.0 and - * 1.1 ports are under the USB 2.0 hub. If the port speed - * matches the device speed, it's a similar speed port. - */ - if ((port_speed == 0x03) == (hcd->speed >= HCD_USB3)) - num_similar_speed_ports++; - } - return num_similar_speed_ports; -} - static void handle_device_notification(struct xhci_hcd *xhci, union xhci_trb *event) { @@ -1564,10 +1526,10 @@ static void handle_port_status(struct xhci_hcd *xhci, int max_ports; int slot_id; unsigned int faked_port_index; - u8 major_revision; struct xhci_bus_state *bus_state; __le32 __iomem **port_array; bool bogus_port_status = false; + struct xhci_port *port; /* Port status change events always have a successful completion code */ if (GET_COMP_CODE(le32_to_cpu(event->generic.field[2])) != COMP_SUCCESS) @@ -1584,47 +1546,22 @@ static void handle_port_status(struct xhci_hcd *xhci, return; } - /* Figure out which usb_hcd this port is attached to: - * is it a USB 3.0 port or a USB 2.0/1.1 port? - */ - major_revision = xhci->port_array[port_id - 1]; - - /* Find the right roothub. */ - hcd = xhci_to_hcd(xhci); - if ((major_revision == 0x03) != (hcd->speed >= HCD_USB3)) - hcd = xhci->shared_hcd; - - if (major_revision == 0) { - xhci_warn(xhci, "Event for port %u not in " - "Extended Capabilities, ignoring.\n", - port_id); - bogus_port_status = true; - goto cleanup; - } - if (major_revision == DUPLICATE_ENTRY) { - xhci_warn(xhci, "Event for port %u duplicated in" - "Extended Capabilities, ignoring.\n", - port_id); + port = &xhci->hw_ports[port_id - 1]; + if (!port || !port->rhub || port->hcd_portnum == DUPLICATE_ENTRY) { + xhci_warn(xhci, "Event for invalid port %u\n", port_id); bogus_port_status = true; goto cleanup; } - /* - * Hardware port IDs reported by a Port Status Change Event include USB - * 3.0 and USB 2.0 ports. We want to check if the port has reported a - * resume event, but we first need to translate the hardware port ID - * into the index into the ports on the correct split roothub, and the - * correct bus_state structure. - */ + hcd = port->rhub->hcd; bus_state = &xhci->bus_state[hcd_index(hcd)]; if (hcd->speed >= HCD_USB3) port_array = xhci->usb3_ports; else port_array = xhci->usb2_ports; - /* Find the faked port hub number */ - faked_port_index = find_faked_portnum_from_hw_portnum(hcd, xhci, - port_id); - portsc = readl(port_array[faked_port_index]); + + faked_port_index = port->hcd_portnum; + portsc = readl(port->addr); trace_xhci_handle_port_status(faked_port_index, portsc); -- cgit v1.1 From 74e6ad583aa34a8de3ab3bc209256c3b53a1af4b Mon Sep 17 00:00:00 2001 From: Mathias Nyman Date: Mon, 21 May 2018 16:39:58 +0300 Subject: xhci: rename faked_port_index to hcd_portnum hcd_portnum is a better desctiption than faked_port_index, and is in line with the name the port structure uses. No functional changes Signed-off-by: Mathias Nyman Signed-off-by: Greg Kroah-Hartman --- drivers/usb/host/xhci-ring.c | 41 +++++++++++++++++++---------------------- 1 file changed, 19 insertions(+), 22 deletions(-) (limited to 'drivers/usb') diff --git a/drivers/usb/host/xhci-ring.c b/drivers/usb/host/xhci-ring.c index 4d2d0e8..31b7213 100644 --- a/drivers/usb/host/xhci-ring.c +++ b/drivers/usb/host/xhci-ring.c @@ -1525,7 +1525,7 @@ static void handle_port_status(struct xhci_hcd *xhci, u32 portsc, cmd_reg; int max_ports; int slot_id; - unsigned int faked_port_index; + unsigned int hcd_portnum; struct xhci_bus_state *bus_state; __le32 __iomem **port_array; bool bogus_port_status = false; @@ -1560,10 +1560,10 @@ static void handle_port_status(struct xhci_hcd *xhci, else port_array = xhci->usb2_ports; - faked_port_index = port->hcd_portnum; + hcd_portnum = port->hcd_portnum; portsc = readl(port->addr); - trace_xhci_handle_port_status(faked_port_index, portsc); + trace_xhci_handle_port_status(hcd_portnum, portsc); if (hcd->state == HC_STATE_SUSPENDED) { xhci_dbg(xhci, "resume root hub\n"); @@ -1571,7 +1571,7 @@ static void handle_port_status(struct xhci_hcd *xhci, } if (hcd->speed >= HCD_USB3 && (portsc & PORT_PLS_MASK) == XDEV_INACTIVE) - bus_state->port_remote_wakeup &= ~(1 << faked_port_index); + bus_state->port_remote_wakeup &= ~(1 << hcd_portnum); if ((portsc & PORT_PLC) && (portsc & PORT_PLS_MASK) == XDEV_RESUME) { xhci_dbg(xhci, "port resume event for port %d\n", port_id); @@ -1588,29 +1588,28 @@ static void handle_port_status(struct xhci_hcd *xhci, * so we can tell the difference between the end of * device and host initiated resume. */ - bus_state->port_remote_wakeup |= 1 << faked_port_index; + bus_state->port_remote_wakeup |= 1 << hcd_portnum; xhci_test_and_clear_bit(xhci, port_array, - faked_port_index, PORT_PLC); - xhci_set_link_state(xhci, port_array, faked_port_index, + hcd_portnum, PORT_PLC); + xhci_set_link_state(xhci, port_array, hcd_portnum, XDEV_U0); /* Need to wait until the next link state change * indicates the device is actually in U0. */ bogus_port_status = true; goto cleanup; - } else if (!test_bit(faked_port_index, - &bus_state->resuming_ports)) { + } else if (!test_bit(hcd_portnum, &bus_state->resuming_ports)) { xhci_dbg(xhci, "resume HS port %d\n", port_id); - bus_state->resume_done[faked_port_index] = jiffies + + bus_state->resume_done[hcd_portnum] = jiffies + msecs_to_jiffies(USB_RESUME_TIMEOUT); - set_bit(faked_port_index, &bus_state->resuming_ports); + set_bit(hcd_portnum, &bus_state->resuming_ports); /* Do the rest in GetPortStatus after resume time delay. * Avoid polling roothub status before that so that a * usb device auto-resume latency around ~40ms. */ set_bit(HCD_FLAG_POLL_RH, &hcd->flags); mod_timer(&hcd->rh_timer, - bus_state->resume_done[faked_port_index]); + bus_state->resume_done[hcd_portnum]); bogus_port_status = true; } } @@ -1625,17 +1624,15 @@ static void handle_port_status(struct xhci_hcd *xhci, * so the roothub behavior is consistent with external * USB 3.0 hub behavior. */ - slot_id = xhci_find_slot_id_by_port(hcd, xhci, - faked_port_index + 1); + slot_id = xhci_find_slot_id_by_port(hcd, xhci, hcd_portnum + 1); if (slot_id && xhci->devs[slot_id]) xhci_ring_device(xhci, slot_id); - if (bus_state->port_remote_wakeup & (1 << faked_port_index)) { - bus_state->port_remote_wakeup &= - ~(1 << faked_port_index); + if (bus_state->port_remote_wakeup & (1 << hcd_portnum)) { + bus_state->port_remote_wakeup &= ~(1 << hcd_portnum); xhci_test_and_clear_bit(xhci, port_array, - faked_port_index, PORT_PLC); + hcd_portnum, PORT_PLC); usb_wakeup_notification(hcd->self.root_hub, - faked_port_index + 1); + hcd_portnum + 1); bogus_port_status = true; goto cleanup; } @@ -1647,15 +1644,15 @@ static void handle_port_status(struct xhci_hcd *xhci, * out of the RExit state. */ if (!DEV_SUPERSPEED_ANY(portsc) && - test_and_clear_bit(faked_port_index, + test_and_clear_bit(hcd_portnum, &bus_state->rexit_ports)) { - complete(&bus_state->rexit_done[faked_port_index]); + complete(&bus_state->rexit_done[hcd_portnum]); bogus_port_status = true; goto cleanup; } if (hcd->speed < HCD_USB3) - xhci_test_and_clear_bit(xhci, port_array, faked_port_index, + xhci_test_and_clear_bit(xhci, port_array, hcd_portnum, PORT_PLC); cleanup: -- cgit v1.1 From 6b7f40f712344ec8fdca10450834825094e797fb Mon Sep 17 00:00:00 2001 From: Mathias Nyman Date: Mon, 21 May 2018 16:39:59 +0300 Subject: xhci: change xhci_set_link_state() to work with port structures Remove old iomem port array and index as parameters, just send a ponter to a port strucure instread Signed-off-by: Mathias Nyman Signed-off-by: Greg Kroah-Hartman --- drivers/usb/host/xhci-hub.c | 34 ++++++++++++++++------------------ drivers/usb/host/xhci-ring.c | 3 +-- drivers/usb/host/xhci.h | 4 ++-- 3 files changed, 19 insertions(+), 22 deletions(-) (limited to 'drivers/usb') diff --git a/drivers/usb/host/xhci-hub.c b/drivers/usb/host/xhci-hub.c index 372b448..e3be8d1 100644 --- a/drivers/usb/host/xhci-hub.c +++ b/drivers/usb/host/xhci-hub.c @@ -678,16 +678,16 @@ static int xhci_exit_test_mode(struct xhci_hcd *xhci) return xhci_reset(xhci); } -void xhci_set_link_state(struct xhci_hcd *xhci, __le32 __iomem **port_array, - int port_id, u32 link_state) +void xhci_set_link_state(struct xhci_hcd *xhci, struct xhci_port *port, + u32 link_state) { u32 temp; - temp = readl(port_array[port_id]); + temp = readl(port->addr); temp = xhci_port_state_to_neutral(temp); temp &= ~PORT_PLS_MASK; temp |= PORT_LINK_STROBE | link_state; - writel(temp, port_array[port_id]); + writel(temp, port->addr); } static void xhci_set_remote_wake_mask(struct xhci_hcd *xhci, @@ -932,8 +932,7 @@ static u32 xhci_get_port_status(struct usb_hcd *hcd, xhci_test_and_clear_bit(xhci, port_array, wIndex, PORT_PLC); - xhci_set_link_state(xhci, port_array, wIndex, - XDEV_U0); + xhci_set_link_state(xhci, port, XDEV_U0); spin_unlock_irqrestore(&xhci->lock, flags); time_left = wait_for_completion_timeout( @@ -1142,7 +1141,7 @@ int xhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue, temp = readl(ports[wIndex]->addr); if ((temp & PORT_PLS_MASK) != XDEV_U0) { /* Resume the port to U0 first */ - xhci_set_link_state(xhci, port_array, wIndex, + xhci_set_link_state(xhci, ports[wIndex], XDEV_U0); spin_unlock_irqrestore(&xhci->lock, flags); msleep(10); @@ -1170,7 +1169,7 @@ int xhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue, xhci_stop_device(xhci, slot_id, 1); spin_lock_irqsave(&xhci->lock, flags); - xhci_set_link_state(xhci, port_array, wIndex, XDEV_U3); + xhci_set_link_state(xhci, ports[wIndex], XDEV_U3); spin_unlock_irqrestore(&xhci->lock, flags); msleep(10); /* wait device to enter */ @@ -1200,8 +1199,8 @@ int xhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue, /* Put link in RxDetect (enable port) */ if (link_state == USB_SS_PORT_LS_RX_DETECT) { xhci_dbg(xhci, "Enable port %d\n", wIndex); - xhci_set_link_state(xhci, port_array, wIndex, - link_state); + xhci_set_link_state(xhci, ports[wIndex], + link_state); temp = readl(ports[wIndex]->addr); break; } @@ -1233,8 +1232,9 @@ int xhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue, xhci_dbg(xhci, "Enable compliance mode transition for port %d\n", wIndex); - xhci_set_link_state(xhci, port_array, wIndex, + xhci_set_link_state(xhci, ports[wIndex], link_state); + temp = readl(ports[wIndex]->addr); break; } @@ -1262,8 +1262,7 @@ int xhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue, } } - xhci_set_link_state(xhci, port_array, wIndex, - link_state); + xhci_set_link_state(xhci, ports[wIndex], link_state); spin_unlock_irqrestore(&xhci->lock, flags); msleep(20); /* wait device to enter */ @@ -1357,12 +1356,12 @@ int xhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue, goto error; set_bit(wIndex, &bus_state->resuming_ports); - xhci_set_link_state(xhci, port_array, wIndex, - XDEV_RESUME); + xhci_set_link_state(xhci, ports[wIndex], + XDEV_RESUME); spin_unlock_irqrestore(&xhci->lock, flags); msleep(USB_RESUME_TIMEOUT); spin_lock_irqsave(&xhci->lock, flags); - xhci_set_link_state(xhci, port_array, wIndex, + xhci_set_link_state(xhci, ports[wIndex], XDEV_U0); clear_bit(wIndex, &bus_state->resuming_ports); } @@ -1676,8 +1675,7 @@ int xhci_bus_resume(struct usb_hcd *hcd) /* Clear PLC to poll it later for U0 transition */ xhci_test_and_clear_bit(xhci, port_array, port_index, PORT_PLC); - xhci_set_link_state(xhci, port_array, port_index, - XDEV_U0); + xhci_set_link_state(xhci, ports[port_index], XDEV_U0); } } diff --git a/drivers/usb/host/xhci-ring.c b/drivers/usb/host/xhci-ring.c index 31b7213..6e4211e 100644 --- a/drivers/usb/host/xhci-ring.c +++ b/drivers/usb/host/xhci-ring.c @@ -1591,8 +1591,7 @@ static void handle_port_status(struct xhci_hcd *xhci, bus_state->port_remote_wakeup |= 1 << hcd_portnum; xhci_test_and_clear_bit(xhci, port_array, hcd_portnum, PORT_PLC); - xhci_set_link_state(xhci, port_array, hcd_portnum, - XDEV_U0); + xhci_set_link_state(xhci, port, XDEV_U0); /* Need to wait until the next link state change * indicates the device is actually in U0. */ diff --git a/drivers/usb/host/xhci.h b/drivers/usb/host/xhci.h index cdf8e1a..a13b431 100644 --- a/drivers/usb/host/xhci.h +++ b/drivers/usb/host/xhci.h @@ -2102,8 +2102,8 @@ void inc_deq(struct xhci_hcd *xhci, struct xhci_ring *ring); unsigned int count_trbs(u64 addr, u64 len); /* xHCI roothub code */ -void xhci_set_link_state(struct xhci_hcd *xhci, __le32 __iomem **port_array, - int port_id, u32 link_state); +void xhci_set_link_state(struct xhci_hcd *xhci, struct xhci_port *port, + u32 link_state); void xhci_test_and_clear_bit(struct xhci_hcd *xhci, __le32 __iomem **port_array, int port_id, u32 port_bit); int xhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue, u16 wIndex, -- cgit v1.1 From eaefcf246b56ec888ccbbb6b39da688166d4d4fb Mon Sep 17 00:00:00 2001 From: Mathias Nyman Date: Mon, 21 May 2018 16:40:00 +0300 Subject: xhci: change xhci_test_and_clear_bit() to use new port structure Don't use pointers to port array and port index as function parameters in xhci_test_and_clear_bit(), just use a pointer to the right port structure. xhci_test_and_clear_bit() was the last port_array user in xhci_get_port_status() and handle_port_status(), so remove the port_array from them as well. Signed-off-by: Mathias Nyman Signed-off-by: Greg Kroah-Hartman --- drivers/usb/host/xhci-hub.c | 22 ++++++++++------------ drivers/usb/host/xhci-ring.c | 15 +++------------ drivers/usb/host/xhci.h | 4 ++-- 3 files changed, 15 insertions(+), 26 deletions(-) (limited to 'drivers/usb') diff --git a/drivers/usb/host/xhci-hub.c b/drivers/usb/host/xhci-hub.c index e3be8d1..05115b8 100644 --- a/drivers/usb/host/xhci-hub.c +++ b/drivers/usb/host/xhci-hub.c @@ -717,16 +717,16 @@ static void xhci_set_remote_wake_mask(struct xhci_hcd *xhci, } /* Test and clear port RWC bit */ -void xhci_test_and_clear_bit(struct xhci_hcd *xhci, __le32 __iomem **port_array, - int port_id, u32 port_bit) +void xhci_test_and_clear_bit(struct xhci_hcd *xhci, struct xhci_port *port, + u32 port_bit) { u32 temp; - temp = readl(port_array[port_id]); + temp = readl(port->addr); if (temp & port_bit) { temp = xhci_port_state_to_neutral(temp); temp |= port_bit; - writel(temp, port_array[port_id]); + writel(temp, port->addr); } } @@ -846,8 +846,7 @@ static u32 xhci_get_ext_port_status(u32 raw_port_status, u32 port_li) */ static u32 xhci_get_port_status(struct usb_hcd *hcd, struct xhci_bus_state *bus_state, - __le32 __iomem **port_array, - u16 wIndex, u32 raw_port_status, + u16 wIndex, u32 raw_port_status, unsigned long flags) __releases(&xhci->lock) __acquires(&xhci->lock) @@ -930,8 +929,7 @@ static u32 xhci_get_port_status(struct usb_hcd *hcd, set_bit(wIndex, &bus_state->rexit_ports); - xhci_test_and_clear_bit(xhci, port_array, wIndex, - PORT_PLC); + xhci_test_and_clear_bit(xhci, port, PORT_PLC); xhci_set_link_state(xhci, port, XDEV_U0); spin_unlock_irqrestore(&xhci->lock, flags); @@ -1091,8 +1089,8 @@ int xhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue, break; } trace_xhci_get_port_status(wIndex, temp); - status = xhci_get_port_status(hcd, bus_state, port_array, - wIndex, temp, flags); + status = xhci_get_port_status(hcd, bus_state, wIndex, temp, + flags); if (status == 0xffffffff) goto error; @@ -1673,7 +1671,7 @@ int xhci_bus_resume(struct usb_hcd *hcd) for_each_set_bit(port_index, &bus_state->bus_suspended, BITS_PER_LONG) { /* Clear PLC to poll it later for U0 transition */ - xhci_test_and_clear_bit(xhci, port_array, port_index, + xhci_test_and_clear_bit(xhci, ports[port_index], PORT_PLC); xhci_set_link_state(xhci, ports[port_index], XDEV_U0); } @@ -1688,7 +1686,7 @@ int xhci_bus_resume(struct usb_hcd *hcd) port_index); continue; } - xhci_test_and_clear_bit(xhci, port_array, port_index, PORT_PLC); + xhci_test_and_clear_bit(xhci, ports[port_index], PORT_PLC); slot_id = xhci_find_slot_id_by_port(hcd, xhci, port_index + 1); if (slot_id) xhci_ring_device(xhci, slot_id); diff --git a/drivers/usb/host/xhci-ring.c b/drivers/usb/host/xhci-ring.c index 6e4211e..f0a99aa 100644 --- a/drivers/usb/host/xhci-ring.c +++ b/drivers/usb/host/xhci-ring.c @@ -1527,7 +1527,6 @@ static void handle_port_status(struct xhci_hcd *xhci, int slot_id; unsigned int hcd_portnum; struct xhci_bus_state *bus_state; - __le32 __iomem **port_array; bool bogus_port_status = false; struct xhci_port *port; @@ -1555,11 +1554,6 @@ static void handle_port_status(struct xhci_hcd *xhci, hcd = port->rhub->hcd; bus_state = &xhci->bus_state[hcd_index(hcd)]; - if (hcd->speed >= HCD_USB3) - port_array = xhci->usb3_ports; - else - port_array = xhci->usb2_ports; - hcd_portnum = port->hcd_portnum; portsc = readl(port->addr); @@ -1589,8 +1583,7 @@ static void handle_port_status(struct xhci_hcd *xhci, * device and host initiated resume. */ bus_state->port_remote_wakeup |= 1 << hcd_portnum; - xhci_test_and_clear_bit(xhci, port_array, - hcd_portnum, PORT_PLC); + xhci_test_and_clear_bit(xhci, port, PORT_PLC); xhci_set_link_state(xhci, port, XDEV_U0); /* Need to wait until the next link state change * indicates the device is actually in U0. @@ -1628,8 +1621,7 @@ static void handle_port_status(struct xhci_hcd *xhci, xhci_ring_device(xhci, slot_id); if (bus_state->port_remote_wakeup & (1 << hcd_portnum)) { bus_state->port_remote_wakeup &= ~(1 << hcd_portnum); - xhci_test_and_clear_bit(xhci, port_array, - hcd_portnum, PORT_PLC); + xhci_test_and_clear_bit(xhci, port, PORT_PLC); usb_wakeup_notification(hcd->self.root_hub, hcd_portnum + 1); bogus_port_status = true; @@ -1651,8 +1643,7 @@ static void handle_port_status(struct xhci_hcd *xhci, } if (hcd->speed < HCD_USB3) - xhci_test_and_clear_bit(xhci, port_array, hcd_portnum, - PORT_PLC); + xhci_test_and_clear_bit(xhci, port, PORT_PLC); cleanup: /* Update event ring dequeue pointer before dropping the lock */ diff --git a/drivers/usb/host/xhci.h b/drivers/usb/host/xhci.h index a13b431..f1b37d3 100644 --- a/drivers/usb/host/xhci.h +++ b/drivers/usb/host/xhci.h @@ -2104,8 +2104,8 @@ unsigned int count_trbs(u64 addr, u64 len); /* xHCI roothub code */ void xhci_set_link_state(struct xhci_hcd *xhci, struct xhci_port *port, u32 link_state); -void xhci_test_and_clear_bit(struct xhci_hcd *xhci, __le32 __iomem **port_array, - int port_id, u32 port_bit); +void xhci_test_and_clear_bit(struct xhci_hcd *xhci, struct xhci_port *port, + u32 port_bit); int xhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue, u16 wIndex, char *buf, u16 wLength); int xhci_hub_status_data(struct usb_hcd *hcd, char *buf); -- cgit v1.1 From 38986ffa6a74899be83126d55f043a1c034cba7d Mon Sep 17 00:00:00 2001 From: Mathias Nyman Date: Mon, 21 May 2018 16:40:01 +0300 Subject: xhci: use port structures instead of port arrays in xhci.c functions get rid of port iomem arrays and use port structures in the following functions: xhci_find_raw_port_number() xhci_disable_port_wake_on_bits() xhci_set_usb2_hardware_lpm() xhci_all_ports_seen_u0() compliance_mode_recovery() Signed-off-by: Mathias Nyman Signed-off-by: Greg Kroah-Hartman --- drivers/usb/host/xhci.c | 50 ++++++++++++++++++++++--------------------------- 1 file changed, 22 insertions(+), 28 deletions(-) (limited to 'drivers/usb') diff --git a/drivers/usb/host/xhci.c b/drivers/usb/host/xhci.c index f614ba1..02e2697 100644 --- a/drivers/usb/host/xhci.c +++ b/drivers/usb/host/xhci.c @@ -400,13 +400,15 @@ static void compliance_mode_recovery(struct timer_list *t) { struct xhci_hcd *xhci; struct usb_hcd *hcd; + struct xhci_hub *rhub; u32 temp; int i; xhci = from_timer(xhci, t, comp_mode_recovery_timer); + rhub = &xhci->usb3_rhub; - for (i = 0; i < xhci->num_usb3_ports; i++) { - temp = readl(xhci->usb3_ports[i]); + for (i = 0; i < rhub->num_ports; i++) { + temp = readl(rhub->ports[i]->addr); if ((temp & PORT_PLS_MASK) == USB_SS_PORT_LS_COMP_MOD) { /* * Compliance Mode Detected. Letting USB Core @@ -426,7 +428,7 @@ static void compliance_mode_recovery(struct timer_list *t) } } - if (xhci->port_status_u0 != ((1 << xhci->num_usb3_ports)-1)) + if (xhci->port_status_u0 != ((1 << rhub->num_ports) - 1)) mod_timer(&xhci->comp_mode_recovery_timer, jiffies + msecs_to_jiffies(COMP_MODE_RCVRY_MSECS)); } @@ -483,7 +485,7 @@ static bool xhci_compliance_mode_recovery_timer_quirk_check(void) static int xhci_all_ports_seen_u0(struct xhci_hcd *xhci) { - return (xhci->port_status_u0 == ((1 << xhci->num_usb3_ports)-1)); + return (xhci->port_status_u0 == ((1 << xhci->usb3_rhub.num_ports) - 1)); } @@ -812,33 +814,33 @@ static void xhci_clear_command_ring(struct xhci_hcd *xhci) static void xhci_disable_port_wake_on_bits(struct xhci_hcd *xhci) { + struct xhci_port **ports; int port_index; - __le32 __iomem **port_array; unsigned long flags; u32 t1, t2; spin_lock_irqsave(&xhci->lock, flags); /* disable usb3 ports Wake bits */ - port_index = xhci->num_usb3_ports; - port_array = xhci->usb3_ports; + port_index = xhci->usb3_rhub.num_ports; + ports = xhci->usb3_rhub.ports; while (port_index--) { - t1 = readl(port_array[port_index]); + t1 = readl(ports[port_index]->addr); t1 = xhci_port_state_to_neutral(t1); t2 = t1 & ~PORT_WAKE_BITS; if (t1 != t2) - writel(t2, port_array[port_index]); + writel(t2, ports[port_index]->addr); } /* disable usb2 ports Wake bits */ - port_index = xhci->num_usb2_ports; - port_array = xhci->usb2_ports; + port_index = xhci->usb2_rhub.num_ports; + ports = xhci->usb2_rhub.ports; while (port_index--) { - t1 = readl(port_array[port_index]); + t1 = readl(ports[port_index]->addr); t1 = xhci_port_state_to_neutral(t1); t2 = t1 & ~PORT_WAKE_BITS; if (t1 != t2) - writel(t2, port_array[port_index]); + writel(t2, ports[port_index]->addr); } spin_unlock_irqrestore(&xhci->lock, flags); @@ -3976,18 +3978,10 @@ static int xhci_enable_device(struct usb_hcd *hcd, struct usb_device *udev) */ int xhci_find_raw_port_number(struct usb_hcd *hcd, int port1) { - struct xhci_hcd *xhci = hcd_to_xhci(hcd); - __le32 __iomem *base_addr = &xhci->op_regs->port_status_base; - __le32 __iomem *addr; - int raw_port; - - if (hcd->speed < HCD_USB3) - addr = xhci->usb2_ports[port1 - 1]; - else - addr = xhci->usb3_ports[port1 - 1]; + struct xhci_hub *rhub; - raw_port = (addr - base_addr)/NUM_PORT_REGS + 1; - return raw_port; + rhub = xhci_get_rhub(hcd); + return rhub->ports[port1 - 1]->hw_portnum + 1; } /* @@ -4120,7 +4114,7 @@ static int xhci_set_usb2_hardware_lpm(struct usb_hcd *hcd, struct usb_device *udev, int enable) { struct xhci_hcd *xhci = hcd_to_xhci(hcd); - __le32 __iomem **port_array; + struct xhci_port **ports; __le32 __iomem *pm_addr, *hlpm_addr; u32 pm_val, hlpm_val, field; unsigned int port_num; @@ -4141,11 +4135,11 @@ static int xhci_set_usb2_hardware_lpm(struct usb_hcd *hcd, spin_lock_irqsave(&xhci->lock, flags); - port_array = xhci->usb2_ports; + ports = xhci->usb2_rhub.ports; port_num = udev->portnum - 1; - pm_addr = port_array[port_num] + PORTPMSC; + pm_addr = ports[port_num]->addr + PORTPMSC; pm_val = readl(pm_addr); - hlpm_addr = port_array[port_num] + PORTHLPMC; + hlpm_addr = ports[port_num]->addr + PORTHLPMC; field = le32_to_cpu(udev->bos->ext_cap->bmAttributes); xhci_dbg(xhci, "%s port %d USB2 hardware LPM\n", -- cgit v1.1 From 925f349d4dca1357813efdc37ec08134d79b3288 Mon Sep 17 00:00:00 2001 From: Mathias Nyman Date: Mon, 21 May 2018 16:40:02 +0300 Subject: xhci: xhci-hub: use port structure members instead of xhci_get_ports() xhci_get_ports() is one of the last functions using port_arrays in xhci-hub.c. We get the same data directly from hub and port structures instead, so convert and remove both xhci_get_ports() and port_arrays from all function that no longer need it. Signed-off-by: Mathias Nyman Signed-off-by: Greg Kroah-Hartman --- drivers/usb/host/xhci-hub.c | 28 ++++------------------------ 1 file changed, 4 insertions(+), 24 deletions(-) (limited to 'drivers/usb') diff --git a/drivers/usb/host/xhci-hub.c b/drivers/usb/host/xhci-hub.c index 05115b8..a4b95d0 100644 --- a/drivers/usb/host/xhci-hub.c +++ b/drivers/usb/host/xhci-hub.c @@ -541,22 +541,6 @@ static void xhci_clear_port_change_bit(struct xhci_hcd *xhci, u16 wValue, port_change_bit, wIndex, port_status); } -static int xhci_get_ports(struct usb_hcd *hcd, __le32 __iomem ***port_array) -{ - int max_ports; - struct xhci_hcd *xhci = hcd_to_xhci(hcd); - - if (hcd->speed >= HCD_USB3) { - max_ports = xhci->num_usb3_ports; - *port_array = xhci->usb3_ports; - } else { - max_ports = xhci->num_usb2_ports; - *port_array = xhci->usb2_ports; - } - - return max_ports; -} - struct xhci_hub *xhci_get_rhub(struct usb_hcd *hcd) { struct xhci_hcd *xhci = hcd_to_xhci(hcd); @@ -1032,7 +1016,6 @@ int xhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue, unsigned long flags; u32 temp, status; int retval = 0; - __le32 __iomem **port_array; int slot_id; struct xhci_bus_state *bus_state; u16 link_state = 0; @@ -1044,7 +1027,7 @@ int xhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue, rhub = xhci_get_rhub(hcd); ports = rhub->ports; - max_ports = xhci_get_ports(hcd, &port_array); + max_ports = rhub->num_ports; bus_state = &xhci->bus_state[hcd_index(hcd)]; spin_lock_irqsave(&xhci->lock, flags); @@ -1425,7 +1408,6 @@ int xhci_hub_status_data(struct usb_hcd *hcd, char *buf) int i, retval; struct xhci_hcd *xhci = hcd_to_xhci(hcd); int max_ports; - __le32 __iomem **port_array; struct xhci_bus_state *bus_state; bool reset_change = false; struct xhci_hub *rhub; @@ -1433,7 +1415,7 @@ int xhci_hub_status_data(struct usb_hcd *hcd, char *buf) rhub = xhci_get_rhub(hcd); ports = rhub->ports; - max_ports = xhci_get_ports(hcd, &port_array); + max_ports = rhub->num_ports; bus_state = &xhci->bus_state[hcd_index(hcd)]; /* Initial status is no changes */ @@ -1483,7 +1465,6 @@ int xhci_bus_suspend(struct usb_hcd *hcd) { struct xhci_hcd *xhci = hcd_to_xhci(hcd); int max_ports, port_index; - __le32 __iomem **port_array; struct xhci_bus_state *bus_state; unsigned long flags; struct xhci_hub *rhub; @@ -1491,7 +1472,7 @@ int xhci_bus_suspend(struct usb_hcd *hcd) rhub = xhci_get_rhub(hcd); ports = rhub->ports; - max_ports = xhci_get_ports(hcd, &port_array); + max_ports = rhub->num_ports; bus_state = &xhci->bus_state[hcd_index(hcd)]; spin_lock_irqsave(&xhci->lock, flags); @@ -1592,7 +1573,6 @@ int xhci_bus_resume(struct usb_hcd *hcd) { struct xhci_hcd *xhci = hcd_to_xhci(hcd); struct xhci_bus_state *bus_state; - __le32 __iomem **port_array; unsigned long flags; int max_ports, port_index; int slot_id; @@ -1604,7 +1584,7 @@ int xhci_bus_resume(struct usb_hcd *hcd) rhub = xhci_get_rhub(hcd); ports = rhub->ports; - max_ports = xhci_get_ports(hcd, &port_array); + max_ports = rhub->num_ports; bus_state = &xhci->bus_state[hcd_index(hcd)]; if (time_before(jiffies, bus_state->next_statechange)) -- cgit v1.1 From edaa30f878e4586828f74c30f8dfe02ddbfe5251 Mon Sep 17 00:00:00 2001 From: Mathias Nyman Date: Mon, 21 May 2018 16:40:03 +0300 Subject: xhci-mtk: use xhci hub structures to get number of ports in roothubs Signed-off-by: Mathias Nyman Signed-off-by: Greg Kroah-Hartman --- drivers/usb/host/xhci-mtk-sch.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'drivers/usb') diff --git a/drivers/usb/host/xhci-mtk-sch.c b/drivers/usb/host/xhci-mtk-sch.c index eea7360..fa33d6e 100644 --- a/drivers/usb/host/xhci-mtk-sch.c +++ b/drivers/usb/host/xhci-mtk-sch.c @@ -58,7 +58,7 @@ static int get_bw_index(struct xhci_hcd *xhci, struct usb_device *udev, bw_index = (virt_dev->real_port - 1) * 2 + 1; } else { /* add one more for each SS port */ - bw_index = virt_dev->real_port + xhci->num_usb3_ports - 1; + bw_index = virt_dev->real_port + xhci->usb3_rhub.num_ports - 1; } return bw_index; @@ -284,7 +284,7 @@ int xhci_mtk_sch_init(struct xhci_hcd_mtk *mtk) int i; /* ss IN and OUT are separated */ - num_usb_bus = xhci->num_usb3_ports * 2 + xhci->num_usb2_ports; + num_usb_bus = xhci->usb3_rhub.num_ports * 2 + xhci->usb2_rhub.num_ports; sch_array = kcalloc(num_usb_bus, sizeof(*sch_array), GFP_KERNEL); if (sch_array == NULL) -- cgit v1.1 From 07f7619053874ba60d620367b965b8a0ae38a696 Mon Sep 17 00:00:00 2001 From: Mathias Nyman Date: Mon, 21 May 2018 16:40:04 +0300 Subject: xhci: xhci-mem: remove port_arrays and the code initializing them As we are now using the new port strtuctes the port_arrays are no longer needed, remove them completely Signed-off-by: Mathias Nyman Signed-off-by: Greg Kroah-Hartman --- drivers/usb/host/xhci-mem.c | 100 +++++--------------------------------------- drivers/usb/host/xhci.h | 8 ---- 2 files changed, 11 insertions(+), 97 deletions(-) (limited to 'drivers/usb') diff --git a/drivers/usb/host/xhci-mem.c b/drivers/usb/host/xhci-mem.c index 8819286..0b61b77 100644 --- a/drivers/usb/host/xhci-mem.c +++ b/drivers/usb/host/xhci-mem.c @@ -1054,8 +1054,7 @@ void xhci_copy_ep0_dequeue_into_input_ctx(struct xhci_hcd *xhci, /* * The xHCI roothub may have ports of differing speeds in any order in the port - * status registers. xhci->port_array provides an array of the port speed for - * each offset into the port status registers. + * status registers. * * The xHCI hardware wants to know the roothub port number that the USB device * is attached to (or the roothub port its ancestor hub is attached to). All we @@ -1890,23 +1889,15 @@ void xhci_mem_cleanup(struct xhci_hcd *xhci) no_bw: xhci->cmd_ring_reserved_trbs = 0; - xhci->num_usb2_ports = 0; - xhci->num_usb3_ports = 0; xhci->usb2_rhub.num_ports = 0; xhci->usb3_rhub.num_ports = 0; xhci->num_active_eps = 0; - kfree(xhci->usb2_ports); - kfree(xhci->usb3_ports); - kfree(xhci->port_array); kfree(xhci->usb2_rhub.ports); kfree(xhci->usb3_rhub.ports); kfree(xhci->hw_ports); kfree(xhci->rh_bw); kfree(xhci->ext_caps); - xhci->usb2_ports = NULL; - xhci->usb3_ports = NULL; - xhci->port_array = NULL; xhci->usb2_rhub.ports = NULL; xhci->usb3_rhub.ports = NULL; xhci->hw_ports = NULL; @@ -2196,25 +2187,15 @@ static void xhci_add_in_port(struct xhci_hcd *xhci, unsigned int num_ports, for (i = port_offset; i < (port_offset + port_count); i++) { struct xhci_port *hw_port = &xhci->hw_ports[i]; /* Duplicate entry. Ignore the port if the revisions differ. */ - if (xhci->port_array[i] != 0 || - hw_port->rhub) { + if (hw_port->rhub) { xhci_warn(xhci, "Duplicate port entry, Ext Cap %p," " port %u\n", addr, i); xhci_warn(xhci, "Port was marked as USB %u, " "duplicated as USB %u\n", - xhci->port_array[i], major_revision); + hw_port->rhub->maj_rev, major_revision); /* Only adjust the roothub port counts if we haven't * found a similar duplicate. */ - if (xhci->port_array[i] != major_revision && - xhci->port_array[i] != DUPLICATE_ENTRY) { - if (xhci->port_array[i] == 0x03) - xhci->num_usb3_ports--; - else - xhci->num_usb2_ports--; - xhci->port_array[i] = DUPLICATE_ENTRY; - } - /* FIXME: Should we disable the port? */ if (hw_port->rhub != rhub && hw_port->hcd_portnum != DUPLICATE_ENTRY) { hw_port->rhub->num_ports--; @@ -2222,13 +2203,8 @@ static void xhci_add_in_port(struct xhci_hcd *xhci, unsigned int num_ports, } continue; } - xhci->port_array[i] = major_revision; hw_port->rhub = rhub; rhub->num_ports++; - if (major_revision == 0x03) - xhci->num_usb3_ports++; - else - xhci->num_usb2_ports++; } /* FIXME: Should we disable ports not in the Extended Capabilities? */ } @@ -2266,14 +2242,13 @@ static int xhci_setup_port_arrays(struct xhci_hcd *xhci, gfp_t flags) void __iomem *base; u32 offset; unsigned int num_ports; - int i, j, port_index; + int i, j; int cap_count = 0; u32 cap_start; num_ports = HCS_MAX_PORTS(xhci->hcs_params1); - xhci->port_array = kzalloc(sizeof(*xhci->port_array)*num_ports, flags); xhci->hw_ports = kcalloc(num_ports, sizeof(*xhci->hw_ports), flags); - if (!xhci->port_array) + if (!xhci->hw_ports) return -ENOMEM; for (i = 0; i < num_ports; i++) { @@ -2317,41 +2292,34 @@ static int xhci_setup_port_arrays(struct xhci_hcd *xhci, gfp_t flags) while (offset) { xhci_add_in_port(xhci, num_ports, base + offset, cap_count); - if (xhci->num_usb2_ports + xhci->num_usb3_ports == num_ports) - break; if (xhci->usb2_rhub.num_ports + xhci->usb3_rhub.num_ports == num_ports) break; offset = xhci_find_next_ext_cap(base, offset, XHCI_EXT_CAPS_PROTOCOL); } - - if (xhci->num_usb2_ports == 0 && xhci->num_usb3_ports == 0) { - xhci_warn(xhci, "No ports on the roothubs?\n"); - return -ENODEV; - } if (xhci->usb2_rhub.num_ports == 0 && xhci->usb3_rhub.num_ports == 0) { xhci_warn(xhci, "No ports on the roothubs?\n"); return -ENODEV; } xhci_dbg_trace(xhci, trace_xhci_dbg_init, - "Found %u USB 2.0 ports and %u USB 3.0 ports.", - xhci->num_usb2_ports, xhci->num_usb3_ports); + "Found %u USB 2.0 ports and %u USB 3.0 ports.", + xhci->usb2_rhub.num_ports, xhci->usb3_rhub.num_ports); /* Place limits on the number of roothub ports so that the hub * descriptors aren't longer than the USB core will allocate. */ - if (xhci->num_usb3_ports > USB_SS_MAXPORTS) { + if (xhci->usb3_rhub.num_ports > USB_SS_MAXPORTS) { xhci_dbg_trace(xhci, trace_xhci_dbg_init, "Limiting USB 3.0 roothub ports to %u.", USB_SS_MAXPORTS); - xhci->num_usb3_ports = USB_SS_MAXPORTS; + xhci->usb3_rhub.num_ports = USB_SS_MAXPORTS; } - if (xhci->num_usb2_ports > USB_MAXCHILDREN) { + if (xhci->usb2_rhub.num_ports > USB_MAXCHILDREN) { xhci_dbg_trace(xhci, trace_xhci_dbg_init, "Limiting USB 2.0 roothub ports to %u.", USB_MAXCHILDREN); - xhci->num_usb2_ports = USB_MAXCHILDREN; + xhci->usb2_rhub.num_ports = USB_MAXCHILDREN; } /* @@ -2362,52 +2330,6 @@ static int xhci_setup_port_arrays(struct xhci_hcd *xhci, gfp_t flags) xhci_create_rhub_port_array(xhci, &xhci->usb2_rhub, flags); xhci_create_rhub_port_array(xhci, &xhci->usb3_rhub, flags); - if (xhci->num_usb2_ports) { - xhci->usb2_ports = kmalloc(sizeof(*xhci->usb2_ports)* - xhci->num_usb2_ports, flags); - if (!xhci->usb2_ports) - return -ENOMEM; - - port_index = 0; - for (i = 0; i < num_ports; i++) { - if (xhci->port_array[i] == 0x03 || - xhci->port_array[i] == 0 || - xhci->port_array[i] == DUPLICATE_ENTRY) - continue; - - xhci->usb2_ports[port_index] = - &xhci->op_regs->port_status_base + - NUM_PORT_REGS*i; - xhci_dbg_trace(xhci, trace_xhci_dbg_init, - "USB 2.0 port at index %u, " - "addr = %p", i, - xhci->usb2_ports[port_index]); - port_index++; - if (port_index == xhci->num_usb2_ports) - break; - } - } - if (xhci->num_usb3_ports) { - xhci->usb3_ports = kmalloc(sizeof(*xhci->usb3_ports)* - xhci->num_usb3_ports, flags); - if (!xhci->usb3_ports) - return -ENOMEM; - - port_index = 0; - for (i = 0; i < num_ports; i++) - if (xhci->port_array[i] == 0x03) { - xhci->usb3_ports[port_index] = - &xhci->op_regs->port_status_base + - NUM_PORT_REGS*i; - xhci_dbg_trace(xhci, trace_xhci_dbg_init, - "USB 3.0 port at index %u, " - "addr = %p", i, - xhci->usb3_ports[port_index]); - port_index++; - if (port_index == xhci->num_usb3_ports) - break; - } - } return 0; } diff --git a/drivers/usb/host/xhci.h b/drivers/usb/host/xhci.h index f1b37d3..6c5f001 100644 --- a/drivers/usb/host/xhci.h +++ b/drivers/usb/host/xhci.h @@ -1846,17 +1846,9 @@ struct xhci_hcd { unsigned int limit_active_eps; /* There are two roothubs to keep track of bus suspend info for */ struct xhci_bus_state bus_state[2]; - /* Is each xHCI roothub port a USB 3.0, USB 2.0, or USB 1.1 port? */ - u8 *port_array; struct xhci_port *hw_ports; - /* Array of pointers to USB 3.0 PORTSC registers */ - __le32 __iomem **usb3_ports; - unsigned int num_usb3_ports; - /* Array of pointers to USB 2.0 PORTSC registers */ - __le32 __iomem **usb2_ports; struct xhci_hub usb2_rhub; struct xhci_hub usb3_rhub; - unsigned int num_usb2_ports; /* support xHCI 0.96 spec USB2 software LPM */ unsigned sw_lpm_support:1; /* support xHCI 1.0 spec USB2 hardware LPM */ -- cgit v1.1 From 65475023928bce90a98aa4e44047fd17afead050 Mon Sep 17 00:00:00 2001 From: Mathias Nyman Date: Mon, 21 May 2018 16:40:05 +0300 Subject: xhci: debugfs: add usb ports to xhci debugfs Add ports/portxx/portsc for each xHC hardware usb port to debugfs. Showing the content of the port status and control register for each port (PORTSC) Portxx is numbered starting from 1 for historical reasons to better match port numbering shown by lsusb and other places. Ports in debugfs are in the order XHC controller has them, In most cases USB2 ports come first, followed by USB3 ports. i.e. USB2 ports are port01-portxx, and USB3 portxx-portmax. Signed-off-by: Mathias Nyman Signed-off-by: Greg Kroah-Hartman --- drivers/usb/host/xhci-debugfs.c | 48 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 48 insertions(+) (limited to 'drivers/usb') diff --git a/drivers/usb/host/xhci-debugfs.c b/drivers/usb/host/xhci-debugfs.c index 5851052..76e446a 100644 --- a/drivers/usb/host/xhci-debugfs.c +++ b/drivers/usb/host/xhci-debugfs.c @@ -333,6 +333,31 @@ static const struct file_operations xhci_context_fops = { .release = single_release, }; + + +static int xhci_portsc_show(struct seq_file *s, void *unused) +{ + struct xhci_port *port = s->private; + u32 portsc; + + portsc = readl(port->addr); + seq_printf(s, "%s\n", xhci_decode_portsc(portsc)); + + return 0; +} + +static int xhci_port_open(struct inode *inode, struct file *file) +{ + return single_open(file, xhci_portsc_show, inode->i_private); +} + +static const struct file_operations port_fops = { + .open = xhci_port_open, + .read = seq_read, + .llseek = seq_lseek, + .release = single_release, +}; + static void xhci_debugfs_create_files(struct xhci_hcd *xhci, struct xhci_file_map *files, size_t nentries, void *data, @@ -449,6 +474,27 @@ void xhci_debugfs_remove_slot(struct xhci_hcd *xhci, int slot_id) dev->debugfs_private = NULL; } +static void xhci_debugfs_create_ports(struct xhci_hcd *xhci, + struct dentry *parent) +{ + unsigned int num_ports; + char port_name[8]; + struct xhci_port *port; + struct dentry *dir; + + num_ports = HCS_MAX_PORTS(xhci->hcs_params1); + + parent = debugfs_create_dir("ports", parent); + + while (num_ports--) { + scnprintf(port_name, sizeof(port_name), "port%02d", + num_ports + 1); + dir = debugfs_create_dir(port_name, parent); + port = &xhci->hw_ports[num_ports]; + debugfs_create_file("portsc", 0444, dir, port, &port_fops); + } +} + void xhci_debugfs_init(struct xhci_hcd *xhci) { struct device *dev = xhci_to_hcd(xhci)->self.controller; @@ -497,6 +543,8 @@ void xhci_debugfs_init(struct xhci_hcd *xhci) xhci->debugfs_root); xhci->debugfs_slots = debugfs_create_dir("devices", xhci->debugfs_root); + + xhci_debugfs_create_ports(xhci, xhci->debugfs_root); } void xhci_debugfs_exit(struct xhci_hcd *xhci) -- cgit v1.1 From 87a03802184c866af35a8fcdd5fd14d94e9bf9eb Mon Sep 17 00:00:00 2001 From: Mathias Nyman Date: Mon, 21 May 2018 16:40:06 +0300 Subject: xhci: debugfs: add debugfs interface to enable compliance mode for a port Enable compliance transition for a port by writing "compliance" to the ports portsc file in debugfs. port must be "Not-connected" and Link must be in RxDetect state to enable compliance mode. Only needed for host that have CTC flag set. Allows state transitioning to compliance at 1st LFPS timeout. Signed-off-by: Mathias Nyman Signed-off-by: Greg Kroah-Hartman --- drivers/usb/host/xhci-debugfs.c | 39 ++++++++++++++++++++++++++++++++++++++- 1 file changed, 38 insertions(+), 1 deletion(-) (limited to 'drivers/usb') diff --git a/drivers/usb/host/xhci-debugfs.c b/drivers/usb/host/xhci-debugfs.c index 76e446a..cadc013 100644 --- a/drivers/usb/host/xhci-debugfs.c +++ b/drivers/usb/host/xhci-debugfs.c @@ -8,6 +8,7 @@ */ #include +#include #include "xhci.h" #include "xhci-debugfs.h" @@ -351,8 +352,44 @@ static int xhci_port_open(struct inode *inode, struct file *file) return single_open(file, xhci_portsc_show, inode->i_private); } +static ssize_t xhci_port_write(struct file *file, const char __user *ubuf, + size_t count, loff_t *ppos) +{ + struct seq_file *s = file->private_data; + struct xhci_port *port = s->private; + struct xhci_hcd *xhci = hcd_to_xhci(port->rhub->hcd); + char buf[32]; + u32 portsc; + unsigned long flags; + + if (copy_from_user(&buf, ubuf, min_t(size_t, sizeof(buf) - 1, count))) + return -EFAULT; + + if (!strncmp(buf, "compliance", 10)) { + /* If CTC is clear, compliance is enabled by default */ + if (!HCC2_CTC(xhci->hcc_params2)) + return count; + spin_lock_irqsave(&xhci->lock, flags); + /* compliance mode can only be enabled on ports in RxDetect */ + portsc = readl(port->addr); + if ((portsc & PORT_PLS_MASK) != XDEV_RXDETECT) { + spin_unlock_irqrestore(&xhci->lock, flags); + return -EPERM; + } + portsc = xhci_port_state_to_neutral(portsc); + portsc &= ~PORT_PLS_MASK; + portsc |= PORT_LINK_STROBE | XDEV_COMP_MODE; + writel(portsc, port->addr); + spin_unlock_irqrestore(&xhci->lock, flags); + } else { + return -EINVAL; + } + return count; +} + static const struct file_operations port_fops = { .open = xhci_port_open, + .write = xhci_port_write, .read = seq_read, .llseek = seq_lseek, .release = single_release, @@ -491,7 +528,7 @@ static void xhci_debugfs_create_ports(struct xhci_hcd *xhci, num_ports + 1); dir = debugfs_create_dir(port_name, parent); port = &xhci->hw_ports[num_ports]; - debugfs_create_file("portsc", 0444, dir, port, &port_fops); + debugfs_create_file("portsc", 0644, dir, port, &port_fops); } } -- cgit v1.1 From ad0c542cd218d1721b2e07e79a79763370124822 Mon Sep 17 00:00:00 2001 From: Chunfeng Yun Date: Wed, 23 May 2018 16:53:15 +0800 Subject: usb: mtu3: re-enable controller to accept LPM request after LPM resume After the controller receives a LPM request, it will reject the LPM request, and need software to re-enable it after LPM resume if the controller doesn't remote wakeup from L1 automatically Signed-off-by: Chunfeng Yun Signed-off-by: Greg Kroah-Hartman --- drivers/usb/mtu3/mtu3_core.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) (limited to 'drivers/usb') diff --git a/drivers/usb/mtu3/mtu3_core.c b/drivers/usb/mtu3/mtu3_core.c index b1b99a8..65ff53a 100644 --- a/drivers/usb/mtu3/mtu3_core.c +++ b/drivers/usb/mtu3/mtu3_core.c @@ -176,7 +176,7 @@ static void mtu3_intr_enable(struct mtu3 *mtu) mtu3_writel(mbase, U3D_LV1IESR, value); /* Enable U2 common USB interrupts */ - value = SUSPEND_INTR | RESUME_INTR | RESET_INTR; + value = SUSPEND_INTR | RESUME_INTR | RESET_INTR | LPM_RESUME_INTR; mtu3_writel(mbase, U3D_COMMON_USB_INTR_ENABLE, value); if (mtu->is_u3_ip) { @@ -692,6 +692,12 @@ static irqreturn_t mtu3_u2_common_isr(struct mtu3 *mtu) if (u2comm & RESET_INTR) mtu3_gadget_reset(mtu); + if (u2comm & LPM_RESUME_INTR) { + if (!(mtu3_readl(mbase, U3D_POWER_MANAGEMENT) & LPM_HRWE)) + mtu3_setbits(mbase, U3D_USB20_MISC_CONTROL, + LPM_U3_ACK_EN); + } + return IRQ_HANDLED; } -- cgit v1.1 From 5fcdd6de180757a3cc9a5ad66a251b81bc0b2364 Mon Sep 17 00:00:00 2001 From: Chunfeng Yun Date: Wed, 23 May 2018 16:53:16 +0800 Subject: usb: mtu3: fix uncontinuous SeqN issue after disable EP Reset EP when disable it to reset data toggle for U2 EP, and SeqN, flow control status etc for U3 EP, this can avoid issue of uncontinuous SeqN Signed-off-by: Chunfeng Yun Signed-off-by: Greg Kroah-Hartman --- drivers/usb/mtu3/mtu3_core.c | 14 ++++++++++++-- 1 file changed, 12 insertions(+), 2 deletions(-) (limited to 'drivers/usb') diff --git a/drivers/usb/mtu3/mtu3_core.c b/drivers/usb/mtu3/mtu3_core.c index 65ff53a..279f9cd 100644 --- a/drivers/usb/mtu3/mtu3_core.c +++ b/drivers/usb/mtu3/mtu3_core.c @@ -195,6 +195,16 @@ static void mtu3_intr_enable(struct mtu3 *mtu) mtu3_writel(mbase, U3D_DEV_LINK_INTR_ENABLE, SSUSB_DEV_SPEED_CHG_INTR); } +/* reset: u2 - data toggle, u3 - SeqN, flow control status etc */ +static void mtu3_ep_reset(struct mtu3_ep *mep) +{ + struct mtu3 *mtu = mep->mtu; + u32 rst_bit = EP_RST(mep->is_in, mep->epnum); + + mtu3_setbits(mtu->mac_base, U3D_EP_RST, rst_bit); + mtu3_clrbits(mtu->mac_base, U3D_EP_RST, rst_bit); +} + /* set/clear the stall and toggle bits for non-ep0 */ void mtu3_ep_stall_set(struct mtu3_ep *mep, bool set) { @@ -220,8 +230,7 @@ void mtu3_ep_stall_set(struct mtu3_ep *mep, bool set) } if (!set) { - mtu3_setbits(mbase, U3D_EP_RST, EP_RST(mep->is_in, epnum)); - mtu3_clrbits(mbase, U3D_EP_RST, EP_RST(mep->is_in, epnum)); + mtu3_ep_reset(mep); mep->flags &= ~MTU3_EP_STALL; } else { mep->flags |= MTU3_EP_STALL; @@ -400,6 +409,7 @@ void mtu3_deconfig_ep(struct mtu3 *mtu, struct mtu3_ep *mep) mtu3_setbits(mbase, U3D_QIECR0, QMU_RX_DONE_INT(epnum)); } + mtu3_ep_reset(mep); ep_fifo_free(mep); dev_dbg(mtu->dev, "%s: %s\n", __func__, mep->name); -- cgit v1.1 From fbe9db75b4941b1c52f37a9a3916971612793b0a Mon Sep 17 00:00:00 2001 From: Chunfeng Yun Date: Wed, 23 May 2018 16:53:17 +0800 Subject: usb: mtu3: clear test_mode flag when reset Clear test_mode flag when the gadget is reset by host, otherwise will affect the next test item. Signed-off-by: Chunfeng Yun Signed-off-by: Greg Kroah-Hartman --- drivers/usb/mtu3/mtu3_gadget.c | 1 + 1 file changed, 1 insertion(+) (limited to 'drivers/usb') diff --git a/drivers/usb/mtu3/mtu3_gadget.c b/drivers/usb/mtu3/mtu3_gadget.c index de0de01..5c60a8c 100644 --- a/drivers/usb/mtu3/mtu3_gadget.c +++ b/drivers/usb/mtu3/mtu3_gadget.c @@ -719,4 +719,5 @@ void mtu3_gadget_reset(struct mtu3 *mtu) mtu->u1_enable = 0; mtu->u2_enable = 0; mtu->delayed_status = false; + mtu->test_mode = false; } -- cgit v1.1 From 3d7678e2a02aa99de6c4ac090e1d8fcfbd023e34 Mon Sep 17 00:00:00 2001 From: Chunfeng Yun Date: Wed, 23 May 2018 16:53:18 +0800 Subject: usb: mtu3: avoid sleep in atomic context when enter test mode Use readl_poll_timeout_atomic() instead of readl_poll_timeout() in atomic context Signed-off-by: Chunfeng Yun Signed-off-by: Greg Kroah-Hartman --- drivers/usb/mtu3/mtu3_gadget_ep0.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers/usb') diff --git a/drivers/usb/mtu3/mtu3_gadget_ep0.c b/drivers/usb/mtu3/mtu3_gadget_ep0.c index 0d2b1cf..25216e7 100644 --- a/drivers/usb/mtu3/mtu3_gadget_ep0.c +++ b/drivers/usb/mtu3/mtu3_gadget_ep0.c @@ -299,7 +299,7 @@ static int handle_test_mode(struct mtu3 *mtu, struct usb_ctrlrequest *setup) mtu3_writel(mbase, U3D_EP0CSR, value | EP0_SETUPPKTRDY | EP0_DATAEND); /* wait for ACK status sent by host */ - readl_poll_timeout(mbase + U3D_EP0CSR, value, + readl_poll_timeout_atomic(mbase + U3D_EP0CSR, value, !(value & EP0_DATAEND), 100, 5000); mtu3_writel(mbase, U3D_USB2_TEST_MODE, mtu->test_mode_nr); -- cgit v1.1 From 4f9f032c256c3fc8ed23461e71d7acf3363a969f Mon Sep 17 00:00:00 2001 From: Chunfeng Yun Date: Wed, 23 May 2018 16:53:19 +0800 Subject: usb: mtu3: reset gadget when VBUS_FALL interrupt arises When VBUS_FALL interrupt arises, it means U3 device is disconnected with host, so need reset status of gadget Signed-off-by: Chunfeng Yun Signed-off-by: Greg Kroah-Hartman --- drivers/usb/mtu3/mtu3_core.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) (limited to 'drivers/usb') diff --git a/drivers/usb/mtu3/mtu3_core.c b/drivers/usb/mtu3/mtu3_core.c index 279f9cd..eecfd06 100644 --- a/drivers/usb/mtu3/mtu3_core.c +++ b/drivers/usb/mtu3/mtu3_core.c @@ -668,8 +668,10 @@ static irqreturn_t mtu3_u3_ltssm_isr(struct mtu3 *mtu) if (ltssm & (HOT_RST_INTR | WARM_RST_INTR)) mtu3_gadget_reset(mtu); - if (ltssm & VBUS_FALL_INTR) + if (ltssm & VBUS_FALL_INTR) { mtu3_ss_func_set(mtu, false); + mtu3_gadget_reset(mtu); + } if (ltssm & VBUS_RISE_INTR) mtu3_ss_func_set(mtu, true); -- cgit v1.1 From 681e9485241463e1e8d8cfd0a11fb252f49c997f Mon Sep 17 00:00:00 2001 From: Chunfeng Yun Date: Wed, 23 May 2018 16:53:20 +0800 Subject: usb: mtu3: fix warning of sleep in atomic context in notifier callback The notifier callbacks of extcon are called in atomic context, but the callbacks will call regulator_enable()/regulator_disable() which may sleep caused by mutex, so use work queue to call the sleep functions. Signed-off-by: Chunfeng Yun Signed-off-by: Greg Kroah-Hartman --- drivers/usb/mtu3/mtu3.h | 11 ++++++++++- drivers/usb/mtu3/mtu3_dr.c | 44 ++++++++++++++++++++++++++++++++++++-------- 2 files changed, 46 insertions(+), 9 deletions(-) (limited to 'drivers/usb') diff --git a/drivers/usb/mtu3/mtu3.h b/drivers/usb/mtu3/mtu3.h index a56fee0..87823ac 100644 --- a/drivers/usb/mtu3/mtu3.h +++ b/drivers/usb/mtu3/mtu3.h @@ -196,7 +196,12 @@ struct mtu3_gpd_ring { * @vbus: vbus 5V used by host mode * @edev: external connector used to detect vbus and iddig changes * @vbus_nb: notifier for vbus detection -* @vbus_nb: notifier for iddig(idpin) detection +* @vbus_work : work of vbus detection notifier, used to avoid sleep in +* notifier callback which is atomic context +* @vbus_event : event of vbus detecion notifier +* @id_nb : notifier for iddig(idpin) detection +* @id_work : work of iddig detection notifier +* @id_event : event of iddig detecion notifier * @is_u3_drd: whether port0 supports usb3.0 dual-role device or not * @manual_drd_enabled: it's true when supports dual-role device by debugfs * to switch host/device modes depending on user input. @@ -205,7 +210,11 @@ struct otg_switch_mtk { struct regulator *vbus; struct extcon_dev *edev; struct notifier_block vbus_nb; + struct work_struct vbus_work; + unsigned long vbus_event; struct notifier_block id_nb; + struct work_struct id_work; + unsigned long id_event; bool is_u3_drd; bool manual_drd_enabled; }; diff --git a/drivers/usb/mtu3/mtu3_dr.c b/drivers/usb/mtu3/mtu3_dr.c index 80083e0..8c3bbf7 100644 --- a/drivers/usb/mtu3/mtu3_dr.c +++ b/drivers/usb/mtu3/mtu3_dr.c @@ -174,16 +174,40 @@ static void ssusb_set_mailbox(struct otg_switch_mtk *otg_sx, } } -static int ssusb_id_notifier(struct notifier_block *nb, - unsigned long event, void *ptr) +static void ssusb_id_work(struct work_struct *work) { struct otg_switch_mtk *otg_sx = - container_of(nb, struct otg_switch_mtk, id_nb); + container_of(work, struct otg_switch_mtk, id_work); - if (event) + if (otg_sx->id_event) ssusb_set_mailbox(otg_sx, MTU3_ID_GROUND); else ssusb_set_mailbox(otg_sx, MTU3_ID_FLOAT); +} + +static void ssusb_vbus_work(struct work_struct *work) +{ + struct otg_switch_mtk *otg_sx = + container_of(work, struct otg_switch_mtk, vbus_work); + + if (otg_sx->vbus_event) + ssusb_set_mailbox(otg_sx, MTU3_VBUS_VALID); + else + ssusb_set_mailbox(otg_sx, MTU3_VBUS_OFF); +} + +/* + * @ssusb_id_notifier is called in atomic context, but @ssusb_set_mailbox + * may sleep, so use work queue here + */ +static int ssusb_id_notifier(struct notifier_block *nb, + unsigned long event, void *ptr) +{ + struct otg_switch_mtk *otg_sx = + container_of(nb, struct otg_switch_mtk, id_nb); + + otg_sx->id_event = event; + schedule_work(&otg_sx->id_work); return NOTIFY_DONE; } @@ -194,10 +218,8 @@ static int ssusb_vbus_notifier(struct notifier_block *nb, struct otg_switch_mtk *otg_sx = container_of(nb, struct otg_switch_mtk, vbus_nb); - if (event) - ssusb_set_mailbox(otg_sx, MTU3_VBUS_VALID); - else - ssusb_set_mailbox(otg_sx, MTU3_VBUS_OFF); + otg_sx->vbus_event = event; + schedule_work(&otg_sx->vbus_work); return NOTIFY_DONE; } @@ -398,6 +420,9 @@ int ssusb_otg_switch_init(struct ssusb_mtk *ssusb) { struct otg_switch_mtk *otg_sx = &ssusb->otg_switch; + INIT_WORK(&otg_sx->id_work, ssusb_id_work); + INIT_WORK(&otg_sx->vbus_work, ssusb_vbus_work); + if (otg_sx->manual_drd_enabled) ssusb_debugfs_init(ssusb); else @@ -412,4 +437,7 @@ void ssusb_otg_switch_exit(struct ssusb_mtk *ssusb) if (otg_sx->manual_drd_enabled) ssusb_debugfs_exit(ssusb); + + cancel_work_sync(&otg_sx->id_work); + cancel_work_sync(&otg_sx->vbus_work); } -- cgit v1.1 From c97a8cc17f4472d85f889230ea6bac5aa8c53560 Mon Sep 17 00:00:00 2001 From: Adam Thomson Date: Tue, 22 May 2018 16:16:24 +0100 Subject: typec: tcpm: Provide fwnode pointer as part of psy_cfg For supply registration, provide fwnode pointer of the port device, via the power_supply_config structure, to allow other psy drivers to add us as a supplier. At present this only applies to DT based platforms using the 'power-supplies' DT property, but in the future should also work for ACPI platforms when the relevant support is added to the power_supply core. Signed-off-by: Adam Thomson Suggested-by: Heikki Krogerus Reviewed-by: Heikki Krogerus Reviewed-by: Guenter Roeck Signed-off-by: Greg Kroah-Hartman --- drivers/usb/typec/tcpm.c | 2 ++ 1 file changed, 2 insertions(+) (limited to 'drivers/usb') diff --git a/drivers/usb/typec/tcpm.c b/drivers/usb/typec/tcpm.c index 72996cc..0ccd2ce 100644 --- a/drivers/usb/typec/tcpm.c +++ b/drivers/usb/typec/tcpm.c @@ -14,6 +14,7 @@ #include #include #include +#include #include #include #include @@ -4500,6 +4501,7 @@ static int devm_tcpm_psy_register(struct tcpm_port *port) char *psy_name; psy_cfg.drv_data = port; + psy_cfg.fwnode = dev_fwnode(port->dev); psy_name = devm_kzalloc(port->dev, psy_name_len, GFP_KERNEL); if (!psy_name) return -ENOMEM; -- cgit v1.1 From 4a014a7339f441b0851ce012f469c0fadac61c81 Mon Sep 17 00:00:00 2001 From: Yoshihiro Shimoda Date: Mon, 21 May 2018 20:18:07 +0900 Subject: usb: gadget: function: printer: avoid wrong list handling in printer_write() When printer_write() calls usb_ep_queue(), a udc driver (e.g. renesas_usbhs driver) may call usb_gadget_giveback_request() in the udc .queue ops immediately. Then, printer_write() calls list_add(&req->list, &dev->tx_reqs_active) wrongly. After that, if we do unbind the printer driver, WARN_ON() happens in printer_func_unbind() because the list entry is not removed. So, this patch moves list_add(&req->list, &dev->tx_reqs_active) calling before usb_ep_queue(). Signed-off-by: Yoshihiro Shimoda Acked-by: Felipe Balbi Cc: stable Signed-off-by: Greg Kroah-Hartman --- drivers/usb/gadget/function/f_printer.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) (limited to 'drivers/usb') diff --git a/drivers/usb/gadget/function/f_printer.c b/drivers/usb/gadget/function/f_printer.c index d359efe..9c7ed25 100644 --- a/drivers/usb/gadget/function/f_printer.c +++ b/drivers/usb/gadget/function/f_printer.c @@ -631,19 +631,19 @@ printer_write(struct file *fd, const char __user *buf, size_t len, loff_t *ptr) return -EAGAIN; } + list_add(&req->list, &dev->tx_reqs_active); + /* here, we unlock, and only unlock, to avoid deadlock. */ spin_unlock(&dev->lock); value = usb_ep_queue(dev->in_ep, req, GFP_ATOMIC); spin_lock(&dev->lock); if (value) { + list_del(&req->list); list_add(&req->list, &dev->tx_reqs); spin_unlock_irqrestore(&dev->lock, flags); mutex_unlock(&dev->lock_printer_io); return -EAGAIN; } - - list_add(&req->list, &dev->tx_reqs_active); - } spin_unlock_irqrestore(&dev->lock, flags); -- cgit v1.1 From a0d6ec88090d7b1b008429c44532a388e29bb1bd Mon Sep 17 00:00:00 2001 From: "Gustavo A. R. Silva" Date: Fri, 18 May 2018 20:13:42 -0500 Subject: usbip: vhci_sysfs: fix potential Spectre v1 pdev_nr and rhport can be controlled by user-space, hence leading to a potential exploitation of the Spectre variant 1 vulnerability. This issue was detected with the help of Smatch: drivers/usb/usbip/vhci_sysfs.c:238 detach_store() warn: potential spectre issue 'vhcis' drivers/usb/usbip/vhci_sysfs.c:328 attach_store() warn: potential spectre issue 'vhcis' drivers/usb/usbip/vhci_sysfs.c:338 attach_store() warn: potential spectre issue 'vhci->vhci_hcd_ss->vdev' drivers/usb/usbip/vhci_sysfs.c:340 attach_store() warn: potential spectre issue 'vhci->vhci_hcd_hs->vdev' Fix this by sanitizing pdev_nr and rhport before using them to index vhcis and vhci->vhci_hcd_ss->vdev respectively. Notice that given that speculation windows are large, the policy is to kill the speculation on the first load and not worry if it can be completed with a dependent load/store [1]. [1] https://marc.info/?l=linux-kernel&m=152449131114778&w=2 Cc: stable@vger.kernel.org Signed-off-by: Gustavo A. R. Silva Acked-by: Shuah Khan (Samsung OSG) Signed-off-by: Greg Kroah-Hartman --- drivers/usb/usbip/vhci_sysfs.c | 24 ++++++++++++++++-------- 1 file changed, 16 insertions(+), 8 deletions(-) (limited to 'drivers/usb') diff --git a/drivers/usb/usbip/vhci_sysfs.c b/drivers/usb/usbip/vhci_sysfs.c index 4880838..be37aec 100644 --- a/drivers/usb/usbip/vhci_sysfs.c +++ b/drivers/usb/usbip/vhci_sysfs.c @@ -10,6 +10,9 @@ #include #include +/* Hardening for Spectre-v1 */ +#include + #include "usbip_common.h" #include "vhci.h" @@ -205,16 +208,20 @@ static int vhci_port_disconnect(struct vhci_hcd *vhci_hcd, __u32 rhport) return 0; } -static int valid_port(__u32 pdev_nr, __u32 rhport) +static int valid_port(__u32 *pdev_nr, __u32 *rhport) { - if (pdev_nr >= vhci_num_controllers) { - pr_err("pdev %u\n", pdev_nr); + if (*pdev_nr >= vhci_num_controllers) { + pr_err("pdev %u\n", *pdev_nr); return 0; } - if (rhport >= VHCI_HC_PORTS) { - pr_err("rhport %u\n", rhport); + *pdev_nr = array_index_nospec(*pdev_nr, vhci_num_controllers); + + if (*rhport >= VHCI_HC_PORTS) { + pr_err("rhport %u\n", *rhport); return 0; } + *rhport = array_index_nospec(*rhport, VHCI_HC_PORTS); + return 1; } @@ -232,7 +239,7 @@ static ssize_t detach_store(struct device *dev, struct device_attribute *attr, pdev_nr = port_to_pdev_nr(port); rhport = port_to_rhport(port); - if (!valid_port(pdev_nr, rhport)) + if (!valid_port(&pdev_nr, &rhport)) return -EINVAL; hcd = platform_get_drvdata(vhcis[pdev_nr].pdev); @@ -258,7 +265,8 @@ static ssize_t detach_store(struct device *dev, struct device_attribute *attr, } static DEVICE_ATTR_WO(detach); -static int valid_args(__u32 pdev_nr, __u32 rhport, enum usb_device_speed speed) +static int valid_args(__u32 *pdev_nr, __u32 *rhport, + enum usb_device_speed speed) { if (!valid_port(pdev_nr, rhport)) { return 0; @@ -322,7 +330,7 @@ static ssize_t attach_store(struct device *dev, struct device_attribute *attr, sockfd, devid, speed); /* check received parameters */ - if (!valid_args(pdev_nr, rhport, speed)) + if (!valid_args(&pdev_nr, &rhport, speed)) return -EINVAL; hcd = platform_get_drvdata(vhcis[pdev_nr].pdev); -- cgit v1.1 From 74789aed881417b56e2db9ab736ea83191d0100c Mon Sep 17 00:00:00 2001 From: Heikki Krogerus Date: Mon, 21 May 2018 15:20:47 +0300 Subject: usb: typec: Fix htmldocs warning Fix htmldocs warning: drivers/usb/typec/mux.c:186: warning: Function parameter or member 'mux' not described in 'typec_mux_unregister' Reported-by: kbuild test robot Fixes: bdecb33af34f ("usb: typec: API for controlling USB Type-C Multiplexers") Signed-off-by: Heikki Krogerus Signed-off-by: Greg Kroah-Hartman --- drivers/usb/typec/mux.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers/usb') diff --git a/drivers/usb/typec/mux.c b/drivers/usb/typec/mux.c index f89093b..9d8330e 100644 --- a/drivers/usb/typec/mux.c +++ b/drivers/usb/typec/mux.c @@ -178,7 +178,7 @@ EXPORT_SYMBOL_GPL(typec_mux_register); /** * typec_mux_unregister - Unregister Multiplexer Switch - * @sw: USB Type-C Connector Multiplexer/DeMultiplexer + * @mux: USB Type-C Connector Multiplexer/DeMultiplexer * * Unregister mux that was registered with typec_mux_register(). */ -- cgit v1.1 From 35fcf02f801ba5358316113d0b94c541b9e39e84 Mon Sep 17 00:00:00 2001 From: Heikki Krogerus Date: Thu, 24 May 2018 11:18:24 +0300 Subject: usb: roles: intel_xhci: Always allow user control Trying to determine the USB port type with this mux is very difficult. To simplify the situation, always allow user control, even if the port is USB Type-C port. Reviewed-by: Hans de Goede Signed-off-by: Heikki Krogerus Signed-off-by: Greg Kroah-Hartman --- drivers/usb/roles/intel-xhci-usb-role-switch.c | 23 ++--------------------- 1 file changed, 2 insertions(+), 21 deletions(-) (limited to 'drivers/usb') diff --git a/drivers/usb/roles/intel-xhci-usb-role-switch.c b/drivers/usb/roles/intel-xhci-usb-role-switch.c index 2810212..6e922b50b 100644 --- a/drivers/usb/roles/intel-xhci-usb-role-switch.c +++ b/drivers/usb/roles/intel-xhci-usb-role-switch.c @@ -38,20 +38,6 @@ struct intel_xhci_usb_data { void __iomem *base; }; -struct intel_xhci_acpi_match { - const char *hid; - int hrv; -}; - -/* - * ACPI IDs for PMICs which do not support separate data and power role - * detection (USB ACA detection for micro USB OTG), we allow userspace to - * change the role manually on these. - */ -static const struct intel_xhci_acpi_match allow_userspace_ctrl_ids[] = { - { "INT33F4", 3 }, /* X-Powers AXP288 PMIC */ -}; - static int intel_xhci_usb_set_role(struct device *dev, enum usb_role role) { struct intel_xhci_usb_data *data = dev_get_drvdata(dev); @@ -127,9 +113,10 @@ static enum usb_role intel_xhci_usb_get_role(struct device *dev) return role; } -static struct usb_role_switch_desc sw_desc = { +static const struct usb_role_switch_desc sw_desc = { .set = intel_xhci_usb_set_role, .get = intel_xhci_usb_get_role, + .allow_userspace_control = true, }; static int intel_xhci_usb_probe(struct platform_device *pdev) @@ -137,7 +124,6 @@ static int intel_xhci_usb_probe(struct platform_device *pdev) struct device *dev = &pdev->dev; struct intel_xhci_usb_data *data; struct resource *res; - int i; data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL); if (!data) @@ -150,11 +136,6 @@ static int intel_xhci_usb_probe(struct platform_device *pdev) if (!data->base) return -ENOMEM; - for (i = 0; i < ARRAY_SIZE(allow_userspace_ctrl_ids); i++) - if (acpi_dev_present(allow_userspace_ctrl_ids[i].hid, "1", - allow_userspace_ctrl_ids[i].hrv)) - sw_desc.allow_userspace_control = true; - platform_set_drvdata(pdev, data); data->role_sw = usb_role_switch_register(dev, &sw_desc); -- cgit v1.1 From c9359f41620764822842d0c25908efdc019833f3 Mon Sep 17 00:00:00 2001 From: Heikki Krogerus Date: Thu, 24 May 2018 11:18:26 +0300 Subject: usb: typec: fusb302: Fix debugfs issue Removing the "fusb302" debugfs directory when unloading the driver. That allows the driver to be loaded more then one time. The directory will not get actually removed until it is empty, so only after the last instance has been removed. This fixes an issue where the driver can't be re-loaded if it has been unloaded as the "fusb302" debugfs directory already exists. Fixes: 76f0c53d08b9 ("usb: typec: fusb302: Move out of staging") Signed-off-by: Heikki Krogerus Reviewed-by: Guenter Roeck Signed-off-by: Greg Kroah-Hartman --- drivers/usb/typec/fusb302/fusb302.c | 1 + 1 file changed, 1 insertion(+) (limited to 'drivers/usb') diff --git a/drivers/usb/typec/fusb302/fusb302.c b/drivers/usb/typec/fusb302/fusb302.c index eba6bb8..9c1eba9 100644 --- a/drivers/usb/typec/fusb302/fusb302.c +++ b/drivers/usb/typec/fusb302/fusb302.c @@ -234,6 +234,7 @@ static int fusb302_debugfs_init(struct fusb302_chip *chip) static void fusb302_debugfs_exit(struct fusb302_chip *chip) { debugfs_remove(chip->dentry); + debugfs_remove(rootdir); } #else -- cgit v1.1 From cb296846860531defe93ebf75221e280970907f0 Mon Sep 17 00:00:00 2001 From: Heikki Krogerus Date: Thu, 24 May 2018 11:18:27 +0300 Subject: usb: roles: intel_xhci: Enable runtime PM This fixes an issue where the mux does not get configured when the parent device is suspended. The registers for this mux are mapped to the parent device MMIO (usually xHCI PCI device), so in order for the driver to be able to program the registers, the parent device must be resumed. Reported-by: Sathyanarayanan Kuppuswamy Fixes: f6fb9ec02be1 ("usb: roles: Add Intel xHCI USB role switch driver") Signed-off-by: Heikki Krogerus Signed-off-by: Greg Kroah-Hartman --- drivers/usb/roles/intel-xhci-usb-role-switch.c | 14 +++++++++++++- 1 file changed, 13 insertions(+), 1 deletion(-) (limited to 'drivers/usb') diff --git a/drivers/usb/roles/intel-xhci-usb-role-switch.c b/drivers/usb/roles/intel-xhci-usb-role-switch.c index 6e922b50b..1fb3dd0 100644 --- a/drivers/usb/roles/intel-xhci-usb-role-switch.c +++ b/drivers/usb/roles/intel-xhci-usb-role-switch.c @@ -18,6 +18,7 @@ #include #include #include +#include #include /* register definition */ @@ -56,6 +57,8 @@ static int intel_xhci_usb_set_role(struct device *dev, enum usb_role role) return -EIO; } + pm_runtime_get_sync(dev); + /* Set idpin value as requested */ val = readl(data->base + DUAL_ROLE_CFG0); switch (role) { @@ -84,13 +87,17 @@ static int intel_xhci_usb_set_role(struct device *dev, enum usb_role role) /* Polling on CFG1 register to confirm mode switch.*/ do { val = readl(data->base + DUAL_ROLE_CFG1); - if (!!(val & HOST_MODE) == (role == USB_ROLE_HOST)) + if (!!(val & HOST_MODE) == (role == USB_ROLE_HOST)) { + pm_runtime_put(dev); return 0; + } /* Interval for polling is set to about 5 - 10 ms */ usleep_range(5000, 10000); } while (time_before(jiffies, timeout)); + pm_runtime_put(dev); + dev_warn(dev, "Timeout waiting for role-switch\n"); return -ETIMEDOUT; } @@ -101,7 +108,9 @@ static enum usb_role intel_xhci_usb_get_role(struct device *dev) enum usb_role role; u32 val; + pm_runtime_get_sync(dev); val = readl(data->base + DUAL_ROLE_CFG0); + pm_runtime_put(dev); if (!(val & SW_IDPIN)) role = USB_ROLE_HOST; @@ -142,6 +151,9 @@ static int intel_xhci_usb_probe(struct platform_device *pdev) if (IS_ERR(data->role_sw)) return PTR_ERR(data->role_sw); + pm_runtime_set_active(dev); + pm_runtime_enable(dev); + return 0; } -- cgit v1.1 From 05826ff135ee083d28c006fbde6e810f17437166 Mon Sep 17 00:00:00 2001 From: Heikki Krogerus Date: Thu, 24 May 2018 13:49:52 +0300 Subject: usb: typec: wcove: Remove dependency on HW FSM The USB Type-C PHY in Intel WhiskeyCove PMIC has build-in USB Type-C state machine which we were relying on to configure the CC lines correctly. This patch removes that dependency and configures the CC line according to commands from the port manager (tcpm.c) in wcove_set_cc(). This fixes an issue where USB devices attached to the USB Type-C port do not get enumerated. When acting as source/host, the HW FSM sometimes fails to configure the PHY correctly. Fixes: 3c4fb9f16921 ("usb: typec: wcove: start using tcpm for USB PD support") Cc: stable@vger.kernel.org Signed-off-by: Heikki Krogerus Signed-off-by: Greg Kroah-Hartman --- drivers/usb/typec/typec_wcove.c | 30 ++++++++++++++++++++++++++++-- 1 file changed, 28 insertions(+), 2 deletions(-) (limited to 'drivers/usb') diff --git a/drivers/usb/typec/typec_wcove.c b/drivers/usb/typec/typec_wcove.c index 39cff11..423208e 100644 --- a/drivers/usb/typec/typec_wcove.c +++ b/drivers/usb/typec/typec_wcove.c @@ -202,6 +202,10 @@ static int wcove_init(struct tcpc_dev *tcpc) struct wcove_typec *wcove = tcpc_to_wcove(tcpc); int ret; + ret = regmap_write(wcove->regmap, USBC_CONTROL1, 0); + if (ret) + return ret; + /* Unmask everything */ ret = regmap_write(wcove->regmap, USBC_IRQMASK1, 0); if (ret) @@ -285,8 +289,30 @@ static int wcove_get_cc(struct tcpc_dev *tcpc, enum typec_cc_status *cc1, static int wcove_set_cc(struct tcpc_dev *tcpc, enum typec_cc_status cc) { - /* XXX: Relying on the HW FSM to configure things correctly for now */ - return 0; + struct wcove_typec *wcove = tcpc_to_wcove(tcpc); + unsigned int ctrl; + + switch (cc) { + case TYPEC_CC_RD: + ctrl = USBC_CONTROL1_MODE_SNK; + break; + case TYPEC_CC_RP_DEF: + ctrl = USBC_CONTROL1_CURSRC_UA_80 | USBC_CONTROL1_MODE_SRC; + break; + case TYPEC_CC_RP_1_5: + ctrl = USBC_CONTROL1_CURSRC_UA_180 | USBC_CONTROL1_MODE_SRC; + break; + case TYPEC_CC_RP_3_0: + ctrl = USBC_CONTROL1_CURSRC_UA_330 | USBC_CONTROL1_MODE_SRC; + break; + case TYPEC_CC_OPEN: + ctrl = 0; + break; + default: + return -EINVAL; + } + + return regmap_write(wcove->regmap, USBC_CONTROL1, ctrl); } static int wcove_set_polarity(struct tcpc_dev *tcpc, enum typec_cc_polarity pol) -- cgit v1.1 From 8c4e97ddfe73a0958bb0abf7e6a3bc4cc3e04936 Mon Sep 17 00:00:00 2001 From: Alexander Kappner Date: Fri, 18 May 2018 21:50:15 -0700 Subject: usb-storage: Add support for FL_ALWAYS_SYNC flag in the UAS driver The ALWAYS_SYNC flag is currently honored by the usb-storage driver but not UAS and is required to work around devices that become unstable upon being queried for cache. This code is taken straight from: drivers/usb/storage/scsiglue.c:284 Signed-off-by: Alexander Kappner Acked-by: Alan Stern Cc: stable Acked-by: Oliver Neukum Signed-off-by: Greg Kroah-Hartman --- drivers/usb/storage/uas.c | 6 ++++++ 1 file changed, 6 insertions(+) (limited to 'drivers/usb') diff --git a/drivers/usb/storage/uas.c b/drivers/usb/storage/uas.c index 6034c39..9e9de54 100644 --- a/drivers/usb/storage/uas.c +++ b/drivers/usb/storage/uas.c @@ -836,6 +836,12 @@ static int uas_slave_configure(struct scsi_device *sdev) if (devinfo->flags & US_FL_BROKEN_FUA) sdev->broken_fua = 1; + /* UAS also needs to support FL_ALWAYS_SYNC */ + if (devinfo->flags & US_FL_ALWAYS_SYNC) { + sdev->skip_ms_page_3f = 1; + sdev->skip_ms_page_8 = 1; + sdev->wce_default_on = 1; + } scsi_change_queue_depth(sdev, devinfo->qdepth - 2); return 0; } -- cgit v1.1 From ca7d9515d0e6825351ce106066cea1f60e40b1c8 Mon Sep 17 00:00:00 2001 From: Alexander Kappner Date: Fri, 18 May 2018 21:50:16 -0700 Subject: usb-storage: Add compatibility quirk flags for G-Technologies G-Drive The "G-Drive" (sold by G-Technology) external USB 3.0 drive hangs on write access under UAS and usb-storage: [ 136.079121] sd 15:0:0:0: [sdi] tag#0 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE [ 136.079144] sd 15:0:0:0: [sdi] tag#0 Sense Key : Illegal Request [current] [ 136.079152] sd 15:0:0:0: [sdi] tag#0 Add. Sense: Invalid field in cdb [ 136.079176] sd 15:0:0:0: [sdi] tag#0 CDB: Write(16) 8a 08 00 00 00 00 00 00 00 00 00 00 00 08 00 00 [ 136.079180] print_req_error: critical target error, dev sdi, sector 0 [ 136.079183] Buffer I/O error on dev sdi, logical block 0, lost sync page write [ 136.173148] EXT4-fs (sdi): mounted filesystem with ordered data mode. Opts: (null) [ 140.583998] sd 15:0:0:0: [sdi] tag#0 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE [ 140.584010] sd 15:0:0:0: [sdi] tag#0 Sense Key : Illegal Request [current] [ 140.584016] sd 15:0:0:0: [sdi] tag#0 Add. Sense: Invalid field in cdb [ 140.584022] sd 15:0:0:0: [sdi] tag#0 CDB: Write(16) 8a 08 00 00 00 00 e8 c4 00 18 00 00 00 08 00 00 [ 140.584025] print_req_error: critical target error, dev sdi, sector 3905159192 [ 140.584044] print_req_error: critical target error, dev sdi, sector 3905159192 [ 140.584052] Aborting journal on device sdi-8. The proposed patch adds compatibility quirks. Because the drive requires two quirks (one to work with UAS, and another to work with usb-storage), adding this under unusual_devs.h and not just unusual_uas.h so kernels compiled without UAS receive the quirk. With the patch, the drive works reliably on UAS and usb- storage. (tested on NEC Corporation uPD720200 USB 3.0 host controller). Signed-off-by: Alexander Kappner Acked-by: Alan Stern Cc: stable Signed-off-by: Greg Kroah-Hartman --- drivers/usb/storage/unusual_devs.h | 9 +++++++++ drivers/usb/storage/unusual_uas.h | 9 +++++++++ 2 files changed, 18 insertions(+) (limited to 'drivers/usb') diff --git a/drivers/usb/storage/unusual_devs.h b/drivers/usb/storage/unusual_devs.h index 747d3a9..22fcfcc 100644 --- a/drivers/usb/storage/unusual_devs.h +++ b/drivers/usb/storage/unusual_devs.h @@ -2321,6 +2321,15 @@ UNUSUAL_DEV( 0x4146, 0xba01, 0x0100, 0x0100, "Micro Mini 1GB", USB_SC_DEVICE, USB_PR_DEVICE, NULL, US_FL_NOT_LOCKABLE ), +/* "G-DRIVE" external HDD hangs on write without these. + * Patch submitted by Alexander Kappner + */ +UNUSUAL_DEV(0x4971, 0x8024, 0x0000, 0x9999, + "SimpleTech", + "External HDD", + USB_SC_DEVICE, USB_PR_DEVICE, NULL, + US_FL_ALWAYS_SYNC), + /* * Nick Bowler * SCSI stack spams (otherwise harmless) error messages. diff --git a/drivers/usb/storage/unusual_uas.h b/drivers/usb/storage/unusual_uas.h index 38434d8..d0bdebd 100644 --- a/drivers/usb/storage/unusual_uas.h +++ b/drivers/usb/storage/unusual_uas.h @@ -107,3 +107,12 @@ UNUSUAL_DEV(0x4971, 0x8017, 0x0000, 0x9999, "External HDD", USB_SC_DEVICE, USB_PR_DEVICE, NULL, US_FL_NO_REPORT_OPCODES), + +/* "G-DRIVE" external HDD hangs on write without these. + * Patch submitted by Alexander Kappner + */ +UNUSUAL_DEV(0x4971, 0x8024, 0x0000, 0x9999, + "SimpleTech", + "External HDD", + USB_SC_DEVICE, USB_PR_DEVICE, NULL, + US_FL_ALWAYS_SYNC), -- cgit v1.1 From f468b55cb72ddd69b08ecfc791046a6db5fde7b0 Mon Sep 17 00:00:00 2001 From: Jon Hunter Date: Wed, 16 May 2018 14:48:53 +0100 Subject: usb: xhci: tegra: Prepare for adding runtime PM support When adding runtime PM support to the Tegra XHCI driver, it is desirable to move the function calls to enable the clocks, regulators and PHY from the tegra_xusb_probe into the runtime PM handlers. Currently, the clocks, regulators and PHY are all enabled before we call usb_create_hcd() in tegra_xusb_probe(), however, we cannot call pm_runtime_get_sync() at this point because the platform device data is not yet initialised. Fortunately, the function usb_create_hcd() can be called before we enable the clocks, regulators and PHY and so prepare for adding runtime PM support, by moving the call to usb_create_hcd() before we enable the hardware. Signed-off-by: Jon Hunter Acked-by: Thierry Reding Signed-off-by: Greg Kroah-Hartman --- drivers/usb/host/xhci-tegra.c | 34 +++++++++++++++++----------------- 1 file changed, 17 insertions(+), 17 deletions(-) (limited to 'drivers/usb') diff --git a/drivers/usb/host/xhci-tegra.c b/drivers/usb/host/xhci-tegra.c index 2c076ea..02b0b24 100644 --- a/drivers/usb/host/xhci-tegra.c +++ b/drivers/usb/host/xhci-tegra.c @@ -1054,10 +1054,23 @@ static int tegra_xusb_probe(struct platform_device *pdev) } } + tegra->hcd = usb_create_hcd(&tegra_xhci_hc_driver, &pdev->dev, + dev_name(&pdev->dev)); + if (!tegra->hcd) { + err = -ENOMEM; + goto put_padctl; + } + + /* + * This must happen after usb_create_hcd(), because usb_create_hcd() + * will overwrite the drvdata of the device with the hcd it creates. + */ + platform_set_drvdata(pdev, tegra); + err = tegra_xusb_clk_enable(tegra); if (err) { dev_err(&pdev->dev, "failed to enable clocks: %d\n", err); - goto put_padctl; + goto put_usb2; } err = regulator_bulk_enable(tegra->soc->num_supplies, tegra->supplies); @@ -1080,19 +1093,6 @@ static int tegra_xusb_probe(struct platform_device *pdev) goto disable_phy; } - tegra->hcd = usb_create_hcd(&tegra_xhci_hc_driver, &pdev->dev, - dev_name(&pdev->dev)); - if (!tegra->hcd) { - err = -ENOMEM; - goto disable_phy; - } - - /* - * This must happen after usb_create_hcd(), because usb_create_hcd() - * will overwrite the drvdata of the device with the hcd it creates. - */ - platform_set_drvdata(pdev, tegra); - tegra->hcd->regs = tegra->regs; tegra->hcd->rsrc_start = regs->start; tegra->hcd->rsrc_len = resource_size(regs); @@ -1100,7 +1100,7 @@ static int tegra_xusb_probe(struct platform_device *pdev) err = usb_add_hcd(tegra->hcd, tegra->xhci_irq, IRQF_SHARED); if (err < 0) { dev_err(&pdev->dev, "failed to add USB HCD: %d\n", err); - goto put_usb2; + goto disable_phy; } device_wakeup_enable(tegra->hcd->self.controller); @@ -1155,14 +1155,14 @@ put_usb3: usb_put_hcd(xhci->shared_hcd); remove_usb2: usb_remove_hcd(tegra->hcd); -put_usb2: - usb_put_hcd(tegra->hcd); disable_phy: tegra_xusb_phy_disable(tegra); disable_regulator: regulator_bulk_disable(tegra->soc->num_supplies, tegra->supplies); disable_clk: tegra_xusb_clk_disable(tegra); +put_usb2: + usb_put_hcd(tegra->hcd); put_padctl: tegra_xusb_padctl_put(tegra->padctl); return err; -- cgit v1.1 From ee9e5f4c78259d25dae0c813d771de6a4a203ddc Mon Sep 17 00:00:00 2001 From: Jon Hunter Date: Wed, 16 May 2018 14:48:54 +0100 Subject: usb: xhci: tegra: Add runtime PM support Add runtime PM support to the Tegra XHCI driver and move the function calls to enable/disable the clocks, regulators and PHY into the runtime PM callbacks. Signed-off-by: Jon Hunter Acked-by: Thierry Reding Signed-off-by: Greg Kroah-Hartman --- drivers/usb/host/xhci-tegra.c | 88 ++++++++++++++++++++++++++++++------------- 1 file changed, 62 insertions(+), 26 deletions(-) (limited to 'drivers/usb') diff --git a/drivers/usb/host/xhci-tegra.c b/drivers/usb/host/xhci-tegra.c index 02b0b24..437e080 100644 --- a/drivers/usb/host/xhci-tegra.c +++ b/drivers/usb/host/xhci-tegra.c @@ -18,6 +18,7 @@ #include #include #include +#include #include #include #include @@ -761,6 +762,49 @@ static void tegra_xusb_phy_disable(struct tegra_xusb *tegra) } } +static int tegra_xusb_runtime_suspend(struct device *dev) +{ + struct tegra_xusb *tegra = dev_get_drvdata(dev); + + tegra_xusb_phy_disable(tegra); + regulator_bulk_disable(tegra->soc->num_supplies, tegra->supplies); + tegra_xusb_clk_disable(tegra); + + return 0; +} + +static int tegra_xusb_runtime_resume(struct device *dev) +{ + struct tegra_xusb *tegra = dev_get_drvdata(dev); + int err; + + err = tegra_xusb_clk_enable(tegra); + if (err) { + dev_err(dev, "failed to enable clocks: %d\n", err); + return err; + } + + err = regulator_bulk_enable(tegra->soc->num_supplies, tegra->supplies); + if (err) { + dev_err(dev, "failed to enable regulators: %d\n", err); + goto disable_clk; + } + + err = tegra_xusb_phy_enable(tegra); + if (err < 0) { + dev_err(dev, "failed to enable PHYs: %d\n", err); + goto disable_regulator; + } + + return 0; + +disable_regulator: + regulator_bulk_disable(tegra->soc->num_supplies, tegra->supplies); +disable_clk: + tegra_xusb_clk_disable(tegra); + return err; +} + static int tegra_xusb_load_firmware(struct tegra_xusb *tegra) { unsigned int code_tag_blocks, code_size_blocks, code_blocks; @@ -1067,22 +1111,15 @@ static int tegra_xusb_probe(struct platform_device *pdev) */ platform_set_drvdata(pdev, tegra); - err = tegra_xusb_clk_enable(tegra); - if (err) { - dev_err(&pdev->dev, "failed to enable clocks: %d\n", err); - goto put_usb2; - } - - err = regulator_bulk_enable(tegra->soc->num_supplies, tegra->supplies); - if (err) { - dev_err(&pdev->dev, "failed to enable regulators: %d\n", err); - goto disable_clk; - } + pm_runtime_enable(&pdev->dev); + if (!pm_runtime_enabled(&pdev->dev)) + err = pm_runtime_get_sync(&pdev->dev); + else + err = tegra_xusb_runtime_resume(&pdev->dev); - err = tegra_xusb_phy_enable(tegra); if (err < 0) { - dev_err(&pdev->dev, "failed to enable PHYs: %d\n", err); - goto disable_regulator; + dev_err(&pdev->dev, "failed to enable device: %d\n", err); + goto disable_rpm; } tegra_xusb_ipfs_config(tegra, regs); @@ -1090,7 +1127,7 @@ static int tegra_xusb_probe(struct platform_device *pdev) err = tegra_xusb_load_firmware(tegra); if (err < 0) { dev_err(&pdev->dev, "failed to load firmware: %d\n", err); - goto disable_phy; + goto put_rpm; } tegra->hcd->regs = tegra->regs; @@ -1100,7 +1137,7 @@ static int tegra_xusb_probe(struct platform_device *pdev) err = usb_add_hcd(tegra->hcd, tegra->xhci_irq, IRQF_SHARED); if (err < 0) { dev_err(&pdev->dev, "failed to add USB HCD: %d\n", err); - goto disable_phy; + goto put_rpm; } device_wakeup_enable(tegra->hcd->self.controller); @@ -1155,13 +1192,11 @@ put_usb3: usb_put_hcd(xhci->shared_hcd); remove_usb2: usb_remove_hcd(tegra->hcd); -disable_phy: - tegra_xusb_phy_disable(tegra); -disable_regulator: - regulator_bulk_disable(tegra->soc->num_supplies, tegra->supplies); -disable_clk: - tegra_xusb_clk_disable(tegra); -put_usb2: +put_rpm: + if (!pm_runtime_status_suspended(&pdev->dev)) + tegra_xusb_runtime_suspend(&pdev->dev); +disable_rpm: + pm_runtime_disable(&pdev->dev); usb_put_hcd(tegra->hcd); put_padctl: tegra_xusb_padctl_put(tegra->padctl); @@ -1181,9 +1216,8 @@ static int tegra_xusb_remove(struct platform_device *pdev) dma_free_coherent(&pdev->dev, tegra->fw.size, tegra->fw.virt, tegra->fw.phys); - tegra_xusb_phy_disable(tegra); - regulator_bulk_disable(tegra->soc->num_supplies, tegra->supplies); - tegra_xusb_clk_disable(tegra); + pm_runtime_put_sync(&pdev->dev); + pm_runtime_disable(&pdev->dev); tegra_xusb_padctl_put(tegra->padctl); @@ -1211,6 +1245,8 @@ static int tegra_xusb_resume(struct device *dev) #endif static const struct dev_pm_ops tegra_xusb_pm_ops = { + SET_RUNTIME_PM_OPS(tegra_xusb_runtime_suspend, + tegra_xusb_runtime_resume, NULL) SET_SYSTEM_SLEEP_PM_OPS(tegra_xusb_suspend, tegra_xusb_resume) }; -- cgit v1.1 From 58c38116c6cc5bcb6d952ca72111a7a15d4604a2 Mon Sep 17 00:00:00 2001 From: Jon Hunter Date: Wed, 16 May 2018 14:48:55 +0100 Subject: usb: xhci: tegra: Add support for managing powergates The Tegra XHCI controller requires that the XUSBA (for superspeed) and XUSBC (for host) power-domains are enabled. Commit 8df127456f29 ("soc/tegra: pmc: Enable XUSB partitions on boot") was added to force on these power-domains if the XHCI driver is enabled while proper power-domain support is added, to ensure the device did not hang on boot. However, rather than forcing on these power-domains in the PMC driver we can use the legacy Tegra powergate APIs to turn on these power-domains during the probe of the Tegra XHCI driver. In the near future we plan to move the Tegra XHCI driver to use the generic PM domain framework for power-domains and so to prepare for this only use the legacy Tegra powergate API if there is not PM domain associated with device (ie. dev.pm_domain is NULL). Please note that in the future the superspeed and host resets will be handled by the generic PM domain provider and so these are only these are only needed in the case where there is no generic PM domain. Signed-off-by: Jon Hunter Acked-by: Thierry Reding Signed-off-by: Greg Kroah-Hartman --- drivers/usb/host/xhci-tegra.c | 68 +++++++++++++++++++++++++++++++------------ 1 file changed, 49 insertions(+), 19 deletions(-) (limited to 'drivers/usb') diff --git a/drivers/usb/host/xhci-tegra.c b/drivers/usb/host/xhci-tegra.c index 437e080..c78fc29 100644 --- a/drivers/usb/host/xhci-tegra.c +++ b/drivers/usb/host/xhci-tegra.c @@ -22,6 +22,7 @@ #include #include #include +#include #include "xhci.h" @@ -974,20 +975,6 @@ static int tegra_xusb_probe(struct platform_device *pdev) if (IS_ERR(tegra->padctl)) return PTR_ERR(tegra->padctl); - tegra->host_rst = devm_reset_control_get(&pdev->dev, "xusb_host"); - if (IS_ERR(tegra->host_rst)) { - err = PTR_ERR(tegra->host_rst); - dev_err(&pdev->dev, "failed to get xusb_host reset: %d\n", err); - goto put_padctl; - } - - tegra->ss_rst = devm_reset_control_get(&pdev->dev, "xusb_ss"); - if (IS_ERR(tegra->ss_rst)) { - err = PTR_ERR(tegra->ss_rst); - dev_err(&pdev->dev, "failed to get xusb_ss reset: %d\n", err); - goto put_padctl; - } - tegra->host_clk = devm_clk_get(&pdev->dev, "xusb_host"); if (IS_ERR(tegra->host_clk)) { err = PTR_ERR(tegra->host_clk); @@ -1051,11 +1038,48 @@ static int tegra_xusb_probe(struct platform_device *pdev) goto put_padctl; } + if (!pdev->dev.pm_domain) { + tegra->host_rst = devm_reset_control_get(&pdev->dev, + "xusb_host"); + if (IS_ERR(tegra->host_rst)) { + err = PTR_ERR(tegra->host_rst); + dev_err(&pdev->dev, + "failed to get xusb_host reset: %d\n", err); + goto put_padctl; + } + + tegra->ss_rst = devm_reset_control_get(&pdev->dev, "xusb_ss"); + if (IS_ERR(tegra->ss_rst)) { + err = PTR_ERR(tegra->ss_rst); + dev_err(&pdev->dev, "failed to get xusb_ss reset: %d\n", + err); + goto put_padctl; + } + + err = tegra_powergate_sequence_power_up(TEGRA_POWERGATE_XUSBA, + tegra->ss_clk, + tegra->ss_rst); + if (err) { + dev_err(&pdev->dev, + "failed to enable XUSBA domain: %d\n", err); + goto put_padctl; + } + + err = tegra_powergate_sequence_power_up(TEGRA_POWERGATE_XUSBC, + tegra->host_clk, + tegra->host_rst); + if (err) { + dev_err(&pdev->dev, + "failed to enable XUSBC domain: %d\n", err); + goto disable_xusba; + } + } + tegra->supplies = devm_kcalloc(&pdev->dev, tegra->soc->num_supplies, sizeof(*tegra->supplies), GFP_KERNEL); if (!tegra->supplies) { err = -ENOMEM; - goto put_padctl; + goto disable_xusbc; } for (i = 0; i < tegra->soc->num_supplies; i++) @@ -1065,7 +1089,7 @@ static int tegra_xusb_probe(struct platform_device *pdev) tegra->supplies); if (err) { dev_err(&pdev->dev, "failed to get regulators: %d\n", err); - goto put_padctl; + goto disable_xusbc; } for (i = 0; i < tegra->soc->num_types; i++) @@ -1075,7 +1099,7 @@ static int tegra_xusb_probe(struct platform_device *pdev) sizeof(*tegra->phys), GFP_KERNEL); if (!tegra->phys) { err = -ENOMEM; - goto put_padctl; + goto disable_xusbc; } for (i = 0, k = 0; i < tegra->soc->num_types; i++) { @@ -1091,7 +1115,7 @@ static int tegra_xusb_probe(struct platform_device *pdev) "failed to get PHY %s: %ld\n", prop, PTR_ERR(phy)); err = PTR_ERR(phy); - goto put_padctl; + goto disable_xusbc; } tegra->phys[k++] = phy; @@ -1102,7 +1126,7 @@ static int tegra_xusb_probe(struct platform_device *pdev) dev_name(&pdev->dev)); if (!tegra->hcd) { err = -ENOMEM; - goto put_padctl; + goto disable_xusbc; } /* @@ -1198,6 +1222,12 @@ put_rpm: disable_rpm: pm_runtime_disable(&pdev->dev); usb_put_hcd(tegra->hcd); +disable_xusbc: + if (!&pdev->dev.pm_domain) + tegra_powergate_power_off(TEGRA_POWERGATE_XUSBC); +disable_xusba: + if (!&pdev->dev.pm_domain) + tegra_powergate_power_off(TEGRA_POWERGATE_XUSBA); put_padctl: tegra_xusb_padctl_put(tegra->padctl); return err; -- cgit v1.1 From 48b73d0fa11aa8613d51f7be61d2fa7f0ab05fd3 Mon Sep 17 00:00:00 2001 From: Ruslan Bilovol Date: Fri, 25 May 2018 19:11:40 +0300 Subject: usb: core: message: remove extra endianness conversion in usb_set_isoch_delay No need to do extra endianness conversion in usb_set_isoch_delay because it is already done in usb_control_msg() Fixes: 886ee36e7205 ("usb: core: add support for USB_REQ_SET_ISOCH_DELAY") Cc: Dmytro Panchenko Cc: Felipe Balbi Cc: stable # v4.16+ Signed-off-by: Ruslan Bilovol Signed-off-by: Greg Kroah-Hartman --- drivers/usb/core/message.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers/usb') diff --git a/drivers/usb/core/message.c b/drivers/usb/core/message.c index 0c11d40..7b13700 100644 --- a/drivers/usb/core/message.c +++ b/drivers/usb/core/message.c @@ -940,7 +940,7 @@ int usb_set_isoch_delay(struct usb_device *dev) return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), USB_REQ_SET_ISOCH_DELAY, USB_DIR_OUT | USB_TYPE_STANDARD | USB_RECIP_DEVICE, - cpu_to_le16(dev->hub_delay), 0, NULL, 0, + dev->hub_delay, 0, NULL, 0, USB_CTRL_SET_TIMEOUT); } -- cgit v1.1 From 802bda5595ff79172652ede1bd0830b82f5dd596 Mon Sep 17 00:00:00 2001 From: Prasanthi Chellakumar Date: Fri, 25 May 2018 15:04:24 -0700 Subject: usb: host: ohci: fix sfr kernel warning in ohci-at91 driver The USB Host Controller driver 'ohci-at91.c' reads a Special Function Register - OHCI Interrupt Configuration Register (AT91_SFR_OHCIICR) for bits SUSPEND_A/B/C. These bits are defined in sama5d2 alone, so sfr register mapping is done with compatible string "atmel,sama5d2-sfr". This gives a kernel warning 'failed to find sfr node' with non sama5d2 cpus which is removed here, thus leaving it up to having a proper DTS. Signed-off-by: Prasanthi Chellakumar Acked-by: Alan Stern Acked-by: Nicolas Ferre Signed-off-by: Greg Kroah-Hartman --- drivers/usb/host/ohci-at91.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers/usb') diff --git a/drivers/usb/host/ohci-at91.c b/drivers/usb/host/ohci-at91.c index 5ad9e9b..e986739 100644 --- a/drivers/usb/host/ohci-at91.c +++ b/drivers/usb/host/ohci-at91.c @@ -212,7 +212,7 @@ static int usb_hcd_at91_probe(const struct hc_driver *driver, ohci_at91->sfr_regmap = at91_dt_syscon_sfr(); if (!ohci_at91->sfr_regmap) - dev_warn(dev, "failed to find sfr node\n"); + dev_dbg(dev, "failed to find sfr node\n"); board = hcd->self.controller->platform_data; ohci = hcd_to_ohci(hcd); -- cgit v1.1 From 3bea1cfcff113070655c379cec6d1dde0529bd31 Mon Sep 17 00:00:00 2001 From: Douglas Anderson Date: Fri, 25 May 2018 15:07:48 -0700 Subject: usb: dwc3: Remove DEBUG define from Qualcomm DWC3 glue driver It appears that a "#define DEBUG" was left in on the recent patch landed for the Qualcomm DWC3 glue driver. Let's remove it. Fixes: a4333c3a6ba9 ("usb: dwc3: Add Qualcomm DWC3 glue driver") Signed-off-by: Douglas Anderson Signed-off-by: Greg Kroah-Hartman --- drivers/usb/dwc3/dwc3-qcom.c | 1 - 1 file changed, 1 deletion(-) (limited to 'drivers/usb') diff --git a/drivers/usb/dwc3/dwc3-qcom.c b/drivers/usb/dwc3/dwc3-qcom.c index 8abb6f3..b0e67ab 100644 --- a/drivers/usb/dwc3/dwc3-qcom.c +++ b/drivers/usb/dwc3/dwc3-qcom.c @@ -3,7 +3,6 @@ * * Inspired by dwc3-of-simple.c */ -#define DEBUG #include #include -- cgit v1.1 From edf380046b0a726de26fc29015556a11288940ac Mon Sep 17 00:00:00 2001 From: Arnd Bergmann Date: Mon, 28 May 2018 17:34:35 +0200 Subject: usb: musb: remove an unused variable After the only users of this variable got removed, we now get a warning about 'otg' being unused: drivers/usb/musb/da8xx.c: In function 'da8xx_musb_interrupt': drivers/usb/musb/da8xx.c:226:19: error: unused variable 'otg' [-Werror=unused-variable] Fixes: d2852f2d3e6d ("usb: musb: remove references to default_a of struct usb_otg") Signed-off-by: Arnd Bergmann Signed-off-by: Greg Kroah-Hartman --- drivers/usb/musb/da8xx.c | 1 - 1 file changed, 1 deletion(-) (limited to 'drivers/usb') diff --git a/drivers/usb/musb/da8xx.c b/drivers/usb/musb/da8xx.c index 0e5929e..1c023c0 100644 --- a/drivers/usb/musb/da8xx.c +++ b/drivers/usb/musb/da8xx.c @@ -223,7 +223,6 @@ static irqreturn_t da8xx_musb_interrupt(int irq, void *hci) { struct musb *musb = hci; void __iomem *reg_base = musb->ctrl_base; - struct usb_otg *otg = musb->xceiv->otg; unsigned long flags; irqreturn_t ret = IRQ_NONE; u32 status; -- cgit v1.1 From 03e6275ae381087bd80e0058636c3762f8fbf372 Mon Sep 17 00:00:00 2001 From: Andrey Smirnov Date: Wed, 30 May 2018 10:34:14 -0700 Subject: usb: chipidea: Fix ULPI on imx51 Workaround introduced for i.MX53 in be9cae2479f48 ("usb: chipidea: imx: Fix ULPI on imx53") seems to be applicable in case of i.MX51 as well. Running latest kernel on ZII RDU1 Board (imx51-zii-rdu1.dts) exhibits a kernel frozen on PORTSC access and applying the workaround resolves the issue. Fixes: be9cae2479f4 ("usb: chipidea: imx: Fix ULPI on imx53") Cc: Peter Chen Cc: Lucas Stach Cc: Chris Healy Cc: linux-arm-kernel@lists.infradead.org Cc: linux-kernel@vger.kernel.org Cc: linux-usb@vger.kernel.org Reviewed-by: Fabio Estevam Signed-off-by: Andrey Smirnov Tested-By: Nikita Yushchenko Signed-off-by: Greg Kroah-Hartman --- drivers/usb/chipidea/ci_hdrc_imx.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) (limited to 'drivers/usb') diff --git a/drivers/usb/chipidea/ci_hdrc_imx.c b/drivers/usb/chipidea/ci_hdrc_imx.c index e431c5a..19f5f5f 100644 --- a/drivers/usb/chipidea/ci_hdrc_imx.c +++ b/drivers/usb/chipidea/ci_hdrc_imx.c @@ -291,7 +291,8 @@ static int ci_hdrc_imx_probe(struct platform_device *pdev) pdata.usb_phy = data->phy; - if (of_device_is_compatible(np, "fsl,imx53-usb") && pdata.usb_phy && + if ((of_device_is_compatible(np, "fsl,imx53-usb") || + of_device_is_compatible(np, "fsl,imx51-usb")) && pdata.usb_phy && of_usb_get_phy_mode(np) == USBPHY_INTERFACE_MODE_ULPI) { pdata.flags |= CI_HDRC_OVERRIDE_PHY_CONTROL; data->override_phy_control = true; -- cgit v1.1 From 380375b937211376f1dba4543460a14d3df9f04d Mon Sep 17 00:00:00 2001 From: Jon Hunter Date: Wed, 30 May 2018 16:11:42 +0100 Subject: usb: xhci: tegra: Fix runtime PM support Fix silly mistake when enabling runtime PM support for the Tegra XHCI driver. If runtime PM was enabled correctly for the XHCI device, then we should call pm_runtime_get_sync() to enable the device. Fixes: ee9e5f4c7825 ("usb: xhci: tegra: Add runtime PM support") Signed-off-by: Jon Hunter Signed-off-by: Greg Kroah-Hartman --- drivers/usb/host/xhci-tegra.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers/usb') diff --git a/drivers/usb/host/xhci-tegra.c b/drivers/usb/host/xhci-tegra.c index c78fc29..a8c1d07 100644 --- a/drivers/usb/host/xhci-tegra.c +++ b/drivers/usb/host/xhci-tegra.c @@ -1136,7 +1136,7 @@ static int tegra_xusb_probe(struct platform_device *pdev) platform_set_drvdata(pdev, tegra); pm_runtime_enable(&pdev->dev); - if (!pm_runtime_enabled(&pdev->dev)) + if (pm_runtime_enabled(&pdev->dev)) err = pm_runtime_get_sync(&pdev->dev); else err = tegra_xusb_runtime_resume(&pdev->dev); -- cgit v1.1 From 25244227158e1502062041365a439a54cb8fe673 Mon Sep 17 00:00:00 2001 From: Nicolas Boichat Date: Mon, 28 May 2018 14:32:18 +0800 Subject: usb: hub: Per-port setting to use old enumeration scheme The "old" enumeration scheme is considerably faster (it takes ~244ms instead of ~356ms to get the descriptor). It is currently only possible to use the old scheme globally (/sys/module/usbcore/parameters/old_scheme_first), which is not desirable as the new scheme was introduced to increase compatibility with more devices. However, in our case, we care about time-to-active for a specific USB device (which we make the firmware for), on a specific port (that is pogo-pin based: not a standard USB port). This new sysfs option makes it possible to use the old scheme on a single port only. Signed-off-by: Nicolas Boichat Signed-off-by: Greg Kroah-Hartman --- drivers/usb/core/hub.c | 13 +++++++++---- drivers/usb/core/hub.h | 1 + drivers/usb/core/port.c | 23 +++++++++++++++++++++++ 3 files changed, 33 insertions(+), 4 deletions(-) (limited to 'drivers/usb') diff --git a/drivers/usb/core/hub.c b/drivers/usb/core/hub.c index c2d993d..f900f66 100644 --- a/drivers/usb/core/hub.c +++ b/drivers/usb/core/hub.c @@ -2636,7 +2636,7 @@ static unsigned hub_is_wusb(struct usb_hub *hub) #define SET_ADDRESS_TRIES 2 #define GET_DESCRIPTOR_TRIES 2 #define SET_CONFIG_TRIES (2 * (use_both_schemes + 1)) -#define USE_NEW_SCHEME(i) ((i) / 2 == (int)old_scheme_first) +#define USE_NEW_SCHEME(i, scheme) ((i) / 2 == (int)scheme) #define HUB_ROOT_RESET_TIME 60 /* times are in msec */ #define HUB_SHORT_RESET_TIME 10 @@ -2651,12 +2651,16 @@ static unsigned hub_is_wusb(struct usb_hub *hub) * enumeration failures, so disable this enumeration scheme for USB3 * devices. */ -static bool use_new_scheme(struct usb_device *udev, int retry) +static bool use_new_scheme(struct usb_device *udev, int retry, + struct usb_port *port_dev) { + int old_scheme_first_port = + port_dev->quirks & USB_PORT_QUIRK_OLD_SCHEME; + if (udev->speed >= USB_SPEED_SUPER) return false; - return USE_NEW_SCHEME(retry); + return USE_NEW_SCHEME(retry, old_scheme_first_port || old_scheme_first); } /* Is a USB 3.0 port in the Inactive or Compliance Mode state? @@ -4392,6 +4396,7 @@ hub_port_init(struct usb_hub *hub, struct usb_device *udev, int port1, { struct usb_device *hdev = hub->hdev; struct usb_hcd *hcd = bus_to_hcd(hdev->bus); + struct usb_port *port_dev = hub->ports[port1 - 1]; int retries, operations, retval, i; unsigned delay = HUB_SHORT_RESET_TIME; enum usb_device_speed oldspeed = udev->speed; @@ -4513,7 +4518,7 @@ hub_port_init(struct usb_hub *hub, struct usb_device *udev, int port1, for (retries = 0; retries < GET_DESCRIPTOR_TRIES; (++retries, msleep(100))) { bool did_new_scheme = false; - if (use_new_scheme(udev, retry_counter)) { + if (use_new_scheme(udev, retry_counter, port_dev)) { struct usb_device_descriptor *buf; int r = 0; diff --git a/drivers/usb/core/hub.h b/drivers/usb/core/hub.h index 4dc769e..4accfb6 100644 --- a/drivers/usb/core/hub.h +++ b/drivers/usb/core/hub.h @@ -98,6 +98,7 @@ struct usb_port { struct mutex status_lock; u32 over_current_count; u8 portnum; + u32 quirks; unsigned int is_superspeed:1; unsigned int usb3_lpm_u1_permit:1; unsigned int usb3_lpm_u2_permit:1; diff --git a/drivers/usb/core/port.c b/drivers/usb/core/port.c index 6979bde..4a21431 100644 --- a/drivers/usb/core/port.c +++ b/drivers/usb/core/port.c @@ -50,6 +50,28 @@ static ssize_t over_current_count_show(struct device *dev, } static DEVICE_ATTR_RO(over_current_count); +static ssize_t quirks_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct usb_port *port_dev = to_usb_port(dev); + + return sprintf(buf, "%08x\n", port_dev->quirks); +} + +static ssize_t quirks_store(struct device *dev, struct device_attribute *attr, + const char *buf, size_t count) +{ + struct usb_port *port_dev = to_usb_port(dev); + u32 value; + + if (kstrtou32(buf, 16, &value)) + return -EINVAL; + + port_dev->quirks = value; + return count; +} +static DEVICE_ATTR_RW(quirks); + static ssize_t usb3_lpm_permit_show(struct device *dev, struct device_attribute *attr, char *buf) { @@ -118,6 +140,7 @@ static DEVICE_ATTR_RW(usb3_lpm_permit); static struct attribute *port_dev_attrs[] = { &dev_attr_connect_type.attr, + &dev_attr_quirks.attr, &dev_attr_over_current_count.attr, NULL, }; -- cgit v1.1 From aa071a92bbf09d993ff0dbf3b1f2b53ac93ad654 Mon Sep 17 00:00:00 2001 From: Nicolas Boichat Date: Mon, 28 May 2018 14:32:19 +0800 Subject: usb: hub: Per-port setting to reduce TRSTRCY to 10 ms Currently, the USB hub core waits for 50 ms after enumerating the device. This was added to help "some high speed devices" to enumerate (b789696af8 "[PATCH] USB: relax usbcore reset timings"). On some devices, the time-to-active is important, so we provide a per-port option to reduce the time to what the USB specification requires: 10 ms. Signed-off-by: Nicolas Boichat Signed-off-by: Greg Kroah-Hartman --- drivers/usb/core/hub.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) (limited to 'drivers/usb') diff --git a/drivers/usb/core/hub.c b/drivers/usb/core/hub.c index f900f66..26c2438 100644 --- a/drivers/usb/core/hub.c +++ b/drivers/usb/core/hub.c @@ -2879,7 +2879,11 @@ static int hub_port_reset(struct usb_hub *hub, int port1, done: if (status == 0) { /* TRSTRCY = 10 ms; plus some extra */ - msleep(10 + 40); + if (port_dev->quirks & USB_PORT_QUIRK_FAST_ENUM) + usleep_range(10000, 12000); + else + msleep(10 + 40); + if (udev) { struct usb_hcd *hcd = bus_to_hcd(udev->bus); -- cgit v1.1 From 822852f203f75f929cd90eb196c0f7ca17efe6b1 Mon Sep 17 00:00:00 2001 From: Arnd Bergmann Date: Wed, 30 May 2018 23:33:50 +0200 Subject: phy: tegra: select USB_COMMON A built-in PHY driver cannot link against modular USB core code: drivers/usb/phy/phy-tegra-usb.o: In function `tegra_usb_phy_probe': phy-tegra-usb.c:(.text+0x6bc): undefined reference to `usb_get_dr_mode' This uses a 'select' statement in Kconfig like we have for other such PHY drivers. Signed-off-by: Arnd Bergmann Reviewed-by: Dmitry Osipenko Signed-off-by: Greg Kroah-Hartman --- drivers/usb/phy/Kconfig | 1 + 1 file changed, 1 insertion(+) (limited to 'drivers/usb') diff --git a/drivers/usb/phy/Kconfig b/drivers/usb/phy/Kconfig index b9b0a44..d7312ee 100644 --- a/drivers/usb/phy/Kconfig +++ b/drivers/usb/phy/Kconfig @@ -162,6 +162,7 @@ config USB_MXS_PHY config USB_TEGRA_PHY tristate "NVIDIA Tegra USB PHY Driver" depends on ARCH_TEGRA + select USB_COMMON select USB_PHY select USB_ULPI help -- cgit v1.1 From a941fc3957113df977e7396c2cf1679e87a65555 Mon Sep 17 00:00:00 2001 From: Greg Kroah-Hartman Date: Tue, 29 May 2018 17:30:46 +0200 Subject: USB: typec: tcpm: no need to check return value of debugfs_create_dir() When calling debugfs functions, there is no need to ever check the return value. The function can work or not, but the code logic should never do something different based on this. Clean up the tcpm.c code to not care about this, turns out no one was even checking the return value of this function, so it didn't matter. Note, I do not think this code can be removed in a running system, as the debugfs root directory will stick around, that should be fixed someday... Revieved-by: Heikki Krogerus Reviewed-by: Guenter Roeck Signed-off-by: Greg Kroah-Hartman --- drivers/usb/typec/tcpm.c | 11 +++-------- 1 file changed, 3 insertions(+), 8 deletions(-) (limited to 'drivers/usb') diff --git a/drivers/usb/typec/tcpm.c b/drivers/usb/typec/tcpm.c index 0ccd2ce..8a201dd 100644 --- a/drivers/usb/typec/tcpm.c +++ b/drivers/usb/typec/tcpm.c @@ -566,21 +566,16 @@ DEFINE_SHOW_ATTRIBUTE(tcpm_debug); static struct dentry *rootdir; -static int tcpm_debugfs_init(struct tcpm_port *port) +static void tcpm_debugfs_init(struct tcpm_port *port) { mutex_init(&port->logbuffer_lock); /* /sys/kernel/debug/tcpm/usbcX */ - if (!rootdir) { + if (!rootdir) rootdir = debugfs_create_dir("tcpm", NULL); - if (!rootdir) - return -ENOMEM; - } port->dentry = debugfs_create_file(dev_name(port->dev), S_IFREG | 0444, rootdir, port, &tcpm_debug_fops); - - return 0; } static void tcpm_debugfs_exit(struct tcpm_port *port) @@ -595,7 +590,7 @@ static void tcpm_log(const struct tcpm_port *port, const char *fmt, ...) { } __printf(2, 3) static void tcpm_log_force(struct tcpm_port *port, const char *fmt, ...) { } static void tcpm_log_source_caps(struct tcpm_port *port) { } -static int tcpm_debugfs_init(const struct tcpm_port *port) { return 0; } +static void tcpm_debugfs_init(const struct tcpm_port *port) { } static void tcpm_debugfs_exit(const struct tcpm_port *port) { } #endif -- cgit v1.1 From 8a1ef171ffc3de16d4f34e03a2b8c296771f7015 Mon Sep 17 00:00:00 2001 From: Greg Kroah-Hartman Date: Tue, 29 May 2018 17:30:48 +0200 Subject: USB: musb: clean up debugfs file and directory creation When calling debugfs functions, there is no need to ever check the return value. The function can work or not, but the code logic should never do something different based on this. Because of this, lots of init functions do not need to have return values, so this cleans up a lot of unused error handling code that never could have triggered in the past. Cc: Bin Liu Signed-off-by: Greg Kroah-Hartman --- drivers/usb/musb/musb_core.c | 5 +---- drivers/usb/musb/musb_debug.h | 5 ++--- drivers/usb/musb/musb_debugfs.c | 44 +++++++---------------------------------- drivers/usb/musb/musb_dsps.c | 9 +-------- 4 files changed, 11 insertions(+), 52 deletions(-) (limited to 'drivers/usb') diff --git a/drivers/usb/musb/musb_core.c b/drivers/usb/musb/musb_core.c index 5cc6498..b7d5627 100644 --- a/drivers/usb/musb/musb_core.c +++ b/drivers/usb/musb/musb_core.c @@ -2387,9 +2387,7 @@ musb_init_controller(struct device *dev, int nIrq, void __iomem *ctrl) if (status < 0) goto fail3; - status = musb_init_debugfs(musb); - if (status < 0) - goto fail4; + musb_init_debugfs(musb); status = sysfs_create_group(&musb->controller->kobj, &musb_attr_group); if (status) @@ -2404,7 +2402,6 @@ musb_init_controller(struct device *dev, int nIrq, void __iomem *ctrl) fail5: musb_exit_debugfs(musb); -fail4: musb_gadget_cleanup(musb); musb_host_cleanup(musb); diff --git a/drivers/usb/musb/musb_debug.h b/drivers/usb/musb/musb_debug.h index 5e0f079..c444a80 100644 --- a/drivers/usb/musb/musb_debug.h +++ b/drivers/usb/musb/musb_debug.h @@ -20,12 +20,11 @@ void musb_dbg(struct musb *musb, const char *fmt, ...); #ifdef CONFIG_DEBUG_FS -int musb_init_debugfs(struct musb *musb); +void musb_init_debugfs(struct musb *musb); void musb_exit_debugfs(struct musb *musb); #else -static inline int musb_init_debugfs(struct musb *musb) +static inline void musb_init_debugfs(struct musb *musb) { - return 0; } static inline void musb_exit_debugfs(struct musb *musb) { diff --git a/drivers/usb/musb/musb_debugfs.c b/drivers/usb/musb/musb_debugfs.c index e2050ca..f42858e2 100644 --- a/drivers/usb/musb/musb_debugfs.c +++ b/drivers/usb/musb/musb_debugfs.c @@ -321,48 +321,18 @@ static const struct file_operations musb_softconnect_fops = { .release = single_release, }; -int musb_init_debugfs(struct musb *musb) +void musb_init_debugfs(struct musb *musb) { - struct dentry *root; - struct dentry *file; - int ret; + struct dentry *root; root = debugfs_create_dir(dev_name(musb->controller), NULL); - if (!root) { - ret = -ENOMEM; - goto err0; - } - - file = debugfs_create_file("regdump", S_IRUGO, root, musb, - &musb_regdump_fops); - if (!file) { - ret = -ENOMEM; - goto err1; - } - - file = debugfs_create_file("testmode", S_IRUGO | S_IWUSR, - root, musb, &musb_test_mode_fops); - if (!file) { - ret = -ENOMEM; - goto err1; - } - - file = debugfs_create_file("softconnect", S_IRUGO | S_IWUSR, - root, musb, &musb_softconnect_fops); - if (!file) { - ret = -ENOMEM; - goto err1; - } - musb->debugfs_root = root; - return 0; - -err1: - debugfs_remove_recursive(root); - -err0: - return ret; + debugfs_create_file("regdump", S_IRUGO, root, musb, &musb_regdump_fops); + debugfs_create_file("testmode", S_IRUGO | S_IWUSR, root, musb, + &musb_test_mode_fops); + debugfs_create_file("softconnect", S_IRUGO | S_IWUSR, root, musb, + &musb_softconnect_fops); } void /* __init_or_exit */ musb_exit_debugfs(struct musb *musb) diff --git a/drivers/usb/musb/musb_dsps.c b/drivers/usb/musb/musb_dsps.c index cfe6bfc..fb871ea 100644 --- a/drivers/usb/musb/musb_dsps.c +++ b/drivers/usb/musb/musb_dsps.c @@ -399,24 +399,17 @@ out: static int dsps_musb_dbg_init(struct musb *musb, struct dsps_glue *glue) { struct dentry *root; - struct dentry *file; char buf[128]; sprintf(buf, "%s.dsps", dev_name(musb->controller)); root = debugfs_create_dir(buf, NULL); - if (!root) - return -ENOMEM; glue->dbgfs_root = root; glue->regset.regs = dsps_musb_regs; glue->regset.nregs = ARRAY_SIZE(dsps_musb_regs); glue->regset.base = musb->ctrl_base; - file = debugfs_create_regset32("regdump", S_IRUGO, root, &glue->regset); - if (!file) { - debugfs_remove_recursive(root); - return -ENOMEM; - } + debugfs_create_regset32("regdump", S_IRUGO, root, &glue->regset); return 0; } -- cgit v1.1 From 71cae9ad42168ab5ed21af5e068d45e712e5cc75 Mon Sep 17 00:00:00 2001 From: Greg Kroah-Hartman Date: Tue, 29 May 2018 17:30:49 +0200 Subject: USB: mtu3: no need to check return value of debugfs_create_dir() When calling debugfs functions, there is no need to ever check the return value. The function can work or not, but the code logic should never do something different based on this. Cc: Chunfeng Yun Signed-off-by: Greg Kroah-Hartman --- drivers/usb/mtu3/mtu3_dr.c | 4 ---- 1 file changed, 4 deletions(-) (limited to 'drivers/usb') diff --git a/drivers/usb/mtu3/mtu3_dr.c b/drivers/usb/mtu3/mtu3_dr.c index 8c3bbf7..ac60e9c 100644 --- a/drivers/usb/mtu3/mtu3_dr.c +++ b/drivers/usb/mtu3/mtu3_dr.c @@ -378,10 +378,6 @@ static void ssusb_debugfs_init(struct ssusb_mtk *ssusb) struct dentry *root; root = debugfs_create_dir(dev_name(ssusb->dev), usb_debug_root); - if (!root) { - dev_err(ssusb->dev, "create debugfs root failed\n"); - return; - } ssusb->dbgfs_root = root; debugfs_create_file("mode", 0644, root, ssusb, &ssusb_mode_fops); -- cgit v1.1 From 26d0b228b455862983c6e512eacdaae1374d8072 Mon Sep 17 00:00:00 2001 From: Greg Kroah-Hartman Date: Tue, 29 May 2018 17:30:50 +0200 Subject: USB: mon: no need to check return value of debugfs_create functions When calling debugfs functions, there is no need to ever check the return value. The function can work or not, but the code logic should never do something different based on this. We do need to save the dentries for these files, so keep them around, but no need to check if they are "valid" or not, as the code works just as well either way. Cc: Pete Zaitcev Cc: Philippe Ombredanne Cc: Fredrik Noring Cc: Kate Stewart Signed-off-by: Greg Kroah-Hartman --- drivers/usb/mon/mon_text.c | 37 +++++++------------------------------ 1 file changed, 7 insertions(+), 30 deletions(-) (limited to 'drivers/usb') diff --git a/drivers/usb/mon/mon_text.c b/drivers/usb/mon/mon_text.c index 984f7e1..bc5ecd5 100644 --- a/drivers/usb/mon/mon_text.c +++ b/drivers/usb/mon/mon_text.c @@ -700,7 +700,6 @@ static const struct file_operations mon_fops_text_u = { int mon_text_add(struct mon_bus *mbus, const struct usb_bus *ubus) { - struct dentry *d; enum { NAMESZ = 10 }; char name[NAMESZ]; int busnum = ubus? ubus->busnum: 0; @@ -713,42 +712,32 @@ int mon_text_add(struct mon_bus *mbus, const struct usb_bus *ubus) rc = snprintf(name, NAMESZ, "%dt", busnum); if (rc <= 0 || rc >= NAMESZ) goto err_print_t; - d = debugfs_create_file(name, 0600, mon_dir, mbus, + mbus->dent_t = debugfs_create_file(name, 0600, mon_dir, mbus, &mon_fops_text_t); - if (d == NULL) - goto err_create_t; - mbus->dent_t = d; } rc = snprintf(name, NAMESZ, "%du", busnum); if (rc <= 0 || rc >= NAMESZ) goto err_print_u; - d = debugfs_create_file(name, 0600, mon_dir, mbus, &mon_fops_text_u); - if (d == NULL) - goto err_create_u; - mbus->dent_u = d; + mbus->dent_u = debugfs_create_file(name, 0600, mon_dir, mbus, + &mon_fops_text_u); rc = snprintf(name, NAMESZ, "%ds", busnum); if (rc <= 0 || rc >= NAMESZ) goto err_print_s; - d = debugfs_create_file(name, 0600, mon_dir, mbus, &mon_fops_stat); - if (d == NULL) - goto err_create_s; - mbus->dent_s = d; + mbus->dent_s = debugfs_create_file(name, 0600, mon_dir, mbus, + &mon_fops_stat); return 1; -err_create_s: err_print_s: debugfs_remove(mbus->dent_u); mbus->dent_u = NULL; -err_create_u: err_print_u: if (ubus != NULL) { debugfs_remove(mbus->dent_t); mbus->dent_t = NULL; } -err_create_t: err_print_t: return 0; } @@ -756,8 +745,7 @@ err_print_t: void mon_text_del(struct mon_bus *mbus) { debugfs_remove(mbus->dent_u); - if (mbus->dent_t != NULL) - debugfs_remove(mbus->dent_t); + debugfs_remove(mbus->dent_t); debugfs_remove(mbus->dent_s); } @@ -775,18 +763,7 @@ static void mon_text_ctor(void *mem) int __init mon_text_init(void) { - struct dentry *mondir; - - mondir = debugfs_create_dir("usbmon", usb_debug_root); - if (IS_ERR(mondir)) { - /* debugfs not available, but we can use usbmon without it */ - return 0; - } - if (mondir == NULL) { - printk(KERN_NOTICE TAG ": unable to create usbmon directory\n"); - return -ENOMEM; - } - mon_dir = mondir; + mon_dir = debugfs_create_dir("usbmon", usb_debug_root); return 0; } -- cgit v1.1 From 377058707eed2be62bc200fbfa9db544dbe7d439 Mon Sep 17 00:00:00 2001 From: Greg Kroah-Hartman Date: Tue, 29 May 2018 17:30:51 +0200 Subject: USB: uhci: no need to check return value of debugfs_create functions When calling debugfs functions, there is no need to ever check the return value. The function can work or not, but the code logic should never do something different based on this. Cc: Alan Stern Signed-off-by: Greg Kroah-Hartman --- drivers/usb/host/uhci-hcd.c | 15 ++++----------- 1 file changed, 4 insertions(+), 11 deletions(-) (limited to 'drivers/usb') diff --git a/drivers/usb/host/uhci-hcd.c b/drivers/usb/host/uhci-hcd.c index f9c3947..6218bfe 100644 --- a/drivers/usb/host/uhci-hcd.c +++ b/drivers/usb/host/uhci-hcd.c @@ -590,14 +590,10 @@ static int uhci_start(struct usb_hcd *hcd) init_waitqueue_head(&uhci->waitqh); #ifdef UHCI_DEBUG_OPS - dentry = debugfs_create_file(hcd->self.bus_name, - S_IFREG|S_IRUGO|S_IWUSR, uhci_debugfs_root, - uhci, &uhci_debug_operations); - if (!dentry) { - dev_err(uhci_dev(uhci), "couldn't create uhci debugfs entry\n"); - return -ENOMEM; - } - uhci->dentry = dentry; + uhci->dentry = debugfs_create_file(hcd->self.bus_name, + S_IFREG|S_IRUGO|S_IWUSR, + uhci_debugfs_root, uhci, + &uhci_debug_operations); #endif uhci->frame = dma_zalloc_coherent(uhci_dev(uhci), @@ -882,8 +878,6 @@ static int __init uhci_hcd_init(void) if (!errbuf) goto errbuf_failed; uhci_debugfs_root = debugfs_create_dir("uhci", usb_debug_root); - if (!uhci_debugfs_root) - goto debug_failed; #endif uhci_up_cachep = kmem_cache_create("uhci_urb_priv", @@ -918,7 +912,6 @@ up_failed: #if defined(DEBUG) || defined(CONFIG_DYNAMIC_DEBUG) debugfs_remove(uhci_debugfs_root); -debug_failed: kfree(errbuf); errbuf_failed: -- cgit v1.1 From 63c4c0d8818fa2e48d546cd2c22659e6b59e8db5 Mon Sep 17 00:00:00 2001 From: Greg Kroah-Hartman Date: Tue, 29 May 2018 17:30:52 +0200 Subject: USB: ohci: no need to check return value of debugfs_create functions When calling debugfs functions, there is no need to ever check the return value. The function can work or not, but the code logic should never do something different based on this. There is also no need to keep the file dentries around at all, so remove those variables from the host controller structure. Cc: Alan Stern Signed-off-by: Greg Kroah-Hartman --- drivers/usb/host/ohci-dbg.c | 45 +++++++++------------------------------------ drivers/usb/host/ohci-hcd.c | 5 ----- drivers/usb/host/ohci.h | 3 --- 3 files changed, 9 insertions(+), 44 deletions(-) (limited to 'drivers/usb') diff --git a/drivers/usb/host/ohci-dbg.c b/drivers/usb/host/ohci-dbg.c index ac7d4ac..d3ee1f52a 100644 --- a/drivers/usb/host/ohci-dbg.c +++ b/drivers/usb/host/ohci-dbg.c @@ -762,50 +762,23 @@ static int debug_registers_open(struct inode *inode, struct file *file) static inline void create_debug_files (struct ohci_hcd *ohci) { struct usb_bus *bus = &ohci_to_hcd(ohci)->self; + struct dentry *root; - ohci->debug_dir = debugfs_create_dir(bus->bus_name, ohci_debug_root); - if (!ohci->debug_dir) - goto dir_error; + root = debugfs_create_dir(bus->bus_name, ohci_debug_root); + ohci->debug_dir = root; - ohci->debug_async = debugfs_create_file("async", S_IRUGO, - ohci->debug_dir, ohci, - &debug_async_fops); - if (!ohci->debug_async) - goto async_error; - - ohci->debug_periodic = debugfs_create_file("periodic", S_IRUGO, - ohci->debug_dir, ohci, - &debug_periodic_fops); - if (!ohci->debug_periodic) - goto periodic_error; - - ohci->debug_registers = debugfs_create_file("registers", S_IRUGO, - ohci->debug_dir, ohci, - &debug_registers_fops); - if (!ohci->debug_registers) - goto registers_error; + debugfs_create_file("async", S_IRUGO, root, ohci, &debug_async_fops); + debugfs_create_file("periodic", S_IRUGO, root, ohci, + &debug_periodic_fops); + debugfs_create_file("registers", S_IRUGO, root, ohci, + &debug_registers_fops); ohci_dbg (ohci, "created debug files\n"); - return; - -registers_error: - debugfs_remove(ohci->debug_periodic); -periodic_error: - debugfs_remove(ohci->debug_async); -async_error: - debugfs_remove(ohci->debug_dir); -dir_error: - ohci->debug_periodic = NULL; - ohci->debug_async = NULL; - ohci->debug_dir = NULL; } static inline void remove_debug_files (struct ohci_hcd *ohci) { - debugfs_remove(ohci->debug_registers); - debugfs_remove(ohci->debug_periodic); - debugfs_remove(ohci->debug_async); - debugfs_remove(ohci->debug_dir); + debugfs_remove_recursive(ohci->debug_dir); } /*-------------------------------------------------------------------------*/ diff --git a/drivers/usb/host/ohci-hcd.c b/drivers/usb/host/ohci-hcd.c index 4806e0f..210181f 100644 --- a/drivers/usb/host/ohci-hcd.c +++ b/drivers/usb/host/ohci-hcd.c @@ -1258,10 +1258,6 @@ static int __init ohci_hcd_mod_init(void) set_bit(USB_OHCI_LOADED, &usb_hcds_loaded); ohci_debug_root = debugfs_create_dir("ohci", usb_debug_root); - if (!ohci_debug_root) { - retval = -ENOENT; - goto error_debug; - } #ifdef PS3_SYSTEM_BUS_DRIVER retval = ps3_ohci_driver_register(&PS3_SYSTEM_BUS_DRIVER); @@ -1318,7 +1314,6 @@ static int __init ohci_hcd_mod_init(void) #endif debugfs_remove(ohci_debug_root); ohci_debug_root = NULL; - error_debug: clear_bit(USB_OHCI_LOADED, &usb_hcds_loaded); return retval; diff --git a/drivers/usb/host/ohci.h b/drivers/usb/host/ohci.h index 508a803..ef4813b 100644 --- a/drivers/usb/host/ohci.h +++ b/drivers/usb/host/ohci.h @@ -431,9 +431,6 @@ struct ohci_hcd { struct work_struct nec_work; /* Worker for NEC quirk */ struct dentry *debug_dir; - struct dentry *debug_async; - struct dentry *debug_periodic; - struct dentry *debug_registers; /* platform-specific data -- must come last */ unsigned long priv[0] __aligned(sizeof(s64)); -- cgit v1.1 From 9fc6f2203f5def3c8798c695dae49ee441a8192c Mon Sep 17 00:00:00 2001 From: Greg Kroah-Hartman Date: Tue, 29 May 2018 17:30:53 +0200 Subject: USB: isp116x-hcd: no need to check return value of debugfs_create functions When calling debugfs functions, there is no need to ever check the return value. The function can work or not, but the code logic should never do something different based on this. Cc: Olav Kongas Signed-off-by: Greg Kroah-Hartman --- drivers/usb/host/isp116x-hcd.c | 17 ++++------------- 1 file changed, 4 insertions(+), 13 deletions(-) (limited to 'drivers/usb') diff --git a/drivers/usb/host/isp116x-hcd.c b/drivers/usb/host/isp116x-hcd.c index 4602ed8..74da136 100644 --- a/drivers/usb/host/isp116x-hcd.c +++ b/drivers/usb/host/isp116x-hcd.c @@ -1198,14 +1198,11 @@ static int isp116x_debug_show(struct seq_file *s, void *unused) } DEFINE_SHOW_ATTRIBUTE(isp116x_debug); -static int create_debug_file(struct isp116x *isp116x) +static void create_debug_file(struct isp116x *isp116x) { isp116x->dentry = debugfs_create_file(hcd_name, S_IRUGO, NULL, isp116x, &isp116x_debug_fops); - if (!isp116x->dentry) - return -ENOMEM; - return 0; } static void remove_debug_file(struct isp116x *isp116x) @@ -1215,8 +1212,8 @@ static void remove_debug_file(struct isp116x *isp116x) #else -#define create_debug_file(d) 0 -#define remove_debug_file(d) do{}while(0) +static inline void create_debug_file(struct isp116x *isp116x) { } +static inline void remove_debug_file(struct isp116x *isp116x) { } #endif /* CONFIG_DEBUG_FS */ @@ -1643,16 +1640,10 @@ static int isp116x_probe(struct platform_device *pdev) device_wakeup_enable(hcd->self.controller); - ret = create_debug_file(isp116x); - if (ret) { - ERR("Couldn't create debugfs entry\n"); - goto err7; - } + create_debug_file(isp116x); return 0; - err7: - usb_remove_hcd(hcd); err6: usb_put_hcd(hcd); err5: -- cgit v1.1 From 465d3256f635a85f2b58ad0f4800fa38078e3555 Mon Sep 17 00:00:00 2001 From: Greg Kroah-Hartman Date: Tue, 29 May 2018 17:30:54 +0200 Subject: USB: imx21-hcd: no need to check return value of debugfs_create functions When calling debugfs functions, there is no need to ever check the return value. The function can work or not, but the code logic should never do something different based on this. Cc: Felipe Balbi Cc: Johan Hovold Cc: Andy Shevchenko Signed-off-by: Greg Kroah-Hartman --- drivers/usb/host/imx21-dbg.c | 44 ++++++++++---------------------------------- 1 file changed, 10 insertions(+), 34 deletions(-) (limited to 'drivers/usb') diff --git a/drivers/usb/host/imx21-dbg.c b/drivers/usb/host/imx21-dbg.c index a213ed6..7fcf1d9 100644 --- a/drivers/usb/host/imx21-dbg.c +++ b/drivers/usb/host/imx21-dbg.c @@ -417,46 +417,22 @@ DEFINE_SHOW_ATTRIBUTE(debug_isoc); static void create_debug_files(struct imx21 *imx21) { - imx21->debug_root = debugfs_create_dir(dev_name(imx21->dev), NULL); - if (!imx21->debug_root) - goto failed_create_rootdir; + struct dentry *root; - if (!debugfs_create_file("status", S_IRUGO, - imx21->debug_root, imx21, &debug_status_fops)) - goto failed_create; + root = debugfs_create_dir(dev_name(imx21->dev), NULL); + imx21->debug_root = root; - if (!debugfs_create_file("dmem", S_IRUGO, - imx21->debug_root, imx21, &debug_dmem_fops)) - goto failed_create; - - if (!debugfs_create_file("etd", S_IRUGO, - imx21->debug_root, imx21, &debug_etd_fops)) - goto failed_create; - - if (!debugfs_create_file("statistics", S_IRUGO, - imx21->debug_root, imx21, &debug_statistics_fops)) - goto failed_create; - - if (!debugfs_create_file("isoc", S_IRUGO, - imx21->debug_root, imx21, &debug_isoc_fops)) - goto failed_create; - - return; - -failed_create: - debugfs_remove_recursive(imx21->debug_root); - -failed_create_rootdir: - imx21->debug_root = NULL; + debugfs_create_file("status", S_IRUGO, root, imx21, &debug_status_fops); + debugfs_create_file("dmem", S_IRUGO, root, imx21, &debug_dmem_fops); + debugfs_create_file("etd", S_IRUGO, root, imx21, &debug_etd_fops); + debugfs_create_file("statistics", S_IRUGO, root, imx21, + &debug_statistics_fops); + debugfs_create_file("isoc", S_IRUGO, root, imx21, &debug_isoc_fops); } - static void remove_debug_files(struct imx21 *imx21) { - if (imx21->debug_root) { - debugfs_remove_recursive(imx21->debug_root); - imx21->debug_root = NULL; - } + debugfs_remove_recursive(imx21->debug_root); } #endif -- cgit v1.1 From 9b10516fa163e92b7aa3cae4069a600733a27c57 Mon Sep 17 00:00:00 2001 From: Greg Kroah-Hartman Date: Tue, 29 May 2018 17:30:55 +0200 Subject: USB: fotg210-hcd: no need to check return value of debugfs_create functions When calling debugfs functions, there is no need to ever check the return value. The function can work or not, but the code logic should never do something different based on this. Cc: Felipe Balbi Cc: Alan Stern Cc: Johan Hovold Cc: Kuppuswamy Sathyanarayanan Cc: Vasyl Gomonovych Cc: Mariusz Skamra Cc: "Gustavo A. R. Silva" Signed-off-by: Greg Kroah-Hartman --- drivers/usb/host/fotg210-hcd.c | 34 +++++++++------------------------- 1 file changed, 9 insertions(+), 25 deletions(-) (limited to 'drivers/usb') diff --git a/drivers/usb/host/fotg210-hcd.c b/drivers/usb/host/fotg210-hcd.c index d8abf40..e64eb47 100644 --- a/drivers/usb/host/fotg210-hcd.c +++ b/drivers/usb/host/fotg210-hcd.c @@ -844,28 +844,16 @@ static int debug_registers_open(struct inode *inode, struct file *file) static inline void create_debug_files(struct fotg210_hcd *fotg210) { struct usb_bus *bus = &fotg210_to_hcd(fotg210)->self; + struct dentry *root; - fotg210->debug_dir = debugfs_create_dir(bus->bus_name, - fotg210_debug_root); - if (!fotg210->debug_dir) - return; - - if (!debugfs_create_file("async", S_IRUGO, fotg210->debug_dir, bus, - &debug_async_fops)) - goto file_error; - - if (!debugfs_create_file("periodic", S_IRUGO, fotg210->debug_dir, bus, - &debug_periodic_fops)) - goto file_error; + root = debugfs_create_dir(bus->bus_name, fotg210_debug_root); + fotg210->debug_dir = root; - if (!debugfs_create_file("registers", S_IRUGO, fotg210->debug_dir, bus, - &debug_registers_fops)) - goto file_error; - - return; - -file_error: - debugfs_remove_recursive(fotg210->debug_dir); + debugfs_create_file("async", S_IRUGO, root, bus, &debug_async_fops); + debugfs_create_file("periodic", S_IRUGO, root, bus, + &debug_periodic_fops); + debugfs_create_file("registers", S_IRUGO, root, bus, + &debug_registers_fops); } static inline void remove_debug_files(struct fotg210_hcd *fotg210) @@ -5686,10 +5674,6 @@ static int __init fotg210_hcd_init(void) sizeof(struct fotg210_itd)); fotg210_debug_root = debugfs_create_dir("fotg210", usb_debug_root); - if (!fotg210_debug_root) { - retval = -ENOENT; - goto err_debug; - } retval = platform_driver_register(&fotg210_hcd_driver); if (retval < 0) @@ -5699,7 +5683,7 @@ static int __init fotg210_hcd_init(void) clean: debugfs_remove(fotg210_debug_root); fotg210_debug_root = NULL; -err_debug: + clear_bit(USB_EHCI_LOADED, &usb_hcds_loaded); return retval; } -- cgit v1.1 From 2ee127242a52267456610158f13126e64e1bdecd Mon Sep 17 00:00:00 2001 From: Greg Kroah-Hartman Date: Tue, 29 May 2018 17:30:56 +0200 Subject: USB: fhci-hcd: no need to check return value of debugfs_create functions When calling debugfs functions, there is no need to ever check the return value. The function can work or not, but the code logic should never do something different based on this. There is also no need to keep the file dentries around at all, so remove those variables from the host controller structure. Cc: Felipe Balbi Cc: Andy Shevchenko Cc: Johan Hovold Signed-off-by: Greg Kroah-Hartman --- drivers/usb/host/fhci-dbg.c | 23 +++++------------------ drivers/usb/host/fhci.h | 2 -- 2 files changed, 5 insertions(+), 20 deletions(-) (limited to 'drivers/usb') diff --git a/drivers/usb/host/fhci-dbg.c b/drivers/usb/host/fhci-dbg.c index ebf9bb2..100048b 100644 --- a/drivers/usb/host/fhci-dbg.c +++ b/drivers/usb/host/fhci-dbg.c @@ -83,27 +83,14 @@ void fhci_dfs_create(struct fhci_hcd *fhci) struct device *dev = fhci_to_hcd(fhci)->self.controller; fhci->dfs_root = debugfs_create_dir(dev_name(dev), usb_debug_root); - if (!fhci->dfs_root) { - WARN_ON(1); - return; - } - - fhci->dfs_regs = debugfs_create_file("regs", S_IFREG | S_IRUGO, - fhci->dfs_root, fhci, &fhci_dfs_regs_fops); - fhci->dfs_irq_stat = debugfs_create_file("irq_stat", - S_IFREG | S_IRUGO, fhci->dfs_root, fhci, - &fhci_dfs_irq_stat_fops); - - WARN_ON(!fhci->dfs_regs || !fhci->dfs_irq_stat); + debugfs_create_file("regs", S_IFREG | S_IRUGO, fhci->dfs_root, fhci, + &fhci_dfs_regs_fops); + debugfs_create_file("irq_stat", S_IFREG | S_IRUGO, fhci->dfs_root, fhci, + &fhci_dfs_irq_stat_fops); } void fhci_dfs_destroy(struct fhci_hcd *fhci) { - if (!fhci->dfs_root) - return; - - debugfs_remove(fhci->dfs_irq_stat); - debugfs_remove(fhci->dfs_regs); - debugfs_remove(fhci->dfs_root); + debugfs_remove_recursive(fhci->dfs_root); } diff --git a/drivers/usb/host/fhci.h b/drivers/usb/host/fhci.h index e7ec41d6..2ce5031 100644 --- a/drivers/usb/host/fhci.h +++ b/drivers/usb/host/fhci.h @@ -262,8 +262,6 @@ struct fhci_hcd { #ifdef CONFIG_FHCI_DEBUG int usb_irq_stat[13]; struct dentry *dfs_root; - struct dentry *dfs_regs; - struct dentry *dfs_irq_stat; #endif }; -- cgit v1.1 From b8fc7743406d883e68d60ad6e73a86ae9059f1e6 Mon Sep 17 00:00:00 2001 From: Greg Kroah-Hartman Date: Tue, 29 May 2018 17:30:57 +0200 Subject: USB: ehci-hcd: no need to check return value of debugfs_create functions When calling debugfs functions, there is no need to ever check the return value. The function can work or not, but the code logic should never do something different based on this. Cc: Alan Stern Signed-off-by: Greg Kroah-Hartman --- drivers/usb/host/ehci-dbg.c | 30 ++++++++---------------------- drivers/usb/host/ehci-hcd.c | 5 ----- 2 files changed, 8 insertions(+), 27 deletions(-) (limited to 'drivers/usb') diff --git a/drivers/usb/host/ehci-dbg.c b/drivers/usb/host/ehci-dbg.c index 3ed75aa..7619cfb 100644 --- a/drivers/usb/host/ehci-dbg.c +++ b/drivers/usb/host/ehci-dbg.c @@ -1028,29 +1028,15 @@ static inline void create_debug_files(struct ehci_hcd *ehci) struct usb_bus *bus = &ehci_to_hcd(ehci)->self; ehci->debug_dir = debugfs_create_dir(bus->bus_name, ehci_debug_root); - if (!ehci->debug_dir) - return; - if (!debugfs_create_file("async", S_IRUGO, ehci->debug_dir, bus, - &debug_async_fops)) - goto file_error; - - if (!debugfs_create_file("bandwidth", S_IRUGO, ehci->debug_dir, bus, - &debug_bandwidth_fops)) - goto file_error; - - if (!debugfs_create_file("periodic", S_IRUGO, ehci->debug_dir, bus, - &debug_periodic_fops)) - goto file_error; - - if (!debugfs_create_file("registers", S_IRUGO, ehci->debug_dir, bus, - &debug_registers_fops)) - goto file_error; - - return; - -file_error: - debugfs_remove_recursive(ehci->debug_dir); + debugfs_create_file("async", S_IRUGO, ehci->debug_dir, bus, + &debug_async_fops); + debugfs_create_file("bandwidth", S_IRUGO, ehci->debug_dir, bus, + &debug_bandwidth_fops); + debugfs_create_file("periodic", S_IRUGO, ehci->debug_dir, bus, + &debug_periodic_fops); + debugfs_create_file("registers", S_IRUGO, ehci->debug_dir, bus, + &debug_registers_fops); } static inline void remove_debug_files(struct ehci_hcd *ehci) diff --git a/drivers/usb/host/ehci-hcd.c b/drivers/usb/host/ehci-hcd.c index d927adf..89c47ae 100644 --- a/drivers/usb/host/ehci-hcd.c +++ b/drivers/usb/host/ehci-hcd.c @@ -1311,10 +1311,6 @@ static int __init ehci_hcd_init(void) #ifdef CONFIG_DYNAMIC_DEBUG ehci_debug_root = debugfs_create_dir("ehci", usb_debug_root); - if (!ehci_debug_root) { - retval = -ENOENT; - goto err_debug; - } #endif #ifdef PLATFORM_DRIVER @@ -1361,7 +1357,6 @@ clean0: #ifdef CONFIG_DYNAMIC_DEBUG debugfs_remove(ehci_debug_root); ehci_debug_root = NULL; -err_debug: #endif clear_bit(USB_EHCI_LOADED, &usb_hcds_loaded); return retval; -- cgit v1.1 From a61b75d10882b3732b6dba29c10b1a54ffb36819 Mon Sep 17 00:00:00 2001 From: Greg Kroah-Hartman Date: Tue, 29 May 2018 17:30:58 +0200 Subject: USB: chipidea: no need to check return value of debugfs_create functions When calling debugfs functions, there is no need to ever check the return value. The function can work or not, but the code logic should never do something different based on this. Acked-by: Peter Chen Signed-off-by: Greg Kroah-Hartman --- drivers/usb/chipidea/ci.h | 2 +- drivers/usb/chipidea/core.c | 4 +--- drivers/usb/chipidea/debug.c | 56 ++++++++++++-------------------------------- 3 files changed, 17 insertions(+), 45 deletions(-) (limited to 'drivers/usb') diff --git a/drivers/usb/chipidea/ci.h b/drivers/usb/chipidea/ci.h index 98b7cb3..0bf244d 100644 --- a/drivers/usb/chipidea/ci.h +++ b/drivers/usb/chipidea/ci.h @@ -450,7 +450,7 @@ void hw_phymode_configure(struct ci_hdrc *ci); void ci_platform_configure(struct ci_hdrc *ci); -int dbg_create_files(struct ci_hdrc *ci); +void dbg_create_files(struct ci_hdrc *ci); void dbg_remove_files(struct ci_hdrc *ci); #endif /* __DRIVERS_USB_CHIPIDEA_CI_H */ diff --git a/drivers/usb/chipidea/core.c b/drivers/usb/chipidea/core.c index 33ae87f..85fc6db 100644 --- a/drivers/usb/chipidea/core.c +++ b/drivers/usb/chipidea/core.c @@ -1062,9 +1062,7 @@ static int ci_hdrc_probe(struct platform_device *pdev) ci_hdrc_otg_fsm_start(ci); device_set_wakeup_capable(&pdev->dev, true); - ret = dbg_create_files(ci); - if (ret) - goto stop; + dbg_create_files(ci); ret = sysfs_create_group(&dev->kobj, &ci_attr_group); if (ret) diff --git a/drivers/usb/chipidea/debug.c b/drivers/usb/chipidea/debug.c index ce648cb..fcc91a3 100644 --- a/drivers/usb/chipidea/debug.c +++ b/drivers/usb/chipidea/debug.c @@ -340,54 +340,28 @@ DEFINE_SHOW_ATTRIBUTE(ci_registers); * * This function returns an error code */ -int dbg_create_files(struct ci_hdrc *ci) +void dbg_create_files(struct ci_hdrc *ci) { - struct dentry *dent; - ci->debugfs = debugfs_create_dir(dev_name(ci->dev), NULL); - if (!ci->debugfs) - return -ENOMEM; - - dent = debugfs_create_file("device", S_IRUGO, ci->debugfs, ci, - &ci_device_fops); - if (!dent) - goto err; - - dent = debugfs_create_file("port_test", S_IRUGO | S_IWUSR, ci->debugfs, - ci, &ci_port_test_fops); - if (!dent) - goto err; - - dent = debugfs_create_file("qheads", S_IRUGO, ci->debugfs, ci, - &ci_qheads_fops); - if (!dent) - goto err; - dent = debugfs_create_file("requests", S_IRUGO, ci->debugfs, ci, - &ci_requests_fops); - if (!dent) - goto err; + debugfs_create_file("device", S_IRUGO, ci->debugfs, ci, + &ci_device_fops); + debugfs_create_file("port_test", S_IRUGO | S_IWUSR, ci->debugfs, ci, + &ci_port_test_fops); + debugfs_create_file("qheads", S_IRUGO, ci->debugfs, ci, + &ci_qheads_fops); + debugfs_create_file("requests", S_IRUGO, ci->debugfs, ci, + &ci_requests_fops); if (ci_otg_is_fsm_mode(ci)) { - dent = debugfs_create_file("otg", S_IRUGO, ci->debugfs, ci, - &ci_otg_fops); - if (!dent) - goto err; + debugfs_create_file("otg", S_IRUGO, ci->debugfs, ci, + &ci_otg_fops); } - dent = debugfs_create_file("role", S_IRUGO | S_IWUSR, ci->debugfs, ci, - &ci_role_fops); - if (!dent) - goto err; - - dent = debugfs_create_file("registers", S_IRUGO, ci->debugfs, ci, - &ci_registers_fops); - - if (dent) - return 0; -err: - debugfs_remove_recursive(ci->debugfs); - return -ENOMEM; + debugfs_create_file("role", S_IRUGO | S_IWUSR, ci->debugfs, ci, + &ci_role_fops); + debugfs_create_file("registers", S_IRUGO, ci->debugfs, ci, + &ci_registers_fops); } /** -- cgit v1.1 From b708692dda1edfc357dceca8219c79466778b777 Mon Sep 17 00:00:00 2001 From: Greg Kroah-Hartman Date: Tue, 29 May 2018 17:30:59 +0200 Subject: USB: core: no need to check return value of debugfs_create functions When calling debugfs functions, there is no need to ever check the return value. The function can work or not, but the code logic should never do something different based on this. Cc: Johan Hovold Cc: Kai-Heng Feng Cc: Peter Chen Signed-off-by: Greg Kroah-Hartman --- drivers/usb/core/usb.c | 26 +++++--------------------- 1 file changed, 5 insertions(+), 21 deletions(-) (limited to 'drivers/usb') diff --git a/drivers/usb/core/usb.c b/drivers/usb/core/usb.c index 0adb634..623be31 100644 --- a/drivers/usb/core/usb.c +++ b/drivers/usb/core/usb.c @@ -1167,30 +1167,16 @@ static struct notifier_block usb_bus_nb = { struct dentry *usb_debug_root; EXPORT_SYMBOL_GPL(usb_debug_root); -static struct dentry *usb_debug_devices; - -static int usb_debugfs_init(void) +static void usb_debugfs_init(void) { usb_debug_root = debugfs_create_dir("usb", NULL); - if (!usb_debug_root) - return -ENOENT; - - usb_debug_devices = debugfs_create_file("devices", 0444, - usb_debug_root, NULL, - &usbfs_devices_fops); - if (!usb_debug_devices) { - debugfs_remove(usb_debug_root); - usb_debug_root = NULL; - return -ENOENT; - } - - return 0; + debugfs_create_file("devices", 0444, usb_debug_root, NULL, + &usbfs_devices_fops); } static void usb_debugfs_cleanup(void) { - debugfs_remove(usb_debug_devices); - debugfs_remove(usb_debug_root); + debugfs_remove_recursive(usb_debug_root); } /* @@ -1205,9 +1191,7 @@ static int __init usb_init(void) } usb_init_pool_max(); - retval = usb_debugfs_init(); - if (retval) - goto out; + usb_debugfs_init(); usb_acpi_register(); retval = bus_register(&usb_bus_type); -- cgit v1.1 From 1dcd5696204af6f2f5e2a89d6ef7560a74cd41e7 Mon Sep 17 00:00:00 2001 From: Greg Kroah-Hartman Date: Tue, 29 May 2018 17:31:00 +0200 Subject: USB: dwc2: no need to check return value of debugfs_create functions When calling debugfs functions, there is no need to ever check the return value. The function can work or not, but the code logic should never do something different based on this. Cc: Minas Harutyunyan Signed-off-by: Greg Kroah-Hartman --- drivers/usb/dwc2/debugfs.c | 78 ++++++++++------------------------------------ 1 file changed, 16 insertions(+), 62 deletions(-) (limited to 'drivers/usb') diff --git a/drivers/usb/dwc2/debugfs.c b/drivers/usb/dwc2/debugfs.c index 7e6618a..d0bdb79 100644 --- a/drivers/usb/dwc2/debugfs.c +++ b/drivers/usb/dwc2/debugfs.c @@ -294,52 +294,30 @@ DEFINE_SHOW_ATTRIBUTE(ep); static void dwc2_hsotg_create_debug(struct dwc2_hsotg *hsotg) { struct dentry *root; - struct dentry *file; unsigned int epidx; root = hsotg->debug_root; /* create general state file */ - - file = debugfs_create_file("state", 0444, root, hsotg, &state_fops); - if (IS_ERR(file)) - dev_err(hsotg->dev, "%s: failed to create state\n", __func__); - - file = debugfs_create_file("testmode", 0644, root, hsotg, - &testmode_fops); - if (IS_ERR(file)) - dev_err(hsotg->dev, "%s: failed to create testmode\n", - __func__); - - file = debugfs_create_file("fifo", 0444, root, hsotg, &fifo_fops); - if (IS_ERR(file)) - dev_err(hsotg->dev, "%s: failed to create fifo\n", __func__); + debugfs_create_file("state", 0444, root, hsotg, &state_fops); + debugfs_create_file("testmode", 0644, root, hsotg, &testmode_fops); + debugfs_create_file("fifo", 0444, root, hsotg, &fifo_fops); /* Create one file for each out endpoint */ for (epidx = 0; epidx < hsotg->num_of_eps; epidx++) { struct dwc2_hsotg_ep *ep; ep = hsotg->eps_out[epidx]; - if (ep) { - file = debugfs_create_file(ep->name, 0444, - root, ep, &ep_fops); - if (IS_ERR(file)) - dev_err(hsotg->dev, "failed to create %s debug file\n", - ep->name); - } + if (ep) + debugfs_create_file(ep->name, 0444, root, ep, &ep_fops); } /* Create one file for each in endpoint. EP0 is handled with out eps */ for (epidx = 1; epidx < hsotg->num_of_eps; epidx++) { struct dwc2_hsotg_ep *ep; ep = hsotg->eps_in[epidx]; - if (ep) { - file = debugfs_create_file(ep->name, 0444, - root, ep, &ep_fops); - if (IS_ERR(file)) - dev_err(hsotg->dev, "failed to create %s debug file\n", - ep->name); - } + if (ep) + debugfs_create_file(ep->name, 0444, root, ep, &ep_fops); } } #else @@ -792,32 +770,14 @@ DEFINE_SHOW_ATTRIBUTE(dr_mode); int dwc2_debugfs_init(struct dwc2_hsotg *hsotg) { int ret; - struct dentry *file; + struct dentry *root; - hsotg->debug_root = debugfs_create_dir(dev_name(hsotg->dev), NULL); - if (!hsotg->debug_root) { - ret = -ENOMEM; - goto err0; - } + root = debugfs_create_dir(dev_name(hsotg->dev), NULL); + hsotg->debug_root = root; - file = debugfs_create_file("params", 0444, - hsotg->debug_root, - hsotg, ¶ms_fops); - if (IS_ERR(file)) - dev_err(hsotg->dev, "%s: failed to create params\n", __func__); - - file = debugfs_create_file("hw_params", 0444, - hsotg->debug_root, - hsotg, &hw_params_fops); - if (IS_ERR(file)) - dev_err(hsotg->dev, "%s: failed to create hw_params\n", - __func__); - - file = debugfs_create_file("dr_mode", 0444, - hsotg->debug_root, - hsotg, &dr_mode_fops); - if (IS_ERR(file)) - dev_err(hsotg->dev, "%s: failed to create dr_mode\n", __func__); + debugfs_create_file("params", 0444, root, hsotg, ¶ms_fops); + debugfs_create_file("hw_params", 0444, root, hsotg, &hw_params_fops); + debugfs_create_file("dr_mode", 0444, root, hsotg, &dr_mode_fops); /* Add gadget debugfs nodes */ dwc2_hsotg_create_debug(hsotg); @@ -826,24 +786,18 @@ int dwc2_debugfs_init(struct dwc2_hsotg *hsotg) GFP_KERNEL); if (!hsotg->regset) { ret = -ENOMEM; - goto err1; + goto err; } hsotg->regset->regs = dwc2_regs; hsotg->regset->nregs = ARRAY_SIZE(dwc2_regs); hsotg->regset->base = hsotg->regs; - file = debugfs_create_regset32("regdump", 0444, hsotg->debug_root, - hsotg->regset); - if (!file) { - ret = -ENOMEM; - goto err1; - } + debugfs_create_regset32("regdump", 0444, root, hsotg->regset); return 0; -err1: +err: debugfs_remove_recursive(hsotg->debug_root); -err0: return ret; } -- cgit v1.1 From 535c8dc5c48034c7ef4521d94603fe4d9b8dd859 Mon Sep 17 00:00:00 2001 From: Greg Kroah-Hartman Date: Tue, 29 May 2018 17:31:01 +0200 Subject: USB: dwc3: no need to check return value of debugfs_create functions When calling debugfs functions, there is no need to ever check the return value. The function can work or not, but the code logic should never do something different based on this. Cc: Felipe Balbi Signed-off-by: Greg Kroah-Hartman --- drivers/usb/dwc3/debugfs.c | 43 +++++++++++-------------------------------- 1 file changed, 11 insertions(+), 32 deletions(-) (limited to 'drivers/usb') diff --git a/drivers/usb/dwc3/debugfs.c b/drivers/usb/dwc3/debugfs.c index 2f07be1..df8e73e 100644 --- a/drivers/usb/dwc3/debugfs.c +++ b/drivers/usb/dwc3/debugfs.c @@ -716,9 +716,6 @@ static void dwc3_debugfs_create_endpoint_dir(struct dwc3_ep *dep, struct dentry *dir; dir = debugfs_create_dir(dep->name, parent); - if (IS_ERR_OR_NULL(dir)) - return; - dwc3_debugfs_create_endpoint_files(dep, dir); } @@ -740,49 +737,31 @@ static void dwc3_debugfs_create_endpoint_dirs(struct dwc3 *dwc, void dwc3_debugfs_init(struct dwc3 *dwc) { struct dentry *root; - struct dentry *file; - - root = debugfs_create_dir(dev_name(dwc->dev), NULL); - if (IS_ERR_OR_NULL(root)) { - if (!root) - dev_err(dwc->dev, "Can't create debugfs root\n"); - return; - } - dwc->root = root; dwc->regset = kzalloc(sizeof(*dwc->regset), GFP_KERNEL); - if (!dwc->regset) { - debugfs_remove_recursive(root); + if (!dwc->regset) return; - } dwc->regset->regs = dwc3_regs; dwc->regset->nregs = ARRAY_SIZE(dwc3_regs); dwc->regset->base = dwc->regs - DWC3_GLOBALS_REGS_START; - file = debugfs_create_regset32("regdump", S_IRUGO, root, dwc->regset); - if (!file) - dev_dbg(dwc->dev, "Can't create debugfs regdump\n"); + root = debugfs_create_dir(dev_name(dwc->dev), NULL); + dwc->root = root; + + debugfs_create_regset32("regdump", S_IRUGO, root, dwc->regset); if (IS_ENABLED(CONFIG_USB_DWC3_DUAL_ROLE)) { - file = debugfs_create_file("mode", S_IRUGO | S_IWUSR, root, - dwc, &dwc3_mode_fops); - if (!file) - dev_dbg(dwc->dev, "Can't create debugfs mode\n"); + debugfs_create_file("mode", S_IRUGO | S_IWUSR, root, dwc, + &dwc3_mode_fops); } if (IS_ENABLED(CONFIG_USB_DWC3_DUAL_ROLE) || IS_ENABLED(CONFIG_USB_DWC3_GADGET)) { - file = debugfs_create_file("testmode", S_IRUGO | S_IWUSR, root, - dwc, &dwc3_testmode_fops); - if (!file) - dev_dbg(dwc->dev, "Can't create debugfs testmode\n"); - - file = debugfs_create_file("link_state", S_IRUGO | S_IWUSR, - root, dwc, &dwc3_link_state_fops); - if (!file) - dev_dbg(dwc->dev, "Can't create debugfs link_state\n"); - + debugfs_create_file("testmode", S_IRUGO | S_IWUSR, root, dwc, + &dwc3_testmode_fops); + debugfs_create_file("link_state", S_IRUGO | S_IWUSR, root, dwc, + &dwc3_link_state_fops); dwc3_debugfs_create_endpoint_dirs(dwc, root); } } -- cgit v1.1 From a143dca4f3340dfc6febd7a4022c6ffb2bf2dad4 Mon Sep 17 00:00:00 2001 From: Greg Kroah-Hartman Date: Tue, 29 May 2018 17:31:02 +0200 Subject: USB: udc: atmel_usba_udc: no need to check return value of debugfs_create functions When calling debugfs functions, there is no need to ever check the return value. The function can work or not, but the code logic should never do something different based on this. There is also no need to keep the file dentries around at all, so remove those variables from the device structure. Cc: Nicolas Ferre Cc: Felipe Balbi Reviewed-by: Alexandre Belloni Signed-off-by: Greg Kroah-Hartman --- drivers/usb/gadget/udc/atmel_usba_udc.c | 71 +++++---------------------------- drivers/usb/gadget/udc/atmel_usba_udc.h | 4 -- 2 files changed, 11 insertions(+), 64 deletions(-) (limited to 'drivers/usb') diff --git a/drivers/usb/gadget/udc/atmel_usba_udc.c b/drivers/usb/gadget/udc/atmel_usba_udc.c index 2f586f2..a4d99bf 100644 --- a/drivers/usb/gadget/udc/atmel_usba_udc.c +++ b/drivers/usb/gadget/udc/atmel_usba_udc.c @@ -206,94 +206,45 @@ static void usba_ep_init_debugfs(struct usba_udc *udc, struct dentry *ep_root; ep_root = debugfs_create_dir(ep->ep.name, udc->debugfs_root); - if (!ep_root) - goto err_root; ep->debugfs_dir = ep_root; - ep->debugfs_queue = debugfs_create_file("queue", 0400, ep_root, - ep, &queue_dbg_fops); - if (!ep->debugfs_queue) - goto err_queue; - - if (ep->can_dma) { - ep->debugfs_dma_status - = debugfs_create_u32("dma_status", 0400, ep_root, - &ep->last_dma_status); - if (!ep->debugfs_dma_status) - goto err_dma_status; - } - if (ep_is_control(ep)) { - ep->debugfs_state - = debugfs_create_u32("state", 0400, ep_root, - &ep->state); - if (!ep->debugfs_state) - goto err_state; - } - - return; - -err_state: + debugfs_create_file("queue", 0400, ep_root, ep, &queue_dbg_fops); if (ep->can_dma) - debugfs_remove(ep->debugfs_dma_status); -err_dma_status: - debugfs_remove(ep->debugfs_queue); -err_queue: - debugfs_remove(ep_root); -err_root: - dev_err(&ep->udc->pdev->dev, - "failed to create debugfs directory for %s\n", ep->ep.name); + debugfs_create_u32("dma_status", 0400, ep_root, + &ep->last_dma_status); + if (ep_is_control(ep)) + debugfs_create_u32("state", 0400, ep_root, &ep->state); } static void usba_ep_cleanup_debugfs(struct usba_ep *ep) { - debugfs_remove(ep->debugfs_queue); - debugfs_remove(ep->debugfs_dma_status); - debugfs_remove(ep->debugfs_state); - debugfs_remove(ep->debugfs_dir); - ep->debugfs_dma_status = NULL; - ep->debugfs_dir = NULL; + debugfs_remove_recursive(ep->debugfs_dir); } static void usba_init_debugfs(struct usba_udc *udc) { - struct dentry *root, *regs; + struct dentry *root; struct resource *regs_resource; root = debugfs_create_dir(udc->gadget.name, NULL); - if (IS_ERR(root) || !root) - goto err_root; udc->debugfs_root = root; regs_resource = platform_get_resource(udc->pdev, IORESOURCE_MEM, CTRL_IOMEM_ID); if (regs_resource) { - regs = debugfs_create_file_size("regs", 0400, root, udc, - ®s_dbg_fops, - resource_size(regs_resource)); - if (!regs) - goto err_regs; - udc->debugfs_regs = regs; + debugfs_create_file_size("regs", 0400, root, udc, + ®s_dbg_fops, + resource_size(regs_resource)); } usba_ep_init_debugfs(udc, to_usba_ep(udc->gadget.ep0)); - - return; - -err_regs: - debugfs_remove(root); -err_root: - udc->debugfs_root = NULL; - dev_err(&udc->pdev->dev, "debugfs is not available\n"); } static void usba_cleanup_debugfs(struct usba_udc *udc) { usba_ep_cleanup_debugfs(to_usba_ep(udc->gadget.ep0)); - debugfs_remove(udc->debugfs_regs); - debugfs_remove(udc->debugfs_root); - udc->debugfs_regs = NULL; - udc->debugfs_root = NULL; + debugfs_remove_recursive(udc->debugfs_root); } #else static inline void usba_ep_init_debugfs(struct usba_udc *udc, diff --git a/drivers/usb/gadget/udc/atmel_usba_udc.h b/drivers/usb/gadget/udc/atmel_usba_udc.h index d7eb7cf..030bf79 100644 --- a/drivers/usb/gadget/udc/atmel_usba_udc.h +++ b/drivers/usb/gadget/udc/atmel_usba_udc.h @@ -287,9 +287,6 @@ struct usba_ep { #ifdef CONFIG_USB_GADGET_DEBUG_FS u32 last_dma_status; struct dentry *debugfs_dir; - struct dentry *debugfs_queue; - struct dentry *debugfs_dma_status; - struct dentry *debugfs_state; #endif }; @@ -344,7 +341,6 @@ struct usba_udc { #ifdef CONFIG_USB_GADGET_DEBUG_FS struct dentry *debugfs_root; - struct dentry *debugfs_regs; #endif struct regmap *pmc; -- cgit v1.1 From da281a8e972fa97cf74344a98eb415116744b569 Mon Sep 17 00:00:00 2001 From: Greg Kroah-Hartman Date: Tue, 29 May 2018 17:31:03 +0200 Subject: USB: gadget: udc: bcm63xx_udc: no need to check return value of debugfs_create functions When calling debugfs functions, there is no need to ever check the return value. The function can work or not, but the code logic should never do something different based on this. There is also no need to keep the file dentries around at all, so remove those variables from the device structure. Cc: Kevin Cernekee Cc: Felipe Balbi Cc: Florian Fainelli Signed-off-by: Greg Kroah-Hartman --- drivers/usb/gadget/udc/bcm63xx_udc.c | 37 +++++------------------------------- 1 file changed, 5 insertions(+), 32 deletions(-) (limited to 'drivers/usb') diff --git a/drivers/usb/gadget/udc/bcm63xx_udc.c b/drivers/usb/gadget/udc/bcm63xx_udc.c index 3a8df86..c1fcc77 100644 --- a/drivers/usb/gadget/udc/bcm63xx_udc.c +++ b/drivers/usb/gadget/udc/bcm63xx_udc.c @@ -288,8 +288,6 @@ struct bcm63xx_req { * @ep0_reply: Pending reply from gadget driver. * @ep0_request: Outstanding ep0 request. * @debugfs_root: debugfs directory: /sys/kernel/debug/. - * @debugfs_usbd: debugfs file "usbd" for controller state. - * @debugfs_iudma: debugfs file "usbd" for IUDMA state. */ struct bcm63xx_udc { spinlock_t lock; @@ -330,8 +328,6 @@ struct bcm63xx_udc { struct usb_request *ep0_request; struct dentry *debugfs_root; - struct dentry *debugfs_usbd; - struct dentry *debugfs_iudma; }; static const struct usb_ep_ops bcm63xx_udc_ep_ops; @@ -2247,34 +2243,16 @@ DEFINE_SHOW_ATTRIBUTE(bcm63xx_iudma_dbg); */ static void bcm63xx_udc_init_debugfs(struct bcm63xx_udc *udc) { - struct dentry *root, *usbd, *iudma; + struct dentry *root; if (!IS_ENABLED(CONFIG_USB_GADGET_DEBUG_FS)) return; root = debugfs_create_dir(udc->gadget.name, NULL); - if (IS_ERR(root) || !root) - goto err_root; - - usbd = debugfs_create_file("usbd", 0400, root, udc, - &bcm63xx_usbd_dbg_fops); - if (!usbd) - goto err_usbd; - iudma = debugfs_create_file("iudma", 0400, root, udc, - &bcm63xx_iudma_dbg_fops); - if (!iudma) - goto err_iudma; - udc->debugfs_root = root; - udc->debugfs_usbd = usbd; - udc->debugfs_iudma = iudma; - return; -err_iudma: - debugfs_remove(usbd); -err_usbd: - debugfs_remove(root); -err_root: - dev_err(udc->dev, "debugfs is not available\n"); + + debugfs_create_file("usbd", 0400, root, udc, &bcm63xx_usbd_dbg_fops); + debugfs_create_file("iudma", 0400, root, udc, &bcm63xx_iudma_dbg_fops); } /** @@ -2285,12 +2263,7 @@ err_root: */ static void bcm63xx_udc_cleanup_debugfs(struct bcm63xx_udc *udc) { - debugfs_remove(udc->debugfs_iudma); - debugfs_remove(udc->debugfs_usbd); - debugfs_remove(udc->debugfs_root); - udc->debugfs_iudma = NULL; - udc->debugfs_usbd = NULL; - udc->debugfs_root = NULL; + debugfs_remove_recursive(udc->debugfs_root); } /*********************************************************************** -- cgit v1.1 From 37ea71074d13e06bbceeef6d465df81c86c99860 Mon Sep 17 00:00:00 2001 From: Greg Kroah-Hartman Date: Tue, 29 May 2018 17:31:04 +0200 Subject: USB: gadget: udc: gr_udc: no need to check return value of debugfs_create functions When calling debugfs functions, there is no need to ever check the return value. The function can work or not, but the code logic should never do something different based on this. There is also no need to keep the file dentries around at all, so remove those variables from the device structure. Cc: Felipe Balbi Cc: Andy Shevchenko Cc: "Paul E. McKenney" Cc: Mark Rutland Cc: Jaejoong Kim Cc: Li Yang Cc: Johan Hovold Cc: Robert Jarzmik Signed-off-by: Greg Kroah-Hartman --- drivers/usb/gadget/udc/gr_udc.c | 7 ++----- drivers/usb/gadget/udc/gr_udc.h | 1 - 2 files changed, 2 insertions(+), 6 deletions(-) (limited to 'drivers/usb') diff --git a/drivers/usb/gadget/udc/gr_udc.c b/drivers/usb/gadget/udc/gr_udc.c index ca83c15..729e60e 100644 --- a/drivers/usb/gadget/udc/gr_udc.c +++ b/drivers/usb/gadget/udc/gr_udc.c @@ -209,15 +209,12 @@ static void gr_dfs_create(struct gr_udc *dev) const char *name = "gr_udc_state"; dev->dfs_root = debugfs_create_dir(dev_name(dev->dev), NULL); - dev->dfs_state = debugfs_create_file(name, 0444, dev->dfs_root, dev, - &gr_dfs_fops); + debugfs_create_file(name, 0444, dev->dfs_root, dev, &gr_dfs_fops); } static void gr_dfs_delete(struct gr_udc *dev) { - /* Handles NULL and ERR pointers internally */ - debugfs_remove(dev->dfs_state); - debugfs_remove(dev->dfs_root); + debugfs_remove_recursive(dev->dfs_root); } #else /* !CONFIG_USB_GADGET_DEBUG_FS */ diff --git a/drivers/usb/gadget/udc/gr_udc.h b/drivers/usb/gadget/udc/gr_udc.h index 3e91326..417ad2a 100644 --- a/drivers/usb/gadget/udc/gr_udc.h +++ b/drivers/usb/gadget/udc/gr_udc.h @@ -217,7 +217,6 @@ struct gr_udc { spinlock_t lock; /* General lock, a.k.a. "dev->lock" in comments */ struct dentry *dfs_root; - struct dentry *dfs_state; }; #define to_gr_udc(gadget) (container_of((gadget), struct gr_udc, gadget)) -- cgit v1.1 From edbeb6bc696ec727815bc6b17f7c29f4102d94b6 Mon Sep 17 00:00:00 2001 From: Greg Kroah-Hartman Date: Tue, 29 May 2018 17:31:05 +0200 Subject: USB: gadget: udc: pxa27x_udc: no need to check return value of debugfs_create functions When calling debugfs functions, there is no need to ever check the return value. The function can work or not, but the code logic should never do something different based on this. There is also no need to keep the file dentries around at all, so remove those variables from the device structure. Cc: Daniel Mack Cc: Haojian Zhuang Cc: Felipe Balbi Acked-by: Robert Jarzmik Signed-off-by: Greg Kroah-Hartman --- drivers/usb/gadget/udc/pxa27x_udc.c | 43 ++++++------------------------------- drivers/usb/gadget/udc/pxa27x_udc.h | 3 --- 2 files changed, 6 insertions(+), 40 deletions(-) (limited to 'drivers/usb') diff --git a/drivers/usb/gadget/udc/pxa27x_udc.c b/drivers/usb/gadget/udc/pxa27x_udc.c index a58242e..0142332 100644 --- a/drivers/usb/gadget/udc/pxa27x_udc.c +++ b/drivers/usb/gadget/udc/pxa27x_udc.c @@ -205,50 +205,19 @@ DEFINE_SHOW_ATTRIBUTE(eps_dbg); static void pxa_init_debugfs(struct pxa_udc *udc) { - struct dentry *root, *state, *queues, *eps; + struct dentry *root; root = debugfs_create_dir(udc->gadget.name, NULL); - if (IS_ERR(root) || !root) - goto err_root; - - state = debugfs_create_file("udcstate", 0400, root, udc, - &state_dbg_fops); - if (!state) - goto err_state; - queues = debugfs_create_file("queues", 0400, root, udc, - &queues_dbg_fops); - if (!queues) - goto err_queues; - eps = debugfs_create_file("epstate", 0400, root, udc, - &eps_dbg_fops); - if (!eps) - goto err_eps; - udc->debugfs_root = root; - udc->debugfs_state = state; - udc->debugfs_queues = queues; - udc->debugfs_eps = eps; - return; -err_eps: - debugfs_remove(eps); -err_queues: - debugfs_remove(queues); -err_state: - debugfs_remove(root); -err_root: - dev_err(udc->dev, "debugfs is not available\n"); + + debugfs_create_file("udcstate", 0400, root, udc, &state_dbg_fops); + debugfs_create_file("queues", 0400, root, udc, &queues_dbg_fops); + debugfs_create_file("epstate", 0400, root, udc, &eps_dbg_fops); } static void pxa_cleanup_debugfs(struct pxa_udc *udc) { - debugfs_remove(udc->debugfs_eps); - debugfs_remove(udc->debugfs_queues); - debugfs_remove(udc->debugfs_state); - debugfs_remove(udc->debugfs_root); - udc->debugfs_eps = NULL; - udc->debugfs_queues = NULL; - udc->debugfs_state = NULL; - udc->debugfs_root = NULL; + debugfs_remove_recursive(udc->debugfs_root); } #else diff --git a/drivers/usb/gadget/udc/pxa27x_udc.h b/drivers/usb/gadget/udc/pxa27x_udc.h index 1128d39..13b2977 100644 --- a/drivers/usb/gadget/udc/pxa27x_udc.h +++ b/drivers/usb/gadget/udc/pxa27x_udc.h @@ -476,9 +476,6 @@ struct pxa_udc { #endif #ifdef CONFIG_USB_GADGET_DEBUG_FS struct dentry *debugfs_root; - struct dentry *debugfs_state; - struct dentry *debugfs_queues; - struct dentry *debugfs_eps; #endif }; #define to_pxa(g) (container_of((g), struct pxa_udc, gadget)) -- cgit v1.1 From 743d1effe6c1c6b2b42e9e4ca958a4403373702d Mon Sep 17 00:00:00 2001 From: Greg Kroah-Hartman Date: Tue, 29 May 2018 17:31:06 +0200 Subject: USB: gadget: udc: renesas_usb3: no need to check return value of debugfs_create functions When calling debugfs functions, there is no need to ever check the return value. The function can work or not, but the code logic should never do something different based on this. Cc: Felipe Balbi Cc: Simon Horman Cc: Geert Uytterhoeven Acked-by: Yoshihiro Shimoda Signed-off-by: Greg Kroah-Hartman --- drivers/usb/gadget/udc/renesas_usb3.c | 18 +++--------------- 1 file changed, 3 insertions(+), 15 deletions(-) (limited to 'drivers/usb') diff --git a/drivers/usb/gadget/udc/renesas_usb3.c b/drivers/usb/gadget/udc/renesas_usb3.c index 5caf78b..977ea1a0 100644 --- a/drivers/usb/gadget/udc/renesas_usb3.c +++ b/drivers/usb/gadget/udc/renesas_usb3.c @@ -2391,22 +2391,10 @@ static const struct file_operations renesas_usb3_b_device_fops = { static void renesas_usb3_debugfs_init(struct renesas_usb3 *usb3, struct device *dev) { - struct dentry *root, *file; + usb3->dentry = debugfs_create_dir(dev_name(dev), NULL); - root = debugfs_create_dir(dev_name(dev), NULL); - if (IS_ERR_OR_NULL(root)) { - dev_info(dev, "%s: Can't create the root\n", __func__); - return; - } - - file = debugfs_create_file("b_device", 0644, root, usb3, - &renesas_usb3_b_device_fops); - if (!file) { - dev_info(dev, "%s: Can't create debugfs mode\n", __func__); - debugfs_remove_recursive(root); - } else { - usb3->dentry = root; - } + debugfs_create_file("b_device", 0644, usb3->dentry, usb3, + &renesas_usb3_b_device_fops); } /*------- platform_driver ------------------------------------------------*/ -- cgit v1.1 From e15bea0f3f75d4ee8f13b5ea76dcd210b24ef226 Mon Sep 17 00:00:00 2001 From: Greg Kroah-Hartman Date: Tue, 29 May 2018 17:31:07 +0200 Subject: USB: gadget: udc: s3c2410_udc: no need to check return value of debugfs_create functions When calling debugfs functions, there is no need to ever check the return value. The function can work or not, but the code logic should never do something different based on this. Cc: Felipe Balbi Cc: Li Yang Cc: Nicolas Ferre Cc: Robert Jarzmik Signed-off-by: Greg Kroah-Hartman --- drivers/usb/gadget/udc/s3c2410_udc.c | 17 ++++------------- 1 file changed, 4 insertions(+), 13 deletions(-) (limited to 'drivers/usb') diff --git a/drivers/usb/gadget/udc/s3c2410_udc.c b/drivers/usb/gadget/udc/s3c2410_udc.c index f154f49..8bf5ad7 100644 --- a/drivers/usb/gadget/udc/s3c2410_udc.c +++ b/drivers/usb/gadget/udc/s3c2410_udc.c @@ -1871,13 +1871,9 @@ static int s3c2410_udc_probe(struct platform_device *pdev) if (retval) goto err_add_udc; - if (s3c2410_udc_debugfs_root) { - udc->regs_info = debugfs_create_file("registers", S_IRUGO, - s3c2410_udc_debugfs_root, - udc, &s3c2410_udc_debugfs_fops); - if (!udc->regs_info) - dev_warn(dev, "debugfs file creation failed\n"); - } + udc->regs_info = debugfs_create_file("registers", S_IRUGO, + s3c2410_udc_debugfs_root, udc, + &s3c2410_udc_debugfs_fops); dev_dbg(dev, "probe ok\n"); @@ -1994,11 +1990,6 @@ static int __init udc_init(void) dprintk(DEBUG_NORMAL, "%s\n", gadget_name); s3c2410_udc_debugfs_root = debugfs_create_dir(gadget_name, NULL); - if (IS_ERR(s3c2410_udc_debugfs_root)) { - pr_err("%s: debugfs dir creation failed %ld\n", - gadget_name, PTR_ERR(s3c2410_udc_debugfs_root)); - s3c2410_udc_debugfs_root = NULL; - } retval = platform_driver_register(&udc_driver_24x0); if (retval) @@ -2014,7 +2005,7 @@ err: static void __exit udc_exit(void) { platform_driver_unregister(&udc_driver_24x0); - debugfs_remove(s3c2410_udc_debugfs_root); + debugfs_remove_recursive(s3c2410_udc_debugfs_root); } module_init(udc_init); -- cgit v1.1 From bc9832c4a1921a662870d51f81a699ec8c18545f Mon Sep 17 00:00:00 2001 From: Greg Kroah-Hartman Date: Thu, 31 May 2018 13:08:54 +0200 Subject: USB: typec: fsusb302: no need to check return value of debugfs_create_dir() When calling debugfs functions, there is no need to ever check the return value. The function can work or not, but the code logic should never do something different based on this. Clean up the fsusb302 driver to not care if the root directory was created, as the code should work properly either way. Cc: Heikki Krogerus Cc: Hans de Goede Cc: Andy Shevchenko Cc: Adam Thomson Reviewed-by: Guenter Roeck Signed-off-by: Greg Kroah-Hartman --- drivers/usb/typec/fusb302/fusb302.c | 15 ++++----------- 1 file changed, 4 insertions(+), 11 deletions(-) (limited to 'drivers/usb') diff --git a/drivers/usb/typec/fusb302/fusb302.c b/drivers/usb/typec/fusb302/fusb302.c index 9c1eba9..1e68da1 100644 --- a/drivers/usb/typec/fusb302/fusb302.c +++ b/drivers/usb/typec/fusb302/fusb302.c @@ -215,20 +215,15 @@ DEFINE_SHOW_ATTRIBUTE(fusb302_debug); static struct dentry *rootdir; -static int fusb302_debugfs_init(struct fusb302_chip *chip) +static void fusb302_debugfs_init(struct fusb302_chip *chip) { mutex_init(&chip->logbuffer_lock); - if (!rootdir) { + if (!rootdir) rootdir = debugfs_create_dir("fusb302", NULL); - if (!rootdir) - return -ENOMEM; - } chip->dentry = debugfs_create_file(dev_name(chip->dev), S_IFREG | 0444, rootdir, chip, &fusb302_debug_fops); - - return 0; } static void fusb302_debugfs_exit(struct fusb302_chip *chip) @@ -241,7 +236,7 @@ static void fusb302_debugfs_exit(struct fusb302_chip *chip) static void fusb302_log(const struct fusb302_chip *chip, const char *fmt, ...) { } -static int fusb302_debugfs_init(const struct fusb302_chip *chip) { return 0; } +static void fusb302_debugfs_init(const struct fusb302_chip *chip) { } static void fusb302_debugfs_exit(const struct fusb302_chip *chip) { } #endif @@ -1773,9 +1768,7 @@ static int fusb302_probe(struct i2c_client *client, return -EPROBE_DEFER; } - ret = fusb302_debugfs_init(chip); - if (ret < 0) - return ret; + fusb302_debugfs_init(chip); chip->wq = create_singlethread_workqueue(dev_name(chip->dev)); if (!chip->wq) { -- cgit v1.1 From a965315e59f3cbceb5d27d0feb68a456544f0f8d Mon Sep 17 00:00:00 2001 From: Adam Wallis Date: Tue, 22 May 2018 14:55:32 -0400 Subject: usb: xhci: force all memory allocations to node The xhci driver forces DMA memory to be node aware, however, there are several ring-related memory allocations that are not memory node aware. This patch resolves those *alloc functions to be allocated on the proper memory node. Signed-off-by: Adam Wallis Acked-by: Mathias Nyman Signed-off-by: Greg Kroah-Hartman --- drivers/usb/host/xhci-mem.c | 57 ++++++++++++++++++++++++++++++--------------- 1 file changed, 38 insertions(+), 19 deletions(-) (limited to 'drivers/usb') diff --git a/drivers/usb/host/xhci-mem.c b/drivers/usb/host/xhci-mem.c index 0b61b77..4fe7471 100644 --- a/drivers/usb/host/xhci-mem.c +++ b/drivers/usb/host/xhci-mem.c @@ -33,8 +33,9 @@ static struct xhci_segment *xhci_segment_alloc(struct xhci_hcd *xhci, struct xhci_segment *seg; dma_addr_t dma; int i; + struct device *dev = xhci_to_hcd(xhci)->self.sysdev; - seg = kzalloc(sizeof *seg, flags); + seg = kzalloc_node(sizeof(*seg), flags, dev_to_node(dev)); if (!seg) return NULL; @@ -45,7 +46,8 @@ static struct xhci_segment *xhci_segment_alloc(struct xhci_hcd *xhci, } if (max_packet) { - seg->bounce_buf = kzalloc(max_packet, flags); + seg->bounce_buf = kzalloc_node(max_packet, flags, + dev_to_node(dev)); if (!seg->bounce_buf) { dma_pool_free(xhci->segment_pool, seg->trbs, dma); kfree(seg); @@ -363,8 +365,9 @@ struct xhci_ring *xhci_ring_alloc(struct xhci_hcd *xhci, { struct xhci_ring *ring; int ret; + struct device *dev = xhci_to_hcd(xhci)->self.sysdev; - ring = kzalloc(sizeof *(ring), flags); + ring = kzalloc_node(sizeof(*ring), flags, dev_to_node(dev)); if (!ring) return NULL; @@ -458,11 +461,12 @@ struct xhci_container_ctx *xhci_alloc_container_ctx(struct xhci_hcd *xhci, int type, gfp_t flags) { struct xhci_container_ctx *ctx; + struct device *dev = xhci_to_hcd(xhci)->self.sysdev; if ((type != XHCI_CTX_TYPE_DEVICE) && (type != XHCI_CTX_TYPE_INPUT)) return NULL; - ctx = kzalloc(sizeof(*ctx), flags); + ctx = kzalloc_node(sizeof(*ctx), flags, dev_to_node(dev)); if (!ctx) return NULL; @@ -615,6 +619,7 @@ struct xhci_stream_info *xhci_alloc_stream_info(struct xhci_hcd *xhci, struct xhci_ring *cur_ring; u64 addr; int ret; + struct device *dev = xhci_to_hcd(xhci)->self.sysdev; xhci_dbg(xhci, "Allocating %u streams and %u " "stream context array entries.\n", @@ -625,7 +630,8 @@ struct xhci_stream_info *xhci_alloc_stream_info(struct xhci_hcd *xhci, } xhci->cmd_ring_reserved_trbs++; - stream_info = kzalloc(sizeof(struct xhci_stream_info), mem_flags); + stream_info = kzalloc_node(sizeof(*stream_info), mem_flags, + dev_to_node(dev)); if (!stream_info) goto cleanup_trbs; @@ -633,9 +639,9 @@ struct xhci_stream_info *xhci_alloc_stream_info(struct xhci_hcd *xhci, stream_info->num_stream_ctxs = num_stream_ctxs; /* Initialize the array of virtual pointers to stream rings. */ - stream_info->stream_rings = kzalloc( - sizeof(struct xhci_ring *)*num_streams, - mem_flags); + stream_info->stream_rings = kcalloc_node( + num_streams, sizeof(struct xhci_ring *), mem_flags, + dev_to_node(dev)); if (!stream_info->stream_rings) goto cleanup_info; @@ -831,6 +837,7 @@ int xhci_alloc_tt_info(struct xhci_hcd *xhci, struct xhci_tt_bw_info *tt_info; unsigned int num_ports; int i, j; + struct device *dev = xhci_to_hcd(xhci)->self.sysdev; if (!tt->multi) num_ports = 1; @@ -840,7 +847,8 @@ int xhci_alloc_tt_info(struct xhci_hcd *xhci, for (i = 0; i < num_ports; i++, tt_info++) { struct xhci_interval_bw_table *bw_table; - tt_info = kzalloc(sizeof(*tt_info), mem_flags); + tt_info = kzalloc_node(sizeof(*tt_info), mem_flags, + dev_to_node(dev)); if (!tt_info) goto free_tts; INIT_LIST_HEAD(&tt_info->tt_list); @@ -1641,7 +1649,8 @@ static int scratchpad_alloc(struct xhci_hcd *xhci, gfp_t flags) if (!num_sp) return 0; - xhci->scratchpad = kzalloc(sizeof(*xhci->scratchpad), flags); + xhci->scratchpad = kzalloc_node(sizeof(*xhci->scratchpad), flags, + dev_to_node(dev)); if (!xhci->scratchpad) goto fail_sp; @@ -1651,7 +1660,8 @@ static int scratchpad_alloc(struct xhci_hcd *xhci, gfp_t flags) if (!xhci->scratchpad->sp_array) goto fail_sp2; - xhci->scratchpad->sp_buffers = kzalloc(sizeof(void *) * num_sp, flags); + xhci->scratchpad->sp_buffers = kcalloc_node(num_sp, sizeof(void *), + flags, dev_to_node(dev)); if (!xhci->scratchpad->sp_buffers) goto fail_sp3; @@ -1719,14 +1729,16 @@ struct xhci_command *xhci_alloc_command(struct xhci_hcd *xhci, bool allocate_completion, gfp_t mem_flags) { struct xhci_command *command; + struct device *dev = xhci_to_hcd(xhci)->self.sysdev; - command = kzalloc(sizeof(*command), mem_flags); + command = kzalloc_node(sizeof(*command), mem_flags, dev_to_node(dev)); if (!command) return NULL; if (allocate_completion) { command->completion = - kzalloc(sizeof(struct completion), mem_flags); + kzalloc_node(sizeof(struct completion), mem_flags, + dev_to_node(dev)); if (!command->completion) { kfree(command); return NULL; @@ -2099,6 +2111,7 @@ static void xhci_add_in_port(struct xhci_hcd *xhci, unsigned int num_ports, int i; u8 major_revision, minor_revision; struct xhci_hub *rhub; + struct device *dev = xhci_to_hcd(xhci)->self.sysdev; temp = readl(addr); major_revision = XHCI_EXT_PORT_MAJOR(temp); @@ -2135,8 +2148,8 @@ static void xhci_add_in_port(struct xhci_hcd *xhci, unsigned int num_ports, rhub->psi_count = XHCI_EXT_PORT_PSIC(temp); if (rhub->psi_count) { - rhub->psi = kcalloc(rhub->psi_count, sizeof(*rhub->psi), - GFP_KERNEL); + rhub->psi = kcalloc_node(rhub->psi_count, sizeof(*rhub->psi), + GFP_KERNEL, dev_to_node(dev)); if (!rhub->psi) rhub->psi_count = 0; @@ -2214,10 +2227,12 @@ static void xhci_create_rhub_port_array(struct xhci_hcd *xhci, { int port_index = 0; int i; + struct device *dev = xhci_to_hcd(xhci)->self.sysdev; if (!rhub->num_ports) return; - rhub->ports = kcalloc(rhub->num_ports, sizeof(rhub->ports), flags); + rhub->ports = kcalloc_node(rhub->num_ports, sizeof(rhub->ports), flags, + dev_to_node(dev)); for (i = 0; i < HCS_MAX_PORTS(xhci->hcs_params1); i++) { if (xhci->hw_ports[i].rhub != rhub || xhci->hw_ports[i].hcd_portnum == DUPLICATE_ENTRY) @@ -2245,9 +2260,11 @@ static int xhci_setup_port_arrays(struct xhci_hcd *xhci, gfp_t flags) int i, j; int cap_count = 0; u32 cap_start; + struct device *dev = xhci_to_hcd(xhci)->self.sysdev; num_ports = HCS_MAX_PORTS(xhci->hcs_params1); - xhci->hw_ports = kcalloc(num_ports, sizeof(*xhci->hw_ports), flags); + xhci->hw_ports = kcalloc_node(num_ports, sizeof(*xhci->hw_ports), + flags, dev_to_node(dev)); if (!xhci->hw_ports) return -ENOMEM; @@ -2257,7 +2274,8 @@ static int xhci_setup_port_arrays(struct xhci_hcd *xhci, gfp_t flags) xhci->hw_ports[i].hw_portnum = i; } - xhci->rh_bw = kzalloc(sizeof(*xhci->rh_bw)*num_ports, flags); + xhci->rh_bw = kzalloc_node(sizeof(*xhci->rh_bw)*num_ports, flags, + dev_to_node(dev)); if (!xhci->rh_bw) return -ENOMEM; for (i = 0; i < num_ports; i++) { @@ -2284,7 +2302,8 @@ static int xhci_setup_port_arrays(struct xhci_hcd *xhci, gfp_t flags) XHCI_EXT_CAPS_PROTOCOL); } - xhci->ext_caps = kzalloc(sizeof(*xhci->ext_caps) * cap_count, flags); + xhci->ext_caps = kcalloc_node(cap_count, sizeof(*xhci->ext_caps), + flags, dev_to_node(dev)); if (!xhci->ext_caps) return -ENOMEM; -- cgit v1.1 From 36b6857932f380fcb55c31ac75857e3e81dd583a Mon Sep 17 00:00:00 2001 From: Marc Zyngier Date: Wed, 23 May 2018 18:41:36 +0100 Subject: xhci: Allow more than 32 quirks We now have 32 different quirks, and the field that holds them is full. Let's bump it up to the next stage so that we can handle some more... The type is now an unsigned long long, which is 64bit on most architectures. We take this opportunity to change the quirks from using (1 << x) to BIT_ULL(x). Tested-by: Domenico Andreoli Signed-off-by: Marc Zyngier Tested-by: Faiz Abbas Tested-by: Domenico Andreoli Acked-by: Mathias Nyman Signed-off-by: Greg Kroah-Hartman --- drivers/usb/host/xhci.c | 6 ++--- drivers/usb/host/xhci.h | 66 ++++++++++++++++++++++++------------------------- 2 files changed, 36 insertions(+), 36 deletions(-) (limited to 'drivers/usb') diff --git a/drivers/usb/host/xhci.c b/drivers/usb/host/xhci.c index 02e2697..02b5ea7 100644 --- a/drivers/usb/host/xhci.c +++ b/drivers/usb/host/xhci.c @@ -33,8 +33,8 @@ static int link_quirk; module_param(link_quirk, int, S_IRUGO | S_IWUSR); MODULE_PARM_DESC(link_quirk, "Don't clear the chain bit on a link TRB"); -static unsigned int quirks; -module_param(quirks, uint, S_IRUGO); +static unsigned long long quirks; +module_param(quirks, ullong, S_IRUGO); MODULE_PARM_DESC(quirks, "Bit flags for quirks to be enabled as default"); /* TODO: copied from ehci-hcd.c - can this be refactored? */ @@ -4959,7 +4959,7 @@ int xhci_gen_setup(struct usb_hcd *hcd, xhci_get_quirks_t get_quirks) return retval; xhci_dbg(xhci, "Called HCD init\n"); - xhci_info(xhci, "hcc params 0x%08x hci version 0x%x quirks 0x%08x\n", + xhci_info(xhci, "hcc params 0x%08x hci version 0x%x quirks 0x%016llx\n", xhci->hcc_params, xhci->hci_version, xhci->quirks); return 0; diff --git a/drivers/usb/host/xhci.h b/drivers/usb/host/xhci.h index 6c5f001..2303ee4 100644 --- a/drivers/usb/host/xhci.h +++ b/drivers/usb/host/xhci.h @@ -1797,12 +1797,12 @@ struct xhci_hcd { #define XHCI_STATE_DYING (1 << 0) #define XHCI_STATE_HALTED (1 << 1) #define XHCI_STATE_REMOVING (1 << 2) - unsigned int quirks; -#define XHCI_LINK_TRB_QUIRK (1 << 0) -#define XHCI_RESET_EP_QUIRK (1 << 1) -#define XHCI_NEC_HOST (1 << 2) -#define XHCI_AMD_PLL_FIX (1 << 3) -#define XHCI_SPURIOUS_SUCCESS (1 << 4) + unsigned long long quirks; +#define XHCI_LINK_TRB_QUIRK BIT_ULL(0) +#define XHCI_RESET_EP_QUIRK BIT_ULL(1) +#define XHCI_NEC_HOST BIT_ULL(2) +#define XHCI_AMD_PLL_FIX BIT_ULL(3) +#define XHCI_SPURIOUS_SUCCESS BIT_ULL(4) /* * Certain Intel host controllers have a limit to the number of endpoint * contexts they can handle. Ideally, they would signal that they can't handle @@ -1812,35 +1812,35 @@ struct xhci_hcd { * commands, reset device commands, disable slot commands, and address device * commands. */ -#define XHCI_EP_LIMIT_QUIRK (1 << 5) -#define XHCI_BROKEN_MSI (1 << 6) -#define XHCI_RESET_ON_RESUME (1 << 7) -#define XHCI_SW_BW_CHECKING (1 << 8) -#define XHCI_AMD_0x96_HOST (1 << 9) -#define XHCI_TRUST_TX_LENGTH (1 << 10) -#define XHCI_LPM_SUPPORT (1 << 11) -#define XHCI_INTEL_HOST (1 << 12) -#define XHCI_SPURIOUS_REBOOT (1 << 13) -#define XHCI_COMP_MODE_QUIRK (1 << 14) -#define XHCI_AVOID_BEI (1 << 15) -#define XHCI_PLAT (1 << 16) -#define XHCI_SLOW_SUSPEND (1 << 17) -#define XHCI_SPURIOUS_WAKEUP (1 << 18) +#define XHCI_EP_LIMIT_QUIRK BIT_ULL(5) +#define XHCI_BROKEN_MSI BIT_ULL(6) +#define XHCI_RESET_ON_RESUME BIT_ULL(7) +#define XHCI_SW_BW_CHECKING BIT_ULL(8) +#define XHCI_AMD_0x96_HOST BIT_ULL(9) +#define XHCI_TRUST_TX_LENGTH BIT_ULL(10) +#define XHCI_LPM_SUPPORT BIT_ULL(11) +#define XHCI_INTEL_HOST BIT_ULL(12) +#define XHCI_SPURIOUS_REBOOT BIT_ULL(13) +#define XHCI_COMP_MODE_QUIRK BIT_ULL(14) +#define XHCI_AVOID_BEI BIT_ULL(15) +#define XHCI_PLAT BIT_ULL(16) +#define XHCI_SLOW_SUSPEND BIT_ULL(17) +#define XHCI_SPURIOUS_WAKEUP BIT_ULL(18) /* For controllers with a broken beyond repair streams implementation */ -#define XHCI_BROKEN_STREAMS (1 << 19) -#define XHCI_PME_STUCK_QUIRK (1 << 20) -#define XHCI_MTK_HOST (1 << 21) -#define XHCI_SSIC_PORT_UNUSED (1 << 22) -#define XHCI_NO_64BIT_SUPPORT (1 << 23) -#define XHCI_MISSING_CAS (1 << 24) +#define XHCI_BROKEN_STREAMS BIT_ULL(19) +#define XHCI_PME_STUCK_QUIRK BIT_ULL(20) +#define XHCI_MTK_HOST BIT_ULL(21) +#define XHCI_SSIC_PORT_UNUSED BIT_ULL(22) +#define XHCI_NO_64BIT_SUPPORT BIT_ULL(23) +#define XHCI_MISSING_CAS BIT_ULL(24) /* For controller with a broken Port Disable implementation */ -#define XHCI_BROKEN_PORT_PED (1 << 25) -#define XHCI_LIMIT_ENDPOINT_INTERVAL_7 (1 << 26) -#define XHCI_U2_DISABLE_WAKE (1 << 27) -#define XHCI_ASMEDIA_MODIFY_FLOWCONTROL (1 << 28) -#define XHCI_HW_LPM_DISABLE (1 << 29) -#define XHCI_SUSPEND_DELAY (1 << 30) -#define XHCI_INTEL_USB_ROLE_SW (1 << 31) +#define XHCI_BROKEN_PORT_PED BIT_ULL(25) +#define XHCI_LIMIT_ENDPOINT_INTERVAL_7 BIT_ULL(26) +#define XHCI_U2_DISABLE_WAKE BIT_ULL(27) +#define XHCI_ASMEDIA_MODIFY_FLOWCONTROL BIT_ULL(28) +#define XHCI_HW_LPM_DISABLE BIT_ULL(29) +#define XHCI_SUSPEND_DELAY BIT_ULL(30) +#define XHCI_INTEL_USB_ROLE_SW BIT_ULL(31) unsigned int num_active_eps; unsigned int limit_active_eps; -- cgit v1.1 From 12de0a35c996c3a75d050bff748815db3432849c Mon Sep 17 00:00:00 2001 From: Marc Zyngier Date: Wed, 23 May 2018 18:41:37 +0100 Subject: xhci: Add quirk to zero 64bit registers on Renesas PCIe controllers Some Renesas controllers get into a weird state if they are reset while programmed with 64bit addresses (they will preserve the top half of the address in internal, non visible registers). You end up with half the address coming from the kernel, and the other half coming from the firmware. Also, changing the programming leads to extra accesses even if the controller is supposed to be halted. The controller ends up with a fatal fault, and is then ripe for being properly reset. On the flip side, this is completely unsafe if the defvice isn't behind an IOMMU, so we have to make sure that this is the case. Can you say "broken"? This is an alternative method to the one introduced in 8466489ef5ba ("xhci: Reset Renesas uPD72020x USB controller for 32-bit DMA issue"), which will subsequently be removed. Tested-by: Domenico Andreoli Signed-off-by: Marc Zyngier Tested-by: Faiz Abbas Tested-by: Domenico Andreoli Acked-by: Mathias Nyman Signed-off-by: Greg Kroah-Hartman --- drivers/usb/host/xhci-pci.c | 8 ++++-- drivers/usb/host/xhci.c | 65 +++++++++++++++++++++++++++++++++++++++++++++ drivers/usb/host/xhci.h | 1 + 3 files changed, 72 insertions(+), 2 deletions(-) (limited to 'drivers/usb') diff --git a/drivers/usb/host/xhci-pci.c b/drivers/usb/host/xhci-pci.c index 85ffda8..e0a0a12 100644 --- a/drivers/usb/host/xhci-pci.c +++ b/drivers/usb/host/xhci-pci.c @@ -196,11 +196,15 @@ static void xhci_pci_quirks(struct device *dev, struct xhci_hcd *xhci) xhci->quirks |= XHCI_BROKEN_STREAMS; } if (pdev->vendor == PCI_VENDOR_ID_RENESAS && - pdev->device == 0x0014) + pdev->device == 0x0014) { xhci->quirks |= XHCI_TRUST_TX_LENGTH; + xhci->quirks |= XHCI_ZERO_64B_REGS; + } if (pdev->vendor == PCI_VENDOR_ID_RENESAS && - pdev->device == 0x0015) + pdev->device == 0x0015) { xhci->quirks |= XHCI_RESET_ON_RESUME; + xhci->quirks |= XHCI_ZERO_64B_REGS; + } if (pdev->vendor == PCI_VENDOR_ID_VIA) xhci->quirks |= XHCI_RESET_ON_RESUME; diff --git a/drivers/usb/host/xhci.c b/drivers/usb/host/xhci.c index 02b5ea7..8c8da2d 100644 --- a/drivers/usb/host/xhci.c +++ b/drivers/usb/host/xhci.c @@ -209,6 +209,68 @@ int xhci_reset(struct xhci_hcd *xhci) return ret; } +static void xhci_zero_64b_regs(struct xhci_hcd *xhci) +{ + struct device *dev = xhci_to_hcd(xhci)->self.sysdev; + int err, i; + u64 val; + + /* + * Some Renesas controllers get into a weird state if they are + * reset while programmed with 64bit addresses (they will preserve + * the top half of the address in internal, non visible + * registers). You end up with half the address coming from the + * kernel, and the other half coming from the firmware. Also, + * changing the programming leads to extra accesses even if the + * controller is supposed to be halted. The controller ends up with + * a fatal fault, and is then ripe for being properly reset. + * + * Special care is taken to only apply this if the device is behind + * an iommu. Doing anything when there is no iommu is definitely + * unsafe... + */ + if (!(xhci->quirks & XHCI_ZERO_64B_REGS) || !dev->iommu_group) + return; + + xhci_info(xhci, "Zeroing 64bit base registers, expecting fault\n"); + + /* Clear HSEIE so that faults do not get signaled */ + val = readl(&xhci->op_regs->command); + val &= ~CMD_HSEIE; + writel(val, &xhci->op_regs->command); + + /* Clear HSE (aka FATAL) */ + val = readl(&xhci->op_regs->status); + val |= STS_FATAL; + writel(val, &xhci->op_regs->status); + + /* Now zero the registers, and brace for impact */ + val = xhci_read_64(xhci, &xhci->op_regs->dcbaa_ptr); + if (upper_32_bits(val)) + xhci_write_64(xhci, 0, &xhci->op_regs->dcbaa_ptr); + val = xhci_read_64(xhci, &xhci->op_regs->cmd_ring); + if (upper_32_bits(val)) + xhci_write_64(xhci, 0, &xhci->op_regs->cmd_ring); + + for (i = 0; i < HCS_MAX_INTRS(xhci->hcs_params1); i++) { + struct xhci_intr_reg __iomem *ir; + + ir = &xhci->run_regs->ir_set[i]; + val = xhci_read_64(xhci, &ir->erst_base); + if (upper_32_bits(val)) + xhci_write_64(xhci, 0, &ir->erst_base); + val= xhci_read_64(xhci, &ir->erst_dequeue); + if (upper_32_bits(val)) + xhci_write_64(xhci, 0, &ir->erst_dequeue); + } + + /* Wait for the fault to appear. It will be cleared on reset */ + err = xhci_handshake(&xhci->op_regs->status, + STS_FATAL, STS_FATAL, + XHCI_MAX_HALT_USEC); + if (!err) + xhci_info(xhci, "Fault detected\n"); +} #ifdef CONFIG_USB_PCI /* @@ -1006,6 +1068,7 @@ int xhci_resume(struct xhci_hcd *xhci, bool hibernated) xhci_dbg(xhci, "Stop HCD\n"); xhci_halt(xhci); + xhci_zero_64b_regs(xhci); xhci_reset(xhci); spin_unlock_irq(&xhci->lock); xhci_cleanup_msix(xhci); @@ -4917,6 +4980,8 @@ int xhci_gen_setup(struct usb_hcd *hcd, xhci_get_quirks_t get_quirks) if (retval) return retval; + xhci_zero_64b_regs(xhci); + xhci_dbg(xhci, "Resetting HCD\n"); /* Reset the internal HC memory state and registers. */ retval = xhci_reset(xhci); diff --git a/drivers/usb/host/xhci.h b/drivers/usb/host/xhci.h index 2303ee4..939e2f86 100644 --- a/drivers/usb/host/xhci.h +++ b/drivers/usb/host/xhci.h @@ -1841,6 +1841,7 @@ struct xhci_hcd { #define XHCI_HW_LPM_DISABLE BIT_ULL(29) #define XHCI_SUSPEND_DELAY BIT_ULL(30) #define XHCI_INTEL_USB_ROLE_SW BIT_ULL(31) +#define XHCI_ZERO_64B_REGS BIT_ULL(32) unsigned int num_active_eps; unsigned int limit_active_eps; -- cgit v1.1 From c2ef60fea2dc7f903450926aee1f9c282ea529ca Mon Sep 17 00:00:00 2001 From: Marc Zyngier Date: Wed, 23 May 2018 18:41:38 +0100 Subject: Revert "xhci: Reset Renesas uPD72020x USB controller for 32-bit DMA issue" This reverts commit 8466489ef5ba48272ba4fa4ea9f8f403306de4c7. Now that we can properly reset the uPD72020x without a hard PCI reset, let's get rid of the existing quirks. Tested-by: Domenico Andreoli Signed-off-by: Marc Zyngier Tested-by: Faiz Abbas Tested-by: Domenico Andreoli Acked-by: Mathias Nyman Signed-off-by: Greg Kroah-Hartman --- drivers/usb/host/pci-quirks.c | 20 -------------------- drivers/usb/host/pci-quirks.h | 1 - drivers/usb/host/xhci-pci.c | 7 ------- 3 files changed, 28 deletions(-) (limited to 'drivers/usb') diff --git a/drivers/usb/host/pci-quirks.c b/drivers/usb/host/pci-quirks.c index 67ad4bb..3625a5c 100644 --- a/drivers/usb/host/pci-quirks.c +++ b/drivers/usb/host/pci-quirks.c @@ -1268,23 +1268,3 @@ static void quirk_usb_early_handoff(struct pci_dev *pdev) } DECLARE_PCI_FIXUP_CLASS_FINAL(PCI_ANY_ID, PCI_ANY_ID, PCI_CLASS_SERIAL_USB, 8, quirk_usb_early_handoff); - -bool usb_xhci_needs_pci_reset(struct pci_dev *pdev) -{ - /* - * Our dear uPD72020{1,2} friend only partially resets when - * asked to via the XHCI interface, and may end up doing DMA - * at the wrong addresses, as it keeps the top 32bit of some - * addresses from its previous programming under obscure - * circumstances. - * Give it a good wack at probe time. Unfortunately, this - * needs to happen before we've had a chance to discover any - * quirk, or the system will be in a rather bad state. - */ - if (pdev->vendor == PCI_VENDOR_ID_RENESAS && - (pdev->device == 0x0014 || pdev->device == 0x0015)) - return true; - - return false; -} -EXPORT_SYMBOL_GPL(usb_xhci_needs_pci_reset); diff --git a/drivers/usb/host/pci-quirks.h b/drivers/usb/host/pci-quirks.h index 4ca0d9b..63c63307 100644 --- a/drivers/usb/host/pci-quirks.h +++ b/drivers/usb/host/pci-quirks.h @@ -16,7 +16,6 @@ void usb_asmedia_modifyflowcontrol(struct pci_dev *pdev); void usb_enable_intel_xhci_ports(struct pci_dev *xhci_pdev); void usb_disable_xhci_ports(struct pci_dev *xhci_pdev); void sb800_prefetch(struct device *dev, int on); -bool usb_xhci_needs_pci_reset(struct pci_dev *pdev); bool usb_amd_pt_check_port(struct device *device, int port); #else struct pci_dev; diff --git a/drivers/usb/host/xhci-pci.c b/drivers/usb/host/xhci-pci.c index e0a0a12..6372edf 100644 --- a/drivers/usb/host/xhci-pci.c +++ b/drivers/usb/host/xhci-pci.c @@ -288,13 +288,6 @@ static int xhci_pci_probe(struct pci_dev *dev, const struct pci_device_id *id) driver = (struct hc_driver *)id->driver_data; - /* For some HW implementation, a XHCI reset is just not enough... */ - if (usb_xhci_needs_pci_reset(dev)) { - dev_info(&dev->dev, "Resetting\n"); - if (pci_reset_function_locked(dev)) - dev_warn(&dev->dev, "Reset failed"); - } - /* Prevent runtime suspending between USB-2 and USB-3 initialization */ pm_runtime_get_noresume(&dev->dev); -- cgit v1.1