From 7a8576204333d133d58cbcc59dacf49a5546e3e4 Mon Sep 17 00:00:00 2001 From: Philipp Zabel Date: Sun, 22 Jun 2008 23:36:39 +0100 Subject: [ARM] 5120/1: pxa: correct platform driver names for PXA25x and PXA27x UDC drivers The pxa2xx_udc.c driver is renamed to pxa25x_udc.c (the platform driver name changes from pxa2xx-udc to pxa25x-udc) and the platform driver name of pxa27x_udc.c is fixed to pxa27x-udc. pxa_device_udc in devices.c is split into pxa25x and pxa27x flavors and the pxa27x_device_udc is enabled in pxa27x.c. Signed-off-by: Philipp Zabel Acked-by: Nicolas Pitre Acked-by: Eric Miao Signed-off-by: Russell King Including from Ian Molton: Fixes for mistakes left over from the PXA2{5,7}X UDC split. Signed-off-by: Ian Molton Signed-off-by: Russell King --- arch/arm/mach-ixp4xx/common.c | 4 +- arch/arm/mach-pxa/devices.c | 15 +- arch/arm/mach-pxa/devices.h | 3 +- arch/arm/mach-pxa/pxa25x.c | 4 +- arch/arm/mach-pxa/pxa27x.c | 4 +- arch/arm/mach-pxa/pxa3xx.c | 2 +- drivers/usb/gadget/Kconfig | 12 +- drivers/usb/gadget/Makefile | 2 +- drivers/usb/gadget/ether.c | 2 +- drivers/usb/gadget/gadget_chips.h | 4 +- drivers/usb/gadget/inode.c | 2 +- drivers/usb/gadget/pxa25x_udc.c | 2388 ++++++++++++++++++++++++++++++++++++ drivers/usb/gadget/pxa25x_udc.h | 266 +++++ drivers/usb/gadget/pxa27x_udc.c | 4 +- drivers/usb/gadget/pxa2xx_udc.c | 2389 ------------------------------------- drivers/usb/gadget/pxa2xx_udc.h | 267 ----- 16 files changed, 2689 insertions(+), 2679 deletions(-) create mode 100644 drivers/usb/gadget/pxa25x_udc.c create mode 100644 drivers/usb/gadget/pxa25x_udc.h delete mode 100644 drivers/usb/gadget/pxa2xx_udc.c delete mode 100644 drivers/usb/gadget/pxa2xx_udc.h diff --git a/arch/arm/mach-ixp4xx/common.c b/arch/arm/mach-ixp4xx/common.c index f6d66dc..3781b3d 100644 --- a/arch/arm/mach-ixp4xx/common.c +++ b/arch/arm/mach-ixp4xx/common.c @@ -326,11 +326,11 @@ static struct resource ixp4xx_udc_resources[] = { }; /* - * USB device controller. The IXP4xx uses the same controller as PXA2XX, + * USB device controller. The IXP4xx uses the same controller as PXA25X, * so we just use the same device. */ static struct platform_device ixp4xx_udc_device = { - .name = "pxa2xx-udc", + .name = "pxa25x-udc", .id = -1, .num_resources = 2, .resource = ixp4xx_udc_resources, diff --git a/arch/arm/mach-pxa/devices.c b/arch/arm/mach-pxa/devices.c index 4a1eebb..123ee19 100644 --- a/arch/arm/mach-pxa/devices.c +++ b/arch/arm/mach-pxa/devices.c @@ -93,8 +93,19 @@ static struct resource pxa2xx_udc_resources[] = { static u64 udc_dma_mask = ~(u32)0; -struct platform_device pxa_device_udc = { - .name = "pxa2xx-udc", +struct platform_device pxa25x_device_udc = { + .name = "pxa25x-udc", + .id = -1, + .resource = pxa2xx_udc_resources, + .num_resources = ARRAY_SIZE(pxa2xx_udc_resources), + .dev = { + .platform_data = &pxa_udc_info, + .dma_mask = &udc_dma_mask, + } +}; + +struct platform_device pxa27x_device_udc = { + .name = "pxa27x-udc", .id = -1, .resource = pxa2xx_udc_resources, .num_resources = ARRAY_SIZE(pxa2xx_udc_resources), diff --git a/arch/arm/mach-pxa/devices.h b/arch/arm/mach-pxa/devices.h index e620a33..881d1a7 100644 --- a/arch/arm/mach-pxa/devices.h +++ b/arch/arm/mach-pxa/devices.h @@ -1,7 +1,8 @@ extern struct platform_device pxa_device_mci; extern struct platform_device pxa3xx_device_mci2; extern struct platform_device pxa3xx_device_mci3; -extern struct platform_device pxa_device_udc; +extern struct platform_device pxa25x_device_udc; +extern struct platform_device pxa27x_device_udc; extern struct platform_device pxa_device_fb; extern struct platform_device pxa_device_ffuart; extern struct platform_device pxa_device_btuart; diff --git a/arch/arm/mach-pxa/pxa25x.c b/arch/arm/mach-pxa/pxa25x.c index a1a7dd2..4cd50e3 100644 --- a/arch/arm/mach-pxa/pxa25x.c +++ b/arch/arm/mach-pxa/pxa25x.c @@ -127,7 +127,7 @@ static struct clk pxa25x_clks[] = { INIT_CKEN("UARTCLK", FFUART, 14745600, 1, &pxa_device_ffuart.dev), INIT_CKEN("UARTCLK", BTUART, 14745600, 1, &pxa_device_btuart.dev), INIT_CKEN("UARTCLK", STUART, 14745600, 1, NULL), - INIT_CKEN("UDCCLK", USB, 47923000, 5, &pxa_device_udc.dev), + INIT_CKEN("UDCCLK", USB, 47923000, 5, &pxa25x_device_udc.dev), INIT_CKEN("MMCCLK", MMC, 19169000, 0, &pxa_device_mci.dev), INIT_CKEN("I2CCLK", I2C, 31949000, 0, &pxa_device_i2c.dev), @@ -267,7 +267,7 @@ void __init pxa25x_init_irq(void) } static struct platform_device *pxa25x_devices[] __initdata = { - &pxa_device_udc, + &pxa25x_device_udc, &pxa_device_ffuart, &pxa_device_btuart, &pxa_device_stuart, diff --git a/arch/arm/mach-pxa/pxa27x.c b/arch/arm/mach-pxa/pxa27x.c index 4d7afae..d5d14ea 100644 --- a/arch/arm/mach-pxa/pxa27x.c +++ b/arch/arm/mach-pxa/pxa27x.c @@ -146,7 +146,7 @@ static struct clk pxa27x_clks[] = { INIT_CKEN("I2SCLK", I2S, 14682000, 0, &pxa_device_i2s.dev), INIT_CKEN("I2CCLK", I2C, 32842000, 0, &pxa_device_i2c.dev), - INIT_CKEN("UDCCLK", USB, 48000000, 5, &pxa_device_udc.dev), + INIT_CKEN("UDCCLK", USB, 48000000, 5, &pxa27x_device_udc.dev), INIT_CKEN("MMCCLK", MMC, 19500000, 0, &pxa_device_mci.dev), INIT_CKEN("FICPCLK", FICP, 48000000, 0, &pxa_device_ficp.dev), @@ -357,7 +357,7 @@ void __init pxa_set_i2c_power_info(struct i2c_pxa_platform_data *info) } static struct platform_device *devices[] __initdata = { -/* &pxa_device_udc, The UDC driver is PXA25x only */ + &pxa27x_device_udc, &pxa_device_ffuart, &pxa_device_btuart, &pxa_device_stuart, diff --git a/arch/arm/mach-pxa/pxa3xx.c b/arch/arm/mach-pxa/pxa3xx.c index d26a9b0..15685d2 100644 --- a/arch/arm/mach-pxa/pxa3xx.c +++ b/arch/arm/mach-pxa/pxa3xx.c @@ -231,7 +231,7 @@ static struct clk pxa3xx_clks[] = { PXA3xx_CKEN("UARTCLK", STUART, 14857000, 1, NULL), PXA3xx_CKEN("I2CCLK", I2C, 32842000, 0, &pxa_device_i2c.dev), - PXA3xx_CKEN("UDCCLK", UDC, 48000000, 5, &pxa_device_udc.dev), + PXA3xx_CKEN("UDCCLK", UDC, 48000000, 5, &pxa27x_device_udc.dev), PXA3xx_CKEN("USBCLK", USBH, 48000000, 0, &pxa27x_device_ohci.dev), PXA3xx_CKEN("KBDCLK", KEYPAD, 32768, 0, &pxa27x_device_keypad.dev), diff --git a/drivers/usb/gadget/Kconfig b/drivers/usb/gadget/Kconfig index 6e784d2..13dcec3 100644 --- a/drivers/usb/gadget/Kconfig +++ b/drivers/usb/gadget/Kconfig @@ -172,7 +172,7 @@ config USB_NET2280 default USB_GADGET select USB_GADGET_SELECTED -config USB_GADGET_PXA2XX +config USB_GADGET_PXA25X boolean "PXA 25x or IXP 4xx" depends on (ARCH_PXA && PXA25x) || ARCH_IXP4XX help @@ -184,19 +184,19 @@ config USB_GADGET_PXA2XX zero (for control transfers). Say "y" to link the driver statically, or "m" to build a - dynamically linked module called "pxa2xx_udc" and force all + dynamically linked module called "pxa25x_udc" and force all gadget drivers to also be dynamically linked. -config USB_PXA2XX +config USB_PXA25X tristate - depends on USB_GADGET_PXA2XX + depends on USB_GADGET_PXA25X default USB_GADGET select USB_GADGET_SELECTED # if there's only one gadget driver, using only two bulk endpoints, # don't waste memory for the other endpoints -config USB_PXA2XX_SMALL - depends on USB_GADGET_PXA2XX +config USB_PXA25X_SMALL + depends on USB_GADGET_PXA25X bool default n if USB_ETH_RNDIS default y if USB_ZERO diff --git a/drivers/usb/gadget/Makefile b/drivers/usb/gadget/Makefile index 1235725..e258afd 100644 --- a/drivers/usb/gadget/Makefile +++ b/drivers/usb/gadget/Makefile @@ -8,7 +8,7 @@ endif obj-$(CONFIG_USB_DUMMY_HCD) += dummy_hcd.o obj-$(CONFIG_USB_NET2280) += net2280.o obj-$(CONFIG_USB_AMD5536UDC) += amd5536udc.o -obj-$(CONFIG_USB_PXA2XX) += pxa2xx_udc.o +obj-$(CONFIG_USB_PXA25X) += pxa25x_udc.o obj-$(CONFIG_USB_PXA27X) += pxa27x_udc.o obj-$(CONFIG_USB_GOKU) += goku_udc.o obj-$(CONFIG_USB_OMAP) += omap_udc.o diff --git a/drivers/usb/gadget/ether.c b/drivers/usb/gadget/ether.c index 8d61ea6..4ce3950 100644 --- a/drivers/usb/gadget/ether.c +++ b/drivers/usb/gadget/ether.c @@ -262,7 +262,7 @@ MODULE_PARM_DESC(host_addr, "Host Ethernet Address"); /* For CDC-incapable hardware, choose the simple cdc subset. * Anything that talks bulk (without notable bugs) can do this. */ -#ifdef CONFIG_USB_GADGET_PXA2XX +#ifdef CONFIG_USB_GADGET_PXA25X #define DEV_CONFIG_SUBSET #endif diff --git a/drivers/usb/gadget/gadget_chips.h b/drivers/usb/gadget/gadget_chips.h index f7f159c..ca5149e 100644 --- a/drivers/usb/gadget/gadget_chips.h +++ b/drivers/usb/gadget/gadget_chips.h @@ -29,8 +29,8 @@ #define gadget_is_dummy(g) 0 #endif -#ifdef CONFIG_USB_GADGET_PXA2XX -#define gadget_is_pxa(g) !strcmp("pxa2xx_udc", (g)->name) +#ifdef CONFIG_USB_GADGET_PXA25X +#define gadget_is_pxa(g) !strcmp("pxa25x_udc", (g)->name) #else #define gadget_is_pxa(g) 0 #endif diff --git a/drivers/usb/gadget/inode.c b/drivers/usb/gadget/inode.c index 69b0a27..f132a92 100644 --- a/drivers/usb/gadget/inode.c +++ b/drivers/usb/gadget/inode.c @@ -1501,7 +1501,7 @@ gadgetfs_setup (struct usb_gadget *gadget, const struct usb_ctrlrequest *ctrl) } break; -#ifndef CONFIG_USB_GADGET_PXA2XX +#ifndef CONFIG_USB_GADGET_PXA25X /* PXA automagically handles this request too */ case USB_REQ_GET_CONFIGURATION: if (ctrl->bRequestType != 0x80) diff --git a/drivers/usb/gadget/pxa25x_udc.c b/drivers/usb/gadget/pxa25x_udc.c new file mode 100644 index 0000000..031dceb --- /dev/null +++ b/drivers/usb/gadget/pxa25x_udc.c @@ -0,0 +1,2388 @@ +/* + * Intel PXA25x and IXP4xx on-chip full speed USB device controllers + * + * Copyright (C) 2002 Intrinsyc, Inc. (Frank Becker) + * Copyright (C) 2003 Robert Schwebel, Pengutronix + * Copyright (C) 2003 Benedikt Spranger, Pengutronix + * Copyright (C) 2003 David Brownell + * Copyright (C) 2003 Joshua Wise + * + * 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. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + * + */ + +/* #define VERBOSE_DEBUG */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include +#include +#include +#include +#include +#include + +#include +#include + +/* + * This driver is PXA25x only. Grab the right register definitions. + */ +#ifdef CONFIG_ARCH_PXA +#include +#endif + +#include + + +/* + * This driver handles the USB Device Controller (UDC) in Intel's PXA 25x + * series processors. The UDC for the IXP 4xx series is very similar. + * There are fifteen endpoints, in addition to ep0. + * + * Such controller drivers work with a gadget driver. The gadget driver + * returns descriptors, implements configuration and data protocols used + * by the host to interact with this device, and allocates endpoints to + * the different protocol interfaces. The controller driver virtualizes + * usb hardware so that the gadget drivers will be more portable. + * + * This UDC hardware wants to implement a bit too much USB protocol, so + * it constrains the sorts of USB configuration change events that work. + * The errata for these chips are misleading; some "fixed" bugs from + * pxa250 a0/a1 b0/b1/b2 sure act like they're still there. + * + * Note that the UDC hardware supports DMA (except on IXP) but that's + * not used here. IN-DMA (to host) is simple enough, when the data is + * suitably aligned (16 bytes) ... the network stack doesn't do that, + * other software can. OUT-DMA is buggy in most chip versions, as well + * as poorly designed (data toggle not automatic). So this driver won't + * bother using DMA. (Mostly-working IN-DMA support was available in + * kernels before 2.6.23, but was never enabled or well tested.) + */ + +#define DRIVER_VERSION "30-June-2007" +#define DRIVER_DESC "PXA 25x USB Device Controller driver" + + +static const char driver_name [] = "pxa25x_udc"; + +static const char ep0name [] = "ep0"; + + +#ifdef CONFIG_ARCH_IXP4XX + +/* cpu-specific register addresses are compiled in to this code */ +#ifdef CONFIG_ARCH_PXA +#error "Can't configure both IXP and PXA" +#endif + +/* IXP doesn't yet support */ +#define clk_get(dev,name) NULL +#define clk_enable(clk) do { } while (0) +#define clk_disable(clk) do { } while (0) +#define clk_put(clk) do { } while (0) + +#endif + +#include "pxa25x_udc.h" + + +#ifdef CONFIG_USB_PXA25X_SMALL +#define SIZE_STR " (small)" +#else +#define SIZE_STR "" +#endif + +/* --------------------------------------------------------------------------- + * endpoint related parts of the api to the usb controller hardware, + * used by gadget driver; and the inner talker-to-hardware core. + * --------------------------------------------------------------------------- + */ + +static void pxa25x_ep_fifo_flush (struct usb_ep *ep); +static void nuke (struct pxa25x_ep *, int status); + +/* one GPIO should be used to detect VBUS from the host */ +static int is_vbus_present(void) +{ + struct pxa2xx_udc_mach_info *mach = the_controller->mach; + + if (mach->gpio_vbus) { + int value = gpio_get_value(mach->gpio_vbus); + return mach->gpio_vbus_inverted ? !value : value; + } + if (mach->udc_is_connected) + return mach->udc_is_connected(); + return 1; +} + +/* one GPIO should control a D+ pullup, so host sees this device (or not) */ +static void pullup_off(void) +{ + struct pxa2xx_udc_mach_info *mach = the_controller->mach; + + if (mach->gpio_pullup) + gpio_set_value(mach->gpio_pullup, 0); + else if (mach->udc_command) + mach->udc_command(PXA2XX_UDC_CMD_DISCONNECT); +} + +static void pullup_on(void) +{ + struct pxa2xx_udc_mach_info *mach = the_controller->mach; + + if (mach->gpio_pullup) + gpio_set_value(mach->gpio_pullup, 1); + else if (mach->udc_command) + mach->udc_command(PXA2XX_UDC_CMD_CONNECT); +} + +static void pio_irq_enable(int bEndpointAddress) +{ + bEndpointAddress &= 0xf; + if (bEndpointAddress < 8) + UICR0 &= ~(1 << bEndpointAddress); + else { + bEndpointAddress -= 8; + UICR1 &= ~(1 << bEndpointAddress); + } +} + +static void pio_irq_disable(int bEndpointAddress) +{ + bEndpointAddress &= 0xf; + if (bEndpointAddress < 8) + UICR0 |= 1 << bEndpointAddress; + else { + bEndpointAddress -= 8; + UICR1 |= 1 << bEndpointAddress; + } +} + +/* The UDCCR reg contains mask and interrupt status bits, + * so using '|=' isn't safe as it may ack an interrupt. + */ +#define UDCCR_MASK_BITS (UDCCR_REM | UDCCR_SRM | UDCCR_UDE) + +static inline void udc_set_mask_UDCCR(int mask) +{ + UDCCR = (UDCCR & UDCCR_MASK_BITS) | (mask & UDCCR_MASK_BITS); +} + +static inline void udc_clear_mask_UDCCR(int mask) +{ + UDCCR = (UDCCR & UDCCR_MASK_BITS) & ~(mask & UDCCR_MASK_BITS); +} + +static inline void udc_ack_int_UDCCR(int mask) +{ + /* udccr contains the bits we dont want to change */ + __u32 udccr = UDCCR & UDCCR_MASK_BITS; + + UDCCR = udccr | (mask & ~UDCCR_MASK_BITS); +} + +/* + * endpoint enable/disable + * + * we need to verify the descriptors used to enable endpoints. since pxa25x + * endpoint configurations are fixed, and are pretty much always enabled, + * there's not a lot to manage here. + * + * because pxa25x can't selectively initialize bulk (or interrupt) endpoints, + * (resetting endpoint halt and toggle), SET_INTERFACE is unusable except + * for a single interface (with only the default altsetting) and for gadget + * drivers that don't halt endpoints (not reset by set_interface). that also + * means that if you use ISO, you must violate the USB spec rule that all + * iso endpoints must be in non-default altsettings. + */ +static int pxa25x_ep_enable (struct usb_ep *_ep, + const struct usb_endpoint_descriptor *desc) +{ + struct pxa25x_ep *ep; + struct pxa25x_udc *dev; + + ep = container_of (_ep, struct pxa25x_ep, ep); + if (!_ep || !desc || ep->desc || _ep->name == ep0name + || desc->bDescriptorType != USB_DT_ENDPOINT + || ep->bEndpointAddress != desc->bEndpointAddress + || ep->fifo_size < le16_to_cpu + (desc->wMaxPacketSize)) { + DMSG("%s, bad ep or descriptor\n", __func__); + return -EINVAL; + } + + /* xfer types must match, except that interrupt ~= bulk */ + if (ep->bmAttributes != desc->bmAttributes + && ep->bmAttributes != USB_ENDPOINT_XFER_BULK + && desc->bmAttributes != USB_ENDPOINT_XFER_INT) { + DMSG("%s, %s type mismatch\n", __func__, _ep->name); + return -EINVAL; + } + + /* hardware _could_ do smaller, but driver doesn't */ + if ((desc->bmAttributes == USB_ENDPOINT_XFER_BULK + && le16_to_cpu (desc->wMaxPacketSize) + != BULK_FIFO_SIZE) + || !desc->wMaxPacketSize) { + DMSG("%s, bad %s maxpacket\n", __func__, _ep->name); + return -ERANGE; + } + + dev = ep->dev; + if (!dev->driver || dev->gadget.speed == USB_SPEED_UNKNOWN) { + DMSG("%s, bogus device state\n", __func__); + return -ESHUTDOWN; + } + + ep->desc = desc; + ep->stopped = 0; + ep->pio_irqs = 0; + ep->ep.maxpacket = le16_to_cpu (desc->wMaxPacketSize); + + /* flush fifo (mostly for OUT buffers) */ + pxa25x_ep_fifo_flush (_ep); + + /* ... reset halt state too, if we could ... */ + + DBG(DBG_VERBOSE, "enabled %s\n", _ep->name); + return 0; +} + +static int pxa25x_ep_disable (struct usb_ep *_ep) +{ + struct pxa25x_ep *ep; + unsigned long flags; + + ep = container_of (_ep, struct pxa25x_ep, ep); + if (!_ep || !ep->desc) { + DMSG("%s, %s not enabled\n", __func__, + _ep ? ep->ep.name : NULL); + return -EINVAL; + } + local_irq_save(flags); + + nuke (ep, -ESHUTDOWN); + + /* flush fifo (mostly for IN buffers) */ + pxa25x_ep_fifo_flush (_ep); + + ep->desc = NULL; + ep->stopped = 1; + + local_irq_restore(flags); + DBG(DBG_VERBOSE, "%s disabled\n", _ep->name); + return 0; +} + +/*-------------------------------------------------------------------------*/ + +/* for the pxa25x, these can just wrap kmalloc/kfree. gadget drivers + * must still pass correctly initialized endpoints, since other controller + * drivers may care about how it's currently set up (dma issues etc). + */ + +/* + * pxa25x_ep_alloc_request - allocate a request data structure + */ +static struct usb_request * +pxa25x_ep_alloc_request (struct usb_ep *_ep, gfp_t gfp_flags) +{ + struct pxa25x_request *req; + + req = kzalloc(sizeof(*req), gfp_flags); + if (!req) + return NULL; + + INIT_LIST_HEAD (&req->queue); + return &req->req; +} + + +/* + * pxa25x_ep_free_request - deallocate a request data structure + */ +static void +pxa25x_ep_free_request (struct usb_ep *_ep, struct usb_request *_req) +{ + struct pxa25x_request *req; + + req = container_of (_req, struct pxa25x_request, req); + WARN_ON (!list_empty (&req->queue)); + kfree(req); +} + +/*-------------------------------------------------------------------------*/ + +/* + * done - retire a request; caller blocked irqs + */ +static void done(struct pxa25x_ep *ep, struct pxa25x_request *req, int status) +{ + unsigned stopped = ep->stopped; + + list_del_init(&req->queue); + + if (likely (req->req.status == -EINPROGRESS)) + req->req.status = status; + else + status = req->req.status; + + if (status && status != -ESHUTDOWN) + DBG(DBG_VERBOSE, "complete %s req %p stat %d len %u/%u\n", + ep->ep.name, &req->req, status, + req->req.actual, req->req.length); + + /* don't modify queue heads during completion callback */ + ep->stopped = 1; + req->req.complete(&ep->ep, &req->req); + ep->stopped = stopped; +} + + +static inline void ep0_idle (struct pxa25x_udc *dev) +{ + dev->ep0state = EP0_IDLE; +} + +static int +write_packet(volatile u32 *uddr, struct pxa25x_request *req, unsigned max) +{ + u8 *buf; + unsigned length, count; + + buf = req->req.buf + req->req.actual; + prefetch(buf); + + /* how big will this packet be? */ + length = min(req->req.length - req->req.actual, max); + req->req.actual += length; + + count = length; + while (likely(count--)) + *uddr = *buf++; + + return length; +} + +/* + * write to an IN endpoint fifo, as many packets as possible. + * irqs will use this to write the rest later. + * caller guarantees at least one packet buffer is ready (or a zlp). + */ +static int +write_fifo (struct pxa25x_ep *ep, struct pxa25x_request *req) +{ + unsigned max; + + max = le16_to_cpu(ep->desc->wMaxPacketSize); + do { + unsigned count; + int is_last, is_short; + + count = write_packet(ep->reg_uddr, req, max); + + /* last packet is usually short (or a zlp) */ + if (unlikely (count != max)) + is_last = is_short = 1; + else { + if (likely(req->req.length != req->req.actual) + || req->req.zero) + is_last = 0; + else + is_last = 1; + /* interrupt/iso maxpacket may not fill the fifo */ + is_short = unlikely (max < ep->fifo_size); + } + + DBG(DBG_VERY_NOISY, "wrote %s %d bytes%s%s %d left %p\n", + ep->ep.name, count, + is_last ? "/L" : "", is_short ? "/S" : "", + req->req.length - req->req.actual, req); + + /* let loose that packet. maybe try writing another one, + * double buffering might work. TSP, TPC, and TFS + * bit values are the same for all normal IN endpoints. + */ + *ep->reg_udccs = UDCCS_BI_TPC; + if (is_short) + *ep->reg_udccs = UDCCS_BI_TSP; + + /* requests complete when all IN data is in the FIFO */ + if (is_last) { + done (ep, req, 0); + if (list_empty(&ep->queue)) + pio_irq_disable (ep->bEndpointAddress); + return 1; + } + + // TODO experiment: how robust can fifo mode tweaking be? + // double buffering is off in the default fifo mode, which + // prevents TFS from being set here. + + } while (*ep->reg_udccs & UDCCS_BI_TFS); + return 0; +} + +/* caller asserts req->pending (ep0 irq status nyet cleared); starts + * ep0 data stage. these chips want very simple state transitions. + */ +static inline +void ep0start(struct pxa25x_udc *dev, u32 flags, const char *tag) +{ + UDCCS0 = flags|UDCCS0_SA|UDCCS0_OPR; + USIR0 = USIR0_IR0; + dev->req_pending = 0; + DBG(DBG_VERY_NOISY, "%s %s, %02x/%02x\n", + __func__, tag, UDCCS0, flags); +} + +static int +write_ep0_fifo (struct pxa25x_ep *ep, struct pxa25x_request *req) +{ + unsigned count; + int is_short; + + count = write_packet(&UDDR0, req, EP0_FIFO_SIZE); + ep->dev->stats.write.bytes += count; + + /* last packet "must be" short (or a zlp) */ + is_short = (count != EP0_FIFO_SIZE); + + DBG(DBG_VERY_NOISY, "ep0in %d bytes %d left %p\n", count, + req->req.length - req->req.actual, req); + + if (unlikely (is_short)) { + if (ep->dev->req_pending) + ep0start(ep->dev, UDCCS0_IPR, "short IN"); + else + UDCCS0 = UDCCS0_IPR; + + count = req->req.length; + done (ep, req, 0); + ep0_idle(ep->dev); +#ifndef CONFIG_ARCH_IXP4XX +#if 1 + /* This seems to get rid of lost status irqs in some cases: + * host responds quickly, or next request involves config + * change automagic, or should have been hidden, or ... + * + * FIXME get rid of all udelays possible... + */ + if (count >= EP0_FIFO_SIZE) { + count = 100; + do { + if ((UDCCS0 & UDCCS0_OPR) != 0) { + /* clear OPR, generate ack */ + UDCCS0 = UDCCS0_OPR; + break; + } + count--; + udelay(1); + } while (count); + } +#endif +#endif + } else if (ep->dev->req_pending) + ep0start(ep->dev, 0, "IN"); + return is_short; +} + + +/* + * read_fifo - unload packet(s) from the fifo we use for usb OUT + * transfers and put them into the request. caller should have made + * sure there's at least one packet ready. + * + * returns true if the request completed because of short packet or the + * request buffer having filled (and maybe overran till end-of-packet). + */ +static int +read_fifo (struct pxa25x_ep *ep, struct pxa25x_request *req) +{ + for (;;) { + u32 udccs; + u8 *buf; + unsigned bufferspace, count, is_short; + + /* make sure there's a packet in the FIFO. + * UDCCS_{BO,IO}_RPC are all the same bit value. + * UDCCS_{BO,IO}_RNE are all the same bit value. + */ + udccs = *ep->reg_udccs; + if (unlikely ((udccs & UDCCS_BO_RPC) == 0)) + break; + buf = req->req.buf + req->req.actual; + prefetchw(buf); + bufferspace = req->req.length - req->req.actual; + + /* read all bytes from this packet */ + if (likely (udccs & UDCCS_BO_RNE)) { + count = 1 + (0x0ff & *ep->reg_ubcr); + req->req.actual += min (count, bufferspace); + } else /* zlp */ + count = 0; + is_short = (count < ep->ep.maxpacket); + DBG(DBG_VERY_NOISY, "read %s %02x, %d bytes%s req %p %d/%d\n", + ep->ep.name, udccs, count, + is_short ? "/S" : "", + req, req->req.actual, req->req.length); + while (likely (count-- != 0)) { + u8 byte = (u8) *ep->reg_uddr; + + if (unlikely (bufferspace == 0)) { + /* this happens when the driver's buffer + * is smaller than what the host sent. + * discard the extra data. + */ + if (req->req.status != -EOVERFLOW) + DMSG("%s overflow %d\n", + ep->ep.name, count); + req->req.status = -EOVERFLOW; + } else { + *buf++ = byte; + bufferspace--; + } + } + *ep->reg_udccs = UDCCS_BO_RPC; + /* RPC/RSP/RNE could now reflect the other packet buffer */ + + /* iso is one request per packet */ + if (ep->bmAttributes == USB_ENDPOINT_XFER_ISOC) { + if (udccs & UDCCS_IO_ROF) + req->req.status = -EHOSTUNREACH; + /* more like "is_done" */ + is_short = 1; + } + + /* completion */ + if (is_short || req->req.actual == req->req.length) { + done (ep, req, 0); + if (list_empty(&ep->queue)) + pio_irq_disable (ep->bEndpointAddress); + return 1; + } + + /* finished that packet. the next one may be waiting... */ + } + return 0; +} + +/* + * special ep0 version of the above. no UBCR0 or double buffering; status + * handshaking is magic. most device protocols don't need control-OUT. + * CDC vendor commands (and RNDIS), mass storage CB/CBI, and some other + * protocols do use them. + */ +static int +read_ep0_fifo (struct pxa25x_ep *ep, struct pxa25x_request *req) +{ + u8 *buf, byte; + unsigned bufferspace; + + buf = req->req.buf + req->req.actual; + bufferspace = req->req.length - req->req.actual; + + while (UDCCS0 & UDCCS0_RNE) { + byte = (u8) UDDR0; + + if (unlikely (bufferspace == 0)) { + /* this happens when the driver's buffer + * is smaller than what the host sent. + * discard the extra data. + */ + if (req->req.status != -EOVERFLOW) + DMSG("%s overflow\n", ep->ep.name); + req->req.status = -EOVERFLOW; + } else { + *buf++ = byte; + req->req.actual++; + bufferspace--; + } + } + + UDCCS0 = UDCCS0_OPR | UDCCS0_IPR; + + /* completion */ + if (req->req.actual >= req->req.length) + return 1; + + /* finished that packet. the next one may be waiting... */ + return 0; +} + +/*-------------------------------------------------------------------------*/ + +static int +pxa25x_ep_queue(struct usb_ep *_ep, struct usb_request *_req, gfp_t gfp_flags) +{ + struct pxa25x_request *req; + struct pxa25x_ep *ep; + struct pxa25x_udc *dev; + unsigned long flags; + + req = container_of(_req, struct pxa25x_request, req); + if (unlikely (!_req || !_req->complete || !_req->buf + || !list_empty(&req->queue))) { + DMSG("%s, bad params\n", __func__); + return -EINVAL; + } + + ep = container_of(_ep, struct pxa25x_ep, ep); + if (unlikely (!_ep || (!ep->desc && ep->ep.name != ep0name))) { + DMSG("%s, bad ep\n", __func__); + return -EINVAL; + } + + dev = ep->dev; + if (unlikely (!dev->driver + || dev->gadget.speed == USB_SPEED_UNKNOWN)) { + DMSG("%s, bogus device state\n", __func__); + return -ESHUTDOWN; + } + + /* iso is always one packet per request, that's the only way + * we can report per-packet status. that also helps with dma. + */ + if (unlikely (ep->bmAttributes == USB_ENDPOINT_XFER_ISOC + && req->req.length > le16_to_cpu + (ep->desc->wMaxPacketSize))) + return -EMSGSIZE; + + DBG(DBG_NOISY, "%s queue req %p, len %d buf %p\n", + _ep->name, _req, _req->length, _req->buf); + + local_irq_save(flags); + + _req->status = -EINPROGRESS; + _req->actual = 0; + + /* kickstart this i/o queue? */ + if (list_empty(&ep->queue) && !ep->stopped) { + if (ep->desc == NULL/* ep0 */) { + unsigned length = _req->length; + + switch (dev->ep0state) { + case EP0_IN_DATA_PHASE: + dev->stats.write.ops++; + if (write_ep0_fifo(ep, req)) + req = NULL; + break; + + case EP0_OUT_DATA_PHASE: + dev->stats.read.ops++; + /* messy ... */ + if (dev->req_config) { + DBG(DBG_VERBOSE, "ep0 config ack%s\n", + dev->has_cfr ? "" : " raced"); + if (dev->has_cfr) + UDCCFR = UDCCFR_AREN|UDCCFR_ACM + |UDCCFR_MB1; + done(ep, req, 0); + dev->ep0state = EP0_END_XFER; + local_irq_restore (flags); + return 0; + } + if (dev->req_pending) + ep0start(dev, UDCCS0_IPR, "OUT"); + if (length == 0 || ((UDCCS0 & UDCCS0_RNE) != 0 + && read_ep0_fifo(ep, req))) { + ep0_idle(dev); + done(ep, req, 0); + req = NULL; + } + break; + + default: + DMSG("ep0 i/o, odd state %d\n", dev->ep0state); + local_irq_restore (flags); + return -EL2HLT; + } + /* can the FIFO can satisfy the request immediately? */ + } else if ((ep->bEndpointAddress & USB_DIR_IN) != 0) { + if ((*ep->reg_udccs & UDCCS_BI_TFS) != 0 + && write_fifo(ep, req)) + req = NULL; + } else if ((*ep->reg_udccs & UDCCS_BO_RFS) != 0 + && read_fifo(ep, req)) { + req = NULL; + } + + if (likely (req && ep->desc)) + pio_irq_enable(ep->bEndpointAddress); + } + + /* pio or dma irq handler advances the queue. */ + if (likely(req != NULL)) + list_add_tail(&req->queue, &ep->queue); + local_irq_restore(flags); + + return 0; +} + + +/* + * nuke - dequeue ALL requests + */ +static void nuke(struct pxa25x_ep *ep, int status) +{ + struct pxa25x_request *req; + + /* called with irqs blocked */ + while (!list_empty(&ep->queue)) { + req = list_entry(ep->queue.next, + struct pxa25x_request, + queue); + done(ep, req, status); + } + if (ep->desc) + pio_irq_disable (ep->bEndpointAddress); +} + + +/* dequeue JUST ONE request */ +static int pxa25x_ep_dequeue(struct usb_ep *_ep, struct usb_request *_req) +{ + struct pxa25x_ep *ep; + struct pxa25x_request *req; + unsigned long flags; + + ep = container_of(_ep, struct pxa25x_ep, ep); + if (!_ep || ep->ep.name == ep0name) + return -EINVAL; + + local_irq_save(flags); + + /* make sure it's actually queued on this endpoint */ + list_for_each_entry (req, &ep->queue, queue) { + if (&req->req == _req) + break; + } + if (&req->req != _req) { + local_irq_restore(flags); + return -EINVAL; + } + + done(ep, req, -ECONNRESET); + + local_irq_restore(flags); + return 0; +} + +/*-------------------------------------------------------------------------*/ + +static int pxa25x_ep_set_halt(struct usb_ep *_ep, int value) +{ + struct pxa25x_ep *ep; + unsigned long flags; + + ep = container_of(_ep, struct pxa25x_ep, ep); + if (unlikely (!_ep + || (!ep->desc && ep->ep.name != ep0name)) + || ep->bmAttributes == USB_ENDPOINT_XFER_ISOC) { + DMSG("%s, bad ep\n", __func__); + return -EINVAL; + } + if (value == 0) { + /* this path (reset toggle+halt) is needed to implement + * SET_INTERFACE on normal hardware. but it can't be + * done from software on the PXA UDC, and the hardware + * forgets to do it as part of SET_INTERFACE automagic. + */ + DMSG("only host can clear %s halt\n", _ep->name); + return -EROFS; + } + + local_irq_save(flags); + + if ((ep->bEndpointAddress & USB_DIR_IN) != 0 + && ((*ep->reg_udccs & UDCCS_BI_TFS) == 0 + || !list_empty(&ep->queue))) { + local_irq_restore(flags); + return -EAGAIN; + } + + /* FST bit is the same for control, bulk in, bulk out, interrupt in */ + *ep->reg_udccs = UDCCS_BI_FST|UDCCS_BI_FTF; + + /* ep0 needs special care */ + if (!ep->desc) { + start_watchdog(ep->dev); + ep->dev->req_pending = 0; + ep->dev->ep0state = EP0_STALL; + + /* and bulk/intr endpoints like dropping stalls too */ + } else { + unsigned i; + for (i = 0; i < 1000; i += 20) { + if (*ep->reg_udccs & UDCCS_BI_SST) + break; + udelay(20); + } + } + local_irq_restore(flags); + + DBG(DBG_VERBOSE, "%s halt\n", _ep->name); + return 0; +} + +static int pxa25x_ep_fifo_status(struct usb_ep *_ep) +{ + struct pxa25x_ep *ep; + + ep = container_of(_ep, struct pxa25x_ep, ep); + if (!_ep) { + DMSG("%s, bad ep\n", __func__); + return -ENODEV; + } + /* pxa can't report unclaimed bytes from IN fifos */ + if ((ep->bEndpointAddress & USB_DIR_IN) != 0) + return -EOPNOTSUPP; + if (ep->dev->gadget.speed == USB_SPEED_UNKNOWN + || (*ep->reg_udccs & UDCCS_BO_RFS) == 0) + return 0; + else + return (*ep->reg_ubcr & 0xfff) + 1; +} + +static void pxa25x_ep_fifo_flush(struct usb_ep *_ep) +{ + struct pxa25x_ep *ep; + + ep = container_of(_ep, struct pxa25x_ep, ep); + if (!_ep || ep->ep.name == ep0name || !list_empty(&ep->queue)) { + DMSG("%s, bad ep\n", __func__); + return; + } + + /* toggle and halt bits stay unchanged */ + + /* for OUT, just read and discard the FIFO contents. */ + if ((ep->bEndpointAddress & USB_DIR_IN) == 0) { + while (((*ep->reg_udccs) & UDCCS_BO_RNE) != 0) + (void) *ep->reg_uddr; + return; + } + + /* most IN status is the same, but ISO can't stall */ + *ep->reg_udccs = UDCCS_BI_TPC|UDCCS_BI_FTF|UDCCS_BI_TUR + | (ep->bmAttributes == USB_ENDPOINT_XFER_ISOC) + ? 0 : UDCCS_BI_SST; +} + + +static struct usb_ep_ops pxa25x_ep_ops = { + .enable = pxa25x_ep_enable, + .disable = pxa25x_ep_disable, + + .alloc_request = pxa25x_ep_alloc_request, + .free_request = pxa25x_ep_free_request, + + .queue = pxa25x_ep_queue, + .dequeue = pxa25x_ep_dequeue, + + .set_halt = pxa25x_ep_set_halt, + .fifo_status = pxa25x_ep_fifo_status, + .fifo_flush = pxa25x_ep_fifo_flush, +}; + + +/* --------------------------------------------------------------------------- + * device-scoped parts of the api to the usb controller hardware + * --------------------------------------------------------------------------- + */ + +static int pxa25x_udc_get_frame(struct usb_gadget *_gadget) +{ + return ((UFNRH & 0x07) << 8) | (UFNRL & 0xff); +} + +static int pxa25x_udc_wakeup(struct usb_gadget *_gadget) +{ + /* host may not have enabled remote wakeup */ + if ((UDCCS0 & UDCCS0_DRWF) == 0) + return -EHOSTUNREACH; + udc_set_mask_UDCCR(UDCCR_RSM); + return 0; +} + +static void stop_activity(struct pxa25x_udc *, struct usb_gadget_driver *); +static void udc_enable (struct pxa25x_udc *); +static void udc_disable(struct pxa25x_udc *); + +/* We disable the UDC -- and its 48 MHz clock -- whenever it's not + * in active use. + */ +static int pullup(struct pxa25x_udc *udc) +{ + int is_active = udc->vbus && udc->pullup && !udc->suspended; + DMSG("%s\n", is_active ? "active" : "inactive"); + if (is_active) { + if (!udc->active) { + udc->active = 1; + /* Enable clock for USB device */ + clk_enable(udc->clk); + udc_enable(udc); + } + } else { + if (udc->active) { + if (udc->gadget.speed != USB_SPEED_UNKNOWN) { + DMSG("disconnect %s\n", udc->driver + ? udc->driver->driver.name + : "(no driver)"); + stop_activity(udc, udc->driver); + } + udc_disable(udc); + /* Disable clock for USB device */ + clk_disable(udc->clk); + udc->active = 0; + } + + } + return 0; +} + +/* VBUS reporting logically comes from a transceiver */ +static int pxa25x_udc_vbus_session(struct usb_gadget *_gadget, int is_active) +{ + struct pxa25x_udc *udc; + + udc = container_of(_gadget, struct pxa25x_udc, gadget); + udc->vbus = (is_active != 0); + DMSG("vbus %s\n", is_active ? "supplied" : "inactive"); + pullup(udc); + return 0; +} + +/* drivers may have software control over D+ pullup */ +static int pxa25x_udc_pullup(struct usb_gadget *_gadget, int is_active) +{ + struct pxa25x_udc *udc; + + udc = container_of(_gadget, struct pxa25x_udc, gadget); + + /* not all boards support pullup control */ + if (!udc->mach->gpio_pullup && !udc->mach->udc_command) + return -EOPNOTSUPP; + + udc->pullup = (is_active != 0); + pullup(udc); + return 0; +} + +static const struct usb_gadget_ops pxa25x_udc_ops = { + .get_frame = pxa25x_udc_get_frame, + .wakeup = pxa25x_udc_wakeup, + .vbus_session = pxa25x_udc_vbus_session, + .pullup = pxa25x_udc_pullup, + + // .vbus_draw ... boards may consume current from VBUS, up to + // 100-500mA based on config. the 500uA suspend ceiling means + // that exclusively vbus-powered PXA designs violate USB specs. +}; + +/*-------------------------------------------------------------------------*/ + +#ifdef CONFIG_USB_GADGET_DEBUG_FS + +static int +udc_seq_show(struct seq_file *m, void *_d) +{ + struct pxa25x_udc *dev = m->private; + unsigned long flags; + int i; + u32 tmp; + + local_irq_save(flags); + + /* basic device status */ + seq_printf(m, DRIVER_DESC "\n" + "%s version: %s\nGadget driver: %s\nHost %s\n\n", + driver_name, DRIVER_VERSION SIZE_STR "(pio)", + dev->driver ? dev->driver->driver.name : "(none)", + is_vbus_present() ? "full speed" : "disconnected"); + + /* registers for device and ep0 */ + seq_printf(m, + "uicr %02X.%02X, usir %02X.%02x, ufnr %02X.%02X\n", + UICR1, UICR0, USIR1, USIR0, UFNRH, UFNRL); + + tmp = UDCCR; + seq_printf(m, + "udccr %02X =%s%s%s%s%s%s%s%s\n", tmp, + (tmp & UDCCR_REM) ? " rem" : "", + (tmp & UDCCR_RSTIR) ? " rstir" : "", + (tmp & UDCCR_SRM) ? " srm" : "", + (tmp & UDCCR_SUSIR) ? " susir" : "", + (tmp & UDCCR_RESIR) ? " resir" : "", + (tmp & UDCCR_RSM) ? " rsm" : "", + (tmp & UDCCR_UDA) ? " uda" : "", + (tmp & UDCCR_UDE) ? " ude" : ""); + + tmp = UDCCS0; + seq_printf(m, + "udccs0 %02X =%s%s%s%s%s%s%s%s\n", tmp, + (tmp & UDCCS0_SA) ? " sa" : "", + (tmp & UDCCS0_RNE) ? " rne" : "", + (tmp & UDCCS0_FST) ? " fst" : "", + (tmp & UDCCS0_SST) ? " sst" : "", + (tmp & UDCCS0_DRWF) ? " dwrf" : "", + (tmp & UDCCS0_FTF) ? " ftf" : "", + (tmp & UDCCS0_IPR) ? " ipr" : "", + (tmp & UDCCS0_OPR) ? " opr" : ""); + + if (dev->has_cfr) { + tmp = UDCCFR; + seq_printf(m, + "udccfr %02X =%s%s\n", tmp, + (tmp & UDCCFR_AREN) ? " aren" : "", + (tmp & UDCCFR_ACM) ? " acm" : ""); + } + + if (!is_vbus_present() || !dev->driver) + goto done; + + seq_printf(m, "ep0 IN %lu/%lu, OUT %lu/%lu\nirqs %lu\n\n", + dev->stats.write.bytes, dev->stats.write.ops, + dev->stats.read.bytes, dev->stats.read.ops, + dev->stats.irqs); + + /* dump endpoint queues */ + for (i = 0; i < PXA_UDC_NUM_ENDPOINTS; i++) { + struct pxa25x_ep *ep = &dev->ep [i]; + struct pxa25x_request *req; + + if (i != 0) { + const struct usb_endpoint_descriptor *desc; + + desc = ep->desc; + if (!desc) + continue; + tmp = *dev->ep [i].reg_udccs; + seq_printf(m, + "%s max %d %s udccs %02x irqs %lu\n", + ep->ep.name, le16_to_cpu(desc->wMaxPacketSize), + "pio", tmp, ep->pio_irqs); + /* TODO translate all five groups of udccs bits! */ + + } else /* ep0 should only have one transfer queued */ + seq_printf(m, "ep0 max 16 pio irqs %lu\n", + ep->pio_irqs); + + if (list_empty(&ep->queue)) { + seq_printf(m, "\t(nothing queued)\n"); + continue; + } + list_for_each_entry(req, &ep->queue, queue) { + seq_printf(m, + "\treq %p len %d/%d buf %p\n", + &req->req, req->req.actual, + req->req.length, req->req.buf); + } + } + +done: + local_irq_restore(flags); + return 0; +} + +static int +udc_debugfs_open(struct inode *inode, struct file *file) +{ + return single_open(file, udc_seq_show, inode->i_private); +} + +static const struct file_operations debug_fops = { + .open = udc_debugfs_open, + .read = seq_read, + .llseek = seq_lseek, + .release = single_release, + .owner = THIS_MODULE, +}; + +#define create_debug_files(dev) \ + do { \ + dev->debugfs_udc = debugfs_create_file(dev->gadget.name, \ + S_IRUGO, NULL, dev, &debug_fops); \ + } while (0) +#define remove_debug_files(dev) \ + do { \ + if (dev->debugfs_udc) \ + debugfs_remove(dev->debugfs_udc); \ + } while (0) + +#else /* !CONFIG_USB_GADGET_DEBUG_FILES */ + +#define create_debug_files(dev) do {} while (0) +#define remove_debug_files(dev) do {} while (0) + +#endif /* CONFIG_USB_GADGET_DEBUG_FILES */ + +/*-------------------------------------------------------------------------*/ + +/* + * udc_disable - disable USB device controller + */ +static void udc_disable(struct pxa25x_udc *dev) +{ + /* block all irqs */ + udc_set_mask_UDCCR(UDCCR_SRM|UDCCR_REM); + UICR0 = UICR1 = 0xff; + UFNRH = UFNRH_SIM; + + /* if hardware supports it, disconnect from usb */ + pullup_off(); + + udc_clear_mask_UDCCR(UDCCR_UDE); + + ep0_idle (dev); + dev->gadget.speed = USB_SPEED_UNKNOWN; +} + + +/* + * udc_reinit - initialize software state + */ +static void udc_reinit(struct pxa25x_udc *dev) +{ + u32 i; + + /* device/ep0 records init */ + INIT_LIST_HEAD (&dev->gadget.ep_list); + INIT_LIST_HEAD (&dev->gadget.ep0->ep_list); + dev->ep0state = EP0_IDLE; + + /* basic endpoint records init */ + for (i = 0; i < PXA_UDC_NUM_ENDPOINTS; i++) { + struct pxa25x_ep *ep = &dev->ep[i]; + + if (i != 0) + list_add_tail (&ep->ep.ep_list, &dev->gadget.ep_list); + + ep->desc = NULL; + ep->stopped = 0; + INIT_LIST_HEAD (&ep->queue); + ep->pio_irqs = 0; + } + + /* the rest was statically initialized, and is read-only */ +} + +/* until it's enabled, this UDC should be completely invisible + * to any USB host. + */ +static void udc_enable (struct pxa25x_udc *dev) +{ + udc_clear_mask_UDCCR(UDCCR_UDE); + + /* try to clear these bits before we enable the udc */ + udc_ack_int_UDCCR(UDCCR_SUSIR|/*UDCCR_RSTIR|*/UDCCR_RESIR); + + ep0_idle(dev); + dev->gadget.speed = USB_SPEED_UNKNOWN; + dev->stats.irqs = 0; + + /* + * sequence taken from chapter 12.5.10, PXA250 AppProcDevManual: + * - enable UDC + * - if RESET is already in progress, ack interrupt + * - unmask reset interrupt + */ + udc_set_mask_UDCCR(UDCCR_UDE); + if (!(UDCCR & UDCCR_UDA)) + udc_ack_int_UDCCR(UDCCR_RSTIR); + + if (dev->has_cfr /* UDC_RES2 is defined */) { + /* pxa255 (a0+) can avoid a set_config race that could + * prevent gadget drivers from configuring correctly + */ + UDCCFR = UDCCFR_ACM | UDCCFR_MB1; + } else { + /* "USB test mode" for pxa250 errata 40-42 (stepping a0, a1) + * which could result in missing packets and interrupts. + * supposedly one bit per endpoint, controlling whether it + * double buffers or not; ACM/AREN bits fit into the holes. + * zero bits (like USIR0_IRx) disable double buffering. + */ + UDC_RES1 = 0x00; + UDC_RES2 = 0x00; + } + + /* enable suspend/resume and reset irqs */ + udc_clear_mask_UDCCR(UDCCR_SRM | UDCCR_REM); + + /* enable ep0 irqs */ + UICR0 &= ~UICR0_IM0; + + /* if hardware supports it, pullup D+ and wait for reset */ + pullup_on(); +} + + +/* when a driver is successfully registered, it will receive + * control requests including set_configuration(), which enables + * non-control requests. then usb traffic follows until a + * disconnect is reported. then a host may connect again, or + * the driver might get unbound. + */ +int usb_gadget_register_driver(struct usb_gadget_driver *driver) +{ + struct pxa25x_udc *dev = the_controller; + int retval; + + if (!driver + || driver->speed < USB_SPEED_FULL + || !driver->bind + || !driver->disconnect + || !driver->setup) + return -EINVAL; + if (!dev) + return -ENODEV; + if (dev->driver) + return -EBUSY; + + /* first hook up the driver ... */ + dev->driver = driver; + dev->gadget.dev.driver = &driver->driver; + dev->pullup = 1; + + retval = device_add (&dev->gadget.dev); + if (retval) { +fail: + dev->driver = NULL; + dev->gadget.dev.driver = NULL; + return retval; + } + retval = driver->bind(&dev->gadget); + if (retval) { + DMSG("bind to driver %s --> error %d\n", + driver->driver.name, retval); + device_del (&dev->gadget.dev); + goto fail; + } + + /* ... then enable host detection and ep0; and we're ready + * for set_configuration as well as eventual disconnect. + */ + DMSG("registered gadget driver '%s'\n", driver->driver.name); + pullup(dev); + dump_state(dev); + return 0; +} +EXPORT_SYMBOL(usb_gadget_register_driver); + +static void +stop_activity(struct pxa25x_udc *dev, struct usb_gadget_driver *driver) +{ + int i; + + /* don't disconnect drivers more than once */ + if (dev->gadget.speed == USB_SPEED_UNKNOWN) + driver = NULL; + dev->gadget.speed = USB_SPEED_UNKNOWN; + + /* prevent new request submissions, kill any outstanding requests */ + for (i = 0; i < PXA_UDC_NUM_ENDPOINTS; i++) { + struct pxa25x_ep *ep = &dev->ep[i]; + + ep->stopped = 1; + nuke(ep, -ESHUTDOWN); + } + del_timer_sync(&dev->timer); + + /* report disconnect; the driver is already quiesced */ + if (driver) + driver->disconnect(&dev->gadget); + + /* re-init driver-visible data structures */ + udc_reinit(dev); +} + +int usb_gadget_unregister_driver(struct usb_gadget_driver *driver) +{ + struct pxa25x_udc *dev = the_controller; + + if (!dev) + return -ENODEV; + if (!driver || driver != dev->driver || !driver->unbind) + return -EINVAL; + + local_irq_disable(); + dev->pullup = 0; + pullup(dev); + stop_activity(dev, driver); + local_irq_enable(); + + driver->unbind(&dev->gadget); + dev->gadget.dev.driver = NULL; + dev->driver = NULL; + + device_del (&dev->gadget.dev); + + DMSG("unregistered gadget driver '%s'\n", driver->driver.name); + dump_state(dev); + return 0; +} +EXPORT_SYMBOL(usb_gadget_unregister_driver); + + +/*-------------------------------------------------------------------------*/ + +#ifdef CONFIG_ARCH_LUBBOCK + +/* Lubbock has separate connect and disconnect irqs. More typical designs + * use one GPIO as the VBUS IRQ, and another to control the D+ pullup. + */ + +static irqreturn_t +lubbock_vbus_irq(int irq, void *_dev) +{ + struct pxa25x_udc *dev = _dev; + int vbus; + + dev->stats.irqs++; + switch (irq) { + case LUBBOCK_USB_IRQ: + vbus = 1; + disable_irq(LUBBOCK_USB_IRQ); + enable_irq(LUBBOCK_USB_DISC_IRQ); + break; + case LUBBOCK_USB_DISC_IRQ: + vbus = 0; + disable_irq(LUBBOCK_USB_DISC_IRQ); + enable_irq(LUBBOCK_USB_IRQ); + break; + default: + return IRQ_NONE; + } + + pxa25x_udc_vbus_session(&dev->gadget, vbus); + return IRQ_HANDLED; +} + +#endif + +static irqreturn_t udc_vbus_irq(int irq, void *_dev) +{ + struct pxa25x_udc *dev = _dev; + int vbus = gpio_get_value(dev->mach->gpio_vbus); + + if (dev->mach->gpio_vbus_inverted) + vbus = !vbus; + + pxa25x_udc_vbus_session(&dev->gadget, vbus); + return IRQ_HANDLED; +} + + +/*-------------------------------------------------------------------------*/ + +static inline void clear_ep_state (struct pxa25x_udc *dev) +{ + unsigned i; + + /* hardware SET_{CONFIGURATION,INTERFACE} automagic resets endpoint + * fifos, and pending transactions mustn't be continued in any case. + */ + for (i = 1; i < PXA_UDC_NUM_ENDPOINTS; i++) + nuke(&dev->ep[i], -ECONNABORTED); +} + +static void udc_watchdog(unsigned long _dev) +{ + struct pxa25x_udc *dev = (void *)_dev; + + local_irq_disable(); + if (dev->ep0state == EP0_STALL + && (UDCCS0 & UDCCS0_FST) == 0 + && (UDCCS0 & UDCCS0_SST) == 0) { + UDCCS0 = UDCCS0_FST|UDCCS0_FTF; + DBG(DBG_VERBOSE, "ep0 re-stall\n"); + start_watchdog(dev); + } + local_irq_enable(); +} + +static void handle_ep0 (struct pxa25x_udc *dev) +{ + u32 udccs0 = UDCCS0; + struct pxa25x_ep *ep = &dev->ep [0]; + struct pxa25x_request *req; + union { + struct usb_ctrlrequest r; + u8 raw [8]; + u32 word [2]; + } u; + + if (list_empty(&ep->queue)) + req = NULL; + else + req = list_entry(ep->queue.next, struct pxa25x_request, queue); + + /* clear stall status */ + if (udccs0 & UDCCS0_SST) { + nuke(ep, -EPIPE); + UDCCS0 = UDCCS0_SST; + del_timer(&dev->timer); + ep0_idle(dev); + } + + /* previous request unfinished? non-error iff back-to-back ... */ + if ((udccs0 & UDCCS0_SA) != 0 && dev->ep0state != EP0_IDLE) { + nuke(ep, 0); + del_timer(&dev->timer); + ep0_idle(dev); + } + + switch (dev->ep0state) { + case EP0_IDLE: + /* late-breaking status? */ + udccs0 = UDCCS0; + + /* start control request? */ + if (likely((udccs0 & (UDCCS0_OPR|UDCCS0_SA|UDCCS0_RNE)) + == (UDCCS0_OPR|UDCCS0_SA|UDCCS0_RNE))) { + int i; + + nuke (ep, -EPROTO); + + /* read SETUP packet */ + for (i = 0; i < 8; i++) { + if (unlikely(!(UDCCS0 & UDCCS0_RNE))) { +bad_setup: + DMSG("SETUP %d!\n", i); + goto stall; + } + u.raw [i] = (u8) UDDR0; + } + if (unlikely((UDCCS0 & UDCCS0_RNE) != 0)) + goto bad_setup; + +got_setup: + DBG(DBG_VERBOSE, "SETUP %02x.%02x v%04x i%04x l%04x\n", + u.r.bRequestType, u.r.bRequest, + le16_to_cpu(u.r.wValue), + le16_to_cpu(u.r.wIndex), + le16_to_cpu(u.r.wLength)); + + /* cope with automagic for some standard requests. */ + dev->req_std = (u.r.bRequestType & USB_TYPE_MASK) + == USB_TYPE_STANDARD; + dev->req_config = 0; + dev->req_pending = 1; + switch (u.r.bRequest) { + /* hardware restricts gadget drivers here! */ + case USB_REQ_SET_CONFIGURATION: + if (u.r.bRequestType == USB_RECIP_DEVICE) { + /* reflect hardware's automagic + * up to the gadget driver. + */ +config_change: + dev->req_config = 1; + clear_ep_state(dev); + /* if !has_cfr, there's no synch + * else use AREN (later) not SA|OPR + * USIR0_IR0 acts edge sensitive + */ + } + break; + /* ... and here, even more ... */ + case USB_REQ_SET_INTERFACE: + if (u.r.bRequestType == USB_RECIP_INTERFACE) { + /* udc hardware is broken by design: + * - altsetting may only be zero; + * - hw resets all interfaces' eps; + * - ep reset doesn't include halt(?). + */ + DMSG("broken set_interface (%d/%d)\n", + le16_to_cpu(u.r.wIndex), + le16_to_cpu(u.r.wValue)); + goto config_change; + } + break; + /* hardware was supposed to hide this */ + case USB_REQ_SET_ADDRESS: + if (u.r.bRequestType == USB_RECIP_DEVICE) { + ep0start(dev, 0, "address"); + return; + } + break; + } + + if (u.r.bRequestType & USB_DIR_IN) + dev->ep0state = EP0_IN_DATA_PHASE; + else + dev->ep0state = EP0_OUT_DATA_PHASE; + + i = dev->driver->setup(&dev->gadget, &u.r); + if (i < 0) { + /* hardware automagic preventing STALL... */ + if (dev->req_config) { + /* hardware sometimes neglects to tell + * tell us about config change events, + * so later ones may fail... + */ + WARN("config change %02x fail %d?\n", + u.r.bRequest, i); + return; + /* TODO experiment: if has_cfr, + * hardware didn't ACK; maybe we + * could actually STALL! + */ + } + DBG(DBG_VERBOSE, "protocol STALL, " + "%02x err %d\n", UDCCS0, i); +stall: + /* the watchdog timer helps deal with cases + * where udc seems to clear FST wrongly, and + * then NAKs instead of STALLing. + */ + ep0start(dev, UDCCS0_FST|UDCCS0_FTF, "stall"); + start_watchdog(dev); + dev->ep0state = EP0_STALL; + + /* deferred i/o == no response yet */ + } else if (dev->req_pending) { + if (likely(dev->ep0state == EP0_IN_DATA_PHASE + || dev->req_std || u.r.wLength)) + ep0start(dev, 0, "defer"); + else + ep0start(dev, UDCCS0_IPR, "defer/IPR"); + } + + /* expect at least one data or status stage irq */ + return; + + } else if (likely((udccs0 & (UDCCS0_OPR|UDCCS0_SA)) + == (UDCCS0_OPR|UDCCS0_SA))) { + unsigned i; + + /* pxa210/250 erratum 131 for B0/B1 says RNE lies. + * still observed on a pxa255 a0. + */ + DBG(DBG_VERBOSE, "e131\n"); + nuke(ep, -EPROTO); + + /* read SETUP data, but don't trust it too much */ + for (i = 0; i < 8; i++) + u.raw [i] = (u8) UDDR0; + if ((u.r.bRequestType & USB_RECIP_MASK) + > USB_RECIP_OTHER) + goto stall; + if (u.word [0] == 0 && u.word [1] == 0) + goto stall; + goto got_setup; + } else { + /* some random early IRQ: + * - we acked FST + * - IPR cleared + * - OPR got set, without SA (likely status stage) + */ + UDCCS0 = udccs0 & (UDCCS0_SA|UDCCS0_OPR); + } + break; + case EP0_IN_DATA_PHASE: /* GET_DESCRIPTOR etc */ + if (udccs0 & UDCCS0_OPR) { + UDCCS0 = UDCCS0_OPR|UDCCS0_FTF; + DBG(DBG_VERBOSE, "ep0in premature status\n"); + if (req) + done(ep, req, 0); + ep0_idle(dev); + } else /* irq was IPR clearing */ { + if (req) { + /* this IN packet might finish the request */ + (void) write_ep0_fifo(ep, req); + } /* else IN token before response was written */ + } + break; + case EP0_OUT_DATA_PHASE: /* SET_DESCRIPTOR etc */ + if (udccs0 & UDCCS0_OPR) { + if (req) { + /* this OUT packet might finish the request */ + if (read_ep0_fifo(ep, req)) + done(ep, req, 0); + /* else more OUT packets expected */ + } /* else OUT token before read was issued */ + } else /* irq was IPR clearing */ { + DBG(DBG_VERBOSE, "ep0out premature status\n"); + if (req) + done(ep, req, 0); + ep0_idle(dev); + } + break; + case EP0_END_XFER: + if (req) + done(ep, req, 0); + /* ack control-IN status (maybe in-zlp was skipped) + * also appears after some config change events. + */ + if (udccs0 & UDCCS0_OPR) + UDCCS0 = UDCCS0_OPR; + ep0_idle(dev); + break; + case EP0_STALL: + UDCCS0 = UDCCS0_FST; + break; + } + USIR0 = USIR0_IR0; +} + +static void handle_ep(struct pxa25x_ep *ep) +{ + struct pxa25x_request *req; + int is_in = ep->bEndpointAddress & USB_DIR_IN; + int completed; + u32 udccs, tmp; + + do { + completed = 0; + if (likely (!list_empty(&ep->queue))) + req = list_entry(ep->queue.next, + struct pxa25x_request, queue); + else + req = NULL; + + // TODO check FST handling + + udccs = *ep->reg_udccs; + if (unlikely(is_in)) { /* irq from TPC, SST, or (ISO) TUR */ + tmp = UDCCS_BI_TUR; + if (likely(ep->bmAttributes == USB_ENDPOINT_XFER_BULK)) + tmp |= UDCCS_BI_SST; + tmp &= udccs; + if (likely (tmp)) + *ep->reg_udccs = tmp; + if (req && likely ((udccs & UDCCS_BI_TFS) != 0)) + completed = write_fifo(ep, req); + + } else { /* irq from RPC (or for ISO, ROF) */ + if (likely(ep->bmAttributes == USB_ENDPOINT_XFER_BULK)) + tmp = UDCCS_BO_SST | UDCCS_BO_DME; + else + tmp = UDCCS_IO_ROF | UDCCS_IO_DME; + tmp &= udccs; + if (likely(tmp)) + *ep->reg_udccs = tmp; + + /* fifos can hold packets, ready for reading... */ + if (likely(req)) { + completed = read_fifo(ep, req); + } else + pio_irq_disable (ep->bEndpointAddress); + } + ep->pio_irqs++; + } while (completed); +} + +/* + * pxa25x_udc_irq - interrupt handler + * + * avoid delays in ep0 processing. the control handshaking isn't always + * under software control (pxa250c0 and the pxa255 are better), and delays + * could cause usb protocol errors. + */ +static irqreturn_t +pxa25x_udc_irq(int irq, void *_dev) +{ + struct pxa25x_udc *dev = _dev; + int handled; + + dev->stats.irqs++; + do { + u32 udccr = UDCCR; + + handled = 0; + + /* SUSpend Interrupt Request */ + if (unlikely(udccr & UDCCR_SUSIR)) { + udc_ack_int_UDCCR(UDCCR_SUSIR); + handled = 1; + DBG(DBG_VERBOSE, "USB suspend%s\n", is_vbus_present() + ? "" : "+disconnect"); + + if (!is_vbus_present()) + stop_activity(dev, dev->driver); + else if (dev->gadget.speed != USB_SPEED_UNKNOWN + && dev->driver + && dev->driver->suspend) + dev->driver->suspend(&dev->gadget); + ep0_idle (dev); + } + + /* RESume Interrupt Request */ + if (unlikely(udccr & UDCCR_RESIR)) { + udc_ack_int_UDCCR(UDCCR_RESIR); + handled = 1; + DBG(DBG_VERBOSE, "USB resume\n"); + + if (dev->gadget.speed != USB_SPEED_UNKNOWN + && dev->driver + && dev->driver->resume + && is_vbus_present()) + dev->driver->resume(&dev->gadget); + } + + /* ReSeT Interrupt Request - USB reset */ + if (unlikely(udccr & UDCCR_RSTIR)) { + udc_ack_int_UDCCR(UDCCR_RSTIR); + handled = 1; + + if ((UDCCR & UDCCR_UDA) == 0) { + DBG(DBG_VERBOSE, "USB reset start\n"); + + /* reset driver and endpoints, + * in case that's not yet done + */ + stop_activity (dev, dev->driver); + + } else { + DBG(DBG_VERBOSE, "USB reset end\n"); + dev->gadget.speed = USB_SPEED_FULL; + memset(&dev->stats, 0, sizeof dev->stats); + /* driver and endpoints are still reset */ + } + + } else { + u32 usir0 = USIR0 & ~UICR0; + u32 usir1 = USIR1 & ~UICR1; + int i; + + if (unlikely (!usir0 && !usir1)) + continue; + + DBG(DBG_VERY_NOISY, "irq %02x.%02x\n", usir1, usir0); + + /* control traffic */ + if (usir0 & USIR0_IR0) { + dev->ep[0].pio_irqs++; + handle_ep0(dev); + handled = 1; + } + + /* endpoint data transfers */ + for (i = 0; i < 8; i++) { + u32 tmp = 1 << i; + + if (i && (usir0 & tmp)) { + handle_ep(&dev->ep[i]); + USIR0 |= tmp; + handled = 1; + } + if (usir1 & tmp) { + handle_ep(&dev->ep[i+8]); + USIR1 |= tmp; + handled = 1; + } + } + } + + /* we could also ask for 1 msec SOF (SIR) interrupts */ + + } while (handled); + return IRQ_HANDLED; +} + +/*-------------------------------------------------------------------------*/ + +static void nop_release (struct device *dev) +{ + DMSG("%s %s\n", __func__, dev->bus_id); +} + +/* this uses load-time allocation and initialization (instead of + * doing it at run-time) to save code, eliminate fault paths, and + * be more obviously correct. + */ +static struct pxa25x_udc memory = { + .gadget = { + .ops = &pxa25x_udc_ops, + .ep0 = &memory.ep[0].ep, + .name = driver_name, + .dev = { + .bus_id = "gadget", + .release = nop_release, + }, + }, + + /* control endpoint */ + .ep[0] = { + .ep = { + .name = ep0name, + .ops = &pxa25x_ep_ops, + .maxpacket = EP0_FIFO_SIZE, + }, + .dev = &memory, + .reg_udccs = &UDCCS0, + .reg_uddr = &UDDR0, + }, + + /* first group of endpoints */ + .ep[1] = { + .ep = { + .name = "ep1in-bulk", + .ops = &pxa25x_ep_ops, + .maxpacket = BULK_FIFO_SIZE, + }, + .dev = &memory, + .fifo_size = BULK_FIFO_SIZE, + .bEndpointAddress = USB_DIR_IN | 1, + .bmAttributes = USB_ENDPOINT_XFER_BULK, + .reg_udccs = &UDCCS1, + .reg_uddr = &UDDR1, + }, + .ep[2] = { + .ep = { + .name = "ep2out-bulk", + .ops = &pxa25x_ep_ops, + .maxpacket = BULK_FIFO_SIZE, + }, + .dev = &memory, + .fifo_size = BULK_FIFO_SIZE, + .bEndpointAddress = 2, + .bmAttributes = USB_ENDPOINT_XFER_BULK, + .reg_udccs = &UDCCS2, + .reg_ubcr = &UBCR2, + .reg_uddr = &UDDR2, + }, +#ifndef CONFIG_USB_PXA25X_SMALL + .ep[3] = { + .ep = { + .name = "ep3in-iso", + .ops = &pxa25x_ep_ops, + .maxpacket = ISO_FIFO_SIZE, + }, + .dev = &memory, + .fifo_size = ISO_FIFO_SIZE, + .bEndpointAddress = USB_DIR_IN | 3, + .bmAttributes = USB_ENDPOINT_XFER_ISOC, + .reg_udccs = &UDCCS3, + .reg_uddr = &UDDR3, + }, + .ep[4] = { + .ep = { + .name = "ep4out-iso", + .ops = &pxa25x_ep_ops, + .maxpacket = ISO_FIFO_SIZE, + }, + .dev = &memory, + .fifo_size = ISO_FIFO_SIZE, + .bEndpointAddress = 4, + .bmAttributes = USB_ENDPOINT_XFER_ISOC, + .reg_udccs = &UDCCS4, + .reg_ubcr = &UBCR4, + .reg_uddr = &UDDR4, + }, + .ep[5] = { + .ep = { + .name = "ep5in-int", + .ops = &pxa25x_ep_ops, + .maxpacket = INT_FIFO_SIZE, + }, + .dev = &memory, + .fifo_size = INT_FIFO_SIZE, + .bEndpointAddress = USB_DIR_IN | 5, + .bmAttributes = USB_ENDPOINT_XFER_INT, + .reg_udccs = &UDCCS5, + .reg_uddr = &UDDR5, + }, + + /* second group of endpoints */ + .ep[6] = { + .ep = { + .name = "ep6in-bulk", + .ops = &pxa25x_ep_ops, + .maxpacket = BULK_FIFO_SIZE, + }, + .dev = &memory, + .fifo_size = BULK_FIFO_SIZE, + .bEndpointAddress = USB_DIR_IN | 6, + .bmAttributes = USB_ENDPOINT_XFER_BULK, + .reg_udccs = &UDCCS6, + .reg_uddr = &UDDR6, + }, + .ep[7] = { + .ep = { + .name = "ep7out-bulk", + .ops = &pxa25x_ep_ops, + .maxpacket = BULK_FIFO_SIZE, + }, + .dev = &memory, + .fifo_size = BULK_FIFO_SIZE, + .bEndpointAddress = 7, + .bmAttributes = USB_ENDPOINT_XFER_BULK, + .reg_udccs = &UDCCS7, + .reg_ubcr = &UBCR7, + .reg_uddr = &UDDR7, + }, + .ep[8] = { + .ep = { + .name = "ep8in-iso", + .ops = &pxa25x_ep_ops, + .maxpacket = ISO_FIFO_SIZE, + }, + .dev = &memory, + .fifo_size = ISO_FIFO_SIZE, + .bEndpointAddress = USB_DIR_IN | 8, + .bmAttributes = USB_ENDPOINT_XFER_ISOC, + .reg_udccs = &UDCCS8, + .reg_uddr = &UDDR8, + }, + .ep[9] = { + .ep = { + .name = "ep9out-iso", + .ops = &pxa25x_ep_ops, + .maxpacket = ISO_FIFO_SIZE, + }, + .dev = &memory, + .fifo_size = ISO_FIFO_SIZE, + .bEndpointAddress = 9, + .bmAttributes = USB_ENDPOINT_XFER_ISOC, + .reg_udccs = &UDCCS9, + .reg_ubcr = &UBCR9, + .reg_uddr = &UDDR9, + }, + .ep[10] = { + .ep = { + .name = "ep10in-int", + .ops = &pxa25x_ep_ops, + .maxpacket = INT_FIFO_SIZE, + }, + .dev = &memory, + .fifo_size = INT_FIFO_SIZE, + .bEndpointAddress = USB_DIR_IN | 10, + .bmAttributes = USB_ENDPOINT_XFER_INT, + .reg_udccs = &UDCCS10, + .reg_uddr = &UDDR10, + }, + + /* third group of endpoints */ + .ep[11] = { + .ep = { + .name = "ep11in-bulk", + .ops = &pxa25x_ep_ops, + .maxpacket = BULK_FIFO_SIZE, + }, + .dev = &memory, + .fifo_size = BULK_FIFO_SIZE, + .bEndpointAddress = USB_DIR_IN | 11, + .bmAttributes = USB_ENDPOINT_XFER_BULK, + .reg_udccs = &UDCCS11, + .reg_uddr = &UDDR11, + }, + .ep[12] = { + .ep = { + .name = "ep12out-bulk", + .ops = &pxa25x_ep_ops, + .maxpacket = BULK_FIFO_SIZE, + }, + .dev = &memory, + .fifo_size = BULK_FIFO_SIZE, + .bEndpointAddress = 12, + .bmAttributes = USB_ENDPOINT_XFER_BULK, + .reg_udccs = &UDCCS12, + .reg_ubcr = &UBCR12, + .reg_uddr = &UDDR12, + }, + .ep[13] = { + .ep = { + .name = "ep13in-iso", + .ops = &pxa25x_ep_ops, + .maxpacket = ISO_FIFO_SIZE, + }, + .dev = &memory, + .fifo_size = ISO_FIFO_SIZE, + .bEndpointAddress = USB_DIR_IN | 13, + .bmAttributes = USB_ENDPOINT_XFER_ISOC, + .reg_udccs = &UDCCS13, + .reg_uddr = &UDDR13, + }, + .ep[14] = { + .ep = { + .name = "ep14out-iso", + .ops = &pxa25x_ep_ops, + .maxpacket = ISO_FIFO_SIZE, + }, + .dev = &memory, + .fifo_size = ISO_FIFO_SIZE, + .bEndpointAddress = 14, + .bmAttributes = USB_ENDPOINT_XFER_ISOC, + .reg_udccs = &UDCCS14, + .reg_ubcr = &UBCR14, + .reg_uddr = &UDDR14, + }, + .ep[15] = { + .ep = { + .name = "ep15in-int", + .ops = &pxa25x_ep_ops, + .maxpacket = INT_FIFO_SIZE, + }, + .dev = &memory, + .fifo_size = INT_FIFO_SIZE, + .bEndpointAddress = USB_DIR_IN | 15, + .bmAttributes = USB_ENDPOINT_XFER_INT, + .reg_udccs = &UDCCS15, + .reg_uddr = &UDDR15, + }, +#endif /* !CONFIG_USB_PXA25X_SMALL */ +}; + +#define CP15R0_VENDOR_MASK 0xffffe000 + +#if defined(CONFIG_ARCH_PXA) +#define CP15R0_XSCALE_VALUE 0x69052000 /* intel/arm/xscale */ + +#elif defined(CONFIG_ARCH_IXP4XX) +#define CP15R0_XSCALE_VALUE 0x69054000 /* intel/arm/ixp4xx */ + +#endif + +#define CP15R0_PROD_MASK 0x000003f0 +#define PXA25x 0x00000100 /* and PXA26x */ +#define PXA210 0x00000120 + +#define CP15R0_REV_MASK 0x0000000f + +#define CP15R0_PRODREV_MASK (CP15R0_PROD_MASK | CP15R0_REV_MASK) + +#define PXA255_A0 0x00000106 /* or PXA260_B1 */ +#define PXA250_C0 0x00000105 /* or PXA26x_B0 */ +#define PXA250_B2 0x00000104 +#define PXA250_B1 0x00000103 /* or PXA260_A0 */ +#define PXA250_B0 0x00000102 +#define PXA250_A1 0x00000101 +#define PXA250_A0 0x00000100 + +#define PXA210_C0 0x00000125 +#define PXA210_B2 0x00000124 +#define PXA210_B1 0x00000123 +#define PXA210_B0 0x00000122 +#define IXP425_A0 0x000001c1 +#define IXP425_B0 0x000001f1 +#define IXP465_AD 0x00000200 + +/* + * probe - binds to the platform device + */ +static int __init pxa25x_udc_probe(struct platform_device *pdev) +{ + struct pxa25x_udc *dev = &memory; + int retval, vbus_irq, irq; + u32 chiprev; + + /* insist on Intel/ARM/XScale */ + asm("mrc%? p15, 0, %0, c0, c0" : "=r" (chiprev)); + if ((chiprev & CP15R0_VENDOR_MASK) != CP15R0_XSCALE_VALUE) { + pr_err("%s: not XScale!\n", driver_name); + return -ENODEV; + } + + /* trigger chiprev-specific logic */ + switch (chiprev & CP15R0_PRODREV_MASK) { +#if defined(CONFIG_ARCH_PXA) + case PXA255_A0: + dev->has_cfr = 1; + break; + case PXA250_A0: + case PXA250_A1: + /* A0/A1 "not released"; ep 13, 15 unusable */ + /* fall through */ + case PXA250_B2: case PXA210_B2: + case PXA250_B1: case PXA210_B1: + case PXA250_B0: case PXA210_B0: + /* OUT-DMA is broken ... */ + /* fall through */ + case PXA250_C0: case PXA210_C0: + break; +#elif defined(CONFIG_ARCH_IXP4XX) + case IXP425_A0: + case IXP425_B0: + case IXP465_AD: + dev->has_cfr = 1; + break; +#endif + default: + pr_err("%s: unrecognized processor: %08x\n", + driver_name, chiprev); + /* iop3xx, ixp4xx, ... */ + return -ENODEV; + } + + irq = platform_get_irq(pdev, 0); + if (irq < 0) + return -ENODEV; + + dev->clk = clk_get(&pdev->dev, "UDCCLK"); + if (IS_ERR(dev->clk)) { + retval = PTR_ERR(dev->clk); + goto err_clk; + } + + pr_debug("%s: IRQ %d%s%s\n", driver_name, irq, + dev->has_cfr ? "" : " (!cfr)", + SIZE_STR "(pio)" + ); + + /* other non-static parts of init */ + dev->dev = &pdev->dev; + dev->mach = pdev->dev.platform_data; + + if (dev->mach->gpio_vbus) { + if ((retval = gpio_request(dev->mach->gpio_vbus, + "pxa25x_udc GPIO VBUS"))) { + dev_dbg(&pdev->dev, + "can't get vbus gpio %d, err: %d\n", + dev->mach->gpio_vbus, retval); + goto err_gpio_vbus; + } + gpio_direction_input(dev->mach->gpio_vbus); + vbus_irq = gpio_to_irq(dev->mach->gpio_vbus); + } else + vbus_irq = 0; + + if (dev->mach->gpio_pullup) { + if ((retval = gpio_request(dev->mach->gpio_pullup, + "pca25x_udc GPIO PULLUP"))) { + dev_dbg(&pdev->dev, + "can't get pullup gpio %d, err: %d\n", + dev->mach->gpio_pullup, retval); + goto err_gpio_pullup; + } + gpio_direction_output(dev->mach->gpio_pullup, 0); + } + + init_timer(&dev->timer); + dev->timer.function = udc_watchdog; + dev->timer.data = (unsigned long) dev; + + device_initialize(&dev->gadget.dev); + dev->gadget.dev.parent = &pdev->dev; + dev->gadget.dev.dma_mask = pdev->dev.dma_mask; + + the_controller = dev; + platform_set_drvdata(pdev, dev); + + udc_disable(dev); + udc_reinit(dev); + + dev->vbus = is_vbus_present(); + + /* irq setup after old hardware state is cleaned up */ + retval = request_irq(irq, pxa25x_udc_irq, + IRQF_DISABLED, driver_name, dev); + if (retval != 0) { + pr_err("%s: can't get irq %d, err %d\n", + driver_name, irq, retval); + goto err_irq1; + } + dev->got_irq = 1; + +#ifdef CONFIG_ARCH_LUBBOCK + if (machine_is_lubbock()) { + retval = request_irq(LUBBOCK_USB_DISC_IRQ, + lubbock_vbus_irq, + IRQF_DISABLED | IRQF_SAMPLE_RANDOM, + driver_name, dev); + if (retval != 0) { + pr_err("%s: can't get irq %i, err %d\n", + driver_name, LUBBOCK_USB_DISC_IRQ, retval); +lubbock_fail0: + goto err_irq_lub; + } + retval = request_irq(LUBBOCK_USB_IRQ, + lubbock_vbus_irq, + IRQF_DISABLED | IRQF_SAMPLE_RANDOM, + driver_name, dev); + if (retval != 0) { + pr_err("%s: can't get irq %i, err %d\n", + driver_name, LUBBOCK_USB_IRQ, retval); + free_irq(LUBBOCK_USB_DISC_IRQ, dev); + goto lubbock_fail0; + } + } else +#endif + if (vbus_irq) { + retval = request_irq(vbus_irq, udc_vbus_irq, + IRQF_DISABLED | IRQF_SAMPLE_RANDOM | + IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING, + driver_name, dev); + if (retval != 0) { + pr_err("%s: can't get irq %i, err %d\n", + driver_name, vbus_irq, retval); + goto err_vbus_irq; + } + } + create_debug_files(dev); + + return 0; + + err_vbus_irq: +#ifdef CONFIG_ARCH_LUBBOCK + free_irq(LUBBOCK_USB_DISC_IRQ, dev); + err_irq_lub: +#endif + free_irq(irq, dev); + err_irq1: + if (dev->mach->gpio_pullup) + gpio_free(dev->mach->gpio_pullup); + err_gpio_pullup: + if (dev->mach->gpio_vbus) + gpio_free(dev->mach->gpio_vbus); + err_gpio_vbus: + clk_put(dev->clk); + err_clk: + return retval; +} + +static void pxa25x_udc_shutdown(struct platform_device *_dev) +{ + pullup_off(); +} + +static int __exit pxa25x_udc_remove(struct platform_device *pdev) +{ + struct pxa25x_udc *dev = platform_get_drvdata(pdev); + + if (dev->driver) + return -EBUSY; + + dev->pullup = 0; + pullup(dev); + + remove_debug_files(dev); + + if (dev->got_irq) { + free_irq(platform_get_irq(pdev, 0), dev); + dev->got_irq = 0; + } +#ifdef CONFIG_ARCH_LUBBOCK + if (machine_is_lubbock()) { + free_irq(LUBBOCK_USB_DISC_IRQ, dev); + free_irq(LUBBOCK_USB_IRQ, dev); + } +#endif + if (dev->mach->gpio_vbus) { + free_irq(gpio_to_irq(dev->mach->gpio_vbus), dev); + gpio_free(dev->mach->gpio_vbus); + } + if (dev->mach->gpio_pullup) + gpio_free(dev->mach->gpio_pullup); + + clk_put(dev->clk); + + platform_set_drvdata(pdev, NULL); + the_controller = NULL; + return 0; +} + +/*-------------------------------------------------------------------------*/ + +#ifdef CONFIG_PM + +/* USB suspend (controlled by the host) and system suspend (controlled + * by the PXA) don't necessarily work well together. If USB is active, + * the 48 MHz clock is required; so the system can't enter 33 MHz idle + * mode, or any deeper PM saving state. + * + * For now, we punt and forcibly disconnect from the USB host when PXA + * enters any suspend state. While we're disconnected, we always disable + * the 48MHz USB clock ... allowing PXA sleep and/or 33 MHz idle states. + * Boards without software pullup control shouldn't use those states. + * VBUS IRQs should probably be ignored so that the PXA device just acts + * "dead" to USB hosts until system resume. + */ +static int pxa25x_udc_suspend(struct platform_device *dev, pm_message_t state) +{ + struct pxa25x_udc *udc = platform_get_drvdata(dev); + unsigned long flags; + + if (!udc->mach->gpio_pullup && !udc->mach->udc_command) + WARN("USB host won't detect disconnect!\n"); + udc->suspended = 1; + + local_irq_save(flags); + pullup(udc); + local_irq_restore(flags); + + return 0; +} + +static int pxa25x_udc_resume(struct platform_device *dev) +{ + struct pxa25x_udc *udc = platform_get_drvdata(dev); + unsigned long flags; + + udc->suspended = 0; + local_irq_save(flags); + pullup(udc); + local_irq_restore(flags); + + return 0; +} + +#else +#define pxa25x_udc_suspend NULL +#define pxa25x_udc_resume NULL +#endif + +/*-------------------------------------------------------------------------*/ + +static struct platform_driver udc_driver = { + .shutdown = pxa25x_udc_shutdown, + .remove = __exit_p(pxa25x_udc_remove), + .suspend = pxa25x_udc_suspend, + .resume = pxa25x_udc_resume, + .driver = { + .owner = THIS_MODULE, + .name = "pxa25x-udc", + }, +}; + +static int __init udc_init(void) +{ + pr_info("%s: version %s\n", driver_name, DRIVER_VERSION); + return platform_driver_probe(&udc_driver, pxa25x_udc_probe); +} +module_init(udc_init); + +static void __exit udc_exit(void) +{ + platform_driver_unregister(&udc_driver); +} +module_exit(udc_exit); + +MODULE_DESCRIPTION(DRIVER_DESC); +MODULE_AUTHOR("Frank Becker, Robert Schwebel, David Brownell"); +MODULE_LICENSE("GPL"); +MODULE_ALIAS("platform:pxa25x-udc"); diff --git a/drivers/usb/gadget/pxa25x_udc.h b/drivers/usb/gadget/pxa25x_udc.h new file mode 100644 index 0000000..4d11ece --- /dev/null +++ b/drivers/usb/gadget/pxa25x_udc.h @@ -0,0 +1,266 @@ +/* + * Intel PXA25x on-chip full speed USB device controller + * + * Copyright (C) 2003 Robert Schwebel , Pengutronix + * Copyright (C) 2003 David Brownell + * + * + * 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. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + */ + +#ifndef __LINUX_USB_GADGET_PXA25X_H +#define __LINUX_USB_GADGET_PXA25X_H + +#include + +/*-------------------------------------------------------------------------*/ + +/* pxa25x has this (move to include/asm-arm/arch-pxa/pxa-regs.h) */ +#define UFNRH_SIR (1 << 7) /* SOF interrupt request */ +#define UFNRH_SIM (1 << 6) /* SOF interrupt mask */ +#define UFNRH_IPE14 (1 << 5) /* ISO packet error, ep14 */ +#define UFNRH_IPE9 (1 << 4) /* ISO packet error, ep9 */ +#define UFNRH_IPE4 (1 << 3) /* ISO packet error, ep4 */ + +/* pxa255 has this (move to include/asm-arm/arch-pxa/pxa-regs.h) */ +#define UDCCFR UDC_RES2 /* UDC Control Function Register */ +#define UDCCFR_AREN (1 << 7) /* ACK response enable (now) */ +#define UDCCFR_ACM (1 << 2) /* ACK control mode (wait for AREN) */ + +/* latest pxa255 errata define new "must be one" bits in UDCCFR */ +#define UDCCFR_MB1 (0xff & ~(UDCCFR_AREN|UDCCFR_ACM)) + +/*-------------------------------------------------------------------------*/ + +struct pxa25x_udc; + +struct pxa25x_ep { + struct usb_ep ep; + struct pxa25x_udc *dev; + + const struct usb_endpoint_descriptor *desc; + struct list_head queue; + unsigned long pio_irqs; + + unsigned short fifo_size; + u8 bEndpointAddress; + u8 bmAttributes; + + unsigned stopped : 1; + unsigned dma_fixup : 1; + + /* UDCCS = UDC Control/Status for this EP + * UBCR = UDC Byte Count Remaining (contents of OUT fifo) + * UDDR = UDC Endpoint Data Register (the fifo) + * DRCM = DMA Request Channel Map + */ + volatile u32 *reg_udccs; + volatile u32 *reg_ubcr; + volatile u32 *reg_uddr; +}; + +struct pxa25x_request { + struct usb_request req; + struct list_head queue; +}; + +enum ep0_state { + EP0_IDLE, + EP0_IN_DATA_PHASE, + EP0_OUT_DATA_PHASE, + EP0_END_XFER, + EP0_STALL, +}; + +#define EP0_FIFO_SIZE ((unsigned)16) +#define BULK_FIFO_SIZE ((unsigned)64) +#define ISO_FIFO_SIZE ((unsigned)256) +#define INT_FIFO_SIZE ((unsigned)8) + +struct udc_stats { + struct ep0stats { + unsigned long ops; + unsigned long bytes; + } read, write; + unsigned long irqs; +}; + +#ifdef CONFIG_USB_PXA25X_SMALL +/* when memory's tight, SMALL config saves code+data. */ +#define PXA_UDC_NUM_ENDPOINTS 3 +#endif + +#ifndef PXA_UDC_NUM_ENDPOINTS +#define PXA_UDC_NUM_ENDPOINTS 16 +#endif + +struct pxa25x_udc { + struct usb_gadget gadget; + struct usb_gadget_driver *driver; + + enum ep0_state ep0state; + struct udc_stats stats; + unsigned got_irq : 1, + vbus : 1, + pullup : 1, + has_cfr : 1, + req_pending : 1, + req_std : 1, + req_config : 1, + suspended : 1, + active : 1; + +#define start_watchdog(dev) mod_timer(&dev->timer, jiffies + (HZ/200)) + struct timer_list timer; + + struct device *dev; + struct clk *clk; + struct pxa2xx_udc_mach_info *mach; + u64 dma_mask; + struct pxa25x_ep ep [PXA_UDC_NUM_ENDPOINTS]; + +#ifdef CONFIG_USB_GADGET_DEBUG_FS + struct dentry *debugfs_udc; +#endif +}; + +/*-------------------------------------------------------------------------*/ + +#ifdef CONFIG_ARCH_LUBBOCK +#include +/* lubbock can also report usb connect/disconnect irqs */ +#endif + +static struct pxa25x_udc *the_controller; + +/*-------------------------------------------------------------------------*/ + +/* + * Debugging support vanishes in non-debug builds. DBG_NORMAL should be + * mostly silent during normal use/testing, with no timing side-effects. + */ +#define DBG_NORMAL 1 /* error paths, device state transitions */ +#define DBG_VERBOSE 2 /* add some success path trace info */ +#define DBG_NOISY 3 /* ... even more: request level */ +#define DBG_VERY_NOISY 4 /* ... even more: packet level */ + +#define DMSG(stuff...) pr_debug("udc: " stuff) + +#ifdef DEBUG + +static int is_vbus_present(void); + +static const char *state_name[] = { + "EP0_IDLE", + "EP0_IN_DATA_PHASE", "EP0_OUT_DATA_PHASE", + "EP0_END_XFER", "EP0_STALL" +}; + +#ifdef VERBOSE_DEBUG +# define UDC_DEBUG DBG_VERBOSE +#else +# define UDC_DEBUG DBG_NORMAL +#endif + +static void __maybe_unused +dump_udccr(const char *label) +{ + u32 udccr = UDCCR; + DMSG("%s %02X =%s%s%s%s%s%s%s%s\n", + label, udccr, + (udccr & UDCCR_REM) ? " rem" : "", + (udccr & UDCCR_RSTIR) ? " rstir" : "", + (udccr & UDCCR_SRM) ? " srm" : "", + (udccr & UDCCR_SUSIR) ? " susir" : "", + (udccr & UDCCR_RESIR) ? " resir" : "", + (udccr & UDCCR_RSM) ? " rsm" : "", + (udccr & UDCCR_UDA) ? " uda" : "", + (udccr & UDCCR_UDE) ? " ude" : ""); +} + +static void __maybe_unused +dump_udccs0(const char *label) +{ + u32 udccs0 = UDCCS0; + + DMSG("%s %s %02X =%s%s%s%s%s%s%s%s\n", + label, state_name[the_controller->ep0state], udccs0, + (udccs0 & UDCCS0_SA) ? " sa" : "", + (udccs0 & UDCCS0_RNE) ? " rne" : "", + (udccs0 & UDCCS0_FST) ? " fst" : "", + (udccs0 & UDCCS0_SST) ? " sst" : "", + (udccs0 & UDCCS0_DRWF) ? " dwrf" : "", + (udccs0 & UDCCS0_FTF) ? " ftf" : "", + (udccs0 & UDCCS0_IPR) ? " ipr" : "", + (udccs0 & UDCCS0_OPR) ? " opr" : ""); +} + +static void __maybe_unused +dump_state(struct pxa25x_udc *dev) +{ + u32 tmp; + unsigned i; + + DMSG("%s %s, uicr %02X.%02X, usir %02X.%02x, ufnr %02X.%02X\n", + is_vbus_present() ? "host " : "disconnected", + state_name[dev->ep0state], + UICR1, UICR0, USIR1, USIR0, UFNRH, UFNRL); + dump_udccr("udccr"); + if (dev->has_cfr) { + tmp = UDCCFR; + DMSG("udccfr %02X =%s%s\n", tmp, + (tmp & UDCCFR_AREN) ? " aren" : "", + (tmp & UDCCFR_ACM) ? " acm" : ""); + } + + if (!dev->driver) { + DMSG("no gadget driver bound\n"); + return; + } else + DMSG("ep0 driver '%s'\n", dev->driver->driver.name); + + if (!is_vbus_present()) + return; + + dump_udccs0 ("udccs0"); + DMSG("ep0 IN %lu/%lu, OUT %lu/%lu\n", + dev->stats.write.bytes, dev->stats.write.ops, + dev->stats.read.bytes, dev->stats.read.ops); + + for (i = 1; i < PXA_UDC_NUM_ENDPOINTS; i++) { + if (dev->ep [i].desc == NULL) + continue; + DMSG ("udccs%d = %02x\n", i, *dev->ep->reg_udccs); + } +} + +#else + +#define dump_udccr(x) do{}while(0) +#define dump_udccs0(x) do{}while(0) +#define dump_state(x) do{}while(0) + +#define UDC_DEBUG ((unsigned)0) + +#endif + +#define DBG(lvl, stuff...) do{if ((lvl) <= UDC_DEBUG) DMSG(stuff);}while(0) + +#define ERR(stuff...) pr_err("udc: " stuff) +#define WARN(stuff...) pr_warning("udc: " stuff) +#define INFO(stuff...) pr_info("udc: " stuff) + + +#endif /* __LINUX_USB_GADGET_PXA25X_H */ diff --git a/drivers/usb/gadget/pxa27x_udc.c b/drivers/usb/gadget/pxa27x_udc.c index 40d6b58..4771b13 100644 --- a/drivers/usb/gadget/pxa27x_udc.c +++ b/drivers/usb/gadget/pxa27x_udc.c @@ -2367,11 +2367,11 @@ static int pxa_udc_resume(struct platform_device *_dev) #endif /* work with hotplug and coldplug */ -MODULE_ALIAS("platform:pxa2xx-udc"); +MODULE_ALIAS("platform:pxa27x-udc"); static struct platform_driver udc_driver = { .driver = { - .name = "pxa2xx-udc", + .name = "pxa27x-udc", .owner = THIS_MODULE, }, .remove = __exit_p(pxa_udc_remove), diff --git a/drivers/usb/gadget/pxa2xx_udc.c b/drivers/usb/gadget/pxa2xx_udc.c deleted file mode 100644 index 63db96a..0000000 --- a/drivers/usb/gadget/pxa2xx_udc.c +++ /dev/null @@ -1,2389 +0,0 @@ -/* - * linux/drivers/usb/gadget/pxa2xx_udc.c - * Intel PXA25x and IXP4xx on-chip full speed USB device controllers - * - * Copyright (C) 2002 Intrinsyc, Inc. (Frank Becker) - * Copyright (C) 2003 Robert Schwebel, Pengutronix - * Copyright (C) 2003 Benedikt Spranger, Pengutronix - * Copyright (C) 2003 David Brownell - * Copyright (C) 2003 Joshua Wise - * - * 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. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA - * - */ - -/* #define VERBOSE_DEBUG */ - -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include - -#include -#include -#include -#include -#include -#include - -#include -#include - -/* - * This driver is PXA25x only. Grab the right register definitions. - */ -#ifdef CONFIG_ARCH_PXA -#include -#endif - -#include - - -/* - * This driver handles the USB Device Controller (UDC) in Intel's PXA 25x - * series processors. The UDC for the IXP 4xx series is very similar. - * There are fifteen endpoints, in addition to ep0. - * - * Such controller drivers work with a gadget driver. The gadget driver - * returns descriptors, implements configuration and data protocols used - * by the host to interact with this device, and allocates endpoints to - * the different protocol interfaces. The controller driver virtualizes - * usb hardware so that the gadget drivers will be more portable. - * - * This UDC hardware wants to implement a bit too much USB protocol, so - * it constrains the sorts of USB configuration change events that work. - * The errata for these chips are misleading; some "fixed" bugs from - * pxa250 a0/a1 b0/b1/b2 sure act like they're still there. - * - * Note that the UDC hardware supports DMA (except on IXP) but that's - * not used here. IN-DMA (to host) is simple enough, when the data is - * suitably aligned (16 bytes) ... the network stack doesn't do that, - * other software can. OUT-DMA is buggy in most chip versions, as well - * as poorly designed (data toggle not automatic). So this driver won't - * bother using DMA. (Mostly-working IN-DMA support was available in - * kernels before 2.6.23, but was never enabled or well tested.) - */ - -#define DRIVER_VERSION "30-June-2007" -#define DRIVER_DESC "PXA 25x USB Device Controller driver" - - -static const char driver_name [] = "pxa2xx_udc"; - -static const char ep0name [] = "ep0"; - - -#ifdef CONFIG_ARCH_IXP4XX - -/* cpu-specific register addresses are compiled in to this code */ -#ifdef CONFIG_ARCH_PXA -#error "Can't configure both IXP and PXA" -#endif - -/* IXP doesn't yet support */ -#define clk_get(dev,name) NULL -#define clk_enable(clk) do { } while (0) -#define clk_disable(clk) do { } while (0) -#define clk_put(clk) do { } while (0) - -#endif - -#include "pxa2xx_udc.h" - - -#ifdef CONFIG_USB_PXA2XX_SMALL -#define SIZE_STR " (small)" -#else -#define SIZE_STR "" -#endif - -/* --------------------------------------------------------------------------- - * endpoint related parts of the api to the usb controller hardware, - * used by gadget driver; and the inner talker-to-hardware core. - * --------------------------------------------------------------------------- - */ - -static void pxa2xx_ep_fifo_flush (struct usb_ep *ep); -static void nuke (struct pxa2xx_ep *, int status); - -/* one GPIO should be used to detect VBUS from the host */ -static int is_vbus_present(void) -{ - struct pxa2xx_udc_mach_info *mach = the_controller->mach; - - if (mach->gpio_vbus) { - int value = gpio_get_value(mach->gpio_vbus); - return mach->gpio_vbus_inverted ? !value : value; - } - if (mach->udc_is_connected) - return mach->udc_is_connected(); - return 1; -} - -/* one GPIO should control a D+ pullup, so host sees this device (or not) */ -static void pullup_off(void) -{ - struct pxa2xx_udc_mach_info *mach = the_controller->mach; - - if (mach->gpio_pullup) - gpio_set_value(mach->gpio_pullup, 0); - else if (mach->udc_command) - mach->udc_command(PXA2XX_UDC_CMD_DISCONNECT); -} - -static void pullup_on(void) -{ - struct pxa2xx_udc_mach_info *mach = the_controller->mach; - - if (mach->gpio_pullup) - gpio_set_value(mach->gpio_pullup, 1); - else if (mach->udc_command) - mach->udc_command(PXA2XX_UDC_CMD_CONNECT); -} - -static void pio_irq_enable(int bEndpointAddress) -{ - bEndpointAddress &= 0xf; - if (bEndpointAddress < 8) - UICR0 &= ~(1 << bEndpointAddress); - else { - bEndpointAddress -= 8; - UICR1 &= ~(1 << bEndpointAddress); - } -} - -static void pio_irq_disable(int bEndpointAddress) -{ - bEndpointAddress &= 0xf; - if (bEndpointAddress < 8) - UICR0 |= 1 << bEndpointAddress; - else { - bEndpointAddress -= 8; - UICR1 |= 1 << bEndpointAddress; - } -} - -/* The UDCCR reg contains mask and interrupt status bits, - * so using '|=' isn't safe as it may ack an interrupt. - */ -#define UDCCR_MASK_BITS (UDCCR_REM | UDCCR_SRM | UDCCR_UDE) - -static inline void udc_set_mask_UDCCR(int mask) -{ - UDCCR = (UDCCR & UDCCR_MASK_BITS) | (mask & UDCCR_MASK_BITS); -} - -static inline void udc_clear_mask_UDCCR(int mask) -{ - UDCCR = (UDCCR & UDCCR_MASK_BITS) & ~(mask & UDCCR_MASK_BITS); -} - -static inline void udc_ack_int_UDCCR(int mask) -{ - /* udccr contains the bits we dont want to change */ - __u32 udccr = UDCCR & UDCCR_MASK_BITS; - - UDCCR = udccr | (mask & ~UDCCR_MASK_BITS); -} - -/* - * endpoint enable/disable - * - * we need to verify the descriptors used to enable endpoints. since pxa2xx - * endpoint configurations are fixed, and are pretty much always enabled, - * there's not a lot to manage here. - * - * because pxa2xx can't selectively initialize bulk (or interrupt) endpoints, - * (resetting endpoint halt and toggle), SET_INTERFACE is unusable except - * for a single interface (with only the default altsetting) and for gadget - * drivers that don't halt endpoints (not reset by set_interface). that also - * means that if you use ISO, you must violate the USB spec rule that all - * iso endpoints must be in non-default altsettings. - */ -static int pxa2xx_ep_enable (struct usb_ep *_ep, - const struct usb_endpoint_descriptor *desc) -{ - struct pxa2xx_ep *ep; - struct pxa2xx_udc *dev; - - ep = container_of (_ep, struct pxa2xx_ep, ep); - if (!_ep || !desc || ep->desc || _ep->name == ep0name - || desc->bDescriptorType != USB_DT_ENDPOINT - || ep->bEndpointAddress != desc->bEndpointAddress - || ep->fifo_size < le16_to_cpu - (desc->wMaxPacketSize)) { - DMSG("%s, bad ep or descriptor\n", __func__); - return -EINVAL; - } - - /* xfer types must match, except that interrupt ~= bulk */ - if (ep->bmAttributes != desc->bmAttributes - && ep->bmAttributes != USB_ENDPOINT_XFER_BULK - && desc->bmAttributes != USB_ENDPOINT_XFER_INT) { - DMSG("%s, %s type mismatch\n", __func__, _ep->name); - return -EINVAL; - } - - /* hardware _could_ do smaller, but driver doesn't */ - if ((desc->bmAttributes == USB_ENDPOINT_XFER_BULK - && le16_to_cpu (desc->wMaxPacketSize) - != BULK_FIFO_SIZE) - || !desc->wMaxPacketSize) { - DMSG("%s, bad %s maxpacket\n", __func__, _ep->name); - return -ERANGE; - } - - dev = ep->dev; - if (!dev->driver || dev->gadget.speed == USB_SPEED_UNKNOWN) { - DMSG("%s, bogus device state\n", __func__); - return -ESHUTDOWN; - } - - ep->desc = desc; - ep->stopped = 0; - ep->pio_irqs = 0; - ep->ep.maxpacket = le16_to_cpu (desc->wMaxPacketSize); - - /* flush fifo (mostly for OUT buffers) */ - pxa2xx_ep_fifo_flush (_ep); - - /* ... reset halt state too, if we could ... */ - - DBG(DBG_VERBOSE, "enabled %s\n", _ep->name); - return 0; -} - -static int pxa2xx_ep_disable (struct usb_ep *_ep) -{ - struct pxa2xx_ep *ep; - unsigned long flags; - - ep = container_of (_ep, struct pxa2xx_ep, ep); - if (!_ep || !ep->desc) { - DMSG("%s, %s not enabled\n", __func__, - _ep ? ep->ep.name : NULL); - return -EINVAL; - } - local_irq_save(flags); - - nuke (ep, -ESHUTDOWN); - - /* flush fifo (mostly for IN buffers) */ - pxa2xx_ep_fifo_flush (_ep); - - ep->desc = NULL; - ep->stopped = 1; - - local_irq_restore(flags); - DBG(DBG_VERBOSE, "%s disabled\n", _ep->name); - return 0; -} - -/*-------------------------------------------------------------------------*/ - -/* for the pxa2xx, these can just wrap kmalloc/kfree. gadget drivers - * must still pass correctly initialized endpoints, since other controller - * drivers may care about how it's currently set up (dma issues etc). - */ - -/* - * pxa2xx_ep_alloc_request - allocate a request data structure - */ -static struct usb_request * -pxa2xx_ep_alloc_request (struct usb_ep *_ep, gfp_t gfp_flags) -{ - struct pxa2xx_request *req; - - req = kzalloc(sizeof(*req), gfp_flags); - if (!req) - return NULL; - - INIT_LIST_HEAD (&req->queue); - return &req->req; -} - - -/* - * pxa2xx_ep_free_request - deallocate a request data structure - */ -static void -pxa2xx_ep_free_request (struct usb_ep *_ep, struct usb_request *_req) -{ - struct pxa2xx_request *req; - - req = container_of (_req, struct pxa2xx_request, req); - WARN_ON (!list_empty (&req->queue)); - kfree(req); -} - -/*-------------------------------------------------------------------------*/ - -/* - * done - retire a request; caller blocked irqs - */ -static void done(struct pxa2xx_ep *ep, struct pxa2xx_request *req, int status) -{ - unsigned stopped = ep->stopped; - - list_del_init(&req->queue); - - if (likely (req->req.status == -EINPROGRESS)) - req->req.status = status; - else - status = req->req.status; - - if (status && status != -ESHUTDOWN) - DBG(DBG_VERBOSE, "complete %s req %p stat %d len %u/%u\n", - ep->ep.name, &req->req, status, - req->req.actual, req->req.length); - - /* don't modify queue heads during completion callback */ - ep->stopped = 1; - req->req.complete(&ep->ep, &req->req); - ep->stopped = stopped; -} - - -static inline void ep0_idle (struct pxa2xx_udc *dev) -{ - dev->ep0state = EP0_IDLE; -} - -static int -write_packet(volatile u32 *uddr, struct pxa2xx_request *req, unsigned max) -{ - u8 *buf; - unsigned length, count; - - buf = req->req.buf + req->req.actual; - prefetch(buf); - - /* how big will this packet be? */ - length = min(req->req.length - req->req.actual, max); - req->req.actual += length; - - count = length; - while (likely(count--)) - *uddr = *buf++; - - return length; -} - -/* - * write to an IN endpoint fifo, as many packets as possible. - * irqs will use this to write the rest later. - * caller guarantees at least one packet buffer is ready (or a zlp). - */ -static int -write_fifo (struct pxa2xx_ep *ep, struct pxa2xx_request *req) -{ - unsigned max; - - max = le16_to_cpu(ep->desc->wMaxPacketSize); - do { - unsigned count; - int is_last, is_short; - - count = write_packet(ep->reg_uddr, req, max); - - /* last packet is usually short (or a zlp) */ - if (unlikely (count != max)) - is_last = is_short = 1; - else { - if (likely(req->req.length != req->req.actual) - || req->req.zero) - is_last = 0; - else - is_last = 1; - /* interrupt/iso maxpacket may not fill the fifo */ - is_short = unlikely (max < ep->fifo_size); - } - - DBG(DBG_VERY_NOISY, "wrote %s %d bytes%s%s %d left %p\n", - ep->ep.name, count, - is_last ? "/L" : "", is_short ? "/S" : "", - req->req.length - req->req.actual, req); - - /* let loose that packet. maybe try writing another one, - * double buffering might work. TSP, TPC, and TFS - * bit values are the same for all normal IN endpoints. - */ - *ep->reg_udccs = UDCCS_BI_TPC; - if (is_short) - *ep->reg_udccs = UDCCS_BI_TSP; - - /* requests complete when all IN data is in the FIFO */ - if (is_last) { - done (ep, req, 0); - if (list_empty(&ep->queue)) - pio_irq_disable (ep->bEndpointAddress); - return 1; - } - - // TODO experiment: how robust can fifo mode tweaking be? - // double buffering is off in the default fifo mode, which - // prevents TFS from being set here. - - } while (*ep->reg_udccs & UDCCS_BI_TFS); - return 0; -} - -/* caller asserts req->pending (ep0 irq status nyet cleared); starts - * ep0 data stage. these chips want very simple state transitions. - */ -static inline -void ep0start(struct pxa2xx_udc *dev, u32 flags, const char *tag) -{ - UDCCS0 = flags|UDCCS0_SA|UDCCS0_OPR; - USIR0 = USIR0_IR0; - dev->req_pending = 0; - DBG(DBG_VERY_NOISY, "%s %s, %02x/%02x\n", - __func__, tag, UDCCS0, flags); -} - -static int -write_ep0_fifo (struct pxa2xx_ep *ep, struct pxa2xx_request *req) -{ - unsigned count; - int is_short; - - count = write_packet(&UDDR0, req, EP0_FIFO_SIZE); - ep->dev->stats.write.bytes += count; - - /* last packet "must be" short (or a zlp) */ - is_short = (count != EP0_FIFO_SIZE); - - DBG(DBG_VERY_NOISY, "ep0in %d bytes %d left %p\n", count, - req->req.length - req->req.actual, req); - - if (unlikely (is_short)) { - if (ep->dev->req_pending) - ep0start(ep->dev, UDCCS0_IPR, "short IN"); - else - UDCCS0 = UDCCS0_IPR; - - count = req->req.length; - done (ep, req, 0); - ep0_idle(ep->dev); -#ifndef CONFIG_ARCH_IXP4XX -#if 1 - /* This seems to get rid of lost status irqs in some cases: - * host responds quickly, or next request involves config - * change automagic, or should have been hidden, or ... - * - * FIXME get rid of all udelays possible... - */ - if (count >= EP0_FIFO_SIZE) { - count = 100; - do { - if ((UDCCS0 & UDCCS0_OPR) != 0) { - /* clear OPR, generate ack */ - UDCCS0 = UDCCS0_OPR; - break; - } - count--; - udelay(1); - } while (count); - } -#endif -#endif - } else if (ep->dev->req_pending) - ep0start(ep->dev, 0, "IN"); - return is_short; -} - - -/* - * read_fifo - unload packet(s) from the fifo we use for usb OUT - * transfers and put them into the request. caller should have made - * sure there's at least one packet ready. - * - * returns true if the request completed because of short packet or the - * request buffer having filled (and maybe overran till end-of-packet). - */ -static int -read_fifo (struct pxa2xx_ep *ep, struct pxa2xx_request *req) -{ - for (;;) { - u32 udccs; - u8 *buf; - unsigned bufferspace, count, is_short; - - /* make sure there's a packet in the FIFO. - * UDCCS_{BO,IO}_RPC are all the same bit value. - * UDCCS_{BO,IO}_RNE are all the same bit value. - */ - udccs = *ep->reg_udccs; - if (unlikely ((udccs & UDCCS_BO_RPC) == 0)) - break; - buf = req->req.buf + req->req.actual; - prefetchw(buf); - bufferspace = req->req.length - req->req.actual; - - /* read all bytes from this packet */ - if (likely (udccs & UDCCS_BO_RNE)) { - count = 1 + (0x0ff & *ep->reg_ubcr); - req->req.actual += min (count, bufferspace); - } else /* zlp */ - count = 0; - is_short = (count < ep->ep.maxpacket); - DBG(DBG_VERY_NOISY, "read %s %02x, %d bytes%s req %p %d/%d\n", - ep->ep.name, udccs, count, - is_short ? "/S" : "", - req, req->req.actual, req->req.length); - while (likely (count-- != 0)) { - u8 byte = (u8) *ep->reg_uddr; - - if (unlikely (bufferspace == 0)) { - /* this happens when the driver's buffer - * is smaller than what the host sent. - * discard the extra data. - */ - if (req->req.status != -EOVERFLOW) - DMSG("%s overflow %d\n", - ep->ep.name, count); - req->req.status = -EOVERFLOW; - } else { - *buf++ = byte; - bufferspace--; - } - } - *ep->reg_udccs = UDCCS_BO_RPC; - /* RPC/RSP/RNE could now reflect the other packet buffer */ - - /* iso is one request per packet */ - if (ep->bmAttributes == USB_ENDPOINT_XFER_ISOC) { - if (udccs & UDCCS_IO_ROF) - req->req.status = -EHOSTUNREACH; - /* more like "is_done" */ - is_short = 1; - } - - /* completion */ - if (is_short || req->req.actual == req->req.length) { - done (ep, req, 0); - if (list_empty(&ep->queue)) - pio_irq_disable (ep->bEndpointAddress); - return 1; - } - - /* finished that packet. the next one may be waiting... */ - } - return 0; -} - -/* - * special ep0 version of the above. no UBCR0 or double buffering; status - * handshaking is magic. most device protocols don't need control-OUT. - * CDC vendor commands (and RNDIS), mass storage CB/CBI, and some other - * protocols do use them. - */ -static int -read_ep0_fifo (struct pxa2xx_ep *ep, struct pxa2xx_request *req) -{ - u8 *buf, byte; - unsigned bufferspace; - - buf = req->req.buf + req->req.actual; - bufferspace = req->req.length - req->req.actual; - - while (UDCCS0 & UDCCS0_RNE) { - byte = (u8) UDDR0; - - if (unlikely (bufferspace == 0)) { - /* this happens when the driver's buffer - * is smaller than what the host sent. - * discard the extra data. - */ - if (req->req.status != -EOVERFLOW) - DMSG("%s overflow\n", ep->ep.name); - req->req.status = -EOVERFLOW; - } else { - *buf++ = byte; - req->req.actual++; - bufferspace--; - } - } - - UDCCS0 = UDCCS0_OPR | UDCCS0_IPR; - - /* completion */ - if (req->req.actual >= req->req.length) - return 1; - - /* finished that packet. the next one may be waiting... */ - return 0; -} - -/*-------------------------------------------------------------------------*/ - -static int -pxa2xx_ep_queue(struct usb_ep *_ep, struct usb_request *_req, gfp_t gfp_flags) -{ - struct pxa2xx_request *req; - struct pxa2xx_ep *ep; - struct pxa2xx_udc *dev; - unsigned long flags; - - req = container_of(_req, struct pxa2xx_request, req); - if (unlikely (!_req || !_req->complete || !_req->buf - || !list_empty(&req->queue))) { - DMSG("%s, bad params\n", __func__); - return -EINVAL; - } - - ep = container_of(_ep, struct pxa2xx_ep, ep); - if (unlikely (!_ep || (!ep->desc && ep->ep.name != ep0name))) { - DMSG("%s, bad ep\n", __func__); - return -EINVAL; - } - - dev = ep->dev; - if (unlikely (!dev->driver - || dev->gadget.speed == USB_SPEED_UNKNOWN)) { - DMSG("%s, bogus device state\n", __func__); - return -ESHUTDOWN; - } - - /* iso is always one packet per request, that's the only way - * we can report per-packet status. that also helps with dma. - */ - if (unlikely (ep->bmAttributes == USB_ENDPOINT_XFER_ISOC - && req->req.length > le16_to_cpu - (ep->desc->wMaxPacketSize))) - return -EMSGSIZE; - - DBG(DBG_NOISY, "%s queue req %p, len %d buf %p\n", - _ep->name, _req, _req->length, _req->buf); - - local_irq_save(flags); - - _req->status = -EINPROGRESS; - _req->actual = 0; - - /* kickstart this i/o queue? */ - if (list_empty(&ep->queue) && !ep->stopped) { - if (ep->desc == NULL/* ep0 */) { - unsigned length = _req->length; - - switch (dev->ep0state) { - case EP0_IN_DATA_PHASE: - dev->stats.write.ops++; - if (write_ep0_fifo(ep, req)) - req = NULL; - break; - - case EP0_OUT_DATA_PHASE: - dev->stats.read.ops++; - /* messy ... */ - if (dev->req_config) { - DBG(DBG_VERBOSE, "ep0 config ack%s\n", - dev->has_cfr ? "" : " raced"); - if (dev->has_cfr) - UDCCFR = UDCCFR_AREN|UDCCFR_ACM - |UDCCFR_MB1; - done(ep, req, 0); - dev->ep0state = EP0_END_XFER; - local_irq_restore (flags); - return 0; - } - if (dev->req_pending) - ep0start(dev, UDCCS0_IPR, "OUT"); - if (length == 0 || ((UDCCS0 & UDCCS0_RNE) != 0 - && read_ep0_fifo(ep, req))) { - ep0_idle(dev); - done(ep, req, 0); - req = NULL; - } - break; - - default: - DMSG("ep0 i/o, odd state %d\n", dev->ep0state); - local_irq_restore (flags); - return -EL2HLT; - } - /* can the FIFO can satisfy the request immediately? */ - } else if ((ep->bEndpointAddress & USB_DIR_IN) != 0) { - if ((*ep->reg_udccs & UDCCS_BI_TFS) != 0 - && write_fifo(ep, req)) - req = NULL; - } else if ((*ep->reg_udccs & UDCCS_BO_RFS) != 0 - && read_fifo(ep, req)) { - req = NULL; - } - - if (likely (req && ep->desc)) - pio_irq_enable(ep->bEndpointAddress); - } - - /* pio or dma irq handler advances the queue. */ - if (likely(req != NULL)) - list_add_tail(&req->queue, &ep->queue); - local_irq_restore(flags); - - return 0; -} - - -/* - * nuke - dequeue ALL requests - */ -static void nuke(struct pxa2xx_ep *ep, int status) -{ - struct pxa2xx_request *req; - - /* called with irqs blocked */ - while (!list_empty(&ep->queue)) { - req = list_entry(ep->queue.next, - struct pxa2xx_request, - queue); - done(ep, req, status); - } - if (ep->desc) - pio_irq_disable (ep->bEndpointAddress); -} - - -/* dequeue JUST ONE request */ -static int pxa2xx_ep_dequeue(struct usb_ep *_ep, struct usb_request *_req) -{ - struct pxa2xx_ep *ep; - struct pxa2xx_request *req; - unsigned long flags; - - ep = container_of(_ep, struct pxa2xx_ep, ep); - if (!_ep || ep->ep.name == ep0name) - return -EINVAL; - - local_irq_save(flags); - - /* make sure it's actually queued on this endpoint */ - list_for_each_entry (req, &ep->queue, queue) { - if (&req->req == _req) - break; - } - if (&req->req != _req) { - local_irq_restore(flags); - return -EINVAL; - } - - done(ep, req, -ECONNRESET); - - local_irq_restore(flags); - return 0; -} - -/*-------------------------------------------------------------------------*/ - -static int pxa2xx_ep_set_halt(struct usb_ep *_ep, int value) -{ - struct pxa2xx_ep *ep; - unsigned long flags; - - ep = container_of(_ep, struct pxa2xx_ep, ep); - if (unlikely (!_ep - || (!ep->desc && ep->ep.name != ep0name)) - || ep->bmAttributes == USB_ENDPOINT_XFER_ISOC) { - DMSG("%s, bad ep\n", __func__); - return -EINVAL; - } - if (value == 0) { - /* this path (reset toggle+halt) is needed to implement - * SET_INTERFACE on normal hardware. but it can't be - * done from software on the PXA UDC, and the hardware - * forgets to do it as part of SET_INTERFACE automagic. - */ - DMSG("only host can clear %s halt\n", _ep->name); - return -EROFS; - } - - local_irq_save(flags); - - if ((ep->bEndpointAddress & USB_DIR_IN) != 0 - && ((*ep->reg_udccs & UDCCS_BI_TFS) == 0 - || !list_empty(&ep->queue))) { - local_irq_restore(flags); - return -EAGAIN; - } - - /* FST bit is the same for control, bulk in, bulk out, interrupt in */ - *ep->reg_udccs = UDCCS_BI_FST|UDCCS_BI_FTF; - - /* ep0 needs special care */ - if (!ep->desc) { - start_watchdog(ep->dev); - ep->dev->req_pending = 0; - ep->dev->ep0state = EP0_STALL; - - /* and bulk/intr endpoints like dropping stalls too */ - } else { - unsigned i; - for (i = 0; i < 1000; i += 20) { - if (*ep->reg_udccs & UDCCS_BI_SST) - break; - udelay(20); - } - } - local_irq_restore(flags); - - DBG(DBG_VERBOSE, "%s halt\n", _ep->name); - return 0; -} - -static int pxa2xx_ep_fifo_status(struct usb_ep *_ep) -{ - struct pxa2xx_ep *ep; - - ep = container_of(_ep, struct pxa2xx_ep, ep); - if (!_ep) { - DMSG("%s, bad ep\n", __func__); - return -ENODEV; - } - /* pxa can't report unclaimed bytes from IN fifos */ - if ((ep->bEndpointAddress & USB_DIR_IN) != 0) - return -EOPNOTSUPP; - if (ep->dev->gadget.speed == USB_SPEED_UNKNOWN - || (*ep->reg_udccs & UDCCS_BO_RFS) == 0) - return 0; - else - return (*ep->reg_ubcr & 0xfff) + 1; -} - -static void pxa2xx_ep_fifo_flush(struct usb_ep *_ep) -{ - struct pxa2xx_ep *ep; - - ep = container_of(_ep, struct pxa2xx_ep, ep); - if (!_ep || ep->ep.name == ep0name || !list_empty(&ep->queue)) { - DMSG("%s, bad ep\n", __func__); - return; - } - - /* toggle and halt bits stay unchanged */ - - /* for OUT, just read and discard the FIFO contents. */ - if ((ep->bEndpointAddress & USB_DIR_IN) == 0) { - while (((*ep->reg_udccs) & UDCCS_BO_RNE) != 0) - (void) *ep->reg_uddr; - return; - } - - /* most IN status is the same, but ISO can't stall */ - *ep->reg_udccs = UDCCS_BI_TPC|UDCCS_BI_FTF|UDCCS_BI_TUR - | (ep->bmAttributes == USB_ENDPOINT_XFER_ISOC) - ? 0 : UDCCS_BI_SST; -} - - -static struct usb_ep_ops pxa2xx_ep_ops = { - .enable = pxa2xx_ep_enable, - .disable = pxa2xx_ep_disable, - - .alloc_request = pxa2xx_ep_alloc_request, - .free_request = pxa2xx_ep_free_request, - - .queue = pxa2xx_ep_queue, - .dequeue = pxa2xx_ep_dequeue, - - .set_halt = pxa2xx_ep_set_halt, - .fifo_status = pxa2xx_ep_fifo_status, - .fifo_flush = pxa2xx_ep_fifo_flush, -}; - - -/* --------------------------------------------------------------------------- - * device-scoped parts of the api to the usb controller hardware - * --------------------------------------------------------------------------- - */ - -static int pxa2xx_udc_get_frame(struct usb_gadget *_gadget) -{ - return ((UFNRH & 0x07) << 8) | (UFNRL & 0xff); -} - -static int pxa2xx_udc_wakeup(struct usb_gadget *_gadget) -{ - /* host may not have enabled remote wakeup */ - if ((UDCCS0 & UDCCS0_DRWF) == 0) - return -EHOSTUNREACH; - udc_set_mask_UDCCR(UDCCR_RSM); - return 0; -} - -static void stop_activity(struct pxa2xx_udc *, struct usb_gadget_driver *); -static void udc_enable (struct pxa2xx_udc *); -static void udc_disable(struct pxa2xx_udc *); - -/* We disable the UDC -- and its 48 MHz clock -- whenever it's not - * in active use. - */ -static int pullup(struct pxa2xx_udc *udc) -{ - int is_active = udc->vbus && udc->pullup && !udc->suspended; - DMSG("%s\n", is_active ? "active" : "inactive"); - if (is_active) { - if (!udc->active) { - udc->active = 1; - /* Enable clock for USB device */ - clk_enable(udc->clk); - udc_enable(udc); - } - } else { - if (udc->active) { - if (udc->gadget.speed != USB_SPEED_UNKNOWN) { - DMSG("disconnect %s\n", udc->driver - ? udc->driver->driver.name - : "(no driver)"); - stop_activity(udc, udc->driver); - } - udc_disable(udc); - /* Disable clock for USB device */ - clk_disable(udc->clk); - udc->active = 0; - } - - } - return 0; -} - -/* VBUS reporting logically comes from a transceiver */ -static int pxa2xx_udc_vbus_session(struct usb_gadget *_gadget, int is_active) -{ - struct pxa2xx_udc *udc; - - udc = container_of(_gadget, struct pxa2xx_udc, gadget); - udc->vbus = (is_active != 0); - DMSG("vbus %s\n", is_active ? "supplied" : "inactive"); - pullup(udc); - return 0; -} - -/* drivers may have software control over D+ pullup */ -static int pxa2xx_udc_pullup(struct usb_gadget *_gadget, int is_active) -{ - struct pxa2xx_udc *udc; - - udc = container_of(_gadget, struct pxa2xx_udc, gadget); - - /* not all boards support pullup control */ - if (!udc->mach->gpio_pullup && !udc->mach->udc_command) - return -EOPNOTSUPP; - - udc->pullup = (is_active != 0); - pullup(udc); - return 0; -} - -static const struct usb_gadget_ops pxa2xx_udc_ops = { - .get_frame = pxa2xx_udc_get_frame, - .wakeup = pxa2xx_udc_wakeup, - .vbus_session = pxa2xx_udc_vbus_session, - .pullup = pxa2xx_udc_pullup, - - // .vbus_draw ... boards may consume current from VBUS, up to - // 100-500mA based on config. the 500uA suspend ceiling means - // that exclusively vbus-powered PXA designs violate USB specs. -}; - -/*-------------------------------------------------------------------------*/ - -#ifdef CONFIG_USB_GADGET_DEBUG_FS - -static int -udc_seq_show(struct seq_file *m, void *_d) -{ - struct pxa2xx_udc *dev = m->private; - unsigned long flags; - int i; - u32 tmp; - - local_irq_save(flags); - - /* basic device status */ - seq_printf(m, DRIVER_DESC "\n" - "%s version: %s\nGadget driver: %s\nHost %s\n\n", - driver_name, DRIVER_VERSION SIZE_STR "(pio)", - dev->driver ? dev->driver->driver.name : "(none)", - is_vbus_present() ? "full speed" : "disconnected"); - - /* registers for device and ep0 */ - seq_printf(m, - "uicr %02X.%02X, usir %02X.%02x, ufnr %02X.%02X\n", - UICR1, UICR0, USIR1, USIR0, UFNRH, UFNRL); - - tmp = UDCCR; - seq_printf(m, - "udccr %02X =%s%s%s%s%s%s%s%s\n", tmp, - (tmp & UDCCR_REM) ? " rem" : "", - (tmp & UDCCR_RSTIR) ? " rstir" : "", - (tmp & UDCCR_SRM) ? " srm" : "", - (tmp & UDCCR_SUSIR) ? " susir" : "", - (tmp & UDCCR_RESIR) ? " resir" : "", - (tmp & UDCCR_RSM) ? " rsm" : "", - (tmp & UDCCR_UDA) ? " uda" : "", - (tmp & UDCCR_UDE) ? " ude" : ""); - - tmp = UDCCS0; - seq_printf(m, - "udccs0 %02X =%s%s%s%s%s%s%s%s\n", tmp, - (tmp & UDCCS0_SA) ? " sa" : "", - (tmp & UDCCS0_RNE) ? " rne" : "", - (tmp & UDCCS0_FST) ? " fst" : "", - (tmp & UDCCS0_SST) ? " sst" : "", - (tmp & UDCCS0_DRWF) ? " dwrf" : "", - (tmp & UDCCS0_FTF) ? " ftf" : "", - (tmp & UDCCS0_IPR) ? " ipr" : "", - (tmp & UDCCS0_OPR) ? " opr" : ""); - - if (dev->has_cfr) { - tmp = UDCCFR; - seq_printf(m, - "udccfr %02X =%s%s\n", tmp, - (tmp & UDCCFR_AREN) ? " aren" : "", - (tmp & UDCCFR_ACM) ? " acm" : ""); - } - - if (!is_vbus_present() || !dev->driver) - goto done; - - seq_printf(m, "ep0 IN %lu/%lu, OUT %lu/%lu\nirqs %lu\n\n", - dev->stats.write.bytes, dev->stats.write.ops, - dev->stats.read.bytes, dev->stats.read.ops, - dev->stats.irqs); - - /* dump endpoint queues */ - for (i = 0; i < PXA_UDC_NUM_ENDPOINTS; i++) { - struct pxa2xx_ep *ep = &dev->ep [i]; - struct pxa2xx_request *req; - - if (i != 0) { - const struct usb_endpoint_descriptor *desc; - - desc = ep->desc; - if (!desc) - continue; - tmp = *dev->ep [i].reg_udccs; - seq_printf(m, - "%s max %d %s udccs %02x irqs %lu\n", - ep->ep.name, le16_to_cpu(desc->wMaxPacketSize), - "pio", tmp, ep->pio_irqs); - /* TODO translate all five groups of udccs bits! */ - - } else /* ep0 should only have one transfer queued */ - seq_printf(m, "ep0 max 16 pio irqs %lu\n", - ep->pio_irqs); - - if (list_empty(&ep->queue)) { - seq_printf(m, "\t(nothing queued)\n"); - continue; - } - list_for_each_entry(req, &ep->queue, queue) { - seq_printf(m, - "\treq %p len %d/%d buf %p\n", - &req->req, req->req.actual, - req->req.length, req->req.buf); - } - } - -done: - local_irq_restore(flags); - return 0; -} - -static int -udc_debugfs_open(struct inode *inode, struct file *file) -{ - return single_open(file, udc_seq_show, inode->i_private); -} - -static const struct file_operations debug_fops = { - .open = udc_debugfs_open, - .read = seq_read, - .llseek = seq_lseek, - .release = single_release, - .owner = THIS_MODULE, -}; - -#define create_debug_files(dev) \ - do { \ - dev->debugfs_udc = debugfs_create_file(dev->gadget.name, \ - S_IRUGO, NULL, dev, &debug_fops); \ - } while (0) -#define remove_debug_files(dev) \ - do { \ - if (dev->debugfs_udc) \ - debugfs_remove(dev->debugfs_udc); \ - } while (0) - -#else /* !CONFIG_USB_GADGET_DEBUG_FILES */ - -#define create_debug_files(dev) do {} while (0) -#define remove_debug_files(dev) do {} while (0) - -#endif /* CONFIG_USB_GADGET_DEBUG_FILES */ - -/*-------------------------------------------------------------------------*/ - -/* - * udc_disable - disable USB device controller - */ -static void udc_disable(struct pxa2xx_udc *dev) -{ - /* block all irqs */ - udc_set_mask_UDCCR(UDCCR_SRM|UDCCR_REM); - UICR0 = UICR1 = 0xff; - UFNRH = UFNRH_SIM; - - /* if hardware supports it, disconnect from usb */ - pullup_off(); - - udc_clear_mask_UDCCR(UDCCR_UDE); - - ep0_idle (dev); - dev->gadget.speed = USB_SPEED_UNKNOWN; -} - - -/* - * udc_reinit - initialize software state - */ -static void udc_reinit(struct pxa2xx_udc *dev) -{ - u32 i; - - /* device/ep0 records init */ - INIT_LIST_HEAD (&dev->gadget.ep_list); - INIT_LIST_HEAD (&dev->gadget.ep0->ep_list); - dev->ep0state = EP0_IDLE; - - /* basic endpoint records init */ - for (i = 0; i < PXA_UDC_NUM_ENDPOINTS; i++) { - struct pxa2xx_ep *ep = &dev->ep[i]; - - if (i != 0) - list_add_tail (&ep->ep.ep_list, &dev->gadget.ep_list); - - ep->desc = NULL; - ep->stopped = 0; - INIT_LIST_HEAD (&ep->queue); - ep->pio_irqs = 0; - } - - /* the rest was statically initialized, and is read-only */ -} - -/* until it's enabled, this UDC should be completely invisible - * to any USB host. - */ -static void udc_enable (struct pxa2xx_udc *dev) -{ - udc_clear_mask_UDCCR(UDCCR_UDE); - - /* try to clear these bits before we enable the udc */ - udc_ack_int_UDCCR(UDCCR_SUSIR|/*UDCCR_RSTIR|*/UDCCR_RESIR); - - ep0_idle(dev); - dev->gadget.speed = USB_SPEED_UNKNOWN; - dev->stats.irqs = 0; - - /* - * sequence taken from chapter 12.5.10, PXA250 AppProcDevManual: - * - enable UDC - * - if RESET is already in progress, ack interrupt - * - unmask reset interrupt - */ - udc_set_mask_UDCCR(UDCCR_UDE); - if (!(UDCCR & UDCCR_UDA)) - udc_ack_int_UDCCR(UDCCR_RSTIR); - - if (dev->has_cfr /* UDC_RES2 is defined */) { - /* pxa255 (a0+) can avoid a set_config race that could - * prevent gadget drivers from configuring correctly - */ - UDCCFR = UDCCFR_ACM | UDCCFR_MB1; - } else { - /* "USB test mode" for pxa250 errata 40-42 (stepping a0, a1) - * which could result in missing packets and interrupts. - * supposedly one bit per endpoint, controlling whether it - * double buffers or not; ACM/AREN bits fit into the holes. - * zero bits (like USIR0_IRx) disable double buffering. - */ - UDC_RES1 = 0x00; - UDC_RES2 = 0x00; - } - - /* enable suspend/resume and reset irqs */ - udc_clear_mask_UDCCR(UDCCR_SRM | UDCCR_REM); - - /* enable ep0 irqs */ - UICR0 &= ~UICR0_IM0; - - /* if hardware supports it, pullup D+ and wait for reset */ - pullup_on(); -} - - -/* when a driver is successfully registered, it will receive - * control requests including set_configuration(), which enables - * non-control requests. then usb traffic follows until a - * disconnect is reported. then a host may connect again, or - * the driver might get unbound. - */ -int usb_gadget_register_driver(struct usb_gadget_driver *driver) -{ - struct pxa2xx_udc *dev = the_controller; - int retval; - - if (!driver - || driver->speed < USB_SPEED_FULL - || !driver->bind - || !driver->disconnect - || !driver->setup) - return -EINVAL; - if (!dev) - return -ENODEV; - if (dev->driver) - return -EBUSY; - - /* first hook up the driver ... */ - dev->driver = driver; - dev->gadget.dev.driver = &driver->driver; - dev->pullup = 1; - - retval = device_add (&dev->gadget.dev); - if (retval) { -fail: - dev->driver = NULL; - dev->gadget.dev.driver = NULL; - return retval; - } - retval = driver->bind(&dev->gadget); - if (retval) { - DMSG("bind to driver %s --> error %d\n", - driver->driver.name, retval); - device_del (&dev->gadget.dev); - goto fail; - } - - /* ... then enable host detection and ep0; and we're ready - * for set_configuration as well as eventual disconnect. - */ - DMSG("registered gadget driver '%s'\n", driver->driver.name); - pullup(dev); - dump_state(dev); - return 0; -} -EXPORT_SYMBOL(usb_gadget_register_driver); - -static void -stop_activity(struct pxa2xx_udc *dev, struct usb_gadget_driver *driver) -{ - int i; - - /* don't disconnect drivers more than once */ - if (dev->gadget.speed == USB_SPEED_UNKNOWN) - driver = NULL; - dev->gadget.speed = USB_SPEED_UNKNOWN; - - /* prevent new request submissions, kill any outstanding requests */ - for (i = 0; i < PXA_UDC_NUM_ENDPOINTS; i++) { - struct pxa2xx_ep *ep = &dev->ep[i]; - - ep->stopped = 1; - nuke(ep, -ESHUTDOWN); - } - del_timer_sync(&dev->timer); - - /* report disconnect; the driver is already quiesced */ - if (driver) - driver->disconnect(&dev->gadget); - - /* re-init driver-visible data structures */ - udc_reinit(dev); -} - -int usb_gadget_unregister_driver(struct usb_gadget_driver *driver) -{ - struct pxa2xx_udc *dev = the_controller; - - if (!dev) - return -ENODEV; - if (!driver || driver != dev->driver || !driver->unbind) - return -EINVAL; - - local_irq_disable(); - dev->pullup = 0; - pullup(dev); - stop_activity(dev, driver); - local_irq_enable(); - - driver->unbind(&dev->gadget); - dev->gadget.dev.driver = NULL; - dev->driver = NULL; - - device_del (&dev->gadget.dev); - - DMSG("unregistered gadget driver '%s'\n", driver->driver.name); - dump_state(dev); - return 0; -} -EXPORT_SYMBOL(usb_gadget_unregister_driver); - - -/*-------------------------------------------------------------------------*/ - -#ifdef CONFIG_ARCH_LUBBOCK - -/* Lubbock has separate connect and disconnect irqs. More typical designs - * use one GPIO as the VBUS IRQ, and another to control the D+ pullup. - */ - -static irqreturn_t -lubbock_vbus_irq(int irq, void *_dev) -{ - struct pxa2xx_udc *dev = _dev; - int vbus; - - dev->stats.irqs++; - switch (irq) { - case LUBBOCK_USB_IRQ: - vbus = 1; - disable_irq(LUBBOCK_USB_IRQ); - enable_irq(LUBBOCK_USB_DISC_IRQ); - break; - case LUBBOCK_USB_DISC_IRQ: - vbus = 0; - disable_irq(LUBBOCK_USB_DISC_IRQ); - enable_irq(LUBBOCK_USB_IRQ); - break; - default: - return IRQ_NONE; - } - - pxa2xx_udc_vbus_session(&dev->gadget, vbus); - return IRQ_HANDLED; -} - -#endif - -static irqreturn_t udc_vbus_irq(int irq, void *_dev) -{ - struct pxa2xx_udc *dev = _dev; - int vbus = gpio_get_value(dev->mach->gpio_vbus); - - if (dev->mach->gpio_vbus_inverted) - vbus = !vbus; - - pxa2xx_udc_vbus_session(&dev->gadget, vbus); - return IRQ_HANDLED; -} - - -/*-------------------------------------------------------------------------*/ - -static inline void clear_ep_state (struct pxa2xx_udc *dev) -{ - unsigned i; - - /* hardware SET_{CONFIGURATION,INTERFACE} automagic resets endpoint - * fifos, and pending transactions mustn't be continued in any case. - */ - for (i = 1; i < PXA_UDC_NUM_ENDPOINTS; i++) - nuke(&dev->ep[i], -ECONNABORTED); -} - -static void udc_watchdog(unsigned long _dev) -{ - struct pxa2xx_udc *dev = (void *)_dev; - - local_irq_disable(); - if (dev->ep0state == EP0_STALL - && (UDCCS0 & UDCCS0_FST) == 0 - && (UDCCS0 & UDCCS0_SST) == 0) { - UDCCS0 = UDCCS0_FST|UDCCS0_FTF; - DBG(DBG_VERBOSE, "ep0 re-stall\n"); - start_watchdog(dev); - } - local_irq_enable(); -} - -static void handle_ep0 (struct pxa2xx_udc *dev) -{ - u32 udccs0 = UDCCS0; - struct pxa2xx_ep *ep = &dev->ep [0]; - struct pxa2xx_request *req; - union { - struct usb_ctrlrequest r; - u8 raw [8]; - u32 word [2]; - } u; - - if (list_empty(&ep->queue)) - req = NULL; - else - req = list_entry(ep->queue.next, struct pxa2xx_request, queue); - - /* clear stall status */ - if (udccs0 & UDCCS0_SST) { - nuke(ep, -EPIPE); - UDCCS0 = UDCCS0_SST; - del_timer(&dev->timer); - ep0_idle(dev); - } - - /* previous request unfinished? non-error iff back-to-back ... */ - if ((udccs0 & UDCCS0_SA) != 0 && dev->ep0state != EP0_IDLE) { - nuke(ep, 0); - del_timer(&dev->timer); - ep0_idle(dev); - } - - switch (dev->ep0state) { - case EP0_IDLE: - /* late-breaking status? */ - udccs0 = UDCCS0; - - /* start control request? */ - if (likely((udccs0 & (UDCCS0_OPR|UDCCS0_SA|UDCCS0_RNE)) - == (UDCCS0_OPR|UDCCS0_SA|UDCCS0_RNE))) { - int i; - - nuke (ep, -EPROTO); - - /* read SETUP packet */ - for (i = 0; i < 8; i++) { - if (unlikely(!(UDCCS0 & UDCCS0_RNE))) { -bad_setup: - DMSG("SETUP %d!\n", i); - goto stall; - } - u.raw [i] = (u8) UDDR0; - } - if (unlikely((UDCCS0 & UDCCS0_RNE) != 0)) - goto bad_setup; - -got_setup: - DBG(DBG_VERBOSE, "SETUP %02x.%02x v%04x i%04x l%04x\n", - u.r.bRequestType, u.r.bRequest, - le16_to_cpu(u.r.wValue), - le16_to_cpu(u.r.wIndex), - le16_to_cpu(u.r.wLength)); - - /* cope with automagic for some standard requests. */ - dev->req_std = (u.r.bRequestType & USB_TYPE_MASK) - == USB_TYPE_STANDARD; - dev->req_config = 0; - dev->req_pending = 1; - switch (u.r.bRequest) { - /* hardware restricts gadget drivers here! */ - case USB_REQ_SET_CONFIGURATION: - if (u.r.bRequestType == USB_RECIP_DEVICE) { - /* reflect hardware's automagic - * up to the gadget driver. - */ -config_change: - dev->req_config = 1; - clear_ep_state(dev); - /* if !has_cfr, there's no synch - * else use AREN (later) not SA|OPR - * USIR0_IR0 acts edge sensitive - */ - } - break; - /* ... and here, even more ... */ - case USB_REQ_SET_INTERFACE: - if (u.r.bRequestType == USB_RECIP_INTERFACE) { - /* udc hardware is broken by design: - * - altsetting may only be zero; - * - hw resets all interfaces' eps; - * - ep reset doesn't include halt(?). - */ - DMSG("broken set_interface (%d/%d)\n", - le16_to_cpu(u.r.wIndex), - le16_to_cpu(u.r.wValue)); - goto config_change; - } - break; - /* hardware was supposed to hide this */ - case USB_REQ_SET_ADDRESS: - if (u.r.bRequestType == USB_RECIP_DEVICE) { - ep0start(dev, 0, "address"); - return; - } - break; - } - - if (u.r.bRequestType & USB_DIR_IN) - dev->ep0state = EP0_IN_DATA_PHASE; - else - dev->ep0state = EP0_OUT_DATA_PHASE; - - i = dev->driver->setup(&dev->gadget, &u.r); - if (i < 0) { - /* hardware automagic preventing STALL... */ - if (dev->req_config) { - /* hardware sometimes neglects to tell - * tell us about config change events, - * so later ones may fail... - */ - WARN("config change %02x fail %d?\n", - u.r.bRequest, i); - return; - /* TODO experiment: if has_cfr, - * hardware didn't ACK; maybe we - * could actually STALL! - */ - } - DBG(DBG_VERBOSE, "protocol STALL, " - "%02x err %d\n", UDCCS0, i); -stall: - /* the watchdog timer helps deal with cases - * where udc seems to clear FST wrongly, and - * then NAKs instead of STALLing. - */ - ep0start(dev, UDCCS0_FST|UDCCS0_FTF, "stall"); - start_watchdog(dev); - dev->ep0state = EP0_STALL; - - /* deferred i/o == no response yet */ - } else if (dev->req_pending) { - if (likely(dev->ep0state == EP0_IN_DATA_PHASE - || dev->req_std || u.r.wLength)) - ep0start(dev, 0, "defer"); - else - ep0start(dev, UDCCS0_IPR, "defer/IPR"); - } - - /* expect at least one data or status stage irq */ - return; - - } else if (likely((udccs0 & (UDCCS0_OPR|UDCCS0_SA)) - == (UDCCS0_OPR|UDCCS0_SA))) { - unsigned i; - - /* pxa210/250 erratum 131 for B0/B1 says RNE lies. - * still observed on a pxa255 a0. - */ - DBG(DBG_VERBOSE, "e131\n"); - nuke(ep, -EPROTO); - - /* read SETUP data, but don't trust it too much */ - for (i = 0; i < 8; i++) - u.raw [i] = (u8) UDDR0; - if ((u.r.bRequestType & USB_RECIP_MASK) - > USB_RECIP_OTHER) - goto stall; - if (u.word [0] == 0 && u.word [1] == 0) - goto stall; - goto got_setup; - } else { - /* some random early IRQ: - * - we acked FST - * - IPR cleared - * - OPR got set, without SA (likely status stage) - */ - UDCCS0 = udccs0 & (UDCCS0_SA|UDCCS0_OPR); - } - break; - case EP0_IN_DATA_PHASE: /* GET_DESCRIPTOR etc */ - if (udccs0 & UDCCS0_OPR) { - UDCCS0 = UDCCS0_OPR|UDCCS0_FTF; - DBG(DBG_VERBOSE, "ep0in premature status\n"); - if (req) - done(ep, req, 0); - ep0_idle(dev); - } else /* irq was IPR clearing */ { - if (req) { - /* this IN packet might finish the request */ - (void) write_ep0_fifo(ep, req); - } /* else IN token before response was written */ - } - break; - case EP0_OUT_DATA_PHASE: /* SET_DESCRIPTOR etc */ - if (udccs0 & UDCCS0_OPR) { - if (req) { - /* this OUT packet might finish the request */ - if (read_ep0_fifo(ep, req)) - done(ep, req, 0); - /* else more OUT packets expected */ - } /* else OUT token before read was issued */ - } else /* irq was IPR clearing */ { - DBG(DBG_VERBOSE, "ep0out premature status\n"); - if (req) - done(ep, req, 0); - ep0_idle(dev); - } - break; - case EP0_END_XFER: - if (req) - done(ep, req, 0); - /* ack control-IN status (maybe in-zlp was skipped) - * also appears after some config change events. - */ - if (udccs0 & UDCCS0_OPR) - UDCCS0 = UDCCS0_OPR; - ep0_idle(dev); - break; - case EP0_STALL: - UDCCS0 = UDCCS0_FST; - break; - } - USIR0 = USIR0_IR0; -} - -static void handle_ep(struct pxa2xx_ep *ep) -{ - struct pxa2xx_request *req; - int is_in = ep->bEndpointAddress & USB_DIR_IN; - int completed; - u32 udccs, tmp; - - do { - completed = 0; - if (likely (!list_empty(&ep->queue))) - req = list_entry(ep->queue.next, - struct pxa2xx_request, queue); - else - req = NULL; - - // TODO check FST handling - - udccs = *ep->reg_udccs; - if (unlikely(is_in)) { /* irq from TPC, SST, or (ISO) TUR */ - tmp = UDCCS_BI_TUR; - if (likely(ep->bmAttributes == USB_ENDPOINT_XFER_BULK)) - tmp |= UDCCS_BI_SST; - tmp &= udccs; - if (likely (tmp)) - *ep->reg_udccs = tmp; - if (req && likely ((udccs & UDCCS_BI_TFS) != 0)) - completed = write_fifo(ep, req); - - } else { /* irq from RPC (or for ISO, ROF) */ - if (likely(ep->bmAttributes == USB_ENDPOINT_XFER_BULK)) - tmp = UDCCS_BO_SST | UDCCS_BO_DME; - else - tmp = UDCCS_IO_ROF | UDCCS_IO_DME; - tmp &= udccs; - if (likely(tmp)) - *ep->reg_udccs = tmp; - - /* fifos can hold packets, ready for reading... */ - if (likely(req)) { - completed = read_fifo(ep, req); - } else - pio_irq_disable (ep->bEndpointAddress); - } - ep->pio_irqs++; - } while (completed); -} - -/* - * pxa2xx_udc_irq - interrupt handler - * - * avoid delays in ep0 processing. the control handshaking isn't always - * under software control (pxa250c0 and the pxa255 are better), and delays - * could cause usb protocol errors. - */ -static irqreturn_t -pxa2xx_udc_irq(int irq, void *_dev) -{ - struct pxa2xx_udc *dev = _dev; - int handled; - - dev->stats.irqs++; - do { - u32 udccr = UDCCR; - - handled = 0; - - /* SUSpend Interrupt Request */ - if (unlikely(udccr & UDCCR_SUSIR)) { - udc_ack_int_UDCCR(UDCCR_SUSIR); - handled = 1; - DBG(DBG_VERBOSE, "USB suspend%s\n", is_vbus_present() - ? "" : "+disconnect"); - - if (!is_vbus_present()) - stop_activity(dev, dev->driver); - else if (dev->gadget.speed != USB_SPEED_UNKNOWN - && dev->driver - && dev->driver->suspend) - dev->driver->suspend(&dev->gadget); - ep0_idle (dev); - } - - /* RESume Interrupt Request */ - if (unlikely(udccr & UDCCR_RESIR)) { - udc_ack_int_UDCCR(UDCCR_RESIR); - handled = 1; - DBG(DBG_VERBOSE, "USB resume\n"); - - if (dev->gadget.speed != USB_SPEED_UNKNOWN - && dev->driver - && dev->driver->resume - && is_vbus_present()) - dev->driver->resume(&dev->gadget); - } - - /* ReSeT Interrupt Request - USB reset */ - if (unlikely(udccr & UDCCR_RSTIR)) { - udc_ack_int_UDCCR(UDCCR_RSTIR); - handled = 1; - - if ((UDCCR & UDCCR_UDA) == 0) { - DBG(DBG_VERBOSE, "USB reset start\n"); - - /* reset driver and endpoints, - * in case that's not yet done - */ - stop_activity (dev, dev->driver); - - } else { - DBG(DBG_VERBOSE, "USB reset end\n"); - dev->gadget.speed = USB_SPEED_FULL; - memset(&dev->stats, 0, sizeof dev->stats); - /* driver and endpoints are still reset */ - } - - } else { - u32 usir0 = USIR0 & ~UICR0; - u32 usir1 = USIR1 & ~UICR1; - int i; - - if (unlikely (!usir0 && !usir1)) - continue; - - DBG(DBG_VERY_NOISY, "irq %02x.%02x\n", usir1, usir0); - - /* control traffic */ - if (usir0 & USIR0_IR0) { - dev->ep[0].pio_irqs++; - handle_ep0(dev); - handled = 1; - } - - /* endpoint data transfers */ - for (i = 0; i < 8; i++) { - u32 tmp = 1 << i; - - if (i && (usir0 & tmp)) { - handle_ep(&dev->ep[i]); - USIR0 |= tmp; - handled = 1; - } - if (usir1 & tmp) { - handle_ep(&dev->ep[i+8]); - USIR1 |= tmp; - handled = 1; - } - } - } - - /* we could also ask for 1 msec SOF (SIR) interrupts */ - - } while (handled); - return IRQ_HANDLED; -} - -/*-------------------------------------------------------------------------*/ - -static void nop_release (struct device *dev) -{ - DMSG("%s %s\n", __func__, dev->bus_id); -} - -/* this uses load-time allocation and initialization (instead of - * doing it at run-time) to save code, eliminate fault paths, and - * be more obviously correct. - */ -static struct pxa2xx_udc memory = { - .gadget = { - .ops = &pxa2xx_udc_ops, - .ep0 = &memory.ep[0].ep, - .name = driver_name, - .dev = { - .bus_id = "gadget", - .release = nop_release, - }, - }, - - /* control endpoint */ - .ep[0] = { - .ep = { - .name = ep0name, - .ops = &pxa2xx_ep_ops, - .maxpacket = EP0_FIFO_SIZE, - }, - .dev = &memory, - .reg_udccs = &UDCCS0, - .reg_uddr = &UDDR0, - }, - - /* first group of endpoints */ - .ep[1] = { - .ep = { - .name = "ep1in-bulk", - .ops = &pxa2xx_ep_ops, - .maxpacket = BULK_FIFO_SIZE, - }, - .dev = &memory, - .fifo_size = BULK_FIFO_SIZE, - .bEndpointAddress = USB_DIR_IN | 1, - .bmAttributes = USB_ENDPOINT_XFER_BULK, - .reg_udccs = &UDCCS1, - .reg_uddr = &UDDR1, - }, - .ep[2] = { - .ep = { - .name = "ep2out-bulk", - .ops = &pxa2xx_ep_ops, - .maxpacket = BULK_FIFO_SIZE, - }, - .dev = &memory, - .fifo_size = BULK_FIFO_SIZE, - .bEndpointAddress = 2, - .bmAttributes = USB_ENDPOINT_XFER_BULK, - .reg_udccs = &UDCCS2, - .reg_ubcr = &UBCR2, - .reg_uddr = &UDDR2, - }, -#ifndef CONFIG_USB_PXA2XX_SMALL - .ep[3] = { - .ep = { - .name = "ep3in-iso", - .ops = &pxa2xx_ep_ops, - .maxpacket = ISO_FIFO_SIZE, - }, - .dev = &memory, - .fifo_size = ISO_FIFO_SIZE, - .bEndpointAddress = USB_DIR_IN | 3, - .bmAttributes = USB_ENDPOINT_XFER_ISOC, - .reg_udccs = &UDCCS3, - .reg_uddr = &UDDR3, - }, - .ep[4] = { - .ep = { - .name = "ep4out-iso", - .ops = &pxa2xx_ep_ops, - .maxpacket = ISO_FIFO_SIZE, - }, - .dev = &memory, - .fifo_size = ISO_FIFO_SIZE, - .bEndpointAddress = 4, - .bmAttributes = USB_ENDPOINT_XFER_ISOC, - .reg_udccs = &UDCCS4, - .reg_ubcr = &UBCR4, - .reg_uddr = &UDDR4, - }, - .ep[5] = { - .ep = { - .name = "ep5in-int", - .ops = &pxa2xx_ep_ops, - .maxpacket = INT_FIFO_SIZE, - }, - .dev = &memory, - .fifo_size = INT_FIFO_SIZE, - .bEndpointAddress = USB_DIR_IN | 5, - .bmAttributes = USB_ENDPOINT_XFER_INT, - .reg_udccs = &UDCCS5, - .reg_uddr = &UDDR5, - }, - - /* second group of endpoints */ - .ep[6] = { - .ep = { - .name = "ep6in-bulk", - .ops = &pxa2xx_ep_ops, - .maxpacket = BULK_FIFO_SIZE, - }, - .dev = &memory, - .fifo_size = BULK_FIFO_SIZE, - .bEndpointAddress = USB_DIR_IN | 6, - .bmAttributes = USB_ENDPOINT_XFER_BULK, - .reg_udccs = &UDCCS6, - .reg_uddr = &UDDR6, - }, - .ep[7] = { - .ep = { - .name = "ep7out-bulk", - .ops = &pxa2xx_ep_ops, - .maxpacket = BULK_FIFO_SIZE, - }, - .dev = &memory, - .fifo_size = BULK_FIFO_SIZE, - .bEndpointAddress = 7, - .bmAttributes = USB_ENDPOINT_XFER_BULK, - .reg_udccs = &UDCCS7, - .reg_ubcr = &UBCR7, - .reg_uddr = &UDDR7, - }, - .ep[8] = { - .ep = { - .name = "ep8in-iso", - .ops = &pxa2xx_ep_ops, - .maxpacket = ISO_FIFO_SIZE, - }, - .dev = &memory, - .fifo_size = ISO_FIFO_SIZE, - .bEndpointAddress = USB_DIR_IN | 8, - .bmAttributes = USB_ENDPOINT_XFER_ISOC, - .reg_udccs = &UDCCS8, - .reg_uddr = &UDDR8, - }, - .ep[9] = { - .ep = { - .name = "ep9out-iso", - .ops = &pxa2xx_ep_ops, - .maxpacket = ISO_FIFO_SIZE, - }, - .dev = &memory, - .fifo_size = ISO_FIFO_SIZE, - .bEndpointAddress = 9, - .bmAttributes = USB_ENDPOINT_XFER_ISOC, - .reg_udccs = &UDCCS9, - .reg_ubcr = &UBCR9, - .reg_uddr = &UDDR9, - }, - .ep[10] = { - .ep = { - .name = "ep10in-int", - .ops = &pxa2xx_ep_ops, - .maxpacket = INT_FIFO_SIZE, - }, - .dev = &memory, - .fifo_size = INT_FIFO_SIZE, - .bEndpointAddress = USB_DIR_IN | 10, - .bmAttributes = USB_ENDPOINT_XFER_INT, - .reg_udccs = &UDCCS10, - .reg_uddr = &UDDR10, - }, - - /* third group of endpoints */ - .ep[11] = { - .ep = { - .name = "ep11in-bulk", - .ops = &pxa2xx_ep_ops, - .maxpacket = BULK_FIFO_SIZE, - }, - .dev = &memory, - .fifo_size = BULK_FIFO_SIZE, - .bEndpointAddress = USB_DIR_IN | 11, - .bmAttributes = USB_ENDPOINT_XFER_BULK, - .reg_udccs = &UDCCS11, - .reg_uddr = &UDDR11, - }, - .ep[12] = { - .ep = { - .name = "ep12out-bulk", - .ops = &pxa2xx_ep_ops, - .maxpacket = BULK_FIFO_SIZE, - }, - .dev = &memory, - .fifo_size = BULK_FIFO_SIZE, - .bEndpointAddress = 12, - .bmAttributes = USB_ENDPOINT_XFER_BULK, - .reg_udccs = &UDCCS12, - .reg_ubcr = &UBCR12, - .reg_uddr = &UDDR12, - }, - .ep[13] = { - .ep = { - .name = "ep13in-iso", - .ops = &pxa2xx_ep_ops, - .maxpacket = ISO_FIFO_SIZE, - }, - .dev = &memory, - .fifo_size = ISO_FIFO_SIZE, - .bEndpointAddress = USB_DIR_IN | 13, - .bmAttributes = USB_ENDPOINT_XFER_ISOC, - .reg_udccs = &UDCCS13, - .reg_uddr = &UDDR13, - }, - .ep[14] = { - .ep = { - .name = "ep14out-iso", - .ops = &pxa2xx_ep_ops, - .maxpacket = ISO_FIFO_SIZE, - }, - .dev = &memory, - .fifo_size = ISO_FIFO_SIZE, - .bEndpointAddress = 14, - .bmAttributes = USB_ENDPOINT_XFER_ISOC, - .reg_udccs = &UDCCS14, - .reg_ubcr = &UBCR14, - .reg_uddr = &UDDR14, - }, - .ep[15] = { - .ep = { - .name = "ep15in-int", - .ops = &pxa2xx_ep_ops, - .maxpacket = INT_FIFO_SIZE, - }, - .dev = &memory, - .fifo_size = INT_FIFO_SIZE, - .bEndpointAddress = USB_DIR_IN | 15, - .bmAttributes = USB_ENDPOINT_XFER_INT, - .reg_udccs = &UDCCS15, - .reg_uddr = &UDDR15, - }, -#endif /* !CONFIG_USB_PXA2XX_SMALL */ -}; - -#define CP15R0_VENDOR_MASK 0xffffe000 - -#if defined(CONFIG_ARCH_PXA) -#define CP15R0_XSCALE_VALUE 0x69052000 /* intel/arm/xscale */ - -#elif defined(CONFIG_ARCH_IXP4XX) -#define CP15R0_XSCALE_VALUE 0x69054000 /* intel/arm/ixp4xx */ - -#endif - -#define CP15R0_PROD_MASK 0x000003f0 -#define PXA25x 0x00000100 /* and PXA26x */ -#define PXA210 0x00000120 - -#define CP15R0_REV_MASK 0x0000000f - -#define CP15R0_PRODREV_MASK (CP15R0_PROD_MASK | CP15R0_REV_MASK) - -#define PXA255_A0 0x00000106 /* or PXA260_B1 */ -#define PXA250_C0 0x00000105 /* or PXA26x_B0 */ -#define PXA250_B2 0x00000104 -#define PXA250_B1 0x00000103 /* or PXA260_A0 */ -#define PXA250_B0 0x00000102 -#define PXA250_A1 0x00000101 -#define PXA250_A0 0x00000100 - -#define PXA210_C0 0x00000125 -#define PXA210_B2 0x00000124 -#define PXA210_B1 0x00000123 -#define PXA210_B0 0x00000122 -#define IXP425_A0 0x000001c1 -#define IXP425_B0 0x000001f1 -#define IXP465_AD 0x00000200 - -/* - * probe - binds to the platform device - */ -static int __init pxa2xx_udc_probe(struct platform_device *pdev) -{ - struct pxa2xx_udc *dev = &memory; - int retval, vbus_irq, irq; - u32 chiprev; - - /* insist on Intel/ARM/XScale */ - asm("mrc%? p15, 0, %0, c0, c0" : "=r" (chiprev)); - if ((chiprev & CP15R0_VENDOR_MASK) != CP15R0_XSCALE_VALUE) { - pr_err("%s: not XScale!\n", driver_name); - return -ENODEV; - } - - /* trigger chiprev-specific logic */ - switch (chiprev & CP15R0_PRODREV_MASK) { -#if defined(CONFIG_ARCH_PXA) - case PXA255_A0: - dev->has_cfr = 1; - break; - case PXA250_A0: - case PXA250_A1: - /* A0/A1 "not released"; ep 13, 15 unusable */ - /* fall through */ - case PXA250_B2: case PXA210_B2: - case PXA250_B1: case PXA210_B1: - case PXA250_B0: case PXA210_B0: - /* OUT-DMA is broken ... */ - /* fall through */ - case PXA250_C0: case PXA210_C0: - break; -#elif defined(CONFIG_ARCH_IXP4XX) - case IXP425_A0: - case IXP425_B0: - case IXP465_AD: - dev->has_cfr = 1; - break; -#endif - default: - pr_err("%s: unrecognized processor: %08x\n", - driver_name, chiprev); - /* iop3xx, ixp4xx, ... */ - return -ENODEV; - } - - irq = platform_get_irq(pdev, 0); - if (irq < 0) - return -ENODEV; - - dev->clk = clk_get(&pdev->dev, "UDCCLK"); - if (IS_ERR(dev->clk)) { - retval = PTR_ERR(dev->clk); - goto err_clk; - } - - pr_debug("%s: IRQ %d%s%s\n", driver_name, irq, - dev->has_cfr ? "" : " (!cfr)", - SIZE_STR "(pio)" - ); - - /* other non-static parts of init */ - dev->dev = &pdev->dev; - dev->mach = pdev->dev.platform_data; - - if (dev->mach->gpio_vbus) { - if ((retval = gpio_request(dev->mach->gpio_vbus, - "pxa2xx_udc GPIO VBUS"))) { - dev_dbg(&pdev->dev, - "can't get vbus gpio %d, err: %d\n", - dev->mach->gpio_vbus, retval); - goto err_gpio_vbus; - } - gpio_direction_input(dev->mach->gpio_vbus); - vbus_irq = gpio_to_irq(dev->mach->gpio_vbus); - } else - vbus_irq = 0; - - if (dev->mach->gpio_pullup) { - if ((retval = gpio_request(dev->mach->gpio_pullup, - "pca2xx_udc GPIO PULLUP"))) { - dev_dbg(&pdev->dev, - "can't get pullup gpio %d, err: %d\n", - dev->mach->gpio_pullup, retval); - goto err_gpio_pullup; - } - gpio_direction_output(dev->mach->gpio_pullup, 0); - } - - init_timer(&dev->timer); - dev->timer.function = udc_watchdog; - dev->timer.data = (unsigned long) dev; - - device_initialize(&dev->gadget.dev); - dev->gadget.dev.parent = &pdev->dev; - dev->gadget.dev.dma_mask = pdev->dev.dma_mask; - - the_controller = dev; - platform_set_drvdata(pdev, dev); - - udc_disable(dev); - udc_reinit(dev); - - dev->vbus = is_vbus_present(); - - /* irq setup after old hardware state is cleaned up */ - retval = request_irq(irq, pxa2xx_udc_irq, - IRQF_DISABLED, driver_name, dev); - if (retval != 0) { - pr_err("%s: can't get irq %d, err %d\n", - driver_name, irq, retval); - goto err_irq1; - } - dev->got_irq = 1; - -#ifdef CONFIG_ARCH_LUBBOCK - if (machine_is_lubbock()) { - retval = request_irq(LUBBOCK_USB_DISC_IRQ, - lubbock_vbus_irq, - IRQF_DISABLED | IRQF_SAMPLE_RANDOM, - driver_name, dev); - if (retval != 0) { - pr_err("%s: can't get irq %i, err %d\n", - driver_name, LUBBOCK_USB_DISC_IRQ, retval); -lubbock_fail0: - goto err_irq_lub; - } - retval = request_irq(LUBBOCK_USB_IRQ, - lubbock_vbus_irq, - IRQF_DISABLED | IRQF_SAMPLE_RANDOM, - driver_name, dev); - if (retval != 0) { - pr_err("%s: can't get irq %i, err %d\n", - driver_name, LUBBOCK_USB_IRQ, retval); - free_irq(LUBBOCK_USB_DISC_IRQ, dev); - goto lubbock_fail0; - } - } else -#endif - if (vbus_irq) { - retval = request_irq(vbus_irq, udc_vbus_irq, - IRQF_DISABLED | IRQF_SAMPLE_RANDOM | - IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING, - driver_name, dev); - if (retval != 0) { - pr_err("%s: can't get irq %i, err %d\n", - driver_name, vbus_irq, retval); - goto err_vbus_irq; - } - } - create_debug_files(dev); - - return 0; - - err_vbus_irq: -#ifdef CONFIG_ARCH_LUBBOCK - free_irq(LUBBOCK_USB_DISC_IRQ, dev); - err_irq_lub: -#endif - free_irq(irq, dev); - err_irq1: - if (dev->mach->gpio_pullup) - gpio_free(dev->mach->gpio_pullup); - err_gpio_pullup: - if (dev->mach->gpio_vbus) - gpio_free(dev->mach->gpio_vbus); - err_gpio_vbus: - clk_put(dev->clk); - err_clk: - return retval; -} - -static void pxa2xx_udc_shutdown(struct platform_device *_dev) -{ - pullup_off(); -} - -static int __exit pxa2xx_udc_remove(struct platform_device *pdev) -{ - struct pxa2xx_udc *dev = platform_get_drvdata(pdev); - - if (dev->driver) - return -EBUSY; - - dev->pullup = 0; - pullup(dev); - - remove_debug_files(dev); - - if (dev->got_irq) { - free_irq(platform_get_irq(pdev, 0), dev); - dev->got_irq = 0; - } -#ifdef CONFIG_ARCH_LUBBOCK - if (machine_is_lubbock()) { - free_irq(LUBBOCK_USB_DISC_IRQ, dev); - free_irq(LUBBOCK_USB_IRQ, dev); - } -#endif - if (dev->mach->gpio_vbus) { - free_irq(gpio_to_irq(dev->mach->gpio_vbus), dev); - gpio_free(dev->mach->gpio_vbus); - } - if (dev->mach->gpio_pullup) - gpio_free(dev->mach->gpio_pullup); - - clk_put(dev->clk); - - platform_set_drvdata(pdev, NULL); - the_controller = NULL; - return 0; -} - -/*-------------------------------------------------------------------------*/ - -#ifdef CONFIG_PM - -/* USB suspend (controlled by the host) and system suspend (controlled - * by the PXA) don't necessarily work well together. If USB is active, - * the 48 MHz clock is required; so the system can't enter 33 MHz idle - * mode, or any deeper PM saving state. - * - * For now, we punt and forcibly disconnect from the USB host when PXA - * enters any suspend state. While we're disconnected, we always disable - * the 48MHz USB clock ... allowing PXA sleep and/or 33 MHz idle states. - * Boards without software pullup control shouldn't use those states. - * VBUS IRQs should probably be ignored so that the PXA device just acts - * "dead" to USB hosts until system resume. - */ -static int pxa2xx_udc_suspend(struct platform_device *dev, pm_message_t state) -{ - struct pxa2xx_udc *udc = platform_get_drvdata(dev); - unsigned long flags; - - if (!udc->mach->gpio_pullup && !udc->mach->udc_command) - WARN("USB host won't detect disconnect!\n"); - udc->suspended = 1; - - local_irq_save(flags); - pullup(udc); - local_irq_restore(flags); - - return 0; -} - -static int pxa2xx_udc_resume(struct platform_device *dev) -{ - struct pxa2xx_udc *udc = platform_get_drvdata(dev); - unsigned long flags; - - udc->suspended = 0; - local_irq_save(flags); - pullup(udc); - local_irq_restore(flags); - - return 0; -} - -#else -#define pxa2xx_udc_suspend NULL -#define pxa2xx_udc_resume NULL -#endif - -/*-------------------------------------------------------------------------*/ - -static struct platform_driver udc_driver = { - .shutdown = pxa2xx_udc_shutdown, - .remove = __exit_p(pxa2xx_udc_remove), - .suspend = pxa2xx_udc_suspend, - .resume = pxa2xx_udc_resume, - .driver = { - .owner = THIS_MODULE, - .name = "pxa2xx-udc", - }, -}; - -static int __init udc_init(void) -{ - pr_info("%s: version %s\n", driver_name, DRIVER_VERSION); - return platform_driver_probe(&udc_driver, pxa2xx_udc_probe); -} -module_init(udc_init); - -static void __exit udc_exit(void) -{ - platform_driver_unregister(&udc_driver); -} -module_exit(udc_exit); - -MODULE_DESCRIPTION(DRIVER_DESC); -MODULE_AUTHOR("Frank Becker, Robert Schwebel, David Brownell"); -MODULE_LICENSE("GPL"); -MODULE_ALIAS("platform:pxa2xx-udc"); diff --git a/drivers/usb/gadget/pxa2xx_udc.h b/drivers/usb/gadget/pxa2xx_udc.h deleted file mode 100644 index e2c19e8..0000000 --- a/drivers/usb/gadget/pxa2xx_udc.h +++ /dev/null @@ -1,267 +0,0 @@ -/* - * linux/drivers/usb/gadget/pxa2xx_udc.h - * Intel PXA2xx on-chip full speed USB device controller - * - * Copyright (C) 2003 Robert Schwebel , Pengutronix - * Copyright (C) 2003 David Brownell - * - * - * 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. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA - */ - -#ifndef __LINUX_USB_GADGET_PXA2XX_H -#define __LINUX_USB_GADGET_PXA2XX_H - -#include - -/*-------------------------------------------------------------------------*/ - -/* pxa2xx has this (move to include/asm-arm/arch-pxa/pxa-regs.h) */ -#define UFNRH_SIR (1 << 7) /* SOF interrupt request */ -#define UFNRH_SIM (1 << 6) /* SOF interrupt mask */ -#define UFNRH_IPE14 (1 << 5) /* ISO packet error, ep14 */ -#define UFNRH_IPE9 (1 << 4) /* ISO packet error, ep9 */ -#define UFNRH_IPE4 (1 << 3) /* ISO packet error, ep4 */ - -/* pxa255 has this (move to include/asm-arm/arch-pxa/pxa-regs.h) */ -#define UDCCFR UDC_RES2 /* UDC Control Function Register */ -#define UDCCFR_AREN (1 << 7) /* ACK response enable (now) */ -#define UDCCFR_ACM (1 << 2) /* ACK control mode (wait for AREN) */ - -/* latest pxa255 errata define new "must be one" bits in UDCCFR */ -#define UDCCFR_MB1 (0xff & ~(UDCCFR_AREN|UDCCFR_ACM)) - -/*-------------------------------------------------------------------------*/ - -struct pxa2xx_udc; - -struct pxa2xx_ep { - struct usb_ep ep; - struct pxa2xx_udc *dev; - - const struct usb_endpoint_descriptor *desc; - struct list_head queue; - unsigned long pio_irqs; - - unsigned short fifo_size; - u8 bEndpointAddress; - u8 bmAttributes; - - unsigned stopped : 1; - unsigned dma_fixup : 1; - - /* UDCCS = UDC Control/Status for this EP - * UBCR = UDC Byte Count Remaining (contents of OUT fifo) - * UDDR = UDC Endpoint Data Register (the fifo) - * DRCM = DMA Request Channel Map - */ - volatile u32 *reg_udccs; - volatile u32 *reg_ubcr; - volatile u32 *reg_uddr; -}; - -struct pxa2xx_request { - struct usb_request req; - struct list_head queue; -}; - -enum ep0_state { - EP0_IDLE, - EP0_IN_DATA_PHASE, - EP0_OUT_DATA_PHASE, - EP0_END_XFER, - EP0_STALL, -}; - -#define EP0_FIFO_SIZE ((unsigned)16) -#define BULK_FIFO_SIZE ((unsigned)64) -#define ISO_FIFO_SIZE ((unsigned)256) -#define INT_FIFO_SIZE ((unsigned)8) - -struct udc_stats { - struct ep0stats { - unsigned long ops; - unsigned long bytes; - } read, write; - unsigned long irqs; -}; - -#ifdef CONFIG_USB_PXA2XX_SMALL -/* when memory's tight, SMALL config saves code+data. */ -#define PXA_UDC_NUM_ENDPOINTS 3 -#endif - -#ifndef PXA_UDC_NUM_ENDPOINTS -#define PXA_UDC_NUM_ENDPOINTS 16 -#endif - -struct pxa2xx_udc { - struct usb_gadget gadget; - struct usb_gadget_driver *driver; - - enum ep0_state ep0state; - struct udc_stats stats; - unsigned got_irq : 1, - vbus : 1, - pullup : 1, - has_cfr : 1, - req_pending : 1, - req_std : 1, - req_config : 1, - suspended : 1, - active : 1; - -#define start_watchdog(dev) mod_timer(&dev->timer, jiffies + (HZ/200)) - struct timer_list timer; - - struct device *dev; - struct clk *clk; - struct pxa2xx_udc_mach_info *mach; - u64 dma_mask; - struct pxa2xx_ep ep [PXA_UDC_NUM_ENDPOINTS]; - -#ifdef CONFIG_USB_GADGET_DEBUG_FS - struct dentry *debugfs_udc; -#endif -}; - -/*-------------------------------------------------------------------------*/ - -#ifdef CONFIG_ARCH_LUBBOCK -#include -/* lubbock can also report usb connect/disconnect irqs */ -#endif - -static struct pxa2xx_udc *the_controller; - -/*-------------------------------------------------------------------------*/ - -/* - * Debugging support vanishes in non-debug builds. DBG_NORMAL should be - * mostly silent during normal use/testing, with no timing side-effects. - */ -#define DBG_NORMAL 1 /* error paths, device state transitions */ -#define DBG_VERBOSE 2 /* add some success path trace info */ -#define DBG_NOISY 3 /* ... even more: request level */ -#define DBG_VERY_NOISY 4 /* ... even more: packet level */ - -#define DMSG(stuff...) pr_debug("udc: " stuff) - -#ifdef DEBUG - -static int is_vbus_present(void); - -static const char *state_name[] = { - "EP0_IDLE", - "EP0_IN_DATA_PHASE", "EP0_OUT_DATA_PHASE", - "EP0_END_XFER", "EP0_STALL" -}; - -#ifdef VERBOSE_DEBUG -# define UDC_DEBUG DBG_VERBOSE -#else -# define UDC_DEBUG DBG_NORMAL -#endif - -static void __maybe_unused -dump_udccr(const char *label) -{ - u32 udccr = UDCCR; - DMSG("%s %02X =%s%s%s%s%s%s%s%s\n", - label, udccr, - (udccr & UDCCR_REM) ? " rem" : "", - (udccr & UDCCR_RSTIR) ? " rstir" : "", - (udccr & UDCCR_SRM) ? " srm" : "", - (udccr & UDCCR_SUSIR) ? " susir" : "", - (udccr & UDCCR_RESIR) ? " resir" : "", - (udccr & UDCCR_RSM) ? " rsm" : "", - (udccr & UDCCR_UDA) ? " uda" : "", - (udccr & UDCCR_UDE) ? " ude" : ""); -} - -static void __maybe_unused -dump_udccs0(const char *label) -{ - u32 udccs0 = UDCCS0; - - DMSG("%s %s %02X =%s%s%s%s%s%s%s%s\n", - label, state_name[the_controller->ep0state], udccs0, - (udccs0 & UDCCS0_SA) ? " sa" : "", - (udccs0 & UDCCS0_RNE) ? " rne" : "", - (udccs0 & UDCCS0_FST) ? " fst" : "", - (udccs0 & UDCCS0_SST) ? " sst" : "", - (udccs0 & UDCCS0_DRWF) ? " dwrf" : "", - (udccs0 & UDCCS0_FTF) ? " ftf" : "", - (udccs0 & UDCCS0_IPR) ? " ipr" : "", - (udccs0 & UDCCS0_OPR) ? " opr" : ""); -} - -static void __maybe_unused -dump_state(struct pxa2xx_udc *dev) -{ - u32 tmp; - unsigned i; - - DMSG("%s %s, uicr %02X.%02X, usir %02X.%02x, ufnr %02X.%02X\n", - is_vbus_present() ? "host " : "disconnected", - state_name[dev->ep0state], - UICR1, UICR0, USIR1, USIR0, UFNRH, UFNRL); - dump_udccr("udccr"); - if (dev->has_cfr) { - tmp = UDCCFR; - DMSG("udccfr %02X =%s%s\n", tmp, - (tmp & UDCCFR_AREN) ? " aren" : "", - (tmp & UDCCFR_ACM) ? " acm" : ""); - } - - if (!dev->driver) { - DMSG("no gadget driver bound\n"); - return; - } else - DMSG("ep0 driver '%s'\n", dev->driver->driver.name); - - if (!is_vbus_present()) - return; - - dump_udccs0 ("udccs0"); - DMSG("ep0 IN %lu/%lu, OUT %lu/%lu\n", - dev->stats.write.bytes, dev->stats.write.ops, - dev->stats.read.bytes, dev->stats.read.ops); - - for (i = 1; i < PXA_UDC_NUM_ENDPOINTS; i++) { - if (dev->ep [i].desc == NULL) - continue; - DMSG ("udccs%d = %02x\n", i, *dev->ep->reg_udccs); - } -} - -#else - -#define dump_udccr(x) do{}while(0) -#define dump_udccs0(x) do{}while(0) -#define dump_state(x) do{}while(0) - -#define UDC_DEBUG ((unsigned)0) - -#endif - -#define DBG(lvl, stuff...) do{if ((lvl) <= UDC_DEBUG) DMSG(stuff);}while(0) - -#define ERR(stuff...) pr_err("udc: " stuff) -#define WARN(stuff...) pr_warning("udc: " stuff) -#define INFO(stuff...) pr_info("udc: " stuff) - - -#endif /* __LINUX_USB_GADGET_PXA2XX_H */ -- cgit v1.1