8 files changed, 318 insertions, 12 deletions

diff --git a/drivers/usb/chipidea/Kconfig b/drivers/usb/chipidea/Kconfig
index 47e499c..1ea932a 100644
--- a/drivers/usb/chipidea/Kconfig
+++ b/drivers/usb/chipidea/Kconfig
@@ -13,7 +13,6 @@ if USB_CHIPIDEA
 config USB_CHIPIDEA_UDC
 	bool "ChipIdea device controller"
 	depends on USB_GADGET=y || USB_GADGET=USB_CHIPIDEA
-	select USB_GADGET_DUALSPEED
 	help
 	  Say Y here to enable device controller functionality of the
 	  ChipIdea driver.
diff --git a/drivers/usb/chipidea/Makefile b/drivers/usb/chipidea/Makefile
index 5c66d9c..d92ca32 100644
--- a/drivers/usb/chipidea/Makefile
+++ b/drivers/usb/chipidea/Makefile
@@ -1,3 +1,5 @@
+ccflags-$(CONFIG_USB_CHIPIDEA_DEBUG) := -DDEBUG
+
 obj-$(CONFIG_USB_CHIPIDEA)		+= ci_hdrc.o
 
 ci_hdrc-y				:= core.o
@@ -15,5 +17,5 @@ ifneq ($(CONFIG_PCI),)
 endif
 
 ifneq ($(CONFIG_OF_DEVICE),)
-	obj-$(CONFIG_USB_CHIPIDEA)	+= ci13xxx_imx.o
+	obj-$(CONFIG_USB_CHIPIDEA)	+= ci13xxx_imx.o usbmisc_imx6q.o
 endif
diff --git a/drivers/usb/chipidea/ci.h b/drivers/usb/chipidea/ci.h
index d738603..e25d126 100644
--- a/drivers/usb/chipidea/ci.h
+++ b/drivers/usb/chipidea/ci.h
@@ -139,6 +139,7 @@ struct ci13xxx {
 	enum ci_role			role;
 	bool				is_otg;
 	struct work_struct		work;
+	struct work_struct		vbus_work;
 	struct workqueue_struct		*wq;
 
 	struct dma_pool			*qh_pool;
diff --git a/drivers/usb/chipidea/ci13xxx_imx.c b/drivers/usb/chipidea/ci13xxx_imx.c
index ef60d06..0f5ca4b 100644
--- a/drivers/usb/chipidea/ci13xxx_imx.c
+++ b/drivers/usb/chipidea/ci13xxx_imx.c
@@ -20,8 +20,10 @@
 #include <linux/usb/chipidea.h>
 #include <linux/clk.h>
 #include <linux/regulator/consumer.h>
+#include <linux/pinctrl/consumer.h>
 
 #include "ci.h"
+#include "ci13xxx_imx.h"
 
 #define pdev_to_phy(pdev) \
 	((struct usb_phy *)platform_get_drvdata(pdev))
@@ -34,6 +36,55 @@ struct ci13xxx_imx_data {
 	struct regulator *reg_vbus;
 };
 
+static const struct usbmisc_ops *usbmisc_ops;
+
+/* Common functions shared by usbmisc drivers */
+
+int usbmisc_set_ops(const struct usbmisc_ops *ops)
+{
+	if (usbmisc_ops)
+		return -EBUSY;
+
+	usbmisc_ops = ops;
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(usbmisc_set_ops);
+
+void usbmisc_unset_ops(const struct usbmisc_ops *ops)
+{
+	usbmisc_ops = NULL;
+}
+EXPORT_SYMBOL_GPL(usbmisc_unset_ops);
+
+int usbmisc_get_init_data(struct device *dev, struct usbmisc_usb_device *usbdev)
+{
+	struct device_node *np = dev->of_node;
+	struct of_phandle_args args;
+	int ret;
+
+	usbdev->dev = dev;
+
+	ret = of_parse_phandle_with_args(np, "fsl,usbmisc", "#index-cells",
+					0, &args);
+	if (ret) {
+		dev_err(dev, "Failed to parse property fsl,usbmisc, errno %d\n",
+			ret);
+		memset(usbdev, 0, sizeof(*usbdev));
+		return ret;
+	}
+	usbdev->index = args.args[0];
+	of_node_put(args.np);
+
+	if (of_find_property(np, "disable-over-current", NULL))
+		usbdev->disable_oc = 1;
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(usbmisc_get_init_data);
+
+/* End of common functions shared by usbmisc drivers*/
+
 static struct ci13xxx_platform_data ci13xxx_imx_platdata __devinitdata  = {
 	.name			= "ci13xxx_imx",
 	.flags			= CI13XXX_REQUIRE_TRANSCEIVER |
@@ -49,8 +100,13 @@ static int __devinit ci13xxx_imx_probe(struct platform_device *pdev)
 	struct device_node *phy_np;
 	struct resource *res;
 	struct regulator *reg_vbus;
+	struct pinctrl *pinctrl;
 	int ret;
 
+	if (of_find_property(pdev->dev.of_node, "fsl,usbmisc", NULL)
+		&& !usbmisc_ops)
+		return -EPROBE_DEFER;
+
 	data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
 	if (!data) {
 		dev_err(&pdev->dev, "Failed to allocate CI13xxx-IMX data!\n");
@@ -63,6 +119,11 @@ static int __devinit ci13xxx_imx_probe(struct platform_device *pdev)
 		return -ENOENT;
 	}
 
+	pinctrl = devm_pinctrl_get_select_default(&pdev->dev);
+	if (IS_ERR(pinctrl))
+		dev_warn(&pdev->dev, "pinctrl get/select failed, err=%ld\n",
+			PTR_ERR(pinctrl));
+
 	data->clk = devm_clk_get(&pdev->dev, NULL);
 	if (IS_ERR(data->clk)) {
 		dev_err(&pdev->dev,
@@ -120,6 +181,16 @@ static int __devinit ci13xxx_imx_probe(struct platform_device *pdev)
 		*pdev->dev.dma_mask = DMA_BIT_MASK(32);
 		dma_set_coherent_mask(&pdev->dev, *pdev->dev.dma_mask);
 	}
+
+	if (usbmisc_ops && usbmisc_ops->init) {
+		ret = usbmisc_ops->init(&pdev->dev);
+		if (ret) {
+			dev_err(&pdev->dev,
+				"usbmisc init failed, ret=%d\n", ret);
+			goto err;
+		}
+	}
+
 	plat_ci = ci13xxx_add_device(&pdev->dev,
 				pdev->resource, pdev->num_resources,
 				&ci13xxx_imx_platdata);
diff --git a/drivers/usb/chipidea/ci13xxx_imx.h b/drivers/usb/chipidea/ci13xxx_imx.h
new file mode 100644
index 0000000..2e88acc
--- /dev/null
+++ b/drivers/usb/chipidea/ci13xxx_imx.h
@@ -0,0 +1,28 @@
+/*
+ * Copyright 2012 Freescale Semiconductor, Inc.
+ *
+ * The code contained herein is licensed under the GNU General Public
+ * License. You may obtain a copy of the GNU General Public License
+ * Version 2 or later at the following locations:
+ *
+ * http://www.opensource.org/licenses/gpl-license.html
+ * http://www.gnu.org/copyleft/gpl.html
+ */
+
+/* Used to set SoC specific callbacks */
+struct usbmisc_ops {
+	/* It's called once when probe a usb device */
+	int (*init)(struct device *dev);
+};
+
+struct usbmisc_usb_device {
+	struct device *dev; /* usb controller device */
+	int index;
+
+	int disable_oc:1; /* over current detect disabled */
+};
+
+int usbmisc_set_ops(const struct usbmisc_ops *ops);
+void usbmisc_unset_ops(const struct usbmisc_ops *ops);
+int
+usbmisc_get_init_data(struct device *dev, struct usbmisc_usb_device *usbdev);
diff --git a/drivers/usb/chipidea/core.c b/drivers/usb/chipidea/core.c
index 1083585..f69d029 100644
--- a/drivers/usb/chipidea/core.c
+++ b/drivers/usb/chipidea/core.c
@@ -273,14 +273,13 @@ static void ci_role_work(struct work_struct *work)
 	struct ci13xxx *ci = container_of(work, struct ci13xxx, work);
 	enum ci_role role = ci_otg_role(ci);
 
-	hw_write(ci, OP_OTGSC, OTGSC_IDIS, OTGSC_IDIS);
-
 	if (role != ci->role) {
 		dev_dbg(ci->dev, "switching from %s to %s\n",
 			ci_role(ci)->name, ci->roles[role]->name);
 
 		ci_role_stop(ci);
 		ci_role_start(ci, role);
+		enable_irq(ci->irq);
 	}
 }
 
@@ -320,17 +319,22 @@ static irqreturn_t ci_irq(int irq, void *data)
 {
 	struct ci13xxx *ci = data;
 	irqreturn_t ret = IRQ_NONE;
+	u32 otgsc = 0;
+
+	if (ci->is_otg)
+		otgsc = hw_read(ci, OP_OTGSC, ~0);
 
-	if (ci->is_otg) {
-		u32 sts = hw_read(ci, OP_OTGSC, ~0);
+	if (ci->role != CI_ROLE_END)
+		ret = ci_role(ci)->irq(ci);
 
-		if (sts & OTGSC_IDIS) {
-			queue_work(ci->wq, &ci->work);
-			ret = IRQ_HANDLED;
-		}
+	if (ci->is_otg && (otgsc & OTGSC_IDIS)) {
+		hw_write(ci, OP_OTGSC, OTGSC_IDIS, OTGSC_IDIS);
+		disable_irq_nosync(ci->irq);
+		queue_work(ci->wq, &ci->work);
+		ret = IRQ_HANDLED;
 	}
 
-	return ci->role == CI_ROLE_END ? ret : ci_role(ci)->irq(ci);
+	return ret;
 }
 
 static DEFINE_IDA(ci_ida);
@@ -462,6 +466,8 @@ static int __devinit ci_hdrc_probe(struct platform_device *pdev)
 
 	if (ci->roles[CI_ROLE_HOST] && ci->roles[CI_ROLE_GADGET]) {
 		ci->is_otg = true;
+		/* ID pin needs 1ms debouce time, we delay 2ms for safe */
+		mdelay(2);
 		ci->role = ci_otg_role(ci);
 	} else {
 		ci->role = ci->roles[CI_ROLE_HOST]
diff --git a/drivers/usb/chipidea/udc.c b/drivers/usb/chipidea/udc.c
index d214448..2f45bba 100644
--- a/drivers/usb/chipidea/udc.c
+++ b/drivers/usb/chipidea/udc.c
@@ -305,6 +305,18 @@ static u32 hw_test_and_clear_intr_active(struct ci13xxx *ci)
 	return reg;
 }
 
+static void hw_enable_vbus_intr(struct ci13xxx *ci)
+{
+	hw_write(ci, OP_OTGSC, OTGSC_AVVIS, OTGSC_AVVIS);
+	hw_write(ci, OP_OTGSC, OTGSC_AVVIE, OTGSC_AVVIE);
+	queue_work(ci->wq, &ci->vbus_work);
+}
+
+static void hw_disable_vbus_intr(struct ci13xxx *ci)
+{
+	hw_write(ci, OP_OTGSC, OTGSC_AVVIE, 0);
+}
+
 /**
  * hw_test_and_clear_setup_guard: test & clear setup guard (execute without
  *                                interruption)
@@ -371,6 +383,16 @@ static int hw_usb_reset(struct ci13xxx *ci)
 	return 0;
 }
 
+static void vbus_work(struct work_struct *work)
+{
+	struct ci13xxx *ci = container_of(work, struct ci13xxx, vbus_work);
+
+	if (hw_read(ci, OP_OTGSC, OTGSC_AVV))
+		usb_gadget_vbus_connect(&ci->gadget);
+	else
+		usb_gadget_vbus_disconnect(&ci->gadget);
+}
+
 /******************************************************************************
  * UTIL block
  *****************************************************************************/
@@ -1370,6 +1392,7 @@ static int ci13xxx_vbus_session(struct usb_gadget *_gadget, int is_active)
 		if (is_active) {
 			pm_runtime_get_sync(&_gadget->dev);
 			hw_device_reset(ci, USBMODE_CM_DC);
+			hw_enable_vbus_intr(ci);
 			hw_device_state(ci, ci->ep0out->qh.dma);
 		} else {
 			hw_device_state(ci, 0);
@@ -1544,8 +1567,10 @@ static int ci13xxx_start(struct usb_gadget *gadget,
 	pm_runtime_get_sync(&ci->gadget.dev);
 	if (ci->platdata->flags & CI13XXX_PULLUP_ON_VBUS) {
 		if (ci->vbus_active) {
-			if (ci->platdata->flags & CI13XXX_REGS_SHARED)
+			if (ci->platdata->flags & CI13XXX_REGS_SHARED) {
 				hw_device_reset(ci, USBMODE_CM_DC);
+				hw_enable_vbus_intr(ci);
+			}
 		} else {
 			pm_runtime_put_sync(&ci->gadget.dev);
 			goto done;
@@ -1651,6 +1676,13 @@ static irqreturn_t udc_irq(struct ci13xxx *ci)
 	} else {
 		retval = IRQ_NONE;
 	}
+
+	intr = hw_read(ci, OP_OTGSC, ~0);
+	hw_write(ci, OP_OTGSC, ~0, intr);
+
+	if (intr & (OTGSC_AVVIE & OTGSC_AVVIS))
+		queue_work(ci->wq, &ci->vbus_work);
+
 	spin_unlock(&ci->lock);
 
 	return retval;
@@ -1726,6 +1758,7 @@ static int udc_start(struct ci13xxx *ci)
 		retval = hw_device_reset(ci, USBMODE_CM_DC);
 		if (retval)
 			goto put_transceiver;
+		hw_enable_vbus_intr(ci);
 	}
 
 	retval = device_register(&ci->gadget.dev);
@@ -1788,6 +1821,9 @@ static void udc_stop(struct ci13xxx *ci)
 	if (ci == NULL)
 		return;
 
+	hw_disable_vbus_intr(ci);
+	cancel_work_sync(&ci->vbus_work);
+
 	usb_del_gadget_udc(&ci->gadget);
 
 	destroy_eps(ci);
@@ -1828,6 +1864,7 @@ int ci_hdrc_gadget_init(struct ci13xxx *ci)
 	rdrv->irq	= udc_irq;
 	rdrv->name	= "gadget";
 	ci->roles[CI_ROLE_GADGET] = rdrv;
+	INIT_WORK(&ci->vbus_work, vbus_work);
 
 	return 0;
 }
diff --git a/drivers/usb/chipidea/usbmisc_imx6q.c b/drivers/usb/chipidea/usbmisc_imx6q.c
new file mode 100644
index 0000000..416e3fc
--- /dev/null
+++ b/drivers/usb/chipidea/usbmisc_imx6q.c
@@ -0,0 +1,162 @@
+/*
+ * Copyright 2012 Freescale Semiconductor, Inc.
+ *
+ * The code contained herein is licensed under the GNU General Public
+ * License. You may obtain a copy of the GNU General Public License
+ * Version 2 or later at the following locations:
+ *
+ * http://www.opensource.org/licenses/gpl-license.html
+ * http://www.gnu.org/copyleft/gpl.html
+ */
+
+#include <linux/module.h>
+#include <linux/of_platform.h>
+#include <linux/clk.h>
+#include <linux/err.h>
+#include <linux/io.h>
+
+#include "ci13xxx_imx.h"
+
+#define USB_DEV_MAX 4
+
+#define BM_OVER_CUR_DIS		BIT(7)
+
+struct imx6q_usbmisc {
+	void __iomem *base;
+	spinlock_t lock;
+	struct clk *clk;
+	struct usbmisc_usb_device usbdev[USB_DEV_MAX];
+};
+
+static struct imx6q_usbmisc *usbmisc;
+
+static struct usbmisc_usb_device *get_usbdev(struct device *dev)
+{
+	int i, ret;
+
+	for (i = 0; i < USB_DEV_MAX; i++) {
+		if (usbmisc->usbdev[i].dev == dev)
+			return &usbmisc->usbdev[i];
+		else if (!usbmisc->usbdev[i].dev)
+			break;
+	}
+
+	if (i >= USB_DEV_MAX)
+		return ERR_PTR(-EBUSY);
+
+	ret = usbmisc_get_init_data(dev, &usbmisc->usbdev[i]);
+	if (ret)
+		return ERR_PTR(ret);
+
+	return &usbmisc->usbdev[i];
+}
+
+static int usbmisc_imx6q_init(struct device *dev)
+{
+
+	struct usbmisc_usb_device *usbdev;
+	unsigned long flags;
+	u32 reg;
+
+	usbdev = get_usbdev(dev);
+	if (IS_ERR(usbdev))
+		return PTR_ERR(usbdev);
+
+	if (usbdev->disable_oc) {
+		spin_lock_irqsave(&usbmisc->lock, flags);
+		reg = readl(usbmisc->base + usbdev->index * 4);
+		writel(reg | BM_OVER_CUR_DIS,
+			usbmisc->base + usbdev->index * 4);
+		spin_unlock_irqrestore(&usbmisc->lock, flags);
+	}
+
+	return 0;
+}
+
+static const struct usbmisc_ops imx6q_usbmisc_ops = {
+	.init = usbmisc_imx6q_init,
+};
+
+static const struct of_device_id usbmisc_imx6q_dt_ids[] = {
+	{ .compatible = "fsl,imx6q-usbmisc"},
+	{ /* sentinel */ }
+};
+
+static int __devinit usbmisc_imx6q_probe(struct platform_device *pdev)
+{
+	struct resource	*res;
+	struct imx6q_usbmisc *data;
+	int ret;
+
+	if (usbmisc)
+		return -EBUSY;
+
+	data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
+	if (!data)
+		return -ENOMEM;
+
+	spin_lock_init(&data->lock);
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	data->base = devm_request_and_ioremap(&pdev->dev, res);
+	if (!data->base)
+		return -EADDRNOTAVAIL;
+
+	data->clk = devm_clk_get(&pdev->dev, NULL);
+	if (IS_ERR(data->clk)) {
+		dev_err(&pdev->dev,
+			"failed to get clock, err=%ld\n", PTR_ERR(data->clk));
+		return PTR_ERR(data->clk);
+	}
+
+	ret = clk_prepare_enable(data->clk);
+	if (ret) {
+		dev_err(&pdev->dev,
+			"clk_prepare_enable failed, err=%d\n", ret);
+		return ret;
+	}
+
+	ret = usbmisc_set_ops(&imx6q_usbmisc_ops);
+	if (ret) {
+		clk_disable_unprepare(data->clk);
+		return ret;
+	}
+
+	usbmisc = data;
+
+	return 0;
+}
+
+static int __devexit usbmisc_imx6q_remove(struct platform_device *pdev)
+{
+	usbmisc_unset_ops(&imx6q_usbmisc_ops);
+	clk_disable_unprepare(usbmisc->clk);
+	return 0;
+}
+
+static struct platform_driver usbmisc_imx6q_driver = {
+	.probe = usbmisc_imx6q_probe,
+	.remove = __devexit_p(usbmisc_imx6q_remove),
+	.driver = {
+		.name = "usbmisc_imx6q",
+		.owner = THIS_MODULE,
+		.of_match_table = usbmisc_imx6q_dt_ids,
+	 },
+};
+
+int __init usbmisc_imx6q_drv_init(void)
+{
+	return platform_driver_register(&usbmisc_imx6q_driver);
+}
+subsys_initcall(usbmisc_imx6q_drv_init);
+
+void __exit usbmisc_imx6q_drv_exit(void)
+{
+	platform_driver_unregister(&usbmisc_imx6q_driver);
+}
+module_exit(usbmisc_imx6q_drv_exit);
+
+MODULE_ALIAS("platform:usbmisc-imx6q");
+MODULE_LICENSE("GPL v2");
+MODULE_DESCRIPTION("driver for imx6q usb non-core registers");
+MODULE_AUTHOR("Richard Zhao <richard.zhao@freescale.com>");