Merge branch 'for-next/dwc3' of git://git.kernel.org/pub/scm/linux/kernel/git/balbi/usb into usb-next

* 'for-next/dwc3' of git://git.kernel.org/pub/scm/linux/kernel/git/balbi/usb: (392 commits)
  usb: dwc3: ep0: fix for possible early delayed_status
  usb: dwc3: gadget: fix stream enable bit
  usb: dwc3: ep0: fix GetStatus handling (again)
  usb: dwc3: ep0: use dwc3_request for ep0 requsts instead of usb_request
  usb: dwc3: use correct hwparam register for power mgm check
  usb: dwc3: omap: move to module_platform_driver
  usb: dwc3: workaround: missing disconnect event
  usb: dwc3: workaround: missing USB3 Reset event
  usb: dwc3: workaround: U1/U2 -> U0 transiton
  usb: dwc3: gadget: return early in dwc3_cleanup_done_reqs()
  usb: dwc3: ep0: handle delayed_status again
  usb: dwc3: ep0: push ep0state into xfernotready processing
  usb: dwc3: fix sparse errors
  usb: dwc3: fix few coding style problems
  usb: dwc3: move generic dwc3 code from gadget into core
  usb: dwc3: use a helper function for operation mode setting
  usb: dwc3: ep0: don't use ep0in for transfers
  usb: dwc3: ep0: use proper endianess in SetFeature for wIndex
  usb: dwc3: core: drop DWC3_EVENT_BUFFERS_MAX
  usb: dwc3: omap: add multiple instances support to OMAP
  ...

34 files changed, 804 insertions, 335 deletions

diff --git a/drivers/usb/dwc3/Kconfig b/drivers/usb/dwc3/Kconfig
index 3c1d67d324f..d8f741f9e56 100644
--- a/drivers/usb/dwc3/Kconfig
+++ b/drivers/usb/dwc3/Kconfig
@@ -1,7 +1,10 @@
 config USB_DWC3
 	tristate "DesignWare USB3 DRD Core Support"
-	depends on (USB || USB_GADGET)
+	depends on (USB && USB_GADGET)
 	select USB_OTG_UTILS
+	select USB_GADGET_DUALSPEED
+	select USB_GADGET_SUPERSPEED
+	select USB_XHCI_PLATFORM
 	help
 	  Say Y or M here if your system has a Dual Role SuperSpeed
 	  USB controller based on the DesignWare USB3 IP Core.
diff --git a/drivers/usb/dwc3/Makefile b/drivers/usb/dwc3/Makefile
index 593d1dbc465..900ae74357f 100644
--- a/drivers/usb/dwc3/Makefile
+++ b/drivers/usb/dwc3/Makefile
@@ -4,10 +4,8 @@ ccflags-$(CONFIG_USB_DWC3_VERBOSE)	+= -DVERBOSE_DEBUG
 obj-$(CONFIG_USB_DWC3)			+= dwc3.o
 
 dwc3-y					:= core.o
-
-ifneq ($(CONFIG_USB_GADGET_DWC3),)
-	dwc3-y				+= gadget.o ep0.o
-endif
+dwc3-y					+= host.o
+dwc3-y					+= gadget.o ep0.o
 
 ifneq ($(CONFIG_DEBUG_FS),)
 	dwc3-y				+= debugfs.o
diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c
index 717ebc9ff94..455bb1e748d 100644
--- a/drivers/usb/dwc3/core.c
+++ b/drivers/usb/dwc3/core.c
@@ -59,6 +59,60 @@
 
 #include "debug.h"
 
+static char *maximum_speed = "super";
+module_param(maximum_speed, charp, 0);
+MODULE_PARM_DESC(maximum_speed, "Maximum supported speed.");
+
+/* -------------------------------------------------------------------------- */
+
+#define DWC3_DEVS_POSSIBLE	32
+
+static DECLARE_BITMAP(dwc3_devs, DWC3_DEVS_POSSIBLE);
+
+int dwc3_get_device_id(void)
+{
+	int		id;
+
+again:
+	id = find_first_zero_bit(dwc3_devs, DWC3_DEVS_POSSIBLE);
+	if (id < DWC3_DEVS_POSSIBLE) {
+		int old;
+
+		old = test_and_set_bit(id, dwc3_devs);
+		if (old)
+			goto again;
+	} else {
+		pr_err("dwc3: no space for new device\n");
+		id = -ENOMEM;
+	}
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(dwc3_get_device_id);
+
+void dwc3_put_device_id(int id)
+{
+	int			ret;
+
+	if (id < 0)
+		return;
+
+	ret = test_bit(id, dwc3_devs);
+	WARN(!ret, "dwc3: ID %d not in use\n", id);
+	clear_bit(id, dwc3_devs);
+}
+EXPORT_SYMBOL_GPL(dwc3_put_device_id);
+
+void dwc3_set_mode(struct dwc3 *dwc, u32 mode)
+{
+	u32 reg;
+
+	reg = dwc3_readl(dwc->regs, DWC3_GCTL);
+	reg &= ~(DWC3_GCTL_PRTCAPDIR(DWC3_GCTL_PRTCAP_OTG));
+	reg |= DWC3_GCTL_PRTCAPDIR(mode);
+	dwc3_writel(dwc->regs, DWC3_GCTL, reg);
+}
+
 /**
  * dwc3_core_soft_reset - Issues core soft reset and PHY reset
  * @dwc: pointer to our context structure
@@ -150,7 +204,7 @@ static void dwc3_free_event_buffers(struct dwc3 *dwc)
 	struct dwc3_event_buffer	*evt;
 	int i;
 
-	for (i = 0; i < DWC3_EVENT_BUFFERS_NUM; i++) {
+	for (i = 0; i < dwc->num_event_buffers; i++) {
 		evt = dwc->ev_buffs[i];
 		if (evt) {
 			dwc3_free_one_event_buffer(dwc, evt);
@@ -162,17 +216,25 @@ static void dwc3_free_event_buffers(struct dwc3 *dwc)
 /**
  * dwc3_alloc_event_buffers - Allocates @num event buffers of size @length
  * @dwc: Pointer to out controller context structure
- * @num: number of event buffers to allocate
  * @length: size of event buffer
  *
  * Returns 0 on success otherwise negative errno. In error the case, dwc
  * may contain some buffers allocated but not all which were requested.
  */
-static int __devinit dwc3_alloc_event_buffers(struct dwc3 *dwc, unsigned num,
-		unsigned length)
+static int __devinit dwc3_alloc_event_buffers(struct dwc3 *dwc, unsigned length)
 {
+	int			num;
 	int			i;
 
+	num = DWC3_NUM_INT(dwc->hwparams.hwparams1);
+	dwc->num_event_buffers = num;
+
+	dwc->ev_buffs = kzalloc(sizeof(*dwc->ev_buffs) * num, GFP_KERNEL);
+	if (!dwc->ev_buffs) {
+		dev_err(dwc->dev, "can't allocate event buffers array\n");
+		return -ENOMEM;
+	}
+
 	for (i = 0; i < num; i++) {
 		struct dwc3_event_buffer	*evt;
 
@@ -198,7 +260,7 @@ static int __devinit dwc3_event_buffers_setup(struct dwc3 *dwc)
 	struct dwc3_event_buffer	*evt;
 	int				n;
 
-	for (n = 0; n < DWC3_EVENT_BUFFERS_NUM; n++) {
+	for (n = 0; n < dwc->num_event_buffers; n++) {
 		evt = dwc->ev_buffs[n];
 		dev_dbg(dwc->dev, "Event buf %p dma %08llx length %d\n",
 				evt->buf, (unsigned long long) evt->dma,
@@ -221,7 +283,7 @@ static void dwc3_event_buffers_cleanup(struct dwc3 *dwc)
 	struct dwc3_event_buffer	*evt;
 	int				n;
 
-	for (n = 0; n < DWC3_EVENT_BUFFERS_NUM; n++) {
+	for (n = 0; n < dwc->num_event_buffers; n++) {
 		evt = dwc->ev_buffs[n];
 		dwc3_writel(dwc->regs, DWC3_GEVNTADRLO(n), 0);
 		dwc3_writel(dwc->regs, DWC3_GEVNTADRHI(n), 0);
@@ -285,8 +347,32 @@ static int __devinit dwc3_core_init(struct dwc3 *dwc)
 		cpu_relax();
 	} while (true);
 
-	ret = dwc3_alloc_event_buffers(dwc, DWC3_EVENT_BUFFERS_NUM,
-			DWC3_EVENT_BUFFERS_SIZE);
+	dwc3_cache_hwparams(dwc);
+
+	reg = dwc3_readl(dwc->regs, DWC3_GCTL);
+	reg &= ~DWC3_GCTL_SCALEDOWN(3);
+	reg &= ~DWC3_GCTL_DISSCRAMBLE;
+
+	switch (DWC3_GHWPARAMS1_EN_PWROPT(dwc->hwparams.hwparams1)) {
+	case DWC3_GHWPARAMS1_EN_PWROPT_CLK:
+		reg &= ~DWC3_GCTL_DSBLCLKGTNG;
+		break;
+	default:
+		dev_dbg(dwc->dev, "No power optimization available\n");
+	}
+
+	/*
+	 * WORKAROUND: DWC3 revisions <1.90a have a bug
+	 * when The device fails to connect at SuperSpeed
+	 * and falls back to high-speed mode which causes
+	 * the device to enter in a Connect/Disconnect loop
+	 */
+	if (dwc->revision < DWC3_REVISION_190A)
+		reg |= DWC3_GCTL_U2RSTECN;
+
+	dwc3_writel(dwc->regs, DWC3_GCTL, reg);
+
+	ret = dwc3_alloc_event_buffers(dwc, DWC3_EVENT_BUFFERS_SIZE);
 	if (ret) {
 		dev_err(dwc->dev, "failed to allocate event buffers\n");
 		ret = -ENOMEM;
@@ -299,8 +385,6 @@ static int __devinit dwc3_core_init(struct dwc3 *dwc)
 		goto err1;
 	}
 
-	dwc3_cache_hwparams(dwc);
-
 	return 0;
 
 err1:
@@ -320,15 +404,17 @@ static void dwc3_core_exit(struct dwc3 *dwc)
 
 static int __devinit dwc3_probe(struct platform_device *pdev)
 {
-	const struct platform_device_id *id = platform_get_device_id(pdev);
 	struct resource		*res;
 	struct dwc3		*dwc;
-	void __iomem		*regs;
-	unsigned int		features = id->driver_data;
+
 	int			ret = -ENOMEM;
 	int			irq;
+
+	void __iomem		*regs;
 	void			*mem;
 
+	u8			mode;
+
 	mem = kzalloc(sizeof(*dwc) + DWC3_ALIGN_MASK, GFP_KERNEL);
 	if (!mem) {
 		dev_err(&pdev->dev, "not enough memory\n");
@@ -343,6 +429,8 @@ static int __devinit dwc3_probe(struct platform_device *pdev)
 		goto err1;
 	}
 
+	dwc->res = res;
+
 	res = request_mem_region(res->start, resource_size(res),
 			dev_name(&pdev->dev));
 	if (!res) {
@@ -370,6 +458,17 @@ static int __devinit dwc3_probe(struct platform_device *pdev)
 	dwc->dev	= &pdev->dev;
 	dwc->irq	= irq;
 
+	if (!strncmp("super", maximum_speed, 5))
+		dwc->maximum_speed = DWC3_DCFG_SUPERSPEED;
+	else if (!strncmp("high", maximum_speed, 4))
+		dwc->maximum_speed = DWC3_DCFG_HIGHSPEED;
+	else if (!strncmp("full", maximum_speed, 4))
+		dwc->maximum_speed = DWC3_DCFG_FULLSPEED1;
+	else if (!strncmp("low", maximum_speed, 3))
+		dwc->maximum_speed = DWC3_DCFG_LOWSPEED;
+	else
+		dwc->maximum_speed = DWC3_DCFG_SUPERSPEED;
+
 	pm_runtime_enable(&pdev->dev);
 	pm_runtime_get_sync(&pdev->dev);
 	pm_runtime_forbid(&pdev->dev);
@@ -380,13 +479,44 @@ static int __devinit dwc3_probe(struct platform_device *pdev)
 		goto err3;
 	}
 
-	if (features & DWC3_HAS_PERIPHERAL) {
+	mode = DWC3_MODE(dwc->hwparams.hwparams0);
+
+	switch (mode) {
+	case DWC3_MODE_DEVICE:
+		dwc3_set_mode(dwc, DWC3_GCTL_PRTCAP_DEVICE);
 		ret = dwc3_gadget_init(dwc);
 		if (ret) {
-			dev_err(&pdev->dev, "failed to initialized gadget\n");
+			dev_err(&pdev->dev, "failed to initialize gadget\n");
 			goto err4;
 		}
+		break;
+	case DWC3_MODE_HOST:
+		dwc3_set_mode(dwc, DWC3_GCTL_PRTCAP_HOST);
+		ret = dwc3_host_init(dwc);
+		if (ret) {
+			dev_err(&pdev->dev, "failed to initialize host\n");
+			goto err4;
+		}
+		break;
+	case DWC3_MODE_DRD:
+		dwc3_set_mode(dwc, DWC3_GCTL_PRTCAP_OTG);
+		ret = dwc3_host_init(dwc);
+		if (ret) {
+			dev_err(&pdev->dev, "failed to initialize host\n");
+			goto err4;
+		}
+
+		ret = dwc3_gadget_init(dwc);
+		if (ret) {
+			dev_err(&pdev->dev, "failed to initialize gadget\n");
+			goto err4;
+		}
+		break;
+	default:
+		dev_err(&pdev->dev, "Unsupported mode of operation %d\n", mode);
+		goto err4;
 	}
+	dwc->mode = mode;
 
 	ret = dwc3_debugfs_init(dwc);
 	if (ret) {
@@ -399,8 +529,21 @@ static int __devinit dwc3_probe(struct platform_device *pdev)
 	return 0;
 
 err5:
-	if (features & DWC3_HAS_PERIPHERAL)
+	switch (mode) {
+	case DWC3_MODE_DEVICE:
+		dwc3_gadget_exit(dwc);
+		break;
+	case DWC3_MODE_HOST:
+		dwc3_host_exit(dwc);
+		break;
+	case DWC3_MODE_DRD:
+		dwc3_host_exit(dwc);
 		dwc3_gadget_exit(dwc);
+		break;
+	default:
+		/* do nothing */
+		break;
+	}
 
 err4:
 	dwc3_core_exit(dwc);
@@ -420,10 +563,8 @@ err0:
 
 static int __devexit dwc3_remove(struct platform_device *pdev)
 {
-	const struct platform_device_id *id = platform_get_device_id(pdev);
 	struct dwc3	*dwc = platform_get_drvdata(pdev);
 	struct resource	*res;
-	unsigned int	features = id->driver_data;
 
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 
@@ -432,8 +573,21 @@ static int __devexit dwc3_remove(struct platform_device *pdev)
 
 	dwc3_debugfs_exit(dwc);
 
-	if (features & DWC3_HAS_PERIPHERAL)
+	switch (dwc->mode) {
+	case DWC3_MODE_DEVICE:
+		dwc3_gadget_exit(dwc);
+		break;
+	case DWC3_MODE_HOST:
+		dwc3_host_exit(dwc);
+		break;
+	case DWC3_MODE_DRD:
+		dwc3_host_exit(dwc);
 		dwc3_gadget_exit(dwc);
+		break;
+	default:
+		/* do nothing */
+		break;
+	}
 
 	dwc3_core_exit(dwc);
 	release_mem_region(res->start, resource_size(res));
@@ -443,30 +597,15 @@ static int __devexit dwc3_remove(struct platform_device *pdev)
 	return 0;
 }
 
-static const struct platform_device_id dwc3_id_table[] __devinitconst = {
-	{
-		.name	= "dwc3-omap",
-		.driver_data = (DWC3_HAS_PERIPHERAL
-			| DWC3_HAS_XHCI
-			| DWC3_HAS_OTG),
-	},
-	{
-		.name	= "dwc3-pci",
-		.driver_data = DWC3_HAS_PERIPHERAL,
-	},
-	{  },	/* Terminating Entry */
-};
-MODULE_DEVICE_TABLE(platform, dwc3_id_table);
-
 static struct platform_driver dwc3_driver = {
 	.probe		= dwc3_probe,
 	.remove		= __devexit_p(dwc3_remove),
 	.driver		= {
 		.name	= "dwc3",
 	},
-	.id_table	= dwc3_id_table,
 };
 
+MODULE_ALIAS("platform:dwc3");
 MODULE_AUTHOR("Felipe Balbi <balbi@ti.com>");
 MODULE_LICENSE("Dual BSD/GPL");
 MODULE_DESCRIPTION("DesignWare USB3 DRD Controller Driver");
diff --git a/drivers/usb/dwc3/core.h b/drivers/usb/dwc3/core.h
index 29a8e1679e1..9e57f8e9bf1 100644
--- a/drivers/usb/dwc3/core.h
+++ b/drivers/usb/dwc3/core.h
@@ -41,6 +41,7 @@
 
 #include <linux/device.h>
 #include <linux/spinlock.h>
+#include <linux/ioport.h>
 #include <linux/list.h>
 #include <linux/dma-mapping.h>
 #include <linux/mm.h>
@@ -52,7 +53,6 @@
 /* Global constants */
 #define DWC3_ENDPOINTS_NUM	32
 
-#define DWC3_EVENT_BUFFERS_NUM	2
 #define DWC3_EVENT_BUFFERS_SIZE	PAGE_SIZE
 #define DWC3_EVENT_TYPE_MASK	0xfe
 
@@ -153,6 +153,7 @@
 #define DWC3_GCTL_CLK_PIPEHALF	(2)
 #define DWC3_GCTL_CLK_MASK	(3)
 
+#define DWC3_GCTL_PRTCAP(n)	(((n) & (3 << 12)) >> 12)
 #define DWC3_GCTL_PRTCAPDIR(n)	(n << 12)
 #define DWC3_GCTL_PRTCAP_HOST	1
 #define DWC3_GCTL_PRTCAP_DEVICE	2
@@ -347,6 +348,7 @@ struct dwc3_ep {
 	u32			free_slot;
 	u32			busy_slot;
 	const struct usb_endpoint_descriptor *desc;
+	const struct usb_ss_ep_comp_descriptor *comp_desc;
 	struct dwc3		*dwc;
 
 	unsigned		flags;
@@ -536,6 +538,31 @@ struct dwc3_hwparams {
 	u32	hwparams8;
 };
 
+/* HWPARAMS0 */
+#define DWC3_MODE(n)		((n) & 0x7)
+
+#define DWC3_MODE_DEVICE	0
+#define DWC3_MODE_HOST		1
+#define DWC3_MODE_DRD		2
+#define DWC3_MODE_HUB		3
+
+/* HWPARAMS1 */
+#define DWC3_NUM_INT(n)	(((n) & (0x3f << 15)) >> 15)
+
+struct dwc3_request {
+	struct usb_request	request;
+	struct list_head	list;
+	struct dwc3_ep		*dep;
+
+	u8			epnum;
+	struct dwc3_trb_hw	*trb;
+	dma_addr_t		trb_dma;
+
+	unsigned		direction:1;
+	unsigned		mapped:1;
+	unsigned		queued:1;
+};
+
 /**
  * struct dwc3 - representation of our controller
  * @ctrl_req: usb control request which is used for ep0
@@ -549,19 +576,24 @@ struct dwc3_hwparams {
  * @ep0_bounce_addr: dma address of ep0_bounce
  * @lock: for synchronizing
  * @dev: pointer to our struct device
+ * @xhci: pointer to our xHCI child
  * @event_buffer_list: a list of event buffers
  * @gadget: device side representation of the peripheral controller
  * @gadget_driver: pointer to the gadget driver
  * @regs: base address for our registers
  * @regs_size: address space size
  * @irq: IRQ number
+ * @num_event_buffers: calculated number of event buffers
+ * @u1u2: only used on revisions <1.83a for workaround
+ * @maximum_speed: maximum speed requested (mainly for testing purposes)
  * @revision: revision register contents
+ * @mode: mode of operation
  * @is_selfpowered: true when we are selfpowered
  * @three_stage_setup: set if we perform a three phase setup
- * @ep0_status_pending: ep0 status response without a req is pending
  * @ep0_bounced: true when we used bounce buffer
  * @ep0_expect_in: true when we expect a DATA IN transfer
  * @start_config_issued: true when StartConfig command has been issued
+ * @setup_packet_pending: true when there's a Setup Packet in FIFO. Workaround
  * @ep0_next_event: hold the next expected event
  * @ep0state: state of endpoint zero
  * @link_state: link state
@@ -579,12 +611,15 @@ struct dwc3 {
 	dma_addr_t		ep0_trb_addr;
 	dma_addr_t		setup_buf_addr;
 	dma_addr_t		ep0_bounce_addr;
-	struct usb_request	ep0_usb_req;
+	struct dwc3_request	ep0_usb_req;
 	/* device lock */
 	spinlock_t		lock;
 	struct device		*dev;
 
-	struct dwc3_event_buffer *ev_buffs[DWC3_EVENT_BUFFERS_NUM];
+	struct platform_device	*xhci;
+	struct resource		*res;
+
+	struct dwc3_event_buffer **ev_buffs;
 	struct dwc3_ep		*eps[DWC3_ENDPOINTS_NUM];
 
 	struct usb_gadget	gadget;
@@ -595,7 +630,11 @@ struct dwc3 {
 
 	int			irq;
 
+	u32			num_event_buffers;
+	u32			u1u2;
+	u32			maximum_speed;
 	u32			revision;
+	u32			mode;
 
 #define DWC3_REVISION_173A	0x5533173a
 #define DWC3_REVISION_175A	0x5533175a
@@ -607,10 +646,11 @@ struct dwc3 {
 
 	unsigned		is_selfpowered:1;
 	unsigned		three_stage_setup:1;
-	unsigned		ep0_status_pending:1;
 	unsigned		ep0_bounced:1;
 	unsigned		ep0_expect_in:1;
 	unsigned		start_config_issued:1;
+	unsigned		setup_packet_pending:1;
+	unsigned		delayed_status:1;
 
 	enum dwc3_ep0_next	ep0_next_event;
 	enum dwc3_ep0_state	ep0state;
@@ -765,4 +805,16 @@ union dwc3_event {
 #define DWC3_HAS_XHCI			BIT(1)
 #define DWC3_HAS_OTG			BIT(3)
 
+/* prototypes */
+void dwc3_set_mode(struct dwc3 *dwc, u32 mode);
+
+int dwc3_host_init(struct dwc3 *dwc);
+void dwc3_host_exit(struct dwc3 *dwc);
+
+int dwc3_gadget_init(struct dwc3 *dwc);
+void dwc3_gadget_exit(struct dwc3 *dwc);
+
+extern int dwc3_get_device_id(void);
+extern void dwc3_put_device_id(int id);
+
 #endif /* __DRIVERS_USB_DWC3_CORE_H */
diff --git a/drivers/usb/dwc3/debugfs.c b/drivers/usb/dwc3/debugfs.c
index da1ad77d8d5..87d403df1f3 100644
--- a/drivers/usb/dwc3/debugfs.c
+++ b/drivers/usb/dwc3/debugfs.c
@@ -44,12 +44,12 @@
 #include <linux/debugfs.h>
 #include <linux/seq_file.h>
 #include <linux/delay.h>
-
-#include <asm/uaccess.h>
+#include <linux/uaccess.h>
 
 #include "core.h"
 #include "gadget.h"
 #include "io.h"
+#include "debug.h"
 
 struct dwc3_register {
 	const char	*name;
@@ -405,6 +405,75 @@ static const struct file_operations dwc3_regdump_fops = {
 	.release		= single_release,
 };
 
+static int dwc3_mode_show(struct seq_file *s, void *unused)
+{
+	struct dwc3		*dwc = s->private;
+	unsigned long		flags;
+	u32			reg;
+
+	spin_lock_irqsave(&dwc->lock, flags);
+	reg = dwc3_readl(dwc->regs, DWC3_GCTL);
+	spin_unlock_irqrestore(&dwc->lock, flags);
+
+	switch (DWC3_GCTL_PRTCAP(reg)) {
+	case DWC3_GCTL_PRTCAP_HOST:
+		seq_printf(s, "host\n");
+		break;
+	case DWC3_GCTL_PRTCAP_DEVICE:
+		seq_printf(s, "device\n");
+		break;
+	case DWC3_GCTL_PRTCAP_OTG:
+		seq_printf(s, "OTG\n");
+		break;
+	default:
+		seq_printf(s, "UNKNOWN %08x\n", DWC3_GCTL_PRTCAP(reg));
+	}
+
+	return 0;
+}
+
+static int dwc3_mode_open(struct inode *inode, struct file *file)
+{
+	return single_open(file, dwc3_mode_show, inode->i_private);
+}
+
+static ssize_t dwc3_mode_write(struct file *file,
+		const char __user *ubuf, size_t count, loff_t *ppos)
+{
+	struct seq_file		*s = file->private_data;
+	struct dwc3		*dwc = s->private;
+	unsigned long		flags;
+	u32			mode = 0;
+	char			buf[32];
+
+	if (copy_from_user(&buf, ubuf, min_t(size_t, sizeof(buf) - 1, count)))
+		return -EFAULT;
+
+	if (!strncmp(buf, "host", 4))
+		mode |= DWC3_GCTL_PRTCAP_HOST;
+
+	if (!strncmp(buf, "device", 6))
+		mode |= DWC3_GCTL_PRTCAP_DEVICE;
+
+	if (!strncmp(buf, "otg", 3))
+		mode |= DWC3_GCTL_PRTCAP_OTG;
+
+	if (mode) {
+		spin_lock_irqsave(&dwc->lock, flags);
+		dwc3_set_mode(dwc, mode);
+		spin_unlock_irqrestore(&dwc->lock, flags);
+	}
+	return count;
+}
+
+static const struct file_operations dwc3_mode_fops = {
+	.open			= dwc3_mode_open,
+	.write			= dwc3_mode_write,
+	.read			= seq_read,
+	.llseek			= seq_lseek,
+	.release		= single_release,
+};
+
 int __devinit dwc3_debugfs_init(struct dwc3 *dwc)
 {
 	struct dentry		*root;
@@ -412,7 +481,7 @@ int __devinit dwc3_debugfs_init(struct dwc3 *dwc)
 	int			ret;
 
 	root = debugfs_create_dir(dev_name(dwc->dev), NULL);
-	if (IS_ERR(root)){
+	if (IS_ERR(root)) {
 		ret = PTR_ERR(root);
 		goto err0;
 	}
@@ -425,6 +494,14 @@ int __devinit dwc3_debugfs_init(struct dwc3 *dwc)
 		ret = PTR_ERR(file);
 		goto err1;
 	}
+
+	file = debugfs_create_file("mode", S_IRUGO | S_IWUSR, root,
+			dwc, &dwc3_mode_fops);
+	if (IS_ERR(file)) {
+		ret = PTR_ERR(file);
+		goto err1;
+	}
+
 	return 0;
 
 err1:
diff --git a/drivers/usb/dwc3/dwc3-omap.c b/drivers/usb/dwc3/dwc3-omap.c
index 4e27d5bf40a..3274ac8f120 100644
--- a/drivers/usb/dwc3/dwc3-omap.c
+++ b/drivers/usb/dwc3/dwc3-omap.c
@@ -48,6 +48,7 @@
 #include <linux/io.h>
 #include <linux/module.h>
 
+#include "core.h"
 #include "io.h"
 
 /*
@@ -200,6 +201,7 @@ static int __devinit dwc3_omap_probe(struct platform_device *pdev)
 	struct dwc3_omap	*omap;
 	struct resource		*res;
 
+	int			devid;
 	int			ret = -ENOMEM;
 	int			irq;
 
@@ -236,16 +238,20 @@ static int __devinit dwc3_omap_probe(struct platform_device *pdev)
 		goto err1;
 	}
 
-	dwc3 = platform_device_alloc("dwc3-omap", -1);
+	devid = dwc3_get_device_id();
+	if (devid < 0)
+		goto err2;
+
+	dwc3 = platform_device_alloc("dwc3", devid);
 	if (!dwc3) {
 		dev_err(&pdev->dev, "couldn't allocate dwc3 device\n");
-		goto err2;
+		goto err3;
 	}
 
 	context = kzalloc(resource_size(res), GFP_KERNEL);
 	if (!context) {
 		dev_err(&pdev->dev, "couldn't allocate dwc3 context memory\n");
-		goto err3;
+		goto err4;
 	}
 
 	spin_lock_init(&omap->lock);
@@ -299,7 +305,7 @@ static int __devinit dwc3_omap_probe(struct platform_device *pdev)
 	if (ret) {
 		dev_err(&pdev->dev, "failed to request IRQ #%d --> %d\n",
 				omap->irq, ret);
-		goto err4;
+		goto err5;
 	}
 
 	/* enable all IRQs */
@@ -322,26 +328,29 @@ static int __devinit dwc3_omap_probe(struct platform_device *pdev)
 			pdev->num_resources);
 	if (ret) {
 		dev_err(&pdev->dev, "couldn't add resources to dwc3 device\n");
-		goto err5;
+		goto err6;
 	}
 
 	ret = platform_device_add(dwc3);
 	if (ret) {
 		dev_err(&pdev->dev, "failed to register dwc3 device\n");
-		goto err5;
+		goto err6;
 	}
 
 	return 0;
 
-err5:
+err6:
 	free_irq(omap->irq, omap);
 
-err4:
+err5:
 	kfree(omap->context);
 
-err3:
+err4:
 	platform_device_put(dwc3);
 
+err3:
+	dwc3_put_device_id(devid);
+
 err2:
 	iounmap(base);
 
@@ -358,6 +367,7 @@ static int __devexit dwc3_omap_remove(struct platform_device *pdev)
 
 	platform_device_unregister(omap->dwc3);
 
+	dwc3_put_device_id(omap->dwc3->id);
 	free_irq(omap->irq, omap);
 	iounmap(omap->base);
 
@@ -386,6 +396,7 @@ static struct platform_driver dwc3_omap_driver = {
 
 module_platform_driver(dwc3_omap_driver);
 
+MODULE_ALIAS("platform:omap-dwc3");
 MODULE_AUTHOR("Felipe Balbi <balbi@ti.com>");
 MODULE_LICENSE("Dual BSD/GPL");
 MODULE_DESCRIPTION("DesignWare USB3 OMAP Glue Layer");
diff --git a/drivers/usb/dwc3/dwc3-pci.c b/drivers/usb/dwc3/dwc3-pci.c
index f77c0004268..cd1429f168c 100644
--- a/drivers/usb/dwc3/dwc3-pci.c
+++ b/drivers/usb/dwc3/dwc3-pci.c
@@ -42,52 +42,17 @@
 #include <linux/pci.h>
 #include <linux/platform_device.h>
 
+#include "core.h"
+
 /* FIXME define these in <linux/pci_ids.h> */
 #define PCI_VENDOR_ID_SYNOPSYS		0x16c3
 #define PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3	0xabcd
 
-#define DWC3_PCI_DEVS_POSSIBLE	32
-
 struct dwc3_pci {
 	struct device		*dev;
 	struct platform_device	*dwc3;
 };
 
-static DECLARE_BITMAP(dwc3_pci_devs, DWC3_PCI_DEVS_POSSIBLE);
-
-static int dwc3_pci_get_device_id(struct dwc3_pci *glue)
-{
-	int		id;
-
-again:
-	id = find_first_zero_bit(dwc3_pci_devs, DWC3_PCI_DEVS_POSSIBLE);
-	if (id < DWC3_PCI_DEVS_POSSIBLE) {
-		int old;
-
-		old = test_and_set_bit(id, dwc3_pci_devs);
-		if (old)
-			goto again;
-	} else {
-		dev_err(glue->dev, "no space for new device\n");
-		id = -ENOMEM;
-	}
-
-	return 0;
-}
-
-static void dwc3_pci_put_device_id(struct dwc3_pci *glue, int id)
-{
-	int			ret;
-
-	if (id < 0)
-		return;
-
-	ret = test_bit(id, dwc3_pci_devs);
-	WARN(!ret, "Device: %s\nID %d not in use\n",
-			dev_driver_string(glue->dev), id);
-	clear_bit(id, dwc3_pci_devs);
-}
-
 static int __devinit dwc3_pci_probe(struct pci_dev *pci,
 		const struct pci_device_id *id)
 {
@@ -114,11 +79,11 @@ static int __devinit dwc3_pci_probe(struct pci_dev *pci,
 	pci_set_power_state(pci, PCI_D0);
 	pci_set_master(pci);
 
-	devid = dwc3_pci_get_device_id(glue);
+	devid = dwc3_get_device_id();
 	if (devid < 0)
 		goto err2;
 
-	dwc3 = platform_device_alloc("dwc3-pci", devid);
+	dwc3 = platform_device_alloc("dwc3", devid);
 	if (!dwc3) {
 		dev_err(&pci->dev, "couldn't allocate dwc3 device\n");
 		goto err3;
@@ -163,7 +128,7 @@ err4:
 	platform_device_put(dwc3);
 
 err3:
-	dwc3_pci_put_device_id(glue, devid);
+	dwc3_put_device_id(devid);
 
 err2:
 	pci_disable_device(pci);
@@ -179,7 +144,7 @@ static void __devexit dwc3_pci_remove(struct pci_dev *pci)
 {
 	struct dwc3_pci	*glue = pci_get_drvdata(pci);
 
-	dwc3_pci_put_device_id(glue, glue->dwc3->id);
+	dwc3_put_device_id(glue->dwc3->id);
 	platform_device_unregister(glue->dwc3);
 	pci_set_drvdata(pci, NULL);
 	pci_disable_device(pci);
@@ -196,7 +161,7 @@ static DEFINE_PCI_DEVICE_TABLE(dwc3_pci_id_table) = {
 MODULE_DEVICE_TABLE(pci, dwc3_pci_id_table);
 
 static struct pci_driver dwc3_pci_driver = {
-	.name		= "pci-dwc3",
+	.name		= "dwc3-pci",
 	.id_table	= dwc3_pci_id_table,
 	.probe		= dwc3_pci_probe,
 	.remove		= __devexit_p(dwc3_pci_remove),
diff --git a/drivers/usb/dwc3/ep0.c b/drivers/usb/dwc3/ep0.c
index 69a4e43ddf5..2f51de57593 100644
--- a/drivers/usb/dwc3/ep0.c
+++ b/drivers/usb/dwc3/ep0.c
@@ -48,13 +48,13 @@
 
 #include <linux/usb/ch9.h>
 #include <linux/usb/gadget.h>
+#include <linux/usb/composite.h>
 
 #include "core.h"
 #include "gadget.h"
 #include "io.h"
 
-static void dwc3_ep0_inspect_setup(struct dwc3 *dwc,
-		const struct dwc3_event_depevt *event);
+static void dwc3_ep0_do_control_status(struct dwc3 *dwc, u32 epnum);
 
 static const char *dwc3_ep0_state_string(enum dwc3_ep0_state state)
 {
@@ -125,6 +125,8 @@ static int dwc3_ep0_start_trans(struct dwc3 *dwc, u8 epnum, dma_addr_t buf_dma,
 static int __dwc3_gadget_ep0_queue(struct dwc3_ep *dep,
 		struct dwc3_request *req)
 {
+	struct dwc3		*dwc = dep->dwc;
+	u32			type;
 	int			ret = 0;
 
 	req->request.actual	= 0;
@@ -143,9 +145,7 @@ static int __dwc3_gadget_ep0_queue(struct dwc3_ep *dep,
 	 * IRQ we were waiting for is long gone.
 	 */
 	if (dep->flags & DWC3_EP_PENDING_REQUEST) {
-		struct dwc3	*dwc = dep->dwc;
 		unsigned	direction;
-		u32		type;
 
 		direction = !!(dep->flags & DWC3_EP0_DIR_IN);
 
@@ -165,6 +165,13 @@ static int __dwc3_gadget_ep0_queue(struct dwc3_ep *dep,
 				req->request.dma, req->request.length, type);
 		dep->flags &= ~(DWC3_EP_PENDING_REQUEST |
 				DWC3_EP0_DIR_IN);
+	} else if (dwc->delayed_status) {
+		dwc->delayed_status = false;
+
+		if (dwc->ep0state == EP0_STATUS_PHASE)
+			dwc3_ep0_do_control_status(dwc, 1);
+		else
+			dev_dbg(dwc->dev, "too early for delayed status\n");
 	}
 
 	return ret;
@@ -190,9 +197,7 @@ int dwc3_gadget_ep0_queue(struct usb_ep *ep, struct usb_request *request,
 	}
 
 	/* we share one TRB for ep0/1 */
-	if (!list_empty(&dwc->eps[0]->request_list) ||
-			!list_empty(&dwc->eps[1]->request_list) ||
-			dwc->ep0_status_pending) {
+	if (!list_empty(&dep->request_list)) {
 		ret = -EBUSY;
 		goto out;
 	}
@@ -214,8 +219,9 @@ static void dwc3_ep0_stall_and_restart(struct dwc3 *dwc)
 	struct dwc3_ep		*dep = dwc->eps[0];
 
 	/* stall is always issued on EP0 */
-	__dwc3_gadget_ep_set_halt(dwc->eps[0], 1);
-	dwc->eps[0]->flags = DWC3_EP_ENABLED;
+	__dwc3_gadget_ep_set_halt(dep, 1);
+	dep->flags = DWC3_EP_ENABLED;
+	dwc->delayed_status = false;
 
 	if (!list_empty(&dep->request_list)) {
 		struct dwc3_request	*req;
@@ -254,17 +260,14 @@ static struct dwc3_ep *dwc3_wIndex_to_dep(struct dwc3 *dwc, __le16 wIndex_le)
 	return NULL;
 }
 
-static void dwc3_ep0_send_status_response(struct dwc3 *dwc)
+static void dwc3_ep0_status_cmpl(struct usb_ep *ep, struct usb_request *req)
 {
-	dwc3_ep0_start_trans(dwc, 1, dwc->setup_buf_addr,
-			dwc->ep0_usb_req.length,
-			DWC3_TRBCTL_CONTROL_DATA);
 }
-
 /*
  * ch 9.4.5
  */
-static int dwc3_ep0_handle_status(struct dwc3 *dwc, struct usb_ctrlrequest *ctrl)
+static int dwc3_ep0_handle_status(struct dwc3 *dwc,
+		struct usb_ctrlrequest *ctrl)
 {
 	struct dwc3_ep		*dep;
 	u32			recip;
@@ -291,7 +294,7 @@ static int dwc3_ep0_handle_status(struct dwc3 *dwc, struct usb_ctrlrequest *ctrl
 	case USB_RECIP_ENDPOINT:
 		dep = dwc3_wIndex_to_dep(dwc, ctrl->wIndex);
 		if (!dep)
-		       return -EINVAL;
+			return -EINVAL;
 
 		if (dep->flags & DWC3_EP_STALL)
 			usb_status = 1 << USB_ENDPOINT_HALT;
@@ -302,10 +305,14 @@ static int dwc3_ep0_handle_status(struct dwc3 *dwc, struct usb_ctrlrequest *ctrl
 
 	response_pkt = (__le16 *) dwc->setup_buf;
 	*response_pkt = cpu_to_le16(usb_status);
-	dwc->ep0_usb_req.length = sizeof(*response_pkt);
-	dwc->ep0_status_pending = 1;
 
-	return 0;
+	dep = dwc->eps[0];
+	dwc->ep0_usb_req.dep = dep;
+	dwc->ep0_usb_req.request.length = sizeof(*response_pkt);
+	dwc->ep0_usb_req.request.dma = dwc->setup_buf_addr;
+	dwc->ep0_usb_req.request.complete = dwc3_ep0_status_cmpl;
+
+	return __dwc3_gadget_ep0_queue(dep, &dwc->ep0_usb_req);
 }
 
 static int dwc3_ep0_handle_feature(struct dwc3 *dwc,
@@ -396,8 +403,7 @@ static int dwc3_ep0_handle_feature(struct dwc3 *dwc,
 	case USB_RECIP_ENDPOINT:
 		switch (wValue) {
 		case USB_ENDPOINT_HALT:
-
-			dep =  dwc3_wIndex_to_dep(dwc, ctrl->wIndex);
+			dep =  dwc3_wIndex_to_dep(dwc, wIndex);
 			if (!dep)
 				return -EINVAL;
 			ret = __dwc3_gadget_ep_set_halt(dep, set);
@@ -422,8 +428,15 @@ static int dwc3_ep0_set_address(struct dwc3 *dwc, struct usb_ctrlrequest *ctrl)
 	u32 reg;
 
 	addr = le16_to_cpu(ctrl->wValue);
-	if (addr > 127)
+	if (addr > 127) {
+		dev_dbg(dwc->dev, "invalid device address %d\n", addr);
 		return -EINVAL;
+	}
+
+	if (dwc->dev_state == DWC3_CONFIGURED_STATE) {
+		dev_dbg(dwc->dev, "trying to set address when configured\n");
+		return -EINVAL;
+	}
 
 	reg = dwc3_readl(dwc->regs, DWC3_DCFG);
 	reg &= ~(DWC3_DCFG_DEVADDR_MASK);
@@ -473,8 +486,10 @@ static int dwc3_ep0_set_config(struct dwc3 *dwc, struct usb_ctrlrequest *ctrl)
 		if (!cfg)
 			dwc->dev_state = DWC3_ADDRESS_STATE;
 		break;
+	default:
+		ret = -EINVAL;
 	}
-	return 0;
+	return ret;
 }
 
 static int dwc3_ep0_std_request(struct dwc3 *dwc, struct usb_ctrlrequest *ctrl)
@@ -537,6 +552,9 @@ static void dwc3_ep0_inspect_setup(struct dwc3 *dwc,
 	else
 		ret = dwc3_ep0_delegate_req(dwc, ctrl);
 
+	if (ret == USB_GADGET_DELAYED_STATUS)
+		dwc->delayed_status = true;
+
 	if (ret >= 0)
 		return;
 
@@ -550,27 +568,21 @@ static void dwc3_ep0_complete_data(struct dwc3 *dwc,
 	struct dwc3_request	*r = NULL;
 	struct usb_request	*ur;
 	struct dwc3_trb		trb;
-	struct dwc3_ep		*dep;
+	struct dwc3_ep		*ep0;
 	u32			transferred;
 	u8			epnum;
 
 	epnum = event->endpoint_number;
-	dep = dwc->eps[epnum];
+	ep0 = dwc->eps[0];
 
 	dwc->ep0_next_event = DWC3_EP0_NRDY_STATUS;
 
-	if (!dwc->ep0_status_pending) {
-		r = next_request(&dwc->eps[0]->request_list);
-		ur = &r->request;
-	} else {
-		ur = &dwc->ep0_usb_req;
-		dwc->ep0_status_pending = 0;
-	}
+	r = next_request(&ep0->request_list);
+	ur = &r->request;
 
 	dwc3_trb_to_nat(dwc->ep0_trb, &trb);
 
 	if (dwc->ep0_bounced) {
-		struct dwc3_ep	*ep0 = dwc->eps[0];
 
 		transferred = min_t(u32, ur->length,
 				ep0->endpoint.maxpacket - trb.length);
@@ -591,7 +603,7 @@ static void dwc3_ep0_complete_data(struct dwc3 *dwc,
 		 * seems to be case when req.length > maxpacket. Could it be?
 		 */
 		if (r)
-			dwc3_gadget_giveback(dep, r, 0);
+			dwc3_gadget_giveback(ep0, r, 0);
 	}
 }
 
@@ -619,6 +631,7 @@ static void dwc3_ep0_xfer_complete(struct dwc3 *dwc,
 	struct dwc3_ep		*dep = dwc->eps[event->endpoint_number];
 
 	dep->flags &= ~DWC3_EP_BUSY;
+	dwc->setup_packet_pending = false;
 
 	switch (dwc->ep0state) {
 	case EP0_SETUP_PHASE:
@@ -643,7 +656,6 @@ static void dwc3_ep0_xfer_complete(struct dwc3 *dwc,
 static void dwc3_ep0_do_control_setup(struct dwc3 *dwc,
 		const struct dwc3_event_depevt *event)
 {
-	dwc->ep0state = EP0_SETUP_PHASE;
 	dwc3_ep0_out_start(dwc);
 }
 
@@ -655,12 +667,6 @@ static void dwc3_ep0_do_control_data(struct dwc3 *dwc,
 	int			ret;
 
 	dep = dwc->eps[0];
-	dwc->ep0state = EP0_DATA_PHASE;
-
-	if (dwc->ep0_status_pending) {
-		dwc3_ep0_send_status_response(dwc);
-		return;
-	}
 
 	if (list_empty(&dep->request_list)) {
 		dev_vdbg(dwc->dev, "pending request for EP0 Data phase\n");
@@ -674,7 +680,6 @@ static void dwc3_ep0_do_control_data(struct dwc3 *dwc,
 	req = next_request(&dep->request_list);
 	req->direction = !!event->endpoint_number;
 
-	dwc->ep0state = EP0_DATA_PHASE;
 	if (req->request.length == 0) {
 		ret = dwc3_ep0_start_trans(dwc, event->endpoint_number,
 				dwc->ctrl_req_addr, 0,
@@ -706,35 +711,79 @@ static void dwc3_ep0_do_control_data(struct dwc3 *dwc,
 	WARN_ON(ret < 0);
 }
 
-static void dwc3_ep0_do_control_status(struct dwc3 *dwc,
-		const struct dwc3_event_depevt *event)
+static int dwc3_ep0_start_control_status(struct dwc3_ep *dep)
 {
+	struct dwc3		*dwc = dep->dwc;
 	u32			type;
-	int			ret;
-
-	dwc->ep0state = EP0_STATUS_PHASE;
 
 	type = dwc->three_stage_setup ? DWC3_TRBCTL_CONTROL_STATUS3
 		: DWC3_TRBCTL_CONTROL_STATUS2;
 
-	ret = dwc3_ep0_start_trans(dwc, event->endpoint_number,
+	return dwc3_ep0_start_trans(dwc, dep->number,
 			dwc->ctrl_req_addr, 0, type);
+}
 
-	WARN_ON(ret < 0);
+static void dwc3_ep0_do_control_status(struct dwc3 *dwc, u32 epnum)
+{
+	struct dwc3_ep		*dep = dwc->eps[epnum];
+
+	WARN_ON(dwc3_ep0_start_control_status(dep));
 }
 
 static void dwc3_ep0_xfernotready(struct dwc3 *dwc,
 		const struct dwc3_event_depevt *event)
 {
+	dwc->setup_packet_pending = true;
+
+	/*
+	 * This part is very tricky: If we has just handled
+	 * XferNotReady(Setup) and we're now expecting a
+	 * XferComplete but, instead, we receive another
+	 * XferNotReady(Setup), we should STALL and restart
+	 * the state machine.
+	 *
+	 * In all other cases, we just continue waiting
+	 * for the XferComplete event.
+	 *
+	 * We are a little bit unsafe here because we're
+	 * not trying to ensure that last event was, indeed,
+	 * XferNotReady(Setup).
+	 *
+	 * Still, we don't expect any condition where that
+	 * should happen and, even if it does, it would be
+	 * another error condition.
+	 */
+	if (dwc->ep0_next_event == DWC3_EP0_COMPLETE) {
+		switch (event->status) {
+		case DEPEVT_STATUS_CONTROL_SETUP:
+			dev_vdbg(dwc->dev, "Unexpected XferNotReady(Setup)\n");
+			dwc3_ep0_stall_and_restart(dwc);
+			break;
+		case DEPEVT_STATUS_CONTROL_DATA:
+			/* FALLTHROUGH */
+		case DEPEVT_STATUS_CONTROL_STATUS:
+			/* FALLTHROUGH */
+		default:
+			dev_vdbg(dwc->dev, "waiting for XferComplete\n");
+		}
+
+		return;
+	}
+
 	switch (event->status) {
 	case DEPEVT_STATUS_CONTROL_SETUP:
 		dev_vdbg(dwc->dev, "Control Setup\n");
+
+		dwc->ep0state = EP0_SETUP_PHASE;
+
 		dwc3_ep0_do_control_setup(dwc, event);
 		break;
 
 	case DEPEVT_STATUS_CONTROL_DATA:
 		dev_vdbg(dwc->dev, "Control Data\n");
 
+		dwc->ep0state = EP0_DATA_PHASE;
+
 		if (dwc->ep0_next_event != DWC3_EP0_NRDY_DATA) {
 			dev_vdbg(dwc->dev, "Expected %d got %d\n",
 					dwc->ep0_next_event,
@@ -764,6 +813,8 @@ static void dwc3_ep0_xfernotready(struct dwc3 *dwc,
 	case DEPEVT_STATUS_CONTROL_STATUS:
 		dev_vdbg(dwc->dev, "Control Status\n");
 
+		dwc->ep0state = EP0_STATUS_PHASE;
+
 		if (dwc->ep0_next_event != DWC3_EP0_NRDY_STATUS) {
 			dev_vdbg(dwc->dev, "Expected %d got %d\n",
 					dwc->ep0_next_event,
@@ -772,12 +823,19 @@ static void dwc3_ep0_xfernotready(struct dwc3 *dwc,
 			dwc3_ep0_stall_and_restart(dwc);
 			return;
 		}
-		dwc3_ep0_do_control_status(dwc, event);
+
+		if (dwc->delayed_status) {
+			WARN_ON_ONCE(event->endpoint_number != 1);
+			dev_vdbg(dwc->dev, "Mass Storage delayed status\n");
+			return;
+		}
+
+		dwc3_ep0_do_control_status(dwc, event->endpoint_number);
 	}
 }
 
 void dwc3_ep0_interrupt(struct dwc3 *dwc,
-		const const struct dwc3_event_depevt *event)
+		const struct dwc3_event_depevt *event)
 {
 	u8			epnum = event->endpoint_number;
 
diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c
index 25dbd8614e7..026c53cf164 100644
--- a/drivers/usb/dwc3/gadget.c
+++ b/drivers/usb/dwc3/gadget.c
@@ -251,7 +251,8 @@ static int dwc3_gadget_start_config(struct dwc3 *dwc, struct dwc3_ep *dep)
 }
 
 static int dwc3_gadget_set_ep_config(struct dwc3 *dwc, struct dwc3_ep *dep,
-		const struct usb_endpoint_descriptor *desc)
+		const struct usb_endpoint_descriptor *desc,
+		const struct usb_ss_ep_comp_descriptor *comp_desc)
 {
 	struct dwc3_gadget_ep_cmd_params params;
 
@@ -264,7 +265,8 @@ static int dwc3_gadget_set_ep_config(struct dwc3 *dwc, struct dwc3_ep *dep,
 	params.param1 = DWC3_DEPCFG_XFER_COMPLETE_EN
 		| DWC3_DEPCFG_XFER_NOT_READY_EN;
 
-	if (usb_endpoint_xfer_bulk(desc) && dep->endpoint.max_streams) {
+	if (comp_desc && USB_SS_MAX_STREAMS(comp_desc->bmAttributes)
+			&& usb_endpoint_xfer_bulk(desc)) {
 		params.param1 |= DWC3_DEPCFG_STREAM_CAPABLE
 			| DWC3_DEPCFG_STREAM_EVENT_EN;
 		dep->stream_capable = true;
@@ -317,7 +319,8 @@ static int dwc3_gadget_set_xfer_resource(struct dwc3 *dwc, struct dwc3_ep *dep)
  * Caller should take care of locking
  */
 static int __dwc3_gadget_ep_enable(struct dwc3_ep *dep,
-		const struct usb_endpoint_descriptor *desc)
+		const struct usb_endpoint_descriptor *desc,
+		const struct usb_ss_ep_comp_descriptor *comp_desc)
 {
 	struct dwc3		*dwc = dep->dwc;
 	u32			reg;
@@ -329,7 +332,7 @@ static int __dwc3_gadget_ep_enable(struct dwc3_ep *dep,
 			return ret;
 	}
 
-	ret = dwc3_gadget_set_ep_config(dwc, dep, desc);
+	ret = dwc3_gadget_set_ep_config(dwc, dep, desc, comp_desc);
 	if (ret)
 		return ret;
 
@@ -343,6 +346,7 @@ static int __dwc3_gadget_ep_enable(struct dwc3_ep *dep,
 			return ret;
 
 		dep->desc = desc;
+		dep->comp_desc = comp_desc;
 		dep->type = usb_endpoint_type(desc);
 		dep->flags |= DWC3_EP_ENABLED;
 
@@ -405,6 +409,7 @@ static int __dwc3_gadget_ep_disable(struct dwc3_ep *dep)
 
 	dep->stream_capable = false;
 	dep->desc = NULL;
+	dep->comp_desc = NULL;
 	dep->type = 0;
 	dep->flags = 0;
 
@@ -473,7 +478,7 @@ static int dwc3_gadget_ep_enable(struct usb_ep *ep,
 	dev_vdbg(dwc->dev, "Enabling %s\n", dep->name);
 
 	spin_lock_irqsave(&dwc->lock, flags);
-	ret = __dwc3_gadget_ep_enable(dep, desc);
+	ret = __dwc3_gadget_ep_enable(dep, desc, ep->comp_desc);
 	spin_unlock_irqrestore(&dwc->lock, flags);
 
 	return ret;
@@ -745,8 +750,9 @@ static int __dwc3_gadget_kick_transfer(struct dwc3_ep *dep, u16 cmd_param,
 	dep->flags |= DWC3_EP_BUSY;
 	dep->res_trans_idx = dwc3_gadget_ep_get_transfer_index(dwc,
 			dep->number);
-	if (!dep->res_trans_idx)
-		printk_once(KERN_ERR "%s() res_trans_idx is invalid\n", __func__);
+
+	WARN_ON_ONCE(!dep->res_trans_idx);
+
 	return 0;
 }
 
@@ -1155,35 +1161,9 @@ static int dwc3_gadget_start(struct usb_gadget *g,
 	dwc->gadget_driver	= driver;
 	dwc->gadget.dev.driver	= &driver->driver;
 
-	reg = dwc3_readl(dwc->regs, DWC3_GCTL);
-
-	reg &= ~DWC3_GCTL_SCALEDOWN(3);
-	reg &= ~DWC3_GCTL_PRTCAPDIR(DWC3_GCTL_PRTCAP_OTG);
-	reg &= ~DWC3_GCTL_DISSCRAMBLE;
-	reg |= DWC3_GCTL_PRTCAPDIR(DWC3_GCTL_PRTCAP_DEVICE);
-
-	switch (DWC3_GHWPARAMS1_EN_PWROPT(dwc->hwparams.hwparams0)) {
-	case DWC3_GHWPARAMS1_EN_PWROPT_CLK:
-		reg &= ~DWC3_GCTL_DSBLCLKGTNG;
-		break;
-	default:
-		dev_dbg(dwc->dev, "No power optimization available\n");
-	}
-
-	/*
-	 * WORKAROUND: DWC3 revisions <1.90a have a bug
-	 * when The device fails to connect at SuperSpeed
-	 * and falls back to high-speed mode which causes
-	 * the device to enter in a Connect/Disconnect loop
-	 */
-	if (dwc->revision < DWC3_REVISION_190A)
-		reg |= DWC3_GCTL_U2RSTECN;
-
-	dwc3_writel(dwc->regs, DWC3_GCTL, reg);
-
 	reg = dwc3_readl(dwc->regs, DWC3_DCFG);
 	reg &= ~(DWC3_DCFG_SPEED_MASK);
-	reg |= DWC3_DCFG_SUPERSPEED;
+	reg |= dwc->maximum_speed;
 	dwc3_writel(dwc->regs, DWC3_DCFG, reg);
 
 	dwc->start_config_issued = false;
@@ -1192,14 +1172,14 @@ static int dwc3_gadget_start(struct usb_gadget *g,
 	dwc3_gadget_ep0_desc.wMaxPacketSize = cpu_to_le16(512);
 
 	dep = dwc->eps[0];
-	ret = __dwc3_gadget_ep_enable(dep, &dwc3_gadget_ep0_desc);
+	ret = __dwc3_gadget_ep_enable(dep, &dwc3_gadget_ep0_desc, NULL);
 	if (ret) {
 		dev_err(dwc->dev, "failed to enable %s\n", dep->name);
 		goto err0;
 	}
 
 	dep = dwc->eps[1];
-	ret = __dwc3_gadget_ep_enable(dep, &dwc3_gadget_ep0_desc);
+	ret = __dwc3_gadget_ep_enable(dep, &dwc3_gadget_ep0_desc, NULL);
 	if (ret) {
 		dev_err(dwc->dev, "failed to enable %s\n", dep->name);
 		goto err1;
@@ -1290,11 +1270,10 @@ static int __devinit dwc3_gadget_init_endpoints(struct dwc3 *dwc)
 					&dwc->gadget.ep_list);
 
 			ret = dwc3_alloc_trb_pool(dep);
-			if (ret) {
-				dev_err(dwc->dev, "%s: failed to allocate TRB pool\n", dep->name);
+			if (ret)
 				return ret;
-			}
 		}
+
 		INIT_LIST_HEAD(&dep->request_list);
 		INIT_LIST_HEAD(&dep->req_queued);
 	}
@@ -1334,8 +1313,10 @@ static int dwc3_cleanup_done_reqs(struct dwc3 *dwc, struct dwc3_ep *dep,
 
 	do {
 		req = next_request(&dep->req_queued);
-		if (!req)
-			break;
+		if (!req) {
+			WARN_ON_ONCE(1);
+			return 1;
+		}
 
 		dwc3_trb_to_nat(req->trb, &trb);
 
@@ -1400,6 +1381,31 @@ static void dwc3_endpoint_transfer_complete(struct dwc3 *dwc,
 		dep->flags &= ~DWC3_EP_BUSY;
 		dep->res_trans_idx = 0;
 	}
+
+	/*
+	 * WORKAROUND: This is the 2nd half of U1/U2 -> U0 workaround.
+	 * See dwc3_gadget_linksts_change_interrupt() for 1st half.
+	 */
+	if (dwc->revision < DWC3_REVISION_183A) {
+		u32		reg;
+		int		i;
+
+		for (i = 0; i < DWC3_ENDPOINTS_NUM; i++) {
+			struct dwc3_ep	*dep = dwc->eps[i];
+
+			if (!(dep->flags & DWC3_EP_ENABLED))
+				continue;
+
+			if (!list_empty(&dep->req_queued))
+				return;
+		}
+
+		reg = dwc3_readl(dwc->regs, DWC3_DCTL);
+		reg |= dwc->u1u2;
+		dwc3_writel(dwc->regs, DWC3_DCTL, reg);
+
+		dwc->u1u2 = 0;
+	}
 }
 
 static void dwc3_gadget_start_isoc(struct dwc3 *dwc,
@@ -1639,6 +1645,7 @@ static void dwc3_gadget_disconnect_interrupt(struct dwc3 *dwc)
 	dwc->start_config_issued = false;
 
 	dwc->gadget.speed = USB_SPEED_UNKNOWN;
+	dwc->setup_packet_pending = false;
 }
 
 static void dwc3_gadget_usb3_phy_power(struct dwc3 *dwc, int on)
@@ -1675,6 +1682,37 @@ static void dwc3_gadget_reset_interrupt(struct dwc3 *dwc)
 
 	dev_vdbg(dwc->dev, "%s\n", __func__);
 
+	/*
+	 * WORKAROUND: DWC3 revisions <1.88a have an issue which
+	 * would cause a missing Disconnect Event if there's a
+	 * pending Setup Packet in the FIFO.
+	 *
+	 * There's no suggested workaround on the official Bug
+	 * report, which states that "unless the driver/application
+	 * is doing any special handling of a disconnect event,
+	 * there is no functional issue".
+	 *
+	 * Unfortunately, it turns out that we _do_ some special
+	 * handling of a disconnect event, namely complete all
+	 * pending transfers, notify gadget driver of the
+	 * disconnection, and so on.
+	 *
+	 * Our suggested workaround is to follow the Disconnect
+	 * Event steps here, instead, based on a setup_packet_pending
+	 * flag. Such flag gets set whenever we have a XferNotReady
+	 * event on EP0 and gets cleared on XferComplete for the
+	 * same endpoint.
+	 *
+	 * Refers to:
+	 *
+	 * STAR#9000466709: RTL: Device : Disconnect event not
+	 * generated if setup packet pending in FIFO
+	 */
+	if (dwc->revision < DWC3_REVISION_188A) {
+		if (dwc->setup_packet_pending)
+			dwc3_gadget_disconnect_interrupt(dwc);
+	}
+
 	/* Enable PHYs */
 	dwc3_gadget_usb2_phy_power(dwc, true);
 	dwc3_gadget_usb3_phy_power(dwc, true);
@@ -1755,6 +1793,22 @@ static void dwc3_gadget_conndone_interrupt(struct dwc3 *dwc)
 
 	switch (speed) {
 	case DWC3_DCFG_SUPERSPEED:
+		/*
+		 * WORKAROUND: DWC3 revisions <1.90a have an issue which
+		 * would cause a missing USB3 Reset event.
+		 *
+		 * In such situations, we should force a USB3 Reset
+		 * event by calling our dwc3_gadget_reset_interrupt()
+		 * routine.
+		 *
+		 * Refers to:
+		 *
+		 * STAR#9000483510: RTL: SS : USB3 reset event may
+		 * not be generated always when the link enters poll
+		 */
+		if (dwc->revision < DWC3_REVISION_190A)
+			dwc3_gadget_reset_interrupt(dwc);
+
 		dwc3_gadget_ep0_desc.wMaxPacketSize = cpu_to_le16(512);
 		dwc->gadget.ep0->maxpacket = 512;
 		dwc->gadget.speed = USB_SPEED_SUPER;
@@ -1781,14 +1835,14 @@ static void dwc3_gadget_conndone_interrupt(struct dwc3 *dwc)
 	dwc3_gadget_disable_phy(dwc, dwc->gadget.speed);
 
 	dep = dwc->eps[0];
-	ret = __dwc3_gadget_ep_enable(dep, &dwc3_gadget_ep0_desc);
+	ret = __dwc3_gadget_ep_enable(dep, &dwc3_gadget_ep0_desc, NULL);
 	if (ret) {
 		dev_err(dwc->dev, "failed to enable %s\n", dep->name);
 		return;
 	}
 
 	dep = dwc->eps[1];
-	ret = __dwc3_gadget_ep_enable(dep, &dwc3_gadget_ep0_desc);
+	ret = __dwc3_gadget_ep_enable(dep, &dwc3_gadget_ep0_desc, NULL);
 	if (ret) {
 		dev_err(dwc->dev, "failed to enable %s\n", dep->name);
 		return;
@@ -1818,8 +1872,55 @@ static void dwc3_gadget_wakeup_interrupt(struct dwc3 *dwc)
 static void dwc3_gadget_linksts_change_interrupt(struct dwc3 *dwc,
 		unsigned int evtinfo)
 {
-	/*  The fith bit says SuperSpeed yes or no. */
-	dwc->link_state = evtinfo & DWC3_LINK_STATE_MASK;
+	enum dwc3_link_state	next = evtinfo & DWC3_LINK_STATE_MASK;
+
+	/*
+	 * WORKAROUND: DWC3 Revisions <1.83a have an issue which, depending
+	 * on the link partner, the USB session might do multiple entry/exit
+	 * of low power states before a transfer takes place.
+	 *
+	 * Due to this problem, we might experience lower throughput. The
+	 * suggested workaround is to disable DCTL[12:9] bits if we're
+	 * transitioning from U1/U2 to U0 and enable those bits again
+	 * after a transfer completes and there are no pending transfers
+	 * on any of the enabled endpoints.
+	 *
+	 * This is the first half of that workaround.
+	 *
+	 * Refers to:
+	 *
+	 * STAR#9000446952: RTL: Device SS : if U1/U2 ->U0 takes >128us
+	 * core send LGO_Ux entering U0
+	 */
+	if (dwc->revision < DWC3_REVISION_183A) {
+		if (next == DWC3_LINK_STATE_U0) {
+			u32	u1u2;
+			u32	reg;
+
+			switch (dwc->link_state) {
+			case DWC3_LINK_STATE_U1:
+			case DWC3_LINK_STATE_U2:
+				reg = dwc3_readl(dwc->regs, DWC3_DCTL);
+				u1u2 = reg & (DWC3_DCTL_INITU2ENA
+						| DWC3_DCTL_ACCEPTU2ENA
+						| DWC3_DCTL_INITU1ENA
+						| DWC3_DCTL_ACCEPTU1ENA);
+
+				if (!dwc->u1u2)
+					dwc->u1u2 = reg & u1u2;
+
+				reg &= ~u1u2;
+
+				dwc3_writel(dwc->regs, DWC3_DCTL, reg);
+				break;
+			default:
+				/* do nothing */
+				break;
+			}
+		}
+	}
+
+	dwc->link_state = next;
 
 	dev_vdbg(dwc->dev, "%s link %d\n", __func__, dwc->link_state);
 }
@@ -1925,7 +2026,7 @@ static irqreturn_t dwc3_interrupt(int irq, void *_dwc)
 
 	spin_lock(&dwc->lock);
 
-	for (i = 0; i < DWC3_EVENT_BUFFERS_NUM; i++) {
+	for (i = 0; i < dwc->num_event_buffers; i++) {
 		irqreturn_t status;
 
 		status = dwc3_process_event_buf(dwc, i);
@@ -2076,7 +2177,6 @@ err0:
 void dwc3_gadget_exit(struct dwc3 *dwc)
 {
 	int			irq;
-	int			i;
 
 	usb_del_gadget_udc(&dwc->gadget);
 	irq = platform_get_irq(to_platform_device(dwc->dev), 0);
@@ -2084,9 +2184,6 @@ void dwc3_gadget_exit(struct dwc3 *dwc)
 	dwc3_writel(dwc->regs, DWC3_DEVTEN, 0x00);
 	free_irq(irq, dwc);
 
-	for (i = 0; i < ARRAY_SIZE(dwc->eps); i++)
-		__dwc3_gadget_ep_disable(dwc->eps[i]);
-
 	dwc3_gadget_free_endpoints(dwc);
 
 	dma_free_coherent(dwc->dev, 512, dwc->ep0_bounce,
diff --git a/drivers/usb/dwc3/gadget.h b/drivers/usb/dwc3/gadget.h
index 71145a449d9..d97f467d41c 100644
--- a/drivers/usb/dwc3/gadget.h
+++ b/drivers/usb/dwc3/gadget.h
@@ -79,19 +79,6 @@ struct dwc3_gadget_ep_cmd_params {
 
 /* -------------------------------------------------------------------------- */
 
-struct dwc3_request {
-	struct usb_request	request;
-	struct list_head	list;
-	struct dwc3_ep		*dep;
-
-	u8			epnum;
-	struct dwc3_trb_hw	*trb;
-	dma_addr_t		trb_dma;
-
-	unsigned		direction:1;
-	unsigned		mapped:1;
-	unsigned		queued:1;
-};
 #define to_dwc3_request(r)	(container_of(r, struct dwc3_request, request))
 
 static inline struct dwc3_request *next_request(struct list_head *list)
@@ -110,23 +97,11 @@ static inline void dwc3_gadget_move_request_queued(struct dwc3_request *req)
 	list_move_tail(&req->list, &dep->req_queued);
 }
 
-#if defined(CONFIG_USB_GADGET_DWC3) || defined(CONFIG_USB_GADGET_DWC3_MODULE)
-int dwc3_gadget_init(struct dwc3 *dwc);
-void dwc3_gadget_exit(struct dwc3 *dwc);
-#else
-static inline int dwc3_gadget_init(struct dwc3 *dwc) { return 0; }
-static inline void dwc3_gadget_exit(struct dwc3 *dwc) { }
-static inline int dwc3_send_gadget_ep_cmd(struct dwc3 *dwc, unsigned ep,
-		unsigned cmd, struct dwc3_gadget_ep_cmd_params *params)
-{
-	return 0;
-}
-#endif
-
 void dwc3_gadget_giveback(struct dwc3_ep *dep, struct dwc3_request *req,
 		int status);
 
-void dwc3_ep0_interrupt(struct dwc3 *dwc, const struct dwc3_event_depevt *event);
+void dwc3_ep0_interrupt(struct dwc3 *dwc,
+		const struct dwc3_event_depevt *event);
 void dwc3_ep0_out_start(struct dwc3 *dwc);
 int dwc3_gadget_ep0_queue(struct usb_ep *ep, struct usb_request *request,
 		gfp_t gfp_flags);
diff --git a/drivers/usb/dwc3/host.c b/drivers/usb/dwc3/host.c
new file mode 100644
index 00000000000..7cfe211b6c3
--- /dev/null
+++ b/drivers/usb/dwc3/host.c
@@ -0,0 +1,102 @@
+/**
+ * host.c - DesignWare USB3 DRD Controller Host Glue
+ *
+ * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com
+ *
+ * Authors: Felipe Balbi <balbi@ti.com>,
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions, and the following disclaimer,
+ *    without modification.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. The names of the above-listed copyright holders may not be used
+ *    to endorse or promote products derived from this software without
+ *    specific prior written permission.
+ *
+ * ALTERNATIVELY, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") version 2, as published by the Free
+ * Software Foundation.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
+ * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <linux/platform_device.h>
+
+#include "core.h"
+
+static struct resource generic_resources[] = {
+	{
+		.flags = IORESOURCE_IRQ,
+	},
+	{
+		.flags = IORESOURCE_MEM,
+	},
+};
+
+int dwc3_host_init(struct dwc3 *dwc)
+{
+	struct platform_device	*xhci;
+	int			ret;
+
+	xhci = platform_device_alloc("xhci", -1);
+	if (!xhci) {
+		dev_err(dwc->dev, "couldn't allocate xHCI device\n");
+		ret = -ENOMEM;
+		goto err0;
+	}
+
+	dma_set_coherent_mask(&xhci->dev, dwc->dev->coherent_dma_mask);
+
+	xhci->dev.parent	= dwc->dev;
+	xhci->dev.dma_mask	= dwc->dev->dma_mask;
+	xhci->dev.dma_parms	= dwc->dev->dma_parms;
+
+	dwc->xhci = xhci;
+
+	/* setup resources */
+	generic_resources[0].start = dwc->irq;
+
+	generic_resources[1].start = dwc->res->start;
+	generic_resources[1].end = dwc->res->start + 0x7fff;
+
+	ret = platform_device_add_resources(xhci, generic_resources,
+			ARRAY_SIZE(generic_resources));
+	if (ret) {
+		dev_err(dwc->dev, "couldn't add resources to xHCI device\n");
+		goto err1;
+	}
+
+	ret = platform_device_add(xhci);
+	if (ret) {
+		dev_err(dwc->dev, "failed to register xHCI device\n");
+		goto err1;
+	}
+
+	return 0;
+
+err1:
+	platform_device_put(xhci);
+
+err0:
+	return ret;
+}
+
+void dwc3_host_exit(struct dwc3 *dwc)
+{
+	platform_device_unregister(dwc->xhci);
+}
diff --git a/drivers/usb/dwc3/io.h b/drivers/usb/dwc3/io.h
index bc957db1ea4..071d561f3e6 100644
--- a/drivers/usb/dwc3/io.h
+++ b/drivers/usb/dwc3/io.h
@@ -39,7 +39,7 @@
 #ifndef __DRIVERS_USB_DWC3_IO_H
 #define __DRIVERS_USB_DWC3_IO_H
 
-#include <asm/io.h>
+#include <linux/io.h>
 
 static inline u32 dwc3_readl(void __iomem *base, u32 offset)
 {
diff --git a/drivers/usb/gadget/Kconfig b/drivers/usb/gadget/Kconfig
index 3162a7da872..71108c26c56 100644
--- a/drivers/usb/gadget/Kconfig
+++ b/drivers/usb/gadget/Kconfig
@@ -319,18 +319,6 @@ config USB_PXA_U2O
 	  PXA9xx Processor series include a high speed USB2.0 device
 	  controller, which support high speed and full speed USB peripheral.
 
-config USB_GADGET_DWC3
-	tristate "DesignWare USB3.0 (DRD) Controller"
-	depends on USB_DWC3
-	select USB_GADGET_DUALSPEED
-	select USB_GADGET_SUPERSPEED
-	help
-	  DesignWare USB3.0 controller is a SuperSpeed USB3.0 Controller
-	  which can be configured for peripheral-only, host-only, hub-only
-	  and Dual-Role operation. This Controller was first integrated into
-	  the OMAP5 series of processors. More information about the OMAP5
-	  version of this controller, refer to http://www.ti.com/omap5.
-
 #
 # Controllers available in both integrated and discrete versions
 #
diff --git a/drivers/usb/gadget/amd5536udc.c b/drivers/usb/gadget/amd5536udc.c
index 4730016d7cd..45f422ac103 100644
--- a/drivers/usb/gadget/amd5536udc.c
+++ b/drivers/usb/gadget/amd5536udc.c
@@ -1959,7 +1959,7 @@ static int amd5536_start(struct usb_gadget_driver *driver,
 	u32 tmp;
 
 	if (!driver || !bind || !driver->setup
-			|| driver->speed != USB_SPEED_HIGH)
+			|| driver->speed < USB_SPEED_HIGH)
 		return -EINVAL;
 	if (!dev)
 		return -ENODEV;
diff --git a/drivers/usb/gadget/f_serial.c b/drivers/usb/gadget/f_serial.c
index 91fdf790ed2..cf33a8d0fd5 100644
--- a/drivers/usb/gadget/f_serial.c
+++ b/drivers/usb/gadget/f_serial.c
@@ -131,8 +131,8 @@ static int gser_set_alt(struct usb_function *f, unsigned intf, unsigned alt)
 	}
 	if (!gser->port.in->desc || !gser->port.out->desc) {
 		DBG(cdev, "activate generic ttyGS%d\n", gser->port_num);
-		if (!config_ep_by_speed(cdev->gadget, f, gser->port.in) ||
-		    !config_ep_by_speed(cdev->gadget, f, gser->port.out)) {
+		if (config_ep_by_speed(cdev->gadget, f, gser->port.in) ||
+		    config_ep_by_speed(cdev->gadget, f, gser->port.out)) {
 			gser->port.in->desc = NULL;
 			gser->port.out->desc = NULL;
 			return -EINVAL;
diff --git a/drivers/usb/gadget/fsl_mxc_udc.c b/drivers/usb/gadget/fsl_mxc_udc.c
index 43a49ecc1f3..dcbc0a2e48d 100644
--- a/drivers/usb/gadget/fsl_mxc_udc.c
+++ b/drivers/usb/gadget/fsl_mxc_udc.c
@@ -16,6 +16,7 @@
 #include <linux/err.h>
 #include <linux/fsl_devices.h>
 #include <linux/platform_device.h>
+#include <linux/io.h>
 
 #include <mach/hardware.h>
 
@@ -88,7 +89,6 @@ eenahb:
 void fsl_udc_clk_finalize(struct platform_device *pdev)
 {
 	struct fsl_usb2_platform_data *pdata = pdev->dev.platform_data;
-#if defined(CONFIG_SOC_IMX35)
 	if (cpu_is_mx35()) {
 		unsigned int v;
 
@@ -101,7 +101,6 @@ void fsl_udc_clk_finalize(struct platform_device *pdev)
 					USBPHYCTRL_OTGBASE_OFFSET));
 		}
 	}
-#endif
 
 	/* ULPI transceivers don't need usbpll */
 	if (pdata->phy_mode == FSL_USB2_PHY_ULPI) {
diff --git a/drivers/usb/gadget/fsl_qe_udc.c b/drivers/usb/gadget/fsl_qe_udc.c
index 811ea76ae76..f75c56a259a 100644
--- a/drivers/usb/gadget/fsl_qe_udc.c
+++ b/drivers/usb/gadget/fsl_qe_udc.c
@@ -2336,8 +2336,7 @@ static int fsl_qe_start(struct usb_gadget_driver *driver,
 	if (!udc_controller)
 		return -ENODEV;
 
-	if (!driver || (driver->speed != USB_SPEED_FULL
-			&& driver->speed != USB_SPEED_HIGH)
+	if (!driver || driver->speed < USB_SPEED_FULL
 			|| !bind || !driver->disconnect || !driver->setup)
 		return -EINVAL;
 
diff --git a/drivers/usb/gadget/fsl_udc_core.c b/drivers/usb/gadget/fsl_udc_core.c
index b3b3d83b7c3..dd28ef3def7 100644
--- a/drivers/usb/gadget/fsl_udc_core.c
+++ b/drivers/usb/gadget/fsl_udc_core.c
@@ -696,12 +696,31 @@ static void fsl_free_request(struct usb_ep *_ep, struct usb_request *_req)
 		kfree(req);
 }
 
-/*-------------------------------------------------------------------------*/
+/* Actually add a dTD chain to an empty dQH and let go */
+static void fsl_prime_ep(struct fsl_ep *ep, struct ep_td_struct *td)
+{
+	struct ep_queue_head *qh = get_qh_by_ep(ep);
+
+	/* Write dQH next pointer and terminate bit to 0 */
+	qh->next_dtd_ptr = cpu_to_hc32(td->td_dma
+			& EP_QUEUE_HEAD_NEXT_POINTER_MASK);
+
+	/* Clear active and halt bit */
+	qh->size_ioc_int_sts &= cpu_to_hc32(~(EP_QUEUE_HEAD_STATUS_ACTIVE
+					| EP_QUEUE_HEAD_STATUS_HALT));
+
+	/* Ensure that updates to the QH will occur before priming. */
+	wmb();
+
+	/* Prime endpoint by writing correct bit to ENDPTPRIME */
+	fsl_writel(ep_is_in(ep) ? (1 << (ep_index(ep) + 16))
+			: (1 << (ep_index(ep))), &dr_regs->endpointprime);
+}
+
+/* Add dTD chain to the dQH of an EP */
 static void fsl_queue_td(struct fsl_ep *ep, struct fsl_req *req)
 {
-	int i = ep_index(ep) * 2 + ep_is_in(ep);
 	u32 temp, bitmask, tmp_stat;
-	struct ep_queue_head *dQH = &ep->udc->ep_qh[i];
 
 	/* VDBG("QH addr Register 0x%8x", dr_regs->endpointlistaddr);
 	VDBG("ep_qh[%d] addr is 0x%8x", i, (u32)&(ep->udc->ep_qh[i])); */
@@ -719,7 +738,7 @@ static void fsl_queue_td(struct fsl_ep *ep, struct fsl_req *req)
 			cpu_to_hc32(req->head->td_dma & DTD_ADDR_MASK);
 		/* Read prime bit, if 1 goto done */
 		if (fsl_readl(&dr_regs->endpointprime) & bitmask)
-			goto out;
+			return;
 
 		do {
 			/* Set ATDTW bit in USBCMD */
@@ -736,28 +755,10 @@ static void fsl_queue_td(struct fsl_ep *ep, struct fsl_req *req)
 		fsl_writel(temp & ~USB_CMD_ATDTW, &dr_regs->usbcmd);
 
 		if (tmp_stat)
-			goto out;
+			return;
 	}
 
-	/* Write dQH next pointer and terminate bit to 0 */
-	temp = req->head->td_dma & EP_QUEUE_HEAD_NEXT_POINTER_MASK;
-	dQH->next_dtd_ptr = cpu_to_hc32(temp);
-
-	/* Clear active and halt bit */
-	temp = cpu_to_hc32(~(EP_QUEUE_HEAD_STATUS_ACTIVE
-			| EP_QUEUE_HEAD_STATUS_HALT));
-	dQH->size_ioc_int_sts &= temp;
-
-	/* Ensure that updates to the QH will occur before priming. */
-	wmb();
-
-	/* Prime endpoint by writing 1 to ENDPTPRIME */
-	temp = ep_is_in(ep)
-		? (1 << (ep_index(ep) + 16))
-		: (1 << (ep_index(ep)));
-	fsl_writel(temp, &dr_regs->endpointprime);
-out:
-	return;
+	fsl_prime_ep(ep, req->head);
 }
 
 /* Fill in the dTD structure
@@ -877,7 +878,7 @@ fsl_ep_queue(struct usb_ep *_ep, struct usb_request *_req, gfp_t gfp_flags)
 		VDBG("%s, bad ep", __func__);
 		return -EINVAL;
 	}
-	if (ep->desc->bmAttributes == USB_ENDPOINT_XFER_ISOC) {
+	if (usb_endpoint_xfer_isoc(ep->desc)) {
 		if (req->req.length > ep->ep.maxpacket)
 			return -EMSGSIZE;
 	}
@@ -973,25 +974,20 @@ static int fsl_ep_dequeue(struct usb_ep *_ep, struct usb_request *_req)
 
 		/* The request isn't the last request in this ep queue */
 		if (req->queue.next != &ep->queue) {
-			struct ep_queue_head *qh;
 			struct fsl_req *next_req;
 
-			qh = ep->qh;
 			next_req = list_entry(req->queue.next, struct fsl_req,
 					queue);
 
-			/* Point the QH to the first TD of next request */
-			fsl_writel((u32) next_req->head, &qh->curr_dtd_ptr);
+			/* prime with dTD of next request */
+			fsl_prime_ep(ep, next_req->head);
 		}
-
-		/* The request hasn't been processed, patch up the TD chain */
+	/* The request hasn't been processed, patch up the TD chain */
 	} else {
 		struct fsl_req *prev_req;
 
 		prev_req = list_entry(req->queue.prev, struct fsl_req, queue);
-		fsl_writel(fsl_readl(&req->tail->next_td_ptr),
-				&prev_req->tail->next_td_ptr);
-
+		prev_req->tail->next_td_ptr = req->tail->next_td_ptr;
 	}
 
 	done(ep, req, -ECONNRESET);
@@ -1032,7 +1028,7 @@ static int fsl_ep_set_halt(struct usb_ep *_ep, int value)
 		goto out;
 	}
 
-	if (ep->desc->bmAttributes == USB_ENDPOINT_XFER_ISOC) {
+	if (usb_endpoint_xfer_isoc(ep->desc)) {
 		status = -EOPNOTSUPP;
 		goto out;
 	}
@@ -1068,7 +1064,7 @@ static int fsl_ep_fifo_status(struct usb_ep *_ep)
 	struct fsl_udc *udc;
 	int size = 0;
 	u32 bitmask;
-	struct ep_queue_head *d_qh;
+	struct ep_queue_head *qh;
 
 	ep = container_of(_ep, struct fsl_ep, ep);
 	if (!_ep || (!ep->desc && ep_index(ep) != 0))
@@ -1079,13 +1075,13 @@ static int fsl_ep_fifo_status(struct usb_ep *_ep)
 	if (!udc->driver || udc->gadget.speed == USB_SPEED_UNKNOWN)
 		return -ESHUTDOWN;
 
-	d_qh = &ep->udc->ep_qh[ep_index(ep) * 2 + ep_is_in(ep)];
+	qh = get_qh_by_ep(ep);
 
 	bitmask = (ep_is_in(ep)) ? (1 << (ep_index(ep) + 16)) :
 	    (1 << (ep_index(ep)));
 
 	if (fsl_readl(&dr_regs->endptstatus) & bitmask)
-		size = (d_qh->size_ioc_int_sts & DTD_PACKET_SIZE)
+		size = (qh->size_ioc_int_sts & DTD_PACKET_SIZE)
 		    >> DTD_LENGTH_BIT_POS;
 
 	pr_debug("%s %u\n", __func__, size);
@@ -1938,8 +1934,7 @@ static int fsl_start(struct usb_gadget_driver *driver,
 	if (!udc_controller)
 		return -ENODEV;
 
-	if (!driver || (driver->speed != USB_SPEED_FULL
-				&& driver->speed != USB_SPEED_HIGH)
+	if (!driver || driver->speed < USB_SPEED_FULL
 			|| !bind || !driver->disconnect || !driver->setup)
 		return -EINVAL;
 
diff --git a/drivers/usb/gadget/fsl_usb2_udc.h b/drivers/usb/gadget/fsl_usb2_udc.h
index 1d51be83fda..f781f5dec41 100644
--- a/drivers/usb/gadget/fsl_usb2_udc.h
+++ b/drivers/usb/gadget/fsl_usb2_udc.h
@@ -569,6 +569,16 @@ static void dump_msg(const char *label, const u8 * buf, unsigned int length)
 					* 2 + ((windex & USB_DIR_IN) ? 1 : 0))
 #define get_pipe_by_ep(EP)	(ep_index(EP) * 2 + ep_is_in(EP))
 
+static inline struct ep_queue_head *get_qh_by_ep(struct fsl_ep *ep)
+{
+	/* we only have one ep0 structure but two queue heads */
+	if (ep_index(ep) != 0)
+		return ep->qh;
+	else
+		return &ep->udc->ep_qh[(ep->udc->ep0_dir ==
+				USB_DIR_IN) ? 1 : 0];
+}
+
 struct platform_device;
 #ifdef CONFIG_ARCH_MXC
 int fsl_udc_clk_init(struct platform_device *pdev);
diff --git a/drivers/usb/gadget/m66592-udc.c b/drivers/usb/gadget/m66592-udc.c
index 91d0af2a24a..9aa1cbbee45 100644
--- a/drivers/usb/gadget/m66592-udc.c
+++ b/drivers/usb/gadget/m66592-udc.c
@@ -1472,7 +1472,7 @@ static int m66592_start(struct usb_gadget_driver *driver,
 	int retval;
 
 	if (!driver
-			|| driver->speed != USB_SPEED_HIGH
+			|| driver->speed < USB_SPEED_HIGH
 			|| !bind
 			|| !driver->setup)
 		return -EINVAL;
diff --git a/drivers/usb/gadget/net2280.c b/drivers/usb/gadget/net2280.c
index 7f1bc9a73cd..da2b9d0be3c 100644
--- a/drivers/usb/gadget/net2280.c
+++ b/drivers/usb/gadget/net2280.c
@@ -1881,7 +1881,7 @@ static int net2280_start(struct usb_gadget *_gadget,
 	 * (dev->usb->xcvrdiag & FORCE_FULL_SPEED_MODE)
 	 * "must not be used in normal operation"
 	 */
-	if (!driver || driver->speed != USB_SPEED_HIGH
+	if (!driver || driver->speed < USB_SPEED_HIGH
 			|| !driver->setup)
 		return -EINVAL;
 
diff --git a/drivers/usb/gadget/r8a66597-udc.c b/drivers/usb/gadget/r8a66597-udc.c
index 24f84b210ce..fc719a3f855 100644
--- a/drivers/usb/gadget/r8a66597-udc.c
+++ b/drivers/usb/gadget/r8a66597-udc.c
@@ -1746,7 +1746,7 @@ static int r8a66597_start(struct usb_gadget *gadget,
 	struct r8a66597 *r8a66597 = gadget_to_r8a66597(gadget);
 
 	if (!driver
-			|| driver->speed != USB_SPEED_HIGH
+			|| driver->speed < USB_SPEED_HIGH
 			|| !driver->setup)
 		return -EINVAL;
 	if (!r8a66597)
diff --git a/drivers/usb/gadget/s3c-hsotg.c b/drivers/usb/gadget/s3c-hsotg.c
index 745a3081fb3..c59156c0061 100644
--- a/drivers/usb/gadget/s3c-hsotg.c
+++ b/drivers/usb/gadget/s3c-hsotg.c
@@ -2586,10 +2586,8 @@ static int s3c_hsotg_start(struct usb_gadget_driver *driver,
 		return -EINVAL;
 	}
 
-	if (driver->speed != USB_SPEED_HIGH &&
-	    driver->speed != USB_SPEED_FULL) {
+	if (driver->speed < USB_SPEED_FULL)
 		dev_err(hsotg->dev, "%s: bad speed\n", __func__);
-	}
 
 	if (!bind || !driver->setup) {
 		dev_err(hsotg->dev, "%s: missing entry points\n", __func__);
diff --git a/drivers/usb/gadget/s3c-hsudc.c b/drivers/usb/gadget/s3c-hsudc.c
index baf506a66de..787ac5baae9 100644
--- a/drivers/usb/gadget/s3c-hsudc.c
+++ b/drivers/usb/gadget/s3c-hsudc.c
@@ -1142,8 +1142,7 @@ static int s3c_hsudc_start(struct usb_gadget_driver *driver,
 	int ret;
 
 	if (!driver
-		|| (driver->speed != USB_SPEED_FULL &&
-			driver->speed != USB_SPEED_HIGH)
+		|| driver->speed < USB_SPEED_FULL
 		|| !bind
 		|| !driver->unbind || !driver->disconnect || !driver->setup)
 		return -EINVAL;
diff --git a/drivers/usb/host/ehci-sched.c b/drivers/usb/host/ehci-sched.c
index 56a32033adb..a60679cbbf8 100644
--- a/drivers/usb/host/ehci-sched.c
+++ b/drivers/usb/host/ehci-sched.c
@@ -1475,6 +1475,7 @@ iso_stream_schedule (
 	 * jump until after the queue is primed.
 	 */
 	else {
+		int done = 0;
 		start = SCHEDULE_SLOP + (now & ~0x07);
 
 		/* NOTE:  assumes URB_ISO_ASAP, to limit complexity/bugs */
@@ -1492,18 +1493,18 @@ iso_stream_schedule (
 			if (stream->highspeed) {
 				if (itd_slot_ok(ehci, mod, start,
 						stream->usecs, period))
-					break;
+					done = 1;
 			} else {
 				if ((start % 8) >= 6)
 					continue;
 				if (sitd_slot_ok(ehci, mod, stream,
 						start, sched, period))
-					break;
+					done = 1;
 			}
-		} while (start > next);
+		} while (start > next && !done);
 
 		/* no room in the schedule */
-		if (start == next) {
+		if (!done) {
 			ehci_dbg(ehci, "iso resched full %p (now %d max %d)\n",
 				urb, now, now + mod);
 			status = -ENOSPC;
diff --git a/drivers/usb/host/whci/qset.c b/drivers/usb/host/whci/qset.c
index a91712c8bff..76083ae9213 100644
--- a/drivers/usb/host/whci/qset.c
+++ b/drivers/usb/host/whci/qset.c
@@ -124,7 +124,7 @@ void qset_clear(struct whc *whc, struct whc_qset *qset)
 {
 	qset->td_start = qset->td_end = qset->ntds = 0;
 
-	qset->qh.link = cpu_to_le32(QH_LINK_NTDS(8) | QH_LINK_T);
+	qset->qh.link = cpu_to_le64(QH_LINK_NTDS(8) | QH_LINK_T);
 	qset->qh.status = qset->qh.status & QH_STATUS_SEQ_MASK;
 	qset->qh.err_count = 0;
 	qset->qh.scratch[0] = 0;
diff --git a/drivers/usb/host/xhci.c b/drivers/usb/host/xhci.c
index aa94c019579..a1afb7c39f7 100644
--- a/drivers/usb/host/xhci.c
+++ b/drivers/usb/host/xhci.c
@@ -711,7 +711,10 @@ static void xhci_clear_command_ring(struct xhci_hcd *xhci)
 	ring = xhci->cmd_ring;
 	seg = ring->deq_seg;
 	do {
-		memset(seg->trbs, 0, SEGMENT_SIZE);
+		memset(seg->trbs, 0,
+			sizeof(union xhci_trb) * (TRBS_PER_SEGMENT - 1));
+		seg->trbs[TRBS_PER_SEGMENT - 1].link.control &=
+			cpu_to_le32(~TRB_CYCLE);
 		seg = seg->next;
 	} while (seg != ring->deq_seg);
 
diff --git a/drivers/usb/musb/musb_core.c b/drivers/usb/musb/musb_core.c
index 54958508679..227c1dfa6be 100644
--- a/drivers/usb/musb/musb_core.c
+++ b/drivers/usb/musb/musb_core.c
@@ -2300,18 +2300,12 @@ static int musb_suspend(struct device *dev)
 		 */
 	}
 
-	musb_save_context(musb);
-
 	spin_unlock_irqrestore(&musb->lock, flags);
 	return 0;
 }
 
 static int musb_resume_noirq(struct device *dev)
 {
-	struct musb	*musb = dev_to_musb(dev);
-
-	musb_restore_context(musb);
-
 	/* for static cmos like DaVinci, register values were preserved
 	 * unless for some reason the whole soc powered down or the USB
 	 * module got reset through the PSC (vs just being disabled).
diff --git a/drivers/usb/musb/musb_gadget.c b/drivers/usb/musb/musb_gadget.c
index d51043acfe1..922148ff8d2 100644
--- a/drivers/usb/musb/musb_gadget.c
+++ b/drivers/usb/musb/musb_gadget.c
@@ -1903,7 +1903,7 @@ static int musb_gadget_start(struct usb_gadget *g,
 	unsigned long		flags;
 	int			retval = -EINVAL;
 
-	if (driver->speed != USB_SPEED_HIGH)
+	if (driver->speed < USB_SPEED_HIGH)
 		goto err0;
 
 	pm_runtime_get_sync(musb->controller);
diff --git a/drivers/usb/renesas_usbhs/mod_gadget.c b/drivers/usb/renesas_usbhs/mod_gadget.c
index d9717e0bc1f..7f4e8033857 100644
--- a/drivers/usb/renesas_usbhs/mod_gadget.c
+++ b/drivers/usb/renesas_usbhs/mod_gadget.c
@@ -751,53 +751,32 @@ static int usbhsg_gadget_start(struct usb_gadget *gadget,
 		struct usb_gadget_driver *driver)
 {
 	struct usbhsg_gpriv *gpriv = usbhsg_gadget_to_gpriv(gadget);
-	struct usbhs_priv *priv;
-	struct device *dev;
-	int ret;
+	struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv);
 
 	if (!driver		||
 	    !driver->setup	||
-	    driver->speed != USB_SPEED_HIGH)
+	    driver->speed < USB_SPEED_FULL)
 		return -EINVAL;
 
-	dev  = usbhsg_gpriv_to_dev(gpriv);
-	priv = usbhsg_gpriv_to_priv(gpriv);
-
 	/* first hook up the driver ... */
 	gpriv->driver = driver;
 	gpriv->gadget.dev.driver = &driver->driver;
 
-	ret = device_add(&gpriv->gadget.dev);
-	if (ret) {
-		dev_err(dev, "device_add error %d\n", ret);
-		goto add_fail;
-	}
-
 	return usbhsg_try_start(priv, USBHSG_STATUS_REGISTERD);
-
-add_fail:
-	gpriv->driver = NULL;
-	gpriv->gadget.dev.driver = NULL;
-
-	return ret;
 }
 
 static int usbhsg_gadget_stop(struct usb_gadget *gadget,
 		struct usb_gadget_driver *driver)
 {
 	struct usbhsg_gpriv *gpriv = usbhsg_gadget_to_gpriv(gadget);
-	struct usbhs_priv *priv;
-	struct device *dev;
+	struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv);
 
 	if (!driver		||
 	    !driver->unbind)
 		return -EINVAL;
 
-	dev  = usbhsg_gpriv_to_dev(gpriv);
-	priv = usbhsg_gpriv_to_priv(gpriv);
-
 	usbhsg_try_stop(priv, USBHSG_STATUS_REGISTERD);
-	device_del(&gpriv->gadget.dev);
+	gpriv->gadget.dev.driver = NULL;
 	gpriv->driver = NULL;
 
 	return 0;
@@ -827,6 +806,13 @@ static int usbhsg_start(struct usbhs_priv *priv)
 
 static int usbhsg_stop(struct usbhs_priv *priv)
 {
+	struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
+
+	/* cable disconnect */
+	if (gpriv->driver &&
+	    gpriv->driver->disconnect)
+		gpriv->driver->disconnect(&gpriv->gadget);
+
 	return usbhsg_try_stop(priv, USBHSG_STATUS_STARTED);
 }
 
@@ -876,12 +862,14 @@ int usbhs_mod_gadget_probe(struct usbhs_priv *priv)
 	/*
 	 * init gadget
 	 */
-	device_initialize(&gpriv->gadget.dev);
 	dev_set_name(&gpriv->gadget.dev, "gadget");
 	gpriv->gadget.dev.parent	= dev;
 	gpriv->gadget.name		= "renesas_usbhs_udc";
 	gpriv->gadget.ops		= &usbhsg_gadget_ops;
 	gpriv->gadget.is_dualspeed	= 1;
+	ret = device_register(&gpriv->gadget.dev);
+	if (ret < 0)
+		goto err_add_udc;
 
 	INIT_LIST_HEAD(&gpriv->gadget.ep_list);
 
@@ -912,12 +900,15 @@ int usbhs_mod_gadget_probe(struct usbhs_priv *priv)
 
 	ret = usb_add_gadget_udc(dev, &gpriv->gadget);
 	if (ret)
-		goto err_add_udc;
+		goto err_register;
 
 
 	dev_info(dev, "gadget probed\n");
 
 	return 0;
+
+err_register:
+	device_unregister(&gpriv->gadget.dev);
 err_add_udc:
 	kfree(gpriv->uep);
 
@@ -933,6 +924,8 @@ void usbhs_mod_gadget_remove(struct usbhs_priv *priv)
 
 	usb_del_gadget_udc(&gpriv->gadget);
 
+	device_unregister(&gpriv->gadget.dev);
+
 	usbhsg_controller_unregister(gpriv);
 
 	kfree(gpriv->uep);
diff --git a/drivers/usb/serial/ftdi_sio.c b/drivers/usb/serial/ftdi_sio.c
index 13e4ecc6e43..c290df97108 100644
--- a/drivers/usb/serial/ftdi_sio.c
+++ b/drivers/usb/serial/ftdi_sio.c
@@ -736,6 +736,7 @@ static struct usb_device_id id_table_combined [] = {
 	{ USB_DEVICE(TML_VID, TML_USB_SERIAL_PID) },
 	{ USB_DEVICE(FTDI_VID, FTDI_ELSTER_UNICOM_PID) },
 	{ USB_DEVICE(FTDI_VID, FTDI_PROPOX_JTAGCABLEII_PID) },
+	{ USB_DEVICE(FTDI_VID, FTDI_PROPOX_ISPCABLEIII_PID) },
 	{ USB_DEVICE(OLIMEX_VID, OLIMEX_ARM_USB_OCD_PID),
 		.driver_info = (kernel_ulong_t)&ftdi_jtag_quirk },
 	{ USB_DEVICE(OLIMEX_VID, OLIMEX_ARM_USB_OCD_H_PID),
diff --git a/drivers/usb/serial/ftdi_sio_ids.h b/drivers/usb/serial/ftdi_sio_ids.h
index 571fa96b49c..055b64ef0bb 100644
--- a/drivers/usb/serial/ftdi_sio_ids.h
+++ b/drivers/usb/serial/ftdi_sio_ids.h
@@ -112,6 +112,7 @@
 
 /* Propox devices */
 #define FTDI_PROPOX_JTAGCABLEII_PID	0xD738
+#define FTDI_PROPOX_ISPCABLEIII_PID	0xD739
 
 /* Lenz LI-USB Computer Interface. */
 #define FTDI_LENZ_LIUSB_PID	0xD780
diff --git a/drivers/usb/serial/option.c b/drivers/usb/serial/option.c
index d865878c9f9..e3426602dc8 100644
--- a/drivers/usb/serial/option.c
+++ b/drivers/usb/serial/option.c
@@ -661,6 +661,9 @@ static const struct usb_device_id option_ids[] = {
 	{ USB_DEVICE_AND_INTERFACE_INFO(HUAWEI_VENDOR_ID, HUAWEI_PRODUCT_K4511, 0xff, 0x01, 0x31) },
 	{ USB_DEVICE_AND_INTERFACE_INFO(HUAWEI_VENDOR_ID, HUAWEI_PRODUCT_K4511, 0xff, 0x01, 0x32) },
 	{ USB_DEVICE_AND_INTERFACE_INFO(HUAWEI_VENDOR_ID, HUAWEI_PRODUCT_E353, 0xff, 0x01, 0x01) },
+	{ USB_DEVICE_AND_INTERFACE_INFO(HUAWEI_VENDOR_ID, HUAWEI_PRODUCT_E353, 0xff, 0x01, 0x02) },
+	{ USB_DEVICE_AND_INTERFACE_INFO(HUAWEI_VENDOR_ID, HUAWEI_PRODUCT_E353, 0xff, 0x01, 0x03) },
+	{ USB_DEVICE_AND_INTERFACE_INFO(HUAWEI_VENDOR_ID, HUAWEI_PRODUCT_E353, 0xff, 0x01, 0x08) },
 	{ USB_DEVICE(NOVATELWIRELESS_VENDOR_ID, NOVATELWIRELESS_PRODUCT_V640) },
 	{ USB_DEVICE(NOVATELWIRELESS_VENDOR_ID, NOVATELWIRELESS_PRODUCT_V620) },
 	{ USB_DEVICE(NOVATELWIRELESS_VENDOR_ID, NOVATELWIRELESS_PRODUCT_V740) },
@@ -747,6 +750,7 @@ static const struct usb_device_id option_ids[] = {
 	{ USB_DEVICE(KYOCERA_VENDOR_ID, KYOCERA_PRODUCT_KPC680) },
 	{ USB_DEVICE(QUALCOMM_VENDOR_ID, 0x6000)}, /* ZTE AC8700 */
 	{ USB_DEVICE(QUALCOMM_VENDOR_ID, 0x6613)}, /* Onda H600/ZTE MF330 */
+	{ USB_DEVICE(QUALCOMM_VENDOR_ID, 0x9000)}, /* SIMCom SIM5218 */
 	{ USB_DEVICE(CMOTECH_VENDOR_ID, CMOTECH_PRODUCT_6280) }, /* BP3-USB & BP3-EXT HSDPA */
 	{ USB_DEVICE(CMOTECH_VENDOR_ID, CMOTECH_PRODUCT_6008) },
 	{ USB_DEVICE(TELIT_VENDOR_ID, TELIT_PRODUCT_UC864E) },
diff --git a/drivers/usb/storage/unusual_devs.h b/drivers/usb/storage/unusual_devs.h
index 3041a974faf..24caba79d72 100644
--- a/drivers/usb/storage/unusual_devs.h
+++ b/drivers/usb/storage/unusual_devs.h
@@ -1854,6 +1854,13 @@ UNUSUAL_DEV(  0x1370, 0x6828, 0x0110, 0x0110,
 		USB_SC_DEVICE, USB_PR_DEVICE, NULL,
 		US_FL_IGNORE_RESIDUE ),
 
+/* Reported by Qinglin Ye <yestyle@gmail.com> */
+UNUSUAL_DEV(  0x13fe, 0x3600, 0x0100, 0x0100,
+		"Kingston",
+		"DT 101 G2",
+		USB_SC_DEVICE, USB_PR_DEVICE, NULL,
+		US_FL_BULK_IGNORE_TAG ),
+
 /* Reported by Francesco Foresti <frafore@tiscali.it> */
 UNUSUAL_DEV(  0x14cd, 0x6600, 0x0201, 0x0201,
 		"Super Top",