Merge tag 'gadget-for-v3.5' of git://git.kernel.org/pub/scm/linux/kernel/git/balbi/usb into usb-next

usb: gadget: patches for v3.5

This pull request is quite big, but mainly because there's a
giant rework of the s3c_hsotg.c driver to make it friendlier
for other users. Samsung Exynos platforms use the DesignWare
Core USB2 IP from Synopsys so it's a bit unfair to have the
driver work for Samsung platforms only. In short, the big
rework is in preparation to make the driver more reusable.

Another big rework in this pull request came from Ido, where
he's removing the redundant pointer for the endpoint descriptor
from the controller driver's own endpoint representation. The
same pointer is available through the generic struct usb_ep
structure.

Also on this pull request is the conversion of a few extra
controller drivers to the new style registration, which allows
multiple controllers to be available on the same platform and
helps remove global pointers from those drivers.

Together with those big changes, there's the usual fixes and cleanups
to gadget drivers. Nothing major.

46 files changed, 2174 insertions, 1732 deletions

diff --git a/drivers/usb/gadget/Kconfig b/drivers/usb/gadget/Kconfig
index 82769727131..fb883e1405b 100644
--- a/drivers/usb/gadget/Kconfig
+++ b/drivers/usb/gadget/Kconfig
@@ -172,7 +172,7 @@ config USB_FSL_USB2
 	select USB_GADGET_DUALSPEED
 	select USB_FSL_MPH_DR_OF if OF
 	help
-	   Some of Freescale PowerPC processors have a High Speed
+	   Some of Freescale PowerPC and i.MX processors have a High Speed
 	   Dual-Role(DR) USB controller, which supports device mode.
 
 	   The number of programmable endpoints is different through
diff --git a/drivers/usb/gadget/amd5536udc.c b/drivers/usb/gadget/amd5536udc.c
index 77779271f48..187d21181cd 100644
--- a/drivers/usb/gadget/amd5536udc.c
+++ b/drivers/usb/gadget/amd5536udc.c
@@ -333,7 +333,7 @@ udc_ep_enable(struct usb_ep *usbep, const struct usb_endpoint_descriptor *desc)
 		return -ESHUTDOWN;
 
 	spin_lock_irqsave(&dev->lock, iflags);
-	ep->desc = desc;
+	ep->ep.desc = desc;
 
 	ep->halted = 0;
 
@@ -442,7 +442,6 @@ static void ep_init(struct udc_regs __iomem *regs, struct udc_ep *ep)
 	u32		tmp;
 
 	VDBG(ep->dev, "ep-%d reset\n", ep->num);
-	ep->desc = NULL;
 	ep->ep.desc = NULL;
 	ep->ep.ops = &udc_ep_ops;
 	INIT_LIST_HEAD(&ep->queue);
@@ -489,7 +488,7 @@ static int udc_ep_disable(struct usb_ep *usbep)
 		return -EINVAL;
 
 	ep = container_of(usbep, struct udc_ep, ep);
-	if (usbep->name == ep0_string || !ep->desc)
+	if (usbep->name == ep0_string || !ep->ep.desc)
 		return -EINVAL;
 
 	DBG(ep->dev, "Disable ep-%d\n", ep->num);
@@ -1066,7 +1065,7 @@ udc_queue(struct usb_ep *usbep, struct usb_request *usbreq, gfp_t gfp)
 		return -EINVAL;
 
 	ep = container_of(usbep, struct udc_ep, ep);
-	if (!ep->desc && (ep->num != 0 && ep->num != UDC_EP0OUT_IX))
+	if (!ep->ep.desc && (ep->num != 0 && ep->num != UDC_EP0OUT_IX))
 		return -EINVAL;
 
 	VDBG(ep->dev, "udc_queue(): ep%d-in=%d\n", ep->num, ep->in);
@@ -1257,7 +1256,7 @@ static int udc_dequeue(struct usb_ep *usbep, struct usb_request *usbreq)
 	unsigned long		iflags;
 
 	ep = container_of(usbep, struct udc_ep, ep);
-	if (!usbep || !usbreq || (!ep->desc && (ep->num != 0
+	if (!usbep || !usbreq || (!ep->ep.desc && (ep->num != 0
 				&& ep->num != UDC_EP0OUT_IX)))
 		return -EINVAL;
 
@@ -1317,7 +1316,7 @@ udc_set_halt(struct usb_ep *usbep, int halt)
 	pr_debug("set_halt %s: halt=%d\n", usbep->name, halt);
 
 	ep = container_of(usbep, struct udc_ep, ep);
-	if (!ep->desc && (ep->num != 0 && ep->num != UDC_EP0OUT_IX))
+	if (!ep->ep.desc && (ep->num != 0 && ep->num != UDC_EP0OUT_IX))
 		return -EINVAL;
 	if (!ep->dev->driver || ep->dev->gadget.speed == USB_SPEED_UNKNOWN)
 		return -ESHUTDOWN;
@@ -1539,7 +1538,7 @@ static void udc_setup_endpoints(struct udc *dev)
 		 * disabling ep interrupts when ENUM interrupt occurs but ep is
 		 * not enabled by gadget driver
 		 */
-		if (!ep->desc)
+		if (!ep->ep.desc)
 			ep_init(dev->regs, ep);
 
 		if (use_dma) {
@@ -3402,19 +3401,7 @@ static struct pci_driver udc_pci_driver = {
 	.remove =	udc_pci_remove,
 };
 
-/* Inits driver */
-static int __init init(void)
-{
-	return pci_register_driver(&udc_pci_driver);
-}
-module_init(init);
-
-/* Cleans driver */
-static void __exit cleanup(void)
-{
-	pci_unregister_driver(&udc_pci_driver);
-}
-module_exit(cleanup);
+module_pci_driver(udc_pci_driver);
 
 MODULE_DESCRIPTION(UDC_MOD_DESCRIPTION);
 MODULE_AUTHOR("Thomas Dahlmann");
diff --git a/drivers/usb/gadget/amd5536udc.h b/drivers/usb/gadget/amd5536udc.h
index f87e29c6532..14af87d65ca 100644
--- a/drivers/usb/gadget/amd5536udc.h
+++ b/drivers/usb/gadget/amd5536udc.h
@@ -512,7 +512,6 @@ struct udc_ep {
 
 	/* queue for requests */
 	struct list_head		queue;
-	const struct usb_endpoint_descriptor	*desc;
 	unsigned			halted;
 	unsigned			cancel_transfer;
 	unsigned			num : 5,
diff --git a/drivers/usb/gadget/at91_udc.c b/drivers/usb/gadget/at91_udc.c
index 9d7bcd91007..43943aa965d 100644
--- a/drivers/usb/gadget/at91_udc.c
+++ b/drivers/usb/gadget/at91_udc.c
@@ -212,7 +212,7 @@ static int proc_udc_show(struct seq_file *s, void *unused)
 	if (udc->enabled && udc->vbus) {
 		proc_ep_show(s, &udc->ep[0]);
 		list_for_each_entry (ep, &udc->gadget.ep_list, ep.ep_list) {
-			if (ep->desc)
+			if (ep->ep.desc)
 				proc_ep_show(s, ep);
 		}
 	}
@@ -530,7 +530,7 @@ ok:
 	tmp |= AT91_UDP_EPEDS;
 	__raw_writel(tmp, ep->creg);
 
-	ep->desc = desc;
+	ep->ep.desc = desc;
 	ep->ep.maxpacket = maxpacket;
 
 	/*
@@ -558,7 +558,6 @@ static int at91_ep_disable (struct usb_ep * _ep)
 	nuke(ep, -ESHUTDOWN);
 
 	/* restore the endpoint's pristine config */
-	ep->desc = NULL;
 	ep->ep.desc = NULL;
 	ep->ep.maxpacket = ep->maxpacket;
 
@@ -618,7 +617,7 @@ static int at91_ep_queue(struct usb_ep *_ep,
 		return -EINVAL;
 	}
 
-	if (!_ep || (!ep->desc && ep->ep.name != ep0name)) {
+	if (!_ep || (!ep->ep.desc && ep->ep.name != ep0name)) {
 		DBG("invalid ep\n");
 		return -EINVAL;
 	}
@@ -833,7 +832,7 @@ static void udc_reinit(struct at91_udc *udc)
 
 		if (i != 0)
 			list_add_tail(&ep->ep.ep_list, &udc->gadget.ep_list);
-		ep->desc = NULL;
+		ep->ep.desc = NULL;
 		ep->stopped = 0;
 		ep->fifo_bank = 0;
 		ep->ep.maxpacket = ep->maxpacket;
@@ -978,18 +977,18 @@ static int at91_set_selfpowered(struct usb_gadget *gadget, int is_on)
 	return 0;
 }
 
-static int at91_start(struct usb_gadget_driver *driver,
-		int (*bind)(struct usb_gadget *));
-static int at91_stop(struct usb_gadget_driver *driver);
-
+static int at91_start(struct usb_gadget *gadget,
+		struct usb_gadget_driver *driver);
+static int at91_stop(struct usb_gadget *gadget,
+		struct usb_gadget_driver *driver);
 static const struct usb_gadget_ops at91_udc_ops = {
 	.get_frame		= at91_get_frame,
 	.wakeup			= at91_wakeup,
 	.set_selfpowered	= at91_set_selfpowered,
 	.vbus_session		= at91_vbus_session,
 	.pullup			= at91_pullup,
-	.start			= at91_start,
-	.stop			= at91_stop,
+	.udc_start		= at91_start,
+	.udc_stop		= at91_stop,
 
 	/*
 	 * VBUS-powered devices may also also want to support bigger
@@ -1172,7 +1171,7 @@ static void handle_setup(struct at91_udc *udc, struct at91_ep *ep, u32 csr)
 			| USB_REQ_GET_STATUS:
 		tmp = w_index & USB_ENDPOINT_NUMBER_MASK;
 		ep = &udc->ep[tmp];
-		if (tmp >= NUM_ENDPOINTS || (tmp && !ep->desc))
+		if (tmp >= NUM_ENDPOINTS || (tmp && !ep->ep.desc))
 			goto stall;
 
 		if (tmp) {
@@ -1197,7 +1196,7 @@ static void handle_setup(struct at91_udc *udc, struct at91_ep *ep, u32 csr)
 		ep = &udc->ep[tmp];
 		if (w_value != USB_ENDPOINT_HALT || tmp >= NUM_ENDPOINTS)
 			goto stall;
-		if (!ep->desc || ep->is_iso)
+		if (!ep->ep.desc || ep->is_iso)
 			goto stall;
 		if ((w_index & USB_DIR_IN)) {
 			if (!ep->is_in)
@@ -1218,7 +1217,7 @@ static void handle_setup(struct at91_udc *udc, struct at91_ep *ep, u32 csr)
 			goto stall;
 		if (tmp == 0)
 			goto succeed;
-		if (!ep->desc || ep->is_iso)
+		if (!ep->ep.desc || ep->is_iso)
 			goto stall;
 		if ((w_index & USB_DIR_IN)) {
 			if (!ep->is_in)
@@ -1627,66 +1626,34 @@ static void at91_vbus_timer(unsigned long data)
 		schedule_work(&udc->vbus_timer_work);
 }
 
-static int at91_start(struct usb_gadget_driver *driver,
-		int (*bind)(struct usb_gadget *))
+static int at91_start(struct usb_gadget *gadget,
+		struct usb_gadget_driver *driver)
 {
-	struct at91_udc	*udc = &controller;
-	int		retval;
-	unsigned long	flags;
-
-	if (!driver
-			|| driver->max_speed < USB_SPEED_FULL
-			|| !bind
-			|| !driver->setup) {
-		DBG("bad parameter.\n");
-		return -EINVAL;
-	}
-
-	if (udc->driver) {
-		DBG("UDC already has a gadget driver\n");
-		return -EBUSY;
-	}
+	struct at91_udc	*udc;
 
+	udc = container_of(gadget, struct at91_udc, gadget);
 	udc->driver = driver;
 	udc->gadget.dev.driver = &driver->driver;
 	dev_set_drvdata(&udc->gadget.dev, &driver->driver);
 	udc->enabled = 1;
 	udc->selfpowered = 1;
 
-	retval = bind(&udc->gadget);
-	if (retval) {
-		DBG("bind() returned %d\n", retval);
-		udc->driver = NULL;
-		udc->gadget.dev.driver = NULL;
-		dev_set_drvdata(&udc->gadget.dev, NULL);
-		udc->enabled = 0;
-		udc->selfpowered = 0;
-		return retval;
-	}
-
-	spin_lock_irqsave(&udc->lock, flags);
-	pullup(udc, 1);
-	spin_unlock_irqrestore(&udc->lock, flags);
-
 	DBG("bound to %s\n", driver->driver.name);
 	return 0;
 }
 
-static int at91_stop(struct usb_gadget_driver *driver)
+static int at91_stop(struct usb_gadget *gadget,
+		struct usb_gadget_driver *driver)
 {
-	struct at91_udc *udc = &controller;
+	struct at91_udc *udc;
 	unsigned long	flags;
 
-	if (!driver || driver != udc->driver || !driver->unbind)
-		return -EINVAL;
-
+	udc = container_of(gadget, struct at91_udc, gadget);
 	spin_lock_irqsave(&udc->lock, flags);
 	udc->enabled = 0;
 	at91_udp_write(udc, AT91_UDP_IDR, ~0);
-	pullup(udc, 0);
 	spin_unlock_irqrestore(&udc->lock, flags);
 
-	driver->unbind(&udc->gadget);
 	udc->gadget.dev.driver = NULL;
 	dev_set_drvdata(&udc->gadget.dev, NULL);
 	udc->driver = NULL;
diff --git a/drivers/usb/gadget/at91_udc.h b/drivers/usb/gadget/at91_udc.h
index 3c0315b86ac..e647d1c2ada 100644
--- a/drivers/usb/gadget/at91_udc.h
+++ b/drivers/usb/gadget/at91_udc.h
@@ -105,9 +105,6 @@ struct at91_ep {
 	unsigned			is_in:1;
 	unsigned			is_iso:1;
 	unsigned			fifo_bank:1;
-
-	const struct usb_endpoint_descriptor
-					*desc;
 };
 
 /*
diff --git a/drivers/usb/gadget/atmel_usba_udc.c b/drivers/usb/gadget/atmel_usba_udc.c
index 9f98508966d..e23bf7984aa 100644
--- a/drivers/usb/gadget/atmel_usba_udc.c
+++ b/drivers/usb/gadget/atmel_usba_udc.c
@@ -599,13 +599,13 @@ usba_ep_enable(struct usb_ep *_ep, const struct usb_endpoint_descriptor *desc)
 
 	spin_lock_irqsave(&ep->udc->lock, flags);
 
-	if (ep->desc) {
+	if (ep->ep.desc) {
 		spin_unlock_irqrestore(&ep->udc->lock, flags);
 		DBG(DBG_ERR, "ep%d already enabled\n", ep->index);
 		return -EBUSY;
 	}
 
-	ep->desc = desc;
+	ep->ep.desc = desc;
 	ep->ep.maxpacket = maxpacket;
 
 	usba_ep_writel(ep, CFG, ept_cfg);
@@ -647,7 +647,7 @@ static int usba_ep_disable(struct usb_ep *_ep)
 
 	spin_lock_irqsave(&udc->lock, flags);
 
-	if (!ep->desc) {
+	if (!ep->ep.desc) {
 		spin_unlock_irqrestore(&udc->lock, flags);
 		/* REVISIT because this driver disables endpoints in
 		 * reset_all_endpoints() before calling disconnect(),
@@ -658,7 +658,6 @@ static int usba_ep_disable(struct usb_ep *_ep)
 					ep->ep.name);
 		return -EINVAL;
 	}
-	ep->desc = NULL;
 	ep->ep.desc = NULL;
 
 	list_splice_init(&ep->queue, &req_list);
@@ -752,7 +751,7 @@ static int queue_dma(struct usba_udc *udc, struct usba_ep *ep,
 	 */
 	ret = -ESHUTDOWN;
 	spin_lock_irqsave(&udc->lock, flags);
-	if (ep->desc) {
+	if (ep->ep.desc) {
 		if (list_empty(&ep->queue))
 			submit_request(ep, req);
 
@@ -776,7 +775,8 @@ usba_ep_queue(struct usb_ep *_ep, struct usb_request *_req, gfp_t gfp_flags)
 	DBG(DBG_GADGET | DBG_QUEUE | DBG_REQ, "%s: queue req %p, len %u\n",
 			ep->ep.name, req, _req->length);
 
-	if (!udc->driver || udc->gadget.speed == USB_SPEED_UNKNOWN || !ep->desc)
+	if (!udc->driver || udc->gadget.speed == USB_SPEED_UNKNOWN ||
+	    !ep->ep.desc)
 		return -ESHUTDOWN;
 
 	req->submitted = 0;
@@ -792,7 +792,7 @@ usba_ep_queue(struct usb_ep *_ep, struct usb_request *_req, gfp_t gfp_flags)
 	/* May have received a reset since last time we checked */
 	ret = -ESHUTDOWN;
 	spin_lock_irqsave(&udc->lock, flags);
-	if (ep->desc) {
+	if (ep->ep.desc) {
 		list_add_tail(&req->queue, &ep->queue);
 
 		if ((!ep_is_control(ep) && ep->is_in) ||
@@ -905,7 +905,7 @@ static int usba_ep_set_halt(struct usb_ep *_ep, int value)
 	DBG(DBG_GADGET, "endpoint %s: %s HALT\n", ep->ep.name,
 			value ? "set" : "clear");
 
-	if (!ep->desc) {
+	if (!ep->ep.desc) {
 		DBG(DBG_ERR, "Attempted to halt uninitialized ep %s\n",
 				ep->ep.name);
 		return -ENODEV;
@@ -1008,16 +1008,16 @@ usba_udc_set_selfpowered(struct usb_gadget *gadget, int is_selfpowered)
 	return 0;
 }
 
-static int atmel_usba_start(struct usb_gadget_driver *driver,
-		int (*bind)(struct usb_gadget *));
-static int atmel_usba_stop(struct usb_gadget_driver *driver);
-
+static int atmel_usba_start(struct usb_gadget *gadget,
+		struct usb_gadget_driver *driver);
+static int atmel_usba_stop(struct usb_gadget *gadget,
+		struct usb_gadget_driver *driver);
 static const struct usb_gadget_ops usba_udc_ops = {
 	.get_frame		= usba_udc_get_frame,
 	.wakeup			= usba_udc_wakeup,
 	.set_selfpowered	= usba_udc_set_selfpowered,
-	.start			= atmel_usba_start,
-	.stop			= atmel_usba_stop,
+	.udc_start		= atmel_usba_start,
+	.udc_stop		= atmel_usba_stop,
 };
 
 static struct usb_endpoint_descriptor usba_ep0_desc = {
@@ -1071,7 +1071,7 @@ static void reset_all_endpoints(struct usba_udc *udc)
 	 * FIXME remove this code ... and retest thoroughly.
 	 */
 	list_for_each_entry(ep, &udc->gadget.ep_list, ep.ep_list) {
-		if (ep->desc) {
+		if (ep->ep.desc) {
 			spin_unlock(&udc->lock);
 			usba_ep_disable(&ep->ep);
 			spin_lock(&udc->lock);
@@ -1089,9 +1089,9 @@ static struct usba_ep *get_ep_by_addr(struct usba_udc *udc, u16 wIndex)
 	list_for_each_entry (ep, &udc->gadget.ep_list, ep.ep_list) {
 		u8 bEndpointAddress;
 
-		if (!ep->desc)
+		if (!ep->ep.desc)
 			continue;
-		bEndpointAddress = ep->desc->bEndpointAddress;
+		bEndpointAddress = ep->ep.desc->bEndpointAddress;
 		if ((wIndex ^ bEndpointAddress) & USB_DIR_IN)
 			continue;
 		if ((bEndpointAddress & USB_ENDPOINT_NUMBER_MASK)
@@ -1727,7 +1727,7 @@ static irqreturn_t usba_udc_irq(int irq, void *devid)
 		    usb_speed_string(udc->gadget.speed));
 
 		ep0 = &usba_ep[0];
-		ep0->desc = &usba_ep0_desc;
+		ep0->ep.desc = &usba_ep0_desc;
 		ep0->state = WAIT_FOR_SETUP;
 		usba_ep_writel(ep0, CFG,
 				(USBA_BF(EPT_SIZE, EP0_EPT_SIZE)
@@ -1795,21 +1795,13 @@ out:
 	return IRQ_HANDLED;
 }
 
-static int atmel_usba_start(struct usb_gadget_driver *driver,
-		int (*bind)(struct usb_gadget *))
+static int atmel_usba_start(struct usb_gadget *gadget,
+		struct usb_gadget_driver *driver)
 {
-	struct usba_udc *udc = &the_udc;
+	struct usba_udc *udc = container_of(gadget, struct usba_udc, gadget);
 	unsigned long flags;
-	int ret;
-
-	if (!udc->pdev)
-		return -ENODEV;
 
 	spin_lock_irqsave(&udc->lock, flags);
-	if (udc->driver) {
-		spin_unlock_irqrestore(&udc->lock, flags);
-		return -EBUSY;
-	}
 
 	udc->devstatus = 1 << USB_DEVICE_SELF_POWERED;
 	udc->driver = driver;
@@ -1819,13 +1811,6 @@ static int atmel_usba_start(struct usb_gadget_driver *driver,
 	clk_enable(udc->pclk);
 	clk_enable(udc->hclk);
 
-	ret = bind(&udc->gadget);
-	if (ret) {
-		DBG(DBG_ERR, "Could not bind to driver %s: error %d\n",
-			driver->driver.name, ret);
-		goto err_driver_bind;
-	}
-
 	DBG(DBG_GADGET, "registered driver `%s'\n", driver->driver.name);
 
 	udc->vbus_prev = 0;
@@ -1842,23 +1827,14 @@ static int atmel_usba_start(struct usb_gadget_driver *driver,
 	spin_unlock_irqrestore(&udc->lock, flags);
 
 	return 0;
-
-err_driver_bind:
-	udc->driver = NULL;
-	udc->gadget.dev.driver = NULL;
-	return ret;
 }
 
-static int atmel_usba_stop(struct usb_gadget_driver *driver)
+static int atmel_usba_stop(struct usb_gadget *gadget,
+		struct usb_gadget_driver *driver)
 {
-	struct usba_udc *udc = &the_udc;
+	struct usba_udc *udc = container_of(gadget, struct usba_udc, gadget);
 	unsigned long flags;
 
-	if (!udc->pdev)
-		return -ENODEV;
-	if (driver != udc->driver || !driver->unbind)
-		return -EINVAL;
-
 	if (gpio_is_valid(udc->vbus_pin))
 		disable_irq(gpio_to_irq(udc->vbus_pin));
 
@@ -1871,10 +1847,6 @@ static int atmel_usba_stop(struct usb_gadget_driver *driver)
 	toggle_bias(0);
 	usba_writel(udc, CTRL, USBA_DISABLE_MASK);
 
-	if (udc->driver->disconnect)
-		udc->driver->disconnect(&udc->gadget);
-
-	driver->unbind(&udc->gadget);
 	udc->gadget.dev.driver = NULL;
 	udc->driver = NULL;
 
diff --git a/drivers/usb/gadget/atmel_usba_udc.h b/drivers/usb/gadget/atmel_usba_udc.h
index 88a2e07a11a..9791259cbda 100644
--- a/drivers/usb/gadget/atmel_usba_udc.h
+++ b/drivers/usb/gadget/atmel_usba_udc.h
@@ -280,7 +280,6 @@ struct usba_ep {
 	struct usba_udc				*udc;
 
 	struct list_head			queue;
-	const struct usb_endpoint_descriptor	*desc;
 
 	u16					fifo_size;
 	u8					nr_banks;
diff --git a/drivers/usb/gadget/ci13xxx_pci.c b/drivers/usb/gadget/ci13xxx_pci.c
index 883ab5e832d..63ef96c04bb 100644
--- a/drivers/usb/gadget/ci13xxx_pci.c
+++ b/drivers/usb/gadget/ci13xxx_pci.c
@@ -148,27 +148,7 @@ static struct pci_driver ci13xxx_pci_driver = {
 	.remove       =	__devexit_p(ci13xxx_pci_remove),
 };
 
-/**
- * ci13xxx_pci_init: module init
- *
- * Driver load
- */
-static int __init ci13xxx_pci_init(void)
-{
-	return pci_register_driver(&ci13xxx_pci_driver);
-}
-module_init(ci13xxx_pci_init);
-
-/**
- * ci13xxx_pci_exit: module exit
- *
- * Driver unload
- */
-static void __exit ci13xxx_pci_exit(void)
-{
-	pci_unregister_driver(&ci13xxx_pci_driver);
-}
-module_exit(ci13xxx_pci_exit);
+module_pci_driver(ci13xxx_pci_driver);
 
 MODULE_AUTHOR("MIPS - David Lopo <dlopo@chipidea.mips.com>");
 MODULE_DESCRIPTION("MIPS CI13XXX USB Peripheral Controller");
diff --git a/drivers/usb/gadget/ci13xxx_udc.c b/drivers/usb/gadget/ci13xxx_udc.c
index 3ebc036b193..1a44bf9c374 100644
--- a/drivers/usb/gadget/ci13xxx_udc.c
+++ b/drivers/usb/gadget/ci13xxx_udc.c
@@ -1916,7 +1916,7 @@ __acquires(udc->lock)
 		int type, num, dir, err = -EINVAL;
 		struct usb_ctrlrequest req;
 
-		if (mEp->desc == NULL)
+		if (mEp->ep.desc == NULL)
 			continue;   /* not configured */
 
 		if (hw_test_and_clear_complete(i)) {
@@ -2112,7 +2112,7 @@ static int ep_enable(struct usb_ep *ep,
 
 	/* only internal SW should enable ctrl endpts */
 
-	mEp->desc = desc;
+	mEp->ep.desc = desc;
 
 	if (!list_empty(&mEp->qh.queue))
 		warn("enabling a non-empty endpoint!");
@@ -2164,7 +2164,7 @@ static int ep_disable(struct usb_ep *ep)
 
 	if (ep == NULL)
 		return -EINVAL;
-	else if (mEp->desc == NULL)
+	else if (mEp->ep.desc == NULL)
 		return -EBUSY;
 
 	spin_lock_irqsave(mEp->lock, flags);
@@ -2183,7 +2183,6 @@ static int ep_disable(struct usb_ep *ep)
 
 	} while (mEp->dir != direction);
 
-	mEp->desc = NULL;
 	mEp->ep.desc = NULL;
 
 	spin_unlock_irqrestore(mEp->lock, flags);
@@ -2272,7 +2271,7 @@ static int ep_queue(struct usb_ep *ep, struct usb_request *req,
 
 	trace("%p, %p, %X", ep, req, gfp_flags);
 
-	if (ep == NULL || req == NULL || mEp->desc == NULL)
+	if (ep == NULL || req == NULL || mEp->ep.desc == NULL)
 		return -EINVAL;
 
 	spin_lock_irqsave(mEp->lock, flags);
@@ -2335,7 +2334,7 @@ static int ep_dequeue(struct usb_ep *ep, struct usb_request *req)
 	trace("%p, %p", ep, req);
 
 	if (ep == NULL || req == NULL || mReq->req.status != -EALREADY ||
-		mEp->desc == NULL || list_empty(&mReq->queue) ||
+		mEp->ep.desc == NULL || list_empty(&mReq->queue) ||
 		list_empty(&mEp->qh.queue))
 		return -EINVAL;
 
@@ -2378,7 +2377,7 @@ static int ep_set_halt(struct usb_ep *ep, int value)
 
 	trace("%p, %i", ep, value);
 
-	if (ep == NULL || mEp->desc == NULL)
+	if (ep == NULL || mEp->ep.desc == NULL)
 		return -EINVAL;
 
 	spin_lock_irqsave(mEp->lock, flags);
@@ -2421,7 +2420,7 @@ static int ep_set_wedge(struct usb_ep *ep)
 
 	trace("%p", ep);
 
-	if (ep == NULL || mEp->desc == NULL)
+	if (ep == NULL || mEp->ep.desc == NULL)
 		return -EINVAL;
 
 	spin_lock_irqsave(mEp->lock, flags);
diff --git a/drivers/usb/gadget/ci13xxx_udc.h b/drivers/usb/gadget/ci13xxx_udc.h
index c4cec6a43d5..6490cf872ad 100644
--- a/drivers/usb/gadget/ci13xxx_udc.h
+++ b/drivers/usb/gadget/ci13xxx_udc.h
@@ -82,7 +82,6 @@ struct ci13xxx_req {
 /* Extension of usb_ep */
 struct ci13xxx_ep {
 	struct usb_ep                          ep;
-	const struct usb_endpoint_descriptor  *desc;
 	u8                                     dir;
 	u8                                     num;
 	u8                                     type;
diff --git a/drivers/usb/gadget/composite.c b/drivers/usb/gadget/composite.c
index baaebf2830f..a3b19fe37f5 100644
--- a/drivers/usb/gadget/composite.c
+++ b/drivers/usb/gadget/composite.c
@@ -737,6 +737,19 @@ int usb_add_config(struct usb_composite_dev *cdev,
 
 	status = bind(config);
 	if (status < 0) {
+		while (!list_empty(&config->functions)) {
+			struct usb_function		*f;
+
+			f = list_first_entry(&config->functions,
+					struct usb_function, list);
+			list_del(&f->list);
+			if (f->unbind) {
+				DBG(cdev, "unbind function '%s'/%p\n",
+					f->name, f);
+				f->unbind(config, f);
+				/* may free memory for "f" */
+			}
+		}
 		list_del(&config->list);
 		config->cdev = NULL;
 	} else {
@@ -785,7 +798,7 @@ done:
 static void collect_langs(struct usb_gadget_strings **sp, __le16 *buf)
 {
 	const struct usb_gadget_strings	*s;
-	u16				language;
+	__le16				language;
 	__le16				*tmp;
 
 	while (*sp) {
diff --git a/drivers/usb/gadget/dummy_hcd.c b/drivers/usb/gadget/dummy_hcd.c
index 170cbe89d9f..83bb2e3fa86 100644
--- a/drivers/usb/gadget/dummy_hcd.c
+++ b/drivers/usb/gadget/dummy_hcd.c
@@ -595,14 +595,12 @@ static struct usb_request *dummy_alloc_request(struct usb_ep *_ep,
 
 static void dummy_free_request(struct usb_ep *_ep, struct usb_request *_req)
 {
-	struct dummy_ep		*ep;
 	struct dummy_request	*req;
 
-	if (!_ep || !_req)
-		return;
-	ep = usb_ep_to_dummy_ep(_ep);
-	if (!ep->desc && _ep->name != ep0name)
+	if (!_ep || !_req) {
+		__WARN();
 		return;
+	}
 
 	req = usb_request_to_dummy_request(_req);
 	WARN_ON(!list_empty(&req->queue));
diff --git a/drivers/usb/gadget/f_fs.c b/drivers/usb/gadget/f_fs.c
index f52cb1ae45d..1d4c535671a 100644
--- a/drivers/usb/gadget/f_fs.c
+++ b/drivers/usb/gadget/f_fs.c
@@ -1473,8 +1473,22 @@ static int functionfs_bind_config(struct usb_composite_dev *cdev,
 
 static void ffs_func_free(struct ffs_function *func)
 {
+	struct ffs_ep *ep         = func->eps;
+	unsigned count            = func->ffs->eps_count;
+	unsigned long flags;
+
 	ENTER();
 
+	/* cleanup after autoconfig */
+	spin_lock_irqsave(&func->ffs->eps_lock, flags);
+	do {
+		if (ep->ep && ep->req)
+			usb_ep_free_request(ep->ep, ep->req);
+		ep->req = NULL;
+		++ep;
+	} while (--count);
+	spin_unlock_irqrestore(&func->ffs->eps_lock, flags);
+
 	ffs_data_put(func->ffs);
 
 	kfree(func->eps);
diff --git a/drivers/usb/gadget/f_loopback.c b/drivers/usb/gadget/f_loopback.c
index 2c0cd824c66..7275706caeb 100644
--- a/drivers/usb/gadget/f_loopback.c
+++ b/drivers/usb/gadget/f_loopback.c
@@ -286,7 +286,7 @@ static void disable_loopback(struct f_loopback *loop)
 	struct usb_composite_dev	*cdev;
 
 	cdev = loop->function.config->cdev;
-	disable_endpoints(cdev, loop->in_ep, loop->out_ep);
+	disable_endpoints(cdev, loop->in_ep, loop->out_ep, NULL, NULL);
 	VDBG(cdev, "%s disabled\n", loop->function.name);
 }
 
@@ -329,7 +329,7 @@ fail0:
 	 * than 'buflen' bytes each.
 	 */
 	for (i = 0; i < qlen && result == 0; i++) {
-		req = alloc_ep_req(ep);
+		req = alloc_ep_req(ep, 0);
 		if (req) {
 			req->complete = loopback_complete;
 			result = usb_ep_queue(ep, req, GFP_ATOMIC);
diff --git a/drivers/usb/gadget/f_mass_storage.c b/drivers/usb/gadget/f_mass_storage.c
index cb8c162cae5..f67b453740b 100644
--- a/drivers/usb/gadget/f_mass_storage.c
+++ b/drivers/usb/gadget/f_mass_storage.c
@@ -3110,13 +3110,6 @@ static int fsg_bind_config(struct usb_composite_dev *cdev,
 	return rc;
 }
 
-static inline int __deprecated __maybe_unused
-fsg_add(struct usb_composite_dev *cdev, struct usb_configuration *c,
-	struct fsg_common *common)
-{
-	return fsg_bind_config(cdev, c, common);
-}
-
 
 /************************* Module parameters *************************/
 
diff --git a/drivers/usb/gadget/f_sourcesink.c b/drivers/usb/gadget/f_sourcesink.c
index 7aa7ac82c02..5c1b68b63c9 100644
--- a/drivers/usb/gadget/f_sourcesink.c
+++ b/drivers/usb/gadget/f_sourcesink.c
@@ -51,6 +51,9 @@ struct f_sourcesink {
 
 	struct usb_ep		*in_ep;
 	struct usb_ep		*out_ep;
+	struct usb_ep		*iso_in_ep;
+	struct usb_ep		*iso_out_ep;
+	int			cur_alt;
 };
 
 static inline struct f_sourcesink *func_to_ss(struct usb_function *f)
@@ -59,18 +62,45 @@ static inline struct f_sourcesink *func_to_ss(struct usb_function *f)
 }
 
 static unsigned pattern;
-module_param(pattern, uint, 0);
-MODULE_PARM_DESC(pattern, "0 = all zeroes, 1 = mod63 ");
+module_param(pattern, uint, S_IRUGO|S_IWUSR);
+MODULE_PARM_DESC(pattern, "0 = all zeroes, 1 = mod63, 2 = none");
+
+static unsigned isoc_interval = 4;
+module_param(isoc_interval, uint, S_IRUGO|S_IWUSR);
+MODULE_PARM_DESC(isoc_interval, "1 - 16");
+
+static unsigned isoc_maxpacket = 1024;
+module_param(isoc_maxpacket, uint, S_IRUGO|S_IWUSR);
+MODULE_PARM_DESC(isoc_maxpacket, "0 - 1023 (fs), 0 - 1024 (hs/ss)");
+
+static unsigned isoc_mult;
+module_param(isoc_mult, uint, S_IRUGO|S_IWUSR);
+MODULE_PARM_DESC(isoc_mult, "0 - 2 (hs/ss only)");
+
+static unsigned isoc_maxburst;
+module_param(isoc_maxburst, uint, S_IRUGO|S_IWUSR);
+MODULE_PARM_DESC(isoc_maxburst, "0 - 15 (ss only)");
 
 /*-------------------------------------------------------------------------*/
 
-static struct usb_interface_descriptor source_sink_intf = {
-	.bLength =		sizeof source_sink_intf,
+static struct usb_interface_descriptor source_sink_intf_alt0 = {
+	.bLength =		USB_DT_INTERFACE_SIZE,
 	.bDescriptorType =	USB_DT_INTERFACE,
 
+	.bAlternateSetting =	0,
 	.bNumEndpoints =	2,
 	.bInterfaceClass =	USB_CLASS_VENDOR_SPEC,
-	/* .iInterface = DYNAMIC */
+	/* .iInterface		= DYNAMIC */
+};
+
+static struct usb_interface_descriptor source_sink_intf_alt1 = {
+	.bLength =		USB_DT_INTERFACE_SIZE,
+	.bDescriptorType =	USB_DT_INTERFACE,
+
+	.bAlternateSetting =	1,
+	.bNumEndpoints =	4,
+	.bInterfaceClass =	USB_CLASS_VENDOR_SPEC,
+	/* .iInterface		= DYNAMIC */
 };
 
 /* full speed support: */
@@ -91,10 +121,36 @@ static struct usb_endpoint_descriptor fs_sink_desc = {
 	.bmAttributes =		USB_ENDPOINT_XFER_BULK,
 };
 
+static struct usb_endpoint_descriptor fs_iso_source_desc = {
+	.bLength =		USB_DT_ENDPOINT_SIZE,
+	.bDescriptorType =	USB_DT_ENDPOINT,
+
+	.bEndpointAddress =	USB_DIR_IN,
+	.bmAttributes =		USB_ENDPOINT_XFER_ISOC,
+	.wMaxPacketSize =	cpu_to_le16(1023),
+	.bInterval =		4,
+};
+
+static struct usb_endpoint_descriptor fs_iso_sink_desc = {
+	.bLength =		USB_DT_ENDPOINT_SIZE,
+	.bDescriptorType =	USB_DT_ENDPOINT,
+
+	.bEndpointAddress =	USB_DIR_OUT,
+	.bmAttributes =		USB_ENDPOINT_XFER_ISOC,
+	.wMaxPacketSize =	cpu_to_le16(1023),
+	.bInterval =		4,
+};
+
 static struct usb_descriptor_header *fs_source_sink_descs[] = {
-	(struct usb_descriptor_header *) &source_sink_intf,
+	(struct usb_descriptor_header *) &source_sink_intf_alt0,
 	(struct usb_descriptor_header *) &fs_sink_desc,
 	(struct usb_descriptor_header *) &fs_source_desc,
+	(struct usb_descriptor_header *) &source_sink_intf_alt1,
+#define FS_ALT_IFC_1_OFFSET	3
+	(struct usb_descriptor_header *) &fs_sink_desc,
+	(struct usb_descriptor_header *) &fs_source_desc,
+	(struct usb_descriptor_header *) &fs_iso_sink_desc,
+	(struct usb_descriptor_header *) &fs_iso_source_desc,
 	NULL,
 };
 
@@ -116,10 +172,34 @@ static struct usb_endpoint_descriptor hs_sink_desc = {
 	.wMaxPacketSize =	cpu_to_le16(512),
 };
 
+static struct usb_endpoint_descriptor hs_iso_source_desc = {
+	.bLength =		USB_DT_ENDPOINT_SIZE,
+	.bDescriptorType =	USB_DT_ENDPOINT,
+
+	.bmAttributes =		USB_ENDPOINT_XFER_ISOC,
+	.wMaxPacketSize =	cpu_to_le16(1024),
+	.bInterval =		4,
+};
+
+static struct usb_endpoint_descriptor hs_iso_sink_desc = {
+	.bLength =		USB_DT_ENDPOINT_SIZE,
+	.bDescriptorType =	USB_DT_ENDPOINT,
+
+	.bmAttributes =		USB_ENDPOINT_XFER_ISOC,
+	.wMaxPacketSize =	cpu_to_le16(1024),
+	.bInterval =		4,
+};
+
 static struct usb_descriptor_header *hs_source_sink_descs[] = {
-	(struct usb_descriptor_header *) &source_sink_intf,
+	(struct usb_descriptor_header *) &source_sink_intf_alt0,
 	(struct usb_descriptor_header *) &hs_source_desc,
 	(struct usb_descriptor_header *) &hs_sink_desc,
+	(struct usb_descriptor_header *) &source_sink_intf_alt1,
+#define HS_ALT_IFC_1_OFFSET	3
+	(struct usb_descriptor_header *) &hs_source_desc,
+	(struct usb_descriptor_header *) &hs_sink_desc,
+	(struct usb_descriptor_header *) &hs_iso_source_desc,
+	(struct usb_descriptor_header *) &hs_iso_sink_desc,
 	NULL,
 };
 
@@ -136,6 +216,7 @@ static struct usb_endpoint_descriptor ss_source_desc = {
 struct usb_ss_ep_comp_descriptor ss_source_comp_desc = {
 	.bLength =		USB_DT_SS_EP_COMP_SIZE,
 	.bDescriptorType =	USB_DT_SS_ENDPOINT_COMP,
+
 	.bMaxBurst =		0,
 	.bmAttributes =		0,
 	.wBytesPerInterval =	0,
@@ -152,17 +233,64 @@ static struct usb_endpoint_descriptor ss_sink_desc = {
 struct usb_ss_ep_comp_descriptor ss_sink_comp_desc = {
 	.bLength =		USB_DT_SS_EP_COMP_SIZE,
 	.bDescriptorType =	USB_DT_SS_ENDPOINT_COMP,
+
 	.bMaxBurst =		0,
 	.bmAttributes =		0,
 	.wBytesPerInterval =	0,
 };
 
+static struct usb_endpoint_descriptor ss_iso_source_desc = {
+	.bLength =		USB_DT_ENDPOINT_SIZE,
+	.bDescriptorType =	USB_DT_ENDPOINT,
+
+	.bmAttributes =		USB_ENDPOINT_XFER_ISOC,
+	.wMaxPacketSize =	cpu_to_le16(1024),
+	.bInterval =		4,
+};
+
+struct usb_ss_ep_comp_descriptor ss_iso_source_comp_desc = {
+	.bLength =		USB_DT_SS_EP_COMP_SIZE,
+	.bDescriptorType =	USB_DT_SS_ENDPOINT_COMP,
+
+	.bMaxBurst =		0,
+	.bmAttributes =		0,
+	.wBytesPerInterval =	cpu_to_le16(1024),
+};
+
+static struct usb_endpoint_descriptor ss_iso_sink_desc = {
+	.bLength =		USB_DT_ENDPOINT_SIZE,
+	.bDescriptorType =	USB_DT_ENDPOINT,
+
+	.bmAttributes =		USB_ENDPOINT_XFER_ISOC,
+	.wMaxPacketSize =	cpu_to_le16(1024),
+	.bInterval =		4,
+};
+
+struct usb_ss_ep_comp_descriptor ss_iso_sink_comp_desc = {
+	.bLength =		USB_DT_SS_EP_COMP_SIZE,
+	.bDescriptorType =	USB_DT_SS_ENDPOINT_COMP,
+
+	.bMaxBurst =		0,
+	.bmAttributes =		0,
+	.wBytesPerInterval =	cpu_to_le16(1024),
+};
+
 static struct usb_descriptor_header *ss_source_sink_descs[] = {
-	(struct usb_descriptor_header *) &source_sink_intf,
+	(struct usb_descriptor_header *) &source_sink_intf_alt0,
 	(struct usb_descriptor_header *) &ss_source_desc,
 	(struct usb_descriptor_header *) &ss_source_comp_desc,
 	(struct usb_descriptor_header *) &ss_sink_desc,
 	(struct usb_descriptor_header *) &ss_sink_comp_desc,
+	(struct usb_descriptor_header *) &source_sink_intf_alt1,
+#define SS_ALT_IFC_1_OFFSET	5
+	(struct usb_descriptor_header *) &ss_source_desc,
+	(struct usb_descriptor_header *) &ss_source_comp_desc,
+	(struct usb_descriptor_header *) &ss_sink_desc,
+	(struct usb_descriptor_header *) &ss_sink_comp_desc,
+	(struct usb_descriptor_header *) &ss_iso_source_desc,
+	(struct usb_descriptor_header *) &ss_iso_source_comp_desc,
+	(struct usb_descriptor_header *) &ss_iso_sink_desc,
+	(struct usb_descriptor_header *) &ss_iso_sink_comp_desc,
 	NULL,
 };
 
@@ -196,9 +324,10 @@ sourcesink_bind(struct usb_configuration *c, struct usb_function *f)
 	id = usb_interface_id(c, f);
 	if (id < 0)
 		return id;
-	source_sink_intf.bInterfaceNumber = id;
+	source_sink_intf_alt0.bInterfaceNumber = id;
+	source_sink_intf_alt1.bInterfaceNumber = id;
 
-	/* allocate endpoints */
+	/* allocate bulk endpoints */
 	ss->in_ep = usb_ep_autoconfig(cdev->gadget, &fs_source_desc);
 	if (!ss->in_ep) {
 autoconf_fail:
@@ -213,12 +342,74 @@ autoconf_fail:
 		goto autoconf_fail;
 	ss->out_ep->driver_data = cdev;	/* claim */
 
+	/* sanity check the isoc module parameters */
+	if (isoc_interval < 1)
+		isoc_interval = 1;
+	if (isoc_interval > 16)
+		isoc_interval = 16;
+	if (isoc_mult > 2)
+		isoc_mult = 2;
+	if (isoc_maxburst > 15)
+		isoc_maxburst = 15;
+
+	/* fill in the FS isoc descriptors from the module parameters */
+	fs_iso_source_desc.wMaxPacketSize = isoc_maxpacket > 1023 ?
+						1023 : isoc_maxpacket;
+	fs_iso_source_desc.bInterval = isoc_interval;
+	fs_iso_sink_desc.wMaxPacketSize = isoc_maxpacket > 1023 ?
+						1023 : isoc_maxpacket;
+	fs_iso_sink_desc.bInterval = isoc_interval;
+
+	/* allocate iso endpoints */
+	ss->iso_in_ep = usb_ep_autoconfig(cdev->gadget, &fs_iso_source_desc);
+	if (!ss->iso_in_ep)
+		goto no_iso;
+	ss->iso_in_ep->driver_data = cdev;	/* claim */
+
+	ss->iso_out_ep = usb_ep_autoconfig(cdev->gadget, &fs_iso_sink_desc);
+	if (ss->iso_out_ep) {
+		ss->iso_out_ep->driver_data = cdev;	/* claim */
+	} else {
+		ss->iso_in_ep->driver_data = NULL;
+		ss->iso_in_ep = NULL;
+no_iso:
+		/*
+		 * We still want to work even if the UDC doesn't have isoc
+		 * endpoints, so null out the alt interface that contains
+		 * them and continue.
+		 */
+		fs_source_sink_descs[FS_ALT_IFC_1_OFFSET] = NULL;
+		hs_source_sink_descs[HS_ALT_IFC_1_OFFSET] = NULL;
+		ss_source_sink_descs[SS_ALT_IFC_1_OFFSET] = NULL;
+	}
+
+	if (isoc_maxpacket > 1024)
+		isoc_maxpacket = 1024;
+
 	/* support high speed hardware */
 	if (gadget_is_dualspeed(c->cdev->gadget)) {
 		hs_source_desc.bEndpointAddress =
 				fs_source_desc.bEndpointAddress;
 		hs_sink_desc.bEndpointAddress =
 				fs_sink_desc.bEndpointAddress;
+
+		/*
+		 * Fill in the HS isoc descriptors from the module parameters.
+		 * We assume that the user knows what they are doing and won't
+		 * give parameters that their UDC doesn't support.
+		 */
+		hs_iso_source_desc.wMaxPacketSize = isoc_maxpacket;
+		hs_iso_source_desc.wMaxPacketSize |= isoc_mult << 11;
+		hs_iso_source_desc.bInterval = isoc_interval;
+		hs_iso_source_desc.bEndpointAddress =
+				fs_iso_source_desc.bEndpointAddress;
+
+		hs_iso_sink_desc.wMaxPacketSize = isoc_maxpacket;
+		hs_iso_sink_desc.wMaxPacketSize |= isoc_mult << 11;
+		hs_iso_sink_desc.bInterval = isoc_interval;
+		hs_iso_sink_desc.bEndpointAddress =
+				fs_iso_sink_desc.bEndpointAddress;
+
 		f->hs_descriptors = hs_source_sink_descs;
 	}
 
@@ -228,13 +419,39 @@ autoconf_fail:
 				fs_source_desc.bEndpointAddress;
 		ss_sink_desc.bEndpointAddress =
 				fs_sink_desc.bEndpointAddress;
+
+		/*
+		 * Fill in the SS isoc descriptors from the module parameters.
+		 * We assume that the user knows what they are doing and won't
+		 * give parameters that their UDC doesn't support.
+		 */
+		ss_iso_source_desc.wMaxPacketSize = isoc_maxpacket;
+		ss_iso_source_desc.bInterval = isoc_interval;
+		ss_iso_source_comp_desc.bmAttributes = isoc_mult;
+		ss_iso_source_comp_desc.bMaxBurst = isoc_maxburst;
+		ss_iso_source_comp_desc.wBytesPerInterval =
+			isoc_maxpacket * (isoc_mult + 1) * (isoc_maxburst + 1);
+		ss_iso_source_desc.bEndpointAddress =
+				fs_iso_source_desc.bEndpointAddress;
+
+		ss_iso_sink_desc.wMaxPacketSize = isoc_maxpacket;
+		ss_iso_sink_desc.bInterval = isoc_interval;
+		ss_iso_sink_comp_desc.bmAttributes = isoc_mult;
+		ss_iso_sink_comp_desc.bMaxBurst = isoc_maxburst;
+		ss_iso_sink_comp_desc.wBytesPerInterval =
+			isoc_maxpacket * (isoc_mult + 1) * (isoc_maxburst + 1);
+		ss_iso_sink_desc.bEndpointAddress =
+				fs_iso_sink_desc.bEndpointAddress;
+
 		f->ss_descriptors = ss_source_sink_descs;
 	}
 
-	DBG(cdev, "%s speed %s: IN/%s, OUT/%s\n",
+	DBG(cdev, "%s speed %s: IN/%s, OUT/%s, ISO-IN/%s, ISO-OUT/%s\n",
 	    (gadget_is_superspeed(c->cdev->gadget) ? "super" :
 	     (gadget_is_dualspeed(c->cdev->gadget) ? "dual" : "full")),
-			f->name, ss->in_ep->name, ss->out_ep->name);
+			f->name, ss->in_ep->name, ss->out_ep->name,
+			ss->iso_in_ep ? ss->iso_in_ep->name : "<none>",
+			ss->iso_out_ep ? ss->iso_out_ep->name : "<none>");
 	return 0;
 }
 
@@ -251,6 +468,9 @@ static int check_read_data(struct f_sourcesink *ss, struct usb_request *req)
 	u8			*buf = req->buf;
 	struct usb_composite_dev *cdev = ss->function.config->cdev;
 
+	if (pattern == 2)
+		return 0;
+
 	for (i = 0; i < req->actual; i++, buf++) {
 		switch (pattern) {
 
@@ -265,7 +485,7 @@ static int check_read_data(struct f_sourcesink *ss, struct usb_request *req)
 		 * each usb transfer request should be.  Resync is done
 		 * with set_interface or set_config.  (We *WANT* it to
 		 * get quickly out of sync if controllers or their drivers
-		 * stutter for any reason, including buffer duplcation...)
+		 * stutter for any reason, including buffer duplication...)
 		 */
 		case 1:
 			if (*buf == (u8)(i % 63))
@@ -292,21 +512,30 @@ static void reinit_write_data(struct usb_ep *ep, struct usb_request *req)
 		for  (i = 0; i < req->length; i++)
 			*buf++ = (u8) (i % 63);
 		break;
+	case 2:
+		break;
 	}
 }
 
 static void source_sink_complete(struct usb_ep *ep, struct usb_request *req)
 {
-	struct f_sourcesink	*ss = ep->driver_data;
-	struct usb_composite_dev *cdev = ss->function.config->cdev;
-	int			status = req->status;
+	struct usb_composite_dev	*cdev;
+	struct f_sourcesink		*ss = ep->driver_data;
+	int				status = req->status;
+
+	/* driver_data will be null if ep has been disabled */
+	if (!ss)
+		return;
+
+	cdev = ss->function.config->cdev;
 
 	switch (status) {
 
 	case 0:				/* normal completion? */
 		if (ep == ss->out_ep) {
 			check_read_data(ss, req);
-			memset(req->buf, 0x55, req->length);
+			if (pattern != 2)
+				memset(req->buf, 0x55, req->length);
 		} else
 			reinit_write_data(ep, req);
 		break;
@@ -344,32 +573,57 @@ static void source_sink_complete(struct usb_ep *ep, struct usb_request *req)
 	}
 }
 
-static int source_sink_start_ep(struct f_sourcesink *ss, bool is_in)
+static int source_sink_start_ep(struct f_sourcesink *ss, bool is_in,
+		bool is_iso, int speed)
 {
 	struct usb_ep		*ep;
 	struct usb_request	*req;
-	int			status;
+	int			i, size, status;
+
+	for (i = 0; i < 8; i++) {
+		if (is_iso) {
+			switch (speed) {
+			case USB_SPEED_SUPER:
+				size = isoc_maxpacket * (isoc_mult + 1) *
+						(isoc_maxburst + 1);
+				break;
+			case USB_SPEED_HIGH:
+				size = isoc_maxpacket * (isoc_mult + 1);
+				break;
+			default:
+				size = isoc_maxpacket > 1023 ?
+						1023 : isoc_maxpacket;
+				break;
+			}
+			ep = is_in ? ss->iso_in_ep : ss->iso_out_ep;
+			req = alloc_ep_req(ep, size);
+		} else {
+			ep = is_in ? ss->in_ep : ss->out_ep;
+			req = alloc_ep_req(ep, 0);
+		}
 
-	ep = is_in ? ss->in_ep : ss->out_ep;
-	req = alloc_ep_req(ep);
-	if (!req)
-		return -ENOMEM;
+		if (!req)
+			return -ENOMEM;
 
-	req->complete = source_sink_complete;
-	if (is_in)
-		reinit_write_data(ep, req);
-	else
-		memset(req->buf, 0x55, req->length);
+		req->complete = source_sink_complete;
+		if (is_in)
+			reinit_write_data(ep, req);
+		else if (pattern != 2)
+			memset(req->buf, 0x55, req->length);
 
-	status = usb_ep_queue(ep, req, GFP_ATOMIC);
-	if (status) {
-		struct usb_composite_dev	*cdev;
+		status = usb_ep_queue(ep, req, GFP_ATOMIC);
+		if (status) {
+			struct usb_composite_dev	*cdev;
 
-		cdev = ss->function.config->cdev;
-		ERROR(cdev, "start %s %s --> %d\n",
-				is_in ? "IN" : "OUT",
-				ep->name, status);
-		free_ep_req(ep, req);
+			cdev = ss->function.config->cdev;
+			ERROR(cdev, "start %s%s %s --> %d\n",
+			      is_iso ? "ISO-" : "", is_in ? "IN" : "OUT",
+			      ep->name, status);
+			free_ep_req(ep, req);
+		}
+
+		if (!is_iso)
+			break;
 	}
 
 	return status;
@@ -380,17 +634,20 @@ static void disable_source_sink(struct f_sourcesink *ss)
 	struct usb_composite_dev	*cdev;
 
 	cdev = ss->function.config->cdev;
-	disable_endpoints(cdev, ss->in_ep, ss->out_ep);
+	disable_endpoints(cdev, ss->in_ep, ss->out_ep, ss->iso_in_ep,
+			ss->iso_out_ep);
 	VDBG(cdev, "%s disabled\n", ss->function.name);
 }
 
 static int
-enable_source_sink(struct usb_composite_dev *cdev, struct f_sourcesink *ss)
+enable_source_sink(struct usb_composite_dev *cdev, struct f_sourcesink *ss,
+		int alt)
 {
 	int					result = 0;
+	int					speed = cdev->gadget->speed;
 	struct usb_ep				*ep;
 
-	/* one endpoint writes (sources) zeroes IN (to the host) */
+	/* one bulk endpoint writes (sources) zeroes IN (to the host) */
 	ep = ss->in_ep;
 	result = config_ep_by_speed(cdev->gadget, &(ss->function), ep);
 	if (result)
@@ -400,7 +657,7 @@ enable_source_sink(struct usb_composite_dev *cdev, struct f_sourcesink *ss)
 		return result;
 	ep->driver_data = ss;
 
-	result = source_sink_start_ep(ss, true);
+	result = source_sink_start_ep(ss, true, false, speed);
 	if (result < 0) {
 fail:
 		ep = ss->in_ep;
@@ -409,7 +666,7 @@ fail:
 		return result;
 	}
 
-	/* one endpoint reads (sinks) anything OUT (from the host) */
+	/* one bulk endpoint reads (sinks) anything OUT (from the host) */
 	ep = ss->out_ep;
 	result = config_ep_by_speed(cdev->gadget, &(ss->function), ep);
 	if (result)
@@ -419,27 +676,82 @@ fail:
 		goto fail;
 	ep->driver_data = ss;
 
-	result = source_sink_start_ep(ss, false);
+	result = source_sink_start_ep(ss, false, false, speed);
 	if (result < 0) {
+fail2:
+		ep = ss->out_ep;
 		usb_ep_disable(ep);
 		ep->driver_data = NULL;
 		goto fail;
 	}
 
-	DBG(cdev, "%s enabled\n", ss->function.name);
+	if (alt == 0)
+		goto out;
+
+	/* one iso endpoint writes (sources) zeroes IN (to the host) */
+	ep = ss->iso_in_ep;
+	if (ep) {
+		result = config_ep_by_speed(cdev->gadget, &(ss->function), ep);
+		if (result)
+			goto fail2;
+		result = usb_ep_enable(ep);
+		if (result < 0)
+			goto fail2;
+		ep->driver_data = ss;
+
+		result = source_sink_start_ep(ss, true, true, speed);
+		if (result < 0) {
+fail3:
+			ep = ss->iso_in_ep;
+			if (ep) {
+				usb_ep_disable(ep);
+				ep->driver_data = NULL;
+			}
+			goto fail2;
+		}
+	}
+
+	/* one iso endpoint reads (sinks) anything OUT (from the host) */
+	ep = ss->iso_out_ep;
+	if (ep) {
+		result = config_ep_by_speed(cdev->gadget, &(ss->function), ep);
+		if (result)
+			goto fail3;
+		result = usb_ep_enable(ep);
+		if (result < 0)
+			goto fail3;
+		ep->driver_data = ss;
+
+		result = source_sink_start_ep(ss, false, true, speed);
+		if (result < 0) {
+			usb_ep_disable(ep);
+			ep->driver_data = NULL;
+			goto fail3;
+		}
+	}
+out:
+	ss->cur_alt = alt;
+
+	DBG(cdev, "%s enabled, alt intf %d\n", ss->function.name, alt);
 	return result;
 }
 
 static int sourcesink_set_alt(struct usb_function *f,
 		unsigned intf, unsigned alt)
 {
-	struct f_sourcesink	*ss = func_to_ss(f);
-	struct usb_composite_dev *cdev = f->config->cdev;
+	struct f_sourcesink		*ss = func_to_ss(f);
+	struct usb_composite_dev	*cdev = f->config->cdev;
 
-	/* we know alt is zero */
 	if (ss->in_ep->driver_data)
 		disable_source_sink(ss);
-	return enable_source_sink(cdev, ss);
+	return enable_source_sink(cdev, ss, alt);
+}
+
+static int sourcesink_get_alt(struct usb_function *f, unsigned intf)
+{
+	struct f_sourcesink		*ss = func_to_ss(f);
+
+	return ss->cur_alt;
 }
 
 static void sourcesink_disable(struct usb_function *f)
@@ -465,6 +777,7 @@ static int __init sourcesink_bind_config(struct usb_configuration *c)
 	ss->function.bind = sourcesink_bind;
 	ss->function.unbind = sourcesink_unbind;
 	ss->function.set_alt = sourcesink_set_alt;
+	ss->function.get_alt = sourcesink_get_alt;
 	ss->function.disable = sourcesink_disable;
 
 	status = usb_add_function(c, &ss->function);
@@ -536,7 +849,7 @@ unknown:
 		req->length = value;
 		value = usb_ep_queue(c->cdev->gadget->ep0, req, GFP_ATOMIC);
 		if (value < 0)
-			ERROR(c->cdev, "source/sinkc response, err %d\n",
+			ERROR(c->cdev, "source/sink response, err %d\n",
 					value);
 	}
 
@@ -545,12 +858,12 @@ unknown:
 }
 
 static struct usb_configuration sourcesink_driver = {
-	.label		= "source/sink",
-	.strings	= sourcesink_strings,
-	.setup		= sourcesink_setup,
-	.bConfigurationValue = 3,
-	.bmAttributes	= USB_CONFIG_ATT_SELFPOWER,
-	/* .iConfiguration = DYNAMIC */
+	.label			= "source/sink",
+	.strings		= sourcesink_strings,
+	.setup			= sourcesink_setup,
+	.bConfigurationValue	= 3,
+	.bmAttributes		= USB_CONFIG_ATT_SELFPOWER,
+	/* .iConfiguration	= DYNAMIC */
 };
 
 /**
@@ -567,7 +880,8 @@ int __init sourcesink_add(struct usb_composite_dev *cdev, bool autoresume)
 		return id;
 	strings_sourcesink[0].id = id;
 
-	source_sink_intf.iInterface = id;
+	source_sink_intf_alt0.iInterface = id;
+	source_sink_intf_alt1.iInterface = id;
 	sourcesink_driver.iConfiguration = id;
 
 	/* support autoresume for remote wakeup testing */
diff --git a/drivers/usb/gadget/fsl_qe_udc.c b/drivers/usb/gadget/fsl_qe_udc.c
index 877a2c46672..51881f3bd07 100644
--- a/drivers/usb/gadget/fsl_qe_udc.c
+++ b/drivers/usb/gadget/fsl_qe_udc.c
@@ -71,9 +71,6 @@ static struct usb_endpoint_descriptor qe_ep0_desc = {
 	.wMaxPacketSize =	USB_MAX_CTRL_PAYLOAD,
 };
 
-/* it is initialized in probe()  */
-static struct qe_udc *udc_controller;
-
 /********************************************************************
  *      Internal Used Function Start
 ********************************************************************/
@@ -188,8 +185,8 @@ static int qe_ep0_stall(struct qe_udc *udc)
 {
 	qe_eptx_stall_change(&udc->eps[0], 1);
 	qe_eprx_stall_change(&udc->eps[0], 1);
-	udc_controller->ep0_state = WAIT_FOR_SETUP;
-	udc_controller->ep0_dir = 0;
+	udc->ep0_state = WAIT_FOR_SETUP;
+	udc->ep0_dir = 0;
 	return 0;
 }
 
@@ -450,13 +447,13 @@ static int qe_ep_rxbd_update(struct qe_ep *ep)
 
 	ep->rxbuf_d = virt_to_phys((void *)ep->rxbuffer);
 	if (ep->rxbuf_d == DMA_ADDR_INVALID) {
-		ep->rxbuf_d = dma_map_single(udc_controller->gadget.dev.parent,
+		ep->rxbuf_d = dma_map_single(ep->udc->gadget.dev.parent,
 					ep->rxbuffer,
 					size,
 					DMA_FROM_DEVICE);
 		ep->rxbufmap = 1;
 	} else {
-		dma_sync_single_for_device(udc_controller->gadget.dev.parent,
+		dma_sync_single_for_device(ep->udc->gadget.dev.parent,
 					ep->rxbuf_d, size,
 					DMA_FROM_DEVICE);
 		ep->rxbufmap = 0;
@@ -489,10 +486,10 @@ static int qe_ep_register_init(struct qe_udc *udc, unsigned char pipe_num)
 	epparam = udc->ep_param[pipe_num];
 
 	usep = 0;
-	logepnum = (ep->desc->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK);
+	logepnum = (ep->ep.desc->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK);
 	usep |= (logepnum << USB_EPNUM_SHIFT);
 
-	switch (ep->desc->bmAttributes & 0x03) {
+	switch (ep->ep.desc->bmAttributes & 0x03) {
 	case USB_ENDPOINT_XFER_BULK:
 		usep |= USB_TRANS_BULK;
 		break;
@@ -644,7 +641,7 @@ static int qe_ep_init(struct qe_udc *udc,
 	/* initialize ep structure */
 	ep->ep.maxpacket = max;
 	ep->tm = (u8)(desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK);
-	ep->desc = desc;
+	ep->ep.desc = desc;
 	ep->stopped = 0;
 	ep->init = 1;
 
@@ -698,14 +695,14 @@ en_done:
 	return -ENODEV;
 }
 
-static inline void qe_usb_enable(void)
+static inline void qe_usb_enable(struct qe_udc *udc)
 {
-	setbits8(&udc_controller->usb_regs->usb_usmod, USB_MODE_EN);
+	setbits8(&udc->usb_regs->usb_usmod, USB_MODE_EN);
 }
 
-static inline void qe_usb_disable(void)
+static inline void qe_usb_disable(struct qe_udc *udc)
 {
-	clrbits8(&udc_controller->usb_regs->usb_usmod, USB_MODE_EN);
+	clrbits8(&udc->usb_regs->usb_usmod, USB_MODE_EN);
 }
 
 /*----------------------------------------------------------------------------*
@@ -1599,7 +1596,7 @@ static int qe_ep_enable(struct usb_ep *_ep,
 	ep = container_of(_ep, struct qe_ep, ep);
 
 	/* catch various bogus parameters */
-	if (!_ep || !desc || ep->desc || _ep->name == ep_name[0] ||
+	if (!_ep || !desc || ep->ep.desc || _ep->name == ep_name[0] ||
 			(desc->bDescriptorType != USB_DT_ENDPOINT))
 		return -EINVAL;
 
@@ -1629,7 +1626,7 @@ static int qe_ep_disable(struct usb_ep *_ep)
 	ep = container_of(_ep, struct qe_ep, ep);
 	udc = ep->udc;
 
-	if (!_ep || !ep->desc) {
+	if (!_ep || !ep->ep.desc) {
 		dev_dbg(udc->dev, "%s not enabled\n", _ep ? ep->ep.name : NULL);
 		return -EINVAL;
 	}
@@ -1637,7 +1634,6 @@ static int qe_ep_disable(struct usb_ep *_ep)
 	spin_lock_irqsave(&udc->lock, flags);
 	/* Nuke all pending requests (does flush) */
 	nuke(ep, -ESHUTDOWN);
-	ep->desc = NULL;
 	ep->ep.desc = NULL;
 	ep->stopped = 1;
 	ep->tx_req = NULL;
@@ -1656,13 +1652,13 @@ static int qe_ep_disable(struct usb_ep *_ep)
 	if (ep->dir != USB_DIR_IN) {
 		kfree(ep->rxframe);
 		if (ep->rxbufmap) {
-			dma_unmap_single(udc_controller->gadget.dev.parent,
+			dma_unmap_single(udc->gadget.dev.parent,
 					ep->rxbuf_d, size,
 					DMA_FROM_DEVICE);
 			ep->rxbuf_d = DMA_ADDR_INVALID;
 		} else {
 			dma_sync_single_for_cpu(
-					udc_controller->gadget.dev.parent,
+					udc->gadget.dev.parent,
 					ep->rxbuf_d, size,
 					DMA_FROM_DEVICE);
 		}
@@ -1715,7 +1711,7 @@ static int __qe_ep_queue(struct usb_ep *_ep, struct usb_request *_req)
 		dev_dbg(udc->dev, "bad params\n");
 		return -EINVAL;
 	}
-	if (!_ep || (!ep->desc && ep_index(ep))) {
+	if (!_ep || (!ep->ep.desc && ep_index(ep))) {
 		dev_dbg(udc->dev, "bad ep\n");
 		return -EINVAL;
 	}
@@ -1826,7 +1822,7 @@ static int qe_ep_set_halt(struct usb_ep *_ep, int value)
 	struct qe_udc *udc;
 
 	ep = container_of(_ep, struct qe_ep, ep);
-	if (!_ep || !ep->desc) {
+	if (!_ep || !ep->ep.desc) {
 		status = -EINVAL;
 		goto out;
 	}
@@ -1880,9 +1876,10 @@ static struct usb_ep_ops qe_ep_ops = {
 /* Get the current frame number */
 static int qe_get_frame(struct usb_gadget *gadget)
 {
+	struct qe_udc *udc = container_of(gadget, struct qe_udc, gadget);
 	u16 tmp;
 
-	tmp = in_be16(&udc_controller->usb_param->frame_n);
+	tmp = in_be16(&udc->usb_param->frame_n);
 	if (tmp & 0x8000)
 		tmp = tmp & 0x07ff;
 	else
@@ -1891,57 +1888,16 @@ static int qe_get_frame(struct usb_gadget *gadget)
 	return (int)tmp;
 }
 
-/* Tries to wake up the host connected to this gadget
- *
- * Return : 0-success
- * Negative-this feature not enabled by host or not supported by device hw
- */
-static int qe_wakeup(struct usb_gadget *gadget)
-{
-	return -ENOTSUPP;
-}
-
-/* Notify controller that VBUS is powered, Called by whatever
-   detects VBUS sessions */
-static int qe_vbus_session(struct usb_gadget *gadget, int is_active)
-{
-	return -ENOTSUPP;
-}
-
-/* constrain controller's VBUS power usage
- * This call is used by gadget drivers during SET_CONFIGURATION calls,
- * reporting how much power the device may consume.  For example, this
- * could affect how quickly batteries are recharged.
- *
- * Returns zero on success, else negative errno.
- */
-static int qe_vbus_draw(struct usb_gadget *gadget, unsigned mA)
-{
-	return -ENOTSUPP;
-}
-
-/* Change Data+ pullup status
- * this func is used by usb_gadget_connect/disconnect
- */
-static int qe_pullup(struct usb_gadget *gadget, int is_on)
-{
-	return -ENOTSUPP;
-}
-
-static int fsl_qe_start(struct usb_gadget_driver *driver,
-		int (*bind)(struct usb_gadget *));
-static int fsl_qe_stop(struct usb_gadget_driver *driver);
+static int fsl_qe_start(struct usb_gadget *gadget,
+		struct usb_gadget_driver *driver);
+static int fsl_qe_stop(struct usb_gadget *gadget,
+		struct usb_gadget_driver *driver);
 
 /* defined in usb_gadget.h */
 static struct usb_gadget_ops qe_gadget_ops = {
 	.get_frame = qe_get_frame,
-	.wakeup = qe_wakeup,
-/*	.set_selfpowered = qe_set_selfpowered,*/ /* always selfpowered */
-	.vbus_session = qe_vbus_session,
-	.vbus_draw = qe_vbus_draw,
-	.pullup = qe_pullup,
-	.start = fsl_qe_start,
-	.stop = fsl_qe_stop,
+	.udc_start = fsl_qe_start,
+	.udc_stop = fsl_qe_stop,
 };
 
 /*-------------------------------------------------------------------------
@@ -2015,7 +1971,7 @@ static void ch9getstatus(struct qe_udc *udc, u8 request_type, u16 value,
 		u16 usep;
 
 		/* stall if endpoint doesn't exist */
-		if (!target_ep->desc)
+		if (!target_ep->ep.desc)
 			goto stall;
 
 		usep = in_be16(&udc->usb_regs->usb_usep[pipe]);
@@ -2190,7 +2146,7 @@ static int reset_irq(struct qe_udc *udc)
 	if (udc->usb_state == USB_STATE_DEFAULT)
 		return 0;
 
-	qe_usb_disable();
+	qe_usb_disable(udc);
 	out_8(&udc->usb_regs->usb_usadr, 0);
 
 	for (i = 0; i < USB_MAX_ENDPOINTS; i++) {
@@ -2202,7 +2158,7 @@ static int reset_irq(struct qe_udc *udc)
 	udc->usb_state = USB_STATE_DEFAULT;
 	udc->ep0_state = WAIT_FOR_SETUP;
 	udc->ep0_dir = USB_DIR_OUT;
-	qe_usb_enable();
+	qe_usb_enable(udc);
 	return 0;
 }
 
@@ -2327,92 +2283,65 @@ static irqreturn_t qe_udc_irq(int irq, void *_udc)
 /*-------------------------------------------------------------------------
 	Gadget driver probe and unregister.
  --------------------------------------------------------------------------*/
-static int fsl_qe_start(struct usb_gadget_driver *driver,
-		int (*bind)(struct usb_gadget *))
+static int fsl_qe_start(struct usb_gadget *gadget,
+		struct usb_gadget_driver *driver)
 {
-	int retval;
-	unsigned long flags = 0;
-
-	/* standard operations */
-	if (!udc_controller)
-		return -ENODEV;
-
-	if (!driver || driver->max_speed < USB_SPEED_FULL
-			|| !bind || !driver->disconnect || !driver->setup)
-		return -EINVAL;
-
-	if (udc_controller->driver)
-		return -EBUSY;
+	struct qe_udc *udc;
+	unsigned long flags;
 
+	udc = container_of(gadget, struct qe_udc, gadget);
 	/* lock is needed but whether should use this lock or another */
-	spin_lock_irqsave(&udc_controller->lock, flags);
+	spin_lock_irqsave(&udc->lock, flags);
 
 	driver->driver.bus = NULL;
 	/* hook up the driver */
-	udc_controller->driver = driver;
-	udc_controller->gadget.dev.driver = &driver->driver;
-	udc_controller->gadget.speed = driver->max_speed;
-	spin_unlock_irqrestore(&udc_controller->lock, flags);
-
-	retval = bind(&udc_controller->gadget);
-	if (retval) {
-		dev_err(udc_controller->dev, "bind to %s --> %d",
-				driver->driver.name, retval);
-		udc_controller->gadget.dev.driver = NULL;
-		udc_controller->driver = NULL;
-		return retval;
-	}
+	udc->driver = driver;
+	udc->gadget.dev.driver = &driver->driver;
+	udc->gadget.speed = driver->max_speed;
 
 	/* Enable IRQ reg and Set usbcmd reg EN bit */
-	qe_usb_enable();
-
-	out_be16(&udc_controller->usb_regs->usb_usber, 0xffff);
-	out_be16(&udc_controller->usb_regs->usb_usbmr, USB_E_DEFAULT_DEVICE);
-	udc_controller->usb_state = USB_STATE_ATTACHED;
-	udc_controller->ep0_state = WAIT_FOR_SETUP;
-	udc_controller->ep0_dir = USB_DIR_OUT;
-	dev_info(udc_controller->dev, "%s bind to driver %s \n",
-		udc_controller->gadget.name, driver->driver.name);
+	qe_usb_enable(udc);
+
+	out_be16(&udc->usb_regs->usb_usber, 0xffff);
+	out_be16(&udc->usb_regs->usb_usbmr, USB_E_DEFAULT_DEVICE);
+	udc->usb_state = USB_STATE_ATTACHED;
+	udc->ep0_state = WAIT_FOR_SETUP;
+	udc->ep0_dir = USB_DIR_OUT;
+	spin_unlock_irqrestore(&udc->lock, flags);
+
+	dev_info(udc->dev, "%s bind to driver %s\n", udc->gadget.name,
+			driver->driver.name);
 	return 0;
 }
 
-static int fsl_qe_stop(struct usb_gadget_driver *driver)
+static int fsl_qe_stop(struct usb_gadget *gadget,
+		struct usb_gadget_driver *driver)
 {
+	struct qe_udc *udc;
 	struct qe_ep *loop_ep;
 	unsigned long flags;
 
-	if (!udc_controller)
-		return -ENODEV;
-
-	if (!driver || driver != udc_controller->driver)
-		return -EINVAL;
-
+	udc = container_of(gadget, struct qe_udc, gadget);
 	/* stop usb controller, disable intr */
-	qe_usb_disable();
+	qe_usb_disable(udc);
 
 	/* in fact, no needed */
-	udc_controller->usb_state = USB_STATE_ATTACHED;
-	udc_controller->ep0_state = WAIT_FOR_SETUP;
-	udc_controller->ep0_dir = 0;
+	udc->usb_state = USB_STATE_ATTACHED;
+	udc->ep0_state = WAIT_FOR_SETUP;
+	udc->ep0_dir = 0;
 
 	/* stand operation */
-	spin_lock_irqsave(&udc_controller->lock, flags);
-	udc_controller->gadget.speed = USB_SPEED_UNKNOWN;
-	nuke(&udc_controller->eps[0], -ESHUTDOWN);
-	list_for_each_entry(loop_ep, &udc_controller->gadget.ep_list,
-				ep.ep_list)
+	spin_lock_irqsave(&udc->lock, flags);
+	udc->gadget.speed = USB_SPEED_UNKNOWN;
+	nuke(&udc->eps[0], -ESHUTDOWN);
+	list_for_each_entry(loop_ep, &udc->gadget.ep_list, ep.ep_list)
 		nuke(loop_ep, -ESHUTDOWN);
-	spin_unlock_irqrestore(&udc_controller->lock, flags);
-
-	/* report disconnect; the controller is already quiesced */
-	driver->disconnect(&udc_controller->gadget);
+	spin_unlock_irqrestore(&udc->lock, flags);
 
-	/* unbind gadget and unhook driver. */
-	driver->unbind(&udc_controller->gadget);
-	udc_controller->gadget.dev.driver = NULL;
-	udc_controller->driver = NULL;
+	udc->gadget.dev.driver = NULL;
+	udc->driver = NULL;
 
-	dev_info(udc_controller->dev, "unregistered gadget driver '%s'\r\n",
+	dev_info(udc->dev, "unregistered gadget driver '%s'\r\n",
 			driver->driver.name);
 	return 0;
 }
@@ -2502,7 +2431,7 @@ static int __devinit qe_ep_config(struct qe_udc *udc, unsigned char pipe_num)
 	ep->ep.ops = &qe_ep_ops;
 	ep->stopped = 1;
 	ep->ep.maxpacket = (unsigned short) ~0;
-	ep->desc = NULL;
+	ep->ep.desc = NULL;
 	ep->dir = 0xff;
 	ep->epnum = (u8)pipe_num;
 	ep->sent = 0;
@@ -2531,21 +2460,22 @@ static int __devinit qe_ep_config(struct qe_udc *udc, unsigned char pipe_num)
  *----------------------------------------------------------------------*/
 static void qe_udc_release(struct device *dev)
 {
-	int i = 0;
+	struct qe_udc *udc = container_of(dev, struct qe_udc, gadget.dev);
+	int i;
 
-	complete(udc_controller->done);
-	cpm_muram_free(cpm_muram_offset(udc_controller->ep_param[0]));
+	complete(udc->done);
+	cpm_muram_free(cpm_muram_offset(udc->ep_param[0]));
 	for (i = 0; i < USB_MAX_ENDPOINTS; i++)
-		udc_controller->ep_param[i] = NULL;
+		udc->ep_param[i] = NULL;
 
-	kfree(udc_controller);
-	udc_controller = NULL;
+	kfree(udc);
 }
 
 /* Driver probe functions */
 static const struct of_device_id qe_udc_match[];
 static int __devinit qe_udc_probe(struct platform_device *ofdev)
 {
+	struct qe_udc *udc;
 	const struct of_device_id *match;
 	struct device_node *np = ofdev->dev.of_node;
 	struct qe_ep *ep;
@@ -2562,44 +2492,44 @@ static int __devinit qe_udc_probe(struct platform_device *ofdev)
 		return -ENODEV;
 
 	/* Initialize the udc structure including QH member and other member */
-	udc_controller = qe_udc_config(ofdev);
-	if (!udc_controller) {
+	udc = qe_udc_config(ofdev);
+	if (!udc) {
 		dev_err(&ofdev->dev, "failed to initialize\n");
 		return -ENOMEM;
 	}
 
-	udc_controller->soc_type = (unsigned long)match->data;
-	udc_controller->usb_regs = of_iomap(np, 0);
-	if (!udc_controller->usb_regs) {
+	udc->soc_type = (unsigned long)match->data;
+	udc->usb_regs = of_iomap(np, 0);
+	if (!udc->usb_regs) {
 		ret = -ENOMEM;
 		goto err1;
 	}
 
 	/* initialize usb hw reg except for regs for EP,
 	 * leave usbintr reg untouched*/
-	qe_udc_reg_init(udc_controller);
+	qe_udc_reg_init(udc);
 
 	/* here comes the stand operations for probe
 	 * set the qe_udc->gadget.xxx */
-	udc_controller->gadget.ops = &qe_gadget_ops;
+	udc->gadget.ops = &qe_gadget_ops;
 
 	/* gadget.ep0 is a pointer */
-	udc_controller->gadget.ep0 = &udc_controller->eps[0].ep;
+	udc->gadget.ep0 = &udc->eps[0].ep;
 
-	INIT_LIST_HEAD(&udc_controller->gadget.ep_list);
+	INIT_LIST_HEAD(&udc->gadget.ep_list);
 
 	/* modify in register gadget process */
-	udc_controller->gadget.speed = USB_SPEED_UNKNOWN;
+	udc->gadget.speed = USB_SPEED_UNKNOWN;
 
 	/* name: Identifies the controller hardware type. */
-	udc_controller->gadget.name = driver_name;
+	udc->gadget.name = driver_name;
 
-	device_initialize(&udc_controller->gadget.dev);
+	device_initialize(&udc->gadget.dev);
 
-	dev_set_name(&udc_controller->gadget.dev, "gadget");
+	dev_set_name(&udc->gadget.dev, "gadget");
 
-	udc_controller->gadget.dev.release = qe_udc_release;
-	udc_controller->gadget.dev.parent = &ofdev->dev;
+	udc->gadget.dev.release = qe_udc_release;
+	udc->gadget.dev.parent = &ofdev->dev;
 
 	/* initialize qe_ep struct */
 	for (i = 0; i < USB_MAX_ENDPOINTS ; i++) {
@@ -2608,104 +2538,104 @@ static int __devinit qe_udc_probe(struct platform_device *ofdev)
 
 		/* setup the qe_ep struct and link ep.ep.list
 		 * into gadget.ep_list */
-		qe_ep_config(udc_controller, (unsigned char)i);
+		qe_ep_config(udc, (unsigned char)i);
 	}
 
 	/* ep0 initialization in here */
-	ret = qe_ep_init(udc_controller, 0, &qe_ep0_desc);
+	ret = qe_ep_init(udc, 0, &qe_ep0_desc);
 	if (ret)
 		goto err2;
 
 	/* create a buf for ZLP send, need to remain zeroed */
-	udc_controller->nullbuf = kzalloc(256, GFP_KERNEL);
-	if (udc_controller->nullbuf == NULL) {
-		dev_err(udc_controller->dev, "cannot alloc nullbuf\n");
+	udc->nullbuf = kzalloc(256, GFP_KERNEL);
+	if (udc->nullbuf == NULL) {
+		dev_err(udc->dev, "cannot alloc nullbuf\n");
 		ret = -ENOMEM;
 		goto err3;
 	}
 
 	/* buffer for data of get_status request */
-	udc_controller->statusbuf = kzalloc(2, GFP_KERNEL);
-	if (udc_controller->statusbuf == NULL) {
+	udc->statusbuf = kzalloc(2, GFP_KERNEL);
+	if (udc->statusbuf == NULL) {
 		ret = -ENOMEM;
 		goto err4;
 	}
 
-	udc_controller->nullp = virt_to_phys((void *)udc_controller->nullbuf);
-	if (udc_controller->nullp == DMA_ADDR_INVALID) {
-		udc_controller->nullp = dma_map_single(
-					udc_controller->gadget.dev.parent,
-					udc_controller->nullbuf,
+	udc->nullp = virt_to_phys((void *)udc->nullbuf);
+	if (udc->nullp == DMA_ADDR_INVALID) {
+		udc->nullp = dma_map_single(
+					udc->gadget.dev.parent,
+					udc->nullbuf,
 					256,
 					DMA_TO_DEVICE);
-		udc_controller->nullmap = 1;
+		udc->nullmap = 1;
 	} else {
-		dma_sync_single_for_device(udc_controller->gadget.dev.parent,
-					udc_controller->nullp, 256,
+		dma_sync_single_for_device(udc->gadget.dev.parent,
+					udc->nullp, 256,
 					DMA_TO_DEVICE);
 	}
 
-	tasklet_init(&udc_controller->rx_tasklet, ep_rx_tasklet,
-			(unsigned long)udc_controller);
+	tasklet_init(&udc->rx_tasklet, ep_rx_tasklet,
+			(unsigned long)udc);
 	/* request irq and disable DR  */
-	udc_controller->usb_irq = irq_of_parse_and_map(np, 0);
-	if (!udc_controller->usb_irq) {
+	udc->usb_irq = irq_of_parse_and_map(np, 0);
+	if (!udc->usb_irq) {
 		ret = -EINVAL;
 		goto err_noirq;
 	}
 
-	ret = request_irq(udc_controller->usb_irq, qe_udc_irq, 0,
-				driver_name, udc_controller);
+	ret = request_irq(udc->usb_irq, qe_udc_irq, 0,
+				driver_name, udc);
 	if (ret) {
-		dev_err(udc_controller->dev, "cannot request irq %d err %d \n",
-			udc_controller->usb_irq, ret);
+		dev_err(udc->dev, "cannot request irq %d err %d\n",
+				udc->usb_irq, ret);
 		goto err5;
 	}
 
-	ret = device_add(&udc_controller->gadget.dev);
+	ret = device_add(&udc->gadget.dev);
 	if (ret)
 		goto err6;
 
-	ret = usb_add_gadget_udc(&ofdev->dev, &udc_controller->gadget);
+	ret = usb_add_gadget_udc(&ofdev->dev, &udc->gadget);
 	if (ret)
 		goto err7;
 
-	dev_info(udc_controller->dev,
+	dev_set_drvdata(&ofdev->dev, udc);
+	dev_info(udc->dev,
 			"%s USB controller initialized as device\n",
-			(udc_controller->soc_type == PORT_QE) ? "QE" : "CPM");
+			(udc->soc_type == PORT_QE) ? "QE" : "CPM");
 	return 0;
 
 err7:
-	device_unregister(&udc_controller->gadget.dev);
+	device_unregister(&udc->gadget.dev);
 err6:
-	free_irq(udc_controller->usb_irq, udc_controller);
+	free_irq(udc->usb_irq, udc);
 err5:
-	irq_dispose_mapping(udc_controller->usb_irq);
+	irq_dispose_mapping(udc->usb_irq);
 err_noirq:
-	if (udc_controller->nullmap) {
-		dma_unmap_single(udc_controller->gadget.dev.parent,
-			udc_controller->nullp, 256,
+	if (udc->nullmap) {
+		dma_unmap_single(udc->gadget.dev.parent,
+			udc->nullp, 256,
 				DMA_TO_DEVICE);
-			udc_controller->nullp = DMA_ADDR_INVALID;
+			udc->nullp = DMA_ADDR_INVALID;
 	} else {
-		dma_sync_single_for_cpu(udc_controller->gadget.dev.parent,
-			udc_controller->nullp, 256,
+		dma_sync_single_for_cpu(udc->gadget.dev.parent,
+			udc->nullp, 256,
 				DMA_TO_DEVICE);
 	}
-	kfree(udc_controller->statusbuf);
+	kfree(udc->statusbuf);
 err4:
-	kfree(udc_controller->nullbuf);
+	kfree(udc->nullbuf);
 err3:
-	ep = &udc_controller->eps[0];
+	ep = &udc->eps[0];
 	cpm_muram_free(cpm_muram_offset(ep->rxbase));
 	kfree(ep->rxframe);
 	kfree(ep->rxbuffer);
 	kfree(ep->txframe);
 err2:
-	iounmap(udc_controller->usb_regs);
+	iounmap(udc->usb_regs);
 err1:
-	kfree(udc_controller);
-	udc_controller = NULL;
+	kfree(udc);
 	return ret;
 }
 
@@ -2723,44 +2653,41 @@ static int qe_udc_resume(struct platform_device *dev)
 
 static int __devexit qe_udc_remove(struct platform_device *ofdev)
 {
+	struct qe_udc *udc = dev_get_drvdata(&ofdev->dev);
 	struct qe_ep *ep;
 	unsigned int size;
-
 	DECLARE_COMPLETION(done);
 
-	if (!udc_controller)
-		return -ENODEV;
-
-	usb_del_gadget_udc(&udc_controller->gadget);
+	usb_del_gadget_udc(&udc->gadget);
 
-	udc_controller->done = &done;
-	tasklet_disable(&udc_controller->rx_tasklet);
+	udc->done = &done;
+	tasklet_disable(&udc->rx_tasklet);
 
-	if (udc_controller->nullmap) {
-		dma_unmap_single(udc_controller->gadget.dev.parent,
-			udc_controller->nullp, 256,
+	if (udc->nullmap) {
+		dma_unmap_single(udc->gadget.dev.parent,
+			udc->nullp, 256,
 				DMA_TO_DEVICE);
-			udc_controller->nullp = DMA_ADDR_INVALID;
+			udc->nullp = DMA_ADDR_INVALID;
 	} else {
-		dma_sync_single_for_cpu(udc_controller->gadget.dev.parent,
-			udc_controller->nullp, 256,
+		dma_sync_single_for_cpu(udc->gadget.dev.parent,
+			udc->nullp, 256,
 				DMA_TO_DEVICE);
 	}
-	kfree(udc_controller->statusbuf);
-	kfree(udc_controller->nullbuf);
+	kfree(udc->statusbuf);
+	kfree(udc->nullbuf);
 
-	ep = &udc_controller->eps[0];
+	ep = &udc->eps[0];
 	cpm_muram_free(cpm_muram_offset(ep->rxbase));
 	size = (ep->ep.maxpacket + USB_CRC_SIZE + 2) * (USB_BDRING_LEN + 1);
 
 	kfree(ep->rxframe);
 	if (ep->rxbufmap) {
-		dma_unmap_single(udc_controller->gadget.dev.parent,
+		dma_unmap_single(udc->gadget.dev.parent,
 				ep->rxbuf_d, size,
 				DMA_FROM_DEVICE);
 		ep->rxbuf_d = DMA_ADDR_INVALID;
 	} else {
-		dma_sync_single_for_cpu(udc_controller->gadget.dev.parent,
+		dma_sync_single_for_cpu(udc->gadget.dev.parent,
 				ep->rxbuf_d, size,
 				DMA_FROM_DEVICE);
 	}
@@ -2768,14 +2695,14 @@ static int __devexit qe_udc_remove(struct platform_device *ofdev)
 	kfree(ep->rxbuffer);
 	kfree(ep->txframe);
 
-	free_irq(udc_controller->usb_irq, udc_controller);
-	irq_dispose_mapping(udc_controller->usb_irq);
+	free_irq(udc->usb_irq, udc);
+	irq_dispose_mapping(udc->usb_irq);
 
-	tasklet_kill(&udc_controller->rx_tasklet);
+	tasklet_kill(&udc->rx_tasklet);
 
-	iounmap(udc_controller->usb_regs);
+	iounmap(udc->usb_regs);
 
-	device_unregister(&udc_controller->gadget.dev);
+	device_unregister(&udc->gadget.dev);
 	/* wait for release() of gadget.dev to free udc */
 	wait_for_completion(&done);
 
diff --git a/drivers/usb/gadget/fsl_qe_udc.h b/drivers/usb/gadget/fsl_qe_udc.h
index 1da5fb03d21..4c07ca9cebf 100644
--- a/drivers/usb/gadget/fsl_qe_udc.h
+++ b/drivers/usb/gadget/fsl_qe_udc.h
@@ -266,7 +266,6 @@ struct qe_ep {
 	struct usb_ep ep;
 	struct list_head queue;
 	struct qe_udc *udc;
-	const struct usb_endpoint_descriptor *desc;
 	struct usb_gadget *gadget;
 
 	u8 state;
diff --git a/drivers/usb/gadget/fsl_udc_core.c b/drivers/usb/gadget/fsl_udc_core.c
index 0d9b2fa45af..28316858208 100644
--- a/drivers/usb/gadget/fsl_udc_core.c
+++ b/drivers/usb/gadget/fsl_udc_core.c
@@ -567,7 +567,7 @@ static int fsl_ep_enable(struct usb_ep *_ep,
 	ep = container_of(_ep, struct fsl_ep, ep);
 
 	/* catch various bogus parameters */
-	if (!_ep || !desc || ep->desc
+	if (!_ep || !desc || ep->ep.desc
 			|| (desc->bDescriptorType != USB_DT_ENDPOINT))
 		return -EINVAL;
 
@@ -608,7 +608,7 @@ static int fsl_ep_enable(struct usb_ep *_ep,
 
 	spin_lock_irqsave(&udc->lock, flags);
 	ep->ep.maxpacket = max;
-	ep->desc = desc;
+	ep->ep.desc = desc;
 	ep->stopped = 0;
 
 	/* Controller related setup */
@@ -632,7 +632,7 @@ static int fsl_ep_enable(struct usb_ep *_ep,
 	retval = 0;
 
 	VDBG("enabled %s (ep%d%s) maxpacket %d",ep->ep.name,
-			ep->desc->bEndpointAddress & 0x0f,
+			ep->ep.desc->bEndpointAddress & 0x0f,
 			(desc->bEndpointAddress & USB_DIR_IN)
 				? "in" : "out", max);
 en_done:
@@ -652,7 +652,7 @@ static int fsl_ep_disable(struct usb_ep *_ep)
 	int ep_num;
 
 	ep = container_of(_ep, struct fsl_ep, ep);
-	if (!_ep || !ep->desc) {
+	if (!_ep || !ep->ep.desc) {
 		VDBG("%s not enabled", _ep ? ep->ep.name : NULL);
 		return -EINVAL;
 	}
@@ -675,7 +675,6 @@ static int fsl_ep_disable(struct usb_ep *_ep)
 	/* nuke all pending requests (does flush) */
 	nuke(ep, -ESHUTDOWN);
 
-	ep->desc = NULL;
 	ep->ep.desc = NULL;
 	ep->stopped = 1;
 	spin_unlock_irqrestore(&udc->lock, flags);
@@ -754,6 +753,8 @@ static void fsl_queue_td(struct fsl_ep *ep, struct fsl_req *req)
 		lastreq = list_entry(ep->queue.prev, struct fsl_req, queue);
 		lastreq->tail->next_td_ptr =
 			cpu_to_hc32(req->head->td_dma & DTD_ADDR_MASK);
+		/* Ensure dTD's next dtd pointer to be updated */
+		wmb();
 		/* Read prime bit, if 1 goto done */
 		if (fsl_readl(&dr_regs->endpointprime) & bitmask)
 			return;
@@ -892,11 +893,11 @@ fsl_ep_queue(struct usb_ep *_ep, struct usb_request *_req, gfp_t gfp_flags)
 		VDBG("%s, bad params", __func__);
 		return -EINVAL;
 	}
-	if (unlikely(!_ep || !ep->desc)) {
+	if (unlikely(!_ep || !ep->ep.desc)) {
 		VDBG("%s, bad ep", __func__);
 		return -EINVAL;
 	}
-	if (usb_endpoint_xfer_isoc(ep->desc)) {
+	if (usb_endpoint_xfer_isoc(ep->ep.desc)) {
 		if (req->req.length > ep->ep.maxpacket)
 			return -EMSGSIZE;
 	}
@@ -1035,12 +1036,12 @@ static int fsl_ep_set_halt(struct usb_ep *_ep, int value)
 
 	ep = container_of(_ep, struct fsl_ep, ep);
 	udc = ep->udc;
-	if (!_ep || !ep->desc) {
+	if (!_ep || !ep->ep.desc) {
 		status = -EINVAL;
 		goto out;
 	}
 
-	if (usb_endpoint_xfer_isoc(ep->desc)) {
+	if (usb_endpoint_xfer_isoc(ep->ep.desc)) {
 		status = -EOPNOTSUPP;
 		goto out;
 	}
@@ -1079,7 +1080,7 @@ static int fsl_ep_fifo_status(struct usb_ep *_ep)
 	struct ep_queue_head *qh;
 
 	ep = container_of(_ep, struct fsl_ep, ep);
-	if (!_ep || (!ep->desc && ep_index(ep) != 0))
+	if (!_ep || (!ep->ep.desc && ep_index(ep) != 0))
 		return -ENODEV;
 
 	udc = (struct fsl_udc *)ep->udc;
@@ -1112,7 +1113,7 @@ static void fsl_ep_fifo_flush(struct usb_ep *_ep)
 		return;
 	} else {
 		ep = container_of(_ep, struct fsl_ep, ep);
-		if (!ep->desc)
+		if (!ep->ep.desc)
 			return;
 	}
 	ep_num = ep_index(ep);
@@ -1367,7 +1368,7 @@ static void ch9getstatus(struct fsl_udc *udc, u8 request_type, u16 value,
 		target_ep = get_ep_by_pipe(udc, get_pipe_by_windex(index));
 
 		/* stall if endpoint doesn't exist */
-		if (!target_ep->desc)
+		if (!target_ep->ep.desc)
 			goto stall;
 		tmp = dr_ep_get_stall(ep_index(target_ep), ep_is_in(target_ep))
 				<< USB_ENDPOINT_HALT;
@@ -2277,7 +2278,7 @@ static int fsl_proc_read(char *page, char **start, off_t off, int count,
 	}
 	/* other gadget->eplist ep */
 	list_for_each_entry(ep, &udc->gadget.ep_list, ep.ep_list) {
-		if (ep->desc) {
+		if (ep->ep.desc) {
 			t = scnprintf(next, size,
 					"\nFor %s Maxpkt is 0x%x "
 					"index is 0x%x\n",
diff --git a/drivers/usb/gadget/fsl_usb2_udc.h b/drivers/usb/gadget/fsl_usb2_udc.h
index 1212646841a..5cd7b7e7ddb 100644
--- a/drivers/usb/gadget/fsl_usb2_udc.h
+++ b/drivers/usb/gadget/fsl_usb2_udc.h
@@ -461,7 +461,6 @@ struct fsl_ep {
 	struct list_head queue;
 	struct fsl_udc *udc;
 	struct ep_queue_head *qh;
-	const struct usb_endpoint_descriptor *desc;
 	struct usb_gadget *gadget;
 
 	char name[14];
diff --git a/drivers/usb/gadget/fusb300_udc.c b/drivers/usb/gadget/fusb300_udc.c
index 5831cb4a0b3..cdd94540e1c 100644
--- a/drivers/usb/gadget/fusb300_udc.c
+++ b/drivers/usb/gadget/fusb300_udc.c
@@ -203,7 +203,7 @@ static int config_ep(struct fusb300_ep *ep,
 	struct fusb300 *fusb300 = ep->fusb300;
 	struct fusb300_ep_info info;
 
-	ep->desc = desc;
+	ep->ep.desc = desc;
 
 	info.interval = 0;
 	info.addrofs = 0;
@@ -443,7 +443,7 @@ static int fusb300_queue(struct usb_ep *_ep, struct usb_request *_req,
 	req->req.actual = 0;
 	req->req.status = -EINPROGRESS;
 
-	if (ep->desc == NULL) /* ep0 */
+	if (ep->ep.desc == NULL) /* ep0 */
 		ep0_queue(ep, req);
 	else if (request && !ep->stall)
 		enable_fifo_int(ep);
diff --git a/drivers/usb/gadget/fusb300_udc.h b/drivers/usb/gadget/fusb300_udc.h
index 92745bd0306..542cd83cc80 100644
--- a/drivers/usb/gadget/fusb300_udc.h
+++ b/drivers/usb/gadget/fusb300_udc.h
@@ -650,7 +650,6 @@ struct fusb300_ep {
 
 	unsigned char		epnum;
 	unsigned char		type;
-	const struct usb_endpoint_descriptor	*desc;
 };
 
 struct fusb300 {
diff --git a/drivers/usb/gadget/g_zero.h b/drivers/usb/gadget/g_zero.h
index e84b3c47ed3..71ca193358b 100644
--- a/drivers/usb/gadget/g_zero.h
+++ b/drivers/usb/gadget/g_zero.h
@@ -13,10 +13,11 @@ extern unsigned buflen;
 extern const struct usb_descriptor_header *otg_desc[];
 
 /* common utilities */
-struct usb_request *alloc_ep_req(struct usb_ep *ep);
+struct usb_request *alloc_ep_req(struct usb_ep *ep, int len);
 void free_ep_req(struct usb_ep *ep, struct usb_request *req);
 void disable_endpoints(struct usb_composite_dev *cdev,
-		struct usb_ep *in, struct usb_ep *out);
+		struct usb_ep *in, struct usb_ep *out,
+		struct usb_ep *iso_in, struct usb_ep *iso_out);
 
 /* configuration-specific linkup */
 int sourcesink_add(struct usb_composite_dev *cdev, bool autoresume);
diff --git a/drivers/usb/gadget/goku_udc.c b/drivers/usb/gadget/goku_udc.c
index e151d6b87de..b241e6c6a7f 100644
--- a/drivers/usb/gadget/goku_udc.c
+++ b/drivers/usb/gadget/goku_udc.c
@@ -102,7 +102,7 @@ goku_ep_enable(struct usb_ep *_ep, const struct usb_endpoint_descriptor *desc)
 	unsigned long	flags;
 
 	ep = container_of(_ep, struct goku_ep, ep);
-	if (!_ep || !desc || ep->desc
+	if (!_ep || !desc || ep->ep.desc
 			|| desc->bDescriptorType != USB_DT_ENDPOINT)
 		return -EINVAL;
 	dev = ep->dev;
@@ -176,7 +176,7 @@ goku_ep_enable(struct usb_ep *_ep, const struct usb_endpoint_descriptor *desc)
 	command(ep->dev->regs, COMMAND_RESET, ep->num);
 	ep->ep.maxpacket = max;
 	ep->stopped = 0;
-	ep->desc = desc;
+	ep->ep.desc = desc;
 	spin_unlock_irqrestore(&ep->dev->lock, flags);
 
 	DBG(dev, "enable %s %s %s maxpacket %u\n", ep->ep.name,
@@ -233,7 +233,6 @@ static void ep_reset(struct goku_udc_regs __iomem *regs, struct goku_ep *ep)
 	}
 
 	ep->ep.maxpacket = MAX_FIFO_SIZE;
-	ep->desc = NULL;
 	ep->ep.desc = NULL;
 	ep->stopped = 1;
 	ep->irqs = 0;
@@ -247,7 +246,7 @@ static int goku_ep_disable(struct usb_ep *_ep)
 	unsigned long	flags;
 
 	ep = container_of(_ep, struct goku_ep, ep);
-	if (!_ep || !ep->desc)
+	if (!_ep || !ep->ep.desc)
 		return -ENODEV;
 	dev = ep->dev;
 	if (dev->ep0state == EP0_SUSPEND)
@@ -722,7 +721,7 @@ goku_queue(struct usb_ep *_ep, struct usb_request *_req, gfp_t gfp_flags)
 			|| !_req->buf || !list_empty(&req->queue)))
 		return -EINVAL;
 	ep = container_of(_ep, struct goku_ep, ep);
-	if (unlikely(!_ep || (!ep->desc && ep->num != 0)))
+	if (unlikely(!_ep || (!ep->ep.desc && ep->num != 0)))
 		return -EINVAL;
 	dev = ep->dev;
 	if (unlikely(!dev->driver || dev->gadget.speed == USB_SPEED_UNKNOWN))
@@ -815,7 +814,7 @@ static int goku_dequeue(struct usb_ep *_ep, struct usb_request *_req)
 	unsigned long		flags;
 
 	ep = container_of(_ep, struct goku_ep, ep);
-	if (!_ep || !_req || (!ep->desc && ep->num != 0))
+	if (!_ep || !_req || (!ep->ep.desc && ep->num != 0))
 		return -EINVAL;
 	dev = ep->dev;
 	if (!dev->driver)
@@ -896,7 +895,7 @@ static int goku_set_halt(struct usb_ep *_ep, int value)
 			return -EINVAL;
 
 	/* don't change EPxSTATUS_EP_INVALID to READY */
-	} else if (!ep->desc) {
+	} else if (!ep->ep.desc) {
 		DBG(ep->dev, "%s %s inactive?\n", __func__, ep->ep.name);
 		return -EINVAL;
 	}
@@ -955,7 +954,7 @@ static void goku_fifo_flush(struct usb_ep *_ep)
 	VDBG(ep->dev, "%s %s\n", __func__, ep->ep.name);
 
 	/* don't change EPxSTATUS_EP_INVALID to READY */
-	if (!ep->desc && ep->num != 0) {
+	if (!ep->ep.desc && ep->num != 0) {
 		DBG(ep->dev, "%s %s inactive?\n", __func__, ep->ep.name);
 		return;
 	}
@@ -1152,7 +1151,7 @@ udc_proc_read(char *buffer, char **start, off_t off, int count,
 		struct goku_ep		*ep = &dev->ep [i];
 		struct goku_request	*req;
 
-		if (i && !ep->desc)
+		if (i && !ep->ep.desc)
 			continue;
 
 		tmp = readl(ep->reg_status);
@@ -1473,7 +1472,8 @@ static void ep0_setup(struct goku_udc *dev)
 			case USB_RECIP_ENDPOINT:
 				tmp = le16_to_cpu(ctrl.wIndex) & 0x0f;
 				/* active endpoint */
-				if (tmp > 3 || (!dev->ep[tmp].desc && tmp != 0))
+				if (tmp > 3 ||
+				    (!dev->ep[tmp].ep.desc && tmp != 0))
 					goto stall;
 				if (ctrl.wIndex & cpu_to_le16(
 						USB_DIR_IN)) {
@@ -1895,14 +1895,4 @@ static struct pci_driver goku_pci_driver = {
 	/* FIXME add power management support */
 };
 
-static int __init init (void)
-{
-	return pci_register_driver (&goku_pci_driver);
-}
-module_init (init);
-
-static void __exit cleanup (void)
-{
-	pci_unregister_driver (&goku_pci_driver);
-}
-module_exit (cleanup);
+module_pci_driver(goku_pci_driver);
diff --git a/drivers/usb/gadget/goku_udc.h b/drivers/usb/gadget/goku_udc.h
index e7e0c69d3b1..85cdce0d190 100644
--- a/drivers/usb/gadget/goku_udc.h
+++ b/drivers/usb/gadget/goku_udc.h
@@ -216,7 +216,6 @@ struct goku_ep {
 
 	/* analogous to a host-side qh */
 	struct list_head			queue;
-	const struct usb_endpoint_descriptor	*desc;
 
 	u32 __iomem				*reg_fifo;
 	u32 __iomem				*reg_mode;
diff --git a/drivers/usb/gadget/imx_udc.c b/drivers/usb/gadget/imx_udc.c
index 8d1c75abd73..54034f84f99 100644
--- a/drivers/usb/gadget/imx_udc.c
+++ b/drivers/usb/gadget/imx_udc.c
@@ -1237,14 +1237,15 @@ irq_handler_t intr_handler(int i)
  *******************************************************************************
  */
 
-static int imx_udc_start(struct usb_gadget_driver *driver,
-		int (*bind)(struct usb_gadget *));
-static int imx_udc_stop(struct usb_gadget_driver *driver);
+static int imx_udc_start(struct usb_gadget *gadget,
+		struct usb_gadget_driver *driver);
+static int imx_udc_stop(struct usb_gadget *gadget,
+		struct usb_gadget_driver *driver);
 static const struct usb_gadget_ops imx_udc_ops = {
-	.get_frame	 = imx_udc_get_frame,
-	.wakeup		 = imx_udc_wakeup,
-	.start		= imx_udc_start,
-	.stop		= imx_udc_stop,
+	.get_frame	= imx_udc_get_frame,
+	.wakeup		= imx_udc_wakeup,
+	.udc_start	= imx_udc_start,
+	.udc_stop	= imx_udc_stop,
 };
 
 static struct imx_udc_struct controller = {
@@ -1329,23 +1330,13 @@ static struct imx_udc_struct controller = {
  * USB gadget driver functions
  *******************************************************************************
  */
-static int imx_udc_start(struct usb_gadget_driver *driver,
-		int (*bind)(struct usb_gadget *))
+static int imx_udc_start(struct usb_gadget *gadget,
+		struct usb_gadget_driver *driver)
 {
-	struct imx_udc_struct *imx_usb = &controller;
+	struct imx_udc_struct *imx_usb;
 	int retval;
 
-	if (!driver
-		|| driver->max_speed < USB_SPEED_FULL
-		|| !bind
-		|| !driver->disconnect
-		|| !driver->setup)
-			return -EINVAL;
-	if (!imx_usb)
-		return -ENODEV;
-	if (imx_usb->driver)
-		return -EBUSY;
-
+	imx_usb = container_of(gadget, struct imx_udc_struct, gadget);
 	/* first hook up the driver ... */
 	imx_usb->driver = driver;
 	imx_usb->gadget.dev.driver = &driver->driver;
@@ -1353,14 +1344,6 @@ static int imx_udc_start(struct usb_gadget_driver *driver,
 	retval = device_add(&imx_usb->gadget.dev);
 	if (retval)
 		goto fail;
-	retval = bind(&imx_usb->gadget);
-	if (retval) {
-		D_ERR(imx_usb->dev, "<%s> bind to driver %s --> error %d\n",
-			__func__, driver->driver.name, retval);
-		device_del(&imx_usb->gadget.dev);
-
-		goto fail;
-	}
 
 	D_INI(imx_usb->dev, "<%s> registered gadget driver '%s'\n",
 		__func__, driver->driver.name);
@@ -1374,20 +1357,16 @@ fail:
 	return retval;
 }
 
-static int imx_udc_stop(struct usb_gadget_driver *driver)
+static int imx_udc_stop(struct usb_gadget *gadget,
+		struct usb_gadget_driver *driver)
 {
-	struct imx_udc_struct *imx_usb = &controller;
-
-	if (!imx_usb)
-		return -ENODEV;
-	if (!driver || driver != imx_usb->driver || !driver->unbind)
-		return -EINVAL;
+	struct imx_udc_struct *imx_usb = container_of(gadget,
+			struct imx_udc_struct, gadget);
 
 	udc_stop_activity(imx_usb, driver);
 	imx_udc_disable(imx_usb);
 	del_timer(&imx_usb->timer);
 
-	driver->unbind(&imx_usb->gadget);
 	imx_usb->gadget.dev.driver = NULL;
 	imx_usb->driver = NULL;
 
diff --git a/drivers/usb/gadget/langwell_udc.c b/drivers/usb/gadget/langwell_udc.c
index f9cedd52cf2..e119519cdaf 100644
--- a/drivers/usb/gadget/langwell_udc.c
+++ b/drivers/usb/gadget/langwell_udc.c
@@ -154,7 +154,7 @@ static inline void print_all_registers(struct langwell_udc *dev)
 /*-------------------------------------------------------------------------*/
 
 #define	is_in(ep)	(((ep)->ep_num == 0) ? ((ep)->dev->ep0_dir ==	\
-			USB_DIR_IN) : (usb_endpoint_dir_in((ep)->desc)))
+			USB_DIR_IN) : (usb_endpoint_dir_in((ep)->ep.desc)))
 
 #define	DIR_STRING(ep)	(is_in(ep) ? "in" : "out")
 
@@ -257,7 +257,7 @@ static int langwell_ep_enable(struct usb_ep *_ep,
 	dev = ep->dev;
 	dev_vdbg(&dev->pdev->dev, "---> %s()\n", __func__);
 
-	if (!_ep || !desc || ep->desc
+	if (!_ep || !desc || ep->ep.desc
 			|| desc->bDescriptorType != USB_DT_ENDPOINT)
 		return -EINVAL;
 
@@ -337,7 +337,7 @@ static int langwell_ep_enable(struct usb_ep *_ep,
 	spin_lock_irqsave(&dev->lock, flags);
 
 	ep->ep.maxpacket = max;
-	ep->desc = desc;
+	ep->ep.desc = desc;
 	ep->stopped = 0;
 	ep->ep_num = usb_endpoint_num(desc);
 
@@ -432,7 +432,7 @@ static void nuke(struct langwell_ep *ep, int status)
 	ep->stopped = 1;
 
 	/* endpoint fifo flush */
-	if (&ep->ep && ep->desc)
+	if (&ep->ep && ep->ep.desc)
 		langwell_ep_fifo_flush(&ep->ep);
 
 	while (!list_empty(&ep->queue)) {
@@ -459,7 +459,7 @@ static int langwell_ep_disable(struct usb_ep *_ep)
 	dev = ep->dev;
 	dev_vdbg(&dev->pdev->dev, "---> %s()\n", __func__);
 
-	if (!_ep || !ep->desc)
+	if (!_ep || !ep->ep.desc)
 		return -EINVAL;
 
 	spin_lock_irqsave(&dev->lock, flags);
@@ -476,7 +476,6 @@ static int langwell_ep_disable(struct usb_ep *_ep)
 	/* nuke all pending requests (does flush) */
 	nuke(ep, -ESHUTDOWN);
 
-	ep->desc = NULL;
 	ep->ep.desc = NULL;
 	ep->stopped = 1;
 
@@ -752,14 +751,14 @@ static int langwell_ep_queue(struct usb_ep *_ep, struct usb_request *_req,
 		return -EINVAL;
 	}
 
-	if (unlikely(!_ep || !ep->desc))
+	if (unlikely(!_ep || !ep->ep.desc))
 		return -EINVAL;
 
 	dev = ep->dev;
 	req->ep = ep;
 	dev_vdbg(&dev->pdev->dev, "---> %s()\n", __func__);
 
-	if (usb_endpoint_xfer_isoc(ep->desc)) {
+	if (usb_endpoint_xfer_isoc(ep->ep.desc)) {
 		if (req->req.length > ep->ep.maxpacket)
 			return -EMSGSIZE;
 		is_iso = 1;
@@ -822,7 +821,7 @@ static int langwell_ep_dequeue(struct usb_ep *_ep, struct usb_request *_req)
 	dev = ep->dev;
 	dev_vdbg(&dev->pdev->dev, "---> %s()\n", __func__);
 
-	if (!_ep || !ep->desc || !_req)
+	if (!_ep || !ep->ep.desc || !_req)
 		return -EINVAL;
 
 	if (!dev->driver)
@@ -950,13 +949,13 @@ static int langwell_ep_set_halt(struct usb_ep *_ep, int value)
 
 	dev_vdbg(&dev->pdev->dev, "---> %s()\n", __func__);
 
-	if (!_ep || !ep->desc)
+	if (!_ep || !ep->ep.desc)
 		return -EINVAL;
 
 	if (!dev->driver || dev->gadget.speed == USB_SPEED_UNKNOWN)
 		return -ESHUTDOWN;
 
-	if (usb_endpoint_xfer_isoc(ep->desc))
+	if (usb_endpoint_xfer_isoc(ep->ep.desc))
 		return  -EOPNOTSUPP;
 
 	spin_lock_irqsave(&dev->lock, flags);
@@ -999,7 +998,7 @@ static int langwell_ep_set_wedge(struct usb_ep *_ep)
 
 	dev_vdbg(&dev->pdev->dev, "---> %s()\n", __func__);
 
-	if (!_ep || !ep->desc)
+	if (!_ep || !ep->ep.desc)
 		return -EINVAL;
 
 	dev_vdbg(&dev->pdev->dev, "<--- %s()\n", __func__);
@@ -1020,8 +1019,8 @@ static void langwell_ep_fifo_flush(struct usb_ep *_ep)
 
 	dev_vdbg(&dev->pdev->dev, "---> %s()\n", __func__);
 
-	if (!_ep || !ep->desc) {
-		dev_vdbg(&dev->pdev->dev, "ep or ep->desc is NULL\n");
+	if (!_ep || !ep->ep.desc) {
+		dev_vdbg(&dev->pdev->dev, "ep or ep->ep.desc is NULL\n");
 		dev_vdbg(&dev->pdev->dev, "<--- %s()\n", __func__);
 		return;
 	}
@@ -1402,7 +1401,7 @@ static int eps_reinit(struct langwell_udc *dev)
 	ep->stopped = 0;
 	ep->ep.maxpacket = EP0_MAX_PKT_SIZE;
 	ep->ep_num = 0;
-	ep->desc = &langwell_ep0_desc;
+	ep->ep.desc = &langwell_ep0_desc;
 	INIT_LIST_HEAD(&ep->queue);
 
 	ep->ep_type = USB_ENDPOINT_XFER_CONTROL;
@@ -1737,7 +1736,7 @@ static ssize_t show_langwell_udc(struct device *_dev,
 	}
 	/* other gadget->eplist ep */
 	list_for_each_entry(ep, &dev->gadget.ep_list, ep.ep_list) {
-		if (ep->desc) {
+		if (ep->ep.desc) {
 			t = scnprintf(next, size,
 					"\n%s MaxPacketSize: 0x%x, "
 					"ep_num: %d\n",
@@ -2046,10 +2045,10 @@ static struct langwell_ep *get_ep_by_windex(struct langwell_udc *dev,
 
 	list_for_each_entry(ep, &dev->gadget.ep_list, ep.ep_list) {
 		u8	bEndpointAddress;
-		if (!ep->desc)
+		if (!ep->ep.desc)
 			continue;
 
-		bEndpointAddress = ep->desc->bEndpointAddress;
+		bEndpointAddress = ep->ep.desc->bEndpointAddress;
 		if ((wIndex ^ bEndpointAddress) & USB_DIR_IN)
 			continue;
 
@@ -3412,23 +3411,9 @@ static struct pci_driver langwell_pci_driver = {
 	.shutdown =	langwell_udc_shutdown,
 };
 
-
-static int __init init(void)
-{
-	return pci_register_driver(&langwell_pci_driver);
-}
-module_init(init);
-
-
-static void __exit cleanup(void)
-{
-	pci_unregister_driver(&langwell_pci_driver);
-}
-module_exit(cleanup);
-
+module_pci_driver(langwell_pci_driver);
 
 MODULE_DESCRIPTION(DRIVER_DESC);
 MODULE_AUTHOR("Xiaochen Shen <xiaochen.shen@intel.com>");
 MODULE_VERSION(DRIVER_VERSION);
 MODULE_LICENSE("GPL");
-
diff --git a/drivers/usb/gadget/langwell_udc.h b/drivers/usb/gadget/langwell_udc.h
index 8c8087abb48..38fa3c86d85 100644
--- a/drivers/usb/gadget/langwell_udc.h
+++ b/drivers/usb/gadget/langwell_udc.h
@@ -116,7 +116,6 @@ struct langwell_ep {
 	unsigned long		irqs;
 	struct list_head	queue;
 	struct langwell_dqh	*dqh;
-	const struct usb_endpoint_descriptor	*desc;
 	char			name[14];
 	unsigned		stopped:1,
 				ep_type:2,
diff --git a/drivers/usb/gadget/m66592-udc.c b/drivers/usb/gadget/m66592-udc.c
index 3608b3bd573..8981fbb5748 100644
--- a/drivers/usb/gadget/m66592-udc.c
+++ b/drivers/usb/gadget/m66592-udc.c
@@ -390,7 +390,7 @@ static int alloc_pipe_config(struct m66592_ep *ep,
 	int *counter;
 	int ret;
 
-	ep->desc = desc;
+	ep->ep.desc = desc;
 
 	BUG_ON(ep->pipenum);
 
@@ -558,7 +558,7 @@ static void start_packet_read(struct m66592_ep *ep, struct m66592_request *req)
 
 static void start_packet(struct m66592_ep *ep, struct m66592_request *req)
 {
-	if (ep->desc->bEndpointAddress & USB_DIR_IN)
+	if (ep->ep.desc->bEndpointAddress & USB_DIR_IN)
 		start_packet_write(ep, req);
 	else
 		start_packet_read(ep, req);
@@ -734,7 +734,7 @@ __acquires(m66592->lock)
 
 	if (restart) {
 		req = list_entry(ep->queue.next, struct m66592_request, queue);
-		if (ep->desc)
+		if (ep->ep.desc)
 			start_packet(ep, req);
 	}
 }
@@ -917,7 +917,7 @@ static void irq_pipe_ready(struct m66592 *m66592, u16 status, u16 enb)
 				ep = m66592->pipenum2ep[pipenum];
 				req = list_entry(ep->queue.next,
 						 struct m66592_request, queue);
-				if (ep->desc->bEndpointAddress & USB_DIR_IN)
+				if (ep->ep.desc->bEndpointAddress & USB_DIR_IN)
 					irq_packet_write(ep, req);
 				else
 					irq_packet_read(ep, req);
@@ -1377,7 +1377,7 @@ static int m66592_queue(struct usb_ep *_ep, struct usb_request *_req,
 	req->req.actual = 0;
 	req->req.status = -EINPROGRESS;
 
-	if (ep->desc == NULL)	/* control */
+	if (ep->ep.desc == NULL)	/* control */
 		start_ep0(ep, req);
 	else {
 		if (request && !ep->busy)
diff --git a/drivers/usb/gadget/m66592-udc.h b/drivers/usb/gadget/m66592-udc.h
index 9d9f7e39f03..88c85b4116a 100644
--- a/drivers/usb/gadget/m66592-udc.h
+++ b/drivers/usb/gadget/m66592-udc.h
@@ -456,7 +456,7 @@ struct m66592_ep {
 	unsigned		use_dma:1;
 	u16			pipenum;
 	u16			type;
-	const struct usb_endpoint_descriptor	*desc;
+
 	/* register address */
 	unsigned long		fifoaddr;
 	unsigned long		fifosel;
diff --git a/drivers/usb/gadget/mv_udc.h b/drivers/usb/gadget/mv_udc.h
index e2be9519abb..9073436d8b2 100644
--- a/drivers/usb/gadget/mv_udc.h
+++ b/drivers/usb/gadget/mv_udc.h
@@ -232,7 +232,6 @@ struct mv_ep {
 	struct mv_udc		*udc;
 	struct list_head	queue;
 	struct mv_dqh		*dqh;
-	const struct usb_endpoint_descriptor	*desc;
 	u32			direction;
 	char			name[14];
 	unsigned		stopped:1,
diff --git a/drivers/usb/gadget/mv_udc_core.c b/drivers/usb/gadget/mv_udc_core.c
index a73cf406e2a..dbcd1329495 100644
--- a/drivers/usb/gadget/mv_udc_core.c
+++ b/drivers/usb/gadget/mv_udc_core.c
@@ -464,7 +464,7 @@ static int mv_ep_enable(struct usb_ep *_ep,
 	ep = container_of(_ep, struct mv_ep, ep);
 	udc = ep->udc;
 
-	if (!_ep || !desc || ep->desc
+	if (!_ep || !desc || ep->ep.desc
 			|| desc->bDescriptorType != USB_DT_ENDPOINT)
 		return -EINVAL;
 
@@ -528,7 +528,7 @@ static int mv_ep_enable(struct usb_ep *_ep,
 	dqh->size_ioc_int_sts = 0;
 
 	ep->ep.maxpacket = max;
-	ep->desc = desc;
+	ep->ep.desc = desc;
 	ep->stopped = 0;
 
 	/* Enable the endpoint for Rx or Tx and set the endpoint type */
@@ -580,7 +580,7 @@ static int  mv_ep_disable(struct usb_ep *_ep)
 	unsigned long flags;
 
 	ep = container_of(_ep, struct mv_ep, ep);
-	if ((_ep == NULL) || !ep->desc)
+	if ((_ep == NULL) || !ep->ep.desc)
 		return -EINVAL;
 
 	udc = ep->udc;
@@ -606,7 +606,6 @@ static int  mv_ep_disable(struct usb_ep *_ep)
 	/* nuke all pending requests (does flush) */
 	nuke(ep, -ESHUTDOWN);
 
-	ep->desc = NULL;
 	ep->ep.desc = NULL;
 	ep->stopped = 1;
 
@@ -651,7 +650,7 @@ static void mv_ep_fifo_flush(struct usb_ep *_ep)
 		return;
 
 	ep = container_of(_ep, struct mv_ep, ep);
-	if (!ep->desc)
+	if (!ep->ep.desc)
 		return;
 
 	udc = ep->udc;
@@ -715,11 +714,11 @@ mv_ep_queue(struct usb_ep *_ep, struct usb_request *_req, gfp_t gfp_flags)
 		dev_err(&udc->dev->dev, "%s, bad params", __func__);
 		return -EINVAL;
 	}
-	if (unlikely(!_ep || !ep->desc)) {
+	if (unlikely(!_ep || !ep->ep.desc)) {
 		dev_err(&udc->dev->dev, "%s, bad ep", __func__);
 		return -EINVAL;
 	}
-	if (ep->desc->bmAttributes == USB_ENDPOINT_XFER_ISOC) {
+	if (ep->ep.desc->bmAttributes == USB_ENDPOINT_XFER_ISOC) {
 		if (req->req.length > ep->ep.maxpacket)
 			return -EMSGSIZE;
 	}
@@ -925,12 +924,12 @@ static int mv_ep_set_halt_wedge(struct usb_ep *_ep, int halt, int wedge)
 
 	ep = container_of(_ep, struct mv_ep, ep);
 	udc = ep->udc;
-	if (!_ep || !ep->desc) {
+	if (!_ep || !ep->ep.desc) {
 		status = -EINVAL;
 		goto out;
 	}
 
-	if (ep->desc->bmAttributes == USB_ENDPOINT_XFER_ISOC) {
+	if (ep->ep.desc->bmAttributes == USB_ENDPOINT_XFER_ISOC) {
 		status = -EOPNOTSUPP;
 		goto out;
 	}
@@ -1279,7 +1278,7 @@ static int eps_init(struct mv_udc *udc)
 	ep->stopped = 0;
 	ep->ep.maxpacket = EP0_MAX_PKT_SIZE;
 	ep->ep_num = 0;
-	ep->desc = &mv_ep0_desc;
+	ep->ep.desc = &mv_ep0_desc;
 	INIT_LIST_HEAD(&ep->queue);
 
 	ep->ep_type = USB_ENDPOINT_XFER_CONTROL;
diff --git a/drivers/usb/gadget/omap_udc.c b/drivers/usb/gadget/omap_udc.c
index 3b4b6dd0f95..7ba32469c5b 100644
--- a/drivers/usb/gadget/omap_udc.c
+++ b/drivers/usb/gadget/omap_udc.c
@@ -153,7 +153,7 @@ static int omap_ep_enable(struct usb_ep *_ep,
 	u16		maxp;
 
 	/* catch various bogus parameters */
-	if (!_ep || !desc || ep->desc
+	if (!_ep || !desc || ep->ep.desc
 			|| desc->bDescriptorType != USB_DT_ENDPOINT
 			|| ep->bEndpointAddress != desc->bEndpointAddress
 			|| ep->maxpacket < usb_endpoint_maxp(desc)) {
@@ -200,7 +200,7 @@ static int omap_ep_enable(struct usb_ep *_ep,
 
 	spin_lock_irqsave(&udc->lock, flags);
 
-	ep->desc = desc;
+	ep->ep.desc = desc;
 	ep->irqs = 0;
 	ep->stopped = 0;
 	ep->ep.maxpacket = maxp;
@@ -242,14 +242,13 @@ static int omap_ep_disable(struct usb_ep *_ep)
 	struct omap_ep	*ep = container_of(_ep, struct omap_ep, ep);
 	unsigned long	flags;
 
-	if (!_ep || !ep->desc) {
+	if (!_ep || !ep->ep.desc) {
 		DBG("%s, %s not enabled\n", __func__,
 			_ep ? ep->ep.name : NULL);
 		return -EINVAL;
 	}
 
 	spin_lock_irqsave(&ep->udc->lock, flags);
-	ep->desc = NULL;
 	ep->ep.desc = NULL;
 	nuke (ep, -ESHUTDOWN);
 	ep->ep.maxpacket = ep->maxpacket;
@@ -917,7 +916,7 @@ omap_ep_queue(struct usb_ep *_ep, struct usb_request *_req, gfp_t gfp_flags)
 		DBG("%s, bad params\n", __func__);
 		return -EINVAL;
 	}
-	if (!_ep || (!ep->desc && ep->bEndpointAddress)) {
+	if (!_ep || (!ep->ep.desc && ep->bEndpointAddress)) {
 		DBG("%s, bad ep\n", __func__);
 		return -EINVAL;
 	}
@@ -1121,7 +1120,7 @@ static int omap_ep_set_halt(struct usb_ep *_ep, int value)
 			status = 0;
 
 	/* otherwise, all active non-ISO endpoints can halt */
-	} else if (ep->bmAttributes != USB_ENDPOINT_XFER_ISOC && ep->desc) {
+	} else if (ep->bmAttributes != USB_ENDPOINT_XFER_ISOC && ep->ep.desc) {
 
 		/* IN endpoints must already be idle */
 		if ((ep->bEndpointAddress & USB_DIR_IN)
@@ -1625,7 +1624,7 @@ static void ep0_irq(struct omap_udc *udc, u16 irq_src)
 				if (w_index & USB_DIR_IN)
 					ep += 16;
 				if (ep->bmAttributes == USB_ENDPOINT_XFER_ISOC
-						|| !ep->desc)
+						|| !ep->ep.desc)
 					goto do_stall;
 				use_ep(ep, 0);
 				omap_writew(udc->clr_halt, UDC_CTRL);
@@ -1653,7 +1652,7 @@ static void ep0_irq(struct omap_udc *udc, u16 irq_src)
 			if (w_index & USB_DIR_IN)
 				ep += 16;
 			if (ep->bmAttributes == USB_ENDPOINT_XFER_ISOC
-					|| ep == ep0 || !ep->desc)
+					|| ep == ep0 || !ep->ep.desc)
 				goto do_stall;
 			if (use_dma && ep->has_dma) {
 				/* this has rude side-effects (aborts) and
@@ -1688,7 +1687,7 @@ ep0out_status_stage:
 			ep = &udc->ep[w_index & 0xf];
 			if (w_index & USB_DIR_IN)
 				ep += 16;
-			if (!ep->desc)
+			if (!ep->ep.desc)
 				goto do_stall;
 
 			/* iso never stalls */
@@ -2509,7 +2508,7 @@ static int proc_udc_show(struct seq_file *s, void *_)
 		if (tmp & UDC_ADD) {
 			list_for_each_entry (ep, &udc->gadget.ep_list,
 					ep.ep_list) {
-				if (ep->desc)
+				if (ep->ep.desc)
 					proc_ep_show(s, ep);
 			}
 		}
diff --git a/drivers/usb/gadget/omap_udc.h b/drivers/usb/gadget/omap_udc.h
index 59d3b2213cb..cfadeb5fc5d 100644
--- a/drivers/usb/gadget/omap_udc.h
+++ b/drivers/usb/gadget/omap_udc.h
@@ -140,7 +140,6 @@ struct omap_ep {
 	struct list_head		queue;
 	unsigned long			irqs;
 	struct list_head		iso;
-	const struct usb_endpoint_descriptor	*desc;
 	char				name[14];
 	u16				maxpacket;
 	u8				bEndpointAddress;
diff --git a/drivers/usb/gadget/pch_udc.c b/drivers/usb/gadget/pch_udc.c
index 65307064a6f..1cfcc9ecbfb 100644
--- a/drivers/usb/gadget/pch_udc.c
+++ b/drivers/usb/gadget/pch_udc.c
@@ -295,7 +295,6 @@ struct pch_udc_ep {
 	struct pch_udc_data_dma_desc	*td_data;
 	struct pch_udc_dev		*dev;
 	unsigned long			offset_addr;
-	const struct usb_endpoint_descriptor	*desc;
 	struct list_head		queue;
 	unsigned			num:5,
 					in:1,
@@ -1705,7 +1704,7 @@ static int pch_udc_pcd_ep_enable(struct usb_ep *usbep,
 	if (!dev->driver || (dev->gadget.speed == USB_SPEED_UNKNOWN))
 		return -ESHUTDOWN;
 	spin_lock_irqsave(&dev->lock, iflags);
-	ep->desc = desc;
+	ep->ep.desc = desc;
 	ep->halted = 0;
 	pch_udc_ep_enable(ep, &ep->dev->cfg_data, desc);
 	ep->ep.maxpacket = usb_endpoint_maxp(desc);
@@ -1734,7 +1733,7 @@ static int pch_udc_pcd_ep_disable(struct usb_ep *usbep)
 
 	ep = container_of(usbep, struct pch_udc_ep, ep);
 	dev = ep->dev;
-	if ((usbep->name == ep0_string) || !ep->desc)
+	if ((usbep->name == ep0_string) || !ep->ep.desc)
 		return -EINVAL;
 
 	spin_lock_irqsave(&ep->dev->lock, iflags);
@@ -1742,7 +1741,6 @@ static int pch_udc_pcd_ep_disable(struct usb_ep *usbep)
 	ep->halted = 1;
 	pch_udc_ep_disable(ep);
 	pch_udc_disable_ep_interrupts(ep->dev, PCH_UDC_EPINT(ep->in, ep->num));
-	ep->desc = NULL;
 	ep->ep.desc = NULL;
 	INIT_LIST_HEAD(&ep->queue);
 	spin_unlock_irqrestore(&ep->dev->lock, iflags);
@@ -1849,7 +1847,7 @@ static int pch_udc_pcd_queue(struct usb_ep *usbep, struct usb_request *usbreq,
 		return -EINVAL;
 	ep = container_of(usbep, struct pch_udc_ep, ep);
 	dev = ep->dev;
-	if (!ep->desc && ep->num)
+	if (!ep->ep.desc && ep->num)
 		return -EINVAL;
 	req = container_of(usbreq, struct pch_udc_request, req);
 	if (!list_empty(&req->queue))
@@ -1949,7 +1947,7 @@ static int pch_udc_pcd_dequeue(struct usb_ep *usbep,
 
 	ep = container_of(usbep, struct pch_udc_ep, ep);
 	dev = ep->dev;
-	if (!usbep || !usbreq || (!ep->desc && ep->num))
+	if (!usbep || !usbreq || (!ep->ep.desc && ep->num))
 		return ret;
 	req = container_of(usbreq, struct pch_udc_request, req);
 	spin_lock_irqsave(&ep->dev->lock, flags);
@@ -1988,7 +1986,7 @@ static int pch_udc_pcd_set_halt(struct usb_ep *usbep, int halt)
 		return -EINVAL;
 	ep = container_of(usbep, struct pch_udc_ep, ep);
 	dev = ep->dev;
-	if (!ep->desc && !ep->num)
+	if (!ep->ep.desc && !ep->num)
 		return -EINVAL;
 	if (!ep->dev->driver || (ep->dev->gadget.speed == USB_SPEED_UNKNOWN))
 		return -ESHUTDOWN;
@@ -2033,7 +2031,7 @@ static int pch_udc_pcd_set_wedge(struct usb_ep *usbep)
 		return -EINVAL;
 	ep = container_of(usbep, struct pch_udc_ep, ep);
 	dev = ep->dev;
-	if (!ep->desc && !ep->num)
+	if (!ep->ep.desc && !ep->num)
 		return -EINVAL;
 	if (!ep->dev->driver || (ep->dev->gadget.speed == USB_SPEED_UNKNOWN))
 		return -ESHUTDOWN;
@@ -2065,7 +2063,7 @@ static void pch_udc_pcd_fifo_flush(struct usb_ep *usbep)
 		return;
 
 	ep = container_of(usbep, struct pch_udc_ep, ep);
-	if (ep->desc || !ep->num)
+	if (ep->ep.desc || !ep->num)
 		pch_udc_ep_fifo_flush(ep, ep->in);
 }
 
@@ -3282,7 +3280,6 @@ static DEFINE_PCI_DEVICE_TABLE(pch_udc_pcidev_id) = {
 
 MODULE_DEVICE_TABLE(pci, pch_udc_pcidev_id);
 
-
 static struct pci_driver pch_udc_driver = {
 	.name =	KBUILD_MODNAME,
 	.id_table =	pch_udc_pcidev_id,
@@ -3293,17 +3290,7 @@ static struct pci_driver pch_udc_driver = {
 	.shutdown =	pch_udc_shutdown,
 };
 
-static int __init pch_udc_pci_init(void)
-{
-	return pci_register_driver(&pch_udc_driver);
-}
-module_init(pch_udc_pci_init);
-
-static void __exit pch_udc_pci_exit(void)
-{
-	pci_unregister_driver(&pch_udc_driver);
-}
-module_exit(pch_udc_pci_exit);
+module_pci_driver(pch_udc_driver);
 
 MODULE_DESCRIPTION("Intel EG20T USB Device Controller");
 MODULE_AUTHOR("LAPIS Semiconductor, <tomoya-linux@dsn.lapis-semi.com>");
diff --git a/drivers/usb/gadget/printer.c b/drivers/usb/gadget/printer.c
index 4e4dc1f5f38..f1f9290a2f4 100644
--- a/drivers/usb/gadget/printer.c
+++ b/drivers/usb/gadget/printer.c
@@ -51,6 +51,7 @@
  * the runtime footprint, and giving us at least some parts of what
  * a "gcc --combine ... part1.c part2.c part3.c ... " build would.
  */
+#include "composite.c"
 #include "usbstring.c"
 #include "config.c"
 #include "epautoconf.c"
@@ -75,8 +76,6 @@ struct printer_dev {
 	/* lock buffer lists during read/write calls */
 	struct mutex		lock_printer_io;
 	struct usb_gadget	*gadget;
-	struct usb_request	*req;		/* for control responses */
-	u8			config;
 	s8			interface;
 	struct usb_ep		*in_ep, *out_ep;
 
@@ -100,6 +99,7 @@ struct printer_dev {
 	struct device		*pdev;
 	u8			printer_cdev_open;
 	wait_queue_head_t	wait;
+	struct usb_function	function;
 };
 
 static struct printer_dev usb_printer_gadget;
@@ -120,26 +120,6 @@ static struct printer_dev usb_printer_gadget;
  * parameters are in UTF-8 (superset of ASCII's 7 bit characters).
  */
 
-static ushort idVendor;
-module_param(idVendor, ushort, S_IRUGO);
-MODULE_PARM_DESC(idVendor, "USB Vendor ID");
-
-static ushort idProduct;
-module_param(idProduct, ushort, S_IRUGO);
-MODULE_PARM_DESC(idProduct, "USB Product ID");
-
-static ushort bcdDevice;
-module_param(bcdDevice, ushort, S_IRUGO);
-MODULE_PARM_DESC(bcdDevice, "USB Device version (BCD)");
-
-static char *iManufacturer;
-module_param(iManufacturer, charp, S_IRUGO);
-MODULE_PARM_DESC(iManufacturer, "USB Manufacturer string");
-
-static char *iProduct;
-module_param(iProduct, charp, S_IRUGO);
-MODULE_PARM_DESC(iProduct, "USB Product string");
-
 static char *iSerialNum;
 module_param(iSerialNum, charp, S_IRUGO);
 MODULE_PARM_DESC(iSerialNum, "1");
@@ -154,47 +134,8 @@ module_param(qlen, uint, S_IRUGO|S_IWUSR);
 
 #define QLEN	qlen
 
-#ifdef CONFIG_USB_GADGET_DUALSPEED
-#define DEVSPEED	USB_SPEED_HIGH
-#else   /* full speed (low speed doesn't do bulk) */
-#define DEVSPEED        USB_SPEED_FULL
-#endif
-
 /*-------------------------------------------------------------------------*/
 
-#define xprintk(d, level, fmt, args...) \
-	printk(level "%s: " fmt, DRIVER_DESC, ## args)
-
-#ifdef DEBUG
-#define DBG(dev, fmt, args...) \
-	xprintk(dev, KERN_DEBUG, fmt, ## args)
-#else
-#define DBG(dev, fmt, args...) \
-	do { } while (0)
-#endif /* DEBUG */
-
-#ifdef VERBOSE
-#define VDBG(dev, fmt, args...) \
-	xprintk(dev, KERN_DEBUG, fmt, ## args)
-#else
-#define VDBG(dev, fmt, args...) \
-	do { } while (0)
-#endif /* VERBOSE */
-
-#define ERROR(dev, fmt, args...) \
-	xprintk(dev, KERN_ERR, fmt, ## args)
-#define WARNING(dev, fmt, args...) \
-	xprintk(dev, KERN_WARNING, fmt, ## args)
-#define INFO(dev, fmt, args...) \
-	xprintk(dev, KERN_INFO, fmt, ## args)
-
-/*-------------------------------------------------------------------------*/
-
-/* USB DRIVER HOOKUP (to the hardware driver, below us), mostly
- * ep0 implementation:  descriptors, config management, setup().
- * also optional class-specific notification interrupt transfer.
- */
-
 /*
  * DESCRIPTORS ... most are static, but strings and (full) configuration
  * descriptors are built on demand.
@@ -227,24 +168,6 @@ static struct usb_device_descriptor device_desc = {
 	.bNumConfigurations =	1
 };
 
-static struct usb_otg_descriptor otg_desc = {
-	.bLength =		sizeof otg_desc,
-	.bDescriptorType =	USB_DT_OTG,
-	.bmAttributes =		USB_OTG_SRP
-};
-
-static struct usb_config_descriptor config_desc = {
-	.bLength =		sizeof config_desc,
-	.bDescriptorType =	USB_DT_CONFIG,
-
-	/* compute wTotalLength on the fly */
-	.bNumInterfaces =	1,
-	.bConfigurationValue =	DEV_CONFIG_VALUE,
-	.iConfiguration =	0,
-	.bmAttributes =		USB_CONFIG_ATT_ONE | USB_CONFIG_ATT_SELFPOWER,
-	.bMaxPower =		CONFIG_USB_GADGET_VBUS_DRAW / 2,
-};
-
 static struct usb_interface_descriptor intf_desc = {
 	.bLength =		sizeof intf_desc,
 	.bDescriptorType =	USB_DT_INTERFACE,
@@ -270,16 +193,13 @@ static struct usb_endpoint_descriptor fs_ep_out_desc = {
 	.bmAttributes =		USB_ENDPOINT_XFER_BULK
 };
 
-static const struct usb_descriptor_header *fs_printer_function [11] = {
-	(struct usb_descriptor_header *) &otg_desc,
+static struct usb_descriptor_header *fs_printer_function[] = {
 	(struct usb_descriptor_header *) &intf_desc,
 	(struct usb_descriptor_header *) &fs_ep_in_desc,
 	(struct usb_descriptor_header *) &fs_ep_out_desc,
 	NULL
 };
 
-#ifdef	CONFIG_USB_GADGET_DUALSPEED
-
 /*
  * usb 2.0 devices need to expose both high speed and full speed
  * descriptors, unless they only run at full speed.
@@ -307,23 +227,26 @@ static struct usb_qualifier_descriptor dev_qualifier = {
 	.bNumConfigurations =	1
 };
 
-static const struct usb_descriptor_header *hs_printer_function [11] = {
-	(struct usb_descriptor_header *) &otg_desc,
+static struct usb_descriptor_header *hs_printer_function[] = {
 	(struct usb_descriptor_header *) &intf_desc,
 	(struct usb_descriptor_header *) &hs_ep_in_desc,
 	(struct usb_descriptor_header *) &hs_ep_out_desc,
 	NULL
 };
 
-/* maxpacket and other transfer characteristics vary by speed. */
-#define ep_desc(g, hs, fs) (((g)->speed == USB_SPEED_HIGH)?(hs):(fs))
-
-#else
+static struct usb_otg_descriptor otg_descriptor = {
+	.bLength =              sizeof otg_descriptor,
+	.bDescriptorType =      USB_DT_OTG,
+	.bmAttributes =         USB_OTG_SRP,
+};
 
-/* if there's no high speed support, maxpacket doesn't change. */
-#define ep_desc(g, hs, fs) (((void)(g)), (fs))
+static const struct usb_descriptor_header *otg_desc[] = {
+	(struct usb_descriptor_header *) &otg_descriptor,
+	NULL,
+};
 
-#endif	/* !CONFIG_USB_GADGET_DUALSPEED */
+/* maxpacket and other transfer characteristics vary by speed. */
+#define ep_desc(g, hs, fs) (((g)->speed == USB_SPEED_HIGH)?(hs):(fs))
 
 /*-------------------------------------------------------------------------*/
 
@@ -343,11 +266,16 @@ static struct usb_string		strings [] = {
 	{  }		/* end of list */
 };
 
-static struct usb_gadget_strings	stringtab = {
+static struct usb_gadget_strings	stringtab_dev = {
 	.language	= 0x0409,	/* en-us */
 	.strings	= strings,
 };
 
+static struct usb_gadget_strings *dev_strings[] = {
+	&stringtab_dev,
+	NULL,
+};
+
 /*-------------------------------------------------------------------------*/
 
 static struct usb_request *
@@ -937,82 +865,8 @@ static void printer_reset_interface(struct printer_dev *dev)
 	dev->interface = -1;
 }
 
-/* change our operational config.  must agree with the code
- * that returns config descriptors, and altsetting code.
- */
-static int
-printer_set_config(struct printer_dev *dev, unsigned number)
-{
-	int			result = 0;
-	struct usb_gadget	*gadget = dev->gadget;
-
-	switch (number) {
-	case DEV_CONFIG_VALUE:
-		result = 0;
-		break;
-	default:
-		result = -EINVAL;
-		/* FALL THROUGH */
-	case 0:
-		break;
-	}
-
-	if (result) {
-		usb_gadget_vbus_draw(dev->gadget,
-				dev->gadget->is_otg ? 8 : 100);
-	} else {
-		unsigned power;
-
-		power = 2 * config_desc.bMaxPower;
-		usb_gadget_vbus_draw(dev->gadget, power);
-
-		dev->config = number;
-		INFO(dev, "%s config #%d: %d mA, %s\n",
-		     usb_speed_string(gadget->speed),
-		     number, power, driver_desc);
-	}
-	return result;
-}
-
-static int
-config_buf(enum usb_device_speed speed, u8 *buf, u8 type, unsigned index,
-		int is_otg)
-{
-	int					len;
-	const struct usb_descriptor_header	**function;
-#ifdef CONFIG_USB_GADGET_DUALSPEED
-	int					hs = (speed == USB_SPEED_HIGH);
-
-	if (type == USB_DT_OTHER_SPEED_CONFIG)
-		hs = !hs;
-
-	if (hs) {
-		function = hs_printer_function;
-	} else {
-		function = fs_printer_function;
-	}
-#else
-	function = fs_printer_function;
-#endif
-
-	if (index >= device_desc.bNumConfigurations)
-		return -EINVAL;
-
-	/* for now, don't advertise srp-only devices */
-	if (!is_otg)
-		function++;
-
-	len = usb_gadget_config_buf(&config_desc, buf, USB_DESC_BUFSIZE,
-			function);
-	if (len < 0)
-		return len;
-	((struct usb_config_descriptor *) buf)->bDescriptorType = type;
-	return len;
-}
-
 /* Change our operational Interface. */
-static int
-set_interface(struct printer_dev *dev, unsigned number)
+static int set_interface(struct printer_dev *dev, unsigned number)
 {
 	int			result = 0;
 
@@ -1043,14 +897,6 @@ set_interface(struct printer_dev *dev, unsigned number)
 	return result;
 }
 
-static void printer_setup_complete(struct usb_ep *ep, struct usb_request *req)
-{
-	if (req->status || req->actual != req->length)
-		DBG((struct printer_dev *) ep->driver_data,
-				"setup complete --> %d, %d/%d\n",
-				req->status, req->actual, req->length);
-}
-
 static void printer_soft_reset(struct printer_dev *dev)
 {
 	struct usb_request	*req;
@@ -1107,11 +953,12 @@ static void printer_soft_reset(struct printer_dev *dev)
  * The setup() callback implements all the ep0 functionality that's not
  * handled lower down.
  */
-static int
-printer_setup(struct usb_gadget *gadget, const struct usb_ctrlrequest *ctrl)
+static int printer_func_setup(struct usb_function *f,
+		const struct usb_ctrlrequest *ctrl)
 {
-	struct printer_dev	*dev = get_gadget_data(gadget);
-	struct usb_request	*req = dev->req;
+	struct printer_dev *dev = container_of(f, struct printer_dev, function);
+	struct usb_composite_dev *cdev = f->config->cdev;
+	struct usb_request	*req = cdev->req;
 	int			value = -EOPNOTSUPP;
 	u16			wIndex = le16_to_cpu(ctrl->wIndex);
 	u16			wValue = le16_to_cpu(ctrl->wValue);
@@ -1120,102 +967,7 @@ printer_setup(struct usb_gadget *gadget, const struct usb_ctrlrequest *ctrl)
 	DBG(dev, "ctrl req%02x.%02x v%04x i%04x l%d\n",
 		ctrl->bRequestType, ctrl->bRequest, wValue, wIndex, wLength);
 
-	req->complete = printer_setup_complete;
-
 	switch (ctrl->bRequestType&USB_TYPE_MASK) {
-
-	case USB_TYPE_STANDARD:
-		switch (ctrl->bRequest) {
-
-		case USB_REQ_GET_DESCRIPTOR:
-			if (ctrl->bRequestType != USB_DIR_IN)
-				break;
-			switch (wValue >> 8) {
-
-			case USB_DT_DEVICE:
-				device_desc.bMaxPacketSize0 =
-					gadget->ep0->maxpacket;
-				value = min(wLength, (u16) sizeof device_desc);
-				memcpy(req->buf, &device_desc, value);
-				break;
-#ifdef CONFIG_USB_GADGET_DUALSPEED
-			case USB_DT_DEVICE_QUALIFIER:
-				if (!gadget_is_dualspeed(gadget))
-					break;
-				/*
-				 * assumes ep0 uses the same value for both
-				 * speeds
-				 */
-				dev_qualifier.bMaxPacketSize0 =
-					gadget->ep0->maxpacket;
-				value = min(wLength,
-						(u16) sizeof dev_qualifier);
-				memcpy(req->buf, &dev_qualifier, value);
-				break;
-
-			case USB_DT_OTHER_SPEED_CONFIG:
-				if (!gadget_is_dualspeed(gadget))
-					break;
-				/* FALLTHROUGH */
-#endif /* CONFIG_USB_GADGET_DUALSPEED */
-			case USB_DT_CONFIG:
-				value = config_buf(gadget->speed, req->buf,
-						wValue >> 8,
-						wValue & 0xff,
-						gadget->is_otg);
-				if (value >= 0)
-					value = min(wLength, (u16) value);
-				break;
-
-			case USB_DT_STRING:
-				value = usb_gadget_get_string(&stringtab,
-						wValue & 0xff, req->buf);
-				if (value >= 0)
-					value = min(wLength, (u16) value);
-				break;
-			}
-			break;
-
-		case USB_REQ_SET_CONFIGURATION:
-			if (ctrl->bRequestType != 0)
-				break;
-			if (gadget->a_hnp_support)
-				DBG(dev, "HNP available\n");
-			else if (gadget->a_alt_hnp_support)
-				DBG(dev, "HNP needs a different root port\n");
-			value = printer_set_config(dev, wValue);
-			if (!value)
-				value = set_interface(dev, PRINTER_INTERFACE);
-			break;
-		case USB_REQ_GET_CONFIGURATION:
-			if (ctrl->bRequestType != USB_DIR_IN)
-				break;
-			*(u8 *)req->buf = dev->config;
-			value = min(wLength, (u16) 1);
-			break;
-
-		case USB_REQ_SET_INTERFACE:
-			if (ctrl->bRequestType != USB_RECIP_INTERFACE ||
-					!dev->config)
-				break;
-
-			value = set_interface(dev, PRINTER_INTERFACE);
-			break;
-		case USB_REQ_GET_INTERFACE:
-			if (ctrl->bRequestType !=
-					(USB_DIR_IN|USB_RECIP_INTERFACE)
-					|| !dev->config)
-				break;
-
-			*(u8 *)req->buf = dev->interface;
-			value = min(wLength, (u16) 1);
-			break;
-
-		default:
-			goto unknown;
-		}
-		break;
-
 	case USB_TYPE_CLASS:
 		switch (ctrl->bRequest) {
 		case 0: /* Get the IEEE-1284 PNP String */
@@ -1261,44 +1013,50 @@ unknown:
 			wValue, wIndex, wLength);
 		break;
 	}
-
-	/* respond with data transfer before status phase? */
-	if (value >= 0) {
-		req->length = value;
-		req->zero = value < wLength;
-		value = usb_ep_queue(gadget->ep0, req, GFP_ATOMIC);
-		if (value < 0) {
-			DBG(dev, "ep_queue --> %d\n", value);
-			req->status = 0;
-			printer_setup_complete(gadget->ep0, req);
-		}
-	}
-
 	/* host either stalls (value < 0) or reports success */
 	return value;
 }
 
-static void
-printer_disconnect(struct usb_gadget *gadget)
+static int __init printer_func_bind(struct usb_configuration *c,
+		struct usb_function *f)
 {
-	struct printer_dev	*dev = get_gadget_data(gadget);
+	return 0;
+}
+
+static void printer_func_unbind(struct usb_configuration *c,
+		struct usb_function *f)
+{
+}
+
+static int printer_func_set_alt(struct usb_function *f,
+		unsigned intf, unsigned alt)
+{
+	struct printer_dev *dev = container_of(f, struct printer_dev, function);
+	int ret = -ENOTSUPP;
+
+	if (!alt)
+		ret = set_interface(dev, PRINTER_INTERFACE);
+	return ret;
+}
+
+static void printer_func_disable(struct usb_function *f)
+{
+	struct printer_dev *dev = container_of(f, struct printer_dev, function);
 	unsigned long		flags;
 
 	DBG(dev, "%s\n", __func__);
 
 	spin_lock_irqsave(&dev->lock, flags);
-
 	printer_reset_interface(dev);
-
 	spin_unlock_irqrestore(&dev->lock, flags);
 }
 
-static void
-printer_unbind(struct usb_gadget *gadget)
+static void printer_cfg_unbind(struct usb_configuration *c)
 {
-	struct printer_dev	*dev = get_gadget_data(gadget);
+	struct printer_dev	*dev;
 	struct usb_request	*req;
 
+	dev = &usb_printer_gadget;
 
 	DBG(dev, "%s\n", __func__);
 
@@ -1336,18 +1094,18 @@ printer_unbind(struct usb_gadget *gadget)
 		list_del(&req->list);
 		printer_req_free(dev->out_ep, req);
 	}
-
-	if (dev->req) {
-		printer_req_free(gadget->ep0, dev->req);
-		dev->req = NULL;
-	}
-
-	set_gadget_data(gadget, NULL);
 }
 
-static int __init
-printer_bind(struct usb_gadget *gadget)
+static struct usb_configuration printer_cfg_driver = {
+	.label			= "printer",
+	.unbind			= printer_cfg_unbind,
+	.bConfigurationValue	= 1,
+	.bmAttributes		= USB_CONFIG_ATT_ONE | USB_CONFIG_ATT_SELFPOWER,
+};
+
+static int __init printer_bind_config(struct usb_configuration *c)
 {
+	struct usb_gadget	*gadget = c->cdev->gadget;
 	struct printer_dev	*dev;
 	struct usb_ep		*in_ep, *out_ep;
 	int			status = -ENOMEM;
@@ -1358,6 +1116,14 @@ printer_bind(struct usb_gadget *gadget)
 
 	dev = &usb_printer_gadget;
 
+	dev->function.name = shortname;
+	dev->function.descriptors = fs_printer_function;
+	dev->function.hs_descriptors = hs_printer_function;
+	dev->function.bind = printer_func_bind;
+	dev->function.setup = printer_func_setup;
+	dev->function.unbind = printer_func_unbind;
+	dev->function.set_alt = printer_func_set_alt;
+	dev->function.disable = printer_func_disable;
 
 	/* Setup the sysfs files for the printer gadget. */
 	dev->pdev = device_create(usb_gadget_class, NULL, g_printer_devno,
@@ -1393,29 +1159,6 @@ printer_bind(struct usb_gadget *gadget)
 		init_utsname()->sysname, init_utsname()->release,
 		gadget->name);
 
-	device_desc.idVendor =
-		cpu_to_le16(PRINTER_VENDOR_NUM);
-	device_desc.idProduct =
-		cpu_to_le16(PRINTER_PRODUCT_NUM);
-
-	/* support optional vendor/distro customization */
-	if (idVendor) {
-		if (!idProduct) {
-			dev_err(&gadget->dev, "idVendor needs idProduct!\n");
-			return -ENODEV;
-		}
-		device_desc.idVendor = cpu_to_le16(idVendor);
-		device_desc.idProduct = cpu_to_le16(idProduct);
-		if (bcdDevice)
-			device_desc.bcdDevice = cpu_to_le16(bcdDevice);
-	}
-
-	if (iManufacturer)
-		strlcpy(manufacturer, iManufacturer, sizeof manufacturer);
-
-	if (iProduct)
-		strlcpy(product_desc, iProduct, sizeof product_desc);
-
 	if (iSerialNum)
 		strlcpy(serial_num, iSerialNum, sizeof serial_num);
 
@@ -1442,17 +1185,16 @@ autoconf_fail:
 		goto autoconf_fail;
 	out_ep->driver_data = out_ep;	/* claim */
 
-#ifdef	CONFIG_USB_GADGET_DUALSPEED
 	/* assumes that all endpoints are dual-speed */
 	hs_ep_in_desc.bEndpointAddress = fs_ep_in_desc.bEndpointAddress;
 	hs_ep_out_desc.bEndpointAddress = fs_ep_out_desc.bEndpointAddress;
-#endif	/* DUALSPEED */
 
 	usb_gadget_set_selfpowered(gadget);
 
 	if (gadget->is_otg) {
-		otg_desc.bmAttributes |= USB_OTG_HNP,
-		config_desc.bmAttributes |= USB_CONFIG_ATT_WAKEUP;
+		otg_descriptor.bmAttributes |= USB_OTG_HNP;
+		printer_cfg_driver.descriptors = otg_desc;
+		printer_cfg_driver.bmAttributes |= USB_CONFIG_ATT_WAKEUP;
 	}
 
 	spin_lock_init(&dev->lock);
@@ -1466,7 +1208,6 @@ autoconf_fail:
 	init_waitqueue_head(&dev->tx_wait);
 	init_waitqueue_head(&dev->tx_flush_wait);
 
-	dev->config = 0;
 	dev->interface = -1;
 	dev->printer_cdev_open = 0;
 	dev->printer_status = PRINTER_NOT_ERROR;
@@ -1477,14 +1218,6 @@ autoconf_fail:
 	dev->in_ep = in_ep;
 	dev->out_ep = out_ep;
 
-	/* preallocate control message data and buffer */
-	dev->req = printer_req_alloc(gadget->ep0, USB_DESC_BUFSIZE,
-			GFP_KERNEL);
-	if (!dev->req) {
-		status = -ENOMEM;
-		goto fail;
-	}
-
 	for (i = 0; i < QLEN; i++) {
 		req = printer_req_alloc(dev->in_ep, USB_BUFSIZE, GFP_KERNEL);
 		if (!req) {
@@ -1513,45 +1246,37 @@ autoconf_fail:
 		list_add(&req->list, &dev->rx_reqs);
 	}
 
-	dev->req->complete = printer_setup_complete;
-
 	/* finish hookup to lower layer ... */
 	dev->gadget = gadget;
-	set_gadget_data(gadget, dev);
-	gadget->ep0->driver_data = dev;
 
 	INFO(dev, "%s, version: " DRIVER_VERSION "\n", driver_desc);
 	INFO(dev, "using %s, OUT %s IN %s\n", gadget->name, out_ep->name,
 			in_ep->name);
-
 	return 0;
 
 fail:
-	printer_unbind(gadget);
+	printer_cfg_unbind(c);
 	return status;
 }
 
-/*-------------------------------------------------------------------------*/
+static int printer_unbind(struct usb_composite_dev *cdev)
+{
+	return 0;
+}
 
-static struct usb_gadget_driver printer_driver = {
-	.max_speed	= DEVSPEED,
+static int __init printer_bind(struct usb_composite_dev *cdev)
+{
+	return usb_add_config(cdev, &printer_cfg_driver, printer_bind_config);
+}
 
-	.function	= (char *) driver_desc,
+static struct usb_composite_driver printer_driver = {
+	.name           = shortname,
+	.dev            = &device_desc,
+	.strings        = dev_strings,
+	.max_speed      = USB_SPEED_HIGH,
 	.unbind		= printer_unbind,
-
-	.setup		= printer_setup,
-	.disconnect	= printer_disconnect,
-
-	.driver		= {
-		.name		= (char *) shortname,
-		.owner		= THIS_MODULE,
-	},
 };
 
-MODULE_DESCRIPTION(DRIVER_DESC);
-MODULE_AUTHOR("Craig Nadler");
-MODULE_LICENSE("GPL");
-
 static int __init
 init(void)
 {
@@ -1560,23 +1285,23 @@ init(void)
 	usb_gadget_class = class_create(THIS_MODULE, "usb_printer_gadget");
 	if (IS_ERR(usb_gadget_class)) {
 		status = PTR_ERR(usb_gadget_class);
-		ERROR(dev, "unable to create usb_gadget class %d\n", status);
+		pr_err("unable to create usb_gadget class %d\n", status);
 		return status;
 	}
 
 	status = alloc_chrdev_region(&g_printer_devno, 0, 1,
 			"USB printer gadget");
 	if (status) {
-		ERROR(dev, "alloc_chrdev_region %d\n", status);
+		pr_err("alloc_chrdev_region %d\n", status);
 		class_destroy(usb_gadget_class);
 		return status;
 	}
 
-	status = usb_gadget_probe_driver(&printer_driver, printer_bind);
+	status = usb_composite_probe(&printer_driver, printer_bind);
 	if (status) {
 		class_destroy(usb_gadget_class);
 		unregister_chrdev_region(g_printer_devno, 1);
-		DBG(dev, "usb_gadget_probe_driver %x\n", status);
+		pr_err("usb_gadget_probe_driver %x\n", status);
 	}
 
 	return status;
@@ -1586,15 +1311,14 @@ module_init(init);
 static void __exit
 cleanup(void)
 {
-	int status;
-
 	mutex_lock(&usb_printer_gadget.lock_printer_io);
-	status = usb_gadget_unregister_driver(&printer_driver);
-	if (status)
-		ERROR(dev, "usb_gadget_unregister_driver %x\n", status);
-
+	usb_composite_unregister(&printer_driver);
 	unregister_chrdev_region(g_printer_devno, 1);
 	class_destroy(usb_gadget_class);
 	mutex_unlock(&usb_printer_gadget.lock_printer_io);
 }
 module_exit(cleanup);
+
+MODULE_DESCRIPTION(DRIVER_DESC);
+MODULE_AUTHOR("Craig Nadler");
+MODULE_LICENSE("GPL");
diff --git a/drivers/usb/gadget/pxa25x_udc.c b/drivers/usb/gadget/pxa25x_udc.c
index 41ed69c96d8..d7c8cb3bf75 100644
--- a/drivers/usb/gadget/pxa25x_udc.c
+++ b/drivers/usb/gadget/pxa25x_udc.c
@@ -218,7 +218,7 @@ static int pxa25x_ep_enable (struct usb_ep *_ep,
 	struct pxa25x_udc       *dev;
 
 	ep = container_of (_ep, struct pxa25x_ep, ep);
-	if (!_ep || !desc || ep->desc || _ep->name == ep0name
+	if (!_ep || !desc || ep->ep.desc || _ep->name == ep0name
 			|| desc->bDescriptorType != USB_DT_ENDPOINT
 			|| ep->bEndpointAddress != desc->bEndpointAddress
 			|| ep->fifo_size < usb_endpoint_maxp (desc)) {
@@ -249,7 +249,7 @@ static int pxa25x_ep_enable (struct usb_ep *_ep,
 		return -ESHUTDOWN;
 	}
 
-	ep->desc = desc;
+	ep->ep.desc = desc;
 	ep->stopped = 0;
 	ep->pio_irqs = 0;
 	ep->ep.maxpacket = usb_endpoint_maxp (desc);
@@ -269,7 +269,7 @@ static int pxa25x_ep_disable (struct usb_ep *_ep)
 	unsigned long		flags;
 
 	ep = container_of (_ep, struct pxa25x_ep, ep);
-	if (!_ep || !ep->desc) {
+	if (!_ep || !ep->ep.desc) {
 		DMSG("%s, %s not enabled\n", __func__,
 			_ep ? ep->ep.name : NULL);
 		return -EINVAL;
@@ -281,7 +281,6 @@ static int pxa25x_ep_disable (struct usb_ep *_ep)
 	/* flush fifo (mostly for IN buffers) */
 	pxa25x_ep_fifo_flush (_ep);
 
-	ep->desc = NULL;
 	ep->ep.desc = NULL;
 	ep->stopped = 1;
 
@@ -390,7 +389,7 @@ write_fifo (struct pxa25x_ep *ep, struct pxa25x_request *req)
 {
 	unsigned		max;
 
-	max = usb_endpoint_maxp(ep->desc);
+	max = usb_endpoint_maxp(ep->ep.desc);
 	do {
 		unsigned	count;
 		int		is_last, is_short;
@@ -644,7 +643,7 @@ pxa25x_ep_queue(struct usb_ep *_ep, struct usb_request *_req, gfp_t gfp_flags)
 	}
 
 	ep = container_of(_ep, struct pxa25x_ep, ep);
-	if (unlikely (!_ep || (!ep->desc && ep->ep.name != ep0name))) {
+	if (unlikely(!_ep || (!ep->ep.desc && ep->ep.name != ep0name))) {
 		DMSG("%s, bad ep\n", __func__);
 		return -EINVAL;
 	}
@@ -660,7 +659,7 @@ pxa25x_ep_queue(struct usb_ep *_ep, struct usb_request *_req, gfp_t gfp_flags)
 	 * we can report per-packet status.  that also helps with dma.
 	 */
 	if (unlikely (ep->bmAttributes == USB_ENDPOINT_XFER_ISOC
-		        && req->req.length > usb_endpoint_maxp (ep->desc)))
+			&& req->req.length > usb_endpoint_maxp(ep->ep.desc)))
 		return -EMSGSIZE;
 
 	DBG(DBG_NOISY, "%s queue req %p, len %d buf %p\n",
@@ -673,7 +672,7 @@ pxa25x_ep_queue(struct usb_ep *_ep, struct usb_request *_req, gfp_t gfp_flags)
 
 	/* kickstart this i/o queue? */
 	if (list_empty(&ep->queue) && !ep->stopped) {
-		if (ep->desc == NULL/* ep0 */) {
+		if (ep->ep.desc == NULL/* ep0 */) {
 			unsigned	length = _req->length;
 
 			switch (dev->ep0state) {
@@ -722,7 +721,7 @@ pxa25x_ep_queue(struct usb_ep *_ep, struct usb_request *_req, gfp_t gfp_flags)
 			req = NULL;
 		}
 
-		if (likely (req && ep->desc))
+		if (likely(req && ep->ep.desc))
 			pio_irq_enable(ep->bEndpointAddress);
 	}
 
@@ -749,7 +748,7 @@ static void nuke(struct pxa25x_ep *ep, int status)
 				queue);
 		done(ep, req, status);
 	}
-	if (ep->desc)
+	if (ep->ep.desc)
 		pio_irq_disable (ep->bEndpointAddress);
 }
 
@@ -792,7 +791,7 @@ static int pxa25x_ep_set_halt(struct usb_ep *_ep, int value)
 
 	ep = container_of(_ep, struct pxa25x_ep, ep);
 	if (unlikely (!_ep
-			|| (!ep->desc && ep->ep.name != ep0name))
+			|| (!ep->ep.desc && ep->ep.name != ep0name))
 			|| ep->bmAttributes == USB_ENDPOINT_XFER_ISOC) {
 		DMSG("%s, bad ep\n", __func__);
 		return -EINVAL;
@@ -820,7 +819,7 @@ static int pxa25x_ep_set_halt(struct usb_ep *_ep, int value)
 	*ep->reg_udccs = UDCCS_BI_FST|UDCCS_BI_FTF;
 
 	/* ep0 needs special care */
-	if (!ep->desc) {
+	if (!ep->ep.desc) {
 		start_watchdog(ep->dev);
 		ep->dev->req_pending = 0;
 		ep->dev->ep0state = EP0_STALL;
@@ -1087,7 +1086,7 @@ udc_seq_show(struct seq_file *m, void *_d)
 		if (i != 0) {
 			const struct usb_endpoint_descriptor	*desc;
 
-			desc = ep->desc;
+			desc = ep->ep.desc;
 			if (!desc)
 				continue;
 			tmp = *dev->ep [i].reg_udccs;
@@ -1191,7 +1190,6 @@ static void udc_reinit(struct pxa25x_udc *dev)
 		if (i != 0)
 			list_add_tail (&ep->ep.ep_list, &dev->gadget.ep_list);
 
-		ep->desc = NULL;
 		ep->ep.desc = NULL;
 		ep->stopped = 0;
 		INIT_LIST_HEAD (&ep->queue);
diff --git a/drivers/usb/gadget/pxa25x_udc.h b/drivers/usb/gadget/pxa25x_udc.h
index 893e917f048..861f4df6ea2 100644
--- a/drivers/usb/gadget/pxa25x_udc.h
+++ b/drivers/usb/gadget/pxa25x_udc.h
@@ -41,7 +41,6 @@ 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;
 
diff --git a/drivers/usb/gadget/r8a66597-udc.c b/drivers/usb/gadget/r8a66597-udc.c
index c4401e7dd3a..f3ac2a20c27 100644
--- a/drivers/usb/gadget/r8a66597-udc.c
+++ b/drivers/usb/gadget/r8a66597-udc.c
@@ -459,7 +459,7 @@ static int alloc_pipe_config(struct r8a66597_ep *ep,
 	unsigned char *counter;
 	int ret;
 
-	ep->desc = desc;
+	ep->ep.desc = desc;
 
 	if (ep->pipenum)	/* already allocated pipe  */
 		return 0;
@@ -648,7 +648,7 @@ static int sudmac_alloc_channel(struct r8a66597 *r8a66597,
 	/* set SUDMAC parameters */
 	dma = &r8a66597->dma;
 	dma->used = 1;
-	if (ep->desc->bEndpointAddress & USB_DIR_IN) {
+	if (ep->ep.desc->bEndpointAddress & USB_DIR_IN) {
 		dma->dir = 1;
 	} else {
 		dma->dir = 0;
@@ -770,7 +770,7 @@ static void start_packet_read(struct r8a66597_ep *ep,
 
 static void start_packet(struct r8a66597_ep *ep, struct r8a66597_request *req)
 {
-	if (ep->desc->bEndpointAddress & USB_DIR_IN)
+	if (ep->ep.desc->bEndpointAddress & USB_DIR_IN)
 		start_packet_write(ep, req);
 	else
 		start_packet_read(ep, req);
@@ -930,7 +930,7 @@ __acquires(r8a66597->lock)
 
 	if (restart) {
 		req = get_request_from_ep(ep);
-		if (ep->desc)
+		if (ep->ep.desc)
 			start_packet(ep, req);
 	}
 }
@@ -1116,7 +1116,7 @@ static void irq_pipe_ready(struct r8a66597 *r8a66597, u16 status, u16 enb)
 				r8a66597_write(r8a66597, ~check, BRDYSTS);
 				ep = r8a66597->pipenum2ep[pipenum];
 				req = get_request_from_ep(ep);
-				if (ep->desc->bEndpointAddress & USB_DIR_IN)
+				if (ep->ep.desc->bEndpointAddress & USB_DIR_IN)
 					irq_packet_write(ep, req);
 				else
 					irq_packet_read(ep, req);
@@ -1170,7 +1170,7 @@ __acquires(r8a66597->lock)
 
 	switch (ctrl->bRequestType & USB_RECIP_MASK) {
 	case USB_RECIP_DEVICE:
-		status = 1 << USB_DEVICE_SELF_POWERED;
+		status = r8a66597->device_status;
 		break;
 	case USB_RECIP_INTERFACE:
 		status = 0;
@@ -1627,7 +1627,7 @@ static int r8a66597_queue(struct usb_ep *_ep, struct usb_request *_req,
 	req->req.actual = 0;
 	req->req.status = -EINPROGRESS;
 
-	if (ep->desc == NULL)	/* control */
+	if (ep->ep.desc == NULL)	/* control */
 		start_ep0(ep, req);
 	else {
 		if (request && !ep->busy)
@@ -1692,7 +1692,7 @@ static int r8a66597_set_wedge(struct usb_ep *_ep)
 
 	ep = container_of(_ep, struct r8a66597_ep, ep);
 
-	if (!ep || !ep->desc)
+	if (!ep || !ep->ep.desc)
 		return -EINVAL;
 
 	spin_lock_irqsave(&ep->r8a66597->lock, flags);
@@ -1800,11 +1800,24 @@ static int r8a66597_pullup(struct usb_gadget *gadget, int is_on)
 	return 0;
 }
 
+static int r8a66597_set_selfpowered(struct usb_gadget *gadget, int is_self)
+{
+	struct r8a66597 *r8a66597 = gadget_to_r8a66597(gadget);
+
+	if (is_self)
+		r8a66597->device_status |= 1 << USB_DEVICE_SELF_POWERED;
+	else
+		r8a66597->device_status &= ~(1 << USB_DEVICE_SELF_POWERED);
+
+	return 0;
+}
+
 static struct usb_gadget_ops r8a66597_gadget_ops = {
 	.get_frame		= r8a66597_get_frame,
 	.udc_start		= r8a66597_start,
 	.udc_stop		= r8a66597_stop,
 	.pullup			= r8a66597_pullup,
+	.set_selfpowered	= r8a66597_set_selfpowered,
 };
 
 static int __exit r8a66597_remove(struct platform_device *pdev)
diff --git a/drivers/usb/gadget/r8a66597-udc.h b/drivers/usb/gadget/r8a66597-udc.h
index 8e3de61cd4b..99908c76ccd 100644
--- a/drivers/usb/gadget/r8a66597-udc.h
+++ b/drivers/usb/gadget/r8a66597-udc.h
@@ -72,7 +72,7 @@ struct r8a66597_ep {
 	unsigned		use_dma:1;
 	u16			pipenum;
 	u16			type;
-	const struct usb_endpoint_descriptor	*desc;
+
 	/* register address */
 	unsigned char		fifoaddr;
 	unsigned char		fifosel;
@@ -111,6 +111,7 @@ struct r8a66597 {
 	u16			old_vbus;
 	u16			scount;
 	u16			old_dvsq;
+	u16			device_status;	/* for GET_STATUS */
 
 	/* pipe config */
 	unsigned char bulk;
diff --git a/drivers/usb/gadget/s3c-hsotg.c b/drivers/usb/gadget/s3c-hsotg.c
index 105b206cd84..5061a2fe962 100644
--- a/drivers/usb/gadget/s3c-hsotg.c
+++ b/drivers/usb/gadget/s3c-hsotg.c
@@ -1,4 +1,5 @@
-/* linux/drivers/usb/gadget/s3c-hsotg.c
+/**
+ * linux/drivers/usb/gadget/s3c-hsotg.c
  *
  * Copyright (c) 2011 Samsung Electronics Co., Ltd.
  *		http://www.samsung.com
@@ -13,7 +14,7 @@
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 2 as
  * published by the Free Software Foundation.
-*/
+ */
 
 #include <linux/kernel.h>
 #include <linux/module.h>
@@ -27,21 +28,25 @@
 #include <linux/io.h>
 #include <linux/slab.h>
 #include <linux/clk.h>
+#include <linux/regulator/consumer.h>
 
 #include <linux/usb/ch9.h>
 #include <linux/usb/gadget.h>
 
 #include <mach/map.h>
 
-#include <plat/regs-usb-hsotg-phy.h>
-#include <plat/regs-usb-hsotg.h>
-#include <mach/regs-sys.h>
-#include <plat/udc-hs.h>
-#include <plat/cpu.h>
+#include "s3c-hsotg.h"
+#include <linux/platform_data/s3c-hsotg.h>
 
 #define DMA_ADDR_INVALID (~((dma_addr_t)0))
 
-/* EP0_MPS_LIMIT
+static const char * const s3c_hsotg_supply_names[] = {
+	"vusb_d",		/* digital USB supply, 1.2V */
+	"vusb_a",		/* analog USB supply, 1.1V */
+};
+
+/*
+ * EP0_MPS_LIMIT
  *
  * Unfortunately there seems to be a limit of the amount of data that can
  * be transferred by IN transactions on EP0. This is either 127 bytes or 3
@@ -125,8 +130,6 @@ struct s3c_hsotg_ep {
 	char			name[10];
 };
 
-#define S3C_HSOTG_EPS	(8+1)	/* limit to 9 for the moment */
-
 /**
  * struct s3c_hsotg - driver state.
  * @dev: The parent device supplied to the probe function
@@ -135,7 +138,9 @@ struct s3c_hsotg_ep {
  * @regs: The memory area mapped for accessing registers.
  * @regs_res: The resource that was allocated when claiming register space.
  * @irq: The IRQ number we are using
+ * @supplies: Definition of USB power supplies
  * @dedicated_fifos: Set if the hardware has dedicated IN-EP fifos.
+ * @num_of_eps: Number of available EPs (excluding EP0)
  * @debug_root: root directrory for debugfs.
  * @debug_file: main status file for debugfs.
  * @debug_fifo: FIFO status file for debugfs.
@@ -143,6 +148,8 @@ struct s3c_hsotg_ep {
  * @ep0_buff: Buffer for EP0 reply data, if needed.
  * @ctrl_buff: Buffer for EP0 control requests.
  * @ctrl_req: Request for EP0 control packets.
+ * @setup: NAK management for EP0 SETUP
+ * @last_rst: Time of last reset
  * @eps: The endpoints being supplied to the gadget framework
  */
 struct s3c_hsotg {
@@ -155,7 +162,10 @@ struct s3c_hsotg {
 	int			irq;
 	struct clk		*clk;
 
+	struct regulator_bulk_data supplies[ARRAY_SIZE(s3c_hsotg_supply_names)];
+
 	unsigned int		dedicated_fifos:1;
+	unsigned char           num_of_eps;
 
 	struct dentry		*debug_root;
 	struct dentry		*debug_file;
@@ -167,7 +177,9 @@ struct s3c_hsotg {
 	u8			ctrl_buff[8];
 
 	struct usb_gadget	gadget;
-	struct s3c_hsotg_ep	eps[];
+	unsigned int		setup;
+	unsigned long           last_rst;
+	struct s3c_hsotg_ep	*eps;
 };
 
 /**
@@ -244,14 +256,14 @@ static inline bool using_dma(struct s3c_hsotg *hsotg)
  */
 static void s3c_hsotg_en_gsint(struct s3c_hsotg *hsotg, u32 ints)
 {
-	u32 gsintmsk = readl(hsotg->regs + S3C_GINTMSK);
+	u32 gsintmsk = readl(hsotg->regs + GINTMSK);
 	u32 new_gsintmsk;
 
 	new_gsintmsk = gsintmsk | ints;
 
 	if (new_gsintmsk != gsintmsk) {
 		dev_dbg(hsotg->dev, "gsintmsk now 0x%08x\n", new_gsintmsk);
-		writel(new_gsintmsk, hsotg->regs + S3C_GINTMSK);
+		writel(new_gsintmsk, hsotg->regs + GINTMSK);
 	}
 }
 
@@ -262,13 +274,13 @@ static void s3c_hsotg_en_gsint(struct s3c_hsotg *hsotg, u32 ints)
  */
 static void s3c_hsotg_disable_gsint(struct s3c_hsotg *hsotg, u32 ints)
 {
-	u32 gsintmsk = readl(hsotg->regs + S3C_GINTMSK);
+	u32 gsintmsk = readl(hsotg->regs + GINTMSK);
 	u32 new_gsintmsk;
 
 	new_gsintmsk = gsintmsk & ~ints;
 
 	if (new_gsintmsk != gsintmsk)
-		writel(new_gsintmsk, hsotg->regs + S3C_GINTMSK);
+		writel(new_gsintmsk, hsotg->regs + GINTMSK);
 }
 
 /**
@@ -293,12 +305,12 @@ static void s3c_hsotg_ctrl_epint(struct s3c_hsotg *hsotg,
 		bit <<= 16;
 
 	local_irq_save(flags);
-	daint = readl(hsotg->regs + S3C_DAINTMSK);
+	daint = readl(hsotg->regs + DAINTMSK);
 	if (en)
 		daint |= bit;
 	else
 		daint &= ~bit;
-	writel(daint, hsotg->regs + S3C_DAINTMSK);
+	writel(daint, hsotg->regs + DAINTMSK);
 	local_irq_restore(flags);
 }
 
@@ -314,52 +326,51 @@ static void s3c_hsotg_init_fifo(struct s3c_hsotg *hsotg)
 	int timeout;
 	u32 val;
 
-	/* the ryu 2.6.24 release ahs
-	   writel(0x1C0, hsotg->regs + S3C_GRXFSIZ);
-	   writel(S3C_GNPTXFSIZ_NPTxFStAddr(0x200) |
-		S3C_GNPTXFSIZ_NPTxFDep(0x1C0),
-		hsotg->regs + S3C_GNPTXFSIZ);
-	*/
-
 	/* set FIFO sizes to 2048/1024 */
 
-	writel(2048, hsotg->regs + S3C_GRXFSIZ);
-	writel(S3C_GNPTXFSIZ_NPTxFStAddr(2048) |
-	       S3C_GNPTXFSIZ_NPTxFDep(1024),
-	       hsotg->regs + S3C_GNPTXFSIZ);
+	writel(2048, hsotg->regs + GRXFSIZ);
+	writel(GNPTXFSIZ_NPTxFStAddr(2048) |
+	       GNPTXFSIZ_NPTxFDep(1024),
+	       hsotg->regs + GNPTXFSIZ);
 
-	/* arange all the rest of the TX FIFOs, as some versions of this
+	/*
+	 * arange all the rest of the TX FIFOs, as some versions of this
 	 * block have overlapping default addresses. This also ensures
 	 * that if the settings have been changed, then they are set to
-	 * known values. */
+	 * known values.
+	 */
 
 	/* start at the end of the GNPTXFSIZ, rounded up */
 	addr = 2048 + 1024;
 	size = 768;
 
-	/* currently we allocate TX FIFOs for all possible endpoints,
-	 * and assume that they are all the same size. */
+	/*
+	 * currently we allocate TX FIFOs for all possible endpoints,
+	 * and assume that they are all the same size.
+	 */
 
 	for (ep = 1; ep <= 15; ep++) {
 		val = addr;
-		val |= size << S3C_DPTXFSIZn_DPTxFSize_SHIFT;
+		val |= size << DPTXFSIZn_DPTxFSize_SHIFT;
 		addr += size;
 
-		writel(val, hsotg->regs + S3C_DPTXFSIZn(ep));
+		writel(val, hsotg->regs + DPTXFSIZn(ep));
 	}
 
-	/* according to p428 of the design guide, we need to ensure that
-	 * all fifos are flushed before continuing */
+	/*
+	 * according to p428 of the design guide, we need to ensure that
+	 * all fifos are flushed before continuing
+	 */
 
-	writel(S3C_GRSTCTL_TxFNum(0x10) | S3C_GRSTCTL_TxFFlsh |
-	       S3C_GRSTCTL_RxFFlsh, hsotg->regs + S3C_GRSTCTL);
+	writel(GRSTCTL_TxFNum(0x10) | GRSTCTL_TxFFlsh |
+	       GRSTCTL_RxFFlsh, hsotg->regs + GRSTCTL);
 
 	/* wait until the fifos are both flushed */
 	timeout = 100;
 	while (1) {
-		val = readl(hsotg->regs + S3C_GRSTCTL);
+		val = readl(hsotg->regs + GRSTCTL);
 
-		if ((val & (S3C_GRSTCTL_TxFFlsh | S3C_GRSTCTL_RxFFlsh)) == 0)
+		if ((val & (GRSTCTL_TxFFlsh | GRSTCTL_RxFFlsh)) == 0)
 			break;
 
 		if (--timeout == 0) {
@@ -415,7 +426,7 @@ static inline int is_ep_periodic(struct s3c_hsotg_ep *hs_ep)
  *
  * This is the reverse of s3c_hsotg_map_dma(), called for the completion
  * of a request to ensure the buffer is ready for access by the caller.
-*/
+ */
 static void s3c_hsotg_unmap_dma(struct s3c_hsotg *hsotg,
 				struct s3c_hsotg_ep *hs_ep,
 				struct s3c_hsotg_req *hs_req)
@@ -456,13 +467,13 @@ static void s3c_hsotg_unmap_dma(struct s3c_hsotg *hsotg,
  * otherwise -ENOSPC is returned if the FIFO space was used up.
  *
  * This routine is only needed for PIO
-*/
+ */
 static int s3c_hsotg_write_fifo(struct s3c_hsotg *hsotg,
 				struct s3c_hsotg_ep *hs_ep,
 				struct s3c_hsotg_req *hs_req)
 {
 	bool periodic = is_ep_periodic(hs_ep);
-	u32 gnptxsts = readl(hsotg->regs + S3C_GNPTXSTS);
+	u32 gnptxsts = readl(hsotg->regs + GNPTXSTS);
 	int buf_pos = hs_req->req.actual;
 	int to_write = hs_ep->size_loaded;
 	void *data;
@@ -476,20 +487,23 @@ static int s3c_hsotg_write_fifo(struct s3c_hsotg *hsotg,
 		return 0;
 
 	if (periodic && !hsotg->dedicated_fifos) {
-		u32 epsize = readl(hsotg->regs + S3C_DIEPTSIZ(hs_ep->index));
+		u32 epsize = readl(hsotg->regs + DIEPTSIZ(hs_ep->index));
 		int size_left;
 		int size_done;
 
-		/* work out how much data was loaded so we can calculate
-		 * how much data is left in the fifo. */
+		/*
+		 * work out how much data was loaded so we can calculate
+		 * how much data is left in the fifo.
+		 */
 
-		size_left = S3C_DxEPTSIZ_XferSize_GET(epsize);
+		size_left = DxEPTSIZ_XferSize_GET(epsize);
 
-		/* if shared fifo, we cannot write anything until the
+		/*
+		 * if shared fifo, we cannot write anything until the
 		 * previous data has been completely sent.
 		 */
 		if (hs_ep->fifo_load != 0) {
-			s3c_hsotg_en_gsint(hsotg, S3C_GINTSTS_PTxFEmp);
+			s3c_hsotg_en_gsint(hsotg, GINTSTS_PTxFEmp);
 			return -ENOSPC;
 		}
 
@@ -510,47 +524,50 @@ static int s3c_hsotg_write_fifo(struct s3c_hsotg *hsotg,
 			__func__, can_write);
 
 		if (can_write <= 0) {
-			s3c_hsotg_en_gsint(hsotg, S3C_GINTSTS_PTxFEmp);
+			s3c_hsotg_en_gsint(hsotg, GINTSTS_PTxFEmp);
 			return -ENOSPC;
 		}
 	} else if (hsotg->dedicated_fifos && hs_ep->index != 0) {
-		can_write = readl(hsotg->regs + S3C_DTXFSTS(hs_ep->index));
+		can_write = readl(hsotg->regs + DTXFSTS(hs_ep->index));
 
 		can_write &= 0xffff;
 		can_write *= 4;
 	} else {
-		if (S3C_GNPTXSTS_NPTxQSpcAvail_GET(gnptxsts) == 0) {
+		if (GNPTXSTS_NPTxQSpcAvail_GET(gnptxsts) == 0) {
 			dev_dbg(hsotg->dev,
 				"%s: no queue slots available (0x%08x)\n",
 				__func__, gnptxsts);
 
-			s3c_hsotg_en_gsint(hsotg, S3C_GINTSTS_NPTxFEmp);
+			s3c_hsotg_en_gsint(hsotg, GINTSTS_NPTxFEmp);
 			return -ENOSPC;
 		}
 
-		can_write = S3C_GNPTXSTS_NPTxFSpcAvail_GET(gnptxsts);
+		can_write = GNPTXSTS_NPTxFSpcAvail_GET(gnptxsts);
 		can_write *= 4;	/* fifo size is in 32bit quantities. */
 	}
 
 	dev_dbg(hsotg->dev, "%s: GNPTXSTS=%08x, can=%d, to=%d, mps %d\n",
 		 __func__, gnptxsts, can_write, to_write, hs_ep->ep.maxpacket);
 
-	/* limit to 512 bytes of data, it seems at least on the non-periodic
+	/*
+	 * limit to 512 bytes of data, it seems at least on the non-periodic
 	 * FIFO, requests of >512 cause the endpoint to get stuck with a
 	 * fragment of the end of the transfer in it.
 	 */
 	if (can_write > 512)
 		can_write = 512;
 
-	/* limit the write to one max-packet size worth of data, but allow
+	/*
+	 * limit the write to one max-packet size worth of data, but allow
 	 * the transfer to return that it did not run out of fifo space
-	 * doing it. */
+	 * doing it.
+	 */
 	if (to_write > hs_ep->ep.maxpacket) {
 		to_write = hs_ep->ep.maxpacket;
 
 		s3c_hsotg_en_gsint(hsotg,
-				   periodic ? S3C_GINTSTS_PTxFEmp :
-				   S3C_GINTSTS_NPTxFEmp);
+				   periodic ? GINTSTS_PTxFEmp :
+				   GINTSTS_NPTxFEmp);
 	}
 
 	/* see if we can write data */
@@ -559,8 +576,8 @@ static int s3c_hsotg_write_fifo(struct s3c_hsotg *hsotg,
 		to_write = can_write;
 		pkt_round = to_write % hs_ep->ep.maxpacket;
 
-		/* Not sure, but we probably shouldn't be writing partial
-		 * packets into the FIFO, so round the write down to an
+		/*
+		 * Round the write down to an
 		 * exact number of packets.
 		 *
 		 * Note, we do not currently check to see if we can ever
@@ -570,12 +587,14 @@ static int s3c_hsotg_write_fifo(struct s3c_hsotg *hsotg,
 		if (pkt_round)
 			to_write -= pkt_round;
 
-		/* enable correct FIFO interrupt to alert us when there
-		 * is more room left. */
+		/*
+		 * enable correct FIFO interrupt to alert us when there
+		 * is more room left.
+		 */
 
 		s3c_hsotg_en_gsint(hsotg,
-				   periodic ? S3C_GINTSTS_PTxFEmp :
-				   S3C_GINTSTS_NPTxFEmp);
+				   periodic ? GINTSTS_PTxFEmp :
+				   GINTSTS_NPTxFEmp);
 	}
 
 	dev_dbg(hsotg->dev, "write %d/%d, can_write %d, done %d\n",
@@ -593,7 +612,7 @@ static int s3c_hsotg_write_fifo(struct s3c_hsotg *hsotg,
 	to_write = DIV_ROUND_UP(to_write, 4);
 	data = hs_req->req.buf + buf_pos;
 
-	writesl(hsotg->regs + S3C_EPFIFO(hs_ep->index), data, to_write);
+	writesl(hsotg->regs + EPFIFO(hs_ep->index), data, to_write);
 
 	return (to_write >= can_write) ? -ENOSPC : 0;
 }
@@ -612,12 +631,12 @@ static unsigned get_ep_limit(struct s3c_hsotg_ep *hs_ep)
 	unsigned maxpkt;
 
 	if (index != 0) {
-		maxsize = S3C_DxEPTSIZ_XferSize_LIMIT + 1;
-		maxpkt = S3C_DxEPTSIZ_PktCnt_LIMIT + 1;
+		maxsize = DxEPTSIZ_XferSize_LIMIT + 1;
+		maxpkt = DxEPTSIZ_PktCnt_LIMIT + 1;
 	} else {
 		maxsize = 64+64;
 		if (hs_ep->dir_in)
-			maxpkt = S3C_DIEPTSIZ0_PktCnt_LIMIT + 1;
+			maxpkt = DIEPTSIZ0_PktCnt_LIMIT + 1;
 		else
 			maxpkt = 2;
 	}
@@ -626,8 +645,10 @@ static unsigned get_ep_limit(struct s3c_hsotg_ep *hs_ep)
 	maxpkt--;
 	maxsize--;
 
-	/* constrain by packet count if maxpkts*pktsize is greater
-	 * than the length register size. */
+	/*
+	 * constrain by packet count if maxpkts*pktsize is greater
+	 * than the length register size.
+	 */
 
 	if ((maxpkt * hs_ep->ep.maxpacket) < maxsize)
 		maxsize = maxpkt * hs_ep->ep.maxpacket;
@@ -674,8 +695,8 @@ static void s3c_hsotg_start_req(struct s3c_hsotg *hsotg,
 		}
 	}
 
-	epctrl_reg = dir_in ? S3C_DIEPCTL(index) : S3C_DOEPCTL(index);
-	epsize_reg = dir_in ? S3C_DIEPTSIZ(index) : S3C_DOEPTSIZ(index);
+	epctrl_reg = dir_in ? DIEPCTL(index) : DOEPCTL(index);
+	epsize_reg = dir_in ? DIEPTSIZ(index) : DOEPTSIZ(index);
 
 	dev_dbg(hsotg->dev, "%s: DxEPCTL=0x%08x, ep %d, dir %s\n",
 		__func__, readl(hsotg->regs + epctrl_reg), index,
@@ -684,13 +705,14 @@ static void s3c_hsotg_start_req(struct s3c_hsotg *hsotg,
 	/* If endpoint is stalled, we will restart request later */
 	ctrl = readl(hsotg->regs + epctrl_reg);
 
-	if (ctrl & S3C_DxEPCTL_Stall) {
+	if (ctrl & DxEPCTL_Stall) {
 		dev_warn(hsotg->dev, "%s: ep%d is stalled\n", __func__, index);
 		return;
 	}
 
 	length = ureq->length - ureq->actual;
-
+	dev_dbg(hsotg->dev, "ureq->length:%d ureq->actual:%d\n",
+		ureq->length, ureq->actual);
 	if (0)
 		dev_dbg(hsotg->dev,
 			"REQ buf %p len %d dma 0x%08x noi=%d zp=%d snok=%d\n",
@@ -717,20 +739,22 @@ static void s3c_hsotg_start_req(struct s3c_hsotg *hsotg,
 		packets = 1;	/* send one packet if length is zero. */
 
 	if (dir_in && index != 0)
-		epsize = S3C_DxEPTSIZ_MC(1);
+		epsize = DxEPTSIZ_MC(1);
 	else
 		epsize = 0;
 
 	if (index != 0 && ureq->zero) {
-		/* test for the packets being exactly right for the
-		 * transfer */
+		/*
+		 * test for the packets being exactly right for the
+		 * transfer
+		 */
 
 		if (length == (packets * hs_ep->ep.maxpacket))
 			packets++;
 	}
 
-	epsize |= S3C_DxEPTSIZ_PktCnt(packets);
-	epsize |= S3C_DxEPTSIZ_XferSize(length);
+	epsize |= DxEPTSIZ_PktCnt(packets);
+	epsize |= DxEPTSIZ_XferSize(length);
 
 	dev_dbg(hsotg->dev, "%s: %d@%d/%d, 0x%08x => 0x%08x\n",
 		__func__, packets, length, ureq->length, epsize, epsize_reg);
@@ -744,26 +768,38 @@ static void s3c_hsotg_start_req(struct s3c_hsotg *hsotg,
 	if (using_dma(hsotg) && !continuing) {
 		unsigned int dma_reg;
 
-		/* write DMA address to control register, buffer already
-		 * synced by s3c_hsotg_ep_queue().  */
+		/*
+		 * write DMA address to control register, buffer already
+		 * synced by s3c_hsotg_ep_queue().
+		 */
 
-		dma_reg = dir_in ? S3C_DIEPDMA(index) : S3C_DOEPDMA(index);
+		dma_reg = dir_in ? DIEPDMA(index) : DOEPDMA(index);
 		writel(ureq->dma, hsotg->regs + dma_reg);
 
 		dev_dbg(hsotg->dev, "%s: 0x%08x => 0x%08x\n",
 			__func__, ureq->dma, dma_reg);
 	}
 
-	ctrl |= S3C_DxEPCTL_EPEna;	/* ensure ep enabled */
-	ctrl |= S3C_DxEPCTL_USBActEp;
-	ctrl |= S3C_DxEPCTL_CNAK;	/* clear NAK set by core */
+	ctrl |= DxEPCTL_EPEna;	/* ensure ep enabled */
+	ctrl |= DxEPCTL_USBActEp;
+
+	dev_dbg(hsotg->dev, "setup req:%d\n", hsotg->setup);
+
+	/* For Setup request do not clear NAK */
+	if (hsotg->setup && index == 0)
+		hsotg->setup = 0;
+	else
+		ctrl |= DxEPCTL_CNAK;	/* clear NAK set by core */
+
 
 	dev_dbg(hsotg->dev, "%s: DxEPCTL=0x%08x\n", __func__, ctrl);
 	writel(ctrl, hsotg->regs + epctrl_reg);
 
-	/* set these, it seems that DMA support increments past the end
+	/*
+	 * set these, it seems that DMA support increments past the end
 	 * of the packet buffer so we need to calculate the length from
-	 * this information. */
+	 * this information.
+	 */
 	hs_ep->size_loaded = length;
 	hs_ep->last_load = ureq->actual;
 
@@ -774,17 +810,21 @@ static void s3c_hsotg_start_req(struct s3c_hsotg *hsotg,
 		s3c_hsotg_write_fifo(hsotg, hs_ep, hs_req);
 	}
 
-	/* clear the INTknTXFEmpMsk when we start request, more as a aide
-	 * to debugging to see what is going on. */
+	/*
+	 * clear the INTknTXFEmpMsk when we start request, more as a aide
+	 * to debugging to see what is going on.
+	 */
 	if (dir_in)
-		writel(S3C_DIEPMSK_INTknTXFEmpMsk,
-		       hsotg->regs + S3C_DIEPINT(index));
+		writel(DIEPMSK_INTknTXFEmpMsk,
+		       hsotg->regs + DIEPINT(index));
 
-	/* Note, trying to clear the NAK here causes problems with transmit
-	 * on the S3C6400 ending up with the TXFIFO becoming full. */
+	/*
+	 * Note, trying to clear the NAK here causes problems with transmit
+	 * on the S3C6400 ending up with the TXFIFO becoming full.
+	 */
 
 	/* check ep is enabled */
-	if (!(readl(hsotg->regs + epctrl_reg) & S3C_DxEPCTL_EPEna))
+	if (!(readl(hsotg->regs + epctrl_reg) & DxEPCTL_EPEna))
 		dev_warn(hsotg->dev,
 			 "ep%d: failed to become enabled (DxEPCTL=0x%08x)?\n",
 			 index, readl(hsotg->regs + epctrl_reg));
@@ -804,7 +844,7 @@ static void s3c_hsotg_start_req(struct s3c_hsotg *hsotg,
  * then ensure the buffer has been synced to memory. If our buffer has no
  * DMA memory, then we map the memory and mark our request to allow us to
  * cleanup on completion.
-*/
+ */
 static int s3c_hsotg_map_dma(struct s3c_hsotg *hsotg,
 			     struct s3c_hsotg_ep *hs_ep,
 			     struct usb_request *req)
@@ -922,7 +962,7 @@ static void s3c_hsotg_complete_oursetup(struct usb_ep *ep,
  *
  * Convert the given wIndex into a pointer to an driver endpoint
  * structure, or return NULL if it is not a valid endpoint.
-*/
+ */
 static struct s3c_hsotg_ep *ep_from_windex(struct s3c_hsotg *hsotg,
 					   u32 windex)
 {
@@ -933,7 +973,7 @@ static struct s3c_hsotg_ep *ep_from_windex(struct s3c_hsotg *hsotg,
 	if (windex >= 0x100)
 		return NULL;
 
-	if (idx > S3C_HSOTG_EPS)
+	if (idx > hsotg->num_of_eps)
 		return NULL;
 
 	if (idx && ep->dir_in != dir)
@@ -1151,24 +1191,28 @@ static void s3c_hsotg_process_control(struct s3c_hsotg *hsotg,
 		 ctrl->bRequest, ctrl->bRequestType,
 		 ctrl->wValue, ctrl->wLength);
 
-	/* record the direction of the request, for later use when enquing
-	 * packets onto EP0. */
+	/*
+	 * record the direction of the request, for later use when enquing
+	 * packets onto EP0.
+	 */
 
 	ep0->dir_in = (ctrl->bRequestType & USB_DIR_IN) ? 1 : 0;
 	dev_dbg(hsotg->dev, "ctrl: dir_in=%d\n", ep0->dir_in);
 
-	/* if we've no data with this request, then the last part of the
-	 * transaction is going to implicitly be IN. */
+	/*
+	 * if we've no data with this request, then the last part of the
+	 * transaction is going to implicitly be IN.
+	 */
 	if (ctrl->wLength == 0)
 		ep0->dir_in = 1;
 
 	if ((ctrl->bRequestType & USB_TYPE_MASK) == USB_TYPE_STANDARD) {
 		switch (ctrl->bRequest) {
 		case USB_REQ_SET_ADDRESS:
-			dcfg = readl(hsotg->regs + S3C_DCFG);
-			dcfg &= ~S3C_DCFG_DevAddr_MASK;
-			dcfg |= ctrl->wValue << S3C_DCFG_DevAddr_SHIFT;
-			writel(dcfg, hsotg->regs + S3C_DCFG);
+			dcfg = readl(hsotg->regs + DCFG);
+			dcfg &= ~DCFG_DevAddr_MASK;
+			dcfg |= ctrl->wValue << DCFG_DevAddr_SHIFT;
+			writel(dcfg, hsotg->regs + DCFG);
 
 			dev_info(hsotg->dev, "new address %d\n", ctrl->wValue);
 
@@ -1194,7 +1238,8 @@ static void s3c_hsotg_process_control(struct s3c_hsotg *hsotg,
 			dev_dbg(hsotg->dev, "driver->setup() ret %d\n", ret);
 	}
 
-	/* the request is either unhandlable, or is not formatted correctly
+	/*
+	 * the request is either unhandlable, or is not formatted correctly
 	 * so respond with a STALL for the status stage to indicate failure.
 	 */
 
@@ -1203,22 +1248,26 @@ static void s3c_hsotg_process_control(struct s3c_hsotg *hsotg,
 		u32 ctrl;
 
 		dev_dbg(hsotg->dev, "ep0 stall (dir=%d)\n", ep0->dir_in);
-		reg = (ep0->dir_in) ? S3C_DIEPCTL0 : S3C_DOEPCTL0;
+		reg = (ep0->dir_in) ? DIEPCTL0 : DOEPCTL0;
 
-		/* S3C_DxEPCTL_Stall will be cleared by EP once it has
-		 * taken effect, so no need to clear later. */
+		/*
+		 * DxEPCTL_Stall will be cleared by EP once it has
+		 * taken effect, so no need to clear later.
+		 */
 
 		ctrl = readl(hsotg->regs + reg);
-		ctrl |= S3C_DxEPCTL_Stall;
-		ctrl |= S3C_DxEPCTL_CNAK;
+		ctrl |= DxEPCTL_Stall;
+		ctrl |= DxEPCTL_CNAK;
 		writel(ctrl, hsotg->regs + reg);
 
 		dev_dbg(hsotg->dev,
 			"written DxEPCTL=0x%08x to %08x (DxEPCTL=0x%08x)\n",
 			ctrl, reg, readl(hsotg->regs + reg));
 
-		/* don't believe we need to anything more to get the EP
-		 * to reply with a STALL packet */
+		/*
+		 * don't believe we need to anything more to get the EP
+		 * to reply with a STALL packet
+		 */
 	}
 }
 
@@ -1279,8 +1328,10 @@ static void s3c_hsotg_enqueue_setup(struct s3c_hsotg *hsotg)
 	ret = s3c_hsotg_ep_queue(&hsotg->eps[0].ep, req, GFP_ATOMIC);
 	if (ret < 0) {
 		dev_err(hsotg->dev, "%s: failed queue (%d)\n", __func__, ret);
-		/* Don't think there's much we can do other than watch the
-		 * driver fail. */
+		/*
+		 * Don't think there's much we can do other than watch the
+		 * driver fail.
+		 */
 	}
 }
 
@@ -1296,7 +1347,7 @@ static void s3c_hsotg_enqueue_setup(struct s3c_hsotg *hsotg)
  * on the endpoint.
  *
  * Note, expects the ep to already be locked as appropriate.
-*/
+ */
 static void s3c_hsotg_complete_request(struct s3c_hsotg *hsotg,
 				       struct s3c_hsotg_ep *hs_ep,
 				       struct s3c_hsotg_req *hs_req,
@@ -1312,8 +1363,10 @@ static void s3c_hsotg_complete_request(struct s3c_hsotg *hsotg,
 	dev_dbg(hsotg->dev, "complete: ep %p %s, req %p, %d => %p\n",
 		hs_ep, hs_ep->ep.name, hs_req, result, hs_req->req.complete);
 
-	/* only replace the status if we've not already set an error
-	 * from a previous transaction */
+	/*
+	 * only replace the status if we've not already set an error
+	 * from a previous transaction
+	 */
 
 	if (hs_req->req.status == -EINPROGRESS)
 		hs_req->req.status = result;
@@ -1324,8 +1377,10 @@ static void s3c_hsotg_complete_request(struct s3c_hsotg *hsotg,
 	if (using_dma(hsotg))
 		s3c_hsotg_unmap_dma(hsotg, hs_ep, hs_req);
 
-	/* call the complete request with the locks off, just in case the
-	 * request tries to queue more work for this endpoint. */
+	/*
+	 * call the complete request with the locks off, just in case the
+	 * request tries to queue more work for this endpoint.
+	 */
 
 	if (hs_req->req.complete) {
 		spin_unlock(&hs_ep->lock);
@@ -1333,9 +1388,11 @@ static void s3c_hsotg_complete_request(struct s3c_hsotg *hsotg,
 		spin_lock(&hs_ep->lock);
 	}
 
-	/* Look to see if there is anything else to do. Note, the completion
+	/*
+	 * Look to see if there is anything else to do. Note, the completion
 	 * of the previous request may have caused a new request to be started
-	 * so be careful when doing this. */
+	 * so be careful when doing this.
+	 */
 
 	if (!hs_ep->req && result >= 0) {
 		restart = !list_empty(&hs_ep->queue);
@@ -1355,7 +1412,7 @@ static void s3c_hsotg_complete_request(struct s3c_hsotg *hsotg,
  *
  * See s3c_hsotg_complete_request(), but called with the endpoint's
  * lock held.
-*/
+ */
 static void s3c_hsotg_complete_request_lock(struct s3c_hsotg *hsotg,
 					    struct s3c_hsotg_ep *hs_ep,
 					    struct s3c_hsotg_req *hs_req,
@@ -1382,13 +1439,13 @@ static void s3c_hsotg_rx_data(struct s3c_hsotg *hsotg, int ep_idx, int size)
 {
 	struct s3c_hsotg_ep *hs_ep = &hsotg->eps[ep_idx];
 	struct s3c_hsotg_req *hs_req = hs_ep->req;
-	void __iomem *fifo = hsotg->regs + S3C_EPFIFO(ep_idx);
+	void __iomem *fifo = hsotg->regs + EPFIFO(ep_idx);
 	int to_read;
 	int max_req;
 	int read_ptr;
 
 	if (!hs_req) {
-		u32 epctl = readl(hsotg->regs + S3C_DOEPCTL(ep_idx));
+		u32 epctl = readl(hsotg->regs + DOEPCTL(ep_idx));
 		int ptr;
 
 		dev_warn(hsotg->dev,
@@ -1412,7 +1469,8 @@ static void s3c_hsotg_rx_data(struct s3c_hsotg *hsotg, int ep_idx, int size)
 		__func__, to_read, max_req, read_ptr, hs_req->req.length);
 
 	if (to_read > max_req) {
-		/* more data appeared than we where willing
+		/*
+		 * more data appeared than we where willing
 		 * to deal with in this request.
 		 */
 
@@ -1424,8 +1482,10 @@ static void s3c_hsotg_rx_data(struct s3c_hsotg *hsotg, int ep_idx, int size)
 	hs_req->req.actual += to_read;
 	to_read = DIV_ROUND_UP(to_read, 4);
 
-	/* note, we might over-write the buffer end by 3 bytes depending on
-	 * alignment of the data. */
+	/*
+	 * note, we might over-write the buffer end by 3 bytes depending on
+	 * alignment of the data.
+	 */
 	readsl(fifo, hs_req->req.buf + read_ptr, to_read);
 
 	spin_unlock(&hs_ep->lock);
@@ -1465,14 +1525,14 @@ static void s3c_hsotg_send_zlp(struct s3c_hsotg *hsotg,
 	dev_dbg(hsotg->dev, "sending zero-length packet\n");
 
 	/* issue a zero-sized packet to terminate this */
-	writel(S3C_DxEPTSIZ_MC(1) | S3C_DxEPTSIZ_PktCnt(1) |
-	       S3C_DxEPTSIZ_XferSize(0), hsotg->regs + S3C_DIEPTSIZ(0));
+	writel(DxEPTSIZ_MC(1) | DxEPTSIZ_PktCnt(1) |
+	       DxEPTSIZ_XferSize(0), hsotg->regs + DIEPTSIZ(0));
 
-	ctrl = readl(hsotg->regs + S3C_DIEPCTL0);
-	ctrl |= S3C_DxEPCTL_CNAK;  /* clear NAK set by core */
-	ctrl |= S3C_DxEPCTL_EPEna; /* ensure ep enabled */
-	ctrl |= S3C_DxEPCTL_USBActEp;
-	writel(ctrl, hsotg->regs + S3C_DIEPCTL0);
+	ctrl = readl(hsotg->regs + DIEPCTL0);
+	ctrl |= DxEPCTL_CNAK;  /* clear NAK set by core */
+	ctrl |= DxEPCTL_EPEna; /* ensure ep enabled */
+	ctrl |= DxEPCTL_USBActEp;
+	writel(ctrl, hsotg->regs + DIEPCTL0);
 }
 
 /**
@@ -1484,15 +1544,15 @@ static void s3c_hsotg_send_zlp(struct s3c_hsotg *hsotg,
  * The RXFIFO has delivered an OutDone event, which means that the data
  * transfer for an OUT endpoint has been completed, either by a short
  * packet or by the finish of a transfer.
-*/
+ */
 static void s3c_hsotg_handle_outdone(struct s3c_hsotg *hsotg,
 				     int epnum, bool was_setup)
 {
-	u32 epsize = readl(hsotg->regs + S3C_DOEPTSIZ(epnum));
+	u32 epsize = readl(hsotg->regs + DOEPTSIZ(epnum));
 	struct s3c_hsotg_ep *hs_ep = &hsotg->eps[epnum];
 	struct s3c_hsotg_req *hs_req = hs_ep->req;
 	struct usb_request *req = &hs_req->req;
-	unsigned size_left = S3C_DxEPTSIZ_XferSize_GET(epsize);
+	unsigned size_left = DxEPTSIZ_XferSize_GET(epsize);
 	int result = 0;
 
 	if (!hs_req) {
@@ -1503,7 +1563,8 @@ static void s3c_hsotg_handle_outdone(struct s3c_hsotg *hsotg,
 	if (using_dma(hsotg)) {
 		unsigned size_done;
 
-		/* Calculate the size of the transfer by checking how much
+		/*
+		 * Calculate the size of the transfer by checking how much
 		 * is left in the endpoint size register and then working it
 		 * out from the amount we loaded for the transfer.
 		 *
@@ -1521,17 +1582,29 @@ static void s3c_hsotg_handle_outdone(struct s3c_hsotg *hsotg,
 	if (req->actual < req->length && size_left == 0) {
 		s3c_hsotg_start_req(hsotg, hs_ep, hs_req, true);
 		return;
+	} else if (epnum == 0) {
+		/*
+		 * After was_setup = 1 =>
+		 * set CNAK for non Setup requests
+		 */
+		hsotg->setup = was_setup ? 0 : 1;
 	}
 
 	if (req->actual < req->length && req->short_not_ok) {
 		dev_dbg(hsotg->dev, "%s: got %d/%d (short not ok) => error\n",
 			__func__, req->actual, req->length);
 
-		/* todo - what should we return here? there's no one else
-		 * even bothering to check the status. */
+		/*
+		 * todo - what should we return here? there's no one else
+		 * even bothering to check the status.
+		 */
 	}
 
 	if (epnum == 0) {
+		/*
+		 * Condition req->complete != s3c_hsotg_complete_setup says:
+		 * send ZLP when we have an asynchronous request from gadget
+		 */
 		if (!was_setup && req->complete != s3c_hsotg_complete_setup)
 			s3c_hsotg_send_zlp(hsotg, hs_req);
 	}
@@ -1544,14 +1617,14 @@ static void s3c_hsotg_handle_outdone(struct s3c_hsotg *hsotg,
  * @hsotg: The device instance
  *
  * Return the current frame number
-*/
+ */
 static u32 s3c_hsotg_read_frameno(struct s3c_hsotg *hsotg)
 {
 	u32 dsts;
 
-	dsts = readl(hsotg->regs + S3C_DSTS);
-	dsts &= S3C_DSTS_SOFFN_MASK;
-	dsts >>= S3C_DSTS_SOFFN_SHIFT;
+	dsts = readl(hsotg->regs + DSTS);
+	dsts &= DSTS_SOFFN_MASK;
+	dsts >>= DSTS_SOFFN_SHIFT;
 
 	return dsts;
 }
@@ -1574,29 +1647,29 @@ static u32 s3c_hsotg_read_frameno(struct s3c_hsotg *hsotg)
  */
 static void s3c_hsotg_handle_rx(struct s3c_hsotg *hsotg)
 {
-	u32 grxstsr = readl(hsotg->regs + S3C_GRXSTSP);
+	u32 grxstsr = readl(hsotg->regs + GRXSTSP);
 	u32 epnum, status, size;
 
 	WARN_ON(using_dma(hsotg));
 
-	epnum = grxstsr & S3C_GRXSTS_EPNum_MASK;
-	status = grxstsr & S3C_GRXSTS_PktSts_MASK;
+	epnum = grxstsr & GRXSTS_EPNum_MASK;
+	status = grxstsr & GRXSTS_PktSts_MASK;
 
-	size = grxstsr & S3C_GRXSTS_ByteCnt_MASK;
-	size >>= S3C_GRXSTS_ByteCnt_SHIFT;
+	size = grxstsr & GRXSTS_ByteCnt_MASK;
+	size >>= GRXSTS_ByteCnt_SHIFT;
 
 	if (1)
 		dev_dbg(hsotg->dev, "%s: GRXSTSP=0x%08x (%d@%d)\n",
 			__func__, grxstsr, size, epnum);
 
-#define __status(x) ((x) >> S3C_GRXSTS_PktSts_SHIFT)
+#define __status(x) ((x) >> GRXSTS_PktSts_SHIFT)
 
-	switch (status >> S3C_GRXSTS_PktSts_SHIFT) {
-	case __status(S3C_GRXSTS_PktSts_GlobalOutNAK):
+	switch (status >> GRXSTS_PktSts_SHIFT) {
+	case __status(GRXSTS_PktSts_GlobalOutNAK):
 		dev_dbg(hsotg->dev, "GlobalOutNAK\n");
 		break;
 
-	case __status(S3C_GRXSTS_PktSts_OutDone):
+	case __status(GRXSTS_PktSts_OutDone):
 		dev_dbg(hsotg->dev, "OutDone (Frame=0x%08x)\n",
 			s3c_hsotg_read_frameno(hsotg));
 
@@ -1604,24 +1677,24 @@ static void s3c_hsotg_handle_rx(struct s3c_hsotg *hsotg)
 			s3c_hsotg_handle_outdone(hsotg, epnum, false);
 		break;
 
-	case __status(S3C_GRXSTS_PktSts_SetupDone):
+	case __status(GRXSTS_PktSts_SetupDone):
 		dev_dbg(hsotg->dev,
 			"SetupDone (Frame=0x%08x, DOPEPCTL=0x%08x)\n",
 			s3c_hsotg_read_frameno(hsotg),
-			readl(hsotg->regs + S3C_DOEPCTL(0)));
+			readl(hsotg->regs + DOEPCTL(0)));
 
 		s3c_hsotg_handle_outdone(hsotg, epnum, true);
 		break;
 
-	case __status(S3C_GRXSTS_PktSts_OutRX):
+	case __status(GRXSTS_PktSts_OutRX):
 		s3c_hsotg_rx_data(hsotg, epnum, size);
 		break;
 
-	case __status(S3C_GRXSTS_PktSts_SetupRX):
+	case __status(GRXSTS_PktSts_SetupRX):
 		dev_dbg(hsotg->dev,
 			"SetupRX (Frame=0x%08x, DOPEPCTL=0x%08x)\n",
 			s3c_hsotg_read_frameno(hsotg),
-			readl(hsotg->regs + S3C_DOEPCTL(0)));
+			readl(hsotg->regs + DOEPCTL(0)));
 
 		s3c_hsotg_rx_data(hsotg, epnum, size);
 		break;
@@ -1638,18 +1711,18 @@ static void s3c_hsotg_handle_rx(struct s3c_hsotg *hsotg)
 /**
  * s3c_hsotg_ep0_mps - turn max packet size into register setting
  * @mps: The maximum packet size in bytes.
-*/
+ */
 static u32 s3c_hsotg_ep0_mps(unsigned int mps)
 {
 	switch (mps) {
 	case 64:
-		return S3C_D0EPCTL_MPS_64;
+		return D0EPCTL_MPS_64;
 	case 32:
-		return S3C_D0EPCTL_MPS_32;
+		return D0EPCTL_MPS_32;
 	case 16:
-		return S3C_D0EPCTL_MPS_16;
+		return D0EPCTL_MPS_16;
 	case 8:
-		return S3C_D0EPCTL_MPS_8;
+		return D0EPCTL_MPS_8;
 	}
 
 	/* bad max packet size, warn and return invalid result */
@@ -1680,7 +1753,7 @@ static void s3c_hsotg_set_ep_maxpacket(struct s3c_hsotg *hsotg,
 		if (mpsval > 3)
 			goto bad_mps;
 	} else {
-		if (mps >= S3C_DxEPCTL_MPS_LIMIT+1)
+		if (mps >= DxEPCTL_MPS_LIMIT+1)
 			goto bad_mps;
 
 		mpsval = mps;
@@ -1688,19 +1761,21 @@ static void s3c_hsotg_set_ep_maxpacket(struct s3c_hsotg *hsotg,
 
 	hs_ep->ep.maxpacket = mps;
 
-	/* update both the in and out endpoint controldir_ registers, even
-	 * if one of the directions may not be in use. */
+	/*
+	 * update both the in and out endpoint controldir_ registers, even
+	 * if one of the directions may not be in use.
+	 */
 
-	reg = readl(regs + S3C_DIEPCTL(ep));
-	reg &= ~S3C_DxEPCTL_MPS_MASK;
+	reg = readl(regs + DIEPCTL(ep));
+	reg &= ~DxEPCTL_MPS_MASK;
 	reg |= mpsval;
-	writel(reg, regs + S3C_DIEPCTL(ep));
+	writel(reg, regs + DIEPCTL(ep));
 
 	if (ep) {
-		reg = readl(regs + S3C_DOEPCTL(ep));
-		reg &= ~S3C_DxEPCTL_MPS_MASK;
+		reg = readl(regs + DOEPCTL(ep));
+		reg &= ~DxEPCTL_MPS_MASK;
 		reg |= mpsval;
-		writel(reg, regs + S3C_DOEPCTL(ep));
+		writel(reg, regs + DOEPCTL(ep));
 	}
 
 	return;
@@ -1719,16 +1794,16 @@ static void s3c_hsotg_txfifo_flush(struct s3c_hsotg *hsotg, unsigned int idx)
 	int timeout;
 	int val;
 
-	writel(S3C_GRSTCTL_TxFNum(idx) | S3C_GRSTCTL_TxFFlsh,
-		hsotg->regs + S3C_GRSTCTL);
+	writel(GRSTCTL_TxFNum(idx) | GRSTCTL_TxFFlsh,
+		hsotg->regs + GRSTCTL);
 
 	/* wait until the fifo is flushed */
 	timeout = 100;
 
 	while (1) {
-		val = readl(hsotg->regs + S3C_GRSTCTL);
+		val = readl(hsotg->regs + GRSTCTL);
 
-		if ((val & (S3C_GRSTCTL_TxFFlsh)) == 0)
+		if ((val & (GRSTCTL_TxFFlsh)) == 0)
 			break;
 
 		if (--timeout == 0) {
@@ -1778,7 +1853,7 @@ static void s3c_hsotg_complete_in(struct s3c_hsotg *hsotg,
 				  struct s3c_hsotg_ep *hs_ep)
 {
 	struct s3c_hsotg_req *hs_req = hs_ep->req;
-	u32 epsize = readl(hsotg->regs + S3C_DIEPTSIZ(hs_ep->index));
+	u32 epsize = readl(hsotg->regs + DIEPTSIZ(hs_ep->index));
 	int size_left, size_done;
 
 	if (!hs_req) {
@@ -1786,7 +1861,15 @@ static void s3c_hsotg_complete_in(struct s3c_hsotg *hsotg,
 		return;
 	}
 
-	/* Calculate the size of the transfer by checking how much is left
+	/* Finish ZLP handling for IN EP0 transactions */
+	if (hsotg->eps[0].sent_zlp) {
+		dev_dbg(hsotg->dev, "zlp packet received\n");
+		s3c_hsotg_complete_request_lock(hsotg, hs_ep, hs_req, 0);
+		return;
+	}
+
+	/*
+	 * Calculate the size of the transfer by checking how much is left
 	 * in the endpoint size register and then working it out from
 	 * the amount we loaded for the transfer.
 	 *
@@ -1795,7 +1878,7 @@ static void s3c_hsotg_complete_in(struct s3c_hsotg *hsotg,
 	 * aligned).
 	 */
 
-	size_left = S3C_DxEPTSIZ_XferSize_GET(epsize);
+	size_left = DxEPTSIZ_XferSize_GET(epsize);
 
 	size_done = hs_ep->size_loaded - size_left;
 	size_done += hs_ep->last_load;
@@ -1805,9 +1888,28 @@ static void s3c_hsotg_complete_in(struct s3c_hsotg *hsotg,
 			__func__, hs_req->req.actual, size_done);
 
 	hs_req->req.actual = size_done;
+	dev_dbg(hsotg->dev, "req->length:%d req->actual:%d req->zero:%d\n",
+		hs_req->req.length, hs_req->req.actual, hs_req->req.zero);
+
+	/*
+	 * Check if dealing with Maximum Packet Size(MPS) IN transfer at EP0
+	 * When sent data is a multiple MPS size (e.g. 64B ,128B ,192B
+	 * ,256B ... ), after last MPS sized packet send IN ZLP packet to
+	 * inform the host that no more data is available.
+	 * The state of req.zero member is checked to be sure that the value to
+	 * send is smaller than wValue expected from host.
+	 * Check req.length to NOT send another ZLP when the current one is
+	 * under completion (the one for which this completion has been called).
+	 */
+	if (hs_req->req.length && hs_ep->index == 0 && hs_req->req.zero &&
+	    hs_req->req.length == hs_req->req.actual &&
+	    !(hs_req->req.length % hs_ep->ep.maxpacket)) {
 
-	/* if we did all of the transfer, and there is more data left
-	 * around, then try restarting the rest of the request */
+		dev_dbg(hsotg->dev, "ep0 zlp IN packet sent\n");
+		s3c_hsotg_send_zlp(hsotg, hs_req);
+
+		return;
+	}
 
 	if (!size_left && hs_req->req.actual < hs_req->req.length) {
 		dev_dbg(hsotg->dev, "%s trying more for req...\n", __func__);
@@ -1823,14 +1925,14 @@ static void s3c_hsotg_complete_in(struct s3c_hsotg *hsotg,
  * @dir_in: Set if this is an IN endpoint
  *
  * Process and clear any interrupt pending for an individual endpoint
-*/
+ */
 static void s3c_hsotg_epint(struct s3c_hsotg *hsotg, unsigned int idx,
 			    int dir_in)
 {
 	struct s3c_hsotg_ep *hs_ep = &hsotg->eps[idx];
-	u32 epint_reg = dir_in ? S3C_DIEPINT(idx) : S3C_DOEPINT(idx);
-	u32 epctl_reg = dir_in ? S3C_DIEPCTL(idx) : S3C_DOEPCTL(idx);
-	u32 epsiz_reg = dir_in ? S3C_DIEPTSIZ(idx) : S3C_DOEPTSIZ(idx);
+	u32 epint_reg = dir_in ? DIEPINT(idx) : DOEPINT(idx);
+	u32 epctl_reg = dir_in ? DIEPCTL(idx) : DOEPCTL(idx);
+	u32 epsiz_reg = dir_in ? DIEPTSIZ(idx) : DOEPTSIZ(idx);
 	u32 ints;
 
 	ints = readl(hsotg->regs + epint_reg);
@@ -1841,28 +1943,32 @@ static void s3c_hsotg_epint(struct s3c_hsotg *hsotg, unsigned int idx,
 	dev_dbg(hsotg->dev, "%s: ep%d(%s) DxEPINT=0x%08x\n",
 		__func__, idx, dir_in ? "in" : "out", ints);
 
-	if (ints & S3C_DxEPINT_XferCompl) {
+	if (ints & DxEPINT_XferCompl) {
 		dev_dbg(hsotg->dev,
 			"%s: XferCompl: DxEPCTL=0x%08x, DxEPTSIZ=%08x\n",
 			__func__, readl(hsotg->regs + epctl_reg),
 			readl(hsotg->regs + epsiz_reg));
 
-		/* we get OutDone from the FIFO, so we only need to look
-		 * at completing IN requests here */
+		/*
+		 * we get OutDone from the FIFO, so we only need to look
+		 * at completing IN requests here
+		 */
 		if (dir_in) {
 			s3c_hsotg_complete_in(hsotg, hs_ep);
 
 			if (idx == 0 && !hs_ep->req)
 				s3c_hsotg_enqueue_setup(hsotg);
 		} else if (using_dma(hsotg)) {
-			/* We're using DMA, we need to fire an OutDone here
-			 * as we ignore the RXFIFO. */
+			/*
+			 * We're using DMA, we need to fire an OutDone here
+			 * as we ignore the RXFIFO.
+			 */
 
 			s3c_hsotg_handle_outdone(hsotg, idx, false);
 		}
 	}
 
-	if (ints & S3C_DxEPINT_EPDisbld) {
+	if (ints & DxEPINT_EPDisbld) {
 		dev_dbg(hsotg->dev, "%s: EPDisbld\n", __func__);
 
 		if (dir_in) {
@@ -1870,27 +1976,29 @@ static void s3c_hsotg_epint(struct s3c_hsotg *hsotg, unsigned int idx,
 
 			s3c_hsotg_txfifo_flush(hsotg, idx);
 
-			if ((epctl & S3C_DxEPCTL_Stall) &&
-				(epctl & S3C_DxEPCTL_EPType_Bulk)) {
-				int dctl = readl(hsotg->regs + S3C_DCTL);
+			if ((epctl & DxEPCTL_Stall) &&
+				(epctl & DxEPCTL_EPType_Bulk)) {
+				int dctl = readl(hsotg->regs + DCTL);
 
-				dctl |= S3C_DCTL_CGNPInNAK;
-				writel(dctl, hsotg->regs + S3C_DCTL);
+				dctl |= DCTL_CGNPInNAK;
+				writel(dctl, hsotg->regs + DCTL);
 			}
 		}
 	}
 
-	if (ints & S3C_DxEPINT_AHBErr)
+	if (ints & DxEPINT_AHBErr)
 		dev_dbg(hsotg->dev, "%s: AHBErr\n", __func__);
 
-	if (ints & S3C_DxEPINT_Setup) {  /* Setup or Timeout */
+	if (ints & DxEPINT_Setup) {  /* Setup or Timeout */
 		dev_dbg(hsotg->dev, "%s: Setup/Timeout\n",  __func__);
 
 		if (using_dma(hsotg) && idx == 0) {
-			/* this is the notification we've received a
+			/*
+			 * this is the notification we've received a
 			 * setup packet. In non-DMA mode we'd get this
 			 * from the RXFIFO, instead we need to process
-			 * the setup here. */
+			 * the setup here.
+			 */
 
 			if (dir_in)
 				WARN_ON_ONCE(1);
@@ -1899,26 +2007,25 @@ static void s3c_hsotg_epint(struct s3c_hsotg *hsotg, unsigned int idx,
 		}
 	}
 
-	if (ints & S3C_DxEPINT_Back2BackSetup)
+	if (ints & DxEPINT_Back2BackSetup)
 		dev_dbg(hsotg->dev, "%s: B2BSetup/INEPNakEff\n", __func__);
 
 	if (dir_in) {
-		/* not sure if this is important, but we'll clear it anyway
-		 */
-		if (ints & S3C_DIEPMSK_INTknTXFEmpMsk) {
+		/* not sure if this is important, but we'll clear it anyway */
+		if (ints & DIEPMSK_INTknTXFEmpMsk) {
 			dev_dbg(hsotg->dev, "%s: ep%d: INTknTXFEmpMsk\n",
 				__func__, idx);
 		}
 
 		/* this probably means something bad is happening */
-		if (ints & S3C_DIEPMSK_INTknEPMisMsk) {
+		if (ints & DIEPMSK_INTknEPMisMsk) {
 			dev_warn(hsotg->dev, "%s: ep%d: INTknEP\n",
 				 __func__, idx);
 		}
 
 		/* FIFO has space or is empty (see GAHBCFG) */
 		if (hsotg->dedicated_fifos &&
-		    ints & S3C_DIEPMSK_TxFIFOEmpty) {
+		    ints & DIEPMSK_TxFIFOEmpty) {
 			dev_dbg(hsotg->dev, "%s: ep%d: TxFIFOEmpty\n",
 				__func__, idx);
 			if (!using_dma(hsotg))
@@ -1933,40 +2040,45 @@ static void s3c_hsotg_epint(struct s3c_hsotg *hsotg, unsigned int idx,
  *
  * Handle updating the device settings after the enumeration phase has
  * been completed.
-*/
+ */
 static void s3c_hsotg_irq_enumdone(struct s3c_hsotg *hsotg)
 {
-	u32 dsts = readl(hsotg->regs + S3C_DSTS);
+	u32 dsts = readl(hsotg->regs + DSTS);
 	int ep0_mps = 0, ep_mps;
 
-	/* This should signal the finish of the enumeration phase
+	/*
+	 * This should signal the finish of the enumeration phase
 	 * of the USB handshaking, so we should now know what rate
-	 * we connected at. */
+	 * we connected at.
+	 */
 
 	dev_dbg(hsotg->dev, "EnumDone (DSTS=0x%08x)\n", dsts);
 
-	/* note, since we're limited by the size of transfer on EP0, and
+	/*
+	 * note, since we're limited by the size of transfer on EP0, and
 	 * it seems IN transfers must be a even number of packets we do
-	 * not advertise a 64byte MPS on EP0. */
+	 * not advertise a 64byte MPS on EP0.
+	 */
 
 	/* catch both EnumSpd_FS and EnumSpd_FS48 */
-	switch (dsts & S3C_DSTS_EnumSpd_MASK) {
-	case S3C_DSTS_EnumSpd_FS:
-	case S3C_DSTS_EnumSpd_FS48:
+	switch (dsts & DSTS_EnumSpd_MASK) {
+	case DSTS_EnumSpd_FS:
+	case DSTS_EnumSpd_FS48:
 		hsotg->gadget.speed = USB_SPEED_FULL;
 		ep0_mps = EP0_MPS_LIMIT;
 		ep_mps = 64;
 		break;
 
-	case S3C_DSTS_EnumSpd_HS:
+	case DSTS_EnumSpd_HS:
 		hsotg->gadget.speed = USB_SPEED_HIGH;
 		ep0_mps = EP0_MPS_LIMIT;
 		ep_mps = 512;
 		break;
 
-	case S3C_DSTS_EnumSpd_LS:
+	case DSTS_EnumSpd_LS:
 		hsotg->gadget.speed = USB_SPEED_LOW;
-		/* note, we don't actually support LS in this driver at the
+		/*
+		 * note, we don't actually support LS in this driver at the
 		 * moment, and the documentation seems to imply that it isn't
 		 * supported by the PHYs on some of the devices.
 		 */
@@ -1975,13 +2087,15 @@ static void s3c_hsotg_irq_enumdone(struct s3c_hsotg *hsotg)
 	dev_info(hsotg->dev, "new device is %s\n",
 		 usb_speed_string(hsotg->gadget.speed));
 
-	/* we should now know the maximum packet size for an
-	 * endpoint, so set the endpoints to a default value. */
+	/*
+	 * we should now know the maximum packet size for an
+	 * endpoint, so set the endpoints to a default value.
+	 */
 
 	if (ep0_mps) {
 		int i;
 		s3c_hsotg_set_ep_maxpacket(hsotg, 0, ep0_mps);
-		for (i = 1; i < S3C_HSOTG_EPS; i++)
+		for (i = 1; i < hsotg->num_of_eps; i++)
 			s3c_hsotg_set_ep_maxpacket(hsotg, i, ep_mps);
 	}
 
@@ -1990,8 +2104,8 @@ static void s3c_hsotg_irq_enumdone(struct s3c_hsotg *hsotg)
 	s3c_hsotg_enqueue_setup(hsotg);
 
 	dev_dbg(hsotg->dev, "EP0: DIEPCTL0=0x%08x, DOEPCTL0=0x%08x\n",
-		readl(hsotg->regs + S3C_DIEPCTL0),
-		readl(hsotg->regs + S3C_DOEPCTL0));
+		readl(hsotg->regs + DIEPCTL0),
+		readl(hsotg->regs + DOEPCTL0));
 }
 
 /**
@@ -2014,8 +2128,10 @@ static void kill_all_requests(struct s3c_hsotg *hsotg,
 	spin_lock_irqsave(&ep->lock, flags);
 
 	list_for_each_entry_safe(req, treq, &ep->queue, queue) {
-		/* currently, we can't do much about an already
-		 * running request on an in endpoint */
+		/*
+		 * currently, we can't do much about an already
+		 * running request on an in endpoint
+		 */
 
 		if (ep->req == req && ep->dir_in && !force)
 			continue;
@@ -2033,18 +2149,18 @@ static void kill_all_requests(struct s3c_hsotg *hsotg,
 		(_hs)->driver->_entry(&(_hs)->gadget);
 
 /**
- * s3c_hsotg_disconnect_irq - disconnect irq service
+ * s3c_hsotg_disconnect - disconnect service
  * @hsotg: The device state.
  *
- * A disconnect IRQ has been received, meaning that the host has
- * lost contact with the bus. Remove all current transactions
- * and signal the gadget driver that this has happened.
-*/
-static void s3c_hsotg_disconnect_irq(struct s3c_hsotg *hsotg)
+ * The device has been disconnected. Remove all current
+ * transactions and signal the gadget driver that this
+ * has happened.
+ */
+static void s3c_hsotg_disconnect(struct s3c_hsotg *hsotg)
 {
 	unsigned ep;
 
-	for (ep = 0; ep < S3C_HSOTG_EPS; ep++)
+	for (ep = 0; ep < hsotg->num_of_eps; ep++)
 		kill_all_requests(hsotg, &hsotg->eps[ep], -ESHUTDOWN, true);
 
 	call_gadget(hsotg, disconnect);
@@ -2062,7 +2178,7 @@ static void s3c_hsotg_irq_fifoempty(struct s3c_hsotg *hsotg, bool periodic)
 
 	/* look through for any more data to transmit */
 
-	for (epno = 0; epno < S3C_HSOTG_EPS; epno++) {
+	for (epno = 0; epno < hsotg->num_of_eps; epno++) {
 		ep = &hsotg->eps[epno];
 
 		if (!ep->dir_in)
@@ -2078,12 +2194,187 @@ static void s3c_hsotg_irq_fifoempty(struct s3c_hsotg *hsotg, bool periodic)
 	}
 }
 
-static struct s3c_hsotg *our_hsotg;
-
 /* IRQ flags which will trigger a retry around the IRQ loop */
-#define IRQ_RETRY_MASK (S3C_GINTSTS_NPTxFEmp | \
-			S3C_GINTSTS_PTxFEmp |  \
-			S3C_GINTSTS_RxFLvl)
+#define IRQ_RETRY_MASK (GINTSTS_NPTxFEmp | \
+			GINTSTS_PTxFEmp |  \
+			GINTSTS_RxFLvl)
+
+/**
+ * s3c_hsotg_corereset - issue softreset to the core
+ * @hsotg: The device state
+ *
+ * Issue a soft reset to the core, and await the core finishing it.
+ */
+static int s3c_hsotg_corereset(struct s3c_hsotg *hsotg)
+{
+	int timeout;
+	u32 grstctl;
+
+	dev_dbg(hsotg->dev, "resetting core\n");
+
+	/* issue soft reset */
+	writel(GRSTCTL_CSftRst, hsotg->regs + GRSTCTL);
+
+	timeout = 1000;
+	do {
+		grstctl = readl(hsotg->regs + GRSTCTL);
+	} while ((grstctl & GRSTCTL_CSftRst) && timeout-- > 0);
+
+	if (grstctl & GRSTCTL_CSftRst) {
+		dev_err(hsotg->dev, "Failed to get CSftRst asserted\n");
+		return -EINVAL;
+	}
+
+	timeout = 1000;
+
+	while (1) {
+		u32 grstctl = readl(hsotg->regs + GRSTCTL);
+
+		if (timeout-- < 0) {
+			dev_info(hsotg->dev,
+				 "%s: reset failed, GRSTCTL=%08x\n",
+				 __func__, grstctl);
+			return -ETIMEDOUT;
+		}
+
+		if (!(grstctl & GRSTCTL_AHBIdle))
+			continue;
+
+		break;		/* reset done */
+	}
+
+	dev_dbg(hsotg->dev, "reset successful\n");
+	return 0;
+}
+
+/**
+ * s3c_hsotg_core_init - issue softreset to the core
+ * @hsotg: The device state
+ *
+ * Issue a soft reset to the core, and await the core finishing it.
+ */
+static void s3c_hsotg_core_init(struct s3c_hsotg *hsotg)
+{
+	s3c_hsotg_corereset(hsotg);
+
+	/*
+	 * we must now enable ep0 ready for host detection and then
+	 * set configuration.
+	 */
+
+	/* set the PLL on, remove the HNP/SRP and set the PHY */
+	writel(GUSBCFG_PHYIf16 | GUSBCFG_TOutCal(7) |
+	       (0x5 << 10), hsotg->regs + GUSBCFG);
+
+	s3c_hsotg_init_fifo(hsotg);
+
+	__orr32(hsotg->regs + DCTL, DCTL_SftDiscon);
+
+	writel(1 << 18 | DCFG_DevSpd_HS,  hsotg->regs + DCFG);
+
+	/* Clear any pending OTG interrupts */
+	writel(0xffffffff, hsotg->regs + GOTGINT);
+
+	/* Clear any pending interrupts */
+	writel(0xffffffff, hsotg->regs + GINTSTS);
+
+	writel(GINTSTS_ErlySusp | GINTSTS_SessReqInt |
+	       GINTSTS_GOUTNakEff | GINTSTS_GINNakEff |
+	       GINTSTS_ConIDStsChng | GINTSTS_USBRst |
+	       GINTSTS_EnumDone | GINTSTS_OTGInt |
+	       GINTSTS_USBSusp | GINTSTS_WkUpInt,
+	       hsotg->regs + GINTMSK);
+
+	if (using_dma(hsotg))
+		writel(GAHBCFG_GlblIntrEn | GAHBCFG_DMAEn |
+		       GAHBCFG_HBstLen_Incr4,
+		       hsotg->regs + GAHBCFG);
+	else
+		writel(GAHBCFG_GlblIntrEn, hsotg->regs + GAHBCFG);
+
+	/*
+	 * Enabling INTknTXFEmpMsk here seems to be a big mistake, we end
+	 * up being flooded with interrupts if the host is polling the
+	 * endpoint to try and read data.
+	 */
+
+	writel(((hsotg->dedicated_fifos) ? DIEPMSK_TxFIFOEmpty : 0) |
+	       DIEPMSK_EPDisbldMsk | DIEPMSK_XferComplMsk |
+	       DIEPMSK_TimeOUTMsk | DIEPMSK_AHBErrMsk |
+	       DIEPMSK_INTknEPMisMsk,
+	       hsotg->regs + DIEPMSK);
+
+	/*
+	 * don't need XferCompl, we get that from RXFIFO in slave mode. In
+	 * DMA mode we may need this.
+	 */
+	writel((using_dma(hsotg) ? (DIEPMSK_XferComplMsk |
+				    DIEPMSK_TimeOUTMsk) : 0) |
+	       DOEPMSK_EPDisbldMsk | DOEPMSK_AHBErrMsk |
+	       DOEPMSK_SetupMsk,
+	       hsotg->regs + DOEPMSK);
+
+	writel(0, hsotg->regs + DAINTMSK);
+
+	dev_dbg(hsotg->dev, "EP0: DIEPCTL0=0x%08x, DOEPCTL0=0x%08x\n",
+		readl(hsotg->regs + DIEPCTL0),
+		readl(hsotg->regs + DOEPCTL0));
+
+	/* enable in and out endpoint interrupts */
+	s3c_hsotg_en_gsint(hsotg, GINTSTS_OEPInt | GINTSTS_IEPInt);
+
+	/*
+	 * Enable the RXFIFO when in slave mode, as this is how we collect
+	 * the data. In DMA mode, we get events from the FIFO but also
+	 * things we cannot process, so do not use it.
+	 */
+	if (!using_dma(hsotg))
+		s3c_hsotg_en_gsint(hsotg, GINTSTS_RxFLvl);
+
+	/* Enable interrupts for EP0 in and out */
+	s3c_hsotg_ctrl_epint(hsotg, 0, 0, 1);
+	s3c_hsotg_ctrl_epint(hsotg, 0, 1, 1);
+
+	__orr32(hsotg->regs + DCTL, DCTL_PWROnPrgDone);
+	udelay(10);  /* see openiboot */
+	__bic32(hsotg->regs + DCTL, DCTL_PWROnPrgDone);
+
+	dev_dbg(hsotg->dev, "DCTL=0x%08x\n", readl(hsotg->regs + DCTL));
+
+	/*
+	 * DxEPCTL_USBActEp says RO in manual, but seems to be set by
+	 * writing to the EPCTL register..
+	 */
+
+	/* set to read 1 8byte packet */
+	writel(DxEPTSIZ_MC(1) | DxEPTSIZ_PktCnt(1) |
+	       DxEPTSIZ_XferSize(8), hsotg->regs + DOEPTSIZ0);
+
+	writel(s3c_hsotg_ep0_mps(hsotg->eps[0].ep.maxpacket) |
+	       DxEPCTL_CNAK | DxEPCTL_EPEna |
+	       DxEPCTL_USBActEp,
+	       hsotg->regs + DOEPCTL0);
+
+	/* enable, but don't activate EP0in */
+	writel(s3c_hsotg_ep0_mps(hsotg->eps[0].ep.maxpacket) |
+	       DxEPCTL_USBActEp, hsotg->regs + DIEPCTL0);
+
+	s3c_hsotg_enqueue_setup(hsotg);
+
+	dev_dbg(hsotg->dev, "EP0: DIEPCTL0=0x%08x, DOEPCTL0=0x%08x\n",
+		readl(hsotg->regs + DIEPCTL0),
+		readl(hsotg->regs + DOEPCTL0));
+
+	/* clear global NAKs */
+	writel(DCTL_CGOUTNak | DCTL_CGNPInNAK,
+	       hsotg->regs + DCTL);
+
+	/* must be at-least 3ms to allow bus to see disconnect */
+	mdelay(3);
+
+	/* remove the soft-disconnect and let's go */
+	__bic32(hsotg->regs + DCTL, DCTL_SftDiscon);
+}
 
 /**
  * s3c_hsotg_irq - handle device interrupt
@@ -2098,52 +2389,45 @@ static irqreturn_t s3c_hsotg_irq(int irq, void *pw)
 	u32 gintmsk;
 
 irq_retry:
-	gintsts = readl(hsotg->regs + S3C_GINTSTS);
-	gintmsk = readl(hsotg->regs + S3C_GINTMSK);
+	gintsts = readl(hsotg->regs + GINTSTS);
+	gintmsk = readl(hsotg->regs + GINTMSK);
 
 	dev_dbg(hsotg->dev, "%s: %08x %08x (%08x) retry %d\n",
 		__func__, gintsts, gintsts & gintmsk, gintmsk, retry_count);
 
 	gintsts &= gintmsk;
 
-	if (gintsts & S3C_GINTSTS_OTGInt) {
-		u32 otgint = readl(hsotg->regs + S3C_GOTGINT);
+	if (gintsts & GINTSTS_OTGInt) {
+		u32 otgint = readl(hsotg->regs + GOTGINT);
 
 		dev_info(hsotg->dev, "OTGInt: %08x\n", otgint);
 
-		writel(otgint, hsotg->regs + S3C_GOTGINT);
-	}
-
-	if (gintsts & S3C_GINTSTS_DisconnInt) {
-		dev_dbg(hsotg->dev, "%s: DisconnInt\n", __func__);
-		writel(S3C_GINTSTS_DisconnInt, hsotg->regs + S3C_GINTSTS);
-
-		s3c_hsotg_disconnect_irq(hsotg);
+		writel(otgint, hsotg->regs + GOTGINT);
 	}
 
-	if (gintsts & S3C_GINTSTS_SessReqInt) {
+	if (gintsts & GINTSTS_SessReqInt) {
 		dev_dbg(hsotg->dev, "%s: SessReqInt\n", __func__);
-		writel(S3C_GINTSTS_SessReqInt, hsotg->regs + S3C_GINTSTS);
+		writel(GINTSTS_SessReqInt, hsotg->regs + GINTSTS);
 	}
 
-	if (gintsts & S3C_GINTSTS_EnumDone) {
-		writel(S3C_GINTSTS_EnumDone, hsotg->regs + S3C_GINTSTS);
+	if (gintsts & GINTSTS_EnumDone) {
+		writel(GINTSTS_EnumDone, hsotg->regs + GINTSTS);
 
 		s3c_hsotg_irq_enumdone(hsotg);
 	}
 
-	if (gintsts & S3C_GINTSTS_ConIDStsChng) {
+	if (gintsts & GINTSTS_ConIDStsChng) {
 		dev_dbg(hsotg->dev, "ConIDStsChg (DSTS=0x%08x, GOTCTL=%08x)\n",
-			readl(hsotg->regs + S3C_DSTS),
-			readl(hsotg->regs + S3C_GOTGCTL));
+			readl(hsotg->regs + DSTS),
+			readl(hsotg->regs + GOTGCTL));
 
-		writel(S3C_GINTSTS_ConIDStsChng, hsotg->regs + S3C_GINTSTS);
+		writel(GINTSTS_ConIDStsChng, hsotg->regs + GINTSTS);
 	}
 
-	if (gintsts & (S3C_GINTSTS_OEPInt | S3C_GINTSTS_IEPInt)) {
-		u32 daint = readl(hsotg->regs + S3C_DAINT);
-		u32 daint_out = daint >> S3C_DAINT_OutEP_SHIFT;
-		u32 daint_in = daint & ~(daint_out << S3C_DAINT_OutEP_SHIFT);
+	if (gintsts & (GINTSTS_OEPInt | GINTSTS_IEPInt)) {
+		u32 daint = readl(hsotg->regs + DAINT);
+		u32 daint_out = daint >> DAINT_OutEP_SHIFT;
+		u32 daint_in = daint & ~(daint_out << DAINT_OutEP_SHIFT);
 		int ep;
 
 		dev_dbg(hsotg->dev, "%s: daint=%08x\n", __func__, daint);
@@ -2159,102 +2443,116 @@ irq_retry:
 		}
 	}
 
-	if (gintsts & S3C_GINTSTS_USBRst) {
+	if (gintsts & GINTSTS_USBRst) {
+
+		u32 usb_status = readl(hsotg->regs + GOTGCTL);
+
 		dev_info(hsotg->dev, "%s: USBRst\n", __func__);
 		dev_dbg(hsotg->dev, "GNPTXSTS=%08x\n",
-			readl(hsotg->regs + S3C_GNPTXSTS));
+			readl(hsotg->regs + GNPTXSTS));
 
-		writel(S3C_GINTSTS_USBRst, hsotg->regs + S3C_GINTSTS);
+		writel(GINTSTS_USBRst, hsotg->regs + GINTSTS);
 
-		kill_all_requests(hsotg, &hsotg->eps[0], -ECONNRESET, true);
+		if (usb_status & GOTGCTL_BSESVLD) {
+			if (time_after(jiffies, hsotg->last_rst +
+				       msecs_to_jiffies(200))) {
 
-		/* it seems after a reset we can end up with a situation
-		 * where the TXFIFO still has data in it... the docs
-		 * suggest resetting all the fifos, so use the init_fifo
-		 * code to relayout and flush the fifos.
-		 */
+				kill_all_requests(hsotg, &hsotg->eps[0],
+							  -ECONNRESET, true);
 
-		s3c_hsotg_init_fifo(hsotg);
-
-		s3c_hsotg_enqueue_setup(hsotg);
+				s3c_hsotg_core_init(hsotg);
+				hsotg->last_rst = jiffies;
+			}
+		}
 	}
 
 	/* check both FIFOs */
 
-	if (gintsts & S3C_GINTSTS_NPTxFEmp) {
+	if (gintsts & GINTSTS_NPTxFEmp) {
 		dev_dbg(hsotg->dev, "NPTxFEmp\n");
 
-		/* Disable the interrupt to stop it happening again
+		/*
+		 * Disable the interrupt to stop it happening again
 		 * unless one of these endpoint routines decides that
-		 * it needs re-enabling */
+		 * it needs re-enabling
+		 */
 
-		s3c_hsotg_disable_gsint(hsotg, S3C_GINTSTS_NPTxFEmp);
+		s3c_hsotg_disable_gsint(hsotg, GINTSTS_NPTxFEmp);
 		s3c_hsotg_irq_fifoempty(hsotg, false);
 	}
 
-	if (gintsts & S3C_GINTSTS_PTxFEmp) {
+	if (gintsts & GINTSTS_PTxFEmp) {
 		dev_dbg(hsotg->dev, "PTxFEmp\n");
 
-		/* See note in S3C_GINTSTS_NPTxFEmp */
+		/* See note in GINTSTS_NPTxFEmp */
 
-		s3c_hsotg_disable_gsint(hsotg, S3C_GINTSTS_PTxFEmp);
+		s3c_hsotg_disable_gsint(hsotg, GINTSTS_PTxFEmp);
 		s3c_hsotg_irq_fifoempty(hsotg, true);
 	}
 
-	if (gintsts & S3C_GINTSTS_RxFLvl) {
-		/* note, since GINTSTS_RxFLvl doubles as FIFO-not-empty,
+	if (gintsts & GINTSTS_RxFLvl) {
+		/*
+		 * note, since GINTSTS_RxFLvl doubles as FIFO-not-empty,
 		 * we need to retry s3c_hsotg_handle_rx if this is still
-		 * set. */
+		 * set.
+		 */
 
 		s3c_hsotg_handle_rx(hsotg);
 	}
 
-	if (gintsts & S3C_GINTSTS_ModeMis) {
+	if (gintsts & GINTSTS_ModeMis) {
 		dev_warn(hsotg->dev, "warning, mode mismatch triggered\n");
-		writel(S3C_GINTSTS_ModeMis, hsotg->regs + S3C_GINTSTS);
+		writel(GINTSTS_ModeMis, hsotg->regs + GINTSTS);
 	}
 
-	if (gintsts & S3C_GINTSTS_USBSusp) {
-		dev_info(hsotg->dev, "S3C_GINTSTS_USBSusp\n");
-		writel(S3C_GINTSTS_USBSusp, hsotg->regs + S3C_GINTSTS);
+	if (gintsts & GINTSTS_USBSusp) {
+		dev_info(hsotg->dev, "GINTSTS_USBSusp\n");
+		writel(GINTSTS_USBSusp, hsotg->regs + GINTSTS);
 
 		call_gadget(hsotg, suspend);
+		s3c_hsotg_disconnect(hsotg);
 	}
 
-	if (gintsts & S3C_GINTSTS_WkUpInt) {
-		dev_info(hsotg->dev, "S3C_GINTSTS_WkUpIn\n");
-		writel(S3C_GINTSTS_WkUpInt, hsotg->regs + S3C_GINTSTS);
+	if (gintsts & GINTSTS_WkUpInt) {
+		dev_info(hsotg->dev, "GINTSTS_WkUpIn\n");
+		writel(GINTSTS_WkUpInt, hsotg->regs + GINTSTS);
 
 		call_gadget(hsotg, resume);
 	}
 
-	if (gintsts & S3C_GINTSTS_ErlySusp) {
-		dev_dbg(hsotg->dev, "S3C_GINTSTS_ErlySusp\n");
-		writel(S3C_GINTSTS_ErlySusp, hsotg->regs + S3C_GINTSTS);
+	if (gintsts & GINTSTS_ErlySusp) {
+		dev_dbg(hsotg->dev, "GINTSTS_ErlySusp\n");
+		writel(GINTSTS_ErlySusp, hsotg->regs + GINTSTS);
+
+		s3c_hsotg_disconnect(hsotg);
 	}
 
-	/* these next two seem to crop-up occasionally causing the core
+	/*
+	 * these next two seem to crop-up occasionally causing the core
 	 * to shutdown the USB transfer, so try clearing them and logging
-	 * the occurrence. */
+	 * the occurrence.
+	 */
 
-	if (gintsts & S3C_GINTSTS_GOUTNakEff) {
+	if (gintsts & GINTSTS_GOUTNakEff) {
 		dev_info(hsotg->dev, "GOUTNakEff triggered\n");
 
-		writel(S3C_DCTL_CGOUTNak, hsotg->regs + S3C_DCTL);
+		writel(DCTL_CGOUTNak, hsotg->regs + DCTL);
 
 		s3c_hsotg_dump(hsotg);
 	}
 
-	if (gintsts & S3C_GINTSTS_GINNakEff) {
+	if (gintsts & GINTSTS_GINNakEff) {
 		dev_info(hsotg->dev, "GINNakEff triggered\n");
 
-		writel(S3C_DCTL_CGNPInNAK, hsotg->regs + S3C_DCTL);
+		writel(DCTL_CGNPInNAK, hsotg->regs + DCTL);
 
 		s3c_hsotg_dump(hsotg);
 	}
 
-	/* if we've had fifo events, we should try and go around the
-	 * loop again to see if there's any point in returning yet. */
+	/*
+	 * if we've had fifo events, we should try and go around the
+	 * loop again to see if there's any point in returning yet.
+	 */
 
 	if (gintsts & IRQ_RETRY_MASK && --retry_count > 0)
 			goto irq_retry;
@@ -2268,7 +2566,7 @@ irq_retry:
  * @desc: The USB endpoint descriptor to configure with.
  *
  * This is called from the USB gadget code's usb_ep_enable().
-*/
+ */
 static int s3c_hsotg_ep_enable(struct usb_ep *ep,
 			       const struct usb_endpoint_descriptor *desc)
 {
@@ -2300,7 +2598,7 @@ static int s3c_hsotg_ep_enable(struct usb_ep *ep,
 
 	/* note, we handle this here instead of s3c_hsotg_set_ep_maxpacket */
 
-	epctrl_reg = dir_in ? S3C_DIEPCTL(index) : S3C_DOEPCTL(index);
+	epctrl_reg = dir_in ? DIEPCTL(index) : DOEPCTL(index);
 	epctrl = readl(hsotg->regs + epctrl_reg);
 
 	dev_dbg(hsotg->dev, "%s: read DxEPCTL=0x%08x from 0x%08x\n",
@@ -2308,20 +2606,23 @@ static int s3c_hsotg_ep_enable(struct usb_ep *ep,
 
 	spin_lock_irqsave(&hs_ep->lock, flags);
 
-	epctrl &= ~(S3C_DxEPCTL_EPType_MASK | S3C_DxEPCTL_MPS_MASK);
-	epctrl |= S3C_DxEPCTL_MPS(mps);
+	epctrl &= ~(DxEPCTL_EPType_MASK | DxEPCTL_MPS_MASK);
+	epctrl |= DxEPCTL_MPS(mps);
 
-	/* mark the endpoint as active, otherwise the core may ignore
-	 * transactions entirely for this endpoint */
-	epctrl |= S3C_DxEPCTL_USBActEp;
+	/*
+	 * mark the endpoint as active, otherwise the core may ignore
+	 * transactions entirely for this endpoint
+	 */
+	epctrl |= DxEPCTL_USBActEp;
 
-	/* set the NAK status on the endpoint, otherwise we might try and
+	/*
+	 * set the NAK status on the endpoint, otherwise we might try and
 	 * do something with data that we've yet got a request to process
 	 * since the RXFIFO will take data for an endpoint even if the
 	 * size register hasn't been set.
 	 */
 
-	epctrl |= S3C_DxEPCTL_SNAK;
+	epctrl |= DxEPCTL_SNAK;
 
 	/* update the endpoint state */
 	hs_ep->ep.maxpacket = mps;
@@ -2336,37 +2637,40 @@ static int s3c_hsotg_ep_enable(struct usb_ep *ep,
 		goto out;
 
 	case USB_ENDPOINT_XFER_BULK:
-		epctrl |= S3C_DxEPCTL_EPType_Bulk;
+		epctrl |= DxEPCTL_EPType_Bulk;
 		break;
 
 	case USB_ENDPOINT_XFER_INT:
 		if (dir_in) {
-			/* Allocate our TxFNum by simply using the index
+			/*
+			 * Allocate our TxFNum by simply using the index
 			 * of the endpoint for the moment. We could do
 			 * something better if the host indicates how
-			 * many FIFOs we are expecting to use. */
+			 * many FIFOs we are expecting to use.
+			 */
 
 			hs_ep->periodic = 1;
-			epctrl |= S3C_DxEPCTL_TxFNum(index);
+			epctrl |= DxEPCTL_TxFNum(index);
 		}
 
-		epctrl |= S3C_DxEPCTL_EPType_Intterupt;
+		epctrl |= DxEPCTL_EPType_Intterupt;
 		break;
 
 	case USB_ENDPOINT_XFER_CONTROL:
-		epctrl |= S3C_DxEPCTL_EPType_Control;
+		epctrl |= DxEPCTL_EPType_Control;
 		break;
 	}
 
-	/* if the hardware has dedicated fifos, we must give each IN EP
+	/*
+	 * if the hardware has dedicated fifos, we must give each IN EP
 	 * a unique tx-fifo even if it is non-periodic.
 	 */
 	if (dir_in && hsotg->dedicated_fifos)
-		epctrl |= S3C_DxEPCTL_TxFNum(index);
+		epctrl |= DxEPCTL_TxFNum(index);
 
 	/* for non control endpoints, set PID to D0 */
 	if (index)
-		epctrl |= S3C_DxEPCTL_SetD0PID;
+		epctrl |= DxEPCTL_SetD0PID;
 
 	dev_dbg(hsotg->dev, "%s: write DxEPCTL=0x%08x\n",
 		__func__, epctrl);
@@ -2383,6 +2687,10 @@ out:
 	return ret;
 }
 
+/**
+ * s3c_hsotg_ep_disable - disable given endpoint
+ * @ep: The endpoint to disable.
+ */
 static int s3c_hsotg_ep_disable(struct usb_ep *ep)
 {
 	struct s3c_hsotg_ep *hs_ep = our_ep(ep);
@@ -2400,7 +2708,7 @@ static int s3c_hsotg_ep_disable(struct usb_ep *ep)
 		return -EINVAL;
 	}
 
-	epctrl_reg = dir_in ? S3C_DIEPCTL(index) : S3C_DOEPCTL(index);
+	epctrl_reg = dir_in ? DIEPCTL(index) : DOEPCTL(index);
 
 	/* terminate all requests with shutdown */
 	kill_all_requests(hsotg, hs_ep, -ESHUTDOWN, false);
@@ -2408,9 +2716,9 @@ static int s3c_hsotg_ep_disable(struct usb_ep *ep)
 	spin_lock_irqsave(&hs_ep->lock, flags);
 
 	ctrl = readl(hsotg->regs + epctrl_reg);
-	ctrl &= ~S3C_DxEPCTL_EPEna;
-	ctrl &= ~S3C_DxEPCTL_USBActEp;
-	ctrl |= S3C_DxEPCTL_SNAK;
+	ctrl &= ~DxEPCTL_EPEna;
+	ctrl &= ~DxEPCTL_USBActEp;
+	ctrl |= DxEPCTL_SNAK;
 
 	dev_dbg(hsotg->dev, "%s: DxEPCTL=0x%08x\n", __func__, ctrl);
 	writel(ctrl, hsotg->regs + epctrl_reg);
@@ -2426,7 +2734,7 @@ static int s3c_hsotg_ep_disable(struct usb_ep *ep)
  * on_list - check request is on the given endpoint
  * @ep: The endpoint to check.
  * @test: The request to test if it is on the endpoint.
-*/
+ */
 static bool on_list(struct s3c_hsotg_ep *ep, struct s3c_hsotg_req *test)
 {
 	struct s3c_hsotg_req *req, *treq;
@@ -2439,6 +2747,11 @@ static bool on_list(struct s3c_hsotg_ep *ep, struct s3c_hsotg_req *test)
 	return false;
 }
 
+/**
+ * s3c_hsotg_ep_dequeue - dequeue given endpoint
+ * @ep: The endpoint to dequeue.
+ * @req: The request to be removed from a queue.
+ */
 static int s3c_hsotg_ep_dequeue(struct usb_ep *ep, struct usb_request *req)
 {
 	struct s3c_hsotg_req *hs_req = our_req(req);
@@ -2461,6 +2774,11 @@ static int s3c_hsotg_ep_dequeue(struct usb_ep *ep, struct usb_request *req)
 	return 0;
 }
 
+/**
+ * s3c_hsotg_ep_sethalt - set halt on a given endpoint
+ * @ep: The endpoint to set halt.
+ * @value: Set or unset the halt.
+ */
 static int s3c_hsotg_ep_sethalt(struct usb_ep *ep, int value)
 {
 	struct s3c_hsotg_ep *hs_ep = our_ep(ep);
@@ -2477,34 +2795,34 @@ static int s3c_hsotg_ep_sethalt(struct usb_ep *ep, int value)
 
 	/* write both IN and OUT control registers */
 
-	epreg = S3C_DIEPCTL(index);
+	epreg = DIEPCTL(index);
 	epctl = readl(hs->regs + epreg);
 
 	if (value) {
-		epctl |= S3C_DxEPCTL_Stall + S3C_DxEPCTL_SNAK;
-		if (epctl & S3C_DxEPCTL_EPEna)
-			epctl |= S3C_DxEPCTL_EPDis;
+		epctl |= DxEPCTL_Stall + DxEPCTL_SNAK;
+		if (epctl & DxEPCTL_EPEna)
+			epctl |= DxEPCTL_EPDis;
 	} else {
-		epctl &= ~S3C_DxEPCTL_Stall;
-		xfertype = epctl & S3C_DxEPCTL_EPType_MASK;
-		if (xfertype == S3C_DxEPCTL_EPType_Bulk ||
-			xfertype == S3C_DxEPCTL_EPType_Intterupt)
-				epctl |= S3C_DxEPCTL_SetD0PID;
+		epctl &= ~DxEPCTL_Stall;
+		xfertype = epctl & DxEPCTL_EPType_MASK;
+		if (xfertype == DxEPCTL_EPType_Bulk ||
+			xfertype == DxEPCTL_EPType_Intterupt)
+				epctl |= DxEPCTL_SetD0PID;
 	}
 
 	writel(epctl, hs->regs + epreg);
 
-	epreg = S3C_DOEPCTL(index);
+	epreg = DOEPCTL(index);
 	epctl = readl(hs->regs + epreg);
 
 	if (value)
-		epctl |= S3C_DxEPCTL_Stall;
+		epctl |= DxEPCTL_Stall;
 	else {
-		epctl &= ~S3C_DxEPCTL_Stall;
-		xfertype = epctl & S3C_DxEPCTL_EPType_MASK;
-		if (xfertype == S3C_DxEPCTL_EPType_Bulk ||
-			xfertype == S3C_DxEPCTL_EPType_Intterupt)
-				epctl |= S3C_DxEPCTL_SetD0PID;
+		epctl &= ~DxEPCTL_Stall;
+		xfertype = epctl & DxEPCTL_EPType_MASK;
+		if (xfertype == DxEPCTL_EPType_Bulk ||
+			xfertype == DxEPCTL_EPType_Intterupt)
+				epctl |= DxEPCTL_SetD0PID;
 	}
 
 	writel(epctl, hs->regs + epreg);
@@ -2526,57 +2844,91 @@ static struct usb_ep_ops s3c_hsotg_ep_ops = {
 };
 
 /**
- * s3c_hsotg_corereset - issue softreset to the core
- * @hsotg: The device state
+ * s3c_hsotg_phy_enable - enable platform phy dev
+ * @hsotg: The driver state
  *
- * Issue a soft reset to the core, and await the core finishing it.
-*/
-static int s3c_hsotg_corereset(struct s3c_hsotg *hsotg)
+ * A wrapper for platform code responsible for controlling
+ * low-level USB code
+ */
+static void s3c_hsotg_phy_enable(struct s3c_hsotg *hsotg)
 {
-	int timeout;
-	u32 grstctl;
+	struct platform_device *pdev = to_platform_device(hsotg->dev);
 
-	dev_dbg(hsotg->dev, "resetting core\n");
+	dev_dbg(hsotg->dev, "pdev 0x%p\n", pdev);
+	if (hsotg->plat->phy_init)
+		hsotg->plat->phy_init(pdev, hsotg->plat->phy_type);
+}
 
-	/* issue soft reset */
-	writel(S3C_GRSTCTL_CSftRst, hsotg->regs + S3C_GRSTCTL);
+/**
+ * s3c_hsotg_phy_disable - disable platform phy dev
+ * @hsotg: The driver state
+ *
+ * A wrapper for platform code responsible for controlling
+ * low-level USB code
+ */
+static void s3c_hsotg_phy_disable(struct s3c_hsotg *hsotg)
+{
+	struct platform_device *pdev = to_platform_device(hsotg->dev);
 
-	timeout = 1000;
-	do {
-		grstctl = readl(hsotg->regs + S3C_GRSTCTL);
-	} while ((grstctl & S3C_GRSTCTL_CSftRst) && timeout-- > 0);
+	if (hsotg->plat->phy_exit)
+		hsotg->plat->phy_exit(pdev, hsotg->plat->phy_type);
+}
 
-	if (grstctl & S3C_GRSTCTL_CSftRst) {
-		dev_err(hsotg->dev, "Failed to get CSftRst asserted\n");
-		return -EINVAL;
-	}
+/**
+ * s3c_hsotg_init - initalize the usb core
+ * @hsotg: The driver state
+ */
+static void s3c_hsotg_init(struct s3c_hsotg *hsotg)
+{
+	/* unmask subset of endpoint interrupts */
 
-	timeout = 1000;
+	writel(DIEPMSK_TimeOUTMsk | DIEPMSK_AHBErrMsk |
+	       DIEPMSK_EPDisbldMsk | DIEPMSK_XferComplMsk,
+	       hsotg->regs + DIEPMSK);
 
-	while (1) {
-		u32 grstctl = readl(hsotg->regs + S3C_GRSTCTL);
+	writel(DOEPMSK_SetupMsk | DOEPMSK_AHBErrMsk |
+	       DOEPMSK_EPDisbldMsk | DOEPMSK_XferComplMsk,
+	       hsotg->regs + DOEPMSK);
 
-		if (timeout-- < 0) {
-			dev_info(hsotg->dev,
-				 "%s: reset failed, GRSTCTL=%08x\n",
-				 __func__, grstctl);
-			return -ETIMEDOUT;
-		}
+	writel(0, hsotg->regs + DAINTMSK);
 
-		if (!(grstctl & S3C_GRSTCTL_AHBIdle))
-			continue;
+	/* Be in disconnected state until gadget is registered */
+	__orr32(hsotg->regs + DCTL, DCTL_SftDiscon);
 
-		break;		/* reset done */
+	if (0) {
+		/* post global nak until we're ready */
+		writel(DCTL_SGNPInNAK | DCTL_SGOUTNak,
+		       hsotg->regs + DCTL);
 	}
 
-	dev_dbg(hsotg->dev, "reset successful\n");
-	return 0;
+	/* setup fifos */
+
+	dev_dbg(hsotg->dev, "GRXFSIZ=0x%08x, GNPTXFSIZ=0x%08x\n",
+		readl(hsotg->regs + GRXFSIZ),
+		readl(hsotg->regs + GNPTXFSIZ));
+
+	s3c_hsotg_init_fifo(hsotg);
+
+	/* set the PLL on, remove the HNP/SRP and set the PHY */
+	writel(GUSBCFG_PHYIf16 | GUSBCFG_TOutCal(7) | (0x5 << 10),
+	       hsotg->regs + GUSBCFG);
+
+	writel(using_dma(hsotg) ? GAHBCFG_DMAEn : 0x0,
+	       hsotg->regs + GAHBCFG);
 }
 
-static int s3c_hsotg_start(struct usb_gadget_driver *driver,
-		int (*bind)(struct usb_gadget *))
+/**
+ * s3c_hsotg_udc_start - prepare the udc for work
+ * @gadget: The usb gadget state
+ * @driver: The usb gadget driver
+ *
+ * Perform initialization to prepare udc device and driver
+ * to work.
+ */
+static int s3c_hsotg_udc_start(struct usb_gadget *gadget,
+			   struct usb_gadget_driver *driver)
 {
-	struct s3c_hsotg *hsotg = our_hsotg;
+	struct s3c_hsotg *hsotg = to_hsotg(gadget);
 	int ret;
 
 	if (!hsotg) {
@@ -2592,7 +2944,7 @@ static int s3c_hsotg_start(struct usb_gadget_driver *driver,
 	if (driver->max_speed < USB_SPEED_FULL)
 		dev_err(hsotg->dev, "%s: bad speed\n", __func__);
 
-	if (!bind || !driver->setup) {
+	if (!driver->setup) {
 		dev_err(hsotg->dev, "%s: missing entry points\n", __func__);
 		return -EINVAL;
 	}
@@ -2605,135 +2957,17 @@ static int s3c_hsotg_start(struct usb_gadget_driver *driver,
 	hsotg->gadget.dev.dma_mask = hsotg->dev->dma_mask;
 	hsotg->gadget.speed = USB_SPEED_UNKNOWN;
 
-	ret = device_add(&hsotg->gadget.dev);
+	ret = regulator_bulk_enable(ARRAY_SIZE(hsotg->supplies),
+				    hsotg->supplies);
 	if (ret) {
-		dev_err(hsotg->dev, "failed to register gadget device\n");
+		dev_err(hsotg->dev, "failed to enable supplies: %d\n", ret);
 		goto err;
 	}
 
-	ret = bind(&hsotg->gadget);
-	if (ret) {
-		dev_err(hsotg->dev, "failed bind %s\n", driver->driver.name);
-
-		hsotg->gadget.dev.driver = NULL;
-		hsotg->driver = NULL;
-		goto err;
-	}
-
-	/* we must now enable ep0 ready for host detection and then
-	 * set configuration. */
-
-	s3c_hsotg_corereset(hsotg);
-
-	/* set the PLL on, remove the HNP/SRP and set the PHY */
-	writel(S3C_GUSBCFG_PHYIf16 | S3C_GUSBCFG_TOutCal(7) |
-	       (0x5 << 10), hsotg->regs + S3C_GUSBCFG);
-
-	/* looks like soft-reset changes state of FIFOs */
-	s3c_hsotg_init_fifo(hsotg);
-
-	__orr32(hsotg->regs + S3C_DCTL, S3C_DCTL_SftDiscon);
-
-	writel(1 << 18 | S3C_DCFG_DevSpd_HS,  hsotg->regs + S3C_DCFG);
-
-	/* Clear any pending OTG interrupts */
-	writel(0xffffffff, hsotg->regs + S3C_GOTGINT);
-
-	/* Clear any pending interrupts */
-	writel(0xffffffff, hsotg->regs + S3C_GINTSTS);
-
-	writel(S3C_GINTSTS_DisconnInt | S3C_GINTSTS_SessReqInt |
-	       S3C_GINTSTS_ConIDStsChng | S3C_GINTSTS_USBRst |
-	       S3C_GINTSTS_EnumDone | S3C_GINTSTS_OTGInt |
-	       S3C_GINTSTS_USBSusp | S3C_GINTSTS_WkUpInt |
-	       S3C_GINTSTS_GOUTNakEff | S3C_GINTSTS_GINNakEff |
-	       S3C_GINTSTS_ErlySusp,
-	       hsotg->regs + S3C_GINTMSK);
-
-	if (using_dma(hsotg))
-		writel(S3C_GAHBCFG_GlblIntrEn | S3C_GAHBCFG_DMAEn |
-		       S3C_GAHBCFG_HBstLen_Incr4,
-		       hsotg->regs + S3C_GAHBCFG);
-	else
-		writel(S3C_GAHBCFG_GlblIntrEn, hsotg->regs + S3C_GAHBCFG);
-
-	/* Enabling INTknTXFEmpMsk here seems to be a big mistake, we end
-	 * up being flooded with interrupts if the host is polling the
-	 * endpoint to try and read data. */
-
-	writel(S3C_DIEPMSK_TimeOUTMsk | S3C_DIEPMSK_AHBErrMsk |
-	       S3C_DIEPMSK_INTknEPMisMsk |
-	       S3C_DIEPMSK_EPDisbldMsk | S3C_DIEPMSK_XferComplMsk |
-	       ((hsotg->dedicated_fifos) ? S3C_DIEPMSK_TxFIFOEmpty : 0),
-	       hsotg->regs + S3C_DIEPMSK);
-
-	/* don't need XferCompl, we get that from RXFIFO in slave mode. In
-	 * DMA mode we may need this. */
-	writel(S3C_DOEPMSK_SetupMsk | S3C_DOEPMSK_AHBErrMsk |
-	       S3C_DOEPMSK_EPDisbldMsk |
-	       (using_dma(hsotg) ? (S3C_DIEPMSK_XferComplMsk |
-				   S3C_DIEPMSK_TimeOUTMsk) : 0),
-	       hsotg->regs + S3C_DOEPMSK);
-
-	writel(0, hsotg->regs + S3C_DAINTMSK);
-
-	dev_dbg(hsotg->dev, "EP0: DIEPCTL0=0x%08x, DOEPCTL0=0x%08x\n",
-		readl(hsotg->regs + S3C_DIEPCTL0),
-		readl(hsotg->regs + S3C_DOEPCTL0));
-
-	/* enable in and out endpoint interrupts */
-	s3c_hsotg_en_gsint(hsotg, S3C_GINTSTS_OEPInt | S3C_GINTSTS_IEPInt);
-
-	/* Enable the RXFIFO when in slave mode, as this is how we collect
-	 * the data. In DMA mode, we get events from the FIFO but also
-	 * things we cannot process, so do not use it. */
-	if (!using_dma(hsotg))
-		s3c_hsotg_en_gsint(hsotg, S3C_GINTSTS_RxFLvl);
-
-	/* Enable interrupts for EP0 in and out */
-	s3c_hsotg_ctrl_epint(hsotg, 0, 0, 1);
-	s3c_hsotg_ctrl_epint(hsotg, 0, 1, 1);
-
-	__orr32(hsotg->regs + S3C_DCTL, S3C_DCTL_PWROnPrgDone);
-	udelay(10);  /* see openiboot */
-	__bic32(hsotg->regs + S3C_DCTL, S3C_DCTL_PWROnPrgDone);
-
-	dev_dbg(hsotg->dev, "DCTL=0x%08x\n", readl(hsotg->regs + S3C_DCTL));
-
-	/* S3C_DxEPCTL_USBActEp says RO in manual, but seems to be set by
-	   writing to the EPCTL register.. */
-
-	/* set to read 1 8byte packet */
-	writel(S3C_DxEPTSIZ_MC(1) | S3C_DxEPTSIZ_PktCnt(1) |
-	       S3C_DxEPTSIZ_XferSize(8), hsotg->regs + DOEPTSIZ0);
-
-	writel(s3c_hsotg_ep0_mps(hsotg->eps[0].ep.maxpacket) |
-	       S3C_DxEPCTL_CNAK | S3C_DxEPCTL_EPEna |
-	       S3C_DxEPCTL_USBActEp,
-	       hsotg->regs + S3C_DOEPCTL0);
-
-	/* enable, but don't activate EP0in */
-	writel(s3c_hsotg_ep0_mps(hsotg->eps[0].ep.maxpacket) |
-	       S3C_DxEPCTL_USBActEp, hsotg->regs + S3C_DIEPCTL0);
-
-	s3c_hsotg_enqueue_setup(hsotg);
-
-	dev_dbg(hsotg->dev, "EP0: DIEPCTL0=0x%08x, DOEPCTL0=0x%08x\n",
-		readl(hsotg->regs + S3C_DIEPCTL0),
-		readl(hsotg->regs + S3C_DOEPCTL0));
-
-	/* clear global NAKs */
-	writel(S3C_DCTL_CGOUTNak | S3C_DCTL_CGNPInNAK,
-	       hsotg->regs + S3C_DCTL);
-
-	/* must be at-least 3ms to allow bus to see disconnect */
-	msleep(3);
-
-	/* remove the soft-disconnect and let's go */
-	__bic32(hsotg->regs + S3C_DCTL, S3C_DCTL_SftDiscon);
-
-	/* report to the user, and return */
+	s3c_hsotg_phy_enable(hsotg);
 
+	s3c_hsotg_core_init(hsotg);
+	hsotg->last_rst = jiffies;
 	dev_info(hsotg->dev, "bound driver %s\n", driver->driver.name);
 	return 0;
 
@@ -2743,9 +2977,17 @@ err:
 	return ret;
 }
 
-static int s3c_hsotg_stop(struct usb_gadget_driver *driver)
+/**
+ * s3c_hsotg_udc_stop - stop the udc
+ * @gadget: The usb gadget state
+ * @driver: The usb gadget driver
+ *
+ * Stop udc hw block and stay tunned for future transmissions
+ */
+static int s3c_hsotg_udc_stop(struct usb_gadget *gadget,
+			  struct usb_gadget_driver *driver)
 {
-	struct s3c_hsotg *hsotg = our_hsotg;
+	struct s3c_hsotg *hsotg = to_hsotg(gadget);
 	int ep;
 
 	if (!hsotg)
@@ -2755,16 +2997,15 @@ static int s3c_hsotg_stop(struct usb_gadget_driver *driver)
 		return -EINVAL;
 
 	/* all endpoints should be shutdown */
-	for (ep = 0; ep < S3C_HSOTG_EPS; ep++)
+	for (ep = 0; ep < hsotg->num_of_eps; ep++)
 		s3c_hsotg_ep_disable(&hsotg->eps[ep].ep);
 
-	call_gadget(hsotg, disconnect);
+	s3c_hsotg_phy_disable(hsotg);
+	regulator_bulk_disable(ARRAY_SIZE(hsotg->supplies), hsotg->supplies);
 
-	driver->unbind(&hsotg->gadget);
 	hsotg->driver = NULL;
 	hsotg->gadget.speed = USB_SPEED_UNKNOWN;
-
-	device_del(&hsotg->gadget.dev);
+	hsotg->gadget.dev.driver = NULL;
 
 	dev_info(hsotg->dev, "unregistered gadget driver '%s'\n",
 		 driver->driver.name);
@@ -2772,6 +3013,12 @@ static int s3c_hsotg_stop(struct usb_gadget_driver *driver)
 	return 0;
 }
 
+/**
+ * s3c_hsotg_gadget_getframe - read the frame number
+ * @gadget: The usb gadget state
+ *
+ * Read the {micro} frame number
+ */
 static int s3c_hsotg_gadget_getframe(struct usb_gadget *gadget)
 {
 	return s3c_hsotg_read_frameno(to_hsotg(gadget));
@@ -2779,8 +3026,8 @@ static int s3c_hsotg_gadget_getframe(struct usb_gadget *gadget)
 
 static struct usb_gadget_ops s3c_hsotg_gadget_ops = {
 	.get_frame	= s3c_hsotg_gadget_getframe,
-	.start		= s3c_hsotg_start,
-	.stop		= s3c_hsotg_stop,
+	.udc_start		= s3c_hsotg_udc_start,
+	.udc_stop		= s3c_hsotg_udc_stop,
 };
 
 /**
@@ -2827,111 +3074,42 @@ static void __devinit s3c_hsotg_initep(struct s3c_hsotg *hsotg,
 	hs_ep->ep.maxpacket = epnum ? 512 : EP0_MPS_LIMIT;
 	hs_ep->ep.ops = &s3c_hsotg_ep_ops;
 
-	/* Read the FIFO size for the Periodic TX FIFO, even if we're
+	/*
+	 * Read the FIFO size for the Periodic TX FIFO, even if we're
 	 * an OUT endpoint, we may as well do this if in future the
 	 * code is changed to make each endpoint's direction changeable.
 	 */
 
-	ptxfifo = readl(hsotg->regs + S3C_DPTXFSIZn(epnum));
-	hs_ep->fifo_size = S3C_DPTXFSIZn_DPTxFSize_GET(ptxfifo) * 4;
+	ptxfifo = readl(hsotg->regs + DPTXFSIZn(epnum));
+	hs_ep->fifo_size = DPTXFSIZn_DPTxFSize_GET(ptxfifo) * 4;
 
-	/* if we're using dma, we need to set the next-endpoint pointer
+	/*
+	 * if we're using dma, we need to set the next-endpoint pointer
 	 * to be something valid.
 	 */
 
 	if (using_dma(hsotg)) {
-		u32 next = S3C_DxEPCTL_NextEp((epnum + 1) % 15);
-		writel(next, hsotg->regs + S3C_DIEPCTL(epnum));
-		writel(next, hsotg->regs + S3C_DOEPCTL(epnum));
+		u32 next = DxEPCTL_NextEp((epnum + 1) % 15);
+		writel(next, hsotg->regs + DIEPCTL(epnum));
+		writel(next, hsotg->regs + DOEPCTL(epnum));
 	}
 }
 
 /**
- * s3c_hsotg_otgreset - reset the OtG phy block
- * @hsotg: The host state.
+ * s3c_hsotg_hw_cfg - read HW configuration registers
+ * @param: The device state
  *
- * Power up the phy, set the basic configuration and start the PHY.
+ * Read the USB core HW configuration registers
  */
-static void s3c_hsotg_otgreset(struct s3c_hsotg *hsotg)
-{
-	struct clk *xusbxti;
-	u32 pwr, osc;
-
-	pwr = readl(S3C_PHYPWR);
-	pwr &= ~0x19;
-	writel(pwr, S3C_PHYPWR);
-	mdelay(1);
-
-	osc = hsotg->plat->is_osc ? S3C_PHYCLK_EXT_OSC : 0;
-
-	xusbxti = clk_get(hsotg->dev, "xusbxti");
-	if (xusbxti && !IS_ERR(xusbxti)) {
-		switch (clk_get_rate(xusbxti)) {
-		case 12*MHZ:
-			osc |= S3C_PHYCLK_CLKSEL_12M;
-			break;
-		case 24*MHZ:
-			osc |= S3C_PHYCLK_CLKSEL_24M;
-			break;
-		default:
-		case 48*MHZ:
-			/* default reference clock */
-			break;
-		}
-		clk_put(xusbxti);
-	}
-
-	writel(osc | 0x10, S3C_PHYCLK);
-
-	/* issue a full set of resets to the otg and core */
-
-	writel(S3C_RSTCON_PHY, S3C_RSTCON);
-	udelay(20);	/* at-least 10uS */
-	writel(0, S3C_RSTCON);
-}
-
-
-static void s3c_hsotg_init(struct s3c_hsotg *hsotg)
+static void s3c_hsotg_hw_cfg(struct s3c_hsotg *hsotg)
 {
-	u32 cfg4;
-
-	/* unmask subset of endpoint interrupts */
-
-	writel(S3C_DIEPMSK_TimeOUTMsk | S3C_DIEPMSK_AHBErrMsk |
-	       S3C_DIEPMSK_EPDisbldMsk | S3C_DIEPMSK_XferComplMsk,
-	       hsotg->regs + S3C_DIEPMSK);
-
-	writel(S3C_DOEPMSK_SetupMsk | S3C_DOEPMSK_AHBErrMsk |
-	       S3C_DOEPMSK_EPDisbldMsk | S3C_DOEPMSK_XferComplMsk,
-	       hsotg->regs + S3C_DOEPMSK);
-
-	writel(0, hsotg->regs + S3C_DAINTMSK);
-
-	/* Be in disconnected state until gadget is registered */
-	__orr32(hsotg->regs + S3C_DCTL, S3C_DCTL_SftDiscon);
-
-	if (0) {
-		/* post global nak until we're ready */
-		writel(S3C_DCTL_SGNPInNAK | S3C_DCTL_SGOUTNak,
-		       hsotg->regs + S3C_DCTL);
-	}
-
-	/* setup fifos */
-
-	dev_dbg(hsotg->dev, "GRXFSIZ=0x%08x, GNPTXFSIZ=0x%08x\n",
-		readl(hsotg->regs + S3C_GRXFSIZ),
-		readl(hsotg->regs + S3C_GNPTXFSIZ));
-
-	s3c_hsotg_init_fifo(hsotg);
-
-	/* set the PLL on, remove the HNP/SRP and set the PHY */
-	writel(S3C_GUSBCFG_PHYIf16 | S3C_GUSBCFG_TOutCal(7) | (0x5 << 10),
-	       hsotg->regs + S3C_GUSBCFG);
+	u32 cfg2, cfg4;
+	/* check hardware configuration */
 
-	writel(using_dma(hsotg) ? S3C_GAHBCFG_DMAEn : 0x0,
-	       hsotg->regs + S3C_GAHBCFG);
+	cfg2 = readl(hsotg->regs + 0x48);
+	hsotg->num_of_eps = (cfg2 >> 10) & 0xF;
 
-	/* check hardware configuration */
+	dev_info(hsotg->dev, "EPs:%d\n", hsotg->num_of_eps);
 
 	cfg4 = readl(hsotg->regs + 0x50);
 	hsotg->dedicated_fifos = (cfg4 >> 25) & 1;
@@ -2940,6 +3118,10 @@ static void s3c_hsotg_init(struct s3c_hsotg *hsotg)
 		 hsotg->dedicated_fifos ? "dedicated" : "shared");
 }
 
+/**
+ * s3c_hsotg_dump - dump state of the udc
+ * @param: The device state
+ */
 static void s3c_hsotg_dump(struct s3c_hsotg *hsotg)
 {
 #ifdef DEBUG
@@ -2949,46 +3131,45 @@ static void s3c_hsotg_dump(struct s3c_hsotg *hsotg)
 	int idx;
 
 	dev_info(dev, "DCFG=0x%08x, DCTL=0x%08x, DIEPMSK=%08x\n",
-		 readl(regs + S3C_DCFG), readl(regs + S3C_DCTL),
-		 readl(regs + S3C_DIEPMSK));
+		 readl(regs + DCFG), readl(regs + DCTL),
+		 readl(regs + DIEPMSK));
 
 	dev_info(dev, "GAHBCFG=0x%08x, 0x44=0x%08x\n",
-		 readl(regs + S3C_GAHBCFG), readl(regs + 0x44));
+		 readl(regs + GAHBCFG), readl(regs + 0x44));
 
 	dev_info(dev, "GRXFSIZ=0x%08x, GNPTXFSIZ=0x%08x\n",
-		 readl(regs + S3C_GRXFSIZ), readl(regs + S3C_GNPTXFSIZ));
+		 readl(regs + GRXFSIZ), readl(regs + GNPTXFSIZ));
 
 	/* show periodic fifo settings */
 
 	for (idx = 1; idx <= 15; idx++) {
-		val = readl(regs + S3C_DPTXFSIZn(idx));
+		val = readl(regs + DPTXFSIZn(idx));
 		dev_info(dev, "DPTx[%d] FSize=%d, StAddr=0x%08x\n", idx,
-			 val >> S3C_DPTXFSIZn_DPTxFSize_SHIFT,
-			 val & S3C_DPTXFSIZn_DPTxFStAddr_MASK);
+			 val >> DPTXFSIZn_DPTxFSize_SHIFT,
+			 val & DPTXFSIZn_DPTxFStAddr_MASK);
 	}
 
 	for (idx = 0; idx < 15; idx++) {
 		dev_info(dev,
 			 "ep%d-in: EPCTL=0x%08x, SIZ=0x%08x, DMA=0x%08x\n", idx,
-			 readl(regs + S3C_DIEPCTL(idx)),
-			 readl(regs + S3C_DIEPTSIZ(idx)),
-			 readl(regs + S3C_DIEPDMA(idx)));
+			 readl(regs + DIEPCTL(idx)),
+			 readl(regs + DIEPTSIZ(idx)),
+			 readl(regs + DIEPDMA(idx)));
 
-		val = readl(regs + S3C_DOEPCTL(idx));
+		val = readl(regs + DOEPCTL(idx));
 		dev_info(dev,
 			 "ep%d-out: EPCTL=0x%08x, SIZ=0x%08x, DMA=0x%08x\n",
-			 idx, readl(regs + S3C_DOEPCTL(idx)),
-			 readl(regs + S3C_DOEPTSIZ(idx)),
-			 readl(regs + S3C_DOEPDMA(idx)));
+			 idx, readl(regs + DOEPCTL(idx)),
+			 readl(regs + DOEPTSIZ(idx)),
+			 readl(regs + DOEPDMA(idx)));
 
 	}
 
 	dev_info(dev, "DVBUSDIS=0x%08x, DVBUSPULSE=%08x\n",
-		 readl(regs + S3C_DVBUSDIS), readl(regs + S3C_DVBUSPULSE));
+		 readl(regs + DVBUSDIS), readl(regs + DVBUSPULSE));
 #endif
 }
 
-
 /**
  * state_show - debugfs: show overall driver and device state.
  * @seq: The seq file to write to.
@@ -3005,38 +3186,38 @@ static int state_show(struct seq_file *seq, void *v)
 	int idx;
 
 	seq_printf(seq, "DCFG=0x%08x, DCTL=0x%08x, DSTS=0x%08x\n",
-		 readl(regs + S3C_DCFG),
-		 readl(regs + S3C_DCTL),
-		 readl(regs + S3C_DSTS));
+		 readl(regs + DCFG),
+		 readl(regs + DCTL),
+		 readl(regs + DSTS));
 
 	seq_printf(seq, "DIEPMSK=0x%08x, DOEPMASK=0x%08x\n",
-		   readl(regs + S3C_DIEPMSK), readl(regs + S3C_DOEPMSK));
+		   readl(regs + DIEPMSK), readl(regs + DOEPMSK));
 
 	seq_printf(seq, "GINTMSK=0x%08x, GINTSTS=0x%08x\n",
-		   readl(regs + S3C_GINTMSK),
-		   readl(regs + S3C_GINTSTS));
+		   readl(regs + GINTMSK),
+		   readl(regs + GINTSTS));
 
 	seq_printf(seq, "DAINTMSK=0x%08x, DAINT=0x%08x\n",
-		   readl(regs + S3C_DAINTMSK),
-		   readl(regs + S3C_DAINT));
+		   readl(regs + DAINTMSK),
+		   readl(regs + DAINT));
 
 	seq_printf(seq, "GNPTXSTS=0x%08x, GRXSTSR=%08x\n",
-		   readl(regs + S3C_GNPTXSTS),
-		   readl(regs + S3C_GRXSTSR));
+		   readl(regs + GNPTXSTS),
+		   readl(regs + GRXSTSR));
 
 	seq_printf(seq, "\nEndpoint status:\n");
 
 	for (idx = 0; idx < 15; idx++) {
 		u32 in, out;
 
-		in = readl(regs + S3C_DIEPCTL(idx));
-		out = readl(regs + S3C_DOEPCTL(idx));
+		in = readl(regs + DIEPCTL(idx));
+		out = readl(regs + DOEPCTL(idx));
 
 		seq_printf(seq, "ep%d: DIEPCTL=0x%08x, DOEPCTL=0x%08x",
 			   idx, in, out);
 
-		in = readl(regs + S3C_DIEPTSIZ(idx));
-		out = readl(regs + S3C_DOEPTSIZ(idx));
+		in = readl(regs + DIEPTSIZ(idx));
+		out = readl(regs + DOEPTSIZ(idx));
 
 		seq_printf(seq, ", DIEPTSIZ=0x%08x, DOEPTSIZ=0x%08x",
 			   in, out);
@@ -3067,7 +3248,7 @@ static const struct file_operations state_fops = {
  *
  * Show the FIFO information for the overall fifo and all the
  * periodic transmission FIFOs.
-*/
+ */
 static int fifo_show(struct seq_file *seq, void *v)
 {
 	struct s3c_hsotg *hsotg = seq->private;
@@ -3076,21 +3257,21 @@ static int fifo_show(struct seq_file *seq, void *v)
 	int idx;
 
 	seq_printf(seq, "Non-periodic FIFOs:\n");
-	seq_printf(seq, "RXFIFO: Size %d\n", readl(regs + S3C_GRXFSIZ));
+	seq_printf(seq, "RXFIFO: Size %d\n", readl(regs + GRXFSIZ));
 
-	val = readl(regs + S3C_GNPTXFSIZ);
+	val = readl(regs + GNPTXFSIZ);
 	seq_printf(seq, "NPTXFIFO: Size %d, Start 0x%08x\n",
-		   val >> S3C_GNPTXFSIZ_NPTxFDep_SHIFT,
-		   val & S3C_GNPTXFSIZ_NPTxFStAddr_MASK);
+		   val >> GNPTXFSIZ_NPTxFDep_SHIFT,
+		   val & GNPTXFSIZ_NPTxFStAddr_MASK);
 
 	seq_printf(seq, "\nPeriodic TXFIFOs:\n");
 
 	for (idx = 1; idx <= 15; idx++) {
-		val = readl(regs + S3C_DPTXFSIZn(idx));
+		val = readl(regs + DPTXFSIZn(idx));
 
 		seq_printf(seq, "\tDPTXFIFO%2d: Size %d, Start 0x%08x\n", idx,
-			   val >> S3C_DPTXFSIZn_DPTxFSize_SHIFT,
-			   val & S3C_DPTXFSIZn_DPTxFStAddr_MASK);
+			   val >> DPTXFSIZn_DPTxFSize_SHIFT,
+			   val & DPTXFSIZn_DPTxFStAddr_MASK);
 	}
 
 	return 0;
@@ -3122,7 +3303,7 @@ static const char *decode_direction(int is_in)
  *
  * This debugfs entry shows the state of the given endpoint (one is
  * registered for each available).
-*/
+ */
 static int ep_show(struct seq_file *seq, void *v)
 {
 	struct s3c_hsotg_ep *ep = seq->private;
@@ -3139,20 +3320,20 @@ static int ep_show(struct seq_file *seq, void *v)
 	/* first show the register state */
 
 	seq_printf(seq, "\tDIEPCTL=0x%08x, DOEPCTL=0x%08x\n",
-		   readl(regs + S3C_DIEPCTL(index)),
-		   readl(regs + S3C_DOEPCTL(index)));
+		   readl(regs + DIEPCTL(index)),
+		   readl(regs + DOEPCTL(index)));
 
 	seq_printf(seq, "\tDIEPDMA=0x%08x, DOEPDMA=0x%08x\n",
-		   readl(regs + S3C_DIEPDMA(index)),
-		   readl(regs + S3C_DOEPDMA(index)));
+		   readl(regs + DIEPDMA(index)),
+		   readl(regs + DOEPDMA(index)));
 
 	seq_printf(seq, "\tDIEPINT=0x%08x, DOEPINT=0x%08x\n",
-		   readl(regs + S3C_DIEPINT(index)),
-		   readl(regs + S3C_DOEPINT(index)));
+		   readl(regs + DIEPINT(index)),
+		   readl(regs + DOEPINT(index)));
 
 	seq_printf(seq, "\tDIEPTSIZ=0x%08x, DOEPTSIZ=0x%08x\n",
-		   readl(regs + S3C_DIEPTSIZ(index)),
-		   readl(regs + S3C_DOEPTSIZ(index)));
+		   readl(regs + DIEPTSIZ(index)),
+		   readl(regs + DOEPTSIZ(index)));
 
 	seq_printf(seq, "\n");
 	seq_printf(seq, "mps %d\n", ep->ep.maxpacket);
@@ -3202,7 +3383,7 @@ static const struct file_operations ep_fops = {
  * about the state of the system. The directory name is created
  * with the same name as the device itself, in case we end up
  * with multiple blocks in future systems.
-*/
+ */
 static void __devinit s3c_hsotg_create_debug(struct s3c_hsotg *hsotg)
 {
 	struct dentry *root;
@@ -3231,7 +3412,7 @@ static void __devinit s3c_hsotg_create_debug(struct s3c_hsotg *hsotg)
 
 	/* create one file for each endpoint */
 
-	for (epidx = 0; epidx < S3C_HSOTG_EPS; epidx++) {
+	for (epidx = 0; epidx < hsotg->num_of_eps; epidx++) {
 		struct s3c_hsotg_ep *ep = &hsotg->eps[epidx];
 
 		ep->debugfs = debugfs_create_file(ep->name, 0444,
@@ -3248,12 +3429,12 @@ static void __devinit s3c_hsotg_create_debug(struct s3c_hsotg *hsotg)
  * @hsotg: The driver state
  *
  * Cleanup (remove) the debugfs files for use on module exit.
-*/
+ */
 static void __devexit s3c_hsotg_delete_debug(struct s3c_hsotg *hsotg)
 {
 	unsigned epidx;
 
-	for (epidx = 0; epidx < S3C_HSOTG_EPS; epidx++) {
+	for (epidx = 0; epidx < hsotg->num_of_eps; epidx++) {
 		struct s3c_hsotg_ep *ep = &hsotg->eps[epidx];
 		debugfs_remove(ep->debugfs);
 	}
@@ -3264,48 +3445,39 @@ static void __devexit s3c_hsotg_delete_debug(struct s3c_hsotg *hsotg)
 }
 
 /**
- * s3c_hsotg_gate - set the hardware gate for the block
- * @pdev: The device we bound to
- * @on: On or off.
- *
- * Set the hardware gate setting into the block. If we end up on
- * something other than an S3C64XX, then we might need to change this
- * to using a platform data callback, or some other mechanism.
+ * s3c_hsotg_release - release callback for hsotg device
+ * @dev: Device to for which release is called
  */
-static void s3c_hsotg_gate(struct platform_device *pdev, bool on)
+static void s3c_hsotg_release(struct device *dev)
 {
-	unsigned long flags;
-	u32 others;
-
-	local_irq_save(flags);
-
-	others = __raw_readl(S3C64XX_OTHERS);
-	if (on)
-		others |= S3C64XX_OTHERS_USBMASK;
-	else
-		others &= ~S3C64XX_OTHERS_USBMASK;
-	__raw_writel(others, S3C64XX_OTHERS);
+	struct s3c_hsotg *hsotg = dev_get_drvdata(dev);
 
-	local_irq_restore(flags);
+	kfree(hsotg);
 }
 
-static struct s3c_hsotg_plat s3c_hsotg_default_pdata;
+/**
+ * s3c_hsotg_probe - probe function for hsotg driver
+ * @pdev: The platform information for the driver
+ */
 
 static int __devinit s3c_hsotg_probe(struct platform_device *pdev)
 {
 	struct s3c_hsotg_plat *plat = pdev->dev.platform_data;
 	struct device *dev = &pdev->dev;
+	struct s3c_hsotg_ep *eps;
 	struct s3c_hsotg *hsotg;
 	struct resource *res;
 	int epnum;
 	int ret;
+	int i;
 
-	if (!plat)
-		plat = &s3c_hsotg_default_pdata;
+	plat = pdev->dev.platform_data;
+	if (!plat) {
+		dev_err(&pdev->dev, "no platform data defined\n");
+		return -EINVAL;
+	}
 
-	hsotg = kzalloc(sizeof(struct s3c_hsotg) +
-			sizeof(struct s3c_hsotg_ep) * S3C_HSOTG_EPS,
-			GFP_KERNEL);
+	hsotg = kzalloc(sizeof(struct s3c_hsotg), GFP_KERNEL);
 	if (!hsotg) {
 		dev_err(dev, "cannot get memory\n");
 		return -ENOMEM;
@@ -3371,6 +3543,54 @@ static int __devinit s3c_hsotg_probe(struct platform_device *pdev)
 
 	hsotg->gadget.dev.parent = dev;
 	hsotg->gadget.dev.dma_mask = dev->dma_mask;
+	hsotg->gadget.dev.release = s3c_hsotg_release;
+
+	/* reset the system */
+
+	clk_prepare_enable(hsotg->clk);
+
+	/* regulators */
+
+	for (i = 0; i < ARRAY_SIZE(hsotg->supplies); i++)
+		hsotg->supplies[i].supply = s3c_hsotg_supply_names[i];
+
+	ret = regulator_bulk_get(dev, ARRAY_SIZE(hsotg->supplies),
+				 hsotg->supplies);
+	if (ret) {
+		dev_err(dev, "failed to request supplies: %d\n", ret);
+		goto err_irq;
+	}
+
+	ret = regulator_bulk_enable(ARRAY_SIZE(hsotg->supplies),
+				    hsotg->supplies);
+
+	if (ret) {
+		dev_err(hsotg->dev, "failed to enable supplies: %d\n", ret);
+		goto err_supplies;
+	}
+
+	/* usb phy enable */
+	s3c_hsotg_phy_enable(hsotg);
+
+	s3c_hsotg_corereset(hsotg);
+	s3c_hsotg_init(hsotg);
+	s3c_hsotg_hw_cfg(hsotg);
+
+	/* hsotg->num_of_eps holds number of EPs other than ep0 */
+
+	if (hsotg->num_of_eps == 0) {
+		dev_err(dev, "wrong number of EPs (zero)\n");
+		goto err_supplies;
+	}
+
+	eps = kcalloc(hsotg->num_of_eps + 1, sizeof(struct s3c_hsotg_ep),
+		      GFP_KERNEL);
+	if (!eps) {
+		dev_err(dev, "cannot get memory\n");
+		goto err_supplies;
+	}
+
+	hsotg->eps = eps;
 
 	/* setup endpoint information */
 
@@ -3383,39 +3603,47 @@ static int __devinit s3c_hsotg_probe(struct platform_device *pdev)
 						     GFP_KERNEL);
 	if (!hsotg->ctrl_req) {
 		dev_err(dev, "failed to allocate ctrl req\n");
-		goto err_regs;
+		goto err_ep_mem;
 	}
 
-	/* reset the system */
+	/* initialise the endpoints now the core has been initialised */
+	for (epnum = 0; epnum < hsotg->num_of_eps; epnum++)
+		s3c_hsotg_initep(hsotg, &hsotg->eps[epnum], epnum);
 
-	clk_enable(hsotg->clk);
+	/* disable power and clock */
 
-	s3c_hsotg_gate(pdev, true);
+	ret = regulator_bulk_disable(ARRAY_SIZE(hsotg->supplies),
+				    hsotg->supplies);
+	if (ret) {
+		dev_err(hsotg->dev, "failed to disable supplies: %d\n", ret);
+		goto err_ep_mem;
+	}
 
-	s3c_hsotg_otgreset(hsotg);
-	s3c_hsotg_corereset(hsotg);
-	s3c_hsotg_init(hsotg);
+	s3c_hsotg_phy_disable(hsotg);
 
-	/* initialise the endpoints now the core has been initialised */
-	for (epnum = 0; epnum < S3C_HSOTG_EPS; epnum++)
-		s3c_hsotg_initep(hsotg, &hsotg->eps[epnum], epnum);
+	ret = device_add(&hsotg->gadget.dev);
+	if (ret) {
+		put_device(&hsotg->gadget.dev);
+		goto err_ep_mem;
+	}
 
 	ret = usb_add_gadget_udc(&pdev->dev, &hsotg->gadget);
 	if (ret)
-		goto err_add_udc;
+		goto err_ep_mem;
 
 	s3c_hsotg_create_debug(hsotg);
 
 	s3c_hsotg_dump(hsotg);
 
-	our_hsotg = hsotg;
 	return 0;
 
-err_add_udc:
-	s3c_hsotg_gate(pdev, false);
-	clk_disable(hsotg->clk);
-	clk_put(hsotg->clk);
-
+err_ep_mem:
+	kfree(eps);
+err_supplies:
+	s3c_hsotg_phy_disable(hsotg);
+	regulator_bulk_free(ARRAY_SIZE(hsotg->supplies), hsotg->supplies);
+err_irq:
+	free_irq(hsotg->irq, hsotg);
 err_regs:
 	iounmap(hsotg->regs);
 
@@ -3423,12 +3651,17 @@ err_regs_res:
 	release_resource(hsotg->regs_res);
 	kfree(hsotg->regs_res);
 err_clk:
+	clk_disable_unprepare(hsotg->clk);
 	clk_put(hsotg->clk);
 err_mem:
 	kfree(hsotg);
 	return ret;
 }
 
+/**
+ * s3c_hsotg_remove - remove function for hsotg driver
+ * @pdev: The platform information for the driver
+ */
 static int __devexit s3c_hsotg_remove(struct platform_device *pdev)
 {
 	struct s3c_hsotg *hsotg = platform_get_drvdata(pdev);
@@ -3437,7 +3670,10 @@ static int __devexit s3c_hsotg_remove(struct platform_device *pdev)
 
 	s3c_hsotg_delete_debug(hsotg);
 
-	usb_gadget_unregister_driver(hsotg->driver);
+	if (hsotg->driver) {
+		/* should have been done already by driver model core */
+		usb_gadget_unregister_driver(hsotg->driver);
+	}
 
 	free_irq(hsotg->irq, hsotg);
 	iounmap(hsotg->regs);
@@ -3445,12 +3681,13 @@ static int __devexit s3c_hsotg_remove(struct platform_device *pdev)
 	release_resource(hsotg->regs_res);
 	kfree(hsotg->regs_res);
 
-	s3c_hsotg_gate(pdev, false);
+	s3c_hsotg_phy_disable(hsotg);
+	regulator_bulk_free(ARRAY_SIZE(hsotg->supplies), hsotg->supplies);
 
-	clk_disable(hsotg->clk);
+	clk_disable_unprepare(hsotg->clk);
 	clk_put(hsotg->clk);
 
-	kfree(hsotg);
+	device_unregister(&hsotg->gadget.dev);
 	return 0;
 }
 
diff --git a/drivers/usb/gadget/s3c-hsotg.h b/drivers/usb/gadget/s3c-hsotg.h
new file mode 100644
index 00000000000..d650b129583
--- /dev/null
+++ b/drivers/usb/gadget/s3c-hsotg.h
@@ -0,0 +1,377 @@
+/* drivers/usb/gadget/s3c-hsotg.h
+ *
+ * Copyright 2008 Openmoko, Inc.
+ * Copyright 2008 Simtec Electronics
+ *      http://armlinux.simtec.co.uk/
+ *      Ben Dooks <ben@simtec.co.uk>
+ *
+ * USB2.0 Highspeed/OtG Synopsis DWC2 device block registers
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+*/
+
+#ifndef __REGS_USB_HSOTG_H
+#define __REGS_USB_HSOTG_H __FILE__
+
+#define HSOTG_REG(x) (x)
+
+#define GOTGCTL				HSOTG_REG(0x000)
+#define GOTGCTL_BSESVLD			(1 << 19)
+#define GOTGCTL_ASESVLD			(1 << 18)
+#define GOTGCTL_DBNC_SHORT			(1 << 17)
+#define GOTGCTL_CONID_B			(1 << 16)
+#define GOTGCTL_DEVHNPEN			(1 << 11)
+#define GOTGCTL_HSSETHNPEN			(1 << 10)
+#define GOTGCTL_HNPREQ				(1 << 9)
+#define GOTGCTL_HSTNEGSCS			(1 << 8)
+#define GOTGCTL_SESREQ				(1 << 1)
+#define GOTGCTL_SESREQSCS			(1 << 0)
+
+#define GOTGINT				HSOTG_REG(0x004)
+#define GOTGINT_DbnceDone			(1 << 19)
+#define GOTGINT_ADevTOUTChg			(1 << 18)
+#define GOTGINT_HstNegDet			(1 << 17)
+#define GOTGINT_HstnegSucStsChng		(1 << 9)
+#define GOTGINT_SesReqSucStsChng		(1 << 8)
+#define GOTGINT_SesEndDet			(1 << 2)
+
+#define GAHBCFG				HSOTG_REG(0x008)
+#define GAHBCFG_PTxFEmpLvl			(1 << 8)
+#define GAHBCFG_NPTxFEmpLvl			(1 << 7)
+#define GAHBCFG_DMAEn				(1 << 5)
+#define GAHBCFG_HBstLen_MASK			(0xf << 1)
+#define GAHBCFG_HBstLen_SHIFT			(1)
+#define GAHBCFG_HBstLen_Single			(0x0 << 1)
+#define GAHBCFG_HBstLen_Incr			(0x1 << 1)
+#define GAHBCFG_HBstLen_Incr4			(0x3 << 1)
+#define GAHBCFG_HBstLen_Incr8			(0x5 << 1)
+#define GAHBCFG_HBstLen_Incr16			(0x7 << 1)
+#define GAHBCFG_GlblIntrEn			(1 << 0)
+
+#define GUSBCFG				HSOTG_REG(0x00C)
+#define GUSBCFG_PHYLPClkSel			(1 << 15)
+#define GUSBCFG_HNPCap				(1 << 9)
+#define GUSBCFG_SRPCap				(1 << 8)
+#define GUSBCFG_PHYIf16			(1 << 3)
+#define GUSBCFG_TOutCal_MASK			(0x7 << 0)
+#define GUSBCFG_TOutCal_SHIFT			(0)
+#define GUSBCFG_TOutCal_LIMIT			(0x7)
+#define GUSBCFG_TOutCal(_x)			((_x) << 0)
+
+#define GRSTCTL				HSOTG_REG(0x010)
+
+#define GRSTCTL_AHBIdle			(1 << 31)
+#define GRSTCTL_DMAReq				(1 << 30)
+#define GRSTCTL_TxFNum_MASK			(0x1f << 6)
+#define GRSTCTL_TxFNum_SHIFT			(6)
+#define GRSTCTL_TxFNum_LIMIT			(0x1f)
+#define GRSTCTL_TxFNum(_x)			((_x) << 6)
+#define GRSTCTL_TxFFlsh			(1 << 5)
+#define GRSTCTL_RxFFlsh			(1 << 4)
+#define GRSTCTL_INTknQFlsh			(1 << 3)
+#define GRSTCTL_FrmCntrRst			(1 << 2)
+#define GRSTCTL_HSftRst			(1 << 1)
+#define GRSTCTL_CSftRst			(1 << 0)
+
+#define GINTSTS				HSOTG_REG(0x014)
+#define GINTMSK				HSOTG_REG(0x018)
+
+#define GINTSTS_WkUpInt			(1 << 31)
+#define GINTSTS_SessReqInt			(1 << 30)
+#define GINTSTS_DisconnInt			(1 << 29)
+#define GINTSTS_ConIDStsChng			(1 << 28)
+#define GINTSTS_PTxFEmp			(1 << 26)
+#define GINTSTS_HChInt				(1 << 25)
+#define GINTSTS_PrtInt				(1 << 24)
+#define GINTSTS_FetSusp			(1 << 22)
+#define GINTSTS_incompIP			(1 << 21)
+#define GINTSTS_IncomplSOIN			(1 << 20)
+#define GINTSTS_OEPInt				(1 << 19)
+#define GINTSTS_IEPInt				(1 << 18)
+#define GINTSTS_EPMis				(1 << 17)
+#define GINTSTS_EOPF				(1 << 15)
+#define GINTSTS_ISOutDrop			(1 << 14)
+#define GINTSTS_EnumDone			(1 << 13)
+#define GINTSTS_USBRst				(1 << 12)
+#define GINTSTS_USBSusp			(1 << 11)
+#define GINTSTS_ErlySusp			(1 << 10)
+#define GINTSTS_GOUTNakEff			(1 << 7)
+#define GINTSTS_GINNakEff			(1 << 6)
+#define GINTSTS_NPTxFEmp			(1 << 5)
+#define GINTSTS_RxFLvl				(1 << 4)
+#define GINTSTS_SOF				(1 << 3)
+#define GINTSTS_OTGInt				(1 << 2)
+#define GINTSTS_ModeMis			(1 << 1)
+#define GINTSTS_CurMod_Host			(1 << 0)
+
+#define GRXSTSR				HSOTG_REG(0x01C)
+#define GRXSTSP				HSOTG_REG(0x020)
+
+#define GRXSTS_FN_MASK				(0x7f << 25)
+#define GRXSTS_FN_SHIFT			(25)
+
+#define GRXSTS_PktSts_MASK			(0xf << 17)
+#define GRXSTS_PktSts_SHIFT			(17)
+#define GRXSTS_PktSts_GlobalOutNAK		(0x1 << 17)
+#define GRXSTS_PktSts_OutRX			(0x2 << 17)
+#define GRXSTS_PktSts_OutDone			(0x3 << 17)
+#define GRXSTS_PktSts_SetupDone		(0x4 << 17)
+#define GRXSTS_PktSts_SetupRX			(0x6 << 17)
+
+#define GRXSTS_DPID_MASK			(0x3 << 15)
+#define GRXSTS_DPID_SHIFT			(15)
+#define GRXSTS_ByteCnt_MASK			(0x7ff << 4)
+#define GRXSTS_ByteCnt_SHIFT			(4)
+#define GRXSTS_EPNum_MASK			(0xf << 0)
+#define GRXSTS_EPNum_SHIFT			(0)
+
+#define GRXFSIZ				HSOTG_REG(0x024)
+
+#define GNPTXFSIZ				HSOTG_REG(0x028)
+
+#define GNPTXFSIZ_NPTxFDep_MASK		(0xffff << 16)
+#define GNPTXFSIZ_NPTxFDep_SHIFT		(16)
+#define GNPTXFSIZ_NPTxFDep_LIMIT		(0xffff)
+#define GNPTXFSIZ_NPTxFDep(_x)			((_x) << 16)
+#define GNPTXFSIZ_NPTxFStAddr_MASK		(0xffff << 0)
+#define GNPTXFSIZ_NPTxFStAddr_SHIFT		(0)
+#define GNPTXFSIZ_NPTxFStAddr_LIMIT		(0xffff)
+#define GNPTXFSIZ_NPTxFStAddr(_x)		((_x) << 0)
+
+#define GNPTXSTS				HSOTG_REG(0x02C)
+
+#define GNPTXSTS_NPtxQTop_MASK			(0x7f << 24)
+#define GNPTXSTS_NPtxQTop_SHIFT		(24)
+
+#define GNPTXSTS_NPTxQSpcAvail_MASK		(0xff << 16)
+#define GNPTXSTS_NPTxQSpcAvail_SHIFT		(16)
+#define GNPTXSTS_NPTxQSpcAvail_GET(_v)		(((_v) >> 16) & 0xff)
+
+#define GNPTXSTS_NPTxFSpcAvail_MASK		(0xffff << 0)
+#define GNPTXSTS_NPTxFSpcAvail_SHIFT		(0)
+#define GNPTXSTS_NPTxFSpcAvail_GET(_v)		(((_v) >> 0) & 0xffff)
+
+
+#define HPTXFSIZ				HSOTG_REG(0x100)
+
+#define DPTXFSIZn(_a)		HSOTG_REG(0x104 + (((_a) - 1) * 4))
+
+#define DPTXFSIZn_DPTxFSize_MASK		(0xffff << 16)
+#define DPTXFSIZn_DPTxFSize_SHIFT		(16)
+#define DPTXFSIZn_DPTxFSize_GET(_v)		(((_v) >> 16) & 0xffff)
+#define DPTXFSIZn_DPTxFSize_LIMIT		(0xffff)
+#define DPTXFSIZn_DPTxFSize(_x)		((_x) << 16)
+
+#define DPTXFSIZn_DPTxFStAddr_MASK		(0xffff << 0)
+#define DPTXFSIZn_DPTxFStAddr_SHIFT		(0)
+
+/* Device mode registers */
+#define DCFG					HSOTG_REG(0x800)
+
+#define DCFG_EPMisCnt_MASK			(0x1f << 18)
+#define DCFG_EPMisCnt_SHIFT			(18)
+#define DCFG_EPMisCnt_LIMIT			(0x1f)
+#define DCFG_EPMisCnt(_x)			((_x) << 18)
+
+#define DCFG_PerFrInt_MASK			(0x3 << 11)
+#define DCFG_PerFrInt_SHIFT			(11)
+#define DCFG_PerFrInt_LIMIT			(0x3)
+#define DCFG_PerFrInt(_x)			((_x) << 11)
+
+#define DCFG_DevAddr_MASK			(0x7f << 4)
+#define DCFG_DevAddr_SHIFT			(4)
+#define DCFG_DevAddr_LIMIT			(0x7f)
+#define DCFG_DevAddr(_x)			((_x) << 4)
+
+#define DCFG_NZStsOUTHShk			(1 << 2)
+
+#define DCFG_DevSpd_MASK			(0x3 << 0)
+#define DCFG_DevSpd_SHIFT			(0)
+#define DCFG_DevSpd_HS				(0x0 << 0)
+#define DCFG_DevSpd_FS				(0x1 << 0)
+#define DCFG_DevSpd_LS				(0x2 << 0)
+#define DCFG_DevSpd_FS48			(0x3 << 0)
+
+#define DCTL					HSOTG_REG(0x804)
+
+#define DCTL_PWROnPrgDone			(1 << 11)
+#define DCTL_CGOUTNak				(1 << 10)
+#define DCTL_SGOUTNak				(1 << 9)
+#define DCTL_CGNPInNAK				(1 << 8)
+#define DCTL_SGNPInNAK				(1 << 7)
+#define DCTL_TstCtl_MASK			(0x7 << 4)
+#define DCTL_TstCtl_SHIFT			(4)
+#define DCTL_GOUTNakSts			(1 << 3)
+#define DCTL_GNPINNakSts			(1 << 2)
+#define DCTL_SftDiscon				(1 << 1)
+#define DCTL_RmtWkUpSig			(1 << 0)
+
+#define DSTS					HSOTG_REG(0x808)
+
+#define DSTS_SOFFN_MASK			(0x3fff << 8)
+#define DSTS_SOFFN_SHIFT			(8)
+#define DSTS_SOFFN_LIMIT			(0x3fff)
+#define DSTS_SOFFN(_x)				((_x) << 8)
+#define DSTS_ErraticErr			(1 << 3)
+#define DSTS_EnumSpd_MASK			(0x3 << 1)
+#define DSTS_EnumSpd_SHIFT			(1)
+#define DSTS_EnumSpd_HS			(0x0 << 1)
+#define DSTS_EnumSpd_FS			(0x1 << 1)
+#define DSTS_EnumSpd_LS			(0x2 << 1)
+#define DSTS_EnumSpd_FS48			(0x3 << 1)
+
+#define DSTS_SuspSts				(1 << 0)
+
+#define DIEPMSK				HSOTG_REG(0x810)
+
+#define DIEPMSK_TxFIFOEmpty			(1 << 7)
+#define DIEPMSK_INEPNakEffMsk			(1 << 6)
+#define DIEPMSK_INTknEPMisMsk			(1 << 5)
+#define DIEPMSK_INTknTXFEmpMsk			(1 << 4)
+#define DIEPMSK_TimeOUTMsk			(1 << 3)
+#define DIEPMSK_AHBErrMsk			(1 << 2)
+#define DIEPMSK_EPDisbldMsk			(1 << 1)
+#define DIEPMSK_XferComplMsk			(1 << 0)
+
+#define DOEPMSK				HSOTG_REG(0x814)
+
+#define DOEPMSK_Back2BackSetup			(1 << 6)
+#define DOEPMSK_OUTTknEPdisMsk			(1 << 4)
+#define DOEPMSK_SetupMsk			(1 << 3)
+#define DOEPMSK_AHBErrMsk			(1 << 2)
+#define DOEPMSK_EPDisbldMsk			(1 << 1)
+#define DOEPMSK_XferComplMsk			(1 << 0)
+
+#define DAINT					HSOTG_REG(0x818)
+#define DAINTMSK				HSOTG_REG(0x81C)
+
+#define DAINT_OutEP_SHIFT			(16)
+#define DAINT_OutEP(x)				(1 << ((x) + 16))
+#define DAINT_InEP(x)				(1 << (x))
+
+#define DTKNQR1				HSOTG_REG(0x820)
+#define DTKNQR2				HSOTG_REG(0x824)
+#define DTKNQR3				HSOTG_REG(0x830)
+#define DTKNQR4				HSOTG_REG(0x834)
+
+#define DVBUSDIS				HSOTG_REG(0x828)
+#define DVBUSPULSE				HSOTG_REG(0x82C)
+
+#define DIEPCTL0				HSOTG_REG(0x900)
+#define DOEPCTL0				HSOTG_REG(0xB00)
+#define DIEPCTL(_a)			HSOTG_REG(0x900 + ((_a) * 0x20))
+#define DOEPCTL(_a)			HSOTG_REG(0xB00 + ((_a) * 0x20))
+
+/* EP0 specialness:
+ * bits[29..28] - reserved (no SetD0PID, SetD1PID)
+ * bits[25..22] - should always be zero, this isn't a periodic endpoint
+ * bits[10..0] - MPS setting differenct for EP0
+ */
+#define D0EPCTL_MPS_MASK			(0x3 << 0)
+#define D0EPCTL_MPS_SHIFT			(0)
+#define D0EPCTL_MPS_64				(0x0 << 0)
+#define D0EPCTL_MPS_32				(0x1 << 0)
+#define D0EPCTL_MPS_16				(0x2 << 0)
+#define D0EPCTL_MPS_8				(0x3 << 0)
+
+#define DxEPCTL_EPEna				(1 << 31)
+#define DxEPCTL_EPDis				(1 << 30)
+#define DxEPCTL_SetD1PID			(1 << 29)
+#define DxEPCTL_SetOddFr			(1 << 29)
+#define DxEPCTL_SetD0PID			(1 << 28)
+#define DxEPCTL_SetEvenFr			(1 << 28)
+#define DxEPCTL_SNAK				(1 << 27)
+#define DxEPCTL_CNAK				(1 << 26)
+#define DxEPCTL_TxFNum_MASK			(0xf << 22)
+#define DxEPCTL_TxFNum_SHIFT			(22)
+#define DxEPCTL_TxFNum_LIMIT			(0xf)
+#define DxEPCTL_TxFNum(_x)			((_x) << 22)
+
+#define DxEPCTL_Stall				(1 << 21)
+#define DxEPCTL_Snp				(1 << 20)
+#define DxEPCTL_EPType_MASK			(0x3 << 18)
+#define DxEPCTL_EPType_SHIFT			(18)
+#define DxEPCTL_EPType_Control			(0x0 << 18)
+#define DxEPCTL_EPType_Iso			(0x1 << 18)
+#define DxEPCTL_EPType_Bulk			(0x2 << 18)
+#define DxEPCTL_EPType_Intterupt		(0x3 << 18)
+
+#define DxEPCTL_NAKsts				(1 << 17)
+#define DxEPCTL_DPID				(1 << 16)
+#define DxEPCTL_EOFrNum			(1 << 16)
+#define DxEPCTL_USBActEp			(1 << 15)
+#define DxEPCTL_NextEp_MASK			(0xf << 11)
+#define DxEPCTL_NextEp_SHIFT			(11)
+#define DxEPCTL_NextEp_LIMIT			(0xf)
+#define DxEPCTL_NextEp(_x)			((_x) << 11)
+
+#define DxEPCTL_MPS_MASK			(0x7ff << 0)
+#define DxEPCTL_MPS_SHIFT			(0)
+#define DxEPCTL_MPS_LIMIT			(0x7ff)
+#define DxEPCTL_MPS(_x)			((_x) << 0)
+
+#define DIEPINT(_a)			HSOTG_REG(0x908 + ((_a) * 0x20))
+#define DOEPINT(_a)			HSOTG_REG(0xB08 + ((_a) * 0x20))
+
+#define DxEPINT_INEPNakEff			(1 << 6)
+#define DxEPINT_Back2BackSetup			(1 << 6)
+#define DxEPINT_INTknEPMis			(1 << 5)
+#define DxEPINT_INTknTXFEmp			(1 << 4)
+#define DxEPINT_OUTTknEPdis			(1 << 4)
+#define DxEPINT_Timeout			(1 << 3)
+#define DxEPINT_Setup				(1 << 3)
+#define DxEPINT_AHBErr				(1 << 2)
+#define DxEPINT_EPDisbld			(1 << 1)
+#define DxEPINT_XferCompl			(1 << 0)
+
+#define DIEPTSIZ0				HSOTG_REG(0x910)
+
+#define DIEPTSIZ0_PktCnt_MASK			(0x3 << 19)
+#define DIEPTSIZ0_PktCnt_SHIFT			(19)
+#define DIEPTSIZ0_PktCnt_LIMIT			(0x3)
+#define DIEPTSIZ0_PktCnt(_x)			((_x) << 19)
+
+#define DIEPTSIZ0_XferSize_MASK		(0x7f << 0)
+#define DIEPTSIZ0_XferSize_SHIFT		(0)
+#define DIEPTSIZ0_XferSize_LIMIT		(0x7f)
+#define DIEPTSIZ0_XferSize(_x)			((_x) << 0)
+
+#define DOEPTSIZ0				HSOTG_REG(0xB10)
+#define DOEPTSIZ0_SUPCnt_MASK			(0x3 << 29)
+#define DOEPTSIZ0_SUPCnt_SHIFT			(29)
+#define DOEPTSIZ0_SUPCnt_LIMIT			(0x3)
+#define DOEPTSIZ0_SUPCnt(_x)			((_x) << 29)
+
+#define DOEPTSIZ0_PktCnt			(1 << 19)
+#define DOEPTSIZ0_XferSize_MASK		(0x7f << 0)
+#define DOEPTSIZ0_XferSize_SHIFT		(0)
+
+#define DIEPTSIZ(_a)			HSOTG_REG(0x910 + ((_a) * 0x20))
+#define DOEPTSIZ(_a)			HSOTG_REG(0xB10 + ((_a) * 0x20))
+
+#define DxEPTSIZ_MC_MASK			(0x3 << 29)
+#define DxEPTSIZ_MC_SHIFT			(29)
+#define DxEPTSIZ_MC_LIMIT			(0x3)
+#define DxEPTSIZ_MC(_x)			((_x) << 29)
+
+#define DxEPTSIZ_PktCnt_MASK			(0x3ff << 19)
+#define DxEPTSIZ_PktCnt_SHIFT			(19)
+#define DxEPTSIZ_PktCnt_GET(_v)		(((_v) >> 19) & 0x3ff)
+#define DxEPTSIZ_PktCnt_LIMIT			(0x3ff)
+#define DxEPTSIZ_PktCnt(_x)			((_x) << 19)
+
+#define DxEPTSIZ_XferSize_MASK			(0x7ffff << 0)
+#define DxEPTSIZ_XferSize_SHIFT		(0)
+#define DxEPTSIZ_XferSize_GET(_v)		(((_v) >> 0) & 0x7ffff)
+#define DxEPTSIZ_XferSize_LIMIT		(0x7ffff)
+#define DxEPTSIZ_XferSize(_x)			((_x) << 0)
+
+#define DIEPDMA(_a)			HSOTG_REG(0x914 + ((_a) * 0x20))
+#define DOEPDMA(_a)			HSOTG_REG(0xB14 + ((_a) * 0x20))
+#define DTXFSTS(_a)			HSOTG_REG(0x918 + ((_a) * 0x20))
+
+#define EPFIFO(_a)			HSOTG_REG(0x1000 + ((_a) * 0x1000))
+
+#endif /* __REGS_USB_HSOTG_H */
diff --git a/drivers/usb/gadget/s3c-hsudc.c b/drivers/usb/gadget/s3c-hsudc.c
index cef9b82ff91..36c6836eeb0 100644
--- a/drivers/usb/gadget/s3c-hsudc.c
+++ b/drivers/usb/gadget/s3c-hsudc.c
@@ -110,7 +110,6 @@ struct s3c_hsudc_ep {
 	struct usb_ep ep;
 	char name[20];
 	struct s3c_hsudc *dev;
-	const struct usb_endpoint_descriptor *desc;
 	struct list_head queue;
 	u8 stopped;
 	u8 wedge;
@@ -761,7 +760,7 @@ static int s3c_hsudc_ep_enable(struct usb_ep *_ep,
 	u32 ecr = 0;
 
 	hsep = our_ep(_ep);
-	if (!_ep || !desc || hsep->desc || _ep->name == ep0name
+	if (!_ep || !desc || hsep->ep.desc || _ep->name == ep0name
 		|| desc->bDescriptorType != USB_DT_ENDPOINT
 		|| hsep->bEndpointAddress != desc->bEndpointAddress
 		|| ep_maxpacket(hsep) < usb_endpoint_maxp(desc))
@@ -783,7 +782,7 @@ static int s3c_hsudc_ep_enable(struct usb_ep *_ep,
 	writel(ecr, hsudc->regs + S3C_ECR);
 
 	hsep->stopped = hsep->wedge = 0;
-	hsep->desc = desc;
+	hsep->ep.desc = desc;
 	hsep->ep.maxpacket = usb_endpoint_maxp(desc);
 
 	s3c_hsudc_set_halt(_ep, 0);
@@ -806,7 +805,7 @@ static int s3c_hsudc_ep_disable(struct usb_ep *_ep)
 	struct s3c_hsudc *hsudc = hsep->dev;
 	unsigned long flags;
 
-	if (!_ep || !hsep->desc)
+	if (!_ep || !hsep->ep.desc)
 		return -EINVAL;
 
 	spin_lock_irqsave(&hsudc->lock, flags);
@@ -816,7 +815,6 @@ static int s3c_hsudc_ep_disable(struct usb_ep *_ep)
 
 	s3c_hsudc_nuke_ep(hsep, -ESHUTDOWN);
 
-	hsep->desc = 0;
 	hsep->ep.desc = NULL;
 	hsep->stopped = 1;
 
@@ -1006,7 +1004,6 @@ static void s3c_hsudc_initep(struct s3c_hsudc *hsudc,
 	hsep->ep.maxpacket = epnum ? 512 : 64;
 	hsep->ep.ops = &s3c_hsudc_ep_ops;
 	hsep->fifo = hsudc->regs + S3C_BR(epnum);
-	hsep->desc = 0;
 	hsep->ep.desc = NULL;
 	hsep->stopped = 0;
 	hsep->wedge = 0;
diff --git a/drivers/usb/gadget/s3c2410_udc.c b/drivers/usb/gadget/s3c2410_udc.c
index 195524cde6c..3de71d37d75 100644
--- a/drivers/usb/gadget/s3c2410_udc.c
+++ b/drivers/usb/gadget/s3c2410_udc.c
@@ -1062,7 +1062,7 @@ static int s3c2410_udc_ep_enable(struct usb_ep *_ep,
 
 	ep = to_s3c2410_ep(_ep);
 
-	if (!_ep || !desc || ep->desc
+	if (!_ep || !desc || ep->ep.desc
 			|| _ep->name == ep0name
 			|| desc->bDescriptorType != USB_DT_ENDPOINT)
 		return -EINVAL;
@@ -1075,7 +1075,7 @@ static int s3c2410_udc_ep_enable(struct usb_ep *_ep,
 
 	local_irq_save (flags);
 	_ep->maxpacket = max & 0x7ff;
-	ep->desc = desc;
+	ep->ep.desc = desc;
 	ep->halted = 0;
 	ep->bEndpointAddress = desc->bEndpointAddress;
 
@@ -1136,7 +1136,7 @@ static int s3c2410_udc_ep_disable(struct usb_ep *_ep)
 	unsigned long flags;
 	u32 int_en_reg;
 
-	if (!_ep || !ep->desc) {
+	if (!_ep || !ep->ep.desc) {
 		dprintk(DEBUG_NORMAL, "%s not enabled\n",
 			_ep ? ep->ep.name : NULL);
 		return -EINVAL;
@@ -1146,7 +1146,6 @@ static int s3c2410_udc_ep_disable(struct usb_ep *_ep)
 
 	dprintk(DEBUG_NORMAL, "ep_disable: %s\n", _ep->name);
 
-	ep->desc = NULL;
 	ep->ep.desc = NULL;
 	ep->halted = 1;
 
@@ -1195,7 +1194,7 @@ s3c2410_udc_free_request(struct usb_ep *_ep, struct usb_request *_req)
 
 	dprintk(DEBUG_VERBOSE, "%s(%p,%p)\n", __func__, _ep, _req);
 
-	if (!ep || !_req || (!ep->desc && _ep->name != ep0name))
+	if (!ep || !_req || (!ep->ep.desc && _ep->name != ep0name))
 		return;
 
 	WARN_ON (!list_empty (&req->queue));
@@ -1215,7 +1214,7 @@ static int s3c2410_udc_queue(struct usb_ep *_ep, struct usb_request *_req,
 	int			fifo_count = 0;
 	unsigned long		flags;
 
-	if (unlikely (!_ep || (!ep->desc && ep->ep.name != ep0name))) {
+	if (unlikely(!_ep || (!ep->ep.desc && ep->ep.name != ep0name))) {
 		dprintk(DEBUG_NORMAL, "%s: invalid args\n", __func__);
 		return -EINVAL;
 	}
@@ -1363,7 +1362,7 @@ static int s3c2410_udc_set_halt(struct usb_ep *_ep, int value)
 	unsigned long		flags;
 	u32			idx;
 
-	if (unlikely (!_ep || (!ep->desc && ep->ep.name != ep0name))) {
+	if (unlikely(!_ep || (!ep->ep.desc && ep->ep.name != ep0name))) {
 		dprintk(DEBUG_NORMAL, "%s: inval 2\n", __func__);
 		return -EINVAL;
 	}
@@ -1629,7 +1628,6 @@ static void s3c2410_udc_reinit(struct s3c2410_udc *dev)
 			list_add_tail (&ep->ep.ep_list, &dev->gadget.ep_list);
 
 		ep->dev = dev;
-		ep->desc = NULL;
 		ep->ep.desc = NULL;
 		ep->halted = 0;
 		INIT_LIST_HEAD (&ep->queue);
diff --git a/drivers/usb/gadget/s3c2410_udc.h b/drivers/usb/gadget/s3c2410_udc.h
index 1653bae08b8..3e80fd5c820 100644
--- a/drivers/usb/gadget/s3c2410_udc.h
+++ b/drivers/usb/gadget/s3c2410_udc.h
@@ -19,7 +19,6 @@ struct s3c2410_ep {
 	unsigned long			last_io;	/* jiffies timestamp */
 	struct usb_gadget		*gadget;
 	struct s3c2410_udc		*dev;
-	const struct usb_endpoint_descriptor *desc;
 	struct usb_ep			ep;
 	u8				num;
 
diff --git a/drivers/usb/gadget/zero.c b/drivers/usb/gadget/zero.c
index 31d34832907..12ad516ada7 100644
--- a/drivers/usb/gadget/zero.c
+++ b/drivers/usb/gadget/zero.c
@@ -72,7 +72,7 @@
 
 static const char longname[] = "Gadget Zero";
 
-unsigned buflen = 4096;
+unsigned buflen = 4096;		/* only used for bulk endpoints */
 module_param(buflen, uint, 0);
 
 /*
@@ -170,14 +170,17 @@ static struct usb_gadget_strings *dev_strings[] = {
 
 /*-------------------------------------------------------------------------*/
 
-struct usb_request *alloc_ep_req(struct usb_ep *ep)
+struct usb_request *alloc_ep_req(struct usb_ep *ep, int len)
 {
 	struct usb_request	*req;
 
 	req = usb_ep_alloc_request(ep, GFP_ATOMIC);
 	if (req) {
-		req->length = buflen;
-		req->buf = kmalloc(buflen, GFP_ATOMIC);
+		if (len)
+			req->length = len;
+		else
+			req->length = buflen;
+		req->buf = kmalloc(req->length, GFP_ATOMIC);
 		if (!req->buf) {
 			usb_ep_free_request(ep, req);
 			req = NULL;
@@ -206,10 +209,15 @@ static void disable_ep(struct usb_composite_dev *cdev, struct usb_ep *ep)
 }
 
 void disable_endpoints(struct usb_composite_dev *cdev,
-		struct usb_ep *in, struct usb_ep *out)
+		struct usb_ep *in, struct usb_ep *out,
+		struct usb_ep *iso_in, struct usb_ep *iso_out)
 {
 	disable_ep(cdev, in);
 	disable_ep(cdev, out);
+	if (iso_in)
+		disable_ep(cdev, iso_in);
+	if (iso_out)
+		disable_ep(cdev, iso_out);
 }
 
 /*-------------------------------------------------------------------------*/
@@ -311,7 +319,6 @@ static int __init zero_bind(struct usb_composite_dev *cdev)
 		device_desc.bcdDevice = cpu_to_le16(0x9999);
 	}
 
-
 	INFO(cdev, "%s, version: " DRIVER_VERSION "\n", longname);
 
 	snprintf(manufacturer, sizeof manufacturer, "%s %s with %s",