usb: gadget: Gadget directory cleanup - group UDC drivers

The drivers/usb/gadget directory contains many files.
Files which are related can be distributed into separate directories.
This patch moves the UDC drivers into a separate directory.

Signed-off-by: Andrzej Pietrasiewicz <andrzej.p@samsung.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>

1 files changed, 0 insertions, 2070 deletions

diff --git a/drivers/usb/gadget/mv_u3d_core.c b/drivers/usb/gadget/mv_u3d_core.c
deleted file mode 100644
index 16248711c152..000000000000
--- a/drivers/usb/gadget/mv_u3d_core.c
+++ /dev/null
@@ -1,2070 +0,0 @@
-/*
- * Copyright (C) 2011 Marvell International Ltd. All rights reserved.
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms and conditions of the GNU General Public License,
- * version 2, as published by the Free Software Foundation.
- */
-
-#include <linux/module.h>
-#include <linux/dma-mapping.h>
-#include <linux/dmapool.h>
-#include <linux/kernel.h>
-#include <linux/delay.h>
-#include <linux/ioport.h>
-#include <linux/sched.h>
-#include <linux/slab.h>
-#include <linux/errno.h>
-#include <linux/timer.h>
-#include <linux/list.h>
-#include <linux/notifier.h>
-#include <linux/interrupt.h>
-#include <linux/moduleparam.h>
-#include <linux/device.h>
-#include <linux/usb/ch9.h>
-#include <linux/usb/gadget.h>
-#include <linux/pm.h>
-#include <linux/io.h>
-#include <linux/irq.h>
-#include <linux/platform_device.h>
-#include <linux/platform_data/mv_usb.h>
-#include <linux/clk.h>
-
-#include "mv_u3d.h"
-
-#define DRIVER_DESC		"Marvell PXA USB3.0 Device Controller driver"
-
-static const char driver_name[] = "mv_u3d";
-static const char driver_desc[] = DRIVER_DESC;
-
-static void mv_u3d_nuke(struct mv_u3d_ep *ep, int status);
-static void mv_u3d_stop_activity(struct mv_u3d *u3d,
-			struct usb_gadget_driver *driver);
-
-/* for endpoint 0 operations */
-static const struct usb_endpoint_descriptor mv_u3d_ep0_desc = {
-	.bLength =		USB_DT_ENDPOINT_SIZE,
-	.bDescriptorType =	USB_DT_ENDPOINT,
-	.bEndpointAddress =	0,
-	.bmAttributes =		USB_ENDPOINT_XFER_CONTROL,
-	.wMaxPacketSize =	MV_U3D_EP0_MAX_PKT_SIZE,
-};
-
-static void mv_u3d_ep0_reset(struct mv_u3d *u3d)
-{
-	struct mv_u3d_ep *ep;
-	u32 epxcr;
-	int i;
-
-	for (i = 0; i < 2; i++) {
-		ep = &u3d->eps[i];
-		ep->u3d = u3d;
-
-		/* ep0 ep context, ep0 in and out share the same ep context */
-		ep->ep_context = &u3d->ep_context[1];
-	}
-
-	/* reset ep state machine */
-	/* reset ep0 out */
-	epxcr = ioread32(&u3d->vuc_regs->epcr[0].epxoutcr0);
-	epxcr |= MV_U3D_EPXCR_EP_INIT;
-	iowrite32(epxcr, &u3d->vuc_regs->epcr[0].epxoutcr0);
-	udelay(5);
-	epxcr &= ~MV_U3D_EPXCR_EP_INIT;
-	iowrite32(epxcr, &u3d->vuc_regs->epcr[0].epxoutcr0);
-
-	epxcr = ((MV_U3D_EP0_MAX_PKT_SIZE
-		<< MV_U3D_EPXCR_MAX_PACKET_SIZE_SHIFT)
-		| (1 << MV_U3D_EPXCR_MAX_BURST_SIZE_SHIFT)
-		| (1 << MV_U3D_EPXCR_EP_ENABLE_SHIFT)
-		| MV_U3D_EPXCR_EP_TYPE_CONTROL);
-	iowrite32(epxcr, &u3d->vuc_regs->epcr[0].epxoutcr1);
-
-	/* reset ep0 in */
-	epxcr = ioread32(&u3d->vuc_regs->epcr[0].epxincr0);
-	epxcr |= MV_U3D_EPXCR_EP_INIT;
-	iowrite32(epxcr, &u3d->vuc_regs->epcr[0].epxincr0);
-	udelay(5);
-	epxcr &= ~MV_U3D_EPXCR_EP_INIT;
-	iowrite32(epxcr, &u3d->vuc_regs->epcr[0].epxincr0);
-
-	epxcr = ((MV_U3D_EP0_MAX_PKT_SIZE
-		<< MV_U3D_EPXCR_MAX_PACKET_SIZE_SHIFT)
-		| (1 << MV_U3D_EPXCR_MAX_BURST_SIZE_SHIFT)
-		| (1 << MV_U3D_EPXCR_EP_ENABLE_SHIFT)
-		| MV_U3D_EPXCR_EP_TYPE_CONTROL);
-	iowrite32(epxcr, &u3d->vuc_regs->epcr[0].epxincr1);
-}
-
-static void mv_u3d_ep0_stall(struct mv_u3d *u3d)
-{
-	u32 tmp;
-	dev_dbg(u3d->dev, "%s\n", __func__);
-
-	/* set TX and RX to stall */
-	tmp = ioread32(&u3d->vuc_regs->epcr[0].epxoutcr0);
-	tmp |= MV_U3D_EPXCR_EP_HALT;
-	iowrite32(tmp, &u3d->vuc_regs->epcr[0].epxoutcr0);
-
-	tmp = ioread32(&u3d->vuc_regs->epcr[0].epxincr0);
-	tmp |= MV_U3D_EPXCR_EP_HALT;
-	iowrite32(tmp, &u3d->vuc_regs->epcr[0].epxincr0);
-
-	/* update ep0 state */
-	u3d->ep0_state = MV_U3D_WAIT_FOR_SETUP;
-	u3d->ep0_dir = MV_U3D_EP_DIR_OUT;
-}
-
-static int mv_u3d_process_ep_req(struct mv_u3d *u3d, int index,
-	struct mv_u3d_req *curr_req)
-{
-	struct mv_u3d_trb	*curr_trb;
-	dma_addr_t cur_deq_lo;
-	struct mv_u3d_ep_context	*curr_ep_context;
-	int trb_complete, actual, remaining_length = 0;
-	int direction, ep_num;
-	int retval = 0;
-	u32 tmp, status, length;
-
-	curr_ep_context = &u3d->ep_context[index];
-	direction = index % 2;
-	ep_num = index / 2;
-
-	trb_complete = 0;
-	actual = curr_req->req.length;
-
-	while (!list_empty(&curr_req->trb_list)) {
-		curr_trb = list_entry(curr_req->trb_list.next,
-					struct mv_u3d_trb, trb_list);
-		if (!curr_trb->trb_hw->ctrl.own) {
-			dev_err(u3d->dev, "%s, TRB own error!\n",
-				u3d->eps[index].name);
-			return 1;
-		}
-
-		curr_trb->trb_hw->ctrl.own = 0;
-		if (direction == MV_U3D_EP_DIR_OUT) {
-			tmp = ioread32(&u3d->vuc_regs->rxst[ep_num].statuslo);
-			cur_deq_lo =
-				ioread32(&u3d->vuc_regs->rxst[ep_num].curdeqlo);
-		} else {
-			tmp = ioread32(&u3d->vuc_regs->txst[ep_num].statuslo);
-			cur_deq_lo =
-				ioread32(&u3d->vuc_regs->txst[ep_num].curdeqlo);
-		}
-
-		status = tmp >> MV_U3D_XFERSTATUS_COMPLETE_SHIFT;
-		length = tmp & MV_U3D_XFERSTATUS_TRB_LENGTH_MASK;
-
-		if (status == MV_U3D_COMPLETE_SUCCESS ||
-			(status == MV_U3D_COMPLETE_SHORT_PACKET &&
-			direction == MV_U3D_EP_DIR_OUT)) {
-			remaining_length += length;
-			actual -= remaining_length;
-		} else {
-			dev_err(u3d->dev,
-				"complete_tr error: ep=%d %s: error = 0x%x\n",
-				index >> 1, direction ? "SEND" : "RECV",
-				status);
-			retval = -EPROTO;
-		}
-
-		list_del_init(&curr_trb->trb_list);
-	}
-	if (retval)
-		return retval;
-
-	curr_req->req.actual = actual;
-	return 0;
-}
-
-/*
- * mv_u3d_done() - retire a request; caller blocked irqs
- * @status : request status to be set, only works when
- * request is still in progress.
- */
-static
-void mv_u3d_done(struct mv_u3d_ep *ep, struct mv_u3d_req *req, int status)
-	__releases(&ep->udc->lock)
-	__acquires(&ep->udc->lock)
-{
-	struct mv_u3d *u3d = (struct mv_u3d *)ep->u3d;
-
-	dev_dbg(u3d->dev, "mv_u3d_done: remove req->queue\n");
-	/* Removed the req from ep queue */
-	list_del_init(&req->queue);
-
-	/* req.status should be set as -EINPROGRESS in ep_queue() */
-	if (req->req.status == -EINPROGRESS)
-		req->req.status = status;
-	else
-		status = req->req.status;
-
-	/* Free trb for the request */
-	if (!req->chain)
-		dma_pool_free(u3d->trb_pool,
-			req->trb_head->trb_hw, req->trb_head->trb_dma);
-	else {
-		dma_unmap_single(ep->u3d->gadget.dev.parent,
-			(dma_addr_t)req->trb_head->trb_dma,
-			req->trb_count * sizeof(struct mv_u3d_trb_hw),
-			DMA_BIDIRECTIONAL);
-		kfree(req->trb_head->trb_hw);
-	}
-	kfree(req->trb_head);
-
-	usb_gadget_unmap_request(&u3d->gadget, &req->req, mv_u3d_ep_dir(ep));
-
-	if (status && (status != -ESHUTDOWN)) {
-		dev_dbg(u3d->dev, "complete %s req %p stat %d len %u/%u",
-			ep->ep.name, &req->req, status,
-			req->req.actual, req->req.length);
-	}
-
-	spin_unlock(&ep->u3d->lock);
-	/*
-	 * complete() is from gadget layer,
-	 * eg fsg->bulk_in_complete()
-	 */
-	if (req->req.complete)
-		req->req.complete(&ep->ep, &req->req);
-
-	spin_lock(&ep->u3d->lock);
-}
-
-static int mv_u3d_queue_trb(struct mv_u3d_ep *ep, struct mv_u3d_req *req)
-{
-	u32 tmp, direction;
-	struct mv_u3d *u3d;
-	struct mv_u3d_ep_context *ep_context;
-	int retval = 0;
-
-	u3d = ep->u3d;
-	direction = mv_u3d_ep_dir(ep);
-
-	/* ep0 in and out share the same ep context slot 1*/
-	if (ep->ep_num == 0)
-		ep_context = &(u3d->ep_context[1]);
-	else
-		ep_context = &(u3d->ep_context[ep->ep_num * 2 + direction]);
-
-	/* check if the pipe is empty or not */
-	if (!list_empty(&ep->queue)) {
-		dev_err(u3d->dev, "add trb to non-empty queue!\n");
-		retval = -ENOMEM;
-		WARN_ON(1);
-	} else {
-		ep_context->rsvd0 = cpu_to_le32(1);
-		ep_context->rsvd1 = 0;
-
-		/* Configure the trb address and set the DCS bit.
-		 * Both DCS bit and own bit in trb should be set.
-		 */
-		ep_context->trb_addr_lo =
-			cpu_to_le32(req->trb_head->trb_dma | DCS_ENABLE);
-		ep_context->trb_addr_hi = 0;
-
-		/* Ensure that updates to the EP Context will
-		 * occure before Ring Bell.
-		 */
-		wmb();
-
-		/* ring bell the ep */
-		if (ep->ep_num == 0)
-			tmp = 0x1;
-		else
-			tmp = ep->ep_num * 2
-				+ ((direction == MV_U3D_EP_DIR_OUT) ? 0 : 1);
-
-		iowrite32(tmp, &u3d->op_regs->doorbell);
-	}
-	return retval;
-}
-
-static struct mv_u3d_trb *mv_u3d_build_trb_one(struct mv_u3d_req *req,
-				unsigned *length, dma_addr_t *dma)
-{
-	u32 temp;
-	unsigned int direction;
-	struct mv_u3d_trb *trb;
-	struct mv_u3d_trb_hw *trb_hw;
-	struct mv_u3d *u3d;
-
-	/* how big will this transfer be? */
-	*length = req->req.length - req->req.actual;
-	BUG_ON(*length > (unsigned)MV_U3D_EP_MAX_LENGTH_TRANSFER);
-
-	u3d = req->ep->u3d;
-
-	trb = kzalloc(sizeof(*trb), GFP_ATOMIC);
-	if (!trb)
-		return NULL;
-
-	/*
-	 * Be careful that no _GFP_HIGHMEM is set,
-	 * or we can not use dma_to_virt
-	 * cannot use GFP_KERNEL in spin lock
-	 */
-	trb_hw = dma_pool_alloc(u3d->trb_pool, GFP_ATOMIC, dma);
-	if (!trb_hw) {
-		kfree(trb);
-		dev_err(u3d->dev,
-			"%s, dma_pool_alloc fail\n", __func__);
-		return NULL;
-	}
-	trb->trb_dma = *dma;
-	trb->trb_hw = trb_hw;
-
-	/* initialize buffer page pointers */
-	temp = (u32)(req->req.dma + req->req.actual);
-
-	trb_hw->buf_addr_lo = cpu_to_le32(temp);
-	trb_hw->buf_addr_hi = 0;
-	trb_hw->trb_len = cpu_to_le32(*length);
-	trb_hw->ctrl.own = 1;
-
-	if (req->ep->ep_num == 0)
-		trb_hw->ctrl.type = TYPE_DATA;
-	else
-		trb_hw->ctrl.type = TYPE_NORMAL;
-
-	req->req.actual += *length;
-
-	direction = mv_u3d_ep_dir(req->ep);
-	if (direction == MV_U3D_EP_DIR_IN)
-		trb_hw->ctrl.dir = 1;
-	else
-		trb_hw->ctrl.dir = 0;
-
-	/* Enable interrupt for the last trb of a request */
-	if (!req->req.no_interrupt)
-		trb_hw->ctrl.ioc = 1;
-
-	trb_hw->ctrl.chain = 0;
-
-	wmb();
-	return trb;
-}
-
-static int mv_u3d_build_trb_chain(struct mv_u3d_req *req, unsigned *length,
-		struct mv_u3d_trb *trb, int *is_last)
-{
-	u32 temp;
-	unsigned int direction;
-	struct mv_u3d *u3d;
-
-	/* how big will this transfer be? */
-	*length = min(req->req.length - req->req.actual,
-			(unsigned)MV_U3D_EP_MAX_LENGTH_TRANSFER);
-
-	u3d = req->ep->u3d;
-
-	trb->trb_dma = 0;
-
-	/* initialize buffer page pointers */
-	temp = (u32)(req->req.dma + req->req.actual);
-
-	trb->trb_hw->buf_addr_lo = cpu_to_le32(temp);
-	trb->trb_hw->buf_addr_hi = 0;
-	trb->trb_hw->trb_len = cpu_to_le32(*length);
-	trb->trb_hw->ctrl.own = 1;
-
-	if (req->ep->ep_num == 0)
-		trb->trb_hw->ctrl.type = TYPE_DATA;
-	else
-		trb->trb_hw->ctrl.type = TYPE_NORMAL;
-
-	req->req.actual += *length;
-
-	direction = mv_u3d_ep_dir(req->ep);
-	if (direction == MV_U3D_EP_DIR_IN)
-		trb->trb_hw->ctrl.dir = 1;
-	else
-		trb->trb_hw->ctrl.dir = 0;
-
-	/* zlp is needed if req->req.zero is set */
-	if (req->req.zero) {
-		if (*length == 0 || (*length % req->ep->ep.maxpacket) != 0)
-			*is_last = 1;
-		else
-			*is_last = 0;
-	} else if (req->req.length == req->req.actual)
-		*is_last = 1;
-	else
-		*is_last = 0;
-
-	/* Enable interrupt for the last trb of a request */
-	if (*is_last && !req->req.no_interrupt)
-		trb->trb_hw->ctrl.ioc = 1;
-
-	if (*is_last)
-		trb->trb_hw->ctrl.chain = 0;
-	else {
-		trb->trb_hw->ctrl.chain = 1;
-		dev_dbg(u3d->dev, "chain trb\n");
-	}
-
-	wmb();
-
-	return 0;
-}
-
-/* generate TRB linked list for a request
- * usb controller only supports continous trb chain,
- * that trb structure physical address should be continous.
- */
-static int mv_u3d_req_to_trb(struct mv_u3d_req *req)
-{
-	unsigned count;
-	int is_last;
-	struct mv_u3d_trb *trb;
-	struct mv_u3d_trb_hw *trb_hw;
-	struct mv_u3d *u3d;
-	dma_addr_t dma;
-	unsigned length;
-	unsigned trb_num;
-
-	u3d = req->ep->u3d;
-
-	INIT_LIST_HEAD(&req->trb_list);
-
-	length = req->req.length - req->req.actual;
-	/* normally the request transfer length is less than 16KB.
-	 * we use buil_trb_one() to optimize it.
-	 */
-	if (length <= (unsigned)MV_U3D_EP_MAX_LENGTH_TRANSFER) {
-		trb = mv_u3d_build_trb_one(req, &count, &dma);
-		list_add_tail(&trb->trb_list, &req->trb_list);
-		req->trb_head = trb;
-		req->trb_count = 1;
-		req->chain = 0;
-	} else {
-		trb_num = length / MV_U3D_EP_MAX_LENGTH_TRANSFER;
-		if (length % MV_U3D_EP_MAX_LENGTH_TRANSFER)
-			trb_num++;
-
-		trb = kcalloc(trb_num, sizeof(*trb), GFP_ATOMIC);
-		if (!trb)
-			return -ENOMEM;
-
-		trb_hw = kcalloc(trb_num, sizeof(*trb_hw), GFP_ATOMIC);
-		if (!trb_hw) {
-			kfree(trb);
-			return -ENOMEM;
-		}
-
-		do {
-			trb->trb_hw = trb_hw;
-			if (mv_u3d_build_trb_chain(req, &count,
-						trb, &is_last)) {
-				dev_err(u3d->dev,
-					"%s, mv_u3d_build_trb_chain fail\n",
-					__func__);
-				return -EIO;
-			}
-
-			list_add_tail(&trb->trb_list, &req->trb_list);
-			req->trb_count++;
-			trb++;
-			trb_hw++;
-		} while (!is_last);
-
-		req->trb_head = list_entry(req->trb_list.next,
-					struct mv_u3d_trb, trb_list);
-		req->trb_head->trb_dma = dma_map_single(u3d->gadget.dev.parent,
-					req->trb_head->trb_hw,
-					trb_num * sizeof(*trb_hw),
-					DMA_BIDIRECTIONAL);
-
-		req->chain = 1;
-	}
-
-	return 0;
-}
-
-static int
-mv_u3d_start_queue(struct mv_u3d_ep *ep)
-{
-	struct mv_u3d *u3d = ep->u3d;
-	struct mv_u3d_req *req;
-	int ret;
-
-	if (!list_empty(&ep->req_list) && !ep->processing)
-		req = list_entry(ep->req_list.next, struct mv_u3d_req, list);
-	else
-		return 0;
-
-	ep->processing = 1;
-
-	/* set up dma mapping */
-	ret = usb_gadget_map_request(&u3d->gadget, &req->req,
-					mv_u3d_ep_dir(ep));
-	if (ret)
-		return ret;
-
-	req->req.status = -EINPROGRESS;
-	req->req.actual = 0;
-	req->trb_count = 0;
-
-	/* build trbs and push them to device queue */
-	if (!mv_u3d_req_to_trb(req)) {
-		ret = mv_u3d_queue_trb(ep, req);
-		if (ret) {
-			ep->processing = 0;
-			return ret;
-		}
-	} else {
-		ep->processing = 0;
-		dev_err(u3d->dev, "%s, mv_u3d_req_to_trb fail\n", __func__);
-		return -ENOMEM;
-	}
-
-	/* irq handler advances the queue */
-	if (req)
-		list_add_tail(&req->queue, &ep->queue);
-
-	return 0;
-}
-
-static int mv_u3d_ep_enable(struct usb_ep *_ep,
-		const struct usb_endpoint_descriptor *desc)
-{
-	struct mv_u3d *u3d;
-	struct mv_u3d_ep *ep;
-	struct mv_u3d_ep_context *ep_context;
-	u16 max = 0;
-	unsigned maxburst = 0;
-	u32 epxcr, direction;
-
-	if (!_ep || !desc || desc->bDescriptorType != USB_DT_ENDPOINT)
-		return -EINVAL;
-
-	ep = container_of(_ep, struct mv_u3d_ep, ep);
-	u3d = ep->u3d;
-
-	if (!u3d->driver || u3d->gadget.speed == USB_SPEED_UNKNOWN)
-		return -ESHUTDOWN;
-
-	direction = mv_u3d_ep_dir(ep);
-	max = le16_to_cpu(desc->wMaxPacketSize);
-
-	if (!_ep->maxburst)
-		_ep->maxburst = 1;
-	maxburst = _ep->maxburst;
-
-	/* Get the endpoint context address */
-	ep_context = (struct mv_u3d_ep_context *)ep->ep_context;
-
-	/* Set the max burst size */
-	switch (desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) {
-	case USB_ENDPOINT_XFER_BULK:
-		if (maxburst > 16) {
-			dev_dbg(u3d->dev,
-				"max burst should not be greater "
-				"than 16 on bulk ep\n");
-			maxburst = 1;
-			_ep->maxburst = maxburst;
-		}
-		dev_dbg(u3d->dev,
-			"maxburst: %d on bulk %s\n", maxburst, ep->name);
-		break;
-	case USB_ENDPOINT_XFER_CONTROL:
-		/* control transfer only supports maxburst as one */
-		maxburst = 1;
-		_ep->maxburst = maxburst;
-		break;
-	case USB_ENDPOINT_XFER_INT:
-		if (maxburst != 1) {
-			dev_dbg(u3d->dev,
-				"max burst should be 1 on int ep "
-				"if transfer size is not 1024\n");
-			maxburst = 1;
-			_ep->maxburst = maxburst;
-		}
-		break;
-	case USB_ENDPOINT_XFER_ISOC:
-		if (maxburst != 1) {
-			dev_dbg(u3d->dev,
-				"max burst should be 1 on isoc ep "
-				"if transfer size is not 1024\n");
-			maxburst = 1;
-			_ep->maxburst = maxburst;
-		}
-		break;
-	default:
-		goto en_done;
-	}
-
-	ep->ep.maxpacket = max;
-	ep->ep.desc = desc;
-	ep->enabled = 1;
-
-	/* Enable the endpoint for Rx or Tx and set the endpoint type */
-	if (direction == MV_U3D_EP_DIR_OUT) {
-		epxcr = ioread32(&u3d->vuc_regs->epcr[ep->ep_num].epxoutcr0);
-		epxcr |= MV_U3D_EPXCR_EP_INIT;
-		iowrite32(epxcr, &u3d->vuc_regs->epcr[ep->ep_num].epxoutcr0);
-		udelay(5);
-		epxcr &= ~MV_U3D_EPXCR_EP_INIT;
-		iowrite32(epxcr, &u3d->vuc_regs->epcr[ep->ep_num].epxoutcr0);
-
-		epxcr = ((max << MV_U3D_EPXCR_MAX_PACKET_SIZE_SHIFT)
-		      | ((maxburst - 1) << MV_U3D_EPXCR_MAX_BURST_SIZE_SHIFT)
-		      | (1 << MV_U3D_EPXCR_EP_ENABLE_SHIFT)
-		      | (desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK));
-		iowrite32(epxcr, &u3d->vuc_regs->epcr[ep->ep_num].epxoutcr1);
-	} else {
-		epxcr = ioread32(&u3d->vuc_regs->epcr[ep->ep_num].epxincr0);
-		epxcr |= MV_U3D_EPXCR_EP_INIT;
-		iowrite32(epxcr, &u3d->vuc_regs->epcr[ep->ep_num].epxincr0);
-		udelay(5);
-		epxcr &= ~MV_U3D_EPXCR_EP_INIT;
-		iowrite32(epxcr, &u3d->vuc_regs->epcr[ep->ep_num].epxincr0);
-
-		epxcr = ((max << MV_U3D_EPXCR_MAX_PACKET_SIZE_SHIFT)
-		      | ((maxburst - 1) << MV_U3D_EPXCR_MAX_BURST_SIZE_SHIFT)
-		      | (1 << MV_U3D_EPXCR_EP_ENABLE_SHIFT)
-		      | (desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK));
-		iowrite32(epxcr, &u3d->vuc_regs->epcr[ep->ep_num].epxincr1);
-	}
-
-	return 0;
-en_done:
-	return -EINVAL;
-}
-
-static int  mv_u3d_ep_disable(struct usb_ep *_ep)
-{
-	struct mv_u3d *u3d;
-	struct mv_u3d_ep *ep;
-	struct mv_u3d_ep_context *ep_context;
-	u32 epxcr, direction;
-	unsigned long flags;
-
-	if (!_ep)
-		return -EINVAL;
-
-	ep = container_of(_ep, struct mv_u3d_ep, ep);
-	if (!ep->ep.desc)
-		return -EINVAL;
-
-	u3d = ep->u3d;
-
-	/* Get the endpoint context address */
-	ep_context = ep->ep_context;
-
-	direction = mv_u3d_ep_dir(ep);
-
-	/* nuke all pending requests (does flush) */
-	spin_lock_irqsave(&u3d->lock, flags);
-	mv_u3d_nuke(ep, -ESHUTDOWN);
-	spin_unlock_irqrestore(&u3d->lock, flags);
-
-	/* Disable the endpoint for Rx or Tx and reset the endpoint type */
-	if (direction == MV_U3D_EP_DIR_OUT) {
-		epxcr = ioread32(&u3d->vuc_regs->epcr[ep->ep_num].epxoutcr1);
-		epxcr &= ~((1 << MV_U3D_EPXCR_EP_ENABLE_SHIFT)
-		      | USB_ENDPOINT_XFERTYPE_MASK);
-		iowrite32(epxcr, &u3d->vuc_regs->epcr[ep->ep_num].epxoutcr1);
-	} else {
-		epxcr = ioread32(&u3d->vuc_regs->epcr[ep->ep_num].epxincr1);
-		epxcr &= ~((1 << MV_U3D_EPXCR_EP_ENABLE_SHIFT)
-		      | USB_ENDPOINT_XFERTYPE_MASK);
-		iowrite32(epxcr, &u3d->vuc_regs->epcr[ep->ep_num].epxincr1);
-	}
-
-	ep->enabled = 0;
-
-	ep->ep.desc = NULL;
-	return 0;
-}
-
-static struct usb_request *
-mv_u3d_alloc_request(struct usb_ep *_ep, gfp_t gfp_flags)
-{
-	struct mv_u3d_req *req = NULL;
-
-	req = kzalloc(sizeof *req, gfp_flags);
-	if (!req)
-		return NULL;
-
-	INIT_LIST_HEAD(&req->queue);
-
-	return &req->req;
-}
-
-static void mv_u3d_free_request(struct usb_ep *_ep, struct usb_request *_req)
-{
-	struct mv_u3d_req *req = container_of(_req, struct mv_u3d_req, req);
-
-	kfree(req);
-}
-
-static void mv_u3d_ep_fifo_flush(struct usb_ep *_ep)
-{
-	struct mv_u3d *u3d;
-	u32 direction;
-	struct mv_u3d_ep *ep = container_of(_ep, struct mv_u3d_ep, ep);
-	unsigned int loops;
-	u32 tmp;
-
-	/* if endpoint is not enabled, cannot flush endpoint */
-	if (!ep->enabled)
-		return;
-
-	u3d = ep->u3d;
-	direction = mv_u3d_ep_dir(ep);
-
-	/* ep0 need clear bit after flushing fifo. */
-	if (!ep->ep_num) {
-		if (direction == MV_U3D_EP_DIR_OUT) {
-			tmp = ioread32(&u3d->vuc_regs->epcr[0].epxoutcr0);
-			tmp |= MV_U3D_EPXCR_EP_FLUSH;
-			iowrite32(tmp, &u3d->vuc_regs->epcr[0].epxoutcr0);
-			udelay(10);
-			tmp &= ~MV_U3D_EPXCR_EP_FLUSH;
-			iowrite32(tmp, &u3d->vuc_regs->epcr[0].epxoutcr0);
-		} else {
-			tmp = ioread32(&u3d->vuc_regs->epcr[0].epxincr0);
-			tmp |= MV_U3D_EPXCR_EP_FLUSH;
-			iowrite32(tmp, &u3d->vuc_regs->epcr[0].epxincr0);
-			udelay(10);
-			tmp &= ~MV_U3D_EPXCR_EP_FLUSH;
-			iowrite32(tmp, &u3d->vuc_regs->epcr[0].epxincr0);
-		}
-		return;
-	}
-
-	if (direction == MV_U3D_EP_DIR_OUT) {
-		tmp = ioread32(&u3d->vuc_regs->epcr[ep->ep_num].epxoutcr0);
-		tmp |= MV_U3D_EPXCR_EP_FLUSH;
-		iowrite32(tmp, &u3d->vuc_regs->epcr[ep->ep_num].epxoutcr0);
-
-		/* Wait until flushing completed */
-		loops = LOOPS(MV_U3D_FLUSH_TIMEOUT);
-		while (ioread32(&u3d->vuc_regs->epcr[ep->ep_num].epxoutcr0) &
-			MV_U3D_EPXCR_EP_FLUSH) {
-			/*
-			 * EP_FLUSH bit should be cleared to indicate this
-			 * operation is complete
-			 */
-			if (loops == 0) {
-				dev_dbg(u3d->dev,
-				    "EP FLUSH TIMEOUT for ep%d%s\n", ep->ep_num,
-				    direction ? "in" : "out");
-				return;
-			}
-			loops--;
-			udelay(LOOPS_USEC);
-		}
-	} else {	/* EP_DIR_IN */
-		tmp = ioread32(&u3d->vuc_regs->epcr[ep->ep_num].epxincr0);
-		tmp |= MV_U3D_EPXCR_EP_FLUSH;
-		iowrite32(tmp, &u3d->vuc_regs->epcr[ep->ep_num].epxincr0);
-
-		/* Wait until flushing completed */
-		loops = LOOPS(MV_U3D_FLUSH_TIMEOUT);
-		while (ioread32(&u3d->vuc_regs->epcr[ep->ep_num].epxincr0) &
-			MV_U3D_EPXCR_EP_FLUSH) {
-			/*
-			* EP_FLUSH bit should be cleared to indicate this
-			* operation is complete
-			*/
-			if (loops == 0) {
-				dev_dbg(u3d->dev,
-				    "EP FLUSH TIMEOUT for ep%d%s\n", ep->ep_num,
-				    direction ? "in" : "out");
-				return;
-			}
-			loops--;
-			udelay(LOOPS_USEC);
-		}
-	}
-}
-
-/* queues (submits) an I/O request to an endpoint */
-static int
-mv_u3d_ep_queue(struct usb_ep *_ep, struct usb_request *_req, gfp_t gfp_flags)
-{
-	struct mv_u3d_ep *ep;
-	struct mv_u3d_req *req;
-	struct mv_u3d *u3d;
-	unsigned long flags;
-	int is_first_req = 0;
-
-	if (unlikely(!_ep || !_req))
-		return -EINVAL;
-
-	ep = container_of(_ep, struct mv_u3d_ep, ep);
-	u3d = ep->u3d;
-
-	req = container_of(_req, struct mv_u3d_req, req);
-
-	if (!ep->ep_num
-		&& u3d->ep0_state == MV_U3D_STATUS_STAGE
-		&& !_req->length) {
-		dev_dbg(u3d->dev, "ep0 status stage\n");
-		u3d->ep0_state = MV_U3D_WAIT_FOR_SETUP;
-		return 0;
-	}
-
-	dev_dbg(u3d->dev, "%s: %s, req: 0x%p\n",
-			__func__, _ep->name, req);
-
-	/* catch various bogus parameters */
-	if (!req->req.complete || !req->req.buf
-			|| !list_empty(&req->queue)) {
-		dev_err(u3d->dev,
-			"%s, bad params, _req: 0x%p,"
-			"req->req.complete: 0x%p, req->req.buf: 0x%p,"
-			"list_empty: 0x%x\n",
-			__func__, _req,
-			req->req.complete, req->req.buf,
-			list_empty(&req->queue));
-		return -EINVAL;
-	}
-	if (unlikely(!ep->ep.desc)) {
-		dev_err(u3d->dev, "%s, bad ep\n", __func__);
-		return -EINVAL;
-	}
-	if (ep->ep.desc->bmAttributes == USB_ENDPOINT_XFER_ISOC) {
-		if (req->req.length > ep->ep.maxpacket)
-			return -EMSGSIZE;
-	}
-
-	if (!u3d->driver || u3d->gadget.speed == USB_SPEED_UNKNOWN) {
-		dev_err(u3d->dev,
-			"bad params of driver/speed\n");
-		return -ESHUTDOWN;
-	}
-
-	req->ep = ep;
-
-	/* Software list handles usb request. */
-	spin_lock_irqsave(&ep->req_lock, flags);
-	is_first_req = list_empty(&ep->req_list);
-	list_add_tail(&req->list, &ep->req_list);
-	spin_unlock_irqrestore(&ep->req_lock, flags);
-	if (!is_first_req) {
-		dev_dbg(u3d->dev, "list is not empty\n");
-		return 0;
-	}
-
-	dev_dbg(u3d->dev, "call mv_u3d_start_queue from usb_ep_queue\n");
-	spin_lock_irqsave(&u3d->lock, flags);
-	mv_u3d_start_queue(ep);
-	spin_unlock_irqrestore(&u3d->lock, flags);
-	return 0;
-}
-
-/* dequeues (cancels, unlinks) an I/O request from an endpoint */
-static int mv_u3d_ep_dequeue(struct usb_ep *_ep, struct usb_request *_req)
-{
-	struct mv_u3d_ep *ep;
-	struct mv_u3d_req *req;
-	struct mv_u3d *u3d;
-	struct mv_u3d_ep_context *ep_context;
-	struct mv_u3d_req *next_req;
-
-	unsigned long flags;
-	int ret = 0;
-
-	if (!_ep || !_req)
-		return -EINVAL;
-
-	ep = container_of(_ep, struct mv_u3d_ep, ep);
-	u3d = ep->u3d;
-
-	spin_lock_irqsave(&ep->u3d->lock, flags);
-
-	/* make sure it's actually queued on this endpoint */
-	list_for_each_entry(req, &ep->queue, queue) {
-		if (&req->req == _req)
-			break;
-	}
-	if (&req->req != _req) {
-		ret = -EINVAL;
-		goto out;
-	}
-
-	/* The request is in progress, or completed but not dequeued */
-	if (ep->queue.next == &req->queue) {
-		_req->status = -ECONNRESET;
-		mv_u3d_ep_fifo_flush(_ep);
-
-		/* The request isn't the last request in this ep queue */
-		if (req->queue.next != &ep->queue) {
-			dev_dbg(u3d->dev,
-				"it is the last request in this ep queue\n");
-			ep_context = ep->ep_context;
-			next_req = list_entry(req->queue.next,
-					struct mv_u3d_req, queue);
-
-			/* Point first TRB of next request to the EP context. */
-			iowrite32((unsigned long) next_req->trb_head,
-					&ep_context->trb_addr_lo);
-		} else {
-			struct mv_u3d_ep_context *ep_context;
-			ep_context = ep->ep_context;
-			ep_context->trb_addr_lo = 0;
-			ep_context->trb_addr_hi = 0;
-		}
-
-	} else
-		WARN_ON(1);
-
-	mv_u3d_done(ep, req, -ECONNRESET);
-
-	/* remove the req from the ep req list */
-	if (!list_empty(&ep->req_list)) {
-		struct mv_u3d_req *curr_req;
-		curr_req = list_entry(ep->req_list.next,
-					struct mv_u3d_req, list);
-		if (curr_req == req) {
-			list_del_init(&req->list);
-			ep->processing = 0;
-		}
-	}
-
-out:
-	spin_unlock_irqrestore(&ep->u3d->lock, flags);
-	return ret;
-}
-
-static void
-mv_u3d_ep_set_stall(struct mv_u3d *u3d, u8 ep_num, u8 direction, int stall)
-{
-	u32 tmp;
-	struct mv_u3d_ep *ep = u3d->eps;
-
-	dev_dbg(u3d->dev, "%s\n", __func__);
-	if (direction == MV_U3D_EP_DIR_OUT) {
-		tmp = ioread32(&u3d->vuc_regs->epcr[ep->ep_num].epxoutcr0);
-		if (stall)
-			tmp |= MV_U3D_EPXCR_EP_HALT;
-		else
-			tmp &= ~MV_U3D_EPXCR_EP_HALT;
-		iowrite32(tmp, &u3d->vuc_regs->epcr[ep->ep_num].epxoutcr0);
-	} else {
-		tmp = ioread32(&u3d->vuc_regs->epcr[ep->ep_num].epxincr0);
-		if (stall)
-			tmp |= MV_U3D_EPXCR_EP_HALT;
-		else
-			tmp &= ~MV_U3D_EPXCR_EP_HALT;
-		iowrite32(tmp, &u3d->vuc_regs->epcr[ep->ep_num].epxincr0);
-	}
-}
-
-static int mv_u3d_ep_set_halt_wedge(struct usb_ep *_ep, int halt, int wedge)
-{
-	struct mv_u3d_ep *ep;
-	unsigned long flags = 0;
-	int status = 0;
-	struct mv_u3d *u3d;
-
-	ep = container_of(_ep, struct mv_u3d_ep, ep);
-	u3d = ep->u3d;
-	if (!ep->ep.desc) {
-		status = -EINVAL;
-		goto out;
-	}
-
-	if (ep->ep.desc->bmAttributes == USB_ENDPOINT_XFER_ISOC) {
-		status = -EOPNOTSUPP;
-		goto out;
-	}
-
-	/*
-	 * Attempt to halt IN ep will fail if any transfer requests
-	 * are still queue
-	 */
-	if (halt && (mv_u3d_ep_dir(ep) == MV_U3D_EP_DIR_IN)
-			&& !list_empty(&ep->queue)) {
-		status = -EAGAIN;
-		goto out;
-	}
-
-	spin_lock_irqsave(&ep->u3d->lock, flags);
-	mv_u3d_ep_set_stall(u3d, ep->ep_num, mv_u3d_ep_dir(ep), halt);
-	if (halt && wedge)
-		ep->wedge = 1;
-	else if (!halt)
-		ep->wedge = 0;
-	spin_unlock_irqrestore(&ep->u3d->lock, flags);
-
-	if (ep->ep_num == 0)
-		u3d->ep0_dir = MV_U3D_EP_DIR_OUT;
-out:
-	return status;
-}
-
-static int mv_u3d_ep_set_halt(struct usb_ep *_ep, int halt)
-{
-	return mv_u3d_ep_set_halt_wedge(_ep, halt, 0);
-}
-
-static int mv_u3d_ep_set_wedge(struct usb_ep *_ep)
-{
-	return mv_u3d_ep_set_halt_wedge(_ep, 1, 1);
-}
-
-static struct usb_ep_ops mv_u3d_ep_ops = {
-	.enable		= mv_u3d_ep_enable,
-	.disable	= mv_u3d_ep_disable,
-
-	.alloc_request	= mv_u3d_alloc_request,
-	.free_request	= mv_u3d_free_request,
-
-	.queue		= mv_u3d_ep_queue,
-	.dequeue	= mv_u3d_ep_dequeue,
-
-	.set_wedge	= mv_u3d_ep_set_wedge,
-	.set_halt	= mv_u3d_ep_set_halt,
-	.fifo_flush	= mv_u3d_ep_fifo_flush,
-};
-
-static void mv_u3d_controller_stop(struct mv_u3d *u3d)
-{
-	u32 tmp;
-
-	if (!u3d->clock_gating && u3d->vbus_valid_detect)
-		iowrite32(MV_U3D_INTR_ENABLE_VBUS_VALID,
-				&u3d->vuc_regs->intrenable);
-	else
-		iowrite32(0, &u3d->vuc_regs->intrenable);
-	iowrite32(~0x0, &u3d->vuc_regs->endcomplete);
-	iowrite32(~0x0, &u3d->vuc_regs->trbunderrun);
-	iowrite32(~0x0, &u3d->vuc_regs->trbcomplete);
-	iowrite32(~0x0, &u3d->vuc_regs->linkchange);
-	iowrite32(0x1, &u3d->vuc_regs->setuplock);
-
-	/* Reset the RUN bit in the command register to stop USB */
-	tmp = ioread32(&u3d->op_regs->usbcmd);
-	tmp &= ~MV_U3D_CMD_RUN_STOP;
-	iowrite32(tmp, &u3d->op_regs->usbcmd);
-	dev_dbg(u3d->dev, "after u3d_stop, USBCMD 0x%x\n",
-		ioread32(&u3d->op_regs->usbcmd));
-}
-
-static void mv_u3d_controller_start(struct mv_u3d *u3d)
-{
-	u32 usbintr;
-	u32 temp;
-
-	/* enable link LTSSM state machine */
-	temp = ioread32(&u3d->vuc_regs->ltssm);
-	temp |= MV_U3D_LTSSM_PHY_INIT_DONE;
-	iowrite32(temp, &u3d->vuc_regs->ltssm);
-
-	/* Enable interrupts */
-	usbintr = MV_U3D_INTR_ENABLE_LINK_CHG | MV_U3D_INTR_ENABLE_TXDESC_ERR |
-		MV_U3D_INTR_ENABLE_RXDESC_ERR | MV_U3D_INTR_ENABLE_TX_COMPLETE |
-		MV_U3D_INTR_ENABLE_RX_COMPLETE | MV_U3D_INTR_ENABLE_SETUP |
-		(u3d->vbus_valid_detect ? MV_U3D_INTR_ENABLE_VBUS_VALID : 0);
-	iowrite32(usbintr, &u3d->vuc_regs->intrenable);
-
-	/* Enable ctrl ep */
-	iowrite32(0x1, &u3d->vuc_regs->ctrlepenable);
-
-	/* Set the Run bit in the command register */
-	iowrite32(MV_U3D_CMD_RUN_STOP, &u3d->op_regs->usbcmd);
-	dev_dbg(u3d->dev, "after u3d_start, USBCMD 0x%x\n",
-		ioread32(&u3d->op_regs->usbcmd));
-}
-
-static int mv_u3d_controller_reset(struct mv_u3d *u3d)
-{
-	unsigned int loops;
-	u32 tmp;
-
-	/* Stop the controller */
-	tmp = ioread32(&u3d->op_regs->usbcmd);
-	tmp &= ~MV_U3D_CMD_RUN_STOP;
-	iowrite32(tmp, &u3d->op_regs->usbcmd);
-
-	/* Reset the controller to get default values */
-	iowrite32(MV_U3D_CMD_CTRL_RESET, &u3d->op_regs->usbcmd);
-
-	/* wait for reset to complete */
-	loops = LOOPS(MV_U3D_RESET_TIMEOUT);
-	while (ioread32(&u3d->op_regs->usbcmd) & MV_U3D_CMD_CTRL_RESET) {
-		if (loops == 0) {
-			dev_err(u3d->dev,
-				"Wait for RESET completed TIMEOUT\n");
-			return -ETIMEDOUT;
-		}
-		loops--;
-		udelay(LOOPS_USEC);
-	}
-
-	/* Configure the Endpoint Context Address */
-	iowrite32(u3d->ep_context_dma, &u3d->op_regs->dcbaapl);
-	iowrite32(0, &u3d->op_regs->dcbaaph);
-
-	return 0;
-}
-
-static int mv_u3d_enable(struct mv_u3d *u3d)
-{
-	struct mv_usb_platform_data *pdata = dev_get_platdata(u3d->dev);
-	int retval;
-
-	if (u3d->active)
-		return 0;
-
-	if (!u3d->clock_gating) {
-		u3d->active = 1;
-		return 0;
-	}
-
-	dev_dbg(u3d->dev, "enable u3d\n");
-	clk_enable(u3d->clk);
-	if (pdata->phy_init) {
-		retval = pdata->phy_init(u3d->phy_regs);
-		if (retval) {
-			dev_err(u3d->dev,
-				"init phy error %d\n", retval);
-			clk_disable(u3d->clk);
-			return retval;
-		}
-	}
-	u3d->active = 1;
-
-	return 0;
-}
-
-static void mv_u3d_disable(struct mv_u3d *u3d)
-{
-	struct mv_usb_platform_data *pdata = dev_get_platdata(u3d->dev);
-	if (u3d->clock_gating && u3d->active) {
-		dev_dbg(u3d->dev, "disable u3d\n");
-		if (pdata->phy_deinit)
-			pdata->phy_deinit(u3d->phy_regs);
-		clk_disable(u3d->clk);
-		u3d->active = 0;
-	}
-}
-
-static int mv_u3d_vbus_session(struct usb_gadget *gadget, int is_active)
-{
-	struct mv_u3d *u3d;
-	unsigned long flags;
-	int retval = 0;
-
-	u3d = container_of(gadget, struct mv_u3d, gadget);
-
-	spin_lock_irqsave(&u3d->lock, flags);
-
-	u3d->vbus_active = (is_active != 0);
-	dev_dbg(u3d->dev, "%s: softconnect %d, vbus_active %d\n",
-		__func__, u3d->softconnect, u3d->vbus_active);
-	/*
-	 * 1. external VBUS detect: we can disable/enable clock on demand.
-	 * 2. UDC VBUS detect: we have to enable clock all the time.
-	 * 3. No VBUS detect: we have to enable clock all the time.
-	 */
-	if (u3d->driver && u3d->softconnect && u3d->vbus_active) {
-		retval = mv_u3d_enable(u3d);
-		if (retval == 0) {
-			/*
-			 * after clock is disabled, we lost all the register
-			 *  context. We have to re-init registers
-			 */
-			mv_u3d_controller_reset(u3d);
-			mv_u3d_ep0_reset(u3d);
-			mv_u3d_controller_start(u3d);
-		}
-	} else if (u3d->driver && u3d->softconnect) {
-		if (!u3d->active)
-			goto out;
-
-		/* stop all the transfer in queue*/
-		mv_u3d_stop_activity(u3d, u3d->driver);
-		mv_u3d_controller_stop(u3d);
-		mv_u3d_disable(u3d);
-	}
-
-out:
-	spin_unlock_irqrestore(&u3d->lock, flags);
-	return retval;
-}
-
-/* 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 mv_u3d_vbus_draw(struct usb_gadget *gadget, unsigned mA)
-{
-	struct mv_u3d *u3d = container_of(gadget, struct mv_u3d, gadget);
-
-	u3d->power = mA;
-
-	return 0;
-}
-
-static int mv_u3d_pullup(struct usb_gadget *gadget, int is_on)
-{
-	struct mv_u3d *u3d = container_of(gadget, struct mv_u3d, gadget);
-	unsigned long flags;
-	int retval = 0;
-
-	spin_lock_irqsave(&u3d->lock, flags);
-
-	dev_dbg(u3d->dev, "%s: softconnect %d, vbus_active %d\n",
-		__func__, u3d->softconnect, u3d->vbus_active);
-	u3d->softconnect = (is_on != 0);
-	if (u3d->driver && u3d->softconnect && u3d->vbus_active) {
-		retval = mv_u3d_enable(u3d);
-		if (retval == 0) {
-			/*
-			 * after clock is disabled, we lost all the register
-			 *  context. We have to re-init registers
-			 */
-			mv_u3d_controller_reset(u3d);
-			mv_u3d_ep0_reset(u3d);
-			mv_u3d_controller_start(u3d);
-		}
-	} else if (u3d->driver && u3d->vbus_active) {
-		/* stop all the transfer in queue*/
-		mv_u3d_stop_activity(u3d, u3d->driver);
-		mv_u3d_controller_stop(u3d);
-		mv_u3d_disable(u3d);
-	}
-
-	spin_unlock_irqrestore(&u3d->lock, flags);
-
-	return retval;
-}
-
-static int mv_u3d_start(struct usb_gadget *g,
-		struct usb_gadget_driver *driver)
-{
-	struct mv_u3d *u3d = container_of(g, struct mv_u3d, gadget);
-	struct mv_usb_platform_data *pdata = dev_get_platdata(u3d->dev);
-	unsigned long flags;
-
-	if (u3d->driver)
-		return -EBUSY;
-
-	spin_lock_irqsave(&u3d->lock, flags);
-
-	if (!u3d->clock_gating) {
-		clk_enable(u3d->clk);
-		if (pdata->phy_init)
-			pdata->phy_init(u3d->phy_regs);
-	}
-
-	/* hook up the driver ... */
-	driver->driver.bus = NULL;
-	u3d->driver = driver;
-
-	u3d->ep0_dir = USB_DIR_OUT;
-
-	spin_unlock_irqrestore(&u3d->lock, flags);
-
-	u3d->vbus_valid_detect = 1;
-
-	return 0;
-}
-
-static int mv_u3d_stop(struct usb_gadget *g,
-		struct usb_gadget_driver *driver)
-{
-	struct mv_u3d *u3d = container_of(g, struct mv_u3d, gadget);
-	struct mv_usb_platform_data *pdata = dev_get_platdata(u3d->dev);
-	unsigned long flags;
-
-	u3d->vbus_valid_detect = 0;
-	spin_lock_irqsave(&u3d->lock, flags);
-
-	/* enable clock to access controller register */
-	clk_enable(u3d->clk);
-	if (pdata->phy_init)
-		pdata->phy_init(u3d->phy_regs);
-
-	mv_u3d_controller_stop(u3d);
-	/* stop all usb activities */
-	u3d->gadget.speed = USB_SPEED_UNKNOWN;
-	mv_u3d_stop_activity(u3d, driver);
-	mv_u3d_disable(u3d);
-
-	if (pdata->phy_deinit)
-		pdata->phy_deinit(u3d->phy_regs);
-	clk_disable(u3d->clk);
-
-	spin_unlock_irqrestore(&u3d->lock, flags);
-
-	u3d->driver = NULL;
-
-	return 0;
-}
-
-/* device controller usb_gadget_ops structure */
-static const struct usb_gadget_ops mv_u3d_ops = {
-	/* notify controller that VBUS is powered or not */
-	.vbus_session	= mv_u3d_vbus_session,
-
-	/* constrain controller's VBUS power usage */
-	.vbus_draw	= mv_u3d_vbus_draw,
-
-	.pullup		= mv_u3d_pullup,
-	.udc_start	= mv_u3d_start,
-	.udc_stop	= mv_u3d_stop,
-};
-
-static int mv_u3d_eps_init(struct mv_u3d *u3d)
-{
-	struct mv_u3d_ep	*ep;
-	char name[14];
-	int i;
-
-	/* initialize ep0, ep0 in/out use eps[1] */
-	ep = &u3d->eps[1];
-	ep->u3d = u3d;
-	strncpy(ep->name, "ep0", sizeof(ep->name));
-	ep->ep.name = ep->name;
-	ep->ep.ops = &mv_u3d_ep_ops;
-	ep->wedge = 0;
-	usb_ep_set_maxpacket_limit(&ep->ep, MV_U3D_EP0_MAX_PKT_SIZE);
-	ep->ep_num = 0;
-	ep->ep.desc = &mv_u3d_ep0_desc;
-	INIT_LIST_HEAD(&ep->queue);
-	INIT_LIST_HEAD(&ep->req_list);
-	ep->ep_type = USB_ENDPOINT_XFER_CONTROL;
-
-	/* add ep0 ep_context */
-	ep->ep_context = &u3d->ep_context[1];
-
-	/* initialize other endpoints */
-	for (i = 2; i < u3d->max_eps * 2; i++) {
-		ep = &u3d->eps[i];
-		if (i & 1) {
-			snprintf(name, sizeof(name), "ep%din", i >> 1);
-			ep->direction = MV_U3D_EP_DIR_IN;
-		} else {
-			snprintf(name, sizeof(name), "ep%dout", i >> 1);
-			ep->direction = MV_U3D_EP_DIR_OUT;
-		}
-		ep->u3d = u3d;
-		strncpy(ep->name, name, sizeof(ep->name));
-		ep->ep.name = ep->name;
-
-		ep->ep.ops = &mv_u3d_ep_ops;
-		usb_ep_set_maxpacket_limit(&ep->ep, (unsigned short) ~0);
-		ep->ep_num = i / 2;
-
-		INIT_LIST_HEAD(&ep->queue);
-		list_add_tail(&ep->ep.ep_list, &u3d->gadget.ep_list);
-
-		INIT_LIST_HEAD(&ep->req_list);
-		spin_lock_init(&ep->req_lock);
-		ep->ep_context = &u3d->ep_context[i];
-	}
-
-	return 0;
-}
-
-/* delete all endpoint requests, called with spinlock held */
-static void mv_u3d_nuke(struct mv_u3d_ep *ep, int status)
-{
-	/* endpoint fifo flush */
-	mv_u3d_ep_fifo_flush(&ep->ep);
-
-	while (!list_empty(&ep->queue)) {
-		struct mv_u3d_req *req = NULL;
-		req = list_entry(ep->queue.next, struct mv_u3d_req, queue);
-		mv_u3d_done(ep, req, status);
-	}
-}
-
-/* stop all USB activities */
-static
-void mv_u3d_stop_activity(struct mv_u3d *u3d, struct usb_gadget_driver *driver)
-{
-	struct mv_u3d_ep	*ep;
-
-	mv_u3d_nuke(&u3d->eps[1], -ESHUTDOWN);
-
-	list_for_each_entry(ep, &u3d->gadget.ep_list, ep.ep_list) {
-		mv_u3d_nuke(ep, -ESHUTDOWN);
-	}
-
-	/* report disconnect; the driver is already quiesced */
-	if (driver) {
-		spin_unlock(&u3d->lock);
-		driver->disconnect(&u3d->gadget);
-		spin_lock(&u3d->lock);
-	}
-}
-
-static void mv_u3d_irq_process_error(struct mv_u3d *u3d)
-{
-	/* Increment the error count */
-	u3d->errors++;
-	dev_err(u3d->dev, "%s\n", __func__);
-}
-
-static void mv_u3d_irq_process_link_change(struct mv_u3d *u3d)
-{
-	u32 linkchange;
-
-	linkchange = ioread32(&u3d->vuc_regs->linkchange);
-	iowrite32(linkchange, &u3d->vuc_regs->linkchange);
-
-	dev_dbg(u3d->dev, "linkchange: 0x%x\n", linkchange);
-
-	if (linkchange & MV_U3D_LINK_CHANGE_LINK_UP) {
-		dev_dbg(u3d->dev, "link up: ltssm state: 0x%x\n",
-			ioread32(&u3d->vuc_regs->ltssmstate));
-
-		u3d->usb_state = USB_STATE_DEFAULT;
-		u3d->ep0_dir = MV_U3D_EP_DIR_OUT;
-		u3d->ep0_state = MV_U3D_WAIT_FOR_SETUP;
-
-		/* set speed */
-		u3d->gadget.speed = USB_SPEED_SUPER;
-	}
-
-	if (linkchange & MV_U3D_LINK_CHANGE_SUSPEND) {
-		dev_dbg(u3d->dev, "link suspend\n");
-		u3d->resume_state = u3d->usb_state;
-		u3d->usb_state = USB_STATE_SUSPENDED;
-	}
-
-	if (linkchange & MV_U3D_LINK_CHANGE_RESUME) {
-		dev_dbg(u3d->dev, "link resume\n");
-		u3d->usb_state = u3d->resume_state;
-		u3d->resume_state = 0;
-	}
-
-	if (linkchange & MV_U3D_LINK_CHANGE_WRESET) {
-		dev_dbg(u3d->dev, "warm reset\n");
-		u3d->usb_state = USB_STATE_POWERED;
-	}
-
-	if (linkchange & MV_U3D_LINK_CHANGE_HRESET) {
-		dev_dbg(u3d->dev, "hot reset\n");
-		u3d->usb_state = USB_STATE_DEFAULT;
-	}
-
-	if (linkchange & MV_U3D_LINK_CHANGE_INACT)
-		dev_dbg(u3d->dev, "inactive\n");
-
-	if (linkchange & MV_U3D_LINK_CHANGE_DISABLE_AFTER_U0)
-		dev_dbg(u3d->dev, "ss.disabled\n");
-
-	if (linkchange & MV_U3D_LINK_CHANGE_VBUS_INVALID) {
-		dev_dbg(u3d->dev, "vbus invalid\n");
-		u3d->usb_state = USB_STATE_ATTACHED;
-		u3d->vbus_valid_detect = 1;
-		/* if external vbus detect is not supported,
-		 * we handle it here.
-		 */
-		if (!u3d->vbus) {
-			spin_unlock(&u3d->lock);
-			mv_u3d_vbus_session(&u3d->gadget, 0);
-			spin_lock(&u3d->lock);
-		}
-	}
-}
-
-static void mv_u3d_ch9setaddress(struct mv_u3d *u3d,
-				struct usb_ctrlrequest *setup)
-{
-	u32 tmp;
-
-	if (u3d->usb_state != USB_STATE_DEFAULT) {
-		dev_err(u3d->dev,
-			"%s, cannot setaddr in this state (%d)\n",
-			__func__, u3d->usb_state);
-		goto err;
-	}
-
-	u3d->dev_addr = (u8)setup->wValue;
-
-	dev_dbg(u3d->dev, "%s: 0x%x\n", __func__, u3d->dev_addr);
-
-	if (u3d->dev_addr > 127) {
-		dev_err(u3d->dev,
-			"%s, u3d address is wrong (out of range)\n", __func__);
-		u3d->dev_addr = 0;
-		goto err;
-	}
-
-	/* update usb state */
-	u3d->usb_state = USB_STATE_ADDRESS;
-
-	/* set the new address */
-	tmp = ioread32(&u3d->vuc_regs->devaddrtiebrkr);
-	tmp &= ~0x7F;
-	tmp |= (u32)u3d->dev_addr;
-	iowrite32(tmp, &u3d->vuc_regs->devaddrtiebrkr);
-
-	return;
-err:
-	mv_u3d_ep0_stall(u3d);
-}
-
-static int mv_u3d_is_set_configuration(struct usb_ctrlrequest *setup)
-{
-	if ((setup->bRequestType & USB_TYPE_MASK) == USB_TYPE_STANDARD)
-		if (setup->bRequest == USB_REQ_SET_CONFIGURATION)
-			return 1;
-
-	return 0;
-}
-
-static void mv_u3d_handle_setup_packet(struct mv_u3d *u3d, u8 ep_num,
-	struct usb_ctrlrequest *setup)
-	__releases(&u3c->lock)
-	__acquires(&u3c->lock)
-{
-	bool delegate = false;
-
-	mv_u3d_nuke(&u3d->eps[ep_num * 2 + MV_U3D_EP_DIR_IN], -ESHUTDOWN);
-
-	dev_dbg(u3d->dev, "SETUP %02x.%02x v%04x i%04x l%04x\n",
-			setup->bRequestType, setup->bRequest,
-			setup->wValue, setup->wIndex, setup->wLength);
-
-	/* We process some stardard setup requests here */
-	if ((setup->bRequestType & USB_TYPE_MASK) == USB_TYPE_STANDARD) {
-		switch (setup->bRequest) {
-		case USB_REQ_GET_STATUS:
-			delegate = true;
-			break;
-
-		case USB_REQ_SET_ADDRESS:
-			mv_u3d_ch9setaddress(u3d, setup);
-			break;
-
-		case USB_REQ_CLEAR_FEATURE:
-			delegate = true;
-			break;
-
-		case USB_REQ_SET_FEATURE:
-			delegate = true;
-			break;
-
-		default:
-			delegate = true;
-		}
-	} else
-		delegate = true;
-
-	/* delegate USB standard requests to the gadget driver */
-	if (delegate == true) {
-		/* USB requests handled by gadget */
-		if (setup->wLength) {
-			/* DATA phase from gadget, STATUS phase from u3d */
-			u3d->ep0_dir = (setup->bRequestType & USB_DIR_IN)
-					? MV_U3D_EP_DIR_IN : MV_U3D_EP_DIR_OUT;
-			spin_unlock(&u3d->lock);
-			if (u3d->driver->setup(&u3d->gadget,
-				&u3d->local_setup_buff) < 0) {
-				dev_err(u3d->dev, "setup error!\n");
-				mv_u3d_ep0_stall(u3d);
-			}
-			spin_lock(&u3d->lock);
-		} else {
-			/* no DATA phase, STATUS phase from gadget */
-			u3d->ep0_dir = MV_U3D_EP_DIR_IN;
-			u3d->ep0_state = MV_U3D_STATUS_STAGE;
-			spin_unlock(&u3d->lock);
-			if (u3d->driver->setup(&u3d->gadget,
-				&u3d->local_setup_buff) < 0)
-				mv_u3d_ep0_stall(u3d);
-			spin_lock(&u3d->lock);
-		}
-
-		if (mv_u3d_is_set_configuration(setup)) {
-			dev_dbg(u3d->dev, "u3d configured\n");
-			u3d->usb_state = USB_STATE_CONFIGURED;
-		}
-	}
-}
-
-static void mv_u3d_get_setup_data(struct mv_u3d *u3d, u8 ep_num, u8 *buffer_ptr)
-{
-	struct mv_u3d_ep_context *epcontext;
-
-	epcontext = &u3d->ep_context[ep_num * 2 + MV_U3D_EP_DIR_IN];
-
-	/* Copy the setup packet to local buffer */
-	memcpy(buffer_ptr, (u8 *) &epcontext->setup_buffer, 8);
-}
-
-static void mv_u3d_irq_process_setup(struct mv_u3d *u3d)
-{
-	u32 tmp, i;
-	/* Process all Setup packet received interrupts */
-	tmp = ioread32(&u3d->vuc_regs->setuplock);
-	if (tmp) {
-		for (i = 0; i < u3d->max_eps; i++) {
-			if (tmp & (1 << i)) {
-				mv_u3d_get_setup_data(u3d, i,
-					(u8 *)(&u3d->local_setup_buff));
-				mv_u3d_handle_setup_packet(u3d, i,
-					&u3d->local_setup_buff);
-			}
-		}
-	}
-
-	iowrite32(tmp, &u3d->vuc_regs->setuplock);
-}
-
-static void mv_u3d_irq_process_tr_complete(struct mv_u3d *u3d)
-{
-	u32 tmp, bit_pos;
-	int i, ep_num = 0, direction = 0;
-	struct mv_u3d_ep	*curr_ep;
-	struct mv_u3d_req *curr_req, *temp_req;
-	int status;
-
-	tmp = ioread32(&u3d->vuc_regs->endcomplete);
-
-	dev_dbg(u3d->dev, "tr_complete: ep: 0x%x\n", tmp);
-	if (!tmp)
-		return;
-	iowrite32(tmp, &u3d->vuc_regs->endcomplete);
-
-	for (i = 0; i < u3d->max_eps * 2; i++) {
-		ep_num = i >> 1;
-		direction = i % 2;
-
-		bit_pos = 1 << (ep_num + 16 * direction);
-
-		if (!(bit_pos & tmp))
-			continue;
-
-		if (i == 0)
-			curr_ep = &u3d->eps[1];
-		else
-			curr_ep = &u3d->eps[i];
-
-		/* remove req out of ep request list after completion */
-		dev_dbg(u3d->dev, "tr comp: check req_list\n");
-		spin_lock(&curr_ep->req_lock);
-		if (!list_empty(&curr_ep->req_list)) {
-			struct mv_u3d_req *req;
-			req = list_entry(curr_ep->req_list.next,
-						struct mv_u3d_req, list);
-			list_del_init(&req->list);
-			curr_ep->processing = 0;
-		}
-		spin_unlock(&curr_ep->req_lock);
-
-		/* process the req queue until an uncomplete request */
-		list_for_each_entry_safe(curr_req, temp_req,
-			&curr_ep->queue, queue) {
-			status = mv_u3d_process_ep_req(u3d, i, curr_req);
-			if (status)
-				break;
-			/* write back status to req */
-			curr_req->req.status = status;
-
-			/* ep0 request completion */
-			if (ep_num == 0) {
-				mv_u3d_done(curr_ep, curr_req, 0);
-				break;
-			} else {
-				mv_u3d_done(curr_ep, curr_req, status);
-			}
-		}
-
-		dev_dbg(u3d->dev, "call mv_u3d_start_queue from ep complete\n");
-		mv_u3d_start_queue(curr_ep);
-	}
-}
-
-static irqreturn_t mv_u3d_irq(int irq, void *dev)
-{
-	struct mv_u3d *u3d = (struct mv_u3d *)dev;
-	u32 status, intr;
-	u32 bridgesetting;
-	u32 trbunderrun;
-
-	spin_lock(&u3d->lock);
-
-	status = ioread32(&u3d->vuc_regs->intrcause);
-	intr = ioread32(&u3d->vuc_regs->intrenable);
-	status &= intr;
-
-	if (status == 0) {
-		spin_unlock(&u3d->lock);
-		dev_err(u3d->dev, "irq error!\n");
-		return IRQ_NONE;
-	}
-
-	if (status & MV_U3D_USBINT_VBUS_VALID) {
-		bridgesetting = ioread32(&u3d->vuc_regs->bridgesetting);
-		if (bridgesetting & MV_U3D_BRIDGE_SETTING_VBUS_VALID) {
-			/* write vbus valid bit of bridge setting to clear */
-			bridgesetting = MV_U3D_BRIDGE_SETTING_VBUS_VALID;
-			iowrite32(bridgesetting, &u3d->vuc_regs->bridgesetting);
-			dev_dbg(u3d->dev, "vbus valid\n");
-
-			u3d->usb_state = USB_STATE_POWERED;
-			u3d->vbus_valid_detect = 0;
-			/* if external vbus detect is not supported,
-			 * we handle it here.
-			 */
-			if (!u3d->vbus) {
-				spin_unlock(&u3d->lock);
-				mv_u3d_vbus_session(&u3d->gadget, 1);
-				spin_lock(&u3d->lock);
-			}
-		} else
-			dev_err(u3d->dev, "vbus bit is not set\n");
-	}
-
-	/* RX data is already in the 16KB FIFO.*/
-	if (status & MV_U3D_USBINT_UNDER_RUN) {
-		trbunderrun = ioread32(&u3d->vuc_regs->trbunderrun);
-		dev_err(u3d->dev, "under run, ep%d\n", trbunderrun);
-		iowrite32(trbunderrun, &u3d->vuc_regs->trbunderrun);
-		mv_u3d_irq_process_error(u3d);
-	}
-
-	if (status & (MV_U3D_USBINT_RXDESC_ERR | MV_U3D_USBINT_TXDESC_ERR)) {
-		/* write one to clear */
-		iowrite32(status & (MV_U3D_USBINT_RXDESC_ERR
-			| MV_U3D_USBINT_TXDESC_ERR),
-			&u3d->vuc_regs->intrcause);
-		dev_err(u3d->dev, "desc err 0x%x\n", status);
-		mv_u3d_irq_process_error(u3d);
-	}
-
-	if (status & MV_U3D_USBINT_LINK_CHG)
-		mv_u3d_irq_process_link_change(u3d);
-
-	if (status & MV_U3D_USBINT_TX_COMPLETE)
-		mv_u3d_irq_process_tr_complete(u3d);
-
-	if (status & MV_U3D_USBINT_RX_COMPLETE)
-		mv_u3d_irq_process_tr_complete(u3d);
-
-	if (status & MV_U3D_USBINT_SETUP)
-		mv_u3d_irq_process_setup(u3d);
-
-	spin_unlock(&u3d->lock);
-	return IRQ_HANDLED;
-}
-
-static int mv_u3d_remove(struct platform_device *dev)
-{
-	struct mv_u3d *u3d = platform_get_drvdata(dev);
-
-	BUG_ON(u3d == NULL);
-
-	usb_del_gadget_udc(&u3d->gadget);
-
-	/* free memory allocated in probe */
-	if (u3d->trb_pool)
-		dma_pool_destroy(u3d->trb_pool);
-
-	if (u3d->ep_context)
-		dma_free_coherent(&dev->dev, u3d->ep_context_size,
-			u3d->ep_context, u3d->ep_context_dma);
-
-	kfree(u3d->eps);
-
-	if (u3d->irq)
-		free_irq(u3d->irq, u3d);
-
-	if (u3d->cap_regs)
-		iounmap(u3d->cap_regs);
-	u3d->cap_regs = NULL;
-
-	kfree(u3d->status_req);
-
-	clk_put(u3d->clk);
-
-	kfree(u3d);
-
-	return 0;
-}
-
-static int mv_u3d_probe(struct platform_device *dev)
-{
-	struct mv_u3d *u3d = NULL;
-	struct mv_usb_platform_data *pdata = dev_get_platdata(&dev->dev);
-	int retval = 0;
-	struct resource *r;
-	size_t size;
-
-	if (!dev_get_platdata(&dev->dev)) {
-		dev_err(&dev->dev, "missing platform_data\n");
-		retval = -ENODEV;
-		goto err_pdata;
-	}
-
-	u3d = kzalloc(sizeof(*u3d), GFP_KERNEL);
-	if (!u3d) {
-		retval = -ENOMEM;
-		goto err_alloc_private;
-	}
-
-	spin_lock_init(&u3d->lock);
-
-	platform_set_drvdata(dev, u3d);
-
-	u3d->dev = &dev->dev;
-	u3d->vbus = pdata->vbus;
-
-	u3d->clk = clk_get(&dev->dev, NULL);
-	if (IS_ERR(u3d->clk)) {
-		retval = PTR_ERR(u3d->clk);
-		goto err_get_clk;
-	}
-
-	r = platform_get_resource_byname(dev, IORESOURCE_MEM, "capregs");
-	if (!r) {
-		dev_err(&dev->dev, "no I/O memory resource defined\n");
-		retval = -ENODEV;
-		goto err_get_cap_regs;
-	}
-
-	u3d->cap_regs = (struct mv_u3d_cap_regs __iomem *)
-		ioremap(r->start, resource_size(r));
-	if (!u3d->cap_regs) {
-		dev_err(&dev->dev, "failed to map I/O memory\n");
-		retval = -EBUSY;
-		goto err_map_cap_regs;
-	} else {
-		dev_dbg(&dev->dev, "cap_regs address: 0x%lx/0x%lx\n",
-			(unsigned long) r->start,
-			(unsigned long) u3d->cap_regs);
-	}
-
-	/* we will access controller register, so enable the u3d controller */
-	clk_enable(u3d->clk);
-
-	if (pdata->phy_init) {
-		retval = pdata->phy_init(u3d->phy_regs);
-		if (retval) {
-			dev_err(&dev->dev, "init phy error %d\n", retval);
-			goto err_u3d_enable;
-		}
-	}
-
-	u3d->op_regs = (struct mv_u3d_op_regs __iomem *)(u3d->cap_regs
-		+ MV_U3D_USB3_OP_REGS_OFFSET);
-
-	u3d->vuc_regs = (struct mv_u3d_vuc_regs __iomem *)(u3d->cap_regs
-		+ ioread32(&u3d->cap_regs->vuoff));
-
-	u3d->max_eps = 16;
-
-	/*
-	 * some platform will use usb to download image, it may not disconnect
-	 * usb gadget before loading kernel. So first stop u3d here.
-	 */
-	mv_u3d_controller_stop(u3d);
-	iowrite32(0xFFFFFFFF, &u3d->vuc_regs->intrcause);
-
-	if (pdata->phy_deinit)
-		pdata->phy_deinit(u3d->phy_regs);
-	clk_disable(u3d->clk);
-
-	size = u3d->max_eps * sizeof(struct mv_u3d_ep_context) * 2;
-	size = (size + MV_U3D_EP_CONTEXT_ALIGNMENT - 1)
-		& ~(MV_U3D_EP_CONTEXT_ALIGNMENT - 1);
-	u3d->ep_context = dma_alloc_coherent(&dev->dev, size,
-					&u3d->ep_context_dma, GFP_KERNEL);
-	if (!u3d->ep_context) {
-		dev_err(&dev->dev, "allocate ep context memory failed\n");
-		retval = -ENOMEM;
-		goto err_alloc_ep_context;
-	}
-	u3d->ep_context_size = size;
-
-	/* create TRB dma_pool resource */
-	u3d->trb_pool = dma_pool_create("u3d_trb",
-			&dev->dev,
-			sizeof(struct mv_u3d_trb_hw),
-			MV_U3D_TRB_ALIGNMENT,
-			MV_U3D_DMA_BOUNDARY);
-
-	if (!u3d->trb_pool) {
-		retval = -ENOMEM;
-		goto err_alloc_trb_pool;
-	}
-
-	size = u3d->max_eps * sizeof(struct mv_u3d_ep) * 2;
-	u3d->eps = kzalloc(size, GFP_KERNEL);
-	if (!u3d->eps) {
-		retval = -ENOMEM;
-		goto err_alloc_eps;
-	}
-
-	/* initialize ep0 status request structure */
-	u3d->status_req = kzalloc(sizeof(struct mv_u3d_req) + 8, GFP_KERNEL);
-	if (!u3d->status_req) {
-		retval = -ENOMEM;
-		goto err_alloc_status_req;
-	}
-	INIT_LIST_HEAD(&u3d->status_req->queue);
-
-	/* allocate a small amount of memory to get valid address */
-	u3d->status_req->req.buf = (char *)u3d->status_req
-					+ sizeof(struct mv_u3d_req);
-	u3d->status_req->req.dma = virt_to_phys(u3d->status_req->req.buf);
-
-	u3d->resume_state = USB_STATE_NOTATTACHED;
-	u3d->usb_state = USB_STATE_ATTACHED;
-	u3d->ep0_dir = MV_U3D_EP_DIR_OUT;
-	u3d->remote_wakeup = 0;
-
-	r = platform_get_resource(dev, IORESOURCE_IRQ, 0);
-	if (!r) {
-		dev_err(&dev->dev, "no IRQ resource defined\n");
-		retval = -ENODEV;
-		goto err_get_irq;
-	}
-	u3d->irq = r->start;
-	if (request_irq(u3d->irq, mv_u3d_irq,
-		IRQF_SHARED, driver_name, u3d)) {
-		u3d->irq = 0;
-		dev_err(&dev->dev, "Request irq %d for u3d failed\n",
-			u3d->irq);
-		retval = -ENODEV;
-		goto err_request_irq;
-	}
-
-	/* initialize gadget structure */
-	u3d->gadget.ops = &mv_u3d_ops;	/* usb_gadget_ops */
-	u3d->gadget.ep0 = &u3d->eps[1].ep;	/* gadget ep0 */
-	INIT_LIST_HEAD(&u3d->gadget.ep_list);	/* ep_list */
-	u3d->gadget.speed = USB_SPEED_UNKNOWN;	/* speed */
-
-	/* the "gadget" abstracts/virtualizes the controller */
-	u3d->gadget.name = driver_name;		/* gadget name */
-
-	mv_u3d_eps_init(u3d);
-
-	/* external vbus detection */
-	if (u3d->vbus) {
-		u3d->clock_gating = 1;
-		dev_err(&dev->dev, "external vbus detection\n");
-	}
-
-	if (!u3d->clock_gating)
-		u3d->vbus_active = 1;
-
-	/* enable usb3 controller vbus detection */
-	u3d->vbus_valid_detect = 1;
-
-	retval = usb_add_gadget_udc(&dev->dev, &u3d->gadget);
-	if (retval)
-		goto err_unregister;
-
-	dev_dbg(&dev->dev, "successful probe usb3 device %s clock gating.\n",
-		u3d->clock_gating ? "with" : "without");
-
-	return 0;
-
-err_unregister:
-	free_irq(u3d->irq, u3d);
-err_request_irq:
-err_get_irq:
-	kfree(u3d->status_req);
-err_alloc_status_req:
-	kfree(u3d->eps);
-err_alloc_eps:
-	dma_pool_destroy(u3d->trb_pool);
-err_alloc_trb_pool:
-	dma_free_coherent(&dev->dev, u3d->ep_context_size,
-		u3d->ep_context, u3d->ep_context_dma);
-err_alloc_ep_context:
-	if (pdata->phy_deinit)
-		pdata->phy_deinit(u3d->phy_regs);
-	clk_disable(u3d->clk);
-err_u3d_enable:
-	iounmap(u3d->cap_regs);
-err_map_cap_regs:
-err_get_cap_regs:
-err_get_clk:
-	clk_put(u3d->clk);
-	kfree(u3d);
-err_alloc_private:
-err_pdata:
-	return retval;
-}
-
-#ifdef CONFIG_PM_SLEEP
-static int mv_u3d_suspend(struct device *dev)
-{
-	struct mv_u3d *u3d = dev_get_drvdata(dev);
-
-	/*
-	 * only cable is unplugged, usb can suspend.
-	 * So do not care about clock_gating == 1, it is handled by
-	 * vbus session.
-	 */
-	if (!u3d->clock_gating) {
-		mv_u3d_controller_stop(u3d);
-
-		spin_lock_irq(&u3d->lock);
-		/* stop all usb activities */
-		mv_u3d_stop_activity(u3d, u3d->driver);
-		spin_unlock_irq(&u3d->lock);
-
-		mv_u3d_disable(u3d);
-	}
-
-	return 0;
-}
-
-static int mv_u3d_resume(struct device *dev)
-{
-	struct mv_u3d *u3d = dev_get_drvdata(dev);
-	int retval;
-
-	if (!u3d->clock_gating) {
-		retval = mv_u3d_enable(u3d);
-		if (retval)
-			return retval;
-
-		if (u3d->driver && u3d->softconnect) {
-			mv_u3d_controller_reset(u3d);
-			mv_u3d_ep0_reset(u3d);
-			mv_u3d_controller_start(u3d);
-		}
-	}
-
-	return 0;
-}
-#endif
-
-static SIMPLE_DEV_PM_OPS(mv_u3d_pm_ops, mv_u3d_suspend, mv_u3d_resume);
-
-static void mv_u3d_shutdown(struct platform_device *dev)
-{
-	struct mv_u3d *u3d = platform_get_drvdata(dev);
-	u32 tmp;
-
-	tmp = ioread32(&u3d->op_regs->usbcmd);
-	tmp &= ~MV_U3D_CMD_RUN_STOP;
-	iowrite32(tmp, &u3d->op_regs->usbcmd);
-}
-
-static struct platform_driver mv_u3d_driver = {
-	.probe		= mv_u3d_probe,
-	.remove		= mv_u3d_remove,
-	.shutdown	= mv_u3d_shutdown,
-	.driver		= {
-		.owner	= THIS_MODULE,
-		.name	= "mv-u3d",
-		.pm	= &mv_u3d_pm_ops,
-	},
-};
-
-module_platform_driver(mv_u3d_driver);
-MODULE_ALIAS("platform:mv-u3d");
-MODULE_DESCRIPTION(DRIVER_DESC);
-MODULE_AUTHOR("Yu Xu <yuxu@marvell.com>");
-MODULE_LICENSE("GPL");