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, 3038 deletions

diff --git a/drivers/usb/gadget/omap_udc.c b/drivers/usb/gadget/omap_udc.c
deleted file mode 100644
index e731373fd4d7..000000000000
--- a/drivers/usb/gadget/omap_udc.c
+++ /dev/null
@@ -1,3038 +0,0 @@
-/*
- * omap_udc.c -- for OMAP full speed udc; most chips support OTG.
- *
- * Copyright (C) 2004 Texas Instruments, Inc.
- * Copyright (C) 2004-2005 David Brownell
- *
- * OMAP2 & DMA support by Kyungmin Park <kyungmin.park@samsung.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- */
-
-#undef	DEBUG
-#undef	VERBOSE
-
-#include <linux/module.h>
-#include <linux/kernel.h>
-#include <linux/ioport.h>
-#include <linux/types.h>
-#include <linux/errno.h>
-#include <linux/delay.h>
-#include <linux/slab.h>
-#include <linux/timer.h>
-#include <linux/list.h>
-#include <linux/interrupt.h>
-#include <linux/proc_fs.h>
-#include <linux/mm.h>
-#include <linux/moduleparam.h>
-#include <linux/platform_device.h>
-#include <linux/usb/ch9.h>
-#include <linux/usb/gadget.h>
-#include <linux/usb/otg.h>
-#include <linux/dma-mapping.h>
-#include <linux/clk.h>
-#include <linux/err.h>
-#include <linux/prefetch.h>
-#include <linux/io.h>
-
-#include <asm/byteorder.h>
-#include <asm/irq.h>
-#include <asm/unaligned.h>
-#include <asm/mach-types.h>
-
-#include <linux/omap-dma.h>
-
-#include <mach/usb.h>
-
-#include "omap_udc.h"
-
-#undef	USB_TRACE
-
-/* bulk DMA seems to be behaving for both IN and OUT */
-#define	USE_DMA
-
-/* ISO too */
-#define	USE_ISO
-
-#define	DRIVER_DESC	"OMAP UDC driver"
-#define	DRIVER_VERSION	"4 October 2004"
-
-#define OMAP_DMA_USB_W2FC_TX0		29
-#define OMAP_DMA_USB_W2FC_RX0		26
-
-/*
- * The OMAP UDC needs _very_ early endpoint setup:  before enabling the
- * D+ pullup to allow enumeration.  That's too early for the gadget
- * framework to use from usb_endpoint_enable(), which happens after
- * enumeration as part of activating an interface.  (But if we add an
- * optional new "UDC not yet running" state to the gadget driver model,
- * even just during driver binding, the endpoint autoconfig logic is the
- * natural spot to manufacture new endpoints.)
- *
- * So instead of using endpoint enable calls to control the hardware setup,
- * this driver defines a "fifo mode" parameter.  It's used during driver
- * initialization to choose among a set of pre-defined endpoint configs.
- * See omap_udc_setup() for available modes, or to add others.  That code
- * lives in an init section, so use this driver as a module if you need
- * to change the fifo mode after the kernel boots.
- *
- * Gadget drivers normally ignore endpoints they don't care about, and
- * won't include them in configuration descriptors.  That means only
- * misbehaving hosts would even notice they exist.
- */
-#ifdef	USE_ISO
-static unsigned fifo_mode = 3;
-#else
-static unsigned fifo_mode;
-#endif
-
-/* "modprobe omap_udc fifo_mode=42", or else as a kernel
- * boot parameter "omap_udc:fifo_mode=42"
- */
-module_param(fifo_mode, uint, 0);
-MODULE_PARM_DESC(fifo_mode, "endpoint configuration");
-
-#ifdef	USE_DMA
-static bool use_dma = 1;
-
-/* "modprobe omap_udc use_dma=y", or else as a kernel
- * boot parameter "omap_udc:use_dma=y"
- */
-module_param(use_dma, bool, 0);
-MODULE_PARM_DESC(use_dma, "enable/disable DMA");
-#else	/* !USE_DMA */
-
-/* save a bit of code */
-#define	use_dma		0
-#endif	/* !USE_DMA */
-
-
-static const char driver_name[] = "omap_udc";
-static const char driver_desc[] = DRIVER_DESC;
-
-/*-------------------------------------------------------------------------*/
-
-/* there's a notion of "current endpoint" for modifying endpoint
- * state, and PIO access to its FIFO.
- */
-
-static void use_ep(struct omap_ep *ep, u16 select)
-{
-	u16	num = ep->bEndpointAddress & 0x0f;
-
-	if (ep->bEndpointAddress & USB_DIR_IN)
-		num |= UDC_EP_DIR;
-	omap_writew(num | select, UDC_EP_NUM);
-	/* when select, MUST deselect later !! */
-}
-
-static inline void deselect_ep(void)
-{
-	u16 w;
-
-	w = omap_readw(UDC_EP_NUM);
-	w &= ~UDC_EP_SEL;
-	omap_writew(w, UDC_EP_NUM);
-	/* 6 wait states before TX will happen */
-}
-
-static void dma_channel_claim(struct omap_ep *ep, unsigned preferred);
-
-/*-------------------------------------------------------------------------*/
-
-static int omap_ep_enable(struct usb_ep *_ep,
-		const struct usb_endpoint_descriptor *desc)
-{
-	struct omap_ep	*ep = container_of(_ep, struct omap_ep, ep);
-	struct omap_udc	*udc;
-	unsigned long	flags;
-	u16		maxp;
-
-	/* catch various bogus parameters */
-	if (!_ep || !desc
-			|| desc->bDescriptorType != USB_DT_ENDPOINT
-			|| ep->bEndpointAddress != desc->bEndpointAddress
-			|| ep->maxpacket < usb_endpoint_maxp(desc)) {
-		DBG("%s, bad ep or descriptor\n", __func__);
-		return -EINVAL;
-	}
-	maxp = usb_endpoint_maxp(desc);
-	if ((desc->bmAttributes == USB_ENDPOINT_XFER_BULK
-				&& maxp != ep->maxpacket)
-			|| usb_endpoint_maxp(desc) > ep->maxpacket
-			|| !desc->wMaxPacketSize) {
-		DBG("%s, bad %s maxpacket\n", __func__, _ep->name);
-		return -ERANGE;
-	}
-
-#ifdef	USE_ISO
-	if ((desc->bmAttributes == USB_ENDPOINT_XFER_ISOC
-				&& desc->bInterval != 1)) {
-		/* hardware wants period = 1; USB allows 2^(Interval-1) */
-		DBG("%s, unsupported ISO period %dms\n", _ep->name,
-				1 << (desc->bInterval - 1));
-		return -EDOM;
-	}
-#else
-	if (desc->bmAttributes == USB_ENDPOINT_XFER_ISOC) {
-		DBG("%s, ISO nyet\n", _ep->name);
-		return -EDOM;
-	}
-#endif
-
-	/* xfer types must match, except that interrupt ~= bulk */
-	if (ep->bmAttributes != desc->bmAttributes
-			&& ep->bmAttributes != USB_ENDPOINT_XFER_BULK
-			&& desc->bmAttributes != USB_ENDPOINT_XFER_INT) {
-		DBG("%s, %s type mismatch\n", __func__, _ep->name);
-		return -EINVAL;
-	}
-
-	udc = ep->udc;
-	if (!udc->driver || udc->gadget.speed == USB_SPEED_UNKNOWN) {
-		DBG("%s, bogus device state\n", __func__);
-		return -ESHUTDOWN;
-	}
-
-	spin_lock_irqsave(&udc->lock, flags);
-
-	ep->ep.desc = desc;
-	ep->irqs = 0;
-	ep->stopped = 0;
-	ep->ep.maxpacket = maxp;
-
-	/* set endpoint to initial state */
-	ep->dma_channel = 0;
-	ep->has_dma = 0;
-	ep->lch = -1;
-	use_ep(ep, UDC_EP_SEL);
-	omap_writew(udc->clr_halt, UDC_CTRL);
-	ep->ackwait = 0;
-	deselect_ep();
-
-	if (ep->bmAttributes == USB_ENDPOINT_XFER_ISOC)
-		list_add(&ep->iso, &udc->iso);
-
-	/* maybe assign a DMA channel to this endpoint */
-	if (use_dma && desc->bmAttributes == USB_ENDPOINT_XFER_BULK)
-		/* FIXME ISO can dma, but prefers first channel */
-		dma_channel_claim(ep, 0);
-
-	/* PIO OUT may RX packets */
-	if (desc->bmAttributes != USB_ENDPOINT_XFER_ISOC
-			&& !ep->has_dma
-			&& !(ep->bEndpointAddress & USB_DIR_IN)) {
-		omap_writew(UDC_SET_FIFO_EN, UDC_CTRL);
-		ep->ackwait = 1 + ep->double_buf;
-	}
-
-	spin_unlock_irqrestore(&udc->lock, flags);
-	VDBG("%s enabled\n", _ep->name);
-	return 0;
-}
-
-static void nuke(struct omap_ep *, int status);
-
-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->ep.desc) {
-		DBG("%s, %s not enabled\n", __func__,
-			_ep ? ep->ep.name : NULL);
-		return -EINVAL;
-	}
-
-	spin_lock_irqsave(&ep->udc->lock, flags);
-	ep->ep.desc = NULL;
-	nuke(ep, -ESHUTDOWN);
-	ep->ep.maxpacket = ep->maxpacket;
-	ep->has_dma = 0;
-	omap_writew(UDC_SET_HALT, UDC_CTRL);
-	list_del_init(&ep->iso);
-	del_timer(&ep->timer);
-
-	spin_unlock_irqrestore(&ep->udc->lock, flags);
-
-	VDBG("%s disabled\n", _ep->name);
-	return 0;
-}
-
-/*-------------------------------------------------------------------------*/
-
-static struct usb_request *
-omap_alloc_request(struct usb_ep *ep, gfp_t gfp_flags)
-{
-	struct omap_req	*req;
-
-	req = kzalloc(sizeof(*req), gfp_flags);
-	if (!req)
-		return NULL;
-
-	INIT_LIST_HEAD(&req->queue);
-
-	return &req->req;
-}
-
-static void
-omap_free_request(struct usb_ep *ep, struct usb_request *_req)
-{
-	struct omap_req	*req = container_of(_req, struct omap_req, req);
-
-	kfree(req);
-}
-
-/*-------------------------------------------------------------------------*/
-
-static void
-done(struct omap_ep *ep, struct omap_req *req, int status)
-{
-	struct omap_udc		*udc = ep->udc;
-	unsigned		stopped = ep->stopped;
-
-	list_del_init(&req->queue);
-
-	if (req->req.status == -EINPROGRESS)
-		req->req.status = status;
-	else
-		status = req->req.status;
-
-	if (use_dma && ep->has_dma)
-		usb_gadget_unmap_request(&udc->gadget, &req->req,
-				(ep->bEndpointAddress & USB_DIR_IN));
-
-#ifndef	USB_TRACE
-	if (status && status != -ESHUTDOWN)
-#endif
-		VDBG("complete %s req %p stat %d len %u/%u\n",
-			ep->ep.name, &req->req, status,
-			req->req.actual, req->req.length);
-
-	/* don't modify queue heads during completion callback */
-	ep->stopped = 1;
-	spin_unlock(&ep->udc->lock);
-	req->req.complete(&ep->ep, &req->req);
-	spin_lock(&ep->udc->lock);
-	ep->stopped = stopped;
-}
-
-/*-------------------------------------------------------------------------*/
-
-#define UDC_FIFO_FULL		(UDC_NON_ISO_FIFO_FULL | UDC_ISO_FIFO_FULL)
-#define UDC_FIFO_UNWRITABLE	(UDC_EP_HALTED | UDC_FIFO_FULL)
-
-#define FIFO_EMPTY	(UDC_NON_ISO_FIFO_EMPTY | UDC_ISO_FIFO_EMPTY)
-#define FIFO_UNREADABLE (UDC_EP_HALTED | FIFO_EMPTY)
-
-static inline int
-write_packet(u8 *buf, struct omap_req *req, unsigned max)
-{
-	unsigned	len;
-	u16		*wp;
-
-	len = min(req->req.length - req->req.actual, max);
-	req->req.actual += len;
-
-	max = len;
-	if (likely((((int)buf) & 1) == 0)) {
-		wp = (u16 *)buf;
-		while (max >= 2) {
-			omap_writew(*wp++, UDC_DATA);
-			max -= 2;
-		}
-		buf = (u8 *)wp;
-	}
-	while (max--)
-		omap_writeb(*buf++, UDC_DATA);
-	return len;
-}
-
-/* FIXME change r/w fifo calling convention */
-
-
-/* return:  0 = still running, 1 = completed, negative = errno */
-static int write_fifo(struct omap_ep *ep, struct omap_req *req)
-{
-	u8		*buf;
-	unsigned	count;
-	int		is_last;
-	u16		ep_stat;
-
-	buf = req->req.buf + req->req.actual;
-	prefetch(buf);
-
-	/* PIO-IN isn't double buffered except for iso */
-	ep_stat = omap_readw(UDC_STAT_FLG);
-	if (ep_stat & UDC_FIFO_UNWRITABLE)
-		return 0;
-
-	count = ep->ep.maxpacket;
-	count = write_packet(buf, req, count);
-	omap_writew(UDC_SET_FIFO_EN, UDC_CTRL);
-	ep->ackwait = 1;
-
-	/* last packet is often short (sometimes a zlp) */
-	if (count != ep->ep.maxpacket)
-		is_last = 1;
-	else if (req->req.length == req->req.actual
-			&& !req->req.zero)
-		is_last = 1;
-	else
-		is_last = 0;
-
-	/* NOTE:  requests complete when all IN data is in a
-	 * FIFO (or sometimes later, if a zlp was needed).
-	 * Use usb_ep_fifo_status() where needed.
-	 */
-	if (is_last)
-		done(ep, req, 0);
-	return is_last;
-}
-
-static inline int
-read_packet(u8 *buf, struct omap_req *req, unsigned avail)
-{
-	unsigned	len;
-	u16		*wp;
-
-	len = min(req->req.length - req->req.actual, avail);
-	req->req.actual += len;
-	avail = len;
-
-	if (likely((((int)buf) & 1) == 0)) {
-		wp = (u16 *)buf;
-		while (avail >= 2) {
-			*wp++ = omap_readw(UDC_DATA);
-			avail -= 2;
-		}
-		buf = (u8 *)wp;
-	}
-	while (avail--)
-		*buf++ = omap_readb(UDC_DATA);
-	return len;
-}
-
-/* return:  0 = still running, 1 = queue empty, negative = errno */
-static int read_fifo(struct omap_ep *ep, struct omap_req *req)
-{
-	u8		*buf;
-	unsigned	count, avail;
-	int		is_last;
-
-	buf = req->req.buf + req->req.actual;
-	prefetchw(buf);
-
-	for (;;) {
-		u16	ep_stat = omap_readw(UDC_STAT_FLG);
-
-		is_last = 0;
-		if (ep_stat & FIFO_EMPTY) {
-			if (!ep->double_buf)
-				break;
-			ep->fnf = 1;
-		}
-		if (ep_stat & UDC_EP_HALTED)
-			break;
-
-		if (ep_stat & UDC_FIFO_FULL)
-			avail = ep->ep.maxpacket;
-		else  {
-			avail = omap_readw(UDC_RXFSTAT);
-			ep->fnf = ep->double_buf;
-		}
-		count = read_packet(buf, req, avail);
-
-		/* partial packet reads may not be errors */
-		if (count < ep->ep.maxpacket) {
-			is_last = 1;
-			/* overflowed this request?  flush extra data */
-			if (count != avail) {
-				req->req.status = -EOVERFLOW;
-				avail -= count;
-				while (avail--)
-					omap_readw(UDC_DATA);
-			}
-		} else if (req->req.length == req->req.actual)
-			is_last = 1;
-		else
-			is_last = 0;
-
-		if (!ep->bEndpointAddress)
-			break;
-		if (is_last)
-			done(ep, req, 0);
-		break;
-	}
-	return is_last;
-}
-
-/*-------------------------------------------------------------------------*/
-
-static u16 dma_src_len(struct omap_ep *ep, dma_addr_t start)
-{
-	dma_addr_t	end;
-
-	/* IN-DMA needs this on fault/cancel paths, so 15xx misreports
-	 * the last transfer's bytecount by more than a FIFO's worth.
-	 */
-	if (cpu_is_omap15xx())
-		return 0;
-
-	end = omap_get_dma_src_pos(ep->lch);
-	if (end == ep->dma_counter)
-		return 0;
-
-	end |= start & (0xffff << 16);
-	if (end < start)
-		end += 0x10000;
-	return end - start;
-}
-
-static u16 dma_dest_len(struct omap_ep *ep, dma_addr_t start)
-{
-	dma_addr_t	end;
-
-	end = omap_get_dma_dst_pos(ep->lch);
-	if (end == ep->dma_counter)
-		return 0;
-
-	end |= start & (0xffff << 16);
-	if (cpu_is_omap15xx())
-		end++;
-	if (end < start)
-		end += 0x10000;
-	return end - start;
-}
-
-
-/* Each USB transfer request using DMA maps to one or more DMA transfers.
- * When DMA completion isn't request completion, the UDC continues with
- * the next DMA transfer for that USB transfer.
- */
-
-static void next_in_dma(struct omap_ep *ep, struct omap_req *req)
-{
-	u16		txdma_ctrl, w;
-	unsigned	length = req->req.length - req->req.actual;
-	const int	sync_mode = cpu_is_omap15xx()
-				? OMAP_DMA_SYNC_FRAME
-				: OMAP_DMA_SYNC_ELEMENT;
-	int		dma_trigger = 0;
-
-	/* measure length in either bytes or packets */
-	if ((cpu_is_omap16xx() && length <= UDC_TXN_TSC)
-			|| (cpu_is_omap15xx() && length < ep->maxpacket)) {
-		txdma_ctrl = UDC_TXN_EOT | length;
-		omap_set_dma_transfer_params(ep->lch, OMAP_DMA_DATA_TYPE_S8,
-				length, 1, sync_mode, dma_trigger, 0);
-	} else {
-		length = min(length / ep->maxpacket,
-				(unsigned) UDC_TXN_TSC + 1);
-		txdma_ctrl = length;
-		omap_set_dma_transfer_params(ep->lch, OMAP_DMA_DATA_TYPE_S16,
-				ep->ep.maxpacket >> 1, length, sync_mode,
-				dma_trigger, 0);
-		length *= ep->maxpacket;
-	}
-	omap_set_dma_src_params(ep->lch, OMAP_DMA_PORT_EMIFF,
-		OMAP_DMA_AMODE_POST_INC, req->req.dma + req->req.actual,
-		0, 0);
-
-	omap_start_dma(ep->lch);
-	ep->dma_counter = omap_get_dma_src_pos(ep->lch);
-	w = omap_readw(UDC_DMA_IRQ_EN);
-	w |= UDC_TX_DONE_IE(ep->dma_channel);
-	omap_writew(w, UDC_DMA_IRQ_EN);
-	omap_writew(UDC_TXN_START | txdma_ctrl, UDC_TXDMA(ep->dma_channel));
-	req->dma_bytes = length;
-}
-
-static void finish_in_dma(struct omap_ep *ep, struct omap_req *req, int status)
-{
-	u16 w;
-
-	if (status == 0) {
-		req->req.actual += req->dma_bytes;
-
-		/* return if this request needs to send data or zlp */
-		if (req->req.actual < req->req.length)
-			return;
-		if (req->req.zero
-				&& req->dma_bytes != 0
-				&& (req->req.actual % ep->maxpacket) == 0)
-			return;
-	} else
-		req->req.actual += dma_src_len(ep, req->req.dma
-							+ req->req.actual);
-
-	/* tx completion */
-	omap_stop_dma(ep->lch);
-	w = omap_readw(UDC_DMA_IRQ_EN);
-	w &= ~UDC_TX_DONE_IE(ep->dma_channel);
-	omap_writew(w, UDC_DMA_IRQ_EN);
-	done(ep, req, status);
-}
-
-static void next_out_dma(struct omap_ep *ep, struct omap_req *req)
-{
-	unsigned packets = req->req.length - req->req.actual;
-	int dma_trigger = 0;
-	u16 w;
-
-	/* set up this DMA transfer, enable the fifo, start */
-	packets /= ep->ep.maxpacket;
-	packets = min(packets, (unsigned)UDC_RXN_TC + 1);
-	req->dma_bytes = packets * ep->ep.maxpacket;
-	omap_set_dma_transfer_params(ep->lch, OMAP_DMA_DATA_TYPE_S16,
-			ep->ep.maxpacket >> 1, packets,
-			OMAP_DMA_SYNC_ELEMENT,
-			dma_trigger, 0);
-	omap_set_dma_dest_params(ep->lch, OMAP_DMA_PORT_EMIFF,
-		OMAP_DMA_AMODE_POST_INC, req->req.dma + req->req.actual,
-		0, 0);
-	ep->dma_counter = omap_get_dma_dst_pos(ep->lch);
-
-	omap_writew(UDC_RXN_STOP | (packets - 1), UDC_RXDMA(ep->dma_channel));
-	w = omap_readw(UDC_DMA_IRQ_EN);
-	w |= UDC_RX_EOT_IE(ep->dma_channel);
-	omap_writew(w, UDC_DMA_IRQ_EN);
-	omap_writew(ep->bEndpointAddress & 0xf, UDC_EP_NUM);
-	omap_writew(UDC_SET_FIFO_EN, UDC_CTRL);
-
-	omap_start_dma(ep->lch);
-}
-
-static void
-finish_out_dma(struct omap_ep *ep, struct omap_req *req, int status, int one)
-{
-	u16	count, w;
-
-	if (status == 0)
-		ep->dma_counter = (u16) (req->req.dma + req->req.actual);
-	count = dma_dest_len(ep, req->req.dma + req->req.actual);
-	count += req->req.actual;
-	if (one)
-		count--;
-	if (count <= req->req.length)
-		req->req.actual = count;
-
-	if (count != req->dma_bytes || status)
-		omap_stop_dma(ep->lch);
-
-	/* if this wasn't short, request may need another transfer */
-	else if (req->req.actual < req->req.length)
-		return;
-
-	/* rx completion */
-	w = omap_readw(UDC_DMA_IRQ_EN);
-	w &= ~UDC_RX_EOT_IE(ep->dma_channel);
-	omap_writew(w, UDC_DMA_IRQ_EN);
-	done(ep, req, status);
-}
-
-static void dma_irq(struct omap_udc *udc, u16 irq_src)
-{
-	u16		dman_stat = omap_readw(UDC_DMAN_STAT);
-	struct omap_ep	*ep;
-	struct omap_req	*req;
-
-	/* IN dma: tx to host */
-	if (irq_src & UDC_TXN_DONE) {
-		ep = &udc->ep[16 + UDC_DMA_TX_SRC(dman_stat)];
-		ep->irqs++;
-		/* can see TXN_DONE after dma abort */
-		if (!list_empty(&ep->queue)) {
-			req = container_of(ep->queue.next,
-						struct omap_req, queue);
-			finish_in_dma(ep, req, 0);
-		}
-		omap_writew(UDC_TXN_DONE, UDC_IRQ_SRC);
-
-		if (!list_empty(&ep->queue)) {
-			req = container_of(ep->queue.next,
-					struct omap_req, queue);
-			next_in_dma(ep, req);
-		}
-	}
-
-	/* OUT dma: rx from host */
-	if (irq_src & UDC_RXN_EOT) {
-		ep = &udc->ep[UDC_DMA_RX_SRC(dman_stat)];
-		ep->irqs++;
-		/* can see RXN_EOT after dma abort */
-		if (!list_empty(&ep->queue)) {
-			req = container_of(ep->queue.next,
-					struct omap_req, queue);
-			finish_out_dma(ep, req, 0, dman_stat & UDC_DMA_RX_SB);
-		}
-		omap_writew(UDC_RXN_EOT, UDC_IRQ_SRC);
-
-		if (!list_empty(&ep->queue)) {
-			req = container_of(ep->queue.next,
-					struct omap_req, queue);
-			next_out_dma(ep, req);
-		}
-	}
-
-	if (irq_src & UDC_RXN_CNT) {
-		ep = &udc->ep[UDC_DMA_RX_SRC(dman_stat)];
-		ep->irqs++;
-		/* omap15xx does this unasked... */
-		VDBG("%s, RX_CNT irq?\n", ep->ep.name);
-		omap_writew(UDC_RXN_CNT, UDC_IRQ_SRC);
-	}
-}
-
-static void dma_error(int lch, u16 ch_status, void *data)
-{
-	struct omap_ep	*ep = data;
-
-	/* if ch_status & OMAP_DMA_DROP_IRQ ... */
-	/* if ch_status & OMAP1_DMA_TOUT_IRQ ... */
-	ERR("%s dma error, lch %d status %02x\n", ep->ep.name, lch, ch_status);
-
-	/* complete current transfer ... */
-}
-
-static void dma_channel_claim(struct omap_ep *ep, unsigned channel)
-{
-	u16	reg;
-	int	status, restart, is_in;
-	int	dma_channel;
-
-	is_in = ep->bEndpointAddress & USB_DIR_IN;
-	if (is_in)
-		reg = omap_readw(UDC_TXDMA_CFG);
-	else
-		reg = omap_readw(UDC_RXDMA_CFG);
-	reg |= UDC_DMA_REQ;		/* "pulse" activated */
-
-	ep->dma_channel = 0;
-	ep->lch = -1;
-	if (channel == 0 || channel > 3) {
-		if ((reg & 0x0f00) == 0)
-			channel = 3;
-		else if ((reg & 0x00f0) == 0)
-			channel = 2;
-		else if ((reg & 0x000f) == 0)	/* preferred for ISO */
-			channel = 1;
-		else {
-			status = -EMLINK;
-			goto just_restart;
-		}
-	}
-	reg |= (0x0f & ep->bEndpointAddress) << (4 * (channel - 1));
-	ep->dma_channel = channel;
-
-	if (is_in) {
-		dma_channel = OMAP_DMA_USB_W2FC_TX0 - 1 + channel;
-		status = omap_request_dma(dma_channel,
-			ep->ep.name, dma_error, ep, &ep->lch);
-		if (status == 0) {
-			omap_writew(reg, UDC_TXDMA_CFG);
-			/* EMIFF or SDRC */
-			omap_set_dma_src_burst_mode(ep->lch,
-						OMAP_DMA_DATA_BURST_4);
-			omap_set_dma_src_data_pack(ep->lch, 1);
-			/* TIPB */
-			omap_set_dma_dest_params(ep->lch,
-				OMAP_DMA_PORT_TIPB,
-				OMAP_DMA_AMODE_CONSTANT,
-				UDC_DATA_DMA,
-				0, 0);
-		}
-	} else {
-		dma_channel = OMAP_DMA_USB_W2FC_RX0 - 1 + channel;
-		status = omap_request_dma(dma_channel,
-			ep->ep.name, dma_error, ep, &ep->lch);
-		if (status == 0) {
-			omap_writew(reg, UDC_RXDMA_CFG);
-			/* TIPB */
-			omap_set_dma_src_params(ep->lch,
-				OMAP_DMA_PORT_TIPB,
-				OMAP_DMA_AMODE_CONSTANT,
-				UDC_DATA_DMA,
-				0, 0);
-			/* EMIFF or SDRC */
-			omap_set_dma_dest_burst_mode(ep->lch,
-						OMAP_DMA_DATA_BURST_4);
-			omap_set_dma_dest_data_pack(ep->lch, 1);
-		}
-	}
-	if (status)
-		ep->dma_channel = 0;
-	else {
-		ep->has_dma = 1;
-		omap_disable_dma_irq(ep->lch, OMAP_DMA_BLOCK_IRQ);
-
-		/* channel type P: hw synch (fifo) */
-		if (!cpu_is_omap15xx())
-			omap_set_dma_channel_mode(ep->lch, OMAP_DMA_LCH_P);
-	}
-
-just_restart:
-	/* restart any queue, even if the claim failed  */
-	restart = !ep->stopped && !list_empty(&ep->queue);
-
-	if (status)
-		DBG("%s no dma channel: %d%s\n", ep->ep.name, status,
-			restart ? " (restart)" : "");
-	else
-		DBG("%s claimed %cxdma%d lch %d%s\n", ep->ep.name,
-			is_in ? 't' : 'r',
-			ep->dma_channel - 1, ep->lch,
-			restart ? " (restart)" : "");
-
-	if (restart) {
-		struct omap_req	*req;
-		req = container_of(ep->queue.next, struct omap_req, queue);
-		if (ep->has_dma)
-			(is_in ? next_in_dma : next_out_dma)(ep, req);
-		else {
-			use_ep(ep, UDC_EP_SEL);
-			(is_in ? write_fifo : read_fifo)(ep, req);
-			deselect_ep();
-			if (!is_in) {
-				omap_writew(UDC_SET_FIFO_EN, UDC_CTRL);
-				ep->ackwait = 1 + ep->double_buf;
-			}
-			/* IN: 6 wait states before it'll tx */
-		}
-	}
-}
-
-static void dma_channel_release(struct omap_ep *ep)
-{
-	int		shift = 4 * (ep->dma_channel - 1);
-	u16		mask = 0x0f << shift;
-	struct omap_req	*req;
-	int		active;
-
-	/* abort any active usb transfer request */
-	if (!list_empty(&ep->queue))
-		req = container_of(ep->queue.next, struct omap_req, queue);
-	else
-		req = NULL;
-
-	active = omap_get_dma_active_status(ep->lch);
-
-	DBG("%s release %s %cxdma%d %p\n", ep->ep.name,
-			active ? "active" : "idle",
-			(ep->bEndpointAddress & USB_DIR_IN) ? 't' : 'r',
-			ep->dma_channel - 1, req);
-
-	/* NOTE: re-setting RX_REQ/TX_REQ because of a chip bug (before
-	 * OMAP 1710 ES2.0) where reading the DMA_CFG can clear them.
-	 */
-
-	/* wait till current packet DMA finishes, and fifo empties */
-	if (ep->bEndpointAddress & USB_DIR_IN) {
-		omap_writew((omap_readw(UDC_TXDMA_CFG) & ~mask) | UDC_DMA_REQ,
-					UDC_TXDMA_CFG);
-
-		if (req) {
-			finish_in_dma(ep, req, -ECONNRESET);
-
-			/* clear FIFO; hosts probably won't empty it */
-			use_ep(ep, UDC_EP_SEL);
-			omap_writew(UDC_CLR_EP, UDC_CTRL);
-			deselect_ep();
-		}
-		while (omap_readw(UDC_TXDMA_CFG) & mask)
-			udelay(10);
-	} else {
-		omap_writew((omap_readw(UDC_RXDMA_CFG) & ~mask) | UDC_DMA_REQ,
-					UDC_RXDMA_CFG);
-
-		/* dma empties the fifo */
-		while (omap_readw(UDC_RXDMA_CFG) & mask)
-			udelay(10);
-		if (req)
-			finish_out_dma(ep, req, -ECONNRESET, 0);
-	}
-	omap_free_dma(ep->lch);
-	ep->dma_channel = 0;
-	ep->lch = -1;
-	/* has_dma still set, till endpoint is fully quiesced */
-}
-
-
-/*-------------------------------------------------------------------------*/
-
-static int
-omap_ep_queue(struct usb_ep *_ep, struct usb_request *_req, gfp_t gfp_flags)
-{
-	struct omap_ep	*ep = container_of(_ep, struct omap_ep, ep);
-	struct omap_req	*req = container_of(_req, struct omap_req, req);
-	struct omap_udc	*udc;
-	unsigned long	flags;
-	int		is_iso = 0;
-
-	/* catch various bogus parameters */
-	if (!_req || !req->req.complete || !req->req.buf
-			|| !list_empty(&req->queue)) {
-		DBG("%s, bad params\n", __func__);
-		return -EINVAL;
-	}
-	if (!_ep || (!ep->ep.desc && ep->bEndpointAddress)) {
-		DBG("%s, bad ep\n", __func__);
-		return -EINVAL;
-	}
-	if (ep->bmAttributes == USB_ENDPOINT_XFER_ISOC) {
-		if (req->req.length > ep->ep.maxpacket)
-			return -EMSGSIZE;
-		is_iso = 1;
-	}
-
-	/* this isn't bogus, but OMAP DMA isn't the only hardware to
-	 * have a hard time with partial packet reads...  reject it.
-	 */
-	if (use_dma
-			&& ep->has_dma
-			&& ep->bEndpointAddress != 0
-			&& (ep->bEndpointAddress & USB_DIR_IN) == 0
-			&& (req->req.length % ep->ep.maxpacket) != 0) {
-		DBG("%s, no partial packet OUT reads\n", __func__);
-		return -EMSGSIZE;
-	}
-
-	udc = ep->udc;
-	if (!udc->driver || udc->gadget.speed == USB_SPEED_UNKNOWN)
-		return -ESHUTDOWN;
-
-	if (use_dma && ep->has_dma)
-		usb_gadget_map_request(&udc->gadget, &req->req,
-				(ep->bEndpointAddress & USB_DIR_IN));
-
-	VDBG("%s queue req %p, len %d buf %p\n",
-		ep->ep.name, _req, _req->length, _req->buf);
-
-	spin_lock_irqsave(&udc->lock, flags);
-
-	req->req.status = -EINPROGRESS;
-	req->req.actual = 0;
-
-	/* maybe kickstart non-iso i/o queues */
-	if (is_iso) {
-		u16 w;
-
-		w = omap_readw(UDC_IRQ_EN);
-		w |= UDC_SOF_IE;
-		omap_writew(w, UDC_IRQ_EN);
-	} else if (list_empty(&ep->queue) && !ep->stopped && !ep->ackwait) {
-		int	is_in;
-
-		if (ep->bEndpointAddress == 0) {
-			if (!udc->ep0_pending || !list_empty(&ep->queue)) {
-				spin_unlock_irqrestore(&udc->lock, flags);
-				return -EL2HLT;
-			}
-
-			/* empty DATA stage? */
-			is_in = udc->ep0_in;
-			if (!req->req.length) {
-
-				/* chip became CONFIGURED or ADDRESSED
-				 * earlier; drivers may already have queued
-				 * requests to non-control endpoints
-				 */
-				if (udc->ep0_set_config) {
-					u16	irq_en = omap_readw(UDC_IRQ_EN);
-
-					irq_en |= UDC_DS_CHG_IE | UDC_EP0_IE;
-					if (!udc->ep0_reset_config)
-						irq_en |= UDC_EPN_RX_IE
-							| UDC_EPN_TX_IE;
-					omap_writew(irq_en, UDC_IRQ_EN);
-				}
-
-				/* STATUS for zero length DATA stages is
-				 * always an IN ... even for IN transfers,
-				 * a weird case which seem to stall OMAP.
-				 */
-				omap_writew(UDC_EP_SEL | UDC_EP_DIR,
-						UDC_EP_NUM);
-				omap_writew(UDC_CLR_EP, UDC_CTRL);
-				omap_writew(UDC_SET_FIFO_EN, UDC_CTRL);
-				omap_writew(UDC_EP_DIR, UDC_EP_NUM);
-
-				/* cleanup */
-				udc->ep0_pending = 0;
-				done(ep, req, 0);
-				req = NULL;
-
-			/* non-empty DATA stage */
-			} else if (is_in) {
-				omap_writew(UDC_EP_SEL | UDC_EP_DIR,
-						UDC_EP_NUM);
-			} else {
-				if (udc->ep0_setup)
-					goto irq_wait;
-				omap_writew(UDC_EP_SEL, UDC_EP_NUM);
-			}
-		} else {
-			is_in = ep->bEndpointAddress & USB_DIR_IN;
-			if (!ep->has_dma)
-				use_ep(ep, UDC_EP_SEL);
-			/* if ISO: SOF IRQs must be enabled/disabled! */
-		}
-
-		if (ep->has_dma)
-			(is_in ? next_in_dma : next_out_dma)(ep, req);
-		else if (req) {
-			if ((is_in ? write_fifo : read_fifo)(ep, req) == 1)
-				req = NULL;
-			deselect_ep();
-			if (!is_in) {
-				omap_writew(UDC_SET_FIFO_EN, UDC_CTRL);
-				ep->ackwait = 1 + ep->double_buf;
-			}
-			/* IN: 6 wait states before it'll tx */
-		}
-	}
-
-irq_wait:
-	/* irq handler advances the queue */
-	if (req != NULL)
-		list_add_tail(&req->queue, &ep->queue);
-	spin_unlock_irqrestore(&udc->lock, flags);
-
-	return 0;
-}
-
-static int omap_ep_dequeue(struct usb_ep *_ep, struct usb_request *_req)
-{
-	struct omap_ep	*ep = container_of(_ep, struct omap_ep, ep);
-	struct omap_req	*req;
-	unsigned long	flags;
-
-	if (!_ep || !_req)
-		return -EINVAL;
-
-	spin_lock_irqsave(&ep->udc->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) {
-		spin_unlock_irqrestore(&ep->udc->lock, flags);
-		return -EINVAL;
-	}
-
-	if (use_dma && ep->dma_channel && ep->queue.next == &req->queue) {
-		int channel = ep->dma_channel;
-
-		/* releasing the channel cancels the request,
-		 * reclaiming the channel restarts the queue
-		 */
-		dma_channel_release(ep);
-		dma_channel_claim(ep, channel);
-	} else
-		done(ep, req, -ECONNRESET);
-	spin_unlock_irqrestore(&ep->udc->lock, flags);
-	return 0;
-}
-
-/*-------------------------------------------------------------------------*/
-
-static int omap_ep_set_halt(struct usb_ep *_ep, int value)
-{
-	struct omap_ep	*ep = container_of(_ep, struct omap_ep, ep);
-	unsigned long	flags;
-	int		status = -EOPNOTSUPP;
-
-	spin_lock_irqsave(&ep->udc->lock, flags);
-
-	/* just use protocol stalls for ep0; real halts are annoying */
-	if (ep->bEndpointAddress == 0) {
-		if (!ep->udc->ep0_pending)
-			status = -EINVAL;
-		else if (value) {
-			if (ep->udc->ep0_set_config) {
-				WARNING("error changing config?\n");
-				omap_writew(UDC_CLR_CFG, UDC_SYSCON2);
-			}
-			omap_writew(UDC_STALL_CMD, UDC_SYSCON2);
-			ep->udc->ep0_pending = 0;
-			status = 0;
-		} else /* NOP */
-			status = 0;
-
-	/* otherwise, all active non-ISO endpoints can halt */
-	} else if (ep->bmAttributes != USB_ENDPOINT_XFER_ISOC && ep->ep.desc) {
-
-		/* IN endpoints must already be idle */
-		if ((ep->bEndpointAddress & USB_DIR_IN)
-				&& !list_empty(&ep->queue)) {
-			status = -EAGAIN;
-			goto done;
-		}
-
-		if (value) {
-			int	channel;
-
-			if (use_dma && ep->dma_channel
-					&& !list_empty(&ep->queue)) {
-				channel = ep->dma_channel;
-				dma_channel_release(ep);
-			} else
-				channel = 0;
-
-			use_ep(ep, UDC_EP_SEL);
-			if (omap_readw(UDC_STAT_FLG) & UDC_NON_ISO_FIFO_EMPTY) {
-				omap_writew(UDC_SET_HALT, UDC_CTRL);
-				status = 0;
-			} else
-				status = -EAGAIN;
-			deselect_ep();
-
-			if (channel)
-				dma_channel_claim(ep, channel);
-		} else {
-			use_ep(ep, 0);
-			omap_writew(ep->udc->clr_halt, UDC_CTRL);
-			ep->ackwait = 0;
-			if (!(ep->bEndpointAddress & USB_DIR_IN)) {
-				omap_writew(UDC_SET_FIFO_EN, UDC_CTRL);
-				ep->ackwait = 1 + ep->double_buf;
-			}
-		}
-	}
-done:
-	VDBG("%s %s halt stat %d\n", ep->ep.name,
-		value ? "set" : "clear", status);
-
-	spin_unlock_irqrestore(&ep->udc->lock, flags);
-	return status;
-}
-
-static struct usb_ep_ops omap_ep_ops = {
-	.enable		= omap_ep_enable,
-	.disable	= omap_ep_disable,
-
-	.alloc_request	= omap_alloc_request,
-	.free_request	= omap_free_request,
-
-	.queue		= omap_ep_queue,
-	.dequeue	= omap_ep_dequeue,
-
-	.set_halt	= omap_ep_set_halt,
-	/* fifo_status ... report bytes in fifo */
-	/* fifo_flush ... flush fifo */
-};
-
-/*-------------------------------------------------------------------------*/
-
-static int omap_get_frame(struct usb_gadget *gadget)
-{
-	u16	sof = omap_readw(UDC_SOF);
-	return (sof & UDC_TS_OK) ? (sof & UDC_TS) : -EL2NSYNC;
-}
-
-static int omap_wakeup(struct usb_gadget *gadget)
-{
-	struct omap_udc	*udc;
-	unsigned long	flags;
-	int		retval = -EHOSTUNREACH;
-
-	udc = container_of(gadget, struct omap_udc, gadget);
-
-	spin_lock_irqsave(&udc->lock, flags);
-	if (udc->devstat & UDC_SUS) {
-		/* NOTE:  OTG spec erratum says that OTG devices may
-		 * issue wakeups without host enable.
-		 */
-		if (udc->devstat & (UDC_B_HNP_ENABLE|UDC_R_WK_OK)) {
-			DBG("remote wakeup...\n");
-			omap_writew(UDC_RMT_WKP, UDC_SYSCON2);
-			retval = 0;
-		}
-
-	/* NOTE:  non-OTG systems may use SRP TOO... */
-	} else if (!(udc->devstat & UDC_ATT)) {
-		if (!IS_ERR_OR_NULL(udc->transceiver))
-			retval = otg_start_srp(udc->transceiver->otg);
-	}
-	spin_unlock_irqrestore(&udc->lock, flags);
-
-	return retval;
-}
-
-static int
-omap_set_selfpowered(struct usb_gadget *gadget, int is_selfpowered)
-{
-	struct omap_udc	*udc;
-	unsigned long	flags;
-	u16		syscon1;
-
-	udc = container_of(gadget, struct omap_udc, gadget);
-	spin_lock_irqsave(&udc->lock, flags);
-	syscon1 = omap_readw(UDC_SYSCON1);
-	if (is_selfpowered)
-		syscon1 |= UDC_SELF_PWR;
-	else
-		syscon1 &= ~UDC_SELF_PWR;
-	omap_writew(syscon1, UDC_SYSCON1);
-	spin_unlock_irqrestore(&udc->lock, flags);
-
-	return 0;
-}
-
-static int can_pullup(struct omap_udc *udc)
-{
-	return udc->driver && udc->softconnect && udc->vbus_active;
-}
-
-static void pullup_enable(struct omap_udc *udc)
-{
-	u16 w;
-
-	w = omap_readw(UDC_SYSCON1);
-	w |= UDC_PULLUP_EN;
-	omap_writew(w, UDC_SYSCON1);
-	if (!gadget_is_otg(&udc->gadget) && !cpu_is_omap15xx()) {
-		u32 l;
-
-		l = omap_readl(OTG_CTRL);
-		l |= OTG_BSESSVLD;
-		omap_writel(l, OTG_CTRL);
-	}
-	omap_writew(UDC_DS_CHG_IE, UDC_IRQ_EN);
-}
-
-static void pullup_disable(struct omap_udc *udc)
-{
-	u16 w;
-
-	if (!gadget_is_otg(&udc->gadget) && !cpu_is_omap15xx()) {
-		u32 l;
-
-		l = omap_readl(OTG_CTRL);
-		l &= ~OTG_BSESSVLD;
-		omap_writel(l, OTG_CTRL);
-	}
-	omap_writew(UDC_DS_CHG_IE, UDC_IRQ_EN);
-	w = omap_readw(UDC_SYSCON1);
-	w &= ~UDC_PULLUP_EN;
-	omap_writew(w, UDC_SYSCON1);
-}
-
-static struct omap_udc *udc;
-
-static void omap_udc_enable_clock(int enable)
-{
-	if (udc == NULL || udc->dc_clk == NULL || udc->hhc_clk == NULL)
-		return;
-
-	if (enable) {
-		clk_enable(udc->dc_clk);
-		clk_enable(udc->hhc_clk);
-		udelay(100);
-	} else {
-		clk_disable(udc->hhc_clk);
-		clk_disable(udc->dc_clk);
-	}
-}
-
-/*
- * Called by whatever detects VBUS sessions:  external transceiver
- * driver, or maybe GPIO0 VBUS IRQ.  May request 48 MHz clock.
- */
-static int omap_vbus_session(struct usb_gadget *gadget, int is_active)
-{
-	struct omap_udc	*udc;
-	unsigned long	flags;
-	u32 l;
-
-	udc = container_of(gadget, struct omap_udc, gadget);
-	spin_lock_irqsave(&udc->lock, flags);
-	VDBG("VBUS %s\n", is_active ? "on" : "off");
-	udc->vbus_active = (is_active != 0);
-	if (cpu_is_omap15xx()) {
-		/* "software" detect, ignored if !VBUS_MODE_1510 */
-		l = omap_readl(FUNC_MUX_CTRL_0);
-		if (is_active)
-			l |= VBUS_CTRL_1510;
-		else
-			l &= ~VBUS_CTRL_1510;
-		omap_writel(l, FUNC_MUX_CTRL_0);
-	}
-	if (udc->dc_clk != NULL && is_active) {
-		if (!udc->clk_requested) {
-			omap_udc_enable_clock(1);
-			udc->clk_requested = 1;
-		}
-	}
-	if (can_pullup(udc))
-		pullup_enable(udc);
-	else
-		pullup_disable(udc);
-	if (udc->dc_clk != NULL && !is_active) {
-		if (udc->clk_requested) {
-			omap_udc_enable_clock(0);
-			udc->clk_requested = 0;
-		}
-	}
-	spin_unlock_irqrestore(&udc->lock, flags);
-	return 0;
-}
-
-static int omap_vbus_draw(struct usb_gadget *gadget, unsigned mA)
-{
-	struct omap_udc	*udc;
-
-	udc = container_of(gadget, struct omap_udc, gadget);
-	if (!IS_ERR_OR_NULL(udc->transceiver))
-		return usb_phy_set_power(udc->transceiver, mA);
-	return -EOPNOTSUPP;
-}
-
-static int omap_pullup(struct usb_gadget *gadget, int is_on)
-{
-	struct omap_udc	*udc;
-	unsigned long	flags;
-
-	udc = container_of(gadget, struct omap_udc, gadget);
-	spin_lock_irqsave(&udc->lock, flags);
-	udc->softconnect = (is_on != 0);
-	if (can_pullup(udc))
-		pullup_enable(udc);
-	else
-		pullup_disable(udc);
-	spin_unlock_irqrestore(&udc->lock, flags);
-	return 0;
-}
-
-static int omap_udc_start(struct usb_gadget *g,
-		struct usb_gadget_driver *driver);
-static int omap_udc_stop(struct usb_gadget *g,
-		struct usb_gadget_driver *driver);
-
-static const struct usb_gadget_ops omap_gadget_ops = {
-	.get_frame		= omap_get_frame,
-	.wakeup			= omap_wakeup,
-	.set_selfpowered	= omap_set_selfpowered,
-	.vbus_session		= omap_vbus_session,
-	.vbus_draw		= omap_vbus_draw,
-	.pullup			= omap_pullup,
-	.udc_start		= omap_udc_start,
-	.udc_stop		= omap_udc_stop,
-};
-
-/*-------------------------------------------------------------------------*/
-
-/* dequeue ALL requests; caller holds udc->lock */
-static void nuke(struct omap_ep *ep, int status)
-{
-	struct omap_req	*req;
-
-	ep->stopped = 1;
-
-	if (use_dma && ep->dma_channel)
-		dma_channel_release(ep);
-
-	use_ep(ep, 0);
-	omap_writew(UDC_CLR_EP, UDC_CTRL);
-	if (ep->bEndpointAddress && ep->bmAttributes != USB_ENDPOINT_XFER_ISOC)
-		omap_writew(UDC_SET_HALT, UDC_CTRL);
-
-	while (!list_empty(&ep->queue)) {
-		req = list_entry(ep->queue.next, struct omap_req, queue);
-		done(ep, req, status);
-	}
-}
-
-/* caller holds udc->lock */
-static void udc_quiesce(struct omap_udc *udc)
-{
-	struct omap_ep	*ep;
-
-	udc->gadget.speed = USB_SPEED_UNKNOWN;
-	nuke(&udc->ep[0], -ESHUTDOWN);
-	list_for_each_entry(ep, &udc->gadget.ep_list, ep.ep_list)
-		nuke(ep, -ESHUTDOWN);
-}
-
-/*-------------------------------------------------------------------------*/
-
-static void update_otg(struct omap_udc *udc)
-{
-	u16	devstat;
-
-	if (!gadget_is_otg(&udc->gadget))
-		return;
-
-	if (omap_readl(OTG_CTRL) & OTG_ID)
-		devstat = omap_readw(UDC_DEVSTAT);
-	else
-		devstat = 0;
-
-	udc->gadget.b_hnp_enable = !!(devstat & UDC_B_HNP_ENABLE);
-	udc->gadget.a_hnp_support = !!(devstat & UDC_A_HNP_SUPPORT);
-	udc->gadget.a_alt_hnp_support = !!(devstat & UDC_A_ALT_HNP_SUPPORT);
-
-	/* Enable HNP early, avoiding races on suspend irq path.
-	 * ASSUMES OTG state machine B_BUS_REQ input is true.
-	 */
-	if (udc->gadget.b_hnp_enable) {
-		u32 l;
-
-		l = omap_readl(OTG_CTRL);
-		l |= OTG_B_HNPEN | OTG_B_BUSREQ;
-		l &= ~OTG_PULLUP;
-		omap_writel(l, OTG_CTRL);
-	}
-}
-
-static void ep0_irq(struct omap_udc *udc, u16 irq_src)
-{
-	struct omap_ep	*ep0 = &udc->ep[0];
-	struct omap_req	*req = NULL;
-
-	ep0->irqs++;
-
-	/* Clear any pending requests and then scrub any rx/tx state
-	 * before starting to handle the SETUP request.
-	 */
-	if (irq_src & UDC_SETUP) {
-		u16	ack = irq_src & (UDC_EP0_TX|UDC_EP0_RX);
-
-		nuke(ep0, 0);
-		if (ack) {
-			omap_writew(ack, UDC_IRQ_SRC);
-			irq_src = UDC_SETUP;
-		}
-	}
-
-	/* IN/OUT packets mean we're in the DATA or STATUS stage.
-	 * This driver uses only uses protocol stalls (ep0 never halts),
-	 * and if we got this far the gadget driver already had a
-	 * chance to stall.  Tries to be forgiving of host oddities.
-	 *
-	 * NOTE:  the last chance gadget drivers have to stall control
-	 * requests is during their request completion callback.
-	 */
-	if (!list_empty(&ep0->queue))
-		req = container_of(ep0->queue.next, struct omap_req, queue);
-
-	/* IN == TX to host */
-	if (irq_src & UDC_EP0_TX) {
-		int	stat;
-
-		omap_writew(UDC_EP0_TX, UDC_IRQ_SRC);
-		omap_writew(UDC_EP_SEL|UDC_EP_DIR, UDC_EP_NUM);
-		stat = omap_readw(UDC_STAT_FLG);
-		if (stat & UDC_ACK) {
-			if (udc->ep0_in) {
-				/* write next IN packet from response,
-				 * or set up the status stage.
-				 */
-				if (req)
-					stat = write_fifo(ep0, req);
-				omap_writew(UDC_EP_DIR, UDC_EP_NUM);
-				if (!req && udc->ep0_pending) {
-					omap_writew(UDC_EP_SEL, UDC_EP_NUM);
-					omap_writew(UDC_CLR_EP, UDC_CTRL);
-					omap_writew(UDC_SET_FIFO_EN, UDC_CTRL);
-					omap_writew(0, UDC_EP_NUM);
-					udc->ep0_pending = 0;
-				} /* else:  6 wait states before it'll tx */
-			} else {
-				/* ack status stage of OUT transfer */
-				omap_writew(UDC_EP_DIR, UDC_EP_NUM);
-				if (req)
-					done(ep0, req, 0);
-			}
-			req = NULL;
-		} else if (stat & UDC_STALL) {
-			omap_writew(UDC_CLR_HALT, UDC_CTRL);
-			omap_writew(UDC_EP_DIR, UDC_EP_NUM);
-		} else {
-			omap_writew(UDC_EP_DIR, UDC_EP_NUM);
-		}
-	}
-
-	/* OUT == RX from host */
-	if (irq_src & UDC_EP0_RX) {
-		int	stat;
-
-		omap_writew(UDC_EP0_RX, UDC_IRQ_SRC);
-		omap_writew(UDC_EP_SEL, UDC_EP_NUM);
-		stat = omap_readw(UDC_STAT_FLG);
-		if (stat & UDC_ACK) {
-			if (!udc->ep0_in) {
-				stat = 0;
-				/* read next OUT packet of request, maybe
-				 * reactiviting the fifo; stall on errors.
-				 */
-				stat = read_fifo(ep0, req);
-				if (!req || stat < 0) {
-					omap_writew(UDC_STALL_CMD, UDC_SYSCON2);
-					udc->ep0_pending = 0;
-					stat = 0;
-				} else if (stat == 0)
-					omap_writew(UDC_SET_FIFO_EN, UDC_CTRL);
-				omap_writew(0, UDC_EP_NUM);
-
-				/* activate status stage */
-				if (stat == 1) {
-					done(ep0, req, 0);
-					/* that may have STALLed ep0... */
-					omap_writew(UDC_EP_SEL | UDC_EP_DIR,
-							UDC_EP_NUM);
-					omap_writew(UDC_CLR_EP, UDC_CTRL);
-					omap_writew(UDC_SET_FIFO_EN, UDC_CTRL);
-					omap_writew(UDC_EP_DIR, UDC_EP_NUM);
-					udc->ep0_pending = 0;
-				}
-			} else {
-				/* ack status stage of IN transfer */
-				omap_writew(0, UDC_EP_NUM);
-				if (req)
-					done(ep0, req, 0);
-			}
-		} else if (stat & UDC_STALL) {
-			omap_writew(UDC_CLR_HALT, UDC_CTRL);
-			omap_writew(0, UDC_EP_NUM);
-		} else {
-			omap_writew(0, UDC_EP_NUM);
-		}
-	}
-
-	/* SETUP starts all control transfers */
-	if (irq_src & UDC_SETUP) {
-		union u {
-			u16			word[4];
-			struct usb_ctrlrequest	r;
-		} u;
-		int			status = -EINVAL;
-		struct omap_ep		*ep;
-
-		/* read the (latest) SETUP message */
-		do {
-			omap_writew(UDC_SETUP_SEL, UDC_EP_NUM);
-			/* two bytes at a time */
-			u.word[0] = omap_readw(UDC_DATA);
-			u.word[1] = omap_readw(UDC_DATA);
-			u.word[2] = omap_readw(UDC_DATA);
-			u.word[3] = omap_readw(UDC_DATA);
-			omap_writew(0, UDC_EP_NUM);
-		} while (omap_readw(UDC_IRQ_SRC) & UDC_SETUP);
-
-#define	w_value		le16_to_cpu(u.r.wValue)
-#define	w_index		le16_to_cpu(u.r.wIndex)
-#define	w_length	le16_to_cpu(u.r.wLength)
-
-		/* Delegate almost all control requests to the gadget driver,
-		 * except for a handful of ch9 status/feature requests that
-		 * hardware doesn't autodecode _and_ the gadget API hides.
-		 */
-		udc->ep0_in = (u.r.bRequestType & USB_DIR_IN) != 0;
-		udc->ep0_set_config = 0;
-		udc->ep0_pending = 1;
-		ep0->stopped = 0;
-		ep0->ackwait = 0;
-		switch (u.r.bRequest) {
-		case USB_REQ_SET_CONFIGURATION:
-			/* udc needs to know when ep != 0 is valid */
-			if (u.r.bRequestType != USB_RECIP_DEVICE)
-				goto delegate;
-			if (w_length != 0)
-				goto do_stall;
-			udc->ep0_set_config = 1;
-			udc->ep0_reset_config = (w_value == 0);
-			VDBG("set config %d\n", w_value);
-
-			/* update udc NOW since gadget driver may start
-			 * queueing requests immediately; clear config
-			 * later if it fails the request.
-			 */
-			if (udc->ep0_reset_config)
-				omap_writew(UDC_CLR_CFG, UDC_SYSCON2);
-			else
-				omap_writew(UDC_DEV_CFG, UDC_SYSCON2);
-			update_otg(udc);
-			goto delegate;
-		case USB_REQ_CLEAR_FEATURE:
-			/* clear endpoint halt */
-			if (u.r.bRequestType != USB_RECIP_ENDPOINT)
-				goto delegate;
-			if (w_value != USB_ENDPOINT_HALT
-					|| w_length != 0)
-				goto do_stall;
-			ep = &udc->ep[w_index & 0xf];
-			if (ep != ep0) {
-				if (w_index & USB_DIR_IN)
-					ep += 16;
-				if (ep->bmAttributes == USB_ENDPOINT_XFER_ISOC
-						|| !ep->ep.desc)
-					goto do_stall;
-				use_ep(ep, 0);
-				omap_writew(udc->clr_halt, UDC_CTRL);
-				ep->ackwait = 0;
-				if (!(ep->bEndpointAddress & USB_DIR_IN)) {
-					omap_writew(UDC_SET_FIFO_EN, UDC_CTRL);
-					ep->ackwait = 1 + ep->double_buf;
-				}
-				/* NOTE:  assumes the host behaves sanely,
-				 * only clearing real halts.  Else we may
-				 * need to kill pending transfers and then
-				 * restart the queue... very messy for DMA!
-				 */
-			}
-			VDBG("%s halt cleared by host\n", ep->name);
-			goto ep0out_status_stage;
-		case USB_REQ_SET_FEATURE:
-			/* set endpoint halt */
-			if (u.r.bRequestType != USB_RECIP_ENDPOINT)
-				goto delegate;
-			if (w_value != USB_ENDPOINT_HALT
-					|| w_length != 0)
-				goto do_stall;
-			ep = &udc->ep[w_index & 0xf];
-			if (w_index & USB_DIR_IN)
-				ep += 16;
-			if (ep->bmAttributes == USB_ENDPOINT_XFER_ISOC
-					|| ep == ep0 || !ep->ep.desc)
-				goto do_stall;
-			if (use_dma && ep->has_dma) {
-				/* this has rude side-effects (aborts) and
-				 * can't really work if DMA-IN is active
-				 */
-				DBG("%s host set_halt, NYET\n", ep->name);
-				goto do_stall;
-			}
-			use_ep(ep, 0);
-			/* can't halt if fifo isn't empty... */
-			omap_writew(UDC_CLR_EP, UDC_CTRL);
-			omap_writew(UDC_SET_HALT, UDC_CTRL);
-			VDBG("%s halted by host\n", ep->name);
-ep0out_status_stage:
-			status = 0;
-			omap_writew(UDC_EP_SEL|UDC_EP_DIR, UDC_EP_NUM);
-			omap_writew(UDC_CLR_EP, UDC_CTRL);
-			omap_writew(UDC_SET_FIFO_EN, UDC_CTRL);
-			omap_writew(UDC_EP_DIR, UDC_EP_NUM);
-			udc->ep0_pending = 0;
-			break;
-		case USB_REQ_GET_STATUS:
-			/* USB_ENDPOINT_HALT status? */
-			if (u.r.bRequestType != (USB_DIR_IN|USB_RECIP_ENDPOINT))
-				goto intf_status;
-
-			/* ep0 never stalls */
-			if (!(w_index & 0xf))
-				goto zero_status;
-
-			/* only active endpoints count */
-			ep = &udc->ep[w_index & 0xf];
-			if (w_index & USB_DIR_IN)
-				ep += 16;
-			if (!ep->ep.desc)
-				goto do_stall;
-
-			/* iso never stalls */
-			if (ep->bmAttributes == USB_ENDPOINT_XFER_ISOC)
-				goto zero_status;
-
-			/* FIXME don't assume non-halted endpoints!! */
-			ERR("%s status, can't report\n", ep->ep.name);
-			goto do_stall;
-
-intf_status:
-			/* return interface status.  if we were pedantic,
-			 * we'd detect non-existent interfaces, and stall.
-			 */
-			if (u.r.bRequestType
-					!= (USB_DIR_IN|USB_RECIP_INTERFACE))
-				goto delegate;
-
-zero_status:
-			/* return two zero bytes */
-			omap_writew(UDC_EP_SEL|UDC_EP_DIR, UDC_EP_NUM);
-			omap_writew(0, UDC_DATA);
-			omap_writew(UDC_SET_FIFO_EN, UDC_CTRL);
-			omap_writew(UDC_EP_DIR, UDC_EP_NUM);
-			status = 0;
-			VDBG("GET_STATUS, interface %d\n", w_index);
-			/* next, status stage */
-			break;
-		default:
-delegate:
-			/* activate the ep0out fifo right away */
-			if (!udc->ep0_in && w_length) {
-				omap_writew(0, UDC_EP_NUM);
-				omap_writew(UDC_SET_FIFO_EN, UDC_CTRL);
-			}
-
-			/* gadget drivers see class/vendor specific requests,
-			 * {SET,GET}_{INTERFACE,DESCRIPTOR,CONFIGURATION},
-			 * and more
-			 */
-			VDBG("SETUP %02x.%02x v%04x i%04x l%04x\n",
-				u.r.bRequestType, u.r.bRequest,
-				w_value, w_index, w_length);
-
-#undef	w_value
-#undef	w_index
-#undef	w_length
-
-			/* The gadget driver may return an error here,
-			 * causing an immediate protocol stall.
-			 *
-			 * Else it must issue a response, either queueing a
-			 * response buffer for the DATA stage, or halting ep0
-			 * (causing a protocol stall, not a real halt).  A
-			 * zero length buffer means no DATA stage.
-			 *
-			 * It's fine to issue that response after the setup()
-			 * call returns, and this IRQ was handled.
-			 */
-			udc->ep0_setup = 1;
-			spin_unlock(&udc->lock);
-			status = udc->driver->setup(&udc->gadget, &u.r);
-			spin_lock(&udc->lock);
-			udc->ep0_setup = 0;
-		}
-
-		if (status < 0) {
-do_stall:
-			VDBG("req %02x.%02x protocol STALL; stat %d\n",
-					u.r.bRequestType, u.r.bRequest, status);
-			if (udc->ep0_set_config) {
-				if (udc->ep0_reset_config)
-					WARNING("error resetting config?\n");
-				else
-					omap_writew(UDC_CLR_CFG, UDC_SYSCON2);
-			}
-			omap_writew(UDC_STALL_CMD, UDC_SYSCON2);
-			udc->ep0_pending = 0;
-		}
-	}
-}
-
-/*-------------------------------------------------------------------------*/
-
-#define OTG_FLAGS (UDC_B_HNP_ENABLE|UDC_A_HNP_SUPPORT|UDC_A_ALT_HNP_SUPPORT)
-
-static void devstate_irq(struct omap_udc *udc, u16 irq_src)
-{
-	u16	devstat, change;
-
-	devstat = omap_readw(UDC_DEVSTAT);
-	change = devstat ^ udc->devstat;
-	udc->devstat = devstat;
-
-	if (change & (UDC_USB_RESET|UDC_ATT)) {
-		udc_quiesce(udc);
-
-		if (change & UDC_ATT) {
-			/* driver for any external transceiver will
-			 * have called omap_vbus_session() already
-			 */
-			if (devstat & UDC_ATT) {
-				udc->gadget.speed = USB_SPEED_FULL;
-				VDBG("connect\n");
-				if (IS_ERR_OR_NULL(udc->transceiver))
-					pullup_enable(udc);
-				/* if (driver->connect) call it */
-			} else if (udc->gadget.speed != USB_SPEED_UNKNOWN) {
-				udc->gadget.speed = USB_SPEED_UNKNOWN;
-				if (IS_ERR_OR_NULL(udc->transceiver))
-					pullup_disable(udc);
-				DBG("disconnect, gadget %s\n",
-					udc->driver->driver.name);
-				if (udc->driver->disconnect) {
-					spin_unlock(&udc->lock);
-					udc->driver->disconnect(&udc->gadget);
-					spin_lock(&udc->lock);
-				}
-			}
-			change &= ~UDC_ATT;
-		}
-
-		if (change & UDC_USB_RESET) {
-			if (devstat & UDC_USB_RESET) {
-				VDBG("RESET=1\n");
-			} else {
-				udc->gadget.speed = USB_SPEED_FULL;
-				INFO("USB reset done, gadget %s\n",
-					udc->driver->driver.name);
-				/* ep0 traffic is legal from now on */
-				omap_writew(UDC_DS_CHG_IE | UDC_EP0_IE,
-						UDC_IRQ_EN);
-			}
-			change &= ~UDC_USB_RESET;
-		}
-	}
-	if (change & UDC_SUS) {
-		if (udc->gadget.speed != USB_SPEED_UNKNOWN) {
-			/* FIXME tell isp1301 to suspend/resume (?) */
-			if (devstat & UDC_SUS) {
-				VDBG("suspend\n");
-				update_otg(udc);
-				/* HNP could be under way already */
-				if (udc->gadget.speed == USB_SPEED_FULL
-						&& udc->driver->suspend) {
-					spin_unlock(&udc->lock);
-					udc->driver->suspend(&udc->gadget);
-					spin_lock(&udc->lock);
-				}
-				if (!IS_ERR_OR_NULL(udc->transceiver))
-					usb_phy_set_suspend(
-							udc->transceiver, 1);
-			} else {
-				VDBG("resume\n");
-				if (!IS_ERR_OR_NULL(udc->transceiver))
-					usb_phy_set_suspend(
-							udc->transceiver, 0);
-				if (udc->gadget.speed == USB_SPEED_FULL
-						&& udc->driver->resume) {
-					spin_unlock(&udc->lock);
-					udc->driver->resume(&udc->gadget);
-					spin_lock(&udc->lock);
-				}
-			}
-		}
-		change &= ~UDC_SUS;
-	}
-	if (!cpu_is_omap15xx() && (change & OTG_FLAGS)) {
-		update_otg(udc);
-		change &= ~OTG_FLAGS;
-	}
-
-	change &= ~(UDC_CFG|UDC_DEF|UDC_ADD);
-	if (change)
-		VDBG("devstat %03x, ignore change %03x\n",
-			devstat,  change);
-
-	omap_writew(UDC_DS_CHG, UDC_IRQ_SRC);
-}
-
-static irqreturn_t omap_udc_irq(int irq, void *_udc)
-{
-	struct omap_udc	*udc = _udc;
-	u16		irq_src;
-	irqreturn_t	status = IRQ_NONE;
-	unsigned long	flags;
-
-	spin_lock_irqsave(&udc->lock, flags);
-	irq_src = omap_readw(UDC_IRQ_SRC);
-
-	/* Device state change (usb ch9 stuff) */
-	if (irq_src & UDC_DS_CHG) {
-		devstate_irq(_udc, irq_src);
-		status = IRQ_HANDLED;
-		irq_src &= ~UDC_DS_CHG;
-	}
-
-	/* EP0 control transfers */
-	if (irq_src & (UDC_EP0_RX|UDC_SETUP|UDC_EP0_TX)) {
-		ep0_irq(_udc, irq_src);
-		status = IRQ_HANDLED;
-		irq_src &= ~(UDC_EP0_RX|UDC_SETUP|UDC_EP0_TX);
-	}
-
-	/* DMA transfer completion */
-	if (use_dma && (irq_src & (UDC_TXN_DONE|UDC_RXN_CNT|UDC_RXN_EOT))) {
-		dma_irq(_udc, irq_src);
-		status = IRQ_HANDLED;
-		irq_src &= ~(UDC_TXN_DONE|UDC_RXN_CNT|UDC_RXN_EOT);
-	}
-
-	irq_src &= ~(UDC_IRQ_SOF | UDC_EPN_TX|UDC_EPN_RX);
-	if (irq_src)
-		DBG("udc_irq, unhandled %03x\n", irq_src);
-	spin_unlock_irqrestore(&udc->lock, flags);
-
-	return status;
-}
-
-/* workaround for seemingly-lost IRQs for RX ACKs... */
-#define PIO_OUT_TIMEOUT	(jiffies + HZ/3)
-#define HALF_FULL(f)	(!((f)&(UDC_NON_ISO_FIFO_FULL|UDC_NON_ISO_FIFO_EMPTY)))
-
-static void pio_out_timer(unsigned long _ep)
-{
-	struct omap_ep	*ep = (void *) _ep;
-	unsigned long	flags;
-	u16		stat_flg;
-
-	spin_lock_irqsave(&ep->udc->lock, flags);
-	if (!list_empty(&ep->queue) && ep->ackwait) {
-		use_ep(ep, UDC_EP_SEL);
-		stat_flg = omap_readw(UDC_STAT_FLG);
-
-		if ((stat_flg & UDC_ACK) && (!(stat_flg & UDC_FIFO_EN)
-				|| (ep->double_buf && HALF_FULL(stat_flg)))) {
-			struct omap_req	*req;
-
-			VDBG("%s: lose, %04x\n", ep->ep.name, stat_flg);
-			req = container_of(ep->queue.next,
-					struct omap_req, queue);
-			(void) read_fifo(ep, req);
-			omap_writew(ep->bEndpointAddress, UDC_EP_NUM);
-			omap_writew(UDC_SET_FIFO_EN, UDC_CTRL);
-			ep->ackwait = 1 + ep->double_buf;
-		} else
-			deselect_ep();
-	}
-	mod_timer(&ep->timer, PIO_OUT_TIMEOUT);
-	spin_unlock_irqrestore(&ep->udc->lock, flags);
-}
-
-static irqreturn_t omap_udc_pio_irq(int irq, void *_dev)
-{
-	u16		epn_stat, irq_src;
-	irqreturn_t	status = IRQ_NONE;
-	struct omap_ep	*ep;
-	int		epnum;
-	struct omap_udc	*udc = _dev;
-	struct omap_req	*req;
-	unsigned long	flags;
-
-	spin_lock_irqsave(&udc->lock, flags);
-	epn_stat = omap_readw(UDC_EPN_STAT);
-	irq_src = omap_readw(UDC_IRQ_SRC);
-
-	/* handle OUT first, to avoid some wasteful NAKs */
-	if (irq_src & UDC_EPN_RX) {
-		epnum = (epn_stat >> 8) & 0x0f;
-		omap_writew(UDC_EPN_RX, UDC_IRQ_SRC);
-		status = IRQ_HANDLED;
-		ep = &udc->ep[epnum];
-		ep->irqs++;
-
-		omap_writew(epnum | UDC_EP_SEL, UDC_EP_NUM);
-		ep->fnf = 0;
-		if (omap_readw(UDC_STAT_FLG) & UDC_ACK) {
-			ep->ackwait--;
-			if (!list_empty(&ep->queue)) {
-				int stat;
-				req = container_of(ep->queue.next,
-						struct omap_req, queue);
-				stat = read_fifo(ep, req);
-				if (!ep->double_buf)
-					ep->fnf = 1;
-			}
-		}
-		/* min 6 clock delay before clearing EP_SEL ... */
-		epn_stat = omap_readw(UDC_EPN_STAT);
-		epn_stat = omap_readw(UDC_EPN_STAT);
-		omap_writew(epnum, UDC_EP_NUM);
-
-		/* enabling fifo _after_ clearing ACK, contrary to docs,
-		 * reduces lossage; timer still needed though (sigh).
-		 */
-		if (ep->fnf) {
-			omap_writew(UDC_SET_FIFO_EN, UDC_CTRL);
-			ep->ackwait = 1 + ep->double_buf;
-		}
-		mod_timer(&ep->timer, PIO_OUT_TIMEOUT);
-	}
-
-	/* then IN transfers */
-	else if (irq_src & UDC_EPN_TX) {
-		epnum = epn_stat & 0x0f;
-		omap_writew(UDC_EPN_TX, UDC_IRQ_SRC);
-		status = IRQ_HANDLED;
-		ep = &udc->ep[16 + epnum];
-		ep->irqs++;
-
-		omap_writew(epnum | UDC_EP_DIR | UDC_EP_SEL, UDC_EP_NUM);
-		if (omap_readw(UDC_STAT_FLG) & UDC_ACK) {
-			ep->ackwait = 0;
-			if (!list_empty(&ep->queue)) {
-				req = container_of(ep->queue.next,
-						struct omap_req, queue);
-				(void) write_fifo(ep, req);
-			}
-		}
-		/* min 6 clock delay before clearing EP_SEL ... */
-		epn_stat = omap_readw(UDC_EPN_STAT);
-		epn_stat = omap_readw(UDC_EPN_STAT);
-		omap_writew(epnum | UDC_EP_DIR, UDC_EP_NUM);
-		/* then 6 clocks before it'd tx */
-	}
-
-	spin_unlock_irqrestore(&udc->lock, flags);
-	return status;
-}
-
-#ifdef	USE_ISO
-static irqreturn_t omap_udc_iso_irq(int irq, void *_dev)
-{
-	struct omap_udc	*udc = _dev;
-	struct omap_ep	*ep;
-	int		pending = 0;
-	unsigned long	flags;
-
-	spin_lock_irqsave(&udc->lock, flags);
-
-	/* handle all non-DMA ISO transfers */
-	list_for_each_entry(ep, &udc->iso, iso) {
-		u16		stat;
-		struct omap_req	*req;
-
-		if (ep->has_dma || list_empty(&ep->queue))
-			continue;
-		req = list_entry(ep->queue.next, struct omap_req, queue);
-
-		use_ep(ep, UDC_EP_SEL);
-		stat = omap_readw(UDC_STAT_FLG);
-
-		/* NOTE: like the other controller drivers, this isn't
-		 * currently reporting lost or damaged frames.
-		 */
-		if (ep->bEndpointAddress & USB_DIR_IN) {
-			if (stat & UDC_MISS_IN)
-				/* done(ep, req, -EPROTO) */;
-			else
-				write_fifo(ep, req);
-		} else {
-			int	status = 0;
-
-			if (stat & UDC_NO_RXPACKET)
-				status = -EREMOTEIO;
-			else if (stat & UDC_ISO_ERR)
-				status = -EILSEQ;
-			else if (stat & UDC_DATA_FLUSH)
-				status = -ENOSR;
-
-			if (status)
-				/* done(ep, req, status) */;
-			else
-				read_fifo(ep, req);
-		}
-		deselect_ep();
-		/* 6 wait states before next EP */
-
-		ep->irqs++;
-		if (!list_empty(&ep->queue))
-			pending = 1;
-	}
-	if (!pending) {
-		u16 w;
-
-		w = omap_readw(UDC_IRQ_EN);
-		w &= ~UDC_SOF_IE;
-		omap_writew(w, UDC_IRQ_EN);
-	}
-	omap_writew(UDC_IRQ_SOF, UDC_IRQ_SRC);
-
-	spin_unlock_irqrestore(&udc->lock, flags);
-	return IRQ_HANDLED;
-}
-#endif
-
-/*-------------------------------------------------------------------------*/
-
-static inline int machine_without_vbus_sense(void)
-{
-	return machine_is_omap_innovator()
-		|| machine_is_omap_osk()
-		|| machine_is_sx1()
-		/* No known omap7xx boards with vbus sense */
-		|| cpu_is_omap7xx();
-}
-
-static int omap_udc_start(struct usb_gadget *g,
-		struct usb_gadget_driver *driver)
-{
-	int		status = -ENODEV;
-	struct omap_ep	*ep;
-	unsigned long	flags;
-
-
-	spin_lock_irqsave(&udc->lock, flags);
-	/* reset state */
-	list_for_each_entry(ep, &udc->gadget.ep_list, ep.ep_list) {
-		ep->irqs = 0;
-		if (ep->bmAttributes == USB_ENDPOINT_XFER_ISOC)
-			continue;
-		use_ep(ep, 0);
-		omap_writew(UDC_SET_HALT, UDC_CTRL);
-	}
-	udc->ep0_pending = 0;
-	udc->ep[0].irqs = 0;
-	udc->softconnect = 1;
-
-	/* hook up the driver */
-	driver->driver.bus = NULL;
-	udc->driver = driver;
-	spin_unlock_irqrestore(&udc->lock, flags);
-
-	if (udc->dc_clk != NULL)
-		omap_udc_enable_clock(1);
-
-	omap_writew(UDC_IRQ_SRC_MASK, UDC_IRQ_SRC);
-
-	/* connect to bus through transceiver */
-	if (!IS_ERR_OR_NULL(udc->transceiver)) {
-		status = otg_set_peripheral(udc->transceiver->otg,
-						&udc->gadget);
-		if (status < 0) {
-			ERR("can't bind to transceiver\n");
-			udc->driver = NULL;
-			goto done;
-		}
-	} else {
-		if (can_pullup(udc))
-			pullup_enable(udc);
-		else
-			pullup_disable(udc);
-	}
-
-	/* boards that don't have VBUS sensing can't autogate 48MHz;
-	 * can't enter deep sleep while a gadget driver is active.
-	 */
-	if (machine_without_vbus_sense())
-		omap_vbus_session(&udc->gadget, 1);
-
-done:
-	if (udc->dc_clk != NULL)
-		omap_udc_enable_clock(0);
-
-	return status;
-}
-
-static int omap_udc_stop(struct usb_gadget *g,
-		struct usb_gadget_driver *driver)
-{
-	unsigned long	flags;
-	int		status = -ENODEV;
-
-	if (udc->dc_clk != NULL)
-		omap_udc_enable_clock(1);
-
-	if (machine_without_vbus_sense())
-		omap_vbus_session(&udc->gadget, 0);
-
-	if (!IS_ERR_OR_NULL(udc->transceiver))
-		(void) otg_set_peripheral(udc->transceiver->otg, NULL);
-	else
-		pullup_disable(udc);
-
-	spin_lock_irqsave(&udc->lock, flags);
-	udc_quiesce(udc);
-	spin_unlock_irqrestore(&udc->lock, flags);
-
-	udc->driver = NULL;
-
-	if (udc->dc_clk != NULL)
-		omap_udc_enable_clock(0);
-
-	return status;
-}
-
-/*-------------------------------------------------------------------------*/
-
-#ifdef CONFIG_USB_GADGET_DEBUG_FILES
-
-#include <linux/seq_file.h>
-
-static const char proc_filename[] = "driver/udc";
-
-#define FOURBITS "%s%s%s%s"
-#define EIGHTBITS "%s%s%s%s%s%s%s%s"
-
-static void proc_ep_show(struct seq_file *s, struct omap_ep *ep)
-{
-	u16		stat_flg;
-	struct omap_req	*req;
-	char		buf[20];
-
-	use_ep(ep, 0);
-
-	if (use_dma && ep->has_dma)
-		snprintf(buf, sizeof buf, "(%cxdma%d lch%d) ",
-			(ep->bEndpointAddress & USB_DIR_IN) ? 't' : 'r',
-			ep->dma_channel - 1, ep->lch);
-	else
-		buf[0] = 0;
-
-	stat_flg = omap_readw(UDC_STAT_FLG);
-	seq_printf(s,
-		"\n%s %s%s%sirqs %ld stat %04x " EIGHTBITS FOURBITS "%s\n",
-		ep->name, buf,
-		ep->double_buf ? "dbuf " : "",
-		({ char *s;
-		switch (ep->ackwait) {
-		case 0:
-			s = "";
-			break;
-		case 1:
-			s = "(ackw) ";
-			break;
-		case 2:
-			s = "(ackw2) ";
-			break;
-		default:
-			s = "(?) ";
-			break;
-		} s; }),
-		ep->irqs, stat_flg,
-		(stat_flg & UDC_NO_RXPACKET) ? "no_rxpacket " : "",
-		(stat_flg & UDC_MISS_IN) ? "miss_in " : "",
-		(stat_flg & UDC_DATA_FLUSH) ? "data_flush " : "",
-		(stat_flg & UDC_ISO_ERR) ? "iso_err " : "",
-		(stat_flg & UDC_ISO_FIFO_EMPTY) ? "iso_fifo_empty " : "",
-		(stat_flg & UDC_ISO_FIFO_FULL) ? "iso_fifo_full " : "",
-		(stat_flg & UDC_EP_HALTED) ? "HALT " : "",
-		(stat_flg & UDC_STALL) ? "STALL " : "",
-		(stat_flg & UDC_NAK) ? "NAK " : "",
-		(stat_flg & UDC_ACK) ? "ACK " : "",
-		(stat_flg & UDC_FIFO_EN) ? "fifo_en " : "",
-		(stat_flg & UDC_NON_ISO_FIFO_EMPTY) ? "fifo_empty " : "",
-		(stat_flg & UDC_NON_ISO_FIFO_FULL) ? "fifo_full " : "");
-
-	if (list_empty(&ep->queue))
-		seq_printf(s, "\t(queue empty)\n");
-	else
-		list_for_each_entry(req, &ep->queue, queue) {
-			unsigned	length = req->req.actual;
-
-			if (use_dma && buf[0]) {
-				length += ((ep->bEndpointAddress & USB_DIR_IN)
-						? dma_src_len : dma_dest_len)
-					(ep, req->req.dma + length);
-				buf[0] = 0;
-			}
-			seq_printf(s, "\treq %p len %d/%d buf %p\n",
-					&req->req, length,
-					req->req.length, req->req.buf);
-		}
-}
-
-static char *trx_mode(unsigned m, int enabled)
-{
-	switch (m) {
-	case 0:
-		return enabled ? "*6wire" : "unused";
-	case 1:
-		return "4wire";
-	case 2:
-		return "3wire";
-	case 3:
-		return "6wire";
-	default:
-		return "unknown";
-	}
-}
-
-static int proc_otg_show(struct seq_file *s)
-{
-	u32		tmp;
-	u32		trans = 0;
-	char		*ctrl_name = "(UNKNOWN)";
-
-	tmp = omap_readl(OTG_REV);
-	ctrl_name = "tranceiver_ctrl";
-	trans = omap_readw(USB_TRANSCEIVER_CTRL);
-	seq_printf(s, "\nOTG rev %d.%d, %s %05x\n",
-		tmp >> 4, tmp & 0xf, ctrl_name, trans);
-	tmp = omap_readw(OTG_SYSCON_1);
-	seq_printf(s, "otg_syscon1 %08x usb2 %s, usb1 %s, usb0 %s,"
-			FOURBITS "\n", tmp,
-		trx_mode(USB2_TRX_MODE(tmp), trans & CONF_USB2_UNI_R),
-		trx_mode(USB1_TRX_MODE(tmp), trans & CONF_USB1_UNI_R),
-		(USB0_TRX_MODE(tmp) == 0 && !cpu_is_omap1710())
-			? "internal"
-			: trx_mode(USB0_TRX_MODE(tmp), 1),
-		(tmp & OTG_IDLE_EN) ? " !otg" : "",
-		(tmp & HST_IDLE_EN) ? " !host" : "",
-		(tmp & DEV_IDLE_EN) ? " !dev" : "",
-		(tmp & OTG_RESET_DONE) ? " reset_done" : " reset_active");
-	tmp = omap_readl(OTG_SYSCON_2);
-	seq_printf(s, "otg_syscon2 %08x%s" EIGHTBITS
-			" b_ase_brst=%d hmc=%d\n", tmp,
-		(tmp & OTG_EN) ? " otg_en" : "",
-		(tmp & USBX_SYNCHRO) ? " synchro" : "",
-		/* much more SRP stuff */
-		(tmp & SRP_DATA) ? " srp_data" : "",
-		(tmp & SRP_VBUS) ? " srp_vbus" : "",
-		(tmp & OTG_PADEN) ? " otg_paden" : "",
-		(tmp & HMC_PADEN) ? " hmc_paden" : "",
-		(tmp & UHOST_EN) ? " uhost_en" : "",
-		(tmp & HMC_TLLSPEED) ? " tllspeed" : "",
-		(tmp & HMC_TLLATTACH) ? " tllattach" : "",
-		B_ASE_BRST(tmp),
-		OTG_HMC(tmp));
-	tmp = omap_readl(OTG_CTRL);
-	seq_printf(s, "otg_ctrl    %06x" EIGHTBITS EIGHTBITS "%s\n", tmp,
-		(tmp & OTG_ASESSVLD) ? " asess" : "",
-		(tmp & OTG_BSESSEND) ? " bsess_end" : "",
-		(tmp & OTG_BSESSVLD) ? " bsess" : "",
-		(tmp & OTG_VBUSVLD) ? " vbus" : "",
-		(tmp & OTG_ID) ? " id" : "",
-		(tmp & OTG_DRIVER_SEL) ? " DEVICE" : " HOST",
-		(tmp & OTG_A_SETB_HNPEN) ? " a_setb_hnpen" : "",
-		(tmp & OTG_A_BUSREQ) ? " a_bus" : "",
-		(tmp & OTG_B_HNPEN) ? " b_hnpen" : "",
-		(tmp & OTG_B_BUSREQ) ? " b_bus" : "",
-		(tmp & OTG_BUSDROP) ? " busdrop" : "",
-		(tmp & OTG_PULLDOWN) ? " down" : "",
-		(tmp & OTG_PULLUP) ? " up" : "",
-		(tmp & OTG_DRV_VBUS) ? " drv" : "",
-		(tmp & OTG_PD_VBUS) ? " pd_vb" : "",
-		(tmp & OTG_PU_VBUS) ? " pu_vb" : "",
-		(tmp & OTG_PU_ID) ? " pu_id" : ""
-		);
-	tmp = omap_readw(OTG_IRQ_EN);
-	seq_printf(s, "otg_irq_en  %04x" "\n", tmp);
-	tmp = omap_readw(OTG_IRQ_SRC);
-	seq_printf(s, "otg_irq_src %04x" "\n", tmp);
-	tmp = omap_readw(OTG_OUTCTRL);
-	seq_printf(s, "otg_outctrl %04x" "\n", tmp);
-	tmp = omap_readw(OTG_TEST);
-	seq_printf(s, "otg_test    %04x" "\n", tmp);
-	return 0;
-}
-
-static int proc_udc_show(struct seq_file *s, void *_)
-{
-	u32		tmp;
-	struct omap_ep	*ep;
-	unsigned long	flags;
-
-	spin_lock_irqsave(&udc->lock, flags);
-
-	seq_printf(s, "%s, version: " DRIVER_VERSION
-#ifdef	USE_ISO
-		" (iso)"
-#endif
-		"%s\n",
-		driver_desc,
-		use_dma ?  " (dma)" : "");
-
-	tmp = omap_readw(UDC_REV) & 0xff;
-	seq_printf(s,
-		"UDC rev %d.%d, fifo mode %d, gadget %s\n"
-		"hmc %d, transceiver %s\n",
-		tmp >> 4, tmp & 0xf,
-		fifo_mode,
-		udc->driver ? udc->driver->driver.name : "(none)",
-		HMC,
-		udc->transceiver
-			? udc->transceiver->label
-			: (cpu_is_omap1710()
-				? "external" : "(none)"));
-	seq_printf(s, "ULPD control %04x req %04x status %04x\n",
-		omap_readw(ULPD_CLOCK_CTRL),
-		omap_readw(ULPD_SOFT_REQ),
-		omap_readw(ULPD_STATUS_REQ));
-
-	/* OTG controller registers */
-	if (!cpu_is_omap15xx())
-		proc_otg_show(s);
-
-	tmp = omap_readw(UDC_SYSCON1);
-	seq_printf(s, "\nsyscon1     %04x" EIGHTBITS "\n", tmp,
-		(tmp & UDC_CFG_LOCK) ? " cfg_lock" : "",
-		(tmp & UDC_DATA_ENDIAN) ? " data_endian" : "",
-		(tmp & UDC_DMA_ENDIAN) ? " dma_endian" : "",
-		(tmp & UDC_NAK_EN) ? " nak" : "",
-		(tmp & UDC_AUTODECODE_DIS) ? " autodecode_dis" : "",
-		(tmp & UDC_SELF_PWR) ? " self_pwr" : "",
-		(tmp & UDC_SOFF_DIS) ? " soff_dis" : "",
-		(tmp & UDC_PULLUP_EN) ? " PULLUP" : "");
-	/* syscon2 is write-only */
-
-	/* UDC controller registers */
-	if (!(tmp & UDC_PULLUP_EN)) {
-		seq_printf(s, "(suspended)\n");
-		spin_unlock_irqrestore(&udc->lock, flags);
-		return 0;
-	}
-
-	tmp = omap_readw(UDC_DEVSTAT);
-	seq_printf(s, "devstat     %04x" EIGHTBITS "%s%s\n", tmp,
-		(tmp & UDC_B_HNP_ENABLE) ? " b_hnp" : "",
-		(tmp & UDC_A_HNP_SUPPORT) ? " a_hnp" : "",
-		(tmp & UDC_A_ALT_HNP_SUPPORT) ? " a_alt_hnp" : "",
-		(tmp & UDC_R_WK_OK) ? " r_wk_ok" : "",
-		(tmp & UDC_USB_RESET) ? " usb_reset" : "",
-		(tmp & UDC_SUS) ? " SUS" : "",
-		(tmp & UDC_CFG) ? " CFG" : "",
-		(tmp & UDC_ADD) ? " ADD" : "",
-		(tmp & UDC_DEF) ? " DEF" : "",
-		(tmp & UDC_ATT) ? " ATT" : "");
-	seq_printf(s, "sof         %04x\n", omap_readw(UDC_SOF));
-	tmp = omap_readw(UDC_IRQ_EN);
-	seq_printf(s, "irq_en      %04x" FOURBITS "%s\n", tmp,
-		(tmp & UDC_SOF_IE) ? " sof" : "",
-		(tmp & UDC_EPN_RX_IE) ? " epn_rx" : "",
-		(tmp & UDC_EPN_TX_IE) ? " epn_tx" : "",
-		(tmp & UDC_DS_CHG_IE) ? " ds_chg" : "",
-		(tmp & UDC_EP0_IE) ? " ep0" : "");
-	tmp = omap_readw(UDC_IRQ_SRC);
-	seq_printf(s, "irq_src     %04x" EIGHTBITS "%s%s\n", tmp,
-		(tmp & UDC_TXN_DONE) ? " txn_done" : "",
-		(tmp & UDC_RXN_CNT) ? " rxn_cnt" : "",
-		(tmp & UDC_RXN_EOT) ? " rxn_eot" : "",
-		(tmp & UDC_IRQ_SOF) ? " sof" : "",
-		(tmp & UDC_EPN_RX) ? " epn_rx" : "",
-		(tmp & UDC_EPN_TX) ? " epn_tx" : "",
-		(tmp & UDC_DS_CHG) ? " ds_chg" : "",
-		(tmp & UDC_SETUP) ? " setup" : "",
-		(tmp & UDC_EP0_RX) ? " ep0out" : "",
-		(tmp & UDC_EP0_TX) ? " ep0in" : "");
-	if (use_dma) {
-		unsigned i;
-
-		tmp = omap_readw(UDC_DMA_IRQ_EN);
-		seq_printf(s, "dma_irq_en  %04x%s" EIGHTBITS "\n", tmp,
-			(tmp & UDC_TX_DONE_IE(3)) ? " tx2_done" : "",
-			(tmp & UDC_RX_CNT_IE(3)) ? " rx2_cnt" : "",
-			(tmp & UDC_RX_EOT_IE(3)) ? " rx2_eot" : "",
-
-			(tmp & UDC_TX_DONE_IE(2)) ? " tx1_done" : "",
-			(tmp & UDC_RX_CNT_IE(2)) ? " rx1_cnt" : "",
-			(tmp & UDC_RX_EOT_IE(2)) ? " rx1_eot" : "",
-
-			(tmp & UDC_TX_DONE_IE(1)) ? " tx0_done" : "",
-			(tmp & UDC_RX_CNT_IE(1)) ? " rx0_cnt" : "",
-			(tmp & UDC_RX_EOT_IE(1)) ? " rx0_eot" : "");
-
-		tmp = omap_readw(UDC_RXDMA_CFG);
-		seq_printf(s, "rxdma_cfg   %04x\n", tmp);
-		if (tmp) {
-			for (i = 0; i < 3; i++) {
-				if ((tmp & (0x0f << (i * 4))) == 0)
-					continue;
-				seq_printf(s, "rxdma[%d]    %04x\n", i,
-						omap_readw(UDC_RXDMA(i + 1)));
-			}
-		}
-		tmp = omap_readw(UDC_TXDMA_CFG);
-		seq_printf(s, "txdma_cfg   %04x\n", tmp);
-		if (tmp) {
-			for (i = 0; i < 3; i++) {
-				if (!(tmp & (0x0f << (i * 4))))
-					continue;
-				seq_printf(s, "txdma[%d]    %04x\n", i,
-						omap_readw(UDC_TXDMA(i + 1)));
-			}
-		}
-	}
-
-	tmp = omap_readw(UDC_DEVSTAT);
-	if (tmp & UDC_ATT) {
-		proc_ep_show(s, &udc->ep[0]);
-		if (tmp & UDC_ADD) {
-			list_for_each_entry(ep, &udc->gadget.ep_list,
-					ep.ep_list) {
-				if (ep->ep.desc)
-					proc_ep_show(s, ep);
-			}
-		}
-	}
-	spin_unlock_irqrestore(&udc->lock, flags);
-	return 0;
-}
-
-static int proc_udc_open(struct inode *inode, struct file *file)
-{
-	return single_open(file, proc_udc_show, NULL);
-}
-
-static const struct file_operations proc_ops = {
-	.owner		= THIS_MODULE,
-	.open		= proc_udc_open,
-	.read		= seq_read,
-	.llseek		= seq_lseek,
-	.release	= single_release,
-};
-
-static void create_proc_file(void)
-{
-	proc_create(proc_filename, 0, NULL, &proc_ops);
-}
-
-static void remove_proc_file(void)
-{
-	remove_proc_entry(proc_filename, NULL);
-}
-
-#else
-
-static inline void create_proc_file(void) {}
-static inline void remove_proc_file(void) {}
-
-#endif
-
-/*-------------------------------------------------------------------------*/
-
-/* Before this controller can enumerate, we need to pick an endpoint
- * configuration, or "fifo_mode"  That involves allocating 2KB of packet
- * buffer space among the endpoints we'll be operating.
- *
- * NOTE: as of OMAP 1710 ES2.0, writing a new endpoint config when
- * UDC_SYSCON_1.CFG_LOCK is set can now work.  We won't use that
- * capability yet though.
- */
-static unsigned
-omap_ep_setup(char *name, u8 addr, u8 type,
-		unsigned buf, unsigned maxp, int dbuf)
-{
-	struct omap_ep	*ep;
-	u16		epn_rxtx = 0;
-
-	/* OUT endpoints first, then IN */
-	ep = &udc->ep[addr & 0xf];
-	if (addr & USB_DIR_IN)
-		ep += 16;
-
-	/* in case of ep init table bugs */
-	BUG_ON(ep->name[0]);
-
-	/* chip setup ... bit values are same for IN, OUT */
-	if (type == USB_ENDPOINT_XFER_ISOC) {
-		switch (maxp) {
-		case 8:
-			epn_rxtx = 0 << 12;
-			break;
-		case 16:
-			epn_rxtx = 1 << 12;
-			break;
-		case 32:
-			epn_rxtx = 2 << 12;
-			break;
-		case 64:
-			epn_rxtx = 3 << 12;
-			break;
-		case 128:
-			epn_rxtx = 4 << 12;
-			break;
-		case 256:
-			epn_rxtx = 5 << 12;
-			break;
-		case 512:
-			epn_rxtx = 6 << 12;
-			break;
-		default:
-			BUG();
-		}
-		epn_rxtx |= UDC_EPN_RX_ISO;
-		dbuf = 1;
-	} else {
-		/* double-buffering "not supported" on 15xx,
-		 * and ignored for PIO-IN on newer chips
-		 * (for more reliable behavior)
-		 */
-		if (!use_dma || cpu_is_omap15xx())
-			dbuf = 0;
-
-		switch (maxp) {
-		case 8:
-			epn_rxtx = 0 << 12;
-			break;
-		case 16:
-			epn_rxtx = 1 << 12;
-			break;
-		case 32:
-			epn_rxtx = 2 << 12;
-			break;
-		case 64:
-			epn_rxtx = 3 << 12;
-			break;
-		default:
-			BUG();
-		}
-		if (dbuf && addr)
-			epn_rxtx |= UDC_EPN_RX_DB;
-		init_timer(&ep->timer);
-		ep->timer.function = pio_out_timer;
-		ep->timer.data = (unsigned long) ep;
-	}
-	if (addr)
-		epn_rxtx |= UDC_EPN_RX_VALID;
-	BUG_ON(buf & 0x07);
-	epn_rxtx |= buf >> 3;
-
-	DBG("%s addr %02x rxtx %04x maxp %d%s buf %d\n",
-		name, addr, epn_rxtx, maxp, dbuf ? "x2" : "", buf);
-
-	if (addr & USB_DIR_IN)
-		omap_writew(epn_rxtx, UDC_EP_TX(addr & 0xf));
-	else
-		omap_writew(epn_rxtx, UDC_EP_RX(addr));
-
-	/* next endpoint's buffer starts after this one's */
-	buf += maxp;
-	if (dbuf)
-		buf += maxp;
-	BUG_ON(buf > 2048);
-
-	/* set up driver data structures */
-	BUG_ON(strlen(name) >= sizeof ep->name);
-	strlcpy(ep->name, name, sizeof ep->name);
-	INIT_LIST_HEAD(&ep->queue);
-	INIT_LIST_HEAD(&ep->iso);
-	ep->bEndpointAddress = addr;
-	ep->bmAttributes = type;
-	ep->double_buf = dbuf;
-	ep->udc = udc;
-
-	ep->ep.name = ep->name;
-	ep->ep.ops = &omap_ep_ops;
-	ep->maxpacket = maxp;
-	usb_ep_set_maxpacket_limit(&ep->ep, ep->maxpacket);
-	list_add_tail(&ep->ep.ep_list, &udc->gadget.ep_list);
-
-	return buf;
-}
-
-static void omap_udc_release(struct device *dev)
-{
-	complete(udc->done);
-	kfree(udc);
-	udc = NULL;
-}
-
-static int
-omap_udc_setup(struct platform_device *odev, struct usb_phy *xceiv)
-{
-	unsigned	tmp, buf;
-
-	/* abolish any previous hardware state */
-	omap_writew(0, UDC_SYSCON1);
-	omap_writew(0, UDC_IRQ_EN);
-	omap_writew(UDC_IRQ_SRC_MASK, UDC_IRQ_SRC);
-	omap_writew(0, UDC_DMA_IRQ_EN);
-	omap_writew(0, UDC_RXDMA_CFG);
-	omap_writew(0, UDC_TXDMA_CFG);
-
-	/* UDC_PULLUP_EN gates the chip clock */
-	/* OTG_SYSCON_1 |= DEV_IDLE_EN; */
-
-	udc = kzalloc(sizeof(*udc), GFP_KERNEL);
-	if (!udc)
-		return -ENOMEM;
-
-	spin_lock_init(&udc->lock);
-
-	udc->gadget.ops = &omap_gadget_ops;
-	udc->gadget.ep0 = &udc->ep[0].ep;
-	INIT_LIST_HEAD(&udc->gadget.ep_list);
-	INIT_LIST_HEAD(&udc->iso);
-	udc->gadget.speed = USB_SPEED_UNKNOWN;
-	udc->gadget.max_speed = USB_SPEED_FULL;
-	udc->gadget.name = driver_name;
-	udc->transceiver = xceiv;
-
-	/* ep0 is special; put it right after the SETUP buffer */
-	buf = omap_ep_setup("ep0", 0, USB_ENDPOINT_XFER_CONTROL,
-			8 /* after SETUP */, 64 /* maxpacket */, 0);
-	list_del_init(&udc->ep[0].ep.ep_list);
-
-	/* initially disable all non-ep0 endpoints */
-	for (tmp = 1; tmp < 15; tmp++) {
-		omap_writew(0, UDC_EP_RX(tmp));
-		omap_writew(0, UDC_EP_TX(tmp));
-	}
-
-#define OMAP_BULK_EP(name, addr) \
-	buf = omap_ep_setup(name "-bulk", addr, \
-			USB_ENDPOINT_XFER_BULK, buf, 64, 1);
-#define OMAP_INT_EP(name, addr, maxp) \
-	buf = omap_ep_setup(name "-int", addr, \
-			USB_ENDPOINT_XFER_INT, buf, maxp, 0);
-#define OMAP_ISO_EP(name, addr, maxp) \
-	buf = omap_ep_setup(name "-iso", addr, \
-			USB_ENDPOINT_XFER_ISOC, buf, maxp, 1);
-
-	switch (fifo_mode) {
-	case 0:
-		OMAP_BULK_EP("ep1in",  USB_DIR_IN  | 1);
-		OMAP_BULK_EP("ep2out", USB_DIR_OUT | 2);
-		OMAP_INT_EP("ep3in",   USB_DIR_IN  | 3, 16);
-		break;
-	case 1:
-		OMAP_BULK_EP("ep1in",  USB_DIR_IN  | 1);
-		OMAP_BULK_EP("ep2out", USB_DIR_OUT | 2);
-		OMAP_INT_EP("ep9in",   USB_DIR_IN  | 9, 16);
-
-		OMAP_BULK_EP("ep3in",  USB_DIR_IN  | 3);
-		OMAP_BULK_EP("ep4out", USB_DIR_OUT | 4);
-		OMAP_INT_EP("ep10in",  USB_DIR_IN  | 10, 16);
-
-		OMAP_BULK_EP("ep5in",  USB_DIR_IN  | 5);
-		OMAP_BULK_EP("ep5out", USB_DIR_OUT | 5);
-		OMAP_INT_EP("ep11in",  USB_DIR_IN  | 11, 16);
-
-		OMAP_BULK_EP("ep6in",  USB_DIR_IN  | 6);
-		OMAP_BULK_EP("ep6out", USB_DIR_OUT | 6);
-		OMAP_INT_EP("ep12in",  USB_DIR_IN  | 12, 16);
-
-		OMAP_BULK_EP("ep7in",  USB_DIR_IN  | 7);
-		OMAP_BULK_EP("ep7out", USB_DIR_OUT | 7);
-		OMAP_INT_EP("ep13in",  USB_DIR_IN  | 13, 16);
-		OMAP_INT_EP("ep13out", USB_DIR_OUT | 13, 16);
-
-		OMAP_BULK_EP("ep8in",  USB_DIR_IN  | 8);
-		OMAP_BULK_EP("ep8out", USB_DIR_OUT | 8);
-		OMAP_INT_EP("ep14in",  USB_DIR_IN  | 14, 16);
-		OMAP_INT_EP("ep14out", USB_DIR_OUT | 14, 16);
-
-		OMAP_BULK_EP("ep15in",  USB_DIR_IN  | 15);
-		OMAP_BULK_EP("ep15out", USB_DIR_OUT | 15);
-
-		break;
-
-#ifdef	USE_ISO
-	case 2:			/* mixed iso/bulk */
-		OMAP_ISO_EP("ep1in",   USB_DIR_IN  | 1, 256);
-		OMAP_ISO_EP("ep2out",  USB_DIR_OUT | 2, 256);
-		OMAP_ISO_EP("ep3in",   USB_DIR_IN  | 3, 128);
-		OMAP_ISO_EP("ep4out",  USB_DIR_OUT | 4, 128);
-
-		OMAP_INT_EP("ep5in",   USB_DIR_IN  | 5, 16);
-
-		OMAP_BULK_EP("ep6in",  USB_DIR_IN  | 6);
-		OMAP_BULK_EP("ep7out", USB_DIR_OUT | 7);
-		OMAP_INT_EP("ep8in",   USB_DIR_IN  | 8, 16);
-		break;
-	case 3:			/* mixed bulk/iso */
-		OMAP_BULK_EP("ep1in",  USB_DIR_IN  | 1);
-		OMAP_BULK_EP("ep2out", USB_DIR_OUT | 2);
-		OMAP_INT_EP("ep3in",   USB_DIR_IN  | 3, 16);
-
-		OMAP_BULK_EP("ep4in",  USB_DIR_IN  | 4);
-		OMAP_BULK_EP("ep5out", USB_DIR_OUT | 5);
-		OMAP_INT_EP("ep6in",   USB_DIR_IN  | 6, 16);
-
-		OMAP_ISO_EP("ep7in",   USB_DIR_IN  | 7, 256);
-		OMAP_ISO_EP("ep8out",  USB_DIR_OUT | 8, 256);
-		OMAP_INT_EP("ep9in",   USB_DIR_IN  | 9, 16);
-		break;
-#endif
-
-	/* add more modes as needed */
-
-	default:
-		ERR("unsupported fifo_mode #%d\n", fifo_mode);
-		return -ENODEV;
-	}
-	omap_writew(UDC_CFG_LOCK|UDC_SELF_PWR, UDC_SYSCON1);
-	INFO("fifo mode %d, %d bytes not used\n", fifo_mode, 2048 - buf);
-	return 0;
-}
-
-static int omap_udc_probe(struct platform_device *pdev)
-{
-	int			status = -ENODEV;
-	int			hmc;
-	struct usb_phy		*xceiv = NULL;
-	const char		*type = NULL;
-	struct omap_usb_config	*config = dev_get_platdata(&pdev->dev);
-	struct clk		*dc_clk = NULL;
-	struct clk		*hhc_clk = NULL;
-
-	if (cpu_is_omap7xx())
-		use_dma = 0;
-
-	/* NOTE:  "knows" the order of the resources! */
-	if (!request_mem_region(pdev->resource[0].start,
-			pdev->resource[0].end - pdev->resource[0].start + 1,
-			driver_name)) {
-		DBG("request_mem_region failed\n");
-		return -EBUSY;
-	}
-
-	if (cpu_is_omap16xx()) {
-		dc_clk = clk_get(&pdev->dev, "usb_dc_ck");
-		hhc_clk = clk_get(&pdev->dev, "usb_hhc_ck");
-		BUG_ON(IS_ERR(dc_clk) || IS_ERR(hhc_clk));
-		/* can't use omap_udc_enable_clock yet */
-		clk_enable(dc_clk);
-		clk_enable(hhc_clk);
-		udelay(100);
-	}
-
-	if (cpu_is_omap7xx()) {
-		dc_clk = clk_get(&pdev->dev, "usb_dc_ck");
-		hhc_clk = clk_get(&pdev->dev, "l3_ocpi_ck");
-		BUG_ON(IS_ERR(dc_clk) || IS_ERR(hhc_clk));
-		/* can't use omap_udc_enable_clock yet */
-		clk_enable(dc_clk);
-		clk_enable(hhc_clk);
-		udelay(100);
-	}
-
-	INFO("OMAP UDC rev %d.%d%s\n",
-		omap_readw(UDC_REV) >> 4, omap_readw(UDC_REV) & 0xf,
-		config->otg ? ", Mini-AB" : "");
-
-	/* use the mode given to us by board init code */
-	if (cpu_is_omap15xx()) {
-		hmc = HMC_1510;
-		type = "(unknown)";
-
-		if (machine_without_vbus_sense()) {
-			/* just set up software VBUS detect, and then
-			 * later rig it so we always report VBUS.
-			 * FIXME without really sensing VBUS, we can't
-			 * know when to turn PULLUP_EN on/off; and that
-			 * means we always "need" the 48MHz clock.
-			 */
-			u32 tmp = omap_readl(FUNC_MUX_CTRL_0);
-			tmp &= ~VBUS_CTRL_1510;
-			omap_writel(tmp, FUNC_MUX_CTRL_0);
-			tmp |= VBUS_MODE_1510;
-			tmp &= ~VBUS_CTRL_1510;
-			omap_writel(tmp, FUNC_MUX_CTRL_0);
-		}
-	} else {
-		/* The transceiver may package some GPIO logic or handle
-		 * loopback and/or transceiverless setup; if we find one,
-		 * use it.  Except for OTG, we don't _need_ to talk to one;
-		 * but not having one probably means no VBUS detection.
-		 */
-		xceiv = usb_get_phy(USB_PHY_TYPE_USB2);
-		if (!IS_ERR_OR_NULL(xceiv))
-			type = xceiv->label;
-		else if (config->otg) {
-			DBG("OTG requires external transceiver!\n");
-			goto cleanup0;
-		}
-
-		hmc = HMC_1610;
-
-		switch (hmc) {
-		case 0:			/* POWERUP DEFAULT == 0 */
-		case 4:
-		case 12:
-		case 20:
-			if (!cpu_is_omap1710()) {
-				type = "integrated";
-				break;
-			}
-			/* FALL THROUGH */
-		case 3:
-		case 11:
-		case 16:
-		case 19:
-		case 25:
-			if (IS_ERR_OR_NULL(xceiv)) {
-				DBG("external transceiver not registered!\n");
-				type = "unknown";
-			}
-			break;
-		case 21:			/* internal loopback */
-			type = "loopback";
-			break;
-		case 14:			/* transceiverless */
-			if (cpu_is_omap1710())
-				goto bad_on_1710;
-			/* FALL THROUGH */
-		case 13:
-		case 15:
-			type = "no";
-			break;
-
-		default:
-bad_on_1710:
-			ERR("unrecognized UDC HMC mode %d\n", hmc);
-			goto cleanup0;
-		}
-	}
-
-	INFO("hmc mode %d, %s transceiver\n", hmc, type);
-
-	/* a "gadget" abstracts/virtualizes the controller */
-	status = omap_udc_setup(pdev, xceiv);
-	if (status)
-		goto cleanup0;
-
-	xceiv = NULL;
-	/* "udc" is now valid */
-	pullup_disable(udc);
-#if	defined(CONFIG_USB_OHCI_HCD) || defined(CONFIG_USB_OHCI_HCD_MODULE)
-	udc->gadget.is_otg = (config->otg != 0);
-#endif
-
-	/* starting with omap1710 es2.0, clear toggle is a separate bit */
-	if (omap_readw(UDC_REV) >= 0x61)
-		udc->clr_halt = UDC_RESET_EP | UDC_CLRDATA_TOGGLE;
-	else
-		udc->clr_halt = UDC_RESET_EP;
-
-	/* USB general purpose IRQ:  ep0, state changes, dma, etc */
-	status = request_irq(pdev->resource[1].start, omap_udc_irq,
-			0, driver_name, udc);
-	if (status != 0) {
-		ERR("can't get irq %d, err %d\n",
-			(int) pdev->resource[1].start, status);
-		goto cleanup1;
-	}
-
-	/* USB "non-iso" IRQ (PIO for all but ep0) */
-	status = request_irq(pdev->resource[2].start, omap_udc_pio_irq,
-			0, "omap_udc pio", udc);
-	if (status != 0) {
-		ERR("can't get irq %d, err %d\n",
-			(int) pdev->resource[2].start, status);
-		goto cleanup2;
-	}
-#ifdef	USE_ISO
-	status = request_irq(pdev->resource[3].start, omap_udc_iso_irq,
-			0, "omap_udc iso", udc);
-	if (status != 0) {
-		ERR("can't get irq %d, err %d\n",
-			(int) pdev->resource[3].start, status);
-		goto cleanup3;
-	}
-#endif
-	if (cpu_is_omap16xx() || cpu_is_omap7xx()) {
-		udc->dc_clk = dc_clk;
-		udc->hhc_clk = hhc_clk;
-		clk_disable(hhc_clk);
-		clk_disable(dc_clk);
-	}
-
-	create_proc_file();
-	status = usb_add_gadget_udc_release(&pdev->dev, &udc->gadget,
-			omap_udc_release);
-	if (status)
-		goto cleanup4;
-
-	return 0;
-
-cleanup4:
-	remove_proc_file();
-
-#ifdef	USE_ISO
-cleanup3:
-	free_irq(pdev->resource[2].start, udc);
-#endif
-
-cleanup2:
-	free_irq(pdev->resource[1].start, udc);
-
-cleanup1:
-	kfree(udc);
-	udc = NULL;
-
-cleanup0:
-	if (!IS_ERR_OR_NULL(xceiv))
-		usb_put_phy(xceiv);
-
-	if (cpu_is_omap16xx() || cpu_is_omap7xx()) {
-		clk_disable(hhc_clk);
-		clk_disable(dc_clk);
-		clk_put(hhc_clk);
-		clk_put(dc_clk);
-	}
-
-	release_mem_region(pdev->resource[0].start,
-			pdev->resource[0].end - pdev->resource[0].start + 1);
-
-	return status;
-}
-
-static int omap_udc_remove(struct platform_device *pdev)
-{
-	DECLARE_COMPLETION_ONSTACK(done);
-
-	if (!udc)
-		return -ENODEV;
-
-	usb_del_gadget_udc(&udc->gadget);
-	if (udc->driver)
-		return -EBUSY;
-
-	udc->done = &done;
-
-	pullup_disable(udc);
-	if (!IS_ERR_OR_NULL(udc->transceiver)) {
-		usb_put_phy(udc->transceiver);
-		udc->transceiver = NULL;
-	}
-	omap_writew(0, UDC_SYSCON1);
-
-	remove_proc_file();
-
-#ifdef	USE_ISO
-	free_irq(pdev->resource[3].start, udc);
-#endif
-	free_irq(pdev->resource[2].start, udc);
-	free_irq(pdev->resource[1].start, udc);
-
-	if (udc->dc_clk) {
-		if (udc->clk_requested)
-			omap_udc_enable_clock(0);
-		clk_put(udc->hhc_clk);
-		clk_put(udc->dc_clk);
-	}
-
-	release_mem_region(pdev->resource[0].start,
-			pdev->resource[0].end - pdev->resource[0].start + 1);
-
-	wait_for_completion(&done);
-
-	return 0;
-}
-
-/* suspend/resume/wakeup from sysfs (echo > power/state) or when the
- * system is forced into deep sleep
- *
- * REVISIT we should probably reject suspend requests when there's a host
- * session active, rather than disconnecting, at least on boards that can
- * report VBUS irqs (UDC_DEVSTAT.UDC_ATT).  And in any case, we need to
- * make host resumes and VBUS detection trigger OMAP wakeup events; that
- * may involve talking to an external transceiver (e.g. isp1301).
- */
-
-static int omap_udc_suspend(struct platform_device *dev, pm_message_t message)
-{
-	u32	devstat;
-
-	devstat = omap_readw(UDC_DEVSTAT);
-
-	/* we're requesting 48 MHz clock if the pullup is enabled
-	 * (== we're attached to the host) and we're not suspended,
-	 * which would prevent entry to deep sleep...
-	 */
-	if ((devstat & UDC_ATT) != 0 && (devstat & UDC_SUS) == 0) {
-		WARNING("session active; suspend requires disconnect\n");
-		omap_pullup(&udc->gadget, 0);
-	}
-
-	return 0;
-}
-
-static int omap_udc_resume(struct platform_device *dev)
-{
-	DBG("resume + wakeup/SRP\n");
-	omap_pullup(&udc->gadget, 1);
-
-	/* maybe the host would enumerate us if we nudged it */
-	msleep(100);
-	return omap_wakeup(&udc->gadget);
-}
-
-/*-------------------------------------------------------------------------*/
-
-static struct platform_driver udc_driver = {
-	.probe		= omap_udc_probe,
-	.remove		= omap_udc_remove,
-	.suspend	= omap_udc_suspend,
-	.resume		= omap_udc_resume,
-	.driver		= {
-		.owner	= THIS_MODULE,
-		.name	= (char *) driver_name,
-	},
-};
-
-module_platform_driver(udc_driver);
-
-MODULE_DESCRIPTION(DRIVER_DESC);
-MODULE_LICENSE("GPL");
-MODULE_ALIAS("platform:omap_udc");