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, 1823 deletions

diff --git a/drivers/usb/gadget/goku_udc.c b/drivers/usb/gadget/goku_udc.c
deleted file mode 100644
index 6c85839e15ad..000000000000
--- a/drivers/usb/gadget/goku_udc.c
+++ /dev/null
@@ -1,1823 +0,0 @@
-/*
- * Toshiba TC86C001 ("Goku-S") USB Device Controller driver
- *
- * Copyright (C) 2000-2002 Lineo
- *      by Stuart Lynne, Tom Rushworth, and Bruce Balden
- * Copyright (C) 2002 Toshiba Corporation
- * Copyright (C) 2003 MontaVista Software (source@mvista.com)
- *
- * This file is licensed under the terms of the GNU General Public
- * License version 2.  This program is licensed "as is" without any
- * warranty of any kind, whether express or implied.
- */
-
-/*
- * This device has ep0 and three semi-configurable bulk/interrupt endpoints.
- *
- *  - Endpoint numbering is fixed: ep{1,2,3}-bulk
- *  - Gadget drivers can choose ep maxpacket (8/16/32/64)
- *  - Gadget drivers can choose direction (IN, OUT)
- *  - DMA works with ep1 (OUT transfers) and ep2 (IN transfers).
- */
-
-// #define	VERBOSE		/* extra debug messages (success too) */
-// #define	USB_TRACE	/* packet-level success messages */
-
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/pci.h>
-#include <linux/delay.h>
-#include <linux/ioport.h>
-#include <linux/slab.h>
-#include <linux/errno.h>
-#include <linux/timer.h>
-#include <linux/list.h>
-#include <linux/interrupt.h>
-#include <linux/proc_fs.h>
-#include <linux/seq_file.h>
-#include <linux/device.h>
-#include <linux/usb/ch9.h>
-#include <linux/usb/gadget.h>
-#include <linux/prefetch.h>
-
-#include <asm/byteorder.h>
-#include <asm/io.h>
-#include <asm/irq.h>
-#include <asm/unaligned.h>
-
-
-#include "goku_udc.h"
-
-#define	DRIVER_DESC		"TC86C001 USB Device Controller"
-#define	DRIVER_VERSION		"30-Oct 2003"
-
-static const char driver_name [] = "goku_udc";
-static const char driver_desc [] = DRIVER_DESC;
-
-MODULE_AUTHOR("source@mvista.com");
-MODULE_DESCRIPTION(DRIVER_DESC);
-MODULE_LICENSE("GPL");
-
-
-/*
- * IN dma behaves ok under testing, though the IN-dma abort paths don't
- * seem to behave quite as expected.  Used by default.
- *
- * OUT dma documents design problems handling the common "short packet"
- * transfer termination policy; it couldn't be enabled by default, even
- * if the OUT-dma abort problems had a resolution.
- */
-static unsigned use_dma = 1;
-
-#if 0
-//#include <linux/moduleparam.h>
-/* "modprobe goku_udc use_dma=1" etc
- *	0 to disable dma
- *	1 to use IN dma only (normal operation)
- *	2 to use IN and OUT dma
- */
-module_param(use_dma, uint, S_IRUGO);
-#endif
-
-/*-------------------------------------------------------------------------*/
-
-static void nuke(struct goku_ep *, int status);
-
-static inline void
-command(struct goku_udc_regs __iomem *regs, int command, unsigned epnum)
-{
-	writel(COMMAND_EP(epnum) | command, &regs->Command);
-	udelay(300);
-}
-
-static int
-goku_ep_enable(struct usb_ep *_ep, const struct usb_endpoint_descriptor *desc)
-{
-	struct goku_udc	*dev;
-	struct goku_ep	*ep;
-	u32		mode;
-	u16		max;
-	unsigned long	flags;
-
-	ep = container_of(_ep, struct goku_ep, ep);
-	if (!_ep || !desc
-			|| desc->bDescriptorType != USB_DT_ENDPOINT)
-		return -EINVAL;
-	dev = ep->dev;
-	if (ep == &dev->ep[0])
-		return -EINVAL;
-	if (!dev->driver || dev->gadget.speed == USB_SPEED_UNKNOWN)
-		return -ESHUTDOWN;
-	if (ep->num != usb_endpoint_num(desc))
-		return -EINVAL;
-
-	switch (usb_endpoint_type(desc)) {
-	case USB_ENDPOINT_XFER_BULK:
-	case USB_ENDPOINT_XFER_INT:
-		break;
-	default:
-		return -EINVAL;
-	}
-
-	if ((readl(ep->reg_status) & EPxSTATUS_EP_MASK)
-			!= EPxSTATUS_EP_INVALID)
-		return -EBUSY;
-
-	/* enabling the no-toggle interrupt mode would need an api hook */
-	mode = 0;
-	max = get_unaligned_le16(&desc->wMaxPacketSize);
-	switch (max) {
-	case 64:	mode++;
-	case 32:	mode++;
-	case 16:	mode++;
-	case 8:		mode <<= 3;
-			break;
-	default:
-		return -EINVAL;
-	}
-	mode |= 2 << 1;		/* bulk, or intr-with-toggle */
-
-	/* ep1/ep2 dma direction is chosen early; it works in the other
-	 * direction, with pio.  be cautious with out-dma.
-	 */
-	ep->is_in = usb_endpoint_dir_in(desc);
-	if (ep->is_in) {
-		mode |= 1;
-		ep->dma = (use_dma != 0) && (ep->num == UDC_MSTRD_ENDPOINT);
-	} else {
-		ep->dma = (use_dma == 2) && (ep->num == UDC_MSTWR_ENDPOINT);
-		if (ep->dma)
-			DBG(dev, "%s out-dma hides short packets\n",
-				ep->ep.name);
-	}
-
-	spin_lock_irqsave(&ep->dev->lock, flags);
-
-	/* ep1 and ep2 can do double buffering and/or dma */
-	if (ep->num < 3) {
-		struct goku_udc_regs __iomem	*regs = ep->dev->regs;
-		u32				tmp;
-
-		/* double buffer except (for now) with pio in */
-		tmp = ((ep->dma || !ep->is_in)
-				? 0x10	/* double buffered */
-				: 0x11	/* single buffer */
-			) << ep->num;
-		tmp |= readl(&regs->EPxSingle);
-		writel(tmp, &regs->EPxSingle);
-
-		tmp = (ep->dma ? 0x10/*dma*/ : 0x11/*pio*/) << ep->num;
-		tmp |= readl(&regs->EPxBCS);
-		writel(tmp, &regs->EPxBCS);
-	}
-	writel(mode, ep->reg_mode);
-	command(ep->dev->regs, COMMAND_RESET, ep->num);
-	ep->ep.maxpacket = max;
-	ep->stopped = 0;
-	ep->ep.desc = desc;
-	spin_unlock_irqrestore(&ep->dev->lock, flags);
-
-	DBG(dev, "enable %s %s %s maxpacket %u\n", ep->ep.name,
-		ep->is_in ? "IN" : "OUT",
-		ep->dma ? "dma" : "pio",
-		max);
-
-	return 0;
-}
-
-static void ep_reset(struct goku_udc_regs __iomem *regs, struct goku_ep *ep)
-{
-	struct goku_udc		*dev = ep->dev;
-
-	if (regs) {
-		command(regs, COMMAND_INVALID, ep->num);
-		if (ep->num) {
-			if (ep->num == UDC_MSTWR_ENDPOINT)
-				dev->int_enable &= ~(INT_MSTWREND
-							|INT_MSTWRTMOUT);
-			else if (ep->num == UDC_MSTRD_ENDPOINT)
-				dev->int_enable &= ~INT_MSTRDEND;
-			dev->int_enable &= ~INT_EPxDATASET (ep->num);
-		} else
-			dev->int_enable &= ~INT_EP0;
-		writel(dev->int_enable, &regs->int_enable);
-		readl(&regs->int_enable);
-		if (ep->num < 3) {
-			struct goku_udc_regs __iomem	*r = ep->dev->regs;
-			u32				tmp;
-
-			tmp = readl(&r->EPxSingle);
-			tmp &= ~(0x11 << ep->num);
-			writel(tmp, &r->EPxSingle);
-
-			tmp = readl(&r->EPxBCS);
-			tmp &= ~(0x11 << ep->num);
-			writel(tmp, &r->EPxBCS);
-		}
-		/* reset dma in case we're still using it */
-		if (ep->dma) {
-			u32	master;
-
-			master = readl(&regs->dma_master) & MST_RW_BITS;
-			if (ep->num == UDC_MSTWR_ENDPOINT) {
-				master &= ~MST_W_BITS;
-				master |= MST_WR_RESET;
-			} else {
-				master &= ~MST_R_BITS;
-				master |= MST_RD_RESET;
-			}
-			writel(master, &regs->dma_master);
-		}
-	}
-
-	usb_ep_set_maxpacket_limit(&ep->ep, MAX_FIFO_SIZE);
-	ep->ep.desc = NULL;
-	ep->stopped = 1;
-	ep->irqs = 0;
-	ep->dma = 0;
-}
-
-static int goku_ep_disable(struct usb_ep *_ep)
-{
-	struct goku_ep	*ep;
-	struct goku_udc	*dev;
-	unsigned long	flags;
-
-	ep = container_of(_ep, struct goku_ep, ep);
-	if (!_ep || !ep->ep.desc)
-		return -ENODEV;
-	dev = ep->dev;
-	if (dev->ep0state == EP0_SUSPEND)
-		return -EBUSY;
-
-	VDBG(dev, "disable %s\n", _ep->name);
-
-	spin_lock_irqsave(&dev->lock, flags);
-	nuke(ep, -ESHUTDOWN);
-	ep_reset(dev->regs, ep);
-	spin_unlock_irqrestore(&dev->lock, flags);
-
-	return 0;
-}
-
-/*-------------------------------------------------------------------------*/
-
-static struct usb_request *
-goku_alloc_request(struct usb_ep *_ep, gfp_t gfp_flags)
-{
-	struct goku_request	*req;
-
-	if (!_ep)
-		return NULL;
-	req = kzalloc(sizeof *req, gfp_flags);
-	if (!req)
-		return NULL;
-
-	INIT_LIST_HEAD(&req->queue);
-	return &req->req;
-}
-
-static void
-goku_free_request(struct usb_ep *_ep, struct usb_request *_req)
-{
-	struct goku_request	*req;
-
-	if (!_ep || !_req)
-		return;
-
-	req = container_of(_req, struct goku_request, req);
-	WARN_ON(!list_empty(&req->queue));
-	kfree(req);
-}
-
-/*-------------------------------------------------------------------------*/
-
-static void
-done(struct goku_ep *ep, struct goku_request *req, int status)
-{
-	struct goku_udc		*dev;
-	unsigned		stopped = ep->stopped;
-
-	list_del_init(&req->queue);
-
-	if (likely(req->req.status == -EINPROGRESS))
-		req->req.status = status;
-	else
-		status = req->req.status;
-
-	dev = ep->dev;
-
-	if (ep->dma)
-		usb_gadget_unmap_request(&dev->gadget, &req->req, ep->is_in);
-
-#ifndef USB_TRACE
-	if (status && status != -ESHUTDOWN)
-#endif
-		VDBG(dev, "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(&dev->lock);
-	req->req.complete(&ep->ep, &req->req);
-	spin_lock(&dev->lock);
-	ep->stopped = stopped;
-}
-
-/*-------------------------------------------------------------------------*/
-
-static inline int
-write_packet(u32 __iomem *fifo, u8 *buf, struct goku_request *req, unsigned max)
-{
-	unsigned	length, count;
-
-	length = min(req->req.length - req->req.actual, max);
-	req->req.actual += length;
-
-	count = length;
-	while (likely(count--))
-		writel(*buf++, fifo);
-	return length;
-}
-
-// return:  0 = still running, 1 = completed, negative = errno
-static int write_fifo(struct goku_ep *ep, struct goku_request *req)
-{
-	struct goku_udc	*dev = ep->dev;
-	u32		tmp;
-	u8		*buf;
-	unsigned	count;
-	int		is_last;
-
-	tmp = readl(&dev->regs->DataSet);
-	buf = req->req.buf + req->req.actual;
-	prefetch(buf);
-
-	dev = ep->dev;
-	if (unlikely(ep->num == 0 && dev->ep0state != EP0_IN))
-		return -EL2HLT;
-
-	/* NOTE:  just single-buffered PIO-IN for now.  */
-	if (unlikely((tmp & DATASET_A(ep->num)) != 0))
-		return 0;
-
-	/* clear our "packet available" irq */
-	if (ep->num != 0)
-		writel(~INT_EPxDATASET(ep->num), &dev->regs->int_status);
-
-	count = write_packet(ep->reg_fifo, buf, req, ep->ep.maxpacket);
-
-	/* last packet often short (sometimes a zlp, especially on ep0) */
-	if (unlikely(count != ep->ep.maxpacket)) {
-		writel(~(1<<ep->num), &dev->regs->EOP);
-		if (ep->num == 0) {
-			dev->ep[0].stopped = 1;
-			dev->ep0state = EP0_STATUS;
-		}
-		is_last = 1;
-	} else {
-		if (likely(req->req.length != req->req.actual)
-				|| req->req.zero)
-			is_last = 0;
-		else
-			is_last = 1;
-	}
-#if 0		/* printk seemed to trash is_last...*/
-//#ifdef USB_TRACE
-	VDBG(dev, "wrote %s %u bytes%s IN %u left %p\n",
-		ep->ep.name, count, is_last ? "/last" : "",
-		req->req.length - req->req.actual, req);
-#endif
-
-	/* requests complete when all IN data is in the FIFO,
-	 * or sometimes later, if a zlp was needed.
-	 */
-	if (is_last) {
-		done(ep, req, 0);
-		return 1;
-	}
-
-	return 0;
-}
-
-static int read_fifo(struct goku_ep *ep, struct goku_request *req)
-{
-	struct goku_udc_regs __iomem	*regs;
-	u32				size, set;
-	u8				*buf;
-	unsigned			bufferspace, is_short, dbuff;
-
-	regs = ep->dev->regs;
-top:
-	buf = req->req.buf + req->req.actual;
-	prefetchw(buf);
-
-	if (unlikely(ep->num == 0 && ep->dev->ep0state != EP0_OUT))
-		return -EL2HLT;
-
-	dbuff = (ep->num == 1 || ep->num == 2);
-	do {
-		/* ack dataset irq matching the status we'll handle */
-		if (ep->num != 0)
-			writel(~INT_EPxDATASET(ep->num), &regs->int_status);
-
-		set = readl(&regs->DataSet) & DATASET_AB(ep->num);
-		size = readl(&regs->EPxSizeLA[ep->num]);
-		bufferspace = req->req.length - req->req.actual;
-
-		/* usually do nothing without an OUT packet */
-		if (likely(ep->num != 0 || bufferspace != 0)) {
-			if (unlikely(set == 0))
-				break;
-			/* use ep1/ep2 double-buffering for OUT */
-			if (!(size & PACKET_ACTIVE))
-				size = readl(&regs->EPxSizeLB[ep->num]);
-			if (!(size & PACKET_ACTIVE))	/* "can't happen" */
-				break;
-			size &= DATASIZE;	/* EPxSizeH == 0 */
-
-		/* ep0out no-out-data case for set_config, etc */
-		} else
-			size = 0;
-
-		/* read all bytes from this packet */
-		req->req.actual += size;
-		is_short = (size < ep->ep.maxpacket);
-#ifdef USB_TRACE
-		VDBG(ep->dev, "read %s %u bytes%s OUT req %p %u/%u\n",
-			ep->ep.name, size, is_short ? "/S" : "",
-			req, req->req.actual, req->req.length);
-#endif
-		while (likely(size-- != 0)) {
-			u8	byte = (u8) readl(ep->reg_fifo);
-
-			if (unlikely(bufferspace == 0)) {
-				/* this happens when the driver's buffer
-				 * is smaller than what the host sent.
-				 * discard the extra data in this packet.
-				 */
-				if (req->req.status != -EOVERFLOW)
-					DBG(ep->dev, "%s overflow %u\n",
-						ep->ep.name, size);
-				req->req.status = -EOVERFLOW;
-			} else {
-				*buf++ = byte;
-				bufferspace--;
-			}
-		}
-
-		/* completion */
-		if (unlikely(is_short || req->req.actual == req->req.length)) {
-			if (unlikely(ep->num == 0)) {
-				/* non-control endpoints now usable? */
-				if (ep->dev->req_config)
-					writel(ep->dev->configured
-							? USBSTATE_CONFIGURED
-							: 0,
-						&regs->UsbState);
-				/* ep0out status stage */
-				writel(~(1<<0), &regs->EOP);
-				ep->stopped = 1;
-				ep->dev->ep0state = EP0_STATUS;
-			}
-			done(ep, req, 0);
-
-			/* empty the second buffer asap */
-			if (dbuff && !list_empty(&ep->queue)) {
-				req = list_entry(ep->queue.next,
-						struct goku_request, queue);
-				goto top;
-			}
-			return 1;
-		}
-	} while (dbuff);
-	return 0;
-}
-
-static inline void
-pio_irq_enable(struct goku_udc *dev,
-		struct goku_udc_regs __iomem *regs, int epnum)
-{
-	dev->int_enable |= INT_EPxDATASET (epnum);
-	writel(dev->int_enable, &regs->int_enable);
-	/* write may still be posted */
-}
-
-static inline void
-pio_irq_disable(struct goku_udc *dev,
-		struct goku_udc_regs __iomem *regs, int epnum)
-{
-	dev->int_enable &= ~INT_EPxDATASET (epnum);
-	writel(dev->int_enable, &regs->int_enable);
-	/* write may still be posted */
-}
-
-static inline void
-pio_advance(struct goku_ep *ep)
-{
-	struct goku_request	*req;
-
-	if (unlikely(list_empty (&ep->queue)))
-		return;
-	req = list_entry(ep->queue.next, struct goku_request, queue);
-	(ep->is_in ? write_fifo : read_fifo)(ep, req);
-}
-
-
-/*-------------------------------------------------------------------------*/
-
-// return:  0 = q running, 1 = q stopped, negative = errno
-static int start_dma(struct goku_ep *ep, struct goku_request *req)
-{
-	struct goku_udc_regs __iomem	*regs = ep->dev->regs;
-	u32				master;
-	u32				start = req->req.dma;
-	u32				end = start + req->req.length - 1;
-
-	master = readl(&regs->dma_master) & MST_RW_BITS;
-
-	/* re-init the bits affecting IN dma; careful with zlps */
-	if (likely(ep->is_in)) {
-		if (unlikely(master & MST_RD_ENA)) {
-			DBG (ep->dev, "start, IN active dma %03x!!\n",
-				master);
-//			return -EL2HLT;
-		}
-		writel(end, &regs->in_dma_end);
-		writel(start, &regs->in_dma_start);
-
-		master &= ~MST_R_BITS;
-		if (unlikely(req->req.length == 0))
-			master = MST_RD_ENA | MST_RD_EOPB;
-		else if ((req->req.length % ep->ep.maxpacket) != 0
-					|| req->req.zero)
-			master = MST_RD_ENA | MST_EOPB_ENA;
-		else
-			master = MST_RD_ENA | MST_EOPB_DIS;
-
-		ep->dev->int_enable |= INT_MSTRDEND;
-
-	/* Goku DMA-OUT merges short packets, which plays poorly with
-	 * protocols where short packets mark the transfer boundaries.
-	 * The chip supports a nonstandard policy with INT_MSTWRTMOUT,
-	 * ending transfers after 3 SOFs; we don't turn it on.
-	 */
-	} else {
-		if (unlikely(master & MST_WR_ENA)) {
-			DBG (ep->dev, "start, OUT active dma %03x!!\n",
-				master);
-//			return -EL2HLT;
-		}
-		writel(end, &regs->out_dma_end);
-		writel(start, &regs->out_dma_start);
-
-		master &= ~MST_W_BITS;
-		master |= MST_WR_ENA | MST_TIMEOUT_DIS;
-
-		ep->dev->int_enable |= INT_MSTWREND|INT_MSTWRTMOUT;
-	}
-
-	writel(master, &regs->dma_master);
-	writel(ep->dev->int_enable, &regs->int_enable);
-	return 0;
-}
-
-static void dma_advance(struct goku_udc *dev, struct goku_ep *ep)
-{
-	struct goku_request		*req;
-	struct goku_udc_regs __iomem	*regs = ep->dev->regs;
-	u32				master;
-
-	master = readl(&regs->dma_master);
-
-	if (unlikely(list_empty(&ep->queue))) {
-stop:
-		if (ep->is_in)
-			dev->int_enable &= ~INT_MSTRDEND;
-		else
-			dev->int_enable &= ~(INT_MSTWREND|INT_MSTWRTMOUT);
-		writel(dev->int_enable, &regs->int_enable);
-		return;
-	}
-	req = list_entry(ep->queue.next, struct goku_request, queue);
-
-	/* normal hw dma completion (not abort) */
-	if (likely(ep->is_in)) {
-		if (unlikely(master & MST_RD_ENA))
-			return;
-		req->req.actual = readl(&regs->in_dma_current);
-	} else {
-		if (unlikely(master & MST_WR_ENA))
-			return;
-
-		/* hardware merges short packets, and also hides packet
-		 * overruns.  a partial packet MAY be in the fifo here.
-		 */
-		req->req.actual = readl(&regs->out_dma_current);
-	}
-	req->req.actual -= req->req.dma;
-	req->req.actual++;
-
-#ifdef USB_TRACE
-	VDBG(dev, "done %s %s dma, %u/%u bytes, req %p\n",
-		ep->ep.name, ep->is_in ? "IN" : "OUT",
-		req->req.actual, req->req.length, req);
-#endif
-	done(ep, req, 0);
-	if (list_empty(&ep->queue))
-		goto stop;
-	req = list_entry(ep->queue.next, struct goku_request, queue);
-	(void) start_dma(ep, req);
-}
-
-static void abort_dma(struct goku_ep *ep, int status)
-{
-	struct goku_udc_regs __iomem	*regs = ep->dev->regs;
-	struct goku_request		*req;
-	u32				curr, master;
-
-	/* NAK future host requests, hoping the implicit delay lets the
-	 * dma engine finish reading (or writing) its latest packet and
-	 * empty the dma buffer (up to 16 bytes).
-	 *
-	 * This avoids needing to clean up a partial packet in the fifo;
-	 * we can't do that for IN without side effects to HALT and TOGGLE.
-	 */
-	command(regs, COMMAND_FIFO_DISABLE, ep->num);
-	req = list_entry(ep->queue.next, struct goku_request, queue);
-	master = readl(&regs->dma_master) & MST_RW_BITS;
-
-	/* FIXME using these resets isn't usably documented. this may
-	 * not work unless it's followed by disabling the endpoint.
-	 *
-	 * FIXME the OUT reset path doesn't even behave consistently.
-	 */
-	if (ep->is_in) {
-		if (unlikely((readl(&regs->dma_master) & MST_RD_ENA) == 0))
-			goto finished;
-		curr = readl(&regs->in_dma_current);
-
-		writel(curr, &regs->in_dma_end);
-		writel(curr, &regs->in_dma_start);
-
-		master &= ~MST_R_BITS;
-		master |= MST_RD_RESET;
-		writel(master, &regs->dma_master);
-
-		if (readl(&regs->dma_master) & MST_RD_ENA)
-			DBG(ep->dev, "IN dma active after reset!\n");
-
-	} else {
-		if (unlikely((readl(&regs->dma_master) & MST_WR_ENA) == 0))
-			goto finished;
-		curr = readl(&regs->out_dma_current);
-
-		writel(curr, &regs->out_dma_end);
-		writel(curr, &regs->out_dma_start);
-
-		master &= ~MST_W_BITS;
-		master |= MST_WR_RESET;
-		writel(master, &regs->dma_master);
-
-		if (readl(&regs->dma_master) & MST_WR_ENA)
-			DBG(ep->dev, "OUT dma active after reset!\n");
-	}
-	req->req.actual = (curr - req->req.dma) + 1;
-	req->req.status = status;
-
-	VDBG(ep->dev, "%s %s %s %d/%d\n", __func__, ep->ep.name,
-		ep->is_in ? "IN" : "OUT",
-		req->req.actual, req->req.length);
-
-	command(regs, COMMAND_FIFO_ENABLE, ep->num);
-
-	return;
-
-finished:
-	/* dma already completed; no abort needed */
-	command(regs, COMMAND_FIFO_ENABLE, ep->num);
-	req->req.actual = req->req.length;
-	req->req.status = 0;
-}
-
-/*-------------------------------------------------------------------------*/
-
-static int
-goku_queue(struct usb_ep *_ep, struct usb_request *_req, gfp_t gfp_flags)
-{
-	struct goku_request	*req;
-	struct goku_ep		*ep;
-	struct goku_udc		*dev;
-	unsigned long		flags;
-	int			status;
-
-	/* always require a cpu-view buffer so pio works */
-	req = container_of(_req, struct goku_request, req);
-	if (unlikely(!_req || !_req->complete
-			|| !_req->buf || !list_empty(&req->queue)))
-		return -EINVAL;
-	ep = container_of(_ep, struct goku_ep, ep);
-	if (unlikely(!_ep || (!ep->ep.desc && ep->num != 0)))
-		return -EINVAL;
-	dev = ep->dev;
-	if (unlikely(!dev->driver || dev->gadget.speed == USB_SPEED_UNKNOWN))
-		return -ESHUTDOWN;
-
-	/* can't touch registers when suspended */
-	if (dev->ep0state == EP0_SUSPEND)
-		return -EBUSY;
-
-	/* set up dma mapping in case the caller didn't */
-	if (ep->dma) {
-		status = usb_gadget_map_request(&dev->gadget, &req->req,
-				ep->is_in);
-		if (status)
-			return status;
-	}
-
-#ifdef USB_TRACE
-	VDBG(dev, "%s queue req %p, len %u buf %p\n",
-			_ep->name, _req, _req->length, _req->buf);
-#endif
-
-	spin_lock_irqsave(&dev->lock, flags);
-
-	_req->status = -EINPROGRESS;
-	_req->actual = 0;
-
-	/* for ep0 IN without premature status, zlp is required and
-	 * writing EOP starts the status stage (OUT).
-	 */
-	if (unlikely(ep->num == 0 && ep->is_in))
-		_req->zero = 1;
-
-	/* kickstart this i/o queue? */
-	status = 0;
-	if (list_empty(&ep->queue) && likely(!ep->stopped)) {
-		/* dma:  done after dma completion IRQ (or error)
-		 * pio:  done after last fifo operation
-		 */
-		if (ep->dma)
-			status = start_dma(ep, req);
-		else
-			status = (ep->is_in ? write_fifo : read_fifo)(ep, req);
-
-		if (unlikely(status != 0)) {
-			if (status > 0)
-				status = 0;
-			req = NULL;
-		}
-
-	} /* else pio or dma irq handler advances the queue. */
-
-	if (likely(req != NULL))
-		list_add_tail(&req->queue, &ep->queue);
-
-	if (likely(!list_empty(&ep->queue))
-			&& likely(ep->num != 0)
-			&& !ep->dma
-			&& !(dev->int_enable & INT_EPxDATASET (ep->num)))
-		pio_irq_enable(dev, dev->regs, ep->num);
-
-	spin_unlock_irqrestore(&dev->lock, flags);
-
-	/* pci writes may still be posted */
-	return status;
-}
-
-/* dequeue ALL requests */
-static void nuke(struct goku_ep *ep, int status)
-{
-	struct goku_request	*req;
-
-	ep->stopped = 1;
-	if (list_empty(&ep->queue))
-		return;
-	if (ep->dma)
-		abort_dma(ep, status);
-	while (!list_empty(&ep->queue)) {
-		req = list_entry(ep->queue.next, struct goku_request, queue);
-		done(ep, req, status);
-	}
-}
-
-/* dequeue JUST ONE request */
-static int goku_dequeue(struct usb_ep *_ep, struct usb_request *_req)
-{
-	struct goku_request	*req;
-	struct goku_ep		*ep;
-	struct goku_udc		*dev;
-	unsigned long		flags;
-
-	ep = container_of(_ep, struct goku_ep, ep);
-	if (!_ep || !_req || (!ep->ep.desc && ep->num != 0))
-		return -EINVAL;
-	dev = ep->dev;
-	if (!dev->driver)
-		return -ESHUTDOWN;
-
-	/* we can't touch (dma) registers when suspended */
-	if (dev->ep0state == EP0_SUSPEND)
-		return -EBUSY;
-
-	VDBG(dev, "%s %s %s %s %p\n", __func__, _ep->name,
-		ep->is_in ? "IN" : "OUT",
-		ep->dma ? "dma" : "pio",
-		_req);
-
-	spin_lock_irqsave(&dev->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 (&dev->lock, flags);
-		return -EINVAL;
-	}
-
-	if (ep->dma && ep->queue.next == &req->queue && !ep->stopped) {
-		abort_dma(ep, -ECONNRESET);
-		done(ep, req, -ECONNRESET);
-		dma_advance(dev, ep);
-	} else if (!list_empty(&req->queue))
-		done(ep, req, -ECONNRESET);
-	else
-		req = NULL;
-	spin_unlock_irqrestore(&dev->lock, flags);
-
-	return req ? 0 : -EOPNOTSUPP;
-}
-
-/*-------------------------------------------------------------------------*/
-
-static void goku_clear_halt(struct goku_ep *ep)
-{
-	// assert (ep->num !=0)
-	VDBG(ep->dev, "%s clear halt\n", ep->ep.name);
-	command(ep->dev->regs, COMMAND_SETDATA0, ep->num);
-	command(ep->dev->regs, COMMAND_STALL_CLEAR, ep->num);
-	if (ep->stopped) {
-		ep->stopped = 0;
-		if (ep->dma) {
-			struct goku_request	*req;
-
-			if (list_empty(&ep->queue))
-				return;
-			req = list_entry(ep->queue.next, struct goku_request,
-						queue);
-			(void) start_dma(ep, req);
-		} else
-			pio_advance(ep);
-	}
-}
-
-static int goku_set_halt(struct usb_ep *_ep, int value)
-{
-	struct goku_ep	*ep;
-	unsigned long	flags;
-	int		retval = 0;
-
-	if (!_ep)
-		return -ENODEV;
-	ep = container_of (_ep, struct goku_ep, ep);
-
-	if (ep->num == 0) {
-		if (value) {
-			ep->dev->ep0state = EP0_STALL;
-			ep->dev->ep[0].stopped = 1;
-		} else
-			return -EINVAL;
-
-	/* don't change EPxSTATUS_EP_INVALID to READY */
-	} else if (!ep->ep.desc) {
-		DBG(ep->dev, "%s %s inactive?\n", __func__, ep->ep.name);
-		return -EINVAL;
-	}
-
-	spin_lock_irqsave(&ep->dev->lock, flags);
-	if (!list_empty(&ep->queue))
-		retval = -EAGAIN;
-	else if (ep->is_in && value
-			/* data in (either) packet buffer? */
-			&& (readl(&ep->dev->regs->DataSet)
-					& DATASET_AB(ep->num)))
-		retval = -EAGAIN;
-	else if (!value)
-		goku_clear_halt(ep);
-	else {
-		ep->stopped = 1;
-		VDBG(ep->dev, "%s set halt\n", ep->ep.name);
-		command(ep->dev->regs, COMMAND_STALL, ep->num);
-		readl(ep->reg_status);
-	}
-	spin_unlock_irqrestore(&ep->dev->lock, flags);
-	return retval;
-}
-
-static int goku_fifo_status(struct usb_ep *_ep)
-{
-	struct goku_ep			*ep;
-	struct goku_udc_regs __iomem	*regs;
-	u32				size;
-
-	if (!_ep)
-		return -ENODEV;
-	ep = container_of(_ep, struct goku_ep, ep);
-
-	/* size is only reported sanely for OUT */
-	if (ep->is_in)
-		return -EOPNOTSUPP;
-
-	/* ignores 16-byte dma buffer; SizeH == 0 */
-	regs = ep->dev->regs;
-	size = readl(&regs->EPxSizeLA[ep->num]) & DATASIZE;
-	size += readl(&regs->EPxSizeLB[ep->num]) & DATASIZE;
-	VDBG(ep->dev, "%s %s %u\n", __func__, ep->ep.name, size);
-	return size;
-}
-
-static void goku_fifo_flush(struct usb_ep *_ep)
-{
-	struct goku_ep			*ep;
-	struct goku_udc_regs __iomem	*regs;
-	u32				size;
-
-	if (!_ep)
-		return;
-	ep = container_of(_ep, struct goku_ep, ep);
-	VDBG(ep->dev, "%s %s\n", __func__, ep->ep.name);
-
-	/* don't change EPxSTATUS_EP_INVALID to READY */
-	if (!ep->ep.desc && ep->num != 0) {
-		DBG(ep->dev, "%s %s inactive?\n", __func__, ep->ep.name);
-		return;
-	}
-
-	regs = ep->dev->regs;
-	size = readl(&regs->EPxSizeLA[ep->num]);
-	size &= DATASIZE;
-
-	/* Non-desirable behavior:  FIFO_CLEAR also clears the
-	 * endpoint halt feature.  For OUT, we _could_ just read
-	 * the bytes out (PIO, if !ep->dma); for in, no choice.
-	 */
-	if (size)
-		command(regs, COMMAND_FIFO_CLEAR, ep->num);
-}
-
-static struct usb_ep_ops goku_ep_ops = {
-	.enable		= goku_ep_enable,
-	.disable	= goku_ep_disable,
-
-	.alloc_request	= goku_alloc_request,
-	.free_request	= goku_free_request,
-
-	.queue		= goku_queue,
-	.dequeue	= goku_dequeue,
-
-	.set_halt	= goku_set_halt,
-	.fifo_status	= goku_fifo_status,
-	.fifo_flush	= goku_fifo_flush,
-};
-
-/*-------------------------------------------------------------------------*/
-
-static int goku_get_frame(struct usb_gadget *_gadget)
-{
-	return -EOPNOTSUPP;
-}
-
-static int goku_udc_start(struct usb_gadget *g,
-		struct usb_gadget_driver *driver);
-static int goku_udc_stop(struct usb_gadget *g,
-		struct usb_gadget_driver *driver);
-
-static const struct usb_gadget_ops goku_ops = {
-	.get_frame	= goku_get_frame,
-	.udc_start	= goku_udc_start,
-	.udc_stop	= goku_udc_stop,
-	// no remote wakeup
-	// not selfpowered
-};
-
-/*-------------------------------------------------------------------------*/
-
-static inline const char *dmastr(void)
-{
-	if (use_dma == 0)
-		return "(dma disabled)";
-	else if (use_dma == 2)
-		return "(dma IN and OUT)";
-	else
-		return "(dma IN)";
-}
-
-#ifdef CONFIG_USB_GADGET_DEBUG_FILES
-
-static const char proc_node_name [] = "driver/udc";
-
-#define FOURBITS "%s%s%s%s"
-#define EIGHTBITS FOURBITS FOURBITS
-
-static void dump_intmask(struct seq_file *m, const char *label, u32 mask)
-{
-	/* int_status is the same format ... */
-	seq_printf(m,
-		"%s %05X =" FOURBITS EIGHTBITS EIGHTBITS "\n",
-		label, mask,
-		(mask & INT_PWRDETECT) ? " power" : "",
-		(mask & INT_SYSERROR) ? " sys" : "",
-		(mask & INT_MSTRDEND) ? " in-dma" : "",
-		(mask & INT_MSTWRTMOUT) ? " wrtmo" : "",
-
-		(mask & INT_MSTWREND) ? " out-dma" : "",
-		(mask & INT_MSTWRSET) ? " wrset" : "",
-		(mask & INT_ERR) ? " err" : "",
-		(mask & INT_SOF) ? " sof" : "",
-
-		(mask & INT_EP3NAK) ? " ep3nak" : "",
-		(mask & INT_EP2NAK) ? " ep2nak" : "",
-		(mask & INT_EP1NAK) ? " ep1nak" : "",
-		(mask & INT_EP3DATASET) ? " ep3" : "",
-
-		(mask & INT_EP2DATASET) ? " ep2" : "",
-		(mask & INT_EP1DATASET) ? " ep1" : "",
-		(mask & INT_STATUSNAK) ? " ep0snak" : "",
-		(mask & INT_STATUS) ? " ep0status" : "",
-
-		(mask & INT_SETUP) ? " setup" : "",
-		(mask & INT_ENDPOINT0) ? " ep0" : "",
-		(mask & INT_USBRESET) ? " reset" : "",
-		(mask & INT_SUSPEND) ? " suspend" : "");
-}
-
-
-static int udc_proc_read(struct seq_file *m, void *v)
-{
-	struct goku_udc			*dev = m->private;
-	struct goku_udc_regs __iomem	*regs = dev->regs;
-	unsigned long			flags;
-	int				i, is_usb_connected;
-	u32				tmp;
-
-	local_irq_save(flags);
-
-	/* basic device status */
-	tmp = readl(&regs->power_detect);
-	is_usb_connected = tmp & PW_DETECT;
-	seq_printf(m,
-		"%s - %s\n"
-		"%s version: %s %s\n"
-		"Gadget driver: %s\n"
-		"Host %s, %s\n"
-		"\n",
-		pci_name(dev->pdev), driver_desc,
-		driver_name, DRIVER_VERSION, dmastr(),
-		dev->driver ? dev->driver->driver.name : "(none)",
-		is_usb_connected
-			? ((tmp & PW_PULLUP) ? "full speed" : "powered")
-			: "disconnected",
-		({const char *state;
-		switch(dev->ep0state){
-		case EP0_DISCONNECT:	state = "ep0_disconnect"; break;
-		case EP0_IDLE:		state = "ep0_idle"; break;
-		case EP0_IN:		state = "ep0_in"; break;
-		case EP0_OUT:		state = "ep0_out"; break;
-		case EP0_STATUS:	state = "ep0_status"; break;
-		case EP0_STALL:		state = "ep0_stall"; break;
-		case EP0_SUSPEND:	state = "ep0_suspend"; break;
-		default:		state = "ep0_?"; break;
-		} state; })
-		);
-
-	dump_intmask(m, "int_status", readl(&regs->int_status));
-	dump_intmask(m, "int_enable", readl(&regs->int_enable));
-
-	if (!is_usb_connected || !dev->driver || (tmp & PW_PULLUP) == 0)
-		goto done;
-
-	/* registers for (active) device and ep0 */
-	if (seq_printf(m, "\nirqs %lu\ndataset %02x "
-			"single.bcs %02x.%02x state %x addr %u\n",
-			dev->irqs, readl(&regs->DataSet),
-			readl(&regs->EPxSingle), readl(&regs->EPxBCS),
-			readl(&regs->UsbState),
-			readl(&regs->address)) < 0)
-		goto done;
-
-	tmp = readl(&regs->dma_master);
-	if (seq_printf(m,
-		"dma %03X =" EIGHTBITS "%s %s\n", tmp,
-		(tmp & MST_EOPB_DIS) ? " eopb-" : "",
-		(tmp & MST_EOPB_ENA) ? " eopb+" : "",
-		(tmp & MST_TIMEOUT_DIS) ? " tmo-" : "",
-		(tmp & MST_TIMEOUT_ENA) ? " tmo+" : "",
-
-		(tmp & MST_RD_EOPB) ? " eopb" : "",
-		(tmp & MST_RD_RESET) ? " in_reset" : "",
-		(tmp & MST_WR_RESET) ? " out_reset" : "",
-		(tmp & MST_RD_ENA) ? " IN" : "",
-
-		(tmp & MST_WR_ENA) ? " OUT" : "",
-		(tmp & MST_CONNECTION)
-			? "ep1in/ep2out"
-			: "ep1out/ep2in") < 0)
-		goto done;
-
-	/* dump endpoint queues */
-	for (i = 0; i < 4; i++) {
-		struct goku_ep		*ep = &dev->ep [i];
-		struct goku_request	*req;
-
-		if (i && !ep->ep.desc)
-			continue;
-
-		tmp = readl(ep->reg_status);
-		if (seq_printf(m,
-			"%s %s max %u %s, irqs %lu, "
-			"status %02x (%s) " FOURBITS "\n",
-			ep->ep.name,
-			ep->is_in ? "in" : "out",
-			ep->ep.maxpacket,
-			ep->dma ? "dma" : "pio",
-			ep->irqs,
-			tmp, ({ char *s;
-			switch (tmp & EPxSTATUS_EP_MASK) {
-			case EPxSTATUS_EP_READY:
-				s = "ready"; break;
-			case EPxSTATUS_EP_DATAIN:
-				s = "packet"; break;
-			case EPxSTATUS_EP_FULL:
-				s = "full"; break;
-			case EPxSTATUS_EP_TX_ERR:	// host will retry
-				s = "tx_err"; break;
-			case EPxSTATUS_EP_RX_ERR:
-				s = "rx_err"; break;
-			case EPxSTATUS_EP_BUSY:		/* ep0 only */
-				s = "busy"; break;
-			case EPxSTATUS_EP_STALL:
-				s = "stall"; break;
-			case EPxSTATUS_EP_INVALID:	// these "can't happen"
-				s = "invalid"; break;
-			default:
-				s = "?"; break;
-			} s; }),
-			(tmp & EPxSTATUS_TOGGLE) ? "data1" : "data0",
-			(tmp & EPxSTATUS_SUSPEND) ? " suspend" : "",
-			(tmp & EPxSTATUS_FIFO_DISABLE) ? " disable" : "",
-			(tmp & EPxSTATUS_STAGE_ERROR) ? " ep0stat" : ""
-			) < 0)
-			goto done;
-
-		if (list_empty(&ep->queue)) {
-			if (seq_puts(m, "\t(nothing queued)\n") < 0)
-				goto done;
-			continue;
-		}
-		list_for_each_entry(req, &ep->queue, queue) {
-			if (ep->dma && req->queue.prev == &ep->queue) {
-				if (i == UDC_MSTRD_ENDPOINT)
-					tmp = readl(&regs->in_dma_current);
-				else
-					tmp = readl(&regs->out_dma_current);
-				tmp -= req->req.dma;
-				tmp++;
-			} else
-				tmp = req->req.actual;
-
-			if (seq_printf(m,
-				"\treq %p len %u/%u buf %p\n",
-				&req->req, tmp, req->req.length,
-				req->req.buf) < 0)
-				goto done;
-		}
-	}
-
-done:
-	local_irq_restore(flags);
-	return 0;
-}
-
-/*
- * seq_file wrappers for procfile show routines.
- */
-static int udc_proc_open(struct inode *inode, struct file *file)
-{
-	return single_open(file, udc_proc_read, PDE_DATA(file_inode(file)));
-}
-
-static const struct file_operations udc_proc_fops = {
-	.open		= udc_proc_open,
-	.read		= seq_read,
-	.llseek		= seq_lseek,
-	.release	= single_release,
-};
-
-#endif	/* CONFIG_USB_GADGET_DEBUG_FILES */
-
-/*-------------------------------------------------------------------------*/
-
-static void udc_reinit (struct goku_udc *dev)
-{
-	static char *names [] = { "ep0", "ep1-bulk", "ep2-bulk", "ep3-bulk" };
-
-	unsigned i;
-
-	INIT_LIST_HEAD (&dev->gadget.ep_list);
-	dev->gadget.ep0 = &dev->ep [0].ep;
-	dev->gadget.speed = USB_SPEED_UNKNOWN;
-	dev->ep0state = EP0_DISCONNECT;
-	dev->irqs = 0;
-
-	for (i = 0; i < 4; i++) {
-		struct goku_ep	*ep = &dev->ep[i];
-
-		ep->num = i;
-		ep->ep.name = names[i];
-		ep->reg_fifo = &dev->regs->ep_fifo [i];
-		ep->reg_status = &dev->regs->ep_status [i];
-		ep->reg_mode = &dev->regs->ep_mode[i];
-
-		ep->ep.ops = &goku_ep_ops;
-		list_add_tail (&ep->ep.ep_list, &dev->gadget.ep_list);
-		ep->dev = dev;
-		INIT_LIST_HEAD (&ep->queue);
-
-		ep_reset(NULL, ep);
-	}
-
-	dev->ep[0].reg_mode = NULL;
-	usb_ep_set_maxpacket_limit(&dev->ep[0].ep, MAX_EP0_SIZE);
-	list_del_init (&dev->ep[0].ep.ep_list);
-}
-
-static void udc_reset(struct goku_udc *dev)
-{
-	struct goku_udc_regs __iomem	*regs = dev->regs;
-
-	writel(0, &regs->power_detect);
-	writel(0, &regs->int_enable);
-	readl(&regs->int_enable);
-	dev->int_enable = 0;
-
-	/* deassert reset, leave USB D+ at hi-Z (no pullup)
-	 * don't let INT_PWRDETECT sequence begin
-	 */
-	udelay(250);
-	writel(PW_RESETB, &regs->power_detect);
-	readl(&regs->int_enable);
-}
-
-static void ep0_start(struct goku_udc *dev)
-{
-	struct goku_udc_regs __iomem	*regs = dev->regs;
-	unsigned			i;
-
-	VDBG(dev, "%s\n", __func__);
-
-	udc_reset(dev);
-	udc_reinit (dev);
-	//writel(MST_EOPB_ENA | MST_TIMEOUT_ENA, &regs->dma_master);
-
-	/* hw handles set_address, set_feature, get_status; maybe more */
-	writel(   G_REQMODE_SET_INTF | G_REQMODE_GET_INTF
-		| G_REQMODE_SET_CONF | G_REQMODE_GET_CONF
-		| G_REQMODE_GET_DESC
-		| G_REQMODE_CLEAR_FEAT
-		, &regs->reqmode);
-
-	for (i = 0; i < 4; i++)
-		dev->ep[i].irqs = 0;
-
-	/* can't modify descriptors after writing UsbReady */
-	for (i = 0; i < DESC_LEN; i++)
-		writel(0, &regs->descriptors[i]);
-	writel(0, &regs->UsbReady);
-
-	/* expect ep0 requests when the host drops reset */
-	writel(PW_RESETB | PW_PULLUP, &regs->power_detect);
-	dev->int_enable = INT_DEVWIDE | INT_EP0;
-	writel(dev->int_enable, &dev->regs->int_enable);
-	readl(&regs->int_enable);
-	dev->gadget.speed = USB_SPEED_FULL;
-	dev->ep0state = EP0_IDLE;
-}
-
-static void udc_enable(struct goku_udc *dev)
-{
-	/* start enumeration now, or after power detect irq */
-	if (readl(&dev->regs->power_detect) & PW_DETECT)
-		ep0_start(dev);
-	else {
-		DBG(dev, "%s\n", __func__);
-		dev->int_enable = INT_PWRDETECT;
-		writel(dev->int_enable, &dev->regs->int_enable);
-	}
-}
-
-/*-------------------------------------------------------------------------*/
-
-/* keeping it simple:
- * - one bus driver, initted first;
- * - one function driver, initted second
- */
-
-/* when a driver is successfully registered, it will receive
- * control requests including set_configuration(), which enables
- * non-control requests.  then usb traffic follows until a
- * disconnect is reported.  then a host may connect again, or
- * the driver might get unbound.
- */
-static int goku_udc_start(struct usb_gadget *g,
-		struct usb_gadget_driver *driver)
-{
-	struct goku_udc	*dev = to_goku_udc(g);
-
-	/* hook up the driver */
-	driver->driver.bus = NULL;
-	dev->driver = driver;
-
-	/*
-	 * then enable host detection and ep0; and we're ready
-	 * for set_configuration as well as eventual disconnect.
-	 */
-	udc_enable(dev);
-
-	return 0;
-}
-
-static void stop_activity(struct goku_udc *dev)
-{
-	unsigned	i;
-
-	DBG (dev, "%s\n", __func__);
-
-	/* disconnect gadget driver after quiesceing hw and the driver */
-	udc_reset (dev);
-	for (i = 0; i < 4; i++)
-		nuke(&dev->ep [i], -ESHUTDOWN);
-
-	if (dev->driver)
-		udc_enable(dev);
-}
-
-static int goku_udc_stop(struct usb_gadget *g,
-		struct usb_gadget_driver *driver)
-{
-	struct goku_udc	*dev = to_goku_udc(g);
-	unsigned long	flags;
-
-	spin_lock_irqsave(&dev->lock, flags);
-	dev->driver = NULL;
-	stop_activity(dev);
-	spin_unlock_irqrestore(&dev->lock, flags);
-
-	return 0;
-}
-
-/*-------------------------------------------------------------------------*/
-
-static void ep0_setup(struct goku_udc *dev)
-{
-	struct goku_udc_regs __iomem	*regs = dev->regs;
-	struct usb_ctrlrequest		ctrl;
-	int				tmp;
-
-	/* read SETUP packet and enter DATA stage */
-	ctrl.bRequestType = readl(&regs->bRequestType);
-	ctrl.bRequest = readl(&regs->bRequest);
-	ctrl.wValue  = cpu_to_le16((readl(&regs->wValueH)  << 8)
-					| readl(&regs->wValueL));
-	ctrl.wIndex  = cpu_to_le16((readl(&regs->wIndexH)  << 8)
-					| readl(&regs->wIndexL));
-	ctrl.wLength = cpu_to_le16((readl(&regs->wLengthH) << 8)
-					| readl(&regs->wLengthL));
-	writel(0, &regs->SetupRecv);
-
-	nuke(&dev->ep[0], 0);
-	dev->ep[0].stopped = 0;
-	if (likely(ctrl.bRequestType & USB_DIR_IN)) {
-		dev->ep[0].is_in = 1;
-		dev->ep0state = EP0_IN;
-		/* detect early status stages */
-		writel(ICONTROL_STATUSNAK, &dev->regs->IntControl);
-	} else {
-		dev->ep[0].is_in = 0;
-		dev->ep0state = EP0_OUT;
-
-		/* NOTE:  CLEAR_FEATURE is done in software so that we can
-		 * synchronize transfer restarts after bulk IN stalls.  data
-		 * won't even enter the fifo until the halt is cleared.
-		 */
-		switch (ctrl.bRequest) {
-		case USB_REQ_CLEAR_FEATURE:
-			switch (ctrl.bRequestType) {
-			case USB_RECIP_ENDPOINT:
-				tmp = le16_to_cpu(ctrl.wIndex) & 0x0f;
-				/* active endpoint */
-				if (tmp > 3 ||
-				    (!dev->ep[tmp].ep.desc && tmp != 0))
-					goto stall;
-				if (ctrl.wIndex & cpu_to_le16(
-						USB_DIR_IN)) {
-					if (!dev->ep[tmp].is_in)
-						goto stall;
-				} else {
-					if (dev->ep[tmp].is_in)
-						goto stall;
-				}
-				if (ctrl.wValue != cpu_to_le16(
-						USB_ENDPOINT_HALT))
-					goto stall;
-				if (tmp)
-					goku_clear_halt(&dev->ep[tmp]);
-succeed:
-				/* start ep0out status stage */
-				writel(~(1<<0), &regs->EOP);
-				dev->ep[0].stopped = 1;
-				dev->ep0state = EP0_STATUS;
-				return;
-			case USB_RECIP_DEVICE:
-				/* device remote wakeup: always clear */
-				if (ctrl.wValue != cpu_to_le16(1))
-					goto stall;
-				VDBG(dev, "clear dev remote wakeup\n");
-				goto succeed;
-			case USB_RECIP_INTERFACE:
-				goto stall;
-			default:		/* pass to gadget driver */
-				break;
-			}
-			break;
-		default:
-			break;
-		}
-	}
-
-#ifdef USB_TRACE
-	VDBG(dev, "SETUP %02x.%02x v%04x i%04x l%04x\n",
-		ctrl.bRequestType, ctrl.bRequest,
-		le16_to_cpu(ctrl.wValue), le16_to_cpu(ctrl.wIndex),
-		le16_to_cpu(ctrl.wLength));
-#endif
-
-	/* hw wants to know when we're configured (or not) */
-	dev->req_config = (ctrl.bRequest == USB_REQ_SET_CONFIGURATION
-				&& ctrl.bRequestType == USB_RECIP_DEVICE);
-	if (unlikely(dev->req_config))
-		dev->configured = (ctrl.wValue != cpu_to_le16(0));
-
-	/* delegate everything to the gadget driver.
-	 * it may respond after this irq handler returns.
-	 */
-	spin_unlock (&dev->lock);
-	tmp = dev->driver->setup(&dev->gadget, &ctrl);
-	spin_lock (&dev->lock);
-	if (unlikely(tmp < 0)) {
-stall:
-#ifdef USB_TRACE
-		VDBG(dev, "req %02x.%02x protocol STALL; err %d\n",
-				ctrl.bRequestType, ctrl.bRequest, tmp);
-#endif
-		command(regs, COMMAND_STALL, 0);
-		dev->ep[0].stopped = 1;
-		dev->ep0state = EP0_STALL;
-	}
-
-	/* expect at least one data or status stage irq */
-}
-
-#define ACK(irqbit) { \
-		stat &= ~irqbit; \
-		writel(~irqbit, &regs->int_status); \
-		handled = 1; \
-		}
-
-static irqreturn_t goku_irq(int irq, void *_dev)
-{
-	struct goku_udc			*dev = _dev;
-	struct goku_udc_regs __iomem	*regs = dev->regs;
-	struct goku_ep			*ep;
-	u32				stat, handled = 0;
-	unsigned			i, rescans = 5;
-
-	spin_lock(&dev->lock);
-
-rescan:
-	stat = readl(&regs->int_status) & dev->int_enable;
-        if (!stat)
-		goto done;
-	dev->irqs++;
-
-	/* device-wide irqs */
-	if (unlikely(stat & INT_DEVWIDE)) {
-		if (stat & INT_SYSERROR) {
-			ERROR(dev, "system error\n");
-			stop_activity(dev);
-			stat = 0;
-			handled = 1;
-			// FIXME have a neater way to prevent re-enumeration
-			dev->driver = NULL;
-			goto done;
-		}
-		if (stat & INT_PWRDETECT) {
-			writel(~stat, &regs->int_status);
-			if (readl(&dev->regs->power_detect) & PW_DETECT) {
-				VDBG(dev, "connect\n");
-				ep0_start(dev);
-			} else {
-				DBG(dev, "disconnect\n");
-				if (dev->gadget.speed == USB_SPEED_FULL)
-					stop_activity(dev);
-				dev->ep0state = EP0_DISCONNECT;
-				dev->int_enable = INT_DEVWIDE;
-				writel(dev->int_enable, &dev->regs->int_enable);
-			}
-			stat = 0;
-			handled = 1;
-			goto done;
-		}
-		if (stat & INT_SUSPEND) {
-			ACK(INT_SUSPEND);
-			if (readl(&regs->ep_status[0]) & EPxSTATUS_SUSPEND) {
-				switch (dev->ep0state) {
-				case EP0_DISCONNECT:
-				case EP0_SUSPEND:
-					goto pm_next;
-				default:
-					break;
-				}
-				DBG(dev, "USB suspend\n");
-				dev->ep0state = EP0_SUSPEND;
-				if (dev->gadget.speed != USB_SPEED_UNKNOWN
-						&& dev->driver
-						&& dev->driver->suspend) {
-					spin_unlock(&dev->lock);
-					dev->driver->suspend(&dev->gadget);
-					spin_lock(&dev->lock);
-				}
-			} else {
-				if (dev->ep0state != EP0_SUSPEND) {
-					DBG(dev, "bogus USB resume %d\n",
-						dev->ep0state);
-					goto pm_next;
-				}
-				DBG(dev, "USB resume\n");
-				dev->ep0state = EP0_IDLE;
-				if (dev->gadget.speed != USB_SPEED_UNKNOWN
-						&& dev->driver
-						&& dev->driver->resume) {
-					spin_unlock(&dev->lock);
-					dev->driver->resume(&dev->gadget);
-					spin_lock(&dev->lock);
-				}
-			}
-		}
-pm_next:
-		if (stat & INT_USBRESET) {		/* hub reset done */
-			ACK(INT_USBRESET);
-			INFO(dev, "USB reset done, gadget %s\n",
-				dev->driver->driver.name);
-		}
-		// and INT_ERR on some endpoint's crc/bitstuff/... problem
-	}
-
-	/* progress ep0 setup, data, or status stages.
-	 * no transition {EP0_STATUS, EP0_STALL} --> EP0_IDLE; saves irqs
-	 */
-	if (stat & INT_SETUP) {
-		ACK(INT_SETUP);
-		dev->ep[0].irqs++;
-		ep0_setup(dev);
-	}
-        if (stat & INT_STATUSNAK) {
-		ACK(INT_STATUSNAK|INT_ENDPOINT0);
-		if (dev->ep0state == EP0_IN) {
-			ep = &dev->ep[0];
-			ep->irqs++;
-			nuke(ep, 0);
-			writel(~(1<<0), &regs->EOP);
-			dev->ep0state = EP0_STATUS;
-		}
-	}
-        if (stat & INT_ENDPOINT0) {
-		ACK(INT_ENDPOINT0);
-		ep = &dev->ep[0];
-		ep->irqs++;
-		pio_advance(ep);
-        }
-
-	/* dma completion */
-        if (stat & INT_MSTRDEND) {	/* IN */
-		ACK(INT_MSTRDEND);
-		ep = &dev->ep[UDC_MSTRD_ENDPOINT];
-		ep->irqs++;
-		dma_advance(dev, ep);
-        }
-        if (stat & INT_MSTWREND) {	/* OUT */
-		ACK(INT_MSTWREND);
-		ep = &dev->ep[UDC_MSTWR_ENDPOINT];
-		ep->irqs++;
-		dma_advance(dev, ep);
-        }
-        if (stat & INT_MSTWRTMOUT) {	/* OUT */
-		ACK(INT_MSTWRTMOUT);
-		ep = &dev->ep[UDC_MSTWR_ENDPOINT];
-		ep->irqs++;
-		ERROR(dev, "%s write timeout ?\n", ep->ep.name);
-		// reset dma? then dma_advance()
-        }
-
-	/* pio */
-	for (i = 1; i < 4; i++) {
-		u32		tmp = INT_EPxDATASET(i);
-
-		if (!(stat & tmp))
-			continue;
-		ep = &dev->ep[i];
-		pio_advance(ep);
-		if (list_empty (&ep->queue))
-			pio_irq_disable(dev, regs, i);
-		stat &= ~tmp;
-		handled = 1;
-		ep->irqs++;
-	}
-
-	if (rescans--)
-		goto rescan;
-
-done:
-	(void)readl(&regs->int_enable);
-	spin_unlock(&dev->lock);
-	if (stat)
-		DBG(dev, "unhandled irq status: %05x (%05x, %05x)\n", stat,
-				readl(&regs->int_status), dev->int_enable);
-	return IRQ_RETVAL(handled);
-}
-
-#undef ACK
-
-/*-------------------------------------------------------------------------*/
-
-static void gadget_release(struct device *_dev)
-{
-	struct goku_udc	*dev = dev_get_drvdata(_dev);
-
-	kfree(dev);
-}
-
-/* tear down the binding between this driver and the pci device */
-
-static void goku_remove(struct pci_dev *pdev)
-{
-	struct goku_udc		*dev = pci_get_drvdata(pdev);
-
-	DBG(dev, "%s\n", __func__);
-
-	usb_del_gadget_udc(&dev->gadget);
-
-	BUG_ON(dev->driver);
-
-#ifdef CONFIG_USB_GADGET_DEBUG_FILES
-	remove_proc_entry(proc_node_name, NULL);
-#endif
-	if (dev->regs)
-		udc_reset(dev);
-	if (dev->got_irq)
-		free_irq(pdev->irq, dev);
-	if (dev->regs)
-		iounmap(dev->regs);
-	if (dev->got_region)
-		release_mem_region(pci_resource_start (pdev, 0),
-				pci_resource_len (pdev, 0));
-	if (dev->enabled)
-		pci_disable_device(pdev);
-
-	dev->regs = NULL;
-
-	INFO(dev, "unbind\n");
-}
-
-/* wrap this driver around the specified pci device, but
- * don't respond over USB until a gadget driver binds to us.
- */
-
-static int goku_probe(struct pci_dev *pdev, const struct pci_device_id *id)
-{
-	struct goku_udc		*dev = NULL;
-	unsigned long		resource, len;
-	void __iomem		*base = NULL;
-	int			retval;
-
-	if (!pdev->irq) {
-		printk(KERN_ERR "Check PCI %s IRQ setup!\n", pci_name(pdev));
-		retval = -ENODEV;
-		goto err;
-	}
-
-	/* alloc, and start init */
-	dev = kzalloc (sizeof *dev, GFP_KERNEL);
-	if (dev == NULL){
-		pr_debug("enomem %s\n", pci_name(pdev));
-		retval = -ENOMEM;
-		goto err;
-	}
-
-	spin_lock_init(&dev->lock);
-	dev->pdev = pdev;
-	dev->gadget.ops = &goku_ops;
-	dev->gadget.max_speed = USB_SPEED_FULL;
-
-	/* the "gadget" abstracts/virtualizes the controller */
-	dev->gadget.name = driver_name;
-
-	/* now all the pci goodies ... */
-	retval = pci_enable_device(pdev);
-	if (retval < 0) {
-		DBG(dev, "can't enable, %d\n", retval);
-		goto err;
-	}
-	dev->enabled = 1;
-
-	resource = pci_resource_start(pdev, 0);
-	len = pci_resource_len(pdev, 0);
-	if (!request_mem_region(resource, len, driver_name)) {
-		DBG(dev, "controller already in use\n");
-		retval = -EBUSY;
-		goto err;
-	}
-	dev->got_region = 1;
-
-	base = ioremap_nocache(resource, len);
-	if (base == NULL) {
-		DBG(dev, "can't map memory\n");
-		retval = -EFAULT;
-		goto err;
-	}
-	dev->regs = (struct goku_udc_regs __iomem *) base;
-
-	pci_set_drvdata(pdev, dev);
-	INFO(dev, "%s\n", driver_desc);
-	INFO(dev, "version: " DRIVER_VERSION " %s\n", dmastr());
-	INFO(dev, "irq %d, pci mem %p\n", pdev->irq, base);
-
-	/* init to known state, then setup irqs */
-	udc_reset(dev);
-	udc_reinit (dev);
-	if (request_irq(pdev->irq, goku_irq, IRQF_SHARED,
-			driver_name, dev) != 0) {
-		DBG(dev, "request interrupt %d failed\n", pdev->irq);
-		retval = -EBUSY;
-		goto err;
-	}
-	dev->got_irq = 1;
-	if (use_dma)
-		pci_set_master(pdev);
-
-
-#ifdef CONFIG_USB_GADGET_DEBUG_FILES
-	proc_create_data(proc_node_name, 0, NULL, &udc_proc_fops, dev);
-#endif
-
-	retval = usb_add_gadget_udc_release(&pdev->dev, &dev->gadget,
-			gadget_release);
-	if (retval)
-		goto err;
-
-	return 0;
-
-err:
-	if (dev)
-		goku_remove (pdev);
-	return retval;
-}
-
-
-/*-------------------------------------------------------------------------*/
-
-static const struct pci_device_id pci_ids[] = { {
-	.class =	((PCI_CLASS_SERIAL_USB << 8) | 0xfe),
-	.class_mask =	~0,
-	.vendor =	0x102f,		/* Toshiba */
-	.device =	0x0107,		/* this UDC */
-	.subvendor =	PCI_ANY_ID,
-	.subdevice =	PCI_ANY_ID,
-
-}, { /* end: all zeroes */ }
-};
-MODULE_DEVICE_TABLE (pci, pci_ids);
-
-static struct pci_driver goku_pci_driver = {
-	.name =		(char *) driver_name,
-	.id_table =	pci_ids,
-
-	.probe =	goku_probe,
-	.remove =	goku_remove,
-
-	/* FIXME add power management support */
-};
-
-module_pci_driver(goku_pci_driver);