usb: dwc2/s3c-hsotg: move s3c-hsotg into dwc2 directory

Moves the s3c-hsotg driver into the dwc2 directory and uses the
dwc2 defines in hw.h. Renames s3c-hsotg.c to gadget.c.

NOTE: You can build both host and peripheral as a dynamically
linked module, but be aware that if you insmod dwc2_gadget, then
rmmod it, then insmod dwc2 and dwc2_platform for host mode, this
will not work. As the step to rmmod dwc2_gadget.ko will turn off
the clock to the USB IP. The dwc2 host driver currently does not
look to turn on a clock yet. A patch to fix that will be coming
soon.

Signed-off-by: Dinh Nguyen <dinguyen@altera.com>
[ jh,rb - For gadget part only: ]
Tested-by: Jingoo Han <jg1.han@samsung.com>
Tested-by: Robert Baldyga <r.baldyga@samsung.com>
[ pz: Folded Kconfig/Makefile changes, which were originally in
  a separate patch, into this one, to avoid a build breakage.
  Modified Kconfig/Makefile changes a bit. Tested host part only. ]
Signed-off-by: Paul Zimmerman <paulz@synopsys.com>
Acked-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 0 insertions, 3853 deletions

diff --git a/drivers/usb/gadget/s3c-hsotg.c b/drivers/usb/gadget/s3c-hsotg.c
deleted file mode 100644
index 2a9cb67..0000000
--- a/drivers/usb/gadget/s3c-hsotg.c
+++ /dev/null
@@ -1,3853 +0,0 @@
-/**
- * linux/drivers/usb/gadget/s3c-hsotg.c
- *
- * Copyright (c) 2011 Samsung Electronics Co., Ltd.
- *		http://www.samsung.com
- *
- * Copyright 2008 Openmoko, Inc.
- * Copyright 2008 Simtec Electronics
- *      Ben Dooks <ben@simtec.co.uk>
- *      http://armlinux.simtec.co.uk/
- *
- * S3C USB2.0 High-speed / OtG driver
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- */
-
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/spinlock.h>
-#include <linux/interrupt.h>
-#include <linux/platform_device.h>
-#include <linux/dma-mapping.h>
-#include <linux/debugfs.h>
-#include <linux/seq_file.h>
-#include <linux/delay.h>
-#include <linux/io.h>
-#include <linux/slab.h>
-#include <linux/clk.h>
-#include <linux/regulator/consumer.h>
-#include <linux/of_platform.h>
-#include <linux/phy/phy.h>
-
-#include <linux/usb/ch9.h>
-#include <linux/usb/gadget.h>
-#include <linux/usb/phy.h>
-#include <linux/platform_data/s3c-hsotg.h>
-
-#include "s3c-hsotg.h"
-
-static const char * const s3c_hsotg_supply_names[] = {
-	"vusb_d",		/* digital USB supply, 1.2V */
-	"vusb_a",		/* analog USB supply, 1.1V */
-};
-
-/*
- * EP0_MPS_LIMIT
- *
- * Unfortunately there seems to be a limit of the amount of data that can
- * be transferred by IN transactions on EP0. This is either 127 bytes or 3
- * packets (which practically means 1 packet and 63 bytes of data) when the
- * MPS is set to 64.
- *
- * This means if we are wanting to move >127 bytes of data, we need to
- * split the transactions up, but just doing one packet at a time does
- * not work (this may be an implicit DATA0 PID on first packet of the
- * transaction) and doing 2 packets is outside the controller's limits.
- *
- * If we try to lower the MPS size for EP0, then no transfers work properly
- * for EP0, and the system will fail basic enumeration. As no cause for this
- * has currently been found, we cannot support any large IN transfers for
- * EP0.
- */
-#define EP0_MPS_LIMIT	64
-
-struct s3c_hsotg;
-struct s3c_hsotg_req;
-
-/**
- * struct s3c_hsotg_ep - driver endpoint definition.
- * @ep: The gadget layer representation of the endpoint.
- * @name: The driver generated name for the endpoint.
- * @queue: Queue of requests for this endpoint.
- * @parent: Reference back to the parent device structure.
- * @req: The current request that the endpoint is processing. This is
- *       used to indicate an request has been loaded onto the endpoint
- *       and has yet to be completed (maybe due to data move, or simply
- *	 awaiting an ack from the core all the data has been completed).
- * @debugfs: File entry for debugfs file for this endpoint.
- * @lock: State lock to protect contents of endpoint.
- * @dir_in: Set to true if this endpoint is of the IN direction, which
- *	    means that it is sending data to the Host.
- * @index: The index for the endpoint registers.
- * @mc: Multi Count - number of transactions per microframe
- * @interval - Interval for periodic endpoints
- * @name: The name array passed to the USB core.
- * @halted: Set if the endpoint has been halted.
- * @periodic: Set if this is a periodic ep, such as Interrupt
- * @isochronous: Set if this is a isochronous ep
- * @sent_zlp: Set if we've sent a zero-length packet.
- * @total_data: The total number of data bytes done.
- * @fifo_size: The size of the FIFO (for periodic IN endpoints)
- * @fifo_load: The amount of data loaded into the FIFO (periodic IN)
- * @last_load: The offset of data for the last start of request.
- * @size_loaded: The last loaded size for DxEPTSIZE for periodic IN
- *
- * This is the driver's state for each registered enpoint, allowing it
- * to keep track of transactions that need doing. Each endpoint has a
- * lock to protect the state, to try and avoid using an overall lock
- * for the host controller as much as possible.
- *
- * For periodic IN endpoints, we have fifo_size and fifo_load to try
- * and keep track of the amount of data in the periodic FIFO for each
- * of these as we don't have a status register that tells us how much
- * is in each of them. (note, this may actually be useless information
- * as in shared-fifo mode periodic in acts like a single-frame packet
- * buffer than a fifo)
- */
-struct s3c_hsotg_ep {
-	struct usb_ep		ep;
-	struct list_head	queue;
-	struct s3c_hsotg	*parent;
-	struct s3c_hsotg_req	*req;
-	struct dentry		*debugfs;
-
-
-	unsigned long		total_data;
-	unsigned int		size_loaded;
-	unsigned int		last_load;
-	unsigned int		fifo_load;
-	unsigned short		fifo_size;
-
-	unsigned char		dir_in;
-	unsigned char		index;
-	unsigned char		mc;
-	unsigned char		interval;
-
-	unsigned int		halted:1;
-	unsigned int		periodic:1;
-	unsigned int		isochronous:1;
-	unsigned int		sent_zlp:1;
-
-	char			name[10];
-};
-
-/**
- * struct s3c_hsotg - driver state.
- * @dev: The parent device supplied to the probe function
- * @driver: USB gadget driver
- * @phy: The otg phy transceiver structure for phy control.
- * @uphy: The otg phy transceiver structure for old USB phy control.
- * @plat: The platform specific configuration data. This can be removed once
- * all SoCs support usb transceiver.
- * @regs: The memory area mapped for accessing registers.
- * @irq: The IRQ number we are using
- * @supplies: Definition of USB power supplies
- * @phyif: PHY interface width
- * @dedicated_fifos: Set if the hardware has dedicated IN-EP fifos.
- * @num_of_eps: Number of available EPs (excluding EP0)
- * @debug_root: root directrory for debugfs.
- * @debug_file: main status file for debugfs.
- * @debug_fifo: FIFO status file for debugfs.
- * @ep0_reply: Request used for ep0 reply.
- * @ep0_buff: Buffer for EP0 reply data, if needed.
- * @ctrl_buff: Buffer for EP0 control requests.
- * @ctrl_req: Request for EP0 control packets.
- * @setup: NAK management for EP0 SETUP
- * @last_rst: Time of last reset
- * @eps: The endpoints being supplied to the gadget framework
- */
-struct s3c_hsotg {
-	struct device		 *dev;
-	struct usb_gadget_driver *driver;
-	struct phy		 *phy;
-	struct usb_phy		 *uphy;
-	struct s3c_hsotg_plat	 *plat;
-
-	spinlock_t              lock;
-
-	void __iomem		*regs;
-	int			irq;
-	struct clk		*clk;
-
-	struct regulator_bulk_data supplies[ARRAY_SIZE(s3c_hsotg_supply_names)];
-
-	u32			phyif;
-	unsigned int		dedicated_fifos:1;
-	unsigned char           num_of_eps;
-
-	struct dentry		*debug_root;
-	struct dentry		*debug_file;
-	struct dentry		*debug_fifo;
-
-	struct usb_request	*ep0_reply;
-	struct usb_request	*ctrl_req;
-	u8			ep0_buff[8];
-	u8			ctrl_buff[8];
-
-	struct usb_gadget	gadget;
-	unsigned int		setup;
-	unsigned long           last_rst;
-	struct s3c_hsotg_ep	*eps;
-};
-
-/**
- * struct s3c_hsotg_req - data transfer request
- * @req: The USB gadget request
- * @queue: The list of requests for the endpoint this is queued for.
- * @in_progress: Has already had size/packets written to core
- * @mapped: DMA buffer for this request has been mapped via dma_map_single().
- */
-struct s3c_hsotg_req {
-	struct usb_request	req;
-	struct list_head	queue;
-	unsigned char		in_progress;
-	unsigned char		mapped;
-};
-
-/* conversion functions */
-static inline struct s3c_hsotg_req *our_req(struct usb_request *req)
-{
-	return container_of(req, struct s3c_hsotg_req, req);
-}
-
-static inline struct s3c_hsotg_ep *our_ep(struct usb_ep *ep)
-{
-	return container_of(ep, struct s3c_hsotg_ep, ep);
-}
-
-static inline struct s3c_hsotg *to_hsotg(struct usb_gadget *gadget)
-{
-	return container_of(gadget, struct s3c_hsotg, gadget);
-}
-
-static inline void __orr32(void __iomem *ptr, u32 val)
-{
-	writel(readl(ptr) | val, ptr);
-}
-
-static inline void __bic32(void __iomem *ptr, u32 val)
-{
-	writel(readl(ptr) & ~val, ptr);
-}
-
-/* forward decleration of functions */
-static void s3c_hsotg_dump(struct s3c_hsotg *hsotg);
-
-/**
- * using_dma - return the DMA status of the driver.
- * @hsotg: The driver state.
- *
- * Return true if we're using DMA.
- *
- * Currently, we have the DMA support code worked into everywhere
- * that needs it, but the AMBA DMA implementation in the hardware can
- * only DMA from 32bit aligned addresses. This means that gadgets such
- * as the CDC Ethernet cannot work as they often pass packets which are
- * not 32bit aligned.
- *
- * Unfortunately the choice to use DMA or not is global to the controller
- * and seems to be only settable when the controller is being put through
- * a core reset. This means we either need to fix the gadgets to take
- * account of DMA alignment, or add bounce buffers (yuerk).
- *
- * Until this issue is sorted out, we always return 'false'.
- */
-static inline bool using_dma(struct s3c_hsotg *hsotg)
-{
-	return false;	/* support is not complete */
-}
-
-/**
- * s3c_hsotg_en_gsint - enable one or more of the general interrupt
- * @hsotg: The device state
- * @ints: A bitmask of the interrupts to enable
- */
-static void s3c_hsotg_en_gsint(struct s3c_hsotg *hsotg, u32 ints)
-{
-	u32 gsintmsk = readl(hsotg->regs + GINTMSK);
-	u32 new_gsintmsk;
-
-	new_gsintmsk = gsintmsk | ints;
-
-	if (new_gsintmsk != gsintmsk) {
-		dev_dbg(hsotg->dev, "gsintmsk now 0x%08x\n", new_gsintmsk);
-		writel(new_gsintmsk, hsotg->regs + GINTMSK);
-	}
-}
-
-/**
- * s3c_hsotg_disable_gsint - disable one or more of the general interrupt
- * @hsotg: The device state
- * @ints: A bitmask of the interrupts to enable
- */
-static void s3c_hsotg_disable_gsint(struct s3c_hsotg *hsotg, u32 ints)
-{
-	u32 gsintmsk = readl(hsotg->regs + GINTMSK);
-	u32 new_gsintmsk;
-
-	new_gsintmsk = gsintmsk & ~ints;
-
-	if (new_gsintmsk != gsintmsk)
-		writel(new_gsintmsk, hsotg->regs + GINTMSK);
-}
-
-/**
- * s3c_hsotg_ctrl_epint - enable/disable an endpoint irq
- * @hsotg: The device state
- * @ep: The endpoint index
- * @dir_in: True if direction is in.
- * @en: The enable value, true to enable
- *
- * Set or clear the mask for an individual endpoint's interrupt
- * request.
- */
-static void s3c_hsotg_ctrl_epint(struct s3c_hsotg *hsotg,
-				 unsigned int ep, unsigned int dir_in,
-				 unsigned int en)
-{
-	unsigned long flags;
-	u32 bit = 1 << ep;
-	u32 daint;
-
-	if (!dir_in)
-		bit <<= 16;
-
-	local_irq_save(flags);
-	daint = readl(hsotg->regs + DAINTMSK);
-	if (en)
-		daint |= bit;
-	else
-		daint &= ~bit;
-	writel(daint, hsotg->regs + DAINTMSK);
-	local_irq_restore(flags);
-}
-
-/**
- * s3c_hsotg_init_fifo - initialise non-periodic FIFOs
- * @hsotg: The device instance.
- */
-static void s3c_hsotg_init_fifo(struct s3c_hsotg *hsotg)
-{
-	unsigned int ep;
-	unsigned int addr;
-	unsigned int size;
-	int timeout;
-	u32 val;
-
-	/* set FIFO sizes to 2048/1024 */
-
-	writel(2048, hsotg->regs + GRXFSIZ);
-	writel(GNPTXFSIZ_NPTxFStAddr(2048) |
-	       GNPTXFSIZ_NPTxFDep(1024),
-	       hsotg->regs + GNPTXFSIZ);
-
-	/*
-	 * arange all the rest of the TX FIFOs, as some versions of this
-	 * block have overlapping default addresses. This also ensures
-	 * that if the settings have been changed, then they are set to
-	 * known values.
-	 */
-
-	/* start at the end of the GNPTXFSIZ, rounded up */
-	addr = 2048 + 1024;
-	size = 768;
-
-	/*
-	 * currently we allocate TX FIFOs for all possible endpoints,
-	 * and assume that they are all the same size.
-	 */
-
-	for (ep = 1; ep <= 15; ep++) {
-		val = addr;
-		val |= size << DPTXFSIZn_DPTxFSize_SHIFT;
-		addr += size;
-
-		writel(val, hsotg->regs + DPTXFSIZn(ep));
-	}
-
-	/*
-	 * according to p428 of the design guide, we need to ensure that
-	 * all fifos are flushed before continuing
-	 */
-
-	writel(GRSTCTL_TxFNum(0x10) | GRSTCTL_TxFFlsh |
-	       GRSTCTL_RxFFlsh, hsotg->regs + GRSTCTL);
-
-	/* wait until the fifos are both flushed */
-	timeout = 100;
-	while (1) {
-		val = readl(hsotg->regs + GRSTCTL);
-
-		if ((val & (GRSTCTL_TxFFlsh | GRSTCTL_RxFFlsh)) == 0)
-			break;
-
-		if (--timeout == 0) {
-			dev_err(hsotg->dev,
-				"%s: timeout flushing fifos (GRSTCTL=%08x)\n",
-				__func__, val);
-		}
-
-		udelay(1);
-	}
-
-	dev_dbg(hsotg->dev, "FIFOs reset, timeout at %d\n", timeout);
-}
-
-/**
- * @ep: USB endpoint to allocate request for.
- * @flags: Allocation flags
- *
- * Allocate a new USB request structure appropriate for the specified endpoint
- */
-static struct usb_request *s3c_hsotg_ep_alloc_request(struct usb_ep *ep,
-						      gfp_t flags)
-{
-	struct s3c_hsotg_req *req;
-
-	req = kzalloc(sizeof(struct s3c_hsotg_req), flags);
-	if (!req)
-		return NULL;
-
-	INIT_LIST_HEAD(&req->queue);
-
-	return &req->req;
-}
-
-/**
- * is_ep_periodic - return true if the endpoint is in periodic mode.
- * @hs_ep: The endpoint to query.
- *
- * Returns true if the endpoint is in periodic mode, meaning it is being
- * used for an Interrupt or ISO transfer.
- */
-static inline int is_ep_periodic(struct s3c_hsotg_ep *hs_ep)
-{
-	return hs_ep->periodic;
-}
-
-/**
- * s3c_hsotg_unmap_dma - unmap the DMA memory being used for the request
- * @hsotg: The device state.
- * @hs_ep: The endpoint for the request
- * @hs_req: The request being processed.
- *
- * This is the reverse of s3c_hsotg_map_dma(), called for the completion
- * of a request to ensure the buffer is ready for access by the caller.
- */
-static void s3c_hsotg_unmap_dma(struct s3c_hsotg *hsotg,
-				struct s3c_hsotg_ep *hs_ep,
-				struct s3c_hsotg_req *hs_req)
-{
-	struct usb_request *req = &hs_req->req;
-
-	/* ignore this if we're not moving any data */
-	if (hs_req->req.length == 0)
-		return;
-
-	usb_gadget_unmap_request(&hsotg->gadget, req, hs_ep->dir_in);
-}
-
-/**
- * s3c_hsotg_write_fifo - write packet Data to the TxFIFO
- * @hsotg: The controller state.
- * @hs_ep: The endpoint we're going to write for.
- * @hs_req: The request to write data for.
- *
- * This is called when the TxFIFO has some space in it to hold a new
- * transmission and we have something to give it. The actual setup of
- * the data size is done elsewhere, so all we have to do is to actually
- * write the data.
- *
- * The return value is zero if there is more space (or nothing was done)
- * otherwise -ENOSPC is returned if the FIFO space was used up.
- *
- * This routine is only needed for PIO
- */
-static int s3c_hsotg_write_fifo(struct s3c_hsotg *hsotg,
-				struct s3c_hsotg_ep *hs_ep,
-				struct s3c_hsotg_req *hs_req)
-{
-	bool periodic = is_ep_periodic(hs_ep);
-	u32 gnptxsts = readl(hsotg->regs + GNPTXSTS);
-	int buf_pos = hs_req->req.actual;
-	int to_write = hs_ep->size_loaded;
-	void *data;
-	int can_write;
-	int pkt_round;
-	int max_transfer;
-
-	to_write -= (buf_pos - hs_ep->last_load);
-
-	/* if there's nothing to write, get out early */
-	if (to_write == 0)
-		return 0;
-
-	if (periodic && !hsotg->dedicated_fifos) {
-		u32 epsize = readl(hsotg->regs + DIEPTSIZ(hs_ep->index));
-		int size_left;
-		int size_done;
-
-		/*
-		 * work out how much data was loaded so we can calculate
-		 * how much data is left in the fifo.
-		 */
-
-		size_left = DxEPTSIZ_XferSize_GET(epsize);
-
-		/*
-		 * if shared fifo, we cannot write anything until the
-		 * previous data has been completely sent.
-		 */
-		if (hs_ep->fifo_load != 0) {
-			s3c_hsotg_en_gsint(hsotg, GINTSTS_PTxFEmp);
-			return -ENOSPC;
-		}
-
-		dev_dbg(hsotg->dev, "%s: left=%d, load=%d, fifo=%d, size %d\n",
-			__func__, size_left,
-			hs_ep->size_loaded, hs_ep->fifo_load, hs_ep->fifo_size);
-
-		/* how much of the data has moved */
-		size_done = hs_ep->size_loaded - size_left;
-
-		/* how much data is left in the fifo */
-		can_write = hs_ep->fifo_load - size_done;
-		dev_dbg(hsotg->dev, "%s: => can_write1=%d\n",
-			__func__, can_write);
-
-		can_write = hs_ep->fifo_size - can_write;
-		dev_dbg(hsotg->dev, "%s: => can_write2=%d\n",
-			__func__, can_write);
-
-		if (can_write <= 0) {
-			s3c_hsotg_en_gsint(hsotg, GINTSTS_PTxFEmp);
-			return -ENOSPC;
-		}
-	} else if (hsotg->dedicated_fifos && hs_ep->index != 0) {
-		can_write = readl(hsotg->regs + DTXFSTS(hs_ep->index));
-
-		can_write &= 0xffff;
-		can_write *= 4;
-	} else {
-		if (GNPTXSTS_NPTxQSpcAvail_GET(gnptxsts) == 0) {
-			dev_dbg(hsotg->dev,
-				"%s: no queue slots available (0x%08x)\n",
-				__func__, gnptxsts);
-
-			s3c_hsotg_en_gsint(hsotg, GINTSTS_NPTxFEmp);
-			return -ENOSPC;
-		}
-
-		can_write = GNPTXSTS_NPTxFSpcAvail_GET(gnptxsts);
-		can_write *= 4;	/* fifo size is in 32bit quantities. */
-	}
-
-	max_transfer = hs_ep->ep.maxpacket * hs_ep->mc;
-
-	dev_dbg(hsotg->dev, "%s: GNPTXSTS=%08x, can=%d, to=%d, max_transfer %d\n",
-		 __func__, gnptxsts, can_write, to_write, max_transfer);
-
-	/*
-	 * limit to 512 bytes of data, it seems at least on the non-periodic
-	 * FIFO, requests of >512 cause the endpoint to get stuck with a
-	 * fragment of the end of the transfer in it.
-	 */
-	if (can_write > 512 && !periodic)
-		can_write = 512;
-
-	/*
-	 * limit the write to one max-packet size worth of data, but allow
-	 * the transfer to return that it did not run out of fifo space
-	 * doing it.
-	 */
-	if (to_write > max_transfer) {
-		to_write = max_transfer;
-
-		/* it's needed only when we do not use dedicated fifos */
-		if (!hsotg->dedicated_fifos)
-			s3c_hsotg_en_gsint(hsotg,
-					   periodic ? GINTSTS_PTxFEmp :
-					   GINTSTS_NPTxFEmp);
-	}
-
-	/* see if we can write data */
-
-	if (to_write > can_write) {
-		to_write = can_write;
-		pkt_round = to_write % max_transfer;
-
-		/*
-		 * Round the write down to an
-		 * exact number of packets.
-		 *
-		 * Note, we do not currently check to see if we can ever
-		 * write a full packet or not to the FIFO.
-		 */
-
-		if (pkt_round)
-			to_write -= pkt_round;
-
-		/*
-		 * enable correct FIFO interrupt to alert us when there
-		 * is more room left.
-		 */
-
-		/* it's needed only when we do not use dedicated fifos */
-		if (!hsotg->dedicated_fifos)
-			s3c_hsotg_en_gsint(hsotg,
-					   periodic ? GINTSTS_PTxFEmp :
-					   GINTSTS_NPTxFEmp);
-	}
-
-	dev_dbg(hsotg->dev, "write %d/%d, can_write %d, done %d\n",
-		 to_write, hs_req->req.length, can_write, buf_pos);
-
-	if (to_write <= 0)
-		return -ENOSPC;
-
-	hs_req->req.actual = buf_pos + to_write;
-	hs_ep->total_data += to_write;
-
-	if (periodic)
-		hs_ep->fifo_load += to_write;
-
-	to_write = DIV_ROUND_UP(to_write, 4);
-	data = hs_req->req.buf + buf_pos;
-
-	iowrite32_rep(hsotg->regs + EPFIFO(hs_ep->index), data, to_write);
-
-	return (to_write >= can_write) ? -ENOSPC : 0;
-}
-
-/**
- * get_ep_limit - get the maximum data legnth for this endpoint
- * @hs_ep: The endpoint
- *
- * Return the maximum data that can be queued in one go on a given endpoint
- * so that transfers that are too long can be split.
- */
-static unsigned get_ep_limit(struct s3c_hsotg_ep *hs_ep)
-{
-	int index = hs_ep->index;
-	unsigned maxsize;
-	unsigned maxpkt;
-
-	if (index != 0) {
-		maxsize = DxEPTSIZ_XferSize_LIMIT + 1;
-		maxpkt = DxEPTSIZ_PktCnt_LIMIT + 1;
-	} else {
-		maxsize = 64+64;
-		if (hs_ep->dir_in)
-			maxpkt = DIEPTSIZ0_PktCnt_LIMIT + 1;
-		else
-			maxpkt = 2;
-	}
-
-	/* we made the constant loading easier above by using +1 */
-	maxpkt--;
-	maxsize--;
-
-	/*
-	 * constrain by packet count if maxpkts*pktsize is greater
-	 * than the length register size.
-	 */
-
-	if ((maxpkt * hs_ep->ep.maxpacket) < maxsize)
-		maxsize = maxpkt * hs_ep->ep.maxpacket;
-
-	return maxsize;
-}
-
-/**
- * s3c_hsotg_start_req - start a USB request from an endpoint's queue
- * @hsotg: The controller state.
- * @hs_ep: The endpoint to process a request for
- * @hs_req: The request to start.
- * @continuing: True if we are doing more for the current request.
- *
- * Start the given request running by setting the endpoint registers
- * appropriately, and writing any data to the FIFOs.
- */
-static void s3c_hsotg_start_req(struct s3c_hsotg *hsotg,
-				struct s3c_hsotg_ep *hs_ep,
-				struct s3c_hsotg_req *hs_req,
-				bool continuing)
-{
-	struct usb_request *ureq = &hs_req->req;
-	int index = hs_ep->index;
-	int dir_in = hs_ep->dir_in;
-	u32 epctrl_reg;
-	u32 epsize_reg;
-	u32 epsize;
-	u32 ctrl;
-	unsigned length;
-	unsigned packets;
-	unsigned maxreq;
-
-	if (index != 0) {
-		if (hs_ep->req && !continuing) {
-			dev_err(hsotg->dev, "%s: active request\n", __func__);
-			WARN_ON(1);
-			return;
-		} else if (hs_ep->req != hs_req && continuing) {
-			dev_err(hsotg->dev,
-				"%s: continue different req\n", __func__);
-			WARN_ON(1);
-			return;
-		}
-	}
-
-	epctrl_reg = dir_in ? DIEPCTL(index) : DOEPCTL(index);
-	epsize_reg = dir_in ? DIEPTSIZ(index) : DOEPTSIZ(index);
-
-	dev_dbg(hsotg->dev, "%s: DxEPCTL=0x%08x, ep %d, dir %s\n",
-		__func__, readl(hsotg->regs + epctrl_reg), index,
-		hs_ep->dir_in ? "in" : "out");
-
-	/* If endpoint is stalled, we will restart request later */
-	ctrl = readl(hsotg->regs + epctrl_reg);
-
-	if (ctrl & DxEPCTL_Stall) {
-		dev_warn(hsotg->dev, "%s: ep%d is stalled\n", __func__, index);
-		return;
-	}
-
-	length = ureq->length - ureq->actual;
-	dev_dbg(hsotg->dev, "ureq->length:%d ureq->actual:%d\n",
-		ureq->length, ureq->actual);
-	if (0)
-		dev_dbg(hsotg->dev,
-			"REQ buf %p len %d dma 0x%pad noi=%d zp=%d snok=%d\n",
-			ureq->buf, length, &ureq->dma,
-			ureq->no_interrupt, ureq->zero, ureq->short_not_ok);
-
-	maxreq = get_ep_limit(hs_ep);
-	if (length > maxreq) {
-		int round = maxreq % hs_ep->ep.maxpacket;
-
-		dev_dbg(hsotg->dev, "%s: length %d, max-req %d, r %d\n",
-			__func__, length, maxreq, round);
-
-		/* round down to multiple of packets */
-		if (round)
-			maxreq -= round;
-
-		length = maxreq;
-	}
-
-	if (length)
-		packets = DIV_ROUND_UP(length, hs_ep->ep.maxpacket);
-	else
-		packets = 1;	/* send one packet if length is zero. */
-
-	if (hs_ep->isochronous && length > (hs_ep->mc * hs_ep->ep.maxpacket)) {
-		dev_err(hsotg->dev, "req length > maxpacket*mc\n");
-		return;
-	}
-
-	if (dir_in && index != 0)
-		if (hs_ep->isochronous)
-			epsize = DxEPTSIZ_MC(packets);
-		else
-			epsize = DxEPTSIZ_MC(1);
-	else
-		epsize = 0;
-
-	if (index != 0 && ureq->zero) {
-		/*
-		 * test for the packets being exactly right for the
-		 * transfer
-		 */
-
-		if (length == (packets * hs_ep->ep.maxpacket))
-			packets++;
-	}
-
-	epsize |= DxEPTSIZ_PktCnt(packets);
-	epsize |= DxEPTSIZ_XferSize(length);
-
-	dev_dbg(hsotg->dev, "%s: %d@%d/%d, 0x%08x => 0x%08x\n",
-		__func__, packets, length, ureq->length, epsize, epsize_reg);
-
-	/* store the request as the current one we're doing */
-	hs_ep->req = hs_req;
-
-	/* write size / packets */
-	writel(epsize, hsotg->regs + epsize_reg);
-
-	if (using_dma(hsotg) && !continuing) {
-		unsigned int dma_reg;
-
-		/*
-		 * write DMA address to control register, buffer already
-		 * synced by s3c_hsotg_ep_queue().
-		 */
-
-		dma_reg = dir_in ? DIEPDMA(index) : DOEPDMA(index);
-		writel(ureq->dma, hsotg->regs + dma_reg);
-
-		dev_dbg(hsotg->dev, "%s: 0x%pad => 0x%08x\n",
-			__func__, &ureq->dma, dma_reg);
-	}
-
-	ctrl |= DxEPCTL_EPEna;	/* ensure ep enabled */
-	ctrl |= DxEPCTL_USBActEp;
-
-	dev_dbg(hsotg->dev, "setup req:%d\n", hsotg->setup);
-
-	/* For Setup request do not clear NAK */
-	if (hsotg->setup && index == 0)
-		hsotg->setup = 0;
-	else
-		ctrl |= DxEPCTL_CNAK;	/* clear NAK set by core */
-
-
-	dev_dbg(hsotg->dev, "%s: DxEPCTL=0x%08x\n", __func__, ctrl);
-	writel(ctrl, hsotg->regs + epctrl_reg);
-
-	/*
-	 * set these, it seems that DMA support increments past the end
-	 * of the packet buffer so we need to calculate the length from
-	 * this information.
-	 */
-	hs_ep->size_loaded = length;
-	hs_ep->last_load = ureq->actual;
-
-	if (dir_in && !using_dma(hsotg)) {
-		/* set these anyway, we may need them for non-periodic in */
-		hs_ep->fifo_load = 0;
-
-		s3c_hsotg_write_fifo(hsotg, hs_ep, hs_req);
-	}
-
-	/*
-	 * clear the INTknTXFEmpMsk when we start request, more as a aide
-	 * to debugging to see what is going on.
-	 */
-	if (dir_in)
-		writel(DIEPMSK_INTknTXFEmpMsk,
-		       hsotg->regs + DIEPINT(index));
-
-	/*
-	 * Note, trying to clear the NAK here causes problems with transmit
-	 * on the S3C6400 ending up with the TXFIFO becoming full.
-	 */
-
-	/* check ep is enabled */
-	if (!(readl(hsotg->regs + epctrl_reg) & DxEPCTL_EPEna))
-		dev_warn(hsotg->dev,
-			 "ep%d: failed to become enabled (DxEPCTL=0x%08x)?\n",
-			 index, readl(hsotg->regs + epctrl_reg));
-
-	dev_dbg(hsotg->dev, "%s: DxEPCTL=0x%08x\n",
-		__func__, readl(hsotg->regs + epctrl_reg));
-
-	/* enable ep interrupts */
-	s3c_hsotg_ctrl_epint(hsotg, hs_ep->index, hs_ep->dir_in, 1);
-}
-
-/**
- * s3c_hsotg_map_dma - map the DMA memory being used for the request
- * @hsotg: The device state.
- * @hs_ep: The endpoint the request is on.
- * @req: The request being processed.
- *
- * We've been asked to queue a request, so ensure that the memory buffer
- * is correctly setup for DMA. If we've been passed an extant DMA address
- * then ensure the buffer has been synced to memory. If our buffer has no
- * DMA memory, then we map the memory and mark our request to allow us to
- * cleanup on completion.
- */
-static int s3c_hsotg_map_dma(struct s3c_hsotg *hsotg,
-			     struct s3c_hsotg_ep *hs_ep,
-			     struct usb_request *req)
-{
-	struct s3c_hsotg_req *hs_req = our_req(req);
-	int ret;
-
-	/* if the length is zero, ignore the DMA data */
-	if (hs_req->req.length == 0)
-		return 0;
-
-	ret = usb_gadget_map_request(&hsotg->gadget, req, hs_ep->dir_in);
-	if (ret)
-		goto dma_error;
-
-	return 0;
-
-dma_error:
-	dev_err(hsotg->dev, "%s: failed to map buffer %p, %d bytes\n",
-		__func__, req->buf, req->length);
-
-	return -EIO;
-}
-
-static int s3c_hsotg_ep_queue(struct usb_ep *ep, struct usb_request *req,
-			      gfp_t gfp_flags)
-{
-	struct s3c_hsotg_req *hs_req = our_req(req);
-	struct s3c_hsotg_ep *hs_ep = our_ep(ep);
-	struct s3c_hsotg *hs = hs_ep->parent;
-	bool first;
-
-	dev_dbg(hs->dev, "%s: req %p: %d@%p, noi=%d, zero=%d, snok=%d\n",
-		ep->name, req, req->length, req->buf, req->no_interrupt,
-		req->zero, req->short_not_ok);
-
-	/* initialise status of the request */
-	INIT_LIST_HEAD(&hs_req->queue);
-	req->actual = 0;
-	req->status = -EINPROGRESS;
-
-	/* if we're using DMA, sync the buffers as necessary */
-	if (using_dma(hs)) {
-		int ret = s3c_hsotg_map_dma(hs, hs_ep, req);
-		if (ret)
-			return ret;
-	}
-
-	first = list_empty(&hs_ep->queue);
-	list_add_tail(&hs_req->queue, &hs_ep->queue);
-
-	if (first)
-		s3c_hsotg_start_req(hs, hs_ep, hs_req, false);
-
-	return 0;
-}
-
-static int s3c_hsotg_ep_queue_lock(struct usb_ep *ep, struct usb_request *req,
-			      gfp_t gfp_flags)
-{
-	struct s3c_hsotg_ep *hs_ep = our_ep(ep);
-	struct s3c_hsotg *hs = hs_ep->parent;
-	unsigned long flags = 0;
-	int ret = 0;
-
-	spin_lock_irqsave(&hs->lock, flags);
-	ret = s3c_hsotg_ep_queue(ep, req, gfp_flags);
-	spin_unlock_irqrestore(&hs->lock, flags);
-
-	return ret;
-}
-
-static void s3c_hsotg_ep_free_request(struct usb_ep *ep,
-				      struct usb_request *req)
-{
-	struct s3c_hsotg_req *hs_req = our_req(req);
-
-	kfree(hs_req);
-}
-
-/**
- * s3c_hsotg_complete_oursetup - setup completion callback
- * @ep: The endpoint the request was on.
- * @req: The request completed.
- *
- * Called on completion of any requests the driver itself
- * submitted that need cleaning up.
- */
-static void s3c_hsotg_complete_oursetup(struct usb_ep *ep,
-					struct usb_request *req)
-{
-	struct s3c_hsotg_ep *hs_ep = our_ep(ep);
-	struct s3c_hsotg *hsotg = hs_ep->parent;
-
-	dev_dbg(hsotg->dev, "%s: ep %p, req %p\n", __func__, ep, req);
-
-	s3c_hsotg_ep_free_request(ep, req);
-}
-
-/**
- * ep_from_windex - convert control wIndex value to endpoint
- * @hsotg: The driver state.
- * @windex: The control request wIndex field (in host order).
- *
- * Convert the given wIndex into a pointer to an driver endpoint
- * structure, or return NULL if it is not a valid endpoint.
- */
-static struct s3c_hsotg_ep *ep_from_windex(struct s3c_hsotg *hsotg,
-					   u32 windex)
-{
-	struct s3c_hsotg_ep *ep = &hsotg->eps[windex & 0x7F];
-	int dir = (windex & USB_DIR_IN) ? 1 : 0;
-	int idx = windex & 0x7F;
-
-	if (windex >= 0x100)
-		return NULL;
-
-	if (idx > hsotg->num_of_eps)
-		return NULL;
-
-	if (idx && ep->dir_in != dir)
-		return NULL;
-
-	return ep;
-}
-
-/**
- * s3c_hsotg_send_reply - send reply to control request
- * @hsotg: The device state
- * @ep: Endpoint 0
- * @buff: Buffer for request
- * @length: Length of reply.
- *
- * Create a request and queue it on the given endpoint. This is useful as
- * an internal method of sending replies to certain control requests, etc.
- */
-static int s3c_hsotg_send_reply(struct s3c_hsotg *hsotg,
-				struct s3c_hsotg_ep *ep,
-				void *buff,
-				int length)
-{
-	struct usb_request *req;
-	int ret;
-
-	dev_dbg(hsotg->dev, "%s: buff %p, len %d\n", __func__, buff, length);
-
-	req = s3c_hsotg_ep_alloc_request(&ep->ep, GFP_ATOMIC);
-	hsotg->ep0_reply = req;
-	if (!req) {
-		dev_warn(hsotg->dev, "%s: cannot alloc req\n", __func__);
-		return -ENOMEM;
-	}
-
-	req->buf = hsotg->ep0_buff;
-	req->length = length;
-	req->zero = 1; /* always do zero-length final transfer */
-	req->complete = s3c_hsotg_complete_oursetup;
-
-	if (length)
-		memcpy(req->buf, buff, length);
-	else
-		ep->sent_zlp = 1;
-
-	ret = s3c_hsotg_ep_queue(&ep->ep, req, GFP_ATOMIC);
-	if (ret) {
-		dev_warn(hsotg->dev, "%s: cannot queue req\n", __func__);
-		return ret;
-	}
-
-	return 0;
-}
-
-/**
- * s3c_hsotg_process_req_status - process request GET_STATUS
- * @hsotg: The device state
- * @ctrl: USB control request
- */
-static int s3c_hsotg_process_req_status(struct s3c_hsotg *hsotg,
-					struct usb_ctrlrequest *ctrl)
-{
-	struct s3c_hsotg_ep *ep0 = &hsotg->eps[0];
-	struct s3c_hsotg_ep *ep;
-	__le16 reply;
-	int ret;
-
-	dev_dbg(hsotg->dev, "%s: USB_REQ_GET_STATUS\n", __func__);
-
-	if (!ep0->dir_in) {
-		dev_warn(hsotg->dev, "%s: direction out?\n", __func__);
-		return -EINVAL;
-	}
-
-	switch (ctrl->bRequestType & USB_RECIP_MASK) {
-	case USB_RECIP_DEVICE:
-		reply = cpu_to_le16(0); /* bit 0 => self powered,
-					 * bit 1 => remote wakeup */
-		break;
-
-	case USB_RECIP_INTERFACE:
-		/* currently, the data result should be zero */
-		reply = cpu_to_le16(0);
-		break;
-
-	case USB_RECIP_ENDPOINT:
-		ep = ep_from_windex(hsotg, le16_to_cpu(ctrl->wIndex));
-		if (!ep)
-			return -ENOENT;
-
-		reply = cpu_to_le16(ep->halted ? 1 : 0);
-		break;
-
-	default:
-		return 0;
-	}
-
-	if (le16_to_cpu(ctrl->wLength) != 2)
-		return -EINVAL;
-
-	ret = s3c_hsotg_send_reply(hsotg, ep0, &reply, 2);
-	if (ret) {
-		dev_err(hsotg->dev, "%s: failed to send reply\n", __func__);
-		return ret;
-	}
-
-	return 1;
-}
-
-static int s3c_hsotg_ep_sethalt(struct usb_ep *ep, int value);
-
-/**
- * get_ep_head - return the first request on the endpoint
- * @hs_ep: The controller endpoint to get
- *
- * Get the first request on the endpoint.
- */
-static struct s3c_hsotg_req *get_ep_head(struct s3c_hsotg_ep *hs_ep)
-{
-	if (list_empty(&hs_ep->queue))
-		return NULL;
-
-	return list_first_entry(&hs_ep->queue, struct s3c_hsotg_req, queue);
-}
-
-/**
- * s3c_hsotg_process_req_featire - process request {SET,CLEAR}_FEATURE
- * @hsotg: The device state
- * @ctrl: USB control request
- */
-static int s3c_hsotg_process_req_feature(struct s3c_hsotg *hsotg,
-					 struct usb_ctrlrequest *ctrl)
-{
-	struct s3c_hsotg_ep *ep0 = &hsotg->eps[0];
-	struct s3c_hsotg_req *hs_req;
-	bool restart;
-	bool set = (ctrl->bRequest == USB_REQ_SET_FEATURE);
-	struct s3c_hsotg_ep *ep;
-	int ret;
-	bool halted;
-
-	dev_dbg(hsotg->dev, "%s: %s_FEATURE\n",
-		__func__, set ? "SET" : "CLEAR");
-
-	if (ctrl->bRequestType == USB_RECIP_ENDPOINT) {
-		ep = ep_from_windex(hsotg, le16_to_cpu(ctrl->wIndex));
-		if (!ep) {
-			dev_dbg(hsotg->dev, "%s: no endpoint for 0x%04x\n",
-				__func__, le16_to_cpu(ctrl->wIndex));
-			return -ENOENT;
-		}
-
-		switch (le16_to_cpu(ctrl->wValue)) {
-		case USB_ENDPOINT_HALT:
-			halted = ep->halted;
-
-			s3c_hsotg_ep_sethalt(&ep->ep, set);
-
-			ret = s3c_hsotg_send_reply(hsotg, ep0, NULL, 0);
-			if (ret) {
-				dev_err(hsotg->dev,
-					"%s: failed to send reply\n", __func__);
-				return ret;
-			}
-
-			/*
-			 * we have to complete all requests for ep if it was
-			 * halted, and the halt was cleared by CLEAR_FEATURE
-			 */
-
-			if (!set && halted) {
-				/*
-				 * If we have request in progress,
-				 * then complete it
-				 */
-				if (ep->req) {
-					hs_req = ep->req;
-					ep->req = NULL;
-					list_del_init(&hs_req->queue);
-					hs_req->req.complete(&ep->ep,
-							     &hs_req->req);
-				}
-
-				/* If we have pending request, then start it */
-				restart = !list_empty(&ep->queue);
-				if (restart) {
-					hs_req = get_ep_head(ep);
-					s3c_hsotg_start_req(hsotg, ep,
-							    hs_req, false);
-				}
-			}
-
-			break;
-
-		default:
-			return -ENOENT;
-		}
-	} else
-		return -ENOENT;  /* currently only deal with endpoint */
-
-	return 1;
-}
-
-static void s3c_hsotg_enqueue_setup(struct s3c_hsotg *hsotg);
-static void s3c_hsotg_disconnect(struct s3c_hsotg *hsotg);
-
-/**
- * s3c_hsotg_stall_ep0 - stall ep0
- * @hsotg: The device state
- *
- * Set stall for ep0 as response for setup request.
- */
-static void s3c_hsotg_stall_ep0(struct s3c_hsotg *hsotg) {
-	struct s3c_hsotg_ep *ep0 = &hsotg->eps[0];
-	u32 reg;
-	u32 ctrl;
-
-	dev_dbg(hsotg->dev, "ep0 stall (dir=%d)\n", ep0->dir_in);
-	reg = (ep0->dir_in) ? DIEPCTL0 : DOEPCTL0;
-
-	/*
-	 * DxEPCTL_Stall will be cleared by EP once it has
-	 * taken effect, so no need to clear later.
-	 */
-
-	ctrl = readl(hsotg->regs + reg);
-	ctrl |= DxEPCTL_Stall;
-	ctrl |= DxEPCTL_CNAK;
-	writel(ctrl, hsotg->regs + reg);
-
-	dev_dbg(hsotg->dev,
-		"written DxEPCTL=0x%08x to %08x (DxEPCTL=0x%08x)\n",
-		ctrl, reg, readl(hsotg->regs + reg));
-
-	 /*
-	  * complete won't be called, so we enqueue
-	  * setup request here
-	  */
-	 s3c_hsotg_enqueue_setup(hsotg);
-}
-
-/**
- * s3c_hsotg_process_control - process a control request
- * @hsotg: The device state
- * @ctrl: The control request received
- *
- * The controller has received the SETUP phase of a control request, and
- * needs to work out what to do next (and whether to pass it on to the
- * gadget driver).
- */
-static void s3c_hsotg_process_control(struct s3c_hsotg *hsotg,
-				      struct usb_ctrlrequest *ctrl)
-{
-	struct s3c_hsotg_ep *ep0 = &hsotg->eps[0];
-	int ret = 0;
-	u32 dcfg;
-
-	ep0->sent_zlp = 0;
-
-	dev_dbg(hsotg->dev, "ctrl Req=%02x, Type=%02x, V=%04x, L=%04x\n",
-		 ctrl->bRequest, ctrl->bRequestType,
-		 ctrl->wValue, ctrl->wLength);
-
-	/*
-	 * record the direction of the request, for later use when enquing
-	 * packets onto EP0.
-	 */
-
-	ep0->dir_in = (ctrl->bRequestType & USB_DIR_IN) ? 1 : 0;
-	dev_dbg(hsotg->dev, "ctrl: dir_in=%d\n", ep0->dir_in);
-
-	/*
-	 * if we've no data with this request, then the last part of the
-	 * transaction is going to implicitly be IN.
-	 */
-	if (ctrl->wLength == 0)
-		ep0->dir_in = 1;
-
-	if ((ctrl->bRequestType & USB_TYPE_MASK) == USB_TYPE_STANDARD) {
-		switch (ctrl->bRequest) {
-		case USB_REQ_SET_ADDRESS:
-			s3c_hsotg_disconnect(hsotg);
-			dcfg = readl(hsotg->regs + DCFG);
-			dcfg &= ~DCFG_DevAddr_MASK;
-			dcfg |= ctrl->wValue << DCFG_DevAddr_SHIFT;
-			writel(dcfg, hsotg->regs + DCFG);
-
-			dev_info(hsotg->dev, "new address %d\n", ctrl->wValue);
-
-			ret = s3c_hsotg_send_reply(hsotg, ep0, NULL, 0);
-			return;
-
-		case USB_REQ_GET_STATUS:
-			ret = s3c_hsotg_process_req_status(hsotg, ctrl);
-			break;
-
-		case USB_REQ_CLEAR_FEATURE:
-		case USB_REQ_SET_FEATURE:
-			ret = s3c_hsotg_process_req_feature(hsotg, ctrl);
-			break;
-		}
-	}
-
-	/* as a fallback, try delivering it to the driver to deal with */
-
-	if (ret == 0 && hsotg->driver) {
-		spin_unlock(&hsotg->lock);
-		ret = hsotg->driver->setup(&hsotg->gadget, ctrl);
-		spin_lock(&hsotg->lock);
-		if (ret < 0)
-			dev_dbg(hsotg->dev, "driver->setup() ret %d\n", ret);
-	}
-
-	/*
-	 * the request is either unhandlable, or is not formatted correctly
-	 * so respond with a STALL for the status stage to indicate failure.
-	 */
-
-	if (ret < 0)
-		s3c_hsotg_stall_ep0(hsotg);
-}
-
-/**
- * s3c_hsotg_complete_setup - completion of a setup transfer
- * @ep: The endpoint the request was on.
- * @req: The request completed.
- *
- * Called on completion of any requests the driver itself submitted for
- * EP0 setup packets
- */
-static void s3c_hsotg_complete_setup(struct usb_ep *ep,
-				     struct usb_request *req)
-{
-	struct s3c_hsotg_ep *hs_ep = our_ep(ep);
-	struct s3c_hsotg *hsotg = hs_ep->parent;
-
-	if (req->status < 0) {
-		dev_dbg(hsotg->dev, "%s: failed %d\n", __func__, req->status);
-		return;
-	}
-
-	spin_lock(&hsotg->lock);
-	if (req->actual == 0)
-		s3c_hsotg_enqueue_setup(hsotg);
-	else
-		s3c_hsotg_process_control(hsotg, req->buf);
-	spin_unlock(&hsotg->lock);
-}
-
-/**
- * s3c_hsotg_enqueue_setup - start a request for EP0 packets
- * @hsotg: The device state.
- *
- * Enqueue a request on EP0 if necessary to received any SETUP packets
- * received from the host.
- */
-static void s3c_hsotg_enqueue_setup(struct s3c_hsotg *hsotg)
-{
-	struct usb_request *req = hsotg->ctrl_req;
-	struct s3c_hsotg_req *hs_req = our_req(req);
-	int ret;
-
-	dev_dbg(hsotg->dev, "%s: queueing setup request\n", __func__);
-
-	req->zero = 0;
-	req->length = 8;
-	req->buf = hsotg->ctrl_buff;
-	req->complete = s3c_hsotg_complete_setup;
-
-	if (!list_empty(&hs_req->queue)) {
-		dev_dbg(hsotg->dev, "%s already queued???\n", __func__);
-		return;
-	}
-
-	hsotg->eps[0].dir_in = 0;
-
-	ret = s3c_hsotg_ep_queue(&hsotg->eps[0].ep, req, GFP_ATOMIC);
-	if (ret < 0) {
-		dev_err(hsotg->dev, "%s: failed queue (%d)\n", __func__, ret);
-		/*
-		 * Don't think there's much we can do other than watch the
-		 * driver fail.
-		 */
-	}
-}
-
-/**
- * s3c_hsotg_complete_request - complete a request given to us
- * @hsotg: The device state.
- * @hs_ep: The endpoint the request was on.
- * @hs_req: The request to complete.
- * @result: The result code (0 => Ok, otherwise errno)
- *
- * The given request has finished, so call the necessary completion
- * if it has one and then look to see if we can start a new request
- * on the endpoint.
- *
- * Note, expects the ep to already be locked as appropriate.
- */
-static void s3c_hsotg_complete_request(struct s3c_hsotg *hsotg,
-				       struct s3c_hsotg_ep *hs_ep,
-				       struct s3c_hsotg_req *hs_req,
-				       int result)
-{
-	bool restart;
-
-	if (!hs_req) {
-		dev_dbg(hsotg->dev, "%s: nothing to complete?\n", __func__);
-		return;
-	}
-
-	dev_dbg(hsotg->dev, "complete: ep %p %s, req %p, %d => %p\n",
-		hs_ep, hs_ep->ep.name, hs_req, result, hs_req->req.complete);
-
-	/*
-	 * only replace the status if we've not already set an error
-	 * from a previous transaction
-	 */
-
-	if (hs_req->req.status == -EINPROGRESS)
-		hs_req->req.status = result;
-
-	hs_ep->req = NULL;
-	list_del_init(&hs_req->queue);
-
-	if (using_dma(hsotg))
-		s3c_hsotg_unmap_dma(hsotg, hs_ep, hs_req);
-
-	/*
-	 * call the complete request with the locks off, just in case the
-	 * request tries to queue more work for this endpoint.
-	 */
-
-	if (hs_req->req.complete) {
-		spin_unlock(&hsotg->lock);
-		hs_req->req.complete(&hs_ep->ep, &hs_req->req);
-		spin_lock(&hsotg->lock);
-	}
-
-	/*
-	 * Look to see if there is anything else to do. Note, the completion
-	 * of the previous request may have caused a new request to be started
-	 * so be careful when doing this.
-	 */
-
-	if (!hs_ep->req && result >= 0) {
-		restart = !list_empty(&hs_ep->queue);
-		if (restart) {
-			hs_req = get_ep_head(hs_ep);
-			s3c_hsotg_start_req(hsotg, hs_ep, hs_req, false);
-		}
-	}
-}
-
-/**
- * s3c_hsotg_rx_data - receive data from the FIFO for an endpoint
- * @hsotg: The device state.
- * @ep_idx: The endpoint index for the data
- * @size: The size of data in the fifo, in bytes
- *
- * The FIFO status shows there is data to read from the FIFO for a given
- * endpoint, so sort out whether we need to read the data into a request
- * that has been made for that endpoint.
- */
-static void s3c_hsotg_rx_data(struct s3c_hsotg *hsotg, int ep_idx, int size)
-{
-	struct s3c_hsotg_ep *hs_ep = &hsotg->eps[ep_idx];
-	struct s3c_hsotg_req *hs_req = hs_ep->req;
-	void __iomem *fifo = hsotg->regs + EPFIFO(ep_idx);
-	int to_read;
-	int max_req;
-	int read_ptr;
-
-
-	if (!hs_req) {
-		u32 epctl = readl(hsotg->regs + DOEPCTL(ep_idx));
-		int ptr;
-
-		dev_warn(hsotg->dev,
-			 "%s: FIFO %d bytes on ep%d but no req (DxEPCTl=0x%08x)\n",
-			 __func__, size, ep_idx, epctl);
-
-		/* dump the data from the FIFO, we've nothing we can do */
-		for (ptr = 0; ptr < size; ptr += 4)
-			(void)readl(fifo);
-
-		return;
-	}
-
-	to_read = size;
-	read_ptr = hs_req->req.actual;
-	max_req = hs_req->req.length - read_ptr;
-
-	dev_dbg(hsotg->dev, "%s: read %d/%d, done %d/%d\n",
-		__func__, to_read, max_req, read_ptr, hs_req->req.length);
-
-	if (to_read > max_req) {
-		/*
-		 * more data appeared than we where willing
-		 * to deal with in this request.
-		 */
-
-		/* currently we don't deal this */
-		WARN_ON_ONCE(1);
-	}
-
-	hs_ep->total_data += to_read;
-	hs_req->req.actual += to_read;
-	to_read = DIV_ROUND_UP(to_read, 4);
-
-	/*
-	 * note, we might over-write the buffer end by 3 bytes depending on
-	 * alignment of the data.
-	 */
-	ioread32_rep(fifo, hs_req->req.buf + read_ptr, to_read);
-}
-
-/**
- * s3c_hsotg_send_zlp - send zero-length packet on control endpoint
- * @hsotg: The device instance
- * @req: The request currently on this endpoint
- *
- * Generate a zero-length IN packet request for terminating a SETUP
- * transaction.
- *
- * Note, since we don't write any data to the TxFIFO, then it is
- * currently believed that we do not need to wait for any space in
- * the TxFIFO.
- */
-static void s3c_hsotg_send_zlp(struct s3c_hsotg *hsotg,
-			       struct s3c_hsotg_req *req)
-{
-	u32 ctrl;
-
-	if (!req) {
-		dev_warn(hsotg->dev, "%s: no request?\n", __func__);
-		return;
-	}
-
-	if (req->req.length == 0) {
-		hsotg->eps[0].sent_zlp = 1;
-		s3c_hsotg_enqueue_setup(hsotg);
-		return;
-	}
-
-	hsotg->eps[0].dir_in = 1;
-	hsotg->eps[0].sent_zlp = 1;
-
-	dev_dbg(hsotg->dev, "sending zero-length packet\n");
-
-	/* issue a zero-sized packet to terminate this */
-	writel(DxEPTSIZ_MC(1) | DxEPTSIZ_PktCnt(1) |
-	       DxEPTSIZ_XferSize(0), hsotg->regs + DIEPTSIZ(0));
-
-	ctrl = readl(hsotg->regs + DIEPCTL0);
-	ctrl |= DxEPCTL_CNAK;  /* clear NAK set by core */
-	ctrl |= DxEPCTL_EPEna; /* ensure ep enabled */
-	ctrl |= DxEPCTL_USBActEp;
-	writel(ctrl, hsotg->regs + DIEPCTL0);
-}
-
-/**
- * s3c_hsotg_handle_outdone - handle receiving OutDone/SetupDone from RXFIFO
- * @hsotg: The device instance
- * @epnum: The endpoint received from
- * @was_setup: Set if processing a SetupDone event.
- *
- * The RXFIFO has delivered an OutDone event, which means that the data
- * transfer for an OUT endpoint has been completed, either by a short
- * packet or by the finish of a transfer.
- */
-static void s3c_hsotg_handle_outdone(struct s3c_hsotg *hsotg,
-				     int epnum, bool was_setup)
-{
-	u32 epsize = readl(hsotg->regs + DOEPTSIZ(epnum));
-	struct s3c_hsotg_ep *hs_ep = &hsotg->eps[epnum];
-	struct s3c_hsotg_req *hs_req = hs_ep->req;
-	struct usb_request *req = &hs_req->req;
-	unsigned size_left = DxEPTSIZ_XferSize_GET(epsize);
-	int result = 0;
-
-	if (!hs_req) {
-		dev_dbg(hsotg->dev, "%s: no request active\n", __func__);
-		return;
-	}
-
-	if (using_dma(hsotg)) {
-		unsigned size_done;
-
-		/*
-		 * Calculate the size of the transfer by checking how much
-		 * is left in the endpoint size register and then working it
-		 * out from the amount we loaded for the transfer.
-		 *
-		 * We need to do this as DMA pointers are always 32bit aligned
-		 * so may overshoot/undershoot the transfer.
-		 */
-
-		size_done = hs_ep->size_loaded - size_left;
-		size_done += hs_ep->last_load;
-
-		req->actual = size_done;
-	}
-
-	/* if there is more request to do, schedule new transfer */
-	if (req->actual < req->length && size_left == 0) {
-		s3c_hsotg_start_req(hsotg, hs_ep, hs_req, true);
-		return;
-	} else if (epnum == 0) {
-		/*
-		 * After was_setup = 1 =>
-		 * set CNAK for non Setup requests
-		 */
-		hsotg->setup = was_setup ? 0 : 1;
-	}
-
-	if (req->actual < req->length && req->short_not_ok) {
-		dev_dbg(hsotg->dev, "%s: got %d/%d (short not ok) => error\n",
-			__func__, req->actual, req->length);
-
-		/*
-		 * todo - what should we return here? there's no one else
-		 * even bothering to check the status.
-		 */
-	}
-
-	if (epnum == 0) {
-		/*
-		 * Condition req->complete != s3c_hsotg_complete_setup says:
-		 * send ZLP when we have an asynchronous request from gadget
-		 */
-		if (!was_setup && req->complete != s3c_hsotg_complete_setup)
-			s3c_hsotg_send_zlp(hsotg, hs_req);
-	}
-
-	s3c_hsotg_complete_request(hsotg, hs_ep, hs_req, result);
-}
-
-/**
- * s3c_hsotg_read_frameno - read current frame number
- * @hsotg: The device instance
- *
- * Return the current frame number
- */
-static u32 s3c_hsotg_read_frameno(struct s3c_hsotg *hsotg)
-{
-	u32 dsts;
-
-	dsts = readl(hsotg->regs + DSTS);
-	dsts &= DSTS_SOFFN_MASK;
-	dsts >>= DSTS_SOFFN_SHIFT;
-
-	return dsts;
-}
-
-/**
- * s3c_hsotg_handle_rx - RX FIFO has data
- * @hsotg: The device instance
- *
- * The IRQ handler has detected that the RX FIFO has some data in it
- * that requires processing, so find out what is in there and do the
- * appropriate read.
- *
- * The RXFIFO is a true FIFO, the packets coming out are still in packet
- * chunks, so if you have x packets received on an endpoint you'll get x
- * FIFO events delivered, each with a packet's worth of data in it.
- *
- * When using DMA, we should not be processing events from the RXFIFO
- * as the actual data should be sent to the memory directly and we turn
- * on the completion interrupts to get notifications of transfer completion.
- */
-static void s3c_hsotg_handle_rx(struct s3c_hsotg *hsotg)
-{
-	u32 grxstsr = readl(hsotg->regs + GRXSTSP);
-	u32 epnum, status, size;
-
-	WARN_ON(using_dma(hsotg));
-
-	epnum = grxstsr & GRXSTS_EPNum_MASK;
-	status = grxstsr & GRXSTS_PktSts_MASK;
-
-	size = grxstsr & GRXSTS_ByteCnt_MASK;
-	size >>= GRXSTS_ByteCnt_SHIFT;
-
-	if (1)
-		dev_dbg(hsotg->dev, "%s: GRXSTSP=0x%08x (%d@%d)\n",
-			__func__, grxstsr, size, epnum);
-
-#define __status(x) ((x) >> GRXSTS_PktSts_SHIFT)
-
-	switch (status >> GRXSTS_PktSts_SHIFT) {
-	case __status(GRXSTS_PktSts_GlobalOutNAK):
-		dev_dbg(hsotg->dev, "GlobalOutNAK\n");
-		break;
-
-	case __status(GRXSTS_PktSts_OutDone):
-		dev_dbg(hsotg->dev, "OutDone (Frame=0x%08x)\n",
-			s3c_hsotg_read_frameno(hsotg));
-
-		if (!using_dma(hsotg))
-			s3c_hsotg_handle_outdone(hsotg, epnum, false);
-		break;
-
-	case __status(GRXSTS_PktSts_SetupDone):
-		dev_dbg(hsotg->dev,
-			"SetupDone (Frame=0x%08x, DOPEPCTL=0x%08x)\n",
-			s3c_hsotg_read_frameno(hsotg),
-			readl(hsotg->regs + DOEPCTL(0)));
-
-		s3c_hsotg_handle_outdone(hsotg, epnum, true);
-		break;
-
-	case __status(GRXSTS_PktSts_OutRX):
-		s3c_hsotg_rx_data(hsotg, epnum, size);
-		break;
-
-	case __status(GRXSTS_PktSts_SetupRX):
-		dev_dbg(hsotg->dev,
-			"SetupRX (Frame=0x%08x, DOPEPCTL=0x%08x)\n",
-			s3c_hsotg_read_frameno(hsotg),
-			readl(hsotg->regs + DOEPCTL(0)));
-
-		s3c_hsotg_rx_data(hsotg, epnum, size);
-		break;
-
-	default:
-		dev_warn(hsotg->dev, "%s: unknown status %08x\n",
-			 __func__, grxstsr);
-
-		s3c_hsotg_dump(hsotg);
-		break;
-	}
-}
-
-/**
- * s3c_hsotg_ep0_mps - turn max packet size into register setting
- * @mps: The maximum packet size in bytes.
- */
-static u32 s3c_hsotg_ep0_mps(unsigned int mps)
-{
-	switch (mps) {
-	case 64:
-		return D0EPCTL_MPS_64;
-	case 32:
-		return D0EPCTL_MPS_32;
-	case 16:
-		return D0EPCTL_MPS_16;
-	case 8:
-		return D0EPCTL_MPS_8;
-	}
-
-	/* bad max packet size, warn and return invalid result */
-	WARN_ON(1);
-	return (u32)-1;
-}
-
-/**
- * s3c_hsotg_set_ep_maxpacket - set endpoint's max-packet field
- * @hsotg: The driver state.
- * @ep: The index number of the endpoint
- * @mps: The maximum packet size in bytes
- *
- * Configure the maximum packet size for the given endpoint, updating
- * the hardware control registers to reflect this.
- */
-static void s3c_hsotg_set_ep_maxpacket(struct s3c_hsotg *hsotg,
-				       unsigned int ep, unsigned int mps)
-{
-	struct s3c_hsotg_ep *hs_ep = &hsotg->eps[ep];
-	void __iomem *regs = hsotg->regs;
-	u32 mpsval;
-	u32 mcval;
-	u32 reg;
-
-	if (ep == 0) {
-		/* EP0 is a special case */
-		mpsval = s3c_hsotg_ep0_mps(mps);
-		if (mpsval > 3)
-			goto bad_mps;
-		hs_ep->ep.maxpacket = mps;
-		hs_ep->mc = 1;
-	} else {
-		mpsval = mps & DxEPCTL_MPS_MASK;
-		if (mpsval > 1024)
-			goto bad_mps;
-		mcval = ((mps >> 11) & 0x3) + 1;
-		hs_ep->mc = mcval;
-		if (mcval > 3)
-			goto bad_mps;
-		hs_ep->ep.maxpacket = mpsval;
-	}
-
-	/*
-	 * update both the in and out endpoint controldir_ registers, even
-	 * if one of the directions may not be in use.
-	 */
-
-	reg = readl(regs + DIEPCTL(ep));
-	reg &= ~DxEPCTL_MPS_MASK;
-	reg |= mpsval;
-	writel(reg, regs + DIEPCTL(ep));
-
-	if (ep) {
-		reg = readl(regs + DOEPCTL(ep));
-		reg &= ~DxEPCTL_MPS_MASK;
-		reg |= mpsval;
-		writel(reg, regs + DOEPCTL(ep));
-	}
-
-	return;
-
-bad_mps:
-	dev_err(hsotg->dev, "ep%d: bad mps of %d\n", ep, mps);
-}
-
-/**
- * s3c_hsotg_txfifo_flush - flush Tx FIFO
- * @hsotg: The driver state
- * @idx: The index for the endpoint (0..15)
- */
-static void s3c_hsotg_txfifo_flush(struct s3c_hsotg *hsotg, unsigned int idx)
-{
-	int timeout;
-	int val;
-
-	writel(GRSTCTL_TxFNum(idx) | GRSTCTL_TxFFlsh,
-		hsotg->regs + GRSTCTL);
-
-	/* wait until the fifo is flushed */
-	timeout = 100;
-
-	while (1) {
-		val = readl(hsotg->regs + GRSTCTL);
-
-		if ((val & (GRSTCTL_TxFFlsh)) == 0)
-			break;
-
-		if (--timeout == 0) {
-			dev_err(hsotg->dev,
-				"%s: timeout flushing fifo (GRSTCTL=%08x)\n",
-				__func__, val);
-		}
-
-		udelay(1);
-	}
-}
-
-/**
- * s3c_hsotg_trytx - check to see if anything needs transmitting
- * @hsotg: The driver state
- * @hs_ep: The driver endpoint to check.
- *
- * Check to see if there is a request that has data to send, and if so
- * make an attempt to write data into the FIFO.
- */
-static int s3c_hsotg_trytx(struct s3c_hsotg *hsotg,
-			   struct s3c_hsotg_ep *hs_ep)
-{
-	struct s3c_hsotg_req *hs_req = hs_ep->req;
-
-	if (!hs_ep->dir_in || !hs_req) {
-		/**
-		 * if request is not enqueued, we disable interrupts
-		 * for endpoints, excepting ep0
-		 */
-		if (hs_ep->index != 0)
-			s3c_hsotg_ctrl_epint(hsotg, hs_ep->index,
-					     hs_ep->dir_in, 0);
-		return 0;
-	}
-
-	if (hs_req->req.actual < hs_req->req.length) {
-		dev_dbg(hsotg->dev, "trying to write more for ep%d\n",
-			hs_ep->index);
-		return s3c_hsotg_write_fifo(hsotg, hs_ep, hs_req);
-	}
-
-	return 0;
-}
-
-/**
- * s3c_hsotg_complete_in - complete IN transfer
- * @hsotg: The device state.
- * @hs_ep: The endpoint that has just completed.
- *
- * An IN transfer has been completed, update the transfer's state and then
- * call the relevant completion routines.
- */
-static void s3c_hsotg_complete_in(struct s3c_hsotg *hsotg,
-				  struct s3c_hsotg_ep *hs_ep)
-{
-	struct s3c_hsotg_req *hs_req = hs_ep->req;
-	u32 epsize = readl(hsotg->regs + DIEPTSIZ(hs_ep->index));
-	int size_left, size_done;
-
-	if (!hs_req) {
-		dev_dbg(hsotg->dev, "XferCompl but no req\n");
-		return;
-	}
-
-	/* Finish ZLP handling for IN EP0 transactions */
-	if (hsotg->eps[0].sent_zlp) {
-		dev_dbg(hsotg->dev, "zlp packet received\n");
-		s3c_hsotg_complete_request(hsotg, hs_ep, hs_req, 0);
-		return;
-	}
-
-	/*
-	 * Calculate the size of the transfer by checking how much is left
-	 * in the endpoint size register and then working it out from
-	 * the amount we loaded for the transfer.
-	 *
-	 * We do this even for DMA, as the transfer may have incremented
-	 * past the end of the buffer (DMA transfers are always 32bit
-	 * aligned).
-	 */
-
-	size_left = DxEPTSIZ_XferSize_GET(epsize);
-
-	size_done = hs_ep->size_loaded - size_left;
-	size_done += hs_ep->last_load;
-
-	if (hs_req->req.actual != size_done)
-		dev_dbg(hsotg->dev, "%s: adjusting size done %d => %d\n",
-			__func__, hs_req->req.actual, size_done);
-
-	hs_req->req.actual = size_done;
-	dev_dbg(hsotg->dev, "req->length:%d req->actual:%d req->zero:%d\n",
-		hs_req->req.length, hs_req->req.actual, hs_req->req.zero);
-
-	/*
-	 * Check if dealing with Maximum Packet Size(MPS) IN transfer at EP0
-	 * When sent data is a multiple MPS size (e.g. 64B ,128B ,192B
-	 * ,256B ... ), after last MPS sized packet send IN ZLP packet to
-	 * inform the host that no more data is available.
-	 * The state of req.zero member is checked to be sure that the value to
-	 * send is smaller than wValue expected from host.
-	 * Check req.length to NOT send another ZLP when the current one is
-	 * under completion (the one for which this completion has been called).
-	 */
-	if (hs_req->req.length && hs_ep->index == 0 && hs_req->req.zero &&
-	    hs_req->req.length == hs_req->req.actual &&
-	    !(hs_req->req.length % hs_ep->ep.maxpacket)) {
-
-		dev_dbg(hsotg->dev, "ep0 zlp IN packet sent\n");
-		s3c_hsotg_send_zlp(hsotg, hs_req);
-
-		return;
-	}
-
-	if (!size_left && hs_req->req.actual < hs_req->req.length) {
-		dev_dbg(hsotg->dev, "%s trying more for req...\n", __func__);
-		s3c_hsotg_start_req(hsotg, hs_ep, hs_req, true);
-	} else
-		s3c_hsotg_complete_request(hsotg, hs_ep, hs_req, 0);
-}
-
-/**
- * s3c_hsotg_epint - handle an in/out endpoint interrupt
- * @hsotg: The driver state
- * @idx: The index for the endpoint (0..15)
- * @dir_in: Set if this is an IN endpoint
- *
- * Process and clear any interrupt pending for an individual endpoint
- */
-static void s3c_hsotg_epint(struct s3c_hsotg *hsotg, unsigned int idx,
-			    int dir_in)
-{
-	struct s3c_hsotg_ep *hs_ep = &hsotg->eps[idx];
-	u32 epint_reg = dir_in ? DIEPINT(idx) : DOEPINT(idx);
-	u32 epctl_reg = dir_in ? DIEPCTL(idx) : DOEPCTL(idx);
-	u32 epsiz_reg = dir_in ? DIEPTSIZ(idx) : DOEPTSIZ(idx);
-	u32 ints;
-	u32 ctrl;
-
-	ints = readl(hsotg->regs + epint_reg);
-	ctrl = readl(hsotg->regs + epctl_reg);
-
-	/* Clear endpoint interrupts */
-	writel(ints, hsotg->regs + epint_reg);
-
-	dev_dbg(hsotg->dev, "%s: ep%d(%s) DxEPINT=0x%08x\n",
-		__func__, idx, dir_in ? "in" : "out", ints);
-
-	if (ints & DxEPINT_XferCompl) {
-		if (hs_ep->isochronous && hs_ep->interval == 1) {
-			if (ctrl & DxEPCTL_EOFrNum)
-				ctrl |= DxEPCTL_SetEvenFr;
-			else
-				ctrl |= DxEPCTL_SetOddFr;
-			writel(ctrl, hsotg->regs + epctl_reg);
-		}
-
-		dev_dbg(hsotg->dev,
-			"%s: XferCompl: DxEPCTL=0x%08x, DxEPTSIZ=%08x\n",
-			__func__, readl(hsotg->regs + epctl_reg),
-			readl(hsotg->regs + epsiz_reg));
-
-		/*
-		 * we get OutDone from the FIFO, so we only need to look
-		 * at completing IN requests here
-		 */
-		if (dir_in) {
-			s3c_hsotg_complete_in(hsotg, hs_ep);
-
-			if (idx == 0 && !hs_ep->req)
-				s3c_hsotg_enqueue_setup(hsotg);
-		} else if (using_dma(hsotg)) {
-			/*
-			 * We're using DMA, we need to fire an OutDone here
-			 * as we ignore the RXFIFO.
-			 */
-
-			s3c_hsotg_handle_outdone(hsotg, idx, false);
-		}
-	}
-
-	if (ints & DxEPINT_EPDisbld) {
-		dev_dbg(hsotg->dev, "%s: EPDisbld\n", __func__);
-
-		if (dir_in) {
-			int epctl = readl(hsotg->regs + epctl_reg);
-
-			s3c_hsotg_txfifo_flush(hsotg, idx);
-
-			if ((epctl & DxEPCTL_Stall) &&
-				(epctl & DxEPCTL_EPType_Bulk)) {
-				int dctl = readl(hsotg->regs + DCTL);
-
-				dctl |= DCTL_CGNPInNAK;
-				writel(dctl, hsotg->regs + DCTL);
-			}
-		}
-	}
-
-	if (ints & DxEPINT_AHBErr)
-		dev_dbg(hsotg->dev, "%s: AHBErr\n", __func__);
-
-	if (ints & DxEPINT_Setup) {  /* Setup or Timeout */
-		dev_dbg(hsotg->dev, "%s: Setup/Timeout\n",  __func__);
-
-		if (using_dma(hsotg) && idx == 0) {
-			/*
-			 * this is the notification we've received a
-			 * setup packet. In non-DMA mode we'd get this
-			 * from the RXFIFO, instead we need to process
-			 * the setup here.
-			 */
-
-			if (dir_in)
-				WARN_ON_ONCE(1);
-			else
-				s3c_hsotg_handle_outdone(hsotg, 0, true);
-		}
-	}
-
-	if (ints & DxEPINT_Back2BackSetup)
-		dev_dbg(hsotg->dev, "%s: B2BSetup/INEPNakEff\n", __func__);
-
-	if (dir_in && !hs_ep->isochronous) {
-		/* not sure if this is important, but we'll clear it anyway */
-		if (ints & DIEPMSK_INTknTXFEmpMsk) {
-			dev_dbg(hsotg->dev, "%s: ep%d: INTknTXFEmpMsk\n",
-				__func__, idx);
-		}
-
-		/* this probably means something bad is happening */
-		if (ints & DIEPMSK_INTknEPMisMsk) {
-			dev_warn(hsotg->dev, "%s: ep%d: INTknEP\n",
-				 __func__, idx);
-		}
-
-		/* FIFO has space or is empty (see GAHBCFG) */
-		if (hsotg->dedicated_fifos &&
-		    ints & DIEPMSK_TxFIFOEmpty) {
-			dev_dbg(hsotg->dev, "%s: ep%d: TxFIFOEmpty\n",
-				__func__, idx);
-			if (!using_dma(hsotg))
-				s3c_hsotg_trytx(hsotg, hs_ep);
-		}
-	}
-}
-
-/**
- * s3c_hsotg_irq_enumdone - Handle EnumDone interrupt (enumeration done)
- * @hsotg: The device state.
- *
- * Handle updating the device settings after the enumeration phase has
- * been completed.
- */
-static void s3c_hsotg_irq_enumdone(struct s3c_hsotg *hsotg)
-{
-	u32 dsts = readl(hsotg->regs + DSTS);
-	int ep0_mps = 0, ep_mps;
-
-	/*
-	 * This should signal the finish of the enumeration phase
-	 * of the USB handshaking, so we should now know what rate
-	 * we connected at.
-	 */
-
-	dev_dbg(hsotg->dev, "EnumDone (DSTS=0x%08x)\n", dsts);
-
-	/*
-	 * note, since we're limited by the size of transfer on EP0, and
-	 * it seems IN transfers must be a even number of packets we do
-	 * not advertise a 64byte MPS on EP0.
-	 */
-
-	/* catch both EnumSpd_FS and EnumSpd_FS48 */
-	switch (dsts & DSTS_EnumSpd_MASK) {
-	case DSTS_EnumSpd_FS:
-	case DSTS_EnumSpd_FS48:
-		hsotg->gadget.speed = USB_SPEED_FULL;
-		ep0_mps = EP0_MPS_LIMIT;
-		ep_mps = 1023;
-		break;
-
-	case DSTS_EnumSpd_HS:
-		hsotg->gadget.speed = USB_SPEED_HIGH;
-		ep0_mps = EP0_MPS_LIMIT;
-		ep_mps = 1024;
-		break;
-
-	case DSTS_EnumSpd_LS:
-		hsotg->gadget.speed = USB_SPEED_LOW;
-		/*
-		 * note, we don't actually support LS in this driver at the
-		 * moment, and the documentation seems to imply that it isn't
-		 * supported by the PHYs on some of the devices.
-		 */
-		break;
-	}
-	dev_info(hsotg->dev, "new device is %s\n",
-		 usb_speed_string(hsotg->gadget.speed));
-
-	/*
-	 * we should now know the maximum packet size for an
-	 * endpoint, so set the endpoints to a default value.
-	 */
-
-	if (ep0_mps) {
-		int i;
-		s3c_hsotg_set_ep_maxpacket(hsotg, 0, ep0_mps);
-		for (i = 1; i < hsotg->num_of_eps; i++)
-			s3c_hsotg_set_ep_maxpacket(hsotg, i, ep_mps);
-	}
-
-	/* ensure after enumeration our EP0 is active */
-
-	s3c_hsotg_enqueue_setup(hsotg);
-
-	dev_dbg(hsotg->dev, "EP0: DIEPCTL0=0x%08x, DOEPCTL0=0x%08x\n",
-		readl(hsotg->regs + DIEPCTL0),
-		readl(hsotg->regs + DOEPCTL0));
-}
-
-/**
- * kill_all_requests - remove all requests from the endpoint's queue
- * @hsotg: The device state.
- * @ep: The endpoint the requests may be on.
- * @result: The result code to use.
- * @force: Force removal of any current requests
- *
- * Go through the requests on the given endpoint and mark them
- * completed with the given result code.
- */
-static void kill_all_requests(struct s3c_hsotg *hsotg,
-			      struct s3c_hsotg_ep *ep,
-			      int result, bool force)
-{
-	struct s3c_hsotg_req *req, *treq;
-
-	list_for_each_entry_safe(req, treq, &ep->queue, queue) {
-		/*
-		 * currently, we can't do much about an already
-		 * running request on an in endpoint
-		 */
-
-		if (ep->req == req && ep->dir_in && !force)
-			continue;
-
-		s3c_hsotg_complete_request(hsotg, ep, req,
-					   result);
-	}
-	if(hsotg->dedicated_fifos)
-		if ((readl(hsotg->regs + DTXFSTS(ep->index)) & 0xffff) * 4 < 3072)
-			s3c_hsotg_txfifo_flush(hsotg, ep->index);
-}
-
-#define call_gadget(_hs, _entry) \
-do { \
-	if ((_hs)->gadget.speed != USB_SPEED_UNKNOWN &&	\
-	    (_hs)->driver && (_hs)->driver->_entry) { \
-		spin_unlock(&_hs->lock); \
-		(_hs)->driver->_entry(&(_hs)->gadget); \
-		spin_lock(&_hs->lock); \
-	} \
-} while (0)
-
-/**
- * s3c_hsotg_disconnect - disconnect service
- * @hsotg: The device state.
- *
- * The device has been disconnected. Remove all current
- * transactions and signal the gadget driver that this
- * has happened.
- */
-static void s3c_hsotg_disconnect(struct s3c_hsotg *hsotg)
-{
-	unsigned ep;
-
-	for (ep = 0; ep < hsotg->num_of_eps; ep++)
-		kill_all_requests(hsotg, &hsotg->eps[ep], -ESHUTDOWN, true);
-
-	call_gadget(hsotg, disconnect);
-}
-
-/**
- * s3c_hsotg_irq_fifoempty - TX FIFO empty interrupt handler
- * @hsotg: The device state:
- * @periodic: True if this is a periodic FIFO interrupt
- */
-static void s3c_hsotg_irq_fifoempty(struct s3c_hsotg *hsotg, bool periodic)
-{
-	struct s3c_hsotg_ep *ep;
-	int epno, ret;
-
-	/* look through for any more data to transmit */
-
-	for (epno = 0; epno < hsotg->num_of_eps; epno++) {
-		ep = &hsotg->eps[epno];
-
-		if (!ep->dir_in)
-			continue;
-
-		if ((periodic && !ep->periodic) ||
-		    (!periodic && ep->periodic))
-			continue;
-
-		ret = s3c_hsotg_trytx(hsotg, ep);
-		if (ret < 0)
-			break;
-	}
-}
-
-/* IRQ flags which will trigger a retry around the IRQ loop */
-#define IRQ_RETRY_MASK (GINTSTS_NPTxFEmp | \
-			GINTSTS_PTxFEmp |  \
-			GINTSTS_RxFLvl)
-
-/**
- * s3c_hsotg_corereset - issue softreset to the core
- * @hsotg: The device state
- *
- * Issue a soft reset to the core, and await the core finishing it.
- */
-static int s3c_hsotg_corereset(struct s3c_hsotg *hsotg)
-{
-	int timeout;
-	u32 grstctl;
-
-	dev_dbg(hsotg->dev, "resetting core\n");
-
-	/* issue soft reset */
-	writel(GRSTCTL_CSftRst, hsotg->regs + GRSTCTL);
-
-	timeout = 10000;
-	do {
-		grstctl = readl(hsotg->regs + GRSTCTL);
-	} while ((grstctl & GRSTCTL_CSftRst) && timeout-- > 0);
-
-	if (grstctl & GRSTCTL_CSftRst) {
-		dev_err(hsotg->dev, "Failed to get CSftRst asserted\n");
-		return -EINVAL;
-	}
-
-	timeout = 10000;
-
-	while (1) {
-		u32 grstctl = readl(hsotg->regs + GRSTCTL);
-
-		if (timeout-- < 0) {
-			dev_info(hsotg->dev,
-				 "%s: reset failed, GRSTCTL=%08x\n",
-				 __func__, grstctl);
-			return -ETIMEDOUT;
-		}
-
-		if (!(grstctl & GRSTCTL_AHBIdle))
-			continue;
-
-		break;		/* reset done */
-	}
-
-	dev_dbg(hsotg->dev, "reset successful\n");
-	return 0;
-}
-
-/**
- * s3c_hsotg_core_init - issue softreset to the core
- * @hsotg: The device state
- *
- * Issue a soft reset to the core, and await the core finishing it.
- */
-static void s3c_hsotg_core_init(struct s3c_hsotg *hsotg)
-{
-	s3c_hsotg_corereset(hsotg);
-
-	/*
-	 * we must now enable ep0 ready for host detection and then
-	 * set configuration.
-	 */
-
-	/* set the PLL on, remove the HNP/SRP and set the PHY */
-	writel(hsotg->phyif | GUSBCFG_TOutCal(7) |
-	       (0x5 << 10), hsotg->regs + GUSBCFG);
-
-	s3c_hsotg_init_fifo(hsotg);
-
-	__orr32(hsotg->regs + DCTL, DCTL_SftDiscon);
-
-	writel(1 << 18 | DCFG_DevSpd_HS,  hsotg->regs + DCFG);
-
-	/* Clear any pending OTG interrupts */
-	writel(0xffffffff, hsotg->regs + GOTGINT);
-
-	/* Clear any pending interrupts */
-	writel(0xffffffff, hsotg->regs + GINTSTS);
-
-	writel(GINTSTS_ErlySusp | GINTSTS_SessReqInt |
-	       GINTSTS_GOUTNakEff | GINTSTS_GINNakEff |
-	       GINTSTS_ConIDStsChng | GINTSTS_USBRst |
-	       GINTSTS_EnumDone | GINTSTS_OTGInt |
-	       GINTSTS_USBSusp | GINTSTS_WkUpInt,
-	       hsotg->regs + GINTMSK);
-
-	if (using_dma(hsotg))
-		writel(GAHBCFG_GlblIntrEn | GAHBCFG_DMAEn |
-		       GAHBCFG_HBstLen_Incr4,
-		       hsotg->regs + GAHBCFG);
-	else
-		writel(((hsotg->dedicated_fifos) ? (GAHBCFG_NPTxFEmpLvl |
-						    GAHBCFG_PTxFEmpLvl) : 0) |
-		       GAHBCFG_GlblIntrEn,
-		       hsotg->regs + GAHBCFG);
-
-	/*
-	 * If INTknTXFEmpMsk is enabled, it's important to disable ep interrupts
-	 * when we have no data to transfer. Otherwise we get being flooded by
-	 * interrupts.
-	 */
-
-	writel(((hsotg->dedicated_fifos) ? DIEPMSK_TxFIFOEmpty |
-	       DIEPMSK_INTknTXFEmpMsk : 0) |
-	       DIEPMSK_EPDisbldMsk | DIEPMSK_XferComplMsk |
-	       DIEPMSK_TimeOUTMsk | DIEPMSK_AHBErrMsk |
-	       DIEPMSK_INTknEPMisMsk,
-	       hsotg->regs + DIEPMSK);
-
-	/*
-	 * don't need XferCompl, we get that from RXFIFO in slave mode. In
-	 * DMA mode we may need this.
-	 */
-	writel((using_dma(hsotg) ? (DIEPMSK_XferComplMsk |
-				    DIEPMSK_TimeOUTMsk) : 0) |
-	       DOEPMSK_EPDisbldMsk | DOEPMSK_AHBErrMsk |
-	       DOEPMSK_SetupMsk,
-	       hsotg->regs + DOEPMSK);
-
-	writel(0, hsotg->regs + DAINTMSK);
-
-	dev_dbg(hsotg->dev, "EP0: DIEPCTL0=0x%08x, DOEPCTL0=0x%08x\n",
-		readl(hsotg->regs + DIEPCTL0),
-		readl(hsotg->regs + DOEPCTL0));
-
-	/* enable in and out endpoint interrupts */
-	s3c_hsotg_en_gsint(hsotg, GINTSTS_OEPInt | GINTSTS_IEPInt);
-
-	/*
-	 * Enable the RXFIFO when in slave mode, as this is how we collect
-	 * the data. In DMA mode, we get events from the FIFO but also
-	 * things we cannot process, so do not use it.
-	 */
-	if (!using_dma(hsotg))
-		s3c_hsotg_en_gsint(hsotg, GINTSTS_RxFLvl);
-
-	/* Enable interrupts for EP0 in and out */
-	s3c_hsotg_ctrl_epint(hsotg, 0, 0, 1);
-	s3c_hsotg_ctrl_epint(hsotg, 0, 1, 1);
-
-	__orr32(hsotg->regs + DCTL, DCTL_PWROnPrgDone);
-	udelay(10);  /* see openiboot */
-	__bic32(hsotg->regs + DCTL, DCTL_PWROnPrgDone);
-
-	dev_dbg(hsotg->dev, "DCTL=0x%08x\n", readl(hsotg->regs + DCTL));
-
-	/*
-	 * DxEPCTL_USBActEp says RO in manual, but seems to be set by
-	 * writing to the EPCTL register..
-	 */
-
-	/* set to read 1 8byte packet */
-	writel(DxEPTSIZ_MC(1) | DxEPTSIZ_PktCnt(1) |
-	       DxEPTSIZ_XferSize(8), hsotg->regs + DOEPTSIZ0);
-
-	writel(s3c_hsotg_ep0_mps(hsotg->eps[0].ep.maxpacket) |
-	       DxEPCTL_CNAK | DxEPCTL_EPEna |
-	       DxEPCTL_USBActEp,
-	       hsotg->regs + DOEPCTL0);
-
-	/* enable, but don't activate EP0in */
-	writel(s3c_hsotg_ep0_mps(hsotg->eps[0].ep.maxpacket) |
-	       DxEPCTL_USBActEp, hsotg->regs + DIEPCTL0);
-
-	s3c_hsotg_enqueue_setup(hsotg);
-
-	dev_dbg(hsotg->dev, "EP0: DIEPCTL0=0x%08x, DOEPCTL0=0x%08x\n",
-		readl(hsotg->regs + DIEPCTL0),
-		readl(hsotg->regs + DOEPCTL0));
-
-	/* clear global NAKs */
-	writel(DCTL_CGOUTNak | DCTL_CGNPInNAK,
-	       hsotg->regs + DCTL);
-
-	/* must be at-least 3ms to allow bus to see disconnect */
-	mdelay(3);
-
-	/* remove the soft-disconnect and let's go */
-	__bic32(hsotg->regs + DCTL, DCTL_SftDiscon);
-}
-
-/**
- * s3c_hsotg_irq - handle device interrupt
- * @irq: The IRQ number triggered
- * @pw: The pw value when registered the handler.
- */
-static irqreturn_t s3c_hsotg_irq(int irq, void *pw)
-{
-	struct s3c_hsotg *hsotg = pw;
-	int retry_count = 8;
-	u32 gintsts;
-	u32 gintmsk;
-
-	spin_lock(&hsotg->lock);
-irq_retry:
-	gintsts = readl(hsotg->regs + GINTSTS);
-	gintmsk = readl(hsotg->regs + GINTMSK);
-
-	dev_dbg(hsotg->dev, "%s: %08x %08x (%08x) retry %d\n",
-		__func__, gintsts, gintsts & gintmsk, gintmsk, retry_count);
-
-	gintsts &= gintmsk;
-
-	if (gintsts & GINTSTS_OTGInt) {
-		u32 otgint = readl(hsotg->regs + GOTGINT);
-
-		dev_info(hsotg->dev, "OTGInt: %08x\n", otgint);
-
-		writel(otgint, hsotg->regs + GOTGINT);
-	}
-
-	if (gintsts & GINTSTS_SessReqInt) {
-		dev_dbg(hsotg->dev, "%s: SessReqInt\n", __func__);
-		writel(GINTSTS_SessReqInt, hsotg->regs + GINTSTS);
-	}
-
-	if (gintsts & GINTSTS_EnumDone) {
-		writel(GINTSTS_EnumDone, hsotg->regs + GINTSTS);
-
-		s3c_hsotg_irq_enumdone(hsotg);
-	}
-
-	if (gintsts & GINTSTS_ConIDStsChng) {
-		dev_dbg(hsotg->dev, "ConIDStsChg (DSTS=0x%08x, GOTCTL=%08x)\n",
-			readl(hsotg->regs + DSTS),
-			readl(hsotg->regs + GOTGCTL));
-
-		writel(GINTSTS_ConIDStsChng, hsotg->regs + GINTSTS);
-	}
-
-	if (gintsts & (GINTSTS_OEPInt | GINTSTS_IEPInt)) {
-		u32 daint = readl(hsotg->regs + DAINT);
-		u32 daintmsk = readl(hsotg->regs + DAINTMSK);
-		u32 daint_out, daint_in;
-		int ep;
-
-		daint &= daintmsk;
-		daint_out = daint >> DAINT_OutEP_SHIFT;
-		daint_in = daint & ~(daint_out << DAINT_OutEP_SHIFT);
-
-		dev_dbg(hsotg->dev, "%s: daint=%08x\n", __func__, daint);
-
-		for (ep = 0; ep < 15 && daint_out; ep++, daint_out >>= 1) {
-			if (daint_out & 1)
-				s3c_hsotg_epint(hsotg, ep, 0);
-		}
-
-		for (ep = 0; ep < 15 && daint_in; ep++, daint_in >>= 1) {
-			if (daint_in & 1)
-				s3c_hsotg_epint(hsotg, ep, 1);
-		}
-	}
-
-	if (gintsts & GINTSTS_USBRst) {
-
-		u32 usb_status = readl(hsotg->regs + GOTGCTL);
-
-		dev_info(hsotg->dev, "%s: USBRst\n", __func__);
-		dev_dbg(hsotg->dev, "GNPTXSTS=%08x\n",
-			readl(hsotg->regs + GNPTXSTS));
-
-		writel(GINTSTS_USBRst, hsotg->regs + GINTSTS);
-
-		if (usb_status & GOTGCTL_BSESVLD) {
-			if (time_after(jiffies, hsotg->last_rst +
-				       msecs_to_jiffies(200))) {
-
-				kill_all_requests(hsotg, &hsotg->eps[0],
-							  -ECONNRESET, true);
-
-				s3c_hsotg_core_init(hsotg);
-				hsotg->last_rst = jiffies;
-			}
-		}
-	}
-
-	/* check both FIFOs */
-
-	if (gintsts & GINTSTS_NPTxFEmp) {
-		dev_dbg(hsotg->dev, "NPTxFEmp\n");
-
-		/*
-		 * Disable the interrupt to stop it happening again
-		 * unless one of these endpoint routines decides that
-		 * it needs re-enabling
-		 */
-
-		s3c_hsotg_disable_gsint(hsotg, GINTSTS_NPTxFEmp);
-		s3c_hsotg_irq_fifoempty(hsotg, false);
-	}
-
-	if (gintsts & GINTSTS_PTxFEmp) {
-		dev_dbg(hsotg->dev, "PTxFEmp\n");
-
-		/* See note in GINTSTS_NPTxFEmp */
-
-		s3c_hsotg_disable_gsint(hsotg, GINTSTS_PTxFEmp);
-		s3c_hsotg_irq_fifoempty(hsotg, true);
-	}
-
-	if (gintsts & GINTSTS_RxFLvl) {
-		/*
-		 * note, since GINTSTS_RxFLvl doubles as FIFO-not-empty,
-		 * we need to retry s3c_hsotg_handle_rx if this is still
-		 * set.
-		 */
-
-		s3c_hsotg_handle_rx(hsotg);
-	}
-
-	if (gintsts & GINTSTS_ModeMis) {
-		dev_warn(hsotg->dev, "warning, mode mismatch triggered\n");
-		writel(GINTSTS_ModeMis, hsotg->regs + GINTSTS);
-	}
-
-	if (gintsts & GINTSTS_USBSusp) {
-		dev_info(hsotg->dev, "GINTSTS_USBSusp\n");
-		writel(GINTSTS_USBSusp, hsotg->regs + GINTSTS);
-
-		call_gadget(hsotg, suspend);
-	}
-
-	if (gintsts & GINTSTS_WkUpInt) {
-		dev_info(hsotg->dev, "GINTSTS_WkUpIn\n");
-		writel(GINTSTS_WkUpInt, hsotg->regs + GINTSTS);
-
-		call_gadget(hsotg, resume);
-	}
-
-	if (gintsts & GINTSTS_ErlySusp) {
-		dev_dbg(hsotg->dev, "GINTSTS_ErlySusp\n");
-		writel(GINTSTS_ErlySusp, hsotg->regs + GINTSTS);
-	}
-
-	/*
-	 * these next two seem to crop-up occasionally causing the core
-	 * to shutdown the USB transfer, so try clearing them and logging
-	 * the occurrence.
-	 */
-
-	if (gintsts & GINTSTS_GOUTNakEff) {
-		dev_info(hsotg->dev, "GOUTNakEff triggered\n");
-
-		writel(DCTL_CGOUTNak, hsotg->regs + DCTL);
-
-		s3c_hsotg_dump(hsotg);
-	}
-
-	if (gintsts & GINTSTS_GINNakEff) {
-		dev_info(hsotg->dev, "GINNakEff triggered\n");
-
-		writel(DCTL_CGNPInNAK, hsotg->regs + DCTL);
-
-		s3c_hsotg_dump(hsotg);
-	}
-
-	/*
-	 * if we've had fifo events, we should try and go around the
-	 * loop again to see if there's any point in returning yet.
-	 */
-
-	if (gintsts & IRQ_RETRY_MASK && --retry_count > 0)
-			goto irq_retry;
-
-	spin_unlock(&hsotg->lock);
-
-	return IRQ_HANDLED;
-}
-
-/**
- * s3c_hsotg_ep_enable - enable the given endpoint
- * @ep: The USB endpint to configure
- * @desc: The USB endpoint descriptor to configure with.
- *
- * This is called from the USB gadget code's usb_ep_enable().
- */
-static int s3c_hsotg_ep_enable(struct usb_ep *ep,
-			       const struct usb_endpoint_descriptor *desc)
-{
-	struct s3c_hsotg_ep *hs_ep = our_ep(ep);
-	struct s3c_hsotg *hsotg = hs_ep->parent;
-	unsigned long flags;
-	int index = hs_ep->index;
-	u32 epctrl_reg;
-	u32 epctrl;
-	u32 mps;
-	int dir_in;
-	int ret = 0;
-
-	dev_dbg(hsotg->dev,
-		"%s: ep %s: a 0x%02x, attr 0x%02x, mps 0x%04x, intr %d\n",
-		__func__, ep->name, desc->bEndpointAddress, desc->bmAttributes,
-		desc->wMaxPacketSize, desc->bInterval);
-
-	/* not to be called for EP0 */
-	WARN_ON(index == 0);
-
-	dir_in = (desc->bEndpointAddress & USB_ENDPOINT_DIR_MASK) ? 1 : 0;
-	if (dir_in != hs_ep->dir_in) {
-		dev_err(hsotg->dev, "%s: direction mismatch!\n", __func__);
-		return -EINVAL;
-	}
-
-	mps = usb_endpoint_maxp(desc);
-
-	/* note, we handle this here instead of s3c_hsotg_set_ep_maxpacket */
-
-	epctrl_reg = dir_in ? DIEPCTL(index) : DOEPCTL(index);
-	epctrl = readl(hsotg->regs + epctrl_reg);
-
-	dev_dbg(hsotg->dev, "%s: read DxEPCTL=0x%08x from 0x%08x\n",
-		__func__, epctrl, epctrl_reg);
-
-	spin_lock_irqsave(&hsotg->lock, flags);
-
-	epctrl &= ~(DxEPCTL_EPType_MASK | DxEPCTL_MPS_MASK);
-	epctrl |= DxEPCTL_MPS(mps);
-
-	/*
-	 * mark the endpoint as active, otherwise the core may ignore
-	 * transactions entirely for this endpoint
-	 */
-	epctrl |= DxEPCTL_USBActEp;
-
-	/*
-	 * set the NAK status on the endpoint, otherwise we might try and
-	 * do something with data that we've yet got a request to process
-	 * since the RXFIFO will take data for an endpoint even if the
-	 * size register hasn't been set.
-	 */
-
-	epctrl |= DxEPCTL_SNAK;
-
-	/* update the endpoint state */
-	s3c_hsotg_set_ep_maxpacket(hsotg, hs_ep->index, mps);
-
-	/* default, set to non-periodic */
-	hs_ep->isochronous = 0;
-	hs_ep->periodic = 0;
-	hs_ep->halted = 0;
-	hs_ep->interval = desc->bInterval;
-
-	if (hs_ep->interval > 1 && hs_ep->mc > 1)
-		dev_err(hsotg->dev, "MC > 1 when interval is not 1\n");
-
-	switch (desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) {
-	case USB_ENDPOINT_XFER_ISOC:
-		epctrl |= DxEPCTL_EPType_Iso;
-		epctrl |= DxEPCTL_SetEvenFr;
-		hs_ep->isochronous = 1;
-		if (dir_in)
-			hs_ep->periodic = 1;
-		break;
-
-	case USB_ENDPOINT_XFER_BULK:
-		epctrl |= DxEPCTL_EPType_Bulk;
-		break;
-
-	case USB_ENDPOINT_XFER_INT:
-		if (dir_in) {
-			/*
-			 * Allocate our TxFNum by simply using the index
-			 * of the endpoint for the moment. We could do
-			 * something better if the host indicates how
-			 * many FIFOs we are expecting to use.
-			 */
-
-			hs_ep->periodic = 1;
-			epctrl |= DxEPCTL_TxFNum(index);
-		}
-
-		epctrl |= DxEPCTL_EPType_Intterupt;
-		break;
-
-	case USB_ENDPOINT_XFER_CONTROL:
-		epctrl |= DxEPCTL_EPType_Control;
-		break;
-	}
-
-	/*
-	 * if the hardware has dedicated fifos, we must give each IN EP
-	 * a unique tx-fifo even if it is non-periodic.
-	 */
-	if (dir_in && hsotg->dedicated_fifos)
-		epctrl |= DxEPCTL_TxFNum(index);
-
-	/* for non control endpoints, set PID to D0 */
-	if (index)
-		epctrl |= DxEPCTL_SetD0PID;
-
-	dev_dbg(hsotg->dev, "%s: write DxEPCTL=0x%08x\n",
-		__func__, epctrl);
-
-	writel(epctrl, hsotg->regs + epctrl_reg);
-	dev_dbg(hsotg->dev, "%s: read DxEPCTL=0x%08x\n",
-		__func__, readl(hsotg->regs + epctrl_reg));
-
-	/* enable the endpoint interrupt */
-	s3c_hsotg_ctrl_epint(hsotg, index, dir_in, 1);
-
-	spin_unlock_irqrestore(&hsotg->lock, flags);
-	return ret;
-}
-
-/**
- * s3c_hsotg_ep_disable - disable given endpoint
- * @ep: The endpoint to disable.
- */
-static int s3c_hsotg_ep_disable(struct usb_ep *ep)
-{
-	struct s3c_hsotg_ep *hs_ep = our_ep(ep);
-	struct s3c_hsotg *hsotg = hs_ep->parent;
-	int dir_in = hs_ep->dir_in;
-	int index = hs_ep->index;
-	unsigned long flags;
-	u32 epctrl_reg;
-	u32 ctrl;
-
-	dev_info(hsotg->dev, "%s(ep %p)\n", __func__, ep);
-
-	if (ep == &hsotg->eps[0].ep) {
-		dev_err(hsotg->dev, "%s: called for ep0\n", __func__);
-		return -EINVAL;
-	}
-
-	epctrl_reg = dir_in ? DIEPCTL(index) : DOEPCTL(index);
-
-	spin_lock_irqsave(&hsotg->lock, flags);
-	/* terminate all requests with shutdown */
-	kill_all_requests(hsotg, hs_ep, -ESHUTDOWN, false);
-
-
-	ctrl = readl(hsotg->regs + epctrl_reg);
-	ctrl &= ~DxEPCTL_EPEna;
-	ctrl &= ~DxEPCTL_USBActEp;
-	ctrl |= DxEPCTL_SNAK;
-
-	dev_dbg(hsotg->dev, "%s: DxEPCTL=0x%08x\n", __func__, ctrl);
-	writel(ctrl, hsotg->regs + epctrl_reg);
-
-	/* disable endpoint interrupts */
-	s3c_hsotg_ctrl_epint(hsotg, hs_ep->index, hs_ep->dir_in, 0);
-
-	spin_unlock_irqrestore(&hsotg->lock, flags);
-	return 0;
-}
-
-/**
- * on_list - check request is on the given endpoint
- * @ep: The endpoint to check.
- * @test: The request to test if it is on the endpoint.
- */
-static bool on_list(struct s3c_hsotg_ep *ep, struct s3c_hsotg_req *test)
-{
-	struct s3c_hsotg_req *req, *treq;
-
-	list_for_each_entry_safe(req, treq, &ep->queue, queue) {
-		if (req == test)
-			return true;
-	}
-
-	return false;
-}
-
-/**
- * s3c_hsotg_ep_dequeue - dequeue given endpoint
- * @ep: The endpoint to dequeue.
- * @req: The request to be removed from a queue.
- */
-static int s3c_hsotg_ep_dequeue(struct usb_ep *ep, struct usb_request *req)
-{
-	struct s3c_hsotg_req *hs_req = our_req(req);
-	struct s3c_hsotg_ep *hs_ep = our_ep(ep);
-	struct s3c_hsotg *hs = hs_ep->parent;
-	unsigned long flags;
-
-	dev_info(hs->dev, "ep_dequeue(%p,%p)\n", ep, req);
-
-	spin_lock_irqsave(&hs->lock, flags);
-
-	if (!on_list(hs_ep, hs_req)) {
-		spin_unlock_irqrestore(&hs->lock, flags);
-		return -EINVAL;
-	}
-
-	s3c_hsotg_complete_request(hs, hs_ep, hs_req, -ECONNRESET);
-	spin_unlock_irqrestore(&hs->lock, flags);
-
-	return 0;
-}
-
-/**
- * s3c_hsotg_ep_sethalt - set halt on a given endpoint
- * @ep: The endpoint to set halt.
- * @value: Set or unset the halt.
- */
-static int s3c_hsotg_ep_sethalt(struct usb_ep *ep, int value)
-{
-	struct s3c_hsotg_ep *hs_ep = our_ep(ep);
-	struct s3c_hsotg *hs = hs_ep->parent;
-	int index = hs_ep->index;
-	u32 epreg;
-	u32 epctl;
-	u32 xfertype;
-
-	dev_info(hs->dev, "%s(ep %p %s, %d)\n", __func__, ep, ep->name, value);
-
-	if (index == 0) {
-		if (value)
-			s3c_hsotg_stall_ep0(hs);
-		else
-			dev_warn(hs->dev,
-				 "%s: can't clear halt on ep0\n", __func__);
-		return 0;
-	}
-
-	/* write both IN and OUT control registers */
-
-	epreg = DIEPCTL(index);
-	epctl = readl(hs->regs + epreg);
-
-	if (value) {
-		epctl |= DxEPCTL_Stall + DxEPCTL_SNAK;
-		if (epctl & DxEPCTL_EPEna)
-			epctl |= DxEPCTL_EPDis;
-	} else {
-		epctl &= ~DxEPCTL_Stall;
-		xfertype = epctl & DxEPCTL_EPType_MASK;
-		if (xfertype == DxEPCTL_EPType_Bulk ||
-			xfertype == DxEPCTL_EPType_Intterupt)
-				epctl |= DxEPCTL_SetD0PID;
-	}
-
-	writel(epctl, hs->regs + epreg);
-
-	epreg = DOEPCTL(index);
-	epctl = readl(hs->regs + epreg);
-
-	if (value)
-		epctl |= DxEPCTL_Stall;
-	else {
-		epctl &= ~DxEPCTL_Stall;
-		xfertype = epctl & DxEPCTL_EPType_MASK;
-		if (xfertype == DxEPCTL_EPType_Bulk ||
-			xfertype == DxEPCTL_EPType_Intterupt)
-				epctl |= DxEPCTL_SetD0PID;
-	}
-
-	writel(epctl, hs->regs + epreg);
-
-	hs_ep->halted = value;
-
-	return 0;
-}
-
-/**
- * s3c_hsotg_ep_sethalt_lock - set halt on a given endpoint with lock held
- * @ep: The endpoint to set halt.
- * @value: Set or unset the halt.
- */
-static int s3c_hsotg_ep_sethalt_lock(struct usb_ep *ep, int value)
-{
-	struct s3c_hsotg_ep *hs_ep = our_ep(ep);
-	struct s3c_hsotg *hs = hs_ep->parent;
-	unsigned long flags = 0;
-	int ret = 0;
-
-	spin_lock_irqsave(&hs->lock, flags);
-	ret = s3c_hsotg_ep_sethalt(ep, value);
-	spin_unlock_irqrestore(&hs->lock, flags);
-
-	return ret;
-}
-
-static struct usb_ep_ops s3c_hsotg_ep_ops = {
-	.enable		= s3c_hsotg_ep_enable,
-	.disable	= s3c_hsotg_ep_disable,
-	.alloc_request	= s3c_hsotg_ep_alloc_request,
-	.free_request	= s3c_hsotg_ep_free_request,
-	.queue		= s3c_hsotg_ep_queue_lock,
-	.dequeue	= s3c_hsotg_ep_dequeue,
-	.set_halt	= s3c_hsotg_ep_sethalt_lock,
-	/* note, don't believe we have any call for the fifo routines */
-};
-
-/**
- * s3c_hsotg_phy_enable - enable platform phy dev
- * @hsotg: The driver state
- *
- * A wrapper for platform code responsible for controlling
- * low-level USB code
- */
-static void s3c_hsotg_phy_enable(struct s3c_hsotg *hsotg)
-{
-	struct platform_device *pdev = to_platform_device(hsotg->dev);
-
-	dev_dbg(hsotg->dev, "pdev 0x%p\n", pdev);
-
-	if (hsotg->phy) {
-		phy_init(hsotg->phy);
-		phy_power_on(hsotg->phy);
-	} else if (hsotg->uphy)
-		usb_phy_init(hsotg->uphy);
-	else if (hsotg->plat->phy_init)
-		hsotg->plat->phy_init(pdev, hsotg->plat->phy_type);
-}
-
-/**
- * s3c_hsotg_phy_disable - disable platform phy dev
- * @hsotg: The driver state
- *
- * A wrapper for platform code responsible for controlling
- * low-level USB code
- */
-static void s3c_hsotg_phy_disable(struct s3c_hsotg *hsotg)
-{
-	struct platform_device *pdev = to_platform_device(hsotg->dev);
-
-	if (hsotg->phy) {
-		phy_power_off(hsotg->phy);
-		phy_exit(hsotg->phy);
-	} else if (hsotg->uphy)
-		usb_phy_shutdown(hsotg->uphy);
-	else if (hsotg->plat->phy_exit)
-		hsotg->plat->phy_exit(pdev, hsotg->plat->phy_type);
-}
-
-/**
- * s3c_hsotg_init - initalize the usb core
- * @hsotg: The driver state
- */
-static void s3c_hsotg_init(struct s3c_hsotg *hsotg)
-{
-	/* unmask subset of endpoint interrupts */
-
-	writel(DIEPMSK_TimeOUTMsk | DIEPMSK_AHBErrMsk |
-	       DIEPMSK_EPDisbldMsk | DIEPMSK_XferComplMsk,
-	       hsotg->regs + DIEPMSK);
-
-	writel(DOEPMSK_SetupMsk | DOEPMSK_AHBErrMsk |
-	       DOEPMSK_EPDisbldMsk | DOEPMSK_XferComplMsk,
-	       hsotg->regs + DOEPMSK);
-
-	writel(0, hsotg->regs + DAINTMSK);
-
-	/* Be in disconnected state until gadget is registered */
-	__orr32(hsotg->regs + DCTL, DCTL_SftDiscon);
-
-	if (0) {
-		/* post global nak until we're ready */
-		writel(DCTL_SGNPInNAK | DCTL_SGOUTNak,
-		       hsotg->regs + DCTL);
-	}
-
-	/* setup fifos */
-
-	dev_dbg(hsotg->dev, "GRXFSIZ=0x%08x, GNPTXFSIZ=0x%08x\n",
-		readl(hsotg->regs + GRXFSIZ),
-		readl(hsotg->regs + GNPTXFSIZ));
-
-	s3c_hsotg_init_fifo(hsotg);
-
-	/* set the PLL on, remove the HNP/SRP and set the PHY */
-	writel(GUSBCFG_PHYIf16 | GUSBCFG_TOutCal(7) | (0x5 << 10),
-	       hsotg->regs + GUSBCFG);
-
-	writel(using_dma(hsotg) ? GAHBCFG_DMAEn : 0x0,
-	       hsotg->regs + GAHBCFG);
-}
-
-/**
- * s3c_hsotg_udc_start - prepare the udc for work
- * @gadget: The usb gadget state
- * @driver: The usb gadget driver
- *
- * Perform initialization to prepare udc device and driver
- * to work.
- */
-static int s3c_hsotg_udc_start(struct usb_gadget *gadget,
-			   struct usb_gadget_driver *driver)
-{
-	struct s3c_hsotg *hsotg = to_hsotg(gadget);
-	int ret;
-
-	if (!hsotg) {
-		pr_err("%s: called with no device\n", __func__);
-		return -ENODEV;
-	}
-
-	if (!driver) {
-		dev_err(hsotg->dev, "%s: no driver\n", __func__);
-		return -EINVAL;
-	}
-
-	if (driver->max_speed < USB_SPEED_FULL)
-		dev_err(hsotg->dev, "%s: bad speed\n", __func__);
-
-	if (!driver->setup) {
-		dev_err(hsotg->dev, "%s: missing entry points\n", __func__);
-		return -EINVAL;
-	}
-
-	WARN_ON(hsotg->driver);
-
-	driver->driver.bus = NULL;
-	hsotg->driver = driver;
-	hsotg->gadget.dev.of_node = hsotg->dev->of_node;
-	hsotg->gadget.speed = USB_SPEED_UNKNOWN;
-
-	ret = regulator_bulk_enable(ARRAY_SIZE(hsotg->supplies),
-				    hsotg->supplies);
-	if (ret) {
-		dev_err(hsotg->dev, "failed to enable supplies: %d\n", ret);
-		goto err;
-	}
-
-	hsotg->last_rst = jiffies;
-	dev_info(hsotg->dev, "bound driver %s\n", driver->driver.name);
-	return 0;
-
-err:
-	hsotg->driver = NULL;
-	return ret;
-}
-
-/**
- * s3c_hsotg_udc_stop - stop the udc
- * @gadget: The usb gadget state
- * @driver: The usb gadget driver
- *
- * Stop udc hw block and stay tunned for future transmissions
- */
-static int s3c_hsotg_udc_stop(struct usb_gadget *gadget,
-			  struct usb_gadget_driver *driver)
-{
-	struct s3c_hsotg *hsotg = to_hsotg(gadget);
-	unsigned long flags = 0;
-	int ep;
-
-	if (!hsotg)
-		return -ENODEV;
-
-	/* all endpoints should be shutdown */
-	for (ep = 0; ep < hsotg->num_of_eps; ep++)
-		s3c_hsotg_ep_disable(&hsotg->eps[ep].ep);
-
-	spin_lock_irqsave(&hsotg->lock, flags);
-
-	s3c_hsotg_phy_disable(hsotg);
-
-	if (!driver)
-		hsotg->driver = NULL;
-
-	hsotg->gadget.speed = USB_SPEED_UNKNOWN;
-
-	spin_unlock_irqrestore(&hsotg->lock, flags);
-
-	regulator_bulk_disable(ARRAY_SIZE(hsotg->supplies), hsotg->supplies);
-
-	return 0;
-}
-
-/**
- * s3c_hsotg_gadget_getframe - read the frame number
- * @gadget: The usb gadget state
- *
- * Read the {micro} frame number
- */
-static int s3c_hsotg_gadget_getframe(struct usb_gadget *gadget)
-{
-	return s3c_hsotg_read_frameno(to_hsotg(gadget));
-}
-
-/**
- * s3c_hsotg_pullup - connect/disconnect the USB PHY
- * @gadget: The usb gadget state
- * @is_on: Current state of the USB PHY
- *
- * Connect/Disconnect the USB PHY pullup
- */
-static int s3c_hsotg_pullup(struct usb_gadget *gadget, int is_on)
-{
-	struct s3c_hsotg *hsotg = to_hsotg(gadget);
-	unsigned long flags = 0;
-
-	dev_dbg(hsotg->dev, "%s: is_in: %d\n", __func__, is_on);
-
-	spin_lock_irqsave(&hsotg->lock, flags);
-	if (is_on) {
-		s3c_hsotg_phy_enable(hsotg);
-		s3c_hsotg_core_init(hsotg);
-	} else {
-		s3c_hsotg_disconnect(hsotg);
-		s3c_hsotg_phy_disable(hsotg);
-	}
-
-	hsotg->gadget.speed = USB_SPEED_UNKNOWN;
-	spin_unlock_irqrestore(&hsotg->lock, flags);
-
-	return 0;
-}
-
-static const struct usb_gadget_ops s3c_hsotg_gadget_ops = {
-	.get_frame	= s3c_hsotg_gadget_getframe,
-	.udc_start		= s3c_hsotg_udc_start,
-	.udc_stop		= s3c_hsotg_udc_stop,
-	.pullup                 = s3c_hsotg_pullup,
-};
-
-/**
- * s3c_hsotg_initep - initialise a single endpoint
- * @hsotg: The device state.
- * @hs_ep: The endpoint to be initialised.
- * @epnum: The endpoint number
- *
- * Initialise the given endpoint (as part of the probe and device state
- * creation) to give to the gadget driver. Setup the endpoint name, any
- * direction information and other state that may be required.
- */
-static void s3c_hsotg_initep(struct s3c_hsotg *hsotg,
-				       struct s3c_hsotg_ep *hs_ep,
-				       int epnum)
-{
-	u32 ptxfifo;
-	char *dir;
-
-	if (epnum == 0)
-		dir = "";
-	else if ((epnum % 2) == 0) {
-		dir = "out";
-	} else {
-		dir = "in";
-		hs_ep->dir_in = 1;
-	}
-
-	hs_ep->index = epnum;
-
-	snprintf(hs_ep->name, sizeof(hs_ep->name), "ep%d%s", epnum, dir);
-
-	INIT_LIST_HEAD(&hs_ep->queue);
-	INIT_LIST_HEAD(&hs_ep->ep.ep_list);
-
-	/* add to the list of endpoints known by the gadget driver */
-	if (epnum)
-		list_add_tail(&hs_ep->ep.ep_list, &hsotg->gadget.ep_list);
-
-	hs_ep->parent = hsotg;
-	hs_ep->ep.name = hs_ep->name;
-	usb_ep_set_maxpacket_limit(&hs_ep->ep, epnum ? 1024 : EP0_MPS_LIMIT);
-	hs_ep->ep.ops = &s3c_hsotg_ep_ops;
-
-	/*
-	 * Read the FIFO size for the Periodic TX FIFO, even if we're
-	 * an OUT endpoint, we may as well do this if in future the
-	 * code is changed to make each endpoint's direction changeable.
-	 */
-
-	ptxfifo = readl(hsotg->regs + DPTXFSIZn(epnum));
-	hs_ep->fifo_size = DPTXFSIZn_DPTxFSize_GET(ptxfifo) * 4;
-
-	/*
-	 * if we're using dma, we need to set the next-endpoint pointer
-	 * to be something valid.
-	 */
-
-	if (using_dma(hsotg)) {
-		u32 next = DxEPCTL_NextEp((epnum + 1) % 15);
-		writel(next, hsotg->regs + DIEPCTL(epnum));
-		writel(next, hsotg->regs + DOEPCTL(epnum));
-	}
-}
-
-/**
- * s3c_hsotg_hw_cfg - read HW configuration registers
- * @param: The device state
- *
- * Read the USB core HW configuration registers
- */
-static void s3c_hsotg_hw_cfg(struct s3c_hsotg *hsotg)
-{
-	u32 cfg2, cfg4;
-	/* check hardware configuration */
-
-	cfg2 = readl(hsotg->regs + 0x48);
-	hsotg->num_of_eps = (cfg2 >> 10) & 0xF;
-
-	dev_info(hsotg->dev, "EPs:%d\n", hsotg->num_of_eps);
-
-	cfg4 = readl(hsotg->regs + 0x50);
-	hsotg->dedicated_fifos = (cfg4 >> 25) & 1;
-
-	dev_info(hsotg->dev, "%s fifos\n",
-		 hsotg->dedicated_fifos ? "dedicated" : "shared");
-}
-
-/**
- * s3c_hsotg_dump - dump state of the udc
- * @param: The device state
- */
-static void s3c_hsotg_dump(struct s3c_hsotg *hsotg)
-{
-#ifdef DEBUG
-	struct device *dev = hsotg->dev;
-	void __iomem *regs = hsotg->regs;
-	u32 val;
-	int idx;
-
-	dev_info(dev, "DCFG=0x%08x, DCTL=0x%08x, DIEPMSK=%08x\n",
-		 readl(regs + DCFG), readl(regs + DCTL),
-		 readl(regs + DIEPMSK));
-
-	dev_info(dev, "GAHBCFG=0x%08x, 0x44=0x%08x\n",
-		 readl(regs + GAHBCFG), readl(regs + 0x44));
-
-	dev_info(dev, "GRXFSIZ=0x%08x, GNPTXFSIZ=0x%08x\n",
-		 readl(regs + GRXFSIZ), readl(regs + GNPTXFSIZ));
-
-	/* show periodic fifo settings */
-
-	for (idx = 1; idx <= 15; idx++) {
-		val = readl(regs + DPTXFSIZn(idx));
-		dev_info(dev, "DPTx[%d] FSize=%d, StAddr=0x%08x\n", idx,
-			 val >> DPTXFSIZn_DPTxFSize_SHIFT,
-			 val & DPTXFSIZn_DPTxFStAddr_MASK);
-	}
-
-	for (idx = 0; idx < 15; idx++) {
-		dev_info(dev,
-			 "ep%d-in: EPCTL=0x%08x, SIZ=0x%08x, DMA=0x%08x\n", idx,
-			 readl(regs + DIEPCTL(idx)),
-			 readl(regs + DIEPTSIZ(idx)),
-			 readl(regs + DIEPDMA(idx)));
-
-		val = readl(regs + DOEPCTL(idx));
-		dev_info(dev,
-			 "ep%d-out: EPCTL=0x%08x, SIZ=0x%08x, DMA=0x%08x\n",
-			 idx, readl(regs + DOEPCTL(idx)),
-			 readl(regs + DOEPTSIZ(idx)),
-			 readl(regs + DOEPDMA(idx)));
-
-	}
-
-	dev_info(dev, "DVBUSDIS=0x%08x, DVBUSPULSE=%08x\n",
-		 readl(regs + DVBUSDIS), readl(regs + DVBUSPULSE));
-#endif
-}
-
-/**
- * state_show - debugfs: show overall driver and device state.
- * @seq: The seq file to write to.
- * @v: Unused parameter.
- *
- * This debugfs entry shows the overall state of the hardware and
- * some general information about each of the endpoints available
- * to the system.
- */
-static int state_show(struct seq_file *seq, void *v)
-{
-	struct s3c_hsotg *hsotg = seq->private;
-	void __iomem *regs = hsotg->regs;
-	int idx;
-
-	seq_printf(seq, "DCFG=0x%08x, DCTL=0x%08x, DSTS=0x%08x\n",
-		 readl(regs + DCFG),
-		 readl(regs + DCTL),
-		 readl(regs + DSTS));
-
-	seq_printf(seq, "DIEPMSK=0x%08x, DOEPMASK=0x%08x\n",
-		   readl(regs + DIEPMSK), readl(regs + DOEPMSK));
-
-	seq_printf(seq, "GINTMSK=0x%08x, GINTSTS=0x%08x\n",
-		   readl(regs + GINTMSK),
-		   readl(regs + GINTSTS));
-
-	seq_printf(seq, "DAINTMSK=0x%08x, DAINT=0x%08x\n",
-		   readl(regs + DAINTMSK),
-		   readl(regs + DAINT));
-
-	seq_printf(seq, "GNPTXSTS=0x%08x, GRXSTSR=%08x\n",
-		   readl(regs + GNPTXSTS),
-		   readl(regs + GRXSTSR));
-
-	seq_puts(seq, "\nEndpoint status:\n");
-
-	for (idx = 0; idx < 15; idx++) {
-		u32 in, out;
-
-		in = readl(regs + DIEPCTL(idx));
-		out = readl(regs + DOEPCTL(idx));
-
-		seq_printf(seq, "ep%d: DIEPCTL=0x%08x, DOEPCTL=0x%08x",
-			   idx, in, out);
-
-		in = readl(regs + DIEPTSIZ(idx));
-		out = readl(regs + DOEPTSIZ(idx));
-
-		seq_printf(seq, ", DIEPTSIZ=0x%08x, DOEPTSIZ=0x%08x",
-			   in, out);
-
-		seq_puts(seq, "\n");
-	}
-
-	return 0;
-}
-
-static int state_open(struct inode *inode, struct file *file)
-{
-	return single_open(file, state_show, inode->i_private);
-}
-
-static const struct file_operations state_fops = {
-	.owner		= THIS_MODULE,
-	.open		= state_open,
-	.read		= seq_read,
-	.llseek		= seq_lseek,
-	.release	= single_release,
-};
-
-/**
- * fifo_show - debugfs: show the fifo information
- * @seq: The seq_file to write data to.
- * @v: Unused parameter.
- *
- * Show the FIFO information for the overall fifo and all the
- * periodic transmission FIFOs.
- */
-static int fifo_show(struct seq_file *seq, void *v)
-{
-	struct s3c_hsotg *hsotg = seq->private;
-	void __iomem *regs = hsotg->regs;
-	u32 val;
-	int idx;
-
-	seq_puts(seq, "Non-periodic FIFOs:\n");
-	seq_printf(seq, "RXFIFO: Size %d\n", readl(regs + GRXFSIZ));
-
-	val = readl(regs + GNPTXFSIZ);
-	seq_printf(seq, "NPTXFIFO: Size %d, Start 0x%08x\n",
-		   val >> GNPTXFSIZ_NPTxFDep_SHIFT,
-		   val & GNPTXFSIZ_NPTxFStAddr_MASK);
-
-	seq_puts(seq, "\nPeriodic TXFIFOs:\n");
-
-	for (idx = 1; idx <= 15; idx++) {
-		val = readl(regs + DPTXFSIZn(idx));
-
-		seq_printf(seq, "\tDPTXFIFO%2d: Size %d, Start 0x%08x\n", idx,
-			   val >> DPTXFSIZn_DPTxFSize_SHIFT,
-			   val & DPTXFSIZn_DPTxFStAddr_MASK);
-	}
-
-	return 0;
-}
-
-static int fifo_open(struct inode *inode, struct file *file)
-{
-	return single_open(file, fifo_show, inode->i_private);
-}
-
-static const struct file_operations fifo_fops = {
-	.owner		= THIS_MODULE,
-	.open		= fifo_open,
-	.read		= seq_read,
-	.llseek		= seq_lseek,
-	.release	= single_release,
-};
-
-
-static const char *decode_direction(int is_in)
-{
-	return is_in ? "in" : "out";
-}
-
-/**
- * ep_show - debugfs: show the state of an endpoint.
- * @seq: The seq_file to write data to.
- * @v: Unused parameter.
- *
- * This debugfs entry shows the state of the given endpoint (one is
- * registered for each available).
- */
-static int ep_show(struct seq_file *seq, void *v)
-{
-	struct s3c_hsotg_ep *ep = seq->private;
-	struct s3c_hsotg *hsotg = ep->parent;
-	struct s3c_hsotg_req *req;
-	void __iomem *regs = hsotg->regs;
-	int index = ep->index;
-	int show_limit = 15;
-	unsigned long flags;
-
-	seq_printf(seq, "Endpoint index %d, named %s,  dir %s:\n",
-		   ep->index, ep->ep.name, decode_direction(ep->dir_in));
-
-	/* first show the register state */
-
-	seq_printf(seq, "\tDIEPCTL=0x%08x, DOEPCTL=0x%08x\n",
-		   readl(regs + DIEPCTL(index)),
-		   readl(regs + DOEPCTL(index)));
-
-	seq_printf(seq, "\tDIEPDMA=0x%08x, DOEPDMA=0x%08x\n",
-		   readl(regs + DIEPDMA(index)),
-		   readl(regs + DOEPDMA(index)));
-
-	seq_printf(seq, "\tDIEPINT=0x%08x, DOEPINT=0x%08x\n",
-		   readl(regs + DIEPINT(index)),
-		   readl(regs + DOEPINT(index)));
-
-	seq_printf(seq, "\tDIEPTSIZ=0x%08x, DOEPTSIZ=0x%08x\n",
-		   readl(regs + DIEPTSIZ(index)),
-		   readl(regs + DOEPTSIZ(index)));
-
-	seq_puts(seq, "\n");
-	seq_printf(seq, "mps %d\n", ep->ep.maxpacket);
-	seq_printf(seq, "total_data=%ld\n", ep->total_data);
-
-	seq_printf(seq, "request list (%p,%p):\n",
-		   ep->queue.next, ep->queue.prev);
-
-	spin_lock_irqsave(&hsotg->lock, flags);
-
-	list_for_each_entry(req, &ep->queue, queue) {
-		if (--show_limit < 0) {
-			seq_puts(seq, "not showing more requests...\n");
-			break;
-		}
-
-		seq_printf(seq, "%c req %p: %d bytes @%p, ",
-			   req == ep->req ? '*' : ' ',
-			   req, req->req.length, req->req.buf);
-		seq_printf(seq, "%d done, res %d\n",
-			   req->req.actual, req->req.status);
-	}
-
-	spin_unlock_irqrestore(&hsotg->lock, flags);
-
-	return 0;
-}
-
-static int ep_open(struct inode *inode, struct file *file)
-{
-	return single_open(file, ep_show, inode->i_private);
-}
-
-static const struct file_operations ep_fops = {
-	.owner		= THIS_MODULE,
-	.open		= ep_open,
-	.read		= seq_read,
-	.llseek		= seq_lseek,
-	.release	= single_release,
-};
-
-/**
- * s3c_hsotg_create_debug - create debugfs directory and files
- * @hsotg: The driver state
- *
- * Create the debugfs files to allow the user to get information
- * about the state of the system. The directory name is created
- * with the same name as the device itself, in case we end up
- * with multiple blocks in future systems.
- */
-static void s3c_hsotg_create_debug(struct s3c_hsotg *hsotg)
-{
-	struct dentry *root;
-	unsigned epidx;
-
-	root = debugfs_create_dir(dev_name(hsotg->dev), NULL);
-	hsotg->debug_root = root;
-	if (IS_ERR(root)) {
-		dev_err(hsotg->dev, "cannot create debug root\n");
-		return;
-	}
-
-	/* create general state file */
-
-	hsotg->debug_file = debugfs_create_file("state", 0444, root,
-						hsotg, &state_fops);
-
-	if (IS_ERR(hsotg->debug_file))
-		dev_err(hsotg->dev, "%s: failed to create state\n", __func__);
-
-	hsotg->debug_fifo = debugfs_create_file("fifo", 0444, root,
-						hsotg, &fifo_fops);
-
-	if (IS_ERR(hsotg->debug_fifo))
-		dev_err(hsotg->dev, "%s: failed to create fifo\n", __func__);
-
-	/* create one file for each endpoint */
-
-	for (epidx = 0; epidx < hsotg->num_of_eps; epidx++) {
-		struct s3c_hsotg_ep *ep = &hsotg->eps[epidx];
-
-		ep->debugfs = debugfs_create_file(ep->name, 0444,
-						  root, ep, &ep_fops);
-
-		if (IS_ERR(ep->debugfs))
-			dev_err(hsotg->dev, "failed to create %s debug file\n",
-				ep->name);
-	}
-}
-
-/**
- * s3c_hsotg_delete_debug - cleanup debugfs entries
- * @hsotg: The driver state
- *
- * Cleanup (remove) the debugfs files for use on module exit.
- */
-static void s3c_hsotg_delete_debug(struct s3c_hsotg *hsotg)
-{
-	unsigned epidx;
-
-	for (epidx = 0; epidx < hsotg->num_of_eps; epidx++) {
-		struct s3c_hsotg_ep *ep = &hsotg->eps[epidx];
-		debugfs_remove(ep->debugfs);
-	}
-
-	debugfs_remove(hsotg->debug_file);
-	debugfs_remove(hsotg->debug_fifo);
-	debugfs_remove(hsotg->debug_root);
-}
-
-/**
- * s3c_hsotg_probe - probe function for hsotg driver
- * @pdev: The platform information for the driver
- */
-
-static int s3c_hsotg_probe(struct platform_device *pdev)
-{
-	struct s3c_hsotg_plat *plat = dev_get_platdata(&pdev->dev);
-	struct phy *phy;
-	struct usb_phy *uphy;
-	struct device *dev = &pdev->dev;
-	struct s3c_hsotg_ep *eps;
-	struct s3c_hsotg *hsotg;
-	struct resource *res;
-	int epnum;
-	int ret;
-	int i;
-
-	hsotg = devm_kzalloc(&pdev->dev, sizeof(struct s3c_hsotg), GFP_KERNEL);
-	if (!hsotg) {
-		dev_err(dev, "cannot get memory\n");
-		return -ENOMEM;
-	}
-
-	/*
-	 * Attempt to find a generic PHY, then look for an old style
-	 * USB PHY, finally fall back to pdata
-	 */
-	phy = devm_phy_get(&pdev->dev, "usb2-phy");
-	if (IS_ERR(phy)) {
-		uphy = devm_usb_get_phy(dev, USB_PHY_TYPE_USB2);
-		if (IS_ERR(uphy)) {
-			/* Fallback for pdata */
-			plat = dev_get_platdata(&pdev->dev);
-			if (!plat) {
-				dev_err(&pdev->dev,
-				"no platform data or transceiver defined\n");
-				return -EPROBE_DEFER;
-			}
-			hsotg->plat = plat;
-		} else
-			hsotg->uphy = uphy;
-	} else
-		hsotg->phy = phy;
-
-	hsotg->dev = dev;
-
-	hsotg->clk = devm_clk_get(&pdev->dev, "otg");
-	if (IS_ERR(hsotg->clk)) {
-		dev_err(dev, "cannot get otg clock\n");
-		return PTR_ERR(hsotg->clk);
-	}
-
-	platform_set_drvdata(pdev, hsotg);
-
-	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-
-	hsotg->regs = devm_ioremap_resource(&pdev->dev, res);
-	if (IS_ERR(hsotg->regs)) {
-		ret = PTR_ERR(hsotg->regs);
-		goto err_clk;
-	}
-
-	ret = platform_get_irq(pdev, 0);
-	if (ret < 0) {
-		dev_err(dev, "cannot find IRQ\n");
-		goto err_clk;
-	}
-
-	spin_lock_init(&hsotg->lock);
-
-	hsotg->irq = ret;
-
-	ret = devm_request_irq(&pdev->dev, hsotg->irq, s3c_hsotg_irq, 0,
-				dev_name(dev), hsotg);
-	if (ret < 0) {
-		dev_err(dev, "cannot claim IRQ\n");
-		goto err_clk;
-	}
-
-	dev_info(dev, "regs %p, irq %d\n", hsotg->regs, hsotg->irq);
-
-	hsotg->gadget.max_speed = USB_SPEED_HIGH;
-	hsotg->gadget.ops = &s3c_hsotg_gadget_ops;
-	hsotg->gadget.name = dev_name(dev);
-
-	/* reset the system */
-
-	clk_prepare_enable(hsotg->clk);
-
-	/* regulators */
-
-	for (i = 0; i < ARRAY_SIZE(hsotg->supplies); i++)
-		hsotg->supplies[i].supply = s3c_hsotg_supply_names[i];
-
-	ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(hsotg->supplies),
-				 hsotg->supplies);
-	if (ret) {
-		dev_err(dev, "failed to request supplies: %d\n", ret);
-		goto err_clk;
-	}
-
-	ret = regulator_bulk_enable(ARRAY_SIZE(hsotg->supplies),
-				    hsotg->supplies);
-
-	if (ret) {
-		dev_err(hsotg->dev, "failed to enable supplies: %d\n", ret);
-		goto err_supplies;
-	}
-
-	/* Set default UTMI width */
-	hsotg->phyif = GUSBCFG_PHYIf16;
-
-	/*
-	 * If using the generic PHY framework, check if the PHY bus
-	 * width is 8-bit and set the phyif appropriately.
-	 */
-	if (hsotg->phy && (phy_get_bus_width(phy) == 8))
-		hsotg->phyif = GUSBCFG_PHYIf8;
-
-	if (hsotg->phy)
-		phy_init(hsotg->phy);
-
-	/* usb phy enable */
-	s3c_hsotg_phy_enable(hsotg);
-
-	s3c_hsotg_corereset(hsotg);
-	s3c_hsotg_init(hsotg);
-	s3c_hsotg_hw_cfg(hsotg);
-
-	/* hsotg->num_of_eps holds number of EPs other than ep0 */
-
-	if (hsotg->num_of_eps == 0) {
-		dev_err(dev, "wrong number of EPs (zero)\n");
-		ret = -EINVAL;
-		goto err_supplies;
-	}
-
-	eps = kcalloc(hsotg->num_of_eps + 1, sizeof(struct s3c_hsotg_ep),
-		      GFP_KERNEL);
-	if (!eps) {
-		dev_err(dev, "cannot get memory\n");
-		ret = -ENOMEM;
-		goto err_supplies;
-	}
-
-	hsotg->eps = eps;
-
-	/* setup endpoint information */
-
-	INIT_LIST_HEAD(&hsotg->gadget.ep_list);
-	hsotg->gadget.ep0 = &hsotg->eps[0].ep;
-
-	/* allocate EP0 request */
-
-	hsotg->ctrl_req = s3c_hsotg_ep_alloc_request(&hsotg->eps[0].ep,
-						     GFP_KERNEL);
-	if (!hsotg->ctrl_req) {
-		dev_err(dev, "failed to allocate ctrl req\n");
-		ret = -ENOMEM;
-		goto err_ep_mem;
-	}
-
-	/* initialise the endpoints now the core has been initialised */
-	for (epnum = 0; epnum < hsotg->num_of_eps; epnum++)
-		s3c_hsotg_initep(hsotg, &hsotg->eps[epnum], epnum);
-
-	/* disable power and clock */
-
-	ret = regulator_bulk_disable(ARRAY_SIZE(hsotg->supplies),
-				    hsotg->supplies);
-	if (ret) {
-		dev_err(hsotg->dev, "failed to disable supplies: %d\n", ret);
-		goto err_ep_mem;
-	}
-
-	s3c_hsotg_phy_disable(hsotg);
-
-	ret = usb_add_gadget_udc(&pdev->dev, &hsotg->gadget);
-	if (ret)
-		goto err_ep_mem;
-
-	s3c_hsotg_create_debug(hsotg);
-
-	s3c_hsotg_dump(hsotg);
-
-	return 0;
-
-err_ep_mem:
-	kfree(eps);
-err_supplies:
-	s3c_hsotg_phy_disable(hsotg);
-err_clk:
-	clk_disable_unprepare(hsotg->clk);
-
-	return ret;
-}
-
-/**
- * s3c_hsotg_remove - remove function for hsotg driver
- * @pdev: The platform information for the driver
- */
-static int s3c_hsotg_remove(struct platform_device *pdev)
-{
-	struct s3c_hsotg *hsotg = platform_get_drvdata(pdev);
-
-	usb_del_gadget_udc(&hsotg->gadget);
-
-	s3c_hsotg_delete_debug(hsotg);
-
-	if (hsotg->driver) {
-		/* should have been done already by driver model core */
-		usb_gadget_unregister_driver(hsotg->driver);
-	}
-
-	s3c_hsotg_phy_disable(hsotg);
-	if (hsotg->phy)
-		phy_exit(hsotg->phy);
-	clk_disable_unprepare(hsotg->clk);
-
-	return 0;
-}
-
-static int s3c_hsotg_suspend(struct platform_device *pdev, pm_message_t state)
-{
-	struct s3c_hsotg *hsotg = platform_get_drvdata(pdev);
-	unsigned long flags;
-	int ret = 0;
-
-	if (hsotg->driver)
-		dev_info(hsotg->dev, "suspending usb gadget %s\n",
-			 hsotg->driver->driver.name);
-
-	spin_lock_irqsave(&hsotg->lock, flags);
-	s3c_hsotg_disconnect(hsotg);
-	s3c_hsotg_phy_disable(hsotg);
-	hsotg->gadget.speed = USB_SPEED_UNKNOWN;
-	spin_unlock_irqrestore(&hsotg->lock, flags);
-
-	if (hsotg->driver) {
-		int ep;
-		for (ep = 0; ep < hsotg->num_of_eps; ep++)
-			s3c_hsotg_ep_disable(&hsotg->eps[ep].ep);
-
-		ret = regulator_bulk_disable(ARRAY_SIZE(hsotg->supplies),
-					     hsotg->supplies);
-	}
-
-	return ret;
-}
-
-static int s3c_hsotg_resume(struct platform_device *pdev)
-{
-	struct s3c_hsotg *hsotg = platform_get_drvdata(pdev);
-	unsigned long flags;
-	int ret = 0;
-
-	if (hsotg->driver) {
-		dev_info(hsotg->dev, "resuming usb gadget %s\n",
-			 hsotg->driver->driver.name);
-		ret = regulator_bulk_enable(ARRAY_SIZE(hsotg->supplies),
-				      hsotg->supplies);
-	}
-
-	spin_lock_irqsave(&hsotg->lock, flags);
-	hsotg->last_rst = jiffies;
-	s3c_hsotg_phy_enable(hsotg);
-	s3c_hsotg_core_init(hsotg);
-	spin_unlock_irqrestore(&hsotg->lock, flags);
-
-	return ret;
-}
-
-#ifdef CONFIG_OF
-static const struct of_device_id s3c_hsotg_of_ids[] = {
-	{ .compatible = "samsung,s3c6400-hsotg", },
-	{ .compatible = "snps,dwc2", },
-	{ /* sentinel */ }
-};
-MODULE_DEVICE_TABLE(of, s3c_hsotg_of_ids);
-#endif
-
-static struct platform_driver s3c_hsotg_driver = {
-	.driver		= {
-		.name	= "s3c-hsotg",
-		.owner	= THIS_MODULE,
-		.of_match_table = of_match_ptr(s3c_hsotg_of_ids),
-	},
-	.probe		= s3c_hsotg_probe,
-	.remove		= s3c_hsotg_remove,
-	.suspend	= s3c_hsotg_suspend,
-	.resume		= s3c_hsotg_resume,
-};
-
-module_platform_driver(s3c_hsotg_driver);
-
-MODULE_DESCRIPTION("Samsung S3C USB High-speed/OtG device");
-MODULE_AUTHOR("Ben Dooks <ben@simtec.co.uk>");
-MODULE_LICENSE("GPL");
-MODULE_ALIAS("platform:s3c-hsotg");