text: /*
   * Fusb300 UDC (USB gadget)
   *
   * Copyright (C) 2010 Faraday Technology Corp.
   *
   * Author : Yuan-hsin Chen <yhchen@faraday-tech.com>
   *
   * This program is free software; you can redistribute it and/or modify
   * it under the terms of the GNU General Public License as published by
   * the Free Software Foundation; version 2 of the License.
   */
  #include <linux/dma-mapping.h>
  #include <linux/err.h>
  #include <linux/interrupt.h>
  #include <linux/io.h>
  #include <linux/module.h>
  #include <linux/platform_device.h>
  #include <linux/usb/ch9.h>
  #include <linux/usb/gadget.h>
  
  #include "fusb300_udc.h"
  
  MODULE_DESCRIPTION("FUSB300  USB gadget driver");
  MODULE_LICENSE("GPL");
  MODULE_AUTHOR("Yuan Hsin Chen <yhchen@faraday-tech.com>");
  MODULE_ALIAS("platform:fusb300_udc");
  
  #define DRIVER_VERSION	"20 October 2010"
  
  static const char udc_name[] = "fusb300_udc";
  static const char * const fusb300_ep_name[] = {
  	"ep0", "ep1", "ep2", "ep3", "ep4", "ep5", "ep6", "ep7", "ep8", "ep9",
  	"ep10", "ep11", "ep12", "ep13", "ep14", "ep15"
  };
  
  static void done(struct fusb300_ep *ep, struct fusb300_request *req,
  		 int status);
  
  static void fusb300_enable_bit(struct fusb300 *fusb300, u32 offset,
  			       u32 value)
  {
  	u32 reg = ioread32(fusb300->reg + offset);
  
  	reg |= value;
  	iowrite32(reg, fusb300->reg + offset);
  }
  
  static void fusb300_disable_bit(struct fusb300 *fusb300, u32 offset,
  				u32 value)
  {
  	u32 reg = ioread32(fusb300->reg + offset);
  
  	reg &= ~value;
  	iowrite32(reg, fusb300->reg + offset);
  }
  
  
  static void fusb300_ep_setting(struct fusb300_ep *ep,
  			       struct fusb300_ep_info info)
  {
  	ep->epnum = info.epnum;
  	ep->type = info.type;
  }
  
  static int fusb300_ep_release(struct fusb300_ep *ep)
  {
  	if (!ep->epnum)
  		return 0;
  	ep->epnum = 0;
  	ep->stall = 0;
  	ep->wedged = 0;
  	return 0;
  }
  
  static void fusb300_set_fifo_entry(struct fusb300 *fusb300,
  				   u32 ep)
  {
  	u32 val = ioread32(fusb300->reg + FUSB300_OFFSET_EPSET1(ep));
  
  	val &= ~FUSB300_EPSET1_FIFOENTRY_MSK;
  	val |= FUSB300_EPSET1_FIFOENTRY(FUSB300_FIFO_ENTRY_NUM);
  	iowrite32(val, fusb300->reg + FUSB300_OFFSET_EPSET1(ep));
  }
  
  static void fusb300_set_start_entry(struct fusb300 *fusb300,
  				    u8 ep)
  {
  	u32 reg = ioread32(fusb300->reg + FUSB300_OFFSET_EPSET1(ep));
  	u32 start_entry = fusb300->fifo_entry_num * FUSB300_FIFO_ENTRY_NUM;
  
  	reg &= ~FUSB300_EPSET1_START_ENTRY_MSK	;
  	reg |= FUSB300_EPSET1_START_ENTRY(start_entry);
  	iowrite32(reg, fusb300->reg + FUSB300_OFFSET_EPSET1(ep));
  	if (fusb300->fifo_entry_num == FUSB300_MAX_FIFO_ENTRY) {
  		fusb300->fifo_entry_num = 0;
  		fusb300->addrofs = 0;
  		pr_err("fifo entry is over the maximum number!\n");
  	} else
  		fusb300->fifo_entry_num++;
  }
  
  /* set fusb300_set_start_entry first before fusb300_set_epaddrofs */
  static void fusb300_set_epaddrofs(struct fusb300 *fusb300,
  				  struct fusb300_ep_info info)
  {
  	u32 reg = ioread32(fusb300->reg + FUSB300_OFFSET_EPSET2(info.epnum));
  
  	reg &= ~FUSB300_EPSET2_ADDROFS_MSK;
  	reg |= FUSB300_EPSET2_ADDROFS(fusb300->addrofs);
  	iowrite32(reg, fusb300->reg + FUSB300_OFFSET_EPSET2(info.epnum));
  	fusb300->addrofs += (info.maxpacket + 7) / 8 * FUSB300_FIFO_ENTRY_NUM;
  }
  
  static void ep_fifo_setting(struct fusb300 *fusb300,
  			    struct fusb300_ep_info info)
  {
  	fusb300_set_fifo_entry(fusb300, info.epnum);
  	fusb300_set_start_entry(fusb300, info.epnum);
  	fusb300_set_epaddrofs(fusb300, info);
  }
  
  static void fusb300_set_eptype(struct fusb300 *fusb300,
  			       struct fusb300_ep_info info)
  {
  	u32 reg = ioread32(fusb300->reg + FUSB300_OFFSET_EPSET1(info.epnum));
  
  	reg &= ~FUSB300_EPSET1_TYPE_MSK;
  	reg |= FUSB300_EPSET1_TYPE(info.type);
  	iowrite32(reg, fusb300->reg + FUSB300_OFFSET_EPSET1(info.epnum));
  }
  
  static void fusb300_set_epdir(struct fusb300 *fusb300,
  			      struct fusb300_ep_info info)
  {
  	u32 reg;
  
  	if (!info.dir_in)
  		return;
  	reg = ioread32(fusb300->reg + FUSB300_OFFSET_EPSET1(info.epnum));
  	reg &= ~FUSB300_EPSET1_DIR_MSK;
  	reg |= FUSB300_EPSET1_DIRIN;
  	iowrite32(reg, fusb300->reg + FUSB300_OFFSET_EPSET1(info.epnum));
  }
  
  static void fusb300_set_ep_active(struct fusb300 *fusb300,
  			  u8 ep)
  {
  	u32 reg = ioread32(fusb300->reg + FUSB300_OFFSET_EPSET1(ep));
  
  	reg |= FUSB300_EPSET1_ACTEN;
  	iowrite32(reg, fusb300->reg + FUSB300_OFFSET_EPSET1(ep));
  }
  
  static void fusb300_set_epmps(struct fusb300 *fusb300,
  			      struct fusb300_ep_info info)
  {
  	u32 reg = ioread32(fusb300->reg + FUSB300_OFFSET_EPSET2(info.epnum));
  
  	reg &= ~FUSB300_EPSET2_MPS_MSK;
  	reg |= FUSB300_EPSET2_MPS(info.maxpacket);
  	iowrite32(reg, fusb300->reg + FUSB300_OFFSET_EPSET2(info.epnum));
  }
  
  static void fusb300_set_interval(struct fusb300 *fusb300,
  				 struct fusb300_ep_info info)
  {
  	u32 reg = ioread32(fusb300->reg + FUSB300_OFFSET_EPSET1(info.epnum));
  
  	reg &= ~FUSB300_EPSET1_INTERVAL(0x7);
  	reg |= FUSB300_EPSET1_INTERVAL(info.interval);
  	iowrite32(reg, fusb300->reg + FUSB300_OFFSET_EPSET1(info.epnum));
  }
  
  static void fusb300_set_bwnum(struct fusb300 *fusb300,
  			      struct fusb300_ep_info info)
  {
  	u32 reg = ioread32(fusb300->reg + FUSB300_OFFSET_EPSET1(info.epnum));
  
  	reg &= ~FUSB300_EPSET1_BWNUM(0x3);
  	reg |= FUSB300_EPSET1_BWNUM(info.bw_num);
  	iowrite32(reg, fusb300->reg + FUSB300_OFFSET_EPSET1(info.epnum));
  }
  
  static void set_ep_reg(struct fusb300 *fusb300,
  		      struct fusb300_ep_info info)
  {
  	fusb300_set_eptype(fusb300, info);
  	fusb300_set_epdir(fusb300, info);
  	fusb300_set_epmps(fusb300, info);
  
  	if (info.interval)
  		fusb300_set_interval(fusb300, info);
  
  	if (info.bw_num)
  		fusb300_set_bwnum(fusb300, info);
  
  	fusb300_set_ep_active(fusb300, info.epnum);
  }
  
  static int config_ep(struct fusb300_ep *ep,
  		     const struct usb_endpoint_descriptor *desc)
  {
  	struct fusb300 *fusb300 = ep->fusb300;
  	struct fusb300_ep_info info;
  
  	ep->ep.desc = desc;
  
  	info.interval = 0;
  	info.addrofs = 0;
  	info.bw_num = 0;
  
  	info.type = desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK;
  	info.dir_in = (desc->bEndpointAddress & USB_ENDPOINT_DIR_MASK) ? 1 : 0;
  	info.maxpacket = usb_endpoint_maxp(desc);
  	info.epnum = desc->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK;
  
  	if ((info.type == USB_ENDPOINT_XFER_INT) ||
  	   (info.type == USB_ENDPOINT_XFER_ISOC)) {
  		info.interval = desc->bInterval;
  		if (info.type == USB_ENDPOINT_XFER_ISOC)
  			info.bw_num = ((desc->wMaxPacketSize & 0x1800) >> 11);
  	}
  
  	ep_fifo_setting(fusb300, info);
  
  	set_ep_reg(fusb300, info);
  
  	fusb300_ep_setting(ep, info);
  
  	fusb300->ep[info.epnum] = ep;
  
  	return 0;
  }
  
  static int fusb300_enable(struct usb_ep *_ep,
  			  const struct usb_endpoint_descriptor *desc)
  {
  	struct fusb300_ep *ep;
  
  	ep = container_of(_ep, struct fusb300_ep, ep);
  
  	if (ep->fusb300->reenum) {
  		ep->fusb300->fifo_entry_num = 0;
  		ep->fusb300->addrofs = 0;
  		ep->fusb300->reenum = 0;
  	}
  
  	return config_ep(ep, desc);
  }
  
  static int fusb300_disable(struct usb_ep *_ep)
  {
  	struct fusb300_ep *ep;
  	struct fusb300_request *req;
  	unsigned long flags;
  
  	ep = container_of(_ep, struct fusb300_ep, ep);
  
  	BUG_ON(!ep);
  
  	while (!list_empty(&ep->queue)) {
  		req = list_entry(ep->queue.next, struct fusb300_request, queue);
  		spin_lock_irqsave(&ep->fusb300->lock, flags);
  		done(ep, req, -ECONNRESET);
  		spin_unlock_irqrestore(&ep->fusb300->lock, flags);
  	}
  
  	return fusb300_ep_release(ep);
  }
  
  static struct usb_request *fusb300_alloc_request(struct usb_ep *_ep,
  						gfp_t gfp_flags)
  {
  	struct fusb300_request *req;
  
  	req = kzalloc(sizeof(struct fusb300_request), gfp_flags);
  	if (!req)
  		return NULL;
  	INIT_LIST_HEAD(&req->queue);
  
  	return &req->req;
  }
  
  static void fusb300_free_request(struct usb_ep *_ep, struct usb_request *_req)
  {
  	struct fusb300_request *req;
  
  	req = container_of(_req, struct fusb300_request, req);
  	kfree(req);
  }
  
  static int enable_fifo_int(struct fusb300_ep *ep)
  {
  	struct fusb300 *fusb300 = ep->fusb300;
  
  	if (ep->epnum) {
  		fusb300_enable_bit(fusb300, FUSB300_OFFSET_IGER0,
  			FUSB300_IGER0_EEPn_FIFO_INT(ep->epnum));
  	} else {
  		pr_err("can't enable_fifo_int ep0\n");
  		return -EINVAL;
  	}
  
  	return 0;
  }
  
  static int disable_fifo_int(struct fusb300_ep *ep)
  {
  	struct fusb300 *fusb300 = ep->fusb300;
  
  	if (ep->epnum) {
  		fusb300_disable_bit(fusb300, FUSB300_OFFSET_IGER0,
  			FUSB300_IGER0_EEPn_FIFO_INT(ep->epnum));
  	} else {
  		pr_err("can't disable_fifo_int ep0\n");
  		return -EINVAL;
  	}
  
  	return 0;
  }
  
  static void fusb300_set_cxlen(struct fusb300 *fusb300, u32 length)
  {
  	u32 reg;
  
  	reg = ioread32(fusb300->reg + FUSB300_OFFSET_CSR);
  	reg &= ~FUSB300_CSR_LEN_MSK;
  	reg |= FUSB300_CSR_LEN(length);
  	iowrite32(reg, fusb300->reg + FUSB300_OFFSET_CSR);
  }
  
  /* write data to cx fifo */
  static void fusb300_wrcxf(struct fusb300_ep *ep,
  		   struct fusb300_request *req)
  {
  	int i = 0;
  	u8 *tmp;
  	u32 data;
  	struct fusb300 *fusb300 = ep->fusb300;
  	u32 length = req->req.length - req->req.actual;
  
  	tmp = req->req.buf + req->req.actual;
  
  	if (length > SS_CTL_MAX_PACKET_SIZE) {
  		fusb300_set_cxlen(fusb300, SS_CTL_MAX_PACKET_SIZE);
  		for (i = (SS_CTL_MAX_PACKET_SIZE >> 2); i > 0; i--) {
  			data = *tmp | *(tmp + 1) << 8 | *(tmp + 2) << 16 |
  				*(tmp + 3) << 24;
  			iowrite32(data, fusb300->reg + FUSB300_OFFSET_CXPORT);
  			tmp += 4;
  		}
  		req->req.actual += SS_CTL_MAX_PACKET_SIZE;
  	} else { /* length is less than max packet size */
  		fusb300_set_cxlen(fusb300, length);
  		for (i = length >> 2; i > 0; i--) {
  			data = *tmp | *(tmp + 1) << 8 | *(tmp + 2) << 16 |
  				*(tmp + 3) << 24;
  			printk(KERN_DEBUG "    0x%x\n", data);
  			iowrite32(data, fusb300->reg + FUSB300_OFFSET_CXPORT);
  			tmp = tmp + 4;
  		}
  		switch (length % 4) {
  		case 1:
  			data = *tmp;
  			printk(KERN_DEBUG "    0x%x\n", data);
  			iowrite32(data, fusb300->reg + FUSB300_OFFSET_CXPORT);
  			break;
  		case 2:
  			data = *tmp | *(tmp + 1) << 8;
  			printk(KERN_DEBUG "    0x%x\n", data);
  			iowrite32(data, fusb300->reg + FUSB300_OFFSET_CXPORT);
  			break;
  		case 3:
  			data = *tmp | *(tmp + 1) << 8 | *(tmp + 2) << 16;
  			printk(KERN_DEBUG "    0x%x\n", data);
  			iowrite32(data, fusb300->reg + FUSB300_OFFSET_CXPORT);
  			break;
  		default:
  			break;
  		}
  		req->req.actual += length;
  	}
  }
  
  static void fusb300_set_epnstall(struct fusb300 *fusb300, u8 ep)
  {
  	fusb300_enable_bit(fusb300, FUSB300_OFFSET_EPSET0(ep),
  		FUSB300_EPSET0_STL);
  }
  
  static void fusb300_clear_epnstall(struct fusb300 *fusb300, u8 ep)
  {
  	u32 reg = ioread32(fusb300->reg + FUSB300_OFFSET_EPSET0(ep));
  
  	if (reg & FUSB300_EPSET0_STL) {
  		printk(KERN_DEBUG "EP%d stall... Clear!!\n", ep);
  		reg &= ~FUSB300_EPSET0_STL;
  		iowrite32(reg, fusb300->reg + FUSB300_OFFSET_EPSET0(ep));
  	}
  }
  
  static void ep0_queue(struct fusb300_ep *ep, struct fusb300_request *req)
  {
  	if (ep->fusb300->ep0_dir) { /* if IN */
  		if (req->req.length) {
  			fusb300_wrcxf(ep, req);
  		} else
  			printk(KERN_DEBUG "%s : req->req.length = 0x%x\n",
  				__func__, req->req.length);
  		if ((req->req.length == req->req.actual) ||
  		    (req->req.actual < ep->ep.maxpacket))
  			done(ep, req, 0);
  	} else { /* OUT */
  		if (!req->req.length)
  			done(ep, req, 0);
  		else
  			fusb300_enable_bit(ep->fusb300, FUSB300_OFFSET_IGER1,
  				FUSB300_IGER1_CX_OUT_INT);
  	}
  }
  
  static int fusb300_queue(struct usb_ep *_ep, struct usb_request *_req,
  			 gfp_t gfp_flags)
  {
  	struct fusb300_ep *ep;
  	struct fusb300_request *req;
  	unsigned long flags;
  	int request  = 0;
  
  	ep = container_of(_ep, struct fusb300_ep, ep);
  	req = container_of(_req, struct fusb300_request, req);
  
  	if (ep->fusb300->gadget.speed == USB_SPEED_UNKNOWN)
  		return -ESHUTDOWN;
  
  	spin_lock_irqsave(&ep->fusb300->lock, flags);
  
  	if (list_empty(&ep->queue))
  		request = 1;
  
  	list_add_tail(&req->queue, &ep->queue);
  
  	req->req.actual = 0;
  	req->req.status = -EINPROGRESS;
  
  	if (ep->ep.desc == NULL) /* ep0 */
  		ep0_queue(ep, req);
  	else if (request && !ep->stall)
  		enable_fifo_int(ep);
  
  	spin_unlock_irqrestore(&ep->fusb300->lock, flags);
  
  	return 0;
  }
  
  static int fusb300_dequeue(struct usb_ep *_ep, struct usb_request *_req)
  {
  	struct fusb300_ep *ep;
  	struct fusb300_request *req;
  	unsigned long flags;
  
  	ep = container_of(_ep, struct fusb300_ep, ep);
  	req = container_of(_req, struct fusb300_request, req);
  
  	spin_lock_irqsave(&ep->fusb300->lock, flags);
  	if (!list_empty(&ep->queue))
  		done(ep, req, -ECONNRESET);
  	spin_unlock_irqrestore(&ep->fusb300->lock, flags);
  
  	return 0;
  }
  
  static int fusb300_set_halt_and_wedge(struct usb_ep *_ep, int value, int wedge)
  {
  	struct fusb300_ep *ep;
  	struct fusb300 *fusb300;
  	unsigned long flags;
  	int ret = 0;
  
  	ep = container_of(_ep, struct fusb300_ep, ep);
  
  	fusb300 = ep->fusb300;
  
  	spin_lock_irqsave(&ep->fusb300->lock, flags);
  
  	if (!list_empty(&ep->queue)) {
  		ret = -EAGAIN;
  		goto out;
  	}
  
  	if (value) {
  		fusb300_set_epnstall(fusb300, ep->epnum);
  		ep->stall = 1;
  		if (wedge)
  			ep->wedged = 1;
  	} else {
  		fusb300_clear_epnstall(fusb300, ep->epnum);
  		ep->stall = 0;
  		ep->wedged = 0;
  	}
  
  out:
  	spin_unlock_irqrestore(&ep->fusb300->lock, flags);
  	return ret;
  }
  
  static int fusb300_set_halt(struct usb_ep *_ep, int value)
  {
  	return fusb300_set_halt_and_wedge(_ep, value, 0);
  }
  
  static int fusb300_set_wedge(struct usb_ep *_ep)
  {
  	return fusb300_set_halt_and_wedge(_ep, 1, 1);
  }
  
  static void fusb300_fifo_flush(struct usb_ep *_ep)
  {
  }
  
  static struct usb_ep_ops fusb300_ep_ops = {
  	.enable		= fusb300_enable,
  	.disable	= fusb300_disable,
  
  	.alloc_request	= fusb300_alloc_request,
  	.free_request	= fusb300_free_request,
  
  	.queue		= fusb300_queue,
  	.dequeue	= fusb300_dequeue,
  
  	.set_halt	= fusb300_set_halt,
  	.fifo_flush	= fusb300_fifo_flush,
  	.set_wedge	= fusb300_set_wedge,
  };
  
  /*****************************************************************************/
  static void fusb300_clear_int(struct fusb300 *fusb300, u32 offset,
  		       u32 value)
  {
  	iowrite32(value, fusb300->reg + offset);
  }
  
  static void fusb300_reset(void)
  {
  }
  
  static void fusb300_set_cxstall(struct fusb300 *fusb300)
  {
  	fusb300_enable_bit(fusb300, FUSB300_OFFSET_CSR,
  			   FUSB300_CSR_STL);
  }
  
  static void fusb300_set_cxdone(struct fusb300 *fusb300)
  {
  	fusb300_enable_bit(fusb300, FUSB300_OFFSET_CSR,
  			   FUSB300_CSR_DONE);
  }
  
  /* read data from cx fifo */
  void fusb300_rdcxf(struct fusb300 *fusb300,
  		   u8 *buffer, u32 length)
  {
  	int i = 0;
  	u8 *tmp;
  	u32 data;
  
  	tmp = buffer;
  
  	for (i = (length >> 2); i > 0; i--) {
  		data = ioread32(fusb300->reg + FUSB300_OFFSET_CXPORT);
  		printk(KERN_DEBUG "    0x%x\n", data);
  		*tmp = data & 0xFF;
  		*(tmp + 1) = (data >> 8) & 0xFF;
  		*(tmp + 2) = (data >> 16) & 0xFF;
  		*(tmp + 3) = (data >> 24) & 0xFF;
  		tmp = tmp + 4;
  	}
  
  	switch (length % 4) {
  	case 1:
  		data = ioread32(fusb300->reg + FUSB300_OFFSET_CXPORT);
  		printk(KERN_DEBUG "    0x%x\n", data);
  		*tmp = data & 0xFF;
  		break;
  	case 2:
  		data = ioread32(fusb300->reg + FUSB300_OFFSET_CXPORT);
  		printk(KERN_DEBUG "    0x%x\n", data);
  		*tmp = data & 0xFF;
  		*(tmp + 1) = (data >> 8) & 0xFF;
  		break;
  	case 3:
  		data = ioread32(fusb300->reg + FUSB300_OFFSET_CXPORT);
  		printk(KERN_DEBUG "    0x%x\n", data);
  		*tmp = data & 0xFF;
  		*(tmp + 1) = (data >> 8) & 0xFF;
  		*(tmp + 2) = (data >> 16) & 0xFF;
  		break;
  	default:
  		break;
  	}
  }
  
  static void fusb300_rdfifo(struct fusb300_ep *ep,
  			  struct fusb300_request *req,
  			  u32 length)
  {
  	int i = 0;
  	u8 *tmp;
  	u32 data, reg;
  	struct fusb300 *fusb300 = ep->fusb300;
  
  	tmp = req->req.buf + req->req.actual;
  	req->req.actual += length;
  
  	if (req->req.actual > req->req.length)
  		printk(KERN_DEBUG "req->req.actual > req->req.length\n");
  
  	for (i = (length >> 2); i > 0; i--) {
  		data = ioread32(fusb300->reg +
  			FUSB300_OFFSET_EPPORT(ep->epnum));
  		*tmp = data & 0xFF;
  		*(tmp + 1) = (data >> 8) & 0xFF;
  		*(tmp + 2) = (data >> 16) & 0xFF;
  		*(tmp + 3) = (data >> 24) & 0xFF;
  		tmp = tmp + 4;
  	}
  
  	switch (length % 4) {
  	case 1:
  		data = ioread32(fusb300->reg +
  			FUSB300_OFFSET_EPPORT(ep->epnum));
  		*tmp = data & 0xFF;
  		break;
  	case 2:
  		data = ioread32(fusb300->reg +
  			FUSB300_OFFSET_EPPORT(ep->epnum));
  		*tmp = data & 0xFF;
  		*(tmp + 1) = (data >> 8) & 0xFF;
  		break;
  	case 3:
  		data = ioread32(fusb300->reg +
  			FUSB300_OFFSET_EPPORT(ep->epnum));
  		*tmp = data & 0xFF;
  		*(tmp + 1) = (data >> 8) & 0xFF;
  		*(tmp + 2) = (data >> 16) & 0xFF;
  		break;
  	default:
  		break;
  	}
  
  	do {
  		reg = ioread32(fusb300->reg + FUSB300_OFFSET_IGR1);
  		reg &= FUSB300_IGR1_SYNF0_EMPTY_INT;
  		if (i)
  			printk(KERN_INFO "sync fifo is not empty!\n");
  		i++;
  	} while (!reg);
  }
  
  static u8 fusb300_get_epnstall(struct fusb300 *fusb300, u8 ep)
  {
  	u8 value;
  	u32 reg = ioread32(fusb300->reg + FUSB300_OFFSET_EPSET0(ep));
  
  	value = reg & FUSB300_EPSET0_STL;
  
  	return value;
  }
  
  static u8 fusb300_get_cxstall(struct fusb300 *fusb300)
  {
  	u8 value;
  	u32 reg = ioread32(fusb300->reg + FUSB300_OFFSET_CSR);
  
  	value = (reg & FUSB300_CSR_STL) >> 1;
  
  	return value;
  }
  
  static void request_error(struct fusb300 *fusb300)
  {
  	fusb300_set_cxstall(fusb300);
  	printk(KERN_DEBUG "request error!!\n");
  }
  
  static void get_status(struct fusb300 *fusb300, struct usb_ctrlrequest *ctrl)
  __releases(fusb300->lock)
  __acquires(fusb300->lock)
  {
  	u8 ep;
  	u16 status = 0;
  	u16 w_index = ctrl->wIndex;
  
  	switch (ctrl->bRequestType & USB_RECIP_MASK) {
  	case USB_RECIP_DEVICE:
  		status = 1 << USB_DEVICE_SELF_POWERED;
  		break;
  	case USB_RECIP_INTERFACE:
  		status = 0;
  		break;
  	case USB_RECIP_ENDPOINT:
  		ep = w_index & USB_ENDPOINT_NUMBER_MASK;
  		if (ep) {
  			if (fusb300_get_epnstall(fusb300, ep))
  				status = 1 << USB_ENDPOINT_HALT;
  		} else {
  			if (fusb300_get_cxstall(fusb300))
  				status = 0;
  		}
  		break;
  
  	default:
  		request_error(fusb300);
  		return;		/* exit */
  	}
  
  	fusb300->ep0_data = cpu_to_le16(status);
  	fusb300->ep0_req->buf = &fusb300->ep0_data;
  	fusb300->ep0_req->length = 2;
  
  	spin_unlock(&fusb300->lock);
  	fusb300_queue(fusb300->gadget.ep0, fusb300->ep0_req, GFP_KERNEL);
  	spin_lock(&fusb300->lock);
  }
  
  static void set_feature(struct fusb300 *fusb300, struct usb_ctrlrequest *ctrl)
  {
  	u8 ep;
  
  	switch (ctrl->bRequestType & USB_RECIP_MASK) {
  	case USB_RECIP_DEVICE:
  		fusb300_set_cxdone(fusb300);
  		break;
  	case USB_RECIP_INTERFACE:
  		fusb300_set_cxdone(fusb300);
  		break;
  	case USB_RECIP_ENDPOINT: {
  		u16 w_index = le16_to_cpu(ctrl->wIndex);
  
  		ep = w_index & USB_ENDPOINT_NUMBER_MASK;
  		if (ep)
  			fusb300_set_epnstall(fusb300, ep);
  		else
  			fusb300_set_cxstall(fusb300);
  		fusb300_set_cxdone(fusb300);
  		}
  		break;
  	default:
  		request_error(fusb300);
  		break;
  	}
  }
  
  static void fusb300_clear_seqnum(struct fusb300 *fusb300, u8 ep)
  {
  	fusb300_enable_bit(fusb300, FUSB300_OFFSET_EPSET0(ep),
  			    FUSB300_EPSET0_CLRSEQNUM);
  }
  
  static void clear_feature(struct fusb300 *fusb300, struct usb_ctrlrequest *ctrl)
  {
  	struct fusb300_ep *ep =
  		fusb300->ep[ctrl->wIndex & USB_ENDPOINT_NUMBER_MASK];
  
  	switch (ctrl->bRequestType & USB_RECIP_MASK) {
  	case USB_RECIP_DEVICE:
  		fusb300_set_cxdone(fusb300);
  		break;
  	case USB_RECIP_INTERFACE:
  		fusb300_set_cxdone(fusb300);
  		break;
  	case USB_RECIP_ENDPOINT:
  		if (ctrl->wIndex & USB_ENDPOINT_NUMBER_MASK) {
  			if (ep->wedged) {
  				fusb300_set_cxdone(fusb300);
  				break;
  			}
  			if (ep->stall) {
  				ep->stall = 0;
  				fusb300_clear_seqnum(fusb300, ep->epnum);
  				fusb300_clear_epnstall(fusb300, ep->epnum);
  				if (!list_empty(&ep->queue))
  					enable_fifo_int(ep);
  			}
  		}
  		fusb300_set_cxdone(fusb300);
  		break;
  	default:
  		request_error(fusb300);
  		break;
  	}
  }
  
  static void fusb300_set_dev_addr(struct fusb300 *fusb300, u16 addr)
  {
  	u32 reg = ioread32(fusb300->reg + FUSB300_OFFSET_DAR);
  
  	reg &= ~FUSB300_DAR_DRVADDR_MSK;
  	reg |= FUSB300_DAR_DRVADDR(addr);
  
  	iowrite32(reg, fusb300->reg + FUSB300_OFFSET_DAR);
  }
  
  static void set_address(struct fusb300 *fusb300, struct usb_ctrlrequest *ctrl)
  {
  	if (ctrl->wValue >= 0x0100)
  		request_error(fusb300);
  	else {
  		fusb300_set_dev_addr(fusb300, ctrl->wValue);
  		fusb300_set_cxdone(fusb300);
  	}
  }
  
  #define UVC_COPY_DESCRIPTORS(mem, src) \
  	do { \
  		const struct usb_descriptor_header * const *__src; \
  		for (__src = src; *__src; ++__src) { \
  			memcpy(mem, *__src, (*__src)->bLength); \
  			mem += (*__src)->bLength; \
  		} \
  	} while (0)
  
  static int setup_packet(struct fusb300 *fusb300, struct usb_ctrlrequest *ctrl)
  {
  	u8 *p = (u8 *)ctrl;
  	u8 ret = 0;
  	u8 i = 0;
  
  	fusb300_rdcxf(fusb300, p, 8);
  	fusb300->ep0_dir = ctrl->bRequestType & USB_DIR_IN;
  	fusb300->ep0_length = ctrl->wLength;
  
  	/* check request */
  	if ((ctrl->bRequestType & USB_TYPE_MASK) == USB_TYPE_STANDARD) {
  		switch (ctrl->bRequest) {
  		case USB_REQ_GET_STATUS:
  			get_status(fusb300, ctrl);
  			break;
  		case USB_REQ_CLEAR_FEATURE:
  			clear_feature(fusb300, ctrl);
  			break;
  		case USB_REQ_SET_FEATURE:
  			set_feature(fusb300, ctrl);
  			break;
  		case USB_REQ_SET_ADDRESS:
  			set_address(fusb300, ctrl);
  			break;
  		case USB_REQ_SET_CONFIGURATION:
  			fusb300_enable_bit(fusb300, FUSB300_OFFSET_DAR,
  					   FUSB300_DAR_SETCONFG);
  			/* clear sequence number */
  			for (i = 1; i <= FUSB300_MAX_NUM_EP; i++)
  				fusb300_clear_seqnum(fusb300, i);
  			fusb300->reenum = 1;
  			ret = 1;
  			break;
  		default:
  			ret = 1;
  			break;
  		}
  	} else
  		ret = 1;
  
  	return ret;
  }
  
  static void done(struct fusb300_ep *ep, struct fusb300_request *req,
  		 int status)
  {
  	list_del_init(&req->queue);
  
  	/* don't modify queue heads during completion callback */
  	if (ep->fusb300->gadget.speed == USB_SPEED_UNKNOWN)
  		req->req.status = -ESHUTDOWN;
  	else
  		req->req.status = status;
  
  	spin_unlock(&ep->fusb300->lock);
  	req->req.complete(&ep->ep, &req->req);
  	spin_lock(&ep->fusb300->lock);
  
  	if (ep->epnum) {
  		disable_fifo_int(ep);
  		if (!list_empty(&ep->queue))
  			enable_fifo_int(ep);
  	} else
  		fusb300_set_cxdone(ep->fusb300);
  }
  
  static void fusb300_fill_idma_prdtbl(struct fusb300_ep *ep, dma_addr_t d,
  		u32 len)
  {
  	u32 value;
  	u32 reg;
  
  	/* wait SW owner */
  	do {
  		reg = ioread32(ep->fusb300->reg +
  			FUSB300_OFFSET_EPPRD_W0(ep->epnum));
  		reg &= FUSB300_EPPRD0_H;
  	} while (reg);
  
  	iowrite32(d, ep->fusb300->reg + FUSB300_OFFSET_EPPRD_W1(ep->epnum));
  
  	value = FUSB300_EPPRD0_BTC(len) | FUSB300_EPPRD0_H |
  		FUSB300_EPPRD0_F | FUSB300_EPPRD0_L | FUSB300_EPPRD0_I;
  	iowrite32(value, ep->fusb300->reg + FUSB300_OFFSET_EPPRD_W0(ep->epnum));
  
  	iowrite32(0x0, ep->fusb300->reg + FUSB300_OFFSET_EPPRD_W2(ep->epnum));
  
  	fusb300_enable_bit(ep->fusb300, FUSB300_OFFSET_EPPRDRDY,
  		FUSB300_EPPRDR_EP_PRD_RDY(ep->epnum));
  }
  
  static void fusb300_wait_idma_finished(struct fusb300_ep *ep)
  {
  	u32 reg;
  
  	do {
  		reg = ioread32(ep->fusb300->reg + FUSB300_OFFSET_IGR1);
  		if ((reg & FUSB300_IGR1_VBUS_CHG_INT) ||
  		    (reg & FUSB300_IGR1_WARM_RST_INT) ||
  		    (reg & FUSB300_IGR1_HOT_RST_INT) ||
  		    (reg & FUSB300_IGR1_USBRST_INT)
  		)
  			goto IDMA_RESET;
  		reg = ioread32(ep->fusb300->reg + FUSB300_OFFSET_IGR0);
  		reg &= FUSB300_IGR0_EPn_PRD_INT(ep->epnum);
  	} while (!reg);
  
  	fusb300_clear_int(ep->fusb300, FUSB300_OFFSET_IGR0,
  		FUSB300_IGR0_EPn_PRD_INT(ep->epnum));
  IDMA_RESET:
  	fusb300_clear_int(ep->fusb300, FUSB300_OFFSET_IGER0,
  		FUSB300_IGER0_EEPn_PRD_INT(ep->epnum));
  }
  
  static void  fusb300_set_idma(struct fusb300_ep *ep,
  			struct fusb300_request *req)
  {
  	dma_addr_t d;
  
  	d = dma_map_single(NULL, req->req.buf, req->req.length, DMA_TO_DEVICE);
  
  	if (dma_mapping_error(NULL, d)) {
  		printk(KERN_DEBUG "dma_mapping_error\n");
  		return;
  	}
  
  	dma_sync_single_for_device(NULL, d, req->req.length, DMA_TO_DEVICE);
  
  	fusb300_enable_bit(ep->fusb300, FUSB300_OFFSET_IGER0,
  		FUSB300_IGER0_EEPn_PRD_INT(ep->epnum));
  
  	fusb300_fill_idma_prdtbl(ep, d, req->req.length);
  	/* check idma is done */
  	fusb300_wait_idma_finished(ep);
  
  	dma_unmap_single(NULL, d, req->req.length, DMA_TO_DEVICE);
  }
  
  static void in_ep_fifo_handler(struct fusb300_ep *ep)
  {
  	struct fusb300_request *req = list_entry(ep->queue.next,
  					struct fusb300_request, queue);
  
  	if (req->req.length)
  		fusb300_set_idma(ep, req);
  	done(ep, req, 0);
  }
  
  static void out_ep_fifo_handler(struct fusb300_ep *ep)
  {
  	struct fusb300 *fusb300 = ep->fusb300;
  	struct fusb300_request *req = list_entry(ep->queue.next,
  						 struct fusb300_request, queue);
  	u32 reg = ioread32(fusb300->reg + FUSB300_OFFSET_EPFFR(ep->epnum));
  	u32 length = reg & FUSB300_FFR_BYCNT;
  
  	fusb300_rdfifo(ep, req, length);
  
  	/* finish out transfer */
  	if ((req->req.length == req->req.actual) || (length < ep->ep.maxpacket))
  		done(ep, req, 0);
  }
  
  static void check_device_mode(struct fusb300 *fusb300)
  {
  	u32 reg = ioread32(fusb300->reg + FUSB300_OFFSET_GCR);
  
  	switch (reg & FUSB300_GCR_DEVEN_MSK) {
  	case FUSB300_GCR_DEVEN_SS:
  		fusb300->gadget.speed = USB_SPEED_SUPER;
  		break;
  	case FUSB300_GCR_DEVEN_HS:
  		fusb300->gadget.speed = USB_SPEED_HIGH;
  		break;
  	case FUSB300_GCR_DEVEN_FS:
  		fusb300->gadget.speed = USB_SPEED_FULL;
  		break;
  	default:
  		fusb300->gadget.speed = USB_SPEED_UNKNOWN;
  		break;
  	}
  	printk(KERN_INFO "dev_mode = %d\n", (reg & FUSB300_GCR_DEVEN_MSK));
  }
  
  
  static void fusb300_ep0out(struct fusb300 *fusb300)
  {
  	struct fusb300_ep *ep = fusb300->ep[0];
  	u32 reg;
  
  	if (!list_empty(&ep->queue)) {
  		struct fusb300_request *req;
  
  		req = list_first_entry(&ep->queue,
  			struct fusb300_request, queue);
  		if (req->req.length)
  			fusb300_rdcxf(ep->fusb300, req->req.buf,
  				req->req.length);
  		done(ep, req, 0);
  		reg = ioread32(fusb300->reg + FUSB300_OFFSET_IGER1);
  		reg &= ~FUSB300_IGER1_CX_OUT_INT;
  		iowrite32(reg, fusb300->reg + FUSB300_OFFSET_IGER1);
  	} else
  		pr_err("%s : empty queue\n", __func__);
  }
  
  static void fusb300_ep0in(struct fusb300 *fusb300)
  {
  	struct fusb300_request *req;
  	struct fusb300_ep *ep = fusb300->ep[0];
  
  	if ((!list_empty(&ep->queue)) && (fusb300->ep0_dir)) {
  		req = list_entry(ep->queue.next,
  				struct fusb300_request, queue);
  		if (req->req.length)
  			fusb300_wrcxf(ep, req);
  		if ((req->req.length - req->req.actual) < ep->ep.maxpacket)
  			done(ep, req, 0);
  	} else
  		fusb300_set_cxdone(fusb300);
  }
  
  static void fusb300_grp2_handler(void)
  {
  }
  
  static void fusb300_grp3_handler(void)
  {
  }
  
  static void fusb300_grp4_handler(void)
  {
  }
  
  static void fusb300_grp5_handler(void)
  {
  }
  
  static irqreturn_t fusb300_irq(int irq, void *_fusb300)
  {
  	struct fusb300 *fusb300 = _fusb300;
  	u32 int_grp1 = ioread32(fusb300->reg + FUSB300_OFFSET_IGR1);
  	u32 int_grp1_en = ioread32(fusb300->reg + FUSB300_OFFSET_IGER1);
  	u32 int_grp0 = ioread32(fusb300->reg + FUSB300_OFFSET_IGR0);
  	u32 int_grp0_en = ioread32(fusb300->reg + FUSB300_OFFSET_IGER0);
  	struct usb_ctrlrequest ctrl;
  	u8 in;
  	u32 reg;
  	int i;
  
  	spin_lock(&fusb300->lock);
  
  	int_grp1 &= int_grp1_en;
  	int_grp0 &= int_grp0_en;
  
  	if (int_grp1 & FUSB300_IGR1_WARM_RST_INT) {
  		fusb300_clear_int(fusb300, FUSB300_OFFSET_IGR1,
  				  FUSB300_IGR1_WARM_RST_INT);
  		printk(KERN_INFO"fusb300_warmreset\n");
  		fusb300_reset();
  	}
  
  	if (int_grp1 & FUSB300_IGR1_HOT_RST_INT) {
  		fusb300_clear_int(fusb300, FUSB300_OFFSET_IGR1,
  				  FUSB300_IGR1_HOT_RST_INT);
  		printk(KERN_INFO"fusb300_hotreset\n");
  		fusb300_reset();
  	}
  
  	if (int_grp1 & FUSB300_IGR1_USBRST_INT) {
  		fusb300_clear_int(fusb300, FUSB300_OFFSET_IGR1,
  				  FUSB300_IGR1_USBRST_INT);
  		fusb300_reset();
  	}
  	/* COMABT_INT has a highest priority */
  
  	if (int_grp1 & FUSB300_IGR1_CX_COMABT_INT) {
  		fusb300_clear_int(fusb300, FUSB300_OFFSET_IGR1,
  				  FUSB300_IGR1_CX_COMABT_INT);
  		printk(KERN_INFO"fusb300_ep0abt\n");
  	}
  
  	if (int_grp1 & FUSB300_IGR1_VBUS_CHG_INT) {
  		fusb300_clear_int(fusb300, FUSB300_OFFSET_IGR1,
  				  FUSB300_IGR1_VBUS_CHG_INT);
  		printk(KERN_INFO"fusb300_vbus_change\n");
  	}
  
  	if (int_grp1 & FUSB300_IGR1_U3_EXIT_FAIL_INT) {
  		fusb300_clear_int(fusb300, FUSB300_OFFSET_IGR1,
  				  FUSB300_IGR1_U3_EXIT_FAIL_INT);
  	}
  
  	if (int_grp1 & FUSB300_IGR1_U2_EXIT_FAIL_INT) {
  		fusb300_clear_int(fusb300, FUSB300_OFFSET_IGR1,
  				  FUSB300_IGR1_U2_EXIT_FAIL_INT);
  	}
  
  	if (int_grp1 & FUSB300_IGR1_U1_EXIT_FAIL_INT) {
  		fusb300_clear_int(fusb300, FUSB300_OFFSET_IGR1,
  				  FUSB300_IGR1_U1_EXIT_FAIL_INT);
  	}
  
  	if (int_grp1 & FUSB300_IGR1_U2_ENTRY_FAIL_INT) {
  		fusb300_clear_int(fusb300, FUSB300_OFFSET_IGR1,
  				  FUSB300_IGR1_U2_ENTRY_FAIL_INT);
  	}
  
  	if (int_grp1 & FUSB300_IGR1_U1_ENTRY_FAIL_INT) {
  		fusb300_clear_int(fusb300, FUSB300_OFFSET_IGR1,
  				  FUSB300_IGR1_U1_ENTRY_FAIL_INT);
  	}
  
  	if (int_grp1 & FUSB300_IGR1_U3_EXIT_INT) {
  		fusb300_clear_int(fusb300, FUSB300_OFFSET_IGR1,
  				  FUSB300_IGR1_U3_EXIT_INT);
  		printk(KERN_INFO "FUSB300_IGR1_U3_EXIT_INT\n");
  	}
  
  	if (int_grp1 & FUSB300_IGR1_U2_EXIT_INT) {
  		fusb300_clear_int(fusb300, FUSB300_OFFSET_IGR1,
  				  FUSB300_IGR1_U2_EXIT_INT);
  		printk(KERN_INFO "FUSB300_IGR1_U2_EXIT_INT\n");
  	}
  
  	if (int_grp1 & FUSB300_IGR1_U1_EXIT_INT) {
  		fusb300_clear_int(fusb300, FUSB300_OFFSET_IGR1,
  				  FUSB300_IGR1_U1_EXIT_INT);
  		printk(KERN_INFO "FUSB300_IGR1_U1_EXIT_INT\n");
  	}
  
  	if (int_grp1 & FUSB300_IGR1_U3_ENTRY_INT) {
  		fusb300_clear_int(fusb300, FUSB300_OFFSET_IGR1,
  				  FUSB300_IGR1_U3_ENTRY_INT);
  		printk(KERN_INFO "FUSB300_IGR1_U3_ENTRY_INT\n");
  		fusb300_enable_bit(fusb300, FUSB300_OFFSET_SSCR1,
  				   FUSB300_SSCR1_GO_U3_DONE);
  	}
  
  	if (int_grp1 & FUSB300_IGR1_U2_ENTRY_INT) {
  		fusb300_clear_int(fusb300, FUSB300_OFFSET_IGR1,
  				  FUSB300_IGR1_U2_ENTRY_INT);
  		printk(KERN_INFO "FUSB300_IGR1_U2_ENTRY_INT\n");
  	}
  
  	if (int_grp1 & FUSB300_IGR1_U1_ENTRY_INT) {
  		fusb300_clear_int(fusb300, FUSB300_OFFSET_IGR1,
  				  FUSB300_IGR1_U1_ENTRY_INT);
  		printk(KERN_INFO "FUSB300_IGR1_U1_ENTRY_INT\n");
  	}
  
  	if (int_grp1 & FUSB300_IGR1_RESM_INT) {
  		fusb300_clear_int(fusb300, FUSB300_OFFSET_IGR1,
  				  FUSB300_IGR1_RESM_INT);
  		printk(KERN_INFO "fusb300_resume\n");
  	}
  
  	if (int_grp1 & FUSB300_IGR1_SUSP_INT) {
  		fusb300_clear_int(fusb300, FUSB300_OFFSET_IGR1,
  				  FUSB300_IGR1_SUSP_INT);
  		printk(KERN_INFO "fusb300_suspend\n");
  	}
  
  	if (int_grp1 & FUSB300_IGR1_HS_LPM_INT) {
  		fusb300_clear_int(fusb300, FUSB300_OFFSET_IGR1,
  				  FUSB300_IGR1_HS_LPM_INT);
  		printk(KERN_INFO "fusb300_HS_LPM_INT\n");
  	}
  
  	if (int_grp1 & FUSB300_IGR1_DEV_MODE_CHG_INT) {
  		fusb300_clear_int(fusb300, FUSB300_OFFSET_IGR1,
  				  FUSB300_IGR1_DEV_MODE_CHG_INT);
  		check_device_mode(fusb300);
  	}
  
  	if (int_grp1 & FUSB300_IGR1_CX_COMFAIL_INT) {
  		fusb300_set_cxstall(fusb300);
  		printk(KERN_INFO "fusb300_ep0fail\n");
  	}
  
  	if (int_grp1 & FUSB300_IGR1_CX_SETUP_INT) {
  		printk(KERN_INFO "fusb300_ep0setup\n");
  		if (setup_packet(fusb300, &ctrl)) {
  			spin_unlock(&fusb300->lock);
  			if (fusb300->driver->setup(&fusb300->gadget, &ctrl) < 0)
  				fusb300_set_cxstall(fusb300);
  			spin_lock(&fusb300->lock);
  		}
  	}
  
  	if (int_grp1 & FUSB300_IGR1_CX_CMDEND_INT)
  		printk(KERN_INFO "fusb300_cmdend\n");
  
  
  	if (int_grp1 & FUSB300_IGR1_CX_OUT_INT) {
  		printk(KERN_INFO "fusb300_cxout\n");
  		fusb300_ep0out(fusb300);
  	}
  
  	if (int_grp1 & FUSB300_IGR1_CX_IN_INT) {
  		printk(KERN_INFO "fusb300_cxin\n");
  		fusb300_ep0in(fusb300);
  	}
  
  	if (int_grp1 & FUSB300_IGR1_INTGRP5)
  		fusb300_grp5_handler();
  
  	if (int_grp1 & FUSB300_IGR1_INTGRP4)
  		fusb300_grp4_handler();
  
  	if (int_grp1 & FUSB300_IGR1_INTGRP3)
  		fusb300_grp3_handler();
  
  	if (int_grp1 & FUSB300_IGR1_INTGRP2)
  		fusb300_grp2_handler();
  
  	if (int_grp0) {
  		for (i = 1; i < FUSB300_MAX_NUM_EP; i++) {
  			if (int_grp0 & FUSB300_IGR0_EPn_FIFO_INT(i)) {
  				reg = ioread32(fusb300->reg +
  					FUSB300_OFFSET_EPSET1(i));
  				in = (reg & FUSB300_EPSET1_DIRIN) ? 1 : 0;
  				if (in)
  					in_ep_fifo_handler(fusb300->ep[i]);
  				else
  					out_ep_fifo_handler(fusb300->ep[i]);
  			}
  		}
  	}
  
  	spin_unlock(&fusb300->lock);
  
  	return IRQ_HANDLED;
  }
  
  static void fusb300_set_u2_timeout(struct fusb300 *fusb300,
  				   u32 time)
  {
  	u32 reg;
  
  	reg = ioread32(fusb300->reg + FUSB300_OFFSET_TT);
  	reg &= ~0xff;
  	reg |= FUSB300_SSCR2_U2TIMEOUT(time);
  
  	iowrite32(reg, fusb300->reg + FUSB300_OFFSET_TT);
  }
  
  static void fusb300_set_u1_timeout(struct fusb300 *fusb300,
  				   u32 time)
  {
  	u32 reg;
  
  	reg = ioread32(fusb300->reg + FUSB300_OFFSET_TT);
  	reg &= ~(0xff << 8);
  	reg |= FUSB300_SSCR2_U1TIMEOUT(time);
  
  	iowrite32(reg, fusb300->reg + FUSB300_OFFSET_TT);
  }
  
  static void init_controller(struct fusb300 *fusb300)
  {
  	u32 reg;
  	u32 mask = 0;
  	u32 val = 0;
  
  	/* split on */
  	mask = val = FUSB300_AHBBCR_S0_SPLIT_ON | FUSB300_AHBBCR_S1_SPLIT_ON;
  	reg = ioread32(fusb300->reg + FUSB300_OFFSET_AHBCR);
  	reg &= ~mask;
  	reg |= val;
  	iowrite32(reg, fusb300->reg + FUSB300_OFFSET_AHBCR);
  
  	/* enable high-speed LPM */
  	mask = val = FUSB300_HSCR_HS_LPM_PERMIT;
  	reg = ioread32(fusb300->reg + FUSB300_OFFSET_HSCR);
  	reg &= ~mask;
  	reg |= val;
  	iowrite32(reg, fusb300->reg + FUSB300_OFFSET_HSCR);
  
  	/*set u1 u2 timmer*/
  	fusb300_set_u2_timeout(fusb300, 0xff);
  	fusb300_set_u1_timeout(fusb300, 0xff);
  
  	/* enable all grp1 interrupt */
  	iowrite32(0xcfffff9f, fusb300->reg + FUSB300_OFFSET_IGER1);
  }
  /*------------------------------------------------------------------------*/
  static struct fusb300 *the_controller;
  
  static int fusb300_udc_start(struct usb_gadget_driver *driver,
  		int (*bind)(struct usb_gadget *))
  {
  	struct fusb300 *fusb300 = the_controller;
  	int retval;
  
  	if (!driver
  			|| driver->max_speed < USB_SPEED_FULL
  			|| !bind
  			|| !driver->setup)
  		return -EINVAL;
  
  	if (!fusb300)
  		return -ENODEV;
  
  	if (fusb300->driver)
  		return -EBUSY;
  
  	/* hook up the driver */
  	driver->driver.bus = NULL;
  	fusb300->driver = driver;
  	fusb300->gadget.dev.driver = &driver->driver;
  
  	retval = device_add(&fusb300->gadget.dev);
  	if (retval) {
  		pr_err("device_add error (%d)\n", retval);
  		goto error;
  	}
  
  	retval = bind(&fusb300->gadget);
  	if (retval) {
  		pr_err("bind to driver error (%d)\n", retval);
  		device_del(&fusb300->gadget.dev);
  		goto error;
  	}
  
  	return 0;
  
  error:
  	fusb300->driver = NULL;
  	fusb300->gadget.dev.driver = NULL;
  
  	return retval;
  }
  
  static int fusb300_udc_stop(struct usb_gadget_driver *driver)
  {
  	struct fusb300 *fusb300 = the_controller;
  
  	if (driver != fusb300->driver || !driver->unbind)
  		return -EINVAL;
  
  	driver->unbind(&fusb300->gadget);
  	fusb300->gadget.dev.driver = NULL;
  
  	init_controller(fusb300);
  	device_del(&fusb300->gadget.dev);
  	fusb300->driver = NULL;
  
  	return 0;
  }
  /*--------------------------------------------------------------------------*/
  
  static int fusb300_udc_pullup(struct usb_gadget *_gadget, int is_active)
  {
  	return 0;
  }
  
  static struct usb_gadget_ops fusb300_gadget_ops = {
  	.pullup		= fusb300_udc_pullup,
  	.start		= fusb300_udc_start,
  	.stop		= fusb300_udc_stop,
  };
  
  static int __exit fusb300_remove(struct platform_device *pdev)
  {
  	struct fusb300 *fusb300 = dev_get_drvdata(&pdev->dev);
  
  	usb_del_gadget_udc(&fusb300->gadget);
  	iounmap(fusb300->reg);
  	free_irq(platform_get_irq(pdev, 0), fusb300);
  
  	fusb300_free_request(&fusb300->ep[0]->ep, fusb300->ep0_req);
  	kfree(fusb300);
  
  	return 0;
  }
  
  static int __init fusb300_probe(struct platform_device *pdev)
  {
  	struct resource *res, *ires, *ires1;
  	void __iomem *reg = NULL;
  	struct fusb300 *fusb300 = NULL;
  	struct fusb300_ep *_ep[FUSB300_MAX_NUM_EP];
  	int ret = 0;
  	int i;
  
  	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
  	if (!res) {
  		ret = -ENODEV;
  		pr_err("platform_get_resource error.\n");
  		goto clean_up;
  	}
  
  	ires = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
  	if (!ires) {
  		ret = -ENODEV;
  		dev_err(&pdev->dev,
  			"platform_get_resource IORESOURCE_IRQ error.\n");
  		goto clean_up;
  	}
  
  	ires1 = platform_get_resource(pdev, IORESOURCE_IRQ, 1);
  	if (!ires1) {
  		ret = -ENODEV;
  		dev_err(&pdev->dev,
  			"platform_get_resource IORESOURCE_IRQ 1 error.\n");
  		goto clean_up;
  	}
  
  	reg = ioremap(res->start, resource_size(res));
  	if (reg == NULL) {
  		ret = -ENOMEM;
  		pr_err("ioremap error.\n");
  		goto clean_up;
  	}
  
  	/* initialize udc */
  	fusb300 = kzalloc(sizeof(struct fusb300), GFP_KERNEL);
  	if (fusb300 == NULL) {
  		pr_err("kzalloc error\n");
  		goto clean_up;
  	}
  
  	for (i = 0; i < FUSB300_MAX_NUM_EP; i++) {
  		_ep[i] = kzalloc(sizeof(struct fusb300_ep), GFP_KERNEL);
  		if (_ep[i] == NULL) {
  			pr_err("_ep kzalloc error\n");
  			goto clean_up;
  		}
  		fusb300->ep[i] = _ep[i];
  	}
  
  	spin_lock_init(&fusb300->lock);
  
  	dev_set_drvdata(&pdev->dev, fusb300);
  
  	fusb300->gadget.ops = &fusb300_gadget_ops;
  
  	device_initialize(&fusb300->gadget.dev);
  
  	dev_set_name(&fusb300->gadget.dev, "gadget");
  
  	fusb300->gadget.max_speed = USB_SPEED_HIGH;
  	fusb300->gadget.dev.parent = &pdev->dev;
  	fusb300->gadget.dev.dma_mask = pdev->dev.dma_mask;
  	fusb300->gadget.dev.release = pdev->dev.release;
  	fusb300->gadget.name = udc_name;
  	fusb300->reg = reg;
  
  	ret = request_irq(ires->start, fusb300_irq, IRQF_SHARED,
  			  udc_name, fusb300);
  	if (ret < 0) {
  		pr_err("request_irq error (%d)\n", ret);
  		goto clean_up;
  	}
  
  	ret = request_irq(ires1->start, fusb300_irq,
  			IRQF_SHARED, udc_name, fusb300);
  	if (ret < 0) {
  		pr_err("request_irq1 error (%d)\n", ret);
  		goto clean_up;
  	}
  
  	INIT_LIST_HEAD(&fusb300->gadget.ep_list);
  
  	for (i = 0; i < FUSB300_MAX_NUM_EP ; i++) {
  		struct fusb300_ep *ep = fusb300->ep[i];
  
  		if (i != 0) {
  			INIT_LIST_HEAD(&fusb300->ep[i]->ep.ep_list);
  			list_add_tail(&fusb300->ep[i]->ep.ep_list,
  				     &fusb300->gadget.ep_list);
  		}
  		ep->fusb300 = fusb300;
  		INIT_LIST_HEAD(&ep->queue);
  		ep->ep.name = fusb300_ep_name[i];
  		ep->ep.ops = &fusb300_ep_ops;
  		ep->ep.maxpacket = HS_BULK_MAX_PACKET_SIZE;
  	}
  	fusb300->ep[0]->ep.maxpacket = HS_CTL_MAX_PACKET_SIZE;
  	fusb300->ep[0]->epnum = 0;
  	fusb300->gadget.ep0 = &fusb300->ep[0]->ep;
  	INIT_LIST_HEAD(&fusb300->gadget.ep0->ep_list);
  
  	the_controller = fusb300;
  
  	fusb300->ep0_req = fusb300_alloc_request(&fusb300->ep[0]->ep,
  				GFP_KERNEL);
  	if (fusb300->ep0_req == NULL)
  		goto clean_up3;
  
  	init_controller(fusb300);
  	ret = usb_add_gadget_udc(&pdev->dev, &fusb300->gadget);
  	if (ret)
  		goto err_add_udc;
  
  	dev_info(&pdev->dev, "version %s\n", DRIVER_VERSION);
  
  	return 0;
  err_add_udc:
  	fusb300_free_request(&fusb300->ep[0]->ep, fusb300->ep0_req);
  
  clean_up3:
  	free_irq(ires->start, fusb300);
  
  clean_up:
  	if (fusb300) {
  		if (fusb300->ep0_req)
  			fusb300_free_request(&fusb300->ep[0]->ep,
  				fusb300->ep0_req);
  		kfree(fusb300);
  	}
  	if (reg)
  		iounmap(reg);
  
  	return ret;
  }
  
  static struct platform_driver fusb300_driver = {
  	.remove =	__exit_p(fusb300_remove),
  	.driver		= {
  		.name =	(char *) udc_name,
  		.owner	= THIS_MODULE,
  	},
  };
  
  static int __init fusb300_udc_init(void)
  {
  	return platform_driver_probe(&fusb300_driver, fusb300_probe);
  }
  
  module_init(fusb300_udc_init);
  
  static void __exit fusb300_udc_cleanup(void)
  {
  	platform_driver_unregister(&fusb300_driver);
  }
  module_exit(fusb300_udc_cleanup);
  