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r8a66597-hcd.c

/*
 * R8A66597 HCD (Host Controller Driver)
 *
 * Copyright (C) 2006-2007 Renesas Solutions Corp.
 * Portions Copyright (C) 2004 Psion Teklogix (for NetBook PRO)
 * Portions Copyright (C) 2004-2005 David Brownell
 * Portions Copyright (C) 1999 Roman Weissgaerber
 *
 * Author : Yoshihiro Shimoda <shimoda.yoshihiro@renesas.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.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 *
 */

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/smp_lock.h>
#include <linux/errno.h>
#include <linux/init.h>
#include <linux/timer.h>
#include <linux/delay.h>
#include <linux/list.h>
#include <linux/interrupt.h>
#include <linux/usb.h>
#include <linux/platform_device.h>
#include <linux/io.h>
#include <linux/irq.h>

#include "../core/hcd.h"
#include "r8a66597.h"

MODULE_DESCRIPTION("R8A66597 USB Host Controller Driver");
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Yoshihiro Shimoda");

#define DRIVER_VERSION  "29 May 2007"

static const char hcd_name[] = "r8a66597_hcd";

/* module parameters */
static unsigned short clock = XTAL12;
module_param(clock, ushort, 0644);
MODULE_PARM_DESC(clock, "input clock: 48MHz=32768, 24MHz=16384, 12MHz=0 "
            "(default=0)");

static unsigned short vif = LDRV;
module_param(vif, ushort, 0644);
MODULE_PARM_DESC(vif, "input VIF: 3.3V=32768, 1.5V=0(default=32768)");

static unsigned short endian;
module_param(endian, ushort, 0644);
MODULE_PARM_DESC(endian, "data endian: big=256, little=0 (default=0)");

static unsigned short irq_sense = INTL;
module_param(irq_sense, ushort, 0644);
MODULE_PARM_DESC(irq_sense, "IRQ sense: low level=32, falling edge=0 "
            "(default=32)");

static void packet_write(struct r8a66597 *r8a66597, u16 pipenum);
static int r8a66597_get_frame(struct usb_hcd *hcd);

/* this function must be called with interrupt disabled */
static void enable_pipe_irq(struct r8a66597 *r8a66597, u16 pipenum,
                      unsigned long reg)
{
      u16 tmp;

      tmp = r8a66597_read(r8a66597, INTENB0);
      r8a66597_bclr(r8a66597, BEMPE | NRDYE | BRDYE, INTENB0);
      r8a66597_bset(r8a66597, 1 << pipenum, reg);
      r8a66597_write(r8a66597, tmp, INTENB0);
}

/* this function must be called with interrupt disabled */
static void disable_pipe_irq(struct r8a66597 *r8a66597, u16 pipenum,
                       unsigned long reg)
{
      u16 tmp;

      tmp = r8a66597_read(r8a66597, INTENB0);
      r8a66597_bclr(r8a66597, BEMPE | NRDYE | BRDYE, INTENB0);
      r8a66597_bclr(r8a66597, 1 << pipenum, reg);
      r8a66597_write(r8a66597, tmp, INTENB0);
}

static void set_devadd_reg(struct r8a66597 *r8a66597, u8 r8a66597_address,
                     u16 usbspd, u8 upphub, u8 hubport, int port)
{
      u16 val;
      unsigned long devadd_reg = get_devadd_addr(r8a66597_address);

      val = (upphub << 11) | (hubport << 8) | (usbspd << 6) | (port & 0x0001);
      r8a66597_write(r8a66597, val, devadd_reg);
}

static int enable_controller(struct r8a66597 *r8a66597)
{
      u16 tmp;
      int i = 0;

      do {
            r8a66597_write(r8a66597, USBE, SYSCFG0);
            tmp = r8a66597_read(r8a66597, SYSCFG0);
            if (i++ > 1000) {
                  err("register access fail.");
                  return -ENXIO;
            }
      } while ((tmp & USBE) != USBE);
      r8a66597_bclr(r8a66597, USBE, SYSCFG0);
      r8a66597_mdfy(r8a66597, clock, XTAL, SYSCFG0);

      i = 0;
      r8a66597_bset(r8a66597, XCKE, SYSCFG0);
      do {
            msleep(1);
            tmp = r8a66597_read(r8a66597, SYSCFG0);
            if (i++ > 500) {
                  err("register access fail.");
                  return -ENXIO;
            }
      } while ((tmp & SCKE) != SCKE);

      r8a66597_bset(r8a66597, DCFM | DRPD, SYSCFG0);
      r8a66597_bset(r8a66597, DRPD, SYSCFG1);

      r8a66597_bset(r8a66597, vif & LDRV, PINCFG);
      r8a66597_bset(r8a66597, HSE, SYSCFG0);
      r8a66597_bset(r8a66597, HSE, SYSCFG1);
      r8a66597_bset(r8a66597, USBE, SYSCFG0);

      r8a66597_bset(r8a66597, BEMPE | NRDYE | BRDYE, INTENB0);
      r8a66597_bset(r8a66597, irq_sense & INTL, SOFCFG);
      r8a66597_bset(r8a66597, BRDY0, BRDYENB);
      r8a66597_bset(r8a66597, BEMP0, BEMPENB);

      r8a66597_write(r8a66597, BURST | CPU_ADR_RD_WR, DMA0CFG);
      r8a66597_write(r8a66597, BURST | CPU_ADR_RD_WR, DMA1CFG);

      r8a66597_bset(r8a66597, endian & BIGEND, CFIFOSEL);
      r8a66597_bset(r8a66597, endian & BIGEND, D0FIFOSEL);
      r8a66597_bset(r8a66597, endian & BIGEND, D1FIFOSEL);

      r8a66597_bset(r8a66597, TRNENSEL, SOFCFG);

      r8a66597_bset(r8a66597, SIGNE | SACKE, INTENB1);
      r8a66597_bclr(r8a66597, DTCHE, INTENB1);
      r8a66597_bset(r8a66597, ATTCHE, INTENB1);
      r8a66597_bclr(r8a66597, DTCHE, INTENB2);
      r8a66597_bset(r8a66597, ATTCHE, INTENB2);

      return 0;
}

static void disable_controller(struct r8a66597 *r8a66597)
{
      u16 tmp;

      r8a66597_write(r8a66597, 0, INTENB0);
      r8a66597_write(r8a66597, 0, INTENB1);
      r8a66597_write(r8a66597, 0, INTENB2);
      r8a66597_write(r8a66597, 0, INTSTS0);
      r8a66597_write(r8a66597, 0, INTSTS1);
      r8a66597_write(r8a66597, 0, INTSTS2);

      r8a66597_port_power(r8a66597, 0, 0);
      r8a66597_port_power(r8a66597, 1, 0);

      do {
            tmp = r8a66597_read(r8a66597, SOFCFG) & EDGESTS;
            udelay(640);
      } while (tmp == EDGESTS);

      r8a66597_bclr(r8a66597, DCFM | DRPD, SYSCFG0);
      r8a66597_bclr(r8a66597, DRPD, SYSCFG1);
      r8a66597_bclr(r8a66597, HSE, SYSCFG0);
      r8a66597_bclr(r8a66597, HSE, SYSCFG1);

      r8a66597_bclr(r8a66597, SCKE, SYSCFG0);
      udelay(1);
      r8a66597_bclr(r8a66597, PLLC, SYSCFG0);
      r8a66597_bclr(r8a66597, XCKE, SYSCFG0);
      r8a66597_bclr(r8a66597, USBE, SYSCFG0);
}

static int get_parent_r8a66597_address(struct r8a66597 *r8a66597,
                               struct usb_device *udev)
{
      struct r8a66597_device *dev;

      if (udev->parent && udev->parent->devnum != 1)
            udev = udev->parent;

      dev = dev_get_drvdata(&udev->dev);
      if (dev)
            return dev->address;
      else
            return 0;
}

static int is_child_device(char *devpath)
{
      return (devpath[2] ? 1 : 0);
}

static int is_hub_limit(char *devpath)
{
      return ((strlen(devpath) >= 4) ? 1 : 0);
}

static void get_port_number(char *devpath, u16 *root_port, u16 *hub_port)
{
      if (root_port) {
            *root_port = (devpath[0] & 0x0F) - 1;
            if (*root_port >= R8A66597_MAX_ROOT_HUB)
                  err("illegal root port number");
      }
      if (hub_port)
            *hub_port = devpath[2] & 0x0F;
}

static u16 get_r8a66597_usb_speed(enum usb_device_speed speed)
{
      u16 usbspd = 0;

      switch (speed) {
      case USB_SPEED_LOW:
            usbspd = LSMODE;
            break;
      case USB_SPEED_FULL:
            usbspd = FSMODE;
            break;
      case USB_SPEED_HIGH:
            usbspd = HSMODE;
            break;
      default:
            err("unknown speed");
            break;
      }

      return usbspd;
}

static void set_child_connect_map(struct r8a66597 *r8a66597, int address)
{
      int idx;

      idx = address / 32;
      r8a66597->child_connect_map[idx] |= 1 << (address % 32);
}

static void put_child_connect_map(struct r8a66597 *r8a66597, int address)
{
      int idx;

      idx = address / 32;
      r8a66597->child_connect_map[idx] &= ~(1 << (address % 32));
}

static void set_pipe_reg_addr(struct r8a66597_pipe *pipe, u8 dma_ch)
{
      u16 pipenum = pipe->info.pipenum;
      unsigned long fifoaddr[] = {D0FIFO, D1FIFO, CFIFO};
      unsigned long fifosel[] = {D0FIFOSEL, D1FIFOSEL, CFIFOSEL};
      unsigned long fifoctr[] = {D0FIFOCTR, D1FIFOCTR, CFIFOCTR};

      if (dma_ch > R8A66597_PIPE_NO_DMA)  /* dma fifo not use? */
            dma_ch = R8A66597_PIPE_NO_DMA;

      pipe->fifoaddr = fifoaddr[dma_ch];
      pipe->fifosel = fifosel[dma_ch];
      pipe->fifoctr = fifoctr[dma_ch];

      if (pipenum == 0)
            pipe->pipectr = DCPCTR;
      else
            pipe->pipectr = get_pipectr_addr(pipenum);

      if (check_bulk_or_isoc(pipenum)) {
            pipe->pipetre = get_pipetre_addr(pipenum);
            pipe->pipetrn = get_pipetrn_addr(pipenum);
      } else {
            pipe->pipetre = 0;
            pipe->pipetrn = 0;
      }
}

static struct r8a66597_device *
get_urb_to_r8a66597_dev(struct r8a66597 *r8a66597, struct urb *urb)
{
      if (usb_pipedevice(urb->pipe) == 0)
            return &r8a66597->device0;

      return dev_get_drvdata(&urb->dev->dev);
}

static int make_r8a66597_device(struct r8a66597 *r8a66597,
                        struct urb *urb, u8 addr)
{
      struct r8a66597_device *dev;
      int usb_address = urb->setup_packet[2];   /* urb->pipe is address 0 */

      dev = kzalloc(sizeof(struct r8a66597_device), GFP_ATOMIC);
      if (dev == NULL)
            return -ENOMEM;

      dev_set_drvdata(&urb->dev->dev, dev);
      dev->udev = urb->dev;
      dev->address = addr;
      dev->usb_address = usb_address;
      dev->state = USB_STATE_ADDRESS;
      dev->ep_in_toggle = 0;
      dev->ep_out_toggle = 0;
      INIT_LIST_HEAD(&dev->device_list);
      list_add_tail(&dev->device_list, &r8a66597->child_device);

      get_port_number(urb->dev->devpath, &dev->root_port, &dev->hub_port);
      if (!is_child_device(urb->dev->devpath))
            r8a66597->root_hub[dev->root_port].dev = dev;

      set_devadd_reg(r8a66597, dev->address,
                   get_r8a66597_usb_speed(urb->dev->speed),
                   get_parent_r8a66597_address(r8a66597, urb->dev),
                   dev->hub_port, dev->root_port);

      return 0;
}

/* this function must be called with interrupt disabled */
static u8 alloc_usb_address(struct r8a66597 *r8a66597, struct urb *urb)
{
      u8 addr;    /* R8A66597's address */
      struct r8a66597_device *dev;

      if (is_hub_limit(urb->dev->devpath)) {
            err("Externel hub limit reached.");
            return 0;
      }

      dev = get_urb_to_r8a66597_dev(r8a66597, urb);
      if (dev && dev->state >= USB_STATE_ADDRESS)
            return dev->address;

      for (addr = 1; addr <= R8A66597_MAX_DEVICE; addr++) {
            if (r8a66597->address_map & (1 << addr))
                  continue;

            dbg("alloc_address: r8a66597_addr=%d", addr);
            r8a66597->address_map |= 1 << addr;

            if (make_r8a66597_device(r8a66597, urb, addr) < 0)
                  return 0;

            return addr;
      }

      err("cannot communicate with a USB device more than 10.(%x)",
          r8a66597->address_map);

      return 0;
}

/* this function must be called with interrupt disabled */
static void free_usb_address(struct r8a66597 *r8a66597,
                       struct r8a66597_device *dev)
{
      int port;

      if (!dev)
            return;

      dbg("free_addr: addr=%d", dev->address);

      dev->state = USB_STATE_DEFAULT;
      r8a66597->address_map &= ~(1 << dev->address);
      dev->address = 0;
      dev_set_drvdata(&dev->udev->dev, NULL);
      list_del(&dev->device_list);
      kfree(dev);

      for (port = 0; port < R8A66597_MAX_ROOT_HUB; port++) {
            if (r8a66597->root_hub[port].dev == dev) {
                  r8a66597->root_hub[port].dev = NULL;
                  break;
            }
      }
}

static void r8a66597_reg_wait(struct r8a66597 *r8a66597, unsigned long reg,
                        u16 mask, u16 loop)
{
      u16 tmp;
      int i = 0;

      do {
            tmp = r8a66597_read(r8a66597, reg);
            if (i++ > 1000000) {
                  err("register%lx, loop %x is timeout", reg, loop);
                  break;
            }
            ndelay(1);
      } while ((tmp & mask) != loop);
}

/* this function must be called with interrupt disabled */
static void pipe_start(struct r8a66597 *r8a66597, struct r8a66597_pipe *pipe)
{
      u16 tmp;

      tmp = r8a66597_read(r8a66597, pipe->pipectr) & PID;
      if ((pipe->info.pipenum != 0) & ((tmp & PID_STALL) != 0)) /* stall? */
            r8a66597_mdfy(r8a66597, PID_NAK, PID, pipe->pipectr);
      r8a66597_mdfy(r8a66597, PID_BUF, PID, pipe->pipectr);
}

/* this function must be called with interrupt disabled */
static void pipe_stop(struct r8a66597 *r8a66597, struct r8a66597_pipe *pipe)
{
      u16 tmp;

      tmp = r8a66597_read(r8a66597, pipe->pipectr) & PID;
      if ((tmp & PID_STALL11) != PID_STALL11)   /* force stall? */
            r8a66597_mdfy(r8a66597, PID_STALL, PID, pipe->pipectr);
      r8a66597_mdfy(r8a66597, PID_NAK, PID, pipe->pipectr);
      r8a66597_reg_wait(r8a66597, pipe->pipectr, PBUSY, 0);
}

/* this function must be called with interrupt disabled */
static void clear_all_buffer(struct r8a66597 *r8a66597,
                       struct r8a66597_pipe *pipe)
{
      u16 tmp;

      if (!pipe || pipe->info.pipenum == 0)
            return;

      pipe_stop(r8a66597, pipe);
      r8a66597_bset(r8a66597, ACLRM, pipe->pipectr);
      tmp = r8a66597_read(r8a66597, pipe->pipectr);
      tmp = r8a66597_read(r8a66597, pipe->pipectr);
      tmp = r8a66597_read(r8a66597, pipe->pipectr);
      r8a66597_bclr(r8a66597, ACLRM, pipe->pipectr);
}

/* this function must be called with interrupt disabled */
static void r8a66597_pipe_toggle(struct r8a66597 *r8a66597,
                         struct r8a66597_pipe *pipe, int toggle)
{
      if (toggle)
            r8a66597_bset(r8a66597, SQSET, pipe->pipectr);
      else
            r8a66597_bset(r8a66597, SQCLR, pipe->pipectr);
}

/* this function must be called with interrupt disabled */
static inline void cfifo_change(struct r8a66597 *r8a66597, u16 pipenum)
{
      r8a66597_mdfy(r8a66597, MBW | pipenum, MBW | CURPIPE, CFIFOSEL);
      r8a66597_reg_wait(r8a66597, CFIFOSEL, CURPIPE, pipenum);
}

/* this function must be called with interrupt disabled */
static inline void fifo_change_from_pipe(struct r8a66597 *r8a66597,
                               struct r8a66597_pipe *pipe)
{
      cfifo_change(r8a66597, 0);
      r8a66597_mdfy(r8a66597, MBW | 0, MBW | CURPIPE, D0FIFOSEL);
      r8a66597_mdfy(r8a66597, MBW | 0, MBW | CURPIPE, D1FIFOSEL);

      r8a66597_mdfy(r8a66597, MBW | pipe->info.pipenum, MBW | CURPIPE,
                  pipe->fifosel);
      r8a66597_reg_wait(r8a66597, pipe->fifosel, CURPIPE, pipe->info.pipenum);
}

static u16 r8a66597_get_pipenum(struct urb *urb, struct usb_host_endpoint *hep)
{
      struct r8a66597_pipe *pipe = hep->hcpriv;

      if (usb_pipeendpoint(urb->pipe) == 0)
            return 0;
      else
            return pipe->info.pipenum;
}

static u16 get_urb_to_r8a66597_addr(struct r8a66597 *r8a66597, struct urb *urb)
{
      struct r8a66597_device *dev = get_urb_to_r8a66597_dev(r8a66597, urb);

      return (usb_pipedevice(urb->pipe) == 0) ? 0 : dev->address;
}

static unsigned short *get_toggle_pointer(struct r8a66597_device *dev,
                                int urb_pipe)
{
      if (!dev)
            return NULL;

      return usb_pipein(urb_pipe) ? &dev->ep_in_toggle : &dev->ep_out_toggle;
}

/* this function must be called with interrupt disabled */
static void pipe_toggle_set(struct r8a66597 *r8a66597,
                      struct r8a66597_pipe *pipe,
                      struct urb *urb, int set)
{
      struct r8a66597_device *dev = get_urb_to_r8a66597_dev(r8a66597, urb);
      unsigned char endpoint = usb_pipeendpoint(urb->pipe);
      unsigned short *toggle = get_toggle_pointer(dev, urb->pipe);

      if (!toggle)
            return;

      if (set)
            *toggle |= 1 << endpoint;
      else
            *toggle &= ~(1 << endpoint);
}

/* this function must be called with interrupt disabled */
static void pipe_toggle_save(struct r8a66597 *r8a66597,
                       struct r8a66597_pipe *pipe,
                       struct urb *urb)
{
      if (r8a66597_read(r8a66597, pipe->pipectr) & SQMON)
            pipe_toggle_set(r8a66597, pipe, urb, 1);
      else
            pipe_toggle_set(r8a66597, pipe, urb, 0);
}

/* this function must be called with interrupt disabled */
static void pipe_toggle_restore(struct r8a66597 *r8a66597,
                        struct r8a66597_pipe *pipe,
                        struct urb *urb)
{
      struct r8a66597_device *dev = get_urb_to_r8a66597_dev(r8a66597, urb);
      unsigned char endpoint = usb_pipeendpoint(urb->pipe);
      unsigned short *toggle = get_toggle_pointer(dev, urb->pipe);

      if (!toggle)
            return;

      r8a66597_pipe_toggle(r8a66597, pipe, *toggle & (1 << endpoint));
}

/* this function must be called with interrupt disabled */
static void pipe_buffer_setting(struct r8a66597 *r8a66597,
                        struct r8a66597_pipe_info *info)
{
      u16 val = 0;

      if (info->pipenum == 0)
            return;

      r8a66597_bset(r8a66597, ACLRM, get_pipectr_addr(info->pipenum));
      r8a66597_bclr(r8a66597, ACLRM, get_pipectr_addr(info->pipenum));
      r8a66597_write(r8a66597, info->pipenum, PIPESEL);
      if (!info->dir_in)
            val |= R8A66597_DIR;
      if (info->type == R8A66597_BULK && info->dir_in)
            val |= R8A66597_DBLB | R8A66597_SHTNAK;
      val |= info->type | info->epnum;
      r8a66597_write(r8a66597, val, PIPECFG);

      r8a66597_write(r8a66597, (info->buf_bsize << 10) | (info->bufnum),
                   PIPEBUF);
      r8a66597_write(r8a66597, make_devsel(info->address) | info->maxpacket,
                   PIPEMAXP);
      if (info->interval)
            info->interval--;
      r8a66597_write(r8a66597, info->interval, PIPEPERI);
}



/* this function must be called with interrupt disabled */
static void pipe_setting(struct r8a66597 *r8a66597, struct r8a66597_td *td)
{
      struct r8a66597_pipe_info *info;
      struct urb *urb = td->urb;

      if (td->pipenum > 0) {
            info = &td->pipe->info;
            cfifo_change(r8a66597, 0);
            pipe_buffer_setting(r8a66597, info);

            if (!usb_gettoggle(urb->dev, usb_pipeendpoint(urb->pipe),
                           usb_pipeout(urb->pipe)) &&
                !usb_pipecontrol(urb->pipe)) {
                  r8a66597_pipe_toggle(r8a66597, td->pipe, 0);
                  pipe_toggle_set(r8a66597, td->pipe, urb, 0);
                  clear_all_buffer(r8a66597, td->pipe);
                  usb_settoggle(urb->dev, usb_pipeendpoint(urb->pipe),
                              usb_pipeout(urb->pipe), 1);
            }
            pipe_toggle_restore(r8a66597, td->pipe, urb);
      }
}

/* this function must be called with interrupt disabled */
static u16 get_empty_pipenum(struct r8a66597 *r8a66597,
                       struct usb_endpoint_descriptor *ep)
{
      u16 array[R8A66597_MAX_NUM_PIPE], i = 0, min;

      memset(array, 0, sizeof(array));
      switch (ep->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) {
      case USB_ENDPOINT_XFER_BULK:
            if (ep->bEndpointAddress & USB_ENDPOINT_DIR_MASK)
                  array[i++] = 4;
            else {
                  array[i++] = 3;
                  array[i++] = 5;
            }
            break;
      case USB_ENDPOINT_XFER_INT:
            if (ep->bEndpointAddress & USB_ENDPOINT_DIR_MASK) {
                  array[i++] = 6;
                  array[i++] = 7;
                  array[i++] = 8;
            } else
                  array[i++] = 9;
            break;
      case USB_ENDPOINT_XFER_ISOC:
            if (ep->bEndpointAddress & USB_ENDPOINT_DIR_MASK)
                  array[i++] = 2;
            else
                  array[i++] = 1;
            break;
      default:
            err("Illegal type");
            return 0;
      }

      i = 1;
      min = array[0];
      while (array[i] != 0) {
            if (r8a66597->pipe_cnt[min] > r8a66597->pipe_cnt[array[i]])
                  min = array[i];
            i++;
      }

      return min;
}

static u16 get_r8a66597_type(__u8 type)
{
      u16 r8a66597_type;

      switch (type) {
      case USB_ENDPOINT_XFER_BULK:
            r8a66597_type = R8A66597_BULK;
            break;
      case USB_ENDPOINT_XFER_INT:
            r8a66597_type = R8A66597_INT;
            break;
      case USB_ENDPOINT_XFER_ISOC:
            r8a66597_type = R8A66597_ISO;
            break;
      default:
            err("Illegal type");
            r8a66597_type = 0x0000;
            break;
      }

      return r8a66597_type;
}

static u16 get_bufnum(u16 pipenum)
{
      u16 bufnum = 0;

      if (pipenum == 0)
            bufnum = 0;
      else if (check_bulk_or_isoc(pipenum))
            bufnum = 8 + (pipenum - 1) * R8A66597_BUF_BSIZE*2;
      else if (check_interrupt(pipenum))
            bufnum = 4 + (pipenum - 6);
      else
            err("Illegal pipenum (%d)", pipenum);

      return bufnum;
}

static u16 get_buf_bsize(u16 pipenum)
{
      u16 buf_bsize = 0;

      if (pipenum == 0)
            buf_bsize = 3;
      else if (check_bulk_or_isoc(pipenum))
            buf_bsize = R8A66597_BUF_BSIZE - 1;
      else if (check_interrupt(pipenum))
            buf_bsize = 0;
      else
            err("Illegal pipenum (%d)", pipenum);

      return buf_bsize;
}

/* this function must be called with interrupt disabled */
static void enable_r8a66597_pipe_dma(struct r8a66597 *r8a66597,
                             struct r8a66597_device *dev,
                             struct r8a66597_pipe *pipe,
                             struct urb *urb)
{
      int i;
      struct r8a66597_pipe_info *info = &pipe->info;

      if ((pipe->info.pipenum != 0) && (info->type != R8A66597_INT)) {
            for (i = 0; i < R8A66597_MAX_DMA_CHANNEL; i++) {
                  if ((r8a66597->dma_map & (1 << i)) != 0)
                        continue;

                  info("address %d, EndpointAddress 0x%02x use DMA FIFO",
                       usb_pipedevice(urb->pipe),
                       info->dir_in ? USB_ENDPOINT_DIR_MASK + info->epnum
                                  : info->epnum);

                  r8a66597->dma_map |= 1 << i;
                  dev->dma_map |= 1 << i;
                  set_pipe_reg_addr(pipe, i);

                  cfifo_change(r8a66597, 0);
                  r8a66597_mdfy(r8a66597, MBW | pipe->info.pipenum,
                              MBW | CURPIPE, pipe->fifosel);

                  r8a66597_reg_wait(r8a66597, pipe->fifosel, CURPIPE,
                                pipe->info.pipenum);
                  r8a66597_bset(r8a66597, BCLR, pipe->fifoctr);
                  break;
            }
      }
}

/* this function must be called with interrupt disabled */
static void enable_r8a66597_pipe(struct r8a66597 *r8a66597, struct urb *urb,
                         struct usb_host_endpoint *hep,
                         struct r8a66597_pipe_info *info)
{
      struct r8a66597_device *dev = get_urb_to_r8a66597_dev(r8a66597, urb);
      struct r8a66597_pipe *pipe = hep->hcpriv;

      dbg("enable_pipe:");

      pipe->info = *info;
      set_pipe_reg_addr(pipe, R8A66597_PIPE_NO_DMA);
      r8a66597->pipe_cnt[pipe->info.pipenum]++;
      dev->pipe_cnt[pipe->info.pipenum]++;

      enable_r8a66597_pipe_dma(r8a66597, dev, pipe, urb);
}

/* this function must be called with interrupt disabled */
static void force_dequeue(struct r8a66597 *r8a66597, u16 pipenum, u16 address)
{
      struct r8a66597_td *td, *next;
      struct urb *urb;
      struct list_head *list = &r8a66597->pipe_queue[pipenum];

      if (list_empty(list))
            return;

      list_for_each_entry_safe(td, next, list, queue) {
            if (!td)
                  continue;
            if (td->address != address)
                  continue;

            urb = td->urb;
            list_del(&td->queue);
            kfree(td);

            if (urb) {
                  usb_hcd_unlink_urb_from_ep(r8a66597_to_hcd(r8a66597),
                              urb);

                  spin_unlock(&r8a66597->lock);
                  usb_hcd_giveback_urb(r8a66597_to_hcd(r8a66597), urb,
                              -ENODEV);
                  spin_lock(&r8a66597->lock);
            }
            break;
      }
}

/* this function must be called with interrupt disabled */
static void disable_r8a66597_pipe_all(struct r8a66597 *r8a66597,
                              struct r8a66597_device *dev)
{
      int check_ep0 = 0;
      u16 pipenum;

      if (!dev)
            return;

      for (pipenum = 1; pipenum < R8A66597_MAX_NUM_PIPE; pipenum++) {
            if (!dev->pipe_cnt[pipenum])
                  continue;

            if (!check_ep0) {
                  check_ep0 = 1;
                  force_dequeue(r8a66597, 0, dev->address);
            }

            r8a66597->pipe_cnt[pipenum] -= dev->pipe_cnt[pipenum];
            dev->pipe_cnt[pipenum] = 0;
            force_dequeue(r8a66597, pipenum, dev->address);
      }

      dbg("disable_pipe");

      r8a66597->dma_map &= ~(dev->dma_map);
      dev->dma_map = 0;
}

/* this function must be called with interrupt disabled */
static void init_pipe_info(struct r8a66597 *r8a66597, struct urb *urb,
                     struct usb_host_endpoint *hep,
                     struct usb_endpoint_descriptor *ep)
{
      struct r8a66597_pipe_info info;

      info.pipenum = get_empty_pipenum(r8a66597, ep);
      info.address = get_urb_to_r8a66597_addr(r8a66597, urb);
      info.epnum = ep->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK;
      info.maxpacket = le16_to_cpu(ep->wMaxPacketSize);
      info.type = get_r8a66597_type(ep->bmAttributes
                              & USB_ENDPOINT_XFERTYPE_MASK);
      info.bufnum = get_bufnum(info.pipenum);
      info.buf_bsize = get_buf_bsize(info.pipenum);
      info.interval = ep->bInterval;
      if (ep->bEndpointAddress & USB_ENDPOINT_DIR_MASK)
            info.dir_in = 1;
      else
            info.dir_in = 0;

      enable_r8a66597_pipe(r8a66597, urb, hep, &info);
}

static void init_pipe_config(struct r8a66597 *r8a66597, struct urb *urb)
{
      struct r8a66597_device *dev;

      dev = get_urb_to_r8a66597_dev(r8a66597, urb);
      dev->state = USB_STATE_CONFIGURED;
}

static void pipe_irq_enable(struct r8a66597 *r8a66597, struct urb *urb,
                      u16 pipenum)
{
      if (pipenum == 0 && usb_pipeout(urb->pipe))
            enable_irq_empty(r8a66597, pipenum);
      else
            enable_irq_ready(r8a66597, pipenum);

      if (!usb_pipeisoc(urb->pipe))
            enable_irq_nrdy(r8a66597, pipenum);
}

static void pipe_irq_disable(struct r8a66597 *r8a66597, u16 pipenum)
{
      disable_irq_ready(r8a66597, pipenum);
      disable_irq_nrdy(r8a66597, pipenum);
}

/* this function must be called with interrupt disabled */
static void r8a66597_usb_preconnect(struct r8a66597 *r8a66597, int port)
{
      r8a66597->root_hub[port].port |= (1 << USB_PORT_FEAT_CONNECTION)
                               | (1 << USB_PORT_FEAT_C_CONNECTION);
      r8a66597_write(r8a66597, ~DTCH, get_intsts_reg(port));
      r8a66597_bset(r8a66597, DTCHE, get_intenb_reg(port));
}

/* this function must be called with interrupt disabled */
static void r8a66597_usb_connect(struct r8a66597 *r8a66597, int port)
{
      u16 speed = get_rh_usb_speed(r8a66597, port);
      struct r8a66597_root_hub *rh = &r8a66597->root_hub[port];

      if (speed == HSMODE)
            rh->port |= (1 << USB_PORT_FEAT_HIGHSPEED);
      else if (speed == LSMODE)
            rh->port |= (1 << USB_PORT_FEAT_LOWSPEED);

      rh->port &= ~(1 << USB_PORT_FEAT_RESET);
      rh->port |= 1 << USB_PORT_FEAT_ENABLE;
}

/* this function must be called with interrupt disabled */
static void r8a66597_usb_disconnect(struct r8a66597 *r8a66597, int port)
{
      struct r8a66597_device *dev = r8a66597->root_hub[port].dev;

      r8a66597->root_hub[port].port &= ~(1 << USB_PORT_FEAT_CONNECTION);
      r8a66597->root_hub[port].port |= (1 << USB_PORT_FEAT_C_CONNECTION);

      disable_r8a66597_pipe_all(r8a66597, dev);
      free_usb_address(r8a66597, dev);

      r8a66597_bset(r8a66597, ATTCHE, get_intenb_reg(port));
}

/* this function must be called with interrupt disabled */
static void prepare_setup_packet(struct r8a66597 *r8a66597,
                         struct r8a66597_td *td)
{
      int i;
      u16 *p = (u16 *)td->urb->setup_packet;
      unsigned long setup_addr = USBREQ;

      r8a66597_write(r8a66597, make_devsel(td->address) | td->maxpacket,
                   DCPMAXP);
      r8a66597_write(r8a66597, ~(SIGN | SACK), INTSTS1);

      for (i = 0; i < 4; i++) {
            r8a66597_write(r8a66597, cpu_to_le16(p[i]), setup_addr);
            setup_addr += 2;
      }
      r8a66597_write(r8a66597, SUREQ, DCPCTR);
}

/* this function must be called with interrupt disabled */
static void prepare_packet_read(struct r8a66597 *r8a66597,
                        struct r8a66597_td *td)
{
      struct urb *urb = td->urb;

      if (usb_pipecontrol(urb->pipe)) {
            r8a66597_bclr(r8a66597, R8A66597_DIR, DCPCFG);
            r8a66597_mdfy(r8a66597, 0, ISEL | CURPIPE, CFIFOSEL);
            r8a66597_reg_wait(r8a66597, CFIFOSEL, CURPIPE, 0);
            if (urb->actual_length == 0) {
                  r8a66597_pipe_toggle(r8a66597, td->pipe, 1);
                  r8a66597_write(r8a66597, BCLR, CFIFOCTR);
            }
            pipe_irq_disable(r8a66597, td->pipenum);
            pipe_start(r8a66597, td->pipe);
            pipe_irq_enable(r8a66597, urb, td->pipenum);
      } else {
            if (urb->actual_length == 0) {
                  pipe_irq_disable(r8a66597, td->pipenum);
                  pipe_setting(r8a66597, td);
                  pipe_stop(r8a66597, td->pipe);
                  r8a66597_write(r8a66597, ~(1 << td->pipenum), BRDYSTS);

                  if (td->pipe->pipetre) {
                        r8a66597_write(r8a66597, TRCLR,
                                    td->pipe->pipetre);
                        r8a66597_write(r8a66597,
                                    (urb->transfer_buffer_length
                                    + td->maxpacket - 1)
                                    / td->maxpacket,
                                    td->pipe->pipetrn);
                        r8a66597_bset(r8a66597, TRENB,
                                    td->pipe->pipetre);
                  }

                  pipe_start(r8a66597, td->pipe);
                  pipe_irq_enable(r8a66597, urb, td->pipenum);
            }
      }
}

/* this function must be called with interrupt disabled */
static void prepare_packet_write(struct r8a66597 *r8a66597,
                         struct r8a66597_td *td)
{
      u16 tmp;
      struct urb *urb = td->urb;

      if (usb_pipecontrol(urb->pipe)) {
            pipe_stop(r8a66597, td->pipe);
            r8a66597_bset(r8a66597, R8A66597_DIR, DCPCFG);
            r8a66597_mdfy(r8a66597, ISEL, ISEL | CURPIPE, CFIFOSEL);
            r8a66597_reg_wait(r8a66597, CFIFOSEL, CURPIPE, 0);
            if (urb->actual_length == 0) {
                  r8a66597_pipe_toggle(r8a66597, td->pipe, 1);
                  r8a66597_write(r8a66597, BCLR, CFIFOCTR);
            }
      } else {
            if (urb->actual_length == 0)
                  pipe_setting(r8a66597, td);
            if (td->pipe->pipetre)
                  r8a66597_bclr(r8a66597, TRENB, td->pipe->pipetre);
      }
      r8a66597_write(r8a66597, ~(1 << td->pipenum), BRDYSTS);

      fifo_change_from_pipe(r8a66597, td->pipe);
      tmp = r8a66597_read(r8a66597, td->pipe->fifoctr);
      if (unlikely((tmp & FRDY) == 0))
            pipe_irq_enable(r8a66597, urb, td->pipenum);
      else
            packet_write(r8a66597, td->pipenum);
      pipe_start(r8a66597, td->pipe);
}

/* this function must be called with interrupt disabled */
static void prepare_status_packet(struct r8a66597 *r8a66597,
                          struct r8a66597_td *td)
{
      struct urb *urb = td->urb;

      r8a66597_pipe_toggle(r8a66597, td->pipe, 1);
      pipe_stop(r8a66597, td->pipe);

      if (urb->setup_packet[0] & USB_ENDPOINT_DIR_MASK) {
            r8a66597_bset(r8a66597, R8A66597_DIR, DCPCFG);
            r8a66597_mdfy(r8a66597, ISEL, ISEL | CURPIPE, CFIFOSEL);
            r8a66597_reg_wait(r8a66597, CFIFOSEL, CURPIPE, 0);
            r8a66597_write(r8a66597, ~BEMP0, BEMPSTS);
            r8a66597_write(r8a66597, BCLR, CFIFOCTR);
            r8a66597_write(r8a66597, BVAL, CFIFOCTR);
            enable_irq_empty(r8a66597, 0);
      } else {
            r8a66597_bclr(r8a66597, R8A66597_DIR, DCPCFG);
            r8a66597_mdfy(r8a66597, 0, ISEL | CURPIPE, CFIFOSEL);
            r8a66597_reg_wait(r8a66597, CFIFOSEL, CURPIPE, 0);
            r8a66597_write(r8a66597, BCLR, CFIFOCTR);
            enable_irq_ready(r8a66597, 0);
      }
      enable_irq_nrdy(r8a66597, 0);
      pipe_start(r8a66597, td->pipe);
}

static int is_set_address(unsigned char *setup_packet)
{
      if (((setup_packet[0] & USB_TYPE_MASK) == USB_TYPE_STANDARD) &&
                  setup_packet[1] == USB_REQ_SET_ADDRESS)
            return 1;
      else
            return 0;
}

/* this function must be called with interrupt disabled */
static int start_transfer(struct r8a66597 *r8a66597, struct r8a66597_td *td)
{
      BUG_ON(!td);

      switch (td->type) {
      case USB_PID_SETUP:
            if (is_set_address(td->urb->setup_packet)) {
                  td->set_address = 1;
                  td->urb->setup_packet[2] = alloc_usb_address(r8a66597,
                                                     td->urb);
                  if (td->urb->setup_packet[2] == 0)
                        return -EPIPE;
            }
            prepare_setup_packet(r8a66597, td);
            break;
      case USB_PID_IN:
            prepare_packet_read(r8a66597, td);
            break;
      case USB_PID_OUT:
            prepare_packet_write(r8a66597, td);
            break;
      case USB_PID_ACK:
            prepare_status_packet(r8a66597, td);
            break;
      default:
            err("invalid type.");
            break;
      }

      return 0;
}

static int check_transfer_finish(struct r8a66597_td *td, struct urb *urb)
{
      if (usb_pipeisoc(urb->pipe)) {
            if (urb->number_of_packets == td->iso_cnt)
                  return 1;
      }

      /* control or bulk or interrupt */
      if ((urb->transfer_buffer_length <= urb->actual_length) ||
          (td->short_packet) || (td->zero_packet))
            return 1;

      return 0;
}

/* this function must be called with interrupt disabled */
static void set_td_timer(struct r8a66597 *r8a66597, struct r8a66597_td *td)
{
      unsigned long time;

      BUG_ON(!td);

      if (!list_empty(&r8a66597->pipe_queue[td->pipenum]) &&
          !usb_pipecontrol(td->urb->pipe) && usb_pipein(td->urb->pipe)) {
            r8a66597->timeout_map |= 1 << td->pipenum;
            switch (usb_pipetype(td->urb->pipe)) {
            case PIPE_INTERRUPT:
            case PIPE_ISOCHRONOUS:
                  time = 30;
                  break;
            default:
                  time = 300;
                  break;
            }

            mod_timer(&r8a66597->td_timer[td->pipenum],
                    jiffies + msecs_to_jiffies(time));
      }
}

/* this function must be called with interrupt disabled */
static void finish_request(struct r8a66597 *r8a66597, struct r8a66597_td *td,
            u16 pipenum, struct urb *urb, int status)
__releases(r8a66597->lock) __acquires(r8a66597->lock)
{
      int restart = 0;
      struct usb_hcd *hcd = r8a66597_to_hcd(r8a66597);

      r8a66597->timeout_map &= ~(1 << pipenum);

      if (likely(td)) {
            if (td->set_address && (status != 0 || urb->unlinked))
                  r8a66597->address_map &= ~(1 << urb->setup_packet[2]);

            pipe_toggle_save(r8a66597, td->pipe, urb);
            list_del(&td->queue);
            kfree(td);
      }

      if (!list_empty(&r8a66597->pipe_queue[pipenum]))
            restart = 1;

      if (likely(urb)) {
            if (usb_pipeisoc(urb->pipe))
                  urb->start_frame = r8a66597_get_frame(hcd);

            usb_hcd_unlink_urb_from_ep(r8a66597_to_hcd(r8a66597), urb);
            spin_unlock(&r8a66597->lock);
            usb_hcd_giveback_urb(hcd, urb, status);
            spin_lock(&r8a66597->lock);
      }

      if (restart) {
            td = r8a66597_get_td(r8a66597, pipenum);
            if (unlikely(!td))
                  return;

            start_transfer(r8a66597, td);
            set_td_timer(r8a66597, td);
      }
}

static void packet_read(struct r8a66597 *r8a66597, u16 pipenum)
{
      u16 tmp;
      int rcv_len, bufsize, urb_len, size;
      u16 *buf;
      struct r8a66597_td *td = r8a66597_get_td(r8a66597, pipenum);
      struct urb *urb;
      int finish = 0;
      int status = 0;

      if (unlikely(!td))
            return;
      urb = td->urb;

      fifo_change_from_pipe(r8a66597, td->pipe);
      tmp = r8a66597_read(r8a66597, td->pipe->fifoctr);
      if (unlikely((tmp & FRDY) == 0)) {
            pipe_stop(r8a66597, td->pipe);
            pipe_irq_disable(r8a66597, pipenum);
            err("in fifo not ready (%d)", pipenum);
            finish_request(r8a66597, td, pipenum, td->urb, -EPIPE);
            return;
      }

      /* prepare parameters */
      rcv_len = tmp & DTLN;
      if (usb_pipeisoc(urb->pipe)) {
            buf = (u16 *)(urb->transfer_buffer +
                        urb->iso_frame_desc[td->iso_cnt].offset);
            urb_len = urb->iso_frame_desc[td->iso_cnt].length;
      } else {
            buf = (void *)urb->transfer_buffer + urb->actual_length;
            urb_len = urb->transfer_buffer_length - urb->actual_length;
      }
      bufsize = min(urb_len, (int) td->maxpacket);
      if (rcv_len <= bufsize) {
            size = rcv_len;
      } else {
            size = bufsize;
            status = -EOVERFLOW;
            finish = 1;
      }

      /* update parameters */
      urb->actual_length += size;
      if (rcv_len == 0)
            td->zero_packet = 1;
      if (rcv_len < bufsize) {
            td->short_packet = 1;
      }
      if (usb_pipeisoc(urb->pipe)) {
            urb->iso_frame_desc[td->iso_cnt].actual_length = size;
            urb->iso_frame_desc[td->iso_cnt].status = status;
            td->iso_cnt++;
            finish = 0;
      }

      /* check transfer finish */
      if (finish || check_transfer_finish(td, urb)) {
            pipe_stop(r8a66597, td->pipe);
            pipe_irq_disable(r8a66597, pipenum);
            finish = 1;
      }

      /* read fifo */
      if (urb->transfer_buffer) {
            if (size == 0)
                  r8a66597_write(r8a66597, BCLR, td->pipe->fifoctr);
            else
                  r8a66597_read_fifo(r8a66597, td->pipe->fifoaddr,
                                 buf, size);
      }

      if (finish && pipenum != 0)
            finish_request(r8a66597, td, pipenum, urb, status);
}

static void packet_write(struct r8a66597 *r8a66597, u16 pipenum)
{
      u16 tmp;
      int bufsize, size;
      u16 *buf;
      struct r8a66597_td *td = r8a66597_get_td(r8a66597, pipenum);
      struct urb *urb;

      if (unlikely(!td))
            return;
      urb = td->urb;

      fifo_change_from_pipe(r8a66597, td->pipe);
      tmp = r8a66597_read(r8a66597, td->pipe->fifoctr);
      if (unlikely((tmp & FRDY) == 0)) {
            pipe_stop(r8a66597, td->pipe);
            pipe_irq_disable(r8a66597, pipenum);
            err("out write fifo not ready. (%d)", pipenum);
            finish_request(r8a66597, td, pipenum, urb, -EPIPE);
            return;
      }

      /* prepare parameters */
      bufsize = td->maxpacket;
      if (usb_pipeisoc(urb->pipe)) {
            buf = (u16 *)(urb->transfer_buffer +
                        urb->iso_frame_desc[td->iso_cnt].offset);
            size = min(bufsize,
                     (int)urb->iso_frame_desc[td->iso_cnt].length);
      } else {
            buf = (u16 *)(urb->transfer_buffer + urb->actual_length);
            size = min((int)bufsize,
                     urb->transfer_buffer_length - urb->actual_length);
      }

      /* write fifo */
      if (pipenum > 0)
            r8a66597_write(r8a66597, ~(1 << pipenum), BEMPSTS);
      if (urb->transfer_buffer) {
            r8a66597_write_fifo(r8a66597, td->pipe->fifoaddr, buf, size);
            if (!usb_pipebulk(urb->pipe) || td->maxpacket != size)
                  r8a66597_write(r8a66597, BVAL, td->pipe->fifoctr);
      }

      /* update parameters */
      urb->actual_length += size;
      if (usb_pipeisoc(urb->pipe)) {
            urb->iso_frame_desc[td->iso_cnt].actual_length = size;
            urb->iso_frame_desc[td->iso_cnt].status = 0;
            td->iso_cnt++;
      }

      /* check transfer finish */
      if (check_transfer_finish(td, urb)) {
            disable_irq_ready(r8a66597, pipenum);
            enable_irq_empty(r8a66597, pipenum);
            if (!usb_pipeisoc(urb->pipe))
                  enable_irq_nrdy(r8a66597, pipenum);
      } else
            pipe_irq_enable(r8a66597, urb, pipenum);
}


static void check_next_phase(struct r8a66597 *r8a66597, int status)
{
      struct r8a66597_td *td = r8a66597_get_td(r8a66597, 0);
      struct urb *urb;
      u8 finish = 0;

      if (unlikely(!td))
            return;
      urb = td->urb;

      switch (td->type) {
      case USB_PID_IN:
      case USB_PID_OUT:
            if (check_transfer_finish(td, urb))
                  td->type = USB_PID_ACK;
            break;
      case USB_PID_SETUP:
            if (urb->transfer_buffer_length == urb->actual_length)
                  td->type = USB_PID_ACK;
            else if (usb_pipeout(urb->pipe))
                  td->type = USB_PID_OUT;
            else
                  td->type = USB_PID_IN;
            break;
      case USB_PID_ACK:
            finish = 1;
            break;
      }

      if (finish || status != 0 || urb->unlinked)
            finish_request(r8a66597, td, 0, urb, status);
      else
            start_transfer(r8a66597, td);
}

static int get_urb_error(struct r8a66597 *r8a66597, u16 pipenum)
{
      struct r8a66597_td *td = r8a66597_get_td(r8a66597, pipenum);

      if (td) {
            u16 pid = r8a66597_read(r8a66597, td->pipe->pipectr) & PID;

            if (pid == PID_NAK)
                  return -ECONNRESET;
            else
                  return -EPIPE;
      }
      return 0;
}

static void irq_pipe_ready(struct r8a66597 *r8a66597)
{
      u16 check;
      u16 pipenum;
      u16 mask;
      struct r8a66597_td *td;

      mask = r8a66597_read(r8a66597, BRDYSTS)
             & r8a66597_read(r8a66597, BRDYENB);
      r8a66597_write(r8a66597, ~mask, BRDYSTS);
      if (mask & BRDY0) {
            td = r8a66597_get_td(r8a66597, 0);
            if (td && td->type == USB_PID_IN)
                  packet_read(r8a66597, 0);
            else
                  pipe_irq_disable(r8a66597, 0);
            check_next_phase(r8a66597, 0);
      }

      for (pipenum = 1; pipenum < R8A66597_MAX_NUM_PIPE; pipenum++) {
            check = 1 << pipenum;
            if (mask & check) {
                  td = r8a66597_get_td(r8a66597, pipenum);
                  if (unlikely(!td))
                        continue;

                  if (td->type == USB_PID_IN)
                        packet_read(r8a66597, pipenum);
                  else if (td->type == USB_PID_OUT)
                        packet_write(r8a66597, pipenum);
            }
      }
}

static void irq_pipe_empty(struct r8a66597 *r8a66597)
{
      u16 tmp;
      u16 check;
      u16 pipenum;
      u16 mask;
      struct r8a66597_td *td;

      mask = r8a66597_read(r8a66597, BEMPSTS)
             & r8a66597_read(r8a66597, BEMPENB);
      r8a66597_write(r8a66597, ~mask, BEMPSTS);
      if (mask & BEMP0) {
            cfifo_change(r8a66597, 0);
            td = r8a66597_get_td(r8a66597, 0);
            if (td && td->type != USB_PID_OUT)
                  disable_irq_empty(r8a66597, 0);
            check_next_phase(r8a66597, 0);
      }

      for (pipenum = 1; pipenum < R8A66597_MAX_NUM_PIPE; pipenum++) {
            check = 1 << pipenum;
            if (mask &  check) {
                  struct r8a66597_td *td;
                  td = r8a66597_get_td(r8a66597, pipenum);
                  if (unlikely(!td))
                        continue;

                  tmp = r8a66597_read(r8a66597, td->pipe->pipectr);
                  if ((tmp & INBUFM) == 0) {
                        disable_irq_empty(r8a66597, pipenum);
                        pipe_irq_disable(r8a66597, pipenum);
                        finish_request(r8a66597, td, pipenum, td->urb,
                                    0);
                  }
            }
      }
}

static void irq_pipe_nrdy(struct r8a66597 *r8a66597)
{
      u16 check;
      u16 pipenum;
      u16 mask;
      int status;

      mask = r8a66597_read(r8a66597, NRDYSTS)
             & r8a66597_read(r8a66597, NRDYENB);
      r8a66597_write(r8a66597, ~mask, NRDYSTS);
      if (mask & NRDY0) {
            cfifo_change(r8a66597, 0);
            status = get_urb_error(r8a66597, 0);
            pipe_irq_disable(r8a66597, 0);
            check_next_phase(r8a66597, status);
      }

      for (pipenum = 1; pipenum < R8A66597_MAX_NUM_PIPE; pipenum++) {
            check = 1 << pipenum;
            if (mask & check) {
                  struct r8a66597_td *td;
                  td = r8a66597_get_td(r8a66597, pipenum);
                  if (unlikely(!td))
                        continue;

                  status = get_urb_error(r8a66597, pipenum);
                  pipe_irq_disable(r8a66597, pipenum);
                  pipe_stop(r8a66597, td->pipe);
                  finish_request(r8a66597, td, pipenum, td->urb, status);
            }
      }
}

static void start_root_hub_sampling(struct r8a66597 *r8a66597, int port)
{
      struct r8a66597_root_hub *rh = &r8a66597->root_hub[port];

      rh->old_syssts = r8a66597_read(r8a66597, get_syssts_reg(port)) & LNST;
      rh->scount = R8A66597_MAX_SAMPLING;
      mod_timer(&r8a66597->rh_timer, jiffies + msecs_to_jiffies(50));
}

static irqreturn_t r8a66597_irq(struct usb_hcd *hcd)
{
      struct r8a66597 *r8a66597 = hcd_to_r8a66597(hcd);
      u16 intsts0, intsts1, intsts2;
      u16 intenb0, intenb1, intenb2;
      u16 mask0, mask1, mask2;
      int status;

      spin_lock(&r8a66597->lock);

      intsts0 = r8a66597_read(r8a66597, INTSTS0);
      intsts1 = r8a66597_read(r8a66597, INTSTS1);
      intsts2 = r8a66597_read(r8a66597, INTSTS2);
      intenb0 = r8a66597_read(r8a66597, INTENB0);
      intenb1 = r8a66597_read(r8a66597, INTENB1);
      intenb2 = r8a66597_read(r8a66597, INTENB2);

      mask2 = intsts2 & intenb2;
      mask1 = intsts1 & intenb1;
      mask0 = intsts0 & intenb0 & (BEMP | NRDY | BRDY);
      if (mask2) {
            if (mask2 & ATTCH) {
                  r8a66597_write(r8a66597, ~ATTCH, INTSTS2);
                  r8a66597_bclr(r8a66597, ATTCHE, INTENB2);

                  /* start usb bus sampling */
                  start_root_hub_sampling(r8a66597, 1);
            }
            if (mask2 & DTCH) {
                  r8a66597_write(r8a66597, ~DTCH, INTSTS2);
                  r8a66597_bclr(r8a66597, DTCHE, INTENB2);
                  r8a66597_usb_disconnect(r8a66597, 1);
            }
      }

      if (mask1) {
            if (mask1 & ATTCH) {
                  r8a66597_write(r8a66597, ~ATTCH, INTSTS1);
                  r8a66597_bclr(r8a66597, ATTCHE, INTENB1);

                  /* start usb bus sampling */
                  start_root_hub_sampling(r8a66597, 0);
            }
            if (mask1 & DTCH) {
                  r8a66597_write(r8a66597, ~DTCH, INTSTS1);
                  r8a66597_bclr(r8a66597, DTCHE, INTENB1);
                  r8a66597_usb_disconnect(r8a66597, 0);
            }
            if (mask1 & SIGN) {
                  r8a66597_write(r8a66597, ~SIGN, INTSTS1);
                  status = get_urb_error(r8a66597, 0);
                  check_next_phase(r8a66597, status);
            }
            if (mask1 & SACK) {
                  r8a66597_write(r8a66597, ~SACK, INTSTS1);
                  check_next_phase(r8a66597, 0);
            }
      }
      if (mask0) {
            if (mask0 & BRDY)
                  irq_pipe_ready(r8a66597);
            if (mask0 & BEMP)
                  irq_pipe_empty(r8a66597);
            if (mask0 & NRDY)
                  irq_pipe_nrdy(r8a66597);
      }

      spin_unlock(&r8a66597->lock);
      return IRQ_HANDLED;
}

/* this function must be called with interrupt disabled */
static void r8a66597_root_hub_control(struct r8a66597 *r8a66597, int port)
{
      u16 tmp;
      struct r8a66597_root_hub *rh = &r8a66597->root_hub[port];

      if (rh->port & (1 << USB_PORT_FEAT_RESET)) {
            unsigned long dvstctr_reg = get_dvstctr_reg(port);

            tmp = r8a66597_read(r8a66597, dvstctr_reg);
            if ((tmp & USBRST) == USBRST) {
                  r8a66597_mdfy(r8a66597, UACT, USBRST | UACT,
                              dvstctr_reg);
                  mod_timer(&r8a66597->rh_timer,
                          jiffies + msecs_to_jiffies(50));
            } else
                  r8a66597_usb_connect(r8a66597, port);
      }

      if (rh->scount > 0) {
            tmp = r8a66597_read(r8a66597, get_syssts_reg(port)) & LNST;
            if (tmp == rh->old_syssts) {
                  rh->scount--;
                  if (rh->scount == 0) {
                        if (tmp == FS_JSTS) {
                              r8a66597_bset(r8a66597, HSE,
                                          get_syscfg_reg(port));
                              r8a66597_usb_preconnect(r8a66597, port);
                        } else if (tmp == LS_JSTS) {
                              r8a66597_bclr(r8a66597, HSE,
                                          get_syscfg_reg(port));
                              r8a66597_usb_preconnect(r8a66597, port);
                        } else if (tmp == SE0)
                              r8a66597_bset(r8a66597, ATTCHE,
                                          get_intenb_reg(port));
                  } else {
                        mod_timer(&r8a66597->rh_timer,
                                jiffies + msecs_to_jiffies(50));
                  }
            } else {
                  rh->scount = R8A66597_MAX_SAMPLING;
                  rh->old_syssts = tmp;
                  mod_timer(&r8a66597->rh_timer,
                          jiffies + msecs_to_jiffies(50));
            }
      }
}

static void r8a66597_td_timer(unsigned long _r8a66597)
{
      struct r8a66597 *r8a66597 = (struct r8a66597 *)_r8a66597;
      unsigned long flags;
      u16 pipenum;
      struct r8a66597_td *td, *new_td = NULL;
      struct r8a66597_pipe *pipe;

      spin_lock_irqsave(&r8a66597->lock, flags);
      for (pipenum = 0; pipenum < R8A66597_MAX_NUM_PIPE; pipenum++) {
            if (!(r8a66597->timeout_map & (1 << pipenum)))
                  continue;
            if (timer_pending(&r8a66597->td_timer[pipenum]))
                  continue;

            td = r8a66597_get_td(r8a66597, pipenum);
            if (!td) {
                  r8a66597->timeout_map &= ~(1 << pipenum);
                  continue;
            }

            if (td->urb->actual_length) {
                  set_td_timer(r8a66597, td);
                  break;
            }

            pipe = td->pipe;
            pipe_stop(r8a66597, pipe);

            new_td = td;
            do {
                  list_move_tail(&new_td->queue,
                               &r8a66597->pipe_queue[pipenum]);
                  new_td = r8a66597_get_td(r8a66597, pipenum);
                  if (!new_td) {
                        new_td = td;
                        break;
                  }
            } while (td != new_td && td->address == new_td->address);

            start_transfer(r8a66597, new_td);

            if (td == new_td)
                  r8a66597->timeout_map &= ~(1 << pipenum);
            else
                  set_td_timer(r8a66597, new_td);
            break;
      }
      spin_unlock_irqrestore(&r8a66597->lock, flags);
}

static void r8a66597_timer(unsigned long _r8a66597)
{
      struct r8a66597 *r8a66597 = (struct r8a66597 *)_r8a66597;
      unsigned long flags;

      spin_lock_irqsave(&r8a66597->lock, flags);

      r8a66597_root_hub_control(r8a66597, 0);
      r8a66597_root_hub_control(r8a66597, 1);

      spin_unlock_irqrestore(&r8a66597->lock, flags);
}

static int check_pipe_config(struct r8a66597 *r8a66597, struct urb *urb)
{
      struct r8a66597_device *dev = get_urb_to_r8a66597_dev(r8a66597, urb);

      if (dev && dev->address && dev->state != USB_STATE_CONFIGURED &&
          (urb->dev->state == USB_STATE_CONFIGURED))
            return 1;
      else
            return 0;
}

static int r8a66597_start(struct usb_hcd *hcd)
{
      struct r8a66597 *r8a66597 = hcd_to_r8a66597(hcd);

      hcd->state = HC_STATE_RUNNING;
      return enable_controller(r8a66597);
}

static void r8a66597_stop(struct usb_hcd *hcd)
{
      struct r8a66597 *r8a66597 = hcd_to_r8a66597(hcd);

      disable_controller(r8a66597);
}

static void set_address_zero(struct r8a66597 *r8a66597, struct urb *urb)
{
      unsigned int usb_address = usb_pipedevice(urb->pipe);
      u16 root_port, hub_port;

      if (usb_address == 0) {
            get_port_number(urb->dev->devpath,
                        &root_port, &hub_port);
            set_devadd_reg(r8a66597, 0,
                         get_r8a66597_usb_speed(urb->dev->speed),
                         get_parent_r8a66597_address(r8a66597, urb->dev),
                         hub_port, root_port);
      }
}

static struct r8a66597_td *r8a66597_make_td(struct r8a66597 *r8a66597,
                                  struct urb *urb,
                                  struct usb_host_endpoint *hep)
{
      struct r8a66597_td *td;
      u16 pipenum;

      td = kzalloc(sizeof(struct r8a66597_td), GFP_ATOMIC);
      if (td == NULL)
            return NULL;

      pipenum = r8a66597_get_pipenum(urb, hep);
      td->pipenum = pipenum;
      td->pipe = hep->hcpriv;
      td->urb = urb;
      td->address = get_urb_to_r8a66597_addr(r8a66597, urb);
      td->maxpacket = usb_maxpacket(urb->dev, urb->pipe,
                              !usb_pipein(urb->pipe));
      if (usb_pipecontrol(urb->pipe))
            td->type = USB_PID_SETUP;
      else if (usb_pipein(urb->pipe))
            td->type = USB_PID_IN;
      else
            td->type = USB_PID_OUT;
      INIT_LIST_HEAD(&td->queue);

      return td;
}

static int r8a66597_urb_enqueue(struct usb_hcd *hcd,
                        struct urb *urb,
                        gfp_t mem_flags)
{
      struct usb_host_endpoint *hep = urb->ep;
      struct r8a66597 *r8a66597 = hcd_to_r8a66597(hcd);
      struct r8a66597_td *td = NULL;
      int ret, request = 0;
      unsigned long flags;

      spin_lock_irqsave(&r8a66597->lock, flags);
      if (!get_urb_to_r8a66597_dev(r8a66597, urb)) {
            ret = -ENODEV;
            goto error_not_linked;
      }

      ret = usb_hcd_link_urb_to_ep(hcd, urb);
      if (ret)
            goto error_not_linked;

      if (!hep->hcpriv) {
            hep->hcpriv = kzalloc(sizeof(struct r8a66597_pipe),
                        GFP_ATOMIC);
            if (!hep->hcpriv) {
                  ret = -ENOMEM;
                  goto error;
            }
            set_pipe_reg_addr(hep->hcpriv, R8A66597_PIPE_NO_DMA);
            if (usb_pipeendpoint(urb->pipe))
                  init_pipe_info(r8a66597, urb, hep, &hep->desc);
      }

      if (unlikely(check_pipe_config(r8a66597, urb)))
            init_pipe_config(r8a66597, urb);

      set_address_zero(r8a66597, urb);
      td = r8a66597_make_td(r8a66597, urb, hep);
      if (td == NULL) {
            ret = -ENOMEM;
            goto error;
      }
      if (list_empty(&r8a66597->pipe_queue[td->pipenum]))
            request = 1;
      list_add_tail(&td->queue, &r8a66597->pipe_queue[td->pipenum]);
      urb->hcpriv = td;

      if (request) {
            ret = start_transfer(r8a66597, td);
            if (ret < 0) {
                  list_del(&td->queue);
                  kfree(td);
            }
      } else
            set_td_timer(r8a66597, td);

error:
      if (ret)
            usb_hcd_unlink_urb_from_ep(hcd, urb);
error_not_linked:
      spin_unlock_irqrestore(&r8a66597->lock, flags);
      return ret;
}

static int r8a66597_urb_dequeue(struct usb_hcd *hcd, struct urb *urb,
            int status)
{
      struct r8a66597 *r8a66597 = hcd_to_r8a66597(hcd);
      struct r8a66597_td *td;
      unsigned long flags;
      int rc;

      spin_lock_irqsave(&r8a66597->lock, flags);
      rc = usb_hcd_check_unlink_urb(hcd, urb, status);
      if (rc)
            goto done;

      if (urb->hcpriv) {
            td = urb->hcpriv;
            pipe_stop(r8a66597, td->pipe);
            pipe_irq_disable(r8a66597, td->pipenum);
            disable_irq_empty(r8a66597, td->pipenum);
            finish_request(r8a66597, td, td->pipenum, urb, status);
      }
 done:
      spin_unlock_irqrestore(&r8a66597->lock, flags);
      return rc;
}

static void r8a66597_endpoint_disable(struct usb_hcd *hcd,
                              struct usb_host_endpoint *hep)
{
      struct r8a66597 *r8a66597 = hcd_to_r8a66597(hcd);
      struct r8a66597_pipe *pipe = (struct r8a66597_pipe *)hep->hcpriv;
      struct r8a66597_td *td;
      struct urb *urb = NULL;
      u16 pipenum;
      unsigned long flags;

      if (pipe == NULL)
            return;
      pipenum = pipe->info.pipenum;

      if (pipenum == 0) {
            kfree(hep->hcpriv);
            hep->hcpriv = NULL;
            return;
      }

      spin_lock_irqsave(&r8a66597->lock, flags);
      pipe_stop(r8a66597, pipe);
      pipe_irq_disable(r8a66597, pipenum);
      disable_irq_empty(r8a66597, pipenum);
      td = r8a66597_get_td(r8a66597, pipenum);
      if (td)
            urb = td->urb;
      finish_request(r8a66597, td, pipenum, urb, -ESHUTDOWN);
      kfree(hep->hcpriv);
      hep->hcpriv = NULL;
      spin_unlock_irqrestore(&r8a66597->lock, flags);
}

static int r8a66597_get_frame(struct usb_hcd *hcd)
{
      struct r8a66597 *r8a66597 = hcd_to_r8a66597(hcd);
      return r8a66597_read(r8a66597, FRMNUM) & 0x03FF;
}

static void collect_usb_address_map(struct usb_device *udev, unsigned long *map)
{
      int chix;

      if (udev->state == USB_STATE_CONFIGURED &&
          udev->parent && udev->parent->devnum > 1 &&
          udev->parent->descriptor.bDeviceClass == USB_CLASS_HUB)
            map[udev->devnum/32] |= (1 << (udev->devnum % 32));

      for (chix = 0; chix < udev->maxchild; chix++) {
            struct usb_device *childdev = udev->children[chix];

            if (childdev)
                  collect_usb_address_map(childdev, map);
      }
}

/* this function must be called with interrupt disabled */
static struct r8a66597_device *get_r8a66597_device(struct r8a66597 *r8a66597,
                                       int addr)
{
      struct r8a66597_device *dev;
      struct list_head *list = &r8a66597->child_device;

      list_for_each_entry(dev, list, device_list) {
            if (!dev)
                  continue;
            if (dev->usb_address != addr)
                  continue;

            return dev;
      }

      err("get_r8a66597_device fail.(%d)\n", addr);
      return NULL;
}

static void update_usb_address_map(struct r8a66597 *r8a66597,
                           struct usb_device *root_hub,
                           unsigned long *map)
{
      int i, j, addr;
      unsigned long diff;
      unsigned long flags;

      for (i = 0; i < 4; i++) {
            diff = r8a66597->child_connect_map[i] ^ map[i];
            if (!diff)
                  continue;

            for (j = 0; j < 32; j++) {
                  if (!(diff & (1 << j)))
                        continue;

                  addr = i * 32 + j;
                  if (map[i] & (1 << j))
                        set_child_connect_map(r8a66597, addr);
                  else {
                        struct r8a66597_device *dev;

                        spin_lock_irqsave(&r8a66597->lock, flags);
                        dev = get_r8a66597_device(r8a66597, addr);
                        disable_r8a66597_pipe_all(r8a66597, dev);
                        free_usb_address(r8a66597, dev);
                        put_child_connect_map(r8a66597, addr);
                        spin_unlock_irqrestore(&r8a66597->lock, flags);
                  }
            }
      }
}

static void r8a66597_check_detect_child(struct r8a66597 *r8a66597,
                              struct usb_hcd *hcd)
{
      struct usb_bus *bus;
      unsigned long now_map[4];

      memset(now_map, 0, sizeof(now_map));

      list_for_each_entry(bus, &usb_bus_list, bus_list) {
            if (!bus->root_hub)
                  continue;

            if (bus->busnum != hcd->self.busnum)
                  continue;

            collect_usb_address_map(bus->root_hub, now_map);
            update_usb_address_map(r8a66597, bus->root_hub, now_map);
      }
}

static int r8a66597_hub_status_data(struct usb_hcd *hcd, char *buf)
{
      struct r8a66597 *r8a66597 = hcd_to_r8a66597(hcd);
      unsigned long flags;
      int i;

      r8a66597_check_detect_child(r8a66597, hcd);

      spin_lock_irqsave(&r8a66597->lock, flags);

      *buf = 0;   /* initialize (no change) */

      for (i = 0; i < R8A66597_MAX_ROOT_HUB; i++) {
            if (r8a66597->root_hub[i].port & 0xffff0000)
                  *buf |= 1 << (i + 1);
      }

      spin_unlock_irqrestore(&r8a66597->lock, flags);

      return (*buf != 0);
}

static void r8a66597_hub_descriptor(struct r8a66597 *r8a66597,
                            struct usb_hub_descriptor *desc)
{
      desc->bDescriptorType = 0x29;
      desc->bHubContrCurrent = 0;
      desc->bNbrPorts = R8A66597_MAX_ROOT_HUB;
      desc->bDescLength = 9;
      desc->bPwrOn2PwrGood = 0;
      desc->wHubCharacteristics = cpu_to_le16(0x0011);
      desc->bitmap[0] = ((1 << R8A66597_MAX_ROOT_HUB) - 1) << 1;
      desc->bitmap[1] = ~0;
}

static int r8a66597_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
                        u16 wIndex, char *buf, u16 wLength)
{
      struct r8a66597 *r8a66597 = hcd_to_r8a66597(hcd);
      int ret;
      int port = (wIndex & 0x00FF) - 1;
      struct r8a66597_root_hub *rh = &r8a66597->root_hub[port];
      unsigned long flags;

      ret = 0;

      spin_lock_irqsave(&r8a66597->lock, flags);
      switch (typeReq) {
      case ClearHubFeature:
      case SetHubFeature:
            switch (wValue) {
            case C_HUB_OVER_CURRENT:
            case C_HUB_LOCAL_POWER:
                  break;
            default:
                  goto error;
            }
            break;
      case ClearPortFeature:
            if (wIndex > R8A66597_MAX_ROOT_HUB)
                  goto error;
            if (wLength != 0)
                  goto error;

            switch (wValue) {
            case USB_PORT_FEAT_ENABLE:
                  rh->port &= (1 << USB_PORT_FEAT_POWER);
                  break;
            case USB_PORT_FEAT_SUSPEND:
                  break;
            case USB_PORT_FEAT_POWER:
                  r8a66597_port_power(r8a66597, port, 0);
                  break;
            case USB_PORT_FEAT_C_ENABLE:
            case USB_PORT_FEAT_C_SUSPEND:
            case USB_PORT_FEAT_C_CONNECTION:
            case USB_PORT_FEAT_C_OVER_CURRENT:
            case USB_PORT_FEAT_C_RESET:
                  break;
            default:
                  goto error;
            }
            rh->port &= ~(1 << wValue);
            break;
      case GetHubDescriptor:
            r8a66597_hub_descriptor(r8a66597,
                              (struct usb_hub_descriptor *)buf);
            break;
      case GetHubStatus:
            *buf = 0x00;
            break;
      case GetPortStatus:
            if (wIndex > R8A66597_MAX_ROOT_HUB)
                  goto error;
            *(u32 *)buf = cpu_to_le32(rh->port);
            break;
      case SetPortFeature:
            if (wIndex > R8A66597_MAX_ROOT_HUB)
                  goto error;
            if (wLength != 0)
                  goto error;

            switch (wValue) {
            case USB_PORT_FEAT_SUSPEND:
                  break;
            case USB_PORT_FEAT_POWER:
                  r8a66597_port_power(r8a66597, port, 1);
                  rh->port |= (1 << USB_PORT_FEAT_POWER);
                  break;
            case USB_PORT_FEAT_RESET: {
                  struct r8a66597_device *dev = rh->dev;

                  rh->port |= (1 << USB_PORT_FEAT_RESET);

                  disable_r8a66597_pipe_all(r8a66597, dev);
                  free_usb_address(r8a66597, dev);

                  r8a66597_mdfy(r8a66597, USBRST, USBRST | UACT,
                              get_dvstctr_reg(port));
                  mod_timer(&r8a66597->rh_timer,
                          jiffies + msecs_to_jiffies(50));
                  }
                  break;
            default:
                  goto error;
            }
            rh->port |= 1 << wValue;
            break;
      default:
error:
            ret = -EPIPE;
            break;
      }

      spin_unlock_irqrestore(&r8a66597->lock, flags);
      return ret;
}

static struct hc_driver r8a66597_hc_driver = {
      .description =          hcd_name,
      .hcd_priv_size =  sizeof(struct r8a66597),
      .irq =                  r8a66597_irq,

      /*
       * generic hardware linkage
       */
      .flags =          HCD_USB2,

      .start =          r8a66597_start,
      .stop =                 r8a66597_stop,

      /*
       * managing i/o requests and associated device resources
       */
      .urb_enqueue =          r8a66597_urb_enqueue,
      .urb_dequeue =          r8a66597_urb_dequeue,
      .endpoint_disable =     r8a66597_endpoint_disable,

      /*
       * periodic schedule support
       */
      .get_frame_number =     r8a66597_get_frame,

      /*
       * root hub support
       */
      .hub_status_data =      r8a66597_hub_status_data,
      .hub_control =          r8a66597_hub_control,
};

#if defined(CONFIG_PM)
static int r8a66597_suspend(struct platform_device *pdev, pm_message_t state)
{
      pdev->dev.power.power_state = state;
      return 0;
}

static int r8a66597_resume(struct platform_device *pdev)
{
      pdev->dev.power.power_state = PMSG_ON;
      return 0;
}
#else /* if defined(CONFIG_PM) */
#define r8a66597_suspend      NULL
#define r8a66597_resume       NULL
#endif

static int __init_or_module r8a66597_remove(struct platform_device *pdev)
{
      struct r8a66597         *r8a66597 = dev_get_drvdata(&pdev->dev);
      struct usb_hcd          *hcd = r8a66597_to_hcd(r8a66597);

      del_timer_sync(&r8a66597->rh_timer);
      usb_remove_hcd(hcd);
      iounmap((void *)r8a66597->reg);
      usb_put_hcd(hcd);
      return 0;
}

#define resource_len(r) (((r)->end - (r)->start) + 1)
static int __init r8a66597_probe(struct platform_device *pdev)
{
      struct resource *res = NULL;
      int irq = -1;
      void __iomem *reg = NULL;
      struct usb_hcd *hcd = NULL;
      struct r8a66597 *r8a66597;
      int ret = 0;
      int i;

      if (pdev->dev.dma_mask) {
            ret = -EINVAL;
            err("dma not support");
            goto clean_up;
      }

      res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
                                 (char *)hcd_name);
      if (!res) {
            ret = -ENODEV;
            err("platform_get_resource_byname error.");
            goto clean_up;
      }

      irq = platform_get_irq(pdev, 0);
      if (irq < 0) {
            ret = -ENODEV;
            err("platform_get_irq error.");
            goto clean_up;
      }

      reg = ioremap(res->start, resource_len(res));
      if (reg == NULL) {
            ret = -ENOMEM;
            err("ioremap error.");
            goto clean_up;
      }

      /* initialize hcd */
      hcd = usb_create_hcd(&r8a66597_hc_driver, &pdev->dev, (char *)hcd_name);
      if (!hcd) {
            ret = -ENOMEM;
            err("Failed to create hcd");
            goto clean_up;
      }
      r8a66597 = hcd_to_r8a66597(hcd);
      memset(r8a66597, 0, sizeof(struct r8a66597));
      dev_set_drvdata(&pdev->dev, r8a66597);

      spin_lock_init(&r8a66597->lock);
      init_timer(&r8a66597->rh_timer);
      r8a66597->rh_timer.function = r8a66597_timer;
      r8a66597->rh_timer.data = (unsigned long)r8a66597;
      r8a66597->reg = (unsigned long)reg;

      for (i = 0; i < R8A66597_MAX_NUM_PIPE; i++) {
            INIT_LIST_HEAD(&r8a66597->pipe_queue[i]);
            init_timer(&r8a66597->td_timer[i]);
            r8a66597->td_timer[i].function = r8a66597_td_timer;
            r8a66597->td_timer[i].data = (unsigned long)r8a66597;
      }
      INIT_LIST_HEAD(&r8a66597->child_device);

      hcd->rsrc_start = res->start;
      ret = usb_add_hcd(hcd, irq, IRQF_DISABLED);
      if (ret != 0) {
            err("Failed to add hcd");
            goto clean_up;
      }

      return 0;

clean_up:
      if (reg)
            iounmap(reg);

      return ret;
}

static struct platform_driver r8a66597_driver = {
      .probe =    r8a66597_probe,
      .remove =   r8a66597_remove,
      .suspend =  r8a66597_suspend,
      .resume =   r8a66597_resume,
      .driver           = {
            .name = (char *) hcd_name,
      },
};

static int __init r8a66597_init(void)
{
      if (usb_disabled())
            return -ENODEV;

      info("driver %s, %s", hcd_name, DRIVER_VERSION);
      return platform_driver_register(&r8a66597_driver);
}
module_init(r8a66597_init);

static void __exit r8a66597_cleanup(void)
{
      platform_driver_unregister(&r8a66597_driver);
}
module_exit(r8a66597_cleanup);


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