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0001 // SPDX-License-Identifier: GPL-2.0
0002 /*
0003  * R8A66597 HCD (Host Controller Driver)
0004  *
0005  * Copyright (C) 2006-2007 Renesas Solutions Corp.
0006  * Portions Copyright (C) 2004 Psion Teklogix (for NetBook PRO)
0007  * Portions Copyright (C) 2004-2005 David Brownell
0008  * Portions Copyright (C) 1999 Roman Weissgaerber
0009  *
0010  * Author : Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
0011  */
0012 
0013 #include <linux/module.h>
0014 #include <linux/kernel.h>
0015 #include <linux/sched.h>
0016 #include <linux/errno.h>
0017 #include <linux/timer.h>
0018 #include <linux/delay.h>
0019 #include <linux/list.h>
0020 #include <linux/interrupt.h>
0021 #include <linux/usb.h>
0022 #include <linux/usb/hcd.h>
0023 #include <linux/platform_device.h>
0024 #include <linux/io.h>
0025 #include <linux/mm.h>
0026 #include <linux/irq.h>
0027 #include <linux/slab.h>
0028 #include <asm/cacheflush.h>
0029 
0030 #include "r8a66597.h"
0031 
0032 MODULE_DESCRIPTION("R8A66597 USB Host Controller Driver");
0033 MODULE_LICENSE("GPL");
0034 MODULE_AUTHOR("Yoshihiro Shimoda");
0035 MODULE_ALIAS("platform:r8a66597_hcd");
0036 
0037 #define DRIVER_VERSION  "2009-05-26"
0038 
0039 static const char hcd_name[] = "r8a66597_hcd";
0040 
0041 static void packet_write(struct r8a66597 *r8a66597, u16 pipenum);
0042 static int r8a66597_get_frame(struct usb_hcd *hcd);
0043 
0044 /* this function must be called with interrupt disabled */
0045 static void enable_pipe_irq(struct r8a66597 *r8a66597, u16 pipenum,
0046                 unsigned long reg)
0047 {
0048     u16 tmp;
0049 
0050     tmp = r8a66597_read(r8a66597, INTENB0);
0051     r8a66597_bclr(r8a66597, BEMPE | NRDYE | BRDYE, INTENB0);
0052     r8a66597_bset(r8a66597, 1 << pipenum, reg);
0053     r8a66597_write(r8a66597, tmp, INTENB0);
0054 }
0055 
0056 /* this function must be called with interrupt disabled */
0057 static void disable_pipe_irq(struct r8a66597 *r8a66597, u16 pipenum,
0058                  unsigned long reg)
0059 {
0060     u16 tmp;
0061 
0062     tmp = r8a66597_read(r8a66597, INTENB0);
0063     r8a66597_bclr(r8a66597, BEMPE | NRDYE | BRDYE, INTENB0);
0064     r8a66597_bclr(r8a66597, 1 << pipenum, reg);
0065     r8a66597_write(r8a66597, tmp, INTENB0);
0066 }
0067 
0068 static void set_devadd_reg(struct r8a66597 *r8a66597, u8 r8a66597_address,
0069                u16 usbspd, u8 upphub, u8 hubport, int port)
0070 {
0071     u16 val;
0072     unsigned long devadd_reg = get_devadd_addr(r8a66597_address);
0073 
0074     val = (upphub << 11) | (hubport << 8) | (usbspd << 6) | (port & 0x0001);
0075     r8a66597_write(r8a66597, val, devadd_reg);
0076 }
0077 
0078 static int r8a66597_clock_enable(struct r8a66597 *r8a66597)
0079 {
0080     u16 tmp;
0081     int i = 0;
0082 
0083     if (r8a66597->pdata->on_chip) {
0084         clk_prepare_enable(r8a66597->clk);
0085         do {
0086             r8a66597_write(r8a66597, SCKE, SYSCFG0);
0087             tmp = r8a66597_read(r8a66597, SYSCFG0);
0088             if (i++ > 1000) {
0089                 printk(KERN_ERR "r8a66597: reg access fail.\n");
0090                 return -ENXIO;
0091             }
0092         } while ((tmp & SCKE) != SCKE);
0093         r8a66597_write(r8a66597, 0x04, 0x02);
0094     } else {
0095         do {
0096             r8a66597_write(r8a66597, USBE, SYSCFG0);
0097             tmp = r8a66597_read(r8a66597, SYSCFG0);
0098             if (i++ > 1000) {
0099                 printk(KERN_ERR "r8a66597: reg access fail.\n");
0100                 return -ENXIO;
0101             }
0102         } while ((tmp & USBE) != USBE);
0103         r8a66597_bclr(r8a66597, USBE, SYSCFG0);
0104         r8a66597_mdfy(r8a66597, get_xtal_from_pdata(r8a66597->pdata),
0105                   XTAL, SYSCFG0);
0106 
0107         i = 0;
0108         r8a66597_bset(r8a66597, XCKE, SYSCFG0);
0109         do {
0110             msleep(1);
0111             tmp = r8a66597_read(r8a66597, SYSCFG0);
0112             if (i++ > 500) {
0113                 printk(KERN_ERR "r8a66597: reg access fail.\n");
0114                 return -ENXIO;
0115             }
0116         } while ((tmp & SCKE) != SCKE);
0117     }
0118 
0119     return 0;
0120 }
0121 
0122 static void r8a66597_clock_disable(struct r8a66597 *r8a66597)
0123 {
0124     r8a66597_bclr(r8a66597, SCKE, SYSCFG0);
0125     udelay(1);
0126 
0127     if (r8a66597->pdata->on_chip) {
0128         clk_disable_unprepare(r8a66597->clk);
0129     } else {
0130         r8a66597_bclr(r8a66597, PLLC, SYSCFG0);
0131         r8a66597_bclr(r8a66597, XCKE, SYSCFG0);
0132         r8a66597_bclr(r8a66597, USBE, SYSCFG0);
0133     }
0134 }
0135 
0136 static void r8a66597_enable_port(struct r8a66597 *r8a66597, int port)
0137 {
0138     u16 val;
0139 
0140     val = port ? DRPD : DCFM | DRPD;
0141     r8a66597_bset(r8a66597, val, get_syscfg_reg(port));
0142     r8a66597_bset(r8a66597, HSE, get_syscfg_reg(port));
0143 
0144     r8a66597_write(r8a66597, BURST | CPU_ADR_RD_WR, get_dmacfg_reg(port));
0145     r8a66597_bclr(r8a66597, DTCHE, get_intenb_reg(port));
0146     r8a66597_bset(r8a66597, ATTCHE, get_intenb_reg(port));
0147 }
0148 
0149 static void r8a66597_disable_port(struct r8a66597 *r8a66597, int port)
0150 {
0151     u16 val, tmp;
0152 
0153     r8a66597_write(r8a66597, 0, get_intenb_reg(port));
0154     r8a66597_write(r8a66597, 0, get_intsts_reg(port));
0155 
0156     r8a66597_port_power(r8a66597, port, 0);
0157 
0158     do {
0159         tmp = r8a66597_read(r8a66597, SOFCFG) & EDGESTS;
0160         udelay(640);
0161     } while (tmp == EDGESTS);
0162 
0163     val = port ? DRPD : DCFM | DRPD;
0164     r8a66597_bclr(r8a66597, val, get_syscfg_reg(port));
0165     r8a66597_bclr(r8a66597, HSE, get_syscfg_reg(port));
0166 }
0167 
0168 static int enable_controller(struct r8a66597 *r8a66597)
0169 {
0170     int ret, port;
0171     u16 vif = r8a66597->pdata->vif ? LDRV : 0;
0172     u16 irq_sense = r8a66597->irq_sense_low ? INTL : 0;
0173     u16 endian = r8a66597->pdata->endian ? BIGEND : 0;
0174 
0175     ret = r8a66597_clock_enable(r8a66597);
0176     if (ret < 0)
0177         return ret;
0178 
0179     r8a66597_bset(r8a66597, vif & LDRV, PINCFG);
0180     r8a66597_bset(r8a66597, USBE, SYSCFG0);
0181 
0182     r8a66597_bset(r8a66597, BEMPE | NRDYE | BRDYE, INTENB0);
0183     r8a66597_bset(r8a66597, irq_sense & INTL, SOFCFG);
0184     r8a66597_bset(r8a66597, BRDY0, BRDYENB);
0185     r8a66597_bset(r8a66597, BEMP0, BEMPENB);
0186 
0187     r8a66597_bset(r8a66597, endian & BIGEND, CFIFOSEL);
0188     r8a66597_bset(r8a66597, endian & BIGEND, D0FIFOSEL);
0189     r8a66597_bset(r8a66597, endian & BIGEND, D1FIFOSEL);
0190     r8a66597_bset(r8a66597, TRNENSEL, SOFCFG);
0191 
0192     r8a66597_bset(r8a66597, SIGNE | SACKE, INTENB1);
0193 
0194     for (port = 0; port < r8a66597->max_root_hub; port++)
0195         r8a66597_enable_port(r8a66597, port);
0196 
0197     return 0;
0198 }
0199 
0200 static void disable_controller(struct r8a66597 *r8a66597)
0201 {
0202     int port;
0203 
0204     /* disable interrupts */
0205     r8a66597_write(r8a66597, 0, INTENB0);
0206     r8a66597_write(r8a66597, 0, INTENB1);
0207     r8a66597_write(r8a66597, 0, BRDYENB);
0208     r8a66597_write(r8a66597, 0, BEMPENB);
0209     r8a66597_write(r8a66597, 0, NRDYENB);
0210 
0211     /* clear status */
0212     r8a66597_write(r8a66597, 0, BRDYSTS);
0213     r8a66597_write(r8a66597, 0, NRDYSTS);
0214     r8a66597_write(r8a66597, 0, BEMPSTS);
0215 
0216     for (port = 0; port < r8a66597->max_root_hub; port++)
0217         r8a66597_disable_port(r8a66597, port);
0218 
0219     r8a66597_clock_disable(r8a66597);
0220 }
0221 
0222 static int get_parent_r8a66597_address(struct r8a66597 *r8a66597,
0223                        struct usb_device *udev)
0224 {
0225     struct r8a66597_device *dev;
0226 
0227     if (udev->parent && udev->parent->devnum != 1)
0228         udev = udev->parent;
0229 
0230     dev = dev_get_drvdata(&udev->dev);
0231     if (dev)
0232         return dev->address;
0233     else
0234         return 0;
0235 }
0236 
0237 static int is_child_device(char *devpath)
0238 {
0239     return (devpath[2] ? 1 : 0);
0240 }
0241 
0242 static int is_hub_limit(char *devpath)
0243 {
0244     return ((strlen(devpath) >= 4) ? 1 : 0);
0245 }
0246 
0247 static void get_port_number(struct r8a66597 *r8a66597,
0248                 char *devpath, u16 *root_port, u16 *hub_port)
0249 {
0250     if (root_port) {
0251         *root_port = (devpath[0] & 0x0F) - 1;
0252         if (*root_port >= r8a66597->max_root_hub)
0253             printk(KERN_ERR "r8a66597: Illegal root port number.\n");
0254     }
0255     if (hub_port)
0256         *hub_port = devpath[2] & 0x0F;
0257 }
0258 
0259 static u16 get_r8a66597_usb_speed(enum usb_device_speed speed)
0260 {
0261     u16 usbspd = 0;
0262 
0263     switch (speed) {
0264     case USB_SPEED_LOW:
0265         usbspd = LSMODE;
0266         break;
0267     case USB_SPEED_FULL:
0268         usbspd = FSMODE;
0269         break;
0270     case USB_SPEED_HIGH:
0271         usbspd = HSMODE;
0272         break;
0273     default:
0274         printk(KERN_ERR "r8a66597: unknown speed\n");
0275         break;
0276     }
0277 
0278     return usbspd;
0279 }
0280 
0281 static void set_child_connect_map(struct r8a66597 *r8a66597, int address)
0282 {
0283     int idx;
0284 
0285     idx = address / 32;
0286     r8a66597->child_connect_map[idx] |= 1 << (address % 32);
0287 }
0288 
0289 static void put_child_connect_map(struct r8a66597 *r8a66597, int address)
0290 {
0291     int idx;
0292 
0293     idx = address / 32;
0294     r8a66597->child_connect_map[idx] &= ~(1 << (address % 32));
0295 }
0296 
0297 static void set_pipe_reg_addr(struct r8a66597_pipe *pipe, u8 dma_ch)
0298 {
0299     u16 pipenum = pipe->info.pipenum;
0300     const unsigned long fifoaddr[] = {D0FIFO, D1FIFO, CFIFO};
0301     const unsigned long fifosel[] = {D0FIFOSEL, D1FIFOSEL, CFIFOSEL};
0302     const unsigned long fifoctr[] = {D0FIFOCTR, D1FIFOCTR, CFIFOCTR};
0303 
0304     if (dma_ch > R8A66597_PIPE_NO_DMA)  /* dma fifo not use? */
0305         dma_ch = R8A66597_PIPE_NO_DMA;
0306 
0307     pipe->fifoaddr = fifoaddr[dma_ch];
0308     pipe->fifosel = fifosel[dma_ch];
0309     pipe->fifoctr = fifoctr[dma_ch];
0310 
0311     if (pipenum == 0)
0312         pipe->pipectr = DCPCTR;
0313     else
0314         pipe->pipectr = get_pipectr_addr(pipenum);
0315 
0316     if (check_bulk_or_isoc(pipenum)) {
0317         pipe->pipetre = get_pipetre_addr(pipenum);
0318         pipe->pipetrn = get_pipetrn_addr(pipenum);
0319     } else {
0320         pipe->pipetre = 0;
0321         pipe->pipetrn = 0;
0322     }
0323 }
0324 
0325 static struct r8a66597_device *
0326 get_urb_to_r8a66597_dev(struct r8a66597 *r8a66597, struct urb *urb)
0327 {
0328     if (usb_pipedevice(urb->pipe) == 0)
0329         return &r8a66597->device0;
0330 
0331     return dev_get_drvdata(&urb->dev->dev);
0332 }
0333 
0334 static int make_r8a66597_device(struct r8a66597 *r8a66597,
0335                 struct urb *urb, u8 addr)
0336 {
0337     struct r8a66597_device *dev;
0338     int usb_address = urb->setup_packet[2]; /* urb->pipe is address 0 */
0339 
0340     dev = kzalloc(sizeof(struct r8a66597_device), GFP_ATOMIC);
0341     if (dev == NULL)
0342         return -ENOMEM;
0343 
0344     dev_set_drvdata(&urb->dev->dev, dev);
0345     dev->udev = urb->dev;
0346     dev->address = addr;
0347     dev->usb_address = usb_address;
0348     dev->state = USB_STATE_ADDRESS;
0349     dev->ep_in_toggle = 0;
0350     dev->ep_out_toggle = 0;
0351     INIT_LIST_HEAD(&dev->device_list);
0352     list_add_tail(&dev->device_list, &r8a66597->child_device);
0353 
0354     get_port_number(r8a66597, urb->dev->devpath,
0355             &dev->root_port, &dev->hub_port);
0356     if (!is_child_device(urb->dev->devpath))
0357         r8a66597->root_hub[dev->root_port].dev = dev;
0358 
0359     set_devadd_reg(r8a66597, dev->address,
0360                get_r8a66597_usb_speed(urb->dev->speed),
0361                get_parent_r8a66597_address(r8a66597, urb->dev),
0362                dev->hub_port, dev->root_port);
0363 
0364     return 0;
0365 }
0366 
0367 /* this function must be called with interrupt disabled */
0368 static u8 alloc_usb_address(struct r8a66597 *r8a66597, struct urb *urb)
0369 {
0370     u8 addr;    /* R8A66597's address */
0371     struct r8a66597_device *dev;
0372 
0373     if (is_hub_limit(urb->dev->devpath)) {
0374         dev_err(&urb->dev->dev, "External hub limit reached.\n");
0375         return 0;
0376     }
0377 
0378     dev = get_urb_to_r8a66597_dev(r8a66597, urb);
0379     if (dev && dev->state >= USB_STATE_ADDRESS)
0380         return dev->address;
0381 
0382     for (addr = 1; addr <= R8A66597_MAX_DEVICE; addr++) {
0383         if (r8a66597->address_map & (1 << addr))
0384             continue;
0385 
0386         dev_dbg(&urb->dev->dev, "alloc_address: r8a66597_addr=%d\n", addr);
0387         r8a66597->address_map |= 1 << addr;
0388 
0389         if (make_r8a66597_device(r8a66597, urb, addr) < 0)
0390             return 0;
0391 
0392         return addr;
0393     }
0394 
0395     dev_err(&urb->dev->dev,
0396         "cannot communicate with a USB device more than 10.(%x)\n",
0397         r8a66597->address_map);
0398 
0399     return 0;
0400 }
0401 
0402 /* this function must be called with interrupt disabled */
0403 static void free_usb_address(struct r8a66597 *r8a66597,
0404                  struct r8a66597_device *dev, int reset)
0405 {
0406     int port;
0407 
0408     if (!dev)
0409         return;
0410 
0411     dev_dbg(&dev->udev->dev, "free_addr: addr=%d\n", dev->address);
0412 
0413     dev->state = USB_STATE_DEFAULT;
0414     r8a66597->address_map &= ~(1 << dev->address);
0415     dev->address = 0;
0416     /*
0417      * Only when resetting USB, it is necessary to erase drvdata. When
0418      * a usb device with usb hub is disconnect, "dev->udev" is already
0419      * freed on usb_desconnect(). So we cannot access the data.
0420      */
0421     if (reset)
0422         dev_set_drvdata(&dev->udev->dev, NULL);
0423     list_del(&dev->device_list);
0424     kfree(dev);
0425 
0426     for (port = 0; port < r8a66597->max_root_hub; port++) {
0427         if (r8a66597->root_hub[port].dev == dev) {
0428             r8a66597->root_hub[port].dev = NULL;
0429             break;
0430         }
0431     }
0432 }
0433 
0434 static void r8a66597_reg_wait(struct r8a66597 *r8a66597, unsigned long reg,
0435                   u16 mask, u16 loop)
0436 {
0437     u16 tmp;
0438     int i = 0;
0439 
0440     do {
0441         tmp = r8a66597_read(r8a66597, reg);
0442         if (i++ > 1000000) {
0443             printk(KERN_ERR "r8a66597: register%lx, loop %x "
0444                    "is timeout\n", reg, loop);
0445             break;
0446         }
0447         ndelay(1);
0448     } while ((tmp & mask) != loop);
0449 }
0450 
0451 /* this function must be called with interrupt disabled */
0452 static void pipe_start(struct r8a66597 *r8a66597, struct r8a66597_pipe *pipe)
0453 {
0454     u16 tmp;
0455 
0456     tmp = r8a66597_read(r8a66597, pipe->pipectr) & PID;
0457     if ((pipe->info.pipenum != 0) & ((tmp & PID_STALL) != 0)) /* stall? */
0458         r8a66597_mdfy(r8a66597, PID_NAK, PID, pipe->pipectr);
0459     r8a66597_mdfy(r8a66597, PID_BUF, PID, pipe->pipectr);
0460 }
0461 
0462 /* this function must be called with interrupt disabled */
0463 static void pipe_stop(struct r8a66597 *r8a66597, struct r8a66597_pipe *pipe)
0464 {
0465     u16 tmp;
0466 
0467     tmp = r8a66597_read(r8a66597, pipe->pipectr) & PID;
0468     if ((tmp & PID_STALL11) != PID_STALL11) /* force stall? */
0469         r8a66597_mdfy(r8a66597, PID_STALL, PID, pipe->pipectr);
0470     r8a66597_mdfy(r8a66597, PID_NAK, PID, pipe->pipectr);
0471     r8a66597_reg_wait(r8a66597, pipe->pipectr, PBUSY, 0);
0472 }
0473 
0474 /* this function must be called with interrupt disabled */
0475 static void clear_all_buffer(struct r8a66597 *r8a66597,
0476                  struct r8a66597_pipe *pipe)
0477 {
0478     if (!pipe || pipe->info.pipenum == 0)
0479         return;
0480 
0481     pipe_stop(r8a66597, pipe);
0482     r8a66597_bset(r8a66597, ACLRM, pipe->pipectr);
0483     r8a66597_read(r8a66597, pipe->pipectr);
0484     r8a66597_read(r8a66597, pipe->pipectr);
0485     r8a66597_read(r8a66597, pipe->pipectr);
0486     r8a66597_bclr(r8a66597, ACLRM, pipe->pipectr);
0487 }
0488 
0489 /* this function must be called with interrupt disabled */
0490 static void r8a66597_pipe_toggle(struct r8a66597 *r8a66597,
0491                  struct r8a66597_pipe *pipe, int toggle)
0492 {
0493     if (toggle)
0494         r8a66597_bset(r8a66597, SQSET, pipe->pipectr);
0495     else
0496         r8a66597_bset(r8a66597, SQCLR, pipe->pipectr);
0497 }
0498 
0499 static inline unsigned short mbw_value(struct r8a66597 *r8a66597)
0500 {
0501     if (r8a66597->pdata->on_chip)
0502         return MBW_32;
0503     else
0504         return MBW_16;
0505 }
0506 
0507 /* this function must be called with interrupt disabled */
0508 static inline void cfifo_change(struct r8a66597 *r8a66597, u16 pipenum)
0509 {
0510     unsigned short mbw = mbw_value(r8a66597);
0511 
0512     r8a66597_mdfy(r8a66597, mbw | pipenum, mbw | CURPIPE, CFIFOSEL);
0513     r8a66597_reg_wait(r8a66597, CFIFOSEL, CURPIPE, pipenum);
0514 }
0515 
0516 /* this function must be called with interrupt disabled */
0517 static inline void fifo_change_from_pipe(struct r8a66597 *r8a66597,
0518                      struct r8a66597_pipe *pipe)
0519 {
0520     unsigned short mbw = mbw_value(r8a66597);
0521 
0522     cfifo_change(r8a66597, 0);
0523     r8a66597_mdfy(r8a66597, mbw | 0, mbw | CURPIPE, D0FIFOSEL);
0524     r8a66597_mdfy(r8a66597, mbw | 0, mbw | CURPIPE, D1FIFOSEL);
0525 
0526     r8a66597_mdfy(r8a66597, mbw | pipe->info.pipenum, mbw | CURPIPE,
0527               pipe->fifosel);
0528     r8a66597_reg_wait(r8a66597, pipe->fifosel, CURPIPE, pipe->info.pipenum);
0529 }
0530 
0531 static u16 r8a66597_get_pipenum(struct urb *urb, struct usb_host_endpoint *hep)
0532 {
0533     struct r8a66597_pipe *pipe = hep->hcpriv;
0534 
0535     if (usb_pipeendpoint(urb->pipe) == 0)
0536         return 0;
0537     else
0538         return pipe->info.pipenum;
0539 }
0540 
0541 static u16 get_urb_to_r8a66597_addr(struct r8a66597 *r8a66597, struct urb *urb)
0542 {
0543     struct r8a66597_device *dev = get_urb_to_r8a66597_dev(r8a66597, urb);
0544 
0545     return (usb_pipedevice(urb->pipe) == 0) ? 0 : dev->address;
0546 }
0547 
0548 static unsigned short *get_toggle_pointer(struct r8a66597_device *dev,
0549                       int urb_pipe)
0550 {
0551     if (!dev)
0552         return NULL;
0553 
0554     return usb_pipein(urb_pipe) ? &dev->ep_in_toggle : &dev->ep_out_toggle;
0555 }
0556 
0557 /* this function must be called with interrupt disabled */
0558 static void pipe_toggle_set(struct r8a66597 *r8a66597,
0559                 struct r8a66597_pipe *pipe,
0560                 struct urb *urb, int set)
0561 {
0562     struct r8a66597_device *dev = get_urb_to_r8a66597_dev(r8a66597, urb);
0563     unsigned char endpoint = usb_pipeendpoint(urb->pipe);
0564     unsigned short *toggle = get_toggle_pointer(dev, urb->pipe);
0565 
0566     if (!toggle)
0567         return;
0568 
0569     if (set)
0570         *toggle |= 1 << endpoint;
0571     else
0572         *toggle &= ~(1 << endpoint);
0573 }
0574 
0575 /* this function must be called with interrupt disabled */
0576 static void pipe_toggle_save(struct r8a66597 *r8a66597,
0577                  struct r8a66597_pipe *pipe,
0578                  struct urb *urb)
0579 {
0580     if (r8a66597_read(r8a66597, pipe->pipectr) & SQMON)
0581         pipe_toggle_set(r8a66597, pipe, urb, 1);
0582     else
0583         pipe_toggle_set(r8a66597, pipe, urb, 0);
0584 }
0585 
0586 /* this function must be called with interrupt disabled */
0587 static void pipe_toggle_restore(struct r8a66597 *r8a66597,
0588                 struct r8a66597_pipe *pipe,
0589                 struct urb *urb)
0590 {
0591     struct r8a66597_device *dev = get_urb_to_r8a66597_dev(r8a66597, urb);
0592     unsigned char endpoint = usb_pipeendpoint(urb->pipe);
0593     unsigned short *toggle = get_toggle_pointer(dev, urb->pipe);
0594 
0595     if (!toggle)
0596         return;
0597 
0598     r8a66597_pipe_toggle(r8a66597, pipe, *toggle & (1 << endpoint));
0599 }
0600 
0601 /* this function must be called with interrupt disabled */
0602 static void pipe_buffer_setting(struct r8a66597 *r8a66597,
0603                 struct r8a66597_pipe_info *info)
0604 {
0605     u16 val = 0;
0606 
0607     if (info->pipenum == 0)
0608         return;
0609 
0610     r8a66597_bset(r8a66597, ACLRM, get_pipectr_addr(info->pipenum));
0611     r8a66597_bclr(r8a66597, ACLRM, get_pipectr_addr(info->pipenum));
0612     r8a66597_write(r8a66597, info->pipenum, PIPESEL);
0613     if (!info->dir_in)
0614         val |= R8A66597_DIR;
0615     if (info->type == R8A66597_BULK && info->dir_in)
0616         val |= R8A66597_DBLB | R8A66597_SHTNAK;
0617     val |= info->type | info->epnum;
0618     r8a66597_write(r8a66597, val, PIPECFG);
0619 
0620     r8a66597_write(r8a66597, (info->buf_bsize << 10) | (info->bufnum),
0621                PIPEBUF);
0622     r8a66597_write(r8a66597, make_devsel(info->address) | info->maxpacket,
0623                PIPEMAXP);
0624     r8a66597_write(r8a66597, info->interval, PIPEPERI);
0625 }
0626 
0627 /* this function must be called with interrupt disabled */
0628 static void pipe_setting(struct r8a66597 *r8a66597, struct r8a66597_td *td)
0629 {
0630     struct r8a66597_pipe_info *info;
0631     struct urb *urb = td->urb;
0632 
0633     if (td->pipenum > 0) {
0634         info = &td->pipe->info;
0635         cfifo_change(r8a66597, 0);
0636         pipe_buffer_setting(r8a66597, info);
0637 
0638         if (!usb_gettoggle(urb->dev, usb_pipeendpoint(urb->pipe),
0639                    usb_pipeout(urb->pipe)) &&
0640             !usb_pipecontrol(urb->pipe)) {
0641             r8a66597_pipe_toggle(r8a66597, td->pipe, 0);
0642             pipe_toggle_set(r8a66597, td->pipe, urb, 0);
0643             clear_all_buffer(r8a66597, td->pipe);
0644             usb_settoggle(urb->dev, usb_pipeendpoint(urb->pipe),
0645                       usb_pipeout(urb->pipe), 1);
0646         }
0647         pipe_toggle_restore(r8a66597, td->pipe, urb);
0648     }
0649 }
0650 
0651 /* this function must be called with interrupt disabled */
0652 static u16 get_empty_pipenum(struct r8a66597 *r8a66597,
0653                  struct usb_endpoint_descriptor *ep)
0654 {
0655     u16 array[R8A66597_MAX_NUM_PIPE], i = 0, min;
0656 
0657     memset(array, 0, sizeof(array));
0658     switch (usb_endpoint_type(ep)) {
0659     case USB_ENDPOINT_XFER_BULK:
0660         if (usb_endpoint_dir_in(ep))
0661             array[i++] = 4;
0662         else {
0663             array[i++] = 3;
0664             array[i++] = 5;
0665         }
0666         break;
0667     case USB_ENDPOINT_XFER_INT:
0668         if (usb_endpoint_dir_in(ep)) {
0669             array[i++] = 6;
0670             array[i++] = 7;
0671             array[i++] = 8;
0672         } else
0673             array[i++] = 9;
0674         break;
0675     case USB_ENDPOINT_XFER_ISOC:
0676         if (usb_endpoint_dir_in(ep))
0677             array[i++] = 2;
0678         else
0679             array[i++] = 1;
0680         break;
0681     default:
0682         printk(KERN_ERR "r8a66597: Illegal type\n");
0683         return 0;
0684     }
0685 
0686     i = 1;
0687     min = array[0];
0688     while (array[i] != 0) {
0689         if (r8a66597->pipe_cnt[min] > r8a66597->pipe_cnt[array[i]])
0690             min = array[i];
0691         i++;
0692     }
0693 
0694     return min;
0695 }
0696 
0697 static u16 get_r8a66597_type(__u8 type)
0698 {
0699     u16 r8a66597_type;
0700 
0701     switch (type) {
0702     case USB_ENDPOINT_XFER_BULK:
0703         r8a66597_type = R8A66597_BULK;
0704         break;
0705     case USB_ENDPOINT_XFER_INT:
0706         r8a66597_type = R8A66597_INT;
0707         break;
0708     case USB_ENDPOINT_XFER_ISOC:
0709         r8a66597_type = R8A66597_ISO;
0710         break;
0711     default:
0712         printk(KERN_ERR "r8a66597: Illegal type\n");
0713         r8a66597_type = 0x0000;
0714         break;
0715     }
0716 
0717     return r8a66597_type;
0718 }
0719 
0720 static u16 get_bufnum(u16 pipenum)
0721 {
0722     u16 bufnum = 0;
0723 
0724     if (pipenum == 0)
0725         bufnum = 0;
0726     else if (check_bulk_or_isoc(pipenum))
0727         bufnum = 8 + (pipenum - 1) * R8A66597_BUF_BSIZE*2;
0728     else if (check_interrupt(pipenum))
0729         bufnum = 4 + (pipenum - 6);
0730     else
0731         printk(KERN_ERR "r8a66597: Illegal pipenum (%d)\n", pipenum);
0732 
0733     return bufnum;
0734 }
0735 
0736 static u16 get_buf_bsize(u16 pipenum)
0737 {
0738     u16 buf_bsize = 0;
0739 
0740     if (pipenum == 0)
0741         buf_bsize = 3;
0742     else if (check_bulk_or_isoc(pipenum))
0743         buf_bsize = R8A66597_BUF_BSIZE - 1;
0744     else if (check_interrupt(pipenum))
0745         buf_bsize = 0;
0746     else
0747         printk(KERN_ERR "r8a66597: Illegal pipenum (%d)\n", pipenum);
0748 
0749     return buf_bsize;
0750 }
0751 
0752 /* this function must be called with interrupt disabled */
0753 static void enable_r8a66597_pipe_dma(struct r8a66597 *r8a66597,
0754                      struct r8a66597_device *dev,
0755                      struct r8a66597_pipe *pipe,
0756                      struct urb *urb)
0757 {
0758     int i;
0759     struct r8a66597_pipe_info *info = &pipe->info;
0760     unsigned short mbw = mbw_value(r8a66597);
0761 
0762     /* pipe dma is only for external controlles */
0763     if (r8a66597->pdata->on_chip)
0764         return;
0765 
0766     if ((pipe->info.pipenum != 0) && (info->type != R8A66597_INT)) {
0767         for (i = 0; i < R8A66597_MAX_DMA_CHANNEL; i++) {
0768             if ((r8a66597->dma_map & (1 << i)) != 0)
0769                 continue;
0770 
0771             dev_info(&dev->udev->dev,
0772                  "address %d, EndpointAddress 0x%02x use "
0773                  "DMA FIFO\n", usb_pipedevice(urb->pipe),
0774                  info->dir_in ?
0775                     USB_ENDPOINT_DIR_MASK + info->epnum
0776                     : info->epnum);
0777 
0778             r8a66597->dma_map |= 1 << i;
0779             dev->dma_map |= 1 << i;
0780             set_pipe_reg_addr(pipe, i);
0781 
0782             cfifo_change(r8a66597, 0);
0783             r8a66597_mdfy(r8a66597, mbw | pipe->info.pipenum,
0784                       mbw | CURPIPE, pipe->fifosel);
0785 
0786             r8a66597_reg_wait(r8a66597, pipe->fifosel, CURPIPE,
0787                       pipe->info.pipenum);
0788             r8a66597_bset(r8a66597, BCLR, pipe->fifoctr);
0789             break;
0790         }
0791     }
0792 }
0793 
0794 /* this function must be called with interrupt disabled */
0795 static void enable_r8a66597_pipe(struct r8a66597 *r8a66597, struct urb *urb,
0796                  struct usb_host_endpoint *hep,
0797                  struct r8a66597_pipe_info *info)
0798 {
0799     struct r8a66597_device *dev = get_urb_to_r8a66597_dev(r8a66597, urb);
0800     struct r8a66597_pipe *pipe = hep->hcpriv;
0801 
0802     dev_dbg(&dev->udev->dev, "enable_pipe:\n");
0803 
0804     pipe->info = *info;
0805     set_pipe_reg_addr(pipe, R8A66597_PIPE_NO_DMA);
0806     r8a66597->pipe_cnt[pipe->info.pipenum]++;
0807     dev->pipe_cnt[pipe->info.pipenum]++;
0808 
0809     enable_r8a66597_pipe_dma(r8a66597, dev, pipe, urb);
0810 }
0811 
0812 static void r8a66597_urb_done(struct r8a66597 *r8a66597, struct urb *urb,
0813                   int status)
0814 __releases(r8a66597->lock)
0815 __acquires(r8a66597->lock)
0816 {
0817     if (usb_pipein(urb->pipe) && usb_pipetype(urb->pipe) != PIPE_CONTROL) {
0818         void *ptr;
0819 
0820         for (ptr = urb->transfer_buffer;
0821              ptr < urb->transfer_buffer + urb->transfer_buffer_length;
0822              ptr += PAGE_SIZE)
0823             flush_dcache_page(virt_to_page(ptr));
0824     }
0825 
0826     usb_hcd_unlink_urb_from_ep(r8a66597_to_hcd(r8a66597), urb);
0827     spin_unlock(&r8a66597->lock);
0828     usb_hcd_giveback_urb(r8a66597_to_hcd(r8a66597), urb, status);
0829     spin_lock(&r8a66597->lock);
0830 }
0831 
0832 /* this function must be called with interrupt disabled */
0833 static void force_dequeue(struct r8a66597 *r8a66597, u16 pipenum, u16 address)
0834 {
0835     struct r8a66597_td *td, *next;
0836     struct urb *urb;
0837     struct list_head *list = &r8a66597->pipe_queue[pipenum];
0838 
0839     if (list_empty(list))
0840         return;
0841 
0842     list_for_each_entry_safe(td, next, list, queue) {
0843         if (td->address != address)
0844             continue;
0845 
0846         urb = td->urb;
0847         list_del(&td->queue);
0848         kfree(td);
0849 
0850         if (urb)
0851             r8a66597_urb_done(r8a66597, urb, -ENODEV);
0852 
0853         break;
0854     }
0855 }
0856 
0857 /* this function must be called with interrupt disabled */
0858 static void disable_r8a66597_pipe_all(struct r8a66597 *r8a66597,
0859                       struct r8a66597_device *dev)
0860 {
0861     int check_ep0 = 0;
0862     u16 pipenum;
0863 
0864     if (!dev)
0865         return;
0866 
0867     for (pipenum = 1; pipenum < R8A66597_MAX_NUM_PIPE; pipenum++) {
0868         if (!dev->pipe_cnt[pipenum])
0869             continue;
0870 
0871         if (!check_ep0) {
0872             check_ep0 = 1;
0873             force_dequeue(r8a66597, 0, dev->address);
0874         }
0875 
0876         r8a66597->pipe_cnt[pipenum] -= dev->pipe_cnt[pipenum];
0877         dev->pipe_cnt[pipenum] = 0;
0878         force_dequeue(r8a66597, pipenum, dev->address);
0879     }
0880 
0881     dev_dbg(&dev->udev->dev, "disable_pipe\n");
0882 
0883     r8a66597->dma_map &= ~(dev->dma_map);
0884     dev->dma_map = 0;
0885 }
0886 
0887 static u16 get_interval(struct urb *urb, __u8 interval)
0888 {
0889     u16 time = 1;
0890     int i;
0891 
0892     if (urb->dev->speed == USB_SPEED_HIGH) {
0893         if (interval > IITV)
0894             time = IITV;
0895         else
0896             time = interval ? interval - 1 : 0;
0897     } else {
0898         if (interval > 128) {
0899             time = IITV;
0900         } else {
0901             /* calculate the nearest value for PIPEPERI */
0902             for (i = 0; i < 7; i++) {
0903                 if ((1 << i) < interval &&
0904                     (1 << (i + 1) > interval))
0905                     time = 1 << i;
0906             }
0907         }
0908     }
0909 
0910     return time;
0911 }
0912 
0913 static unsigned long get_timer_interval(struct urb *urb, __u8 interval)
0914 {
0915     __u8 i;
0916     unsigned long time = 1;
0917 
0918     if (usb_pipeisoc(urb->pipe))
0919         return 0;
0920 
0921     if (get_r8a66597_usb_speed(urb->dev->speed) == HSMODE) {
0922         for (i = 0; i < (interval - 1); i++)
0923             time *= 2;
0924         time = time * 125 / 1000;   /* uSOF -> msec */
0925     } else {
0926         time = interval;
0927     }
0928 
0929     return time;
0930 }
0931 
0932 /* this function must be called with interrupt disabled */
0933 static void init_pipe_info(struct r8a66597 *r8a66597, struct urb *urb,
0934                struct usb_host_endpoint *hep,
0935                struct usb_endpoint_descriptor *ep)
0936 {
0937     struct r8a66597_pipe_info info;
0938 
0939     info.pipenum = get_empty_pipenum(r8a66597, ep);
0940     info.address = get_urb_to_r8a66597_addr(r8a66597, urb);
0941     info.epnum = usb_endpoint_num(ep);
0942     info.maxpacket = usb_endpoint_maxp(ep);
0943     info.type = get_r8a66597_type(usb_endpoint_type(ep));
0944     info.bufnum = get_bufnum(info.pipenum);
0945     info.buf_bsize = get_buf_bsize(info.pipenum);
0946     if (info.type == R8A66597_BULK) {
0947         info.interval = 0;
0948         info.timer_interval = 0;
0949     } else {
0950         info.interval = get_interval(urb, ep->bInterval);
0951         info.timer_interval = get_timer_interval(urb, ep->bInterval);
0952     }
0953     if (usb_endpoint_dir_in(ep))
0954         info.dir_in = 1;
0955     else
0956         info.dir_in = 0;
0957 
0958     enable_r8a66597_pipe(r8a66597, urb, hep, &info);
0959 }
0960 
0961 static void init_pipe_config(struct r8a66597 *r8a66597, struct urb *urb)
0962 {
0963     struct r8a66597_device *dev;
0964 
0965     dev = get_urb_to_r8a66597_dev(r8a66597, urb);
0966     dev->state = USB_STATE_CONFIGURED;
0967 }
0968 
0969 static void pipe_irq_enable(struct r8a66597 *r8a66597, struct urb *urb,
0970                 u16 pipenum)
0971 {
0972     if (pipenum == 0 && usb_pipeout(urb->pipe))
0973         enable_irq_empty(r8a66597, pipenum);
0974     else
0975         enable_irq_ready(r8a66597, pipenum);
0976 
0977     if (!usb_pipeisoc(urb->pipe))
0978         enable_irq_nrdy(r8a66597, pipenum);
0979 }
0980 
0981 static void pipe_irq_disable(struct r8a66597 *r8a66597, u16 pipenum)
0982 {
0983     disable_irq_ready(r8a66597, pipenum);
0984     disable_irq_nrdy(r8a66597, pipenum);
0985 }
0986 
0987 static void r8a66597_root_hub_start_polling(struct r8a66597 *r8a66597)
0988 {
0989     mod_timer(&r8a66597->rh_timer,
0990             jiffies + msecs_to_jiffies(R8A66597_RH_POLL_TIME));
0991 }
0992 
0993 static void start_root_hub_sampling(struct r8a66597 *r8a66597, int port,
0994                     int connect)
0995 {
0996     struct r8a66597_root_hub *rh = &r8a66597->root_hub[port];
0997 
0998     rh->old_syssts = r8a66597_read(r8a66597, get_syssts_reg(port)) & LNST;
0999     rh->scount = R8A66597_MAX_SAMPLING;
1000     if (connect)
1001         rh->port |= USB_PORT_STAT_CONNECTION;
1002     else
1003         rh->port &= ~USB_PORT_STAT_CONNECTION;
1004     rh->port |= USB_PORT_STAT_C_CONNECTION << 16;
1005 
1006     r8a66597_root_hub_start_polling(r8a66597);
1007 }
1008 
1009 /* this function must be called with interrupt disabled */
1010 static void r8a66597_check_syssts(struct r8a66597 *r8a66597, int port,
1011                     u16 syssts)
1012 __releases(r8a66597->lock)
1013 __acquires(r8a66597->lock)
1014 {
1015     if (syssts == SE0) {
1016         r8a66597_write(r8a66597, ~ATTCH, get_intsts_reg(port));
1017         r8a66597_bset(r8a66597, ATTCHE, get_intenb_reg(port));
1018     } else {
1019         if (syssts == FS_JSTS)
1020             r8a66597_bset(r8a66597, HSE, get_syscfg_reg(port));
1021         else if (syssts == LS_JSTS)
1022             r8a66597_bclr(r8a66597, HSE, get_syscfg_reg(port));
1023 
1024         r8a66597_write(r8a66597, ~DTCH, get_intsts_reg(port));
1025         r8a66597_bset(r8a66597, DTCHE, get_intenb_reg(port));
1026 
1027         if (r8a66597->bus_suspended)
1028             usb_hcd_resume_root_hub(r8a66597_to_hcd(r8a66597));
1029     }
1030 
1031     spin_unlock(&r8a66597->lock);
1032     usb_hcd_poll_rh_status(r8a66597_to_hcd(r8a66597));
1033     spin_lock(&r8a66597->lock);
1034 }
1035 
1036 /* this function must be called with interrupt disabled */
1037 static void r8a66597_usb_connect(struct r8a66597 *r8a66597, int port)
1038 {
1039     u16 speed = get_rh_usb_speed(r8a66597, port);
1040     struct r8a66597_root_hub *rh = &r8a66597->root_hub[port];
1041 
1042     rh->port &= ~(USB_PORT_STAT_HIGH_SPEED | USB_PORT_STAT_LOW_SPEED);
1043     if (speed == HSMODE)
1044         rh->port |= USB_PORT_STAT_HIGH_SPEED;
1045     else if (speed == LSMODE)
1046         rh->port |= USB_PORT_STAT_LOW_SPEED;
1047 
1048     rh->port &= ~USB_PORT_STAT_RESET;
1049     rh->port |= USB_PORT_STAT_ENABLE;
1050 }
1051 
1052 /* this function must be called with interrupt disabled */
1053 static void r8a66597_usb_disconnect(struct r8a66597 *r8a66597, int port)
1054 {
1055     struct r8a66597_device *dev = r8a66597->root_hub[port].dev;
1056 
1057     disable_r8a66597_pipe_all(r8a66597, dev);
1058     free_usb_address(r8a66597, dev, 0);
1059 
1060     start_root_hub_sampling(r8a66597, port, 0);
1061 }
1062 
1063 /* this function must be called with interrupt disabled */
1064 static void prepare_setup_packet(struct r8a66597 *r8a66597,
1065                  struct r8a66597_td *td)
1066 {
1067     int i;
1068     __le16 *p = (__le16 *)td->urb->setup_packet;
1069     unsigned long setup_addr = USBREQ;
1070 
1071     r8a66597_write(r8a66597, make_devsel(td->address) | td->maxpacket,
1072                DCPMAXP);
1073     r8a66597_write(r8a66597, ~(SIGN | SACK), INTSTS1);
1074 
1075     for (i = 0; i < 4; i++) {
1076         r8a66597_write(r8a66597, le16_to_cpu(p[i]), setup_addr);
1077         setup_addr += 2;
1078     }
1079     r8a66597_write(r8a66597, SUREQ, DCPCTR);
1080 }
1081 
1082 /* this function must be called with interrupt disabled */
1083 static void prepare_packet_read(struct r8a66597 *r8a66597,
1084                 struct r8a66597_td *td)
1085 {
1086     struct urb *urb = td->urb;
1087 
1088     if (usb_pipecontrol(urb->pipe)) {
1089         r8a66597_bclr(r8a66597, R8A66597_DIR, DCPCFG);
1090         r8a66597_mdfy(r8a66597, 0, ISEL | CURPIPE, CFIFOSEL);
1091         r8a66597_reg_wait(r8a66597, CFIFOSEL, CURPIPE, 0);
1092         if (urb->actual_length == 0) {
1093             r8a66597_pipe_toggle(r8a66597, td->pipe, 1);
1094             r8a66597_write(r8a66597, BCLR, CFIFOCTR);
1095         }
1096         pipe_irq_disable(r8a66597, td->pipenum);
1097         pipe_start(r8a66597, td->pipe);
1098         pipe_irq_enable(r8a66597, urb, td->pipenum);
1099     } else {
1100         if (urb->actual_length == 0) {
1101             pipe_irq_disable(r8a66597, td->pipenum);
1102             pipe_setting(r8a66597, td);
1103             pipe_stop(r8a66597, td->pipe);
1104             r8a66597_write(r8a66597, ~(1 << td->pipenum), BRDYSTS);
1105 
1106             if (td->pipe->pipetre) {
1107                 r8a66597_write(r8a66597, TRCLR,
1108                         td->pipe->pipetre);
1109                 r8a66597_write(r8a66597,
1110                         DIV_ROUND_UP
1111                           (urb->transfer_buffer_length,
1112                            td->maxpacket),
1113                         td->pipe->pipetrn);
1114                 r8a66597_bset(r8a66597, TRENB,
1115                         td->pipe->pipetre);
1116             }
1117 
1118             pipe_start(r8a66597, td->pipe);
1119             pipe_irq_enable(r8a66597, urb, td->pipenum);
1120         }
1121     }
1122 }
1123 
1124 /* this function must be called with interrupt disabled */
1125 static void prepare_packet_write(struct r8a66597 *r8a66597,
1126                  struct r8a66597_td *td)
1127 {
1128     u16 tmp;
1129     struct urb *urb = td->urb;
1130 
1131     if (usb_pipecontrol(urb->pipe)) {
1132         pipe_stop(r8a66597, td->pipe);
1133         r8a66597_bset(r8a66597, R8A66597_DIR, DCPCFG);
1134         r8a66597_mdfy(r8a66597, ISEL, ISEL | CURPIPE, CFIFOSEL);
1135         r8a66597_reg_wait(r8a66597, CFIFOSEL, CURPIPE, 0);
1136         if (urb->actual_length == 0) {
1137             r8a66597_pipe_toggle(r8a66597, td->pipe, 1);
1138             r8a66597_write(r8a66597, BCLR, CFIFOCTR);
1139         }
1140     } else {
1141         if (urb->actual_length == 0)
1142             pipe_setting(r8a66597, td);
1143         if (td->pipe->pipetre)
1144             r8a66597_bclr(r8a66597, TRENB, td->pipe->pipetre);
1145     }
1146     r8a66597_write(r8a66597, ~(1 << td->pipenum), BRDYSTS);
1147 
1148     fifo_change_from_pipe(r8a66597, td->pipe);
1149     tmp = r8a66597_read(r8a66597, td->pipe->fifoctr);
1150     if (unlikely((tmp & FRDY) == 0))
1151         pipe_irq_enable(r8a66597, urb, td->pipenum);
1152     else
1153         packet_write(r8a66597, td->pipenum);
1154     pipe_start(r8a66597, td->pipe);
1155 }
1156 
1157 /* this function must be called with interrupt disabled */
1158 static void prepare_status_packet(struct r8a66597 *r8a66597,
1159                   struct r8a66597_td *td)
1160 {
1161     struct urb *urb = td->urb;
1162 
1163     r8a66597_pipe_toggle(r8a66597, td->pipe, 1);
1164     pipe_stop(r8a66597, td->pipe);
1165 
1166     if (urb->setup_packet[0] & USB_ENDPOINT_DIR_MASK) {
1167         r8a66597_bset(r8a66597, R8A66597_DIR, DCPCFG);
1168         r8a66597_mdfy(r8a66597, ISEL, ISEL | CURPIPE, CFIFOSEL);
1169         r8a66597_reg_wait(r8a66597, CFIFOSEL, CURPIPE, 0);
1170         r8a66597_write(r8a66597, ~BEMP0, BEMPSTS);
1171         r8a66597_write(r8a66597, BCLR | BVAL, CFIFOCTR);
1172         enable_irq_empty(r8a66597, 0);
1173     } else {
1174         r8a66597_bclr(r8a66597, R8A66597_DIR, DCPCFG);
1175         r8a66597_mdfy(r8a66597, 0, ISEL | CURPIPE, CFIFOSEL);
1176         r8a66597_reg_wait(r8a66597, CFIFOSEL, CURPIPE, 0);
1177         r8a66597_write(r8a66597, BCLR, CFIFOCTR);
1178         enable_irq_ready(r8a66597, 0);
1179     }
1180     enable_irq_nrdy(r8a66597, 0);
1181     pipe_start(r8a66597, td->pipe);
1182 }
1183 
1184 static int is_set_address(unsigned char *setup_packet)
1185 {
1186     if (((setup_packet[0] & USB_TYPE_MASK) == USB_TYPE_STANDARD) &&
1187             setup_packet[1] == USB_REQ_SET_ADDRESS)
1188         return 1;
1189     else
1190         return 0;
1191 }
1192 
1193 /* this function must be called with interrupt disabled */
1194 static int start_transfer(struct r8a66597 *r8a66597, struct r8a66597_td *td)
1195 {
1196     BUG_ON(!td);
1197 
1198     switch (td->type) {
1199     case USB_PID_SETUP:
1200         if (is_set_address(td->urb->setup_packet)) {
1201             td->set_address = 1;
1202             td->urb->setup_packet[2] = alloc_usb_address(r8a66597,
1203                                      td->urb);
1204             if (td->urb->setup_packet[2] == 0)
1205                 return -EPIPE;
1206         }
1207         prepare_setup_packet(r8a66597, td);
1208         break;
1209     case USB_PID_IN:
1210         prepare_packet_read(r8a66597, td);
1211         break;
1212     case USB_PID_OUT:
1213         prepare_packet_write(r8a66597, td);
1214         break;
1215     case USB_PID_ACK:
1216         prepare_status_packet(r8a66597, td);
1217         break;
1218     default:
1219         printk(KERN_ERR "r8a66597: invalid type.\n");
1220         break;
1221     }
1222 
1223     return 0;
1224 }
1225 
1226 static int check_transfer_finish(struct r8a66597_td *td, struct urb *urb)
1227 {
1228     if (usb_pipeisoc(urb->pipe)) {
1229         if (urb->number_of_packets == td->iso_cnt)
1230             return 1;
1231     }
1232 
1233     /* control or bulk or interrupt */
1234     if ((urb->transfer_buffer_length <= urb->actual_length) ||
1235         (td->short_packet) || (td->zero_packet))
1236         return 1;
1237 
1238     return 0;
1239 }
1240 
1241 /* this function must be called with interrupt disabled */
1242 static void set_td_timer(struct r8a66597 *r8a66597, struct r8a66597_td *td)
1243 {
1244     unsigned long time;
1245 
1246     BUG_ON(!td);
1247 
1248     if (!list_empty(&r8a66597->pipe_queue[td->pipenum]) &&
1249         !usb_pipecontrol(td->urb->pipe) && usb_pipein(td->urb->pipe)) {
1250         r8a66597->timeout_map |= 1 << td->pipenum;
1251         switch (usb_pipetype(td->urb->pipe)) {
1252         case PIPE_INTERRUPT:
1253         case PIPE_ISOCHRONOUS:
1254             time = 30;
1255             break;
1256         default:
1257             time = 50;
1258             break;
1259         }
1260 
1261         mod_timer(&r8a66597->timers[td->pipenum].td,
1262               jiffies + msecs_to_jiffies(time));
1263     }
1264 }
1265 
1266 /* this function must be called with interrupt disabled */
1267 static void finish_request(struct r8a66597 *r8a66597, struct r8a66597_td *td,
1268         u16 pipenum, struct urb *urb, int status)
1269 __releases(r8a66597->lock) __acquires(r8a66597->lock)
1270 {
1271     int restart = 0;
1272     struct usb_hcd *hcd = r8a66597_to_hcd(r8a66597);
1273 
1274     r8a66597->timeout_map &= ~(1 << pipenum);
1275 
1276     if (likely(td)) {
1277         if (td->set_address && (status != 0 || urb->unlinked))
1278             r8a66597->address_map &= ~(1 << urb->setup_packet[2]);
1279 
1280         pipe_toggle_save(r8a66597, td->pipe, urb);
1281         list_del(&td->queue);
1282         kfree(td);
1283     }
1284 
1285     if (!list_empty(&r8a66597->pipe_queue[pipenum]))
1286         restart = 1;
1287 
1288     if (likely(urb)) {
1289         if (usb_pipeisoc(urb->pipe))
1290             urb->start_frame = r8a66597_get_frame(hcd);
1291 
1292         r8a66597_urb_done(r8a66597, urb, status);
1293     }
1294 
1295     if (restart) {
1296         td = r8a66597_get_td(r8a66597, pipenum);
1297         if (unlikely(!td))
1298             return;
1299 
1300         start_transfer(r8a66597, td);
1301         set_td_timer(r8a66597, td);
1302     }
1303 }
1304 
1305 static void packet_read(struct r8a66597 *r8a66597, u16 pipenum)
1306 {
1307     u16 tmp;
1308     int rcv_len, bufsize, urb_len, size;
1309     u16 *buf;
1310     struct r8a66597_td *td = r8a66597_get_td(r8a66597, pipenum);
1311     struct urb *urb;
1312     int finish = 0;
1313     int status = 0;
1314 
1315     if (unlikely(!td))
1316         return;
1317     urb = td->urb;
1318 
1319     fifo_change_from_pipe(r8a66597, td->pipe);
1320     tmp = r8a66597_read(r8a66597, td->pipe->fifoctr);
1321     if (unlikely((tmp & FRDY) == 0)) {
1322         pipe_stop(r8a66597, td->pipe);
1323         pipe_irq_disable(r8a66597, pipenum);
1324         printk(KERN_ERR "r8a66597: in fifo not ready (%d)\n", pipenum);
1325         finish_request(r8a66597, td, pipenum, td->urb, -EPIPE);
1326         return;
1327     }
1328 
1329     /* prepare parameters */
1330     rcv_len = tmp & DTLN;
1331     if (usb_pipeisoc(urb->pipe)) {
1332         buf = (u16 *)(urb->transfer_buffer +
1333                 urb->iso_frame_desc[td->iso_cnt].offset);
1334         urb_len = urb->iso_frame_desc[td->iso_cnt].length;
1335     } else {
1336         buf = (void *)urb->transfer_buffer + urb->actual_length;
1337         urb_len = urb->transfer_buffer_length - urb->actual_length;
1338     }
1339     bufsize = min(urb_len, (int) td->maxpacket);
1340     if (rcv_len <= bufsize) {
1341         size = rcv_len;
1342     } else {
1343         size = bufsize;
1344         status = -EOVERFLOW;
1345         finish = 1;
1346     }
1347 
1348     /* update parameters */
1349     urb->actual_length += size;
1350     if (rcv_len == 0)
1351         td->zero_packet = 1;
1352     if (rcv_len < bufsize) {
1353         td->short_packet = 1;
1354     }
1355     if (usb_pipeisoc(urb->pipe)) {
1356         urb->iso_frame_desc[td->iso_cnt].actual_length = size;
1357         urb->iso_frame_desc[td->iso_cnt].status = status;
1358         td->iso_cnt++;
1359         finish = 0;
1360     }
1361 
1362     /* check transfer finish */
1363     if (finish || check_transfer_finish(td, urb)) {
1364         pipe_stop(r8a66597, td->pipe);
1365         pipe_irq_disable(r8a66597, pipenum);
1366         finish = 1;
1367     }
1368 
1369     /* read fifo */
1370     if (urb->transfer_buffer) {
1371         if (size == 0)
1372             r8a66597_write(r8a66597, BCLR, td->pipe->fifoctr);
1373         else
1374             r8a66597_read_fifo(r8a66597, td->pipe->fifoaddr,
1375                        buf, size);
1376     }
1377 
1378     if (finish && pipenum != 0)
1379         finish_request(r8a66597, td, pipenum, urb, status);
1380 }
1381 
1382 static void packet_write(struct r8a66597 *r8a66597, u16 pipenum)
1383 {
1384     u16 tmp;
1385     int bufsize, size;
1386     u16 *buf;
1387     struct r8a66597_td *td = r8a66597_get_td(r8a66597, pipenum);
1388     struct urb *urb;
1389 
1390     if (unlikely(!td))
1391         return;
1392     urb = td->urb;
1393 
1394     fifo_change_from_pipe(r8a66597, td->pipe);
1395     tmp = r8a66597_read(r8a66597, td->pipe->fifoctr);
1396     if (unlikely((tmp & FRDY) == 0)) {
1397         pipe_stop(r8a66597, td->pipe);
1398         pipe_irq_disable(r8a66597, pipenum);
1399         printk(KERN_ERR "r8a66597: out fifo not ready (%d)\n", pipenum);
1400         finish_request(r8a66597, td, pipenum, urb, -EPIPE);
1401         return;
1402     }
1403 
1404     /* prepare parameters */
1405     bufsize = td->maxpacket;
1406     if (usb_pipeisoc(urb->pipe)) {
1407         buf = (u16 *)(urb->transfer_buffer +
1408                 urb->iso_frame_desc[td->iso_cnt].offset);
1409         size = min(bufsize,
1410                (int)urb->iso_frame_desc[td->iso_cnt].length);
1411     } else {
1412         buf = (u16 *)(urb->transfer_buffer + urb->actual_length);
1413         size = min_t(u32, bufsize,
1414                urb->transfer_buffer_length - urb->actual_length);
1415     }
1416 
1417     /* write fifo */
1418     if (pipenum > 0)
1419         r8a66597_write(r8a66597, ~(1 << pipenum), BEMPSTS);
1420     if (urb->transfer_buffer) {
1421         r8a66597_write_fifo(r8a66597, td->pipe, buf, size);
1422         if (!usb_pipebulk(urb->pipe) || td->maxpacket != size)
1423             r8a66597_write(r8a66597, BVAL, td->pipe->fifoctr);
1424     }
1425 
1426     /* update parameters */
1427     urb->actual_length += size;
1428     if (usb_pipeisoc(urb->pipe)) {
1429         urb->iso_frame_desc[td->iso_cnt].actual_length = size;
1430         urb->iso_frame_desc[td->iso_cnt].status = 0;
1431         td->iso_cnt++;
1432     }
1433 
1434     /* check transfer finish */
1435     if (check_transfer_finish(td, urb)) {
1436         disable_irq_ready(r8a66597, pipenum);
1437         enable_irq_empty(r8a66597, pipenum);
1438         if (!usb_pipeisoc(urb->pipe))
1439             enable_irq_nrdy(r8a66597, pipenum);
1440     } else
1441         pipe_irq_enable(r8a66597, urb, pipenum);
1442 }
1443 
1444 
1445 static void check_next_phase(struct r8a66597 *r8a66597, int status)
1446 {
1447     struct r8a66597_td *td = r8a66597_get_td(r8a66597, 0);
1448     struct urb *urb;
1449     u8 finish = 0;
1450 
1451     if (unlikely(!td))
1452         return;
1453     urb = td->urb;
1454 
1455     switch (td->type) {
1456     case USB_PID_IN:
1457     case USB_PID_OUT:
1458         if (check_transfer_finish(td, urb))
1459             td->type = USB_PID_ACK;
1460         break;
1461     case USB_PID_SETUP:
1462         if (urb->transfer_buffer_length == urb->actual_length)
1463             td->type = USB_PID_ACK;
1464         else if (usb_pipeout(urb->pipe))
1465             td->type = USB_PID_OUT;
1466         else
1467             td->type = USB_PID_IN;
1468         break;
1469     case USB_PID_ACK:
1470         finish = 1;
1471         break;
1472     }
1473 
1474     if (finish || status != 0 || urb->unlinked)
1475         finish_request(r8a66597, td, 0, urb, status);
1476     else
1477         start_transfer(r8a66597, td);
1478 }
1479 
1480 static int get_urb_error(struct r8a66597 *r8a66597, u16 pipenum)
1481 {
1482     struct r8a66597_td *td = r8a66597_get_td(r8a66597, pipenum);
1483 
1484     if (td) {
1485         u16 pid = r8a66597_read(r8a66597, td->pipe->pipectr) & PID;
1486 
1487         if (pid == PID_NAK)
1488             return -ECONNRESET;
1489         else
1490             return -EPIPE;
1491     }
1492     return 0;
1493 }
1494 
1495 static void irq_pipe_ready(struct r8a66597 *r8a66597)
1496 {
1497     u16 check;
1498     u16 pipenum;
1499     u16 mask;
1500     struct r8a66597_td *td;
1501 
1502     mask = r8a66597_read(r8a66597, BRDYSTS)
1503            & r8a66597_read(r8a66597, BRDYENB);
1504     r8a66597_write(r8a66597, ~mask, BRDYSTS);
1505     if (mask & BRDY0) {
1506         td = r8a66597_get_td(r8a66597, 0);
1507         if (td && td->type == USB_PID_IN)
1508             packet_read(r8a66597, 0);
1509         else
1510             pipe_irq_disable(r8a66597, 0);
1511         check_next_phase(r8a66597, 0);
1512     }
1513 
1514     for (pipenum = 1; pipenum < R8A66597_MAX_NUM_PIPE; pipenum++) {
1515         check = 1 << pipenum;
1516         if (mask & check) {
1517             td = r8a66597_get_td(r8a66597, pipenum);
1518             if (unlikely(!td))
1519                 continue;
1520 
1521             if (td->type == USB_PID_IN)
1522                 packet_read(r8a66597, pipenum);
1523             else if (td->type == USB_PID_OUT)
1524                 packet_write(r8a66597, pipenum);
1525         }
1526     }
1527 }
1528 
1529 static void irq_pipe_empty(struct r8a66597 *r8a66597)
1530 {
1531     u16 tmp;
1532     u16 check;
1533     u16 pipenum;
1534     u16 mask;
1535     struct r8a66597_td *td;
1536 
1537     mask = r8a66597_read(r8a66597, BEMPSTS)
1538            & r8a66597_read(r8a66597, BEMPENB);
1539     r8a66597_write(r8a66597, ~mask, BEMPSTS);
1540     if (mask & BEMP0) {
1541         cfifo_change(r8a66597, 0);
1542         td = r8a66597_get_td(r8a66597, 0);
1543         if (td && td->type != USB_PID_OUT)
1544             disable_irq_empty(r8a66597, 0);
1545         check_next_phase(r8a66597, 0);
1546     }
1547 
1548     for (pipenum = 1; pipenum < R8A66597_MAX_NUM_PIPE; pipenum++) {
1549         check = 1 << pipenum;
1550         if (mask &  check) {
1551             struct r8a66597_td *td;
1552             td = r8a66597_get_td(r8a66597, pipenum);
1553             if (unlikely(!td))
1554                 continue;
1555 
1556             tmp = r8a66597_read(r8a66597, td->pipe->pipectr);
1557             if ((tmp & INBUFM) == 0) {
1558                 disable_irq_empty(r8a66597, pipenum);
1559                 pipe_irq_disable(r8a66597, pipenum);
1560                 finish_request(r8a66597, td, pipenum, td->urb,
1561                         0);
1562             }
1563         }
1564     }
1565 }
1566 
1567 static void irq_pipe_nrdy(struct r8a66597 *r8a66597)
1568 {
1569     u16 check;
1570     u16 pipenum;
1571     u16 mask;
1572     int status;
1573 
1574     mask = r8a66597_read(r8a66597, NRDYSTS)
1575            & r8a66597_read(r8a66597, NRDYENB);
1576     r8a66597_write(r8a66597, ~mask, NRDYSTS);
1577     if (mask & NRDY0) {
1578         cfifo_change(r8a66597, 0);
1579         status = get_urb_error(r8a66597, 0);
1580         pipe_irq_disable(r8a66597, 0);
1581         check_next_phase(r8a66597, status);
1582     }
1583 
1584     for (pipenum = 1; pipenum < R8A66597_MAX_NUM_PIPE; pipenum++) {
1585         check = 1 << pipenum;
1586         if (mask & check) {
1587             struct r8a66597_td *td;
1588             td = r8a66597_get_td(r8a66597, pipenum);
1589             if (unlikely(!td))
1590                 continue;
1591 
1592             status = get_urb_error(r8a66597, pipenum);
1593             pipe_irq_disable(r8a66597, pipenum);
1594             pipe_stop(r8a66597, td->pipe);
1595             finish_request(r8a66597, td, pipenum, td->urb, status);
1596         }
1597     }
1598 }
1599 
1600 static irqreturn_t r8a66597_irq(struct usb_hcd *hcd)
1601 {
1602     struct r8a66597 *r8a66597 = hcd_to_r8a66597(hcd);
1603     u16 intsts0, intsts1, intsts2;
1604     u16 intenb0, intenb1, intenb2;
1605     u16 mask0, mask1, mask2;
1606     int status;
1607 
1608     spin_lock(&r8a66597->lock);
1609 
1610     intsts0 = r8a66597_read(r8a66597, INTSTS0);
1611     intsts1 = r8a66597_read(r8a66597, INTSTS1);
1612     intsts2 = r8a66597_read(r8a66597, INTSTS2);
1613     intenb0 = r8a66597_read(r8a66597, INTENB0);
1614     intenb1 = r8a66597_read(r8a66597, INTENB1);
1615     intenb2 = r8a66597_read(r8a66597, INTENB2);
1616 
1617     mask2 = intsts2 & intenb2;
1618     mask1 = intsts1 & intenb1;
1619     mask0 = intsts0 & intenb0 & (BEMP | NRDY | BRDY);
1620     if (mask2) {
1621         if (mask2 & ATTCH) {
1622             r8a66597_write(r8a66597, ~ATTCH, INTSTS2);
1623             r8a66597_bclr(r8a66597, ATTCHE, INTENB2);
1624 
1625             /* start usb bus sampling */
1626             start_root_hub_sampling(r8a66597, 1, 1);
1627         }
1628         if (mask2 & DTCH) {
1629             r8a66597_write(r8a66597, ~DTCH, INTSTS2);
1630             r8a66597_bclr(r8a66597, DTCHE, INTENB2);
1631             r8a66597_usb_disconnect(r8a66597, 1);
1632         }
1633         if (mask2 & BCHG) {
1634             r8a66597_write(r8a66597, ~BCHG, INTSTS2);
1635             r8a66597_bclr(r8a66597, BCHGE, INTENB2);
1636             usb_hcd_resume_root_hub(r8a66597_to_hcd(r8a66597));
1637         }
1638     }
1639 
1640     if (mask1) {
1641         if (mask1 & ATTCH) {
1642             r8a66597_write(r8a66597, ~ATTCH, INTSTS1);
1643             r8a66597_bclr(r8a66597, ATTCHE, INTENB1);
1644 
1645             /* start usb bus sampling */
1646             start_root_hub_sampling(r8a66597, 0, 1);
1647         }
1648         if (mask1 & DTCH) {
1649             r8a66597_write(r8a66597, ~DTCH, INTSTS1);
1650             r8a66597_bclr(r8a66597, DTCHE, INTENB1);
1651             r8a66597_usb_disconnect(r8a66597, 0);
1652         }
1653         if (mask1 & BCHG) {
1654             r8a66597_write(r8a66597, ~BCHG, INTSTS1);
1655             r8a66597_bclr(r8a66597, BCHGE, INTENB1);
1656             usb_hcd_resume_root_hub(r8a66597_to_hcd(r8a66597));
1657         }
1658 
1659         if (mask1 & SIGN) {
1660             r8a66597_write(r8a66597, ~SIGN, INTSTS1);
1661             status = get_urb_error(r8a66597, 0);
1662             check_next_phase(r8a66597, status);
1663         }
1664         if (mask1 & SACK) {
1665             r8a66597_write(r8a66597, ~SACK, INTSTS1);
1666             check_next_phase(r8a66597, 0);
1667         }
1668     }
1669     if (mask0) {
1670         if (mask0 & BRDY)
1671             irq_pipe_ready(r8a66597);
1672         if (mask0 & BEMP)
1673             irq_pipe_empty(r8a66597);
1674         if (mask0 & NRDY)
1675             irq_pipe_nrdy(r8a66597);
1676     }
1677 
1678     spin_unlock(&r8a66597->lock);
1679     return IRQ_HANDLED;
1680 }
1681 
1682 /* this function must be called with interrupt disabled */
1683 static void r8a66597_root_hub_control(struct r8a66597 *r8a66597, int port)
1684 {
1685     u16 tmp;
1686     struct r8a66597_root_hub *rh = &r8a66597->root_hub[port];
1687 
1688     if (rh->port & USB_PORT_STAT_RESET) {
1689         unsigned long dvstctr_reg = get_dvstctr_reg(port);
1690 
1691         tmp = r8a66597_read(r8a66597, dvstctr_reg);
1692         if ((tmp & USBRST) == USBRST) {
1693             r8a66597_mdfy(r8a66597, UACT, USBRST | UACT,
1694                       dvstctr_reg);
1695             r8a66597_root_hub_start_polling(r8a66597);
1696         } else
1697             r8a66597_usb_connect(r8a66597, port);
1698     }
1699 
1700     if (!(rh->port & USB_PORT_STAT_CONNECTION)) {
1701         r8a66597_write(r8a66597, ~ATTCH, get_intsts_reg(port));
1702         r8a66597_bset(r8a66597, ATTCHE, get_intenb_reg(port));
1703     }
1704 
1705     if (rh->scount > 0) {
1706         tmp = r8a66597_read(r8a66597, get_syssts_reg(port)) & LNST;
1707         if (tmp == rh->old_syssts) {
1708             rh->scount--;
1709             if (rh->scount == 0)
1710                 r8a66597_check_syssts(r8a66597, port, tmp);
1711             else
1712                 r8a66597_root_hub_start_polling(r8a66597);
1713         } else {
1714             rh->scount = R8A66597_MAX_SAMPLING;
1715             rh->old_syssts = tmp;
1716             r8a66597_root_hub_start_polling(r8a66597);
1717         }
1718     }
1719 }
1720 
1721 static void r8a66597_interval_timer(struct timer_list *t)
1722 {
1723     struct r8a66597_timers *timers = from_timer(timers, t, interval);
1724     struct r8a66597 *r8a66597 = timers->r8a66597;
1725     unsigned long flags;
1726     u16 pipenum;
1727     struct r8a66597_td *td;
1728 
1729     spin_lock_irqsave(&r8a66597->lock, flags);
1730 
1731     for (pipenum = 0; pipenum < R8A66597_MAX_NUM_PIPE; pipenum++) {
1732         if (!(r8a66597->interval_map & (1 << pipenum)))
1733             continue;
1734         if (timer_pending(&r8a66597->timers[pipenum].interval))
1735             continue;
1736 
1737         td = r8a66597_get_td(r8a66597, pipenum);
1738         if (td)
1739             start_transfer(r8a66597, td);
1740     }
1741 
1742     spin_unlock_irqrestore(&r8a66597->lock, flags);
1743 }
1744 
1745 static void r8a66597_td_timer(struct timer_list *t)
1746 {
1747     struct r8a66597_timers *timers = from_timer(timers, t, td);
1748     struct r8a66597 *r8a66597 = timers->r8a66597;
1749     unsigned long flags;
1750     u16 pipenum;
1751     struct r8a66597_td *td, *new_td = NULL;
1752     struct r8a66597_pipe *pipe;
1753 
1754     spin_lock_irqsave(&r8a66597->lock, flags);
1755     for (pipenum = 0; pipenum < R8A66597_MAX_NUM_PIPE; pipenum++) {
1756         if (!(r8a66597->timeout_map & (1 << pipenum)))
1757             continue;
1758         if (timer_pending(&r8a66597->timers[pipenum].td))
1759             continue;
1760 
1761         td = r8a66597_get_td(r8a66597, pipenum);
1762         if (!td) {
1763             r8a66597->timeout_map &= ~(1 << pipenum);
1764             continue;
1765         }
1766 
1767         if (td->urb->actual_length) {
1768             set_td_timer(r8a66597, td);
1769             break;
1770         }
1771 
1772         pipe = td->pipe;
1773         pipe_stop(r8a66597, pipe);
1774 
1775         /* Select a different address or endpoint */
1776         new_td = td;
1777         do {
1778             list_move_tail(&new_td->queue,
1779                        &r8a66597->pipe_queue[pipenum]);
1780             new_td = r8a66597_get_td(r8a66597, pipenum);
1781             if (!new_td) {
1782                 new_td = td;
1783                 break;
1784             }
1785         } while (td != new_td && td->address == new_td->address &&
1786             td->pipe->info.epnum == new_td->pipe->info.epnum);
1787 
1788         start_transfer(r8a66597, new_td);
1789 
1790         if (td == new_td)
1791             r8a66597->timeout_map &= ~(1 << pipenum);
1792         else
1793             set_td_timer(r8a66597, new_td);
1794         break;
1795     }
1796     spin_unlock_irqrestore(&r8a66597->lock, flags);
1797 }
1798 
1799 static void r8a66597_timer(struct timer_list *t)
1800 {
1801     struct r8a66597 *r8a66597 = from_timer(r8a66597, t, rh_timer);
1802     unsigned long flags;
1803     int port;
1804 
1805     spin_lock_irqsave(&r8a66597->lock, flags);
1806 
1807     for (port = 0; port < r8a66597->max_root_hub; port++)
1808         r8a66597_root_hub_control(r8a66597, port);
1809 
1810     spin_unlock_irqrestore(&r8a66597->lock, flags);
1811 }
1812 
1813 static int check_pipe_config(struct r8a66597 *r8a66597, struct urb *urb)
1814 {
1815     struct r8a66597_device *dev = get_urb_to_r8a66597_dev(r8a66597, urb);
1816 
1817     if (dev && dev->address && dev->state != USB_STATE_CONFIGURED &&
1818         (urb->dev->state == USB_STATE_CONFIGURED))
1819         return 1;
1820     else
1821         return 0;
1822 }
1823 
1824 static int r8a66597_start(struct usb_hcd *hcd)
1825 {
1826     struct r8a66597 *r8a66597 = hcd_to_r8a66597(hcd);
1827 
1828     hcd->state = HC_STATE_RUNNING;
1829     return enable_controller(r8a66597);
1830 }
1831 
1832 static void r8a66597_stop(struct usb_hcd *hcd)
1833 {
1834     struct r8a66597 *r8a66597 = hcd_to_r8a66597(hcd);
1835 
1836     disable_controller(r8a66597);
1837 }
1838 
1839 static void set_address_zero(struct r8a66597 *r8a66597, struct urb *urb)
1840 {
1841     unsigned int usb_address = usb_pipedevice(urb->pipe);
1842     u16 root_port, hub_port;
1843 
1844     if (usb_address == 0) {
1845         get_port_number(r8a66597, urb->dev->devpath,
1846                 &root_port, &hub_port);
1847         set_devadd_reg(r8a66597, 0,
1848                    get_r8a66597_usb_speed(urb->dev->speed),
1849                    get_parent_r8a66597_address(r8a66597, urb->dev),
1850                    hub_port, root_port);
1851     }
1852 }
1853 
1854 static struct r8a66597_td *r8a66597_make_td(struct r8a66597 *r8a66597,
1855                         struct urb *urb,
1856                         struct usb_host_endpoint *hep)
1857 {
1858     struct r8a66597_td *td;
1859     u16 pipenum;
1860 
1861     td = kzalloc(sizeof(struct r8a66597_td), GFP_ATOMIC);
1862     if (td == NULL)
1863         return NULL;
1864 
1865     pipenum = r8a66597_get_pipenum(urb, hep);
1866     td->pipenum = pipenum;
1867     td->pipe = hep->hcpriv;
1868     td->urb = urb;
1869     td->address = get_urb_to_r8a66597_addr(r8a66597, urb);
1870     td->maxpacket = usb_maxpacket(urb->dev, urb->pipe);
1871     if (usb_pipecontrol(urb->pipe))
1872         td->type = USB_PID_SETUP;
1873     else if (usb_pipein(urb->pipe))
1874         td->type = USB_PID_IN;
1875     else
1876         td->type = USB_PID_OUT;
1877     INIT_LIST_HEAD(&td->queue);
1878 
1879     return td;
1880 }
1881 
1882 static int r8a66597_urb_enqueue(struct usb_hcd *hcd,
1883                 struct urb *urb,
1884                 gfp_t mem_flags)
1885 {
1886     struct usb_host_endpoint *hep = urb->ep;
1887     struct r8a66597 *r8a66597 = hcd_to_r8a66597(hcd);
1888     struct r8a66597_td *td = NULL;
1889     int ret, request = 0;
1890     unsigned long flags;
1891 
1892     spin_lock_irqsave(&r8a66597->lock, flags);
1893     if (!get_urb_to_r8a66597_dev(r8a66597, urb)) {
1894         ret = -ENODEV;
1895         goto error_not_linked;
1896     }
1897 
1898     ret = usb_hcd_link_urb_to_ep(hcd, urb);
1899     if (ret)
1900         goto error_not_linked;
1901 
1902     if (!hep->hcpriv) {
1903         hep->hcpriv = kzalloc(sizeof(struct r8a66597_pipe),
1904                 GFP_ATOMIC);
1905         if (!hep->hcpriv) {
1906             ret = -ENOMEM;
1907             goto error;
1908         }
1909         set_pipe_reg_addr(hep->hcpriv, R8A66597_PIPE_NO_DMA);
1910         if (usb_pipeendpoint(urb->pipe))
1911             init_pipe_info(r8a66597, urb, hep, &hep->desc);
1912     }
1913 
1914     if (unlikely(check_pipe_config(r8a66597, urb)))
1915         init_pipe_config(r8a66597, urb);
1916 
1917     set_address_zero(r8a66597, urb);
1918     td = r8a66597_make_td(r8a66597, urb, hep);
1919     if (td == NULL) {
1920         ret = -ENOMEM;
1921         goto error;
1922     }
1923     if (list_empty(&r8a66597->pipe_queue[td->pipenum]))
1924         request = 1;
1925     list_add_tail(&td->queue, &r8a66597->pipe_queue[td->pipenum]);
1926     urb->hcpriv = td;
1927 
1928     if (request) {
1929         if (td->pipe->info.timer_interval) {
1930             r8a66597->interval_map |= 1 << td->pipenum;
1931             mod_timer(&r8a66597->timers[td->pipenum].interval,
1932                   jiffies + msecs_to_jiffies(
1933                     td->pipe->info.timer_interval));
1934         } else {
1935             ret = start_transfer(r8a66597, td);
1936             if (ret < 0) {
1937                 list_del(&td->queue);
1938                 kfree(td);
1939             }
1940         }
1941     } else
1942         set_td_timer(r8a66597, td);
1943 
1944 error:
1945     if (ret)
1946         usb_hcd_unlink_urb_from_ep(hcd, urb);
1947 error_not_linked:
1948     spin_unlock_irqrestore(&r8a66597->lock, flags);
1949     return ret;
1950 }
1951 
1952 static int r8a66597_urb_dequeue(struct usb_hcd *hcd, struct urb *urb,
1953         int status)
1954 {
1955     struct r8a66597 *r8a66597 = hcd_to_r8a66597(hcd);
1956     struct r8a66597_td *td;
1957     unsigned long flags;
1958     int rc;
1959 
1960     spin_lock_irqsave(&r8a66597->lock, flags);
1961     rc = usb_hcd_check_unlink_urb(hcd, urb, status);
1962     if (rc)
1963         goto done;
1964 
1965     if (urb->hcpriv) {
1966         td = urb->hcpriv;
1967         pipe_stop(r8a66597, td->pipe);
1968         pipe_irq_disable(r8a66597, td->pipenum);
1969         disable_irq_empty(r8a66597, td->pipenum);
1970         finish_request(r8a66597, td, td->pipenum, urb, status);
1971     }
1972  done:
1973     spin_unlock_irqrestore(&r8a66597->lock, flags);
1974     return rc;
1975 }
1976 
1977 static void r8a66597_endpoint_disable(struct usb_hcd *hcd,
1978                       struct usb_host_endpoint *hep)
1979 __acquires(r8a66597->lock)
1980 __releases(r8a66597->lock)
1981 {
1982     struct r8a66597 *r8a66597 = hcd_to_r8a66597(hcd);
1983     struct r8a66597_pipe *pipe = (struct r8a66597_pipe *)hep->hcpriv;
1984     struct r8a66597_td *td;
1985     struct urb *urb = NULL;
1986     u16 pipenum;
1987     unsigned long flags;
1988 
1989     if (pipe == NULL)
1990         return;
1991     pipenum = pipe->info.pipenum;
1992 
1993     spin_lock_irqsave(&r8a66597->lock, flags);
1994     if (pipenum == 0) {
1995         kfree(hep->hcpriv);
1996         hep->hcpriv = NULL;
1997         spin_unlock_irqrestore(&r8a66597->lock, flags);
1998         return;
1999     }
2000 
2001     pipe_stop(r8a66597, pipe);
2002     pipe_irq_disable(r8a66597, pipenum);
2003     disable_irq_empty(r8a66597, pipenum);
2004     td = r8a66597_get_td(r8a66597, pipenum);
2005     if (td)
2006         urb = td->urb;
2007     finish_request(r8a66597, td, pipenum, urb, -ESHUTDOWN);
2008     kfree(hep->hcpriv);
2009     hep->hcpriv = NULL;
2010     spin_unlock_irqrestore(&r8a66597->lock, flags);
2011 }
2012 
2013 static int r8a66597_get_frame(struct usb_hcd *hcd)
2014 {
2015     struct r8a66597 *r8a66597 = hcd_to_r8a66597(hcd);
2016     return r8a66597_read(r8a66597, FRMNUM) & 0x03FF;
2017 }
2018 
2019 static void collect_usb_address_map(struct usb_device *udev, unsigned long *map)
2020 {
2021     int chix;
2022     struct usb_device *childdev;
2023 
2024     if (udev->state == USB_STATE_CONFIGURED &&
2025         udev->parent && udev->parent->devnum > 1 &&
2026         udev->parent->descriptor.bDeviceClass == USB_CLASS_HUB)
2027         map[udev->devnum/32] |= (1 << (udev->devnum % 32));
2028 
2029     usb_hub_for_each_child(udev, chix, childdev)
2030         collect_usb_address_map(childdev, map);
2031 }
2032 
2033 /* this function must be called with interrupt disabled */
2034 static struct r8a66597_device *get_r8a66597_device(struct r8a66597 *r8a66597,
2035                            int addr)
2036 {
2037     struct r8a66597_device *dev;
2038     struct list_head *list = &r8a66597->child_device;
2039 
2040     list_for_each_entry(dev, list, device_list) {
2041         if (dev->usb_address != addr)
2042             continue;
2043 
2044         return dev;
2045     }
2046 
2047     printk(KERN_ERR "r8a66597: get_r8a66597_device fail.(%d)\n", addr);
2048     return NULL;
2049 }
2050 
2051 static void update_usb_address_map(struct r8a66597 *r8a66597,
2052                    struct usb_device *root_hub,
2053                    unsigned long *map)
2054 {
2055     int i, j, addr;
2056     unsigned long diff;
2057     unsigned long flags;
2058 
2059     for (i = 0; i < 4; i++) {
2060         diff = r8a66597->child_connect_map[i] ^ map[i];
2061         if (!diff)
2062             continue;
2063 
2064         for (j = 0; j < 32; j++) {
2065             if (!(diff & (1 << j)))
2066                 continue;
2067 
2068             addr = i * 32 + j;
2069             if (map[i] & (1 << j))
2070                 set_child_connect_map(r8a66597, addr);
2071             else {
2072                 struct r8a66597_device *dev;
2073 
2074                 spin_lock_irqsave(&r8a66597->lock, flags);
2075                 dev = get_r8a66597_device(r8a66597, addr);
2076                 disable_r8a66597_pipe_all(r8a66597, dev);
2077                 free_usb_address(r8a66597, dev, 0);
2078                 put_child_connect_map(r8a66597, addr);
2079                 spin_unlock_irqrestore(&r8a66597->lock, flags);
2080             }
2081         }
2082     }
2083 }
2084 
2085 static void r8a66597_check_detect_child(struct r8a66597 *r8a66597,
2086                     struct usb_hcd *hcd)
2087 {
2088     struct usb_bus *bus;
2089     unsigned long now_map[4];
2090 
2091     memset(now_map, 0, sizeof(now_map));
2092 
2093     mutex_lock(&usb_bus_idr_lock);
2094     bus = idr_find(&usb_bus_idr, hcd->self.busnum);
2095     if (bus && bus->root_hub) {
2096         collect_usb_address_map(bus->root_hub, now_map);
2097         update_usb_address_map(r8a66597, bus->root_hub, now_map);
2098     }
2099     mutex_unlock(&usb_bus_idr_lock);
2100 }
2101 
2102 static int r8a66597_hub_status_data(struct usb_hcd *hcd, char *buf)
2103 {
2104     struct r8a66597 *r8a66597 = hcd_to_r8a66597(hcd);
2105     unsigned long flags;
2106     int i;
2107 
2108     r8a66597_check_detect_child(r8a66597, hcd);
2109 
2110     spin_lock_irqsave(&r8a66597->lock, flags);
2111 
2112     *buf = 0;   /* initialize (no change) */
2113 
2114     for (i = 0; i < r8a66597->max_root_hub; i++) {
2115         if (r8a66597->root_hub[i].port & 0xffff0000)
2116             *buf |= 1 << (i + 1);
2117     }
2118 
2119     spin_unlock_irqrestore(&r8a66597->lock, flags);
2120 
2121     return (*buf != 0);
2122 }
2123 
2124 static void r8a66597_hub_descriptor(struct r8a66597 *r8a66597,
2125                     struct usb_hub_descriptor *desc)
2126 {
2127     desc->bDescriptorType = USB_DT_HUB;
2128     desc->bHubContrCurrent = 0;
2129     desc->bNbrPorts = r8a66597->max_root_hub;
2130     desc->bDescLength = 9;
2131     desc->bPwrOn2PwrGood = 0;
2132     desc->wHubCharacteristics =
2133         cpu_to_le16(HUB_CHAR_INDV_PORT_LPSM | HUB_CHAR_NO_OCPM);
2134     desc->u.hs.DeviceRemovable[0] =
2135         ((1 << r8a66597->max_root_hub) - 1) << 1;
2136     desc->u.hs.DeviceRemovable[1] = ~0;
2137 }
2138 
2139 static int r8a66597_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
2140                 u16 wIndex, char *buf, u16 wLength)
2141 {
2142     struct r8a66597 *r8a66597 = hcd_to_r8a66597(hcd);
2143     int ret;
2144     int port = (wIndex & 0x00FF) - 1;
2145     struct r8a66597_root_hub *rh = &r8a66597->root_hub[port];
2146     unsigned long flags;
2147 
2148     ret = 0;
2149 
2150     spin_lock_irqsave(&r8a66597->lock, flags);
2151     switch (typeReq) {
2152     case ClearHubFeature:
2153     case SetHubFeature:
2154         switch (wValue) {
2155         case C_HUB_OVER_CURRENT:
2156         case C_HUB_LOCAL_POWER:
2157             break;
2158         default:
2159             goto error;
2160         }
2161         break;
2162     case ClearPortFeature:
2163         if (wIndex > r8a66597->max_root_hub)
2164             goto error;
2165         if (wLength != 0)
2166             goto error;
2167 
2168         switch (wValue) {
2169         case USB_PORT_FEAT_ENABLE:
2170             rh->port &= ~USB_PORT_STAT_POWER;
2171             break;
2172         case USB_PORT_FEAT_SUSPEND:
2173             break;
2174         case USB_PORT_FEAT_POWER:
2175             r8a66597_port_power(r8a66597, port, 0);
2176             break;
2177         case USB_PORT_FEAT_C_ENABLE:
2178         case USB_PORT_FEAT_C_SUSPEND:
2179         case USB_PORT_FEAT_C_CONNECTION:
2180         case USB_PORT_FEAT_C_OVER_CURRENT:
2181         case USB_PORT_FEAT_C_RESET:
2182             break;
2183         default:
2184             goto error;
2185         }
2186         rh->port &= ~(1 << wValue);
2187         break;
2188     case GetHubDescriptor:
2189         r8a66597_hub_descriptor(r8a66597,
2190                     (struct usb_hub_descriptor *)buf);
2191         break;
2192     case GetHubStatus:
2193         *buf = 0x00;
2194         break;
2195     case GetPortStatus:
2196         if (wIndex > r8a66597->max_root_hub)
2197             goto error;
2198         *(__le32 *)buf = cpu_to_le32(rh->port);
2199         break;
2200     case SetPortFeature:
2201         if (wIndex > r8a66597->max_root_hub)
2202             goto error;
2203         if (wLength != 0)
2204             goto error;
2205 
2206         switch (wValue) {
2207         case USB_PORT_FEAT_SUSPEND:
2208             break;
2209         case USB_PORT_FEAT_POWER:
2210             r8a66597_port_power(r8a66597, port, 1);
2211             rh->port |= USB_PORT_STAT_POWER;
2212             break;
2213         case USB_PORT_FEAT_RESET: {
2214             struct r8a66597_device *dev = rh->dev;
2215 
2216             rh->port |= USB_PORT_STAT_RESET;
2217 
2218             disable_r8a66597_pipe_all(r8a66597, dev);
2219             free_usb_address(r8a66597, dev, 1);
2220 
2221             r8a66597_mdfy(r8a66597, USBRST, USBRST | UACT,
2222                       get_dvstctr_reg(port));
2223             mod_timer(&r8a66597->rh_timer,
2224                   jiffies + msecs_to_jiffies(50));
2225             }
2226             break;
2227         default:
2228             goto error;
2229         }
2230         rh->port |= 1 << wValue;
2231         break;
2232     default:
2233 error:
2234         ret = -EPIPE;
2235         break;
2236     }
2237 
2238     spin_unlock_irqrestore(&r8a66597->lock, flags);
2239     return ret;
2240 }
2241 
2242 #if defined(CONFIG_PM)
2243 static int r8a66597_bus_suspend(struct usb_hcd *hcd)
2244 {
2245     struct r8a66597 *r8a66597 = hcd_to_r8a66597(hcd);
2246     int port;
2247 
2248     dev_dbg(&r8a66597->device0.udev->dev, "%s\n", __func__);
2249 
2250     for (port = 0; port < r8a66597->max_root_hub; port++) {
2251         struct r8a66597_root_hub *rh = &r8a66597->root_hub[port];
2252         unsigned long dvstctr_reg = get_dvstctr_reg(port);
2253 
2254         if (!(rh->port & USB_PORT_STAT_ENABLE))
2255             continue;
2256 
2257         dev_dbg(&rh->dev->udev->dev, "suspend port = %d\n", port);
2258         r8a66597_bclr(r8a66597, UACT, dvstctr_reg); /* suspend */
2259         rh->port |= USB_PORT_STAT_SUSPEND;
2260 
2261         if (rh->dev->udev->do_remote_wakeup) {
2262             msleep(3);  /* waiting last SOF */
2263             r8a66597_bset(r8a66597, RWUPE, dvstctr_reg);
2264             r8a66597_write(r8a66597, ~BCHG, get_intsts_reg(port));
2265             r8a66597_bset(r8a66597, BCHGE, get_intenb_reg(port));
2266         }
2267     }
2268 
2269     r8a66597->bus_suspended = 1;
2270 
2271     return 0;
2272 }
2273 
2274 static int r8a66597_bus_resume(struct usb_hcd *hcd)
2275 {
2276     struct r8a66597 *r8a66597 = hcd_to_r8a66597(hcd);
2277     int port;
2278 
2279     dev_dbg(&r8a66597->device0.udev->dev, "%s\n", __func__);
2280 
2281     for (port = 0; port < r8a66597->max_root_hub; port++) {
2282         struct r8a66597_root_hub *rh = &r8a66597->root_hub[port];
2283         unsigned long dvstctr_reg = get_dvstctr_reg(port);
2284 
2285         if (!(rh->port & USB_PORT_STAT_SUSPEND))
2286             continue;
2287 
2288         dev_dbg(&rh->dev->udev->dev, "resume port = %d\n", port);
2289         rh->port &= ~USB_PORT_STAT_SUSPEND;
2290         rh->port |= USB_PORT_STAT_C_SUSPEND << 16;
2291         r8a66597_mdfy(r8a66597, RESUME, RESUME | UACT, dvstctr_reg);
2292         msleep(USB_RESUME_TIMEOUT);
2293         r8a66597_mdfy(r8a66597, UACT, RESUME | UACT, dvstctr_reg);
2294     }
2295 
2296     return 0;
2297 
2298 }
2299 #else
2300 #define r8a66597_bus_suspend    NULL
2301 #define r8a66597_bus_resume NULL
2302 #endif
2303 
2304 static const struct hc_driver r8a66597_hc_driver = {
2305     .description =      hcd_name,
2306     .hcd_priv_size =    sizeof(struct r8a66597),
2307     .irq =          r8a66597_irq,
2308 
2309     /*
2310      * generic hardware linkage
2311      */
2312     .flags =        HCD_USB2,
2313 
2314     .start =        r8a66597_start,
2315     .stop =         r8a66597_stop,
2316 
2317     /*
2318      * managing i/o requests and associated device resources
2319      */
2320     .urb_enqueue =      r8a66597_urb_enqueue,
2321     .urb_dequeue =      r8a66597_urb_dequeue,
2322     .endpoint_disable = r8a66597_endpoint_disable,
2323 
2324     /*
2325      * periodic schedule support
2326      */
2327     .get_frame_number = r8a66597_get_frame,
2328 
2329     /*
2330      * root hub support
2331      */
2332     .hub_status_data =  r8a66597_hub_status_data,
2333     .hub_control =      r8a66597_hub_control,
2334     .bus_suspend =      r8a66597_bus_suspend,
2335     .bus_resume =       r8a66597_bus_resume,
2336 };
2337 
2338 #if defined(CONFIG_PM)
2339 static int r8a66597_suspend(struct device *dev)
2340 {
2341     struct r8a66597     *r8a66597 = dev_get_drvdata(dev);
2342     int port;
2343 
2344     dev_dbg(dev, "%s\n", __func__);
2345 
2346     disable_controller(r8a66597);
2347 
2348     for (port = 0; port < r8a66597->max_root_hub; port++) {
2349         struct r8a66597_root_hub *rh = &r8a66597->root_hub[port];
2350 
2351         rh->port = 0x00000000;
2352     }
2353 
2354     return 0;
2355 }
2356 
2357 static int r8a66597_resume(struct device *dev)
2358 {
2359     struct r8a66597     *r8a66597 = dev_get_drvdata(dev);
2360     struct usb_hcd      *hcd = r8a66597_to_hcd(r8a66597);
2361 
2362     dev_dbg(dev, "%s\n", __func__);
2363 
2364     enable_controller(r8a66597);
2365     usb_root_hub_lost_power(hcd->self.root_hub);
2366 
2367     return 0;
2368 }
2369 
2370 static const struct dev_pm_ops r8a66597_dev_pm_ops = {
2371     .suspend = r8a66597_suspend,
2372     .resume = r8a66597_resume,
2373     .poweroff = r8a66597_suspend,
2374     .restore = r8a66597_resume,
2375 };
2376 
2377 #define R8A66597_DEV_PM_OPS (&r8a66597_dev_pm_ops)
2378 #else   /* if defined(CONFIG_PM) */
2379 #define R8A66597_DEV_PM_OPS NULL
2380 #endif
2381 
2382 static int r8a66597_remove(struct platform_device *pdev)
2383 {
2384     struct r8a66597     *r8a66597 = platform_get_drvdata(pdev);
2385     struct usb_hcd      *hcd = r8a66597_to_hcd(r8a66597);
2386 
2387     del_timer_sync(&r8a66597->rh_timer);
2388     usb_remove_hcd(hcd);
2389     iounmap(r8a66597->reg);
2390     if (r8a66597->pdata->on_chip)
2391         clk_put(r8a66597->clk);
2392     usb_put_hcd(hcd);
2393     return 0;
2394 }
2395 
2396 static int r8a66597_probe(struct platform_device *pdev)
2397 {
2398     char clk_name[8];
2399     struct resource *res = NULL, *ires;
2400     int irq = -1;
2401     void __iomem *reg = NULL;
2402     struct usb_hcd *hcd = NULL;
2403     struct r8a66597 *r8a66597;
2404     int ret = 0;
2405     int i;
2406     unsigned long irq_trigger;
2407 
2408     if (usb_disabled())
2409         return -ENODEV;
2410 
2411     res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
2412     if (!res) {
2413         ret = -ENODEV;
2414         dev_err(&pdev->dev, "platform_get_resource error.\n");
2415         goto clean_up;
2416     }
2417 
2418     ires = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
2419     if (!ires) {
2420         ret = -ENODEV;
2421         dev_err(&pdev->dev,
2422             "platform_get_resource IORESOURCE_IRQ error.\n");
2423         goto clean_up;
2424     }
2425 
2426     irq = ires->start;
2427     irq_trigger = ires->flags & IRQF_TRIGGER_MASK;
2428 
2429     reg = ioremap(res->start, resource_size(res));
2430     if (reg == NULL) {
2431         ret = -ENOMEM;
2432         dev_err(&pdev->dev, "ioremap error.\n");
2433         goto clean_up;
2434     }
2435 
2436     if (pdev->dev.platform_data == NULL) {
2437         dev_err(&pdev->dev, "no platform data\n");
2438         ret = -ENODEV;
2439         goto clean_up;
2440     }
2441 
2442     /* initialize hcd */
2443     hcd = usb_create_hcd(&r8a66597_hc_driver, &pdev->dev, (char *)hcd_name);
2444     if (!hcd) {
2445         ret = -ENOMEM;
2446         dev_err(&pdev->dev, "Failed to create hcd\n");
2447         goto clean_up;
2448     }
2449     r8a66597 = hcd_to_r8a66597(hcd);
2450     memset(r8a66597, 0, sizeof(struct r8a66597));
2451     platform_set_drvdata(pdev, r8a66597);
2452     r8a66597->pdata = dev_get_platdata(&pdev->dev);
2453     r8a66597->irq_sense_low = irq_trigger == IRQF_TRIGGER_LOW;
2454 
2455     if (r8a66597->pdata->on_chip) {
2456         snprintf(clk_name, sizeof(clk_name), "usb%d", pdev->id);
2457         r8a66597->clk = clk_get(&pdev->dev, clk_name);
2458         if (IS_ERR(r8a66597->clk)) {
2459             dev_err(&pdev->dev, "cannot get clock \"%s\"\n",
2460                 clk_name);
2461             ret = PTR_ERR(r8a66597->clk);
2462             goto clean_up2;
2463         }
2464         r8a66597->max_root_hub = 1;
2465     } else
2466         r8a66597->max_root_hub = 2;
2467 
2468     spin_lock_init(&r8a66597->lock);
2469     timer_setup(&r8a66597->rh_timer, r8a66597_timer, 0);
2470     r8a66597->reg = reg;
2471 
2472     /* make sure no interrupts are pending */
2473     ret = r8a66597_clock_enable(r8a66597);
2474     if (ret < 0)
2475         goto clean_up3;
2476     disable_controller(r8a66597);
2477 
2478     for (i = 0; i < R8A66597_MAX_NUM_PIPE; i++) {
2479         INIT_LIST_HEAD(&r8a66597->pipe_queue[i]);
2480         r8a66597->timers[i].r8a66597 = r8a66597;
2481         timer_setup(&r8a66597->timers[i].td, r8a66597_td_timer, 0);
2482         timer_setup(&r8a66597->timers[i].interval,
2483                 r8a66597_interval_timer, 0);
2484     }
2485     INIT_LIST_HEAD(&r8a66597->child_device);
2486 
2487     hcd->rsrc_start = res->start;
2488     hcd->has_tt = 1;
2489 
2490     ret = usb_add_hcd(hcd, irq, irq_trigger);
2491     if (ret != 0) {
2492         dev_err(&pdev->dev, "Failed to add hcd\n");
2493         goto clean_up3;
2494     }
2495     device_wakeup_enable(hcd->self.controller);
2496 
2497     return 0;
2498 
2499 clean_up3:
2500     if (r8a66597->pdata->on_chip)
2501         clk_put(r8a66597->clk);
2502 clean_up2:
2503     usb_put_hcd(hcd);
2504 
2505 clean_up:
2506     if (reg)
2507         iounmap(reg);
2508 
2509     return ret;
2510 }
2511 
2512 static struct platform_driver r8a66597_driver = {
2513     .probe =    r8a66597_probe,
2514     .remove =   r8a66597_remove,
2515     .driver     = {
2516         .name = hcd_name,
2517         .pm = R8A66597_DEV_PM_OPS,
2518     },
2519 };
2520 
2521 module_platform_driver(r8a66597_driver);
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