git.sur5r.net Git - u-boot/blob - drivers/sl811_usb.c

   1 /*
   2  * (C) Copyright 2004
   3  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
   4  *
   5  * This code is based on linux driver for sl811hs chip, source at
   6  * drivers/usb/host/sl811.c:
   7  *
   8  * SL811 Host Controller Interface driver for USB.
   9  *
  10  * Copyright (c) 2003/06, Courage Co., Ltd.
  11  *
  12  * Based on:
  13  *      1.uhci.c by Linus Torvalds, Johannes Erdfelt, Randy Dunlap,
  14  *        Georg Acher, Deti Fliegl, Thomas Sailer, Roman Weissgaerber,
  15  *        Adam Richter, Gregory P. Smith;
  16  *      2.Original SL811 driver (hc_sl811.o) by Pei Liu <pbl@cypress.com>
  17  *      3.Rewrited as sl811.o by Yin Aihua <yinah:couragetech.com.cn>
  18  *
  19  * See file CREDITS for list of people who contributed to this
  20  * project.
  21  *
  22  * This program is free software; you can redistribute it and/or
  23  * modify it under the terms of the GNU General Public License as
  24  * published by the Free Software Foundation; either version 2 of
  25  * the License, or (at your option) any later version.
  26  *
  27  * This program is distributed in the hope that it will be useful,
  28  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  29  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  30  * GNU General Public License for more details.
  31  *
  32  * You should have received a copy of the GNU General Public License
  33  * along with this program; if not, write to the Free Software
  34  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  35  * MA 02111-1307 USA
  36  */
  37
  38 #include <common.h>
  39 #ifdef CONFIG_USB_SL811HS
  40 #include <mpc8xx.h>
  41 #include <usb.h>
  42 #include "sl811.h"
  43
  44 #include "../board/kup/common/kup.h"
  45
  46 #ifdef __PPC__
  47 # define EIEIO          __asm__ volatile ("eieio")
  48 #else
  49 # define EIEIO          /* nothing */
  50 #endif
  51
  52 #define  SL811_ADR (0x50000000)
  53 #define  SL811_DAT (0x50000001)
  54
  55 #define mdelay(n) ({unsigned long msec=(n); while (msec--) udelay(1000);})
  56
  57 #ifdef SL811_DEBUG
  58 static int debug = 9;
  59 #endif
  60
  61 static int root_hub_devnum = 0;
  62 static struct usb_port_status rh_status = { 0 };/* root hub port status */
  63
  64 static int sl811_rh_submit_urb(struct usb_device *usb_dev, unsigned long pipe,
  65                                void *data, int buf_len, struct devrequest *cmd);
  66
  67 static void sl811_write (__u8 index, __u8 data)
  68 {
  69         *(volatile unsigned char *) (SL811_ADR) = index;
  70         EIEIO;
  71         *(volatile unsigned char *) (SL811_DAT) = data;
  72         EIEIO;
  73 }
  74
  75 static __u8 sl811_read (__u8 index)
  76 {
  77         __u8 data;
  78
  79         *(volatile unsigned char *) (SL811_ADR) = index;
  80         EIEIO;
  81         data = *(volatile unsigned char *) (SL811_DAT);
  82         EIEIO;
  83         return (data);
  84 }
  85
  86 /*
  87  * Read consecutive bytes of data from the SL811H/SL11H buffer
  88  */
  89 static void inline sl811_read_buf(__u8 offset, __u8 *buf, __u8 size)
  90 {
  91         *(volatile unsigned char *) (SL811_ADR) = offset;
  92         EIEIO;
  93         while (size--) {
  94                 *buf++ = *(volatile unsigned char *) (SL811_DAT);
  95                 EIEIO;
  96         }
  97 }
  98
  99 /*
 100  * Write consecutive bytes of data to the SL811H/SL11H buffer
 101  */
 102 static void inline sl811_write_buf(__u8 offset, __u8 *buf, __u8 size)
 103 {
 104         *(volatile unsigned char *) (SL811_ADR) = offset;
 105         EIEIO;
 106         while (size--) {
 107                 *(volatile unsigned char *) (SL811_DAT) = *buf++;
 108                 EIEIO;
 109         }
 110 }
 111
 112 int usb_init_kup4x (void)
 113 {
 114         volatile immap_t *immap = (immap_t *) CFG_IMMR;
 115         volatile memctl8xx_t *memctl = &immap->im_memctl;
 116         int i;
 117         unsigned char tmp;
 118
 119         memctl = &immap->im_memctl;
 120         memctl->memc_or7 = 0xFFFF8726;
 121         memctl->memc_br7 = 0x50000401;  /* start at 0x50000000 */
 122         /* BP 14 low = USB ON */
 123         immap->im_cpm.cp_pbdat &= ~(BP_USB_VCC);
 124         /* PB 14 nomal port */
 125         immap->im_cpm.cp_pbpar &= ~(BP_USB_VCC);
 126         /* output */
 127         immap->im_cpm.cp_pbdir |= (BP_USB_VCC);
 128
 129         puts ("USB:   ");
 130
 131         for (i = 0x10; i < 0xff; i++) {
 132                 sl811_write(i, i);
 133                 tmp = (sl811_read(i));
 134                 if (tmp != i) {
 135                         printf ("SL811 compare error index=0x%02x read=0x%02x\n", i, tmp);
 136                         return (-1);
 137                 }
 138         }
 139         printf ("SL811 ready\n");
 140         return (0);
 141 }
 142
 143 /*
 144  * This function resets SL811HS controller and detects the speed of
 145  * the connecting device
 146  *
 147  * Return: 0 = no device attached; 1 = USB device attached
 148  */
 149 static int sl811_hc_reset(void)
 150 {
 151         int status ;
 152
 153         sl811_write(SL811_CTRL2, SL811_CTL2_HOST | SL811_12M_HI);
 154         sl811_write(SL811_CTRL1, SL811_CTRL1_RESET);
 155
 156         mdelay(20);
 157
 158         /* Disable hardware SOF generation, clear all irq status. */
 159         sl811_write(SL811_CTRL1, 0);
 160         mdelay(2);
 161         sl811_write(SL811_INTRSTS, 0xff);
 162         status = sl811_read(SL811_INTRSTS);
 163
 164         if (status & SL811_INTR_NOTPRESENT) {
 165                 /* Device is not present */
 166                 PDEBUG(0, "Device not present\n");
 167                 rh_status.wPortStatus &= ~(USB_PORT_STAT_CONNECTION | USB_PORT_STAT_ENABLE);
 168                 rh_status.wPortChange |= USB_PORT_STAT_C_CONNECTION;
 169                 sl811_write(SL811_INTR, SL811_INTR_INSRMV);
 170                 return 0;
 171         }
 172
 173         /* Send SOF to address 0, endpoint 0. */
 174         sl811_write(SL811_LEN_B, 0);
 175         sl811_write(SL811_PIDEP_B, PIDEP(USB_PID_SOF, 0));
 176         sl811_write(SL811_DEV_B, 0x00);
 177         sl811_write(SL811_SOFLOW, SL811_12M_LOW);
 178
 179         if (status & SL811_INTR_SPEED_FULL) {
 180                 /* full speed device connect directly to root hub */
 181                 PDEBUG (0, "Full speed Device attached\n");
 182
 183                 sl811_write(SL811_CTRL1, SL811_CTRL1_RESET);
 184                 mdelay(20);
 185                 sl811_write(SL811_CTRL2, SL811_CTL2_HOST | SL811_12M_HI);
 186                 sl811_write(SL811_CTRL1, SL811_CTRL1_SOF);
 187
 188                 /* start the SOF or EOP */
 189                 sl811_write(SL811_CTRL_B, SL811_USB_CTRL_ARM);
 190                 rh_status.wPortStatus |= USB_PORT_STAT_CONNECTION;
 191                 rh_status.wPortStatus &= ~USB_PORT_STAT_LOW_SPEED;
 192                 mdelay(2);
 193                 sl811_write(SL811_INTRSTS, 0xff);
 194         } else {
 195                 /* slow speed device connect directly to root-hub */
 196                 PDEBUG(0, "Low speed Device attached\n");
 197
 198                 sl811_write(SL811_CTRL1, SL811_CTRL1_RESET);
 199                 mdelay(20);
 200                 sl811_write(SL811_CTRL2, SL811_CTL2_HOST | SL811_CTL2_DSWAP | SL811_12M_HI);
 201                 sl811_write(SL811_CTRL1, SL811_CTRL1_SPEED_LOW | SL811_CTRL1_SOF);
 202
 203                 /* start the SOF or EOP */
 204                 sl811_write(SL811_CTRL_B, SL811_USB_CTRL_ARM);
 205                 rh_status.wPortStatus |= USB_PORT_STAT_CONNECTION | USB_PORT_STAT_LOW_SPEED;
 206                 mdelay(2);
 207                 sl811_write(SL811_INTRSTS, 0xff);
 208         }
 209
 210         rh_status.wPortChange |= USB_PORT_STAT_C_CONNECTION;
 211         sl811_write(SL811_INTR, /*SL811_INTR_INSRMV*/SL811_INTR_DONE_A);
 212
 213         return 1;
 214 }
 215
 216 int usb_lowlevel_init(void)
 217 {
 218         root_hub_devnum = 0;
 219         sl811_hc_reset();
 220         return 0;
 221 }
 222
 223 int usb_lowlevel_stop(void)
 224 {
 225         sl811_hc_reset();
 226         return 0;
 227 }
 228
 229 int sl811_send_packet(int dir_to_host, int data1, __u8 *buffer, int len)
 230 {
 231         __u8 ctrl = SL811_USB_CTRL_ARM | SL811_USB_CTRL_ENABLE;
 232         __u16 status;
 233         int err = 0;
 234
 235         if (len > 239)
 236                 return -1;
 237
 238         if (!dir_to_host)
 239                 ctrl |= SL811_USB_CTRL_DIR_OUT;
 240         if (data1)
 241                 ctrl |= SL811_USB_CTRL_TOGGLE_1;
 242
 243         sl811_write(SL811_ADDR_A, 0x10);
 244         sl811_write(SL811_LEN_A, len);
 245         if (!dir_to_host && len)
 246                 sl811_write_buf(0x10, buffer, len);
 247
 248         while (err < 3) {
 249                 if (sl811_read(SL811_SOFCNTDIV)*64 < len * 8 * 2)
 250                         ctrl |= SL811_USB_CTRL_SOF;
 251                 else
 252                         ctrl &= ~SL811_USB_CTRL_SOF;
 253                 sl811_write(SL811_CTRL_A, ctrl);
 254                 while (!(sl811_read(SL811_INTRSTS) & SL811_INTR_DONE_A))
 255                         ; /* do nothing */
 256
 257                 sl811_write(SL811_INTRSTS, 0xff);
 258                 status = sl811_read(SL811_STS_A);
 259
 260                 if (status & SL811_USB_STS_ACK) {
 261                         int remainder = sl811_read(SL811_CNT_A);
 262                         if (remainder) {
 263                                 PDEBUG(0, "usb transfer remainder = %d\n", remainder);
 264                                 len -= remainder;
 265                         }
 266                         if (dir_to_host && len)
 267                                 sl811_read_buf(0x10, buffer, len);
 268                         return len;
 269                 }
 270
 271                 if ((status & SL811_USB_STS_NAK) == SL811_USB_STS_NAK)
 272                         continue;
 273
 274                 PDEBUG(0, "usb transfer error %#x\n", (int)status);
 275                 err++;
 276         }
 277
 278         return -1;
 279 }
 280
 281 int submit_bulk_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
 282                     int len)
 283 {
 284         int dir_out = usb_pipeout(pipe);
 285         int ep = usb_pipeendpoint(pipe);
 286         __u8* buf = (__u8*)buffer;
 287         int max = usb_maxpacket(dev, pipe);
 288         int done = 0;
 289
 290         PDEBUG(7, "dev = %ld pipe = %ld buf = %p size = %d dir_out = %d\n",
 291                usb_pipedevice(pipe), usb_pipeendpoint(pipe), buffer, len, dir_out);
 292
 293         dev->status = 0;
 294
 295         sl811_write(SL811_DEV_A, usb_pipedevice(pipe));
 296         sl811_write(SL811_PIDEP_A, PIDEP(!dir_out ? USB_PID_IN : USB_PID_OUT, ep));
 297         while (done < len) {
 298                 int res = sl811_send_packet(!dir_out, usb_gettoggle(dev, ep, dir_out),
 299                                             buf+done,
 300                                             max > len - done ? len - done : max);
 301                 if (res < 0) {
 302                         dev->status = res;
 303                         return res;
 304                 }
 305
 306                 if (!dir_out && res < max) /* short packet */
 307                         break;
 308
 309                 done += res;
 310                 usb_dotoggle(dev, ep, dir_out);
 311         }
 312
 313         dev->act_len = done;
 314
 315         return 0;
 316 }
 317
 318 int submit_control_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
 319                        int len,struct devrequest *setup)
 320 {
 321         int done = 0;
 322         int devnum = usb_pipedevice(pipe);
 323
 324         dev->status = 0;
 325
 326         if (devnum == root_hub_devnum)
 327                 return sl811_rh_submit_urb(dev, pipe, buffer, len, setup);
 328
 329         PDEBUG(7, "dev = %d pipe = %ld buf = %p size = %d rt = %#x req = %#x\n",
 330                devnum, usb_pipeendpoint(pipe), buffer, len, (int)setup->requesttype,
 331                (int)setup->request);
 332
 333         sl811_write(SL811_DEV_A, devnum);
 334         sl811_write(SL811_PIDEP_A, PIDEP(USB_PID_SETUP, 0));
 335         /* setup phase */
 336         if (sl811_send_packet(0, 0, (__u8*)setup, sizeof(*setup)) == sizeof(*setup)) {
 337                 int dir_in = setup->requesttype & USB_DIR_IN;
 338                 __u8* buf = (__u8*)buffer;
 339                 int data1 = 1;
 340                 int max = usb_maxpacket(dev, pipe);
 341
 342                 /* data phase */
 343                 sl811_write(SL811_PIDEP_A,
 344                             PIDEP(dir_in ? USB_PID_IN : USB_PID_OUT, 0));
 345                 while (done < len) {
 346                         int res = sl811_send_packet(dir_in, data1, buf+done,
 347                                                     max > len - done ? len - done : max);
 348                         if (res < 0)
 349                                 return res;
 350                         done += res;
 351
 352                         if (dir_in && res < max) /* short packet */
 353                                 break;
 354
 355                         data1 = !data1;
 356                 }
 357
 358                 /* status phase */
 359                 sl811_write(SL811_PIDEP_A,
 360                             PIDEP(!dir_in ? USB_PID_IN : USB_PID_OUT, 0));
 361                 if (sl811_send_packet(!dir_in, 1, 0, 0) < 0) {
 362                         PDEBUG(0, "status phase failed!\n");
 363                         dev->status = -1;
 364                 }
 365         } else {
 366                 PDEBUG(0, "setup phase failed!\n");
 367                 dev->status = -1;
 368         }
 369
 370         dev->act_len = done;
 371
 372         return done;
 373 }
 374
 375 int submit_int_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
 376                    int len, int interval)
 377 {
 378         PDEBUG(7, "dev = %p pipe = %#lx buf = %p size = %d int = %d\n", dev, pipe,
 379                buffer, len, interval);
 380         return -1;
 381 }
 382
 383 /*
 384  * SL811 Virtual Root Hub
 385  */
 386
 387 /* Device descriptor */
 388 static __u8 sl811_rh_dev_des[] =
 389 {
 390         0x12,       /*  __u8  bLength; */
 391         0x01,       /*  __u8  bDescriptorType; Device */
 392         0x10,       /*  __u16 bcdUSB; v1.1 */
 393         0x01,
 394         0x09,       /*  __u8  bDeviceClass; HUB_CLASSCODE */
 395         0x00,       /*  __u8  bDeviceSubClass; */
 396         0x00,       /*  __u8  bDeviceProtocol; */
 397         0x08,       /*  __u8  bMaxPacketSize0; 8 Bytes */
 398         0x00,       /*  __u16 idVendor; */
 399         0x00,
 400         0x00,       /*  __u16 idProduct; */
 401         0x00,
 402         0x00,       /*  __u16 bcdDevice; */
 403         0x00,
 404         0x00,       /*  __u8  iManufacturer; */
 405         0x02,       /*  __u8  iProduct; */
 406         0x01,       /*  __u8  iSerialNumber; */
 407         0x01        /*  __u8  bNumConfigurations; */
 408 };
 409
 410 /* Configuration descriptor */
 411 static __u8 sl811_rh_config_des[] =
 412 {
 413         0x09,       /*  __u8  bLength; */
 414         0x02,       /*  __u8  bDescriptorType; Configuration */
 415         0x19,       /*  __u16 wTotalLength; */
 416         0x00,
 417         0x01,       /*  __u8  bNumInterfaces; */
 418         0x01,       /*  __u8  bConfigurationValue; */
 419         0x00,       /*  __u8  iConfiguration; */
 420         0x40,       /*  __u8  bmAttributes;
 421                     Bit 7: Bus-powered, 6: Self-powered, 5 Remote-wakwup,
 422                     4..0: resvd */
 423         0x00,       /*  __u8  MaxPower; */
 424
 425         /* interface */
 426         0x09,       /*  __u8  if_bLength; */
 427         0x04,       /*  __u8  if_bDescriptorType; Interface */
 428         0x00,       /*  __u8  if_bInterfaceNumber; */
 429         0x00,       /*  __u8  if_bAlternateSetting; */
 430         0x01,       /*  __u8  if_bNumEndpoints; */
 431         0x09,       /*  __u8  if_bInterfaceClass; HUB_CLASSCODE */
 432         0x00,       /*  __u8  if_bInterfaceSubClass; */
 433         0x00,       /*  __u8  if_bInterfaceProtocol; */
 434         0x00,       /*  __u8  if_iInterface; */
 435
 436         /* endpoint */
 437         0x07,       /*  __u8  ep_bLength; */
 438         0x05,       /*  __u8  ep_bDescriptorType; Endpoint */
 439         0x81,       /*  __u8  ep_bEndpointAddress; IN Endpoint 1 */
 440         0x03,       /*  __u8  ep_bmAttributes; Interrupt */
 441         0x08,       /*  __u16 ep_wMaxPacketSize; */
 442         0x00,
 443         0xff        /*  __u8  ep_bInterval; 255 ms */
 444 };
 445
 446 /* root hub class descriptor*/
 447 static __u8 sl811_rh_hub_des[] =
 448 {
 449         0x09,                   /*  __u8  bLength; */
 450         0x29,                   /*  __u8  bDescriptorType; Hub-descriptor */
 451         0x01,                   /*  __u8  bNbrPorts; */
 452         0x00,                   /* __u16  wHubCharacteristics; */
 453         0x00,
 454         0x50,                   /*  __u8  bPwrOn2pwrGood; 2ms */
 455         0x00,                   /*  __u8  bHubContrCurrent; 0 mA */
 456         0xfc,                   /*  __u8  DeviceRemovable; *** 7 Ports max *** */
 457         0xff                    /*  __u8  PortPwrCtrlMask; *** 7 ports max *** */
 458 };
 459
 460 /*
 461  * helper routine for returning string descriptors in UTF-16LE
 462  * input can actually be ISO-8859-1; ASCII is its 7-bit subset
 463  */
 464 static int ascii2utf (char *s, u8 *utf, int utfmax)
 465 {
 466         int retval;
 467
 468         for (retval = 0; *s && utfmax > 1; utfmax -= 2, retval += 2) {
 469                 *utf++ = *s++;
 470                 *utf++ = 0;
 471         }
 472         return retval;
 473 }
 474
 475 /*
 476  * root_hub_string is used by each host controller's root hub code,
 477  * so that they're identified consistently throughout the system.
 478  */
 479 int usb_root_hub_string (int id, int serial, char *type, __u8 *data, int len)
 480 {
 481         char buf [30];
 482
 483         /* assert (len > (2 * (sizeof (buf) + 1)));
 484            assert (strlen (type) <= 8);*/
 485
 486         /* language ids */
 487         if (id == 0) {
 488                 *data++ = 4; *data++ = 3;       /* 4 bytes data */
 489                 *data++ = 0; *data++ = 0;       /* some language id */
 490                 return 4;
 491
 492         /* serial number */
 493         } else if (id == 1) {
 494                 sprintf (buf, "%x", serial);
 495
 496         /* product description */
 497         } else if (id == 2) {
 498                 sprintf (buf, "USB %s Root Hub", type);
 499
 500         /* id 3 == vendor description */
 501
 502         /* unsupported IDs --> "stall" */
 503         } else
 504             return 0;
 505
 506         data [0] = 2 + ascii2utf (buf, data + 2, len - 2);
 507         data [1] = 3;
 508         return data [0];
 509 }
 510
 511 /* helper macro */
 512 #define OK(x)   len = (x); break
 513
 514 /*
 515  * This function handles all USB request to the the virtual root hub
 516  */
 517 static int sl811_rh_submit_urb(struct usb_device *usb_dev, unsigned long pipe,
 518                                void *data, int buf_len, struct devrequest *cmd)
 519 {
 520         __u8 data_buf[16];
 521         __u8 *bufp = data_buf;
 522         int len = 0;
 523         int status = 0;
 524
 525         __u16 bmRType_bReq;
 526         __u16 wValue;
 527         __u16 wIndex;
 528         __u16 wLength;
 529
 530         if (usb_pipeint(pipe)) {
 531                 PDEBUG(0, "interrupt transfer unimplemented!\n");
 532                 return 0;
 533         }
 534
 535         bmRType_bReq  = cmd->requesttype | (cmd->request << 8);
 536         wValue        = le16_to_cpu (cmd->value);
 537         wIndex        = le16_to_cpu (cmd->index);
 538         wLength       = le16_to_cpu (cmd->length);
 539
 540         PDEBUG(5, "submit rh urb, req = %d(%x) val = %#x index = %#x len=%d\n",
 541                bmRType_bReq, bmRType_bReq, wValue, wIndex, wLength);
 542
 543         /* Request Destination:
 544                    without flags: Device,
 545                    USB_RECIP_INTERFACE: interface,
 546                    USB_RECIP_ENDPOINT: endpoint,
 547                    USB_TYPE_CLASS means HUB here,
 548                    USB_RECIP_OTHER | USB_TYPE_CLASS  almost ever means HUB_PORT here
 549         */
 550         switch (bmRType_bReq) {
 551         case RH_GET_STATUS:
 552                 *(__u16 *)bufp = cpu_to_le16(1);
 553                 OK(2);
 554
 555         case RH_GET_STATUS | USB_RECIP_INTERFACE:
 556                 *(__u16 *)bufp = cpu_to_le16(0);
 557                 OK(2);
 558
 559         case RH_GET_STATUS | USB_RECIP_ENDPOINT:
 560                 *(__u16 *)bufp = cpu_to_le16(0);
 561                 OK(2);
 562
 563         case RH_GET_STATUS | USB_TYPE_CLASS:
 564                 *(__u32 *)bufp = cpu_to_le32(0);
 565                 OK(4);
 566
 567         case RH_GET_STATUS | USB_RECIP_OTHER | USB_TYPE_CLASS:
 568                 *(__u32 *)bufp = cpu_to_le32(rh_status.wPortChange<<16 | rh_status.wPortStatus);
 569                 OK(4);
 570
 571         case RH_CLEAR_FEATURE | USB_RECIP_ENDPOINT:
 572                 switch (wValue) {
 573                 case 1:
 574                         OK(0);
 575                 }
 576                 break;
 577
 578         case RH_CLEAR_FEATURE | USB_TYPE_CLASS:
 579                 switch (wValue) {
 580                 case C_HUB_LOCAL_POWER:
 581                         OK(0);
 582
 583                 case C_HUB_OVER_CURRENT:
 584                         OK(0);
 585                 }
 586                 break;
 587
 588         case RH_CLEAR_FEATURE | USB_RECIP_OTHER | USB_TYPE_CLASS:
 589                 switch (wValue) {
 590                 case USB_PORT_FEAT_ENABLE:
 591                         rh_status.wPortStatus &= ~USB_PORT_STAT_ENABLE;
 592                         OK(0);
 593
 594                 case USB_PORT_FEAT_SUSPEND:
 595                         rh_status.wPortStatus &= ~USB_PORT_STAT_SUSPEND;
 596                         OK(0);
 597
 598                 case USB_PORT_FEAT_POWER:
 599                         rh_status.wPortStatus &= ~USB_PORT_STAT_POWER;
 600                         OK(0);
 601
 602                 case USB_PORT_FEAT_C_CONNECTION:
 603                         rh_status.wPortChange &= ~USB_PORT_STAT_C_CONNECTION;
 604                         OK(0);
 605
 606                 case USB_PORT_FEAT_C_ENABLE:
 607                         rh_status.wPortChange &= ~USB_PORT_STAT_C_ENABLE;
 608                         OK(0);
 609
 610                 case USB_PORT_FEAT_C_SUSPEND:
 611                         rh_status.wPortChange &= ~USB_PORT_STAT_C_SUSPEND;
 612                         OK(0);
 613
 614                 case USB_PORT_FEAT_C_OVER_CURRENT:
 615                         rh_status.wPortChange &= ~USB_PORT_STAT_C_OVERCURRENT;
 616                         OK(0);
 617
 618                 case USB_PORT_FEAT_C_RESET:
 619                         rh_status.wPortChange &= ~USB_PORT_STAT_C_RESET;
 620                         OK(0);
 621                 }
 622                 break;
 623
 624         case RH_SET_FEATURE | USB_RECIP_OTHER | USB_TYPE_CLASS:
 625                 switch (wValue) {
 626                 case USB_PORT_FEAT_SUSPEND:
 627                         rh_status.wPortStatus |= USB_PORT_STAT_SUSPEND;
 628                         OK(0);
 629
 630                 case USB_PORT_FEAT_RESET:
 631                         rh_status.wPortStatus |= USB_PORT_STAT_RESET;
 632                         rh_status.wPortChange = 0;
 633                         rh_status.wPortChange |= USB_PORT_STAT_C_RESET;
 634                         rh_status.wPortStatus &= ~USB_PORT_STAT_RESET;
 635                         rh_status.wPortStatus |= USB_PORT_STAT_ENABLE;
 636                         OK(0);
 637
 638                 case USB_PORT_FEAT_POWER:
 639                         rh_status.wPortStatus |= USB_PORT_STAT_POWER;
 640                         OK(0);
 641
 642                 case USB_PORT_FEAT_ENABLE:
 643                         rh_status.wPortStatus |= USB_PORT_STAT_ENABLE;
 644                         OK(0);
 645                 }
 646                 break;
 647
 648         case RH_SET_ADDRESS:
 649                 root_hub_devnum = wValue;
 650                 OK(0);
 651
 652         case RH_GET_DESCRIPTOR:
 653                 switch ((wValue & 0xff00) >> 8) {
 654                 case USB_DT_DEVICE:
 655                         len = sizeof(sl811_rh_dev_des);
 656                         bufp = sl811_rh_dev_des;
 657                         OK(len);
 658
 659                 case USB_DT_CONFIG:
 660                         len = sizeof(sl811_rh_config_des);
 661                         bufp = sl811_rh_config_des;
 662                         OK(len);
 663
 664                 case USB_DT_STRING:
 665                         len = usb_root_hub_string(wValue & 0xff, (int)(long)0,  "SL811HS", data, wLength);
 666                         if (len > 0) {
 667                                 bufp = data;
 668                                 OK(len);
 669                         }
 670
 671                 default:
 672                         status = -32;
 673                 }
 674                 break;
 675
 676         case RH_GET_DESCRIPTOR | USB_TYPE_CLASS:
 677                 len = sizeof(sl811_rh_hub_des);
 678                 bufp = sl811_rh_hub_des;
 679                 OK(len);
 680
 681         case RH_GET_CONFIGURATION:
 682                 bufp[0] = 0x01;
 683                 OK(1);
 684
 685         case RH_SET_CONFIGURATION:
 686                 OK(0);
 687
 688         default:
 689                 PDEBUG(1, "unsupported root hub command\n");
 690                 status = -32;
 691         }
 692
 693         len = min(len, buf_len);
 694         if (data != bufp)
 695                 memcpy(data, bufp, len);
 696
 697         PDEBUG(5, "len = %d, status = %d\n", len, status);
 698
 699         usb_dev->status = status;
 700         usb_dev->act_len = len;
 701
 702         return status == 0 ? len : status;
 703 }
 704
 705 #endif  /* CONFIG_USB_SL811HS */