drivers/usb/host/sl811-hcd.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 #include <mpc8xx.h>
  40 #include <usb.h>
  41 #include "sl811.h"
  42
  43 #include "../../../board/kup/common/kup.h"
  44
  45 #ifdef __PPC__
  46 # define EIEIO          __asm__ volatile ("eieio")
  47 #else
  48 # define EIEIO          /* nothing */
  49 #endif
  50
  51 #define  SL811_ADR (0x50000000)
  52 #define  SL811_DAT (0x50000001)
  53
  54 #ifdef SL811_DEBUG
  55 static int debug = 9;
  56 #endif
  57
  58 static int root_hub_devnum = 0;
  59 static struct usb_port_status rh_status = { 0 };/* root hub port status */
  60
  61 static int sl811_rh_submit_urb(struct usb_device *usb_dev, unsigned long pipe,
  62                                void *data, int buf_len, struct devrequest *cmd);
  63
  64 static void sl811_write (__u8 index, __u8 data)
  65 {
  66         *(volatile unsigned char *) (SL811_ADR) = index;
  67         EIEIO;
  68         *(volatile unsigned char *) (SL811_DAT) = data;
  69         EIEIO;
  70 }
  71
  72 static __u8 sl811_read (__u8 index)
  73 {
  74         __u8 data;
  75
  76         *(volatile unsigned char *) (SL811_ADR) = index;
  77         EIEIO;
  78         data = *(volatile unsigned char *) (SL811_DAT);
  79         EIEIO;
  80         return (data);
  81 }
  82
  83 /*
  84  * Read consecutive bytes of data from the SL811H/SL11H buffer
  85  */
  86 static void inline sl811_read_buf(__u8 offset, __u8 *buf, __u8 size)
  87 {
  88         *(volatile unsigned char *) (SL811_ADR) = offset;
  89         EIEIO;
  90         while (size--) {
  91                 *buf++ = *(volatile unsigned char *) (SL811_DAT);
  92                 EIEIO;
  93         }
  94 }
  95
  96 /*
  97  * Write consecutive bytes of data to the SL811H/SL11H buffer
  98  */
  99 static void inline sl811_write_buf(__u8 offset, __u8 *buf, __u8 size)
 100 {
 101         *(volatile unsigned char *) (SL811_ADR) = offset;
 102         EIEIO;
 103         while (size--) {
 104                 *(volatile unsigned char *) (SL811_DAT) = *buf++;
 105                 EIEIO;
 106         }
 107 }
 108
 109 int usb_init_kup4x (void)
 110 {
 111         volatile immap_t *immap = (immap_t *) CONFIG_SYS_IMMR;
 112         volatile memctl8xx_t *memctl = &immap->im_memctl;
 113         int i;
 114         unsigned char tmp;
 115
 116         memctl = &immap->im_memctl;
 117         memctl->memc_or7 = 0xFFFF8726;
 118         memctl->memc_br7 = 0x50000401;  /* start at 0x50000000 */
 119         /* BP 14 low = USB ON */
 120         immap->im_cpm.cp_pbdat &= ~(BP_USB_VCC);
 121         /* PB 14 nomal port */
 122         immap->im_cpm.cp_pbpar &= ~(BP_USB_VCC);
 123         /* output */
 124         immap->im_cpm.cp_pbdir |= (BP_USB_VCC);
 125
 126         puts ("USB:   ");
 127
 128         for (i = 0x10; i < 0xff; i++) {
 129                 sl811_write(i, i);
 130                 tmp = (sl811_read(i));
 131                 if (tmp != i) {
 132                         printf ("SL811 compare error index=0x%02x read=0x%02x\n", i, tmp);
 133                         return (-1);
 134                 }
 135         }
 136         printf ("SL811 ready\n");
 137         return (0);
 138 }
 139
 140 /*
 141  * This function resets SL811HS controller and detects the speed of
 142  * the connecting device
 143  *
 144  * Return: 0 = no device attached; 1 = USB device attached
 145  */
 146 static int sl811_hc_reset(void)
 147 {
 148         int status ;
 149
 150         sl811_write(SL811_CTRL2, SL811_CTL2_HOST | SL811_12M_HI);
 151         sl811_write(SL811_CTRL1, SL811_CTRL1_RESET);
 152
 153         mdelay(20);
 154
 155         /* Disable hardware SOF generation, clear all irq status. */
 156         sl811_write(SL811_CTRL1, 0);
 157         mdelay(2);
 158         sl811_write(SL811_INTRSTS, 0xff);
 159         status = sl811_read(SL811_INTRSTS);
 160
 161         if (status & SL811_INTR_NOTPRESENT) {
 162                 /* Device is not present */
 163                 PDEBUG(0, "Device not present\n");
 164                 rh_status.wPortStatus &= ~(USB_PORT_STAT_CONNECTION | USB_PORT_STAT_ENABLE);
 165                 rh_status.wPortChange |= USB_PORT_STAT_C_CONNECTION;
 166                 sl811_write(SL811_INTR, SL811_INTR_INSRMV);
 167                 return 0;
 168         }
 169
 170         /* Send SOF to address 0, endpoint 0. */
 171         sl811_write(SL811_LEN_B, 0);
 172         sl811_write(SL811_PIDEP_B, PIDEP(USB_PID_SOF, 0));
 173         sl811_write(SL811_DEV_B, 0x00);
 174         sl811_write(SL811_SOFLOW, SL811_12M_LOW);
 175
 176         if (status & SL811_INTR_SPEED_FULL) {
 177                 /* full speed device connect directly to root hub */
 178                 PDEBUG (0, "Full speed Device attached\n");
 179
 180                 sl811_write(SL811_CTRL1, SL811_CTRL1_RESET);
 181                 mdelay(20);
 182                 sl811_write(SL811_CTRL2, SL811_CTL2_HOST | SL811_12M_HI);
 183                 sl811_write(SL811_CTRL1, SL811_CTRL1_SOF);
 184
 185                 /* start the SOF or EOP */
 186                 sl811_write(SL811_CTRL_B, SL811_USB_CTRL_ARM);
 187                 rh_status.wPortStatus |= USB_PORT_STAT_CONNECTION;
 188                 rh_status.wPortStatus &= ~USB_PORT_STAT_LOW_SPEED;
 189                 mdelay(2);
 190                 sl811_write(SL811_INTRSTS, 0xff);
 191         } else {
 192                 /* slow speed device connect directly to root-hub */
 193                 PDEBUG(0, "Low speed Device attached\n");
 194
 195                 sl811_write(SL811_CTRL1, SL811_CTRL1_RESET);
 196                 mdelay(20);
 197                 sl811_write(SL811_CTRL2, SL811_CTL2_HOST | SL811_CTL2_DSWAP | SL811_12M_HI);
 198                 sl811_write(SL811_CTRL1, SL811_CTRL1_SPEED_LOW | SL811_CTRL1_SOF);
 199
 200                 /* start the SOF or EOP */
 201                 sl811_write(SL811_CTRL_B, SL811_USB_CTRL_ARM);
 202                 rh_status.wPortStatus |= USB_PORT_STAT_CONNECTION | USB_PORT_STAT_LOW_SPEED;
 203                 mdelay(2);
 204                 sl811_write(SL811_INTRSTS, 0xff);
 205         }
 206
 207         rh_status.wPortChange |= USB_PORT_STAT_C_CONNECTION;
 208         sl811_write(SL811_INTR, /*SL811_INTR_INSRMV*/SL811_INTR_DONE_A);
 209
 210         return 1;
 211 }
 212
 213 int usb_lowlevel_init(void)
 214 {
 215         root_hub_devnum = 0;
 216         sl811_hc_reset();
 217         return 0;
 218 }
 219
 220 int usb_lowlevel_stop(void)
 221 {
 222         sl811_hc_reset();
 223         return 0;
 224 }
 225
 226 static int calc_needed_buswidth(int bytes, int need_preamble)
 227 {
 228         return !need_preamble ? bytes * 8 + 256 : 8 * 8 * bytes + 2048;
 229 }
 230
 231 static int sl811_send_packet(struct usb_device *dev, unsigned long pipe, __u8 *buffer, int len)
 232 {
 233         __u8 ctrl = SL811_USB_CTRL_ARM | SL811_USB_CTRL_ENABLE;
 234         __u16 status = 0;
 235         int err = 0, time_start = get_timer(0);
 236         int need_preamble = !(rh_status.wPortStatus & USB_PORT_STAT_LOW_SPEED) &&
 237                 usb_pipeslow(pipe);
 238
 239         if (len > 239)
 240                 return -1;
 241
 242         if (usb_pipeout(pipe))
 243                 ctrl |= SL811_USB_CTRL_DIR_OUT;
 244         if (usb_gettoggle(dev, usb_pipeendpoint(pipe), usb_pipeout(pipe)))
 245                 ctrl |= SL811_USB_CTRL_TOGGLE_1;
 246         if (need_preamble)
 247                 ctrl |= SL811_USB_CTRL_PREAMBLE;
 248
 249         sl811_write(SL811_INTRSTS, 0xff);
 250
 251         while (err < 3) {
 252                 sl811_write(SL811_ADDR_A, 0x10);
 253                 sl811_write(SL811_LEN_A, len);
 254                 if (usb_pipeout(pipe) && len)
 255                         sl811_write_buf(0x10, buffer, len);
 256
 257                 if (!(rh_status.wPortStatus & USB_PORT_STAT_LOW_SPEED) &&
 258                     sl811_read(SL811_SOFCNTDIV)*64 < calc_needed_buswidth(len, need_preamble))
 259                         ctrl |= SL811_USB_CTRL_SOF;
 260                 else
 261                         ctrl &= ~SL811_USB_CTRL_SOF;
 262
 263                 sl811_write(SL811_CTRL_A, ctrl);
 264                 while (!(sl811_read(SL811_INTRSTS) & SL811_INTR_DONE_A)) {
 265                         if (5*CONFIG_SYS_HZ < get_timer(time_start)) {
 266                                 printf("USB transmit timed out\n");
 267                                 return -USB_ST_CRC_ERR;
 268                         }
 269                 }
 270
 271                 sl811_write(SL811_INTRSTS, 0xff);
 272                 status = sl811_read(SL811_STS_A);
 273
 274                 if (status & SL811_USB_STS_ACK) {
 275                         int remainder = sl811_read(SL811_CNT_A);
 276                         if (remainder) {
 277                                 PDEBUG(0, "usb transfer remainder = %d\n", remainder);
 278                                 len -= remainder;
 279                         }
 280                         if (usb_pipein(pipe) && len)
 281                                 sl811_read_buf(0x10, buffer, len);
 282                         return len;
 283                 }
 284
 285                 if ((status & SL811_USB_STS_NAK) == SL811_USB_STS_NAK)
 286                         continue;
 287
 288                 PDEBUG(0, "usb transfer error %#x\n", (int)status);
 289                 err++;
 290         }
 291
 292         err = 0;
 293
 294         if (status & SL811_USB_STS_ERROR)
 295                 err |= USB_ST_BUF_ERR;
 296         if (status & SL811_USB_STS_TIMEOUT)
 297                 err |= USB_ST_CRC_ERR;
 298         if (status & SL811_USB_STS_STALL)
 299                 err |= USB_ST_STALLED;
 300
 301         return -err;
 302 }
 303
 304 int submit_bulk_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
 305                     int len)
 306 {
 307         int dir_out = usb_pipeout(pipe);
 308         int ep = usb_pipeendpoint(pipe);
 309         int max = usb_maxpacket(dev, pipe);
 310         int done = 0;
 311
 312         PDEBUG(7, "dev = %ld pipe = %ld buf = %p size = %d dir_out = %d\n",
 313                usb_pipedevice(pipe), usb_pipeendpoint(pipe), buffer, len, dir_out);
 314
 315         dev->status = 0;
 316
 317         sl811_write(SL811_DEV_A, usb_pipedevice(pipe));
 318         sl811_write(SL811_PIDEP_A, PIDEP(!dir_out ? USB_PID_IN : USB_PID_OUT, ep));
 319         while (done < len) {
 320                 int res = sl811_send_packet(dev, pipe, (__u8*)buffer+done,
 321                                             max > len - done ? len - done : max);
 322                 if (res < 0) {
 323                         dev->status = -res;
 324                         return res;
 325                 }
 326
 327                 if (!dir_out && res < max) /* short packet */
 328                         break;
 329
 330                 done += res;
 331                 usb_dotoggle(dev, ep, dir_out);
 332         }
 333
 334         dev->act_len = done;
 335
 336         return 0;
 337 }
 338
 339 int submit_control_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
 340                        int len,struct devrequest *setup)
 341 {
 342         int done = 0;
 343         int devnum = usb_pipedevice(pipe);
 344         int ep = usb_pipeendpoint(pipe);
 345
 346         dev->status = 0;
 347
 348         if (devnum == root_hub_devnum)
 349                 return sl811_rh_submit_urb(dev, pipe, buffer, len, setup);
 350
 351         PDEBUG(7, "dev = %d pipe = %ld buf = %p size = %d rt = %#x req = %#x bus = %i\n",
 352                devnum, ep, buffer, len, (int)setup->requesttype,
 353                (int)setup->request, sl811_read(SL811_SOFCNTDIV)*64);
 354
 355         sl811_write(SL811_DEV_A, devnum);
 356         sl811_write(SL811_PIDEP_A, PIDEP(USB_PID_SETUP, ep));
 357         /* setup phase */
 358         usb_settoggle(dev, ep, 1, 0);
 359         if (sl811_send_packet(dev, usb_sndctrlpipe(dev, ep),
 360                               (__u8*)setup, sizeof(*setup)) == sizeof(*setup)) {
 361                 int dir_in = usb_pipein(pipe);
 362                 int max = usb_maxpacket(dev, pipe);
 363
 364                 /* data phase */
 365                 sl811_write(SL811_PIDEP_A,
 366                             PIDEP(dir_in ? USB_PID_IN : USB_PID_OUT, ep));
 367                 usb_settoggle(dev, ep, usb_pipeout(pipe), 1);
 368                 while (done < len) {
 369                         int res = sl811_send_packet(dev, pipe, (__u8*)buffer+done,
 370                                                     max > len - done ? len - done : max);
 371                         if (res < 0) {
 372                                 PDEBUG(0, "status data failed!\n");
 373                                 dev->status = -res;
 374                                 return 0;
 375                         }
 376                         done += res;
 377                         usb_dotoggle(dev, ep, usb_pipeout(pipe));
 378                         if (dir_in && res < max) /* short packet */
 379                                 break;
 380                 }
 381
 382                 /* status phase */
 383                 sl811_write(SL811_PIDEP_A,
 384                             PIDEP(!dir_in ? USB_PID_IN : USB_PID_OUT, ep));
 385                 usb_settoggle(dev, ep, !usb_pipeout(pipe), 1);
 386                 if (sl811_send_packet(dev,
 387                                       !dir_in ? usb_rcvctrlpipe(dev, ep) :
 388                                       usb_sndctrlpipe(dev, ep),
 389                                       0, 0) < 0) {
 390                         PDEBUG(0, "status phase failed!\n");
 391                         dev->status = -1;
 392                 }
 393         } else {
 394                 PDEBUG(0, "setup phase failed!\n");
 395                 dev->status = -1;
 396         }
 397
 398         dev->act_len = done;
 399
 400         return done;
 401 }
 402
 403 int submit_int_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
 404                    int len, int interval)
 405 {
 406         PDEBUG(0, "dev = %p pipe = %#lx buf = %p size = %d int = %d\n", dev, pipe,
 407                buffer, len, interval);
 408         return -1;
 409 }
 410
 411 /*
 412  * SL811 Virtual Root Hub
 413  */
 414
 415 /* Device descriptor */
 416 static __u8 sl811_rh_dev_des[] =
 417 {
 418         0x12,       /*  __u8  bLength; */
 419         0x01,       /*  __u8  bDescriptorType; Device */
 420         0x10,       /*  __u16 bcdUSB; v1.1 */
 421         0x01,
 422         0x09,       /*  __u8  bDeviceClass; HUB_CLASSCODE */
 423         0x00,       /*  __u8  bDeviceSubClass; */
 424         0x00,       /*  __u8  bDeviceProtocol; */
 425         0x08,       /*  __u8  bMaxPacketSize0; 8 Bytes */
 426         0x00,       /*  __u16 idVendor; */
 427         0x00,
 428         0x00,       /*  __u16 idProduct; */
 429         0x00,
 430         0x00,       /*  __u16 bcdDevice; */
 431         0x00,
 432         0x00,       /*  __u8  iManufacturer; */
 433         0x02,       /*  __u8  iProduct; */
 434         0x01,       /*  __u8  iSerialNumber; */
 435         0x01        /*  __u8  bNumConfigurations; */
 436 };
 437
 438 /* Configuration descriptor */
 439 static __u8 sl811_rh_config_des[] =
 440 {
 441         0x09,       /*  __u8  bLength; */
 442         0x02,       /*  __u8  bDescriptorType; Configuration */
 443         0x19,       /*  __u16 wTotalLength; */
 444         0x00,
 445         0x01,       /*  __u8  bNumInterfaces; */
 446         0x01,       /*  __u8  bConfigurationValue; */
 447         0x00,       /*  __u8  iConfiguration; */
 448         0x40,       /*  __u8  bmAttributes;
 449                     Bit 7: Bus-powered, 6: Self-powered, 5 Remote-wakwup,
 450                     4..0: resvd */
 451         0x00,       /*  __u8  MaxPower; */
 452
 453         /* interface */
 454         0x09,       /*  __u8  if_bLength; */
 455         0x04,       /*  __u8  if_bDescriptorType; Interface */
 456         0x00,       /*  __u8  if_bInterfaceNumber; */
 457         0x00,       /*  __u8  if_bAlternateSetting; */
 458         0x01,       /*  __u8  if_bNumEndpoints; */
 459         0x09,       /*  __u8  if_bInterfaceClass; HUB_CLASSCODE */
 460         0x00,       /*  __u8  if_bInterfaceSubClass; */
 461         0x00,       /*  __u8  if_bInterfaceProtocol; */
 462         0x00,       /*  __u8  if_iInterface; */
 463
 464         /* endpoint */
 465         0x07,       /*  __u8  ep_bLength; */
 466         0x05,       /*  __u8  ep_bDescriptorType; Endpoint */
 467         0x81,       /*  __u8  ep_bEndpointAddress; IN Endpoint 1 */
 468         0x03,       /*  __u8  ep_bmAttributes; Interrupt */
 469         0x08,       /*  __u16 ep_wMaxPacketSize; */
 470         0x00,
 471         0xff        /*  __u8  ep_bInterval; 255 ms */
 472 };
 473
 474 /* root hub class descriptor*/
 475 static __u8 sl811_rh_hub_des[] =
 476 {
 477         0x09,                   /*  __u8  bLength; */
 478         0x29,                   /*  __u8  bDescriptorType; Hub-descriptor */
 479         0x01,                   /*  __u8  bNbrPorts; */
 480         0x00,                   /* __u16  wHubCharacteristics; */
 481         0x00,
 482         0x50,                   /*  __u8  bPwrOn2pwrGood; 2ms */
 483         0x00,                   /*  __u8  bHubContrCurrent; 0 mA */
 484         0xfc,                   /*  __u8  DeviceRemovable; *** 7 Ports max *** */
 485         0xff                    /*  __u8  PortPwrCtrlMask; *** 7 ports max *** */
 486 };
 487
 488 /*
 489  * helper routine for returning string descriptors in UTF-16LE
 490  * input can actually be ISO-8859-1; ASCII is its 7-bit subset
 491  */
 492 static int ascii2utf (char *s, u8 *utf, int utfmax)
 493 {
 494         int retval;
 495
 496         for (retval = 0; *s && utfmax > 1; utfmax -= 2, retval += 2) {
 497                 *utf++ = *s++;
 498                 *utf++ = 0;
 499         }
 500         return retval;
 501 }
 502
 503 /*
 504  * root_hub_string is used by each host controller's root hub code,
 505  * so that they're identified consistently throughout the system.
 506  */
 507 static int usb_root_hub_string (int id, int serial, char *type, __u8 *data, int len)
 508 {
 509         char buf [30];
 510
 511         /* assert (len > (2 * (sizeof (buf) + 1)));
 512            assert (strlen (type) <= 8);*/
 513
 514         /* language ids */
 515         if (id == 0) {
 516                 *data++ = 4; *data++ = 3;       /* 4 bytes data */
 517                 *data++ = 0; *data++ = 0;       /* some language id */
 518                 return 4;
 519
 520         /* serial number */
 521         } else if (id == 1) {
 522                 sprintf (buf, "%#x", serial);
 523
 524         /* product description */
 525         } else if (id == 2) {
 526                 sprintf (buf, "USB %s Root Hub", type);
 527
 528         /* id 3 == vendor description */
 529
 530         /* unsupported IDs --> "stall" */
 531         } else
 532             return 0;
 533
 534         ascii2utf (buf, data + 2, len - 2);
 535         data [0] = 2 + strlen(buf) * 2;
 536         data [1] = 3;
 537         return data [0];
 538 }
 539
 540 /* helper macro */
 541 #define OK(x)   len = (x); break
 542
 543 /*
 544  * This function handles all USB request to the the virtual root hub
 545  */
 546 static int sl811_rh_submit_urb(struct usb_device *usb_dev, unsigned long pipe,
 547                                void *data, int buf_len, struct devrequest *cmd)
 548 {
 549         __u8 data_buf[16];
 550         __u8 *bufp = data_buf;
 551         int len = 0;
 552         int status = 0;
 553         __u16 bmRType_bReq;
 554         __u16 wValue  = le16_to_cpu (cmd->value);
 555         __u16 wLength = le16_to_cpu (cmd->length);
 556 #ifdef SL811_DEBUG
 557         __u16 wIndex  = le16_to_cpu (cmd->index);
 558 #endif
 559
 560         if (usb_pipeint(pipe)) {
 561                 PDEBUG(0, "interrupt transfer unimplemented!\n");
 562                 return 0;
 563         }
 564
 565         bmRType_bReq  = cmd->requesttype | (cmd->request << 8);
 566
 567         PDEBUG(5, "submit rh urb, req = %d(%x) val = %#x index = %#x len=%d\n",
 568                bmRType_bReq, bmRType_bReq, wValue, wIndex, wLength);
 569
 570         /* Request Destination:
 571                    without flags: Device,
 572                    USB_RECIP_INTERFACE: interface,
 573                    USB_RECIP_ENDPOINT: endpoint,
 574                    USB_TYPE_CLASS means HUB here,
 575                    USB_RECIP_OTHER | USB_TYPE_CLASS  almost ever means HUB_PORT here
 576         */
 577         switch (bmRType_bReq) {
 578         case RH_GET_STATUS:
 579                 *(__u16 *)bufp = cpu_to_le16(1);
 580                 OK(2);
 581
 582         case RH_GET_STATUS | USB_RECIP_INTERFACE:
 583                 *(__u16 *)bufp = cpu_to_le16(0);
 584                 OK(2);
 585
 586         case RH_GET_STATUS | USB_RECIP_ENDPOINT:
 587                 *(__u16 *)bufp = cpu_to_le16(0);
 588                 OK(2);
 589
 590         case RH_GET_STATUS | USB_TYPE_CLASS:
 591                 *(__u32 *)bufp = cpu_to_le32(0);
 592                 OK(4);
 593
 594         case RH_GET_STATUS | USB_RECIP_OTHER | USB_TYPE_CLASS:
 595                 *(__u32 *)bufp = cpu_to_le32(rh_status.wPortChange<<16 | rh_status.wPortStatus);
 596                 OK(4);
 597
 598         case RH_CLEAR_FEATURE | USB_RECIP_ENDPOINT:
 599                 switch (wValue) {
 600                 case 1:
 601                         OK(0);
 602                 }
 603                 break;
 604
 605         case RH_CLEAR_FEATURE | USB_TYPE_CLASS:
 606                 switch (wValue) {
 607                 case C_HUB_LOCAL_POWER:
 608                         OK(0);
 609
 610                 case C_HUB_OVER_CURRENT:
 611                         OK(0);
 612                 }
 613                 break;
 614
 615         case RH_CLEAR_FEATURE | USB_RECIP_OTHER | USB_TYPE_CLASS:
 616                 switch (wValue) {
 617                 case USB_PORT_FEAT_ENABLE:
 618                         rh_status.wPortStatus &= ~USB_PORT_STAT_ENABLE;
 619                         OK(0);
 620
 621                 case USB_PORT_FEAT_SUSPEND:
 622                         rh_status.wPortStatus &= ~USB_PORT_STAT_SUSPEND;
 623                         OK(0);
 624
 625                 case USB_PORT_FEAT_POWER:
 626                         rh_status.wPortStatus &= ~USB_PORT_STAT_POWER;
 627                         OK(0);
 628
 629                 case USB_PORT_FEAT_C_CONNECTION:
 630                         rh_status.wPortChange &= ~USB_PORT_STAT_C_CONNECTION;
 631                         OK(0);
 632
 633                 case USB_PORT_FEAT_C_ENABLE:
 634                         rh_status.wPortChange &= ~USB_PORT_STAT_C_ENABLE;
 635                         OK(0);
 636
 637                 case USB_PORT_FEAT_C_SUSPEND:
 638                         rh_status.wPortChange &= ~USB_PORT_STAT_C_SUSPEND;
 639                         OK(0);
 640
 641                 case USB_PORT_FEAT_C_OVER_CURRENT:
 642                         rh_status.wPortChange &= ~USB_PORT_STAT_C_OVERCURRENT;
 643                         OK(0);
 644
 645                 case USB_PORT_FEAT_C_RESET:
 646                         rh_status.wPortChange &= ~USB_PORT_STAT_C_RESET;
 647                         OK(0);
 648                 }
 649                 break;
 650
 651         case RH_SET_FEATURE | USB_RECIP_OTHER | USB_TYPE_CLASS:
 652                 switch (wValue) {
 653                 case USB_PORT_FEAT_SUSPEND:
 654                         rh_status.wPortStatus |= USB_PORT_STAT_SUSPEND;
 655                         OK(0);
 656
 657                 case USB_PORT_FEAT_RESET:
 658                         rh_status.wPortStatus |= USB_PORT_STAT_RESET;
 659                         rh_status.wPortChange = 0;
 660                         rh_status.wPortChange |= USB_PORT_STAT_C_RESET;
 661                         rh_status.wPortStatus &= ~USB_PORT_STAT_RESET;
 662                         rh_status.wPortStatus |= USB_PORT_STAT_ENABLE;
 663                         OK(0);
 664
 665                 case USB_PORT_FEAT_POWER:
 666                         rh_status.wPortStatus |= USB_PORT_STAT_POWER;
 667                         OK(0);
 668
 669                 case USB_PORT_FEAT_ENABLE:
 670                         rh_status.wPortStatus |= USB_PORT_STAT_ENABLE;
 671                         OK(0);
 672                 }
 673                 break;
 674
 675         case RH_SET_ADDRESS:
 676                 root_hub_devnum = wValue;
 677                 OK(0);
 678
 679         case RH_GET_DESCRIPTOR:
 680                 switch ((wValue & 0xff00) >> 8) {
 681                 case USB_DT_DEVICE:
 682                         len = sizeof(sl811_rh_dev_des);
 683                         bufp = sl811_rh_dev_des;
 684                         OK(len);
 685
 686                 case USB_DT_CONFIG:
 687                         len = sizeof(sl811_rh_config_des);
 688                         bufp = sl811_rh_config_des;
 689                         OK(len);
 690
 691                 case USB_DT_STRING:
 692                         len = usb_root_hub_string(wValue & 0xff, (int)(long)0,  "SL811HS", data, wLength);
 693                         if (len > 0) {
 694                                 bufp = data;
 695                                 OK(len);
 696                         }
 697
 698                 default:
 699                         status = -32;
 700                 }
 701                 break;
 702
 703         case RH_GET_DESCRIPTOR | USB_TYPE_CLASS:
 704                 len = sizeof(sl811_rh_hub_des);
 705                 bufp = sl811_rh_hub_des;
 706                 OK(len);
 707
 708         case RH_GET_CONFIGURATION:
 709                 bufp[0] = 0x01;
 710                 OK(1);
 711
 712         case RH_SET_CONFIGURATION:
 713                 OK(0);
 714
 715         default:
 716                 PDEBUG(1, "unsupported root hub command\n");
 717                 status = -32;
 718         }
 719
 720         len = min(len, buf_len);
 721         if (data != bufp)
 722                 memcpy(data, bufp, len);
 723
 724         PDEBUG(5, "len = %d, status = %d\n", len, status);
 725
 726         usb_dev->status = status;
 727         usb_dev->act_len = len;
 728
 729         return status == 0 ? len : status;
 730 }