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 static int calc_needed_buswidth(int bytes, int need_preamble)
 230 {
 231         return !need_preamble ? bytes * 8 + 256 : 8 * 8 * bytes + 2048;
 232 }
 233
 234 static int sl811_send_packet(struct usb_device *dev, unsigned long pipe, __u8 *buffer, int len)
 235 {
 236         __u8 ctrl = SL811_USB_CTRL_ARM | SL811_USB_CTRL_ENABLE;
 237         __u16 status = 0;
 238         int err = 0, time_start = get_timer(0);
 239         int need_preamble = !(rh_status.wPortStatus & USB_PORT_STAT_LOW_SPEED) &&
 240                 usb_pipeslow(pipe);
 241
 242         if (len > 239)
 243                 return -1;
 244
 245         if (usb_pipeout(pipe))
 246                 ctrl |= SL811_USB_CTRL_DIR_OUT;
 247         if (usb_gettoggle(dev, usb_pipeendpoint(pipe), usb_pipeout(pipe)))
 248                 ctrl |= SL811_USB_CTRL_TOGGLE_1;
 249         if (need_preamble)
 250                 ctrl |= SL811_USB_CTRL_PREAMBLE;
 251
 252         sl811_write(SL811_INTRSTS, 0xff);
 253
 254         while (err < 3) {
 255                 sl811_write(SL811_ADDR_A, 0x10);
 256                 sl811_write(SL811_LEN_A, len);
 257                 if (usb_pipeout(pipe) && len)
 258                         sl811_write_buf(0x10, buffer, len);
 259
 260                 if (!(rh_status.wPortStatus & USB_PORT_STAT_LOW_SPEED) &&
 261                     sl811_read(SL811_SOFCNTDIV)*64 < calc_needed_buswidth(len, need_preamble))
 262                         ctrl |= SL811_USB_CTRL_SOF;
 263                 else
 264                         ctrl &= ~SL811_USB_CTRL_SOF;
 265
 266                 sl811_write(SL811_CTRL_A, ctrl);
 267                 while (!(sl811_read(SL811_INTRSTS) & SL811_INTR_DONE_A)) {
 268                         if (5*CFG_HZ < get_timer(time_start)) {
 269                                 printf("USB transmit timed out\n");
 270                                 return -USB_ST_CRC_ERR;
 271                         }
 272                 }
 273
 274                 sl811_write(SL811_INTRSTS, 0xff);
 275                 status = sl811_read(SL811_STS_A);
 276
 277                 if (status & SL811_USB_STS_ACK) {
 278                         int remainder = sl811_read(SL811_CNT_A);
 279                         if (remainder) {
 280                                 PDEBUG(0, "usb transfer remainder = %d\n", remainder);
 281                                 len -= remainder;
 282                         }
 283                         if (usb_pipein(pipe) && len)
 284                                 sl811_read_buf(0x10, buffer, len);
 285                         return len;
 286                 }
 287
 288                 if ((status & SL811_USB_STS_NAK) == SL811_USB_STS_NAK)
 289                         continue;
 290
 291                 PDEBUG(0, "usb transfer error %#x\n", (int)status);
 292                 err++;
 293         }
 294
 295         err = 0;
 296
 297         if (status & SL811_USB_STS_ERROR)
 298                 err |= USB_ST_BUF_ERR;
 299         if (status & SL811_USB_STS_TIMEOUT)
 300                 err |= USB_ST_CRC_ERR;
 301         if (status & SL811_USB_STS_STALL)
 302                 err |= USB_ST_STALLED;
 303
 304         return -err;
 305 }
 306
 307 int submit_bulk_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
 308                     int len)
 309 {
 310         int dir_out = usb_pipeout(pipe);
 311         int ep = usb_pipeendpoint(pipe);
 312         int max = usb_maxpacket(dev, pipe);
 313         int done = 0;
 314
 315         PDEBUG(7, "dev = %ld pipe = %ld buf = %p size = %d dir_out = %d\n",
 316                usb_pipedevice(pipe), usb_pipeendpoint(pipe), buffer, len, dir_out);
 317
 318         dev->status = 0;
 319
 320         sl811_write(SL811_DEV_A, usb_pipedevice(pipe));
 321         sl811_write(SL811_PIDEP_A, PIDEP(!dir_out ? USB_PID_IN : USB_PID_OUT, ep));
 322         while (done < len) {
 323                 int res = sl811_send_packet(dev, pipe, (__u8*)buffer+done,
 324                                             max > len - done ? len - done : max);
 325                 if (res < 0) {
 326                         dev->status = -res;
 327                         return res;
 328                 }
 329
 330                 if (!dir_out && res < max) /* short packet */
 331                         break;
 332
 333                 done += res;
 334                 usb_dotoggle(dev, ep, dir_out);
 335         }
 336
 337         dev->act_len = done;
 338
 339         return 0;
 340 }
 341
 342 int submit_control_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
 343                        int len,struct devrequest *setup)
 344 {
 345         int done = 0;
 346         int devnum = usb_pipedevice(pipe);
 347         int ep = usb_pipeendpoint(pipe);
 348
 349         dev->status = 0;
 350
 351         if (devnum == root_hub_devnum)
 352                 return sl811_rh_submit_urb(dev, pipe, buffer, len, setup);
 353
 354         PDEBUG(7, "dev = %d pipe = %ld buf = %p size = %d rt = %#x req = %#x bus = %i\n",
 355                devnum, ep, buffer, len, (int)setup->requesttype,
 356                (int)setup->request, sl811_read(SL811_SOFCNTDIV)*64);
 357
 358         sl811_write(SL811_DEV_A, devnum);
 359         sl811_write(SL811_PIDEP_A, PIDEP(USB_PID_SETUP, ep));
 360         /* setup phase */
 361         usb_settoggle(dev, ep, 1, 0);
 362         if (sl811_send_packet(dev, usb_sndctrlpipe(dev, ep),
 363                               (__u8*)setup, sizeof(*setup)) == sizeof(*setup)) {
 364                 int dir_in = usb_pipein(pipe);
 365                 int max = usb_maxpacket(dev, pipe);
 366
 367                 /* data phase */
 368                 sl811_write(SL811_PIDEP_A,
 369                             PIDEP(dir_in ? USB_PID_IN : USB_PID_OUT, ep));
 370                 usb_settoggle(dev, ep, usb_pipeout(pipe), 1);
 371                 while (done < len) {
 372                         int res = sl811_send_packet(dev, pipe, (__u8*)buffer+done,
 373                                                     max > len - done ? len - done : max);
 374                         if (res < 0) {
 375                                 PDEBUG(0, "status data failed!\n");
 376                                 dev->status = -res;
 377                                 return 0;
 378                         }
 379                         done += res;
 380                         usb_dotoggle(dev, ep, usb_pipeout(pipe));
 381                         if (dir_in && res < max) /* short packet */
 382                                 break;
 383                 }
 384
 385                 /* status phase */
 386                 sl811_write(SL811_PIDEP_A,
 387                             PIDEP(!dir_in ? USB_PID_IN : USB_PID_OUT, ep));
 388                 usb_settoggle(dev, ep, !usb_pipeout(pipe), 1);
 389                 if (sl811_send_packet(dev,
 390                                       !dir_in ? usb_rcvctrlpipe(dev, ep) :
 391                                       usb_sndctrlpipe(dev, ep),
 392                                       0, 0) < 0) {
 393                         PDEBUG(0, "status phase failed!\n");
 394                         dev->status = -1;
 395                 }
 396         } else {
 397                 PDEBUG(0, "setup phase failed!\n");
 398                 dev->status = -1;
 399         }
 400
 401         dev->act_len = done;
 402
 403         return done;
 404 }
 405
 406 int submit_int_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
 407                    int len, int interval)
 408 {
 409         PDEBUG(0, "dev = %p pipe = %#lx buf = %p size = %d int = %d\n", dev, pipe,
 410                buffer, len, interval);
 411         return -1;
 412 }
 413
 414 /*
 415  * SL811 Virtual Root Hub
 416  */
 417
 418 /* Device descriptor */
 419 static __u8 sl811_rh_dev_des[] =
 420 {
 421         0x12,       /*  __u8  bLength; */
 422         0x01,       /*  __u8  bDescriptorType; Device */
 423         0x10,       /*  __u16 bcdUSB; v1.1 */
 424         0x01,
 425         0x09,       /*  __u8  bDeviceClass; HUB_CLASSCODE */
 426         0x00,       /*  __u8  bDeviceSubClass; */
 427         0x00,       /*  __u8  bDeviceProtocol; */
 428         0x08,       /*  __u8  bMaxPacketSize0; 8 Bytes */
 429         0x00,       /*  __u16 idVendor; */
 430         0x00,
 431         0x00,       /*  __u16 idProduct; */
 432         0x00,
 433         0x00,       /*  __u16 bcdDevice; */
 434         0x00,
 435         0x00,       /*  __u8  iManufacturer; */
 436         0x02,       /*  __u8  iProduct; */
 437         0x01,       /*  __u8  iSerialNumber; */
 438         0x01        /*  __u8  bNumConfigurations; */
 439 };
 440
 441 /* Configuration descriptor */
 442 static __u8 sl811_rh_config_des[] =
 443 {
 444         0x09,       /*  __u8  bLength; */
 445         0x02,       /*  __u8  bDescriptorType; Configuration */
 446         0x19,       /*  __u16 wTotalLength; */
 447         0x00,
 448         0x01,       /*  __u8  bNumInterfaces; */
 449         0x01,       /*  __u8  bConfigurationValue; */
 450         0x00,       /*  __u8  iConfiguration; */
 451         0x40,       /*  __u8  bmAttributes;
 452                     Bit 7: Bus-powered, 6: Self-powered, 5 Remote-wakwup,
 453                     4..0: resvd */
 454         0x00,       /*  __u8  MaxPower; */
 455
 456         /* interface */
 457         0x09,       /*  __u8  if_bLength; */
 458         0x04,       /*  __u8  if_bDescriptorType; Interface */
 459         0x00,       /*  __u8  if_bInterfaceNumber; */
 460         0x00,       /*  __u8  if_bAlternateSetting; */
 461         0x01,       /*  __u8  if_bNumEndpoints; */
 462         0x09,       /*  __u8  if_bInterfaceClass; HUB_CLASSCODE */
 463         0x00,       /*  __u8  if_bInterfaceSubClass; */
 464         0x00,       /*  __u8  if_bInterfaceProtocol; */
 465         0x00,       /*  __u8  if_iInterface; */
 466
 467         /* endpoint */
 468         0x07,       /*  __u8  ep_bLength; */
 469         0x05,       /*  __u8  ep_bDescriptorType; Endpoint */
 470         0x81,       /*  __u8  ep_bEndpointAddress; IN Endpoint 1 */
 471         0x03,       /*  __u8  ep_bmAttributes; Interrupt */
 472         0x08,       /*  __u16 ep_wMaxPacketSize; */
 473         0x00,
 474         0xff        /*  __u8  ep_bInterval; 255 ms */
 475 };
 476
 477 /* root hub class descriptor*/
 478 static __u8 sl811_rh_hub_des[] =
 479 {
 480         0x09,                   /*  __u8  bLength; */
 481         0x29,                   /*  __u8  bDescriptorType; Hub-descriptor */
 482         0x01,                   /*  __u8  bNbrPorts; */
 483         0x00,                   /* __u16  wHubCharacteristics; */
 484         0x00,
 485         0x50,                   /*  __u8  bPwrOn2pwrGood; 2ms */
 486         0x00,                   /*  __u8  bHubContrCurrent; 0 mA */
 487         0xfc,                   /*  __u8  DeviceRemovable; *** 7 Ports max *** */
 488         0xff                    /*  __u8  PortPwrCtrlMask; *** 7 ports max *** */
 489 };
 490
 491 /*
 492  * helper routine for returning string descriptors in UTF-16LE
 493  * input can actually be ISO-8859-1; ASCII is its 7-bit subset
 494  */
 495 static int ascii2utf (char *s, u8 *utf, int utfmax)
 496 {
 497         int retval;
 498
 499         for (retval = 0; *s && utfmax > 1; utfmax -= 2, retval += 2) {
 500                 *utf++ = *s++;
 501                 *utf++ = 0;
 502         }
 503         return retval;
 504 }
 505
 506 /*
 507  * root_hub_string is used by each host controller's root hub code,
 508  * so that they're identified consistently throughout the system.
 509  */
 510 static int usb_root_hub_string (int id, int serial, char *type, __u8 *data, int len)
 511 {
 512         char buf [30];
 513
 514         /* assert (len > (2 * (sizeof (buf) + 1)));
 515            assert (strlen (type) <= 8);*/
 516
 517         /* language ids */
 518         if (id == 0) {
 519                 *data++ = 4; *data++ = 3;       /* 4 bytes data */
 520                 *data++ = 0; *data++ = 0;       /* some language id */
 521                 return 4;
 522
 523         /* serial number */
 524         } else if (id == 1) {
 525                 sprintf (buf, "%#x", serial);
 526
 527         /* product description */
 528         } else if (id == 2) {
 529                 sprintf (buf, "USB %s Root Hub", type);
 530
 531         /* id 3 == vendor description */
 532
 533         /* unsupported IDs --> "stall" */
 534         } else
 535             return 0;
 536
 537         ascii2utf (buf, data + 2, len - 2);
 538         data [0] = 2 + strlen(buf) * 2;
 539         data [1] = 3;
 540         return data [0];
 541 }
 542
 543 /* helper macro */
 544 #define OK(x)   len = (x); break
 545
 546 /*
 547  * This function handles all USB request to the the virtual root hub
 548  */
 549 static int sl811_rh_submit_urb(struct usb_device *usb_dev, unsigned long pipe,
 550                                void *data, int buf_len, struct devrequest *cmd)
 551 {
 552         __u8 data_buf[16];
 553         __u8 *bufp = data_buf;
 554         int len = 0;
 555         int status = 0;
 556
 557         __u16 bmRType_bReq;
 558         __u16 wValue;
 559         __u16 wIndex;
 560         __u16 wLength;
 561
 562         if (usb_pipeint(pipe)) {
 563                 PDEBUG(0, "interrupt transfer unimplemented!\n");
 564                 return 0;
 565         }
 566
 567         bmRType_bReq  = cmd->requesttype | (cmd->request << 8);
 568         wValue        = le16_to_cpu (cmd->value);
 569         wIndex        = le16_to_cpu (cmd->index);
 570         wLength       = le16_to_cpu (cmd->length);
 571
 572         PDEBUG(5, "submit rh urb, req = %d(%x) val = %#x index = %#x len=%d\n",
 573                bmRType_bReq, bmRType_bReq, wValue, wIndex, wLength);
 574
 575         /* Request Destination:
 576                    without flags: Device,
 577                    USB_RECIP_INTERFACE: interface,
 578                    USB_RECIP_ENDPOINT: endpoint,
 579                    USB_TYPE_CLASS means HUB here,
 580                    USB_RECIP_OTHER | USB_TYPE_CLASS  almost ever means HUB_PORT here
 581         */
 582         switch (bmRType_bReq) {
 583         case RH_GET_STATUS:
 584                 *(__u16 *)bufp = cpu_to_le16(1);
 585                 OK(2);
 586
 587         case RH_GET_STATUS | USB_RECIP_INTERFACE:
 588                 *(__u16 *)bufp = cpu_to_le16(0);
 589                 OK(2);
 590
 591         case RH_GET_STATUS | USB_RECIP_ENDPOINT:
 592                 *(__u16 *)bufp = cpu_to_le16(0);
 593                 OK(2);
 594
 595         case RH_GET_STATUS | USB_TYPE_CLASS:
 596                 *(__u32 *)bufp = cpu_to_le32(0);
 597                 OK(4);
 598
 599         case RH_GET_STATUS | USB_RECIP_OTHER | USB_TYPE_CLASS:
 600                 *(__u32 *)bufp = cpu_to_le32(rh_status.wPortChange<<16 | rh_status.wPortStatus);
 601                 OK(4);
 602
 603         case RH_CLEAR_FEATURE | USB_RECIP_ENDPOINT:
 604                 switch (wValue) {
 605                 case 1:
 606                         OK(0);
 607                 }
 608                 break;
 609
 610         case RH_CLEAR_FEATURE | USB_TYPE_CLASS:
 611                 switch (wValue) {
 612                 case C_HUB_LOCAL_POWER:
 613                         OK(0);
 614
 615                 case C_HUB_OVER_CURRENT:
 616                         OK(0);
 617                 }
 618                 break;
 619
 620         case RH_CLEAR_FEATURE | USB_RECIP_OTHER | USB_TYPE_CLASS:
 621                 switch (wValue) {
 622                 case USB_PORT_FEAT_ENABLE:
 623                         rh_status.wPortStatus &= ~USB_PORT_STAT_ENABLE;
 624                         OK(0);
 625
 626                 case USB_PORT_FEAT_SUSPEND:
 627                         rh_status.wPortStatus &= ~USB_PORT_STAT_SUSPEND;
 628                         OK(0);
 629
 630                 case USB_PORT_FEAT_POWER:
 631                         rh_status.wPortStatus &= ~USB_PORT_STAT_POWER;
 632                         OK(0);
 633
 634                 case USB_PORT_FEAT_C_CONNECTION:
 635                         rh_status.wPortChange &= ~USB_PORT_STAT_C_CONNECTION;
 636                         OK(0);
 637
 638                 case USB_PORT_FEAT_C_ENABLE:
 639                         rh_status.wPortChange &= ~USB_PORT_STAT_C_ENABLE;
 640                         OK(0);
 641
 642                 case USB_PORT_FEAT_C_SUSPEND:
 643                         rh_status.wPortChange &= ~USB_PORT_STAT_C_SUSPEND;
 644                         OK(0);
 645
 646                 case USB_PORT_FEAT_C_OVER_CURRENT:
 647                         rh_status.wPortChange &= ~USB_PORT_STAT_C_OVERCURRENT;
 648                         OK(0);
 649
 650                 case USB_PORT_FEAT_C_RESET:
 651                         rh_status.wPortChange &= ~USB_PORT_STAT_C_RESET;
 652                         OK(0);
 653                 }
 654                 break;
 655
 656         case RH_SET_FEATURE | USB_RECIP_OTHER | USB_TYPE_CLASS:
 657                 switch (wValue) {
 658                 case USB_PORT_FEAT_SUSPEND:
 659                         rh_status.wPortStatus |= USB_PORT_STAT_SUSPEND;
 660                         OK(0);
 661
 662                 case USB_PORT_FEAT_RESET:
 663                         rh_status.wPortStatus |= USB_PORT_STAT_RESET;
 664                         rh_status.wPortChange = 0;
 665                         rh_status.wPortChange |= USB_PORT_STAT_C_RESET;
 666                         rh_status.wPortStatus &= ~USB_PORT_STAT_RESET;
 667                         rh_status.wPortStatus |= USB_PORT_STAT_ENABLE;
 668                         OK(0);
 669
 670                 case USB_PORT_FEAT_POWER:
 671                         rh_status.wPortStatus |= USB_PORT_STAT_POWER;
 672                         OK(0);
 673
 674                 case USB_PORT_FEAT_ENABLE:
 675                         rh_status.wPortStatus |= USB_PORT_STAT_ENABLE;
 676                         OK(0);
 677                 }
 678                 break;
 679
 680         case RH_SET_ADDRESS:
 681                 root_hub_devnum = wValue;
 682                 OK(0);
 683
 684         case RH_GET_DESCRIPTOR:
 685                 switch ((wValue & 0xff00) >> 8) {
 686                 case USB_DT_DEVICE:
 687                         len = sizeof(sl811_rh_dev_des);
 688                         bufp = sl811_rh_dev_des;
 689                         OK(len);
 690
 691                 case USB_DT_CONFIG:
 692                         len = sizeof(sl811_rh_config_des);
 693                         bufp = sl811_rh_config_des;
 694                         OK(len);
 695
 696                 case USB_DT_STRING:
 697                         len = usb_root_hub_string(wValue & 0xff, (int)(long)0,  "SL811HS", data, wLength);
 698                         if (len > 0) {
 699                                 bufp = data;
 700                                 OK(len);
 701                         }
 702
 703                 default:
 704                         status = -32;
 705                 }
 706                 break;
 707
 708         case RH_GET_DESCRIPTOR | USB_TYPE_CLASS:
 709                 len = sizeof(sl811_rh_hub_des);
 710                 bufp = sl811_rh_hub_des;
 711                 OK(len);
 712
 713         case RH_GET_CONFIGURATION:
 714                 bufp[0] = 0x01;
 715                 OK(1);
 716
 717         case RH_SET_CONFIGURATION:
 718                 OK(0);
 719
 720         default:
 721                 PDEBUG(1, "unsupported root hub command\n");
 722                 status = -32;
 723         }
 724
 725         len = min(len, buf_len);
 726         if (data != bufp)
 727                 memcpy(data, bufp, len);
 728
 729         PDEBUG(5, "len = %d, status = %d\n", len, status);
 730
 731         usb_dev->status = status;
 732         usb_dev->act_len = len;
 733
 734         return status == 0 ? len : status;
 735 }
 736
 737 #endif  /* CONFIG_USB_SL811HS */