uboot/drivers/usb/host/sl811-hcd.c
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   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 * SPDX-License-Identifier:     GPL-2.0+
  20 */
  21
  22#include <common.h>
  23#include <mpc8xx.h>
  24#include <usb.h>
  25#include "sl811.h"
  26
  27#include "../../../board/kup/common/kup.h"
  28
  29#ifdef __PPC__
  30# define EIEIO          __asm__ volatile ("eieio")
  31#else
  32# define EIEIO          /* nothing */
  33#endif
  34
  35#define  SL811_ADR (0x50000000)
  36#define  SL811_DAT (0x50000001)
  37
  38#ifdef SL811_DEBUG
  39static int debug = 9;
  40#endif
  41
  42static int root_hub_devnum = 0;
  43static struct usb_port_status rh_status = { 0 };/* root hub port status */
  44
  45static int sl811_rh_submit_urb(struct usb_device *usb_dev, unsigned long pipe,
  46                               void *data, int buf_len, struct devrequest *cmd);
  47
  48static void sl811_write (__u8 index, __u8 data)
  49{
  50        *(volatile unsigned char *) (SL811_ADR) = index;
  51        EIEIO;
  52        *(volatile unsigned char *) (SL811_DAT) = data;
  53        EIEIO;
  54}
  55
  56static __u8 sl811_read (__u8 index)
  57{
  58        __u8 data;
  59
  60        *(volatile unsigned char *) (SL811_ADR) = index;
  61        EIEIO;
  62        data = *(volatile unsigned char *) (SL811_DAT);
  63        EIEIO;
  64        return (data);
  65}
  66
  67/*
  68 * Read consecutive bytes of data from the SL811H/SL11H buffer
  69 */
  70static void inline sl811_read_buf(__u8 offset, __u8 *buf, __u8 size)
  71{
  72        *(volatile unsigned char *) (SL811_ADR) = offset;
  73        EIEIO;
  74        while (size--) {
  75                *buf++ = *(volatile unsigned char *) (SL811_DAT);
  76                EIEIO;
  77        }
  78}
  79
  80/*
  81 * Write consecutive bytes of data to the SL811H/SL11H buffer
  82 */
  83static void inline sl811_write_buf(__u8 offset, __u8 *buf, __u8 size)
  84{
  85        *(volatile unsigned char *) (SL811_ADR) = offset;
  86        EIEIO;
  87        while (size--) {
  88                *(volatile unsigned char *) (SL811_DAT) = *buf++;
  89                EIEIO;
  90        }
  91}
  92
  93int usb_init_kup4x (void)
  94{
  95        volatile immap_t *immap = (immap_t *) CONFIG_SYS_IMMR;
  96        volatile memctl8xx_t *memctl = &immap->im_memctl;
  97        int i;
  98        unsigned char tmp;
  99
 100        memctl = &immap->im_memctl;
 101        memctl->memc_or7 = 0xFFFF8726;
 102        memctl->memc_br7 = 0x50000401;  /* start at 0x50000000 */
 103        /* BP 14 low = USB ON */
 104        immap->im_cpm.cp_pbdat &= ~(BP_USB_VCC);
 105        /* PB 14 nomal port */
 106        immap->im_cpm.cp_pbpar &= ~(BP_USB_VCC);
 107        /* output */
 108        immap->im_cpm.cp_pbdir |= (BP_USB_VCC);
 109
 110        puts ("USB:   ");
 111
 112        for (i = 0x10; i < 0xff; i++) {
 113                sl811_write(i, i);
 114                tmp = (sl811_read(i));
 115                if (tmp != i) {
 116                        printf ("SL811 compare error index=0x%02x read=0x%02x\n", i, tmp);
 117                        return (-1);
 118                }
 119        }
 120        printf ("SL811 ready\n");
 121        return (0);
 122}
 123
 124/*
 125 * This function resets SL811HS controller and detects the speed of
 126 * the connecting device
 127 *
 128 * Return: 0 = no device attached; 1 = USB device attached
 129 */
 130static int sl811_hc_reset(void)
 131{
 132        int status ;
 133
 134        sl811_write(SL811_CTRL2, SL811_CTL2_HOST | SL811_12M_HI);
 135        sl811_write(SL811_CTRL1, SL811_CTRL1_RESET);
 136
 137        mdelay(20);
 138
 139        /* Disable hardware SOF generation, clear all irq status. */
 140        sl811_write(SL811_CTRL1, 0);
 141        mdelay(2);
 142        sl811_write(SL811_INTRSTS, 0xff);
 143        status = sl811_read(SL811_INTRSTS);
 144
 145        if (status & SL811_INTR_NOTPRESENT) {
 146                /* Device is not present */
 147                PDEBUG(0, "Device not present\n");
 148                rh_status.wPortStatus &= ~(USB_PORT_STAT_CONNECTION | USB_PORT_STAT_ENABLE);
 149                rh_status.wPortChange |= USB_PORT_STAT_C_CONNECTION;
 150                sl811_write(SL811_INTR, SL811_INTR_INSRMV);
 151                return 0;
 152        }
 153
 154        /* Send SOF to address 0, endpoint 0. */
 155        sl811_write(SL811_LEN_B, 0);
 156        sl811_write(SL811_PIDEP_B, PIDEP(USB_PID_SOF, 0));
 157        sl811_write(SL811_DEV_B, 0x00);
 158        sl811_write(SL811_SOFLOW, SL811_12M_LOW);
 159
 160        if (status & SL811_INTR_SPEED_FULL) {
 161                /* full speed device connect directly to root hub */
 162                PDEBUG (0, "Full speed Device attached\n");
 163
 164                sl811_write(SL811_CTRL1, SL811_CTRL1_RESET);
 165                mdelay(20);
 166                sl811_write(SL811_CTRL2, SL811_CTL2_HOST | SL811_12M_HI);
 167                sl811_write(SL811_CTRL1, SL811_CTRL1_SOF);
 168
 169                /* start the SOF or EOP */
 170                sl811_write(SL811_CTRL_B, SL811_USB_CTRL_ARM);
 171                rh_status.wPortStatus |= USB_PORT_STAT_CONNECTION;
 172                rh_status.wPortStatus &= ~USB_PORT_STAT_LOW_SPEED;
 173                mdelay(2);
 174                sl811_write(SL811_INTRSTS, 0xff);
 175        } else {
 176                /* slow speed device connect directly to root-hub */
 177                PDEBUG(0, "Low speed Device attached\n");
 178
 179                sl811_write(SL811_CTRL1, SL811_CTRL1_RESET);
 180                mdelay(20);
 181                sl811_write(SL811_CTRL2, SL811_CTL2_HOST | SL811_CTL2_DSWAP | SL811_12M_HI);
 182                sl811_write(SL811_CTRL1, SL811_CTRL1_SPEED_LOW | SL811_CTRL1_SOF);
 183
 184                /* start the SOF or EOP */
 185                sl811_write(SL811_CTRL_B, SL811_USB_CTRL_ARM);
 186                rh_status.wPortStatus |= USB_PORT_STAT_CONNECTION | USB_PORT_STAT_LOW_SPEED;
 187                mdelay(2);
 188                sl811_write(SL811_INTRSTS, 0xff);
 189        }
 190
 191        rh_status.wPortChange |= USB_PORT_STAT_C_CONNECTION;
 192        sl811_write(SL811_INTR, /*SL811_INTR_INSRMV*/SL811_INTR_DONE_A);
 193
 194        return 1;
 195}
 196
 197int usb_lowlevel_init(int index, enum usb_init_type init, void **controller)
 198{
 199        root_hub_devnum = 0;
 200        sl811_hc_reset();
 201        return 0;
 202}
 203
 204int usb_lowlevel_stop(int index)
 205{
 206        sl811_hc_reset();
 207        return 0;
 208}
 209
 210static int calc_needed_buswidth(int bytes, int need_preamble)
 211{
 212        return !need_preamble ? bytes * 8 + 256 : 8 * 8 * bytes + 2048;
 213}
 214
 215static int sl811_send_packet(struct usb_device *dev, unsigned long pipe, __u8 *buffer, int len)
 216{
 217        __u8 ctrl = SL811_USB_CTRL_ARM | SL811_USB_CTRL_ENABLE;
 218        __u16 status = 0;
 219        int err = 0, time_start = get_timer(0);
 220        int need_preamble = !(rh_status.wPortStatus & USB_PORT_STAT_LOW_SPEED) &&
 221                (dev->speed == USB_SPEED_LOW);
 222
 223        if (len > 239)
 224                return -1;
 225
 226        if (usb_pipeout(pipe))
 227                ctrl |= SL811_USB_CTRL_DIR_OUT;
 228        if (usb_gettoggle(dev, usb_pipeendpoint(pipe), usb_pipeout(pipe)))
 229                ctrl |= SL811_USB_CTRL_TOGGLE_1;
 230        if (need_preamble)
 231                ctrl |= SL811_USB_CTRL_PREAMBLE;
 232
 233        sl811_write(SL811_INTRSTS, 0xff);
 234
 235        while (err < 3) {
 236                sl811_write(SL811_ADDR_A, 0x10);
 237                sl811_write(SL811_LEN_A, len);
 238                if (usb_pipeout(pipe) && len)
 239                        sl811_write_buf(0x10, buffer, len);
 240
 241                if (!(rh_status.wPortStatus & USB_PORT_STAT_LOW_SPEED) &&
 242                    sl811_read(SL811_SOFCNTDIV)*64 < calc_needed_buswidth(len, need_preamble))
 243                        ctrl |= SL811_USB_CTRL_SOF;
 244                else
 245                        ctrl &= ~SL811_USB_CTRL_SOF;
 246
 247                sl811_write(SL811_CTRL_A, ctrl);
 248                while (!(sl811_read(SL811_INTRSTS) & SL811_INTR_DONE_A)) {
 249                        if (5*CONFIG_SYS_HZ < get_timer(time_start)) {
 250                                printf("USB transmit timed out\n");
 251                                return -USB_ST_CRC_ERR;
 252                        }
 253                }
 254
 255                sl811_write(SL811_INTRSTS, 0xff);
 256                status = sl811_read(SL811_STS_A);
 257
 258                if (status & SL811_USB_STS_ACK) {
 259                        int remainder = sl811_read(SL811_CNT_A);
 260                        if (remainder) {
 261                                PDEBUG(0, "usb transfer remainder = %d\n", remainder);
 262                                len -= remainder;
 263                        }
 264                        if (usb_pipein(pipe) && len)
 265                                sl811_read_buf(0x10, buffer, len);
 266                        return len;
 267                }
 268
 269                if ((status & SL811_USB_STS_NAK) == SL811_USB_STS_NAK)
 270                        continue;
 271
 272                PDEBUG(0, "usb transfer error %#x\n", (int)status);
 273                err++;
 274        }
 275
 276        err = 0;
 277
 278        if (status & SL811_USB_STS_ERROR)
 279                err |= USB_ST_BUF_ERR;
 280        if (status & SL811_USB_STS_TIMEOUT)
 281                err |= USB_ST_CRC_ERR;
 282        if (status & SL811_USB_STS_STALL)
 283                err |= USB_ST_STALLED;
 284
 285        return -err;
 286}
 287
 288int submit_bulk_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
 289                    int len)
 290{
 291        int dir_out = usb_pipeout(pipe);
 292        int ep = usb_pipeendpoint(pipe);
 293        int max = usb_maxpacket(dev, pipe);
 294        int done = 0;
 295
 296        PDEBUG(7, "dev = %ld pipe = %ld buf = %p size = %d dir_out = %d\n",
 297               usb_pipedevice(pipe), usb_pipeendpoint(pipe), buffer, len, dir_out);
 298
 299        dev->status = 0;
 300
 301        sl811_write(SL811_DEV_A, usb_pipedevice(pipe));
 302        sl811_write(SL811_PIDEP_A, PIDEP(!dir_out ? USB_PID_IN : USB_PID_OUT, ep));
 303        while (done < len) {
 304                int res = sl811_send_packet(dev, pipe, (__u8*)buffer+done,
 305                                            max > len - done ? len - done : max);
 306                if (res < 0) {
 307                        dev->status = -res;
 308                        return res;
 309                }
 310
 311                if (!dir_out && res < max) /* short packet */
 312                        break;
 313
 314                done += res;
 315                usb_dotoggle(dev, ep, dir_out);
 316        }
 317
 318        dev->act_len = done;
 319
 320        return 0;
 321}
 322
 323int submit_control_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
 324                       int len,struct devrequest *setup)
 325{
 326        int done = 0;
 327        int devnum = usb_pipedevice(pipe);
 328        int ep = usb_pipeendpoint(pipe);
 329
 330        dev->status = 0;
 331
 332        if (devnum == root_hub_devnum)
 333                return sl811_rh_submit_urb(dev, pipe, buffer, len, setup);
 334
 335        PDEBUG(7, "dev = %d pipe = %ld buf = %p size = %d rt = %#x req = %#x bus = %i\n",
 336               devnum, ep, buffer, len, (int)setup->requesttype,
 337               (int)setup->request, sl811_read(SL811_SOFCNTDIV)*64);
 338
 339        sl811_write(SL811_DEV_A, devnum);
 340        sl811_write(SL811_PIDEP_A, PIDEP(USB_PID_SETUP, ep));
 341        /* setup phase */
 342        usb_settoggle(dev, ep, 1, 0);
 343        if (sl811_send_packet(dev, usb_sndctrlpipe(dev, ep),
 344                              (__u8*)setup, sizeof(*setup)) == sizeof(*setup)) {
 345                int dir_in = usb_pipein(pipe);
 346                int max = usb_maxpacket(dev, pipe);
 347
 348                /* data phase */
 349                sl811_write(SL811_PIDEP_A,
 350                            PIDEP(dir_in ? USB_PID_IN : USB_PID_OUT, ep));
 351                usb_settoggle(dev, ep, usb_pipeout(pipe), 1);
 352                while (done < len) {
 353                        int res = sl811_send_packet(dev, pipe, (__u8*)buffer+done,
 354                                                    max > len - done ? len - done : max);
 355                        if (res < 0) {
 356                                PDEBUG(0, "status data failed!\n");
 357                                dev->status = -res;
 358                                return 0;
 359                        }
 360                        done += res;
 361                        usb_dotoggle(dev, ep, usb_pipeout(pipe));
 362                        if (dir_in && res < max) /* short packet */
 363                                break;
 364                }
 365
 366                /* status phase */
 367                sl811_write(SL811_PIDEP_A,
 368                            PIDEP(!dir_in ? USB_PID_IN : USB_PID_OUT, ep));
 369                usb_settoggle(dev, ep, !usb_pipeout(pipe), 1);
 370                if (sl811_send_packet(dev,
 371                                      !dir_in ? usb_rcvctrlpipe(dev, ep) :
 372                                      usb_sndctrlpipe(dev, ep),
 373                                      0, 0) < 0) {
 374                        PDEBUG(0, "status phase failed!\n");
 375                        dev->status = -1;
 376                }
 377        } else {
 378                PDEBUG(0, "setup phase failed!\n");
 379                dev->status = -1;
 380        }
 381
 382        dev->act_len = done;
 383
 384        return done;
 385}
 386
 387int submit_int_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
 388                   int len, int interval)
 389{
 390        PDEBUG(0, "dev = %p pipe = %#lx buf = %p size = %d int = %d\n", dev, pipe,
 391               buffer, len, interval);
 392        return -1;
 393}
 394
 395/*
 396 * SL811 Virtual Root Hub
 397 */
 398
 399/* Device descriptor */
 400static __u8 sl811_rh_dev_des[] =
 401{
 402        0x12,       /*  __u8  bLength; */
 403        0x01,       /*  __u8  bDescriptorType; Device */
 404        0x10,       /*  __u16 bcdUSB; v1.1 */
 405        0x01,
 406        0x09,       /*  __u8  bDeviceClass; HUB_CLASSCODE */
 407        0x00,       /*  __u8  bDeviceSubClass; */
 408        0x00,       /*  __u8  bDeviceProtocol; */
 409        0x08,       /*  __u8  bMaxPacketSize0; 8 Bytes */
 410        0x00,       /*  __u16 idVendor; */
 411        0x00,
 412        0x00,       /*  __u16 idProduct; */
 413        0x00,
 414        0x00,       /*  __u16 bcdDevice; */
 415        0x00,
 416        0x00,       /*  __u8  iManufacturer; */
 417        0x02,       /*  __u8  iProduct; */
 418        0x01,       /*  __u8  iSerialNumber; */
 419        0x01        /*  __u8  bNumConfigurations; */
 420};
 421
 422/* Configuration descriptor */
 423static __u8 sl811_rh_config_des[] =
 424{
 425        0x09,       /*  __u8  bLength; */
 426        0x02,       /*  __u8  bDescriptorType; Configuration */
 427        0x19,       /*  __u16 wTotalLength; */
 428        0x00,
 429        0x01,       /*  __u8  bNumInterfaces; */
 430        0x01,       /*  __u8  bConfigurationValue; */
 431        0x00,       /*  __u8  iConfiguration; */
 432        0x40,       /*  __u8  bmAttributes;
 433                    Bit 7: Bus-powered, 6: Self-powered, 5 Remote-wakwup,
 434                    4..0: resvd */
 435        0x00,       /*  __u8  MaxPower; */
 436
 437        /* interface */
 438        0x09,       /*  __u8  if_bLength; */
 439        0x04,       /*  __u8  if_bDescriptorType; Interface */
 440        0x00,       /*  __u8  if_bInterfaceNumber; */
 441        0x00,       /*  __u8  if_bAlternateSetting; */
 442        0x01,       /*  __u8  if_bNumEndpoints; */
 443        0x09,       /*  __u8  if_bInterfaceClass; HUB_CLASSCODE */
 444        0x00,       /*  __u8  if_bInterfaceSubClass; */
 445        0x00,       /*  __u8  if_bInterfaceProtocol; */
 446        0x00,       /*  __u8  if_iInterface; */
 447
 448        /* endpoint */
 449        0x07,       /*  __u8  ep_bLength; */
 450        0x05,       /*  __u8  ep_bDescriptorType; Endpoint */
 451        0x81,       /*  __u8  ep_bEndpointAddress; IN Endpoint 1 */
 452        0x03,       /*  __u8  ep_bmAttributes; Interrupt */
 453        0x08,       /*  __u16 ep_wMaxPacketSize; */
 454        0x00,
 455        0xff        /*  __u8  ep_bInterval; 255 ms */
 456};
 457
 458/* root hub class descriptor*/
 459static __u8 sl811_rh_hub_des[] =
 460{
 461        0x09,                   /*  __u8  bLength; */
 462        0x29,                   /*  __u8  bDescriptorType; Hub-descriptor */
 463        0x01,                   /*  __u8  bNbrPorts; */
 464        0x00,                   /* __u16  wHubCharacteristics; */
 465        0x00,
 466        0x50,                   /*  __u8  bPwrOn2pwrGood; 2ms */
 467        0x00,                   /*  __u8  bHubContrCurrent; 0 mA */
 468        0xfc,                   /*  __u8  DeviceRemovable; *** 7 Ports max *** */
 469        0xff                    /*  __u8  PortPwrCtrlMask; *** 7 ports max *** */
 470};
 471
 472/*
 473 * helper routine for returning string descriptors in UTF-16LE
 474 * input can actually be ISO-8859-1; ASCII is its 7-bit subset
 475 */
 476static int ascii2utf (char *s, u8 *utf, int utfmax)
 477{
 478        int retval;
 479
 480        for (retval = 0; *s && utfmax > 1; utfmax -= 2, retval += 2) {
 481                *utf++ = *s++;
 482                *utf++ = 0;
 483        }
 484        return retval;
 485}
 486
 487/*
 488 * root_hub_string is used by each host controller's root hub code,
 489 * so that they're identified consistently throughout the system.
 490 */
 491static int usb_root_hub_string (int id, int serial, char *type, __u8 *data, int len)
 492{
 493        char buf [30];
 494
 495        /* assert (len > (2 * (sizeof (buf) + 1)));
 496           assert (strlen (type) <= 8);*/
 497
 498        /* language ids */
 499        if (id == 0) {
 500                *data++ = 4; *data++ = 3;       /* 4 bytes data */
 501                *data++ = 0; *data++ = 0;       /* some language id */
 502                return 4;
 503
 504        /* serial number */
 505        } else if (id == 1) {
 506                sprintf (buf, "%#x", serial);
 507
 508        /* product description */
 509        } else if (id == 2) {
 510                sprintf (buf, "USB %s Root Hub", type);
 511
 512        /* id 3 == vendor description */
 513
 514        /* unsupported IDs --> "stall" */
 515        } else
 516            return 0;
 517
 518        ascii2utf (buf, data + 2, len - 2);
 519        data [0] = 2 + strlen(buf) * 2;
 520        data [1] = 3;
 521        return data [0];
 522}
 523
 524/* helper macro */
 525#define OK(x)   len = (x); break
 526
 527/*
 528 * This function handles all USB request to the the virtual root hub
 529 */
 530static int sl811_rh_submit_urb(struct usb_device *usb_dev, unsigned long pipe,
 531                               void *data, int buf_len, struct devrequest *cmd)
 532{
 533        __u8 data_buf[16];
 534        __u8 *bufp = data_buf;
 535        int len = 0;
 536        int status = 0;
 537        __u16 bmRType_bReq;
 538        __u16 wValue  = le16_to_cpu (cmd->value);
 539        __u16 wLength = le16_to_cpu (cmd->length);
 540#ifdef SL811_DEBUG
 541        __u16 wIndex  = le16_to_cpu (cmd->index);
 542#endif
 543
 544        if (usb_pipeint(pipe)) {
 545                PDEBUG(0, "interrupt transfer unimplemented!\n");
 546                return 0;
 547        }
 548
 549        bmRType_bReq  = cmd->requesttype | (cmd->request << 8);
 550
 551        PDEBUG(5, "submit rh urb, req = %d(%x) val = %#x index = %#x len=%d\n",
 552               bmRType_bReq, bmRType_bReq, wValue, wIndex, wLength);
 553
 554        /* Request Destination:
 555                   without flags: Device,
 556                   USB_RECIP_INTERFACE: interface,
 557                   USB_RECIP_ENDPOINT: endpoint,
 558                   USB_TYPE_CLASS means HUB here,
 559                   USB_RECIP_OTHER | USB_TYPE_CLASS  almost ever means HUB_PORT here
 560        */
 561        switch (bmRType_bReq) {
 562        case RH_GET_STATUS:
 563                *(__u16 *)bufp = cpu_to_le16(1);
 564                OK(2);
 565
 566        case RH_GET_STATUS | USB_RECIP_INTERFACE:
 567                *(__u16 *)bufp = cpu_to_le16(0);
 568                OK(2);
 569
 570        case RH_GET_STATUS | USB_RECIP_ENDPOINT:
 571                *(__u16 *)bufp = cpu_to_le16(0);
 572                OK(2);
 573
 574        case RH_GET_STATUS | USB_TYPE_CLASS:
 575                *(__u32 *)bufp = cpu_to_le32(0);
 576                OK(4);
 577
 578        case RH_GET_STATUS | USB_RECIP_OTHER | USB_TYPE_CLASS:
 579                *(__u32 *)bufp = cpu_to_le32(rh_status.wPortChange<<16 | rh_status.wPortStatus);
 580                OK(4);
 581
 582        case RH_CLEAR_FEATURE | USB_RECIP_ENDPOINT:
 583                switch (wValue) {
 584                case 1:
 585                        OK(0);
 586                }
 587                break;
 588
 589        case RH_CLEAR_FEATURE | USB_TYPE_CLASS:
 590                switch (wValue) {
 591                case C_HUB_LOCAL_POWER:
 592                        OK(0);
 593
 594                case C_HUB_OVER_CURRENT:
 595                        OK(0);
 596                }
 597                break;
 598
 599        case RH_CLEAR_FEATURE | USB_RECIP_OTHER | USB_TYPE_CLASS:
 600                switch (wValue) {
 601                case USB_PORT_FEAT_ENABLE:
 602                        rh_status.wPortStatus &= ~USB_PORT_STAT_ENABLE;
 603                        OK(0);
 604
 605                case USB_PORT_FEAT_SUSPEND:
 606                        rh_status.wPortStatus &= ~USB_PORT_STAT_SUSPEND;
 607                        OK(0);
 608
 609                case USB_PORT_FEAT_POWER:
 610                        rh_status.wPortStatus &= ~USB_PORT_STAT_POWER;
 611                        OK(0);
 612
 613                case USB_PORT_FEAT_C_CONNECTION:
 614                        rh_status.wPortChange &= ~USB_PORT_STAT_C_CONNECTION;
 615                        OK(0);
 616
 617                case USB_PORT_FEAT_C_ENABLE:
 618                        rh_status.wPortChange &= ~USB_PORT_STAT_C_ENABLE;
 619                        OK(0);
 620
 621                case USB_PORT_FEAT_C_SUSPEND:
 622                        rh_status.wPortChange &= ~USB_PORT_STAT_C_SUSPEND;
 623                        OK(0);
 624
 625                case USB_PORT_FEAT_C_OVER_CURRENT:
 626                        rh_status.wPortChange &= ~USB_PORT_STAT_C_OVERCURRENT;
 627                        OK(0);
 628
 629                case USB_PORT_FEAT_C_RESET:
 630                        rh_status.wPortChange &= ~USB_PORT_STAT_C_RESET;
 631                        OK(0);
 632                }
 633                break;
 634
 635        case RH_SET_FEATURE | USB_RECIP_OTHER | USB_TYPE_CLASS:
 636                switch (wValue) {
 637                case USB_PORT_FEAT_SUSPEND:
 638                        rh_status.wPortStatus |= USB_PORT_STAT_SUSPEND;
 639                        OK(0);
 640
 641                case USB_PORT_FEAT_RESET:
 642                        rh_status.wPortStatus |= USB_PORT_STAT_RESET;
 643                        rh_status.wPortChange = 0;
 644                        rh_status.wPortChange |= USB_PORT_STAT_C_RESET;
 645                        rh_status.wPortStatus &= ~USB_PORT_STAT_RESET;
 646                        rh_status.wPortStatus |= USB_PORT_STAT_ENABLE;
 647                        OK(0);
 648
 649                case USB_PORT_FEAT_POWER:
 650                        rh_status.wPortStatus |= USB_PORT_STAT_POWER;
 651                        OK(0);
 652
 653                case USB_PORT_FEAT_ENABLE:
 654                        rh_status.wPortStatus |= USB_PORT_STAT_ENABLE;
 655                        OK(0);
 656                }
 657                break;
 658
 659        case RH_SET_ADDRESS:
 660                root_hub_devnum = wValue;
 661                OK(0);
 662
 663        case RH_GET_DESCRIPTOR:
 664                switch ((wValue & 0xff00) >> 8) {
 665                case USB_DT_DEVICE:
 666                        len = sizeof(sl811_rh_dev_des);
 667                        bufp = sl811_rh_dev_des;
 668                        OK(len);
 669
 670                case USB_DT_CONFIG:
 671                        len = sizeof(sl811_rh_config_des);
 672                        bufp = sl811_rh_config_des;
 673                        OK(len);
 674
 675                case USB_DT_STRING:
 676                        len = usb_root_hub_string(wValue & 0xff, (int)(long)0,  "SL811HS", data, wLength);
 677                        if (len > 0) {
 678                                bufp = data;
 679                                OK(len);
 680                        }
 681
 682                default:
 683                        status = -32;
 684                }
 685                break;
 686
 687        case RH_GET_DESCRIPTOR | USB_TYPE_CLASS:
 688                len = sizeof(sl811_rh_hub_des);
 689                bufp = sl811_rh_hub_des;
 690                OK(len);
 691
 692        case RH_GET_CONFIGURATION:
 693                bufp[0] = 0x01;
 694                OK(1);
 695
 696        case RH_SET_CONFIGURATION:
 697                OK(0);
 698
 699        default:
 700                PDEBUG(1, "unsupported root hub command\n");
 701                status = -32;
 702        }
 703
 704        len = min(len, buf_len);
 705        if (data != bufp)
 706                memcpy(data, bufp, len);
 707
 708        PDEBUG(5, "len = %d, status = %d\n", len, status);
 709
 710        usb_dev->status = status;
 711        usb_dev->act_len = len;
 712
 713        return status == 0 ? len : status;
 714}
 715