drivers/usb/host/ehci-hcd.c

   1 /*-
   2  * Copyright (c) 2007-2008, Juniper Networks, Inc.
   3  * Copyright (c) 2008, Excito Elektronik i Skåne AB
   4  * Copyright (c) 2008, Michael Trimarchi <trimarchimichael@yahoo.it>
   5  *
   6  * All rights reserved.
   7  *
   8  * This program is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU General Public License as
  10  * published by the Free Software Foundation version 2 of
  11  * the License.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  21  * MA 02111-1307 USA
  22  */
  23 #include <common.h>
  24 #include <asm/byteorder.h>
  25 #include <usb.h>
  26 #include <asm/io.h>
  27 #include <malloc.h>
  28 #include <watchdog.h>
  29 #ifdef CONFIG_USB_KEYBOARD
  30 #include <stdio_dev.h>
  31 extern unsigned char new[];
  32 #endif
  33
  34 #include "ehci.h"
  35
  36 int rootdev;
  37 struct ehci_hccr *hccr; /* R/O registers, not need for volatile */
  38 volatile struct ehci_hcor *hcor;
  39
  40 static uint16_t portreset;
  41 static struct QH qh_list __attribute__((aligned(32)));
  42
  43 static struct descriptor {
  44         struct usb_hub_descriptor hub;
  45         struct usb_device_descriptor device;
  46         struct usb_linux_config_descriptor config;
  47         struct usb_linux_interface_descriptor interface;
  48         struct usb_endpoint_descriptor endpoint;
  49 }  __attribute__ ((packed)) descriptor = {
  50         {
  51                 0x8,            /* bDescLength */
  52                 0x29,           /* bDescriptorType: hub descriptor */
  53                 2,              /* bNrPorts -- runtime modified */
  54                 0,              /* wHubCharacteristics */
  55                 0xff,           /* bPwrOn2PwrGood */
  56                 0,              /* bHubCntrCurrent */
  57                 {},             /* Device removable */
  58                 {}              /* at most 7 ports! XXX */
  59         },
  60         {
  61                 0x12,           /* bLength */
  62                 1,              /* bDescriptorType: UDESC_DEVICE */
  63                 cpu_to_le16(0x0200), /* bcdUSB: v2.0 */
  64                 9,              /* bDeviceClass: UDCLASS_HUB */
  65                 0,              /* bDeviceSubClass: UDSUBCLASS_HUB */
  66                 1,              /* bDeviceProtocol: UDPROTO_HSHUBSTT */
  67                 64,             /* bMaxPacketSize: 64 bytes */
  68                 0x0000,         /* idVendor */
  69                 0x0000,         /* idProduct */
  70                 cpu_to_le16(0x0100), /* bcdDevice */
  71                 1,              /* iManufacturer */
  72                 2,              /* iProduct */
  73                 0,              /* iSerialNumber */
  74                 1               /* bNumConfigurations: 1 */
  75         },
  76         {
  77                 0x9,
  78                 2,              /* bDescriptorType: UDESC_CONFIG */
  79                 cpu_to_le16(0x19),
  80                 1,              /* bNumInterface */
  81                 1,              /* bConfigurationValue */
  82                 0,              /* iConfiguration */
  83                 0x40,           /* bmAttributes: UC_SELF_POWER */
  84                 0               /* bMaxPower */
  85         },
  86         {
  87                 0x9,            /* bLength */
  88                 4,              /* bDescriptorType: UDESC_INTERFACE */
  89                 0,              /* bInterfaceNumber */
  90                 0,              /* bAlternateSetting */
  91                 1,              /* bNumEndpoints */
  92                 9,              /* bInterfaceClass: UICLASS_HUB */
  93                 0,              /* bInterfaceSubClass: UISUBCLASS_HUB */
  94                 0,              /* bInterfaceProtocol: UIPROTO_HSHUBSTT */
  95                 0               /* iInterface */
  96         },
  97         {
  98                 0x7,            /* bLength */
  99                 5,              /* bDescriptorType: UDESC_ENDPOINT */
 100                 0x81,           /* bEndpointAddress:
 101                                  * UE_DIR_IN | EHCI_INTR_ENDPT
 102                                  */
 103                 3,              /* bmAttributes: UE_INTERRUPT */
 104                 8,              /* wMaxPacketSize */
 105                 255             /* bInterval */
 106         },
 107 };
 108
 109 #if defined(CONFIG_EHCI_IS_TDI)
 110 #define ehci_is_TDI()   (1)
 111 #else
 112 #define ehci_is_TDI()   (0)
 113 #endif
 114
 115 #if defined(CONFIG_EHCI_DCACHE)
 116 /*
 117  * Routines to handle (flush/invalidate) the dcache for the QH and qTD
 118  * structures and data buffers. This is needed on platforms using this
 119  * EHCI support with dcache enabled.
 120  */
 121 static void flush_invalidate(u32 addr, int size, int flush)
 122 {
 123         if (flush)
 124                 flush_dcache_range(addr, addr + size);
 125         else
 126                 invalidate_dcache_range(addr, addr + size);
 127 }
 128
 129 static void cache_qtd(struct qTD *qtd, int flush)
 130 {
 131         u32 *ptr = (u32 *)qtd->qt_buffer[0];
 132         int len = (qtd->qt_token & 0x7fff0000) >> 16;
 133
 134         flush_invalidate((u32)qtd, sizeof(struct qTD), flush);
 135         if (ptr && len)
 136                 flush_invalidate((u32)ptr, len, flush);
 137 }
 138
 139
 140 static inline struct QH *qh_addr(struct QH *qh)
 141 {
 142         return (struct QH *)((u32)qh & 0xffffffe0);
 143 }
 144
 145 static void cache_qh(struct QH *qh, int flush)
 146 {
 147         struct qTD *qtd;
 148         struct qTD *next;
 149         static struct qTD *first_qtd;
 150
 151         /*
 152          * Walk the QH list and flush/invalidate all entries
 153          */
 154         while (1) {
 155                 flush_invalidate((u32)qh_addr(qh), sizeof(struct QH), flush);
 156                 if ((u32)qh & QH_LINK_TYPE_QH)
 157                         break;
 158                 qh = qh_addr(qh);
 159                 qh = (struct QH *)qh->qh_link;
 160         }
 161         qh = qh_addr(qh);
 162
 163         /*
 164          * Save first qTD pointer, needed for invalidating pass on this QH
 165          */
 166         if (flush)
 167                 first_qtd = qtd = (struct qTD *)(*(u32 *)&qh->qh_overlay &
 168                                                  0xffffffe0);
 169         else
 170                 qtd = first_qtd;
 171
 172         /*
 173          * Walk the qTD list and flush/invalidate all entries
 174          */
 175         while (1) {
 176                 if (qtd == NULL)
 177                         break;
 178                 cache_qtd(qtd, flush);
 179                 next = (struct qTD *)((u32)qtd->qt_next & 0xffffffe0);
 180                 if (next == qtd)
 181                         break;
 182                 qtd = next;
 183         }
 184 }
 185
 186 static inline void ehci_flush_dcache(struct QH *qh)
 187 {
 188         cache_qh(qh, 1);
 189 }
 190
 191 static inline void ehci_invalidate_dcache(struct QH *qh)
 192 {
 193         cache_qh(qh, 0);
 194 }
 195 #else /* CONFIG_EHCI_DCACHE */
 196 /*
 197  *
 198  */
 199 static inline void ehci_flush_dcache(struct QH *qh)
 200 {
 201 }
 202
 203 static inline void ehci_invalidate_dcache(struct QH *qh)
 204 {
 205 }
 206 #endif /* CONFIG_EHCI_DCACHE */
 207
 208 static int handshake(uint32_t *ptr, uint32_t mask, uint32_t done, int usec)
 209 {
 210         uint32_t result;
 211         do {
 212                 result = ehci_readl(ptr);
 213                 udelay(5);
 214                 if (result == ~(uint32_t)0)
 215                         return -1;
 216                 result &= mask;
 217                 if (result == done)
 218                         return 0;
 219                 usec--;
 220         } while (usec > 0);
 221         return -1;
 222 }
 223
 224 static void ehci_free(void *p, size_t sz)
 225 {
 226
 227 }
 228
 229 static int ehci_reset(void)
 230 {
 231         uint32_t cmd;
 232         uint32_t tmp;
 233         uint32_t *reg_ptr;
 234         int ret = 0;
 235
 236         cmd = ehci_readl(&hcor->or_usbcmd);
 237         cmd = (cmd & ~CMD_RUN) | CMD_RESET;
 238         ehci_writel(&hcor->or_usbcmd, cmd);
 239         ret = handshake((uint32_t *)&hcor->or_usbcmd, CMD_RESET, 0, 250 * 1000);
 240         if (ret < 0) {
 241                 printf("EHCI fail to reset\n");
 242                 goto out;
 243         }
 244
 245         if (ehci_is_TDI()) {
 246                 reg_ptr = (uint32_t *)((u8 *)hcor + USBMODE);
 247                 tmp = ehci_readl(reg_ptr);
 248                 tmp |= USBMODE_CM_HC;
 249 #if defined(CONFIG_EHCI_MMIO_BIG_ENDIAN)
 250                 tmp |= USBMODE_BE;
 251 #endif
 252                 ehci_writel(reg_ptr, tmp);
 253         }
 254 out:
 255         return ret;
 256 }
 257
 258 static void *ehci_alloc(size_t sz, size_t align)
 259 {
 260         static struct QH qh __attribute__((aligned(32)));
 261         static struct qTD td[3] __attribute__((aligned (32)));
 262         static int ntds;
 263         void *p;
 264
 265         switch (sz) {
 266         case sizeof(struct QH):
 267                 p = &qh;
 268                 ntds = 0;
 269                 break;
 270         case sizeof(struct qTD):
 271                 if (ntds == 3) {
 272                         debug("out of TDs\n");
 273                         return NULL;
 274                 }
 275                 p = &td[ntds];
 276                 ntds++;
 277                 break;
 278         default:
 279                 debug("unknown allocation size\n");
 280                 return NULL;
 281         }
 282
 283         memset(p, 0, sz);
 284         return p;
 285 }
 286
 287 static int ehci_td_buffer(struct qTD *td, void *buf, size_t sz)
 288 {
 289         uint32_t addr, delta, next;
 290         int idx;
 291
 292         addr = (uint32_t) buf;
 293         idx = 0;
 294         while (idx < 5) {
 295                 td->qt_buffer[idx] = cpu_to_hc32(addr);
 296                 td->qt_buffer_hi[idx] = 0;
 297                 next = (addr + 4096) & ~4095;
 298                 delta = next - addr;
 299                 if (delta >= sz)
 300                         break;
 301                 sz -= delta;
 302                 addr = next;
 303                 idx++;
 304         }
 305
 306         if (idx == 5) {
 307                 debug("out of buffer pointers (%u bytes left)\n", sz);
 308                 return -1;
 309         }
 310
 311         return 0;
 312 }
 313
 314 static int
 315 ehci_submit_async(struct usb_device *dev, unsigned long pipe, void *buffer,
 316                    int length, struct devrequest *req)
 317 {
 318         struct QH *qh;
 319         struct qTD *td;
 320         volatile struct qTD *vtd;
 321         unsigned long ts;
 322         uint32_t *tdp;
 323         uint32_t endpt, token, usbsts;
 324         uint32_t c, toggle;
 325         uint32_t cmd;
 326         int timeout;
 327         int ret = 0;
 328
 329         debug("dev=%p, pipe=%lx, buffer=%p, length=%d, req=%p\n", dev, pipe,
 330               buffer, length, req);
 331         if (req != NULL)
 332                 debug("req=%u (%#x), type=%u (%#x), value=%u (%#x), index=%u\n",
 333                       req->request, req->request,
 334                       req->requesttype, req->requesttype,
 335                       le16_to_cpu(req->value), le16_to_cpu(req->value),
 336                       le16_to_cpu(req->index));
 337
 338         qh = ehci_alloc(sizeof(struct QH), 32);
 339         if (qh == NULL) {
 340                 debug("unable to allocate QH\n");
 341                 return -1;
 342         }
 343         qh->qh_link = cpu_to_hc32((uint32_t)&qh_list | QH_LINK_TYPE_QH);
 344         c = (usb_pipespeed(pipe) != USB_SPEED_HIGH &&
 345              usb_pipeendpoint(pipe) == 0) ? 1 : 0;
 346         endpt = (8 << 28) |
 347             (c << 27) |
 348             (usb_maxpacket(dev, pipe) << 16) |
 349             (0 << 15) |
 350             (1 << 14) |
 351             (usb_pipespeed(pipe) << 12) |
 352             (usb_pipeendpoint(pipe) << 8) |
 353             (0 << 7) | (usb_pipedevice(pipe) << 0);
 354         qh->qh_endpt1 = cpu_to_hc32(endpt);
 355         endpt = (1 << 30) |
 356             (dev->portnr << 23) |
 357             (dev->parent->devnum << 16) | (0 << 8) | (0 << 0);
 358         qh->qh_endpt2 = cpu_to_hc32(endpt);
 359         qh->qh_overlay.qt_next = cpu_to_hc32(QT_NEXT_TERMINATE);
 360
 361         td = NULL;
 362         tdp = &qh->qh_overlay.qt_next;
 363
 364         toggle =
 365             usb_gettoggle(dev, usb_pipeendpoint(pipe), usb_pipeout(pipe));
 366
 367         if (req != NULL) {
 368                 td = ehci_alloc(sizeof(struct qTD), 32);
 369                 if (td == NULL) {
 370                         debug("unable to allocate SETUP td\n");
 371                         goto fail;
 372                 }
 373                 td->qt_next = cpu_to_hc32(QT_NEXT_TERMINATE);
 374                 td->qt_altnext = cpu_to_hc32(QT_NEXT_TERMINATE);
 375                 token = (0 << 31) |
 376                     (sizeof(*req) << 16) |
 377                     (0 << 15) | (0 << 12) | (3 << 10) | (2 << 8) | (0x80 << 0);
 378                 td->qt_token = cpu_to_hc32(token);
 379                 if (ehci_td_buffer(td, req, sizeof(*req)) != 0) {
 380                         debug("unable construct SETUP td\n");
 381                         ehci_free(td, sizeof(*td));
 382                         goto fail;
 383                 }
 384                 *tdp = cpu_to_hc32((uint32_t) td);
 385                 tdp = &td->qt_next;
 386                 toggle = 1;
 387         }
 388
 389         if (length > 0 || req == NULL) {
 390                 td = ehci_alloc(sizeof(struct qTD), 32);
 391                 if (td == NULL) {
 392                         debug("unable to allocate DATA td\n");
 393                         goto fail;
 394                 }
 395                 td->qt_next = cpu_to_hc32(QT_NEXT_TERMINATE);
 396                 td->qt_altnext = cpu_to_hc32(QT_NEXT_TERMINATE);
 397                 token = (toggle << 31) |
 398                     (length << 16) |
 399                     ((req == NULL ? 1 : 0) << 15) |
 400                     (0 << 12) |
 401                     (3 << 10) |
 402                     ((usb_pipein(pipe) ? 1 : 0) << 8) | (0x80 << 0);
 403                 td->qt_token = cpu_to_hc32(token);
 404                 if (ehci_td_buffer(td, buffer, length) != 0) {
 405                         debug("unable construct DATA td\n");
 406                         ehci_free(td, sizeof(*td));
 407                         goto fail;
 408                 }
 409                 *tdp = cpu_to_hc32((uint32_t) td);
 410                 tdp = &td->qt_next;
 411         }
 412
 413         if (req != NULL) {
 414                 td = ehci_alloc(sizeof(struct qTD), 32);
 415                 if (td == NULL) {
 416                         debug("unable to allocate ACK td\n");
 417                         goto fail;
 418                 }
 419                 td->qt_next = cpu_to_hc32(QT_NEXT_TERMINATE);
 420                 td->qt_altnext = cpu_to_hc32(QT_NEXT_TERMINATE);
 421                 token = (toggle << 31) |
 422                     (0 << 16) |
 423                     (1 << 15) |
 424                     (0 << 12) |
 425                     (3 << 10) |
 426                     ((usb_pipein(pipe) ? 0 : 1) << 8) | (0x80 << 0);
 427                 td->qt_token = cpu_to_hc32(token);
 428                 *tdp = cpu_to_hc32((uint32_t) td);
 429                 tdp = &td->qt_next;
 430         }
 431
 432         qh_list.qh_link = cpu_to_hc32((uint32_t) qh | QH_LINK_TYPE_QH);
 433
 434         /* Flush dcache */
 435         ehci_flush_dcache(&qh_list);
 436
 437         usbsts = ehci_readl(&hcor->or_usbsts);
 438         ehci_writel(&hcor->or_usbsts, (usbsts & 0x3f));
 439
 440         /* Enable async. schedule. */
 441         cmd = ehci_readl(&hcor->or_usbcmd);
 442         cmd |= CMD_ASE;
 443         ehci_writel(&hcor->or_usbcmd, cmd);
 444
 445         ret = handshake((uint32_t *)&hcor->or_usbsts, STD_ASS, STD_ASS,
 446                         100 * 1000);
 447         if (ret < 0) {
 448                 printf("EHCI fail timeout STD_ASS set\n");
 449                 goto fail;
 450         }
 451
 452         /* Wait for TDs to be processed. */
 453         ts = get_timer(0);
 454         vtd = td;
 455         timeout = USB_TIMEOUT_MS(pipe);
 456         do {
 457                 /* Invalidate dcache */
 458                 ehci_invalidate_dcache(&qh_list);
 459                 token = hc32_to_cpu(vtd->qt_token);
 460                 if (!(token & 0x80))
 461                         break;
 462                 WATCHDOG_RESET();
 463         } while (get_timer(ts) < timeout);
 464
 465         /* Check that the TD processing happened */
 466         if (token & 0x80) {
 467                 printf("EHCI timed out on TD - token=%#x\n", token);
 468         }
 469
 470         /* Disable async schedule. */
 471         cmd = ehci_readl(&hcor->or_usbcmd);
 472         cmd &= ~CMD_ASE;
 473         ehci_writel(&hcor->or_usbcmd, cmd);
 474
 475         ret = handshake((uint32_t *)&hcor->or_usbsts, STD_ASS, 0,
 476                         100 * 1000);
 477         if (ret < 0) {
 478                 printf("EHCI fail timeout STD_ASS reset\n");
 479                 goto fail;
 480         }
 481
 482         qh_list.qh_link = cpu_to_hc32((uint32_t)&qh_list | QH_LINK_TYPE_QH);
 483
 484         token = hc32_to_cpu(qh->qh_overlay.qt_token);
 485         if (!(token & 0x80)) {
 486                 debug("TOKEN=%#x\n", token);
 487                 switch (token & 0xfc) {
 488                 case 0:
 489                         toggle = token >> 31;
 490                         usb_settoggle(dev, usb_pipeendpoint(pipe),
 491                                        usb_pipeout(pipe), toggle);
 492                         dev->status = 0;
 493                         break;
 494                 case 0x40:
 495                         dev->status = USB_ST_STALLED;
 496                         break;
 497                 case 0xa0:
 498                 case 0x20:
 499                         dev->status = USB_ST_BUF_ERR;
 500                         break;
 501                 case 0x50:
 502                 case 0x10:
 503                         dev->status = USB_ST_BABBLE_DET;
 504                         break;
 505                 default:
 506                         dev->status = USB_ST_CRC_ERR;
 507                         if ((token & 0x40) == 0x40)
 508                                 dev->status |= USB_ST_STALLED;
 509                         break;
 510                 }
 511                 dev->act_len = length - ((token >> 16) & 0x7fff);
 512         } else {
 513                 dev->act_len = 0;
 514                 debug("dev=%u, usbsts=%#x, p[1]=%#x, p[2]=%#x\n",
 515                       dev->devnum, ehci_readl(&hcor->or_usbsts),
 516                       ehci_readl(&hcor->or_portsc[0]),
 517                       ehci_readl(&hcor->or_portsc[1]));
 518         }
 519
 520         return (dev->status != USB_ST_NOT_PROC) ? 0 : -1;
 521
 522 fail:
 523         td = (void *)hc32_to_cpu(qh->qh_overlay.qt_next);
 524         while (td != (void *)QT_NEXT_TERMINATE) {
 525                 qh->qh_overlay.qt_next = td->qt_next;
 526                 ehci_free(td, sizeof(*td));
 527                 td = (void *)hc32_to_cpu(qh->qh_overlay.qt_next);
 528         }
 529         ehci_free(qh, sizeof(*qh));
 530         return -1;
 531 }
 532
 533 static inline int min3(int a, int b, int c)
 534 {
 535
 536         if (b < a)
 537                 a = b;
 538         if (c < a)
 539                 a = c;
 540         return a;
 541 }
 542
 543 int
 544 ehci_submit_root(struct usb_device *dev, unsigned long pipe, void *buffer,
 545                  int length, struct devrequest *req)
 546 {
 547         uint8_t tmpbuf[4];
 548         u16 typeReq;
 549         void *srcptr = NULL;
 550         int len, srclen;
 551         uint32_t reg;
 552         uint32_t *status_reg;
 553
 554         if (le16_to_cpu(req->index) > CONFIG_SYS_USB_EHCI_MAX_ROOT_PORTS) {
 555                 printf("The request port(%d) is not configured\n",
 556                         le16_to_cpu(req->index) - 1);
 557                 return -1;
 558         }
 559         status_reg = (uint32_t *)&hcor->or_portsc[
 560                                                 le16_to_cpu(req->index) - 1];
 561         srclen = 0;
 562
 563         debug("req=%u (%#x), type=%u (%#x), value=%u, index=%u\n",
 564               req->request, req->request,
 565               req->requesttype, req->requesttype,
 566               le16_to_cpu(req->value), le16_to_cpu(req->index));
 567
 568         typeReq = req->request | req->requesttype << 8;
 569
 570         switch (typeReq) {
 571         case DeviceRequest | USB_REQ_GET_DESCRIPTOR:
 572                 switch (le16_to_cpu(req->value) >> 8) {
 573                 case USB_DT_DEVICE:
 574                         debug("USB_DT_DEVICE request\n");
 575                         srcptr = &descriptor.device;
 576                         srclen = 0x12;
 577                         break;
 578                 case USB_DT_CONFIG:
 579                         debug("USB_DT_CONFIG config\n");
 580                         srcptr = &descriptor.config;
 581                         srclen = 0x19;
 582                         break;
 583                 case USB_DT_STRING:
 584                         debug("USB_DT_STRING config\n");
 585                         switch (le16_to_cpu(req->value) & 0xff) {
 586                         case 0: /* Language */
 587                                 srcptr = "\4\3\1\0";
 588                                 srclen = 4;
 589                                 break;
 590                         case 1: /* Vendor */
 591                                 srcptr = "\16\3u\0-\0b\0o\0o\0t\0";
 592                                 srclen = 14;
 593                                 break;
 594                         case 2: /* Product */
 595                                 srcptr = "\52\3E\0H\0C\0I\0 "
 596                                          "\0H\0o\0s\0t\0 "
 597                                          "\0C\0o\0n\0t\0r\0o\0l\0l\0e\0r\0";
 598                                 srclen = 42;
 599                                 break;
 600                         default:
 601                                 debug("unknown value DT_STRING %x\n",
 602                                         le16_to_cpu(req->value));
 603                                 goto unknown;
 604                         }
 605                         break;
 606                 default:
 607                         debug("unknown value %x\n", le16_to_cpu(req->value));
 608                         goto unknown;
 609                 }
 610                 break;
 611         case USB_REQ_GET_DESCRIPTOR | ((USB_DIR_IN | USB_RT_HUB) << 8):
 612                 switch (le16_to_cpu(req->value) >> 8) {
 613                 case USB_DT_HUB:
 614                         debug("USB_DT_HUB config\n");
 615                         srcptr = &descriptor.hub;
 616                         srclen = 0x8;
 617                         break;
 618                 default:
 619                         debug("unknown value %x\n", le16_to_cpu(req->value));
 620                         goto unknown;
 621                 }
 622                 break;
 623         case USB_REQ_SET_ADDRESS | (USB_RECIP_DEVICE << 8):
 624                 debug("USB_REQ_SET_ADDRESS\n");
 625                 rootdev = le16_to_cpu(req->value);
 626                 break;
 627         case DeviceOutRequest | USB_REQ_SET_CONFIGURATION:
 628                 debug("USB_REQ_SET_CONFIGURATION\n");
 629                 /* Nothing to do */
 630                 break;
 631         case USB_REQ_GET_STATUS | ((USB_DIR_IN | USB_RT_HUB) << 8):
 632                 tmpbuf[0] = 1;  /* USB_STATUS_SELFPOWERED */
 633                 tmpbuf[1] = 0;
 634                 srcptr = tmpbuf;
 635                 srclen = 2;
 636                 break;
 637         case USB_REQ_GET_STATUS | ((USB_RT_PORT | USB_DIR_IN) << 8):
 638                 memset(tmpbuf, 0, 4);
 639                 reg = ehci_readl(status_reg);
 640                 if (reg & EHCI_PS_CS)
 641                         tmpbuf[0] |= USB_PORT_STAT_CONNECTION;
 642                 if (reg & EHCI_PS_PE)
 643                         tmpbuf[0] |= USB_PORT_STAT_ENABLE;
 644                 if (reg & EHCI_PS_SUSP)
 645                         tmpbuf[0] |= USB_PORT_STAT_SUSPEND;
 646                 if (reg & EHCI_PS_OCA)
 647                         tmpbuf[0] |= USB_PORT_STAT_OVERCURRENT;
 648                 if (reg & EHCI_PS_PR)
 649                         tmpbuf[0] |= USB_PORT_STAT_RESET;
 650                 if (reg & EHCI_PS_PP)
 651                         tmpbuf[1] |= USB_PORT_STAT_POWER >> 8;
 652
 653                 if (ehci_is_TDI()) {
 654                         switch ((reg >> 26) & 3) {
 655                         case 0:
 656                                 break;
 657                         case 1:
 658                                 tmpbuf[1] |= USB_PORT_STAT_LOW_SPEED >> 8;
 659                                 break;
 660                         case 2:
 661                         default:
 662                                 tmpbuf[1] |= USB_PORT_STAT_HIGH_SPEED >> 8;
 663                                 break;
 664                         }
 665                 } else {
 666                         tmpbuf[1] |= USB_PORT_STAT_HIGH_SPEED >> 8;
 667                 }
 668
 669                 if (reg & EHCI_PS_CSC)
 670                         tmpbuf[2] |= USB_PORT_STAT_C_CONNECTION;
 671                 if (reg & EHCI_PS_PEC)
 672                         tmpbuf[2] |= USB_PORT_STAT_C_ENABLE;
 673                 if (reg & EHCI_PS_OCC)
 674                         tmpbuf[2] |= USB_PORT_STAT_C_OVERCURRENT;
 675                 if (portreset & (1 << le16_to_cpu(req->index)))
 676                         tmpbuf[2] |= USB_PORT_STAT_C_RESET;
 677
 678                 srcptr = tmpbuf;
 679                 srclen = 4;
 680                 break;
 681         case USB_REQ_SET_FEATURE | ((USB_DIR_OUT | USB_RT_PORT) << 8):
 682                 reg = ehci_readl(status_reg);
 683                 reg &= ~EHCI_PS_CLEAR;
 684                 switch (le16_to_cpu(req->value)) {
 685                 case USB_PORT_FEAT_ENABLE:
 686                         reg |= EHCI_PS_PE;
 687                         ehci_writel(status_reg, reg);
 688                         break;
 689                 case USB_PORT_FEAT_POWER:
 690                         if (HCS_PPC(ehci_readl(&hccr->cr_hcsparams))) {
 691                                 reg |= EHCI_PS_PP;
 692                                 ehci_writel(status_reg, reg);
 693                         }
 694                         break;
 695                 case USB_PORT_FEAT_RESET:
 696                         if ((reg & (EHCI_PS_PE | EHCI_PS_CS)) == EHCI_PS_CS &&
 697                             !ehci_is_TDI() &&
 698                             EHCI_PS_IS_LOWSPEED(reg)) {
 699                                 /* Low speed device, give up ownership. */
 700                                 debug("port %d low speed --> companion\n",
 701                                       req->index - 1);
 702                                 reg |= EHCI_PS_PO;
 703                                 ehci_writel(status_reg, reg);
 704                                 break;
 705                         } else {
 706                                 int ret;
 707
 708                                 reg |= EHCI_PS_PR;
 709                                 reg &= ~EHCI_PS_PE;
 710                                 ehci_writel(status_reg, reg);
 711                                 /*
 712                                  * caller must wait, then call GetPortStatus
 713                                  * usb 2.0 specification say 50 ms resets on
 714                                  * root
 715                                  */
 716                                 wait_ms(50);
 717                                 /* terminate the reset */
 718                                 ehci_writel(status_reg, reg & ~EHCI_PS_PR);
 719                                 /*
 720                                  * A host controller must terminate the reset
 721                                  * and stabilize the state of the port within
 722                                  * 2 milliseconds
 723                                  */
 724                                 ret = handshake(status_reg, EHCI_PS_PR, 0,
 725                                                 2 * 1000);
 726                                 if (!ret)
 727                                         portreset |=
 728                                                 1 << le16_to_cpu(req->index);
 729                                 else
 730                                         printf("port(%d) reset error\n",
 731                                         le16_to_cpu(req->index) - 1);
 732                         }
 733                         break;
 734                 default:
 735                         debug("unknown feature %x\n", le16_to_cpu(req->value));
 736                         goto unknown;
 737                 }
 738                 /* unblock posted writes */
 739                 (void) ehci_readl(&hcor->or_usbcmd);
 740                 break;
 741         case USB_REQ_CLEAR_FEATURE | ((USB_DIR_OUT | USB_RT_PORT) << 8):
 742                 reg = ehci_readl(status_reg);
 743                 switch (le16_to_cpu(req->value)) {
 744                 case USB_PORT_FEAT_ENABLE:
 745                         reg &= ~EHCI_PS_PE;
 746                         break;
 747                 case USB_PORT_FEAT_C_ENABLE:
 748                         reg = (reg & ~EHCI_PS_CLEAR) | EHCI_PS_PE;
 749                         break;
 750                 case USB_PORT_FEAT_POWER:
 751                         if (HCS_PPC(ehci_readl(&hccr->cr_hcsparams)))
 752                                 reg = reg & ~(EHCI_PS_CLEAR | EHCI_PS_PP);
 753                 case USB_PORT_FEAT_C_CONNECTION:
 754                         reg = (reg & ~EHCI_PS_CLEAR) | EHCI_PS_CSC;
 755                         break;
 756                 case USB_PORT_FEAT_OVER_CURRENT:
 757                         reg = (reg & ~EHCI_PS_CLEAR) | EHCI_PS_OCC;
 758                         break;
 759                 case USB_PORT_FEAT_C_RESET:
 760                         portreset &= ~(1 << le16_to_cpu(req->index));
 761                         break;
 762                 default:
 763                         debug("unknown feature %x\n", le16_to_cpu(req->value));
 764                         goto unknown;
 765                 }
 766                 ehci_writel(status_reg, reg);
 767                 /* unblock posted write */
 768                 (void) ehci_readl(&hcor->or_usbcmd);
 769                 break;
 770         default:
 771                 debug("Unknown request\n");
 772                 goto unknown;
 773         }
 774
 775         wait_ms(1);
 776         len = min3(srclen, le16_to_cpu(req->length), length);
 777         if (srcptr != NULL && len > 0)
 778                 memcpy(buffer, srcptr, len);
 779         else
 780                 debug("Len is 0\n");
 781
 782         dev->act_len = len;
 783         dev->status = 0;
 784         return 0;
 785
 786 unknown:
 787         debug("requesttype=%x, request=%x, value=%x, index=%x, length=%x\n",
 788               req->requesttype, req->request, le16_to_cpu(req->value),
 789               le16_to_cpu(req->index), le16_to_cpu(req->length));
 790
 791         dev->act_len = 0;
 792         dev->status = USB_ST_STALLED;
 793         return -1;
 794 }
 795
 796 int usb_lowlevel_stop(void)
 797 {
 798         return ehci_hcd_stop();
 799 }
 800
 801 int usb_lowlevel_init(void)
 802 {
 803         uint32_t reg;
 804         uint32_t cmd;
 805
 806         if (ehci_hcd_init() != 0)
 807                 return -1;
 808
 809         /* EHCI spec section 4.1 */
 810         if (ehci_reset() != 0)
 811                 return -1;
 812
 813 #if defined(CONFIG_EHCI_HCD_INIT_AFTER_RESET)
 814         if (ehci_hcd_init() != 0)
 815                 return -1;
 816 #endif
 817
 818         /* Set head of reclaim list */
 819         memset(&qh_list, 0, sizeof(qh_list));
 820         qh_list.qh_link = cpu_to_hc32((uint32_t)&qh_list | QH_LINK_TYPE_QH);
 821         qh_list.qh_endpt1 = cpu_to_hc32((1 << 15) | (USB_SPEED_HIGH << 12));
 822         qh_list.qh_curtd = cpu_to_hc32(QT_NEXT_TERMINATE);
 823         qh_list.qh_overlay.qt_next = cpu_to_hc32(QT_NEXT_TERMINATE);
 824         qh_list.qh_overlay.qt_altnext = cpu_to_hc32(QT_NEXT_TERMINATE);
 825         qh_list.qh_overlay.qt_token = cpu_to_hc32(0x40);
 826
 827         /* Set async. queue head pointer. */
 828         ehci_writel(&hcor->or_asynclistaddr, (uint32_t)&qh_list);
 829
 830         reg = ehci_readl(&hccr->cr_hcsparams);
 831         descriptor.hub.bNbrPorts = HCS_N_PORTS(reg);
 832         printf("Register %x NbrPorts %d\n", reg, descriptor.hub.bNbrPorts);
 833         /* Port Indicators */
 834         if (HCS_INDICATOR(reg))
 835                 descriptor.hub.wHubCharacteristics |= 0x80;
 836         /* Port Power Control */
 837         if (HCS_PPC(reg))
 838                 descriptor.hub.wHubCharacteristics |= 0x01;
 839
 840         /* Start the host controller. */
 841         cmd = ehci_readl(&hcor->or_usbcmd);
 842         /*
 843          * Philips, Intel, and maybe others need CMD_RUN before the
 844          * root hub will detect new devices (why?); NEC doesn't
 845          */
 846         cmd &= ~(CMD_LRESET|CMD_IAAD|CMD_PSE|CMD_ASE|CMD_RESET);
 847         cmd |= CMD_RUN;
 848         ehci_writel(&hcor->or_usbcmd, cmd);
 849
 850         /* take control over the ports */
 851         cmd = ehci_readl(&hcor->or_configflag);
 852         cmd |= FLAG_CF;
 853         ehci_writel(&hcor->or_configflag, cmd);
 854         /* unblock posted write */
 855         cmd = ehci_readl(&hcor->or_usbcmd);
 856         wait_ms(5);
 857         reg = HC_VERSION(ehci_readl(&hccr->cr_capbase));
 858         printf("USB EHCI %x.%02x\n", reg >> 8, reg & 0xff);
 859
 860         rootdev = 0;
 861
 862         return 0;
 863 }
 864
 865 int
 866 submit_bulk_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
 867                 int length)
 868 {
 869
 870         if (usb_pipetype(pipe) != PIPE_BULK) {
 871                 debug("non-bulk pipe (type=%lu)", usb_pipetype(pipe));
 872                 return -1;
 873         }
 874         return ehci_submit_async(dev, pipe, buffer, length, NULL);
 875 }
 876
 877 int
 878 submit_control_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
 879                    int length, struct devrequest *setup)
 880 {
 881
 882         if (usb_pipetype(pipe) != PIPE_CONTROL) {
 883                 debug("non-control pipe (type=%lu)", usb_pipetype(pipe));
 884                 return -1;
 885         }
 886
 887         if (usb_pipedevice(pipe) == rootdev) {
 888                 if (rootdev == 0)
 889                         dev->speed = USB_SPEED_HIGH;
 890                 return ehci_submit_root(dev, pipe, buffer, length, setup);
 891         }
 892         return ehci_submit_async(dev, pipe, buffer, length, setup);
 893 }
 894
 895 int
 896 submit_int_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
 897                int length, int interval)
 898 {
 899
 900         debug("dev=%p, pipe=%lu, buffer=%p, length=%d, interval=%d",
 901               dev, pipe, buffer, length, interval);
 902         return ehci_submit_async(dev, pipe, buffer, length, NULL);
 903 }
 904
 905 #ifdef CONFIG_SYS_USB_EVENT_POLL
 906 /*
 907  * This function polls for USB keyboard data.
 908  */
 909 void usb_event_poll()
 910 {
 911         struct stdio_dev *dev;
 912         struct usb_device *usb_kbd_dev;
 913         struct usb_interface *iface;
 914         struct usb_endpoint_descriptor *ep;
 915         int pipe;
 916         int maxp;
 917
 918         /* Get the pointer to USB Keyboard device pointer */
 919         dev = stdio_get_by_name("usbkbd");
 920         usb_kbd_dev = (struct usb_device *)dev->priv;
 921         iface = &usb_kbd_dev->config.if_desc[0];
 922         ep = &iface->ep_desc[0];
 923         pipe = usb_rcvintpipe(usb_kbd_dev, ep->bEndpointAddress);
 924
 925         /* Submit a interrupt transfer request */
 926         maxp = usb_maxpacket(usb_kbd_dev, pipe);
 927         usb_submit_int_msg(usb_kbd_dev, pipe, &new[0],
 928                         maxp > 8 ? 8 : maxp, ep->bInterval);
 929 }
 930 #endif /* CONFIG_SYS_USB_EVENT_POLL */