drivers/usb/usb_ehci_core.c

   1 /*-
   2  * Copyright (c) 2007-2008, Juniper Networks, Inc.
   3  * Copyright (c) 2008, Excito Elektronik i Skåne AB
   4  * All rights reserved.
   5  *
   6  * This program is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU General Public License as
   8  * published by the Free Software Foundation version 2 of
   9  * the License.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software
  18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  19  * MA 02111-1307 USA
  20  */
  21 #define DEBUG
  22 #include <common.h>
  23 #include <asm/byteorder.h>
  24 #include <usb.h>
  25 #include <asm/io.h>
  26 #include <malloc.h>
  27 #include "usb_ehci.h"
  28
  29 int rootdev;
  30 struct ehci_hccr *hccr;         /* R/O registers, not need for volatile */
  31 volatile struct ehci_hcor *hcor;
  32
  33 static uint16_t portreset;
  34 static struct QH qh_list __attribute__((aligned(32)));
  35
  36 static struct descriptor {
  37         struct usb_hub_descriptor hub;
  38         struct usb_device_descriptor device;
  39         struct usb_linux_config_descriptor config;
  40         struct usb_linux_interface_descriptor interface;
  41         struct usb_endpoint_descriptor endpoint;
  42 }  __attribute__ ((packed)) descriptor = {
  43         {
  44                 0x8,            /* bDescLength */
  45                 0x29,           /* bDescriptorType: hub descriptor */
  46                 2,              /* bNrPorts -- runtime modified */
  47                 0,              /* wHubCharacteristics */
  48                 0xff,           /* bPwrOn2PwrGood */
  49                 0,              /* bHubCntrCurrent */
  50                 {},             /* Device removable */
  51                 {}              /* at most 7 ports! XXX */
  52         },
  53         {
  54                 0x12,           /* bLength */
  55                 1,              /* bDescriptorType: UDESC_DEVICE */
  56                 0x0002,         /* bcdUSB: v2.0 */
  57                 9,              /* bDeviceClass: UDCLASS_HUB */
  58                 0,              /* bDeviceSubClass: UDSUBCLASS_HUB */
  59                 1,              /* bDeviceProtocol: UDPROTO_HSHUBSTT */
  60                 64,             /* bMaxPacketSize: 64 bytes */
  61                 0x0000,         /* idVendor */
  62                 0x0000,         /* idProduct */
  63                 0x0001,         /* bcdDevice */
  64                 1,              /* iManufacturer */
  65                 2,              /* iProduct */
  66                 0,              /* iSerialNumber */
  67                 1               /* bNumConfigurations: 1 */
  68         },
  69         {
  70                 0x9,
  71                 2,              /* bDescriptorType: UDESC_CONFIG */
  72                 cpu_to_le16(0x19),
  73                 1,              /* bNumInterface */
  74                 1,              /* bConfigurationValue */
  75                 0,              /* iConfiguration */
  76                 0x40,           /* bmAttributes: UC_SELF_POWER */
  77                 0               /* bMaxPower */
  78         },
  79         {
  80                 0x9,            /* bLength */
  81                 4,              /* bDescriptorType: UDESC_INTERFACE */
  82                 0,              /* bInterfaceNumber */
  83                 0,              /* bAlternateSetting */
  84                 1,              /* bNumEndpoints */
  85                 9,              /* bInterfaceClass: UICLASS_HUB */
  86                 0,              /* bInterfaceSubClass: UISUBCLASS_HUB */
  87                 0,              /* bInterfaceProtocol: UIPROTO_HSHUBSTT */
  88                 0               /* iInterface */
  89         },
  90         {
  91                 0x7,            /* bLength */
  92                 5,              /* bDescriptorType: UDESC_ENDPOINT */
  93                 0x81,           /* bEndpointAddress:
  94                                  * UE_DIR_IN | EHCI_INTR_ENDPT
  95                                  */
  96                 3,              /* bmAttributes: UE_INTERRUPT */
  97                 8, 0,           /* wMaxPacketSize */
  98                 255             /* bInterval */
  99         },
 100 };
 101
 102 static int handshake(uint32_t *ptr, uint32_t mask, uint32_t done, int msec)
 103 {
 104         uint32_t result;
 105         do {
 106                 result = ehci_readl(ptr);
 107                 debug("handshake read reg(%x)=%x\n", (uint32_t)ptr, result);
 108                 if (result == ~(uint32_t)0)
 109                         return -1;
 110                 result &= mask;
 111                 if (result == done)
 112                         return 0;
 113                 wait_ms(1);
 114                 msec--;
 115         } while (msec > 0);
 116         return -1;
 117 }
 118
 119 static void ehci_free(void *p, size_t sz)
 120 {
 121
 122 }
 123
 124 static int ehci_reset(void)
 125 {
 126         uint32_t cmd;
 127         uint32_t tmp;
 128         uint32_t *reg_ptr;
 129         int ret = 0;
 130
 131         cmd = ehci_readl(&hcor->or_usbcmd);
 132         cmd |= CMD_RESET;
 133         ehci_writel(&hcor->or_usbcmd, cmd);
 134         ret = handshake(&hcor->or_usbcmd, CMD_RESET, 0, 250);
 135         if (ret < 0) {
 136                 printf("EHCI fail to reset\n");
 137                 goto out;
 138         }
 139
 140 #if defined CONFIG_EHCI_IS_TDI
 141         reg_ptr = (uint32_t *)((u8 *)hcor + USBMODE);
 142         tmp = ehci_readl(reg_ptr);
 143         tmp |= USBMODE_CM_HC;
 144 #if defined CONFIG_EHCI_MMIO_BIG_ENDIAN
 145         tmp |= USBMODE_BE;
 146 #endif
 147         ehci_writel(reg_ptr, tmp);
 148 #endif
 149 out:
 150         return ret;
 151 }
 152
 153 static void *ehci_alloc(size_t sz, size_t align)
 154 {
 155         static struct QH qh __attribute__((aligned(32)));
 156         static struct qTD td[3] __attribute__((aligned (32)));
 157         static int ntds;
 158         void *p;
 159
 160         switch (sz) {
 161         case sizeof(struct QH):
 162                 p = &qh;
 163                 ntds = 0;
 164                 break;
 165         case sizeof(struct qTD):
 166                 if (ntds == 3) {
 167                         debug("out of TDs\n");
 168                         return NULL;
 169                 }
 170                 p = &td[ntds];
 171                 ntds++;
 172                 break;
 173         default:
 174                 debug("unknown allocation size\n");
 175                 return NULL;
 176         }
 177
 178         memset(p, sz, 0);
 179         return p;
 180 }
 181
 182 static int ehci_td_buffer(struct qTD *td, void *buf, size_t sz)
 183 {
 184         uint32_t addr, delta, next;
 185         int idx;
 186
 187         addr = (uint32_t) buf;
 188         idx = 0;
 189         while (idx < 5) {
 190                 td->qt_buffer[idx] = cpu_to_hc32(addr);
 191                 next = (addr + 4096) & ~4095;
 192                 delta = next - addr;
 193                 if (delta >= sz)
 194                         break;
 195                 sz -= delta;
 196                 addr = next;
 197                 idx++;
 198         }
 199
 200         if (idx == 5) {
 201                 debug("out of buffer pointers (%u bytes left)\n", sz);
 202                 return -1;
 203         }
 204
 205         return 0;
 206 }
 207
 208 static int
 209 ehci_submit_async(struct usb_device *dev, unsigned long pipe, void *buffer,
 210                    int length, struct devrequest *req)
 211 {
 212         struct QH *qh;
 213         struct qTD *td;
 214         volatile struct qTD *vtd;
 215         unsigned long ts;
 216         uint32_t *tdp;
 217         uint32_t endpt, token, usbsts;
 218         uint32_t c, toggle;
 219         uint32_t cmd;
 220         uint32_t sts;
 221
 222         debug("dev=%p, pipe=%lx, buffer=%p, length=%d, req=%p\n", dev, pipe,
 223               buffer, length, req);
 224         if (req != NULL)
 225                 debug("req=%u (%#x), type=%u (%#x), value=%u (%#x), index=%u\n",
 226                       req->request, req->request,
 227                       req->requesttype, req->requesttype,
 228                       le16_to_cpu(req->value), le16_to_cpu(req->value),
 229                       le16_to_cpu(req->index));
 230
 231         qh = ehci_alloc(sizeof(struct QH), 32);
 232         if (qh == NULL) {
 233                 debug("unable to allocate QH\n");
 234                 return -1;
 235         }
 236         qh->qh_link = cpu_to_hc32((uint32_t)&qh_list | QH_LINK_TYPE_QH);
 237         c = (usb_pipespeed(pipe) != USB_SPEED_HIGH &&
 238              usb_pipeendpoint(pipe) == 0) ? 1 : 0;
 239         endpt = (8 << 28) |
 240             (c << 27) |
 241             (usb_maxpacket(dev, pipe) << 16) |
 242             (0 << 15) |
 243             (1 << 14) |
 244             (usb_pipespeed(pipe) << 12) |
 245             (usb_pipeendpoint(pipe) << 8) |
 246             (0 << 7) | (usb_pipedevice(pipe) << 0);
 247         qh->qh_endpt1 = cpu_to_hc32(endpt);
 248         endpt = (1 << 30) |
 249             (dev->portnr << 23) |
 250             (dev->parent->devnum << 16) | (0 << 8) | (0 << 0);
 251         qh->qh_endpt2 = cpu_to_hc32(endpt);
 252         qh->qh_overlay.qt_next = cpu_to_hc32(QT_NEXT_TERMINATE);
 253         qh->qh_overlay.qt_altnext = cpu_to_hc32(QT_NEXT_TERMINATE);
 254
 255         td = NULL;
 256         tdp = &qh->qh_overlay.qt_next;
 257
 258         toggle =
 259             usb_gettoggle(dev, usb_pipeendpoint(pipe), usb_pipeout(pipe));
 260
 261         if (req != NULL) {
 262                 td = ehci_alloc(sizeof(struct qTD), 32);
 263                 if (td == NULL) {
 264                         debug("unable to allocate SETUP td\n");
 265                         goto fail;
 266                 }
 267                 td->qt_next = cpu_to_hc32(QT_NEXT_TERMINATE);
 268                 td->qt_altnext = cpu_to_hc32(QT_NEXT_TERMINATE);
 269                 token = (0 << 31) |
 270                     (sizeof(*req) << 16) |
 271                     (0 << 15) | (0 << 12) | (3 << 10) | (2 << 8) | (0x80 << 0);
 272                 td->qt_token = cpu_to_hc32(token);
 273                 if (ehci_td_buffer(td, req, sizeof(*req)) != 0) {
 274                         debug("unable construct SETUP td\n");
 275                         ehci_free(td, sizeof(*td));
 276                         goto fail;
 277                 }
 278                 *tdp = cpu_to_hc32((uint32_t) td);
 279                 tdp = &td->qt_next;
 280                 toggle = 1;
 281         }
 282
 283         if (length > 0 || req == NULL) {
 284                 td = ehci_alloc(sizeof(struct qTD), 32);
 285                 if (td == NULL) {
 286                         debug("unable to allocate DATA td\n");
 287                         goto fail;
 288                 }
 289                 td->qt_next = cpu_to_hc32(QT_NEXT_TERMINATE);
 290                 td->qt_altnext = cpu_to_hc32(QT_NEXT_TERMINATE);
 291                 token = (toggle << 31) |
 292                     (length << 16) |
 293                     ((req == NULL ? 1 : 0) << 15) |
 294                     (0 << 12) |
 295                     (3 << 10) |
 296                     ((usb_pipein(pipe) ? 1 : 0) << 8) | (0x80 << 0);
 297                 td->qt_token = cpu_to_hc32(token);
 298                 if (ehci_td_buffer(td, buffer, length) != 0) {
 299                         debug("unable construct DATA td\n");
 300                         ehci_free(td, sizeof(*td));
 301                         goto fail;
 302                 }
 303                 *tdp = cpu_to_hc32((uint32_t) td);
 304                 tdp = &td->qt_next;
 305         }
 306
 307         if (req != NULL) {
 308                 td = ehci_alloc(sizeof(struct qTD), 32);
 309                 if (td == NULL) {
 310                         debug("unable to allocate ACK td\n");
 311                         goto fail;
 312                 }
 313                 td->qt_next = cpu_to_hc32(QT_NEXT_TERMINATE);
 314                 td->qt_altnext = cpu_to_hc32(QT_NEXT_TERMINATE);
 315                 token = (toggle << 31) |
 316                     (0 << 16) |
 317                     (1 << 15) |
 318                     (0 << 12) |
 319                     (3 << 10) |
 320                     ((usb_pipein(pipe) ? 0 : 1) << 8) | (0x80 << 0);
 321                 td->qt_token = cpu_to_hc32(token);
 322                 *tdp = cpu_to_hc32((uint32_t) td);
 323                 tdp = &td->qt_next;
 324         }
 325
 326         qh_list.qh_link = cpu_to_hc32((uint32_t) qh | QH_LINK_TYPE_QH);
 327
 328         usbsts = ehci_readl(&hcor->or_usbsts);
 329         ehci_writel(&hcor->or_usbsts, (usbsts & 0x3f));
 330
 331         /* Enable async. schedule. */
 332         cmd = ehci_readl(&hcor->or_usbcmd);
 333         cmd |= CMD_ASE;
 334         ehci_writel(&hcor->or_usbcmd, cmd);
 335
 336         sts = ehci_readl(&hcor->or_usbsts);
 337         while ((sts & STD_ASS) == 0) {
 338                 sts = ehci_readl(&hcor->or_usbsts);
 339                 udelay(10);
 340         }
 341
 342         /* Wait for TDs to be processed. */
 343         ts = get_timer(0);
 344         vtd = td;
 345         do {
 346                 token = hc32_to_cpu(vtd->qt_token);
 347                 if (!(token & 0x80))
 348                         break;
 349         } while (get_timer(ts) < CONFIG_SYS_HZ);
 350
 351         /* Disable async schedule. */
 352         cmd = ehci_readl(&hcor->or_usbcmd);
 353         cmd &= ~CMD_ASE;
 354         ehci_writel(&hcor->or_usbcmd, cmd);
 355
 356         sts = ehci_readl(&hcor->or_usbsts);
 357         while ((sts & STD_ASS) != 0) {
 358                 sts = ehci_readl(&hcor->or_usbsts);
 359                 udelay(10);
 360         }
 361
 362         qh_list.qh_link = cpu_to_hc32((uint32_t)&qh_list | QH_LINK_TYPE_QH);
 363
 364         token = hc32_to_cpu(qh->qh_overlay.qt_token);
 365         if (!(token & 0x80)) {
 366                 debug("TOKEN=%#x\n", token);
 367                 switch (token & 0xfc) {
 368                 case 0:
 369                         toggle = token >> 31;
 370                         usb_settoggle(dev, usb_pipeendpoint(pipe),
 371                                        usb_pipeout(pipe), toggle);
 372                         dev->status = 0;
 373                         break;
 374                 case 0x40:
 375                         dev->status = USB_ST_STALLED;
 376                         break;
 377                 case 0xa0:
 378                 case 0x20:
 379                         dev->status = USB_ST_BUF_ERR;
 380                         break;
 381                 case 0x50:
 382                 case 0x10:
 383                         dev->status = USB_ST_BABBLE_DET;
 384                         break;
 385                 default:
 386                         dev->status = USB_ST_CRC_ERR;
 387                         break;
 388                 }
 389                 dev->act_len = length - ((token >> 16) & 0x7fff);
 390         } else {
 391                 dev->act_len = 0;
 392                 debug("dev=%u, usbsts=%#x, p[1]=%#x, p[2]=%#x\n",
 393                       dev->devnum, ehci_readl(&hcor->or_usbsts),
 394                       ehci_readl(&hcor->or_portsc[0]),
 395                       ehci_readl(&hcor->or_portsc[1]));
 396         }
 397
 398         return (dev->status != USB_ST_NOT_PROC) ? 0 : -1;
 399
 400 fail:
 401         td = (void *)hc32_to_cpu(qh->qh_overlay.qt_next);
 402         while (td != (void *)QT_NEXT_TERMINATE) {
 403                 qh->qh_overlay.qt_next = td->qt_next;
 404                 ehci_free(td, sizeof(*td));
 405                 td = (void *)hc32_to_cpu(qh->qh_overlay.qt_next);
 406         }
 407         ehci_free(qh, sizeof(*qh));
 408         return -1;
 409 }
 410
 411 static inline int min3(int a, int b, int c)
 412 {
 413
 414         if (b < a)
 415                 a = b;
 416         if (c < a)
 417                 a = c;
 418         return a;
 419 }
 420
 421 int
 422 ehci_submit_root(struct usb_device *dev, unsigned long pipe, void *buffer,
 423                  int length, struct devrequest *req)
 424 {
 425         uint8_t tmpbuf[4];
 426         u16 typeReq;
 427         void *srcptr = NULL;
 428         int len, srclen;
 429         uint32_t reg;
 430
 431         srclen = 0;
 432
 433         debug("req=%u (%#x), type=%u (%#x), value=%u, index=%u\n",
 434               req->request, req->request,
 435               req->requesttype, req->requesttype,
 436               le16_to_cpu(req->value), le16_to_cpu(req->index));
 437
 438         typeReq = req->request << 8 | req->requesttype;
 439
 440         switch (le16_to_cpu(typeReq)) {
 441         case DeviceRequest | USB_REQ_GET_DESCRIPTOR:
 442                 switch (le16_to_cpu(req->value) >> 8) {
 443                 case USB_DT_DEVICE:
 444                         debug("USB_DT_DEVICE request\n");
 445                         srcptr = &descriptor.device;
 446                         srclen = 0x12;
 447                         break;
 448                 case USB_DT_CONFIG:
 449                         debug("USB_DT_CONFIG config\n");
 450                         srcptr = &descriptor.config;
 451                         srclen = 0x19;
 452                         break;
 453                 case USB_DT_STRING:
 454                         debug("USB_DT_STRING config\n");
 455                         switch (le16_to_cpu(req->value) & 0xff) {
 456                         case 0: /* Language */
 457                                 srcptr = "\4\3\1\0";
 458                                 srclen = 4;
 459                                 break;
 460                         case 1: /* Vendor */
 461                                 srcptr = "\16\3u\0-\0b\0o\0o\0t\0";
 462                                 srclen = 14;
 463                                 break;
 464                         case 2: /* Product */
 465                                 srcptr = "\52\3E\0H\0C\0I\0 "
 466                                          "\0H\0o\0s\0t\0 "
 467                                          "\0C\0o\0n\0t\0r\0o\0l\0l\0e\0r\0";
 468                                 srclen = 42;
 469                                 break;
 470                         default:
 471                                 debug("unknown value DT_STRING %x\n",
 472                                         le16_to_cpu(req->value));
 473                                 goto unknown;
 474                         }
 475                         break;
 476                 default:
 477                         debug("unknown value %x\n", le16_to_cpu(req->value));
 478                         goto unknown;
 479                 }
 480                 break;
 481         case USB_REQ_GET_DESCRIPTOR | ((USB_DIR_IN | USB_RT_HUB) << 8):
 482                 switch (le16_to_cpu(req->value) >> 8) {
 483                 case USB_DT_HUB:
 484                         debug("USB_DT_HUB config\n");
 485                         srcptr = &descriptor.hub;
 486                         srclen = 0x8;
 487                         break;
 488                 default:
 489                         debug("unknown value %x\n", le16_to_cpu(req->value));
 490                         goto unknown;
 491                 }
 492                 break;
 493         case USB_REQ_SET_ADDRESS | (USB_RECIP_DEVICE << 8):
 494                 debug("USB_REQ_SET_ADDRESS\n");
 495                 rootdev = le16_to_cpu(req->value);
 496                 break;
 497         case DeviceOutRequest | USB_REQ_SET_CONFIGURATION:
 498                 debug("USB_REQ_SET_CONFIGURATION\n");
 499                 /* Nothing to do */
 500                 break;
 501         case USB_REQ_GET_STATUS | ((USB_DIR_IN | USB_RT_HUB) << 8):
 502                 tmpbuf[0] = 1;  /* USB_STATUS_SELFPOWERED */
 503                 tmpbuf[1] = 0;
 504                 srcptr = tmpbuf;
 505                 srclen = 2;
 506                 break;
 507         case USB_REQ_GET_STATUS | ((USB_RT_PORT | USB_DIR_IN) << 8):
 508                 memset(tmpbuf, 0, 4);
 509                 reg = ehci_readl(&hcor->or_portsc[le16_to_cpu(req->index)
 510                                    - 1]);
 511                 if (reg & EHCI_PS_CS)
 512                         tmpbuf[0] |= USB_PORT_STAT_CONNECTION;
 513                 if (reg & EHCI_PS_PE)
 514                         tmpbuf[0] |= USB_PORT_STAT_ENABLE;
 515                 if (reg & EHCI_PS_SUSP)
 516                         tmpbuf[0] |= USB_PORT_STAT_SUSPEND;
 517                 if (reg & EHCI_PS_OCA)
 518                         tmpbuf[0] |= USB_PORT_STAT_OVERCURRENT;
 519                 if (reg & EHCI_PS_PR)
 520                         tmpbuf[0] |= USB_PORT_STAT_RESET;
 521                 if (reg & EHCI_PS_PP)
 522                         tmpbuf[1] |= USB_PORT_STAT_POWER >> 8;
 523                 tmpbuf[1] |= USB_PORT_STAT_HIGH_SPEED >> 8;
 524
 525                 if (reg & EHCI_PS_CSC)
 526                         tmpbuf[2] |= USB_PORT_STAT_C_CONNECTION;
 527                 if (reg & EHCI_PS_PEC)
 528                         tmpbuf[2] |= USB_PORT_STAT_C_ENABLE;
 529                 if (reg & EHCI_PS_OCC)
 530                         tmpbuf[2] |= USB_PORT_STAT_C_OVERCURRENT;
 531                 if (portreset & (1 << le16_to_cpu(req->index)))
 532                         tmpbuf[2] |= USB_PORT_STAT_C_RESET;
 533                 srcptr = tmpbuf;
 534                 srclen = 4;
 535                 break;
 536         case USB_REQ_SET_FEATURE | ((USB_DIR_OUT | USB_RT_PORT) << 8):
 537                 reg = ehci_readl(&hcor->or_portsc[le16_to_cpu(req->index) - 1]);
 538                 reg &= ~EHCI_PS_CLEAR;
 539                 switch (le16_to_cpu(req->value)) {
 540                 case USB_PORT_FEAT_ENABLE:
 541                         reg |= EHCI_PS_PE;
 542                         break;
 543                 case USB_PORT_FEAT_POWER:
 544                         reg |= EHCI_PS_PP;
 545                         break;
 546                 case USB_PORT_FEAT_RESET:
 547                         debug("USB FEAT RESET\n");
 548                         if (EHCI_PS_IS_LOWSPEED(reg)) {
 549                                 /* Low speed device, give up ownership. */
 550                                 reg |= EHCI_PS_PO;
 551                                 break;
 552                         }
 553                         /* Start reset sequence. */
 554                         reg &= ~EHCI_PS_PE;
 555                         reg |= EHCI_PS_PR;
 556                         ehci_writel(&hcor->or_portsc[
 557                                 le16_to_cpu(req->index) - 1], reg);
 558                         /* Wait for reset to complete. */
 559                         wait_ms(500);
 560                         /* Terminate reset sequence. */
 561                         reg &= ~EHCI_PS_PR;
 562                         /* TODO: is it only fsl chip that requires this
 563                          * manual setting of port enable?
 564                          */
 565                         reg |= EHCI_PS_PE;
 566                         ehci_writel(&hcor->or_portsc[
 567                                 le16_to_cpu(req->index) - 1], reg);
 568                         /* Wait for HC to complete reset. */
 569                         wait_ms(10);
 570                         reg =
 571                             ehci_readl(&hcor->or_portsc[le16_to_cpu(req->index)
 572                                                         - 1]);
 573                         reg &= ~EHCI_PS_CLEAR;
 574                         if ((reg & EHCI_PS_PE) == 0) {
 575                                 /* Not a high speed device, give up
 576                                  * ownership. */
 577                                 reg |= EHCI_PS_PO;
 578                                 break;
 579                         }
 580                         portreset |= 1 << le16_to_cpu(req->index);
 581                         break;
 582                 default:
 583                         debug("unknown feature %x\n", le16_to_cpu(req->value));
 584                         goto unknown;
 585                 }
 586                 ehci_writel(&hcor->or_portsc[le16_to_cpu(req->index) - 1], reg);
 587                 break;
 588         case USB_REQ_CLEAR_FEATURE | ((USB_DIR_OUT | USB_RT_PORT) << 8):
 589                 reg = ehci_readl(&hcor->or_portsc[le16_to_cpu(req->index) - 1]);
 590                 reg &= ~EHCI_PS_CLEAR;
 591                 switch (le16_to_cpu(req->value)) {
 592                 case USB_PORT_FEAT_ENABLE:
 593                         reg &= ~EHCI_PS_PE;
 594                         break;
 595                 case USB_PORT_FEAT_C_CONNECTION:
 596                         reg |= EHCI_PS_CSC;
 597                         break;
 598                 case USB_PORT_FEAT_OVER_CURRENT:
 599                         reg |= EHCI_PS_OCC;
 600                         break;
 601                 case USB_PORT_FEAT_C_RESET:
 602                         portreset &= ~(1 << le16_to_cpu(req->index));
 603                         break;
 604                 default:
 605                         debug("unknown feature %x\n", le16_to_cpu(req->value));
 606                         goto unknown;
 607                 }
 608                 ehci_writel(&hcor->or_portsc[le16_to_cpu(req->index) - 1], reg);
 609                 break;
 610         default:
 611                 debug("Unknown request\n");
 612                 goto unknown;
 613         }
 614
 615         wait_ms(1);
 616         len = min3(srclen, le16_to_cpu(req->length), length);
 617         if (srcptr != NULL && len > 0)
 618                 memcpy(buffer, srcptr, len);
 619         else
 620                 debug("Len is 0\n");
 621
 622         dev->act_len = len;
 623         dev->status = 0;
 624         return 0;
 625
 626 unknown:
 627         debug("requesttype=%x, request=%x, value=%x, index=%x, length=%x\n",
 628               req->requesttype, req->request, le16_to_cpu(req->value),
 629               le16_to_cpu(req->index), le16_to_cpu(req->length));
 630
 631         dev->act_len = 0;
 632         dev->status = USB_ST_STALLED;
 633         return -1;
 634 }
 635
 636 int usb_lowlevel_stop(void)
 637 {
 638         return ehci_hcd_stop();
 639 }
 640
 641 int usb_lowlevel_init(void)
 642 {
 643         uint32_t reg;
 644         uint32_t cmd;
 645
 646         if (ehci_hcd_init() != 0)
 647                 return -1;
 648
 649         /* EHCI spec section 4.1 */
 650         if (ehci_reset() != 0)
 651                 return -1;
 652
 653         /* Set head of reclaim list */
 654         memset(&qh_list, 0, sizeof(qh_list));
 655         qh_list.qh_link = cpu_to_hc32((uint32_t)&qh_list | QH_LINK_TYPE_QH);
 656         qh_list.qh_endpt1 = cpu_to_hc32((1 << 15) | (USB_SPEED_HIGH << 12));
 657         qh_list.qh_curtd = cpu_to_hc32(QT_NEXT_TERMINATE);
 658         qh_list.qh_overlay.qt_next = cpu_to_hc32(QT_NEXT_TERMINATE);
 659         qh_list.qh_overlay.qt_altnext = cpu_to_hc32(QT_NEXT_TERMINATE);
 660         qh_list.qh_overlay.qt_token = cpu_to_hc32(0x40);
 661
 662         /* Set async. queue head pointer. */
 663         ehci_writel(&hcor->or_asynclistaddr, (uint32_t)&qh_list);
 664
 665         reg = ehci_readl(&hccr->cr_hcsparams);
 666         descriptor.hub.bNbrPorts = HCS_N_PORTS(reg);
 667         printf("Register %x NbrPorts %d\n", reg, descriptor.hub.bNbrPorts);
 668         if (reg & 0x10000)      /* Port Indicators */
 669                 descriptor.hub.wHubCharacteristics |= 0x80;
 670         if (reg & 0x10)         /* Port Power Control */
 671                 descriptor.hub.wHubCharacteristics |= 0x01;
 672
 673         /* Start the host controller. */
 674         cmd = ehci_readl(&hcor->or_usbcmd);
 675         /* Philips, Intel, and maybe others need CMD_RUN before the
 676          * root hub will detect new devices (why?); NEC doesn't */
 677         cmd &= ~(CMD_LRESET|CMD_IAAD|CMD_PSE|CMD_ASE|CMD_RESET);
 678         cmd |= CMD_RUN;
 679         ehci_writel(&hcor->or_usbcmd, cmd);
 680
 681         /* take control over the ports */
 682         cmd = ehci_readl(&hcor->or_configflag);
 683         cmd |= FLAG_CF;
 684         ehci_writel(&hcor->or_configflag, cmd);
 685         /* unblock posted writes */
 686         cmd = ehci_readl(&hcor->or_usbcmd);
 687         wait_ms(5);
 688
 689         rootdev = 0;
 690
 691         return 0;
 692 }
 693
 694 int
 695 submit_bulk_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
 696                 int length)
 697 {
 698
 699         if (usb_pipetype(pipe) != PIPE_BULK) {
 700                 debug("non-bulk pipe (type=%lu)", usb_pipetype(pipe));
 701                 return -1;
 702         }
 703         return ehci_submit_async(dev, pipe, buffer, length, NULL);
 704 }
 705
 706 int
 707 submit_control_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
 708                    int length, struct devrequest *setup)
 709 {
 710
 711         if (usb_pipetype(pipe) != PIPE_CONTROL) {
 712                 debug("non-control pipe (type=%lu)", usb_pipetype(pipe));
 713                 return -1;
 714         }
 715
 716         if (usb_pipedevice(pipe) == rootdev) {
 717                 if (rootdev == 0)
 718                         dev->speed = USB_SPEED_HIGH;
 719                 return ehci_submit_root(dev, pipe, buffer, length, setup);
 720         }
 721         return ehci_submit_async(dev, pipe, buffer, length, setup);
 722 }
 723
 724 int
 725 submit_int_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
 726                int length, int interval)
 727 {
 728
 729         debug("dev=%p, pipe=%lu, buffer=%p, length=%d, interval=%d",
 730               dev, pipe, buffer, length, interval);
 731         return -1;
 732 }