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 void ehci_free (void *p, size_t sz)
 103 {
 104 }
 105
 106 static void *ehci_alloc(size_t sz, size_t align)
 107 {
 108         static struct QH qh __attribute__((aligned(32)));
 109         static struct qTD td[3] __attribute__((aligned (32)));
 110         static int ntds;
 111         void *p;
 112
 113         switch (sz) {
 114         case sizeof(struct QH):
 115                 p = &qh;
 116                 ntds = 0;
 117                 break;
 118         case sizeof(struct qTD):
 119                 if (ntds == 3) {
 120                         debug("out of TDs\n");
 121                         return NULL;
 122                 }
 123                 p = &td[ntds];
 124                 ntds++;
 125                 break;
 126         default:
 127                 debug("unknown allocation size\n");
 128                 return NULL;
 129         }
 130
 131         memset(p, sz, 0);
 132         return p;
 133 }
 134
 135 static int ehci_td_buffer(struct qTD *td, void *buf, size_t sz)
 136 {
 137         uint32_t addr, delta, next;
 138         int idx;
 139
 140         addr = (uint32_t) buf;
 141         idx = 0;
 142         while (idx < 5) {
 143                 td->qt_buffer[idx] = cpu_to_hc32(addr);
 144                 next = (addr + 4096) & ~4095;
 145                 delta = next - addr;
 146                 if (delta >= sz)
 147                         break;
 148                 sz -= delta;
 149                 addr = next;
 150                 idx++;
 151         }
 152
 153         if (idx == 5) {
 154                 debug("out of buffer pointers (%u bytes left)\n", sz);
 155                 return -1;
 156         }
 157
 158         return 0;
 159 }
 160
 161 static int
 162 ehci_submit_async(struct usb_device *dev, unsigned long pipe, void *buffer,
 163                    int length, struct devrequest *req)
 164 {
 165         struct QH *qh;
 166         struct qTD *td;
 167         volatile struct qTD *vtd;
 168         unsigned long ts;
 169         uint32_t *tdp;
 170         uint32_t endpt, token, usbsts;
 171         uint32_t c, toggle;
 172         uint32_t cmd;
 173
 174         debug("dev=%p, pipe=%lx, buffer=%p, length=%d, req=%p\n", dev, pipe,
 175               buffer, length, req);
 176         if (req != NULL)
 177                 debug("req=%u (%#x), type=%u (%#x), value=%u (%#x), index=%u\n",
 178                       req->request, req->request,
 179                       req->requesttype, req->requesttype,
 180                       le16_to_cpu(req->value), le16_to_cpu(req->value),
 181                       le16_to_cpu(req->index));
 182
 183         qh = ehci_alloc(sizeof(struct QH), 32);
 184         if (qh == NULL) {
 185                 debug("unable to allocate QH\n");
 186                 return -1;
 187         }
 188         qh->qh_link = cpu_to_hc32((uint32_t)&qh_list | QH_LINK_TYPE_QH);
 189         c = (usb_pipespeed(pipe) != USB_SPEED_HIGH &&
 190              usb_pipeendpoint(pipe) == 0) ? 1 : 0;
 191         endpt = (8 << 28) |
 192             (c << 27) |
 193             (usb_maxpacket(dev, pipe) << 16) |
 194             (0 << 15) |
 195             (1 << 14) |
 196             (usb_pipespeed(pipe) << 12) |
 197             (usb_pipeendpoint(pipe) << 8) |
 198             (0 << 7) | (usb_pipedevice(pipe) << 0);
 199         qh->qh_endpt1 = cpu_to_hc32(endpt);
 200         endpt = (1 << 30) |
 201             (dev->portnr << 23) |
 202             (dev->parent->devnum << 16) | (0 << 8) | (0 << 0);
 203         qh->qh_endpt2 = cpu_to_hc32(endpt);
 204         qh->qh_overlay.qt_next = cpu_to_hc32(QT_NEXT_TERMINATE);
 205         qh->qh_overlay.qt_altnext = cpu_to_hc32(QT_NEXT_TERMINATE);
 206
 207         td = NULL;
 208         tdp = &qh->qh_overlay.qt_next;
 209
 210         toggle =
 211             usb_gettoggle(dev, usb_pipeendpoint(pipe), usb_pipeout(pipe));
 212
 213         if (req != NULL) {
 214                 td = ehci_alloc(sizeof(struct qTD), 32);
 215                 if (td == NULL) {
 216                         debug("unable to allocate SETUP td\n");
 217                         goto fail;
 218                 }
 219                 td->qt_next = cpu_to_hc32(QT_NEXT_TERMINATE);
 220                 td->qt_altnext = cpu_to_hc32(QT_NEXT_TERMINATE);
 221                 token = (0 << 31) |
 222                     (sizeof(*req) << 16) |
 223                     (0 << 15) | (0 << 12) | (3 << 10) | (2 << 8) | (0x80 << 0);
 224                 td->qt_token = cpu_to_hc32(token);
 225                 if (ehci_td_buffer(td, req, sizeof(*req)) != 0) {
 226                         debug("unable construct SETUP td\n");
 227                         ehci_free(td, sizeof(*td));
 228                         goto fail;
 229                 }
 230                 *tdp = cpu_to_hc32((uint32_t) td);
 231                 tdp = &td->qt_next;
 232                 toggle = 1;
 233         }
 234
 235         if (length > 0 || req == NULL) {
 236                 td = ehci_alloc(sizeof(struct qTD), 32);
 237                 if (td == NULL) {
 238                         debug("unable to allocate DATA td\n");
 239                         goto fail;
 240                 }
 241                 td->qt_next = cpu_to_hc32(QT_NEXT_TERMINATE);
 242                 td->qt_altnext = cpu_to_hc32(QT_NEXT_TERMINATE);
 243                 token = (toggle << 31) |
 244                     (length << 16) |
 245                     ((req == NULL ? 1 : 0) << 15) |
 246                     (0 << 12) |
 247                     (3 << 10) |
 248                     ((usb_pipein(pipe) ? 1 : 0) << 8) | (0x80 << 0);
 249                 td->qt_token = cpu_to_hc32(token);
 250                 if (ehci_td_buffer(td, buffer, length) != 0) {
 251                         debug("unable construct DATA td\n");
 252                         ehci_free(td, sizeof(*td));
 253                         goto fail;
 254                 }
 255                 *tdp = cpu_to_hc32((uint32_t) td);
 256                 tdp = &td->qt_next;
 257         }
 258
 259         if (req != NULL) {
 260                 td = ehci_alloc(sizeof(struct qTD), 32);
 261                 if (td == NULL) {
 262                         debug("unable to allocate ACK td\n");
 263                         goto fail;
 264                 }
 265                 td->qt_next = cpu_to_hc32(QT_NEXT_TERMINATE);
 266                 td->qt_altnext = cpu_to_hc32(QT_NEXT_TERMINATE);
 267                 token = (toggle << 31) |
 268                     (0 << 16) |
 269                     (1 << 15) |
 270                     (0 << 12) |
 271                     (3 << 10) |
 272                     ((usb_pipein(pipe) ? 0 : 1) << 8) | (0x80 << 0);
 273                 td->qt_token = cpu_to_hc32(token);
 274                 *tdp = cpu_to_hc32((uint32_t) td);
 275                 tdp = &td->qt_next;
 276         }
 277
 278         qh_list.qh_link = cpu_to_hc32((uint32_t) qh | QH_LINK_TYPE_QH);
 279
 280         usbsts = ehci_readl(hcor->or_usbsts);
 281         ehci_writel(hcor->or_usbsts, (usbsts & 0x3f));
 282
 283         /* Enable async. schedule. */
 284         cmd = ehci_readl(hcor->or_usbcmd);
 285         hcor->or_usbcmd |= CMD_ASE;
 286         ehci_writel(hcor->or_usbcmd, cmd);
 287
 288         while ((ehci_readl(hcor->or_usbsts) & STD_ASS) == 0)
 289                 udelay(1);
 290
 291         /* Wait for TDs to be processed. */
 292         ts = get_timer(0);
 293         vtd = td;
 294         do {
 295                 token = hc32_to_cpu(vtd->qt_token);
 296                 if (!(token & 0x80))
 297                         break;
 298         } while (get_timer(ts) < CONFIG_SYS_HZ);
 299
 300         /* Disable async schedule. */
 301         cmd = ehci_readl(hcor->or_usbcmd);
 302         cmd &= ~CMD_ASE;
 303         ehci_writel(hcor->or_usbcmd, cmd);
 304         while ((ehci_readl(hcor->or_usbsts) & STD_ASS) != 0)
 305                 udelay(1);
 306
 307         qh_list.qh_link = cpu_to_hc32((uint32_t)&qh_list | QH_LINK_TYPE_QH);
 308
 309         token = hc32_to_cpu(qh->qh_overlay.qt_token);
 310         if (!(token & 0x80)) {
 311                 debug("TOKEN=%#x\n", token);
 312                 switch (token & 0xfc) {
 313                 case 0:
 314                         toggle = token >> 31;
 315                         usb_settoggle(dev, usb_pipeendpoint(pipe),
 316                                        usb_pipeout(pipe), toggle);
 317                         dev->status = 0;
 318                         break;
 319                 case 0x40:
 320                         dev->status = USB_ST_STALLED;
 321                         break;
 322                 case 0xa0:
 323                 case 0x20:
 324                         dev->status = USB_ST_BUF_ERR;
 325                         break;
 326                 case 0x50:
 327                 case 0x10:
 328                         dev->status = USB_ST_BABBLE_DET;
 329                         break;
 330                 default:
 331                         dev->status = USB_ST_CRC_ERR;
 332                         break;
 333                 }
 334                 dev->act_len = length - ((token >> 16) & 0x7fff);
 335         } else {
 336                 dev->act_len = 0;
 337                 debug("dev=%u, usbsts=%#x, p[1]=%#x, p[2]=%#x\n",
 338                       dev->devnum, ehci_readl(hcor->or_usbsts),
 339                       ehci_readl(hcor->or_portsc[0]),
 340                       ehci_readl(hcor->or_portsc[1]));
 341         }
 342
 343         return (dev->status != USB_ST_NOT_PROC) ? 0 : -1;
 344
 345 fail:
 346         td = (void *)hc32_to_cpu(qh->qh_overlay.qt_next);
 347         while (td != (void *)QT_NEXT_TERMINATE) {
 348                 qh->qh_overlay.qt_next = td->qt_next;
 349                 ehci_free(td, sizeof(*td));
 350                 td = (void *)hc32_to_cpu(qh->qh_overlay.qt_next);
 351         }
 352         ehci_free(qh, sizeof(*qh));
 353         return -1;
 354 }
 355
 356 static inline int min3(int a, int b, int c)
 357 {
 358
 359         if (b < a)
 360                 a = b;
 361         if (c < a)
 362                 a = c;
 363         return a;
 364 }
 365
 366 int
 367 ehci_submit_root(struct usb_device *dev, unsigned long pipe, void *buffer,
 368                  int length, struct devrequest *req)
 369 {
 370         uint8_t tmpbuf[4];
 371         u16 typeReq;
 372         void *srcptr = NULL;
 373         int len, srclen;
 374         uint32_t reg;
 375
 376         srclen = 0;
 377
 378         debug("req=%u (%#x), type=%u (%#x), value=%u, index=%u\n",
 379               req->request, req->request,
 380               req->requesttype, req->requesttype,
 381               le16_to_cpu(req->value), le16_to_cpu(req->index));
 382
 383         typeReq = req->request << 8 | req->requesttype;
 384
 385         switch (le16_to_cpu(typeReq)) {
 386         case DeviceRequest | USB_REQ_GET_DESCRIPTOR:
 387                 switch (le16_to_cpu(req->value) >> 8) {
 388                 case USB_DT_DEVICE:
 389                         debug("USB_DT_DEVICE request\n");
 390                         srcptr = &descriptor.device;
 391                         srclen = 0x12;
 392                         break;
 393                 case USB_DT_CONFIG:
 394                         debug("USB_DT_CONFIG config\n");
 395                         srcptr = &descriptor.config;
 396                         srclen = 0x19;
 397                         break;
 398                 case USB_DT_STRING:
 399                         debug("USB_DT_STRING config\n");
 400                         switch (le16_to_cpu(req->value) & 0xff) {
 401                         case 0: /* Language */
 402                                 srcptr = "\4\3\1\0";
 403                                 srclen = 4;
 404                                 break;
 405                         case 1: /* Vendor */
 406                                 srcptr = "\16\3u\0-\0b\0o\0o\0t\0";
 407                                 srclen = 14;
 408                                 break;
 409                         case 2: /* Product */
 410                                 srcptr = "\52\3E\0H\0C\0I\0 "
 411                                          "\0H\0o\0s\0t\0 "
 412                                          "\0C\0o\0n\0t\0r\0o\0l\0l\0e\0r\0";
 413                                 srclen = 42;
 414                                 break;
 415                         default:
 416                                 debug("unknown value DT_STRING %x\n",
 417                                         le16_to_cpu(req->value));
 418                                 goto unknown;
 419                         }
 420                         break;
 421                 default:
 422                         debug("unknown value %x\n", le16_to_cpu(req->value));
 423                         goto unknown;
 424                 }
 425                 break;
 426         case USB_REQ_GET_DESCRIPTOR | ((USB_DIR_IN | USB_RT_HUB) << 8):
 427                 switch (le16_to_cpu(req->value) >> 8) {
 428                 case USB_DT_HUB:
 429                         debug("USB_DT_HUB config\n");
 430                         srcptr = &descriptor.hub;
 431                         srclen = 0x8;
 432                         break;
 433                 default:
 434                         debug("unknown value %x\n", le16_to_cpu(req->value));
 435                         goto unknown;
 436                 }
 437                 break;
 438         case USB_REQ_SET_ADDRESS | (USB_RECIP_DEVICE << 8):
 439                 debug("USB_REQ_SET_ADDRESS\n");
 440                 rootdev = le16_to_cpu(req->value);
 441                 break;
 442         case DeviceOutRequest | USB_REQ_SET_CONFIGURATION:
 443                 debug("USB_REQ_SET_CONFIGURATION\n");
 444                 /* Nothing to do */
 445                 break;
 446         case USB_REQ_GET_STATUS | ((USB_DIR_IN | USB_RT_HUB) << 8):
 447                 tmpbuf[0] = 1;  /* USB_STATUS_SELFPOWERED */
 448                 tmpbuf[1] = 0;
 449                 srcptr = tmpbuf;
 450                 srclen = 2;
 451                 break;
 452         case USB_REQ_GET_STATUS | ((USB_RT_PORT | USB_DIR_IN) << 8):
 453                 memset(tmpbuf, 0, 4);
 454                 reg = ehci_readl(hcor->or_portsc[le16_to_cpu(req->index)
 455                                    - 1]);
 456                 if (reg & EHCI_PS_CS)
 457                         tmpbuf[0] |= USB_PORT_STAT_CONNECTION;
 458                 if (reg & EHCI_PS_PE)
 459                         tmpbuf[0] |= USB_PORT_STAT_ENABLE;
 460                 if (reg & EHCI_PS_SUSP)
 461                         tmpbuf[0] |= USB_PORT_STAT_SUSPEND;
 462                 if (reg & EHCI_PS_OCA)
 463                         tmpbuf[0] |= USB_PORT_STAT_OVERCURRENT;
 464                 if (reg & EHCI_PS_PR)
 465                         tmpbuf[0] |= USB_PORT_STAT_RESET;
 466                 if (reg & EHCI_PS_PP)
 467                         tmpbuf[1] |= USB_PORT_STAT_POWER >> 8;
 468                 tmpbuf[1] |= USB_PORT_STAT_HIGH_SPEED >> 8;
 469
 470                 if (reg & EHCI_PS_CSC)
 471                         tmpbuf[2] |= USB_PORT_STAT_C_CONNECTION;
 472                 if (reg & EHCI_PS_PEC)
 473                         tmpbuf[2] |= USB_PORT_STAT_C_ENABLE;
 474                 if (reg & EHCI_PS_OCC)
 475                         tmpbuf[2] |= USB_PORT_STAT_C_OVERCURRENT;
 476                 if (portreset & (1 << le16_to_cpu(req->index)))
 477                         tmpbuf[2] |= USB_PORT_STAT_C_RESET;
 478                 srcptr = tmpbuf;
 479                 srclen = 4;
 480                 break;
 481         case USB_REQ_SET_FEATURE | ((USB_DIR_OUT | USB_RT_PORT) << 8):
 482                 reg = ehci_readl(hcor->or_portsc[le16_to_cpu(req->index) - 1]);
 483                 reg &= ~EHCI_PS_CLEAR;
 484                 switch (le16_to_cpu(req->value)) {
 485                 case USB_PORT_FEAT_POWER:
 486                         reg |= EHCI_PS_PP;
 487                         break;
 488                 case USB_PORT_FEAT_RESET:
 489                         debug("USB FEAT RESET\n");
 490                         if (EHCI_PS_IS_LOWSPEED(reg)) {
 491                                 /* Low speed device, give up ownership. */
 492                                 reg |= EHCI_PS_PO;
 493                                 break;
 494                         }
 495                         /* Start reset sequence. */
 496                         reg &= ~EHCI_PS_PE;
 497                         reg |= EHCI_PS_PR;
 498                         ehci_writel(hcor->or_portsc[
 499                                 le16_to_cpu(req->index) - 1], reg);
 500                         /* Wait for reset to complete. */
 501                         udelay(500000);
 502                         /* Terminate reset sequence. */
 503                         reg &= ~EHCI_PS_PR;
 504                         /* TODO: is it only fsl chip that requires this
 505                          * manual setting of port enable?
 506                          */
 507                         reg |= EHCI_PS_PE;
 508                         ehci_writel(hcor->or_portsc[
 509                                 le16_to_cpu(req->index) - 1], reg);
 510                         /* Wait for HC to complete reset. */
 511                         udelay(2000);
 512                         reg =
 513                             ehci_readl(hcor->or_portsc[le16_to_cpu(req->index)
 514                                                         - 1]);
 515                         reg &= ~EHCI_PS_CLEAR;
 516                         if ((reg & EHCI_PS_PE) == 0) {
 517                                 /* Not a high speed device, give up
 518                                  * ownership. */
 519                                 reg |= EHCI_PS_PO;
 520                                 break;
 521                         }
 522                         portreset |= 1 << le16_to_cpu(req->index);
 523                         break;
 524                 default:
 525                         debug("unknown feature %x\n", le16_to_cpu(req->value));
 526                         goto unknown;
 527                 }
 528                 ehci_writel(hcor->or_portsc[le16_to_cpu(req->index) - 1], reg);
 529                 break;
 530         case USB_REQ_CLEAR_FEATURE | ((USB_DIR_OUT | USB_RT_PORT) << 8):
 531                 reg = ehci_readl(hcor->or_portsc[le16_to_cpu(req->index) - 1]);
 532                 reg &= ~EHCI_PS_CLEAR;
 533                 switch (le16_to_cpu(req->value)) {
 534                 case USB_PORT_FEAT_ENABLE:
 535                         reg &= ~EHCI_PS_PE;
 536                         break;
 537                 case USB_PORT_FEAT_C_CONNECTION:
 538                         reg |= EHCI_PS_CSC;
 539                         break;
 540                 case USB_PORT_FEAT_C_RESET:
 541                         portreset &= ~(1 << le16_to_cpu(req->index));
 542                         break;
 543                 default:
 544                         debug("unknown feature %x\n", le16_to_cpu(req->value));
 545                         goto unknown;
 546                 }
 547                 ehci_writel(hcor->or_portsc[le16_to_cpu(req->index) - 1], reg);
 548                 break;
 549         default:
 550                 debug("Unknown request\n");
 551                 goto unknown;
 552         }
 553
 554         wait_ms(1);
 555         len = min3(srclen, le16_to_cpu(req->length), length);
 556         if (srcptr != NULL && len > 0)
 557                 memcpy(buffer, srcptr, len);
 558         else
 559                 debug("Len is 0\n");
 560
 561         dev->act_len = len;
 562         dev->status = 0;
 563         return 0;
 564
 565 unknown:
 566         debug("requesttype=%x, request=%x, value=%x, index=%x, length=%x\n",
 567               req->requesttype, req->request, le16_to_cpu(req->value),
 568               le16_to_cpu(req->index), le16_to_cpu(req->length));
 569
 570         dev->act_len = 0;
 571         dev->status = USB_ST_STALLED;
 572         return -1;
 573 }
 574
 575 int usb_lowlevel_stop(void)
 576 {
 577         return ehci_hcd_stop();
 578 }
 579
 580 int usb_lowlevel_init(void)
 581 {
 582         uint32_t reg;
 583         uint32_t cmd;
 584
 585         if (ehci_hcd_init() != 0)
 586                 return -1;
 587
 588         /* Set head of reclaim list */
 589         memset(&qh_list, 0, sizeof(qh_list));
 590         qh_list.qh_link = cpu_to_hc32((uint32_t)&qh_list | QH_LINK_TYPE_QH);
 591         qh_list.qh_endpt1 = cpu_to_hc32((1 << 15) | (USB_SPEED_HIGH << 12));
 592         qh_list.qh_curtd = cpu_to_hc32(QT_NEXT_TERMINATE);
 593         qh_list.qh_overlay.qt_next = cpu_to_hc32(QT_NEXT_TERMINATE);
 594         qh_list.qh_overlay.qt_altnext = cpu_to_hc32(QT_NEXT_TERMINATE);
 595         qh_list.qh_overlay.qt_token = cpu_to_hc32(0x40);
 596
 597         /* Set async. queue head pointer. */
 598         ehci_writel(hcor->or_asynclistaddr, (uint32_t)&qh_list);
 599
 600         reg = ehci_readl(hccr->cr_hcsparams);
 601         descriptor.hub.bNbrPorts = reg & 0xf;
 602         printf("NbrPorts %x\n", descriptor.hub.bNbrPorts);
 603         if (reg & 0x10000)      /* Port Indicators */
 604                 descriptor.hub.wHubCharacteristics |= 0x80;
 605         if (reg & 0x10)         /* Port Power Control */
 606                 descriptor.hub.wHubCharacteristics |= 0x01;
 607
 608         /* take control over the ports */
 609         cmd = ehci_readl(hcor->or_configflag);
 610         cmd |= 1;
 611         ehci_writel(hcor->or_configflag, cmd);
 612
 613         /* Start the host controller. */
 614         cmd = ehci_readl(hcor->or_configflag);
 615         cmd |= 1;
 616         ehci_writel(hcor->or_usbcmd, cmd);
 617
 618         rootdev = 0;
 619
 620         return 0;
 621 }
 622
 623 int
 624 submit_bulk_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
 625                 int length)
 626 {
 627
 628         if (usb_pipetype(pipe) != PIPE_BULK) {
 629                 debug("non-bulk pipe (type=%lu)", usb_pipetype(pipe));
 630                 return -1;
 631         }
 632         return ehci_submit_async(dev, pipe, buffer, length, NULL);
 633 }
 634
 635 int
 636 submit_control_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
 637                    int length, struct devrequest *setup)
 638 {
 639
 640         if (usb_pipetype(pipe) != PIPE_CONTROL) {
 641                 debug("non-control pipe (type=%lu)", usb_pipetype(pipe));
 642                 return -1;
 643         }
 644
 645         if (usb_pipedevice(pipe) == rootdev) {
 646                 if (rootdev == 0)
 647                         dev->speed = USB_SPEED_HIGH;
 648                 return ehci_submit_root(dev, pipe, buffer, length, setup);
 649         }
 650         return ehci_submit_async(dev, pipe, buffer, length, setup);
 651 }
 652
 653 int
 654 submit_int_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
 655                int length, int interval)
 656 {
 657
 658         debug("dev=%p, pipe=%lu, buffer=%p, length=%d, interval=%d",
 659               dev, pipe, buffer, length, interval);
 660         return -1;
 661 }