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  * 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 "usb_ehci.h"
  29
  30 int rootdev;
  31 struct ehci_hccr *hccr;         /* R/O registers, not need for volatile */
  32 volatile struct ehci_hcor *hcor;
  33
  34 static uint16_t portreset;
  35 static struct QH qh_list __attribute__((aligned(32)));
  36
  37 static struct descriptor {
  38         struct usb_hub_descriptor hub;
  39         struct usb_device_descriptor device;
  40         struct usb_linux_config_descriptor config;
  41         struct usb_linux_interface_descriptor interface;
  42         struct usb_endpoint_descriptor endpoint;
  43 }  __attribute__ ((packed)) descriptor = {
  44         {
  45                 0x8,            /* bDescLength */
  46                 0x29,           /* bDescriptorType: hub descriptor */
  47                 2,              /* bNrPorts -- runtime modified */
  48                 0,              /* wHubCharacteristics */
  49                 0xff,           /* bPwrOn2PwrGood */
  50                 0,              /* bHubCntrCurrent */
  51                 {},             /* Device removable */
  52                 {}              /* at most 7 ports! XXX */
  53         },
  54         {
  55                 0x12,           /* bLength */
  56                 1,              /* bDescriptorType: UDESC_DEVICE */
  57                 0x0002,         /* bcdUSB: v2.0 */
  58                 9,              /* bDeviceClass: UDCLASS_HUB */
  59                 0,              /* bDeviceSubClass: UDSUBCLASS_HUB */
  60                 1,              /* bDeviceProtocol: UDPROTO_HSHUBSTT */
  61                 64,             /* bMaxPacketSize: 64 bytes */
  62                 0x0000,         /* idVendor */
  63                 0x0000,         /* idProduct */
  64                 0x0001,         /* bcdDevice */
  65                 1,              /* iManufacturer */
  66                 2,              /* iProduct */
  67                 0,              /* iSerialNumber */
  68                 1               /* bNumConfigurations: 1 */
  69         },
  70         {
  71                 0x9,
  72                 2,              /* bDescriptorType: UDESC_CONFIG */
  73                 cpu_to_le16(0x19),
  74                 1,              /* bNumInterface */
  75                 1,              /* bConfigurationValue */
  76                 0,              /* iConfiguration */
  77                 0x40,           /* bmAttributes: UC_SELF_POWER */
  78                 0               /* bMaxPower */
  79         },
  80         {
  81                 0x9,            /* bLength */
  82                 4,              /* bDescriptorType: UDESC_INTERFACE */
  83                 0,              /* bInterfaceNumber */
  84                 0,              /* bAlternateSetting */
  85                 1,              /* bNumEndpoints */
  86                 9,              /* bInterfaceClass: UICLASS_HUB */
  87                 0,              /* bInterfaceSubClass: UISUBCLASS_HUB */
  88                 0,              /* bInterfaceProtocol: UIPROTO_HSHUBSTT */
  89                 0               /* iInterface */
  90         },
  91         {
  92                 0x7,            /* bLength */
  93                 5,              /* bDescriptorType: UDESC_ENDPOINT */
  94                 0x81,           /* bEndpointAddress:
  95                                  * UE_DIR_IN | EHCI_INTR_ENDPT
  96                                  */
  97                 3,              /* bmAttributes: UE_INTERRUPT */
  98                 8, 0,           /* wMaxPacketSize */
  99                 255             /* bInterval */
 100         },
 101 };
 102
 103 #if defined(CONFIG_EHCI_IS_TDI)
 104 #define ehci_is_TDI()   (1)
 105 #else
 106 #define ehci_is_TDI()   (0)
 107 #endif
 108
 109 static int handshake(uint32_t *ptr, uint32_t mask, uint32_t done, int msec)
 110 {
 111         uint32_t result;
 112         do {
 113                 result = ehci_readl(ptr);
 114                 debug("handshake read reg(%x)=%x\n", (uint32_t)ptr, result);
 115                 if (result == ~(uint32_t)0)
 116                         return -1;
 117                 result &= mask;
 118                 if (result == done)
 119                         return 0;
 120                 wait_ms(1);
 121                 msec--;
 122         } while (msec > 0);
 123         return -1;
 124 }
 125
 126 static void ehci_free(void *p, size_t sz)
 127 {
 128
 129 }
 130
 131 static int ehci_reset(void)
 132 {
 133         uint32_t cmd;
 134         uint32_t tmp;
 135         uint32_t *reg_ptr;
 136         int ret = 0;
 137
 138         cmd = ehci_readl(&hcor->or_usbcmd);
 139         cmd |= CMD_RESET;
 140         ehci_writel(&hcor->or_usbcmd, cmd);
 141         ret = handshake((uint32_t *)&hcor->or_usbcmd, CMD_RESET, 0, 250);
 142         if (ret < 0) {
 143                 printf("EHCI fail to reset\n");
 144                 goto out;
 145         }
 146
 147 #if defined(CONFIG_EHCI_IS_TDI)
 148         reg_ptr = (uint32_t *)((u8 *)hcor + USBMODE);
 149         tmp = ehci_readl(reg_ptr);
 150         tmp |= USBMODE_CM_HC;
 151 #if defined(CONFIG_EHCI_MMIO_BIG_ENDIAN)
 152         tmp |= USBMODE_BE;
 153 #endif
 154         ehci_writel(reg_ptr, tmp);
 155 #endif
 156 out:
 157         return ret;
 158 }
 159
 160 static void *ehci_alloc(size_t sz, size_t align)
 161 {
 162         static struct QH qh __attribute__((aligned(32)));
 163         static struct qTD td[3] __attribute__((aligned (32)));
 164         static int ntds;
 165         void *p;
 166
 167         switch (sz) {
 168         case sizeof(struct QH):
 169                 p = &qh;
 170                 ntds = 0;
 171                 break;
 172         case sizeof(struct qTD):
 173                 if (ntds == 3) {
 174                         debug("out of TDs\n");
 175                         return NULL;
 176                 }
 177                 p = &td[ntds];
 178                 ntds++;
 179                 break;
 180         default:
 181                 debug("unknown allocation size\n");
 182                 return NULL;
 183         }
 184
 185         memset(p, sz, 0);
 186         return p;
 187 }
 188
 189 static int ehci_td_buffer(struct qTD *td, void *buf, size_t sz)
 190 {
 191         uint32_t addr, delta, next;
 192         int idx;
 193
 194         addr = (uint32_t) buf;
 195         idx = 0;
 196         while (idx < 5) {
 197                 td->qt_buffer[idx] = cpu_to_hc32(addr);
 198                 next = (addr + 4096) & ~4095;
 199                 delta = next - addr;
 200                 if (delta >= sz)
 201                         break;
 202                 sz -= delta;
 203                 addr = next;
 204                 idx++;
 205         }
 206
 207         if (idx == 5) {
 208                 debug("out of buffer pointers (%u bytes left)\n", sz);
 209                 return -1;
 210         }
 211
 212         return 0;
 213 }
 214
 215 static int
 216 ehci_submit_async(struct usb_device *dev, unsigned long pipe, void *buffer,
 217                    int length, struct devrequest *req)
 218 {
 219         struct QH *qh;
 220         struct qTD *td;
 221         volatile struct qTD *vtd;
 222         unsigned long ts;
 223         uint32_t *tdp;
 224         uint32_t endpt, token, usbsts;
 225         uint32_t c, toggle;
 226         uint32_t cmd;
 227         uint32_t sts;
 228
 229         debug("dev=%p, pipe=%lx, buffer=%p, length=%d, req=%p\n", dev, pipe,
 230               buffer, length, req);
 231         if (req != NULL)
 232                 debug("req=%u (%#x), type=%u (%#x), value=%u (%#x), index=%u\n",
 233                       req->request, req->request,
 234                       req->requesttype, req->requesttype,
 235                       le16_to_cpu(req->value), le16_to_cpu(req->value),
 236                       le16_to_cpu(req->index));
 237
 238         qh = ehci_alloc(sizeof(struct QH), 32);
 239         if (qh == NULL) {
 240                 debug("unable to allocate QH\n");
 241                 return -1;
 242         }
 243         qh->qh_link = cpu_to_hc32((uint32_t)&qh_list | QH_LINK_TYPE_QH);
 244         c = (usb_pipespeed(pipe) != USB_SPEED_HIGH &&
 245              usb_pipeendpoint(pipe) == 0) ? 1 : 0;
 246         endpt = (8 << 28) |
 247             (c << 27) |
 248             (usb_maxpacket(dev, pipe) << 16) |
 249             (0 << 15) |
 250             (1 << 14) |
 251             (usb_pipespeed(pipe) << 12) |
 252             (usb_pipeendpoint(pipe) << 8) |
 253             (0 << 7) | (usb_pipedevice(pipe) << 0);
 254         qh->qh_endpt1 = cpu_to_hc32(endpt);
 255         endpt = (1 << 30) |
 256             (dev->portnr << 23) |
 257             (dev->parent->devnum << 16) | (0 << 8) | (0 << 0);
 258         qh->qh_endpt2 = cpu_to_hc32(endpt);
 259         qh->qh_overlay.qt_next = cpu_to_hc32(QT_NEXT_TERMINATE);
 260         qh->qh_overlay.qt_altnext = cpu_to_hc32(QT_NEXT_TERMINATE);
 261
 262         td = NULL;
 263         tdp = &qh->qh_overlay.qt_next;
 264
 265         toggle =
 266             usb_gettoggle(dev, usb_pipeendpoint(pipe), usb_pipeout(pipe));
 267
 268         if (req != NULL) {
 269                 td = ehci_alloc(sizeof(struct qTD), 32);
 270                 if (td == NULL) {
 271                         debug("unable to allocate SETUP td\n");
 272                         goto fail;
 273                 }
 274                 td->qt_next = cpu_to_hc32(QT_NEXT_TERMINATE);
 275                 td->qt_altnext = cpu_to_hc32(QT_NEXT_TERMINATE);
 276                 token = (0 << 31) |
 277                     (sizeof(*req) << 16) |
 278                     (0 << 15) | (0 << 12) | (3 << 10) | (2 << 8) | (0x80 << 0);
 279                 td->qt_token = cpu_to_hc32(token);
 280                 if (ehci_td_buffer(td, req, sizeof(*req)) != 0) {
 281                         debug("unable construct SETUP td\n");
 282                         ehci_free(td, sizeof(*td));
 283                         goto fail;
 284                 }
 285                 *tdp = cpu_to_hc32((uint32_t) td);
 286                 tdp = &td->qt_next;
 287                 toggle = 1;
 288         }
 289
 290         if (length > 0 || req == NULL) {
 291                 td = ehci_alloc(sizeof(struct qTD), 32);
 292                 if (td == NULL) {
 293                         debug("unable to allocate DATA td\n");
 294                         goto fail;
 295                 }
 296                 td->qt_next = cpu_to_hc32(QT_NEXT_TERMINATE);
 297                 td->qt_altnext = cpu_to_hc32(QT_NEXT_TERMINATE);
 298                 token = (toggle << 31) |
 299                     (length << 16) |
 300                     ((req == NULL ? 1 : 0) << 15) |
 301                     (0 << 12) |
 302                     (3 << 10) |
 303                     ((usb_pipein(pipe) ? 1 : 0) << 8) | (0x80 << 0);
 304                 td->qt_token = cpu_to_hc32(token);
 305                 if (ehci_td_buffer(td, buffer, length) != 0) {
 306                         debug("unable construct DATA td\n");
 307                         ehci_free(td, sizeof(*td));
 308                         goto fail;
 309                 }
 310                 *tdp = cpu_to_hc32((uint32_t) td);
 311                 tdp = &td->qt_next;
 312         }
 313
 314         if (req != NULL) {
 315                 td = ehci_alloc(sizeof(struct qTD), 32);
 316                 if (td == NULL) {
 317                         debug("unable to allocate ACK td\n");
 318                         goto fail;
 319                 }
 320                 td->qt_next = cpu_to_hc32(QT_NEXT_TERMINATE);
 321                 td->qt_altnext = cpu_to_hc32(QT_NEXT_TERMINATE);
 322                 token = (toggle << 31) |
 323                     (0 << 16) |
 324                     (1 << 15) |
 325                     (0 << 12) |
 326                     (3 << 10) |
 327                     ((usb_pipein(pipe) ? 0 : 1) << 8) | (0x80 << 0);
 328                 td->qt_token = cpu_to_hc32(token);
 329                 *tdp = cpu_to_hc32((uint32_t) td);
 330                 tdp = &td->qt_next;
 331         }
 332
 333         qh_list.qh_link = cpu_to_hc32((uint32_t) qh | QH_LINK_TYPE_QH);
 334
 335         usbsts = ehci_readl(&hcor->or_usbsts);
 336         ehci_writel(&hcor->or_usbsts, (usbsts & 0x3f));
 337
 338         /* Enable async. schedule. */
 339         cmd = ehci_readl(&hcor->or_usbcmd);
 340         cmd |= CMD_ASE;
 341         ehci_writel(&hcor->or_usbcmd, cmd);
 342
 343         sts = ehci_readl(&hcor->or_usbsts);
 344         while ((sts & STD_ASS) == 0) {
 345                 sts = ehci_readl(&hcor->or_usbsts);
 346                 udelay(10);
 347         }
 348
 349         /* Wait for TDs to be processed. */
 350         ts = get_timer(0);
 351         vtd = td;
 352         do {
 353                 token = hc32_to_cpu(vtd->qt_token);
 354                 if (!(token & 0x80))
 355                         break;
 356         } while (get_timer(ts) < CONFIG_SYS_HZ);
 357
 358         /* Disable async schedule. */
 359         cmd = ehci_readl(&hcor->or_usbcmd);
 360         cmd &= ~CMD_ASE;
 361         ehci_writel(&hcor->or_usbcmd, cmd);
 362
 363         sts = ehci_readl(&hcor->or_usbsts);
 364         while ((sts & STD_ASS) != 0) {
 365                 sts = ehci_readl(&hcor->or_usbsts);
 366                 udelay(10);
 367         }
 368
 369         qh_list.qh_link = cpu_to_hc32((uint32_t)&qh_list | QH_LINK_TYPE_QH);
 370
 371         token = hc32_to_cpu(qh->qh_overlay.qt_token);
 372         if (!(token & 0x80)) {
 373                 debug("TOKEN=%#x\n", token);
 374                 switch (token & 0xfc) {
 375                 case 0:
 376                         toggle = token >> 31;
 377                         usb_settoggle(dev, usb_pipeendpoint(pipe),
 378                                        usb_pipeout(pipe), toggle);
 379                         dev->status = 0;
 380                         break;
 381                 case 0x40:
 382                         dev->status = USB_ST_STALLED;
 383                         break;
 384                 case 0xa0:
 385                 case 0x20:
 386                         dev->status = USB_ST_BUF_ERR;
 387                         break;
 388                 case 0x50:
 389                 case 0x10:
 390                         dev->status = USB_ST_BABBLE_DET;
 391                         break;
 392                 default:
 393                         dev->status = USB_ST_CRC_ERR;
 394                         break;
 395                 }
 396                 dev->act_len = length - ((token >> 16) & 0x7fff);
 397         } else {
 398                 dev->act_len = 0;
 399                 debug("dev=%u, usbsts=%#x, p[1]=%#x, p[2]=%#x\n",
 400                       dev->devnum, ehci_readl(&hcor->or_usbsts),
 401                       ehci_readl(&hcor->or_portsc[0]),
 402                       ehci_readl(&hcor->or_portsc[1]));
 403         }
 404
 405         return (dev->status != USB_ST_NOT_PROC) ? 0 : -1;
 406
 407 fail:
 408         td = (void *)hc32_to_cpu(qh->qh_overlay.qt_next);
 409         while (td != (void *)QT_NEXT_TERMINATE) {
 410                 qh->qh_overlay.qt_next = td->qt_next;
 411                 ehci_free(td, sizeof(*td));
 412                 td = (void *)hc32_to_cpu(qh->qh_overlay.qt_next);
 413         }
 414         ehci_free(qh, sizeof(*qh));
 415         return -1;
 416 }
 417
 418 static inline int min3(int a, int b, int c)
 419 {
 420
 421         if (b < a)
 422                 a = b;
 423         if (c < a)
 424                 a = c;
 425         return a;
 426 }
 427
 428 int
 429 ehci_submit_root(struct usb_device *dev, unsigned long pipe, void *buffer,
 430                  int length, struct devrequest *req)
 431 {
 432         uint8_t tmpbuf[4];
 433         u16 typeReq;
 434         void *srcptr = NULL;
 435         int len, srclen;
 436         uint32_t reg;
 437         uint32_t *status_reg;
 438
 439         if (le16_to_cpu(req->index) >= CONFIG_SYS_USB_EHCI_MAX_ROOT_PORTS) {
 440                 printf("The request port(%d) is not configured\n",
 441                         le16_to_cpu(req->index) - 1);
 442                 return -1;
 443         }
 444         status_reg = (uint32_t *)&hcor->or_portsc[
 445                                                 le16_to_cpu(req->index) - 1];
 446         srclen = 0;
 447
 448         debug("req=%u (%#x), type=%u (%#x), value=%u, index=%u\n",
 449               req->request, req->request,
 450               req->requesttype, req->requesttype,
 451               le16_to_cpu(req->value), le16_to_cpu(req->index));
 452
 453         typeReq = req->request << 8 | req->requesttype;
 454
 455         switch (le16_to_cpu(typeReq)) {
 456         case DeviceRequest | USB_REQ_GET_DESCRIPTOR:
 457                 switch (le16_to_cpu(req->value) >> 8) {
 458                 case USB_DT_DEVICE:
 459                         debug("USB_DT_DEVICE request\n");
 460                         srcptr = &descriptor.device;
 461                         srclen = 0x12;
 462                         break;
 463                 case USB_DT_CONFIG:
 464                         debug("USB_DT_CONFIG config\n");
 465                         srcptr = &descriptor.config;
 466                         srclen = 0x19;
 467                         break;
 468                 case USB_DT_STRING:
 469                         debug("USB_DT_STRING config\n");
 470                         switch (le16_to_cpu(req->value) & 0xff) {
 471                         case 0: /* Language */
 472                                 srcptr = "\4\3\1\0";
 473                                 srclen = 4;
 474                                 break;
 475                         case 1: /* Vendor */
 476                                 srcptr = "\16\3u\0-\0b\0o\0o\0t\0";
 477                                 srclen = 14;
 478                                 break;
 479                         case 2: /* Product */
 480                                 srcptr = "\52\3E\0H\0C\0I\0 "
 481                                          "\0H\0o\0s\0t\0 "
 482                                          "\0C\0o\0n\0t\0r\0o\0l\0l\0e\0r\0";
 483                                 srclen = 42;
 484                                 break;
 485                         default:
 486                                 debug("unknown value DT_STRING %x\n",
 487                                         le16_to_cpu(req->value));
 488                                 goto unknown;
 489                         }
 490                         break;
 491                 default:
 492                         debug("unknown value %x\n", le16_to_cpu(req->value));
 493                         goto unknown;
 494                 }
 495                 break;
 496         case USB_REQ_GET_DESCRIPTOR | ((USB_DIR_IN | USB_RT_HUB) << 8):
 497                 switch (le16_to_cpu(req->value) >> 8) {
 498                 case USB_DT_HUB:
 499                         debug("USB_DT_HUB config\n");
 500                         srcptr = &descriptor.hub;
 501                         srclen = 0x8;
 502                         break;
 503                 default:
 504                         debug("unknown value %x\n", le16_to_cpu(req->value));
 505                         goto unknown;
 506                 }
 507                 break;
 508         case USB_REQ_SET_ADDRESS | (USB_RECIP_DEVICE << 8):
 509                 debug("USB_REQ_SET_ADDRESS\n");
 510                 rootdev = le16_to_cpu(req->value);
 511                 break;
 512         case DeviceOutRequest | USB_REQ_SET_CONFIGURATION:
 513                 debug("USB_REQ_SET_CONFIGURATION\n");
 514                 /* Nothing to do */
 515                 break;
 516         case USB_REQ_GET_STATUS | ((USB_DIR_IN | USB_RT_HUB) << 8):
 517                 tmpbuf[0] = 1;  /* USB_STATUS_SELFPOWERED */
 518                 tmpbuf[1] = 0;
 519                 srcptr = tmpbuf;
 520                 srclen = 2;
 521                 break;
 522         case USB_REQ_GET_STATUS | ((USB_RT_PORT | USB_DIR_IN) << 8):
 523                 memset(tmpbuf, 0, 4);
 524                 reg = ehci_readl(status_reg);
 525                 if (reg & EHCI_PS_CS)
 526                         tmpbuf[0] |= USB_PORT_STAT_CONNECTION;
 527                 if (reg & EHCI_PS_PE)
 528                         tmpbuf[0] |= USB_PORT_STAT_ENABLE;
 529                 if (reg & EHCI_PS_SUSP)
 530                         tmpbuf[0] |= USB_PORT_STAT_SUSPEND;
 531                 if (reg & EHCI_PS_OCA)
 532                         tmpbuf[0] |= USB_PORT_STAT_OVERCURRENT;
 533                 if (reg & EHCI_PS_PR &&
 534                     (portreset & (1 << le16_to_cpu(req->index)))) {
 535                         int ret;
 536                         /* force reset to complete */
 537                         reg = reg & ~(EHCI_PS_PR | EHCI_PS_CLEAR);
 538                         ehci_writel(status_reg, reg);
 539                         ret = handshake(status_reg, EHCI_PS_PR, 0, 2);
 540                         if (!ret)
 541                                 tmpbuf[0] |= USB_PORT_STAT_RESET;
 542                         else
 543                                 printf("port(%d) reset error\n",
 544                                         le16_to_cpu(req->index) - 1);
 545                 }
 546                 if (reg & EHCI_PS_PP)
 547                         tmpbuf[1] |= USB_PORT_STAT_POWER >> 8;
 548                 tmpbuf[1] |= USB_PORT_STAT_HIGH_SPEED >> 8;
 549
 550                 if (reg & EHCI_PS_CSC)
 551                         tmpbuf[2] |= USB_PORT_STAT_C_CONNECTION;
 552                 if (reg & EHCI_PS_PEC)
 553                         tmpbuf[2] |= USB_PORT_STAT_C_ENABLE;
 554                 if (reg & EHCI_PS_OCC)
 555                         tmpbuf[2] |= USB_PORT_STAT_C_OVERCURRENT;
 556                 if (portreset & (1 << le16_to_cpu(req->index)))
 557                         tmpbuf[2] |= USB_PORT_STAT_C_RESET;
 558
 559                 srcptr = tmpbuf;
 560                 srclen = 4;
 561                 break;
 562         case USB_REQ_SET_FEATURE | ((USB_DIR_OUT | USB_RT_PORT) << 8):
 563                 reg = ehci_readl(status_reg);
 564                 reg &= ~EHCI_PS_CLEAR;
 565                 switch (le16_to_cpu(req->value)) {
 566                 case USB_PORT_FEAT_ENABLE:
 567                         reg |= EHCI_PS_PE;
 568                         ehci_writel(status_reg, reg);
 569                         break;
 570                 case USB_PORT_FEAT_POWER:
 571                         if (HCS_PPC(ehci_readl(&hccr->cr_hcsparams))) {
 572                                 reg |= EHCI_PS_PP;
 573                                 ehci_writel(status_reg, reg);
 574                         }
 575                         break;
 576                 case USB_PORT_FEAT_RESET:
 577                         if ((reg & (EHCI_PS_PE | EHCI_PS_CS)) == EHCI_PS_CS &&
 578                             !ehci_is_TDI() &&
 579                             EHCI_PS_IS_LOWSPEED(reg)) {
 580                                 /* Low speed device, give up ownership. */
 581                                 debug("port %d low speed --> companion\n",
 582                                       req->index - 1);
 583                                 reg |= EHCI_PS_PO;
 584                                 ehci_writel(status_reg, reg);
 585                                 break;
 586                         } else {
 587                                 reg |= EHCI_PS_PR;
 588                                 reg &= ~EHCI_PS_PE;
 589                                 ehci_writel(status_reg, reg);
 590                                 /*
 591                                  * caller must wait, then call GetPortStatus
 592                                  * usb 2.0 specification say 50 ms resets on
 593                                  * root
 594                                  */
 595                                 wait_ms(50);
 596                                 portreset |= 1 << le16_to_cpu(req->index);
 597                         }
 598                         break;
 599                 default:
 600                         debug("unknown feature %x\n", le16_to_cpu(req->value));
 601                         goto unknown;
 602                 }
 603                 /* unblock posted writes */
 604                 ehci_readl(&hcor->or_usbcmd);
 605                 break;
 606         case USB_REQ_CLEAR_FEATURE | ((USB_DIR_OUT | USB_RT_PORT) << 8):
 607                 reg = ehci_readl(status_reg);
 608                 switch (le16_to_cpu(req->value)) {
 609                 case USB_PORT_FEAT_ENABLE:
 610                         reg &= ~EHCI_PS_PE;
 611                         break;
 612                 case USB_PORT_FEAT_C_ENABLE:
 613                         reg = (reg & ~EHCI_PS_CLEAR) | EHCI_PS_PE;
 614                         break;
 615                 case USB_PORT_FEAT_POWER:
 616                         if (HCS_PPC(ehci_readl(&hccr->cr_hcsparams)))
 617                                 reg = reg & ~(EHCI_PS_CLEAR | EHCI_PS_PP);
 618                 case USB_PORT_FEAT_C_CONNECTION:
 619                         reg = (reg & ~EHCI_PS_CLEAR) | EHCI_PS_CSC;
 620                         break;
 621                 case USB_PORT_FEAT_OVER_CURRENT:
 622                         reg = (reg & ~EHCI_PS_CLEAR) | EHCI_PS_OCC;
 623                         break;
 624                 case USB_PORT_FEAT_C_RESET:
 625                         portreset &= ~(1 << le16_to_cpu(req->index));
 626                         break;
 627                 default:
 628                         debug("unknown feature %x\n", le16_to_cpu(req->value));
 629                         goto unknown;
 630                 }
 631                 ehci_writel(status_reg, reg);
 632                 /* unblock posted write */
 633                 ehci_readl(&hcor->or_usbcmd);
 634                 break;
 635         default:
 636                 debug("Unknown request\n");
 637                 goto unknown;
 638         }
 639
 640         wait_ms(1);
 641         len = min3(srclen, le16_to_cpu(req->length), length);
 642         if (srcptr != NULL && len > 0)
 643                 memcpy(buffer, srcptr, len);
 644         else
 645                 debug("Len is 0\n");
 646
 647         dev->act_len = len;
 648         dev->status = 0;
 649         return 0;
 650
 651 unknown:
 652         debug("requesttype=%x, request=%x, value=%x, index=%x, length=%x\n",
 653               req->requesttype, req->request, le16_to_cpu(req->value),
 654               le16_to_cpu(req->index), le16_to_cpu(req->length));
 655
 656         dev->act_len = 0;
 657         dev->status = USB_ST_STALLED;
 658         return -1;
 659 }
 660
 661 int usb_lowlevel_stop(void)
 662 {
 663         return ehci_hcd_stop();
 664 }
 665
 666 int usb_lowlevel_init(void)
 667 {
 668         uint32_t reg;
 669         uint32_t cmd;
 670
 671         if (ehci_hcd_init() != 0)
 672                 return -1;
 673
 674         /* EHCI spec section 4.1 */
 675         if (ehci_reset() != 0)
 676                 return -1;
 677
 678         /* Set head of reclaim list */
 679         memset(&qh_list, 0, sizeof(qh_list));
 680         qh_list.qh_link = cpu_to_hc32((uint32_t)&qh_list | QH_LINK_TYPE_QH);
 681         qh_list.qh_endpt1 = cpu_to_hc32((1 << 15) | (USB_SPEED_HIGH << 12));
 682         qh_list.qh_curtd = cpu_to_hc32(QT_NEXT_TERMINATE);
 683         qh_list.qh_overlay.qt_next = cpu_to_hc32(QT_NEXT_TERMINATE);
 684         qh_list.qh_overlay.qt_altnext = cpu_to_hc32(QT_NEXT_TERMINATE);
 685         qh_list.qh_overlay.qt_token = cpu_to_hc32(0x40);
 686
 687         /* Set async. queue head pointer. */
 688         ehci_writel(&hcor->or_asynclistaddr, (uint32_t)&qh_list);
 689
 690         reg = ehci_readl(&hccr->cr_hcsparams);
 691         descriptor.hub.bNbrPorts = HCS_N_PORTS(reg);
 692         printf("Register %x NbrPorts %d\n", reg, descriptor.hub.bNbrPorts);
 693         /* Port Indicators */
 694         if (HCS_INDICATOR(reg))
 695                 descriptor.hub.wHubCharacteristics |= 0x80;
 696         /* Port Power Control */
 697         if (HCS_PPC(reg))
 698                 descriptor.hub.wHubCharacteristics |= 0x01;
 699
 700         /* Start the host controller. */
 701         cmd = ehci_readl(&hcor->or_usbcmd);
 702         /* Philips, Intel, and maybe others need CMD_RUN before the
 703          * root hub will detect new devices (why?); NEC doesn't */
 704         cmd &= ~(CMD_LRESET|CMD_IAAD|CMD_PSE|CMD_ASE|CMD_RESET);
 705         cmd |= CMD_RUN;
 706         ehci_writel(&hcor->or_usbcmd, cmd);
 707
 708         /* take control over the ports */
 709         cmd = ehci_readl(&hcor->or_configflag);
 710         cmd |= FLAG_CF;
 711         ehci_writel(&hcor->or_configflag, cmd);
 712         /* unblock posted write */
 713         cmd = ehci_readl(&hcor->or_usbcmd);
 714         wait_ms(5);
 715         reg = HC_VERSION(ehci_readl(&hccr->cr_capbase));
 716         printf("USB EHCI %x.%02x\n", reg >> 8, reg & 0xff);
 717
 718         rootdev = 0;
 719
 720         return 0;
 721 }
 722
 723 int
 724 submit_bulk_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
 725                 int length)
 726 {
 727
 728         if (usb_pipetype(pipe) != PIPE_BULK) {
 729                 debug("non-bulk pipe (type=%lu)", usb_pipetype(pipe));
 730                 return -1;
 731         }
 732         return ehci_submit_async(dev, pipe, buffer, length, NULL);
 733 }
 734
 735 int
 736 submit_control_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
 737                    int length, struct devrequest *setup)
 738 {
 739
 740         if (usb_pipetype(pipe) != PIPE_CONTROL) {
 741                 debug("non-control pipe (type=%lu)", usb_pipetype(pipe));
 742                 return -1;
 743         }
 744
 745         if (usb_pipedevice(pipe) == rootdev) {
 746                 if (rootdev == 0)
 747                         dev->speed = USB_SPEED_HIGH;
 748                 return ehci_submit_root(dev, pipe, buffer, length, setup);
 749         }
 750         return ehci_submit_async(dev, pipe, buffer, length, setup);
 751 }
 752
 753 int
 754 submit_int_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
 755                int length, int interval)
 756 {
 757
 758         debug("dev=%p, pipe=%lu, buffer=%p, length=%d, interval=%d",
 759               dev, pipe, buffer, length, interval);
 760         return -1;
 761 }