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
  30 #include "ehci.h"
  31
  32 int rootdev;
  33 struct ehci_hccr *hccr; /* R/O registers, not need for volatile */
  34 volatile struct ehci_hcor *hcor;
  35
  36 static uint16_t portreset;
  37 DEFINE_ALIGN_BUFFER(struct QH, qh_list, 1, USB_DMA_MINALIGN);
  38
  39 #define ALIGN_END_ADDR(type, ptr, size)                 \
  40         ((uint32_t)(ptr) + roundup((size) * sizeof(type), USB_DMA_MINALIGN))
  41
  42 static struct descriptor {
  43         struct usb_hub_descriptor hub;
  44         struct usb_device_descriptor device;
  45         struct usb_linux_config_descriptor config;
  46         struct usb_linux_interface_descriptor interface;
  47         struct usb_endpoint_descriptor endpoint;
  48 }  __attribute__ ((packed)) descriptor = {
  49         {
  50                 0x8,            /* bDescLength */
  51                 0x29,           /* bDescriptorType: hub descriptor */
  52                 2,              /* bNrPorts -- runtime modified */
  53                 0,              /* wHubCharacteristics */
  54                 10,             /* bPwrOn2PwrGood */
  55                 0,              /* bHubCntrCurrent */
  56                 {},             /* Device removable */
  57                 {}              /* at most 7 ports! XXX */
  58         },
  59         {
  60                 0x12,           /* bLength */
  61                 1,              /* bDescriptorType: UDESC_DEVICE */
  62                 cpu_to_le16(0x0200), /* bcdUSB: v2.0 */
  63                 9,              /* bDeviceClass: UDCLASS_HUB */
  64                 0,              /* bDeviceSubClass: UDSUBCLASS_HUB */
  65                 1,              /* bDeviceProtocol: UDPROTO_HSHUBSTT */
  66                 64,             /* bMaxPacketSize: 64 bytes */
  67                 0x0000,         /* idVendor */
  68                 0x0000,         /* idProduct */
  69                 cpu_to_le16(0x0100), /* bcdDevice */
  70                 1,              /* iManufacturer */
  71                 2,              /* iProduct */
  72                 0,              /* iSerialNumber */
  73                 1               /* bNumConfigurations: 1 */
  74         },
  75         {
  76                 0x9,
  77                 2,              /* bDescriptorType: UDESC_CONFIG */
  78                 cpu_to_le16(0x19),
  79                 1,              /* bNumInterface */
  80                 1,              /* bConfigurationValue */
  81                 0,              /* iConfiguration */
  82                 0x40,           /* bmAttributes: UC_SELF_POWER */
  83                 0               /* bMaxPower */
  84         },
  85         {
  86                 0x9,            /* bLength */
  87                 4,              /* bDescriptorType: UDESC_INTERFACE */
  88                 0,              /* bInterfaceNumber */
  89                 0,              /* bAlternateSetting */
  90                 1,              /* bNumEndpoints */
  91                 9,              /* bInterfaceClass: UICLASS_HUB */
  92                 0,              /* bInterfaceSubClass: UISUBCLASS_HUB */
  93                 0,              /* bInterfaceProtocol: UIPROTO_HSHUBSTT */
  94                 0               /* iInterface */
  95         },
  96         {
  97                 0x7,            /* bLength */
  98                 5,              /* bDescriptorType: UDESC_ENDPOINT */
  99                 0x81,           /* bEndpointAddress:
 100                                  * UE_DIR_IN | EHCI_INTR_ENDPT
 101                                  */
 102                 3,              /* bmAttributes: UE_INTERRUPT */
 103                 8,              /* wMaxPacketSize */
 104                 255             /* bInterval */
 105         },
 106 };
 107
 108 #if defined(CONFIG_EHCI_IS_TDI)
 109 #define ehci_is_TDI()   (1)
 110 #else
 111 #define ehci_is_TDI()   (0)
 112 #endif
 113
 114 void __ehci_powerup_fixup(uint32_t *status_reg, uint32_t *reg)
 115 {
 116         mdelay(50);
 117 }
 118
 119 void ehci_powerup_fixup(uint32_t *status_reg, uint32_t *reg)
 120         __attribute__((weak, alias("__ehci_powerup_fixup")));
 121
 122 static int handshake(uint32_t *ptr, uint32_t mask, uint32_t done, int usec)
 123 {
 124         uint32_t result;
 125         do {
 126                 result = ehci_readl(ptr);
 127                 udelay(5);
 128                 if (result == ~(uint32_t)0)
 129                         return -1;
 130                 result &= mask;
 131                 if (result == done)
 132                         return 0;
 133                 usec--;
 134         } while (usec > 0);
 135         return -1;
 136 }
 137
 138 static int ehci_reset(void)
 139 {
 140         uint32_t cmd;
 141         uint32_t tmp;
 142         uint32_t *reg_ptr;
 143         int ret = 0;
 144
 145         cmd = ehci_readl(&hcor->or_usbcmd);
 146         cmd = (cmd & ~CMD_RUN) | CMD_RESET;
 147         ehci_writel(&hcor->or_usbcmd, cmd);
 148         ret = handshake((uint32_t *)&hcor->or_usbcmd, CMD_RESET, 0, 250 * 1000);
 149         if (ret < 0) {
 150                 printf("EHCI fail to reset\n");
 151                 goto out;
 152         }
 153
 154         if (ehci_is_TDI()) {
 155                 reg_ptr = (uint32_t *)((u8 *)hcor + USBMODE);
 156                 tmp = ehci_readl(reg_ptr);
 157                 tmp |= USBMODE_CM_HC;
 158 #if defined(CONFIG_EHCI_MMIO_BIG_ENDIAN)
 159                 tmp |= USBMODE_BE;
 160 #endif
 161                 ehci_writel(reg_ptr, tmp);
 162         }
 163
 164 #ifdef CONFIG_USB_EHCI_TXFIFO_THRESH
 165         cmd = ehci_readl(&hcor->or_txfilltuning);
 166         cmd &= ~TXFIFO_THRESH_MASK;
 167         cmd |= TXFIFO_THRESH(CONFIG_USB_EHCI_TXFIFO_THRESH);
 168         ehci_writel(&hcor->or_txfilltuning, cmd);
 169 #endif
 170 out:
 171         return ret;
 172 }
 173
 174 static int ehci_td_buffer(struct qTD *td, void *buf, size_t sz)
 175 {
 176         uint32_t delta, next;
 177         uint32_t addr = (uint32_t)buf;
 178         int idx;
 179
 180         if (addr != ALIGN(addr, ARCH_DMA_MINALIGN))
 181                 debug("EHCI-HCD: Misaligned buffer address (%p)\n", buf);
 182
 183         flush_dcache_range(addr, ALIGN(addr + sz, ARCH_DMA_MINALIGN));
 184
 185         idx = 0;
 186         while (idx < QT_BUFFER_CNT) {
 187                 td->qt_buffer[idx] = cpu_to_hc32(addr);
 188                 td->qt_buffer_hi[idx] = 0;
 189                 next = (addr + EHCI_PAGE_SIZE) & ~(EHCI_PAGE_SIZE - 1);
 190                 delta = next - addr;
 191                 if (delta >= sz)
 192                         break;
 193                 sz -= delta;
 194                 addr = next;
 195                 idx++;
 196         }
 197
 198         if (idx == QT_BUFFER_CNT) {
 199                 printf("out of buffer pointers (%u bytes left)\n", sz);
 200                 return -1;
 201         }
 202
 203         return 0;
 204 }
 205
 206 static int
 207 ehci_submit_async(struct usb_device *dev, unsigned long pipe, void *buffer,
 208                    int length, struct devrequest *req)
 209 {
 210         ALLOC_ALIGN_BUFFER(struct QH, qh, 1, USB_DMA_MINALIGN);
 211 #define QTD_COUNT       3
 212         ALLOC_ALIGN_BUFFER(struct qTD, qtd, QTD_COUNT, USB_DMA_MINALIGN);
 213         int qtd_counter = 0;
 214
 215         volatile struct qTD *vtd;
 216         unsigned long ts;
 217         uint32_t *tdp;
 218         uint32_t endpt, token, usbsts;
 219         uint32_t c, toggle;
 220         uint32_t cmd;
 221         int timeout;
 222         int ret = 0;
 223
 224         debug("dev=%p, pipe=%lx, buffer=%p, length=%d, req=%p\n", dev, pipe,
 225               buffer, length, req);
 226         if (req != NULL)
 227                 debug("req=%u (%#x), type=%u (%#x), value=%u (%#x), index=%u\n",
 228                       req->request, req->request,
 229                       req->requesttype, req->requesttype,
 230                       le16_to_cpu(req->value), le16_to_cpu(req->value),
 231                       le16_to_cpu(req->index));
 232
 233         memset(qh, 0, sizeof(struct QH));
 234         memset(qtd, 0, QTD_COUNT * sizeof(*qtd));
 235
 236         toggle = usb_gettoggle(dev, usb_pipeendpoint(pipe), usb_pipeout(pipe));
 237
 238         /*
 239          * Setup QH (3.6 in ehci-r10.pdf)
 240          *
 241          *   qh_link ................. 03-00 H
 242          *   qh_endpt1 ............... 07-04 H
 243          *   qh_endpt2 ............... 0B-08 H
 244          * - qh_curtd
 245          *   qh_overlay.qt_next ...... 13-10 H
 246          * - qh_overlay.qt_altnext
 247          */
 248         qh->qh_link = cpu_to_hc32((uint32_t)qh_list | QH_LINK_TYPE_QH);
 249         c = usb_pipespeed(pipe) != USB_SPEED_HIGH && !usb_pipeendpoint(pipe);
 250         endpt = QH_ENDPT1_RL(8) | QH_ENDPT1_C(c) |
 251                 QH_ENDPT1_MAXPKTLEN(usb_maxpacket(dev, pipe)) | QH_ENDPT1_H(0) |
 252                 QH_ENDPT1_DTC(QH_ENDPT1_DTC_DT_FROM_QTD) |
 253                 QH_ENDPT1_EPS(usb_pipespeed(pipe)) |
 254                 QH_ENDPT1_ENDPT(usb_pipeendpoint(pipe)) | QH_ENDPT1_I(0) |
 255                 QH_ENDPT1_DEVADDR(usb_pipedevice(pipe));
 256         qh->qh_endpt1 = cpu_to_hc32(endpt);
 257         endpt = QH_ENDPT2_MULT(1) | QH_ENDPT2_PORTNUM(dev->portnr) |
 258                 QH_ENDPT2_HUBADDR(dev->parent->devnum) |
 259                 QH_ENDPT2_UFCMASK(0) | QH_ENDPT2_UFSMASK(0);
 260         qh->qh_endpt2 = cpu_to_hc32(endpt);
 261         qh->qh_overlay.qt_next = cpu_to_hc32(QT_NEXT_TERMINATE);
 262
 263         tdp = &qh->qh_overlay.qt_next;
 264
 265         if (req != NULL) {
 266                 /*
 267                  * Setup request qTD (3.5 in ehci-r10.pdf)
 268                  *
 269                  *   qt_next ................ 03-00 H
 270                  *   qt_altnext ............. 07-04 H
 271                  *   qt_token ............... 0B-08 H
 272                  *
 273                  *   [ buffer, buffer_hi ] loaded with "req".
 274                  */
 275                 qtd[qtd_counter].qt_next = cpu_to_hc32(QT_NEXT_TERMINATE);
 276                 qtd[qtd_counter].qt_altnext = cpu_to_hc32(QT_NEXT_TERMINATE);
 277                 token = QT_TOKEN_DT(0) | QT_TOKEN_TOTALBYTES(sizeof(*req)) |
 278                         QT_TOKEN_IOC(0) | QT_TOKEN_CPAGE(0) | QT_TOKEN_CERR(3) |
 279                         QT_TOKEN_PID(QT_TOKEN_PID_SETUP) |
 280                         QT_TOKEN_STATUS(QT_TOKEN_STATUS_ACTIVE);
 281                 qtd[qtd_counter].qt_token = cpu_to_hc32(token);
 282                 if (ehci_td_buffer(&qtd[qtd_counter], req, sizeof(*req))) {
 283                         printf("unable to construct SETUP TD\n");
 284                         goto fail;
 285                 }
 286                 /* Update previous qTD! */
 287                 *tdp = cpu_to_hc32((uint32_t)&qtd[qtd_counter]);
 288                 tdp = &qtd[qtd_counter++].qt_next;
 289                 toggle = 1;
 290         }
 291
 292         if (length > 0 || req == NULL) {
 293                 /*
 294                  * Setup request qTD (3.5 in ehci-r10.pdf)
 295                  *
 296                  *   qt_next ................ 03-00 H
 297                  *   qt_altnext ............. 07-04 H
 298                  *   qt_token ............... 0B-08 H
 299                  *
 300                  *   [ buffer, buffer_hi ] loaded with "buffer".
 301                  */
 302                 qtd[qtd_counter].qt_next = cpu_to_hc32(QT_NEXT_TERMINATE);
 303                 qtd[qtd_counter].qt_altnext = cpu_to_hc32(QT_NEXT_TERMINATE);
 304                 token = QT_TOKEN_DT(toggle) | QT_TOKEN_TOTALBYTES(length) |
 305                         QT_TOKEN_IOC(req == NULL) | QT_TOKEN_CPAGE(0) |
 306                         QT_TOKEN_CERR(3) | QT_TOKEN_PID(usb_pipein(pipe) ?
 307                                 QT_TOKEN_PID_IN : QT_TOKEN_PID_OUT) |
 308                         QT_TOKEN_STATUS(QT_TOKEN_STATUS_ACTIVE);
 309                 qtd[qtd_counter].qt_token = cpu_to_hc32(token);
 310                 if (ehci_td_buffer(&qtd[qtd_counter], buffer, length)) {
 311                         printf("unable to construct DATA TD\n");
 312                         goto fail;
 313                 }
 314                 /* Update previous qTD! */
 315                 *tdp = cpu_to_hc32((uint32_t)&qtd[qtd_counter]);
 316                 tdp = &qtd[qtd_counter++].qt_next;
 317         }
 318
 319         if (req != NULL) {
 320                 /*
 321                  * Setup request qTD (3.5 in ehci-r10.pdf)
 322                  *
 323                  *   qt_next ................ 03-00 H
 324                  *   qt_altnext ............. 07-04 H
 325                  *   qt_token ............... 0B-08 H
 326                  */
 327                 qtd[qtd_counter].qt_next = cpu_to_hc32(QT_NEXT_TERMINATE);
 328                 qtd[qtd_counter].qt_altnext = cpu_to_hc32(QT_NEXT_TERMINATE);
 329                 token = QT_TOKEN_DT(toggle) | QT_TOKEN_TOTALBYTES(0) |
 330                         QT_TOKEN_IOC(1) | QT_TOKEN_CPAGE(0) | QT_TOKEN_CERR(3) |
 331                         QT_TOKEN_PID(usb_pipein(pipe) ?
 332                                 QT_TOKEN_PID_OUT : QT_TOKEN_PID_IN) |
 333                         QT_TOKEN_STATUS(QT_TOKEN_STATUS_ACTIVE);
 334                 qtd[qtd_counter].qt_token = cpu_to_hc32(token);
 335                 /* Update previous qTD! */
 336                 *tdp = cpu_to_hc32((uint32_t)&qtd[qtd_counter]);
 337                 tdp = &qtd[qtd_counter++].qt_next;
 338         }
 339
 340         qh_list->qh_link = cpu_to_hc32((uint32_t)qh | QH_LINK_TYPE_QH);
 341
 342         /* Flush dcache */
 343         flush_dcache_range((uint32_t)qh_list,
 344                 ALIGN_END_ADDR(struct QH, qh_list, 1));
 345         flush_dcache_range((uint32_t)qh, ALIGN_END_ADDR(struct QH, qh, 1));
 346         flush_dcache_range((uint32_t)qtd,
 347                            ALIGN_END_ADDR(struct qTD, qtd, QTD_COUNT));
 348
 349         /* Set async. queue head pointer. */
 350         ehci_writel(&hcor->or_asynclistaddr, (uint32_t)qh_list);
 351
 352         usbsts = ehci_readl(&hcor->or_usbsts);
 353         ehci_writel(&hcor->or_usbsts, (usbsts & 0x3f));
 354
 355         /* Enable async. schedule. */
 356         cmd = ehci_readl(&hcor->or_usbcmd);
 357         cmd |= CMD_ASE;
 358         ehci_writel(&hcor->or_usbcmd, cmd);
 359
 360         ret = handshake((uint32_t *)&hcor->or_usbsts, STS_ASS, STS_ASS,
 361                         100 * 1000);
 362         if (ret < 0) {
 363                 printf("EHCI fail timeout STS_ASS set\n");
 364                 goto fail;
 365         }
 366
 367         /* Wait for TDs to be processed. */
 368         ts = get_timer(0);
 369         vtd = &qtd[qtd_counter - 1];
 370         timeout = USB_TIMEOUT_MS(pipe);
 371         do {
 372                 /* Invalidate dcache */
 373                 invalidate_dcache_range((uint32_t)qh_list,
 374                         ALIGN_END_ADDR(struct QH, qh_list, 1));
 375                 invalidate_dcache_range((uint32_t)qh,
 376                         ALIGN_END_ADDR(struct QH, qh, 1));
 377                 invalidate_dcache_range((uint32_t)qtd,
 378                         ALIGN_END_ADDR(struct qTD, qtd, QTD_COUNT));
 379
 380                 token = hc32_to_cpu(vtd->qt_token);
 381                 if (!(QT_TOKEN_GET_STATUS(token) & QT_TOKEN_STATUS_ACTIVE))
 382                         break;
 383                 WATCHDOG_RESET();
 384         } while (get_timer(ts) < timeout);
 385
 386         /*
 387          * Invalidate the memory area occupied by buffer
 388          * Don't try to fix the buffer alignment, if it isn't properly
 389          * aligned it's upper layer's fault so let invalidate_dcache_range()
 390          * vow about it. But we have to fix the length as it's actual
 391          * transfer length and can be unaligned. This is potentially
 392          * dangerous operation, it's responsibility of the calling
 393          * code to make sure enough space is reserved.
 394          */
 395         invalidate_dcache_range((uint32_t)buffer,
 396                 ALIGN((uint32_t)buffer + length, ARCH_DMA_MINALIGN));
 397
 398         /* Check that the TD processing happened */
 399         if (QT_TOKEN_GET_STATUS(token) & QT_TOKEN_STATUS_ACTIVE)
 400                 printf("EHCI timed out on TD - token=%#x\n", token);
 401
 402         /* Disable async schedule. */
 403         cmd = ehci_readl(&hcor->or_usbcmd);
 404         cmd &= ~CMD_ASE;
 405         ehci_writel(&hcor->or_usbcmd, cmd);
 406
 407         ret = handshake((uint32_t *)&hcor->or_usbsts, STS_ASS, 0,
 408                         100 * 1000);
 409         if (ret < 0) {
 410                 printf("EHCI fail timeout STS_ASS reset\n");
 411                 goto fail;
 412         }
 413
 414         token = hc32_to_cpu(qh->qh_overlay.qt_token);
 415         if (!(QT_TOKEN_GET_STATUS(token) & QT_TOKEN_STATUS_ACTIVE)) {
 416                 debug("TOKEN=%#x\n", token);
 417                 switch (QT_TOKEN_GET_STATUS(token) &
 418                         ~(QT_TOKEN_STATUS_SPLITXSTATE | QT_TOKEN_STATUS_PERR)) {
 419                 case 0:
 420                         toggle = QT_TOKEN_GET_DT(token);
 421                         usb_settoggle(dev, usb_pipeendpoint(pipe),
 422                                        usb_pipeout(pipe), toggle);
 423                         dev->status = 0;
 424                         break;
 425                 case QT_TOKEN_STATUS_HALTED:
 426                         dev->status = USB_ST_STALLED;
 427                         break;
 428                 case QT_TOKEN_STATUS_ACTIVE | QT_TOKEN_STATUS_DATBUFERR:
 429                 case QT_TOKEN_STATUS_DATBUFERR:
 430                         dev->status = USB_ST_BUF_ERR;
 431                         break;
 432                 case QT_TOKEN_STATUS_HALTED | QT_TOKEN_STATUS_BABBLEDET:
 433                 case QT_TOKEN_STATUS_BABBLEDET:
 434                         dev->status = USB_ST_BABBLE_DET;
 435                         break;
 436                 default:
 437                         dev->status = USB_ST_CRC_ERR;
 438                         if (QT_TOKEN_GET_STATUS(token) & QT_TOKEN_STATUS_HALTED)
 439                                 dev->status |= USB_ST_STALLED;
 440                         break;
 441                 }
 442                 dev->act_len = length - QT_TOKEN_GET_TOTALBYTES(token);
 443         } else {
 444                 dev->act_len = 0;
 445                 debug("dev=%u, usbsts=%#x, p[1]=%#x, p[2]=%#x\n",
 446                       dev->devnum, ehci_readl(&hcor->or_usbsts),
 447                       ehci_readl(&hcor->or_portsc[0]),
 448                       ehci_readl(&hcor->or_portsc[1]));
 449         }
 450
 451         return (dev->status != USB_ST_NOT_PROC) ? 0 : -1;
 452
 453 fail:
 454         return -1;
 455 }
 456
 457 static inline int min3(int a, int b, int c)
 458 {
 459
 460         if (b < a)
 461                 a = b;
 462         if (c < a)
 463                 a = c;
 464         return a;
 465 }
 466
 467 int
 468 ehci_submit_root(struct usb_device *dev, unsigned long pipe, void *buffer,
 469                  int length, struct devrequest *req)
 470 {
 471         uint8_t tmpbuf[4];
 472         u16 typeReq;
 473         void *srcptr = NULL;
 474         int len, srclen;
 475         uint32_t reg;
 476         uint32_t *status_reg;
 477
 478         if (le16_to_cpu(req->index) > CONFIG_SYS_USB_EHCI_MAX_ROOT_PORTS) {
 479                 printf("The request port(%d) is not configured\n",
 480                         le16_to_cpu(req->index) - 1);
 481                 return -1;
 482         }
 483         status_reg = (uint32_t *)&hcor->or_portsc[
 484                                                 le16_to_cpu(req->index) - 1];
 485         srclen = 0;
 486
 487         debug("req=%u (%#x), type=%u (%#x), value=%u, index=%u\n",
 488               req->request, req->request,
 489               req->requesttype, req->requesttype,
 490               le16_to_cpu(req->value), le16_to_cpu(req->index));
 491
 492         typeReq = req->request | req->requesttype << 8;
 493
 494         switch (typeReq) {
 495         case DeviceRequest | USB_REQ_GET_DESCRIPTOR:
 496                 switch (le16_to_cpu(req->value) >> 8) {
 497                 case USB_DT_DEVICE:
 498                         debug("USB_DT_DEVICE request\n");
 499                         srcptr = &descriptor.device;
 500                         srclen = descriptor.device.bLength;
 501                         break;
 502                 case USB_DT_CONFIG:
 503                         debug("USB_DT_CONFIG config\n");
 504                         srcptr = &descriptor.config;
 505                         srclen = descriptor.config.bLength +
 506                                         descriptor.interface.bLength +
 507                                         descriptor.endpoint.bLength;
 508                         break;
 509                 case USB_DT_STRING:
 510                         debug("USB_DT_STRING config\n");
 511                         switch (le16_to_cpu(req->value) & 0xff) {
 512                         case 0: /* Language */
 513                                 srcptr = "\4\3\1\0";
 514                                 srclen = 4;
 515                                 break;
 516                         case 1: /* Vendor */
 517                                 srcptr = "\16\3u\0-\0b\0o\0o\0t\0";
 518                                 srclen = 14;
 519                                 break;
 520                         case 2: /* Product */
 521                                 srcptr = "\52\3E\0H\0C\0I\0 "
 522                                          "\0H\0o\0s\0t\0 "
 523                                          "\0C\0o\0n\0t\0r\0o\0l\0l\0e\0r\0";
 524                                 srclen = 42;
 525                                 break;
 526                         default:
 527                                 debug("unknown value DT_STRING %x\n",
 528                                         le16_to_cpu(req->value));
 529                                 goto unknown;
 530                         }
 531                         break;
 532                 default:
 533                         debug("unknown value %x\n", le16_to_cpu(req->value));
 534                         goto unknown;
 535                 }
 536                 break;
 537         case USB_REQ_GET_DESCRIPTOR | ((USB_DIR_IN | USB_RT_HUB) << 8):
 538                 switch (le16_to_cpu(req->value) >> 8) {
 539                 case USB_DT_HUB:
 540                         debug("USB_DT_HUB config\n");
 541                         srcptr = &descriptor.hub;
 542                         srclen = descriptor.hub.bLength;
 543                         break;
 544                 default:
 545                         debug("unknown value %x\n", le16_to_cpu(req->value));
 546                         goto unknown;
 547                 }
 548                 break;
 549         case USB_REQ_SET_ADDRESS | (USB_RECIP_DEVICE << 8):
 550                 debug("USB_REQ_SET_ADDRESS\n");
 551                 rootdev = le16_to_cpu(req->value);
 552                 break;
 553         case DeviceOutRequest | USB_REQ_SET_CONFIGURATION:
 554                 debug("USB_REQ_SET_CONFIGURATION\n");
 555                 /* Nothing to do */
 556                 break;
 557         case USB_REQ_GET_STATUS | ((USB_DIR_IN | USB_RT_HUB) << 8):
 558                 tmpbuf[0] = 1;  /* USB_STATUS_SELFPOWERED */
 559                 tmpbuf[1] = 0;
 560                 srcptr = tmpbuf;
 561                 srclen = 2;
 562                 break;
 563         case USB_REQ_GET_STATUS | ((USB_RT_PORT | USB_DIR_IN) << 8):
 564                 memset(tmpbuf, 0, 4);
 565                 reg = ehci_readl(status_reg);
 566                 if (reg & EHCI_PS_CS)
 567                         tmpbuf[0] |= USB_PORT_STAT_CONNECTION;
 568                 if (reg & EHCI_PS_PE)
 569                         tmpbuf[0] |= USB_PORT_STAT_ENABLE;
 570                 if (reg & EHCI_PS_SUSP)
 571                         tmpbuf[0] |= USB_PORT_STAT_SUSPEND;
 572                 if (reg & EHCI_PS_OCA)
 573                         tmpbuf[0] |= USB_PORT_STAT_OVERCURRENT;
 574                 if (reg & EHCI_PS_PR)
 575                         tmpbuf[0] |= USB_PORT_STAT_RESET;
 576                 if (reg & EHCI_PS_PP)
 577                         tmpbuf[1] |= USB_PORT_STAT_POWER >> 8;
 578
 579                 if (ehci_is_TDI()) {
 580                         switch (PORTSC_PSPD(reg)) {
 581                         case PORTSC_PSPD_FS:
 582                                 break;
 583                         case PORTSC_PSPD_LS:
 584                                 tmpbuf[1] |= USB_PORT_STAT_LOW_SPEED >> 8;
 585                                 break;
 586                         case PORTSC_PSPD_HS:
 587                         default:
 588                                 tmpbuf[1] |= USB_PORT_STAT_HIGH_SPEED >> 8;
 589                                 break;
 590                         }
 591                 } else {
 592                         tmpbuf[1] |= USB_PORT_STAT_HIGH_SPEED >> 8;
 593                 }
 594
 595                 if (reg & EHCI_PS_CSC)
 596                         tmpbuf[2] |= USB_PORT_STAT_C_CONNECTION;
 597                 if (reg & EHCI_PS_PEC)
 598                         tmpbuf[2] |= USB_PORT_STAT_C_ENABLE;
 599                 if (reg & EHCI_PS_OCC)
 600                         tmpbuf[2] |= USB_PORT_STAT_C_OVERCURRENT;
 601                 if (portreset & (1 << le16_to_cpu(req->index)))
 602                         tmpbuf[2] |= USB_PORT_STAT_C_RESET;
 603
 604                 srcptr = tmpbuf;
 605                 srclen = 4;
 606                 break;
 607         case USB_REQ_SET_FEATURE | ((USB_DIR_OUT | USB_RT_PORT) << 8):
 608                 reg = ehci_readl(status_reg);
 609                 reg &= ~EHCI_PS_CLEAR;
 610                 switch (le16_to_cpu(req->value)) {
 611                 case USB_PORT_FEAT_ENABLE:
 612                         reg |= EHCI_PS_PE;
 613                         ehci_writel(status_reg, reg);
 614                         break;
 615                 case USB_PORT_FEAT_POWER:
 616                         if (HCS_PPC(ehci_readl(&hccr->cr_hcsparams))) {
 617                                 reg |= EHCI_PS_PP;
 618                                 ehci_writel(status_reg, reg);
 619                         }
 620                         break;
 621                 case USB_PORT_FEAT_RESET:
 622                         if ((reg & (EHCI_PS_PE | EHCI_PS_CS)) == EHCI_PS_CS &&
 623                             !ehci_is_TDI() &&
 624                             EHCI_PS_IS_LOWSPEED(reg)) {
 625                                 /* Low speed device, give up ownership. */
 626                                 debug("port %d low speed --> companion\n",
 627                                       req->index - 1);
 628                                 reg |= EHCI_PS_PO;
 629                                 ehci_writel(status_reg, reg);
 630                                 break;
 631                         } else {
 632                                 int ret;
 633
 634                                 reg |= EHCI_PS_PR;
 635                                 reg &= ~EHCI_PS_PE;
 636                                 ehci_writel(status_reg, reg);
 637                                 /*
 638                                  * caller must wait, then call GetPortStatus
 639                                  * usb 2.0 specification say 50 ms resets on
 640                                  * root
 641                                  */
 642                                 ehci_powerup_fixup(status_reg, &reg);
 643
 644                                 ehci_writel(status_reg, reg & ~EHCI_PS_PR);
 645                                 /*
 646                                  * A host controller must terminate the reset
 647                                  * and stabilize the state of the port within
 648                                  * 2 milliseconds
 649                                  */
 650                                 ret = handshake(status_reg, EHCI_PS_PR, 0,
 651                                                 2 * 1000);
 652                                 if (!ret)
 653                                         portreset |=
 654                                                 1 << le16_to_cpu(req->index);
 655                                 else
 656                                         printf("port(%d) reset error\n",
 657                                         le16_to_cpu(req->index) - 1);
 658                         }
 659                         break;
 660                 default:
 661                         debug("unknown feature %x\n", le16_to_cpu(req->value));
 662                         goto unknown;
 663                 }
 664                 /* unblock posted writes */
 665                 (void) ehci_readl(&hcor->or_usbcmd);
 666                 break;
 667         case USB_REQ_CLEAR_FEATURE | ((USB_DIR_OUT | USB_RT_PORT) << 8):
 668                 reg = ehci_readl(status_reg);
 669                 switch (le16_to_cpu(req->value)) {
 670                 case USB_PORT_FEAT_ENABLE:
 671                         reg &= ~EHCI_PS_PE;
 672                         break;
 673                 case USB_PORT_FEAT_C_ENABLE:
 674                         reg = (reg & ~EHCI_PS_CLEAR) | EHCI_PS_PE;
 675                         break;
 676                 case USB_PORT_FEAT_POWER:
 677                         if (HCS_PPC(ehci_readl(&hccr->cr_hcsparams)))
 678                                 reg = reg & ~(EHCI_PS_CLEAR | EHCI_PS_PP);
 679                 case USB_PORT_FEAT_C_CONNECTION:
 680                         reg = (reg & ~EHCI_PS_CLEAR) | EHCI_PS_CSC;
 681                         break;
 682                 case USB_PORT_FEAT_OVER_CURRENT:
 683                         reg = (reg & ~EHCI_PS_CLEAR) | EHCI_PS_OCC;
 684                         break;
 685                 case USB_PORT_FEAT_C_RESET:
 686                         portreset &= ~(1 << le16_to_cpu(req->index));
 687                         break;
 688                 default:
 689                         debug("unknown feature %x\n", le16_to_cpu(req->value));
 690                         goto unknown;
 691                 }
 692                 ehci_writel(status_reg, reg);
 693                 /* unblock posted write */
 694                 (void) ehci_readl(&hcor->or_usbcmd);
 695                 break;
 696         default:
 697                 debug("Unknown request\n");
 698                 goto unknown;
 699         }
 700
 701         mdelay(1);
 702         len = min3(srclen, le16_to_cpu(req->length), length);
 703         if (srcptr != NULL && len > 0)
 704                 memcpy(buffer, srcptr, len);
 705         else
 706                 debug("Len is 0\n");
 707
 708         dev->act_len = len;
 709         dev->status = 0;
 710         return 0;
 711
 712 unknown:
 713         debug("requesttype=%x, request=%x, value=%x, index=%x, length=%x\n",
 714               req->requesttype, req->request, le16_to_cpu(req->value),
 715               le16_to_cpu(req->index), le16_to_cpu(req->length));
 716
 717         dev->act_len = 0;
 718         dev->status = USB_ST_STALLED;
 719         return -1;
 720 }
 721
 722 int usb_lowlevel_stop(void)
 723 {
 724         return ehci_hcd_stop();
 725 }
 726
 727 int usb_lowlevel_init(void)
 728 {
 729         uint32_t reg;
 730         uint32_t cmd;
 731
 732         if (ehci_hcd_init())
 733                 return -1;
 734
 735         /* EHCI spec section 4.1 */
 736         if (ehci_reset())
 737                 return -1;
 738
 739 #if defined(CONFIG_EHCI_HCD_INIT_AFTER_RESET)
 740         if (ehci_hcd_init())
 741                 return -1;
 742 #endif
 743
 744         /* Set head of reclaim list */
 745         memset(qh_list, 0, sizeof(*qh_list));
 746         qh_list->qh_link = cpu_to_hc32((uint32_t)qh_list | QH_LINK_TYPE_QH);
 747         qh_list->qh_endpt1 = cpu_to_hc32(QH_ENDPT1_H(1) |
 748                                                 QH_ENDPT1_EPS(USB_SPEED_HIGH));
 749         qh_list->qh_curtd = cpu_to_hc32(QT_NEXT_TERMINATE);
 750         qh_list->qh_overlay.qt_next = cpu_to_hc32(QT_NEXT_TERMINATE);
 751         qh_list->qh_overlay.qt_altnext = cpu_to_hc32(QT_NEXT_TERMINATE);
 752         qh_list->qh_overlay.qt_token =
 753                         cpu_to_hc32(QT_TOKEN_STATUS(QT_TOKEN_STATUS_HALTED));
 754
 755         reg = ehci_readl(&hccr->cr_hcsparams);
 756         descriptor.hub.bNbrPorts = HCS_N_PORTS(reg);
 757         printf("Register %x NbrPorts %d\n", reg, descriptor.hub.bNbrPorts);
 758         /* Port Indicators */
 759         if (HCS_INDICATOR(reg))
 760                 descriptor.hub.wHubCharacteristics |= 0x80;
 761         /* Port Power Control */
 762         if (HCS_PPC(reg))
 763                 descriptor.hub.wHubCharacteristics |= 0x01;
 764
 765         /* Start the host controller. */
 766         cmd = ehci_readl(&hcor->or_usbcmd);
 767         /*
 768          * Philips, Intel, and maybe others need CMD_RUN before the
 769          * root hub will detect new devices (why?); NEC doesn't
 770          */
 771         cmd &= ~(CMD_LRESET|CMD_IAAD|CMD_PSE|CMD_ASE|CMD_RESET);
 772         cmd |= CMD_RUN;
 773         ehci_writel(&hcor->or_usbcmd, cmd);
 774
 775         /* take control over the ports */
 776         cmd = ehci_readl(&hcor->or_configflag);
 777         cmd |= FLAG_CF;
 778         ehci_writel(&hcor->or_configflag, cmd);
 779         /* unblock posted write */
 780         cmd = ehci_readl(&hcor->or_usbcmd);
 781         mdelay(5);
 782         reg = HC_VERSION(ehci_readl(&hccr->cr_capbase));
 783         printf("USB EHCI %x.%02x\n", reg >> 8, reg & 0xff);
 784
 785         rootdev = 0;
 786
 787         return 0;
 788 }
 789
 790 int
 791 submit_bulk_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
 792                 int length)
 793 {
 794
 795         if (usb_pipetype(pipe) != PIPE_BULK) {
 796                 debug("non-bulk pipe (type=%lu)", usb_pipetype(pipe));
 797                 return -1;
 798         }
 799         return ehci_submit_async(dev, pipe, buffer, length, NULL);
 800 }
 801
 802 int
 803 submit_control_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
 804                    int length, struct devrequest *setup)
 805 {
 806
 807         if (usb_pipetype(pipe) != PIPE_CONTROL) {
 808                 debug("non-control pipe (type=%lu)", usb_pipetype(pipe));
 809                 return -1;
 810         }
 811
 812         if (usb_pipedevice(pipe) == rootdev) {
 813                 if (!rootdev)
 814                         dev->speed = USB_SPEED_HIGH;
 815                 return ehci_submit_root(dev, pipe, buffer, length, setup);
 816         }
 817         return ehci_submit_async(dev, pipe, buffer, length, setup);
 818 }
 819
 820 int
 821 submit_int_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
 822                int length, int interval)
 823 {
 824         debug("dev=%p, pipe=%lu, buffer=%p, length=%d, interval=%d",
 825               dev, pipe, buffer, length, interval);
 826
 827         /*
 828          * Interrupt transfers requiring several transactions are not supported
 829          * because bInterval is ignored.
 830          */
 831         if (length > usb_maxpacket(dev, pipe)) {
 832                 printf("%s: Interrupt transfers requiring several transactions "
 833                         "are not supported.\n", __func__);
 834                 return -1;
 835         }
 836         return ehci_submit_async(dev, pipe, buffer, length, NULL);
 837 }