git.sur5r.net Git - u-boot/blob - 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 static struct QH qh_list __attribute__((aligned(32)));
  38
  39 static struct descriptor {
  40         struct usb_hub_descriptor hub;
  41         struct usb_device_descriptor device;
  42         struct usb_linux_config_descriptor config;
  43         struct usb_linux_interface_descriptor interface;
  44         struct usb_endpoint_descriptor endpoint;
  45 }  __attribute__ ((packed)) descriptor = {
  46         {
  47                 0x8,            /* bDescLength */
  48                 0x29,           /* bDescriptorType: hub descriptor */
  49                 2,              /* bNrPorts -- runtime modified */
  50                 0,              /* wHubCharacteristics */
  51                 10,             /* bPwrOn2PwrGood */
  52                 0,              /* bHubCntrCurrent */
  53                 {},             /* Device removable */
  54                 {}              /* at most 7 ports! XXX */
  55         },
  56         {
  57                 0x12,           /* bLength */
  58                 1,              /* bDescriptorType: UDESC_DEVICE */
  59                 cpu_to_le16(0x0200), /* bcdUSB: v2.0 */
  60                 9,              /* bDeviceClass: UDCLASS_HUB */
  61                 0,              /* bDeviceSubClass: UDSUBCLASS_HUB */
  62                 1,              /* bDeviceProtocol: UDPROTO_HSHUBSTT */
  63                 64,             /* bMaxPacketSize: 64 bytes */
  64                 0x0000,         /* idVendor */
  65                 0x0000,         /* idProduct */
  66                 cpu_to_le16(0x0100), /* bcdDevice */
  67                 1,              /* iManufacturer */
  68                 2,              /* iProduct */
  69                 0,              /* iSerialNumber */
  70                 1               /* bNumConfigurations: 1 */
  71         },
  72         {
  73                 0x9,
  74                 2,              /* bDescriptorType: UDESC_CONFIG */
  75                 cpu_to_le16(0x19),
  76                 1,              /* bNumInterface */
  77                 1,              /* bConfigurationValue */
  78                 0,              /* iConfiguration */
  79                 0x40,           /* bmAttributes: UC_SELF_POWER */
  80                 0               /* bMaxPower */
  81         },
  82         {
  83                 0x9,            /* bLength */
  84                 4,              /* bDescriptorType: UDESC_INTERFACE */
  85                 0,              /* bInterfaceNumber */
  86                 0,              /* bAlternateSetting */
  87                 1,              /* bNumEndpoints */
  88                 9,              /* bInterfaceClass: UICLASS_HUB */
  89                 0,              /* bInterfaceSubClass: UISUBCLASS_HUB */
  90                 0,              /* bInterfaceProtocol: UIPROTO_HSHUBSTT */
  91                 0               /* iInterface */
  92         },
  93         {
  94                 0x7,            /* bLength */
  95                 5,              /* bDescriptorType: UDESC_ENDPOINT */
  96                 0x81,           /* bEndpointAddress:
  97                                  * UE_DIR_IN | EHCI_INTR_ENDPT
  98                                  */
  99                 3,              /* bmAttributes: UE_INTERRUPT */
 100                 8,              /* wMaxPacketSize */
 101                 255             /* bInterval */
 102         },
 103 };
 104
 105 #if defined(CONFIG_EHCI_IS_TDI)
 106 #define ehci_is_TDI()   (1)
 107 #else
 108 #define ehci_is_TDI()   (0)
 109 #endif
 110
 111 void __ehci_powerup_fixup(uint32_t *status_reg, uint32_t *reg)
 112 {
 113         mdelay(50);
 114 }
 115
 116 void ehci_powerup_fixup(uint32_t *status_reg, uint32_t *reg)
 117         __attribute__((weak, alias("__ehci_powerup_fixup")));
 118
 119 static int handshake(uint32_t *ptr, uint32_t mask, uint32_t done, int usec)
 120 {
 121         uint32_t result;
 122         do {
 123                 result = ehci_readl(ptr);
 124                 udelay(5);
 125                 if (result == ~(uint32_t)0)
 126                         return -1;
 127                 result &= mask;
 128                 if (result == done)
 129                         return 0;
 130                 usec--;
 131         } while (usec > 0);
 132         return -1;
 133 }
 134
 135 static int ehci_reset(void)
 136 {
 137         uint32_t cmd;
 138         uint32_t tmp;
 139         uint32_t *reg_ptr;
 140         int ret = 0;
 141
 142         cmd = ehci_readl(&hcor->or_usbcmd);
 143         cmd = (cmd & ~CMD_RUN) | CMD_RESET;
 144         ehci_writel(&hcor->or_usbcmd, cmd);
 145         ret = handshake((uint32_t *)&hcor->or_usbcmd, CMD_RESET, 0, 250 * 1000);
 146         if (ret < 0) {
 147                 printf("EHCI fail to reset\n");
 148                 goto out;
 149         }
 150
 151         if (ehci_is_TDI()) {
 152                 reg_ptr = (uint32_t *)((u8 *)hcor + USBMODE);
 153                 tmp = ehci_readl(reg_ptr);
 154                 tmp |= USBMODE_CM_HC;
 155 #if defined(CONFIG_EHCI_MMIO_BIG_ENDIAN)
 156                 tmp |= USBMODE_BE;
 157 #endif
 158                 ehci_writel(reg_ptr, tmp);
 159         }
 160
 161 #ifdef CONFIG_USB_EHCI_TXFIFO_THRESH
 162         cmd = ehci_readl(&hcor->or_txfilltuning);
 163         cmd &= ~TXFIFO_THRESH(0x3f);
 164         cmd |= TXFIFO_THRESH(CONFIG_USB_EHCI_TXFIFO_THRESH);
 165         ehci_writel(&hcor->or_txfilltuning, cmd);
 166 #endif
 167 out:
 168         return ret;
 169 }
 170
 171 static int ehci_td_buffer(struct qTD *td, void *buf, size_t sz)
 172 {
 173         uint32_t delta, next;
 174         uint32_t addr = (uint32_t)buf;
 175         size_t rsz = roundup(sz, 32);
 176         int idx;
 177
 178         if (sz != rsz)
 179                 debug("EHCI-HCD: Misaligned buffer size (%08x)\n", sz);
 180
 181         if (addr & 31)
 182                 debug("EHCI-HCD: Misaligned buffer address (%p)\n", buf);
 183
 184         idx = 0;
 185         while (idx < 5) {
 186                 flush_dcache_range(addr, addr + rsz);
 187                 td->qt_buffer[idx] = cpu_to_hc32(addr);
 188                 td->qt_buffer_hi[idx] = 0;
 189                 next = (addr + 4096) & ~4095;
 190                 delta = next - addr;
 191                 if (delta >= sz)
 192                         break;
 193                 sz -= delta;
 194                 addr = next;
 195                 idx++;
 196         }
 197
 198         if (idx == 5) {
 199                 debug("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         static struct QH qh __attribute__((aligned(32)));
 211         static struct qTD qtd[3] __attribute__((aligned (32)));
 212         int qtd_counter = 0;
 213
 214         volatile struct qTD *vtd;
 215         unsigned long ts;
 216         uint32_t *tdp;
 217         uint32_t endpt, token, usbsts;
 218         uint32_t c, toggle;
 219         uint32_t cmd;
 220         int timeout;
 221         int ret = 0;
 222
 223         debug("dev=%p, pipe=%lx, buffer=%p, length=%d, req=%p\n", dev, pipe,
 224               buffer, length, req);
 225         if (req != NULL)
 226                 debug("req=%u (%#x), type=%u (%#x), value=%u (%#x), index=%u\n",
 227                       req->request, req->request,
 228                       req->requesttype, req->requesttype,
 229                       le16_to_cpu(req->value), le16_to_cpu(req->value),
 230                       le16_to_cpu(req->index));
 231
 232         memset(&qh, 0, sizeof(struct QH));
 233         memset(qtd, 0, sizeof(qtd));
 234
 235         toggle = usb_gettoggle(dev, usb_pipeendpoint(pipe), usb_pipeout(pipe));
 236
 237         qh.qh_link = cpu_to_hc32((uint32_t)&qh_list | QH_LINK_TYPE_QH);
 238         c = (usb_pipespeed(pipe) != USB_SPEED_HIGH &&
 239              usb_pipeendpoint(pipe) == 0) ? 1 : 0;
 240         endpt = (8 << 28) |
 241             (c << 27) |
 242             (usb_maxpacket(dev, pipe) << 16) |
 243             (0 << 15) |
 244             (1 << 14) |
 245             (usb_pipespeed(pipe) << 12) |
 246             (usb_pipeendpoint(pipe) << 8) |
 247             (0 << 7) | (usb_pipedevice(pipe) << 0);
 248         qh.qh_endpt1 = cpu_to_hc32(endpt);
 249         endpt = (1 << 30) |
 250             (dev->portnr << 23) |
 251             (dev->parent->devnum << 16) | (0 << 8) | (0 << 0);
 252         qh.qh_endpt2 = cpu_to_hc32(endpt);
 253         qh.qh_overlay.qt_next = cpu_to_hc32(QT_NEXT_TERMINATE);
 254
 255         tdp = &qh.qh_overlay.qt_next;
 256
 257         if (req != NULL) {
 258                 qtd[qtd_counter].qt_next = cpu_to_hc32(QT_NEXT_TERMINATE);
 259                 qtd[qtd_counter].qt_altnext = cpu_to_hc32(QT_NEXT_TERMINATE);
 260                 token = (0 << 31) |
 261                     (sizeof(*req) << 16) |
 262                     (0 << 15) | (0 << 12) | (3 << 10) | (2 << 8) | (0x80 << 0);
 263                 qtd[qtd_counter].qt_token = cpu_to_hc32(token);
 264                 if (ehci_td_buffer(&qtd[qtd_counter], req, sizeof(*req)) != 0) {
 265                         debug("unable construct SETUP td\n");
 266                         goto fail;
 267                 }
 268                 *tdp = cpu_to_hc32((uint32_t)&qtd[qtd_counter]);
 269                 tdp = &qtd[qtd_counter++].qt_next;
 270                 toggle = 1;
 271         }
 272
 273         if (length > 0 || req == NULL) {
 274                 qtd[qtd_counter].qt_next = cpu_to_hc32(QT_NEXT_TERMINATE);
 275                 qtd[qtd_counter].qt_altnext = cpu_to_hc32(QT_NEXT_TERMINATE);
 276                 token = (toggle << 31) |
 277                     (length << 16) |
 278                     ((req == NULL ? 1 : 0) << 15) |
 279                     (0 << 12) |
 280                     (3 << 10) |
 281                     ((usb_pipein(pipe) ? 1 : 0) << 8) | (0x80 << 0);
 282                 qtd[qtd_counter].qt_token = cpu_to_hc32(token);
 283                 if (ehci_td_buffer(&qtd[qtd_counter], buffer, length) != 0) {
 284                         debug("unable construct DATA td\n");
 285                         goto fail;
 286                 }
 287                 *tdp = cpu_to_hc32((uint32_t)&qtd[qtd_counter]);
 288                 tdp = &qtd[qtd_counter++].qt_next;
 289         }
 290
 291         if (req != NULL) {
 292                 qtd[qtd_counter].qt_next = cpu_to_hc32(QT_NEXT_TERMINATE);
 293                 qtd[qtd_counter].qt_altnext = cpu_to_hc32(QT_NEXT_TERMINATE);
 294                 token = (toggle << 31) |
 295                     (0 << 16) |
 296                     (1 << 15) |
 297                     (0 << 12) |
 298                     (3 << 10) |
 299                     ((usb_pipein(pipe) ? 0 : 1) << 8) | (0x80 << 0);
 300                 qtd[qtd_counter].qt_token = cpu_to_hc32(token);
 301                 *tdp = cpu_to_hc32((uint32_t)&qtd[qtd_counter]);
 302                 tdp = &qtd[qtd_counter++].qt_next;
 303         }
 304
 305         qh_list.qh_link = cpu_to_hc32((uint32_t)&qh | QH_LINK_TYPE_QH);
 306
 307         /* Flush dcache */
 308         flush_dcache_range((uint32_t)&qh_list,
 309                 (uint32_t)&qh_list + sizeof(struct QH));
 310         flush_dcache_range((uint32_t)&qh, (uint32_t)&qh + sizeof(struct QH));
 311         flush_dcache_range((uint32_t)qtd, (uint32_t)qtd + sizeof(qtd));
 312
 313         usbsts = ehci_readl(&hcor->or_usbsts);
 314         ehci_writel(&hcor->or_usbsts, (usbsts & 0x3f));
 315
 316         /* Enable async. schedule. */
 317         cmd = ehci_readl(&hcor->or_usbcmd);
 318         cmd |= CMD_ASE;
 319         ehci_writel(&hcor->or_usbcmd, cmd);
 320
 321         ret = handshake((uint32_t *)&hcor->or_usbsts, STD_ASS, STD_ASS,
 322                         100 * 1000);
 323         if (ret < 0) {
 324                 printf("EHCI fail timeout STD_ASS set\n");
 325                 goto fail;
 326         }
 327
 328         /* Wait for TDs to be processed. */
 329         ts = get_timer(0);
 330         vtd = &qtd[qtd_counter - 1];
 331         timeout = USB_TIMEOUT_MS(pipe);
 332         do {
 333                 /* Invalidate dcache */
 334                 invalidate_dcache_range((uint32_t)&qh_list,
 335                         (uint32_t)&qh_list + sizeof(struct QH));
 336                 invalidate_dcache_range((uint32_t)&qh,
 337                         (uint32_t)&qh + sizeof(struct QH));
 338                 invalidate_dcache_range((uint32_t)qtd,
 339                         (uint32_t)qtd + sizeof(qtd));
 340
 341                 token = hc32_to_cpu(vtd->qt_token);
 342                 if (!(token & 0x80))
 343                         break;
 344                 WATCHDOG_RESET();
 345         } while (get_timer(ts) < timeout);
 346
 347         /* Invalidate the memory area occupied by buffer */
 348         invalidate_dcache_range(((uint32_t)buffer & ~31),
 349                 ((uint32_t)buffer & ~31) + roundup(length, 32));
 350
 351         /* Check that the TD processing happened */
 352         if (token & 0x80) {
 353                 printf("EHCI timed out on TD - token=%#x\n", token);
 354         }
 355
 356         /* Disable async schedule. */
 357         cmd = ehci_readl(&hcor->or_usbcmd);
 358         cmd &= ~CMD_ASE;
 359         ehci_writel(&hcor->or_usbcmd, cmd);
 360
 361         ret = handshake((uint32_t *)&hcor->or_usbsts, STD_ASS, 0,
 362                         100 * 1000);
 363         if (ret < 0) {
 364                 printf("EHCI fail timeout STD_ASS reset\n");
 365                 goto fail;
 366         }
 367
 368         qh_list.qh_link = cpu_to_hc32((uint32_t)&qh_list | QH_LINK_TYPE_QH);
 369
 370         token = hc32_to_cpu(qh.qh_overlay.qt_token);
 371         if (!(token & 0x80)) {
 372                 debug("TOKEN=%#x\n", token);
 373                 switch (token & 0xfc) {
 374                 case 0:
 375                         toggle = token >> 31;
 376                         usb_settoggle(dev, usb_pipeendpoint(pipe),
 377                                        usb_pipeout(pipe), toggle);
 378                         dev->status = 0;
 379                         break;
 380                 case 0x40:
 381                         dev->status = USB_ST_STALLED;
 382                         break;
 383                 case 0xa0:
 384                 case 0x20:
 385                         dev->status = USB_ST_BUF_ERR;
 386                         break;
 387                 case 0x50:
 388                 case 0x10:
 389                         dev->status = USB_ST_BABBLE_DET;
 390                         break;
 391                 default:
 392                         dev->status = USB_ST_CRC_ERR;
 393                         if ((token & 0x40) == 0x40)
 394                                 dev->status |= USB_ST_STALLED;
 395                         break;
 396                 }
 397                 dev->act_len = length - ((token >> 16) & 0x7fff);
 398         } else {
 399                 dev->act_len = 0;
 400                 debug("dev=%u, usbsts=%#x, p[1]=%#x, p[2]=%#x\n",
 401                       dev->devnum, ehci_readl(&hcor->or_usbsts),
 402                       ehci_readl(&hcor->or_portsc[0]),
 403                       ehci_readl(&hcor->or_portsc[1]));
 404         }
 405
 406         return (dev->status != USB_ST_NOT_PROC) ? 0 : -1;
 407
 408 fail:
 409         return -1;
 410 }
 411
 412 static inline int min3(int a, int b, int c)
 413 {
 414
 415         if (b < a)
 416                 a = b;
 417         if (c < a)
 418                 a = c;
 419         return a;
 420 }
 421
 422 int
 423 ehci_submit_root(struct usb_device *dev, unsigned long pipe, void *buffer,
 424                  int length, struct devrequest *req)
 425 {
 426         uint8_t tmpbuf[4];
 427         u16 typeReq;
 428         void *srcptr = NULL;
 429         int len, srclen;
 430         uint32_t reg;
 431         uint32_t *status_reg;
 432
 433         if (le16_to_cpu(req->index) > CONFIG_SYS_USB_EHCI_MAX_ROOT_PORTS) {
 434                 printf("The request port(%d) is not configured\n",
 435                         le16_to_cpu(req->index) - 1);
 436                 return -1;
 437         }
 438         status_reg = (uint32_t *)&hcor->or_portsc[
 439                                                 le16_to_cpu(req->index) - 1];
 440         srclen = 0;
 441
 442         debug("req=%u (%#x), type=%u (%#x), value=%u, index=%u\n",
 443               req->request, req->request,
 444               req->requesttype, req->requesttype,
 445               le16_to_cpu(req->value), le16_to_cpu(req->index));
 446
 447         typeReq = req->request | req->requesttype << 8;
 448
 449         switch (typeReq) {
 450         case DeviceRequest | USB_REQ_GET_DESCRIPTOR:
 451                 switch (le16_to_cpu(req->value) >> 8) {
 452                 case USB_DT_DEVICE:
 453                         debug("USB_DT_DEVICE request\n");
 454                         srcptr = &descriptor.device;
 455                         srclen = 0x12;
 456                         break;
 457                 case USB_DT_CONFIG:
 458                         debug("USB_DT_CONFIG config\n");
 459                         srcptr = &descriptor.config;
 460                         srclen = 0x19;
 461                         break;
 462                 case USB_DT_STRING:
 463                         debug("USB_DT_STRING config\n");
 464                         switch (le16_to_cpu(req->value) & 0xff) {
 465                         case 0: /* Language */
 466                                 srcptr = "\4\3\1\0";
 467                                 srclen = 4;
 468                                 break;
 469                         case 1: /* Vendor */
 470                                 srcptr = "\16\3u\0-\0b\0o\0o\0t\0";
 471                                 srclen = 14;
 472                                 break;
 473                         case 2: /* Product */
 474                                 srcptr = "\52\3E\0H\0C\0I\0 "
 475                                          "\0H\0o\0s\0t\0 "
 476                                          "\0C\0o\0n\0t\0r\0o\0l\0l\0e\0r\0";
 477                                 srclen = 42;
 478                                 break;
 479                         default:
 480                                 debug("unknown value DT_STRING %x\n",
 481                                         le16_to_cpu(req->value));
 482                                 goto unknown;
 483                         }
 484                         break;
 485                 default:
 486                         debug("unknown value %x\n", le16_to_cpu(req->value));
 487                         goto unknown;
 488                 }
 489                 break;
 490         case USB_REQ_GET_DESCRIPTOR | ((USB_DIR_IN | USB_RT_HUB) << 8):
 491                 switch (le16_to_cpu(req->value) >> 8) {
 492                 case USB_DT_HUB:
 493                         debug("USB_DT_HUB config\n");
 494                         srcptr = &descriptor.hub;
 495                         srclen = 0x8;
 496                         break;
 497                 default:
 498                         debug("unknown value %x\n", le16_to_cpu(req->value));
 499                         goto unknown;
 500                 }
 501                 break;
 502         case USB_REQ_SET_ADDRESS | (USB_RECIP_DEVICE << 8):
 503                 debug("USB_REQ_SET_ADDRESS\n");
 504                 rootdev = le16_to_cpu(req->value);
 505                 break;
 506         case DeviceOutRequest | USB_REQ_SET_CONFIGURATION:
 507                 debug("USB_REQ_SET_CONFIGURATION\n");
 508                 /* Nothing to do */
 509                 break;
 510         case USB_REQ_GET_STATUS | ((USB_DIR_IN | USB_RT_HUB) << 8):
 511                 tmpbuf[0] = 1;  /* USB_STATUS_SELFPOWERED */
 512                 tmpbuf[1] = 0;
 513                 srcptr = tmpbuf;
 514                 srclen = 2;
 515                 break;
 516         case USB_REQ_GET_STATUS | ((USB_RT_PORT | USB_DIR_IN) << 8):
 517                 memset(tmpbuf, 0, 4);
 518                 reg = ehci_readl(status_reg);
 519                 if (reg & EHCI_PS_CS)
 520                         tmpbuf[0] |= USB_PORT_STAT_CONNECTION;
 521                 if (reg & EHCI_PS_PE)
 522                         tmpbuf[0] |= USB_PORT_STAT_ENABLE;
 523                 if (reg & EHCI_PS_SUSP)
 524                         tmpbuf[0] |= USB_PORT_STAT_SUSPEND;
 525                 if (reg & EHCI_PS_OCA)
 526                         tmpbuf[0] |= USB_PORT_STAT_OVERCURRENT;
 527                 if (reg & EHCI_PS_PR)
 528                         tmpbuf[0] |= USB_PORT_STAT_RESET;
 529                 if (reg & EHCI_PS_PP)
 530                         tmpbuf[1] |= USB_PORT_STAT_POWER >> 8;
 531
 532                 if (ehci_is_TDI()) {
 533                         switch ((reg >> 26) & 3) {
 534                         case 0:
 535                                 break;
 536                         case 1:
 537                                 tmpbuf[1] |= USB_PORT_STAT_LOW_SPEED >> 8;
 538                                 break;
 539                         case 2:
 540                         default:
 541                                 tmpbuf[1] |= USB_PORT_STAT_HIGH_SPEED >> 8;
 542                                 break;
 543                         }
 544                 } else {
 545                         tmpbuf[1] |= USB_PORT_STAT_HIGH_SPEED >> 8;
 546                 }
 547
 548                 if (reg & EHCI_PS_CSC)
 549                         tmpbuf[2] |= USB_PORT_STAT_C_CONNECTION;
 550                 if (reg & EHCI_PS_PEC)
 551                         tmpbuf[2] |= USB_PORT_STAT_C_ENABLE;
 552                 if (reg & EHCI_PS_OCC)
 553                         tmpbuf[2] |= USB_PORT_STAT_C_OVERCURRENT;
 554                 if (portreset & (1 << le16_to_cpu(req->index)))
 555                         tmpbuf[2] |= USB_PORT_STAT_C_RESET;
 556
 557                 srcptr = tmpbuf;
 558                 srclen = 4;
 559                 break;
 560         case USB_REQ_SET_FEATURE | ((USB_DIR_OUT | USB_RT_PORT) << 8):
 561                 reg = ehci_readl(status_reg);
 562                 reg &= ~EHCI_PS_CLEAR;
 563                 switch (le16_to_cpu(req->value)) {
 564                 case USB_PORT_FEAT_ENABLE:
 565                         reg |= EHCI_PS_PE;
 566                         ehci_writel(status_reg, reg);
 567                         break;
 568                 case USB_PORT_FEAT_POWER:
 569                         if (HCS_PPC(ehci_readl(&hccr->cr_hcsparams))) {
 570                                 reg |= EHCI_PS_PP;
 571                                 ehci_writel(status_reg, reg);
 572                         }
 573                         break;
 574                 case USB_PORT_FEAT_RESET:
 575                         if ((reg & (EHCI_PS_PE | EHCI_PS_CS)) == EHCI_PS_CS &&
 576                             !ehci_is_TDI() &&
 577                             EHCI_PS_IS_LOWSPEED(reg)) {
 578                                 /* Low speed device, give up ownership. */
 579                                 debug("port %d low speed --> companion\n",
 580                                       req->index - 1);
 581                                 reg |= EHCI_PS_PO;
 582                                 ehci_writel(status_reg, reg);
 583                                 break;
 584                         } else {
 585                                 int ret;
 586
 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                                 ehci_powerup_fixup(status_reg, &reg);
 596
 597                                 ehci_writel(status_reg, reg & ~EHCI_PS_PR);
 598                                 /*
 599                                  * A host controller must terminate the reset
 600                                  * and stabilize the state of the port within
 601                                  * 2 milliseconds
 602                                  */
 603                                 ret = handshake(status_reg, EHCI_PS_PR, 0,
 604                                                 2 * 1000);
 605                                 if (!ret)
 606                                         portreset |=
 607                                                 1 << le16_to_cpu(req->index);
 608                                 else
 609                                         printf("port(%d) reset error\n",
 610                                         le16_to_cpu(req->index) - 1);
 611                         }
 612                         break;
 613                 default:
 614                         debug("unknown feature %x\n", le16_to_cpu(req->value));
 615                         goto unknown;
 616                 }
 617                 /* unblock posted writes */
 618                 (void) ehci_readl(&hcor->or_usbcmd);
 619                 break;
 620         case USB_REQ_CLEAR_FEATURE | ((USB_DIR_OUT | USB_RT_PORT) << 8):
 621                 reg = ehci_readl(status_reg);
 622                 switch (le16_to_cpu(req->value)) {
 623                 case USB_PORT_FEAT_ENABLE:
 624                         reg &= ~EHCI_PS_PE;
 625                         break;
 626                 case USB_PORT_FEAT_C_ENABLE:
 627                         reg = (reg & ~EHCI_PS_CLEAR) | EHCI_PS_PE;
 628                         break;
 629                 case USB_PORT_FEAT_POWER:
 630                         if (HCS_PPC(ehci_readl(&hccr->cr_hcsparams)))
 631                                 reg = reg & ~(EHCI_PS_CLEAR | EHCI_PS_PP);
 632                 case USB_PORT_FEAT_C_CONNECTION:
 633                         reg = (reg & ~EHCI_PS_CLEAR) | EHCI_PS_CSC;
 634                         break;
 635                 case USB_PORT_FEAT_OVER_CURRENT:
 636                         reg = (reg & ~EHCI_PS_CLEAR) | EHCI_PS_OCC;
 637                         break;
 638                 case USB_PORT_FEAT_C_RESET:
 639                         portreset &= ~(1 << le16_to_cpu(req->index));
 640                         break;
 641                 default:
 642                         debug("unknown feature %x\n", le16_to_cpu(req->value));
 643                         goto unknown;
 644                 }
 645                 ehci_writel(status_reg, reg);
 646                 /* unblock posted write */
 647                 (void) ehci_readl(&hcor->or_usbcmd);
 648                 break;
 649         default:
 650                 debug("Unknown request\n");
 651                 goto unknown;
 652         }
 653
 654         mdelay(1);
 655         len = min3(srclen, le16_to_cpu(req->length), length);
 656         if (srcptr != NULL && len > 0)
 657                 memcpy(buffer, srcptr, len);
 658         else
 659                 debug("Len is 0\n");
 660
 661         dev->act_len = len;
 662         dev->status = 0;
 663         return 0;
 664
 665 unknown:
 666         debug("requesttype=%x, request=%x, value=%x, index=%x, length=%x\n",
 667               req->requesttype, req->request, le16_to_cpu(req->value),
 668               le16_to_cpu(req->index), le16_to_cpu(req->length));
 669
 670         dev->act_len = 0;
 671         dev->status = USB_ST_STALLED;
 672         return -1;
 673 }
 674
 675 int usb_lowlevel_stop(void)
 676 {
 677         return ehci_hcd_stop();
 678 }
 679
 680 int usb_lowlevel_init(void)
 681 {
 682         uint32_t reg;
 683         uint32_t cmd;
 684
 685         if (ehci_hcd_init() != 0)
 686                 return -1;
 687
 688         /* EHCI spec section 4.1 */
 689         if (ehci_reset() != 0)
 690                 return -1;
 691
 692 #if defined(CONFIG_EHCI_HCD_INIT_AFTER_RESET)
 693         if (ehci_hcd_init() != 0)
 694                 return -1;
 695 #endif
 696
 697         /* Set head of reclaim list */
 698         memset(&qh_list, 0, sizeof(qh_list));
 699         qh_list.qh_link = cpu_to_hc32((uint32_t)&qh_list | QH_LINK_TYPE_QH);
 700         qh_list.qh_endpt1 = cpu_to_hc32((1 << 15) | (USB_SPEED_HIGH << 12));
 701         qh_list.qh_curtd = cpu_to_hc32(QT_NEXT_TERMINATE);
 702         qh_list.qh_overlay.qt_next = cpu_to_hc32(QT_NEXT_TERMINATE);
 703         qh_list.qh_overlay.qt_altnext = cpu_to_hc32(QT_NEXT_TERMINATE);
 704         qh_list.qh_overlay.qt_token = cpu_to_hc32(0x40);
 705
 706         /* Set async. queue head pointer. */
 707         ehci_writel(&hcor->or_asynclistaddr, (uint32_t)&qh_list);
 708
 709         reg = ehci_readl(&hccr->cr_hcsparams);
 710         descriptor.hub.bNbrPorts = HCS_N_PORTS(reg);
 711         printf("Register %x NbrPorts %d\n", reg, descriptor.hub.bNbrPorts);
 712         /* Port Indicators */
 713         if (HCS_INDICATOR(reg))
 714                 descriptor.hub.wHubCharacteristics |= 0x80;
 715         /* Port Power Control */
 716         if (HCS_PPC(reg))
 717                 descriptor.hub.wHubCharacteristics |= 0x01;
 718
 719         /* Start the host controller. */
 720         cmd = ehci_readl(&hcor->or_usbcmd);
 721         /*
 722          * Philips, Intel, and maybe others need CMD_RUN before the
 723          * root hub will detect new devices (why?); NEC doesn't
 724          */
 725         cmd &= ~(CMD_LRESET|CMD_IAAD|CMD_PSE|CMD_ASE|CMD_RESET);
 726         cmd |= CMD_RUN;
 727         ehci_writel(&hcor->or_usbcmd, cmd);
 728
 729         /* take control over the ports */
 730         cmd = ehci_readl(&hcor->or_configflag);
 731         cmd |= FLAG_CF;
 732         ehci_writel(&hcor->or_configflag, cmd);
 733         /* unblock posted write */
 734         cmd = ehci_readl(&hcor->or_usbcmd);
 735         mdelay(5);
 736         reg = HC_VERSION(ehci_readl(&hccr->cr_capbase));
 737         printf("USB EHCI %x.%02x\n", reg >> 8, reg & 0xff);
 738
 739         rootdev = 0;
 740
 741         return 0;
 742 }
 743
 744 int
 745 submit_bulk_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
 746                 int length)
 747 {
 748
 749         if (usb_pipetype(pipe) != PIPE_BULK) {
 750                 debug("non-bulk pipe (type=%lu)", usb_pipetype(pipe));
 751                 return -1;
 752         }
 753         return ehci_submit_async(dev, pipe, buffer, length, NULL);
 754 }
 755
 756 int
 757 submit_control_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
 758                    int length, struct devrequest *setup)
 759 {
 760
 761         if (usb_pipetype(pipe) != PIPE_CONTROL) {
 762                 debug("non-control pipe (type=%lu)", usb_pipetype(pipe));
 763                 return -1;
 764         }
 765
 766         if (usb_pipedevice(pipe) == rootdev) {
 767                 if (rootdev == 0)
 768                         dev->speed = USB_SPEED_HIGH;
 769                 return ehci_submit_root(dev, pipe, buffer, length, setup);
 770         }
 771         return ehci_submit_async(dev, pipe, buffer, length, setup);
 772 }
 773
 774 int
 775 submit_int_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
 776                int length, int interval)
 777 {
 778
 779         debug("dev=%p, pipe=%lu, buffer=%p, length=%d, interval=%d",
 780               dev, pipe, buffer, length, interval);
 781         return ehci_submit_async(dev, pipe, buffer, length, NULL);
 782 }