git.sur5r.net Git - u-boot/blob - 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 usec)
 110 {
 111         uint32_t result;
 112         do {
 113                 result = ehci_readl(ptr);
 114                 if (result == ~(uint32_t)0)
 115                         return -1;
 116                 result &= mask;
 117                 if (result == done)
 118                         return 0;
 119                 udelay(1);
 120                 usec--;
 121         } while (usec > 0);
 122         return -1;
 123 }
 124
 125 static void ehci_free(void *p, size_t sz)
 126 {
 127
 128 }
 129
 130 static int ehci_reset(void)
 131 {
 132         uint32_t cmd;
 133         uint32_t tmp;
 134         uint32_t *reg_ptr;
 135         int ret = 0;
 136
 137         cmd = ehci_readl(&hcor->or_usbcmd);
 138         cmd |= CMD_RESET;
 139         ehci_writel(&hcor->or_usbcmd, cmd);
 140         ret = handshake((uint32_t *)&hcor->or_usbcmd, CMD_RESET, 0, 250 * 1000);
 141         if (ret < 0) {
 142                 printf("EHCI fail to reset\n");
 143                 goto out;
 144         }
 145
 146         if (ehci_is_TDI()) {
 147                 reg_ptr = (uint32_t *)((u8 *)hcor + USBMODE);
 148                 tmp = ehci_readl(reg_ptr);
 149                 tmp |= USBMODE_CM_HC;
 150 #if defined(CONFIG_EHCI_MMIO_BIG_ENDIAN)
 151                 tmp |= USBMODE_BE;
 152 #endif
 153                 ehci_writel(reg_ptr, tmp);
 154         }
 155 out:
 156         return ret;
 157 }
 158
 159 static void *ehci_alloc(size_t sz, size_t align)
 160 {
 161         static struct QH qh __attribute__((aligned(32)));
 162         static struct qTD td[3] __attribute__((aligned (32)));
 163         static int ntds;
 164         void *p;
 165
 166         switch (sz) {
 167         case sizeof(struct QH):
 168                 p = &qh;
 169                 ntds = 0;
 170                 break;
 171         case sizeof(struct qTD):
 172                 if (ntds == 3) {
 173                         debug("out of TDs\n");
 174                         return NULL;
 175                 }
 176                 p = &td[ntds];
 177                 ntds++;
 178                 break;
 179         default:
 180                 debug("unknown allocation size\n");
 181                 return NULL;
 182         }
 183
 184         memset(p, sz, 0);
 185         return p;
 186 }
 187
 188 static int ehci_td_buffer(struct qTD *td, void *buf, size_t sz)
 189 {
 190         uint32_t addr, delta, next;
 191         int idx;
 192
 193         addr = (uint32_t) buf;
 194         idx = 0;
 195         while (idx < 5) {
 196                 td->qt_buffer[idx] = cpu_to_hc32(addr);
 197                 next = (addr + 4096) & ~4095;
 198                 delta = next - addr;
 199                 if (delta >= sz)
 200                         break;
 201                 sz -= delta;
 202                 addr = next;
 203                 idx++;
 204         }
 205
 206         if (idx == 5) {
 207                 debug("out of buffer pointers (%u bytes left)\n", sz);
 208                 return -1;
 209         }
 210
 211         return 0;
 212 }
 213
 214 static int
 215 ehci_submit_async(struct usb_device *dev, unsigned long pipe, void *buffer,
 216                    int length, struct devrequest *req)
 217 {
 218         struct QH *qh;
 219         struct qTD *td;
 220         volatile struct qTD *vtd;
 221         unsigned long ts;
 222         uint32_t *tdp;
 223         uint32_t endpt, token, usbsts;
 224         uint32_t c, toggle;
 225         uint32_t cmd;
 226         int ret = 0;
 227
 228         debug("dev=%p, pipe=%lx, buffer=%p, length=%d, req=%p\n", dev, pipe,
 229               buffer, length, req);
 230         if (req != NULL)
 231                 debug("req=%u (%#x), type=%u (%#x), value=%u (%#x), index=%u\n",
 232                       req->request, req->request,
 233                       req->requesttype, req->requesttype,
 234                       le16_to_cpu(req->value), le16_to_cpu(req->value),
 235                       le16_to_cpu(req->index));
 236
 237         qh = ehci_alloc(sizeof(struct QH), 32);
 238         if (qh == NULL) {
 239                 debug("unable to allocate QH\n");
 240                 return -1;
 241         }
 242         qh->qh_link = cpu_to_hc32((uint32_t)&qh_list | QH_LINK_TYPE_QH);
 243         c = (usb_pipespeed(pipe) != USB_SPEED_HIGH &&
 244              usb_pipeendpoint(pipe) == 0) ? 1 : 0;
 245         endpt = (8 << 28) |
 246             (c << 27) |
 247             (usb_maxpacket(dev, pipe) << 16) |
 248             (0 << 15) |
 249             (1 << 14) |
 250             (usb_pipespeed(pipe) << 12) |
 251             (usb_pipeendpoint(pipe) << 8) |
 252             (0 << 7) | (usb_pipedevice(pipe) << 0);
 253         qh->qh_endpt1 = cpu_to_hc32(endpt);
 254         endpt = (1 << 30) |
 255             (dev->portnr << 23) |
 256             (dev->parent->devnum << 16) | (0 << 8) | (0 << 0);
 257         qh->qh_endpt2 = cpu_to_hc32(endpt);
 258         qh->qh_overlay.qt_next = cpu_to_hc32(QT_NEXT_TERMINATE);
 259         qh->qh_overlay.qt_altnext = cpu_to_hc32(QT_NEXT_TERMINATE);
 260
 261         td = NULL;
 262         tdp = &qh->qh_overlay.qt_next;
 263
 264         toggle =
 265             usb_gettoggle(dev, usb_pipeendpoint(pipe), usb_pipeout(pipe));
 266
 267         if (req != NULL) {
 268                 td = ehci_alloc(sizeof(struct qTD), 32);
 269                 if (td == NULL) {
 270                         debug("unable to allocate SETUP td\n");
 271                         goto fail;
 272                 }
 273                 td->qt_next = cpu_to_hc32(QT_NEXT_TERMINATE);
 274                 td->qt_altnext = cpu_to_hc32(QT_NEXT_TERMINATE);
 275                 token = (0 << 31) |
 276                     (sizeof(*req) << 16) |
 277                     (0 << 15) | (0 << 12) | (3 << 10) | (2 << 8) | (0x80 << 0);
 278                 td->qt_token = cpu_to_hc32(token);
 279                 if (ehci_td_buffer(td, req, sizeof(*req)) != 0) {
 280                         debug("unable construct SETUP td\n");
 281                         ehci_free(td, sizeof(*td));
 282                         goto fail;
 283                 }
 284                 *tdp = cpu_to_hc32((uint32_t) td);
 285                 tdp = &td->qt_next;
 286                 toggle = 1;
 287         }
 288
 289         if (length > 0 || req == NULL) {
 290                 td = ehci_alloc(sizeof(struct qTD), 32);
 291                 if (td == NULL) {
 292                         debug("unable to allocate DATA td\n");
 293                         goto fail;
 294                 }
 295                 td->qt_next = cpu_to_hc32(QT_NEXT_TERMINATE);
 296                 td->qt_altnext = cpu_to_hc32(QT_NEXT_TERMINATE);
 297                 token = (toggle << 31) |
 298                     (length << 16) |
 299                     ((req == NULL ? 1 : 0) << 15) |
 300                     (0 << 12) |
 301                     (3 << 10) |
 302                     ((usb_pipein(pipe) ? 1 : 0) << 8) | (0x80 << 0);
 303                 td->qt_token = cpu_to_hc32(token);
 304                 if (ehci_td_buffer(td, buffer, length) != 0) {
 305                         debug("unable construct DATA td\n");
 306                         ehci_free(td, sizeof(*td));
 307                         goto fail;
 308                 }
 309                 *tdp = cpu_to_hc32((uint32_t) td);
 310                 tdp = &td->qt_next;
 311         }
 312
 313         if (req != NULL) {
 314                 td = ehci_alloc(sizeof(struct qTD), 32);
 315                 if (td == NULL) {
 316                         debug("unable to allocate ACK td\n");
 317                         goto fail;
 318                 }
 319                 td->qt_next = cpu_to_hc32(QT_NEXT_TERMINATE);
 320                 td->qt_altnext = cpu_to_hc32(QT_NEXT_TERMINATE);
 321                 token = (toggle << 31) |
 322                     (0 << 16) |
 323                     (1 << 15) |
 324                     (0 << 12) |
 325                     (3 << 10) |
 326                     ((usb_pipein(pipe) ? 0 : 1) << 8) | (0x80 << 0);
 327                 td->qt_token = cpu_to_hc32(token);
 328                 *tdp = cpu_to_hc32((uint32_t) td);
 329                 tdp = &td->qt_next;
 330         }
 331
 332         qh_list.qh_link = cpu_to_hc32((uint32_t) qh | QH_LINK_TYPE_QH);
 333
 334         usbsts = ehci_readl(&hcor->or_usbsts);
 335         ehci_writel(&hcor->or_usbsts, (usbsts & 0x3f));
 336
 337         /* Enable async. schedule. */
 338         cmd = ehci_readl(&hcor->or_usbcmd);
 339         cmd |= CMD_ASE;
 340         ehci_writel(&hcor->or_usbcmd, cmd);
 341
 342         ret = handshake((uint32_t *)&hcor->or_usbsts, STD_ASS, STD_ASS,
 343                         100 * 1000);
 344         if (ret < 0) {
 345                 printf("EHCI fail timeout STD_ASS set\n");
 346                 goto fail;
 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         ret = handshake((uint32_t *)&hcor->or_usbsts, STD_ASS, 0,
 364                         100 * 1000);
 365         if (ret < 0) {
 366                 printf("EHCI fail timeout STD_ASS reset\n");
 367                 goto fail;
 368         }
 369
 370         qh_list.qh_link = cpu_to_hc32((uint32_t)&qh_list | QH_LINK_TYPE_QH);
 371
 372         token = hc32_to_cpu(qh->qh_overlay.qt_token);
 373         if (!(token & 0x80)) {
 374                 debug("TOKEN=%#x\n", token);
 375                 switch (token & 0xfc) {
 376                 case 0:
 377                         toggle = token >> 31;
 378                         usb_settoggle(dev, usb_pipeendpoint(pipe),
 379                                        usb_pipeout(pipe), toggle);
 380                         dev->status = 0;
 381                         break;
 382                 case 0x40:
 383                         dev->status = USB_ST_STALLED;
 384                         break;
 385                 case 0xa0:
 386                 case 0x20:
 387                         dev->status = USB_ST_BUF_ERR;
 388                         break;
 389                 case 0x50:
 390                 case 0x10:
 391                         dev->status = USB_ST_BABBLE_DET;
 392                         break;
 393                 default:
 394                         dev->status = USB_ST_CRC_ERR;
 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         td = (void *)hc32_to_cpu(qh->qh_overlay.qt_next);
 410         while (td != (void *)QT_NEXT_TERMINATE) {
 411                 qh->qh_overlay.qt_next = td->qt_next;
 412                 ehci_free(td, sizeof(*td));
 413                 td = (void *)hc32_to_cpu(qh->qh_overlay.qt_next);
 414         }
 415         ehci_free(qh, sizeof(*qh));
 416         return -1;
 417 }
 418
 419 static inline int min3(int a, int b, int c)
 420 {
 421
 422         if (b < a)
 423                 a = b;
 424         if (c < a)
 425                 a = c;
 426         return a;
 427 }
 428
 429 int
 430 ehci_submit_root(struct usb_device *dev, unsigned long pipe, void *buffer,
 431                  int length, struct devrequest *req)
 432 {
 433         uint8_t tmpbuf[4];
 434         u16 typeReq;
 435         void *srcptr = NULL;
 436         int len, srclen;
 437         uint32_t reg;
 438         uint32_t *status_reg;
 439
 440         if (le16_to_cpu(req->index) >= CONFIG_SYS_USB_EHCI_MAX_ROOT_PORTS) {
 441                 printf("The request port(%d) is not configured\n",
 442                         le16_to_cpu(req->index) - 1);
 443                 return -1;
 444         }
 445         status_reg = (uint32_t *)&hcor->or_portsc[
 446                                                 le16_to_cpu(req->index) - 1];
 447         srclen = 0;
 448
 449         debug("req=%u (%#x), type=%u (%#x), value=%u, index=%u\n",
 450               req->request, req->request,
 451               req->requesttype, req->requesttype,
 452               le16_to_cpu(req->value), le16_to_cpu(req->index));
 453
 454         typeReq = req->request << 8 | req->requesttype;
 455
 456         switch (le16_to_cpu(typeReq)) {
 457         case DeviceRequest | USB_REQ_GET_DESCRIPTOR:
 458                 switch (le16_to_cpu(req->value) >> 8) {
 459                 case USB_DT_DEVICE:
 460                         debug("USB_DT_DEVICE request\n");
 461                         srcptr = &descriptor.device;
 462                         srclen = 0x12;
 463                         break;
 464                 case USB_DT_CONFIG:
 465                         debug("USB_DT_CONFIG config\n");
 466                         srcptr = &descriptor.config;
 467                         srclen = 0x19;
 468                         break;
 469                 case USB_DT_STRING:
 470                         debug("USB_DT_STRING config\n");
 471                         switch (le16_to_cpu(req->value) & 0xff) {
 472                         case 0: /* Language */
 473                                 srcptr = "\4\3\1\0";
 474                                 srclen = 4;
 475                                 break;
 476                         case 1: /* Vendor */
 477                                 srcptr = "\16\3u\0-\0b\0o\0o\0t\0";
 478                                 srclen = 14;
 479                                 break;
 480                         case 2: /* Product */
 481                                 srcptr = "\52\3E\0H\0C\0I\0 "
 482                                          "\0H\0o\0s\0t\0 "
 483                                          "\0C\0o\0n\0t\0r\0o\0l\0l\0e\0r\0";
 484                                 srclen = 42;
 485                                 break;
 486                         default:
 487                                 debug("unknown value DT_STRING %x\n",
 488                                         le16_to_cpu(req->value));
 489                                 goto unknown;
 490                         }
 491                         break;
 492                 default:
 493                         debug("unknown value %x\n", le16_to_cpu(req->value));
 494                         goto unknown;
 495                 }
 496                 break;
 497         case USB_REQ_GET_DESCRIPTOR | ((USB_DIR_IN | USB_RT_HUB) << 8):
 498                 switch (le16_to_cpu(req->value) >> 8) {
 499                 case USB_DT_HUB:
 500                         debug("USB_DT_HUB config\n");
 501                         srcptr = &descriptor.hub;
 502                         srclen = 0x8;
 503                         break;
 504                 default:
 505                         debug("unknown value %x\n", le16_to_cpu(req->value));
 506                         goto unknown;
 507                 }
 508                 break;
 509         case USB_REQ_SET_ADDRESS | (USB_RECIP_DEVICE << 8):
 510                 debug("USB_REQ_SET_ADDRESS\n");
 511                 rootdev = le16_to_cpu(req->value);
 512                 break;
 513         case DeviceOutRequest | USB_REQ_SET_CONFIGURATION:
 514                 debug("USB_REQ_SET_CONFIGURATION\n");
 515                 /* Nothing to do */
 516                 break;
 517         case USB_REQ_GET_STATUS | ((USB_DIR_IN | USB_RT_HUB) << 8):
 518                 tmpbuf[0] = 1;  /* USB_STATUS_SELFPOWERED */
 519                 tmpbuf[1] = 0;
 520                 srcptr = tmpbuf;
 521                 srclen = 2;
 522                 break;
 523         case USB_REQ_GET_STATUS | ((USB_RT_PORT | USB_DIR_IN) << 8):
 524                 memset(tmpbuf, 0, 4);
 525                 reg = ehci_readl(status_reg);
 526                 if (reg & EHCI_PS_CS)
 527                         tmpbuf[0] |= USB_PORT_STAT_CONNECTION;
 528                 if (reg & EHCI_PS_PE)
 529                         tmpbuf[0] |= USB_PORT_STAT_ENABLE;
 530                 if (reg & EHCI_PS_SUSP)
 531                         tmpbuf[0] |= USB_PORT_STAT_SUSPEND;
 532                 if (reg & EHCI_PS_OCA)
 533                         tmpbuf[0] |= USB_PORT_STAT_OVERCURRENT;
 534                 if (reg & EHCI_PS_PR &&
 535                     (portreset & (1 << le16_to_cpu(req->index)))) {
 536                         int ret;
 537                         /* force reset to complete */
 538                         reg = reg & ~(EHCI_PS_PR | EHCI_PS_CLEAR);
 539                         ehci_writel(status_reg, reg);
 540                         ret = handshake(status_reg, EHCI_PS_PR, 0, 2 * 1000);
 541                         if (!ret)
 542                                 tmpbuf[0] |= USB_PORT_STAT_RESET;
 543                         else
 544                                 printf("port(%d) reset error\n",
 545                                         le16_to_cpu(req->index) - 1);
 546                 }
 547                 if (reg & EHCI_PS_PP)
 548                         tmpbuf[1] |= USB_PORT_STAT_POWER >> 8;
 549                 tmpbuf[1] |= USB_PORT_STAT_HIGH_SPEED >> 8;
 550
 551                 if (reg & EHCI_PS_CSC)
 552                         tmpbuf[2] |= USB_PORT_STAT_C_CONNECTION;
 553                 if (reg & EHCI_PS_PEC)
 554                         tmpbuf[2] |= USB_PORT_STAT_C_ENABLE;
 555                 if (reg & EHCI_PS_OCC)
 556                         tmpbuf[2] |= USB_PORT_STAT_C_OVERCURRENT;
 557                 if (portreset & (1 << le16_to_cpu(req->index)))
 558                         tmpbuf[2] |= USB_PORT_STAT_C_RESET;
 559
 560                 srcptr = tmpbuf;
 561                 srclen = 4;
 562                 break;
 563         case USB_REQ_SET_FEATURE | ((USB_DIR_OUT | USB_RT_PORT) << 8):
 564                 reg = ehci_readl(status_reg);
 565                 reg &= ~EHCI_PS_CLEAR;
 566                 switch (le16_to_cpu(req->value)) {
 567                 case USB_PORT_FEAT_ENABLE:
 568                         reg |= EHCI_PS_PE;
 569                         ehci_writel(status_reg, reg);
 570                         break;
 571                 case USB_PORT_FEAT_POWER:
 572                         if (HCS_PPC(ehci_readl(&hccr->cr_hcsparams))) {
 573                                 reg |= EHCI_PS_PP;
 574                                 ehci_writel(status_reg, reg);
 575                         }
 576                         break;
 577                 case USB_PORT_FEAT_RESET:
 578                         if ((reg & (EHCI_PS_PE | EHCI_PS_CS)) == EHCI_PS_CS &&
 579                             !ehci_is_TDI() &&
 580                             EHCI_PS_IS_LOWSPEED(reg)) {
 581                                 /* Low speed device, give up ownership. */
 582                                 debug("port %d low speed --> companion\n",
 583                                       req->index - 1);
 584                                 reg |= EHCI_PS_PO;
 585                                 ehci_writel(status_reg, reg);
 586                                 break;
 587                         } else {
 588                                 reg |= EHCI_PS_PR;
 589                                 reg &= ~EHCI_PS_PE;
 590                                 ehci_writel(status_reg, reg);
 591                                 /*
 592                                  * caller must wait, then call GetPortStatus
 593                                  * usb 2.0 specification say 50 ms resets on
 594                                  * root
 595                                  */
 596                                 wait_ms(50);
 597                                 portreset |= 1 << le16_to_cpu(req->index);
 598                         }
 599                         break;
 600                 default:
 601                         debug("unknown feature %x\n", le16_to_cpu(req->value));
 602                         goto unknown;
 603                 }
 604                 /* unblock posted writes */
 605                 ehci_readl(&hcor->or_usbcmd);
 606                 break;
 607         case USB_REQ_CLEAR_FEATURE | ((USB_DIR_OUT | USB_RT_PORT) << 8):
 608                 reg = ehci_readl(status_reg);
 609                 switch (le16_to_cpu(req->value)) {
 610                 case USB_PORT_FEAT_ENABLE:
 611                         reg &= ~EHCI_PS_PE;
 612                         break;
 613                 case USB_PORT_FEAT_C_ENABLE:
 614                         reg = (reg & ~EHCI_PS_CLEAR) | EHCI_PS_PE;
 615                         break;
 616                 case USB_PORT_FEAT_POWER:
 617                         if (HCS_PPC(ehci_readl(&hccr->cr_hcsparams)))
 618                                 reg = reg & ~(EHCI_PS_CLEAR | EHCI_PS_PP);
 619                 case USB_PORT_FEAT_C_CONNECTION:
 620                         reg = (reg & ~EHCI_PS_CLEAR) | EHCI_PS_CSC;
 621                         break;
 622                 case USB_PORT_FEAT_OVER_CURRENT:
 623                         reg = (reg & ~EHCI_PS_CLEAR) | EHCI_PS_OCC;
 624                         break;
 625                 case USB_PORT_FEAT_C_RESET:
 626                         portreset &= ~(1 << le16_to_cpu(req->index));
 627                         break;
 628                 default:
 629                         debug("unknown feature %x\n", le16_to_cpu(req->value));
 630                         goto unknown;
 631                 }
 632                 ehci_writel(status_reg, reg);
 633                 /* unblock posted write */
 634                 ehci_readl(&hcor->or_usbcmd);
 635                 break;
 636         default:
 637                 debug("Unknown request\n");
 638                 goto unknown;
 639         }
 640
 641         wait_ms(1);
 642         len = min3(srclen, le16_to_cpu(req->length), length);
 643         if (srcptr != NULL && len > 0)
 644                 memcpy(buffer, srcptr, len);
 645         else
 646                 debug("Len is 0\n");
 647
 648         dev->act_len = len;
 649         dev->status = 0;
 650         return 0;
 651
 652 unknown:
 653         debug("requesttype=%x, request=%x, value=%x, index=%x, length=%x\n",
 654               req->requesttype, req->request, le16_to_cpu(req->value),
 655               le16_to_cpu(req->index), le16_to_cpu(req->length));
 656
 657         dev->act_len = 0;
 658         dev->status = USB_ST_STALLED;
 659         return -1;
 660 }
 661
 662 int usb_lowlevel_stop(void)
 663 {
 664         return ehci_hcd_stop();
 665 }
 666
 667 int usb_lowlevel_init(void)
 668 {
 669         uint32_t reg;
 670         uint32_t cmd;
 671
 672         if (ehci_hcd_init() != 0)
 673                 return -1;
 674
 675         /* EHCI spec section 4.1 */
 676         if (ehci_reset() != 0)
 677                 return -1;
 678
 679         /* Set head of reclaim list */
 680         memset(&qh_list, 0, sizeof(qh_list));
 681         qh_list.qh_link = cpu_to_hc32((uint32_t)&qh_list | QH_LINK_TYPE_QH);
 682         qh_list.qh_endpt1 = cpu_to_hc32((1 << 15) | (USB_SPEED_HIGH << 12));
 683         qh_list.qh_curtd = cpu_to_hc32(QT_NEXT_TERMINATE);
 684         qh_list.qh_overlay.qt_next = cpu_to_hc32(QT_NEXT_TERMINATE);
 685         qh_list.qh_overlay.qt_altnext = cpu_to_hc32(QT_NEXT_TERMINATE);
 686         qh_list.qh_overlay.qt_token = cpu_to_hc32(0x40);
 687
 688         /* Set async. queue head pointer. */
 689         ehci_writel(&hcor->or_asynclistaddr, (uint32_t)&qh_list);
 690
 691         reg = ehci_readl(&hccr->cr_hcsparams);
 692         descriptor.hub.bNbrPorts = HCS_N_PORTS(reg);
 693         printf("Register %x NbrPorts %d\n", reg, descriptor.hub.bNbrPorts);
 694         /* Port Indicators */
 695         if (HCS_INDICATOR(reg))
 696                 descriptor.hub.wHubCharacteristics |= 0x80;
 697         /* Port Power Control */
 698         if (HCS_PPC(reg))
 699                 descriptor.hub.wHubCharacteristics |= 0x01;
 700
 701         /* Start the host controller. */
 702         cmd = ehci_readl(&hcor->or_usbcmd);
 703         /* Philips, Intel, and maybe others need CMD_RUN before the
 704          * root hub will detect new devices (why?); NEC doesn't */
 705         cmd &= ~(CMD_LRESET|CMD_IAAD|CMD_PSE|CMD_ASE|CMD_RESET);
 706         cmd |= CMD_RUN;
 707         ehci_writel(&hcor->or_usbcmd, cmd);
 708
 709         /* take control over the ports */
 710         cmd = ehci_readl(&hcor->or_configflag);
 711         cmd |= FLAG_CF;
 712         ehci_writel(&hcor->or_configflag, cmd);
 713         /* unblock posted write */
 714         cmd = ehci_readl(&hcor->or_usbcmd);
 715         wait_ms(5);
 716         reg = HC_VERSION(ehci_readl(&hccr->cr_capbase));
 717         printf("USB EHCI %x.%02x\n", reg >> 8, reg & 0xff);
 718
 719         rootdev = 0;
 720
 721         return 0;
 722 }
 723
 724 int
 725 submit_bulk_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
 726                 int length)
 727 {
 728
 729         if (usb_pipetype(pipe) != PIPE_BULK) {
 730                 debug("non-bulk pipe (type=%lu)", usb_pipetype(pipe));
 731                 return -1;
 732         }
 733         return ehci_submit_async(dev, pipe, buffer, length, NULL);
 734 }
 735
 736 int
 737 submit_control_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
 738                    int length, struct devrequest *setup)
 739 {
 740
 741         if (usb_pipetype(pipe) != PIPE_CONTROL) {
 742                 debug("non-control pipe (type=%lu)", usb_pipetype(pipe));
 743                 return -1;
 744         }
 745
 746         if (usb_pipedevice(pipe) == rootdev) {
 747                 if (rootdev == 0)
 748                         dev->speed = USB_SPEED_HIGH;
 749                 return ehci_submit_root(dev, pipe, buffer, length, setup);
 750         }
 751         return ehci_submit_async(dev, pipe, buffer, length, setup);
 752 }
 753
 754 int
 755 submit_int_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
 756                int length, int interval)
 757 {
 758
 759         debug("dev=%p, pipe=%lu, buffer=%p, length=%d, interval=%d",
 760               dev, pipe, buffer, length, interval);
 761         return -1;
 762 }