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                 0xff,           /* 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 #if defined(CONFIG_EHCI_DCACHE)
 112 /*
 113  * Routines to handle (flush/invalidate) the dcache for the QH and qTD
 114  * structures and data buffers. This is needed on platforms using this
 115  * EHCI support with dcache enabled.
 116  */
 117 static void flush_invalidate(u32 addr, int size, int flush)
 118 {
 119         if (flush)
 120                 flush_dcache_range(addr, addr + size);
 121         else
 122                 invalidate_dcache_range(addr, addr + size);
 123 }
 124
 125 static void cache_qtd(struct qTD *qtd, int flush)
 126 {
 127         u32 *ptr = (u32 *)qtd->qt_buffer[0];
 128         int len = (qtd->qt_token & 0x7fff0000) >> 16;
 129
 130         flush_invalidate((u32)qtd, sizeof(struct qTD), flush);
 131         if (ptr && len)
 132                 flush_invalidate((u32)ptr, len, flush);
 133 }
 134
 135
 136 static inline struct QH *qh_addr(struct QH *qh)
 137 {
 138         return (struct QH *)((u32)qh & 0xffffffe0);
 139 }
 140
 141 static void cache_qh(struct QH *qh, int flush)
 142 {
 143         struct qTD *qtd;
 144         struct qTD *next;
 145         static struct qTD *first_qtd;
 146
 147         /*
 148          * Walk the QH list and flush/invalidate all entries
 149          */
 150         while (1) {
 151                 flush_invalidate((u32)qh_addr(qh), sizeof(struct QH), flush);
 152                 if ((u32)qh & QH_LINK_TYPE_QH)
 153                         break;
 154                 qh = qh_addr(qh);
 155                 qh = (struct QH *)qh->qh_link;
 156         }
 157         qh = qh_addr(qh);
 158
 159         /*
 160          * Save first qTD pointer, needed for invalidating pass on this QH
 161          */
 162         if (flush)
 163                 first_qtd = qtd = (struct qTD *)(*(u32 *)&qh->qh_overlay &
 164                                                  0xffffffe0);
 165         else
 166                 qtd = first_qtd;
 167
 168         /*
 169          * Walk the qTD list and flush/invalidate all entries
 170          */
 171         while (1) {
 172                 if (qtd == NULL)
 173                         break;
 174                 cache_qtd(qtd, flush);
 175                 next = (struct qTD *)((u32)qtd->qt_next & 0xffffffe0);
 176                 if (next == qtd)
 177                         break;
 178                 qtd = next;
 179         }
 180 }
 181
 182 static inline void ehci_flush_dcache(struct QH *qh)
 183 {
 184         cache_qh(qh, 1);
 185 }
 186
 187 static inline void ehci_invalidate_dcache(struct QH *qh)
 188 {
 189         cache_qh(qh, 0);
 190 }
 191 #else /* CONFIG_EHCI_DCACHE */
 192 /*
 193  *
 194  */
 195 static inline void ehci_flush_dcache(struct QH *qh)
 196 {
 197 }
 198
 199 static inline void ehci_invalidate_dcache(struct QH *qh)
 200 {
 201 }
 202 #endif /* CONFIG_EHCI_DCACHE */
 203
 204 static int handshake(uint32_t *ptr, uint32_t mask, uint32_t done, int usec)
 205 {
 206         uint32_t result;
 207         do {
 208                 result = ehci_readl(ptr);
 209                 udelay(5);
 210                 if (result == ~(uint32_t)0)
 211                         return -1;
 212                 result &= mask;
 213                 if (result == done)
 214                         return 0;
 215                 usec--;
 216         } while (usec > 0);
 217         return -1;
 218 }
 219
 220 static void ehci_free(void *p, size_t sz)
 221 {
 222
 223 }
 224
 225 static int ehci_reset(void)
 226 {
 227         uint32_t cmd;
 228         uint32_t tmp;
 229         uint32_t *reg_ptr;
 230         int ret = 0;
 231
 232         cmd = ehci_readl(&hcor->or_usbcmd);
 233         cmd = (cmd & ~CMD_RUN) | CMD_RESET;
 234         ehci_writel(&hcor->or_usbcmd, cmd);
 235         ret = handshake((uint32_t *)&hcor->or_usbcmd, CMD_RESET, 0, 250 * 1000);
 236         if (ret < 0) {
 237                 printf("EHCI fail to reset\n");
 238                 goto out;
 239         }
 240
 241         if (ehci_is_TDI()) {
 242                 reg_ptr = (uint32_t *)((u8 *)hcor + USBMODE);
 243                 tmp = ehci_readl(reg_ptr);
 244                 tmp |= USBMODE_CM_HC;
 245 #if defined(CONFIG_EHCI_MMIO_BIG_ENDIAN)
 246                 tmp |= USBMODE_BE;
 247 #endif
 248                 ehci_writel(reg_ptr, tmp);
 249         }
 250 out:
 251         return ret;
 252 }
 253
 254 static void *ehci_alloc(size_t sz, size_t align)
 255 {
 256         static struct QH qh __attribute__((aligned(32)));
 257         static struct qTD td[3] __attribute__((aligned (32)));
 258         static int ntds;
 259         void *p;
 260
 261         switch (sz) {
 262         case sizeof(struct QH):
 263                 p = &qh;
 264                 ntds = 0;
 265                 break;
 266         case sizeof(struct qTD):
 267                 if (ntds == 3) {
 268                         debug("out of TDs\n");
 269                         return NULL;
 270                 }
 271                 p = &td[ntds];
 272                 ntds++;
 273                 break;
 274         default:
 275                 debug("unknown allocation size\n");
 276                 return NULL;
 277         }
 278
 279         memset(p, 0, sz);
 280         return p;
 281 }
 282
 283 static int ehci_td_buffer(struct qTD *td, void *buf, size_t sz)
 284 {
 285         uint32_t addr, delta, next;
 286         int idx;
 287
 288         addr = (uint32_t) buf;
 289         idx = 0;
 290         while (idx < 5) {
 291                 td->qt_buffer[idx] = cpu_to_hc32(addr);
 292                 td->qt_buffer_hi[idx] = 0;
 293                 next = (addr + 4096) & ~4095;
 294                 delta = next - addr;
 295                 if (delta >= sz)
 296                         break;
 297                 sz -= delta;
 298                 addr = next;
 299                 idx++;
 300         }
 301
 302         if (idx == 5) {
 303                 debug("out of buffer pointers (%u bytes left)\n", sz);
 304                 return -1;
 305         }
 306
 307         return 0;
 308 }
 309
 310 static int
 311 ehci_submit_async(struct usb_device *dev, unsigned long pipe, void *buffer,
 312                    int length, struct devrequest *req)
 313 {
 314         struct QH *qh;
 315         struct qTD *td;
 316         volatile struct qTD *vtd;
 317         unsigned long ts;
 318         uint32_t *tdp;
 319         uint32_t endpt, token, usbsts;
 320         uint32_t c, toggle;
 321         uint32_t cmd;
 322         int ret = 0;
 323
 324         debug("dev=%p, pipe=%lx, buffer=%p, length=%d, req=%p\n", dev, pipe,
 325               buffer, length, req);
 326         if (req != NULL)
 327                 debug("req=%u (%#x), type=%u (%#x), value=%u (%#x), index=%u\n",
 328                       req->request, req->request,
 329                       req->requesttype, req->requesttype,
 330                       le16_to_cpu(req->value), le16_to_cpu(req->value),
 331                       le16_to_cpu(req->index));
 332
 333         qh = ehci_alloc(sizeof(struct QH), 32);
 334         if (qh == NULL) {
 335                 debug("unable to allocate QH\n");
 336                 return -1;
 337         }
 338         qh->qh_link = cpu_to_hc32((uint32_t)&qh_list | QH_LINK_TYPE_QH);
 339         c = (usb_pipespeed(pipe) != USB_SPEED_HIGH &&
 340              usb_pipeendpoint(pipe) == 0) ? 1 : 0;
 341         endpt = (8 << 28) |
 342             (c << 27) |
 343             (usb_maxpacket(dev, pipe) << 16) |
 344             (0 << 15) |
 345             (1 << 14) |
 346             (usb_pipespeed(pipe) << 12) |
 347             (usb_pipeendpoint(pipe) << 8) |
 348             (0 << 7) | (usb_pipedevice(pipe) << 0);
 349         qh->qh_endpt1 = cpu_to_hc32(endpt);
 350         endpt = (1 << 30) |
 351             (dev->portnr << 23) |
 352             (dev->parent->devnum << 16) | (0 << 8) | (0 << 0);
 353         qh->qh_endpt2 = cpu_to_hc32(endpt);
 354         qh->qh_overlay.qt_next = cpu_to_hc32(QT_NEXT_TERMINATE);
 355
 356         td = NULL;
 357         tdp = &qh->qh_overlay.qt_next;
 358
 359         toggle =
 360             usb_gettoggle(dev, usb_pipeendpoint(pipe), usb_pipeout(pipe));
 361
 362         if (req != NULL) {
 363                 td = ehci_alloc(sizeof(struct qTD), 32);
 364                 if (td == NULL) {
 365                         debug("unable to allocate SETUP td\n");
 366                         goto fail;
 367                 }
 368                 td->qt_next = cpu_to_hc32(QT_NEXT_TERMINATE);
 369                 td->qt_altnext = cpu_to_hc32(QT_NEXT_TERMINATE);
 370                 token = (0 << 31) |
 371                     (sizeof(*req) << 16) |
 372                     (0 << 15) | (0 << 12) | (3 << 10) | (2 << 8) | (0x80 << 0);
 373                 td->qt_token = cpu_to_hc32(token);
 374                 if (ehci_td_buffer(td, req, sizeof(*req)) != 0) {
 375                         debug("unable construct SETUP td\n");
 376                         ehci_free(td, sizeof(*td));
 377                         goto fail;
 378                 }
 379                 *tdp = cpu_to_hc32((uint32_t) td);
 380                 tdp = &td->qt_next;
 381                 toggle = 1;
 382         }
 383
 384         if (length > 0 || req == NULL) {
 385                 td = ehci_alloc(sizeof(struct qTD), 32);
 386                 if (td == NULL) {
 387                         debug("unable to allocate DATA td\n");
 388                         goto fail;
 389                 }
 390                 td->qt_next = cpu_to_hc32(QT_NEXT_TERMINATE);
 391                 td->qt_altnext = cpu_to_hc32(QT_NEXT_TERMINATE);
 392                 token = (toggle << 31) |
 393                     (length << 16) |
 394                     ((req == NULL ? 1 : 0) << 15) |
 395                     (0 << 12) |
 396                     (3 << 10) |
 397                     ((usb_pipein(pipe) ? 1 : 0) << 8) | (0x80 << 0);
 398                 td->qt_token = cpu_to_hc32(token);
 399                 if (ehci_td_buffer(td, buffer, length) != 0) {
 400                         debug("unable construct DATA td\n");
 401                         ehci_free(td, sizeof(*td));
 402                         goto fail;
 403                 }
 404                 *tdp = cpu_to_hc32((uint32_t) td);
 405                 tdp = &td->qt_next;
 406         }
 407
 408         if (req != NULL) {
 409                 td = ehci_alloc(sizeof(struct qTD), 32);
 410                 if (td == NULL) {
 411                         debug("unable to allocate ACK td\n");
 412                         goto fail;
 413                 }
 414                 td->qt_next = cpu_to_hc32(QT_NEXT_TERMINATE);
 415                 td->qt_altnext = cpu_to_hc32(QT_NEXT_TERMINATE);
 416                 token = (toggle << 31) |
 417                     (0 << 16) |
 418                     (1 << 15) |
 419                     (0 << 12) |
 420                     (3 << 10) |
 421                     ((usb_pipein(pipe) ? 0 : 1) << 8) | (0x80 << 0);
 422                 td->qt_token = cpu_to_hc32(token);
 423                 *tdp = cpu_to_hc32((uint32_t) td);
 424                 tdp = &td->qt_next;
 425         }
 426
 427         qh_list.qh_link = cpu_to_hc32((uint32_t) qh | QH_LINK_TYPE_QH);
 428
 429         /* Flush dcache */
 430         ehci_flush_dcache(&qh_list);
 431
 432         usbsts = ehci_readl(&hcor->or_usbsts);
 433         ehci_writel(&hcor->or_usbsts, (usbsts & 0x3f));
 434
 435         /* Enable async. schedule. */
 436         cmd = ehci_readl(&hcor->or_usbcmd);
 437         cmd |= CMD_ASE;
 438         ehci_writel(&hcor->or_usbcmd, cmd);
 439
 440         ret = handshake((uint32_t *)&hcor->or_usbsts, STD_ASS, STD_ASS,
 441                         100 * 1000);
 442         if (ret < 0) {
 443                 printf("EHCI fail timeout STD_ASS set\n");
 444                 goto fail;
 445         }
 446
 447         /* Wait for TDs to be processed. */
 448         ts = get_timer(0);
 449         vtd = td;
 450         do {
 451                 /* Invalidate dcache */
 452                 ehci_invalidate_dcache(&qh_list);
 453                 token = hc32_to_cpu(vtd->qt_token);
 454                 if (!(token & 0x80))
 455                         break;
 456                 WATCHDOG_RESET();
 457         } while (get_timer(ts) < CONFIG_SYS_HZ);
 458
 459         /* Disable async schedule. */
 460         cmd = ehci_readl(&hcor->or_usbcmd);
 461         cmd &= ~CMD_ASE;
 462         ehci_writel(&hcor->or_usbcmd, cmd);
 463
 464         ret = handshake((uint32_t *)&hcor->or_usbsts, STD_ASS, 0,
 465                         100 * 1000);
 466         if (ret < 0) {
 467                 printf("EHCI fail timeout STD_ASS reset\n");
 468                 goto fail;
 469         }
 470
 471         qh_list.qh_link = cpu_to_hc32((uint32_t)&qh_list | QH_LINK_TYPE_QH);
 472
 473         token = hc32_to_cpu(qh->qh_overlay.qt_token);
 474         if (!(token & 0x80)) {
 475                 debug("TOKEN=%#x\n", token);
 476                 switch (token & 0xfc) {
 477                 case 0:
 478                         toggle = token >> 31;
 479                         usb_settoggle(dev, usb_pipeendpoint(pipe),
 480                                        usb_pipeout(pipe), toggle);
 481                         dev->status = 0;
 482                         break;
 483                 case 0x40:
 484                         dev->status = USB_ST_STALLED;
 485                         break;
 486                 case 0xa0:
 487                 case 0x20:
 488                         dev->status = USB_ST_BUF_ERR;
 489                         break;
 490                 case 0x50:
 491                 case 0x10:
 492                         dev->status = USB_ST_BABBLE_DET;
 493                         break;
 494                 default:
 495                         dev->status = USB_ST_CRC_ERR;
 496                         if ((token & 0x40) == 0x40)
 497                                 dev->status |= USB_ST_STALLED;
 498                         break;
 499                 }
 500                 dev->act_len = length - ((token >> 16) & 0x7fff);
 501         } else {
 502                 dev->act_len = 0;
 503                 debug("dev=%u, usbsts=%#x, p[1]=%#x, p[2]=%#x\n",
 504                       dev->devnum, ehci_readl(&hcor->or_usbsts),
 505                       ehci_readl(&hcor->or_portsc[0]),
 506                       ehci_readl(&hcor->or_portsc[1]));
 507         }
 508
 509         return (dev->status != USB_ST_NOT_PROC) ? 0 : -1;
 510
 511 fail:
 512         td = (void *)hc32_to_cpu(qh->qh_overlay.qt_next);
 513         while (td != (void *)QT_NEXT_TERMINATE) {
 514                 qh->qh_overlay.qt_next = td->qt_next;
 515                 ehci_free(td, sizeof(*td));
 516                 td = (void *)hc32_to_cpu(qh->qh_overlay.qt_next);
 517         }
 518         ehci_free(qh, sizeof(*qh));
 519         return -1;
 520 }
 521
 522 static inline int min3(int a, int b, int c)
 523 {
 524
 525         if (b < a)
 526                 a = b;
 527         if (c < a)
 528                 a = c;
 529         return a;
 530 }
 531
 532 int
 533 ehci_submit_root(struct usb_device *dev, unsigned long pipe, void *buffer,
 534                  int length, struct devrequest *req)
 535 {
 536         uint8_t tmpbuf[4];
 537         u16 typeReq;
 538         void *srcptr = NULL;
 539         int len, srclen;
 540         uint32_t reg;
 541         uint32_t *status_reg;
 542
 543         if (le16_to_cpu(req->index) > CONFIG_SYS_USB_EHCI_MAX_ROOT_PORTS) {
 544                 printf("The request port(%d) is not configured\n",
 545                         le16_to_cpu(req->index) - 1);
 546                 return -1;
 547         }
 548         status_reg = (uint32_t *)&hcor->or_portsc[
 549                                                 le16_to_cpu(req->index) - 1];
 550         srclen = 0;
 551
 552         debug("req=%u (%#x), type=%u (%#x), value=%u, index=%u\n",
 553               req->request, req->request,
 554               req->requesttype, req->requesttype,
 555               le16_to_cpu(req->value), le16_to_cpu(req->index));
 556
 557         typeReq = req->request | req->requesttype << 8;
 558
 559         switch (typeReq) {
 560         case DeviceRequest | USB_REQ_GET_DESCRIPTOR:
 561                 switch (le16_to_cpu(req->value) >> 8) {
 562                 case USB_DT_DEVICE:
 563                         debug("USB_DT_DEVICE request\n");
 564                         srcptr = &descriptor.device;
 565                         srclen = 0x12;
 566                         break;
 567                 case USB_DT_CONFIG:
 568                         debug("USB_DT_CONFIG config\n");
 569                         srcptr = &descriptor.config;
 570                         srclen = 0x19;
 571                         break;
 572                 case USB_DT_STRING:
 573                         debug("USB_DT_STRING config\n");
 574                         switch (le16_to_cpu(req->value) & 0xff) {
 575                         case 0: /* Language */
 576                                 srcptr = "\4\3\1\0";
 577                                 srclen = 4;
 578                                 break;
 579                         case 1: /* Vendor */
 580                                 srcptr = "\16\3u\0-\0b\0o\0o\0t\0";
 581                                 srclen = 14;
 582                                 break;
 583                         case 2: /* Product */
 584                                 srcptr = "\52\3E\0H\0C\0I\0 "
 585                                          "\0H\0o\0s\0t\0 "
 586                                          "\0C\0o\0n\0t\0r\0o\0l\0l\0e\0r\0";
 587                                 srclen = 42;
 588                                 break;
 589                         default:
 590                                 debug("unknown value DT_STRING %x\n",
 591                                         le16_to_cpu(req->value));
 592                                 goto unknown;
 593                         }
 594                         break;
 595                 default:
 596                         debug("unknown value %x\n", le16_to_cpu(req->value));
 597                         goto unknown;
 598                 }
 599                 break;
 600         case USB_REQ_GET_DESCRIPTOR | ((USB_DIR_IN | USB_RT_HUB) << 8):
 601                 switch (le16_to_cpu(req->value) >> 8) {
 602                 case USB_DT_HUB:
 603                         debug("USB_DT_HUB config\n");
 604                         srcptr = &descriptor.hub;
 605                         srclen = 0x8;
 606                         break;
 607                 default:
 608                         debug("unknown value %x\n", le16_to_cpu(req->value));
 609                         goto unknown;
 610                 }
 611                 break;
 612         case USB_REQ_SET_ADDRESS | (USB_RECIP_DEVICE << 8):
 613                 debug("USB_REQ_SET_ADDRESS\n");
 614                 rootdev = le16_to_cpu(req->value);
 615                 break;
 616         case DeviceOutRequest | USB_REQ_SET_CONFIGURATION:
 617                 debug("USB_REQ_SET_CONFIGURATION\n");
 618                 /* Nothing to do */
 619                 break;
 620         case USB_REQ_GET_STATUS | ((USB_DIR_IN | USB_RT_HUB) << 8):
 621                 tmpbuf[0] = 1;  /* USB_STATUS_SELFPOWERED */
 622                 tmpbuf[1] = 0;
 623                 srcptr = tmpbuf;
 624                 srclen = 2;
 625                 break;
 626         case USB_REQ_GET_STATUS | ((USB_RT_PORT | USB_DIR_IN) << 8):
 627                 memset(tmpbuf, 0, 4);
 628                 reg = ehci_readl(status_reg);
 629                 if (reg & EHCI_PS_CS)
 630                         tmpbuf[0] |= USB_PORT_STAT_CONNECTION;
 631                 if (reg & EHCI_PS_PE)
 632                         tmpbuf[0] |= USB_PORT_STAT_ENABLE;
 633                 if (reg & EHCI_PS_SUSP)
 634                         tmpbuf[0] |= USB_PORT_STAT_SUSPEND;
 635                 if (reg & EHCI_PS_OCA)
 636                         tmpbuf[0] |= USB_PORT_STAT_OVERCURRENT;
 637                 if (reg & EHCI_PS_PR)
 638                         tmpbuf[0] |= USB_PORT_STAT_RESET;
 639                 if (reg & EHCI_PS_PP)
 640                         tmpbuf[1] |= USB_PORT_STAT_POWER >> 8;
 641
 642                 if (ehci_is_TDI()) {
 643                         switch ((reg >> 26) & 3) {
 644                         case 0:
 645                                 break;
 646                         case 1:
 647                                 tmpbuf[1] |= USB_PORT_STAT_LOW_SPEED >> 8;
 648                                 break;
 649                         case 2:
 650                         default:
 651                                 tmpbuf[1] |= USB_PORT_STAT_HIGH_SPEED >> 8;
 652                                 break;
 653                         }
 654                 } else {
 655                         tmpbuf[1] |= USB_PORT_STAT_HIGH_SPEED >> 8;
 656                 }
 657
 658                 if (reg & EHCI_PS_CSC)
 659                         tmpbuf[2] |= USB_PORT_STAT_C_CONNECTION;
 660                 if (reg & EHCI_PS_PEC)
 661                         tmpbuf[2] |= USB_PORT_STAT_C_ENABLE;
 662                 if (reg & EHCI_PS_OCC)
 663                         tmpbuf[2] |= USB_PORT_STAT_C_OVERCURRENT;
 664                 if (portreset & (1 << le16_to_cpu(req->index)))
 665                         tmpbuf[2] |= USB_PORT_STAT_C_RESET;
 666
 667                 srcptr = tmpbuf;
 668                 srclen = 4;
 669                 break;
 670         case USB_REQ_SET_FEATURE | ((USB_DIR_OUT | USB_RT_PORT) << 8):
 671                 reg = ehci_readl(status_reg);
 672                 reg &= ~EHCI_PS_CLEAR;
 673                 switch (le16_to_cpu(req->value)) {
 674                 case USB_PORT_FEAT_ENABLE:
 675                         reg |= EHCI_PS_PE;
 676                         ehci_writel(status_reg, reg);
 677                         break;
 678                 case USB_PORT_FEAT_POWER:
 679                         if (HCS_PPC(ehci_readl(&hccr->cr_hcsparams))) {
 680                                 reg |= EHCI_PS_PP;
 681                                 ehci_writel(status_reg, reg);
 682                         }
 683                         break;
 684                 case USB_PORT_FEAT_RESET:
 685                         if ((reg & (EHCI_PS_PE | EHCI_PS_CS)) == EHCI_PS_CS &&
 686                             !ehci_is_TDI() &&
 687                             EHCI_PS_IS_LOWSPEED(reg)) {
 688                                 /* Low speed device, give up ownership. */
 689                                 debug("port %d low speed --> companion\n",
 690                                       req->index - 1);
 691                                 reg |= EHCI_PS_PO;
 692                                 ehci_writel(status_reg, reg);
 693                                 break;
 694                         } else {
 695                                 int ret;
 696
 697                                 reg |= EHCI_PS_PR;
 698                                 reg &= ~EHCI_PS_PE;
 699                                 ehci_writel(status_reg, reg);
 700                                 /*
 701                                  * caller must wait, then call GetPortStatus
 702                                  * usb 2.0 specification say 50 ms resets on
 703                                  * root
 704                                  */
 705                                 wait_ms(50);
 706                                 /* terminate the reset */
 707                                 ehci_writel(status_reg, reg & ~EHCI_PS_PR);
 708                                 /*
 709                                  * A host controller must terminate the reset
 710                                  * and stabilize the state of the port within
 711                                  * 2 milliseconds
 712                                  */
 713                                 ret = handshake(status_reg, EHCI_PS_PR, 0,
 714                                                 2 * 1000);
 715                                 if (!ret)
 716                                         portreset |=
 717                                                 1 << le16_to_cpu(req->index);
 718                                 else
 719                                         printf("port(%d) reset error\n",
 720                                         le16_to_cpu(req->index) - 1);
 721                         }
 722                         break;
 723                 default:
 724                         debug("unknown feature %x\n", le16_to_cpu(req->value));
 725                         goto unknown;
 726                 }
 727                 /* unblock posted writes */
 728                 (void) ehci_readl(&hcor->or_usbcmd);
 729                 break;
 730         case USB_REQ_CLEAR_FEATURE | ((USB_DIR_OUT | USB_RT_PORT) << 8):
 731                 reg = ehci_readl(status_reg);
 732                 switch (le16_to_cpu(req->value)) {
 733                 case USB_PORT_FEAT_ENABLE:
 734                         reg &= ~EHCI_PS_PE;
 735                         break;
 736                 case USB_PORT_FEAT_C_ENABLE:
 737                         reg = (reg & ~EHCI_PS_CLEAR) | EHCI_PS_PE;
 738                         break;
 739                 case USB_PORT_FEAT_POWER:
 740                         if (HCS_PPC(ehci_readl(&hccr->cr_hcsparams)))
 741                                 reg = reg & ~(EHCI_PS_CLEAR | EHCI_PS_PP);
 742                 case USB_PORT_FEAT_C_CONNECTION:
 743                         reg = (reg & ~EHCI_PS_CLEAR) | EHCI_PS_CSC;
 744                         break;
 745                 case USB_PORT_FEAT_OVER_CURRENT:
 746                         reg = (reg & ~EHCI_PS_CLEAR) | EHCI_PS_OCC;
 747                         break;
 748                 case USB_PORT_FEAT_C_RESET:
 749                         portreset &= ~(1 << le16_to_cpu(req->index));
 750                         break;
 751                 default:
 752                         debug("unknown feature %x\n", le16_to_cpu(req->value));
 753                         goto unknown;
 754                 }
 755                 ehci_writel(status_reg, reg);
 756                 /* unblock posted write */
 757                 (void) ehci_readl(&hcor->or_usbcmd);
 758                 break;
 759         default:
 760                 debug("Unknown request\n");
 761                 goto unknown;
 762         }
 763
 764         wait_ms(1);
 765         len = min3(srclen, le16_to_cpu(req->length), length);
 766         if (srcptr != NULL && len > 0)
 767                 memcpy(buffer, srcptr, len);
 768         else
 769                 debug("Len is 0\n");
 770
 771         dev->act_len = len;
 772         dev->status = 0;
 773         return 0;
 774
 775 unknown:
 776         debug("requesttype=%x, request=%x, value=%x, index=%x, length=%x\n",
 777               req->requesttype, req->request, le16_to_cpu(req->value),
 778               le16_to_cpu(req->index), le16_to_cpu(req->length));
 779
 780         dev->act_len = 0;
 781         dev->status = USB_ST_STALLED;
 782         return -1;
 783 }
 784
 785 int usb_lowlevel_stop(void)
 786 {
 787         return ehci_hcd_stop();
 788 }
 789
 790 int usb_lowlevel_init(void)
 791 {
 792         uint32_t reg;
 793         uint32_t cmd;
 794
 795         if (ehci_hcd_init() != 0)
 796                 return -1;
 797
 798         /* EHCI spec section 4.1 */
 799         if (ehci_reset() != 0)
 800                 return -1;
 801
 802 #if defined(CONFIG_EHCI_HCD_INIT_AFTER_RESET)
 803         if (ehci_hcd_init() != 0)
 804                 return -1;
 805 #endif
 806
 807         /* Set head of reclaim list */
 808         memset(&qh_list, 0, sizeof(qh_list));
 809         qh_list.qh_link = cpu_to_hc32((uint32_t)&qh_list | QH_LINK_TYPE_QH);
 810         qh_list.qh_endpt1 = cpu_to_hc32((1 << 15) | (USB_SPEED_HIGH << 12));
 811         qh_list.qh_curtd = cpu_to_hc32(QT_NEXT_TERMINATE);
 812         qh_list.qh_overlay.qt_next = cpu_to_hc32(QT_NEXT_TERMINATE);
 813         qh_list.qh_overlay.qt_altnext = cpu_to_hc32(QT_NEXT_TERMINATE);
 814         qh_list.qh_overlay.qt_token = cpu_to_hc32(0x40);
 815
 816         /* Set async. queue head pointer. */
 817         ehci_writel(&hcor->or_asynclistaddr, (uint32_t)&qh_list);
 818
 819         reg = ehci_readl(&hccr->cr_hcsparams);
 820         descriptor.hub.bNbrPorts = HCS_N_PORTS(reg);
 821         printf("Register %x NbrPorts %d\n", reg, descriptor.hub.bNbrPorts);
 822         /* Port Indicators */
 823         if (HCS_INDICATOR(reg))
 824                 descriptor.hub.wHubCharacteristics |= 0x80;
 825         /* Port Power Control */
 826         if (HCS_PPC(reg))
 827                 descriptor.hub.wHubCharacteristics |= 0x01;
 828
 829         /* Start the host controller. */
 830         cmd = ehci_readl(&hcor->or_usbcmd);
 831         /*
 832          * Philips, Intel, and maybe others need CMD_RUN before the
 833          * root hub will detect new devices (why?); NEC doesn't
 834          */
 835         cmd &= ~(CMD_LRESET|CMD_IAAD|CMD_PSE|CMD_ASE|CMD_RESET);
 836         cmd |= CMD_RUN;
 837         ehci_writel(&hcor->or_usbcmd, cmd);
 838
 839         /* take control over the ports */
 840         cmd = ehci_readl(&hcor->or_configflag);
 841         cmd |= FLAG_CF;
 842         ehci_writel(&hcor->or_configflag, cmd);
 843         /* unblock posted write */
 844         cmd = ehci_readl(&hcor->or_usbcmd);
 845         wait_ms(5);
 846         reg = HC_VERSION(ehci_readl(&hccr->cr_capbase));
 847         printf("USB EHCI %x.%02x\n", reg >> 8, reg & 0xff);
 848
 849         rootdev = 0;
 850
 851         return 0;
 852 }
 853
 854 int
 855 submit_bulk_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
 856                 int length)
 857 {
 858
 859         if (usb_pipetype(pipe) != PIPE_BULK) {
 860                 debug("non-bulk pipe (type=%lu)", usb_pipetype(pipe));
 861                 return -1;
 862         }
 863         return ehci_submit_async(dev, pipe, buffer, length, NULL);
 864 }
 865
 866 int
 867 submit_control_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
 868                    int length, struct devrequest *setup)
 869 {
 870
 871         if (usb_pipetype(pipe) != PIPE_CONTROL) {
 872                 debug("non-control pipe (type=%lu)", usb_pipetype(pipe));
 873                 return -1;
 874         }
 875
 876         if (usb_pipedevice(pipe) == rootdev) {
 877                 if (rootdev == 0)
 878                         dev->speed = USB_SPEED_HIGH;
 879                 return ehci_submit_root(dev, pipe, buffer, length, setup);
 880         }
 881         return ehci_submit_async(dev, pipe, buffer, length, setup);
 882 }
 883
 884 int
 885 submit_int_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
 886                int length, int interval)
 887 {
 888
 889         debug("dev=%p, pipe=%lu, buffer=%p, length=%d, interval=%d",
 890               dev, pipe, buffer, length, interval);
 891         return -1;
 892 }