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 <errno.h>
  25 #include <asm/byteorder.h>
  26 #include <asm/unaligned.h>
  27 #include <usb.h>
  28 #include <asm/io.h>
  29 #include <malloc.h>
  30 #include <watchdog.h>
  31 #include <linux/compiler.h>
  32
  33 #include "ehci.h"
  34
  35 #ifndef CONFIG_USB_MAX_CONTROLLER_COUNT
  36 #define CONFIG_USB_MAX_CONTROLLER_COUNT 1
  37 #endif
  38
  39 /*
  40  * EHCI spec page 20 says that the HC may take up to 16 uFrames (= 4ms) to halt.
  41  * Let's time out after 8 to have a little safety margin on top of that.
  42  */
  43 #define HCHALT_TIMEOUT (8 * 1000)
  44
  45 static struct ehci_ctrl ehcic[CONFIG_USB_MAX_CONTROLLER_COUNT];
  46
  47 #define ALIGN_END_ADDR(type, ptr, size)                 \
  48         ((uint32_t)(ptr) + roundup((size) * sizeof(type), USB_DMA_MINALIGN))
  49
  50 static struct descriptor {
  51         struct usb_hub_descriptor hub;
  52         struct usb_device_descriptor device;
  53         struct usb_linux_config_descriptor config;
  54         struct usb_linux_interface_descriptor interface;
  55         struct usb_endpoint_descriptor endpoint;
  56 }  __attribute__ ((packed)) descriptor = {
  57         {
  58                 0x8,            /* bDescLength */
  59                 0x29,           /* bDescriptorType: hub descriptor */
  60                 2,              /* bNrPorts -- runtime modified */
  61                 0,              /* wHubCharacteristics */
  62                 10,             /* bPwrOn2PwrGood */
  63                 0,              /* bHubCntrCurrent */
  64                 {},             /* Device removable */
  65                 {}              /* at most 7 ports! XXX */
  66         },
  67         {
  68                 0x12,           /* bLength */
  69                 1,              /* bDescriptorType: UDESC_DEVICE */
  70                 cpu_to_le16(0x0200), /* bcdUSB: v2.0 */
  71                 9,              /* bDeviceClass: UDCLASS_HUB */
  72                 0,              /* bDeviceSubClass: UDSUBCLASS_HUB */
  73                 1,              /* bDeviceProtocol: UDPROTO_HSHUBSTT */
  74                 64,             /* bMaxPacketSize: 64 bytes */
  75                 0x0000,         /* idVendor */
  76                 0x0000,         /* idProduct */
  77                 cpu_to_le16(0x0100), /* bcdDevice */
  78                 1,              /* iManufacturer */
  79                 2,              /* iProduct */
  80                 0,              /* iSerialNumber */
  81                 1               /* bNumConfigurations: 1 */
  82         },
  83         {
  84                 0x9,
  85                 2,              /* bDescriptorType: UDESC_CONFIG */
  86                 cpu_to_le16(0x19),
  87                 1,              /* bNumInterface */
  88                 1,              /* bConfigurationValue */
  89                 0,              /* iConfiguration */
  90                 0x40,           /* bmAttributes: UC_SELF_POWER */
  91                 0               /* bMaxPower */
  92         },
  93         {
  94                 0x9,            /* bLength */
  95                 4,              /* bDescriptorType: UDESC_INTERFACE */
  96                 0,              /* bInterfaceNumber */
  97                 0,              /* bAlternateSetting */
  98                 1,              /* bNumEndpoints */
  99                 9,              /* bInterfaceClass: UICLASS_HUB */
 100                 0,              /* bInterfaceSubClass: UISUBCLASS_HUB */
 101                 0,              /* bInterfaceProtocol: UIPROTO_HSHUBSTT */
 102                 0               /* iInterface */
 103         },
 104         {
 105                 0x7,            /* bLength */
 106                 5,              /* bDescriptorType: UDESC_ENDPOINT */
 107                 0x81,           /* bEndpointAddress:
 108                                  * UE_DIR_IN | EHCI_INTR_ENDPT
 109                                  */
 110                 3,              /* bmAttributes: UE_INTERRUPT */
 111                 8,              /* wMaxPacketSize */
 112                 255             /* bInterval */
 113         },
 114 };
 115
 116 #if defined(CONFIG_EHCI_IS_TDI)
 117 #define ehci_is_TDI()   (1)
 118 #else
 119 #define ehci_is_TDI()   (0)
 120 #endif
 121
 122 int __ehci_get_port_speed(struct ehci_hcor *hcor, uint32_t reg)
 123 {
 124         return PORTSC_PSPD(reg);
 125 }
 126
 127 int ehci_get_port_speed(struct ehci_hcor *hcor, uint32_t reg)
 128         __attribute__((weak, alias("__ehci_get_port_speed")));
 129
 130 void __ehci_set_usbmode(int index)
 131 {
 132         uint32_t tmp;
 133         uint32_t *reg_ptr;
 134
 135         reg_ptr = (uint32_t *)((u8 *)&ehcic[index].hcor->or_usbcmd + USBMODE);
 136         tmp = ehci_readl(reg_ptr);
 137         tmp |= USBMODE_CM_HC;
 138 #if defined(CONFIG_EHCI_MMIO_BIG_ENDIAN)
 139         tmp |= USBMODE_BE;
 140 #endif
 141         ehci_writel(reg_ptr, tmp);
 142 }
 143
 144 void ehci_set_usbmode(int index)
 145         __attribute__((weak, alias("__ehci_set_usbmode")));
 146
 147 void __ehci_powerup_fixup(uint32_t *status_reg, uint32_t *reg)
 148 {
 149         mdelay(50);
 150 }
 151
 152 void ehci_powerup_fixup(uint32_t *status_reg, uint32_t *reg)
 153         __attribute__((weak, alias("__ehci_powerup_fixup")));
 154
 155 static int handshake(uint32_t *ptr, uint32_t mask, uint32_t done, int usec)
 156 {
 157         uint32_t result;
 158         do {
 159                 result = ehci_readl(ptr);
 160                 udelay(5);
 161                 if (result == ~(uint32_t)0)
 162                         return -1;
 163                 result &= mask;
 164                 if (result == done)
 165                         return 0;
 166                 usec--;
 167         } while (usec > 0);
 168         return -1;
 169 }
 170
 171 static int ehci_reset(int index)
 172 {
 173         uint32_t cmd;
 174         int ret = 0;
 175
 176         cmd = ehci_readl(&ehcic[index].hcor->or_usbcmd);
 177         cmd = (cmd & ~CMD_RUN) | CMD_RESET;
 178         ehci_writel(&ehcic[index].hcor->or_usbcmd, cmd);
 179         ret = handshake((uint32_t *)&ehcic[index].hcor->or_usbcmd,
 180                         CMD_RESET, 0, 250 * 1000);
 181         if (ret < 0) {
 182                 printf("EHCI fail to reset\n");
 183                 goto out;
 184         }
 185
 186         if (ehci_is_TDI())
 187                 ehci_set_usbmode(index);
 188
 189 #ifdef CONFIG_USB_EHCI_TXFIFO_THRESH
 190         cmd = ehci_readl(&ehcic[index].hcor->or_txfilltuning);
 191         cmd &= ~TXFIFO_THRESH_MASK;
 192         cmd |= TXFIFO_THRESH(CONFIG_USB_EHCI_TXFIFO_THRESH);
 193         ehci_writel(&ehcic[index].hcor->or_txfilltuning, cmd);
 194 #endif
 195 out:
 196         return ret;
 197 }
 198
 199 static int ehci_shutdown(struct ehci_ctrl *ctrl)
 200 {
 201         int i, ret = 0;
 202         uint32_t cmd, reg;
 203
 204         if (!ctrl || !ctrl->hcor)
 205                 return -EINVAL;
 206
 207         cmd = ehci_readl(&ctrl->hcor->or_usbcmd);
 208         cmd &= ~(CMD_PSE | CMD_ASE);
 209         ehci_writel(&ctrl->hcor->or_usbcmd, cmd);
 210         ret = handshake(&ctrl->hcor->or_usbsts, STS_ASS | STS_PSS, 0,
 211                 100 * 1000);
 212
 213         if (!ret) {
 214                 for (i = 0; i < CONFIG_SYS_USB_EHCI_MAX_ROOT_PORTS; i++) {
 215                         reg = ehci_readl(&ctrl->hcor->or_portsc[i]);
 216                         reg |= EHCI_PS_SUSP;
 217                         ehci_writel(&ctrl->hcor->or_portsc[i], reg);
 218                 }
 219
 220                 cmd &= ~CMD_RUN;
 221                 ehci_writel(&ctrl->hcor->or_usbcmd, cmd);
 222                 ret = handshake(&ctrl->hcor->or_usbsts, STS_HALT, STS_HALT,
 223                         HCHALT_TIMEOUT);
 224         }
 225
 226         if (ret)
 227                 puts("EHCI failed to shut down host controller.\n");
 228
 229         return ret;
 230 }
 231
 232 static int ehci_td_buffer(struct qTD *td, void *buf, size_t sz)
 233 {
 234         uint32_t delta, next;
 235         uint32_t addr = (uint32_t)buf;
 236         int idx;
 237
 238         if (addr != ALIGN(addr, ARCH_DMA_MINALIGN))
 239                 debug("EHCI-HCD: Misaligned buffer address (%p)\n", buf);
 240
 241         flush_dcache_range(addr, ALIGN(addr + sz, ARCH_DMA_MINALIGN));
 242
 243         idx = 0;
 244         while (idx < QT_BUFFER_CNT) {
 245                 td->qt_buffer[idx] = cpu_to_hc32(addr);
 246                 td->qt_buffer_hi[idx] = 0;
 247                 next = (addr + EHCI_PAGE_SIZE) & ~(EHCI_PAGE_SIZE - 1);
 248                 delta = next - addr;
 249                 if (delta >= sz)
 250                         break;
 251                 sz -= delta;
 252                 addr = next;
 253                 idx++;
 254         }
 255
 256         if (idx == QT_BUFFER_CNT) {
 257                 printf("out of buffer pointers (%u bytes left)\n", sz);
 258                 return -1;
 259         }
 260
 261         return 0;
 262 }
 263
 264 static inline u8 ehci_encode_speed(enum usb_device_speed speed)
 265 {
 266         #define QH_HIGH_SPEED   2
 267         #define QH_FULL_SPEED   0
 268         #define QH_LOW_SPEED    1
 269         if (speed == USB_SPEED_HIGH)
 270                 return QH_HIGH_SPEED;
 271         if (speed == USB_SPEED_LOW)
 272                 return QH_LOW_SPEED;
 273         return QH_FULL_SPEED;
 274 }
 275
 276 static void ehci_update_endpt2_dev_n_port(struct usb_device *dev,
 277                                           struct QH *qh)
 278 {
 279         struct usb_device *ttdev;
 280
 281         if (dev->speed != USB_SPEED_LOW && dev->speed != USB_SPEED_FULL)
 282                 return;
 283
 284         /*
 285          * For full / low speed devices we need to get the devnum and portnr of
 286          * the tt, so of the first upstream usb-2 hub, there may be usb-1 hubs
 287          * in the tree before that one!
 288          */
 289         ttdev = dev;
 290         while (ttdev->parent && ttdev->parent->speed != USB_SPEED_HIGH)
 291                 ttdev = ttdev->parent;
 292         if (!ttdev->parent)
 293                 return;
 294
 295         qh->qh_endpt2 |= cpu_to_hc32(QH_ENDPT2_PORTNUM(ttdev->portnr) |
 296                                      QH_ENDPT2_HUBADDR(ttdev->parent->devnum));
 297 }
 298
 299 static int
 300 ehci_submit_async(struct usb_device *dev, unsigned long pipe, void *buffer,
 301                    int length, struct devrequest *req)
 302 {
 303         ALLOC_ALIGN_BUFFER(struct QH, qh, 1, USB_DMA_MINALIGN);
 304         struct qTD *qtd;
 305         int qtd_count = 0;
 306         int qtd_counter = 0;
 307         volatile struct qTD *vtd;
 308         unsigned long ts;
 309         uint32_t *tdp;
 310         uint32_t endpt, maxpacket, token, usbsts;
 311         uint32_t c, toggle;
 312         uint32_t cmd;
 313         int timeout;
 314         int ret = 0;
 315         struct ehci_ctrl *ctrl = dev->controller;
 316
 317         debug("dev=%p, pipe=%lx, buffer=%p, length=%d, req=%p\n", dev, pipe,
 318               buffer, length, req);
 319         if (req != NULL)
 320                 debug("req=%u (%#x), type=%u (%#x), value=%u (%#x), index=%u\n",
 321                       req->request, req->request,
 322                       req->requesttype, req->requesttype,
 323                       le16_to_cpu(req->value), le16_to_cpu(req->value),
 324                       le16_to_cpu(req->index));
 325
 326 #define PKT_ALIGN       512
 327         /*
 328          * The USB transfer is split into qTD transfers. Eeach qTD transfer is
 329          * described by a transfer descriptor (the qTD). The qTDs form a linked
 330          * list with a queue head (QH).
 331          *
 332          * Each qTD transfer starts with a new USB packet, i.e. a packet cannot
 333          * have its beginning in a qTD transfer and its end in the following
 334          * one, so the qTD transfer lengths have to be chosen accordingly.
 335          *
 336          * Each qTD transfer uses up to QT_BUFFER_CNT data buffers, mapped to
 337          * single pages. The first data buffer can start at any offset within a
 338          * page (not considering the cache-line alignment issues), while the
 339          * following buffers must be page-aligned. There is no alignment
 340          * constraint on the size of a qTD transfer.
 341          */
 342         if (req != NULL)
 343                 /* 1 qTD will be needed for SETUP, and 1 for ACK. */
 344                 qtd_count += 1 + 1;
 345         if (length > 0 || req == NULL) {
 346                 /*
 347                  * Determine the qTD transfer size that will be used for the
 348                  * data payload (not considering the first qTD transfer, which
 349                  * may be longer or shorter, and the final one, which may be
 350                  * shorter).
 351                  *
 352                  * In order to keep each packet within a qTD transfer, the qTD
 353                  * transfer size is aligned to PKT_ALIGN, which is a multiple of
 354                  * wMaxPacketSize (except in some cases for interrupt transfers,
 355                  * see comment in submit_int_msg()).
 356                  *
 357                  * By default, i.e. if the input buffer is aligned to PKT_ALIGN,
 358                  * QT_BUFFER_CNT full pages will be used.
 359                  */
 360                 int xfr_sz = QT_BUFFER_CNT;
 361                 /*
 362                  * However, if the input buffer is not aligned to PKT_ALIGN, the
 363                  * qTD transfer size will be one page shorter, and the first qTD
 364                  * data buffer of each transfer will be page-unaligned.
 365                  */
 366                 if ((uint32_t)buffer & (PKT_ALIGN - 1))
 367                         xfr_sz--;
 368                 /* Convert the qTD transfer size to bytes. */
 369                 xfr_sz *= EHCI_PAGE_SIZE;
 370                 /*
 371                  * Approximate by excess the number of qTDs that will be
 372                  * required for the data payload. The exact formula is way more
 373                  * complicated and saves at most 2 qTDs, i.e. a total of 128
 374                  * bytes.
 375                  */
 376                 qtd_count += 2 + length / xfr_sz;
 377         }
 378 /*
 379  * Threshold value based on the worst-case total size of the allocated qTDs for
 380  * a mass-storage transfer of 65535 blocks of 512 bytes.
 381  */
 382 #if CONFIG_SYS_MALLOC_LEN <= 64 + 128 * 1024
 383 #warning CONFIG_SYS_MALLOC_LEN may be too small for EHCI
 384 #endif
 385         qtd = memalign(USB_DMA_MINALIGN, qtd_count * sizeof(struct qTD));
 386         if (qtd == NULL) {
 387                 printf("unable to allocate TDs\n");
 388                 return -1;
 389         }
 390
 391         memset(qh, 0, sizeof(struct QH));
 392         memset(qtd, 0, qtd_count * sizeof(*qtd));
 393
 394         toggle = usb_gettoggle(dev, usb_pipeendpoint(pipe), usb_pipeout(pipe));
 395
 396         /*
 397          * Setup QH (3.6 in ehci-r10.pdf)
 398          *
 399          *   qh_link ................. 03-00 H
 400          *   qh_endpt1 ............... 07-04 H
 401          *   qh_endpt2 ............... 0B-08 H
 402          * - qh_curtd
 403          *   qh_overlay.qt_next ...... 13-10 H
 404          * - qh_overlay.qt_altnext
 405          */
 406         qh->qh_link = cpu_to_hc32((uint32_t)&ctrl->qh_list | QH_LINK_TYPE_QH);
 407         c = (dev->speed != USB_SPEED_HIGH) && !usb_pipeendpoint(pipe);
 408         maxpacket = usb_maxpacket(dev, pipe);
 409         endpt = QH_ENDPT1_RL(8) | QH_ENDPT1_C(c) |
 410                 QH_ENDPT1_MAXPKTLEN(maxpacket) | QH_ENDPT1_H(0) |
 411                 QH_ENDPT1_DTC(QH_ENDPT1_DTC_DT_FROM_QTD) |
 412                 QH_ENDPT1_EPS(ehci_encode_speed(dev->speed)) |
 413                 QH_ENDPT1_ENDPT(usb_pipeendpoint(pipe)) | QH_ENDPT1_I(0) |
 414                 QH_ENDPT1_DEVADDR(usb_pipedevice(pipe));
 415         qh->qh_endpt1 = cpu_to_hc32(endpt);
 416         endpt = QH_ENDPT2_MULT(1) | QH_ENDPT2_UFCMASK(0) | QH_ENDPT2_UFSMASK(0);
 417         qh->qh_endpt2 = cpu_to_hc32(endpt);
 418         ehci_update_endpt2_dev_n_port(dev, qh);
 419         qh->qh_overlay.qt_next = cpu_to_hc32(QT_NEXT_TERMINATE);
 420         qh->qh_overlay.qt_altnext = cpu_to_hc32(QT_NEXT_TERMINATE);
 421
 422         tdp = &qh->qh_overlay.qt_next;
 423
 424         if (req != NULL) {
 425                 /*
 426                  * Setup request qTD (3.5 in ehci-r10.pdf)
 427                  *
 428                  *   qt_next ................ 03-00 H
 429                  *   qt_altnext ............. 07-04 H
 430                  *   qt_token ............... 0B-08 H
 431                  *
 432                  *   [ buffer, buffer_hi ] loaded with "req".
 433                  */
 434                 qtd[qtd_counter].qt_next = cpu_to_hc32(QT_NEXT_TERMINATE);
 435                 qtd[qtd_counter].qt_altnext = cpu_to_hc32(QT_NEXT_TERMINATE);
 436                 token = QT_TOKEN_DT(0) | QT_TOKEN_TOTALBYTES(sizeof(*req)) |
 437                         QT_TOKEN_IOC(0) | QT_TOKEN_CPAGE(0) | QT_TOKEN_CERR(3) |
 438                         QT_TOKEN_PID(QT_TOKEN_PID_SETUP) |
 439                         QT_TOKEN_STATUS(QT_TOKEN_STATUS_ACTIVE);
 440                 qtd[qtd_counter].qt_token = cpu_to_hc32(token);
 441                 if (ehci_td_buffer(&qtd[qtd_counter], req, sizeof(*req))) {
 442                         printf("unable to construct SETUP TD\n");
 443                         goto fail;
 444                 }
 445                 /* Update previous qTD! */
 446                 *tdp = cpu_to_hc32((uint32_t)&qtd[qtd_counter]);
 447                 tdp = &qtd[qtd_counter++].qt_next;
 448                 toggle = 1;
 449         }
 450
 451         if (length > 0 || req == NULL) {
 452                 uint8_t *buf_ptr = buffer;
 453                 int left_length = length;
 454
 455                 do {
 456                         /*
 457                          * Determine the size of this qTD transfer. By default,
 458                          * QT_BUFFER_CNT full pages can be used.
 459                          */
 460                         int xfr_bytes = QT_BUFFER_CNT * EHCI_PAGE_SIZE;
 461                         /*
 462                          * However, if the input buffer is not page-aligned, the
 463                          * portion of the first page before the buffer start
 464                          * offset within that page is unusable.
 465                          */
 466                         xfr_bytes -= (uint32_t)buf_ptr & (EHCI_PAGE_SIZE - 1);
 467                         /*
 468                          * In order to keep each packet within a qTD transfer,
 469                          * align the qTD transfer size to PKT_ALIGN.
 470                          */
 471                         xfr_bytes &= ~(PKT_ALIGN - 1);
 472                         /*
 473                          * This transfer may be shorter than the available qTD
 474                          * transfer size that has just been computed.
 475                          */
 476                         xfr_bytes = min(xfr_bytes, left_length);
 477
 478                         /*
 479                          * Setup request qTD (3.5 in ehci-r10.pdf)
 480                          *
 481                          *   qt_next ................ 03-00 H
 482                          *   qt_altnext ............. 07-04 H
 483                          *   qt_token ............... 0B-08 H
 484                          *
 485                          *   [ buffer, buffer_hi ] loaded with "buffer".
 486                          */
 487                         qtd[qtd_counter].qt_next =
 488                                         cpu_to_hc32(QT_NEXT_TERMINATE);
 489                         qtd[qtd_counter].qt_altnext =
 490                                         cpu_to_hc32(QT_NEXT_TERMINATE);
 491                         token = QT_TOKEN_DT(toggle) |
 492                                 QT_TOKEN_TOTALBYTES(xfr_bytes) |
 493                                 QT_TOKEN_IOC(req == NULL) | QT_TOKEN_CPAGE(0) |
 494                                 QT_TOKEN_CERR(3) |
 495                                 QT_TOKEN_PID(usb_pipein(pipe) ?
 496                                         QT_TOKEN_PID_IN : QT_TOKEN_PID_OUT) |
 497                                 QT_TOKEN_STATUS(QT_TOKEN_STATUS_ACTIVE);
 498                         qtd[qtd_counter].qt_token = cpu_to_hc32(token);
 499                         if (ehci_td_buffer(&qtd[qtd_counter], buf_ptr,
 500                                                 xfr_bytes)) {
 501                                 printf("unable to construct DATA TD\n");
 502                                 goto fail;
 503                         }
 504                         /* Update previous qTD! */
 505                         *tdp = cpu_to_hc32((uint32_t)&qtd[qtd_counter]);
 506                         tdp = &qtd[qtd_counter++].qt_next;
 507                         /*
 508                          * Data toggle has to be adjusted since the qTD transfer
 509                          * size is not always an even multiple of
 510                          * wMaxPacketSize.
 511                          */
 512                         if ((xfr_bytes / maxpacket) & 1)
 513                                 toggle ^= 1;
 514                         buf_ptr += xfr_bytes;
 515                         left_length -= xfr_bytes;
 516                 } while (left_length > 0);
 517         }
 518
 519         if (req != NULL) {
 520                 /*
 521                  * Setup request qTD (3.5 in ehci-r10.pdf)
 522                  *
 523                  *   qt_next ................ 03-00 H
 524                  *   qt_altnext ............. 07-04 H
 525                  *   qt_token ............... 0B-08 H
 526                  */
 527                 qtd[qtd_counter].qt_next = cpu_to_hc32(QT_NEXT_TERMINATE);
 528                 qtd[qtd_counter].qt_altnext = cpu_to_hc32(QT_NEXT_TERMINATE);
 529                 token = QT_TOKEN_DT(1) | QT_TOKEN_TOTALBYTES(0) |
 530                         QT_TOKEN_IOC(1) | QT_TOKEN_CPAGE(0) | QT_TOKEN_CERR(3) |
 531                         QT_TOKEN_PID(usb_pipein(pipe) ?
 532                                 QT_TOKEN_PID_OUT : QT_TOKEN_PID_IN) |
 533                         QT_TOKEN_STATUS(QT_TOKEN_STATUS_ACTIVE);
 534                 qtd[qtd_counter].qt_token = cpu_to_hc32(token);
 535                 /* Update previous qTD! */
 536                 *tdp = cpu_to_hc32((uint32_t)&qtd[qtd_counter]);
 537                 tdp = &qtd[qtd_counter++].qt_next;
 538         }
 539
 540         ctrl->qh_list.qh_link = cpu_to_hc32((uint32_t)qh | QH_LINK_TYPE_QH);
 541
 542         /* Flush dcache */
 543         flush_dcache_range((uint32_t)&ctrl->qh_list,
 544                 ALIGN_END_ADDR(struct QH, &ctrl->qh_list, 1));
 545         flush_dcache_range((uint32_t)qh, ALIGN_END_ADDR(struct QH, qh, 1));
 546         flush_dcache_range((uint32_t)qtd,
 547                            ALIGN_END_ADDR(struct qTD, qtd, qtd_count));
 548
 549         /* Set async. queue head pointer. */
 550         ehci_writel(&ctrl->hcor->or_asynclistaddr, (uint32_t)&ctrl->qh_list);
 551
 552         usbsts = ehci_readl(&ctrl->hcor->or_usbsts);
 553         ehci_writel(&ctrl->hcor->or_usbsts, (usbsts & 0x3f));
 554
 555         /* Enable async. schedule. */
 556         cmd = ehci_readl(&ctrl->hcor->or_usbcmd);
 557         cmd |= CMD_ASE;
 558         ehci_writel(&ctrl->hcor->or_usbcmd, cmd);
 559
 560         ret = handshake((uint32_t *)&ctrl->hcor->or_usbsts, STS_ASS, STS_ASS,
 561                         100 * 1000);
 562         if (ret < 0) {
 563                 printf("EHCI fail timeout STS_ASS set\n");
 564                 goto fail;
 565         }
 566
 567         /* Wait for TDs to be processed. */
 568         ts = get_timer(0);
 569         vtd = &qtd[qtd_counter - 1];
 570         timeout = USB_TIMEOUT_MS(pipe);
 571         do {
 572                 /* Invalidate dcache */
 573                 invalidate_dcache_range((uint32_t)&ctrl->qh_list,
 574                         ALIGN_END_ADDR(struct QH, &ctrl->qh_list, 1));
 575                 invalidate_dcache_range((uint32_t)qh,
 576                         ALIGN_END_ADDR(struct QH, qh, 1));
 577                 invalidate_dcache_range((uint32_t)qtd,
 578                         ALIGN_END_ADDR(struct qTD, qtd, qtd_count));
 579
 580                 token = hc32_to_cpu(vtd->qt_token);
 581                 if (!(QT_TOKEN_GET_STATUS(token) & QT_TOKEN_STATUS_ACTIVE))
 582                         break;
 583                 WATCHDOG_RESET();
 584         } while (get_timer(ts) < timeout);
 585
 586         /*
 587          * Invalidate the memory area occupied by buffer
 588          * Don't try to fix the buffer alignment, if it isn't properly
 589          * aligned it's upper layer's fault so let invalidate_dcache_range()
 590          * vow about it. But we have to fix the length as it's actual
 591          * transfer length and can be unaligned. This is potentially
 592          * dangerous operation, it's responsibility of the calling
 593          * code to make sure enough space is reserved.
 594          */
 595         invalidate_dcache_range((uint32_t)buffer,
 596                 ALIGN((uint32_t)buffer + length, ARCH_DMA_MINALIGN));
 597
 598         /* Check that the TD processing happened */
 599         if (QT_TOKEN_GET_STATUS(token) & QT_TOKEN_STATUS_ACTIVE)
 600                 printf("EHCI timed out on TD - token=%#x\n", token);
 601
 602         /* Disable async schedule. */
 603         cmd = ehci_readl(&ctrl->hcor->or_usbcmd);
 604         cmd &= ~CMD_ASE;
 605         ehci_writel(&ctrl->hcor->or_usbcmd, cmd);
 606
 607         ret = handshake((uint32_t *)&ctrl->hcor->or_usbsts, STS_ASS, 0,
 608                         100 * 1000);
 609         if (ret < 0) {
 610                 printf("EHCI fail timeout STS_ASS reset\n");
 611                 goto fail;
 612         }
 613
 614         token = hc32_to_cpu(qh->qh_overlay.qt_token);
 615         if (!(QT_TOKEN_GET_STATUS(token) & QT_TOKEN_STATUS_ACTIVE)) {
 616                 debug("TOKEN=%#x\n", token);
 617                 switch (QT_TOKEN_GET_STATUS(token) &
 618                         ~(QT_TOKEN_STATUS_SPLITXSTATE | QT_TOKEN_STATUS_PERR)) {
 619                 case 0:
 620                         toggle = QT_TOKEN_GET_DT(token);
 621                         usb_settoggle(dev, usb_pipeendpoint(pipe),
 622                                        usb_pipeout(pipe), toggle);
 623                         dev->status = 0;
 624                         break;
 625                 case QT_TOKEN_STATUS_HALTED:
 626                         dev->status = USB_ST_STALLED;
 627                         break;
 628                 case QT_TOKEN_STATUS_ACTIVE | QT_TOKEN_STATUS_DATBUFERR:
 629                 case QT_TOKEN_STATUS_DATBUFERR:
 630                         dev->status = USB_ST_BUF_ERR;
 631                         break;
 632                 case QT_TOKEN_STATUS_HALTED | QT_TOKEN_STATUS_BABBLEDET:
 633                 case QT_TOKEN_STATUS_BABBLEDET:
 634                         dev->status = USB_ST_BABBLE_DET;
 635                         break;
 636                 default:
 637                         dev->status = USB_ST_CRC_ERR;
 638                         if (QT_TOKEN_GET_STATUS(token) & QT_TOKEN_STATUS_HALTED)
 639                                 dev->status |= USB_ST_STALLED;
 640                         break;
 641                 }
 642                 dev->act_len = length - QT_TOKEN_GET_TOTALBYTES(token);
 643         } else {
 644                 dev->act_len = 0;
 645 #ifndef CONFIG_USB_EHCI_FARADAY
 646                 debug("dev=%u, usbsts=%#x, p[1]=%#x, p[2]=%#x\n",
 647                       dev->devnum, ehci_readl(&ctrl->hcor->or_usbsts),
 648                       ehci_readl(&ctrl->hcor->or_portsc[0]),
 649                       ehci_readl(&ctrl->hcor->or_portsc[1]));
 650 #endif
 651         }
 652
 653         free(qtd);
 654         return (dev->status != USB_ST_NOT_PROC) ? 0 : -1;
 655
 656 fail:
 657         free(qtd);
 658         return -1;
 659 }
 660
 661 __weak uint32_t *ehci_get_portsc_register(struct ehci_hcor *hcor, int port)
 662 {
 663         if (port < 0 || port >= CONFIG_SYS_USB_EHCI_MAX_ROOT_PORTS) {
 664                 /* Printing the message would cause a scan failure! */
 665                 debug("The request port(%u) is not configured\n", port);
 666                 return NULL;
 667         }
 668
 669         return (uint32_t *)&hcor->or_portsc[port];
 670 }
 671
 672 int
 673 ehci_submit_root(struct usb_device *dev, unsigned long pipe, void *buffer,
 674                  int length, struct devrequest *req)
 675 {
 676         uint8_t tmpbuf[4];
 677         u16 typeReq;
 678         void *srcptr = NULL;
 679         int len, srclen;
 680         uint32_t reg;
 681         uint32_t *status_reg;
 682         int port = le16_to_cpu(req->index) & 0xff;
 683         struct ehci_ctrl *ctrl = dev->controller;
 684
 685         srclen = 0;
 686
 687         debug("req=%u (%#x), type=%u (%#x), value=%u, index=%u\n",
 688               req->request, req->request,
 689               req->requesttype, req->requesttype,
 690               le16_to_cpu(req->value), le16_to_cpu(req->index));
 691
 692         typeReq = req->request | req->requesttype << 8;
 693
 694         switch (typeReq) {
 695         case USB_REQ_GET_STATUS | ((USB_RT_PORT | USB_DIR_IN) << 8):
 696         case USB_REQ_SET_FEATURE | ((USB_DIR_OUT | USB_RT_PORT) << 8):
 697         case USB_REQ_CLEAR_FEATURE | ((USB_DIR_OUT | USB_RT_PORT) << 8):
 698                 status_reg = ehci_get_portsc_register(ctrl->hcor, port - 1);
 699                 if (!status_reg)
 700                         return -1;
 701                 break;
 702         default:
 703                 status_reg = NULL;
 704                 break;
 705         }
 706
 707         switch (typeReq) {
 708         case DeviceRequest | USB_REQ_GET_DESCRIPTOR:
 709                 switch (le16_to_cpu(req->value) >> 8) {
 710                 case USB_DT_DEVICE:
 711                         debug("USB_DT_DEVICE request\n");
 712                         srcptr = &descriptor.device;
 713                         srclen = descriptor.device.bLength;
 714                         break;
 715                 case USB_DT_CONFIG:
 716                         debug("USB_DT_CONFIG config\n");
 717                         srcptr = &descriptor.config;
 718                         srclen = descriptor.config.bLength +
 719                                         descriptor.interface.bLength +
 720                                         descriptor.endpoint.bLength;
 721                         break;
 722                 case USB_DT_STRING:
 723                         debug("USB_DT_STRING config\n");
 724                         switch (le16_to_cpu(req->value) & 0xff) {
 725                         case 0: /* Language */
 726                                 srcptr = "\4\3\1\0";
 727                                 srclen = 4;
 728                                 break;
 729                         case 1: /* Vendor */
 730                                 srcptr = "\16\3u\0-\0b\0o\0o\0t\0";
 731                                 srclen = 14;
 732                                 break;
 733                         case 2: /* Product */
 734                                 srcptr = "\52\3E\0H\0C\0I\0 "
 735                                          "\0H\0o\0s\0t\0 "
 736                                          "\0C\0o\0n\0t\0r\0o\0l\0l\0e\0r\0";
 737                                 srclen = 42;
 738                                 break;
 739                         default:
 740                                 debug("unknown value DT_STRING %x\n",
 741                                         le16_to_cpu(req->value));
 742                                 goto unknown;
 743                         }
 744                         break;
 745                 default:
 746                         debug("unknown value %x\n", le16_to_cpu(req->value));
 747                         goto unknown;
 748                 }
 749                 break;
 750         case USB_REQ_GET_DESCRIPTOR | ((USB_DIR_IN | USB_RT_HUB) << 8):
 751                 switch (le16_to_cpu(req->value) >> 8) {
 752                 case USB_DT_HUB:
 753                         debug("USB_DT_HUB config\n");
 754                         srcptr = &descriptor.hub;
 755                         srclen = descriptor.hub.bLength;
 756                         break;
 757                 default:
 758                         debug("unknown value %x\n", le16_to_cpu(req->value));
 759                         goto unknown;
 760                 }
 761                 break;
 762         case USB_REQ_SET_ADDRESS | (USB_RECIP_DEVICE << 8):
 763                 debug("USB_REQ_SET_ADDRESS\n");
 764                 ctrl->rootdev = le16_to_cpu(req->value);
 765                 break;
 766         case DeviceOutRequest | USB_REQ_SET_CONFIGURATION:
 767                 debug("USB_REQ_SET_CONFIGURATION\n");
 768                 /* Nothing to do */
 769                 break;
 770         case USB_REQ_GET_STATUS | ((USB_DIR_IN | USB_RT_HUB) << 8):
 771                 tmpbuf[0] = 1;  /* USB_STATUS_SELFPOWERED */
 772                 tmpbuf[1] = 0;
 773                 srcptr = tmpbuf;
 774                 srclen = 2;
 775                 break;
 776         case USB_REQ_GET_STATUS | ((USB_RT_PORT | USB_DIR_IN) << 8):
 777                 memset(tmpbuf, 0, 4);
 778                 reg = ehci_readl(status_reg);
 779                 if (reg & EHCI_PS_CS)
 780                         tmpbuf[0] |= USB_PORT_STAT_CONNECTION;
 781                 if (reg & EHCI_PS_PE)
 782                         tmpbuf[0] |= USB_PORT_STAT_ENABLE;
 783                 if (reg & EHCI_PS_SUSP)
 784                         tmpbuf[0] |= USB_PORT_STAT_SUSPEND;
 785                 if (reg & EHCI_PS_OCA)
 786                         tmpbuf[0] |= USB_PORT_STAT_OVERCURRENT;
 787                 if (reg & EHCI_PS_PR)
 788                         tmpbuf[0] |= USB_PORT_STAT_RESET;
 789                 if (reg & EHCI_PS_PP)
 790                         tmpbuf[1] |= USB_PORT_STAT_POWER >> 8;
 791
 792                 if (ehci_is_TDI()) {
 793                         switch (ehci_get_port_speed(ctrl->hcor, reg)) {
 794                         case PORTSC_PSPD_FS:
 795                                 break;
 796                         case PORTSC_PSPD_LS:
 797                                 tmpbuf[1] |= USB_PORT_STAT_LOW_SPEED >> 8;
 798                                 break;
 799                         case PORTSC_PSPD_HS:
 800                         default:
 801                                 tmpbuf[1] |= USB_PORT_STAT_HIGH_SPEED >> 8;
 802                                 break;
 803                         }
 804                 } else {
 805                         tmpbuf[1] |= USB_PORT_STAT_HIGH_SPEED >> 8;
 806                 }
 807
 808                 if (reg & EHCI_PS_CSC)
 809                         tmpbuf[2] |= USB_PORT_STAT_C_CONNECTION;
 810                 if (reg & EHCI_PS_PEC)
 811                         tmpbuf[2] |= USB_PORT_STAT_C_ENABLE;
 812                 if (reg & EHCI_PS_OCC)
 813                         tmpbuf[2] |= USB_PORT_STAT_C_OVERCURRENT;
 814                 if (ctrl->portreset & (1 << port))
 815                         tmpbuf[2] |= USB_PORT_STAT_C_RESET;
 816
 817                 srcptr = tmpbuf;
 818                 srclen = 4;
 819                 break;
 820         case USB_REQ_SET_FEATURE | ((USB_DIR_OUT | USB_RT_PORT) << 8):
 821                 reg = ehci_readl(status_reg);
 822                 reg &= ~EHCI_PS_CLEAR;
 823                 switch (le16_to_cpu(req->value)) {
 824                 case USB_PORT_FEAT_ENABLE:
 825                         reg |= EHCI_PS_PE;
 826                         ehci_writel(status_reg, reg);
 827                         break;
 828                 case USB_PORT_FEAT_POWER:
 829                         if (HCS_PPC(ehci_readl(&ctrl->hccr->cr_hcsparams))) {
 830                                 reg |= EHCI_PS_PP;
 831                                 ehci_writel(status_reg, reg);
 832                         }
 833                         break;
 834                 case USB_PORT_FEAT_RESET:
 835                         if ((reg & (EHCI_PS_PE | EHCI_PS_CS)) == EHCI_PS_CS &&
 836                             !ehci_is_TDI() &&
 837                             EHCI_PS_IS_LOWSPEED(reg)) {
 838                                 /* Low speed device, give up ownership. */
 839                                 debug("port %d low speed --> companion\n",
 840                                       port - 1);
 841                                 reg |= EHCI_PS_PO;
 842                                 ehci_writel(status_reg, reg);
 843                                 break;
 844                         } else {
 845                                 int ret;
 846
 847                                 reg |= EHCI_PS_PR;
 848                                 reg &= ~EHCI_PS_PE;
 849                                 ehci_writel(status_reg, reg);
 850                                 /*
 851                                  * caller must wait, then call GetPortStatus
 852                                  * usb 2.0 specification say 50 ms resets on
 853                                  * root
 854                                  */
 855                                 ehci_powerup_fixup(status_reg, &reg);
 856
 857                                 ehci_writel(status_reg, reg & ~EHCI_PS_PR);
 858                                 /*
 859                                  * A host controller must terminate the reset
 860                                  * and stabilize the state of the port within
 861                                  * 2 milliseconds
 862                                  */
 863                                 ret = handshake(status_reg, EHCI_PS_PR, 0,
 864                                                 2 * 1000);
 865                                 if (!ret)
 866                                         ctrl->portreset |= 1 << port;
 867                                 else
 868                                         printf("port(%d) reset error\n",
 869                                                port - 1);
 870                         }
 871                         break;
 872                 case USB_PORT_FEAT_TEST:
 873                         ehci_shutdown(ctrl);
 874                         reg &= ~(0xf << 16);
 875                         reg |= ((le16_to_cpu(req->index) >> 8) & 0xf) << 16;
 876                         ehci_writel(status_reg, reg);
 877                         break;
 878                 default:
 879                         debug("unknown feature %x\n", le16_to_cpu(req->value));
 880                         goto unknown;
 881                 }
 882                 /* unblock posted writes */
 883                 (void) ehci_readl(&ctrl->hcor->or_usbcmd);
 884                 break;
 885         case USB_REQ_CLEAR_FEATURE | ((USB_DIR_OUT | USB_RT_PORT) << 8):
 886                 reg = ehci_readl(status_reg);
 887                 reg &= ~EHCI_PS_CLEAR;
 888                 switch (le16_to_cpu(req->value)) {
 889                 case USB_PORT_FEAT_ENABLE:
 890                         reg &= ~EHCI_PS_PE;
 891                         break;
 892                 case USB_PORT_FEAT_C_ENABLE:
 893                         reg |= EHCI_PS_PE;
 894                         break;
 895                 case USB_PORT_FEAT_POWER:
 896                         if (HCS_PPC(ehci_readl(&ctrl->hccr->cr_hcsparams)))
 897                                 reg &= ~EHCI_PS_PP;
 898                         break;
 899                 case USB_PORT_FEAT_C_CONNECTION:
 900                         reg |= EHCI_PS_CSC;
 901                         break;
 902                 case USB_PORT_FEAT_OVER_CURRENT:
 903                         reg |= EHCI_PS_OCC;
 904                         break;
 905                 case USB_PORT_FEAT_C_RESET:
 906                         ctrl->portreset &= ~(1 << port);
 907                         break;
 908                 default:
 909                         debug("unknown feature %x\n", le16_to_cpu(req->value));
 910                         goto unknown;
 911                 }
 912                 ehci_writel(status_reg, reg);
 913                 /* unblock posted write */
 914                 (void) ehci_readl(&ctrl->hcor->or_usbcmd);
 915                 break;
 916         default:
 917                 debug("Unknown request\n");
 918                 goto unknown;
 919         }
 920
 921         mdelay(1);
 922         len = min3(srclen, le16_to_cpu(req->length), length);
 923         if (srcptr != NULL && len > 0)
 924                 memcpy(buffer, srcptr, len);
 925         else
 926                 debug("Len is 0\n");
 927
 928         dev->act_len = len;
 929         dev->status = 0;
 930         return 0;
 931
 932 unknown:
 933         debug("requesttype=%x, request=%x, value=%x, index=%x, length=%x\n",
 934               req->requesttype, req->request, le16_to_cpu(req->value),
 935               le16_to_cpu(req->index), le16_to_cpu(req->length));
 936
 937         dev->act_len = 0;
 938         dev->status = USB_ST_STALLED;
 939         return -1;
 940 }
 941
 942 int usb_lowlevel_stop(int index)
 943 {
 944         ehci_shutdown(&ehcic[index]);
 945         return ehci_hcd_stop(index);
 946 }
 947
 948 int usb_lowlevel_init(int index, enum usb_init_type init, void **controller)
 949 {
 950         uint32_t reg;
 951         uint32_t cmd;
 952         struct QH *qh_list;
 953         struct QH *periodic;
 954         int i;
 955         int rc;
 956
 957         rc = ehci_hcd_init(index, init, &ehcic[index].hccr, &ehcic[index].hcor);
 958         if (rc)
 959                 return rc;
 960         if (init == USB_INIT_DEVICE)
 961                 goto done;
 962
 963         /* EHCI spec section 4.1 */
 964         if (ehci_reset(index))
 965                 return -1;
 966
 967 #if defined(CONFIG_EHCI_HCD_INIT_AFTER_RESET)
 968         rc = ehci_hcd_init(index, init, &ehcic[index].hccr, &ehcic[index].hcor);
 969         if (rc)
 970                 return rc;
 971 #endif
 972         /* Set the high address word (aka segment) for 64-bit controller */
 973         if (ehci_readl(&ehcic[index].hccr->cr_hccparams) & 1)
 974                 ehci_writel(&ehcic[index].hcor->or_ctrldssegment, 0);
 975
 976         qh_list = &ehcic[index].qh_list;
 977
 978         /* Set head of reclaim list */
 979         memset(qh_list, 0, sizeof(*qh_list));
 980         qh_list->qh_link = cpu_to_hc32((uint32_t)qh_list | QH_LINK_TYPE_QH);
 981         qh_list->qh_endpt1 = cpu_to_hc32(QH_ENDPT1_H(1) |
 982                                                 QH_ENDPT1_EPS(USB_SPEED_HIGH));
 983         qh_list->qh_curtd = cpu_to_hc32(QT_NEXT_TERMINATE);
 984         qh_list->qh_overlay.qt_next = cpu_to_hc32(QT_NEXT_TERMINATE);
 985         qh_list->qh_overlay.qt_altnext = cpu_to_hc32(QT_NEXT_TERMINATE);
 986         qh_list->qh_overlay.qt_token =
 987                         cpu_to_hc32(QT_TOKEN_STATUS(QT_TOKEN_STATUS_HALTED));
 988
 989         flush_dcache_range((uint32_t)qh_list,
 990                            ALIGN_END_ADDR(struct QH, qh_list, 1));
 991
 992         /* Set async. queue head pointer. */
 993         ehci_writel(&ehcic[index].hcor->or_asynclistaddr, (uint32_t)qh_list);
 994
 995         /*
 996          * Set up periodic list
 997          * Step 1: Parent QH for all periodic transfers.
 998          */
 999         periodic = &ehcic[index].periodic_queue;
1000         memset(periodic, 0, sizeof(*periodic));
1001         periodic->qh_link = cpu_to_hc32(QH_LINK_TERMINATE);
1002         periodic->qh_overlay.qt_next = cpu_to_hc32(QT_NEXT_TERMINATE);
1003         periodic->qh_overlay.qt_altnext = cpu_to_hc32(QT_NEXT_TERMINATE);
1004
1005         flush_dcache_range((uint32_t)periodic,
1006                            ALIGN_END_ADDR(struct QH, periodic, 1));
1007
1008         /*
1009          * Step 2: Setup frame-list: Every microframe, USB tries the same list.
1010          *         In particular, device specifications on polling frequency
1011          *         are disregarded. Keyboards seem to send NAK/NYet reliably
1012          *         when polled with an empty buffer.
1013          *
1014          *         Split Transactions will be spread across microframes using
1015          *         S-mask and C-mask.
1016          */
1017         if (ehcic[index].periodic_list == NULL)
1018                 ehcic[index].periodic_list = memalign(4096, 1024 * 4);
1019
1020         if (!ehcic[index].periodic_list)
1021                 return -ENOMEM;
1022         for (i = 0; i < 1024; i++) {
1023                 ehcic[index].periodic_list[i] = cpu_to_hc32((uint32_t)periodic
1024                                                 | QH_LINK_TYPE_QH);
1025         }
1026
1027         flush_dcache_range((uint32_t)ehcic[index].periodic_list,
1028                            ALIGN_END_ADDR(uint32_t, ehcic[index].periodic_list,
1029                                           1024));
1030
1031         /* Set periodic list base address */
1032         ehci_writel(&ehcic[index].hcor->or_periodiclistbase,
1033                 (uint32_t)ehcic[index].periodic_list);
1034
1035         reg = ehci_readl(&ehcic[index].hccr->cr_hcsparams);
1036         descriptor.hub.bNbrPorts = HCS_N_PORTS(reg);
1037         debug("Register %x NbrPorts %d\n", reg, descriptor.hub.bNbrPorts);
1038         /* Port Indicators */
1039         if (HCS_INDICATOR(reg))
1040                 put_unaligned(get_unaligned(&descriptor.hub.wHubCharacteristics)
1041                                 | 0x80, &descriptor.hub.wHubCharacteristics);
1042         /* Port Power Control */
1043         if (HCS_PPC(reg))
1044                 put_unaligned(get_unaligned(&descriptor.hub.wHubCharacteristics)
1045                                 | 0x01, &descriptor.hub.wHubCharacteristics);
1046
1047         /* Start the host controller. */
1048         cmd = ehci_readl(&ehcic[index].hcor->or_usbcmd);
1049         /*
1050          * Philips, Intel, and maybe others need CMD_RUN before the
1051          * root hub will detect new devices (why?); NEC doesn't
1052          */
1053         cmd &= ~(CMD_LRESET|CMD_IAAD|CMD_PSE|CMD_ASE|CMD_RESET);
1054         cmd |= CMD_RUN;
1055         ehci_writel(&ehcic[index].hcor->or_usbcmd, cmd);
1056
1057 #ifndef CONFIG_USB_EHCI_FARADAY
1058         /* take control over the ports */
1059         cmd = ehci_readl(&ehcic[index].hcor->or_configflag);
1060         cmd |= FLAG_CF;
1061         ehci_writel(&ehcic[index].hcor->or_configflag, cmd);
1062 #endif
1063
1064         /* unblock posted write */
1065         cmd = ehci_readl(&ehcic[index].hcor->or_usbcmd);
1066         mdelay(5);
1067         reg = HC_VERSION(ehci_readl(&ehcic[index].hccr->cr_capbase));
1068         printf("USB EHCI %x.%02x\n", reg >> 8, reg & 0xff);
1069
1070         ehcic[index].rootdev = 0;
1071 done:
1072         *controller = &ehcic[index];
1073         return 0;
1074 }
1075
1076 int
1077 submit_bulk_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
1078                 int length)
1079 {
1080
1081         if (usb_pipetype(pipe) != PIPE_BULK) {
1082                 debug("non-bulk pipe (type=%lu)", usb_pipetype(pipe));
1083                 return -1;
1084         }
1085         return ehci_submit_async(dev, pipe, buffer, length, NULL);
1086 }
1087
1088 int
1089 submit_control_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
1090                    int length, struct devrequest *setup)
1091 {
1092         struct ehci_ctrl *ctrl = dev->controller;
1093
1094         if (usb_pipetype(pipe) != PIPE_CONTROL) {
1095                 debug("non-control pipe (type=%lu)", usb_pipetype(pipe));
1096                 return -1;
1097         }
1098
1099         if (usb_pipedevice(pipe) == ctrl->rootdev) {
1100                 if (!ctrl->rootdev)
1101                         dev->speed = USB_SPEED_HIGH;
1102                 return ehci_submit_root(dev, pipe, buffer, length, setup);
1103         }
1104         return ehci_submit_async(dev, pipe, buffer, length, setup);
1105 }
1106
1107 struct int_queue {
1108         struct QH *first;
1109         struct QH *current;
1110         struct QH *last;
1111         struct qTD *tds;
1112 };
1113
1114 #define NEXT_QH(qh) (struct QH *)(hc32_to_cpu((qh)->qh_link) & ~0x1f)
1115
1116 static int
1117 enable_periodic(struct ehci_ctrl *ctrl)
1118 {
1119         uint32_t cmd;
1120         struct ehci_hcor *hcor = ctrl->hcor;
1121         int ret;
1122
1123         cmd = ehci_readl(&hcor->or_usbcmd);
1124         cmd |= CMD_PSE;
1125         ehci_writel(&hcor->or_usbcmd, cmd);
1126
1127         ret = handshake((uint32_t *)&hcor->or_usbsts,
1128                         STS_PSS, STS_PSS, 100 * 1000);
1129         if (ret < 0) {
1130                 printf("EHCI failed: timeout when enabling periodic list\n");
1131                 return -ETIMEDOUT;
1132         }
1133         udelay(1000);
1134         return 0;
1135 }
1136
1137 static int
1138 disable_periodic(struct ehci_ctrl *ctrl)
1139 {
1140         uint32_t cmd;
1141         struct ehci_hcor *hcor = ctrl->hcor;
1142         int ret;
1143
1144         cmd = ehci_readl(&hcor->or_usbcmd);
1145         cmd &= ~CMD_PSE;
1146         ehci_writel(&hcor->or_usbcmd, cmd);
1147
1148         ret = handshake((uint32_t *)&hcor->or_usbsts,
1149                         STS_PSS, 0, 100 * 1000);
1150         if (ret < 0) {
1151                 printf("EHCI failed: timeout when disabling periodic list\n");
1152                 return -ETIMEDOUT;
1153         }
1154         return 0;
1155 }
1156
1157 static int periodic_schedules;
1158
1159 struct int_queue *
1160 create_int_queue(struct usb_device *dev, unsigned long pipe, int queuesize,
1161                  int elementsize, void *buffer)
1162 {
1163         struct ehci_ctrl *ctrl = dev->controller;
1164         struct int_queue *result = NULL;
1165         int i;
1166
1167         debug("Enter create_int_queue\n");
1168         if (usb_pipetype(pipe) != PIPE_INTERRUPT) {
1169                 debug("non-interrupt pipe (type=%lu)", usb_pipetype(pipe));
1170                 return NULL;
1171         }
1172
1173         /* limit to 4 full pages worth of data -
1174          * we can safely fit them in a single TD,
1175          * no matter the alignment
1176          */
1177         if (elementsize >= 16384) {
1178                 debug("too large elements for interrupt transfers\n");
1179                 return NULL;
1180         }
1181
1182         result = malloc(sizeof(*result));
1183         if (!result) {
1184                 debug("ehci intr queue: out of memory\n");
1185                 goto fail1;
1186         }
1187         result->first = memalign(USB_DMA_MINALIGN,
1188                                  sizeof(struct QH) * queuesize);
1189         if (!result->first) {
1190                 debug("ehci intr queue: out of memory\n");
1191                 goto fail2;
1192         }
1193         result->current = result->first;
1194         result->last = result->first + queuesize - 1;
1195         result->tds = memalign(USB_DMA_MINALIGN,
1196                                sizeof(struct qTD) * queuesize);
1197         if (!result->tds) {
1198                 debug("ehci intr queue: out of memory\n");
1199                 goto fail3;
1200         }
1201         memset(result->first, 0, sizeof(struct QH) * queuesize);
1202         memset(result->tds, 0, sizeof(struct qTD) * queuesize);
1203
1204         for (i = 0; i < queuesize; i++) {
1205                 struct QH *qh = result->first + i;
1206                 struct qTD *td = result->tds + i;
1207                 void **buf = &qh->buffer;
1208
1209                 qh->qh_link = cpu_to_hc32((uint32_t)(qh+1) | QH_LINK_TYPE_QH);
1210                 if (i == queuesize - 1)
1211                         qh->qh_link = cpu_to_hc32(QH_LINK_TERMINATE);
1212
1213                 qh->qh_overlay.qt_next = cpu_to_hc32((uint32_t)td);
1214                 qh->qh_overlay.qt_altnext = cpu_to_hc32(QT_NEXT_TERMINATE);
1215                 qh->qh_endpt1 =
1216                         cpu_to_hc32((0 << 28) | /* No NAK reload (ehci 4.9) */
1217                         (usb_maxpacket(dev, pipe) << 16) | /* MPS */
1218                         (1 << 14) |
1219                         QH_ENDPT1_EPS(ehci_encode_speed(dev->speed)) |
1220                         (usb_pipeendpoint(pipe) << 8) | /* Endpoint Number */
1221                         (usb_pipedevice(pipe) << 0));
1222                 qh->qh_endpt2 = cpu_to_hc32((1 << 30) | /* 1 Tx per mframe */
1223                         (1 << 0)); /* S-mask: microframe 0 */
1224                 if (dev->speed == USB_SPEED_LOW ||
1225                                 dev->speed == USB_SPEED_FULL) {
1226                         /* C-mask: microframes 2-4 */
1227                         qh->qh_endpt2 |= cpu_to_hc32((0x1c << 8));
1228                 }
1229                 ehci_update_endpt2_dev_n_port(dev, qh);
1230
1231                 td->qt_next = cpu_to_hc32(QT_NEXT_TERMINATE);
1232                 td->qt_altnext = cpu_to_hc32(QT_NEXT_TERMINATE);
1233                 debug("communication direction is '%s'\n",
1234                       usb_pipein(pipe) ? "in" : "out");
1235                 td->qt_token = cpu_to_hc32((elementsize << 16) |
1236                         ((usb_pipein(pipe) ? 1 : 0) << 8) | /* IN/OUT token */
1237                         0x80); /* active */
1238                 td->qt_buffer[0] =
1239                     cpu_to_hc32((uint32_t)buffer + i * elementsize);
1240                 td->qt_buffer[1] =
1241                     cpu_to_hc32((td->qt_buffer[0] + 0x1000) & ~0xfff);
1242                 td->qt_buffer[2] =
1243                     cpu_to_hc32((td->qt_buffer[0] + 0x2000) & ~0xfff);
1244                 td->qt_buffer[3] =
1245                     cpu_to_hc32((td->qt_buffer[0] + 0x3000) & ~0xfff);
1246                 td->qt_buffer[4] =
1247                     cpu_to_hc32((td->qt_buffer[0] + 0x4000) & ~0xfff);
1248
1249                 *buf = buffer + i * elementsize;
1250         }
1251
1252         flush_dcache_range((uint32_t)buffer,
1253                            ALIGN_END_ADDR(char, buffer,
1254                                           queuesize * elementsize));
1255         flush_dcache_range((uint32_t)result->first,
1256                            ALIGN_END_ADDR(struct QH, result->first,
1257                                           queuesize));
1258         flush_dcache_range((uint32_t)result->tds,
1259                            ALIGN_END_ADDR(struct qTD, result->tds,
1260                                           queuesize));
1261
1262         if (disable_periodic(ctrl) < 0) {
1263                 debug("FATAL: periodic should never fail, but did");
1264                 goto fail3;
1265         }
1266
1267         /* hook up to periodic list */
1268         struct QH *list = &ctrl->periodic_queue;
1269         result->last->qh_link = list->qh_link;
1270         list->qh_link = cpu_to_hc32((uint32_t)result->first | QH_LINK_TYPE_QH);
1271
1272         flush_dcache_range((uint32_t)result->last,
1273                            ALIGN_END_ADDR(struct QH, result->last, 1));
1274         flush_dcache_range((uint32_t)list,
1275                            ALIGN_END_ADDR(struct QH, list, 1));
1276
1277         if (enable_periodic(ctrl) < 0) {
1278                 debug("FATAL: periodic should never fail, but did");
1279                 goto fail3;
1280         }
1281         periodic_schedules++;
1282
1283         debug("Exit create_int_queue\n");
1284         return result;
1285 fail3:
1286         if (result->tds)
1287                 free(result->tds);
1288 fail2:
1289         if (result->first)
1290                 free(result->first);
1291         if (result)
1292                 free(result);
1293 fail1:
1294         return NULL;
1295 }
1296
1297 void *poll_int_queue(struct usb_device *dev, struct int_queue *queue)
1298 {
1299         struct QH *cur = queue->current;
1300         struct qTD *cur_td;
1301
1302         /* depleted queue */
1303         if (cur == NULL) {
1304                 debug("Exit poll_int_queue with completed queue\n");
1305                 return NULL;
1306         }
1307         /* still active */
1308         cur_td = &queue->tds[queue->current - queue->first];
1309         invalidate_dcache_range((uint32_t)cur_td,
1310                                 ALIGN_END_ADDR(struct qTD, cur_td, 1));
1311         if (QT_TOKEN_GET_STATUS(hc32_to_cpu(cur_td->qt_token)) &
1312                         QT_TOKEN_STATUS_ACTIVE) {
1313                 debug("Exit poll_int_queue with no completed intr transfer. token is %x\n",
1314                       hc32_to_cpu(cur_td->qt_token));
1315                 return NULL;
1316         }
1317         if (!(cur->qh_link & QH_LINK_TERMINATE))
1318                 queue->current++;
1319         else
1320                 queue->current = NULL;
1321         debug("Exit poll_int_queue with completed intr transfer. token is %x at %p (first at %p)\n",
1322               hc32_to_cpu(cur_td->qt_token), cur, queue->first);
1323         return cur->buffer;
1324 }
1325
1326 /* Do not free buffers associated with QHs, they're owned by someone else */
1327 int
1328 destroy_int_queue(struct usb_device *dev, struct int_queue *queue)
1329 {
1330         struct ehci_ctrl *ctrl = dev->controller;
1331         int result = -1;
1332         unsigned long timeout;
1333
1334         if (disable_periodic(ctrl) < 0) {
1335                 debug("FATAL: periodic should never fail, but did");
1336                 goto out;
1337         }
1338         periodic_schedules--;
1339
1340         struct QH *cur = &ctrl->periodic_queue;
1341         timeout = get_timer(0) + 500; /* abort after 500ms */
1342         while (!(cur->qh_link & cpu_to_hc32(QH_LINK_TERMINATE))) {
1343                 debug("considering %p, with qh_link %x\n", cur, cur->qh_link);
1344                 if (NEXT_QH(cur) == queue->first) {
1345                         debug("found candidate. removing from chain\n");
1346                         cur->qh_link = queue->last->qh_link;
1347                         flush_dcache_range((uint32_t)cur,
1348                                            ALIGN_END_ADDR(struct QH, cur, 1));
1349                         result = 0;
1350                         break;
1351                 }
1352                 cur = NEXT_QH(cur);
1353                 if (get_timer(0) > timeout) {
1354                         printf("Timeout destroying interrupt endpoint queue\n");
1355                         result = -1;
1356                         goto out;
1357                 }
1358         }
1359
1360         if (periodic_schedules > 0) {
1361                 result = enable_periodic(ctrl);
1362                 if (result < 0)
1363                         debug("FATAL: periodic should never fail, but did");
1364         }
1365
1366 out:
1367         free(queue->tds);
1368         free(queue->first);
1369         free(queue);
1370
1371         return result;
1372 }
1373
1374 int
1375 submit_int_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
1376                int length, int interval)
1377 {
1378         void *backbuffer;
1379         struct int_queue *queue;
1380         unsigned long timeout;
1381         int result = 0, ret;
1382
1383         debug("dev=%p, pipe=%lu, buffer=%p, length=%d, interval=%d",
1384               dev, pipe, buffer, length, interval);
1385
1386         /*
1387          * Interrupt transfers requiring several transactions are not supported
1388          * because bInterval is ignored.
1389          *
1390          * Also, ehci_submit_async() relies on wMaxPacketSize being a power of 2
1391          * <= PKT_ALIGN if several qTDs are required, while the USB
1392          * specification does not constrain this for interrupt transfers. That
1393          * means that ehci_submit_async() would support interrupt transfers
1394          * requiring several transactions only as long as the transfer size does
1395          * not require more than a single qTD.
1396          */
1397         if (length > usb_maxpacket(dev, pipe)) {
1398                 printf("%s: Interrupt transfers requiring several "
1399                         "transactions are not supported.\n", __func__);
1400                 return -1;
1401         }
1402
1403         queue = create_int_queue(dev, pipe, 1, length, buffer);
1404
1405         timeout = get_timer(0) + USB_TIMEOUT_MS(pipe);
1406         while ((backbuffer = poll_int_queue(dev, queue)) == NULL)
1407                 if (get_timer(0) > timeout) {
1408                         printf("Timeout poll on interrupt endpoint\n");
1409                         result = -ETIMEDOUT;
1410                         break;
1411                 }
1412
1413         if (backbuffer != buffer) {
1414                 debug("got wrong buffer back (%x instead of %x)\n",
1415                       (uint32_t)backbuffer, (uint32_t)buffer);
1416                 return -EINVAL;
1417         }
1418
1419         invalidate_dcache_range((uint32_t)buffer,
1420                                 ALIGN_END_ADDR(char, buffer, length));
1421
1422         ret = destroy_int_queue(dev, queue);
1423         if (ret < 0)
1424                 return ret;
1425
1426         /* everything worked out fine */
1427         return result;
1428 }