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 static struct ehci_ctrl {
  40         struct ehci_hccr *hccr; /* R/O registers, not need for volatile */
  41         struct ehci_hcor *hcor;
  42         int rootdev;
  43         uint16_t portreset;
  44         struct QH qh_list __aligned(USB_DMA_MINALIGN);
  45         struct QH periodic_queue __aligned(USB_DMA_MINALIGN);
  46         uint32_t *periodic_list;
  47         int ntds;
  48 } ehcic[CONFIG_USB_MAX_CONTROLLER_COUNT];
  49
  50 #define ALIGN_END_ADDR(type, ptr, size)                 \
  51         ((uint32_t)(ptr) + roundup((size) * sizeof(type), USB_DMA_MINALIGN))
  52
  53 static struct descriptor {
  54         struct usb_hub_descriptor hub;
  55         struct usb_device_descriptor device;
  56         struct usb_linux_config_descriptor config;
  57         struct usb_linux_interface_descriptor interface;
  58         struct usb_endpoint_descriptor endpoint;
  59 }  __attribute__ ((packed)) descriptor = {
  60         {
  61                 0x8,            /* bDescLength */
  62                 0x29,           /* bDescriptorType: hub descriptor */
  63                 2,              /* bNrPorts -- runtime modified */
  64                 0,              /* wHubCharacteristics */
  65                 10,             /* bPwrOn2PwrGood */
  66                 0,              /* bHubCntrCurrent */
  67                 {},             /* Device removable */
  68                 {}              /* at most 7 ports! XXX */
  69         },
  70         {
  71                 0x12,           /* bLength */
  72                 1,              /* bDescriptorType: UDESC_DEVICE */
  73                 cpu_to_le16(0x0200), /* bcdUSB: v2.0 */
  74                 9,              /* bDeviceClass: UDCLASS_HUB */
  75                 0,              /* bDeviceSubClass: UDSUBCLASS_HUB */
  76                 1,              /* bDeviceProtocol: UDPROTO_HSHUBSTT */
  77                 64,             /* bMaxPacketSize: 64 bytes */
  78                 0x0000,         /* idVendor */
  79                 0x0000,         /* idProduct */
  80                 cpu_to_le16(0x0100), /* bcdDevice */
  81                 1,              /* iManufacturer */
  82                 2,              /* iProduct */
  83                 0,              /* iSerialNumber */
  84                 1               /* bNumConfigurations: 1 */
  85         },
  86         {
  87                 0x9,
  88                 2,              /* bDescriptorType: UDESC_CONFIG */
  89                 cpu_to_le16(0x19),
  90                 1,              /* bNumInterface */
  91                 1,              /* bConfigurationValue */
  92                 0,              /* iConfiguration */
  93                 0x40,           /* bmAttributes: UC_SELF_POWER */
  94                 0               /* bMaxPower */
  95         },
  96         {
  97                 0x9,            /* bLength */
  98                 4,              /* bDescriptorType: UDESC_INTERFACE */
  99                 0,              /* bInterfaceNumber */
 100                 0,              /* bAlternateSetting */
 101                 1,              /* bNumEndpoints */
 102                 9,              /* bInterfaceClass: UICLASS_HUB */
 103                 0,              /* bInterfaceSubClass: UISUBCLASS_HUB */
 104                 0,              /* bInterfaceProtocol: UIPROTO_HSHUBSTT */
 105                 0               /* iInterface */
 106         },
 107         {
 108                 0x7,            /* bLength */
 109                 5,              /* bDescriptorType: UDESC_ENDPOINT */
 110                 0x81,           /* bEndpointAddress:
 111                                  * UE_DIR_IN | EHCI_INTR_ENDPT
 112                                  */
 113                 3,              /* bmAttributes: UE_INTERRUPT */
 114                 8,              /* wMaxPacketSize */
 115                 255             /* bInterval */
 116         },
 117 };
 118
 119 #if defined(CONFIG_EHCI_IS_TDI)
 120 #define ehci_is_TDI()   (1)
 121 #else
 122 #define ehci_is_TDI()   (0)
 123 #endif
 124
 125 int __ehci_get_port_speed(struct ehci_hcor *hcor, uint32_t reg)
 126 {
 127         return PORTSC_PSPD(reg);
 128 }
 129
 130 int ehci_get_port_speed(struct ehci_hcor *hcor, uint32_t reg)
 131         __attribute__((weak, alias("__ehci_get_port_speed")));
 132
 133 void __ehci_set_usbmode(int index)
 134 {
 135         uint32_t tmp;
 136         uint32_t *reg_ptr;
 137
 138         reg_ptr = (uint32_t *)((u8 *)&ehcic[index].hcor->or_usbcmd + USBMODE);
 139         tmp = ehci_readl(reg_ptr);
 140         tmp |= USBMODE_CM_HC;
 141 #if defined(CONFIG_EHCI_MMIO_BIG_ENDIAN)
 142         tmp |= USBMODE_BE;
 143 #endif
 144         ehci_writel(reg_ptr, tmp);
 145 }
 146
 147 void ehci_set_usbmode(int index)
 148         __attribute__((weak, alias("__ehci_set_usbmode")));
 149
 150 void __ehci_powerup_fixup(uint32_t *status_reg, uint32_t *reg)
 151 {
 152         mdelay(50);
 153 }
 154
 155 void ehci_powerup_fixup(uint32_t *status_reg, uint32_t *reg)
 156         __attribute__((weak, alias("__ehci_powerup_fixup")));
 157
 158 static int handshake(uint32_t *ptr, uint32_t mask, uint32_t done, int usec)
 159 {
 160         uint32_t result;
 161         do {
 162                 result = ehci_readl(ptr);
 163                 udelay(5);
 164                 if (result == ~(uint32_t)0)
 165                         return -1;
 166                 result &= mask;
 167                 if (result == done)
 168                         return 0;
 169                 usec--;
 170         } while (usec > 0);
 171         return -1;
 172 }
 173
 174 static int ehci_reset(int index)
 175 {
 176         uint32_t cmd;
 177         int ret = 0;
 178
 179         cmd = ehci_readl(&ehcic[index].hcor->or_usbcmd);
 180         cmd = (cmd & ~CMD_RUN) | CMD_RESET;
 181         ehci_writel(&ehcic[index].hcor->or_usbcmd, cmd);
 182         ret = handshake((uint32_t *)&ehcic[index].hcor->or_usbcmd,
 183                         CMD_RESET, 0, 250 * 1000);
 184         if (ret < 0) {
 185                 printf("EHCI fail to reset\n");
 186                 goto out;
 187         }
 188
 189         if (ehci_is_TDI())
 190                 ehci_set_usbmode(index);
 191
 192 #ifdef CONFIG_USB_EHCI_TXFIFO_THRESH
 193         cmd = ehci_readl(&ehcic[index].hcor->or_txfilltuning);
 194         cmd &= ~TXFIFO_THRESH_MASK;
 195         cmd |= TXFIFO_THRESH(CONFIG_USB_EHCI_TXFIFO_THRESH);
 196         ehci_writel(&ehcic[index].hcor->or_txfilltuning, cmd);
 197 #endif
 198 out:
 199         return ret;
 200 }
 201
 202 static int ehci_td_buffer(struct qTD *td, void *buf, size_t sz)
 203 {
 204         uint32_t delta, next;
 205         uint32_t addr = (uint32_t)buf;
 206         int idx;
 207
 208         if (addr != ALIGN(addr, ARCH_DMA_MINALIGN))
 209                 debug("EHCI-HCD: Misaligned buffer address (%p)\n", buf);
 210
 211         flush_dcache_range(addr, ALIGN(addr + sz, ARCH_DMA_MINALIGN));
 212
 213         idx = 0;
 214         while (idx < QT_BUFFER_CNT) {
 215                 td->qt_buffer[idx] = cpu_to_hc32(addr);
 216                 td->qt_buffer_hi[idx] = 0;
 217                 next = (addr + EHCI_PAGE_SIZE) & ~(EHCI_PAGE_SIZE - 1);
 218                 delta = next - addr;
 219                 if (delta >= sz)
 220                         break;
 221                 sz -= delta;
 222                 addr = next;
 223                 idx++;
 224         }
 225
 226         if (idx == QT_BUFFER_CNT) {
 227                 printf("out of buffer pointers (%u bytes left)\n", sz);
 228                 return -1;
 229         }
 230
 231         return 0;
 232 }
 233
 234 static inline u8 ehci_encode_speed(enum usb_device_speed speed)
 235 {
 236         #define QH_HIGH_SPEED   2
 237         #define QH_FULL_SPEED   0
 238         #define QH_LOW_SPEED    1
 239         if (speed == USB_SPEED_HIGH)
 240                 return QH_HIGH_SPEED;
 241         if (speed == USB_SPEED_LOW)
 242                 return QH_LOW_SPEED;
 243         return QH_FULL_SPEED;
 244 }
 245
 246 static int
 247 ehci_submit_async(struct usb_device *dev, unsigned long pipe, void *buffer,
 248                    int length, struct devrequest *req)
 249 {
 250         ALLOC_ALIGN_BUFFER(struct QH, qh, 1, USB_DMA_MINALIGN);
 251         struct qTD *qtd;
 252         int qtd_count = 0;
 253         int qtd_counter = 0;
 254         volatile struct qTD *vtd;
 255         unsigned long ts;
 256         uint32_t *tdp;
 257         uint32_t endpt, maxpacket, token, usbsts;
 258         uint32_t c, toggle;
 259         uint32_t cmd;
 260         int timeout;
 261         int ret = 0;
 262         struct ehci_ctrl *ctrl = dev->controller;
 263
 264         debug("dev=%p, pipe=%lx, buffer=%p, length=%d, req=%p\n", dev, pipe,
 265               buffer, length, req);
 266         if (req != NULL)
 267                 debug("req=%u (%#x), type=%u (%#x), value=%u (%#x), index=%u\n",
 268                       req->request, req->request,
 269                       req->requesttype, req->requesttype,
 270                       le16_to_cpu(req->value), le16_to_cpu(req->value),
 271                       le16_to_cpu(req->index));
 272
 273 #define PKT_ALIGN       512
 274         /*
 275          * The USB transfer is split into qTD transfers. Eeach qTD transfer is
 276          * described by a transfer descriptor (the qTD). The qTDs form a linked
 277          * list with a queue head (QH).
 278          *
 279          * Each qTD transfer starts with a new USB packet, i.e. a packet cannot
 280          * have its beginning in a qTD transfer and its end in the following
 281          * one, so the qTD transfer lengths have to be chosen accordingly.
 282          *
 283          * Each qTD transfer uses up to QT_BUFFER_CNT data buffers, mapped to
 284          * single pages. The first data buffer can start at any offset within a
 285          * page (not considering the cache-line alignment issues), while the
 286          * following buffers must be page-aligned. There is no alignment
 287          * constraint on the size of a qTD transfer.
 288          */
 289         if (req != NULL)
 290                 /* 1 qTD will be needed for SETUP, and 1 for ACK. */
 291                 qtd_count += 1 + 1;
 292         if (length > 0 || req == NULL) {
 293                 /*
 294                  * Determine the qTD transfer size that will be used for the
 295                  * data payload (not considering the first qTD transfer, which
 296                  * may be longer or shorter, and the final one, which may be
 297                  * shorter).
 298                  *
 299                  * In order to keep each packet within a qTD transfer, the qTD
 300                  * transfer size is aligned to PKT_ALIGN, which is a multiple of
 301                  * wMaxPacketSize (except in some cases for interrupt transfers,
 302                  * see comment in submit_int_msg()).
 303                  *
 304                  * By default, i.e. if the input buffer is aligned to PKT_ALIGN,
 305                  * QT_BUFFER_CNT full pages will be used.
 306                  */
 307                 int xfr_sz = QT_BUFFER_CNT;
 308                 /*
 309                  * However, if the input buffer is not aligned to PKT_ALIGN, the
 310                  * qTD transfer size will be one page shorter, and the first qTD
 311                  * data buffer of each transfer will be page-unaligned.
 312                  */
 313                 if ((uint32_t)buffer & (PKT_ALIGN - 1))
 314                         xfr_sz--;
 315                 /* Convert the qTD transfer size to bytes. */
 316                 xfr_sz *= EHCI_PAGE_SIZE;
 317                 /*
 318                  * Approximate by excess the number of qTDs that will be
 319                  * required for the data payload. The exact formula is way more
 320                  * complicated and saves at most 2 qTDs, i.e. a total of 128
 321                  * bytes.
 322                  */
 323                 qtd_count += 2 + length / xfr_sz;
 324         }
 325 /*
 326  * Threshold value based on the worst-case total size of the allocated qTDs for
 327  * a mass-storage transfer of 65535 blocks of 512 bytes.
 328  */
 329 #if CONFIG_SYS_MALLOC_LEN <= 64 + 128 * 1024
 330 #warning CONFIG_SYS_MALLOC_LEN may be too small for EHCI
 331 #endif
 332         qtd = memalign(USB_DMA_MINALIGN, qtd_count * sizeof(struct qTD));
 333         if (qtd == NULL) {
 334                 printf("unable to allocate TDs\n");
 335                 return -1;
 336         }
 337
 338         memset(qh, 0, sizeof(struct QH));
 339         memset(qtd, 0, qtd_count * sizeof(*qtd));
 340
 341         toggle = usb_gettoggle(dev, usb_pipeendpoint(pipe), usb_pipeout(pipe));
 342
 343         /*
 344          * Setup QH (3.6 in ehci-r10.pdf)
 345          *
 346          *   qh_link ................. 03-00 H
 347          *   qh_endpt1 ............... 07-04 H
 348          *   qh_endpt2 ............... 0B-08 H
 349          * - qh_curtd
 350          *   qh_overlay.qt_next ...... 13-10 H
 351          * - qh_overlay.qt_altnext
 352          */
 353         qh->qh_link = cpu_to_hc32((uint32_t)&ctrl->qh_list | QH_LINK_TYPE_QH);
 354         c = (dev->speed != USB_SPEED_HIGH) && !usb_pipeendpoint(pipe);
 355         maxpacket = usb_maxpacket(dev, pipe);
 356         endpt = QH_ENDPT1_RL(8) | QH_ENDPT1_C(c) |
 357                 QH_ENDPT1_MAXPKTLEN(maxpacket) | QH_ENDPT1_H(0) |
 358                 QH_ENDPT1_DTC(QH_ENDPT1_DTC_DT_FROM_QTD) |
 359                 QH_ENDPT1_EPS(ehci_encode_speed(dev->speed)) |
 360                 QH_ENDPT1_ENDPT(usb_pipeendpoint(pipe)) | QH_ENDPT1_I(0) |
 361                 QH_ENDPT1_DEVADDR(usb_pipedevice(pipe));
 362         qh->qh_endpt1 = cpu_to_hc32(endpt);
 363         endpt = QH_ENDPT2_MULT(1) | QH_ENDPT2_PORTNUM(dev->portnr) |
 364                 QH_ENDPT2_HUBADDR(dev->parent->devnum) |
 365                 QH_ENDPT2_UFCMASK(0) | QH_ENDPT2_UFSMASK(0);
 366         qh->qh_endpt2 = cpu_to_hc32(endpt);
 367         qh->qh_overlay.qt_next = cpu_to_hc32(QT_NEXT_TERMINATE);
 368
 369         tdp = &qh->qh_overlay.qt_next;
 370
 371         if (req != NULL) {
 372                 /*
 373                  * Setup request qTD (3.5 in ehci-r10.pdf)
 374                  *
 375                  *   qt_next ................ 03-00 H
 376                  *   qt_altnext ............. 07-04 H
 377                  *   qt_token ............... 0B-08 H
 378                  *
 379                  *   [ buffer, buffer_hi ] loaded with "req".
 380                  */
 381                 qtd[qtd_counter].qt_next = cpu_to_hc32(QT_NEXT_TERMINATE);
 382                 qtd[qtd_counter].qt_altnext = cpu_to_hc32(QT_NEXT_TERMINATE);
 383                 token = QT_TOKEN_DT(0) | QT_TOKEN_TOTALBYTES(sizeof(*req)) |
 384                         QT_TOKEN_IOC(0) | QT_TOKEN_CPAGE(0) | QT_TOKEN_CERR(3) |
 385                         QT_TOKEN_PID(QT_TOKEN_PID_SETUP) |
 386                         QT_TOKEN_STATUS(QT_TOKEN_STATUS_ACTIVE);
 387                 qtd[qtd_counter].qt_token = cpu_to_hc32(token);
 388                 if (ehci_td_buffer(&qtd[qtd_counter], req, sizeof(*req))) {
 389                         printf("unable to construct SETUP TD\n");
 390                         goto fail;
 391                 }
 392                 /* Update previous qTD! */
 393                 *tdp = cpu_to_hc32((uint32_t)&qtd[qtd_counter]);
 394                 tdp = &qtd[qtd_counter++].qt_next;
 395                 toggle = 1;
 396         }
 397
 398         if (length > 0 || req == NULL) {
 399                 uint8_t *buf_ptr = buffer;
 400                 int left_length = length;
 401
 402                 do {
 403                         /*
 404                          * Determine the size of this qTD transfer. By default,
 405                          * QT_BUFFER_CNT full pages can be used.
 406                          */
 407                         int xfr_bytes = QT_BUFFER_CNT * EHCI_PAGE_SIZE;
 408                         /*
 409                          * However, if the input buffer is not page-aligned, the
 410                          * portion of the first page before the buffer start
 411                          * offset within that page is unusable.
 412                          */
 413                         xfr_bytes -= (uint32_t)buf_ptr & (EHCI_PAGE_SIZE - 1);
 414                         /*
 415                          * In order to keep each packet within a qTD transfer,
 416                          * align the qTD transfer size to PKT_ALIGN.
 417                          */
 418                         xfr_bytes &= ~(PKT_ALIGN - 1);
 419                         /*
 420                          * This transfer may be shorter than the available qTD
 421                          * transfer size that has just been computed.
 422                          */
 423                         xfr_bytes = min(xfr_bytes, left_length);
 424
 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 "buffer".
 433                          */
 434                         qtd[qtd_counter].qt_next =
 435                                         cpu_to_hc32(QT_NEXT_TERMINATE);
 436                         qtd[qtd_counter].qt_altnext =
 437                                         cpu_to_hc32(QT_NEXT_TERMINATE);
 438                         token = QT_TOKEN_DT(toggle) |
 439                                 QT_TOKEN_TOTALBYTES(xfr_bytes) |
 440                                 QT_TOKEN_IOC(req == NULL) | QT_TOKEN_CPAGE(0) |
 441                                 QT_TOKEN_CERR(3) |
 442                                 QT_TOKEN_PID(usb_pipein(pipe) ?
 443                                         QT_TOKEN_PID_IN : QT_TOKEN_PID_OUT) |
 444                                 QT_TOKEN_STATUS(QT_TOKEN_STATUS_ACTIVE);
 445                         qtd[qtd_counter].qt_token = cpu_to_hc32(token);
 446                         if (ehci_td_buffer(&qtd[qtd_counter], buf_ptr,
 447                                                 xfr_bytes)) {
 448                                 printf("unable to construct DATA TD\n");
 449                                 goto fail;
 450                         }
 451                         /* Update previous qTD! */
 452                         *tdp = cpu_to_hc32((uint32_t)&qtd[qtd_counter]);
 453                         tdp = &qtd[qtd_counter++].qt_next;
 454                         /*
 455                          * Data toggle has to be adjusted since the qTD transfer
 456                          * size is not always an even multiple of
 457                          * wMaxPacketSize.
 458                          */
 459                         if ((xfr_bytes / maxpacket) & 1)
 460                                 toggle ^= 1;
 461                         buf_ptr += xfr_bytes;
 462                         left_length -= xfr_bytes;
 463                 } while (left_length > 0);
 464         }
 465
 466         if (req != NULL) {
 467                 /*
 468                  * Setup request qTD (3.5 in ehci-r10.pdf)
 469                  *
 470                  *   qt_next ................ 03-00 H
 471                  *   qt_altnext ............. 07-04 H
 472                  *   qt_token ............... 0B-08 H
 473                  */
 474                 qtd[qtd_counter].qt_next = cpu_to_hc32(QT_NEXT_TERMINATE);
 475                 qtd[qtd_counter].qt_altnext = cpu_to_hc32(QT_NEXT_TERMINATE);
 476                 token = QT_TOKEN_DT(1) | QT_TOKEN_TOTALBYTES(0) |
 477                         QT_TOKEN_IOC(1) | QT_TOKEN_CPAGE(0) | QT_TOKEN_CERR(3) |
 478                         QT_TOKEN_PID(usb_pipein(pipe) ?
 479                                 QT_TOKEN_PID_OUT : QT_TOKEN_PID_IN) |
 480                         QT_TOKEN_STATUS(QT_TOKEN_STATUS_ACTIVE);
 481                 qtd[qtd_counter].qt_token = cpu_to_hc32(token);
 482                 /* Update previous qTD! */
 483                 *tdp = cpu_to_hc32((uint32_t)&qtd[qtd_counter]);
 484                 tdp = &qtd[qtd_counter++].qt_next;
 485         }
 486
 487         ctrl->qh_list.qh_link = cpu_to_hc32((uint32_t)qh | QH_LINK_TYPE_QH);
 488
 489         /* Flush dcache */
 490         flush_dcache_range((uint32_t)&ctrl->qh_list,
 491                 ALIGN_END_ADDR(struct QH, &ctrl->qh_list, 1));
 492         flush_dcache_range((uint32_t)qh, ALIGN_END_ADDR(struct QH, qh, 1));
 493         flush_dcache_range((uint32_t)qtd,
 494                            ALIGN_END_ADDR(struct qTD, qtd, qtd_count));
 495
 496         /* Set async. queue head pointer. */
 497         ehci_writel(&ctrl->hcor->or_asynclistaddr, (uint32_t)&ctrl->qh_list);
 498
 499         usbsts = ehci_readl(&ctrl->hcor->or_usbsts);
 500         ehci_writel(&ctrl->hcor->or_usbsts, (usbsts & 0x3f));
 501
 502         /* Enable async. schedule. */
 503         cmd = ehci_readl(&ctrl->hcor->or_usbcmd);
 504         cmd |= CMD_ASE;
 505         ehci_writel(&ctrl->hcor->or_usbcmd, cmd);
 506
 507         ret = handshake((uint32_t *)&ctrl->hcor->or_usbsts, STS_ASS, STS_ASS,
 508                         100 * 1000);
 509         if (ret < 0) {
 510                 printf("EHCI fail timeout STS_ASS set\n");
 511                 goto fail;
 512         }
 513
 514         /* Wait for TDs to be processed. */
 515         ts = get_timer(0);
 516         vtd = &qtd[qtd_counter - 1];
 517         timeout = USB_TIMEOUT_MS(pipe);
 518         do {
 519                 /* Invalidate dcache */
 520                 invalidate_dcache_range((uint32_t)&ctrl->qh_list,
 521                         ALIGN_END_ADDR(struct QH, &ctrl->qh_list, 1));
 522                 invalidate_dcache_range((uint32_t)qh,
 523                         ALIGN_END_ADDR(struct QH, qh, 1));
 524                 invalidate_dcache_range((uint32_t)qtd,
 525                         ALIGN_END_ADDR(struct qTD, qtd, qtd_count));
 526
 527                 token = hc32_to_cpu(vtd->qt_token);
 528                 if (!(QT_TOKEN_GET_STATUS(token) & QT_TOKEN_STATUS_ACTIVE))
 529                         break;
 530                 WATCHDOG_RESET();
 531         } while (get_timer(ts) < timeout);
 532
 533         /*
 534          * Invalidate the memory area occupied by buffer
 535          * Don't try to fix the buffer alignment, if it isn't properly
 536          * aligned it's upper layer's fault so let invalidate_dcache_range()
 537          * vow about it. But we have to fix the length as it's actual
 538          * transfer length and can be unaligned. This is potentially
 539          * dangerous operation, it's responsibility of the calling
 540          * code to make sure enough space is reserved.
 541          */
 542         invalidate_dcache_range((uint32_t)buffer,
 543                 ALIGN((uint32_t)buffer + length, ARCH_DMA_MINALIGN));
 544
 545         /* Check that the TD processing happened */
 546         if (QT_TOKEN_GET_STATUS(token) & QT_TOKEN_STATUS_ACTIVE)
 547                 printf("EHCI timed out on TD - token=%#x\n", token);
 548
 549         /* Disable async schedule. */
 550         cmd = ehci_readl(&ctrl->hcor->or_usbcmd);
 551         cmd &= ~CMD_ASE;
 552         ehci_writel(&ctrl->hcor->or_usbcmd, cmd);
 553
 554         ret = handshake((uint32_t *)&ctrl->hcor->or_usbsts, STS_ASS, 0,
 555                         100 * 1000);
 556         if (ret < 0) {
 557                 printf("EHCI fail timeout STS_ASS reset\n");
 558                 goto fail;
 559         }
 560
 561         token = hc32_to_cpu(qh->qh_overlay.qt_token);
 562         if (!(QT_TOKEN_GET_STATUS(token) & QT_TOKEN_STATUS_ACTIVE)) {
 563                 debug("TOKEN=%#x\n", token);
 564                 switch (QT_TOKEN_GET_STATUS(token) &
 565                         ~(QT_TOKEN_STATUS_SPLITXSTATE | QT_TOKEN_STATUS_PERR)) {
 566                 case 0:
 567                         toggle = QT_TOKEN_GET_DT(token);
 568                         usb_settoggle(dev, usb_pipeendpoint(pipe),
 569                                        usb_pipeout(pipe), toggle);
 570                         dev->status = 0;
 571                         break;
 572                 case QT_TOKEN_STATUS_HALTED:
 573                         dev->status = USB_ST_STALLED;
 574                         break;
 575                 case QT_TOKEN_STATUS_ACTIVE | QT_TOKEN_STATUS_DATBUFERR:
 576                 case QT_TOKEN_STATUS_DATBUFERR:
 577                         dev->status = USB_ST_BUF_ERR;
 578                         break;
 579                 case QT_TOKEN_STATUS_HALTED | QT_TOKEN_STATUS_BABBLEDET:
 580                 case QT_TOKEN_STATUS_BABBLEDET:
 581                         dev->status = USB_ST_BABBLE_DET;
 582                         break;
 583                 default:
 584                         dev->status = USB_ST_CRC_ERR;
 585                         if (QT_TOKEN_GET_STATUS(token) & QT_TOKEN_STATUS_HALTED)
 586                                 dev->status |= USB_ST_STALLED;
 587                         break;
 588                 }
 589                 dev->act_len = length - QT_TOKEN_GET_TOTALBYTES(token);
 590         } else {
 591                 dev->act_len = 0;
 592                 debug("dev=%u, usbsts=%#x, p[1]=%#x, p[2]=%#x\n",
 593                       dev->devnum, ehci_readl(&ctrl->hcor->or_usbsts),
 594                       ehci_readl(&ctrl->hcor->or_portsc[0]),
 595                       ehci_readl(&ctrl->hcor->or_portsc[1]));
 596         }
 597
 598         free(qtd);
 599         return (dev->status != USB_ST_NOT_PROC) ? 0 : -1;
 600
 601 fail:
 602         free(qtd);
 603         return -1;
 604 }
 605
 606 static inline int min3(int a, int b, int c)
 607 {
 608
 609         if (b < a)
 610                 a = b;
 611         if (c < a)
 612                 a = c;
 613         return a;
 614 }
 615
 616 int
 617 ehci_submit_root(struct usb_device *dev, unsigned long pipe, void *buffer,
 618                  int length, struct devrequest *req)
 619 {
 620         uint8_t tmpbuf[4];
 621         u16 typeReq;
 622         void *srcptr = NULL;
 623         int len, srclen;
 624         uint32_t reg;
 625         uint32_t *status_reg;
 626         int port = le16_to_cpu(req->index) & 0xff;
 627         struct ehci_ctrl *ctrl = dev->controller;
 628
 629         if (port > CONFIG_SYS_USB_EHCI_MAX_ROOT_PORTS) {
 630                 printf("The request port(%d) is not configured\n", port - 1);
 631                 return -1;
 632         }
 633         status_reg = (uint32_t *)&ctrl->hcor->or_portsc[port - 1];
 634         srclen = 0;
 635
 636         debug("req=%u (%#x), type=%u (%#x), value=%u, index=%u\n",
 637               req->request, req->request,
 638               req->requesttype, req->requesttype,
 639               le16_to_cpu(req->value), le16_to_cpu(req->index));
 640
 641         typeReq = req->request | req->requesttype << 8;
 642
 643         switch (typeReq) {
 644         case DeviceRequest | USB_REQ_GET_DESCRIPTOR:
 645                 switch (le16_to_cpu(req->value) >> 8) {
 646                 case USB_DT_DEVICE:
 647                         debug("USB_DT_DEVICE request\n");
 648                         srcptr = &descriptor.device;
 649                         srclen = descriptor.device.bLength;
 650                         break;
 651                 case USB_DT_CONFIG:
 652                         debug("USB_DT_CONFIG config\n");
 653                         srcptr = &descriptor.config;
 654                         srclen = descriptor.config.bLength +
 655                                         descriptor.interface.bLength +
 656                                         descriptor.endpoint.bLength;
 657                         break;
 658                 case USB_DT_STRING:
 659                         debug("USB_DT_STRING config\n");
 660                         switch (le16_to_cpu(req->value) & 0xff) {
 661                         case 0: /* Language */
 662                                 srcptr = "\4\3\1\0";
 663                                 srclen = 4;
 664                                 break;
 665                         case 1: /* Vendor */
 666                                 srcptr = "\16\3u\0-\0b\0o\0o\0t\0";
 667                                 srclen = 14;
 668                                 break;
 669                         case 2: /* Product */
 670                                 srcptr = "\52\3E\0H\0C\0I\0 "
 671                                          "\0H\0o\0s\0t\0 "
 672                                          "\0C\0o\0n\0t\0r\0o\0l\0l\0e\0r\0";
 673                                 srclen = 42;
 674                                 break;
 675                         default:
 676                                 debug("unknown value DT_STRING %x\n",
 677                                         le16_to_cpu(req->value));
 678                                 goto unknown;
 679                         }
 680                         break;
 681                 default:
 682                         debug("unknown value %x\n", le16_to_cpu(req->value));
 683                         goto unknown;
 684                 }
 685                 break;
 686         case USB_REQ_GET_DESCRIPTOR | ((USB_DIR_IN | USB_RT_HUB) << 8):
 687                 switch (le16_to_cpu(req->value) >> 8) {
 688                 case USB_DT_HUB:
 689                         debug("USB_DT_HUB config\n");
 690                         srcptr = &descriptor.hub;
 691                         srclen = descriptor.hub.bLength;
 692                         break;
 693                 default:
 694                         debug("unknown value %x\n", le16_to_cpu(req->value));
 695                         goto unknown;
 696                 }
 697                 break;
 698         case USB_REQ_SET_ADDRESS | (USB_RECIP_DEVICE << 8):
 699                 debug("USB_REQ_SET_ADDRESS\n");
 700                 ctrl->rootdev = le16_to_cpu(req->value);
 701                 break;
 702         case DeviceOutRequest | USB_REQ_SET_CONFIGURATION:
 703                 debug("USB_REQ_SET_CONFIGURATION\n");
 704                 /* Nothing to do */
 705                 break;
 706         case USB_REQ_GET_STATUS | ((USB_DIR_IN | USB_RT_HUB) << 8):
 707                 tmpbuf[0] = 1;  /* USB_STATUS_SELFPOWERED */
 708                 tmpbuf[1] = 0;
 709                 srcptr = tmpbuf;
 710                 srclen = 2;
 711                 break;
 712         case USB_REQ_GET_STATUS | ((USB_RT_PORT | USB_DIR_IN) << 8):
 713                 memset(tmpbuf, 0, 4);
 714                 reg = ehci_readl(status_reg);
 715                 if (reg & EHCI_PS_CS)
 716                         tmpbuf[0] |= USB_PORT_STAT_CONNECTION;
 717                 if (reg & EHCI_PS_PE)
 718                         tmpbuf[0] |= USB_PORT_STAT_ENABLE;
 719                 if (reg & EHCI_PS_SUSP)
 720                         tmpbuf[0] |= USB_PORT_STAT_SUSPEND;
 721                 if (reg & EHCI_PS_OCA)
 722                         tmpbuf[0] |= USB_PORT_STAT_OVERCURRENT;
 723                 if (reg & EHCI_PS_PR)
 724                         tmpbuf[0] |= USB_PORT_STAT_RESET;
 725                 if (reg & EHCI_PS_PP)
 726                         tmpbuf[1] |= USB_PORT_STAT_POWER >> 8;
 727
 728                 if (ehci_is_TDI()) {
 729                         switch (ehci_get_port_speed(ctrl->hcor, reg)) {
 730                         case PORTSC_PSPD_FS:
 731                                 break;
 732                         case PORTSC_PSPD_LS:
 733                                 tmpbuf[1] |= USB_PORT_STAT_LOW_SPEED >> 8;
 734                                 break;
 735                         case PORTSC_PSPD_HS:
 736                         default:
 737                                 tmpbuf[1] |= USB_PORT_STAT_HIGH_SPEED >> 8;
 738                                 break;
 739                         }
 740                 } else {
 741                         tmpbuf[1] |= USB_PORT_STAT_HIGH_SPEED >> 8;
 742                 }
 743
 744                 if (reg & EHCI_PS_CSC)
 745                         tmpbuf[2] |= USB_PORT_STAT_C_CONNECTION;
 746                 if (reg & EHCI_PS_PEC)
 747                         tmpbuf[2] |= USB_PORT_STAT_C_ENABLE;
 748                 if (reg & EHCI_PS_OCC)
 749                         tmpbuf[2] |= USB_PORT_STAT_C_OVERCURRENT;
 750                 if (ctrl->portreset & (1 << port))
 751                         tmpbuf[2] |= USB_PORT_STAT_C_RESET;
 752
 753                 srcptr = tmpbuf;
 754                 srclen = 4;
 755                 break;
 756         case USB_REQ_SET_FEATURE | ((USB_DIR_OUT | USB_RT_PORT) << 8):
 757                 reg = ehci_readl(status_reg);
 758                 reg &= ~EHCI_PS_CLEAR;
 759                 switch (le16_to_cpu(req->value)) {
 760                 case USB_PORT_FEAT_ENABLE:
 761                         reg |= EHCI_PS_PE;
 762                         ehci_writel(status_reg, reg);
 763                         break;
 764                 case USB_PORT_FEAT_POWER:
 765                         if (HCS_PPC(ehci_readl(&ctrl->hccr->cr_hcsparams))) {
 766                                 reg |= EHCI_PS_PP;
 767                                 ehci_writel(status_reg, reg);
 768                         }
 769                         break;
 770                 case USB_PORT_FEAT_RESET:
 771                         if ((reg & (EHCI_PS_PE | EHCI_PS_CS)) == EHCI_PS_CS &&
 772                             !ehci_is_TDI() &&
 773                             EHCI_PS_IS_LOWSPEED(reg)) {
 774                                 /* Low speed device, give up ownership. */
 775                                 debug("port %d low speed --> companion\n",
 776                                       port - 1);
 777                                 reg |= EHCI_PS_PO;
 778                                 ehci_writel(status_reg, reg);
 779                                 break;
 780                         } else {
 781                                 int ret;
 782
 783                                 reg |= EHCI_PS_PR;
 784                                 reg &= ~EHCI_PS_PE;
 785                                 ehci_writel(status_reg, reg);
 786                                 /*
 787                                  * caller must wait, then call GetPortStatus
 788                                  * usb 2.0 specification say 50 ms resets on
 789                                  * root
 790                                  */
 791                                 ehci_powerup_fixup(status_reg, &reg);
 792
 793                                 ehci_writel(status_reg, reg & ~EHCI_PS_PR);
 794                                 /*
 795                                  * A host controller must terminate the reset
 796                                  * and stabilize the state of the port within
 797                                  * 2 milliseconds
 798                                  */
 799                                 ret = handshake(status_reg, EHCI_PS_PR, 0,
 800                                                 2 * 1000);
 801                                 if (!ret)
 802                                         ctrl->portreset |= 1 << port;
 803                                 else
 804                                         printf("port(%d) reset error\n",
 805                                                port - 1);
 806                         }
 807                         break;
 808                 case USB_PORT_FEAT_TEST:
 809                         reg &= ~(0xf << 16);
 810                         reg |= ((le16_to_cpu(req->index) >> 8) & 0xf) << 16;
 811                         ehci_writel(status_reg, reg);
 812                         break;
 813                 default:
 814                         debug("unknown feature %x\n", le16_to_cpu(req->value));
 815                         goto unknown;
 816                 }
 817                 /* unblock posted writes */
 818                 (void) ehci_readl(&ctrl->hcor->or_usbcmd);
 819                 break;
 820         case USB_REQ_CLEAR_FEATURE | ((USB_DIR_OUT | USB_RT_PORT) << 8):
 821                 reg = ehci_readl(status_reg);
 822                 switch (le16_to_cpu(req->value)) {
 823                 case USB_PORT_FEAT_ENABLE:
 824                         reg &= ~EHCI_PS_PE;
 825                         break;
 826                 case USB_PORT_FEAT_C_ENABLE:
 827                         reg = (reg & ~EHCI_PS_CLEAR) | EHCI_PS_PE;
 828                         break;
 829                 case USB_PORT_FEAT_POWER:
 830                         if (HCS_PPC(ehci_readl(&ctrl->hccr->cr_hcsparams)))
 831                                 reg = reg & ~(EHCI_PS_CLEAR | EHCI_PS_PP);
 832                 case USB_PORT_FEAT_C_CONNECTION:
 833                         reg = (reg & ~EHCI_PS_CLEAR) | EHCI_PS_CSC;
 834                         break;
 835                 case USB_PORT_FEAT_OVER_CURRENT:
 836                         reg = (reg & ~EHCI_PS_CLEAR) | EHCI_PS_OCC;
 837                         break;
 838                 case USB_PORT_FEAT_C_RESET:
 839                         ctrl->portreset &= ~(1 << port);
 840                         break;
 841                 default:
 842                         debug("unknown feature %x\n", le16_to_cpu(req->value));
 843                         goto unknown;
 844                 }
 845                 ehci_writel(status_reg, reg);
 846                 /* unblock posted write */
 847                 (void) ehci_readl(&ctrl->hcor->or_usbcmd);
 848                 break;
 849         default:
 850                 debug("Unknown request\n");
 851                 goto unknown;
 852         }
 853
 854         mdelay(1);
 855         len = min3(srclen, le16_to_cpu(req->length), length);
 856         if (srcptr != NULL && len > 0)
 857                 memcpy(buffer, srcptr, len);
 858         else
 859                 debug("Len is 0\n");
 860
 861         dev->act_len = len;
 862         dev->status = 0;
 863         return 0;
 864
 865 unknown:
 866         debug("requesttype=%x, request=%x, value=%x, index=%x, length=%x\n",
 867               req->requesttype, req->request, le16_to_cpu(req->value),
 868               le16_to_cpu(req->index), le16_to_cpu(req->length));
 869
 870         dev->act_len = 0;
 871         dev->status = USB_ST_STALLED;
 872         return -1;
 873 }
 874
 875 int usb_lowlevel_stop(int index)
 876 {
 877         return ehci_hcd_stop(index);
 878 }
 879
 880 int usb_lowlevel_init(int index, void **controller)
 881 {
 882         uint32_t reg;
 883         uint32_t cmd;
 884         struct QH *qh_list;
 885         struct QH *periodic;
 886         int i;
 887
 888         if (ehci_hcd_init(index, &ehcic[index].hccr, &ehcic[index].hcor))
 889                 return -1;
 890
 891         /* EHCI spec section 4.1 */
 892         if (ehci_reset(index))
 893                 return -1;
 894
 895 #if defined(CONFIG_EHCI_HCD_INIT_AFTER_RESET)
 896         if (ehci_hcd_init(index, &ehcic[index].hccr, &ehcic[index].hcor))
 897                 return -1;
 898 #endif
 899         /* Set the high address word (aka segment) for 64-bit controller */
 900         if (ehci_readl(&ehcic[index].hccr->cr_hccparams) & 1)
 901                 ehci_writel(ehcic[index].hcor->or_ctrldssegment, 0);
 902
 903         qh_list = &ehcic[index].qh_list;
 904
 905         /* Set head of reclaim list */
 906         memset(qh_list, 0, sizeof(*qh_list));
 907         qh_list->qh_link = cpu_to_hc32((uint32_t)qh_list | QH_LINK_TYPE_QH);
 908         qh_list->qh_endpt1 = cpu_to_hc32(QH_ENDPT1_H(1) |
 909                                                 QH_ENDPT1_EPS(USB_SPEED_HIGH));
 910         qh_list->qh_curtd = cpu_to_hc32(QT_NEXT_TERMINATE);
 911         qh_list->qh_overlay.qt_next = cpu_to_hc32(QT_NEXT_TERMINATE);
 912         qh_list->qh_overlay.qt_altnext = cpu_to_hc32(QT_NEXT_TERMINATE);
 913         qh_list->qh_overlay.qt_token =
 914                         cpu_to_hc32(QT_TOKEN_STATUS(QT_TOKEN_STATUS_HALTED));
 915
 916         /* Set async. queue head pointer. */
 917         ehci_writel(&ehcic[index].hcor->or_asynclistaddr, (uint32_t)qh_list);
 918
 919         /*
 920          * Set up periodic list
 921          * Step 1: Parent QH for all periodic transfers.
 922          */
 923         periodic = &ehcic[index].periodic_queue;
 924         memset(periodic, 0, sizeof(*periodic));
 925         periodic->qh_link = cpu_to_hc32(QH_LINK_TERMINATE);
 926         periodic->qh_overlay.qt_next = cpu_to_hc32(QT_NEXT_TERMINATE);
 927         periodic->qh_overlay.qt_altnext = cpu_to_hc32(QT_NEXT_TERMINATE);
 928
 929         /*
 930          * Step 2: Setup frame-list: Every microframe, USB tries the same list.
 931          *         In particular, device specifications on polling frequency
 932          *         are disregarded. Keyboards seem to send NAK/NYet reliably
 933          *         when polled with an empty buffer.
 934          *
 935          *         Split Transactions will be spread across microframes using
 936          *         S-mask and C-mask.
 937          */
 938         ehcic[index].periodic_list = memalign(4096, 1024*4);
 939         if (!ehcic[index].periodic_list)
 940                 return -ENOMEM;
 941         for (i = 0; i < 1024; i++) {
 942                 ehcic[index].periodic_list[i] = (uint32_t)periodic
 943                                                 | QH_LINK_TYPE_QH;
 944         }
 945
 946         /* Set periodic list base address */
 947         ehci_writel(&ehcic[index].hcor->or_periodiclistbase,
 948                 (uint32_t)ehcic[index].periodic_list);
 949
 950         reg = ehci_readl(&ehcic[index].hccr->cr_hcsparams);
 951         descriptor.hub.bNbrPorts = HCS_N_PORTS(reg);
 952         debug("Register %x NbrPorts %d\n", reg, descriptor.hub.bNbrPorts);
 953         /* Port Indicators */
 954         if (HCS_INDICATOR(reg))
 955                 put_unaligned(get_unaligned(&descriptor.hub.wHubCharacteristics)
 956                                 | 0x80, &descriptor.hub.wHubCharacteristics);
 957         /* Port Power Control */
 958         if (HCS_PPC(reg))
 959                 put_unaligned(get_unaligned(&descriptor.hub.wHubCharacteristics)
 960                                 | 0x01, &descriptor.hub.wHubCharacteristics);
 961
 962         /* Start the host controller. */
 963         cmd = ehci_readl(&ehcic[index].hcor->or_usbcmd);
 964         /*
 965          * Philips, Intel, and maybe others need CMD_RUN before the
 966          * root hub will detect new devices (why?); NEC doesn't
 967          */
 968         cmd &= ~(CMD_LRESET|CMD_IAAD|CMD_PSE|CMD_ASE|CMD_RESET);
 969         cmd |= CMD_RUN;
 970         ehci_writel(&ehcic[index].hcor->or_usbcmd, cmd);
 971
 972         /* take control over the ports */
 973         cmd = ehci_readl(&ehcic[index].hcor->or_configflag);
 974         cmd |= FLAG_CF;
 975         ehci_writel(&ehcic[index].hcor->or_configflag, cmd);
 976         /* unblock posted write */
 977         cmd = ehci_readl(&ehcic[index].hcor->or_usbcmd);
 978         mdelay(5);
 979         reg = HC_VERSION(ehci_readl(&ehcic[index].hccr->cr_capbase));
 980         printf("USB EHCI %x.%02x\n", reg >> 8, reg & 0xff);
 981
 982         ehcic[index].rootdev = 0;
 983
 984         *controller = &ehcic[index];
 985         return 0;
 986 }
 987
 988 int
 989 submit_bulk_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
 990                 int length)
 991 {
 992
 993         if (usb_pipetype(pipe) != PIPE_BULK) {
 994                 debug("non-bulk pipe (type=%lu)", usb_pipetype(pipe));
 995                 return -1;
 996         }
 997         return ehci_submit_async(dev, pipe, buffer, length, NULL);
 998 }
 999
1000 int
1001 submit_control_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
1002                    int length, struct devrequest *setup)
1003 {
1004         struct ehci_ctrl *ctrl = dev->controller;
1005
1006         if (usb_pipetype(pipe) != PIPE_CONTROL) {
1007                 debug("non-control pipe (type=%lu)", usb_pipetype(pipe));
1008                 return -1;
1009         }
1010
1011         if (usb_pipedevice(pipe) == ctrl->rootdev) {
1012                 if (!ctrl->rootdev)
1013                         dev->speed = USB_SPEED_HIGH;
1014                 return ehci_submit_root(dev, pipe, buffer, length, setup);
1015         }
1016         return ehci_submit_async(dev, pipe, buffer, length, setup);
1017 }
1018
1019 struct int_queue {
1020         struct QH *first;
1021         struct QH *current;
1022         struct QH *last;
1023         struct qTD *tds;
1024 };
1025
1026 #define NEXT_QH(qh) (struct QH *)((qh)->qh_link & ~0x1f)
1027
1028 static int
1029 enable_periodic(struct ehci_ctrl *ctrl)
1030 {
1031         uint32_t cmd;
1032         struct ehci_hcor *hcor = ctrl->hcor;
1033         int ret;
1034
1035         cmd = ehci_readl(&hcor->or_usbcmd);
1036         cmd |= CMD_PSE;
1037         ehci_writel(&hcor->or_usbcmd, cmd);
1038
1039         ret = handshake((uint32_t *)&hcor->or_usbsts,
1040                         STS_PSS, STS_PSS, 100 * 1000);
1041         if (ret < 0) {
1042                 printf("EHCI failed: timeout when enabling periodic list\n");
1043                 return -ETIMEDOUT;
1044         }
1045         udelay(1000);
1046         return 0;
1047 }
1048
1049 static int
1050 disable_periodic(struct ehci_ctrl *ctrl)
1051 {
1052         uint32_t cmd;
1053         struct ehci_hcor *hcor = ctrl->hcor;
1054         int ret;
1055
1056         cmd = ehci_readl(&hcor->or_usbcmd);
1057         cmd &= ~CMD_PSE;
1058         ehci_writel(&hcor->or_usbcmd, cmd);
1059
1060         ret = handshake((uint32_t *)&hcor->or_usbsts,
1061                         STS_PSS, 0, 100 * 1000);
1062         if (ret < 0) {
1063                 printf("EHCI failed: timeout when disabling periodic list\n");
1064                 return -ETIMEDOUT;
1065         }
1066         return 0;
1067 }
1068
1069 static int periodic_schedules;
1070
1071 struct int_queue *
1072 create_int_queue(struct usb_device *dev, unsigned long pipe, int queuesize,
1073                  int elementsize, void *buffer)
1074 {
1075         struct ehci_ctrl *ctrl = dev->controller;
1076         struct int_queue *result = NULL;
1077         int i;
1078
1079         debug("Enter create_int_queue\n");
1080         if (usb_pipetype(pipe) != PIPE_INTERRUPT) {
1081                 debug("non-interrupt pipe (type=%lu)", usb_pipetype(pipe));
1082                 return NULL;
1083         }
1084
1085         /* limit to 4 full pages worth of data -
1086          * we can safely fit them in a single TD,
1087          * no matter the alignment
1088          */
1089         if (elementsize >= 16384) {
1090                 debug("too large elements for interrupt transfers\n");
1091                 return NULL;
1092         }
1093
1094         result = malloc(sizeof(*result));
1095         if (!result) {
1096                 debug("ehci intr queue: out of memory\n");
1097                 goto fail1;
1098         }
1099         result->first = memalign(32, sizeof(struct QH) * queuesize);
1100         if (!result->first) {
1101                 debug("ehci intr queue: out of memory\n");
1102                 goto fail2;
1103         }
1104         result->current = result->first;
1105         result->last = result->first + queuesize - 1;
1106         result->tds = memalign(32, sizeof(struct qTD) * queuesize);
1107         if (!result->tds) {
1108                 debug("ehci intr queue: out of memory\n");
1109                 goto fail3;
1110         }
1111         memset(result->first, 0, sizeof(struct QH) * queuesize);
1112         memset(result->tds, 0, sizeof(struct qTD) * queuesize);
1113
1114         for (i = 0; i < queuesize; i++) {
1115                 struct QH *qh = result->first + i;
1116                 struct qTD *td = result->tds + i;
1117                 void **buf = &qh->buffer;
1118
1119                 qh->qh_link = (uint32_t)(qh+1) | QH_LINK_TYPE_QH;
1120                 if (i == queuesize - 1)
1121                         qh->qh_link = QH_LINK_TERMINATE;
1122
1123                 qh->qh_overlay.qt_next = (uint32_t)td;
1124                 qh->qh_endpt1 = (0 << 28) | /* No NAK reload (ehci 4.9) */
1125                         (usb_maxpacket(dev, pipe) << 16) | /* MPS */
1126                         (1 << 14) |
1127                         QH_ENDPT1_EPS(ehci_encode_speed(dev->speed)) |
1128                         (usb_pipeendpoint(pipe) << 8) | /* Endpoint Number */
1129                         (usb_pipedevice(pipe) << 0);
1130                 qh->qh_endpt2 = (1 << 30) | /* 1 Tx per mframe */
1131                         (1 << 0); /* S-mask: microframe 0 */
1132                 if (dev->speed == USB_SPEED_LOW ||
1133                                 dev->speed == USB_SPEED_FULL) {
1134                         debug("TT: port: %d, hub address: %d\n",
1135                                 dev->portnr, dev->parent->devnum);
1136                         qh->qh_endpt2 |= (dev->portnr << 23) |
1137                                 (dev->parent->devnum << 16) |
1138                                 (0x1c << 8); /* C-mask: microframes 2-4 */
1139                 }
1140
1141                 td->qt_next = QT_NEXT_TERMINATE;
1142                 td->qt_altnext = QT_NEXT_TERMINATE;
1143                 debug("communication direction is '%s'\n",
1144                       usb_pipein(pipe) ? "in" : "out");
1145                 td->qt_token = (elementsize << 16) |
1146                         ((usb_pipein(pipe) ? 1 : 0) << 8) | /* IN/OUT token */
1147                         0x80; /* active */
1148                 td->qt_buffer[0] = (uint32_t)buffer + i * elementsize;
1149                 td->qt_buffer[1] = (td->qt_buffer[0] + 0x1000) & ~0xfff;
1150                 td->qt_buffer[2] = (td->qt_buffer[0] + 0x2000) & ~0xfff;
1151                 td->qt_buffer[3] = (td->qt_buffer[0] + 0x3000) & ~0xfff;
1152                 td->qt_buffer[4] = (td->qt_buffer[0] + 0x4000) & ~0xfff;
1153
1154                 *buf = buffer + i * elementsize;
1155         }
1156
1157         if (disable_periodic(ctrl) < 0) {
1158                 debug("FATAL: periodic should never fail, but did");
1159                 goto fail3;
1160         }
1161
1162         /* hook up to periodic list */
1163         struct QH *list = &ctrl->periodic_queue;
1164         result->last->qh_link = list->qh_link;
1165         list->qh_link = (uint32_t)result->first | QH_LINK_TYPE_QH;
1166
1167         if (enable_periodic(ctrl) < 0) {
1168                 debug("FATAL: periodic should never fail, but did");
1169                 goto fail3;
1170         }
1171         periodic_schedules++;
1172
1173         debug("Exit create_int_queue\n");
1174         return result;
1175 fail3:
1176         if (result->tds)
1177                 free(result->tds);
1178 fail2:
1179         if (result->first)
1180                 free(result->first);
1181         if (result)
1182                 free(result);
1183 fail1:
1184         return NULL;
1185 }
1186
1187 void *poll_int_queue(struct usb_device *dev, struct int_queue *queue)
1188 {
1189         struct QH *cur = queue->current;
1190
1191         /* depleted queue */
1192         if (cur == NULL) {
1193                 debug("Exit poll_int_queue with completed queue\n");
1194                 return NULL;
1195         }
1196         /* still active */
1197         if (cur->qh_overlay.qt_token & 0x80) {
1198                 debug("Exit poll_int_queue with no completed intr transfer. "
1199                       "token is %x\n", cur->qh_overlay.qt_token);
1200                 return NULL;
1201         }
1202         if (!(cur->qh_link & QH_LINK_TERMINATE))
1203                 queue->current++;
1204         else
1205                 queue->current = NULL;
1206         debug("Exit poll_int_queue with completed intr transfer. "
1207               "token is %x at %p (first at %p)\n", cur->qh_overlay.qt_token,
1208               &cur->qh_overlay.qt_token, queue->first);
1209         return cur->buffer;
1210 }
1211
1212 /* Do not free buffers associated with QHs, they're owned by someone else */
1213 int
1214 destroy_int_queue(struct usb_device *dev, struct int_queue *queue)
1215 {
1216         struct ehci_ctrl *ctrl = dev->controller;
1217         int result = -1;
1218         unsigned long timeout;
1219
1220         if (disable_periodic(ctrl) < 0) {
1221                 debug("FATAL: periodic should never fail, but did");
1222                 goto out;
1223         }
1224         periodic_schedules--;
1225
1226         struct QH *cur = &ctrl->periodic_queue;
1227         timeout = get_timer(0) + 500; /* abort after 500ms */
1228         while (!(cur->qh_link & QH_LINK_TERMINATE)) {
1229                 debug("considering %p, with qh_link %x\n", cur, cur->qh_link);
1230                 if (NEXT_QH(cur) == queue->first) {
1231                         debug("found candidate. removing from chain\n");
1232                         cur->qh_link = queue->last->qh_link;
1233                         result = 0;
1234                         break;
1235                 }
1236                 cur = NEXT_QH(cur);
1237                 if (get_timer(0) > timeout) {
1238                         printf("Timeout destroying interrupt endpoint queue\n");
1239                         result = -1;
1240                         goto out;
1241                 }
1242         }
1243
1244         if (periodic_schedules > 0) {
1245                 result = enable_periodic(ctrl);
1246                 if (result < 0)
1247                         debug("FATAL: periodic should never fail, but did");
1248         }
1249
1250 out:
1251         free(queue->tds);
1252         free(queue->first);
1253         free(queue);
1254
1255         return result;
1256 }
1257
1258 int
1259 submit_int_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
1260                int length, int interval)
1261 {
1262         void *backbuffer;
1263         struct int_queue *queue;
1264         unsigned long timeout;
1265         int result = 0, ret;
1266
1267         debug("dev=%p, pipe=%lu, buffer=%p, length=%d, interval=%d",
1268               dev, pipe, buffer, length, interval);
1269
1270         /*
1271          * Interrupt transfers requiring several transactions are not supported
1272          * because bInterval is ignored.
1273          *
1274          * Also, ehci_submit_async() relies on wMaxPacketSize being a power of 2
1275          * <= PKT_ALIGN if several qTDs are required, while the USB
1276          * specification does not constrain this for interrupt transfers. That
1277          * means that ehci_submit_async() would support interrupt transfers
1278          * requiring several transactions only as long as the transfer size does
1279          * not require more than a single qTD.
1280          */
1281         if (length > usb_maxpacket(dev, pipe)) {
1282                 printf("%s: Interrupt transfers requiring several "
1283                         "transactions are not supported.\n", __func__);
1284                 return -1;
1285         }
1286
1287         queue = create_int_queue(dev, pipe, 1, length, buffer);
1288
1289         timeout = get_timer(0) + USB_TIMEOUT_MS(pipe);
1290         while ((backbuffer = poll_int_queue(dev, queue)) == NULL)
1291                 if (get_timer(0) > timeout) {
1292                         printf("Timeout poll on interrupt endpoint\n");
1293                         result = -ETIMEDOUT;
1294                         break;
1295                 }
1296
1297         if (backbuffer != buffer) {
1298                 debug("got wrong buffer back (%x instead of %x)\n",
1299                       (uint32_t)backbuffer, (uint32_t)buffer);
1300                 return -EINVAL;
1301         }
1302
1303         ret = destroy_int_queue(dev, queue);
1304         if (ret < 0)
1305                 return ret;
1306
1307         /* everything worked out fine */
1308         return result;
1309 }