hw/usb/core.c

   1 /*
   2  * QEMU USB emulation
   3  *
   4  * Copyright (c) 2005 Fabrice Bellard
   5  *
   6  * 2008 Generic packet handler rewrite by Max Krasnyansky
   7  *
   8  * Permission is hereby granted, free of charge, to any person obtaining a copy
   9  * of this software and associated documentation files (the "Software"), to deal
  10  * in the Software without restriction, including without limitation the rights
  11  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  12  * copies of the Software, and to permit persons to whom the Software is
  13  * furnished to do so, subject to the following conditions:
  14  *
  15  * The above copyright notice and this permission notice shall be included in
  16  * all copies or substantial portions of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  19  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  20  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  21  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  22  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  23  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  24  * THE SOFTWARE.
  25  */
  26 #include "qemu-common.h"
  27 #include "hw/usb.h"
  28 #include "qemu/iov.h"
  29 #include "trace.h"
  30
  31 void usb_pick_speed(USBPort *port)
  32 {
  33     static const int speeds[] = {
  34         USB_SPEED_SUPER,
  35         USB_SPEED_HIGH,
  36         USB_SPEED_FULL,
  37         USB_SPEED_LOW,
  38     };
  39     USBDevice *udev = port->dev;
  40     int i;
  41
  42     for (i = 0; i < ARRAY_SIZE(speeds); i++) {
  43         if ((udev->speedmask & (1 << speeds[i])) &&
  44             (port->speedmask & (1 << speeds[i]))) {
  45             udev->speed = speeds[i];
  46             return;
  47         }
  48     }
  49 }
  50
  51 void usb_attach(USBPort *port)
  52 {
  53     USBDevice *dev = port->dev;
  54
  55     assert(dev != NULL);
  56     assert(dev->attached);
  57     assert(dev->state == USB_STATE_NOTATTACHED);
  58     usb_pick_speed(port);
  59     port->ops->attach(port);
  60     dev->state = USB_STATE_ATTACHED;
  61     usb_device_handle_attach(dev);
  62 }
  63
  64 void usb_detach(USBPort *port)
  65 {
  66     USBDevice *dev = port->dev;
  67
  68     assert(dev != NULL);
  69     assert(dev->state != USB_STATE_NOTATTACHED);
  70     port->ops->detach(port);
  71     dev->state = USB_STATE_NOTATTACHED;
  72 }
  73
  74 void usb_port_reset(USBPort *port)
  75 {
  76     USBDevice *dev = port->dev;
  77
  78     assert(dev != NULL);
  79     usb_detach(port);
  80     usb_attach(port);
  81     usb_device_reset(dev);
  82 }
  83
  84 void usb_device_reset(USBDevice *dev)
  85 {
  86     if (dev == NULL || !dev->attached) {
  87         return;
  88     }
  89     dev->remote_wakeup = 0;
  90     dev->addr = 0;
  91     dev->state = USB_STATE_DEFAULT;
  92     usb_device_handle_reset(dev);
  93 }
  94
  95 void usb_wakeup(USBEndpoint *ep, unsigned int stream)
  96 {
  97     USBDevice *dev = ep->dev;
  98     USBBus *bus = usb_bus_from_device(dev);
  99
 100     if (dev->remote_wakeup && dev->port && dev->port->ops->wakeup) {
 101         dev->port->ops->wakeup(dev->port);
 102     }
 103     if (bus->ops->wakeup_endpoint) {
 104         bus->ops->wakeup_endpoint(bus, ep, stream);
 105     }
 106 }
 107
 108 /**********************/
 109
 110 /* generic USB device helpers (you are not forced to use them when
 111    writing your USB device driver, but they help handling the
 112    protocol)
 113 */
 114
 115 #define SETUP_STATE_IDLE  0
 116 #define SETUP_STATE_SETUP 1
 117 #define SETUP_STATE_DATA  2
 118 #define SETUP_STATE_ACK   3
 119 #define SETUP_STATE_PARAM 4
 120
 121 static void do_token_setup(USBDevice *s, USBPacket *p)
 122 {
 123     int request, value, index;
 124
 125     if (p->iov.size != 8) {
 126         p->status = USB_RET_STALL;
 127         return;
 128     }
 129
 130     usb_packet_copy(p, s->setup_buf, p->iov.size);
 131     p->actual_length = 0;
 132     s->setup_len   = (s->setup_buf[7] << 8) | s->setup_buf[6];
 133     s->setup_index = 0;
 134
 135     request = (s->setup_buf[0] << 8) | s->setup_buf[1];
 136     value   = (s->setup_buf[3] << 8) | s->setup_buf[2];
 137     index   = (s->setup_buf[5] << 8) | s->setup_buf[4];
 138
 139     if (s->setup_buf[0] & USB_DIR_IN) {
 140         usb_device_handle_control(s, p, request, value, index,
 141                                   s->setup_len, s->data_buf);
 142         if (p->status == USB_RET_ASYNC) {
 143             s->setup_state = SETUP_STATE_SETUP;
 144         }
 145         if (p->status != USB_RET_SUCCESS) {
 146             return;
 147         }
 148
 149         if (p->actual_length < s->setup_len) {
 150             s->setup_len = p->actual_length;
 151         }
 152         s->setup_state = SETUP_STATE_DATA;
 153     } else {
 154         if (s->setup_len > sizeof(s->data_buf)) {
 155             fprintf(stderr,
 156                 "usb_generic_handle_packet: ctrl buffer too small (%d > %zu)\n",
 157                 s->setup_len, sizeof(s->data_buf));
 158             p->status = USB_RET_STALL;
 159             return;
 160         }
 161         if (s->setup_len == 0)
 162             s->setup_state = SETUP_STATE_ACK;
 163         else
 164             s->setup_state = SETUP_STATE_DATA;
 165     }
 166
 167     p->actual_length = 8;
 168 }
 169
 170 static void do_token_in(USBDevice *s, USBPacket *p)
 171 {
 172     int request, value, index;
 173
 174     assert(p->ep->nr == 0);
 175
 176     request = (s->setup_buf[0] << 8) | s->setup_buf[1];
 177     value   = (s->setup_buf[3] << 8) | s->setup_buf[2];
 178     index   = (s->setup_buf[5] << 8) | s->setup_buf[4];
 179
 180     switch(s->setup_state) {
 181     case SETUP_STATE_ACK:
 182         if (!(s->setup_buf[0] & USB_DIR_IN)) {
 183             usb_device_handle_control(s, p, request, value, index,
 184                                       s->setup_len, s->data_buf);
 185             if (p->status == USB_RET_ASYNC) {
 186                 return;
 187             }
 188             s->setup_state = SETUP_STATE_IDLE;
 189             p->actual_length = 0;
 190         }
 191         break;
 192
 193     case SETUP_STATE_DATA:
 194         if (s->setup_buf[0] & USB_DIR_IN) {
 195             int len = s->setup_len - s->setup_index;
 196             if (len > p->iov.size) {
 197                 len = p->iov.size;
 198             }
 199             usb_packet_copy(p, s->data_buf + s->setup_index, len);
 200             s->setup_index += len;
 201             if (s->setup_index >= s->setup_len) {
 202                 s->setup_state = SETUP_STATE_ACK;
 203             }
 204             return;
 205         }
 206         s->setup_state = SETUP_STATE_IDLE;
 207         p->status = USB_RET_STALL;
 208         break;
 209
 210     default:
 211         p->status = USB_RET_STALL;
 212     }
 213 }
 214
 215 static void do_token_out(USBDevice *s, USBPacket *p)
 216 {
 217     assert(p->ep->nr == 0);
 218
 219     switch(s->setup_state) {
 220     case SETUP_STATE_ACK:
 221         if (s->setup_buf[0] & USB_DIR_IN) {
 222             s->setup_state = SETUP_STATE_IDLE;
 223             /* transfer OK */
 224         } else {
 225             /* ignore additional output */
 226         }
 227         break;
 228
 229     case SETUP_STATE_DATA:
 230         if (!(s->setup_buf[0] & USB_DIR_IN)) {
 231             int len = s->setup_len - s->setup_index;
 232             if (len > p->iov.size) {
 233                 len = p->iov.size;
 234             }
 235             usb_packet_copy(p, s->data_buf + s->setup_index, len);
 236             s->setup_index += len;
 237             if (s->setup_index >= s->setup_len) {
 238                 s->setup_state = SETUP_STATE_ACK;
 239             }
 240             return;
 241         }
 242         s->setup_state = SETUP_STATE_IDLE;
 243         p->status = USB_RET_STALL;
 244         break;
 245
 246     default:
 247         p->status = USB_RET_STALL;
 248     }
 249 }
 250
 251 static void do_parameter(USBDevice *s, USBPacket *p)
 252 {
 253     int i, request, value, index;
 254
 255     for (i = 0; i < 8; i++) {
 256         s->setup_buf[i] = p->parameter >> (i*8);
 257     }
 258
 259     s->setup_state = SETUP_STATE_PARAM;
 260     s->setup_len   = (s->setup_buf[7] << 8) | s->setup_buf[6];
 261     s->setup_index = 0;
 262
 263     request = (s->setup_buf[0] << 8) | s->setup_buf[1];
 264     value   = (s->setup_buf[3] << 8) | s->setup_buf[2];
 265     index   = (s->setup_buf[5] << 8) | s->setup_buf[4];
 266
 267     if (s->setup_len > sizeof(s->data_buf)) {
 268         fprintf(stderr,
 269                 "usb_generic_handle_packet: ctrl buffer too small (%d > %zu)\n",
 270                 s->setup_len, sizeof(s->data_buf));
 271         p->status = USB_RET_STALL;
 272         return;
 273     }
 274
 275     if (p->pid == USB_TOKEN_OUT) {
 276         usb_packet_copy(p, s->data_buf, s->setup_len);
 277     }
 278
 279     usb_device_handle_control(s, p, request, value, index,
 280                               s->setup_len, s->data_buf);
 281     if (p->status == USB_RET_ASYNC) {
 282         return;
 283     }
 284
 285     if (p->actual_length < s->setup_len) {
 286         s->setup_len = p->actual_length;
 287     }
 288     if (p->pid == USB_TOKEN_IN) {
 289         p->actual_length = 0;
 290         usb_packet_copy(p, s->data_buf, s->setup_len);
 291     }
 292 }
 293
 294 /* ctrl complete function for devices which use usb_generic_handle_packet and
 295    may return USB_RET_ASYNC from their handle_control callback. Device code
 296    which does this *must* call this function instead of the normal
 297    usb_packet_complete to complete their async control packets. */
 298 void usb_generic_async_ctrl_complete(USBDevice *s, USBPacket *p)
 299 {
 300     if (p->status < 0) {
 301         s->setup_state = SETUP_STATE_IDLE;
 302     }
 303
 304     switch (s->setup_state) {
 305     case SETUP_STATE_SETUP:
 306         if (p->actual_length < s->setup_len) {
 307             s->setup_len = p->actual_length;
 308         }
 309         s->setup_state = SETUP_STATE_DATA;
 310         p->actual_length = 8;
 311         break;
 312
 313     case SETUP_STATE_ACK:
 314         s->setup_state = SETUP_STATE_IDLE;
 315         p->actual_length = 0;
 316         break;
 317
 318     case SETUP_STATE_PARAM:
 319         if (p->actual_length < s->setup_len) {
 320             s->setup_len = p->actual_length;
 321         }
 322         if (p->pid == USB_TOKEN_IN) {
 323             p->actual_length = 0;
 324             usb_packet_copy(p, s->data_buf, s->setup_len);
 325         }
 326         break;
 327
 328     default:
 329         break;
 330     }
 331     usb_packet_complete(s, p);
 332 }
 333
 334 /* XXX: fix overflow */
 335 int set_usb_string(uint8_t *buf, const char *str)
 336 {
 337     int len, i;
 338     uint8_t *q;
 339
 340     q = buf;
 341     len = strlen(str);
 342     *q++ = 2 * len + 2;
 343     *q++ = 3;
 344     for(i = 0; i < len; i++) {
 345         *q++ = str[i];
 346         *q++ = 0;
 347     }
 348     return q - buf;
 349 }
 350
 351 USBDevice *usb_find_device(USBPort *port, uint8_t addr)
 352 {
 353     USBDevice *dev = port->dev;
 354
 355     if (dev == NULL || !dev->attached || dev->state != USB_STATE_DEFAULT) {
 356         return NULL;
 357     }
 358     if (dev->addr == addr) {
 359         return dev;
 360     }
 361     return usb_device_find_device(dev, addr);
 362 }
 363
 364 static void usb_process_one(USBPacket *p)
 365 {
 366     USBDevice *dev = p->ep->dev;
 367
 368     /*
 369      * Handlers expect status to be initialized to USB_RET_SUCCESS, but it
 370      * can be USB_RET_NAK here from a previous usb_process_one() call,
 371      * or USB_RET_ASYNC from going through usb_queue_one().
 372      */
 373     p->status = USB_RET_SUCCESS;
 374
 375     if (p->ep->nr == 0) {
 376         /* control pipe */
 377         if (p->parameter) {
 378             do_parameter(dev, p);
 379             return;
 380         }
 381         switch (p->pid) {
 382         case USB_TOKEN_SETUP:
 383             do_token_setup(dev, p);
 384             break;
 385         case USB_TOKEN_IN:
 386             do_token_in(dev, p);
 387             break;
 388         case USB_TOKEN_OUT:
 389             do_token_out(dev, p);
 390             break;
 391         default:
 392             p->status = USB_RET_STALL;
 393         }
 394     } else {
 395         /* data pipe */
 396         usb_device_handle_data(dev, p);
 397     }
 398 }
 399
 400 static void usb_queue_one(USBPacket *p)
 401 {
 402     usb_packet_set_state(p, USB_PACKET_QUEUED);
 403     QTAILQ_INSERT_TAIL(&p->ep->queue, p, queue);
 404     p->status = USB_RET_ASYNC;
 405 }
 406
 407 /* Hand over a packet to a device for processing.  p->status ==
 408    USB_RET_ASYNC indicates the processing isn't finished yet, the
 409    driver will call usb_packet_complete() when done processing it. */
 410 void usb_handle_packet(USBDevice *dev, USBPacket *p)
 411 {
 412     if (dev == NULL) {
 413         p->status = USB_RET_NODEV;
 414         return;
 415     }
 416     assert(dev == p->ep->dev);
 417     assert(dev->state == USB_STATE_DEFAULT);
 418     usb_packet_check_state(p, USB_PACKET_SETUP);
 419     assert(p->ep != NULL);
 420
 421     /* Submitting a new packet clears halt */
 422     if (p->ep->halted) {
 423         assert(QTAILQ_EMPTY(&p->ep->queue));
 424         p->ep->halted = false;
 425     }
 426
 427     if (QTAILQ_EMPTY(&p->ep->queue) || p->ep->pipeline || p->stream) {
 428         usb_process_one(p);
 429         if (p->status == USB_RET_ASYNC) {
 430             /* hcd drivers cannot handle async for isoc */
 431             assert(p->ep->type != USB_ENDPOINT_XFER_ISOC);
 432             /* using async for interrupt packets breaks migration */
 433             assert(p->ep->type != USB_ENDPOINT_XFER_INT ||
 434                    (dev->flags & (1 << USB_DEV_FLAG_IS_HOST)));
 435             usb_packet_set_state(p, USB_PACKET_ASYNC);
 436             QTAILQ_INSERT_TAIL(&p->ep->queue, p, queue);
 437         } else if (p->status == USB_RET_ADD_TO_QUEUE) {
 438             usb_queue_one(p);
 439         } else {
 440             /*
 441              * When pipelining is enabled usb-devices must always return async,
 442              * otherwise packets can complete out of order!
 443              */
 444             assert(p->stream || !p->ep->pipeline ||
 445                    QTAILQ_EMPTY(&p->ep->queue));
 446             if (p->status != USB_RET_NAK) {
 447                 usb_packet_set_state(p, USB_PACKET_COMPLETE);
 448             }
 449         }
 450     } else {
 451         usb_queue_one(p);
 452     }
 453 }
 454
 455 void usb_packet_complete_one(USBDevice *dev, USBPacket *p)
 456 {
 457     USBEndpoint *ep = p->ep;
 458
 459     assert(p->stream || QTAILQ_FIRST(&ep->queue) == p);
 460     assert(p->status != USB_RET_ASYNC && p->status != USB_RET_NAK);
 461
 462     if (p->status != USB_RET_SUCCESS ||
 463             (p->short_not_ok && (p->actual_length < p->iov.size))) {
 464         ep->halted = true;
 465     }
 466     usb_packet_set_state(p, USB_PACKET_COMPLETE);
 467     QTAILQ_REMOVE(&ep->queue, p, queue);
 468     dev->port->ops->complete(dev->port, p);
 469 }
 470
 471 /* Notify the controller that an async packet is complete.  This should only
 472    be called for packets previously deferred by returning USB_RET_ASYNC from
 473    handle_packet. */
 474 void usb_packet_complete(USBDevice *dev, USBPacket *p)
 475 {
 476     USBEndpoint *ep = p->ep;
 477
 478     usb_packet_check_state(p, USB_PACKET_ASYNC);
 479     usb_packet_complete_one(dev, p);
 480
 481     while (!QTAILQ_EMPTY(&ep->queue)) {
 482         p = QTAILQ_FIRST(&ep->queue);
 483         if (ep->halted) {
 484             /* Empty the queue on a halt */
 485             p->status = USB_RET_REMOVE_FROM_QUEUE;
 486             dev->port->ops->complete(dev->port, p);
 487             continue;
 488         }
 489         if (p->state == USB_PACKET_ASYNC) {
 490             break;
 491         }
 492         usb_packet_check_state(p, USB_PACKET_QUEUED);
 493         usb_process_one(p);
 494         if (p->status == USB_RET_ASYNC) {
 495             usb_packet_set_state(p, USB_PACKET_ASYNC);
 496             break;
 497         }
 498         usb_packet_complete_one(ep->dev, p);
 499     }
 500 }
 501
 502 /* Cancel an active packet.  The packed must have been deferred by
 503    returning USB_RET_ASYNC from handle_packet, and not yet
 504    completed.  */
 505 void usb_cancel_packet(USBPacket * p)
 506 {
 507     bool callback = (p->state == USB_PACKET_ASYNC);
 508     assert(usb_packet_is_inflight(p));
 509     usb_packet_set_state(p, USB_PACKET_CANCELED);
 510     QTAILQ_REMOVE(&p->ep->queue, p, queue);
 511     if (callback) {
 512         usb_device_cancel_packet(p->ep->dev, p);
 513     }
 514 }
 515
 516
 517 void usb_packet_init(USBPacket *p)
 518 {
 519     qemu_iovec_init(&p->iov, 1);
 520 }
 521
 522 static const char *usb_packet_state_name(USBPacketState state)
 523 {
 524     static const char *name[] = {
 525         [USB_PACKET_UNDEFINED] = "undef",
 526         [USB_PACKET_SETUP]     = "setup",
 527         [USB_PACKET_QUEUED]    = "queued",
 528         [USB_PACKET_ASYNC]     = "async",
 529         [USB_PACKET_COMPLETE]  = "complete",
 530         [USB_PACKET_CANCELED]  = "canceled",
 531     };
 532     if (state < ARRAY_SIZE(name)) {
 533         return name[state];
 534     }
 535     return "INVALID";
 536 }
 537
 538 void usb_packet_check_state(USBPacket *p, USBPacketState expected)
 539 {
 540     USBDevice *dev;
 541     USBBus *bus;
 542
 543     if (p->state == expected) {
 544         return;
 545     }
 546     dev = p->ep->dev;
 547     bus = usb_bus_from_device(dev);
 548     trace_usb_packet_state_fault(bus->busnr, dev->port->path, p->ep->nr, p,
 549                                  usb_packet_state_name(p->state),
 550                                  usb_packet_state_name(expected));
 551     assert(!"usb packet state check failed");
 552 }
 553
 554 void usb_packet_set_state(USBPacket *p, USBPacketState state)
 555 {
 556     if (p->ep) {
 557         USBDevice *dev = p->ep->dev;
 558         USBBus *bus = usb_bus_from_device(dev);
 559         trace_usb_packet_state_change(bus->busnr, dev->port->path, p->ep->nr, p,
 560                                       usb_packet_state_name(p->state),
 561                                       usb_packet_state_name(state));
 562     } else {
 563         trace_usb_packet_state_change(-1, "", -1, p,
 564                                       usb_packet_state_name(p->state),
 565                                       usb_packet_state_name(state));
 566     }
 567     p->state = state;
 568 }
 569
 570 void usb_packet_setup(USBPacket *p, int pid,
 571                       USBEndpoint *ep, unsigned int stream,
 572                       uint64_t id, bool short_not_ok, bool int_req)
 573 {
 574     assert(!usb_packet_is_inflight(p));
 575     assert(p->iov.iov != NULL);
 576     p->id = id;
 577     p->pid = pid;
 578     p->ep = ep;
 579     p->stream = stream;
 580     p->status = USB_RET_SUCCESS;
 581     p->actual_length = 0;
 582     p->parameter = 0;
 583     p->short_not_ok = short_not_ok;
 584     p->int_req = int_req;
 585     p->combined = NULL;
 586     qemu_iovec_reset(&p->iov);
 587     usb_packet_set_state(p, USB_PACKET_SETUP);
 588 }
 589
 590 void usb_packet_addbuf(USBPacket *p, void *ptr, size_t len)
 591 {
 592     qemu_iovec_add(&p->iov, ptr, len);
 593 }
 594
 595 void usb_packet_copy(USBPacket *p, void *ptr, size_t bytes)
 596 {
 597     QEMUIOVector *iov = p->combined ? &p->combined->iov : &p->iov;
 598
 599     assert(p->actual_length >= 0);
 600     assert(p->actual_length + bytes <= iov->size);
 601     switch (p->pid) {
 602     case USB_TOKEN_SETUP:
 603     case USB_TOKEN_OUT:
 604         iov_to_buf(iov->iov, iov->niov, p->actual_length, ptr, bytes);
 605         break;
 606     case USB_TOKEN_IN:
 607         iov_from_buf(iov->iov, iov->niov, p->actual_length, ptr, bytes);
 608         break;
 609     default:
 610         fprintf(stderr, "%s: invalid pid: %x\n", __func__, p->pid);
 611         abort();
 612     }
 613     p->actual_length += bytes;
 614 }
 615
 616 void usb_packet_skip(USBPacket *p, size_t bytes)
 617 {
 618     QEMUIOVector *iov = p->combined ? &p->combined->iov : &p->iov;
 619
 620     assert(p->actual_length >= 0);
 621     assert(p->actual_length + bytes <= iov->size);
 622     if (p->pid == USB_TOKEN_IN) {
 623         iov_memset(iov->iov, iov->niov, p->actual_length, 0, bytes);
 624     }
 625     p->actual_length += bytes;
 626 }
 627
 628 size_t usb_packet_size(USBPacket *p)
 629 {
 630     return p->combined ? p->combined->iov.size : p->iov.size;
 631 }
 632
 633 void usb_packet_cleanup(USBPacket *p)
 634 {
 635     assert(!usb_packet_is_inflight(p));
 636     qemu_iovec_destroy(&p->iov);
 637 }
 638
 639 void usb_ep_reset(USBDevice *dev)
 640 {
 641     int ep;
 642
 643     dev->ep_ctl.nr = 0;
 644     dev->ep_ctl.type = USB_ENDPOINT_XFER_CONTROL;
 645     dev->ep_ctl.ifnum = 0;
 646     dev->ep_ctl.max_packet_size = 64;
 647     dev->ep_ctl.max_streams = 0;
 648     dev->ep_ctl.dev = dev;
 649     dev->ep_ctl.pipeline = false;
 650     for (ep = 0; ep < USB_MAX_ENDPOINTS; ep++) {
 651         dev->ep_in[ep].nr = ep + 1;
 652         dev->ep_out[ep].nr = ep + 1;
 653         dev->ep_in[ep].pid = USB_TOKEN_IN;
 654         dev->ep_out[ep].pid = USB_TOKEN_OUT;
 655         dev->ep_in[ep].type = USB_ENDPOINT_XFER_INVALID;
 656         dev->ep_out[ep].type = USB_ENDPOINT_XFER_INVALID;
 657         dev->ep_in[ep].ifnum = USB_INTERFACE_INVALID;
 658         dev->ep_out[ep].ifnum = USB_INTERFACE_INVALID;
 659         dev->ep_in[ep].max_packet_size = 0;
 660         dev->ep_out[ep].max_packet_size = 0;
 661         dev->ep_in[ep].max_streams = 0;
 662         dev->ep_out[ep].max_streams = 0;
 663         dev->ep_in[ep].dev = dev;
 664         dev->ep_out[ep].dev = dev;
 665         dev->ep_in[ep].pipeline = false;
 666         dev->ep_out[ep].pipeline = false;
 667     }
 668 }
 669
 670 void usb_ep_init(USBDevice *dev)
 671 {
 672     int ep;
 673
 674     usb_ep_reset(dev);
 675     QTAILQ_INIT(&dev->ep_ctl.queue);
 676     for (ep = 0; ep < USB_MAX_ENDPOINTS; ep++) {
 677         QTAILQ_INIT(&dev->ep_in[ep].queue);
 678         QTAILQ_INIT(&dev->ep_out[ep].queue);
 679     }
 680 }
 681
 682 void usb_ep_dump(USBDevice *dev)
 683 {
 684     static const char *tname[] = {
 685         [USB_ENDPOINT_XFER_CONTROL] = "control",
 686         [USB_ENDPOINT_XFER_ISOC]    = "isoc",
 687         [USB_ENDPOINT_XFER_BULK]    = "bulk",
 688         [USB_ENDPOINT_XFER_INT]     = "int",
 689     };
 690     int ifnum, ep, first;
 691
 692     fprintf(stderr, "Device \"%s\", config %d\n",
 693             dev->product_desc, dev->configuration);
 694     for (ifnum = 0; ifnum < 16; ifnum++) {
 695         first = 1;
 696         for (ep = 0; ep < USB_MAX_ENDPOINTS; ep++) {
 697             if (dev->ep_in[ep].type != USB_ENDPOINT_XFER_INVALID &&
 698                 dev->ep_in[ep].ifnum == ifnum) {
 699                 if (first) {
 700                     first = 0;
 701                     fprintf(stderr, "  Interface %d, alternative %d\n",
 702                             ifnum, dev->altsetting[ifnum]);
 703                 }
 704                 fprintf(stderr, "    Endpoint %d, IN, %s, %d max\n", ep,
 705                         tname[dev->ep_in[ep].type],
 706                         dev->ep_in[ep].max_packet_size);
 707             }
 708             if (dev->ep_out[ep].type != USB_ENDPOINT_XFER_INVALID &&
 709                 dev->ep_out[ep].ifnum == ifnum) {
 710                 if (first) {
 711                     first = 0;
 712                     fprintf(stderr, "  Interface %d, alternative %d\n",
 713                             ifnum, dev->altsetting[ifnum]);
 714                 }
 715                 fprintf(stderr, "    Endpoint %d, OUT, %s, %d max\n", ep,
 716                         tname[dev->ep_out[ep].type],
 717                         dev->ep_out[ep].max_packet_size);
 718             }
 719         }
 720     }
 721     fprintf(stderr, "--\n");
 722 }
 723
 724 struct USBEndpoint *usb_ep_get(USBDevice *dev, int pid, int ep)
 725 {
 726     struct USBEndpoint *eps;
 727
 728     if (dev == NULL) {
 729         return NULL;
 730     }
 731     eps = (pid == USB_TOKEN_IN) ? dev->ep_in : dev->ep_out;
 732     if (ep == 0) {
 733         return &dev->ep_ctl;
 734     }
 735     assert(pid == USB_TOKEN_IN || pid == USB_TOKEN_OUT);
 736     assert(ep > 0 && ep <= USB_MAX_ENDPOINTS);
 737     return eps + ep - 1;
 738 }
 739
 740 uint8_t usb_ep_get_type(USBDevice *dev, int pid, int ep)
 741 {
 742     struct USBEndpoint *uep = usb_ep_get(dev, pid, ep);
 743     return uep->type;
 744 }
 745
 746 void usb_ep_set_type(USBDevice *dev, int pid, int ep, uint8_t type)
 747 {
 748     struct USBEndpoint *uep = usb_ep_get(dev, pid, ep);
 749     uep->type = type;
 750 }
 751
 752 uint8_t usb_ep_get_ifnum(USBDevice *dev, int pid, int ep)
 753 {
 754     struct USBEndpoint *uep = usb_ep_get(dev, pid, ep);
 755     return uep->ifnum;
 756 }
 757
 758 void usb_ep_set_ifnum(USBDevice *dev, int pid, int ep, uint8_t ifnum)
 759 {
 760     struct USBEndpoint *uep = usb_ep_get(dev, pid, ep);
 761     uep->ifnum = ifnum;
 762 }
 763
 764 void usb_ep_set_max_packet_size(USBDevice *dev, int pid, int ep,
 765                                 uint16_t raw)
 766 {
 767     struct USBEndpoint *uep = usb_ep_get(dev, pid, ep);
 768     int size, microframes;
 769
 770     size = raw & 0x7ff;
 771     switch ((raw >> 11) & 3) {
 772     case 1:
 773         microframes = 2;
 774         break;
 775     case 2:
 776         microframes = 3;
 777         break;
 778     default:
 779         microframes = 1;
 780         break;
 781     }
 782     uep->max_packet_size = size * microframes;
 783 }
 784
 785 int usb_ep_get_max_packet_size(USBDevice *dev, int pid, int ep)
 786 {
 787     struct USBEndpoint *uep = usb_ep_get(dev, pid, ep);
 788     return uep->max_packet_size;
 789 }
 790
 791 void usb_ep_set_max_streams(USBDevice *dev, int pid, int ep, uint8_t raw)
 792 {
 793     struct USBEndpoint *uep = usb_ep_get(dev, pid, ep);
 794     int MaxStreams;
 795
 796     MaxStreams = raw & 0x1f;
 797     if (MaxStreams) {
 798         uep->max_streams = 1 << MaxStreams;
 799     } else {
 800         uep->max_streams = 0;
 801     }
 802 }
 803
 804 int usb_ep_get_max_streams(USBDevice *dev, int pid, int ep)
 805 {
 806     struct USBEndpoint *uep = usb_ep_get(dev, pid, ep);
 807     return uep->max_streams;
 808 }
 809
 810 void usb_ep_set_pipeline(USBDevice *dev, int pid, int ep, bool enabled)
 811 {
 812     struct USBEndpoint *uep = usb_ep_get(dev, pid, ep);
 813     uep->pipeline = enabled;
 814 }
 815
 816 void usb_ep_set_halted(USBDevice *dev, int pid, int ep, bool halted)
 817 {
 818     struct USBEndpoint *uep = usb_ep_get(dev, pid, ep);
 819     uep->halted = halted;
 820 }
 821
 822 USBPacket *usb_ep_find_packet_by_id(USBDevice *dev, int pid, int ep,
 823                                     uint64_t id)
 824 {
 825     struct USBEndpoint *uep = usb_ep_get(dev, pid, ep);
 826     USBPacket *p;
 827
 828     QTAILQ_FOREACH(p, &uep->queue, queue) {
 829         if (p->id == id) {
 830             return p;
 831         }
 832     }
 833
 834     return NULL;
 835 }