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