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 "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)
  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);
  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 int do_token_setup(USBDevice *s, USBPacket *p)
 101 {
 102     int request, value, index;
 103     int ret = 0;
 104
 105     if (p->iov.size != 8) {
 106         return USB_RET_STALL;
 107     }
 108
 109     usb_packet_copy(p, s->setup_buf, p->iov.size);
 110     p->result = 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         ret = usb_device_handle_control(s, p, request, value, index,
 120                                         s->setup_len, s->data_buf);
 121         if (ret == USB_RET_ASYNC) {
 122              s->setup_state = SETUP_STATE_SETUP;
 123              return USB_RET_ASYNC;
 124         }
 125         if (ret < 0)
 126             return ret;
 127
 128         if (ret < s->setup_len)
 129             s->setup_len = ret;
 130         s->setup_state = SETUP_STATE_DATA;
 131     } else {
 132         if (s->setup_len > sizeof(s->data_buf)) {
 133             fprintf(stderr,
 134                 "usb_generic_handle_packet: ctrl buffer too small (%d > %zu)\n",
 135                 s->setup_len, sizeof(s->data_buf));
 136             return USB_RET_STALL;
 137         }
 138         if (s->setup_len == 0)
 139             s->setup_state = SETUP_STATE_ACK;
 140         else
 141             s->setup_state = SETUP_STATE_DATA;
 142     }
 143
 144     return ret;
 145 }
 146
 147 static int do_token_in(USBDevice *s, USBPacket *p)
 148 {
 149     int request, value, index;
 150     int ret = 0;
 151
 152     assert(p->ep->nr == 0);
 153
 154     request = (s->setup_buf[0] << 8) | s->setup_buf[1];
 155     value   = (s->setup_buf[3] << 8) | s->setup_buf[2];
 156     index   = (s->setup_buf[5] << 8) | s->setup_buf[4];
 157
 158     switch(s->setup_state) {
 159     case SETUP_STATE_ACK:
 160         if (!(s->setup_buf[0] & USB_DIR_IN)) {
 161             ret = usb_device_handle_control(s, p, request, value, index,
 162                                             s->setup_len, s->data_buf);
 163             if (ret == USB_RET_ASYNC) {
 164                 return USB_RET_ASYNC;
 165             }
 166             s->setup_state = SETUP_STATE_IDLE;
 167             if (ret > 0)
 168                 return 0;
 169             return ret;
 170         }
 171
 172         /* return 0 byte */
 173         return 0;
 174
 175     case SETUP_STATE_DATA:
 176         if (s->setup_buf[0] & USB_DIR_IN) {
 177             int len = s->setup_len - s->setup_index;
 178             if (len > p->iov.size) {
 179                 len = p->iov.size;
 180             }
 181             usb_packet_copy(p, s->data_buf + s->setup_index, len);
 182             s->setup_index += len;
 183             if (s->setup_index >= s->setup_len)
 184                 s->setup_state = SETUP_STATE_ACK;
 185             return len;
 186         }
 187
 188         s->setup_state = SETUP_STATE_IDLE;
 189         return USB_RET_STALL;
 190
 191     default:
 192         return USB_RET_STALL;
 193     }
 194 }
 195
 196 static int do_token_out(USBDevice *s, USBPacket *p)
 197 {
 198     assert(p->ep->nr == 0);
 199
 200     switch(s->setup_state) {
 201     case SETUP_STATE_ACK:
 202         if (s->setup_buf[0] & USB_DIR_IN) {
 203             s->setup_state = SETUP_STATE_IDLE;
 204             /* transfer OK */
 205         } else {
 206             /* ignore additional output */
 207         }
 208         return 0;
 209
 210     case SETUP_STATE_DATA:
 211         if (!(s->setup_buf[0] & USB_DIR_IN)) {
 212             int len = s->setup_len - s->setup_index;
 213             if (len > p->iov.size) {
 214                 len = p->iov.size;
 215             }
 216             usb_packet_copy(p, s->data_buf + s->setup_index, len);
 217             s->setup_index += len;
 218             if (s->setup_index >= s->setup_len)
 219                 s->setup_state = SETUP_STATE_ACK;
 220             return len;
 221         }
 222
 223         s->setup_state = SETUP_STATE_IDLE;
 224         return USB_RET_STALL;
 225
 226     default:
 227         return USB_RET_STALL;
 228     }
 229 }
 230
 231 static int do_parameter(USBDevice *s, USBPacket *p)
 232 {
 233     int request, value, index;
 234     int i, ret = 0;
 235
 236     for (i = 0; i < 8; i++) {
 237         s->setup_buf[i] = p->parameter >> (i*8);
 238     }
 239
 240     s->setup_state = SETUP_STATE_PARAM;
 241     s->setup_len   = (s->setup_buf[7] << 8) | s->setup_buf[6];
 242     s->setup_index = 0;
 243
 244     request = (s->setup_buf[0] << 8) | s->setup_buf[1];
 245     value   = (s->setup_buf[3] << 8) | s->setup_buf[2];
 246     index   = (s->setup_buf[5] << 8) | s->setup_buf[4];
 247
 248     if (s->setup_len > sizeof(s->data_buf)) {
 249         fprintf(stderr,
 250                 "usb_generic_handle_packet: ctrl buffer too small (%d > %zu)\n",
 251                 s->setup_len, sizeof(s->data_buf));
 252         return USB_RET_STALL;
 253     }
 254
 255     if (p->pid == USB_TOKEN_OUT) {
 256         usb_packet_copy(p, s->data_buf, s->setup_len);
 257     }
 258
 259     ret = usb_device_handle_control(s, p, request, value, index,
 260                                     s->setup_len, s->data_buf);
 261     if (ret < 0) {
 262         return ret;
 263     }
 264
 265     if (ret < s->setup_len) {
 266         s->setup_len = ret;
 267     }
 268     if (p->pid == USB_TOKEN_IN) {
 269         usb_packet_copy(p, s->data_buf, s->setup_len);
 270     }
 271
 272     return ret;
 273 }
 274
 275 /* ctrl complete function for devices which use usb_generic_handle_packet and
 276    may return USB_RET_ASYNC from their handle_control callback. Device code
 277    which does this *must* call this function instead of the normal
 278    usb_packet_complete to complete their async control packets. */
 279 void usb_generic_async_ctrl_complete(USBDevice *s, USBPacket *p)
 280 {
 281     if (p->result < 0) {
 282         s->setup_state = SETUP_STATE_IDLE;
 283     }
 284
 285     switch (s->setup_state) {
 286     case SETUP_STATE_SETUP:
 287         if (p->result < s->setup_len) {
 288             s->setup_len = p->result;
 289         }
 290         s->setup_state = SETUP_STATE_DATA;
 291         p->result = 8;
 292         break;
 293
 294     case SETUP_STATE_ACK:
 295         s->setup_state = SETUP_STATE_IDLE;
 296         p->result = 0;
 297         break;
 298
 299     case SETUP_STATE_PARAM:
 300         if (p->result < s->setup_len) {
 301             s->setup_len = p->result;
 302         }
 303         if (p->pid == USB_TOKEN_IN) {
 304             p->result = 0;
 305             usb_packet_copy(p, s->data_buf, s->setup_len);
 306         }
 307         break;
 308
 309     default:
 310         break;
 311     }
 312     usb_packet_complete(s, p);
 313 }
 314
 315 /* XXX: fix overflow */
 316 int set_usb_string(uint8_t *buf, const char *str)
 317 {
 318     int len, i;
 319     uint8_t *q;
 320
 321     q = buf;
 322     len = strlen(str);
 323     *q++ = 2 * len + 2;
 324     *q++ = 3;
 325     for(i = 0; i < len; i++) {
 326         *q++ = str[i];
 327         *q++ = 0;
 328     }
 329     return q - buf;
 330 }
 331
 332 USBDevice *usb_find_device(USBPort *port, uint8_t addr)
 333 {
 334     USBDevice *dev = port->dev;
 335
 336     if (dev == NULL || !dev->attached || dev->state != USB_STATE_DEFAULT) {
 337         return NULL;
 338     }
 339     if (dev->addr == addr) {
 340         return dev;
 341     }
 342     return usb_device_find_device(dev, addr);
 343 }
 344
 345 static int usb_process_one(USBPacket *p)
 346 {
 347     USBDevice *dev = p->ep->dev;
 348
 349     if (p->ep->nr == 0) {
 350         /* control pipe */
 351         if (p->parameter) {
 352             return do_parameter(dev, p);
 353         }
 354         switch (p->pid) {
 355         case USB_TOKEN_SETUP:
 356             return do_token_setup(dev, p);
 357         case USB_TOKEN_IN:
 358             return do_token_in(dev, p);
 359         case USB_TOKEN_OUT:
 360             return do_token_out(dev, p);
 361         default:
 362             return USB_RET_STALL;
 363         }
 364     } else {
 365         /* data pipe */
 366         return usb_device_handle_data(dev, p);
 367     }
 368 }
 369
 370 /* Hand over a packet to a device for processing.  Return value
 371    USB_RET_ASYNC indicates the processing isn't finished yet, the
 372    driver will call usb_packet_complete() when done processing it. */
 373 int usb_handle_packet(USBDevice *dev, USBPacket *p)
 374 {
 375     int ret;
 376
 377     if (dev == NULL) {
 378         return USB_RET_NODEV;
 379     }
 380     assert(dev == p->ep->dev);
 381     assert(dev->state == USB_STATE_DEFAULT);
 382     usb_packet_check_state(p, USB_PACKET_SETUP);
 383     assert(p->ep != NULL);
 384
 385     if (QTAILQ_EMPTY(&p->ep->queue) || p->ep->pipeline) {
 386         ret = usb_process_one(p);
 387         if (ret == USB_RET_ASYNC) {
 388             usb_packet_set_state(p, USB_PACKET_ASYNC);
 389             QTAILQ_INSERT_TAIL(&p->ep->queue, p, queue);
 390         } else {
 391             p->result = ret;
 392             usb_packet_set_state(p, USB_PACKET_COMPLETE);
 393         }
 394     } else {
 395         ret = USB_RET_ASYNC;
 396         usb_packet_set_state(p, USB_PACKET_QUEUED);
 397         QTAILQ_INSERT_TAIL(&p->ep->queue, p, queue);
 398     }
 399     return ret;
 400 }
 401
 402 /* Notify the controller that an async packet is complete.  This should only
 403    be called for packets previously deferred by returning USB_RET_ASYNC from
 404    handle_packet. */
 405 void usb_packet_complete(USBDevice *dev, USBPacket *p)
 406 {
 407     USBEndpoint *ep = p->ep;
 408     int ret;
 409
 410     usb_packet_check_state(p, USB_PACKET_ASYNC);
 411     assert(QTAILQ_FIRST(&ep->queue) == p);
 412     usb_packet_set_state(p, USB_PACKET_COMPLETE);
 413     QTAILQ_REMOVE(&ep->queue, p, queue);
 414     dev->port->ops->complete(dev->port, p);
 415
 416     while (!QTAILQ_EMPTY(&ep->queue)) {
 417         p = QTAILQ_FIRST(&ep->queue);
 418         if (p->state == USB_PACKET_ASYNC) {
 419             break;
 420         }
 421         usb_packet_check_state(p, USB_PACKET_QUEUED);
 422         ret = usb_process_one(p);
 423         if (ret == USB_RET_ASYNC) {
 424             usb_packet_set_state(p, USB_PACKET_ASYNC);
 425             break;
 426         }
 427         p->result = ret;
 428         usb_packet_set_state(p, USB_PACKET_COMPLETE);
 429         QTAILQ_REMOVE(&ep->queue, p, queue);
 430         dev->port->ops->complete(dev->port, p);
 431     }
 432 }
 433
 434 /* Cancel an active packet.  The packed must have been deferred by
 435    returning USB_RET_ASYNC from handle_packet, and not yet
 436    completed.  */
 437 void usb_cancel_packet(USBPacket * p)
 438 {
 439     bool callback = (p->state == USB_PACKET_ASYNC);
 440     assert(usb_packet_is_inflight(p));
 441     usb_packet_set_state(p, USB_PACKET_CANCELED);
 442     QTAILQ_REMOVE(&p->ep->queue, p, queue);
 443     if (callback) {
 444         usb_device_cancel_packet(p->ep->dev, p);
 445     }
 446 }
 447
 448
 449 void usb_packet_init(USBPacket *p)
 450 {
 451     qemu_iovec_init(&p->iov, 1);
 452 }
 453
 454 static const char *usb_packet_state_name(USBPacketState state)
 455 {
 456     static const char *name[] = {
 457         [USB_PACKET_UNDEFINED] = "undef",
 458         [USB_PACKET_SETUP]     = "setup",
 459         [USB_PACKET_QUEUED]    = "queued",
 460         [USB_PACKET_ASYNC]     = "async",
 461         [USB_PACKET_COMPLETE]  = "complete",
 462         [USB_PACKET_CANCELED]  = "canceled",
 463     };
 464     if (state < ARRAY_SIZE(name)) {
 465         return name[state];
 466     }
 467     return "INVALID";
 468 }
 469
 470 void usb_packet_check_state(USBPacket *p, USBPacketState expected)
 471 {
 472     USBDevice *dev;
 473     USBBus *bus;
 474
 475     if (p->state == expected) {
 476         return;
 477     }
 478     dev = p->ep->dev;
 479     bus = usb_bus_from_device(dev);
 480     trace_usb_packet_state_fault(bus->busnr, dev->port->path, p->ep->nr, p,
 481                                  usb_packet_state_name(p->state),
 482                                  usb_packet_state_name(expected));
 483     assert(!"usb packet state check failed");
 484 }
 485
 486 void usb_packet_set_state(USBPacket *p, USBPacketState state)
 487 {
 488     if (p->ep) {
 489         USBDevice *dev = p->ep->dev;
 490         USBBus *bus = usb_bus_from_device(dev);
 491         trace_usb_packet_state_change(bus->busnr, dev->port->path, p->ep->nr, p,
 492                                       usb_packet_state_name(p->state),
 493                                       usb_packet_state_name(state));
 494     } else {
 495         trace_usb_packet_state_change(-1, "", -1, p,
 496                                       usb_packet_state_name(p->state),
 497                                       usb_packet_state_name(state));
 498     }
 499     p->state = state;
 500 }
 501
 502 void usb_packet_setup(USBPacket *p, int pid, USBEndpoint *ep)
 503 {
 504     assert(!usb_packet_is_inflight(p));
 505     assert(p->iov.iov != NULL);
 506     p->pid = pid;
 507     p->ep = ep;
 508     p->result = 0;
 509     p->parameter = 0;
 510     qemu_iovec_reset(&p->iov);
 511     usb_packet_set_state(p, USB_PACKET_SETUP);
 512 }
 513
 514 void usb_packet_addbuf(USBPacket *p, void *ptr, size_t len)
 515 {
 516     qemu_iovec_add(&p->iov, ptr, len);
 517 }
 518
 519 void usb_packet_copy(USBPacket *p, void *ptr, size_t bytes)
 520 {
 521     assert(p->result >= 0);
 522     assert(p->result + bytes <= p->iov.size);
 523     switch (p->pid) {
 524     case USB_TOKEN_SETUP:
 525     case USB_TOKEN_OUT:
 526         iov_to_buf(p->iov.iov, p->iov.niov, p->result, ptr, bytes);
 527         break;
 528     case USB_TOKEN_IN:
 529         iov_from_buf(p->iov.iov, p->iov.niov, p->result, ptr, bytes);
 530         break;
 531     default:
 532         fprintf(stderr, "%s: invalid pid: %x\n", __func__, p->pid);
 533         abort();
 534     }
 535     p->result += bytes;
 536 }
 537
 538 void usb_packet_skip(USBPacket *p, size_t bytes)
 539 {
 540     assert(p->result >= 0);
 541     assert(p->result + bytes <= p->iov.size);
 542     if (p->pid == USB_TOKEN_IN) {
 543         iov_memset(p->iov.iov, p->iov.niov, p->result, 0, bytes);
 544     }
 545     p->result += bytes;
 546 }
 547
 548 void usb_packet_cleanup(USBPacket *p)
 549 {
 550     assert(!usb_packet_is_inflight(p));
 551     qemu_iovec_destroy(&p->iov);
 552 }
 553
 554 void usb_ep_reset(USBDevice *dev)
 555 {
 556     int ep;
 557
 558     dev->ep_ctl.nr = 0;
 559     dev->ep_ctl.type = USB_ENDPOINT_XFER_CONTROL;
 560     dev->ep_ctl.ifnum = 0;
 561     dev->ep_ctl.dev = dev;
 562     dev->ep_ctl.pipeline = false;
 563     for (ep = 0; ep < USB_MAX_ENDPOINTS; ep++) {
 564         dev->ep_in[ep].nr = ep + 1;
 565         dev->ep_out[ep].nr = ep + 1;
 566         dev->ep_in[ep].pid = USB_TOKEN_IN;
 567         dev->ep_out[ep].pid = USB_TOKEN_OUT;
 568         dev->ep_in[ep].type = USB_ENDPOINT_XFER_INVALID;
 569         dev->ep_out[ep].type = USB_ENDPOINT_XFER_INVALID;
 570         dev->ep_in[ep].ifnum = USB_INTERFACE_INVALID;
 571         dev->ep_out[ep].ifnum = USB_INTERFACE_INVALID;
 572         dev->ep_in[ep].dev = dev;
 573         dev->ep_out[ep].dev = dev;
 574         dev->ep_in[ep].pipeline = false;
 575         dev->ep_out[ep].pipeline = false;
 576     }
 577 }
 578
 579 void usb_ep_init(USBDevice *dev)
 580 {
 581     int ep;
 582
 583     usb_ep_reset(dev);
 584     QTAILQ_INIT(&dev->ep_ctl.queue);
 585     for (ep = 0; ep < USB_MAX_ENDPOINTS; ep++) {
 586         QTAILQ_INIT(&dev->ep_in[ep].queue);
 587         QTAILQ_INIT(&dev->ep_out[ep].queue);
 588     }
 589 }
 590
 591 void usb_ep_dump(USBDevice *dev)
 592 {
 593     static const char *tname[] = {
 594         [USB_ENDPOINT_XFER_CONTROL] = "control",
 595         [USB_ENDPOINT_XFER_ISOC]    = "isoc",
 596         [USB_ENDPOINT_XFER_BULK]    = "bulk",
 597         [USB_ENDPOINT_XFER_INT]     = "int",
 598     };
 599     int ifnum, ep, first;
 600
 601     fprintf(stderr, "Device \"%s\", config %d\n",
 602             dev->product_desc, dev->configuration);
 603     for (ifnum = 0; ifnum < 16; ifnum++) {
 604         first = 1;
 605         for (ep = 0; ep < USB_MAX_ENDPOINTS; ep++) {
 606             if (dev->ep_in[ep].type != USB_ENDPOINT_XFER_INVALID &&
 607                 dev->ep_in[ep].ifnum == ifnum) {
 608                 if (first) {
 609                     first = 0;
 610                     fprintf(stderr, "  Interface %d, alternative %d\n",
 611                             ifnum, dev->altsetting[ifnum]);
 612                 }
 613                 fprintf(stderr, "    Endpoint %d, IN, %s, %d max\n", ep,
 614                         tname[dev->ep_in[ep].type],
 615                         dev->ep_in[ep].max_packet_size);
 616             }
 617             if (dev->ep_out[ep].type != USB_ENDPOINT_XFER_INVALID &&
 618                 dev->ep_out[ep].ifnum == ifnum) {
 619                 if (first) {
 620                     first = 0;
 621                     fprintf(stderr, "  Interface %d, alternative %d\n",
 622                             ifnum, dev->altsetting[ifnum]);
 623                 }
 624                 fprintf(stderr, "    Endpoint %d, OUT, %s, %d max\n", ep,
 625                         tname[dev->ep_out[ep].type],
 626                         dev->ep_out[ep].max_packet_size);
 627             }
 628         }
 629     }
 630     fprintf(stderr, "--\n");
 631 }
 632
 633 struct USBEndpoint *usb_ep_get(USBDevice *dev, int pid, int ep)
 634 {
 635     struct USBEndpoint *eps;
 636
 637     if (dev == NULL) {
 638         return NULL;
 639     }
 640     eps = (pid == USB_TOKEN_IN) ? dev->ep_in : dev->ep_out;
 641     if (ep == 0) {
 642         return &dev->ep_ctl;
 643     }
 644     assert(pid == USB_TOKEN_IN || pid == USB_TOKEN_OUT);
 645     assert(ep > 0 && ep <= USB_MAX_ENDPOINTS);
 646     return eps + ep - 1;
 647 }
 648
 649 uint8_t usb_ep_get_type(USBDevice *dev, int pid, int ep)
 650 {
 651     struct USBEndpoint *uep = usb_ep_get(dev, pid, ep);
 652     return uep->type;
 653 }
 654
 655 void usb_ep_set_type(USBDevice *dev, int pid, int ep, uint8_t type)
 656 {
 657     struct USBEndpoint *uep = usb_ep_get(dev, pid, ep);
 658     uep->type = type;
 659 }
 660
 661 uint8_t usb_ep_get_ifnum(USBDevice *dev, int pid, int ep)
 662 {
 663     struct USBEndpoint *uep = usb_ep_get(dev, pid, ep);
 664     return uep->ifnum;
 665 }
 666
 667 void usb_ep_set_ifnum(USBDevice *dev, int pid, int ep, uint8_t ifnum)
 668 {
 669     struct USBEndpoint *uep = usb_ep_get(dev, pid, ep);
 670     uep->ifnum = ifnum;
 671 }
 672
 673 void usb_ep_set_max_packet_size(USBDevice *dev, int pid, int ep,
 674                                 uint16_t raw)
 675 {
 676     struct USBEndpoint *uep = usb_ep_get(dev, pid, ep);
 677     int size, microframes;
 678
 679     size = raw & 0x7ff;
 680     switch ((raw >> 11) & 3) {
 681     case 1:
 682         microframes = 2;
 683         break;
 684     case 2:
 685         microframes = 3;
 686         break;
 687     default:
 688         microframes = 1;
 689         break;
 690     }
 691     uep->max_packet_size = size * microframes;
 692 }
 693
 694 int usb_ep_get_max_packet_size(USBDevice *dev, int pid, int ep)
 695 {
 696     struct USBEndpoint *uep = usb_ep_get(dev, pid, ep);
 697     return uep->max_packet_size;
 698 }
 699
 700 void usb_ep_set_pipeline(USBDevice *dev, int pid, int ep, bool enabled)
 701 {
 702     struct USBEndpoint *uep = usb_ep_get(dev, pid, ep);
 703     uep->pipeline = enabled;
 704 }