1 /* $FreeBSD$ */ 2 /*- 3 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 4 * 5 * Copyright (c) 2009 Sylvestre Gallon. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29 #ifdef LIBUSB_GLOBAL_INCLUDE_FILE 30 #include LIBUSB_GLOBAL_INCLUDE_FILE 31 #else 32 #include <errno.h> 33 #include <poll.h> 34 #include <pthread.h> 35 #include <stdio.h> 36 #include <stdlib.h> 37 #include <string.h> 38 #include <time.h> 39 #include <unistd.h> 40 #include <sys/queue.h> 41 #include <sys/endian.h> 42 #endif 43 44 #define libusb_device_handle libusb20_device 45 46 #include "libusb20.h" 47 #include "libusb20_desc.h" 48 #include "libusb20_int.h" 49 #include "libusb.h" 50 #include "libusb10.h" 51 52 UNEXPORTED void 53 libusb10_add_pollfd(libusb_context *ctx, struct libusb_super_pollfd *pollfd, 54 struct libusb20_device *pdev, int fd, short events) 55 { 56 if (ctx == NULL) 57 return; /* invalid */ 58 59 if (pollfd->entry.tqe_prev != NULL) 60 return; /* already queued */ 61 62 if (fd < 0) 63 return; /* invalid */ 64 65 pollfd->pdev = pdev; 66 pollfd->pollfd.fd = fd; 67 pollfd->pollfd.events = events; 68 69 CTX_LOCK(ctx); 70 TAILQ_INSERT_TAIL(&ctx->pollfds, pollfd, entry); 71 CTX_UNLOCK(ctx); 72 73 if (ctx->fd_added_cb) 74 ctx->fd_added_cb(fd, events, ctx->fd_cb_user_data); 75 } 76 77 UNEXPORTED void 78 libusb10_remove_pollfd(libusb_context *ctx, struct libusb_super_pollfd *pollfd) 79 { 80 if (ctx == NULL) 81 return; /* invalid */ 82 83 if (pollfd->entry.tqe_prev == NULL) 84 return; /* already dequeued */ 85 86 CTX_LOCK(ctx); 87 TAILQ_REMOVE(&ctx->pollfds, pollfd, entry); 88 pollfd->entry.tqe_prev = NULL; 89 CTX_UNLOCK(ctx); 90 91 if (ctx->fd_removed_cb) 92 ctx->fd_removed_cb(pollfd->pollfd.fd, ctx->fd_cb_user_data); 93 } 94 95 /* This function must be called locked */ 96 97 static int 98 libusb10_handle_events_sub(struct libusb_context *ctx, struct timeval *tv) 99 { 100 struct libusb_device *dev; 101 struct libusb20_device **ppdev; 102 struct libusb_super_pollfd *pfd; 103 struct pollfd *fds; 104 struct libusb_super_transfer *sxfer; 105 struct libusb_transfer *uxfer; 106 nfds_t nfds; 107 int timeout; 108 int i; 109 int err; 110 111 DPRINTF(ctx, LIBUSB_DEBUG_FUNCTION, "libusb10_handle_events_sub enter"); 112 113 nfds = 0; 114 i = 0; 115 TAILQ_FOREACH(pfd, &ctx->pollfds, entry) 116 nfds++; 117 118 fds = alloca(sizeof(*fds) * nfds); 119 if (fds == NULL) 120 return (LIBUSB_ERROR_NO_MEM); 121 122 ppdev = alloca(sizeof(*ppdev) * nfds); 123 if (ppdev == NULL) 124 return (LIBUSB_ERROR_NO_MEM); 125 126 TAILQ_FOREACH(pfd, &ctx->pollfds, entry) { 127 fds[i].fd = pfd->pollfd.fd; 128 fds[i].events = pfd->pollfd.events; 129 fds[i].revents = 0; 130 ppdev[i] = pfd->pdev; 131 if (pfd->pdev != NULL) 132 libusb_get_device(pfd->pdev)->refcnt++; 133 i++; 134 } 135 136 if (tv == NULL) 137 timeout = -1; 138 else 139 timeout = (tv->tv_sec * 1000) + ((tv->tv_usec + 999) / 1000); 140 141 CTX_UNLOCK(ctx); 142 err = poll(fds, nfds, timeout); 143 CTX_LOCK(ctx); 144 145 if ((err == -1) && (errno == EINTR)) 146 err = LIBUSB_ERROR_INTERRUPTED; 147 else if (err < 0) 148 err = LIBUSB_ERROR_IO; 149 150 if (err < 1) { 151 for (i = 0; i != (int)nfds; i++) { 152 if (ppdev[i] != NULL) { 153 CTX_UNLOCK(ctx); 154 libusb_unref_device(libusb_get_device(ppdev[i])); 155 CTX_LOCK(ctx); 156 } 157 } 158 goto do_done; 159 } 160 for (i = 0; i != (int)nfds; i++) { 161 if (ppdev[i] != NULL) { 162 dev = libusb_get_device(ppdev[i]); 163 164 if (fds[i].revents == 0) 165 err = 0; /* nothing to do */ 166 else 167 err = libusb20_dev_process(ppdev[i]); 168 169 if (err) { 170 /* cancel all transfers - device is gone */ 171 libusb10_cancel_all_transfer(dev); 172 173 /* remove USB device from polling loop */ 174 libusb10_remove_pollfd(dev->ctx, &dev->dev_poll); 175 } 176 CTX_UNLOCK(ctx); 177 libusb_unref_device(dev); 178 CTX_LOCK(ctx); 179 180 } else { 181 uint8_t dummy; 182 183 while (1) { 184 if (read(fds[i].fd, &dummy, 1) != 1) 185 break; 186 } 187 } 188 } 189 190 err = 0; 191 192 do_done: 193 194 /* Do all done callbacks */ 195 196 while ((sxfer = TAILQ_FIRST(&ctx->tr_done))) { 197 uint8_t flags; 198 199 TAILQ_REMOVE(&ctx->tr_done, sxfer, entry); 200 sxfer->entry.tqe_prev = NULL; 201 202 ctx->tr_done_ref++; 203 204 CTX_UNLOCK(ctx); 205 206 uxfer = (struct libusb_transfer *)( 207 ((uint8_t *)sxfer) + sizeof(*sxfer)); 208 209 /* Allow the callback to free the transfer itself. */ 210 flags = uxfer->flags; 211 212 if (uxfer->callback != NULL) 213 (uxfer->callback) (uxfer); 214 215 /* Check if the USB transfer should be automatically freed. */ 216 if (flags & LIBUSB_TRANSFER_FREE_TRANSFER) 217 libusb_free_transfer(uxfer); 218 219 CTX_LOCK(ctx); 220 221 ctx->tr_done_ref--; 222 ctx->tr_done_gen++; 223 } 224 225 /* Wakeup other waiters */ 226 pthread_cond_broadcast(&ctx->ctx_cond); 227 228 return (err); 229 } 230 231 /* Polling and timing */ 232 233 int 234 libusb_try_lock_events(libusb_context *ctx) 235 { 236 int err; 237 238 ctx = GET_CONTEXT(ctx); 239 if (ctx == NULL) 240 return (1); 241 242 err = CTX_TRYLOCK(ctx); 243 if (err) 244 return (1); 245 246 err = (ctx->ctx_handler != NO_THREAD); 247 if (err) 248 CTX_UNLOCK(ctx); 249 else 250 ctx->ctx_handler = pthread_self(); 251 252 return (err); 253 } 254 255 void 256 libusb_lock_events(libusb_context *ctx) 257 { 258 ctx = GET_CONTEXT(ctx); 259 CTX_LOCK(ctx); 260 if (ctx->ctx_handler == NO_THREAD) 261 ctx->ctx_handler = pthread_self(); 262 } 263 264 void 265 libusb_unlock_events(libusb_context *ctx) 266 { 267 ctx = GET_CONTEXT(ctx); 268 if (ctx->ctx_handler == pthread_self()) { 269 ctx->ctx_handler = NO_THREAD; 270 pthread_cond_broadcast(&ctx->ctx_cond); 271 } 272 CTX_UNLOCK(ctx); 273 } 274 275 int 276 libusb_event_handling_ok(libusb_context *ctx) 277 { 278 ctx = GET_CONTEXT(ctx); 279 return (ctx->ctx_handler == pthread_self()); 280 } 281 282 int 283 libusb_event_handler_active(libusb_context *ctx) 284 { 285 ctx = GET_CONTEXT(ctx); 286 return (ctx->ctx_handler != NO_THREAD); 287 } 288 289 void 290 libusb_lock_event_waiters(libusb_context *ctx) 291 { 292 ctx = GET_CONTEXT(ctx); 293 CTX_LOCK(ctx); 294 } 295 296 void 297 libusb_unlock_event_waiters(libusb_context *ctx) 298 { 299 ctx = GET_CONTEXT(ctx); 300 CTX_UNLOCK(ctx); 301 } 302 303 int 304 libusb_wait_for_event(libusb_context *ctx, struct timeval *tv) 305 { 306 struct timespec ts; 307 int err; 308 309 ctx = GET_CONTEXT(ctx); 310 DPRINTF(ctx, LIBUSB_DEBUG_FUNCTION, "libusb_wait_for_event enter"); 311 312 if (tv == NULL) { 313 pthread_cond_wait(&ctx->ctx_cond, 314 &ctx->ctx_lock); 315 return (0); 316 } 317 err = clock_gettime(CLOCK_MONOTONIC, &ts); 318 if (err < 0) 319 return (LIBUSB_ERROR_OTHER); 320 321 /* 322 * The "tv" arguments points to a relative time structure and 323 * not an absolute time structure. 324 */ 325 ts.tv_sec += tv->tv_sec; 326 ts.tv_nsec += tv->tv_usec * 1000; 327 if (ts.tv_nsec >= 1000000000) { 328 ts.tv_nsec -= 1000000000; 329 ts.tv_sec++; 330 } 331 err = pthread_cond_timedwait(&ctx->ctx_cond, 332 &ctx->ctx_lock, &ts); 333 334 if (err == ETIMEDOUT) 335 return (1); 336 337 return (0); 338 } 339 340 int 341 libusb_handle_events_timeout_completed(libusb_context *ctx, 342 struct timeval *tv, int *completed) 343 { 344 int err = 0; 345 346 ctx = GET_CONTEXT(ctx); 347 348 DPRINTF(ctx, LIBUSB_DEBUG_FUNCTION, "libusb_handle_events_timeout_completed enter"); 349 350 libusb_lock_events(ctx); 351 352 while (1) { 353 if (completed != NULL) { 354 if (*completed != 0 || err != 0) 355 break; 356 } 357 err = libusb_handle_events_locked(ctx, tv); 358 if (completed == NULL) 359 break; 360 } 361 362 libusb_unlock_events(ctx); 363 364 DPRINTF(ctx, LIBUSB_DEBUG_FUNCTION, "libusb_handle_events_timeout_completed exit"); 365 366 return (err); 367 } 368 369 int 370 libusb_handle_events_completed(libusb_context *ctx, int *completed) 371 { 372 return (libusb_handle_events_timeout_completed(ctx, NULL, completed)); 373 } 374 375 int 376 libusb_handle_events_timeout(libusb_context *ctx, struct timeval *tv) 377 { 378 return (libusb_handle_events_timeout_completed(ctx, tv, NULL)); 379 } 380 381 int 382 libusb_handle_events(libusb_context *ctx) 383 { 384 return (libusb_handle_events_timeout_completed(ctx, NULL, NULL)); 385 } 386 387 int 388 libusb_handle_events_locked(libusb_context *ctx, struct timeval *tv) 389 { 390 int err; 391 392 ctx = GET_CONTEXT(ctx); 393 394 if (libusb_event_handling_ok(ctx)) { 395 err = libusb10_handle_events_sub(ctx, tv); 396 } else { 397 err = libusb_wait_for_event(ctx, tv); 398 if (err != 0) 399 err = LIBUSB_ERROR_TIMEOUT; 400 } 401 return (err); 402 } 403 404 int 405 libusb_get_next_timeout(libusb_context *ctx, struct timeval *tv) 406 { 407 /* all timeouts are currently being done by the kernel */ 408 timerclear(tv); 409 return (0); 410 } 411 412 void 413 libusb_set_pollfd_notifiers(libusb_context *ctx, 414 libusb_pollfd_added_cb added_cb, libusb_pollfd_removed_cb removed_cb, 415 void *user_data) 416 { 417 ctx = GET_CONTEXT(ctx); 418 419 ctx->fd_added_cb = added_cb; 420 ctx->fd_removed_cb = removed_cb; 421 ctx->fd_cb_user_data = user_data; 422 } 423 424 const struct libusb_pollfd ** 425 libusb_get_pollfds(libusb_context *ctx) 426 { 427 struct libusb_super_pollfd *pollfd; 428 libusb_pollfd **ret; 429 int i; 430 431 ctx = GET_CONTEXT(ctx); 432 433 CTX_LOCK(ctx); 434 435 i = 0; 436 TAILQ_FOREACH(pollfd, &ctx->pollfds, entry) 437 i++; 438 439 ret = calloc(i + 1, sizeof(struct libusb_pollfd *)); 440 if (ret == NULL) 441 goto done; 442 443 i = 0; 444 TAILQ_FOREACH(pollfd, &ctx->pollfds, entry) 445 ret[i++] = &pollfd->pollfd; 446 ret[i] = NULL; 447 448 done: 449 CTX_UNLOCK(ctx); 450 return ((const struct libusb_pollfd **)ret); 451 } 452 453 454 /* Synchronous device I/O */ 455 456 int 457 libusb_control_transfer(libusb_device_handle *devh, 458 uint8_t bmRequestType, uint8_t bRequest, uint16_t wValue, uint16_t wIndex, 459 uint8_t *data, uint16_t wLength, unsigned int timeout) 460 { 461 struct LIBUSB20_CONTROL_SETUP_DECODED req; 462 int err; 463 uint16_t actlen; 464 465 if (devh == NULL) 466 return (LIBUSB_ERROR_INVALID_PARAM); 467 468 if ((wLength != 0) && (data == NULL)) 469 return (LIBUSB_ERROR_INVALID_PARAM); 470 471 LIBUSB20_INIT(LIBUSB20_CONTROL_SETUP, &req); 472 473 req.bmRequestType = bmRequestType; 474 req.bRequest = bRequest; 475 req.wValue = wValue; 476 req.wIndex = wIndex; 477 req.wLength = wLength; 478 479 err = libusb20_dev_request_sync(devh, &req, data, 480 &actlen, timeout, 0); 481 482 if (err == LIBUSB20_ERROR_PIPE) 483 return (LIBUSB_ERROR_PIPE); 484 else if (err == LIBUSB20_ERROR_TIMEOUT) 485 return (LIBUSB_ERROR_TIMEOUT); 486 else if (err) 487 return (LIBUSB_ERROR_NO_DEVICE); 488 489 return (actlen); 490 } 491 492 static void 493 libusb10_do_transfer_cb(struct libusb_transfer *transfer) 494 { 495 libusb_context *ctx; 496 int *pdone; 497 498 ctx = GET_CONTEXT(NULL); 499 500 DPRINTF(ctx, LIBUSB_DEBUG_TRANSFER, "sync I/O done"); 501 502 pdone = transfer->user_data; 503 *pdone = 1; 504 } 505 506 /* 507 * TODO: Replace the following function. Allocating and freeing on a 508 * per-transfer basis is slow. --HPS 509 */ 510 static int 511 libusb10_do_transfer(libusb_device_handle *devh, 512 uint8_t endpoint, uint8_t *data, int length, 513 int *transferred, unsigned int timeout, int type) 514 { 515 libusb_context *ctx; 516 struct libusb_transfer *xfer; 517 int done; 518 int ret; 519 520 if (devh == NULL) 521 return (LIBUSB_ERROR_INVALID_PARAM); 522 523 if ((length != 0) && (data == NULL)) 524 return (LIBUSB_ERROR_INVALID_PARAM); 525 526 xfer = libusb_alloc_transfer(0); 527 if (xfer == NULL) 528 return (LIBUSB_ERROR_NO_MEM); 529 530 ctx = libusb_get_device(devh)->ctx; 531 532 xfer->dev_handle = devh; 533 xfer->endpoint = endpoint; 534 xfer->type = type; 535 xfer->timeout = timeout; 536 xfer->buffer = data; 537 xfer->length = length; 538 xfer->user_data = (void *)&done; 539 xfer->callback = libusb10_do_transfer_cb; 540 done = 0; 541 542 if ((ret = libusb_submit_transfer(xfer)) < 0) { 543 libusb_free_transfer(xfer); 544 return (ret); 545 } 546 while (done == 0) { 547 if ((ret = libusb_handle_events(ctx)) < 0) { 548 libusb_cancel_transfer(xfer); 549 usleep(1000); /* nice it */ 550 } 551 } 552 553 *transferred = xfer->actual_length; 554 555 switch (xfer->status) { 556 case LIBUSB_TRANSFER_COMPLETED: 557 ret = 0; 558 break; 559 case LIBUSB_TRANSFER_TIMED_OUT: 560 ret = LIBUSB_ERROR_TIMEOUT; 561 break; 562 case LIBUSB_TRANSFER_OVERFLOW: 563 ret = LIBUSB_ERROR_OVERFLOW; 564 break; 565 case LIBUSB_TRANSFER_STALL: 566 ret = LIBUSB_ERROR_PIPE; 567 break; 568 case LIBUSB_TRANSFER_NO_DEVICE: 569 ret = LIBUSB_ERROR_NO_DEVICE; 570 break; 571 default: 572 ret = LIBUSB_ERROR_OTHER; 573 break; 574 } 575 576 libusb_free_transfer(xfer); 577 return (ret); 578 } 579 580 int 581 libusb_bulk_transfer(libusb_device_handle *devh, 582 uint8_t endpoint, uint8_t *data, int length, 583 int *transferred, unsigned int timeout) 584 { 585 libusb_context *ctx; 586 int ret; 587 588 ctx = GET_CONTEXT(NULL); 589 DPRINTF(ctx, LIBUSB_DEBUG_FUNCTION, "libusb_bulk_transfer enter"); 590 591 ret = libusb10_do_transfer(devh, endpoint, data, length, transferred, 592 timeout, LIBUSB_TRANSFER_TYPE_BULK); 593 594 DPRINTF(ctx, LIBUSB_DEBUG_FUNCTION, "libusb_bulk_transfer leave"); 595 return (ret); 596 } 597 598 int 599 libusb_interrupt_transfer(libusb_device_handle *devh, 600 uint8_t endpoint, uint8_t *data, int length, 601 int *transferred, unsigned int timeout) 602 { 603 libusb_context *ctx; 604 int ret; 605 606 ctx = GET_CONTEXT(NULL); 607 DPRINTF(ctx, LIBUSB_DEBUG_FUNCTION, "libusb_interrupt_transfer enter"); 608 609 ret = libusb10_do_transfer(devh, endpoint, data, length, transferred, 610 timeout, LIBUSB_TRANSFER_TYPE_INTERRUPT); 611 612 DPRINTF(ctx, LIBUSB_DEBUG_FUNCTION, "libusb_interrupt_transfer leave"); 613 return (ret); 614 } 615 616 uint8_t * 617 libusb_get_iso_packet_buffer(struct libusb_transfer *transfer, uint32_t off) 618 { 619 uint8_t *ptr; 620 uint32_t n; 621 622 if (transfer->num_iso_packets < 0) 623 return (NULL); 624 625 if (off >= (uint32_t)transfer->num_iso_packets) 626 return (NULL); 627 628 ptr = transfer->buffer; 629 if (ptr == NULL) 630 return (NULL); 631 632 for (n = 0; n != off; n++) { 633 ptr += transfer->iso_packet_desc[n].length; 634 } 635 return (ptr); 636 } 637 638 uint8_t * 639 libusb_get_iso_packet_buffer_simple(struct libusb_transfer *transfer, uint32_t off) 640 { 641 uint8_t *ptr; 642 643 if (transfer->num_iso_packets < 0) 644 return (NULL); 645 646 if (off >= (uint32_t)transfer->num_iso_packets) 647 return (NULL); 648 649 ptr = transfer->buffer; 650 if (ptr == NULL) 651 return (NULL); 652 653 ptr += transfer->iso_packet_desc[0].length * off; 654 655 return (ptr); 656 } 657 658 void 659 libusb_set_iso_packet_lengths(struct libusb_transfer *transfer, uint32_t length) 660 { 661 int n; 662 663 if (transfer->num_iso_packets < 0) 664 return; 665 666 for (n = 0; n != transfer->num_iso_packets; n++) 667 transfer->iso_packet_desc[n].length = length; 668 } 669 670 uint8_t * 671 libusb_control_transfer_get_data(struct libusb_transfer *transfer) 672 { 673 if (transfer->buffer == NULL) 674 return (NULL); 675 676 return (transfer->buffer + LIBUSB_CONTROL_SETUP_SIZE); 677 } 678 679 struct libusb_control_setup * 680 libusb_control_transfer_get_setup(struct libusb_transfer *transfer) 681 { 682 return ((struct libusb_control_setup *)transfer->buffer); 683 } 684 685 void 686 libusb_fill_control_setup(uint8_t *buf, uint8_t bmRequestType, 687 uint8_t bRequest, uint16_t wValue, 688 uint16_t wIndex, uint16_t wLength) 689 { 690 struct libusb_control_setup *req = (struct libusb_control_setup *)buf; 691 692 /* The alignment is OK for all fields below. */ 693 req->bmRequestType = bmRequestType; 694 req->bRequest = bRequest; 695 req->wValue = htole16(wValue); 696 req->wIndex = htole16(wIndex); 697 req->wLength = htole16(wLength); 698 } 699 700 void 701 libusb_fill_control_transfer(struct libusb_transfer *transfer, 702 libusb_device_handle *devh, uint8_t *buf, 703 libusb_transfer_cb_fn callback, void *user_data, 704 uint32_t timeout) 705 { 706 struct libusb_control_setup *setup = (struct libusb_control_setup *)buf; 707 708 transfer->dev_handle = devh; 709 transfer->endpoint = 0; 710 transfer->type = LIBUSB_TRANSFER_TYPE_CONTROL; 711 transfer->timeout = timeout; 712 transfer->buffer = buf; 713 if (setup != NULL) 714 transfer->length = LIBUSB_CONTROL_SETUP_SIZE 715 + le16toh(setup->wLength); 716 else 717 transfer->length = 0; 718 transfer->user_data = user_data; 719 transfer->callback = callback; 720 721 } 722 723 void 724 libusb_fill_bulk_transfer(struct libusb_transfer *transfer, 725 libusb_device_handle *devh, uint8_t endpoint, uint8_t *buf, 726 int length, libusb_transfer_cb_fn callback, void *user_data, 727 uint32_t timeout) 728 { 729 transfer->dev_handle = devh; 730 transfer->endpoint = endpoint; 731 transfer->type = LIBUSB_TRANSFER_TYPE_BULK; 732 transfer->timeout = timeout; 733 transfer->buffer = buf; 734 transfer->length = length; 735 transfer->user_data = user_data; 736 transfer->callback = callback; 737 } 738 739 void 740 libusb_fill_interrupt_transfer(struct libusb_transfer *transfer, 741 libusb_device_handle *devh, uint8_t endpoint, uint8_t *buf, 742 int length, libusb_transfer_cb_fn callback, void *user_data, 743 uint32_t timeout) 744 { 745 transfer->dev_handle = devh; 746 transfer->endpoint = endpoint; 747 transfer->type = LIBUSB_TRANSFER_TYPE_INTERRUPT; 748 transfer->timeout = timeout; 749 transfer->buffer = buf; 750 transfer->length = length; 751 transfer->user_data = user_data; 752 transfer->callback = callback; 753 } 754 755 void 756 libusb_fill_iso_transfer(struct libusb_transfer *transfer, 757 libusb_device_handle *devh, uint8_t endpoint, uint8_t *buf, 758 int length, int npacket, libusb_transfer_cb_fn callback, 759 void *user_data, uint32_t timeout) 760 { 761 transfer->dev_handle = devh; 762 transfer->endpoint = endpoint; 763 transfer->type = LIBUSB_TRANSFER_TYPE_ISOCHRONOUS; 764 transfer->timeout = timeout; 765 transfer->buffer = buf; 766 transfer->length = length; 767 transfer->num_iso_packets = npacket; 768 transfer->user_data = user_data; 769 transfer->callback = callback; 770 } 771 772 int 773 libusb_alloc_streams(libusb_device_handle *dev, uint32_t num_streams, 774 unsigned char *endpoints, int num_endpoints) 775 { 776 if (num_streams > 1) 777 return (LIBUSB_ERROR_INVALID_PARAM); 778 return (0); 779 } 780 781 int 782 libusb_free_streams(libusb_device_handle *dev, unsigned char *endpoints, int num_endpoints) 783 { 784 785 return (0); 786 } 787 788 void 789 libusb_transfer_set_stream_id(struct libusb_transfer *transfer, uint32_t stream_id) 790 { 791 struct libusb_super_transfer *sxfer; 792 793 if (transfer == NULL) 794 return; 795 796 sxfer = (struct libusb_super_transfer *)( 797 ((uint8_t *)transfer) - sizeof(*sxfer)); 798 799 /* set stream ID */ 800 sxfer->stream_id = stream_id; 801 } 802 803 uint32_t 804 libusb_transfer_get_stream_id(struct libusb_transfer *transfer) 805 { 806 struct libusb_super_transfer *sxfer; 807 808 if (transfer == NULL) 809 return (0); 810 811 sxfer = (struct libusb_super_transfer *)( 812 ((uint8_t *)transfer) - sizeof(*sxfer)); 813 814 /* get stream ID */ 815 return (sxfer->stream_id); 816 } 817