1 /* $FreeBSD: head/lib/libusb/libusb10_io.c 260315 2014-01-05 10:41:43Z hselasky $ */ 2 /*- 3 * Copyright (c) 2009 Sylvestre Gallon. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 */ 26 27 #ifdef LIBUSB_GLOBAL_INCLUDE_FILE 28 #include LIBUSB_GLOBAL_INCLUDE_FILE 29 #else 30 #include <errno.h> 31 #include <poll.h> 32 #include <pthread.h> 33 #include <stdio.h> 34 #include <stdlib.h> 35 #include <string.h> 36 #include <time.h> 37 #include <unistd.h> 38 #include <sys/queue.h> 39 #include <sys/endian.h> 40 #endif 41 42 #define libusb_device_handle libusb20_device 43 44 #include "libusb20.h" 45 #include "libusb20_desc.h" 46 #include "libusb20_int.h" 47 #include "libusb.h" 48 #include "libusb10.h" 49 50 UNEXPORTED void 51 libusb10_add_pollfd(libusb_context *ctx, struct libusb_super_pollfd *pollfd, 52 struct libusb20_device *pdev, int fd, short events) 53 { 54 if (ctx == NULL) 55 return; /* invalid */ 56 57 if (pollfd->entry.tqe_prev != NULL) 58 return; /* already queued */ 59 60 if (fd < 0) 61 return; /* invalid */ 62 63 pollfd->pdev = pdev; 64 pollfd->pollfd.fd = fd; 65 pollfd->pollfd.events = events; 66 67 CTX_LOCK(ctx); 68 TAILQ_INSERT_TAIL(&ctx->pollfds, pollfd, entry); 69 CTX_UNLOCK(ctx); 70 71 if (ctx->fd_added_cb) 72 ctx->fd_added_cb(fd, events, ctx->fd_cb_user_data); 73 } 74 75 UNEXPORTED void 76 libusb10_remove_pollfd(libusb_context *ctx, struct libusb_super_pollfd *pollfd) 77 { 78 if (ctx == NULL) 79 return; /* invalid */ 80 81 if (pollfd->entry.tqe_prev == NULL) 82 return; /* already dequeued */ 83 84 CTX_LOCK(ctx); 85 TAILQ_REMOVE(&ctx->pollfds, pollfd, entry); 86 pollfd->entry.tqe_prev = NULL; 87 CTX_UNLOCK(ctx); 88 89 if (ctx->fd_removed_cb) 90 ctx->fd_removed_cb(pollfd->pollfd.fd, ctx->fd_cb_user_data); 91 } 92 93 /* This function must be called locked */ 94 95 static int 96 libusb10_handle_events_sub(struct libusb_context *ctx, struct timeval *tv) 97 { 98 struct libusb_device *dev; 99 struct libusb20_device **ppdev; 100 struct libusb_super_pollfd *pfd; 101 struct pollfd *fds; 102 struct libusb_super_transfer *sxfer; 103 struct libusb_transfer *uxfer; 104 nfds_t nfds; 105 int timeout; 106 int i; 107 int err; 108 109 DPRINTF(ctx, LIBUSB_DEBUG_FUNCTION, "libusb10_handle_events_sub enter"); 110 111 nfds = 0; 112 i = 0; 113 TAILQ_FOREACH(pfd, &ctx->pollfds, entry) 114 nfds++; 115 116 fds = alloca(sizeof(*fds) * nfds); 117 if (fds == NULL) 118 return (LIBUSB_ERROR_NO_MEM); 119 120 ppdev = alloca(sizeof(*ppdev) * nfds); 121 if (ppdev == NULL) 122 return (LIBUSB_ERROR_NO_MEM); 123 124 TAILQ_FOREACH(pfd, &ctx->pollfds, entry) { 125 fds[i].fd = pfd->pollfd.fd; 126 fds[i].events = pfd->pollfd.events; 127 fds[i].revents = 0; 128 ppdev[i] = pfd->pdev; 129 if (pfd->pdev != NULL) 130 libusb_get_device(pfd->pdev)->refcnt++; 131 i++; 132 } 133 134 if (tv == NULL) 135 timeout = -1; 136 else 137 timeout = (tv->tv_sec * 1000) + ((tv->tv_usec + 999) / 1000); 138 139 CTX_UNLOCK(ctx); 140 err = poll(fds, nfds, timeout); 141 CTX_LOCK(ctx); 142 143 if ((err == -1) && (errno == EINTR)) 144 err = LIBUSB_ERROR_INTERRUPTED; 145 else if (err < 0) 146 err = LIBUSB_ERROR_IO; 147 148 if (err < 1) { 149 for (i = 0; i != (int)nfds; i++) { 150 if (ppdev[i] != NULL) { 151 CTX_UNLOCK(ctx); 152 libusb_unref_device(libusb_get_device(ppdev[i])); 153 CTX_LOCK(ctx); 154 } 155 } 156 goto do_done; 157 } 158 for (i = 0; i != (int)nfds; i++) { 159 if (ppdev[i] != NULL) { 160 dev = libusb_get_device(ppdev[i]); 161 162 if (fds[i].revents == 0) 163 err = 0; /* nothing to do */ 164 else 165 err = libusb20_dev_process(ppdev[i]); 166 167 if (err) { 168 /* cancel all transfers - device is gone */ 169 libusb10_cancel_all_transfer(dev); 170 171 /* remove USB device from polling loop */ 172 libusb10_remove_pollfd(dev->ctx, &dev->dev_poll); 173 } 174 CTX_UNLOCK(ctx); 175 libusb_unref_device(dev); 176 CTX_LOCK(ctx); 177 178 } else { 179 uint8_t dummy; 180 181 while (1) { 182 if (read(fds[i].fd, &dummy, 1) != 1) 183 break; 184 } 185 } 186 } 187 188 err = 0; 189 190 do_done: 191 192 /* Do all done callbacks */ 193 194 while ((sxfer = TAILQ_FIRST(&ctx->tr_done))) { 195 uint8_t flags; 196 197 TAILQ_REMOVE(&ctx->tr_done, sxfer, entry); 198 sxfer->entry.tqe_prev = NULL; 199 200 ctx->tr_done_ref++; 201 202 CTX_UNLOCK(ctx); 203 204 uxfer = (struct libusb_transfer *)( 205 ((uint8_t *)sxfer) + sizeof(*sxfer)); 206 207 /* Allow the callback to free the transfer itself. */ 208 flags = uxfer->flags; 209 210 if (uxfer->callback != NULL) 211 (uxfer->callback) (uxfer); 212 213 /* Check if the USB transfer should be automatically freed. */ 214 if (flags & LIBUSB_TRANSFER_FREE_TRANSFER) 215 libusb_free_transfer(uxfer); 216 217 CTX_LOCK(ctx); 218 219 ctx->tr_done_ref--; 220 ctx->tr_done_gen++; 221 } 222 223 /* Wakeup other waiters */ 224 pthread_cond_broadcast(&ctx->ctx_cond); 225 226 return (err); 227 } 228 229 /* Polling and timing */ 230 231 int 232 libusb_try_lock_events(libusb_context *ctx) 233 { 234 int err; 235 236 ctx = GET_CONTEXT(ctx); 237 if (ctx == NULL) 238 return (1); 239 240 err = CTX_TRYLOCK(ctx); 241 if (err) 242 return (1); 243 244 err = (ctx->ctx_handler != NO_THREAD); 245 if (err) 246 CTX_UNLOCK(ctx); 247 else 248 ctx->ctx_handler = pthread_self(); 249 250 return (err); 251 } 252 253 void 254 libusb_lock_events(libusb_context *ctx) 255 { 256 ctx = GET_CONTEXT(ctx); 257 CTX_LOCK(ctx); 258 if (ctx->ctx_handler == NO_THREAD) 259 ctx->ctx_handler = pthread_self(); 260 } 261 262 void 263 libusb_unlock_events(libusb_context *ctx) 264 { 265 ctx = GET_CONTEXT(ctx); 266 if (ctx->ctx_handler == pthread_self()) { 267 ctx->ctx_handler = NO_THREAD; 268 pthread_cond_broadcast(&ctx->ctx_cond); 269 } 270 CTX_UNLOCK(ctx); 271 } 272 273 int 274 libusb_event_handling_ok(libusb_context *ctx) 275 { 276 ctx = GET_CONTEXT(ctx); 277 return (ctx->ctx_handler == pthread_self()); 278 } 279 280 int 281 libusb_event_handler_active(libusb_context *ctx) 282 { 283 ctx = GET_CONTEXT(ctx); 284 return (ctx->ctx_handler != NO_THREAD); 285 } 286 287 void 288 libusb_lock_event_waiters(libusb_context *ctx) 289 { 290 ctx = GET_CONTEXT(ctx); 291 CTX_LOCK(ctx); 292 } 293 294 void 295 libusb_unlock_event_waiters(libusb_context *ctx) 296 { 297 ctx = GET_CONTEXT(ctx); 298 CTX_UNLOCK(ctx); 299 } 300 301 int 302 libusb_wait_for_event(libusb_context *ctx, struct timeval *tv) 303 { 304 struct timespec ts; 305 int err; 306 307 ctx = GET_CONTEXT(ctx); 308 DPRINTF(ctx, LIBUSB_DEBUG_FUNCTION, "libusb_wait_for_event enter"); 309 310 if (tv == NULL) { 311 pthread_cond_wait(&ctx->ctx_cond, 312 &ctx->ctx_lock); 313 return (0); 314 } 315 err = clock_gettime(CLOCK_MONOTONIC, &ts); 316 if (err < 0) 317 return (LIBUSB_ERROR_OTHER); 318 319 /* 320 * The "tv" arguments points to a relative time structure and 321 * not an absolute time structure. 322 */ 323 ts.tv_sec += tv->tv_sec; 324 ts.tv_nsec += tv->tv_usec * 1000; 325 if (ts.tv_nsec >= 1000000000) { 326 ts.tv_nsec -= 1000000000; 327 ts.tv_sec++; 328 } 329 err = pthread_cond_timedwait(&ctx->ctx_cond, 330 &ctx->ctx_lock, &ts); 331 332 if (err == ETIMEDOUT) 333 return (1); 334 335 return (0); 336 } 337 338 int 339 libusb_handle_events_timeout_completed(libusb_context *ctx, 340 struct timeval *tv, int *completed) 341 { 342 int err = 0; 343 344 ctx = GET_CONTEXT(ctx); 345 346 DPRINTF(ctx, LIBUSB_DEBUG_FUNCTION, "libusb_handle_events_timeout_completed enter"); 347 348 libusb_lock_events(ctx); 349 350 while (1) { 351 if (completed != NULL) { 352 if (*completed != 0 || err != 0) 353 break; 354 } 355 err = libusb_handle_events_locked(ctx, tv); 356 if (completed == NULL) 357 break; 358 } 359 360 libusb_unlock_events(ctx); 361 362 DPRINTF(ctx, LIBUSB_DEBUG_FUNCTION, "libusb_handle_events_timeout_completed exit"); 363 364 return (err); 365 } 366 367 int 368 libusb_handle_events_completed(libusb_context *ctx, int *completed) 369 { 370 return (libusb_handle_events_timeout_completed(ctx, NULL, completed)); 371 } 372 373 int 374 libusb_handle_events_timeout(libusb_context *ctx, struct timeval *tv) 375 { 376 return (libusb_handle_events_timeout_completed(ctx, tv, NULL)); 377 } 378 379 int 380 libusb_handle_events(libusb_context *ctx) 381 { 382 return (libusb_handle_events_timeout_completed(ctx, NULL, NULL)); 383 } 384 385 int 386 libusb_handle_events_locked(libusb_context *ctx, struct timeval *tv) 387 { 388 int err; 389 390 ctx = GET_CONTEXT(ctx); 391 392 if (libusb_event_handling_ok(ctx)) { 393 err = libusb10_handle_events_sub(ctx, tv); 394 } else { 395 err = libusb_wait_for_event(ctx, tv); 396 if (err != 0) 397 err = LIBUSB_ERROR_TIMEOUT; 398 } 399 return (err); 400 } 401 402 int 403 libusb_get_next_timeout(libusb_context *ctx, struct timeval *tv) 404 { 405 /* all timeouts are currently being done by the kernel */ 406 timerclear(tv); 407 return (0); 408 } 409 410 void 411 libusb_set_pollfd_notifiers(libusb_context *ctx, 412 libusb_pollfd_added_cb added_cb, libusb_pollfd_removed_cb removed_cb, 413 void *user_data) 414 { 415 ctx = GET_CONTEXT(ctx); 416 417 ctx->fd_added_cb = added_cb; 418 ctx->fd_removed_cb = removed_cb; 419 ctx->fd_cb_user_data = user_data; 420 } 421 422 const struct libusb_pollfd ** 423 libusb_get_pollfds(libusb_context *ctx) 424 { 425 struct libusb_super_pollfd *pollfd; 426 libusb_pollfd **ret; 427 int i; 428 429 ctx = GET_CONTEXT(ctx); 430 431 CTX_LOCK(ctx); 432 433 i = 0; 434 TAILQ_FOREACH(pollfd, &ctx->pollfds, entry) 435 i++; 436 437 ret = calloc(i + 1, sizeof(struct libusb_pollfd *)); 438 if (ret == NULL) 439 goto done; 440 441 i = 0; 442 TAILQ_FOREACH(pollfd, &ctx->pollfds, entry) 443 ret[i++] = &pollfd->pollfd; 444 ret[i] = NULL; 445 446 done: 447 CTX_UNLOCK(ctx); 448 return ((const struct libusb_pollfd **)ret); 449 } 450 451 452 /* Synchronous device I/O */ 453 454 int 455 libusb_control_transfer(libusb_device_handle *devh, 456 uint8_t bmRequestType, uint8_t bRequest, uint16_t wValue, uint16_t wIndex, 457 uint8_t *data, uint16_t wLength, unsigned int timeout) 458 { 459 struct LIBUSB20_CONTROL_SETUP_DECODED req; 460 int err; 461 uint16_t actlen; 462 463 if (devh == NULL) 464 return (LIBUSB_ERROR_INVALID_PARAM); 465 466 if ((wLength != 0) && (data == NULL)) 467 return (LIBUSB_ERROR_INVALID_PARAM); 468 469 LIBUSB20_INIT(LIBUSB20_CONTROL_SETUP, &req); 470 471 req.bmRequestType = bmRequestType; 472 req.bRequest = bRequest; 473 req.wValue = wValue; 474 req.wIndex = wIndex; 475 req.wLength = wLength; 476 477 err = libusb20_dev_request_sync(devh, &req, data, 478 &actlen, timeout, 0); 479 480 if (err == LIBUSB20_ERROR_PIPE) 481 return (LIBUSB_ERROR_PIPE); 482 else if (err == LIBUSB20_ERROR_TIMEOUT) 483 return (LIBUSB_ERROR_TIMEOUT); 484 else if (err) 485 return (LIBUSB_ERROR_NO_DEVICE); 486 487 return (actlen); 488 } 489 490 static void 491 libusb10_do_transfer_cb(struct libusb_transfer *transfer) 492 { 493 libusb_context *ctx; 494 int *pdone; 495 496 ctx = GET_CONTEXT(NULL); 497 498 DPRINTF(ctx, LIBUSB_DEBUG_TRANSFER, "sync I/O done"); 499 500 pdone = transfer->user_data; 501 *pdone = 1; 502 } 503 504 /* 505 * TODO: Replace the following function. Allocating and freeing on a 506 * per-transfer basis is slow. --HPS 507 */ 508 static int 509 libusb10_do_transfer(libusb_device_handle *devh, 510 uint8_t endpoint, uint8_t *data, int length, 511 int *transferred, unsigned int timeout, int type) 512 { 513 libusb_context *ctx; 514 struct libusb_transfer *xfer; 515 int done; 516 int ret; 517 518 if (devh == NULL) 519 return (LIBUSB_ERROR_INVALID_PARAM); 520 521 if ((length != 0) && (data == NULL)) 522 return (LIBUSB_ERROR_INVALID_PARAM); 523 524 xfer = libusb_alloc_transfer(0); 525 if (xfer == NULL) 526 return (LIBUSB_ERROR_NO_MEM); 527 528 ctx = libusb_get_device(devh)->ctx; 529 530 xfer->dev_handle = devh; 531 xfer->endpoint = endpoint; 532 xfer->type = type; 533 xfer->timeout = timeout; 534 xfer->buffer = data; 535 xfer->length = length; 536 xfer->user_data = (void *)&done; 537 xfer->callback = libusb10_do_transfer_cb; 538 done = 0; 539 540 if ((ret = libusb_submit_transfer(xfer)) < 0) { 541 libusb_free_transfer(xfer); 542 return (ret); 543 } 544 while (done == 0) { 545 if ((ret = libusb_handle_events(ctx)) < 0) { 546 libusb_cancel_transfer(xfer); 547 usleep(1000); /* nice it */ 548 } 549 } 550 551 *transferred = xfer->actual_length; 552 553 switch (xfer->status) { 554 case LIBUSB_TRANSFER_COMPLETED: 555 ret = 0; 556 break; 557 case LIBUSB_TRANSFER_TIMED_OUT: 558 ret = LIBUSB_ERROR_TIMEOUT; 559 break; 560 case LIBUSB_TRANSFER_OVERFLOW: 561 ret = LIBUSB_ERROR_OVERFLOW; 562 break; 563 case LIBUSB_TRANSFER_STALL: 564 ret = LIBUSB_ERROR_PIPE; 565 break; 566 case LIBUSB_TRANSFER_NO_DEVICE: 567 ret = LIBUSB_ERROR_NO_DEVICE; 568 break; 569 default: 570 ret = LIBUSB_ERROR_OTHER; 571 break; 572 } 573 574 libusb_free_transfer(xfer); 575 return (ret); 576 } 577 578 int 579 libusb_bulk_transfer(libusb_device_handle *devh, 580 uint8_t endpoint, uint8_t *data, int length, 581 int *transferred, unsigned int timeout) 582 { 583 libusb_context *ctx; 584 int ret; 585 586 ctx = GET_CONTEXT(NULL); 587 DPRINTF(ctx, LIBUSB_DEBUG_FUNCTION, "libusb_bulk_transfer enter"); 588 589 ret = libusb10_do_transfer(devh, endpoint, data, length, transferred, 590 timeout, LIBUSB_TRANSFER_TYPE_BULK); 591 592 DPRINTF(ctx, LIBUSB_DEBUG_FUNCTION, "libusb_bulk_transfer leave"); 593 return (ret); 594 } 595 596 int 597 libusb_interrupt_transfer(libusb_device_handle *devh, 598 uint8_t endpoint, uint8_t *data, int length, 599 int *transferred, unsigned int timeout) 600 { 601 libusb_context *ctx; 602 int ret; 603 604 ctx = GET_CONTEXT(NULL); 605 DPRINTF(ctx, LIBUSB_DEBUG_FUNCTION, "libusb_interrupt_transfer enter"); 606 607 ret = libusb10_do_transfer(devh, endpoint, data, length, transferred, 608 timeout, LIBUSB_TRANSFER_TYPE_INTERRUPT); 609 610 DPRINTF(ctx, LIBUSB_DEBUG_FUNCTION, "libusb_interrupt_transfer leave"); 611 return (ret); 612 } 613 614 uint8_t * 615 libusb_get_iso_packet_buffer(struct libusb_transfer *transfer, uint32_t off) 616 { 617 uint8_t *ptr; 618 uint32_t n; 619 620 if (transfer->num_iso_packets < 0) 621 return (NULL); 622 623 if (off >= (uint32_t)transfer->num_iso_packets) 624 return (NULL); 625 626 ptr = transfer->buffer; 627 if (ptr == NULL) 628 return (NULL); 629 630 for (n = 0; n != off; n++) { 631 ptr += transfer->iso_packet_desc[n].length; 632 } 633 return (ptr); 634 } 635 636 uint8_t * 637 libusb_get_iso_packet_buffer_simple(struct libusb_transfer *transfer, uint32_t off) 638 { 639 uint8_t *ptr; 640 641 if (transfer->num_iso_packets < 0) 642 return (NULL); 643 644 if (off >= (uint32_t)transfer->num_iso_packets) 645 return (NULL); 646 647 ptr = transfer->buffer; 648 if (ptr == NULL) 649 return (NULL); 650 651 ptr += transfer->iso_packet_desc[0].length * off; 652 653 return (ptr); 654 } 655 656 void 657 libusb_set_iso_packet_lengths(struct libusb_transfer *transfer, uint32_t length) 658 { 659 int n; 660 661 if (transfer->num_iso_packets < 0) 662 return; 663 664 for (n = 0; n != transfer->num_iso_packets; n++) 665 transfer->iso_packet_desc[n].length = length; 666 } 667 668 uint8_t * 669 libusb_control_transfer_get_data(struct libusb_transfer *transfer) 670 { 671 if (transfer->buffer == NULL) 672 return (NULL); 673 674 return (transfer->buffer + LIBUSB_CONTROL_SETUP_SIZE); 675 } 676 677 struct libusb_control_setup * 678 libusb_control_transfer_get_setup(struct libusb_transfer *transfer) 679 { 680 return ((struct libusb_control_setup *)transfer->buffer); 681 } 682 683 void 684 libusb_fill_control_setup(uint8_t *buf, uint8_t bmRequestType, 685 uint8_t bRequest, uint16_t wValue, 686 uint16_t wIndex, uint16_t wLength) 687 { 688 struct libusb_control_setup *req = (struct libusb_control_setup *)buf; 689 690 /* The alignment is OK for all fields below. */ 691 req->bmRequestType = bmRequestType; 692 req->bRequest = bRequest; 693 req->wValue = htole16(wValue); 694 req->wIndex = htole16(wIndex); 695 req->wLength = htole16(wLength); 696 } 697 698 void 699 libusb_fill_control_transfer(struct libusb_transfer *transfer, 700 libusb_device_handle *devh, uint8_t *buf, 701 libusb_transfer_cb_fn callback, void *user_data, 702 uint32_t timeout) 703 { 704 struct libusb_control_setup *setup = (struct libusb_control_setup *)buf; 705 706 transfer->dev_handle = devh; 707 transfer->endpoint = 0; 708 transfer->type = LIBUSB_TRANSFER_TYPE_CONTROL; 709 transfer->timeout = timeout; 710 transfer->buffer = buf; 711 if (setup != NULL) 712 transfer->length = LIBUSB_CONTROL_SETUP_SIZE 713 + le16toh(setup->wLength); 714 else 715 transfer->length = 0; 716 transfer->user_data = user_data; 717 transfer->callback = callback; 718 719 } 720 721 void 722 libusb_fill_bulk_transfer(struct libusb_transfer *transfer, 723 libusb_device_handle *devh, uint8_t endpoint, uint8_t *buf, 724 int length, libusb_transfer_cb_fn callback, void *user_data, 725 uint32_t timeout) 726 { 727 transfer->dev_handle = devh; 728 transfer->endpoint = endpoint; 729 transfer->type = LIBUSB_TRANSFER_TYPE_BULK; 730 transfer->timeout = timeout; 731 transfer->buffer = buf; 732 transfer->length = length; 733 transfer->user_data = user_data; 734 transfer->callback = callback; 735 } 736 737 void 738 libusb_fill_interrupt_transfer(struct libusb_transfer *transfer, 739 libusb_device_handle *devh, uint8_t endpoint, uint8_t *buf, 740 int length, libusb_transfer_cb_fn callback, void *user_data, 741 uint32_t timeout) 742 { 743 transfer->dev_handle = devh; 744 transfer->endpoint = endpoint; 745 transfer->type = LIBUSB_TRANSFER_TYPE_INTERRUPT; 746 transfer->timeout = timeout; 747 transfer->buffer = buf; 748 transfer->length = length; 749 transfer->user_data = user_data; 750 transfer->callback = callback; 751 } 752 753 void 754 libusb_fill_iso_transfer(struct libusb_transfer *transfer, 755 libusb_device_handle *devh, uint8_t endpoint, uint8_t *buf, 756 int length, int npacket, libusb_transfer_cb_fn callback, 757 void *user_data, uint32_t timeout) 758 { 759 transfer->dev_handle = devh; 760 transfer->endpoint = endpoint; 761 transfer->type = LIBUSB_TRANSFER_TYPE_ISOCHRONOUS; 762 transfer->timeout = timeout; 763 transfer->buffer = buf; 764 transfer->length = length; 765 transfer->num_iso_packets = npacket; 766 transfer->user_data = user_data; 767 transfer->callback = callback; 768 } 769 770