lib/libusb/libusb10_io.c

   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