libusb10.c revision 219100
1/* $FreeBSD: head/lib/libusb/libusb10.c 219100 2011-02-28 17:23:15Z hselasky $ */ 2/*- 3 * Copyright (c) 2009 Sylvestre Gallon. All rights reserved. 4 * Copyright (c) 2009 Hans Petter Selasky. All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25 * SUCH DAMAGE. 26 */ 27 28#include <sys/fcntl.h> 29#include <sys/ioctl.h> 30#include <sys/queue.h> 31 32#include <assert.h> 33#include <errno.h> 34#include <poll.h> 35#include <pthread.h> 36#include <stdio.h> 37#include <stdlib.h> 38#include <unistd.h> 39 40#define libusb_device_handle libusb20_device 41 42#include "libusb20.h" 43#include "libusb20_desc.h" 44#include "libusb20_int.h" 45#include "libusb.h" 46#include "libusb10.h" 47 48static pthread_mutex_t default_context_lock = PTHREAD_MUTEX_INITIALIZER; 49struct libusb_context *usbi_default_context = NULL; 50 51/* Prototypes */ 52 53static struct libusb20_transfer *libusb10_get_transfer(struct libusb20_device *, uint8_t, uint8_t); 54static int libusb10_get_buffsize(struct libusb20_device *, libusb_transfer *); 55static int libusb10_convert_error(uint8_t status); 56static void libusb10_complete_transfer(struct libusb20_transfer *, struct libusb_super_transfer *, int); 57static void libusb10_isoc_proxy(struct libusb20_transfer *); 58static void libusb10_bulk_intr_proxy(struct libusb20_transfer *); 59static void libusb10_ctrl_proxy(struct libusb20_transfer *); 60static void libusb10_submit_transfer_sub(struct libusb20_device *, uint8_t); 61 62/* Library initialisation / deinitialisation */ 63 64void 65libusb_set_debug(libusb_context *ctx, int level) 66{ 67 ctx = GET_CONTEXT(ctx); 68 if (ctx) 69 ctx->debug = level; 70} 71 72static void 73libusb_set_nonblocking(int f) 74{ 75 int flags; 76 77 /* 78 * We ignore any failures in this function, hence the 79 * non-blocking flag is not critical to the operation of 80 * libUSB. We use F_GETFL and F_SETFL to be compatible with 81 * Linux. 82 */ 83 84 flags = fcntl(f, F_GETFL, NULL); 85 if (flags == -1) 86 return; 87 flags |= O_NONBLOCK; 88 fcntl(f, F_SETFL, flags); 89} 90 91int 92libusb_init(libusb_context **context) 93{ 94 struct libusb_context *ctx; 95 char *debug; 96 int ret; 97 98 ctx = malloc(sizeof(*ctx)); 99 if (!ctx) 100 return (LIBUSB_ERROR_INVALID_PARAM); 101 102 memset(ctx, 0, sizeof(*ctx)); 103 104 debug = getenv("LIBUSB_DEBUG"); 105 if (debug != NULL) { 106 ctx->debug = atoi(debug); 107 if (ctx->debug != 0) 108 ctx->debug_fixed = 1; 109 } 110 TAILQ_INIT(&ctx->pollfds); 111 TAILQ_INIT(&ctx->tr_done); 112 113 pthread_mutex_init(&ctx->ctx_lock, NULL); 114 pthread_cond_init(&ctx->ctx_cond, NULL); 115 116 ctx->ctx_handler = NO_THREAD; 117 118 ret = pipe(ctx->ctrl_pipe); 119 if (ret < 0) { 120 pthread_mutex_destroy(&ctx->ctx_lock); 121 pthread_cond_destroy(&ctx->ctx_cond); 122 free(ctx); 123 return (LIBUSB_ERROR_OTHER); 124 } 125 /* set non-blocking mode on the control pipe to avoid deadlock */ 126 libusb_set_nonblocking(ctx->ctrl_pipe[0]); 127 libusb_set_nonblocking(ctx->ctrl_pipe[1]); 128 129 libusb10_add_pollfd(ctx, &ctx->ctx_poll, NULL, ctx->ctrl_pipe[0], POLLIN); 130 131 pthread_mutex_lock(&default_context_lock); 132 if (usbi_default_context == NULL) { 133 usbi_default_context = ctx; 134 } 135 pthread_mutex_unlock(&default_context_lock); 136 137 if (context) 138 *context = ctx; 139 140 DPRINTF(ctx, LIBUSB_DEBUG_FUNCTION, "libusb_init complete"); 141 142 return (0); 143} 144 145void 146libusb_exit(libusb_context *ctx) 147{ 148 ctx = GET_CONTEXT(ctx); 149 150 if (ctx == NULL) 151 return; 152 153 /* XXX cleanup devices */ 154 155 libusb10_remove_pollfd(ctx, &ctx->ctx_poll); 156 close(ctx->ctrl_pipe[0]); 157 close(ctx->ctrl_pipe[1]); 158 pthread_mutex_destroy(&ctx->ctx_lock); 159 pthread_cond_destroy(&ctx->ctx_cond); 160 161 pthread_mutex_lock(&default_context_lock); 162 if (ctx == usbi_default_context) { 163 usbi_default_context = NULL; 164 } 165 pthread_mutex_unlock(&default_context_lock); 166 167 free(ctx); 168} 169 170/* Device handling and initialisation. */ 171 172ssize_t 173libusb_get_device_list(libusb_context *ctx, libusb_device ***list) 174{ 175 struct libusb20_backend *usb_backend; 176 struct libusb20_device *pdev; 177 struct libusb_device *dev; 178 int i; 179 180 ctx = GET_CONTEXT(ctx); 181 182 if (ctx == NULL) 183 return (LIBUSB_ERROR_INVALID_PARAM); 184 185 if (list == NULL) 186 return (LIBUSB_ERROR_INVALID_PARAM); 187 188 usb_backend = libusb20_be_alloc_default(); 189 if (usb_backend == NULL) 190 return (LIBUSB_ERROR_NO_MEM); 191 192 /* figure out how many USB devices are present */ 193 pdev = NULL; 194 i = 0; 195 while ((pdev = libusb20_be_device_foreach(usb_backend, pdev))) 196 i++; 197 198 /* allocate device pointer list */ 199 *list = malloc((i + 1) * sizeof(void *)); 200 if (*list == NULL) { 201 libusb20_be_free(usb_backend); 202 return (LIBUSB_ERROR_NO_MEM); 203 } 204 /* create libusb v1.0 compliant devices */ 205 i = 0; 206 while ((pdev = libusb20_be_device_foreach(usb_backend, NULL))) { 207 208 dev = malloc(sizeof(*dev)); 209 if (dev == NULL) { 210 while (i != 0) { 211 libusb_unref_device((*list)[i - 1]); 212 i--; 213 } 214 free(*list); 215 *list = NULL; 216 libusb20_be_free(usb_backend); 217 return (LIBUSB_ERROR_NO_MEM); 218 } 219 220 /* get device into libUSB v1.0 list */ 221 libusb20_be_dequeue_device(usb_backend, pdev); 222 223 memset(dev, 0, sizeof(*dev)); 224 225 /* init transfer queues */ 226 TAILQ_INIT(&dev->tr_head); 227 228 /* set context we belong to */ 229 dev->ctx = ctx; 230 231 /* link together the two structures */ 232 dev->os_priv = pdev; 233 pdev->privLuData = dev; 234 235 (*list)[i] = libusb_ref_device(dev); 236 i++; 237 } 238 (*list)[i] = NULL; 239 240 libusb20_be_free(usb_backend); 241 return (i); 242} 243 244void 245libusb_free_device_list(libusb_device **list, int unref_devices) 246{ 247 int i; 248 249 if (list == NULL) 250 return; /* be NULL safe */ 251 252 if (unref_devices) { 253 for (i = 0; list[i] != NULL; i++) 254 libusb_unref_device(list[i]); 255 } 256 free(list); 257} 258 259uint8_t 260libusb_get_bus_number(libusb_device *dev) 261{ 262 if (dev == NULL) 263 return (0); /* should not happen */ 264 return (libusb20_dev_get_bus_number(dev->os_priv)); 265} 266 267uint8_t 268libusb_get_device_address(libusb_device *dev) 269{ 270 if (dev == NULL) 271 return (0); /* should not happen */ 272 return (libusb20_dev_get_address(dev->os_priv)); 273} 274 275int 276libusb_get_max_packet_size(libusb_device *dev, uint8_t endpoint) 277{ 278 struct libusb_config_descriptor *pdconf; 279 struct libusb_interface *pinf; 280 struct libusb_interface_descriptor *pdinf; 281 struct libusb_endpoint_descriptor *pdend; 282 int i; 283 int j; 284 int k; 285 int ret; 286 287 if (dev == NULL) 288 return (LIBUSB_ERROR_NO_DEVICE); 289 290 ret = libusb_get_active_config_descriptor(dev, &pdconf); 291 if (ret < 0) 292 return (ret); 293 294 ret = LIBUSB_ERROR_NOT_FOUND; 295 for (i = 0; i < pdconf->bNumInterfaces; i++) { 296 pinf = &pdconf->interface[i]; 297 for (j = 0; j < pinf->num_altsetting; j++) { 298 pdinf = &pinf->altsetting[j]; 299 for (k = 0; k < pdinf->bNumEndpoints; k++) { 300 pdend = &pdinf->endpoint[k]; 301 if (pdend->bEndpointAddress == endpoint) { 302 ret = pdend->wMaxPacketSize; 303 goto out; 304 } 305 } 306 } 307 } 308 309out: 310 libusb_free_config_descriptor(pdconf); 311 return (ret); 312} 313 314libusb_device * 315libusb_ref_device(libusb_device *dev) 316{ 317 if (dev == NULL) 318 return (NULL); /* be NULL safe */ 319 320 CTX_LOCK(dev->ctx); 321 dev->refcnt++; 322 CTX_UNLOCK(dev->ctx); 323 324 return (dev); 325} 326 327void 328libusb_unref_device(libusb_device *dev) 329{ 330 if (dev == NULL) 331 return; /* be NULL safe */ 332 333 CTX_LOCK(dev->ctx); 334 dev->refcnt--; 335 CTX_UNLOCK(dev->ctx); 336 337 if (dev->refcnt == 0) { 338 libusb20_dev_free(dev->os_priv); 339 free(dev); 340 } 341} 342 343int 344libusb_open(libusb_device *dev, libusb_device_handle **devh) 345{ 346 libusb_context *ctx = dev->ctx; 347 struct libusb20_device *pdev = dev->os_priv; 348 uint8_t dummy; 349 int err; 350 351 if (devh == NULL) 352 return (LIBUSB_ERROR_INVALID_PARAM); 353 354 /* set default device handle value */ 355 *devh = NULL; 356 357 dev = libusb_ref_device(dev); 358 if (dev == NULL) 359 return (LIBUSB_ERROR_INVALID_PARAM); 360 361 err = libusb20_dev_open(pdev, 16 * 4 /* number of endpoints */ ); 362 if (err) { 363 libusb_unref_device(dev); 364 return (LIBUSB_ERROR_NO_MEM); 365 } 366 libusb10_add_pollfd(ctx, &dev->dev_poll, pdev, libusb20_dev_get_fd(pdev), POLLIN | 367 POLLOUT | POLLRDNORM | POLLWRNORM); 368 369 /* make sure our event loop detects the new device */ 370 dummy = 0; 371 err = write(ctx->ctrl_pipe[1], &dummy, sizeof(dummy)); 372 if (err < (int)sizeof(dummy)) { 373 /* ignore error, if any */ 374 DPRINTF(ctx, LIBUSB_DEBUG_FUNCTION, "libusb_open write failed!"); 375 } 376 *devh = pdev; 377 378 return (0); 379} 380 381libusb_device_handle * 382libusb_open_device_with_vid_pid(libusb_context *ctx, uint16_t vendor_id, 383 uint16_t product_id) 384{ 385 struct libusb_device **devs; 386 struct libusb20_device *pdev; 387 struct LIBUSB20_DEVICE_DESC_DECODED *pdesc; 388 int i; 389 int j; 390 391 ctx = GET_CONTEXT(ctx); 392 if (ctx == NULL) 393 return (NULL); /* be NULL safe */ 394 395 DPRINTF(ctx, LIBUSB_DEBUG_FUNCTION, "libusb_open_device_width_vid_pid enter"); 396 397 if ((i = libusb_get_device_list(ctx, &devs)) < 0) 398 return (NULL); 399 400 for (j = 0; j < i; j++) { 401 pdev = devs[j]->os_priv; 402 pdesc = libusb20_dev_get_device_desc(pdev); 403 /* 404 * NOTE: The USB library will automatically swap the 405 * fields in the device descriptor to be of host 406 * endian type! 407 */ 408 if (pdesc->idVendor == vendor_id && 409 pdesc->idProduct == product_id) { 410 if (libusb_open(devs[j], &pdev) < 0) 411 pdev = NULL; 412 break; 413 } 414 } 415 if (j == i) 416 pdev = NULL; 417 418 libusb_free_device_list(devs, 1); 419 DPRINTF(ctx, LIBUSB_DEBUG_FUNCTION, "libusb_open_device_width_vid_pid leave"); 420 return (pdev); 421} 422 423void 424libusb_close(struct libusb20_device *pdev) 425{ 426 libusb_context *ctx; 427 struct libusb_device *dev; 428 uint8_t dummy; 429 int err; 430 431 if (pdev == NULL) 432 return; /* be NULL safe */ 433 434 dev = libusb_get_device(pdev); 435 ctx = dev->ctx; 436 437 libusb10_remove_pollfd(ctx, &dev->dev_poll); 438 439 libusb20_dev_close(pdev); 440 441 /* unref will free the "pdev" when the refcount reaches zero */ 442 libusb_unref_device(dev); 443 444 /* make sure our event loop detects the closed device */ 445 dummy = 0; 446 err = write(ctx->ctrl_pipe[1], &dummy, sizeof(dummy)); 447 if (err < (int)sizeof(dummy)) { 448 /* ignore error, if any */ 449 DPRINTF(ctx, LIBUSB_DEBUG_FUNCTION, "libusb_close write failed!"); 450 } 451} 452 453libusb_device * 454libusb_get_device(struct libusb20_device *pdev) 455{ 456 if (pdev == NULL) 457 return (NULL); 458 return ((libusb_device *)pdev->privLuData); 459} 460 461int 462libusb_get_configuration(struct libusb20_device *pdev, int *config) 463{ 464 struct libusb20_config *pconf; 465 466 if (pdev == NULL || config == NULL) 467 return (LIBUSB_ERROR_INVALID_PARAM); 468 469 pconf = libusb20_dev_alloc_config(pdev, libusb20_dev_get_config_index(pdev)); 470 if (pconf == NULL) 471 return (LIBUSB_ERROR_NO_MEM); 472 473 *config = pconf->desc.bConfigurationValue; 474 475 free(pconf); 476 477 return (0); 478} 479 480int 481libusb_set_configuration(struct libusb20_device *pdev, int configuration) 482{ 483 struct libusb20_config *pconf; 484 struct libusb_device *dev; 485 int err; 486 uint8_t i; 487 488 dev = libusb_get_device(pdev); 489 if (dev == NULL) 490 return (LIBUSB_ERROR_INVALID_PARAM); 491 492 if (configuration < 1) { 493 /* unconfigure */ 494 i = 255; 495 } else { 496 for (i = 0; i != 255; i++) { 497 uint8_t found; 498 499 pconf = libusb20_dev_alloc_config(pdev, i); 500 if (pconf == NULL) 501 return (LIBUSB_ERROR_INVALID_PARAM); 502 found = (pconf->desc.bConfigurationValue 503 == configuration); 504 free(pconf); 505 506 if (found) 507 goto set_config; 508 } 509 return (LIBUSB_ERROR_INVALID_PARAM); 510 } 511 512set_config: 513 514 libusb10_cancel_all_transfer(dev); 515 516 libusb10_remove_pollfd(dev->ctx, &dev->dev_poll); 517 518 err = libusb20_dev_set_config_index(pdev, i); 519 520 libusb10_add_pollfd(dev->ctx, &dev->dev_poll, pdev, libusb20_dev_get_fd(pdev), POLLIN | 521 POLLOUT | POLLRDNORM | POLLWRNORM); 522 523 return (err ? LIBUSB_ERROR_INVALID_PARAM : 0); 524} 525 526int 527libusb_claim_interface(struct libusb20_device *pdev, int interface_number) 528{ 529 libusb_device *dev; 530 int err = 0; 531 532 dev = libusb_get_device(pdev); 533 if (dev == NULL) 534 return (LIBUSB_ERROR_INVALID_PARAM); 535 536 if (interface_number < 0 || interface_number > 31) 537 return (LIBUSB_ERROR_INVALID_PARAM); 538 539 CTX_LOCK(dev->ctx); 540 if (dev->claimed_interfaces & (1 << interface_number)) 541 err = LIBUSB_ERROR_BUSY; 542 543 if (!err) 544 dev->claimed_interfaces |= (1 << interface_number); 545 CTX_UNLOCK(dev->ctx); 546 return (err); 547} 548 549int 550libusb_release_interface(struct libusb20_device *pdev, int interface_number) 551{ 552 libusb_device *dev; 553 int err = 0; 554 555 dev = libusb_get_device(pdev); 556 if (dev == NULL) 557 return (LIBUSB_ERROR_INVALID_PARAM); 558 559 if (interface_number < 0 || interface_number > 31) 560 return (LIBUSB_ERROR_INVALID_PARAM); 561 562 CTX_LOCK(dev->ctx); 563 if (!(dev->claimed_interfaces & (1 << interface_number))) 564 err = LIBUSB_ERROR_NOT_FOUND; 565 566 if (!err) 567 dev->claimed_interfaces &= ~(1 << interface_number); 568 CTX_UNLOCK(dev->ctx); 569 return (err); 570} 571 572int 573libusb_set_interface_alt_setting(struct libusb20_device *pdev, 574 int interface_number, int alternate_setting) 575{ 576 libusb_device *dev; 577 int err = 0; 578 579 dev = libusb_get_device(pdev); 580 if (dev == NULL) 581 return (LIBUSB_ERROR_INVALID_PARAM); 582 583 if (interface_number < 0 || interface_number > 31) 584 return (LIBUSB_ERROR_INVALID_PARAM); 585 586 CTX_LOCK(dev->ctx); 587 if (!(dev->claimed_interfaces & (1 << interface_number))) 588 err = LIBUSB_ERROR_NOT_FOUND; 589 CTX_UNLOCK(dev->ctx); 590 591 if (err) 592 return (err); 593 594 libusb10_cancel_all_transfer(dev); 595 596 libusb10_remove_pollfd(dev->ctx, &dev->dev_poll); 597 598 err = libusb20_dev_set_alt_index(pdev, 599 interface_number, alternate_setting); 600 601 libusb10_add_pollfd(dev->ctx, &dev->dev_poll, 602 pdev, libusb20_dev_get_fd(pdev), 603 POLLIN | POLLOUT | POLLRDNORM | POLLWRNORM); 604 605 return (err ? LIBUSB_ERROR_OTHER : 0); 606} 607 608static struct libusb20_transfer * 609libusb10_get_transfer(struct libusb20_device *pdev, 610 uint8_t endpoint, uint8_t index) 611{ 612 index &= 1; /* double buffering */ 613 614 index |= (endpoint & LIBUSB20_ENDPOINT_ADDRESS_MASK) * 4; 615 616 if (endpoint & LIBUSB20_ENDPOINT_DIR_MASK) { 617 /* this is an IN endpoint */ 618 index |= 2; 619 } 620 return (libusb20_tr_get_pointer(pdev, index)); 621} 622 623int 624libusb_clear_halt(struct libusb20_device *pdev, uint8_t endpoint) 625{ 626 struct libusb20_transfer *xfer; 627 struct libusb_device *dev; 628 int err; 629 630 xfer = libusb10_get_transfer(pdev, endpoint, 0); 631 if (xfer == NULL) 632 return (LIBUSB_ERROR_INVALID_PARAM); 633 634 dev = libusb_get_device(pdev); 635 if (dev == NULL) 636 return (LIBUSB_ERROR_INVALID_PARAM); 637 638 CTX_LOCK(dev->ctx); 639 err = libusb20_tr_open(xfer, 0, 0, endpoint); 640 CTX_UNLOCK(dev->ctx); 641 642 if (err != 0 && err != LIBUSB20_ERROR_BUSY) 643 return (LIBUSB_ERROR_OTHER); 644 645 libusb20_tr_clear_stall_sync(xfer); 646 647 /* check if we opened the transfer */ 648 if (err == 0) { 649 CTX_LOCK(dev->ctx); 650 libusb20_tr_close(xfer); 651 CTX_UNLOCK(dev->ctx); 652 } 653 return (0); /* success */ 654} 655 656int 657libusb_reset_device(struct libusb20_device *pdev) 658{ 659 libusb_device *dev; 660 int err; 661 662 dev = libusb_get_device(pdev); 663 if (dev == NULL) 664 return (LIBUSB_ERROR_INVALID_PARAM); 665 666 libusb10_cancel_all_transfer(dev); 667 668 libusb10_remove_pollfd(dev->ctx, &dev->dev_poll); 669 670 err = libusb20_dev_reset(pdev); 671 672 libusb10_add_pollfd(dev->ctx, &dev->dev_poll, 673 pdev, libusb20_dev_get_fd(pdev), 674 POLLIN | POLLOUT | POLLRDNORM | POLLWRNORM); 675 676 return (err ? LIBUSB_ERROR_OTHER : 0); 677} 678 679int 680libusb_check_connected(struct libusb20_device *pdev) 681{ 682 libusb_device *dev; 683 int err; 684 685 dev = libusb_get_device(pdev); 686 if (dev == NULL) 687 return (LIBUSB_ERROR_INVALID_PARAM); 688 689 err = libusb20_dev_check_connected(pdev); 690 691 return (err ? LIBUSB_ERROR_NO_DEVICE : 0); 692} 693 694int 695libusb_kernel_driver_active(struct libusb20_device *pdev, int interface) 696{ 697 if (pdev == NULL) 698 return (LIBUSB_ERROR_INVALID_PARAM); 699 700 return (libusb20_dev_kernel_driver_active( 701 pdev, interface)); 702} 703 704int 705libusb_get_driver_np(struct libusb20_device *pdev, int interface, 706 char *name, int namelen) 707{ 708 return (libusb_get_driver(pdev, interface, name, namelen)); 709} 710 711int 712libusb_get_driver(struct libusb20_device *pdev, int interface, 713 char *name, int namelen) 714{ 715 char *ptr; 716 int err; 717 718 if (pdev == NULL) 719 return (LIBUSB_ERROR_INVALID_PARAM); 720 if (namelen < 1) 721 return (LIBUSB_ERROR_INVALID_PARAM); 722 723 err = libusb20_dev_get_iface_desc( 724 pdev, interface, name, namelen); 725 726 if (err != 0) 727 return (LIBUSB_ERROR_OTHER); 728 729 /* we only want the driver name */ 730 ptr = strstr(name, ":"); 731 if (ptr != NULL) 732 *ptr = 0; 733 734 return (0); 735} 736 737int 738libusb_detach_kernel_driver_np(struct libusb20_device *pdev, int interface) 739{ 740 return (libusb_detach_kernel_driver(pdev, interface)); 741} 742 743int 744libusb_detach_kernel_driver(struct libusb20_device *pdev, int interface) 745{ 746 int err; 747 748 if (pdev == NULL) 749 return (LIBUSB_ERROR_INVALID_PARAM); 750 751 err = libusb20_dev_detach_kernel_driver( 752 pdev, interface); 753 754 return (err ? LIBUSB_ERROR_OTHER : 0); 755} 756 757int 758libusb_attach_kernel_driver(struct libusb20_device *pdev, int interface) 759{ 760 if (pdev == NULL) 761 return (LIBUSB_ERROR_INVALID_PARAM); 762 /* stub - currently not supported by libusb20 */ 763 return (0); 764} 765 766/* Asynchronous device I/O */ 767 768struct libusb_transfer * 769libusb_alloc_transfer(int iso_packets) 770{ 771 struct libusb_transfer *uxfer; 772 struct libusb_super_transfer *sxfer; 773 int len; 774 775 len = sizeof(struct libusb_transfer) + 776 sizeof(struct libusb_super_transfer) + 777 (iso_packets * sizeof(libusb_iso_packet_descriptor)); 778 779 sxfer = malloc(len); 780 if (sxfer == NULL) 781 return (NULL); 782 783 memset(sxfer, 0, len); 784 785 uxfer = (struct libusb_transfer *)( 786 ((uint8_t *)sxfer) + sizeof(*sxfer)); 787 788 /* set default value */ 789 uxfer->num_iso_packets = iso_packets; 790 791 return (uxfer); 792} 793 794void 795libusb_free_transfer(struct libusb_transfer *uxfer) 796{ 797 struct libusb_super_transfer *sxfer; 798 799 if (uxfer == NULL) 800 return; /* be NULL safe */ 801 802 /* check if we should free the transfer buffer */ 803 if (uxfer->flags & LIBUSB_TRANSFER_FREE_BUFFER) 804 free(uxfer->buffer); 805 806 sxfer = (struct libusb_super_transfer *)( 807 (uint8_t *)uxfer - sizeof(*sxfer)); 808 809 free(sxfer); 810} 811 812static uint32_t 813libusb10_get_maxframe(struct libusb20_device *pdev, libusb_transfer *xfer) 814{ 815 uint32_t ret; 816 817 switch (xfer->type) { 818 case LIBUSB_TRANSFER_TYPE_ISOCHRONOUS: 819 ret = 60 | LIBUSB20_MAX_FRAME_PRE_SCALE; /* 60ms */ 820 break; 821 case LIBUSB_TRANSFER_TYPE_CONTROL: 822 ret = 2; 823 break; 824 default: 825 ret = 1; 826 break; 827 } 828 return (ret); 829} 830 831static int 832libusb10_get_buffsize(struct libusb20_device *pdev, libusb_transfer *xfer) 833{ 834 int ret; 835 int usb_speed; 836 837 usb_speed = libusb20_dev_get_speed(pdev); 838 839 switch (xfer->type) { 840 case LIBUSB_TRANSFER_TYPE_ISOCHRONOUS: 841 ret = 0; /* kernel will auto-select */ 842 break; 843 case LIBUSB_TRANSFER_TYPE_CONTROL: 844 ret = 1024; 845 break; 846 default: 847 switch (usb_speed) { 848 case LIBUSB20_SPEED_LOW: 849 ret = 256; 850 break; 851 case LIBUSB20_SPEED_FULL: 852 ret = 4096; 853 break; 854 default: 855 ret = 16384; 856 break; 857 } 858 break; 859 } 860 return (ret); 861} 862 863static int 864libusb10_convert_error(uint8_t status) 865{ 866 ; /* indent fix */ 867 868 switch (status) { 869 case LIBUSB20_TRANSFER_START: 870 case LIBUSB20_TRANSFER_COMPLETED: 871 return (LIBUSB_TRANSFER_COMPLETED); 872 case LIBUSB20_TRANSFER_OVERFLOW: 873 return (LIBUSB_TRANSFER_OVERFLOW); 874 case LIBUSB20_TRANSFER_NO_DEVICE: 875 return (LIBUSB_TRANSFER_NO_DEVICE); 876 case LIBUSB20_TRANSFER_STALL: 877 return (LIBUSB_TRANSFER_STALL); 878 case LIBUSB20_TRANSFER_CANCELLED: 879 return (LIBUSB_TRANSFER_CANCELLED); 880 case LIBUSB20_TRANSFER_TIMED_OUT: 881 return (LIBUSB_TRANSFER_TIMED_OUT); 882 default: 883 return (LIBUSB_TRANSFER_ERROR); 884 } 885} 886 887/* This function must be called locked */ 888 889static void 890libusb10_complete_transfer(struct libusb20_transfer *pxfer, 891 struct libusb_super_transfer *sxfer, int status) 892{ 893 struct libusb_transfer *uxfer; 894 struct libusb_device *dev; 895 896 uxfer = (struct libusb_transfer *)( 897 ((uint8_t *)sxfer) + sizeof(*sxfer)); 898 899 if (pxfer != NULL) 900 libusb20_tr_set_priv_sc1(pxfer, NULL); 901 902 /* set transfer status */ 903 uxfer->status = status; 904 905 /* update super transfer state */ 906 sxfer->state = LIBUSB_SUPER_XFER_ST_NONE; 907 908 dev = libusb_get_device(uxfer->dev_handle); 909 910 TAILQ_INSERT_TAIL(&dev->ctx->tr_done, sxfer, entry); 911} 912 913/* This function must be called locked */ 914 915static void 916libusb10_isoc_proxy(struct libusb20_transfer *pxfer) 917{ 918 struct libusb_super_transfer *sxfer; 919 struct libusb_transfer *uxfer; 920 uint32_t actlen; 921 uint16_t iso_packets; 922 uint16_t i; 923 uint8_t status; 924 uint8_t flags; 925 926 status = libusb20_tr_get_status(pxfer); 927 sxfer = libusb20_tr_get_priv_sc1(pxfer); 928 actlen = libusb20_tr_get_actual_length(pxfer); 929 iso_packets = libusb20_tr_get_max_frames(pxfer); 930 931 if (sxfer == NULL) 932 return; /* cancelled - nothing to do */ 933 934 uxfer = (struct libusb_transfer *)( 935 ((uint8_t *)sxfer) + sizeof(*sxfer)); 936 937 if (iso_packets > uxfer->num_iso_packets) 938 iso_packets = uxfer->num_iso_packets; 939 940 if (iso_packets == 0) 941 return; /* nothing to do */ 942 943 /* make sure that the number of ISOCHRONOUS packets is valid */ 944 uxfer->num_iso_packets = iso_packets; 945 946 flags = uxfer->flags; 947 948 switch (status) { 949 case LIBUSB20_TRANSFER_COMPLETED: 950 951 /* update actual length */ 952 uxfer->actual_length = actlen; 953 for (i = 0; i != iso_packets; i++) { 954 uxfer->iso_packet_desc[i].actual_length = 955 libusb20_tr_get_length(pxfer, i); 956 } 957 libusb10_complete_transfer(pxfer, sxfer, LIBUSB_TRANSFER_COMPLETED); 958 break; 959 960 case LIBUSB20_TRANSFER_START: 961 962 /* setup length(s) */ 963 actlen = 0; 964 for (i = 0; i != iso_packets; i++) { 965 libusb20_tr_setup_isoc(pxfer, 966 &uxfer->buffer[actlen], 967 uxfer->iso_packet_desc[i].length, i); 968 actlen += uxfer->iso_packet_desc[i].length; 969 } 970 971 /* no remainder */ 972 sxfer->rem_len = 0; 973 974 libusb20_tr_set_total_frames(pxfer, iso_packets); 975 libusb20_tr_submit(pxfer); 976 977 /* fork another USB transfer, if any */ 978 libusb10_submit_transfer_sub(libusb20_tr_get_priv_sc0(pxfer), uxfer->endpoint); 979 break; 980 981 default: 982 libusb10_complete_transfer(pxfer, sxfer, libusb10_convert_error(status)); 983 break; 984 } 985} 986 987/* This function must be called locked */ 988 989static void 990libusb10_bulk_intr_proxy(struct libusb20_transfer *pxfer) 991{ 992 struct libusb_super_transfer *sxfer; 993 struct libusb_transfer *uxfer; 994 uint32_t max_bulk; 995 uint32_t actlen; 996 uint8_t status; 997 uint8_t flags; 998 999 status = libusb20_tr_get_status(pxfer); 1000 sxfer = libusb20_tr_get_priv_sc1(pxfer); 1001 max_bulk = libusb20_tr_get_max_total_length(pxfer); 1002 actlen = libusb20_tr_get_actual_length(pxfer); 1003 1004 if (sxfer == NULL) 1005 return; /* cancelled - nothing to do */ 1006 1007 uxfer = (struct libusb_transfer *)( 1008 ((uint8_t *)sxfer) + sizeof(*sxfer)); 1009 1010 flags = uxfer->flags; 1011 1012 switch (status) { 1013 case LIBUSB20_TRANSFER_COMPLETED: 1014 1015 uxfer->actual_length += actlen; 1016 1017 /* check for short packet */ 1018 if (sxfer->last_len != actlen) { 1019 if (flags & LIBUSB_TRANSFER_SHORT_NOT_OK) { 1020 libusb10_complete_transfer(pxfer, sxfer, LIBUSB_TRANSFER_ERROR); 1021 } else { 1022 libusb10_complete_transfer(pxfer, sxfer, LIBUSB_TRANSFER_COMPLETED); 1023 } 1024 break; 1025 } 1026 /* check for end of data */ 1027 if (sxfer->rem_len == 0) { 1028 libusb10_complete_transfer(pxfer, sxfer, LIBUSB_TRANSFER_COMPLETED); 1029 break; 1030 } 1031 /* FALLTHROUGH */ 1032 1033 case LIBUSB20_TRANSFER_START: 1034 if (max_bulk > sxfer->rem_len) { 1035 max_bulk = sxfer->rem_len; 1036 } 1037 /* setup new BULK or INTERRUPT transaction */ 1038 libusb20_tr_setup_bulk(pxfer, 1039 sxfer->curr_data, max_bulk, uxfer->timeout); 1040 1041 /* update counters */ 1042 sxfer->last_len = max_bulk; 1043 sxfer->curr_data += max_bulk; 1044 sxfer->rem_len -= max_bulk; 1045 1046 libusb20_tr_submit(pxfer); 1047 1048 /* check if we can fork another USB transfer */ 1049 if (sxfer->rem_len == 0) 1050 libusb10_submit_transfer_sub(libusb20_tr_get_priv_sc0(pxfer), uxfer->endpoint); 1051 break; 1052 1053 default: 1054 libusb10_complete_transfer(pxfer, sxfer, libusb10_convert_error(status)); 1055 break; 1056 } 1057} 1058 1059/* This function must be called locked */ 1060 1061static void 1062libusb10_ctrl_proxy(struct libusb20_transfer *pxfer) 1063{ 1064 struct libusb_super_transfer *sxfer; 1065 struct libusb_transfer *uxfer; 1066 uint32_t max_bulk; 1067 uint32_t actlen; 1068 uint8_t status; 1069 uint8_t flags; 1070 1071 status = libusb20_tr_get_status(pxfer); 1072 sxfer = libusb20_tr_get_priv_sc1(pxfer); 1073 max_bulk = libusb20_tr_get_max_total_length(pxfer); 1074 actlen = libusb20_tr_get_actual_length(pxfer); 1075 1076 if (sxfer == NULL) 1077 return; /* cancelled - nothing to do */ 1078 1079 uxfer = (struct libusb_transfer *)( 1080 ((uint8_t *)sxfer) + sizeof(*sxfer)); 1081 1082 flags = uxfer->flags; 1083 1084 switch (status) { 1085 case LIBUSB20_TRANSFER_COMPLETED: 1086 1087 uxfer->actual_length += actlen; 1088 1089 /* subtract length of SETUP packet, if any */ 1090 actlen -= libusb20_tr_get_length(pxfer, 0); 1091 1092 /* check for short packet */ 1093 if (sxfer->last_len != actlen) { 1094 if (flags & LIBUSB_TRANSFER_SHORT_NOT_OK) { 1095 libusb10_complete_transfer(pxfer, sxfer, LIBUSB_TRANSFER_ERROR); 1096 } else { 1097 libusb10_complete_transfer(pxfer, sxfer, LIBUSB_TRANSFER_COMPLETED); 1098 } 1099 break; 1100 } 1101 /* check for end of data */ 1102 if (sxfer->rem_len == 0) { 1103 libusb10_complete_transfer(pxfer, sxfer, LIBUSB_TRANSFER_COMPLETED); 1104 break; 1105 } 1106 /* FALLTHROUGH */ 1107 1108 case LIBUSB20_TRANSFER_START: 1109 if (max_bulk > sxfer->rem_len) { 1110 max_bulk = sxfer->rem_len; 1111 } 1112 /* setup new CONTROL transaction */ 1113 if (status == LIBUSB20_TRANSFER_COMPLETED) { 1114 /* next fragment - don't send SETUP packet */ 1115 libusb20_tr_set_length(pxfer, 0, 0); 1116 } else { 1117 /* first fragment - send SETUP packet */ 1118 libusb20_tr_set_length(pxfer, 8, 0); 1119 libusb20_tr_set_buffer(pxfer, uxfer->buffer, 0); 1120 } 1121 1122 if (max_bulk != 0) { 1123 libusb20_tr_set_length(pxfer, max_bulk, 1); 1124 libusb20_tr_set_buffer(pxfer, sxfer->curr_data, 1); 1125 libusb20_tr_set_total_frames(pxfer, 2); 1126 } else { 1127 libusb20_tr_set_total_frames(pxfer, 1); 1128 } 1129 1130 /* update counters */ 1131 sxfer->last_len = max_bulk; 1132 sxfer->curr_data += max_bulk; 1133 sxfer->rem_len -= max_bulk; 1134 1135 libusb20_tr_submit(pxfer); 1136 1137 /* check if we can fork another USB transfer */ 1138 if (sxfer->rem_len == 0) 1139 libusb10_submit_transfer_sub(libusb20_tr_get_priv_sc0(pxfer), uxfer->endpoint); 1140 break; 1141 1142 default: 1143 libusb10_complete_transfer(pxfer, sxfer, libusb10_convert_error(status)); 1144 break; 1145 } 1146} 1147 1148/* The following function must be called locked */ 1149 1150static void 1151libusb10_submit_transfer_sub(struct libusb20_device *pdev, uint8_t endpoint) 1152{ 1153 struct libusb20_transfer *pxfer0; 1154 struct libusb20_transfer *pxfer1; 1155 struct libusb_super_transfer *sxfer; 1156 struct libusb_transfer *uxfer; 1157 struct libusb_device *dev; 1158 int err; 1159 int buffsize; 1160 int maxframe; 1161 int temp; 1162 uint8_t dummy; 1163 1164 dev = libusb_get_device(pdev); 1165 1166 pxfer0 = libusb10_get_transfer(pdev, endpoint, 0); 1167 pxfer1 = libusb10_get_transfer(pdev, endpoint, 1); 1168 1169 if (pxfer0 == NULL || pxfer1 == NULL) 1170 return; /* shouldn't happen */ 1171 1172 temp = 0; 1173 if (libusb20_tr_pending(pxfer0)) 1174 temp |= 1; 1175 if (libusb20_tr_pending(pxfer1)) 1176 temp |= 2; 1177 1178 switch (temp) { 1179 case 3: 1180 /* wait till one of the transfers complete */ 1181 return; 1182 case 2: 1183 sxfer = libusb20_tr_get_priv_sc1(pxfer1); 1184 if (sxfer == NULL) 1185 return; /* cancelling */ 1186 if (sxfer->rem_len) 1187 return; /* cannot queue another one */ 1188 /* swap transfers */ 1189 pxfer1 = pxfer0; 1190 break; 1191 case 1: 1192 sxfer = libusb20_tr_get_priv_sc1(pxfer0); 1193 if (sxfer == NULL) 1194 return; /* cancelling */ 1195 if (sxfer->rem_len) 1196 return; /* cannot queue another one */ 1197 /* swap transfers */ 1198 pxfer0 = pxfer1; 1199 break; 1200 default: 1201 break; 1202 } 1203 1204 /* find next transfer on same endpoint */ 1205 TAILQ_FOREACH(sxfer, &dev->tr_head, entry) { 1206 1207 uxfer = (struct libusb_transfer *)( 1208 ((uint8_t *)sxfer) + sizeof(*sxfer)); 1209 1210 if (uxfer->endpoint == endpoint) { 1211 TAILQ_REMOVE(&dev->tr_head, sxfer, entry); 1212 sxfer->entry.tqe_prev = NULL; 1213 goto found; 1214 } 1215 } 1216 return; /* success */ 1217 1218found: 1219 1220 libusb20_tr_set_priv_sc0(pxfer0, pdev); 1221 libusb20_tr_set_priv_sc1(pxfer0, sxfer); 1222 1223 /* reset super transfer state */ 1224 sxfer->rem_len = uxfer->length; 1225 sxfer->curr_data = uxfer->buffer; 1226 uxfer->actual_length = 0; 1227 1228 switch (uxfer->type) { 1229 case LIBUSB_TRANSFER_TYPE_ISOCHRONOUS: 1230 libusb20_tr_set_callback(pxfer0, libusb10_isoc_proxy); 1231 break; 1232 case LIBUSB_TRANSFER_TYPE_BULK: 1233 case LIBUSB_TRANSFER_TYPE_INTERRUPT: 1234 libusb20_tr_set_callback(pxfer0, libusb10_bulk_intr_proxy); 1235 break; 1236 case LIBUSB_TRANSFER_TYPE_CONTROL: 1237 libusb20_tr_set_callback(pxfer0, libusb10_ctrl_proxy); 1238 if (sxfer->rem_len < 8) 1239 goto failure; 1240 1241 /* remove SETUP packet from data */ 1242 sxfer->rem_len -= 8; 1243 sxfer->curr_data += 8; 1244 break; 1245 default: 1246 goto failure; 1247 } 1248 1249 buffsize = libusb10_get_buffsize(pdev, uxfer); 1250 maxframe = libusb10_get_maxframe(pdev, uxfer); 1251 1252 /* make sure the transfer is opened */ 1253 err = libusb20_tr_open(pxfer0, buffsize, maxframe, endpoint); 1254 if (err && (err != LIBUSB20_ERROR_BUSY)) { 1255 goto failure; 1256 } 1257 libusb20_tr_start(pxfer0); 1258 return; 1259 1260failure: 1261 libusb10_complete_transfer(pxfer0, sxfer, LIBUSB_TRANSFER_ERROR); 1262 1263 /* make sure our event loop spins the done handler */ 1264 dummy = 0; 1265 write(dev->ctx->ctrl_pipe[1], &dummy, sizeof(dummy)); 1266} 1267 1268/* The following function must be called unlocked */ 1269 1270int 1271libusb_submit_transfer(struct libusb_transfer *uxfer) 1272{ 1273 struct libusb20_transfer *pxfer0; 1274 struct libusb20_transfer *pxfer1; 1275 struct libusb_super_transfer *sxfer; 1276 struct libusb_device *dev; 1277 uint32_t endpoint; 1278 int err; 1279 1280 if (uxfer == NULL) 1281 return (LIBUSB_ERROR_INVALID_PARAM); 1282 1283 if (uxfer->dev_handle == NULL) 1284 return (LIBUSB_ERROR_INVALID_PARAM); 1285 1286 endpoint = uxfer->endpoint; 1287 1288 if (endpoint > 255) 1289 return (LIBUSB_ERROR_INVALID_PARAM); 1290 1291 dev = libusb_get_device(uxfer->dev_handle); 1292 1293 DPRINTF(dev->ctx, LIBUSB_DEBUG_FUNCTION, "libusb_submit_transfer enter"); 1294 1295 sxfer = (struct libusb_super_transfer *)( 1296 (uint8_t *)uxfer - sizeof(*sxfer)); 1297 1298 CTX_LOCK(dev->ctx); 1299 1300 pxfer0 = libusb10_get_transfer(uxfer->dev_handle, endpoint, 0); 1301 pxfer1 = libusb10_get_transfer(uxfer->dev_handle, endpoint, 1); 1302 1303 if (pxfer0 == NULL || pxfer1 == NULL) { 1304 err = LIBUSB_ERROR_OTHER; 1305 } else if ((sxfer->entry.tqe_prev != NULL) || 1306 (libusb20_tr_get_priv_sc1(pxfer0) == sxfer) || 1307 (libusb20_tr_get_priv_sc1(pxfer1) == sxfer)) { 1308 err = LIBUSB_ERROR_BUSY; 1309 } else { 1310 1311 /* set pending state */ 1312 sxfer->state = LIBUSB_SUPER_XFER_ST_PEND; 1313 1314 /* insert transfer into transfer head list */ 1315 TAILQ_INSERT_TAIL(&dev->tr_head, sxfer, entry); 1316 1317 /* start work transfers */ 1318 libusb10_submit_transfer_sub( 1319 uxfer->dev_handle, endpoint); 1320 1321 err = 0; /* success */ 1322 } 1323 1324 CTX_UNLOCK(dev->ctx); 1325 1326 DPRINTF(dev->ctx, LIBUSB_DEBUG_FUNCTION, "libusb_submit_transfer leave %d", err); 1327 1328 return (err); 1329} 1330 1331/* Asynchronous transfer cancel */ 1332 1333int 1334libusb_cancel_transfer(struct libusb_transfer *uxfer) 1335{ 1336 struct libusb20_transfer *pxfer0; 1337 struct libusb20_transfer *pxfer1; 1338 struct libusb_super_transfer *sxfer; 1339 struct libusb_device *dev; 1340 uint32_t endpoint; 1341 int retval; 1342 1343 if (uxfer == NULL) 1344 return (LIBUSB_ERROR_INVALID_PARAM); 1345 1346 /* check if not initialised */ 1347 if (uxfer->dev_handle == NULL) 1348 return (LIBUSB_ERROR_NOT_FOUND); 1349 1350 endpoint = uxfer->endpoint; 1351 1352 if (endpoint > 255) 1353 return (LIBUSB_ERROR_INVALID_PARAM); 1354 1355 dev = libusb_get_device(uxfer->dev_handle); 1356 1357 DPRINTF(dev->ctx, LIBUSB_DEBUG_FUNCTION, "libusb_cancel_transfer enter"); 1358 1359 sxfer = (struct libusb_super_transfer *)( 1360 (uint8_t *)uxfer - sizeof(*sxfer)); 1361 1362 retval = 0; 1363 1364 CTX_LOCK(dev->ctx); 1365 1366 pxfer0 = libusb10_get_transfer(uxfer->dev_handle, endpoint, 0); 1367 pxfer1 = libusb10_get_transfer(uxfer->dev_handle, endpoint, 1); 1368 1369 if (sxfer->state != LIBUSB_SUPER_XFER_ST_PEND) { 1370 /* only update the transfer status */ 1371 uxfer->status = LIBUSB_TRANSFER_CANCELLED; 1372 retval = LIBUSB_ERROR_NOT_FOUND; 1373 } else if (sxfer->entry.tqe_prev != NULL) { 1374 /* we are lucky - transfer is on a queue */ 1375 TAILQ_REMOVE(&dev->tr_head, sxfer, entry); 1376 sxfer->entry.tqe_prev = NULL; 1377 libusb10_complete_transfer(NULL, 1378 sxfer, LIBUSB_TRANSFER_CANCELLED); 1379 } else if (pxfer0 == NULL || pxfer1 == NULL) { 1380 /* not started */ 1381 retval = LIBUSB_ERROR_NOT_FOUND; 1382 } else if (libusb20_tr_get_priv_sc1(pxfer0) == sxfer) { 1383 libusb10_complete_transfer(pxfer0, 1384 sxfer, LIBUSB_TRANSFER_CANCELLED); 1385 libusb20_tr_stop(pxfer0); 1386 /* make sure the queue doesn't stall */ 1387 libusb10_submit_transfer_sub( 1388 uxfer->dev_handle, endpoint); 1389 } else if (libusb20_tr_get_priv_sc1(pxfer1) == sxfer) { 1390 libusb10_complete_transfer(pxfer1, 1391 sxfer, LIBUSB_TRANSFER_CANCELLED); 1392 libusb20_tr_stop(pxfer1); 1393 /* make sure the queue doesn't stall */ 1394 libusb10_submit_transfer_sub( 1395 uxfer->dev_handle, endpoint); 1396 } else { 1397 /* not started */ 1398 retval = LIBUSB_ERROR_NOT_FOUND; 1399 } 1400 1401 CTX_UNLOCK(dev->ctx); 1402 1403 DPRINTF(dev->ctx, LIBUSB_DEBUG_FUNCTION, "libusb_cancel_transfer leave"); 1404 1405 return (retval); 1406} 1407 1408UNEXPORTED void 1409libusb10_cancel_all_transfer(libusb_device *dev) 1410{ 1411 /* TODO */ 1412} 1413 1414uint16_t 1415libusb_cpu_to_le16(uint16_t x) 1416{ 1417 return (htole16(x)); 1418} 1419 1420uint16_t 1421libusb_le16_to_cpu(uint16_t x) 1422{ 1423 return (le16toh(x)); 1424} 1425 1426const char * 1427libusb_strerror(int code) 1428{ 1429 /* TODO */ 1430 return ("Unknown error"); 1431} 1432