3 * Copyright (c) 2008 Hans Petter Selasky. All rights reserved.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
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.
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
32 #include <sys/queue.h>
35 #include "libusb20_desc.h"
36 #include "libusb20_int.h"
41 return (LIBUSB20_ERROR_NOT_SUPPORTED);
51 dummy_callback(struct libusb20_transfer *xfer)
54 switch (libusb20_tr_get_status(xfer)) {
55 case LIBUSB20_TRANSFER_START:
56 libusb20_tr_submit(xfer);
59 /* complete or error */
65 #define dummy_get_config_desc_full (void *)dummy_int
66 #define dummy_get_config_index (void *)dummy_int
67 #define dummy_set_config_index (void *)dummy_int
68 #define dummy_set_alt_index (void *)dummy_int
69 #define dummy_reset_device (void *)dummy_int
70 #define dummy_set_power_mode (void *)dummy_int
71 #define dummy_get_power_mode (void *)dummy_int
72 #define dummy_kernel_driver_active (void *)dummy_int
73 #define dummy_detach_kernel_driver (void *)dummy_int
74 #define dummy_do_request_sync (void *)dummy_int
75 #define dummy_tr_open (void *)dummy_int
76 #define dummy_tr_close (void *)dummy_int
77 #define dummy_tr_clear_stall_sync (void *)dummy_int
78 #define dummy_process (void *)dummy_int
79 #define dummy_dev_info (void *)dummy_int
80 #define dummy_dev_get_iface_driver (void *)dummy_int
82 #define dummy_tr_submit (void *)dummy_void
83 #define dummy_tr_cancel_async (void *)dummy_void
85 static const struct libusb20_device_methods libusb20_dummy_methods = {
86 LIBUSB20_DEVICE(LIBUSB20_DECLARE, dummy)
90 libusb20_tr_callback_wrapper(struct libusb20_transfer *xfer)
96 if (!xfer->is_pending) {
97 xfer->status = LIBUSB20_TRANSFER_START;
102 xfer->callback(xfer);
104 if (xfer->is_restart) {
105 xfer->is_restart = 0;
108 if (xfer->is_draining &&
109 (!xfer->is_pending)) {
110 xfer->is_draining = 0;
111 xfer->status = LIBUSB20_TRANSFER_DRAINED;
112 xfer->callback(xfer);
118 libusb20_tr_close(struct libusb20_transfer *xfer)
122 if (!xfer->is_opened) {
123 return (LIBUSB20_ERROR_OTHER);
125 error = xfer->pdev->methods->tr_close(xfer);
130 if (xfer->ppBuffer) {
131 free(xfer->ppBuffer);
133 /* clear some fields */
136 xfer->maxTotalLength = 0;
137 xfer->maxPacketLen = 0;
142 libusb20_tr_open(struct libusb20_transfer *xfer, uint32_t MaxBufSize,
143 uint32_t MaxFrameCount, uint8_t ep_no)
148 if (xfer->is_opened) {
149 return (LIBUSB20_ERROR_BUSY);
151 if (MaxFrameCount == 0) {
152 return (LIBUSB20_ERROR_INVALID_PARAM);
154 xfer->maxFrames = MaxFrameCount;
156 size = MaxFrameCount * sizeof(xfer->pLength[0]);
157 xfer->pLength = malloc(size);
158 if (xfer->pLength == NULL) {
159 return (LIBUSB20_ERROR_NO_MEM);
161 memset(xfer->pLength, 0, size);
163 size = MaxFrameCount * sizeof(xfer->ppBuffer[0]);
164 xfer->ppBuffer = malloc(size);
165 if (xfer->ppBuffer == NULL) {
167 return (LIBUSB20_ERROR_NO_MEM);
169 memset(xfer->ppBuffer, 0, size);
171 error = xfer->pdev->methods->tr_open(xfer, MaxBufSize,
172 MaxFrameCount, ep_no);
175 free(xfer->ppBuffer);
183 struct libusb20_transfer *
184 libusb20_tr_get_pointer(struct libusb20_device *pdev, uint16_t trIndex)
186 if (trIndex >= pdev->nTransfer) {
189 return (pdev->pTransfer + trIndex);
193 libusb20_tr_get_actual_frames(struct libusb20_transfer *xfer)
195 return (xfer->aFrames);
199 libusb20_tr_get_time_complete(struct libusb20_transfer *xfer)
201 return (xfer->timeComplete);
205 libusb20_tr_get_actual_length(struct libusb20_transfer *xfer)
210 for (x = 0; x != xfer->aFrames; x++) {
211 actlen += xfer->pLength[x];
217 libusb20_tr_get_max_frames(struct libusb20_transfer *xfer)
219 return (xfer->maxFrames);
223 libusb20_tr_get_max_packet_length(struct libusb20_transfer *xfer)
226 * Special Case NOTE: If the packet multiplier is non-zero for
227 * High Speed USB, the value returned is equal to
228 * "wMaxPacketSize * multiplier" !
230 return (xfer->maxPacketLen);
234 libusb20_tr_get_max_total_length(struct libusb20_transfer *xfer)
236 return (xfer->maxTotalLength);
240 libusb20_tr_get_status(struct libusb20_transfer *xfer)
242 return (xfer->status);
246 libusb20_tr_pending(struct libusb20_transfer *xfer)
248 return (xfer->is_pending);
252 libusb20_tr_get_priv_sc0(struct libusb20_transfer *xfer)
254 return (xfer->priv_sc0);
258 libusb20_tr_get_priv_sc1(struct libusb20_transfer *xfer)
260 return (xfer->priv_sc1);
264 libusb20_tr_stop(struct libusb20_transfer *xfer)
266 if (!xfer->is_pending) {
267 /* transfer not pending */
270 if (xfer->is_cancel) {
271 /* already cancelling */
274 xfer->is_cancel = 1; /* we are cancelling */
276 xfer->pdev->methods->tr_cancel_async(xfer);
281 libusb20_tr_drain(struct libusb20_transfer *xfer)
283 /* make sure that we are cancelling */
284 libusb20_tr_stop(xfer);
286 if (xfer->is_pending) {
287 xfer->is_draining = 1;
293 libusb20_tr_clear_stall_sync(struct libusb20_transfer *xfer)
295 xfer->pdev->methods->tr_clear_stall_sync(xfer);
300 libusb20_tr_set_buffer(struct libusb20_transfer *xfer, void *buffer, uint16_t frIndex)
302 xfer->ppBuffer[frIndex] = buffer;
307 libusb20_tr_set_callback(struct libusb20_transfer *xfer, libusb20_tr_callback_t *cb)
314 libusb20_tr_set_flags(struct libusb20_transfer *xfer, uint8_t flags)
321 libusb20_tr_get_length(struct libusb20_transfer *xfer, uint16_t frIndex)
323 return (xfer->pLength[frIndex]);
327 libusb20_tr_set_length(struct libusb20_transfer *xfer, uint32_t length, uint16_t frIndex)
329 xfer->pLength[frIndex] = length;
334 libusb20_tr_set_priv_sc0(struct libusb20_transfer *xfer, void *sc0)
336 xfer->priv_sc0 = sc0;
341 libusb20_tr_set_priv_sc1(struct libusb20_transfer *xfer, void *sc1)
343 xfer->priv_sc1 = sc1;
348 libusb20_tr_set_timeout(struct libusb20_transfer *xfer, uint32_t timeout)
350 xfer->timeout = timeout;
355 libusb20_tr_set_total_frames(struct libusb20_transfer *xfer, uint32_t nFrames)
357 if (nFrames > xfer->maxFrames) {
358 /* should not happen */
359 nFrames = xfer->maxFrames;
361 xfer->nFrames = nFrames;
366 libusb20_tr_setup_bulk(struct libusb20_transfer *xfer, void *pBuf, uint32_t length, uint32_t timeout)
368 xfer->ppBuffer[0] = pBuf;
369 xfer->pLength[0] = length;
370 xfer->timeout = timeout;
376 libusb20_tr_setup_control(struct libusb20_transfer *xfer, void *psetup, void *pBuf, uint32_t timeout)
380 xfer->ppBuffer[0] = psetup;
381 xfer->pLength[0] = 8; /* fixed */
382 xfer->timeout = timeout;
384 len = ((uint8_t *)psetup)[6] | (((uint8_t *)psetup)[7] << 8);
388 xfer->ppBuffer[1] = pBuf;
389 xfer->pLength[1] = len;
397 libusb20_tr_setup_intr(struct libusb20_transfer *xfer, void *pBuf, uint32_t length, uint32_t timeout)
399 xfer->ppBuffer[0] = pBuf;
400 xfer->pLength[0] = length;
401 xfer->timeout = timeout;
407 libusb20_tr_setup_isoc(struct libusb20_transfer *xfer, void *pBuf, uint32_t length, uint16_t frIndex)
409 if (frIndex >= xfer->maxFrames) {
410 /* should not happen */
413 xfer->ppBuffer[frIndex] = pBuf;
414 xfer->pLength[frIndex] = length;
419 libusb20_tr_submit(struct libusb20_transfer *xfer)
421 if (xfer->is_pending) {
422 /* should not happen */
425 xfer->is_pending = 1; /* we are pending */
426 xfer->is_cancel = 0; /* not cancelling */
427 xfer->is_restart = 0; /* not restarting */
429 xfer->pdev->methods->tr_submit(xfer);
434 libusb20_tr_start(struct libusb20_transfer *xfer)
436 if (xfer->is_pending) {
437 if (xfer->is_cancel) {
438 /* cancelling - restart */
439 xfer->is_restart = 1;
441 /* transfer not pending */
444 /* get into the callback */
445 libusb20_tr_callback_wrapper(xfer);
449 /* USB device operations */
452 libusb20_dev_close(struct libusb20_device *pdev)
454 struct libusb20_transfer *xfer;
458 if (!pdev->is_opened) {
459 return (LIBUSB20_ERROR_OTHER);
461 for (x = 0; x != pdev->nTransfer; x++) {
462 xfer = pdev->pTransfer + x;
464 libusb20_tr_drain(xfer);
467 if (pdev->pTransfer != NULL) {
468 free(pdev->pTransfer);
469 pdev->pTransfer = NULL;
471 error = pdev->beMethods->close_device(pdev);
473 pdev->methods = &libusb20_dummy_methods;
478 * The following variable is only used by the libusb v0.1
481 pdev->claimed_interface = 0;
487 libusb20_dev_detach_kernel_driver(struct libusb20_device *pdev, uint8_t ifaceIndex)
491 error = pdev->methods->detach_kernel_driver(pdev, ifaceIndex);
495 struct LIBUSB20_DEVICE_DESC_DECODED *
496 libusb20_dev_get_device_desc(struct libusb20_device *pdev)
498 return (&(pdev->ddesc));
502 libusb20_dev_get_fd(struct libusb20_device *pdev)
508 libusb20_dev_kernel_driver_active(struct libusb20_device *pdev, uint8_t ifaceIndex)
512 error = pdev->methods->kernel_driver_active(pdev, ifaceIndex);
517 libusb20_dev_open(struct libusb20_device *pdev, uint16_t nTransferMax)
519 struct libusb20_transfer *xfer;
524 if (pdev->is_opened) {
525 return (LIBUSB20_ERROR_BUSY);
527 if (nTransferMax >= 256) {
528 return (LIBUSB20_ERROR_INVALID_PARAM);
529 } else if (nTransferMax != 0) {
530 size = sizeof(pdev->pTransfer[0]) * nTransferMax;
531 pdev->pTransfer = malloc(size);
532 if (pdev->pTransfer == NULL) {
533 return (LIBUSB20_ERROR_NO_MEM);
535 memset(pdev->pTransfer, 0, size);
537 /* initialise all transfers */
538 for (x = 0; x != nTransferMax; x++) {
540 xfer = pdev->pTransfer + x;
544 xfer->callback = &dummy_callback;
547 /* set "nTransfer" early */
548 pdev->nTransfer = nTransferMax;
550 error = pdev->beMethods->open_device(pdev, nTransferMax);
553 if (pdev->pTransfer != NULL) {
554 free(pdev->pTransfer);
555 pdev->pTransfer = NULL;
558 pdev->file_ctrl = -1;
567 libusb20_dev_reset(struct libusb20_device *pdev)
571 error = pdev->methods->reset_device(pdev);
576 libusb20_dev_set_power_mode(struct libusb20_device *pdev, uint8_t power_mode)
580 error = pdev->methods->set_power_mode(pdev, power_mode);
585 libusb20_dev_get_power_mode(struct libusb20_device *pdev)
590 error = pdev->methods->get_power_mode(pdev, &power_mode);
592 power_mode = LIBUSB20_POWER_ON; /* fake power mode */
597 libusb20_dev_set_alt_index(struct libusb20_device *pdev, uint8_t ifaceIndex, uint8_t altIndex)
601 error = pdev->methods->set_alt_index(pdev, ifaceIndex, altIndex);
606 libusb20_dev_set_config_index(struct libusb20_device *pdev, uint8_t configIndex)
610 error = pdev->methods->set_config_index(pdev, configIndex);
615 libusb20_dev_request_sync(struct libusb20_device *pdev,
616 struct LIBUSB20_CONTROL_SETUP_DECODED *setup, void *data,
617 uint16_t *pactlen, uint32_t timeout, uint8_t flags)
621 error = pdev->methods->do_request_sync(pdev,
622 setup, data, pactlen, timeout, flags);
627 libusb20_dev_req_string_sync(struct libusb20_device *pdev,
628 uint8_t str_index, uint16_t langid, void *ptr, uint16_t len)
630 struct LIBUSB20_CONTROL_SETUP_DECODED req;
635 return (LIBUSB20_ERROR_INVALID_PARAM);
637 LIBUSB20_INIT(LIBUSB20_CONTROL_SETUP, &req);
640 * We need to read the USB string in two steps else some USB
641 * devices will complain.
644 LIBUSB20_REQUEST_TYPE_STANDARD |
645 LIBUSB20_RECIPIENT_DEVICE |
646 LIBUSB20_ENDPOINT_IN;
647 req.bRequest = LIBUSB20_REQUEST_GET_DESCRIPTOR;
648 req.wValue = (LIBUSB20_DT_STRING << 8) | str_index;
650 req.wLength = 4; /* bytes */
652 error = libusb20_dev_request_sync(pdev, &req,
653 ptr, NULL, 1000, LIBUSB20_TRANSFER_SINGLE_SHORT_NOT_OK);
657 req.wLength = *(uint8_t *)ptr; /* bytes */
658 if (req.wLength > len) {
659 /* partial string read */
662 error = libusb20_dev_request_sync(pdev, &req,
663 ptr, NULL, 1000, LIBUSB20_TRANSFER_SINGLE_SHORT_NOT_OK);
668 if (((uint8_t *)ptr)[1] != LIBUSB20_DT_STRING) {
669 return (LIBUSB20_ERROR_OTHER);
671 return (0); /* success */
675 libusb20_dev_req_string_simple_sync(struct libusb20_device *pdev,
676 uint8_t str_index, void *ptr, uint16_t len)
687 /* the following code derives from the FreeBSD USB kernel */
689 if ((len < 1) || (ptr == NULL)) {
690 /* too short buffer */
691 return (LIBUSB20_ERROR_INVALID_PARAM);
693 error = libusb20_dev_req_string_sync(pdev,
694 0, 0, temp, sizeof(temp));
696 *(uint8_t *)ptr = 0; /* zero terminate */
699 langid = temp[2] | (temp[3] << 8);
701 error = libusb20_dev_req_string_sync(pdev, str_index,
702 langid, temp, sizeof(temp));
704 *(uint8_t *)ptr = 0; /* zero terminate */
708 /* string length is too short */
709 *(uint8_t *)ptr = 0; /* zero terminate */
710 return (LIBUSB20_ERROR_OTHER);
712 /* reserve one byte for terminating zero */
715 /* find maximum length */
716 n = (temp[0] / 2) - 1;
720 /* reset swap state */
723 /* setup output buffer pointer */
726 /* convert and filter */
727 for (i = 0; (i != n); i++) {
728 c = temp[(2 * i) + 2] | (temp[(2 * i) + 3] << 8);
730 /* convert from Unicode, handle buggy strings */
731 if (((c & 0xff00) == 0) && (swap & 1)) {
732 /* Little Endian, default */
735 } else if (((c & 0x00ff) == 0) && (swap & 2)) {
740 /* skip invalid character */
744 * Filter by default - we don't allow greater and less than
745 * signs because they might confuse the dmesg printouts!
747 if ((*buf == '<') || (*buf == '>') || (!isprint(*buf))) {
748 /* skip invalid character */
753 *buf = 0; /* zero terminate string */
758 struct libusb20_config *
759 libusb20_dev_alloc_config(struct libusb20_device *pdev, uint8_t configIndex)
761 struct libusb20_config *retval = NULL;
767 if (!pdev->is_opened) {
768 error = libusb20_dev_open(pdev, 0);
776 error = pdev->methods->get_config_desc_full(pdev,
777 &ptr, &len, configIndex);
782 /* parse new config descriptor */
783 retval = libusb20_parse_config_desc(ptr);
785 /* free config descriptor */
790 error = libusb20_dev_close(pdev);
795 struct libusb20_device *
796 libusb20_dev_alloc(void)
798 struct libusb20_device *pdev;
800 pdev = malloc(sizeof(*pdev));
804 memset(pdev, 0, sizeof(*pdev));
807 pdev->file_ctrl = -1;
808 pdev->methods = &libusb20_dummy_methods;
813 libusb20_dev_get_config_index(struct libusb20_device *pdev)
819 if (!pdev->is_opened) {
820 error = libusb20_dev_open(pdev, 0);
830 error = pdev->methods->get_config_index(pdev, &cfg_index);
832 cfg_index = 0 - 1; /* current config index */
835 if (libusb20_dev_close(pdev)) {
843 libusb20_dev_get_mode(struct libusb20_device *pdev)
845 return (pdev->usb_mode);
849 libusb20_dev_get_speed(struct libusb20_device *pdev)
851 return (pdev->usb_speed);
854 /* if this function returns an error, the device is gone */
856 libusb20_dev_process(struct libusb20_device *pdev)
860 error = pdev->methods->process(pdev);
865 libusb20_dev_wait_process(struct libusb20_device *pdev, int timeout)
867 struct pollfd pfd[1];
869 if (!pdev->is_opened) {
872 pfd[0].fd = pdev->file;
873 pfd[0].events = (POLLIN | POLLOUT | POLLRDNORM | POLLWRNORM);
876 if (poll(pfd, 1, timeout)) {
877 /* ignore any error */
883 libusb20_dev_free(struct libusb20_device *pdev)
889 if (pdev->is_opened) {
890 if (libusb20_dev_close(pdev)) {
891 /* ignore any errors */
899 libusb20_dev_get_info(struct libusb20_device *pdev,
900 struct usb_device_info *pinfo)
903 return (LIBUSB20_ERROR_INVALID_PARAM);
905 return (pdev->beMethods->dev_get_info(pdev, pinfo));
909 libusb20_dev_get_backend_name(struct libusb20_device *pdev)
911 return (pdev->beMethods->get_backend_name());
915 libusb20_dev_get_desc(struct libusb20_device *pdev)
917 return (pdev->usb_desc);
921 libusb20_dev_set_debug(struct libusb20_device *pdev, int debug)
928 libusb20_dev_get_debug(struct libusb20_device *pdev)
930 return (pdev->debug);
934 libusb20_dev_get_address(struct libusb20_device *pdev)
936 return (pdev->device_address);
940 libusb20_dev_get_bus_number(struct libusb20_device *pdev)
942 return (pdev->bus_number);
946 libusb20_dev_get_iface_desc(struct libusb20_device *pdev,
947 uint8_t iface_index, char *buf, uint8_t len)
949 if ((buf == NULL) || (len == 0))
950 return (LIBUSB20_ERROR_INVALID_PARAM);
952 return (pdev->beMethods->dev_get_iface_desc(
953 pdev, iface_index, buf, len));
956 /* USB backend operations */
959 libusb20_be_get_dev_quirk(struct libusb20_backend *pbe,
960 uint16_t quirk_index, struct libusb20_quirk *pq)
962 return (pbe->methods->root_get_dev_quirk(pbe, quirk_index, pq));
966 libusb20_be_get_quirk_name(struct libusb20_backend *pbe,
967 uint16_t quirk_index, struct libusb20_quirk *pq)
969 return (pbe->methods->root_get_quirk_name(pbe, quirk_index, pq));
973 libusb20_be_add_dev_quirk(struct libusb20_backend *pbe,
974 struct libusb20_quirk *pq)
976 return (pbe->methods->root_add_dev_quirk(pbe, pq));
980 libusb20_be_remove_dev_quirk(struct libusb20_backend *pbe,
981 struct libusb20_quirk *pq)
983 return (pbe->methods->root_remove_dev_quirk(pbe, pq));
987 libusb20_be_set_template(struct libusb20_backend *pbe, int temp)
989 return (pbe->methods->root_set_template(pbe, temp));
993 libusb20_be_get_template(struct libusb20_backend *pbe, int *ptemp)
1000 return (pbe->methods->root_get_template(pbe, ptemp));
1003 struct libusb20_device *
1004 libusb20_be_device_foreach(struct libusb20_backend *pbe, struct libusb20_device *pdev)
1008 } else if (pdev == NULL) {
1009 pdev = TAILQ_FIRST(&(pbe->usb_devs));
1011 pdev = TAILQ_NEXT(pdev, dev_entry);
1016 struct libusb20_backend *
1017 libusb20_be_alloc(const struct libusb20_backend_methods *methods)
1019 struct libusb20_backend *pbe;
1021 pbe = malloc(sizeof(*pbe));
1025 memset(pbe, 0, sizeof(*pbe));
1027 TAILQ_INIT(&(pbe->usb_devs));
1029 pbe->methods = methods; /* set backend methods */
1031 /* do the initial device scan */
1032 if (pbe->methods->init_backend) {
1033 pbe->methods->init_backend(pbe);
1038 struct libusb20_backend *
1039 libusb20_be_alloc_linux(void)
1041 struct libusb20_backend *pbe;
1044 pbe = libusb20_be_alloc(&libusb20_linux_backend);
1051 struct libusb20_backend *
1052 libusb20_be_alloc_ugen20(void)
1054 struct libusb20_backend *pbe;
1057 pbe = libusb20_be_alloc(&libusb20_ugen20_backend);
1064 struct libusb20_backend *
1065 libusb20_be_alloc_default(void)
1067 struct libusb20_backend *pbe;
1069 pbe = libusb20_be_alloc_linux();
1073 pbe = libusb20_be_alloc_ugen20();
1077 return (NULL); /* no backend found */
1081 libusb20_be_free(struct libusb20_backend *pbe)
1083 struct libusb20_device *pdev;
1089 while ((pdev = libusb20_be_device_foreach(pbe, NULL))) {
1090 libusb20_be_dequeue_device(pbe, pdev);
1091 libusb20_dev_free(pdev);
1093 if (pbe->methods->exit_backend) {
1094 pbe->methods->exit_backend(pbe);
1100 libusb20_be_enqueue_device(struct libusb20_backend *pbe, struct libusb20_device *pdev)
1102 pdev->beMethods = pbe->methods; /* copy backend methods */
1103 TAILQ_INSERT_TAIL(&(pbe->usb_devs), pdev, dev_entry);
1108 libusb20_be_dequeue_device(struct libusb20_backend *pbe,
1109 struct libusb20_device *pdev)
1111 TAILQ_REMOVE(&(pbe->usb_devs), pdev, dev_entry);