3 * Copyright (c) 2008-2009 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 /* reset variable fields in case the transfer is opened again */
137 xfer->is_pending = 0;
139 xfer->is_draining = 0;
140 xfer->is_restart = 0;
147 xfer->maxTotalLength = 0;
148 xfer->maxPacketLen = 0;
153 libusb20_tr_open(struct libusb20_transfer *xfer, uint32_t MaxBufSize,
154 uint32_t MaxFrameCount, uint8_t ep_no)
159 if (xfer->is_opened) {
160 return (LIBUSB20_ERROR_BUSY);
162 if (MaxFrameCount == 0) {
163 return (LIBUSB20_ERROR_INVALID_PARAM);
165 xfer->maxFrames = MaxFrameCount;
167 size = MaxFrameCount * sizeof(xfer->pLength[0]);
168 xfer->pLength = malloc(size);
169 if (xfer->pLength == NULL) {
170 return (LIBUSB20_ERROR_NO_MEM);
172 memset(xfer->pLength, 0, size);
174 size = MaxFrameCount * sizeof(xfer->ppBuffer[0]);
175 xfer->ppBuffer = malloc(size);
176 if (xfer->ppBuffer == NULL) {
178 return (LIBUSB20_ERROR_NO_MEM);
180 memset(xfer->ppBuffer, 0, size);
182 error = xfer->pdev->methods->tr_open(xfer, MaxBufSize,
183 MaxFrameCount, ep_no);
186 free(xfer->ppBuffer);
194 struct libusb20_transfer *
195 libusb20_tr_get_pointer(struct libusb20_device *pdev, uint16_t trIndex)
197 if (trIndex >= pdev->nTransfer) {
200 return (pdev->pTransfer + trIndex);
204 libusb20_tr_get_actual_frames(struct libusb20_transfer *xfer)
206 return (xfer->aFrames);
210 libusb20_tr_get_time_complete(struct libusb20_transfer *xfer)
212 return (xfer->timeComplete);
216 libusb20_tr_get_actual_length(struct libusb20_transfer *xfer)
221 for (x = 0; x != xfer->aFrames; x++) {
222 actlen += xfer->pLength[x];
228 libusb20_tr_get_max_frames(struct libusb20_transfer *xfer)
230 return (xfer->maxFrames);
234 libusb20_tr_get_max_packet_length(struct libusb20_transfer *xfer)
237 * Special Case NOTE: If the packet multiplier is non-zero for
238 * High Speed USB, the value returned is equal to
239 * "wMaxPacketSize * multiplier" !
241 return (xfer->maxPacketLen);
245 libusb20_tr_get_max_total_length(struct libusb20_transfer *xfer)
247 return (xfer->maxTotalLength);
251 libusb20_tr_get_status(struct libusb20_transfer *xfer)
253 return (xfer->status);
257 libusb20_tr_pending(struct libusb20_transfer *xfer)
259 return (xfer->is_pending);
263 libusb20_tr_get_priv_sc0(struct libusb20_transfer *xfer)
265 return (xfer->priv_sc0);
269 libusb20_tr_get_priv_sc1(struct libusb20_transfer *xfer)
271 return (xfer->priv_sc1);
275 libusb20_tr_stop(struct libusb20_transfer *xfer)
277 if (!xfer->is_opened) {
278 /* transfer is not opened */
281 if (!xfer->is_pending) {
282 /* transfer not pending */
285 if (xfer->is_cancel) {
286 /* already cancelling */
289 xfer->is_cancel = 1; /* we are cancelling */
291 xfer->pdev->methods->tr_cancel_async(xfer);
296 libusb20_tr_drain(struct libusb20_transfer *xfer)
298 if (!xfer->is_opened) {
299 /* transfer is not opened */
302 /* make sure that we are cancelling */
303 libusb20_tr_stop(xfer);
305 if (xfer->is_pending) {
306 xfer->is_draining = 1;
312 libusb20_tr_clear_stall_sync(struct libusb20_transfer *xfer)
314 xfer->pdev->methods->tr_clear_stall_sync(xfer);
319 libusb20_tr_set_buffer(struct libusb20_transfer *xfer, void *buffer, uint16_t frIndex)
321 xfer->ppBuffer[frIndex] = buffer;
326 libusb20_tr_set_callback(struct libusb20_transfer *xfer, libusb20_tr_callback_t *cb)
333 libusb20_tr_set_flags(struct libusb20_transfer *xfer, uint8_t flags)
340 libusb20_tr_get_length(struct libusb20_transfer *xfer, uint16_t frIndex)
342 return (xfer->pLength[frIndex]);
346 libusb20_tr_set_length(struct libusb20_transfer *xfer, uint32_t length, uint16_t frIndex)
348 xfer->pLength[frIndex] = length;
353 libusb20_tr_set_priv_sc0(struct libusb20_transfer *xfer, void *sc0)
355 xfer->priv_sc0 = sc0;
360 libusb20_tr_set_priv_sc1(struct libusb20_transfer *xfer, void *sc1)
362 xfer->priv_sc1 = sc1;
367 libusb20_tr_set_timeout(struct libusb20_transfer *xfer, uint32_t timeout)
369 xfer->timeout = timeout;
374 libusb20_tr_set_total_frames(struct libusb20_transfer *xfer, uint32_t nFrames)
376 if (nFrames > xfer->maxFrames) {
377 /* should not happen */
378 nFrames = xfer->maxFrames;
380 xfer->nFrames = nFrames;
385 libusb20_tr_setup_bulk(struct libusb20_transfer *xfer, void *pBuf, uint32_t length, uint32_t timeout)
387 xfer->ppBuffer[0] = pBuf;
388 xfer->pLength[0] = length;
389 xfer->timeout = timeout;
395 libusb20_tr_setup_control(struct libusb20_transfer *xfer, void *psetup, void *pBuf, uint32_t timeout)
399 xfer->ppBuffer[0] = psetup;
400 xfer->pLength[0] = 8; /* fixed */
401 xfer->timeout = timeout;
403 len = ((uint8_t *)psetup)[6] | (((uint8_t *)psetup)[7] << 8);
407 xfer->ppBuffer[1] = pBuf;
408 xfer->pLength[1] = len;
416 libusb20_tr_setup_intr(struct libusb20_transfer *xfer, void *pBuf, uint32_t length, uint32_t timeout)
418 xfer->ppBuffer[0] = pBuf;
419 xfer->pLength[0] = length;
420 xfer->timeout = timeout;
426 libusb20_tr_setup_isoc(struct libusb20_transfer *xfer, void *pBuf, uint32_t length, uint16_t frIndex)
428 if (frIndex >= xfer->maxFrames) {
429 /* should not happen */
432 xfer->ppBuffer[frIndex] = pBuf;
433 xfer->pLength[frIndex] = length;
438 libusb20_tr_bulk_intr_sync(struct libusb20_transfer *xfer,
439 void *pbuf, uint32_t length, uint32_t *pactlen,
442 struct libusb20_device *pdev = xfer->pdev;
443 uint32_t transfer_max;
444 uint32_t transfer_act;
447 /* set some sensible default value */
451 /* check for error condition */
452 if (libusb20_tr_pending(xfer))
453 return (LIBUSB20_ERROR_OTHER);
456 /* compute maximum transfer length */
458 libusb20_tr_get_max_total_length(xfer);
460 if (transfer_max > length)
461 transfer_max = length;
463 /* setup bulk or interrupt transfer */
464 libusb20_tr_setup_bulk(xfer, pbuf,
465 transfer_max, timeout);
467 /* start the transfer */
468 libusb20_tr_start(xfer);
470 /* wait for transfer completion */
471 while (libusb20_dev_process(pdev) == 0) {
473 if (libusb20_tr_pending(xfer) == 0)
476 libusb20_dev_wait_process(pdev, -1);
479 transfer_act = libusb20_tr_get_actual_length(xfer);
481 /* update actual length, if any */
483 pactlen[0] += transfer_act;
485 /* check transfer status */
486 retval = libusb20_tr_get_status(xfer);
490 /* check for short transfer */
491 if (transfer_act != transfer_max)
494 /* update buffer pointer and length */
495 pbuf = ((uint8_t *)pbuf) + transfer_max;
496 length = length - transfer_max;
498 } while (length != 0);
504 libusb20_tr_submit(struct libusb20_transfer *xfer)
506 if (!xfer->is_opened) {
507 /* transfer is not opened */
510 if (xfer->is_pending) {
511 /* should not happen */
514 xfer->is_pending = 1; /* we are pending */
515 xfer->is_cancel = 0; /* not cancelling */
516 xfer->is_restart = 0; /* not restarting */
518 xfer->pdev->methods->tr_submit(xfer);
523 libusb20_tr_start(struct libusb20_transfer *xfer)
525 if (!xfer->is_opened) {
526 /* transfer is not opened */
529 if (xfer->is_pending) {
530 if (xfer->is_cancel) {
531 /* cancelling - restart */
532 xfer->is_restart = 1;
534 /* transfer not pending */
537 /* get into the callback */
538 libusb20_tr_callback_wrapper(xfer);
542 /* USB device operations */
545 libusb20_dev_close(struct libusb20_device *pdev)
547 struct libusb20_transfer *xfer;
551 if (!pdev->is_opened) {
552 return (LIBUSB20_ERROR_OTHER);
554 for (x = 0; x != pdev->nTransfer; x++) {
555 xfer = pdev->pTransfer + x;
557 if (!xfer->is_opened) {
558 /* transfer is not opened */
562 libusb20_tr_drain(xfer);
564 libusb20_tr_close(xfer);
567 if (pdev->pTransfer != NULL) {
568 free(pdev->pTransfer);
569 pdev->pTransfer = NULL;
571 error = pdev->beMethods->close_device(pdev);
573 pdev->methods = &libusb20_dummy_methods;
578 * The following variable is only used by the libusb v0.1
581 pdev->claimed_interface = 0;
587 libusb20_dev_detach_kernel_driver(struct libusb20_device *pdev, uint8_t ifaceIndex)
591 error = pdev->methods->detach_kernel_driver(pdev, ifaceIndex);
595 struct LIBUSB20_DEVICE_DESC_DECODED *
596 libusb20_dev_get_device_desc(struct libusb20_device *pdev)
598 return (&(pdev->ddesc));
602 libusb20_dev_get_fd(struct libusb20_device *pdev)
608 libusb20_dev_kernel_driver_active(struct libusb20_device *pdev, uint8_t ifaceIndex)
612 error = pdev->methods->kernel_driver_active(pdev, ifaceIndex);
617 libusb20_dev_open(struct libusb20_device *pdev, uint16_t nTransferMax)
619 struct libusb20_transfer *xfer;
624 if (pdev->is_opened) {
625 return (LIBUSB20_ERROR_BUSY);
627 if (nTransferMax >= 256) {
628 return (LIBUSB20_ERROR_INVALID_PARAM);
629 } else if (nTransferMax != 0) {
630 size = sizeof(pdev->pTransfer[0]) * nTransferMax;
631 pdev->pTransfer = malloc(size);
632 if (pdev->pTransfer == NULL) {
633 return (LIBUSB20_ERROR_NO_MEM);
635 memset(pdev->pTransfer, 0, size);
637 /* initialise all transfers */
638 for (x = 0; x != nTransferMax; x++) {
640 xfer = pdev->pTransfer + x;
644 xfer->callback = &dummy_callback;
647 /* set "nTransfer" early */
648 pdev->nTransfer = nTransferMax;
650 error = pdev->beMethods->open_device(pdev, nTransferMax);
653 if (pdev->pTransfer != NULL) {
654 free(pdev->pTransfer);
655 pdev->pTransfer = NULL;
658 pdev->file_ctrl = -1;
667 libusb20_dev_reset(struct libusb20_device *pdev)
671 error = pdev->methods->reset_device(pdev);
676 libusb20_dev_set_power_mode(struct libusb20_device *pdev, uint8_t power_mode)
680 error = pdev->methods->set_power_mode(pdev, power_mode);
685 libusb20_dev_get_power_mode(struct libusb20_device *pdev)
690 error = pdev->methods->get_power_mode(pdev, &power_mode);
692 power_mode = LIBUSB20_POWER_ON; /* fake power mode */
697 libusb20_dev_set_alt_index(struct libusb20_device *pdev, uint8_t ifaceIndex, uint8_t altIndex)
701 error = pdev->methods->set_alt_index(pdev, ifaceIndex, altIndex);
706 libusb20_dev_set_config_index(struct libusb20_device *pdev, uint8_t configIndex)
710 error = pdev->methods->set_config_index(pdev, configIndex);
715 libusb20_dev_request_sync(struct libusb20_device *pdev,
716 struct LIBUSB20_CONTROL_SETUP_DECODED *setup, void *data,
717 uint16_t *pactlen, uint32_t timeout, uint8_t flags)
721 error = pdev->methods->do_request_sync(pdev,
722 setup, data, pactlen, timeout, flags);
727 libusb20_dev_req_string_sync(struct libusb20_device *pdev,
728 uint8_t str_index, uint16_t langid, void *ptr, uint16_t len)
730 struct LIBUSB20_CONTROL_SETUP_DECODED req;
733 /* make sure memory is initialised */
738 return (LIBUSB20_ERROR_INVALID_PARAM);
740 LIBUSB20_INIT(LIBUSB20_CONTROL_SETUP, &req);
743 * We need to read the USB string in two steps else some USB
744 * devices will complain.
747 LIBUSB20_REQUEST_TYPE_STANDARD |
748 LIBUSB20_RECIPIENT_DEVICE |
749 LIBUSB20_ENDPOINT_IN;
750 req.bRequest = LIBUSB20_REQUEST_GET_DESCRIPTOR;
751 req.wValue = (LIBUSB20_DT_STRING << 8) | str_index;
753 req.wLength = 4; /* bytes */
755 error = libusb20_dev_request_sync(pdev, &req,
756 ptr, NULL, 1000, LIBUSB20_TRANSFER_SINGLE_SHORT_NOT_OK);
760 req.wLength = *(uint8_t *)ptr; /* bytes */
761 if (req.wLength > len) {
762 /* partial string read */
765 error = libusb20_dev_request_sync(pdev, &req,
766 ptr, NULL, 1000, LIBUSB20_TRANSFER_SINGLE_SHORT_NOT_OK);
771 if (((uint8_t *)ptr)[1] != LIBUSB20_DT_STRING) {
772 return (LIBUSB20_ERROR_OTHER);
774 return (0); /* success */
778 libusb20_dev_req_string_simple_sync(struct libusb20_device *pdev,
779 uint8_t str_index, void *ptr, uint16_t len)
790 /* the following code derives from the FreeBSD USB kernel */
792 if ((len < 1) || (ptr == NULL)) {
793 /* too short buffer */
794 return (LIBUSB20_ERROR_INVALID_PARAM);
796 error = libusb20_dev_req_string_sync(pdev,
797 0, 0, temp, sizeof(temp));
799 *(uint8_t *)ptr = 0; /* zero terminate */
802 langid = temp[2] | (temp[3] << 8);
804 error = libusb20_dev_req_string_sync(pdev, str_index,
805 langid, temp, sizeof(temp));
807 *(uint8_t *)ptr = 0; /* zero terminate */
811 /* string length is too short */
812 *(uint8_t *)ptr = 0; /* zero terminate */
813 return (LIBUSB20_ERROR_OTHER);
815 /* reserve one byte for terminating zero */
818 /* find maximum length */
819 n = (temp[0] / 2) - 1;
823 /* reset swap state */
826 /* setup output buffer pointer */
829 /* convert and filter */
830 for (i = 0; (i != n); i++) {
831 c = temp[(2 * i) + 2] | (temp[(2 * i) + 3] << 8);
833 /* convert from Unicode, handle buggy strings */
834 if (((c & 0xff00) == 0) && (swap & 1)) {
835 /* Little Endian, default */
838 } else if (((c & 0x00ff) == 0) && (swap & 2)) {
843 /* skip invalid character */
847 * Filter by default - we don't allow greater and less than
848 * signs because they might confuse the dmesg printouts!
850 if ((*buf == '<') || (*buf == '>') || (!isprint(*buf))) {
851 /* skip invalid character */
856 *buf = 0; /* zero terminate string */
861 struct libusb20_config *
862 libusb20_dev_alloc_config(struct libusb20_device *pdev, uint8_t configIndex)
864 struct libusb20_config *retval = NULL;
870 if (!pdev->is_opened) {
871 error = libusb20_dev_open(pdev, 0);
879 error = pdev->methods->get_config_desc_full(pdev,
880 &ptr, &len, configIndex);
885 /* parse new config descriptor */
886 retval = libusb20_parse_config_desc(ptr);
888 /* free config descriptor */
893 error = libusb20_dev_close(pdev);
898 struct libusb20_device *
899 libusb20_dev_alloc(void)
901 struct libusb20_device *pdev;
903 pdev = malloc(sizeof(*pdev));
907 memset(pdev, 0, sizeof(*pdev));
910 pdev->file_ctrl = -1;
911 pdev->methods = &libusb20_dummy_methods;
916 libusb20_dev_get_config_index(struct libusb20_device *pdev)
922 if (!pdev->is_opened) {
923 error = libusb20_dev_open(pdev, 0);
933 error = pdev->methods->get_config_index(pdev, &cfg_index);
935 cfg_index = 0 - 1; /* current config index */
938 if (libusb20_dev_close(pdev)) {
946 libusb20_dev_get_mode(struct libusb20_device *pdev)
948 return (pdev->usb_mode);
952 libusb20_dev_get_speed(struct libusb20_device *pdev)
954 return (pdev->usb_speed);
957 /* if this function returns an error, the device is gone */
959 libusb20_dev_process(struct libusb20_device *pdev)
963 error = pdev->methods->process(pdev);
968 libusb20_dev_wait_process(struct libusb20_device *pdev, int timeout)
970 struct pollfd pfd[1];
972 if (!pdev->is_opened) {
975 pfd[0].fd = pdev->file;
976 pfd[0].events = (POLLIN | POLLOUT | POLLRDNORM | POLLWRNORM);
979 if (poll(pfd, 1, timeout)) {
980 /* ignore any error */
986 libusb20_dev_free(struct libusb20_device *pdev)
992 if (pdev->is_opened) {
993 if (libusb20_dev_close(pdev)) {
994 /* ignore any errors */
1002 libusb20_dev_get_info(struct libusb20_device *pdev,
1003 struct usb_device_info *pinfo)
1006 return (LIBUSB20_ERROR_INVALID_PARAM);
1008 return (pdev->beMethods->dev_get_info(pdev, pinfo));
1012 libusb20_dev_get_backend_name(struct libusb20_device *pdev)
1014 return (pdev->beMethods->get_backend_name());
1018 libusb20_dev_get_desc(struct libusb20_device *pdev)
1020 return (pdev->usb_desc);
1024 libusb20_dev_set_debug(struct libusb20_device *pdev, int debug)
1026 pdev->debug = debug;
1031 libusb20_dev_get_debug(struct libusb20_device *pdev)
1033 return (pdev->debug);
1037 libusb20_dev_get_address(struct libusb20_device *pdev)
1039 return (pdev->device_address);
1043 libusb20_dev_get_bus_number(struct libusb20_device *pdev)
1045 return (pdev->bus_number);
1049 libusb20_dev_get_iface_desc(struct libusb20_device *pdev,
1050 uint8_t iface_index, char *buf, uint8_t len)
1052 if ((buf == NULL) || (len == 0))
1053 return (LIBUSB20_ERROR_INVALID_PARAM);
1055 return (pdev->beMethods->dev_get_iface_desc(
1056 pdev, iface_index, buf, len));
1059 /* USB backend operations */
1062 libusb20_be_get_dev_quirk(struct libusb20_backend *pbe,
1063 uint16_t quirk_index, struct libusb20_quirk *pq)
1065 return (pbe->methods->root_get_dev_quirk(pbe, quirk_index, pq));
1069 libusb20_be_get_quirk_name(struct libusb20_backend *pbe,
1070 uint16_t quirk_index, struct libusb20_quirk *pq)
1072 return (pbe->methods->root_get_quirk_name(pbe, quirk_index, pq));
1076 libusb20_be_add_dev_quirk(struct libusb20_backend *pbe,
1077 struct libusb20_quirk *pq)
1079 return (pbe->methods->root_add_dev_quirk(pbe, pq));
1083 libusb20_be_remove_dev_quirk(struct libusb20_backend *pbe,
1084 struct libusb20_quirk *pq)
1086 return (pbe->methods->root_remove_dev_quirk(pbe, pq));
1090 libusb20_be_set_template(struct libusb20_backend *pbe, int temp)
1092 return (pbe->methods->root_set_template(pbe, temp));
1096 libusb20_be_get_template(struct libusb20_backend *pbe, int *ptemp)
1103 return (pbe->methods->root_get_template(pbe, ptemp));
1106 struct libusb20_device *
1107 libusb20_be_device_foreach(struct libusb20_backend *pbe, struct libusb20_device *pdev)
1111 } else if (pdev == NULL) {
1112 pdev = TAILQ_FIRST(&(pbe->usb_devs));
1114 pdev = TAILQ_NEXT(pdev, dev_entry);
1119 struct libusb20_backend *
1120 libusb20_be_alloc(const struct libusb20_backend_methods *methods)
1122 struct libusb20_backend *pbe;
1124 pbe = malloc(sizeof(*pbe));
1128 memset(pbe, 0, sizeof(*pbe));
1130 TAILQ_INIT(&(pbe->usb_devs));
1132 pbe->methods = methods; /* set backend methods */
1134 /* do the initial device scan */
1135 if (pbe->methods->init_backend) {
1136 pbe->methods->init_backend(pbe);
1141 struct libusb20_backend *
1142 libusb20_be_alloc_linux(void)
1144 struct libusb20_backend *pbe;
1147 pbe = libusb20_be_alloc(&libusb20_linux_backend);
1154 struct libusb20_backend *
1155 libusb20_be_alloc_ugen20(void)
1157 struct libusb20_backend *pbe;
1160 pbe = libusb20_be_alloc(&libusb20_ugen20_backend);
1167 struct libusb20_backend *
1168 libusb20_be_alloc_default(void)
1170 struct libusb20_backend *pbe;
1172 pbe = libusb20_be_alloc_linux();
1176 pbe = libusb20_be_alloc_ugen20();
1180 return (NULL); /* no backend found */
1184 libusb20_be_free(struct libusb20_backend *pbe)
1186 struct libusb20_device *pdev;
1192 while ((pdev = libusb20_be_device_foreach(pbe, NULL))) {
1193 libusb20_be_dequeue_device(pbe, pdev);
1194 libusb20_dev_free(pdev);
1196 if (pbe->methods->exit_backend) {
1197 pbe->methods->exit_backend(pbe);
1204 libusb20_be_enqueue_device(struct libusb20_backend *pbe, struct libusb20_device *pdev)
1206 pdev->beMethods = pbe->methods; /* copy backend methods */
1207 TAILQ_INSERT_TAIL(&(pbe->usb_devs), pdev, dev_entry);
1211 libusb20_be_dequeue_device(struct libusb20_backend *pbe,
1212 struct libusb20_device *pdev)
1214 TAILQ_REMOVE(&(pbe->usb_devs), pdev, dev_entry);