1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause
3 *
4 * Copyright (c) 2008-2009 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 #ifdef LIBUSB_GLOBAL_INCLUDE_FILE
29 #include LIBUSB_GLOBAL_INCLUDE_FILE
30 #else
31 #include <ctype.h>
32 #include <poll.h>
33 #include <stdio.h>
34 #include <stdlib.h>
35 #include <string.h>
36 #include <time.h>
37 #include <sys/queue.h>
38 #endif
39
40 #include "libusb20.h"
41 #include "libusb20_desc.h"
42 #include "libusb20_int.h"
43
44 static int
dummy_int(void)45 dummy_int(void)
46 {
47 return (LIBUSB20_ERROR_NOT_SUPPORTED);
48 }
49
50 static void
dummy_void(void)51 dummy_void(void)
52 {
53 return;
54 }
55
56 static void
dummy_callback(struct libusb20_transfer * xfer)57 dummy_callback(struct libusb20_transfer *xfer)
58 {
59 ; /* style fix */
60 switch (libusb20_tr_get_status(xfer)) {
61 case LIBUSB20_TRANSFER_START:
62 libusb20_tr_submit(xfer);
63 break;
64 default:
65 /* complete or error */
66 break;
67 }
68 return;
69 }
70
71 #define dummy_get_config_desc_full (void *)dummy_int
72 #define dummy_get_config_index (void *)dummy_int
73 #define dummy_set_config_index (void *)dummy_int
74 #define dummy_set_alt_index (void *)dummy_int
75 #define dummy_reset_device (void *)dummy_int
76 #define dummy_check_connected (void *)dummy_int
77 #define dummy_set_power_mode (void *)dummy_int
78 #define dummy_get_power_mode (void *)dummy_int
79 #define dummy_get_power_usage (void *)dummy_int
80 #define dummy_get_stats (void *)dummy_int
81 #define dummy_kernel_driver_active (void *)dummy_int
82 #define dummy_detach_kernel_driver (void *)dummy_int
83 #define dummy_do_request_sync (void *)dummy_int
84 #define dummy_tr_open (void *)dummy_int
85 #define dummy_tr_close (void *)dummy_int
86 #define dummy_tr_clear_stall_sync (void *)dummy_int
87 #define dummy_process (void *)dummy_int
88 #define dummy_dev_info (void *)dummy_int
89 #define dummy_dev_get_iface_driver (void *)dummy_int
90
91 #define dummy_tr_submit (void *)dummy_void
92 #define dummy_tr_cancel_async (void *)dummy_void
93
94 static const struct libusb20_device_methods libusb20_dummy_methods = {
95 LIBUSB20_DEVICE(LIBUSB20_DECLARE, dummy)
96 };
97
98 void
libusb20_tr_callback_wrapper(struct libusb20_transfer * xfer)99 libusb20_tr_callback_wrapper(struct libusb20_transfer *xfer)
100 {
101 ; /* style fix */
102
103 repeat:
104
105 if (!xfer->is_pending) {
106 xfer->status = LIBUSB20_TRANSFER_START;
107 } else {
108 xfer->is_pending = 0;
109 }
110
111 xfer->callback(xfer);
112
113 if (xfer->is_restart) {
114 xfer->is_restart = 0;
115 goto repeat;
116 }
117 if (xfer->is_draining &&
118 (!xfer->is_pending)) {
119 xfer->is_draining = 0;
120 xfer->status = LIBUSB20_TRANSFER_DRAINED;
121 xfer->callback(xfer);
122 }
123 return;
124 }
125
126 int
libusb20_tr_close(struct libusb20_transfer * xfer)127 libusb20_tr_close(struct libusb20_transfer *xfer)
128 {
129 int error;
130
131 if (!xfer->is_opened) {
132 return (LIBUSB20_ERROR_OTHER);
133 }
134 error = xfer->pdev->methods->tr_close(xfer);
135
136 if (xfer->pLength) {
137 free(xfer->pLength);
138 }
139 if (xfer->ppBuffer) {
140 free(xfer->ppBuffer);
141 }
142 /* reset variable fields in case the transfer is opened again */
143 xfer->priv_sc0 = NULL;
144 xfer->priv_sc1 = NULL;
145 xfer->is_opened = 0;
146 xfer->is_pending = 0;
147 xfer->is_cancel = 0;
148 xfer->is_draining = 0;
149 xfer->is_restart = 0;
150 xfer->status = 0;
151 xfer->flags = 0;
152 xfer->nFrames = 0;
153 xfer->aFrames = 0;
154 xfer->timeout = 0;
155 xfer->maxFrames = 0;
156 xfer->maxTotalLength = 0;
157 xfer->maxPacketLen = 0;
158 return (error);
159 }
160
161 int
libusb20_tr_open(struct libusb20_transfer * xfer,uint32_t MaxBufSize,uint32_t MaxFrameCount,uint8_t ep_no)162 libusb20_tr_open(struct libusb20_transfer *xfer, uint32_t MaxBufSize,
163 uint32_t MaxFrameCount, uint8_t ep_no)
164 {
165 return (libusb20_tr_open_stream(xfer, MaxBufSize, MaxFrameCount, ep_no, 0));
166 }
167
168 int
libusb20_tr_open_stream(struct libusb20_transfer * xfer,uint32_t MaxBufSize,uint32_t MaxFrameCount,uint8_t ep_no,uint16_t stream_id)169 libusb20_tr_open_stream(struct libusb20_transfer *xfer, uint32_t MaxBufSize,
170 uint32_t MaxFrameCount, uint8_t ep_no, uint16_t stream_id)
171 {
172 uint32_t size;
173 uint8_t pre_scale;
174 int error;
175
176 if (xfer->is_opened)
177 return (LIBUSB20_ERROR_BUSY);
178 if (MaxFrameCount & LIBUSB20_MAX_FRAME_PRE_SCALE) {
179 MaxFrameCount &= ~LIBUSB20_MAX_FRAME_PRE_SCALE;
180 /*
181 * The kernel can setup 8 times more frames when
182 * pre-scaling ISOCHRONOUS transfers. Make sure the
183 * length and pointer buffers are big enough:
184 */
185 MaxFrameCount *= 8;
186 pre_scale = 1;
187 } else {
188 pre_scale = 0;
189 }
190 if (MaxFrameCount == 0)
191 return (LIBUSB20_ERROR_INVALID_PARAM);
192
193 xfer->maxFrames = MaxFrameCount;
194
195 size = MaxFrameCount * sizeof(xfer->pLength[0]);
196 xfer->pLength = malloc(size);
197 if (xfer->pLength == NULL) {
198 return (LIBUSB20_ERROR_NO_MEM);
199 }
200 memset(xfer->pLength, 0, size);
201
202 size = MaxFrameCount * sizeof(xfer->ppBuffer[0]);
203 xfer->ppBuffer = malloc(size);
204 if (xfer->ppBuffer == NULL) {
205 free(xfer->pLength);
206 return (LIBUSB20_ERROR_NO_MEM);
207 }
208 memset(xfer->ppBuffer, 0, size);
209
210 if (pre_scale) {
211 error = xfer->pdev->methods->tr_open(xfer, MaxBufSize,
212 MaxFrameCount / 8, ep_no, stream_id, 1);
213 } else {
214 error = xfer->pdev->methods->tr_open(xfer, MaxBufSize,
215 MaxFrameCount, ep_no, stream_id, 0);
216 }
217
218 if (error) {
219 free(xfer->ppBuffer);
220 free(xfer->pLength);
221 } else {
222 xfer->is_opened = 1;
223 }
224 return (error);
225 }
226
227 struct libusb20_transfer *
libusb20_tr_get_pointer(struct libusb20_device * pdev,uint16_t trIndex)228 libusb20_tr_get_pointer(struct libusb20_device *pdev, uint16_t trIndex)
229 {
230 if (trIndex >= pdev->nTransfer) {
231 return (NULL);
232 }
233 return (pdev->pTransfer + trIndex);
234 }
235
236 uint32_t
libusb20_tr_get_actual_frames(struct libusb20_transfer * xfer)237 libusb20_tr_get_actual_frames(struct libusb20_transfer *xfer)
238 {
239 return (xfer->aFrames);
240 }
241
242 uint16_t
libusb20_tr_get_time_complete(struct libusb20_transfer * xfer)243 libusb20_tr_get_time_complete(struct libusb20_transfer *xfer)
244 {
245 return (xfer->timeComplete);
246 }
247
248 uint32_t
libusb20_tr_get_actual_length(struct libusb20_transfer * xfer)249 libusb20_tr_get_actual_length(struct libusb20_transfer *xfer)
250 {
251 uint32_t x;
252 uint32_t actlen = 0;
253
254 for (x = 0; x != xfer->aFrames; x++) {
255 actlen += xfer->pLength[x];
256 }
257 return (actlen);
258 }
259
260 uint32_t
libusb20_tr_get_max_frames(struct libusb20_transfer * xfer)261 libusb20_tr_get_max_frames(struct libusb20_transfer *xfer)
262 {
263 return (xfer->maxFrames);
264 }
265
266 uint32_t
libusb20_tr_get_max_packet_length(struct libusb20_transfer * xfer)267 libusb20_tr_get_max_packet_length(struct libusb20_transfer *xfer)
268 {
269 /*
270 * Special Case NOTE: If the packet multiplier is non-zero for
271 * High Speed USB, the value returned is equal to
272 * "wMaxPacketSize * multiplier" !
273 */
274 return (xfer->maxPacketLen);
275 }
276
277 uint32_t
libusb20_tr_get_max_total_length(struct libusb20_transfer * xfer)278 libusb20_tr_get_max_total_length(struct libusb20_transfer *xfer)
279 {
280 return (xfer->maxTotalLength);
281 }
282
283 uint8_t
libusb20_tr_get_status(struct libusb20_transfer * xfer)284 libusb20_tr_get_status(struct libusb20_transfer *xfer)
285 {
286 return (xfer->status);
287 }
288
289 uint8_t
libusb20_tr_pending(struct libusb20_transfer * xfer)290 libusb20_tr_pending(struct libusb20_transfer *xfer)
291 {
292 return (xfer->is_pending);
293 }
294
295 void *
libusb20_tr_get_priv_sc0(struct libusb20_transfer * xfer)296 libusb20_tr_get_priv_sc0(struct libusb20_transfer *xfer)
297 {
298 return (xfer->priv_sc0);
299 }
300
301 void *
libusb20_tr_get_priv_sc1(struct libusb20_transfer * xfer)302 libusb20_tr_get_priv_sc1(struct libusb20_transfer *xfer)
303 {
304 return (xfer->priv_sc1);
305 }
306
307 void
libusb20_tr_stop(struct libusb20_transfer * xfer)308 libusb20_tr_stop(struct libusb20_transfer *xfer)
309 {
310 if (!xfer->is_opened) {
311 /* transfer is not opened */
312 return;
313 }
314 if (!xfer->is_pending) {
315 /* transfer not pending */
316 return;
317 }
318 if (xfer->is_cancel) {
319 /* already cancelling */
320 return;
321 }
322 xfer->is_cancel = 1; /* we are cancelling */
323
324 xfer->pdev->methods->tr_cancel_async(xfer);
325 return;
326 }
327
328 void
libusb20_tr_drain(struct libusb20_transfer * xfer)329 libusb20_tr_drain(struct libusb20_transfer *xfer)
330 {
331 if (!xfer->is_opened) {
332 /* transfer is not opened */
333 return;
334 }
335 /* make sure that we are cancelling */
336 libusb20_tr_stop(xfer);
337
338 if (xfer->is_pending) {
339 xfer->is_draining = 1;
340 }
341 return;
342 }
343
344 void
libusb20_tr_clear_stall_sync(struct libusb20_transfer * xfer)345 libusb20_tr_clear_stall_sync(struct libusb20_transfer *xfer)
346 {
347 xfer->pdev->methods->tr_clear_stall_sync(xfer);
348 return;
349 }
350
351 void
libusb20_tr_set_buffer(struct libusb20_transfer * xfer,void * buffer,uint16_t frIndex)352 libusb20_tr_set_buffer(struct libusb20_transfer *xfer, void *buffer, uint16_t frIndex)
353 {
354 xfer->ppBuffer[frIndex] = buffer;
355 return;
356 }
357
358 void
libusb20_tr_set_callback(struct libusb20_transfer * xfer,libusb20_tr_callback_t * cb)359 libusb20_tr_set_callback(struct libusb20_transfer *xfer, libusb20_tr_callback_t *cb)
360 {
361 xfer->callback = cb;
362 return;
363 }
364
365 void
libusb20_tr_set_flags(struct libusb20_transfer * xfer,uint8_t flags)366 libusb20_tr_set_flags(struct libusb20_transfer *xfer, uint8_t flags)
367 {
368 xfer->flags = flags;
369 return;
370 }
371
372 uint32_t
libusb20_tr_get_length(struct libusb20_transfer * xfer,uint16_t frIndex)373 libusb20_tr_get_length(struct libusb20_transfer *xfer, uint16_t frIndex)
374 {
375 return (xfer->pLength[frIndex]);
376 }
377
378 void
libusb20_tr_set_length(struct libusb20_transfer * xfer,uint32_t length,uint16_t frIndex)379 libusb20_tr_set_length(struct libusb20_transfer *xfer, uint32_t length, uint16_t frIndex)
380 {
381 xfer->pLength[frIndex] = length;
382 return;
383 }
384
385 void
libusb20_tr_set_priv_sc0(struct libusb20_transfer * xfer,void * sc0)386 libusb20_tr_set_priv_sc0(struct libusb20_transfer *xfer, void *sc0)
387 {
388 xfer->priv_sc0 = sc0;
389 return;
390 }
391
392 void
libusb20_tr_set_priv_sc1(struct libusb20_transfer * xfer,void * sc1)393 libusb20_tr_set_priv_sc1(struct libusb20_transfer *xfer, void *sc1)
394 {
395 xfer->priv_sc1 = sc1;
396 return;
397 }
398
399 void
libusb20_tr_set_timeout(struct libusb20_transfer * xfer,uint32_t timeout)400 libusb20_tr_set_timeout(struct libusb20_transfer *xfer, uint32_t timeout)
401 {
402 xfer->timeout = timeout;
403 return;
404 }
405
406 void
libusb20_tr_set_total_frames(struct libusb20_transfer * xfer,uint32_t nFrames)407 libusb20_tr_set_total_frames(struct libusb20_transfer *xfer, uint32_t nFrames)
408 {
409 if (nFrames > xfer->maxFrames) {
410 /* should not happen */
411 nFrames = xfer->maxFrames;
412 }
413 xfer->nFrames = nFrames;
414 return;
415 }
416
417 void
libusb20_tr_setup_bulk(struct libusb20_transfer * xfer,void * pBuf,uint32_t length,uint32_t timeout)418 libusb20_tr_setup_bulk(struct libusb20_transfer *xfer, void *pBuf, uint32_t length, uint32_t timeout)
419 {
420 xfer->ppBuffer[0] = pBuf;
421 xfer->pLength[0] = length;
422 xfer->timeout = timeout;
423 xfer->nFrames = 1;
424 return;
425 }
426
427 void
libusb20_tr_setup_control(struct libusb20_transfer * xfer,void * psetup,void * pBuf,uint32_t timeout)428 libusb20_tr_setup_control(struct libusb20_transfer *xfer, void *psetup, void *pBuf, uint32_t timeout)
429 {
430 uint16_t len;
431
432 xfer->ppBuffer[0] = psetup;
433 xfer->pLength[0] = 8; /* fixed */
434 xfer->timeout = timeout;
435
436 len = ((uint8_t *)psetup)[6] | (((uint8_t *)psetup)[7] << 8);
437
438 if (len != 0) {
439 xfer->nFrames = 2;
440 xfer->ppBuffer[1] = pBuf;
441 xfer->pLength[1] = len;
442 } else {
443 xfer->nFrames = 1;
444 }
445 return;
446 }
447
448 void
libusb20_tr_setup_intr(struct libusb20_transfer * xfer,void * pBuf,uint32_t length,uint32_t timeout)449 libusb20_tr_setup_intr(struct libusb20_transfer *xfer, void *pBuf, uint32_t length, uint32_t timeout)
450 {
451 xfer->ppBuffer[0] = pBuf;
452 xfer->pLength[0] = length;
453 xfer->timeout = timeout;
454 xfer->nFrames = 1;
455 return;
456 }
457
458 void
libusb20_tr_setup_isoc(struct libusb20_transfer * xfer,void * pBuf,uint32_t length,uint16_t frIndex)459 libusb20_tr_setup_isoc(struct libusb20_transfer *xfer, void *pBuf, uint32_t length, uint16_t frIndex)
460 {
461 if (frIndex >= xfer->maxFrames) {
462 /* should not happen */
463 return;
464 }
465 xfer->ppBuffer[frIndex] = pBuf;
466 xfer->pLength[frIndex] = length;
467 return;
468 }
469
470 uint8_t
libusb20_tr_bulk_intr_sync(struct libusb20_transfer * xfer,void * pbuf,uint32_t length,uint32_t * pactlen,uint32_t timeout)471 libusb20_tr_bulk_intr_sync(struct libusb20_transfer *xfer,
472 void *pbuf, uint32_t length, uint32_t *pactlen,
473 uint32_t timeout)
474 {
475 struct libusb20_device *pdev = xfer->pdev;
476 uint32_t transfer_max;
477 uint32_t transfer_act;
478 uint8_t retval;
479
480 /* set some sensible default value */
481 if (pactlen != NULL)
482 *pactlen = 0;
483
484 /* check for error condition */
485 if (libusb20_tr_pending(xfer))
486 return (LIBUSB20_ERROR_OTHER);
487
488 do {
489 /* compute maximum transfer length */
490 transfer_max =
491 libusb20_tr_get_max_total_length(xfer);
492
493 if (transfer_max > length)
494 transfer_max = length;
495
496 /* setup bulk or interrupt transfer */
497 libusb20_tr_setup_bulk(xfer, pbuf,
498 transfer_max, timeout);
499
500 /* start the transfer */
501 libusb20_tr_start(xfer);
502
503 /* wait for transfer completion */
504 while (libusb20_dev_process(pdev) == 0) {
505
506 if (libusb20_tr_pending(xfer) == 0)
507 break;
508
509 libusb20_dev_wait_process(pdev, -1);
510 }
511
512 transfer_act = libusb20_tr_get_actual_length(xfer);
513
514 /* update actual length, if any */
515 if (pactlen != NULL)
516 pactlen[0] += transfer_act;
517
518 /* check transfer status */
519 retval = libusb20_tr_get_status(xfer);
520 if (retval)
521 break;
522
523 /* check for short transfer */
524 if (transfer_act != transfer_max)
525 break;
526
527 /* update buffer pointer and length */
528 pbuf = ((uint8_t *)pbuf) + transfer_max;
529 length = length - transfer_max;
530
531 } while (length != 0);
532
533 return (retval);
534 }
535
536 void
libusb20_tr_submit(struct libusb20_transfer * xfer)537 libusb20_tr_submit(struct libusb20_transfer *xfer)
538 {
539 if (!xfer->is_opened) {
540 /* transfer is not opened */
541 return;
542 }
543 if (xfer->is_pending) {
544 /* should not happen */
545 return;
546 }
547 xfer->is_pending = 1; /* we are pending */
548 xfer->is_cancel = 0; /* not cancelling */
549 xfer->is_restart = 0; /* not restarting */
550
551 xfer->pdev->methods->tr_submit(xfer);
552 return;
553 }
554
555 void
libusb20_tr_start(struct libusb20_transfer * xfer)556 libusb20_tr_start(struct libusb20_transfer *xfer)
557 {
558 if (!xfer->is_opened) {
559 /* transfer is not opened */
560 return;
561 }
562 if (xfer->is_pending) {
563 if (xfer->is_cancel) {
564 /* cancelling - restart */
565 xfer->is_restart = 1;
566 }
567 /* transfer not pending */
568 return;
569 }
570 /* get into the callback */
571 libusb20_tr_callback_wrapper(xfer);
572 return;
573 }
574
575 /* USB device operations */
576
577 int
libusb20_dev_close(struct libusb20_device * pdev)578 libusb20_dev_close(struct libusb20_device *pdev)
579 {
580 struct libusb20_transfer *xfer;
581 uint16_t x;
582 int error = 0;
583
584 if (!pdev->is_opened) {
585 return (LIBUSB20_ERROR_OTHER);
586 }
587 for (x = 0; x != pdev->nTransfer; x++) {
588 xfer = pdev->pTransfer + x;
589
590 if (!xfer->is_opened) {
591 /* transfer is not opened */
592 continue;
593 }
594
595 libusb20_tr_drain(xfer);
596
597 libusb20_tr_close(xfer);
598 }
599
600 if (pdev->pTransfer != NULL) {
601 free(pdev->pTransfer);
602 pdev->pTransfer = NULL;
603 }
604 error = pdev->beMethods->close_device(pdev);
605
606 pdev->methods = &libusb20_dummy_methods;
607
608 pdev->is_opened = 0;
609
610 /*
611 * Make sure libusb20_tr_get_pointer() fails:
612 */
613 pdev->nTransfer = 0;
614
615 /*
616 * The following variable is only used by the libusb v0.1
617 * compat layer:
618 */
619 pdev->claimed_interface = 0;
620
621 /*
622 * The following variable is only used by the libusb v1.0
623 * compat layer:
624 */
625 pdev->auto_detach = 0;
626
627 return (error);
628 }
629
630 int
libusb20_dev_detach_kernel_driver(struct libusb20_device * pdev,uint8_t ifaceIndex)631 libusb20_dev_detach_kernel_driver(struct libusb20_device *pdev, uint8_t ifaceIndex)
632 {
633 int error;
634
635 error = pdev->methods->detach_kernel_driver(pdev, ifaceIndex);
636 return (error);
637 }
638
639 struct LIBUSB20_DEVICE_DESC_DECODED *
libusb20_dev_get_device_desc(struct libusb20_device * pdev)640 libusb20_dev_get_device_desc(struct libusb20_device *pdev)
641 {
642 return (&(pdev->ddesc));
643 }
644
645 int
libusb20_dev_get_fd(struct libusb20_device * pdev)646 libusb20_dev_get_fd(struct libusb20_device *pdev)
647 {
648 return (pdev->file);
649 }
650
651 int
libusb20_dev_kernel_driver_active(struct libusb20_device * pdev,uint8_t ifaceIndex)652 libusb20_dev_kernel_driver_active(struct libusb20_device *pdev, uint8_t ifaceIndex)
653 {
654 int error;
655
656 error = pdev->methods->kernel_driver_active(pdev, ifaceIndex);
657 return (error);
658 }
659
660 int
libusb20_dev_open(struct libusb20_device * pdev,uint16_t nTransferMax)661 libusb20_dev_open(struct libusb20_device *pdev, uint16_t nTransferMax)
662 {
663 struct libusb20_transfer *xfer;
664 uint32_t size;
665 uint16_t x;
666 int error;
667
668 if (pdev->is_opened) {
669 return (LIBUSB20_ERROR_BUSY);
670 }
671 if (nTransferMax >= 256) {
672 return (LIBUSB20_ERROR_INVALID_PARAM);
673 } else if (nTransferMax != 0) {
674 size = sizeof(pdev->pTransfer[0]) * nTransferMax;
675 pdev->pTransfer = malloc(size);
676 if (pdev->pTransfer == NULL) {
677 return (LIBUSB20_ERROR_NO_MEM);
678 }
679 memset(pdev->pTransfer, 0, size);
680 }
681 /* initialise all transfers */
682 for (x = 0; x != nTransferMax; x++) {
683
684 xfer = pdev->pTransfer + x;
685
686 xfer->pdev = pdev;
687 xfer->trIndex = x;
688 xfer->callback = &dummy_callback;
689 }
690
691 /* set "nTransfer" early */
692 pdev->nTransfer = nTransferMax;
693
694 error = pdev->beMethods->open_device(pdev, nTransferMax);
695
696 if (error) {
697 if (pdev->pTransfer != NULL) {
698 free(pdev->pTransfer);
699 pdev->pTransfer = NULL;
700 }
701 pdev->file = -1;
702 pdev->file_ctrl = -1;
703 pdev->nTransfer = 0;
704 } else {
705 pdev->is_opened = 1;
706 }
707 return (error);
708 }
709
710 int
libusb20_dev_reset(struct libusb20_device * pdev)711 libusb20_dev_reset(struct libusb20_device *pdev)
712 {
713 int error;
714
715 error = pdev->methods->reset_device(pdev);
716 return (error);
717 }
718
719 int
libusb20_dev_check_connected(struct libusb20_device * pdev)720 libusb20_dev_check_connected(struct libusb20_device *pdev)
721 {
722 int error;
723
724 error = pdev->methods->check_connected(pdev);
725 return (error);
726 }
727
728 int
libusb20_dev_set_power_mode(struct libusb20_device * pdev,uint8_t power_mode)729 libusb20_dev_set_power_mode(struct libusb20_device *pdev, uint8_t power_mode)
730 {
731 int error;
732
733 error = pdev->methods->set_power_mode(pdev, power_mode);
734 return (error);
735 }
736
737 uint8_t
libusb20_dev_get_power_mode(struct libusb20_device * pdev)738 libusb20_dev_get_power_mode(struct libusb20_device *pdev)
739 {
740 int error;
741 uint8_t power_mode;
742
743 error = pdev->methods->get_power_mode(pdev, &power_mode);
744 if (error)
745 power_mode = LIBUSB20_POWER_ON; /* fake power mode */
746 return (power_mode);
747 }
748
749 int
libusb20_dev_get_port_path(struct libusb20_device * pdev,uint8_t * buf,uint8_t bufsize)750 libusb20_dev_get_port_path(struct libusb20_device *pdev, uint8_t *buf, uint8_t bufsize)
751 {
752
753 if (pdev->port_level == 0) {
754 /*
755 * Fallback for backends without port path:
756 */
757 if (bufsize < 2)
758 return (LIBUSB20_ERROR_OVERFLOW);
759 buf[0] = pdev->parent_address;
760 buf[1] = pdev->parent_port;
761 return (2);
762 }
763
764 /* check if client buffer is too small */
765 if (pdev->port_level > bufsize)
766 return (LIBUSB20_ERROR_OVERFLOW);
767
768 /* copy port number information */
769 memcpy(buf, pdev->port_path, pdev->port_level);
770
771 return (pdev->port_level); /* success */
772 }
773
774 uint16_t
libusb20_dev_get_power_usage(struct libusb20_device * pdev)775 libusb20_dev_get_power_usage(struct libusb20_device *pdev)
776 {
777 int error;
778 uint16_t power_usage;
779
780 error = pdev->methods->get_power_usage(pdev, &power_usage);
781 if (error)
782 power_usage = 0;
783 return (power_usage);
784 }
785
786 int
libusb20_dev_set_alt_index(struct libusb20_device * pdev,uint8_t ifaceIndex,uint8_t altIndex)787 libusb20_dev_set_alt_index(struct libusb20_device *pdev, uint8_t ifaceIndex, uint8_t altIndex)
788 {
789 int error;
790
791 error = pdev->methods->set_alt_index(pdev, ifaceIndex, altIndex);
792 return (error);
793 }
794
795 int
libusb20_dev_set_config_index(struct libusb20_device * pdev,uint8_t configIndex)796 libusb20_dev_set_config_index(struct libusb20_device *pdev, uint8_t configIndex)
797 {
798 int error;
799
800 error = pdev->methods->set_config_index(pdev, configIndex);
801 return (error);
802 }
803
804 int
libusb20_dev_request_sync(struct libusb20_device * pdev,struct LIBUSB20_CONTROL_SETUP_DECODED * setup,void * data,uint16_t * pactlen,uint32_t timeout,uint8_t flags)805 libusb20_dev_request_sync(struct libusb20_device *pdev,
806 struct LIBUSB20_CONTROL_SETUP_DECODED *setup, void *data,
807 uint16_t *pactlen, uint32_t timeout, uint8_t flags)
808 {
809 int error;
810
811 error = pdev->methods->do_request_sync(pdev,
812 setup, data, pactlen, timeout, flags);
813 return (error);
814 }
815
816 int
libusb20_dev_req_string_sync(struct libusb20_device * pdev,uint8_t str_index,uint16_t langid,void * ptr,uint16_t len)817 libusb20_dev_req_string_sync(struct libusb20_device *pdev,
818 uint8_t str_index, uint16_t langid, void *ptr, uint16_t len)
819 {
820 struct LIBUSB20_CONTROL_SETUP_DECODED req;
821 int error;
822 int flags;
823
824 /* make sure memory is initialised */
825 memset(ptr, 0, len);
826
827 if (len < 4) {
828 /* invalid length */
829 return (LIBUSB20_ERROR_INVALID_PARAM);
830 }
831 LIBUSB20_INIT(LIBUSB20_CONTROL_SETUP, &req);
832
833 /*
834 * We need to read the USB string in two steps else some USB
835 * devices will complain.
836 */
837 req.bmRequestType =
838 LIBUSB20_REQUEST_TYPE_STANDARD |
839 LIBUSB20_RECIPIENT_DEVICE |
840 LIBUSB20_ENDPOINT_IN;
841 req.bRequest = LIBUSB20_REQUEST_GET_DESCRIPTOR;
842 req.wValue = (LIBUSB20_DT_STRING << 8) | str_index;
843 req.wIndex = langid;
844 req.wLength = 4; /* bytes */
845
846 error = libusb20_dev_request_sync(pdev, &req,
847 ptr, NULL, 1000, LIBUSB20_TRANSFER_SINGLE_SHORT_NOT_OK);
848 if (error) {
849 /* try to request full string */
850 req.wLength = 255;
851 flags = 0;
852 } else {
853 /* extract length and request full string */
854 req.wLength = *(uint8_t *)ptr;
855 flags = LIBUSB20_TRANSFER_SINGLE_SHORT_NOT_OK;
856 }
857 if (req.wLength > len) {
858 /* partial string read */
859 req.wLength = len;
860 }
861 error = libusb20_dev_request_sync(pdev, &req, ptr, NULL, 1000, flags);
862 if (error)
863 return (error);
864
865 if (((uint8_t *)ptr)[1] != LIBUSB20_DT_STRING)
866 return (LIBUSB20_ERROR_OTHER);
867 return (0); /* success */
868 }
869
870 int
libusb20_dev_req_string_simple_sync(struct libusb20_device * pdev,uint8_t str_index,void * ptr,uint16_t len)871 libusb20_dev_req_string_simple_sync(struct libusb20_device *pdev,
872 uint8_t str_index, void *ptr, uint16_t len)
873 {
874 char *buf;
875 int error;
876 uint16_t langid;
877 uint16_t n;
878 uint16_t i;
879 uint16_t c;
880 uint8_t temp[255];
881 uint8_t swap;
882
883 /* the following code derives from the FreeBSD USB kernel */
884
885 if ((len < 1) || (ptr == NULL)) {
886 /* too short buffer */
887 return (LIBUSB20_ERROR_INVALID_PARAM);
888 }
889 error = libusb20_dev_req_string_sync(pdev,
890 0, 0, temp, sizeof(temp));
891 if (error < 0) {
892 *(uint8_t *)ptr = 0; /* zero terminate */
893 return (error);
894 }
895 langid = temp[2] | (temp[3] << 8);
896
897 error = libusb20_dev_req_string_sync(pdev, str_index,
898 langid, temp, sizeof(temp));
899 if (error < 0) {
900 *(uint8_t *)ptr = 0; /* zero terminate */
901 return (error);
902 }
903 if (temp[0] < 2) {
904 /* string length is too short */
905 *(uint8_t *)ptr = 0; /* zero terminate */
906 return (LIBUSB20_ERROR_OTHER);
907 }
908 /* reserve one byte for terminating zero */
909 len--;
910
911 /* find maximum length */
912 n = (temp[0] / 2) - 1;
913 if (n > len) {
914 n = len;
915 }
916 /* reset swap state */
917 swap = 3;
918
919 /* setup output buffer pointer */
920 buf = ptr;
921
922 /* convert and filter */
923 for (i = 0; (i != n); i++) {
924 c = temp[(2 * i) + 2] | (temp[(2 * i) + 3] << 8);
925
926 /* convert from Unicode, handle buggy strings */
927 if (((c & 0xff00) == 0) && (swap & 1)) {
928 /* Little Endian, default */
929 *buf = c;
930 swap = 1;
931 } else if (((c & 0x00ff) == 0) && (swap & 2)) {
932 /* Big Endian */
933 *buf = c >> 8;
934 swap = 2;
935 } else {
936 /* skip invalid character */
937 continue;
938 }
939 /*
940 * Filter by default - we don't allow greater and less than
941 * signs because they might confuse the dmesg printouts!
942 */
943 if ((*buf == '<') || (*buf == '>') || (!isprint(*buf))) {
944 /* skip invalid character */
945 continue;
946 }
947 buf++;
948 }
949 *buf = 0; /* zero terminate string */
950
951 return (0);
952 }
953
954 struct libusb20_config *
libusb20_dev_alloc_config(struct libusb20_device * pdev,uint8_t configIndex)955 libusb20_dev_alloc_config(struct libusb20_device *pdev, uint8_t configIndex)
956 {
957 struct libusb20_config *retval = NULL;
958 uint8_t *ptr;
959 uint16_t len;
960 uint8_t do_close;
961 int error;
962
963 /*
964 * Catch invalid configuration descriptor reads early on to
965 * avoid issues with devices that don't check for a valid USB
966 * configuration read request.
967 */
968 if (configIndex >= pdev->ddesc.bNumConfigurations)
969 return (NULL);
970
971 if (!pdev->is_opened) {
972 error = libusb20_dev_open(pdev, 0);
973 if (error) {
974 return (NULL);
975 }
976 do_close = 1;
977 } else {
978 do_close = 0;
979 }
980 error = pdev->methods->get_config_desc_full(pdev,
981 &ptr, &len, configIndex);
982
983 if (error) {
984 goto done;
985 }
986 /* parse new config descriptor */
987 retval = libusb20_parse_config_desc(ptr);
988
989 /* free config descriptor */
990 free(ptr);
991
992 done:
993 if (do_close) {
994 error = libusb20_dev_close(pdev);
995 }
996 return (retval);
997 }
998
999 struct libusb20_device *
libusb20_dev_alloc(void)1000 libusb20_dev_alloc(void)
1001 {
1002 struct libusb20_device *pdev;
1003
1004 pdev = malloc(sizeof(*pdev));
1005 if (pdev == NULL) {
1006 return (NULL);
1007 }
1008 memset(pdev, 0, sizeof(*pdev));
1009
1010 pdev->file = -1;
1011 pdev->file_ctrl = -1;
1012 pdev->methods = &libusb20_dummy_methods;
1013 return (pdev);
1014 }
1015
1016 uint8_t
libusb20_dev_get_config_index(struct libusb20_device * pdev)1017 libusb20_dev_get_config_index(struct libusb20_device *pdev)
1018 {
1019 int error;
1020 uint8_t cfg_index;
1021 uint8_t do_close;
1022
1023 if (!pdev->is_opened) {
1024 error = libusb20_dev_open(pdev, 0);
1025 if (error == 0) {
1026 do_close = 1;
1027 } else {
1028 do_close = 0;
1029 }
1030 } else {
1031 do_close = 0;
1032 }
1033
1034 error = pdev->methods->get_config_index(pdev, &cfg_index);
1035 if (error)
1036 cfg_index = 0xFF; /* current config index */
1037 if (do_close) {
1038 if (libusb20_dev_close(pdev)) {
1039 /* ignore */
1040 }
1041 }
1042 return (cfg_index);
1043 }
1044
1045 uint8_t
libusb20_dev_get_mode(struct libusb20_device * pdev)1046 libusb20_dev_get_mode(struct libusb20_device *pdev)
1047 {
1048 return (pdev->usb_mode);
1049 }
1050
1051 uint8_t
libusb20_dev_get_speed(struct libusb20_device * pdev)1052 libusb20_dev_get_speed(struct libusb20_device *pdev)
1053 {
1054 return (pdev->usb_speed);
1055 }
1056
1057 int
libusb20_dev_get_stats(struct libusb20_device * pdev,struct libusb20_device_stats * pstats)1058 libusb20_dev_get_stats(struct libusb20_device *pdev, struct libusb20_device_stats *pstats)
1059 {
1060 uint8_t do_close;
1061 int error;
1062
1063 if (!pdev->is_opened) {
1064 error = libusb20_dev_open(pdev, 0);
1065 if (error == 0) {
1066 do_close = 1;
1067 } else {
1068 do_close = 0;
1069 }
1070 } else {
1071 do_close = 0;
1072 }
1073
1074 error = pdev->methods->get_stats(pdev, pstats);
1075
1076 if (do_close)
1077 (void) libusb20_dev_close(pdev);
1078
1079 return (error);
1080 }
1081
1082 /* if this function returns an error, the device is gone */
1083 int
libusb20_dev_process(struct libusb20_device * pdev)1084 libusb20_dev_process(struct libusb20_device *pdev)
1085 {
1086 int error;
1087
1088 error = pdev->methods->process(pdev);
1089 return (error);
1090 }
1091
1092 void
libusb20_dev_wait_process(struct libusb20_device * pdev,int timeout)1093 libusb20_dev_wait_process(struct libusb20_device *pdev, int timeout)
1094 {
1095 struct pollfd pfd[1];
1096
1097 if (!pdev->is_opened) {
1098 return;
1099 }
1100 pfd[0].fd = pdev->file;
1101 pfd[0].events = (POLLIN | POLLOUT | POLLRDNORM | POLLWRNORM);
1102 pfd[0].revents = 0;
1103
1104 if (poll(pfd, 1, timeout)) {
1105 /* ignore any error */
1106 }
1107 return;
1108 }
1109
1110 void
libusb20_dev_free(struct libusb20_device * pdev)1111 libusb20_dev_free(struct libusb20_device *pdev)
1112 {
1113 if (pdev == NULL) {
1114 /* be NULL safe */
1115 return;
1116 }
1117 if (pdev->is_opened) {
1118 if (libusb20_dev_close(pdev)) {
1119 /* ignore any errors */
1120 }
1121 }
1122 free(pdev);
1123 return;
1124 }
1125
1126 int
libusb20_dev_get_info(struct libusb20_device * pdev,struct usb_device_info * pinfo)1127 libusb20_dev_get_info(struct libusb20_device *pdev,
1128 struct usb_device_info *pinfo)
1129 {
1130 if (pinfo == NULL)
1131 return (LIBUSB20_ERROR_INVALID_PARAM);
1132
1133 return (pdev->beMethods->dev_get_info(pdev, pinfo));
1134 }
1135
1136 const char *
libusb20_dev_get_backend_name(struct libusb20_device * pdev)1137 libusb20_dev_get_backend_name(struct libusb20_device *pdev)
1138 {
1139 return (pdev->beMethods->get_backend_name());
1140 }
1141
1142 const char *
libusb20_dev_get_desc(struct libusb20_device * pdev)1143 libusb20_dev_get_desc(struct libusb20_device *pdev)
1144 {
1145 return (pdev->usb_desc);
1146 }
1147
1148 void
libusb20_dev_set_debug(struct libusb20_device * pdev,int debug)1149 libusb20_dev_set_debug(struct libusb20_device *pdev, int debug)
1150 {
1151 pdev->debug = debug;
1152 return;
1153 }
1154
1155 int
libusb20_dev_get_debug(struct libusb20_device * pdev)1156 libusb20_dev_get_debug(struct libusb20_device *pdev)
1157 {
1158 return (pdev->debug);
1159 }
1160
1161 uint8_t
libusb20_dev_get_address(struct libusb20_device * pdev)1162 libusb20_dev_get_address(struct libusb20_device *pdev)
1163 {
1164 return (pdev->device_address);
1165 }
1166
1167 uint8_t
libusb20_dev_get_parent_address(struct libusb20_device * pdev)1168 libusb20_dev_get_parent_address(struct libusb20_device *pdev)
1169 {
1170 return (pdev->parent_address);
1171 }
1172
1173 uint8_t
libusb20_dev_get_parent_port(struct libusb20_device * pdev)1174 libusb20_dev_get_parent_port(struct libusb20_device *pdev)
1175 {
1176 return (pdev->parent_port);
1177 }
1178
1179 uint8_t
libusb20_dev_get_bus_number(struct libusb20_device * pdev)1180 libusb20_dev_get_bus_number(struct libusb20_device *pdev)
1181 {
1182 return (pdev->bus_number);
1183 }
1184
1185 int
libusb20_dev_get_iface_desc(struct libusb20_device * pdev,uint8_t iface_index,char * buf,uint8_t len)1186 libusb20_dev_get_iface_desc(struct libusb20_device *pdev,
1187 uint8_t iface_index, char *buf, uint8_t len)
1188 {
1189 if ((buf == NULL) || (len == 0))
1190 return (LIBUSB20_ERROR_INVALID_PARAM);
1191
1192 buf[0] = 0; /* set default string value */
1193
1194 return (pdev->beMethods->dev_get_iface_desc(
1195 pdev, iface_index, buf, len));
1196 }
1197
1198 /* USB backend operations */
1199
1200 int
libusb20_be_get_dev_quirk(struct libusb20_backend * pbe,uint16_t quirk_index,struct libusb20_quirk * pq)1201 libusb20_be_get_dev_quirk(struct libusb20_backend *pbe,
1202 uint16_t quirk_index, struct libusb20_quirk *pq)
1203 {
1204 return (pbe->methods->root_get_dev_quirk(pbe, quirk_index, pq));
1205 }
1206
1207 int
libusb20_be_get_quirk_name(struct libusb20_backend * pbe,uint16_t quirk_index,struct libusb20_quirk * pq)1208 libusb20_be_get_quirk_name(struct libusb20_backend *pbe,
1209 uint16_t quirk_index, struct libusb20_quirk *pq)
1210 {
1211 return (pbe->methods->root_get_quirk_name(pbe, quirk_index, pq));
1212 }
1213
1214 int
libusb20_be_add_dev_quirk(struct libusb20_backend * pbe,struct libusb20_quirk * pq)1215 libusb20_be_add_dev_quirk(struct libusb20_backend *pbe,
1216 struct libusb20_quirk *pq)
1217 {
1218 return (pbe->methods->root_add_dev_quirk(pbe, pq));
1219 }
1220
1221 int
libusb20_be_remove_dev_quirk(struct libusb20_backend * pbe,struct libusb20_quirk * pq)1222 libusb20_be_remove_dev_quirk(struct libusb20_backend *pbe,
1223 struct libusb20_quirk *pq)
1224 {
1225 return (pbe->methods->root_remove_dev_quirk(pbe, pq));
1226 }
1227
1228 int
libusb20_be_set_template(struct libusb20_backend * pbe,int temp)1229 libusb20_be_set_template(struct libusb20_backend *pbe, int temp)
1230 {
1231 return (pbe->methods->root_set_template(pbe, temp));
1232 }
1233
1234 int
libusb20_be_get_template(struct libusb20_backend * pbe,int * ptemp)1235 libusb20_be_get_template(struct libusb20_backend *pbe, int *ptemp)
1236 {
1237 int temp;
1238
1239 if (ptemp == NULL)
1240 ptemp = &temp;
1241
1242 return (pbe->methods->root_get_template(pbe, ptemp));
1243 }
1244
1245 struct libusb20_device *
libusb20_be_device_foreach(struct libusb20_backend * pbe,struct libusb20_device * pdev)1246 libusb20_be_device_foreach(struct libusb20_backend *pbe, struct libusb20_device *pdev)
1247 {
1248 if (pbe == NULL) {
1249 pdev = NULL;
1250 } else if (pdev == NULL) {
1251 pdev = TAILQ_FIRST(&(pbe->usb_devs));
1252 } else {
1253 pdev = TAILQ_NEXT(pdev, dev_entry);
1254 }
1255 return (pdev);
1256 }
1257
1258 struct libusb20_backend *
libusb20_be_alloc(const struct libusb20_backend_methods * methods)1259 libusb20_be_alloc(const struct libusb20_backend_methods *methods)
1260 {
1261 struct libusb20_backend *pbe;
1262
1263 pbe = malloc(sizeof(*pbe));
1264 if (pbe == NULL) {
1265 return (NULL);
1266 }
1267 memset(pbe, 0, sizeof(*pbe));
1268
1269 TAILQ_INIT(&(pbe->usb_devs));
1270
1271 pbe->methods = methods; /* set backend methods */
1272
1273 /* do the initial device scan */
1274 if (pbe->methods->init_backend) {
1275 pbe->methods->init_backend(pbe);
1276 }
1277 return (pbe);
1278 }
1279
1280 struct libusb20_backend *
libusb20_be_alloc_linux(void)1281 libusb20_be_alloc_linux(void)
1282 {
1283 return (NULL);
1284 }
1285
1286 struct libusb20_backend *
libusb20_be_alloc_ugen20(void)1287 libusb20_be_alloc_ugen20(void)
1288 {
1289 return (libusb20_be_alloc(&libusb20_ugen20_backend));
1290 }
1291
1292 struct libusb20_backend *
libusb20_be_alloc_default(void)1293 libusb20_be_alloc_default(void)
1294 {
1295 struct libusb20_backend *pbe;
1296
1297 #ifdef __linux__
1298 pbe = libusb20_be_alloc_linux();
1299 if (pbe) {
1300 return (pbe);
1301 }
1302 #endif
1303 pbe = libusb20_be_alloc_ugen20();
1304 if (pbe) {
1305 return (pbe);
1306 }
1307 return (NULL); /* no backend found */
1308 }
1309
1310 void
libusb20_be_free(struct libusb20_backend * pbe)1311 libusb20_be_free(struct libusb20_backend *pbe)
1312 {
1313 struct libusb20_device *pdev;
1314
1315 if (pbe == NULL) {
1316 /* be NULL safe */
1317 return;
1318 }
1319 while ((pdev = libusb20_be_device_foreach(pbe, NULL))) {
1320 libusb20_be_dequeue_device(pbe, pdev);
1321 libusb20_dev_free(pdev);
1322 }
1323 if (pbe->methods->exit_backend) {
1324 pbe->methods->exit_backend(pbe);
1325 }
1326 /* free backend */
1327 free(pbe);
1328 }
1329
1330 void
libusb20_be_enqueue_device(struct libusb20_backend * pbe,struct libusb20_device * pdev)1331 libusb20_be_enqueue_device(struct libusb20_backend *pbe, struct libusb20_device *pdev)
1332 {
1333 pdev->beMethods = pbe->methods; /* copy backend methods */
1334 TAILQ_INSERT_TAIL(&(pbe->usb_devs), pdev, dev_entry);
1335 }
1336
1337 void
libusb20_be_dequeue_device(struct libusb20_backend * pbe,struct libusb20_device * pdev)1338 libusb20_be_dequeue_device(struct libusb20_backend *pbe,
1339 struct libusb20_device *pdev)
1340 {
1341 TAILQ_REMOVE(&(pbe->usb_devs), pdev, dev_entry);
1342 }
1343
1344 const char *
libusb20_strerror(int code)1345 libusb20_strerror(int code)
1346 {
1347 switch (code) {
1348 case LIBUSB20_SUCCESS:
1349 return ("Success");
1350 case LIBUSB20_ERROR_IO:
1351 return ("I/O error");
1352 case LIBUSB20_ERROR_INVALID_PARAM:
1353 return ("Invalid parameter");
1354 case LIBUSB20_ERROR_ACCESS:
1355 return ("Permissions error");
1356 case LIBUSB20_ERROR_NO_DEVICE:
1357 return ("No device");
1358 case LIBUSB20_ERROR_NOT_FOUND:
1359 return ("Not found");
1360 case LIBUSB20_ERROR_BUSY:
1361 return ("Device busy");
1362 case LIBUSB20_ERROR_TIMEOUT:
1363 return ("Timeout");
1364 case LIBUSB20_ERROR_OVERFLOW:
1365 return ("Overflow");
1366 case LIBUSB20_ERROR_PIPE:
1367 return ("Pipe error");
1368 case LIBUSB20_ERROR_INTERRUPTED:
1369 return ("Interrupted");
1370 case LIBUSB20_ERROR_NO_MEM:
1371 return ("Out of memory");
1372 case LIBUSB20_ERROR_NOT_SUPPORTED:
1373 return ("Not supported");
1374 case LIBUSB20_ERROR_OTHER:
1375 return ("Other error");
1376 default:
1377 return ("Unknown error");
1378 }
1379 }
1380
1381 const char *
libusb20_error_name(int code)1382 libusb20_error_name(int code)
1383 {
1384 switch (code) {
1385 case LIBUSB20_SUCCESS:
1386 return ("LIBUSB20_SUCCESS");
1387 case LIBUSB20_ERROR_IO:
1388 return ("LIBUSB20_ERROR_IO");
1389 case LIBUSB20_ERROR_INVALID_PARAM:
1390 return ("LIBUSB20_ERROR_INVALID_PARAM");
1391 case LIBUSB20_ERROR_ACCESS:
1392 return ("LIBUSB20_ERROR_ACCESS");
1393 case LIBUSB20_ERROR_NO_DEVICE:
1394 return ("LIBUSB20_ERROR_NO_DEVICE");
1395 case LIBUSB20_ERROR_NOT_FOUND:
1396 return ("LIBUSB20_ERROR_NOT_FOUND");
1397 case LIBUSB20_ERROR_BUSY:
1398 return ("LIBUSB20_ERROR_BUSY");
1399 case LIBUSB20_ERROR_TIMEOUT:
1400 return ("LIBUSB20_ERROR_TIMEOUT");
1401 case LIBUSB20_ERROR_OVERFLOW:
1402 return ("LIBUSB20_ERROR_OVERFLOW");
1403 case LIBUSB20_ERROR_PIPE:
1404 return ("LIBUSB20_ERROR_PIPE");
1405 case LIBUSB20_ERROR_INTERRUPTED:
1406 return ("LIBUSB20_ERROR_INTERRUPTED");
1407 case LIBUSB20_ERROR_NO_MEM:
1408 return ("LIBUSB20_ERROR_NO_MEM");
1409 case LIBUSB20_ERROR_NOT_SUPPORTED:
1410 return ("LIBUSB20_ERROR_NOT_SUPPORTED");
1411 case LIBUSB20_ERROR_OTHER:
1412 return ("LIBUSB20_ERROR_OTHER");
1413 default:
1414 return ("LIBUSB20_ERROR_UNKNOWN");
1415 }
1416 }
1417