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_attach_kernel_driver (void *)dummy_int
84 #define dummy_do_request_sync (void *)dummy_int
85 #define dummy_tr_open (void *)dummy_int
86 #define dummy_tr_close (void *)dummy_int
87 #define dummy_tr_clear_stall_sync (void *)dummy_int
88 #define dummy_process (void *)dummy_int
89 #define dummy_dev_info (void *)dummy_int
90 #define dummy_dev_get_iface_driver (void *)dummy_int
91
92 #define dummy_tr_submit (void *)dummy_void
93 #define dummy_tr_cancel_async (void *)dummy_void
94
95 static const struct libusb20_device_methods libusb20_dummy_methods = {
96 LIBUSB20_DEVICE(LIBUSB20_DECLARE, dummy)
97 };
98
99 void
libusb20_tr_callback_wrapper(struct libusb20_transfer * xfer)100 libusb20_tr_callback_wrapper(struct libusb20_transfer *xfer)
101 {
102 ; /* style fix */
103
104 repeat:
105
106 if (!xfer->is_pending) {
107 xfer->status = LIBUSB20_TRANSFER_START;
108 } else {
109 xfer->is_pending = 0;
110 }
111
112 xfer->callback(xfer);
113
114 if (xfer->is_restart) {
115 xfer->is_restart = 0;
116 goto repeat;
117 }
118 if (xfer->is_draining &&
119 (!xfer->is_pending)) {
120 xfer->is_draining = 0;
121 xfer->status = LIBUSB20_TRANSFER_DRAINED;
122 xfer->callback(xfer);
123 }
124 return;
125 }
126
127 int
libusb20_tr_close(struct libusb20_transfer * xfer)128 libusb20_tr_close(struct libusb20_transfer *xfer)
129 {
130 int error;
131
132 if (!xfer->is_opened) {
133 return (LIBUSB20_ERROR_OTHER);
134 }
135 error = xfer->pdev->methods->tr_close(xfer);
136
137 if (xfer->pLength) {
138 free(xfer->pLength);
139 }
140 if (xfer->ppBuffer) {
141 free(xfer->ppBuffer);
142 }
143 /* reset variable fields in case the transfer is opened again */
144 xfer->priv_sc0 = NULL;
145 xfer->priv_sc1 = NULL;
146 xfer->is_opened = 0;
147 xfer->is_pending = 0;
148 xfer->is_cancel = 0;
149 xfer->is_draining = 0;
150 xfer->is_restart = 0;
151 xfer->status = 0;
152 xfer->flags = 0;
153 xfer->nFrames = 0;
154 xfer->aFrames = 0;
155 xfer->timeout = 0;
156 xfer->maxFrames = 0;
157 xfer->maxTotalLength = 0;
158 xfer->maxPacketLen = 0;
159 return (error);
160 }
161
162 int
libusb20_tr_open(struct libusb20_transfer * xfer,uint32_t MaxBufSize,uint32_t MaxFrameCount,uint8_t ep_no)163 libusb20_tr_open(struct libusb20_transfer *xfer, uint32_t MaxBufSize,
164 uint32_t MaxFrameCount, uint8_t ep_no)
165 {
166 return (libusb20_tr_open_stream(xfer, MaxBufSize, MaxFrameCount, ep_no, 0));
167 }
168
169 int
libusb20_tr_open_stream(struct libusb20_transfer * xfer,uint32_t MaxBufSize,uint32_t MaxFrameCount,uint8_t ep_no,uint16_t stream_id)170 libusb20_tr_open_stream(struct libusb20_transfer *xfer, uint32_t MaxBufSize,
171 uint32_t MaxFrameCount, uint8_t ep_no, uint16_t stream_id)
172 {
173 uint32_t size;
174 uint8_t pre_scale;
175 int error;
176
177 if (xfer->is_opened)
178 return (LIBUSB20_ERROR_BUSY);
179 if (MaxFrameCount & LIBUSB20_MAX_FRAME_PRE_SCALE) {
180 MaxFrameCount &= ~LIBUSB20_MAX_FRAME_PRE_SCALE;
181 /*
182 * The kernel can setup 8 times more frames when
183 * pre-scaling ISOCHRONOUS transfers. Make sure the
184 * length and pointer buffers are big enough:
185 */
186 MaxFrameCount *= 8;
187 pre_scale = 1;
188 } else {
189 pre_scale = 0;
190 }
191 if (MaxFrameCount == 0)
192 return (LIBUSB20_ERROR_INVALID_PARAM);
193
194 xfer->maxFrames = MaxFrameCount;
195
196 size = MaxFrameCount * sizeof(xfer->pLength[0]);
197 xfer->pLength = malloc(size);
198 if (xfer->pLength == NULL) {
199 return (LIBUSB20_ERROR_NO_MEM);
200 }
201 memset(xfer->pLength, 0, size);
202
203 size = MaxFrameCount * sizeof(xfer->ppBuffer[0]);
204 xfer->ppBuffer = malloc(size);
205 if (xfer->ppBuffer == NULL) {
206 free(xfer->pLength);
207 return (LIBUSB20_ERROR_NO_MEM);
208 }
209 memset(xfer->ppBuffer, 0, size);
210
211 if (pre_scale) {
212 error = xfer->pdev->methods->tr_open(xfer, MaxBufSize,
213 MaxFrameCount / 8, ep_no, stream_id, 1);
214 } else {
215 error = xfer->pdev->methods->tr_open(xfer, MaxBufSize,
216 MaxFrameCount, ep_no, stream_id, 0);
217 }
218
219 if (error) {
220 free(xfer->ppBuffer);
221 free(xfer->pLength);
222 } else {
223 xfer->is_opened = 1;
224 }
225 return (error);
226 }
227
228 struct libusb20_transfer *
libusb20_tr_get_pointer(struct libusb20_device * pdev,uint16_t trIndex)229 libusb20_tr_get_pointer(struct libusb20_device *pdev, uint16_t trIndex)
230 {
231 if (trIndex >= pdev->nTransfer) {
232 return (NULL);
233 }
234 return (pdev->pTransfer + trIndex);
235 }
236
237 uint32_t
libusb20_tr_get_actual_frames(struct libusb20_transfer * xfer)238 libusb20_tr_get_actual_frames(struct libusb20_transfer *xfer)
239 {
240 return (xfer->aFrames);
241 }
242
243 uint16_t
libusb20_tr_get_time_complete(struct libusb20_transfer * xfer)244 libusb20_tr_get_time_complete(struct libusb20_transfer *xfer)
245 {
246 return (xfer->timeComplete);
247 }
248
249 uint32_t
libusb20_tr_get_actual_length(struct libusb20_transfer * xfer)250 libusb20_tr_get_actual_length(struct libusb20_transfer *xfer)
251 {
252 uint32_t x;
253 uint32_t actlen = 0;
254
255 for (x = 0; x != xfer->aFrames; x++) {
256 actlen += xfer->pLength[x];
257 }
258 return (actlen);
259 }
260
261 uint32_t
libusb20_tr_get_max_frames(struct libusb20_transfer * xfer)262 libusb20_tr_get_max_frames(struct libusb20_transfer *xfer)
263 {
264 return (xfer->maxFrames);
265 }
266
267 uint32_t
libusb20_tr_get_max_packet_length(struct libusb20_transfer * xfer)268 libusb20_tr_get_max_packet_length(struct libusb20_transfer *xfer)
269 {
270 /*
271 * Special Case NOTE: If the packet multiplier is non-zero for
272 * High Speed USB, the value returned is equal to
273 * "wMaxPacketSize * multiplier" !
274 */
275 return (xfer->maxPacketLen);
276 }
277
278 uint32_t
libusb20_tr_get_max_total_length(struct libusb20_transfer * xfer)279 libusb20_tr_get_max_total_length(struct libusb20_transfer *xfer)
280 {
281 return (xfer->maxTotalLength);
282 }
283
284 uint8_t
libusb20_tr_get_status(struct libusb20_transfer * xfer)285 libusb20_tr_get_status(struct libusb20_transfer *xfer)
286 {
287 return (xfer->status);
288 }
289
290 uint8_t
libusb20_tr_pending(struct libusb20_transfer * xfer)291 libusb20_tr_pending(struct libusb20_transfer *xfer)
292 {
293 return (xfer->is_pending);
294 }
295
296 void *
libusb20_tr_get_priv_sc0(struct libusb20_transfer * xfer)297 libusb20_tr_get_priv_sc0(struct libusb20_transfer *xfer)
298 {
299 return (xfer->priv_sc0);
300 }
301
302 void *
libusb20_tr_get_priv_sc1(struct libusb20_transfer * xfer)303 libusb20_tr_get_priv_sc1(struct libusb20_transfer *xfer)
304 {
305 return (xfer->priv_sc1);
306 }
307
308 void
libusb20_tr_stop(struct libusb20_transfer * xfer)309 libusb20_tr_stop(struct libusb20_transfer *xfer)
310 {
311 if (!xfer->is_opened) {
312 /* transfer is not opened */
313 return;
314 }
315 if (!xfer->is_pending) {
316 /* transfer not pending */
317 return;
318 }
319 if (xfer->is_cancel) {
320 /* already cancelling */
321 return;
322 }
323 xfer->is_cancel = 1; /* we are cancelling */
324
325 xfer->pdev->methods->tr_cancel_async(xfer);
326 return;
327 }
328
329 void
libusb20_tr_drain(struct libusb20_transfer * xfer)330 libusb20_tr_drain(struct libusb20_transfer *xfer)
331 {
332 if (!xfer->is_opened) {
333 /* transfer is not opened */
334 return;
335 }
336 /* make sure that we are cancelling */
337 libusb20_tr_stop(xfer);
338
339 if (xfer->is_pending) {
340 xfer->is_draining = 1;
341 }
342 return;
343 }
344
345 void
libusb20_tr_clear_stall_sync(struct libusb20_transfer * xfer)346 libusb20_tr_clear_stall_sync(struct libusb20_transfer *xfer)
347 {
348 xfer->pdev->methods->tr_clear_stall_sync(xfer);
349 return;
350 }
351
352 void
libusb20_tr_set_buffer(struct libusb20_transfer * xfer,void * buffer,uint16_t frIndex)353 libusb20_tr_set_buffer(struct libusb20_transfer *xfer, void *buffer, uint16_t frIndex)
354 {
355 xfer->ppBuffer[frIndex] = buffer;
356 return;
357 }
358
359 void
libusb20_tr_set_callback(struct libusb20_transfer * xfer,libusb20_tr_callback_t * cb)360 libusb20_tr_set_callback(struct libusb20_transfer *xfer, libusb20_tr_callback_t *cb)
361 {
362 xfer->callback = cb;
363 return;
364 }
365
366 void
libusb20_tr_set_flags(struct libusb20_transfer * xfer,uint8_t flags)367 libusb20_tr_set_flags(struct libusb20_transfer *xfer, uint8_t flags)
368 {
369 xfer->flags = flags;
370 return;
371 }
372
373 uint8_t
libusb20_tr_get_flags(struct libusb20_transfer * xfer)374 libusb20_tr_get_flags(struct libusb20_transfer *xfer)
375 {
376 return (xfer->flags);
377 }
378
379 uint32_t
libusb20_tr_get_length(struct libusb20_transfer * xfer,uint16_t frIndex)380 libusb20_tr_get_length(struct libusb20_transfer *xfer, uint16_t frIndex)
381 {
382 return (xfer->pLength[frIndex]);
383 }
384
385 void
libusb20_tr_set_length(struct libusb20_transfer * xfer,uint32_t length,uint16_t frIndex)386 libusb20_tr_set_length(struct libusb20_transfer *xfer, uint32_t length, uint16_t frIndex)
387 {
388 xfer->pLength[frIndex] = length;
389 return;
390 }
391
392 void
libusb20_tr_set_priv_sc0(struct libusb20_transfer * xfer,void * sc0)393 libusb20_tr_set_priv_sc0(struct libusb20_transfer *xfer, void *sc0)
394 {
395 xfer->priv_sc0 = sc0;
396 return;
397 }
398
399 void
libusb20_tr_set_priv_sc1(struct libusb20_transfer * xfer,void * sc1)400 libusb20_tr_set_priv_sc1(struct libusb20_transfer *xfer, void *sc1)
401 {
402 xfer->priv_sc1 = sc1;
403 return;
404 }
405
406 void
libusb20_tr_set_timeout(struct libusb20_transfer * xfer,uint32_t timeout)407 libusb20_tr_set_timeout(struct libusb20_transfer *xfer, uint32_t timeout)
408 {
409 xfer->timeout = timeout;
410 return;
411 }
412
413 void
libusb20_tr_set_total_frames(struct libusb20_transfer * xfer,uint32_t nFrames)414 libusb20_tr_set_total_frames(struct libusb20_transfer *xfer, uint32_t nFrames)
415 {
416 if (nFrames > xfer->maxFrames) {
417 /* should not happen */
418 nFrames = xfer->maxFrames;
419 }
420 xfer->nFrames = nFrames;
421 return;
422 }
423
424 void
libusb20_tr_setup_bulk(struct libusb20_transfer * xfer,void * pBuf,uint32_t length,uint32_t timeout)425 libusb20_tr_setup_bulk(struct libusb20_transfer *xfer, void *pBuf, uint32_t length, uint32_t timeout)
426 {
427 xfer->ppBuffer[0] = pBuf;
428 xfer->pLength[0] = length;
429 xfer->timeout = timeout;
430 xfer->nFrames = 1;
431 return;
432 }
433
434 void
libusb20_tr_setup_control(struct libusb20_transfer * xfer,void * psetup,void * pBuf,uint32_t timeout)435 libusb20_tr_setup_control(struct libusb20_transfer *xfer, void *psetup, void *pBuf, uint32_t timeout)
436 {
437 uint16_t len;
438
439 xfer->ppBuffer[0] = psetup;
440 xfer->pLength[0] = 8; /* fixed */
441 xfer->timeout = timeout;
442
443 len = ((uint8_t *)psetup)[6] | (((uint8_t *)psetup)[7] << 8);
444
445 if (len != 0) {
446 xfer->nFrames = 2;
447 xfer->ppBuffer[1] = pBuf;
448 xfer->pLength[1] = len;
449 } else {
450 xfer->nFrames = 1;
451 }
452 return;
453 }
454
455 void
libusb20_tr_setup_intr(struct libusb20_transfer * xfer,void * pBuf,uint32_t length,uint32_t timeout)456 libusb20_tr_setup_intr(struct libusb20_transfer *xfer, void *pBuf, uint32_t length, uint32_t timeout)
457 {
458 xfer->ppBuffer[0] = pBuf;
459 xfer->pLength[0] = length;
460 xfer->timeout = timeout;
461 xfer->nFrames = 1;
462 return;
463 }
464
465 void
libusb20_tr_setup_isoc(struct libusb20_transfer * xfer,void * pBuf,uint32_t length,uint16_t frIndex)466 libusb20_tr_setup_isoc(struct libusb20_transfer *xfer, void *pBuf, uint32_t length, uint16_t frIndex)
467 {
468 if (frIndex >= xfer->maxFrames) {
469 /* should not happen */
470 return;
471 }
472 xfer->ppBuffer[frIndex] = pBuf;
473 xfer->pLength[frIndex] = length;
474 return;
475 }
476
477 uint8_t
libusb20_tr_bulk_intr_sync(struct libusb20_transfer * xfer,void * pbuf,uint32_t length,uint32_t * pactlen,uint32_t timeout)478 libusb20_tr_bulk_intr_sync(struct libusb20_transfer *xfer,
479 void *pbuf, uint32_t length, uint32_t *pactlen,
480 uint32_t timeout)
481 {
482 struct libusb20_device *pdev = xfer->pdev;
483 uint32_t transfer_max;
484 uint32_t transfer_act;
485 uint8_t retval;
486
487 /* set some sensible default value */
488 if (pactlen != NULL)
489 *pactlen = 0;
490
491 /* check for error condition */
492 if (libusb20_tr_pending(xfer))
493 return (LIBUSB20_ERROR_OTHER);
494
495 do {
496 /* compute maximum transfer length */
497 transfer_max =
498 libusb20_tr_get_max_total_length(xfer);
499
500 if (transfer_max > length)
501 transfer_max = length;
502
503 /* setup bulk or interrupt transfer */
504 libusb20_tr_setup_bulk(xfer, pbuf,
505 transfer_max, timeout);
506
507 /* start the transfer */
508 libusb20_tr_start(xfer);
509
510 /* wait for transfer completion */
511 while (libusb20_dev_process(pdev) == 0) {
512
513 if (libusb20_tr_pending(xfer) == 0)
514 break;
515
516 libusb20_dev_wait_process(pdev, -1);
517 }
518
519 transfer_act = libusb20_tr_get_actual_length(xfer);
520
521 /* update actual length, if any */
522 if (pactlen != NULL)
523 pactlen[0] += transfer_act;
524
525 /* check transfer status */
526 retval = libusb20_tr_get_status(xfer);
527 if (retval)
528 break;
529
530 /* check for short transfer */
531 if (transfer_act != transfer_max)
532 break;
533
534 /* update buffer pointer and length */
535 pbuf = ((uint8_t *)pbuf) + transfer_max;
536 length = length - transfer_max;
537
538 } while (length != 0);
539
540 return (retval);
541 }
542
543 void
libusb20_tr_submit(struct libusb20_transfer * xfer)544 libusb20_tr_submit(struct libusb20_transfer *xfer)
545 {
546 if (!xfer->is_opened) {
547 /* transfer is not opened */
548 return;
549 }
550 if (xfer->is_pending) {
551 /* should not happen */
552 return;
553 }
554 xfer->is_pending = 1; /* we are pending */
555 xfer->is_cancel = 0; /* not cancelling */
556 xfer->is_restart = 0; /* not restarting */
557
558 xfer->pdev->methods->tr_submit(xfer);
559 return;
560 }
561
562 void
libusb20_tr_start(struct libusb20_transfer * xfer)563 libusb20_tr_start(struct libusb20_transfer *xfer)
564 {
565 if (!xfer->is_opened) {
566 /* transfer is not opened */
567 return;
568 }
569 if (xfer->is_pending) {
570 if (xfer->is_cancel) {
571 /* cancelling - restart */
572 xfer->is_restart = 1;
573 }
574 /* transfer not pending */
575 return;
576 }
577 /* get into the callback */
578 libusb20_tr_callback_wrapper(xfer);
579 return;
580 }
581
582 /* USB device operations */
583
584 int
libusb20_dev_close(struct libusb20_device * pdev)585 libusb20_dev_close(struct libusb20_device *pdev)
586 {
587 struct libusb20_transfer *xfer;
588 uint16_t x;
589 int error = 0;
590
591 if (!pdev->is_opened) {
592 return (LIBUSB20_ERROR_OTHER);
593 }
594 for (x = 0; x != pdev->nTransfer; x++) {
595 xfer = pdev->pTransfer + x;
596
597 if (!xfer->is_opened) {
598 /* transfer is not opened */
599 continue;
600 }
601
602 libusb20_tr_drain(xfer);
603
604 libusb20_tr_close(xfer);
605 }
606
607 if (pdev->pTransfer != NULL) {
608 free(pdev->pTransfer);
609 pdev->pTransfer = NULL;
610 }
611 error = pdev->beMethods->close_device(pdev);
612
613 pdev->methods = &libusb20_dummy_methods;
614
615 pdev->is_opened = 0;
616
617 /*
618 * Make sure libusb20_tr_get_pointer() fails:
619 */
620 pdev->nTransfer = 0;
621
622 /*
623 * The following variable is only used by the libusb v0.1
624 * compat layer:
625 */
626 pdev->claimed_interface = 0;
627
628 /*
629 * The following variable is only used by the libusb v1.0
630 * compat layer:
631 */
632 pdev->auto_detach = 0;
633
634 return (error);
635 }
636
637 int
libusb20_dev_detach_kernel_driver(struct libusb20_device * pdev,uint8_t ifaceIndex)638 libusb20_dev_detach_kernel_driver(struct libusb20_device *pdev, uint8_t ifaceIndex)
639 {
640 int error;
641
642 error = pdev->methods->detach_kernel_driver(pdev, ifaceIndex);
643 return (error);
644 }
645
646 int
libusb20_dev_attach_kernel_driver(struct libusb20_device * pdev,uint8_t ifaceIndex)647 libusb20_dev_attach_kernel_driver(struct libusb20_device *pdev,
648 uint8_t ifaceIndex)
649 {
650 int error;
651
652 error = pdev->methods->attach_kernel_driver(pdev, ifaceIndex);
653 return (error);
654 }
655
656 struct LIBUSB20_DEVICE_DESC_DECODED *
libusb20_dev_get_device_desc(struct libusb20_device * pdev)657 libusb20_dev_get_device_desc(struct libusb20_device *pdev)
658 {
659 return (&(pdev->ddesc));
660 }
661
662 int
libusb20_dev_get_fd(struct libusb20_device * pdev)663 libusb20_dev_get_fd(struct libusb20_device *pdev)
664 {
665 return (pdev->file);
666 }
667
668 int
libusb20_dev_kernel_driver_active(struct libusb20_device * pdev,uint8_t ifaceIndex)669 libusb20_dev_kernel_driver_active(struct libusb20_device *pdev, uint8_t ifaceIndex)
670 {
671 int error;
672
673 error = pdev->methods->kernel_driver_active(pdev, ifaceIndex);
674 return (error);
675 }
676
677 int
libusb20_dev_open(struct libusb20_device * pdev,uint16_t nTransferMax)678 libusb20_dev_open(struct libusb20_device *pdev, uint16_t nTransferMax)
679 {
680 struct libusb20_transfer *xfer;
681 uint32_t size;
682 uint16_t x;
683 int error;
684
685 if (pdev->is_opened) {
686 return (LIBUSB20_ERROR_BUSY);
687 }
688 if (nTransferMax >= 256) {
689 return (LIBUSB20_ERROR_INVALID_PARAM);
690 } else if (nTransferMax != 0) {
691 size = sizeof(pdev->pTransfer[0]) * nTransferMax;
692 pdev->pTransfer = malloc(size);
693 if (pdev->pTransfer == NULL) {
694 return (LIBUSB20_ERROR_NO_MEM);
695 }
696 memset(pdev->pTransfer, 0, size);
697 }
698 /* initialise all transfers */
699 for (x = 0; x != nTransferMax; x++) {
700
701 xfer = pdev->pTransfer + x;
702
703 xfer->pdev = pdev;
704 xfer->trIndex = x;
705 xfer->callback = &dummy_callback;
706 }
707
708 /* set "nTransfer" early */
709 pdev->nTransfer = nTransferMax;
710
711 error = pdev->beMethods->open_device(pdev, nTransferMax);
712
713 if (error) {
714 if (pdev->pTransfer != NULL) {
715 free(pdev->pTransfer);
716 pdev->pTransfer = NULL;
717 }
718 pdev->file = -1;
719 pdev->file_ctrl = -1;
720 pdev->nTransfer = 0;
721 } else {
722 pdev->is_opened = 1;
723 }
724 return (error);
725 }
726
727 int
libusb20_dev_reset(struct libusb20_device * pdev)728 libusb20_dev_reset(struct libusb20_device *pdev)
729 {
730 int error;
731
732 error = pdev->methods->reset_device(pdev);
733 return (error);
734 }
735
736 int
libusb20_dev_check_connected(struct libusb20_device * pdev)737 libusb20_dev_check_connected(struct libusb20_device *pdev)
738 {
739 int error;
740
741 error = pdev->methods->check_connected(pdev);
742 return (error);
743 }
744
745 int
libusb20_dev_set_power_mode(struct libusb20_device * pdev,uint8_t power_mode)746 libusb20_dev_set_power_mode(struct libusb20_device *pdev, uint8_t power_mode)
747 {
748 int error;
749
750 error = pdev->methods->set_power_mode(pdev, power_mode);
751 return (error);
752 }
753
754 uint8_t
libusb20_dev_get_power_mode(struct libusb20_device * pdev)755 libusb20_dev_get_power_mode(struct libusb20_device *pdev)
756 {
757 int error;
758 uint8_t power_mode;
759
760 error = pdev->methods->get_power_mode(pdev, &power_mode);
761 if (error)
762 power_mode = LIBUSB20_POWER_ON; /* fake power mode */
763 return (power_mode);
764 }
765
766 int
libusb20_dev_get_port_path(struct libusb20_device * pdev,uint8_t * buf,uint8_t bufsize)767 libusb20_dev_get_port_path(struct libusb20_device *pdev, uint8_t *buf, uint8_t bufsize)
768 {
769
770 if (pdev->port_level == 0) {
771 /*
772 * Fallback for backends without port path:
773 */
774 if (bufsize < 2)
775 return (LIBUSB20_ERROR_OVERFLOW);
776 buf[0] = pdev->parent_address;
777 buf[1] = pdev->parent_port;
778 return (2);
779 }
780
781 /* check if client buffer is too small */
782 if (pdev->port_level > bufsize)
783 return (LIBUSB20_ERROR_OVERFLOW);
784
785 /* copy port number information */
786 memcpy(buf, pdev->port_path, pdev->port_level);
787
788 return (pdev->port_level); /* success */
789 }
790
791 uint16_t
libusb20_dev_get_power_usage(struct libusb20_device * pdev)792 libusb20_dev_get_power_usage(struct libusb20_device *pdev)
793 {
794 int error;
795 uint16_t power_usage;
796
797 error = pdev->methods->get_power_usage(pdev, &power_usage);
798 if (error)
799 power_usage = 0;
800 return (power_usage);
801 }
802
803 int
libusb20_dev_set_alt_index(struct libusb20_device * pdev,uint8_t ifaceIndex,uint8_t altIndex)804 libusb20_dev_set_alt_index(struct libusb20_device *pdev, uint8_t ifaceIndex, uint8_t altIndex)
805 {
806 int error;
807
808 error = pdev->methods->set_alt_index(pdev, ifaceIndex, altIndex);
809 return (error);
810 }
811
812 int
libusb20_dev_set_config_index(struct libusb20_device * pdev,uint8_t configIndex)813 libusb20_dev_set_config_index(struct libusb20_device *pdev, uint8_t configIndex)
814 {
815 int error;
816
817 error = pdev->methods->set_config_index(pdev, configIndex);
818 return (error);
819 }
820
821 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)822 libusb20_dev_request_sync(struct libusb20_device *pdev,
823 struct LIBUSB20_CONTROL_SETUP_DECODED *setup, void *data,
824 uint16_t *pactlen, uint32_t timeout, uint8_t flags)
825 {
826 int error;
827
828 error = pdev->methods->do_request_sync(pdev,
829 setup, data, pactlen, timeout, flags);
830 return (error);
831 }
832
833 int
libusb20_dev_req_string_sync(struct libusb20_device * pdev,uint8_t str_index,uint16_t langid,void * ptr,uint16_t len)834 libusb20_dev_req_string_sync(struct libusb20_device *pdev,
835 uint8_t str_index, uint16_t langid, void *ptr, uint16_t len)
836 {
837 struct LIBUSB20_CONTROL_SETUP_DECODED req;
838 int error;
839 int flags;
840
841 /* make sure memory is initialised */
842 memset(ptr, 0, len);
843
844 if (len < 4) {
845 /* invalid length */
846 return (LIBUSB20_ERROR_INVALID_PARAM);
847 }
848 LIBUSB20_INIT(LIBUSB20_CONTROL_SETUP, &req);
849
850 /*
851 * We need to read the USB string in two steps else some USB
852 * devices will complain.
853 */
854 req.bmRequestType =
855 LIBUSB20_REQUEST_TYPE_STANDARD |
856 LIBUSB20_RECIPIENT_DEVICE |
857 LIBUSB20_ENDPOINT_IN;
858 req.bRequest = LIBUSB20_REQUEST_GET_DESCRIPTOR;
859 req.wValue = (LIBUSB20_DT_STRING << 8) | str_index;
860 req.wIndex = langid;
861 req.wLength = 4; /* bytes */
862
863 error = libusb20_dev_request_sync(pdev, &req,
864 ptr, NULL, 1000, LIBUSB20_TRANSFER_SINGLE_SHORT_NOT_OK);
865 if (error) {
866 /* try to request full string */
867 req.wLength = 255;
868 flags = 0;
869 } else {
870 /* extract length and request full string */
871 req.wLength = *(uint8_t *)ptr;
872 flags = LIBUSB20_TRANSFER_SINGLE_SHORT_NOT_OK;
873 }
874 if (req.wLength > len) {
875 /* partial string read */
876 req.wLength = len;
877 }
878 error = libusb20_dev_request_sync(pdev, &req, ptr, NULL, 1000, flags);
879 if (error)
880 return (error);
881
882 if (((uint8_t *)ptr)[1] != LIBUSB20_DT_STRING)
883 return (LIBUSB20_ERROR_OTHER);
884 return (0); /* success */
885 }
886
887 int
libusb20_dev_req_string_simple_sync(struct libusb20_device * pdev,uint8_t str_index,void * ptr,uint16_t len)888 libusb20_dev_req_string_simple_sync(struct libusb20_device *pdev,
889 uint8_t str_index, void *ptr, uint16_t len)
890 {
891 char *buf;
892 int error;
893 uint16_t langid;
894 uint16_t n;
895 uint16_t i;
896 uint16_t c;
897 uint8_t temp[255];
898 uint8_t swap;
899
900 /* the following code derives from the FreeBSD USB kernel */
901
902 if ((len < 1) || (ptr == NULL)) {
903 /* too short buffer */
904 return (LIBUSB20_ERROR_INVALID_PARAM);
905 }
906 error = libusb20_dev_req_string_sync(pdev,
907 0, 0, temp, sizeof(temp));
908 if (error < 0) {
909 *(uint8_t *)ptr = 0; /* zero terminate */
910 return (error);
911 }
912 langid = temp[2] | (temp[3] << 8);
913
914 error = libusb20_dev_req_string_sync(pdev, str_index,
915 langid, temp, sizeof(temp));
916 if (error < 0) {
917 *(uint8_t *)ptr = 0; /* zero terminate */
918 return (error);
919 }
920 if (temp[0] < 2) {
921 /* string length is too short */
922 *(uint8_t *)ptr = 0; /* zero terminate */
923 return (LIBUSB20_ERROR_OTHER);
924 }
925 /* reserve one byte for terminating zero */
926 len--;
927
928 /* find maximum length */
929 n = (temp[0] / 2) - 1;
930 if (n > len) {
931 n = len;
932 }
933 /* reset swap state */
934 swap = 3;
935
936 /* setup output buffer pointer */
937 buf = ptr;
938
939 /* convert and filter */
940 for (i = 0; (i != n); i++) {
941 c = temp[(2 * i) + 2] | (temp[(2 * i) + 3] << 8);
942
943 /* convert from Unicode, handle buggy strings */
944 if (((c & 0xff00) == 0) && (swap & 1)) {
945 /* Little Endian, default */
946 *buf = c;
947 swap = 1;
948 } else if (((c & 0x00ff) == 0) && (swap & 2)) {
949 /* Big Endian */
950 *buf = c >> 8;
951 swap = 2;
952 } else {
953 /* skip invalid character */
954 continue;
955 }
956 /*
957 * Filter by default - we don't allow greater and less than
958 * signs because they might confuse the dmesg printouts!
959 */
960 if ((*buf == '<') || (*buf == '>') || (!isprint(*buf))) {
961 /* skip invalid character */
962 continue;
963 }
964 buf++;
965 }
966 *buf = 0; /* zero terminate string */
967
968 return (0);
969 }
970
971 struct libusb20_config *
libusb20_dev_alloc_config(struct libusb20_device * pdev,uint8_t configIndex)972 libusb20_dev_alloc_config(struct libusb20_device *pdev, uint8_t configIndex)
973 {
974 struct libusb20_config *retval = NULL;
975 uint8_t *ptr;
976 uint16_t len;
977 uint8_t do_close;
978 int error;
979
980 /*
981 * Catch invalid configuration descriptor reads early on to
982 * avoid issues with devices that don't check for a valid USB
983 * configuration read request.
984 */
985 if (configIndex >= pdev->ddesc.bNumConfigurations)
986 return (NULL);
987
988 if (!pdev->is_opened) {
989 error = libusb20_dev_open(pdev, 0);
990 if (error) {
991 return (NULL);
992 }
993 do_close = 1;
994 } else {
995 do_close = 0;
996 }
997 error = pdev->methods->get_config_desc_full(pdev,
998 &ptr, &len, configIndex);
999
1000 if (error) {
1001 goto done;
1002 }
1003 /* parse new config descriptor */
1004 retval = libusb20_parse_config_desc(ptr);
1005
1006 /* free config descriptor */
1007 free(ptr);
1008
1009 done:
1010 if (do_close) {
1011 error = libusb20_dev_close(pdev);
1012 }
1013 return (retval);
1014 }
1015
1016 struct libusb20_device *
libusb20_dev_alloc(void)1017 libusb20_dev_alloc(void)
1018 {
1019 struct libusb20_device *pdev;
1020
1021 pdev = malloc(sizeof(*pdev));
1022 if (pdev == NULL) {
1023 return (NULL);
1024 }
1025 memset(pdev, 0, sizeof(*pdev));
1026
1027 pdev->file = -1;
1028 pdev->file_ctrl = -1;
1029 pdev->methods = &libusb20_dummy_methods;
1030 return (pdev);
1031 }
1032
1033 uint8_t
libusb20_dev_get_config_index(struct libusb20_device * pdev)1034 libusb20_dev_get_config_index(struct libusb20_device *pdev)
1035 {
1036 int error;
1037 uint8_t cfg_index;
1038 uint8_t do_close;
1039
1040 if (!pdev->is_opened) {
1041 error = libusb20_dev_open(pdev, 0);
1042 if (error == 0) {
1043 do_close = 1;
1044 } else {
1045 do_close = 0;
1046 }
1047 } else {
1048 do_close = 0;
1049 }
1050
1051 error = pdev->methods->get_config_index(pdev, &cfg_index);
1052 if (error)
1053 cfg_index = 0xFF; /* current config index */
1054 if (do_close) {
1055 if (libusb20_dev_close(pdev)) {
1056 /* ignore */
1057 }
1058 }
1059 return (cfg_index);
1060 }
1061
1062 uint8_t
libusb20_dev_get_mode(struct libusb20_device * pdev)1063 libusb20_dev_get_mode(struct libusb20_device *pdev)
1064 {
1065 return (pdev->usb_mode);
1066 }
1067
1068 uint8_t
libusb20_dev_get_speed(struct libusb20_device * pdev)1069 libusb20_dev_get_speed(struct libusb20_device *pdev)
1070 {
1071 return (pdev->usb_speed);
1072 }
1073
1074 int
libusb20_dev_get_stats(struct libusb20_device * pdev,struct libusb20_device_stats * pstats)1075 libusb20_dev_get_stats(struct libusb20_device *pdev, struct libusb20_device_stats *pstats)
1076 {
1077 uint8_t do_close;
1078 int error;
1079
1080 if (!pdev->is_opened) {
1081 error = libusb20_dev_open(pdev, 0);
1082 if (error == 0) {
1083 do_close = 1;
1084 } else {
1085 do_close = 0;
1086 }
1087 } else {
1088 do_close = 0;
1089 }
1090
1091 error = pdev->methods->get_stats(pdev, pstats);
1092
1093 if (do_close)
1094 (void) libusb20_dev_close(pdev);
1095
1096 return (error);
1097 }
1098
1099 /* if this function returns an error, the device is gone */
1100 int
libusb20_dev_process(struct libusb20_device * pdev)1101 libusb20_dev_process(struct libusb20_device *pdev)
1102 {
1103 int error;
1104
1105 error = pdev->methods->process(pdev);
1106 return (error);
1107 }
1108
1109 void
libusb20_dev_wait_process(struct libusb20_device * pdev,int timeout)1110 libusb20_dev_wait_process(struct libusb20_device *pdev, int timeout)
1111 {
1112 struct pollfd pfd[1];
1113
1114 if (!pdev->is_opened) {
1115 return;
1116 }
1117 pfd[0].fd = pdev->file;
1118 pfd[0].events = (POLLIN | POLLOUT | POLLRDNORM | POLLWRNORM);
1119 pfd[0].revents = 0;
1120
1121 if (poll(pfd, 1, timeout)) {
1122 /* ignore any error */
1123 }
1124 return;
1125 }
1126
1127 void
libusb20_dev_free(struct libusb20_device * pdev)1128 libusb20_dev_free(struct libusb20_device *pdev)
1129 {
1130 if (pdev == NULL) {
1131 /* be NULL safe */
1132 return;
1133 }
1134 if (pdev->is_opened) {
1135 if (libusb20_dev_close(pdev)) {
1136 /* ignore any errors */
1137 }
1138 }
1139 free(pdev);
1140 return;
1141 }
1142
1143 int
libusb20_dev_get_info(struct libusb20_device * pdev,struct usb_device_info * pinfo)1144 libusb20_dev_get_info(struct libusb20_device *pdev,
1145 struct usb_device_info *pinfo)
1146 {
1147 if (pinfo == NULL)
1148 return (LIBUSB20_ERROR_INVALID_PARAM);
1149
1150 return (pdev->beMethods->dev_get_info(pdev, pinfo));
1151 }
1152
1153 const char *
libusb20_dev_get_backend_name(struct libusb20_device * pdev)1154 libusb20_dev_get_backend_name(struct libusb20_device *pdev)
1155 {
1156 return (pdev->beMethods->get_backend_name());
1157 }
1158
1159 const char *
libusb20_dev_get_desc(struct libusb20_device * pdev)1160 libusb20_dev_get_desc(struct libusb20_device *pdev)
1161 {
1162 return (pdev->usb_desc);
1163 }
1164
1165 void
libusb20_dev_set_debug(struct libusb20_device * pdev,int debug)1166 libusb20_dev_set_debug(struct libusb20_device *pdev, int debug)
1167 {
1168 pdev->debug = debug;
1169 return;
1170 }
1171
1172 int
libusb20_dev_get_debug(struct libusb20_device * pdev)1173 libusb20_dev_get_debug(struct libusb20_device *pdev)
1174 {
1175 return (pdev->debug);
1176 }
1177
1178 uint8_t
libusb20_dev_get_address(struct libusb20_device * pdev)1179 libusb20_dev_get_address(struct libusb20_device *pdev)
1180 {
1181 return (pdev->device_address);
1182 }
1183
1184 uint8_t
libusb20_dev_get_parent_address(struct libusb20_device * pdev)1185 libusb20_dev_get_parent_address(struct libusb20_device *pdev)
1186 {
1187 return (pdev->parent_address);
1188 }
1189
1190 uint8_t
libusb20_dev_get_parent_port(struct libusb20_device * pdev)1191 libusb20_dev_get_parent_port(struct libusb20_device *pdev)
1192 {
1193 return (pdev->parent_port);
1194 }
1195
1196 uint8_t
libusb20_dev_get_bus_number(struct libusb20_device * pdev)1197 libusb20_dev_get_bus_number(struct libusb20_device *pdev)
1198 {
1199 return (pdev->bus_number);
1200 }
1201
1202 int
libusb20_dev_get_iface_desc(struct libusb20_device * pdev,uint8_t iface_index,char * buf,uint8_t len)1203 libusb20_dev_get_iface_desc(struct libusb20_device *pdev,
1204 uint8_t iface_index, char *buf, uint8_t len)
1205 {
1206 if ((buf == NULL) || (len == 0))
1207 return (LIBUSB20_ERROR_INVALID_PARAM);
1208
1209 buf[0] = 0; /* set default string value */
1210
1211 return (pdev->beMethods->dev_get_iface_desc(
1212 pdev, iface_index, buf, len));
1213 }
1214
1215 /* USB backend operations */
1216
1217 int
libusb20_be_get_dev_quirk(struct libusb20_backend * pbe,uint16_t quirk_index,struct libusb20_quirk * pq)1218 libusb20_be_get_dev_quirk(struct libusb20_backend *pbe,
1219 uint16_t quirk_index, struct libusb20_quirk *pq)
1220 {
1221 return (pbe->methods->root_get_dev_quirk(pbe, quirk_index, pq));
1222 }
1223
1224 int
libusb20_be_get_quirk_name(struct libusb20_backend * pbe,uint16_t quirk_index,struct libusb20_quirk * pq)1225 libusb20_be_get_quirk_name(struct libusb20_backend *pbe,
1226 uint16_t quirk_index, struct libusb20_quirk *pq)
1227 {
1228 return (pbe->methods->root_get_quirk_name(pbe, quirk_index, pq));
1229 }
1230
1231 int
libusb20_be_add_dev_quirk(struct libusb20_backend * pbe,struct libusb20_quirk * pq)1232 libusb20_be_add_dev_quirk(struct libusb20_backend *pbe,
1233 struct libusb20_quirk *pq)
1234 {
1235 return (pbe->methods->root_add_dev_quirk(pbe, pq));
1236 }
1237
1238 int
libusb20_be_remove_dev_quirk(struct libusb20_backend * pbe,struct libusb20_quirk * pq)1239 libusb20_be_remove_dev_quirk(struct libusb20_backend *pbe,
1240 struct libusb20_quirk *pq)
1241 {
1242 return (pbe->methods->root_remove_dev_quirk(pbe, pq));
1243 }
1244
1245 int
libusb20_be_set_template(struct libusb20_backend * pbe,int temp)1246 libusb20_be_set_template(struct libusb20_backend *pbe, int temp)
1247 {
1248 return (pbe->methods->root_set_template(pbe, temp));
1249 }
1250
1251 int
libusb20_be_get_template(struct libusb20_backend * pbe,int * ptemp)1252 libusb20_be_get_template(struct libusb20_backend *pbe, int *ptemp)
1253 {
1254 int temp;
1255
1256 if (ptemp == NULL)
1257 ptemp = &temp;
1258
1259 return (pbe->methods->root_get_template(pbe, ptemp));
1260 }
1261
1262 struct libusb20_device *
libusb20_be_device_foreach(struct libusb20_backend * pbe,struct libusb20_device * pdev)1263 libusb20_be_device_foreach(struct libusb20_backend *pbe, struct libusb20_device *pdev)
1264 {
1265 if (pbe == NULL) {
1266 pdev = NULL;
1267 } else if (pdev == NULL) {
1268 pdev = TAILQ_FIRST(&(pbe->usb_devs));
1269 } else {
1270 pdev = TAILQ_NEXT(pdev, dev_entry);
1271 }
1272 return (pdev);
1273 }
1274
1275 struct libusb20_backend *
libusb20_be_alloc(const struct libusb20_backend_methods * methods)1276 libusb20_be_alloc(const struct libusb20_backend_methods *methods)
1277 {
1278 struct libusb20_backend *pbe;
1279
1280 pbe = malloc(sizeof(*pbe));
1281 if (pbe == NULL) {
1282 return (NULL);
1283 }
1284 memset(pbe, 0, sizeof(*pbe));
1285
1286 TAILQ_INIT(&(pbe->usb_devs));
1287
1288 pbe->methods = methods; /* set backend methods */
1289
1290 /* do the initial device scan */
1291 if (pbe->methods->init_backend) {
1292 pbe->methods->init_backend(pbe);
1293 }
1294 return (pbe);
1295 }
1296
1297 struct libusb20_backend *
libusb20_be_alloc_linux(void)1298 libusb20_be_alloc_linux(void)
1299 {
1300 return (NULL);
1301 }
1302
1303 struct libusb20_backend *
libusb20_be_alloc_ugen20(void)1304 libusb20_be_alloc_ugen20(void)
1305 {
1306 return (libusb20_be_alloc(&libusb20_ugen20_backend));
1307 }
1308
1309 struct libusb20_backend *
libusb20_be_alloc_default(void)1310 libusb20_be_alloc_default(void)
1311 {
1312 struct libusb20_backend *pbe;
1313
1314 #ifdef __linux__
1315 pbe = libusb20_be_alloc_linux();
1316 if (pbe) {
1317 return (pbe);
1318 }
1319 #endif
1320 pbe = libusb20_be_alloc_ugen20();
1321 if (pbe) {
1322 return (pbe);
1323 }
1324 return (NULL); /* no backend found */
1325 }
1326
1327 void
libusb20_be_free(struct libusb20_backend * pbe)1328 libusb20_be_free(struct libusb20_backend *pbe)
1329 {
1330 struct libusb20_device *pdev;
1331
1332 if (pbe == NULL) {
1333 /* be NULL safe */
1334 return;
1335 }
1336 while ((pdev = libusb20_be_device_foreach(pbe, NULL))) {
1337 libusb20_be_dequeue_device(pbe, pdev);
1338 libusb20_dev_free(pdev);
1339 }
1340 if (pbe->methods->exit_backend) {
1341 pbe->methods->exit_backend(pbe);
1342 }
1343 /* free backend */
1344 free(pbe);
1345 }
1346
1347 void
libusb20_be_enqueue_device(struct libusb20_backend * pbe,struct libusb20_device * pdev)1348 libusb20_be_enqueue_device(struct libusb20_backend *pbe, struct libusb20_device *pdev)
1349 {
1350 pdev->beMethods = pbe->methods; /* copy backend methods */
1351 TAILQ_INSERT_TAIL(&(pbe->usb_devs), pdev, dev_entry);
1352 }
1353
1354 void
libusb20_be_dequeue_device(struct libusb20_backend * pbe,struct libusb20_device * pdev)1355 libusb20_be_dequeue_device(struct libusb20_backend *pbe,
1356 struct libusb20_device *pdev)
1357 {
1358 TAILQ_REMOVE(&(pbe->usb_devs), pdev, dev_entry);
1359 }
1360
1361 const char *
libusb20_strerror(int code)1362 libusb20_strerror(int code)
1363 {
1364 switch (code) {
1365 case LIBUSB20_SUCCESS:
1366 return ("Success");
1367 case LIBUSB20_ERROR_IO:
1368 return ("I/O error");
1369 case LIBUSB20_ERROR_INVALID_PARAM:
1370 return ("Invalid parameter");
1371 case LIBUSB20_ERROR_ACCESS:
1372 return ("Permissions error");
1373 case LIBUSB20_ERROR_NO_DEVICE:
1374 return ("No device");
1375 case LIBUSB20_ERROR_NOT_FOUND:
1376 return ("Not found");
1377 case LIBUSB20_ERROR_BUSY:
1378 return ("Device busy");
1379 case LIBUSB20_ERROR_TIMEOUT:
1380 return ("Timeout");
1381 case LIBUSB20_ERROR_OVERFLOW:
1382 return ("Overflow");
1383 case LIBUSB20_ERROR_PIPE:
1384 return ("Pipe error");
1385 case LIBUSB20_ERROR_INTERRUPTED:
1386 return ("Interrupted");
1387 case LIBUSB20_ERROR_NO_MEM:
1388 return ("Out of memory");
1389 case LIBUSB20_ERROR_NOT_SUPPORTED:
1390 return ("Not supported");
1391 case LIBUSB20_ERROR_OTHER:
1392 return ("Other error");
1393 default:
1394 return ("Unknown error");
1395 }
1396 }
1397
1398 const char *
libusb20_error_name(int code)1399 libusb20_error_name(int code)
1400 {
1401 switch (code) {
1402 case LIBUSB20_SUCCESS:
1403 return ("LIBUSB20_SUCCESS");
1404 case LIBUSB20_ERROR_IO:
1405 return ("LIBUSB20_ERROR_IO");
1406 case LIBUSB20_ERROR_INVALID_PARAM:
1407 return ("LIBUSB20_ERROR_INVALID_PARAM");
1408 case LIBUSB20_ERROR_ACCESS:
1409 return ("LIBUSB20_ERROR_ACCESS");
1410 case LIBUSB20_ERROR_NO_DEVICE:
1411 return ("LIBUSB20_ERROR_NO_DEVICE");
1412 case LIBUSB20_ERROR_NOT_FOUND:
1413 return ("LIBUSB20_ERROR_NOT_FOUND");
1414 case LIBUSB20_ERROR_BUSY:
1415 return ("LIBUSB20_ERROR_BUSY");
1416 case LIBUSB20_ERROR_TIMEOUT:
1417 return ("LIBUSB20_ERROR_TIMEOUT");
1418 case LIBUSB20_ERROR_OVERFLOW:
1419 return ("LIBUSB20_ERROR_OVERFLOW");
1420 case LIBUSB20_ERROR_PIPE:
1421 return ("LIBUSB20_ERROR_PIPE");
1422 case LIBUSB20_ERROR_INTERRUPTED:
1423 return ("LIBUSB20_ERROR_INTERRUPTED");
1424 case LIBUSB20_ERROR_NO_MEM:
1425 return ("LIBUSB20_ERROR_NO_MEM");
1426 case LIBUSB20_ERROR_NOT_SUPPORTED:
1427 return ("LIBUSB20_ERROR_NOT_SUPPORTED");
1428 case LIBUSB20_ERROR_OTHER:
1429 return ("LIBUSB20_ERROR_OTHER");
1430 default:
1431 return ("LIBUSB20_ERROR_UNKNOWN");
1432 }
1433 }
1434