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1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * Copyright (c) 2006-2008 Daniel Mack, Karsten Wiese
4*/
5
6#include <linux/device.h>
7#include <linux/spinlock.h>
8#include <linux/slab.h>
9#include <linux/init.h>
10#include <linux/usb.h>
11#include <sound/core.h>
12#include <sound/pcm.h>
13
14#include "device.h"
15#include "audio.h"
16
17#define N_URBS 32
18#define CLOCK_DRIFT_TOLERANCE 5
19#define FRAMES_PER_URB 8
20#define BYTES_PER_FRAME 512
21#define CHANNELS_PER_STREAM 2
22#define BYTES_PER_SAMPLE 3
23#define BYTES_PER_SAMPLE_USB 4
24#define MAX_BUFFER_SIZE (128*1024)
25#define MAX_ENDPOINT_SIZE 512
26
27#define ENDPOINT_CAPTURE 2
28#define ENDPOINT_PLAYBACK 6
29
30#define MAKE_CHECKBYTE(cdev,stream,i) \
31 (stream << 1) | (~(i / (cdev->n_streams * BYTES_PER_SAMPLE_USB)) & 1)
32
33static const struct snd_pcm_hardware snd_usb_caiaq_pcm_hardware = {
34 .info = (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
35 SNDRV_PCM_INFO_BLOCK_TRANSFER),
36 .formats = SNDRV_PCM_FMTBIT_S24_3BE,
37 .rates = (SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000 |
38 SNDRV_PCM_RATE_96000),
39 .rate_min = 44100,
40 .rate_max = 0, /* will overwrite later */
41 .channels_min = CHANNELS_PER_STREAM,
42 .channels_max = CHANNELS_PER_STREAM,
43 .buffer_bytes_max = MAX_BUFFER_SIZE,
44 .period_bytes_min = 128,
45 .period_bytes_max = MAX_BUFFER_SIZE,
46 .periods_min = 1,
47 .periods_max = 1024,
48};
49
50static void
51activate_substream(struct snd_usb_caiaqdev *cdev,
52 struct snd_pcm_substream *sub)
53{
54 spin_lock(&cdev->spinlock);
55
56 if (sub->stream == SNDRV_PCM_STREAM_PLAYBACK)
57 cdev->sub_playback[sub->number] = sub;
58 else
59 cdev->sub_capture[sub->number] = sub;
60
61 spin_unlock(&cdev->spinlock);
62}
63
64static void
65deactivate_substream(struct snd_usb_caiaqdev *cdev,
66 struct snd_pcm_substream *sub)
67{
68 unsigned long flags;
69 spin_lock_irqsave(&cdev->spinlock, flags);
70
71 if (sub->stream == SNDRV_PCM_STREAM_PLAYBACK)
72 cdev->sub_playback[sub->number] = NULL;
73 else
74 cdev->sub_capture[sub->number] = NULL;
75
76 spin_unlock_irqrestore(&cdev->spinlock, flags);
77}
78
79static int
80all_substreams_zero(struct snd_pcm_substream **subs)
81{
82 int i;
83 for (i = 0; i < MAX_STREAMS; i++)
84 if (subs[i] != NULL)
85 return 0;
86 return 1;
87}
88
89static int stream_start(struct snd_usb_caiaqdev *cdev)
90{
91 int i, ret;
92 struct device *dev = caiaqdev_to_dev(cdev);
93
94 dev_dbg(dev, "%s(%p)\n", __func__, cdev);
95
96 if (cdev->streaming)
97 return -EINVAL;
98
99 memset(cdev->sub_playback, 0, sizeof(cdev->sub_playback));
100 memset(cdev->sub_capture, 0, sizeof(cdev->sub_capture));
101 cdev->input_panic = 0;
102 cdev->output_panic = 0;
103 cdev->first_packet = 4;
104 cdev->streaming = 1;
105 cdev->warned = 0;
106
107 for (i = 0; i < N_URBS; i++) {
108 ret = usb_submit_urb(cdev->data_urbs_in[i], GFP_ATOMIC);
109 if (ret) {
110 dev_err(dev, "unable to trigger read #%d! (ret %d)\n",
111 i, ret);
112 cdev->streaming = 0;
113 return -EPIPE;
114 }
115 }
116
117 return 0;
118}
119
120static void stream_stop(struct snd_usb_caiaqdev *cdev)
121{
122 int i;
123 struct device *dev = caiaqdev_to_dev(cdev);
124
125 dev_dbg(dev, "%s(%p)\n", __func__, cdev);
126 if (!cdev->streaming)
127 return;
128
129 cdev->streaming = 0;
130
131 for (i = 0; i < N_URBS; i++) {
132 usb_kill_urb(cdev->data_urbs_in[i]);
133
134 if (test_bit(i, &cdev->outurb_active_mask))
135 usb_kill_urb(cdev->data_urbs_out[i]);
136 }
137
138 cdev->outurb_active_mask = 0;
139}
140
141static int snd_usb_caiaq_substream_open(struct snd_pcm_substream *substream)
142{
143 struct snd_usb_caiaqdev *cdev = snd_pcm_substream_chip(substream);
144 struct device *dev = caiaqdev_to_dev(cdev);
145
146 dev_dbg(dev, "%s(%p)\n", __func__, substream);
147 substream->runtime->hw = cdev->pcm_info;
148 snd_pcm_limit_hw_rates(substream->runtime);
149
150 return 0;
151}
152
153static int snd_usb_caiaq_substream_close(struct snd_pcm_substream *substream)
154{
155 struct snd_usb_caiaqdev *cdev = snd_pcm_substream_chip(substream);
156 struct device *dev = caiaqdev_to_dev(cdev);
157
158 dev_dbg(dev, "%s(%p)\n", __func__, substream);
159 if (all_substreams_zero(cdev->sub_playback) &&
160 all_substreams_zero(cdev->sub_capture)) {
161 /* when the last client has stopped streaming,
162 * all sample rates are allowed again */
163 stream_stop(cdev);
164 cdev->pcm_info.rates = cdev->samplerates;
165 }
166
167 return 0;
168}
169
170static int snd_usb_caiaq_pcm_hw_free(struct snd_pcm_substream *sub)
171{
172 struct snd_usb_caiaqdev *cdev = snd_pcm_substream_chip(sub);
173 deactivate_substream(cdev, sub);
174 return 0;
175}
176
177/* this should probably go upstream */
178#if SNDRV_PCM_RATE_5512 != 1 << 0 || SNDRV_PCM_RATE_192000 != 1 << 12
179#error "Change this table"
180#endif
181
182static const unsigned int rates[] = { 5512, 8000, 11025, 16000, 22050, 32000, 44100,
183 48000, 64000, 88200, 96000, 176400, 192000 };
184
185static int snd_usb_caiaq_pcm_prepare(struct snd_pcm_substream *substream)
186{
187 int bytes_per_sample, bpp, ret, i;
188 int index = substream->number;
189 struct snd_usb_caiaqdev *cdev = snd_pcm_substream_chip(substream);
190 struct snd_pcm_runtime *runtime = substream->runtime;
191 struct device *dev = caiaqdev_to_dev(cdev);
192
193 dev_dbg(dev, "%s(%p)\n", __func__, substream);
194
195 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
196 int out_pos;
197
198 switch (cdev->spec.data_alignment) {
199 case 0:
200 case 2:
201 out_pos = BYTES_PER_SAMPLE + 1;
202 break;
203 case 3:
204 default:
205 out_pos = 0;
206 break;
207 }
208
209 cdev->period_out_count[index] = out_pos;
210 cdev->audio_out_buf_pos[index] = out_pos;
211 } else {
212 int in_pos;
213
214 switch (cdev->spec.data_alignment) {
215 case 0:
216 in_pos = BYTES_PER_SAMPLE + 2;
217 break;
218 case 2:
219 in_pos = BYTES_PER_SAMPLE;
220 break;
221 case 3:
222 default:
223 in_pos = 0;
224 break;
225 }
226
227 cdev->period_in_count[index] = in_pos;
228 cdev->audio_in_buf_pos[index] = in_pos;
229 }
230
231 if (cdev->streaming)
232 return 0;
233
234 /* the first client that opens a stream defines the sample rate
235 * setting for all subsequent calls, until the last client closed. */
236 for (i=0; i < ARRAY_SIZE(rates); i++)
237 if (runtime->rate == rates[i])
238 cdev->pcm_info.rates = 1 << i;
239
240 snd_pcm_limit_hw_rates(runtime);
241
242 bytes_per_sample = BYTES_PER_SAMPLE;
243 if (cdev->spec.data_alignment >= 2)
244 bytes_per_sample++;
245
246 bpp = ((runtime->rate / 8000) + CLOCK_DRIFT_TOLERANCE)
247 * bytes_per_sample * CHANNELS_PER_STREAM * cdev->n_streams;
248
249 if (bpp > MAX_ENDPOINT_SIZE)
250 bpp = MAX_ENDPOINT_SIZE;
251
252 ret = snd_usb_caiaq_set_audio_params(cdev, runtime->rate,
253 runtime->sample_bits, bpp);
254 if (ret)
255 return ret;
256
257 ret = stream_start(cdev);
258 if (ret)
259 return ret;
260
261 cdev->output_running = 0;
262 wait_event_timeout(cdev->prepare_wait_queue, cdev->output_running, HZ);
263 if (!cdev->output_running) {
264 stream_stop(cdev);
265 return -EPIPE;
266 }
267
268 return 0;
269}
270
271static int snd_usb_caiaq_pcm_trigger(struct snd_pcm_substream *sub, int cmd)
272{
273 struct snd_usb_caiaqdev *cdev = snd_pcm_substream_chip(sub);
274 struct device *dev = caiaqdev_to_dev(cdev);
275
276 dev_dbg(dev, "%s(%p) cmd %d\n", __func__, sub, cmd);
277
278 switch (cmd) {
279 case SNDRV_PCM_TRIGGER_START:
280 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
281 activate_substream(cdev, sub);
282 break;
283 case SNDRV_PCM_TRIGGER_STOP:
284 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
285 deactivate_substream(cdev, sub);
286 break;
287 default:
288 return -EINVAL;
289 }
290
291 return 0;
292}
293
294static snd_pcm_uframes_t
295snd_usb_caiaq_pcm_pointer(struct snd_pcm_substream *sub)
296{
297 int index = sub->number;
298 struct snd_usb_caiaqdev *cdev = snd_pcm_substream_chip(sub);
299 snd_pcm_uframes_t ptr;
300
301 spin_lock(&cdev->spinlock);
302
303 if (cdev->input_panic || cdev->output_panic) {
304 ptr = SNDRV_PCM_POS_XRUN;
305 goto unlock;
306 }
307
308 if (sub->stream == SNDRV_PCM_STREAM_PLAYBACK)
309 ptr = bytes_to_frames(sub->runtime,
310 cdev->audio_out_buf_pos[index]);
311 else
312 ptr = bytes_to_frames(sub->runtime,
313 cdev->audio_in_buf_pos[index]);
314
315unlock:
316 spin_unlock(&cdev->spinlock);
317 return ptr;
318}
319
320/* operators for both playback and capture */
321static const struct snd_pcm_ops snd_usb_caiaq_ops = {
322 .open = snd_usb_caiaq_substream_open,
323 .close = snd_usb_caiaq_substream_close,
324 .hw_free = snd_usb_caiaq_pcm_hw_free,
325 .prepare = snd_usb_caiaq_pcm_prepare,
326 .trigger = snd_usb_caiaq_pcm_trigger,
327 .pointer = snd_usb_caiaq_pcm_pointer,
328};
329
330static void check_for_elapsed_periods(struct snd_usb_caiaqdev *cdev,
331 struct snd_pcm_substream **subs)
332{
333 int stream, pb, *cnt;
334 struct snd_pcm_substream *sub;
335
336 for (stream = 0; stream < cdev->n_streams; stream++) {
337 sub = subs[stream];
338 if (!sub)
339 continue;
340
341 pb = snd_pcm_lib_period_bytes(sub);
342 cnt = (sub->stream == SNDRV_PCM_STREAM_PLAYBACK) ?
343 &cdev->period_out_count[stream] :
344 &cdev->period_in_count[stream];
345
346 if (*cnt >= pb) {
347 snd_pcm_period_elapsed(sub);
348 *cnt %= pb;
349 }
350 }
351}
352
353static void read_in_urb_mode0(struct snd_usb_caiaqdev *cdev,
354 const struct urb *urb,
355 const struct usb_iso_packet_descriptor *iso)
356{
357 unsigned char *usb_buf = urb->transfer_buffer + iso->offset;
358 struct snd_pcm_substream *sub;
359 int stream, i;
360
361 if (all_substreams_zero(cdev->sub_capture))
362 return;
363
364 for (i = 0; i < iso->actual_length;) {
365 for (stream = 0; stream < cdev->n_streams; stream++, i++) {
366 sub = cdev->sub_capture[stream];
367 if (sub) {
368 struct snd_pcm_runtime *rt = sub->runtime;
369 char *audio_buf = rt->dma_area;
370 int sz = frames_to_bytes(rt, rt->buffer_size);
371 audio_buf[cdev->audio_in_buf_pos[stream]++]
372 = usb_buf[i];
373 cdev->period_in_count[stream]++;
374 if (cdev->audio_in_buf_pos[stream] == sz)
375 cdev->audio_in_buf_pos[stream] = 0;
376 }
377 }
378 }
379}
380
381static void read_in_urb_mode2(struct snd_usb_caiaqdev *cdev,
382 const struct urb *urb,
383 const struct usb_iso_packet_descriptor *iso)
384{
385 unsigned char *usb_buf = urb->transfer_buffer + iso->offset;
386 unsigned char check_byte;
387 struct snd_pcm_substream *sub;
388 int stream, i;
389
390 for (i = 0; i < iso->actual_length;) {
391 if (i % (cdev->n_streams * BYTES_PER_SAMPLE_USB) == 0) {
392 for (stream = 0;
393 stream < cdev->n_streams;
394 stream++, i++) {
395 if (cdev->first_packet)
396 continue;
397
398 check_byte = MAKE_CHECKBYTE(cdev, stream, i);
399
400 if ((usb_buf[i] & 0x3f) != check_byte)
401 cdev->input_panic = 1;
402
403 if (usb_buf[i] & 0x80)
404 cdev->output_panic = 1;
405 }
406 }
407 cdev->first_packet = 0;
408
409 for (stream = 0; stream < cdev->n_streams; stream++, i++) {
410 sub = cdev->sub_capture[stream];
411 if (cdev->input_panic)
412 usb_buf[i] = 0;
413
414 if (sub) {
415 struct snd_pcm_runtime *rt = sub->runtime;
416 char *audio_buf = rt->dma_area;
417 int sz = frames_to_bytes(rt, rt->buffer_size);
418 audio_buf[cdev->audio_in_buf_pos[stream]++] =
419 usb_buf[i];
420 cdev->period_in_count[stream]++;
421 if (cdev->audio_in_buf_pos[stream] == sz)
422 cdev->audio_in_buf_pos[stream] = 0;
423 }
424 }
425 }
426}
427
428static void read_in_urb_mode3(struct snd_usb_caiaqdev *cdev,
429 const struct urb *urb,
430 const struct usb_iso_packet_descriptor *iso)
431{
432 unsigned char *usb_buf = urb->transfer_buffer + iso->offset;
433 struct device *dev = caiaqdev_to_dev(cdev);
434 int stream, i;
435
436 /* paranoia check */
437 if (iso->actual_length % (BYTES_PER_SAMPLE_USB * CHANNELS_PER_STREAM))
438 return;
439
440 for (i = 0; i < iso->actual_length;) {
441 for (stream = 0; stream < cdev->n_streams; stream++) {
442 struct snd_pcm_substream *sub = cdev->sub_capture[stream];
443 char *audio_buf = NULL;
444 int c, n, sz = 0;
445
446 if (sub && !cdev->input_panic) {
447 struct snd_pcm_runtime *rt = sub->runtime;
448 audio_buf = rt->dma_area;
449 sz = frames_to_bytes(rt, rt->buffer_size);
450 }
451
452 for (c = 0; c < CHANNELS_PER_STREAM; c++) {
453 /* 3 audio data bytes, followed by 1 check byte */
454 if (audio_buf) {
455 for (n = 0; n < BYTES_PER_SAMPLE; n++) {
456 audio_buf[cdev->audio_in_buf_pos[stream]++] = usb_buf[i+n];
457
458 if (cdev->audio_in_buf_pos[stream] == sz)
459 cdev->audio_in_buf_pos[stream] = 0;
460 }
461
462 cdev->period_in_count[stream] += BYTES_PER_SAMPLE;
463 }
464
465 i += BYTES_PER_SAMPLE;
466
467 if (usb_buf[i] != ((stream << 1) | c) &&
468 !cdev->first_packet) {
469 if (!cdev->input_panic)
470 dev_warn(dev, " EXPECTED: %02x got %02x, c %d, stream %d, i %d\n",
471 ((stream << 1) | c), usb_buf[i], c, stream, i);
472 cdev->input_panic = 1;
473 }
474
475 i++;
476 }
477 }
478 }
479
480 if (cdev->first_packet > 0)
481 cdev->first_packet--;
482}
483
484static void read_in_urb(struct snd_usb_caiaqdev *cdev,
485 const struct urb *urb,
486 const struct usb_iso_packet_descriptor *iso)
487{
488 struct device *dev = caiaqdev_to_dev(cdev);
489
490 if (!cdev->streaming)
491 return;
492
493 if (iso->actual_length < cdev->bpp)
494 return;
495
496 switch (cdev->spec.data_alignment) {
497 case 0:
498 read_in_urb_mode0(cdev, urb, iso);
499 break;
500 case 2:
501 read_in_urb_mode2(cdev, urb, iso);
502 break;
503 case 3:
504 read_in_urb_mode3(cdev, urb, iso);
505 break;
506 }
507
508 if ((cdev->input_panic || cdev->output_panic) && !cdev->warned) {
509 dev_warn(dev, "streaming error detected %s %s\n",
510 cdev->input_panic ? "(input)" : "",
511 cdev->output_panic ? "(output)" : "");
512 cdev->warned = 1;
513 }
514}
515
516static void fill_out_urb_mode_0(struct snd_usb_caiaqdev *cdev,
517 struct urb *urb,
518 const struct usb_iso_packet_descriptor *iso)
519{
520 unsigned char *usb_buf = urb->transfer_buffer + iso->offset;
521 struct snd_pcm_substream *sub;
522 int stream, i;
523
524 for (i = 0; i < iso->length;) {
525 for (stream = 0; stream < cdev->n_streams; stream++, i++) {
526 sub = cdev->sub_playback[stream];
527 if (sub) {
528 struct snd_pcm_runtime *rt = sub->runtime;
529 char *audio_buf = rt->dma_area;
530 int sz = frames_to_bytes(rt, rt->buffer_size);
531 usb_buf[i] =
532 audio_buf[cdev->audio_out_buf_pos[stream]];
533 cdev->period_out_count[stream]++;
534 cdev->audio_out_buf_pos[stream]++;
535 if (cdev->audio_out_buf_pos[stream] == sz)
536 cdev->audio_out_buf_pos[stream] = 0;
537 } else
538 usb_buf[i] = 0;
539 }
540
541 /* fill in the check bytes */
542 if (cdev->spec.data_alignment == 2 &&
543 i % (cdev->n_streams * BYTES_PER_SAMPLE_USB) ==
544 (cdev->n_streams * CHANNELS_PER_STREAM))
545 for (stream = 0; stream < cdev->n_streams; stream++, i++)
546 usb_buf[i] = MAKE_CHECKBYTE(cdev, stream, i);
547 }
548}
549
550static void fill_out_urb_mode_3(struct snd_usb_caiaqdev *cdev,
551 struct urb *urb,
552 const struct usb_iso_packet_descriptor *iso)
553{
554 unsigned char *usb_buf = urb->transfer_buffer + iso->offset;
555 int stream, i;
556
557 for (i = 0; i < iso->length;) {
558 for (stream = 0; stream < cdev->n_streams; stream++) {
559 struct snd_pcm_substream *sub = cdev->sub_playback[stream];
560 char *audio_buf = NULL;
561 int c, n, sz = 0;
562
563 if (sub) {
564 struct snd_pcm_runtime *rt = sub->runtime;
565 audio_buf = rt->dma_area;
566 sz = frames_to_bytes(rt, rt->buffer_size);
567 }
568
569 for (c = 0; c < CHANNELS_PER_STREAM; c++) {
570 for (n = 0; n < BYTES_PER_SAMPLE; n++) {
571 if (audio_buf) {
572 usb_buf[i+n] = audio_buf[cdev->audio_out_buf_pos[stream]++];
573
574 if (cdev->audio_out_buf_pos[stream] == sz)
575 cdev->audio_out_buf_pos[stream] = 0;
576 } else {
577 usb_buf[i+n] = 0;
578 }
579 }
580
581 if (audio_buf)
582 cdev->period_out_count[stream] += BYTES_PER_SAMPLE;
583
584 i += BYTES_PER_SAMPLE;
585
586 /* fill in the check byte pattern */
587 usb_buf[i++] = (stream << 1) | c;
588 }
589 }
590 }
591}
592
593static inline void fill_out_urb(struct snd_usb_caiaqdev *cdev,
594 struct urb *urb,
595 const struct usb_iso_packet_descriptor *iso)
596{
597 switch (cdev->spec.data_alignment) {
598 case 0:
599 case 2:
600 fill_out_urb_mode_0(cdev, urb, iso);
601 break;
602 case 3:
603 fill_out_urb_mode_3(cdev, urb, iso);
604 break;
605 }
606}
607
608static void read_completed(struct urb *urb)
609{
610 struct snd_usb_caiaq_cb_info *info = urb->context;
611 struct snd_usb_caiaqdev *cdev;
612 struct device *dev;
613 struct urb *out = NULL;
614 int i, frame, len, send_it = 0, outframe = 0;
615 unsigned long flags;
616 size_t offset = 0;
617
618 if (urb->status || !info)
619 return;
620
621 cdev = info->cdev;
622 dev = caiaqdev_to_dev(cdev);
623
624 if (!cdev->streaming)
625 return;
626
627 /* find an unused output urb that is unused */
628 for (i = 0; i < N_URBS; i++)
629 if (test_and_set_bit(i, &cdev->outurb_active_mask) == 0) {
630 out = cdev->data_urbs_out[i];
631 break;
632 }
633
634 if (!out) {
635 dev_err(dev, "Unable to find an output urb to use\n");
636 goto requeue;
637 }
638
639 /* read the recently received packet and send back one which has
640 * the same layout */
641 for (frame = 0; frame < FRAMES_PER_URB; frame++) {
642 if (urb->iso_frame_desc[frame].status)
643 continue;
644
645 len = urb->iso_frame_desc[outframe].actual_length;
646 out->iso_frame_desc[outframe].length = len;
647 out->iso_frame_desc[outframe].actual_length = 0;
648 out->iso_frame_desc[outframe].offset = offset;
649 offset += len;
650
651 if (len > 0) {
652 spin_lock_irqsave(&cdev->spinlock, flags);
653 fill_out_urb(cdev, out, &out->iso_frame_desc[outframe]);
654 read_in_urb(cdev, urb, &urb->iso_frame_desc[frame]);
655 spin_unlock_irqrestore(&cdev->spinlock, flags);
656 check_for_elapsed_periods(cdev, cdev->sub_playback);
657 check_for_elapsed_periods(cdev, cdev->sub_capture);
658 send_it = 1;
659 }
660
661 outframe++;
662 }
663
664 if (send_it) {
665 out->number_of_packets = outframe;
666 usb_submit_urb(out, GFP_ATOMIC);
667 } else {
668 struct snd_usb_caiaq_cb_info *oinfo = out->context;
669 clear_bit(oinfo->index, &cdev->outurb_active_mask);
670 }
671
672requeue:
673 /* re-submit inbound urb */
674 for (frame = 0; frame < FRAMES_PER_URB; frame++) {
675 urb->iso_frame_desc[frame].offset = BYTES_PER_FRAME * frame;
676 urb->iso_frame_desc[frame].length = BYTES_PER_FRAME;
677 urb->iso_frame_desc[frame].actual_length = 0;
678 }
679
680 urb->number_of_packets = FRAMES_PER_URB;
681 usb_submit_urb(urb, GFP_ATOMIC);
682}
683
684static void write_completed(struct urb *urb)
685{
686 struct snd_usb_caiaq_cb_info *info = urb->context;
687 struct snd_usb_caiaqdev *cdev = info->cdev;
688
689 if (!cdev->output_running) {
690 cdev->output_running = 1;
691 wake_up(&cdev->prepare_wait_queue);
692 }
693
694 clear_bit(info->index, &cdev->outurb_active_mask);
695}
696
697static struct urb **alloc_urbs(struct snd_usb_caiaqdev *cdev, int dir, int *ret)
698{
699 int i, frame;
700 struct urb **urbs;
701 struct usb_device *usb_dev = cdev->chip.dev;
702 unsigned int pipe;
703
704 pipe = (dir == SNDRV_PCM_STREAM_PLAYBACK) ?
705 usb_sndisocpipe(usb_dev, ENDPOINT_PLAYBACK) :
706 usb_rcvisocpipe(usb_dev, ENDPOINT_CAPTURE);
707
708 urbs = kmalloc_array(N_URBS, sizeof(*urbs), GFP_KERNEL);
709 if (!urbs) {
710 *ret = -ENOMEM;
711 return NULL;
712 }
713
714 for (i = 0; i < N_URBS; i++) {
715 urbs[i] = usb_alloc_urb(FRAMES_PER_URB, GFP_KERNEL);
716 if (!urbs[i]) {
717 *ret = -ENOMEM;
718 return urbs;
719 }
720
721 urbs[i]->transfer_buffer =
722 kmalloc_array(BYTES_PER_FRAME, FRAMES_PER_URB,
723 GFP_KERNEL);
724 if (!urbs[i]->transfer_buffer) {
725 *ret = -ENOMEM;
726 return urbs;
727 }
728
729 for (frame = 0; frame < FRAMES_PER_URB; frame++) {
730 struct usb_iso_packet_descriptor *iso =
731 &urbs[i]->iso_frame_desc[frame];
732
733 iso->offset = BYTES_PER_FRAME * frame;
734 iso->length = BYTES_PER_FRAME;
735 }
736
737 urbs[i]->dev = usb_dev;
738 urbs[i]->pipe = pipe;
739 urbs[i]->transfer_buffer_length = FRAMES_PER_URB
740 * BYTES_PER_FRAME;
741 urbs[i]->context = &cdev->data_cb_info[i];
742 urbs[i]->interval = 1;
743 urbs[i]->number_of_packets = FRAMES_PER_URB;
744 urbs[i]->complete = (dir == SNDRV_PCM_STREAM_CAPTURE) ?
745 read_completed : write_completed;
746 }
747
748 *ret = 0;
749 return urbs;
750}
751
752static void free_urbs(struct urb **urbs)
753{
754 int i;
755
756 if (!urbs)
757 return;
758
759 for (i = 0; i < N_URBS; i++) {
760 if (!urbs[i])
761 continue;
762
763 usb_kill_urb(urbs[i]);
764 kfree(urbs[i]->transfer_buffer);
765 usb_free_urb(urbs[i]);
766 }
767
768 kfree(urbs);
769}
770
771int snd_usb_caiaq_audio_init(struct snd_usb_caiaqdev *cdev)
772{
773 int i, ret;
774 struct device *dev = caiaqdev_to_dev(cdev);
775
776 cdev->n_audio_in = max(cdev->spec.num_analog_audio_in,
777 cdev->spec.num_digital_audio_in) /
778 CHANNELS_PER_STREAM;
779 cdev->n_audio_out = max(cdev->spec.num_analog_audio_out,
780 cdev->spec.num_digital_audio_out) /
781 CHANNELS_PER_STREAM;
782 cdev->n_streams = max(cdev->n_audio_in, cdev->n_audio_out);
783
784 dev_dbg(dev, "cdev->n_audio_in = %d\n", cdev->n_audio_in);
785 dev_dbg(dev, "cdev->n_audio_out = %d\n", cdev->n_audio_out);
786 dev_dbg(dev, "cdev->n_streams = %d\n", cdev->n_streams);
787
788 if (cdev->n_streams > MAX_STREAMS) {
789 dev_err(dev, "unable to initialize device, too many streams.\n");
790 return -EINVAL;
791 }
792
793 if (cdev->n_streams < 1) {
794 dev_err(dev, "bogus number of streams: %d\n", cdev->n_streams);
795 return -EINVAL;
796 }
797
798 ret = snd_pcm_new(cdev->chip.card, cdev->product_name, 0,
799 cdev->n_audio_out, cdev->n_audio_in, &cdev->pcm);
800
801 if (ret < 0) {
802 dev_err(dev, "snd_pcm_new() returned %d\n", ret);
803 return ret;
804 }
805
806 cdev->pcm->private_data = cdev;
807 strscpy(cdev->pcm->name, cdev->product_name, sizeof(cdev->pcm->name));
808
809 memset(cdev->sub_playback, 0, sizeof(cdev->sub_playback));
810 memset(cdev->sub_capture, 0, sizeof(cdev->sub_capture));
811
812 memcpy(&cdev->pcm_info, &snd_usb_caiaq_pcm_hardware,
813 sizeof(snd_usb_caiaq_pcm_hardware));
814
815 /* setup samplerates */
816 cdev->samplerates = cdev->pcm_info.rates;
817 switch (cdev->chip.usb_id) {
818 case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_AK1):
819 case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_RIGKONTROL3):
820 case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_SESSIONIO):
821 case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_GUITARRIGMOBILE):
822 cdev->samplerates |= SNDRV_PCM_RATE_192000;
823 fallthrough;
824 case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_AUDIO2DJ):
825 case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_AUDIO4DJ):
826 case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_AUDIO8DJ):
827 case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_TRAKTORAUDIO2):
828 cdev->samplerates |= SNDRV_PCM_RATE_88200;
829 break;
830 }
831
832 snd_pcm_set_ops(cdev->pcm, SNDRV_PCM_STREAM_PLAYBACK,
833 &snd_usb_caiaq_ops);
834 snd_pcm_set_ops(cdev->pcm, SNDRV_PCM_STREAM_CAPTURE,
835 &snd_usb_caiaq_ops);
836 snd_pcm_set_managed_buffer_all(cdev->pcm, SNDRV_DMA_TYPE_VMALLOC,
837 NULL, 0, 0);
838
839 cdev->data_cb_info =
840 kmalloc_array(N_URBS, sizeof(struct snd_usb_caiaq_cb_info),
841 GFP_KERNEL);
842
843 if (!cdev->data_cb_info)
844 return -ENOMEM;
845
846 cdev->outurb_active_mask = 0;
847 BUILD_BUG_ON(N_URBS > (sizeof(cdev->outurb_active_mask) * 8));
848
849 for (i = 0; i < N_URBS; i++) {
850 cdev->data_cb_info[i].cdev = cdev;
851 cdev->data_cb_info[i].index = i;
852 }
853
854 cdev->data_urbs_in = alloc_urbs(cdev, SNDRV_PCM_STREAM_CAPTURE, &ret);
855 if (ret < 0) {
856 kfree(cdev->data_cb_info);
857 free_urbs(cdev->data_urbs_in);
858 return ret;
859 }
860
861 cdev->data_urbs_out = alloc_urbs(cdev, SNDRV_PCM_STREAM_PLAYBACK, &ret);
862 if (ret < 0) {
863 kfree(cdev->data_cb_info);
864 free_urbs(cdev->data_urbs_in);
865 free_urbs(cdev->data_urbs_out);
866 return ret;
867 }
868
869 return 0;
870}
871
872void snd_usb_caiaq_audio_free(struct snd_usb_caiaqdev *cdev)
873{
874 struct device *dev = caiaqdev_to_dev(cdev);
875
876 dev_dbg(dev, "%s(%p)\n", __func__, cdev);
877 stream_stop(cdev);
878 free_urbs(cdev->data_urbs_in);
879 free_urbs(cdev->data_urbs_out);
880 kfree(cdev->data_cb_info);
881}
882
1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * Copyright (c) 2006-2008 Daniel Mack, Karsten Wiese
4*/
5
6#include <linux/device.h>
7#include <linux/spinlock.h>
8#include <linux/slab.h>
9#include <linux/init.h>
10#include <linux/usb.h>
11#include <sound/core.h>
12#include <sound/pcm.h>
13
14#include "device.h"
15#include "audio.h"
16
17#define N_URBS 32
18#define CLOCK_DRIFT_TOLERANCE 5
19#define FRAMES_PER_URB 8
20#define BYTES_PER_FRAME 512
21#define CHANNELS_PER_STREAM 2
22#define BYTES_PER_SAMPLE 3
23#define BYTES_PER_SAMPLE_USB 4
24#define MAX_BUFFER_SIZE (128*1024)
25#define MAX_ENDPOINT_SIZE 512
26
27#define ENDPOINT_CAPTURE 2
28#define ENDPOINT_PLAYBACK 6
29
30#define MAKE_CHECKBYTE(cdev,stream,i) \
31 (stream << 1) | (~(i / (cdev->n_streams * BYTES_PER_SAMPLE_USB)) & 1)
32
33static const struct snd_pcm_hardware snd_usb_caiaq_pcm_hardware = {
34 .info = (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
35 SNDRV_PCM_INFO_BLOCK_TRANSFER),
36 .formats = SNDRV_PCM_FMTBIT_S24_3BE,
37 .rates = (SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000 |
38 SNDRV_PCM_RATE_96000),
39 .rate_min = 44100,
40 .rate_max = 0, /* will overwrite later */
41 .channels_min = CHANNELS_PER_STREAM,
42 .channels_max = CHANNELS_PER_STREAM,
43 .buffer_bytes_max = MAX_BUFFER_SIZE,
44 .period_bytes_min = 128,
45 .period_bytes_max = MAX_BUFFER_SIZE,
46 .periods_min = 1,
47 .periods_max = 1024,
48};
49
50static void
51activate_substream(struct snd_usb_caiaqdev *cdev,
52 struct snd_pcm_substream *sub)
53{
54 spin_lock(&cdev->spinlock);
55
56 if (sub->stream == SNDRV_PCM_STREAM_PLAYBACK)
57 cdev->sub_playback[sub->number] = sub;
58 else
59 cdev->sub_capture[sub->number] = sub;
60
61 spin_unlock(&cdev->spinlock);
62}
63
64static void
65deactivate_substream(struct snd_usb_caiaqdev *cdev,
66 struct snd_pcm_substream *sub)
67{
68 unsigned long flags;
69 spin_lock_irqsave(&cdev->spinlock, flags);
70
71 if (sub->stream == SNDRV_PCM_STREAM_PLAYBACK)
72 cdev->sub_playback[sub->number] = NULL;
73 else
74 cdev->sub_capture[sub->number] = NULL;
75
76 spin_unlock_irqrestore(&cdev->spinlock, flags);
77}
78
79static int
80all_substreams_zero(struct snd_pcm_substream **subs)
81{
82 int i;
83 for (i = 0; i < MAX_STREAMS; i++)
84 if (subs[i] != NULL)
85 return 0;
86 return 1;
87}
88
89static int stream_start(struct snd_usb_caiaqdev *cdev)
90{
91 int i, ret;
92 struct device *dev = caiaqdev_to_dev(cdev);
93
94 dev_dbg(dev, "%s(%p)\n", __func__, cdev);
95
96 if (cdev->streaming)
97 return -EINVAL;
98
99 memset(cdev->sub_playback, 0, sizeof(cdev->sub_playback));
100 memset(cdev->sub_capture, 0, sizeof(cdev->sub_capture));
101 cdev->input_panic = 0;
102 cdev->output_panic = 0;
103 cdev->first_packet = 4;
104 cdev->streaming = 1;
105 cdev->warned = 0;
106
107 for (i = 0; i < N_URBS; i++) {
108 ret = usb_submit_urb(cdev->data_urbs_in[i], GFP_ATOMIC);
109 if (ret) {
110 dev_err(dev, "unable to trigger read #%d! (ret %d)\n",
111 i, ret);
112 cdev->streaming = 0;
113 return -EPIPE;
114 }
115 }
116
117 return 0;
118}
119
120static void stream_stop(struct snd_usb_caiaqdev *cdev)
121{
122 int i;
123 struct device *dev = caiaqdev_to_dev(cdev);
124
125 dev_dbg(dev, "%s(%p)\n", __func__, cdev);
126 if (!cdev->streaming)
127 return;
128
129 cdev->streaming = 0;
130
131 for (i = 0; i < N_URBS; i++) {
132 usb_kill_urb(cdev->data_urbs_in[i]);
133
134 if (test_bit(i, &cdev->outurb_active_mask))
135 usb_kill_urb(cdev->data_urbs_out[i]);
136 }
137
138 cdev->outurb_active_mask = 0;
139}
140
141static int snd_usb_caiaq_substream_open(struct snd_pcm_substream *substream)
142{
143 struct snd_usb_caiaqdev *cdev = snd_pcm_substream_chip(substream);
144 struct device *dev = caiaqdev_to_dev(cdev);
145
146 dev_dbg(dev, "%s(%p)\n", __func__, substream);
147 substream->runtime->hw = cdev->pcm_info;
148 snd_pcm_limit_hw_rates(substream->runtime);
149
150 return 0;
151}
152
153static int snd_usb_caiaq_substream_close(struct snd_pcm_substream *substream)
154{
155 struct snd_usb_caiaqdev *cdev = snd_pcm_substream_chip(substream);
156 struct device *dev = caiaqdev_to_dev(cdev);
157
158 dev_dbg(dev, "%s(%p)\n", __func__, substream);
159 if (all_substreams_zero(cdev->sub_playback) &&
160 all_substreams_zero(cdev->sub_capture)) {
161 /* when the last client has stopped streaming,
162 * all sample rates are allowed again */
163 stream_stop(cdev);
164 cdev->pcm_info.rates = cdev->samplerates;
165 }
166
167 return 0;
168}
169
170static int snd_usb_caiaq_pcm_hw_free(struct snd_pcm_substream *sub)
171{
172 struct snd_usb_caiaqdev *cdev = snd_pcm_substream_chip(sub);
173 deactivate_substream(cdev, sub);
174 return 0;
175}
176
177static int snd_usb_caiaq_pcm_prepare(struct snd_pcm_substream *substream)
178{
179 int bytes_per_sample, bpp, ret;
180 int index = substream->number;
181 struct snd_usb_caiaqdev *cdev = snd_pcm_substream_chip(substream);
182 struct snd_pcm_runtime *runtime = substream->runtime;
183 struct device *dev = caiaqdev_to_dev(cdev);
184
185 dev_dbg(dev, "%s(%p)\n", __func__, substream);
186
187 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
188 int out_pos;
189
190 switch (cdev->spec.data_alignment) {
191 case 0:
192 case 2:
193 out_pos = BYTES_PER_SAMPLE + 1;
194 break;
195 case 3:
196 default:
197 out_pos = 0;
198 break;
199 }
200
201 cdev->period_out_count[index] = out_pos;
202 cdev->audio_out_buf_pos[index] = out_pos;
203 } else {
204 int in_pos;
205
206 switch (cdev->spec.data_alignment) {
207 case 0:
208 in_pos = BYTES_PER_SAMPLE + 2;
209 break;
210 case 2:
211 in_pos = BYTES_PER_SAMPLE;
212 break;
213 case 3:
214 default:
215 in_pos = 0;
216 break;
217 }
218
219 cdev->period_in_count[index] = in_pos;
220 cdev->audio_in_buf_pos[index] = in_pos;
221 }
222
223 if (cdev->streaming)
224 return 0;
225
226 /* the first client that opens a stream defines the sample rate
227 * setting for all subsequent calls, until the last client closed. */
228 cdev->pcm_info.rates = snd_pcm_rate_to_rate_bit(runtime->rate);
229 snd_pcm_limit_hw_rates(runtime);
230
231 bytes_per_sample = BYTES_PER_SAMPLE;
232 if (cdev->spec.data_alignment >= 2)
233 bytes_per_sample++;
234
235 bpp = ((runtime->rate / 8000) + CLOCK_DRIFT_TOLERANCE)
236 * bytes_per_sample * CHANNELS_PER_STREAM * cdev->n_streams;
237
238 if (bpp > MAX_ENDPOINT_SIZE)
239 bpp = MAX_ENDPOINT_SIZE;
240
241 ret = snd_usb_caiaq_set_audio_params(cdev, runtime->rate,
242 runtime->sample_bits, bpp);
243 if (ret)
244 return ret;
245
246 ret = stream_start(cdev);
247 if (ret)
248 return ret;
249
250 cdev->output_running = 0;
251 wait_event_timeout(cdev->prepare_wait_queue, cdev->output_running, HZ);
252 if (!cdev->output_running) {
253 stream_stop(cdev);
254 return -EPIPE;
255 }
256
257 return 0;
258}
259
260static int snd_usb_caiaq_pcm_trigger(struct snd_pcm_substream *sub, int cmd)
261{
262 struct snd_usb_caiaqdev *cdev = snd_pcm_substream_chip(sub);
263 struct device *dev = caiaqdev_to_dev(cdev);
264
265 dev_dbg(dev, "%s(%p) cmd %d\n", __func__, sub, cmd);
266
267 switch (cmd) {
268 case SNDRV_PCM_TRIGGER_START:
269 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
270 activate_substream(cdev, sub);
271 break;
272 case SNDRV_PCM_TRIGGER_STOP:
273 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
274 deactivate_substream(cdev, sub);
275 break;
276 default:
277 return -EINVAL;
278 }
279
280 return 0;
281}
282
283static snd_pcm_uframes_t
284snd_usb_caiaq_pcm_pointer(struct snd_pcm_substream *sub)
285{
286 int index = sub->number;
287 struct snd_usb_caiaqdev *cdev = snd_pcm_substream_chip(sub);
288 snd_pcm_uframes_t ptr;
289
290 spin_lock(&cdev->spinlock);
291
292 if (cdev->input_panic || cdev->output_panic) {
293 ptr = SNDRV_PCM_POS_XRUN;
294 goto unlock;
295 }
296
297 if (sub->stream == SNDRV_PCM_STREAM_PLAYBACK)
298 ptr = bytes_to_frames(sub->runtime,
299 cdev->audio_out_buf_pos[index]);
300 else
301 ptr = bytes_to_frames(sub->runtime,
302 cdev->audio_in_buf_pos[index]);
303
304unlock:
305 spin_unlock(&cdev->spinlock);
306 return ptr;
307}
308
309/* operators for both playback and capture */
310static const struct snd_pcm_ops snd_usb_caiaq_ops = {
311 .open = snd_usb_caiaq_substream_open,
312 .close = snd_usb_caiaq_substream_close,
313 .hw_free = snd_usb_caiaq_pcm_hw_free,
314 .prepare = snd_usb_caiaq_pcm_prepare,
315 .trigger = snd_usb_caiaq_pcm_trigger,
316 .pointer = snd_usb_caiaq_pcm_pointer,
317};
318
319static void check_for_elapsed_periods(struct snd_usb_caiaqdev *cdev,
320 struct snd_pcm_substream **subs)
321{
322 int stream, pb, *cnt;
323 struct snd_pcm_substream *sub;
324
325 for (stream = 0; stream < cdev->n_streams; stream++) {
326 sub = subs[stream];
327 if (!sub)
328 continue;
329
330 pb = snd_pcm_lib_period_bytes(sub);
331 cnt = (sub->stream == SNDRV_PCM_STREAM_PLAYBACK) ?
332 &cdev->period_out_count[stream] :
333 &cdev->period_in_count[stream];
334
335 if (*cnt >= pb) {
336 snd_pcm_period_elapsed(sub);
337 *cnt %= pb;
338 }
339 }
340}
341
342static void read_in_urb_mode0(struct snd_usb_caiaqdev *cdev,
343 const struct urb *urb,
344 const struct usb_iso_packet_descriptor *iso)
345{
346 unsigned char *usb_buf = urb->transfer_buffer + iso->offset;
347 struct snd_pcm_substream *sub;
348 int stream, i;
349
350 if (all_substreams_zero(cdev->sub_capture))
351 return;
352
353 for (i = 0; i < iso->actual_length;) {
354 for (stream = 0; stream < cdev->n_streams; stream++, i++) {
355 sub = cdev->sub_capture[stream];
356 if (sub) {
357 struct snd_pcm_runtime *rt = sub->runtime;
358 char *audio_buf = rt->dma_area;
359 int sz = frames_to_bytes(rt, rt->buffer_size);
360 audio_buf[cdev->audio_in_buf_pos[stream]++]
361 = usb_buf[i];
362 cdev->period_in_count[stream]++;
363 if (cdev->audio_in_buf_pos[stream] == sz)
364 cdev->audio_in_buf_pos[stream] = 0;
365 }
366 }
367 }
368}
369
370static void read_in_urb_mode2(struct snd_usb_caiaqdev *cdev,
371 const struct urb *urb,
372 const struct usb_iso_packet_descriptor *iso)
373{
374 unsigned char *usb_buf = urb->transfer_buffer + iso->offset;
375 unsigned char check_byte;
376 struct snd_pcm_substream *sub;
377 int stream, i;
378
379 for (i = 0; i < iso->actual_length;) {
380 if (i % (cdev->n_streams * BYTES_PER_SAMPLE_USB) == 0) {
381 for (stream = 0;
382 stream < cdev->n_streams;
383 stream++, i++) {
384 if (cdev->first_packet)
385 continue;
386
387 check_byte = MAKE_CHECKBYTE(cdev, stream, i);
388
389 if ((usb_buf[i] & 0x3f) != check_byte)
390 cdev->input_panic = 1;
391
392 if (usb_buf[i] & 0x80)
393 cdev->output_panic = 1;
394 }
395 }
396 cdev->first_packet = 0;
397
398 for (stream = 0; stream < cdev->n_streams; stream++, i++) {
399 sub = cdev->sub_capture[stream];
400 if (cdev->input_panic)
401 usb_buf[i] = 0;
402
403 if (sub) {
404 struct snd_pcm_runtime *rt = sub->runtime;
405 char *audio_buf = rt->dma_area;
406 int sz = frames_to_bytes(rt, rt->buffer_size);
407 audio_buf[cdev->audio_in_buf_pos[stream]++] =
408 usb_buf[i];
409 cdev->period_in_count[stream]++;
410 if (cdev->audio_in_buf_pos[stream] == sz)
411 cdev->audio_in_buf_pos[stream] = 0;
412 }
413 }
414 }
415}
416
417static void read_in_urb_mode3(struct snd_usb_caiaqdev *cdev,
418 const struct urb *urb,
419 const struct usb_iso_packet_descriptor *iso)
420{
421 unsigned char *usb_buf = urb->transfer_buffer + iso->offset;
422 struct device *dev = caiaqdev_to_dev(cdev);
423 int stream, i;
424
425 /* paranoia check */
426 if (iso->actual_length % (BYTES_PER_SAMPLE_USB * CHANNELS_PER_STREAM))
427 return;
428
429 for (i = 0; i < iso->actual_length;) {
430 for (stream = 0; stream < cdev->n_streams; stream++) {
431 struct snd_pcm_substream *sub = cdev->sub_capture[stream];
432 char *audio_buf = NULL;
433 int c, n, sz = 0;
434
435 if (sub && !cdev->input_panic) {
436 struct snd_pcm_runtime *rt = sub->runtime;
437 audio_buf = rt->dma_area;
438 sz = frames_to_bytes(rt, rt->buffer_size);
439 }
440
441 for (c = 0; c < CHANNELS_PER_STREAM; c++) {
442 /* 3 audio data bytes, followed by 1 check byte */
443 if (audio_buf) {
444 for (n = 0; n < BYTES_PER_SAMPLE; n++) {
445 audio_buf[cdev->audio_in_buf_pos[stream]++] = usb_buf[i+n];
446
447 if (cdev->audio_in_buf_pos[stream] == sz)
448 cdev->audio_in_buf_pos[stream] = 0;
449 }
450
451 cdev->period_in_count[stream] += BYTES_PER_SAMPLE;
452 }
453
454 i += BYTES_PER_SAMPLE;
455
456 if (usb_buf[i] != ((stream << 1) | c) &&
457 !cdev->first_packet) {
458 if (!cdev->input_panic)
459 dev_warn(dev, " EXPECTED: %02x got %02x, c %d, stream %d, i %d\n",
460 ((stream << 1) | c), usb_buf[i], c, stream, i);
461 cdev->input_panic = 1;
462 }
463
464 i++;
465 }
466 }
467 }
468
469 if (cdev->first_packet > 0)
470 cdev->first_packet--;
471}
472
473static void read_in_urb(struct snd_usb_caiaqdev *cdev,
474 const struct urb *urb,
475 const struct usb_iso_packet_descriptor *iso)
476{
477 struct device *dev = caiaqdev_to_dev(cdev);
478
479 if (!cdev->streaming)
480 return;
481
482 if (iso->actual_length < cdev->bpp)
483 return;
484
485 switch (cdev->spec.data_alignment) {
486 case 0:
487 read_in_urb_mode0(cdev, urb, iso);
488 break;
489 case 2:
490 read_in_urb_mode2(cdev, urb, iso);
491 break;
492 case 3:
493 read_in_urb_mode3(cdev, urb, iso);
494 break;
495 }
496
497 if ((cdev->input_panic || cdev->output_panic) && !cdev->warned) {
498 dev_warn(dev, "streaming error detected %s %s\n",
499 cdev->input_panic ? "(input)" : "",
500 cdev->output_panic ? "(output)" : "");
501 cdev->warned = 1;
502 }
503}
504
505static void fill_out_urb_mode_0(struct snd_usb_caiaqdev *cdev,
506 struct urb *urb,
507 const struct usb_iso_packet_descriptor *iso)
508{
509 unsigned char *usb_buf = urb->transfer_buffer + iso->offset;
510 struct snd_pcm_substream *sub;
511 int stream, i;
512
513 for (i = 0; i < iso->length;) {
514 for (stream = 0; stream < cdev->n_streams; stream++, i++) {
515 sub = cdev->sub_playback[stream];
516 if (sub) {
517 struct snd_pcm_runtime *rt = sub->runtime;
518 char *audio_buf = rt->dma_area;
519 int sz = frames_to_bytes(rt, rt->buffer_size);
520 usb_buf[i] =
521 audio_buf[cdev->audio_out_buf_pos[stream]];
522 cdev->period_out_count[stream]++;
523 cdev->audio_out_buf_pos[stream]++;
524 if (cdev->audio_out_buf_pos[stream] == sz)
525 cdev->audio_out_buf_pos[stream] = 0;
526 } else
527 usb_buf[i] = 0;
528 }
529
530 /* fill in the check bytes */
531 if (cdev->spec.data_alignment == 2 &&
532 i % (cdev->n_streams * BYTES_PER_SAMPLE_USB) ==
533 (cdev->n_streams * CHANNELS_PER_STREAM))
534 for (stream = 0; stream < cdev->n_streams; stream++, i++)
535 usb_buf[i] = MAKE_CHECKBYTE(cdev, stream, i);
536 }
537}
538
539static void fill_out_urb_mode_3(struct snd_usb_caiaqdev *cdev,
540 struct urb *urb,
541 const struct usb_iso_packet_descriptor *iso)
542{
543 unsigned char *usb_buf = urb->transfer_buffer + iso->offset;
544 int stream, i;
545
546 for (i = 0; i < iso->length;) {
547 for (stream = 0; stream < cdev->n_streams; stream++) {
548 struct snd_pcm_substream *sub = cdev->sub_playback[stream];
549 char *audio_buf = NULL;
550 int c, n, sz = 0;
551
552 if (sub) {
553 struct snd_pcm_runtime *rt = sub->runtime;
554 audio_buf = rt->dma_area;
555 sz = frames_to_bytes(rt, rt->buffer_size);
556 }
557
558 for (c = 0; c < CHANNELS_PER_STREAM; c++) {
559 for (n = 0; n < BYTES_PER_SAMPLE; n++) {
560 if (audio_buf) {
561 usb_buf[i+n] = audio_buf[cdev->audio_out_buf_pos[stream]++];
562
563 if (cdev->audio_out_buf_pos[stream] == sz)
564 cdev->audio_out_buf_pos[stream] = 0;
565 } else {
566 usb_buf[i+n] = 0;
567 }
568 }
569
570 if (audio_buf)
571 cdev->period_out_count[stream] += BYTES_PER_SAMPLE;
572
573 i += BYTES_PER_SAMPLE;
574
575 /* fill in the check byte pattern */
576 usb_buf[i++] = (stream << 1) | c;
577 }
578 }
579 }
580}
581
582static inline void fill_out_urb(struct snd_usb_caiaqdev *cdev,
583 struct urb *urb,
584 const struct usb_iso_packet_descriptor *iso)
585{
586 switch (cdev->spec.data_alignment) {
587 case 0:
588 case 2:
589 fill_out_urb_mode_0(cdev, urb, iso);
590 break;
591 case 3:
592 fill_out_urb_mode_3(cdev, urb, iso);
593 break;
594 }
595}
596
597static void read_completed(struct urb *urb)
598{
599 struct snd_usb_caiaq_cb_info *info = urb->context;
600 struct snd_usb_caiaqdev *cdev;
601 struct device *dev;
602 struct urb *out = NULL;
603 int i, frame, len, send_it = 0, outframe = 0;
604 unsigned long flags;
605 size_t offset = 0;
606
607 if (urb->status || !info)
608 return;
609
610 cdev = info->cdev;
611 dev = caiaqdev_to_dev(cdev);
612
613 if (!cdev->streaming)
614 return;
615
616 /* find an unused output urb that is unused */
617 for (i = 0; i < N_URBS; i++)
618 if (test_and_set_bit(i, &cdev->outurb_active_mask) == 0) {
619 out = cdev->data_urbs_out[i];
620 break;
621 }
622
623 if (!out) {
624 dev_err(dev, "Unable to find an output urb to use\n");
625 goto requeue;
626 }
627
628 /* read the recently received packet and send back one which has
629 * the same layout */
630 for (frame = 0; frame < FRAMES_PER_URB; frame++) {
631 if (urb->iso_frame_desc[frame].status)
632 continue;
633
634 len = urb->iso_frame_desc[outframe].actual_length;
635 out->iso_frame_desc[outframe].length = len;
636 out->iso_frame_desc[outframe].actual_length = 0;
637 out->iso_frame_desc[outframe].offset = offset;
638 offset += len;
639
640 if (len > 0) {
641 spin_lock_irqsave(&cdev->spinlock, flags);
642 fill_out_urb(cdev, out, &out->iso_frame_desc[outframe]);
643 read_in_urb(cdev, urb, &urb->iso_frame_desc[frame]);
644 spin_unlock_irqrestore(&cdev->spinlock, flags);
645 check_for_elapsed_periods(cdev, cdev->sub_playback);
646 check_for_elapsed_periods(cdev, cdev->sub_capture);
647 send_it = 1;
648 }
649
650 outframe++;
651 }
652
653 if (send_it) {
654 out->number_of_packets = outframe;
655 usb_submit_urb(out, GFP_ATOMIC);
656 } else {
657 struct snd_usb_caiaq_cb_info *oinfo = out->context;
658 clear_bit(oinfo->index, &cdev->outurb_active_mask);
659 }
660
661requeue:
662 /* re-submit inbound urb */
663 for (frame = 0; frame < FRAMES_PER_URB; frame++) {
664 urb->iso_frame_desc[frame].offset = BYTES_PER_FRAME * frame;
665 urb->iso_frame_desc[frame].length = BYTES_PER_FRAME;
666 urb->iso_frame_desc[frame].actual_length = 0;
667 }
668
669 urb->number_of_packets = FRAMES_PER_URB;
670 usb_submit_urb(urb, GFP_ATOMIC);
671}
672
673static void write_completed(struct urb *urb)
674{
675 struct snd_usb_caiaq_cb_info *info = urb->context;
676 struct snd_usb_caiaqdev *cdev = info->cdev;
677
678 if (!cdev->output_running) {
679 cdev->output_running = 1;
680 wake_up(&cdev->prepare_wait_queue);
681 }
682
683 clear_bit(info->index, &cdev->outurb_active_mask);
684}
685
686static struct urb **alloc_urbs(struct snd_usb_caiaqdev *cdev, int dir, int *ret)
687{
688 int i, frame;
689 struct urb **urbs;
690 struct usb_device *usb_dev = cdev->chip.dev;
691 unsigned int pipe;
692
693 pipe = (dir == SNDRV_PCM_STREAM_PLAYBACK) ?
694 usb_sndisocpipe(usb_dev, ENDPOINT_PLAYBACK) :
695 usb_rcvisocpipe(usb_dev, ENDPOINT_CAPTURE);
696
697 urbs = kmalloc_array(N_URBS, sizeof(*urbs), GFP_KERNEL);
698 if (!urbs) {
699 *ret = -ENOMEM;
700 return NULL;
701 }
702
703 for (i = 0; i < N_URBS; i++) {
704 urbs[i] = usb_alloc_urb(FRAMES_PER_URB, GFP_KERNEL);
705 if (!urbs[i]) {
706 *ret = -ENOMEM;
707 return urbs;
708 }
709
710 urbs[i]->transfer_buffer =
711 kmalloc_array(BYTES_PER_FRAME, FRAMES_PER_URB,
712 GFP_KERNEL);
713 if (!urbs[i]->transfer_buffer) {
714 *ret = -ENOMEM;
715 return urbs;
716 }
717
718 for (frame = 0; frame < FRAMES_PER_URB; frame++) {
719 struct usb_iso_packet_descriptor *iso =
720 &urbs[i]->iso_frame_desc[frame];
721
722 iso->offset = BYTES_PER_FRAME * frame;
723 iso->length = BYTES_PER_FRAME;
724 }
725
726 urbs[i]->dev = usb_dev;
727 urbs[i]->pipe = pipe;
728 urbs[i]->transfer_buffer_length = FRAMES_PER_URB
729 * BYTES_PER_FRAME;
730 urbs[i]->context = &cdev->data_cb_info[i];
731 urbs[i]->interval = 1;
732 urbs[i]->number_of_packets = FRAMES_PER_URB;
733 urbs[i]->complete = (dir == SNDRV_PCM_STREAM_CAPTURE) ?
734 read_completed : write_completed;
735 }
736
737 *ret = 0;
738 return urbs;
739}
740
741static void free_urbs(struct urb **urbs)
742{
743 int i;
744
745 if (!urbs)
746 return;
747
748 for (i = 0; i < N_URBS; i++) {
749 if (!urbs[i])
750 continue;
751
752 usb_kill_urb(urbs[i]);
753 kfree(urbs[i]->transfer_buffer);
754 usb_free_urb(urbs[i]);
755 }
756
757 kfree(urbs);
758}
759
760int snd_usb_caiaq_audio_init(struct snd_usb_caiaqdev *cdev)
761{
762 int i, ret;
763 struct device *dev = caiaqdev_to_dev(cdev);
764
765 cdev->n_audio_in = max(cdev->spec.num_analog_audio_in,
766 cdev->spec.num_digital_audio_in) /
767 CHANNELS_PER_STREAM;
768 cdev->n_audio_out = max(cdev->spec.num_analog_audio_out,
769 cdev->spec.num_digital_audio_out) /
770 CHANNELS_PER_STREAM;
771 cdev->n_streams = max(cdev->n_audio_in, cdev->n_audio_out);
772
773 dev_dbg(dev, "cdev->n_audio_in = %d\n", cdev->n_audio_in);
774 dev_dbg(dev, "cdev->n_audio_out = %d\n", cdev->n_audio_out);
775 dev_dbg(dev, "cdev->n_streams = %d\n", cdev->n_streams);
776
777 if (cdev->n_streams > MAX_STREAMS) {
778 dev_err(dev, "unable to initialize device, too many streams.\n");
779 return -EINVAL;
780 }
781
782 if (cdev->n_streams < 1) {
783 dev_err(dev, "bogus number of streams: %d\n", cdev->n_streams);
784 return -EINVAL;
785 }
786
787 ret = snd_pcm_new(cdev->chip.card, cdev->product_name, 0,
788 cdev->n_audio_out, cdev->n_audio_in, &cdev->pcm);
789
790 if (ret < 0) {
791 dev_err(dev, "snd_pcm_new() returned %d\n", ret);
792 return ret;
793 }
794
795 cdev->pcm->private_data = cdev;
796 strscpy(cdev->pcm->name, cdev->product_name, sizeof(cdev->pcm->name));
797
798 memset(cdev->sub_playback, 0, sizeof(cdev->sub_playback));
799 memset(cdev->sub_capture, 0, sizeof(cdev->sub_capture));
800
801 memcpy(&cdev->pcm_info, &snd_usb_caiaq_pcm_hardware,
802 sizeof(snd_usb_caiaq_pcm_hardware));
803
804 /* setup samplerates */
805 cdev->samplerates = cdev->pcm_info.rates;
806 switch (cdev->chip.usb_id) {
807 case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_AK1):
808 case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_RIGKONTROL3):
809 case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_SESSIONIO):
810 case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_GUITARRIGMOBILE):
811 cdev->samplerates |= SNDRV_PCM_RATE_192000;
812 fallthrough;
813 case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_AUDIO2DJ):
814 case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_AUDIO4DJ):
815 case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_AUDIO8DJ):
816 case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_TRAKTORAUDIO2):
817 cdev->samplerates |= SNDRV_PCM_RATE_88200;
818 break;
819 }
820
821 snd_pcm_set_ops(cdev->pcm, SNDRV_PCM_STREAM_PLAYBACK,
822 &snd_usb_caiaq_ops);
823 snd_pcm_set_ops(cdev->pcm, SNDRV_PCM_STREAM_CAPTURE,
824 &snd_usb_caiaq_ops);
825 snd_pcm_set_managed_buffer_all(cdev->pcm, SNDRV_DMA_TYPE_VMALLOC,
826 NULL, 0, 0);
827
828 cdev->data_cb_info =
829 kmalloc_array(N_URBS, sizeof(struct snd_usb_caiaq_cb_info),
830 GFP_KERNEL);
831
832 if (!cdev->data_cb_info)
833 return -ENOMEM;
834
835 cdev->outurb_active_mask = 0;
836 BUILD_BUG_ON(N_URBS > (sizeof(cdev->outurb_active_mask) * 8));
837
838 for (i = 0; i < N_URBS; i++) {
839 cdev->data_cb_info[i].cdev = cdev;
840 cdev->data_cb_info[i].index = i;
841 }
842
843 cdev->data_urbs_in = alloc_urbs(cdev, SNDRV_PCM_STREAM_CAPTURE, &ret);
844 if (ret < 0) {
845 kfree(cdev->data_cb_info);
846 free_urbs(cdev->data_urbs_in);
847 return ret;
848 }
849
850 cdev->data_urbs_out = alloc_urbs(cdev, SNDRV_PCM_STREAM_PLAYBACK, &ret);
851 if (ret < 0) {
852 kfree(cdev->data_cb_info);
853 free_urbs(cdev->data_urbs_in);
854 free_urbs(cdev->data_urbs_out);
855 return ret;
856 }
857
858 return 0;
859}
860
861void snd_usb_caiaq_audio_disconnect(struct snd_usb_caiaqdev *cdev)
862{
863 struct device *dev = caiaqdev_to_dev(cdev);
864
865 dev_dbg(dev, "%s(%p)\n", __func__, cdev);
866 stream_stop(cdev);
867}
868
869void snd_usb_caiaq_audio_free(struct snd_usb_caiaqdev *cdev)
870{
871 struct device *dev = caiaqdev_to_dev(cdev);
872
873 dev_dbg(dev, "%s(%p)\n", __func__, cdev);
874 free_urbs(cdev->data_urbs_in);
875 free_urbs(cdev->data_urbs_out);
876 kfree(cdev->data_cb_info);
877}