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Merge branch 'work.compat' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
[mirror_ubuntu-focal-kernel.git] / sound / usb / caiaq / audio.c
1 /*
2 * Copyright (c) 2006-2008 Daniel Mack, Karsten Wiese
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
17 */
18
19 #include <linux/device.h>
20 #include <linux/spinlock.h>
21 #include <linux/slab.h>
22 #include <linux/init.h>
23 #include <linux/usb.h>
24 #include <sound/core.h>
25 #include <sound/pcm.h>
26
27 #include "device.h"
28 #include "audio.h"
29
30 #define N_URBS 32
31 #define CLOCK_DRIFT_TOLERANCE 5
32 #define FRAMES_PER_URB 8
33 #define BYTES_PER_FRAME 512
34 #define CHANNELS_PER_STREAM 2
35 #define BYTES_PER_SAMPLE 3
36 #define BYTES_PER_SAMPLE_USB 4
37 #define MAX_BUFFER_SIZE (128*1024)
38 #define MAX_ENDPOINT_SIZE 512
39
40 #define ENDPOINT_CAPTURE 2
41 #define ENDPOINT_PLAYBACK 6
42
43 #define MAKE_CHECKBYTE(cdev,stream,i) \
44 (stream << 1) | (~(i / (cdev->n_streams * BYTES_PER_SAMPLE_USB)) & 1)
45
46 static struct snd_pcm_hardware snd_usb_caiaq_pcm_hardware = {
47 .info = (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
48 SNDRV_PCM_INFO_BLOCK_TRANSFER),
49 .formats = SNDRV_PCM_FMTBIT_S24_3BE,
50 .rates = (SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000 |
51 SNDRV_PCM_RATE_96000),
52 .rate_min = 44100,
53 .rate_max = 0, /* will overwrite later */
54 .channels_min = CHANNELS_PER_STREAM,
55 .channels_max = CHANNELS_PER_STREAM,
56 .buffer_bytes_max = MAX_BUFFER_SIZE,
57 .period_bytes_min = 128,
58 .period_bytes_max = MAX_BUFFER_SIZE,
59 .periods_min = 1,
60 .periods_max = 1024,
61 };
62
63 static void
64 activate_substream(struct snd_usb_caiaqdev *cdev,
65 struct snd_pcm_substream *sub)
66 {
67 spin_lock(&cdev->spinlock);
68
69 if (sub->stream == SNDRV_PCM_STREAM_PLAYBACK)
70 cdev->sub_playback[sub->number] = sub;
71 else
72 cdev->sub_capture[sub->number] = sub;
73
74 spin_unlock(&cdev->spinlock);
75 }
76
77 static void
78 deactivate_substream(struct snd_usb_caiaqdev *cdev,
79 struct snd_pcm_substream *sub)
80 {
81 unsigned long flags;
82 spin_lock_irqsave(&cdev->spinlock, flags);
83
84 if (sub->stream == SNDRV_PCM_STREAM_PLAYBACK)
85 cdev->sub_playback[sub->number] = NULL;
86 else
87 cdev->sub_capture[sub->number] = NULL;
88
89 spin_unlock_irqrestore(&cdev->spinlock, flags);
90 }
91
92 static int
93 all_substreams_zero(struct snd_pcm_substream **subs)
94 {
95 int i;
96 for (i = 0; i < MAX_STREAMS; i++)
97 if (subs[i] != NULL)
98 return 0;
99 return 1;
100 }
101
102 static int stream_start(struct snd_usb_caiaqdev *cdev)
103 {
104 int i, ret;
105 struct device *dev = caiaqdev_to_dev(cdev);
106
107 dev_dbg(dev, "%s(%p)\n", __func__, cdev);
108
109 if (cdev->streaming)
110 return -EINVAL;
111
112 memset(cdev->sub_playback, 0, sizeof(cdev->sub_playback));
113 memset(cdev->sub_capture, 0, sizeof(cdev->sub_capture));
114 cdev->input_panic = 0;
115 cdev->output_panic = 0;
116 cdev->first_packet = 4;
117 cdev->streaming = 1;
118 cdev->warned = 0;
119
120 for (i = 0; i < N_URBS; i++) {
121 ret = usb_submit_urb(cdev->data_urbs_in[i], GFP_ATOMIC);
122 if (ret) {
123 dev_err(dev, "unable to trigger read #%d! (ret %d)\n",
124 i, ret);
125 cdev->streaming = 0;
126 return -EPIPE;
127 }
128 }
129
130 return 0;
131 }
132
133 static void stream_stop(struct snd_usb_caiaqdev *cdev)
134 {
135 int i;
136 struct device *dev = caiaqdev_to_dev(cdev);
137
138 dev_dbg(dev, "%s(%p)\n", __func__, cdev);
139 if (!cdev->streaming)
140 return;
141
142 cdev->streaming = 0;
143
144 for (i = 0; i < N_URBS; i++) {
145 usb_kill_urb(cdev->data_urbs_in[i]);
146
147 if (test_bit(i, &cdev->outurb_active_mask))
148 usb_kill_urb(cdev->data_urbs_out[i]);
149 }
150
151 cdev->outurb_active_mask = 0;
152 }
153
154 static int snd_usb_caiaq_substream_open(struct snd_pcm_substream *substream)
155 {
156 struct snd_usb_caiaqdev *cdev = snd_pcm_substream_chip(substream);
157 struct device *dev = caiaqdev_to_dev(cdev);
158
159 dev_dbg(dev, "%s(%p)\n", __func__, substream);
160 substream->runtime->hw = cdev->pcm_info;
161 snd_pcm_limit_hw_rates(substream->runtime);
162
163 return 0;
164 }
165
166 static int snd_usb_caiaq_substream_close(struct snd_pcm_substream *substream)
167 {
168 struct snd_usb_caiaqdev *cdev = snd_pcm_substream_chip(substream);
169 struct device *dev = caiaqdev_to_dev(cdev);
170
171 dev_dbg(dev, "%s(%p)\n", __func__, substream);
172 if (all_substreams_zero(cdev->sub_playback) &&
173 all_substreams_zero(cdev->sub_capture)) {
174 /* when the last client has stopped streaming,
175 * all sample rates are allowed again */
176 stream_stop(cdev);
177 cdev->pcm_info.rates = cdev->samplerates;
178 }
179
180 return 0;
181 }
182
183 static int snd_usb_caiaq_pcm_hw_params(struct snd_pcm_substream *sub,
184 struct snd_pcm_hw_params *hw_params)
185 {
186 return snd_pcm_lib_alloc_vmalloc_buffer(sub,
187 params_buffer_bytes(hw_params));
188 }
189
190 static int snd_usb_caiaq_pcm_hw_free(struct snd_pcm_substream *sub)
191 {
192 struct snd_usb_caiaqdev *cdev = snd_pcm_substream_chip(sub);
193 deactivate_substream(cdev, sub);
194 return snd_pcm_lib_free_vmalloc_buffer(sub);
195 }
196
197 /* this should probably go upstream */
198 #if SNDRV_PCM_RATE_5512 != 1 << 0 || SNDRV_PCM_RATE_192000 != 1 << 12
199 #error "Change this table"
200 #endif
201
202 static unsigned int rates[] = { 5512, 8000, 11025, 16000, 22050, 32000, 44100,
203 48000, 64000, 88200, 96000, 176400, 192000 };
204
205 static int snd_usb_caiaq_pcm_prepare(struct snd_pcm_substream *substream)
206 {
207 int bytes_per_sample, bpp, ret, i;
208 int index = substream->number;
209 struct snd_usb_caiaqdev *cdev = snd_pcm_substream_chip(substream);
210 struct snd_pcm_runtime *runtime = substream->runtime;
211 struct device *dev = caiaqdev_to_dev(cdev);
212
213 dev_dbg(dev, "%s(%p)\n", __func__, substream);
214
215 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
216 int out_pos;
217
218 switch (cdev->spec.data_alignment) {
219 case 0:
220 case 2:
221 out_pos = BYTES_PER_SAMPLE + 1;
222 break;
223 case 3:
224 default:
225 out_pos = 0;
226 break;
227 }
228
229 cdev->period_out_count[index] = out_pos;
230 cdev->audio_out_buf_pos[index] = out_pos;
231 } else {
232 int in_pos;
233
234 switch (cdev->spec.data_alignment) {
235 case 0:
236 in_pos = BYTES_PER_SAMPLE + 2;
237 break;
238 case 2:
239 in_pos = BYTES_PER_SAMPLE;
240 break;
241 case 3:
242 default:
243 in_pos = 0;
244 break;
245 }
246
247 cdev->period_in_count[index] = in_pos;
248 cdev->audio_in_buf_pos[index] = in_pos;
249 }
250
251 if (cdev->streaming)
252 return 0;
253
254 /* the first client that opens a stream defines the sample rate
255 * setting for all subsequent calls, until the last client closed. */
256 for (i=0; i < ARRAY_SIZE(rates); i++)
257 if (runtime->rate == rates[i])
258 cdev->pcm_info.rates = 1 << i;
259
260 snd_pcm_limit_hw_rates(runtime);
261
262 bytes_per_sample = BYTES_PER_SAMPLE;
263 if (cdev->spec.data_alignment >= 2)
264 bytes_per_sample++;
265
266 bpp = ((runtime->rate / 8000) + CLOCK_DRIFT_TOLERANCE)
267 * bytes_per_sample * CHANNELS_PER_STREAM * cdev->n_streams;
268
269 if (bpp > MAX_ENDPOINT_SIZE)
270 bpp = MAX_ENDPOINT_SIZE;
271
272 ret = snd_usb_caiaq_set_audio_params(cdev, runtime->rate,
273 runtime->sample_bits, bpp);
274 if (ret)
275 return ret;
276
277 ret = stream_start(cdev);
278 if (ret)
279 return ret;
280
281 cdev->output_running = 0;
282 wait_event_timeout(cdev->prepare_wait_queue, cdev->output_running, HZ);
283 if (!cdev->output_running) {
284 stream_stop(cdev);
285 return -EPIPE;
286 }
287
288 return 0;
289 }
290
291 static int snd_usb_caiaq_pcm_trigger(struct snd_pcm_substream *sub, int cmd)
292 {
293 struct snd_usb_caiaqdev *cdev = snd_pcm_substream_chip(sub);
294 struct device *dev = caiaqdev_to_dev(cdev);
295
296 dev_dbg(dev, "%s(%p) cmd %d\n", __func__, sub, cmd);
297
298 switch (cmd) {
299 case SNDRV_PCM_TRIGGER_START:
300 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
301 activate_substream(cdev, sub);
302 break;
303 case SNDRV_PCM_TRIGGER_STOP:
304 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
305 deactivate_substream(cdev, sub);
306 break;
307 default:
308 return -EINVAL;
309 }
310
311 return 0;
312 }
313
314 static snd_pcm_uframes_t
315 snd_usb_caiaq_pcm_pointer(struct snd_pcm_substream *sub)
316 {
317 int index = sub->number;
318 struct snd_usb_caiaqdev *cdev = snd_pcm_substream_chip(sub);
319 snd_pcm_uframes_t ptr;
320
321 spin_lock(&cdev->spinlock);
322
323 if (cdev->input_panic || cdev->output_panic) {
324 ptr = SNDRV_PCM_POS_XRUN;
325 goto unlock;
326 }
327
328 if (sub->stream == SNDRV_PCM_STREAM_PLAYBACK)
329 ptr = bytes_to_frames(sub->runtime,
330 cdev->audio_out_buf_pos[index]);
331 else
332 ptr = bytes_to_frames(sub->runtime,
333 cdev->audio_in_buf_pos[index]);
334
335 unlock:
336 spin_unlock(&cdev->spinlock);
337 return ptr;
338 }
339
340 /* operators for both playback and capture */
341 static const struct snd_pcm_ops snd_usb_caiaq_ops = {
342 .open = snd_usb_caiaq_substream_open,
343 .close = snd_usb_caiaq_substream_close,
344 .ioctl = snd_pcm_lib_ioctl,
345 .hw_params = snd_usb_caiaq_pcm_hw_params,
346 .hw_free = snd_usb_caiaq_pcm_hw_free,
347 .prepare = snd_usb_caiaq_pcm_prepare,
348 .trigger = snd_usb_caiaq_pcm_trigger,
349 .pointer = snd_usb_caiaq_pcm_pointer,
350 .page = snd_pcm_lib_get_vmalloc_page,
351 };
352
353 static void check_for_elapsed_periods(struct snd_usb_caiaqdev *cdev,
354 struct snd_pcm_substream **subs)
355 {
356 int stream, pb, *cnt;
357 struct snd_pcm_substream *sub;
358
359 for (stream = 0; stream < cdev->n_streams; stream++) {
360 sub = subs[stream];
361 if (!sub)
362 continue;
363
364 pb = snd_pcm_lib_period_bytes(sub);
365 cnt = (sub->stream == SNDRV_PCM_STREAM_PLAYBACK) ?
366 &cdev->period_out_count[stream] :
367 &cdev->period_in_count[stream];
368
369 if (*cnt >= pb) {
370 snd_pcm_period_elapsed(sub);
371 *cnt %= pb;
372 }
373 }
374 }
375
376 static void read_in_urb_mode0(struct snd_usb_caiaqdev *cdev,
377 const struct urb *urb,
378 const struct usb_iso_packet_descriptor *iso)
379 {
380 unsigned char *usb_buf = urb->transfer_buffer + iso->offset;
381 struct snd_pcm_substream *sub;
382 int stream, i;
383
384 if (all_substreams_zero(cdev->sub_capture))
385 return;
386
387 for (i = 0; i < iso->actual_length;) {
388 for (stream = 0; stream < cdev->n_streams; stream++, i++) {
389 sub = cdev->sub_capture[stream];
390 if (sub) {
391 struct snd_pcm_runtime *rt = sub->runtime;
392 char *audio_buf = rt->dma_area;
393 int sz = frames_to_bytes(rt, rt->buffer_size);
394 audio_buf[cdev->audio_in_buf_pos[stream]++]
395 = usb_buf[i];
396 cdev->period_in_count[stream]++;
397 if (cdev->audio_in_buf_pos[stream] == sz)
398 cdev->audio_in_buf_pos[stream] = 0;
399 }
400 }
401 }
402 }
403
404 static void read_in_urb_mode2(struct snd_usb_caiaqdev *cdev,
405 const struct urb *urb,
406 const struct usb_iso_packet_descriptor *iso)
407 {
408 unsigned char *usb_buf = urb->transfer_buffer + iso->offset;
409 unsigned char check_byte;
410 struct snd_pcm_substream *sub;
411 int stream, i;
412
413 for (i = 0; i < iso->actual_length;) {
414 if (i % (cdev->n_streams * BYTES_PER_SAMPLE_USB) == 0) {
415 for (stream = 0;
416 stream < cdev->n_streams;
417 stream++, i++) {
418 if (cdev->first_packet)
419 continue;
420
421 check_byte = MAKE_CHECKBYTE(cdev, stream, i);
422
423 if ((usb_buf[i] & 0x3f) != check_byte)
424 cdev->input_panic = 1;
425
426 if (usb_buf[i] & 0x80)
427 cdev->output_panic = 1;
428 }
429 }
430 cdev->first_packet = 0;
431
432 for (stream = 0; stream < cdev->n_streams; stream++, i++) {
433 sub = cdev->sub_capture[stream];
434 if (cdev->input_panic)
435 usb_buf[i] = 0;
436
437 if (sub) {
438 struct snd_pcm_runtime *rt = sub->runtime;
439 char *audio_buf = rt->dma_area;
440 int sz = frames_to_bytes(rt, rt->buffer_size);
441 audio_buf[cdev->audio_in_buf_pos[stream]++] =
442 usb_buf[i];
443 cdev->period_in_count[stream]++;
444 if (cdev->audio_in_buf_pos[stream] == sz)
445 cdev->audio_in_buf_pos[stream] = 0;
446 }
447 }
448 }
449 }
450
451 static void read_in_urb_mode3(struct snd_usb_caiaqdev *cdev,
452 const struct urb *urb,
453 const struct usb_iso_packet_descriptor *iso)
454 {
455 unsigned char *usb_buf = urb->transfer_buffer + iso->offset;
456 struct device *dev = caiaqdev_to_dev(cdev);
457 int stream, i;
458
459 /* paranoia check */
460 if (iso->actual_length % (BYTES_PER_SAMPLE_USB * CHANNELS_PER_STREAM))
461 return;
462
463 for (i = 0; i < iso->actual_length;) {
464 for (stream = 0; stream < cdev->n_streams; stream++) {
465 struct snd_pcm_substream *sub = cdev->sub_capture[stream];
466 char *audio_buf = NULL;
467 int c, n, sz = 0;
468
469 if (sub && !cdev->input_panic) {
470 struct snd_pcm_runtime *rt = sub->runtime;
471 audio_buf = rt->dma_area;
472 sz = frames_to_bytes(rt, rt->buffer_size);
473 }
474
475 for (c = 0; c < CHANNELS_PER_STREAM; c++) {
476 /* 3 audio data bytes, followed by 1 check byte */
477 if (audio_buf) {
478 for (n = 0; n < BYTES_PER_SAMPLE; n++) {
479 audio_buf[cdev->audio_in_buf_pos[stream]++] = usb_buf[i+n];
480
481 if (cdev->audio_in_buf_pos[stream] == sz)
482 cdev->audio_in_buf_pos[stream] = 0;
483 }
484
485 cdev->period_in_count[stream] += BYTES_PER_SAMPLE;
486 }
487
488 i += BYTES_PER_SAMPLE;
489
490 if (usb_buf[i] != ((stream << 1) | c) &&
491 !cdev->first_packet) {
492 if (!cdev->input_panic)
493 dev_warn(dev, " EXPECTED: %02x got %02x, c %d, stream %d, i %d\n",
494 ((stream << 1) | c), usb_buf[i], c, stream, i);
495 cdev->input_panic = 1;
496 }
497
498 i++;
499 }
500 }
501 }
502
503 if (cdev->first_packet > 0)
504 cdev->first_packet--;
505 }
506
507 static void read_in_urb(struct snd_usb_caiaqdev *cdev,
508 const struct urb *urb,
509 const struct usb_iso_packet_descriptor *iso)
510 {
511 struct device *dev = caiaqdev_to_dev(cdev);
512
513 if (!cdev->streaming)
514 return;
515
516 if (iso->actual_length < cdev->bpp)
517 return;
518
519 switch (cdev->spec.data_alignment) {
520 case 0:
521 read_in_urb_mode0(cdev, urb, iso);
522 break;
523 case 2:
524 read_in_urb_mode2(cdev, urb, iso);
525 break;
526 case 3:
527 read_in_urb_mode3(cdev, urb, iso);
528 break;
529 }
530
531 if ((cdev->input_panic || cdev->output_panic) && !cdev->warned) {
532 dev_warn(dev, "streaming error detected %s %s\n",
533 cdev->input_panic ? "(input)" : "",
534 cdev->output_panic ? "(output)" : "");
535 cdev->warned = 1;
536 }
537 }
538
539 static void fill_out_urb_mode_0(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 struct snd_pcm_substream *sub;
545 int stream, i;
546
547 for (i = 0; i < iso->length;) {
548 for (stream = 0; stream < cdev->n_streams; stream++, i++) {
549 sub = cdev->sub_playback[stream];
550 if (sub) {
551 struct snd_pcm_runtime *rt = sub->runtime;
552 char *audio_buf = rt->dma_area;
553 int sz = frames_to_bytes(rt, rt->buffer_size);
554 usb_buf[i] =
555 audio_buf[cdev->audio_out_buf_pos[stream]];
556 cdev->period_out_count[stream]++;
557 cdev->audio_out_buf_pos[stream]++;
558 if (cdev->audio_out_buf_pos[stream] == sz)
559 cdev->audio_out_buf_pos[stream] = 0;
560 } else
561 usb_buf[i] = 0;
562 }
563
564 /* fill in the check bytes */
565 if (cdev->spec.data_alignment == 2 &&
566 i % (cdev->n_streams * BYTES_PER_SAMPLE_USB) ==
567 (cdev->n_streams * CHANNELS_PER_STREAM))
568 for (stream = 0; stream < cdev->n_streams; stream++, i++)
569 usb_buf[i] = MAKE_CHECKBYTE(cdev, stream, i);
570 }
571 }
572
573 static void fill_out_urb_mode_3(struct snd_usb_caiaqdev *cdev,
574 struct urb *urb,
575 const struct usb_iso_packet_descriptor *iso)
576 {
577 unsigned char *usb_buf = urb->transfer_buffer + iso->offset;
578 int stream, i;
579
580 for (i = 0; i < iso->length;) {
581 for (stream = 0; stream < cdev->n_streams; stream++) {
582 struct snd_pcm_substream *sub = cdev->sub_playback[stream];
583 char *audio_buf = NULL;
584 int c, n, sz = 0;
585
586 if (sub) {
587 struct snd_pcm_runtime *rt = sub->runtime;
588 audio_buf = rt->dma_area;
589 sz = frames_to_bytes(rt, rt->buffer_size);
590 }
591
592 for (c = 0; c < CHANNELS_PER_STREAM; c++) {
593 for (n = 0; n < BYTES_PER_SAMPLE; n++) {
594 if (audio_buf) {
595 usb_buf[i+n] = audio_buf[cdev->audio_out_buf_pos[stream]++];
596
597 if (cdev->audio_out_buf_pos[stream] == sz)
598 cdev->audio_out_buf_pos[stream] = 0;
599 } else {
600 usb_buf[i+n] = 0;
601 }
602 }
603
604 if (audio_buf)
605 cdev->period_out_count[stream] += BYTES_PER_SAMPLE;
606
607 i += BYTES_PER_SAMPLE;
608
609 /* fill in the check byte pattern */
610 usb_buf[i++] = (stream << 1) | c;
611 }
612 }
613 }
614 }
615
616 static inline void fill_out_urb(struct snd_usb_caiaqdev *cdev,
617 struct urb *urb,
618 const struct usb_iso_packet_descriptor *iso)
619 {
620 switch (cdev->spec.data_alignment) {
621 case 0:
622 case 2:
623 fill_out_urb_mode_0(cdev, urb, iso);
624 break;
625 case 3:
626 fill_out_urb_mode_3(cdev, urb, iso);
627 break;
628 }
629 }
630
631 static void read_completed(struct urb *urb)
632 {
633 struct snd_usb_caiaq_cb_info *info = urb->context;
634 struct snd_usb_caiaqdev *cdev;
635 struct device *dev;
636 struct urb *out = NULL;
637 int i, frame, len, send_it = 0, outframe = 0;
638 unsigned long flags;
639 size_t offset = 0;
640
641 if (urb->status || !info)
642 return;
643
644 cdev = info->cdev;
645 dev = caiaqdev_to_dev(cdev);
646
647 if (!cdev->streaming)
648 return;
649
650 /* find an unused output urb that is unused */
651 for (i = 0; i < N_URBS; i++)
652 if (test_and_set_bit(i, &cdev->outurb_active_mask) == 0) {
653 out = cdev->data_urbs_out[i];
654 break;
655 }
656
657 if (!out) {
658 dev_err(dev, "Unable to find an output urb to use\n");
659 goto requeue;
660 }
661
662 /* read the recently received packet and send back one which has
663 * the same layout */
664 for (frame = 0; frame < FRAMES_PER_URB; frame++) {
665 if (urb->iso_frame_desc[frame].status)
666 continue;
667
668 len = urb->iso_frame_desc[outframe].actual_length;
669 out->iso_frame_desc[outframe].length = len;
670 out->iso_frame_desc[outframe].actual_length = 0;
671 out->iso_frame_desc[outframe].offset = offset;
672 offset += len;
673
674 if (len > 0) {
675 spin_lock_irqsave(&cdev->spinlock, flags);
676 fill_out_urb(cdev, out, &out->iso_frame_desc[outframe]);
677 read_in_urb(cdev, urb, &urb->iso_frame_desc[frame]);
678 spin_unlock_irqrestore(&cdev->spinlock, flags);
679 check_for_elapsed_periods(cdev, cdev->sub_playback);
680 check_for_elapsed_periods(cdev, cdev->sub_capture);
681 send_it = 1;
682 }
683
684 outframe++;
685 }
686
687 if (send_it) {
688 out->number_of_packets = outframe;
689 usb_submit_urb(out, GFP_ATOMIC);
690 } else {
691 struct snd_usb_caiaq_cb_info *oinfo = out->context;
692 clear_bit(oinfo->index, &cdev->outurb_active_mask);
693 }
694
695 requeue:
696 /* re-submit inbound urb */
697 for (frame = 0; frame < FRAMES_PER_URB; frame++) {
698 urb->iso_frame_desc[frame].offset = BYTES_PER_FRAME * frame;
699 urb->iso_frame_desc[frame].length = BYTES_PER_FRAME;
700 urb->iso_frame_desc[frame].actual_length = 0;
701 }
702
703 urb->number_of_packets = FRAMES_PER_URB;
704 usb_submit_urb(urb, GFP_ATOMIC);
705 }
706
707 static void write_completed(struct urb *urb)
708 {
709 struct snd_usb_caiaq_cb_info *info = urb->context;
710 struct snd_usb_caiaqdev *cdev = info->cdev;
711
712 if (!cdev->output_running) {
713 cdev->output_running = 1;
714 wake_up(&cdev->prepare_wait_queue);
715 }
716
717 clear_bit(info->index, &cdev->outurb_active_mask);
718 }
719
720 static struct urb **alloc_urbs(struct snd_usb_caiaqdev *cdev, int dir, int *ret)
721 {
722 int i, frame;
723 struct urb **urbs;
724 struct usb_device *usb_dev = cdev->chip.dev;
725 unsigned int pipe;
726
727 pipe = (dir == SNDRV_PCM_STREAM_PLAYBACK) ?
728 usb_sndisocpipe(usb_dev, ENDPOINT_PLAYBACK) :
729 usb_rcvisocpipe(usb_dev, ENDPOINT_CAPTURE);
730
731 urbs = kmalloc_array(N_URBS, sizeof(*urbs), GFP_KERNEL);
732 if (!urbs) {
733 *ret = -ENOMEM;
734 return NULL;
735 }
736
737 for (i = 0; i < N_URBS; i++) {
738 urbs[i] = usb_alloc_urb(FRAMES_PER_URB, GFP_KERNEL);
739 if (!urbs[i]) {
740 *ret = -ENOMEM;
741 return urbs;
742 }
743
744 urbs[i]->transfer_buffer =
745 kmalloc_array(BYTES_PER_FRAME, FRAMES_PER_URB,
746 GFP_KERNEL);
747 if (!urbs[i]->transfer_buffer) {
748 *ret = -ENOMEM;
749 return urbs;
750 }
751
752 for (frame = 0; frame < FRAMES_PER_URB; frame++) {
753 struct usb_iso_packet_descriptor *iso =
754 &urbs[i]->iso_frame_desc[frame];
755
756 iso->offset = BYTES_PER_FRAME * frame;
757 iso->length = BYTES_PER_FRAME;
758 }
759
760 urbs[i]->dev = usb_dev;
761 urbs[i]->pipe = pipe;
762 urbs[i]->transfer_buffer_length = FRAMES_PER_URB
763 * BYTES_PER_FRAME;
764 urbs[i]->context = &cdev->data_cb_info[i];
765 urbs[i]->interval = 1;
766 urbs[i]->number_of_packets = FRAMES_PER_URB;
767 urbs[i]->complete = (dir == SNDRV_PCM_STREAM_CAPTURE) ?
768 read_completed : write_completed;
769 }
770
771 *ret = 0;
772 return urbs;
773 }
774
775 static void free_urbs(struct urb **urbs)
776 {
777 int i;
778
779 if (!urbs)
780 return;
781
782 for (i = 0; i < N_URBS; i++) {
783 if (!urbs[i])
784 continue;
785
786 usb_kill_urb(urbs[i]);
787 kfree(urbs[i]->transfer_buffer);
788 usb_free_urb(urbs[i]);
789 }
790
791 kfree(urbs);
792 }
793
794 int snd_usb_caiaq_audio_init(struct snd_usb_caiaqdev *cdev)
795 {
796 int i, ret;
797 struct device *dev = caiaqdev_to_dev(cdev);
798
799 cdev->n_audio_in = max(cdev->spec.num_analog_audio_in,
800 cdev->spec.num_digital_audio_in) /
801 CHANNELS_PER_STREAM;
802 cdev->n_audio_out = max(cdev->spec.num_analog_audio_out,
803 cdev->spec.num_digital_audio_out) /
804 CHANNELS_PER_STREAM;
805 cdev->n_streams = max(cdev->n_audio_in, cdev->n_audio_out);
806
807 dev_dbg(dev, "cdev->n_audio_in = %d\n", cdev->n_audio_in);
808 dev_dbg(dev, "cdev->n_audio_out = %d\n", cdev->n_audio_out);
809 dev_dbg(dev, "cdev->n_streams = %d\n", cdev->n_streams);
810
811 if (cdev->n_streams > MAX_STREAMS) {
812 dev_err(dev, "unable to initialize device, too many streams.\n");
813 return -EINVAL;
814 }
815
816 if (cdev->n_streams < 1) {
817 dev_err(dev, "bogus number of streams: %d\n", cdev->n_streams);
818 return -EINVAL;
819 }
820
821 ret = snd_pcm_new(cdev->chip.card, cdev->product_name, 0,
822 cdev->n_audio_out, cdev->n_audio_in, &cdev->pcm);
823
824 if (ret < 0) {
825 dev_err(dev, "snd_pcm_new() returned %d\n", ret);
826 return ret;
827 }
828
829 cdev->pcm->private_data = cdev;
830 strlcpy(cdev->pcm->name, cdev->product_name, sizeof(cdev->pcm->name));
831
832 memset(cdev->sub_playback, 0, sizeof(cdev->sub_playback));
833 memset(cdev->sub_capture, 0, sizeof(cdev->sub_capture));
834
835 memcpy(&cdev->pcm_info, &snd_usb_caiaq_pcm_hardware,
836 sizeof(snd_usb_caiaq_pcm_hardware));
837
838 /* setup samplerates */
839 cdev->samplerates = cdev->pcm_info.rates;
840 switch (cdev->chip.usb_id) {
841 case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_AK1):
842 case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_RIGKONTROL3):
843 case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_SESSIONIO):
844 case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_GUITARRIGMOBILE):
845 cdev->samplerates |= SNDRV_PCM_RATE_192000;
846 /* fall thru */
847 case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_AUDIO2DJ):
848 case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_AUDIO4DJ):
849 case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_AUDIO8DJ):
850 case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_TRAKTORAUDIO2):
851 cdev->samplerates |= SNDRV_PCM_RATE_88200;
852 break;
853 }
854
855 snd_pcm_set_ops(cdev->pcm, SNDRV_PCM_STREAM_PLAYBACK,
856 &snd_usb_caiaq_ops);
857 snd_pcm_set_ops(cdev->pcm, SNDRV_PCM_STREAM_CAPTURE,
858 &snd_usb_caiaq_ops);
859
860 cdev->data_cb_info =
861 kmalloc_array(N_URBS, sizeof(struct snd_usb_caiaq_cb_info),
862 GFP_KERNEL);
863
864 if (!cdev->data_cb_info)
865 return -ENOMEM;
866
867 cdev->outurb_active_mask = 0;
868 BUILD_BUG_ON(N_URBS > (sizeof(cdev->outurb_active_mask) * 8));
869
870 for (i = 0; i < N_URBS; i++) {
871 cdev->data_cb_info[i].cdev = cdev;
872 cdev->data_cb_info[i].index = i;
873 }
874
875 cdev->data_urbs_in = alloc_urbs(cdev, SNDRV_PCM_STREAM_CAPTURE, &ret);
876 if (ret < 0) {
877 kfree(cdev->data_cb_info);
878 free_urbs(cdev->data_urbs_in);
879 return ret;
880 }
881
882 cdev->data_urbs_out = alloc_urbs(cdev, SNDRV_PCM_STREAM_PLAYBACK, &ret);
883 if (ret < 0) {
884 kfree(cdev->data_cb_info);
885 free_urbs(cdev->data_urbs_in);
886 free_urbs(cdev->data_urbs_out);
887 return ret;
888 }
889
890 return 0;
891 }
892
893 void snd_usb_caiaq_audio_free(struct snd_usb_caiaqdev *cdev)
894 {
895 struct device *dev = caiaqdev_to_dev(cdev);
896
897 dev_dbg(dev, "%s(%p)\n", __func__, cdev);
898 stream_stop(cdev);
899 free_urbs(cdev->data_urbs_in);
900 free_urbs(cdev->data_urbs_out);
901 kfree(cdev->data_cb_info);
902 }
903
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