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ALSA: USB: adjust for changed 3.8 USB API
[deliverable/linux.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_malloc_pages(sub, params_buffer_bytes(hw_params));
187 }
188
189 static int snd_usb_caiaq_pcm_hw_free(struct snd_pcm_substream *sub)
190 {
191 struct snd_usb_caiaqdev *cdev = snd_pcm_substream_chip(sub);
192 deactivate_substream(cdev, sub);
193 return snd_pcm_lib_free_pages(sub);
194 }
195
196 /* this should probably go upstream */
197 #if SNDRV_PCM_RATE_5512 != 1 << 0 || SNDRV_PCM_RATE_192000 != 1 << 12
198 #error "Change this table"
199 #endif
200
201 static unsigned int rates[] = { 5512, 8000, 11025, 16000, 22050, 32000, 44100,
202 48000, 64000, 88200, 96000, 176400, 192000 };
203
204 static int snd_usb_caiaq_pcm_prepare(struct snd_pcm_substream *substream)
205 {
206 int bytes_per_sample, bpp, ret, i;
207 int index = substream->number;
208 struct snd_usb_caiaqdev *cdev = snd_pcm_substream_chip(substream);
209 struct snd_pcm_runtime *runtime = substream->runtime;
210 struct device *dev = caiaqdev_to_dev(cdev);
211
212 dev_dbg(dev, "%s(%p)\n", __func__, substream);
213
214 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
215 int out_pos;
216
217 switch (cdev->spec.data_alignment) {
218 case 0:
219 case 2:
220 out_pos = BYTES_PER_SAMPLE + 1;
221 break;
222 case 3:
223 default:
224 out_pos = 0;
225 break;
226 }
227
228 cdev->period_out_count[index] = out_pos;
229 cdev->audio_out_buf_pos[index] = out_pos;
230 } else {
231 int in_pos;
232
233 switch (cdev->spec.data_alignment) {
234 case 0:
235 in_pos = BYTES_PER_SAMPLE + 2;
236 break;
237 case 2:
238 in_pos = BYTES_PER_SAMPLE;
239 break;
240 case 3:
241 default:
242 in_pos = 0;
243 break;
244 }
245
246 cdev->period_in_count[index] = in_pos;
247 cdev->audio_in_buf_pos[index] = in_pos;
248 }
249
250 if (cdev->streaming)
251 return 0;
252
253 /* the first client that opens a stream defines the sample rate
254 * setting for all subsequent calls, until the last client closed. */
255 for (i=0; i < ARRAY_SIZE(rates); i++)
256 if (runtime->rate == rates[i])
257 cdev->pcm_info.rates = 1 << i;
258
259 snd_pcm_limit_hw_rates(runtime);
260
261 bytes_per_sample = BYTES_PER_SAMPLE;
262 if (cdev->spec.data_alignment >= 2)
263 bytes_per_sample++;
264
265 bpp = ((runtime->rate / 8000) + CLOCK_DRIFT_TOLERANCE)
266 * bytes_per_sample * CHANNELS_PER_STREAM * cdev->n_streams;
267
268 if (bpp > MAX_ENDPOINT_SIZE)
269 bpp = MAX_ENDPOINT_SIZE;
270
271 ret = snd_usb_caiaq_set_audio_params(cdev, runtime->rate,
272 runtime->sample_bits, bpp);
273 if (ret)
274 return ret;
275
276 ret = stream_start(cdev);
277 if (ret)
278 return ret;
279
280 cdev->output_running = 0;
281 wait_event_timeout(cdev->prepare_wait_queue, cdev->output_running, HZ);
282 if (!cdev->output_running) {
283 stream_stop(cdev);
284 return -EPIPE;
285 }
286
287 return 0;
288 }
289
290 static int snd_usb_caiaq_pcm_trigger(struct snd_pcm_substream *sub, int cmd)
291 {
292 struct snd_usb_caiaqdev *cdev = snd_pcm_substream_chip(sub);
293 struct device *dev = caiaqdev_to_dev(cdev);
294
295 dev_dbg(dev, "%s(%p) cmd %d\n", __func__, sub, cmd);
296
297 switch (cmd) {
298 case SNDRV_PCM_TRIGGER_START:
299 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
300 activate_substream(cdev, sub);
301 break;
302 case SNDRV_PCM_TRIGGER_STOP:
303 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
304 deactivate_substream(cdev, sub);
305 break;
306 default:
307 return -EINVAL;
308 }
309
310 return 0;
311 }
312
313 static snd_pcm_uframes_t
314 snd_usb_caiaq_pcm_pointer(struct snd_pcm_substream *sub)
315 {
316 int index = sub->number;
317 struct snd_usb_caiaqdev *cdev = snd_pcm_substream_chip(sub);
318 snd_pcm_uframes_t ptr;
319
320 spin_lock(&cdev->spinlock);
321
322 if (cdev->input_panic || cdev->output_panic) {
323 ptr = SNDRV_PCM_POS_XRUN;
324 goto unlock;
325 }
326
327 if (sub->stream == SNDRV_PCM_STREAM_PLAYBACK)
328 ptr = bytes_to_frames(sub->runtime,
329 cdev->audio_out_buf_pos[index]);
330 else
331 ptr = bytes_to_frames(sub->runtime,
332 cdev->audio_in_buf_pos[index]);
333
334 unlock:
335 spin_unlock(&cdev->spinlock);
336 return ptr;
337 }
338
339 /* operators for both playback and capture */
340 static struct snd_pcm_ops snd_usb_caiaq_ops = {
341 .open = snd_usb_caiaq_substream_open,
342 .close = snd_usb_caiaq_substream_close,
343 .ioctl = snd_pcm_lib_ioctl,
344 .hw_params = snd_usb_caiaq_pcm_hw_params,
345 .hw_free = snd_usb_caiaq_pcm_hw_free,
346 .prepare = snd_usb_caiaq_pcm_prepare,
347 .trigger = snd_usb_caiaq_pcm_trigger,
348 .pointer = snd_usb_caiaq_pcm_pointer
349 };
350
351 static void check_for_elapsed_periods(struct snd_usb_caiaqdev *cdev,
352 struct snd_pcm_substream **subs)
353 {
354 int stream, pb, *cnt;
355 struct snd_pcm_substream *sub;
356
357 for (stream = 0; stream < cdev->n_streams; stream++) {
358 sub = subs[stream];
359 if (!sub)
360 continue;
361
362 pb = snd_pcm_lib_period_bytes(sub);
363 cnt = (sub->stream == SNDRV_PCM_STREAM_PLAYBACK) ?
364 &cdev->period_out_count[stream] :
365 &cdev->period_in_count[stream];
366
367 if (*cnt >= pb) {
368 snd_pcm_period_elapsed(sub);
369 *cnt %= pb;
370 }
371 }
372 }
373
374 static void read_in_urb_mode0(struct snd_usb_caiaqdev *cdev,
375 const struct urb *urb,
376 const struct usb_iso_packet_descriptor *iso)
377 {
378 unsigned char *usb_buf = urb->transfer_buffer + iso->offset;
379 struct snd_pcm_substream *sub;
380 int stream, i;
381
382 if (all_substreams_zero(cdev->sub_capture))
383 return;
384
385 for (i = 0; i < iso->actual_length;) {
386 for (stream = 0; stream < cdev->n_streams; stream++, i++) {
387 sub = cdev->sub_capture[stream];
388 if (sub) {
389 struct snd_pcm_runtime *rt = sub->runtime;
390 char *audio_buf = rt->dma_area;
391 int sz = frames_to_bytes(rt, rt->buffer_size);
392 audio_buf[cdev->audio_in_buf_pos[stream]++]
393 = usb_buf[i];
394 cdev->period_in_count[stream]++;
395 if (cdev->audio_in_buf_pos[stream] == sz)
396 cdev->audio_in_buf_pos[stream] = 0;
397 }
398 }
399 }
400 }
401
402 static void read_in_urb_mode2(struct snd_usb_caiaqdev *cdev,
403 const struct urb *urb,
404 const struct usb_iso_packet_descriptor *iso)
405 {
406 unsigned char *usb_buf = urb->transfer_buffer + iso->offset;
407 unsigned char check_byte;
408 struct snd_pcm_substream *sub;
409 int stream, i;
410
411 for (i = 0; i < iso->actual_length;) {
412 if (i % (cdev->n_streams * BYTES_PER_SAMPLE_USB) == 0) {
413 for (stream = 0;
414 stream < cdev->n_streams;
415 stream++, i++) {
416 if (cdev->first_packet)
417 continue;
418
419 check_byte = MAKE_CHECKBYTE(cdev, stream, i);
420
421 if ((usb_buf[i] & 0x3f) != check_byte)
422 cdev->input_panic = 1;
423
424 if (usb_buf[i] & 0x80)
425 cdev->output_panic = 1;
426 }
427 }
428 cdev->first_packet = 0;
429
430 for (stream = 0; stream < cdev->n_streams; stream++, i++) {
431 sub = cdev->sub_capture[stream];
432 if (cdev->input_panic)
433 usb_buf[i] = 0;
434
435 if (sub) {
436 struct snd_pcm_runtime *rt = sub->runtime;
437 char *audio_buf = rt->dma_area;
438 int sz = frames_to_bytes(rt, rt->buffer_size);
439 audio_buf[cdev->audio_in_buf_pos[stream]++] =
440 usb_buf[i];
441 cdev->period_in_count[stream]++;
442 if (cdev->audio_in_buf_pos[stream] == sz)
443 cdev->audio_in_buf_pos[stream] = 0;
444 }
445 }
446 }
447 }
448
449 static void read_in_urb_mode3(struct snd_usb_caiaqdev *cdev,
450 const struct urb *urb,
451 const struct usb_iso_packet_descriptor *iso)
452 {
453 unsigned char *usb_buf = urb->transfer_buffer + iso->offset;
454 struct device *dev = caiaqdev_to_dev(cdev);
455 int stream, i;
456
457 /* paranoia check */
458 if (iso->actual_length % (BYTES_PER_SAMPLE_USB * CHANNELS_PER_STREAM))
459 return;
460
461 for (i = 0; i < iso->actual_length;) {
462 for (stream = 0; stream < cdev->n_streams; stream++) {
463 struct snd_pcm_substream *sub = cdev->sub_capture[stream];
464 char *audio_buf = NULL;
465 int c, n, sz = 0;
466
467 if (sub && !cdev->input_panic) {
468 struct snd_pcm_runtime *rt = sub->runtime;
469 audio_buf = rt->dma_area;
470 sz = frames_to_bytes(rt, rt->buffer_size);
471 }
472
473 for (c = 0; c < CHANNELS_PER_STREAM; c++) {
474 /* 3 audio data bytes, followed by 1 check byte */
475 if (audio_buf) {
476 for (n = 0; n < BYTES_PER_SAMPLE; n++) {
477 audio_buf[cdev->audio_in_buf_pos[stream]++] = usb_buf[i+n];
478
479 if (cdev->audio_in_buf_pos[stream] == sz)
480 cdev->audio_in_buf_pos[stream] = 0;
481 }
482
483 cdev->period_in_count[stream] += BYTES_PER_SAMPLE;
484 }
485
486 i += BYTES_PER_SAMPLE;
487
488 if (usb_buf[i] != ((stream << 1) | c) &&
489 !cdev->first_packet) {
490 if (!cdev->input_panic)
491 dev_warn(dev, " EXPECTED: %02x got %02x, c %d, stream %d, i %d\n",
492 ((stream << 1) | c), usb_buf[i], c, stream, i);
493 cdev->input_panic = 1;
494 }
495
496 i++;
497 }
498 }
499 }
500
501 if (cdev->first_packet > 0)
502 cdev->first_packet--;
503 }
504
505 static void read_in_urb(struct snd_usb_caiaqdev *cdev,
506 const struct urb *urb,
507 const struct usb_iso_packet_descriptor *iso)
508 {
509 struct device *dev = caiaqdev_to_dev(cdev);
510
511 if (!cdev->streaming)
512 return;
513
514 if (iso->actual_length < cdev->bpp)
515 return;
516
517 switch (cdev->spec.data_alignment) {
518 case 0:
519 read_in_urb_mode0(cdev, urb, iso);
520 break;
521 case 2:
522 read_in_urb_mode2(cdev, urb, iso);
523 break;
524 case 3:
525 read_in_urb_mode3(cdev, urb, iso);
526 break;
527 }
528
529 if ((cdev->input_panic || cdev->output_panic) && !cdev->warned) {
530 dev_warn(dev, "streaming error detected %s %s\n",
531 cdev->input_panic ? "(input)" : "",
532 cdev->output_panic ? "(output)" : "");
533 cdev->warned = 1;
534 }
535 }
536
537 static void fill_out_urb_mode_0(struct snd_usb_caiaqdev *cdev,
538 struct urb *urb,
539 const struct usb_iso_packet_descriptor *iso)
540 {
541 unsigned char *usb_buf = urb->transfer_buffer + iso->offset;
542 struct snd_pcm_substream *sub;
543 int stream, i;
544
545 for (i = 0; i < iso->length;) {
546 for (stream = 0; stream < cdev->n_streams; stream++, i++) {
547 sub = cdev->sub_playback[stream];
548 if (sub) {
549 struct snd_pcm_runtime *rt = sub->runtime;
550 char *audio_buf = rt->dma_area;
551 int sz = frames_to_bytes(rt, rt->buffer_size);
552 usb_buf[i] =
553 audio_buf[cdev->audio_out_buf_pos[stream]];
554 cdev->period_out_count[stream]++;
555 cdev->audio_out_buf_pos[stream]++;
556 if (cdev->audio_out_buf_pos[stream] == sz)
557 cdev->audio_out_buf_pos[stream] = 0;
558 } else
559 usb_buf[i] = 0;
560 }
561
562 /* fill in the check bytes */
563 if (cdev->spec.data_alignment == 2 &&
564 i % (cdev->n_streams * BYTES_PER_SAMPLE_USB) ==
565 (cdev->n_streams * CHANNELS_PER_STREAM))
566 for (stream = 0; stream < cdev->n_streams; stream++, i++)
567 usb_buf[i] = MAKE_CHECKBYTE(cdev, stream, i);
568 }
569 }
570
571 static void fill_out_urb_mode_3(struct snd_usb_caiaqdev *cdev,
572 struct urb *urb,
573 const struct usb_iso_packet_descriptor *iso)
574 {
575 unsigned char *usb_buf = urb->transfer_buffer + iso->offset;
576 int stream, i;
577
578 for (i = 0; i < iso->length;) {
579 for (stream = 0; stream < cdev->n_streams; stream++) {
580 struct snd_pcm_substream *sub = cdev->sub_playback[stream];
581 char *audio_buf = NULL;
582 int c, n, sz = 0;
583
584 if (sub) {
585 struct snd_pcm_runtime *rt = sub->runtime;
586 audio_buf = rt->dma_area;
587 sz = frames_to_bytes(rt, rt->buffer_size);
588 }
589
590 for (c = 0; c < CHANNELS_PER_STREAM; c++) {
591 for (n = 0; n < BYTES_PER_SAMPLE; n++) {
592 if (audio_buf) {
593 usb_buf[i+n] = audio_buf[cdev->audio_out_buf_pos[stream]++];
594
595 if (cdev->audio_out_buf_pos[stream] == sz)
596 cdev->audio_out_buf_pos[stream] = 0;
597 } else {
598 usb_buf[i+n] = 0;
599 }
600 }
601
602 if (audio_buf)
603 cdev->period_out_count[stream] += BYTES_PER_SAMPLE;
604
605 i += BYTES_PER_SAMPLE;
606
607 /* fill in the check byte pattern */
608 usb_buf[i++] = (stream << 1) | c;
609 }
610 }
611 }
612 }
613
614 static inline void fill_out_urb(struct snd_usb_caiaqdev *cdev,
615 struct urb *urb,
616 const struct usb_iso_packet_descriptor *iso)
617 {
618 switch (cdev->spec.data_alignment) {
619 case 0:
620 case 2:
621 fill_out_urb_mode_0(cdev, urb, iso);
622 break;
623 case 3:
624 fill_out_urb_mode_3(cdev, urb, iso);
625 break;
626 }
627 }
628
629 static void read_completed(struct urb *urb)
630 {
631 struct snd_usb_caiaq_cb_info *info = urb->context;
632 struct snd_usb_caiaqdev *cdev;
633 struct device *dev;
634 struct urb *out = NULL;
635 int i, frame, len, send_it = 0, outframe = 0;
636 size_t offset = 0;
637
638 if (urb->status || !info)
639 return;
640
641 cdev = info->cdev;
642 dev = caiaqdev_to_dev(cdev);
643
644 if (!cdev->streaming)
645 return;
646
647 /* find an unused output urb that is unused */
648 for (i = 0; i < N_URBS; i++)
649 if (test_and_set_bit(i, &cdev->outurb_active_mask) == 0) {
650 out = cdev->data_urbs_out[i];
651 break;
652 }
653
654 if (!out) {
655 dev_err(dev, "Unable to find an output urb to use\n");
656 goto requeue;
657 }
658
659 /* read the recently received packet and send back one which has
660 * the same layout */
661 for (frame = 0; frame < FRAMES_PER_URB; frame++) {
662 if (urb->iso_frame_desc[frame].status)
663 continue;
664
665 len = urb->iso_frame_desc[outframe].actual_length;
666 out->iso_frame_desc[outframe].length = len;
667 out->iso_frame_desc[outframe].actual_length = 0;
668 out->iso_frame_desc[outframe].offset = offset;
669 offset += len;
670
671 if (len > 0) {
672 spin_lock(&cdev->spinlock);
673 fill_out_urb(cdev, out, &out->iso_frame_desc[outframe]);
674 read_in_urb(cdev, urb, &urb->iso_frame_desc[frame]);
675 spin_unlock(&cdev->spinlock);
676 check_for_elapsed_periods(cdev, cdev->sub_playback);
677 check_for_elapsed_periods(cdev, cdev->sub_capture);
678 send_it = 1;
679 }
680
681 outframe++;
682 }
683
684 if (send_it) {
685 out->number_of_packets = outframe;
686 usb_submit_urb(out, GFP_ATOMIC);
687 } else {
688 struct snd_usb_caiaq_cb_info *oinfo = out->context;
689 clear_bit(oinfo->index, &cdev->outurb_active_mask);
690 }
691
692 requeue:
693 /* re-submit inbound urb */
694 for (frame = 0; frame < FRAMES_PER_URB; frame++) {
695 urb->iso_frame_desc[frame].offset = BYTES_PER_FRAME * frame;
696 urb->iso_frame_desc[frame].length = BYTES_PER_FRAME;
697 urb->iso_frame_desc[frame].actual_length = 0;
698 }
699
700 urb->number_of_packets = FRAMES_PER_URB;
701 usb_submit_urb(urb, GFP_ATOMIC);
702 }
703
704 static void write_completed(struct urb *urb)
705 {
706 struct snd_usb_caiaq_cb_info *info = urb->context;
707 struct snd_usb_caiaqdev *cdev = info->cdev;
708
709 if (!cdev->output_running) {
710 cdev->output_running = 1;
711 wake_up(&cdev->prepare_wait_queue);
712 }
713
714 clear_bit(info->index, &cdev->outurb_active_mask);
715 }
716
717 static struct urb **alloc_urbs(struct snd_usb_caiaqdev *cdev, int dir, int *ret)
718 {
719 int i, frame;
720 struct urb **urbs;
721 struct usb_device *usb_dev = cdev->chip.dev;
722 struct device *dev = caiaqdev_to_dev(cdev);
723 unsigned int pipe;
724
725 pipe = (dir == SNDRV_PCM_STREAM_PLAYBACK) ?
726 usb_sndisocpipe(usb_dev, ENDPOINT_PLAYBACK) :
727 usb_rcvisocpipe(usb_dev, ENDPOINT_CAPTURE);
728
729 urbs = kmalloc(N_URBS * sizeof(*urbs), GFP_KERNEL);
730 if (!urbs) {
731 dev_err(dev, "unable to kmalloc() urbs, OOM!?\n");
732 *ret = -ENOMEM;
733 return NULL;
734 }
735
736 for (i = 0; i < N_URBS; i++) {
737 urbs[i] = usb_alloc_urb(FRAMES_PER_URB, GFP_KERNEL);
738 if (!urbs[i]) {
739 dev_err(dev, "unable to usb_alloc_urb(), OOM!?\n");
740 *ret = -ENOMEM;
741 return urbs;
742 }
743
744 urbs[i]->transfer_buffer =
745 kmalloc(FRAMES_PER_URB * BYTES_PER_FRAME, GFP_KERNEL);
746 if (!urbs[i]->transfer_buffer) {
747 dev_err(dev, "unable to kmalloc() transfer buffer, OOM!?\n");
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 ret = snd_pcm_new(cdev->chip.card, cdev->product_name, 0,
817 cdev->n_audio_out, cdev->n_audio_in, &cdev->pcm);
818
819 if (ret < 0) {
820 dev_err(dev, "snd_pcm_new() returned %d\n", ret);
821 return ret;
822 }
823
824 cdev->pcm->private_data = cdev;
825 strlcpy(cdev->pcm->name, cdev->product_name, sizeof(cdev->pcm->name));
826
827 memset(cdev->sub_playback, 0, sizeof(cdev->sub_playback));
828 memset(cdev->sub_capture, 0, sizeof(cdev->sub_capture));
829
830 memcpy(&cdev->pcm_info, &snd_usb_caiaq_pcm_hardware,
831 sizeof(snd_usb_caiaq_pcm_hardware));
832
833 /* setup samplerates */
834 cdev->samplerates = cdev->pcm_info.rates;
835 switch (cdev->chip.usb_id) {
836 case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_AK1):
837 case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_RIGKONTROL3):
838 case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_SESSIONIO):
839 case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_GUITARRIGMOBILE):
840 cdev->samplerates |= SNDRV_PCM_RATE_192000;
841 /* fall thru */
842 case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_AUDIO2DJ):
843 case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_AUDIO4DJ):
844 case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_AUDIO8DJ):
845 case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_TRAKTORAUDIO2):
846 cdev->samplerates |= SNDRV_PCM_RATE_88200;
847 break;
848 }
849
850 snd_pcm_set_ops(cdev->pcm, SNDRV_PCM_STREAM_PLAYBACK,
851 &snd_usb_caiaq_ops);
852 snd_pcm_set_ops(cdev->pcm, SNDRV_PCM_STREAM_CAPTURE,
853 &snd_usb_caiaq_ops);
854
855 snd_pcm_lib_preallocate_pages_for_all(cdev->pcm,
856 SNDRV_DMA_TYPE_CONTINUOUS,
857 snd_dma_continuous_data(GFP_KERNEL),
858 MAX_BUFFER_SIZE, MAX_BUFFER_SIZE);
859
860 cdev->data_cb_info =
861 kmalloc(sizeof(struct snd_usb_caiaq_cb_info) * N_URBS,
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
Linux kernel - Deliverables
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