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Merge remote-tracking branches 'regulator/topic/tps65218' and 'regulator/topic/tps800...
[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_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 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 .mmap = snd_pcm_lib_mmap_vmalloc,
352 };
353
354 static void check_for_elapsed_periods(struct snd_usb_caiaqdev *cdev,
355 struct snd_pcm_substream **subs)
356 {
357 int stream, pb, *cnt;
358 struct snd_pcm_substream *sub;
359
360 for (stream = 0; stream < cdev->n_streams; stream++) {
361 sub = subs[stream];
362 if (!sub)
363 continue;
364
365 pb = snd_pcm_lib_period_bytes(sub);
366 cnt = (sub->stream == SNDRV_PCM_STREAM_PLAYBACK) ?
367 &cdev->period_out_count[stream] :
368 &cdev->period_in_count[stream];
369
370 if (*cnt >= pb) {
371 snd_pcm_period_elapsed(sub);
372 *cnt %= pb;
373 }
374 }
375 }
376
377 static void read_in_urb_mode0(struct snd_usb_caiaqdev *cdev,
378 const struct urb *urb,
379 const struct usb_iso_packet_descriptor *iso)
380 {
381 unsigned char *usb_buf = urb->transfer_buffer + iso->offset;
382 struct snd_pcm_substream *sub;
383 int stream, i;
384
385 if (all_substreams_zero(cdev->sub_capture))
386 return;
387
388 for (i = 0; i < iso->actual_length;) {
389 for (stream = 0; stream < cdev->n_streams; stream++, i++) {
390 sub = cdev->sub_capture[stream];
391 if (sub) {
392 struct snd_pcm_runtime *rt = sub->runtime;
393 char *audio_buf = rt->dma_area;
394 int sz = frames_to_bytes(rt, rt->buffer_size);
395 audio_buf[cdev->audio_in_buf_pos[stream]++]
396 = usb_buf[i];
397 cdev->period_in_count[stream]++;
398 if (cdev->audio_in_buf_pos[stream] == sz)
399 cdev->audio_in_buf_pos[stream] = 0;
400 }
401 }
402 }
403 }
404
405 static void read_in_urb_mode2(struct snd_usb_caiaqdev *cdev,
406 const struct urb *urb,
407 const struct usb_iso_packet_descriptor *iso)
408 {
409 unsigned char *usb_buf = urb->transfer_buffer + iso->offset;
410 unsigned char check_byte;
411 struct snd_pcm_substream *sub;
412 int stream, i;
413
414 for (i = 0; i < iso->actual_length;) {
415 if (i % (cdev->n_streams * BYTES_PER_SAMPLE_USB) == 0) {
416 for (stream = 0;
417 stream < cdev->n_streams;
418 stream++, i++) {
419 if (cdev->first_packet)
420 continue;
421
422 check_byte = MAKE_CHECKBYTE(cdev, stream, i);
423
424 if ((usb_buf[i] & 0x3f) != check_byte)
425 cdev->input_panic = 1;
426
427 if (usb_buf[i] & 0x80)
428 cdev->output_panic = 1;
429 }
430 }
431 cdev->first_packet = 0;
432
433 for (stream = 0; stream < cdev->n_streams; stream++, i++) {
434 sub = cdev->sub_capture[stream];
435 if (cdev->input_panic)
436 usb_buf[i] = 0;
437
438 if (sub) {
439 struct snd_pcm_runtime *rt = sub->runtime;
440 char *audio_buf = rt->dma_area;
441 int sz = frames_to_bytes(rt, rt->buffer_size);
442 audio_buf[cdev->audio_in_buf_pos[stream]++] =
443 usb_buf[i];
444 cdev->period_in_count[stream]++;
445 if (cdev->audio_in_buf_pos[stream] == sz)
446 cdev->audio_in_buf_pos[stream] = 0;
447 }
448 }
449 }
450 }
451
452 static void read_in_urb_mode3(struct snd_usb_caiaqdev *cdev,
453 const struct urb *urb,
454 const struct usb_iso_packet_descriptor *iso)
455 {
456 unsigned char *usb_buf = urb->transfer_buffer + iso->offset;
457 struct device *dev = caiaqdev_to_dev(cdev);
458 int stream, i;
459
460 /* paranoia check */
461 if (iso->actual_length % (BYTES_PER_SAMPLE_USB * CHANNELS_PER_STREAM))
462 return;
463
464 for (i = 0; i < iso->actual_length;) {
465 for (stream = 0; stream < cdev->n_streams; stream++) {
466 struct snd_pcm_substream *sub = cdev->sub_capture[stream];
467 char *audio_buf = NULL;
468 int c, n, sz = 0;
469
470 if (sub && !cdev->input_panic) {
471 struct snd_pcm_runtime *rt = sub->runtime;
472 audio_buf = rt->dma_area;
473 sz = frames_to_bytes(rt, rt->buffer_size);
474 }
475
476 for (c = 0; c < CHANNELS_PER_STREAM; c++) {
477 /* 3 audio data bytes, followed by 1 check byte */
478 if (audio_buf) {
479 for (n = 0; n < BYTES_PER_SAMPLE; n++) {
480 audio_buf[cdev->audio_in_buf_pos[stream]++] = usb_buf[i+n];
481
482 if (cdev->audio_in_buf_pos[stream] == sz)
483 cdev->audio_in_buf_pos[stream] = 0;
484 }
485
486 cdev->period_in_count[stream] += BYTES_PER_SAMPLE;
487 }
488
489 i += BYTES_PER_SAMPLE;
490
491 if (usb_buf[i] != ((stream << 1) | c) &&
492 !cdev->first_packet) {
493 if (!cdev->input_panic)
494 dev_warn(dev, " EXPECTED: %02x got %02x, c %d, stream %d, i %d\n",
495 ((stream << 1) | c), usb_buf[i], c, stream, i);
496 cdev->input_panic = 1;
497 }
498
499 i++;
500 }
501 }
502 }
503
504 if (cdev->first_packet > 0)
505 cdev->first_packet--;
506 }
507
508 static void read_in_urb(struct snd_usb_caiaqdev *cdev,
509 const struct urb *urb,
510 const struct usb_iso_packet_descriptor *iso)
511 {
512 struct device *dev = caiaqdev_to_dev(cdev);
513
514 if (!cdev->streaming)
515 return;
516
517 if (iso->actual_length < cdev->bpp)
518 return;
519
520 switch (cdev->spec.data_alignment) {
521 case 0:
522 read_in_urb_mode0(cdev, urb, iso);
523 break;
524 case 2:
525 read_in_urb_mode2(cdev, urb, iso);
526 break;
527 case 3:
528 read_in_urb_mode3(cdev, urb, iso);
529 break;
530 }
531
532 if ((cdev->input_panic || cdev->output_panic) && !cdev->warned) {
533 dev_warn(dev, "streaming error detected %s %s\n",
534 cdev->input_panic ? "(input)" : "",
535 cdev->output_panic ? "(output)" : "");
536 cdev->warned = 1;
537 }
538 }
539
540 static void fill_out_urb_mode_0(struct snd_usb_caiaqdev *cdev,
541 struct urb *urb,
542 const struct usb_iso_packet_descriptor *iso)
543 {
544 unsigned char *usb_buf = urb->transfer_buffer + iso->offset;
545 struct snd_pcm_substream *sub;
546 int stream, i;
547
548 for (i = 0; i < iso->length;) {
549 for (stream = 0; stream < cdev->n_streams; stream++, i++) {
550 sub = cdev->sub_playback[stream];
551 if (sub) {
552 struct snd_pcm_runtime *rt = sub->runtime;
553 char *audio_buf = rt->dma_area;
554 int sz = frames_to_bytes(rt, rt->buffer_size);
555 usb_buf[i] =
556 audio_buf[cdev->audio_out_buf_pos[stream]];
557 cdev->period_out_count[stream]++;
558 cdev->audio_out_buf_pos[stream]++;
559 if (cdev->audio_out_buf_pos[stream] == sz)
560 cdev->audio_out_buf_pos[stream] = 0;
561 } else
562 usb_buf[i] = 0;
563 }
564
565 /* fill in the check bytes */
566 if (cdev->spec.data_alignment == 2 &&
567 i % (cdev->n_streams * BYTES_PER_SAMPLE_USB) ==
568 (cdev->n_streams * CHANNELS_PER_STREAM))
569 for (stream = 0; stream < cdev->n_streams; stream++, i++)
570 usb_buf[i] = MAKE_CHECKBYTE(cdev, stream, i);
571 }
572 }
573
574 static void fill_out_urb_mode_3(struct snd_usb_caiaqdev *cdev,
575 struct urb *urb,
576 const struct usb_iso_packet_descriptor *iso)
577 {
578 unsigned char *usb_buf = urb->transfer_buffer + iso->offset;
579 int stream, i;
580
581 for (i = 0; i < iso->length;) {
582 for (stream = 0; stream < cdev->n_streams; stream++) {
583 struct snd_pcm_substream *sub = cdev->sub_playback[stream];
584 char *audio_buf = NULL;
585 int c, n, sz = 0;
586
587 if (sub) {
588 struct snd_pcm_runtime *rt = sub->runtime;
589 audio_buf = rt->dma_area;
590 sz = frames_to_bytes(rt, rt->buffer_size);
591 }
592
593 for (c = 0; c < CHANNELS_PER_STREAM; c++) {
594 for (n = 0; n < BYTES_PER_SAMPLE; n++) {
595 if (audio_buf) {
596 usb_buf[i+n] = audio_buf[cdev->audio_out_buf_pos[stream]++];
597
598 if (cdev->audio_out_buf_pos[stream] == sz)
599 cdev->audio_out_buf_pos[stream] = 0;
600 } else {
601 usb_buf[i+n] = 0;
602 }
603 }
604
605 if (audio_buf)
606 cdev->period_out_count[stream] += BYTES_PER_SAMPLE;
607
608 i += BYTES_PER_SAMPLE;
609
610 /* fill in the check byte pattern */
611 usb_buf[i++] = (stream << 1) | c;
612 }
613 }
614 }
615 }
616
617 static inline void fill_out_urb(struct snd_usb_caiaqdev *cdev,
618 struct urb *urb,
619 const struct usb_iso_packet_descriptor *iso)
620 {
621 switch (cdev->spec.data_alignment) {
622 case 0:
623 case 2:
624 fill_out_urb_mode_0(cdev, urb, iso);
625 break;
626 case 3:
627 fill_out_urb_mode_3(cdev, urb, iso);
628 break;
629 }
630 }
631
632 static void read_completed(struct urb *urb)
633 {
634 struct snd_usb_caiaq_cb_info *info = urb->context;
635 struct snd_usb_caiaqdev *cdev;
636 struct device *dev;
637 struct urb *out = NULL;
638 int i, frame, len, send_it = 0, outframe = 0;
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(&cdev->spinlock);
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(&cdev->spinlock);
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 struct device *dev = caiaqdev_to_dev(cdev);
726 unsigned int pipe;
727
728 pipe = (dir == SNDRV_PCM_STREAM_PLAYBACK) ?
729 usb_sndisocpipe(usb_dev, ENDPOINT_PLAYBACK) :
730 usb_rcvisocpipe(usb_dev, ENDPOINT_CAPTURE);
731
732 urbs = kmalloc(N_URBS * sizeof(*urbs), GFP_KERNEL);
733 if (!urbs) {
734 dev_err(dev, "unable to kmalloc() urbs, OOM!?\n");
735 *ret = -ENOMEM;
736 return NULL;
737 }
738
739 for (i = 0; i < N_URBS; i++) {
740 urbs[i] = usb_alloc_urb(FRAMES_PER_URB, GFP_KERNEL);
741 if (!urbs[i]) {
742 dev_err(dev, "unable to usb_alloc_urb(), OOM!?\n");
743 *ret = -ENOMEM;
744 return urbs;
745 }
746
747 urbs[i]->transfer_buffer =
748 kmalloc(FRAMES_PER_URB * BYTES_PER_FRAME, GFP_KERNEL);
749 if (!urbs[i]->transfer_buffer) {
750 dev_err(dev, "unable to kmalloc() transfer buffer, OOM!?\n");
751 *ret = -ENOMEM;
752 return urbs;
753 }
754
755 for (frame = 0; frame < FRAMES_PER_URB; frame++) {
756 struct usb_iso_packet_descriptor *iso =
757 &urbs[i]->iso_frame_desc[frame];
758
759 iso->offset = BYTES_PER_FRAME * frame;
760 iso->length = BYTES_PER_FRAME;
761 }
762
763 urbs[i]->dev = usb_dev;
764 urbs[i]->pipe = pipe;
765 urbs[i]->transfer_buffer_length = FRAMES_PER_URB
766 * BYTES_PER_FRAME;
767 urbs[i]->context = &cdev->data_cb_info[i];
768 urbs[i]->interval = 1;
769 urbs[i]->number_of_packets = FRAMES_PER_URB;
770 urbs[i]->complete = (dir == SNDRV_PCM_STREAM_CAPTURE) ?
771 read_completed : write_completed;
772 }
773
774 *ret = 0;
775 return urbs;
776 }
777
778 static void free_urbs(struct urb **urbs)
779 {
780 int i;
781
782 if (!urbs)
783 return;
784
785 for (i = 0; i < N_URBS; i++) {
786 if (!urbs[i])
787 continue;
788
789 usb_kill_urb(urbs[i]);
790 kfree(urbs[i]->transfer_buffer);
791 usb_free_urb(urbs[i]);
792 }
793
794 kfree(urbs);
795 }
796
797 int snd_usb_caiaq_audio_init(struct snd_usb_caiaqdev *cdev)
798 {
799 int i, ret;
800 struct device *dev = caiaqdev_to_dev(cdev);
801
802 cdev->n_audio_in = max(cdev->spec.num_analog_audio_in,
803 cdev->spec.num_digital_audio_in) /
804 CHANNELS_PER_STREAM;
805 cdev->n_audio_out = max(cdev->spec.num_analog_audio_out,
806 cdev->spec.num_digital_audio_out) /
807 CHANNELS_PER_STREAM;
808 cdev->n_streams = max(cdev->n_audio_in, cdev->n_audio_out);
809
810 dev_dbg(dev, "cdev->n_audio_in = %d\n", cdev->n_audio_in);
811 dev_dbg(dev, "cdev->n_audio_out = %d\n", cdev->n_audio_out);
812 dev_dbg(dev, "cdev->n_streams = %d\n", cdev->n_streams);
813
814 if (cdev->n_streams > MAX_STREAMS) {
815 dev_err(dev, "unable to initialize device, too many streams.\n");
816 return -EINVAL;
817 }
818
819 if (cdev->n_streams < 1) {
820 dev_err(dev, "bogus number of streams: %d\n", cdev->n_streams);
821 return -EINVAL;
822 }
823
824 ret = snd_pcm_new(cdev->chip.card, cdev->product_name, 0,
825 cdev->n_audio_out, cdev->n_audio_in, &cdev->pcm);
826
827 if (ret < 0) {
828 dev_err(dev, "snd_pcm_new() returned %d\n", ret);
829 return ret;
830 }
831
832 cdev->pcm->private_data = cdev;
833 strlcpy(cdev->pcm->name, cdev->product_name, sizeof(cdev->pcm->name));
834
835 memset(cdev->sub_playback, 0, sizeof(cdev->sub_playback));
836 memset(cdev->sub_capture, 0, sizeof(cdev->sub_capture));
837
838 memcpy(&cdev->pcm_info, &snd_usb_caiaq_pcm_hardware,
839 sizeof(snd_usb_caiaq_pcm_hardware));
840
841 /* setup samplerates */
842 cdev->samplerates = cdev->pcm_info.rates;
843 switch (cdev->chip.usb_id) {
844 case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_AK1):
845 case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_RIGKONTROL3):
846 case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_SESSIONIO):
847 case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_GUITARRIGMOBILE):
848 cdev->samplerates |= SNDRV_PCM_RATE_192000;
849 /* fall thru */
850 case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_AUDIO2DJ):
851 case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_AUDIO4DJ):
852 case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_AUDIO8DJ):
853 case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_TRAKTORAUDIO2):
854 cdev->samplerates |= SNDRV_PCM_RATE_88200;
855 break;
856 }
857
858 snd_pcm_set_ops(cdev->pcm, SNDRV_PCM_STREAM_PLAYBACK,
859 &snd_usb_caiaq_ops);
860 snd_pcm_set_ops(cdev->pcm, SNDRV_PCM_STREAM_CAPTURE,
861 &snd_usb_caiaq_ops);
862
863 cdev->data_cb_info =
864 kmalloc(sizeof(struct snd_usb_caiaq_cb_info) * N_URBS,
865 GFP_KERNEL);
866
867 if (!cdev->data_cb_info)
868 return -ENOMEM;
869
870 cdev->outurb_active_mask = 0;
871 BUILD_BUG_ON(N_URBS > (sizeof(cdev->outurb_active_mask) * 8));
872
873 for (i = 0; i < N_URBS; i++) {
874 cdev->data_cb_info[i].cdev = cdev;
875 cdev->data_cb_info[i].index = i;
876 }
877
878 cdev->data_urbs_in = alloc_urbs(cdev, SNDRV_PCM_STREAM_CAPTURE, &ret);
879 if (ret < 0) {
880 kfree(cdev->data_cb_info);
881 free_urbs(cdev->data_urbs_in);
882 return ret;
883 }
884
885 cdev->data_urbs_out = alloc_urbs(cdev, SNDRV_PCM_STREAM_PLAYBACK, &ret);
886 if (ret < 0) {
887 kfree(cdev->data_cb_info);
888 free_urbs(cdev->data_urbs_in);
889 free_urbs(cdev->data_urbs_out);
890 return ret;
891 }
892
893 return 0;
894 }
895
896 void snd_usb_caiaq_audio_free(struct snd_usb_caiaqdev *cdev)
897 {
898 struct device *dev = caiaqdev_to_dev(cdev);
899
900 dev_dbg(dev, "%s(%p)\n", __func__, cdev);
901 stream_stop(cdev);
902 free_urbs(cdev->data_urbs_in);
903 free_urbs(cdev->data_urbs_out);
904 kfree(cdev->data_cb_info);
905 }
906
Linux kernel - Deliverables
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