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added 2.6.29.6 aldebaran kernel
[nao-ulib.git] / kernel / 2.6.29.6-aldebaran-rt / sound / usb / caiaq / caiaq-audio.c
blobb3a60332583534735cfd54504cc8141cdb4587cd
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/init.h>
20 #include <linux/module.h>
21 #include <linux/moduleparam.h>
22 #include <linux/interrupt.h>
23 #include <linux/usb.h>
24 #include <linux/spinlock.h>
25 #include <sound/core.h>
26 #include <sound/initval.h>
27 #include <sound/pcm.h>
28 #include <sound/rawmidi.h>
29 #include <linux/input.h>
30
31 #include "caiaq-device.h"
32 #include "caiaq-audio.h"
33
34 #define N_URBS 32
35 #define CLOCK_DRIFT_TOLERANCE 5
36 #define FRAMES_PER_URB 8
37 #define BYTES_PER_FRAME 512
38 #define CHANNELS_PER_STREAM 2
39 #define BYTES_PER_SAMPLE 3
40 #define BYTES_PER_SAMPLE_USB 4
41 #define MAX_BUFFER_SIZE (128*1024)
42 #define MAX_ENDPOINT_SIZE 512
43
44 #define ENDPOINT_CAPTURE 2
45 #define ENDPOINT_PLAYBACK 6
46
47 #define MAKE_CHECKBYTE(dev,stream,i) \
48 (stream << 1) | (~(i / (dev->n_streams * BYTES_PER_SAMPLE_USB)) & 1)
49
50 static struct snd_pcm_hardware snd_usb_caiaq_pcm_hardware = {
51 .info = (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
52 SNDRV_PCM_INFO_BLOCK_TRANSFER),
53 .formats = SNDRV_PCM_FMTBIT_S24_3BE,
54 .rates = (SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000 |
55 SNDRV_PCM_RATE_96000),
56 .rate_min = 44100,
57 .rate_max = 0, /* will overwrite later */
58 .channels_min = CHANNELS_PER_STREAM,
59 .channels_max = CHANNELS_PER_STREAM,
60 .buffer_bytes_max = MAX_BUFFER_SIZE,
61 .period_bytes_min = 128,
62 .period_bytes_max = MAX_BUFFER_SIZE,
63 .periods_min = 1,
64 .periods_max = 1024,
65 };
66
67 static void
68 activate_substream(struct snd_usb_caiaqdev *dev,
69 struct snd_pcm_substream *sub)
70 {
71 if (sub->stream == SNDRV_PCM_STREAM_PLAYBACK)
72 dev->sub_playback[sub->number] = sub;
73 else
74 dev->sub_capture[sub->number] = sub;
75 }
76
77 static void
78 deactivate_substream(struct snd_usb_caiaqdev *dev,
79 struct snd_pcm_substream *sub)
80 {
81 unsigned long flags;
82 spin_lock_irqsave(&dev->spinlock, flags);
83
84 if (sub->stream == SNDRV_PCM_STREAM_PLAYBACK)
85 dev->sub_playback[sub->number] = NULL;
86 else
87 dev->sub_capture[sub->number] = NULL;
88
89 spin_unlock_irqrestore(&dev->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 *dev)
103 {
104 int i, ret;
105
106 debug("%s(%p)\n", __func__, dev);
107
108 if (dev->streaming)
109 return -EINVAL;
110
111 memset(dev->sub_playback, 0, sizeof(dev->sub_playback));
112 memset(dev->sub_capture, 0, sizeof(dev->sub_capture));
113 dev->input_panic = 0;
114 dev->output_panic = 0;
115 dev->first_packet = 1;
116 dev->streaming = 1;
117
118 for (i = 0; i < N_URBS; i++) {
119 ret = usb_submit_urb(dev->data_urbs_in[i], GFP_ATOMIC);
120 if (ret) {
121 log("unable to trigger read #%d! (ret %d)\n", i, ret);
122 dev->streaming = 0;
123 return -EPIPE;
124 }
125 }
126
127 return 0;
128 }
129
130 static void stream_stop(struct snd_usb_caiaqdev *dev)
131 {
132 int i;
133
134 debug("%s(%p)\n", __func__, dev);
135 if (!dev->streaming)
136 return;
137
138 dev->streaming = 0;
139
140 for (i = 0; i < N_URBS; i++) {
141 usb_kill_urb(dev->data_urbs_in[i]);
142 usb_kill_urb(dev->data_urbs_out[i]);
143 }
144 }
145
146 static int snd_usb_caiaq_substream_open(struct snd_pcm_substream *substream)
147 {
148 struct snd_usb_caiaqdev *dev = snd_pcm_substream_chip(substream);
149 debug("%s(%p)\n", __func__, substream);
150 substream->runtime->hw = dev->pcm_info;
151 snd_pcm_limit_hw_rates(substream->runtime);
152 return 0;
153 }
154
155 static int snd_usb_caiaq_substream_close(struct snd_pcm_substream *substream)
156 {
157 struct snd_usb_caiaqdev *dev = snd_pcm_substream_chip(substream);
158
159 debug("%s(%p)\n", __func__, substream);
160 if (all_substreams_zero(dev->sub_playback) &&
161 all_substreams_zero(dev->sub_capture)) {
162 /* when the last client has stopped streaming,
163 * all sample rates are allowed again */
164 stream_stop(dev);
165 dev->pcm_info.rates = dev->samplerates;
166 }
167
168 return 0;
169 }
170
171 static int snd_usb_caiaq_pcm_hw_params(struct snd_pcm_substream *sub,
172 struct snd_pcm_hw_params *hw_params)
173 {
174 debug("%s(%p)\n", __func__, sub);
175 return snd_pcm_lib_malloc_pages(sub, params_buffer_bytes(hw_params));
176 }
177
178 static int snd_usb_caiaq_pcm_hw_free(struct snd_pcm_substream *sub)
179 {
180 struct snd_usb_caiaqdev *dev = snd_pcm_substream_chip(sub);
181 debug("%s(%p)\n", __func__, sub);
182 deactivate_substream(dev, sub);
183 return snd_pcm_lib_free_pages(sub);
184 }
185
186 /* this should probably go upstream */
187 #if SNDRV_PCM_RATE_5512 != 1 << 0 || SNDRV_PCM_RATE_192000 != 1 << 12
188 #error "Change this table"
189 #endif
190
191 static unsigned int rates[] = { 5512, 8000, 11025, 16000, 22050, 32000, 44100,
192 48000, 64000, 88200, 96000, 176400, 192000 };
193
194 static int snd_usb_caiaq_pcm_prepare(struct snd_pcm_substream *substream)
195 {
196 int bytes_per_sample, bpp, ret, i;
197 int index = substream->number;
198 struct snd_usb_caiaqdev *dev = snd_pcm_substream_chip(substream);
199 struct snd_pcm_runtime *runtime = substream->runtime;
200
201 debug("%s(%p)\n", __func__, substream);
202
203 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
204 dev->audio_out_buf_pos[index] = BYTES_PER_SAMPLE + 1;
205 else
206 dev->audio_in_buf_pos[index] = BYTES_PER_SAMPLE;
207
208 if (dev->streaming)
209 return 0;
210
211 /* the first client that opens a stream defines the sample rate
212 * setting for all subsequent calls, until the last client closed. */
213 for (i=0; i < ARRAY_SIZE(rates); i++)
214 if (runtime->rate == rates[i])
215 dev->pcm_info.rates = 1 << i;
216
217 snd_pcm_limit_hw_rates(runtime);
218
219 bytes_per_sample = BYTES_PER_SAMPLE;
220 if (dev->spec.data_alignment == 2)
221 bytes_per_sample++;
222
223 bpp = ((runtime->rate / 8000) + CLOCK_DRIFT_TOLERANCE)
224 * bytes_per_sample * CHANNELS_PER_STREAM * dev->n_streams;
225
226 if (bpp > MAX_ENDPOINT_SIZE)
227 bpp = MAX_ENDPOINT_SIZE;
228
229 ret = snd_usb_caiaq_set_audio_params(dev, runtime->rate,
230 runtime->sample_bits, bpp);
231 if (ret)
232 return ret;
233
234 ret = stream_start(dev);
235 if (ret)
236 return ret;
237
238 dev->output_running = 0;
239 wait_event_timeout(dev->prepare_wait_queue, dev->output_running, HZ);
240 if (!dev->output_running) {
241 stream_stop(dev);
242 return -EPIPE;
243 }
244
245 return 0;
246 }
247
248 static int snd_usb_caiaq_pcm_trigger(struct snd_pcm_substream *sub, int cmd)
249 {
250 struct snd_usb_caiaqdev *dev = snd_pcm_substream_chip(sub);
251
252 switch (cmd) {
253 case SNDRV_PCM_TRIGGER_START:
254 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
255 activate_substream(dev, sub);
256 break;
257 case SNDRV_PCM_TRIGGER_STOP:
258 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
259 deactivate_substream(dev, sub);
260 break;
261 default:
262 return -EINVAL;
263 }
264
265 return 0;
266 }
267
268 static snd_pcm_uframes_t
269 snd_usb_caiaq_pcm_pointer(struct snd_pcm_substream *sub)
270 {
271 int index = sub->number;
272 struct snd_usb_caiaqdev *dev = snd_pcm_substream_chip(sub);
273
274 if (dev->input_panic || dev->output_panic)
275 return SNDRV_PCM_POS_XRUN;
276
277 if (sub->stream == SNDRV_PCM_STREAM_PLAYBACK)
278 return bytes_to_frames(sub->runtime,
279 dev->audio_out_buf_pos[index]);
280 else
281 return bytes_to_frames(sub->runtime,
282 dev->audio_in_buf_pos[index]);
283 }
284
285 /* operators for both playback and capture */
286 static struct snd_pcm_ops snd_usb_caiaq_ops = {
287 .open = snd_usb_caiaq_substream_open,
288 .close = snd_usb_caiaq_substream_close,
289 .ioctl = snd_pcm_lib_ioctl,
290 .hw_params = snd_usb_caiaq_pcm_hw_params,
291 .hw_free = snd_usb_caiaq_pcm_hw_free,
292 .prepare = snd_usb_caiaq_pcm_prepare,
293 .trigger = snd_usb_caiaq_pcm_trigger,
294 .pointer = snd_usb_caiaq_pcm_pointer
295 };
296
297 static void check_for_elapsed_periods(struct snd_usb_caiaqdev *dev,
298 struct snd_pcm_substream **subs)
299 {
300 int stream, pb, *cnt;
301 struct snd_pcm_substream *sub;
302
303 for (stream = 0; stream < dev->n_streams; stream++) {
304 sub = subs[stream];
305 if (!sub)
306 continue;
307
308 pb = frames_to_bytes(sub->runtime,
309 sub->runtime->period_size);
310 cnt = (sub->stream == SNDRV_PCM_STREAM_PLAYBACK) ?
311 &dev->period_out_count[stream] :
312 &dev->period_in_count[stream];
313
314 if (*cnt >= pb) {
315 snd_pcm_period_elapsed(sub);
316 *cnt %= pb;
317 }
318 }
319 }
320
321 static void read_in_urb_mode0(struct snd_usb_caiaqdev *dev,
322 const struct urb *urb,
323 const struct usb_iso_packet_descriptor *iso)
324 {
325 unsigned char *usb_buf = urb->transfer_buffer + iso->offset;
326 struct snd_pcm_substream *sub;
327 int stream, i;
328
329 if (all_substreams_zero(dev->sub_capture))
330 return;
331
332 for (i = 0; i < iso->actual_length;) {
333 for (stream = 0; stream < dev->n_streams; stream++, i++) {
334 sub = dev->sub_capture[stream];
335 if (sub) {
336 struct snd_pcm_runtime *rt = sub->runtime;
337 char *audio_buf = rt->dma_area;
338 int sz = frames_to_bytes(rt, rt->buffer_size);
339 audio_buf[dev->audio_in_buf_pos[stream]++]
340 = usb_buf[i];
341 dev->period_in_count[stream]++;
342 if (dev->audio_in_buf_pos[stream] == sz)
343 dev->audio_in_buf_pos[stream] = 0;
344 }
345 }
346 }
347 }
348
349 static void read_in_urb_mode2(struct snd_usb_caiaqdev *dev,
350 const struct urb *urb,
351 const struct usb_iso_packet_descriptor *iso)
352 {
353 unsigned char *usb_buf = urb->transfer_buffer + iso->offset;
354 unsigned char check_byte;
355 struct snd_pcm_substream *sub;
356 int stream, i;
357
358 for (i = 0; i < iso->actual_length;) {
359 if (i % (dev->n_streams * BYTES_PER_SAMPLE_USB) == 0) {
360 for (stream = 0;
361 stream < dev->n_streams;
362 stream++, i++) {
363 if (dev->first_packet)
364 continue;
365
366 check_byte = MAKE_CHECKBYTE(dev, stream, i);
367
368 if ((usb_buf[i] & 0x3f) != check_byte)
369 dev->input_panic = 1;
370
371 if (usb_buf[i] & 0x80)
372 dev->output_panic = 1;
373 }
374 }
375 dev->first_packet = 0;
376
377 for (stream = 0; stream < dev->n_streams; stream++, i++) {
378 sub = dev->sub_capture[stream];
379 if (sub) {
380 struct snd_pcm_runtime *rt = sub->runtime;
381 char *audio_buf = rt->dma_area;
382 int sz = frames_to_bytes(rt, rt->buffer_size);
383 audio_buf[dev->audio_in_buf_pos[stream]++] =
384 usb_buf[i];
385 dev->period_in_count[stream]++;
386 if (dev->audio_in_buf_pos[stream] == sz)
387 dev->audio_in_buf_pos[stream] = 0;
388 }
389 }
390 }
391 }
392
393 static void read_in_urb(struct snd_usb_caiaqdev *dev,
394 const struct urb *urb,
395 const struct usb_iso_packet_descriptor *iso)
396 {
397 if (!dev->streaming)
398 return;
399
400 switch (dev->spec.data_alignment) {
401 case 0:
402 read_in_urb_mode0(dev, urb, iso);
403 break;
404 case 2:
405 read_in_urb_mode2(dev, urb, iso);
406 break;
407 }
408
409 if (dev->input_panic || dev->output_panic) {
410 debug("streaming error detected %s %s\n",
411 dev->input_panic ? "(input)" : "",
412 dev->output_panic ? "(output)" : "");
413 }
414 }
415
416 static void fill_out_urb(struct snd_usb_caiaqdev *dev,
417 struct urb *urb,
418 const struct usb_iso_packet_descriptor *iso)
419 {
420 unsigned char *usb_buf = urb->transfer_buffer + iso->offset;
421 struct snd_pcm_substream *sub;
422 int stream, i;
423
424 for (i = 0; i < iso->length;) {
425 for (stream = 0; stream < dev->n_streams; stream++, i++) {
426 sub = dev->sub_playback[stream];
427 if (sub) {
428 struct snd_pcm_runtime *rt = sub->runtime;
429 char *audio_buf = rt->dma_area;
430 int sz = frames_to_bytes(rt, rt->buffer_size);
431 usb_buf[i] =
432 audio_buf[dev->audio_out_buf_pos[stream]];
433 dev->period_out_count[stream]++;
434 dev->audio_out_buf_pos[stream]++;
435 if (dev->audio_out_buf_pos[stream] == sz)
436 dev->audio_out_buf_pos[stream] = 0;
437 } else
438 usb_buf[i] = 0;
439 }
440
441 /* fill in the check bytes */
442 if (dev->spec.data_alignment == 2 &&
443 i % (dev->n_streams * BYTES_PER_SAMPLE_USB) ==
444 (dev->n_streams * CHANNELS_PER_STREAM))
445 for (stream = 0; stream < dev->n_streams; stream++, i++)
446 usb_buf[i] = MAKE_CHECKBYTE(dev, stream, i);
447 }
448 }
449
450 static void read_completed(struct urb *urb)
451 {
452 struct snd_usb_caiaq_cb_info *info = urb->context;
453 struct snd_usb_caiaqdev *dev;
454 struct urb *out;
455 int frame, len, send_it = 0, outframe = 0;
456
457 if (urb->status || !info)
458 return;
459
460 dev = info->dev;
461
462 if (!dev->streaming)
463 return;
464
465 out = dev->data_urbs_out[info->index];
466
467 /* read the recently received packet and send back one which has
468 * the same layout */
469 for (frame = 0; frame < FRAMES_PER_URB; frame++) {
470 if (urb->iso_frame_desc[frame].status)
471 continue;
472
473 len = urb->iso_frame_desc[outframe].actual_length;
474 out->iso_frame_desc[outframe].length = len;
475 out->iso_frame_desc[outframe].actual_length = 0;
476 out->iso_frame_desc[outframe].offset = BYTES_PER_FRAME * frame;
477
478 if (len > 0) {
479 spin_lock(&dev->spinlock);
480 fill_out_urb(dev, out, &out->iso_frame_desc[outframe]);
481 read_in_urb(dev, urb, &urb->iso_frame_desc[frame]);
482 spin_unlock(&dev->spinlock);
483 check_for_elapsed_periods(dev, dev->sub_playback);
484 check_for_elapsed_periods(dev, dev->sub_capture);
485 send_it = 1;
486 }
487
488 outframe++;
489 }
490
491 if (send_it) {
492 out->number_of_packets = FRAMES_PER_URB;
493 out->transfer_flags = URB_ISO_ASAP;
494 usb_submit_urb(out, GFP_ATOMIC);
495 }
496
497 /* re-submit inbound urb */
498 for (frame = 0; frame < FRAMES_PER_URB; frame++) {
499 urb->iso_frame_desc[frame].offset = BYTES_PER_FRAME * frame;
500 urb->iso_frame_desc[frame].length = BYTES_PER_FRAME;
501 urb->iso_frame_desc[frame].actual_length = 0;
502 }
503
504 urb->number_of_packets = FRAMES_PER_URB;
505 urb->transfer_flags = URB_ISO_ASAP;
506 usb_submit_urb(urb, GFP_ATOMIC);
507 }
508
509 static void write_completed(struct urb *urb)
510 {
511 struct snd_usb_caiaq_cb_info *info = urb->context;
512 struct snd_usb_caiaqdev *dev = info->dev;
513
514 if (!dev->output_running) {
515 dev->output_running = 1;
516 wake_up(&dev->prepare_wait_queue);
517 }
518 }
519
520 static struct urb **alloc_urbs(struct snd_usb_caiaqdev *dev, int dir, int *ret)
521 {
522 int i, frame;
523 struct urb **urbs;
524 struct usb_device *usb_dev = dev->chip.dev;
525 unsigned int pipe;
526
527 pipe = (dir == SNDRV_PCM_STREAM_PLAYBACK) ?
528 usb_sndisocpipe(usb_dev, ENDPOINT_PLAYBACK) :
529 usb_rcvisocpipe(usb_dev, ENDPOINT_CAPTURE);
530
531 urbs = kmalloc(N_URBS * sizeof(*urbs), GFP_KERNEL);
532 if (!urbs) {
533 log("unable to kmalloc() urbs, OOM!?\n");
534 *ret = -ENOMEM;
535 return NULL;
536 }
537
538 for (i = 0; i < N_URBS; i++) {
539 urbs[i] = usb_alloc_urb(FRAMES_PER_URB, GFP_KERNEL);
540 if (!urbs[i]) {
541 log("unable to usb_alloc_urb(), OOM!?\n");
542 *ret = -ENOMEM;
543 return urbs;
544 }
545
546 urbs[i]->transfer_buffer =
547 kmalloc(FRAMES_PER_URB * BYTES_PER_FRAME, GFP_KERNEL);
548 if (!urbs[i]->transfer_buffer) {
549 log("unable to kmalloc() transfer buffer, OOM!?\n");
550 *ret = -ENOMEM;
551 return urbs;
552 }
553
554 for (frame = 0; frame < FRAMES_PER_URB; frame++) {
555 struct usb_iso_packet_descriptor *iso =
556 &urbs[i]->iso_frame_desc[frame];
557
558 iso->offset = BYTES_PER_FRAME * frame;
559 iso->length = BYTES_PER_FRAME;
560 }
561
562 urbs[i]->dev = usb_dev;
563 urbs[i]->pipe = pipe;
564 urbs[i]->transfer_buffer_length = FRAMES_PER_URB
565 * BYTES_PER_FRAME;
566 urbs[i]->context = &dev->data_cb_info[i];
567 urbs[i]->interval = 1;
568 urbs[i]->transfer_flags = URB_ISO_ASAP;
569 urbs[i]->number_of_packets = FRAMES_PER_URB;
570 urbs[i]->complete = (dir == SNDRV_PCM_STREAM_CAPTURE) ?
571 read_completed : write_completed;
572 }
573
574 *ret = 0;
575 return urbs;
576 }
577
578 static void free_urbs(struct urb **urbs)
579 {
580 int i;
581
582 if (!urbs)
583 return;
584
585 for (i = 0; i < N_URBS; i++) {
586 if (!urbs[i])
587 continue;
588
589 usb_kill_urb(urbs[i]);
590 kfree(urbs[i]->transfer_buffer);
591 usb_free_urb(urbs[i]);
592 }
593
594 kfree(urbs);
595 }
596
597 int snd_usb_caiaq_audio_init(struct snd_usb_caiaqdev *dev)
598 {
599 int i, ret;
600
601 dev->n_audio_in = max(dev->spec.num_analog_audio_in,
602 dev->spec.num_digital_audio_in) /
603 CHANNELS_PER_STREAM;
604 dev->n_audio_out = max(dev->spec.num_analog_audio_out,
605 dev->spec.num_digital_audio_out) /
606 CHANNELS_PER_STREAM;
607 dev->n_streams = max(dev->n_audio_in, dev->n_audio_out);
608
609 debug("dev->n_audio_in = %d\n", dev->n_audio_in);
610 debug("dev->n_audio_out = %d\n", dev->n_audio_out);
611 debug("dev->n_streams = %d\n", dev->n_streams);
612
613 if (dev->n_streams > MAX_STREAMS) {
614 log("unable to initialize device, too many streams.\n");
615 return -EINVAL;
616 }
617
618 ret = snd_pcm_new(dev->chip.card, dev->product_name, 0,
619 dev->n_audio_out, dev->n_audio_in, &dev->pcm);
620
621 if (ret < 0) {
622 log("snd_pcm_new() returned %d\n", ret);
623 return ret;
624 }
625
626 dev->pcm->private_data = dev;
627 strcpy(dev->pcm->name, dev->product_name);
628
629 memset(dev->sub_playback, 0, sizeof(dev->sub_playback));
630 memset(dev->sub_capture, 0, sizeof(dev->sub_capture));
631
632 memcpy(&dev->pcm_info, &snd_usb_caiaq_pcm_hardware,
633 sizeof(snd_usb_caiaq_pcm_hardware));
634
635 /* setup samplerates */
636 dev->samplerates = dev->pcm_info.rates;
637 switch (dev->chip.usb_id) {
638 case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_AK1):
639 case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_RIGKONTROL3):
640 case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_SESSIONIO):
641 dev->samplerates |= SNDRV_PCM_RATE_88200;
642 dev->samplerates |= SNDRV_PCM_RATE_192000;
643 break;
644 case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_AUDIO8DJ):
645 dev->samplerates |= SNDRV_PCM_RATE_88200;
646 break;
647 }
648
649 snd_pcm_set_ops(dev->pcm, SNDRV_PCM_STREAM_PLAYBACK,
650 &snd_usb_caiaq_ops);
651 snd_pcm_set_ops(dev->pcm, SNDRV_PCM_STREAM_CAPTURE,
652 &snd_usb_caiaq_ops);
653
654 snd_pcm_lib_preallocate_pages_for_all(dev->pcm,
655 SNDRV_DMA_TYPE_CONTINUOUS,
656 snd_dma_continuous_data(GFP_KERNEL),
657 MAX_BUFFER_SIZE, MAX_BUFFER_SIZE);
658
659 dev->data_cb_info =
660 kmalloc(sizeof(struct snd_usb_caiaq_cb_info) * N_URBS,
661 GFP_KERNEL);
662
663 if (!dev->data_cb_info)
664 return -ENOMEM;
665
666 for (i = 0; i < N_URBS; i++) {
667 dev->data_cb_info[i].dev = dev;
668 dev->data_cb_info[i].index = i;
669 }
670
671 dev->data_urbs_in = alloc_urbs(dev, SNDRV_PCM_STREAM_CAPTURE, &ret);
672 if (ret < 0) {
673 kfree(dev->data_cb_info);
674 free_urbs(dev->data_urbs_in);
675 return ret;
676 }
677
678 dev->data_urbs_out = alloc_urbs(dev, SNDRV_PCM_STREAM_PLAYBACK, &ret);
679 if (ret < 0) {
680 kfree(dev->data_cb_info);
681 free_urbs(dev->data_urbs_in);
682 free_urbs(dev->data_urbs_out);
683 return ret;
684 }
685
686 return 0;
687 }
688
689 void snd_usb_caiaq_audio_free(struct snd_usb_caiaqdev *dev)
690 {
691 debug("%s(%p)\n", __func__, dev);
692 stream_stop(dev);
693 free_urbs(dev->data_urbs_in);
694 free_urbs(dev->data_urbs_out);
695 kfree(dev->data_cb_info);
696 }
697
Nao low-level kernelspace/userspace library that runs on our robots, Nao-Team HTWK