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Btrfs: don't flush delalloc arbitrarily
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / sound / usb / caiaq / audio.c
blobd0d493ca28ae2ec5693af9899d0199a0d4433a38
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/spinlock.h>
20 #include <linux/slab.h>
21 #include <linux/init.h>
22 #include <linux/usb.h>
23 #include <sound/core.h>
24 #include <sound/pcm.h>
25
26 #include "device.h"
27 #include "audio.h"
28
29 #define N_URBS 32
30 #define CLOCK_DRIFT_TOLERANCE 5
31 #define FRAMES_PER_URB 8
32 #define BYTES_PER_FRAME 512
33 #define CHANNELS_PER_STREAM 2
34 #define BYTES_PER_SAMPLE 3
35 #define BYTES_PER_SAMPLE_USB 4
36 #define MAX_BUFFER_SIZE (128*1024)
37 #define MAX_ENDPOINT_SIZE 512
38
39 #define ENDPOINT_CAPTURE 2
40 #define ENDPOINT_PLAYBACK 6
41
42 #define MAKE_CHECKBYTE(dev,stream,i) \
43 (stream << 1) | (~(i / (dev->n_streams * BYTES_PER_SAMPLE_USB)) & 1)
44
45 static struct snd_pcm_hardware snd_usb_caiaq_pcm_hardware = {
46 .info = (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
47 SNDRV_PCM_INFO_BLOCK_TRANSFER),
48 .formats = SNDRV_PCM_FMTBIT_S24_3BE,
49 .rates = (SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000 |
50 SNDRV_PCM_RATE_96000),
51 .rate_min = 44100,
52 .rate_max = 0, /* will overwrite later */
53 .channels_min = CHANNELS_PER_STREAM,
54 .channels_max = CHANNELS_PER_STREAM,
55 .buffer_bytes_max = MAX_BUFFER_SIZE,
56 .period_bytes_min = 128,
57 .period_bytes_max = MAX_BUFFER_SIZE,
58 .periods_min = 1,
59 .periods_max = 1024,
60 };
61
62 static void
63 activate_substream(struct snd_usb_caiaqdev *dev,
64 struct snd_pcm_substream *sub)
65 {
66 spin_lock(&dev->spinlock);
67
68 if (sub->stream == SNDRV_PCM_STREAM_PLAYBACK)
69 dev->sub_playback[sub->number] = sub;
70 else
71 dev->sub_capture[sub->number] = sub;
72
73 spin_unlock(&dev->spinlock);
74 }
75
76 static void
77 deactivate_substream(struct snd_usb_caiaqdev *dev,
78 struct snd_pcm_substream *sub)
79 {
80 unsigned long flags;
81 spin_lock_irqsave(&dev->spinlock, flags);
82
83 if (sub->stream == SNDRV_PCM_STREAM_PLAYBACK)
84 dev->sub_playback[sub->number] = NULL;
85 else
86 dev->sub_capture[sub->number] = NULL;
87
88 spin_unlock_irqrestore(&dev->spinlock, flags);
89 }
90
91 static int
92 all_substreams_zero(struct snd_pcm_substream **subs)
93 {
94 int i;
95 for (i = 0; i < MAX_STREAMS; i++)
96 if (subs[i] != NULL)
97 return 0;
98 return 1;
99 }
100
101 static int stream_start(struct snd_usb_caiaqdev *dev)
102 {
103 int i, ret;
104
105 debug("%s(%p)\n", __func__, dev);
106
107 if (dev->streaming)
108 return -EINVAL;
109
110 memset(dev->sub_playback, 0, sizeof(dev->sub_playback));
111 memset(dev->sub_capture, 0, sizeof(dev->sub_capture));
112 dev->input_panic = 0;
113 dev->output_panic = 0;
114 dev->first_packet = 4;
115 dev->streaming = 1;
116 dev->warned = 0;
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 int out_pos;
205
206 switch (dev->spec.data_alignment) {
207 case 0:
208 case 2:
209 out_pos = BYTES_PER_SAMPLE + 1;
210 break;
211 case 3:
212 default:
213 out_pos = 0;
214 break;
215 }
216
217 dev->period_out_count[index] = out_pos;
218 dev->audio_out_buf_pos[index] = out_pos;
219 } else {
220 int in_pos;
221
222 switch (dev->spec.data_alignment) {
223 case 0:
224 in_pos = BYTES_PER_SAMPLE + 2;
225 break;
226 case 2:
227 in_pos = BYTES_PER_SAMPLE;
228 break;
229 case 3:
230 default:
231 in_pos = 0;
232 break;
233 }
234
235 dev->period_in_count[index] = in_pos;
236 dev->audio_in_buf_pos[index] = in_pos;
237 }
238
239 if (dev->streaming)
240 return 0;
241
242 /* the first client that opens a stream defines the sample rate
243 * setting for all subsequent calls, until the last client closed. */
244 for (i=0; i < ARRAY_SIZE(rates); i++)
245 if (runtime->rate == rates[i])
246 dev->pcm_info.rates = 1 << i;
247
248 snd_pcm_limit_hw_rates(runtime);
249
250 bytes_per_sample = BYTES_PER_SAMPLE;
251 if (dev->spec.data_alignment >= 2)
252 bytes_per_sample++;
253
254 bpp = ((runtime->rate / 8000) + CLOCK_DRIFT_TOLERANCE)
255 * bytes_per_sample * CHANNELS_PER_STREAM * dev->n_streams;
256
257 if (bpp > MAX_ENDPOINT_SIZE)
258 bpp = MAX_ENDPOINT_SIZE;
259
260 ret = snd_usb_caiaq_set_audio_params(dev, runtime->rate,
261 runtime->sample_bits, bpp);
262 if (ret)
263 return ret;
264
265 ret = stream_start(dev);
266 if (ret)
267 return ret;
268
269 dev->output_running = 0;
270 wait_event_timeout(dev->prepare_wait_queue, dev->output_running, HZ);
271 if (!dev->output_running) {
272 stream_stop(dev);
273 return -EPIPE;
274 }
275
276 return 0;
277 }
278
279 static int snd_usb_caiaq_pcm_trigger(struct snd_pcm_substream *sub, int cmd)
280 {
281 struct snd_usb_caiaqdev *dev = snd_pcm_substream_chip(sub);
282
283 debug("%s(%p) cmd %d\n", __func__, sub, cmd);
284
285 switch (cmd) {
286 case SNDRV_PCM_TRIGGER_START:
287 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
288 activate_substream(dev, sub);
289 break;
290 case SNDRV_PCM_TRIGGER_STOP:
291 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
292 deactivate_substream(dev, sub);
293 break;
294 default:
295 return -EINVAL;
296 }
297
298 return 0;
299 }
300
301 static snd_pcm_uframes_t
302 snd_usb_caiaq_pcm_pointer(struct snd_pcm_substream *sub)
303 {
304 int index = sub->number;
305 struct snd_usb_caiaqdev *dev = snd_pcm_substream_chip(sub);
306 snd_pcm_uframes_t ptr;
307
308 spin_lock(&dev->spinlock);
309
310 if (dev->input_panic || dev->output_panic)
311 ptr = SNDRV_PCM_POS_XRUN;
312
313 if (sub->stream == SNDRV_PCM_STREAM_PLAYBACK)
314 ptr = bytes_to_frames(sub->runtime,
315 dev->audio_out_buf_pos[index]);
316 else
317 ptr = bytes_to_frames(sub->runtime,
318 dev->audio_in_buf_pos[index]);
319
320 spin_unlock(&dev->spinlock);
321 return ptr;
322 }
323
324 /* operators for both playback and capture */
325 static struct snd_pcm_ops snd_usb_caiaq_ops = {
326 .open = snd_usb_caiaq_substream_open,
327 .close = snd_usb_caiaq_substream_close,
328 .ioctl = snd_pcm_lib_ioctl,
329 .hw_params = snd_usb_caiaq_pcm_hw_params,
330 .hw_free = snd_usb_caiaq_pcm_hw_free,
331 .prepare = snd_usb_caiaq_pcm_prepare,
332 .trigger = snd_usb_caiaq_pcm_trigger,
333 .pointer = snd_usb_caiaq_pcm_pointer
334 };
335
336 static void check_for_elapsed_periods(struct snd_usb_caiaqdev *dev,
337 struct snd_pcm_substream **subs)
338 {
339 int stream, pb, *cnt;
340 struct snd_pcm_substream *sub;
341
342 for (stream = 0; stream < dev->n_streams; stream++) {
343 sub = subs[stream];
344 if (!sub)
345 continue;
346
347 pb = snd_pcm_lib_period_bytes(sub);
348 cnt = (sub->stream == SNDRV_PCM_STREAM_PLAYBACK) ?
349 &dev->period_out_count[stream] :
350 &dev->period_in_count[stream];
351
352 if (*cnt >= pb) {
353 snd_pcm_period_elapsed(sub);
354 *cnt %= pb;
355 }
356 }
357 }
358
359 static void read_in_urb_mode0(struct snd_usb_caiaqdev *dev,
360 const struct urb *urb,
361 const struct usb_iso_packet_descriptor *iso)
362 {
363 unsigned char *usb_buf = urb->transfer_buffer + iso->offset;
364 struct snd_pcm_substream *sub;
365 int stream, i;
366
367 if (all_substreams_zero(dev->sub_capture))
368 return;
369
370 for (i = 0; i < iso->actual_length;) {
371 for (stream = 0; stream < dev->n_streams; stream++, i++) {
372 sub = dev->sub_capture[stream];
373 if (sub) {
374 struct snd_pcm_runtime *rt = sub->runtime;
375 char *audio_buf = rt->dma_area;
376 int sz = frames_to_bytes(rt, rt->buffer_size);
377 audio_buf[dev->audio_in_buf_pos[stream]++]
378 = usb_buf[i];
379 dev->period_in_count[stream]++;
380 if (dev->audio_in_buf_pos[stream] == sz)
381 dev->audio_in_buf_pos[stream] = 0;
382 }
383 }
384 }
385 }
386
387 static void read_in_urb_mode2(struct snd_usb_caiaqdev *dev,
388 const struct urb *urb,
389 const struct usb_iso_packet_descriptor *iso)
390 {
391 unsigned char *usb_buf = urb->transfer_buffer + iso->offset;
392 unsigned char check_byte;
393 struct snd_pcm_substream *sub;
394 int stream, i;
395
396 for (i = 0; i < iso->actual_length;) {
397 if (i % (dev->n_streams * BYTES_PER_SAMPLE_USB) == 0) {
398 for (stream = 0;
399 stream < dev->n_streams;
400 stream++, i++) {
401 if (dev->first_packet)
402 continue;
403
404 check_byte = MAKE_CHECKBYTE(dev, stream, i);
405
406 if ((usb_buf[i] & 0x3f) != check_byte)
407 dev->input_panic = 1;
408
409 if (usb_buf[i] & 0x80)
410 dev->output_panic = 1;
411 }
412 }
413 dev->first_packet = 0;
414
415 for (stream = 0; stream < dev->n_streams; stream++, i++) {
416 sub = dev->sub_capture[stream];
417 if (dev->input_panic)
418 usb_buf[i] = 0;
419
420 if (sub) {
421 struct snd_pcm_runtime *rt = sub->runtime;
422 char *audio_buf = rt->dma_area;
423 int sz = frames_to_bytes(rt, rt->buffer_size);
424 audio_buf[dev->audio_in_buf_pos[stream]++] =
425 usb_buf[i];
426 dev->period_in_count[stream]++;
427 if (dev->audio_in_buf_pos[stream] == sz)
428 dev->audio_in_buf_pos[stream] = 0;
429 }
430 }
431 }
432 }
433
434 static void read_in_urb_mode3(struct snd_usb_caiaqdev *dev,
435 const struct urb *urb,
436 const struct usb_iso_packet_descriptor *iso)
437 {
438 unsigned char *usb_buf = urb->transfer_buffer + iso->offset;
439 int stream, i;
440
441 /* paranoia check */
442 if (iso->actual_length % (BYTES_PER_SAMPLE_USB * CHANNELS_PER_STREAM))
443 return;
444
445 for (i = 0; i < iso->actual_length;) {
446 for (stream = 0; stream < dev->n_streams; stream++) {
447 struct snd_pcm_substream *sub = dev->sub_capture[stream];
448 char *audio_buf = NULL;
449 int c, n, sz = 0;
450
451 if (sub && !dev->input_panic) {
452 struct snd_pcm_runtime *rt = sub->runtime;
453 audio_buf = rt->dma_area;
454 sz = frames_to_bytes(rt, rt->buffer_size);
455 }
456
457 for (c = 0; c < CHANNELS_PER_STREAM; c++) {
458 /* 3 audio data bytes, followed by 1 check byte */
459 if (audio_buf) {
460 for (n = 0; n < BYTES_PER_SAMPLE; n++) {
461 audio_buf[dev->audio_in_buf_pos[stream]++] = usb_buf[i+n];
462
463 if (dev->audio_in_buf_pos[stream] == sz)
464 dev->audio_in_buf_pos[stream] = 0;
465 }
466
467 dev->period_in_count[stream] += BYTES_PER_SAMPLE;
468 }
469
470 i += BYTES_PER_SAMPLE;
471
472 if (usb_buf[i] != ((stream << 1) | c) &&
473 !dev->first_packet) {
474 if (!dev->input_panic)
475 printk(" EXPECTED: %02x got %02x, c %d, stream %d, i %d\n",
476 ((stream << 1) | c), usb_buf[i], c, stream, i);
477 dev->input_panic = 1;
478 }
479
480 i++;
481 }
482 }
483 }
484
485 if (dev->first_packet > 0)
486 dev->first_packet--;
487 }
488
489 static void read_in_urb(struct snd_usb_caiaqdev *dev,
490 const struct urb *urb,
491 const struct usb_iso_packet_descriptor *iso)
492 {
493 if (!dev->streaming)
494 return;
495
496 if (iso->actual_length < dev->bpp)
497 return;
498
499 switch (dev->spec.data_alignment) {
500 case 0:
501 read_in_urb_mode0(dev, urb, iso);
502 break;
503 case 2:
504 read_in_urb_mode2(dev, urb, iso);
505 break;
506 case 3:
507 read_in_urb_mode3(dev, urb, iso);
508 break;
509 }
510
511 if ((dev->input_panic || dev->output_panic) && !dev->warned) {
512 debug("streaming error detected %s %s\n",
513 dev->input_panic ? "(input)" : "",
514 dev->output_panic ? "(output)" : "");
515 dev->warned = 1;
516 }
517 }
518
519 static void fill_out_urb_mode_0(struct snd_usb_caiaqdev *dev,
520 struct urb *urb,
521 const struct usb_iso_packet_descriptor *iso)
522 {
523 unsigned char *usb_buf = urb->transfer_buffer + iso->offset;
524 struct snd_pcm_substream *sub;
525 int stream, i;
526
527 for (i = 0; i < iso->length;) {
528 for (stream = 0; stream < dev->n_streams; stream++, i++) {
529 sub = dev->sub_playback[stream];
530 if (sub) {
531 struct snd_pcm_runtime *rt = sub->runtime;
532 char *audio_buf = rt->dma_area;
533 int sz = frames_to_bytes(rt, rt->buffer_size);
534 usb_buf[i] =
535 audio_buf[dev->audio_out_buf_pos[stream]];
536 dev->period_out_count[stream]++;
537 dev->audio_out_buf_pos[stream]++;
538 if (dev->audio_out_buf_pos[stream] == sz)
539 dev->audio_out_buf_pos[stream] = 0;
540 } else
541 usb_buf[i] = 0;
542 }
543
544 /* fill in the check bytes */
545 if (dev->spec.data_alignment == 2 &&
546 i % (dev->n_streams * BYTES_PER_SAMPLE_USB) ==
547 (dev->n_streams * CHANNELS_PER_STREAM))
548 for (stream = 0; stream < dev->n_streams; stream++, i++)
549 usb_buf[i] = MAKE_CHECKBYTE(dev, stream, i);
550 }
551 }
552
553 static void fill_out_urb_mode_3(struct snd_usb_caiaqdev *dev,
554 struct urb *urb,
555 const struct usb_iso_packet_descriptor *iso)
556 {
557 unsigned char *usb_buf = urb->transfer_buffer + iso->offset;
558 int stream, i;
559
560 for (i = 0; i < iso->length;) {
561 for (stream = 0; stream < dev->n_streams; stream++) {
562 struct snd_pcm_substream *sub = dev->sub_playback[stream];
563 char *audio_buf = NULL;
564 int c, n, sz = 0;
565
566 if (sub) {
567 struct snd_pcm_runtime *rt = sub->runtime;
568 audio_buf = rt->dma_area;
569 sz = frames_to_bytes(rt, rt->buffer_size);
570 }
571
572 for (c = 0; c < CHANNELS_PER_STREAM; c++) {
573 for (n = 0; n < BYTES_PER_SAMPLE; n++) {
574 if (audio_buf) {
575 usb_buf[i+n] = audio_buf[dev->audio_out_buf_pos[stream]++];
576
577 if (dev->audio_out_buf_pos[stream] == sz)
578 dev->audio_out_buf_pos[stream] = 0;
579 } else {
580 usb_buf[i+n] = 0;
581 }
582 }
583
584 if (audio_buf)
585 dev->period_out_count[stream] += BYTES_PER_SAMPLE;
586
587 i += BYTES_PER_SAMPLE;
588
589 /* fill in the check byte pattern */
590 usb_buf[i++] = (stream << 1) | c;
591 }
592 }
593 }
594 }
595
596 static inline void fill_out_urb(struct snd_usb_caiaqdev *dev,
597 struct urb *urb,
598 const struct usb_iso_packet_descriptor *iso)
599 {
600 switch (dev->spec.data_alignment) {
601 case 0:
602 case 2:
603 fill_out_urb_mode_0(dev, urb, iso);
604 break;
605 case 3:
606 fill_out_urb_mode_3(dev, urb, iso);
607 break;
608 }
609 }
610
611 static void read_completed(struct urb *urb)
612 {
613 struct snd_usb_caiaq_cb_info *info = urb->context;
614 struct snd_usb_caiaqdev *dev;
615 struct urb *out;
616 int frame, len, send_it = 0, outframe = 0;
617
618 if (urb->status || !info)
619 return;
620
621 dev = info->dev;
622
623 if (!dev->streaming)
624 return;
625
626 out = dev->data_urbs_out[info->index];
627
628 /* read the recently received packet and send back one which has
629 * the same layout */
630 for (frame = 0; frame < FRAMES_PER_URB; frame++) {
631 if (urb->iso_frame_desc[frame].status)
632 continue;
633
634 len = urb->iso_frame_desc[outframe].actual_length;
635 out->iso_frame_desc[outframe].length = len;
636 out->iso_frame_desc[outframe].actual_length = 0;
637 out->iso_frame_desc[outframe].offset = BYTES_PER_FRAME * frame;
638
639 if (len > 0) {
640 spin_lock(&dev->spinlock);
641 fill_out_urb(dev, out, &out->iso_frame_desc[outframe]);
642 read_in_urb(dev, urb, &urb->iso_frame_desc[frame]);
643 spin_unlock(&dev->spinlock);
644 check_for_elapsed_periods(dev, dev->sub_playback);
645 check_for_elapsed_periods(dev, dev->sub_capture);
646 send_it = 1;
647 }
648
649 outframe++;
650 }
651
652 if (send_it) {
653 out->number_of_packets = FRAMES_PER_URB;
654 out->transfer_flags = URB_ISO_ASAP;
655 usb_submit_urb(out, GFP_ATOMIC);
656 }
657
658 /* re-submit inbound urb */
659 for (frame = 0; frame < FRAMES_PER_URB; frame++) {
660 urb->iso_frame_desc[frame].offset = BYTES_PER_FRAME * frame;
661 urb->iso_frame_desc[frame].length = BYTES_PER_FRAME;
662 urb->iso_frame_desc[frame].actual_length = 0;
663 }
664
665 urb->number_of_packets = FRAMES_PER_URB;
666 urb->transfer_flags = URB_ISO_ASAP;
667 usb_submit_urb(urb, GFP_ATOMIC);
668 }
669
670 static void write_completed(struct urb *urb)
671 {
672 struct snd_usb_caiaq_cb_info *info = urb->context;
673 struct snd_usb_caiaqdev *dev = info->dev;
674
675 if (!dev->output_running) {
676 dev->output_running = 1;
677 wake_up(&dev->prepare_wait_queue);
678 }
679 }
680
681 static struct urb **alloc_urbs(struct snd_usb_caiaqdev *dev, int dir, int *ret)
682 {
683 int i, frame;
684 struct urb **urbs;
685 struct usb_device *usb_dev = dev->chip.dev;
686 unsigned int pipe;
687
688 pipe = (dir == SNDRV_PCM_STREAM_PLAYBACK) ?
689 usb_sndisocpipe(usb_dev, ENDPOINT_PLAYBACK) :
690 usb_rcvisocpipe(usb_dev, ENDPOINT_CAPTURE);
691
692 urbs = kmalloc(N_URBS * sizeof(*urbs), GFP_KERNEL);
693 if (!urbs) {
694 log("unable to kmalloc() urbs, OOM!?\n");
695 *ret = -ENOMEM;
696 return NULL;
697 }
698
699 for (i = 0; i < N_URBS; i++) {
700 urbs[i] = usb_alloc_urb(FRAMES_PER_URB, GFP_KERNEL);
701 if (!urbs[i]) {
702 log("unable to usb_alloc_urb(), OOM!?\n");
703 *ret = -ENOMEM;
704 return urbs;
705 }
706
707 urbs[i]->transfer_buffer =
708 kmalloc(FRAMES_PER_URB * BYTES_PER_FRAME, GFP_KERNEL);
709 if (!urbs[i]->transfer_buffer) {
710 log("unable to kmalloc() transfer buffer, OOM!?\n");
711 *ret = -ENOMEM;
712 return urbs;
713 }
714
715 for (frame = 0; frame < FRAMES_PER_URB; frame++) {
716 struct usb_iso_packet_descriptor *iso =
717 &urbs[i]->iso_frame_desc[frame];
718
719 iso->offset = BYTES_PER_FRAME * frame;
720 iso->length = BYTES_PER_FRAME;
721 }
722
723 urbs[i]->dev = usb_dev;
724 urbs[i]->pipe = pipe;
725 urbs[i]->transfer_buffer_length = FRAMES_PER_URB
726 * BYTES_PER_FRAME;
727 urbs[i]->context = &dev->data_cb_info[i];
728 urbs[i]->interval = 1;
729 urbs[i]->transfer_flags = URB_ISO_ASAP;
730 urbs[i]->number_of_packets = FRAMES_PER_URB;
731 urbs[i]->complete = (dir == SNDRV_PCM_STREAM_CAPTURE) ?
732 read_completed : write_completed;
733 }
734
735 *ret = 0;
736 return urbs;
737 }
738
739 static void free_urbs(struct urb **urbs)
740 {
741 int i;
742
743 if (!urbs)
744 return;
745
746 for (i = 0; i < N_URBS; i++) {
747 if (!urbs[i])
748 continue;
749
750 usb_kill_urb(urbs[i]);
751 kfree(urbs[i]->transfer_buffer);
752 usb_free_urb(urbs[i]);
753 }
754
755 kfree(urbs);
756 }
757
758 int snd_usb_caiaq_audio_init(struct snd_usb_caiaqdev *dev)
759 {
760 int i, ret;
761
762 dev->n_audio_in = max(dev->spec.num_analog_audio_in,
763 dev->spec.num_digital_audio_in) /
764 CHANNELS_PER_STREAM;
765 dev->n_audio_out = max(dev->spec.num_analog_audio_out,
766 dev->spec.num_digital_audio_out) /
767 CHANNELS_PER_STREAM;
768 dev->n_streams = max(dev->n_audio_in, dev->n_audio_out);
769
770 debug("dev->n_audio_in = %d\n", dev->n_audio_in);
771 debug("dev->n_audio_out = %d\n", dev->n_audio_out);
772 debug("dev->n_streams = %d\n", dev->n_streams);
773
774 if (dev->n_streams > MAX_STREAMS) {
775 log("unable to initialize device, too many streams.\n");
776 return -EINVAL;
777 }
778
779 ret = snd_pcm_new(dev->chip.card, dev->product_name, 0,
780 dev->n_audio_out, dev->n_audio_in, &dev->pcm);
781
782 if (ret < 0) {
783 log("snd_pcm_new() returned %d\n", ret);
784 return ret;
785 }
786
787 dev->pcm->private_data = dev;
788 strlcpy(dev->pcm->name, dev->product_name, sizeof(dev->pcm->name));
789
790 memset(dev->sub_playback, 0, sizeof(dev->sub_playback));
791 memset(dev->sub_capture, 0, sizeof(dev->sub_capture));
792
793 memcpy(&dev->pcm_info, &snd_usb_caiaq_pcm_hardware,
794 sizeof(snd_usb_caiaq_pcm_hardware));
795
796 /* setup samplerates */
797 dev->samplerates = dev->pcm_info.rates;
798 switch (dev->chip.usb_id) {
799 case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_AK1):
800 case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_RIGKONTROL3):
801 case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_SESSIONIO):
802 case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_GUITARRIGMOBILE):
803 dev->samplerates |= SNDRV_PCM_RATE_192000;
804 /* fall thru */
805 case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_AUDIO2DJ):
806 case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_AUDIO4DJ):
807 case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_AUDIO8DJ):
808 case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_TRAKTORAUDIO2):
809 dev->samplerates |= SNDRV_PCM_RATE_88200;
810 break;
811 }
812
813 snd_pcm_set_ops(dev->pcm, SNDRV_PCM_STREAM_PLAYBACK,
814 &snd_usb_caiaq_ops);
815 snd_pcm_set_ops(dev->pcm, SNDRV_PCM_STREAM_CAPTURE,
816 &snd_usb_caiaq_ops);
817
818 snd_pcm_lib_preallocate_pages_for_all(dev->pcm,
819 SNDRV_DMA_TYPE_CONTINUOUS,
820 snd_dma_continuous_data(GFP_KERNEL),
821 MAX_BUFFER_SIZE, MAX_BUFFER_SIZE);
822
823 dev->data_cb_info =
824 kmalloc(sizeof(struct snd_usb_caiaq_cb_info) * N_URBS,
825 GFP_KERNEL);
826
827 if (!dev->data_cb_info)
828 return -ENOMEM;
829
830 for (i = 0; i < N_URBS; i++) {
831 dev->data_cb_info[i].dev = dev;
832 dev->data_cb_info[i].index = i;
833 }
834
835 dev->data_urbs_in = alloc_urbs(dev, SNDRV_PCM_STREAM_CAPTURE, &ret);
836 if (ret < 0) {
837 kfree(dev->data_cb_info);
838 free_urbs(dev->data_urbs_in);
839 return ret;
840 }
841
842 dev->data_urbs_out = alloc_urbs(dev, SNDRV_PCM_STREAM_PLAYBACK, &ret);
843 if (ret < 0) {
844 kfree(dev->data_cb_info);
845 free_urbs(dev->data_urbs_in);
846 free_urbs(dev->data_urbs_out);
847 return ret;
848 }
849
850 return 0;
851 }
852
853 void snd_usb_caiaq_audio_free(struct snd_usb_caiaqdev *dev)
854 {
855 debug("%s(%p)\n", __func__, dev);
856 stream_stop(dev);
857 free_urbs(dev->data_urbs_in);
858 free_urbs(dev->data_urbs_out);
859 kfree(dev->data_cb_info);
860 }
861
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree