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Avoid beyond bounds copy while caching ACL
[zen-stable.git] / sound / usb / caiaq / audio.c
blobfde9a7a29cb6e670ba2d58e49b8b9e39a5cd7f15
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
143 if (test_bit(i, &dev->outurb_active_mask))
144 usb_kill_urb(dev->data_urbs_out[i]);
145 }
146
147 dev->outurb_active_mask = 0;
148 }
149
150 static int snd_usb_caiaq_substream_open(struct snd_pcm_substream *substream)
151 {
152 struct snd_usb_caiaqdev *dev = snd_pcm_substream_chip(substream);
153 debug("%s(%p)\n", __func__, substream);
154 substream->runtime->hw = dev->pcm_info;
155 snd_pcm_limit_hw_rates(substream->runtime);
156 return 0;
157 }
158
159 static int snd_usb_caiaq_substream_close(struct snd_pcm_substream *substream)
160 {
161 struct snd_usb_caiaqdev *dev = snd_pcm_substream_chip(substream);
162
163 debug("%s(%p)\n", __func__, substream);
164 if (all_substreams_zero(dev->sub_playback) &&
165 all_substreams_zero(dev->sub_capture)) {
166 /* when the last client has stopped streaming,
167 * all sample rates are allowed again */
168 stream_stop(dev);
169 dev->pcm_info.rates = dev->samplerates;
170 }
171
172 return 0;
173 }
174
175 static int snd_usb_caiaq_pcm_hw_params(struct snd_pcm_substream *sub,
176 struct snd_pcm_hw_params *hw_params)
177 {
178 debug("%s(%p)\n", __func__, sub);
179 return snd_pcm_lib_malloc_pages(sub, params_buffer_bytes(hw_params));
180 }
181
182 static int snd_usb_caiaq_pcm_hw_free(struct snd_pcm_substream *sub)
183 {
184 struct snd_usb_caiaqdev *dev = snd_pcm_substream_chip(sub);
185 debug("%s(%p)\n", __func__, sub);
186 deactivate_substream(dev, sub);
187 return snd_pcm_lib_free_pages(sub);
188 }
189
190 /* this should probably go upstream */
191 #if SNDRV_PCM_RATE_5512 != 1 << 0 || SNDRV_PCM_RATE_192000 != 1 << 12
192 #error "Change this table"
193 #endif
194
195 static unsigned int rates[] = { 5512, 8000, 11025, 16000, 22050, 32000, 44100,
196 48000, 64000, 88200, 96000, 176400, 192000 };
197
198 static int snd_usb_caiaq_pcm_prepare(struct snd_pcm_substream *substream)
199 {
200 int bytes_per_sample, bpp, ret, i;
201 int index = substream->number;
202 struct snd_usb_caiaqdev *dev = snd_pcm_substream_chip(substream);
203 struct snd_pcm_runtime *runtime = substream->runtime;
204
205 debug("%s(%p)\n", __func__, substream);
206
207 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
208 int out_pos;
209
210 switch (dev->spec.data_alignment) {
211 case 0:
212 case 2:
213 out_pos = BYTES_PER_SAMPLE + 1;
214 break;
215 case 3:
216 default:
217 out_pos = 0;
218 break;
219 }
220
221 dev->period_out_count[index] = out_pos;
222 dev->audio_out_buf_pos[index] = out_pos;
223 } else {
224 int in_pos;
225
226 switch (dev->spec.data_alignment) {
227 case 0:
228 in_pos = BYTES_PER_SAMPLE + 2;
229 break;
230 case 2:
231 in_pos = BYTES_PER_SAMPLE;
232 break;
233 case 3:
234 default:
235 in_pos = 0;
236 break;
237 }
238
239 dev->period_in_count[index] = in_pos;
240 dev->audio_in_buf_pos[index] = in_pos;
241 }
242
243 if (dev->streaming)
244 return 0;
245
246 /* the first client that opens a stream defines the sample rate
247 * setting for all subsequent calls, until the last client closed. */
248 for (i=0; i < ARRAY_SIZE(rates); i++)
249 if (runtime->rate == rates[i])
250 dev->pcm_info.rates = 1 << i;
251
252 snd_pcm_limit_hw_rates(runtime);
253
254 bytes_per_sample = BYTES_PER_SAMPLE;
255 if (dev->spec.data_alignment >= 2)
256 bytes_per_sample++;
257
258 bpp = ((runtime->rate / 8000) + CLOCK_DRIFT_TOLERANCE)
259 * bytes_per_sample * CHANNELS_PER_STREAM * dev->n_streams;
260
261 if (bpp > MAX_ENDPOINT_SIZE)
262 bpp = MAX_ENDPOINT_SIZE;
263
264 ret = snd_usb_caiaq_set_audio_params(dev, runtime->rate,
265 runtime->sample_bits, bpp);
266 if (ret)
267 return ret;
268
269 ret = stream_start(dev);
270 if (ret)
271 return ret;
272
273 dev->output_running = 0;
274 wait_event_timeout(dev->prepare_wait_queue, dev->output_running, HZ);
275 if (!dev->output_running) {
276 stream_stop(dev);
277 return -EPIPE;
278 }
279
280 return 0;
281 }
282
283 static int snd_usb_caiaq_pcm_trigger(struct snd_pcm_substream *sub, int cmd)
284 {
285 struct snd_usb_caiaqdev *dev = snd_pcm_substream_chip(sub);
286
287 debug("%s(%p) cmd %d\n", __func__, sub, cmd);
288
289 switch (cmd) {
290 case SNDRV_PCM_TRIGGER_START:
291 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
292 activate_substream(dev, sub);
293 break;
294 case SNDRV_PCM_TRIGGER_STOP:
295 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
296 deactivate_substream(dev, sub);
297 break;
298 default:
299 return -EINVAL;
300 }
301
302 return 0;
303 }
304
305 static snd_pcm_uframes_t
306 snd_usb_caiaq_pcm_pointer(struct snd_pcm_substream *sub)
307 {
308 int index = sub->number;
309 struct snd_usb_caiaqdev *dev = snd_pcm_substream_chip(sub);
310 snd_pcm_uframes_t ptr;
311
312 spin_lock(&dev->spinlock);
313
314 if (dev->input_panic || dev->output_panic) {
315 ptr = SNDRV_PCM_POS_XRUN;
316 goto unlock;
317 }
318
319 if (sub->stream == SNDRV_PCM_STREAM_PLAYBACK)
320 ptr = bytes_to_frames(sub->runtime,
321 dev->audio_out_buf_pos[index]);
322 else
323 ptr = bytes_to_frames(sub->runtime,
324 dev->audio_in_buf_pos[index]);
325
326 unlock:
327 spin_unlock(&dev->spinlock);
328 return ptr;
329 }
330
331 /* operators for both playback and capture */
332 static struct snd_pcm_ops snd_usb_caiaq_ops = {
333 .open = snd_usb_caiaq_substream_open,
334 .close = snd_usb_caiaq_substream_close,
335 .ioctl = snd_pcm_lib_ioctl,
336 .hw_params = snd_usb_caiaq_pcm_hw_params,
337 .hw_free = snd_usb_caiaq_pcm_hw_free,
338 .prepare = snd_usb_caiaq_pcm_prepare,
339 .trigger = snd_usb_caiaq_pcm_trigger,
340 .pointer = snd_usb_caiaq_pcm_pointer
341 };
342
343 static void check_for_elapsed_periods(struct snd_usb_caiaqdev *dev,
344 struct snd_pcm_substream **subs)
345 {
346 int stream, pb, *cnt;
347 struct snd_pcm_substream *sub;
348
349 for (stream = 0; stream < dev->n_streams; stream++) {
350 sub = subs[stream];
351 if (!sub)
352 continue;
353
354 pb = snd_pcm_lib_period_bytes(sub);
355 cnt = (sub->stream == SNDRV_PCM_STREAM_PLAYBACK) ?
356 &dev->period_out_count[stream] :
357 &dev->period_in_count[stream];
358
359 if (*cnt >= pb) {
360 snd_pcm_period_elapsed(sub);
361 *cnt %= pb;
362 }
363 }
364 }
365
366 static void read_in_urb_mode0(struct snd_usb_caiaqdev *dev,
367 const struct urb *urb,
368 const struct usb_iso_packet_descriptor *iso)
369 {
370 unsigned char *usb_buf = urb->transfer_buffer + iso->offset;
371 struct snd_pcm_substream *sub;
372 int stream, i;
373
374 if (all_substreams_zero(dev->sub_capture))
375 return;
376
377 for (i = 0; i < iso->actual_length;) {
378 for (stream = 0; stream < dev->n_streams; stream++, i++) {
379 sub = dev->sub_capture[stream];
380 if (sub) {
381 struct snd_pcm_runtime *rt = sub->runtime;
382 char *audio_buf = rt->dma_area;
383 int sz = frames_to_bytes(rt, rt->buffer_size);
384 audio_buf[dev->audio_in_buf_pos[stream]++]
385 = usb_buf[i];
386 dev->period_in_count[stream]++;
387 if (dev->audio_in_buf_pos[stream] == sz)
388 dev->audio_in_buf_pos[stream] = 0;
389 }
390 }
391 }
392 }
393
394 static void read_in_urb_mode2(struct snd_usb_caiaqdev *dev,
395 const struct urb *urb,
396 const struct usb_iso_packet_descriptor *iso)
397 {
398 unsigned char *usb_buf = urb->transfer_buffer + iso->offset;
399 unsigned char check_byte;
400 struct snd_pcm_substream *sub;
401 int stream, i;
402
403 for (i = 0; i < iso->actual_length;) {
404 if (i % (dev->n_streams * BYTES_PER_SAMPLE_USB) == 0) {
405 for (stream = 0;
406 stream < dev->n_streams;
407 stream++, i++) {
408 if (dev->first_packet)
409 continue;
410
411 check_byte = MAKE_CHECKBYTE(dev, stream, i);
412
413 if ((usb_buf[i] & 0x3f) != check_byte)
414 dev->input_panic = 1;
415
416 if (usb_buf[i] & 0x80)
417 dev->output_panic = 1;
418 }
419 }
420 dev->first_packet = 0;
421
422 for (stream = 0; stream < dev->n_streams; stream++, i++) {
423 sub = dev->sub_capture[stream];
424 if (dev->input_panic)
425 usb_buf[i] = 0;
426
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 audio_buf[dev->audio_in_buf_pos[stream]++] =
432 usb_buf[i];
433 dev->period_in_count[stream]++;
434 if (dev->audio_in_buf_pos[stream] == sz)
435 dev->audio_in_buf_pos[stream] = 0;
436 }
437 }
438 }
439 }
440
441 static void read_in_urb_mode3(struct snd_usb_caiaqdev *dev,
442 const struct urb *urb,
443 const struct usb_iso_packet_descriptor *iso)
444 {
445 unsigned char *usb_buf = urb->transfer_buffer + iso->offset;
446 int stream, i;
447
448 /* paranoia check */
449 if (iso->actual_length % (BYTES_PER_SAMPLE_USB * CHANNELS_PER_STREAM))
450 return;
451
452 for (i = 0; i < iso->actual_length;) {
453 for (stream = 0; stream < dev->n_streams; stream++) {
454 struct snd_pcm_substream *sub = dev->sub_capture[stream];
455 char *audio_buf = NULL;
456 int c, n, sz = 0;
457
458 if (sub && !dev->input_panic) {
459 struct snd_pcm_runtime *rt = sub->runtime;
460 audio_buf = rt->dma_area;
461 sz = frames_to_bytes(rt, rt->buffer_size);
462 }
463
464 for (c = 0; c < CHANNELS_PER_STREAM; c++) {
465 /* 3 audio data bytes, followed by 1 check byte */
466 if (audio_buf) {
467 for (n = 0; n < BYTES_PER_SAMPLE; n++) {
468 audio_buf[dev->audio_in_buf_pos[stream]++] = usb_buf[i+n];
469
470 if (dev->audio_in_buf_pos[stream] == sz)
471 dev->audio_in_buf_pos[stream] = 0;
472 }
473
474 dev->period_in_count[stream] += BYTES_PER_SAMPLE;
475 }
476
477 i += BYTES_PER_SAMPLE;
478
479 if (usb_buf[i] != ((stream << 1) | c) &&
480 !dev->first_packet) {
481 if (!dev->input_panic)
482 printk(" EXPECTED: %02x got %02x, c %d, stream %d, i %d\n",
483 ((stream << 1) | c), usb_buf[i], c, stream, i);
484 dev->input_panic = 1;
485 }
486
487 i++;
488 }
489 }
490 }
491
492 if (dev->first_packet > 0)
493 dev->first_packet--;
494 }
495
496 static void read_in_urb(struct snd_usb_caiaqdev *dev,
497 const struct urb *urb,
498 const struct usb_iso_packet_descriptor *iso)
499 {
500 if (!dev->streaming)
501 return;
502
503 if (iso->actual_length < dev->bpp)
504 return;
505
506 switch (dev->spec.data_alignment) {
507 case 0:
508 read_in_urb_mode0(dev, urb, iso);
509 break;
510 case 2:
511 read_in_urb_mode2(dev, urb, iso);
512 break;
513 case 3:
514 read_in_urb_mode3(dev, urb, iso);
515 break;
516 }
517
518 if ((dev->input_panic || dev->output_panic) && !dev->warned) {
519 debug("streaming error detected %s %s\n",
520 dev->input_panic ? "(input)" : "",
521 dev->output_panic ? "(output)" : "");
522 dev->warned = 1;
523 }
524 }
525
526 static void fill_out_urb_mode_0(struct snd_usb_caiaqdev *dev,
527 struct urb *urb,
528 const struct usb_iso_packet_descriptor *iso)
529 {
530 unsigned char *usb_buf = urb->transfer_buffer + iso->offset;
531 struct snd_pcm_substream *sub;
532 int stream, i;
533
534 for (i = 0; i < iso->length;) {
535 for (stream = 0; stream < dev->n_streams; stream++, i++) {
536 sub = dev->sub_playback[stream];
537 if (sub) {
538 struct snd_pcm_runtime *rt = sub->runtime;
539 char *audio_buf = rt->dma_area;
540 int sz = frames_to_bytes(rt, rt->buffer_size);
541 usb_buf[i] =
542 audio_buf[dev->audio_out_buf_pos[stream]];
543 dev->period_out_count[stream]++;
544 dev->audio_out_buf_pos[stream]++;
545 if (dev->audio_out_buf_pos[stream] == sz)
546 dev->audio_out_buf_pos[stream] = 0;
547 } else
548 usb_buf[i] = 0;
549 }
550
551 /* fill in the check bytes */
552 if (dev->spec.data_alignment == 2 &&
553 i % (dev->n_streams * BYTES_PER_SAMPLE_USB) ==
554 (dev->n_streams * CHANNELS_PER_STREAM))
555 for (stream = 0; stream < dev->n_streams; stream++, i++)
556 usb_buf[i] = MAKE_CHECKBYTE(dev, stream, i);
557 }
558 }
559
560 static void fill_out_urb_mode_3(struct snd_usb_caiaqdev *dev,
561 struct urb *urb,
562 const struct usb_iso_packet_descriptor *iso)
563 {
564 unsigned char *usb_buf = urb->transfer_buffer + iso->offset;
565 int stream, i;
566
567 for (i = 0; i < iso->length;) {
568 for (stream = 0; stream < dev->n_streams; stream++) {
569 struct snd_pcm_substream *sub = dev->sub_playback[stream];
570 char *audio_buf = NULL;
571 int c, n, sz = 0;
572
573 if (sub) {
574 struct snd_pcm_runtime *rt = sub->runtime;
575 audio_buf = rt->dma_area;
576 sz = frames_to_bytes(rt, rt->buffer_size);
577 }
578
579 for (c = 0; c < CHANNELS_PER_STREAM; c++) {
580 for (n = 0; n < BYTES_PER_SAMPLE; n++) {
581 if (audio_buf) {
582 usb_buf[i+n] = audio_buf[dev->audio_out_buf_pos[stream]++];
583
584 if (dev->audio_out_buf_pos[stream] == sz)
585 dev->audio_out_buf_pos[stream] = 0;
586 } else {
587 usb_buf[i+n] = 0;
588 }
589 }
590
591 if (audio_buf)
592 dev->period_out_count[stream] += BYTES_PER_SAMPLE;
593
594 i += BYTES_PER_SAMPLE;
595
596 /* fill in the check byte pattern */
597 usb_buf[i++] = (stream << 1) | c;
598 }
599 }
600 }
601 }
602
603 static inline void fill_out_urb(struct snd_usb_caiaqdev *dev,
604 struct urb *urb,
605 const struct usb_iso_packet_descriptor *iso)
606 {
607 switch (dev->spec.data_alignment) {
608 case 0:
609 case 2:
610 fill_out_urb_mode_0(dev, urb, iso);
611 break;
612 case 3:
613 fill_out_urb_mode_3(dev, urb, iso);
614 break;
615 }
616 }
617
618 static void read_completed(struct urb *urb)
619 {
620 struct snd_usb_caiaq_cb_info *info = urb->context;
621 struct snd_usb_caiaqdev *dev;
622 struct urb *out = NULL;
623 int i, frame, len, send_it = 0, outframe = 0;
624 size_t offset = 0;
625
626 if (urb->status || !info)
627 return;
628
629 dev = info->dev;
630
631 if (!dev->streaming)
632 return;
633
634 /* find an unused output urb that is unused */
635 for (i = 0; i < N_URBS; i++)
636 if (test_and_set_bit(i, &dev->outurb_active_mask) == 0) {
637 out = dev->data_urbs_out[i];
638 break;
639 }
640
641 if (!out) {
642 log("Unable to find an output urb to use\n");
643 goto requeue;
644 }
645
646 /* read the recently received packet and send back one which has
647 * the same layout */
648 for (frame = 0; frame < FRAMES_PER_URB; frame++) {
649 if (urb->iso_frame_desc[frame].status)
650 continue;
651
652 len = urb->iso_frame_desc[outframe].actual_length;
653 out->iso_frame_desc[outframe].length = len;
654 out->iso_frame_desc[outframe].actual_length = 0;
655 out->iso_frame_desc[outframe].offset = offset;
656 offset += len;
657
658 if (len > 0) {
659 spin_lock(&dev->spinlock);
660 fill_out_urb(dev, out, &out->iso_frame_desc[outframe]);
661 read_in_urb(dev, urb, &urb->iso_frame_desc[frame]);
662 spin_unlock(&dev->spinlock);
663 check_for_elapsed_periods(dev, dev->sub_playback);
664 check_for_elapsed_periods(dev, dev->sub_capture);
665 send_it = 1;
666 }
667
668 outframe++;
669 }
670
671 if (send_it) {
672 out->number_of_packets = outframe;
673 out->transfer_flags = URB_ISO_ASAP;
674 usb_submit_urb(out, GFP_ATOMIC);
675 } else {
676 struct snd_usb_caiaq_cb_info *oinfo = out->context;
677 clear_bit(oinfo->index, &dev->outurb_active_mask);
678 }
679
680 requeue:
681 /* re-submit inbound urb */
682 for (frame = 0; frame < FRAMES_PER_URB; frame++) {
683 urb->iso_frame_desc[frame].offset = BYTES_PER_FRAME * frame;
684 urb->iso_frame_desc[frame].length = BYTES_PER_FRAME;
685 urb->iso_frame_desc[frame].actual_length = 0;
686 }
687
688 urb->number_of_packets = FRAMES_PER_URB;
689 urb->transfer_flags = URB_ISO_ASAP;
690 usb_submit_urb(urb, GFP_ATOMIC);
691 }
692
693 static void write_completed(struct urb *urb)
694 {
695 struct snd_usb_caiaq_cb_info *info = urb->context;
696 struct snd_usb_caiaqdev *dev = info->dev;
697
698 if (!dev->output_running) {
699 dev->output_running = 1;
700 wake_up(&dev->prepare_wait_queue);
701 }
702
703 clear_bit(info->index, &dev->outurb_active_mask);
704 }
705
706 static struct urb **alloc_urbs(struct snd_usb_caiaqdev *dev, int dir, int *ret)
707 {
708 int i, frame;
709 struct urb **urbs;
710 struct usb_device *usb_dev = dev->chip.dev;
711 unsigned int pipe;
712
713 pipe = (dir == SNDRV_PCM_STREAM_PLAYBACK) ?
714 usb_sndisocpipe(usb_dev, ENDPOINT_PLAYBACK) :
715 usb_rcvisocpipe(usb_dev, ENDPOINT_CAPTURE);
716
717 urbs = kmalloc(N_URBS * sizeof(*urbs), GFP_KERNEL);
718 if (!urbs) {
719 log("unable to kmalloc() urbs, OOM!?\n");
720 *ret = -ENOMEM;
721 return NULL;
722 }
723
724 for (i = 0; i < N_URBS; i++) {
725 urbs[i] = usb_alloc_urb(FRAMES_PER_URB, GFP_KERNEL);
726 if (!urbs[i]) {
727 log("unable to usb_alloc_urb(), OOM!?\n");
728 *ret = -ENOMEM;
729 return urbs;
730 }
731
732 urbs[i]->transfer_buffer =
733 kmalloc(FRAMES_PER_URB * BYTES_PER_FRAME, GFP_KERNEL);
734 if (!urbs[i]->transfer_buffer) {
735 log("unable to kmalloc() transfer buffer, OOM!?\n");
736 *ret = -ENOMEM;
737 return urbs;
738 }
739
740 for (frame = 0; frame < FRAMES_PER_URB; frame++) {
741 struct usb_iso_packet_descriptor *iso =
742 &urbs[i]->iso_frame_desc[frame];
743
744 iso->offset = BYTES_PER_FRAME * frame;
745 iso->length = BYTES_PER_FRAME;
746 }
747
748 urbs[i]->dev = usb_dev;
749 urbs[i]->pipe = pipe;
750 urbs[i]->transfer_buffer_length = FRAMES_PER_URB
751 * BYTES_PER_FRAME;
752 urbs[i]->context = &dev->data_cb_info[i];
753 urbs[i]->interval = 1;
754 urbs[i]->transfer_flags = URB_ISO_ASAP;
755 urbs[i]->number_of_packets = FRAMES_PER_URB;
756 urbs[i]->complete = (dir == SNDRV_PCM_STREAM_CAPTURE) ?
757 read_completed : write_completed;
758 }
759
760 *ret = 0;
761 return urbs;
762 }
763
764 static void free_urbs(struct urb **urbs)
765 {
766 int i;
767
768 if (!urbs)
769 return;
770
771 for (i = 0; i < N_URBS; i++) {
772 if (!urbs[i])
773 continue;
774
775 usb_kill_urb(urbs[i]);
776 kfree(urbs[i]->transfer_buffer);
777 usb_free_urb(urbs[i]);
778 }
779
780 kfree(urbs);
781 }
782
783 int snd_usb_caiaq_audio_init(struct snd_usb_caiaqdev *dev)
784 {
785 int i, ret;
786
787 dev->n_audio_in = max(dev->spec.num_analog_audio_in,
788 dev->spec.num_digital_audio_in) /
789 CHANNELS_PER_STREAM;
790 dev->n_audio_out = max(dev->spec.num_analog_audio_out,
791 dev->spec.num_digital_audio_out) /
792 CHANNELS_PER_STREAM;
793 dev->n_streams = max(dev->n_audio_in, dev->n_audio_out);
794
795 debug("dev->n_audio_in = %d\n", dev->n_audio_in);
796 debug("dev->n_audio_out = %d\n", dev->n_audio_out);
797 debug("dev->n_streams = %d\n", dev->n_streams);
798
799 if (dev->n_streams > MAX_STREAMS) {
800 log("unable to initialize device, too many streams.\n");
801 return -EINVAL;
802 }
803
804 ret = snd_pcm_new(dev->chip.card, dev->product_name, 0,
805 dev->n_audio_out, dev->n_audio_in, &dev->pcm);
806
807 if (ret < 0) {
808 log("snd_pcm_new() returned %d\n", ret);
809 return ret;
810 }
811
812 dev->pcm->private_data = dev;
813 strlcpy(dev->pcm->name, dev->product_name, sizeof(dev->pcm->name));
814
815 memset(dev->sub_playback, 0, sizeof(dev->sub_playback));
816 memset(dev->sub_capture, 0, sizeof(dev->sub_capture));
817
818 memcpy(&dev->pcm_info, &snd_usb_caiaq_pcm_hardware,
819 sizeof(snd_usb_caiaq_pcm_hardware));
820
821 /* setup samplerates */
822 dev->samplerates = dev->pcm_info.rates;
823 switch (dev->chip.usb_id) {
824 case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_AK1):
825 case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_RIGKONTROL3):
826 case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_SESSIONIO):
827 case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_GUITARRIGMOBILE):
828 dev->samplerates |= SNDRV_PCM_RATE_192000;
829 /* fall thru */
830 case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_AUDIO2DJ):
831 case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_AUDIO4DJ):
832 case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_AUDIO8DJ):
833 case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_TRAKTORAUDIO2):
834 dev->samplerates |= SNDRV_PCM_RATE_88200;
835 break;
836 }
837
838 snd_pcm_set_ops(dev->pcm, SNDRV_PCM_STREAM_PLAYBACK,
839 &snd_usb_caiaq_ops);
840 snd_pcm_set_ops(dev->pcm, SNDRV_PCM_STREAM_CAPTURE,
841 &snd_usb_caiaq_ops);
842
843 snd_pcm_lib_preallocate_pages_for_all(dev->pcm,
844 SNDRV_DMA_TYPE_CONTINUOUS,
845 snd_dma_continuous_data(GFP_KERNEL),
846 MAX_BUFFER_SIZE, MAX_BUFFER_SIZE);
847
848 dev->data_cb_info =
849 kmalloc(sizeof(struct snd_usb_caiaq_cb_info) * N_URBS,
850 GFP_KERNEL);
851
852 if (!dev->data_cb_info)
853 return -ENOMEM;
854
855 dev->outurb_active_mask = 0;
856 BUILD_BUG_ON(N_URBS > (sizeof(dev->outurb_active_mask) * 8));
857
858 for (i = 0; i < N_URBS; i++) {
859 dev->data_cb_info[i].dev = dev;
860 dev->data_cb_info[i].index = i;
861 }
862
863 dev->data_urbs_in = alloc_urbs(dev, SNDRV_PCM_STREAM_CAPTURE, &ret);
864 if (ret < 0) {
865 kfree(dev->data_cb_info);
866 free_urbs(dev->data_urbs_in);
867 return ret;
868 }
869
870 dev->data_urbs_out = alloc_urbs(dev, SNDRV_PCM_STREAM_PLAYBACK, &ret);
871 if (ret < 0) {
872 kfree(dev->data_cb_info);
873 free_urbs(dev->data_urbs_in);
874 free_urbs(dev->data_urbs_out);
875 return ret;
876 }
877
878 return 0;
879 }
880
881 void snd_usb_caiaq_audio_free(struct snd_usb_caiaqdev *dev)
882 {
883 debug("%s(%p)\n", __func__, dev);
884 stream_stop(dev);
885 free_urbs(dev->data_urbs_in);
886 free_urbs(dev->data_urbs_out);
887 kfree(dev->data_cb_info);
888 }
889