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ALSA: usb-audio: add Yamaha MOX6/MOX8 support
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / sound / usb / caiaq / audio.c
CommitLineData
523f1dce 1/*
8d048841 2 * Copyright (c) 2006-2008 Daniel Mack, Karsten Wiese
523f1dce
DM		 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
e431cf45 19#include <linux/spinlock.h>
5a0e3ad6 20#include <linux/slab.h>
523f1dce 21#include <linux/init.h>
523f1dce 22#include <linux/usb.h>
523f1dce 23#include <sound/core.h>
523f1dce 24#include <sound/pcm.h>
523f1dce 25
936e7d03
DM		 26#include "device.h"
27#include "audio.h"
523f1dce
DM		 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)
6e9fc6bd
DM		 37#define MAX_ENDPOINT_SIZE 512
38
523f1dce
DM		 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
45static struct snd_pcm_hardware snd_usb_caiaq_pcm_hardware = {
9318dce5 46 .info = (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
523f1dce
DM		 47 SNDRV_PCM_INFO_BLOCK_TRANSFER),
48 .formats = SNDRV_PCM_FMTBIT_S24_3BE,
9318dce5 49 .rates = (SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000 |
523f1dce
DM		 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,
09189ac7 56 .period_bytes_min = 128,
523f1dce
DM		 57 .period_bytes_max = MAX_BUFFER_SIZE,
58 .periods_min = 1,
59 .periods_max = 1024,
60};
61
62static void
63activate_substream(struct snd_usb_caiaqdev *dev,
64 struct snd_pcm_substream *sub)
65{
ac9dd9d3
MH		 66 spin_lock(&dev->spinlock);
67
523f1dce
DM		 68 if (sub->stream == SNDRV_PCM_STREAM_PLAYBACK)
69 dev->sub_playback[sub->number] = sub;
70 else
71 dev->sub_capture[sub->number] = sub;
ac9dd9d3
MH		 72
73 spin_unlock(&dev->spinlock);
523f1dce
DM		 74}
75
9318dce5 76static void
523f1dce
DM		 77deactivate_substream(struct snd_usb_caiaqdev *dev,
78 struct snd_pcm_substream *sub)
79{
8d048841
DM		 80 unsigned long flags;
81 spin_lock_irqsave(&dev->spinlock, flags);
82
523f1dce
DM		 83 if (sub->stream == SNDRV_PCM_STREAM_PLAYBACK)
84 dev->sub_playback[sub->number] = NULL;
85 else
86 dev->sub_capture[sub->number] = NULL;
8d048841
DM		 87
88 spin_unlock_irqrestore(&dev->spinlock, flags);
523f1dce
DM		 89}
90
91static int
92all_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
101static int stream_start(struct snd_usb_caiaqdev *dev)
102{
103 int i, ret;
104
8d048841
DM		 105 debug("%s(%p)\n", __func__, dev);
106
107 if (dev->streaming)
523f1dce 108 return -EINVAL;
523f1dce 109
8d048841
DM		 110 memset(dev->sub_playback, 0, sizeof(dev->sub_playback));
111 memset(dev->sub_capture, 0, sizeof(dev->sub_capture));
523f1dce
DM		 112 dev->input_panic = 0;
113 dev->output_panic = 0;
15c5ab60 114 dev->first_packet = 4;
523f1dce 115 dev->streaming = 1;
1313e704 116 dev->warned = 0;
523f1dce
DM		 117
118 for (i = 0; i < N_URBS; i++) {
119 ret = usb_submit_urb(dev->data_urbs_in[i], GFP_ATOMIC);
120 if (ret) {
8d048841 121 log("unable to trigger read #%d! (ret %d)\n", i, ret);
523f1dce 122 dev->streaming = 0;
523f1dce
DM		 123 return -EPIPE;
124 }
125 }
9318dce5 126
523f1dce
DM		 127 return 0;
128}
129
130static void stream_stop(struct snd_usb_caiaqdev *dev)
131{
132 int i;
8d048841
DM		 133
134 debug("%s(%p)\n", __func__, dev);
523f1dce
DM		 135 if (!dev->streaming)
136 return;
9318dce5 137
523f1dce 138 dev->streaming = 0;
8d048841 139
523f1dce 140 for (i = 0; i < N_URBS; i++) {
8d048841 141 usb_kill_urb(dev->data_urbs_in[i]);
da6094ea
DM		 142
143 if (test_bit(i, &dev->outurb_active_mask))
144 usb_kill_urb(dev->data_urbs_out[i]);
523f1dce 145 }
da6094ea
DM		 146
147 dev->outurb_active_mask = 0;
523f1dce
DM		 148}
149
150static int snd_usb_caiaq_substream_open(struct snd_pcm_substream *substream)
151{
152 struct snd_usb_caiaqdev *dev = snd_pcm_substream_chip(substream);
8d048841 153 debug("%s(%p)\n", __func__, substream);
523f1dce
DM		 154 substream->runtime->hw = dev->pcm_info;
155 snd_pcm_limit_hw_rates(substream->runtime);
156 return 0;
157}
158
159static int snd_usb_caiaq_substream_close(struct snd_pcm_substream *substream)
160{
161 struct snd_usb_caiaqdev *dev = snd_pcm_substream_chip(substream);
162
8d048841 163 debug("%s(%p)\n", __func__, substream);
523f1dce
DM		 164 if (all_substreams_zero(dev->sub_playback) &&
165 all_substreams_zero(dev->sub_capture)) {
9318dce5 166 /* when the last client has stopped streaming,
523f1dce
DM		 167 * all sample rates are allowed again */
168 stream_stop(dev);
169 dev->pcm_info.rates = dev->samplerates;
170 }
8d048841 171
523f1dce
DM		 172 return 0;
173}
174
175static int snd_usb_caiaq_pcm_hw_params(struct snd_pcm_substream *sub,
15c5ab60 176 struct snd_pcm_hw_params *hw_params)
523f1dce 177{
8d048841 178 debug("%s(%p)\n", __func__, sub);
523f1dce
DM		 179 return snd_pcm_lib_malloc_pages(sub, params_buffer_bytes(hw_params));
180}
181
182static int snd_usb_caiaq_pcm_hw_free(struct snd_pcm_substream *sub)
183{
184 struct snd_usb_caiaqdev *dev = snd_pcm_substream_chip(sub);
8d048841 185 debug("%s(%p)\n", __func__, sub);
523f1dce 186 deactivate_substream(dev, sub);
523f1dce
DM		 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
195static unsigned int rates[] = { 5512, 8000, 11025, 16000, 22050, 32000, 44100,
15c5ab60 196 48000, 64000, 88200, 96000, 176400, 192000 };
523f1dce
DM		 197
198static 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
8d048841 205 debug("%s(%p)\n", __func__, substream);
9318dce5 206
a9b487fa 207 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
15c5ab60
DM		 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;
a9b487fa 223 } else {
15c5ab60
DM		 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;
a9b487fa
DM		 241 }
242
523f1dce
DM		 243 if (dev->streaming)
244 return 0;
9318dce5 245
523f1dce
DM		 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;
9318dce5 251
523f1dce
DM		 252 snd_pcm_limit_hw_rates(runtime);
253
254 bytes_per_sample = BYTES_PER_SAMPLE;
15c5ab60 255 if (dev->spec.data_alignment >= 2)
523f1dce 256 bytes_per_sample++;
9318dce5 257
523f1dce
DM		 258 bpp = ((runtime->rate / 8000) + CLOCK_DRIFT_TOLERANCE)
259 * bytes_per_sample * CHANNELS_PER_STREAM * dev->n_streams;
6e9fc6bd
DM		 260
261 if (bpp > MAX_ENDPOINT_SIZE)
262 bpp = MAX_ENDPOINT_SIZE;
263
523f1dce
DM		 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;
9318dce5 272
523f1dce
DM		 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
283static 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
15c5ab60
DM		 287 debug("%s(%p) cmd %d\n", __func__, sub, cmd);
288
523f1dce
DM		 289 switch (cmd) {
290 case SNDRV_PCM_TRIGGER_START:
291 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
523f1dce 292 activate_substream(dev, sub);
523f1dce
DM		 293 break;
294 case SNDRV_PCM_TRIGGER_STOP:
295 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
523f1dce 296 deactivate_substream(dev, sub);
523f1dce
DM		 297 break;
298 default:
299 return -EINVAL;
300 }
301
302 return 0;
303}
304
305static snd_pcm_uframes_t
306snd_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);
3702b082
MH		 310 snd_pcm_uframes_t ptr;
311
312 spin_lock(&dev->spinlock);
523f1dce
DM		 313
314 if (dev->input_panic || dev->output_panic)
3702b082 315 ptr = SNDRV_PCM_POS_XRUN;
523f1dce
DM		 316
317 if (sub->stream == SNDRV_PCM_STREAM_PLAYBACK)
3702b082 318 ptr = bytes_to_frames(sub->runtime,
523f1dce
DM		 319 dev->audio_out_buf_pos[index]);
320 else
3702b082 321 ptr = bytes_to_frames(sub->runtime,
523f1dce 322 dev->audio_in_buf_pos[index]);
3702b082
MH		 323
324 spin_unlock(&dev->spinlock);
325 return ptr;
523f1dce
DM		 326}
327
328/* operators for both playback and capture */
329static struct snd_pcm_ops snd_usb_caiaq_ops = {
330 .open = snd_usb_caiaq_substream_open,
331 .close = snd_usb_caiaq_substream_close,
332 .ioctl = snd_pcm_lib_ioctl,
333 .hw_params = snd_usb_caiaq_pcm_hw_params,
334 .hw_free = snd_usb_caiaq_pcm_hw_free,
335 .prepare = snd_usb_caiaq_pcm_prepare,
336 .trigger = snd_usb_caiaq_pcm_trigger,
337 .pointer = snd_usb_caiaq_pcm_pointer
338};
9318dce5 339
523f1dce
DM		 340static void check_for_elapsed_periods(struct snd_usb_caiaqdev *dev,
341 struct snd_pcm_substream **subs)
342{
343 int stream, pb, *cnt;
344 struct snd_pcm_substream *sub;
345
346 for (stream = 0; stream < dev->n_streams; stream++) {
347 sub = subs[stream];
348 if (!sub)
349 continue;
350
a9b487fa 351 pb = snd_pcm_lib_period_bytes(sub);
523f1dce
DM		 352 cnt = (sub->stream == SNDRV_PCM_STREAM_PLAYBACK) ?
353 &dev->period_out_count[stream] :
354 &dev->period_in_count[stream];
355
356 if (*cnt >= pb) {
357 snd_pcm_period_elapsed(sub);
358 *cnt %= pb;
359 }
360 }
361}
362
363static void read_in_urb_mode0(struct snd_usb_caiaqdev *dev,
364 const struct urb *urb,
365 const struct usb_iso_packet_descriptor *iso)
366{
367 unsigned char *usb_buf = urb->transfer_buffer + iso->offset;
368 struct snd_pcm_substream *sub;
369 int stream, i;
370
371 if (all_substreams_zero(dev->sub_capture))
372 return;
373
523f1dce
DM		 374 for (i = 0; i < iso->actual_length;) {
375 for (stream = 0; stream < dev->n_streams; stream++, i++) {
376 sub = dev->sub_capture[stream];
377 if (sub) {
378 struct snd_pcm_runtime *rt = sub->runtime;
379 char *audio_buf = rt->dma_area;
380 int sz = frames_to_bytes(rt, rt->buffer_size);
9318dce5 381 audio_buf[dev->audio_in_buf_pos[stream]++]
523f1dce
DM		 382 = usb_buf[i];
383 dev->period_in_count[stream]++;
384 if (dev->audio_in_buf_pos[stream] == sz)
385 dev->audio_in_buf_pos[stream] = 0;
386 }
387 }
388 }
523f1dce
DM		 389}
390
391static void read_in_urb_mode2(struct snd_usb_caiaqdev *dev,
392 const struct urb *urb,
393 const struct usb_iso_packet_descriptor *iso)
394{
395 unsigned char *usb_buf = urb->transfer_buffer + iso->offset;
396 unsigned char check_byte;
397 struct snd_pcm_substream *sub;
398 int stream, i;
399
523f1dce
DM		 400 for (i = 0; i < iso->actual_length;) {
401 if (i % (dev->n_streams * BYTES_PER_SAMPLE_USB) == 0) {
9318dce5
DM		 402 for (stream = 0;
403 stream < dev->n_streams;
523f1dce
DM		 404 stream++, i++) {
405 if (dev->first_packet)
406 continue;
407
408 check_byte = MAKE_CHECKBYTE(dev, stream, i);
9318dce5 409
523f1dce
DM		 410 if ((usb_buf[i] & 0x3f) != check_byte)
411 dev->input_panic = 1;
412
413 if (usb_buf[i] & 0x80)
414 dev->output_panic = 1;
415 }
416 }
417 dev->first_packet = 0;
418
419 for (stream = 0; stream < dev->n_streams; stream++, i++) {
420 sub = dev->sub_capture[stream];
9311c9b4
DM		 421 if (dev->input_panic)
422 usb_buf[i] = 0;
423
523f1dce
DM		 424 if (sub) {
425 struct snd_pcm_runtime *rt = sub->runtime;
426 char *audio_buf = rt->dma_area;
427 int sz = frames_to_bytes(rt, rt->buffer_size);
a971c3d4
KW		 428 audio_buf[dev->audio_in_buf_pos[stream]++] =
429 usb_buf[i];
523f1dce
DM		 430 dev->period_in_count[stream]++;
431 if (dev->audio_in_buf_pos[stream] == sz)
432 dev->audio_in_buf_pos[stream] = 0;
433 }
434 }
435 }
523f1dce
DM		 436}
437
15c5ab60
DM		 438static void read_in_urb_mode3(struct snd_usb_caiaqdev *dev,
439 const struct urb *urb,
440 const struct usb_iso_packet_descriptor *iso)
441{
442 unsigned char *usb_buf = urb->transfer_buffer + iso->offset;
443 int stream, i;
444
445 /* paranoia check */
446 if (iso->actual_length % (BYTES_PER_SAMPLE_USB * CHANNELS_PER_STREAM))
447 return;
448
449 for (i = 0; i < iso->actual_length;) {
450 for (stream = 0; stream < dev->n_streams; stream++) {
451 struct snd_pcm_substream *sub = dev->sub_capture[stream];
452 char *audio_buf = NULL;
453 int c, n, sz = 0;
454
455 if (sub && !dev->input_panic) {
456 struct snd_pcm_runtime *rt = sub->runtime;
457 audio_buf = rt->dma_area;
458 sz = frames_to_bytes(rt, rt->buffer_size);
459 }
460
461 for (c = 0; c < CHANNELS_PER_STREAM; c++) {
462 /* 3 audio data bytes, followed by 1 check byte */
463 if (audio_buf) {
464 for (n = 0; n < BYTES_PER_SAMPLE; n++) {
465 audio_buf[dev->audio_in_buf_pos[stream]++] = usb_buf[i+n];
466
467 if (dev->audio_in_buf_pos[stream] == sz)
468 dev->audio_in_buf_pos[stream] = 0;
469 }
470
471 dev->period_in_count[stream] += BYTES_PER_SAMPLE;
472 }
473
474 i += BYTES_PER_SAMPLE;
475
476 if (usb_buf[i] != ((stream << 1) | c) &&
477 !dev->first_packet) {
478 if (!dev->input_panic)
479 printk(" EXPECTED: %02x got %02x, c %d, stream %d, i %d\n",
480 ((stream << 1) | c), usb_buf[i], c, stream, i);
481 dev->input_panic = 1;
482 }
483
484 i++;
485 }
486 }
487 }
488
489 if (dev->first_packet > 0)
490 dev->first_packet--;
491}
492
523f1dce
DM		 493static void read_in_urb(struct snd_usb_caiaqdev *dev,
494 const struct urb *urb,
495 const struct usb_iso_packet_descriptor *iso)
496{
497 if (!dev->streaming)
498 return;
499
9311c9b4
DM		 500 if (iso->actual_length < dev->bpp)
501 return;
502
523f1dce
DM		 503 switch (dev->spec.data_alignment) {
504 case 0:
505 read_in_urb_mode0(dev, urb, iso);
506 break;
507 case 2:
508 read_in_urb_mode2(dev, urb, iso);
509 break;
15c5ab60
DM		 510 case 3:
511 read_in_urb_mode3(dev, urb, iso);
512 break;
523f1dce
DM		 513 }
514
1313e704 515 if ((dev->input_panic || dev->output_panic) && !dev->warned) {
9318dce5 516 debug("streaming error detected %s %s\n",
523f1dce
DM		 517 dev->input_panic ? "(input)" : "",
518 dev->output_panic ? "(output)" : "");
1313e704 519 dev->warned = 1;
523f1dce 520 }
523f1dce
DM		 521}
522
15c5ab60
DM		 523static void fill_out_urb_mode_0(struct snd_usb_caiaqdev *dev,
524 struct urb *urb,
525 const struct usb_iso_packet_descriptor *iso)
523f1dce
DM		 526{
527 unsigned char *usb_buf = urb->transfer_buffer + iso->offset;
528 struct snd_pcm_substream *sub;
529 int stream, i;
9318dce5 530
523f1dce 531 for (i = 0; i < iso->length;) {
a971c3d4 532 for (stream = 0; stream < dev->n_streams; stream++, i++) {
523f1dce
DM		 533 sub = dev->sub_playback[stream];
534 if (sub) {
535 struct snd_pcm_runtime *rt = sub->runtime;
536 char *audio_buf = rt->dma_area;
537 int sz = frames_to_bytes(rt, rt->buffer_size);
a971c3d4
KW		 538 usb_buf[i] =
539 audio_buf[dev->audio_out_buf_pos[stream]];
540 dev->period_out_count[stream]++;
523f1dce
DM		 541 dev->audio_out_buf_pos[stream]++;
542 if (dev->audio_out_buf_pos[stream] == sz)
543 dev->audio_out_buf_pos[stream] = 0;
544 } else
a971c3d4
KW		 545 usb_buf[i] = 0;
546 }
523f1dce
DM		 547
548 /* fill in the check bytes */
549 if (dev->spec.data_alignment == 2 &&
9318dce5 550 i % (dev->n_streams * BYTES_PER_SAMPLE_USB) ==
15c5ab60
DM		 551 (dev->n_streams * CHANNELS_PER_STREAM))
552 for (stream = 0; stream < dev->n_streams; stream++, i++)
553 usb_buf[i] = MAKE_CHECKBYTE(dev, stream, i);
554 }
555}
556
557static void fill_out_urb_mode_3(struct snd_usb_caiaqdev *dev,
558 struct urb *urb,
559 const struct usb_iso_packet_descriptor *iso)
560{
561 unsigned char *usb_buf = urb->transfer_buffer + iso->offset;
562 int stream, i;
563
564 for (i = 0; i < iso->length;) {
565 for (stream = 0; stream < dev->n_streams; stream++) {
566 struct snd_pcm_substream *sub = dev->sub_playback[stream];
567 char *audio_buf = NULL;
568 int c, n, sz = 0;
569
570 if (sub) {
571 struct snd_pcm_runtime *rt = sub->runtime;
572 audio_buf = rt->dma_area;
573 sz = frames_to_bytes(rt, rt->buffer_size);
574 }
575
576 for (c = 0; c < CHANNELS_PER_STREAM; c++) {
577 for (n = 0; n < BYTES_PER_SAMPLE; n++) {
578 if (audio_buf) {
579 usb_buf[i+n] = audio_buf[dev->audio_out_buf_pos[stream]++];
580
581 if (dev->audio_out_buf_pos[stream] == sz)
582 dev->audio_out_buf_pos[stream] = 0;
583 } else {
584 usb_buf[i+n] = 0;
585 }
586 }
587
588 if (audio_buf)
589 dev->period_out_count[stream] += BYTES_PER_SAMPLE;
590
591 i += BYTES_PER_SAMPLE;
592
593 /* fill in the check byte pattern */
594 usb_buf[i++] = (stream << 1) | c;
595 }
596 }
597 }
598}
599
600static inline void fill_out_urb(struct snd_usb_caiaqdev *dev,
601 struct urb *urb,
602 const struct usb_iso_packet_descriptor *iso)
603{
604 switch (dev->spec.data_alignment) {
605 case 0:
606 case 2:
607 fill_out_urb_mode_0(dev, urb, iso);
608 break;
609 case 3:
610 fill_out_urb_mode_3(dev, urb, iso);
611 break;
523f1dce 612 }
523f1dce
DM		 613}
614
615static void read_completed(struct urb *urb)
616{
9318dce5 617 struct snd_usb_caiaq_cb_info *info = urb->context;
523f1dce 618 struct snd_usb_caiaqdev *dev;
da6094ea
DM		 619 struct urb *out = NULL;
620 int i, frame, len, send_it = 0, outframe = 0;
15439bde 621 size_t offset = 0;
523f1dce
DM		 622
623 if (urb->status || !info)
624 return;
625
626 dev = info->dev;
8d048841 627
523f1dce
DM		 628 if (!dev->streaming)
629 return;
630
da6094ea
DM		 631 /* find an unused output urb that is unused */
632 for (i = 0; i < N_URBS; i++)
633 if (test_and_set_bit(i, &dev->outurb_active_mask) == 0) {
634 out = dev->data_urbs_out[i];
635 break;
636 }
637
638 if (!out) {
639 log("Unable to find an output urb to use\n");
640 goto requeue;
641 }
523f1dce
DM		 642
643 /* read the recently received packet and send back one which has
644 * the same layout */
645 for (frame = 0; frame < FRAMES_PER_URB; frame++) {
646 if (urb->iso_frame_desc[frame].status)
647 continue;
648
649 len = urb->iso_frame_desc[outframe].actual_length;
650 out->iso_frame_desc[outframe].length = len;
651 out->iso_frame_desc[outframe].actual_length = 0;
15439bde
DM		 652 out->iso_frame_desc[outframe].offset = offset;
653 offset += len;
9318dce5 654
523f1dce 655 if (len > 0) {
8d048841 656 spin_lock(&dev->spinlock);
523f1dce
DM		 657 fill_out_urb(dev, out, &out->iso_frame_desc[outframe]);
658 read_in_urb(dev, urb, &urb->iso_frame_desc[frame]);
8d048841
DM		 659 spin_unlock(&dev->spinlock);
660 check_for_elapsed_periods(dev, dev->sub_playback);
661 check_for_elapsed_periods(dev, dev->sub_capture);
523f1dce
DM		 662 send_it = 1;
663 }
664
665 outframe++;
666 }
667
668 if (send_it) {
15439bde 669 out->number_of_packets = outframe;
523f1dce
DM		 670 out->transfer_flags = URB_ISO_ASAP;
671 usb_submit_urb(out, GFP_ATOMIC);
da6094ea
DM		 672 } else {
673 struct snd_usb_caiaq_cb_info *oinfo = out->context;
674 clear_bit(oinfo->index, &dev->outurb_active_mask);
523f1dce 675 }
9318dce5 676
da6094ea 677requeue:
523f1dce
DM		 678 /* re-submit inbound urb */
679 for (frame = 0; frame < FRAMES_PER_URB; frame++) {
680 urb->iso_frame_desc[frame].offset = BYTES_PER_FRAME * frame;
681 urb->iso_frame_desc[frame].length = BYTES_PER_FRAME;
682 urb->iso_frame_desc[frame].actual_length = 0;
683 }
9318dce5 684
523f1dce
DM		 685 urb->number_of_packets = FRAMES_PER_URB;
686 urb->transfer_flags = URB_ISO_ASAP;
687 usb_submit_urb(urb, GFP_ATOMIC);
688}
689
690static void write_completed(struct urb *urb)
691{
692 struct snd_usb_caiaq_cb_info *info = urb->context;
693 struct snd_usb_caiaqdev *dev = info->dev;
694
695 if (!dev->output_running) {
696 dev->output_running = 1;
697 wake_up(&dev->prepare_wait_queue);
698 }
da6094ea
DM		 699
700 clear_bit(info->index, &dev->outurb_active_mask);
523f1dce
DM		 701}
702
703static struct urb **alloc_urbs(struct snd_usb_caiaqdev *dev, int dir, int *ret)
704{
705 int i, frame;
706 struct urb **urbs;
707 struct usb_device *usb_dev = dev->chip.dev;
708 unsigned int pipe;
709
9318dce5 710 pipe = (dir == SNDRV_PCM_STREAM_PLAYBACK) ?
523f1dce
DM		 711 usb_sndisocpipe(usb_dev, ENDPOINT_PLAYBACK) :
712 usb_rcvisocpipe(usb_dev, ENDPOINT_CAPTURE);
713
714 urbs = kmalloc(N_URBS * sizeof(*urbs), GFP_KERNEL);
715 if (!urbs) {
716 log("unable to kmalloc() urbs, OOM!?\n");
717 *ret = -ENOMEM;
718 return NULL;
719 }
720
721 for (i = 0; i < N_URBS; i++) {
722 urbs[i] = usb_alloc_urb(FRAMES_PER_URB, GFP_KERNEL);
723 if (!urbs[i]) {
724 log("unable to usb_alloc_urb(), OOM!?\n");
725 *ret = -ENOMEM;
726 return urbs;
727 }
728
9318dce5 729 urbs[i]->transfer_buffer =
523f1dce
DM		 730 kmalloc(FRAMES_PER_URB * BYTES_PER_FRAME, GFP_KERNEL);
731 if (!urbs[i]->transfer_buffer) {
732 log("unable to kmalloc() transfer buffer, OOM!?\n");
733 *ret = -ENOMEM;
734 return urbs;
735 }
9318dce5 736
523f1dce 737 for (frame = 0; frame < FRAMES_PER_URB; frame++) {
9318dce5 738 struct usb_iso_packet_descriptor *iso =
523f1dce 739 &urbs[i]->iso_frame_desc[frame];
9318dce5 740
523f1dce
DM		 741 iso->offset = BYTES_PER_FRAME * frame;
742 iso->length = BYTES_PER_FRAME;
743 }
9318dce5 744
523f1dce
DM		 745 urbs[i]->dev = usb_dev;
746 urbs[i]->pipe = pipe;
9318dce5 747 urbs[i]->transfer_buffer_length = FRAMES_PER_URB
523f1dce
DM		 748 * BYTES_PER_FRAME;
749 urbs[i]->context = &dev->data_cb_info[i];
750 urbs[i]->interval = 1;
751 urbs[i]->transfer_flags = URB_ISO_ASAP;
752 urbs[i]->number_of_packets = FRAMES_PER_URB;
753 urbs[i]->complete = (dir == SNDRV_PCM_STREAM_CAPTURE) ?
754 read_completed : write_completed;
755 }
756
757 *ret = 0;
758 return urbs;
759}
760
761static void free_urbs(struct urb **urbs)
762{
763 int i;
764
765 if (!urbs)
766 return;
767
768 for (i = 0; i < N_URBS; i++) {
769 if (!urbs[i])
770 continue;
9318dce5 771
523f1dce
DM		 772 usb_kill_urb(urbs[i]);
773 kfree(urbs[i]->transfer_buffer);
774 usb_free_urb(urbs[i]);
775 }
776
777 kfree(urbs);
778}
779
599c3e76 780int snd_usb_caiaq_audio_init(struct snd_usb_caiaqdev *dev)
523f1dce
DM		 781{
782 int i, ret;
783
9318dce5
DM		 784 dev->n_audio_in = max(dev->spec.num_analog_audio_in,
785 dev->spec.num_digital_audio_in) /
523f1dce
DM		 786 CHANNELS_PER_STREAM;
787 dev->n_audio_out = max(dev->spec.num_analog_audio_out,
9318dce5 788 dev->spec.num_digital_audio_out) /
523f1dce
DM		 789 CHANNELS_PER_STREAM;
790 dev->n_streams = max(dev->n_audio_in, dev->n_audio_out);
791
792 debug("dev->n_audio_in = %d\n", dev->n_audio_in);
793 debug("dev->n_audio_out = %d\n", dev->n_audio_out);
794 debug("dev->n_streams = %d\n", dev->n_streams);
795
796 if (dev->n_streams > MAX_STREAMS) {
797 log("unable to initialize device, too many streams.\n");
798 return -EINVAL;
799 }
800
9318dce5 801 ret = snd_pcm_new(dev->chip.card, dev->product_name, 0,
523f1dce
DM		 802 dev->n_audio_out, dev->n_audio_in, &dev->pcm);
803
804 if (ret < 0) {
805 log("snd_pcm_new() returned %d\n", ret);
806 return ret;
807 }
808
809 dev->pcm->private_data = dev;
eaae55da 810 strlcpy(dev->pcm->name, dev->product_name, sizeof(dev->pcm->name));
523f1dce
DM		 811
812 memset(dev->sub_playback, 0, sizeof(dev->sub_playback));
813 memset(dev->sub_capture, 0, sizeof(dev->sub_capture));
9318dce5 814
523f1dce
DM		 815 memcpy(&dev->pcm_info, &snd_usb_caiaq_pcm_hardware,
816 sizeof(snd_usb_caiaq_pcm_hardware));
817
818 /* setup samplerates */
819 dev->samplerates = dev->pcm_info.rates;
820 switch (dev->chip.usb_id) {
821 case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_AK1):
ad1e34b5 822 case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_RIGKONTROL3):
f3e9d5d1 823 case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_SESSIONIO):
2165592b 824 case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_GUITARRIGMOBILE):
523f1dce 825 dev->samplerates |= SNDRV_PCM_RATE_192000;
2165592b 826 /* fall thru */
b30c4947 827 case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_AUDIO2DJ):
2165592b 828 case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_AUDIO4DJ):
523f1dce 829 case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_AUDIO8DJ):
df8d81a3 830 case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_TRAKTORAUDIO2):
523f1dce
DM		 831 dev->samplerates |= SNDRV_PCM_RATE_88200;
832 break;
833 }
834
9318dce5 835 snd_pcm_set_ops(dev->pcm, SNDRV_PCM_STREAM_PLAYBACK,
523f1dce 836 &snd_usb_caiaq_ops);
9318dce5 837 snd_pcm_set_ops(dev->pcm, SNDRV_PCM_STREAM_CAPTURE,
523f1dce
DM		 838 &snd_usb_caiaq_ops);
839
840 snd_pcm_lib_preallocate_pages_for_all(dev->pcm,
841 SNDRV_DMA_TYPE_CONTINUOUS,
842 snd_dma_continuous_data(GFP_KERNEL),
843 MAX_BUFFER_SIZE, MAX_BUFFER_SIZE);
844
845 dev->data_cb_info =
9318dce5 846 kmalloc(sizeof(struct snd_usb_caiaq_cb_info) * N_URBS,
523f1dce
DM		 847 GFP_KERNEL);
848
849 if (!dev->data_cb_info)
850 return -ENOMEM;
851
da6094ea
DM		 852 dev->outurb_active_mask = 0;
853 BUILD_BUG_ON(N_URBS > (sizeof(dev->outurb_active_mask) * 8));
854
523f1dce
DM		 855 for (i = 0; i < N_URBS; i++) {
856 dev->data_cb_info[i].dev = dev;
857 dev->data_cb_info[i].index = i;
858 }
9318dce5 859
523f1dce
DM		 860 dev->data_urbs_in = alloc_urbs(dev, SNDRV_PCM_STREAM_CAPTURE, &ret);
861 if (ret < 0) {
862 kfree(dev->data_cb_info);
863 free_urbs(dev->data_urbs_in);
864 return ret;
865 }
9318dce5 866
523f1dce
DM		 867 dev->data_urbs_out = alloc_urbs(dev, SNDRV_PCM_STREAM_PLAYBACK, &ret);
868 if (ret < 0) {
869 kfree(dev->data_cb_info);
870 free_urbs(dev->data_urbs_in);
871 free_urbs(dev->data_urbs_out);
872 return ret;
873 }
874
875 return 0;
876}
877
878void snd_usb_caiaq_audio_free(struct snd_usb_caiaqdev *dev)
879{
8d048841 880 debug("%s(%p)\n", __func__, dev);
523f1dce
DM		 881 stream_stop(dev);
882 free_urbs(dev->data_urbs_in);
883 free_urbs(dev->data_urbs_out);
884 kfree(dev->data_cb_info);
885}
886
kernel source for telekom puls (alcatel/mediatek)