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Add linux-next specific files for 20110716
[linux-2.6/next.git] / sound / soc / soc-pcm.c
blobb5759397afa342a89fe494b51d2d97e2a0d3e346
1 /*
2 * soc-pcm.c -- ALSA SoC PCM
3 *
4 * Copyright 2005 Wolfson Microelectronics PLC.
5 * Copyright 2005 Openedhand Ltd.
6 * Copyright (C) 2010 Slimlogic Ltd.
7 * Copyright (C) 2010 Texas Instruments Inc.
8 *
9 * Authors: Liam Girdwood <lrg@ti.com>
10 * Mark Brown <broonie@opensource.wolfsonmicro.com>
11 *
12 * This program is free software; you can redistribute it and/or modify it
13 * under the terms of the GNU General Public License as published by the
14 * Free Software Foundation; either version 2 of the License, or (at your
15 * option) any later version.
16 *
17 */
18
19 #include <linux/kernel.h>
20 #include <linux/init.h>
21 #include <linux/delay.h>
22 #include <linux/slab.h>
23 #include <linux/workqueue.h>
24 #include <sound/core.h>
25 #include <sound/pcm.h>
26 #include <sound/pcm_params.h>
27 #include <sound/soc.h>
28 #include <sound/initval.h>
29
30 static DEFINE_MUTEX(pcm_mutex);
31
32 static int soc_pcm_apply_symmetry(struct snd_pcm_substream *substream)
33 {
34 struct snd_soc_pcm_runtime *rtd = substream->private_data;
35 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
36 struct snd_soc_dai *codec_dai = rtd->codec_dai;
37 int ret;
38
39 if (!codec_dai->driver->symmetric_rates &&
40 !cpu_dai->driver->symmetric_rates &&
41 !rtd->dai_link->symmetric_rates)
42 return 0;
43
44 /* This can happen if multiple streams are starting simultaneously -
45 * the second can need to get its constraints before the first has
46 * picked a rate. Complain and allow the application to carry on.
47 */
48 if (!rtd->rate) {
49 dev_warn(&rtd->dev,
50 "Not enforcing symmetric_rates due to race\n");
51 return 0;
52 }
53
54 dev_dbg(&rtd->dev, "Symmetry forces %dHz rate\n", rtd->rate);
55
56 ret = snd_pcm_hw_constraint_minmax(substream->runtime,
57 SNDRV_PCM_HW_PARAM_RATE,
58 rtd->rate, rtd->rate);
59 if (ret < 0) {
60 dev_err(&rtd->dev,
61 "Unable to apply rate symmetry constraint: %d\n", ret);
62 return ret;
63 }
64
65 return 0;
66 }
67
68 /*
69 * Called by ALSA when a PCM substream is opened, the runtime->hw record is
70 * then initialized and any private data can be allocated. This also calls
71 * startup for the cpu DAI, platform, machine and codec DAI.
72 */
73 static int soc_pcm_open(struct snd_pcm_substream *substream)
74 {
75 struct snd_soc_pcm_runtime *rtd = substream->private_data;
76 struct snd_pcm_runtime *runtime = substream->runtime;
77 struct snd_soc_platform *platform = rtd->platform;
78 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
79 struct snd_soc_dai *codec_dai = rtd->codec_dai;
80 struct snd_soc_dai_driver *cpu_dai_drv = cpu_dai->driver;
81 struct snd_soc_dai_driver *codec_dai_drv = codec_dai->driver;
82 int ret = 0;
83
84 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
85
86 /* startup the audio subsystem */
87 if (cpu_dai->driver->ops->startup) {
88 ret = cpu_dai->driver->ops->startup(substream, cpu_dai);
89 if (ret < 0) {
90 printk(KERN_ERR "asoc: can't open interface %s\n",
91 cpu_dai->name);
92 goto out;
93 }
94 }
95
96 if (platform->driver->ops && platform->driver->ops->open) {
97 ret = platform->driver->ops->open(substream);
98 if (ret < 0) {
99 printk(KERN_ERR "asoc: can't open platform %s\n", platform->name);
100 goto platform_err;
101 }
102 }
103
104 if (codec_dai->driver->ops->startup) {
105 ret = codec_dai->driver->ops->startup(substream, codec_dai);
106 if (ret < 0) {
107 printk(KERN_ERR "asoc: can't open codec %s\n",
108 codec_dai->name);
109 goto codec_dai_err;
110 }
111 }
112
113 if (rtd->dai_link->ops && rtd->dai_link->ops->startup) {
114 ret = rtd->dai_link->ops->startup(substream);
115 if (ret < 0) {
116 printk(KERN_ERR "asoc: %s startup failed\n", rtd->dai_link->name);
117 goto machine_err;
118 }
119 }
120
121 /* Check that the codec and cpu DAIs are compatible */
122 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
123 runtime->hw.rate_min =
124 max(codec_dai_drv->playback.rate_min,
125 cpu_dai_drv->playback.rate_min);
126 runtime->hw.rate_max =
127 min(codec_dai_drv->playback.rate_max,
128 cpu_dai_drv->playback.rate_max);
129 runtime->hw.channels_min =
130 max(codec_dai_drv->playback.channels_min,
131 cpu_dai_drv->playback.channels_min);
132 runtime->hw.channels_max =
133 min(codec_dai_drv->playback.channels_max,
134 cpu_dai_drv->playback.channels_max);
135 runtime->hw.formats =
136 codec_dai_drv->playback.formats & cpu_dai_drv->playback.formats;
137 runtime->hw.rates =
138 codec_dai_drv->playback.rates & cpu_dai_drv->playback.rates;
139 if (codec_dai_drv->playback.rates
140 & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))
141 runtime->hw.rates |= cpu_dai_drv->playback.rates;
142 if (cpu_dai_drv->playback.rates
143 & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))
144 runtime->hw.rates |= codec_dai_drv->playback.rates;
145 } else {
146 runtime->hw.rate_min =
147 max(codec_dai_drv->capture.rate_min,
148 cpu_dai_drv->capture.rate_min);
149 runtime->hw.rate_max =
150 min(codec_dai_drv->capture.rate_max,
151 cpu_dai_drv->capture.rate_max);
152 runtime->hw.channels_min =
153 max(codec_dai_drv->capture.channels_min,
154 cpu_dai_drv->capture.channels_min);
155 runtime->hw.channels_max =
156 min(codec_dai_drv->capture.channels_max,
157 cpu_dai_drv->capture.channels_max);
158 runtime->hw.formats =
159 codec_dai_drv->capture.formats & cpu_dai_drv->capture.formats;
160 runtime->hw.rates =
161 codec_dai_drv->capture.rates & cpu_dai_drv->capture.rates;
162 if (codec_dai_drv->capture.rates
163 & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))
164 runtime->hw.rates |= cpu_dai_drv->capture.rates;
165 if (cpu_dai_drv->capture.rates
166 & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))
167 runtime->hw.rates |= codec_dai_drv->capture.rates;
168 }
169
170 ret = -EINVAL;
171 snd_pcm_limit_hw_rates(runtime);
172 if (!runtime->hw.rates) {
173 printk(KERN_ERR "asoc: %s <-> %s No matching rates\n",
174 codec_dai->name, cpu_dai->name);
175 goto config_err;
176 }
177 if (!runtime->hw.formats) {
178 printk(KERN_ERR "asoc: %s <-> %s No matching formats\n",
179 codec_dai->name, cpu_dai->name);
180 goto config_err;
181 }
182 if (!runtime->hw.channels_min || !runtime->hw.channels_max ||
183 runtime->hw.channels_min > runtime->hw.channels_max) {
184 printk(KERN_ERR "asoc: %s <-> %s No matching channels\n",
185 codec_dai->name, cpu_dai->name);
186 goto config_err;
187 }
188
189 /* Symmetry only applies if we've already got an active stream. */
190 if (cpu_dai->active || codec_dai->active) {
191 ret = soc_pcm_apply_symmetry(substream);
192 if (ret != 0)
193 goto config_err;
194 }
195
196 pr_debug("asoc: %s <-> %s info:\n",
197 codec_dai->name, cpu_dai->name);
198 pr_debug("asoc: rate mask 0x%x\n", runtime->hw.rates);
199 pr_debug("asoc: min ch %d max ch %d\n", runtime->hw.channels_min,
200 runtime->hw.channels_max);
201 pr_debug("asoc: min rate %d max rate %d\n", runtime->hw.rate_min,
202 runtime->hw.rate_max);
203
204 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
205 cpu_dai->playback_active++;
206 codec_dai->playback_active++;
207 } else {
208 cpu_dai->capture_active++;
209 codec_dai->capture_active++;
210 }
211 cpu_dai->active++;
212 codec_dai->active++;
213 rtd->codec->active++;
214 mutex_unlock(&rtd->pcm_mutex);
215 return 0;
216
217 config_err:
218 if (rtd->dai_link->ops && rtd->dai_link->ops->shutdown)
219 rtd->dai_link->ops->shutdown(substream);
220
221 machine_err:
222 if (codec_dai->driver->ops->shutdown)
223 codec_dai->driver->ops->shutdown(substream, codec_dai);
224
225 codec_dai_err:
226 if (platform->driver->ops && platform->driver->ops->close)
227 platform->driver->ops->close(substream);
228
229 platform_err:
230 if (cpu_dai->driver->ops->shutdown)
231 cpu_dai->driver->ops->shutdown(substream, cpu_dai);
232 out:
233 mutex_unlock(&rtd->pcm_mutex);
234 return ret;
235 }
236
237 /*
238 * Power down the audio subsystem pmdown_time msecs after close is called.
239 * This is to ensure there are no pops or clicks in between any music tracks
240 * due to DAPM power cycling.
241 */
242 static void close_delayed_work(struct work_struct *work)
243 {
244 struct snd_soc_pcm_runtime *rtd =
245 container_of(work, struct snd_soc_pcm_runtime, delayed_work.work);
246 struct snd_soc_dai *codec_dai = rtd->codec_dai;
247
248 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
249
250 pr_debug("pop wq checking: %s status: %s waiting: %s\n",
251 codec_dai->driver->playback.stream_name,
252 codec_dai->playback_active ? "active" : "inactive",
253 codec_dai->pop_wait ? "yes" : "no");
254
255 /* are we waiting on this codec DAI stream */
256 if (codec_dai->pop_wait == 1) {
257 codec_dai->pop_wait = 0;
258 snd_soc_dapm_stream_event(rtd,
259 codec_dai->driver->playback.stream_name,
260 SND_SOC_DAPM_STREAM_STOP);
261 }
262
263 mutex_unlock(&rtd->pcm_mutex);
264 }
265
266 /*
267 * Called by ALSA when a PCM substream is closed. Private data can be
268 * freed here. The cpu DAI, codec DAI, machine and platform are also
269 * shutdown.
270 */
271 static int soc_pcm_close(struct snd_pcm_substream *substream)
272 {
273 struct snd_soc_pcm_runtime *rtd = substream->private_data;
274 struct snd_soc_platform *platform = rtd->platform;
275 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
276 struct snd_soc_dai *codec_dai = rtd->codec_dai;
277 struct snd_soc_codec *codec = rtd->codec;
278
279 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
280
281 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
282 cpu_dai->playback_active--;
283 codec_dai->playback_active--;
284 } else {
285 cpu_dai->capture_active--;
286 codec_dai->capture_active--;
287 }
288
289 cpu_dai->active--;
290 codec_dai->active--;
291 codec->active--;
292
293 /* Muting the DAC suppresses artifacts caused during digital
294 * shutdown, for example from stopping clocks.
295 */
296 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
297 snd_soc_dai_digital_mute(codec_dai, 1);
298
299 if (cpu_dai->driver->ops->shutdown)
300 cpu_dai->driver->ops->shutdown(substream, cpu_dai);
301
302 if (codec_dai->driver->ops->shutdown)
303 codec_dai->driver->ops->shutdown(substream, codec_dai);
304
305 if (rtd->dai_link->ops && rtd->dai_link->ops->shutdown)
306 rtd->dai_link->ops->shutdown(substream);
307
308 if (platform->driver->ops && platform->driver->ops->close)
309 platform->driver->ops->close(substream);
310 cpu_dai->runtime = NULL;
311
312 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
313 /* start delayed pop wq here for playback streams */
314 codec_dai->pop_wait = 1;
315 schedule_delayed_work(&rtd->delayed_work,
316 msecs_to_jiffies(rtd->pmdown_time));
317 } else {
318 /* capture streams can be powered down now */
319 snd_soc_dapm_stream_event(rtd,
320 codec_dai->driver->capture.stream_name,
321 SND_SOC_DAPM_STREAM_STOP);
322 }
323
324 mutex_unlock(&rtd->pcm_mutex);
325 return 0;
326 }
327
328 /*
329 * Called by ALSA when the PCM substream is prepared, can set format, sample
330 * rate, etc. This function is non atomic and can be called multiple times,
331 * it can refer to the runtime info.
332 */
333 static int soc_pcm_prepare(struct snd_pcm_substream *substream)
334 {
335 struct snd_soc_pcm_runtime *rtd = substream->private_data;
336 struct snd_soc_platform *platform = rtd->platform;
337 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
338 struct snd_soc_dai *codec_dai = rtd->codec_dai;
339 int ret = 0;
340
341 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
342
343 if (rtd->dai_link->ops && rtd->dai_link->ops->prepare) {
344 ret = rtd->dai_link->ops->prepare(substream);
345 if (ret < 0) {
346 printk(KERN_ERR "asoc: machine prepare error\n");
347 goto out;
348 }
349 }
350
351 if (platform->driver->ops && platform->driver->ops->prepare) {
352 ret = platform->driver->ops->prepare(substream);
353 if (ret < 0) {
354 printk(KERN_ERR "asoc: platform prepare error\n");
355 goto out;
356 }
357 }
358
359 if (codec_dai->driver->ops->prepare) {
360 ret = codec_dai->driver->ops->prepare(substream, codec_dai);
361 if (ret < 0) {
362 printk(KERN_ERR "asoc: codec DAI prepare error\n");
363 goto out;
364 }
365 }
366
367 if (cpu_dai->driver->ops->prepare) {
368 ret = cpu_dai->driver->ops->prepare(substream, cpu_dai);
369 if (ret < 0) {
370 printk(KERN_ERR "asoc: cpu DAI prepare error\n");
371 goto out;
372 }
373 }
374
375 /* cancel any delayed stream shutdown that is pending */
376 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
377 codec_dai->pop_wait) {
378 codec_dai->pop_wait = 0;
379 cancel_delayed_work(&rtd->delayed_work);
380 }
381
382 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
383 snd_soc_dapm_stream_event(rtd,
384 codec_dai->driver->playback.stream_name,
385 SND_SOC_DAPM_STREAM_START);
386 else
387 snd_soc_dapm_stream_event(rtd,
388 codec_dai->driver->capture.stream_name,
389 SND_SOC_DAPM_STREAM_START);
390
391 snd_soc_dai_digital_mute(codec_dai, 0);
392
393 out:
394 mutex_unlock(&rtd->pcm_mutex);
395 return ret;
396 }
397
398 /*
399 * Called by ALSA when the hardware params are set by application. This
400 * function can also be called multiple times and can allocate buffers
401 * (using snd_pcm_lib_* ). It's non-atomic.
402 */
403 static int soc_pcm_hw_params(struct snd_pcm_substream *substream,
404 struct snd_pcm_hw_params *params)
405 {
406 struct snd_soc_pcm_runtime *rtd = substream->private_data;
407 struct snd_soc_platform *platform = rtd->platform;
408 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
409 struct snd_soc_dai *codec_dai = rtd->codec_dai;
410 int ret = 0;
411
412 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
413
414 if (rtd->dai_link->ops && rtd->dai_link->ops->hw_params) {
415 ret = rtd->dai_link->ops->hw_params(substream, params);
416 if (ret < 0) {
417 printk(KERN_ERR "asoc: machine hw_params failed\n");
418 goto out;
419 }
420 }
421
422 if (codec_dai->driver->ops->hw_params) {
423 ret = codec_dai->driver->ops->hw_params(substream, params, codec_dai);
424 if (ret < 0) {
425 printk(KERN_ERR "asoc: can't set codec %s hw params\n",
426 codec_dai->name);
427 goto codec_err;
428 }
429 }
430
431 if (cpu_dai->driver->ops->hw_params) {
432 ret = cpu_dai->driver->ops->hw_params(substream, params, cpu_dai);
433 if (ret < 0) {
434 printk(KERN_ERR "asoc: interface %s hw params failed\n",
435 cpu_dai->name);
436 goto interface_err;
437 }
438 }
439
440 if (platform->driver->ops && platform->driver->ops->hw_params) {
441 ret = platform->driver->ops->hw_params(substream, params);
442 if (ret < 0) {
443 printk(KERN_ERR "asoc: platform %s hw params failed\n",
444 platform->name);
445 goto platform_err;
446 }
447 }
448
449 rtd->rate = params_rate(params);
450
451 out:
452 mutex_unlock(&rtd->pcm_mutex);
453 return ret;
454
455 platform_err:
456 if (cpu_dai->driver->ops->hw_free)
457 cpu_dai->driver->ops->hw_free(substream, cpu_dai);
458
459 interface_err:
460 if (codec_dai->driver->ops->hw_free)
461 codec_dai->driver->ops->hw_free(substream, codec_dai);
462
463 codec_err:
464 if (rtd->dai_link->ops && rtd->dai_link->ops->hw_free)
465 rtd->dai_link->ops->hw_free(substream);
466
467 mutex_unlock(&rtd->pcm_mutex);
468 return ret;
469 }
470
471 /*
472 * Frees resources allocated by hw_params, can be called multiple times
473 */
474 static int soc_pcm_hw_free(struct snd_pcm_substream *substream)
475 {
476 struct snd_soc_pcm_runtime *rtd = substream->private_data;
477 struct snd_soc_platform *platform = rtd->platform;
478 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
479 struct snd_soc_dai *codec_dai = rtd->codec_dai;
480 struct snd_soc_codec *codec = rtd->codec;
481
482 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
483
484 /* apply codec digital mute */
485 if (!codec->active)
486 snd_soc_dai_digital_mute(codec_dai, 1);
487
488 /* free any machine hw params */
489 if (rtd->dai_link->ops && rtd->dai_link->ops->hw_free)
490 rtd->dai_link->ops->hw_free(substream);
491
492 /* free any DMA resources */
493 if (platform->driver->ops && platform->driver->ops->hw_free)
494 platform->driver->ops->hw_free(substream);
495
496 /* now free hw params for the DAIs */
497 if (codec_dai->driver->ops->hw_free)
498 codec_dai->driver->ops->hw_free(substream, codec_dai);
499
500 if (cpu_dai->driver->ops->hw_free)
501 cpu_dai->driver->ops->hw_free(substream, cpu_dai);
502
503 mutex_unlock(&rtd->pcm_mutex);
504 return 0;
505 }
506
507 static int soc_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
508 {
509 struct snd_soc_pcm_runtime *rtd = substream->private_data;
510 struct snd_soc_platform *platform = rtd->platform;
511 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
512 struct snd_soc_dai *codec_dai = rtd->codec_dai;
513 int ret;
514
515 if (codec_dai->driver->ops->trigger) {
516 ret = codec_dai->driver->ops->trigger(substream, cmd, codec_dai);
517 if (ret < 0)
518 return ret;
519 }
520
521 if (platform->driver->ops && platform->driver->ops->trigger) {
522 ret = platform->driver->ops->trigger(substream, cmd);
523 if (ret < 0)
524 return ret;
525 }
526
527 if (cpu_dai->driver->ops->trigger) {
528 ret = cpu_dai->driver->ops->trigger(substream, cmd, cpu_dai);
529 if (ret < 0)
530 return ret;
531 }
532 return 0;
533 }
534
535 /*
536 * soc level wrapper for pointer callback
537 * If cpu_dai, codec_dai, platform driver has the delay callback, than
538 * the runtime->delay will be updated accordingly.
539 */
540 static snd_pcm_uframes_t soc_pcm_pointer(struct snd_pcm_substream *substream)
541 {
542 struct snd_soc_pcm_runtime *rtd = substream->private_data;
543 struct snd_soc_platform *platform = rtd->platform;
544 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
545 struct snd_soc_dai *codec_dai = rtd->codec_dai;
546 struct snd_pcm_runtime *runtime = substream->runtime;
547 snd_pcm_uframes_t offset = 0;
548 snd_pcm_sframes_t delay = 0;
549
550 if (platform->driver->ops && platform->driver->ops->pointer)
551 offset = platform->driver->ops->pointer(substream);
552
553 if (cpu_dai->driver->ops->delay)
554 delay += cpu_dai->driver->ops->delay(substream, cpu_dai);
555
556 if (codec_dai->driver->ops->delay)
557 delay += codec_dai->driver->ops->delay(substream, codec_dai);
558
559 if (platform->driver->delay)
560 delay += platform->driver->delay(substream, codec_dai);
561
562 runtime->delay = delay;
563
564 return offset;
565 }
566
567 /* ASoC PCM operations */
568 static struct snd_pcm_ops soc_pcm_ops = {
569 .open = soc_pcm_open,
570 .close = soc_pcm_close,
571 .hw_params = soc_pcm_hw_params,
572 .hw_free = soc_pcm_hw_free,
573 .prepare = soc_pcm_prepare,
574 .trigger = soc_pcm_trigger,
575 .pointer = soc_pcm_pointer,
576 };
577
578 /* create a new pcm */
579 int soc_new_pcm(struct snd_soc_pcm_runtime *rtd, int num)
580 {
581 struct snd_soc_codec *codec = rtd->codec;
582 struct snd_soc_platform *platform = rtd->platform;
583 struct snd_soc_dai *codec_dai = rtd->codec_dai;
584 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
585 struct snd_pcm *pcm;
586 char new_name[64];
587 int ret = 0, playback = 0, capture = 0;
588
589 /* check client and interface hw capabilities */
590 snprintf(new_name, sizeof(new_name), "%s %s-%d",
591 rtd->dai_link->stream_name, codec_dai->name, num);
592
593 if (codec_dai->driver->playback.channels_min)
594 playback = 1;
595 if (codec_dai->driver->capture.channels_min)
596 capture = 1;
597
598 dev_dbg(rtd->card->dev, "registered pcm #%d %s\n",num,new_name);
599 ret = snd_pcm_new(rtd->card->snd_card, new_name,
600 num, playback, capture, &pcm);
601 if (ret < 0) {
602 printk(KERN_ERR "asoc: can't create pcm for codec %s\n", codec->name);
603 return ret;
604 }
605
606 /* DAPM dai link stream work */
607 INIT_DELAYED_WORK(&rtd->delayed_work, close_delayed_work);
608
609 rtd->pcm = pcm;
610 pcm->private_data = rtd;
611 if (platform->driver->ops) {
612 soc_pcm_ops.mmap = platform->driver->ops->mmap;
613 soc_pcm_ops.pointer = platform->driver->ops->pointer;
614 soc_pcm_ops.ioctl = platform->driver->ops->ioctl;
615 soc_pcm_ops.copy = platform->driver->ops->copy;
616 soc_pcm_ops.silence = platform->driver->ops->silence;
617 soc_pcm_ops.ack = platform->driver->ops->ack;
618 soc_pcm_ops.page = platform->driver->ops->page;
619 }
620
621 if (playback)
622 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &soc_pcm_ops);
623
624 if (capture)
625 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &soc_pcm_ops);
626
627 if (platform->driver->pcm_new) {
628 ret = platform->driver->pcm_new(rtd);
629 if (ret < 0) {
630 pr_err("asoc: platform pcm constructor failed\n");
631 return ret;
632 }
633 }
634
635 pcm->private_free = platform->driver->pcm_free;
636 printk(KERN_INFO "asoc: %s <-> %s mapping ok\n", codec_dai->name,
637 cpu_dai->name);
638 return ret;
639 }
linux-next