2 * soc-core.c -- ALSA SoC Audio Layer
4 * Copyright 2005 Wolfson Microelectronics PLC.
5 * Copyright 2005 Openedhand Ltd.
7 * Author: Liam Girdwood <lrg@slimlogic.co.uk>
8 * with code, comments and ideas from :-
9 * Richard Purdie <richard@openedhand.com>
11 * This program is free software; you can redistribute it and/or modify it
12 * under the terms of the GNU General Public License as published by the
13 * Free Software Foundation; either version 2 of the License, or (at your
14 * option) any later version.
17 * o Add hw rules to enforce rates, etc.
18 * o More testing with other codecs/machines.
19 * o Add more codecs and platforms to ensure good API coverage.
20 * o Support TDM on PCM and I2S
23 #include <linux/module.h>
24 #include <linux/moduleparam.h>
25 #include <linux/init.h>
26 #include <linux/delay.h>
28 #include <linux/bitops.h>
29 #include <linux/debugfs.h>
30 #include <linux/platform_device.h>
31 #include <sound/core.h>
32 #include <sound/pcm.h>
33 #include <sound/pcm_params.h>
34 #include <sound/soc.h>
35 #include <sound/soc-dapm.h>
36 #include <sound/initval.h>
38 static DEFINE_MUTEX(pcm_mutex);
39 static DEFINE_MUTEX(io_mutex);
40 static DECLARE_WAIT_QUEUE_HEAD(soc_pm_waitq);
42 #ifdef CONFIG_DEBUG_FS
43 static struct dentry *debugfs_root;
46 static DEFINE_MUTEX(client_mutex);
47 static LIST_HEAD(card_list);
48 static LIST_HEAD(dai_list);
49 static LIST_HEAD(platform_list);
50 static LIST_HEAD(codec_list);
52 static int snd_soc_register_card(struct snd_soc_card *card);
53 static int snd_soc_unregister_card(struct snd_soc_card *card);
56 * This is a timeout to do a DAPM powerdown after a stream is closed().
57 * It can be used to eliminate pops between different playback streams, e.g.
58 * between two audio tracks.
60 static int pmdown_time = 5000;
61 module_param(pmdown_time, int, 0);
62 MODULE_PARM_DESC(pmdown_time, "DAPM stream powerdown time (msecs)");
65 * This function forces any delayed work to be queued and run.
67 static int run_delayed_work(struct delayed_work *dwork)
71 /* cancel any work waiting to be queued. */
72 ret = cancel_delayed_work(dwork);
74 /* if there was any work waiting then we run it now and
75 * wait for it's completion */
77 schedule_delayed_work(dwork, 0);
78 flush_scheduled_work();
83 #ifdef CONFIG_SND_SOC_AC97_BUS
84 /* unregister ac97 codec */
85 static int soc_ac97_dev_unregister(struct snd_soc_codec *codec)
87 if (codec->ac97->dev.bus)
88 device_unregister(&codec->ac97->dev);
92 /* stop no dev release warning */
93 static void soc_ac97_device_release(struct device *dev){}
95 /* register ac97 codec to bus */
96 static int soc_ac97_dev_register(struct snd_soc_codec *codec)
100 codec->ac97->dev.bus = &ac97_bus_type;
101 codec->ac97->dev.parent = codec->card->dev;
102 codec->ac97->dev.release = soc_ac97_device_release;
104 dev_set_name(&codec->ac97->dev, "%d-%d:%s",
105 codec->card->number, 0, codec->name);
106 err = device_register(&codec->ac97->dev);
108 snd_printk(KERN_ERR "Can't register ac97 bus\n");
109 codec->ac97->dev.bus = NULL;
116 static int soc_pcm_apply_symmetry(struct snd_pcm_substream *substream)
118 struct snd_soc_pcm_runtime *rtd = substream->private_data;
119 struct snd_soc_device *socdev = rtd->socdev;
120 struct snd_soc_card *card = socdev->card;
121 struct snd_soc_dai_link *machine = rtd->dai;
122 struct snd_soc_dai *cpu_dai = machine->cpu_dai;
123 struct snd_soc_dai *codec_dai = machine->codec_dai;
126 if (codec_dai->symmetric_rates || cpu_dai->symmetric_rates ||
127 machine->symmetric_rates) {
128 dev_dbg(card->dev, "Symmetry forces %dHz rate\n",
131 ret = snd_pcm_hw_constraint_minmax(substream->runtime,
132 SNDRV_PCM_HW_PARAM_RATE,
137 "Unable to apply rate symmetry constraint: %d\n", ret);
146 * Called by ALSA when a PCM substream is opened, the runtime->hw record is
147 * then initialized and any private data can be allocated. This also calls
148 * startup for the cpu DAI, platform, machine and codec DAI.
150 static int soc_pcm_open(struct snd_pcm_substream *substream)
152 struct snd_soc_pcm_runtime *rtd = substream->private_data;
153 struct snd_soc_device *socdev = rtd->socdev;
154 struct snd_soc_card *card = socdev->card;
155 struct snd_pcm_runtime *runtime = substream->runtime;
156 struct snd_soc_dai_link *machine = rtd->dai;
157 struct snd_soc_platform *platform = card->platform;
158 struct snd_soc_dai *cpu_dai = machine->cpu_dai;
159 struct snd_soc_dai *codec_dai = machine->codec_dai;
162 mutex_lock(&pcm_mutex);
164 /* startup the audio subsystem */
165 if (cpu_dai->ops->startup) {
166 ret = cpu_dai->ops->startup(substream, cpu_dai);
168 printk(KERN_ERR "asoc: can't open interface %s\n",
174 if (platform->pcm_ops->open) {
175 ret = platform->pcm_ops->open(substream);
177 printk(KERN_ERR "asoc: can't open platform %s\n", platform->name);
182 if (codec_dai->ops->startup) {
183 ret = codec_dai->ops->startup(substream, codec_dai);
185 printk(KERN_ERR "asoc: can't open codec %s\n",
191 if (machine->ops && machine->ops->startup) {
192 ret = machine->ops->startup(substream);
194 printk(KERN_ERR "asoc: %s startup failed\n", machine->name);
199 /* Check that the codec and cpu DAI's are compatible */
200 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
201 runtime->hw.rate_min =
202 max(codec_dai->playback.rate_min,
203 cpu_dai->playback.rate_min);
204 runtime->hw.rate_max =
205 min(codec_dai->playback.rate_max,
206 cpu_dai->playback.rate_max);
207 runtime->hw.channels_min =
208 max(codec_dai->playback.channels_min,
209 cpu_dai->playback.channels_min);
210 runtime->hw.channels_max =
211 min(codec_dai->playback.channels_max,
212 cpu_dai->playback.channels_max);
213 runtime->hw.formats =
214 codec_dai->playback.formats & cpu_dai->playback.formats;
216 codec_dai->playback.rates & cpu_dai->playback.rates;
218 runtime->hw.rate_min =
219 max(codec_dai->capture.rate_min,
220 cpu_dai->capture.rate_min);
221 runtime->hw.rate_max =
222 min(codec_dai->capture.rate_max,
223 cpu_dai->capture.rate_max);
224 runtime->hw.channels_min =
225 max(codec_dai->capture.channels_min,
226 cpu_dai->capture.channels_min);
227 runtime->hw.channels_max =
228 min(codec_dai->capture.channels_max,
229 cpu_dai->capture.channels_max);
230 runtime->hw.formats =
231 codec_dai->capture.formats & cpu_dai->capture.formats;
233 codec_dai->capture.rates & cpu_dai->capture.rates;
236 snd_pcm_limit_hw_rates(runtime);
237 if (!runtime->hw.rates) {
238 printk(KERN_ERR "asoc: %s <-> %s No matching rates\n",
239 codec_dai->name, cpu_dai->name);
242 if (!runtime->hw.formats) {
243 printk(KERN_ERR "asoc: %s <-> %s No matching formats\n",
244 codec_dai->name, cpu_dai->name);
247 if (!runtime->hw.channels_min || !runtime->hw.channels_max) {
248 printk(KERN_ERR "asoc: %s <-> %s No matching channels\n",
249 codec_dai->name, cpu_dai->name);
253 /* Symmetry only applies if we've already got an active stream. */
254 if (cpu_dai->active || codec_dai->active) {
255 ret = soc_pcm_apply_symmetry(substream);
260 pr_debug("asoc: %s <-> %s info:\n", codec_dai->name, cpu_dai->name);
261 pr_debug("asoc: rate mask 0x%x\n", runtime->hw.rates);
262 pr_debug("asoc: min ch %d max ch %d\n", runtime->hw.channels_min,
263 runtime->hw.channels_max);
264 pr_debug("asoc: min rate %d max rate %d\n", runtime->hw.rate_min,
265 runtime->hw.rate_max);
267 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
268 cpu_dai->playback.active = codec_dai->playback.active = 1;
270 cpu_dai->capture.active = codec_dai->capture.active = 1;
271 cpu_dai->active = codec_dai->active = 1;
272 cpu_dai->runtime = runtime;
273 card->codec->active++;
274 mutex_unlock(&pcm_mutex);
278 if (machine->ops && machine->ops->shutdown)
279 machine->ops->shutdown(substream);
282 if (platform->pcm_ops->close)
283 platform->pcm_ops->close(substream);
286 if (cpu_dai->ops->shutdown)
287 cpu_dai->ops->shutdown(substream, cpu_dai);
289 mutex_unlock(&pcm_mutex);
294 * Power down the audio subsystem pmdown_time msecs after close is called.
295 * This is to ensure there are no pops or clicks in between any music tracks
296 * due to DAPM power cycling.
298 static void close_delayed_work(struct work_struct *work)
300 struct snd_soc_card *card = container_of(work, struct snd_soc_card,
302 struct snd_soc_device *socdev = card->socdev;
303 struct snd_soc_codec *codec = card->codec;
304 struct snd_soc_dai *codec_dai;
307 mutex_lock(&pcm_mutex);
308 for (i = 0; i < codec->num_dai; i++) {
309 codec_dai = &codec->dai[i];
311 pr_debug("pop wq checking: %s status: %s waiting: %s\n",
312 codec_dai->playback.stream_name,
313 codec_dai->playback.active ? "active" : "inactive",
314 codec_dai->pop_wait ? "yes" : "no");
316 /* are we waiting on this codec DAI stream */
317 if (codec_dai->pop_wait == 1) {
319 /* Reduce power if no longer active */
320 if (codec->active == 0) {
321 pr_debug("pop wq D1 %s %s\n", codec->name,
322 codec_dai->playback.stream_name);
323 snd_soc_dapm_set_bias_level(socdev,
324 SND_SOC_BIAS_PREPARE);
327 codec_dai->pop_wait = 0;
328 snd_soc_dapm_stream_event(codec,
329 codec_dai->playback.stream_name,
330 SND_SOC_DAPM_STREAM_STOP);
332 /* Fall into standby if no longer active */
333 if (codec->active == 0) {
334 pr_debug("pop wq D3 %s %s\n", codec->name,
335 codec_dai->playback.stream_name);
336 snd_soc_dapm_set_bias_level(socdev,
337 SND_SOC_BIAS_STANDBY);
341 mutex_unlock(&pcm_mutex);
345 * Called by ALSA when a PCM substream is closed. Private data can be
346 * freed here. The cpu DAI, codec DAI, machine and platform are also
349 static int soc_codec_close(struct snd_pcm_substream *substream)
351 struct snd_soc_pcm_runtime *rtd = substream->private_data;
352 struct snd_soc_device *socdev = rtd->socdev;
353 struct snd_soc_card *card = socdev->card;
354 struct snd_soc_dai_link *machine = rtd->dai;
355 struct snd_soc_platform *platform = card->platform;
356 struct snd_soc_dai *cpu_dai = machine->cpu_dai;
357 struct snd_soc_dai *codec_dai = machine->codec_dai;
358 struct snd_soc_codec *codec = card->codec;
360 mutex_lock(&pcm_mutex);
362 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
363 cpu_dai->playback.active = codec_dai->playback.active = 0;
365 cpu_dai->capture.active = codec_dai->capture.active = 0;
367 if (codec_dai->playback.active == 0 &&
368 codec_dai->capture.active == 0) {
369 cpu_dai->active = codec_dai->active = 0;
373 /* Muting the DAC suppresses artifacts caused during digital
374 * shutdown, for example from stopping clocks.
376 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
377 snd_soc_dai_digital_mute(codec_dai, 1);
379 if (cpu_dai->ops->shutdown)
380 cpu_dai->ops->shutdown(substream, cpu_dai);
382 if (codec_dai->ops->shutdown)
383 codec_dai->ops->shutdown(substream, codec_dai);
385 if (machine->ops && machine->ops->shutdown)
386 machine->ops->shutdown(substream);
388 if (platform->pcm_ops->close)
389 platform->pcm_ops->close(substream);
390 cpu_dai->runtime = NULL;
392 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
393 /* start delayed pop wq here for playback streams */
394 codec_dai->pop_wait = 1;
395 schedule_delayed_work(&card->delayed_work,
396 msecs_to_jiffies(pmdown_time));
398 /* capture streams can be powered down now */
399 snd_soc_dapm_stream_event(codec,
400 codec_dai->capture.stream_name,
401 SND_SOC_DAPM_STREAM_STOP);
403 if (codec->active == 0 && codec_dai->pop_wait == 0)
404 snd_soc_dapm_set_bias_level(socdev,
405 SND_SOC_BIAS_STANDBY);
408 mutex_unlock(&pcm_mutex);
413 * Called by ALSA when the PCM substream is prepared, can set format, sample
414 * rate, etc. This function is non atomic and can be called multiple times,
415 * it can refer to the runtime info.
417 static int soc_pcm_prepare(struct snd_pcm_substream *substream)
419 struct snd_soc_pcm_runtime *rtd = substream->private_data;
420 struct snd_soc_device *socdev = rtd->socdev;
421 struct snd_soc_card *card = socdev->card;
422 struct snd_soc_dai_link *machine = rtd->dai;
423 struct snd_soc_platform *platform = card->platform;
424 struct snd_soc_dai *cpu_dai = machine->cpu_dai;
425 struct snd_soc_dai *codec_dai = machine->codec_dai;
426 struct snd_soc_codec *codec = card->codec;
429 mutex_lock(&pcm_mutex);
431 if (machine->ops && machine->ops->prepare) {
432 ret = machine->ops->prepare(substream);
434 printk(KERN_ERR "asoc: machine prepare error\n");
439 if (platform->pcm_ops->prepare) {
440 ret = platform->pcm_ops->prepare(substream);
442 printk(KERN_ERR "asoc: platform prepare error\n");
447 if (codec_dai->ops->prepare) {
448 ret = codec_dai->ops->prepare(substream, codec_dai);
450 printk(KERN_ERR "asoc: codec DAI prepare error\n");
455 if (cpu_dai->ops->prepare) {
456 ret = cpu_dai->ops->prepare(substream, cpu_dai);
458 printk(KERN_ERR "asoc: cpu DAI prepare error\n");
463 /* cancel any delayed stream shutdown that is pending */
464 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
465 codec_dai->pop_wait) {
466 codec_dai->pop_wait = 0;
467 cancel_delayed_work(&card->delayed_work);
470 /* do we need to power up codec */
471 if (codec->bias_level != SND_SOC_BIAS_ON) {
472 snd_soc_dapm_set_bias_level(socdev,
473 SND_SOC_BIAS_PREPARE);
475 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
476 snd_soc_dapm_stream_event(codec,
477 codec_dai->playback.stream_name,
478 SND_SOC_DAPM_STREAM_START);
480 snd_soc_dapm_stream_event(codec,
481 codec_dai->capture.stream_name,
482 SND_SOC_DAPM_STREAM_START);
484 snd_soc_dapm_set_bias_level(socdev, SND_SOC_BIAS_ON);
485 snd_soc_dai_digital_mute(codec_dai, 0);
488 /* codec already powered - power on widgets */
489 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
490 snd_soc_dapm_stream_event(codec,
491 codec_dai->playback.stream_name,
492 SND_SOC_DAPM_STREAM_START);
494 snd_soc_dapm_stream_event(codec,
495 codec_dai->capture.stream_name,
496 SND_SOC_DAPM_STREAM_START);
498 snd_soc_dai_digital_mute(codec_dai, 0);
502 mutex_unlock(&pcm_mutex);
507 * Called by ALSA when the hardware params are set by application. This
508 * function can also be called multiple times and can allocate buffers
509 * (using snd_pcm_lib_* ). It's non-atomic.
511 static int soc_pcm_hw_params(struct snd_pcm_substream *substream,
512 struct snd_pcm_hw_params *params)
514 struct snd_soc_pcm_runtime *rtd = substream->private_data;
515 struct snd_soc_device *socdev = rtd->socdev;
516 struct snd_soc_dai_link *machine = rtd->dai;
517 struct snd_soc_card *card = socdev->card;
518 struct snd_soc_platform *platform = card->platform;
519 struct snd_soc_dai *cpu_dai = machine->cpu_dai;
520 struct snd_soc_dai *codec_dai = machine->codec_dai;
523 mutex_lock(&pcm_mutex);
525 if (machine->ops && machine->ops->hw_params) {
526 ret = machine->ops->hw_params(substream, params);
528 printk(KERN_ERR "asoc: machine hw_params failed\n");
533 if (codec_dai->ops->hw_params) {
534 ret = codec_dai->ops->hw_params(substream, params, codec_dai);
536 printk(KERN_ERR "asoc: can't set codec %s hw params\n",
542 if (cpu_dai->ops->hw_params) {
543 ret = cpu_dai->ops->hw_params(substream, params, cpu_dai);
545 printk(KERN_ERR "asoc: interface %s hw params failed\n",
551 if (platform->pcm_ops->hw_params) {
552 ret = platform->pcm_ops->hw_params(substream, params);
554 printk(KERN_ERR "asoc: platform %s hw params failed\n",
560 machine->rate = params_rate(params);
563 mutex_unlock(&pcm_mutex);
567 if (cpu_dai->ops->hw_free)
568 cpu_dai->ops->hw_free(substream, cpu_dai);
571 if (codec_dai->ops->hw_free)
572 codec_dai->ops->hw_free(substream, codec_dai);
575 if (machine->ops && machine->ops->hw_free)
576 machine->ops->hw_free(substream);
578 mutex_unlock(&pcm_mutex);
583 * Free's resources allocated by hw_params, can be called multiple times
585 static int soc_pcm_hw_free(struct snd_pcm_substream *substream)
587 struct snd_soc_pcm_runtime *rtd = substream->private_data;
588 struct snd_soc_device *socdev = rtd->socdev;
589 struct snd_soc_dai_link *machine = rtd->dai;
590 struct snd_soc_card *card = socdev->card;
591 struct snd_soc_platform *platform = card->platform;
592 struct snd_soc_dai *cpu_dai = machine->cpu_dai;
593 struct snd_soc_dai *codec_dai = machine->codec_dai;
594 struct snd_soc_codec *codec = card->codec;
596 mutex_lock(&pcm_mutex);
598 /* apply codec digital mute */
600 snd_soc_dai_digital_mute(codec_dai, 1);
602 /* free any machine hw params */
603 if (machine->ops && machine->ops->hw_free)
604 machine->ops->hw_free(substream);
606 /* free any DMA resources */
607 if (platform->pcm_ops->hw_free)
608 platform->pcm_ops->hw_free(substream);
610 /* now free hw params for the DAI's */
611 if (codec_dai->ops->hw_free)
612 codec_dai->ops->hw_free(substream, codec_dai);
614 if (cpu_dai->ops->hw_free)
615 cpu_dai->ops->hw_free(substream, cpu_dai);
617 mutex_unlock(&pcm_mutex);
621 static int soc_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
623 struct snd_soc_pcm_runtime *rtd = substream->private_data;
624 struct snd_soc_device *socdev = rtd->socdev;
625 struct snd_soc_card *card= socdev->card;
626 struct snd_soc_dai_link *machine = rtd->dai;
627 struct snd_soc_platform *platform = card->platform;
628 struct snd_soc_dai *cpu_dai = machine->cpu_dai;
629 struct snd_soc_dai *codec_dai = machine->codec_dai;
632 if (codec_dai->ops->trigger) {
633 ret = codec_dai->ops->trigger(substream, cmd, codec_dai);
638 if (platform->pcm_ops->trigger) {
639 ret = platform->pcm_ops->trigger(substream, cmd);
644 if (cpu_dai->ops->trigger) {
645 ret = cpu_dai->ops->trigger(substream, cmd, cpu_dai);
652 /* ASoC PCM operations */
653 static struct snd_pcm_ops soc_pcm_ops = {
654 .open = soc_pcm_open,
655 .close = soc_codec_close,
656 .hw_params = soc_pcm_hw_params,
657 .hw_free = soc_pcm_hw_free,
658 .prepare = soc_pcm_prepare,
659 .trigger = soc_pcm_trigger,
663 /* powers down audio subsystem for suspend */
664 static int soc_suspend(struct platform_device *pdev, pm_message_t state)
666 struct snd_soc_device *socdev = platform_get_drvdata(pdev);
667 struct snd_soc_card *card = socdev->card;
668 struct snd_soc_platform *platform = card->platform;
669 struct snd_soc_codec_device *codec_dev = socdev->codec_dev;
670 struct snd_soc_codec *codec = card->codec;
673 /* Due to the resume being scheduled into a workqueue we could
674 * suspend before that's finished - wait for it to complete.
676 snd_power_lock(codec->card);
677 snd_power_wait(codec->card, SNDRV_CTL_POWER_D0);
678 snd_power_unlock(codec->card);
680 /* we're going to block userspace touching us until resume completes */
681 snd_power_change_state(codec->card, SNDRV_CTL_POWER_D3hot);
683 /* mute any active DAC's */
684 for (i = 0; i < card->num_links; i++) {
685 struct snd_soc_dai *dai = card->dai_link[i].codec_dai;
686 if (dai->ops->digital_mute && dai->playback.active)
687 dai->ops->digital_mute(dai, 1);
690 /* suspend all pcms */
691 for (i = 0; i < card->num_links; i++)
692 snd_pcm_suspend_all(card->dai_link[i].pcm);
694 if (card->suspend_pre)
695 card->suspend_pre(pdev, state);
697 for (i = 0; i < card->num_links; i++) {
698 struct snd_soc_dai *cpu_dai = card->dai_link[i].cpu_dai;
699 if (cpu_dai->suspend && !cpu_dai->ac97_control)
700 cpu_dai->suspend(cpu_dai);
701 if (platform->suspend)
702 platform->suspend(cpu_dai);
705 /* close any waiting streams and save state */
706 run_delayed_work(&card->delayed_work);
707 codec->suspend_bias_level = codec->bias_level;
709 for (i = 0; i < codec->num_dai; i++) {
710 char *stream = codec->dai[i].playback.stream_name;
712 snd_soc_dapm_stream_event(codec, stream,
713 SND_SOC_DAPM_STREAM_SUSPEND);
714 stream = codec->dai[i].capture.stream_name;
716 snd_soc_dapm_stream_event(codec, stream,
717 SND_SOC_DAPM_STREAM_SUSPEND);
720 if (codec_dev->suspend)
721 codec_dev->suspend(pdev, state);
723 for (i = 0; i < card->num_links; i++) {
724 struct snd_soc_dai *cpu_dai = card->dai_link[i].cpu_dai;
725 if (cpu_dai->suspend && cpu_dai->ac97_control)
726 cpu_dai->suspend(cpu_dai);
729 if (card->suspend_post)
730 card->suspend_post(pdev, state);
735 /* deferred resume work, so resume can complete before we finished
736 * setting our codec back up, which can be very slow on I2C
738 static void soc_resume_deferred(struct work_struct *work)
740 struct snd_soc_card *card = container_of(work,
742 deferred_resume_work);
743 struct snd_soc_device *socdev = card->socdev;
744 struct snd_soc_platform *platform = card->platform;
745 struct snd_soc_codec_device *codec_dev = socdev->codec_dev;
746 struct snd_soc_codec *codec = card->codec;
747 struct platform_device *pdev = to_platform_device(socdev->dev);
750 /* our power state is still SNDRV_CTL_POWER_D3hot from suspend time,
751 * so userspace apps are blocked from touching us
754 dev_dbg(socdev->dev, "starting resume work\n");
756 if (card->resume_pre)
757 card->resume_pre(pdev);
759 for (i = 0; i < card->num_links; i++) {
760 struct snd_soc_dai *cpu_dai = card->dai_link[i].cpu_dai;
761 if (cpu_dai->resume && cpu_dai->ac97_control)
762 cpu_dai->resume(cpu_dai);
765 if (codec_dev->resume)
766 codec_dev->resume(pdev);
768 for (i = 0; i < codec->num_dai; i++) {
769 char *stream = codec->dai[i].playback.stream_name;
771 snd_soc_dapm_stream_event(codec, stream,
772 SND_SOC_DAPM_STREAM_RESUME);
773 stream = codec->dai[i].capture.stream_name;
775 snd_soc_dapm_stream_event(codec, stream,
776 SND_SOC_DAPM_STREAM_RESUME);
779 /* unmute any active DACs */
780 for (i = 0; i < card->num_links; i++) {
781 struct snd_soc_dai *dai = card->dai_link[i].codec_dai;
782 if (dai->ops->digital_mute && dai->playback.active)
783 dai->ops->digital_mute(dai, 0);
786 for (i = 0; i < card->num_links; i++) {
787 struct snd_soc_dai *cpu_dai = card->dai_link[i].cpu_dai;
788 if (cpu_dai->resume && !cpu_dai->ac97_control)
789 cpu_dai->resume(cpu_dai);
790 if (platform->resume)
791 platform->resume(cpu_dai);
794 if (card->resume_post)
795 card->resume_post(pdev);
797 dev_dbg(socdev->dev, "resume work completed\n");
799 /* userspace can access us now we are back as we were before */
800 snd_power_change_state(codec->card, SNDRV_CTL_POWER_D0);
803 /* powers up audio subsystem after a suspend */
804 static int soc_resume(struct platform_device *pdev)
806 struct snd_soc_device *socdev = platform_get_drvdata(pdev);
807 struct snd_soc_card *card = socdev->card;
808 struct snd_soc_dai *cpu_dai = card->dai_link[0].cpu_dai;
810 /* AC97 devices might have other drivers hanging off them so
811 * need to resume immediately. Other drivers don't have that
812 * problem and may take a substantial amount of time to resume
813 * due to I/O costs and anti-pop so handle them out of line.
815 if (cpu_dai->ac97_control) {
816 dev_dbg(socdev->dev, "Resuming AC97 immediately\n");
817 soc_resume_deferred(&card->deferred_resume_work);
819 dev_dbg(socdev->dev, "Scheduling resume work\n");
820 if (!schedule_work(&card->deferred_resume_work))
821 dev_err(socdev->dev, "resume work item may be lost\n");
828 #define soc_suspend NULL
829 #define soc_resume NULL
832 static void snd_soc_instantiate_card(struct snd_soc_card *card)
834 struct platform_device *pdev = container_of(card->dev,
835 struct platform_device,
837 struct snd_soc_codec_device *codec_dev = card->socdev->codec_dev;
838 struct snd_soc_platform *platform;
839 struct snd_soc_dai *dai;
840 int i, found, ret, ac97;
842 if (card->instantiated)
846 list_for_each_entry(platform, &platform_list, list)
847 if (card->platform == platform) {
852 dev_dbg(card->dev, "Platform %s not registered\n",
853 card->platform->name);
858 for (i = 0; i < card->num_links; i++) {
860 list_for_each_entry(dai, &dai_list, list)
861 if (card->dai_link[i].cpu_dai == dai) {
866 dev_dbg(card->dev, "DAI %s not registered\n",
867 card->dai_link[i].cpu_dai->name);
871 if (card->dai_link[i].cpu_dai->ac97_control)
875 /* If we have AC97 in the system then don't wait for the
876 * codec. This will need revisiting if we have to handle
877 * systems with mixed AC97 and non-AC97 parts. Only check for
878 * DAIs currently; we can't do this per link since some AC97
879 * codecs have non-AC97 DAIs.
882 for (i = 0; i < card->num_links; i++) {
884 list_for_each_entry(dai, &dai_list, list)
885 if (card->dai_link[i].codec_dai == dai) {
890 dev_dbg(card->dev, "DAI %s not registered\n",
891 card->dai_link[i].codec_dai->name);
896 /* Note that we do not current check for codec components */
898 dev_dbg(card->dev, "All components present, instantiating\n");
900 /* Found everything, bring it up */
902 ret = card->probe(pdev);
907 for (i = 0; i < card->num_links; i++) {
908 struct snd_soc_dai *cpu_dai = card->dai_link[i].cpu_dai;
909 if (cpu_dai->probe) {
910 ret = cpu_dai->probe(pdev, cpu_dai);
916 if (codec_dev->probe) {
917 ret = codec_dev->probe(pdev);
922 if (platform->probe) {
923 ret = platform->probe(pdev);
928 /* DAPM stream work */
929 INIT_DELAYED_WORK(&card->delayed_work, close_delayed_work);
931 /* deferred resume work */
932 INIT_WORK(&card->deferred_resume_work, soc_resume_deferred);
935 card->instantiated = 1;
940 if (codec_dev->remove)
941 codec_dev->remove(pdev);
944 for (i--; i >= 0; i--) {
945 struct snd_soc_dai *cpu_dai = card->dai_link[i].cpu_dai;
947 cpu_dai->remove(pdev, cpu_dai);
955 * Attempt to initialise any uninitalised cards. Must be called with
958 static void snd_soc_instantiate_cards(void)
960 struct snd_soc_card *card;
961 list_for_each_entry(card, &card_list, list)
962 snd_soc_instantiate_card(card);
965 /* probes a new socdev */
966 static int soc_probe(struct platform_device *pdev)
969 struct snd_soc_device *socdev = platform_get_drvdata(pdev);
970 struct snd_soc_card *card = socdev->card;
972 /* Bodge while we push things out of socdev */
973 card->socdev = socdev;
975 /* Bodge while we unpick instantiation */
976 card->dev = &pdev->dev;
977 ret = snd_soc_register_card(card);
979 dev_err(&pdev->dev, "Failed to register card\n");
986 /* removes a socdev */
987 static int soc_remove(struct platform_device *pdev)
990 struct snd_soc_device *socdev = platform_get_drvdata(pdev);
991 struct snd_soc_card *card = socdev->card;
992 struct snd_soc_platform *platform = card->platform;
993 struct snd_soc_codec_device *codec_dev = socdev->codec_dev;
995 run_delayed_work(&card->delayed_work);
997 if (platform->remove)
998 platform->remove(pdev);
1000 if (codec_dev->remove)
1001 codec_dev->remove(pdev);
1003 for (i = 0; i < card->num_links; i++) {
1004 struct snd_soc_dai *cpu_dai = card->dai_link[i].cpu_dai;
1005 if (cpu_dai->remove)
1006 cpu_dai->remove(pdev, cpu_dai);
1012 snd_soc_unregister_card(card);
1017 /* ASoC platform driver */
1018 static struct platform_driver soc_driver = {
1020 .name = "soc-audio",
1021 .owner = THIS_MODULE,
1024 .remove = soc_remove,
1025 .suspend = soc_suspend,
1026 .resume = soc_resume,
1029 /* create a new pcm */
1030 static int soc_new_pcm(struct snd_soc_device *socdev,
1031 struct snd_soc_dai_link *dai_link, int num)
1033 struct snd_soc_card *card = socdev->card;
1034 struct snd_soc_codec *codec = card->codec;
1035 struct snd_soc_platform *platform = card->platform;
1036 struct snd_soc_dai *codec_dai = dai_link->codec_dai;
1037 struct snd_soc_dai *cpu_dai = dai_link->cpu_dai;
1038 struct snd_soc_pcm_runtime *rtd;
1039 struct snd_pcm *pcm;
1041 int ret = 0, playback = 0, capture = 0;
1043 rtd = kzalloc(sizeof(struct snd_soc_pcm_runtime), GFP_KERNEL);
1047 rtd->dai = dai_link;
1048 rtd->socdev = socdev;
1049 codec_dai->codec = card->codec;
1051 /* check client and interface hw capabilities */
1052 sprintf(new_name, "%s %s-%d", dai_link->stream_name, codec_dai->name,
1055 if (codec_dai->playback.channels_min)
1057 if (codec_dai->capture.channels_min)
1060 ret = snd_pcm_new(codec->card, new_name, codec->pcm_devs++, playback,
1063 printk(KERN_ERR "asoc: can't create pcm for codec %s\n",
1069 dai_link->pcm = pcm;
1070 pcm->private_data = rtd;
1071 soc_pcm_ops.mmap = platform->pcm_ops->mmap;
1072 soc_pcm_ops.pointer = platform->pcm_ops->pointer;
1073 soc_pcm_ops.ioctl = platform->pcm_ops->ioctl;
1074 soc_pcm_ops.copy = platform->pcm_ops->copy;
1075 soc_pcm_ops.silence = platform->pcm_ops->silence;
1076 soc_pcm_ops.ack = platform->pcm_ops->ack;
1077 soc_pcm_ops.page = platform->pcm_ops->page;
1080 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &soc_pcm_ops);
1083 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &soc_pcm_ops);
1085 ret = platform->pcm_new(codec->card, codec_dai, pcm);
1087 printk(KERN_ERR "asoc: platform pcm constructor failed\n");
1092 pcm->private_free = platform->pcm_free;
1093 printk(KERN_INFO "asoc: %s <-> %s mapping ok\n", codec_dai->name,
1098 /* codec register dump */
1099 static ssize_t soc_codec_reg_show(struct snd_soc_codec *codec, char *buf)
1101 int i, step = 1, count = 0;
1103 if (!codec->reg_cache_size)
1106 if (codec->reg_cache_step)
1107 step = codec->reg_cache_step;
1109 count += sprintf(buf, "%s registers\n", codec->name);
1110 for (i = 0; i < codec->reg_cache_size; i += step) {
1111 count += sprintf(buf + count, "%2x: ", i);
1112 if (count >= PAGE_SIZE - 1)
1115 if (codec->display_register)
1116 count += codec->display_register(codec, buf + count,
1117 PAGE_SIZE - count, i);
1119 count += snprintf(buf + count, PAGE_SIZE - count,
1120 "%4x", codec->read(codec, i));
1122 if (count >= PAGE_SIZE - 1)
1125 count += snprintf(buf + count, PAGE_SIZE - count, "\n");
1126 if (count >= PAGE_SIZE - 1)
1130 /* Truncate count; min() would cause a warning */
1131 if (count >= PAGE_SIZE)
1132 count = PAGE_SIZE - 1;
1136 static ssize_t codec_reg_show(struct device *dev,
1137 struct device_attribute *attr, char *buf)
1139 struct snd_soc_device *devdata = dev_get_drvdata(dev);
1140 return soc_codec_reg_show(devdata->card->codec, buf);
1143 static DEVICE_ATTR(codec_reg, 0444, codec_reg_show, NULL);
1145 #ifdef CONFIG_DEBUG_FS
1146 static int codec_reg_open_file(struct inode *inode, struct file *file)
1148 file->private_data = inode->i_private;
1152 static ssize_t codec_reg_read_file(struct file *file, char __user *user_buf,
1153 size_t count, loff_t *ppos)
1156 struct snd_soc_codec *codec = file->private_data;
1157 char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
1160 ret = soc_codec_reg_show(codec, buf);
1162 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
1167 static ssize_t codec_reg_write_file(struct file *file,
1168 const char __user *user_buf, size_t count, loff_t *ppos)
1173 unsigned long reg, value;
1175 struct snd_soc_codec *codec = file->private_data;
1177 buf_size = min(count, (sizeof(buf)-1));
1178 if (copy_from_user(buf, user_buf, buf_size))
1182 if (codec->reg_cache_step)
1183 step = codec->reg_cache_step;
1185 while (*start == ' ')
1187 reg = simple_strtoul(start, &start, 16);
1188 if ((reg >= codec->reg_cache_size) || (reg % step))
1190 while (*start == ' ')
1192 if (strict_strtoul(start, 16, &value))
1194 codec->write(codec, reg, value);
1198 static const struct file_operations codec_reg_fops = {
1199 .open = codec_reg_open_file,
1200 .read = codec_reg_read_file,
1201 .write = codec_reg_write_file,
1204 static void soc_init_codec_debugfs(struct snd_soc_codec *codec)
1206 codec->debugfs_reg = debugfs_create_file("codec_reg", 0644,
1207 debugfs_root, codec,
1209 if (!codec->debugfs_reg)
1211 "ASoC: Failed to create codec register debugfs file\n");
1213 codec->debugfs_pop_time = debugfs_create_u32("dapm_pop_time", 0744,
1216 if (!codec->debugfs_pop_time)
1218 "Failed to create pop time debugfs file\n");
1221 static void soc_cleanup_codec_debugfs(struct snd_soc_codec *codec)
1223 debugfs_remove(codec->debugfs_pop_time);
1224 debugfs_remove(codec->debugfs_reg);
1229 static inline void soc_init_codec_debugfs(struct snd_soc_codec *codec)
1233 static inline void soc_cleanup_codec_debugfs(struct snd_soc_codec *codec)
1239 * snd_soc_new_ac97_codec - initailise AC97 device
1240 * @codec: audio codec
1241 * @ops: AC97 bus operations
1242 * @num: AC97 codec number
1244 * Initialises AC97 codec resources for use by ad-hoc devices only.
1246 int snd_soc_new_ac97_codec(struct snd_soc_codec *codec,
1247 struct snd_ac97_bus_ops *ops, int num)
1249 mutex_lock(&codec->mutex);
1251 codec->ac97 = kzalloc(sizeof(struct snd_ac97), GFP_KERNEL);
1252 if (codec->ac97 == NULL) {
1253 mutex_unlock(&codec->mutex);
1257 codec->ac97->bus = kzalloc(sizeof(struct snd_ac97_bus), GFP_KERNEL);
1258 if (codec->ac97->bus == NULL) {
1261 mutex_unlock(&codec->mutex);
1265 codec->ac97->bus->ops = ops;
1266 codec->ac97->num = num;
1267 mutex_unlock(&codec->mutex);
1270 EXPORT_SYMBOL_GPL(snd_soc_new_ac97_codec);
1273 * snd_soc_free_ac97_codec - free AC97 codec device
1274 * @codec: audio codec
1276 * Frees AC97 codec device resources.
1278 void snd_soc_free_ac97_codec(struct snd_soc_codec *codec)
1280 mutex_lock(&codec->mutex);
1281 kfree(codec->ac97->bus);
1284 mutex_unlock(&codec->mutex);
1286 EXPORT_SYMBOL_GPL(snd_soc_free_ac97_codec);
1289 * snd_soc_update_bits - update codec register bits
1290 * @codec: audio codec
1291 * @reg: codec register
1292 * @mask: register mask
1295 * Writes new register value.
1297 * Returns 1 for change else 0.
1299 int snd_soc_update_bits(struct snd_soc_codec *codec, unsigned short reg,
1300 unsigned short mask, unsigned short value)
1303 unsigned short old, new;
1305 mutex_lock(&io_mutex);
1306 old = snd_soc_read(codec, reg);
1307 new = (old & ~mask) | value;
1308 change = old != new;
1310 snd_soc_write(codec, reg, new);
1312 mutex_unlock(&io_mutex);
1315 EXPORT_SYMBOL_GPL(snd_soc_update_bits);
1318 * snd_soc_test_bits - test register for change
1319 * @codec: audio codec
1320 * @reg: codec register
1321 * @mask: register mask
1324 * Tests a register with a new value and checks if the new value is
1325 * different from the old value.
1327 * Returns 1 for change else 0.
1329 int snd_soc_test_bits(struct snd_soc_codec *codec, unsigned short reg,
1330 unsigned short mask, unsigned short value)
1333 unsigned short old, new;
1335 mutex_lock(&io_mutex);
1336 old = snd_soc_read(codec, reg);
1337 new = (old & ~mask) | value;
1338 change = old != new;
1339 mutex_unlock(&io_mutex);
1343 EXPORT_SYMBOL_GPL(snd_soc_test_bits);
1346 * snd_soc_new_pcms - create new sound card and pcms
1347 * @socdev: the SoC audio device
1348 * @idx: ALSA card index
1349 * @xid: card identification
1351 * Create a new sound card based upon the codec and interface pcms.
1353 * Returns 0 for success, else error.
1355 int snd_soc_new_pcms(struct snd_soc_device *socdev, int idx, const char *xid)
1357 struct snd_soc_card *card = socdev->card;
1358 struct snd_soc_codec *codec = card->codec;
1361 mutex_lock(&codec->mutex);
1363 /* register a sound card */
1364 ret = snd_card_create(idx, xid, codec->owner, 0, &codec->card);
1366 printk(KERN_ERR "asoc: can't create sound card for codec %s\n",
1368 mutex_unlock(&codec->mutex);
1372 codec->card->dev = socdev->dev;
1373 codec->card->private_data = codec;
1374 strncpy(codec->card->driver, codec->name, sizeof(codec->card->driver));
1376 /* create the pcms */
1377 for (i = 0; i < card->num_links; i++) {
1378 ret = soc_new_pcm(socdev, &card->dai_link[i], i);
1380 printk(KERN_ERR "asoc: can't create pcm %s\n",
1381 card->dai_link[i].stream_name);
1382 mutex_unlock(&codec->mutex);
1387 mutex_unlock(&codec->mutex);
1390 EXPORT_SYMBOL_GPL(snd_soc_new_pcms);
1393 * snd_soc_init_card - register sound card
1394 * @socdev: the SoC audio device
1396 * Register a SoC sound card. Also registers an AC97 device if the
1397 * codec is AC97 for ad hoc devices.
1399 * Returns 0 for success, else error.
1401 int snd_soc_init_card(struct snd_soc_device *socdev)
1403 struct snd_soc_card *card = socdev->card;
1404 struct snd_soc_codec *codec = card->codec;
1405 int ret = 0, i, ac97 = 0, err = 0;
1407 for (i = 0; i < card->num_links; i++) {
1408 if (card->dai_link[i].init) {
1409 err = card->dai_link[i].init(codec);
1411 printk(KERN_ERR "asoc: failed to init %s\n",
1412 card->dai_link[i].stream_name);
1416 if (card->dai_link[i].codec_dai->ac97_control)
1419 snprintf(codec->card->shortname, sizeof(codec->card->shortname),
1421 snprintf(codec->card->longname, sizeof(codec->card->longname),
1422 "%s (%s)", card->name, codec->name);
1424 ret = snd_card_register(codec->card);
1426 printk(KERN_ERR "asoc: failed to register soundcard for %s\n",
1431 mutex_lock(&codec->mutex);
1432 #ifdef CONFIG_SND_SOC_AC97_BUS
1433 /* Only instantiate AC97 if not already done by the adaptor
1434 * for the generic AC97 subsystem.
1436 if (ac97 && strcmp(codec->name, "AC97") != 0) {
1437 ret = soc_ac97_dev_register(codec);
1439 printk(KERN_ERR "asoc: AC97 device register failed\n");
1440 snd_card_free(codec->card);
1441 mutex_unlock(&codec->mutex);
1447 err = snd_soc_dapm_sys_add(socdev->dev);
1449 printk(KERN_WARNING "asoc: failed to add dapm sysfs entries\n");
1451 err = device_create_file(socdev->dev, &dev_attr_codec_reg);
1453 printk(KERN_WARNING "asoc: failed to add codec sysfs files\n");
1455 soc_init_codec_debugfs(codec);
1456 mutex_unlock(&codec->mutex);
1461 EXPORT_SYMBOL_GPL(snd_soc_init_card);
1464 * snd_soc_free_pcms - free sound card and pcms
1465 * @socdev: the SoC audio device
1467 * Frees sound card and pcms associated with the socdev.
1468 * Also unregister the codec if it is an AC97 device.
1470 void snd_soc_free_pcms(struct snd_soc_device *socdev)
1472 struct snd_soc_codec *codec = socdev->card->codec;
1473 #ifdef CONFIG_SND_SOC_AC97_BUS
1474 struct snd_soc_dai *codec_dai;
1478 mutex_lock(&codec->mutex);
1479 soc_cleanup_codec_debugfs(codec);
1480 #ifdef CONFIG_SND_SOC_AC97_BUS
1481 for (i = 0; i < codec->num_dai; i++) {
1482 codec_dai = &codec->dai[i];
1483 if (codec_dai->ac97_control && codec->ac97 &&
1484 strcmp(codec->name, "AC97") != 0) {
1485 soc_ac97_dev_unregister(codec);
1493 snd_card_free(codec->card);
1494 device_remove_file(socdev->dev, &dev_attr_codec_reg);
1495 mutex_unlock(&codec->mutex);
1497 EXPORT_SYMBOL_GPL(snd_soc_free_pcms);
1500 * snd_soc_set_runtime_hwparams - set the runtime hardware parameters
1501 * @substream: the pcm substream
1502 * @hw: the hardware parameters
1504 * Sets the substream runtime hardware parameters.
1506 int snd_soc_set_runtime_hwparams(struct snd_pcm_substream *substream,
1507 const struct snd_pcm_hardware *hw)
1509 struct snd_pcm_runtime *runtime = substream->runtime;
1510 runtime->hw.info = hw->info;
1511 runtime->hw.formats = hw->formats;
1512 runtime->hw.period_bytes_min = hw->period_bytes_min;
1513 runtime->hw.period_bytes_max = hw->period_bytes_max;
1514 runtime->hw.periods_min = hw->periods_min;
1515 runtime->hw.periods_max = hw->periods_max;
1516 runtime->hw.buffer_bytes_max = hw->buffer_bytes_max;
1517 runtime->hw.fifo_size = hw->fifo_size;
1520 EXPORT_SYMBOL_GPL(snd_soc_set_runtime_hwparams);
1523 * snd_soc_cnew - create new control
1524 * @_template: control template
1525 * @data: control private data
1526 * @long_name: control long name
1528 * Create a new mixer control from a template control.
1530 * Returns 0 for success, else error.
1532 struct snd_kcontrol *snd_soc_cnew(const struct snd_kcontrol_new *_template,
1533 void *data, char *long_name)
1535 struct snd_kcontrol_new template;
1537 memcpy(&template, _template, sizeof(template));
1539 template.name = long_name;
1542 return snd_ctl_new1(&template, data);
1544 EXPORT_SYMBOL_GPL(snd_soc_cnew);
1547 * snd_soc_add_controls - add an array of controls to a codec.
1548 * Convienience function to add a list of controls. Many codecs were
1549 * duplicating this code.
1551 * @codec: codec to add controls to
1552 * @controls: array of controls to add
1553 * @num_controls: number of elements in the array
1555 * Return 0 for success, else error.
1557 int snd_soc_add_controls(struct snd_soc_codec *codec,
1558 const struct snd_kcontrol_new *controls, int num_controls)
1560 struct snd_card *card = codec->card;
1563 for (i = 0; i < num_controls; i++) {
1564 const struct snd_kcontrol_new *control = &controls[i];
1565 err = snd_ctl_add(card, snd_soc_cnew(control, codec, NULL));
1567 dev_err(codec->dev, "%s: Failed to add %s\n",
1568 codec->name, control->name);
1575 EXPORT_SYMBOL_GPL(snd_soc_add_controls);
1578 * snd_soc_info_enum_double - enumerated double mixer info callback
1579 * @kcontrol: mixer control
1580 * @uinfo: control element information
1582 * Callback to provide information about a double enumerated
1585 * Returns 0 for success.
1587 int snd_soc_info_enum_double(struct snd_kcontrol *kcontrol,
1588 struct snd_ctl_elem_info *uinfo)
1590 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
1592 uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
1593 uinfo->count = e->shift_l == e->shift_r ? 1 : 2;
1594 uinfo->value.enumerated.items = e->max;
1596 if (uinfo->value.enumerated.item > e->max - 1)
1597 uinfo->value.enumerated.item = e->max - 1;
1598 strcpy(uinfo->value.enumerated.name,
1599 e->texts[uinfo->value.enumerated.item]);
1602 EXPORT_SYMBOL_GPL(snd_soc_info_enum_double);
1605 * snd_soc_get_enum_double - enumerated double mixer get callback
1606 * @kcontrol: mixer control
1607 * @ucontrol: control element information
1609 * Callback to get the value of a double enumerated mixer.
1611 * Returns 0 for success.
1613 int snd_soc_get_enum_double(struct snd_kcontrol *kcontrol,
1614 struct snd_ctl_elem_value *ucontrol)
1616 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
1617 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
1618 unsigned short val, bitmask;
1620 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
1622 val = snd_soc_read(codec, e->reg);
1623 ucontrol->value.enumerated.item[0]
1624 = (val >> e->shift_l) & (bitmask - 1);
1625 if (e->shift_l != e->shift_r)
1626 ucontrol->value.enumerated.item[1] =
1627 (val >> e->shift_r) & (bitmask - 1);
1631 EXPORT_SYMBOL_GPL(snd_soc_get_enum_double);
1634 * snd_soc_put_enum_double - enumerated double mixer put callback
1635 * @kcontrol: mixer control
1636 * @ucontrol: control element information
1638 * Callback to set the value of a double enumerated mixer.
1640 * Returns 0 for success.
1642 int snd_soc_put_enum_double(struct snd_kcontrol *kcontrol,
1643 struct snd_ctl_elem_value *ucontrol)
1645 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
1646 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
1648 unsigned short mask, bitmask;
1650 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
1652 if (ucontrol->value.enumerated.item[0] > e->max - 1)
1654 val = ucontrol->value.enumerated.item[0] << e->shift_l;
1655 mask = (bitmask - 1) << e->shift_l;
1656 if (e->shift_l != e->shift_r) {
1657 if (ucontrol->value.enumerated.item[1] > e->max - 1)
1659 val |= ucontrol->value.enumerated.item[1] << e->shift_r;
1660 mask |= (bitmask - 1) << e->shift_r;
1663 return snd_soc_update_bits(codec, e->reg, mask, val);
1665 EXPORT_SYMBOL_GPL(snd_soc_put_enum_double);
1668 * snd_soc_get_value_enum_double - semi enumerated double mixer get callback
1669 * @kcontrol: mixer control
1670 * @ucontrol: control element information
1672 * Callback to get the value of a double semi enumerated mixer.
1674 * Semi enumerated mixer: the enumerated items are referred as values. Can be
1675 * used for handling bitfield coded enumeration for example.
1677 * Returns 0 for success.
1679 int snd_soc_get_value_enum_double(struct snd_kcontrol *kcontrol,
1680 struct snd_ctl_elem_value *ucontrol)
1682 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
1683 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
1684 unsigned short reg_val, val, mux;
1686 reg_val = snd_soc_read(codec, e->reg);
1687 val = (reg_val >> e->shift_l) & e->mask;
1688 for (mux = 0; mux < e->max; mux++) {
1689 if (val == e->values[mux])
1692 ucontrol->value.enumerated.item[0] = mux;
1693 if (e->shift_l != e->shift_r) {
1694 val = (reg_val >> e->shift_r) & e->mask;
1695 for (mux = 0; mux < e->max; mux++) {
1696 if (val == e->values[mux])
1699 ucontrol->value.enumerated.item[1] = mux;
1704 EXPORT_SYMBOL_GPL(snd_soc_get_value_enum_double);
1707 * snd_soc_put_value_enum_double - semi enumerated double mixer put callback
1708 * @kcontrol: mixer control
1709 * @ucontrol: control element information
1711 * Callback to set the value of a double semi enumerated mixer.
1713 * Semi enumerated mixer: the enumerated items are referred as values. Can be
1714 * used for handling bitfield coded enumeration for example.
1716 * Returns 0 for success.
1718 int snd_soc_put_value_enum_double(struct snd_kcontrol *kcontrol,
1719 struct snd_ctl_elem_value *ucontrol)
1721 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
1722 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
1724 unsigned short mask;
1726 if (ucontrol->value.enumerated.item[0] > e->max - 1)
1728 val = e->values[ucontrol->value.enumerated.item[0]] << e->shift_l;
1729 mask = e->mask << e->shift_l;
1730 if (e->shift_l != e->shift_r) {
1731 if (ucontrol->value.enumerated.item[1] > e->max - 1)
1733 val |= e->values[ucontrol->value.enumerated.item[1]] << e->shift_r;
1734 mask |= e->mask << e->shift_r;
1737 return snd_soc_update_bits(codec, e->reg, mask, val);
1739 EXPORT_SYMBOL_GPL(snd_soc_put_value_enum_double);
1742 * snd_soc_info_enum_ext - external enumerated single mixer info callback
1743 * @kcontrol: mixer control
1744 * @uinfo: control element information
1746 * Callback to provide information about an external enumerated
1749 * Returns 0 for success.
1751 int snd_soc_info_enum_ext(struct snd_kcontrol *kcontrol,
1752 struct snd_ctl_elem_info *uinfo)
1754 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
1756 uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
1758 uinfo->value.enumerated.items = e->max;
1760 if (uinfo->value.enumerated.item > e->max - 1)
1761 uinfo->value.enumerated.item = e->max - 1;
1762 strcpy(uinfo->value.enumerated.name,
1763 e->texts[uinfo->value.enumerated.item]);
1766 EXPORT_SYMBOL_GPL(snd_soc_info_enum_ext);
1769 * snd_soc_info_volsw_ext - external single mixer info callback
1770 * @kcontrol: mixer control
1771 * @uinfo: control element information
1773 * Callback to provide information about a single external mixer control.
1775 * Returns 0 for success.
1777 int snd_soc_info_volsw_ext(struct snd_kcontrol *kcontrol,
1778 struct snd_ctl_elem_info *uinfo)
1780 int max = kcontrol->private_value;
1782 if (max == 1 && !strstr(kcontrol->id.name, " Volume"))
1783 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
1785 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
1788 uinfo->value.integer.min = 0;
1789 uinfo->value.integer.max = max;
1792 EXPORT_SYMBOL_GPL(snd_soc_info_volsw_ext);
1795 * snd_soc_info_volsw - single mixer info callback
1796 * @kcontrol: mixer control
1797 * @uinfo: control element information
1799 * Callback to provide information about a single mixer control.
1801 * Returns 0 for success.
1803 int snd_soc_info_volsw(struct snd_kcontrol *kcontrol,
1804 struct snd_ctl_elem_info *uinfo)
1806 struct soc_mixer_control *mc =
1807 (struct soc_mixer_control *)kcontrol->private_value;
1809 unsigned int shift = mc->shift;
1810 unsigned int rshift = mc->rshift;
1812 if (max == 1 && !strstr(kcontrol->id.name, " Volume"))
1813 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
1815 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
1817 uinfo->count = shift == rshift ? 1 : 2;
1818 uinfo->value.integer.min = 0;
1819 uinfo->value.integer.max = max;
1822 EXPORT_SYMBOL_GPL(snd_soc_info_volsw);
1825 * snd_soc_get_volsw - single mixer get callback
1826 * @kcontrol: mixer control
1827 * @ucontrol: control element information
1829 * Callback to get the value of a single mixer control.
1831 * Returns 0 for success.
1833 int snd_soc_get_volsw(struct snd_kcontrol *kcontrol,
1834 struct snd_ctl_elem_value *ucontrol)
1836 struct soc_mixer_control *mc =
1837 (struct soc_mixer_control *)kcontrol->private_value;
1838 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
1839 unsigned int reg = mc->reg;
1840 unsigned int shift = mc->shift;
1841 unsigned int rshift = mc->rshift;
1843 unsigned int mask = (1 << fls(max)) - 1;
1844 unsigned int invert = mc->invert;
1846 ucontrol->value.integer.value[0] =
1847 (snd_soc_read(codec, reg) >> shift) & mask;
1848 if (shift != rshift)
1849 ucontrol->value.integer.value[1] =
1850 (snd_soc_read(codec, reg) >> rshift) & mask;
1852 ucontrol->value.integer.value[0] =
1853 max - ucontrol->value.integer.value[0];
1854 if (shift != rshift)
1855 ucontrol->value.integer.value[1] =
1856 max - ucontrol->value.integer.value[1];
1861 EXPORT_SYMBOL_GPL(snd_soc_get_volsw);
1864 * snd_soc_put_volsw - single mixer put callback
1865 * @kcontrol: mixer control
1866 * @ucontrol: control element information
1868 * Callback to set the value of a single mixer control.
1870 * Returns 0 for success.
1872 int snd_soc_put_volsw(struct snd_kcontrol *kcontrol,
1873 struct snd_ctl_elem_value *ucontrol)
1875 struct soc_mixer_control *mc =
1876 (struct soc_mixer_control *)kcontrol->private_value;
1877 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
1878 unsigned int reg = mc->reg;
1879 unsigned int shift = mc->shift;
1880 unsigned int rshift = mc->rshift;
1882 unsigned int mask = (1 << fls(max)) - 1;
1883 unsigned int invert = mc->invert;
1884 unsigned short val, val2, val_mask;
1886 val = (ucontrol->value.integer.value[0] & mask);
1889 val_mask = mask << shift;
1891 if (shift != rshift) {
1892 val2 = (ucontrol->value.integer.value[1] & mask);
1895 val_mask |= mask << rshift;
1896 val |= val2 << rshift;
1898 return snd_soc_update_bits(codec, reg, val_mask, val);
1900 EXPORT_SYMBOL_GPL(snd_soc_put_volsw);
1903 * snd_soc_info_volsw_2r - double mixer info callback
1904 * @kcontrol: mixer control
1905 * @uinfo: control element information
1907 * Callback to provide information about a double mixer control that
1908 * spans 2 codec registers.
1910 * Returns 0 for success.
1912 int snd_soc_info_volsw_2r(struct snd_kcontrol *kcontrol,
1913 struct snd_ctl_elem_info *uinfo)
1915 struct soc_mixer_control *mc =
1916 (struct soc_mixer_control *)kcontrol->private_value;
1919 if (max == 1 && !strstr(kcontrol->id.name, " Volume"))
1920 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
1922 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
1925 uinfo->value.integer.min = 0;
1926 uinfo->value.integer.max = max;
1929 EXPORT_SYMBOL_GPL(snd_soc_info_volsw_2r);
1932 * snd_soc_get_volsw_2r - double mixer get callback
1933 * @kcontrol: mixer control
1934 * @ucontrol: control element information
1936 * Callback to get the value of a double mixer control that spans 2 registers.
1938 * Returns 0 for success.
1940 int snd_soc_get_volsw_2r(struct snd_kcontrol *kcontrol,
1941 struct snd_ctl_elem_value *ucontrol)
1943 struct soc_mixer_control *mc =
1944 (struct soc_mixer_control *)kcontrol->private_value;
1945 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
1946 unsigned int reg = mc->reg;
1947 unsigned int reg2 = mc->rreg;
1948 unsigned int shift = mc->shift;
1950 unsigned int mask = (1<<fls(max))-1;
1951 unsigned int invert = mc->invert;
1953 ucontrol->value.integer.value[0] =
1954 (snd_soc_read(codec, reg) >> shift) & mask;
1955 ucontrol->value.integer.value[1] =
1956 (snd_soc_read(codec, reg2) >> shift) & mask;
1958 ucontrol->value.integer.value[0] =
1959 max - ucontrol->value.integer.value[0];
1960 ucontrol->value.integer.value[1] =
1961 max - ucontrol->value.integer.value[1];
1966 EXPORT_SYMBOL_GPL(snd_soc_get_volsw_2r);
1969 * snd_soc_put_volsw_2r - double mixer set callback
1970 * @kcontrol: mixer control
1971 * @ucontrol: control element information
1973 * Callback to set the value of a double mixer control that spans 2 registers.
1975 * Returns 0 for success.
1977 int snd_soc_put_volsw_2r(struct snd_kcontrol *kcontrol,
1978 struct snd_ctl_elem_value *ucontrol)
1980 struct soc_mixer_control *mc =
1981 (struct soc_mixer_control *)kcontrol->private_value;
1982 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
1983 unsigned int reg = mc->reg;
1984 unsigned int reg2 = mc->rreg;
1985 unsigned int shift = mc->shift;
1987 unsigned int mask = (1 << fls(max)) - 1;
1988 unsigned int invert = mc->invert;
1990 unsigned short val, val2, val_mask;
1992 val_mask = mask << shift;
1993 val = (ucontrol->value.integer.value[0] & mask);
1994 val2 = (ucontrol->value.integer.value[1] & mask);
2002 val2 = val2 << shift;
2004 err = snd_soc_update_bits(codec, reg, val_mask, val);
2008 err = snd_soc_update_bits(codec, reg2, val_mask, val2);
2011 EXPORT_SYMBOL_GPL(snd_soc_put_volsw_2r);
2014 * snd_soc_info_volsw_s8 - signed mixer info callback
2015 * @kcontrol: mixer control
2016 * @uinfo: control element information
2018 * Callback to provide information about a signed mixer control.
2020 * Returns 0 for success.
2022 int snd_soc_info_volsw_s8(struct snd_kcontrol *kcontrol,
2023 struct snd_ctl_elem_info *uinfo)
2025 struct soc_mixer_control *mc =
2026 (struct soc_mixer_control *)kcontrol->private_value;
2030 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
2032 uinfo->value.integer.min = 0;
2033 uinfo->value.integer.max = max-min;
2036 EXPORT_SYMBOL_GPL(snd_soc_info_volsw_s8);
2039 * snd_soc_get_volsw_s8 - signed mixer get callback
2040 * @kcontrol: mixer control
2041 * @ucontrol: control element information
2043 * Callback to get the value of a signed mixer control.
2045 * Returns 0 for success.
2047 int snd_soc_get_volsw_s8(struct snd_kcontrol *kcontrol,
2048 struct snd_ctl_elem_value *ucontrol)
2050 struct soc_mixer_control *mc =
2051 (struct soc_mixer_control *)kcontrol->private_value;
2052 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2053 unsigned int reg = mc->reg;
2055 int val = snd_soc_read(codec, reg);
2057 ucontrol->value.integer.value[0] =
2058 ((signed char)(val & 0xff))-min;
2059 ucontrol->value.integer.value[1] =
2060 ((signed char)((val >> 8) & 0xff))-min;
2063 EXPORT_SYMBOL_GPL(snd_soc_get_volsw_s8);
2066 * snd_soc_put_volsw_sgn - signed mixer put callback
2067 * @kcontrol: mixer control
2068 * @ucontrol: control element information
2070 * Callback to set the value of a signed mixer control.
2072 * Returns 0 for success.
2074 int snd_soc_put_volsw_s8(struct snd_kcontrol *kcontrol,
2075 struct snd_ctl_elem_value *ucontrol)
2077 struct soc_mixer_control *mc =
2078 (struct soc_mixer_control *)kcontrol->private_value;
2079 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2080 unsigned int reg = mc->reg;
2084 val = (ucontrol->value.integer.value[0]+min) & 0xff;
2085 val |= ((ucontrol->value.integer.value[1]+min) & 0xff) << 8;
2087 return snd_soc_update_bits(codec, reg, 0xffff, val);
2089 EXPORT_SYMBOL_GPL(snd_soc_put_volsw_s8);
2092 * snd_soc_dai_set_sysclk - configure DAI system or master clock.
2094 * @clk_id: DAI specific clock ID
2095 * @freq: new clock frequency in Hz
2096 * @dir: new clock direction - input/output.
2098 * Configures the DAI master (MCLK) or system (SYSCLK) clocking.
2100 int snd_soc_dai_set_sysclk(struct snd_soc_dai *dai, int clk_id,
2101 unsigned int freq, int dir)
2103 if (dai->ops && dai->ops->set_sysclk)
2104 return dai->ops->set_sysclk(dai, clk_id, freq, dir);
2108 EXPORT_SYMBOL_GPL(snd_soc_dai_set_sysclk);
2111 * snd_soc_dai_set_clkdiv - configure DAI clock dividers.
2113 * @div_id: DAI specific clock divider ID
2114 * @div: new clock divisor.
2116 * Configures the clock dividers. This is used to derive the best DAI bit and
2117 * frame clocks from the system or master clock. It's best to set the DAI bit
2118 * and frame clocks as low as possible to save system power.
2120 int snd_soc_dai_set_clkdiv(struct snd_soc_dai *dai,
2121 int div_id, int div)
2123 if (dai->ops && dai->ops->set_clkdiv)
2124 return dai->ops->set_clkdiv(dai, div_id, div);
2128 EXPORT_SYMBOL_GPL(snd_soc_dai_set_clkdiv);
2131 * snd_soc_dai_set_pll - configure DAI PLL.
2133 * @pll_id: DAI specific PLL ID
2134 * @freq_in: PLL input clock frequency in Hz
2135 * @freq_out: requested PLL output clock frequency in Hz
2137 * Configures and enables PLL to generate output clock based on input clock.
2139 int snd_soc_dai_set_pll(struct snd_soc_dai *dai,
2140 int pll_id, unsigned int freq_in, unsigned int freq_out)
2142 if (dai->ops && dai->ops->set_pll)
2143 return dai->ops->set_pll(dai, pll_id, freq_in, freq_out);
2147 EXPORT_SYMBOL_GPL(snd_soc_dai_set_pll);
2150 * snd_soc_dai_set_fmt - configure DAI hardware audio format.
2152 * @fmt: SND_SOC_DAIFMT_ format value.
2154 * Configures the DAI hardware format and clocking.
2156 int snd_soc_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
2158 if (dai->ops && dai->ops->set_fmt)
2159 return dai->ops->set_fmt(dai, fmt);
2163 EXPORT_SYMBOL_GPL(snd_soc_dai_set_fmt);
2166 * snd_soc_dai_set_tdm_slot - configure DAI TDM.
2168 * @mask: DAI specific mask representing used slots.
2169 * @slots: Number of slots in use.
2171 * Configures a DAI for TDM operation. Both mask and slots are codec and DAI
2174 int snd_soc_dai_set_tdm_slot(struct snd_soc_dai *dai,
2175 unsigned int mask, int slots)
2177 if (dai->ops && dai->ops->set_tdm_slot)
2178 return dai->ops->set_tdm_slot(dai, mask, slots);
2182 EXPORT_SYMBOL_GPL(snd_soc_dai_set_tdm_slot);
2185 * snd_soc_dai_set_tristate - configure DAI system or master clock.
2187 * @tristate: tristate enable
2189 * Tristates the DAI so that others can use it.
2191 int snd_soc_dai_set_tristate(struct snd_soc_dai *dai, int tristate)
2193 if (dai->ops && dai->ops->set_tristate)
2194 return dai->ops->set_tristate(dai, tristate);
2198 EXPORT_SYMBOL_GPL(snd_soc_dai_set_tristate);
2201 * snd_soc_dai_digital_mute - configure DAI system or master clock.
2203 * @mute: mute enable
2205 * Mutes the DAI DAC.
2207 int snd_soc_dai_digital_mute(struct snd_soc_dai *dai, int mute)
2209 if (dai->ops && dai->ops->digital_mute)
2210 return dai->ops->digital_mute(dai, mute);
2214 EXPORT_SYMBOL_GPL(snd_soc_dai_digital_mute);
2217 * snd_soc_register_card - Register a card with the ASoC core
2219 * @card: Card to register
2221 * Note that currently this is an internal only function: it will be
2222 * exposed to machine drivers after further backporting of ASoC v2
2223 * registration APIs.
2225 static int snd_soc_register_card(struct snd_soc_card *card)
2227 if (!card->name || !card->dev)
2230 INIT_LIST_HEAD(&card->list);
2231 card->instantiated = 0;
2233 mutex_lock(&client_mutex);
2234 list_add(&card->list, &card_list);
2235 snd_soc_instantiate_cards();
2236 mutex_unlock(&client_mutex);
2238 dev_dbg(card->dev, "Registered card '%s'\n", card->name);
2244 * snd_soc_unregister_card - Unregister a card with the ASoC core
2246 * @card: Card to unregister
2248 * Note that currently this is an internal only function: it will be
2249 * exposed to machine drivers after further backporting of ASoC v2
2250 * registration APIs.
2252 static int snd_soc_unregister_card(struct snd_soc_card *card)
2254 mutex_lock(&client_mutex);
2255 list_del(&card->list);
2256 mutex_unlock(&client_mutex);
2258 dev_dbg(card->dev, "Unregistered card '%s'\n", card->name);
2263 static struct snd_soc_dai_ops null_dai_ops = {
2267 * snd_soc_register_dai - Register a DAI with the ASoC core
2269 * @dai: DAI to register
2271 int snd_soc_register_dai(struct snd_soc_dai *dai)
2276 /* The device should become mandatory over time */
2278 printk(KERN_WARNING "No device for DAI %s\n", dai->name);
2281 dai->ops = &null_dai_ops;
2283 INIT_LIST_HEAD(&dai->list);
2285 mutex_lock(&client_mutex);
2286 list_add(&dai->list, &dai_list);
2287 snd_soc_instantiate_cards();
2288 mutex_unlock(&client_mutex);
2290 pr_debug("Registered DAI '%s'\n", dai->name);
2294 EXPORT_SYMBOL_GPL(snd_soc_register_dai);
2297 * snd_soc_unregister_dai - Unregister a DAI from the ASoC core
2299 * @dai: DAI to unregister
2301 void snd_soc_unregister_dai(struct snd_soc_dai *dai)
2303 mutex_lock(&client_mutex);
2304 list_del(&dai->list);
2305 mutex_unlock(&client_mutex);
2307 pr_debug("Unregistered DAI '%s'\n", dai->name);
2309 EXPORT_SYMBOL_GPL(snd_soc_unregister_dai);
2312 * snd_soc_register_dais - Register multiple DAIs with the ASoC core
2314 * @dai: Array of DAIs to register
2315 * @count: Number of DAIs
2317 int snd_soc_register_dais(struct snd_soc_dai *dai, size_t count)
2321 for (i = 0; i < count; i++) {
2322 ret = snd_soc_register_dai(&dai[i]);
2330 for (i--; i >= 0; i--)
2331 snd_soc_unregister_dai(&dai[i]);
2335 EXPORT_SYMBOL_GPL(snd_soc_register_dais);
2338 * snd_soc_unregister_dais - Unregister multiple DAIs from the ASoC core
2340 * @dai: Array of DAIs to unregister
2341 * @count: Number of DAIs
2343 void snd_soc_unregister_dais(struct snd_soc_dai *dai, size_t count)
2347 for (i = 0; i < count; i++)
2348 snd_soc_unregister_dai(&dai[i]);
2350 EXPORT_SYMBOL_GPL(snd_soc_unregister_dais);
2353 * snd_soc_register_platform - Register a platform with the ASoC core
2355 * @platform: platform to register
2357 int snd_soc_register_platform(struct snd_soc_platform *platform)
2359 if (!platform->name)
2362 INIT_LIST_HEAD(&platform->list);
2364 mutex_lock(&client_mutex);
2365 list_add(&platform->list, &platform_list);
2366 snd_soc_instantiate_cards();
2367 mutex_unlock(&client_mutex);
2369 pr_debug("Registered platform '%s'\n", platform->name);
2373 EXPORT_SYMBOL_GPL(snd_soc_register_platform);
2376 * snd_soc_unregister_platform - Unregister a platform from the ASoC core
2378 * @platform: platform to unregister
2380 void snd_soc_unregister_platform(struct snd_soc_platform *platform)
2382 mutex_lock(&client_mutex);
2383 list_del(&platform->list);
2384 mutex_unlock(&client_mutex);
2386 pr_debug("Unregistered platform '%s'\n", platform->name);
2388 EXPORT_SYMBOL_GPL(snd_soc_unregister_platform);
2391 * snd_soc_register_codec - Register a codec with the ASoC core
2393 * @codec: codec to register
2395 int snd_soc_register_codec(struct snd_soc_codec *codec)
2400 /* The device should become mandatory over time */
2402 printk(KERN_WARNING "No device for codec %s\n", codec->name);
2404 INIT_LIST_HEAD(&codec->list);
2406 mutex_lock(&client_mutex);
2407 list_add(&codec->list, &codec_list);
2408 snd_soc_instantiate_cards();
2409 mutex_unlock(&client_mutex);
2411 pr_debug("Registered codec '%s'\n", codec->name);
2415 EXPORT_SYMBOL_GPL(snd_soc_register_codec);
2418 * snd_soc_unregister_codec - Unregister a codec from the ASoC core
2420 * @codec: codec to unregister
2422 void snd_soc_unregister_codec(struct snd_soc_codec *codec)
2424 mutex_lock(&client_mutex);
2425 list_del(&codec->list);
2426 mutex_unlock(&client_mutex);
2428 pr_debug("Unregistered codec '%s'\n", codec->name);
2430 EXPORT_SYMBOL_GPL(snd_soc_unregister_codec);
2432 static int __init snd_soc_init(void)
2434 #ifdef CONFIG_DEBUG_FS
2435 debugfs_root = debugfs_create_dir("asoc", NULL);
2436 if (IS_ERR(debugfs_root) || !debugfs_root) {
2438 "ASoC: Failed to create debugfs directory\n");
2439 debugfs_root = NULL;
2443 return platform_driver_register(&soc_driver);
2446 static void __exit snd_soc_exit(void)
2448 #ifdef CONFIG_DEBUG_FS
2449 debugfs_remove_recursive(debugfs_root);
2451 platform_driver_unregister(&soc_driver);
2454 module_init(snd_soc_init);
2455 module_exit(snd_soc_exit);
2457 /* Module information */
2458 MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
2459 MODULE_DESCRIPTION("ALSA SoC Core");
2460 MODULE_LICENSE("GPL");
2461 MODULE_ALIAS("platform:soc-audio");