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_codec *codec = card->codec;
303 struct snd_soc_dai *codec_dai;
306 mutex_lock(&pcm_mutex);
307 for (i = 0; i < codec->num_dai; i++) {
308 codec_dai = &codec->dai[i];
310 pr_debug("pop wq checking: %s status: %s waiting: %s\n",
311 codec_dai->playback.stream_name,
312 codec_dai->playback.active ? "active" : "inactive",
313 codec_dai->pop_wait ? "yes" : "no");
315 /* are we waiting on this codec DAI stream */
316 if (codec_dai->pop_wait == 1) {
317 codec_dai->pop_wait = 0;
318 snd_soc_dapm_stream_event(codec,
319 codec_dai->playback.stream_name,
320 SND_SOC_DAPM_STREAM_STOP);
323 mutex_unlock(&pcm_mutex);
327 * Called by ALSA when a PCM substream is closed. Private data can be
328 * freed here. The cpu DAI, codec DAI, machine and platform are also
331 static int soc_codec_close(struct snd_pcm_substream *substream)
333 struct snd_soc_pcm_runtime *rtd = substream->private_data;
334 struct snd_soc_device *socdev = rtd->socdev;
335 struct snd_soc_card *card = socdev->card;
336 struct snd_soc_dai_link *machine = rtd->dai;
337 struct snd_soc_platform *platform = card->platform;
338 struct snd_soc_dai *cpu_dai = machine->cpu_dai;
339 struct snd_soc_dai *codec_dai = machine->codec_dai;
340 struct snd_soc_codec *codec = card->codec;
342 mutex_lock(&pcm_mutex);
344 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
345 cpu_dai->playback.active = codec_dai->playback.active = 0;
347 cpu_dai->capture.active = codec_dai->capture.active = 0;
349 if (codec_dai->playback.active == 0 &&
350 codec_dai->capture.active == 0) {
351 cpu_dai->active = codec_dai->active = 0;
355 /* Muting the DAC suppresses artifacts caused during digital
356 * shutdown, for example from stopping clocks.
358 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
359 snd_soc_dai_digital_mute(codec_dai, 1);
361 if (cpu_dai->ops->shutdown)
362 cpu_dai->ops->shutdown(substream, cpu_dai);
364 if (codec_dai->ops->shutdown)
365 codec_dai->ops->shutdown(substream, codec_dai);
367 if (machine->ops && machine->ops->shutdown)
368 machine->ops->shutdown(substream);
370 if (platform->pcm_ops->close)
371 platform->pcm_ops->close(substream);
372 cpu_dai->runtime = NULL;
374 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
375 /* start delayed pop wq here for playback streams */
376 codec_dai->pop_wait = 1;
377 schedule_delayed_work(&card->delayed_work,
378 msecs_to_jiffies(pmdown_time));
380 /* capture streams can be powered down now */
381 snd_soc_dapm_stream_event(codec,
382 codec_dai->capture.stream_name,
383 SND_SOC_DAPM_STREAM_STOP);
386 mutex_unlock(&pcm_mutex);
391 * Called by ALSA when the PCM substream is prepared, can set format, sample
392 * rate, etc. This function is non atomic and can be called multiple times,
393 * it can refer to the runtime info.
395 static int soc_pcm_prepare(struct snd_pcm_substream *substream)
397 struct snd_soc_pcm_runtime *rtd = substream->private_data;
398 struct snd_soc_device *socdev = rtd->socdev;
399 struct snd_soc_card *card = socdev->card;
400 struct snd_soc_dai_link *machine = rtd->dai;
401 struct snd_soc_platform *platform = card->platform;
402 struct snd_soc_dai *cpu_dai = machine->cpu_dai;
403 struct snd_soc_dai *codec_dai = machine->codec_dai;
404 struct snd_soc_codec *codec = card->codec;
407 mutex_lock(&pcm_mutex);
409 if (machine->ops && machine->ops->prepare) {
410 ret = machine->ops->prepare(substream);
412 printk(KERN_ERR "asoc: machine prepare error\n");
417 if (platform->pcm_ops->prepare) {
418 ret = platform->pcm_ops->prepare(substream);
420 printk(KERN_ERR "asoc: platform prepare error\n");
425 if (codec_dai->ops->prepare) {
426 ret = codec_dai->ops->prepare(substream, codec_dai);
428 printk(KERN_ERR "asoc: codec DAI prepare error\n");
433 if (cpu_dai->ops->prepare) {
434 ret = cpu_dai->ops->prepare(substream, cpu_dai);
436 printk(KERN_ERR "asoc: cpu DAI prepare error\n");
441 /* cancel any delayed stream shutdown that is pending */
442 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
443 codec_dai->pop_wait) {
444 codec_dai->pop_wait = 0;
445 cancel_delayed_work(&card->delayed_work);
448 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
449 snd_soc_dapm_stream_event(codec,
450 codec_dai->playback.stream_name,
451 SND_SOC_DAPM_STREAM_START);
453 snd_soc_dapm_stream_event(codec,
454 codec_dai->capture.stream_name,
455 SND_SOC_DAPM_STREAM_START);
457 snd_soc_dai_digital_mute(codec_dai, 0);
460 mutex_unlock(&pcm_mutex);
465 * Called by ALSA when the hardware params are set by application. This
466 * function can also be called multiple times and can allocate buffers
467 * (using snd_pcm_lib_* ). It's non-atomic.
469 static int soc_pcm_hw_params(struct snd_pcm_substream *substream,
470 struct snd_pcm_hw_params *params)
472 struct snd_soc_pcm_runtime *rtd = substream->private_data;
473 struct snd_soc_device *socdev = rtd->socdev;
474 struct snd_soc_dai_link *machine = rtd->dai;
475 struct snd_soc_card *card = socdev->card;
476 struct snd_soc_platform *platform = card->platform;
477 struct snd_soc_dai *cpu_dai = machine->cpu_dai;
478 struct snd_soc_dai *codec_dai = machine->codec_dai;
481 mutex_lock(&pcm_mutex);
483 if (machine->ops && machine->ops->hw_params) {
484 ret = machine->ops->hw_params(substream, params);
486 printk(KERN_ERR "asoc: machine hw_params failed\n");
491 if (codec_dai->ops->hw_params) {
492 ret = codec_dai->ops->hw_params(substream, params, codec_dai);
494 printk(KERN_ERR "asoc: can't set codec %s hw params\n",
500 if (cpu_dai->ops->hw_params) {
501 ret = cpu_dai->ops->hw_params(substream, params, cpu_dai);
503 printk(KERN_ERR "asoc: interface %s hw params failed\n",
509 if (platform->pcm_ops->hw_params) {
510 ret = platform->pcm_ops->hw_params(substream, params);
512 printk(KERN_ERR "asoc: platform %s hw params failed\n",
518 machine->rate = params_rate(params);
521 mutex_unlock(&pcm_mutex);
525 if (cpu_dai->ops->hw_free)
526 cpu_dai->ops->hw_free(substream, cpu_dai);
529 if (codec_dai->ops->hw_free)
530 codec_dai->ops->hw_free(substream, codec_dai);
533 if (machine->ops && machine->ops->hw_free)
534 machine->ops->hw_free(substream);
536 mutex_unlock(&pcm_mutex);
541 * Free's resources allocated by hw_params, can be called multiple times
543 static int soc_pcm_hw_free(struct snd_pcm_substream *substream)
545 struct snd_soc_pcm_runtime *rtd = substream->private_data;
546 struct snd_soc_device *socdev = rtd->socdev;
547 struct snd_soc_dai_link *machine = rtd->dai;
548 struct snd_soc_card *card = socdev->card;
549 struct snd_soc_platform *platform = card->platform;
550 struct snd_soc_dai *cpu_dai = machine->cpu_dai;
551 struct snd_soc_dai *codec_dai = machine->codec_dai;
552 struct snd_soc_codec *codec = card->codec;
554 mutex_lock(&pcm_mutex);
556 /* apply codec digital mute */
558 snd_soc_dai_digital_mute(codec_dai, 1);
560 /* free any machine hw params */
561 if (machine->ops && machine->ops->hw_free)
562 machine->ops->hw_free(substream);
564 /* free any DMA resources */
565 if (platform->pcm_ops->hw_free)
566 platform->pcm_ops->hw_free(substream);
568 /* now free hw params for the DAI's */
569 if (codec_dai->ops->hw_free)
570 codec_dai->ops->hw_free(substream, codec_dai);
572 if (cpu_dai->ops->hw_free)
573 cpu_dai->ops->hw_free(substream, cpu_dai);
575 mutex_unlock(&pcm_mutex);
579 static int soc_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
581 struct snd_soc_pcm_runtime *rtd = substream->private_data;
582 struct snd_soc_device *socdev = rtd->socdev;
583 struct snd_soc_card *card= socdev->card;
584 struct snd_soc_dai_link *machine = rtd->dai;
585 struct snd_soc_platform *platform = card->platform;
586 struct snd_soc_dai *cpu_dai = machine->cpu_dai;
587 struct snd_soc_dai *codec_dai = machine->codec_dai;
590 if (codec_dai->ops->trigger) {
591 ret = codec_dai->ops->trigger(substream, cmd, codec_dai);
596 if (platform->pcm_ops->trigger) {
597 ret = platform->pcm_ops->trigger(substream, cmd);
602 if (cpu_dai->ops->trigger) {
603 ret = cpu_dai->ops->trigger(substream, cmd, cpu_dai);
610 /* ASoC PCM operations */
611 static struct snd_pcm_ops soc_pcm_ops = {
612 .open = soc_pcm_open,
613 .close = soc_codec_close,
614 .hw_params = soc_pcm_hw_params,
615 .hw_free = soc_pcm_hw_free,
616 .prepare = soc_pcm_prepare,
617 .trigger = soc_pcm_trigger,
621 /* powers down audio subsystem for suspend */
622 static int soc_suspend(struct platform_device *pdev, pm_message_t state)
624 struct snd_soc_device *socdev = platform_get_drvdata(pdev);
625 struct snd_soc_card *card = socdev->card;
626 struct snd_soc_platform *platform = card->platform;
627 struct snd_soc_codec_device *codec_dev = socdev->codec_dev;
628 struct snd_soc_codec *codec = card->codec;
631 /* If the initialization of this soc device failed, there is no codec
632 * associated with it. Just bail out in this case.
637 /* Due to the resume being scheduled into a workqueue we could
638 * suspend before that's finished - wait for it to complete.
640 snd_power_lock(codec->card);
641 snd_power_wait(codec->card, SNDRV_CTL_POWER_D0);
642 snd_power_unlock(codec->card);
644 /* we're going to block userspace touching us until resume completes */
645 snd_power_change_state(codec->card, SNDRV_CTL_POWER_D3hot);
647 /* mute any active DAC's */
648 for (i = 0; i < card->num_links; i++) {
649 struct snd_soc_dai *dai = card->dai_link[i].codec_dai;
650 if (dai->ops->digital_mute && dai->playback.active)
651 dai->ops->digital_mute(dai, 1);
654 /* suspend all pcms */
655 for (i = 0; i < card->num_links; i++)
656 snd_pcm_suspend_all(card->dai_link[i].pcm);
658 if (card->suspend_pre)
659 card->suspend_pre(pdev, state);
661 for (i = 0; i < card->num_links; i++) {
662 struct snd_soc_dai *cpu_dai = card->dai_link[i].cpu_dai;
663 if (cpu_dai->suspend && !cpu_dai->ac97_control)
664 cpu_dai->suspend(cpu_dai);
665 if (platform->suspend)
666 platform->suspend(cpu_dai);
669 /* close any waiting streams and save state */
670 run_delayed_work(&card->delayed_work);
671 codec->suspend_bias_level = codec->bias_level;
673 for (i = 0; i < codec->num_dai; i++) {
674 char *stream = codec->dai[i].playback.stream_name;
676 snd_soc_dapm_stream_event(codec, stream,
677 SND_SOC_DAPM_STREAM_SUSPEND);
678 stream = codec->dai[i].capture.stream_name;
680 snd_soc_dapm_stream_event(codec, stream,
681 SND_SOC_DAPM_STREAM_SUSPEND);
684 if (codec_dev->suspend)
685 codec_dev->suspend(pdev, state);
687 for (i = 0; i < card->num_links; i++) {
688 struct snd_soc_dai *cpu_dai = card->dai_link[i].cpu_dai;
689 if (cpu_dai->suspend && cpu_dai->ac97_control)
690 cpu_dai->suspend(cpu_dai);
693 if (card->suspend_post)
694 card->suspend_post(pdev, state);
699 /* deferred resume work, so resume can complete before we finished
700 * setting our codec back up, which can be very slow on I2C
702 static void soc_resume_deferred(struct work_struct *work)
704 struct snd_soc_card *card = container_of(work,
706 deferred_resume_work);
707 struct snd_soc_device *socdev = card->socdev;
708 struct snd_soc_platform *platform = card->platform;
709 struct snd_soc_codec_device *codec_dev = socdev->codec_dev;
710 struct snd_soc_codec *codec = card->codec;
711 struct platform_device *pdev = to_platform_device(socdev->dev);
714 /* our power state is still SNDRV_CTL_POWER_D3hot from suspend time,
715 * so userspace apps are blocked from touching us
718 dev_dbg(socdev->dev, "starting resume work\n");
720 if (card->resume_pre)
721 card->resume_pre(pdev);
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->resume && cpu_dai->ac97_control)
726 cpu_dai->resume(cpu_dai);
729 if (codec_dev->resume)
730 codec_dev->resume(pdev);
732 for (i = 0; i < codec->num_dai; i++) {
733 char *stream = codec->dai[i].playback.stream_name;
735 snd_soc_dapm_stream_event(codec, stream,
736 SND_SOC_DAPM_STREAM_RESUME);
737 stream = codec->dai[i].capture.stream_name;
739 snd_soc_dapm_stream_event(codec, stream,
740 SND_SOC_DAPM_STREAM_RESUME);
743 /* unmute any active DACs */
744 for (i = 0; i < card->num_links; i++) {
745 struct snd_soc_dai *dai = card->dai_link[i].codec_dai;
746 if (dai->ops->digital_mute && dai->playback.active)
747 dai->ops->digital_mute(dai, 0);
750 for (i = 0; i < card->num_links; i++) {
751 struct snd_soc_dai *cpu_dai = card->dai_link[i].cpu_dai;
752 if (cpu_dai->resume && !cpu_dai->ac97_control)
753 cpu_dai->resume(cpu_dai);
754 if (platform->resume)
755 platform->resume(cpu_dai);
758 if (card->resume_post)
759 card->resume_post(pdev);
761 dev_dbg(socdev->dev, "resume work completed\n");
763 /* userspace can access us now we are back as we were before */
764 snd_power_change_state(codec->card, SNDRV_CTL_POWER_D0);
767 /* powers up audio subsystem after a suspend */
768 static int soc_resume(struct platform_device *pdev)
770 struct snd_soc_device *socdev = platform_get_drvdata(pdev);
771 struct snd_soc_card *card = socdev->card;
772 struct snd_soc_dai *cpu_dai = card->dai_link[0].cpu_dai;
774 /* AC97 devices might have other drivers hanging off them so
775 * need to resume immediately. Other drivers don't have that
776 * problem and may take a substantial amount of time to resume
777 * due to I/O costs and anti-pop so handle them out of line.
779 if (cpu_dai->ac97_control) {
780 dev_dbg(socdev->dev, "Resuming AC97 immediately\n");
781 soc_resume_deferred(&card->deferred_resume_work);
783 dev_dbg(socdev->dev, "Scheduling resume work\n");
784 if (!schedule_work(&card->deferred_resume_work))
785 dev_err(socdev->dev, "resume work item may be lost\n");
792 #define soc_suspend NULL
793 #define soc_resume NULL
796 static void snd_soc_instantiate_card(struct snd_soc_card *card)
798 struct platform_device *pdev = container_of(card->dev,
799 struct platform_device,
801 struct snd_soc_codec_device *codec_dev = card->socdev->codec_dev;
802 struct snd_soc_platform *platform;
803 struct snd_soc_dai *dai;
804 int i, found, ret, ac97;
806 if (card->instantiated)
810 list_for_each_entry(platform, &platform_list, list)
811 if (card->platform == platform) {
816 dev_dbg(card->dev, "Platform %s not registered\n",
817 card->platform->name);
822 for (i = 0; i < card->num_links; i++) {
824 list_for_each_entry(dai, &dai_list, list)
825 if (card->dai_link[i].cpu_dai == dai) {
830 dev_dbg(card->dev, "DAI %s not registered\n",
831 card->dai_link[i].cpu_dai->name);
835 if (card->dai_link[i].cpu_dai->ac97_control)
839 /* If we have AC97 in the system then don't wait for the
840 * codec. This will need revisiting if we have to handle
841 * systems with mixed AC97 and non-AC97 parts. Only check for
842 * DAIs currently; we can't do this per link since some AC97
843 * codecs have non-AC97 DAIs.
846 for (i = 0; i < card->num_links; i++) {
848 list_for_each_entry(dai, &dai_list, list)
849 if (card->dai_link[i].codec_dai == dai) {
854 dev_dbg(card->dev, "DAI %s not registered\n",
855 card->dai_link[i].codec_dai->name);
860 /* Note that we do not current check for codec components */
862 dev_dbg(card->dev, "All components present, instantiating\n");
864 /* Found everything, bring it up */
866 ret = card->probe(pdev);
871 for (i = 0; i < card->num_links; i++) {
872 struct snd_soc_dai *cpu_dai = card->dai_link[i].cpu_dai;
873 if (cpu_dai->probe) {
874 ret = cpu_dai->probe(pdev, cpu_dai);
880 if (codec_dev->probe) {
881 ret = codec_dev->probe(pdev);
886 if (platform->probe) {
887 ret = platform->probe(pdev);
892 /* DAPM stream work */
893 INIT_DELAYED_WORK(&card->delayed_work, close_delayed_work);
895 /* deferred resume work */
896 INIT_WORK(&card->deferred_resume_work, soc_resume_deferred);
899 card->instantiated = 1;
904 if (codec_dev->remove)
905 codec_dev->remove(pdev);
908 for (i--; i >= 0; i--) {
909 struct snd_soc_dai *cpu_dai = card->dai_link[i].cpu_dai;
911 cpu_dai->remove(pdev, cpu_dai);
919 * Attempt to initialise any uninitalised cards. Must be called with
922 static void snd_soc_instantiate_cards(void)
924 struct snd_soc_card *card;
925 list_for_each_entry(card, &card_list, list)
926 snd_soc_instantiate_card(card);
929 /* probes a new socdev */
930 static int soc_probe(struct platform_device *pdev)
933 struct snd_soc_device *socdev = platform_get_drvdata(pdev);
934 struct snd_soc_card *card = socdev->card;
936 /* Bodge while we push things out of socdev */
937 card->socdev = socdev;
939 /* Bodge while we unpick instantiation */
940 card->dev = &pdev->dev;
941 ret = snd_soc_register_card(card);
943 dev_err(&pdev->dev, "Failed to register card\n");
950 /* removes a socdev */
951 static int soc_remove(struct platform_device *pdev)
954 struct snd_soc_device *socdev = platform_get_drvdata(pdev);
955 struct snd_soc_card *card = socdev->card;
956 struct snd_soc_platform *platform = card->platform;
957 struct snd_soc_codec_device *codec_dev = socdev->codec_dev;
959 if (!card->instantiated)
962 run_delayed_work(&card->delayed_work);
964 if (platform->remove)
965 platform->remove(pdev);
967 if (codec_dev->remove)
968 codec_dev->remove(pdev);
970 for (i = 0; i < card->num_links; i++) {
971 struct snd_soc_dai *cpu_dai = card->dai_link[i].cpu_dai;
973 cpu_dai->remove(pdev, cpu_dai);
979 snd_soc_unregister_card(card);
984 /* ASoC platform driver */
985 static struct platform_driver soc_driver = {
988 .owner = THIS_MODULE,
991 .remove = soc_remove,
992 .suspend = soc_suspend,
993 .resume = soc_resume,
996 /* create a new pcm */
997 static int soc_new_pcm(struct snd_soc_device *socdev,
998 struct snd_soc_dai_link *dai_link, int num)
1000 struct snd_soc_card *card = socdev->card;
1001 struct snd_soc_codec *codec = card->codec;
1002 struct snd_soc_platform *platform = card->platform;
1003 struct snd_soc_dai *codec_dai = dai_link->codec_dai;
1004 struct snd_soc_dai *cpu_dai = dai_link->cpu_dai;
1005 struct snd_soc_pcm_runtime *rtd;
1006 struct snd_pcm *pcm;
1008 int ret = 0, playback = 0, capture = 0;
1010 rtd = kzalloc(sizeof(struct snd_soc_pcm_runtime), GFP_KERNEL);
1014 rtd->dai = dai_link;
1015 rtd->socdev = socdev;
1016 codec_dai->codec = card->codec;
1018 /* check client and interface hw capabilities */
1019 sprintf(new_name, "%s %s-%d", dai_link->stream_name, codec_dai->name,
1022 if (codec_dai->playback.channels_min)
1024 if (codec_dai->capture.channels_min)
1027 ret = snd_pcm_new(codec->card, new_name, codec->pcm_devs++, playback,
1030 printk(KERN_ERR "asoc: can't create pcm for codec %s\n",
1036 dai_link->pcm = pcm;
1037 pcm->private_data = rtd;
1038 soc_pcm_ops.mmap = platform->pcm_ops->mmap;
1039 soc_pcm_ops.pointer = platform->pcm_ops->pointer;
1040 soc_pcm_ops.ioctl = platform->pcm_ops->ioctl;
1041 soc_pcm_ops.copy = platform->pcm_ops->copy;
1042 soc_pcm_ops.silence = platform->pcm_ops->silence;
1043 soc_pcm_ops.ack = platform->pcm_ops->ack;
1044 soc_pcm_ops.page = platform->pcm_ops->page;
1047 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &soc_pcm_ops);
1050 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &soc_pcm_ops);
1052 ret = platform->pcm_new(codec->card, codec_dai, pcm);
1054 printk(KERN_ERR "asoc: platform pcm constructor failed\n");
1059 pcm->private_free = platform->pcm_free;
1060 printk(KERN_INFO "asoc: %s <-> %s mapping ok\n", codec_dai->name,
1065 /* codec register dump */
1066 static ssize_t soc_codec_reg_show(struct snd_soc_codec *codec, char *buf)
1068 int i, step = 1, count = 0;
1070 if (!codec->reg_cache_size)
1073 if (codec->reg_cache_step)
1074 step = codec->reg_cache_step;
1076 count += sprintf(buf, "%s registers\n", codec->name);
1077 for (i = 0; i < codec->reg_cache_size; i += step) {
1078 count += sprintf(buf + count, "%2x: ", i);
1079 if (count >= PAGE_SIZE - 1)
1082 if (codec->display_register)
1083 count += codec->display_register(codec, buf + count,
1084 PAGE_SIZE - count, i);
1086 count += snprintf(buf + count, PAGE_SIZE - count,
1087 "%4x", codec->read(codec, i));
1089 if (count >= PAGE_SIZE - 1)
1092 count += snprintf(buf + count, PAGE_SIZE - count, "\n");
1093 if (count >= PAGE_SIZE - 1)
1097 /* Truncate count; min() would cause a warning */
1098 if (count >= PAGE_SIZE)
1099 count = PAGE_SIZE - 1;
1103 static ssize_t codec_reg_show(struct device *dev,
1104 struct device_attribute *attr, char *buf)
1106 struct snd_soc_device *devdata = dev_get_drvdata(dev);
1107 return soc_codec_reg_show(devdata->card->codec, buf);
1110 static DEVICE_ATTR(codec_reg, 0444, codec_reg_show, NULL);
1112 #ifdef CONFIG_DEBUG_FS
1113 static int codec_reg_open_file(struct inode *inode, struct file *file)
1115 file->private_data = inode->i_private;
1119 static ssize_t codec_reg_read_file(struct file *file, char __user *user_buf,
1120 size_t count, loff_t *ppos)
1123 struct snd_soc_codec *codec = file->private_data;
1124 char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
1127 ret = soc_codec_reg_show(codec, buf);
1129 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
1134 static ssize_t codec_reg_write_file(struct file *file,
1135 const char __user *user_buf, size_t count, loff_t *ppos)
1140 unsigned long reg, value;
1142 struct snd_soc_codec *codec = file->private_data;
1144 buf_size = min(count, (sizeof(buf)-1));
1145 if (copy_from_user(buf, user_buf, buf_size))
1149 if (codec->reg_cache_step)
1150 step = codec->reg_cache_step;
1152 while (*start == ' ')
1154 reg = simple_strtoul(start, &start, 16);
1155 if ((reg >= codec->reg_cache_size) || (reg % step))
1157 while (*start == ' ')
1159 if (strict_strtoul(start, 16, &value))
1161 codec->write(codec, reg, value);
1165 static const struct file_operations codec_reg_fops = {
1166 .open = codec_reg_open_file,
1167 .read = codec_reg_read_file,
1168 .write = codec_reg_write_file,
1171 static void soc_init_codec_debugfs(struct snd_soc_codec *codec)
1173 codec->debugfs_reg = debugfs_create_file("codec_reg", 0644,
1174 debugfs_root, codec,
1176 if (!codec->debugfs_reg)
1178 "ASoC: Failed to create codec register debugfs file\n");
1180 codec->debugfs_pop_time = debugfs_create_u32("dapm_pop_time", 0744,
1183 if (!codec->debugfs_pop_time)
1185 "Failed to create pop time debugfs file\n");
1188 static void soc_cleanup_codec_debugfs(struct snd_soc_codec *codec)
1190 debugfs_remove(codec->debugfs_pop_time);
1191 debugfs_remove(codec->debugfs_reg);
1196 static inline void soc_init_codec_debugfs(struct snd_soc_codec *codec)
1200 static inline void soc_cleanup_codec_debugfs(struct snd_soc_codec *codec)
1206 * snd_soc_new_ac97_codec - initailise AC97 device
1207 * @codec: audio codec
1208 * @ops: AC97 bus operations
1209 * @num: AC97 codec number
1211 * Initialises AC97 codec resources for use by ad-hoc devices only.
1213 int snd_soc_new_ac97_codec(struct snd_soc_codec *codec,
1214 struct snd_ac97_bus_ops *ops, int num)
1216 mutex_lock(&codec->mutex);
1218 codec->ac97 = kzalloc(sizeof(struct snd_ac97), GFP_KERNEL);
1219 if (codec->ac97 == NULL) {
1220 mutex_unlock(&codec->mutex);
1224 codec->ac97->bus = kzalloc(sizeof(struct snd_ac97_bus), GFP_KERNEL);
1225 if (codec->ac97->bus == NULL) {
1228 mutex_unlock(&codec->mutex);
1232 codec->ac97->bus->ops = ops;
1233 codec->ac97->num = num;
1234 mutex_unlock(&codec->mutex);
1237 EXPORT_SYMBOL_GPL(snd_soc_new_ac97_codec);
1240 * snd_soc_free_ac97_codec - free AC97 codec device
1241 * @codec: audio codec
1243 * Frees AC97 codec device resources.
1245 void snd_soc_free_ac97_codec(struct snd_soc_codec *codec)
1247 mutex_lock(&codec->mutex);
1248 kfree(codec->ac97->bus);
1251 mutex_unlock(&codec->mutex);
1253 EXPORT_SYMBOL_GPL(snd_soc_free_ac97_codec);
1256 * snd_soc_update_bits - update codec register bits
1257 * @codec: audio codec
1258 * @reg: codec register
1259 * @mask: register mask
1262 * Writes new register value.
1264 * Returns 1 for change else 0.
1266 int snd_soc_update_bits(struct snd_soc_codec *codec, unsigned short reg,
1267 unsigned short mask, unsigned short value)
1270 unsigned short old, new;
1272 mutex_lock(&io_mutex);
1273 old = snd_soc_read(codec, reg);
1274 new = (old & ~mask) | value;
1275 change = old != new;
1277 snd_soc_write(codec, reg, new);
1279 mutex_unlock(&io_mutex);
1282 EXPORT_SYMBOL_GPL(snd_soc_update_bits);
1285 * snd_soc_test_bits - test register for change
1286 * @codec: audio codec
1287 * @reg: codec register
1288 * @mask: register mask
1291 * Tests a register with a new value and checks if the new value is
1292 * different from the old value.
1294 * Returns 1 for change else 0.
1296 int snd_soc_test_bits(struct snd_soc_codec *codec, unsigned short reg,
1297 unsigned short mask, unsigned short value)
1300 unsigned short old, new;
1302 mutex_lock(&io_mutex);
1303 old = snd_soc_read(codec, reg);
1304 new = (old & ~mask) | value;
1305 change = old != new;
1306 mutex_unlock(&io_mutex);
1310 EXPORT_SYMBOL_GPL(snd_soc_test_bits);
1313 * snd_soc_new_pcms - create new sound card and pcms
1314 * @socdev: the SoC audio device
1315 * @idx: ALSA card index
1316 * @xid: card identification
1318 * Create a new sound card based upon the codec and interface pcms.
1320 * Returns 0 for success, else error.
1322 int snd_soc_new_pcms(struct snd_soc_device *socdev, int idx, const char *xid)
1324 struct snd_soc_card *card = socdev->card;
1325 struct snd_soc_codec *codec = card->codec;
1328 mutex_lock(&codec->mutex);
1330 /* register a sound card */
1331 ret = snd_card_create(idx, xid, codec->owner, 0, &codec->card);
1333 printk(KERN_ERR "asoc: can't create sound card for codec %s\n",
1335 mutex_unlock(&codec->mutex);
1339 codec->socdev = socdev;
1340 codec->card->dev = socdev->dev;
1341 codec->card->private_data = codec;
1342 strncpy(codec->card->driver, codec->name, sizeof(codec->card->driver));
1344 /* create the pcms */
1345 for (i = 0; i < card->num_links; i++) {
1346 ret = soc_new_pcm(socdev, &card->dai_link[i], i);
1348 printk(KERN_ERR "asoc: can't create pcm %s\n",
1349 card->dai_link[i].stream_name);
1350 mutex_unlock(&codec->mutex);
1355 mutex_unlock(&codec->mutex);
1358 EXPORT_SYMBOL_GPL(snd_soc_new_pcms);
1361 * snd_soc_init_card - register sound card
1362 * @socdev: the SoC audio device
1364 * Register a SoC sound card. Also registers an AC97 device if the
1365 * codec is AC97 for ad hoc devices.
1367 * Returns 0 for success, else error.
1369 int snd_soc_init_card(struct snd_soc_device *socdev)
1371 struct snd_soc_card *card = socdev->card;
1372 struct snd_soc_codec *codec = card->codec;
1373 int ret = 0, i, ac97 = 0, err = 0;
1375 for (i = 0; i < card->num_links; i++) {
1376 if (card->dai_link[i].init) {
1377 err = card->dai_link[i].init(codec);
1379 printk(KERN_ERR "asoc: failed to init %s\n",
1380 card->dai_link[i].stream_name);
1384 if (card->dai_link[i].codec_dai->ac97_control)
1387 snprintf(codec->card->shortname, sizeof(codec->card->shortname),
1389 snprintf(codec->card->longname, sizeof(codec->card->longname),
1390 "%s (%s)", card->name, codec->name);
1392 ret = snd_card_register(codec->card);
1394 printk(KERN_ERR "asoc: failed to register soundcard for %s\n",
1399 mutex_lock(&codec->mutex);
1400 #ifdef CONFIG_SND_SOC_AC97_BUS
1401 /* Only instantiate AC97 if not already done by the adaptor
1402 * for the generic AC97 subsystem.
1404 if (ac97 && strcmp(codec->name, "AC97") != 0) {
1405 ret = soc_ac97_dev_register(codec);
1407 printk(KERN_ERR "asoc: AC97 device register failed\n");
1408 snd_card_free(codec->card);
1409 mutex_unlock(&codec->mutex);
1415 err = snd_soc_dapm_sys_add(socdev->dev);
1417 printk(KERN_WARNING "asoc: failed to add dapm sysfs entries\n");
1419 err = device_create_file(socdev->dev, &dev_attr_codec_reg);
1421 printk(KERN_WARNING "asoc: failed to add codec sysfs files\n");
1423 soc_init_codec_debugfs(codec);
1424 mutex_unlock(&codec->mutex);
1429 EXPORT_SYMBOL_GPL(snd_soc_init_card);
1432 * snd_soc_free_pcms - free sound card and pcms
1433 * @socdev: the SoC audio device
1435 * Frees sound card and pcms associated with the socdev.
1436 * Also unregister the codec if it is an AC97 device.
1438 void snd_soc_free_pcms(struct snd_soc_device *socdev)
1440 struct snd_soc_codec *codec = socdev->card->codec;
1441 #ifdef CONFIG_SND_SOC_AC97_BUS
1442 struct snd_soc_dai *codec_dai;
1446 mutex_lock(&codec->mutex);
1447 soc_cleanup_codec_debugfs(codec);
1448 #ifdef CONFIG_SND_SOC_AC97_BUS
1449 for (i = 0; i < codec->num_dai; i++) {
1450 codec_dai = &codec->dai[i];
1451 if (codec_dai->ac97_control && codec->ac97 &&
1452 strcmp(codec->name, "AC97") != 0) {
1453 soc_ac97_dev_unregister(codec);
1461 snd_card_free(codec->card);
1462 device_remove_file(socdev->dev, &dev_attr_codec_reg);
1463 mutex_unlock(&codec->mutex);
1465 EXPORT_SYMBOL_GPL(snd_soc_free_pcms);
1468 * snd_soc_set_runtime_hwparams - set the runtime hardware parameters
1469 * @substream: the pcm substream
1470 * @hw: the hardware parameters
1472 * Sets the substream runtime hardware parameters.
1474 int snd_soc_set_runtime_hwparams(struct snd_pcm_substream *substream,
1475 const struct snd_pcm_hardware *hw)
1477 struct snd_pcm_runtime *runtime = substream->runtime;
1478 runtime->hw.info = hw->info;
1479 runtime->hw.formats = hw->formats;
1480 runtime->hw.period_bytes_min = hw->period_bytes_min;
1481 runtime->hw.period_bytes_max = hw->period_bytes_max;
1482 runtime->hw.periods_min = hw->periods_min;
1483 runtime->hw.periods_max = hw->periods_max;
1484 runtime->hw.buffer_bytes_max = hw->buffer_bytes_max;
1485 runtime->hw.fifo_size = hw->fifo_size;
1488 EXPORT_SYMBOL_GPL(snd_soc_set_runtime_hwparams);
1491 * snd_soc_cnew - create new control
1492 * @_template: control template
1493 * @data: control private data
1494 * @long_name: control long name
1496 * Create a new mixer control from a template control.
1498 * Returns 0 for success, else error.
1500 struct snd_kcontrol *snd_soc_cnew(const struct snd_kcontrol_new *_template,
1501 void *data, char *long_name)
1503 struct snd_kcontrol_new template;
1505 memcpy(&template, _template, sizeof(template));
1507 template.name = long_name;
1510 return snd_ctl_new1(&template, data);
1512 EXPORT_SYMBOL_GPL(snd_soc_cnew);
1515 * snd_soc_add_controls - add an array of controls to a codec.
1516 * Convienience function to add a list of controls. Many codecs were
1517 * duplicating this code.
1519 * @codec: codec to add controls to
1520 * @controls: array of controls to add
1521 * @num_controls: number of elements in the array
1523 * Return 0 for success, else error.
1525 int snd_soc_add_controls(struct snd_soc_codec *codec,
1526 const struct snd_kcontrol_new *controls, int num_controls)
1528 struct snd_card *card = codec->card;
1531 for (i = 0; i < num_controls; i++) {
1532 const struct snd_kcontrol_new *control = &controls[i];
1533 err = snd_ctl_add(card, snd_soc_cnew(control, codec, NULL));
1535 dev_err(codec->dev, "%s: Failed to add %s\n",
1536 codec->name, control->name);
1543 EXPORT_SYMBOL_GPL(snd_soc_add_controls);
1546 * snd_soc_info_enum_double - enumerated double mixer info callback
1547 * @kcontrol: mixer control
1548 * @uinfo: control element information
1550 * Callback to provide information about a double enumerated
1553 * Returns 0 for success.
1555 int snd_soc_info_enum_double(struct snd_kcontrol *kcontrol,
1556 struct snd_ctl_elem_info *uinfo)
1558 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
1560 uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
1561 uinfo->count = e->shift_l == e->shift_r ? 1 : 2;
1562 uinfo->value.enumerated.items = e->max;
1564 if (uinfo->value.enumerated.item > e->max - 1)
1565 uinfo->value.enumerated.item = e->max - 1;
1566 strcpy(uinfo->value.enumerated.name,
1567 e->texts[uinfo->value.enumerated.item]);
1570 EXPORT_SYMBOL_GPL(snd_soc_info_enum_double);
1573 * snd_soc_get_enum_double - enumerated double mixer get callback
1574 * @kcontrol: mixer control
1575 * @ucontrol: control element information
1577 * Callback to get the value of a double enumerated mixer.
1579 * Returns 0 for success.
1581 int snd_soc_get_enum_double(struct snd_kcontrol *kcontrol,
1582 struct snd_ctl_elem_value *ucontrol)
1584 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
1585 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
1586 unsigned short val, bitmask;
1588 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
1590 val = snd_soc_read(codec, e->reg);
1591 ucontrol->value.enumerated.item[0]
1592 = (val >> e->shift_l) & (bitmask - 1);
1593 if (e->shift_l != e->shift_r)
1594 ucontrol->value.enumerated.item[1] =
1595 (val >> e->shift_r) & (bitmask - 1);
1599 EXPORT_SYMBOL_GPL(snd_soc_get_enum_double);
1602 * snd_soc_put_enum_double - enumerated double mixer put callback
1603 * @kcontrol: mixer control
1604 * @ucontrol: control element information
1606 * Callback to set the value of a double enumerated mixer.
1608 * Returns 0 for success.
1610 int snd_soc_put_enum_double(struct snd_kcontrol *kcontrol,
1611 struct snd_ctl_elem_value *ucontrol)
1613 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
1614 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
1616 unsigned short mask, bitmask;
1618 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
1620 if (ucontrol->value.enumerated.item[0] > e->max - 1)
1622 val = ucontrol->value.enumerated.item[0] << e->shift_l;
1623 mask = (bitmask - 1) << e->shift_l;
1624 if (e->shift_l != e->shift_r) {
1625 if (ucontrol->value.enumerated.item[1] > e->max - 1)
1627 val |= ucontrol->value.enumerated.item[1] << e->shift_r;
1628 mask |= (bitmask - 1) << e->shift_r;
1631 return snd_soc_update_bits(codec, e->reg, mask, val);
1633 EXPORT_SYMBOL_GPL(snd_soc_put_enum_double);
1636 * snd_soc_get_value_enum_double - semi enumerated double mixer get callback
1637 * @kcontrol: mixer control
1638 * @ucontrol: control element information
1640 * Callback to get the value of a double semi enumerated mixer.
1642 * Semi enumerated mixer: the enumerated items are referred as values. Can be
1643 * used for handling bitfield coded enumeration for example.
1645 * Returns 0 for success.
1647 int snd_soc_get_value_enum_double(struct snd_kcontrol *kcontrol,
1648 struct snd_ctl_elem_value *ucontrol)
1650 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
1651 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
1652 unsigned short reg_val, val, mux;
1654 reg_val = snd_soc_read(codec, e->reg);
1655 val = (reg_val >> e->shift_l) & e->mask;
1656 for (mux = 0; mux < e->max; mux++) {
1657 if (val == e->values[mux])
1660 ucontrol->value.enumerated.item[0] = mux;
1661 if (e->shift_l != e->shift_r) {
1662 val = (reg_val >> e->shift_r) & e->mask;
1663 for (mux = 0; mux < e->max; mux++) {
1664 if (val == e->values[mux])
1667 ucontrol->value.enumerated.item[1] = mux;
1672 EXPORT_SYMBOL_GPL(snd_soc_get_value_enum_double);
1675 * snd_soc_put_value_enum_double - semi enumerated double mixer put callback
1676 * @kcontrol: mixer control
1677 * @ucontrol: control element information
1679 * Callback to set the value of a double semi enumerated mixer.
1681 * Semi enumerated mixer: the enumerated items are referred as values. Can be
1682 * used for handling bitfield coded enumeration for example.
1684 * Returns 0 for success.
1686 int snd_soc_put_value_enum_double(struct snd_kcontrol *kcontrol,
1687 struct snd_ctl_elem_value *ucontrol)
1689 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
1690 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
1692 unsigned short mask;
1694 if (ucontrol->value.enumerated.item[0] > e->max - 1)
1696 val = e->values[ucontrol->value.enumerated.item[0]] << e->shift_l;
1697 mask = e->mask << e->shift_l;
1698 if (e->shift_l != e->shift_r) {
1699 if (ucontrol->value.enumerated.item[1] > e->max - 1)
1701 val |= e->values[ucontrol->value.enumerated.item[1]] << e->shift_r;
1702 mask |= e->mask << e->shift_r;
1705 return snd_soc_update_bits(codec, e->reg, mask, val);
1707 EXPORT_SYMBOL_GPL(snd_soc_put_value_enum_double);
1710 * snd_soc_info_enum_ext - external enumerated single mixer info callback
1711 * @kcontrol: mixer control
1712 * @uinfo: control element information
1714 * Callback to provide information about an external enumerated
1717 * Returns 0 for success.
1719 int snd_soc_info_enum_ext(struct snd_kcontrol *kcontrol,
1720 struct snd_ctl_elem_info *uinfo)
1722 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
1724 uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
1726 uinfo->value.enumerated.items = e->max;
1728 if (uinfo->value.enumerated.item > e->max - 1)
1729 uinfo->value.enumerated.item = e->max - 1;
1730 strcpy(uinfo->value.enumerated.name,
1731 e->texts[uinfo->value.enumerated.item]);
1734 EXPORT_SYMBOL_GPL(snd_soc_info_enum_ext);
1737 * snd_soc_info_volsw_ext - external single mixer info callback
1738 * @kcontrol: mixer control
1739 * @uinfo: control element information
1741 * Callback to provide information about a single external mixer control.
1743 * Returns 0 for success.
1745 int snd_soc_info_volsw_ext(struct snd_kcontrol *kcontrol,
1746 struct snd_ctl_elem_info *uinfo)
1748 int max = kcontrol->private_value;
1750 if (max == 1 && !strstr(kcontrol->id.name, " Volume"))
1751 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
1753 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
1756 uinfo->value.integer.min = 0;
1757 uinfo->value.integer.max = max;
1760 EXPORT_SYMBOL_GPL(snd_soc_info_volsw_ext);
1763 * snd_soc_info_volsw - single mixer info callback
1764 * @kcontrol: mixer control
1765 * @uinfo: control element information
1767 * Callback to provide information about a single mixer control.
1769 * Returns 0 for success.
1771 int snd_soc_info_volsw(struct snd_kcontrol *kcontrol,
1772 struct snd_ctl_elem_info *uinfo)
1774 struct soc_mixer_control *mc =
1775 (struct soc_mixer_control *)kcontrol->private_value;
1777 unsigned int shift = mc->shift;
1778 unsigned int rshift = mc->rshift;
1780 if (max == 1 && !strstr(kcontrol->id.name, " Volume"))
1781 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
1783 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
1785 uinfo->count = shift == rshift ? 1 : 2;
1786 uinfo->value.integer.min = 0;
1787 uinfo->value.integer.max = max;
1790 EXPORT_SYMBOL_GPL(snd_soc_info_volsw);
1793 * snd_soc_get_volsw - single mixer get callback
1794 * @kcontrol: mixer control
1795 * @ucontrol: control element information
1797 * Callback to get the value of a single mixer control.
1799 * Returns 0 for success.
1801 int snd_soc_get_volsw(struct snd_kcontrol *kcontrol,
1802 struct snd_ctl_elem_value *ucontrol)
1804 struct soc_mixer_control *mc =
1805 (struct soc_mixer_control *)kcontrol->private_value;
1806 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
1807 unsigned int reg = mc->reg;
1808 unsigned int shift = mc->shift;
1809 unsigned int rshift = mc->rshift;
1811 unsigned int mask = (1 << fls(max)) - 1;
1812 unsigned int invert = mc->invert;
1814 ucontrol->value.integer.value[0] =
1815 (snd_soc_read(codec, reg) >> shift) & mask;
1816 if (shift != rshift)
1817 ucontrol->value.integer.value[1] =
1818 (snd_soc_read(codec, reg) >> rshift) & mask;
1820 ucontrol->value.integer.value[0] =
1821 max - ucontrol->value.integer.value[0];
1822 if (shift != rshift)
1823 ucontrol->value.integer.value[1] =
1824 max - ucontrol->value.integer.value[1];
1829 EXPORT_SYMBOL_GPL(snd_soc_get_volsw);
1832 * snd_soc_put_volsw - single mixer put callback
1833 * @kcontrol: mixer control
1834 * @ucontrol: control element information
1836 * Callback to set the value of a single mixer control.
1838 * Returns 0 for success.
1840 int snd_soc_put_volsw(struct snd_kcontrol *kcontrol,
1841 struct snd_ctl_elem_value *ucontrol)
1843 struct soc_mixer_control *mc =
1844 (struct soc_mixer_control *)kcontrol->private_value;
1845 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
1846 unsigned int reg = mc->reg;
1847 unsigned int shift = mc->shift;
1848 unsigned int rshift = mc->rshift;
1850 unsigned int mask = (1 << fls(max)) - 1;
1851 unsigned int invert = mc->invert;
1852 unsigned short val, val2, val_mask;
1854 val = (ucontrol->value.integer.value[0] & mask);
1857 val_mask = mask << shift;
1859 if (shift != rshift) {
1860 val2 = (ucontrol->value.integer.value[1] & mask);
1863 val_mask |= mask << rshift;
1864 val |= val2 << rshift;
1866 return snd_soc_update_bits(codec, reg, val_mask, val);
1868 EXPORT_SYMBOL_GPL(snd_soc_put_volsw);
1871 * snd_soc_info_volsw_2r - double mixer info callback
1872 * @kcontrol: mixer control
1873 * @uinfo: control element information
1875 * Callback to provide information about a double mixer control that
1876 * spans 2 codec registers.
1878 * Returns 0 for success.
1880 int snd_soc_info_volsw_2r(struct snd_kcontrol *kcontrol,
1881 struct snd_ctl_elem_info *uinfo)
1883 struct soc_mixer_control *mc =
1884 (struct soc_mixer_control *)kcontrol->private_value;
1887 if (max == 1 && !strstr(kcontrol->id.name, " Volume"))
1888 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
1890 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
1893 uinfo->value.integer.min = 0;
1894 uinfo->value.integer.max = max;
1897 EXPORT_SYMBOL_GPL(snd_soc_info_volsw_2r);
1900 * snd_soc_get_volsw_2r - double mixer get callback
1901 * @kcontrol: mixer control
1902 * @ucontrol: control element information
1904 * Callback to get the value of a double mixer control that spans 2 registers.
1906 * Returns 0 for success.
1908 int snd_soc_get_volsw_2r(struct snd_kcontrol *kcontrol,
1909 struct snd_ctl_elem_value *ucontrol)
1911 struct soc_mixer_control *mc =
1912 (struct soc_mixer_control *)kcontrol->private_value;
1913 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
1914 unsigned int reg = mc->reg;
1915 unsigned int reg2 = mc->rreg;
1916 unsigned int shift = mc->shift;
1918 unsigned int mask = (1<<fls(max))-1;
1919 unsigned int invert = mc->invert;
1921 ucontrol->value.integer.value[0] =
1922 (snd_soc_read(codec, reg) >> shift) & mask;
1923 ucontrol->value.integer.value[1] =
1924 (snd_soc_read(codec, reg2) >> shift) & mask;
1926 ucontrol->value.integer.value[0] =
1927 max - ucontrol->value.integer.value[0];
1928 ucontrol->value.integer.value[1] =
1929 max - ucontrol->value.integer.value[1];
1934 EXPORT_SYMBOL_GPL(snd_soc_get_volsw_2r);
1937 * snd_soc_put_volsw_2r - double mixer set callback
1938 * @kcontrol: mixer control
1939 * @ucontrol: control element information
1941 * Callback to set the value of a double mixer control that spans 2 registers.
1943 * Returns 0 for success.
1945 int snd_soc_put_volsw_2r(struct snd_kcontrol *kcontrol,
1946 struct snd_ctl_elem_value *ucontrol)
1948 struct soc_mixer_control *mc =
1949 (struct soc_mixer_control *)kcontrol->private_value;
1950 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
1951 unsigned int reg = mc->reg;
1952 unsigned int reg2 = mc->rreg;
1953 unsigned int shift = mc->shift;
1955 unsigned int mask = (1 << fls(max)) - 1;
1956 unsigned int invert = mc->invert;
1958 unsigned short val, val2, val_mask;
1960 val_mask = mask << shift;
1961 val = (ucontrol->value.integer.value[0] & mask);
1962 val2 = (ucontrol->value.integer.value[1] & mask);
1970 val2 = val2 << shift;
1972 err = snd_soc_update_bits(codec, reg, val_mask, val);
1976 err = snd_soc_update_bits(codec, reg2, val_mask, val2);
1979 EXPORT_SYMBOL_GPL(snd_soc_put_volsw_2r);
1982 * snd_soc_info_volsw_s8 - signed mixer info callback
1983 * @kcontrol: mixer control
1984 * @uinfo: control element information
1986 * Callback to provide information about a signed mixer control.
1988 * Returns 0 for success.
1990 int snd_soc_info_volsw_s8(struct snd_kcontrol *kcontrol,
1991 struct snd_ctl_elem_info *uinfo)
1993 struct soc_mixer_control *mc =
1994 (struct soc_mixer_control *)kcontrol->private_value;
1998 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
2000 uinfo->value.integer.min = 0;
2001 uinfo->value.integer.max = max-min;
2004 EXPORT_SYMBOL_GPL(snd_soc_info_volsw_s8);
2007 * snd_soc_get_volsw_s8 - signed mixer get callback
2008 * @kcontrol: mixer control
2009 * @ucontrol: control element information
2011 * Callback to get the value of a signed mixer control.
2013 * Returns 0 for success.
2015 int snd_soc_get_volsw_s8(struct snd_kcontrol *kcontrol,
2016 struct snd_ctl_elem_value *ucontrol)
2018 struct soc_mixer_control *mc =
2019 (struct soc_mixer_control *)kcontrol->private_value;
2020 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2021 unsigned int reg = mc->reg;
2023 int val = snd_soc_read(codec, reg);
2025 ucontrol->value.integer.value[0] =
2026 ((signed char)(val & 0xff))-min;
2027 ucontrol->value.integer.value[1] =
2028 ((signed char)((val >> 8) & 0xff))-min;
2031 EXPORT_SYMBOL_GPL(snd_soc_get_volsw_s8);
2034 * snd_soc_put_volsw_sgn - signed mixer put callback
2035 * @kcontrol: mixer control
2036 * @ucontrol: control element information
2038 * Callback to set the value of a signed mixer control.
2040 * Returns 0 for success.
2042 int snd_soc_put_volsw_s8(struct snd_kcontrol *kcontrol,
2043 struct snd_ctl_elem_value *ucontrol)
2045 struct soc_mixer_control *mc =
2046 (struct soc_mixer_control *)kcontrol->private_value;
2047 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2048 unsigned int reg = mc->reg;
2052 val = (ucontrol->value.integer.value[0]+min) & 0xff;
2053 val |= ((ucontrol->value.integer.value[1]+min) & 0xff) << 8;
2055 return snd_soc_update_bits(codec, reg, 0xffff, val);
2057 EXPORT_SYMBOL_GPL(snd_soc_put_volsw_s8);
2060 * snd_soc_dai_set_sysclk - configure DAI system or master clock.
2062 * @clk_id: DAI specific clock ID
2063 * @freq: new clock frequency in Hz
2064 * @dir: new clock direction - input/output.
2066 * Configures the DAI master (MCLK) or system (SYSCLK) clocking.
2068 int snd_soc_dai_set_sysclk(struct snd_soc_dai *dai, int clk_id,
2069 unsigned int freq, int dir)
2071 if (dai->ops && dai->ops->set_sysclk)
2072 return dai->ops->set_sysclk(dai, clk_id, freq, dir);
2076 EXPORT_SYMBOL_GPL(snd_soc_dai_set_sysclk);
2079 * snd_soc_dai_set_clkdiv - configure DAI clock dividers.
2081 * @div_id: DAI specific clock divider ID
2082 * @div: new clock divisor.
2084 * Configures the clock dividers. This is used to derive the best DAI bit and
2085 * frame clocks from the system or master clock. It's best to set the DAI bit
2086 * and frame clocks as low as possible to save system power.
2088 int snd_soc_dai_set_clkdiv(struct snd_soc_dai *dai,
2089 int div_id, int div)
2091 if (dai->ops && dai->ops->set_clkdiv)
2092 return dai->ops->set_clkdiv(dai, div_id, div);
2096 EXPORT_SYMBOL_GPL(snd_soc_dai_set_clkdiv);
2099 * snd_soc_dai_set_pll - configure DAI PLL.
2101 * @pll_id: DAI specific PLL ID
2102 * @freq_in: PLL input clock frequency in Hz
2103 * @freq_out: requested PLL output clock frequency in Hz
2105 * Configures and enables PLL to generate output clock based on input clock.
2107 int snd_soc_dai_set_pll(struct snd_soc_dai *dai,
2108 int pll_id, unsigned int freq_in, unsigned int freq_out)
2110 if (dai->ops && dai->ops->set_pll)
2111 return dai->ops->set_pll(dai, pll_id, freq_in, freq_out);
2115 EXPORT_SYMBOL_GPL(snd_soc_dai_set_pll);
2118 * snd_soc_dai_set_fmt - configure DAI hardware audio format.
2120 * @fmt: SND_SOC_DAIFMT_ format value.
2122 * Configures the DAI hardware format and clocking.
2124 int snd_soc_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
2126 if (dai->ops && dai->ops->set_fmt)
2127 return dai->ops->set_fmt(dai, fmt);
2131 EXPORT_SYMBOL_GPL(snd_soc_dai_set_fmt);
2134 * snd_soc_dai_set_tdm_slot - configure DAI TDM.
2136 * @mask: DAI specific mask representing used slots.
2137 * @slots: Number of slots in use.
2139 * Configures a DAI for TDM operation. Both mask and slots are codec and DAI
2142 int snd_soc_dai_set_tdm_slot(struct snd_soc_dai *dai,
2143 unsigned int mask, int slots)
2145 if (dai->ops && dai->ops->set_tdm_slot)
2146 return dai->ops->set_tdm_slot(dai, mask, slots);
2150 EXPORT_SYMBOL_GPL(snd_soc_dai_set_tdm_slot);
2153 * snd_soc_dai_set_tristate - configure DAI system or master clock.
2155 * @tristate: tristate enable
2157 * Tristates the DAI so that others can use it.
2159 int snd_soc_dai_set_tristate(struct snd_soc_dai *dai, int tristate)
2161 if (dai->ops && dai->ops->set_tristate)
2162 return dai->ops->set_tristate(dai, tristate);
2166 EXPORT_SYMBOL_GPL(snd_soc_dai_set_tristate);
2169 * snd_soc_dai_digital_mute - configure DAI system or master clock.
2171 * @mute: mute enable
2173 * Mutes the DAI DAC.
2175 int snd_soc_dai_digital_mute(struct snd_soc_dai *dai, int mute)
2177 if (dai->ops && dai->ops->digital_mute)
2178 return dai->ops->digital_mute(dai, mute);
2182 EXPORT_SYMBOL_GPL(snd_soc_dai_digital_mute);
2185 * snd_soc_register_card - Register a card with the ASoC core
2187 * @card: Card to register
2189 * Note that currently this is an internal only function: it will be
2190 * exposed to machine drivers after further backporting of ASoC v2
2191 * registration APIs.
2193 static int snd_soc_register_card(struct snd_soc_card *card)
2195 if (!card->name || !card->dev)
2198 INIT_LIST_HEAD(&card->list);
2199 card->instantiated = 0;
2201 mutex_lock(&client_mutex);
2202 list_add(&card->list, &card_list);
2203 snd_soc_instantiate_cards();
2204 mutex_unlock(&client_mutex);
2206 dev_dbg(card->dev, "Registered card '%s'\n", card->name);
2212 * snd_soc_unregister_card - Unregister a card with the ASoC core
2214 * @card: Card to unregister
2216 * Note that currently this is an internal only function: it will be
2217 * exposed to machine drivers after further backporting of ASoC v2
2218 * registration APIs.
2220 static int snd_soc_unregister_card(struct snd_soc_card *card)
2222 mutex_lock(&client_mutex);
2223 list_del(&card->list);
2224 mutex_unlock(&client_mutex);
2226 dev_dbg(card->dev, "Unregistered card '%s'\n", card->name);
2231 static struct snd_soc_dai_ops null_dai_ops = {
2235 * snd_soc_register_dai - Register a DAI with the ASoC core
2237 * @dai: DAI to register
2239 int snd_soc_register_dai(struct snd_soc_dai *dai)
2244 /* The device should become mandatory over time */
2246 printk(KERN_WARNING "No device for DAI %s\n", dai->name);
2249 dai->ops = &null_dai_ops;
2251 INIT_LIST_HEAD(&dai->list);
2253 mutex_lock(&client_mutex);
2254 list_add(&dai->list, &dai_list);
2255 snd_soc_instantiate_cards();
2256 mutex_unlock(&client_mutex);
2258 pr_debug("Registered DAI '%s'\n", dai->name);
2262 EXPORT_SYMBOL_GPL(snd_soc_register_dai);
2265 * snd_soc_unregister_dai - Unregister a DAI from the ASoC core
2267 * @dai: DAI to unregister
2269 void snd_soc_unregister_dai(struct snd_soc_dai *dai)
2271 mutex_lock(&client_mutex);
2272 list_del(&dai->list);
2273 mutex_unlock(&client_mutex);
2275 pr_debug("Unregistered DAI '%s'\n", dai->name);
2277 EXPORT_SYMBOL_GPL(snd_soc_unregister_dai);
2280 * snd_soc_register_dais - Register multiple DAIs with the ASoC core
2282 * @dai: Array of DAIs to register
2283 * @count: Number of DAIs
2285 int snd_soc_register_dais(struct snd_soc_dai *dai, size_t count)
2289 for (i = 0; i < count; i++) {
2290 ret = snd_soc_register_dai(&dai[i]);
2298 for (i--; i >= 0; i--)
2299 snd_soc_unregister_dai(&dai[i]);
2303 EXPORT_SYMBOL_GPL(snd_soc_register_dais);
2306 * snd_soc_unregister_dais - Unregister multiple DAIs from the ASoC core
2308 * @dai: Array of DAIs to unregister
2309 * @count: Number of DAIs
2311 void snd_soc_unregister_dais(struct snd_soc_dai *dai, size_t count)
2315 for (i = 0; i < count; i++)
2316 snd_soc_unregister_dai(&dai[i]);
2318 EXPORT_SYMBOL_GPL(snd_soc_unregister_dais);
2321 * snd_soc_register_platform - Register a platform with the ASoC core
2323 * @platform: platform to register
2325 int snd_soc_register_platform(struct snd_soc_platform *platform)
2327 if (!platform->name)
2330 INIT_LIST_HEAD(&platform->list);
2332 mutex_lock(&client_mutex);
2333 list_add(&platform->list, &platform_list);
2334 snd_soc_instantiate_cards();
2335 mutex_unlock(&client_mutex);
2337 pr_debug("Registered platform '%s'\n", platform->name);
2341 EXPORT_SYMBOL_GPL(snd_soc_register_platform);
2344 * snd_soc_unregister_platform - Unregister a platform from the ASoC core
2346 * @platform: platform to unregister
2348 void snd_soc_unregister_platform(struct snd_soc_platform *platform)
2350 mutex_lock(&client_mutex);
2351 list_del(&platform->list);
2352 mutex_unlock(&client_mutex);
2354 pr_debug("Unregistered platform '%s'\n", platform->name);
2356 EXPORT_SYMBOL_GPL(snd_soc_unregister_platform);
2358 static u64 codec_format_map[] = {
2359 SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S16_BE,
2360 SNDRV_PCM_FMTBIT_U16_LE | SNDRV_PCM_FMTBIT_U16_BE,
2361 SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S24_BE,
2362 SNDRV_PCM_FMTBIT_U24_LE | SNDRV_PCM_FMTBIT_U24_BE,
2363 SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_S32_BE,
2364 SNDRV_PCM_FMTBIT_U32_LE | SNDRV_PCM_FMTBIT_U32_BE,
2365 SNDRV_PCM_FMTBIT_S24_3LE | SNDRV_PCM_FMTBIT_U24_3BE,
2366 SNDRV_PCM_FMTBIT_U24_3LE | SNDRV_PCM_FMTBIT_U24_3BE,
2367 SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S20_3BE,
2368 SNDRV_PCM_FMTBIT_U20_3LE | SNDRV_PCM_FMTBIT_U20_3BE,
2369 SNDRV_PCM_FMTBIT_S18_3LE | SNDRV_PCM_FMTBIT_S18_3BE,
2370 SNDRV_PCM_FMTBIT_U18_3LE | SNDRV_PCM_FMTBIT_U18_3BE,
2371 SNDRV_PCM_FMTBIT_FLOAT_LE | SNDRV_PCM_FMTBIT_FLOAT_BE,
2372 SNDRV_PCM_FMTBIT_FLOAT64_LE | SNDRV_PCM_FMTBIT_FLOAT64_BE,
2373 SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE
2374 | SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_BE,
2377 /* Fix up the DAI formats for endianness: codecs don't actually see
2378 * the endianness of the data but we're using the CPU format
2379 * definitions which do need to include endianness so we ensure that
2380 * codec DAIs always have both big and little endian variants set.
2382 static void fixup_codec_formats(struct snd_soc_pcm_stream *stream)
2386 for (i = 0; i < ARRAY_SIZE(codec_format_map); i++)
2387 if (stream->formats & codec_format_map[i])
2388 stream->formats |= codec_format_map[i];
2392 * snd_soc_register_codec - Register a codec with the ASoC core
2394 * @codec: codec to register
2396 int snd_soc_register_codec(struct snd_soc_codec *codec)
2403 /* The device should become mandatory over time */
2405 printk(KERN_WARNING "No device for codec %s\n", codec->name);
2407 INIT_LIST_HEAD(&codec->list);
2409 for (i = 0; i < codec->num_dai; i++) {
2410 fixup_codec_formats(&codec->dai[i].playback);
2411 fixup_codec_formats(&codec->dai[i].capture);
2414 mutex_lock(&client_mutex);
2415 list_add(&codec->list, &codec_list);
2416 snd_soc_instantiate_cards();
2417 mutex_unlock(&client_mutex);
2419 pr_debug("Registered codec '%s'\n", codec->name);
2423 EXPORT_SYMBOL_GPL(snd_soc_register_codec);
2426 * snd_soc_unregister_codec - Unregister a codec from the ASoC core
2428 * @codec: codec to unregister
2430 void snd_soc_unregister_codec(struct snd_soc_codec *codec)
2432 mutex_lock(&client_mutex);
2433 list_del(&codec->list);
2434 mutex_unlock(&client_mutex);
2436 pr_debug("Unregistered codec '%s'\n", codec->name);
2438 EXPORT_SYMBOL_GPL(snd_soc_unregister_codec);
2440 static int __init snd_soc_init(void)
2442 #ifdef CONFIG_DEBUG_FS
2443 debugfs_root = debugfs_create_dir("asoc", NULL);
2444 if (IS_ERR(debugfs_root) || !debugfs_root) {
2446 "ASoC: Failed to create debugfs directory\n");
2447 debugfs_root = NULL;
2451 return platform_driver_register(&soc_driver);
2454 static void __exit snd_soc_exit(void)
2456 #ifdef CONFIG_DEBUG_FS
2457 debugfs_remove_recursive(debugfs_root);
2459 platform_driver_unregister(&soc_driver);
2462 module_init(snd_soc_init);
2463 module_exit(snd_soc_exit);
2465 /* Module information */
2466 MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
2467 MODULE_DESCRIPTION("ALSA SoC Core");
2468 MODULE_LICENSE("GPL");
2469 MODULE_ALIAS("platform:soc-audio");