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/ac97_codec.h>
32 #include <sound/core.h>
33 #include <sound/pcm.h>
34 #include <sound/pcm_params.h>
35 #include <sound/soc.h>
36 #include <sound/soc-dapm.h>
37 #include <sound/initval.h>
39 static DEFINE_MUTEX(pcm_mutex);
40 static DEFINE_MUTEX(io_mutex);
41 static DECLARE_WAIT_QUEUE_HEAD(soc_pm_waitq);
43 #ifdef CONFIG_DEBUG_FS
44 static struct dentry *debugfs_root;
47 static DEFINE_MUTEX(client_mutex);
48 static LIST_HEAD(card_list);
49 static LIST_HEAD(dai_list);
50 static LIST_HEAD(platform_list);
51 static LIST_HEAD(codec_list);
53 static int snd_soc_register_card(struct snd_soc_card *card);
54 static int snd_soc_unregister_card(struct snd_soc_card *card);
57 * This is a timeout to do a DAPM powerdown after a stream is closed().
58 * It can be used to eliminate pops between different playback streams, e.g.
59 * between two audio tracks.
61 static int pmdown_time = 5000;
62 module_param(pmdown_time, int, 0);
63 MODULE_PARM_DESC(pmdown_time, "DAPM stream powerdown time (msecs)");
66 * This function forces any delayed work to be queued and run.
68 static int run_delayed_work(struct delayed_work *dwork)
72 /* cancel any work waiting to be queued. */
73 ret = cancel_delayed_work(dwork);
75 /* if there was any work waiting then we run it now and
76 * wait for it's completion */
78 schedule_delayed_work(dwork, 0);
79 flush_scheduled_work();
84 #ifdef CONFIG_SND_SOC_AC97_BUS
85 /* unregister ac97 codec */
86 static int soc_ac97_dev_unregister(struct snd_soc_codec *codec)
88 if (codec->ac97->dev.bus)
89 device_unregister(&codec->ac97->dev);
93 /* stop no dev release warning */
94 static void soc_ac97_device_release(struct device *dev){}
96 /* register ac97 codec to bus */
97 static int soc_ac97_dev_register(struct snd_soc_codec *codec)
101 codec->ac97->dev.bus = &ac97_bus_type;
102 codec->ac97->dev.parent = codec->card->dev;
103 codec->ac97->dev.release = soc_ac97_device_release;
105 dev_set_name(&codec->ac97->dev, "%d-%d:%s",
106 codec->card->number, 0, codec->name);
107 err = device_register(&codec->ac97->dev);
109 snd_printk(KERN_ERR "Can't register ac97 bus\n");
110 codec->ac97->dev.bus = NULL;
117 static int soc_pcm_apply_symmetry(struct snd_pcm_substream *substream)
119 struct snd_soc_pcm_runtime *rtd = substream->private_data;
120 struct snd_soc_device *socdev = rtd->socdev;
121 struct snd_soc_card *card = socdev->card;
122 struct snd_soc_dai_link *machine = rtd->dai;
123 struct snd_soc_dai *cpu_dai = machine->cpu_dai;
124 struct snd_soc_dai *codec_dai = machine->codec_dai;
127 if (codec_dai->symmetric_rates || cpu_dai->symmetric_rates ||
128 machine->symmetric_rates) {
129 dev_dbg(card->dev, "Symmetry forces %dHz rate\n",
132 ret = snd_pcm_hw_constraint_minmax(substream->runtime,
133 SNDRV_PCM_HW_PARAM_RATE,
138 "Unable to apply rate symmetry constraint: %d\n", ret);
147 * Called by ALSA when a PCM substream is opened, the runtime->hw record is
148 * then initialized and any private data can be allocated. This also calls
149 * startup for the cpu DAI, platform, machine and codec DAI.
151 static int soc_pcm_open(struct snd_pcm_substream *substream)
153 struct snd_soc_pcm_runtime *rtd = substream->private_data;
154 struct snd_soc_device *socdev = rtd->socdev;
155 struct snd_soc_card *card = socdev->card;
156 struct snd_pcm_runtime *runtime = substream->runtime;
157 struct snd_soc_dai_link *machine = rtd->dai;
158 struct snd_soc_platform *platform = card->platform;
159 struct snd_soc_dai *cpu_dai = machine->cpu_dai;
160 struct snd_soc_dai *codec_dai = machine->codec_dai;
163 mutex_lock(&pcm_mutex);
165 /* startup the audio subsystem */
166 if (cpu_dai->ops->startup) {
167 ret = cpu_dai->ops->startup(substream, cpu_dai);
169 printk(KERN_ERR "asoc: can't open interface %s\n",
175 if (platform->pcm_ops->open) {
176 ret = platform->pcm_ops->open(substream);
178 printk(KERN_ERR "asoc: can't open platform %s\n", platform->name);
183 if (codec_dai->ops->startup) {
184 ret = codec_dai->ops->startup(substream, codec_dai);
186 printk(KERN_ERR "asoc: can't open codec %s\n",
192 if (machine->ops && machine->ops->startup) {
193 ret = machine->ops->startup(substream);
195 printk(KERN_ERR "asoc: %s startup failed\n", machine->name);
200 /* Check that the codec and cpu DAI's are compatible */
201 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
202 runtime->hw.rate_min =
203 max(codec_dai->playback.rate_min,
204 cpu_dai->playback.rate_min);
205 runtime->hw.rate_max =
206 min(codec_dai->playback.rate_max,
207 cpu_dai->playback.rate_max);
208 runtime->hw.channels_min =
209 max(codec_dai->playback.channels_min,
210 cpu_dai->playback.channels_min);
211 runtime->hw.channels_max =
212 min(codec_dai->playback.channels_max,
213 cpu_dai->playback.channels_max);
214 runtime->hw.formats =
215 codec_dai->playback.formats & cpu_dai->playback.formats;
217 codec_dai->playback.rates & cpu_dai->playback.rates;
219 runtime->hw.rate_min =
220 max(codec_dai->capture.rate_min,
221 cpu_dai->capture.rate_min);
222 runtime->hw.rate_max =
223 min(codec_dai->capture.rate_max,
224 cpu_dai->capture.rate_max);
225 runtime->hw.channels_min =
226 max(codec_dai->capture.channels_min,
227 cpu_dai->capture.channels_min);
228 runtime->hw.channels_max =
229 min(codec_dai->capture.channels_max,
230 cpu_dai->capture.channels_max);
231 runtime->hw.formats =
232 codec_dai->capture.formats & cpu_dai->capture.formats;
234 codec_dai->capture.rates & cpu_dai->capture.rates;
237 snd_pcm_limit_hw_rates(runtime);
238 if (!runtime->hw.rates) {
239 printk(KERN_ERR "asoc: %s <-> %s No matching rates\n",
240 codec_dai->name, cpu_dai->name);
243 if (!runtime->hw.formats) {
244 printk(KERN_ERR "asoc: %s <-> %s No matching formats\n",
245 codec_dai->name, cpu_dai->name);
248 if (!runtime->hw.channels_min || !runtime->hw.channels_max) {
249 printk(KERN_ERR "asoc: %s <-> %s No matching channels\n",
250 codec_dai->name, cpu_dai->name);
254 /* Symmetry only applies if we've already got an active stream. */
255 if (cpu_dai->active || codec_dai->active) {
256 ret = soc_pcm_apply_symmetry(substream);
261 pr_debug("asoc: %s <-> %s info:\n", codec_dai->name, cpu_dai->name);
262 pr_debug("asoc: rate mask 0x%x\n", runtime->hw.rates);
263 pr_debug("asoc: min ch %d max ch %d\n", runtime->hw.channels_min,
264 runtime->hw.channels_max);
265 pr_debug("asoc: min rate %d max rate %d\n", runtime->hw.rate_min,
266 runtime->hw.rate_max);
268 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
269 cpu_dai->playback.active = codec_dai->playback.active = 1;
271 cpu_dai->capture.active = codec_dai->capture.active = 1;
272 cpu_dai->active = codec_dai->active = 1;
273 cpu_dai->runtime = runtime;
274 card->codec->active++;
275 mutex_unlock(&pcm_mutex);
279 if (machine->ops && machine->ops->shutdown)
280 machine->ops->shutdown(substream);
283 if (platform->pcm_ops->close)
284 platform->pcm_ops->close(substream);
287 if (cpu_dai->ops->shutdown)
288 cpu_dai->ops->shutdown(substream, cpu_dai);
290 mutex_unlock(&pcm_mutex);
295 * Power down the audio subsystem pmdown_time msecs after close is called.
296 * This is to ensure there are no pops or clicks in between any music tracks
297 * due to DAPM power cycling.
299 static void close_delayed_work(struct work_struct *work)
301 struct snd_soc_card *card = container_of(work, struct snd_soc_card,
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) {
318 codec_dai->pop_wait = 0;
319 snd_soc_dapm_stream_event(codec,
320 codec_dai->playback.stream_name,
321 SND_SOC_DAPM_STREAM_STOP);
324 mutex_unlock(&pcm_mutex);
328 * Called by ALSA when a PCM substream is closed. Private data can be
329 * freed here. The cpu DAI, codec DAI, machine and platform are also
332 static int soc_codec_close(struct snd_pcm_substream *substream)
334 struct snd_soc_pcm_runtime *rtd = substream->private_data;
335 struct snd_soc_device *socdev = rtd->socdev;
336 struct snd_soc_card *card = socdev->card;
337 struct snd_soc_dai_link *machine = rtd->dai;
338 struct snd_soc_platform *platform = card->platform;
339 struct snd_soc_dai *cpu_dai = machine->cpu_dai;
340 struct snd_soc_dai *codec_dai = machine->codec_dai;
341 struct snd_soc_codec *codec = card->codec;
343 mutex_lock(&pcm_mutex);
345 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
346 cpu_dai->playback.active = codec_dai->playback.active = 0;
348 cpu_dai->capture.active = codec_dai->capture.active = 0;
350 if (codec_dai->playback.active == 0 &&
351 codec_dai->capture.active == 0) {
352 cpu_dai->active = codec_dai->active = 0;
356 /* Muting the DAC suppresses artifacts caused during digital
357 * shutdown, for example from stopping clocks.
359 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
360 snd_soc_dai_digital_mute(codec_dai, 1);
362 if (cpu_dai->ops->shutdown)
363 cpu_dai->ops->shutdown(substream, cpu_dai);
365 if (codec_dai->ops->shutdown)
366 codec_dai->ops->shutdown(substream, codec_dai);
368 if (machine->ops && machine->ops->shutdown)
369 machine->ops->shutdown(substream);
371 if (platform->pcm_ops->close)
372 platform->pcm_ops->close(substream);
373 cpu_dai->runtime = NULL;
375 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
376 /* start delayed pop wq here for playback streams */
377 codec_dai->pop_wait = 1;
378 schedule_delayed_work(&card->delayed_work,
379 msecs_to_jiffies(pmdown_time));
381 /* capture streams can be powered down now */
382 snd_soc_dapm_stream_event(codec,
383 codec_dai->capture.stream_name,
384 SND_SOC_DAPM_STREAM_STOP);
387 mutex_unlock(&pcm_mutex);
392 * Called by ALSA when the PCM substream is prepared, can set format, sample
393 * rate, etc. This function is non atomic and can be called multiple times,
394 * it can refer to the runtime info.
396 static int soc_pcm_prepare(struct snd_pcm_substream *substream)
398 struct snd_soc_pcm_runtime *rtd = substream->private_data;
399 struct snd_soc_device *socdev = rtd->socdev;
400 struct snd_soc_card *card = socdev->card;
401 struct snd_soc_dai_link *machine = rtd->dai;
402 struct snd_soc_platform *platform = card->platform;
403 struct snd_soc_dai *cpu_dai = machine->cpu_dai;
404 struct snd_soc_dai *codec_dai = machine->codec_dai;
405 struct snd_soc_codec *codec = card->codec;
408 mutex_lock(&pcm_mutex);
410 if (machine->ops && machine->ops->prepare) {
411 ret = machine->ops->prepare(substream);
413 printk(KERN_ERR "asoc: machine prepare error\n");
418 if (platform->pcm_ops->prepare) {
419 ret = platform->pcm_ops->prepare(substream);
421 printk(KERN_ERR "asoc: platform prepare error\n");
426 if (codec_dai->ops->prepare) {
427 ret = codec_dai->ops->prepare(substream, codec_dai);
429 printk(KERN_ERR "asoc: codec DAI prepare error\n");
434 if (cpu_dai->ops->prepare) {
435 ret = cpu_dai->ops->prepare(substream, cpu_dai);
437 printk(KERN_ERR "asoc: cpu DAI prepare error\n");
442 /* cancel any delayed stream shutdown that is pending */
443 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
444 codec_dai->pop_wait) {
445 codec_dai->pop_wait = 0;
446 cancel_delayed_work(&card->delayed_work);
449 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
450 snd_soc_dapm_stream_event(codec,
451 codec_dai->playback.stream_name,
452 SND_SOC_DAPM_STREAM_START);
454 snd_soc_dapm_stream_event(codec,
455 codec_dai->capture.stream_name,
456 SND_SOC_DAPM_STREAM_START);
458 snd_soc_dai_digital_mute(codec_dai, 0);
461 mutex_unlock(&pcm_mutex);
466 * Called by ALSA when the hardware params are set by application. This
467 * function can also be called multiple times and can allocate buffers
468 * (using snd_pcm_lib_* ). It's non-atomic.
470 static int soc_pcm_hw_params(struct snd_pcm_substream *substream,
471 struct snd_pcm_hw_params *params)
473 struct snd_soc_pcm_runtime *rtd = substream->private_data;
474 struct snd_soc_device *socdev = rtd->socdev;
475 struct snd_soc_dai_link *machine = rtd->dai;
476 struct snd_soc_card *card = socdev->card;
477 struct snd_soc_platform *platform = card->platform;
478 struct snd_soc_dai *cpu_dai = machine->cpu_dai;
479 struct snd_soc_dai *codec_dai = machine->codec_dai;
482 mutex_lock(&pcm_mutex);
484 if (machine->ops && machine->ops->hw_params) {
485 ret = machine->ops->hw_params(substream, params);
487 printk(KERN_ERR "asoc: machine hw_params failed\n");
492 if (codec_dai->ops->hw_params) {
493 ret = codec_dai->ops->hw_params(substream, params, codec_dai);
495 printk(KERN_ERR "asoc: can't set codec %s hw params\n",
501 if (cpu_dai->ops->hw_params) {
502 ret = cpu_dai->ops->hw_params(substream, params, cpu_dai);
504 printk(KERN_ERR "asoc: interface %s hw params failed\n",
510 if (platform->pcm_ops->hw_params) {
511 ret = platform->pcm_ops->hw_params(substream, params);
513 printk(KERN_ERR "asoc: platform %s hw params failed\n",
519 machine->rate = params_rate(params);
522 mutex_unlock(&pcm_mutex);
526 if (cpu_dai->ops->hw_free)
527 cpu_dai->ops->hw_free(substream, cpu_dai);
530 if (codec_dai->ops->hw_free)
531 codec_dai->ops->hw_free(substream, codec_dai);
534 if (machine->ops && machine->ops->hw_free)
535 machine->ops->hw_free(substream);
537 mutex_unlock(&pcm_mutex);
542 * Free's resources allocated by hw_params, can be called multiple times
544 static int soc_pcm_hw_free(struct snd_pcm_substream *substream)
546 struct snd_soc_pcm_runtime *rtd = substream->private_data;
547 struct snd_soc_device *socdev = rtd->socdev;
548 struct snd_soc_dai_link *machine = rtd->dai;
549 struct snd_soc_card *card = socdev->card;
550 struct snd_soc_platform *platform = card->platform;
551 struct snd_soc_dai *cpu_dai = machine->cpu_dai;
552 struct snd_soc_dai *codec_dai = machine->codec_dai;
553 struct snd_soc_codec *codec = card->codec;
555 mutex_lock(&pcm_mutex);
557 /* apply codec digital mute */
559 snd_soc_dai_digital_mute(codec_dai, 1);
561 /* free any machine hw params */
562 if (machine->ops && machine->ops->hw_free)
563 machine->ops->hw_free(substream);
565 /* free any DMA resources */
566 if (platform->pcm_ops->hw_free)
567 platform->pcm_ops->hw_free(substream);
569 /* now free hw params for the DAI's */
570 if (codec_dai->ops->hw_free)
571 codec_dai->ops->hw_free(substream, codec_dai);
573 if (cpu_dai->ops->hw_free)
574 cpu_dai->ops->hw_free(substream, cpu_dai);
576 mutex_unlock(&pcm_mutex);
580 static int soc_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
582 struct snd_soc_pcm_runtime *rtd = substream->private_data;
583 struct snd_soc_device *socdev = rtd->socdev;
584 struct snd_soc_card *card= socdev->card;
585 struct snd_soc_dai_link *machine = rtd->dai;
586 struct snd_soc_platform *platform = card->platform;
587 struct snd_soc_dai *cpu_dai = machine->cpu_dai;
588 struct snd_soc_dai *codec_dai = machine->codec_dai;
591 if (codec_dai->ops->trigger) {
592 ret = codec_dai->ops->trigger(substream, cmd, codec_dai);
597 if (platform->pcm_ops->trigger) {
598 ret = platform->pcm_ops->trigger(substream, cmd);
603 if (cpu_dai->ops->trigger) {
604 ret = cpu_dai->ops->trigger(substream, cmd, cpu_dai);
611 /* ASoC PCM operations */
612 static struct snd_pcm_ops soc_pcm_ops = {
613 .open = soc_pcm_open,
614 .close = soc_codec_close,
615 .hw_params = soc_pcm_hw_params,
616 .hw_free = soc_pcm_hw_free,
617 .prepare = soc_pcm_prepare,
618 .trigger = soc_pcm_trigger,
622 /* powers down audio subsystem for suspend */
623 static int soc_suspend(struct device *dev)
625 struct platform_device *pdev = to_platform_device(dev);
626 struct snd_soc_device *socdev = platform_get_drvdata(pdev);
627 struct snd_soc_card *card = socdev->card;
628 struct snd_soc_platform *platform = card->platform;
629 struct snd_soc_codec_device *codec_dev = socdev->codec_dev;
630 struct snd_soc_codec *codec = card->codec;
633 /* If the initialization of this soc device failed, there is no codec
634 * associated with it. Just bail out in this case.
639 /* Due to the resume being scheduled into a workqueue we could
640 * suspend before that's finished - wait for it to complete.
642 snd_power_lock(codec->card);
643 snd_power_wait(codec->card, SNDRV_CTL_POWER_D0);
644 snd_power_unlock(codec->card);
646 /* we're going to block userspace touching us until resume completes */
647 snd_power_change_state(codec->card, SNDRV_CTL_POWER_D3hot);
649 /* mute any active DAC's */
650 for (i = 0; i < card->num_links; i++) {
651 struct snd_soc_dai *dai = card->dai_link[i].codec_dai;
652 if (dai->ops->digital_mute && dai->playback.active)
653 dai->ops->digital_mute(dai, 1);
656 /* suspend all pcms */
657 for (i = 0; i < card->num_links; i++)
658 snd_pcm_suspend_all(card->dai_link[i].pcm);
660 if (card->suspend_pre)
661 card->suspend_pre(pdev, PMSG_SUSPEND);
663 for (i = 0; i < card->num_links; i++) {
664 struct snd_soc_dai *cpu_dai = card->dai_link[i].cpu_dai;
665 if (cpu_dai->suspend && !cpu_dai->ac97_control)
666 cpu_dai->suspend(cpu_dai);
667 if (platform->suspend)
668 platform->suspend(cpu_dai);
671 /* close any waiting streams and save state */
672 run_delayed_work(&card->delayed_work);
673 codec->suspend_bias_level = codec->bias_level;
675 for (i = 0; i < codec->num_dai; i++) {
676 char *stream = codec->dai[i].playback.stream_name;
678 snd_soc_dapm_stream_event(codec, stream,
679 SND_SOC_DAPM_STREAM_SUSPEND);
680 stream = codec->dai[i].capture.stream_name;
682 snd_soc_dapm_stream_event(codec, stream,
683 SND_SOC_DAPM_STREAM_SUSPEND);
686 if (codec_dev->suspend)
687 codec_dev->suspend(pdev, PMSG_SUSPEND);
689 for (i = 0; i < card->num_links; i++) {
690 struct snd_soc_dai *cpu_dai = card->dai_link[i].cpu_dai;
691 if (cpu_dai->suspend && cpu_dai->ac97_control)
692 cpu_dai->suspend(cpu_dai);
695 if (card->suspend_post)
696 card->suspend_post(pdev, PMSG_SUSPEND);
701 /* deferred resume work, so resume can complete before we finished
702 * setting our codec back up, which can be very slow on I2C
704 static void soc_resume_deferred(struct work_struct *work)
706 struct snd_soc_card *card = container_of(work,
708 deferred_resume_work);
709 struct snd_soc_device *socdev = card->socdev;
710 struct snd_soc_platform *platform = card->platform;
711 struct snd_soc_codec_device *codec_dev = socdev->codec_dev;
712 struct snd_soc_codec *codec = card->codec;
713 struct platform_device *pdev = to_platform_device(socdev->dev);
716 /* our power state is still SNDRV_CTL_POWER_D3hot from suspend time,
717 * so userspace apps are blocked from touching us
720 dev_dbg(socdev->dev, "starting resume work\n");
722 if (card->resume_pre)
723 card->resume_pre(pdev);
725 for (i = 0; i < card->num_links; i++) {
726 struct snd_soc_dai *cpu_dai = card->dai_link[i].cpu_dai;
727 if (cpu_dai->resume && cpu_dai->ac97_control)
728 cpu_dai->resume(cpu_dai);
731 if (codec_dev->resume)
732 codec_dev->resume(pdev);
734 for (i = 0; i < codec->num_dai; i++) {
735 char *stream = codec->dai[i].playback.stream_name;
737 snd_soc_dapm_stream_event(codec, stream,
738 SND_SOC_DAPM_STREAM_RESUME);
739 stream = codec->dai[i].capture.stream_name;
741 snd_soc_dapm_stream_event(codec, stream,
742 SND_SOC_DAPM_STREAM_RESUME);
745 /* unmute any active DACs */
746 for (i = 0; i < card->num_links; i++) {
747 struct snd_soc_dai *dai = card->dai_link[i].codec_dai;
748 if (dai->ops->digital_mute && dai->playback.active)
749 dai->ops->digital_mute(dai, 0);
752 for (i = 0; i < card->num_links; i++) {
753 struct snd_soc_dai *cpu_dai = card->dai_link[i].cpu_dai;
754 if (cpu_dai->resume && !cpu_dai->ac97_control)
755 cpu_dai->resume(cpu_dai);
756 if (platform->resume)
757 platform->resume(cpu_dai);
760 if (card->resume_post)
761 card->resume_post(pdev);
763 dev_dbg(socdev->dev, "resume work completed\n");
765 /* userspace can access us now we are back as we were before */
766 snd_power_change_state(codec->card, SNDRV_CTL_POWER_D0);
769 /* powers up audio subsystem after a suspend */
770 static int soc_resume(struct device *dev)
772 struct platform_device *pdev = to_platform_device(dev);
773 struct snd_soc_device *socdev = platform_get_drvdata(pdev);
774 struct snd_soc_card *card = socdev->card;
775 struct snd_soc_dai *cpu_dai = card->dai_link[0].cpu_dai;
777 /* AC97 devices might have other drivers hanging off them so
778 * need to resume immediately. Other drivers don't have that
779 * problem and may take a substantial amount of time to resume
780 * due to I/O costs and anti-pop so handle them out of line.
782 if (cpu_dai->ac97_control) {
783 dev_dbg(socdev->dev, "Resuming AC97 immediately\n");
784 soc_resume_deferred(&card->deferred_resume_work);
786 dev_dbg(socdev->dev, "Scheduling resume work\n");
787 if (!schedule_work(&card->deferred_resume_work))
788 dev_err(socdev->dev, "resume work item may be lost\n");
795 * snd_soc_suspend_device: Notify core of device suspend
797 * @dev: Device being suspended.
799 * In order to ensure that the entire audio subsystem is suspended in a
800 * coordinated fashion ASoC devices should suspend themselves when
801 * called by ASoC. When the standard kernel suspend process asks the
802 * device to suspend it should call this function to initiate a suspend
803 * of the entire ASoC card.
805 * \note Currently this function is stubbed out.
807 int snd_soc_suspend_device(struct device *dev)
811 EXPORT_SYMBOL_GPL(snd_soc_suspend_device);
814 * snd_soc_resume_device: Notify core of device resume
816 * @dev: Device being resumed.
818 * In order to ensure that the entire audio subsystem is resumed in a
819 * coordinated fashion ASoC devices should resume themselves when called
820 * by ASoC. When the standard kernel resume process asks the device
821 * to resume it should call this function. Once all the components of
822 * the card have notified that they are ready to be resumed the card
825 * \note Currently this function is stubbed out.
827 int snd_soc_resume_device(struct device *dev)
831 EXPORT_SYMBOL_GPL(snd_soc_resume_device);
833 #define soc_suspend NULL
834 #define soc_resume NULL
837 static void snd_soc_instantiate_card(struct snd_soc_card *card)
839 struct platform_device *pdev = container_of(card->dev,
840 struct platform_device,
842 struct snd_soc_codec_device *codec_dev = card->socdev->codec_dev;
843 struct snd_soc_platform *platform;
844 struct snd_soc_dai *dai;
845 int i, found, ret, ac97;
847 if (card->instantiated)
851 list_for_each_entry(platform, &platform_list, list)
852 if (card->platform == platform) {
857 dev_dbg(card->dev, "Platform %s not registered\n",
858 card->platform->name);
863 for (i = 0; i < card->num_links; i++) {
865 list_for_each_entry(dai, &dai_list, list)
866 if (card->dai_link[i].cpu_dai == dai) {
871 dev_dbg(card->dev, "DAI %s not registered\n",
872 card->dai_link[i].cpu_dai->name);
876 if (card->dai_link[i].cpu_dai->ac97_control)
880 /* If we have AC97 in the system then don't wait for the
881 * codec. This will need revisiting if we have to handle
882 * systems with mixed AC97 and non-AC97 parts. Only check for
883 * DAIs currently; we can't do this per link since some AC97
884 * codecs have non-AC97 DAIs.
887 for (i = 0; i < card->num_links; i++) {
889 list_for_each_entry(dai, &dai_list, list)
890 if (card->dai_link[i].codec_dai == dai) {
895 dev_dbg(card->dev, "DAI %s not registered\n",
896 card->dai_link[i].codec_dai->name);
901 /* Note that we do not current check for codec components */
903 dev_dbg(card->dev, "All components present, instantiating\n");
905 /* Found everything, bring it up */
907 ret = card->probe(pdev);
912 for (i = 0; i < card->num_links; i++) {
913 struct snd_soc_dai *cpu_dai = card->dai_link[i].cpu_dai;
914 if (cpu_dai->probe) {
915 ret = cpu_dai->probe(pdev, cpu_dai);
921 if (codec_dev->probe) {
922 ret = codec_dev->probe(pdev);
927 if (platform->probe) {
928 ret = platform->probe(pdev);
933 /* DAPM stream work */
934 INIT_DELAYED_WORK(&card->delayed_work, close_delayed_work);
936 /* deferred resume work */
937 INIT_WORK(&card->deferred_resume_work, soc_resume_deferred);
940 card->instantiated = 1;
945 if (codec_dev->remove)
946 codec_dev->remove(pdev);
949 for (i--; i >= 0; i--) {
950 struct snd_soc_dai *cpu_dai = card->dai_link[i].cpu_dai;
952 cpu_dai->remove(pdev, cpu_dai);
960 * Attempt to initialise any uninitalised cards. Must be called with
963 static void snd_soc_instantiate_cards(void)
965 struct snd_soc_card *card;
966 list_for_each_entry(card, &card_list, list)
967 snd_soc_instantiate_card(card);
970 /* probes a new socdev */
971 static int soc_probe(struct platform_device *pdev)
974 struct snd_soc_device *socdev = platform_get_drvdata(pdev);
975 struct snd_soc_card *card = socdev->card;
977 /* Bodge while we push things out of socdev */
978 card->socdev = socdev;
980 /* Bodge while we unpick instantiation */
981 card->dev = &pdev->dev;
982 ret = snd_soc_register_card(card);
984 dev_err(&pdev->dev, "Failed to register card\n");
991 /* removes a socdev */
992 static int soc_remove(struct platform_device *pdev)
995 struct snd_soc_device *socdev = platform_get_drvdata(pdev);
996 struct snd_soc_card *card = socdev->card;
997 struct snd_soc_platform *platform = card->platform;
998 struct snd_soc_codec_device *codec_dev = socdev->codec_dev;
1000 if (!card->instantiated)
1003 run_delayed_work(&card->delayed_work);
1005 if (platform->remove)
1006 platform->remove(pdev);
1008 if (codec_dev->remove)
1009 codec_dev->remove(pdev);
1011 for (i = 0; i < card->num_links; i++) {
1012 struct snd_soc_dai *cpu_dai = card->dai_link[i].cpu_dai;
1013 if (cpu_dai->remove)
1014 cpu_dai->remove(pdev, cpu_dai);
1020 snd_soc_unregister_card(card);
1025 static int soc_poweroff(struct device *dev)
1027 struct platform_device *pdev = to_platform_device(dev);
1028 struct snd_soc_device *socdev = platform_get_drvdata(pdev);
1029 struct snd_soc_card *card = socdev->card;
1031 if (!card->instantiated)
1034 /* Flush out pmdown_time work - we actually do want to run it
1035 * now, we're shutting down so no imminent restart. */
1036 run_delayed_work(&card->delayed_work);
1038 snd_soc_dapm_shutdown(socdev);
1043 static struct dev_pm_ops soc_pm_ops = {
1044 .suspend = soc_suspend,
1045 .resume = soc_resume,
1046 .poweroff = soc_poweroff,
1049 /* ASoC platform driver */
1050 static struct platform_driver soc_driver = {
1052 .name = "soc-audio",
1053 .owner = THIS_MODULE,
1057 .remove = soc_remove,
1060 /* create a new pcm */
1061 static int soc_new_pcm(struct snd_soc_device *socdev,
1062 struct snd_soc_dai_link *dai_link, int num)
1064 struct snd_soc_card *card = socdev->card;
1065 struct snd_soc_codec *codec = card->codec;
1066 struct snd_soc_platform *platform = card->platform;
1067 struct snd_soc_dai *codec_dai = dai_link->codec_dai;
1068 struct snd_soc_dai *cpu_dai = dai_link->cpu_dai;
1069 struct snd_soc_pcm_runtime *rtd;
1070 struct snd_pcm *pcm;
1072 int ret = 0, playback = 0, capture = 0;
1074 rtd = kzalloc(sizeof(struct snd_soc_pcm_runtime), GFP_KERNEL);
1078 rtd->dai = dai_link;
1079 rtd->socdev = socdev;
1080 codec_dai->codec = card->codec;
1082 /* check client and interface hw capabilities */
1083 sprintf(new_name, "%s %s-%d", dai_link->stream_name, codec_dai->name,
1086 if (codec_dai->playback.channels_min)
1088 if (codec_dai->capture.channels_min)
1091 ret = snd_pcm_new(codec->card, new_name, codec->pcm_devs++, playback,
1094 printk(KERN_ERR "asoc: can't create pcm for codec %s\n",
1100 dai_link->pcm = pcm;
1101 pcm->private_data = rtd;
1102 soc_pcm_ops.mmap = platform->pcm_ops->mmap;
1103 soc_pcm_ops.pointer = platform->pcm_ops->pointer;
1104 soc_pcm_ops.ioctl = platform->pcm_ops->ioctl;
1105 soc_pcm_ops.copy = platform->pcm_ops->copy;
1106 soc_pcm_ops.silence = platform->pcm_ops->silence;
1107 soc_pcm_ops.ack = platform->pcm_ops->ack;
1108 soc_pcm_ops.page = platform->pcm_ops->page;
1111 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &soc_pcm_ops);
1114 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &soc_pcm_ops);
1116 ret = platform->pcm_new(codec->card, codec_dai, pcm);
1118 printk(KERN_ERR "asoc: platform pcm constructor failed\n");
1123 pcm->private_free = platform->pcm_free;
1124 printk(KERN_INFO "asoc: %s <-> %s mapping ok\n", codec_dai->name,
1130 * snd_soc_codec_volatile_register: Report if a register is volatile.
1132 * @codec: CODEC to query.
1133 * @reg: Register to query.
1135 * Boolean function indiciating if a CODEC register is volatile.
1137 int snd_soc_codec_volatile_register(struct snd_soc_codec *codec, int reg)
1139 if (codec->volatile_register)
1140 return codec->volatile_register(reg);
1144 EXPORT_SYMBOL_GPL(snd_soc_codec_volatile_register);
1146 /* codec register dump */
1147 static ssize_t soc_codec_reg_show(struct snd_soc_codec *codec, char *buf)
1149 int i, step = 1, count = 0;
1151 if (!codec->reg_cache_size)
1154 if (codec->reg_cache_step)
1155 step = codec->reg_cache_step;
1157 count += sprintf(buf, "%s registers\n", codec->name);
1158 for (i = 0; i < codec->reg_cache_size; i += step) {
1159 count += sprintf(buf + count, "%2x: ", i);
1160 if (count >= PAGE_SIZE - 1)
1163 if (codec->display_register)
1164 count += codec->display_register(codec, buf + count,
1165 PAGE_SIZE - count, i);
1167 count += snprintf(buf + count, PAGE_SIZE - count,
1168 "%4x", codec->read(codec, i));
1170 if (count >= PAGE_SIZE - 1)
1173 count += snprintf(buf + count, PAGE_SIZE - count, "\n");
1174 if (count >= PAGE_SIZE - 1)
1178 /* Truncate count; min() would cause a warning */
1179 if (count >= PAGE_SIZE)
1180 count = PAGE_SIZE - 1;
1184 static ssize_t codec_reg_show(struct device *dev,
1185 struct device_attribute *attr, char *buf)
1187 struct snd_soc_device *devdata = dev_get_drvdata(dev);
1188 return soc_codec_reg_show(devdata->card->codec, buf);
1191 static DEVICE_ATTR(codec_reg, 0444, codec_reg_show, NULL);
1193 #ifdef CONFIG_DEBUG_FS
1194 static int codec_reg_open_file(struct inode *inode, struct file *file)
1196 file->private_data = inode->i_private;
1200 static ssize_t codec_reg_read_file(struct file *file, char __user *user_buf,
1201 size_t count, loff_t *ppos)
1204 struct snd_soc_codec *codec = file->private_data;
1205 char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
1208 ret = soc_codec_reg_show(codec, buf);
1210 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
1215 static ssize_t codec_reg_write_file(struct file *file,
1216 const char __user *user_buf, size_t count, loff_t *ppos)
1221 unsigned long reg, value;
1223 struct snd_soc_codec *codec = file->private_data;
1225 buf_size = min(count, (sizeof(buf)-1));
1226 if (copy_from_user(buf, user_buf, buf_size))
1230 if (codec->reg_cache_step)
1231 step = codec->reg_cache_step;
1233 while (*start == ' ')
1235 reg = simple_strtoul(start, &start, 16);
1236 if ((reg >= codec->reg_cache_size) || (reg % step))
1238 while (*start == ' ')
1240 if (strict_strtoul(start, 16, &value))
1242 codec->write(codec, reg, value);
1246 static const struct file_operations codec_reg_fops = {
1247 .open = codec_reg_open_file,
1248 .read = codec_reg_read_file,
1249 .write = codec_reg_write_file,
1252 static void soc_init_codec_debugfs(struct snd_soc_codec *codec)
1254 codec->debugfs_reg = debugfs_create_file("codec_reg", 0644,
1255 debugfs_root, codec,
1257 if (!codec->debugfs_reg)
1259 "ASoC: Failed to create codec register debugfs file\n");
1261 codec->debugfs_pop_time = debugfs_create_u32("dapm_pop_time", 0744,
1264 if (!codec->debugfs_pop_time)
1266 "Failed to create pop time debugfs file\n");
1269 static void soc_cleanup_codec_debugfs(struct snd_soc_codec *codec)
1271 debugfs_remove(codec->debugfs_pop_time);
1272 debugfs_remove(codec->debugfs_reg);
1277 static inline void soc_init_codec_debugfs(struct snd_soc_codec *codec)
1281 static inline void soc_cleanup_codec_debugfs(struct snd_soc_codec *codec)
1287 * snd_soc_new_ac97_codec - initailise AC97 device
1288 * @codec: audio codec
1289 * @ops: AC97 bus operations
1290 * @num: AC97 codec number
1292 * Initialises AC97 codec resources for use by ad-hoc devices only.
1294 int snd_soc_new_ac97_codec(struct snd_soc_codec *codec,
1295 struct snd_ac97_bus_ops *ops, int num)
1297 mutex_lock(&codec->mutex);
1299 codec->ac97 = kzalloc(sizeof(struct snd_ac97), GFP_KERNEL);
1300 if (codec->ac97 == NULL) {
1301 mutex_unlock(&codec->mutex);
1305 codec->ac97->bus = kzalloc(sizeof(struct snd_ac97_bus), GFP_KERNEL);
1306 if (codec->ac97->bus == NULL) {
1309 mutex_unlock(&codec->mutex);
1313 codec->ac97->bus->ops = ops;
1314 codec->ac97->num = num;
1315 mutex_unlock(&codec->mutex);
1318 EXPORT_SYMBOL_GPL(snd_soc_new_ac97_codec);
1321 * snd_soc_free_ac97_codec - free AC97 codec device
1322 * @codec: audio codec
1324 * Frees AC97 codec device resources.
1326 void snd_soc_free_ac97_codec(struct snd_soc_codec *codec)
1328 mutex_lock(&codec->mutex);
1329 kfree(codec->ac97->bus);
1332 mutex_unlock(&codec->mutex);
1334 EXPORT_SYMBOL_GPL(snd_soc_free_ac97_codec);
1337 * snd_soc_update_bits - update codec register bits
1338 * @codec: audio codec
1339 * @reg: codec register
1340 * @mask: register mask
1343 * Writes new register value.
1345 * Returns 1 for change else 0.
1347 int snd_soc_update_bits(struct snd_soc_codec *codec, unsigned short reg,
1348 unsigned int mask, unsigned int value)
1351 unsigned int old, new;
1353 mutex_lock(&io_mutex);
1354 old = snd_soc_read(codec, reg);
1355 new = (old & ~mask) | value;
1356 change = old != new;
1358 snd_soc_write(codec, reg, new);
1360 mutex_unlock(&io_mutex);
1363 EXPORT_SYMBOL_GPL(snd_soc_update_bits);
1366 * snd_soc_test_bits - test register for change
1367 * @codec: audio codec
1368 * @reg: codec register
1369 * @mask: register mask
1372 * Tests a register with a new value and checks if the new value is
1373 * different from the old value.
1375 * Returns 1 for change else 0.
1377 int snd_soc_test_bits(struct snd_soc_codec *codec, unsigned short reg,
1378 unsigned int mask, unsigned int value)
1381 unsigned int old, new;
1383 mutex_lock(&io_mutex);
1384 old = snd_soc_read(codec, reg);
1385 new = (old & ~mask) | value;
1386 change = old != new;
1387 mutex_unlock(&io_mutex);
1391 EXPORT_SYMBOL_GPL(snd_soc_test_bits);
1394 * snd_soc_new_pcms - create new sound card and pcms
1395 * @socdev: the SoC audio device
1396 * @idx: ALSA card index
1397 * @xid: card identification
1399 * Create a new sound card based upon the codec and interface pcms.
1401 * Returns 0 for success, else error.
1403 int snd_soc_new_pcms(struct snd_soc_device *socdev, int idx, const char *xid)
1405 struct snd_soc_card *card = socdev->card;
1406 struct snd_soc_codec *codec = card->codec;
1409 mutex_lock(&codec->mutex);
1411 /* register a sound card */
1412 ret = snd_card_create(idx, xid, codec->owner, 0, &codec->card);
1414 printk(KERN_ERR "asoc: can't create sound card for codec %s\n",
1416 mutex_unlock(&codec->mutex);
1420 codec->socdev = socdev;
1421 codec->card->dev = socdev->dev;
1422 codec->card->private_data = codec;
1423 strncpy(codec->card->driver, codec->name, sizeof(codec->card->driver));
1425 /* create the pcms */
1426 for (i = 0; i < card->num_links; i++) {
1427 ret = soc_new_pcm(socdev, &card->dai_link[i], i);
1429 printk(KERN_ERR "asoc: can't create pcm %s\n",
1430 card->dai_link[i].stream_name);
1431 mutex_unlock(&codec->mutex);
1436 mutex_unlock(&codec->mutex);
1439 EXPORT_SYMBOL_GPL(snd_soc_new_pcms);
1442 * snd_soc_init_card - register sound card
1443 * @socdev: the SoC audio device
1445 * Register a SoC sound card. Also registers an AC97 device if the
1446 * codec is AC97 for ad hoc devices.
1448 * Returns 0 for success, else error.
1450 int snd_soc_init_card(struct snd_soc_device *socdev)
1452 struct snd_soc_card *card = socdev->card;
1453 struct snd_soc_codec *codec = card->codec;
1454 int ret = 0, i, ac97 = 0, err = 0;
1456 for (i = 0; i < card->num_links; i++) {
1457 if (card->dai_link[i].init) {
1458 err = card->dai_link[i].init(codec);
1460 printk(KERN_ERR "asoc: failed to init %s\n",
1461 card->dai_link[i].stream_name);
1465 if (card->dai_link[i].codec_dai->ac97_control) {
1467 snd_ac97_dev_add_pdata(codec->ac97,
1468 card->dai_link[i].cpu_dai->ac97_pdata);
1471 snprintf(codec->card->shortname, sizeof(codec->card->shortname),
1473 snprintf(codec->card->longname, sizeof(codec->card->longname),
1474 "%s (%s)", card->name, codec->name);
1476 /* Make sure all DAPM widgets are instantiated */
1477 snd_soc_dapm_new_widgets(codec);
1479 ret = snd_card_register(codec->card);
1481 printk(KERN_ERR "asoc: failed to register soundcard for %s\n",
1486 mutex_lock(&codec->mutex);
1487 #ifdef CONFIG_SND_SOC_AC97_BUS
1488 /* Only instantiate AC97 if not already done by the adaptor
1489 * for the generic AC97 subsystem.
1491 if (ac97 && strcmp(codec->name, "AC97") != 0) {
1492 ret = soc_ac97_dev_register(codec);
1494 printk(KERN_ERR "asoc: AC97 device register failed\n");
1495 snd_card_free(codec->card);
1496 mutex_unlock(&codec->mutex);
1502 err = snd_soc_dapm_sys_add(socdev->dev);
1504 printk(KERN_WARNING "asoc: failed to add dapm sysfs entries\n");
1506 err = device_create_file(socdev->dev, &dev_attr_codec_reg);
1508 printk(KERN_WARNING "asoc: failed to add codec sysfs files\n");
1510 soc_init_codec_debugfs(codec);
1511 mutex_unlock(&codec->mutex);
1516 EXPORT_SYMBOL_GPL(snd_soc_init_card);
1519 * snd_soc_free_pcms - free sound card and pcms
1520 * @socdev: the SoC audio device
1522 * Frees sound card and pcms associated with the socdev.
1523 * Also unregister the codec if it is an AC97 device.
1525 void snd_soc_free_pcms(struct snd_soc_device *socdev)
1527 struct snd_soc_codec *codec = socdev->card->codec;
1528 #ifdef CONFIG_SND_SOC_AC97_BUS
1529 struct snd_soc_dai *codec_dai;
1533 mutex_lock(&codec->mutex);
1534 soc_cleanup_codec_debugfs(codec);
1535 #ifdef CONFIG_SND_SOC_AC97_BUS
1536 for (i = 0; i < codec->num_dai; i++) {
1537 codec_dai = &codec->dai[i];
1538 if (codec_dai->ac97_control && codec->ac97 &&
1539 strcmp(codec->name, "AC97") != 0) {
1540 soc_ac97_dev_unregister(codec);
1548 snd_card_free(codec->card);
1549 device_remove_file(socdev->dev, &dev_attr_codec_reg);
1550 mutex_unlock(&codec->mutex);
1552 EXPORT_SYMBOL_GPL(snd_soc_free_pcms);
1555 * snd_soc_set_runtime_hwparams - set the runtime hardware parameters
1556 * @substream: the pcm substream
1557 * @hw: the hardware parameters
1559 * Sets the substream runtime hardware parameters.
1561 int snd_soc_set_runtime_hwparams(struct snd_pcm_substream *substream,
1562 const struct snd_pcm_hardware *hw)
1564 struct snd_pcm_runtime *runtime = substream->runtime;
1565 runtime->hw.info = hw->info;
1566 runtime->hw.formats = hw->formats;
1567 runtime->hw.period_bytes_min = hw->period_bytes_min;
1568 runtime->hw.period_bytes_max = hw->period_bytes_max;
1569 runtime->hw.periods_min = hw->periods_min;
1570 runtime->hw.periods_max = hw->periods_max;
1571 runtime->hw.buffer_bytes_max = hw->buffer_bytes_max;
1572 runtime->hw.fifo_size = hw->fifo_size;
1575 EXPORT_SYMBOL_GPL(snd_soc_set_runtime_hwparams);
1578 * snd_soc_cnew - create new control
1579 * @_template: control template
1580 * @data: control private data
1581 * @long_name: control long name
1583 * Create a new mixer control from a template control.
1585 * Returns 0 for success, else error.
1587 struct snd_kcontrol *snd_soc_cnew(const struct snd_kcontrol_new *_template,
1588 void *data, char *long_name)
1590 struct snd_kcontrol_new template;
1592 memcpy(&template, _template, sizeof(template));
1594 template.name = long_name;
1597 return snd_ctl_new1(&template, data);
1599 EXPORT_SYMBOL_GPL(snd_soc_cnew);
1602 * snd_soc_add_controls - add an array of controls to a codec.
1603 * Convienience function to add a list of controls. Many codecs were
1604 * duplicating this code.
1606 * @codec: codec to add controls to
1607 * @controls: array of controls to add
1608 * @num_controls: number of elements in the array
1610 * Return 0 for success, else error.
1612 int snd_soc_add_controls(struct snd_soc_codec *codec,
1613 const struct snd_kcontrol_new *controls, int num_controls)
1615 struct snd_card *card = codec->card;
1618 for (i = 0; i < num_controls; i++) {
1619 const struct snd_kcontrol_new *control = &controls[i];
1620 err = snd_ctl_add(card, snd_soc_cnew(control, codec, NULL));
1622 dev_err(codec->dev, "%s: Failed to add %s\n",
1623 codec->name, control->name);
1630 EXPORT_SYMBOL_GPL(snd_soc_add_controls);
1633 * snd_soc_info_enum_double - enumerated double mixer info callback
1634 * @kcontrol: mixer control
1635 * @uinfo: control element information
1637 * Callback to provide information about a double enumerated
1640 * Returns 0 for success.
1642 int snd_soc_info_enum_double(struct snd_kcontrol *kcontrol,
1643 struct snd_ctl_elem_info *uinfo)
1645 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
1647 uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
1648 uinfo->count = e->shift_l == e->shift_r ? 1 : 2;
1649 uinfo->value.enumerated.items = e->max;
1651 if (uinfo->value.enumerated.item > e->max - 1)
1652 uinfo->value.enumerated.item = e->max - 1;
1653 strcpy(uinfo->value.enumerated.name,
1654 e->texts[uinfo->value.enumerated.item]);
1657 EXPORT_SYMBOL_GPL(snd_soc_info_enum_double);
1660 * snd_soc_get_enum_double - enumerated double mixer get callback
1661 * @kcontrol: mixer control
1662 * @ucontrol: control element information
1664 * Callback to get the value of a double enumerated mixer.
1666 * Returns 0 for success.
1668 int snd_soc_get_enum_double(struct snd_kcontrol *kcontrol,
1669 struct snd_ctl_elem_value *ucontrol)
1671 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
1672 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
1673 unsigned int val, bitmask;
1675 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
1677 val = snd_soc_read(codec, e->reg);
1678 ucontrol->value.enumerated.item[0]
1679 = (val >> e->shift_l) & (bitmask - 1);
1680 if (e->shift_l != e->shift_r)
1681 ucontrol->value.enumerated.item[1] =
1682 (val >> e->shift_r) & (bitmask - 1);
1686 EXPORT_SYMBOL_GPL(snd_soc_get_enum_double);
1689 * snd_soc_put_enum_double - enumerated double mixer put callback
1690 * @kcontrol: mixer control
1691 * @ucontrol: control element information
1693 * Callback to set the value of a double enumerated mixer.
1695 * Returns 0 for success.
1697 int snd_soc_put_enum_double(struct snd_kcontrol *kcontrol,
1698 struct snd_ctl_elem_value *ucontrol)
1700 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
1701 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
1703 unsigned int mask, bitmask;
1705 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
1707 if (ucontrol->value.enumerated.item[0] > e->max - 1)
1709 val = ucontrol->value.enumerated.item[0] << e->shift_l;
1710 mask = (bitmask - 1) << e->shift_l;
1711 if (e->shift_l != e->shift_r) {
1712 if (ucontrol->value.enumerated.item[1] > e->max - 1)
1714 val |= ucontrol->value.enumerated.item[1] << e->shift_r;
1715 mask |= (bitmask - 1) << e->shift_r;
1718 return snd_soc_update_bits(codec, e->reg, mask, val);
1720 EXPORT_SYMBOL_GPL(snd_soc_put_enum_double);
1723 * snd_soc_get_value_enum_double - semi enumerated double mixer get callback
1724 * @kcontrol: mixer control
1725 * @ucontrol: control element information
1727 * Callback to get the value of a double semi enumerated mixer.
1729 * Semi enumerated mixer: the enumerated items are referred as values. Can be
1730 * used for handling bitfield coded enumeration for example.
1732 * Returns 0 for success.
1734 int snd_soc_get_value_enum_double(struct snd_kcontrol *kcontrol,
1735 struct snd_ctl_elem_value *ucontrol)
1737 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
1738 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
1739 unsigned int reg_val, val, mux;
1741 reg_val = snd_soc_read(codec, e->reg);
1742 val = (reg_val >> e->shift_l) & e->mask;
1743 for (mux = 0; mux < e->max; mux++) {
1744 if (val == e->values[mux])
1747 ucontrol->value.enumerated.item[0] = mux;
1748 if (e->shift_l != e->shift_r) {
1749 val = (reg_val >> e->shift_r) & e->mask;
1750 for (mux = 0; mux < e->max; mux++) {
1751 if (val == e->values[mux])
1754 ucontrol->value.enumerated.item[1] = mux;
1759 EXPORT_SYMBOL_GPL(snd_soc_get_value_enum_double);
1762 * snd_soc_put_value_enum_double - semi enumerated double mixer put callback
1763 * @kcontrol: mixer control
1764 * @ucontrol: control element information
1766 * Callback to set the value of a double semi enumerated mixer.
1768 * Semi enumerated mixer: the enumerated items are referred as values. Can be
1769 * used for handling bitfield coded enumeration for example.
1771 * Returns 0 for success.
1773 int snd_soc_put_value_enum_double(struct snd_kcontrol *kcontrol,
1774 struct snd_ctl_elem_value *ucontrol)
1776 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
1777 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
1781 if (ucontrol->value.enumerated.item[0] > e->max - 1)
1783 val = e->values[ucontrol->value.enumerated.item[0]] << e->shift_l;
1784 mask = e->mask << e->shift_l;
1785 if (e->shift_l != e->shift_r) {
1786 if (ucontrol->value.enumerated.item[1] > e->max - 1)
1788 val |= e->values[ucontrol->value.enumerated.item[1]] << e->shift_r;
1789 mask |= e->mask << e->shift_r;
1792 return snd_soc_update_bits(codec, e->reg, mask, val);
1794 EXPORT_SYMBOL_GPL(snd_soc_put_value_enum_double);
1797 * snd_soc_info_enum_ext - external enumerated single mixer info callback
1798 * @kcontrol: mixer control
1799 * @uinfo: control element information
1801 * Callback to provide information about an external enumerated
1804 * Returns 0 for success.
1806 int snd_soc_info_enum_ext(struct snd_kcontrol *kcontrol,
1807 struct snd_ctl_elem_info *uinfo)
1809 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
1811 uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
1813 uinfo->value.enumerated.items = e->max;
1815 if (uinfo->value.enumerated.item > e->max - 1)
1816 uinfo->value.enumerated.item = e->max - 1;
1817 strcpy(uinfo->value.enumerated.name,
1818 e->texts[uinfo->value.enumerated.item]);
1821 EXPORT_SYMBOL_GPL(snd_soc_info_enum_ext);
1824 * snd_soc_info_volsw_ext - external single mixer info callback
1825 * @kcontrol: mixer control
1826 * @uinfo: control element information
1828 * Callback to provide information about a single external mixer control.
1830 * Returns 0 for success.
1832 int snd_soc_info_volsw_ext(struct snd_kcontrol *kcontrol,
1833 struct snd_ctl_elem_info *uinfo)
1835 int max = kcontrol->private_value;
1837 if (max == 1 && !strstr(kcontrol->id.name, " Volume"))
1838 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
1840 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
1843 uinfo->value.integer.min = 0;
1844 uinfo->value.integer.max = max;
1847 EXPORT_SYMBOL_GPL(snd_soc_info_volsw_ext);
1850 * snd_soc_info_volsw - single mixer info callback
1851 * @kcontrol: mixer control
1852 * @uinfo: control element information
1854 * Callback to provide information about a single mixer control.
1856 * Returns 0 for success.
1858 int snd_soc_info_volsw(struct snd_kcontrol *kcontrol,
1859 struct snd_ctl_elem_info *uinfo)
1861 struct soc_mixer_control *mc =
1862 (struct soc_mixer_control *)kcontrol->private_value;
1864 unsigned int shift = mc->shift;
1865 unsigned int rshift = mc->rshift;
1867 if (max == 1 && !strstr(kcontrol->id.name, " Volume"))
1868 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
1870 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
1872 uinfo->count = shift == rshift ? 1 : 2;
1873 uinfo->value.integer.min = 0;
1874 uinfo->value.integer.max = max;
1877 EXPORT_SYMBOL_GPL(snd_soc_info_volsw);
1880 * snd_soc_get_volsw - single mixer get callback
1881 * @kcontrol: mixer control
1882 * @ucontrol: control element information
1884 * Callback to get the value of a single mixer control.
1886 * Returns 0 for success.
1888 int snd_soc_get_volsw(struct snd_kcontrol *kcontrol,
1889 struct snd_ctl_elem_value *ucontrol)
1891 struct soc_mixer_control *mc =
1892 (struct soc_mixer_control *)kcontrol->private_value;
1893 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
1894 unsigned int reg = mc->reg;
1895 unsigned int shift = mc->shift;
1896 unsigned int rshift = mc->rshift;
1898 unsigned int mask = (1 << fls(max)) - 1;
1899 unsigned int invert = mc->invert;
1901 ucontrol->value.integer.value[0] =
1902 (snd_soc_read(codec, reg) >> shift) & mask;
1903 if (shift != rshift)
1904 ucontrol->value.integer.value[1] =
1905 (snd_soc_read(codec, reg) >> rshift) & mask;
1907 ucontrol->value.integer.value[0] =
1908 max - ucontrol->value.integer.value[0];
1909 if (shift != rshift)
1910 ucontrol->value.integer.value[1] =
1911 max - ucontrol->value.integer.value[1];
1916 EXPORT_SYMBOL_GPL(snd_soc_get_volsw);
1919 * snd_soc_put_volsw - single mixer put callback
1920 * @kcontrol: mixer control
1921 * @ucontrol: control element information
1923 * Callback to set the value of a single mixer control.
1925 * Returns 0 for success.
1927 int snd_soc_put_volsw(struct snd_kcontrol *kcontrol,
1928 struct snd_ctl_elem_value *ucontrol)
1930 struct soc_mixer_control *mc =
1931 (struct soc_mixer_control *)kcontrol->private_value;
1932 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
1933 unsigned int reg = mc->reg;
1934 unsigned int shift = mc->shift;
1935 unsigned int rshift = mc->rshift;
1937 unsigned int mask = (1 << fls(max)) - 1;
1938 unsigned int invert = mc->invert;
1939 unsigned int val, val2, val_mask;
1941 val = (ucontrol->value.integer.value[0] & mask);
1944 val_mask = mask << shift;
1946 if (shift != rshift) {
1947 val2 = (ucontrol->value.integer.value[1] & mask);
1950 val_mask |= mask << rshift;
1951 val |= val2 << rshift;
1953 return snd_soc_update_bits(codec, reg, val_mask, val);
1955 EXPORT_SYMBOL_GPL(snd_soc_put_volsw);
1958 * snd_soc_info_volsw_2r - double mixer info callback
1959 * @kcontrol: mixer control
1960 * @uinfo: control element information
1962 * Callback to provide information about a double mixer control that
1963 * spans 2 codec registers.
1965 * Returns 0 for success.
1967 int snd_soc_info_volsw_2r(struct snd_kcontrol *kcontrol,
1968 struct snd_ctl_elem_info *uinfo)
1970 struct soc_mixer_control *mc =
1971 (struct soc_mixer_control *)kcontrol->private_value;
1974 if (max == 1 && !strstr(kcontrol->id.name, " Volume"))
1975 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
1977 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
1980 uinfo->value.integer.min = 0;
1981 uinfo->value.integer.max = max;
1984 EXPORT_SYMBOL_GPL(snd_soc_info_volsw_2r);
1987 * snd_soc_get_volsw_2r - double mixer get callback
1988 * @kcontrol: mixer control
1989 * @ucontrol: control element information
1991 * Callback to get the value of a double mixer control that spans 2 registers.
1993 * Returns 0 for success.
1995 int snd_soc_get_volsw_2r(struct snd_kcontrol *kcontrol,
1996 struct snd_ctl_elem_value *ucontrol)
1998 struct soc_mixer_control *mc =
1999 (struct soc_mixer_control *)kcontrol->private_value;
2000 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2001 unsigned int reg = mc->reg;
2002 unsigned int reg2 = mc->rreg;
2003 unsigned int shift = mc->shift;
2005 unsigned int mask = (1 << fls(max)) - 1;
2006 unsigned int invert = mc->invert;
2008 ucontrol->value.integer.value[0] =
2009 (snd_soc_read(codec, reg) >> shift) & mask;
2010 ucontrol->value.integer.value[1] =
2011 (snd_soc_read(codec, reg2) >> shift) & mask;
2013 ucontrol->value.integer.value[0] =
2014 max - ucontrol->value.integer.value[0];
2015 ucontrol->value.integer.value[1] =
2016 max - ucontrol->value.integer.value[1];
2021 EXPORT_SYMBOL_GPL(snd_soc_get_volsw_2r);
2024 * snd_soc_put_volsw_2r - double mixer set callback
2025 * @kcontrol: mixer control
2026 * @ucontrol: control element information
2028 * Callback to set the value of a double mixer control that spans 2 registers.
2030 * Returns 0 for success.
2032 int snd_soc_put_volsw_2r(struct snd_kcontrol *kcontrol,
2033 struct snd_ctl_elem_value *ucontrol)
2035 struct soc_mixer_control *mc =
2036 (struct soc_mixer_control *)kcontrol->private_value;
2037 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2038 unsigned int reg = mc->reg;
2039 unsigned int reg2 = mc->rreg;
2040 unsigned int shift = mc->shift;
2042 unsigned int mask = (1 << fls(max)) - 1;
2043 unsigned int invert = mc->invert;
2045 unsigned int val, val2, val_mask;
2047 val_mask = mask << shift;
2048 val = (ucontrol->value.integer.value[0] & mask);
2049 val2 = (ucontrol->value.integer.value[1] & mask);
2057 val2 = val2 << shift;
2059 err = snd_soc_update_bits(codec, reg, val_mask, val);
2063 err = snd_soc_update_bits(codec, reg2, val_mask, val2);
2066 EXPORT_SYMBOL_GPL(snd_soc_put_volsw_2r);
2069 * snd_soc_info_volsw_s8 - signed mixer info callback
2070 * @kcontrol: mixer control
2071 * @uinfo: control element information
2073 * Callback to provide information about a signed mixer control.
2075 * Returns 0 for success.
2077 int snd_soc_info_volsw_s8(struct snd_kcontrol *kcontrol,
2078 struct snd_ctl_elem_info *uinfo)
2080 struct soc_mixer_control *mc =
2081 (struct soc_mixer_control *)kcontrol->private_value;
2085 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
2087 uinfo->value.integer.min = 0;
2088 uinfo->value.integer.max = max-min;
2091 EXPORT_SYMBOL_GPL(snd_soc_info_volsw_s8);
2094 * snd_soc_get_volsw_s8 - signed mixer get callback
2095 * @kcontrol: mixer control
2096 * @ucontrol: control element information
2098 * Callback to get the value of a signed mixer control.
2100 * Returns 0 for success.
2102 int snd_soc_get_volsw_s8(struct snd_kcontrol *kcontrol,
2103 struct snd_ctl_elem_value *ucontrol)
2105 struct soc_mixer_control *mc =
2106 (struct soc_mixer_control *)kcontrol->private_value;
2107 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2108 unsigned int reg = mc->reg;
2110 int val = snd_soc_read(codec, reg);
2112 ucontrol->value.integer.value[0] =
2113 ((signed char)(val & 0xff))-min;
2114 ucontrol->value.integer.value[1] =
2115 ((signed char)((val >> 8) & 0xff))-min;
2118 EXPORT_SYMBOL_GPL(snd_soc_get_volsw_s8);
2121 * snd_soc_put_volsw_sgn - signed mixer put callback
2122 * @kcontrol: mixer control
2123 * @ucontrol: control element information
2125 * Callback to set the value of a signed mixer control.
2127 * Returns 0 for success.
2129 int snd_soc_put_volsw_s8(struct snd_kcontrol *kcontrol,
2130 struct snd_ctl_elem_value *ucontrol)
2132 struct soc_mixer_control *mc =
2133 (struct soc_mixer_control *)kcontrol->private_value;
2134 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2135 unsigned int reg = mc->reg;
2139 val = (ucontrol->value.integer.value[0]+min) & 0xff;
2140 val |= ((ucontrol->value.integer.value[1]+min) & 0xff) << 8;
2142 return snd_soc_update_bits(codec, reg, 0xffff, val);
2144 EXPORT_SYMBOL_GPL(snd_soc_put_volsw_s8);
2147 * snd_soc_dai_set_sysclk - configure DAI system or master clock.
2149 * @clk_id: DAI specific clock ID
2150 * @freq: new clock frequency in Hz
2151 * @dir: new clock direction - input/output.
2153 * Configures the DAI master (MCLK) or system (SYSCLK) clocking.
2155 int snd_soc_dai_set_sysclk(struct snd_soc_dai *dai, int clk_id,
2156 unsigned int freq, int dir)
2158 if (dai->ops && dai->ops->set_sysclk)
2159 return dai->ops->set_sysclk(dai, clk_id, freq, dir);
2163 EXPORT_SYMBOL_GPL(snd_soc_dai_set_sysclk);
2166 * snd_soc_dai_set_clkdiv - configure DAI clock dividers.
2168 * @div_id: DAI specific clock divider ID
2169 * @div: new clock divisor.
2171 * Configures the clock dividers. This is used to derive the best DAI bit and
2172 * frame clocks from the system or master clock. It's best to set the DAI bit
2173 * and frame clocks as low as possible to save system power.
2175 int snd_soc_dai_set_clkdiv(struct snd_soc_dai *dai,
2176 int div_id, int div)
2178 if (dai->ops && dai->ops->set_clkdiv)
2179 return dai->ops->set_clkdiv(dai, div_id, div);
2183 EXPORT_SYMBOL_GPL(snd_soc_dai_set_clkdiv);
2186 * snd_soc_dai_set_pll - configure DAI PLL.
2188 * @pll_id: DAI specific PLL ID
2189 * @freq_in: PLL input clock frequency in Hz
2190 * @freq_out: requested PLL output clock frequency in Hz
2192 * Configures and enables PLL to generate output clock based on input clock.
2194 int snd_soc_dai_set_pll(struct snd_soc_dai *dai,
2195 int pll_id, unsigned int freq_in, unsigned int freq_out)
2197 if (dai->ops && dai->ops->set_pll)
2198 return dai->ops->set_pll(dai, pll_id, freq_in, freq_out);
2202 EXPORT_SYMBOL_GPL(snd_soc_dai_set_pll);
2205 * snd_soc_dai_set_fmt - configure DAI hardware audio format.
2207 * @fmt: SND_SOC_DAIFMT_ format value.
2209 * Configures the DAI hardware format and clocking.
2211 int snd_soc_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
2213 if (dai->ops && dai->ops->set_fmt)
2214 return dai->ops->set_fmt(dai, fmt);
2218 EXPORT_SYMBOL_GPL(snd_soc_dai_set_fmt);
2221 * snd_soc_dai_set_tdm_slot - configure DAI TDM.
2223 * @mask: DAI specific mask representing used slots.
2224 * @slots: Number of slots in use.
2226 * Configures a DAI for TDM operation. Both mask and slots are codec and DAI
2229 int snd_soc_dai_set_tdm_slot(struct snd_soc_dai *dai,
2230 unsigned int mask, int slots)
2232 if (dai->ops && dai->ops->set_tdm_slot)
2233 return dai->ops->set_tdm_slot(dai, mask, slots);
2237 EXPORT_SYMBOL_GPL(snd_soc_dai_set_tdm_slot);
2240 * snd_soc_dai_set_tristate - configure DAI system or master clock.
2242 * @tristate: tristate enable
2244 * Tristates the DAI so that others can use it.
2246 int snd_soc_dai_set_tristate(struct snd_soc_dai *dai, int tristate)
2248 if (dai->ops && dai->ops->set_tristate)
2249 return dai->ops->set_tristate(dai, tristate);
2253 EXPORT_SYMBOL_GPL(snd_soc_dai_set_tristate);
2256 * snd_soc_dai_digital_mute - configure DAI system or master clock.
2258 * @mute: mute enable
2260 * Mutes the DAI DAC.
2262 int snd_soc_dai_digital_mute(struct snd_soc_dai *dai, int mute)
2264 if (dai->ops && dai->ops->digital_mute)
2265 return dai->ops->digital_mute(dai, mute);
2269 EXPORT_SYMBOL_GPL(snd_soc_dai_digital_mute);
2272 * snd_soc_register_card - Register a card with the ASoC core
2274 * @card: Card to register
2276 * Note that currently this is an internal only function: it will be
2277 * exposed to machine drivers after further backporting of ASoC v2
2278 * registration APIs.
2280 static int snd_soc_register_card(struct snd_soc_card *card)
2282 if (!card->name || !card->dev)
2285 INIT_LIST_HEAD(&card->list);
2286 card->instantiated = 0;
2288 mutex_lock(&client_mutex);
2289 list_add(&card->list, &card_list);
2290 snd_soc_instantiate_cards();
2291 mutex_unlock(&client_mutex);
2293 dev_dbg(card->dev, "Registered card '%s'\n", card->name);
2299 * snd_soc_unregister_card - Unregister a card with the ASoC core
2301 * @card: Card to unregister
2303 * Note that currently this is an internal only function: it will be
2304 * exposed to machine drivers after further backporting of ASoC v2
2305 * registration APIs.
2307 static int snd_soc_unregister_card(struct snd_soc_card *card)
2309 mutex_lock(&client_mutex);
2310 list_del(&card->list);
2311 mutex_unlock(&client_mutex);
2313 dev_dbg(card->dev, "Unregistered card '%s'\n", card->name);
2318 static struct snd_soc_dai_ops null_dai_ops = {
2322 * snd_soc_register_dai - Register a DAI with the ASoC core
2324 * @dai: DAI to register
2326 int snd_soc_register_dai(struct snd_soc_dai *dai)
2331 /* The device should become mandatory over time */
2333 printk(KERN_WARNING "No device for DAI %s\n", dai->name);
2336 dai->ops = &null_dai_ops;
2338 INIT_LIST_HEAD(&dai->list);
2340 mutex_lock(&client_mutex);
2341 list_add(&dai->list, &dai_list);
2342 snd_soc_instantiate_cards();
2343 mutex_unlock(&client_mutex);
2345 pr_debug("Registered DAI '%s'\n", dai->name);
2349 EXPORT_SYMBOL_GPL(snd_soc_register_dai);
2352 * snd_soc_unregister_dai - Unregister a DAI from the ASoC core
2354 * @dai: DAI to unregister
2356 void snd_soc_unregister_dai(struct snd_soc_dai *dai)
2358 mutex_lock(&client_mutex);
2359 list_del(&dai->list);
2360 mutex_unlock(&client_mutex);
2362 pr_debug("Unregistered DAI '%s'\n", dai->name);
2364 EXPORT_SYMBOL_GPL(snd_soc_unregister_dai);
2367 * snd_soc_register_dais - Register multiple DAIs with the ASoC core
2369 * @dai: Array of DAIs to register
2370 * @count: Number of DAIs
2372 int snd_soc_register_dais(struct snd_soc_dai *dai, size_t count)
2376 for (i = 0; i < count; i++) {
2377 ret = snd_soc_register_dai(&dai[i]);
2385 for (i--; i >= 0; i--)
2386 snd_soc_unregister_dai(&dai[i]);
2390 EXPORT_SYMBOL_GPL(snd_soc_register_dais);
2393 * snd_soc_unregister_dais - Unregister multiple DAIs from the ASoC core
2395 * @dai: Array of DAIs to unregister
2396 * @count: Number of DAIs
2398 void snd_soc_unregister_dais(struct snd_soc_dai *dai, size_t count)
2402 for (i = 0; i < count; i++)
2403 snd_soc_unregister_dai(&dai[i]);
2405 EXPORT_SYMBOL_GPL(snd_soc_unregister_dais);
2408 * snd_soc_register_platform - Register a platform with the ASoC core
2410 * @platform: platform to register
2412 int snd_soc_register_platform(struct snd_soc_platform *platform)
2414 if (!platform->name)
2417 INIT_LIST_HEAD(&platform->list);
2419 mutex_lock(&client_mutex);
2420 list_add(&platform->list, &platform_list);
2421 snd_soc_instantiate_cards();
2422 mutex_unlock(&client_mutex);
2424 pr_debug("Registered platform '%s'\n", platform->name);
2428 EXPORT_SYMBOL_GPL(snd_soc_register_platform);
2431 * snd_soc_unregister_platform - Unregister a platform from the ASoC core
2433 * @platform: platform to unregister
2435 void snd_soc_unregister_platform(struct snd_soc_platform *platform)
2437 mutex_lock(&client_mutex);
2438 list_del(&platform->list);
2439 mutex_unlock(&client_mutex);
2441 pr_debug("Unregistered platform '%s'\n", platform->name);
2443 EXPORT_SYMBOL_GPL(snd_soc_unregister_platform);
2445 static u64 codec_format_map[] = {
2446 SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S16_BE,
2447 SNDRV_PCM_FMTBIT_U16_LE | SNDRV_PCM_FMTBIT_U16_BE,
2448 SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S24_BE,
2449 SNDRV_PCM_FMTBIT_U24_LE | SNDRV_PCM_FMTBIT_U24_BE,
2450 SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_S32_BE,
2451 SNDRV_PCM_FMTBIT_U32_LE | SNDRV_PCM_FMTBIT_U32_BE,
2452 SNDRV_PCM_FMTBIT_S24_3LE | SNDRV_PCM_FMTBIT_U24_3BE,
2453 SNDRV_PCM_FMTBIT_U24_3LE | SNDRV_PCM_FMTBIT_U24_3BE,
2454 SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S20_3BE,
2455 SNDRV_PCM_FMTBIT_U20_3LE | SNDRV_PCM_FMTBIT_U20_3BE,
2456 SNDRV_PCM_FMTBIT_S18_3LE | SNDRV_PCM_FMTBIT_S18_3BE,
2457 SNDRV_PCM_FMTBIT_U18_3LE | SNDRV_PCM_FMTBIT_U18_3BE,
2458 SNDRV_PCM_FMTBIT_FLOAT_LE | SNDRV_PCM_FMTBIT_FLOAT_BE,
2459 SNDRV_PCM_FMTBIT_FLOAT64_LE | SNDRV_PCM_FMTBIT_FLOAT64_BE,
2460 SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE
2461 | SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_BE,
2464 /* Fix up the DAI formats for endianness: codecs don't actually see
2465 * the endianness of the data but we're using the CPU format
2466 * definitions which do need to include endianness so we ensure that
2467 * codec DAIs always have both big and little endian variants set.
2469 static void fixup_codec_formats(struct snd_soc_pcm_stream *stream)
2473 for (i = 0; i < ARRAY_SIZE(codec_format_map); i++)
2474 if (stream->formats & codec_format_map[i])
2475 stream->formats |= codec_format_map[i];
2479 * snd_soc_register_codec - Register a codec with the ASoC core
2481 * @codec: codec to register
2483 int snd_soc_register_codec(struct snd_soc_codec *codec)
2490 /* The device should become mandatory over time */
2492 printk(KERN_WARNING "No device for codec %s\n", codec->name);
2494 INIT_LIST_HEAD(&codec->list);
2496 for (i = 0; i < codec->num_dai; i++) {
2497 fixup_codec_formats(&codec->dai[i].playback);
2498 fixup_codec_formats(&codec->dai[i].capture);
2501 mutex_lock(&client_mutex);
2502 list_add(&codec->list, &codec_list);
2503 snd_soc_instantiate_cards();
2504 mutex_unlock(&client_mutex);
2506 pr_debug("Registered codec '%s'\n", codec->name);
2510 EXPORT_SYMBOL_GPL(snd_soc_register_codec);
2513 * snd_soc_unregister_codec - Unregister a codec from the ASoC core
2515 * @codec: codec to unregister
2517 void snd_soc_unregister_codec(struct snd_soc_codec *codec)
2519 mutex_lock(&client_mutex);
2520 list_del(&codec->list);
2521 mutex_unlock(&client_mutex);
2523 pr_debug("Unregistered codec '%s'\n", codec->name);
2525 EXPORT_SYMBOL_GPL(snd_soc_unregister_codec);
2527 static int __init snd_soc_init(void)
2529 #ifdef CONFIG_DEBUG_FS
2530 debugfs_root = debugfs_create_dir("asoc", NULL);
2531 if (IS_ERR(debugfs_root) || !debugfs_root) {
2533 "ASoC: Failed to create debugfs directory\n");
2534 debugfs_root = NULL;
2538 return platform_driver_register(&soc_driver);
2541 static void __exit snd_soc_exit(void)
2543 #ifdef CONFIG_DEBUG_FS
2544 debugfs_remove_recursive(debugfs_root);
2546 platform_driver_unregister(&soc_driver);
2549 module_init(snd_soc_init);
2550 module_exit(snd_soc_exit);
2552 /* Module information */
2553 MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
2554 MODULE_DESCRIPTION("ALSA SoC Core");
2555 MODULE_LICENSE("GPL");
2556 MODULE_ALIAS("platform:soc-audio");