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");
794 #define soc_suspend NULL
795 #define soc_resume NULL
798 static void snd_soc_instantiate_card(struct snd_soc_card *card)
800 struct platform_device *pdev = container_of(card->dev,
801 struct platform_device,
803 struct snd_soc_codec_device *codec_dev = card->socdev->codec_dev;
804 struct snd_soc_platform *platform;
805 struct snd_soc_dai *dai;
806 int i, found, ret, ac97;
808 if (card->instantiated)
812 list_for_each_entry(platform, &platform_list, list)
813 if (card->platform == platform) {
818 dev_dbg(card->dev, "Platform %s not registered\n",
819 card->platform->name);
824 for (i = 0; i < card->num_links; i++) {
826 list_for_each_entry(dai, &dai_list, list)
827 if (card->dai_link[i].cpu_dai == dai) {
832 dev_dbg(card->dev, "DAI %s not registered\n",
833 card->dai_link[i].cpu_dai->name);
837 if (card->dai_link[i].cpu_dai->ac97_control)
841 /* If we have AC97 in the system then don't wait for the
842 * codec. This will need revisiting if we have to handle
843 * systems with mixed AC97 and non-AC97 parts. Only check for
844 * DAIs currently; we can't do this per link since some AC97
845 * codecs have non-AC97 DAIs.
848 for (i = 0; i < card->num_links; i++) {
850 list_for_each_entry(dai, &dai_list, list)
851 if (card->dai_link[i].codec_dai == dai) {
856 dev_dbg(card->dev, "DAI %s not registered\n",
857 card->dai_link[i].codec_dai->name);
862 /* Note that we do not current check for codec components */
864 dev_dbg(card->dev, "All components present, instantiating\n");
866 /* Found everything, bring it up */
868 ret = card->probe(pdev);
873 for (i = 0; i < card->num_links; i++) {
874 struct snd_soc_dai *cpu_dai = card->dai_link[i].cpu_dai;
875 if (cpu_dai->probe) {
876 ret = cpu_dai->probe(pdev, cpu_dai);
882 if (codec_dev->probe) {
883 ret = codec_dev->probe(pdev);
888 if (platform->probe) {
889 ret = platform->probe(pdev);
894 /* DAPM stream work */
895 INIT_DELAYED_WORK(&card->delayed_work, close_delayed_work);
897 /* deferred resume work */
898 INIT_WORK(&card->deferred_resume_work, soc_resume_deferred);
901 card->instantiated = 1;
906 if (codec_dev->remove)
907 codec_dev->remove(pdev);
910 for (i--; i >= 0; i--) {
911 struct snd_soc_dai *cpu_dai = card->dai_link[i].cpu_dai;
913 cpu_dai->remove(pdev, cpu_dai);
921 * Attempt to initialise any uninitalised cards. Must be called with
924 static void snd_soc_instantiate_cards(void)
926 struct snd_soc_card *card;
927 list_for_each_entry(card, &card_list, list)
928 snd_soc_instantiate_card(card);
931 /* probes a new socdev */
932 static int soc_probe(struct platform_device *pdev)
935 struct snd_soc_device *socdev = platform_get_drvdata(pdev);
936 struct snd_soc_card *card = socdev->card;
938 /* Bodge while we push things out of socdev */
939 card->socdev = socdev;
941 /* Bodge while we unpick instantiation */
942 card->dev = &pdev->dev;
943 ret = snd_soc_register_card(card);
945 dev_err(&pdev->dev, "Failed to register card\n");
952 /* removes a socdev */
953 static int soc_remove(struct platform_device *pdev)
956 struct snd_soc_device *socdev = platform_get_drvdata(pdev);
957 struct snd_soc_card *card = socdev->card;
958 struct snd_soc_platform *platform = card->platform;
959 struct snd_soc_codec_device *codec_dev = socdev->codec_dev;
961 if (!card->instantiated)
964 run_delayed_work(&card->delayed_work);
966 if (platform->remove)
967 platform->remove(pdev);
969 if (codec_dev->remove)
970 codec_dev->remove(pdev);
972 for (i = 0; i < card->num_links; i++) {
973 struct snd_soc_dai *cpu_dai = card->dai_link[i].cpu_dai;
975 cpu_dai->remove(pdev, cpu_dai);
981 snd_soc_unregister_card(card);
986 static int soc_poweroff(struct device *dev)
988 struct platform_device *pdev = to_platform_device(dev);
989 struct snd_soc_device *socdev = platform_get_drvdata(pdev);
990 struct snd_soc_card *card = socdev->card;
992 if (!card->instantiated)
995 /* Flush out pmdown_time work - we actually do want to run it
996 * now, we're shutting down so no imminent restart. */
997 run_delayed_work(&card->delayed_work);
999 snd_soc_dapm_shutdown(socdev);
1004 static struct dev_pm_ops soc_pm_ops = {
1005 .suspend = soc_suspend,
1006 .resume = soc_resume,
1007 .poweroff = soc_poweroff,
1010 /* ASoC platform driver */
1011 static struct platform_driver soc_driver = {
1013 .name = "soc-audio",
1014 .owner = THIS_MODULE,
1018 .remove = soc_remove,
1021 /* create a new pcm */
1022 static int soc_new_pcm(struct snd_soc_device *socdev,
1023 struct snd_soc_dai_link *dai_link, int num)
1025 struct snd_soc_card *card = socdev->card;
1026 struct snd_soc_codec *codec = card->codec;
1027 struct snd_soc_platform *platform = card->platform;
1028 struct snd_soc_dai *codec_dai = dai_link->codec_dai;
1029 struct snd_soc_dai *cpu_dai = dai_link->cpu_dai;
1030 struct snd_soc_pcm_runtime *rtd;
1031 struct snd_pcm *pcm;
1033 int ret = 0, playback = 0, capture = 0;
1035 rtd = kzalloc(sizeof(struct snd_soc_pcm_runtime), GFP_KERNEL);
1039 rtd->dai = dai_link;
1040 rtd->socdev = socdev;
1041 codec_dai->codec = card->codec;
1043 /* check client and interface hw capabilities */
1044 sprintf(new_name, "%s %s-%d", dai_link->stream_name, codec_dai->name,
1047 if (codec_dai->playback.channels_min)
1049 if (codec_dai->capture.channels_min)
1052 ret = snd_pcm_new(codec->card, new_name, codec->pcm_devs++, playback,
1055 printk(KERN_ERR "asoc: can't create pcm for codec %s\n",
1061 dai_link->pcm = pcm;
1062 pcm->private_data = rtd;
1063 soc_pcm_ops.mmap = platform->pcm_ops->mmap;
1064 soc_pcm_ops.pointer = platform->pcm_ops->pointer;
1065 soc_pcm_ops.ioctl = platform->pcm_ops->ioctl;
1066 soc_pcm_ops.copy = platform->pcm_ops->copy;
1067 soc_pcm_ops.silence = platform->pcm_ops->silence;
1068 soc_pcm_ops.ack = platform->pcm_ops->ack;
1069 soc_pcm_ops.page = platform->pcm_ops->page;
1072 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &soc_pcm_ops);
1075 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &soc_pcm_ops);
1077 ret = platform->pcm_new(codec->card, codec_dai, pcm);
1079 printk(KERN_ERR "asoc: platform pcm constructor failed\n");
1084 pcm->private_free = platform->pcm_free;
1085 printk(KERN_INFO "asoc: %s <-> %s mapping ok\n", codec_dai->name,
1091 * snd_soc_codec_volatile_register: Report if a register is volatile.
1093 * @codec: CODEC to query.
1094 * @reg: Register to query.
1096 * Boolean function indiciating if a CODEC register is volatile.
1098 int snd_soc_codec_volatile_register(struct snd_soc_codec *codec, int reg)
1100 if (codec->volatile_register)
1101 return codec->volatile_register(reg);
1105 EXPORT_SYMBOL_GPL(snd_soc_codec_volatile_register);
1107 /* codec register dump */
1108 static ssize_t soc_codec_reg_show(struct snd_soc_codec *codec, char *buf)
1110 int i, step = 1, count = 0;
1112 if (!codec->reg_cache_size)
1115 if (codec->reg_cache_step)
1116 step = codec->reg_cache_step;
1118 count += sprintf(buf, "%s registers\n", codec->name);
1119 for (i = 0; i < codec->reg_cache_size; i += step) {
1120 if (codec->readable_register && !codec->readable_register(i))
1123 count += sprintf(buf + count, "%2x: ", i);
1124 if (count >= PAGE_SIZE - 1)
1127 if (codec->display_register)
1128 count += codec->display_register(codec, buf + count,
1129 PAGE_SIZE - count, i);
1131 count += snprintf(buf + count, PAGE_SIZE - count,
1132 "%4x", codec->read(codec, i));
1134 if (count >= PAGE_SIZE - 1)
1137 count += snprintf(buf + count, PAGE_SIZE - count, "\n");
1138 if (count >= PAGE_SIZE - 1)
1142 /* Truncate count; min() would cause a warning */
1143 if (count >= PAGE_SIZE)
1144 count = PAGE_SIZE - 1;
1148 static ssize_t codec_reg_show(struct device *dev,
1149 struct device_attribute *attr, char *buf)
1151 struct snd_soc_device *devdata = dev_get_drvdata(dev);
1152 return soc_codec_reg_show(devdata->card->codec, buf);
1155 static DEVICE_ATTR(codec_reg, 0444, codec_reg_show, NULL);
1157 #ifdef CONFIG_DEBUG_FS
1158 static int codec_reg_open_file(struct inode *inode, struct file *file)
1160 file->private_data = inode->i_private;
1164 static ssize_t codec_reg_read_file(struct file *file, char __user *user_buf,
1165 size_t count, loff_t *ppos)
1168 struct snd_soc_codec *codec = file->private_data;
1169 char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
1172 ret = soc_codec_reg_show(codec, buf);
1174 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
1179 static ssize_t codec_reg_write_file(struct file *file,
1180 const char __user *user_buf, size_t count, loff_t *ppos)
1185 unsigned long reg, value;
1187 struct snd_soc_codec *codec = file->private_data;
1189 buf_size = min(count, (sizeof(buf)-1));
1190 if (copy_from_user(buf, user_buf, buf_size))
1194 if (codec->reg_cache_step)
1195 step = codec->reg_cache_step;
1197 while (*start == ' ')
1199 reg = simple_strtoul(start, &start, 16);
1200 if ((reg >= codec->reg_cache_size) || (reg % step))
1202 while (*start == ' ')
1204 if (strict_strtoul(start, 16, &value))
1206 codec->write(codec, reg, value);
1210 static const struct file_operations codec_reg_fops = {
1211 .open = codec_reg_open_file,
1212 .read = codec_reg_read_file,
1213 .write = codec_reg_write_file,
1216 static void soc_init_codec_debugfs(struct snd_soc_codec *codec)
1218 char codec_root[128];
1221 snprintf(codec_root, sizeof(codec_root),
1222 "%s.%s", codec->name, dev_name(codec->dev));
1224 snprintf(codec_root, sizeof(codec_root),
1227 codec->debugfs_codec_root = debugfs_create_dir(codec_root,
1229 if (!codec->debugfs_codec_root) {
1231 "ASoC: Failed to create codec debugfs directory\n");
1235 codec->debugfs_reg = debugfs_create_file("codec_reg", 0644,
1236 codec->debugfs_codec_root,
1237 codec, &codec_reg_fops);
1238 if (!codec->debugfs_reg)
1240 "ASoC: Failed to create codec register debugfs file\n");
1242 codec->debugfs_pop_time = debugfs_create_u32("dapm_pop_time", 0744,
1243 codec->debugfs_codec_root,
1245 if (!codec->debugfs_pop_time)
1247 "Failed to create pop time debugfs file\n");
1249 codec->debugfs_dapm = debugfs_create_dir("dapm",
1250 codec->debugfs_codec_root);
1251 if (!codec->debugfs_dapm)
1253 "Failed to create DAPM debugfs directory\n");
1255 snd_soc_dapm_debugfs_init(codec);
1258 static void soc_cleanup_codec_debugfs(struct snd_soc_codec *codec)
1260 debugfs_remove_recursive(codec->debugfs_codec_root);
1265 static inline void soc_init_codec_debugfs(struct snd_soc_codec *codec)
1269 static inline void soc_cleanup_codec_debugfs(struct snd_soc_codec *codec)
1275 * snd_soc_new_ac97_codec - initailise AC97 device
1276 * @codec: audio codec
1277 * @ops: AC97 bus operations
1278 * @num: AC97 codec number
1280 * Initialises AC97 codec resources for use by ad-hoc devices only.
1282 int snd_soc_new_ac97_codec(struct snd_soc_codec *codec,
1283 struct snd_ac97_bus_ops *ops, int num)
1285 mutex_lock(&codec->mutex);
1287 codec->ac97 = kzalloc(sizeof(struct snd_ac97), GFP_KERNEL);
1288 if (codec->ac97 == NULL) {
1289 mutex_unlock(&codec->mutex);
1293 codec->ac97->bus = kzalloc(sizeof(struct snd_ac97_bus), GFP_KERNEL);
1294 if (codec->ac97->bus == NULL) {
1297 mutex_unlock(&codec->mutex);
1301 codec->ac97->bus->ops = ops;
1302 codec->ac97->num = num;
1303 mutex_unlock(&codec->mutex);
1306 EXPORT_SYMBOL_GPL(snd_soc_new_ac97_codec);
1309 * snd_soc_free_ac97_codec - free AC97 codec device
1310 * @codec: audio codec
1312 * Frees AC97 codec device resources.
1314 void snd_soc_free_ac97_codec(struct snd_soc_codec *codec)
1316 mutex_lock(&codec->mutex);
1317 kfree(codec->ac97->bus);
1320 mutex_unlock(&codec->mutex);
1322 EXPORT_SYMBOL_GPL(snd_soc_free_ac97_codec);
1325 * snd_soc_update_bits - update codec register bits
1326 * @codec: audio codec
1327 * @reg: codec register
1328 * @mask: register mask
1331 * Writes new register value.
1333 * Returns 1 for change else 0.
1335 int snd_soc_update_bits(struct snd_soc_codec *codec, unsigned short reg,
1336 unsigned int mask, unsigned int value)
1339 unsigned int old, new;
1341 mutex_lock(&io_mutex);
1342 old = snd_soc_read(codec, reg);
1343 new = (old & ~mask) | value;
1344 change = old != new;
1346 snd_soc_write(codec, reg, new);
1348 mutex_unlock(&io_mutex);
1351 EXPORT_SYMBOL_GPL(snd_soc_update_bits);
1354 * snd_soc_test_bits - test register for change
1355 * @codec: audio codec
1356 * @reg: codec register
1357 * @mask: register mask
1360 * Tests a register with a new value and checks if the new value is
1361 * different from the old value.
1363 * Returns 1 for change else 0.
1365 int snd_soc_test_bits(struct snd_soc_codec *codec, unsigned short reg,
1366 unsigned int mask, unsigned int value)
1369 unsigned int old, new;
1371 mutex_lock(&io_mutex);
1372 old = snd_soc_read(codec, reg);
1373 new = (old & ~mask) | value;
1374 change = old != new;
1375 mutex_unlock(&io_mutex);
1379 EXPORT_SYMBOL_GPL(snd_soc_test_bits);
1382 * snd_soc_new_pcms - create new sound card and pcms
1383 * @socdev: the SoC audio device
1384 * @idx: ALSA card index
1385 * @xid: card identification
1387 * Create a new sound card based upon the codec and interface pcms.
1389 * Returns 0 for success, else error.
1391 int snd_soc_new_pcms(struct snd_soc_device *socdev, int idx, const char *xid)
1393 struct snd_soc_card *card = socdev->card;
1394 struct snd_soc_codec *codec = card->codec;
1397 mutex_lock(&codec->mutex);
1399 /* register a sound card */
1400 ret = snd_card_create(idx, xid, codec->owner, 0, &codec->card);
1402 printk(KERN_ERR "asoc: can't create sound card for codec %s\n",
1404 mutex_unlock(&codec->mutex);
1408 codec->socdev = socdev;
1409 codec->card->dev = socdev->dev;
1410 codec->card->private_data = codec;
1411 strncpy(codec->card->driver, codec->name, sizeof(codec->card->driver));
1413 /* create the pcms */
1414 for (i = 0; i < card->num_links; i++) {
1415 ret = soc_new_pcm(socdev, &card->dai_link[i], i);
1417 printk(KERN_ERR "asoc: can't create pcm %s\n",
1418 card->dai_link[i].stream_name);
1419 mutex_unlock(&codec->mutex);
1424 mutex_unlock(&codec->mutex);
1427 EXPORT_SYMBOL_GPL(snd_soc_new_pcms);
1430 * snd_soc_init_card - register sound card
1431 * @socdev: the SoC audio device
1433 * Register a SoC sound card. Also registers an AC97 device if the
1434 * codec is AC97 for ad hoc devices.
1436 * Returns 0 for success, else error.
1438 int snd_soc_init_card(struct snd_soc_device *socdev)
1440 struct snd_soc_card *card = socdev->card;
1441 struct snd_soc_codec *codec = card->codec;
1442 int ret = 0, i, ac97 = 0, err = 0;
1444 for (i = 0; i < card->num_links; i++) {
1445 if (card->dai_link[i].init) {
1446 err = card->dai_link[i].init(codec);
1448 printk(KERN_ERR "asoc: failed to init %s\n",
1449 card->dai_link[i].stream_name);
1453 if (card->dai_link[i].codec_dai->ac97_control) {
1455 snd_ac97_dev_add_pdata(codec->ac97,
1456 card->dai_link[i].cpu_dai->ac97_pdata);
1459 snprintf(codec->card->shortname, sizeof(codec->card->shortname),
1461 snprintf(codec->card->longname, sizeof(codec->card->longname),
1462 "%s (%s)", card->name, codec->name);
1464 /* Make sure all DAPM widgets are instantiated */
1465 snd_soc_dapm_new_widgets(codec);
1467 ret = snd_card_register(codec->card);
1469 printk(KERN_ERR "asoc: failed to register soundcard for %s\n",
1474 mutex_lock(&codec->mutex);
1475 #ifdef CONFIG_SND_SOC_AC97_BUS
1476 /* Only instantiate AC97 if not already done by the adaptor
1477 * for the generic AC97 subsystem.
1479 if (ac97 && strcmp(codec->name, "AC97") != 0) {
1480 ret = soc_ac97_dev_register(codec);
1482 printk(KERN_ERR "asoc: AC97 device register failed\n");
1483 snd_card_free(codec->card);
1484 mutex_unlock(&codec->mutex);
1490 err = snd_soc_dapm_sys_add(socdev->dev);
1492 printk(KERN_WARNING "asoc: failed to add dapm sysfs entries\n");
1494 err = device_create_file(socdev->dev, &dev_attr_codec_reg);
1496 printk(KERN_WARNING "asoc: failed to add codec sysfs files\n");
1498 soc_init_codec_debugfs(codec);
1499 mutex_unlock(&codec->mutex);
1504 EXPORT_SYMBOL_GPL(snd_soc_init_card);
1507 * snd_soc_free_pcms - free sound card and pcms
1508 * @socdev: the SoC audio device
1510 * Frees sound card and pcms associated with the socdev.
1511 * Also unregister the codec if it is an AC97 device.
1513 void snd_soc_free_pcms(struct snd_soc_device *socdev)
1515 struct snd_soc_codec *codec = socdev->card->codec;
1516 #ifdef CONFIG_SND_SOC_AC97_BUS
1517 struct snd_soc_dai *codec_dai;
1521 mutex_lock(&codec->mutex);
1522 soc_cleanup_codec_debugfs(codec);
1523 #ifdef CONFIG_SND_SOC_AC97_BUS
1524 for (i = 0; i < codec->num_dai; i++) {
1525 codec_dai = &codec->dai[i];
1526 if (codec_dai->ac97_control && codec->ac97 &&
1527 strcmp(codec->name, "AC97") != 0) {
1528 soc_ac97_dev_unregister(codec);
1536 snd_card_free(codec->card);
1537 device_remove_file(socdev->dev, &dev_attr_codec_reg);
1538 mutex_unlock(&codec->mutex);
1540 EXPORT_SYMBOL_GPL(snd_soc_free_pcms);
1543 * snd_soc_set_runtime_hwparams - set the runtime hardware parameters
1544 * @substream: the pcm substream
1545 * @hw: the hardware parameters
1547 * Sets the substream runtime hardware parameters.
1549 int snd_soc_set_runtime_hwparams(struct snd_pcm_substream *substream,
1550 const struct snd_pcm_hardware *hw)
1552 struct snd_pcm_runtime *runtime = substream->runtime;
1553 runtime->hw.info = hw->info;
1554 runtime->hw.formats = hw->formats;
1555 runtime->hw.period_bytes_min = hw->period_bytes_min;
1556 runtime->hw.period_bytes_max = hw->period_bytes_max;
1557 runtime->hw.periods_min = hw->periods_min;
1558 runtime->hw.periods_max = hw->periods_max;
1559 runtime->hw.buffer_bytes_max = hw->buffer_bytes_max;
1560 runtime->hw.fifo_size = hw->fifo_size;
1563 EXPORT_SYMBOL_GPL(snd_soc_set_runtime_hwparams);
1566 * snd_soc_cnew - create new control
1567 * @_template: control template
1568 * @data: control private data
1569 * @long_name: control long name
1571 * Create a new mixer control from a template control.
1573 * Returns 0 for success, else error.
1575 struct snd_kcontrol *snd_soc_cnew(const struct snd_kcontrol_new *_template,
1576 void *data, char *long_name)
1578 struct snd_kcontrol_new template;
1580 memcpy(&template, _template, sizeof(template));
1582 template.name = long_name;
1585 return snd_ctl_new1(&template, data);
1587 EXPORT_SYMBOL_GPL(snd_soc_cnew);
1590 * snd_soc_add_controls - add an array of controls to a codec.
1591 * Convienience function to add a list of controls. Many codecs were
1592 * duplicating this code.
1594 * @codec: codec to add controls to
1595 * @controls: array of controls to add
1596 * @num_controls: number of elements in the array
1598 * Return 0 for success, else error.
1600 int snd_soc_add_controls(struct snd_soc_codec *codec,
1601 const struct snd_kcontrol_new *controls, int num_controls)
1603 struct snd_card *card = codec->card;
1606 for (i = 0; i < num_controls; i++) {
1607 const struct snd_kcontrol_new *control = &controls[i];
1608 err = snd_ctl_add(card, snd_soc_cnew(control, codec, NULL));
1610 dev_err(codec->dev, "%s: Failed to add %s\n",
1611 codec->name, control->name);
1618 EXPORT_SYMBOL_GPL(snd_soc_add_controls);
1621 * snd_soc_info_enum_double - enumerated double mixer info callback
1622 * @kcontrol: mixer control
1623 * @uinfo: control element information
1625 * Callback to provide information about a double enumerated
1628 * Returns 0 for success.
1630 int snd_soc_info_enum_double(struct snd_kcontrol *kcontrol,
1631 struct snd_ctl_elem_info *uinfo)
1633 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
1635 uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
1636 uinfo->count = e->shift_l == e->shift_r ? 1 : 2;
1637 uinfo->value.enumerated.items = e->max;
1639 if (uinfo->value.enumerated.item > e->max - 1)
1640 uinfo->value.enumerated.item = e->max - 1;
1641 strcpy(uinfo->value.enumerated.name,
1642 e->texts[uinfo->value.enumerated.item]);
1645 EXPORT_SYMBOL_GPL(snd_soc_info_enum_double);
1648 * snd_soc_get_enum_double - enumerated double mixer get callback
1649 * @kcontrol: mixer control
1650 * @ucontrol: control element information
1652 * Callback to get the value of a double enumerated mixer.
1654 * Returns 0 for success.
1656 int snd_soc_get_enum_double(struct snd_kcontrol *kcontrol,
1657 struct snd_ctl_elem_value *ucontrol)
1659 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
1660 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
1661 unsigned int val, bitmask;
1663 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
1665 val = snd_soc_read(codec, e->reg);
1666 ucontrol->value.enumerated.item[0]
1667 = (val >> e->shift_l) & (bitmask - 1);
1668 if (e->shift_l != e->shift_r)
1669 ucontrol->value.enumerated.item[1] =
1670 (val >> e->shift_r) & (bitmask - 1);
1674 EXPORT_SYMBOL_GPL(snd_soc_get_enum_double);
1677 * snd_soc_put_enum_double - enumerated double mixer put callback
1678 * @kcontrol: mixer control
1679 * @ucontrol: control element information
1681 * Callback to set the value of a double enumerated mixer.
1683 * Returns 0 for success.
1685 int snd_soc_put_enum_double(struct snd_kcontrol *kcontrol,
1686 struct snd_ctl_elem_value *ucontrol)
1688 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
1689 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
1691 unsigned int mask, bitmask;
1693 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
1695 if (ucontrol->value.enumerated.item[0] > e->max - 1)
1697 val = ucontrol->value.enumerated.item[0] << e->shift_l;
1698 mask = (bitmask - 1) << e->shift_l;
1699 if (e->shift_l != e->shift_r) {
1700 if (ucontrol->value.enumerated.item[1] > e->max - 1)
1702 val |= ucontrol->value.enumerated.item[1] << e->shift_r;
1703 mask |= (bitmask - 1) << e->shift_r;
1706 return snd_soc_update_bits(codec, e->reg, mask, val);
1708 EXPORT_SYMBOL_GPL(snd_soc_put_enum_double);
1711 * snd_soc_get_value_enum_double - semi enumerated double mixer get callback
1712 * @kcontrol: mixer control
1713 * @ucontrol: control element information
1715 * Callback to get the value of a double semi enumerated mixer.
1717 * Semi enumerated mixer: the enumerated items are referred as values. Can be
1718 * used for handling bitfield coded enumeration for example.
1720 * Returns 0 for success.
1722 int snd_soc_get_value_enum_double(struct snd_kcontrol *kcontrol,
1723 struct snd_ctl_elem_value *ucontrol)
1725 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
1726 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
1727 unsigned int reg_val, val, mux;
1729 reg_val = snd_soc_read(codec, e->reg);
1730 val = (reg_val >> e->shift_l) & e->mask;
1731 for (mux = 0; mux < e->max; mux++) {
1732 if (val == e->values[mux])
1735 ucontrol->value.enumerated.item[0] = mux;
1736 if (e->shift_l != e->shift_r) {
1737 val = (reg_val >> e->shift_r) & e->mask;
1738 for (mux = 0; mux < e->max; mux++) {
1739 if (val == e->values[mux])
1742 ucontrol->value.enumerated.item[1] = mux;
1747 EXPORT_SYMBOL_GPL(snd_soc_get_value_enum_double);
1750 * snd_soc_put_value_enum_double - semi enumerated double mixer put callback
1751 * @kcontrol: mixer control
1752 * @ucontrol: control element information
1754 * Callback to set the value of a double semi enumerated mixer.
1756 * Semi enumerated mixer: the enumerated items are referred as values. Can be
1757 * used for handling bitfield coded enumeration for example.
1759 * Returns 0 for success.
1761 int snd_soc_put_value_enum_double(struct snd_kcontrol *kcontrol,
1762 struct snd_ctl_elem_value *ucontrol)
1764 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
1765 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
1769 if (ucontrol->value.enumerated.item[0] > e->max - 1)
1771 val = e->values[ucontrol->value.enumerated.item[0]] << e->shift_l;
1772 mask = e->mask << e->shift_l;
1773 if (e->shift_l != e->shift_r) {
1774 if (ucontrol->value.enumerated.item[1] > e->max - 1)
1776 val |= e->values[ucontrol->value.enumerated.item[1]] << e->shift_r;
1777 mask |= e->mask << e->shift_r;
1780 return snd_soc_update_bits(codec, e->reg, mask, val);
1782 EXPORT_SYMBOL_GPL(snd_soc_put_value_enum_double);
1785 * snd_soc_info_enum_ext - external enumerated single mixer info callback
1786 * @kcontrol: mixer control
1787 * @uinfo: control element information
1789 * Callback to provide information about an external enumerated
1792 * Returns 0 for success.
1794 int snd_soc_info_enum_ext(struct snd_kcontrol *kcontrol,
1795 struct snd_ctl_elem_info *uinfo)
1797 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
1799 uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
1801 uinfo->value.enumerated.items = e->max;
1803 if (uinfo->value.enumerated.item > e->max - 1)
1804 uinfo->value.enumerated.item = e->max - 1;
1805 strcpy(uinfo->value.enumerated.name,
1806 e->texts[uinfo->value.enumerated.item]);
1809 EXPORT_SYMBOL_GPL(snd_soc_info_enum_ext);
1812 * snd_soc_info_volsw_ext - external single mixer info callback
1813 * @kcontrol: mixer control
1814 * @uinfo: control element information
1816 * Callback to provide information about a single external mixer control.
1818 * Returns 0 for success.
1820 int snd_soc_info_volsw_ext(struct snd_kcontrol *kcontrol,
1821 struct snd_ctl_elem_info *uinfo)
1823 int max = kcontrol->private_value;
1825 if (max == 1 && !strstr(kcontrol->id.name, " Volume"))
1826 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
1828 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
1831 uinfo->value.integer.min = 0;
1832 uinfo->value.integer.max = max;
1835 EXPORT_SYMBOL_GPL(snd_soc_info_volsw_ext);
1838 * snd_soc_info_volsw - single mixer info callback
1839 * @kcontrol: mixer control
1840 * @uinfo: control element information
1842 * Callback to provide information about a single mixer control.
1844 * Returns 0 for success.
1846 int snd_soc_info_volsw(struct snd_kcontrol *kcontrol,
1847 struct snd_ctl_elem_info *uinfo)
1849 struct soc_mixer_control *mc =
1850 (struct soc_mixer_control *)kcontrol->private_value;
1852 unsigned int shift = mc->shift;
1853 unsigned int rshift = mc->rshift;
1855 if (max == 1 && !strstr(kcontrol->id.name, " Volume"))
1856 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
1858 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
1860 uinfo->count = shift == rshift ? 1 : 2;
1861 uinfo->value.integer.min = 0;
1862 uinfo->value.integer.max = max;
1865 EXPORT_SYMBOL_GPL(snd_soc_info_volsw);
1868 * snd_soc_get_volsw - single mixer get callback
1869 * @kcontrol: mixer control
1870 * @ucontrol: control element information
1872 * Callback to get the value of a single mixer control.
1874 * Returns 0 for success.
1876 int snd_soc_get_volsw(struct snd_kcontrol *kcontrol,
1877 struct snd_ctl_elem_value *ucontrol)
1879 struct soc_mixer_control *mc =
1880 (struct soc_mixer_control *)kcontrol->private_value;
1881 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
1882 unsigned int reg = mc->reg;
1883 unsigned int shift = mc->shift;
1884 unsigned int rshift = mc->rshift;
1886 unsigned int mask = (1 << fls(max)) - 1;
1887 unsigned int invert = mc->invert;
1889 ucontrol->value.integer.value[0] =
1890 (snd_soc_read(codec, reg) >> shift) & mask;
1891 if (shift != rshift)
1892 ucontrol->value.integer.value[1] =
1893 (snd_soc_read(codec, reg) >> rshift) & mask;
1895 ucontrol->value.integer.value[0] =
1896 max - ucontrol->value.integer.value[0];
1897 if (shift != rshift)
1898 ucontrol->value.integer.value[1] =
1899 max - ucontrol->value.integer.value[1];
1904 EXPORT_SYMBOL_GPL(snd_soc_get_volsw);
1907 * snd_soc_put_volsw - single mixer put callback
1908 * @kcontrol: mixer control
1909 * @ucontrol: control element information
1911 * Callback to set the value of a single mixer control.
1913 * Returns 0 for success.
1915 int snd_soc_put_volsw(struct snd_kcontrol *kcontrol,
1916 struct snd_ctl_elem_value *ucontrol)
1918 struct soc_mixer_control *mc =
1919 (struct soc_mixer_control *)kcontrol->private_value;
1920 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
1921 unsigned int reg = mc->reg;
1922 unsigned int shift = mc->shift;
1923 unsigned int rshift = mc->rshift;
1925 unsigned int mask = (1 << fls(max)) - 1;
1926 unsigned int invert = mc->invert;
1927 unsigned int val, val2, val_mask;
1929 val = (ucontrol->value.integer.value[0] & mask);
1932 val_mask = mask << shift;
1934 if (shift != rshift) {
1935 val2 = (ucontrol->value.integer.value[1] & mask);
1938 val_mask |= mask << rshift;
1939 val |= val2 << rshift;
1941 return snd_soc_update_bits(codec, reg, val_mask, val);
1943 EXPORT_SYMBOL_GPL(snd_soc_put_volsw);
1946 * snd_soc_info_volsw_2r - double mixer info callback
1947 * @kcontrol: mixer control
1948 * @uinfo: control element information
1950 * Callback to provide information about a double mixer control that
1951 * spans 2 codec registers.
1953 * Returns 0 for success.
1955 int snd_soc_info_volsw_2r(struct snd_kcontrol *kcontrol,
1956 struct snd_ctl_elem_info *uinfo)
1958 struct soc_mixer_control *mc =
1959 (struct soc_mixer_control *)kcontrol->private_value;
1962 if (max == 1 && !strstr(kcontrol->id.name, " Volume"))
1963 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
1965 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
1968 uinfo->value.integer.min = 0;
1969 uinfo->value.integer.max = max;
1972 EXPORT_SYMBOL_GPL(snd_soc_info_volsw_2r);
1975 * snd_soc_get_volsw_2r - double mixer get callback
1976 * @kcontrol: mixer control
1977 * @ucontrol: control element information
1979 * Callback to get the value of a double mixer control that spans 2 registers.
1981 * Returns 0 for success.
1983 int snd_soc_get_volsw_2r(struct snd_kcontrol *kcontrol,
1984 struct snd_ctl_elem_value *ucontrol)
1986 struct soc_mixer_control *mc =
1987 (struct soc_mixer_control *)kcontrol->private_value;
1988 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
1989 unsigned int reg = mc->reg;
1990 unsigned int reg2 = mc->rreg;
1991 unsigned int shift = mc->shift;
1993 unsigned int mask = (1 << fls(max)) - 1;
1994 unsigned int invert = mc->invert;
1996 ucontrol->value.integer.value[0] =
1997 (snd_soc_read(codec, reg) >> shift) & mask;
1998 ucontrol->value.integer.value[1] =
1999 (snd_soc_read(codec, reg2) >> shift) & mask;
2001 ucontrol->value.integer.value[0] =
2002 max - ucontrol->value.integer.value[0];
2003 ucontrol->value.integer.value[1] =
2004 max - ucontrol->value.integer.value[1];
2009 EXPORT_SYMBOL_GPL(snd_soc_get_volsw_2r);
2012 * snd_soc_put_volsw_2r - double mixer set callback
2013 * @kcontrol: mixer control
2014 * @ucontrol: control element information
2016 * Callback to set the value of a double mixer control that spans 2 registers.
2018 * Returns 0 for success.
2020 int snd_soc_put_volsw_2r(struct snd_kcontrol *kcontrol,
2021 struct snd_ctl_elem_value *ucontrol)
2023 struct soc_mixer_control *mc =
2024 (struct soc_mixer_control *)kcontrol->private_value;
2025 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2026 unsigned int reg = mc->reg;
2027 unsigned int reg2 = mc->rreg;
2028 unsigned int shift = mc->shift;
2030 unsigned int mask = (1 << fls(max)) - 1;
2031 unsigned int invert = mc->invert;
2033 unsigned int val, val2, val_mask;
2035 val_mask = mask << shift;
2036 val = (ucontrol->value.integer.value[0] & mask);
2037 val2 = (ucontrol->value.integer.value[1] & mask);
2045 val2 = val2 << shift;
2047 err = snd_soc_update_bits(codec, reg, val_mask, val);
2051 err = snd_soc_update_bits(codec, reg2, val_mask, val2);
2054 EXPORT_SYMBOL_GPL(snd_soc_put_volsw_2r);
2057 * snd_soc_info_volsw_s8 - signed mixer info callback
2058 * @kcontrol: mixer control
2059 * @uinfo: control element information
2061 * Callback to provide information about a signed mixer control.
2063 * Returns 0 for success.
2065 int snd_soc_info_volsw_s8(struct snd_kcontrol *kcontrol,
2066 struct snd_ctl_elem_info *uinfo)
2068 struct soc_mixer_control *mc =
2069 (struct soc_mixer_control *)kcontrol->private_value;
2073 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
2075 uinfo->value.integer.min = 0;
2076 uinfo->value.integer.max = max-min;
2079 EXPORT_SYMBOL_GPL(snd_soc_info_volsw_s8);
2082 * snd_soc_get_volsw_s8 - signed mixer get callback
2083 * @kcontrol: mixer control
2084 * @ucontrol: control element information
2086 * Callback to get the value of a signed mixer control.
2088 * Returns 0 for success.
2090 int snd_soc_get_volsw_s8(struct snd_kcontrol *kcontrol,
2091 struct snd_ctl_elem_value *ucontrol)
2093 struct soc_mixer_control *mc =
2094 (struct soc_mixer_control *)kcontrol->private_value;
2095 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2096 unsigned int reg = mc->reg;
2098 int val = snd_soc_read(codec, reg);
2100 ucontrol->value.integer.value[0] =
2101 ((signed char)(val & 0xff))-min;
2102 ucontrol->value.integer.value[1] =
2103 ((signed char)((val >> 8) & 0xff))-min;
2106 EXPORT_SYMBOL_GPL(snd_soc_get_volsw_s8);
2109 * snd_soc_put_volsw_sgn - signed mixer put callback
2110 * @kcontrol: mixer control
2111 * @ucontrol: control element information
2113 * Callback to set the value of a signed mixer control.
2115 * Returns 0 for success.
2117 int snd_soc_put_volsw_s8(struct snd_kcontrol *kcontrol,
2118 struct snd_ctl_elem_value *ucontrol)
2120 struct soc_mixer_control *mc =
2121 (struct soc_mixer_control *)kcontrol->private_value;
2122 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2123 unsigned int reg = mc->reg;
2127 val = (ucontrol->value.integer.value[0]+min) & 0xff;
2128 val |= ((ucontrol->value.integer.value[1]+min) & 0xff) << 8;
2130 return snd_soc_update_bits(codec, reg, 0xffff, val);
2132 EXPORT_SYMBOL_GPL(snd_soc_put_volsw_s8);
2135 * snd_soc_dai_set_sysclk - configure DAI system or master clock.
2137 * @clk_id: DAI specific clock ID
2138 * @freq: new clock frequency in Hz
2139 * @dir: new clock direction - input/output.
2141 * Configures the DAI master (MCLK) or system (SYSCLK) clocking.
2143 int snd_soc_dai_set_sysclk(struct snd_soc_dai *dai, int clk_id,
2144 unsigned int freq, int dir)
2146 if (dai->ops && dai->ops->set_sysclk)
2147 return dai->ops->set_sysclk(dai, clk_id, freq, dir);
2151 EXPORT_SYMBOL_GPL(snd_soc_dai_set_sysclk);
2154 * snd_soc_dai_set_clkdiv - configure DAI clock dividers.
2156 * @div_id: DAI specific clock divider ID
2157 * @div: new clock divisor.
2159 * Configures the clock dividers. This is used to derive the best DAI bit and
2160 * frame clocks from the system or master clock. It's best to set the DAI bit
2161 * and frame clocks as low as possible to save system power.
2163 int snd_soc_dai_set_clkdiv(struct snd_soc_dai *dai,
2164 int div_id, int div)
2166 if (dai->ops && dai->ops->set_clkdiv)
2167 return dai->ops->set_clkdiv(dai, div_id, div);
2171 EXPORT_SYMBOL_GPL(snd_soc_dai_set_clkdiv);
2174 * snd_soc_dai_set_pll - configure DAI PLL.
2176 * @pll_id: DAI specific PLL ID
2177 * @source: DAI specific source for the PLL
2178 * @freq_in: PLL input clock frequency in Hz
2179 * @freq_out: requested PLL output clock frequency in Hz
2181 * Configures and enables PLL to generate output clock based on input clock.
2183 int snd_soc_dai_set_pll(struct snd_soc_dai *dai, int pll_id, int source,
2184 unsigned int freq_in, unsigned int freq_out)
2186 if (dai->ops && dai->ops->set_pll)
2187 return dai->ops->set_pll(dai, pll_id, source,
2192 EXPORT_SYMBOL_GPL(snd_soc_dai_set_pll);
2195 * snd_soc_dai_set_fmt - configure DAI hardware audio format.
2197 * @fmt: SND_SOC_DAIFMT_ format value.
2199 * Configures the DAI hardware format and clocking.
2201 int snd_soc_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
2203 if (dai->ops && dai->ops->set_fmt)
2204 return dai->ops->set_fmt(dai, fmt);
2208 EXPORT_SYMBOL_GPL(snd_soc_dai_set_fmt);
2211 * snd_soc_dai_set_tdm_slot - configure DAI TDM.
2213 * @tx_mask: bitmask representing active TX slots.
2214 * @rx_mask: bitmask representing active RX slots.
2215 * @slots: Number of slots in use.
2216 * @slot_width: Width in bits for each slot.
2218 * Configures a DAI for TDM operation. Both mask and slots are codec and DAI
2221 int snd_soc_dai_set_tdm_slot(struct snd_soc_dai *dai,
2222 unsigned int tx_mask, unsigned int rx_mask, int slots, int slot_width)
2224 if (dai->ops && dai->ops->set_tdm_slot)
2225 return dai->ops->set_tdm_slot(dai, tx_mask, rx_mask,
2230 EXPORT_SYMBOL_GPL(snd_soc_dai_set_tdm_slot);
2233 * snd_soc_dai_set_channel_map - configure DAI audio channel map
2235 * @tx_num: how many TX channels
2236 * @tx_slot: pointer to an array which imply the TX slot number channel
2238 * @rx_num: how many RX channels
2239 * @rx_slot: pointer to an array which imply the RX slot number channel
2242 * configure the relationship between channel number and TDM slot number.
2244 int snd_soc_dai_set_channel_map(struct snd_soc_dai *dai,
2245 unsigned int tx_num, unsigned int *tx_slot,
2246 unsigned int rx_num, unsigned int *rx_slot)
2248 if (dai->ops && dai->ops->set_channel_map)
2249 return dai->ops->set_channel_map(dai, tx_num, tx_slot,
2254 EXPORT_SYMBOL_GPL(snd_soc_dai_set_channel_map);
2257 * snd_soc_dai_set_tristate - configure DAI system or master clock.
2259 * @tristate: tristate enable
2261 * Tristates the DAI so that others can use it.
2263 int snd_soc_dai_set_tristate(struct snd_soc_dai *dai, int tristate)
2265 if (dai->ops && dai->ops->set_tristate)
2266 return dai->ops->set_tristate(dai, tristate);
2270 EXPORT_SYMBOL_GPL(snd_soc_dai_set_tristate);
2273 * snd_soc_dai_digital_mute - configure DAI system or master clock.
2275 * @mute: mute enable
2277 * Mutes the DAI DAC.
2279 int snd_soc_dai_digital_mute(struct snd_soc_dai *dai, int mute)
2281 if (dai->ops && dai->ops->digital_mute)
2282 return dai->ops->digital_mute(dai, mute);
2286 EXPORT_SYMBOL_GPL(snd_soc_dai_digital_mute);
2289 * snd_soc_register_card - Register a card with the ASoC core
2291 * @card: Card to register
2293 * Note that currently this is an internal only function: it will be
2294 * exposed to machine drivers after further backporting of ASoC v2
2295 * registration APIs.
2297 static int snd_soc_register_card(struct snd_soc_card *card)
2299 if (!card->name || !card->dev)
2302 INIT_LIST_HEAD(&card->list);
2303 card->instantiated = 0;
2305 mutex_lock(&client_mutex);
2306 list_add(&card->list, &card_list);
2307 snd_soc_instantiate_cards();
2308 mutex_unlock(&client_mutex);
2310 dev_dbg(card->dev, "Registered card '%s'\n", card->name);
2316 * snd_soc_unregister_card - Unregister a card with the ASoC core
2318 * @card: Card to unregister
2320 * Note that currently this is an internal only function: it will be
2321 * exposed to machine drivers after further backporting of ASoC v2
2322 * registration APIs.
2324 static int snd_soc_unregister_card(struct snd_soc_card *card)
2326 mutex_lock(&client_mutex);
2327 list_del(&card->list);
2328 mutex_unlock(&client_mutex);
2330 dev_dbg(card->dev, "Unregistered card '%s'\n", card->name);
2335 static struct snd_soc_dai_ops null_dai_ops = {
2339 * snd_soc_register_dai - Register a DAI with the ASoC core
2341 * @dai: DAI to register
2343 int snd_soc_register_dai(struct snd_soc_dai *dai)
2348 /* The device should become mandatory over time */
2350 printk(KERN_WARNING "No device for DAI %s\n", dai->name);
2353 dai->ops = &null_dai_ops;
2355 INIT_LIST_HEAD(&dai->list);
2357 mutex_lock(&client_mutex);
2358 list_add(&dai->list, &dai_list);
2359 snd_soc_instantiate_cards();
2360 mutex_unlock(&client_mutex);
2362 pr_debug("Registered DAI '%s'\n", dai->name);
2366 EXPORT_SYMBOL_GPL(snd_soc_register_dai);
2369 * snd_soc_unregister_dai - Unregister a DAI from the ASoC core
2371 * @dai: DAI to unregister
2373 void snd_soc_unregister_dai(struct snd_soc_dai *dai)
2375 mutex_lock(&client_mutex);
2376 list_del(&dai->list);
2377 mutex_unlock(&client_mutex);
2379 pr_debug("Unregistered DAI '%s'\n", dai->name);
2381 EXPORT_SYMBOL_GPL(snd_soc_unregister_dai);
2384 * snd_soc_register_dais - Register multiple DAIs with the ASoC core
2386 * @dai: Array of DAIs to register
2387 * @count: Number of DAIs
2389 int snd_soc_register_dais(struct snd_soc_dai *dai, size_t count)
2393 for (i = 0; i < count; i++) {
2394 ret = snd_soc_register_dai(&dai[i]);
2402 for (i--; i >= 0; i--)
2403 snd_soc_unregister_dai(&dai[i]);
2407 EXPORT_SYMBOL_GPL(snd_soc_register_dais);
2410 * snd_soc_unregister_dais - Unregister multiple DAIs from the ASoC core
2412 * @dai: Array of DAIs to unregister
2413 * @count: Number of DAIs
2415 void snd_soc_unregister_dais(struct snd_soc_dai *dai, size_t count)
2419 for (i = 0; i < count; i++)
2420 snd_soc_unregister_dai(&dai[i]);
2422 EXPORT_SYMBOL_GPL(snd_soc_unregister_dais);
2425 * snd_soc_register_platform - Register a platform with the ASoC core
2427 * @platform: platform to register
2429 int snd_soc_register_platform(struct snd_soc_platform *platform)
2431 if (!platform->name)
2434 INIT_LIST_HEAD(&platform->list);
2436 mutex_lock(&client_mutex);
2437 list_add(&platform->list, &platform_list);
2438 snd_soc_instantiate_cards();
2439 mutex_unlock(&client_mutex);
2441 pr_debug("Registered platform '%s'\n", platform->name);
2445 EXPORT_SYMBOL_GPL(snd_soc_register_platform);
2448 * snd_soc_unregister_platform - Unregister a platform from the ASoC core
2450 * @platform: platform to unregister
2452 void snd_soc_unregister_platform(struct snd_soc_platform *platform)
2454 mutex_lock(&client_mutex);
2455 list_del(&platform->list);
2456 mutex_unlock(&client_mutex);
2458 pr_debug("Unregistered platform '%s'\n", platform->name);
2460 EXPORT_SYMBOL_GPL(snd_soc_unregister_platform);
2462 static u64 codec_format_map[] = {
2463 SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S16_BE,
2464 SNDRV_PCM_FMTBIT_U16_LE | SNDRV_PCM_FMTBIT_U16_BE,
2465 SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S24_BE,
2466 SNDRV_PCM_FMTBIT_U24_LE | SNDRV_PCM_FMTBIT_U24_BE,
2467 SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_S32_BE,
2468 SNDRV_PCM_FMTBIT_U32_LE | SNDRV_PCM_FMTBIT_U32_BE,
2469 SNDRV_PCM_FMTBIT_S24_3LE | SNDRV_PCM_FMTBIT_U24_3BE,
2470 SNDRV_PCM_FMTBIT_U24_3LE | SNDRV_PCM_FMTBIT_U24_3BE,
2471 SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S20_3BE,
2472 SNDRV_PCM_FMTBIT_U20_3LE | SNDRV_PCM_FMTBIT_U20_3BE,
2473 SNDRV_PCM_FMTBIT_S18_3LE | SNDRV_PCM_FMTBIT_S18_3BE,
2474 SNDRV_PCM_FMTBIT_U18_3LE | SNDRV_PCM_FMTBIT_U18_3BE,
2475 SNDRV_PCM_FMTBIT_FLOAT_LE | SNDRV_PCM_FMTBIT_FLOAT_BE,
2476 SNDRV_PCM_FMTBIT_FLOAT64_LE | SNDRV_PCM_FMTBIT_FLOAT64_BE,
2477 SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE
2478 | SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_BE,
2481 /* Fix up the DAI formats for endianness: codecs don't actually see
2482 * the endianness of the data but we're using the CPU format
2483 * definitions which do need to include endianness so we ensure that
2484 * codec DAIs always have both big and little endian variants set.
2486 static void fixup_codec_formats(struct snd_soc_pcm_stream *stream)
2490 for (i = 0; i < ARRAY_SIZE(codec_format_map); i++)
2491 if (stream->formats & codec_format_map[i])
2492 stream->formats |= codec_format_map[i];
2496 * snd_soc_register_codec - Register a codec with the ASoC core
2498 * @codec: codec to register
2500 int snd_soc_register_codec(struct snd_soc_codec *codec)
2507 /* The device should become mandatory over time */
2509 printk(KERN_WARNING "No device for codec %s\n", codec->name);
2511 INIT_LIST_HEAD(&codec->list);
2513 for (i = 0; i < codec->num_dai; i++) {
2514 fixup_codec_formats(&codec->dai[i].playback);
2515 fixup_codec_formats(&codec->dai[i].capture);
2518 mutex_lock(&client_mutex);
2519 list_add(&codec->list, &codec_list);
2520 snd_soc_instantiate_cards();
2521 mutex_unlock(&client_mutex);
2523 pr_debug("Registered codec '%s'\n", codec->name);
2527 EXPORT_SYMBOL_GPL(snd_soc_register_codec);
2530 * snd_soc_unregister_codec - Unregister a codec from the ASoC core
2532 * @codec: codec to unregister
2534 void snd_soc_unregister_codec(struct snd_soc_codec *codec)
2536 mutex_lock(&client_mutex);
2537 list_del(&codec->list);
2538 mutex_unlock(&client_mutex);
2540 pr_debug("Unregistered codec '%s'\n", codec->name);
2542 EXPORT_SYMBOL_GPL(snd_soc_unregister_codec);
2544 static int __init snd_soc_init(void)
2546 #ifdef CONFIG_DEBUG_FS
2547 debugfs_root = debugfs_create_dir("asoc", NULL);
2548 if (IS_ERR(debugfs_root) || !debugfs_root) {
2550 "ASoC: Failed to create debugfs directory\n");
2551 debugfs_root = NULL;
2555 return platform_driver_register(&soc_driver);
2558 static void __exit snd_soc_exit(void)
2560 #ifdef CONFIG_DEBUG_FS
2561 debugfs_remove_recursive(debugfs_root);
2563 platform_driver_unregister(&soc_driver);
2566 module_init(snd_soc_init);
2567 module_exit(snd_soc_exit);
2569 /* Module information */
2570 MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
2571 MODULE_DESCRIPTION("ALSA SoC Core");
2572 MODULE_LICENSE("GPL");
2573 MODULE_ALIAS("platform:soc-audio");