2 * soc-core.c -- ALSA SoC Audio Layer
4 * Copyright 2005 Wolfson Microelectronics PLC.
5 * Copyright 2005 Openedhand Ltd.
7 * Author: Liam Girdwood <lrg@slimlogic.co.uk>
8 * with code, comments and ideas from :-
9 * Richard Purdie <richard@openedhand.com>
11 * This program is free software; you can redistribute it and/or modify it
12 * under the terms of the GNU General Public License as published by the
13 * Free Software Foundation; either version 2 of the License, or (at your
14 * option) any later version.
17 * o Add hw rules to enforce rates, etc.
18 * o More testing with other codecs/machines.
19 * o Add more codecs and platforms to ensure good API coverage.
20 * o Support TDM on PCM and I2S
23 #include <linux/module.h>
24 #include <linux/moduleparam.h>
25 #include <linux/init.h>
26 #include <linux/delay.h>
28 #include <linux/bitops.h>
29 #include <linux/debugfs.h>
30 #include <linux/platform_device.h>
31 #include <sound/core.h>
32 #include <sound/pcm.h>
33 #include <sound/pcm_params.h>
34 #include <sound/soc.h>
35 #include <sound/soc-dapm.h>
36 #include <sound/initval.h>
38 static DEFINE_MUTEX(pcm_mutex);
39 static DEFINE_MUTEX(io_mutex);
40 static DECLARE_WAIT_QUEUE_HEAD(soc_pm_waitq);
42 #ifdef CONFIG_DEBUG_FS
43 static struct dentry *debugfs_root;
46 static DEFINE_MUTEX(client_mutex);
47 static LIST_HEAD(card_list);
48 static LIST_HEAD(dai_list);
49 static LIST_HEAD(platform_list);
51 static int snd_soc_register_card(struct snd_soc_card *card);
52 static int snd_soc_unregister_card(struct snd_soc_card *card);
55 * This is a timeout to do a DAPM powerdown after a stream is closed().
56 * It can be used to eliminate pops between different playback streams, e.g.
57 * between two audio tracks.
59 static int pmdown_time = 5000;
60 module_param(pmdown_time, int, 0);
61 MODULE_PARM_DESC(pmdown_time, "DAPM stream powerdown time (msecs)");
64 * This function forces any delayed work to be queued and run.
66 static int run_delayed_work(struct delayed_work *dwork)
70 /* cancel any work waiting to be queued. */
71 ret = cancel_delayed_work(dwork);
73 /* if there was any work waiting then we run it now and
74 * wait for it's completion */
76 schedule_delayed_work(dwork, 0);
77 flush_scheduled_work();
82 #ifdef CONFIG_SND_SOC_AC97_BUS
83 /* unregister ac97 codec */
84 static int soc_ac97_dev_unregister(struct snd_soc_codec *codec)
86 if (codec->ac97->dev.bus)
87 device_unregister(&codec->ac97->dev);
91 /* stop no dev release warning */
92 static void soc_ac97_device_release(struct device *dev){}
94 /* register ac97 codec to bus */
95 static int soc_ac97_dev_register(struct snd_soc_codec *codec)
99 codec->ac97->dev.bus = &ac97_bus_type;
100 codec->ac97->dev.parent = NULL;
101 codec->ac97->dev.release = soc_ac97_device_release;
103 dev_set_name(&codec->ac97->dev, "%d-%d:%s",
104 codec->card->number, 0, codec->name);
105 err = device_register(&codec->ac97->dev);
107 snd_printk(KERN_ERR "Can't register ac97 bus\n");
108 codec->ac97->dev.bus = NULL;
116 * Called by ALSA when a PCM substream is opened, the runtime->hw record is
117 * then initialized and any private data can be allocated. This also calls
118 * startup for the cpu DAI, platform, machine and codec DAI.
120 static int soc_pcm_open(struct snd_pcm_substream *substream)
122 struct snd_soc_pcm_runtime *rtd = substream->private_data;
123 struct snd_soc_device *socdev = rtd->socdev;
124 struct snd_soc_card *card = socdev->card;
125 struct snd_pcm_runtime *runtime = substream->runtime;
126 struct snd_soc_dai_link *machine = rtd->dai;
127 struct snd_soc_platform *platform = card->platform;
128 struct snd_soc_dai *cpu_dai = machine->cpu_dai;
129 struct snd_soc_dai *codec_dai = machine->codec_dai;
132 mutex_lock(&pcm_mutex);
134 /* startup the audio subsystem */
135 if (cpu_dai->ops.startup) {
136 ret = cpu_dai->ops.startup(substream, cpu_dai);
138 printk(KERN_ERR "asoc: can't open interface %s\n",
144 if (platform->pcm_ops->open) {
145 ret = platform->pcm_ops->open(substream);
147 printk(KERN_ERR "asoc: can't open platform %s\n", platform->name);
152 if (codec_dai->ops.startup) {
153 ret = codec_dai->ops.startup(substream, codec_dai);
155 printk(KERN_ERR "asoc: can't open codec %s\n",
161 if (machine->ops && machine->ops->startup) {
162 ret = machine->ops->startup(substream);
164 printk(KERN_ERR "asoc: %s startup failed\n", machine->name);
169 /* Check that the codec and cpu DAI's are compatible */
170 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
171 runtime->hw.rate_min =
172 max(codec_dai->playback.rate_min,
173 cpu_dai->playback.rate_min);
174 runtime->hw.rate_max =
175 min(codec_dai->playback.rate_max,
176 cpu_dai->playback.rate_max);
177 runtime->hw.channels_min =
178 max(codec_dai->playback.channels_min,
179 cpu_dai->playback.channels_min);
180 runtime->hw.channels_max =
181 min(codec_dai->playback.channels_max,
182 cpu_dai->playback.channels_max);
183 runtime->hw.formats =
184 codec_dai->playback.formats & cpu_dai->playback.formats;
186 codec_dai->playback.rates & cpu_dai->playback.rates;
188 runtime->hw.rate_min =
189 max(codec_dai->capture.rate_min,
190 cpu_dai->capture.rate_min);
191 runtime->hw.rate_max =
192 min(codec_dai->capture.rate_max,
193 cpu_dai->capture.rate_max);
194 runtime->hw.channels_min =
195 max(codec_dai->capture.channels_min,
196 cpu_dai->capture.channels_min);
197 runtime->hw.channels_max =
198 min(codec_dai->capture.channels_max,
199 cpu_dai->capture.channels_max);
200 runtime->hw.formats =
201 codec_dai->capture.formats & cpu_dai->capture.formats;
203 codec_dai->capture.rates & cpu_dai->capture.rates;
206 snd_pcm_limit_hw_rates(runtime);
207 if (!runtime->hw.rates) {
208 printk(KERN_ERR "asoc: %s <-> %s No matching rates\n",
209 codec_dai->name, cpu_dai->name);
212 if (!runtime->hw.formats) {
213 printk(KERN_ERR "asoc: %s <-> %s No matching formats\n",
214 codec_dai->name, cpu_dai->name);
217 if (!runtime->hw.channels_min || !runtime->hw.channels_max) {
218 printk(KERN_ERR "asoc: %s <-> %s No matching channels\n",
219 codec_dai->name, cpu_dai->name);
223 pr_debug("asoc: %s <-> %s info:\n", codec_dai->name, cpu_dai->name);
224 pr_debug("asoc: rate mask 0x%x\n", runtime->hw.rates);
225 pr_debug("asoc: min ch %d max ch %d\n", runtime->hw.channels_min,
226 runtime->hw.channels_max);
227 pr_debug("asoc: min rate %d max rate %d\n", runtime->hw.rate_min,
228 runtime->hw.rate_max);
230 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
231 cpu_dai->playback.active = codec_dai->playback.active = 1;
233 cpu_dai->capture.active = codec_dai->capture.active = 1;
234 cpu_dai->active = codec_dai->active = 1;
235 cpu_dai->runtime = runtime;
236 socdev->codec->active++;
237 mutex_unlock(&pcm_mutex);
241 if (machine->ops && machine->ops->shutdown)
242 machine->ops->shutdown(substream);
245 if (platform->pcm_ops->close)
246 platform->pcm_ops->close(substream);
249 if (cpu_dai->ops.shutdown)
250 cpu_dai->ops.shutdown(substream, cpu_dai);
252 mutex_unlock(&pcm_mutex);
257 * Power down the audio subsystem pmdown_time msecs after close is called.
258 * This is to ensure there are no pops or clicks in between any music tracks
259 * due to DAPM power cycling.
261 static void close_delayed_work(struct work_struct *work)
263 struct snd_soc_card *card = container_of(work, struct snd_soc_card,
265 struct snd_soc_device *socdev = card->socdev;
266 struct snd_soc_codec *codec = socdev->codec;
267 struct snd_soc_dai *codec_dai;
270 mutex_lock(&pcm_mutex);
271 for (i = 0; i < codec->num_dai; i++) {
272 codec_dai = &codec->dai[i];
274 pr_debug("pop wq checking: %s status: %s waiting: %s\n",
275 codec_dai->playback.stream_name,
276 codec_dai->playback.active ? "active" : "inactive",
277 codec_dai->pop_wait ? "yes" : "no");
279 /* are we waiting on this codec DAI stream */
280 if (codec_dai->pop_wait == 1) {
282 /* Reduce power if no longer active */
283 if (codec->active == 0) {
284 pr_debug("pop wq D1 %s %s\n", codec->name,
285 codec_dai->playback.stream_name);
286 snd_soc_dapm_set_bias_level(socdev,
287 SND_SOC_BIAS_PREPARE);
290 codec_dai->pop_wait = 0;
291 snd_soc_dapm_stream_event(codec,
292 codec_dai->playback.stream_name,
293 SND_SOC_DAPM_STREAM_STOP);
295 /* Fall into standby if no longer active */
296 if (codec->active == 0) {
297 pr_debug("pop wq D3 %s %s\n", codec->name,
298 codec_dai->playback.stream_name);
299 snd_soc_dapm_set_bias_level(socdev,
300 SND_SOC_BIAS_STANDBY);
304 mutex_unlock(&pcm_mutex);
308 * Called by ALSA when a PCM substream is closed. Private data can be
309 * freed here. The cpu DAI, codec DAI, machine and platform are also
312 static int soc_codec_close(struct snd_pcm_substream *substream)
314 struct snd_soc_pcm_runtime *rtd = substream->private_data;
315 struct snd_soc_device *socdev = rtd->socdev;
316 struct snd_soc_card *card = socdev->card;
317 struct snd_soc_dai_link *machine = rtd->dai;
318 struct snd_soc_platform *platform = card->platform;
319 struct snd_soc_dai *cpu_dai = machine->cpu_dai;
320 struct snd_soc_dai *codec_dai = machine->codec_dai;
321 struct snd_soc_codec *codec = socdev->codec;
323 mutex_lock(&pcm_mutex);
325 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
326 cpu_dai->playback.active = codec_dai->playback.active = 0;
328 cpu_dai->capture.active = codec_dai->capture.active = 0;
330 if (codec_dai->playback.active == 0 &&
331 codec_dai->capture.active == 0) {
332 cpu_dai->active = codec_dai->active = 0;
336 /* Muting the DAC suppresses artifacts caused during digital
337 * shutdown, for example from stopping clocks.
339 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
340 snd_soc_dai_digital_mute(codec_dai, 1);
342 if (cpu_dai->ops.shutdown)
343 cpu_dai->ops.shutdown(substream, cpu_dai);
345 if (codec_dai->ops.shutdown)
346 codec_dai->ops.shutdown(substream, codec_dai);
348 if (machine->ops && machine->ops->shutdown)
349 machine->ops->shutdown(substream);
351 if (platform->pcm_ops->close)
352 platform->pcm_ops->close(substream);
353 cpu_dai->runtime = NULL;
355 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
356 /* start delayed pop wq here for playback streams */
357 codec_dai->pop_wait = 1;
358 schedule_delayed_work(&card->delayed_work,
359 msecs_to_jiffies(pmdown_time));
361 /* capture streams can be powered down now */
362 snd_soc_dapm_stream_event(codec,
363 codec_dai->capture.stream_name,
364 SND_SOC_DAPM_STREAM_STOP);
366 if (codec->active == 0 && codec_dai->pop_wait == 0)
367 snd_soc_dapm_set_bias_level(socdev,
368 SND_SOC_BIAS_STANDBY);
371 mutex_unlock(&pcm_mutex);
376 * Called by ALSA when the PCM substream is prepared, can set format, sample
377 * rate, etc. This function is non atomic and can be called multiple times,
378 * it can refer to the runtime info.
380 static int soc_pcm_prepare(struct snd_pcm_substream *substream)
382 struct snd_soc_pcm_runtime *rtd = substream->private_data;
383 struct snd_soc_device *socdev = rtd->socdev;
384 struct snd_soc_card *card = socdev->card;
385 struct snd_soc_dai_link *machine = rtd->dai;
386 struct snd_soc_platform *platform = card->platform;
387 struct snd_soc_dai *cpu_dai = machine->cpu_dai;
388 struct snd_soc_dai *codec_dai = machine->codec_dai;
389 struct snd_soc_codec *codec = socdev->codec;
392 mutex_lock(&pcm_mutex);
394 if (machine->ops && machine->ops->prepare) {
395 ret = machine->ops->prepare(substream);
397 printk(KERN_ERR "asoc: machine prepare error\n");
402 if (platform->pcm_ops->prepare) {
403 ret = platform->pcm_ops->prepare(substream);
405 printk(KERN_ERR "asoc: platform prepare error\n");
410 if (codec_dai->ops.prepare) {
411 ret = codec_dai->ops.prepare(substream, codec_dai);
413 printk(KERN_ERR "asoc: codec DAI prepare error\n");
418 if (cpu_dai->ops.prepare) {
419 ret = cpu_dai->ops.prepare(substream, cpu_dai);
421 printk(KERN_ERR "asoc: cpu DAI prepare error\n");
426 /* cancel any delayed stream shutdown that is pending */
427 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
428 codec_dai->pop_wait) {
429 codec_dai->pop_wait = 0;
430 cancel_delayed_work(&card->delayed_work);
433 /* do we need to power up codec */
434 if (codec->bias_level != SND_SOC_BIAS_ON) {
435 snd_soc_dapm_set_bias_level(socdev,
436 SND_SOC_BIAS_PREPARE);
438 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
439 snd_soc_dapm_stream_event(codec,
440 codec_dai->playback.stream_name,
441 SND_SOC_DAPM_STREAM_START);
443 snd_soc_dapm_stream_event(codec,
444 codec_dai->capture.stream_name,
445 SND_SOC_DAPM_STREAM_START);
447 snd_soc_dapm_set_bias_level(socdev, SND_SOC_BIAS_ON);
448 snd_soc_dai_digital_mute(codec_dai, 0);
451 /* codec already powered - power on widgets */
452 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
453 snd_soc_dapm_stream_event(codec,
454 codec_dai->playback.stream_name,
455 SND_SOC_DAPM_STREAM_START);
457 snd_soc_dapm_stream_event(codec,
458 codec_dai->capture.stream_name,
459 SND_SOC_DAPM_STREAM_START);
461 snd_soc_dai_digital_mute(codec_dai, 0);
465 mutex_unlock(&pcm_mutex);
470 * Called by ALSA when the hardware params are set by application. This
471 * function can also be called multiple times and can allocate buffers
472 * (using snd_pcm_lib_* ). It's non-atomic.
474 static int soc_pcm_hw_params(struct snd_pcm_substream *substream,
475 struct snd_pcm_hw_params *params)
477 struct snd_soc_pcm_runtime *rtd = substream->private_data;
478 struct snd_soc_device *socdev = rtd->socdev;
479 struct snd_soc_dai_link *machine = rtd->dai;
480 struct snd_soc_card *card = socdev->card;
481 struct snd_soc_platform *platform = card->platform;
482 struct snd_soc_dai *cpu_dai = machine->cpu_dai;
483 struct snd_soc_dai *codec_dai = machine->codec_dai;
486 mutex_lock(&pcm_mutex);
488 if (machine->ops && machine->ops->hw_params) {
489 ret = machine->ops->hw_params(substream, params);
491 printk(KERN_ERR "asoc: machine hw_params failed\n");
496 if (codec_dai->ops.hw_params) {
497 ret = codec_dai->ops.hw_params(substream, params, codec_dai);
499 printk(KERN_ERR "asoc: can't set codec %s hw params\n",
505 if (cpu_dai->ops.hw_params) {
506 ret = cpu_dai->ops.hw_params(substream, params, cpu_dai);
508 printk(KERN_ERR "asoc: interface %s hw params failed\n",
514 if (platform->pcm_ops->hw_params) {
515 ret = platform->pcm_ops->hw_params(substream, params);
517 printk(KERN_ERR "asoc: platform %s hw params failed\n",
524 mutex_unlock(&pcm_mutex);
528 if (cpu_dai->ops.hw_free)
529 cpu_dai->ops.hw_free(substream, cpu_dai);
532 if (codec_dai->ops.hw_free)
533 codec_dai->ops.hw_free(substream, codec_dai);
536 if (machine->ops && machine->ops->hw_free)
537 machine->ops->hw_free(substream);
539 mutex_unlock(&pcm_mutex);
544 * Free's resources allocated by hw_params, can be called multiple times
546 static int soc_pcm_hw_free(struct snd_pcm_substream *substream)
548 struct snd_soc_pcm_runtime *rtd = substream->private_data;
549 struct snd_soc_device *socdev = rtd->socdev;
550 struct snd_soc_dai_link *machine = rtd->dai;
551 struct snd_soc_card *card = socdev->card;
552 struct snd_soc_platform *platform = card->platform;
553 struct snd_soc_dai *cpu_dai = machine->cpu_dai;
554 struct snd_soc_dai *codec_dai = machine->codec_dai;
555 struct snd_soc_codec *codec = socdev->codec;
557 mutex_lock(&pcm_mutex);
559 /* apply codec digital mute */
561 snd_soc_dai_digital_mute(codec_dai, 1);
563 /* free any machine hw params */
564 if (machine->ops && machine->ops->hw_free)
565 machine->ops->hw_free(substream);
567 /* free any DMA resources */
568 if (platform->pcm_ops->hw_free)
569 platform->pcm_ops->hw_free(substream);
571 /* now free hw params for the DAI's */
572 if (codec_dai->ops.hw_free)
573 codec_dai->ops.hw_free(substream, codec_dai);
575 if (cpu_dai->ops.hw_free)
576 cpu_dai->ops.hw_free(substream, cpu_dai);
578 mutex_unlock(&pcm_mutex);
582 static int soc_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
584 struct snd_soc_pcm_runtime *rtd = substream->private_data;
585 struct snd_soc_device *socdev = rtd->socdev;
586 struct snd_soc_card *card= socdev->card;
587 struct snd_soc_dai_link *machine = rtd->dai;
588 struct snd_soc_platform *platform = card->platform;
589 struct snd_soc_dai *cpu_dai = machine->cpu_dai;
590 struct snd_soc_dai *codec_dai = machine->codec_dai;
593 if (codec_dai->ops.trigger) {
594 ret = codec_dai->ops.trigger(substream, cmd, codec_dai);
599 if (platform->pcm_ops->trigger) {
600 ret = platform->pcm_ops->trigger(substream, cmd);
605 if (cpu_dai->ops.trigger) {
606 ret = cpu_dai->ops.trigger(substream, cmd, cpu_dai);
613 /* ASoC PCM operations */
614 static struct snd_pcm_ops soc_pcm_ops = {
615 .open = soc_pcm_open,
616 .close = soc_codec_close,
617 .hw_params = soc_pcm_hw_params,
618 .hw_free = soc_pcm_hw_free,
619 .prepare = soc_pcm_prepare,
620 .trigger = soc_pcm_trigger,
624 /* powers down audio subsystem for suspend */
625 static int soc_suspend(struct platform_device *pdev, pm_message_t state)
627 struct snd_soc_device *socdev = platform_get_drvdata(pdev);
628 struct snd_soc_card *card = socdev->card;
629 struct snd_soc_platform *platform = card->platform;
630 struct snd_soc_codec_device *codec_dev = socdev->codec_dev;
631 struct snd_soc_codec *codec = socdev->codec;
634 /* Due to the resume being scheduled into a workqueue we could
635 * suspend before that's finished - wait for it to complete.
637 snd_power_lock(codec->card);
638 snd_power_wait(codec->card, SNDRV_CTL_POWER_D0);
639 snd_power_unlock(codec->card);
641 /* we're going to block userspace touching us until resume completes */
642 snd_power_change_state(codec->card, SNDRV_CTL_POWER_D3hot);
644 /* mute any active DAC's */
645 for (i = 0; i < card->num_links; i++) {
646 struct snd_soc_dai *dai = card->dai_link[i].codec_dai;
647 if (dai->ops.digital_mute && dai->playback.active)
648 dai->ops.digital_mute(dai, 1);
651 /* suspend all pcms */
652 for (i = 0; i < card->num_links; i++)
653 snd_pcm_suspend_all(card->dai_link[i].pcm);
655 if (card->suspend_pre)
656 card->suspend_pre(pdev, state);
658 for (i = 0; i < card->num_links; i++) {
659 struct snd_soc_dai *cpu_dai = card->dai_link[i].cpu_dai;
660 if (cpu_dai->suspend && !cpu_dai->ac97_control)
661 cpu_dai->suspend(cpu_dai);
662 if (platform->suspend)
663 platform->suspend(cpu_dai);
666 /* close any waiting streams and save state */
667 run_delayed_work(&card->delayed_work);
668 codec->suspend_bias_level = codec->bias_level;
670 for (i = 0; i < codec->num_dai; i++) {
671 char *stream = codec->dai[i].playback.stream_name;
673 snd_soc_dapm_stream_event(codec, stream,
674 SND_SOC_DAPM_STREAM_SUSPEND);
675 stream = codec->dai[i].capture.stream_name;
677 snd_soc_dapm_stream_event(codec, stream,
678 SND_SOC_DAPM_STREAM_SUSPEND);
681 if (codec_dev->suspend)
682 codec_dev->suspend(pdev, state);
684 for (i = 0; i < card->num_links; i++) {
685 struct snd_soc_dai *cpu_dai = card->dai_link[i].cpu_dai;
686 if (cpu_dai->suspend && cpu_dai->ac97_control)
687 cpu_dai->suspend(cpu_dai);
690 if (card->suspend_post)
691 card->suspend_post(pdev, state);
696 /* deferred resume work, so resume can complete before we finished
697 * setting our codec back up, which can be very slow on I2C
699 static void soc_resume_deferred(struct work_struct *work)
701 struct snd_soc_card *card = container_of(work,
703 deferred_resume_work);
704 struct snd_soc_device *socdev = card->socdev;
705 struct snd_soc_platform *platform = card->platform;
706 struct snd_soc_codec_device *codec_dev = socdev->codec_dev;
707 struct snd_soc_codec *codec = socdev->codec;
708 struct platform_device *pdev = to_platform_device(socdev->dev);
711 /* our power state is still SNDRV_CTL_POWER_D3hot from suspend time,
712 * so userspace apps are blocked from touching us
715 dev_dbg(socdev->dev, "starting resume work\n");
717 if (card->resume_pre)
718 card->resume_pre(pdev);
720 for (i = 0; i < card->num_links; i++) {
721 struct snd_soc_dai *cpu_dai = card->dai_link[i].cpu_dai;
722 if (cpu_dai->resume && cpu_dai->ac97_control)
723 cpu_dai->resume(cpu_dai);
726 if (codec_dev->resume)
727 codec_dev->resume(pdev);
729 for (i = 0; i < codec->num_dai; i++) {
730 char *stream = codec->dai[i].playback.stream_name;
732 snd_soc_dapm_stream_event(codec, stream,
733 SND_SOC_DAPM_STREAM_RESUME);
734 stream = codec->dai[i].capture.stream_name;
736 snd_soc_dapm_stream_event(codec, stream,
737 SND_SOC_DAPM_STREAM_RESUME);
740 /* unmute any active DACs */
741 for (i = 0; i < card->num_links; i++) {
742 struct snd_soc_dai *dai = card->dai_link[i].codec_dai;
743 if (dai->ops.digital_mute && dai->playback.active)
744 dai->ops.digital_mute(dai, 0);
747 for (i = 0; i < card->num_links; i++) {
748 struct snd_soc_dai *cpu_dai = card->dai_link[i].cpu_dai;
749 if (cpu_dai->resume && !cpu_dai->ac97_control)
750 cpu_dai->resume(cpu_dai);
751 if (platform->resume)
752 platform->resume(cpu_dai);
755 if (card->resume_post)
756 card->resume_post(pdev);
758 dev_dbg(socdev->dev, "resume work completed\n");
760 /* userspace can access us now we are back as we were before */
761 snd_power_change_state(codec->card, SNDRV_CTL_POWER_D0);
764 /* powers up audio subsystem after a suspend */
765 static int soc_resume(struct platform_device *pdev)
767 struct snd_soc_device *socdev = platform_get_drvdata(pdev);
768 struct snd_soc_card *card = socdev->card;
770 dev_dbg(socdev->dev, "scheduling resume work\n");
772 if (!schedule_work(&card->deferred_resume_work))
773 dev_err(socdev->dev, "resume work item may be lost\n");
779 #define soc_suspend NULL
780 #define soc_resume NULL
783 static void snd_soc_instantiate_card(struct snd_soc_card *card)
785 struct platform_device *pdev = container_of(card->dev,
786 struct platform_device,
788 struct snd_soc_codec_device *codec_dev = card->socdev->codec_dev;
789 struct snd_soc_platform *platform;
790 struct snd_soc_dai *dai;
793 if (card->instantiated)
797 list_for_each_entry(platform, &platform_list, list)
798 if (card->platform == platform) {
803 dev_dbg(card->dev, "Platform %s not registered\n",
804 card->platform->name);
808 for (i = 0; i < card->num_links; i++) {
810 list_for_each_entry(dai, &dai_list, list)
811 if (card->dai_link[i].cpu_dai == dai) {
816 dev_dbg(card->dev, "DAI %s not registered\n",
817 card->dai_link[i].cpu_dai->name);
822 /* Note that we do not current check for codec components */
824 dev_dbg(card->dev, "All components present, instantiating\n");
826 /* Found everything, bring it up */
828 ret = card->probe(pdev);
833 for (i = 0; i < card->num_links; i++) {
834 struct snd_soc_dai *cpu_dai = card->dai_link[i].cpu_dai;
835 if (cpu_dai->probe) {
836 ret = cpu_dai->probe(pdev, cpu_dai);
842 if (codec_dev->probe) {
843 ret = codec_dev->probe(pdev);
848 if (platform->probe) {
849 ret = platform->probe(pdev);
854 /* DAPM stream work */
855 INIT_DELAYED_WORK(&card->delayed_work, close_delayed_work);
857 /* deferred resume work */
858 INIT_WORK(&card->deferred_resume_work, soc_resume_deferred);
861 card->instantiated = 1;
866 if (codec_dev->remove)
867 codec_dev->remove(pdev);
870 for (i--; i >= 0; i--) {
871 struct snd_soc_dai *cpu_dai = card->dai_link[i].cpu_dai;
873 cpu_dai->remove(pdev, cpu_dai);
881 * Attempt to initialise any uninitalised cards. Must be called with
884 static void snd_soc_instantiate_cards(void)
886 struct snd_soc_card *card;
887 list_for_each_entry(card, &card_list, list)
888 snd_soc_instantiate_card(card);
891 /* probes a new socdev */
892 static int soc_probe(struct platform_device *pdev)
895 struct snd_soc_device *socdev = platform_get_drvdata(pdev);
896 struct snd_soc_card *card = socdev->card;
898 /* Bodge while we push things out of socdev */
899 card->socdev = socdev;
901 /* Bodge while we unpick instantiation */
902 card->dev = &pdev->dev;
903 ret = snd_soc_register_card(card);
905 dev_err(&pdev->dev, "Failed to register card\n");
912 /* removes a socdev */
913 static int soc_remove(struct platform_device *pdev)
916 struct snd_soc_device *socdev = platform_get_drvdata(pdev);
917 struct snd_soc_card *card = socdev->card;
918 struct snd_soc_platform *platform = card->platform;
919 struct snd_soc_codec_device *codec_dev = socdev->codec_dev;
921 run_delayed_work(&card->delayed_work);
923 if (platform->remove)
924 platform->remove(pdev);
926 if (codec_dev->remove)
927 codec_dev->remove(pdev);
929 for (i = 0; i < card->num_links; i++) {
930 struct snd_soc_dai *cpu_dai = card->dai_link[i].cpu_dai;
932 cpu_dai->remove(pdev, cpu_dai);
938 snd_soc_unregister_card(card);
943 /* ASoC platform driver */
944 static struct platform_driver soc_driver = {
947 .owner = THIS_MODULE,
950 .remove = soc_remove,
951 .suspend = soc_suspend,
952 .resume = soc_resume,
955 /* create a new pcm */
956 static int soc_new_pcm(struct snd_soc_device *socdev,
957 struct snd_soc_dai_link *dai_link, int num)
959 struct snd_soc_codec *codec = socdev->codec;
960 struct snd_soc_card *card = socdev->card;
961 struct snd_soc_platform *platform = card->platform;
962 struct snd_soc_dai *codec_dai = dai_link->codec_dai;
963 struct snd_soc_dai *cpu_dai = dai_link->cpu_dai;
964 struct snd_soc_pcm_runtime *rtd;
967 int ret = 0, playback = 0, capture = 0;
969 rtd = kzalloc(sizeof(struct snd_soc_pcm_runtime), GFP_KERNEL);
974 rtd->socdev = socdev;
975 codec_dai->codec = socdev->codec;
977 /* check client and interface hw capabilities */
978 sprintf(new_name, "%s %s-%d", dai_link->stream_name, codec_dai->name,
981 if (codec_dai->playback.channels_min)
983 if (codec_dai->capture.channels_min)
986 ret = snd_pcm_new(codec->card, new_name, codec->pcm_devs++, playback,
989 printk(KERN_ERR "asoc: can't create pcm for codec %s\n",
996 pcm->private_data = rtd;
997 soc_pcm_ops.mmap = platform->pcm_ops->mmap;
998 soc_pcm_ops.pointer = platform->pcm_ops->pointer;
999 soc_pcm_ops.ioctl = platform->pcm_ops->ioctl;
1000 soc_pcm_ops.copy = platform->pcm_ops->copy;
1001 soc_pcm_ops.silence = platform->pcm_ops->silence;
1002 soc_pcm_ops.ack = platform->pcm_ops->ack;
1003 soc_pcm_ops.page = platform->pcm_ops->page;
1006 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &soc_pcm_ops);
1009 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &soc_pcm_ops);
1011 ret = platform->pcm_new(codec->card, codec_dai, pcm);
1013 printk(KERN_ERR "asoc: platform pcm constructor failed\n");
1018 pcm->private_free = platform->pcm_free;
1019 printk(KERN_INFO "asoc: %s <-> %s mapping ok\n", codec_dai->name,
1024 /* codec register dump */
1025 static ssize_t soc_codec_reg_show(struct snd_soc_device *devdata, char *buf)
1027 struct snd_soc_codec *codec = devdata->codec;
1028 int i, step = 1, count = 0;
1030 if (!codec->reg_cache_size)
1033 if (codec->reg_cache_step)
1034 step = codec->reg_cache_step;
1036 count += sprintf(buf, "%s registers\n", codec->name);
1037 for (i = 0; i < codec->reg_cache_size; i += step) {
1038 count += sprintf(buf + count, "%2x: ", i);
1039 if (count >= PAGE_SIZE - 1)
1042 if (codec->display_register)
1043 count += codec->display_register(codec, buf + count,
1044 PAGE_SIZE - count, i);
1046 count += snprintf(buf + count, PAGE_SIZE - count,
1047 "%4x", codec->read(codec, i));
1049 if (count >= PAGE_SIZE - 1)
1052 count += snprintf(buf + count, PAGE_SIZE - count, "\n");
1053 if (count >= PAGE_SIZE - 1)
1057 /* Truncate count; min() would cause a warning */
1058 if (count >= PAGE_SIZE)
1059 count = PAGE_SIZE - 1;
1063 static ssize_t codec_reg_show(struct device *dev,
1064 struct device_attribute *attr, char *buf)
1066 struct snd_soc_device *devdata = dev_get_drvdata(dev);
1067 return soc_codec_reg_show(devdata, buf);
1070 static DEVICE_ATTR(codec_reg, 0444, codec_reg_show, NULL);
1072 #ifdef CONFIG_DEBUG_FS
1073 static int codec_reg_open_file(struct inode *inode, struct file *file)
1075 file->private_data = inode->i_private;
1079 static ssize_t codec_reg_read_file(struct file *file, char __user *user_buf,
1080 size_t count, loff_t *ppos)
1083 struct snd_soc_codec *codec = file->private_data;
1084 struct device *card_dev = codec->card->dev;
1085 struct snd_soc_device *devdata = card_dev->driver_data;
1086 char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
1089 ret = soc_codec_reg_show(devdata, buf);
1091 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
1096 static ssize_t codec_reg_write_file(struct file *file,
1097 const char __user *user_buf, size_t count, loff_t *ppos)
1102 unsigned long reg, value;
1104 struct snd_soc_codec *codec = file->private_data;
1106 buf_size = min(count, (sizeof(buf)-1));
1107 if (copy_from_user(buf, user_buf, buf_size))
1111 if (codec->reg_cache_step)
1112 step = codec->reg_cache_step;
1114 while (*start == ' ')
1116 reg = simple_strtoul(start, &start, 16);
1117 if ((reg >= codec->reg_cache_size) || (reg % step))
1119 while (*start == ' ')
1121 if (strict_strtoul(start, 16, &value))
1123 codec->write(codec, reg, value);
1127 static const struct file_operations codec_reg_fops = {
1128 .open = codec_reg_open_file,
1129 .read = codec_reg_read_file,
1130 .write = codec_reg_write_file,
1133 static void soc_init_codec_debugfs(struct snd_soc_codec *codec)
1135 codec->debugfs_reg = debugfs_create_file("codec_reg", 0644,
1136 debugfs_root, codec,
1138 if (!codec->debugfs_reg)
1140 "ASoC: Failed to create codec register debugfs file\n");
1142 codec->debugfs_pop_time = debugfs_create_u32("dapm_pop_time", 0744,
1145 if (!codec->debugfs_pop_time)
1147 "Failed to create pop time debugfs file\n");
1150 static void soc_cleanup_codec_debugfs(struct snd_soc_codec *codec)
1152 debugfs_remove(codec->debugfs_pop_time);
1153 debugfs_remove(codec->debugfs_reg);
1158 static inline void soc_init_codec_debugfs(struct snd_soc_codec *codec)
1162 static inline void soc_cleanup_codec_debugfs(struct snd_soc_codec *codec)
1168 * snd_soc_new_ac97_codec - initailise AC97 device
1169 * @codec: audio codec
1170 * @ops: AC97 bus operations
1171 * @num: AC97 codec number
1173 * Initialises AC97 codec resources for use by ad-hoc devices only.
1175 int snd_soc_new_ac97_codec(struct snd_soc_codec *codec,
1176 struct snd_ac97_bus_ops *ops, int num)
1178 mutex_lock(&codec->mutex);
1180 codec->ac97 = kzalloc(sizeof(struct snd_ac97), GFP_KERNEL);
1181 if (codec->ac97 == NULL) {
1182 mutex_unlock(&codec->mutex);
1186 codec->ac97->bus = kzalloc(sizeof(struct snd_ac97_bus), GFP_KERNEL);
1187 if (codec->ac97->bus == NULL) {
1190 mutex_unlock(&codec->mutex);
1194 codec->ac97->bus->ops = ops;
1195 codec->ac97->num = num;
1196 mutex_unlock(&codec->mutex);
1199 EXPORT_SYMBOL_GPL(snd_soc_new_ac97_codec);
1202 * snd_soc_free_ac97_codec - free AC97 codec device
1203 * @codec: audio codec
1205 * Frees AC97 codec device resources.
1207 void snd_soc_free_ac97_codec(struct snd_soc_codec *codec)
1209 mutex_lock(&codec->mutex);
1210 kfree(codec->ac97->bus);
1213 mutex_unlock(&codec->mutex);
1215 EXPORT_SYMBOL_GPL(snd_soc_free_ac97_codec);
1218 * snd_soc_update_bits - update codec register bits
1219 * @codec: audio codec
1220 * @reg: codec register
1221 * @mask: register mask
1224 * Writes new register value.
1226 * Returns 1 for change else 0.
1228 int snd_soc_update_bits(struct snd_soc_codec *codec, unsigned short reg,
1229 unsigned short mask, unsigned short value)
1232 unsigned short old, new;
1234 mutex_lock(&io_mutex);
1235 old = snd_soc_read(codec, reg);
1236 new = (old & ~mask) | value;
1237 change = old != new;
1239 snd_soc_write(codec, reg, new);
1241 mutex_unlock(&io_mutex);
1244 EXPORT_SYMBOL_GPL(snd_soc_update_bits);
1247 * snd_soc_test_bits - test register for change
1248 * @codec: audio codec
1249 * @reg: codec register
1250 * @mask: register mask
1253 * Tests a register with a new value and checks if the new value is
1254 * different from the old value.
1256 * Returns 1 for change else 0.
1258 int snd_soc_test_bits(struct snd_soc_codec *codec, unsigned short reg,
1259 unsigned short mask, unsigned short value)
1262 unsigned short old, new;
1264 mutex_lock(&io_mutex);
1265 old = snd_soc_read(codec, reg);
1266 new = (old & ~mask) | value;
1267 change = old != new;
1268 mutex_unlock(&io_mutex);
1272 EXPORT_SYMBOL_GPL(snd_soc_test_bits);
1275 * snd_soc_new_pcms - create new sound card and pcms
1276 * @socdev: the SoC audio device
1278 * Create a new sound card based upon the codec and interface pcms.
1280 * Returns 0 for success, else error.
1282 int snd_soc_new_pcms(struct snd_soc_device *socdev, int idx, const char *xid)
1284 struct snd_soc_codec *codec = socdev->codec;
1285 struct snd_soc_card *card = socdev->card;
1288 mutex_lock(&codec->mutex);
1290 /* register a sound card */
1291 codec->card = snd_card_new(idx, xid, codec->owner, 0);
1293 printk(KERN_ERR "asoc: can't create sound card for codec %s\n",
1295 mutex_unlock(&codec->mutex);
1299 codec->card->dev = socdev->dev;
1300 codec->card->private_data = codec;
1301 strncpy(codec->card->driver, codec->name, sizeof(codec->card->driver));
1303 /* create the pcms */
1304 for (i = 0; i < card->num_links; i++) {
1305 ret = soc_new_pcm(socdev, &card->dai_link[i], i);
1307 printk(KERN_ERR "asoc: can't create pcm %s\n",
1308 card->dai_link[i].stream_name);
1309 mutex_unlock(&codec->mutex);
1314 mutex_unlock(&codec->mutex);
1317 EXPORT_SYMBOL_GPL(snd_soc_new_pcms);
1320 * snd_soc_init_card - register sound card
1321 * @socdev: the SoC audio device
1323 * Register a SoC sound card. Also registers an AC97 device if the
1324 * codec is AC97 for ad hoc devices.
1326 * Returns 0 for success, else error.
1328 int snd_soc_init_card(struct snd_soc_device *socdev)
1330 struct snd_soc_codec *codec = socdev->codec;
1331 struct snd_soc_card *card = socdev->card;
1332 int ret = 0, i, ac97 = 0, err = 0;
1334 for (i = 0; i < card->num_links; i++) {
1335 if (card->dai_link[i].init) {
1336 err = card->dai_link[i].init(codec);
1338 printk(KERN_ERR "asoc: failed to init %s\n",
1339 card->dai_link[i].stream_name);
1343 if (card->dai_link[i].codec_dai->ac97_control)
1346 snprintf(codec->card->shortname, sizeof(codec->card->shortname),
1348 snprintf(codec->card->longname, sizeof(codec->card->longname),
1349 "%s (%s)", card->name, codec->name);
1351 ret = snd_card_register(codec->card);
1353 printk(KERN_ERR "asoc: failed to register soundcard for %s\n",
1358 mutex_lock(&codec->mutex);
1359 #ifdef CONFIG_SND_SOC_AC97_BUS
1361 ret = soc_ac97_dev_register(codec);
1363 printk(KERN_ERR "asoc: AC97 device register failed\n");
1364 snd_card_free(codec->card);
1365 mutex_unlock(&codec->mutex);
1371 err = snd_soc_dapm_sys_add(socdev->dev);
1373 printk(KERN_WARNING "asoc: failed to add dapm sysfs entries\n");
1375 err = device_create_file(socdev->dev, &dev_attr_codec_reg);
1377 printk(KERN_WARNING "asoc: failed to add codec sysfs files\n");
1379 soc_init_codec_debugfs(socdev->codec);
1380 mutex_unlock(&codec->mutex);
1385 EXPORT_SYMBOL_GPL(snd_soc_init_card);
1388 * snd_soc_free_pcms - free sound card and pcms
1389 * @socdev: the SoC audio device
1391 * Frees sound card and pcms associated with the socdev.
1392 * Also unregister the codec if it is an AC97 device.
1394 void snd_soc_free_pcms(struct snd_soc_device *socdev)
1396 struct snd_soc_codec *codec = socdev->codec;
1397 #ifdef CONFIG_SND_SOC_AC97_BUS
1398 struct snd_soc_dai *codec_dai;
1402 mutex_lock(&codec->mutex);
1403 soc_cleanup_codec_debugfs(socdev->codec);
1404 #ifdef CONFIG_SND_SOC_AC97_BUS
1405 for (i = 0; i < codec->num_dai; i++) {
1406 codec_dai = &codec->dai[i];
1407 if (codec_dai->ac97_control && codec->ac97) {
1408 soc_ac97_dev_unregister(codec);
1416 snd_card_free(codec->card);
1417 device_remove_file(socdev->dev, &dev_attr_codec_reg);
1418 mutex_unlock(&codec->mutex);
1420 EXPORT_SYMBOL_GPL(snd_soc_free_pcms);
1423 * snd_soc_set_runtime_hwparams - set the runtime hardware parameters
1424 * @substream: the pcm substream
1425 * @hw: the hardware parameters
1427 * Sets the substream runtime hardware parameters.
1429 int snd_soc_set_runtime_hwparams(struct snd_pcm_substream *substream,
1430 const struct snd_pcm_hardware *hw)
1432 struct snd_pcm_runtime *runtime = substream->runtime;
1433 runtime->hw.info = hw->info;
1434 runtime->hw.formats = hw->formats;
1435 runtime->hw.period_bytes_min = hw->period_bytes_min;
1436 runtime->hw.period_bytes_max = hw->period_bytes_max;
1437 runtime->hw.periods_min = hw->periods_min;
1438 runtime->hw.periods_max = hw->periods_max;
1439 runtime->hw.buffer_bytes_max = hw->buffer_bytes_max;
1440 runtime->hw.fifo_size = hw->fifo_size;
1443 EXPORT_SYMBOL_GPL(snd_soc_set_runtime_hwparams);
1446 * snd_soc_cnew - create new control
1447 * @_template: control template
1448 * @data: control private data
1449 * @lnng_name: control long name
1451 * Create a new mixer control from a template control.
1453 * Returns 0 for success, else error.
1455 struct snd_kcontrol *snd_soc_cnew(const struct snd_kcontrol_new *_template,
1456 void *data, char *long_name)
1458 struct snd_kcontrol_new template;
1460 memcpy(&template, _template, sizeof(template));
1462 template.name = long_name;
1465 return snd_ctl_new1(&template, data);
1467 EXPORT_SYMBOL_GPL(snd_soc_cnew);
1470 * snd_soc_info_enum_double - enumerated double mixer info callback
1471 * @kcontrol: mixer control
1472 * @uinfo: control element information
1474 * Callback to provide information about a double enumerated
1477 * Returns 0 for success.
1479 int snd_soc_info_enum_double(struct snd_kcontrol *kcontrol,
1480 struct snd_ctl_elem_info *uinfo)
1482 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
1484 uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
1485 uinfo->count = e->shift_l == e->shift_r ? 1 : 2;
1486 uinfo->value.enumerated.items = e->max;
1488 if (uinfo->value.enumerated.item > e->max - 1)
1489 uinfo->value.enumerated.item = e->max - 1;
1490 strcpy(uinfo->value.enumerated.name,
1491 e->texts[uinfo->value.enumerated.item]);
1494 EXPORT_SYMBOL_GPL(snd_soc_info_enum_double);
1497 * snd_soc_get_enum_double - enumerated double mixer get callback
1498 * @kcontrol: mixer control
1499 * @uinfo: control element information
1501 * Callback to get the value of a double enumerated mixer.
1503 * Returns 0 for success.
1505 int snd_soc_get_enum_double(struct snd_kcontrol *kcontrol,
1506 struct snd_ctl_elem_value *ucontrol)
1508 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
1509 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
1510 unsigned short val, bitmask;
1512 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
1514 val = snd_soc_read(codec, e->reg);
1515 ucontrol->value.enumerated.item[0]
1516 = (val >> e->shift_l) & (bitmask - 1);
1517 if (e->shift_l != e->shift_r)
1518 ucontrol->value.enumerated.item[1] =
1519 (val >> e->shift_r) & (bitmask - 1);
1523 EXPORT_SYMBOL_GPL(snd_soc_get_enum_double);
1526 * snd_soc_put_enum_double - enumerated double mixer put callback
1527 * @kcontrol: mixer control
1528 * @uinfo: control element information
1530 * Callback to set the value of a double enumerated mixer.
1532 * Returns 0 for success.
1534 int snd_soc_put_enum_double(struct snd_kcontrol *kcontrol,
1535 struct snd_ctl_elem_value *ucontrol)
1537 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
1538 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
1540 unsigned short mask, bitmask;
1542 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
1544 if (ucontrol->value.enumerated.item[0] > e->max - 1)
1546 val = ucontrol->value.enumerated.item[0] << e->shift_l;
1547 mask = (bitmask - 1) << e->shift_l;
1548 if (e->shift_l != e->shift_r) {
1549 if (ucontrol->value.enumerated.item[1] > e->max - 1)
1551 val |= ucontrol->value.enumerated.item[1] << e->shift_r;
1552 mask |= (bitmask - 1) << e->shift_r;
1555 return snd_soc_update_bits(codec, e->reg, mask, val);
1557 EXPORT_SYMBOL_GPL(snd_soc_put_enum_double);
1560 * snd_soc_info_enum_ext - external enumerated single mixer info callback
1561 * @kcontrol: mixer control
1562 * @uinfo: control element information
1564 * Callback to provide information about an external enumerated
1567 * Returns 0 for success.
1569 int snd_soc_info_enum_ext(struct snd_kcontrol *kcontrol,
1570 struct snd_ctl_elem_info *uinfo)
1572 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
1574 uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
1576 uinfo->value.enumerated.items = e->max;
1578 if (uinfo->value.enumerated.item > e->max - 1)
1579 uinfo->value.enumerated.item = e->max - 1;
1580 strcpy(uinfo->value.enumerated.name,
1581 e->texts[uinfo->value.enumerated.item]);
1584 EXPORT_SYMBOL_GPL(snd_soc_info_enum_ext);
1587 * snd_soc_info_volsw_ext - external single mixer info callback
1588 * @kcontrol: mixer control
1589 * @uinfo: control element information
1591 * Callback to provide information about a single external mixer control.
1593 * Returns 0 for success.
1595 int snd_soc_info_volsw_ext(struct snd_kcontrol *kcontrol,
1596 struct snd_ctl_elem_info *uinfo)
1598 int max = kcontrol->private_value;
1601 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
1603 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
1606 uinfo->value.integer.min = 0;
1607 uinfo->value.integer.max = max;
1610 EXPORT_SYMBOL_GPL(snd_soc_info_volsw_ext);
1613 * snd_soc_info_volsw - single mixer info callback
1614 * @kcontrol: mixer control
1615 * @uinfo: control element information
1617 * Callback to provide information about a single mixer control.
1619 * Returns 0 for success.
1621 int snd_soc_info_volsw(struct snd_kcontrol *kcontrol,
1622 struct snd_ctl_elem_info *uinfo)
1624 struct soc_mixer_control *mc =
1625 (struct soc_mixer_control *)kcontrol->private_value;
1627 unsigned int shift = mc->shift;
1628 unsigned int rshift = mc->rshift;
1631 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
1633 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
1635 uinfo->count = shift == rshift ? 1 : 2;
1636 uinfo->value.integer.min = 0;
1637 uinfo->value.integer.max = max;
1640 EXPORT_SYMBOL_GPL(snd_soc_info_volsw);
1643 * snd_soc_get_volsw - single mixer get callback
1644 * @kcontrol: mixer control
1645 * @uinfo: control element information
1647 * Callback to get the value of a single mixer control.
1649 * Returns 0 for success.
1651 int snd_soc_get_volsw(struct snd_kcontrol *kcontrol,
1652 struct snd_ctl_elem_value *ucontrol)
1654 struct soc_mixer_control *mc =
1655 (struct soc_mixer_control *)kcontrol->private_value;
1656 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
1657 unsigned int reg = mc->reg;
1658 unsigned int shift = mc->shift;
1659 unsigned int rshift = mc->rshift;
1661 unsigned int mask = (1 << fls(max)) - 1;
1662 unsigned int invert = mc->invert;
1664 ucontrol->value.integer.value[0] =
1665 (snd_soc_read(codec, reg) >> shift) & mask;
1666 if (shift != rshift)
1667 ucontrol->value.integer.value[1] =
1668 (snd_soc_read(codec, reg) >> rshift) & mask;
1670 ucontrol->value.integer.value[0] =
1671 max - ucontrol->value.integer.value[0];
1672 if (shift != rshift)
1673 ucontrol->value.integer.value[1] =
1674 max - ucontrol->value.integer.value[1];
1679 EXPORT_SYMBOL_GPL(snd_soc_get_volsw);
1682 * snd_soc_put_volsw - single mixer put callback
1683 * @kcontrol: mixer control
1684 * @uinfo: control element information
1686 * Callback to set the value of a single mixer control.
1688 * Returns 0 for success.
1690 int snd_soc_put_volsw(struct snd_kcontrol *kcontrol,
1691 struct snd_ctl_elem_value *ucontrol)
1693 struct soc_mixer_control *mc =
1694 (struct soc_mixer_control *)kcontrol->private_value;
1695 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
1696 unsigned int reg = mc->reg;
1697 unsigned int shift = mc->shift;
1698 unsigned int rshift = mc->rshift;
1700 unsigned int mask = (1 << fls(max)) - 1;
1701 unsigned int invert = mc->invert;
1702 unsigned short val, val2, val_mask;
1704 val = (ucontrol->value.integer.value[0] & mask);
1707 val_mask = mask << shift;
1709 if (shift != rshift) {
1710 val2 = (ucontrol->value.integer.value[1] & mask);
1713 val_mask |= mask << rshift;
1714 val |= val2 << rshift;
1716 return snd_soc_update_bits(codec, reg, val_mask, val);
1718 EXPORT_SYMBOL_GPL(snd_soc_put_volsw);
1721 * snd_soc_info_volsw_2r - double mixer info callback
1722 * @kcontrol: mixer control
1723 * @uinfo: control element information
1725 * Callback to provide information about a double mixer control that
1726 * spans 2 codec registers.
1728 * Returns 0 for success.
1730 int snd_soc_info_volsw_2r(struct snd_kcontrol *kcontrol,
1731 struct snd_ctl_elem_info *uinfo)
1733 struct soc_mixer_control *mc =
1734 (struct soc_mixer_control *)kcontrol->private_value;
1738 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
1740 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
1743 uinfo->value.integer.min = 0;
1744 uinfo->value.integer.max = max;
1747 EXPORT_SYMBOL_GPL(snd_soc_info_volsw_2r);
1750 * snd_soc_get_volsw_2r - double mixer get callback
1751 * @kcontrol: mixer control
1752 * @uinfo: control element information
1754 * Callback to get the value of a double mixer control that spans 2 registers.
1756 * Returns 0 for success.
1758 int snd_soc_get_volsw_2r(struct snd_kcontrol *kcontrol,
1759 struct snd_ctl_elem_value *ucontrol)
1761 struct soc_mixer_control *mc =
1762 (struct soc_mixer_control *)kcontrol->private_value;
1763 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
1764 unsigned int reg = mc->reg;
1765 unsigned int reg2 = mc->rreg;
1766 unsigned int shift = mc->shift;
1768 unsigned int mask = (1<<fls(max))-1;
1769 unsigned int invert = mc->invert;
1771 ucontrol->value.integer.value[0] =
1772 (snd_soc_read(codec, reg) >> shift) & mask;
1773 ucontrol->value.integer.value[1] =
1774 (snd_soc_read(codec, reg2) >> shift) & mask;
1776 ucontrol->value.integer.value[0] =
1777 max - ucontrol->value.integer.value[0];
1778 ucontrol->value.integer.value[1] =
1779 max - ucontrol->value.integer.value[1];
1784 EXPORT_SYMBOL_GPL(snd_soc_get_volsw_2r);
1787 * snd_soc_put_volsw_2r - double mixer set callback
1788 * @kcontrol: mixer control
1789 * @uinfo: control element information
1791 * Callback to set the value of a double mixer control that spans 2 registers.
1793 * Returns 0 for success.
1795 int snd_soc_put_volsw_2r(struct snd_kcontrol *kcontrol,
1796 struct snd_ctl_elem_value *ucontrol)
1798 struct soc_mixer_control *mc =
1799 (struct soc_mixer_control *)kcontrol->private_value;
1800 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
1801 unsigned int reg = mc->reg;
1802 unsigned int reg2 = mc->rreg;
1803 unsigned int shift = mc->shift;
1805 unsigned int mask = (1 << fls(max)) - 1;
1806 unsigned int invert = mc->invert;
1808 unsigned short val, val2, val_mask;
1810 val_mask = mask << shift;
1811 val = (ucontrol->value.integer.value[0] & mask);
1812 val2 = (ucontrol->value.integer.value[1] & mask);
1820 val2 = val2 << shift;
1822 err = snd_soc_update_bits(codec, reg, val_mask, val);
1826 err = snd_soc_update_bits(codec, reg2, val_mask, val2);
1829 EXPORT_SYMBOL_GPL(snd_soc_put_volsw_2r);
1832 * snd_soc_info_volsw_s8 - signed mixer info callback
1833 * @kcontrol: mixer control
1834 * @uinfo: control element information
1836 * Callback to provide information about a signed mixer control.
1838 * Returns 0 for success.
1840 int snd_soc_info_volsw_s8(struct snd_kcontrol *kcontrol,
1841 struct snd_ctl_elem_info *uinfo)
1843 struct soc_mixer_control *mc =
1844 (struct soc_mixer_control *)kcontrol->private_value;
1848 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
1850 uinfo->value.integer.min = 0;
1851 uinfo->value.integer.max = max-min;
1854 EXPORT_SYMBOL_GPL(snd_soc_info_volsw_s8);
1857 * snd_soc_get_volsw_s8 - signed mixer get callback
1858 * @kcontrol: mixer control
1859 * @uinfo: control element information
1861 * Callback to get the value of a signed mixer control.
1863 * Returns 0 for success.
1865 int snd_soc_get_volsw_s8(struct snd_kcontrol *kcontrol,
1866 struct snd_ctl_elem_value *ucontrol)
1868 struct soc_mixer_control *mc =
1869 (struct soc_mixer_control *)kcontrol->private_value;
1870 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
1871 unsigned int reg = mc->reg;
1873 int val = snd_soc_read(codec, reg);
1875 ucontrol->value.integer.value[0] =
1876 ((signed char)(val & 0xff))-min;
1877 ucontrol->value.integer.value[1] =
1878 ((signed char)((val >> 8) & 0xff))-min;
1881 EXPORT_SYMBOL_GPL(snd_soc_get_volsw_s8);
1884 * snd_soc_put_volsw_sgn - signed mixer put callback
1885 * @kcontrol: mixer control
1886 * @uinfo: control element information
1888 * Callback to set the value of a signed mixer control.
1890 * Returns 0 for success.
1892 int snd_soc_put_volsw_s8(struct snd_kcontrol *kcontrol,
1893 struct snd_ctl_elem_value *ucontrol)
1895 struct soc_mixer_control *mc =
1896 (struct soc_mixer_control *)kcontrol->private_value;
1897 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
1898 unsigned int reg = mc->reg;
1902 val = (ucontrol->value.integer.value[0]+min) & 0xff;
1903 val |= ((ucontrol->value.integer.value[1]+min) & 0xff) << 8;
1905 return snd_soc_update_bits(codec, reg, 0xffff, val);
1907 EXPORT_SYMBOL_GPL(snd_soc_put_volsw_s8);
1910 * snd_soc_dai_set_sysclk - configure DAI system or master clock.
1912 * @clk_id: DAI specific clock ID
1913 * @freq: new clock frequency in Hz
1914 * @dir: new clock direction - input/output.
1916 * Configures the DAI master (MCLK) or system (SYSCLK) clocking.
1918 int snd_soc_dai_set_sysclk(struct snd_soc_dai *dai, int clk_id,
1919 unsigned int freq, int dir)
1921 if (dai->ops.set_sysclk)
1922 return dai->ops.set_sysclk(dai, clk_id, freq, dir);
1926 EXPORT_SYMBOL_GPL(snd_soc_dai_set_sysclk);
1929 * snd_soc_dai_set_clkdiv - configure DAI clock dividers.
1931 * @clk_id: DAI specific clock divider ID
1932 * @div: new clock divisor.
1934 * Configures the clock dividers. This is used to derive the best DAI bit and
1935 * frame clocks from the system or master clock. It's best to set the DAI bit
1936 * and frame clocks as low as possible to save system power.
1938 int snd_soc_dai_set_clkdiv(struct snd_soc_dai *dai,
1939 int div_id, int div)
1941 if (dai->ops.set_clkdiv)
1942 return dai->ops.set_clkdiv(dai, div_id, div);
1946 EXPORT_SYMBOL_GPL(snd_soc_dai_set_clkdiv);
1949 * snd_soc_dai_set_pll - configure DAI PLL.
1951 * @pll_id: DAI specific PLL ID
1952 * @freq_in: PLL input clock frequency in Hz
1953 * @freq_out: requested PLL output clock frequency in Hz
1955 * Configures and enables PLL to generate output clock based on input clock.
1957 int snd_soc_dai_set_pll(struct snd_soc_dai *dai,
1958 int pll_id, unsigned int freq_in, unsigned int freq_out)
1960 if (dai->ops.set_pll)
1961 return dai->ops.set_pll(dai, pll_id, freq_in, freq_out);
1965 EXPORT_SYMBOL_GPL(snd_soc_dai_set_pll);
1968 * snd_soc_dai_set_fmt - configure DAI hardware audio format.
1970 * @fmt: SND_SOC_DAIFMT_ format value.
1972 * Configures the DAI hardware format and clocking.
1974 int snd_soc_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
1976 if (dai->ops.set_fmt)
1977 return dai->ops.set_fmt(dai, fmt);
1981 EXPORT_SYMBOL_GPL(snd_soc_dai_set_fmt);
1984 * snd_soc_dai_set_tdm_slot - configure DAI TDM.
1986 * @mask: DAI specific mask representing used slots.
1987 * @slots: Number of slots in use.
1989 * Configures a DAI for TDM operation. Both mask and slots are codec and DAI
1992 int snd_soc_dai_set_tdm_slot(struct snd_soc_dai *dai,
1993 unsigned int mask, int slots)
1995 if (dai->ops.set_sysclk)
1996 return dai->ops.set_tdm_slot(dai, mask, slots);
2000 EXPORT_SYMBOL_GPL(snd_soc_dai_set_tdm_slot);
2003 * snd_soc_dai_set_tristate - configure DAI system or master clock.
2005 * @tristate: tristate enable
2007 * Tristates the DAI so that others can use it.
2009 int snd_soc_dai_set_tristate(struct snd_soc_dai *dai, int tristate)
2011 if (dai->ops.set_sysclk)
2012 return dai->ops.set_tristate(dai, tristate);
2016 EXPORT_SYMBOL_GPL(snd_soc_dai_set_tristate);
2019 * snd_soc_dai_digital_mute - configure DAI system or master clock.
2021 * @mute: mute enable
2023 * Mutes the DAI DAC.
2025 int snd_soc_dai_digital_mute(struct snd_soc_dai *dai, int mute)
2027 if (dai->ops.digital_mute)
2028 return dai->ops.digital_mute(dai, mute);
2032 EXPORT_SYMBOL_GPL(snd_soc_dai_digital_mute);
2035 * snd_soc_register_card - Register a card with the ASoC core
2037 * @param card Card to register
2039 * Note that currently this is an internal only function: it will be
2040 * exposed to machine drivers after further backporting of ASoC v2
2041 * registration APIs.
2043 static int snd_soc_register_card(struct snd_soc_card *card)
2045 if (!card->name || !card->dev)
2048 INIT_LIST_HEAD(&card->list);
2049 card->instantiated = 0;
2051 mutex_lock(&client_mutex);
2052 list_add(&card->list, &card_list);
2053 snd_soc_instantiate_cards();
2054 mutex_unlock(&client_mutex);
2056 dev_dbg(card->dev, "Registered card '%s'\n", card->name);
2062 * snd_soc_unregister_card - Unregister a card with the ASoC core
2064 * @param card Card to unregister
2066 * Note that currently this is an internal only function: it will be
2067 * exposed to machine drivers after further backporting of ASoC v2
2068 * registration APIs.
2070 static int snd_soc_unregister_card(struct snd_soc_card *card)
2072 mutex_lock(&client_mutex);
2073 list_del(&card->list);
2074 mutex_unlock(&client_mutex);
2076 dev_dbg(card->dev, "Unregistered card '%s'\n", card->name);
2082 * snd_soc_register_dai - Register a DAI with the ASoC core
2084 * @param dai DAI to register
2086 int snd_soc_register_dai(struct snd_soc_dai *dai)
2091 /* The device should become mandatory over time */
2093 printk(KERN_WARNING "No device for DAI %s\n", dai->name);
2095 INIT_LIST_HEAD(&dai->list);
2097 mutex_lock(&client_mutex);
2098 list_add(&dai->list, &dai_list);
2099 snd_soc_instantiate_cards();
2100 mutex_unlock(&client_mutex);
2102 pr_debug("Registered DAI '%s'\n", dai->name);
2106 EXPORT_SYMBOL_GPL(snd_soc_register_dai);
2109 * snd_soc_unregister_dai - Unregister a DAI from the ASoC core
2111 * @param dai DAI to unregister
2113 void snd_soc_unregister_dai(struct snd_soc_dai *dai)
2115 mutex_lock(&client_mutex);
2116 list_del(&dai->list);
2117 mutex_unlock(&client_mutex);
2119 pr_debug("Unregistered DAI '%s'\n", dai->name);
2121 EXPORT_SYMBOL_GPL(snd_soc_unregister_dai);
2124 * snd_soc_register_dais - Register multiple DAIs with the ASoC core
2126 * @param dai Array of DAIs to register
2127 * @param count Number of DAIs
2129 int snd_soc_register_dais(struct snd_soc_dai *dai, size_t count)
2133 for (i = 0; i < count; i++) {
2134 ret = snd_soc_register_dai(&dai[i]);
2142 for (i--; i >= 0; i--)
2143 snd_soc_unregister_dai(&dai[i]);
2147 EXPORT_SYMBOL_GPL(snd_soc_register_dais);
2150 * snd_soc_unregister_dais - Unregister multiple DAIs from the ASoC core
2152 * @param dai Array of DAIs to unregister
2153 * @param count Number of DAIs
2155 void snd_soc_unregister_dais(struct snd_soc_dai *dai, size_t count)
2159 for (i = 0; i < count; i++)
2160 snd_soc_unregister_dai(&dai[i]);
2162 EXPORT_SYMBOL_GPL(snd_soc_unregister_dais);
2165 * snd_soc_register_platform - Register a platform with the ASoC core
2167 * @param platform platform to register
2169 int snd_soc_register_platform(struct snd_soc_platform *platform)
2171 if (!platform->name)
2174 INIT_LIST_HEAD(&platform->list);
2176 mutex_lock(&client_mutex);
2177 list_add(&platform->list, &platform_list);
2178 snd_soc_instantiate_cards();
2179 mutex_unlock(&client_mutex);
2181 pr_debug("Registered platform '%s'\n", platform->name);
2185 EXPORT_SYMBOL_GPL(snd_soc_register_platform);
2188 * snd_soc_unregister_platform - Unregister a platform from the ASoC core
2190 * @param platform platform to unregister
2192 void snd_soc_unregister_platform(struct snd_soc_platform *platform)
2194 mutex_lock(&client_mutex);
2195 list_del(&platform->list);
2196 mutex_unlock(&client_mutex);
2198 pr_debug("Unregistered platform '%s'\n", platform->name);
2200 EXPORT_SYMBOL_GPL(snd_soc_unregister_platform);
2202 static int __devinit snd_soc_init(void)
2204 #ifdef CONFIG_DEBUG_FS
2205 debugfs_root = debugfs_create_dir("asoc", NULL);
2206 if (IS_ERR(debugfs_root) || !debugfs_root) {
2208 "ASoC: Failed to create debugfs directory\n");
2209 debugfs_root = NULL;
2213 return platform_driver_register(&soc_driver);
2216 static void __exit snd_soc_exit(void)
2218 #ifdef CONFIG_DEBUG_FS
2219 debugfs_remove_recursive(debugfs_root);
2221 platform_driver_unregister(&soc_driver);
2224 module_init(snd_soc_init);
2225 module_exit(snd_soc_exit);
2227 /* Module information */
2228 MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
2229 MODULE_DESCRIPTION("ALSA SoC Core");
2230 MODULE_LICENSE("GPL");
2231 MODULE_ALIAS("platform:soc-audio");