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 DECLARE_WAIT_QUEUE_HEAD(soc_pm_waitq);
42 #ifdef CONFIG_DEBUG_FS
43 static struct dentry *debugfs_root;
46 static DEFINE_MUTEX(client_mutex);
47 static LIST_HEAD(card_list);
48 static LIST_HEAD(dai_list);
49 static LIST_HEAD(platform_list);
50 static LIST_HEAD(codec_list);
52 static int snd_soc_register_card(struct snd_soc_card *card);
53 static int snd_soc_unregister_card(struct snd_soc_card *card);
56 * This is a timeout to do a DAPM powerdown after a stream is closed().
57 * It can be used to eliminate pops between different playback streams, e.g.
58 * between two audio tracks.
60 static int pmdown_time = 5000;
61 module_param(pmdown_time, int, 0);
62 MODULE_PARM_DESC(pmdown_time, "DAPM stream powerdown time (msecs)");
65 * This function forces any delayed work to be queued and run.
67 static int run_delayed_work(struct delayed_work *dwork)
71 /* cancel any work waiting to be queued. */
72 ret = cancel_delayed_work(dwork);
74 /* if there was any work waiting then we run it now and
75 * wait for it's completion */
77 schedule_delayed_work(dwork, 0);
78 flush_scheduled_work();
83 /* codec register dump */
84 static ssize_t soc_codec_reg_show(struct snd_soc_codec *codec, char *buf)
86 int i, step = 1, count = 0;
88 if (!codec->reg_cache_size)
91 if (codec->reg_cache_step)
92 step = codec->reg_cache_step;
94 count += sprintf(buf, "%s registers\n", codec->name);
95 for (i = 0; i < codec->reg_cache_size; i += step) {
96 if (codec->readable_register && !codec->readable_register(i))
99 count += sprintf(buf + count, "%2x: ", i);
100 if (count >= PAGE_SIZE - 1)
103 if (codec->display_register)
104 count += codec->display_register(codec, buf + count,
105 PAGE_SIZE - count, i);
107 count += snprintf(buf + count, PAGE_SIZE - count,
108 "%4x", codec->read(codec, i));
110 if (count >= PAGE_SIZE - 1)
113 count += snprintf(buf + count, PAGE_SIZE - count, "\n");
114 if (count >= PAGE_SIZE - 1)
118 /* Truncate count; min() would cause a warning */
119 if (count >= PAGE_SIZE)
120 count = PAGE_SIZE - 1;
124 static ssize_t codec_reg_show(struct device *dev,
125 struct device_attribute *attr, char *buf)
127 struct snd_soc_device *devdata = dev_get_drvdata(dev);
128 return soc_codec_reg_show(devdata->card->codec, buf);
131 static DEVICE_ATTR(codec_reg, 0444, codec_reg_show, NULL);
133 static ssize_t pmdown_time_show(struct device *dev,
134 struct device_attribute *attr, char *buf)
136 struct snd_soc_device *socdev = dev_get_drvdata(dev);
137 struct snd_soc_card *card = socdev->card;
139 return sprintf(buf, "%d\n", card->pmdown_time);
142 static ssize_t pmdown_time_set(struct device *dev,
143 struct device_attribute *attr,
144 const char *buf, size_t count)
146 struct snd_soc_device *socdev = dev_get_drvdata(dev);
147 struct snd_soc_card *card = socdev->card;
149 strict_strtol(buf, 10, &card->pmdown_time);
154 static DEVICE_ATTR(pmdown_time, 0644, pmdown_time_show, pmdown_time_set);
156 #ifdef CONFIG_DEBUG_FS
157 static int codec_reg_open_file(struct inode *inode, struct file *file)
159 file->private_data = inode->i_private;
163 static ssize_t codec_reg_read_file(struct file *file, char __user *user_buf,
164 size_t count, loff_t *ppos)
167 struct snd_soc_codec *codec = file->private_data;
168 char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
171 ret = soc_codec_reg_show(codec, buf);
173 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
178 static ssize_t codec_reg_write_file(struct file *file,
179 const char __user *user_buf, size_t count, loff_t *ppos)
184 unsigned long reg, value;
186 struct snd_soc_codec *codec = file->private_data;
188 buf_size = min(count, (sizeof(buf)-1));
189 if (copy_from_user(buf, user_buf, buf_size))
193 if (codec->reg_cache_step)
194 step = codec->reg_cache_step;
196 while (*start == ' ')
198 reg = simple_strtoul(start, &start, 16);
199 if ((reg >= codec->reg_cache_size) || (reg % step))
201 while (*start == ' ')
203 if (strict_strtoul(start, 16, &value))
205 codec->write(codec, reg, value);
209 static const struct file_operations codec_reg_fops = {
210 .open = codec_reg_open_file,
211 .read = codec_reg_read_file,
212 .write = codec_reg_write_file,
215 static void soc_init_codec_debugfs(struct snd_soc_codec *codec)
217 char codec_root[128];
220 snprintf(codec_root, sizeof(codec_root),
221 "%s.%s", codec->name, dev_name(codec->dev));
223 snprintf(codec_root, sizeof(codec_root),
226 codec->debugfs_codec_root = debugfs_create_dir(codec_root,
228 if (!codec->debugfs_codec_root) {
230 "ASoC: Failed to create codec debugfs directory\n");
234 codec->debugfs_reg = debugfs_create_file("codec_reg", 0644,
235 codec->debugfs_codec_root,
236 codec, &codec_reg_fops);
237 if (!codec->debugfs_reg)
239 "ASoC: Failed to create codec register debugfs file\n");
241 codec->debugfs_pop_time = debugfs_create_u32("dapm_pop_time", 0744,
242 codec->debugfs_codec_root,
244 if (!codec->debugfs_pop_time)
246 "Failed to create pop time debugfs file\n");
248 codec->debugfs_dapm = debugfs_create_dir("dapm",
249 codec->debugfs_codec_root);
250 if (!codec->debugfs_dapm)
252 "Failed to create DAPM debugfs directory\n");
254 snd_soc_dapm_debugfs_init(codec);
257 static void soc_cleanup_codec_debugfs(struct snd_soc_codec *codec)
259 debugfs_remove_recursive(codec->debugfs_codec_root);
264 static inline void soc_init_codec_debugfs(struct snd_soc_codec *codec)
268 static inline void soc_cleanup_codec_debugfs(struct snd_soc_codec *codec)
273 #ifdef CONFIG_SND_SOC_AC97_BUS
274 /* unregister ac97 codec */
275 static int soc_ac97_dev_unregister(struct snd_soc_codec *codec)
277 if (codec->ac97->dev.bus)
278 device_unregister(&codec->ac97->dev);
282 /* stop no dev release warning */
283 static void soc_ac97_device_release(struct device *dev){}
285 /* register ac97 codec to bus */
286 static int soc_ac97_dev_register(struct snd_soc_codec *codec)
290 codec->ac97->dev.bus = &ac97_bus_type;
291 codec->ac97->dev.parent = codec->card->dev;
292 codec->ac97->dev.release = soc_ac97_device_release;
294 dev_set_name(&codec->ac97->dev, "%d-%d:%s",
295 codec->card->number, 0, codec->name);
296 err = device_register(&codec->ac97->dev);
298 snd_printk(KERN_ERR "Can't register ac97 bus\n");
299 codec->ac97->dev.bus = NULL;
306 static int soc_pcm_apply_symmetry(struct snd_pcm_substream *substream)
308 struct snd_soc_pcm_runtime *rtd = substream->private_data;
309 struct snd_soc_device *socdev = rtd->socdev;
310 struct snd_soc_card *card = socdev->card;
311 struct snd_soc_dai_link *machine = rtd->dai;
312 struct snd_soc_dai *cpu_dai = machine->cpu_dai;
313 struct snd_soc_dai *codec_dai = machine->codec_dai;
316 if (codec_dai->symmetric_rates || cpu_dai->symmetric_rates ||
317 machine->symmetric_rates) {
318 dev_dbg(card->dev, "Symmetry forces %dHz rate\n",
321 ret = snd_pcm_hw_constraint_minmax(substream->runtime,
322 SNDRV_PCM_HW_PARAM_RATE,
327 "Unable to apply rate symmetry constraint: %d\n", ret);
336 * Called by ALSA when a PCM substream is opened, the runtime->hw record is
337 * then initialized and any private data can be allocated. This also calls
338 * startup for the cpu DAI, platform, machine and codec DAI.
340 static int soc_pcm_open(struct snd_pcm_substream *substream)
342 struct snd_soc_pcm_runtime *rtd = substream->private_data;
343 struct snd_soc_device *socdev = rtd->socdev;
344 struct snd_soc_card *card = socdev->card;
345 struct snd_pcm_runtime *runtime = substream->runtime;
346 struct snd_soc_dai_link *machine = rtd->dai;
347 struct snd_soc_platform *platform = card->platform;
348 struct snd_soc_dai *cpu_dai = machine->cpu_dai;
349 struct snd_soc_dai *codec_dai = machine->codec_dai;
352 mutex_lock(&pcm_mutex);
354 /* startup the audio subsystem */
355 if (cpu_dai->ops->startup) {
356 ret = cpu_dai->ops->startup(substream, cpu_dai);
358 printk(KERN_ERR "asoc: can't open interface %s\n",
364 if (platform->pcm_ops->open) {
365 ret = platform->pcm_ops->open(substream);
367 printk(KERN_ERR "asoc: can't open platform %s\n", platform->name);
372 if (codec_dai->ops->startup) {
373 ret = codec_dai->ops->startup(substream, codec_dai);
375 printk(KERN_ERR "asoc: can't open codec %s\n",
381 if (machine->ops && machine->ops->startup) {
382 ret = machine->ops->startup(substream);
384 printk(KERN_ERR "asoc: %s startup failed\n", machine->name);
389 /* Check that the codec and cpu DAI's are compatible */
390 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
391 runtime->hw.rate_min =
392 max(codec_dai->playback.rate_min,
393 cpu_dai->playback.rate_min);
394 runtime->hw.rate_max =
395 min(codec_dai->playback.rate_max,
396 cpu_dai->playback.rate_max);
397 runtime->hw.channels_min =
398 max(codec_dai->playback.channels_min,
399 cpu_dai->playback.channels_min);
400 runtime->hw.channels_max =
401 min(codec_dai->playback.channels_max,
402 cpu_dai->playback.channels_max);
403 runtime->hw.formats =
404 codec_dai->playback.formats & cpu_dai->playback.formats;
406 codec_dai->playback.rates & cpu_dai->playback.rates;
408 runtime->hw.rate_min =
409 max(codec_dai->capture.rate_min,
410 cpu_dai->capture.rate_min);
411 runtime->hw.rate_max =
412 min(codec_dai->capture.rate_max,
413 cpu_dai->capture.rate_max);
414 runtime->hw.channels_min =
415 max(codec_dai->capture.channels_min,
416 cpu_dai->capture.channels_min);
417 runtime->hw.channels_max =
418 min(codec_dai->capture.channels_max,
419 cpu_dai->capture.channels_max);
420 runtime->hw.formats =
421 codec_dai->capture.formats & cpu_dai->capture.formats;
423 codec_dai->capture.rates & cpu_dai->capture.rates;
426 snd_pcm_limit_hw_rates(runtime);
427 if (!runtime->hw.rates) {
428 printk(KERN_ERR "asoc: %s <-> %s No matching rates\n",
429 codec_dai->name, cpu_dai->name);
432 if (!runtime->hw.formats) {
433 printk(KERN_ERR "asoc: %s <-> %s No matching formats\n",
434 codec_dai->name, cpu_dai->name);
437 if (!runtime->hw.channels_min || !runtime->hw.channels_max) {
438 printk(KERN_ERR "asoc: %s <-> %s No matching channels\n",
439 codec_dai->name, cpu_dai->name);
443 /* Symmetry only applies if we've already got an active stream. */
444 if (cpu_dai->active || codec_dai->active) {
445 ret = soc_pcm_apply_symmetry(substream);
450 pr_debug("asoc: %s <-> %s info:\n", codec_dai->name, cpu_dai->name);
451 pr_debug("asoc: rate mask 0x%x\n", runtime->hw.rates);
452 pr_debug("asoc: min ch %d max ch %d\n", runtime->hw.channels_min,
453 runtime->hw.channels_max);
454 pr_debug("asoc: min rate %d max rate %d\n", runtime->hw.rate_min,
455 runtime->hw.rate_max);
457 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
458 cpu_dai->playback.active = codec_dai->playback.active = 1;
460 cpu_dai->capture.active = codec_dai->capture.active = 1;
461 cpu_dai->active = codec_dai->active = 1;
462 cpu_dai->runtime = runtime;
463 card->codec->active++;
464 mutex_unlock(&pcm_mutex);
468 if (machine->ops && machine->ops->shutdown)
469 machine->ops->shutdown(substream);
472 if (platform->pcm_ops->close)
473 platform->pcm_ops->close(substream);
476 if (cpu_dai->ops->shutdown)
477 cpu_dai->ops->shutdown(substream, cpu_dai);
479 mutex_unlock(&pcm_mutex);
484 * Power down the audio subsystem pmdown_time msecs after close is called.
485 * This is to ensure there are no pops or clicks in between any music tracks
486 * due to DAPM power cycling.
488 static void close_delayed_work(struct work_struct *work)
490 struct snd_soc_card *card = container_of(work, struct snd_soc_card,
492 struct snd_soc_codec *codec = card->codec;
493 struct snd_soc_dai *codec_dai;
496 mutex_lock(&pcm_mutex);
497 for (i = 0; i < codec->num_dai; i++) {
498 codec_dai = &codec->dai[i];
500 pr_debug("pop wq checking: %s status: %s waiting: %s\n",
501 codec_dai->playback.stream_name,
502 codec_dai->playback.active ? "active" : "inactive",
503 codec_dai->pop_wait ? "yes" : "no");
505 /* are we waiting on this codec DAI stream */
506 if (codec_dai->pop_wait == 1) {
507 codec_dai->pop_wait = 0;
508 snd_soc_dapm_stream_event(codec,
509 codec_dai->playback.stream_name,
510 SND_SOC_DAPM_STREAM_STOP);
513 mutex_unlock(&pcm_mutex);
517 * Called by ALSA when a PCM substream is closed. Private data can be
518 * freed here. The cpu DAI, codec DAI, machine and platform are also
521 static int soc_codec_close(struct snd_pcm_substream *substream)
523 struct snd_soc_pcm_runtime *rtd = substream->private_data;
524 struct snd_soc_device *socdev = rtd->socdev;
525 struct snd_soc_card *card = socdev->card;
526 struct snd_soc_dai_link *machine = rtd->dai;
527 struct snd_soc_platform *platform = card->platform;
528 struct snd_soc_dai *cpu_dai = machine->cpu_dai;
529 struct snd_soc_dai *codec_dai = machine->codec_dai;
530 struct snd_soc_codec *codec = card->codec;
532 mutex_lock(&pcm_mutex);
534 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
535 cpu_dai->playback.active = codec_dai->playback.active = 0;
537 cpu_dai->capture.active = codec_dai->capture.active = 0;
539 if (codec_dai->playback.active == 0 &&
540 codec_dai->capture.active == 0) {
541 cpu_dai->active = codec_dai->active = 0;
545 /* Muting the DAC suppresses artifacts caused during digital
546 * shutdown, for example from stopping clocks.
548 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
549 snd_soc_dai_digital_mute(codec_dai, 1);
551 if (cpu_dai->ops->shutdown)
552 cpu_dai->ops->shutdown(substream, cpu_dai);
554 if (codec_dai->ops->shutdown)
555 codec_dai->ops->shutdown(substream, codec_dai);
557 if (machine->ops && machine->ops->shutdown)
558 machine->ops->shutdown(substream);
560 if (platform->pcm_ops->close)
561 platform->pcm_ops->close(substream);
562 cpu_dai->runtime = NULL;
564 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
565 /* start delayed pop wq here for playback streams */
566 codec_dai->pop_wait = 1;
567 schedule_delayed_work(&card->delayed_work,
568 msecs_to_jiffies(card->pmdown_time));
570 /* capture streams can be powered down now */
571 snd_soc_dapm_stream_event(codec,
572 codec_dai->capture.stream_name,
573 SND_SOC_DAPM_STREAM_STOP);
576 mutex_unlock(&pcm_mutex);
581 * Called by ALSA when the PCM substream is prepared, can set format, sample
582 * rate, etc. This function is non atomic and can be called multiple times,
583 * it can refer to the runtime info.
585 static int soc_pcm_prepare(struct snd_pcm_substream *substream)
587 struct snd_soc_pcm_runtime *rtd = substream->private_data;
588 struct snd_soc_device *socdev = rtd->socdev;
589 struct snd_soc_card *card = socdev->card;
590 struct snd_soc_dai_link *machine = rtd->dai;
591 struct snd_soc_platform *platform = card->platform;
592 struct snd_soc_dai *cpu_dai = machine->cpu_dai;
593 struct snd_soc_dai *codec_dai = machine->codec_dai;
594 struct snd_soc_codec *codec = card->codec;
597 mutex_lock(&pcm_mutex);
599 if (machine->ops && machine->ops->prepare) {
600 ret = machine->ops->prepare(substream);
602 printk(KERN_ERR "asoc: machine prepare error\n");
607 if (platform->pcm_ops->prepare) {
608 ret = platform->pcm_ops->prepare(substream);
610 printk(KERN_ERR "asoc: platform prepare error\n");
615 if (codec_dai->ops->prepare) {
616 ret = codec_dai->ops->prepare(substream, codec_dai);
618 printk(KERN_ERR "asoc: codec DAI prepare error\n");
623 if (cpu_dai->ops->prepare) {
624 ret = cpu_dai->ops->prepare(substream, cpu_dai);
626 printk(KERN_ERR "asoc: cpu DAI prepare error\n");
631 /* cancel any delayed stream shutdown that is pending */
632 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
633 codec_dai->pop_wait) {
634 codec_dai->pop_wait = 0;
635 cancel_delayed_work(&card->delayed_work);
638 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
639 snd_soc_dapm_stream_event(codec,
640 codec_dai->playback.stream_name,
641 SND_SOC_DAPM_STREAM_START);
643 snd_soc_dapm_stream_event(codec,
644 codec_dai->capture.stream_name,
645 SND_SOC_DAPM_STREAM_START);
647 snd_soc_dai_digital_mute(codec_dai, 0);
650 mutex_unlock(&pcm_mutex);
655 * Called by ALSA when the hardware params are set by application. This
656 * function can also be called multiple times and can allocate buffers
657 * (using snd_pcm_lib_* ). It's non-atomic.
659 static int soc_pcm_hw_params(struct snd_pcm_substream *substream,
660 struct snd_pcm_hw_params *params)
662 struct snd_soc_pcm_runtime *rtd = substream->private_data;
663 struct snd_soc_device *socdev = rtd->socdev;
664 struct snd_soc_dai_link *machine = rtd->dai;
665 struct snd_soc_card *card = socdev->card;
666 struct snd_soc_platform *platform = card->platform;
667 struct snd_soc_dai *cpu_dai = machine->cpu_dai;
668 struct snd_soc_dai *codec_dai = machine->codec_dai;
671 mutex_lock(&pcm_mutex);
673 if (machine->ops && machine->ops->hw_params) {
674 ret = machine->ops->hw_params(substream, params);
676 printk(KERN_ERR "asoc: machine hw_params failed\n");
681 if (codec_dai->ops->hw_params) {
682 ret = codec_dai->ops->hw_params(substream, params, codec_dai);
684 printk(KERN_ERR "asoc: can't set codec %s hw params\n",
690 if (cpu_dai->ops->hw_params) {
691 ret = cpu_dai->ops->hw_params(substream, params, cpu_dai);
693 printk(KERN_ERR "asoc: interface %s hw params failed\n",
699 if (platform->pcm_ops->hw_params) {
700 ret = platform->pcm_ops->hw_params(substream, params);
702 printk(KERN_ERR "asoc: platform %s hw params failed\n",
708 machine->rate = params_rate(params);
711 mutex_unlock(&pcm_mutex);
715 if (cpu_dai->ops->hw_free)
716 cpu_dai->ops->hw_free(substream, cpu_dai);
719 if (codec_dai->ops->hw_free)
720 codec_dai->ops->hw_free(substream, codec_dai);
723 if (machine->ops && machine->ops->hw_free)
724 machine->ops->hw_free(substream);
726 mutex_unlock(&pcm_mutex);
731 * Free's resources allocated by hw_params, can be called multiple times
733 static int soc_pcm_hw_free(struct snd_pcm_substream *substream)
735 struct snd_soc_pcm_runtime *rtd = substream->private_data;
736 struct snd_soc_device *socdev = rtd->socdev;
737 struct snd_soc_dai_link *machine = rtd->dai;
738 struct snd_soc_card *card = socdev->card;
739 struct snd_soc_platform *platform = card->platform;
740 struct snd_soc_dai *cpu_dai = machine->cpu_dai;
741 struct snd_soc_dai *codec_dai = machine->codec_dai;
742 struct snd_soc_codec *codec = card->codec;
744 mutex_lock(&pcm_mutex);
746 /* apply codec digital mute */
748 snd_soc_dai_digital_mute(codec_dai, 1);
750 /* free any machine hw params */
751 if (machine->ops && machine->ops->hw_free)
752 machine->ops->hw_free(substream);
754 /* free any DMA resources */
755 if (platform->pcm_ops->hw_free)
756 platform->pcm_ops->hw_free(substream);
758 /* now free hw params for the DAI's */
759 if (codec_dai->ops->hw_free)
760 codec_dai->ops->hw_free(substream, codec_dai);
762 if (cpu_dai->ops->hw_free)
763 cpu_dai->ops->hw_free(substream, cpu_dai);
765 mutex_unlock(&pcm_mutex);
769 static int soc_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
771 struct snd_soc_pcm_runtime *rtd = substream->private_data;
772 struct snd_soc_device *socdev = rtd->socdev;
773 struct snd_soc_card *card= socdev->card;
774 struct snd_soc_dai_link *machine = rtd->dai;
775 struct snd_soc_platform *platform = card->platform;
776 struct snd_soc_dai *cpu_dai = machine->cpu_dai;
777 struct snd_soc_dai *codec_dai = machine->codec_dai;
780 if (codec_dai->ops->trigger) {
781 ret = codec_dai->ops->trigger(substream, cmd, codec_dai);
786 if (platform->pcm_ops->trigger) {
787 ret = platform->pcm_ops->trigger(substream, cmd);
792 if (cpu_dai->ops->trigger) {
793 ret = cpu_dai->ops->trigger(substream, cmd, cpu_dai);
800 /* ASoC PCM operations */
801 static struct snd_pcm_ops soc_pcm_ops = {
802 .open = soc_pcm_open,
803 .close = soc_codec_close,
804 .hw_params = soc_pcm_hw_params,
805 .hw_free = soc_pcm_hw_free,
806 .prepare = soc_pcm_prepare,
807 .trigger = soc_pcm_trigger,
811 /* powers down audio subsystem for suspend */
812 static int soc_suspend(struct device *dev)
814 struct platform_device *pdev = to_platform_device(dev);
815 struct snd_soc_device *socdev = platform_get_drvdata(pdev);
816 struct snd_soc_card *card = socdev->card;
817 struct snd_soc_platform *platform = card->platform;
818 struct snd_soc_codec_device *codec_dev = socdev->codec_dev;
819 struct snd_soc_codec *codec = card->codec;
822 /* If the initialization of this soc device failed, there is no codec
823 * associated with it. Just bail out in this case.
828 /* Due to the resume being scheduled into a workqueue we could
829 * suspend before that's finished - wait for it to complete.
831 snd_power_lock(codec->card);
832 snd_power_wait(codec->card, SNDRV_CTL_POWER_D0);
833 snd_power_unlock(codec->card);
835 /* we're going to block userspace touching us until resume completes */
836 snd_power_change_state(codec->card, SNDRV_CTL_POWER_D3hot);
838 /* mute any active DAC's */
839 for (i = 0; i < card->num_links; i++) {
840 struct snd_soc_dai *dai = card->dai_link[i].codec_dai;
841 if (dai->ops->digital_mute && dai->playback.active)
842 dai->ops->digital_mute(dai, 1);
845 /* suspend all pcms */
846 for (i = 0; i < card->num_links; i++)
847 snd_pcm_suspend_all(card->dai_link[i].pcm);
849 if (card->suspend_pre)
850 card->suspend_pre(pdev, PMSG_SUSPEND);
852 for (i = 0; i < card->num_links; i++) {
853 struct snd_soc_dai *cpu_dai = card->dai_link[i].cpu_dai;
854 if (cpu_dai->suspend && !cpu_dai->ac97_control)
855 cpu_dai->suspend(cpu_dai);
856 if (platform->suspend)
857 platform->suspend(cpu_dai);
860 /* close any waiting streams and save state */
861 run_delayed_work(&card->delayed_work);
862 codec->suspend_bias_level = codec->bias_level;
864 for (i = 0; i < codec->num_dai; i++) {
865 char *stream = codec->dai[i].playback.stream_name;
867 snd_soc_dapm_stream_event(codec, stream,
868 SND_SOC_DAPM_STREAM_SUSPEND);
869 stream = codec->dai[i].capture.stream_name;
871 snd_soc_dapm_stream_event(codec, stream,
872 SND_SOC_DAPM_STREAM_SUSPEND);
875 if (codec_dev->suspend)
876 codec_dev->suspend(pdev, PMSG_SUSPEND);
878 for (i = 0; i < card->num_links; i++) {
879 struct snd_soc_dai *cpu_dai = card->dai_link[i].cpu_dai;
880 if (cpu_dai->suspend && cpu_dai->ac97_control)
881 cpu_dai->suspend(cpu_dai);
884 if (card->suspend_post)
885 card->suspend_post(pdev, PMSG_SUSPEND);
890 /* deferred resume work, so resume can complete before we finished
891 * setting our codec back up, which can be very slow on I2C
893 static void soc_resume_deferred(struct work_struct *work)
895 struct snd_soc_card *card = container_of(work,
897 deferred_resume_work);
898 struct snd_soc_device *socdev = card->socdev;
899 struct snd_soc_platform *platform = card->platform;
900 struct snd_soc_codec_device *codec_dev = socdev->codec_dev;
901 struct snd_soc_codec *codec = card->codec;
902 struct platform_device *pdev = to_platform_device(socdev->dev);
905 /* our power state is still SNDRV_CTL_POWER_D3hot from suspend time,
906 * so userspace apps are blocked from touching us
909 dev_dbg(socdev->dev, "starting resume work\n");
911 if (card->resume_pre)
912 card->resume_pre(pdev);
914 for (i = 0; i < card->num_links; i++) {
915 struct snd_soc_dai *cpu_dai = card->dai_link[i].cpu_dai;
916 if (cpu_dai->resume && cpu_dai->ac97_control)
917 cpu_dai->resume(cpu_dai);
920 if (codec_dev->resume)
921 codec_dev->resume(pdev);
923 for (i = 0; i < codec->num_dai; i++) {
924 char *stream = codec->dai[i].playback.stream_name;
926 snd_soc_dapm_stream_event(codec, stream,
927 SND_SOC_DAPM_STREAM_RESUME);
928 stream = codec->dai[i].capture.stream_name;
930 snd_soc_dapm_stream_event(codec, stream,
931 SND_SOC_DAPM_STREAM_RESUME);
934 /* unmute any active DACs */
935 for (i = 0; i < card->num_links; i++) {
936 struct snd_soc_dai *dai = card->dai_link[i].codec_dai;
937 if (dai->ops->digital_mute && dai->playback.active)
938 dai->ops->digital_mute(dai, 0);
941 for (i = 0; i < card->num_links; i++) {
942 struct snd_soc_dai *cpu_dai = card->dai_link[i].cpu_dai;
943 if (cpu_dai->resume && !cpu_dai->ac97_control)
944 cpu_dai->resume(cpu_dai);
945 if (platform->resume)
946 platform->resume(cpu_dai);
949 if (card->resume_post)
950 card->resume_post(pdev);
952 dev_dbg(socdev->dev, "resume work completed\n");
954 /* userspace can access us now we are back as we were before */
955 snd_power_change_state(codec->card, SNDRV_CTL_POWER_D0);
958 /* powers up audio subsystem after a suspend */
959 static int soc_resume(struct device *dev)
961 struct platform_device *pdev = to_platform_device(dev);
962 struct snd_soc_device *socdev = platform_get_drvdata(pdev);
963 struct snd_soc_card *card = socdev->card;
964 struct snd_soc_dai *cpu_dai = card->dai_link[0].cpu_dai;
966 /* AC97 devices might have other drivers hanging off them so
967 * need to resume immediately. Other drivers don't have that
968 * problem and may take a substantial amount of time to resume
969 * due to I/O costs and anti-pop so handle them out of line.
971 if (cpu_dai->ac97_control) {
972 dev_dbg(socdev->dev, "Resuming AC97 immediately\n");
973 soc_resume_deferred(&card->deferred_resume_work);
975 dev_dbg(socdev->dev, "Scheduling resume work\n");
976 if (!schedule_work(&card->deferred_resume_work))
977 dev_err(socdev->dev, "resume work item may be lost\n");
983 #define soc_suspend NULL
984 #define soc_resume NULL
987 static struct snd_soc_dai_ops null_dai_ops = {
990 static void snd_soc_instantiate_card(struct snd_soc_card *card)
992 struct platform_device *pdev = container_of(card->dev,
993 struct platform_device,
995 struct snd_soc_codec_device *codec_dev = card->socdev->codec_dev;
996 struct snd_soc_codec *codec;
997 struct snd_soc_platform *platform;
998 struct snd_soc_dai *dai;
999 int i, found, ret, ac97;
1001 if (card->instantiated)
1005 list_for_each_entry(platform, &platform_list, list)
1006 if (card->platform == platform) {
1011 dev_dbg(card->dev, "Platform %s not registered\n",
1012 card->platform->name);
1017 for (i = 0; i < card->num_links; i++) {
1019 list_for_each_entry(dai, &dai_list, list)
1020 if (card->dai_link[i].cpu_dai == dai) {
1025 dev_dbg(card->dev, "DAI %s not registered\n",
1026 card->dai_link[i].cpu_dai->name);
1030 if (card->dai_link[i].cpu_dai->ac97_control)
1034 for (i = 0; i < card->num_links; i++) {
1035 if (!card->dai_link[i].codec_dai->ops)
1036 card->dai_link[i].codec_dai->ops = &null_dai_ops;
1039 /* If we have AC97 in the system then don't wait for the
1040 * codec. This will need revisiting if we have to handle
1041 * systems with mixed AC97 and non-AC97 parts. Only check for
1042 * DAIs currently; we can't do this per link since some AC97
1043 * codecs have non-AC97 DAIs.
1046 for (i = 0; i < card->num_links; i++) {
1048 list_for_each_entry(dai, &dai_list, list)
1049 if (card->dai_link[i].codec_dai == dai) {
1054 dev_dbg(card->dev, "DAI %s not registered\n",
1055 card->dai_link[i].codec_dai->name);
1060 /* Note that we do not current check for codec components */
1062 dev_dbg(card->dev, "All components present, instantiating\n");
1064 /* Found everything, bring it up */
1065 card->pmdown_time = pmdown_time;
1068 ret = card->probe(pdev);
1073 for (i = 0; i < card->num_links; i++) {
1074 struct snd_soc_dai *cpu_dai = card->dai_link[i].cpu_dai;
1075 if (cpu_dai->probe) {
1076 ret = cpu_dai->probe(pdev, cpu_dai);
1082 if (codec_dev->probe) {
1083 ret = codec_dev->probe(pdev);
1087 codec = card->codec;
1089 if (platform->probe) {
1090 ret = platform->probe(pdev);
1095 /* DAPM stream work */
1096 INIT_DELAYED_WORK(&card->delayed_work, close_delayed_work);
1098 /* deferred resume work */
1099 INIT_WORK(&card->deferred_resume_work, soc_resume_deferred);
1102 for (i = 0; i < card->num_links; i++) {
1103 if (card->dai_link[i].init) {
1104 ret = card->dai_link[i].init(codec);
1106 printk(KERN_ERR "asoc: failed to init %s\n",
1107 card->dai_link[i].stream_name);
1111 if (card->dai_link[i].codec_dai->ac97_control)
1115 snprintf(codec->card->shortname, sizeof(codec->card->shortname),
1117 snprintf(codec->card->longname, sizeof(codec->card->longname),
1118 "%s (%s)", card->name, codec->name);
1120 /* Make sure all DAPM widgets are instantiated */
1121 snd_soc_dapm_new_widgets(codec);
1123 ret = snd_card_register(codec->card);
1125 printk(KERN_ERR "asoc: failed to register soundcard for %s\n",
1130 mutex_lock(&codec->mutex);
1131 #ifdef CONFIG_SND_SOC_AC97_BUS
1132 /* Only instantiate AC97 if not already done by the adaptor
1133 * for the generic AC97 subsystem.
1135 if (ac97 && strcmp(codec->name, "AC97") != 0) {
1136 ret = soc_ac97_dev_register(codec);
1138 printk(KERN_ERR "asoc: AC97 device register failed\n");
1139 snd_card_free(codec->card);
1140 mutex_unlock(&codec->mutex);
1146 ret = snd_soc_dapm_sys_add(card->socdev->dev);
1148 printk(KERN_WARNING "asoc: failed to add dapm sysfs entries\n");
1150 ret = device_create_file(card->socdev->dev, &dev_attr_pmdown_time);
1152 printk(KERN_WARNING "asoc: failed to add pmdown_time sysfs\n");
1154 ret = device_create_file(card->socdev->dev, &dev_attr_codec_reg);
1156 printk(KERN_WARNING "asoc: failed to add codec sysfs files\n");
1158 soc_init_codec_debugfs(codec);
1159 mutex_unlock(&codec->mutex);
1161 card->instantiated = 1;
1166 if (platform->remove)
1167 platform->remove(pdev);
1170 if (codec_dev->remove)
1171 codec_dev->remove(pdev);
1174 for (i--; i >= 0; i--) {
1175 struct snd_soc_dai *cpu_dai = card->dai_link[i].cpu_dai;
1176 if (cpu_dai->remove)
1177 cpu_dai->remove(pdev, cpu_dai);
1185 * Attempt to initialise any uninitalised cards. Must be called with
1188 static void snd_soc_instantiate_cards(void)
1190 struct snd_soc_card *card;
1191 list_for_each_entry(card, &card_list, list)
1192 snd_soc_instantiate_card(card);
1195 /* probes a new socdev */
1196 static int soc_probe(struct platform_device *pdev)
1199 struct snd_soc_device *socdev = platform_get_drvdata(pdev);
1200 struct snd_soc_card *card = socdev->card;
1202 /* Bodge while we push things out of socdev */
1203 card->socdev = socdev;
1205 /* Bodge while we unpick instantiation */
1206 card->dev = &pdev->dev;
1207 ret = snd_soc_register_card(card);
1209 dev_err(&pdev->dev, "Failed to register card\n");
1216 /* removes a socdev */
1217 static int soc_remove(struct platform_device *pdev)
1220 struct snd_soc_device *socdev = platform_get_drvdata(pdev);
1221 struct snd_soc_card *card = socdev->card;
1222 struct snd_soc_platform *platform = card->platform;
1223 struct snd_soc_codec_device *codec_dev = socdev->codec_dev;
1225 if (!card->instantiated)
1228 run_delayed_work(&card->delayed_work);
1230 if (platform->remove)
1231 platform->remove(pdev);
1233 if (codec_dev->remove)
1234 codec_dev->remove(pdev);
1236 for (i = 0; i < card->num_links; i++) {
1237 struct snd_soc_dai *cpu_dai = card->dai_link[i].cpu_dai;
1238 if (cpu_dai->remove)
1239 cpu_dai->remove(pdev, cpu_dai);
1245 snd_soc_unregister_card(card);
1250 static int soc_poweroff(struct device *dev)
1252 struct platform_device *pdev = to_platform_device(dev);
1253 struct snd_soc_device *socdev = platform_get_drvdata(pdev);
1254 struct snd_soc_card *card = socdev->card;
1256 if (!card->instantiated)
1259 /* Flush out pmdown_time work - we actually do want to run it
1260 * now, we're shutting down so no imminent restart. */
1261 run_delayed_work(&card->delayed_work);
1263 snd_soc_dapm_shutdown(socdev);
1268 static const struct dev_pm_ops soc_pm_ops = {
1269 .suspend = soc_suspend,
1270 .resume = soc_resume,
1271 .poweroff = soc_poweroff,
1274 /* ASoC platform driver */
1275 static struct platform_driver soc_driver = {
1277 .name = "soc-audio",
1278 .owner = THIS_MODULE,
1282 .remove = soc_remove,
1285 /* create a new pcm */
1286 static int soc_new_pcm(struct snd_soc_device *socdev,
1287 struct snd_soc_dai_link *dai_link, int num)
1289 struct snd_soc_card *card = socdev->card;
1290 struct snd_soc_codec *codec = card->codec;
1291 struct snd_soc_platform *platform = card->platform;
1292 struct snd_soc_dai *codec_dai = dai_link->codec_dai;
1293 struct snd_soc_dai *cpu_dai = dai_link->cpu_dai;
1294 struct snd_soc_pcm_runtime *rtd;
1295 struct snd_pcm *pcm;
1297 int ret = 0, playback = 0, capture = 0;
1299 rtd = kzalloc(sizeof(struct snd_soc_pcm_runtime), GFP_KERNEL);
1303 rtd->dai = dai_link;
1304 rtd->socdev = socdev;
1305 codec_dai->codec = card->codec;
1307 /* check client and interface hw capabilities */
1308 snprintf(new_name, sizeof(new_name), "%s %s-%d",
1309 dai_link->stream_name, codec_dai->name, num);
1311 if (codec_dai->playback.channels_min)
1313 if (codec_dai->capture.channels_min)
1316 ret = snd_pcm_new(codec->card, new_name, codec->pcm_devs++, playback,
1319 printk(KERN_ERR "asoc: can't create pcm for codec %s\n",
1325 dai_link->pcm = pcm;
1326 pcm->private_data = rtd;
1327 soc_pcm_ops.mmap = platform->pcm_ops->mmap;
1328 soc_pcm_ops.pointer = platform->pcm_ops->pointer;
1329 soc_pcm_ops.ioctl = platform->pcm_ops->ioctl;
1330 soc_pcm_ops.copy = platform->pcm_ops->copy;
1331 soc_pcm_ops.silence = platform->pcm_ops->silence;
1332 soc_pcm_ops.ack = platform->pcm_ops->ack;
1333 soc_pcm_ops.page = platform->pcm_ops->page;
1336 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &soc_pcm_ops);
1339 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &soc_pcm_ops);
1341 ret = platform->pcm_new(codec->card, codec_dai, pcm);
1343 printk(KERN_ERR "asoc: platform pcm constructor failed\n");
1348 pcm->private_free = platform->pcm_free;
1349 printk(KERN_INFO "asoc: %s <-> %s mapping ok\n", codec_dai->name,
1355 * snd_soc_codec_volatile_register: Report if a register is volatile.
1357 * @codec: CODEC to query.
1358 * @reg: Register to query.
1360 * Boolean function indiciating if a CODEC register is volatile.
1362 int snd_soc_codec_volatile_register(struct snd_soc_codec *codec, int reg)
1364 if (codec->volatile_register)
1365 return codec->volatile_register(reg);
1369 EXPORT_SYMBOL_GPL(snd_soc_codec_volatile_register);
1372 * snd_soc_new_ac97_codec - initailise AC97 device
1373 * @codec: audio codec
1374 * @ops: AC97 bus operations
1375 * @num: AC97 codec number
1377 * Initialises AC97 codec resources for use by ad-hoc devices only.
1379 int snd_soc_new_ac97_codec(struct snd_soc_codec *codec,
1380 struct snd_ac97_bus_ops *ops, int num)
1382 mutex_lock(&codec->mutex);
1384 codec->ac97 = kzalloc(sizeof(struct snd_ac97), GFP_KERNEL);
1385 if (codec->ac97 == NULL) {
1386 mutex_unlock(&codec->mutex);
1390 codec->ac97->bus = kzalloc(sizeof(struct snd_ac97_bus), GFP_KERNEL);
1391 if (codec->ac97->bus == NULL) {
1394 mutex_unlock(&codec->mutex);
1398 codec->ac97->bus->ops = ops;
1399 codec->ac97->num = num;
1400 codec->dev = &codec->ac97->dev;
1401 mutex_unlock(&codec->mutex);
1404 EXPORT_SYMBOL_GPL(snd_soc_new_ac97_codec);
1407 * snd_soc_free_ac97_codec - free AC97 codec device
1408 * @codec: audio codec
1410 * Frees AC97 codec device resources.
1412 void snd_soc_free_ac97_codec(struct snd_soc_codec *codec)
1414 mutex_lock(&codec->mutex);
1415 kfree(codec->ac97->bus);
1418 mutex_unlock(&codec->mutex);
1420 EXPORT_SYMBOL_GPL(snd_soc_free_ac97_codec);
1423 * snd_soc_update_bits - update codec register bits
1424 * @codec: audio codec
1425 * @reg: codec register
1426 * @mask: register mask
1429 * Writes new register value.
1431 * Returns 1 for change else 0.
1433 int snd_soc_update_bits(struct snd_soc_codec *codec, unsigned short reg,
1434 unsigned int mask, unsigned int value)
1437 unsigned int old, new;
1439 old = snd_soc_read(codec, reg);
1440 new = (old & ~mask) | value;
1441 change = old != new;
1443 snd_soc_write(codec, reg, new);
1447 EXPORT_SYMBOL_GPL(snd_soc_update_bits);
1450 * snd_soc_update_bits_locked - update codec register bits
1451 * @codec: audio codec
1452 * @reg: codec register
1453 * @mask: register mask
1456 * Writes new register value, and takes the codec mutex.
1458 * Returns 1 for change else 0.
1460 int snd_soc_update_bits_locked(struct snd_soc_codec *codec,
1461 unsigned short reg, unsigned int mask,
1466 mutex_lock(&codec->mutex);
1467 change = snd_soc_update_bits(codec, reg, mask, value);
1468 mutex_unlock(&codec->mutex);
1472 EXPORT_SYMBOL_GPL(snd_soc_update_bits_locked);
1475 * snd_soc_test_bits - test register for change
1476 * @codec: audio codec
1477 * @reg: codec register
1478 * @mask: register mask
1481 * Tests a register with a new value and checks if the new value is
1482 * different from the old value.
1484 * Returns 1 for change else 0.
1486 int snd_soc_test_bits(struct snd_soc_codec *codec, unsigned short reg,
1487 unsigned int mask, unsigned int value)
1490 unsigned int old, new;
1492 old = snd_soc_read(codec, reg);
1493 new = (old & ~mask) | value;
1494 change = old != new;
1498 EXPORT_SYMBOL_GPL(snd_soc_test_bits);
1501 * snd_soc_new_pcms - create new sound card and pcms
1502 * @socdev: the SoC audio device
1503 * @idx: ALSA card index
1504 * @xid: card identification
1506 * Create a new sound card based upon the codec and interface pcms.
1508 * Returns 0 for success, else error.
1510 int snd_soc_new_pcms(struct snd_soc_device *socdev, int idx, const char *xid)
1512 struct snd_soc_card *card = socdev->card;
1513 struct snd_soc_codec *codec = card->codec;
1516 mutex_lock(&codec->mutex);
1518 /* register a sound card */
1519 ret = snd_card_create(idx, xid, codec->owner, 0, &codec->card);
1521 printk(KERN_ERR "asoc: can't create sound card for codec %s\n",
1523 mutex_unlock(&codec->mutex);
1527 codec->socdev = socdev;
1528 codec->card->dev = socdev->dev;
1529 codec->card->private_data = codec;
1530 strncpy(codec->card->driver, codec->name, sizeof(codec->card->driver));
1532 /* create the pcms */
1533 for (i = 0; i < card->num_links; i++) {
1534 ret = soc_new_pcm(socdev, &card->dai_link[i], i);
1536 printk(KERN_ERR "asoc: can't create pcm %s\n",
1537 card->dai_link[i].stream_name);
1538 mutex_unlock(&codec->mutex);
1541 if (card->dai_link[i].codec_dai->ac97_control) {
1542 snd_ac97_dev_add_pdata(codec->ac97,
1543 card->dai_link[i].cpu_dai->ac97_pdata);
1547 mutex_unlock(&codec->mutex);
1550 EXPORT_SYMBOL_GPL(snd_soc_new_pcms);
1553 * snd_soc_free_pcms - free sound card and pcms
1554 * @socdev: the SoC audio device
1556 * Frees sound card and pcms associated with the socdev.
1557 * Also unregister the codec if it is an AC97 device.
1559 void snd_soc_free_pcms(struct snd_soc_device *socdev)
1561 struct snd_soc_codec *codec = socdev->card->codec;
1562 #ifdef CONFIG_SND_SOC_AC97_BUS
1563 struct snd_soc_dai *codec_dai;
1567 mutex_lock(&codec->mutex);
1568 soc_cleanup_codec_debugfs(codec);
1569 #ifdef CONFIG_SND_SOC_AC97_BUS
1570 for (i = 0; i < codec->num_dai; i++) {
1571 codec_dai = &codec->dai[i];
1572 if (codec_dai->ac97_control && codec->ac97 &&
1573 strcmp(codec->name, "AC97") != 0) {
1574 soc_ac97_dev_unregister(codec);
1582 snd_card_free(codec->card);
1583 device_remove_file(socdev->dev, &dev_attr_codec_reg);
1584 mutex_unlock(&codec->mutex);
1586 EXPORT_SYMBOL_GPL(snd_soc_free_pcms);
1589 * snd_soc_set_runtime_hwparams - set the runtime hardware parameters
1590 * @substream: the pcm substream
1591 * @hw: the hardware parameters
1593 * Sets the substream runtime hardware parameters.
1595 int snd_soc_set_runtime_hwparams(struct snd_pcm_substream *substream,
1596 const struct snd_pcm_hardware *hw)
1598 struct snd_pcm_runtime *runtime = substream->runtime;
1599 runtime->hw.info = hw->info;
1600 runtime->hw.formats = hw->formats;
1601 runtime->hw.period_bytes_min = hw->period_bytes_min;
1602 runtime->hw.period_bytes_max = hw->period_bytes_max;
1603 runtime->hw.periods_min = hw->periods_min;
1604 runtime->hw.periods_max = hw->periods_max;
1605 runtime->hw.buffer_bytes_max = hw->buffer_bytes_max;
1606 runtime->hw.fifo_size = hw->fifo_size;
1609 EXPORT_SYMBOL_GPL(snd_soc_set_runtime_hwparams);
1612 * snd_soc_cnew - create new control
1613 * @_template: control template
1614 * @data: control private data
1615 * @long_name: control long name
1617 * Create a new mixer control from a template control.
1619 * Returns 0 for success, else error.
1621 struct snd_kcontrol *snd_soc_cnew(const struct snd_kcontrol_new *_template,
1622 void *data, char *long_name)
1624 struct snd_kcontrol_new template;
1626 memcpy(&template, _template, sizeof(template));
1628 template.name = long_name;
1631 return snd_ctl_new1(&template, data);
1633 EXPORT_SYMBOL_GPL(snd_soc_cnew);
1636 * snd_soc_add_controls - add an array of controls to a codec.
1637 * Convienience function to add a list of controls. Many codecs were
1638 * duplicating this code.
1640 * @codec: codec to add controls to
1641 * @controls: array of controls to add
1642 * @num_controls: number of elements in the array
1644 * Return 0 for success, else error.
1646 int snd_soc_add_controls(struct snd_soc_codec *codec,
1647 const struct snd_kcontrol_new *controls, int num_controls)
1649 struct snd_card *card = codec->card;
1652 for (i = 0; i < num_controls; i++) {
1653 const struct snd_kcontrol_new *control = &controls[i];
1654 err = snd_ctl_add(card, snd_soc_cnew(control, codec, NULL));
1656 dev_err(codec->dev, "%s: Failed to add %s\n",
1657 codec->name, control->name);
1664 EXPORT_SYMBOL_GPL(snd_soc_add_controls);
1667 * snd_soc_info_enum_double - enumerated double mixer info callback
1668 * @kcontrol: mixer control
1669 * @uinfo: control element information
1671 * Callback to provide information about a double enumerated
1674 * Returns 0 for success.
1676 int snd_soc_info_enum_double(struct snd_kcontrol *kcontrol,
1677 struct snd_ctl_elem_info *uinfo)
1679 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
1681 uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
1682 uinfo->count = e->shift_l == e->shift_r ? 1 : 2;
1683 uinfo->value.enumerated.items = e->max;
1685 if (uinfo->value.enumerated.item > e->max - 1)
1686 uinfo->value.enumerated.item = e->max - 1;
1687 strcpy(uinfo->value.enumerated.name,
1688 e->texts[uinfo->value.enumerated.item]);
1691 EXPORT_SYMBOL_GPL(snd_soc_info_enum_double);
1694 * snd_soc_get_enum_double - enumerated double mixer get callback
1695 * @kcontrol: mixer control
1696 * @ucontrol: control element information
1698 * Callback to get the value of a double enumerated mixer.
1700 * Returns 0 for success.
1702 int snd_soc_get_enum_double(struct snd_kcontrol *kcontrol,
1703 struct snd_ctl_elem_value *ucontrol)
1705 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
1706 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
1707 unsigned int val, bitmask;
1709 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
1711 val = snd_soc_read(codec, e->reg);
1712 ucontrol->value.enumerated.item[0]
1713 = (val >> e->shift_l) & (bitmask - 1);
1714 if (e->shift_l != e->shift_r)
1715 ucontrol->value.enumerated.item[1] =
1716 (val >> e->shift_r) & (bitmask - 1);
1720 EXPORT_SYMBOL_GPL(snd_soc_get_enum_double);
1723 * snd_soc_put_enum_double - enumerated double mixer put callback
1724 * @kcontrol: mixer control
1725 * @ucontrol: control element information
1727 * Callback to set the value of a double enumerated mixer.
1729 * Returns 0 for success.
1731 int snd_soc_put_enum_double(struct snd_kcontrol *kcontrol,
1732 struct snd_ctl_elem_value *ucontrol)
1734 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
1735 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
1737 unsigned int mask, bitmask;
1739 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
1741 if (ucontrol->value.enumerated.item[0] > e->max - 1)
1743 val = ucontrol->value.enumerated.item[0] << e->shift_l;
1744 mask = (bitmask - 1) << e->shift_l;
1745 if (e->shift_l != e->shift_r) {
1746 if (ucontrol->value.enumerated.item[1] > e->max - 1)
1748 val |= ucontrol->value.enumerated.item[1] << e->shift_r;
1749 mask |= (bitmask - 1) << e->shift_r;
1752 return snd_soc_update_bits_locked(codec, e->reg, mask, val);
1754 EXPORT_SYMBOL_GPL(snd_soc_put_enum_double);
1757 * snd_soc_get_value_enum_double - semi enumerated double mixer get callback
1758 * @kcontrol: mixer control
1759 * @ucontrol: control element information
1761 * Callback to get the value of a double semi enumerated mixer.
1763 * Semi enumerated mixer: the enumerated items are referred as values. Can be
1764 * used for handling bitfield coded enumeration for example.
1766 * Returns 0 for success.
1768 int snd_soc_get_value_enum_double(struct snd_kcontrol *kcontrol,
1769 struct snd_ctl_elem_value *ucontrol)
1771 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
1772 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
1773 unsigned int reg_val, val, mux;
1775 reg_val = snd_soc_read(codec, e->reg);
1776 val = (reg_val >> e->shift_l) & e->mask;
1777 for (mux = 0; mux < e->max; mux++) {
1778 if (val == e->values[mux])
1781 ucontrol->value.enumerated.item[0] = mux;
1782 if (e->shift_l != e->shift_r) {
1783 val = (reg_val >> e->shift_r) & e->mask;
1784 for (mux = 0; mux < e->max; mux++) {
1785 if (val == e->values[mux])
1788 ucontrol->value.enumerated.item[1] = mux;
1793 EXPORT_SYMBOL_GPL(snd_soc_get_value_enum_double);
1796 * snd_soc_put_value_enum_double - semi enumerated double mixer put callback
1797 * @kcontrol: mixer control
1798 * @ucontrol: control element information
1800 * Callback to set the value of a double semi enumerated mixer.
1802 * Semi enumerated mixer: the enumerated items are referred as values. Can be
1803 * used for handling bitfield coded enumeration for example.
1805 * Returns 0 for success.
1807 int snd_soc_put_value_enum_double(struct snd_kcontrol *kcontrol,
1808 struct snd_ctl_elem_value *ucontrol)
1810 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
1811 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
1815 if (ucontrol->value.enumerated.item[0] > e->max - 1)
1817 val = e->values[ucontrol->value.enumerated.item[0]] << e->shift_l;
1818 mask = e->mask << e->shift_l;
1819 if (e->shift_l != e->shift_r) {
1820 if (ucontrol->value.enumerated.item[1] > e->max - 1)
1822 val |= e->values[ucontrol->value.enumerated.item[1]] << e->shift_r;
1823 mask |= e->mask << e->shift_r;
1826 return snd_soc_update_bits_locked(codec, e->reg, mask, val);
1828 EXPORT_SYMBOL_GPL(snd_soc_put_value_enum_double);
1831 * snd_soc_info_enum_ext - external enumerated single mixer info callback
1832 * @kcontrol: mixer control
1833 * @uinfo: control element information
1835 * Callback to provide information about an external enumerated
1838 * Returns 0 for success.
1840 int snd_soc_info_enum_ext(struct snd_kcontrol *kcontrol,
1841 struct snd_ctl_elem_info *uinfo)
1843 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
1845 uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
1847 uinfo->value.enumerated.items = e->max;
1849 if (uinfo->value.enumerated.item > e->max - 1)
1850 uinfo->value.enumerated.item = e->max - 1;
1851 strcpy(uinfo->value.enumerated.name,
1852 e->texts[uinfo->value.enumerated.item]);
1855 EXPORT_SYMBOL_GPL(snd_soc_info_enum_ext);
1858 * snd_soc_info_volsw_ext - external single mixer info callback
1859 * @kcontrol: mixer control
1860 * @uinfo: control element information
1862 * Callback to provide information about a single external mixer control.
1864 * Returns 0 for success.
1866 int snd_soc_info_volsw_ext(struct snd_kcontrol *kcontrol,
1867 struct snd_ctl_elem_info *uinfo)
1869 int max = kcontrol->private_value;
1871 if (max == 1 && !strstr(kcontrol->id.name, " Volume"))
1872 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
1874 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
1877 uinfo->value.integer.min = 0;
1878 uinfo->value.integer.max = max;
1881 EXPORT_SYMBOL_GPL(snd_soc_info_volsw_ext);
1884 * snd_soc_info_volsw - single mixer info callback
1885 * @kcontrol: mixer control
1886 * @uinfo: control element information
1888 * Callback to provide information about a single mixer control.
1890 * Returns 0 for success.
1892 int snd_soc_info_volsw(struct snd_kcontrol *kcontrol,
1893 struct snd_ctl_elem_info *uinfo)
1895 struct soc_mixer_control *mc =
1896 (struct soc_mixer_control *)kcontrol->private_value;
1898 unsigned int shift = mc->shift;
1899 unsigned int rshift = mc->rshift;
1901 if (max == 1 && !strstr(kcontrol->id.name, " Volume"))
1902 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
1904 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
1906 uinfo->count = shift == rshift ? 1 : 2;
1907 uinfo->value.integer.min = 0;
1908 uinfo->value.integer.max = max;
1911 EXPORT_SYMBOL_GPL(snd_soc_info_volsw);
1914 * snd_soc_get_volsw - single mixer get callback
1915 * @kcontrol: mixer control
1916 * @ucontrol: control element information
1918 * Callback to get the value of a single mixer control.
1920 * Returns 0 for success.
1922 int snd_soc_get_volsw(struct snd_kcontrol *kcontrol,
1923 struct snd_ctl_elem_value *ucontrol)
1925 struct soc_mixer_control *mc =
1926 (struct soc_mixer_control *)kcontrol->private_value;
1927 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
1928 unsigned int reg = mc->reg;
1929 unsigned int shift = mc->shift;
1930 unsigned int rshift = mc->rshift;
1932 unsigned int mask = (1 << fls(max)) - 1;
1933 unsigned int invert = mc->invert;
1935 ucontrol->value.integer.value[0] =
1936 (snd_soc_read(codec, reg) >> shift) & mask;
1937 if (shift != rshift)
1938 ucontrol->value.integer.value[1] =
1939 (snd_soc_read(codec, reg) >> rshift) & mask;
1941 ucontrol->value.integer.value[0] =
1942 max - ucontrol->value.integer.value[0];
1943 if (shift != rshift)
1944 ucontrol->value.integer.value[1] =
1945 max - ucontrol->value.integer.value[1];
1950 EXPORT_SYMBOL_GPL(snd_soc_get_volsw);
1953 * snd_soc_put_volsw - single mixer put callback
1954 * @kcontrol: mixer control
1955 * @ucontrol: control element information
1957 * Callback to set the value of a single mixer control.
1959 * Returns 0 for success.
1961 int snd_soc_put_volsw(struct snd_kcontrol *kcontrol,
1962 struct snd_ctl_elem_value *ucontrol)
1964 struct soc_mixer_control *mc =
1965 (struct soc_mixer_control *)kcontrol->private_value;
1966 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
1967 unsigned int reg = mc->reg;
1968 unsigned int shift = mc->shift;
1969 unsigned int rshift = mc->rshift;
1971 unsigned int mask = (1 << fls(max)) - 1;
1972 unsigned int invert = mc->invert;
1973 unsigned int val, val2, val_mask;
1975 val = (ucontrol->value.integer.value[0] & mask);
1978 val_mask = mask << shift;
1980 if (shift != rshift) {
1981 val2 = (ucontrol->value.integer.value[1] & mask);
1984 val_mask |= mask << rshift;
1985 val |= val2 << rshift;
1987 return snd_soc_update_bits_locked(codec, reg, val_mask, val);
1989 EXPORT_SYMBOL_GPL(snd_soc_put_volsw);
1992 * snd_soc_info_volsw_2r - double mixer info callback
1993 * @kcontrol: mixer control
1994 * @uinfo: control element information
1996 * Callback to provide information about a double mixer control that
1997 * spans 2 codec registers.
1999 * Returns 0 for success.
2001 int snd_soc_info_volsw_2r(struct snd_kcontrol *kcontrol,
2002 struct snd_ctl_elem_info *uinfo)
2004 struct soc_mixer_control *mc =
2005 (struct soc_mixer_control *)kcontrol->private_value;
2008 if (max == 1 && !strstr(kcontrol->id.name, " Volume"))
2009 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
2011 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
2014 uinfo->value.integer.min = 0;
2015 uinfo->value.integer.max = max;
2018 EXPORT_SYMBOL_GPL(snd_soc_info_volsw_2r);
2021 * snd_soc_get_volsw_2r - double mixer get callback
2022 * @kcontrol: mixer control
2023 * @ucontrol: control element information
2025 * Callback to get the value of a double mixer control that spans 2 registers.
2027 * Returns 0 for success.
2029 int snd_soc_get_volsw_2r(struct snd_kcontrol *kcontrol,
2030 struct snd_ctl_elem_value *ucontrol)
2032 struct soc_mixer_control *mc =
2033 (struct soc_mixer_control *)kcontrol->private_value;
2034 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2035 unsigned int reg = mc->reg;
2036 unsigned int reg2 = mc->rreg;
2037 unsigned int shift = mc->shift;
2039 unsigned int mask = (1 << fls(max)) - 1;
2040 unsigned int invert = mc->invert;
2042 ucontrol->value.integer.value[0] =
2043 (snd_soc_read(codec, reg) >> shift) & mask;
2044 ucontrol->value.integer.value[1] =
2045 (snd_soc_read(codec, reg2) >> shift) & mask;
2047 ucontrol->value.integer.value[0] =
2048 max - ucontrol->value.integer.value[0];
2049 ucontrol->value.integer.value[1] =
2050 max - ucontrol->value.integer.value[1];
2055 EXPORT_SYMBOL_GPL(snd_soc_get_volsw_2r);
2058 * snd_soc_put_volsw_2r - double mixer set callback
2059 * @kcontrol: mixer control
2060 * @ucontrol: control element information
2062 * Callback to set the value of a double mixer control that spans 2 registers.
2064 * Returns 0 for success.
2066 int snd_soc_put_volsw_2r(struct snd_kcontrol *kcontrol,
2067 struct snd_ctl_elem_value *ucontrol)
2069 struct soc_mixer_control *mc =
2070 (struct soc_mixer_control *)kcontrol->private_value;
2071 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2072 unsigned int reg = mc->reg;
2073 unsigned int reg2 = mc->rreg;
2074 unsigned int shift = mc->shift;
2076 unsigned int mask = (1 << fls(max)) - 1;
2077 unsigned int invert = mc->invert;
2079 unsigned int val, val2, val_mask;
2081 val_mask = mask << shift;
2082 val = (ucontrol->value.integer.value[0] & mask);
2083 val2 = (ucontrol->value.integer.value[1] & mask);
2091 val2 = val2 << shift;
2093 err = snd_soc_update_bits_locked(codec, reg, val_mask, val);
2097 err = snd_soc_update_bits_locked(codec, reg2, val_mask, val2);
2100 EXPORT_SYMBOL_GPL(snd_soc_put_volsw_2r);
2103 * snd_soc_info_volsw_s8 - signed mixer info callback
2104 * @kcontrol: mixer control
2105 * @uinfo: control element information
2107 * Callback to provide information about a signed mixer control.
2109 * Returns 0 for success.
2111 int snd_soc_info_volsw_s8(struct snd_kcontrol *kcontrol,
2112 struct snd_ctl_elem_info *uinfo)
2114 struct soc_mixer_control *mc =
2115 (struct soc_mixer_control *)kcontrol->private_value;
2119 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
2121 uinfo->value.integer.min = 0;
2122 uinfo->value.integer.max = max-min;
2125 EXPORT_SYMBOL_GPL(snd_soc_info_volsw_s8);
2128 * snd_soc_get_volsw_s8 - signed mixer get callback
2129 * @kcontrol: mixer control
2130 * @ucontrol: control element information
2132 * Callback to get the value of a signed mixer control.
2134 * Returns 0 for success.
2136 int snd_soc_get_volsw_s8(struct snd_kcontrol *kcontrol,
2137 struct snd_ctl_elem_value *ucontrol)
2139 struct soc_mixer_control *mc =
2140 (struct soc_mixer_control *)kcontrol->private_value;
2141 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2142 unsigned int reg = mc->reg;
2144 int val = snd_soc_read(codec, reg);
2146 ucontrol->value.integer.value[0] =
2147 ((signed char)(val & 0xff))-min;
2148 ucontrol->value.integer.value[1] =
2149 ((signed char)((val >> 8) & 0xff))-min;
2152 EXPORT_SYMBOL_GPL(snd_soc_get_volsw_s8);
2155 * snd_soc_put_volsw_sgn - signed mixer put callback
2156 * @kcontrol: mixer control
2157 * @ucontrol: control element information
2159 * Callback to set the value of a signed mixer control.
2161 * Returns 0 for success.
2163 int snd_soc_put_volsw_s8(struct snd_kcontrol *kcontrol,
2164 struct snd_ctl_elem_value *ucontrol)
2166 struct soc_mixer_control *mc =
2167 (struct soc_mixer_control *)kcontrol->private_value;
2168 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2169 unsigned int reg = mc->reg;
2173 val = (ucontrol->value.integer.value[0]+min) & 0xff;
2174 val |= ((ucontrol->value.integer.value[1]+min) & 0xff) << 8;
2176 return snd_soc_update_bits_locked(codec, reg, 0xffff, val);
2178 EXPORT_SYMBOL_GPL(snd_soc_put_volsw_s8);
2181 * snd_soc_dai_set_sysclk - configure DAI system or master clock.
2183 * @clk_id: DAI specific clock ID
2184 * @freq: new clock frequency in Hz
2185 * @dir: new clock direction - input/output.
2187 * Configures the DAI master (MCLK) or system (SYSCLK) clocking.
2189 int snd_soc_dai_set_sysclk(struct snd_soc_dai *dai, int clk_id,
2190 unsigned int freq, int dir)
2192 if (dai->ops && dai->ops->set_sysclk)
2193 return dai->ops->set_sysclk(dai, clk_id, freq, dir);
2197 EXPORT_SYMBOL_GPL(snd_soc_dai_set_sysclk);
2200 * snd_soc_dai_set_clkdiv - configure DAI clock dividers.
2202 * @div_id: DAI specific clock divider ID
2203 * @div: new clock divisor.
2205 * Configures the clock dividers. This is used to derive the best DAI bit and
2206 * frame clocks from the system or master clock. It's best to set the DAI bit
2207 * and frame clocks as low as possible to save system power.
2209 int snd_soc_dai_set_clkdiv(struct snd_soc_dai *dai,
2210 int div_id, int div)
2212 if (dai->ops && dai->ops->set_clkdiv)
2213 return dai->ops->set_clkdiv(dai, div_id, div);
2217 EXPORT_SYMBOL_GPL(snd_soc_dai_set_clkdiv);
2220 * snd_soc_dai_set_pll - configure DAI PLL.
2222 * @pll_id: DAI specific PLL ID
2223 * @source: DAI specific source for the PLL
2224 * @freq_in: PLL input clock frequency in Hz
2225 * @freq_out: requested PLL output clock frequency in Hz
2227 * Configures and enables PLL to generate output clock based on input clock.
2229 int snd_soc_dai_set_pll(struct snd_soc_dai *dai, int pll_id, int source,
2230 unsigned int freq_in, unsigned int freq_out)
2232 if (dai->ops && dai->ops->set_pll)
2233 return dai->ops->set_pll(dai, pll_id, source,
2238 EXPORT_SYMBOL_GPL(snd_soc_dai_set_pll);
2241 * snd_soc_dai_set_fmt - configure DAI hardware audio format.
2243 * @fmt: SND_SOC_DAIFMT_ format value.
2245 * Configures the DAI hardware format and clocking.
2247 int snd_soc_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
2249 if (dai->ops && dai->ops->set_fmt)
2250 return dai->ops->set_fmt(dai, fmt);
2254 EXPORT_SYMBOL_GPL(snd_soc_dai_set_fmt);
2257 * snd_soc_dai_set_tdm_slot - configure DAI TDM.
2259 * @tx_mask: bitmask representing active TX slots.
2260 * @rx_mask: bitmask representing active RX slots.
2261 * @slots: Number of slots in use.
2262 * @slot_width: Width in bits for each slot.
2264 * Configures a DAI for TDM operation. Both mask and slots are codec and DAI
2267 int snd_soc_dai_set_tdm_slot(struct snd_soc_dai *dai,
2268 unsigned int tx_mask, unsigned int rx_mask, int slots, int slot_width)
2270 if (dai->ops && dai->ops->set_tdm_slot)
2271 return dai->ops->set_tdm_slot(dai, tx_mask, rx_mask,
2276 EXPORT_SYMBOL_GPL(snd_soc_dai_set_tdm_slot);
2279 * snd_soc_dai_set_channel_map - configure DAI audio channel map
2281 * @tx_num: how many TX channels
2282 * @tx_slot: pointer to an array which imply the TX slot number channel
2284 * @rx_num: how many RX channels
2285 * @rx_slot: pointer to an array which imply the RX slot number channel
2288 * configure the relationship between channel number and TDM slot number.
2290 int snd_soc_dai_set_channel_map(struct snd_soc_dai *dai,
2291 unsigned int tx_num, unsigned int *tx_slot,
2292 unsigned int rx_num, unsigned int *rx_slot)
2294 if (dai->ops && dai->ops->set_channel_map)
2295 return dai->ops->set_channel_map(dai, tx_num, tx_slot,
2300 EXPORT_SYMBOL_GPL(snd_soc_dai_set_channel_map);
2303 * snd_soc_dai_set_tristate - configure DAI system or master clock.
2305 * @tristate: tristate enable
2307 * Tristates the DAI so that others can use it.
2309 int snd_soc_dai_set_tristate(struct snd_soc_dai *dai, int tristate)
2311 if (dai->ops && dai->ops->set_tristate)
2312 return dai->ops->set_tristate(dai, tristate);
2316 EXPORT_SYMBOL_GPL(snd_soc_dai_set_tristate);
2319 * snd_soc_dai_digital_mute - configure DAI system or master clock.
2321 * @mute: mute enable
2323 * Mutes the DAI DAC.
2325 int snd_soc_dai_digital_mute(struct snd_soc_dai *dai, int mute)
2327 if (dai->ops && dai->ops->digital_mute)
2328 return dai->ops->digital_mute(dai, mute);
2332 EXPORT_SYMBOL_GPL(snd_soc_dai_digital_mute);
2335 * snd_soc_register_card - Register a card with the ASoC core
2337 * @card: Card to register
2339 * Note that currently this is an internal only function: it will be
2340 * exposed to machine drivers after further backporting of ASoC v2
2341 * registration APIs.
2343 static int snd_soc_register_card(struct snd_soc_card *card)
2345 if (!card->name || !card->dev)
2348 INIT_LIST_HEAD(&card->list);
2349 card->instantiated = 0;
2351 mutex_lock(&client_mutex);
2352 list_add(&card->list, &card_list);
2353 snd_soc_instantiate_cards();
2354 mutex_unlock(&client_mutex);
2356 dev_dbg(card->dev, "Registered card '%s'\n", card->name);
2362 * snd_soc_unregister_card - Unregister a card with the ASoC core
2364 * @card: Card to unregister
2366 * Note that currently this is an internal only function: it will be
2367 * exposed to machine drivers after further backporting of ASoC v2
2368 * registration APIs.
2370 static int snd_soc_unregister_card(struct snd_soc_card *card)
2372 mutex_lock(&client_mutex);
2373 list_del(&card->list);
2374 mutex_unlock(&client_mutex);
2376 dev_dbg(card->dev, "Unregistered card '%s'\n", card->name);
2382 * snd_soc_register_dai - Register a DAI with the ASoC core
2384 * @dai: DAI to register
2386 int snd_soc_register_dai(struct snd_soc_dai *dai)
2391 /* The device should become mandatory over time */
2393 printk(KERN_WARNING "No device for DAI %s\n", dai->name);
2396 dai->ops = &null_dai_ops;
2398 INIT_LIST_HEAD(&dai->list);
2400 mutex_lock(&client_mutex);
2401 list_add(&dai->list, &dai_list);
2402 snd_soc_instantiate_cards();
2403 mutex_unlock(&client_mutex);
2405 pr_debug("Registered DAI '%s'\n", dai->name);
2409 EXPORT_SYMBOL_GPL(snd_soc_register_dai);
2412 * snd_soc_unregister_dai - Unregister a DAI from the ASoC core
2414 * @dai: DAI to unregister
2416 void snd_soc_unregister_dai(struct snd_soc_dai *dai)
2418 mutex_lock(&client_mutex);
2419 list_del(&dai->list);
2420 mutex_unlock(&client_mutex);
2422 pr_debug("Unregistered DAI '%s'\n", dai->name);
2424 EXPORT_SYMBOL_GPL(snd_soc_unregister_dai);
2427 * snd_soc_register_dais - Register multiple DAIs with the ASoC core
2429 * @dai: Array of DAIs to register
2430 * @count: Number of DAIs
2432 int snd_soc_register_dais(struct snd_soc_dai *dai, size_t count)
2436 for (i = 0; i < count; i++) {
2437 ret = snd_soc_register_dai(&dai[i]);
2445 for (i--; i >= 0; i--)
2446 snd_soc_unregister_dai(&dai[i]);
2450 EXPORT_SYMBOL_GPL(snd_soc_register_dais);
2453 * snd_soc_unregister_dais - Unregister multiple DAIs from the ASoC core
2455 * @dai: Array of DAIs to unregister
2456 * @count: Number of DAIs
2458 void snd_soc_unregister_dais(struct snd_soc_dai *dai, size_t count)
2462 for (i = 0; i < count; i++)
2463 snd_soc_unregister_dai(&dai[i]);
2465 EXPORT_SYMBOL_GPL(snd_soc_unregister_dais);
2468 * snd_soc_register_platform - Register a platform with the ASoC core
2470 * @platform: platform to register
2472 int snd_soc_register_platform(struct snd_soc_platform *platform)
2474 if (!platform->name)
2477 INIT_LIST_HEAD(&platform->list);
2479 mutex_lock(&client_mutex);
2480 list_add(&platform->list, &platform_list);
2481 snd_soc_instantiate_cards();
2482 mutex_unlock(&client_mutex);
2484 pr_debug("Registered platform '%s'\n", platform->name);
2488 EXPORT_SYMBOL_GPL(snd_soc_register_platform);
2491 * snd_soc_unregister_platform - Unregister a platform from the ASoC core
2493 * @platform: platform to unregister
2495 void snd_soc_unregister_platform(struct snd_soc_platform *platform)
2497 mutex_lock(&client_mutex);
2498 list_del(&platform->list);
2499 mutex_unlock(&client_mutex);
2501 pr_debug("Unregistered platform '%s'\n", platform->name);
2503 EXPORT_SYMBOL_GPL(snd_soc_unregister_platform);
2505 static u64 codec_format_map[] = {
2506 SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S16_BE,
2507 SNDRV_PCM_FMTBIT_U16_LE | SNDRV_PCM_FMTBIT_U16_BE,
2508 SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S24_BE,
2509 SNDRV_PCM_FMTBIT_U24_LE | SNDRV_PCM_FMTBIT_U24_BE,
2510 SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_S32_BE,
2511 SNDRV_PCM_FMTBIT_U32_LE | SNDRV_PCM_FMTBIT_U32_BE,
2512 SNDRV_PCM_FMTBIT_S24_3LE | SNDRV_PCM_FMTBIT_U24_3BE,
2513 SNDRV_PCM_FMTBIT_U24_3LE | SNDRV_PCM_FMTBIT_U24_3BE,
2514 SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S20_3BE,
2515 SNDRV_PCM_FMTBIT_U20_3LE | SNDRV_PCM_FMTBIT_U20_3BE,
2516 SNDRV_PCM_FMTBIT_S18_3LE | SNDRV_PCM_FMTBIT_S18_3BE,
2517 SNDRV_PCM_FMTBIT_U18_3LE | SNDRV_PCM_FMTBIT_U18_3BE,
2518 SNDRV_PCM_FMTBIT_FLOAT_LE | SNDRV_PCM_FMTBIT_FLOAT_BE,
2519 SNDRV_PCM_FMTBIT_FLOAT64_LE | SNDRV_PCM_FMTBIT_FLOAT64_BE,
2520 SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE
2521 | SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_BE,
2524 /* Fix up the DAI formats for endianness: codecs don't actually see
2525 * the endianness of the data but we're using the CPU format
2526 * definitions which do need to include endianness so we ensure that
2527 * codec DAIs always have both big and little endian variants set.
2529 static void fixup_codec_formats(struct snd_soc_pcm_stream *stream)
2533 for (i = 0; i < ARRAY_SIZE(codec_format_map); i++)
2534 if (stream->formats & codec_format_map[i])
2535 stream->formats |= codec_format_map[i];
2539 * snd_soc_register_codec - Register a codec with the ASoC core
2541 * @codec: codec to register
2543 int snd_soc_register_codec(struct snd_soc_codec *codec)
2550 /* The device should become mandatory over time */
2552 printk(KERN_WARNING "No device for codec %s\n", codec->name);
2554 INIT_LIST_HEAD(&codec->list);
2556 for (i = 0; i < codec->num_dai; i++) {
2557 fixup_codec_formats(&codec->dai[i].playback);
2558 fixup_codec_formats(&codec->dai[i].capture);
2561 mutex_lock(&client_mutex);
2562 list_add(&codec->list, &codec_list);
2563 snd_soc_instantiate_cards();
2564 mutex_unlock(&client_mutex);
2566 pr_debug("Registered codec '%s'\n", codec->name);
2570 EXPORT_SYMBOL_GPL(snd_soc_register_codec);
2573 * snd_soc_unregister_codec - Unregister a codec from the ASoC core
2575 * @codec: codec to unregister
2577 void snd_soc_unregister_codec(struct snd_soc_codec *codec)
2579 mutex_lock(&client_mutex);
2580 list_del(&codec->list);
2581 mutex_unlock(&client_mutex);
2583 pr_debug("Unregistered codec '%s'\n", codec->name);
2585 EXPORT_SYMBOL_GPL(snd_soc_unregister_codec);
2587 static int __init snd_soc_init(void)
2589 #ifdef CONFIG_DEBUG_FS
2590 debugfs_root = debugfs_create_dir("asoc", NULL);
2591 if (IS_ERR(debugfs_root) || !debugfs_root) {
2593 "ASoC: Failed to create debugfs directory\n");
2594 debugfs_root = NULL;
2598 return platform_driver_register(&soc_driver);
2601 static void __exit snd_soc_exit(void)
2603 #ifdef CONFIG_DEBUG_FS
2604 debugfs_remove_recursive(debugfs_root);
2606 platform_driver_unregister(&soc_driver);
2609 module_init(snd_soc_init);
2610 module_exit(snd_soc_exit);
2612 /* Module information */
2613 MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
2614 MODULE_DESCRIPTION("ALSA SoC Core");
2615 MODULE_LICENSE("GPL");
2616 MODULE_ALIAS("platform:soc-audio");