2 * soc-core.c -- ALSA SoC Audio Layer
4 * Copyright 2005 Wolfson Microelectronics PLC.
5 * Copyright 2005 Openedhand Ltd.
6 * Copyright (C) 2010 Slimlogic Ltd.
7 * Copyright (C) 2010 Texas Instruments Inc.
9 * Author: Liam Girdwood <lrg@slimlogic.co.uk>
10 * with code, comments and ideas from :-
11 * Richard Purdie <richard@openedhand.com>
13 * This program is free software; you can redistribute it and/or modify it
14 * under the terms of the GNU General Public License as published by the
15 * Free Software Foundation; either version 2 of the License, or (at your
16 * option) any later version.
19 * o Add hw rules to enforce rates, etc.
20 * o More testing with other codecs/machines.
21 * o Add more codecs and platforms to ensure good API coverage.
22 * o Support TDM on PCM and I2S
25 #include <linux/module.h>
26 #include <linux/moduleparam.h>
27 #include <linux/init.h>
28 #include <linux/delay.h>
30 #include <linux/bitops.h>
31 #include <linux/debugfs.h>
32 #include <linux/platform_device.h>
33 #include <linux/pinctrl/consumer.h>
34 #include <linux/ctype.h>
35 #include <linux/slab.h>
37 #include <sound/core.h>
38 #include <sound/jack.h>
39 #include <sound/pcm.h>
40 #include <sound/pcm_params.h>
41 #include <sound/soc.h>
42 #include <sound/soc-dpcm.h>
43 #include <sound/initval.h>
45 #define CREATE_TRACE_POINTS
46 #include <trace/events/asoc.h>
50 #ifdef CONFIG_DEBUG_FS
51 struct dentry *snd_soc_debugfs_root;
52 EXPORT_SYMBOL_GPL(snd_soc_debugfs_root);
55 static DEFINE_MUTEX(client_mutex);
56 static LIST_HEAD(platform_list);
57 static LIST_HEAD(codec_list);
58 static LIST_HEAD(component_list);
61 * This is a timeout to do a DAPM powerdown after a stream is closed().
62 * It can be used to eliminate pops between different playback streams, e.g.
63 * between two audio tracks.
65 static int pmdown_time = 5000;
66 module_param(pmdown_time, int, 0);
67 MODULE_PARM_DESC(pmdown_time, "DAPM stream powerdown time (msecs)");
69 /* returns the minimum number of bytes needed to represent
70 * a particular given value */
71 static int min_bytes_needed(unsigned long val)
76 for (i = (sizeof val * 8) - 1; i >= 0; --i, ++c)
79 c = (sizeof val * 8) - c;
87 /* fill buf which is 'len' bytes with a formatted
88 * string of the form 'reg: value\n' */
89 static int format_register_str(struct snd_soc_codec *codec,
90 unsigned int reg, char *buf, size_t len)
92 int wordsize = min_bytes_needed(codec->driver->reg_cache_size) * 2;
93 int regsize = codec->driver->reg_word_size * 2;
96 char regbuf[regsize + 1];
98 /* since tmpbuf is allocated on the stack, warn the callers if they
99 * try to abuse this function */
102 /* +2 for ': ' and + 1 for '\n' */
103 if (wordsize + regsize + 2 + 1 != len)
106 ret = snd_soc_read(codec, reg);
108 memset(regbuf, 'X', regsize);
109 regbuf[regsize] = '\0';
111 snprintf(regbuf, regsize + 1, "%.*x", regsize, ret);
114 /* prepare the buffer */
115 snprintf(tmpbuf, len + 1, "%.*x: %s\n", wordsize, reg, regbuf);
116 /* copy it back to the caller without the '\0' */
117 memcpy(buf, tmpbuf, len);
122 /* codec register dump */
123 static ssize_t soc_codec_reg_show(struct snd_soc_codec *codec, char *buf,
124 size_t count, loff_t pos)
127 int wordsize, regsize;
132 wordsize = min_bytes_needed(codec->driver->reg_cache_size) * 2;
133 regsize = codec->driver->reg_word_size * 2;
135 len = wordsize + regsize + 2 + 1;
137 if (!codec->driver->reg_cache_size)
140 if (codec->driver->reg_cache_step)
141 step = codec->driver->reg_cache_step;
143 for (i = 0; i < codec->driver->reg_cache_size; i += step) {
144 /* only support larger than PAGE_SIZE bytes debugfs
145 * entries for the default case */
147 if (total + len >= count - 1)
149 format_register_str(codec, i, buf + total, len);
155 total = min(total, count - 1);
160 static ssize_t codec_reg_show(struct device *dev,
161 struct device_attribute *attr, char *buf)
163 struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev);
165 return soc_codec_reg_show(rtd->codec, buf, PAGE_SIZE, 0);
168 static DEVICE_ATTR(codec_reg, 0444, codec_reg_show, NULL);
170 static ssize_t pmdown_time_show(struct device *dev,
171 struct device_attribute *attr, char *buf)
173 struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev);
175 return sprintf(buf, "%ld\n", rtd->pmdown_time);
178 static ssize_t pmdown_time_set(struct device *dev,
179 struct device_attribute *attr,
180 const char *buf, size_t count)
182 struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev);
185 ret = kstrtol(buf, 10, &rtd->pmdown_time);
192 static DEVICE_ATTR(pmdown_time, 0644, pmdown_time_show, pmdown_time_set);
194 static struct attribute *soc_dev_attrs[] = {
195 &dev_attr_codec_reg.attr,
196 &dev_attr_pmdown_time.attr,
200 static umode_t soc_dev_attr_is_visible(struct kobject *kobj,
201 struct attribute *attr, int idx)
203 struct device *dev = kobj_to_dev(kobj);
204 struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev);
206 if (attr == &dev_attr_pmdown_time.attr)
207 return attr->mode; /* always visible */
208 return rtd->codec ? attr->mode : 0; /* enabled only with codec */
211 static const struct attribute_group soc_dapm_dev_group = {
212 .attrs = soc_dapm_dev_attrs,
213 .is_visible = soc_dev_attr_is_visible,
216 static const struct attribute_group soc_dev_roup = {
217 .attrs = soc_dev_attrs,
218 .is_visible = soc_dev_attr_is_visible,
221 static const struct attribute_group *soc_dev_attr_groups[] = {
227 #ifdef CONFIG_DEBUG_FS
228 static ssize_t codec_reg_read_file(struct file *file, char __user *user_buf,
229 size_t count, loff_t *ppos)
232 struct snd_soc_codec *codec = file->private_data;
235 if (*ppos < 0 || !count)
238 buf = kmalloc(count, GFP_KERNEL);
242 ret = soc_codec_reg_show(codec, buf, count, *ppos);
244 if (copy_to_user(user_buf, buf, ret)) {
255 static ssize_t codec_reg_write_file(struct file *file,
256 const char __user *user_buf, size_t count, loff_t *ppos)
261 unsigned long reg, value;
262 struct snd_soc_codec *codec = file->private_data;
265 buf_size = min(count, (sizeof(buf)-1));
266 if (copy_from_user(buf, user_buf, buf_size))
270 while (*start == ' ')
272 reg = simple_strtoul(start, &start, 16);
273 while (*start == ' ')
275 ret = kstrtoul(start, 16, &value);
279 /* Userspace has been fiddling around behind the kernel's back */
280 add_taint(TAINT_USER, LOCKDEP_NOW_UNRELIABLE);
282 snd_soc_write(codec, reg, value);
286 static const struct file_operations codec_reg_fops = {
288 .read = codec_reg_read_file,
289 .write = codec_reg_write_file,
290 .llseek = default_llseek,
293 static void soc_init_component_debugfs(struct snd_soc_component *component)
295 if (!component->card->debugfs_card_root)
298 if (component->debugfs_prefix) {
301 name = kasprintf(GFP_KERNEL, "%s:%s",
302 component->debugfs_prefix, component->name);
304 component->debugfs_root = debugfs_create_dir(name,
305 component->card->debugfs_card_root);
309 component->debugfs_root = debugfs_create_dir(component->name,
310 component->card->debugfs_card_root);
313 if (!component->debugfs_root) {
314 dev_warn(component->dev,
315 "ASoC: Failed to create component debugfs directory\n");
319 snd_soc_dapm_debugfs_init(snd_soc_component_get_dapm(component),
320 component->debugfs_root);
322 if (component->init_debugfs)
323 component->init_debugfs(component);
326 static void soc_cleanup_component_debugfs(struct snd_soc_component *component)
328 debugfs_remove_recursive(component->debugfs_root);
331 static void soc_init_codec_debugfs(struct snd_soc_component *component)
333 struct snd_soc_codec *codec = snd_soc_component_to_codec(component);
335 codec->debugfs_reg = debugfs_create_file("codec_reg", 0644,
336 codec->component.debugfs_root,
337 codec, &codec_reg_fops);
338 if (!codec->debugfs_reg)
340 "ASoC: Failed to create codec register debugfs file\n");
343 static ssize_t codec_list_read_file(struct file *file, char __user *user_buf,
344 size_t count, loff_t *ppos)
346 char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
347 ssize_t len, ret = 0;
348 struct snd_soc_codec *codec;
353 mutex_lock(&client_mutex);
355 list_for_each_entry(codec, &codec_list, list) {
356 len = snprintf(buf + ret, PAGE_SIZE - ret, "%s\n",
357 codec->component.name);
360 if (ret > PAGE_SIZE) {
366 mutex_unlock(&client_mutex);
369 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
376 static const struct file_operations codec_list_fops = {
377 .read = codec_list_read_file,
378 .llseek = default_llseek,/* read accesses f_pos */
381 static ssize_t dai_list_read_file(struct file *file, char __user *user_buf,
382 size_t count, loff_t *ppos)
384 char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
385 ssize_t len, ret = 0;
386 struct snd_soc_component *component;
387 struct snd_soc_dai *dai;
392 mutex_lock(&client_mutex);
394 list_for_each_entry(component, &component_list, list) {
395 list_for_each_entry(dai, &component->dai_list, list) {
396 len = snprintf(buf + ret, PAGE_SIZE - ret, "%s\n",
400 if (ret > PAGE_SIZE) {
407 mutex_unlock(&client_mutex);
409 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
416 static const struct file_operations dai_list_fops = {
417 .read = dai_list_read_file,
418 .llseek = default_llseek,/* read accesses f_pos */
421 static ssize_t platform_list_read_file(struct file *file,
422 char __user *user_buf,
423 size_t count, loff_t *ppos)
425 char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
426 ssize_t len, ret = 0;
427 struct snd_soc_platform *platform;
432 mutex_lock(&client_mutex);
434 list_for_each_entry(platform, &platform_list, list) {
435 len = snprintf(buf + ret, PAGE_SIZE - ret, "%s\n",
436 platform->component.name);
439 if (ret > PAGE_SIZE) {
445 mutex_unlock(&client_mutex);
447 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
454 static const struct file_operations platform_list_fops = {
455 .read = platform_list_read_file,
456 .llseek = default_llseek,/* read accesses f_pos */
459 static void soc_init_card_debugfs(struct snd_soc_card *card)
461 if (!snd_soc_debugfs_root)
464 card->debugfs_card_root = debugfs_create_dir(card->name,
465 snd_soc_debugfs_root);
466 if (!card->debugfs_card_root) {
468 "ASoC: Failed to create card debugfs directory\n");
472 card->debugfs_pop_time = debugfs_create_u32("dapm_pop_time", 0644,
473 card->debugfs_card_root,
475 if (!card->debugfs_pop_time)
477 "ASoC: Failed to create pop time debugfs file\n");
480 static void soc_cleanup_card_debugfs(struct snd_soc_card *card)
482 debugfs_remove_recursive(card->debugfs_card_root);
486 static void snd_soc_debugfs_init(void)
488 snd_soc_debugfs_root = debugfs_create_dir("asoc", NULL);
489 if (IS_ERR(snd_soc_debugfs_root) || !snd_soc_debugfs_root) {
490 pr_warn("ASoC: Failed to create debugfs directory\n");
491 snd_soc_debugfs_root = NULL;
495 if (!debugfs_create_file("codecs", 0444, snd_soc_debugfs_root, NULL,
497 pr_warn("ASoC: Failed to create CODEC list debugfs file\n");
499 if (!debugfs_create_file("dais", 0444, snd_soc_debugfs_root, NULL,
501 pr_warn("ASoC: Failed to create DAI list debugfs file\n");
503 if (!debugfs_create_file("platforms", 0444, snd_soc_debugfs_root, NULL,
504 &platform_list_fops))
505 pr_warn("ASoC: Failed to create platform list debugfs file\n");
508 static void snd_soc_debugfs_exit(void)
510 debugfs_remove_recursive(snd_soc_debugfs_root);
515 #define soc_init_codec_debugfs NULL
517 static inline void soc_init_component_debugfs(
518 struct snd_soc_component *component)
522 static inline void soc_cleanup_component_debugfs(
523 struct snd_soc_component *component)
527 static inline void soc_init_card_debugfs(struct snd_soc_card *card)
531 static inline void soc_cleanup_card_debugfs(struct snd_soc_card *card)
535 static inline void snd_soc_debugfs_init(void)
539 static inline void snd_soc_debugfs_exit(void)
545 struct snd_pcm_substream *snd_soc_get_dai_substream(struct snd_soc_card *card,
546 const char *dai_link, int stream)
550 for (i = 0; i < card->num_links; i++) {
551 if (card->rtd[i].dai_link->no_pcm &&
552 !strcmp(card->rtd[i].dai_link->name, dai_link))
553 return card->rtd[i].pcm->streams[stream].substream;
555 dev_dbg(card->dev, "ASoC: failed to find dai link %s\n", dai_link);
558 EXPORT_SYMBOL_GPL(snd_soc_get_dai_substream);
560 struct snd_soc_pcm_runtime *snd_soc_get_pcm_runtime(struct snd_soc_card *card,
561 const char *dai_link)
565 for (i = 0; i < card->num_links; i++) {
566 if (!strcmp(card->rtd[i].dai_link->name, dai_link))
567 return &card->rtd[i];
569 dev_dbg(card->dev, "ASoC: failed to find rtd %s\n", dai_link);
572 EXPORT_SYMBOL_GPL(snd_soc_get_pcm_runtime);
574 static void codec2codec_close_delayed_work(struct work_struct *work)
576 /* Currently nothing to do for c2c links
577 * Since c2c links are internal nodes in the DAPM graph and
578 * don't interface with the outside world or application layer
579 * we don't have to do any special handling on close.
583 #ifdef CONFIG_PM_SLEEP
584 /* powers down audio subsystem for suspend */
585 int snd_soc_suspend(struct device *dev)
587 struct snd_soc_card *card = dev_get_drvdata(dev);
588 struct snd_soc_codec *codec;
591 /* If the card is not initialized yet there is nothing to do */
592 if (!card->instantiated)
595 /* Due to the resume being scheduled into a workqueue we could
596 * suspend before that's finished - wait for it to complete.
598 snd_power_lock(card->snd_card);
599 snd_power_wait(card->snd_card, SNDRV_CTL_POWER_D0);
600 snd_power_unlock(card->snd_card);
602 /* we're going to block userspace touching us until resume completes */
603 snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D3hot);
605 /* mute any active DACs */
606 for (i = 0; i < card->num_rtd; i++) {
608 if (card->rtd[i].dai_link->ignore_suspend)
611 for (j = 0; j < card->rtd[i].num_codecs; j++) {
612 struct snd_soc_dai *dai = card->rtd[i].codec_dais[j];
613 struct snd_soc_dai_driver *drv = dai->driver;
615 if (drv->ops->digital_mute && dai->playback_active)
616 drv->ops->digital_mute(dai, 1);
620 /* suspend all pcms */
621 for (i = 0; i < card->num_rtd; i++) {
622 if (card->rtd[i].dai_link->ignore_suspend)
625 snd_pcm_suspend_all(card->rtd[i].pcm);
628 if (card->suspend_pre)
629 card->suspend_pre(card);
631 for (i = 0; i < card->num_rtd; i++) {
632 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
634 if (card->rtd[i].dai_link->ignore_suspend)
637 if (cpu_dai->driver->suspend && !cpu_dai->driver->bus_control)
638 cpu_dai->driver->suspend(cpu_dai);
641 /* close any waiting streams */
642 for (i = 0; i < card->num_rtd; i++)
643 flush_delayed_work(&card->rtd[i].delayed_work);
645 for (i = 0; i < card->num_rtd; i++) {
647 if (card->rtd[i].dai_link->ignore_suspend)
650 snd_soc_dapm_stream_event(&card->rtd[i],
651 SNDRV_PCM_STREAM_PLAYBACK,
652 SND_SOC_DAPM_STREAM_SUSPEND);
654 snd_soc_dapm_stream_event(&card->rtd[i],
655 SNDRV_PCM_STREAM_CAPTURE,
656 SND_SOC_DAPM_STREAM_SUSPEND);
659 /* Recheck all endpoints too, their state is affected by suspend */
660 dapm_mark_endpoints_dirty(card);
661 snd_soc_dapm_sync(&card->dapm);
663 /* suspend all CODECs */
664 list_for_each_entry(codec, &card->codec_dev_list, card_list) {
665 /* If there are paths active then the CODEC will be held with
666 * bias _ON and should not be suspended. */
667 if (!codec->suspended) {
668 switch (codec->dapm.bias_level) {
669 case SND_SOC_BIAS_STANDBY:
671 * If the CODEC is capable of idle
672 * bias off then being in STANDBY
673 * means it's doing something,
674 * otherwise fall through.
676 if (codec->dapm.idle_bias_off) {
678 "ASoC: idle_bias_off CODEC on over suspend\n");
682 case SND_SOC_BIAS_OFF:
683 if (codec->driver->suspend)
684 codec->driver->suspend(codec);
685 codec->suspended = 1;
686 if (codec->component.regmap)
687 regcache_mark_dirty(codec->component.regmap);
688 /* deactivate pins to sleep state */
689 pinctrl_pm_select_sleep_state(codec->dev);
693 "ASoC: CODEC is on over suspend\n");
699 for (i = 0; i < card->num_rtd; i++) {
700 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
702 if (card->rtd[i].dai_link->ignore_suspend)
705 if (cpu_dai->driver->suspend && cpu_dai->driver->bus_control)
706 cpu_dai->driver->suspend(cpu_dai);
708 /* deactivate pins to sleep state */
709 pinctrl_pm_select_sleep_state(cpu_dai->dev);
712 if (card->suspend_post)
713 card->suspend_post(card);
717 EXPORT_SYMBOL_GPL(snd_soc_suspend);
719 /* deferred resume work, so resume can complete before we finished
720 * setting our codec back up, which can be very slow on I2C
722 static void soc_resume_deferred(struct work_struct *work)
724 struct snd_soc_card *card =
725 container_of(work, struct snd_soc_card, deferred_resume_work);
726 struct snd_soc_codec *codec;
729 /* our power state is still SNDRV_CTL_POWER_D3hot from suspend time,
730 * so userspace apps are blocked from touching us
733 dev_dbg(card->dev, "ASoC: starting resume work\n");
735 /* Bring us up into D2 so that DAPM starts enabling things */
736 snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D2);
738 if (card->resume_pre)
739 card->resume_pre(card);
741 /* resume control bus DAIs */
742 for (i = 0; i < card->num_rtd; i++) {
743 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
745 if (card->rtd[i].dai_link->ignore_suspend)
748 if (cpu_dai->driver->resume && cpu_dai->driver->bus_control)
749 cpu_dai->driver->resume(cpu_dai);
752 list_for_each_entry(codec, &card->codec_dev_list, card_list) {
753 /* If the CODEC was idle over suspend then it will have been
754 * left with bias OFF or STANDBY and suspended so we must now
755 * resume. Otherwise the suspend was suppressed.
757 if (codec->suspended) {
758 switch (codec->dapm.bias_level) {
759 case SND_SOC_BIAS_STANDBY:
760 case SND_SOC_BIAS_OFF:
761 if (codec->driver->resume)
762 codec->driver->resume(codec);
763 codec->suspended = 0;
767 "ASoC: CODEC was on over suspend\n");
773 for (i = 0; i < card->num_rtd; i++) {
775 if (card->rtd[i].dai_link->ignore_suspend)
778 snd_soc_dapm_stream_event(&card->rtd[i],
779 SNDRV_PCM_STREAM_PLAYBACK,
780 SND_SOC_DAPM_STREAM_RESUME);
782 snd_soc_dapm_stream_event(&card->rtd[i],
783 SNDRV_PCM_STREAM_CAPTURE,
784 SND_SOC_DAPM_STREAM_RESUME);
787 /* unmute any active DACs */
788 for (i = 0; i < card->num_rtd; i++) {
790 if (card->rtd[i].dai_link->ignore_suspend)
793 for (j = 0; j < card->rtd[i].num_codecs; j++) {
794 struct snd_soc_dai *dai = card->rtd[i].codec_dais[j];
795 struct snd_soc_dai_driver *drv = dai->driver;
797 if (drv->ops->digital_mute && dai->playback_active)
798 drv->ops->digital_mute(dai, 0);
802 for (i = 0; i < card->num_rtd; i++) {
803 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
805 if (card->rtd[i].dai_link->ignore_suspend)
808 if (cpu_dai->driver->resume && !cpu_dai->driver->bus_control)
809 cpu_dai->driver->resume(cpu_dai);
812 if (card->resume_post)
813 card->resume_post(card);
815 dev_dbg(card->dev, "ASoC: resume work completed\n");
817 /* userspace can access us now we are back as we were before */
818 snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D0);
820 /* Recheck all endpoints too, their state is affected by suspend */
821 dapm_mark_endpoints_dirty(card);
822 snd_soc_dapm_sync(&card->dapm);
825 /* powers up audio subsystem after a suspend */
826 int snd_soc_resume(struct device *dev)
828 struct snd_soc_card *card = dev_get_drvdata(dev);
829 bool bus_control = false;
832 /* If the card is not initialized yet there is nothing to do */
833 if (!card->instantiated)
836 /* activate pins from sleep state */
837 for (i = 0; i < card->num_rtd; i++) {
838 struct snd_soc_pcm_runtime *rtd = &card->rtd[i];
839 struct snd_soc_dai **codec_dais = rtd->codec_dais;
840 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
844 pinctrl_pm_select_default_state(cpu_dai->dev);
846 for (j = 0; j < rtd->num_codecs; j++) {
847 struct snd_soc_dai *codec_dai = codec_dais[j];
848 if (codec_dai->active)
849 pinctrl_pm_select_default_state(codec_dai->dev);
854 * DAIs that also act as the control bus master might have other drivers
855 * hanging off them so need to resume immediately. Other drivers don't
856 * have that problem and may take a substantial amount of time to resume
857 * due to I/O costs and anti-pop so handle them out of line.
859 for (i = 0; i < card->num_rtd; i++) {
860 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
861 bus_control |= cpu_dai->driver->bus_control;
864 dev_dbg(dev, "ASoC: Resuming control bus master immediately\n");
865 soc_resume_deferred(&card->deferred_resume_work);
867 dev_dbg(dev, "ASoC: Scheduling resume work\n");
868 if (!schedule_work(&card->deferred_resume_work))
869 dev_err(dev, "ASoC: resume work item may be lost\n");
874 EXPORT_SYMBOL_GPL(snd_soc_resume);
876 #define snd_soc_suspend NULL
877 #define snd_soc_resume NULL
880 static const struct snd_soc_dai_ops null_dai_ops = {
883 static struct snd_soc_component *soc_find_component(
884 const struct device_node *of_node, const char *name)
886 struct snd_soc_component *component;
888 lockdep_assert_held(&client_mutex);
890 list_for_each_entry(component, &component_list, list) {
892 if (component->dev->of_node == of_node)
894 } else if (strcmp(component->name, name) == 0) {
902 static struct snd_soc_dai *snd_soc_find_dai(
903 const struct snd_soc_dai_link_component *dlc)
905 struct snd_soc_component *component;
906 struct snd_soc_dai *dai;
908 lockdep_assert_held(&client_mutex);
910 /* Find CPU DAI from registered DAIs*/
911 list_for_each_entry(component, &component_list, list) {
912 if (dlc->of_node && component->dev->of_node != dlc->of_node)
914 if (dlc->name && strcmp(component->name, dlc->name))
916 list_for_each_entry(dai, &component->dai_list, list) {
917 if (dlc->dai_name && strcmp(dai->name, dlc->dai_name))
927 static int soc_bind_dai_link(struct snd_soc_card *card, int num)
929 struct snd_soc_dai_link *dai_link = &card->dai_link[num];
930 struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
931 struct snd_soc_dai_link_component *codecs = dai_link->codecs;
932 struct snd_soc_dai_link_component cpu_dai_component;
933 struct snd_soc_dai **codec_dais = rtd->codec_dais;
934 struct snd_soc_platform *platform;
935 const char *platform_name;
938 dev_dbg(card->dev, "ASoC: binding %s at idx %d\n", dai_link->name, num);
940 cpu_dai_component.name = dai_link->cpu_name;
941 cpu_dai_component.of_node = dai_link->cpu_of_node;
942 cpu_dai_component.dai_name = dai_link->cpu_dai_name;
943 rtd->cpu_dai = snd_soc_find_dai(&cpu_dai_component);
945 dev_err(card->dev, "ASoC: CPU DAI %s not registered\n",
946 dai_link->cpu_dai_name);
947 return -EPROBE_DEFER;
950 rtd->num_codecs = dai_link->num_codecs;
952 /* Find CODEC from registered CODECs */
953 for (i = 0; i < rtd->num_codecs; i++) {
954 codec_dais[i] = snd_soc_find_dai(&codecs[i]);
955 if (!codec_dais[i]) {
956 dev_err(card->dev, "ASoC: CODEC DAI %s not registered\n",
958 return -EPROBE_DEFER;
962 /* Single codec links expect codec and codec_dai in runtime data */
963 rtd->codec_dai = codec_dais[0];
964 rtd->codec = rtd->codec_dai->codec;
966 /* if there's no platform we match on the empty platform */
967 platform_name = dai_link->platform_name;
968 if (!platform_name && !dai_link->platform_of_node)
969 platform_name = "snd-soc-dummy";
971 /* find one from the set of registered platforms */
972 list_for_each_entry(platform, &platform_list, list) {
973 if (dai_link->platform_of_node) {
974 if (platform->dev->of_node !=
975 dai_link->platform_of_node)
978 if (strcmp(platform->component.name, platform_name))
982 rtd->platform = platform;
984 if (!rtd->platform) {
985 dev_err(card->dev, "ASoC: platform %s not registered\n",
986 dai_link->platform_name);
987 return -EPROBE_DEFER;
995 static void soc_remove_component(struct snd_soc_component *component)
997 if (!component->probed)
1000 /* This is a HACK and will be removed soon */
1001 if (component->codec)
1002 list_del(&component->codec->card_list);
1004 if (component->remove)
1005 component->remove(component);
1007 snd_soc_dapm_free(snd_soc_component_get_dapm(component));
1009 soc_cleanup_component_debugfs(component);
1010 component->probed = 0;
1011 module_put(component->dev->driver->owner);
1014 static void soc_remove_dai(struct snd_soc_dai *dai, int order)
1018 if (dai && dai->probed &&
1019 dai->driver->remove_order == order) {
1020 if (dai->driver->remove) {
1021 err = dai->driver->remove(dai);
1024 "ASoC: failed to remove %s: %d\n",
1031 static void soc_remove_link_dais(struct snd_soc_card *card, int num, int order)
1033 struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
1036 /* unregister the rtd device */
1037 if (rtd->dev_registered) {
1038 device_unregister(rtd->dev);
1039 rtd->dev_registered = 0;
1042 /* remove the CODEC DAI */
1043 for (i = 0; i < rtd->num_codecs; i++)
1044 soc_remove_dai(rtd->codec_dais[i], order);
1046 soc_remove_dai(rtd->cpu_dai, order);
1049 static void soc_remove_link_components(struct snd_soc_card *card, int num,
1052 struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
1053 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1054 struct snd_soc_platform *platform = rtd->platform;
1055 struct snd_soc_component *component;
1058 /* remove the platform */
1059 if (platform && platform->component.driver->remove_order == order)
1060 soc_remove_component(&platform->component);
1062 /* remove the CODEC-side CODEC */
1063 for (i = 0; i < rtd->num_codecs; i++) {
1064 component = rtd->codec_dais[i]->component;
1065 if (component->driver->remove_order == order)
1066 soc_remove_component(component);
1069 /* remove any CPU-side CODEC */
1071 if (cpu_dai->component->driver->remove_order == order)
1072 soc_remove_component(cpu_dai->component);
1076 static void soc_remove_dai_links(struct snd_soc_card *card)
1080 for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST;
1082 for (dai = 0; dai < card->num_rtd; dai++)
1083 soc_remove_link_dais(card, dai, order);
1086 for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST;
1088 for (dai = 0; dai < card->num_rtd; dai++)
1089 soc_remove_link_components(card, dai, order);
1095 static void soc_set_name_prefix(struct snd_soc_card *card,
1096 struct snd_soc_component *component)
1100 if (card->codec_conf == NULL)
1103 for (i = 0; i < card->num_configs; i++) {
1104 struct snd_soc_codec_conf *map = &card->codec_conf[i];
1105 if (map->of_node && component->dev->of_node != map->of_node)
1107 if (map->dev_name && strcmp(component->name, map->dev_name))
1109 component->name_prefix = map->name_prefix;
1114 static int soc_probe_component(struct snd_soc_card *card,
1115 struct snd_soc_component *component)
1117 struct snd_soc_dapm_context *dapm = snd_soc_component_get_dapm(component);
1118 struct snd_soc_dai *dai;
1121 if (component->probed)
1124 component->card = card;
1126 soc_set_name_prefix(card, component);
1128 if (!try_module_get(component->dev->driver->owner))
1131 soc_init_component_debugfs(component);
1133 if (component->dapm_widgets) {
1134 ret = snd_soc_dapm_new_controls(dapm, component->dapm_widgets,
1135 component->num_dapm_widgets);
1138 dev_err(component->dev,
1139 "Failed to create new controls %d\n", ret);
1144 list_for_each_entry(dai, &component->dai_list, list) {
1145 ret = snd_soc_dapm_new_dai_widgets(dapm, dai);
1147 dev_err(component->dev,
1148 "Failed to create DAI widgets %d\n", ret);
1153 if (component->probe) {
1154 ret = component->probe(component);
1156 dev_err(component->dev,
1157 "ASoC: failed to probe component %d\n", ret);
1161 WARN(dapm->idle_bias_off &&
1162 dapm->bias_level != SND_SOC_BIAS_OFF,
1163 "codec %s can not start from non-off bias with idle_bias_off==1\n",
1167 if (component->controls)
1168 snd_soc_add_component_controls(component, component->controls,
1169 component->num_controls);
1170 if (component->dapm_routes)
1171 snd_soc_dapm_add_routes(dapm, component->dapm_routes,
1172 component->num_dapm_routes);
1174 component->probed = 1;
1175 list_add(&dapm->list, &card->dapm_list);
1177 /* This is a HACK and will be removed soon */
1178 if (component->codec)
1179 list_add(&component->codec->card_list, &card->codec_dev_list);
1184 soc_cleanup_component_debugfs(component);
1185 module_put(component->dev->driver->owner);
1190 static void rtd_release(struct device *dev)
1195 static int soc_post_component_init(struct snd_soc_pcm_runtime *rtd,
1200 /* register the rtd device */
1201 rtd->dev = kzalloc(sizeof(struct device), GFP_KERNEL);
1204 device_initialize(rtd->dev);
1205 rtd->dev->parent = rtd->card->dev;
1206 rtd->dev->release = rtd_release;
1207 rtd->dev->groups = soc_dev_attr_groups;
1208 dev_set_name(rtd->dev, "%s", name);
1209 dev_set_drvdata(rtd->dev, rtd);
1210 mutex_init(&rtd->pcm_mutex);
1211 INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_PLAYBACK].be_clients);
1212 INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_CAPTURE].be_clients);
1213 INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_PLAYBACK].fe_clients);
1214 INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_CAPTURE].fe_clients);
1215 ret = device_add(rtd->dev);
1217 /* calling put_device() here to free the rtd->dev */
1218 put_device(rtd->dev);
1219 dev_err(rtd->card->dev,
1220 "ASoC: failed to register runtime device: %d\n", ret);
1223 rtd->dev_registered = 1;
1227 static int soc_probe_link_components(struct snd_soc_card *card, int num,
1230 struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
1231 struct snd_soc_platform *platform = rtd->platform;
1232 struct snd_soc_component *component;
1235 /* probe the CPU-side component, if it is a CODEC */
1236 component = rtd->cpu_dai->component;
1237 if (component->driver->probe_order == order) {
1238 ret = soc_probe_component(card, component);
1243 /* probe the CODEC-side components */
1244 for (i = 0; i < rtd->num_codecs; i++) {
1245 component = rtd->codec_dais[i]->component;
1246 if (component->driver->probe_order == order) {
1247 ret = soc_probe_component(card, component);
1253 /* probe the platform */
1254 if (platform->component.driver->probe_order == order) {
1255 ret = soc_probe_component(card, &platform->component);
1263 static int soc_probe_dai(struct snd_soc_dai *dai, int order)
1267 if (!dai->probed && dai->driver->probe_order == order) {
1268 if (dai->driver->probe) {
1269 ret = dai->driver->probe(dai);
1272 "ASoC: failed to probe DAI %s: %d\n",
1284 static int soc_link_dai_widgets(struct snd_soc_card *card,
1285 struct snd_soc_dai_link *dai_link,
1286 struct snd_soc_pcm_runtime *rtd)
1288 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1289 struct snd_soc_dai *codec_dai = rtd->codec_dai;
1290 struct snd_soc_dapm_widget *play_w, *capture_w;
1293 if (rtd->num_codecs > 1)
1294 dev_warn(card->dev, "ASoC: Multiple codecs not supported yet\n");
1296 /* link the DAI widgets */
1297 play_w = codec_dai->playback_widget;
1298 capture_w = cpu_dai->capture_widget;
1299 if (play_w && capture_w) {
1300 ret = snd_soc_dapm_new_pcm(card, dai_link->params,
1303 dev_err(card->dev, "ASoC: Can't link %s to %s: %d\n",
1304 play_w->name, capture_w->name, ret);
1309 play_w = cpu_dai->playback_widget;
1310 capture_w = codec_dai->capture_widget;
1311 if (play_w && capture_w) {
1312 ret = snd_soc_dapm_new_pcm(card, dai_link->params,
1315 dev_err(card->dev, "ASoC: Can't link %s to %s: %d\n",
1316 play_w->name, capture_w->name, ret);
1324 static int soc_probe_link_dais(struct snd_soc_card *card, int num, int order)
1326 struct snd_soc_dai_link *dai_link = &card->dai_link[num];
1327 struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
1328 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1331 dev_dbg(card->dev, "ASoC: probe %s dai link %d late %d\n",
1332 card->name, num, order);
1334 /* set default power off timeout */
1335 rtd->pmdown_time = pmdown_time;
1337 ret = soc_probe_dai(cpu_dai, order);
1341 /* probe the CODEC DAI */
1342 for (i = 0; i < rtd->num_codecs; i++) {
1343 ret = soc_probe_dai(rtd->codec_dais[i], order);
1348 /* complete DAI probe during last probe */
1349 if (order != SND_SOC_COMP_ORDER_LAST)
1352 /* do machine specific initialization */
1353 if (dai_link->init) {
1354 ret = dai_link->init(rtd);
1356 dev_err(card->dev, "ASoC: failed to init %s: %d\n",
1357 dai_link->name, ret);
1362 ret = soc_post_component_init(rtd, dai_link->name);
1366 #ifdef CONFIG_DEBUG_FS
1367 /* add DPCM sysfs entries */
1368 if (dai_link->dynamic)
1369 soc_dpcm_debugfs_add(rtd);
1372 if (cpu_dai->driver->compress_dai) {
1373 /*create compress_device"*/
1374 ret = soc_new_compress(rtd, num);
1376 dev_err(card->dev, "ASoC: can't create compress %s\n",
1377 dai_link->stream_name);
1382 if (!dai_link->params) {
1383 /* create the pcm */
1384 ret = soc_new_pcm(rtd, num);
1386 dev_err(card->dev, "ASoC: can't create pcm %s :%d\n",
1387 dai_link->stream_name, ret);
1391 INIT_DELAYED_WORK(&rtd->delayed_work,
1392 codec2codec_close_delayed_work);
1394 /* link the DAI widgets */
1395 ret = soc_link_dai_widgets(card, dai_link, rtd);
1404 static int soc_bind_aux_dev(struct snd_soc_card *card, int num)
1406 struct snd_soc_pcm_runtime *rtd = &card->rtd_aux[num];
1407 struct snd_soc_aux_dev *aux_dev = &card->aux_dev[num];
1408 const char *name = aux_dev->codec_name;
1410 rtd->component = soc_find_component(aux_dev->codec_of_node, name);
1411 if (!rtd->component) {
1412 if (aux_dev->codec_of_node)
1413 name = of_node_full_name(aux_dev->codec_of_node);
1415 dev_err(card->dev, "ASoC: %s not registered\n", name);
1416 return -EPROBE_DEFER;
1420 * Some places still reference rtd->codec, so we have to keep that
1421 * initialized if the component is a CODEC. Once all those references
1422 * have been removed, this code can be removed as well.
1424 rtd->codec = rtd->component->codec;
1429 static int soc_probe_aux_dev(struct snd_soc_card *card, int num)
1431 struct snd_soc_pcm_runtime *rtd = &card->rtd_aux[num];
1432 struct snd_soc_aux_dev *aux_dev = &card->aux_dev[num];
1435 ret = soc_probe_component(card, rtd->component);
1439 /* do machine specific initialization */
1440 if (aux_dev->init) {
1441 ret = aux_dev->init(rtd->component);
1443 dev_err(card->dev, "ASoC: failed to init %s: %d\n",
1444 aux_dev->name, ret);
1449 return soc_post_component_init(rtd, aux_dev->name);
1452 static void soc_remove_aux_dev(struct snd_soc_card *card, int num)
1454 struct snd_soc_pcm_runtime *rtd = &card->rtd_aux[num];
1455 struct snd_soc_component *component = rtd->component;
1457 /* unregister the rtd device */
1458 if (rtd->dev_registered) {
1459 device_unregister(rtd->dev);
1460 rtd->dev_registered = 0;
1463 if (component && component->probed)
1464 soc_remove_component(component);
1467 static int snd_soc_init_codec_cache(struct snd_soc_codec *codec)
1471 if (codec->cache_init)
1474 ret = snd_soc_cache_init(codec);
1477 "ASoC: Failed to set cache compression type: %d\n",
1481 codec->cache_init = 1;
1486 * snd_soc_runtime_set_dai_fmt() - Change DAI link format for a ASoC runtime
1487 * @rtd: The runtime for which the DAI link format should be changed
1488 * @dai_fmt: The new DAI link format
1490 * This function updates the DAI link format for all DAIs connected to the DAI
1491 * link for the specified runtime.
1493 * Note: For setups with a static format set the dai_fmt field in the
1494 * corresponding snd_dai_link struct instead of using this function.
1496 * Returns 0 on success, otherwise a negative error code.
1498 int snd_soc_runtime_set_dai_fmt(struct snd_soc_pcm_runtime *rtd,
1499 unsigned int dai_fmt)
1501 struct snd_soc_dai **codec_dais = rtd->codec_dais;
1502 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1506 for (i = 0; i < rtd->num_codecs; i++) {
1507 struct snd_soc_dai *codec_dai = codec_dais[i];
1509 ret = snd_soc_dai_set_fmt(codec_dai, dai_fmt);
1510 if (ret != 0 && ret != -ENOTSUPP) {
1511 dev_warn(codec_dai->dev,
1512 "ASoC: Failed to set DAI format: %d\n", ret);
1517 /* Flip the polarity for the "CPU" end of a CODEC<->CODEC link */
1518 if (cpu_dai->codec) {
1519 unsigned int inv_dai_fmt;
1521 inv_dai_fmt = dai_fmt & ~SND_SOC_DAIFMT_MASTER_MASK;
1522 switch (dai_fmt & SND_SOC_DAIFMT_MASTER_MASK) {
1523 case SND_SOC_DAIFMT_CBM_CFM:
1524 inv_dai_fmt |= SND_SOC_DAIFMT_CBS_CFS;
1526 case SND_SOC_DAIFMT_CBM_CFS:
1527 inv_dai_fmt |= SND_SOC_DAIFMT_CBS_CFM;
1529 case SND_SOC_DAIFMT_CBS_CFM:
1530 inv_dai_fmt |= SND_SOC_DAIFMT_CBM_CFS;
1532 case SND_SOC_DAIFMT_CBS_CFS:
1533 inv_dai_fmt |= SND_SOC_DAIFMT_CBM_CFM;
1537 dai_fmt = inv_dai_fmt;
1540 ret = snd_soc_dai_set_fmt(cpu_dai, dai_fmt);
1541 if (ret != 0 && ret != -ENOTSUPP) {
1542 dev_warn(cpu_dai->dev,
1543 "ASoC: Failed to set DAI format: %d\n", ret);
1549 EXPORT_SYMBOL_GPL(snd_soc_runtime_set_dai_fmt);
1551 static int snd_soc_instantiate_card(struct snd_soc_card *card)
1553 struct snd_soc_codec *codec;
1556 mutex_lock(&client_mutex);
1557 mutex_lock_nested(&card->mutex, SND_SOC_CARD_CLASS_INIT);
1560 for (i = 0; i < card->num_links; i++) {
1561 ret = soc_bind_dai_link(card, i);
1566 /* bind aux_devs too */
1567 for (i = 0; i < card->num_aux_devs; i++) {
1568 ret = soc_bind_aux_dev(card, i);
1573 /* initialize the register cache for each available codec */
1574 list_for_each_entry(codec, &codec_list, list) {
1575 if (codec->cache_init)
1577 ret = snd_soc_init_codec_cache(codec);
1582 /* card bind complete so register a sound card */
1583 ret = snd_card_new(card->dev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1,
1584 card->owner, 0, &card->snd_card);
1587 "ASoC: can't create sound card for card %s: %d\n",
1592 soc_init_card_debugfs(card);
1594 card->dapm.bias_level = SND_SOC_BIAS_OFF;
1595 card->dapm.dev = card->dev;
1596 card->dapm.card = card;
1597 list_add(&card->dapm.list, &card->dapm_list);
1599 #ifdef CONFIG_DEBUG_FS
1600 snd_soc_dapm_debugfs_init(&card->dapm, card->debugfs_card_root);
1603 #ifdef CONFIG_PM_SLEEP
1604 /* deferred resume work */
1605 INIT_WORK(&card->deferred_resume_work, soc_resume_deferred);
1608 if (card->dapm_widgets)
1609 snd_soc_dapm_new_controls(&card->dapm, card->dapm_widgets,
1610 card->num_dapm_widgets);
1612 /* initialise the sound card only once */
1614 ret = card->probe(card);
1616 goto card_probe_error;
1619 /* probe all components used by DAI links on this card */
1620 for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST;
1622 for (i = 0; i < card->num_links; i++) {
1623 ret = soc_probe_link_components(card, i, order);
1626 "ASoC: failed to instantiate card %d\n",
1633 /* probe all DAI links on this card */
1634 for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST;
1636 for (i = 0; i < card->num_links; i++) {
1637 ret = soc_probe_link_dais(card, i, order);
1640 "ASoC: failed to instantiate card %d\n",
1647 for (i = 0; i < card->num_aux_devs; i++) {
1648 ret = soc_probe_aux_dev(card, i);
1651 "ASoC: failed to add auxiliary devices %d\n",
1653 goto probe_aux_dev_err;
1657 snd_soc_dapm_link_dai_widgets(card);
1658 snd_soc_dapm_connect_dai_link_widgets(card);
1661 snd_soc_add_card_controls(card, card->controls, card->num_controls);
1663 if (card->dapm_routes)
1664 snd_soc_dapm_add_routes(&card->dapm, card->dapm_routes,
1665 card->num_dapm_routes);
1667 for (i = 0; i < card->num_links; i++) {
1668 if (card->dai_link[i].dai_fmt)
1669 snd_soc_runtime_set_dai_fmt(&card->rtd[i],
1670 card->dai_link[i].dai_fmt);
1673 snprintf(card->snd_card->shortname, sizeof(card->snd_card->shortname),
1675 snprintf(card->snd_card->longname, sizeof(card->snd_card->longname),
1676 "%s", card->long_name ? card->long_name : card->name);
1677 snprintf(card->snd_card->driver, sizeof(card->snd_card->driver),
1678 "%s", card->driver_name ? card->driver_name : card->name);
1679 for (i = 0; i < ARRAY_SIZE(card->snd_card->driver); i++) {
1680 switch (card->snd_card->driver[i]) {
1686 if (!isalnum(card->snd_card->driver[i]))
1687 card->snd_card->driver[i] = '_';
1692 if (card->late_probe) {
1693 ret = card->late_probe(card);
1695 dev_err(card->dev, "ASoC: %s late_probe() failed: %d\n",
1697 goto probe_aux_dev_err;
1701 snd_soc_dapm_new_widgets(card);
1703 ret = snd_card_register(card->snd_card);
1705 dev_err(card->dev, "ASoC: failed to register soundcard %d\n",
1707 goto probe_aux_dev_err;
1710 card->instantiated = 1;
1711 snd_soc_dapm_sync(&card->dapm);
1712 mutex_unlock(&card->mutex);
1713 mutex_unlock(&client_mutex);
1718 for (i = 0; i < card->num_aux_devs; i++)
1719 soc_remove_aux_dev(card, i);
1722 soc_remove_dai_links(card);
1728 soc_cleanup_card_debugfs(card);
1729 snd_card_free(card->snd_card);
1732 mutex_unlock(&card->mutex);
1733 mutex_unlock(&client_mutex);
1738 /* probes a new socdev */
1739 static int soc_probe(struct platform_device *pdev)
1741 struct snd_soc_card *card = platform_get_drvdata(pdev);
1744 * no card, so machine driver should be registering card
1745 * we should not be here in that case so ret error
1750 dev_warn(&pdev->dev,
1751 "ASoC: machine %s should use snd_soc_register_card()\n",
1754 /* Bodge while we unpick instantiation */
1755 card->dev = &pdev->dev;
1757 return snd_soc_register_card(card);
1760 static int soc_cleanup_card_resources(struct snd_soc_card *card)
1764 /* make sure any delayed work runs */
1765 for (i = 0; i < card->num_rtd; i++) {
1766 struct snd_soc_pcm_runtime *rtd = &card->rtd[i];
1767 flush_delayed_work(&rtd->delayed_work);
1770 /* remove auxiliary devices */
1771 for (i = 0; i < card->num_aux_devs; i++)
1772 soc_remove_aux_dev(card, i);
1774 /* remove and free each DAI */
1775 soc_remove_dai_links(card);
1777 soc_cleanup_card_debugfs(card);
1779 /* remove the card */
1783 snd_soc_dapm_free(&card->dapm);
1785 snd_card_free(card->snd_card);
1790 /* removes a socdev */
1791 static int soc_remove(struct platform_device *pdev)
1793 struct snd_soc_card *card = platform_get_drvdata(pdev);
1795 snd_soc_unregister_card(card);
1799 int snd_soc_poweroff(struct device *dev)
1801 struct snd_soc_card *card = dev_get_drvdata(dev);
1804 if (!card->instantiated)
1807 /* Flush out pmdown_time work - we actually do want to run it
1808 * now, we're shutting down so no imminent restart. */
1809 for (i = 0; i < card->num_rtd; i++) {
1810 struct snd_soc_pcm_runtime *rtd = &card->rtd[i];
1811 flush_delayed_work(&rtd->delayed_work);
1814 snd_soc_dapm_shutdown(card);
1816 /* deactivate pins to sleep state */
1817 for (i = 0; i < card->num_rtd; i++) {
1818 struct snd_soc_pcm_runtime *rtd = &card->rtd[i];
1819 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1822 pinctrl_pm_select_sleep_state(cpu_dai->dev);
1823 for (j = 0; j < rtd->num_codecs; j++) {
1824 struct snd_soc_dai *codec_dai = rtd->codec_dais[j];
1825 pinctrl_pm_select_sleep_state(codec_dai->dev);
1831 EXPORT_SYMBOL_GPL(snd_soc_poweroff);
1833 const struct dev_pm_ops snd_soc_pm_ops = {
1834 .suspend = snd_soc_suspend,
1835 .resume = snd_soc_resume,
1836 .freeze = snd_soc_suspend,
1837 .thaw = snd_soc_resume,
1838 .poweroff = snd_soc_poweroff,
1839 .restore = snd_soc_resume,
1841 EXPORT_SYMBOL_GPL(snd_soc_pm_ops);
1843 /* ASoC platform driver */
1844 static struct platform_driver soc_driver = {
1846 .name = "soc-audio",
1847 .pm = &snd_soc_pm_ops,
1850 .remove = soc_remove,
1854 * snd_soc_cnew - create new control
1855 * @_template: control template
1856 * @data: control private data
1857 * @long_name: control long name
1858 * @prefix: control name prefix
1860 * Create a new mixer control from a template control.
1862 * Returns 0 for success, else error.
1864 struct snd_kcontrol *snd_soc_cnew(const struct snd_kcontrol_new *_template,
1865 void *data, const char *long_name,
1868 struct snd_kcontrol_new template;
1869 struct snd_kcontrol *kcontrol;
1872 memcpy(&template, _template, sizeof(template));
1876 long_name = template.name;
1879 name = kasprintf(GFP_KERNEL, "%s %s", prefix, long_name);
1883 template.name = name;
1885 template.name = long_name;
1888 kcontrol = snd_ctl_new1(&template, data);
1894 EXPORT_SYMBOL_GPL(snd_soc_cnew);
1896 static int snd_soc_add_controls(struct snd_card *card, struct device *dev,
1897 const struct snd_kcontrol_new *controls, int num_controls,
1898 const char *prefix, void *data)
1902 for (i = 0; i < num_controls; i++) {
1903 const struct snd_kcontrol_new *control = &controls[i];
1904 err = snd_ctl_add(card, snd_soc_cnew(control, data,
1905 control->name, prefix));
1907 dev_err(dev, "ASoC: Failed to add %s: %d\n",
1908 control->name, err);
1916 struct snd_kcontrol *snd_soc_card_get_kcontrol(struct snd_soc_card *soc_card,
1919 struct snd_card *card = soc_card->snd_card;
1920 struct snd_kcontrol *kctl;
1922 if (unlikely(!name))
1925 list_for_each_entry(kctl, &card->controls, list)
1926 if (!strncmp(kctl->id.name, name, sizeof(kctl->id.name)))
1930 EXPORT_SYMBOL_GPL(snd_soc_card_get_kcontrol);
1933 * snd_soc_add_component_controls - Add an array of controls to a component.
1935 * @component: Component to add controls to
1936 * @controls: Array of controls to add
1937 * @num_controls: Number of elements in the array
1939 * Return: 0 for success, else error.
1941 int snd_soc_add_component_controls(struct snd_soc_component *component,
1942 const struct snd_kcontrol_new *controls, unsigned int num_controls)
1944 struct snd_card *card = component->card->snd_card;
1946 return snd_soc_add_controls(card, component->dev, controls,
1947 num_controls, component->name_prefix, component);
1949 EXPORT_SYMBOL_GPL(snd_soc_add_component_controls);
1952 * snd_soc_add_codec_controls - add an array of controls to a codec.
1953 * Convenience function to add a list of controls. Many codecs were
1954 * duplicating this code.
1956 * @codec: codec to add controls to
1957 * @controls: array of controls to add
1958 * @num_controls: number of elements in the array
1960 * Return 0 for success, else error.
1962 int snd_soc_add_codec_controls(struct snd_soc_codec *codec,
1963 const struct snd_kcontrol_new *controls, unsigned int num_controls)
1965 return snd_soc_add_component_controls(&codec->component, controls,
1968 EXPORT_SYMBOL_GPL(snd_soc_add_codec_controls);
1971 * snd_soc_add_platform_controls - add an array of controls to a platform.
1972 * Convenience function to add a list of controls.
1974 * @platform: platform to add controls to
1975 * @controls: array of controls to add
1976 * @num_controls: number of elements in the array
1978 * Return 0 for success, else error.
1980 int snd_soc_add_platform_controls(struct snd_soc_platform *platform,
1981 const struct snd_kcontrol_new *controls, unsigned int num_controls)
1983 return snd_soc_add_component_controls(&platform->component, controls,
1986 EXPORT_SYMBOL_GPL(snd_soc_add_platform_controls);
1989 * snd_soc_add_card_controls - add an array of controls to a SoC card.
1990 * Convenience function to add a list of controls.
1992 * @soc_card: SoC card to add controls to
1993 * @controls: array of controls to add
1994 * @num_controls: number of elements in the array
1996 * Return 0 for success, else error.
1998 int snd_soc_add_card_controls(struct snd_soc_card *soc_card,
1999 const struct snd_kcontrol_new *controls, int num_controls)
2001 struct snd_card *card = soc_card->snd_card;
2003 return snd_soc_add_controls(card, soc_card->dev, controls, num_controls,
2006 EXPORT_SYMBOL_GPL(snd_soc_add_card_controls);
2009 * snd_soc_add_dai_controls - add an array of controls to a DAI.
2010 * Convienience function to add a list of controls.
2012 * @dai: DAI to add controls to
2013 * @controls: array of controls to add
2014 * @num_controls: number of elements in the array
2016 * Return 0 for success, else error.
2018 int snd_soc_add_dai_controls(struct snd_soc_dai *dai,
2019 const struct snd_kcontrol_new *controls, int num_controls)
2021 struct snd_card *card = dai->component->card->snd_card;
2023 return snd_soc_add_controls(card, dai->dev, controls, num_controls,
2026 EXPORT_SYMBOL_GPL(snd_soc_add_dai_controls);
2029 * snd_soc_dai_set_sysclk - configure DAI system or master clock.
2031 * @clk_id: DAI specific clock ID
2032 * @freq: new clock frequency in Hz
2033 * @dir: new clock direction - input/output.
2035 * Configures the DAI master (MCLK) or system (SYSCLK) clocking.
2037 int snd_soc_dai_set_sysclk(struct snd_soc_dai *dai, int clk_id,
2038 unsigned int freq, int dir)
2040 if (dai->driver && dai->driver->ops->set_sysclk)
2041 return dai->driver->ops->set_sysclk(dai, clk_id, freq, dir);
2042 else if (dai->codec && dai->codec->driver->set_sysclk)
2043 return dai->codec->driver->set_sysclk(dai->codec, clk_id, 0,
2048 EXPORT_SYMBOL_GPL(snd_soc_dai_set_sysclk);
2051 * snd_soc_codec_set_sysclk - configure CODEC system or master clock.
2053 * @clk_id: DAI specific clock ID
2054 * @source: Source for the clock
2055 * @freq: new clock frequency in Hz
2056 * @dir: new clock direction - input/output.
2058 * Configures the CODEC master (MCLK) or system (SYSCLK) clocking.
2060 int snd_soc_codec_set_sysclk(struct snd_soc_codec *codec, int clk_id,
2061 int source, unsigned int freq, int dir)
2063 if (codec->driver->set_sysclk)
2064 return codec->driver->set_sysclk(codec, clk_id, source,
2069 EXPORT_SYMBOL_GPL(snd_soc_codec_set_sysclk);
2072 * snd_soc_dai_set_clkdiv - configure DAI clock dividers.
2074 * @div_id: DAI specific clock divider ID
2075 * @div: new clock divisor.
2077 * Configures the clock dividers. This is used to derive the best DAI bit and
2078 * frame clocks from the system or master clock. It's best to set the DAI bit
2079 * and frame clocks as low as possible to save system power.
2081 int snd_soc_dai_set_clkdiv(struct snd_soc_dai *dai,
2082 int div_id, int div)
2084 if (dai->driver && dai->driver->ops->set_clkdiv)
2085 return dai->driver->ops->set_clkdiv(dai, div_id, div);
2089 EXPORT_SYMBOL_GPL(snd_soc_dai_set_clkdiv);
2092 * snd_soc_dai_set_pll - configure DAI PLL.
2094 * @pll_id: DAI specific PLL ID
2095 * @source: DAI specific source for the PLL
2096 * @freq_in: PLL input clock frequency in Hz
2097 * @freq_out: requested PLL output clock frequency in Hz
2099 * Configures and enables PLL to generate output clock based on input clock.
2101 int snd_soc_dai_set_pll(struct snd_soc_dai *dai, int pll_id, int source,
2102 unsigned int freq_in, unsigned int freq_out)
2104 if (dai->driver && dai->driver->ops->set_pll)
2105 return dai->driver->ops->set_pll(dai, pll_id, source,
2107 else if (dai->codec && dai->codec->driver->set_pll)
2108 return dai->codec->driver->set_pll(dai->codec, pll_id, source,
2113 EXPORT_SYMBOL_GPL(snd_soc_dai_set_pll);
2116 * snd_soc_codec_set_pll - configure codec PLL.
2118 * @pll_id: DAI specific PLL ID
2119 * @source: DAI specific source for the PLL
2120 * @freq_in: PLL input clock frequency in Hz
2121 * @freq_out: requested PLL output clock frequency in Hz
2123 * Configures and enables PLL to generate output clock based on input clock.
2125 int snd_soc_codec_set_pll(struct snd_soc_codec *codec, int pll_id, int source,
2126 unsigned int freq_in, unsigned int freq_out)
2128 if (codec->driver->set_pll)
2129 return codec->driver->set_pll(codec, pll_id, source,
2134 EXPORT_SYMBOL_GPL(snd_soc_codec_set_pll);
2137 * snd_soc_dai_set_bclk_ratio - configure BCLK to sample rate ratio.
2139 * @ratio Ratio of BCLK to Sample rate.
2141 * Configures the DAI for a preset BCLK to sample rate ratio.
2143 int snd_soc_dai_set_bclk_ratio(struct snd_soc_dai *dai, unsigned int ratio)
2145 if (dai->driver && dai->driver->ops->set_bclk_ratio)
2146 return dai->driver->ops->set_bclk_ratio(dai, ratio);
2150 EXPORT_SYMBOL_GPL(snd_soc_dai_set_bclk_ratio);
2153 * snd_soc_dai_set_fmt - configure DAI hardware audio format.
2155 * @fmt: SND_SOC_DAIFMT_ format value.
2157 * Configures the DAI hardware format and clocking.
2159 int snd_soc_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
2161 if (dai->driver == NULL)
2163 if (dai->driver->ops->set_fmt == NULL)
2165 return dai->driver->ops->set_fmt(dai, fmt);
2167 EXPORT_SYMBOL_GPL(snd_soc_dai_set_fmt);
2170 * snd_soc_xlate_tdm_slot - generate tx/rx slot mask.
2171 * @slots: Number of slots in use.
2172 * @tx_mask: bitmask representing active TX slots.
2173 * @rx_mask: bitmask representing active RX slots.
2175 * Generates the TDM tx and rx slot default masks for DAI.
2177 static int snd_soc_xlate_tdm_slot_mask(unsigned int slots,
2178 unsigned int *tx_mask,
2179 unsigned int *rx_mask)
2181 if (*tx_mask || *rx_mask)
2187 *tx_mask = (1 << slots) - 1;
2188 *rx_mask = (1 << slots) - 1;
2194 * snd_soc_dai_set_tdm_slot() - Configures a DAI for TDM operation
2195 * @dai: The DAI to configure
2196 * @tx_mask: bitmask representing active TX slots.
2197 * @rx_mask: bitmask representing active RX slots.
2198 * @slots: Number of slots in use.
2199 * @slot_width: Width in bits for each slot.
2201 * This function configures the specified DAI for TDM operation. @slot contains
2202 * the total number of slots of the TDM stream and @slot_with the width of each
2203 * slot in bit clock cycles. @tx_mask and @rx_mask are bitmasks specifying the
2204 * active slots of the TDM stream for the specified DAI, i.e. which slots the
2205 * DAI should write to or read from. If a bit is set the corresponding slot is
2206 * active, if a bit is cleared the corresponding slot is inactive. Bit 0 maps to
2207 * the first slot, bit 1 to the second slot and so on. The first active slot
2208 * maps to the first channel of the DAI, the second active slot to the second
2209 * channel and so on.
2211 * TDM mode can be disabled by passing 0 for @slots. In this case @tx_mask,
2212 * @rx_mask and @slot_width will be ignored.
2214 * Returns 0 on success, a negative error code otherwise.
2216 int snd_soc_dai_set_tdm_slot(struct snd_soc_dai *dai,
2217 unsigned int tx_mask, unsigned int rx_mask, int slots, int slot_width)
2219 if (dai->driver && dai->driver->ops->xlate_tdm_slot_mask)
2220 dai->driver->ops->xlate_tdm_slot_mask(slots,
2221 &tx_mask, &rx_mask);
2223 snd_soc_xlate_tdm_slot_mask(slots, &tx_mask, &rx_mask);
2225 dai->tx_mask = tx_mask;
2226 dai->rx_mask = rx_mask;
2228 if (dai->driver && dai->driver->ops->set_tdm_slot)
2229 return dai->driver->ops->set_tdm_slot(dai, tx_mask, rx_mask,
2234 EXPORT_SYMBOL_GPL(snd_soc_dai_set_tdm_slot);
2237 * snd_soc_dai_set_channel_map - configure DAI audio channel map
2239 * @tx_num: how many TX channels
2240 * @tx_slot: pointer to an array which imply the TX slot number channel
2242 * @rx_num: how many RX channels
2243 * @rx_slot: pointer to an array which imply the RX slot number channel
2246 * configure the relationship between channel number and TDM slot number.
2248 int snd_soc_dai_set_channel_map(struct snd_soc_dai *dai,
2249 unsigned int tx_num, unsigned int *tx_slot,
2250 unsigned int rx_num, unsigned int *rx_slot)
2252 if (dai->driver && dai->driver->ops->set_channel_map)
2253 return dai->driver->ops->set_channel_map(dai, tx_num, tx_slot,
2258 EXPORT_SYMBOL_GPL(snd_soc_dai_set_channel_map);
2261 * snd_soc_dai_set_tristate - configure DAI system or master clock.
2263 * @tristate: tristate enable
2265 * Tristates the DAI so that others can use it.
2267 int snd_soc_dai_set_tristate(struct snd_soc_dai *dai, int tristate)
2269 if (dai->driver && dai->driver->ops->set_tristate)
2270 return dai->driver->ops->set_tristate(dai, tristate);
2274 EXPORT_SYMBOL_GPL(snd_soc_dai_set_tristate);
2277 * snd_soc_dai_digital_mute - configure DAI system or master clock.
2279 * @mute: mute enable
2280 * @direction: stream to mute
2282 * Mutes the DAI DAC.
2284 int snd_soc_dai_digital_mute(struct snd_soc_dai *dai, int mute,
2290 if (dai->driver->ops->mute_stream)
2291 return dai->driver->ops->mute_stream(dai, mute, direction);
2292 else if (direction == SNDRV_PCM_STREAM_PLAYBACK &&
2293 dai->driver->ops->digital_mute)
2294 return dai->driver->ops->digital_mute(dai, mute);
2298 EXPORT_SYMBOL_GPL(snd_soc_dai_digital_mute);
2300 static int snd_soc_init_multicodec(struct snd_soc_card *card,
2301 struct snd_soc_dai_link *dai_link)
2303 /* Legacy codec/codec_dai link is a single entry in multicodec */
2304 if (dai_link->codec_name || dai_link->codec_of_node ||
2305 dai_link->codec_dai_name) {
2306 dai_link->num_codecs = 1;
2308 dai_link->codecs = devm_kzalloc(card->dev,
2309 sizeof(struct snd_soc_dai_link_component),
2311 if (!dai_link->codecs)
2314 dai_link->codecs[0].name = dai_link->codec_name;
2315 dai_link->codecs[0].of_node = dai_link->codec_of_node;
2316 dai_link->codecs[0].dai_name = dai_link->codec_dai_name;
2319 if (!dai_link->codecs) {
2320 dev_err(card->dev, "ASoC: DAI link has no CODECs\n");
2328 * snd_soc_register_card - Register a card with the ASoC core
2330 * @card: Card to register
2333 int snd_soc_register_card(struct snd_soc_card *card)
2337 if (!card->name || !card->dev)
2340 for (i = 0; i < card->num_links; i++) {
2341 struct snd_soc_dai_link *link = &card->dai_link[i];
2343 ret = snd_soc_init_multicodec(card, link);
2345 dev_err(card->dev, "ASoC: failed to init multicodec\n");
2349 for (j = 0; j < link->num_codecs; j++) {
2351 * Codec must be specified by 1 of name or OF node,
2352 * not both or neither.
2354 if (!!link->codecs[j].name ==
2355 !!link->codecs[j].of_node) {
2356 dev_err(card->dev, "ASoC: Neither/both codec name/of_node are set for %s\n",
2360 /* Codec DAI name must be specified */
2361 if (!link->codecs[j].dai_name) {
2362 dev_err(card->dev, "ASoC: codec_dai_name not set for %s\n",
2369 * Platform may be specified by either name or OF node, but
2370 * can be left unspecified, and a dummy platform will be used.
2372 if (link->platform_name && link->platform_of_node) {
2374 "ASoC: Both platform name/of_node are set for %s\n",
2380 * CPU device may be specified by either name or OF node, but
2381 * can be left unspecified, and will be matched based on DAI
2384 if (link->cpu_name && link->cpu_of_node) {
2386 "ASoC: Neither/both cpu name/of_node are set for %s\n",
2391 * At least one of CPU DAI name or CPU device name/node must be
2394 if (!link->cpu_dai_name &&
2395 !(link->cpu_name || link->cpu_of_node)) {
2397 "ASoC: Neither cpu_dai_name nor cpu_name/of_node are set for %s\n",
2403 dev_set_drvdata(card->dev, card);
2405 snd_soc_initialize_card_lists(card);
2407 card->rtd = devm_kzalloc(card->dev,
2408 sizeof(struct snd_soc_pcm_runtime) *
2409 (card->num_links + card->num_aux_devs),
2411 if (card->rtd == NULL)
2414 card->rtd_aux = &card->rtd[card->num_links];
2416 for (i = 0; i < card->num_links; i++) {
2417 card->rtd[i].card = card;
2418 card->rtd[i].dai_link = &card->dai_link[i];
2419 card->rtd[i].codec_dais = devm_kzalloc(card->dev,
2420 sizeof(struct snd_soc_dai *) *
2421 (card->rtd[i].dai_link->num_codecs),
2423 if (card->rtd[i].codec_dais == NULL)
2427 for (i = 0; i < card->num_aux_devs; i++)
2428 card->rtd_aux[i].card = card;
2430 INIT_LIST_HEAD(&card->dapm_dirty);
2431 card->instantiated = 0;
2432 mutex_init(&card->mutex);
2433 mutex_init(&card->dapm_mutex);
2435 ret = snd_soc_instantiate_card(card);
2439 /* deactivate pins to sleep state */
2440 for (i = 0; i < card->num_rtd; i++) {
2441 struct snd_soc_pcm_runtime *rtd = &card->rtd[i];
2442 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
2445 for (j = 0; j < rtd->num_codecs; j++) {
2446 struct snd_soc_dai *codec_dai = rtd->codec_dais[j];
2447 if (!codec_dai->active)
2448 pinctrl_pm_select_sleep_state(codec_dai->dev);
2451 if (!cpu_dai->active)
2452 pinctrl_pm_select_sleep_state(cpu_dai->dev);
2457 EXPORT_SYMBOL_GPL(snd_soc_register_card);
2460 * snd_soc_unregister_card - Unregister a card with the ASoC core
2462 * @card: Card to unregister
2465 int snd_soc_unregister_card(struct snd_soc_card *card)
2467 if (card->instantiated) {
2468 card->instantiated = false;
2469 snd_soc_dapm_shutdown(card);
2470 soc_cleanup_card_resources(card);
2471 dev_dbg(card->dev, "ASoC: Unregistered card '%s'\n", card->name);
2476 EXPORT_SYMBOL_GPL(snd_soc_unregister_card);
2479 * Simplify DAI link configuration by removing ".-1" from device names
2480 * and sanitizing names.
2482 static char *fmt_single_name(struct device *dev, int *id)
2484 char *found, name[NAME_SIZE];
2487 if (dev_name(dev) == NULL)
2490 strlcpy(name, dev_name(dev), NAME_SIZE);
2492 /* are we a "%s.%d" name (platform and SPI components) */
2493 found = strstr(name, dev->driver->name);
2496 if (sscanf(&found[strlen(dev->driver->name)], ".%d", id) == 1) {
2498 /* discard ID from name if ID == -1 */
2500 found[strlen(dev->driver->name)] = '\0';
2504 /* I2C component devices are named "bus-addr" */
2505 if (sscanf(name, "%x-%x", &id1, &id2) == 2) {
2506 char tmp[NAME_SIZE];
2508 /* create unique ID number from I2C addr and bus */
2509 *id = ((id1 & 0xffff) << 16) + id2;
2511 /* sanitize component name for DAI link creation */
2512 snprintf(tmp, NAME_SIZE, "%s.%s", dev->driver->name, name);
2513 strlcpy(name, tmp, NAME_SIZE);
2518 return kstrdup(name, GFP_KERNEL);
2522 * Simplify DAI link naming for single devices with multiple DAIs by removing
2523 * any ".-1" and using the DAI name (instead of device name).
2525 static inline char *fmt_multiple_name(struct device *dev,
2526 struct snd_soc_dai_driver *dai_drv)
2528 if (dai_drv->name == NULL) {
2530 "ASoC: error - multiple DAI %s registered with no name\n",
2535 return kstrdup(dai_drv->name, GFP_KERNEL);
2539 * snd_soc_unregister_dai - Unregister DAIs from the ASoC core
2541 * @component: The component for which the DAIs should be unregistered
2543 static void snd_soc_unregister_dais(struct snd_soc_component *component)
2545 struct snd_soc_dai *dai, *_dai;
2547 list_for_each_entry_safe(dai, _dai, &component->dai_list, list) {
2548 dev_dbg(component->dev, "ASoC: Unregistered DAI '%s'\n",
2550 list_del(&dai->list);
2557 * snd_soc_register_dais - Register a DAI with the ASoC core
2559 * @component: The component the DAIs are registered for
2560 * @dai_drv: DAI driver to use for the DAIs
2561 * @count: Number of DAIs
2562 * @legacy_dai_naming: Use the legacy naming scheme and let the DAI inherit the
2565 static int snd_soc_register_dais(struct snd_soc_component *component,
2566 struct snd_soc_dai_driver *dai_drv, size_t count,
2567 bool legacy_dai_naming)
2569 struct device *dev = component->dev;
2570 struct snd_soc_dai *dai;
2574 dev_dbg(dev, "ASoC: dai register %s #%Zu\n", dev_name(dev), count);
2576 component->dai_drv = dai_drv;
2577 component->num_dai = count;
2579 for (i = 0; i < count; i++) {
2581 dai = kzalloc(sizeof(struct snd_soc_dai), GFP_KERNEL);
2588 * Back in the old days when we still had component-less DAIs,
2589 * instead of having a static name, component-less DAIs would
2590 * inherit the name of the parent device so it is possible to
2591 * register multiple instances of the DAI. We still need to keep
2592 * the same naming style even though those DAIs are not
2593 * component-less anymore.
2595 if (count == 1 && legacy_dai_naming) {
2596 dai->name = fmt_single_name(dev, &dai->id);
2598 dai->name = fmt_multiple_name(dev, &dai_drv[i]);
2600 dai->id = dai_drv[i].id;
2604 if (dai->name == NULL) {
2610 dai->component = component;
2612 dai->driver = &dai_drv[i];
2613 if (!dai->driver->ops)
2614 dai->driver->ops = &null_dai_ops;
2616 list_add(&dai->list, &component->dai_list);
2618 dev_dbg(dev, "ASoC: Registered DAI '%s'\n", dai->name);
2624 snd_soc_unregister_dais(component);
2629 static void snd_soc_component_seq_notifier(struct snd_soc_dapm_context *dapm,
2630 enum snd_soc_dapm_type type, int subseq)
2632 struct snd_soc_component *component = dapm->component;
2634 component->driver->seq_notifier(component, type, subseq);
2637 static int snd_soc_component_stream_event(struct snd_soc_dapm_context *dapm,
2640 struct snd_soc_component *component = dapm->component;
2642 return component->driver->stream_event(component, event);
2645 static int snd_soc_component_initialize(struct snd_soc_component *component,
2646 const struct snd_soc_component_driver *driver, struct device *dev)
2648 struct snd_soc_dapm_context *dapm;
2650 component->name = fmt_single_name(dev, &component->id);
2651 if (!component->name) {
2652 dev_err(dev, "ASoC: Failed to allocate name\n");
2656 component->dev = dev;
2657 component->driver = driver;
2658 component->probe = component->driver->probe;
2659 component->remove = component->driver->remove;
2661 if (!component->dapm_ptr)
2662 component->dapm_ptr = &component->dapm;
2664 dapm = component->dapm_ptr;
2666 dapm->component = component;
2667 dapm->bias_level = SND_SOC_BIAS_OFF;
2668 dapm->idle_bias_off = true;
2669 if (driver->seq_notifier)
2670 dapm->seq_notifier = snd_soc_component_seq_notifier;
2671 if (driver->stream_event)
2672 dapm->stream_event = snd_soc_component_stream_event;
2674 component->controls = driver->controls;
2675 component->num_controls = driver->num_controls;
2676 component->dapm_widgets = driver->dapm_widgets;
2677 component->num_dapm_widgets = driver->num_dapm_widgets;
2678 component->dapm_routes = driver->dapm_routes;
2679 component->num_dapm_routes = driver->num_dapm_routes;
2681 INIT_LIST_HEAD(&component->dai_list);
2682 mutex_init(&component->io_mutex);
2687 static void snd_soc_component_setup_regmap(struct snd_soc_component *component)
2689 int val_bytes = regmap_get_val_bytes(component->regmap);
2691 /* Errors are legitimate for non-integer byte multiples */
2693 component->val_bytes = val_bytes;
2696 #ifdef CONFIG_REGMAP
2699 * snd_soc_component_init_regmap() - Initialize regmap instance for the component
2700 * @component: The component for which to initialize the regmap instance
2701 * @regmap: The regmap instance that should be used by the component
2703 * This function allows deferred assignment of the regmap instance that is
2704 * associated with the component. Only use this if the regmap instance is not
2705 * yet ready when the component is registered. The function must also be called
2706 * before the first IO attempt of the component.
2708 void snd_soc_component_init_regmap(struct snd_soc_component *component,
2709 struct regmap *regmap)
2711 component->regmap = regmap;
2712 snd_soc_component_setup_regmap(component);
2714 EXPORT_SYMBOL_GPL(snd_soc_component_init_regmap);
2717 * snd_soc_component_exit_regmap() - De-initialize regmap instance for the component
2718 * @component: The component for which to de-initialize the regmap instance
2720 * Calls regmap_exit() on the regmap instance associated to the component and
2721 * removes the regmap instance from the component.
2723 * This function should only be used if snd_soc_component_init_regmap() was used
2724 * to initialize the regmap instance.
2726 void snd_soc_component_exit_regmap(struct snd_soc_component *component)
2728 regmap_exit(component->regmap);
2729 component->regmap = NULL;
2731 EXPORT_SYMBOL_GPL(snd_soc_component_exit_regmap);
2735 static void snd_soc_component_add_unlocked(struct snd_soc_component *component)
2737 if (!component->write && !component->read) {
2738 if (!component->regmap)
2739 component->regmap = dev_get_regmap(component->dev, NULL);
2740 if (component->regmap)
2741 snd_soc_component_setup_regmap(component);
2744 list_add(&component->list, &component_list);
2747 static void snd_soc_component_add(struct snd_soc_component *component)
2749 mutex_lock(&client_mutex);
2750 snd_soc_component_add_unlocked(component);
2751 mutex_unlock(&client_mutex);
2754 static void snd_soc_component_cleanup(struct snd_soc_component *component)
2756 snd_soc_unregister_dais(component);
2757 kfree(component->name);
2760 static void snd_soc_component_del_unlocked(struct snd_soc_component *component)
2762 list_del(&component->list);
2765 int snd_soc_register_component(struct device *dev,
2766 const struct snd_soc_component_driver *cmpnt_drv,
2767 struct snd_soc_dai_driver *dai_drv,
2770 struct snd_soc_component *cmpnt;
2773 cmpnt = kzalloc(sizeof(*cmpnt), GFP_KERNEL);
2775 dev_err(dev, "ASoC: Failed to allocate memory\n");
2779 ret = snd_soc_component_initialize(cmpnt, cmpnt_drv, dev);
2783 cmpnt->ignore_pmdown_time = true;
2784 cmpnt->registered_as_component = true;
2786 ret = snd_soc_register_dais(cmpnt, dai_drv, num_dai, true);
2788 dev_err(dev, "ASoC: Failed to regster DAIs: %d\n", ret);
2792 snd_soc_component_add(cmpnt);
2797 snd_soc_component_cleanup(cmpnt);
2802 EXPORT_SYMBOL_GPL(snd_soc_register_component);
2805 * snd_soc_unregister_component - Unregister a component from the ASoC core
2808 void snd_soc_unregister_component(struct device *dev)
2810 struct snd_soc_component *cmpnt;
2812 mutex_lock(&client_mutex);
2813 list_for_each_entry(cmpnt, &component_list, list) {
2814 if (dev == cmpnt->dev && cmpnt->registered_as_component)
2817 mutex_unlock(&client_mutex);
2821 snd_soc_component_del_unlocked(cmpnt);
2822 mutex_unlock(&client_mutex);
2823 snd_soc_component_cleanup(cmpnt);
2826 EXPORT_SYMBOL_GPL(snd_soc_unregister_component);
2828 static int snd_soc_platform_drv_probe(struct snd_soc_component *component)
2830 struct snd_soc_platform *platform = snd_soc_component_to_platform(component);
2832 return platform->driver->probe(platform);
2835 static void snd_soc_platform_drv_remove(struct snd_soc_component *component)
2837 struct snd_soc_platform *platform = snd_soc_component_to_platform(component);
2839 platform->driver->remove(platform);
2843 * snd_soc_add_platform - Add a platform to the ASoC core
2844 * @dev: The parent device for the platform
2845 * @platform: The platform to add
2846 * @platform_driver: The driver for the platform
2848 int snd_soc_add_platform(struct device *dev, struct snd_soc_platform *platform,
2849 const struct snd_soc_platform_driver *platform_drv)
2853 ret = snd_soc_component_initialize(&platform->component,
2854 &platform_drv->component_driver, dev);
2858 platform->dev = dev;
2859 platform->driver = platform_drv;
2861 if (platform_drv->probe)
2862 platform->component.probe = snd_soc_platform_drv_probe;
2863 if (platform_drv->remove)
2864 platform->component.remove = snd_soc_platform_drv_remove;
2866 #ifdef CONFIG_DEBUG_FS
2867 platform->component.debugfs_prefix = "platform";
2870 mutex_lock(&client_mutex);
2871 snd_soc_component_add_unlocked(&platform->component);
2872 list_add(&platform->list, &platform_list);
2873 mutex_unlock(&client_mutex);
2875 dev_dbg(dev, "ASoC: Registered platform '%s'\n",
2876 platform->component.name);
2880 EXPORT_SYMBOL_GPL(snd_soc_add_platform);
2883 * snd_soc_register_platform - Register a platform with the ASoC core
2885 * @platform: platform to register
2887 int snd_soc_register_platform(struct device *dev,
2888 const struct snd_soc_platform_driver *platform_drv)
2890 struct snd_soc_platform *platform;
2893 dev_dbg(dev, "ASoC: platform register %s\n", dev_name(dev));
2895 platform = kzalloc(sizeof(struct snd_soc_platform), GFP_KERNEL);
2896 if (platform == NULL)
2899 ret = snd_soc_add_platform(dev, platform, platform_drv);
2905 EXPORT_SYMBOL_GPL(snd_soc_register_platform);
2908 * snd_soc_remove_platform - Remove a platform from the ASoC core
2909 * @platform: the platform to remove
2911 void snd_soc_remove_platform(struct snd_soc_platform *platform)
2914 mutex_lock(&client_mutex);
2915 list_del(&platform->list);
2916 snd_soc_component_del_unlocked(&platform->component);
2917 mutex_unlock(&client_mutex);
2919 dev_dbg(platform->dev, "ASoC: Unregistered platform '%s'\n",
2920 platform->component.name);
2922 snd_soc_component_cleanup(&platform->component);
2924 EXPORT_SYMBOL_GPL(snd_soc_remove_platform);
2926 struct snd_soc_platform *snd_soc_lookup_platform(struct device *dev)
2928 struct snd_soc_platform *platform;
2930 mutex_lock(&client_mutex);
2931 list_for_each_entry(platform, &platform_list, list) {
2932 if (dev == platform->dev) {
2933 mutex_unlock(&client_mutex);
2937 mutex_unlock(&client_mutex);
2941 EXPORT_SYMBOL_GPL(snd_soc_lookup_platform);
2944 * snd_soc_unregister_platform - Unregister a platform from the ASoC core
2946 * @platform: platform to unregister
2948 void snd_soc_unregister_platform(struct device *dev)
2950 struct snd_soc_platform *platform;
2952 platform = snd_soc_lookup_platform(dev);
2956 snd_soc_remove_platform(platform);
2959 EXPORT_SYMBOL_GPL(snd_soc_unregister_platform);
2961 static u64 codec_format_map[] = {
2962 SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S16_BE,
2963 SNDRV_PCM_FMTBIT_U16_LE | SNDRV_PCM_FMTBIT_U16_BE,
2964 SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S24_BE,
2965 SNDRV_PCM_FMTBIT_U24_LE | SNDRV_PCM_FMTBIT_U24_BE,
2966 SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_S32_BE,
2967 SNDRV_PCM_FMTBIT_U32_LE | SNDRV_PCM_FMTBIT_U32_BE,
2968 SNDRV_PCM_FMTBIT_S24_3LE | SNDRV_PCM_FMTBIT_U24_3BE,
2969 SNDRV_PCM_FMTBIT_U24_3LE | SNDRV_PCM_FMTBIT_U24_3BE,
2970 SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S20_3BE,
2971 SNDRV_PCM_FMTBIT_U20_3LE | SNDRV_PCM_FMTBIT_U20_3BE,
2972 SNDRV_PCM_FMTBIT_S18_3LE | SNDRV_PCM_FMTBIT_S18_3BE,
2973 SNDRV_PCM_FMTBIT_U18_3LE | SNDRV_PCM_FMTBIT_U18_3BE,
2974 SNDRV_PCM_FMTBIT_FLOAT_LE | SNDRV_PCM_FMTBIT_FLOAT_BE,
2975 SNDRV_PCM_FMTBIT_FLOAT64_LE | SNDRV_PCM_FMTBIT_FLOAT64_BE,
2976 SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE
2977 | SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_BE,
2980 /* Fix up the DAI formats for endianness: codecs don't actually see
2981 * the endianness of the data but we're using the CPU format
2982 * definitions which do need to include endianness so we ensure that
2983 * codec DAIs always have both big and little endian variants set.
2985 static void fixup_codec_formats(struct snd_soc_pcm_stream *stream)
2989 for (i = 0; i < ARRAY_SIZE(codec_format_map); i++)
2990 if (stream->formats & codec_format_map[i])
2991 stream->formats |= codec_format_map[i];
2994 static int snd_soc_codec_drv_probe(struct snd_soc_component *component)
2996 struct snd_soc_codec *codec = snd_soc_component_to_codec(component);
2998 return codec->driver->probe(codec);
3001 static void snd_soc_codec_drv_remove(struct snd_soc_component *component)
3003 struct snd_soc_codec *codec = snd_soc_component_to_codec(component);
3005 codec->driver->remove(codec);
3008 static int snd_soc_codec_drv_write(struct snd_soc_component *component,
3009 unsigned int reg, unsigned int val)
3011 struct snd_soc_codec *codec = snd_soc_component_to_codec(component);
3013 return codec->driver->write(codec, reg, val);
3016 static int snd_soc_codec_drv_read(struct snd_soc_component *component,
3017 unsigned int reg, unsigned int *val)
3019 struct snd_soc_codec *codec = snd_soc_component_to_codec(component);
3021 *val = codec->driver->read(codec, reg);
3026 static int snd_soc_codec_set_bias_level(struct snd_soc_dapm_context *dapm,
3027 enum snd_soc_bias_level level)
3029 struct snd_soc_codec *codec = snd_soc_dapm_to_codec(dapm);
3031 return codec->driver->set_bias_level(codec, level);
3035 * snd_soc_register_codec - Register a codec with the ASoC core
3037 * @codec: codec to register
3039 int snd_soc_register_codec(struct device *dev,
3040 const struct snd_soc_codec_driver *codec_drv,
3041 struct snd_soc_dai_driver *dai_drv,
3044 struct snd_soc_codec *codec;
3045 struct snd_soc_dai *dai;
3048 dev_dbg(dev, "codec register %s\n", dev_name(dev));
3050 codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL);
3054 codec->component.dapm_ptr = &codec->dapm;
3055 codec->component.codec = codec;
3057 ret = snd_soc_component_initialize(&codec->component,
3058 &codec_drv->component_driver, dev);
3062 if (codec_drv->controls) {
3063 codec->component.controls = codec_drv->controls;
3064 codec->component.num_controls = codec_drv->num_controls;
3066 if (codec_drv->dapm_widgets) {
3067 codec->component.dapm_widgets = codec_drv->dapm_widgets;
3068 codec->component.num_dapm_widgets = codec_drv->num_dapm_widgets;
3070 if (codec_drv->dapm_routes) {
3071 codec->component.dapm_routes = codec_drv->dapm_routes;
3072 codec->component.num_dapm_routes = codec_drv->num_dapm_routes;
3075 if (codec_drv->probe)
3076 codec->component.probe = snd_soc_codec_drv_probe;
3077 if (codec_drv->remove)
3078 codec->component.remove = snd_soc_codec_drv_remove;
3079 if (codec_drv->write)
3080 codec->component.write = snd_soc_codec_drv_write;
3081 if (codec_drv->read)
3082 codec->component.read = snd_soc_codec_drv_read;
3083 codec->component.ignore_pmdown_time = codec_drv->ignore_pmdown_time;
3084 codec->dapm.idle_bias_off = codec_drv->idle_bias_off;
3085 codec->dapm.suspend_bias_off = codec_drv->suspend_bias_off;
3086 if (codec_drv->seq_notifier)
3087 codec->dapm.seq_notifier = codec_drv->seq_notifier;
3088 if (codec_drv->set_bias_level)
3089 codec->dapm.set_bias_level = snd_soc_codec_set_bias_level;
3091 codec->driver = codec_drv;
3092 codec->component.val_bytes = codec_drv->reg_word_size;
3094 #ifdef CONFIG_DEBUG_FS
3095 codec->component.init_debugfs = soc_init_codec_debugfs;
3096 codec->component.debugfs_prefix = "codec";
3099 if (codec_drv->get_regmap)
3100 codec->component.regmap = codec_drv->get_regmap(dev);
3102 for (i = 0; i < num_dai; i++) {
3103 fixup_codec_formats(&dai_drv[i].playback);
3104 fixup_codec_formats(&dai_drv[i].capture);
3107 ret = snd_soc_register_dais(&codec->component, dai_drv, num_dai, false);
3109 dev_err(dev, "ASoC: Failed to regster DAIs: %d\n", ret);
3113 list_for_each_entry(dai, &codec->component.dai_list, list)
3116 mutex_lock(&client_mutex);
3117 snd_soc_component_add_unlocked(&codec->component);
3118 list_add(&codec->list, &codec_list);
3119 mutex_unlock(&client_mutex);
3121 dev_dbg(codec->dev, "ASoC: Registered codec '%s'\n",
3122 codec->component.name);
3126 snd_soc_component_cleanup(&codec->component);
3131 EXPORT_SYMBOL_GPL(snd_soc_register_codec);
3134 * snd_soc_unregister_codec - Unregister a codec from the ASoC core
3136 * @codec: codec to unregister
3138 void snd_soc_unregister_codec(struct device *dev)
3140 struct snd_soc_codec *codec;
3142 mutex_lock(&client_mutex);
3143 list_for_each_entry(codec, &codec_list, list) {
3144 if (dev == codec->dev)
3147 mutex_unlock(&client_mutex);
3151 list_del(&codec->list);
3152 snd_soc_component_del_unlocked(&codec->component);
3153 mutex_unlock(&client_mutex);
3155 dev_dbg(codec->dev, "ASoC: Unregistered codec '%s'\n",
3156 codec->component.name);
3158 snd_soc_component_cleanup(&codec->component);
3159 snd_soc_cache_exit(codec);
3162 EXPORT_SYMBOL_GPL(snd_soc_unregister_codec);
3164 /* Retrieve a card's name from device tree */
3165 int snd_soc_of_parse_card_name(struct snd_soc_card *card,
3166 const char *propname)
3168 struct device_node *np;
3172 pr_err("card->dev is not set before calling %s\n", __func__);
3176 np = card->dev->of_node;
3178 ret = of_property_read_string_index(np, propname, 0, &card->name);
3180 * EINVAL means the property does not exist. This is fine providing
3181 * card->name was previously set, which is checked later in
3182 * snd_soc_register_card.
3184 if (ret < 0 && ret != -EINVAL) {
3186 "ASoC: Property '%s' could not be read: %d\n",
3193 EXPORT_SYMBOL_GPL(snd_soc_of_parse_card_name);
3195 static const struct snd_soc_dapm_widget simple_widgets[] = {
3196 SND_SOC_DAPM_MIC("Microphone", NULL),
3197 SND_SOC_DAPM_LINE("Line", NULL),
3198 SND_SOC_DAPM_HP("Headphone", NULL),
3199 SND_SOC_DAPM_SPK("Speaker", NULL),
3202 int snd_soc_of_parse_audio_simple_widgets(struct snd_soc_card *card,
3203 const char *propname)
3205 struct device_node *np = card->dev->of_node;
3206 struct snd_soc_dapm_widget *widgets;
3207 const char *template, *wname;
3208 int i, j, num_widgets, ret;
3210 num_widgets = of_property_count_strings(np, propname);
3211 if (num_widgets < 0) {
3213 "ASoC: Property '%s' does not exist\n", propname);
3216 if (num_widgets & 1) {
3218 "ASoC: Property '%s' length is not even\n", propname);
3224 dev_err(card->dev, "ASoC: Property '%s's length is zero\n",
3229 widgets = devm_kcalloc(card->dev, num_widgets, sizeof(*widgets),
3233 "ASoC: Could not allocate memory for widgets\n");
3237 for (i = 0; i < num_widgets; i++) {
3238 ret = of_property_read_string_index(np, propname,
3242 "ASoC: Property '%s' index %d read error:%d\n",
3243 propname, 2 * i, ret);
3247 for (j = 0; j < ARRAY_SIZE(simple_widgets); j++) {
3248 if (!strncmp(template, simple_widgets[j].name,
3249 strlen(simple_widgets[j].name))) {
3250 widgets[i] = simple_widgets[j];
3255 if (j >= ARRAY_SIZE(simple_widgets)) {
3257 "ASoC: DAPM widget '%s' is not supported\n",
3262 ret = of_property_read_string_index(np, propname,
3267 "ASoC: Property '%s' index %d read error:%d\n",
3268 propname, (2 * i) + 1, ret);
3272 widgets[i].name = wname;
3275 card->dapm_widgets = widgets;
3276 card->num_dapm_widgets = num_widgets;
3280 EXPORT_SYMBOL_GPL(snd_soc_of_parse_audio_simple_widgets);
3282 int snd_soc_of_parse_tdm_slot(struct device_node *np,
3283 unsigned int *slots,
3284 unsigned int *slot_width)
3289 if (of_property_read_bool(np, "dai-tdm-slot-num")) {
3290 ret = of_property_read_u32(np, "dai-tdm-slot-num", &val);
3298 if (of_property_read_bool(np, "dai-tdm-slot-width")) {
3299 ret = of_property_read_u32(np, "dai-tdm-slot-width", &val);
3309 EXPORT_SYMBOL_GPL(snd_soc_of_parse_tdm_slot);
3311 int snd_soc_of_parse_audio_routing(struct snd_soc_card *card,
3312 const char *propname)
3314 struct device_node *np = card->dev->of_node;
3316 struct snd_soc_dapm_route *routes;
3319 num_routes = of_property_count_strings(np, propname);
3320 if (num_routes < 0 || num_routes & 1) {
3322 "ASoC: Property '%s' does not exist or its length is not even\n",
3328 dev_err(card->dev, "ASoC: Property '%s's length is zero\n",
3333 routes = devm_kzalloc(card->dev, num_routes * sizeof(*routes),
3337 "ASoC: Could not allocate DAPM route table\n");
3341 for (i = 0; i < num_routes; i++) {
3342 ret = of_property_read_string_index(np, propname,
3343 2 * i, &routes[i].sink);
3346 "ASoC: Property '%s' index %d could not be read: %d\n",
3347 propname, 2 * i, ret);
3350 ret = of_property_read_string_index(np, propname,
3351 (2 * i) + 1, &routes[i].source);
3354 "ASoC: Property '%s' index %d could not be read: %d\n",
3355 propname, (2 * i) + 1, ret);
3360 card->num_dapm_routes = num_routes;
3361 card->dapm_routes = routes;
3365 EXPORT_SYMBOL_GPL(snd_soc_of_parse_audio_routing);
3367 unsigned int snd_soc_of_parse_daifmt(struct device_node *np,
3369 struct device_node **bitclkmaster,
3370 struct device_node **framemaster)
3374 unsigned int format = 0;
3380 } of_fmt_table[] = {
3381 { "i2s", SND_SOC_DAIFMT_I2S },
3382 { "right_j", SND_SOC_DAIFMT_RIGHT_J },
3383 { "left_j", SND_SOC_DAIFMT_LEFT_J },
3384 { "dsp_a", SND_SOC_DAIFMT_DSP_A },
3385 { "dsp_b", SND_SOC_DAIFMT_DSP_B },
3386 { "ac97", SND_SOC_DAIFMT_AC97 },
3387 { "pdm", SND_SOC_DAIFMT_PDM},
3388 { "msb", SND_SOC_DAIFMT_MSB },
3389 { "lsb", SND_SOC_DAIFMT_LSB },
3396 * check "[prefix]format = xxx"
3397 * SND_SOC_DAIFMT_FORMAT_MASK area
3399 snprintf(prop, sizeof(prop), "%sformat", prefix);
3400 ret = of_property_read_string(np, prop, &str);
3402 for (i = 0; i < ARRAY_SIZE(of_fmt_table); i++) {
3403 if (strcmp(str, of_fmt_table[i].name) == 0) {
3404 format |= of_fmt_table[i].val;
3411 * check "[prefix]continuous-clock"
3412 * SND_SOC_DAIFMT_CLOCK_MASK area
3414 snprintf(prop, sizeof(prop), "%scontinuous-clock", prefix);
3415 if (of_get_property(np, prop, NULL))
3416 format |= SND_SOC_DAIFMT_CONT;
3418 format |= SND_SOC_DAIFMT_GATED;
3421 * check "[prefix]bitclock-inversion"
3422 * check "[prefix]frame-inversion"
3423 * SND_SOC_DAIFMT_INV_MASK area
3425 snprintf(prop, sizeof(prop), "%sbitclock-inversion", prefix);
3426 bit = !!of_get_property(np, prop, NULL);
3428 snprintf(prop, sizeof(prop), "%sframe-inversion", prefix);
3429 frame = !!of_get_property(np, prop, NULL);
3431 switch ((bit << 4) + frame) {
3433 format |= SND_SOC_DAIFMT_IB_IF;
3436 format |= SND_SOC_DAIFMT_IB_NF;
3439 format |= SND_SOC_DAIFMT_NB_IF;
3442 /* SND_SOC_DAIFMT_NB_NF is default */
3447 * check "[prefix]bitclock-master"
3448 * check "[prefix]frame-master"
3449 * SND_SOC_DAIFMT_MASTER_MASK area
3451 snprintf(prop, sizeof(prop), "%sbitclock-master", prefix);
3452 bit = !!of_get_property(np, prop, NULL);
3453 if (bit && bitclkmaster)
3454 *bitclkmaster = of_parse_phandle(np, prop, 0);
3456 snprintf(prop, sizeof(prop), "%sframe-master", prefix);
3457 frame = !!of_get_property(np, prop, NULL);
3458 if (frame && framemaster)
3459 *framemaster = of_parse_phandle(np, prop, 0);
3461 switch ((bit << 4) + frame) {
3463 format |= SND_SOC_DAIFMT_CBM_CFM;
3466 format |= SND_SOC_DAIFMT_CBM_CFS;
3469 format |= SND_SOC_DAIFMT_CBS_CFM;
3472 format |= SND_SOC_DAIFMT_CBS_CFS;
3478 EXPORT_SYMBOL_GPL(snd_soc_of_parse_daifmt);
3480 static int snd_soc_get_dai_name(struct of_phandle_args *args,
3481 const char **dai_name)
3483 struct snd_soc_component *pos;
3484 int ret = -EPROBE_DEFER;
3486 mutex_lock(&client_mutex);
3487 list_for_each_entry(pos, &component_list, list) {
3488 if (pos->dev->of_node != args->np)
3491 if (pos->driver->of_xlate_dai_name) {
3492 ret = pos->driver->of_xlate_dai_name(pos,
3498 switch (args->args_count) {
3500 id = 0; /* same as dai_drv[0] */
3510 if (id < 0 || id >= pos->num_dai) {
3517 *dai_name = pos->dai_drv[id].name;
3519 *dai_name = pos->name;
3524 mutex_unlock(&client_mutex);
3528 int snd_soc_of_get_dai_name(struct device_node *of_node,
3529 const char **dai_name)
3531 struct of_phandle_args args;
3534 ret = of_parse_phandle_with_args(of_node, "sound-dai",
3535 "#sound-dai-cells", 0, &args);
3539 ret = snd_soc_get_dai_name(&args, dai_name);
3541 of_node_put(args.np);
3545 EXPORT_SYMBOL_GPL(snd_soc_of_get_dai_name);
3548 * snd_soc_of_get_dai_link_codecs - Parse a list of CODECs in the devicetree
3550 * @of_node: Device node
3551 * @dai_link: DAI link
3553 * Builds an array of CODEC DAI components from the DAI link property
3555 * The array is set in the DAI link and the number of DAIs is set accordingly.
3556 * The device nodes in the array (of_node) must be dereferenced by the caller.
3558 * Returns 0 for success
3560 int snd_soc_of_get_dai_link_codecs(struct device *dev,
3561 struct device_node *of_node,
3562 struct snd_soc_dai_link *dai_link)
3564 struct of_phandle_args args;
3565 struct snd_soc_dai_link_component *component;
3567 int index, num_codecs, ret;
3569 /* Count the number of CODECs */
3571 num_codecs = of_count_phandle_with_args(of_node, name,
3572 "#sound-dai-cells");
3573 if (num_codecs <= 0) {
3574 if (num_codecs == -ENOENT)
3575 dev_err(dev, "No 'sound-dai' property\n");
3577 dev_err(dev, "Bad phandle in 'sound-dai'\n");
3580 component = devm_kzalloc(dev,
3581 sizeof *component * num_codecs,
3585 dai_link->codecs = component;
3586 dai_link->num_codecs = num_codecs;
3588 /* Parse the list */
3589 for (index = 0, component = dai_link->codecs;
3590 index < dai_link->num_codecs;
3591 index++, component++) {
3592 ret = of_parse_phandle_with_args(of_node, name,
3597 component->of_node = args.np;
3598 ret = snd_soc_get_dai_name(&args, &component->dai_name);
3604 for (index = 0, component = dai_link->codecs;
3605 index < dai_link->num_codecs;
3606 index++, component++) {
3607 if (!component->of_node)
3609 of_node_put(component->of_node);
3610 component->of_node = NULL;
3612 dai_link->codecs = NULL;
3613 dai_link->num_codecs = 0;
3616 EXPORT_SYMBOL_GPL(snd_soc_of_get_dai_link_codecs);
3618 static int __init snd_soc_init(void)
3620 snd_soc_debugfs_init();
3621 snd_soc_util_init();
3623 return platform_driver_register(&soc_driver);
3625 module_init(snd_soc_init);
3627 static void __exit snd_soc_exit(void)
3629 snd_soc_util_exit();
3630 snd_soc_debugfs_exit();
3632 #ifdef CONFIG_DEBUG_FS
3634 platform_driver_unregister(&soc_driver);
3636 module_exit(snd_soc_exit);
3638 /* Module information */
3639 MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
3640 MODULE_DESCRIPTION("ALSA SoC Core");
3641 MODULE_LICENSE("GPL");
3642 MODULE_ALIAS("platform:soc-audio");