1 // SPDX-License-Identifier: GPL-2.0+
3 // soc-core.c -- ALSA SoC Audio Layer
5 // Copyright 2005 Wolfson Microelectronics PLC.
6 // Copyright 2005 Openedhand Ltd.
7 // Copyright (C) 2010 Slimlogic Ltd.
8 // Copyright (C) 2010 Texas Instruments Inc.
10 // Author: Liam Girdwood <lrg@slimlogic.co.uk>
11 // with code, comments and ideas from :-
12 // Richard Purdie <richard@openedhand.com>
15 // o Add hw rules to enforce rates, etc.
16 // o More testing with other codecs/machines.
17 // o Add more codecs and platforms to ensure good API coverage.
18 // o Support TDM on PCM and I2S
20 #include <linux/module.h>
21 #include <linux/moduleparam.h>
22 #include <linux/init.h>
23 #include <linux/delay.h>
25 #include <linux/bitops.h>
26 #include <linux/debugfs.h>
27 #include <linux/platform_device.h>
28 #include <linux/pinctrl/consumer.h>
29 #include <linux/ctype.h>
30 #include <linux/slab.h>
32 #include <linux/of_graph.h>
33 #include <linux/dmi.h>
34 #include <sound/core.h>
35 #include <sound/jack.h>
36 #include <sound/pcm.h>
37 #include <sound/pcm_params.h>
38 #include <sound/soc.h>
39 #include <sound/soc-dpcm.h>
40 #include <sound/soc-topology.h>
41 #include <sound/initval.h>
43 #define CREATE_TRACE_POINTS
44 #include <trace/events/asoc.h>
48 #ifdef CONFIG_DEBUG_FS
49 struct dentry *snd_soc_debugfs_root;
50 EXPORT_SYMBOL_GPL(snd_soc_debugfs_root);
53 static DEFINE_MUTEX(client_mutex);
54 static LIST_HEAD(component_list);
55 static LIST_HEAD(unbind_card_list);
57 #define for_each_component(component) \
58 list_for_each_entry(component, &component_list, list)
61 * This is used if driver don't need to have CPU/Codec/Platform
64 struct snd_soc_dai_link_component null_dailink_component[0];
65 EXPORT_SYMBOL_GPL(null_dailink_component);
68 * This is a timeout to do a DAPM powerdown after a stream is closed().
69 * It can be used to eliminate pops between different playback streams, e.g.
70 * between two audio tracks.
72 static int pmdown_time = 5000;
73 module_param(pmdown_time, int, 0);
74 MODULE_PARM_DESC(pmdown_time, "DAPM stream powerdown time (msecs)");
78 * If a DMI filed contain strings in this blacklist (e.g.
79 * "Type2 - Board Manufacturer" or "Type1 - TBD by OEM"), it will be taken
80 * as invalid and dropped when setting the card long name from DMI info.
82 static const char * const dmi_blacklist[] = {
83 "To be filled by OEM",
89 NULL, /* terminator */
93 static ssize_t pmdown_time_show(struct device *dev,
94 struct device_attribute *attr, char *buf)
96 struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev);
98 return sprintf(buf, "%ld\n", rtd->pmdown_time);
101 static ssize_t pmdown_time_set(struct device *dev,
102 struct device_attribute *attr,
103 const char *buf, size_t count)
105 struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev);
108 ret = kstrtol(buf, 10, &rtd->pmdown_time);
115 static DEVICE_ATTR(pmdown_time, 0644, pmdown_time_show, pmdown_time_set);
117 static struct attribute *soc_dev_attrs[] = {
118 &dev_attr_pmdown_time.attr,
122 static umode_t soc_dev_attr_is_visible(struct kobject *kobj,
123 struct attribute *attr, int idx)
125 struct device *dev = kobj_to_dev(kobj);
126 struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev);
131 if (attr == &dev_attr_pmdown_time.attr)
132 return attr->mode; /* always visible */
133 return rtd->num_codecs ? attr->mode : 0; /* enabled only with codec */
136 static const struct attribute_group soc_dapm_dev_group = {
137 .attrs = soc_dapm_dev_attrs,
138 .is_visible = soc_dev_attr_is_visible,
141 static const struct attribute_group soc_dev_group = {
142 .attrs = soc_dev_attrs,
143 .is_visible = soc_dev_attr_is_visible,
146 static const struct attribute_group *soc_dev_attr_groups[] = {
152 #ifdef CONFIG_DEBUG_FS
153 static void soc_init_component_debugfs(struct snd_soc_component *component)
155 if (!component->card->debugfs_card_root)
158 if (component->debugfs_prefix) {
161 name = kasprintf(GFP_KERNEL, "%s:%s",
162 component->debugfs_prefix, component->name);
164 component->debugfs_root = debugfs_create_dir(name,
165 component->card->debugfs_card_root);
169 component->debugfs_root = debugfs_create_dir(component->name,
170 component->card->debugfs_card_root);
173 snd_soc_dapm_debugfs_init(snd_soc_component_get_dapm(component),
174 component->debugfs_root);
177 static void soc_cleanup_component_debugfs(struct snd_soc_component *component)
179 if (!component->debugfs_root)
181 debugfs_remove_recursive(component->debugfs_root);
182 component->debugfs_root = NULL;
185 static int dai_list_show(struct seq_file *m, void *v)
187 struct snd_soc_component *component;
188 struct snd_soc_dai *dai;
190 mutex_lock(&client_mutex);
192 for_each_component(component)
193 for_each_component_dais(component, dai)
194 seq_printf(m, "%s\n", dai->name);
196 mutex_unlock(&client_mutex);
200 DEFINE_SHOW_ATTRIBUTE(dai_list);
202 static int component_list_show(struct seq_file *m, void *v)
204 struct snd_soc_component *component;
206 mutex_lock(&client_mutex);
208 for_each_component(component)
209 seq_printf(m, "%s\n", component->name);
211 mutex_unlock(&client_mutex);
215 DEFINE_SHOW_ATTRIBUTE(component_list);
217 static void soc_init_card_debugfs(struct snd_soc_card *card)
219 card->debugfs_card_root = debugfs_create_dir(card->name,
220 snd_soc_debugfs_root);
222 debugfs_create_u32("dapm_pop_time", 0644, card->debugfs_card_root,
225 snd_soc_dapm_debugfs_init(&card->dapm, card->debugfs_card_root);
228 static void soc_cleanup_card_debugfs(struct snd_soc_card *card)
230 debugfs_remove_recursive(card->debugfs_card_root);
231 card->debugfs_card_root = NULL;
234 static void snd_soc_debugfs_init(void)
236 snd_soc_debugfs_root = debugfs_create_dir("asoc", NULL);
238 debugfs_create_file("dais", 0444, snd_soc_debugfs_root, NULL,
241 debugfs_create_file("components", 0444, snd_soc_debugfs_root, NULL,
242 &component_list_fops);
245 static void snd_soc_debugfs_exit(void)
247 debugfs_remove_recursive(snd_soc_debugfs_root);
252 static inline void soc_init_component_debugfs(
253 struct snd_soc_component *component)
257 static inline void soc_cleanup_component_debugfs(
258 struct snd_soc_component *component)
262 static inline void soc_init_card_debugfs(struct snd_soc_card *card)
266 static inline void soc_cleanup_card_debugfs(struct snd_soc_card *card)
270 static inline void snd_soc_debugfs_init(void)
274 static inline void snd_soc_debugfs_exit(void)
281 * This is glue code between snd_pcm_lib_ioctl() and
282 * snd_soc_component_driver :: ioctl
284 int snd_soc_pcm_lib_ioctl(struct snd_soc_component *component,
285 struct snd_pcm_substream *substream,
286 unsigned int cmd, void *arg)
288 return snd_pcm_lib_ioctl(substream, cmd, arg);
290 EXPORT_SYMBOL_GPL(snd_soc_pcm_lib_ioctl);
292 static int snd_soc_rtdcom_add(struct snd_soc_pcm_runtime *rtd,
293 struct snd_soc_component *component)
295 struct snd_soc_rtdcom_list *rtdcom;
296 struct snd_soc_component *comp;
298 for_each_rtd_components(rtd, rtdcom, comp) {
299 /* already connected */
300 if (comp == component)
305 * created rtdcom here will be freed when rtd->dev was freed.
307 * soc_free_pcm_runtime() :: device_unregister(rtd->dev)
309 rtdcom = devm_kzalloc(rtd->dev, sizeof(*rtdcom), GFP_KERNEL);
313 rtdcom->component = component;
314 INIT_LIST_HEAD(&rtdcom->list);
317 * When rtd was freed, created rtdcom here will be
319 * And we don't need to call list_del(&rtdcom->list)
320 * when freed, because rtd is also freed.
322 list_add_tail(&rtdcom->list, &rtd->component_list);
327 struct snd_soc_component *snd_soc_rtdcom_lookup(struct snd_soc_pcm_runtime *rtd,
328 const char *driver_name)
330 struct snd_soc_rtdcom_list *rtdcom;
331 struct snd_soc_component *component;
339 * snd_soc_rtdcom_lookup() will find component from rtd by using
340 * specified driver name.
341 * But, if many components which have same driver name are connected
342 * to 1 rtd, this function will return 1st found component.
344 for_each_rtd_components(rtd, rtdcom, component) {
345 const char *component_name = component->driver->name;
350 if ((component_name == driver_name) ||
351 strcmp(component_name, driver_name) == 0)
352 return rtdcom->component;
357 EXPORT_SYMBOL_GPL(snd_soc_rtdcom_lookup);
359 static struct snd_soc_component
360 *snd_soc_lookup_component_nolocked(struct device *dev, const char *driver_name)
362 struct snd_soc_component *component;
363 struct snd_soc_component *found_component;
365 found_component = NULL;
366 for_each_component(component) {
367 if ((dev == component->dev) &&
369 (driver_name == component->driver->name) ||
370 (strcmp(component->driver->name, driver_name) == 0))) {
371 found_component = component;
376 return found_component;
379 struct snd_soc_component *snd_soc_lookup_component(struct device *dev,
380 const char *driver_name)
382 struct snd_soc_component *component;
384 mutex_lock(&client_mutex);
385 component = snd_soc_lookup_component_nolocked(dev, driver_name);
386 mutex_unlock(&client_mutex);
390 EXPORT_SYMBOL_GPL(snd_soc_lookup_component);
392 static const struct snd_soc_ops null_snd_soc_ops;
394 struct snd_soc_pcm_runtime
395 *snd_soc_get_pcm_runtime(struct snd_soc_card *card,
396 struct snd_soc_dai_link *dai_link)
398 struct snd_soc_pcm_runtime *rtd;
400 for_each_card_rtds(card, rtd) {
401 if (rtd->dai_link == dai_link)
404 dev_dbg(card->dev, "ASoC: failed to find rtd %s\n", dai_link->name);
407 EXPORT_SYMBOL_GPL(snd_soc_get_pcm_runtime);
409 static void soc_release_rtd_dev(struct device *dev)
411 /* "dev" means "rtd->dev" */
415 static void soc_free_pcm_runtime(struct snd_soc_pcm_runtime *rtd)
420 list_del(&rtd->list);
422 flush_delayed_work(&rtd->delayed_work);
423 snd_soc_pcm_component_free(rtd);
426 * we don't need to call kfree() for rtd->dev
428 * soc_release_rtd_dev()
430 * We don't need rtd->dev NULL check, because
431 * it is alloced *before* rtd.
433 * soc_new_pcm_runtime()
435 device_unregister(rtd->dev);
438 static struct snd_soc_pcm_runtime *soc_new_pcm_runtime(
439 struct snd_soc_card *card, struct snd_soc_dai_link *dai_link)
441 struct snd_soc_pcm_runtime *rtd;
448 dev = kzalloc(sizeof(struct device), GFP_KERNEL);
452 dev->parent = card->dev;
453 dev->release = soc_release_rtd_dev;
454 dev->groups = soc_dev_attr_groups;
456 dev_set_name(dev, "%s", dai_link->name);
458 ret = device_register(dev);
460 put_device(dev); /* soc_release_rtd_dev */
467 rtd = devm_kzalloc(dev, sizeof(*rtd), GFP_KERNEL);
472 dev_set_drvdata(dev, rtd);
475 * for rtd->codec_dais
477 rtd->codec_dais = devm_kcalloc(dev, dai_link->num_codecs,
478 sizeof(struct snd_soc_dai *),
480 if (!rtd->codec_dais)
484 * rtd remaining settings
486 INIT_LIST_HEAD(&rtd->component_list);
487 INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_PLAYBACK].be_clients);
488 INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_CAPTURE].be_clients);
489 INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_PLAYBACK].fe_clients);
490 INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_CAPTURE].fe_clients);
493 rtd->dai_link = dai_link;
494 if (!rtd->dai_link->ops)
495 rtd->dai_link->ops = &null_snd_soc_ops;
497 /* see for_each_card_rtds */
498 list_add_tail(&rtd->list, &card->rtd_list);
499 rtd->num = card->num_rtd;
505 soc_free_pcm_runtime(rtd);
509 static void snd_soc_flush_all_delayed_work(struct snd_soc_card *card)
511 struct snd_soc_pcm_runtime *rtd;
513 for_each_card_rtds(card, rtd)
514 flush_delayed_work(&rtd->delayed_work);
517 #ifdef CONFIG_PM_SLEEP
518 /* powers down audio subsystem for suspend */
519 int snd_soc_suspend(struct device *dev)
521 struct snd_soc_card *card = dev_get_drvdata(dev);
522 struct snd_soc_component *component;
523 struct snd_soc_pcm_runtime *rtd;
526 /* If the card is not initialized yet there is nothing to do */
527 if (!card->instantiated)
531 * Due to the resume being scheduled into a workqueue we could
532 * suspend before that's finished - wait for it to complete.
534 snd_power_wait(card->snd_card, SNDRV_CTL_POWER_D0);
536 /* we're going to block userspace touching us until resume completes */
537 snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D3hot);
539 /* mute any active DACs */
540 for_each_card_rtds(card, rtd) {
541 struct snd_soc_dai *dai;
543 if (rtd->dai_link->ignore_suspend)
546 for_each_rtd_codec_dai(rtd, i, dai) {
547 if (dai->playback_active)
548 snd_soc_dai_digital_mute(dai, 1,
549 SNDRV_PCM_STREAM_PLAYBACK);
553 /* suspend all pcms */
554 for_each_card_rtds(card, rtd) {
555 if (rtd->dai_link->ignore_suspend)
558 snd_pcm_suspend_all(rtd->pcm);
561 if (card->suspend_pre)
562 card->suspend_pre(card);
564 for_each_card_rtds(card, rtd) {
565 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
567 if (rtd->dai_link->ignore_suspend)
570 if (!cpu_dai->driver->bus_control)
571 snd_soc_dai_suspend(cpu_dai);
574 /* close any waiting streams */
575 snd_soc_flush_all_delayed_work(card);
577 for_each_card_rtds(card, rtd) {
579 if (rtd->dai_link->ignore_suspend)
582 snd_soc_dapm_stream_event(rtd,
583 SNDRV_PCM_STREAM_PLAYBACK,
584 SND_SOC_DAPM_STREAM_SUSPEND);
586 snd_soc_dapm_stream_event(rtd,
587 SNDRV_PCM_STREAM_CAPTURE,
588 SND_SOC_DAPM_STREAM_SUSPEND);
591 /* Recheck all endpoints too, their state is affected by suspend */
592 dapm_mark_endpoints_dirty(card);
593 snd_soc_dapm_sync(&card->dapm);
595 /* suspend all COMPONENTs */
596 for_each_card_components(card, component) {
597 struct snd_soc_dapm_context *dapm =
598 snd_soc_component_get_dapm(component);
601 * If there are paths active then the COMPONENT will be held
602 * with bias _ON and should not be suspended.
604 if (!snd_soc_component_is_suspended(component)) {
605 switch (snd_soc_dapm_get_bias_level(dapm)) {
606 case SND_SOC_BIAS_STANDBY:
608 * If the COMPONENT is capable of idle
609 * bias off then being in STANDBY
610 * means it's doing something,
611 * otherwise fall through.
613 if (dapm->idle_bias_off) {
614 dev_dbg(component->dev,
615 "ASoC: idle_bias_off CODEC on over suspend\n");
620 case SND_SOC_BIAS_OFF:
621 snd_soc_component_suspend(component);
622 if (component->regmap)
623 regcache_mark_dirty(component->regmap);
624 /* deactivate pins to sleep state */
625 pinctrl_pm_select_sleep_state(component->dev);
628 dev_dbg(component->dev,
629 "ASoC: COMPONENT is on over suspend\n");
635 for_each_card_rtds(card, rtd) {
636 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
638 if (rtd->dai_link->ignore_suspend)
641 if (cpu_dai->driver->bus_control)
642 snd_soc_dai_suspend(cpu_dai);
644 /* deactivate pins to sleep state */
645 pinctrl_pm_select_sleep_state(cpu_dai->dev);
648 if (card->suspend_post)
649 card->suspend_post(card);
653 EXPORT_SYMBOL_GPL(snd_soc_suspend);
656 * deferred resume work, so resume can complete before we finished
657 * setting our codec back up, which can be very slow on I2C
659 static void soc_resume_deferred(struct work_struct *work)
661 struct snd_soc_card *card =
662 container_of(work, struct snd_soc_card,
663 deferred_resume_work);
664 struct snd_soc_pcm_runtime *rtd;
665 struct snd_soc_component *component;
669 * our power state is still SNDRV_CTL_POWER_D3hot from suspend time,
670 * so userspace apps are blocked from touching us
673 dev_dbg(card->dev, "ASoC: starting resume work\n");
675 /* Bring us up into D2 so that DAPM starts enabling things */
676 snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D2);
678 if (card->resume_pre)
679 card->resume_pre(card);
681 /* resume control bus DAIs */
682 for_each_card_rtds(card, rtd) {
683 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
685 if (rtd->dai_link->ignore_suspend)
688 if (cpu_dai->driver->bus_control)
689 snd_soc_dai_resume(cpu_dai);
692 for_each_card_components(card, component) {
693 if (snd_soc_component_is_suspended(component))
694 snd_soc_component_resume(component);
697 for_each_card_rtds(card, rtd) {
699 if (rtd->dai_link->ignore_suspend)
702 snd_soc_dapm_stream_event(rtd,
703 SNDRV_PCM_STREAM_PLAYBACK,
704 SND_SOC_DAPM_STREAM_RESUME);
706 snd_soc_dapm_stream_event(rtd,
707 SNDRV_PCM_STREAM_CAPTURE,
708 SND_SOC_DAPM_STREAM_RESUME);
711 /* unmute any active DACs */
712 for_each_card_rtds(card, rtd) {
713 struct snd_soc_dai *dai;
715 if (rtd->dai_link->ignore_suspend)
718 for_each_rtd_codec_dai(rtd, i, dai) {
719 if (dai->playback_active)
720 snd_soc_dai_digital_mute(dai, 0,
721 SNDRV_PCM_STREAM_PLAYBACK);
725 for_each_card_rtds(card, rtd) {
726 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
728 if (rtd->dai_link->ignore_suspend)
731 if (!cpu_dai->driver->bus_control)
732 snd_soc_dai_resume(cpu_dai);
735 if (card->resume_post)
736 card->resume_post(card);
738 dev_dbg(card->dev, "ASoC: resume work completed\n");
740 /* Recheck all endpoints too, their state is affected by suspend */
741 dapm_mark_endpoints_dirty(card);
742 snd_soc_dapm_sync(&card->dapm);
744 /* userspace can access us now we are back as we were before */
745 snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D0);
748 /* powers up audio subsystem after a suspend */
749 int snd_soc_resume(struct device *dev)
751 struct snd_soc_card *card = dev_get_drvdata(dev);
752 bool bus_control = false;
753 struct snd_soc_pcm_runtime *rtd;
754 struct snd_soc_dai *codec_dai;
757 /* If the card is not initialized yet there is nothing to do */
758 if (!card->instantiated)
761 /* activate pins from sleep state */
762 for_each_card_rtds(card, rtd) {
763 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
766 pinctrl_pm_select_default_state(cpu_dai->dev);
768 for_each_rtd_codec_dai(rtd, i, codec_dai) {
769 if (codec_dai->active)
770 pinctrl_pm_select_default_state(codec_dai->dev);
775 * DAIs that also act as the control bus master might have other drivers
776 * hanging off them so need to resume immediately. Other drivers don't
777 * have that problem and may take a substantial amount of time to resume
778 * due to I/O costs and anti-pop so handle them out of line.
780 for_each_card_rtds(card, rtd) {
781 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
783 bus_control |= cpu_dai->driver->bus_control;
786 dev_dbg(dev, "ASoC: Resuming control bus master immediately\n");
787 soc_resume_deferred(&card->deferred_resume_work);
789 dev_dbg(dev, "ASoC: Scheduling resume work\n");
790 if (!schedule_work(&card->deferred_resume_work))
791 dev_err(dev, "ASoC: resume work item may be lost\n");
796 EXPORT_SYMBOL_GPL(snd_soc_resume);
798 static void soc_resume_init(struct snd_soc_card *card)
800 /* deferred resume work */
801 INIT_WORK(&card->deferred_resume_work, soc_resume_deferred);
804 #define snd_soc_suspend NULL
805 #define snd_soc_resume NULL
806 static inline void soc_resume_init(struct snd_soc_card *card)
811 static const struct snd_soc_dai_ops null_dai_ops = {
814 static struct device_node
815 *soc_component_to_node(struct snd_soc_component *component)
817 struct device_node *of_node;
819 of_node = component->dev->of_node;
820 if (!of_node && component->dev->parent)
821 of_node = component->dev->parent->of_node;
826 static int snd_soc_is_matching_component(
827 const struct snd_soc_dai_link_component *dlc,
828 struct snd_soc_component *component)
830 struct device_node *component_of_node;
835 component_of_node = soc_component_to_node(component);
837 if (dlc->of_node && component_of_node != dlc->of_node)
839 if (dlc->name && strcmp(component->name, dlc->name))
845 static struct snd_soc_component *soc_find_component(
846 const struct snd_soc_dai_link_component *dlc)
848 struct snd_soc_component *component;
850 lockdep_assert_held(&client_mutex);
855 * It returns *1st* found component, but some driver
856 * has few components by same of_node/name
858 * CPU component and generic DMAEngine component
860 for_each_component(component)
861 if (snd_soc_is_matching_component(dlc, component))
868 * snd_soc_find_dai - Find a registered DAI
870 * @dlc: name of the DAI or the DAI driver and optional component info to match
872 * This function will search all registered components and their DAIs to
873 * find the DAI of the same name. The component's of_node and name
874 * should also match if being specified.
876 * Return: pointer of DAI, or NULL if not found.
878 struct snd_soc_dai *snd_soc_find_dai(
879 const struct snd_soc_dai_link_component *dlc)
881 struct snd_soc_component *component;
882 struct snd_soc_dai *dai;
884 lockdep_assert_held(&client_mutex);
886 /* Find CPU DAI from registered DAIs */
887 for_each_component(component) {
888 if (!snd_soc_is_matching_component(dlc, component))
890 for_each_component_dais(component, dai) {
891 if (dlc->dai_name && strcmp(dai->name, dlc->dai_name)
892 && (!dai->driver->name
893 || strcmp(dai->driver->name, dlc->dai_name)))
902 EXPORT_SYMBOL_GPL(snd_soc_find_dai);
904 static int soc_dai_link_sanity_check(struct snd_soc_card *card,
905 struct snd_soc_dai_link *link)
908 struct snd_soc_dai_link_component *codec, *platform;
910 for_each_link_codecs(link, i, codec) {
912 * Codec must be specified by 1 of name or OF node,
913 * not both or neither.
915 if (!!codec->name == !!codec->of_node) {
916 dev_err(card->dev, "ASoC: Neither/both codec name/of_node are set for %s\n",
921 /* Codec DAI name must be specified */
922 if (!codec->dai_name) {
923 dev_err(card->dev, "ASoC: codec_dai_name not set for %s\n",
929 * Defer card registration if codec component is not added to
932 if (!soc_find_component(codec))
933 return -EPROBE_DEFER;
936 for_each_link_platforms(link, i, platform) {
938 * Platform may be specified by either name or OF node, but it
939 * can be left unspecified, then no components will be inserted
942 if (!!platform->name == !!platform->of_node) {
944 "ASoC: Neither/both platform name/of_node are set for %s\n",
950 * Defer card registration if platform component is not added to
953 if (!soc_find_component(platform))
954 return -EPROBE_DEFER;
958 if (link->num_cpus > 1) {
960 "ASoC: multi cpu is not yet supported %s\n",
966 * CPU device may be specified by either name or OF node, but
967 * can be left unspecified, and will be matched based on DAI
970 if (link->cpus->name && link->cpus->of_node) {
972 "ASoC: Neither/both cpu name/of_node are set for %s\n",
978 * Defer card registration if cpu dai component is not added to
981 if ((link->cpus->of_node || link->cpus->name) &&
982 !soc_find_component(link->cpus))
983 return -EPROBE_DEFER;
986 * At least one of CPU DAI name or CPU device name/node must be
989 if (!link->cpus->dai_name &&
990 !(link->cpus->name || link->cpus->of_node)) {
992 "ASoC: Neither cpu_dai_name nor cpu_name/of_node are set for %s\n",
1001 * snd_soc_remove_pcm_runtime - Remove a pcm_runtime from card
1002 * @card: The ASoC card to which the pcm_runtime has
1003 * @rtd: The pcm_runtime to remove
1005 * This function removes a pcm_runtime from the ASoC card.
1007 void snd_soc_remove_pcm_runtime(struct snd_soc_card *card,
1008 struct snd_soc_pcm_runtime *rtd)
1010 lockdep_assert_held(&client_mutex);
1013 * Notify the machine driver for extra destruction
1015 if (card->remove_dai_link)
1016 card->remove_dai_link(card, rtd->dai_link);
1018 soc_free_pcm_runtime(rtd);
1020 EXPORT_SYMBOL_GPL(snd_soc_remove_pcm_runtime);
1023 * snd_soc_add_pcm_runtime - Add a pcm_runtime dynamically via dai_link
1024 * @card: The ASoC card to which the pcm_runtime is added
1025 * @dai_link: The DAI link to find pcm_runtime
1027 * This function adds a pcm_runtime ASoC card by using dai_link.
1029 * Note: Topology can use this API to add pcm_runtime when probing the
1030 * topology component. And machine drivers can still define static
1031 * DAI links in dai_link array.
1033 int snd_soc_add_pcm_runtime(struct snd_soc_card *card,
1034 struct snd_soc_dai_link *dai_link)
1036 struct snd_soc_pcm_runtime *rtd;
1037 struct snd_soc_dai_link_component *codec, *platform;
1038 struct snd_soc_component *component;
1041 lockdep_assert_held(&client_mutex);
1044 * Notify the machine driver for extra initialization
1046 if (card->add_dai_link)
1047 card->add_dai_link(card, dai_link);
1049 if (dai_link->ignore)
1052 dev_dbg(card->dev, "ASoC: binding %s\n", dai_link->name);
1054 ret = soc_dai_link_sanity_check(card, dai_link);
1058 rtd = soc_new_pcm_runtime(card, dai_link);
1062 /* FIXME: we need multi CPU support in the future */
1063 rtd->cpu_dai = snd_soc_find_dai(dai_link->cpus);
1064 if (!rtd->cpu_dai) {
1065 dev_info(card->dev, "ASoC: CPU DAI %s not registered\n",
1066 dai_link->cpus->dai_name);
1069 snd_soc_rtdcom_add(rtd, rtd->cpu_dai->component);
1071 /* Find CODEC from registered CODECs */
1072 rtd->num_codecs = dai_link->num_codecs;
1073 for_each_link_codecs(dai_link, i, codec) {
1074 rtd->codec_dais[i] = snd_soc_find_dai(codec);
1075 if (!rtd->codec_dais[i]) {
1076 dev_info(card->dev, "ASoC: CODEC DAI %s not registered\n",
1081 snd_soc_rtdcom_add(rtd, rtd->codec_dais[i]->component);
1084 /* Single codec links expect codec and codec_dai in runtime data */
1085 rtd->codec_dai = rtd->codec_dais[0];
1087 /* Find PLATFORM from registered PLATFORMs */
1088 for_each_link_platforms(dai_link, i, platform) {
1089 for_each_component(component) {
1090 if (!snd_soc_is_matching_component(platform, component))
1093 snd_soc_rtdcom_add(rtd, component);
1100 snd_soc_remove_pcm_runtime(card, rtd);
1101 return -EPROBE_DEFER;
1103 EXPORT_SYMBOL_GPL(snd_soc_add_pcm_runtime);
1105 static int soc_dai_pcm_new(struct snd_soc_dai **dais, int num_dais,
1106 struct snd_soc_pcm_runtime *rtd)
1110 for (i = 0; i < num_dais; ++i) {
1111 struct snd_soc_dai_driver *drv = dais[i]->driver;
1114 ret = drv->pcm_new(rtd, dais[i]);
1116 dev_err(dais[i]->dev,
1117 "ASoC: Failed to bind %s with pcm device\n",
1126 static int soc_init_pcm_runtime(struct snd_soc_card *card,
1127 struct snd_soc_pcm_runtime *rtd)
1129 struct snd_soc_dai_link *dai_link = rtd->dai_link;
1130 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1131 struct snd_soc_rtdcom_list *rtdcom;
1132 struct snd_soc_component *component;
1135 /* set default power off timeout */
1136 rtd->pmdown_time = pmdown_time;
1138 /* do machine specific initialization */
1139 if (dai_link->init) {
1140 ret = dai_link->init(rtd);
1142 dev_err(card->dev, "ASoC: failed to init %s: %d\n",
1143 dai_link->name, ret);
1148 if (dai_link->dai_fmt) {
1149 ret = snd_soc_runtime_set_dai_fmt(rtd, dai_link->dai_fmt);
1154 /* add DPCM sysfs entries */
1155 soc_dpcm_debugfs_add(rtd);
1160 * most drivers will register their PCMs using DAI link ordering but
1161 * topology based drivers can use the DAI link id field to set PCM
1162 * device number and then use rtd + a base offset of the BEs.
1164 for_each_rtd_components(rtd, rtdcom, component) {
1165 if (!component->driver->use_dai_pcm_id)
1168 if (rtd->dai_link->no_pcm)
1169 num += component->driver->be_pcm_base;
1171 num = rtd->dai_link->id;
1174 /* create compress_device if possible */
1175 ret = snd_soc_dai_compress_new(cpu_dai, rtd, num);
1176 if (ret != -ENOTSUPP) {
1178 dev_err(card->dev, "ASoC: can't create compress %s\n",
1179 dai_link->stream_name);
1183 /* create the pcm */
1184 ret = soc_new_pcm(rtd, num);
1186 dev_err(card->dev, "ASoC: can't create pcm %s :%d\n",
1187 dai_link->stream_name, ret);
1190 ret = soc_dai_pcm_new(&cpu_dai, 1, rtd);
1193 ret = soc_dai_pcm_new(rtd->codec_dais,
1194 rtd->num_codecs, rtd);
1198 static void soc_set_of_name_prefix(struct snd_soc_component *component)
1200 struct device_node *of_node = soc_component_to_node(component);
1204 ret = of_property_read_string(of_node, "sound-name-prefix", &str);
1206 component->name_prefix = str;
1209 static void soc_set_name_prefix(struct snd_soc_card *card,
1210 struct snd_soc_component *component)
1212 struct device_node *of_node = soc_component_to_node(component);
1215 for (i = 0; i < card->num_configs; i++) {
1216 struct snd_soc_codec_conf *map = &card->codec_conf[i];
1218 if (map->of_node && of_node != map->of_node)
1220 if (map->dev_name && strcmp(component->name, map->dev_name))
1222 component->name_prefix = map->name_prefix;
1227 * If there is no configuration table or no match in the table,
1228 * check if a prefix is provided in the node
1230 soc_set_of_name_prefix(component);
1233 static void soc_remove_component(struct snd_soc_component *component,
1237 if (!component->card)
1241 snd_soc_component_remove(component);
1243 /* For framework level robustness */
1244 snd_soc_component_set_jack(component, NULL, NULL);
1246 list_del_init(&component->card_list);
1247 snd_soc_dapm_free(snd_soc_component_get_dapm(component));
1248 soc_cleanup_component_debugfs(component);
1249 component->card = NULL;
1250 snd_soc_component_module_put_when_remove(component);
1253 static int soc_probe_component(struct snd_soc_card *card,
1254 struct snd_soc_component *component)
1256 struct snd_soc_dapm_context *dapm =
1257 snd_soc_component_get_dapm(component);
1258 struct snd_soc_dai *dai;
1262 if (!strcmp(component->name, "snd-soc-dummy"))
1265 if (component->card) {
1266 if (component->card != card) {
1267 dev_err(component->dev,
1268 "Trying to bind component to card \"%s\" but is already bound to card \"%s\"\n",
1269 card->name, component->card->name);
1275 ret = snd_soc_component_module_get_when_probe(component);
1279 component->card = card;
1280 soc_set_name_prefix(card, component);
1282 soc_init_component_debugfs(component);
1284 snd_soc_dapm_init(dapm, card, component);
1286 ret = snd_soc_dapm_new_controls(dapm,
1287 component->driver->dapm_widgets,
1288 component->driver->num_dapm_widgets);
1291 dev_err(component->dev,
1292 "Failed to create new controls %d\n", ret);
1296 for_each_component_dais(component, dai) {
1297 ret = snd_soc_dapm_new_dai_widgets(dapm, dai);
1299 dev_err(component->dev,
1300 "Failed to create DAI widgets %d\n", ret);
1305 ret = snd_soc_component_probe(component);
1307 dev_err(component->dev,
1308 "ASoC: failed to probe component %d\n", ret);
1311 WARN(dapm->idle_bias_off &&
1312 dapm->bias_level != SND_SOC_BIAS_OFF,
1313 "codec %s can not start from non-off bias with idle_bias_off==1\n",
1317 /* machine specific init */
1318 if (component->init) {
1319 ret = component->init(component);
1321 dev_err(component->dev,
1322 "Failed to do machine specific init %d\n", ret);
1327 ret = snd_soc_add_component_controls(component,
1328 component->driver->controls,
1329 component->driver->num_controls);
1333 ret = snd_soc_dapm_add_routes(dapm,
1334 component->driver->dapm_routes,
1335 component->driver->num_dapm_routes);
1339 /* see for_each_card_components */
1340 list_add(&component->card_list, &card->component_dev_list);
1344 soc_remove_component(component, probed);
1349 static void soc_remove_dai(struct snd_soc_dai *dai, int order)
1353 if (!dai || !dai->probed || !dai->driver ||
1354 dai->driver->remove_order != order)
1357 err = snd_soc_dai_remove(dai);
1360 "ASoC: failed to remove %s: %d\n",
1366 static int soc_probe_dai(struct snd_soc_dai *dai, int order)
1371 dai->driver->probe_order != order)
1374 ret = snd_soc_dai_probe(dai);
1376 dev_err(dai->dev, "ASoC: failed to probe DAI %s: %d\n",
1386 static void soc_remove_link_dais(struct snd_soc_card *card)
1389 struct snd_soc_dai *codec_dai;
1390 struct snd_soc_pcm_runtime *rtd;
1393 for_each_comp_order(order) {
1394 for_each_card_rtds(card, rtd) {
1395 /* remove the CODEC DAI */
1396 for_each_rtd_codec_dai(rtd, i, codec_dai)
1397 soc_remove_dai(codec_dai, order);
1399 soc_remove_dai(rtd->cpu_dai, order);
1404 static int soc_probe_link_dais(struct snd_soc_card *card)
1406 struct snd_soc_dai *codec_dai;
1407 struct snd_soc_pcm_runtime *rtd;
1410 for_each_comp_order(order) {
1411 for_each_card_rtds(card, rtd) {
1414 "ASoC: probe %s dai link %d late %d\n",
1415 card->name, rtd->num, order);
1417 ret = soc_probe_dai(rtd->cpu_dai, order);
1421 /* probe the CODEC DAI */
1422 for_each_rtd_codec_dai(rtd, i, codec_dai) {
1423 ret = soc_probe_dai(codec_dai, order);
1433 static void soc_remove_link_components(struct snd_soc_card *card)
1435 struct snd_soc_component *component;
1436 struct snd_soc_pcm_runtime *rtd;
1437 struct snd_soc_rtdcom_list *rtdcom;
1440 for_each_comp_order(order) {
1441 for_each_card_rtds(card, rtd) {
1442 for_each_rtd_components(rtd, rtdcom, component) {
1443 if (component->driver->remove_order != order)
1446 soc_remove_component(component, 1);
1452 static int soc_probe_link_components(struct snd_soc_card *card)
1454 struct snd_soc_component *component;
1455 struct snd_soc_pcm_runtime *rtd;
1456 struct snd_soc_rtdcom_list *rtdcom;
1459 for_each_comp_order(order) {
1460 for_each_card_rtds(card, rtd) {
1461 for_each_rtd_components(rtd, rtdcom, component) {
1462 if (component->driver->probe_order != order)
1465 ret = soc_probe_component(card, component);
1475 static void soc_unbind_aux_dev(struct snd_soc_card *card)
1477 struct snd_soc_component *component, *_component;
1479 for_each_card_auxs_safe(card, component, _component) {
1480 component->init = NULL;
1481 list_del(&component->card_aux_list);
1485 static int soc_bind_aux_dev(struct snd_soc_card *card)
1487 struct snd_soc_component *component;
1488 struct snd_soc_aux_dev *aux;
1491 for_each_card_pre_auxs(card, i, aux) {
1492 /* codecs, usually analog devices */
1493 component = soc_find_component(&aux->dlc);
1495 return -EPROBE_DEFER;
1497 component->init = aux->init;
1498 /* see for_each_card_auxs */
1499 list_add(&component->card_aux_list, &card->aux_comp_list);
1504 static int soc_probe_aux_devices(struct snd_soc_card *card)
1506 struct snd_soc_component *component;
1510 for_each_comp_order(order) {
1511 for_each_card_auxs(card, component) {
1512 if (component->driver->probe_order != order)
1515 ret = soc_probe_component(card, component);
1524 static void soc_remove_aux_devices(struct snd_soc_card *card)
1526 struct snd_soc_component *comp, *_comp;
1529 for_each_comp_order(order) {
1530 for_each_card_auxs_safe(card, comp, _comp) {
1531 if (comp->driver->remove_order == order)
1532 soc_remove_component(comp, 1);
1538 * snd_soc_runtime_set_dai_fmt() - Change DAI link format for a ASoC runtime
1539 * @rtd: The runtime for which the DAI link format should be changed
1540 * @dai_fmt: The new DAI link format
1542 * This function updates the DAI link format for all DAIs connected to the DAI
1543 * link for the specified runtime.
1545 * Note: For setups with a static format set the dai_fmt field in the
1546 * corresponding snd_dai_link struct instead of using this function.
1548 * Returns 0 on success, otherwise a negative error code.
1550 int snd_soc_runtime_set_dai_fmt(struct snd_soc_pcm_runtime *rtd,
1551 unsigned int dai_fmt)
1553 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1554 struct snd_soc_dai *codec_dai;
1558 for_each_rtd_codec_dai(rtd, i, codec_dai) {
1559 ret = snd_soc_dai_set_fmt(codec_dai, dai_fmt);
1560 if (ret != 0 && ret != -ENOTSUPP) {
1561 dev_warn(codec_dai->dev,
1562 "ASoC: Failed to set DAI format: %d\n", ret);
1568 * Flip the polarity for the "CPU" end of a CODEC<->CODEC link
1569 * the component which has non_legacy_dai_naming is Codec
1571 if (cpu_dai->component->driver->non_legacy_dai_naming) {
1572 unsigned int inv_dai_fmt;
1574 inv_dai_fmt = dai_fmt & ~SND_SOC_DAIFMT_MASTER_MASK;
1575 switch (dai_fmt & SND_SOC_DAIFMT_MASTER_MASK) {
1576 case SND_SOC_DAIFMT_CBM_CFM:
1577 inv_dai_fmt |= SND_SOC_DAIFMT_CBS_CFS;
1579 case SND_SOC_DAIFMT_CBM_CFS:
1580 inv_dai_fmt |= SND_SOC_DAIFMT_CBS_CFM;
1582 case SND_SOC_DAIFMT_CBS_CFM:
1583 inv_dai_fmt |= SND_SOC_DAIFMT_CBM_CFS;
1585 case SND_SOC_DAIFMT_CBS_CFS:
1586 inv_dai_fmt |= SND_SOC_DAIFMT_CBM_CFM;
1590 dai_fmt = inv_dai_fmt;
1593 ret = snd_soc_dai_set_fmt(cpu_dai, dai_fmt);
1594 if (ret != 0 && ret != -ENOTSUPP) {
1595 dev_warn(cpu_dai->dev,
1596 "ASoC: Failed to set DAI format: %d\n", ret);
1602 EXPORT_SYMBOL_GPL(snd_soc_runtime_set_dai_fmt);
1606 * Trim special characters, and replace '-' with '_' since '-' is used to
1607 * separate different DMI fields in the card long name. Only number and
1608 * alphabet characters and a few separator characters are kept.
1610 static void cleanup_dmi_name(char *name)
1614 for (i = 0; name[i]; i++) {
1615 if (isalnum(name[i]) || (name[i] == '.')
1616 || (name[i] == '_'))
1617 name[j++] = name[i];
1618 else if (name[i] == '-')
1626 * Check if a DMI field is valid, i.e. not containing any string
1627 * in the black list.
1629 static int is_dmi_valid(const char *field)
1633 while (dmi_blacklist[i]) {
1634 if (strstr(field, dmi_blacklist[i]))
1643 * Append a string to card->dmi_longname with character cleanups.
1645 static void append_dmi_string(struct snd_soc_card *card, const char *str)
1647 char *dst = card->dmi_longname;
1648 size_t dst_len = sizeof(card->dmi_longname);
1652 snprintf(dst + len, dst_len - len, "-%s", str);
1654 len++; /* skip the separator "-" */
1656 cleanup_dmi_name(dst + len);
1660 * snd_soc_set_dmi_name() - Register DMI names to card
1661 * @card: The card to register DMI names
1662 * @flavour: The flavour "differentiator" for the card amongst its peers.
1664 * An Intel machine driver may be used by many different devices but are
1665 * difficult for userspace to differentiate, since machine drivers ususally
1666 * use their own name as the card short name and leave the card long name
1667 * blank. To differentiate such devices and fix bugs due to lack of
1668 * device-specific configurations, this function allows DMI info to be used
1669 * as the sound card long name, in the format of
1670 * "vendor-product-version-board"
1671 * (Character '-' is used to separate different DMI fields here).
1672 * This will help the user space to load the device-specific Use Case Manager
1673 * (UCM) configurations for the card.
1675 * Possible card long names may be:
1676 * DellInc.-XPS139343-01-0310JH
1677 * ASUSTeKCOMPUTERINC.-T100TA-1.0-T100TA
1678 * Circuitco-MinnowboardMaxD0PLATFORM-D0-MinnowBoardMAX
1680 * This function also supports flavoring the card longname to provide
1681 * the extra differentiation, like "vendor-product-version-board-flavor".
1683 * We only keep number and alphabet characters and a few separator characters
1684 * in the card long name since UCM in the user space uses the card long names
1685 * as card configuration directory names and AudoConf cannot support special
1686 * charactors like SPACE.
1688 * Returns 0 on success, otherwise a negative error code.
1690 int snd_soc_set_dmi_name(struct snd_soc_card *card, const char *flavour)
1692 const char *vendor, *product, *product_version, *board;
1694 if (card->long_name)
1695 return 0; /* long name already set by driver or from DMI */
1697 /* make up dmi long name as: vendor-product-version-board */
1698 vendor = dmi_get_system_info(DMI_BOARD_VENDOR);
1699 if (!vendor || !is_dmi_valid(vendor)) {
1700 dev_warn(card->dev, "ASoC: no DMI vendor name!\n");
1704 snprintf(card->dmi_longname, sizeof(card->dmi_longname), "%s", vendor);
1705 cleanup_dmi_name(card->dmi_longname);
1707 product = dmi_get_system_info(DMI_PRODUCT_NAME);
1708 if (product && is_dmi_valid(product)) {
1709 append_dmi_string(card, product);
1712 * some vendors like Lenovo may only put a self-explanatory
1713 * name in the product version field
1715 product_version = dmi_get_system_info(DMI_PRODUCT_VERSION);
1716 if (product_version && is_dmi_valid(product_version))
1717 append_dmi_string(card, product_version);
1720 board = dmi_get_system_info(DMI_BOARD_NAME);
1721 if (board && is_dmi_valid(board)) {
1722 if (!product || strcasecmp(board, product))
1723 append_dmi_string(card, board);
1724 } else if (!product) {
1725 /* fall back to using legacy name */
1726 dev_warn(card->dev, "ASoC: no DMI board/product name!\n");
1730 /* Add flavour to dmi long name */
1732 append_dmi_string(card, flavour);
1734 /* set the card long name */
1735 card->long_name = card->dmi_longname;
1739 EXPORT_SYMBOL_GPL(snd_soc_set_dmi_name);
1740 #endif /* CONFIG_DMI */
1742 static void soc_check_tplg_fes(struct snd_soc_card *card)
1744 struct snd_soc_component *component;
1745 const struct snd_soc_component_driver *comp_drv;
1746 struct snd_soc_dai_link *dai_link;
1749 for_each_component(component) {
1751 /* does this component override BEs ? */
1752 if (!component->driver->ignore_machine)
1755 /* for this machine ? */
1756 if (!strcmp(component->driver->ignore_machine,
1757 card->dev->driver->name))
1759 if (strcmp(component->driver->ignore_machine,
1760 dev_name(card->dev)))
1763 /* machine matches, so override the rtd data */
1764 for_each_card_prelinks(card, i, dai_link) {
1766 /* ignore this FE */
1767 if (dai_link->dynamic) {
1768 dai_link->ignore = true;
1772 dev_info(card->dev, "info: override BE DAI link %s\n",
1773 card->dai_link[i].name);
1775 /* override platform component */
1776 if (!dai_link->platforms) {
1777 dev_err(card->dev, "init platform error");
1780 dai_link->platforms->name = component->name;
1782 /* convert non BE into BE */
1783 dai_link->no_pcm = 1;
1785 /* override any BE fixups */
1786 dai_link->be_hw_params_fixup =
1787 component->driver->be_hw_params_fixup;
1790 * most BE links don't set stream name, so set it to
1791 * dai link name if it's NULL to help bind widgets.
1793 if (!dai_link->stream_name)
1794 dai_link->stream_name = dai_link->name;
1797 /* Inform userspace we are using alternate topology */
1798 if (component->driver->topology_name_prefix) {
1800 /* topology shortname created? */
1801 if (!card->topology_shortname_created) {
1802 comp_drv = component->driver;
1804 snprintf(card->topology_shortname, 32, "%s-%s",
1805 comp_drv->topology_name_prefix,
1807 card->topology_shortname_created = true;
1810 /* use topology shortname */
1811 card->name = card->topology_shortname;
1816 #define soc_setup_card_name(name, name1, name2, norm) \
1817 __soc_setup_card_name(name, sizeof(name), name1, name2, norm)
1818 static void __soc_setup_card_name(char *name, int len,
1819 const char *name1, const char *name2,
1824 snprintf(name, len, "%s", name1 ? name1 : name2);
1830 * Name normalization
1832 * The driver name is somewhat special, as it's used as a key for
1833 * searches in the user-space.
1836 * "abcd??efg" -> "abcd__efg"
1838 for (i = 0; i < len; i++) {
1845 if (!isalnum(name[i]))
1852 static void soc_cleanup_card_resources(struct snd_soc_card *card,
1855 struct snd_soc_pcm_runtime *rtd, *n;
1858 snd_card_disconnect_sync(card->snd_card);
1860 snd_soc_dapm_shutdown(card);
1862 /* remove and free each DAI */
1863 soc_remove_link_dais(card);
1864 soc_remove_link_components(card);
1866 for_each_card_rtds_safe(card, rtd, n)
1867 snd_soc_remove_pcm_runtime(card, rtd);
1869 /* remove auxiliary devices */
1870 soc_remove_aux_devices(card);
1871 soc_unbind_aux_dev(card);
1873 snd_soc_dapm_free(&card->dapm);
1874 soc_cleanup_card_debugfs(card);
1876 /* remove the card */
1877 if (card_probed && card->remove)
1880 if (card->snd_card) {
1881 snd_card_free(card->snd_card);
1882 card->snd_card = NULL;
1886 static void snd_soc_unbind_card(struct snd_soc_card *card, bool unregister)
1888 if (card->instantiated) {
1889 int card_probed = 1;
1891 card->instantiated = false;
1892 snd_soc_flush_all_delayed_work(card);
1894 soc_cleanup_card_resources(card, card_probed);
1896 list_add(&card->list, &unbind_card_list);
1899 list_del(&card->list);
1903 static int snd_soc_bind_card(struct snd_soc_card *card)
1905 struct snd_soc_pcm_runtime *rtd;
1906 struct snd_soc_dai_link *dai_link;
1907 int ret, i, card_probed = 0;
1909 mutex_lock(&client_mutex);
1910 mutex_lock_nested(&card->mutex, SND_SOC_CARD_CLASS_INIT);
1912 snd_soc_dapm_init(&card->dapm, card, NULL);
1914 /* check whether any platform is ignore machine FE and using topology */
1915 soc_check_tplg_fes(card);
1917 /* bind aux_devs too */
1918 ret = soc_bind_aux_dev(card);
1922 /* add predefined DAI links to the list */
1924 for_each_card_prelinks(card, i, dai_link) {
1925 ret = snd_soc_add_pcm_runtime(card, dai_link);
1930 /* card bind complete so register a sound card */
1931 ret = snd_card_new(card->dev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1,
1932 card->owner, 0, &card->snd_card);
1935 "ASoC: can't create sound card for card %s: %d\n",
1940 soc_init_card_debugfs(card);
1942 soc_resume_init(card);
1944 ret = snd_soc_dapm_new_controls(&card->dapm, card->dapm_widgets,
1945 card->num_dapm_widgets);
1949 ret = snd_soc_dapm_new_controls(&card->dapm, card->of_dapm_widgets,
1950 card->num_of_dapm_widgets);
1954 /* initialise the sound card only once */
1956 ret = card->probe(card);
1962 /* probe all components used by DAI links on this card */
1963 ret = soc_probe_link_components(card);
1966 "ASoC: failed to instantiate card %d\n", ret);
1970 /* probe auxiliary components */
1971 ret = soc_probe_aux_devices(card);
1974 "ASoC: failed to probe aux component %d\n", ret);
1978 /* probe all DAI links on this card */
1979 ret = soc_probe_link_dais(card);
1982 "ASoC: failed to instantiate card %d\n", ret);
1986 for_each_card_rtds(card, rtd) {
1987 ret = soc_init_pcm_runtime(card, rtd);
1992 snd_soc_dapm_link_dai_widgets(card);
1993 snd_soc_dapm_connect_dai_link_widgets(card);
1995 ret = snd_soc_add_card_controls(card, card->controls,
1996 card->num_controls);
2000 ret = snd_soc_dapm_add_routes(&card->dapm, card->dapm_routes,
2001 card->num_dapm_routes);
2005 ret = snd_soc_dapm_add_routes(&card->dapm, card->of_dapm_routes,
2006 card->num_of_dapm_routes);
2010 /* try to set some sane longname if DMI is available */
2011 snd_soc_set_dmi_name(card, NULL);
2013 soc_setup_card_name(card->snd_card->shortname,
2014 card->name, NULL, 0);
2015 soc_setup_card_name(card->snd_card->longname,
2016 card->long_name, card->name, 0);
2017 soc_setup_card_name(card->snd_card->driver,
2018 card->driver_name, card->name, 1);
2020 if (card->components) {
2021 /* the current implementation of snd_component_add() accepts */
2022 /* multiple components in the string separated by space, */
2023 /* but the string collision (identical string) check might */
2024 /* not work correctly */
2025 ret = snd_component_add(card->snd_card, card->components);
2027 dev_err(card->dev, "ASoC: %s snd_component_add() failed: %d\n",
2033 if (card->late_probe) {
2034 ret = card->late_probe(card);
2036 dev_err(card->dev, "ASoC: %s late_probe() failed: %d\n",
2043 snd_soc_dapm_new_widgets(card);
2045 ret = snd_card_register(card->snd_card);
2047 dev_err(card->dev, "ASoC: failed to register soundcard %d\n",
2052 card->instantiated = 1;
2053 dapm_mark_endpoints_dirty(card);
2054 snd_soc_dapm_sync(&card->dapm);
2056 /* deactivate pins to sleep state */
2057 for_each_card_rtds(card, rtd) {
2058 struct snd_soc_dai *dai;
2060 for_each_rtd_codec_dai(rtd, i, dai) {
2062 pinctrl_pm_select_sleep_state(dai->dev);
2065 if (!rtd->cpu_dai->active)
2066 pinctrl_pm_select_sleep_state(rtd->cpu_dai->dev);
2071 soc_cleanup_card_resources(card, card_probed);
2073 mutex_unlock(&card->mutex);
2074 mutex_unlock(&client_mutex);
2079 /* probes a new socdev */
2080 static int soc_probe(struct platform_device *pdev)
2082 struct snd_soc_card *card = platform_get_drvdata(pdev);
2085 * no card, so machine driver should be registering card
2086 * we should not be here in that case so ret error
2091 dev_warn(&pdev->dev,
2092 "ASoC: machine %s should use snd_soc_register_card()\n",
2095 /* Bodge while we unpick instantiation */
2096 card->dev = &pdev->dev;
2098 return snd_soc_register_card(card);
2101 /* removes a socdev */
2102 static int soc_remove(struct platform_device *pdev)
2104 struct snd_soc_card *card = platform_get_drvdata(pdev);
2106 snd_soc_unregister_card(card);
2110 int snd_soc_poweroff(struct device *dev)
2112 struct snd_soc_card *card = dev_get_drvdata(dev);
2113 struct snd_soc_pcm_runtime *rtd;
2115 if (!card->instantiated)
2119 * Flush out pmdown_time work - we actually do want to run it
2120 * now, we're shutting down so no imminent restart.
2122 snd_soc_flush_all_delayed_work(card);
2124 snd_soc_dapm_shutdown(card);
2126 /* deactivate pins to sleep state */
2127 for_each_card_rtds(card, rtd) {
2128 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
2129 struct snd_soc_dai *codec_dai;
2132 pinctrl_pm_select_sleep_state(cpu_dai->dev);
2133 for_each_rtd_codec_dai(rtd, i, codec_dai) {
2134 pinctrl_pm_select_sleep_state(codec_dai->dev);
2140 EXPORT_SYMBOL_GPL(snd_soc_poweroff);
2142 const struct dev_pm_ops snd_soc_pm_ops = {
2143 .suspend = snd_soc_suspend,
2144 .resume = snd_soc_resume,
2145 .freeze = snd_soc_suspend,
2146 .thaw = snd_soc_resume,
2147 .poweroff = snd_soc_poweroff,
2148 .restore = snd_soc_resume,
2150 EXPORT_SYMBOL_GPL(snd_soc_pm_ops);
2152 /* ASoC platform driver */
2153 static struct platform_driver soc_driver = {
2155 .name = "soc-audio",
2156 .pm = &snd_soc_pm_ops,
2159 .remove = soc_remove,
2163 * snd_soc_cnew - create new control
2164 * @_template: control template
2165 * @data: control private data
2166 * @long_name: control long name
2167 * @prefix: control name prefix
2169 * Create a new mixer control from a template control.
2171 * Returns 0 for success, else error.
2173 struct snd_kcontrol *snd_soc_cnew(const struct snd_kcontrol_new *_template,
2174 void *data, const char *long_name,
2177 struct snd_kcontrol_new template;
2178 struct snd_kcontrol *kcontrol;
2181 memcpy(&template, _template, sizeof(template));
2185 long_name = template.name;
2188 name = kasprintf(GFP_KERNEL, "%s %s", prefix, long_name);
2192 template.name = name;
2194 template.name = long_name;
2197 kcontrol = snd_ctl_new1(&template, data);
2203 EXPORT_SYMBOL_GPL(snd_soc_cnew);
2205 static int snd_soc_add_controls(struct snd_card *card, struct device *dev,
2206 const struct snd_kcontrol_new *controls, int num_controls,
2207 const char *prefix, void *data)
2211 for (i = 0; i < num_controls; i++) {
2212 const struct snd_kcontrol_new *control = &controls[i];
2214 err = snd_ctl_add(card, snd_soc_cnew(control, data,
2215 control->name, prefix));
2217 dev_err(dev, "ASoC: Failed to add %s: %d\n",
2218 control->name, err);
2226 struct snd_kcontrol *snd_soc_card_get_kcontrol(struct snd_soc_card *soc_card,
2229 struct snd_card *card = soc_card->snd_card;
2230 struct snd_kcontrol *kctl;
2232 if (unlikely(!name))
2235 list_for_each_entry(kctl, &card->controls, list)
2236 if (!strncmp(kctl->id.name, name, sizeof(kctl->id.name)))
2240 EXPORT_SYMBOL_GPL(snd_soc_card_get_kcontrol);
2243 * snd_soc_add_component_controls - Add an array of controls to a component.
2245 * @component: Component to add controls to
2246 * @controls: Array of controls to add
2247 * @num_controls: Number of elements in the array
2249 * Return: 0 for success, else error.
2251 int snd_soc_add_component_controls(struct snd_soc_component *component,
2252 const struct snd_kcontrol_new *controls, unsigned int num_controls)
2254 struct snd_card *card = component->card->snd_card;
2256 return snd_soc_add_controls(card, component->dev, controls,
2257 num_controls, component->name_prefix, component);
2259 EXPORT_SYMBOL_GPL(snd_soc_add_component_controls);
2262 * snd_soc_add_card_controls - add an array of controls to a SoC card.
2263 * Convenience function to add a list of controls.
2265 * @soc_card: SoC card to add controls to
2266 * @controls: array of controls to add
2267 * @num_controls: number of elements in the array
2269 * Return 0 for success, else error.
2271 int snd_soc_add_card_controls(struct snd_soc_card *soc_card,
2272 const struct snd_kcontrol_new *controls, int num_controls)
2274 struct snd_card *card = soc_card->snd_card;
2276 return snd_soc_add_controls(card, soc_card->dev, controls, num_controls,
2279 EXPORT_SYMBOL_GPL(snd_soc_add_card_controls);
2282 * snd_soc_add_dai_controls - add an array of controls to a DAI.
2283 * Convienience function to add a list of controls.
2285 * @dai: DAI to add controls to
2286 * @controls: array of controls to add
2287 * @num_controls: number of elements in the array
2289 * Return 0 for success, else error.
2291 int snd_soc_add_dai_controls(struct snd_soc_dai *dai,
2292 const struct snd_kcontrol_new *controls, int num_controls)
2294 struct snd_card *card = dai->component->card->snd_card;
2296 return snd_soc_add_controls(card, dai->dev, controls, num_controls,
2299 EXPORT_SYMBOL_GPL(snd_soc_add_dai_controls);
2302 * snd_soc_register_card - Register a card with the ASoC core
2304 * @card: Card to register
2307 int snd_soc_register_card(struct snd_soc_card *card)
2309 if (!card->name || !card->dev)
2312 dev_set_drvdata(card->dev, card);
2314 INIT_LIST_HEAD(&card->widgets);
2315 INIT_LIST_HEAD(&card->paths);
2316 INIT_LIST_HEAD(&card->dapm_list);
2317 INIT_LIST_HEAD(&card->aux_comp_list);
2318 INIT_LIST_HEAD(&card->component_dev_list);
2319 INIT_LIST_HEAD(&card->list);
2320 INIT_LIST_HEAD(&card->rtd_list);
2321 INIT_LIST_HEAD(&card->dapm_dirty);
2322 INIT_LIST_HEAD(&card->dobj_list);
2324 card->instantiated = 0;
2325 mutex_init(&card->mutex);
2326 mutex_init(&card->dapm_mutex);
2327 mutex_init(&card->pcm_mutex);
2328 spin_lock_init(&card->dpcm_lock);
2330 return snd_soc_bind_card(card);
2332 EXPORT_SYMBOL_GPL(snd_soc_register_card);
2335 * snd_soc_unregister_card - Unregister a card with the ASoC core
2337 * @card: Card to unregister
2340 int snd_soc_unregister_card(struct snd_soc_card *card)
2342 mutex_lock(&client_mutex);
2343 snd_soc_unbind_card(card, true);
2344 mutex_unlock(&client_mutex);
2345 dev_dbg(card->dev, "ASoC: Unregistered card '%s'\n", card->name);
2349 EXPORT_SYMBOL_GPL(snd_soc_unregister_card);
2352 * Simplify DAI link configuration by removing ".-1" from device names
2353 * and sanitizing names.
2355 static char *fmt_single_name(struct device *dev, int *id)
2357 char *found, name[NAME_SIZE];
2360 if (dev_name(dev) == NULL)
2363 strlcpy(name, dev_name(dev), NAME_SIZE);
2365 /* are we a "%s.%d" name (platform and SPI components) */
2366 found = strstr(name, dev->driver->name);
2369 if (sscanf(&found[strlen(dev->driver->name)], ".%d", id) == 1) {
2371 /* discard ID from name if ID == -1 */
2373 found[strlen(dev->driver->name)] = '\0';
2377 /* I2C component devices are named "bus-addr" */
2378 if (sscanf(name, "%x-%x", &id1, &id2) == 2) {
2379 char tmp[NAME_SIZE];
2381 /* create unique ID number from I2C addr and bus */
2382 *id = ((id1 & 0xffff) << 16) + id2;
2384 /* sanitize component name for DAI link creation */
2385 snprintf(tmp, NAME_SIZE, "%s.%s", dev->driver->name,
2387 strlcpy(name, tmp, NAME_SIZE);
2392 return devm_kstrdup(dev, name, GFP_KERNEL);
2396 * Simplify DAI link naming for single devices with multiple DAIs by removing
2397 * any ".-1" and using the DAI name (instead of device name).
2399 static inline char *fmt_multiple_name(struct device *dev,
2400 struct snd_soc_dai_driver *dai_drv)
2402 if (dai_drv->name == NULL) {
2404 "ASoC: error - multiple DAI %s registered with no name\n",
2409 return devm_kstrdup(dev, dai_drv->name, GFP_KERNEL);
2412 void snd_soc_unregister_dai(struct snd_soc_dai *dai)
2414 dev_dbg(dai->dev, "ASoC: Unregistered DAI '%s'\n", dai->name);
2415 list_del(&dai->list);
2417 EXPORT_SYMBOL_GPL(snd_soc_unregister_dai);
2420 * snd_soc_register_dai - Register a DAI dynamically & create its widgets
2422 * @component: The component the DAIs are registered for
2423 * @dai_drv: DAI driver to use for the DAI
2424 * @legacy_dai_naming: if %true, use legacy single-name format;
2425 * if %false, use multiple-name format;
2427 * Topology can use this API to register DAIs when probing a component.
2428 * These DAIs's widgets will be freed in the card cleanup and the DAIs
2429 * will be freed in the component cleanup.
2431 struct snd_soc_dai *snd_soc_register_dai(struct snd_soc_component *component,
2432 struct snd_soc_dai_driver *dai_drv,
2433 bool legacy_dai_naming)
2435 struct device *dev = component->dev;
2436 struct snd_soc_dai *dai;
2438 dev_dbg(dev, "ASoC: dynamically register DAI %s\n", dev_name(dev));
2440 lockdep_assert_held(&client_mutex);
2442 dai = devm_kzalloc(dev, sizeof(*dai), GFP_KERNEL);
2447 * Back in the old days when we still had component-less DAIs,
2448 * instead of having a static name, component-less DAIs would
2449 * inherit the name of the parent device so it is possible to
2450 * register multiple instances of the DAI. We still need to keep
2451 * the same naming style even though those DAIs are not
2452 * component-less anymore.
2454 if (legacy_dai_naming &&
2455 (dai_drv->id == 0 || dai_drv->name == NULL)) {
2456 dai->name = fmt_single_name(dev, &dai->id);
2458 dai->name = fmt_multiple_name(dev, dai_drv);
2460 dai->id = dai_drv->id;
2462 dai->id = component->num_dai;
2467 dai->component = component;
2469 dai->driver = dai_drv;
2470 if (!dai->driver->ops)
2471 dai->driver->ops = &null_dai_ops;
2473 /* see for_each_component_dais */
2474 list_add_tail(&dai->list, &component->dai_list);
2475 component->num_dai++;
2477 dev_dbg(dev, "ASoC: Registered DAI '%s'\n", dai->name);
2482 * snd_soc_unregister_dai - Unregister DAIs from the ASoC core
2484 * @component: The component for which the DAIs should be unregistered
2486 static void snd_soc_unregister_dais(struct snd_soc_component *component)
2488 struct snd_soc_dai *dai, *_dai;
2490 for_each_component_dais_safe(component, dai, _dai)
2491 snd_soc_unregister_dai(dai);
2495 * snd_soc_register_dais - Register a DAI with the ASoC core
2497 * @component: The component the DAIs are registered for
2498 * @dai_drv: DAI driver to use for the DAIs
2499 * @count: Number of DAIs
2501 static int snd_soc_register_dais(struct snd_soc_component *component,
2502 struct snd_soc_dai_driver *dai_drv,
2505 struct snd_soc_dai *dai;
2509 for (i = 0; i < count; i++) {
2510 dai = snd_soc_register_dai(component, dai_drv + i, count == 1 &&
2511 !component->driver->non_legacy_dai_naming);
2521 snd_soc_unregister_dais(component);
2526 static int snd_soc_component_initialize(struct snd_soc_component *component,
2527 const struct snd_soc_component_driver *driver, struct device *dev)
2529 INIT_LIST_HEAD(&component->dai_list);
2530 INIT_LIST_HEAD(&component->dobj_list);
2531 INIT_LIST_HEAD(&component->card_list);
2532 mutex_init(&component->io_mutex);
2534 component->name = fmt_single_name(dev, &component->id);
2535 if (!component->name) {
2536 dev_err(dev, "ASoC: Failed to allocate name\n");
2540 component->dev = dev;
2541 component->driver = driver;
2546 static void snd_soc_component_setup_regmap(struct snd_soc_component *component)
2548 int val_bytes = regmap_get_val_bytes(component->regmap);
2550 /* Errors are legitimate for non-integer byte multiples */
2552 component->val_bytes = val_bytes;
2555 #ifdef CONFIG_REGMAP
2558 * snd_soc_component_init_regmap() - Initialize regmap instance for the
2560 * @component: The component for which to initialize the regmap instance
2561 * @regmap: The regmap instance that should be used by the component
2563 * This function allows deferred assignment of the regmap instance that is
2564 * associated with the component. Only use this if the regmap instance is not
2565 * yet ready when the component is registered. The function must also be called
2566 * before the first IO attempt of the component.
2568 void snd_soc_component_init_regmap(struct snd_soc_component *component,
2569 struct regmap *regmap)
2571 component->regmap = regmap;
2572 snd_soc_component_setup_regmap(component);
2574 EXPORT_SYMBOL_GPL(snd_soc_component_init_regmap);
2577 * snd_soc_component_exit_regmap() - De-initialize regmap instance for the
2579 * @component: The component for which to de-initialize the regmap instance
2581 * Calls regmap_exit() on the regmap instance associated to the component and
2582 * removes the regmap instance from the component.
2584 * This function should only be used if snd_soc_component_init_regmap() was used
2585 * to initialize the regmap instance.
2587 void snd_soc_component_exit_regmap(struct snd_soc_component *component)
2589 regmap_exit(component->regmap);
2590 component->regmap = NULL;
2592 EXPORT_SYMBOL_GPL(snd_soc_component_exit_regmap);
2596 #define ENDIANNESS_MAP(name) \
2597 (SNDRV_PCM_FMTBIT_##name##LE | SNDRV_PCM_FMTBIT_##name##BE)
2598 static u64 endianness_format_map[] = {
2599 ENDIANNESS_MAP(S16_),
2600 ENDIANNESS_MAP(U16_),
2601 ENDIANNESS_MAP(S24_),
2602 ENDIANNESS_MAP(U24_),
2603 ENDIANNESS_MAP(S32_),
2604 ENDIANNESS_MAP(U32_),
2605 ENDIANNESS_MAP(S24_3),
2606 ENDIANNESS_MAP(U24_3),
2607 ENDIANNESS_MAP(S20_3),
2608 ENDIANNESS_MAP(U20_3),
2609 ENDIANNESS_MAP(S18_3),
2610 ENDIANNESS_MAP(U18_3),
2611 ENDIANNESS_MAP(FLOAT_),
2612 ENDIANNESS_MAP(FLOAT64_),
2613 ENDIANNESS_MAP(IEC958_SUBFRAME_),
2617 * Fix up the DAI formats for endianness: codecs don't actually see
2618 * the endianness of the data but we're using the CPU format
2619 * definitions which do need to include endianness so we ensure that
2620 * codec DAIs always have both big and little endian variants set.
2622 static void convert_endianness_formats(struct snd_soc_pcm_stream *stream)
2626 for (i = 0; i < ARRAY_SIZE(endianness_format_map); i++)
2627 if (stream->formats & endianness_format_map[i])
2628 stream->formats |= endianness_format_map[i];
2631 static void snd_soc_try_rebind_card(void)
2633 struct snd_soc_card *card, *c;
2635 list_for_each_entry_safe(card, c, &unbind_card_list, list)
2636 if (!snd_soc_bind_card(card))
2637 list_del(&card->list);
2640 static void snd_soc_del_component_unlocked(struct snd_soc_component *component)
2642 struct snd_soc_card *card = component->card;
2644 snd_soc_unregister_dais(component);
2647 snd_soc_unbind_card(card, false);
2649 list_del(&component->list);
2652 int snd_soc_add_component(struct device *dev,
2653 struct snd_soc_component *component,
2654 const struct snd_soc_component_driver *component_driver,
2655 struct snd_soc_dai_driver *dai_drv,
2661 mutex_lock(&client_mutex);
2663 ret = snd_soc_component_initialize(component, component_driver, dev);
2667 if (component_driver->endianness) {
2668 for (i = 0; i < num_dai; i++) {
2669 convert_endianness_formats(&dai_drv[i].playback);
2670 convert_endianness_formats(&dai_drv[i].capture);
2674 ret = snd_soc_register_dais(component, dai_drv, num_dai);
2676 dev_err(dev, "ASoC: Failed to register DAIs: %d\n", ret);
2680 if (!component->driver->write && !component->driver->read) {
2681 if (!component->regmap)
2682 component->regmap = dev_get_regmap(component->dev,
2684 if (component->regmap)
2685 snd_soc_component_setup_regmap(component);
2688 /* see for_each_component */
2689 list_add(&component->list, &component_list);
2693 snd_soc_del_component_unlocked(component);
2695 mutex_unlock(&client_mutex);
2698 snd_soc_try_rebind_card();
2702 EXPORT_SYMBOL_GPL(snd_soc_add_component);
2704 int snd_soc_register_component(struct device *dev,
2705 const struct snd_soc_component_driver *component_driver,
2706 struct snd_soc_dai_driver *dai_drv,
2709 struct snd_soc_component *component;
2711 component = devm_kzalloc(dev, sizeof(*component), GFP_KERNEL);
2715 return snd_soc_add_component(dev, component, component_driver,
2718 EXPORT_SYMBOL_GPL(snd_soc_register_component);
2721 * snd_soc_unregister_component - Unregister all related component
2722 * from the ASoC core
2724 * @dev: The device to unregister
2726 void snd_soc_unregister_component(struct device *dev)
2728 struct snd_soc_component *component;
2730 mutex_lock(&client_mutex);
2732 component = snd_soc_lookup_component_nolocked(dev, NULL);
2736 snd_soc_del_component_unlocked(component);
2738 mutex_unlock(&client_mutex);
2740 EXPORT_SYMBOL_GPL(snd_soc_unregister_component);
2742 /* Retrieve a card's name from device tree */
2743 int snd_soc_of_parse_card_name(struct snd_soc_card *card,
2744 const char *propname)
2746 struct device_node *np;
2750 pr_err("card->dev is not set before calling %s\n", __func__);
2754 np = card->dev->of_node;
2756 ret = of_property_read_string_index(np, propname, 0, &card->name);
2758 * EINVAL means the property does not exist. This is fine providing
2759 * card->name was previously set, which is checked later in
2760 * snd_soc_register_card.
2762 if (ret < 0 && ret != -EINVAL) {
2764 "ASoC: Property '%s' could not be read: %d\n",
2771 EXPORT_SYMBOL_GPL(snd_soc_of_parse_card_name);
2773 static const struct snd_soc_dapm_widget simple_widgets[] = {
2774 SND_SOC_DAPM_MIC("Microphone", NULL),
2775 SND_SOC_DAPM_LINE("Line", NULL),
2776 SND_SOC_DAPM_HP("Headphone", NULL),
2777 SND_SOC_DAPM_SPK("Speaker", NULL),
2780 int snd_soc_of_parse_audio_simple_widgets(struct snd_soc_card *card,
2781 const char *propname)
2783 struct device_node *np = card->dev->of_node;
2784 struct snd_soc_dapm_widget *widgets;
2785 const char *template, *wname;
2786 int i, j, num_widgets, ret;
2788 num_widgets = of_property_count_strings(np, propname);
2789 if (num_widgets < 0) {
2791 "ASoC: Property '%s' does not exist\n", propname);
2794 if (num_widgets & 1) {
2796 "ASoC: Property '%s' length is not even\n", propname);
2802 dev_err(card->dev, "ASoC: Property '%s's length is zero\n",
2807 widgets = devm_kcalloc(card->dev, num_widgets, sizeof(*widgets),
2811 "ASoC: Could not allocate memory for widgets\n");
2815 for (i = 0; i < num_widgets; i++) {
2816 ret = of_property_read_string_index(np, propname,
2820 "ASoC: Property '%s' index %d read error:%d\n",
2821 propname, 2 * i, ret);
2825 for (j = 0; j < ARRAY_SIZE(simple_widgets); j++) {
2826 if (!strncmp(template, simple_widgets[j].name,
2827 strlen(simple_widgets[j].name))) {
2828 widgets[i] = simple_widgets[j];
2833 if (j >= ARRAY_SIZE(simple_widgets)) {
2835 "ASoC: DAPM widget '%s' is not supported\n",
2840 ret = of_property_read_string_index(np, propname,
2845 "ASoC: Property '%s' index %d read error:%d\n",
2846 propname, (2 * i) + 1, ret);
2850 widgets[i].name = wname;
2853 card->of_dapm_widgets = widgets;
2854 card->num_of_dapm_widgets = num_widgets;
2858 EXPORT_SYMBOL_GPL(snd_soc_of_parse_audio_simple_widgets);
2860 int snd_soc_of_get_slot_mask(struct device_node *np,
2861 const char *prop_name,
2865 const __be32 *of_slot_mask = of_get_property(np, prop_name, &val);
2871 for (i = 0; i < val; i++)
2872 if (be32_to_cpup(&of_slot_mask[i]))
2877 EXPORT_SYMBOL_GPL(snd_soc_of_get_slot_mask);
2879 int snd_soc_of_parse_tdm_slot(struct device_node *np,
2880 unsigned int *tx_mask,
2881 unsigned int *rx_mask,
2882 unsigned int *slots,
2883 unsigned int *slot_width)
2889 snd_soc_of_get_slot_mask(np, "dai-tdm-slot-tx-mask", tx_mask);
2891 snd_soc_of_get_slot_mask(np, "dai-tdm-slot-rx-mask", rx_mask);
2893 if (of_property_read_bool(np, "dai-tdm-slot-num")) {
2894 ret = of_property_read_u32(np, "dai-tdm-slot-num", &val);
2902 if (of_property_read_bool(np, "dai-tdm-slot-width")) {
2903 ret = of_property_read_u32(np, "dai-tdm-slot-width", &val);
2913 EXPORT_SYMBOL_GPL(snd_soc_of_parse_tdm_slot);
2915 void snd_soc_of_parse_node_prefix(struct device_node *np,
2916 struct snd_soc_codec_conf *codec_conf,
2917 struct device_node *of_node,
2918 const char *propname)
2923 ret = of_property_read_string(np, propname, &str);
2925 /* no prefix is not error */
2929 codec_conf->of_node = of_node;
2930 codec_conf->name_prefix = str;
2932 EXPORT_SYMBOL_GPL(snd_soc_of_parse_node_prefix);
2934 int snd_soc_of_parse_audio_routing(struct snd_soc_card *card,
2935 const char *propname)
2937 struct device_node *np = card->dev->of_node;
2939 struct snd_soc_dapm_route *routes;
2942 num_routes = of_property_count_strings(np, propname);
2943 if (num_routes < 0 || num_routes & 1) {
2945 "ASoC: Property '%s' does not exist or its length is not even\n",
2951 dev_err(card->dev, "ASoC: Property '%s's length is zero\n",
2956 routes = devm_kcalloc(card->dev, num_routes, sizeof(*routes),
2960 "ASoC: Could not allocate DAPM route table\n");
2964 for (i = 0; i < num_routes; i++) {
2965 ret = of_property_read_string_index(np, propname,
2966 2 * i, &routes[i].sink);
2969 "ASoC: Property '%s' index %d could not be read: %d\n",
2970 propname, 2 * i, ret);
2973 ret = of_property_read_string_index(np, propname,
2974 (2 * i) + 1, &routes[i].source);
2977 "ASoC: Property '%s' index %d could not be read: %d\n",
2978 propname, (2 * i) + 1, ret);
2983 card->num_of_dapm_routes = num_routes;
2984 card->of_dapm_routes = routes;
2988 EXPORT_SYMBOL_GPL(snd_soc_of_parse_audio_routing);
2990 unsigned int snd_soc_of_parse_daifmt(struct device_node *np,
2992 struct device_node **bitclkmaster,
2993 struct device_node **framemaster)
2997 unsigned int format = 0;
3003 } of_fmt_table[] = {
3004 { "i2s", SND_SOC_DAIFMT_I2S },
3005 { "right_j", SND_SOC_DAIFMT_RIGHT_J },
3006 { "left_j", SND_SOC_DAIFMT_LEFT_J },
3007 { "dsp_a", SND_SOC_DAIFMT_DSP_A },
3008 { "dsp_b", SND_SOC_DAIFMT_DSP_B },
3009 { "ac97", SND_SOC_DAIFMT_AC97 },
3010 { "pdm", SND_SOC_DAIFMT_PDM},
3011 { "msb", SND_SOC_DAIFMT_MSB },
3012 { "lsb", SND_SOC_DAIFMT_LSB },
3019 * check "dai-format = xxx"
3020 * or "[prefix]format = xxx"
3021 * SND_SOC_DAIFMT_FORMAT_MASK area
3023 ret = of_property_read_string(np, "dai-format", &str);
3025 snprintf(prop, sizeof(prop), "%sformat", prefix);
3026 ret = of_property_read_string(np, prop, &str);
3029 for (i = 0; i < ARRAY_SIZE(of_fmt_table); i++) {
3030 if (strcmp(str, of_fmt_table[i].name) == 0) {
3031 format |= of_fmt_table[i].val;
3038 * check "[prefix]continuous-clock"
3039 * SND_SOC_DAIFMT_CLOCK_MASK area
3041 snprintf(prop, sizeof(prop), "%scontinuous-clock", prefix);
3042 if (of_property_read_bool(np, prop))
3043 format |= SND_SOC_DAIFMT_CONT;
3045 format |= SND_SOC_DAIFMT_GATED;
3048 * check "[prefix]bitclock-inversion"
3049 * check "[prefix]frame-inversion"
3050 * SND_SOC_DAIFMT_INV_MASK area
3052 snprintf(prop, sizeof(prop), "%sbitclock-inversion", prefix);
3053 bit = !!of_get_property(np, prop, NULL);
3055 snprintf(prop, sizeof(prop), "%sframe-inversion", prefix);
3056 frame = !!of_get_property(np, prop, NULL);
3058 switch ((bit << 4) + frame) {
3060 format |= SND_SOC_DAIFMT_IB_IF;
3063 format |= SND_SOC_DAIFMT_IB_NF;
3066 format |= SND_SOC_DAIFMT_NB_IF;
3069 /* SND_SOC_DAIFMT_NB_NF is default */
3074 * check "[prefix]bitclock-master"
3075 * check "[prefix]frame-master"
3076 * SND_SOC_DAIFMT_MASTER_MASK area
3078 snprintf(prop, sizeof(prop), "%sbitclock-master", prefix);
3079 bit = !!of_get_property(np, prop, NULL);
3080 if (bit && bitclkmaster)
3081 *bitclkmaster = of_parse_phandle(np, prop, 0);
3083 snprintf(prop, sizeof(prop), "%sframe-master", prefix);
3084 frame = !!of_get_property(np, prop, NULL);
3085 if (frame && framemaster)
3086 *framemaster = of_parse_phandle(np, prop, 0);
3088 switch ((bit << 4) + frame) {
3090 format |= SND_SOC_DAIFMT_CBM_CFM;
3093 format |= SND_SOC_DAIFMT_CBM_CFS;
3096 format |= SND_SOC_DAIFMT_CBS_CFM;
3099 format |= SND_SOC_DAIFMT_CBS_CFS;
3105 EXPORT_SYMBOL_GPL(snd_soc_of_parse_daifmt);
3107 int snd_soc_get_dai_id(struct device_node *ep)
3109 struct snd_soc_component *component;
3110 struct snd_soc_dai_link_component dlc;
3113 dlc.of_node = of_graph_get_port_parent(ep);
3116 * For example HDMI case, HDMI has video/sound port,
3117 * but ALSA SoC needs sound port number only.
3118 * Thus counting HDMI DT port/endpoint doesn't work.
3119 * Then, it should have .of_xlate_dai_id
3122 mutex_lock(&client_mutex);
3123 component = soc_find_component(&dlc);
3125 ret = snd_soc_component_of_xlate_dai_id(component, ep);
3126 mutex_unlock(&client_mutex);
3128 of_node_put(dlc.of_node);
3132 EXPORT_SYMBOL_GPL(snd_soc_get_dai_id);
3134 int snd_soc_get_dai_name(struct of_phandle_args *args,
3135 const char **dai_name)
3137 struct snd_soc_component *pos;
3138 struct device_node *component_of_node;
3139 int ret = -EPROBE_DEFER;
3141 mutex_lock(&client_mutex);
3142 for_each_component(pos) {
3143 component_of_node = soc_component_to_node(pos);
3145 if (component_of_node != args->np)
3148 ret = snd_soc_component_of_xlate_dai_name(pos, args, dai_name);
3149 if (ret == -ENOTSUPP) {
3150 struct snd_soc_dai *dai;
3153 switch (args->args_count) {
3155 id = 0; /* same as dai_drv[0] */
3165 if (id < 0 || id >= pos->num_dai) {
3172 /* find target DAI */
3173 for_each_component_dais(pos, dai) {
3179 *dai_name = dai->driver->name;
3181 *dai_name = pos->name;
3186 mutex_unlock(&client_mutex);
3189 EXPORT_SYMBOL_GPL(snd_soc_get_dai_name);
3191 int snd_soc_of_get_dai_name(struct device_node *of_node,
3192 const char **dai_name)
3194 struct of_phandle_args args;
3197 ret = of_parse_phandle_with_args(of_node, "sound-dai",
3198 "#sound-dai-cells", 0, &args);
3202 ret = snd_soc_get_dai_name(&args, dai_name);
3204 of_node_put(args.np);
3208 EXPORT_SYMBOL_GPL(snd_soc_of_get_dai_name);
3211 * snd_soc_of_put_dai_link_codecs - Dereference device nodes in the codecs array
3212 * @dai_link: DAI link
3214 * Dereference device nodes acquired by snd_soc_of_get_dai_link_codecs().
3216 void snd_soc_of_put_dai_link_codecs(struct snd_soc_dai_link *dai_link)
3218 struct snd_soc_dai_link_component *component;
3221 for_each_link_codecs(dai_link, index, component) {
3222 if (!component->of_node)
3224 of_node_put(component->of_node);
3225 component->of_node = NULL;
3228 EXPORT_SYMBOL_GPL(snd_soc_of_put_dai_link_codecs);
3231 * snd_soc_of_get_dai_link_codecs - Parse a list of CODECs in the devicetree
3233 * @of_node: Device node
3234 * @dai_link: DAI link
3236 * Builds an array of CODEC DAI components from the DAI link property
3238 * The array is set in the DAI link and the number of DAIs is set accordingly.
3239 * The device nodes in the array (of_node) must be dereferenced by calling
3240 * snd_soc_of_put_dai_link_codecs() on @dai_link.
3242 * Returns 0 for success
3244 int snd_soc_of_get_dai_link_codecs(struct device *dev,
3245 struct device_node *of_node,
3246 struct snd_soc_dai_link *dai_link)
3248 struct of_phandle_args args;
3249 struct snd_soc_dai_link_component *component;
3251 int index, num_codecs, ret;
3253 /* Count the number of CODECs */
3255 num_codecs = of_count_phandle_with_args(of_node, name,
3256 "#sound-dai-cells");
3257 if (num_codecs <= 0) {
3258 if (num_codecs == -ENOENT)
3259 dev_err(dev, "No 'sound-dai' property\n");
3261 dev_err(dev, "Bad phandle in 'sound-dai'\n");
3264 component = devm_kcalloc(dev,
3265 num_codecs, sizeof(*component),
3269 dai_link->codecs = component;
3270 dai_link->num_codecs = num_codecs;
3272 /* Parse the list */
3273 for_each_link_codecs(dai_link, index, component) {
3274 ret = of_parse_phandle_with_args(of_node, name,
3279 component->of_node = args.np;
3280 ret = snd_soc_get_dai_name(&args, &component->dai_name);
3286 snd_soc_of_put_dai_link_codecs(dai_link);
3287 dai_link->codecs = NULL;
3288 dai_link->num_codecs = 0;
3291 EXPORT_SYMBOL_GPL(snd_soc_of_get_dai_link_codecs);
3293 static int __init snd_soc_init(void)
3295 snd_soc_debugfs_init();
3296 snd_soc_util_init();
3298 return platform_driver_register(&soc_driver);
3300 module_init(snd_soc_init);
3302 static void __exit snd_soc_exit(void)
3304 snd_soc_util_exit();
3305 snd_soc_debugfs_exit();
3307 platform_driver_unregister(&soc_driver);
3309 module_exit(snd_soc_exit);
3311 /* Module information */
3312 MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
3313 MODULE_DESCRIPTION("ALSA SoC Core");
3314 MODULE_LICENSE("GPL");
3315 MODULE_ALIAS("platform:soc-audio");