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// SPDX-License-Identifier: GPL-2.0+
//
// soc-core.c -- ALSA SoC Audio Layer
//
// Copyright 2005 Wolfson Microelectronics PLC.
// Copyright 2005 Openedhand Ltd.
// Copyright (C) 2010 Slimlogic Ltd.
// Copyright (C) 2010 Texas Instruments Inc.
//
// Author: Liam Girdwood <lrg@slimlogic.co.uk>
// with code, comments and ideas from :-
// Richard Purdie <richard@openedhand.com>
//
// TODO:
// o Add hw rules to enforce rates, etc.
// o More testing with other codecs/machines.
// o Add more codecs and platforms to ensure good API coverage.
// o Support TDM on PCM and I2S
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <linux/pm.h>
#include <linux/bitops.h>
#include <linux/debugfs.h>
#include <linux/platform_device.h>
#include <linux/pinctrl/consumer.h>
#include <linux/ctype.h>
#include <linux/slab.h>
#include <linux/of.h>
#include <linux/of_graph.h>
#include <linux/dmi.h>
#include <sound/core.h>
#include <sound/jack.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>
#include <sound/soc-dpcm.h>
#include <sound/soc-topology.h>
#include <sound/initval.h>
#define CREATE_TRACE_POINTS
#include <trace/events/asoc.h>
#define NAME_SIZE 32
#ifdef CONFIG_DEBUG_FS
struct dentry *snd_soc_debugfs_root;
EXPORT_SYMBOL_GPL(snd_soc_debugfs_root);
#endif
static DEFINE_MUTEX(client_mutex);
static LIST_HEAD(component_list);
static LIST_HEAD(unbind_card_list);
#define for_each_component(component) \
list_for_each_entry(component, &component_list, list)
/*
* This is used if driver don't need to have CPU/Codec/Platform
* dai_link. see soc.h
*/
struct snd_soc_dai_link_component null_dailink_component[0];
EXPORT_SYMBOL_GPL(null_dailink_component);
/*
* This is a timeout to do a DAPM powerdown after a stream is closed().
* It can be used to eliminate pops between different playback streams, e.g.
* between two audio tracks.
*/
static int pmdown_time = 5000;
module_param(pmdown_time, int, 0);
MODULE_PARM_DESC(pmdown_time, "DAPM stream powerdown time (msecs)");
#ifdef CONFIG_DMI
/*
* If a DMI filed contain strings in this blacklist (e.g.
* "Type2 - Board Manufacturer" or "Type1 - TBD by OEM"), it will be taken
* as invalid and dropped when setting the card long name from DMI info.
*/
static const char * const dmi_blacklist[] = {
"To be filled by OEM",
"TBD by OEM",
"Default String",
"Board Manufacturer",
"Board Vendor Name",
"Board Product Name",
NULL, /* terminator */
};
#endif
static ssize_t pmdown_time_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev);
return sprintf(buf, "%ld\n", rtd->pmdown_time);
}
static ssize_t pmdown_time_set(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev);
int ret;
ret = kstrtol(buf, 10, &rtd->pmdown_time);
if (ret)
return ret;
return count;
}
static DEVICE_ATTR(pmdown_time, 0644, pmdown_time_show, pmdown_time_set);
static struct attribute *soc_dev_attrs[] = {
&dev_attr_pmdown_time.attr,
NULL
};
static umode_t soc_dev_attr_is_visible(struct kobject *kobj,
struct attribute *attr, int idx)
{
struct device *dev = kobj_to_dev(kobj);
struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev);
if (!rtd)
return 0;
if (attr == &dev_attr_pmdown_time.attr)
return attr->mode; /* always visible */
return rtd->num_codecs ? attr->mode : 0; /* enabled only with codec */
}
static const struct attribute_group soc_dapm_dev_group = {
.attrs = soc_dapm_dev_attrs,
.is_visible = soc_dev_attr_is_visible,
};
static const struct attribute_group soc_dev_group = {
.attrs = soc_dev_attrs,
.is_visible = soc_dev_attr_is_visible,
};
static const struct attribute_group *soc_dev_attr_groups[] = {
&soc_dapm_dev_group,
&soc_dev_group,
NULL
};
#ifdef CONFIG_DEBUG_FS
static void soc_init_component_debugfs(struct snd_soc_component *component)
{
if (!component->card->debugfs_card_root)
return;
if (component->debugfs_prefix) {
char *name;
name = kasprintf(GFP_KERNEL, "%s:%s",
component->debugfs_prefix, component->name);
if (name) {
component->debugfs_root = debugfs_create_dir(name,
component->card->debugfs_card_root);
kfree(name);
}
} else {
component->debugfs_root = debugfs_create_dir(component->name,
component->card->debugfs_card_root);
}
snd_soc_dapm_debugfs_init(snd_soc_component_get_dapm(component),
component->debugfs_root);
}
static void soc_cleanup_component_debugfs(struct snd_soc_component *component)
{
if (!component->debugfs_root)
return;
debugfs_remove_recursive(component->debugfs_root);
component->debugfs_root = NULL;
}
static int dai_list_show(struct seq_file *m, void *v)
{
struct snd_soc_component *component;
struct snd_soc_dai *dai;
mutex_lock(&client_mutex);
for_each_component(component)
for_each_component_dais(component, dai)
seq_printf(m, "%s\n", dai->name);
mutex_unlock(&client_mutex);
return 0;
}
DEFINE_SHOW_ATTRIBUTE(dai_list);
static int component_list_show(struct seq_file *m, void *v)
{
struct snd_soc_component *component;
mutex_lock(&client_mutex);
for_each_component(component)
seq_printf(m, "%s\n", component->name);
mutex_unlock(&client_mutex);
return 0;
}
DEFINE_SHOW_ATTRIBUTE(component_list);
static void soc_init_card_debugfs(struct snd_soc_card *card)
{
card->debugfs_card_root = debugfs_create_dir(card->name,
snd_soc_debugfs_root);
debugfs_create_u32("dapm_pop_time", 0644, card->debugfs_card_root,
&card->pop_time);
snd_soc_dapm_debugfs_init(&card->dapm, card->debugfs_card_root);
}
static void soc_cleanup_card_debugfs(struct snd_soc_card *card)
{
debugfs_remove_recursive(card->debugfs_card_root);
card->debugfs_card_root = NULL;
}
static void snd_soc_debugfs_init(void)
{
snd_soc_debugfs_root = debugfs_create_dir("asoc", NULL);
debugfs_create_file("dais", 0444, snd_soc_debugfs_root, NULL,
&dai_list_fops);
debugfs_create_file("components", 0444, snd_soc_debugfs_root, NULL,
&component_list_fops);
}
static void snd_soc_debugfs_exit(void)
{
debugfs_remove_recursive(snd_soc_debugfs_root);
}
#else
static inline void soc_init_component_debugfs(
struct snd_soc_component *component)
{
}
static inline void soc_cleanup_component_debugfs(
struct snd_soc_component *component)
{
}
static inline void soc_init_card_debugfs(struct snd_soc_card *card)
{
}
static inline void soc_cleanup_card_debugfs(struct snd_soc_card *card)
{
}
static inline void snd_soc_debugfs_init(void)
{
}
static inline void snd_soc_debugfs_exit(void)
{
}
#endif
/*
* This is glue code between snd_pcm_lib_ioctl() and
* snd_soc_component_driver :: ioctl
*/
int snd_soc_pcm_lib_ioctl(struct snd_soc_component *component,
struct snd_pcm_substream *substream,
unsigned int cmd, void *arg)
{
return snd_pcm_lib_ioctl(substream, cmd, arg);
}
EXPORT_SYMBOL_GPL(snd_soc_pcm_lib_ioctl);
static int snd_soc_rtdcom_add(struct snd_soc_pcm_runtime *rtd,
struct snd_soc_component *component)
{
struct snd_soc_rtdcom_list *rtdcom;
struct snd_soc_component *comp;
for_each_rtd_components(rtd, rtdcom, comp) {
/* already connected */
if (comp == component)
return 0;
}
/*
* created rtdcom here will be freed when rtd->dev was freed.
* see
* soc_free_pcm_runtime() :: device_unregister(rtd->dev)
*/
rtdcom = devm_kzalloc(rtd->dev, sizeof(*rtdcom), GFP_KERNEL);
if (!rtdcom)
return -ENOMEM;
rtdcom->component = component;
INIT_LIST_HEAD(&rtdcom->list);
/*
* When rtd was freed, created rtdcom here will be
* also freed.
* And we don't need to call list_del(&rtdcom->list)
* when freed, because rtd is also freed.
*/
list_add_tail(&rtdcom->list, &rtd->component_list);
return 0;
}
struct snd_soc_component *snd_soc_rtdcom_lookup(struct snd_soc_pcm_runtime *rtd,
const char *driver_name)
{
struct snd_soc_rtdcom_list *rtdcom;
struct snd_soc_component *component;
if (!driver_name)
return NULL;
/*
* NOTE
*
* snd_soc_rtdcom_lookup() will find component from rtd by using
* specified driver name.
* But, if many components which have same driver name are connected
* to 1 rtd, this function will return 1st found component.
*/
for_each_rtd_components(rtd, rtdcom, component) {
const char *component_name = component->driver->name;
if (!component_name)
continue;
if ((component_name == driver_name) ||
strcmp(component_name, driver_name) == 0)
return rtdcom->component;
}
return NULL;
}
EXPORT_SYMBOL_GPL(snd_soc_rtdcom_lookup);
static struct snd_soc_component
*snd_soc_lookup_component_nolocked(struct device *dev, const char *driver_name)
{
struct snd_soc_component *component;
struct snd_soc_component *found_component;
found_component = NULL;
for_each_component(component) {
if ((dev == component->dev) &&
(!driver_name ||
(driver_name == component->driver->name) ||
(strcmp(component->driver->name, driver_name) == 0))) {
found_component = component;
break;
}
}
return found_component;
}
struct snd_soc_component *snd_soc_lookup_component(struct device *dev,
const char *driver_name)
{
struct snd_soc_component *component;
mutex_lock(&client_mutex);
component = snd_soc_lookup_component_nolocked(dev, driver_name);
mutex_unlock(&client_mutex);
return component;
}
EXPORT_SYMBOL_GPL(snd_soc_lookup_component);
struct snd_pcm_substream *snd_soc_get_dai_substream(struct snd_soc_card *card,
const char *dai_link, int stream)
{
struct snd_soc_pcm_runtime *rtd;
for_each_card_rtds(card, rtd) {
if (rtd->dai_link->no_pcm &&
!strcmp(rtd->dai_link->name, dai_link))
return rtd->pcm->streams[stream].substream;
}
dev_dbg(card->dev, "ASoC: failed to find dai link %s\n", dai_link);
return NULL;
}
EXPORT_SYMBOL_GPL(snd_soc_get_dai_substream);
static const struct snd_soc_ops null_snd_soc_ops;
static void soc_release_rtd_dev(struct device *dev)
{
/* "dev" means "rtd->dev" */
kfree(dev);
}
static void soc_free_pcm_runtime(struct snd_soc_pcm_runtime *rtd)
{
if (!rtd)
return;
list_del(&rtd->list);
flush_delayed_work(&rtd->delayed_work);
snd_soc_pcm_component_free(rtd);
/*
* we don't need to call kfree() for rtd->dev
* see
* soc_release_rtd_dev()
*
* We don't need rtd->dev NULL check, because
* it is alloced *before* rtd.
* see
* soc_new_pcm_runtime()
*/
device_unregister(rtd->dev);
}
static struct snd_soc_pcm_runtime *soc_new_pcm_runtime(
struct snd_soc_card *card, struct snd_soc_dai_link *dai_link)
{
struct snd_soc_pcm_runtime *rtd;
struct device *dev;
int ret;
/*
* for rtd->dev
*/
dev = kzalloc(sizeof(struct device), GFP_KERNEL);
if (!dev)
return NULL;
dev->parent = card->dev;
dev->release = soc_release_rtd_dev;
dev->groups = soc_dev_attr_groups;
dev_set_name(dev, "%s", dai_link->name);
ret = device_register(dev);
if (ret < 0) {
put_device(dev); /* soc_release_rtd_dev */
return NULL;
}
/*
* for rtd
*/
rtd = devm_kzalloc(dev, sizeof(*rtd), GFP_KERNEL);
if (!rtd)
goto free_rtd;
rtd->dev = dev;
dev_set_drvdata(dev, rtd);
/*
* for rtd->codec_dais
*/
rtd->codec_dais = devm_kcalloc(dev, dai_link->num_codecs,
sizeof(struct snd_soc_dai *),
GFP_KERNEL);
if (!rtd->codec_dais)
goto free_rtd;
/*
* rtd remaining settings
*/
INIT_LIST_HEAD(&rtd->component_list);
INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_PLAYBACK].be_clients);
INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_CAPTURE].be_clients);
INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_PLAYBACK].fe_clients);
INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_CAPTURE].fe_clients);
rtd->card = card;
rtd->dai_link = dai_link;
if (!rtd->dai_link->ops)
rtd->dai_link->ops = &null_snd_soc_ops;
/* see for_each_card_rtds */
list_add_tail(&rtd->list, &card->rtd_list);
rtd->num = card->num_rtd;
card->num_rtd++;
return rtd;
free_rtd:
soc_free_pcm_runtime(rtd);
return NULL;
}
struct snd_soc_pcm_runtime *snd_soc_get_pcm_runtime(struct snd_soc_card *card,
const char *dai_link)
{
struct snd_soc_pcm_runtime *rtd;
for_each_card_rtds(card, rtd) {
if (!strcmp(rtd->dai_link->name, dai_link))
return rtd;
}
dev_dbg(card->dev, "ASoC: failed to find rtd %s\n", dai_link);
return NULL;
}
EXPORT_SYMBOL_GPL(snd_soc_get_pcm_runtime);
static void snd_soc_flush_all_delayed_work(struct snd_soc_card *card)
{
struct snd_soc_pcm_runtime *rtd;
for_each_card_rtds(card, rtd)
flush_delayed_work(&rtd->delayed_work);
}
#ifdef CONFIG_PM_SLEEP
/* powers down audio subsystem for suspend */
int snd_soc_suspend(struct device *dev)
{
struct snd_soc_card *card = dev_get_drvdata(dev);
struct snd_soc_component *component;
struct snd_soc_pcm_runtime *rtd;
int i;
/* If the card is not initialized yet there is nothing to do */
if (!card->instantiated)
return 0;
/*
* Due to the resume being scheduled into a workqueue we could
* suspend before that's finished - wait for it to complete.
*/
snd_power_wait(card->snd_card, SNDRV_CTL_POWER_D0);
/* we're going to block userspace touching us until resume completes */
snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D3hot);
/* mute any active DACs */
for_each_card_rtds(card, rtd) {
struct snd_soc_dai *dai;
if (rtd->dai_link->ignore_suspend)
continue;
for_each_rtd_codec_dai(rtd, i, dai) {
if (dai->playback_active)
snd_soc_dai_digital_mute(dai, 1,
SNDRV_PCM_STREAM_PLAYBACK);
}
}
/* suspend all pcms */
for_each_card_rtds(card, rtd) {
if (rtd->dai_link->ignore_suspend)
continue;
snd_pcm_suspend_all(rtd->pcm);
}
if (card->suspend_pre)
card->suspend_pre(card);
for_each_card_rtds(card, rtd) {
struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
if (rtd->dai_link->ignore_suspend)
continue;
if (!cpu_dai->driver->bus_control)
snd_soc_dai_suspend(cpu_dai);
}
/* close any waiting streams */
snd_soc_flush_all_delayed_work(card);
for_each_card_rtds(card, rtd) {
if (rtd->dai_link->ignore_suspend)
continue;
snd_soc_dapm_stream_event(rtd,
SNDRV_PCM_STREAM_PLAYBACK,
SND_SOC_DAPM_STREAM_SUSPEND);
snd_soc_dapm_stream_event(rtd,
SNDRV_PCM_STREAM_CAPTURE,
SND_SOC_DAPM_STREAM_SUSPEND);
}
/* Recheck all endpoints too, their state is affected by suspend */
dapm_mark_endpoints_dirty(card);
snd_soc_dapm_sync(&card->dapm);
/* suspend all COMPONENTs */
for_each_card_components(card, component) {
struct snd_soc_dapm_context *dapm =
snd_soc_component_get_dapm(component);
/*
* If there are paths active then the COMPONENT will be held
* with bias _ON and should not be suspended.
*/
if (!snd_soc_component_is_suspended(component)) {
switch (snd_soc_dapm_get_bias_level(dapm)) {
case SND_SOC_BIAS_STANDBY:
/*
* If the COMPONENT is capable of idle
* bias off then being in STANDBY
* means it's doing something,
* otherwise fall through.
*/
if (dapm->idle_bias_off) {
dev_dbg(component->dev,
"ASoC: idle_bias_off CODEC on over suspend\n");
break;
}
/* fall through */
case SND_SOC_BIAS_OFF:
snd_soc_component_suspend(component);
if (component->regmap)
regcache_mark_dirty(component->regmap);
/* deactivate pins to sleep state */
pinctrl_pm_select_sleep_state(component->dev);
break;
default:
dev_dbg(component->dev,
"ASoC: COMPONENT is on over suspend\n");
break;
}
}
}
for_each_card_rtds(card, rtd) {
struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
if (rtd->dai_link->ignore_suspend)
continue;
if (cpu_dai->driver->bus_control)
snd_soc_dai_suspend(cpu_dai);
/* deactivate pins to sleep state */
pinctrl_pm_select_sleep_state(cpu_dai->dev);
}
if (card->suspend_post)
card->suspend_post(card);
return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_suspend);
/*
* deferred resume work, so resume can complete before we finished
* setting our codec back up, which can be very slow on I2C
*/
static void soc_resume_deferred(struct work_struct *work)
{
struct snd_soc_card *card =
container_of(work, struct snd_soc_card,
deferred_resume_work);
struct snd_soc_pcm_runtime *rtd;
struct snd_soc_component *component;
int i;
/*
* our power state is still SNDRV_CTL_POWER_D3hot from suspend time,
* so userspace apps are blocked from touching us
*/
dev_dbg(card->dev, "ASoC: starting resume work\n");
/* Bring us up into D2 so that DAPM starts enabling things */
snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D2);
if (card->resume_pre)
card->resume_pre(card);
/* resume control bus DAIs */
for_each_card_rtds(card, rtd) {
struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
if (rtd->dai_link->ignore_suspend)
continue;
if (cpu_dai->driver->bus_control)
snd_soc_dai_resume(cpu_dai);
}
for_each_card_components(card, component) {
if (snd_soc_component_is_suspended(component))
snd_soc_component_resume(component);
}
for_each_card_rtds(card, rtd) {
if (rtd->dai_link->ignore_suspend)
continue;
snd_soc_dapm_stream_event(rtd,
SNDRV_PCM_STREAM_PLAYBACK,
SND_SOC_DAPM_STREAM_RESUME);
snd_soc_dapm_stream_event(rtd,
SNDRV_PCM_STREAM_CAPTURE,
SND_SOC_DAPM_STREAM_RESUME);
}
/* unmute any active DACs */
for_each_card_rtds(card, rtd) {
struct snd_soc_dai *dai;
if (rtd->dai_link->ignore_suspend)
continue;
for_each_rtd_codec_dai(rtd, i, dai) {
if (dai->playback_active)
snd_soc_dai_digital_mute(dai, 0,
SNDRV_PCM_STREAM_PLAYBACK);
}
}
for_each_card_rtds(card, rtd) {
struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
if (rtd->dai_link->ignore_suspend)
continue;
if (!cpu_dai->driver->bus_control)
snd_soc_dai_resume(cpu_dai);
}
if (card->resume_post)
card->resume_post(card);
dev_dbg(card->dev, "ASoC: resume work completed\n");
/* Recheck all endpoints too, their state is affected by suspend */
dapm_mark_endpoints_dirty(card);
snd_soc_dapm_sync(&card->dapm);
/* userspace can access us now we are back as we were before */
snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D0);
}
/* powers up audio subsystem after a suspend */
int snd_soc_resume(struct device *dev)
{
struct snd_soc_card *card = dev_get_drvdata(dev);
bool bus_control = false;
struct snd_soc_pcm_runtime *rtd;
struct snd_soc_dai *codec_dai;
int i;
/* If the card is not initialized yet there is nothing to do */
if (!card->instantiated)
return 0;
/* activate pins from sleep state */
for_each_card_rtds(card, rtd) {
struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
if (cpu_dai->active)
pinctrl_pm_select_default_state(cpu_dai->dev);
for_each_rtd_codec_dai(rtd, i, codec_dai) {
if (codec_dai->active)
pinctrl_pm_select_default_state(codec_dai->dev);
}
}
/*
* DAIs that also act as the control bus master might have other drivers
* hanging off them so need to resume immediately. Other drivers don't
* have that problem and may take a substantial amount of time to resume
* due to I/O costs and anti-pop so handle them out of line.
*/
for_each_card_rtds(card, rtd) {
struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
bus_control |= cpu_dai->driver->bus_control;
}
if (bus_control) {
dev_dbg(dev, "ASoC: Resuming control bus master immediately\n");
soc_resume_deferred(&card->deferred_resume_work);
} else {
dev_dbg(dev, "ASoC: Scheduling resume work\n");
if (!schedule_work(&card->deferred_resume_work))
dev_err(dev, "ASoC: resume work item may be lost\n");
}
return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_resume);
static void soc_resume_init(struct snd_soc_card *card)
{
/* deferred resume work */
INIT_WORK(&card->deferred_resume_work, soc_resume_deferred);
}
#else
#define snd_soc_suspend NULL
#define snd_soc_resume NULL
static inline void soc_resume_init(struct snd_soc_card *card)
{
}
#endif
static const struct snd_soc_dai_ops null_dai_ops = {
};
static struct device_node
*soc_component_to_node(struct snd_soc_component *component)
{
struct device_node *of_node;
of_node = component->dev->of_node;
if (!of_node && component->dev->parent)
of_node = component->dev->parent->of_node;
return of_node;
}
static int snd_soc_is_matching_component(
const struct snd_soc_dai_link_component *dlc,
struct snd_soc_component *component)
{
struct device_node *component_of_node;
if (!dlc)
return 0;
component_of_node = soc_component_to_node(component);
if (dlc->of_node && component_of_node != dlc->of_node)
return 0;
if (dlc->name && strcmp(component->name, dlc->name))
return 0;
return 1;
}
static struct snd_soc_component *soc_find_component(
const struct snd_soc_dai_link_component *dlc)
{
struct snd_soc_component *component;
lockdep_assert_held(&client_mutex);
/*
* NOTE
*
* It returns *1st* found component, but some driver
* has few components by same of_node/name
* ex)
* CPU component and generic DMAEngine component
*/
for_each_component(component)
if (snd_soc_is_matching_component(dlc, component))
return component;
return NULL;
}
/**
* snd_soc_find_dai - Find a registered DAI
*
* @dlc: name of the DAI or the DAI driver and optional component info to match
*
* This function will search all registered components and their DAIs to
* find the DAI of the same name. The component's of_node and name
* should also match if being specified.
*
* Return: pointer of DAI, or NULL if not found.
*/
struct snd_soc_dai *snd_soc_find_dai(
const struct snd_soc_dai_link_component *dlc)
{
struct snd_soc_component *component;
struct snd_soc_dai *dai;
lockdep_assert_held(&client_mutex);
/* Find CPU DAI from registered DAIs */
for_each_component(component) {
if (!snd_soc_is_matching_component(dlc, component))
continue;
for_each_component_dais(component, dai) {
if (dlc->dai_name && strcmp(dai->name, dlc->dai_name)
&& (!dai->driver->name
|| strcmp(dai->driver->name, dlc->dai_name)))
continue;
return dai;
}
}
return NULL;
}
EXPORT_SYMBOL_GPL(snd_soc_find_dai);
/**
* snd_soc_find_dai_link - Find a DAI link
*
* @card: soc card
* @id: DAI link ID to match
* @name: DAI link name to match, optional
* @stream_name: DAI link stream name to match, optional
*
* This function will search all existing DAI links of the soc card to
* find the link of the same ID. Since DAI links may not have their
* unique ID, so name and stream name should also match if being
* specified.
*
* Return: pointer of DAI link, or NULL if not found.
*/
struct snd_soc_dai_link *snd_soc_find_dai_link(struct snd_soc_card *card,
int id, const char *name,
const char *stream_name)
{
struct snd_soc_dai_link *link;
lockdep_assert_held(&client_mutex);
for_each_card_links(card, link) {
if (link->id != id)
continue;
if (name && (!link->name || strcmp(name, link->name)))
continue;
if (stream_name && (!link->stream_name
|| strcmp(stream_name, link->stream_name)))
continue;
return link;
}
return NULL;
}
EXPORT_SYMBOL_GPL(snd_soc_find_dai_link);
static int soc_dai_link_sanity_check(struct snd_soc_card *card,
struct snd_soc_dai_link *link)
{
int i;
struct snd_soc_dai_link_component *codec, *platform;
for_each_link_codecs(link, i, codec) {
/*
* Codec must be specified by 1 of name or OF node,
* not both or neither.
*/
if (!!codec->name == !!codec->of_node) {
dev_err(card->dev, "ASoC: Neither/both codec name/of_node are set for %s\n",
link->name);
return -EINVAL;
}
/* Codec DAI name must be specified */
if (!codec->dai_name) {
dev_err(card->dev, "ASoC: codec_dai_name not set for %s\n",
link->name);
return -EINVAL;
}
/*
* Defer card registration if codec component is not added to
* component list.
*/
if (!soc_find_component(codec))
return -EPROBE_DEFER;
}
for_each_link_platforms(link, i, platform) {
/*
* Platform may be specified by either name or OF node, but it
* can be left unspecified, then no components will be inserted
* in the rtdcom list
*/
if (!!platform->name == !!platform->of_node) {
dev_err(card->dev,
"ASoC: Neither/both platform name/of_node are set for %s\n",
link->name);
return -EINVAL;
}
/*
* Defer card registration if platform component is not added to
* component list.
*/
if (!soc_find_component(platform))
return -EPROBE_DEFER;
}
/* FIXME */
if (link->num_cpus > 1) {
dev_err(card->dev,
"ASoC: multi cpu is not yet supported %s\n",
link->name);
return -EINVAL;
}
/*
* CPU device may be specified by either name or OF node, but
* can be left unspecified, and will be matched based on DAI
* name alone..
*/
if (link->cpus->name && link->cpus->of_node) {
dev_err(card->dev,
"ASoC: Neither/both cpu name/of_node are set for %s\n",
link->name);
return -EINVAL;
}
/*
* Defer card registration if cpu dai component is not added to
* component list.
*/
if ((link->cpus->of_node || link->cpus->name) &&
!soc_find_component(link->cpus))
return -EPROBE_DEFER;
/*
* At least one of CPU DAI name or CPU device name/node must be
* specified
*/
if (!link->cpus->dai_name &&
!(link->cpus->name || link->cpus->of_node)) {
dev_err(card->dev,
"ASoC: Neither cpu_dai_name nor cpu_name/of_node are set for %s\n",
link->name);
return -EINVAL;
}
return 0;
}
/**
* snd_soc_remove_dai_link - Remove a DAI link from the list
* @card: The ASoC card that owns the link
* @dai_link: The DAI link to remove
*
* This function removes a DAI link from the ASoC card's link list.
*
* For DAI links previously added by topology, topology should
* remove them by using the dobj embedded in the link.
*/
void snd_soc_remove_dai_link(struct snd_soc_card *card,
struct snd_soc_dai_link *dai_link)
{
struct snd_soc_pcm_runtime *rtd;
lockdep_assert_held(&client_mutex);
/*
* Notify the machine driver for extra destruction
*/
if (card->remove_dai_link)
card->remove_dai_link(card, dai_link);
list_del(&dai_link->list);
rtd = snd_soc_get_pcm_runtime(card, dai_link->name);
if (rtd)
soc_free_pcm_runtime(rtd);
}
EXPORT_SYMBOL_GPL(snd_soc_remove_dai_link);
/**
* snd_soc_add_dai_link - Add a DAI link dynamically
* @card: The ASoC card to which the DAI link is added
* @dai_link: The new DAI link to add
*
* This function adds a DAI link to the ASoC card's link list.
*
* Note: Topology can use this API to add DAI links when probing the
* topology component. And machine drivers can still define static
* DAI links in dai_link array.
*/
int snd_soc_add_dai_link(struct snd_soc_card *card,
struct snd_soc_dai_link *dai_link)
{
struct snd_soc_pcm_runtime *rtd;
struct snd_soc_dai_link_component *codec, *platform;
struct snd_soc_component *component;
int i, ret;
lockdep_assert_held(&client_mutex);
/*
* Notify the machine driver for extra initialization
*/
if (card->add_dai_link)
card->add_dai_link(card, dai_link);
if (dai_link->ignore)
return 0;
dev_dbg(card->dev, "ASoC: binding %s\n", dai_link->name);
ret = soc_dai_link_sanity_check(card, dai_link);
if (ret < 0)
return ret;
rtd = soc_new_pcm_runtime(card, dai_link);
if (!rtd)
return -ENOMEM;
/* FIXME: we need multi CPU support in the future */
rtd->cpu_dai = snd_soc_find_dai(dai_link->cpus);
if (!rtd->cpu_dai) {
dev_info(card->dev, "ASoC: CPU DAI %s not registered\n",
dai_link->cpus->dai_name);
goto _err_defer;
}
snd_soc_rtdcom_add(rtd, rtd->cpu_dai->component);
/* Find CODEC from registered CODECs */
rtd->num_codecs = dai_link->num_codecs;
for_each_link_codecs(dai_link, i, codec) {
rtd->codec_dais[i] = snd_soc_find_dai(codec);
if (!rtd->codec_dais[i]) {
dev_info(card->dev, "ASoC: CODEC DAI %s not registered\n",
codec->dai_name);
goto _err_defer;
}
snd_soc_rtdcom_add(rtd, rtd->codec_dais[i]->component);
}
/* Single codec links expect codec and codec_dai in runtime data */
rtd->codec_dai = rtd->codec_dais[0];
/* Find PLATFORM from registered PLATFORMs */
for_each_link_platforms(dai_link, i, platform) {
for_each_component(component) {
if (!snd_soc_is_matching_component(platform, component))
continue;
snd_soc_rtdcom_add(rtd, component);
}
}
/* see for_each_card_links */
list_add_tail(&dai_link->list, &card->dai_link_list);
return 0;
_err_defer:
soc_free_pcm_runtime(rtd);
return -EPROBE_DEFER;
}
EXPORT_SYMBOL_GPL(snd_soc_add_dai_link);
static void soc_set_of_name_prefix(struct snd_soc_component *component)
{
struct device_node *of_node = soc_component_to_node(component);
const char *str;
int ret;
ret = of_property_read_string(of_node, "sound-name-prefix", &str);
if (!ret)
component->name_prefix = str;
}
static void soc_set_name_prefix(struct snd_soc_card *card,
struct snd_soc_component *component)
{
int i;
for (i = 0; i < card->num_configs && card->codec_conf; i++) {
struct snd_soc_codec_conf *map = &card->codec_conf[i];
struct device_node *of_node = soc_component_to_node(component);
if (map->of_node && of_node != map->of_node)
continue;
if (map->dev_name && strcmp(component->name, map->dev_name))
continue;
component->name_prefix = map->name_prefix;
return;
}
/*
* If there is no configuration table or no match in the table,
* check if a prefix is provided in the node
*/
soc_set_of_name_prefix(component);
}
static void soc_remove_component(struct snd_soc_component *component,
int probed)
{
if (!component->card)
return;
if (probed)
snd_soc_component_remove(component);
/* For framework level robustness */
snd_soc_component_set_jack(component, NULL, NULL);
list_del_init(&component->card_list);
snd_soc_dapm_free(snd_soc_component_get_dapm(component));
soc_cleanup_component_debugfs(component);
component->card = NULL;
snd_soc_component_module_put_when_remove(component);
}
static int soc_probe_component(struct snd_soc_card *card,
struct snd_soc_component *component)
{
struct snd_soc_dapm_context *dapm =
snd_soc_component_get_dapm(component);
struct snd_soc_dai *dai;
int probed = 0;
int ret;
if (!strcmp(component->name, "snd-soc-dummy"))
return 0;
if (component->card) {
if (component->card != card) {
dev_err(component->dev,
"Trying to bind component to card \"%s\" but is already bound to card \"%s\"\n",
card->name, component->card->name);
return -ENODEV;
}
return 0;
}
ret = snd_soc_component_module_get_when_probe(component);
if (ret < 0)
return ret;
component->card = card;
soc_set_name_prefix(card, component);
soc_init_component_debugfs(component);
snd_soc_dapm_init(dapm, card, component);
ret = snd_soc_dapm_new_controls(dapm,
component->driver->dapm_widgets,
component->driver->num_dapm_widgets);
if (ret != 0) {
dev_err(component->dev,
"Failed to create new controls %d\n", ret);
goto err_probe;
}
for_each_component_dais(component, dai) {
ret = snd_soc_dapm_new_dai_widgets(dapm, dai);
if (ret != 0) {
dev_err(component->dev,
"Failed to create DAI widgets %d\n", ret);
goto err_probe;
}
}
ret = snd_soc_component_probe(component);
if (ret < 0) {
dev_err(component->dev,
"ASoC: failed to probe component %d\n", ret);
goto err_probe;
}
WARN(dapm->idle_bias_off &&
dapm->bias_level != SND_SOC_BIAS_OFF,
"codec %s can not start from non-off bias with idle_bias_off==1\n",
component->name);
probed = 1;
/* machine specific init */
if (component->init) {
ret = component->init(component);
if (ret < 0) {
dev_err(component->dev,
"Failed to do machine specific init %d\n", ret);
goto err_probe;
}
}
ret = snd_soc_add_component_controls(component,
component->driver->controls,
component->driver->num_controls);
if (ret < 0)
goto err_probe;
ret = snd_soc_dapm_add_routes(dapm,
component->driver->dapm_routes,
component->driver->num_dapm_routes);
if (ret < 0)
goto err_probe;
/* see for_each_card_components */
list_add(&component->card_list, &card->component_dev_list);
err_probe:
if (ret < 0)
soc_remove_component(component, probed);
return ret;
}
static void soc_remove_dai(struct snd_soc_dai *dai, int order)
{
int err;
if (!dai || !dai->probed || !dai->driver ||
dai->driver->remove_order != order)
return;
err = snd_soc_dai_remove(dai);
if (err < 0)
dev_err(dai->dev,
"ASoC: failed to remove %s: %d\n",
dai->name, err);
dai->probed = 0;
}
static int soc_probe_dai(struct snd_soc_dai *dai, int order)
{
int ret;
if (dai->probed ||
dai->driver->probe_order != order)
return 0;
ret = snd_soc_dai_probe(dai);
if (ret < 0) {
dev_err(dai->dev, "ASoC: failed to probe DAI %s: %d\n",
dai->name, ret);
return ret;
}
dai->probed = 1;
return 0;
}
static void soc_remove_link_dais(struct snd_soc_card *card)
{
int i;
struct snd_soc_dai *codec_dai;
struct snd_soc_pcm_runtime *rtd;
int order;
for_each_comp_order(order) {
for_each_card_rtds(card, rtd) {
/* remove the CODEC DAI */
for_each_rtd_codec_dai(rtd, i, codec_dai)
soc_remove_dai(codec_dai, order);
soc_remove_dai(rtd->cpu_dai, order);
}
}
}
static int soc_probe_link_dais(struct snd_soc_card *card)
{
struct snd_soc_dai *codec_dai;
struct snd_soc_pcm_runtime *rtd;
int i, order, ret;
for_each_comp_order(order) {
for_each_card_rtds(card, rtd) {
dev_dbg(card->dev,
"ASoC: probe %s dai link %d late %d\n",
card->name, rtd->num, order);
ret = soc_probe_dai(rtd->cpu_dai, order);
if (ret)
return ret;
/* probe the CODEC DAI */
for_each_rtd_codec_dai(rtd, i, codec_dai) {
ret = soc_probe_dai(codec_dai, order);
if (ret)
return ret;
}
}
}
return 0;
}
static void soc_remove_link_components(struct snd_soc_card *card)
{
struct snd_soc_component *component;
struct snd_soc_pcm_runtime *rtd;
struct snd_soc_rtdcom_list *rtdcom;
int order;
for_each_comp_order(order) {
for_each_card_rtds(card, rtd) {
for_each_rtd_components(rtd, rtdcom, component) {
if (component->driver->remove_order != order)
continue;
soc_remove_component(component, 1);
}
}
}
}
static int soc_probe_link_components(struct snd_soc_card *card)
{
struct snd_soc_component *component;
struct snd_soc_pcm_runtime *rtd;
struct snd_soc_rtdcom_list *rtdcom;
int ret, order;
for_each_comp_order(order) {
for_each_card_rtds(card, rtd) {
for_each_rtd_components(rtd, rtdcom, component) {
if (component->driver->probe_order != order)
continue;
ret = soc_probe_component(card, component);
if (ret < 0)
return ret;
}
}
}
return 0;
}
void snd_soc_disconnect_sync(struct device *dev)
{
struct snd_soc_component *component =
snd_soc_lookup_component(dev, NULL);
if (!component || !component->card)
return;
snd_card_disconnect_sync(component->card->snd_card);
}
EXPORT_SYMBOL_GPL(snd_soc_disconnect_sync);
static int soc_link_dai_pcm_new(struct snd_soc_dai **dais, int num_dais,
struct snd_soc_pcm_runtime *rtd)
{
int i, ret = 0;
for (i = 0; i < num_dais; ++i) {
struct snd_soc_dai_driver *drv = dais[i]->driver;
if (drv->pcm_new)
ret = drv->pcm_new(rtd, dais[i]);
if (ret < 0) {
dev_err(dais[i]->dev,
"ASoC: Failed to bind %s with pcm device\n",
dais[i]->name);
return ret;
}
}
return 0;
}
static int soc_link_init(struct snd_soc_card *card,
struct snd_soc_pcm_runtime *rtd)
{
struct snd_soc_dai_link *dai_link = rtd->dai_link;
struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
struct snd_soc_rtdcom_list *rtdcom;
struct snd_soc_component *component;
int ret, num;
/* set default power off timeout */
rtd->pmdown_time = pmdown_time;
/* do machine specific initialization */
if (dai_link->init) {
ret = dai_link->init(rtd);
if (ret < 0) {
dev_err(card->dev, "ASoC: failed to init %s: %d\n",
dai_link->name, ret);
return ret;
}
}
if (dai_link->dai_fmt) {
ret = snd_soc_runtime_set_dai_fmt(rtd, dai_link->dai_fmt);
if (ret)
return ret;
}
/* add DPCM sysfs entries */
soc_dpcm_debugfs_add(rtd);
num = rtd->num;
/*
* most drivers will register their PCMs using DAI link ordering but
* topology based drivers can use the DAI link id field to set PCM
* device number and then use rtd + a base offset of the BEs.
*/
for_each_rtd_components(rtd, rtdcom, component) {
if (!component->driver->use_dai_pcm_id)
continue;
if (rtd->dai_link->no_pcm)
num += component->driver->be_pcm_base;
else
num = rtd->dai_link->id;
}
/* create compress_device if possible */
ret = snd_soc_dai_compress_new(cpu_dai, rtd, num);
if (ret != -ENOTSUPP) {
if (ret < 0)
dev_err(card->dev, "ASoC: can't create compress %s\n",
dai_link->stream_name);
return ret;
}
/* create the pcm */
ret = soc_new_pcm(rtd, num);
if (ret < 0) {
dev_err(card->dev, "ASoC: can't create pcm %s :%d\n",
dai_link->stream_name, ret);
return ret;
}
ret = soc_link_dai_pcm_new(&cpu_dai, 1, rtd);
if (ret < 0)
return ret;
ret = soc_link_dai_pcm_new(rtd->codec_dais,
rtd->num_codecs, rtd);
return ret;
}
static void soc_unbind_aux_dev(struct snd_soc_card *card)
{
struct snd_soc_component *component, *_component;
for_each_card_auxs_safe(card, component, _component) {
component->init = NULL;
list_del(&component->card_aux_list);
}
}
static int soc_bind_aux_dev(struct snd_soc_card *card)
{
struct snd_soc_component *component;
struct snd_soc_aux_dev *aux;
int i;
for_each_card_pre_auxs(card, i, aux) {
/* codecs, usually analog devices */
component = soc_find_component(&aux->dlc);
if (!component)
return -EPROBE_DEFER;
component->init = aux->init;
/* see for_each_card_auxs */
list_add(&component->card_aux_list, &card->aux_comp_list);
}
return 0;
}
static int soc_probe_aux_devices(struct snd_soc_card *card)
{
struct snd_soc_component *component;
int order;
int ret;
for_each_comp_order(order) {
for_each_card_auxs(card, component) {
if (component->driver->probe_order != order)
continue;
ret = soc_probe_component(card, component);
if (ret < 0)
return ret;
}
}
return 0;
}
static void soc_remove_aux_devices(struct snd_soc_card *card)
{
struct snd_soc_component *comp, *_comp;
int order;
for_each_comp_order(order) {
for_each_card_auxs_safe(card, comp, _comp) {
if (comp->driver->remove_order == order)
soc_remove_component(comp, 1);
}
}
}
/**
* snd_soc_runtime_set_dai_fmt() - Change DAI link format for a ASoC runtime
* @rtd: The runtime for which the DAI link format should be changed
* @dai_fmt: The new DAI link format
*
* This function updates the DAI link format for all DAIs connected to the DAI
* link for the specified runtime.
*
* Note: For setups with a static format set the dai_fmt field in the
* corresponding snd_dai_link struct instead of using this function.
*
* Returns 0 on success, otherwise a negative error code.
*/
int snd_soc_runtime_set_dai_fmt(struct snd_soc_pcm_runtime *rtd,
unsigned int dai_fmt)
{
struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
struct snd_soc_dai *codec_dai;
unsigned int i;
int ret;
for_each_rtd_codec_dai(rtd, i, codec_dai) {
ret = snd_soc_dai_set_fmt(codec_dai, dai_fmt);
if (ret != 0 && ret != -ENOTSUPP) {
dev_warn(codec_dai->dev,
"ASoC: Failed to set DAI format: %d\n", ret);
return ret;
}
}
/*
* Flip the polarity for the "CPU" end of a CODEC<->CODEC link
* the component which has non_legacy_dai_naming is Codec
*/
if (cpu_dai->component->driver->non_legacy_dai_naming) {
unsigned int inv_dai_fmt;
inv_dai_fmt = dai_fmt & ~SND_SOC_DAIFMT_MASTER_MASK;
switch (dai_fmt & SND_SOC_DAIFMT_MASTER_MASK) {
case SND_SOC_DAIFMT_CBM_CFM:
inv_dai_fmt |= SND_SOC_DAIFMT_CBS_CFS;
break;
case SND_SOC_DAIFMT_CBM_CFS:
inv_dai_fmt |= SND_SOC_DAIFMT_CBS_CFM;
break;
case SND_SOC_DAIFMT_CBS_CFM:
inv_dai_fmt |= SND_SOC_DAIFMT_CBM_CFS;
break;
case SND_SOC_DAIFMT_CBS_CFS:
inv_dai_fmt |= SND_SOC_DAIFMT_CBM_CFM;
break;
}
dai_fmt = inv_dai_fmt;
}
ret = snd_soc_dai_set_fmt(cpu_dai, dai_fmt);
if (ret != 0 && ret != -ENOTSUPP) {
dev_warn(cpu_dai->dev,
"ASoC: Failed to set DAI format: %d\n", ret);
return ret;
}
return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_runtime_set_dai_fmt);
#ifdef CONFIG_DMI
/*
* Trim special characters, and replace '-' with '_' since '-' is used to
* separate different DMI fields in the card long name. Only number and
* alphabet characters and a few separator characters are kept.
*/
static void cleanup_dmi_name(char *name)
{
int i, j = 0;
for (i = 0; name[i]; i++) {
if (isalnum(name[i]) || (name[i] == '.')
|| (name[i] == '_'))
name[j++] = name[i];
else if (name[i] == '-')
name[j++] = '_';
}
name[j] = '\0';
}
/*
* Check if a DMI field is valid, i.e. not containing any string
* in the black list.
*/
static int is_dmi_valid(const char *field)
{
int i = 0;
while (dmi_blacklist[i]) {
if (strstr(field, dmi_blacklist[i]))
return 0;
i++;
}
return 1;
}
/*
* Append a string to card->dmi_longname with character cleanups.
*/
static void append_dmi_string(struct snd_soc_card *card, const char *str)
{
char *dst = card->dmi_longname;
size_t dst_len = sizeof(card->dmi_longname);
size_t len;
len = strlen(dst);
snprintf(dst + len, dst_len - len, "-%s", str);
len++; /* skip the separator "-" */
if (len < dst_len)
cleanup_dmi_name(dst + len);
}
/**
* snd_soc_set_dmi_name() - Register DMI names to card
* @card: The card to register DMI names
* @flavour: The flavour "differentiator" for the card amongst its peers.
*
* An Intel machine driver may be used by many different devices but are
* difficult for userspace to differentiate, since machine drivers ususally
* use their own name as the card short name and leave the card long name
* blank. To differentiate such devices and fix bugs due to lack of
* device-specific configurations, this function allows DMI info to be used
* as the sound card long name, in the format of
* "vendor-product-version-board"
* (Character '-' is used to separate different DMI fields here).
* This will help the user space to load the device-specific Use Case Manager
* (UCM) configurations for the card.
*
* Possible card long names may be:
* DellInc.-XPS139343-01-0310JH
* ASUSTeKCOMPUTERINC.-T100TA-1.0-T100TA
* Circuitco-MinnowboardMaxD0PLATFORM-D0-MinnowBoardMAX
*
* This function also supports flavoring the card longname to provide
* the extra differentiation, like "vendor-product-version-board-flavor".
*
* We only keep number and alphabet characters and a few separator characters
* in the card long name since UCM in the user space uses the card long names
* as card configuration directory names and AudoConf cannot support special
* charactors like SPACE.
*
* Returns 0 on success, otherwise a negative error code.
*/
int snd_soc_set_dmi_name(struct snd_soc_card *card, const char *flavour)
{
const char *vendor, *product, *product_version, *board;
if (card->long_name)
return 0; /* long name already set by driver or from DMI */
/* make up dmi long name as: vendor-product-version-board */
vendor = dmi_get_system_info(DMI_BOARD_VENDOR);
if (!vendor || !is_dmi_valid(vendor)) {
dev_warn(card->dev, "ASoC: no DMI vendor name!\n");
return 0;
}
snprintf(card->dmi_longname, sizeof(card->dmi_longname), "%s", vendor);
cleanup_dmi_name(card->dmi_longname);
product = dmi_get_system_info(DMI_PRODUCT_NAME);
if (product && is_dmi_valid(product)) {
append_dmi_string(card, product);
/*
* some vendors like Lenovo may only put a self-explanatory
* name in the product version field
*/
product_version = dmi_get_system_info(DMI_PRODUCT_VERSION);
if (product_version && is_dmi_valid(product_version))
append_dmi_string(card, product_version);
}
board = dmi_get_system_info(DMI_BOARD_NAME);
if (board && is_dmi_valid(board)) {
if (!product || strcasecmp(board, product))
append_dmi_string(card, board);
} else if (!product) {
/* fall back to using legacy name */
dev_warn(card->dev, "ASoC: no DMI board/product name!\n");
return 0;
}
/* Add flavour to dmi long name */
if (flavour)
append_dmi_string(card, flavour);
/* set the card long name */
card->long_name = card->dmi_longname;
return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_set_dmi_name);
#endif /* CONFIG_DMI */
static void soc_check_tplg_fes(struct snd_soc_card *card)
{
struct snd_soc_component *component;
const struct snd_soc_component_driver *comp_drv;
struct snd_soc_dai_link *dai_link;
int i;
for_each_component(component) {
/* does this component override BEs ? */
if (!component->driver->ignore_machine)
continue;
/* for this machine ? */
if (!strcmp(component->driver->ignore_machine,
card->dev->driver->name))
goto match;
if (strcmp(component->driver->ignore_machine,
dev_name(card->dev)))
continue;
match:
/* machine matches, so override the rtd data */
for_each_card_prelinks(card, i, dai_link) {
/* ignore this FE */
if (dai_link->dynamic) {
dai_link->ignore = true;
continue;
}
dev_info(card->dev, "info: override BE DAI link %s\n",
card->dai_link[i].name);
/* override platform component */
if (!dai_link->platforms) {
dev_err(card->dev, "init platform error");
continue;
}
dai_link->platforms->name = component->name;
/* convert non BE into BE */
dai_link->no_pcm = 1;
/* override any BE fixups */
dai_link->be_hw_params_fixup =
component->driver->be_hw_params_fixup;
/*
* most BE links don't set stream name, so set it to
* dai link name if it's NULL to help bind widgets.
*/
if (!dai_link->stream_name)
dai_link->stream_name = dai_link->name;
}
/* Inform userspace we are using alternate topology */
if (component->driver->topology_name_prefix) {
/* topology shortname created? */
if (!card->topology_shortname_created) {
comp_drv = component->driver;
snprintf(card->topology_shortname, 32, "%s-%s",
comp_drv->topology_name_prefix,
card->name);
card->topology_shortname_created = true;
}
/* use topology shortname */
card->name = card->topology_shortname;
}
}
}
#define soc_setup_card_name(name, name1, name2, norm) \
__soc_setup_card_name(name, sizeof(name), name1, name2, norm)
static void __soc_setup_card_name(char *name, int len,
const char *name1, const char *name2,
int normalization)
{
int i;
snprintf(name, len, "%s", name1 ? name1 : name2);
if (!normalization)
return;
/*
* Name normalization
*
* The driver name is somewhat special, as it's used as a key for
* searches in the user-space.
*
* ex)
* "abcd??efg" -> "abcd__efg"
*/
for (i = 0; i < len; i++) {
switch (name[i]) {
case '_':
case '-':
case '\0':
break;
default:
if (!isalnum(name[i]))
name[i] = '_';
break;
}
}
}
static void soc_cleanup_card_resources(struct snd_soc_card *card,
int card_probed)
{
struct snd_soc_dai_link *link, *_link;
if (card->snd_card)
snd_card_disconnect_sync(card->snd_card);
snd_soc_dapm_shutdown(card);
/* remove and free each DAI */
soc_remove_link_dais(card);
soc_remove_link_components(card);
for_each_card_links_safe(card, link, _link)
snd_soc_remove_dai_link(card, link);
/* remove auxiliary devices */
soc_remove_aux_devices(card);
soc_unbind_aux_dev(card);
snd_soc_dapm_free(&card->dapm);
soc_cleanup_card_debugfs(card);
/* remove the card */
if (card_probed && card->remove)
card->remove(card);
if (card->snd_card) {
snd_card_free(card->snd_card);
card->snd_card = NULL;
}
}
static void snd_soc_unbind_card(struct snd_soc_card *card, bool unregister)
{
if (card->instantiated) {
int card_probed = 1;
card->instantiated = false;
snd_soc_flush_all_delayed_work(card);
soc_cleanup_card_resources(card, card_probed);
if (!unregister)
list_add(&card->list, &unbind_card_list);
} else {
if (unregister)
list_del(&card->list);
}
}
static int snd_soc_bind_card(struct snd_soc_card *card)
{
struct snd_soc_pcm_runtime *rtd;
struct snd_soc_dai_link *dai_link;
int ret, i, card_probed = 0;
mutex_lock(&client_mutex);
mutex_lock_nested(&card->mutex, SND_SOC_CARD_CLASS_INIT);
snd_soc_dapm_init(&card->dapm, card, NULL);
/* check whether any platform is ignore machine FE and using topology */
soc_check_tplg_fes(card);
/* bind aux_devs too */
ret = soc_bind_aux_dev(card);
if (ret < 0)
goto probe_end;
/* add predefined DAI links to the list */
card->num_rtd = 0;
for_each_card_prelinks(card, i, dai_link) {
ret = snd_soc_add_dai_link(card, dai_link);
if (ret < 0)
goto probe_end;
}
/* card bind complete so register a sound card */
ret = snd_card_new(card->dev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1,
card->owner, 0, &card->snd_card);
if (ret < 0) {
dev_err(card->dev,
"ASoC: can't create sound card for card %s: %d\n",
card->name, ret);
goto probe_end;
}
soc_init_card_debugfs(card);
soc_resume_init(card);
ret = snd_soc_dapm_new_controls(&card->dapm, card->dapm_widgets,
card->num_dapm_widgets);
if (ret < 0)
goto probe_end;
ret = snd_soc_dapm_new_controls(&card->dapm, card->of_dapm_widgets,
card->num_of_dapm_widgets);
if (ret < 0)
goto probe_end;
/* initialise the sound card only once */
if (card->probe) {
ret = card->probe(card);
if (ret < 0)
goto probe_end;
card_probed = 1;
}
/* probe all components used by DAI links on this card */
ret = soc_probe_link_components(card);
if (ret < 0) {
dev_err(card->dev,
"ASoC: failed to instantiate card %d\n", ret);
goto probe_end;
}
/* probe auxiliary components */
ret = soc_probe_aux_devices(card);
if (ret < 0) {
dev_err(card->dev,
"ASoC: failed to probe aux component %d\n", ret);
goto probe_end;
}
/* probe all DAI links on this card */
ret = soc_probe_link_dais(card);
if (ret < 0) {
dev_err(card->dev,
"ASoC: failed to instantiate card %d\n", ret);
goto probe_end;
}
for_each_card_rtds(card, rtd)
soc_link_init(card, rtd);
snd_soc_dapm_link_dai_widgets(card);
snd_soc_dapm_connect_dai_link_widgets(card);
ret = snd_soc_add_card_controls(card, card->controls,
card->num_controls);
if (ret < 0)
goto probe_end;
ret = snd_soc_dapm_add_routes(&card->dapm, card->dapm_routes,
card->num_dapm_routes);
if (ret < 0)
goto probe_end;
ret = snd_soc_dapm_add_routes(&card->dapm, card->of_dapm_routes,
card->num_of_dapm_routes);
if (ret < 0)
goto probe_end;
/* try to set some sane longname if DMI is available */
snd_soc_set_dmi_name(card, NULL);
soc_setup_card_name(card->snd_card->shortname,
card->name, NULL, 0);
soc_setup_card_name(card->snd_card->longname,
card->long_name, card->name, 0);
soc_setup_card_name(card->snd_card->driver,
card->driver_name, card->name, 1);
if (card->components) {
/* the current implementation of snd_component_add() accepts */
/* multiple components in the string separated by space, */
/* but the string collision (identical string) check might */
/* not work correctly */
ret = snd_component_add(card->snd_card, card->components);
if (ret < 0) {
dev_err(card->dev, "ASoC: %s snd_component_add() failed: %d\n",
card->name, ret);
goto probe_end;
}
}
if (card->late_probe) {
ret = card->late_probe(card);
if (ret < 0) {
dev_err(card->dev, "ASoC: %s late_probe() failed: %d\n",
card->name, ret);
goto probe_end;
}
}
card_probed = 1;
snd_soc_dapm_new_widgets(card);
ret = snd_card_register(card->snd_card);
if (ret < 0) {
dev_err(card->dev, "ASoC: failed to register soundcard %d\n",
ret);
goto probe_end;
}
card->instantiated = 1;
dapm_mark_endpoints_dirty(card);
snd_soc_dapm_sync(&card->dapm);
/* deactivate pins to sleep state */
for_each_card_rtds(card, rtd) {
struct snd_soc_dai *dai;
for_each_rtd_codec_dai(rtd, i, dai) {
if (!dai->active)
pinctrl_pm_select_sleep_state(dai->dev);
}
if (!rtd->cpu_dai->active)
pinctrl_pm_select_sleep_state(rtd->cpu_dai->dev);
}
probe_end:
if (ret < 0)
soc_cleanup_card_resources(card, card_probed);
mutex_unlock(&card->mutex);
mutex_unlock(&client_mutex);
return ret;
}
/* probes a new socdev */
static int soc_probe(struct platform_device *pdev)
{
struct snd_soc_card *card = platform_get_drvdata(pdev);
/*
* no card, so machine driver should be registering card
* we should not be here in that case so ret error
*/
if (!card)
return -EINVAL;
dev_warn(&pdev->dev,
"ASoC: machine %s should use snd_soc_register_card()\n",
card->name);
/* Bodge while we unpick instantiation */
card->dev = &pdev->dev;
return snd_soc_register_card(card);
}
/* removes a socdev */
static int soc_remove(struct platform_device *pdev)
{
struct snd_soc_card *card = platform_get_drvdata(pdev);
snd_soc_unregister_card(card);
return 0;
}
int snd_soc_poweroff(struct device *dev)
{
struct snd_soc_card *card = dev_get_drvdata(dev);
struct snd_soc_pcm_runtime *rtd;
if (!card->instantiated)
return 0;
/*
* Flush out pmdown_time work - we actually do want to run it
* now, we're shutting down so no imminent restart.
*/
snd_soc_flush_all_delayed_work(card);
snd_soc_dapm_shutdown(card);
/* deactivate pins to sleep state */
for_each_card_rtds(card, rtd) {
struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
struct snd_soc_dai *codec_dai;
int i;
pinctrl_pm_select_sleep_state(cpu_dai->dev);
for_each_rtd_codec_dai(rtd, i, codec_dai) {
pinctrl_pm_select_sleep_state(codec_dai->dev);
}
}
return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_poweroff);
const struct dev_pm_ops snd_soc_pm_ops = {
.suspend = snd_soc_suspend,
.resume = snd_soc_resume,
.freeze = snd_soc_suspend,
.thaw = snd_soc_resume,
.poweroff = snd_soc_poweroff,
.restore = snd_soc_resume,
};
EXPORT_SYMBOL_GPL(snd_soc_pm_ops);
/* ASoC platform driver */
static struct platform_driver soc_driver = {
.driver = {
.name = "soc-audio",
.pm = &snd_soc_pm_ops,
},
.probe = soc_probe,
.remove = soc_remove,
};
/**
* snd_soc_cnew - create new control
* @_template: control template
* @data: control private data
* @long_name: control long name
* @prefix: control name prefix
*
* Create a new mixer control from a template control.
*
* Returns 0 for success, else error.
*/
struct snd_kcontrol *snd_soc_cnew(const struct snd_kcontrol_new *_template,
void *data, const char *long_name,
const char *prefix)
{
struct snd_kcontrol_new template;
struct snd_kcontrol *kcontrol;
char *name = NULL;
memcpy(&template, _template, sizeof(template));
template.index = 0;
if (!long_name)
long_name = template.name;
if (prefix) {
name = kasprintf(GFP_KERNEL, "%s %s", prefix, long_name);
if (!name)
return NULL;
template.name = name;
} else {
template.name = long_name;
}
kcontrol = snd_ctl_new1(&template, data);
kfree(name);
return kcontrol;
}
EXPORT_SYMBOL_GPL(snd_soc_cnew);
static int snd_soc_add_controls(struct snd_card *card, struct device *dev,
const struct snd_kcontrol_new *controls, int num_controls,
const char *prefix, void *data)
{
int err, i;
for (i = 0; i < num_controls; i++) {
const struct snd_kcontrol_new *control = &controls[i];
err = snd_ctl_add(card, snd_soc_cnew(control, data,
control->name, prefix));
if (err < 0) {
dev_err(dev, "ASoC: Failed to add %s: %d\n",
control->name, err);
return err;
}
}
return 0;
}
struct snd_kcontrol *snd_soc_card_get_kcontrol(struct snd_soc_card *soc_card,
const char *name)
{
struct snd_card *card = soc_card->snd_card;
struct snd_kcontrol *kctl;
if (unlikely(!name))
return NULL;
list_for_each_entry(kctl, &card->controls, list)
if (!strncmp(kctl->id.name, name, sizeof(kctl->id.name)))
return kctl;
return NULL;
}
EXPORT_SYMBOL_GPL(snd_soc_card_get_kcontrol);
/**
* snd_soc_add_component_controls - Add an array of controls to a component.
*
* @component: Component to add controls to
* @controls: Array of controls to add
* @num_controls: Number of elements in the array
*
* Return: 0 for success, else error.
*/
int snd_soc_add_component_controls(struct snd_soc_component *component,
const struct snd_kcontrol_new *controls, unsigned int num_controls)
{
struct snd_card *card = component->card->snd_card;
return snd_soc_add_controls(card, component->dev, controls,
num_controls, component->name_prefix, component);
}
EXPORT_SYMBOL_GPL(snd_soc_add_component_controls);
/**
* snd_soc_add_card_controls - add an array of controls to a SoC card.
* Convenience function to add a list of controls.
*
* @soc_card: SoC card to add controls to
* @controls: array of controls to add
* @num_controls: number of elements in the array
*
* Return 0 for success, else error.
*/
int snd_soc_add_card_controls(struct snd_soc_card *soc_card,
const struct snd_kcontrol_new *controls, int num_controls)
{
struct snd_card *card = soc_card->snd_card;
return snd_soc_add_controls(card, soc_card->dev, controls, num_controls,
NULL, soc_card);
}
EXPORT_SYMBOL_GPL(snd_soc_add_card_controls);
/**
* snd_soc_add_dai_controls - add an array of controls to a DAI.
* Convienience function to add a list of controls.
*
* @dai: DAI to add controls to
* @controls: array of controls to add
* @num_controls: number of elements in the array
*
* Return 0 for success, else error.
*/
int snd_soc_add_dai_controls(struct snd_soc_dai *dai,
const struct snd_kcontrol_new *controls, int num_controls)
{
struct snd_card *card = dai->component->card->snd_card;
return snd_soc_add_controls(card, dai->dev, controls, num_controls,
NULL, dai);
}
EXPORT_SYMBOL_GPL(snd_soc_add_dai_controls);
/**
* snd_soc_register_card - Register a card with the ASoC core
*
* @card: Card to register
*
*/
int snd_soc_register_card(struct snd_soc_card *card)
{
if (!card->name || !card->dev)
return -EINVAL;
dev_set_drvdata(card->dev, card);
INIT_LIST_HEAD(&card->widgets);
INIT_LIST_HEAD(&card->paths);
INIT_LIST_HEAD(&card->dapm_list);
INIT_LIST_HEAD(&card->aux_comp_list);
INIT_LIST_HEAD(&card->component_dev_list);
INIT_LIST_HEAD(&card->list);
INIT_LIST_HEAD(&card->dai_link_list);
INIT_LIST_HEAD(&card->rtd_list);
INIT_LIST_HEAD(&card->dapm_dirty);
INIT_LIST_HEAD(&card->dobj_list);
card->instantiated = 0;
mutex_init(&card->mutex);
mutex_init(&card->dapm_mutex);
mutex_init(&card->pcm_mutex);
spin_lock_init(&card->dpcm_lock);
return snd_soc_bind_card(card);
}
EXPORT_SYMBOL_GPL(snd_soc_register_card);
/**
* snd_soc_unregister_card - Unregister a card with the ASoC core
*
* @card: Card to unregister
*
*/
int snd_soc_unregister_card(struct snd_soc_card *card)
{
mutex_lock(&client_mutex);
snd_soc_unbind_card(card, true);
mutex_unlock(&client_mutex);
dev_dbg(card->dev, "ASoC: Unregistered card '%s'\n", card->name);
return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_unregister_card);
/*
* Simplify DAI link configuration by removing ".-1" from device names
* and sanitizing names.
*/
static char *fmt_single_name(struct device *dev, int *id)
{
char *found, name[NAME_SIZE];
int id1, id2;
if (dev_name(dev) == NULL)
return NULL;
strlcpy(name, dev_name(dev), NAME_SIZE);
/* are we a "%s.%d" name (platform and SPI components) */
found = strstr(name, dev->driver->name);
if (found) {
/* get ID */
if (sscanf(&found[strlen(dev->driver->name)], ".%d", id) == 1) {
/* discard ID from name if ID == -1 */
if (*id == -1)
found[strlen(dev->driver->name)] = '\0';
}
} else {
/* I2C component devices are named "bus-addr" */
if (sscanf(name, "%x-%x", &id1, &id2) == 2) {
char tmp[NAME_SIZE];
/* create unique ID number from I2C addr and bus */
*id = ((id1 & 0xffff) << 16) + id2;
/* sanitize component name for DAI link creation */
snprintf(tmp, NAME_SIZE, "%s.%s", dev->driver->name,
name);
strlcpy(name, tmp, NAME_SIZE);
} else
*id = 0;
}
return devm_kstrdup(dev, name, GFP_KERNEL);
}
/*
* Simplify DAI link naming for single devices with multiple DAIs by removing
* any ".-1" and using the DAI name (instead of device name).
*/
static inline char *fmt_multiple_name(struct device *dev,
struct snd_soc_dai_driver *dai_drv)
{
if (dai_drv->name == NULL) {
dev_err(dev,
"ASoC: error - multiple DAI %s registered with no name\n",
dev_name(dev));
return NULL;
}
return devm_kstrdup(dev, dai_drv->name, GFP_KERNEL);
}
void snd_soc_unregister_dai(struct snd_soc_dai *dai)
{
dev_dbg(dai->dev, "ASoC: Unregistered DAI '%s'\n", dai->name);
list_del(&dai->list);
}
EXPORT_SYMBOL_GPL(snd_soc_unregister_dai);
/**
* snd_soc_register_dai - Register a DAI dynamically & create its widgets
*
* @component: The component the DAIs are registered for
* @dai_drv: DAI driver to use for the DAI
*
* Topology can use this API to register DAIs when probing a component.
* These DAIs's widgets will be freed in the card cleanup and the DAIs
* will be freed in the component cleanup.
*/
struct snd_soc_dai *snd_soc_register_dai(struct snd_soc_component *component,
struct snd_soc_dai_driver *dai_drv,
bool legacy_dai_naming)
{
struct device *dev = component->dev;
struct snd_soc_dai *dai;
dev_dbg(dev, "ASoC: dynamically register DAI %s\n", dev_name(dev));
lockdep_assert_held(&client_mutex);
dai = devm_kzalloc(dev, sizeof(*dai), GFP_KERNEL);
if (dai == NULL)
return NULL;
/*
* Back in the old days when we still had component-less DAIs,
* instead of having a static name, component-less DAIs would
* inherit the name of the parent device so it is possible to
* register multiple instances of the DAI. We still need to keep
* the same naming style even though those DAIs are not
* component-less anymore.
*/
if (legacy_dai_naming &&
(dai_drv->id == 0 || dai_drv->name == NULL)) {
dai->name = fmt_single_name(dev, &dai->id);
} else {
dai->name = fmt_multiple_name(dev, dai_drv);
if (dai_drv->id)
dai->id = dai_drv->id;
else
dai->id = component->num_dai;
}
if (!dai->name)
return NULL;
dai->component = component;
dai->dev = dev;
dai->driver = dai_drv;
if (!dai->driver->ops)
dai->driver->ops = &null_dai_ops;
/* see for_each_component_dais */
list_add_tail(&dai->list, &component->dai_list);
component->num_dai++;
dev_dbg(dev, "ASoC: Registered DAI '%s'\n", dai->name);
return dai;
}
/**
* snd_soc_unregister_dai - Unregister DAIs from the ASoC core
*
* @component: The component for which the DAIs should be unregistered
*/
static void snd_soc_unregister_dais(struct snd_soc_component *component)
{
struct snd_soc_dai *dai, *_dai;
for_each_component_dais_safe(component, dai, _dai)
snd_soc_unregister_dai(dai);
}
/**
* snd_soc_register_dais - Register a DAI with the ASoC core
*
* @component: The component the DAIs are registered for
* @dai_drv: DAI driver to use for the DAIs
* @count: Number of DAIs
*/
static int snd_soc_register_dais(struct snd_soc_component *component,
struct snd_soc_dai_driver *dai_drv,
size_t count)
{
struct snd_soc_dai *dai;
unsigned int i;
int ret;
for (i = 0; i < count; i++) {
dai = snd_soc_register_dai(component, dai_drv + i, count == 1 &&
!component->driver->non_legacy_dai_naming);
if (dai == NULL) {
ret = -ENOMEM;
goto err;
}
}
return 0;
err:
snd_soc_unregister_dais(component);
return ret;
}
static int snd_soc_component_initialize(struct snd_soc_component *component,
const struct snd_soc_component_driver *driver, struct device *dev)
{
INIT_LIST_HEAD(&component->dai_list);
INIT_LIST_HEAD(&component->dobj_list);
INIT_LIST_HEAD(&component->card_list);
mutex_init(&component->io_mutex);
component->name = fmt_single_name(dev, &component->id);
if (!component->name) {
dev_err(dev, "ASoC: Failed to allocate name\n");
return -ENOMEM;
}
component->dev = dev;
component->driver = driver;
return 0;
}
static void snd_soc_component_setup_regmap(struct snd_soc_component *component)
{
int val_bytes = regmap_get_val_bytes(component->regmap);
/* Errors are legitimate for non-integer byte multiples */
if (val_bytes > 0)
component->val_bytes = val_bytes;
}
#ifdef CONFIG_REGMAP
/**
* snd_soc_component_init_regmap() - Initialize regmap instance for the
* component
* @component: The component for which to initialize the regmap instance
* @regmap: The regmap instance that should be used by the component
*
* This function allows deferred assignment of the regmap instance that is
* associated with the component. Only use this if the regmap instance is not
* yet ready when the component is registered. The function must also be called
* before the first IO attempt of the component.
*/
void snd_soc_component_init_regmap(struct snd_soc_component *component,
struct regmap *regmap)
{
component->regmap = regmap;
snd_soc_component_setup_regmap(component);
}
EXPORT_SYMBOL_GPL(snd_soc_component_init_regmap);
/**
* snd_soc_component_exit_regmap() - De-initialize regmap instance for the
* component
* @component: The component for which to de-initialize the regmap instance
*
* Calls regmap_exit() on the regmap instance associated to the component and
* removes the regmap instance from the component.
*
* This function should only be used if snd_soc_component_init_regmap() was used
* to initialize the regmap instance.
*/
void snd_soc_component_exit_regmap(struct snd_soc_component *component)
{
regmap_exit(component->regmap);
component->regmap = NULL;
}
EXPORT_SYMBOL_GPL(snd_soc_component_exit_regmap);
#endif
#define ENDIANNESS_MAP(name) \
(SNDRV_PCM_FMTBIT_##name##LE | SNDRV_PCM_FMTBIT_##name##BE)
static u64 endianness_format_map[] = {
ENDIANNESS_MAP(S16_),
ENDIANNESS_MAP(U16_),
ENDIANNESS_MAP(S24_),
ENDIANNESS_MAP(U24_),
ENDIANNESS_MAP(S32_),
ENDIANNESS_MAP(U32_),
ENDIANNESS_MAP(S24_3),
ENDIANNESS_MAP(U24_3),
ENDIANNESS_MAP(S20_3),
ENDIANNESS_MAP(U20_3),
ENDIANNESS_MAP(S18_3),
ENDIANNESS_MAP(U18_3),
ENDIANNESS_MAP(FLOAT_),
ENDIANNESS_MAP(FLOAT64_),
ENDIANNESS_MAP(IEC958_SUBFRAME_),
};
/*
* Fix up the DAI formats for endianness: codecs don't actually see
* the endianness of the data but we're using the CPU format
* definitions which do need to include endianness so we ensure that
* codec DAIs always have both big and little endian variants set.
*/
static void convert_endianness_formats(struct snd_soc_pcm_stream *stream)
{
int i;
for (i = 0; i < ARRAY_SIZE(endianness_format_map); i++)
if (stream->formats & endianness_format_map[i])
stream->formats |= endianness_format_map[i];
}
static void snd_soc_try_rebind_card(void)
{
struct snd_soc_card *card, *c;
list_for_each_entry_safe(card, c, &unbind_card_list, list)
if (!snd_soc_bind_card(card))
list_del(&card->list);
}
static void snd_soc_del_component_unlocked(struct snd_soc_component *component)
{
struct snd_soc_card *card = component->card;
snd_soc_unregister_dais(component);
if (card)
snd_soc_unbind_card(card, false);
list_del(&component->list);
}
int snd_soc_add_component(struct device *dev,
struct snd_soc_component *component,
const struct snd_soc_component_driver *component_driver,
struct snd_soc_dai_driver *dai_drv,
int num_dai)
{
int ret;
int i;
mutex_lock(&client_mutex);
ret = snd_soc_component_initialize(component, component_driver, dev);
if (ret)
goto err_free;
if (component_driver->endianness) {
for (i = 0; i < num_dai; i++) {
convert_endianness_formats(&dai_drv[i].playback);
convert_endianness_formats(&dai_drv[i].capture);
}
}
ret = snd_soc_register_dais(component, dai_drv, num_dai);
if (ret < 0) {
dev_err(dev, "ASoC: Failed to register DAIs: %d\n", ret);
goto err_cleanup;
}
if (!component->driver->write && !component->driver->read) {
if (!component->regmap)
component->regmap = dev_get_regmap(component->dev,
NULL);
if (component->regmap)
snd_soc_component_setup_regmap(component);
}
/* see for_each_component */
list_add(&component->list, &component_list);
err_cleanup:
if (ret < 0)
snd_soc_del_component_unlocked(component);
err_free:
mutex_unlock(&client_mutex);
if (ret == 0)
snd_soc_try_rebind_card();
return ret;
}
EXPORT_SYMBOL_GPL(snd_soc_add_component);
int snd_soc_register_component(struct device *dev,
const struct snd_soc_component_driver *component_driver,
struct snd_soc_dai_driver *dai_drv,
int num_dai)
{
struct snd_soc_component *component;
component = devm_kzalloc(dev, sizeof(*component), GFP_KERNEL);
if (!component)
return -ENOMEM;
return snd_soc_add_component(dev, component, component_driver,
dai_drv, num_dai);
}
EXPORT_SYMBOL_GPL(snd_soc_register_component);
/**
* snd_soc_unregister_component - Unregister all related component
* from the ASoC core
*
* @dev: The device to unregister
*/
void snd_soc_unregister_component(struct device *dev)
{
struct snd_soc_component *component;
mutex_lock(&client_mutex);
while (1) {
component = snd_soc_lookup_component_nolocked(dev, NULL);
if (!component)
break;
snd_soc_del_component_unlocked(component);
}
mutex_unlock(&client_mutex);
}
EXPORT_SYMBOL_GPL(snd_soc_unregister_component);
/* Retrieve a card's name from device tree */
int snd_soc_of_parse_card_name(struct snd_soc_card *card,
const char *propname)
{
struct device_node *np;
int ret;
if (!card->dev) {
pr_err("card->dev is not set before calling %s\n", __func__);
return -EINVAL;
}
np = card->dev->of_node;
ret = of_property_read_string_index(np, propname, 0, &card->name);
/*
* EINVAL means the property does not exist. This is fine providing
* card->name was previously set, which is checked later in
* snd_soc_register_card.
*/
if (ret < 0 && ret != -EINVAL) {
dev_err(card->dev,
"ASoC: Property '%s' could not be read: %d\n",
propname, ret);
return ret;
}
return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_of_parse_card_name);
static const struct snd_soc_dapm_widget simple_widgets[] = {
SND_SOC_DAPM_MIC("Microphone", NULL),
SND_SOC_DAPM_LINE("Line", NULL),
SND_SOC_DAPM_HP("Headphone", NULL),
SND_SOC_DAPM_SPK("Speaker", NULL),
};
int snd_soc_of_parse_audio_simple_widgets(struct snd_soc_card *card,
const char *propname)
{
struct device_node *np = card->dev->of_node;
struct snd_soc_dapm_widget *widgets;
const char *template, *wname;
int i, j, num_widgets, ret;
num_widgets = of_property_count_strings(np, propname);
if (num_widgets < 0) {
dev_err(card->dev,
"ASoC: Property '%s' does not exist\n", propname);
return -EINVAL;
}
if (num_widgets & 1) {
dev_err(card->dev,
"ASoC: Property '%s' length is not even\n", propname);
return -EINVAL;
}
num_widgets /= 2;
if (!num_widgets) {
dev_err(card->dev, "ASoC: Property '%s's length is zero\n",
propname);
return -EINVAL;
}
widgets = devm_kcalloc(card->dev, num_widgets, sizeof(*widgets),
GFP_KERNEL);
if (!widgets) {
dev_err(card->dev,
"ASoC: Could not allocate memory for widgets\n");
return -ENOMEM;
}
for (i = 0; i < num_widgets; i++) {
ret = of_property_read_string_index(np, propname,
2 * i, &template);
if (ret) {
dev_err(card->dev,
"ASoC: Property '%s' index %d read error:%d\n",
propname, 2 * i, ret);
return -EINVAL;
}
for (j = 0; j < ARRAY_SIZE(simple_widgets); j++) {
if (!strncmp(template, simple_widgets[j].name,
strlen(simple_widgets[j].name))) {
widgets[i] = simple_widgets[j];
break;
}
}
if (j >= ARRAY_SIZE(simple_widgets)) {
dev_err(card->dev,
"ASoC: DAPM widget '%s' is not supported\n",
template);
return -EINVAL;
}
ret = of_property_read_string_index(np, propname,
(2 * i) + 1,
&wname);
if (ret) {
dev_err(card->dev,
"ASoC: Property '%s' index %d read error:%d\n",
propname, (2 * i) + 1, ret);
return -EINVAL;
}
widgets[i].name = wname;
}
card->of_dapm_widgets = widgets;