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linux-zen-server/sound/soc/soc-core.c

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Initial commit
2023-08-30 17:53:23 +02:00
// 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 <linux/acpi.h>
#include <sound/core.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/soc-link.h>
#include <sound/initval.h>
#define CREATE_TRACE_POINTS
#include <trace/events/asoc.h>
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)");
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 sysfs_emit(buf, "%ld\n", rtd->pmdown_time);
}
static ssize_t pmdown_time_store(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_RW(pmdown_time);
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->dai_link->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
struct dentry *snd_soc_debugfs_root;
EXPORT_SYMBOL_GPL(snd_soc_debugfs_root);
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
static int snd_soc_rtd_add_component(struct snd_soc_pcm_runtime *rtd,
struct snd_soc_component *component)
{
struct snd_soc_component *comp;
int i;
for_each_rtd_components(rtd, i, comp) {
/* already connected */
if (comp == component)
return 0;
}
/* see for_each_rtd_components */
rtd->components[rtd->num_components] = component;
rtd->num_components++;
return 0;
}
struct snd_soc_component *snd_soc_rtdcom_lookup(struct snd_soc_pcm_runtime *rtd,
const char *driver_name)
{
struct snd_soc_component *component;
int i;
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, i, component) {
const char *component_name = component->driver->name;
if (!component_name)
continue;
if ((component_name == driver_name) ||
strcmp(component_name, driver_name) == 0)
return component;
}
return NULL;
}
EXPORT_SYMBOL_GPL(snd_soc_rtdcom_lookup);
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;
}
EXPORT_SYMBOL_GPL(snd_soc_lookup_component_nolocked);
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_soc_pcm_runtime
*snd_soc_get_pcm_runtime(struct snd_soc_card *card,
struct snd_soc_dai_link *dai_link)
{
struct snd_soc_pcm_runtime *rtd;
for_each_card_rtds(card, rtd) {
if (rtd->dai_link == dai_link)
return rtd;
}
dev_dbg(card->dev, "ASoC: failed to find rtd %s\n", dai_link->name);
return NULL;
}
EXPORT_SYMBOL_GPL(snd_soc_get_pcm_runtime);
/*
* Power down the audio subsystem pmdown_time msecs after close is called.
* This is to ensure there are no pops or clicks in between any music tracks
* due to DAPM power cycling.
*/
void snd_soc_close_delayed_work(struct snd_soc_pcm_runtime *rtd)
{
struct snd_soc_dai *codec_dai = asoc_rtd_to_codec(rtd, 0);
int playback = SNDRV_PCM_STREAM_PLAYBACK;
mutex_lock_nested(&rtd->card->pcm_mutex, rtd->card->pcm_subclass);
dev_dbg(rtd->dev,
"ASoC: pop wq checking: %s status: %s waiting: %s\n",
codec_dai->driver->playback.stream_name,
snd_soc_dai_stream_active(codec_dai, playback) ?
"active" : "inactive",
rtd->pop_wait ? "yes" : "no");
/* are we waiting on this codec DAI stream */
if (rtd->pop_wait == 1) {
rtd->pop_wait = 0;
snd_soc_dapm_stream_event(rtd, playback,
SND_SOC_DAPM_STREAM_STOP);
}
mutex_unlock(&rtd->card->pcm_mutex);
}
EXPORT_SYMBOL_GPL(snd_soc_close_delayed_work);
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);
if (delayed_work_pending(&rtd->delayed_work))
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()
*
* We don't need to mind freeing for rtd,
* because it was created from dev (= rtd->dev)
* see
* soc_new_pcm_runtime()
*
* rtd = devm_kzalloc(dev, ...);
* rtd->dev = dev
*/
device_unregister(rtd->dev);
}
static void close_delayed_work(struct work_struct *work) {
struct snd_soc_pcm_runtime *rtd =
container_of(work, struct snd_soc_pcm_runtime,
delayed_work.work);
if (rtd->close_delayed_work_func)
rtd->close_delayed_work_func(rtd);
}
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 snd_soc_component *component;
struct device *dev;
int ret;
int stream;
/*
* 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_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) +
sizeof(component) * (dai_link->num_cpus +
dai_link->num_codecs +
dai_link->num_platforms),
GFP_KERNEL);
if (!rtd) {
device_unregister(dev);
return NULL;
}
rtd->dev = dev;
INIT_LIST_HEAD(&rtd->list);
for_each_pcm_streams(stream) {
INIT_LIST_HEAD(&rtd->dpcm[stream].be_clients);
INIT_LIST_HEAD(&rtd->dpcm[stream].fe_clients);
}
dev_set_drvdata(dev, rtd);
INIT_DELAYED_WORK(&rtd->delayed_work, close_delayed_work);
/*
* for rtd->dais
*/
rtd->dais = devm_kcalloc(dev, dai_link->num_cpus + dai_link->num_codecs,
sizeof(struct snd_soc_dai *),
GFP_KERNEL);
if (!rtd->dais)
goto free_rtd;
/*
* dais = [][][][][][][][][][][][][][][][][][]
* ^cpu_dais ^codec_dais
* |--- num_cpus ---|--- num_codecs --|
* see
* asoc_rtd_to_cpu()
* asoc_rtd_to_codec()
*/
rtd->card = card;
rtd->dai_link = dai_link;
rtd->num = card->num_rtd++;
rtd->pmdown_time = pmdown_time; /* default power off timeout */
/* see for_each_card_rtds */
list_add_tail(&rtd->list, &card->rtd_list);
ret = device_add_groups(dev, soc_dev_attr_groups);
if (ret < 0)
goto free_rtd;
return rtd;
free_rtd:
soc_free_pcm_runtime(rtd);
return NULL;
}
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
static void soc_playback_digital_mute(struct snd_soc_card *card, int mute)
{
struct snd_soc_pcm_runtime *rtd;
struct snd_soc_dai *dai;
int playback = SNDRV_PCM_STREAM_PLAYBACK;
int i;
for_each_card_rtds(card, rtd) {
if (rtd->dai_link->ignore_suspend)
continue;
for_each_rtd_dais(rtd, i, dai) {
if (snd_soc_dai_stream_active(dai, playback))
snd_soc_dai_digital_mute(dai, mute, playback);
}
}
}
static void soc_dapm_suspend_resume(struct snd_soc_card *card, int event)
{
struct snd_soc_pcm_runtime *rtd;
int stream;
for_each_card_rtds(card, rtd) {
if (rtd->dai_link->ignore_suspend)
continue;
for_each_pcm_streams(stream)
snd_soc_dapm_stream_event(rtd, stream, event);
}
}
/* 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 (!snd_soc_card_is_instantiated(card))
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);
/* 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 */
soc_playback_digital_mute(card, 1);
/* suspend all pcms */
for_each_card_rtds(card, rtd) {
if (rtd->dai_link->ignore_suspend)
continue;
snd_pcm_suspend_all(rtd->pcm);
}
snd_soc_card_suspend_pre(card);
/* close any waiting streams */
snd_soc_flush_all_delayed_work(card);
soc_dapm_suspend_resume(card, 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_rtds(card, rtd) {
if (rtd->dai_link->ignore_suspend)
continue;
for_each_rtd_components(rtd, i, component) {
struct snd_soc_dapm_context *dapm =
snd_soc_component_get_dapm(component);
/*
* ignore if component was already suspended
*/
if (snd_soc_component_is_suspended(component))
continue;
/*
* If there are paths active then the COMPONENT will be
* held with bias _ON and should not be suspended.
*/
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;
}
fallthrough;
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;
}
}
}
snd_soc_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_component *component;
/*
* 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);
snd_soc_card_resume_pre(card);
for_each_card_components(card, component) {
if (snd_soc_component_is_suspended(component))
snd_soc_component_resume(component);
}
soc_dapm_suspend_resume(card, SND_SOC_DAPM_STREAM_RESUME);
/* unmute any active DACs */
soc_playback_digital_mute(card, 0);
snd_soc_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);
struct snd_soc_component *component;
/* If the card is not initialized yet there is nothing to do */
if (!snd_soc_card_is_instantiated(card))
return 0;
/* activate pins from sleep state */
for_each_card_components(card, component)
if (snd_soc_component_active(component))
pinctrl_pm_select_default_state(component->dev);
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 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);
struct snd_soc_dai *snd_soc_find_dai_with_mutex(
const struct snd_soc_dai_link_component *dlc)
{
struct snd_soc_dai *dai;
mutex_lock(&client_mutex);
dai = snd_soc_find_dai(dlc);
mutex_unlock(&client_mutex);
return dai;
}
EXPORT_SYMBOL_GPL(snd_soc_find_dai_with_mutex);
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 *cpu, *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)) {
dev_dbg(card->dev,
"ASoC: codec component %s not found for link %s\n",
codec->name, link->name);
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)) {
dev_dbg(card->dev,
"ASoC: platform component %s not found for link %s\n",
platform->name, link->name);
return -EPROBE_DEFER;
}
}
for_each_link_cpus(link, i, cpu) {
/*
* 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 (cpu->name && cpu->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 ((cpu->of_node || cpu->name) &&
!soc_find_component(cpu)) {
dev_dbg(card->dev,
"ASoC: cpu component %s not found for link %s\n",
cpu->name, link->name);
return -EPROBE_DEFER;
}
/*
* At least one of CPU DAI name or CPU device name/node must be
* specified
*/
if (!cpu->dai_name &&
!(cpu->name || cpu->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_pcm_runtime - Remove a pcm_runtime from card
* @card: The ASoC card to which the pcm_runtime has
* @rtd: The pcm_runtime to remove
*
* This function removes a pcm_runtime from the ASoC card.
*/
void snd_soc_remove_pcm_runtime(struct snd_soc_card *card,
struct snd_soc_pcm_runtime *rtd)
{
lockdep_assert_held(&client_mutex);
/*
* Notify the machine driver for extra destruction
*/
snd_soc_card_remove_dai_link(card, rtd->dai_link);
soc_free_pcm_runtime(rtd);
}
EXPORT_SYMBOL_GPL(snd_soc_remove_pcm_runtime);
/**
* snd_soc_add_pcm_runtime - Add a pcm_runtime dynamically via dai_link
* @card: The ASoC card to which the pcm_runtime is added
* @dai_link: The DAI link to find pcm_runtime
*
* This function adds a pcm_runtime ASoC card by using dai_link.
*
* Note: Topology can use this API to add pcm_runtime when probing the
* topology component. And machine drivers can still define static
* DAI links in dai_link array.
*/
int snd_soc_add_pcm_runtime(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, *cpu;
struct snd_soc_component *component;
int i, ret;
lockdep_assert_held(&client_mutex);
/*
* Notify the machine driver for extra initialization
*/
ret = snd_soc_card_add_dai_link(card, dai_link);
if (ret < 0)
return ret;
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;
for_each_link_cpus(dai_link, i, cpu) {
asoc_rtd_to_cpu(rtd, i) = snd_soc_find_dai(cpu);
if (!asoc_rtd_to_cpu(rtd, i)) {
dev_info(card->dev, "ASoC: CPU DAI %s not registered\n",
cpu->dai_name);
goto _err_defer;
}
snd_soc_rtd_add_component(rtd, asoc_rtd_to_cpu(rtd, i)->component);
}
/* Find CODEC from registered CODECs */
for_each_link_codecs(dai_link, i, codec) {
asoc_rtd_to_codec(rtd, i) = snd_soc_find_dai(codec);
if (!asoc_rtd_to_codec(rtd, i)) {
dev_info(card->dev, "ASoC: CODEC DAI %s not registered\n",
codec->dai_name);
goto _err_defer;
}
snd_soc_rtd_add_component(rtd, asoc_rtd_to_codec(rtd, i)->component);
}
/* 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_rtd_add_component(rtd, component);
}
}
return 0;
_err_defer:
snd_soc_remove_pcm_runtime(card, rtd);
return -EPROBE_DEFER;
}
EXPORT_SYMBOL_GPL(snd_soc_add_pcm_runtime);
static void snd_soc_runtime_get_dai_fmt(struct snd_soc_pcm_runtime *rtd)
{
struct snd_soc_dai_link *dai_link = rtd->dai_link;
struct snd_soc_dai *dai, *not_used;
struct device *dev = rtd->dev;
u64 pos, possible_fmt;
unsigned int mask = 0, dai_fmt = 0;
int i, j, priority, pri, until;
/*
* Get selectable format from each DAIs.
*
****************************
* NOTE
* Using .auto_selectable_formats is not mandatory,
* we can select format manually from Sound Card.
* When use it, driver should list well tested format only.
****************************
*
* ex)
* auto_selectable_formats (= SND_SOC_POSSIBLE_xxx)
* (A) (B) (C)
* DAI0_: { 0x000F, 0x00F0, 0x0F00 };
* DAI1 : { 0xF000, 0x0F00 };
* (X) (Y)
*
* "until" will be 3 in this case (MAX array size from DAI0 and DAI1)
* Here is dev_dbg() message and comments
*
* priority = 1
* DAI0: (pri, fmt) = (1, 000000000000000F) // 1st check (A) DAI1 is not selected
* DAI1: (pri, fmt) = (0, 0000000000000000) // Necessary Waste
* DAI0: (pri, fmt) = (1, 000000000000000F) // 2nd check (A)
* DAI1: (pri, fmt) = (1, 000000000000F000) // (X)
* priority = 2
* DAI0: (pri, fmt) = (2, 00000000000000FF) // 3rd check (A) + (B)
* DAI1: (pri, fmt) = (1, 000000000000F000) // (X)
* DAI0: (pri, fmt) = (2, 00000000000000FF) // 4th check (A) + (B)
* DAI1: (pri, fmt) = (2, 000000000000FF00) // (X) + (Y)
* priority = 3
* DAI0: (pri, fmt) = (3, 0000000000000FFF) // 5th check (A) + (B) + (C)
* DAI1: (pri, fmt) = (2, 000000000000FF00) // (X) + (Y)
* found auto selected format: 0000000000000F00
*/
until = snd_soc_dai_get_fmt_max_priority(rtd);
for (priority = 1; priority <= until; priority++) {
dev_dbg(dev, "priority = %d\n", priority);
for_each_rtd_dais(rtd, j, not_used) {
possible_fmt = ULLONG_MAX;
for_each_rtd_dais(rtd, i, dai) {
u64 fmt = 0;
pri = (j >= i) ? priority : priority - 1;
fmt = snd_soc_dai_get_fmt(dai, pri);
dev_dbg(dev, "%s: (pri, fmt) = (%d, %016llX)\n", dai->name, pri, fmt);
possible_fmt &= fmt;
}
if (possible_fmt)
goto found;
}
}
/* Not Found */
return;
found:
dev_dbg(dev, "found auto selected format: %016llX\n", possible_fmt);
/*
* convert POSSIBLE_DAIFMT to DAIFMT
*
* Some basic/default settings on each is defined as 0.
* see
* SND_SOC_DAIFMT_NB_NF
* SND_SOC_DAIFMT_GATED
*
* SND_SOC_DAIFMT_xxx_MASK can't notice it if Sound Card specify
* these value, and will be overwrite to auto selected value.
*
* To avoid such issue, loop from 63 to 0 here.
* Small number of SND_SOC_POSSIBLE_xxx will be Hi priority.
* Basic/Default settings of each part and aboves are defined
* as Hi priority (= small number) of SND_SOC_POSSIBLE_xxx.
*/
for (i = 63; i >= 0; i--) {
pos = 1ULL << i;
switch (possible_fmt & pos) {
/*
* for format
*/
case SND_SOC_POSSIBLE_DAIFMT_I2S:
case SND_SOC_POSSIBLE_DAIFMT_RIGHT_J:
case SND_SOC_POSSIBLE_DAIFMT_LEFT_J:
case SND_SOC_POSSIBLE_DAIFMT_DSP_A:
case SND_SOC_POSSIBLE_DAIFMT_DSP_B:
case SND_SOC_POSSIBLE_DAIFMT_AC97:
case SND_SOC_POSSIBLE_DAIFMT_PDM:
dai_fmt = (dai_fmt & ~SND_SOC_DAIFMT_FORMAT_MASK) | i;
break;
/*
* for clock
*/
case SND_SOC_POSSIBLE_DAIFMT_CONT:
dai_fmt = (dai_fmt & ~SND_SOC_DAIFMT_CLOCK_MASK) | SND_SOC_DAIFMT_CONT;
break;
case SND_SOC_POSSIBLE_DAIFMT_GATED:
dai_fmt = (dai_fmt & ~SND_SOC_DAIFMT_CLOCK_MASK) | SND_SOC_DAIFMT_GATED;
break;
/*
* for clock invert
*/
case SND_SOC_POSSIBLE_DAIFMT_NB_NF:
dai_fmt = (dai_fmt & ~SND_SOC_DAIFMT_INV_MASK) | SND_SOC_DAIFMT_NB_NF;
break;
case SND_SOC_POSSIBLE_DAIFMT_NB_IF:
dai_fmt = (dai_fmt & ~SND_SOC_DAIFMT_INV_MASK) | SND_SOC_DAIFMT_NB_IF;
break;
case SND_SOC_POSSIBLE_DAIFMT_IB_NF:
dai_fmt = (dai_fmt & ~SND_SOC_DAIFMT_INV_MASK) | SND_SOC_DAIFMT_IB_NF;
break;
case SND_SOC_POSSIBLE_DAIFMT_IB_IF:
dai_fmt = (dai_fmt & ~SND_SOC_DAIFMT_INV_MASK) | SND_SOC_DAIFMT_IB_IF;
break;
/*
* for clock provider / consumer
*/
case SND_SOC_POSSIBLE_DAIFMT_CBP_CFP:
dai_fmt = (dai_fmt & ~SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) | SND_SOC_DAIFMT_CBP_CFP;
break;
case SND_SOC_POSSIBLE_DAIFMT_CBC_CFP:
dai_fmt = (dai_fmt & ~SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) | SND_SOC_DAIFMT_CBC_CFP;
break;
case SND_SOC_POSSIBLE_DAIFMT_CBP_CFC:
dai_fmt = (dai_fmt & ~SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) | SND_SOC_DAIFMT_CBP_CFC;
break;
case SND_SOC_POSSIBLE_DAIFMT_CBC_CFC:
dai_fmt = (dai_fmt & ~SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) | SND_SOC_DAIFMT_CBC_CFC;
break;
}
}
/*
* Some driver might have very complex limitation.
* In such case, user want to auto-select non-limitation part,
* and want to manually specify complex part.
*
* Or for example, if both CPU and Codec can be clock provider,
* but because of its quality, user want to specify it manually.
*
* Use manually specified settings if sound card did.
*/
if (!(dai_link->dai_fmt & SND_SOC_DAIFMT_FORMAT_MASK))
mask |= SND_SOC_DAIFMT_FORMAT_MASK;
if (!(dai_link->dai_fmt & SND_SOC_DAIFMT_CLOCK_MASK))
mask |= SND_SOC_DAIFMT_CLOCK_MASK;
if (!(dai_link->dai_fmt & SND_SOC_DAIFMT_INV_MASK))
mask |= SND_SOC_DAIFMT_INV_MASK;
if (!(dai_link->dai_fmt & SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK))
mask |= SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK;
dai_link->dai_fmt |= (dai_fmt & mask);
}
/**
* 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;
struct snd_soc_dai *codec_dai;
unsigned int i;
int ret;
if (!dai_fmt)
return 0;
for_each_rtd_codec_dais(rtd, i, codec_dai) {
ret = snd_soc_dai_set_fmt(codec_dai, dai_fmt);
if (ret != 0 && ret != -ENOTSUPP)
return ret;
}
/* Flip the polarity for the "CPU" end of link */
dai_fmt = snd_soc_daifmt_clock_provider_flipped(dai_fmt);
for_each_rtd_cpu_dais(rtd, i, cpu_dai) {
ret = snd_soc_dai_set_fmt(cpu_dai, dai_fmt);
if (ret != 0 && ret != -ENOTSUPP)
return ret;
}
return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_runtime_set_dai_fmt);
static int soc_init_pcm_runtime(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 = asoc_rtd_to_cpu(rtd, 0);
struct snd_soc_component *component;
int ret, num, i;
/* do machine specific initialization */
ret = snd_soc_link_init(rtd);
if (ret < 0)
return ret;
snd_soc_runtime_get_dai_fmt(rtd);
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, i, 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)
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;
}
return snd_soc_pcm_dai_new(rtd);
}
static void soc_set_name_prefix(struct snd_soc_card *card,
struct snd_soc_component *component)
{
struct device_node *of_node = soc_component_to_node(component);
const char *str;
int ret, i;
for (i = 0; i < card->num_configs; i++) {
struct snd_soc_codec_conf *map = &card->codec_conf[i];
if (snd_soc_is_matching_component(&map->dlc, component) &&
map->name_prefix) {
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
*/
ret = of_property_read_string(of_node, "sound-name-prefix", &str);
if (ret < 0)
return;
component->name_prefix = str;
}
static void soc_remove_component(struct snd_soc_component *component,
int probed)
{
if (!component->card)
return;
if (probed)
snd_soc_component_remove(component);
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 (snd_soc_component_is_dummy(component))
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)
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
* see
* snd_soc_component_set_aux()
*/
ret = snd_soc_component_init(component);
if (ret < 0)
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) {
if (card->disable_route_checks) {
dev_info(card->dev,
"%s: disable_route_checks set, ignoring errors on add_routes\n",
__func__);
} else {
dev_err(card->dev,
"%s: snd_soc_dapm_add_routes failed: %d\n",
__func__, ret);
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_link_dais(struct snd_soc_card *card)
{
struct snd_soc_pcm_runtime *rtd;
int order;
for_each_comp_order(order) {
for_each_card_rtds(card, rtd) {
/* remove all rtd connected DAIs in good order */
snd_soc_pcm_dai_remove(rtd, order);
}
}
}
static int soc_probe_link_dais(struct snd_soc_card *card)
{
struct snd_soc_pcm_runtime *rtd;
int 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);
/* probe all rtd connected DAIs in good order */
ret = snd_soc_pcm_dai_probe(rtd, 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;
int i, order;
for_each_comp_order(order) {
for_each_card_rtds(card, rtd) {
for_each_rtd_components(rtd, i, 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;
int i, ret, order;
for_each_comp_order(order) {
for_each_card_rtds(card, rtd) {
for_each_rtd_components(rtd, i, component) {
if (component->driver->probe_order != order)
continue;
ret = soc_probe_component(card, component);
if (ret < 0)
return ret;
}
}
}
return 0;
}
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) {
/* for snd_soc_component_init() */
snd_soc_component_set_aux(component, 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;
/* for snd_soc_component_init() */
snd_soc_component_set_aux(component, aux);
/* 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);
}
}
}
#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 */
};
/*
* 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, *board;
if (card->long_name)
return 0; /* long name already set by driver or from DMI */
if (!dmi_available)
return 0;
/* 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)) {
const char *product_version = dmi_get_system_info(DMI_PRODUCT_VERSION);
append_dmi_string(card, product);
/*
* some vendors like Lenovo may only put a self-explanatory
* name in the product version field
*/
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_dbg(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;
}
if (component->dev->of_node)
dai_link->platforms->of_node = component->dev->of_node;
else
dai_link->platforms->name = component->name;
/* convert non BE into BE */
if (!dai_link->no_pcm) {
dai_link->no_pcm = 1;
if (dai_link->dpcm_playback)
dev_warn(card->dev,
"invalid configuration, dailink %s has flags no_pcm=0 and dpcm_playback=1\n",
dai_link->name);
if (dai_link->dpcm_capture)
dev_warn(card->dev,
"invalid configuration, dailink %s has flags no_pcm=0 and dpcm_capture=1\n",
dai_link->name);
/* convert normal link into DPCM one */
if (!(dai_link->dpcm_playback ||
dai_link->dpcm_capture)) {
dai_link->dpcm_playback = !dai_link->capture_only;
dai_link->dpcm_capture = !dai_link->playback_only;
}
}
/*
* override any BE fixups
* see
* snd_soc_link_be_hw_params_fixup()
*/
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(card, name, name1, name2) \
__soc_setup_card_name(card, name, sizeof(name), name1, name2)
static void __soc_setup_card_name(struct snd_soc_card *card,
char *name, int len,
const char *name1, const char *name2)
{
const char *src = name1 ? name1 : name2;
int i;
snprintf(name, len, "%s", src);
if (name != card->snd_card->driver)
return;
/*
* Name normalization (driver field)
*
* 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;
}
}
/*
* The driver field should contain a valid string from the user view.
* The wrapping usually does not work so well here. Set a smaller string
* in the specific ASoC driver.
*/
if (strlen(src) > len - 1)
dev_err(card->dev, "ASoC: driver name too long '%s' -> '%s'\n", src, name);
}
static void soc_cleanup_card_resources(struct snd_soc_card *card)
{
struct snd_soc_pcm_runtime *rtd, *n;
if (card->snd_card)
snd_card_disconnect_sync(card->snd_card);
snd_soc_dapm_shutdown(card);
/* release machine specific resources */
for_each_card_rtds(card, rtd)
snd_soc_link_exit(rtd);
/* remove and free each DAI */
soc_remove_link_dais(card);
soc_remove_link_components(card);
for_each_card_rtds_safe(card, rtd, n)
snd_soc_remove_pcm_runtime(card, rtd);
/* 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 */
snd_soc_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 (snd_soc_card_is_instantiated(card)) {
card->instantiated = false;
snd_soc_flush_all_delayed_work(card);
soc_cleanup_card_resources(card);
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_component *component;
struct snd_soc_dai_link *dai_link;
int ret, i;
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_pcm_runtime(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 */
ret = snd_soc_card_probe(card);
if (ret < 0)
goto probe_end;
/* 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) {
ret = soc_init_pcm_runtime(card, rtd);
if (ret < 0)
goto probe_end;
}
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) {
if (card->disable_route_checks) {
dev_info(card->dev,
"%s: disable_route_checks set, ignoring errors on add_routes\n",
__func__);
} else {
dev_err(card->dev,
"%s: snd_soc_dapm_add_routes failed: %d\n",
__func__, ret);
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, card->snd_card->shortname,
card->name, NULL);
soc_setup_card_name(card, card->snd_card->longname,
card->long_name, card->name);
soc_setup_card_name(card, card->snd_card->driver,
card->driver_name, card->name);
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;
}
}
ret = snd_soc_card_late_probe(card);
if (ret < 0)
goto probe_end;
snd_soc_dapm_new_widgets(card);
snd_soc_card_fixup_controls(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_components(card, component)
if (!snd_soc_component_active(component))
pinctrl_pm_select_sleep_state(component->dev);
probe_end:
if (ret < 0)
soc_cleanup_card_resources(card);
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 devm_snd_soc_register_card(&pdev->dev, card);
}
int snd_soc_poweroff(struct device *dev)
{
struct snd_soc_card *card = dev_get_drvdata(dev);
struct snd_soc_component *component;
if (!snd_soc_card_is_instantiated(card))
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_components(card, component)
pinctrl_pm_select_sleep_state(component->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,
};
/**
* 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 i;
for (i = 0; i < num_controls; i++) {
const struct snd_kcontrol_new *control = &controls[i];
int 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;
}
/**
* 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->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);
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
*
*/
void 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);
}
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)
{
const char *devname = dev_name(dev);
char *found, *name;
unsigned int id1, id2;
if (devname == NULL)
return NULL;
name = devm_kstrdup(dev, devname, GFP_KERNEL);
if (!name)
return NULL;
/* 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';
}
/* I2C component devices are named "bus-addr" */
} else if (sscanf(name, "%x-%x", &id1, &id2) == 2) {
/* create unique ID number from I2C addr and bus */
*id = ((id1 & 0xffff) << 16) + id2;
devm_kfree(dev, name);
/* sanitize component name for DAI link creation */
name = devm_kasprintf(dev, GFP_KERNEL, "%s.%s", dev->driver->name, devname);
} else {
*id = 0;
}
return name;
}
/*
* 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
* @legacy_dai_naming: if %true, use legacy single-name format;
* if %false, use multiple-name format;
*
* 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;
/* 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;
}
EXPORT_SYMBOL_GPL(snd_soc_register_dai);
/**
* snd_soc_unregister_dais - 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->legacy_dai_naming);
if (dai == NULL) {
ret = -ENOMEM;
goto err;
}
}
return 0;
err:
snd_soc_unregister_dais(component);
return ret;
}
#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_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);
INIT_LIST_HEAD(&component->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;
#ifdef CONFIG_DEBUG_FS
if (!component->debugfs_prefix)
component->debugfs_prefix = driver->debugfs_prefix;
#endif
return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_component_initialize);
int snd_soc_add_component(struct snd_soc_component *component,
struct snd_soc_dai_driver *dai_drv,
int num_dai)
{
int ret;
int i;
mutex_lock(&client_mutex);
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(component->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);
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;
int ret;
component = devm_kzalloc(dev, sizeof(*component), GFP_KERNEL);
if (!component)
return -ENOMEM;
ret = snd_soc_component_initialize(component, component_driver, dev);
if (ret < 0)
return ret;
return snd_soc_add_component(component, dai_drv, num_dai);
}
EXPORT_SYMBOL_GPL(snd_soc_register_component);
/**
* snd_soc_unregister_component_by_driver - Unregister component using a given driver
* from the ASoC core
*
* @dev: The device to unregister
* @component_driver: The component driver to unregister
*/
void snd_soc_unregister_component_by_driver(struct device *dev,
const struct snd_soc_component_driver *component_driver)
{
struct snd_soc_component *component;
if (!component_driver)
return;
mutex_lock(&client_mutex);
component = snd_soc_lookup_component_nolocked(dev, component_driver->name);
if (!component)
goto out;
snd_soc_del_component_unlocked(component);
out:
mutex_unlock(&client_mutex);
}
EXPORT_SYMBOL_GPL(snd_soc_unregister_component_by_driver);
/**
* 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)
{
mutex_lock(&client_mutex);
while (1) {
struct snd_soc_component *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;
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) {
dev_err(card->dev, "ASoC: Property '%s's length is zero\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;
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++) {
int 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;
card->num_of_dapm_widgets = num_widgets;
return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_of_parse_audio_simple_widgets);
int snd_soc_of_parse_pin_switches(struct snd_soc_card *card, const char *prop)
{
const unsigned int nb_controls_max = 16;
const char **strings, *control_name;
struct snd_kcontrol_new *controls;
struct device *dev = card->dev;
unsigned int i, nb_controls;
int ret;
if (!of_property_read_bool(dev->of_node, prop))
return 0;
strings = devm_kcalloc(dev, nb_controls_max,
sizeof(*strings), GFP_KERNEL);
if (!strings)
return -ENOMEM;
ret = of_property_read_string_array(dev->of_node, prop,
strings, nb_controls_max);
if (ret < 0)
return ret;
nb_controls = (unsigned int)ret;
controls = devm_kcalloc(dev, nb_controls,
sizeof(*controls), GFP_KERNEL);
if (!controls)
return -ENOMEM;
for (i = 0; i < nb_controls; i++) {
control_name = devm_kasprintf(dev, GFP_KERNEL,
"%s Switch", strings[i]);
if (!control_name)
return -ENOMEM;
controls[i].iface = SNDRV_CTL_ELEM_IFACE_MIXER;
controls[i].name = control_name;
controls[i].info = snd_soc_dapm_info_pin_switch;
controls[i].get = snd_soc_dapm_get_pin_switch;
controls[i].put = snd_soc_dapm_put_pin_switch;
controls[i].private_value = (unsigned long)strings[i];
}
card->controls = controls;
card->num_controls = nb_controls;
return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_of_parse_pin_switches);
int snd_soc_of_get_slot_mask(struct device_node *np,
const char *prop_name,
unsigned int *mask)
{
u32 val;
const __be32 *of_slot_mask = of_get_property(np, prop_name, &val);
int i;
if (!of_slot_mask)
return 0;
val /= sizeof(u32);
for (i = 0; i < val; i++)
if (be32_to_cpup(&of_slot_mask[i]))
*mask |= (1 << i);
return val;
}
EXPORT_SYMBOL_GPL(snd_soc_of_get_slot_mask);
int snd_soc_of_parse_tdm_slot(struct device_node *np,
unsigned int *tx_mask,
unsigned int *rx_mask,
unsigned int *slots,
unsigned int *slot_width)
{
u32 val;
int ret;
if (tx_mask)
snd_soc_of_get_slot_mask(np, "dai-tdm-slot-tx-mask", tx_mask);
if (rx_mask)
snd_soc_of_get_slot_mask(np, "dai-tdm-slot-rx-mask", rx_mask);
if (of_property_read_bool(np, "dai-tdm-slot-num")) {
ret = of_property_read_u32(np, "dai-tdm-slot-num", &val);
if (ret)
return ret;
if (slots)
*slots = val;
}
if (of_property_read_bool(np, "dai-tdm-slot-width")) {
ret = of_property_read_u32(np, "dai-tdm-slot-width", &val);
if (ret)
return ret;
if (slot_width)
*slot_width = val;
}
return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_of_parse_tdm_slot);
void snd_soc_of_parse_node_prefix(struct device_node *np,
struct snd_soc_codec_conf *codec_conf,
struct device_node *of_node,
const char *propname)
{
const char *str;
int ret;
ret = of_property_read_string(np, propname, &str);
if (ret < 0) {
/* no prefix is not error */
return;
}
codec_conf->dlc.of_node = of_node;
codec_conf->name_prefix = str;
}
EXPORT_SYMBOL_GPL(snd_soc_of_parse_node_prefix);
int snd_soc_of_parse_audio_routing(struct snd_soc_card *card,
const char *propname)
{
struct device_node *np = card->dev->of_node;
int num_routes;
struct snd_soc_dapm_route *routes;
int i;
num_routes = of_property_count_strings(np, propname);
if (num_routes < 0 || num_routes & 1) {
dev_err(card->dev,
"ASoC: Property '%s' does not exist or its length is not even\n",
propname);
return -EINVAL;
}
num_routes /= 2;
routes = devm_kcalloc(card->dev, num_routes, sizeof(*routes),
GFP_KERNEL);
if (!routes) {
dev_err(card->dev,
"ASoC: Could not allocate DAPM route table\n");
return -ENOMEM;
}
for (i = 0; i < num_routes; i++) {
int ret = of_property_read_string_index(np, propname,
2 * i, &routes[i].sink);
if (ret) {
dev_err(card->dev,
"ASoC: Property '%s' index %d could not be read: %d\n",
propname, 2 * i, ret);
return -EINVAL;
}
ret = of_property_read_string_index(np, propname,
(2 * i) + 1, &routes[i].source);
if (ret) {
dev_err(card->dev,
"ASoC: Property '%s' index %d could not be read: %d\n",
propname, (2 * i) + 1, ret);
return -EINVAL;
}
}
card->num_of_dapm_routes = num_routes;
card->of_dapm_routes = routes;
return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_of_parse_audio_routing);
int snd_soc_of_parse_aux_devs(struct snd_soc_card *card, const char *propname)
{
struct device_node *node = card->dev->of_node;
struct snd_soc_aux_dev *aux;
int num, i;
num = of_count_phandle_with_args(node, propname, NULL);
if (num == -ENOENT) {
return 0;
} else if (num < 0) {
dev_err(card->dev, "ASOC: Property '%s' could not be read: %d\n",
propname, num);
return num;
}
aux = devm_kcalloc(card->dev, num, sizeof(*aux), GFP_KERNEL);
if (!aux)
return -ENOMEM;
card->aux_dev = aux;
card->num_aux_devs = num;
for_each_card_pre_auxs(card, i, aux) {
aux->dlc.of_node = of_parse_phandle(node, propname, i);
if (!aux->dlc.of_node)
return -EINVAL;
}
return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_of_parse_aux_devs);
unsigned int snd_soc_daifmt_clock_provider_flipped(unsigned int dai_fmt)
{
unsigned int inv_dai_fmt = dai_fmt & ~SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK;
switch (dai_fmt & SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) {
case SND_SOC_DAIFMT_CBP_CFP:
inv_dai_fmt |= SND_SOC_DAIFMT_CBC_CFC;
break;
case SND_SOC_DAIFMT_CBP_CFC:
inv_dai_fmt |= SND_SOC_DAIFMT_CBC_CFP;
break;
case SND_SOC_DAIFMT_CBC_CFP:
inv_dai_fmt |= SND_SOC_DAIFMT_CBP_CFC;
break;
case SND_SOC_DAIFMT_CBC_CFC:
inv_dai_fmt |= SND_SOC_DAIFMT_CBP_CFP;
break;
}
return inv_dai_fmt;
}
EXPORT_SYMBOL_GPL(snd_soc_daifmt_clock_provider_flipped);
unsigned int snd_soc_daifmt_clock_provider_from_bitmap(unsigned int bit_frame)
{
/*
* bit_frame is return value from
* snd_soc_daifmt_parse_clock_provider_raw()
*/
/* Codec base */
switch (bit_frame) {
case 0x11:
return SND_SOC_DAIFMT_CBP_CFP;
case 0x10:
return SND_SOC_DAIFMT_CBP_CFC;
case 0x01:
return SND_SOC_DAIFMT_CBC_CFP;
default:
return SND_SOC_DAIFMT_CBC_CFC;
}
return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_daifmt_clock_provider_from_bitmap);
unsigned int snd_soc_daifmt_parse_format(struct device_node *np,
const char *prefix)
{
int ret;
char prop[128];
unsigned int format = 0;
int bit, frame;
const char *str;
struct {
char *name;
unsigned int val;
} of_fmt_table[] = {
{ "i2s", SND_SOC_DAIFMT_I2S },
{ "right_j", SND_SOC_DAIFMT_RIGHT_J },
{ "left_j", SND_SOC_DAIFMT_LEFT_J },
{ "dsp_a", SND_SOC_DAIFMT_DSP_A },
{ "dsp_b", SND_SOC_DAIFMT_DSP_B },
{ "ac97", SND_SOC_DAIFMT_AC97 },
{ "pdm", SND_SOC_DAIFMT_PDM},
{ "msb", SND_SOC_DAIFMT_MSB },
{ "lsb", SND_SOC_DAIFMT_LSB },
};
if (!prefix)
prefix = "";
/*
* check "dai-format = xxx"
* or "[prefix]format = xxx"
* SND_SOC_DAIFMT_FORMAT_MASK area
*/
ret = of_property_read_string(np, "dai-format", &str);
if (ret < 0) {
snprintf(prop, sizeof(prop), "%sformat", prefix);
ret = of_property_read_string(np, prop, &str);
}
if (ret == 0) {
int i;
for (i = 0; i < ARRAY_SIZE(of_fmt_table); i++) {
if (strcmp(str, of_fmt_table[i].name) == 0) {
format |= of_fmt_table[i].val;
break;
}
}
}
/*
* check "[prefix]continuous-clock"
* SND_SOC_DAIFMT_CLOCK_MASK area
*/
snprintf(prop, sizeof(prop), "%scontinuous-clock", prefix);
if (of_property_read_bool(np, prop))
format |= SND_SOC_DAIFMT_CONT;
else
format |= SND_SOC_DAIFMT_GATED;
/*
* check "[prefix]bitclock-inversion"
* check "[prefix]frame-inversion"
* SND_SOC_DAIFMT_INV_MASK area
*/
snprintf(prop, sizeof(prop), "%sbitclock-inversion", prefix);
bit = !!of_get_property(np, prop, NULL);
snprintf(prop, sizeof(prop), "%sframe-inversion", prefix);
frame = !!of_get_property(np, prop, NULL);
switch ((bit << 4) + frame) {
case 0x11:
format |= SND_SOC_DAIFMT_IB_IF;
break;
case 0x10:
format |= SND_SOC_DAIFMT_IB_NF;
break;
case 0x01:
format |= SND_SOC_DAIFMT_NB_IF;
break;
default:
/* SND_SOC_DAIFMT_NB_NF is default */
break;
}
return format;
}
EXPORT_SYMBOL_GPL(snd_soc_daifmt_parse_format);
unsigned int snd_soc_daifmt_parse_clock_provider_raw(struct device_node *np,
const char *prefix,
struct device_node **bitclkmaster,
struct device_node **framemaster)
{
char prop[128];
unsigned int bit, frame;
if (!prefix)
prefix = "";
/*
* check "[prefix]bitclock-master"
* check "[prefix]frame-master"
*/
snprintf(prop, sizeof(prop), "%sbitclock-master", prefix);
bit = !!of_get_property(np, prop, NULL);
if (bit && bitclkmaster)
*bitclkmaster = of_parse_phandle(np, prop, 0);
snprintf(prop, sizeof(prop), "%sframe-master", prefix);
frame = !!of_get_property(np, prop, NULL);
if (frame && framemaster)
*framemaster = of_parse_phandle(np, prop, 0);
/*
* return bitmap.
* It will be parameter of
* snd_soc_daifmt_clock_provider_from_bitmap()
*/
return (bit << 4) + frame;
}
EXPORT_SYMBOL_GPL(snd_soc_daifmt_parse_clock_provider_raw);
int snd_soc_get_dai_id(struct device_node *ep)
{
struct snd_soc_component *component;
struct snd_soc_dai_link_component dlc;
int ret;
dlc.of_node = of_graph_get_port_parent(ep);
dlc.name = NULL;
/*
* For example HDMI case, HDMI has video/sound port,
* but ALSA SoC needs sound port number only.
* Thus counting HDMI DT port/endpoint doesn't work.
* Then, it should have .of_xlate_dai_id
*/
ret = -ENOTSUPP;
mutex_lock(&client_mutex);
component = soc_find_component(&dlc);
if (component)
ret = snd_soc_component_of_xlate_dai_id(component, ep);
mutex_unlock(&client_mutex);
of_node_put(dlc.of_node);
return ret;
}
EXPORT_SYMBOL_GPL(snd_soc_get_dai_id);
int snd_soc_get_dai_name(const struct of_phandle_args *args,
const char **dai_name)
{
struct snd_soc_component *pos;
int ret = -EPROBE_DEFER;
mutex_lock(&client_mutex);
for_each_component(pos) {
struct device_node *component_of_node = soc_component_to_node(pos);
if (component_of_node != args->np || !pos->num_dai)
continue;
ret = snd_soc_component_of_xlate_dai_name(pos, args, dai_name);
if (ret == -ENOTSUPP) {
struct snd_soc_dai *dai;
int id = -1;
switch (args->args_count) {
case 0:
id = 0; /* same as dai_drv[0] */
break;
case 1:
id = args->args[0];
break;
default:
/* not supported */
break;
}
if (id < 0 || id >= pos->num_dai) {
ret = -EINVAL;
continue;
}
ret = 0;
/* find target DAI */
for_each_component_dais(pos, dai) {
if (id == 0)
break;
id--;
}
*dai_name = dai->driver->name;
if (!*dai_name)
*dai_name = pos->name;
} else if (ret) {
/*
* if another error than ENOTSUPP is returned go on and
* check if another component is provided with the same
* node. This may happen if a device provides several
* components
*/
continue;
}
break;
}
mutex_unlock(&client_mutex);
return ret;
}
EXPORT_SYMBOL_GPL(snd_soc_get_dai_name);
int snd_soc_of_get_dai_name(struct device_node *of_node,
const char **dai_name)
{
struct of_phandle_args args;
int ret;
ret = of_parse_phandle_with_args(of_node, "sound-dai",
"#sound-dai-cells", 0, &args);
if (ret)
return ret;
ret = snd_soc_get_dai_name(&args, dai_name);
of_node_put(args.np);
return ret;
}
EXPORT_SYMBOL_GPL(snd_soc_of_get_dai_name);
static void __snd_soc_of_put_component(struct snd_soc_dai_link_component *component)
{
if (component->of_node) {
of_node_put(component->of_node);
component->of_node = NULL;
}
}
static int __snd_soc_of_get_dai_link_component_alloc(
struct device *dev, struct device_node *of_node,
struct snd_soc_dai_link_component **ret_component,
int *ret_num)
{
struct snd_soc_dai_link_component *component;
int num;
/* Count the number of CPUs/CODECs */
num = of_count_phandle_with_args(of_node, "sound-dai", "#sound-dai-cells");
if (num <= 0) {
if (num == -ENOENT)
dev_err(dev, "No 'sound-dai' property\n");
else
dev_err(dev, "Bad phandle in 'sound-dai'\n");
return num;
}
component = devm_kcalloc(dev, num, sizeof(*component), GFP_KERNEL);
if (!component)
return -ENOMEM;
*ret_component = component;
*ret_num = num;
return 0;
}
static int __snd_soc_of_get_dai_link_component_parse(
struct device_node *of_node,
struct snd_soc_dai_link_component *component, int index)
{
struct of_phandle_args args;
int ret;
ret = of_parse_phandle_with_args(of_node, "sound-dai", "#sound-dai-cells",
index, &args);
if (ret)
return ret;
ret = snd_soc_get_dai_name(&args, &component->dai_name);
if (ret < 0)
return ret;
component->of_node = args.np;
return 0;
}
/*
* snd_soc_of_put_dai_link_codecs - Dereference device nodes in the codecs array
* @dai_link: DAI link
*
* Dereference device nodes acquired by snd_soc_of_get_dai_link_codecs().
*/
void snd_soc_of_put_dai_link_codecs(struct snd_soc_dai_link *dai_link)
{
struct snd_soc_dai_link_component *component;
int index;
for_each_link_codecs(dai_link, index, component)
__snd_soc_of_put_component(component);
}
EXPORT_SYMBOL_GPL(snd_soc_of_put_dai_link_codecs);
/*
* snd_soc_of_get_dai_link_codecs - Parse a list of CODECs in the devicetree
* @dev: Card device
* @of_node: Device node
* @dai_link: DAI link
*
* Builds an array of CODEC DAI components from the DAI link property
* 'sound-dai'.
* The array is set in the DAI link and the number of DAIs is set accordingly.
* The device nodes in the array (of_node) must be dereferenced by calling
* snd_soc_of_put_dai_link_codecs() on @dai_link.
*
* Returns 0 for success
*/
int snd_soc_of_get_dai_link_codecs(struct device *dev,
struct device_node *of_node,
struct snd_soc_dai_link *dai_link)
{
struct snd_soc_dai_link_component *component;
int index, ret;
ret = __snd_soc_of_get_dai_link_component_alloc(dev, of_node,
&dai_link->codecs, &dai_link->num_codecs);
if (ret < 0)
return ret;
/* Parse the list */
for_each_link_codecs(dai_link, index, component) {
ret = __snd_soc_of_get_dai_link_component_parse(of_node, component, index);
if (ret)
goto err;
}
return 0;
err:
snd_soc_of_put_dai_link_codecs(dai_link);
dai_link->codecs = NULL;
dai_link->num_codecs = 0;
return ret;
}
EXPORT_SYMBOL_GPL(snd_soc_of_get_dai_link_codecs);
/*
* snd_soc_of_put_dai_link_cpus - Dereference device nodes in the codecs array
* @dai_link: DAI link
*
* Dereference device nodes acquired by snd_soc_of_get_dai_link_cpus().
*/
void snd_soc_of_put_dai_link_cpus(struct snd_soc_dai_link *dai_link)
{
struct snd_soc_dai_link_component *component;
int index;
for_each_link_cpus(dai_link, index, component)
__snd_soc_of_put_component(component);
}
EXPORT_SYMBOL_GPL(snd_soc_of_put_dai_link_cpus);
/*
* snd_soc_of_get_dai_link_cpus - Parse a list of CPU DAIs in the devicetree
* @dev: Card device
* @of_node: Device node
* @dai_link: DAI link
*
* Is analogous to snd_soc_of_get_dai_link_codecs but parses a list of CPU DAIs
* instead.
*
* Returns 0 for success
*/
int snd_soc_of_get_dai_link_cpus(struct device *dev,
struct device_node *of_node,
struct snd_soc_dai_link *dai_link)
{
struct snd_soc_dai_link_component *component;
int index, ret;
/* Count the number of CPUs */
ret = __snd_soc_of_get_dai_link_component_alloc(dev, of_node,
&dai_link->cpus, &dai_link->num_cpus);
if (ret < 0)
return ret;
/* Parse the list */
for_each_link_cpus(dai_link, index, component) {
ret = __snd_soc_of_get_dai_link_component_parse(of_node, component, index);
if (ret)
goto err;
}
return 0;
err:
snd_soc_of_put_dai_link_cpus(dai_link);
dai_link->cpus = NULL;
dai_link->num_cpus = 0;
return ret;
}
EXPORT_SYMBOL_GPL(snd_soc_of_get_dai_link_cpus);
static int __init snd_soc_init(void)
{
int ret;
snd_soc_debugfs_init();
ret = snd_soc_util_init();
if (ret)
goto err_util_init;
ret = platform_driver_register(&soc_driver);
if (ret)
goto err_register;
return 0;
err_register:
snd_soc_util_exit();
err_util_init:
snd_soc_debugfs_exit();
return ret;
}
module_init(snd_soc_init);
static void __exit snd_soc_exit(void)
{
snd_soc_util_exit();
snd_soc_debugfs_exit();
platform_driver_unregister(&soc_driver);
}
module_exit(snd_soc_exit);
/* Module information */
MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
MODULE_DESCRIPTION("ALSA SoC Core");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:soc-audio");