diff options
Diffstat (limited to '')
| -rw-r--r-- | sound/soc/soc-core.c | 3214 |
1 files changed, 3214 insertions, 0 deletions
diff --git a/sound/soc/soc-core.c b/sound/soc/soc-core.c new file mode 100644 index 000000000..e9da95ebc --- /dev/null +++ b/sound/soc/soc-core.c @@ -0,0 +1,3214 @@ +// 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/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/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 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 +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() + */ + 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) + goto free_rtd; + + 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->num_cpus = dai_link->num_cpus; + rtd->num_codecs = dai_link->num_codecs; + rtd->card = card; + rtd->dai_link = dai_link; + rtd->num = card->num_rtd++; + + /* 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 +/* 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 playback = SNDRV_PCM_STREAM_PLAYBACK; + 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_dais(rtd, i, dai) { + if (snd_soc_dai_stream_active(dai, playback)) + snd_soc_dai_digital_mute(dai, 1, playback); + } + } + + /* 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); + + for_each_card_rtds(card, rtd) { + int stream; + + if (rtd->dai_link->ignore_suspend) + continue; + + for_each_pcm_streams(stream) + snd_soc_dapm_stream_event(rtd, stream, + 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_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); + + snd_soc_card_resume_pre(card); + + for_each_card_components(card, component) { + if (snd_soc_component_is_suspended(component)) + snd_soc_component_resume(component); + } + + for_each_card_rtds(card, rtd) { + int stream; + + if (rtd->dai_link->ignore_suspend) + continue; + + for_each_pcm_streams(stream) + snd_soc_dapm_stream_event(rtd, stream, + SND_SOC_DAPM_STREAM_RESUME); + } + + /* unmute any active DACs */ + for_each_card_rtds(card, rtd) { + struct snd_soc_dai *dai; + int playback = SNDRV_PCM_STREAM_PLAYBACK; + + 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, 0, playback); + } + } + + 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 (!card->instantiated) + 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); + + /* release machine specific resources */ + snd_soc_link_exit(rtd); + + /* + * 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 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; + + /* set default power off timeout */ + rtd->pmdown_time = pmdown_time; + + /* do machine specific initialization */ + ret = snd_soc_link_init(rtd); + if (ret < 0) + 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, 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) { + 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; + } + + 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)) { + 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); + + /* 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 + * 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); + } + } +} + +/** + * 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 inv_dai_fmt; + unsigned int i; + int ret; + + for_each_rtd_codec_dais(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 + */ + 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; + } + for_each_rtd_cpu_dais(rtd, i, cpu_dai) { + unsigned int fmt = dai_fmt; + + if (cpu_dai->component->driver->non_legacy_dai_naming) + fmt = inv_dai_fmt; + + ret = snd_soc_dai_set_fmt(cpu_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 +/* + * 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, *product_version, *board; + + if (card->long_name) + return 0; /* long name already set by driver or from DMI */ + + if (!is_acpi_device_node(card->dev->fwnode)) + 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)) { + 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_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; + } + 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(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) +{ + struct snd_soc_pcm_runtime *rtd, *n; + + 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_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 (card->instantiated) { + 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->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; + } + } + + ret = snd_soc_card_late_probe(card); + if (ret < 0) + goto probe_end; + + 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_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 (!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_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 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; +} + +/** + * 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); + 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) +{ + const char *devname = dev_name(dev); + char *found, *name; + 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; +} + +/** + * 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->non_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; + + 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) +{ + 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; + card->num_of_dapm_widgets = num_widgets; + + return 0; +} +EXPORT_SYMBOL_GPL(snd_soc_of_parse_audio_simple_widgets); + +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, ret; + + 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; + if (!num_routes) { + dev_err(card->dev, "ASoC: Property '%s's length is zero\n", + propname); + return -EINVAL; + } + + 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++) { + 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_of_parse_daifmt(struct device_node *np, + const char *prefix, + struct device_node **bitclkmaster, + struct device_node **framemaster) +{ + int ret, i; + 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) { + 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; + } + + /* + * check "[prefix]bitclock-master" + * check "[prefix]frame-master" + * SND_SOC_DAIFMT_MASTER_MASK area + */ + 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); + + switch ((bit << 4) + frame) { + case 0x11: + format |= SND_SOC_DAIFMT_CBM_CFM; + break; + case 0x10: + format |= SND_SOC_DAIFMT_CBM_CFS; + break; + case 0x01: + format |= SND_SOC_DAIFMT_CBS_CFM; + break; + default: + format |= SND_SOC_DAIFMT_CBS_CFS; + break; + } + + return format; +} +EXPORT_SYMBOL_GPL(snd_soc_of_parse_daifmt); + +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(struct of_phandle_args *args, + const char **dai_name) +{ + struct snd_soc_component *pos; + struct device_node *component_of_node; + int ret = -EPROBE_DEFER; + + mutex_lock(&client_mutex); + for_each_component(pos) { + 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); + +/* + * 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) { + if (!component->of_node) + break; + of_node_put(component->of_node); + component->of_node = NULL; + } +} +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 of_phandle_args args; + struct snd_soc_dai_link_component *component; + char *name; + int index, num_codecs, ret; + + /* Count the number of CODECs */ + name = "sound-dai"; + num_codecs = of_count_phandle_with_args(of_node, name, + "#sound-dai-cells"); + if (num_codecs <= 0) { + if (num_codecs == -ENOENT) + dev_err(dev, "No 'sound-dai' property\n"); + else + dev_err(dev, "Bad phandle in 'sound-dai'\n"); + return num_codecs; + } + component = devm_kcalloc(dev, + num_codecs, sizeof(*component), + GFP_KERNEL); + if (!component) + return -ENOMEM; + dai_link->codecs = component; + dai_link->num_codecs = num_codecs; + + /* Parse the list */ + for_each_link_codecs(dai_link, index, component) { + ret = of_parse_phandle_with_args(of_node, name, + "#sound-dai-cells", + index, &args); + if (ret) + goto err; + component->of_node = args.np; + ret = snd_soc_get_dai_name(&args, &component->dai_name); + if (ret < 0) + 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); + +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"); |