diff options
Diffstat (limited to '')
| -rw-r--r-- | sound/soc/soc-core.c | 3886 |
1 files changed, 3886 insertions, 0 deletions
diff --git a/sound/soc/soc-core.c b/sound/soc/soc-core.c new file mode 100644 index 000000000..9ca7dff55 --- /dev/null +++ b/sound/soc/soc-core.c @@ -0,0 +1,3886 @@ +// SPDX-License-Identifier: GPL-2.0+ +// +// soc-core.c -- ALSA SoC Audio Layer +// +// Copyright 2005 Wolfson Microelectronics PLC. +// Copyright 2005 Openedhand Ltd. +// Copyright (C) 2010 Slimlogic Ltd. +// Copyright (C) 2010 Texas Instruments Inc. +// +// Author: Liam Girdwood <lrg@slimlogic.co.uk> +// with code, comments and ideas from :- +// Richard Purdie <richard@openedhand.com> +// +// TODO: +// o Add hw rules to enforce rates, etc. +// o More testing with other codecs/machines. +// o Add more codecs and platforms to ensure good API coverage. +// o Support TDM on PCM and I2S + +#include <linux/module.h> +#include <linux/moduleparam.h> +#include <linux/init.h> +#include <linux/delay.h> +#include <linux/pm.h> +#include <linux/bitops.h> +#include <linux/debugfs.h> +#include <linux/platform_device.h> +#include <linux/pinctrl/consumer.h> +#include <linux/ctype.h> +#include <linux/slab.h> +#include <linux/of.h> +#include <linux/of_graph.h> +#include <linux/dmi.h> +#include <sound/core.h> +#include <sound/jack.h> +#include <sound/pcm.h> +#include <sound/pcm_params.h> +#include <sound/soc.h> +#include <sound/soc-dpcm.h> +#include <sound/soc-topology.h> +#include <sound/initval.h> + +#define CREATE_TRACE_POINTS +#include <trace/events/asoc.h> + +#define NAME_SIZE 32 + +#ifdef CONFIG_DEBUG_FS +struct dentry *snd_soc_debugfs_root; +EXPORT_SYMBOL_GPL(snd_soc_debugfs_root); +#endif + +static DEFINE_MUTEX(client_mutex); +static LIST_HEAD(component_list); + +/* + * 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)"); + +/* 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 */ +}; + +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 (attr == &dev_attr_pmdown_time.attr) + return attr->mode; /* always visible */ + return rtd->num_codecs ? attr->mode : 0; /* enabled only with codec */ +} + +static const struct attribute_group soc_dapm_dev_group = { + .attrs = soc_dapm_dev_attrs, + .is_visible = soc_dev_attr_is_visible, +}; + +static const struct attribute_group soc_dev_group = { + .attrs = soc_dev_attrs, + .is_visible = soc_dev_attr_is_visible, +}; + +static const struct attribute_group *soc_dev_attr_groups[] = { + &soc_dapm_dev_group, + &soc_dev_group, + NULL +}; + +#ifdef CONFIG_DEBUG_FS +static void soc_init_component_debugfs(struct snd_soc_component *component) +{ + if (!component->card->debugfs_card_root) + return; + + if (component->debugfs_prefix) { + char *name; + + name = kasprintf(GFP_KERNEL, "%s:%s", + component->debugfs_prefix, component->name); + if (name) { + component->debugfs_root = debugfs_create_dir(name, + component->card->debugfs_card_root); + kfree(name); + } + } else { + component->debugfs_root = debugfs_create_dir(component->name, + component->card->debugfs_card_root); + } + + if (!component->debugfs_root) { + dev_warn(component->dev, + "ASoC: Failed to create component debugfs directory\n"); + return; + } + + 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) +{ + debugfs_remove_recursive(component->debugfs_root); +} + +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); + + list_for_each_entry(component, &component_list, list) + list_for_each_entry(dai, &component->dai_list, list) + 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); + + list_for_each_entry(component, &component_list, list) + 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) +{ + if (!snd_soc_debugfs_root) + return; + + card->debugfs_card_root = debugfs_create_dir(card->name, + snd_soc_debugfs_root); + if (!card->debugfs_card_root) { + dev_warn(card->dev, + "ASoC: Failed to create card debugfs directory\n"); + return; + } + + card->debugfs_pop_time = debugfs_create_u32("dapm_pop_time", 0644, + card->debugfs_card_root, + &card->pop_time); + if (!card->debugfs_pop_time) + dev_warn(card->dev, + "ASoC: Failed to create pop time debugfs file\n"); +} + +static void soc_cleanup_card_debugfs(struct snd_soc_card *card) +{ + debugfs_remove_recursive(card->debugfs_card_root); +} + +static void snd_soc_debugfs_init(void) +{ + snd_soc_debugfs_root = debugfs_create_dir("asoc", NULL); + if (IS_ERR_OR_NULL(snd_soc_debugfs_root)) { + pr_warn("ASoC: Failed to create debugfs directory\n"); + snd_soc_debugfs_root = NULL; + return; + } + + if (!debugfs_create_file("dais", 0444, snd_soc_debugfs_root, NULL, + &dai_list_fops)) + pr_warn("ASoC: Failed to create DAI list debugfs file\n"); + + if (!debugfs_create_file("components", 0444, snd_soc_debugfs_root, NULL, + &component_list_fops)) + pr_warn("ASoC: Failed to create component list debugfs file\n"); +} + +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_rtdcom_add(struct snd_soc_pcm_runtime *rtd, + struct snd_soc_component *component) +{ + struct snd_soc_rtdcom_list *rtdcom; + struct snd_soc_rtdcom_list *new_rtdcom; + + for_each_rtdcom(rtd, rtdcom) { + /* already connected */ + if (rtdcom->component == component) + return 0; + } + + new_rtdcom = kmalloc(sizeof(*new_rtdcom), GFP_KERNEL); + if (!new_rtdcom) + return -ENOMEM; + + new_rtdcom->component = component; + INIT_LIST_HEAD(&new_rtdcom->list); + + list_add_tail(&new_rtdcom->list, &rtd->component_list); + + return 0; +} + +static void snd_soc_rtdcom_del_all(struct snd_soc_pcm_runtime *rtd) +{ + struct snd_soc_rtdcom_list *rtdcom1, *rtdcom2; + + for_each_rtdcom_safe(rtd, rtdcom1, rtdcom2) + kfree(rtdcom1); + + INIT_LIST_HEAD(&rtd->component_list); +} + +struct snd_soc_component *snd_soc_rtdcom_lookup(struct snd_soc_pcm_runtime *rtd, + const char *driver_name) +{ + struct snd_soc_rtdcom_list *rtdcom; + + if (!driver_name) + return NULL; + + for_each_rtdcom(rtd, rtdcom) { + const char *component_name = rtdcom->component->driver->name; + + if (!component_name) + continue; + + if ((component_name == driver_name) || + strcmp(component_name, driver_name) == 0) + return rtdcom->component; + } + + return NULL; +} +EXPORT_SYMBOL_GPL(snd_soc_rtdcom_lookup); + +struct snd_pcm_substream *snd_soc_get_dai_substream(struct snd_soc_card *card, + const char *dai_link, int stream) +{ + struct snd_soc_pcm_runtime *rtd; + + list_for_each_entry(rtd, &card->rtd_list, list) { + if (rtd->dai_link->no_pcm && + !strcmp(rtd->dai_link->name, dai_link)) + return rtd->pcm->streams[stream].substream; + } + dev_dbg(card->dev, "ASoC: failed to find dai link %s\n", dai_link); + return NULL; +} +EXPORT_SYMBOL_GPL(snd_soc_get_dai_substream); + +static const struct snd_soc_ops null_snd_soc_ops; + +static 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; + + rtd = kzalloc(sizeof(struct snd_soc_pcm_runtime), GFP_KERNEL); + if (!rtd) + return NULL; + + INIT_LIST_HEAD(&rtd->component_list); + rtd->card = card; + rtd->dai_link = dai_link; + if (!rtd->dai_link->ops) + rtd->dai_link->ops = &null_snd_soc_ops; + + rtd->codec_dais = kcalloc(dai_link->num_codecs, + sizeof(struct snd_soc_dai *), + GFP_KERNEL); + if (!rtd->codec_dais) { + kfree(rtd); + return NULL; + } + + return rtd; +} + +static void soc_free_pcm_runtime(struct snd_soc_pcm_runtime *rtd) +{ + kfree(rtd->codec_dais); + snd_soc_rtdcom_del_all(rtd); + kfree(rtd); +} + +static void soc_add_pcm_runtime(struct snd_soc_card *card, + struct snd_soc_pcm_runtime *rtd) +{ + list_add_tail(&rtd->list, &card->rtd_list); + rtd->num = card->num_rtd; + card->num_rtd++; +} + +static void soc_remove_pcm_runtimes(struct snd_soc_card *card) +{ + struct snd_soc_pcm_runtime *rtd, *_rtd; + + list_for_each_entry_safe(rtd, _rtd, &card->rtd_list, list) { + list_del(&rtd->list); + soc_free_pcm_runtime(rtd); + } + + card->num_rtd = 0; +} + +struct snd_soc_pcm_runtime *snd_soc_get_pcm_runtime(struct snd_soc_card *card, + const char *dai_link) +{ + struct snd_soc_pcm_runtime *rtd; + + list_for_each_entry(rtd, &card->rtd_list, list) { + if (!strcmp(rtd->dai_link->name, dai_link)) + return rtd; + } + dev_dbg(card->dev, "ASoC: failed to find rtd %s\n", dai_link); + return NULL; +} +EXPORT_SYMBOL_GPL(snd_soc_get_pcm_runtime); + +static void codec2codec_close_delayed_work(struct work_struct *work) +{ + /* Currently nothing to do for c2c links + * Since c2c links are internal nodes in the DAPM graph and + * don't interface with the outside world or application layer + * we don't have to do any special handling on close. + */ +} + +#ifdef CONFIG_PM_SLEEP +/* powers down audio subsystem for suspend */ +int snd_soc_suspend(struct device *dev) +{ + struct snd_soc_card *card = dev_get_drvdata(dev); + struct snd_soc_component *component; + struct snd_soc_pcm_runtime *rtd; + int i; + + /* If the card is not initialized yet there is nothing to do */ + if (!card->instantiated) + return 0; + + /* Due to the resume being scheduled into a workqueue we could + * suspend before that's finished - wait for it to complete. + */ + snd_power_wait(card->snd_card, SNDRV_CTL_POWER_D0); + + /* we're going to block userspace touching us until resume completes */ + snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D3hot); + + /* mute any active DACs */ + list_for_each_entry(rtd, &card->rtd_list, list) { + + if (rtd->dai_link->ignore_suspend) + continue; + + for (i = 0; i < rtd->num_codecs; i++) { + struct snd_soc_dai *dai = rtd->codec_dais[i]; + struct snd_soc_dai_driver *drv = dai->driver; + + if (drv->ops->digital_mute && dai->playback_active) + drv->ops->digital_mute(dai, 1); + } + } + + /* suspend all pcms */ + list_for_each_entry(rtd, &card->rtd_list, list) { + if (rtd->dai_link->ignore_suspend) + continue; + + snd_pcm_suspend_all(rtd->pcm); + } + + if (card->suspend_pre) + card->suspend_pre(card); + + list_for_each_entry(rtd, &card->rtd_list, list) { + struct snd_soc_dai *cpu_dai = rtd->cpu_dai; + + if (rtd->dai_link->ignore_suspend) + continue; + + if (cpu_dai->driver->suspend && !cpu_dai->driver->bus_control) + cpu_dai->driver->suspend(cpu_dai); + } + + /* close any waiting streams */ + list_for_each_entry(rtd, &card->rtd_list, list) + flush_delayed_work(&rtd->delayed_work); + + list_for_each_entry(rtd, &card->rtd_list, list) { + + if (rtd->dai_link->ignore_suspend) + continue; + + snd_soc_dapm_stream_event(rtd, + SNDRV_PCM_STREAM_PLAYBACK, + SND_SOC_DAPM_STREAM_SUSPEND); + + snd_soc_dapm_stream_event(rtd, + SNDRV_PCM_STREAM_CAPTURE, + SND_SOC_DAPM_STREAM_SUSPEND); + } + + /* Recheck all endpoints too, their state is affected by suspend */ + dapm_mark_endpoints_dirty(card); + snd_soc_dapm_sync(&card->dapm); + + /* suspend all COMPONENTs */ + list_for_each_entry(component, &card->component_dev_list, card_list) { + struct snd_soc_dapm_context *dapm = snd_soc_component_get_dapm(component); + + /* If there are paths active then the COMPONENT will be held with + * bias _ON and should not be suspended. */ + if (!component->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; + } + /* fall through */ + + case SND_SOC_BIAS_OFF: + if (component->driver->suspend) + component->driver->suspend(component); + component->suspended = 1; + 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; + } + } + } + + list_for_each_entry(rtd, &card->rtd_list, list) { + struct snd_soc_dai *cpu_dai = rtd->cpu_dai; + + if (rtd->dai_link->ignore_suspend) + continue; + + if (cpu_dai->driver->suspend && cpu_dai->driver->bus_control) + cpu_dai->driver->suspend(cpu_dai); + + /* deactivate pins to sleep state */ + pinctrl_pm_select_sleep_state(cpu_dai->dev); + } + + if (card->suspend_post) + card->suspend_post(card); + + return 0; +} +EXPORT_SYMBOL_GPL(snd_soc_suspend); + +/* deferred resume work, so resume can complete before we finished + * setting our codec back up, which can be very slow on I2C + */ +static void soc_resume_deferred(struct work_struct *work) +{ + struct snd_soc_card *card = + container_of(work, struct snd_soc_card, deferred_resume_work); + struct snd_soc_pcm_runtime *rtd; + struct snd_soc_component *component; + int i; + + /* our power state is still SNDRV_CTL_POWER_D3hot from suspend time, + * so userspace apps are blocked from touching us + */ + + dev_dbg(card->dev, "ASoC: starting resume work\n"); + + /* Bring us up into D2 so that DAPM starts enabling things */ + snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D2); + + if (card->resume_pre) + card->resume_pre(card); + + /* resume control bus DAIs */ + list_for_each_entry(rtd, &card->rtd_list, list) { + struct snd_soc_dai *cpu_dai = rtd->cpu_dai; + + if (rtd->dai_link->ignore_suspend) + continue; + + if (cpu_dai->driver->resume && cpu_dai->driver->bus_control) + cpu_dai->driver->resume(cpu_dai); + } + + list_for_each_entry(component, &card->component_dev_list, card_list) { + if (component->suspended) { + if (component->driver->resume) + component->driver->resume(component); + component->suspended = 0; + } + } + + list_for_each_entry(rtd, &card->rtd_list, list) { + + if (rtd->dai_link->ignore_suspend) + continue; + + snd_soc_dapm_stream_event(rtd, + SNDRV_PCM_STREAM_PLAYBACK, + SND_SOC_DAPM_STREAM_RESUME); + + snd_soc_dapm_stream_event(rtd, + SNDRV_PCM_STREAM_CAPTURE, + SND_SOC_DAPM_STREAM_RESUME); + } + + /* unmute any active DACs */ + list_for_each_entry(rtd, &card->rtd_list, list) { + + if (rtd->dai_link->ignore_suspend) + continue; + + for (i = 0; i < rtd->num_codecs; i++) { + struct snd_soc_dai *dai = rtd->codec_dais[i]; + struct snd_soc_dai_driver *drv = dai->driver; + + if (drv->ops->digital_mute && dai->playback_active) + drv->ops->digital_mute(dai, 0); + } + } + + list_for_each_entry(rtd, &card->rtd_list, list) { + struct snd_soc_dai *cpu_dai = rtd->cpu_dai; + + if (rtd->dai_link->ignore_suspend) + continue; + + if (cpu_dai->driver->resume && !cpu_dai->driver->bus_control) + cpu_dai->driver->resume(cpu_dai); + } + + if (card->resume_post) + card->resume_post(card); + + dev_dbg(card->dev, "ASoC: resume work completed\n"); + + /* Recheck all endpoints too, their state is affected by suspend */ + dapm_mark_endpoints_dirty(card); + snd_soc_dapm_sync(&card->dapm); + + /* userspace can access us now we are back as we were before */ + snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D0); +} + +/* powers up audio subsystem after a suspend */ +int snd_soc_resume(struct device *dev) +{ + struct snd_soc_card *card = dev_get_drvdata(dev); + bool bus_control = false; + struct snd_soc_pcm_runtime *rtd; + + /* If the card is not initialized yet there is nothing to do */ + if (!card->instantiated) + return 0; + + /* activate pins from sleep state */ + list_for_each_entry(rtd, &card->rtd_list, list) { + struct snd_soc_dai **codec_dais = rtd->codec_dais; + struct snd_soc_dai *cpu_dai = rtd->cpu_dai; + int j; + + if (cpu_dai->active) + pinctrl_pm_select_default_state(cpu_dai->dev); + + for (j = 0; j < rtd->num_codecs; j++) { + struct snd_soc_dai *codec_dai = codec_dais[j]; + if (codec_dai->active) + pinctrl_pm_select_default_state(codec_dai->dev); + } + } + + /* + * DAIs that also act as the control bus master might have other drivers + * hanging off them so need to resume immediately. Other drivers don't + * have that problem and may take a substantial amount of time to resume + * due to I/O costs and anti-pop so handle them out of line. + */ + list_for_each_entry(rtd, &card->rtd_list, list) { + struct snd_soc_dai *cpu_dai = rtd->cpu_dai; + bus_control |= cpu_dai->driver->bus_control; + } + if (bus_control) { + dev_dbg(dev, "ASoC: Resuming control bus master immediately\n"); + soc_resume_deferred(&card->deferred_resume_work); + } else { + dev_dbg(dev, "ASoC: Scheduling resume work\n"); + if (!schedule_work(&card->deferred_resume_work)) + dev_err(dev, "ASoC: resume work item may be lost\n"); + } + + return 0; +} +EXPORT_SYMBOL_GPL(snd_soc_resume); +#else +#define snd_soc_suspend NULL +#define snd_soc_resume NULL +#endif + +static const struct snd_soc_dai_ops null_dai_ops = { +}; + +static struct snd_soc_component *soc_find_component( + const struct device_node *of_node, const char *name) +{ + struct snd_soc_component *component; + + lockdep_assert_held(&client_mutex); + + list_for_each_entry(component, &component_list, list) { + if (of_node) { + if (component->dev->of_node == of_node) + return component; + } else if (strcmp(component->name, name) == 0) { + 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; + struct device_node *component_of_node; + + lockdep_assert_held(&client_mutex); + + /* Find CPU DAI from registered DAIs*/ + list_for_each_entry(component, &component_list, list) { + component_of_node = component->dev->of_node; + if (!component_of_node && component->dev->parent) + component_of_node = component->dev->parent->of_node; + + if (dlc->of_node && component_of_node != dlc->of_node) + continue; + if (dlc->name && strcmp(component->name, dlc->name)) + continue; + list_for_each_entry(dai, &component->dai_list, list) { + if (dlc->dai_name && strcmp(dai->name, dlc->dai_name) + && (!dai->driver->name + || strcmp(dai->driver->name, dlc->dai_name))) + continue; + + return dai; + } + } + + return NULL; +} +EXPORT_SYMBOL_GPL(snd_soc_find_dai); + + +/** + * snd_soc_find_dai_link - Find a DAI link + * + * @card: soc card + * @id: DAI link ID to match + * @name: DAI link name to match, optional + * @stream_name: DAI link stream name to match, optional + * + * This function will search all existing DAI links of the soc card to + * find the link of the same ID. Since DAI links may not have their + * unique ID, so name and stream name should also match if being + * specified. + * + * Return: pointer of DAI link, or NULL if not found. + */ +struct snd_soc_dai_link *snd_soc_find_dai_link(struct snd_soc_card *card, + int id, const char *name, + const char *stream_name) +{ + struct snd_soc_dai_link *link, *_link; + + lockdep_assert_held(&client_mutex); + + list_for_each_entry_safe(link, _link, &card->dai_link_list, list) { + if (link->id != id) + continue; + + if (name && (!link->name || strcmp(name, link->name))) + continue; + + if (stream_name && (!link->stream_name + || strcmp(stream_name, link->stream_name))) + continue; + + return link; + } + + return NULL; +} +EXPORT_SYMBOL_GPL(snd_soc_find_dai_link); + +static bool soc_is_dai_link_bound(struct snd_soc_card *card, + struct snd_soc_dai_link *dai_link) +{ + struct snd_soc_pcm_runtime *rtd; + + list_for_each_entry(rtd, &card->rtd_list, list) { + if (rtd->dai_link == dai_link) + return true; + } + + return false; +} + +static int soc_bind_dai_link(struct snd_soc_card *card, + struct snd_soc_dai_link *dai_link) +{ + struct snd_soc_pcm_runtime *rtd; + struct snd_soc_dai_link_component *codecs = dai_link->codecs; + struct snd_soc_dai_link_component cpu_dai_component; + struct snd_soc_component *component; + struct snd_soc_dai **codec_dais; + struct device_node *platform_of_node; + const char *platform_name; + int i; + + if (dai_link->ignore) + return 0; + + dev_dbg(card->dev, "ASoC: binding %s\n", dai_link->name); + + if (soc_is_dai_link_bound(card, dai_link)) { + dev_dbg(card->dev, "ASoC: dai link %s already bound\n", + dai_link->name); + return 0; + } + + rtd = soc_new_pcm_runtime(card, dai_link); + if (!rtd) + return -ENOMEM; + + cpu_dai_component.name = dai_link->cpu_name; + cpu_dai_component.of_node = dai_link->cpu_of_node; + cpu_dai_component.dai_name = dai_link->cpu_dai_name; + rtd->cpu_dai = snd_soc_find_dai(&cpu_dai_component); + if (!rtd->cpu_dai) { + dev_info(card->dev, "ASoC: CPU DAI %s not registered\n", + dai_link->cpu_dai_name); + goto _err_defer; + } + snd_soc_rtdcom_add(rtd, rtd->cpu_dai->component); + + rtd->num_codecs = dai_link->num_codecs; + + /* Find CODEC from registered CODECs */ + codec_dais = rtd->codec_dais; + for (i = 0; i < rtd->num_codecs; i++) { + codec_dais[i] = snd_soc_find_dai(&codecs[i]); + if (!codec_dais[i]) { + dev_err(card->dev, "ASoC: CODEC DAI %s not registered\n", + codecs[i].dai_name); + goto _err_defer; + } + snd_soc_rtdcom_add(rtd, codec_dais[i]->component); + } + + /* Single codec links expect codec and codec_dai in runtime data */ + rtd->codec_dai = codec_dais[0]; + + /* if there's no platform we match on the empty platform */ + platform_name = dai_link->platform_name; + if (!platform_name && !dai_link->platform_of_node) + platform_name = "snd-soc-dummy"; + + /* find one from the set of registered platforms */ + list_for_each_entry(component, &component_list, list) { + platform_of_node = component->dev->of_node; + if (!platform_of_node && component->dev->parent->of_node) + platform_of_node = component->dev->parent->of_node; + + if (dai_link->platform_of_node) { + if (platform_of_node != dai_link->platform_of_node) + continue; + } else { + if (strcmp(component->name, platform_name)) + continue; + } + + snd_soc_rtdcom_add(rtd, component); + } + + soc_add_pcm_runtime(card, rtd); + return 0; + +_err_defer: + soc_free_pcm_runtime(rtd); + return -EPROBE_DEFER; +} + +static void soc_remove_component(struct snd_soc_component *component) +{ + if (!component->card) + return; + + list_del(&component->card_list); + + if (component->driver->remove) + component->driver->remove(component); + + snd_soc_dapm_free(snd_soc_component_get_dapm(component)); + + soc_cleanup_component_debugfs(component); + component->card = NULL; + module_put(component->dev->driver->owner); +} + +static void soc_remove_dai(struct snd_soc_dai *dai, int order) +{ + int err; + + if (dai && dai->probed && + dai->driver->remove_order == order) { + if (dai->driver->remove) { + err = dai->driver->remove(dai); + if (err < 0) + dev_err(dai->dev, + "ASoC: failed to remove %s: %d\n", + dai->name, err); + } + dai->probed = 0; + } +} + +static void soc_remove_link_dais(struct snd_soc_card *card, + struct snd_soc_pcm_runtime *rtd, int order) +{ + int i; + + /* unregister the rtd device */ + if (rtd->dev_registered) { + device_unregister(rtd->dev); + rtd->dev_registered = 0; + } + + /* remove the CODEC DAI */ + for (i = 0; i < rtd->num_codecs; i++) + soc_remove_dai(rtd->codec_dais[i], order); + + soc_remove_dai(rtd->cpu_dai, order); +} + +static void soc_remove_link_components(struct snd_soc_card *card, + struct snd_soc_pcm_runtime *rtd, int order) +{ + struct snd_soc_component *component; + struct snd_soc_rtdcom_list *rtdcom; + + for_each_rtdcom(rtd, rtdcom) { + component = rtdcom->component; + + if (component->driver->remove_order == order) + soc_remove_component(component); + } +} + +static void soc_remove_dai_links(struct snd_soc_card *card) +{ + int order; + struct snd_soc_pcm_runtime *rtd; + struct snd_soc_dai_link *link, *_link; + + for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST; + order++) { + list_for_each_entry(rtd, &card->rtd_list, list) + soc_remove_link_dais(card, rtd, order); + } + + for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST; + order++) { + list_for_each_entry(rtd, &card->rtd_list, list) + soc_remove_link_components(card, rtd, order); + } + + list_for_each_entry_safe(link, _link, &card->dai_link_list, list) { + if (link->dobj.type == SND_SOC_DOBJ_DAI_LINK) + dev_warn(card->dev, "Topology forgot to remove link %s?\n", + link->name); + + list_del(&link->list); + card->num_dai_links--; + } +} + +static int snd_soc_init_multicodec(struct snd_soc_card *card, + struct snd_soc_dai_link *dai_link) +{ + /* Legacy codec/codec_dai link is a single entry in multicodec */ + if (dai_link->codec_name || dai_link->codec_of_node || + dai_link->codec_dai_name) { + dai_link->num_codecs = 1; + + dai_link->codecs = devm_kzalloc(card->dev, + sizeof(struct snd_soc_dai_link_component), + GFP_KERNEL); + if (!dai_link->codecs) + return -ENOMEM; + + dai_link->codecs[0].name = dai_link->codec_name; + dai_link->codecs[0].of_node = dai_link->codec_of_node; + dai_link->codecs[0].dai_name = dai_link->codec_dai_name; + } + + if (!dai_link->codecs) { + dev_err(card->dev, "ASoC: DAI link has no CODECs\n"); + return -EINVAL; + } + + return 0; +} + +static int soc_init_dai_link(struct snd_soc_card *card, + struct snd_soc_dai_link *link) +{ + int i, ret; + + ret = snd_soc_init_multicodec(card, link); + if (ret) { + dev_err(card->dev, "ASoC: failed to init multicodec\n"); + return ret; + } + + for (i = 0; i < link->num_codecs; i++) { + /* + * Codec must be specified by 1 of name or OF node, + * not both or neither. + */ + if (!!link->codecs[i].name == + !!link->codecs[i].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 (!link->codecs[i].dai_name) { + dev_err(card->dev, "ASoC: codec_dai_name not set for %s\n", + link->name); + return -EINVAL; + } + } + + /* + * Platform may be specified by either name or OF node, but + * can be left unspecified, and a dummy platform will be used. + */ + if (link->platform_name && link->platform_of_node) { + dev_err(card->dev, + "ASoC: Both platform name/of_node are set for %s\n", + link->name); + return -EINVAL; + } + + /* + * CPU device may be specified by either name or OF node, but + * can be left unspecified, and will be matched based on DAI + * name alone.. + */ + if (link->cpu_name && link->cpu_of_node) { + dev_err(card->dev, + "ASoC: Neither/both cpu name/of_node are set for %s\n", + link->name); + return -EINVAL; + } + /* + * At least one of CPU DAI name or CPU device name/node must be + * specified + */ + if (!link->cpu_dai_name && + !(link->cpu_name || link->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; +} + +void snd_soc_disconnect_sync(struct device *dev) +{ + struct snd_soc_component *component = snd_soc_lookup_component(dev, NULL); + + if (!component || !component->card) + return; + + snd_card_disconnect_sync(component->card->snd_card); +} +EXPORT_SYMBOL_GPL(snd_soc_disconnect_sync); + +/** + * snd_soc_add_dai_link - Add a DAI link dynamically + * @card: The ASoC card to which the DAI link is added + * @dai_link: The new DAI link to add + * + * This function adds a DAI link to the ASoC card's link list. + * + * Note: Topology can use this API to add DAI links when probing the + * topology component. And machine drivers can still define static + * DAI links in dai_link array. + */ +int snd_soc_add_dai_link(struct snd_soc_card *card, + struct snd_soc_dai_link *dai_link) +{ + if (dai_link->dobj.type + && dai_link->dobj.type != SND_SOC_DOBJ_DAI_LINK) { + dev_err(card->dev, "Invalid dai link type %d\n", + dai_link->dobj.type); + return -EINVAL; + } + + lockdep_assert_held(&client_mutex); + /* Notify the machine driver for extra initialization + * on the link created by topology. + */ + if (dai_link->dobj.type && card->add_dai_link) + card->add_dai_link(card, dai_link); + + list_add_tail(&dai_link->list, &card->dai_link_list); + card->num_dai_links++; + + return 0; +} +EXPORT_SYMBOL_GPL(snd_soc_add_dai_link); + +/** + * snd_soc_remove_dai_link - Remove a DAI link from the list + * @card: The ASoC card that owns the link + * @dai_link: The DAI link to remove + * + * This function removes a DAI link from the ASoC card's link list. + * + * For DAI links previously added by topology, topology should + * remove them by using the dobj embedded in the link. + */ +void snd_soc_remove_dai_link(struct snd_soc_card *card, + struct snd_soc_dai_link *dai_link) +{ + struct snd_soc_dai_link *link, *_link; + + if (dai_link->dobj.type + && dai_link->dobj.type != SND_SOC_DOBJ_DAI_LINK) { + dev_err(card->dev, "Invalid dai link type %d\n", + dai_link->dobj.type); + return; + } + + lockdep_assert_held(&client_mutex); + /* Notify the machine driver for extra destruction + * on the link created by topology. + */ + if (dai_link->dobj.type && card->remove_dai_link) + card->remove_dai_link(card, dai_link); + + list_for_each_entry_safe(link, _link, &card->dai_link_list, list) { + if (link == dai_link) { + list_del(&link->list); + card->num_dai_links--; + return; + } + } +} +EXPORT_SYMBOL_GPL(snd_soc_remove_dai_link); + +static void soc_set_of_name_prefix(struct snd_soc_component *component) +{ + struct device_node *component_of_node = component->dev->of_node; + const char *str; + int ret; + + if (!component_of_node && component->dev->parent) + component_of_node = component->dev->parent->of_node; + + ret = of_property_read_string(component_of_node, "sound-name-prefix", + &str); + if (!ret) + component->name_prefix = str; +} + +static void soc_set_name_prefix(struct snd_soc_card *card, + struct snd_soc_component *component) +{ + int i; + + for (i = 0; i < card->num_configs && card->codec_conf; i++) { + struct snd_soc_codec_conf *map = &card->codec_conf[i]; + struct device_node *component_of_node = component->dev->of_node; + + if (!component_of_node && component->dev->parent) + component_of_node = component->dev->parent->of_node; + + if (map->of_node && component_of_node != map->of_node) + continue; + if (map->dev_name && strcmp(component->name, map->dev_name)) + continue; + component->name_prefix = map->name_prefix; + return; + } + + /* + * If there is no configuration table or no match in the table, + * check if a prefix is provided in the node + */ + soc_set_of_name_prefix(component); +} + +static 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 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; + } + + if (!try_module_get(component->dev->driver->owner)) + return -ENODEV; + + component->card = card; + dapm->card = card; + soc_set_name_prefix(card, component); + + soc_init_component_debugfs(component); + + if (component->driver->dapm_widgets) { + 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; + } + } + + list_for_each_entry(dai, &component->dai_list, list) { + 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; + } + } + + if (component->driver->probe) { + ret = component->driver->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); + } + + /* machine specific init */ + if (component->init) { + ret = component->init(component); + if (ret < 0) { + dev_err(component->dev, + "Failed to do machine specific init %d\n", ret); + goto err_probe; + } + } + + if (component->driver->controls) + snd_soc_add_component_controls(component, + component->driver->controls, + component->driver->num_controls); + if (component->driver->dapm_routes) + snd_soc_dapm_add_routes(dapm, + component->driver->dapm_routes, + component->driver->num_dapm_routes); + + list_add(&dapm->list, &card->dapm_list); + list_add(&component->card_list, &card->component_dev_list); + + return 0; + +err_probe: + soc_cleanup_component_debugfs(component); + component->card = NULL; + module_put(component->dev->driver->owner); + + return ret; +} + +static void rtd_release(struct device *dev) +{ + kfree(dev); +} + +static int soc_post_component_init(struct snd_soc_pcm_runtime *rtd, + const char *name) +{ + int ret = 0; + + /* register the rtd device */ + rtd->dev = kzalloc(sizeof(struct device), GFP_KERNEL); + if (!rtd->dev) + return -ENOMEM; + device_initialize(rtd->dev); + rtd->dev->parent = rtd->card->dev; + rtd->dev->release = rtd_release; + rtd->dev->groups = soc_dev_attr_groups; + dev_set_name(rtd->dev, "%s", name); + dev_set_drvdata(rtd->dev, rtd); + mutex_init(&rtd->pcm_mutex); + INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_PLAYBACK].be_clients); + INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_CAPTURE].be_clients); + INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_PLAYBACK].fe_clients); + INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_CAPTURE].fe_clients); + ret = device_add(rtd->dev); + if (ret < 0) { + /* calling put_device() here to free the rtd->dev */ + put_device(rtd->dev); + dev_err(rtd->card->dev, + "ASoC: failed to register runtime device: %d\n", ret); + return ret; + } + rtd->dev_registered = 1; + return 0; +} + +static int soc_probe_link_components(struct snd_soc_card *card, + struct snd_soc_pcm_runtime *rtd, + int order) +{ + struct snd_soc_component *component; + struct snd_soc_rtdcom_list *rtdcom; + int ret; + + for_each_rtdcom(rtd, rtdcom) { + component = rtdcom->component; + + if (component->driver->probe_order == order) { + ret = soc_probe_component(card, component); + if (ret < 0) + return ret; + } + } + + return 0; +} + +static int soc_probe_dai(struct snd_soc_dai *dai, int order) +{ + if (dai->probed || + dai->driver->probe_order != order) + return 0; + + if (dai->driver->probe) { + int ret = dai->driver->probe(dai); + if (ret < 0) { + dev_err(dai->dev, "ASoC: failed to probe DAI %s: %d\n", + dai->name, ret); + return ret; + } + } + + dai->probed = 1; + + return 0; +} + +static int soc_link_dai_pcm_new(struct snd_soc_dai **dais, int num_dais, + struct snd_soc_pcm_runtime *rtd) +{ + int i, ret = 0; + + for (i = 0; i < num_dais; ++i) { + struct snd_soc_dai_driver *drv = dais[i]->driver; + + if (!rtd->dai_link->no_pcm && drv->pcm_new) + ret = drv->pcm_new(rtd, dais[i]); + if (ret < 0) { + dev_err(dais[i]->dev, + "ASoC: Failed to bind %s with pcm device\n", + dais[i]->name); + return ret; + } + } + + return 0; +} + +static int soc_link_dai_widgets(struct snd_soc_card *card, + struct snd_soc_dai_link *dai_link, + struct snd_soc_pcm_runtime *rtd) +{ + struct snd_soc_dai *cpu_dai = rtd->cpu_dai; + struct snd_soc_dai *codec_dai = rtd->codec_dai; + struct snd_soc_dapm_widget *sink, *source; + int ret; + + if (rtd->num_codecs > 1) + dev_warn(card->dev, "ASoC: Multiple codecs not supported yet\n"); + + /* link the DAI widgets */ + sink = codec_dai->playback_widget; + source = cpu_dai->capture_widget; + if (sink && source) { + ret = snd_soc_dapm_new_pcm(card, rtd, dai_link->params, + dai_link->num_params, + source, sink); + if (ret != 0) { + dev_err(card->dev, "ASoC: Can't link %s to %s: %d\n", + sink->name, source->name, ret); + return ret; + } + } + + sink = cpu_dai->playback_widget; + source = codec_dai->capture_widget; + if (sink && source) { + ret = snd_soc_dapm_new_pcm(card, rtd, dai_link->params, + dai_link->num_params, + source, sink); + if (ret != 0) { + dev_err(card->dev, "ASoC: Can't link %s to %s: %d\n", + sink->name, source->name, ret); + return ret; + } + } + + return 0; +} + +static int soc_probe_link_dais(struct snd_soc_card *card, + struct snd_soc_pcm_runtime *rtd, int order) +{ + struct snd_soc_dai_link *dai_link = rtd->dai_link; + struct snd_soc_dai *cpu_dai = rtd->cpu_dai; + struct snd_soc_rtdcom_list *rtdcom; + struct snd_soc_component *component; + int i, ret, num; + + dev_dbg(card->dev, "ASoC: probe %s dai link %d late %d\n", + card->name, rtd->num, order); + + /* set default power off timeout */ + rtd->pmdown_time = pmdown_time; + + ret = soc_probe_dai(cpu_dai, order); + if (ret) + return ret; + + /* probe the CODEC DAI */ + for (i = 0; i < rtd->num_codecs; i++) { + ret = soc_probe_dai(rtd->codec_dais[i], order); + if (ret) + return ret; + } + + /* complete DAI probe during last probe */ + if (order != SND_SOC_COMP_ORDER_LAST) + return 0; + + /* do machine specific initialization */ + if (dai_link->init) { + ret = dai_link->init(rtd); + if (ret < 0) { + dev_err(card->dev, "ASoC: failed to init %s: %d\n", + dai_link->name, ret); + return ret; + } + } + + if (dai_link->dai_fmt) + snd_soc_runtime_set_dai_fmt(rtd, dai_link->dai_fmt); + + ret = soc_post_component_init(rtd, dai_link->name); + if (ret) + return ret; + +#ifdef CONFIG_DEBUG_FS + /* add DPCM sysfs entries */ + if (dai_link->dynamic) + soc_dpcm_debugfs_add(rtd); +#endif + + 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_rtdcom(rtd, rtdcom) { + component = rtdcom->component; + + if (!component->driver->use_dai_pcm_id) + continue; + + if (rtd->dai_link->no_pcm) + num += component->driver->be_pcm_base; + else + num = rtd->dai_link->id; + } + + if (cpu_dai->driver->compress_new) { + /*create compress_device"*/ + ret = cpu_dai->driver->compress_new(rtd, num); + if (ret < 0) { + dev_err(card->dev, "ASoC: can't create compress %s\n", + dai_link->stream_name); + return ret; + } + } else { + + if (!dai_link->params) { + /* create the pcm */ + ret = soc_new_pcm(rtd, num); + if (ret < 0) { + dev_err(card->dev, "ASoC: can't create pcm %s :%d\n", + dai_link->stream_name, ret); + return ret; + } + ret = soc_link_dai_pcm_new(&cpu_dai, 1, rtd); + if (ret < 0) + return ret; + ret = soc_link_dai_pcm_new(rtd->codec_dais, + rtd->num_codecs, rtd); + if (ret < 0) + return ret; + } else { + INIT_DELAYED_WORK(&rtd->delayed_work, + codec2codec_close_delayed_work); + + /* link the DAI widgets */ + ret = soc_link_dai_widgets(card, dai_link, rtd); + if (ret) + return ret; + } + } + + return 0; +} + +static int soc_bind_aux_dev(struct snd_soc_card *card, int num) +{ + struct snd_soc_aux_dev *aux_dev = &card->aux_dev[num]; + struct snd_soc_component *component; + const char *name; + struct device_node *codec_of_node; + + if (aux_dev->codec_of_node || aux_dev->codec_name) { + /* codecs, usually analog devices */ + name = aux_dev->codec_name; + codec_of_node = aux_dev->codec_of_node; + component = soc_find_component(codec_of_node, name); + if (!component) { + if (codec_of_node) + name = of_node_full_name(codec_of_node); + goto err_defer; + } + } else if (aux_dev->name) { + /* generic components */ + name = aux_dev->name; + component = soc_find_component(NULL, name); + if (!component) + goto err_defer; + } else { + dev_err(card->dev, "ASoC: Invalid auxiliary device\n"); + return -EINVAL; + } + + component->init = aux_dev->init; + list_add(&component->card_aux_list, &card->aux_comp_list); + + return 0; + +err_defer: + dev_err(card->dev, "ASoC: %s not registered\n", name); + return -EPROBE_DEFER; +} + +static int soc_probe_aux_devices(struct snd_soc_card *card) +{ + struct snd_soc_component *comp; + int order; + int ret; + + for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST; + order++) { + list_for_each_entry(comp, &card->aux_comp_list, card_aux_list) { + if (comp->driver->probe_order == order) { + ret = soc_probe_component(card, comp); + if (ret < 0) { + dev_err(card->dev, + "ASoC: failed to probe aux component %s %d\n", + comp->name, ret); + return ret; + } + } + } + } + + return 0; +} + +static void soc_remove_aux_devices(struct snd_soc_card *card) +{ + struct snd_soc_component *comp, *_comp; + int order; + + for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST; + order++) { + list_for_each_entry_safe(comp, _comp, + &card->aux_comp_list, card_aux_list) { + + if (comp->driver->remove_order == order) { + soc_remove_component(comp); + /* remove it from the card's aux_comp_list */ + list_del(&comp->card_aux_list); + } + } + } +} + +/** + * 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 **codec_dais = rtd->codec_dais; + struct snd_soc_dai *cpu_dai = rtd->cpu_dai; + unsigned int i; + int ret; + + for (i = 0; i < rtd->num_codecs; i++) { + struct snd_soc_dai *codec_dai = codec_dais[i]; + + ret = snd_soc_dai_set_fmt(codec_dai, dai_fmt); + if (ret != 0 && ret != -ENOTSUPP) { + dev_warn(codec_dai->dev, + "ASoC: Failed to set DAI format: %d\n", ret); + return ret; + } + } + + /* Flip the polarity for the "CPU" end of a CODEC<->CODEC link */ + /* the component which has non_legacy_dai_naming is Codec */ + if (cpu_dai->component->driver->non_legacy_dai_naming) { + unsigned int inv_dai_fmt; + + inv_dai_fmt = dai_fmt & ~SND_SOC_DAIFMT_MASTER_MASK; + switch (dai_fmt & SND_SOC_DAIFMT_MASTER_MASK) { + case SND_SOC_DAIFMT_CBM_CFM: + inv_dai_fmt |= SND_SOC_DAIFMT_CBS_CFS; + break; + case SND_SOC_DAIFMT_CBM_CFS: + inv_dai_fmt |= SND_SOC_DAIFMT_CBS_CFM; + break; + case SND_SOC_DAIFMT_CBS_CFM: + inv_dai_fmt |= SND_SOC_DAIFMT_CBM_CFS; + break; + case SND_SOC_DAIFMT_CBS_CFS: + inv_dai_fmt |= SND_SOC_DAIFMT_CBM_CFM; + break; + } + + dai_fmt = inv_dai_fmt; + } + + ret = snd_soc_dai_set_fmt(cpu_dai, dai_fmt); + if (ret != 0 && ret != -ENOTSUPP) { + dev_warn(cpu_dai->dev, + "ASoC: Failed to set DAI format: %d\n", ret); + return ret; + } + + return 0; +} +EXPORT_SYMBOL_GPL(snd_soc_runtime_set_dai_fmt); + + +#ifdef CONFIG_DMI +/* Trim special characters, and replace '-' with '_' since '-' is used to + * separate different DMI fields in the card long name. Only number and + * alphabet characters and a few separator characters are kept. + */ +static void cleanup_dmi_name(char *name) +{ + int i, j = 0; + + for (i = 0; name[i]; i++) { + if (isalnum(name[i]) || (name[i] == '.') + || (name[i] == '_')) + name[j++] = name[i]; + else if (name[i] == '-') + name[j++] = '_'; + } + + name[j] = '\0'; +} + +/* Check if a DMI field is valid, i.e. not containing any string + * in the black list. + */ +static int is_dmi_valid(const char *field) +{ + int i = 0; + + while (dmi_blacklist[i]) { + if (strstr(field, dmi_blacklist[i])) + return 0; + i++; + } + + return 1; +} + +/** + * 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; + size_t longname_buf_size = sizeof(card->snd_card->longname); + size_t len; + + if (card->long_name) + return 0; /* long name already set by driver or from DMI */ + + /* make up dmi long name as: vendor.product.version.board */ + vendor = dmi_get_system_info(DMI_BOARD_VENDOR); + if (!vendor || !is_dmi_valid(vendor)) { + dev_warn(card->dev, "ASoC: no DMI vendor name!\n"); + return 0; + } + + + snprintf(card->dmi_longname, sizeof(card->snd_card->longname), + "%s", vendor); + cleanup_dmi_name(card->dmi_longname); + + product = dmi_get_system_info(DMI_PRODUCT_NAME); + if (product && is_dmi_valid(product)) { + len = strlen(card->dmi_longname); + snprintf(card->dmi_longname + len, + longname_buf_size - len, + "-%s", product); + + len++; /* skip the separator "-" */ + if (len < longname_buf_size) + cleanup_dmi_name(card->dmi_longname + len); + + /* 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)) { + len = strlen(card->dmi_longname); + snprintf(card->dmi_longname + len, + longname_buf_size - len, + "-%s", product_version); + + len++; + if (len < longname_buf_size) + cleanup_dmi_name(card->dmi_longname + len); + } + } + + board = dmi_get_system_info(DMI_BOARD_NAME); + if (board && is_dmi_valid(board)) { + len = strlen(card->dmi_longname); + snprintf(card->dmi_longname + len, + longname_buf_size - len, + "-%s", board); + + len++; + if (len < longname_buf_size) + cleanup_dmi_name(card->dmi_longname + len); + } 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) { + len = strlen(card->dmi_longname); + snprintf(card->dmi_longname + len, + longname_buf_size - len, + "-%s", flavour); + + len++; + if (len < longname_buf_size) + cleanup_dmi_name(card->dmi_longname + len); + } + + /* 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; + + list_for_each_entry(component, &component_list, list) { + + /* does this component override FEs ? */ + if (!component->driver->ignore_machine) + continue; + + /* for this machine ? */ + if (strcmp(component->driver->ignore_machine, + card->dev->driver->name)) + continue; + + /* machine matches, so override the rtd data */ + for (i = 0; i < card->num_links; i++) { + + dai_link = &card->dai_link[i]; + + /* ignore this FE */ + if (dai_link->dynamic) { + dai_link->ignore = true; + continue; + } + + dev_info(card->dev, "info: override FE DAI link %s\n", + card->dai_link[i].name); + + /* override platform component */ + dai_link->platform_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 */ + 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; + } + } +} + +static int snd_soc_instantiate_card(struct snd_soc_card *card) +{ + struct snd_soc_pcm_runtime *rtd; + struct snd_soc_dai_link *dai_link; + int ret, i, order; + + mutex_lock(&client_mutex); + mutex_lock_nested(&card->mutex, SND_SOC_CARD_CLASS_INIT); + + /* check whether any platform is ignore machine FE and using topology */ + soc_check_tplg_fes(card); + + /* bind DAIs */ + for (i = 0; i < card->num_links; i++) { + ret = soc_bind_dai_link(card, &card->dai_link[i]); + if (ret != 0) + goto base_error; + } + + /* bind aux_devs too */ + for (i = 0; i < card->num_aux_devs; i++) { + ret = soc_bind_aux_dev(card, i); + if (ret != 0) + goto base_error; + } + + /* add predefined DAI links to the list */ + for (i = 0; i < card->num_links; i++) + snd_soc_add_dai_link(card, card->dai_link+i); + + /* 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 base_error; + } + + soc_init_card_debugfs(card); + + card->dapm.bias_level = SND_SOC_BIAS_OFF; + card->dapm.dev = card->dev; + card->dapm.card = card; + list_add(&card->dapm.list, &card->dapm_list); + +#ifdef CONFIG_DEBUG_FS + snd_soc_dapm_debugfs_init(&card->dapm, card->debugfs_card_root); +#endif + +#ifdef CONFIG_PM_SLEEP + /* deferred resume work */ + INIT_WORK(&card->deferred_resume_work, soc_resume_deferred); +#endif + + if (card->dapm_widgets) + snd_soc_dapm_new_controls(&card->dapm, card->dapm_widgets, + card->num_dapm_widgets); + + if (card->of_dapm_widgets) + snd_soc_dapm_new_controls(&card->dapm, card->of_dapm_widgets, + card->num_of_dapm_widgets); + + /* initialise the sound card only once */ + if (card->probe) { + ret = card->probe(card); + if (ret < 0) + goto card_probe_error; + } + + /* probe all components used by DAI links on this card */ + for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST; + order++) { + list_for_each_entry(rtd, &card->rtd_list, list) { + ret = soc_probe_link_components(card, rtd, order); + if (ret < 0) { + dev_err(card->dev, + "ASoC: failed to instantiate card %d\n", + ret); + goto probe_dai_err; + } + } + } + + /* probe auxiliary components */ + ret = soc_probe_aux_devices(card); + if (ret < 0) + goto probe_dai_err; + + /* Find new DAI links added during probing components and bind them. + * Components with topology may bring new DAIs and DAI links. + */ + list_for_each_entry(dai_link, &card->dai_link_list, list) { + if (soc_is_dai_link_bound(card, dai_link)) + continue; + + ret = soc_init_dai_link(card, dai_link); + if (ret) + goto probe_dai_err; + ret = soc_bind_dai_link(card, dai_link); + if (ret) + goto probe_dai_err; + } + + /* probe all DAI links on this card */ + for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST; + order++) { + list_for_each_entry(rtd, &card->rtd_list, list) { + ret = soc_probe_link_dais(card, rtd, order); + if (ret < 0) { + dev_err(card->dev, + "ASoC: failed to instantiate card %d\n", + ret); + goto probe_dai_err; + } + } + } + + snd_soc_dapm_link_dai_widgets(card); + snd_soc_dapm_connect_dai_link_widgets(card); + + if (card->controls) + snd_soc_add_card_controls(card, card->controls, card->num_controls); + + if (card->dapm_routes) + snd_soc_dapm_add_routes(&card->dapm, card->dapm_routes, + card->num_dapm_routes); + + if (card->of_dapm_routes) + snd_soc_dapm_add_routes(&card->dapm, card->of_dapm_routes, + card->num_of_dapm_routes); + + /* try to set some sane longname if DMI is available */ + snd_soc_set_dmi_name(card, NULL); + + snprintf(card->snd_card->shortname, sizeof(card->snd_card->shortname), + "%s", card->name); + snprintf(card->snd_card->longname, sizeof(card->snd_card->longname), + "%s", card->long_name ? card->long_name : card->name); + snprintf(card->snd_card->driver, sizeof(card->snd_card->driver), + "%s", card->driver_name ? card->driver_name : card->name); + for (i = 0; i < ARRAY_SIZE(card->snd_card->driver); i++) { + switch (card->snd_card->driver[i]) { + case '_': + case '-': + case '\0': + break; + default: + if (!isalnum(card->snd_card->driver[i])) + card->snd_card->driver[i] = '_'; + break; + } + } + + if (card->late_probe) { + ret = card->late_probe(card); + if (ret < 0) { + dev_err(card->dev, "ASoC: %s late_probe() failed: %d\n", + card->name, ret); + goto probe_aux_dev_err; + } + } + + 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_aux_dev_err; + } + + card->instantiated = 1; + dapm_mark_endpoints_dirty(card); + snd_soc_dapm_sync(&card->dapm); + mutex_unlock(&card->mutex); + mutex_unlock(&client_mutex); + + return 0; + +probe_aux_dev_err: + soc_remove_aux_devices(card); + +probe_dai_err: + soc_remove_dai_links(card); + +card_probe_error: + if (card->remove) + card->remove(card); + + snd_soc_dapm_free(&card->dapm); + soc_cleanup_card_debugfs(card); + snd_card_free(card->snd_card); + +base_error: + soc_remove_pcm_runtimes(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 snd_soc_register_card(card); +} + +static int soc_cleanup_card_resources(struct snd_soc_card *card) +{ + struct snd_soc_pcm_runtime *rtd; + + /* make sure any delayed work runs */ + list_for_each_entry(rtd, &card->rtd_list, list) + flush_delayed_work(&rtd->delayed_work); + + /* free the ALSA card at first; this syncs with pending operations */ + snd_card_free(card->snd_card); + + /* remove and free each DAI */ + soc_remove_dai_links(card); + soc_remove_pcm_runtimes(card); + + /* remove auxiliary devices */ + soc_remove_aux_devices(card); + + snd_soc_dapm_free(&card->dapm); + soc_cleanup_card_debugfs(card); + + /* remove the card */ + if (card->remove) + card->remove(card); + + return 0; +} + +/* removes a socdev */ +static int soc_remove(struct platform_device *pdev) +{ + struct snd_soc_card *card = platform_get_drvdata(pdev); + + snd_soc_unregister_card(card); + return 0; +} + +int snd_soc_poweroff(struct device *dev) +{ + struct snd_soc_card *card = dev_get_drvdata(dev); + struct snd_soc_pcm_runtime *rtd; + + if (!card->instantiated) + return 0; + + /* Flush out pmdown_time work - we actually do want to run it + * now, we're shutting down so no imminent restart. */ + list_for_each_entry(rtd, &card->rtd_list, list) + flush_delayed_work(&rtd->delayed_work); + + snd_soc_dapm_shutdown(card); + + /* deactivate pins to sleep state */ + list_for_each_entry(rtd, &card->rtd_list, list) { + struct snd_soc_dai *cpu_dai = rtd->cpu_dai; + int i; + + pinctrl_pm_select_sleep_state(cpu_dai->dev); + for (i = 0; i < rtd->num_codecs; i++) { + struct snd_soc_dai *codec_dai = rtd->codec_dais[i]; + pinctrl_pm_select_sleep_state(codec_dai->dev); + } + } + + return 0; +} +EXPORT_SYMBOL_GPL(snd_soc_poweroff); + +const struct dev_pm_ops snd_soc_pm_ops = { + .suspend = snd_soc_suspend, + .resume = snd_soc_resume, + .freeze = snd_soc_suspend, + .thaw = snd_soc_resume, + .poweroff = snd_soc_poweroff, + .restore = snd_soc_resume, +}; +EXPORT_SYMBOL_GPL(snd_soc_pm_ops); + +/* ASoC platform driver */ +static struct platform_driver soc_driver = { + .driver = { + .name = "soc-audio", + .pm = &snd_soc_pm_ops, + }, + .probe = soc_probe, + .remove = soc_remove, +}; + +/** + * snd_soc_cnew - create new control + * @_template: control template + * @data: control private data + * @long_name: control long name + * @prefix: control name prefix + * + * Create a new mixer control from a template control. + * + * Returns 0 for success, else error. + */ +struct snd_kcontrol *snd_soc_cnew(const struct snd_kcontrol_new *_template, + void *data, const char *long_name, + const char *prefix) +{ + struct snd_kcontrol_new template; + struct snd_kcontrol *kcontrol; + char *name = NULL; + + memcpy(&template, _template, sizeof(template)); + template.index = 0; + + if (!long_name) + long_name = template.name; + + if (prefix) { + name = kasprintf(GFP_KERNEL, "%s %s", prefix, long_name); + if (!name) + return NULL; + + template.name = name; + } else { + template.name = long_name; + } + + kcontrol = snd_ctl_new1(&template, data); + + kfree(name); + + return kcontrol; +} +EXPORT_SYMBOL_GPL(snd_soc_cnew); + +static int snd_soc_add_controls(struct snd_card *card, struct device *dev, + const struct snd_kcontrol_new *controls, int num_controls, + const char *prefix, void *data) +{ + int err, i; + + for (i = 0; i < num_controls; i++) { + const struct snd_kcontrol_new *control = &controls[i]; + err = snd_ctl_add(card, snd_soc_cnew(control, data, + control->name, prefix)); + if (err < 0) { + dev_err(dev, "ASoC: Failed to add %s: %d\n", + control->name, err); + return err; + } + } + + return 0; +} + +struct snd_kcontrol *snd_soc_card_get_kcontrol(struct snd_soc_card *soc_card, + const char *name) +{ + struct snd_card *card = soc_card->snd_card; + struct snd_kcontrol *kctl; + + if (unlikely(!name)) + return NULL; + + list_for_each_entry(kctl, &card->controls, list) + if (!strncmp(kctl->id.name, name, sizeof(kctl->id.name))) + return kctl; + return NULL; +} +EXPORT_SYMBOL_GPL(snd_soc_card_get_kcontrol); + +/** + * snd_soc_add_component_controls - Add an array of controls to a component. + * + * @component: Component to add controls to + * @controls: Array of controls to add + * @num_controls: Number of elements in the array + * + * Return: 0 for success, else error. + */ +int snd_soc_add_component_controls(struct snd_soc_component *component, + const struct snd_kcontrol_new *controls, unsigned int num_controls) +{ + struct snd_card *card = component->card->snd_card; + + return snd_soc_add_controls(card, component->dev, controls, + num_controls, component->name_prefix, component); +} +EXPORT_SYMBOL_GPL(snd_soc_add_component_controls); + +/** + * snd_soc_add_card_controls - add an array of controls to a SoC card. + * Convenience function to add a list of controls. + * + * @soc_card: SoC card to add controls to + * @controls: array of controls to add + * @num_controls: number of elements in the array + * + * Return 0 for success, else error. + */ +int snd_soc_add_card_controls(struct snd_soc_card *soc_card, + const struct snd_kcontrol_new *controls, int num_controls) +{ + struct snd_card *card = soc_card->snd_card; + + return snd_soc_add_controls(card, soc_card->dev, controls, num_controls, + NULL, soc_card); +} +EXPORT_SYMBOL_GPL(snd_soc_add_card_controls); + +/** + * snd_soc_add_dai_controls - add an array of controls to a DAI. + * Convienience function to add a list of controls. + * + * @dai: DAI to add controls to + * @controls: array of controls to add + * @num_controls: number of elements in the array + * + * Return 0 for success, else error. + */ +int snd_soc_add_dai_controls(struct snd_soc_dai *dai, + const struct snd_kcontrol_new *controls, int num_controls) +{ + struct snd_card *card = dai->component->card->snd_card; + + return snd_soc_add_controls(card, dai->dev, controls, num_controls, + NULL, dai); +} +EXPORT_SYMBOL_GPL(snd_soc_add_dai_controls); + +/** + * snd_soc_dai_set_sysclk - configure DAI system or master clock. + * @dai: DAI + * @clk_id: DAI specific clock ID + * @freq: new clock frequency in Hz + * @dir: new clock direction - input/output. + * + * Configures the DAI master (MCLK) or system (SYSCLK) clocking. + */ +int snd_soc_dai_set_sysclk(struct snd_soc_dai *dai, int clk_id, + unsigned int freq, int dir) +{ + if (dai->driver->ops->set_sysclk) + return dai->driver->ops->set_sysclk(dai, clk_id, freq, dir); + + return snd_soc_component_set_sysclk(dai->component, clk_id, 0, + freq, dir); +} +EXPORT_SYMBOL_GPL(snd_soc_dai_set_sysclk); + +/** + * snd_soc_component_set_sysclk - configure COMPONENT system or master clock. + * @component: COMPONENT + * @clk_id: DAI specific clock ID + * @source: Source for the clock + * @freq: new clock frequency in Hz + * @dir: new clock direction - input/output. + * + * Configures the CODEC master (MCLK) or system (SYSCLK) clocking. + */ +int snd_soc_component_set_sysclk(struct snd_soc_component *component, int clk_id, + int source, unsigned int freq, int dir) +{ + if (component->driver->set_sysclk) + return component->driver->set_sysclk(component, clk_id, source, + freq, dir); + + return -ENOTSUPP; +} +EXPORT_SYMBOL_GPL(snd_soc_component_set_sysclk); + +/** + * snd_soc_dai_set_clkdiv - configure DAI clock dividers. + * @dai: DAI + * @div_id: DAI specific clock divider ID + * @div: new clock divisor. + * + * Configures the clock dividers. This is used to derive the best DAI bit and + * frame clocks from the system or master clock. It's best to set the DAI bit + * and frame clocks as low as possible to save system power. + */ +int snd_soc_dai_set_clkdiv(struct snd_soc_dai *dai, + int div_id, int div) +{ + if (dai->driver->ops->set_clkdiv) + return dai->driver->ops->set_clkdiv(dai, div_id, div); + else + return -EINVAL; +} +EXPORT_SYMBOL_GPL(snd_soc_dai_set_clkdiv); + +/** + * snd_soc_dai_set_pll - configure DAI PLL. + * @dai: DAI + * @pll_id: DAI specific PLL ID + * @source: DAI specific source for the PLL + * @freq_in: PLL input clock frequency in Hz + * @freq_out: requested PLL output clock frequency in Hz + * + * Configures and enables PLL to generate output clock based on input clock. + */ +int snd_soc_dai_set_pll(struct snd_soc_dai *dai, int pll_id, int source, + unsigned int freq_in, unsigned int freq_out) +{ + if (dai->driver->ops->set_pll) + return dai->driver->ops->set_pll(dai, pll_id, source, + freq_in, freq_out); + + return snd_soc_component_set_pll(dai->component, pll_id, source, + freq_in, freq_out); +} +EXPORT_SYMBOL_GPL(snd_soc_dai_set_pll); + +/* + * snd_soc_component_set_pll - configure component PLL. + * @component: COMPONENT + * @pll_id: DAI specific PLL ID + * @source: DAI specific source for the PLL + * @freq_in: PLL input clock frequency in Hz + * @freq_out: requested PLL output clock frequency in Hz + * + * Configures and enables PLL to generate output clock based on input clock. + */ +int snd_soc_component_set_pll(struct snd_soc_component *component, int pll_id, + int source, unsigned int freq_in, + unsigned int freq_out) +{ + if (component->driver->set_pll) + return component->driver->set_pll(component, pll_id, source, + freq_in, freq_out); + + return -EINVAL; +} +EXPORT_SYMBOL_GPL(snd_soc_component_set_pll); + +/** + * snd_soc_dai_set_bclk_ratio - configure BCLK to sample rate ratio. + * @dai: DAI + * @ratio: Ratio of BCLK to Sample rate. + * + * Configures the DAI for a preset BCLK to sample rate ratio. + */ +int snd_soc_dai_set_bclk_ratio(struct snd_soc_dai *dai, unsigned int ratio) +{ + if (dai->driver->ops->set_bclk_ratio) + return dai->driver->ops->set_bclk_ratio(dai, ratio); + else + return -EINVAL; +} +EXPORT_SYMBOL_GPL(snd_soc_dai_set_bclk_ratio); + +/** + * snd_soc_dai_set_fmt - configure DAI hardware audio format. + * @dai: DAI + * @fmt: SND_SOC_DAIFMT_* format value. + * + * Configures the DAI hardware format and clocking. + */ +int snd_soc_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt) +{ + if (dai->driver == NULL) + return -EINVAL; + if (dai->driver->ops->set_fmt == NULL) + return -ENOTSUPP; + return dai->driver->ops->set_fmt(dai, fmt); +} +EXPORT_SYMBOL_GPL(snd_soc_dai_set_fmt); + +/** + * snd_soc_xlate_tdm_slot - generate tx/rx slot mask. + * @slots: Number of slots in use. + * @tx_mask: bitmask representing active TX slots. + * @rx_mask: bitmask representing active RX slots. + * + * Generates the TDM tx and rx slot default masks for DAI. + */ +static int snd_soc_xlate_tdm_slot_mask(unsigned int slots, + unsigned int *tx_mask, + unsigned int *rx_mask) +{ + if (*tx_mask || *rx_mask) + return 0; + + if (!slots) + return -EINVAL; + + *tx_mask = (1 << slots) - 1; + *rx_mask = (1 << slots) - 1; + + return 0; +} + +/** + * snd_soc_dai_set_tdm_slot() - Configures a DAI for TDM operation + * @dai: The DAI to configure + * @tx_mask: bitmask representing active TX slots. + * @rx_mask: bitmask representing active RX slots. + * @slots: Number of slots in use. + * @slot_width: Width in bits for each slot. + * + * This function configures the specified DAI for TDM operation. @slot contains + * the total number of slots of the TDM stream and @slot_with the width of each + * slot in bit clock cycles. @tx_mask and @rx_mask are bitmasks specifying the + * active slots of the TDM stream for the specified DAI, i.e. which slots the + * DAI should write to or read from. If a bit is set the corresponding slot is + * active, if a bit is cleared the corresponding slot is inactive. Bit 0 maps to + * the first slot, bit 1 to the second slot and so on. The first active slot + * maps to the first channel of the DAI, the second active slot to the second + * channel and so on. + * + * TDM mode can be disabled by passing 0 for @slots. In this case @tx_mask, + * @rx_mask and @slot_width will be ignored. + * + * Returns 0 on success, a negative error code otherwise. + */ +int snd_soc_dai_set_tdm_slot(struct snd_soc_dai *dai, + unsigned int tx_mask, unsigned int rx_mask, int slots, int slot_width) +{ + if (dai->driver->ops->xlate_tdm_slot_mask) + dai->driver->ops->xlate_tdm_slot_mask(slots, + &tx_mask, &rx_mask); + else + snd_soc_xlate_tdm_slot_mask(slots, &tx_mask, &rx_mask); + + dai->tx_mask = tx_mask; + dai->rx_mask = rx_mask; + + if (dai->driver->ops->set_tdm_slot) + return dai->driver->ops->set_tdm_slot(dai, tx_mask, rx_mask, + slots, slot_width); + else + return -ENOTSUPP; +} +EXPORT_SYMBOL_GPL(snd_soc_dai_set_tdm_slot); + +/** + * snd_soc_dai_set_channel_map - configure DAI audio channel map + * @dai: DAI + * @tx_num: how many TX channels + * @tx_slot: pointer to an array which imply the TX slot number channel + * 0~num-1 uses + * @rx_num: how many RX channels + * @rx_slot: pointer to an array which imply the RX slot number channel + * 0~num-1 uses + * + * configure the relationship between channel number and TDM slot number. + */ +int snd_soc_dai_set_channel_map(struct snd_soc_dai *dai, + unsigned int tx_num, unsigned int *tx_slot, + unsigned int rx_num, unsigned int *rx_slot) +{ + if (dai->driver->ops->set_channel_map) + return dai->driver->ops->set_channel_map(dai, tx_num, tx_slot, + rx_num, rx_slot); + else + return -EINVAL; +} +EXPORT_SYMBOL_GPL(snd_soc_dai_set_channel_map); + +/** + * snd_soc_dai_get_channel_map - Get DAI audio channel map + * @dai: DAI + * @tx_num: how many TX channels + * @tx_slot: pointer to an array which imply the TX slot number channel + * 0~num-1 uses + * @rx_num: how many RX channels + * @rx_slot: pointer to an array which imply the RX slot number channel + * 0~num-1 uses + */ +int snd_soc_dai_get_channel_map(struct snd_soc_dai *dai, + unsigned int *tx_num, unsigned int *tx_slot, + unsigned int *rx_num, unsigned int *rx_slot) +{ + if (dai->driver->ops->get_channel_map) + return dai->driver->ops->get_channel_map(dai, tx_num, tx_slot, + rx_num, rx_slot); + else + return -ENOTSUPP; +} +EXPORT_SYMBOL_GPL(snd_soc_dai_get_channel_map); + +/** + * snd_soc_dai_set_tristate - configure DAI system or master clock. + * @dai: DAI + * @tristate: tristate enable + * + * Tristates the DAI so that others can use it. + */ +int snd_soc_dai_set_tristate(struct snd_soc_dai *dai, int tristate) +{ + if (dai->driver->ops->set_tristate) + return dai->driver->ops->set_tristate(dai, tristate); + else + return -EINVAL; +} +EXPORT_SYMBOL_GPL(snd_soc_dai_set_tristate); + +/** + * snd_soc_dai_digital_mute - configure DAI system or master clock. + * @dai: DAI + * @mute: mute enable + * @direction: stream to mute + * + * Mutes the DAI DAC. + */ +int snd_soc_dai_digital_mute(struct snd_soc_dai *dai, int mute, + int direction) +{ + if (!dai->driver) + return -ENOTSUPP; + + if (dai->driver->ops->mute_stream) + return dai->driver->ops->mute_stream(dai, mute, direction); + else if (direction == SNDRV_PCM_STREAM_PLAYBACK && + dai->driver->ops->digital_mute) + return dai->driver->ops->digital_mute(dai, mute); + else + return -ENOTSUPP; +} +EXPORT_SYMBOL_GPL(snd_soc_dai_digital_mute); + +/** + * 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) +{ + int i, ret; + struct snd_soc_pcm_runtime *rtd; + + if (!card->name || !card->dev) + return -EINVAL; + + for (i = 0; i < card->num_links; i++) { + struct snd_soc_dai_link *link = &card->dai_link[i]; + + ret = soc_init_dai_link(card, link); + if (ret) { + dev_err(card->dev, "ASoC: failed to init link %s\n", + link->name); + return ret; + } + } + + dev_set_drvdata(card->dev, card); + + snd_soc_initialize_card_lists(card); + + INIT_LIST_HEAD(&card->dai_link_list); + card->num_dai_links = 0; + + INIT_LIST_HEAD(&card->rtd_list); + card->num_rtd = 0; + + INIT_LIST_HEAD(&card->dapm_dirty); + INIT_LIST_HEAD(&card->dobj_list); + card->instantiated = 0; + mutex_init(&card->mutex); + mutex_init(&card->dapm_mutex); + spin_lock_init(&card->dpcm_lock); + + ret = snd_soc_instantiate_card(card); + if (ret != 0) + return ret; + + /* deactivate pins to sleep state */ + list_for_each_entry(rtd, &card->rtd_list, list) { + struct snd_soc_dai *cpu_dai = rtd->cpu_dai; + int j; + + for (j = 0; j < rtd->num_codecs; j++) { + struct snd_soc_dai *codec_dai = rtd->codec_dais[j]; + if (!codec_dai->active) + pinctrl_pm_select_sleep_state(codec_dai->dev); + } + + if (!cpu_dai->active) + pinctrl_pm_select_sleep_state(cpu_dai->dev); + } + + return ret; +} +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) +{ + if (card->instantiated) { + card->instantiated = false; + snd_soc_dapm_shutdown(card); + soc_cleanup_card_resources(card); + dev_dbg(card->dev, "ASoC: Unregistered card '%s'\n", card->name); + } + + return 0; +} +EXPORT_SYMBOL_GPL(snd_soc_unregister_card); + +/* + * Simplify DAI link configuration by removing ".-1" from device names + * and sanitizing names. + */ +static char *fmt_single_name(struct device *dev, int *id) +{ + char *found, name[NAME_SIZE]; + int id1, id2; + + if (dev_name(dev) == NULL) + return NULL; + + strlcpy(name, dev_name(dev), NAME_SIZE); + + /* are we a "%s.%d" name (platform and SPI components) */ + found = strstr(name, dev->driver->name); + if (found) { + /* get ID */ + if (sscanf(&found[strlen(dev->driver->name)], ".%d", id) == 1) { + + /* discard ID from name if ID == -1 */ + if (*id == -1) + found[strlen(dev->driver->name)] = '\0'; + } + + } else { + /* I2C component devices are named "bus-addr" */ + if (sscanf(name, "%x-%x", &id1, &id2) == 2) { + char tmp[NAME_SIZE]; + + /* create unique ID number from I2C addr and bus */ + *id = ((id1 & 0xffff) << 16) + id2; + + /* sanitize component name for DAI link creation */ + snprintf(tmp, NAME_SIZE, "%s.%s", dev->driver->name, name); + strlcpy(name, tmp, NAME_SIZE); + } else + *id = 0; + } + + return kstrdup(name, GFP_KERNEL); +} + +/* + * Simplify DAI link naming for single devices with multiple DAIs by removing + * any ".-1" and using the DAI name (instead of device name). + */ +static inline char *fmt_multiple_name(struct device *dev, + struct snd_soc_dai_driver *dai_drv) +{ + if (dai_drv->name == NULL) { + dev_err(dev, + "ASoC: error - multiple DAI %s registered with no name\n", + dev_name(dev)); + return NULL; + } + + return kstrdup(dai_drv->name, GFP_KERNEL); +} + +/** + * snd_soc_unregister_dai - Unregister DAIs from the ASoC core + * + * @component: The component for which the DAIs should be unregistered + */ +static void snd_soc_unregister_dais(struct snd_soc_component *component) +{ + struct snd_soc_dai *dai, *_dai; + + list_for_each_entry_safe(dai, _dai, &component->dai_list, list) { + dev_dbg(component->dev, "ASoC: Unregistered DAI '%s'\n", + dai->name); + list_del(&dai->list); + kfree(dai->name); + kfree(dai); + } +} + +/* Create a DAI and add it to the component's DAI list */ +static struct snd_soc_dai *soc_add_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)); + + dai = kzalloc(sizeof(struct snd_soc_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 == NULL) { + kfree(dai); + return NULL; + } + + dai->component = component; + dai->dev = dev; + dai->driver = dai_drv; + if (!dai->driver->ops) + dai->driver->ops = &null_dai_ops; + + 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_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 + * @legacy_dai_naming: Use the legacy naming scheme and let the DAI inherit the + * parent's name. + */ +static int snd_soc_register_dais(struct snd_soc_component *component, + struct snd_soc_dai_driver *dai_drv, size_t count) +{ + struct device *dev = component->dev; + struct snd_soc_dai *dai; + unsigned int i; + int ret; + + dev_dbg(dev, "ASoC: dai register %s #%zu\n", dev_name(dev), count); + + for (i = 0; i < count; i++) { + + dai = soc_add_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; +} + +/** + * snd_soc_register_dai - Register a DAI dynamically & create its widgets + * + * @component: The component the DAIs are registered for + * @dai_drv: DAI driver to use for the DAI + * + * Topology can use this API to register DAIs when probing a component. + * These DAIs's widgets will be freed in the card cleanup and the DAIs + * will be freed in the component cleanup. + */ +int snd_soc_register_dai(struct snd_soc_component *component, + struct snd_soc_dai_driver *dai_drv) +{ + struct snd_soc_dapm_context *dapm = + snd_soc_component_get_dapm(component); + struct snd_soc_dai *dai; + int ret; + + if (dai_drv->dobj.type != SND_SOC_DOBJ_PCM) { + dev_err(component->dev, "Invalid dai type %d\n", + dai_drv->dobj.type); + return -EINVAL; + } + + lockdep_assert_held(&client_mutex); + dai = soc_add_dai(component, dai_drv, false); + if (!dai) + return -ENOMEM; + + /* Create the DAI widgets here. After adding DAIs, topology may + * also add routes that need these widgets as source or sink. + */ + ret = snd_soc_dapm_new_dai_widgets(dapm, dai); + if (ret != 0) { + dev_err(component->dev, + "Failed to create DAI widgets %d\n", ret); + } + + return ret; +} +EXPORT_SYMBOL_GPL(snd_soc_register_dai); + +static void snd_soc_component_seq_notifier(struct snd_soc_dapm_context *dapm, + enum snd_soc_dapm_type type, int subseq) +{ + struct snd_soc_component *component = dapm->component; + + component->driver->seq_notifier(component, type, subseq); +} + +static int snd_soc_component_stream_event(struct snd_soc_dapm_context *dapm, + int event) +{ + struct snd_soc_component *component = dapm->component; + + return component->driver->stream_event(component, event); +} + +static int snd_soc_component_set_bias_level(struct snd_soc_dapm_context *dapm, + enum snd_soc_bias_level level) +{ + struct snd_soc_component *component = dapm->component; + + return component->driver->set_bias_level(component, level); +} + +static int snd_soc_component_initialize(struct snd_soc_component *component, + const struct snd_soc_component_driver *driver, struct device *dev) +{ + struct snd_soc_dapm_context *dapm; + + 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; + + dapm = snd_soc_component_get_dapm(component); + dapm->dev = dev; + dapm->component = component; + dapm->bias_level = SND_SOC_BIAS_OFF; + dapm->idle_bias_off = !driver->idle_bias_on; + dapm->suspend_bias_off = driver->suspend_bias_off; + if (driver->seq_notifier) + dapm->seq_notifier = snd_soc_component_seq_notifier; + if (driver->stream_event) + dapm->stream_event = snd_soc_component_stream_event; + if (driver->set_bias_level) + dapm->set_bias_level = snd_soc_component_set_bias_level; + + INIT_LIST_HEAD(&component->dai_list); + mutex_init(&component->io_mutex); + + return 0; +} + +static void snd_soc_component_setup_regmap(struct snd_soc_component *component) +{ + int val_bytes = regmap_get_val_bytes(component->regmap); + + /* Errors are legitimate for non-integer byte multiples */ + if (val_bytes > 0) + component->val_bytes = val_bytes; +} + +#ifdef CONFIG_REGMAP + +/** + * snd_soc_component_init_regmap() - Initialize regmap instance for the component + * @component: The component for which to initialize the regmap instance + * @regmap: The regmap instance that should be used by the component + * + * This function allows deferred assignment of the regmap instance that is + * associated with the component. Only use this if the regmap instance is not + * yet ready when the component is registered. The function must also be called + * before the first IO attempt of the component. + */ +void snd_soc_component_init_regmap(struct snd_soc_component *component, + struct regmap *regmap) +{ + component->regmap = regmap; + snd_soc_component_setup_regmap(component); +} +EXPORT_SYMBOL_GPL(snd_soc_component_init_regmap); + +/** + * snd_soc_component_exit_regmap() - De-initialize regmap instance for the component + * @component: The component for which to de-initialize the regmap instance + * + * Calls regmap_exit() on the regmap instance associated to the component and + * removes the regmap instance from the component. + * + * This function should only be used if snd_soc_component_init_regmap() was used + * to initialize the regmap instance. + */ +void snd_soc_component_exit_regmap(struct snd_soc_component *component) +{ + regmap_exit(component->regmap); + component->regmap = NULL; +} +EXPORT_SYMBOL_GPL(snd_soc_component_exit_regmap); + +#endif + +static void snd_soc_component_add(struct snd_soc_component *component) +{ + mutex_lock(&client_mutex); + + 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); + } + + list_add(&component->list, &component_list); + INIT_LIST_HEAD(&component->dobj_list); + + mutex_unlock(&client_mutex); +} + +static void snd_soc_component_cleanup(struct snd_soc_component *component) +{ + snd_soc_unregister_dais(component); + kfree(component->name); +} + +static void snd_soc_component_del_unlocked(struct snd_soc_component *component) +{ + struct snd_soc_card *card = component->card; + + if (card) + snd_soc_unregister_card(card); + + list_del(&component->list); +} + +#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]; +} + +int snd_soc_add_component(struct device *dev, + struct snd_soc_component *component, + const struct snd_soc_component_driver *component_driver, + struct snd_soc_dai_driver *dai_drv, + int num_dai) +{ + int ret; + int i; + + ret = snd_soc_component_initialize(component, component_driver, dev); + if (ret) + goto err_free; + + if (component_driver->endianness) { + for (i = 0; i < num_dai; i++) { + convert_endianness_formats(&dai_drv[i].playback); + convert_endianness_formats(&dai_drv[i].capture); + } + } + + ret = snd_soc_register_dais(component, dai_drv, num_dai); + if (ret < 0) { + dev_err(dev, "ASoC: Failed to register DAIs: %d\n", ret); + goto err_cleanup; + } + + snd_soc_component_add(component); + + return 0; + +err_cleanup: + snd_soc_component_cleanup(component); +err_free: + return ret; +} +EXPORT_SYMBOL_GPL(snd_soc_add_component); + +int snd_soc_register_component(struct device *dev, + const struct snd_soc_component_driver *component_driver, + struct snd_soc_dai_driver *dai_drv, + int num_dai) +{ + struct snd_soc_component *component; + + component = devm_kzalloc(dev, sizeof(*component), GFP_KERNEL); + if (!component) + return -ENOMEM; + + return snd_soc_add_component(dev, component, component_driver, + dai_drv, num_dai); +} +EXPORT_SYMBOL_GPL(snd_soc_register_component); + +/** + * snd_soc_unregister_component - Unregister all related component + * from the ASoC core + * + * @dev: The device to unregister + */ +static int __snd_soc_unregister_component(struct device *dev) +{ + struct snd_soc_component *component; + int found = 0; + + mutex_lock(&client_mutex); + list_for_each_entry(component, &component_list, list) { + if (dev != component->dev) + continue; + + snd_soc_tplg_component_remove(component, SND_SOC_TPLG_INDEX_ALL); + snd_soc_component_del_unlocked(component); + found = 1; + break; + } + mutex_unlock(&client_mutex); + + if (found) { + snd_soc_component_cleanup(component); + } + + return found; +} + +void snd_soc_unregister_component(struct device *dev) +{ + while (__snd_soc_unregister_component(dev)); +} +EXPORT_SYMBOL_GPL(snd_soc_unregister_component); + +struct snd_soc_component *snd_soc_lookup_component(struct device *dev, + const char *driver_name) +{ + struct snd_soc_component *component; + struct snd_soc_component *ret; + + ret = NULL; + mutex_lock(&client_mutex); + list_for_each_entry(component, &component_list, list) { + if (dev != component->dev) + continue; + + if (driver_name && + (driver_name != component->driver->name) && + (strcmp(component->driver->name, driver_name) != 0)) + continue; + + ret = component; + break; + } + mutex_unlock(&client_mutex); + + return ret; +} +EXPORT_SYMBOL_GPL(snd_soc_lookup_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_audio_prefix(struct snd_soc_card *card, + struct snd_soc_codec_conf *codec_conf, + struct device_node *of_node, + const char *propname) +{ + struct device_node *np = card->dev->of_node; + const char *str; + int ret; + + ret = of_property_read_string(np, propname, &str); + if (ret < 0) { + /* no prefix is not error */ + return; + } + + codec_conf->of_node = of_node; + codec_conf->name_prefix = str; +} +EXPORT_SYMBOL_GPL(snd_soc_of_parse_audio_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); + +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 *pos; + struct device_node *node; + int ret; + + node = of_graph_get_port_parent(ep); + + /* + * 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); + list_for_each_entry(pos, &component_list, list) { + struct device_node *component_of_node = pos->dev->of_node; + + if (!component_of_node && pos->dev->parent) + component_of_node = pos->dev->parent->of_node; + + if (component_of_node != node) + continue; + + if (pos->driver->of_xlate_dai_id) + ret = pos->driver->of_xlate_dai_id(pos, ep); + + break; + } + mutex_unlock(&client_mutex); + + of_node_put(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); + list_for_each_entry(pos, &component_list, list) { + component_of_node = pos->dev->of_node; + if (!component_of_node && pos->dev->parent) + component_of_node = pos->dev->parent->of_node; + + if (component_of_node != args->np || !pos->num_dai) + continue; + + if (pos->driver->of_xlate_dai_name) { + ret = pos->driver->of_xlate_dai_name(pos, + args, + dai_name); + } else { + 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 */ + list_for_each_entry(dai, &pos->dai_list, list) { + if (id == 0) + break; + id--; + } + + *dai_name = dai->driver->name; + if (!*dai_name) + *dai_name = pos->name; + } + + 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 = dai_link->codecs; + int index; + + for (index = 0; index < dai_link->num_codecs; 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 (index = 0, component = dai_link->codecs; + index < dai_link->num_codecs; + 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) +{ + snd_soc_debugfs_init(); + snd_soc_util_init(); + + return platform_driver_register(&soc_driver); +} +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"); |