--- /dev/null
+/*
+ * 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>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ *
+ * 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 <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/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(platform_list);
+static LIST_HEAD(codec_list);
+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)");
+
+/* returns the minimum number of bytes needed to represent
+ * a particular given value */
+static int min_bytes_needed(unsigned long val)
+{
+ int c = 0;
+ int i;
+
+ for (i = (sizeof val * 8) - 1; i >= 0; --i, ++c)
+ if (val & (1UL << i))
+ break;
+ c = (sizeof val * 8) - c;
+ if (!c || (c % 8))
+ c = (c + 8) / 8;
+ else
+ c /= 8;
+ return c;
+}
+
+/* fill buf which is 'len' bytes with a formatted
+ * string of the form 'reg: value\n' */
+static int format_register_str(struct snd_soc_codec *codec,
+ unsigned int reg, char *buf, size_t len)
+{
+ int wordsize = min_bytes_needed(codec->driver->reg_cache_size) * 2;
+ int regsize = codec->driver->reg_word_size * 2;
+ int ret;
+ char tmpbuf[len + 1];
+ char regbuf[regsize + 1];
+
+ /* since tmpbuf is allocated on the stack, warn the callers if they
+ * try to abuse this function */
+ WARN_ON(len > 63);
+
+ /* +2 for ': ' and + 1 for '\n' */
+ if (wordsize + regsize + 2 + 1 != len)
+ return -EINVAL;
+
+ ret = snd_soc_read(codec, reg);
+ if (ret < 0) {
+ memset(regbuf, 'X', regsize);
+ regbuf[regsize] = '\0';
+ } else {
+ snprintf(regbuf, regsize + 1, "%.*x", regsize, ret);
+ }
+
+ /* prepare the buffer */
+ snprintf(tmpbuf, len + 1, "%.*x: %s\n", wordsize, reg, regbuf);
+ /* copy it back to the caller without the '\0' */
+ memcpy(buf, tmpbuf, len);
+
+ return 0;
+}
+
+/* codec register dump */
+static ssize_t soc_codec_reg_show(struct snd_soc_codec *codec, char *buf,
+ size_t count, loff_t pos)
+{
+ int i, step = 1;
+ int wordsize, regsize;
+ int len;
+ size_t total = 0;
+ loff_t p = 0;
+
+ wordsize = min_bytes_needed(codec->driver->reg_cache_size) * 2;
+ regsize = codec->driver->reg_word_size * 2;
+
+ len = wordsize + regsize + 2 + 1;
+
+ if (!codec->driver->reg_cache_size)
+ return 0;
+
+ if (codec->driver->reg_cache_step)
+ step = codec->driver->reg_cache_step;
+
+ for (i = 0; i < codec->driver->reg_cache_size; i += step) {
+ /* only support larger than PAGE_SIZE bytes debugfs
+ * entries for the default case */
+ if (p >= pos) {
+ if (total + len >= count - 1)
+ break;
+ format_register_str(codec, i, buf + total, len);
+ total += len;
+ }
+ p += len;
+ }
+
+ total = min(total, count - 1);
+
+ return total;
+}
+
+static ssize_t codec_reg_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev);
+
+ return soc_codec_reg_show(rtd->codec, buf, PAGE_SIZE, 0);
+}
+
+static DEVICE_ATTR(codec_reg, 0444, codec_reg_show, NULL);
+
+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_codec_reg.attr,
+ &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->codec ? 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_roup = {
+ .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_roup,
+ NULL
+};
+
+#ifdef CONFIG_DEBUG_FS
+static ssize_t codec_reg_read_file(struct file *file, char __user *user_buf,
+ size_t count, loff_t *ppos)
+{
+ ssize_t ret;
+ struct snd_soc_codec *codec = file->private_data;
+ char *buf;
+
+ if (*ppos < 0 || !count)
+ return -EINVAL;
+
+ buf = kmalloc(count, GFP_KERNEL);
+ if (!buf)
+ return -ENOMEM;
+
+ ret = soc_codec_reg_show(codec, buf, count, *ppos);
+ if (ret >= 0) {
+ if (copy_to_user(user_buf, buf, ret)) {
+ kfree(buf);
+ return -EFAULT;
+ }
+ *ppos += ret;
+ }
+
+ kfree(buf);
+ return ret;
+}
+
+static ssize_t codec_reg_write_file(struct file *file,
+ const char __user *user_buf, size_t count, loff_t *ppos)
+{
+ char buf[32];
+ size_t buf_size;
+ char *start = buf;
+ unsigned long reg, value;
+ struct snd_soc_codec *codec = file->private_data;
+ int ret;
+
+ buf_size = min(count, (sizeof(buf)-1));
+ if (copy_from_user(buf, user_buf, buf_size))
+ return -EFAULT;
+ buf[buf_size] = 0;
+
+ while (*start == ' ')
+ start++;
+ reg = simple_strtoul(start, &start, 16);
+ while (*start == ' ')
+ start++;
+ ret = kstrtoul(start, 16, &value);
+ if (ret)
+ return ret;
+
+ /* Userspace has been fiddling around behind the kernel's back */
+ add_taint(TAINT_USER, LOCKDEP_NOW_UNRELIABLE);
+
+ snd_soc_write(codec, reg, value);
+ return buf_size;
+}
+
+static const struct file_operations codec_reg_fops = {
+ .open = simple_open,
+ .read = codec_reg_read_file,
+ .write = codec_reg_write_file,
+ .llseek = default_llseek,
+};
+
+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);
+
+ if (component->init_debugfs)
+ component->init_debugfs(component);
+}
+
+static void soc_cleanup_component_debugfs(struct snd_soc_component *component)
+{
+ debugfs_remove_recursive(component->debugfs_root);
+}
+
+static void soc_init_codec_debugfs(struct snd_soc_component *component)
+{
+ struct snd_soc_codec *codec = snd_soc_component_to_codec(component);
+
+ codec->debugfs_reg = debugfs_create_file("codec_reg", 0644,
+ codec->component.debugfs_root,
+ codec, &codec_reg_fops);
+ if (!codec->debugfs_reg)
+ dev_warn(codec->dev,
+ "ASoC: Failed to create codec register debugfs file\n");
+}
+
+static ssize_t codec_list_read_file(struct file *file, char __user *user_buf,
+ size_t count, loff_t *ppos)
+{
+ char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
+ ssize_t len, ret = 0;
+ struct snd_soc_codec *codec;
+
+ if (!buf)
+ return -ENOMEM;
+
+ mutex_lock(&client_mutex);
+
+ list_for_each_entry(codec, &codec_list, list) {
+ len = snprintf(buf + ret, PAGE_SIZE - ret, "%s\n",
+ codec->component.name);
+ if (len >= 0)
+ ret += len;
+ if (ret > PAGE_SIZE) {
+ ret = PAGE_SIZE;
+ break;
+ }
+ }
+
+ mutex_unlock(&client_mutex);
+
+ if (ret >= 0)
+ ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
+
+ kfree(buf);
+
+ return ret;
+}
+
+static const struct file_operations codec_list_fops = {
+ .read = codec_list_read_file,
+ .llseek = default_llseek,/* read accesses f_pos */
+};
+
+static ssize_t dai_list_read_file(struct file *file, char __user *user_buf,
+ size_t count, loff_t *ppos)
+{
+ char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
+ ssize_t len, ret = 0;
+ struct snd_soc_component *component;
+ struct snd_soc_dai *dai;
+
+ if (!buf)
+ return -ENOMEM;
+
+ mutex_lock(&client_mutex);
+
+ list_for_each_entry(component, &component_list, list) {
+ list_for_each_entry(dai, &component->dai_list, list) {
+ len = snprintf(buf + ret, PAGE_SIZE - ret, "%s\n",
+ dai->name);
+ if (len >= 0)
+ ret += len;
+ if (ret > PAGE_SIZE) {
+ ret = PAGE_SIZE;
+ break;
+ }
+ }
+ }
+
+ mutex_unlock(&client_mutex);
+
+ ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
+
+ kfree(buf);
+
+ return ret;
+}
+
+static const struct file_operations dai_list_fops = {
+ .read = dai_list_read_file,
+ .llseek = default_llseek,/* read accesses f_pos */
+};
+
+static ssize_t platform_list_read_file(struct file *file,
+ char __user *user_buf,
+ size_t count, loff_t *ppos)
+{
+ char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
+ ssize_t len, ret = 0;
+ struct snd_soc_platform *platform;
+
+ if (!buf)
+ return -ENOMEM;
+
+ mutex_lock(&client_mutex);
+
+ list_for_each_entry(platform, &platform_list, list) {
+ len = snprintf(buf + ret, PAGE_SIZE - ret, "%s\n",
+ platform->component.name);
+ if (len >= 0)
+ ret += len;
+ if (ret > PAGE_SIZE) {
+ ret = PAGE_SIZE;
+ break;
+ }
+ }
+
+ mutex_unlock(&client_mutex);
+
+ ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
+
+ kfree(buf);
+
+ return ret;
+}
+
+static const struct file_operations platform_list_fops = {
+ .read = platform_list_read_file,
+ .llseek = default_llseek,/* read accesses f_pos */
+};
+
+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(snd_soc_debugfs_root) || !snd_soc_debugfs_root) {
+ pr_warn("ASoC: Failed to create debugfs directory\n");
+ snd_soc_debugfs_root = NULL;
+ return;
+ }
+
+ if (!debugfs_create_file("codecs", 0444, snd_soc_debugfs_root, NULL,
+ &codec_list_fops))
+ pr_warn("ASoC: Failed to create CODEC list debugfs file\n");
+
+ 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("platforms", 0444, snd_soc_debugfs_root, NULL,
+ &platform_list_fops))
+ pr_warn("ASoC: Failed to create platform list debugfs file\n");
+}
+
+static void snd_soc_debugfs_exit(void)
+{
+ debugfs_remove_recursive(snd_soc_debugfs_root);
+}
+
+#else
+
+#define soc_init_codec_debugfs NULL
+
+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
+
+struct snd_pcm_substream *snd_soc_get_dai_substream(struct snd_soc_card *card,
+ const char *dai_link, int stream)
+{
+ int i;
+
+ for (i = 0; i < card->num_links; i++) {
+ if (card->rtd[i].dai_link->no_pcm &&
+ !strcmp(card->rtd[i].dai_link->name, dai_link))
+ return card->rtd[i].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);
+
+struct snd_soc_pcm_runtime *snd_soc_get_pcm_runtime(struct snd_soc_card *card,
+ const char *dai_link)
+{
+ int i;
+
+ for (i = 0; i < card->num_links; i++) {
+ if (!strcmp(card->rtd[i].dai_link->name, dai_link))
+ return &card->rtd[i];
+ }
+ 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_codec *codec;
+ int i, j;
+
+ /* 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_lock(card->snd_card);
+ snd_power_wait(card->snd_card, SNDRV_CTL_POWER_D0);
+ snd_power_unlock(card->snd_card);
+
+ /* we're going to block userspace touching us until resume completes */
+ snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D3hot);
+
+ /* mute any active DACs */
+ for (i = 0; i < card->num_rtd; i++) {
+
+ if (card->rtd[i].dai_link->ignore_suspend)
+ continue;
+
+ for (j = 0; j < card->rtd[i].num_codecs; j++) {
+ struct snd_soc_dai *dai = card->rtd[i].codec_dais[j];
+ 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 */
+ for (i = 0; i < card->num_rtd; i++) {
+ if (card->rtd[i].dai_link->ignore_suspend)
+ continue;
+
+ snd_pcm_suspend_all(card->rtd[i].pcm);
+ }
+
+ if (card->suspend_pre)
+ card->suspend_pre(card);
+
+ for (i = 0; i < card->num_rtd; i++) {
+ struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
+
+ if (card->rtd[i].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 */
+ for (i = 0; i < card->num_rtd; i++)
+ flush_delayed_work(&card->rtd[i].delayed_work);
+
+ for (i = 0; i < card->num_rtd; i++) {
+
+ if (card->rtd[i].dai_link->ignore_suspend)
+ continue;
+
+ snd_soc_dapm_stream_event(&card->rtd[i],
+ SNDRV_PCM_STREAM_PLAYBACK,
+ SND_SOC_DAPM_STREAM_SUSPEND);
+
+ snd_soc_dapm_stream_event(&card->rtd[i],
+ 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 CODECs */
+ list_for_each_entry(codec, &card->codec_dev_list, card_list) {
+ /* If there are paths active then the CODEC will be held with
+ * bias _ON and should not be suspended. */
+ if (!codec->suspended) {
+ switch (codec->dapm.bias_level) {
+ case SND_SOC_BIAS_STANDBY:
+ /*
+ * If the CODEC is capable of idle
+ * bias off then being in STANDBY
+ * means it's doing something,
+ * otherwise fall through.
+ */
+ if (codec->dapm.idle_bias_off) {
+ dev_dbg(codec->dev,
+ "ASoC: idle_bias_off CODEC on over suspend\n");
+ break;
+ }
+
+ case SND_SOC_BIAS_OFF:
+ if (codec->driver->suspend)
+ codec->driver->suspend(codec);
+ codec->suspended = 1;
+ if (codec->component.regmap)
+ regcache_mark_dirty(codec->component.regmap);
+ /* deactivate pins to sleep state */
+ pinctrl_pm_select_sleep_state(codec->dev);
+ break;
+ default:
+ dev_dbg(codec->dev,
+ "ASoC: CODEC is on over suspend\n");
+ break;
+ }
+ }
+ }
+
+ for (i = 0; i < card->num_rtd; i++) {
+ struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
+
+ if (card->rtd[i].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_codec *codec;
+ int i, j;
+
+ /* our power state is still SNDRV_CTL_POWER_D3hot from suspend time,
+ * so userspace apps are blocked from touching us
+ */
+
+ dev_dbg(card->dev, "ASoC: starting resume work\n");
+
+ /* Bring us up into D2 so that DAPM starts enabling things */
+ snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D2);
+
+ if (card->resume_pre)
+ card->resume_pre(card);
+
+ /* resume control bus DAIs */
+ for (i = 0; i < card->num_rtd; i++) {
+ struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
+
+ if (card->rtd[i].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(codec, &card->codec_dev_list, card_list) {
+ /* If the CODEC was idle over suspend then it will have been
+ * left with bias OFF or STANDBY and suspended so we must now
+ * resume. Otherwise the suspend was suppressed.
+ */
+ if (codec->suspended) {
+ switch (codec->dapm.bias_level) {
+ case SND_SOC_BIAS_STANDBY:
+ case SND_SOC_BIAS_OFF:
+ if (codec->driver->resume)
+ codec->driver->resume(codec);
+ codec->suspended = 0;
+ break;
+ default:
+ dev_dbg(codec->dev,
+ "ASoC: CODEC was on over suspend\n");
+ break;
+ }
+ }
+ }
+
+ for (i = 0; i < card->num_rtd; i++) {
+
+ if (card->rtd[i].dai_link->ignore_suspend)
+ continue;
+
+ snd_soc_dapm_stream_event(&card->rtd[i],
+ SNDRV_PCM_STREAM_PLAYBACK,
+ SND_SOC_DAPM_STREAM_RESUME);
+
+ snd_soc_dapm_stream_event(&card->rtd[i],
+ SNDRV_PCM_STREAM_CAPTURE,
+ SND_SOC_DAPM_STREAM_RESUME);
+ }
+
+ /* unmute any active DACs */
+ for (i = 0; i < card->num_rtd; i++) {
+
+ if (card->rtd[i].dai_link->ignore_suspend)
+ continue;
+
+ for (j = 0; j < card->rtd[i].num_codecs; j++) {
+ struct snd_soc_dai *dai = card->rtd[i].codec_dais[j];
+ struct snd_soc_dai_driver *drv = dai->driver;
+
+ if (drv->ops->digital_mute && dai->playback_active)
+ drv->ops->digital_mute(dai, 0);
+ }
+ }
+
+ for (i = 0; i < card->num_rtd; i++) {
+ struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
+
+ if (card->rtd[i].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");
+
+ /* userspace can access us now we are back as we were before */
+ snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D0);
+
+ /* Recheck all endpoints too, their state is affected by suspend */
+ dapm_mark_endpoints_dirty(card);
+ snd_soc_dapm_sync(&card->dapm);
+}
+
+/* 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;
+ int i;
+
+ /* If the card is not initialized yet there is nothing to do */
+ if (!card->instantiated)
+ return 0;
+
+ /* activate pins from sleep state */
+ for (i = 0; i < card->num_rtd; i++) {
+ struct snd_soc_pcm_runtime *rtd = &card->rtd[i];
+ 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.
+ */
+ for (i = 0; i < card->num_rtd; i++) {
+ struct snd_soc_dai *cpu_dai = card->rtd[i].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;
+}
+
+static struct snd_soc_dai *snd_soc_find_dai(
+ const struct snd_soc_dai_link_component *dlc)
+{
+ struct snd_soc_component *component;
+ struct snd_soc_dai *dai;
+
+ lockdep_assert_held(&client_mutex);
+
+ /* Find CPU DAI from registered DAIs*/
+ list_for_each_entry(component, &component_list, list) {
+ if (dlc->of_node && component->dev->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))
+ continue;
+
+ return dai;
+ }
+ }
+
+ return NULL;
+}
+
+static int soc_bind_dai_link(struct snd_soc_card *card, int num)
+{
+ struct snd_soc_dai_link *dai_link = &card->dai_link[num];
+ struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
+ struct snd_soc_dai_link_component *codecs = dai_link->codecs;
+ struct snd_soc_dai_link_component cpu_dai_component;
+ struct snd_soc_dai **codec_dais = rtd->codec_dais;
+ struct snd_soc_platform *platform;
+ const char *platform_name;
+ int i;
+
+ dev_dbg(card->dev, "ASoC: binding %s at idx %d\n", dai_link->name, num);
+
+ 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_err(card->dev, "ASoC: CPU DAI %s not registered\n",
+ dai_link->cpu_dai_name);
+ return -EPROBE_DEFER;
+ }
+
+ rtd->num_codecs = dai_link->num_codecs;
+
+ /* Find CODEC from registered CODECs */
+ 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);
+ return -EPROBE_DEFER;
+ }
+ }
+
+ /* Single codec links expect codec and codec_dai in runtime data */
+ rtd->codec_dai = codec_dais[0];
+ rtd->codec = rtd->codec_dai->codec;
+
+ /* 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(platform, &platform_list, list) {
+ if (dai_link->platform_of_node) {
+ if (platform->dev->of_node !=
+ dai_link->platform_of_node)
+ continue;
+ } else {
+ if (strcmp(platform->component.name, platform_name))
+ continue;
+ }
+
+ rtd->platform = platform;
+ }
+ if (!rtd->platform) {
+ dev_err(card->dev, "ASoC: platform %s not registered\n",
+ dai_link->platform_name);
+ return -EPROBE_DEFER;
+ }
+
+ card->num_rtd++;
+
+ return 0;
+}
+
+static void soc_remove_component(struct snd_soc_component *component)
+{
+ if (!component->probed)
+ return;
+
+ /* This is a HACK and will be removed soon */
+ if (component->codec)
+ list_del(&component->codec->card_list);
+
+ if (component->remove)
+ component->remove(component);
+
+ snd_soc_dapm_free(snd_soc_component_get_dapm(component));
+
+ soc_cleanup_component_debugfs(component);
+ component->probed = 0;
+ 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, int num, int order)
+{
+ struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
+ 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, int num,
+ int order)
+{
+ struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
+ struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
+ struct snd_soc_platform *platform = rtd->platform;
+ struct snd_soc_component *component;
+ int i;
+
+ /* remove the platform */
+ if (platform && platform->component.driver->remove_order == order)
+ soc_remove_component(&platform->component);
+
+ /* remove the CODEC-side CODEC */
+ for (i = 0; i < rtd->num_codecs; i++) {
+ component = rtd->codec_dais[i]->component;
+ if (component->driver->remove_order == order)
+ soc_remove_component(component);
+ }
+
+ /* remove any CPU-side CODEC */
+ if (cpu_dai) {
+ if (cpu_dai->component->driver->remove_order == order)
+ soc_remove_component(cpu_dai->component);
+ }
+}
+
+static void soc_remove_dai_links(struct snd_soc_card *card)
+{
+ int dai, order;
+
+ for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST;
+ order++) {
+ for (dai = 0; dai < card->num_rtd; dai++)
+ soc_remove_link_dais(card, dai, order);
+ }
+
+ for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST;
+ order++) {
+ for (dai = 0; dai < card->num_rtd; dai++)
+ soc_remove_link_components(card, dai, order);
+ }
+
+ card->num_rtd = 0;
+}
+
+static void soc_set_name_prefix(struct snd_soc_card *card,
+ struct snd_soc_component *component)
+{
+ int i;
+
+ if (card->codec_conf == NULL)
+ return;
+
+ for (i = 0; i < card->num_configs; i++) {
+ struct snd_soc_codec_conf *map = &card->codec_conf[i];
+ if (map->of_node && component->dev->of_node != map->of_node)
+ continue;
+ if (map->dev_name && strcmp(component->name, map->dev_name))
+ continue;
+ component->name_prefix = map->name_prefix;
+ break;
+ }
+}
+
+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 (component->probed)
+ return 0;
+
+ component->card = card;
+ dapm->card = card;
+ soc_set_name_prefix(card, component);
+
+ if (!try_module_get(component->dev->driver->owner))
+ return -ENODEV;
+
+ soc_init_component_debugfs(component);
+
+ if (component->dapm_widgets) {
+ ret = snd_soc_dapm_new_controls(dapm, component->dapm_widgets,
+ component->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->probe) {
+ ret = component->probe(component);
+ if (ret < 0) {
+ dev_err(component->dev,
+ "ASoC: failed to probe component %d\n", ret);
+ goto err_probe;
+ }
+
+ WARN(dapm->idle_bias_off &&
+ dapm->bias_level != SND_SOC_BIAS_OFF,
+ "codec %s can not start from non-off bias with idle_bias_off==1\n",
+ component->name);
+ }
+
+ if (component->controls)
+ snd_soc_add_component_controls(component, component->controls,
+ component->num_controls);
+ if (component->dapm_routes)
+ snd_soc_dapm_add_routes(dapm, component->dapm_routes,
+ component->num_dapm_routes);
+
+ component->probed = 1;
+ list_add(&dapm->list, &card->dapm_list);
+
+ /* This is a HACK and will be removed soon */
+ if (component->codec)
+ list_add(&component->codec->card_list, &card->codec_dev_list);
+
+ return 0;
+
+err_probe:
+ soc_cleanup_component_debugfs(component);
+ 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, int num,
+ int order)
+{
+ struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
+ struct snd_soc_platform *platform = rtd->platform;
+ struct snd_soc_component *component;
+ int i, ret;
+
+ /* probe the CPU-side component, if it is a CODEC */
+ component = rtd->cpu_dai->component;
+ if (component->driver->probe_order == order) {
+ ret = soc_probe_component(card, component);
+ if (ret < 0)
+ return ret;
+ }
+
+ /* probe the CODEC-side components */
+ for (i = 0; i < rtd->num_codecs; i++) {
+ component = rtd->codec_dais[i]->component;
+ if (component->driver->probe_order == order) {
+ ret = soc_probe_component(card, component);
+ if (ret < 0)
+ return ret;
+ }
+ }
+
+ /* probe the platform */
+ if (platform->component.driver->probe_order == order) {
+ ret = soc_probe_component(card, &platform->component);
+ if (ret < 0)
+ return ret;
+ }
+
+ return 0;
+}
+
+static int soc_probe_dai(struct snd_soc_dai *dai, int order)
+{
+ int ret;
+
+ if (!dai->probed && dai->driver->probe_order == order) {
+ if (dai->driver->probe) {
+ 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_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 *play_w, *capture_w;
+ int ret;
+
+ if (rtd->num_codecs > 1)
+ dev_warn(card->dev, "ASoC: Multiple codecs not supported yet\n");
+
+ /* link the DAI widgets */
+ play_w = codec_dai->playback_widget;
+ capture_w = cpu_dai->capture_widget;
+ if (play_w && capture_w) {
+ ret = snd_soc_dapm_new_pcm(card, dai_link->params,
+ dai_link->num_params, capture_w,
+ play_w);
+ if (ret != 0) {
+ dev_err(card->dev, "ASoC: Can't link %s to %s: %d\n",
+ play_w->name, capture_w->name, ret);
+ return ret;
+ }
+ }
+
+ play_w = cpu_dai->playback_widget;
+ capture_w = codec_dai->capture_widget;
+ if (play_w && capture_w) {
+ ret = snd_soc_dapm_new_pcm(card, dai_link->params,
+ dai_link->num_params, capture_w,
+ play_w);
+ if (ret != 0) {
+ dev_err(card->dev, "ASoC: Can't link %s to %s: %d\n",
+ play_w->name, capture_w->name, ret);
+ return ret;
+ }
+ }
+
+ return 0;
+}
+
+static int soc_probe_link_dais(struct snd_soc_card *card, int num, int order)
+{
+ struct snd_soc_dai_link *dai_link = &card->dai_link[num];
+ struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
+ struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
+ int i, ret;
+
+ dev_dbg(card->dev, "ASoC: probe %s dai link %d late %d\n",
+ card->name, 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
+
+ if (cpu_dai->driver->compress_dai) {
+ /*create compress_device"*/
+ ret = soc_new_compress(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;
+ }
+ } 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_pcm_runtime *rtd = &card->rtd_aux[num];
+ struct snd_soc_aux_dev *aux_dev = &card->aux_dev[num];
+ const char *name = aux_dev->codec_name;
+
+ rtd->component = soc_find_component(aux_dev->codec_of_node, name);
+ if (!rtd->component) {
+ if (aux_dev->codec_of_node)
+ name = of_node_full_name(aux_dev->codec_of_node);
+
+ dev_err(card->dev, "ASoC: %s not registered\n", name);
+ return -EPROBE_DEFER;
+ }
+
+ /*
+ * Some places still reference rtd->codec, so we have to keep that
+ * initialized if the component is a CODEC. Once all those references
+ * have been removed, this code can be removed as well.
+ */
+ rtd->codec = rtd->component->codec;
+
+ return 0;
+}
+
+static int soc_probe_aux_dev(struct snd_soc_card *card, int num)
+{
+ struct snd_soc_pcm_runtime *rtd = &card->rtd_aux[num];
+ struct snd_soc_aux_dev *aux_dev = &card->aux_dev[num];
+ int ret;
+
+ ret = soc_probe_component(card, rtd->component);
+ if (ret < 0)
+ return ret;
+
+ /* do machine specific initialization */
+ if (aux_dev->init) {
+ ret = aux_dev->init(rtd->component);
+ if (ret < 0) {
+ dev_err(card->dev, "ASoC: failed to init %s: %d\n",
+ aux_dev->name, ret);
+ return ret;
+ }
+ }
+
+ return soc_post_component_init(rtd, aux_dev->name);
+}
+
+static void soc_remove_aux_dev(struct snd_soc_card *card, int num)
+{
+ struct snd_soc_pcm_runtime *rtd = &card->rtd_aux[num];
+ struct snd_soc_component *component = rtd->component;
+
+ /* unregister the rtd device */
+ if (rtd->dev_registered) {
+ device_unregister(rtd->dev);
+ rtd->dev_registered = 0;
+ }
+
+ if (component && component->probed)
+ soc_remove_component(component);
+}
+
+static int snd_soc_init_codec_cache(struct snd_soc_codec *codec)
+{
+ int ret;
+
+ if (codec->cache_init)
+ return 0;
+
+ ret = snd_soc_cache_init(codec);
+ if (ret < 0) {
+ dev_err(codec->dev,
+ "ASoC: Failed to set cache compression type: %d\n",
+ ret);
+ return ret;
+ }
+ codec->cache_init = 1;
+ return 0;
+}
+
+/**
+ * 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 */
+ if (cpu_dai->codec) {
+ 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);
+
+static int snd_soc_instantiate_card(struct snd_soc_card *card)
+{
+ struct snd_soc_codec *codec;
+ int ret, i, order;
+
+ mutex_lock(&client_mutex);
+ mutex_lock_nested(&card->mutex, SND_SOC_CARD_CLASS_INIT);
+
+ /* bind DAIs */
+ for (i = 0; i < card->num_links; i++) {
+ ret = soc_bind_dai_link(card, 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;
+ }
+
+ /* initialize the register cache for each available codec */
+ list_for_each_entry(codec, &codec_list, list) {
+ if (codec->cache_init)
+ continue;
+ ret = snd_soc_init_codec_cache(codec);
+ if (ret < 0)
+ goto base_error;
+ }
+
+ /* 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++) {
+ for (i = 0; i < card->num_links; i++) {
+ ret = soc_probe_link_components(card, i, order);
+ if (ret < 0) {
+ dev_err(card->dev,
+ "ASoC: failed to instantiate card %d\n",
+ 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++) {
+ for (i = 0; i < card->num_links; i++) {
+ ret = soc_probe_link_dais(card, i, order);
+ if (ret < 0) {
+ dev_err(card->dev,
+ "ASoC: failed to instantiate card %d\n",
+ ret);
+ goto probe_dai_err;
+ }
+ }
+ }
+
+ for (i = 0; i < card->num_aux_devs; i++) {
+ ret = soc_probe_aux_dev(card, i);
+ if (ret < 0) {
+ dev_err(card->dev,
+ "ASoC: failed to add auxiliary devices %d\n",
+ ret);
+ goto probe_aux_dev_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);
+
+ 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;
+ snd_soc_dapm_sync(&card->dapm);
+ mutex_unlock(&card->mutex);
+ mutex_unlock(&client_mutex);
+
+ return 0;
+
+probe_aux_dev_err:
+ for (i = 0; i < card->num_aux_devs; i++)
+ soc_remove_aux_dev(card, i);
+
+probe_dai_err:
+ soc_remove_dai_links(card);
+
+card_probe_error:
+ if (card->remove)
+ card->remove(card);
+
+ soc_cleanup_card_debugfs(card);
+ snd_card_free(card->snd_card);
+
+base_error:
+ 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)
+{
+ int i;
+
+ /* make sure any delayed work runs */
+ for (i = 0; i < card->num_rtd; i++) {
+ struct snd_soc_pcm_runtime *rtd = &card->rtd[i];
+ flush_delayed_work(&rtd->delayed_work);
+ }
+
+ /* remove auxiliary devices */
+ for (i = 0; i < card->num_aux_devs; i++)
+ soc_remove_aux_dev(card, i);
+
+ /* remove and free each DAI */
+ soc_remove_dai_links(card);
+
+ soc_cleanup_card_debugfs(card);
+
+ /* remove the card */
+ if (card->remove)
+ card->remove(card);
+
+ snd_soc_dapm_free(&card->dapm);
+
+ snd_card_free(card->snd_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);
+ int i;
+
+ 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. */
+ for (i = 0; i < card->num_rtd; i++) {
+ struct snd_soc_pcm_runtime *rtd = &card->rtd[i];
+ flush_delayed_work(&rtd->delayed_work);
+ }
+
+ snd_soc_dapm_shutdown(card);
+
+ /* deactivate pins to sleep state */
+ for (i = 0; i < card->num_rtd; i++) {
+ struct snd_soc_pcm_runtime *rtd = &card->rtd[i];
+ struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
+ int j;
+
+ pinctrl_pm_select_sleep_state(cpu_dai->dev);
+ for (j = 0; j < rtd->num_codecs; j++) {
+ struct snd_soc_dai *codec_dai = rtd->codec_dais[j];
+ 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_codec_controls - add an array of controls to a codec.
+ * Convenience function to add a list of controls. Many codecs were
+ * duplicating this code.
+ *
+ * @codec: codec 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_codec_controls(struct snd_soc_codec *codec,
+ const struct snd_kcontrol_new *controls, unsigned int num_controls)
+{
+ return snd_soc_add_component_controls(&codec->component, controls,
+ num_controls);
+}
+EXPORT_SYMBOL_GPL(snd_soc_add_codec_controls);
+
+/**
+ * snd_soc_add_platform_controls - add an array of controls to a platform.
+ * Convenience function to add a list of controls.
+ *
+ * @platform: platform 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_platform_controls(struct snd_soc_platform *platform,
+ const struct snd_kcontrol_new *controls, unsigned int num_controls)
+{
+ return snd_soc_add_component_controls(&platform->component, controls,
+ num_controls);
+}
+EXPORT_SYMBOL_GPL(snd_soc_add_platform_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 && dai->driver->ops->set_sysclk)
+ return dai->driver->ops->set_sysclk(dai, clk_id, freq, dir);
+ else if (dai->codec && dai->codec->driver->set_sysclk)
+ return dai->codec->driver->set_sysclk(dai->codec, clk_id, 0,
+ freq, dir);
+ else
+ return -ENOTSUPP;
+}
+EXPORT_SYMBOL_GPL(snd_soc_dai_set_sysclk);
+
+/**
+ * snd_soc_codec_set_sysclk - configure CODEC system or master clock.
+ * @codec: CODEC
+ * @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_codec_set_sysclk(struct snd_soc_codec *codec, int clk_id,
+ int source, unsigned int freq, int dir)
+{
+ if (codec->driver->set_sysclk)
+ return codec->driver->set_sysclk(codec, clk_id, source,
+ freq, dir);
+ else
+ return -ENOTSUPP;
+}
+EXPORT_SYMBOL_GPL(snd_soc_codec_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 && 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 && dai->driver->ops->set_pll)
+ return dai->driver->ops->set_pll(dai, pll_id, source,
+ freq_in, freq_out);
+ else if (dai->codec && dai->codec->driver->set_pll)
+ return dai->codec->driver->set_pll(dai->codec, pll_id, source,
+ freq_in, freq_out);
+ else
+ return -EINVAL;
+}
+EXPORT_SYMBOL_GPL(snd_soc_dai_set_pll);
+
+/*
+ * snd_soc_codec_set_pll - configure codec PLL.
+ * @codec: CODEC
+ * @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_codec_set_pll(struct snd_soc_codec *codec, int pll_id, int source,
+ unsigned int freq_in, unsigned int freq_out)
+{
+ if (codec->driver->set_pll)
+ return codec->driver->set_pll(codec, pll_id, source,
+ freq_in, freq_out);
+ else
+ return -EINVAL;
+}
+EXPORT_SYMBOL_GPL(snd_soc_codec_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 && 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 && 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 && 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 && 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_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 && 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);
+
+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;
+}
+
+/**
+ * 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, j, ret;
+
+ 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 = snd_soc_init_multicodec(card, link);
+ if (ret) {
+ dev_err(card->dev, "ASoC: failed to init multicodec\n");
+ return ret;
+ }
+
+ for (j = 0; j < link->num_codecs; j++) {
+ /*
+ * Codec must be specified by 1 of name or OF node,
+ * not both or neither.
+ */
+ if (!!link->codecs[j].name ==
+ !!link->codecs[j].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[j].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;
+ }
+ }
+
+ dev_set_drvdata(card->dev, card);
+
+ snd_soc_initialize_card_lists(card);
+
+ card->rtd = devm_kzalloc(card->dev,
+ sizeof(struct snd_soc_pcm_runtime) *
+ (card->num_links + card->num_aux_devs),
+ GFP_KERNEL);
+ if (card->rtd == NULL)
+ return -ENOMEM;
+ card->num_rtd = 0;
+ card->rtd_aux = &card->rtd[card->num_links];
+
+ for (i = 0; i < card->num_links; i++) {
+ card->rtd[i].card = card;
+ card->rtd[i].dai_link = &card->dai_link[i];
+ card->rtd[i].codec_dais = devm_kzalloc(card->dev,
+ sizeof(struct snd_soc_dai *) *
+ (card->rtd[i].dai_link->num_codecs),
+ GFP_KERNEL);
+ if (card->rtd[i].codec_dais == NULL)
+ return -ENOMEM;
+ }
+
+ for (i = 0; i < card->num_aux_devs; i++)
+ card->rtd_aux[i].card = card;
+
+ INIT_LIST_HEAD(&card->dapm_dirty);
+ card->instantiated = 0;
+ mutex_init(&card->mutex);
+ mutex_init(&card->dapm_mutex);
+
+ ret = snd_soc_instantiate_card(card);
+ if (ret != 0)
+ return ret;
+
+ /* deactivate pins to sleep state */
+ for (i = 0; i < card->num_rtd; i++) {
+ struct snd_soc_pcm_runtime *rtd = &card->rtd[i];
+ 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);
+ }
+}
+
+/**
+ * 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,
+ bool legacy_dai_naming)
+{
+ 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);
+
+ component->dai_drv = dai_drv;
+ component->num_dai = count;
+
+ for (i = 0; i < count; i++) {
+
+ dai = kzalloc(sizeof(struct snd_soc_dai), GFP_KERNEL);
+ if (dai == NULL) {
+ ret = -ENOMEM;
+ goto err;
+ }
+
+ /*
+ * 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 (count == 1 && legacy_dai_naming) {
+ dai->name = fmt_single_name(dev, &dai->id);
+ } else {
+ dai->name = fmt_multiple_name(dev, &dai_drv[i]);
+ if (dai_drv[i].id)
+ dai->id = dai_drv[i].id;
+ else
+ dai->id = i;
+ }
+ if (dai->name == NULL) {
+ kfree(dai);
+ ret = -ENOMEM;
+ goto err;
+ }
+
+ dai->component = component;
+ dai->dev = dev;
+ dai->driver = &dai_drv[i];
+ if (!dai->driver->ops)
+ dai->driver->ops = &null_dai_ops;
+
+ list_add(&dai->list, &component->dai_list);
+
+ dev_dbg(dev, "ASoC: Registered DAI '%s'\n", dai->name);
+ }
+
+ return 0;
+
+err:
+ snd_soc_unregister_dais(component);
+
+ return ret;
+}
+
+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_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;
+ component->probe = component->driver->probe;
+ component->remove = component->driver->remove;
+
+ if (!component->dapm_ptr)
+ component->dapm_ptr = &component->dapm;
+
+ dapm = component->dapm_ptr;
+ dapm->dev = dev;
+ dapm->component = component;
+ dapm->bias_level = SND_SOC_BIAS_OFF;
+ dapm->idle_bias_off = true;
+ if (driver->seq_notifier)
+ dapm->seq_notifier = snd_soc_component_seq_notifier;
+ if (driver->stream_event)
+ dapm->stream_event = snd_soc_component_stream_event;
+
+ component->controls = driver->controls;
+ component->num_controls = driver->num_controls;
+ component->dapm_widgets = driver->dapm_widgets;
+ component->num_dapm_widgets = driver->num_dapm_widgets;
+ component->dapm_routes = driver->dapm_routes;
+ component->num_dapm_routes = driver->num_dapm_routes;
+
+ 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_unlocked(struct snd_soc_component *component)
+{
+ if (!component->write && !component->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);
+}
+
+static void snd_soc_component_add(struct snd_soc_component *component)
+{
+ mutex_lock(&client_mutex);
+ snd_soc_component_add_unlocked(component);
+ 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)
+{
+ list_del(&component->list);
+}
+
+int snd_soc_register_component(struct device *dev,
+ const struct snd_soc_component_driver *cmpnt_drv,
+ struct snd_soc_dai_driver *dai_drv,
+ int num_dai)
+{
+ struct snd_soc_component *cmpnt;
+ int ret;
+
+ cmpnt = kzalloc(sizeof(*cmpnt), GFP_KERNEL);
+ if (!cmpnt) {
+ dev_err(dev, "ASoC: Failed to allocate memory\n");
+ return -ENOMEM;
+ }
+
+ ret = snd_soc_component_initialize(cmpnt, cmpnt_drv, dev);
+ if (ret)
+ goto err_free;
+
+ cmpnt->ignore_pmdown_time = true;
+ cmpnt->registered_as_component = true;
+
+ ret = snd_soc_register_dais(cmpnt, dai_drv, num_dai, true);
+ if (ret < 0) {
+ dev_err(dev, "ASoC: Failed to register DAIs: %d\n", ret);
+ goto err_cleanup;
+ }
+
+ snd_soc_component_add(cmpnt);
+
+ return 0;
+
+err_cleanup:
+ snd_soc_component_cleanup(cmpnt);
+err_free:
+ kfree(cmpnt);
+ return ret;
+}
+EXPORT_SYMBOL_GPL(snd_soc_register_component);
+
+/**
+ * snd_soc_unregister_component - Unregister a component from the ASoC core
+ *
+ */
+void snd_soc_unregister_component(struct device *dev)
+{
+ struct snd_soc_component *cmpnt;
+
+ mutex_lock(&client_mutex);
+ list_for_each_entry(cmpnt, &component_list, list) {
+ if (dev == cmpnt->dev && cmpnt->registered_as_component)
+ goto found;
+ }
+ mutex_unlock(&client_mutex);
+ return;
+
+found:
+ snd_soc_component_del_unlocked(cmpnt);
+ mutex_unlock(&client_mutex);
+ snd_soc_component_cleanup(cmpnt);
+ kfree(cmpnt);
+}
+EXPORT_SYMBOL_GPL(snd_soc_unregister_component);
+
+static int snd_soc_platform_drv_probe(struct snd_soc_component *component)
+{
+ struct snd_soc_platform *platform = snd_soc_component_to_platform(component);
+
+ return platform->driver->probe(platform);
+}
+
+static void snd_soc_platform_drv_remove(struct snd_soc_component *component)
+{
+ struct snd_soc_platform *platform = snd_soc_component_to_platform(component);
+
+ platform->driver->remove(platform);
+}
+
+/**
+ * snd_soc_add_platform - Add a platform to the ASoC core
+ * @dev: The parent device for the platform
+ * @platform: The platform to add
+ * @platform_driver: The driver for the platform
+ */
+int snd_soc_add_platform(struct device *dev, struct snd_soc_platform *platform,
+ const struct snd_soc_platform_driver *platform_drv)
+{
+ int ret;
+
+ ret = snd_soc_component_initialize(&platform->component,
+ &platform_drv->component_driver, dev);
+ if (ret)
+ return ret;
+
+ platform->dev = dev;
+ platform->driver = platform_drv;
+
+ if (platform_drv->probe)
+ platform->component.probe = snd_soc_platform_drv_probe;
+ if (platform_drv->remove)
+ platform->component.remove = snd_soc_platform_drv_remove;
+
+#ifdef CONFIG_DEBUG_FS
+ platform->component.debugfs_prefix = "platform";
+#endif
+
+ mutex_lock(&client_mutex);
+ snd_soc_component_add_unlocked(&platform->component);
+ list_add(&platform->list, &platform_list);
+ mutex_unlock(&client_mutex);
+
+ dev_dbg(dev, "ASoC: Registered platform '%s'\n",
+ platform->component.name);
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(snd_soc_add_platform);
+
+/**
+ * snd_soc_register_platform - Register a platform with the ASoC core
+ *
+ * @platform: platform to register
+ */
+int snd_soc_register_platform(struct device *dev,
+ const struct snd_soc_platform_driver *platform_drv)
+{
+ struct snd_soc_platform *platform;
+ int ret;
+
+ dev_dbg(dev, "ASoC: platform register %s\n", dev_name(dev));
+
+ platform = kzalloc(sizeof(struct snd_soc_platform), GFP_KERNEL);
+ if (platform == NULL)
+ return -ENOMEM;
+
+ ret = snd_soc_add_platform(dev, platform, platform_drv);
+ if (ret)
+ kfree(platform);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(snd_soc_register_platform);
+
+/**
+ * snd_soc_remove_platform - Remove a platform from the ASoC core
+ * @platform: the platform to remove
+ */
+void snd_soc_remove_platform(struct snd_soc_platform *platform)
+{
+
+ mutex_lock(&client_mutex);
+ list_del(&platform->list);
+ snd_soc_component_del_unlocked(&platform->component);
+ mutex_unlock(&client_mutex);
+
+ dev_dbg(platform->dev, "ASoC: Unregistered platform '%s'\n",
+ platform->component.name);
+
+ snd_soc_component_cleanup(&platform->component);
+}
+EXPORT_SYMBOL_GPL(snd_soc_remove_platform);
+
+struct snd_soc_platform *snd_soc_lookup_platform(struct device *dev)
+{
+ struct snd_soc_platform *platform;
+
+ mutex_lock(&client_mutex);
+ list_for_each_entry(platform, &platform_list, list) {
+ if (dev == platform->dev) {
+ mutex_unlock(&client_mutex);
+ return platform;
+ }
+ }
+ mutex_unlock(&client_mutex);
+
+ return NULL;
+}
+EXPORT_SYMBOL_GPL(snd_soc_lookup_platform);
+
+/**
+ * snd_soc_unregister_platform - Unregister a platform from the ASoC core
+ *
+ * @platform: platform to unregister
+ */
+void snd_soc_unregister_platform(struct device *dev)
+{
+ struct snd_soc_platform *platform;
+
+ platform = snd_soc_lookup_platform(dev);
+ if (!platform)
+ return;
+
+ snd_soc_remove_platform(platform);
+ kfree(platform);
+}
+EXPORT_SYMBOL_GPL(snd_soc_unregister_platform);
+
+static u64 codec_format_map[] = {
+ SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S16_BE,
+ SNDRV_PCM_FMTBIT_U16_LE | SNDRV_PCM_FMTBIT_U16_BE,
+ SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S24_BE,
+ SNDRV_PCM_FMTBIT_U24_LE | SNDRV_PCM_FMTBIT_U24_BE,
+ SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_S32_BE,
+ SNDRV_PCM_FMTBIT_U32_LE | SNDRV_PCM_FMTBIT_U32_BE,
+ SNDRV_PCM_FMTBIT_S24_3LE | SNDRV_PCM_FMTBIT_U24_3BE,
+ SNDRV_PCM_FMTBIT_U24_3LE | SNDRV_PCM_FMTBIT_U24_3BE,
+ SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S20_3BE,
+ SNDRV_PCM_FMTBIT_U20_3LE | SNDRV_PCM_FMTBIT_U20_3BE,
+ SNDRV_PCM_FMTBIT_S18_3LE | SNDRV_PCM_FMTBIT_S18_3BE,
+ SNDRV_PCM_FMTBIT_U18_3LE | SNDRV_PCM_FMTBIT_U18_3BE,
+ SNDRV_PCM_FMTBIT_FLOAT_LE | SNDRV_PCM_FMTBIT_FLOAT_BE,
+ SNDRV_PCM_FMTBIT_FLOAT64_LE | SNDRV_PCM_FMTBIT_FLOAT64_BE,
+ SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE
+ | SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_BE,
+};
+
+/* 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 fixup_codec_formats(struct snd_soc_pcm_stream *stream)
+{
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(codec_format_map); i++)
+ if (stream->formats & codec_format_map[i])
+ stream->formats |= codec_format_map[i];
+}
+
+static int snd_soc_codec_drv_probe(struct snd_soc_component *component)
+{
+ struct snd_soc_codec *codec = snd_soc_component_to_codec(component);
+
+ return codec->driver->probe(codec);
+}
+
+static void snd_soc_codec_drv_remove(struct snd_soc_component *component)
+{
+ struct snd_soc_codec *codec = snd_soc_component_to_codec(component);
+
+ codec->driver->remove(codec);
+}
+
+static int snd_soc_codec_drv_write(struct snd_soc_component *component,
+ unsigned int reg, unsigned int val)
+{
+ struct snd_soc_codec *codec = snd_soc_component_to_codec(component);
+
+ return codec->driver->write(codec, reg, val);
+}
+
+static int snd_soc_codec_drv_read(struct snd_soc_component *component,
+ unsigned int reg, unsigned int *val)
+{
+ struct snd_soc_codec *codec = snd_soc_component_to_codec(component);
+
+ *val = codec->driver->read(codec, reg);
+
+ return 0;
+}
+
+static int snd_soc_codec_set_bias_level(struct snd_soc_dapm_context *dapm,
+ enum snd_soc_bias_level level)
+{
+ struct snd_soc_codec *codec = snd_soc_dapm_to_codec(dapm);
+
+ return codec->driver->set_bias_level(codec, level);
+}
+
+/**
+ * snd_soc_register_codec - Register a codec with the ASoC core
+ *
+ * @codec: codec to register
+ */
+int snd_soc_register_codec(struct device *dev,
+ const struct snd_soc_codec_driver *codec_drv,
+ struct snd_soc_dai_driver *dai_drv,
+ int num_dai)
+{
+ struct snd_soc_codec *codec;
+ struct snd_soc_dai *dai;
+ int ret, i;
+
+ dev_dbg(dev, "codec register %s\n", dev_name(dev));
+
+ codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL);
+ if (codec == NULL)
+ return -ENOMEM;
+
+ codec->component.dapm_ptr = &codec->dapm;
+ codec->component.codec = codec;
+
+ ret = snd_soc_component_initialize(&codec->component,
+ &codec_drv->component_driver, dev);
+ if (ret)
+ goto err_free;
+
+ if (codec_drv->controls) {
+ codec->component.controls = codec_drv->controls;
+ codec->component.num_controls = codec_drv->num_controls;
+ }
+ if (codec_drv->dapm_widgets) {
+ codec->component.dapm_widgets = codec_drv->dapm_widgets;
+ codec->component.num_dapm_widgets = codec_drv->num_dapm_widgets;
+ }
+ if (codec_drv->dapm_routes) {
+ codec->component.dapm_routes = codec_drv->dapm_routes;
+ codec->component.num_dapm_routes = codec_drv->num_dapm_routes;
+ }
+
+ if (codec_drv->probe)
+ codec->component.probe = snd_soc_codec_drv_probe;
+ if (codec_drv->remove)
+ codec->component.remove = snd_soc_codec_drv_remove;
+ if (codec_drv->write)
+ codec->component.write = snd_soc_codec_drv_write;
+ if (codec_drv->read)
+ codec->component.read = snd_soc_codec_drv_read;
+ codec->component.ignore_pmdown_time = codec_drv->ignore_pmdown_time;
+ codec->dapm.idle_bias_off = codec_drv->idle_bias_off;
+ codec->dapm.suspend_bias_off = codec_drv->suspend_bias_off;
+ if (codec_drv->seq_notifier)
+ codec->dapm.seq_notifier = codec_drv->seq_notifier;
+ if (codec_drv->set_bias_level)
+ codec->dapm.set_bias_level = snd_soc_codec_set_bias_level;
+ codec->dev = dev;
+ codec->driver = codec_drv;
+ codec->component.val_bytes = codec_drv->reg_word_size;
+
+#ifdef CONFIG_DEBUG_FS
+ codec->component.init_debugfs = soc_init_codec_debugfs;
+ codec->component.debugfs_prefix = "codec";
+#endif
+
+ if (codec_drv->get_regmap)
+ codec->component.regmap = codec_drv->get_regmap(dev);
+
+ for (i = 0; i < num_dai; i++) {
+ fixup_codec_formats(&dai_drv[i].playback);
+ fixup_codec_formats(&dai_drv[i].capture);
+ }
+
+ ret = snd_soc_register_dais(&codec->component, dai_drv, num_dai, false);
+ if (ret < 0) {
+ dev_err(dev, "ASoC: Failed to register DAIs: %d\n", ret);
+ goto err_cleanup;
+ }
+
+ list_for_each_entry(dai, &codec->component.dai_list, list)
+ dai->codec = codec;
+
+ mutex_lock(&client_mutex);
+ snd_soc_component_add_unlocked(&codec->component);
+ list_add(&codec->list, &codec_list);
+ mutex_unlock(&client_mutex);
+
+ dev_dbg(codec->dev, "ASoC: Registered codec '%s'\n",
+ codec->component.name);
+ return 0;
+
+err_cleanup:
+ snd_soc_component_cleanup(&codec->component);
+err_free:
+ kfree(codec);
+ return ret;
+}
+EXPORT_SYMBOL_GPL(snd_soc_register_codec);
+
+/**
+ * snd_soc_unregister_codec - Unregister a codec from the ASoC core
+ *
+ * @codec: codec to unregister
+ */
+void snd_soc_unregister_codec(struct device *dev)
+{
+ struct snd_soc_codec *codec;
+
+ mutex_lock(&client_mutex);
+ list_for_each_entry(codec, &codec_list, list) {
+ if (dev == codec->dev)
+ goto found;
+ }
+ mutex_unlock(&client_mutex);
+ return;
+
+found:
+ list_del(&codec->list);
+ snd_soc_component_del_unlocked(&codec->component);
+ mutex_unlock(&client_mutex);
+
+ dev_dbg(codec->dev, "ASoC: Unregistered codec '%s'\n",
+ codec->component.name);
+
+ snd_soc_component_cleanup(&codec->component);
+ snd_soc_cache_exit(codec);
+ kfree(codec);
+}
+EXPORT_SYMBOL_GPL(snd_soc_unregister_codec);
+
+/* 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_parse_tdm_slot(struct device_node *np,
+ unsigned int *slots,
+ unsigned int *slot_width)
+{
+ u32 val;
+ int ret;
+
+ 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);
+
+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_kzalloc(card->dev, num_routes * sizeof(*routes),
+ GFP_KERNEL);
+ if (!routes) {
+ dev_err(card->dev,
+ "ASoC: Could not allocate DAPM route table\n");
+ return -EINVAL;
+ }
+
+ 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 "[prefix]format = xxx"
+ * SND_SOC_DAIFMT_FORMAT_MASK area
+ */
+ 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_get_property(np, prop, NULL))
+ 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);
+
+static int snd_soc_get_dai_name(struct of_phandle_args *args,
+ const char **dai_name)
+{
+ struct snd_soc_component *pos;
+ int ret = -EPROBE_DEFER;
+
+ mutex_lock(&client_mutex);
+ list_for_each_entry(pos, &component_list, list) {
+ if (pos->dev->of_node != args->np)
+ continue;
+
+ if (pos->driver->of_xlate_dai_name) {
+ ret = pos->driver->of_xlate_dai_name(pos,
+ args,
+ dai_name);
+ } else {
+ 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;
+
+ *dai_name = pos->dai_drv[id].name;
+ if (!*dai_name)
+ *dai_name = pos->name;
+ }
+
+ break;
+ }
+ mutex_unlock(&client_mutex);
+ return ret;
+}
+
+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_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 the caller.
+ *
+ * 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_kzalloc(dev,
+ sizeof *component * num_codecs,
+ 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:
+ for (index = 0, component = dai_link->codecs;
+ index < dai_link->num_codecs;
+ index++, component++) {
+ if (!component->of_node)
+ break;
+ of_node_put(component->of_node);
+ component->of_node = NULL;
+ }
+ 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();
+
+#ifdef CONFIG_DEBUG_FS
+#endif
+ 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");
Code Review / kvmfornfv.git / blobdiff