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6b3ed78535
linux/sound/soc/soc-core.c
Axel Lin 6b3ed78535 ASoC: Fix snd_soc_instantiate_card error path 
Properly free the resources in the case of snd_card_register failure
and soc_register_ac97_dai_link failure.

Signed-off-by: Axel Lin <axel.lin@gmail.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
2010-12-07 15:27:14 +00:00

3635 lines
94 KiB
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/*
* 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/slab.h>
#include <sound/ac97_codec.h>
#include <sound/core.h>
#include <sound/jack.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>
#include <sound/initval.h>
#define CREATE_TRACE_POINTS
#include <trace/events/asoc.h>
#define NAME_SIZE 32
static DEFINE_MUTEX(pcm_mutex);
static DECLARE_WAIT_QUEUE_HEAD(soc_pm_waitq);
#ifdef CONFIG_DEBUG_FS
static struct dentry *debugfs_root;
#endif
static DEFINE_MUTEX(client_mutex);
static LIST_HEAD(card_list);
static LIST_HEAD(dai_list);
static LIST_HEAD(platform_list);
static LIST_HEAD(codec_list);
static int snd_soc_register_card(struct snd_soc_card *card);
static int snd_soc_unregister_card(struct snd_soc_card *card);
static int soc_new_pcm(struct snd_soc_pcm_runtime *rtd, int num);
/*
* 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)");
/*
* This function forces any delayed work to be queued and run.
*/
static int run_delayed_work(struct delayed_work *dwork)
{
int ret;
/* cancel any work waiting to be queued. */
ret = cancel_delayed_work(dwork);
/* if there was any work waiting then we run it now and
* wait for it's completion */
if (ret) {
schedule_delayed_work(dwork, 0);
flush_scheduled_work();
}
return ret;
}
/* codec register dump */
static ssize_t soc_codec_reg_show(struct snd_soc_codec *codec, char *buf)
{
int ret, i, step = 1, count = 0;
if (!codec->driver->reg_cache_size)
return 0;
if (codec->driver->reg_cache_step)
step = codec->driver->reg_cache_step;
count += sprintf(buf, "%s registers\n", codec->name);
for (i = 0; i < codec->driver->reg_cache_size; i += step) {
if (codec->driver->readable_register && !codec->driver->readable_register(i))
continue;
count += sprintf(buf + count, "%2x: ", i);
if (count >= PAGE_SIZE - 1)
break;
if (codec->driver->display_register) {
count += codec->driver->display_register(codec, buf + count,
PAGE_SIZE - count, i);
} else {
/* If the read fails it's almost certainly due to
* the register being volatile and the device being
* powered off.
*/
ret = codec->driver->read(codec, i);
if (ret >= 0)
count += snprintf(buf + count,
PAGE_SIZE - count,
"%4x", ret);
else
count += snprintf(buf + count,
PAGE_SIZE - count,
"<no data: %d>", ret);
}
if (count >= PAGE_SIZE - 1)
break;
count += snprintf(buf + count, PAGE_SIZE - count, "\n");
if (count >= PAGE_SIZE - 1)
break;
}
/* Truncate count; min() would cause a warning */
if (count >= PAGE_SIZE)
count = PAGE_SIZE - 1;
return count;
}
static ssize_t codec_reg_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct snd_soc_pcm_runtime *rtd =
container_of(dev, struct snd_soc_pcm_runtime, dev);
return soc_codec_reg_show(rtd->codec, buf);
}
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 =
container_of(dev, struct snd_soc_pcm_runtime, 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 =
container_of(dev, struct snd_soc_pcm_runtime, dev);
int ret;
ret = strict_strtol(buf, 10, &rtd->pmdown_time);
if (ret)
return ret;
return count;
}
static DEVICE_ATTR(pmdown_time, 0644, pmdown_time_show, pmdown_time_set);
#ifdef CONFIG_DEBUG_FS
static int codec_reg_open_file(struct inode *inode, struct file *file)
{
file->private_data = inode->i_private;
return 0;
}
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 = kmalloc(PAGE_SIZE, GFP_KERNEL);
if (!buf)
return -ENOMEM;
ret = soc_codec_reg_show(codec, buf);
if (ret >= 0)
ret = simple_read_from_buffer(user_buf, count, ppos, buf, 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];
int buf_size;
char *start = buf;
unsigned long reg, value;
int step = 1;
struct snd_soc_codec *codec = file->private_data;
buf_size = min(count, (sizeof(buf)-1));
if (copy_from_user(buf, user_buf, buf_size))
return -EFAULT;
buf[buf_size] = 0;
if (codec->driver->reg_cache_step)
step = codec->driver->reg_cache_step;
while (*start == ' ')
start++;
reg = simple_strtoul(start, &start, 16);
if ((reg >= codec->driver->reg_cache_size) || (reg % step))
return -EINVAL;
while (*start == ' ')
start++;
if (strict_strtoul(start, 16, &value))
return -EINVAL;
codec->driver->write(codec, reg, value);
return buf_size;
}
static const struct file_operations codec_reg_fops = {
.open = codec_reg_open_file,
.read = codec_reg_read_file,
.write = codec_reg_write_file,
.llseek = default_llseek,
};
static void soc_init_codec_debugfs(struct snd_soc_codec *codec)
{
struct dentry *debugfs_card_root = codec->card->debugfs_card_root;
codec->debugfs_codec_root = debugfs_create_dir(codec->name,
debugfs_card_root);
if (!codec->debugfs_codec_root) {
printk(KERN_WARNING
"ASoC: Failed to create codec debugfs directory\n");
return;
}
codec->debugfs_reg = debugfs_create_file("codec_reg", 0644,
codec->debugfs_codec_root,
codec, &codec_reg_fops);
if (!codec->debugfs_reg)
printk(KERN_WARNING
"ASoC: Failed to create codec register debugfs file\n");
codec->dapm.debugfs_dapm = debugfs_create_dir("dapm",
codec->debugfs_codec_root);
if (!codec->dapm.debugfs_dapm)
printk(KERN_WARNING
"Failed to create DAPM debugfs directory\n");
snd_soc_dapm_debugfs_init(&codec->dapm);
}
static void soc_cleanup_codec_debugfs(struct snd_soc_codec *codec)
{
debugfs_remove_recursive(codec->debugfs_codec_root);
}
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;
list_for_each_entry(codec, &codec_list, list) {
len = snprintf(buf + ret, PAGE_SIZE - ret, "%s\n",
codec->name);
if (len >= 0)
ret += len;
if (ret > PAGE_SIZE) {
ret = PAGE_SIZE;
break;
}
}
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_dai *dai;
if (!buf)
return -ENOMEM;
list_for_each_entry(dai, &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;
}
}
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;
list_for_each_entry(platform, &platform_list, list) {
len = snprintf(buf + ret, PAGE_SIZE - ret, "%s\n",
platform->name);
if (len >= 0)
ret += len;
if (ret > PAGE_SIZE) {
ret = PAGE_SIZE;
break;
}
}
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)
{
card->debugfs_card_root = debugfs_create_dir(card->name,
debugfs_root);
if (!card->debugfs_card_root) {
dev_warn(card->dev,
"ASoC: Failed to create codec 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,
"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);
}
#else
static inline void soc_init_codec_debugfs(struct snd_soc_codec *codec)
{
}
static inline void soc_cleanup_codec_debugfs(struct snd_soc_codec *codec)
{
}
static inline void soc_init_card_debugfs(struct snd_soc_card *card)
{
}
static inline void soc_cleanup_card_debugfs(struct snd_soc_card *card)
{
}
#endif
#ifdef CONFIG_SND_SOC_AC97_BUS
/* unregister ac97 codec */
static int soc_ac97_dev_unregister(struct snd_soc_codec *codec)
{
if (codec->ac97->dev.bus)
device_unregister(&codec->ac97->dev);
return 0;
}
/* stop no dev release warning */
static void soc_ac97_device_release(struct device *dev){}
/* register ac97 codec to bus */
static int soc_ac97_dev_register(struct snd_soc_codec *codec)
{
int err;
codec->ac97->dev.bus = &ac97_bus_type;
codec->ac97->dev.parent = codec->card->dev;
codec->ac97->dev.release = soc_ac97_device_release;
dev_set_name(&codec->ac97->dev, "%d-%d:%s",
codec->card->snd_card->number, 0, codec->name);
err = device_register(&codec->ac97->dev);
if (err < 0) {
snd_printk(KERN_ERR "Can't register ac97 bus\n");
codec->ac97->dev.bus = NULL;
return err;
}
return 0;
}
#endif
static int soc_pcm_apply_symmetry(struct snd_pcm_substream *substream)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
struct snd_soc_dai *codec_dai = rtd->codec_dai;
int ret;
if (codec_dai->driver->symmetric_rates || cpu_dai->driver->symmetric_rates ||
rtd->dai_link->symmetric_rates) {
dev_dbg(&rtd->dev, "Symmetry forces %dHz rate\n",
rtd->rate);
ret = snd_pcm_hw_constraint_minmax(substream->runtime,
SNDRV_PCM_HW_PARAM_RATE,
rtd->rate,
rtd->rate);
if (ret < 0) {
dev_err(&rtd->dev,
"Unable to apply rate symmetry constraint: %d\n", ret);
return ret;
}
}
return 0;
}
/*
* Called by ALSA when a PCM substream is opened, the runtime->hw record is
* then initialized and any private data can be allocated. This also calls
* startup for the cpu DAI, platform, machine and codec DAI.
*/
static int soc_pcm_open(struct snd_pcm_substream *substream)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct snd_pcm_runtime *runtime = substream->runtime;
struct snd_soc_platform *platform = rtd->platform;
struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
struct snd_soc_dai *codec_dai = rtd->codec_dai;
struct snd_soc_dai_driver *cpu_dai_drv = cpu_dai->driver;
struct snd_soc_dai_driver *codec_dai_drv = codec_dai->driver;
int ret = 0;
mutex_lock(&pcm_mutex);
/* startup the audio subsystem */
if (cpu_dai->driver->ops->startup) {
ret = cpu_dai->driver->ops->startup(substream, cpu_dai);
if (ret < 0) {
printk(KERN_ERR "asoc: can't open interface %s\n",
cpu_dai->name);
goto out;
}
}
if (platform->driver->ops->open) {
ret = platform->driver->ops->open(substream);
if (ret < 0) {
printk(KERN_ERR "asoc: can't open platform %s\n", platform->name);
goto platform_err;
}
}
if (codec_dai->driver->ops->startup) {
ret = codec_dai->driver->ops->startup(substream, codec_dai);
if (ret < 0) {
printk(KERN_ERR "asoc: can't open codec %s\n",
codec_dai->name);
goto codec_dai_err;
}
}
if (rtd->dai_link->ops && rtd->dai_link->ops->startup) {
ret = rtd->dai_link->ops->startup(substream);
if (ret < 0) {
printk(KERN_ERR "asoc: %s startup failed\n", rtd->dai_link->name);
goto machine_err;
}
}
/* Check that the codec and cpu DAIs are compatible */
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
runtime->hw.rate_min =
max(codec_dai_drv->playback.rate_min,
cpu_dai_drv->playback.rate_min);
runtime->hw.rate_max =
min(codec_dai_drv->playback.rate_max,
cpu_dai_drv->playback.rate_max);
runtime->hw.channels_min =
max(codec_dai_drv->playback.channels_min,
cpu_dai_drv->playback.channels_min);
runtime->hw.channels_max =
min(codec_dai_drv->playback.channels_max,
cpu_dai_drv->playback.channels_max);
runtime->hw.formats =
codec_dai_drv->playback.formats & cpu_dai_drv->playback.formats;
runtime->hw.rates =
codec_dai_drv->playback.rates & cpu_dai_drv->playback.rates;
if (codec_dai_drv->playback.rates
& (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))
runtime->hw.rates |= cpu_dai_drv->playback.rates;
if (cpu_dai_drv->playback.rates
& (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))
runtime->hw.rates |= codec_dai_drv->playback.rates;
} else {
runtime->hw.rate_min =
max(codec_dai_drv->capture.rate_min,
cpu_dai_drv->capture.rate_min);
runtime->hw.rate_max =
min(codec_dai_drv->capture.rate_max,
cpu_dai_drv->capture.rate_max);
runtime->hw.channels_min =
max(codec_dai_drv->capture.channels_min,
cpu_dai_drv->capture.channels_min);
runtime->hw.channels_max =
min(codec_dai_drv->capture.channels_max,
cpu_dai_drv->capture.channels_max);
runtime->hw.formats =
codec_dai_drv->capture.formats & cpu_dai_drv->capture.formats;
runtime->hw.rates =
codec_dai_drv->capture.rates & cpu_dai_drv->capture.rates;
if (codec_dai_drv->capture.rates
& (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))
runtime->hw.rates |= cpu_dai_drv->capture.rates;
if (cpu_dai_drv->capture.rates
& (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))
runtime->hw.rates |= codec_dai_drv->capture.rates;
}
snd_pcm_limit_hw_rates(runtime);
if (!runtime->hw.rates) {
printk(KERN_ERR "asoc: %s <-> %s No matching rates\n",
codec_dai->name, cpu_dai->name);
goto config_err;
}
if (!runtime->hw.formats) {
printk(KERN_ERR "asoc: %s <-> %s No matching formats\n",
codec_dai->name, cpu_dai->name);
goto config_err;
}
if (!runtime->hw.channels_min || !runtime->hw.channels_max) {
printk(KERN_ERR "asoc: %s <-> %s No matching channels\n",
codec_dai->name, cpu_dai->name);
goto config_err;
}
/* Symmetry only applies if we've already got an active stream. */
if (cpu_dai->active || codec_dai->active) {
ret = soc_pcm_apply_symmetry(substream);
if (ret != 0)
goto config_err;
}
pr_debug("asoc: %s <-> %s info:\n",
codec_dai->name, cpu_dai->name);
pr_debug("asoc: rate mask 0x%x\n", runtime->hw.rates);
pr_debug("asoc: min ch %d max ch %d\n", runtime->hw.channels_min,
runtime->hw.channels_max);
pr_debug("asoc: min rate %d max rate %d\n", runtime->hw.rate_min,
runtime->hw.rate_max);
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
cpu_dai->playback_active++;
codec_dai->playback_active++;
} else {
cpu_dai->capture_active++;
codec_dai->capture_active++;
}
cpu_dai->active++;
codec_dai->active++;
rtd->codec->active++;
mutex_unlock(&pcm_mutex);
return 0;
config_err:
if (rtd->dai_link->ops && rtd->dai_link->ops->shutdown)
rtd->dai_link->ops->shutdown(substream);
machine_err:
if (codec_dai->driver->ops->shutdown)
codec_dai->driver->ops->shutdown(substream, codec_dai);
codec_dai_err:
if (platform->driver->ops->close)
platform->driver->ops->close(substream);
platform_err:
if (cpu_dai->driver->ops->shutdown)
cpu_dai->driver->ops->shutdown(substream, cpu_dai);
out:
mutex_unlock(&pcm_mutex);
return ret;
}
/*
* Power down the audio subsystem pmdown_time msecs after close is called.
* This is to ensure there are no pops or clicks in between any music tracks
* due to DAPM power cycling.
*/
static void close_delayed_work(struct work_struct *work)
{
struct snd_soc_pcm_runtime *rtd =
container_of(work, struct snd_soc_pcm_runtime, delayed_work.work);
struct snd_soc_dai *codec_dai = rtd->codec_dai;
mutex_lock(&pcm_mutex);
pr_debug("pop wq checking: %s status: %s waiting: %s\n",
codec_dai->driver->playback.stream_name,
codec_dai->playback_active ? "active" : "inactive",
codec_dai->pop_wait ? "yes" : "no");
/* are we waiting on this codec DAI stream */
if (codec_dai->pop_wait == 1) {
codec_dai->pop_wait = 0;
snd_soc_dapm_stream_event(rtd,
codec_dai->driver->playback.stream_name,
SND_SOC_DAPM_STREAM_STOP);
}
mutex_unlock(&pcm_mutex);
}
/*
* Called by ALSA when a PCM substream is closed. Private data can be
* freed here. The cpu DAI, codec DAI, machine and platform are also
* shutdown.
*/
static int soc_codec_close(struct snd_pcm_substream *substream)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct snd_soc_platform *platform = rtd->platform;
struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
struct snd_soc_dai *codec_dai = rtd->codec_dai;
struct snd_soc_codec *codec = rtd->codec;
mutex_lock(&pcm_mutex);
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
cpu_dai->playback_active--;
codec_dai->playback_active--;
} else {
cpu_dai->capture_active--;
codec_dai->capture_active--;
}
cpu_dai->active--;
codec_dai->active--;
codec->active--;
/* Muting the DAC suppresses artifacts caused during digital
* shutdown, for example from stopping clocks.
*/
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
snd_soc_dai_digital_mute(codec_dai, 1);
if (cpu_dai->driver->ops->shutdown)
cpu_dai->driver->ops->shutdown(substream, cpu_dai);
if (codec_dai->driver->ops->shutdown)
codec_dai->driver->ops->shutdown(substream, codec_dai);
if (rtd->dai_link->ops && rtd->dai_link->ops->shutdown)
rtd->dai_link->ops->shutdown(substream);
if (platform->driver->ops->close)
platform->driver->ops->close(substream);
cpu_dai->runtime = NULL;
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
/* start delayed pop wq here for playback streams */
codec_dai->pop_wait = 1;
schedule_delayed_work(&rtd->delayed_work,
msecs_to_jiffies(rtd->pmdown_time));
} else {
/* capture streams can be powered down now */
snd_soc_dapm_stream_event(rtd,
codec_dai->driver->capture.stream_name,
SND_SOC_DAPM_STREAM_STOP);
}
mutex_unlock(&pcm_mutex);
return 0;
}
/*
* Called by ALSA when the PCM substream is prepared, can set format, sample
* rate, etc. This function is non atomic and can be called multiple times,
* it can refer to the runtime info.
*/
static int soc_pcm_prepare(struct snd_pcm_substream *substream)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct snd_soc_platform *platform = rtd->platform;
struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
struct snd_soc_dai *codec_dai = rtd->codec_dai;
int ret = 0;
mutex_lock(&pcm_mutex);
if (rtd->dai_link->ops && rtd->dai_link->ops->prepare) {
ret = rtd->dai_link->ops->prepare(substream);
if (ret < 0) {
printk(KERN_ERR "asoc: machine prepare error\n");
goto out;
}
}
if (platform->driver->ops->prepare) {
ret = platform->driver->ops->prepare(substream);
if (ret < 0) {
printk(KERN_ERR "asoc: platform prepare error\n");
goto out;
}
}
if (codec_dai->driver->ops->prepare) {
ret = codec_dai->driver->ops->prepare(substream, codec_dai);
if (ret < 0) {
printk(KERN_ERR "asoc: codec DAI prepare error\n");
goto out;
}
}
if (cpu_dai->driver->ops->prepare) {
ret = cpu_dai->driver->ops->prepare(substream, cpu_dai);
if (ret < 0) {
printk(KERN_ERR "asoc: cpu DAI prepare error\n");
goto out;
}
}
/* cancel any delayed stream shutdown that is pending */
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
codec_dai->pop_wait) {
codec_dai->pop_wait = 0;
cancel_delayed_work(&rtd->delayed_work);
}
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
snd_soc_dapm_stream_event(rtd,
codec_dai->driver->playback.stream_name,
SND_SOC_DAPM_STREAM_START);
else
snd_soc_dapm_stream_event(rtd,
codec_dai->driver->capture.stream_name,
SND_SOC_DAPM_STREAM_START);
snd_soc_dai_digital_mute(codec_dai, 0);
out:
mutex_unlock(&pcm_mutex);
return ret;
}
/*
* Called by ALSA when the hardware params are set by application. This
* function can also be called multiple times and can allocate buffers
* (using snd_pcm_lib_* ). It's non-atomic.
*/
static int soc_pcm_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct snd_soc_platform *platform = rtd->platform;
struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
struct snd_soc_dai *codec_dai = rtd->codec_dai;
int ret = 0;
mutex_lock(&pcm_mutex);
if (rtd->dai_link->ops && rtd->dai_link->ops->hw_params) {
ret = rtd->dai_link->ops->hw_params(substream, params);
if (ret < 0) {
printk(KERN_ERR "asoc: machine hw_params failed\n");
goto out;
}
}
if (codec_dai->driver->ops->hw_params) {
ret = codec_dai->driver->ops->hw_params(substream, params, codec_dai);
if (ret < 0) {
printk(KERN_ERR "asoc: can't set codec %s hw params\n",
codec_dai->name);
goto codec_err;
}
}
if (cpu_dai->driver->ops->hw_params) {
ret = cpu_dai->driver->ops->hw_params(substream, params, cpu_dai);
if (ret < 0) {
printk(KERN_ERR "asoc: interface %s hw params failed\n",
cpu_dai->name);
goto interface_err;
}
}
if (platform->driver->ops->hw_params) {
ret = platform->driver->ops->hw_params(substream, params);
if (ret < 0) {
printk(KERN_ERR "asoc: platform %s hw params failed\n",
platform->name);
goto platform_err;
}
}
rtd->rate = params_rate(params);
out:
mutex_unlock(&pcm_mutex);
return ret;
platform_err:
if (cpu_dai->driver->ops->hw_free)
cpu_dai->driver->ops->hw_free(substream, cpu_dai);
interface_err:
if (codec_dai->driver->ops->hw_free)
codec_dai->driver->ops->hw_free(substream, codec_dai);
codec_err:
if (rtd->dai_link->ops && rtd->dai_link->ops->hw_free)
rtd->dai_link->ops->hw_free(substream);
mutex_unlock(&pcm_mutex);
return ret;
}
/*
* Frees resources allocated by hw_params, can be called multiple times
*/
static int soc_pcm_hw_free(struct snd_pcm_substream *substream)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct snd_soc_platform *platform = rtd->platform;
struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
struct snd_soc_dai *codec_dai = rtd->codec_dai;
struct snd_soc_codec *codec = rtd->codec;
mutex_lock(&pcm_mutex);
/* apply codec digital mute */
if (!codec->active)
snd_soc_dai_digital_mute(codec_dai, 1);
/* free any machine hw params */
if (rtd->dai_link->ops && rtd->dai_link->ops->hw_free)
rtd->dai_link->ops->hw_free(substream);
/* free any DMA resources */
if (platform->driver->ops->hw_free)
platform->driver->ops->hw_free(substream);
/* now free hw params for the DAIs */
if (codec_dai->driver->ops->hw_free)
codec_dai->driver->ops->hw_free(substream, codec_dai);
if (cpu_dai->driver->ops->hw_free)
cpu_dai->driver->ops->hw_free(substream, cpu_dai);
mutex_unlock(&pcm_mutex);
return 0;
}
static int soc_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct snd_soc_platform *platform = rtd->platform;
struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
struct snd_soc_dai *codec_dai = rtd->codec_dai;
int ret;
if (codec_dai->driver->ops->trigger) {
ret = codec_dai->driver->ops->trigger(substream, cmd, codec_dai);
if (ret < 0)
return ret;
}
if (platform->driver->ops->trigger) {
ret = platform->driver->ops->trigger(substream, cmd);
if (ret < 0)
return ret;
}
if (cpu_dai->driver->ops->trigger) {
ret = cpu_dai->driver->ops->trigger(substream, cmd, cpu_dai);
if (ret < 0)
return ret;
}
return 0;
}
/*
* soc level wrapper for pointer callback
* If cpu_dai, codec_dai, platform driver has the delay callback, than
* the runtime->delay will be updated accordingly.
*/
static snd_pcm_uframes_t soc_pcm_pointer(struct snd_pcm_substream *substream)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct snd_soc_platform *platform = rtd->platform;
struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
struct snd_soc_dai *codec_dai = rtd->codec_dai;
struct snd_pcm_runtime *runtime = substream->runtime;
snd_pcm_uframes_t offset = 0;
snd_pcm_sframes_t delay = 0;
if (platform->driver->ops->pointer)
offset = platform->driver->ops->pointer(substream);
if (cpu_dai->driver->ops->delay)
delay += cpu_dai->driver->ops->delay(substream, cpu_dai);
if (codec_dai->driver->ops->delay)
delay += codec_dai->driver->ops->delay(substream, codec_dai);
if (platform->driver->delay)
delay += platform->driver->delay(substream, codec_dai);
runtime->delay = delay;
return offset;
}
/* ASoC PCM operations */
static struct snd_pcm_ops soc_pcm_ops = {
.open = soc_pcm_open,
.close = soc_codec_close,
.hw_params = soc_pcm_hw_params,
.hw_free = soc_pcm_hw_free,
.prepare = soc_pcm_prepare,
.trigger = soc_pcm_trigger,
.pointer = soc_pcm_pointer,
};
#ifdef CONFIG_PM
/* powers down audio subsystem for suspend */
static int soc_suspend(struct device *dev)
{
struct platform_device *pdev = to_platform_device(dev);
struct snd_soc_card *card = platform_get_drvdata(pdev);
struct snd_soc_codec *codec;
int i;
/* If the initialization of this soc device failed, there is no codec
* associated with it. Just bail out in this case.
*/
if (list_empty(&card->codec_dev_list))
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++) {
struct snd_soc_dai *dai = card->rtd[i].codec_dai;
struct snd_soc_dai_driver *drv = dai->driver;
if (card->rtd[i].dai_link->ignore_suspend)
continue;
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(pdev, PMSG_SUSPEND);
for (i = 0; i < card->num_rtd; i++) {
struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
struct snd_soc_platform *platform = card->rtd[i].platform;
if (card->rtd[i].dai_link->ignore_suspend)
continue;
if (cpu_dai->driver->suspend && !cpu_dai->driver->ac97_control)
cpu_dai->driver->suspend(cpu_dai);
if (platform->driver->suspend && !platform->suspended) {
platform->driver->suspend(cpu_dai);
platform->suspended = 1;
}
}
/* close any waiting streams and save state */
for (i = 0; i < card->num_rtd; i++) {
run_delayed_work(&card->rtd[i].delayed_work);
card->rtd[i].codec->dapm.suspend_bias_level = card->rtd[i].codec->dapm.bias_level;
}
for (i = 0; i < card->num_rtd; i++) {
struct snd_soc_dai_driver *driver = card->rtd[i].codec_dai->driver;
if (card->rtd[i].dai_link->ignore_suspend)
continue;
if (driver->playback.stream_name != NULL)
snd_soc_dapm_stream_event(&card->rtd[i], driver->playback.stream_name,
SND_SOC_DAPM_STREAM_SUSPEND);
if (driver->capture.stream_name != NULL)
snd_soc_dapm_stream_event(&card->rtd[i], driver->capture.stream_name,
SND_SOC_DAPM_STREAM_SUSPEND);
}
/* 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 && codec->driver->suspend) {
switch (codec->dapm.bias_level) {
case SND_SOC_BIAS_STANDBY:
case SND_SOC_BIAS_OFF:
codec->driver->suspend(codec, PMSG_SUSPEND);
codec->suspended = 1;
break;
default:
dev_dbg(codec->dev, "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->ac97_control)
cpu_dai->driver->suspend(cpu_dai);
}
if (card->suspend_post)
card->suspend_post(pdev, PMSG_SUSPEND);
return 0;
}
/* 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 platform_device *pdev = to_platform_device(card->dev);
struct snd_soc_codec *codec;
int i;
/* our power state is still SNDRV_CTL_POWER_D3hot from suspend time,
* so userspace apps are blocked from touching us
*/
dev_dbg(card->dev, "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(pdev);
/* resume AC97 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->ac97_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->driver->resume && codec->suspended) {
switch (codec->dapm.bias_level) {
case SND_SOC_BIAS_STANDBY:
case SND_SOC_BIAS_OFF:
codec->driver->resume(codec);
codec->suspended = 0;
break;
default:
dev_dbg(codec->dev, "CODEC was on over suspend\n");
break;
}
}
}
for (i = 0; i < card->num_rtd; i++) {
struct snd_soc_dai_driver *driver = card->rtd[i].codec_dai->driver;
if (card->rtd[i].dai_link->ignore_suspend)
continue;
if (driver->playback.stream_name != NULL)
snd_soc_dapm_stream_event(&card->rtd[i], driver->playback.stream_name,
SND_SOC_DAPM_STREAM_RESUME);
if (driver->capture.stream_name != NULL)
snd_soc_dapm_stream_event(&card->rtd[i], driver->capture.stream_name,
SND_SOC_DAPM_STREAM_RESUME);
}
/* unmute any active DACs */
for (i = 0; i < card->num_rtd; i++) {
struct snd_soc_dai *dai = card->rtd[i].codec_dai;
struct snd_soc_dai_driver *drv = dai->driver;
if (card->rtd[i].dai_link->ignore_suspend)
continue;
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;
struct snd_soc_platform *platform = card->rtd[i].platform;
if (card->rtd[i].dai_link->ignore_suspend)
continue;
if (cpu_dai->driver->resume && !cpu_dai->driver->ac97_control)
cpu_dai->driver->resume(cpu_dai);
if (platform->driver->resume && platform->suspended) {
platform->driver->resume(cpu_dai);
platform->suspended = 0;
}
}
if (card->resume_post)
card->resume_post(pdev);
dev_dbg(card->dev, "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);
}
/* powers up audio subsystem after a suspend */
static int soc_resume(struct device *dev)
{
struct platform_device *pdev = to_platform_device(dev);
struct snd_soc_card *card = platform_get_drvdata(pdev);
int i;
/* AC97 devices 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;
if (cpu_dai->driver->ac97_control) {
dev_dbg(dev, "Resuming AC97 immediately\n");
soc_resume_deferred(&card->deferred_resume_work);
} else {
dev_dbg(dev, "Scheduling resume work\n");
if (!schedule_work(&card->deferred_resume_work))
dev_err(dev, "resume work item may be lost\n");
}
}
return 0;
}
#else
#define soc_suspend NULL
#define soc_resume NULL
#endif
static struct snd_soc_dai_ops null_dai_ops = {
};
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_codec *codec;
struct snd_soc_platform *platform;
struct snd_soc_dai *codec_dai, *cpu_dai;
if (rtd->complete)
return 1;
dev_dbg(card->dev, "binding %s at idx %d\n", dai_link->name, num);
/* do we already have the CPU DAI for this link ? */
if (rtd->cpu_dai) {
goto find_codec;
}
/* no, then find CPU DAI from registered DAIs*/
list_for_each_entry(cpu_dai, &dai_list, list) {
if (!strcmp(cpu_dai->name, dai_link->cpu_dai_name)) {
if (!try_module_get(cpu_dai->dev->driver->owner))
return -ENODEV;
rtd->cpu_dai = cpu_dai;
goto find_codec;
}
}
dev_dbg(card->dev, "CPU DAI %s not registered\n",
dai_link->cpu_dai_name);
find_codec:
/* do we already have the CODEC for this link ? */
if (rtd->codec) {
goto find_platform;
}
/* no, then find CODEC from registered CODECs*/
list_for_each_entry(codec, &codec_list, list) {
if (!strcmp(codec->name, dai_link->codec_name)) {
rtd->codec = codec;
if (!try_module_get(codec->dev->driver->owner))
return -ENODEV;
/* CODEC found, so find CODEC DAI from registered DAIs from this CODEC*/
list_for_each_entry(codec_dai, &dai_list, list) {
if (codec->dev == codec_dai->dev &&
!strcmp(codec_dai->name, dai_link->codec_dai_name)) {
rtd->codec_dai = codec_dai;
goto find_platform;
}
}
dev_dbg(card->dev, "CODEC DAI %s not registered\n",
dai_link->codec_dai_name);
goto find_platform;
}
}
dev_dbg(card->dev, "CODEC %s not registered\n",
dai_link->codec_name);
find_platform:
/* do we already have the CODEC DAI for this link ? */
if (rtd->platform) {
goto out;
}
/* no, then find CPU DAI from registered DAIs*/
list_for_each_entry(platform, &platform_list, list) {
if (!strcmp(platform->name, dai_link->platform_name)) {
if (!try_module_get(platform->dev->driver->owner))
return -ENODEV;
rtd->platform = platform;
goto out;
}
}
dev_dbg(card->dev, "platform %s not registered\n",
dai_link->platform_name);
return 0;
out:
/* mark rtd as complete if we found all 4 of our client devices */
if (rtd->codec && rtd->codec_dai && rtd->platform && rtd->cpu_dai) {
rtd->complete = 1;
card->num_rtd++;
}
return 1;
}
static void soc_remove_codec(struct snd_soc_codec *codec)
{
int err;
if (codec->driver->remove) {
err = codec->driver->remove(codec);
if (err < 0)
dev_err(codec->dev,
"asoc: failed to remove %s: %d\n",
codec->name, err);
}
/* Make sure all DAPM widgets are freed */
snd_soc_dapm_free(&codec->dapm);
soc_cleanup_codec_debugfs(codec);
codec->probed = 0;
list_del(&codec->card_list);
module_put(codec->dev->driver->owner);
}
static void soc_remove_dai_link(struct snd_soc_card *card, int num)
{
struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
struct snd_soc_codec *codec = rtd->codec;
struct snd_soc_platform *platform = rtd->platform;
struct snd_soc_dai *codec_dai = rtd->codec_dai, *cpu_dai = rtd->cpu_dai;
int err;
/* unregister the rtd device */
if (rtd->dev_registered) {
device_remove_file(&rtd->dev, &dev_attr_pmdown_time);
device_remove_file(&rtd->dev, &dev_attr_codec_reg);
device_unregister(&rtd->dev);
rtd->dev_registered = 0;
}
/* remove the CODEC DAI */
if (codec_dai && codec_dai->probed) {
if (codec_dai->driver->remove) {
err = codec_dai->driver->remove(codec_dai);
if (err < 0)
printk(KERN_ERR "asoc: failed to remove %s\n", codec_dai->name);
}
codec_dai->probed = 0;
list_del(&codec_dai->card_list);
}
/* remove the platform */
if (platform && platform->probed) {
if (platform->driver->remove) {
err = platform->driver->remove(platform);
if (err < 0)
printk(KERN_ERR "asoc: failed to remove %s\n", platform->name);
}
platform->probed = 0;
list_del(&platform->card_list);
module_put(platform->dev->driver->owner);
}
/* remove the CODEC */
if (codec && codec->probed)
soc_remove_codec(codec);
/* remove the cpu_dai */
if (cpu_dai && cpu_dai->probed) {
if (cpu_dai->driver->remove) {
err = cpu_dai->driver->remove(cpu_dai);
if (err < 0)
printk(KERN_ERR "asoc: failed to remove %s\n", cpu_dai->name);
}
cpu_dai->probed = 0;
list_del(&cpu_dai->card_list);
module_put(cpu_dai->dev->driver->owner);
}
}
static void soc_set_name_prefix(struct snd_soc_card *card,
struct snd_soc_codec *codec)
{
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->dev_name && !strcmp(codec->name, map->dev_name)) {
codec->name_prefix = map->name_prefix;
break;
}
}
}
static int soc_probe_codec(struct snd_soc_card *card,
struct snd_soc_codec *codec)
{
int ret = 0;
codec->card = card;
codec->dapm.card = card;
soc_set_name_prefix(card, codec);
if (codec->driver->probe) {
ret = codec->driver->probe(codec);
if (ret < 0) {
dev_err(codec->dev,
"asoc: failed to probe CODEC %s: %d\n",
codec->name, ret);
return ret;
}
}
soc_init_codec_debugfs(codec);
/* mark codec as probed and add to card codec list */
codec->probed = 1;
list_add(&codec->card_list, &card->codec_dev_list);
return ret;
}
static void rtd_release(struct device *dev) {}
static int soc_post_component_init(struct snd_soc_card *card,
struct snd_soc_codec *codec,
int num, int dailess)
{
struct snd_soc_dai_link *dai_link = NULL;
struct snd_soc_aux_dev *aux_dev = NULL;
struct snd_soc_pcm_runtime *rtd;
const char *temp, *name;
int ret = 0;
if (!dailess) {
dai_link = &card->dai_link[num];
rtd = &card->rtd[num];
name = dai_link->name;
} else {
aux_dev = &card->aux_dev[num];
rtd = &card->rtd_aux[num];
name = aux_dev->name;
}
/* machine controls, routes and widgets are not prefixed */
temp = codec->name_prefix;
codec->name_prefix = NULL;
/* do machine specific initialization */
if (!dailess && dai_link->init)
ret = dai_link->init(rtd);
else if (dailess && aux_dev->init)
ret = aux_dev->init(&codec->dapm);
if (ret < 0) {
dev_err(card->dev, "asoc: failed to init %s: %d\n", name, ret);
return ret;
}
codec->name_prefix = temp;
/* Make sure all DAPM widgets are instantiated */
snd_soc_dapm_new_widgets(&codec->dapm);
snd_soc_dapm_sync(&codec->dapm);
/* register the rtd device */
rtd->codec = codec;
rtd->card = card;
rtd->dev.parent = card->dev;
rtd->dev.release = rtd_release;
rtd->dev.init_name = name;
ret = device_register(&rtd->dev);
if (ret < 0) {
dev_err(card->dev,
"asoc: failed to register runtime device: %d\n", ret);
return ret;
}
rtd->dev_registered = 1;
/* add DAPM sysfs entries for this codec */
ret = snd_soc_dapm_sys_add(&rtd->dev);
if (ret < 0)
dev_err(codec->dev,
"asoc: failed to add codec dapm sysfs entries: %d\n",
ret);
/* add codec sysfs entries */
ret = device_create_file(&rtd->dev, &dev_attr_codec_reg);
if (ret < 0)
dev_err(codec->dev,
"asoc: failed to add codec sysfs files: %d\n", ret);
return 0;
}
static int soc_probe_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_codec *codec = rtd->codec;
struct snd_soc_platform *platform = rtd->platform;
struct snd_soc_dai *codec_dai = rtd->codec_dai, *cpu_dai = rtd->cpu_dai;
int ret;
dev_dbg(card->dev, "probe %s dai link %d\n", card->name, num);
/* config components */
codec_dai->codec = codec;
cpu_dai->platform = platform;
codec_dai->card = card;
cpu_dai->card = card;
/* set default power off timeout */
rtd->pmdown_time = pmdown_time;
/* probe the cpu_dai */
if (!cpu_dai->probed) {
if (cpu_dai->driver->probe) {
ret = cpu_dai->driver->probe(cpu_dai);
if (ret < 0) {
printk(KERN_ERR "asoc: failed to probe CPU DAI %s\n",
cpu_dai->name);
return ret;
}
}
cpu_dai->probed = 1;
/* mark cpu_dai as probed and add to card cpu_dai list */
list_add(&cpu_dai->card_list, &card->dai_dev_list);
}
/* probe the CODEC */
if (!codec->probed) {
ret = soc_probe_codec(card, codec);
if (ret < 0)
return ret;
}
/* probe the platform */
if (!platform->probed) {
if (platform->driver->probe) {
ret = platform->driver->probe(platform);
if (ret < 0) {
printk(KERN_ERR "asoc: failed to probe platform %s\n",
platform->name);
return ret;
}
}
/* mark platform as probed and add to card platform list */
platform->probed = 1;
list_add(&platform->card_list, &card->platform_dev_list);
}
/* probe the CODEC DAI */
if (!codec_dai->probed) {
if (codec_dai->driver->probe) {
ret = codec_dai->driver->probe(codec_dai);
if (ret < 0) {
printk(KERN_ERR "asoc: failed to probe CODEC DAI %s\n",
codec_dai->name);
return ret;
}
}
/* mark cpu_dai as probed and add to card cpu_dai list */
codec_dai->probed = 1;
list_add(&codec_dai->card_list, &card->dai_dev_list);
}
/* DAPM dai link stream work */
INIT_DELAYED_WORK(&rtd->delayed_work, close_delayed_work);
ret = soc_post_component_init(card, codec, num, 0);
if (ret)
return ret;
ret = device_create_file(&rtd->dev, &dev_attr_pmdown_time);
if (ret < 0)
printk(KERN_WARNING "asoc: failed to add pmdown_time sysfs\n");
/* create the pcm */
ret = soc_new_pcm(rtd, num);
if (ret < 0) {
printk(KERN_ERR "asoc: can't create pcm %s\n", dai_link->stream_name);
return ret;
}
/* add platform data for AC97 devices */
if (rtd->codec_dai->driver->ac97_control)
snd_ac97_dev_add_pdata(codec->ac97, rtd->cpu_dai->ac97_pdata);
return 0;
}
#ifdef CONFIG_SND_SOC_AC97_BUS
static int soc_register_ac97_dai_link(struct snd_soc_pcm_runtime *rtd)
{
int ret;
/* Only instantiate AC97 if not already done by the adaptor
* for the generic AC97 subsystem.
*/
if (rtd->codec_dai->driver->ac97_control && !rtd->codec->ac97_registered) {
/*
* It is possible that the AC97 device is already registered to
* the device subsystem. This happens when the device is created
* via snd_ac97_mixer(). Currently only SoC codec that does so
* is the generic AC97 glue but others migh emerge.
*
* In those cases we don't try to register the device again.
*/
if (!rtd->codec->ac97_created)
return 0;
ret = soc_ac97_dev_register(rtd->codec);
if (ret < 0) {
printk(KERN_ERR "asoc: AC97 device register failed\n");
return ret;
}
rtd->codec->ac97_registered = 1;
}
return 0;
}
static void soc_unregister_ac97_dai_link(struct snd_soc_codec *codec)
{
if (codec->ac97_registered) {
soc_ac97_dev_unregister(codec);
codec->ac97_registered = 0;
}
}
#endif
static int soc_probe_aux_dev(struct snd_soc_card *card, int num)
{
struct snd_soc_aux_dev *aux_dev = &card->aux_dev[num];
struct snd_soc_codec *codec;
int ret = -ENODEV;
/* find CODEC from registered CODECs*/
list_for_each_entry(codec, &codec_list, list) {
if (!strcmp(codec->name, aux_dev->codec_name)) {
if (codec->probed) {
dev_err(codec->dev,
"asoc: codec already probed");
ret = -EBUSY;
goto out;
}
goto found;
}
}
/* codec not found */
dev_err(card->dev, "asoc: codec %s not found", aux_dev->codec_name);
goto out;
found:
if (!try_module_get(codec->dev->driver->owner))
return -ENODEV;
ret = soc_probe_codec(card, codec);
if (ret < 0)
return ret;
ret = soc_post_component_init(card, codec, num, 1);
out:
return ret;
}
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_codec *codec = rtd->codec;
/* unregister the rtd device */
if (rtd->dev_registered) {
device_remove_file(&rtd->dev, &dev_attr_codec_reg);
device_unregister(&rtd->dev);
rtd->dev_registered = 0;
}
if (codec && codec->probed)
soc_remove_codec(codec);
}
static int snd_soc_init_codec_cache(struct snd_soc_codec *codec,
enum snd_soc_compress_type compress_type)
{
int ret;
if (codec->cache_init)
return 0;
/* override the compress_type if necessary */
if (compress_type && codec->compress_type != compress_type)
codec->compress_type = compress_type;
ret = snd_soc_cache_init(codec);
if (ret < 0) {
dev_err(codec->dev, "Failed to set cache compression type: %d\n",
ret);
return ret;
}
codec->cache_init = 1;
return 0;
}
static void snd_soc_instantiate_card(struct snd_soc_card *card)
{
struct platform_device *pdev = to_platform_device(card->dev);
struct snd_soc_codec *codec;
struct snd_soc_codec_conf *codec_conf;
enum snd_soc_compress_type compress_type;
int ret, i;
mutex_lock(&card->mutex);
if (card->instantiated) {
mutex_unlock(&card->mutex);
return;
}
/* bind DAIs */
for (i = 0; i < card->num_links; i++)
soc_bind_dai_link(card, i);
/* bind completed ? */
if (card->num_rtd != card->num_links) {
mutex_unlock(&card->mutex);
return;
}
/* initialize the register cache for each available codec */
list_for_each_entry(codec, &codec_list, list) {
if (codec->cache_init)
continue;
/* check to see if we need to override the compress_type */
for (i = 0; i < card->num_configs; ++i) {
codec_conf = &card->codec_conf[i];
if (!strcmp(codec->name, codec_conf->dev_name)) {
compress_type = codec_conf->compress_type;
if (compress_type && compress_type
!= codec->compress_type)
break;
}
}
if (i == card->num_configs) {
/* no need to override the compress_type so
* go ahead and do the standard thing */
ret = snd_soc_init_codec_cache(codec, 0);
if (ret < 0) {
mutex_unlock(&card->mutex);
return;
}
continue;
}
/* override the compress_type with the one supplied in
* the machine driver */
ret = snd_soc_init_codec_cache(codec, compress_type);
if (ret < 0) {
mutex_unlock(&card->mutex);
return;
}
}
/* card bind complete so register a sound card */
ret = snd_card_create(SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1,
card->owner, 0, &card->snd_card);
if (ret < 0) {
printk(KERN_ERR "asoc: can't create sound card for card %s\n",
card->name);
mutex_unlock(&card->mutex);
return;
}
card->snd_card->dev = card->dev;
#ifdef CONFIG_PM
/* deferred resume work */
INIT_WORK(&card->deferred_resume_work, soc_resume_deferred);
#endif
/* initialise the sound card only once */
if (card->probe) {
ret = card->probe(pdev);
if (ret < 0)
goto card_probe_error;
}
for (i = 0; i < card->num_links; i++) {
ret = soc_probe_dai_link(card, i);
if (ret < 0) {
pr_err("asoc: failed to instantiate card %s: %d\n",
card->name, ret);
goto probe_dai_err;
}
}
for (i = 0; i < card->num_aux_devs; i++) {
ret = soc_probe_aux_dev(card, i);
if (ret < 0) {
pr_err("asoc: failed to add auxiliary devices %s: %d\n",
card->name, ret);
goto probe_aux_dev_err;
}
}
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->name);
ret = snd_card_register(card->snd_card);
if (ret < 0) {
printk(KERN_ERR "asoc: failed to register soundcard for %s\n", card->name);
goto probe_aux_dev_err;
}
#ifdef CONFIG_SND_SOC_AC97_BUS
/* register any AC97 codecs */
for (i = 0; i < card->num_rtd; i++) {
ret = soc_register_ac97_dai_link(&card->rtd[i]);
if (ret < 0) {
printk(KERN_ERR "asoc: failed to register AC97 %s\n", card->name);
while (--i >= 0)
soc_unregister_ac97_dai_link(&card->rtd[i]);
goto probe_aux_dev_err;
}
}
#endif
card->instantiated = 1;
mutex_unlock(&card->mutex);
return;
probe_aux_dev_err:
for (i = 0; i < card->num_aux_devs; i++)
soc_remove_aux_dev(card, i);
probe_dai_err:
for (i = 0; i < card->num_links; i++)
soc_remove_dai_link(card, i);
card_probe_error:
if (card->remove)
card->remove(pdev);
snd_card_free(card->snd_card);
mutex_unlock(&card->mutex);
}
/*
* Attempt to initialise any uninitialised cards. Must be called with
* client_mutex.
*/
static void snd_soc_instantiate_cards(void)
{
struct snd_soc_card *card;
list_for_each_entry(card, &card_list, list)
snd_soc_instantiate_card(card);
}
/* probes a new socdev */
static int soc_probe(struct platform_device *pdev)
{
struct snd_soc_card *card = platform_get_drvdata(pdev);
int ret = 0;
/* Bodge while we unpick instantiation */
card->dev = &pdev->dev;
INIT_LIST_HEAD(&card->dai_dev_list);
INIT_LIST_HEAD(&card->codec_dev_list);
INIT_LIST_HEAD(&card->platform_dev_list);
soc_init_card_debugfs(card);
ret = snd_soc_register_card(card);
if (ret != 0) {
dev_err(&pdev->dev, "Failed to register card\n");
return ret;
}
return 0;
}
/* removes a socdev */
static int soc_remove(struct platform_device *pdev)
{
struct snd_soc_card *card = platform_get_drvdata(pdev);
int i;
if (card->instantiated) {
/* make sure any delayed work runs */
for (i = 0; i < card->num_rtd; i++) {
struct snd_soc_pcm_runtime *rtd = &card->rtd[i];
run_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 */
for (i = 0; i < card->num_rtd; i++)
soc_remove_dai_link(card, i);
soc_cleanup_card_debugfs(card);
/* remove the card */
if (card->remove)
card->remove(pdev);
kfree(card->rtd);
snd_card_free(card->snd_card);
}
snd_soc_unregister_card(card);
return 0;
}
static int soc_poweroff(struct device *dev)
{
struct platform_device *pdev = to_platform_device(dev);
struct snd_soc_card *card = platform_get_drvdata(pdev);
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];
run_delayed_work(&rtd->delayed_work);
}
snd_soc_dapm_shutdown(card);
return 0;
}
static const struct dev_pm_ops soc_pm_ops = {
.suspend = soc_suspend,
.resume = soc_resume,
.poweroff = soc_poweroff,
};
/* ASoC platform driver */
static struct platform_driver soc_driver = {
.driver = {
.name = "soc-audio",
.owner = THIS_MODULE,
.pm = &soc_pm_ops,
},
.probe = soc_probe,
.remove = soc_remove,
};
/* create a new pcm */
static int soc_new_pcm(struct snd_soc_pcm_runtime *rtd, int num)
{
struct snd_soc_codec *codec = rtd->codec;
struct snd_soc_platform *platform = rtd->platform;
struct snd_soc_dai *codec_dai = rtd->codec_dai;
struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
struct snd_pcm *pcm;
char new_name[64];
int ret = 0, playback = 0, capture = 0;
/* check client and interface hw capabilities */
snprintf(new_name, sizeof(new_name), "%s %s-%d",
rtd->dai_link->stream_name, codec_dai->name, num);
if (codec_dai->driver->playback.channels_min)
playback = 1;
if (codec_dai->driver->capture.channels_min)
capture = 1;
dev_dbg(rtd->card->dev, "registered pcm #%d %s\n",num,new_name);
ret = snd_pcm_new(rtd->card->snd_card, new_name,
num, playback, capture, &pcm);
if (ret < 0) {
printk(KERN_ERR "asoc: can't create pcm for codec %s\n", codec->name);
return ret;
}
rtd->pcm = pcm;
pcm->private_data = rtd;
soc_pcm_ops.mmap = platform->driver->ops->mmap;
soc_pcm_ops.pointer = platform->driver->ops->pointer;
soc_pcm_ops.ioctl = platform->driver->ops->ioctl;
soc_pcm_ops.copy = platform->driver->ops->copy;
soc_pcm_ops.silence = platform->driver->ops->silence;
soc_pcm_ops.ack = platform->driver->ops->ack;
soc_pcm_ops.page = platform->driver->ops->page;
if (playback)
snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &soc_pcm_ops);
if (capture)
snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &soc_pcm_ops);
ret = platform->driver->pcm_new(rtd->card->snd_card, codec_dai, pcm);
if (ret < 0) {
printk(KERN_ERR "asoc: platform pcm constructor failed\n");
return ret;
}
pcm->private_free = platform->driver->pcm_free;
printk(KERN_INFO "asoc: %s <-> %s mapping ok\n", codec_dai->name,
cpu_dai->name);
return ret;
}
/**
* snd_soc_codec_volatile_register: Report if a register is volatile.
*
* @codec: CODEC to query.
* @reg: Register to query.
*
* Boolean function indiciating if a CODEC register is volatile.
*/
int snd_soc_codec_volatile_register(struct snd_soc_codec *codec, int reg)
{
if (codec->driver->volatile_register)
return codec->driver->volatile_register(reg);
else
return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_codec_volatile_register);
/**
* snd_soc_new_ac97_codec - initailise AC97 device
* @codec: audio codec
* @ops: AC97 bus operations
* @num: AC97 codec number
*
* Initialises AC97 codec resources for use by ad-hoc devices only.
*/
int snd_soc_new_ac97_codec(struct snd_soc_codec *codec,
struct snd_ac97_bus_ops *ops, int num)
{
mutex_lock(&codec->mutex);
codec->ac97 = kzalloc(sizeof(struct snd_ac97), GFP_KERNEL);
if (codec->ac97 == NULL) {
mutex_unlock(&codec->mutex);
return -ENOMEM;
}
codec->ac97->bus = kzalloc(sizeof(struct snd_ac97_bus), GFP_KERNEL);
if (codec->ac97->bus == NULL) {
kfree(codec->ac97);
codec->ac97 = NULL;
mutex_unlock(&codec->mutex);
return -ENOMEM;
}
codec->ac97->bus->ops = ops;
codec->ac97->num = num;
/*
* Mark the AC97 device to be created by us. This way we ensure that the
* device will be registered with the device subsystem later on.
*/
codec->ac97_created = 1;
mutex_unlock(&codec->mutex);
return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_new_ac97_codec);
/**
* snd_soc_free_ac97_codec - free AC97 codec device
* @codec: audio codec
*
* Frees AC97 codec device resources.
*/
void snd_soc_free_ac97_codec(struct snd_soc_codec *codec)
{
mutex_lock(&codec->mutex);
#ifdef CONFIG_SND_SOC_AC97_BUS
soc_unregister_ac97_dai_link(codec);
#endif
kfree(codec->ac97->bus);
kfree(codec->ac97);
codec->ac97 = NULL;
codec->ac97_created = 0;
mutex_unlock(&codec->mutex);
}
EXPORT_SYMBOL_GPL(snd_soc_free_ac97_codec);
unsigned int snd_soc_read(struct snd_soc_codec *codec, unsigned int reg)
{
unsigned int ret;
ret = codec->read(codec, reg);
dev_dbg(codec->dev, "read %x => %x\n", reg, ret);
trace_snd_soc_reg_read(codec, reg, ret);
return ret;
}
EXPORT_SYMBOL_GPL(snd_soc_read);
unsigned int snd_soc_write(struct snd_soc_codec *codec,
unsigned int reg, unsigned int val)
{
dev_dbg(codec->dev, "write %x = %x\n", reg, val);
trace_snd_soc_reg_write(codec, reg, val);
return codec->write(codec, reg, val);
}
EXPORT_SYMBOL_GPL(snd_soc_write);
/**
* snd_soc_update_bits - update codec register bits
* @codec: audio codec
* @reg: codec register
* @mask: register mask
* @value: new value
*
* Writes new register value.
*
* Returns 1 for change else 0.
*/
int snd_soc_update_bits(struct snd_soc_codec *codec, unsigned short reg,
unsigned int mask, unsigned int value)
{
int change;
unsigned int old, new;
old = snd_soc_read(codec, reg);
new = (old & ~mask) | value;
change = old != new;
if (change)
snd_soc_write(codec, reg, new);
return change;
}
EXPORT_SYMBOL_GPL(snd_soc_update_bits);
/**
* snd_soc_update_bits_locked - update codec register bits
* @codec: audio codec
* @reg: codec register
* @mask: register mask
* @value: new value
*
* Writes new register value, and takes the codec mutex.
*
* Returns 1 for change else 0.
*/
int snd_soc_update_bits_locked(struct snd_soc_codec *codec,
unsigned short reg, unsigned int mask,
unsigned int value)
{
int change;
mutex_lock(&codec->mutex);
change = snd_soc_update_bits(codec, reg, mask, value);
mutex_unlock(&codec->mutex);
return change;
}
EXPORT_SYMBOL_GPL(snd_soc_update_bits_locked);
/**
* snd_soc_test_bits - test register for change
* @codec: audio codec
* @reg: codec register
* @mask: register mask
* @value: new value
*
* Tests a register with a new value and checks if the new value is
* different from the old value.
*
* Returns 1 for change else 0.
*/
int snd_soc_test_bits(struct snd_soc_codec *codec, unsigned short reg,
unsigned int mask, unsigned int value)
{
int change;
unsigned int old, new;
old = snd_soc_read(codec, reg);
new = (old & ~mask) | value;
change = old != new;
return change;
}
EXPORT_SYMBOL_GPL(snd_soc_test_bits);
/**
* snd_soc_set_runtime_hwparams - set the runtime hardware parameters
* @substream: the pcm substream
* @hw: the hardware parameters
*
* Sets the substream runtime hardware parameters.
*/
int snd_soc_set_runtime_hwparams(struct snd_pcm_substream *substream,
const struct snd_pcm_hardware *hw)
{
struct snd_pcm_runtime *runtime = substream->runtime;
runtime->hw.info = hw->info;
runtime->hw.formats = hw->formats;
runtime->hw.period_bytes_min = hw->period_bytes_min;
runtime->hw.period_bytes_max = hw->period_bytes_max;
runtime->hw.periods_min = hw->periods_min;
runtime->hw.periods_max = hw->periods_max;
runtime->hw.buffer_bytes_max = hw->buffer_bytes_max;
runtime->hw.fifo_size = hw->fifo_size;
return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_set_runtime_hwparams);
/**
* snd_soc_cnew - create new control
* @_template: control template
* @data: control private data
* @long_name: control long name
*
* 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, char *long_name)
{
struct snd_kcontrol_new template;
memcpy(&template, _template, sizeof(template));
if (long_name)
template.name = long_name;
template.index = 0;
return snd_ctl_new1(&template, data);
}
EXPORT_SYMBOL_GPL(snd_soc_cnew);
/**
* snd_soc_add_controls - add an array of controls to a codec.
* Convienience 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_controls(struct snd_soc_codec *codec,
const struct snd_kcontrol_new *controls, int num_controls)
{
struct snd_card *card = codec->card->snd_card;
char prefixed_name[44], *name;
int err, i;
for (i = 0; i < num_controls; i++) {
const struct snd_kcontrol_new *control = &controls[i];
if (codec->name_prefix) {
snprintf(prefixed_name, sizeof(prefixed_name), "%s %s",
codec->name_prefix, control->name);
name = prefixed_name;
} else {
name = control->name;
}
err = snd_ctl_add(card, snd_soc_cnew(control, codec, name));
if (err < 0) {
dev_err(codec->dev, "%s: Failed to add %s: %d\n",
codec->name, name, err);
return err;
}
}
return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_add_controls);
/**
* snd_soc_info_enum_double - enumerated double mixer info callback
* @kcontrol: mixer control
* @uinfo: control element information
*
* Callback to provide information about a double enumerated
* mixer control.
*
* Returns 0 for success.
*/
int snd_soc_info_enum_double(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_info *uinfo)
{
struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
uinfo->count = e->shift_l == e->shift_r ? 1 : 2;
uinfo->value.enumerated.items = e->max;
if (uinfo->value.enumerated.item > e->max - 1)
uinfo->value.enumerated.item = e->max - 1;
strcpy(uinfo->value.enumerated.name,
e->texts[uinfo->value.enumerated.item]);
return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_info_enum_double);
/**
* snd_soc_get_enum_double - enumerated double mixer get callback
* @kcontrol: mixer control
* @ucontrol: control element information
*
* Callback to get the value of a double enumerated mixer.
*
* Returns 0 for success.
*/
int snd_soc_get_enum_double(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
unsigned int val, bitmask;
for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
;
val = snd_soc_read(codec, e->reg);
ucontrol->value.enumerated.item[0]
= (val >> e->shift_l) & (bitmask - 1);
if (e->shift_l != e->shift_r)
ucontrol->value.enumerated.item[1] =
(val >> e->shift_r) & (bitmask - 1);
return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_get_enum_double);
/**
* snd_soc_put_enum_double - enumerated double mixer put callback
* @kcontrol: mixer control
* @ucontrol: control element information
*
* Callback to set the value of a double enumerated mixer.
*
* Returns 0 for success.
*/
int snd_soc_put_enum_double(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
unsigned int val;
unsigned int mask, bitmask;
for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
;
if (ucontrol->value.enumerated.item[0] > e->max - 1)
return -EINVAL;
val = ucontrol->value.enumerated.item[0] << e->shift_l;
mask = (bitmask - 1) << e->shift_l;
if (e->shift_l != e->shift_r) {
if (ucontrol->value.enumerated.item[1] > e->max - 1)
return -EINVAL;
val |= ucontrol->value.enumerated.item[1] << e->shift_r;
mask |= (bitmask - 1) << e->shift_r;
}
return snd_soc_update_bits_locked(codec, e->reg, mask, val);
}
EXPORT_SYMBOL_GPL(snd_soc_put_enum_double);
/**
* snd_soc_get_value_enum_double - semi enumerated double mixer get callback
* @kcontrol: mixer control
* @ucontrol: control element information
*
* Callback to get the value of a double semi enumerated mixer.
*
* Semi enumerated mixer: the enumerated items are referred as values. Can be
* used for handling bitfield coded enumeration for example.
*
* Returns 0 for success.
*/
int snd_soc_get_value_enum_double(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
unsigned int reg_val, val, mux;
reg_val = snd_soc_read(codec, e->reg);
val = (reg_val >> e->shift_l) & e->mask;
for (mux = 0; mux < e->max; mux++) {
if (val == e->values[mux])
break;
}
ucontrol->value.enumerated.item[0] = mux;
if (e->shift_l != e->shift_r) {
val = (reg_val >> e->shift_r) & e->mask;
for (mux = 0; mux < e->max; mux++) {
if (val == e->values[mux])
break;
}
ucontrol->value.enumerated.item[1] = mux;
}
return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_get_value_enum_double);
/**
* snd_soc_put_value_enum_double - semi enumerated double mixer put callback
* @kcontrol: mixer control
* @ucontrol: control element information
*
* Callback to set the value of a double semi enumerated mixer.
*
* Semi enumerated mixer: the enumerated items are referred as values. Can be
* used for handling bitfield coded enumeration for example.
*
* Returns 0 for success.
*/
int snd_soc_put_value_enum_double(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
unsigned int val;
unsigned int mask;
if (ucontrol->value.enumerated.item[0] > e->max - 1)
return -EINVAL;
val = e->values[ucontrol->value.enumerated.item[0]] << e->shift_l;
mask = e->mask << e->shift_l;
if (e->shift_l != e->shift_r) {
if (ucontrol->value.enumerated.item[1] > e->max - 1)
return -EINVAL;
val |= e->values[ucontrol->value.enumerated.item[1]] << e->shift_r;
mask |= e->mask << e->shift_r;
}
return snd_soc_update_bits_locked(codec, e->reg, mask, val);
}
EXPORT_SYMBOL_GPL(snd_soc_put_value_enum_double);
/**
* snd_soc_info_enum_ext - external enumerated single mixer info callback
* @kcontrol: mixer control
* @uinfo: control element information
*
* Callback to provide information about an external enumerated
* single mixer.
*
* Returns 0 for success.
*/
int snd_soc_info_enum_ext(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_info *uinfo)
{
struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
uinfo->count = 1;
uinfo->value.enumerated.items = e->max;
if (uinfo->value.enumerated.item > e->max - 1)
uinfo->value.enumerated.item = e->max - 1;
strcpy(uinfo->value.enumerated.name,
e->texts[uinfo->value.enumerated.item]);
return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_info_enum_ext);
/**
* snd_soc_info_volsw_ext - external single mixer info callback
* @kcontrol: mixer control
* @uinfo: control element information
*
* Callback to provide information about a single external mixer control.
*
* Returns 0 for success.
*/
int snd_soc_info_volsw_ext(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_info *uinfo)
{
int max = kcontrol->private_value;
if (max == 1 && !strstr(kcontrol->id.name, " Volume"))
uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
else
uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
uinfo->count = 1;
uinfo->value.integer.min = 0;
uinfo->value.integer.max = max;
return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_info_volsw_ext);
/**
* snd_soc_info_volsw - single mixer info callback
* @kcontrol: mixer control
* @uinfo: control element information
*
* Callback to provide information about a single mixer control.
*
* Returns 0 for success.
*/
int snd_soc_info_volsw(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_info *uinfo)
{
struct soc_mixer_control *mc =
(struct soc_mixer_control *)kcontrol->private_value;
int platform_max;
unsigned int shift = mc->shift;
unsigned int rshift = mc->rshift;
if (!mc->platform_max)
mc->platform_max = mc->max;
platform_max = mc->platform_max;
if (platform_max == 1 && !strstr(kcontrol->id.name, " Volume"))
uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
else
uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
uinfo->count = shift == rshift ? 1 : 2;
uinfo->value.integer.min = 0;
uinfo->value.integer.max = platform_max;
return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_info_volsw);
/**
* snd_soc_get_volsw - single mixer get callback
* @kcontrol: mixer control
* @ucontrol: control element information
*
* Callback to get the value of a single mixer control.
*
* Returns 0 for success.
*/
int snd_soc_get_volsw(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct soc_mixer_control *mc =
(struct soc_mixer_control *)kcontrol->private_value;
struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
unsigned int reg = mc->reg;
unsigned int shift = mc->shift;
unsigned int rshift = mc->rshift;
int max = mc->max;
unsigned int mask = (1 << fls(max)) - 1;
unsigned int invert = mc->invert;
ucontrol->value.integer.value[0] =
(snd_soc_read(codec, reg) >> shift) & mask;
if (shift != rshift)
ucontrol->value.integer.value[1] =
(snd_soc_read(codec, reg) >> rshift) & mask;
if (invert) {
ucontrol->value.integer.value[0] =
max - ucontrol->value.integer.value[0];
if (shift != rshift)
ucontrol->value.integer.value[1] =
max - ucontrol->value.integer.value[1];
}
return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_get_volsw);
/**
* snd_soc_put_volsw - single mixer put callback
* @kcontrol: mixer control
* @ucontrol: control element information
*
* Callback to set the value of a single mixer control.
*
* Returns 0 for success.
*/
int snd_soc_put_volsw(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct soc_mixer_control *mc =
(struct soc_mixer_control *)kcontrol->private_value;
struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
unsigned int reg = mc->reg;
unsigned int shift = mc->shift;
unsigned int rshift = mc->rshift;
int max = mc->max;
unsigned int mask = (1 << fls(max)) - 1;
unsigned int invert = mc->invert;
unsigned int val, val2, val_mask;
val = (ucontrol->value.integer.value[0] & mask);
if (invert)
val = max - val;
val_mask = mask << shift;
val = val << shift;
if (shift != rshift) {
val2 = (ucontrol->value.integer.value[1] & mask);
if (invert)
val2 = max - val2;
val_mask |= mask << rshift;
val |= val2 << rshift;
}
return snd_soc_update_bits_locked(codec, reg, val_mask, val);
}
EXPORT_SYMBOL_GPL(snd_soc_put_volsw);
/**
* snd_soc_info_volsw_2r - double mixer info callback
* @kcontrol: mixer control
* @uinfo: control element information
*
* Callback to provide information about a double mixer control that
* spans 2 codec registers.
*
* Returns 0 for success.
*/
int snd_soc_info_volsw_2r(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_info *uinfo)
{
struct soc_mixer_control *mc =
(struct soc_mixer_control *)kcontrol->private_value;
int platform_max;
if (!mc->platform_max)
mc->platform_max = mc->max;
platform_max = mc->platform_max;
if (platform_max == 1 && !strstr(kcontrol->id.name, " Volume"))
uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
else
uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
uinfo->count = 2;
uinfo->value.integer.min = 0;
uinfo->value.integer.max = platform_max;
return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_info_volsw_2r);
/**
* snd_soc_get_volsw_2r - double mixer get callback
* @kcontrol: mixer control
* @ucontrol: control element information
*
* Callback to get the value of a double mixer control that spans 2 registers.
*
* Returns 0 for success.
*/
int snd_soc_get_volsw_2r(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct soc_mixer_control *mc =
(struct soc_mixer_control *)kcontrol->private_value;
struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
unsigned int reg = mc->reg;
unsigned int reg2 = mc->rreg;
unsigned int shift = mc->shift;
int max = mc->max;
unsigned int mask = (1 << fls(max)) - 1;
unsigned int invert = mc->invert;
ucontrol->value.integer.value[0] =
(snd_soc_read(codec, reg) >> shift) & mask;
ucontrol->value.integer.value[1] =
(snd_soc_read(codec, reg2) >> shift) & mask;
if (invert) {
ucontrol->value.integer.value[0] =
max - ucontrol->value.integer.value[0];
ucontrol->value.integer.value[1] =
max - ucontrol->value.integer.value[1];
}
return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_get_volsw_2r);
/**
* snd_soc_put_volsw_2r - double mixer set callback
* @kcontrol: mixer control
* @ucontrol: control element information
*
* Callback to set the value of a double mixer control that spans 2 registers.
*
* Returns 0 for success.
*/
int snd_soc_put_volsw_2r(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct soc_mixer_control *mc =
(struct soc_mixer_control *)kcontrol->private_value;
struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
unsigned int reg = mc->reg;
unsigned int reg2 = mc->rreg;
unsigned int shift = mc->shift;
int max = mc->max;
unsigned int mask = (1 << fls(max)) - 1;
unsigned int invert = mc->invert;
int err;
unsigned int val, val2, val_mask;
val_mask = mask << shift;
val = (ucontrol->value.integer.value[0] & mask);
val2 = (ucontrol->value.integer.value[1] & mask);
if (invert) {
val = max - val;
val2 = max - val2;
}
val = val << shift;
val2 = val2 << shift;
err = snd_soc_update_bits_locked(codec, reg, val_mask, val);
if (err < 0)
return err;
err = snd_soc_update_bits_locked(codec, reg2, val_mask, val2);
return err;
}
EXPORT_SYMBOL_GPL(snd_soc_put_volsw_2r);
/**
* snd_soc_info_volsw_s8 - signed mixer info callback
* @kcontrol: mixer control
* @uinfo: control element information
*
* Callback to provide information about a signed mixer control.
*
* Returns 0 for success.
*/
int snd_soc_info_volsw_s8(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_info *uinfo)
{
struct soc_mixer_control *mc =
(struct soc_mixer_control *)kcontrol->private_value;
int platform_max;
int min = mc->min;
if (!mc->platform_max)
mc->platform_max = mc->max;
platform_max = mc->platform_max;
uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
uinfo->count = 2;
uinfo->value.integer.min = 0;
uinfo->value.integer.max = platform_max - min;
return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_info_volsw_s8);
/**
* snd_soc_get_volsw_s8 - signed mixer get callback
* @kcontrol: mixer control
* @ucontrol: control element information
*
* Callback to get the value of a signed mixer control.
*
* Returns 0 for success.
*/
int snd_soc_get_volsw_s8(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct soc_mixer_control *mc =
(struct soc_mixer_control *)kcontrol->private_value;
struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
unsigned int reg = mc->reg;
int min = mc->min;
int val = snd_soc_read(codec, reg);
ucontrol->value.integer.value[0] =
((signed char)(val & 0xff))-min;
ucontrol->value.integer.value[1] =
((signed char)((val >> 8) & 0xff))-min;
return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_get_volsw_s8);
/**
* snd_soc_put_volsw_sgn - signed mixer put callback
* @kcontrol: mixer control
* @ucontrol: control element information
*
* Callback to set the value of a signed mixer control.
*
* Returns 0 for success.
*/
int snd_soc_put_volsw_s8(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct soc_mixer_control *mc =
(struct soc_mixer_control *)kcontrol->private_value;
struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
unsigned int reg = mc->reg;
int min = mc->min;
unsigned int val;
val = (ucontrol->value.integer.value[0]+min) & 0xff;
val |= ((ucontrol->value.integer.value[1]+min) & 0xff) << 8;
return snd_soc_update_bits_locked(codec, reg, 0xffff, val);
}
EXPORT_SYMBOL_GPL(snd_soc_put_volsw_s8);
/**
* snd_soc_limit_volume - Set new limit to an existing volume control.
*
* @codec: where to look for the control
* @name: Name of the control
* @max: new maximum limit
*
* Return 0 for success, else error.
*/
int snd_soc_limit_volume(struct snd_soc_codec *codec,
const char *name, int max)
{
struct snd_card *card = codec->card->snd_card;
struct snd_kcontrol *kctl;
struct soc_mixer_control *mc;
int found = 0;
int ret = -EINVAL;
/* Sanity check for name and max */
if (unlikely(!name || max <= 0))
return -EINVAL;
list_for_each_entry(kctl, &card->controls, list) {
if (!strncmp(kctl->id.name, name, sizeof(kctl->id.name))) {
found = 1;
break;
}
}
if (found) {
mc = (struct soc_mixer_control *)kctl->private_value;
if (max <= mc->max) {
mc->platform_max = max;
ret = 0;
}
}
return ret;
}
EXPORT_SYMBOL_GPL(snd_soc_limit_volume);
/**
* snd_soc_info_volsw_2r_sx - double with tlv and variable data size
* mixer info callback
* @kcontrol: mixer control
* @uinfo: control element information
*
* Returns 0 for success.
*/
int snd_soc_info_volsw_2r_sx(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_info *uinfo)
{
struct soc_mixer_control *mc =
(struct soc_mixer_control *)kcontrol->private_value;
int max = mc->max;
int min = mc->min;
uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
uinfo->count = 2;
uinfo->value.integer.min = 0;
uinfo->value.integer.max = max-min;
return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_info_volsw_2r_sx);
/**
* snd_soc_get_volsw_2r_sx - double with tlv and variable data size
* mixer get callback
* @kcontrol: mixer control
* @uinfo: control element information
*
* Returns 0 for success.
*/
int snd_soc_get_volsw_2r_sx(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct soc_mixer_control *mc =
(struct soc_mixer_control *)kcontrol->private_value;
struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
unsigned int mask = (1<<mc->shift)-1;
int min = mc->min;
int val = snd_soc_read(codec, mc->reg) & mask;
int valr = snd_soc_read(codec, mc->rreg) & mask;
ucontrol->value.integer.value[0] = ((val & 0xff)-min) & mask;
ucontrol->value.integer.value[1] = ((valr & 0xff)-min) & mask;
return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_get_volsw_2r_sx);
/**
* snd_soc_put_volsw_2r_sx - double with tlv and variable data size
* mixer put callback
* @kcontrol: mixer control
* @uinfo: control element information
*
* Returns 0 for success.
*/
int snd_soc_put_volsw_2r_sx(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct soc_mixer_control *mc =
(struct soc_mixer_control *)kcontrol->private_value;
struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
unsigned int mask = (1<<mc->shift)-1;
int min = mc->min;
int ret;
unsigned int val, valr, oval, ovalr;
val = ((ucontrol->value.integer.value[0]+min) & 0xff);
val &= mask;
valr = ((ucontrol->value.integer.value[1]+min) & 0xff);
valr &= mask;
oval = snd_soc_read(codec, mc->reg) & mask;
ovalr = snd_soc_read(codec, mc->rreg) & mask;
ret = 0;
if (oval != val) {
ret = snd_soc_write(codec, mc->reg, val);
if (ret < 0)
return ret;
}
if (ovalr != valr) {
ret = snd_soc_write(codec, mc->rreg, valr);
if (ret < 0)
return ret;
}
return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_put_volsw_2r_sx);
/**
* 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
return -EINVAL;
}
EXPORT_SYMBOL_GPL(snd_soc_dai_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
return -EINVAL;
}
EXPORT_SYMBOL_GPL(snd_soc_dai_set_pll);
/**
* 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 && dai->driver->ops->set_fmt)
return dai->driver->ops->set_fmt(dai, fmt);
else
return -EINVAL;
}
EXPORT_SYMBOL_GPL(snd_soc_dai_set_fmt);
/**
* snd_soc_dai_set_tdm_slot - configure DAI TDM.
* @dai: DAI
* @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.
*
* Configures a DAI for TDM operation. Both mask and slots are codec and DAI
* specific.
*/
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->set_tdm_slot)
return dai->driver->ops->set_tdm_slot(dai, tx_mask, rx_mask,
slots, slot_width);
else
return -EINVAL;
}
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
*
* Mutes the DAI DAC.
*/
int snd_soc_dai_digital_mute(struct snd_soc_dai *dai, int mute)
{
if (dai->driver && dai->driver->ops->digital_mute)
return dai->driver->ops->digital_mute(dai, mute);
else
return -EINVAL;
}
EXPORT_SYMBOL_GPL(snd_soc_dai_digital_mute);
/**
* snd_soc_register_card - Register a card with the ASoC core
*
* @card: Card to register
*
* Note that currently this is an internal only function: it will be
* exposed to machine drivers after further backporting of ASoC v2
* registration APIs.
*/
static int snd_soc_register_card(struct snd_soc_card *card)
{
int i;
if (!card->name || !card->dev)
return -EINVAL;
card->rtd = kzalloc(sizeof(struct snd_soc_pcm_runtime) *
(card->num_links + card->num_aux_devs),
GFP_KERNEL);
if (card->rtd == NULL)
return -ENOMEM;
card->rtd_aux = &card->rtd[card->num_links];
for (i = 0; i < card->num_links; i++)
card->rtd[i].dai_link = &card->dai_link[i];
INIT_LIST_HEAD(&card->list);
card->instantiated = 0;
mutex_init(&card->mutex);
mutex_lock(&client_mutex);
list_add(&card->list, &card_list);
snd_soc_instantiate_cards();
mutex_unlock(&client_mutex);
dev_dbg(card->dev, "Registered card '%s'\n", card->name);
return 0;
}
/**
* snd_soc_unregister_card - Unregister a card with the ASoC core
*
* @card: Card to unregister
*
* Note that currently this is an internal only function: it will be
* exposed to machine drivers after further backporting of ASoC v2
* registration APIs.
*/
static int snd_soc_unregister_card(struct snd_soc_card *card)
{
mutex_lock(&client_mutex);
list_del(&card->list);
mutex_unlock(&client_mutex);
dev_dbg(card->dev, "Unregistered card '%s'\n", card->name);
return 0;
}
/*
* 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) {
printk(KERN_ERR "asoc: error - multiple DAI %s registered with no name\n",
dev_name(dev));
return NULL;
}
return kstrdup(dai_drv->name, GFP_KERNEL);
}
/**
* snd_soc_register_dai - Register a DAI with the ASoC core
*
* @dai: DAI to register
*/
int snd_soc_register_dai(struct device *dev,
struct snd_soc_dai_driver *dai_drv)
{
struct snd_soc_dai *dai;
dev_dbg(dev, "dai register %s\n", dev_name(dev));
dai = kzalloc(sizeof(struct snd_soc_dai), GFP_KERNEL);
if (dai == NULL)
return -ENOMEM;
/* create DAI component name */
dai->name = fmt_single_name(dev, &dai->id);
if (dai->name == NULL) {
kfree(dai);
return -ENOMEM;
}
dai->dev = dev;
dai->driver = dai_drv;
if (!dai->driver->ops)
dai->driver->ops = &null_dai_ops;
mutex_lock(&client_mutex);
list_add(&dai->list, &dai_list);
snd_soc_instantiate_cards();
mutex_unlock(&client_mutex);
pr_debug("Registered DAI '%s'\n", dai->name);
return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_register_dai);
/**
* snd_soc_unregister_dai - Unregister a DAI from the ASoC core
*
* @dai: DAI to unregister
*/
void snd_soc_unregister_dai(struct device *dev)
{
struct snd_soc_dai *dai;
list_for_each_entry(dai, &dai_list, list) {
if (dev == dai->dev)
goto found;
}
return;
found:
mutex_lock(&client_mutex);
list_del(&dai->list);
mutex_unlock(&client_mutex);
pr_debug("Unregistered DAI '%s'\n", dai->name);
kfree(dai->name);
kfree(dai);
}
EXPORT_SYMBOL_GPL(snd_soc_unregister_dai);
/**
* snd_soc_register_dais - Register multiple DAIs with the ASoC core
*
* @dai: Array of DAIs to register
* @count: Number of DAIs
*/
int snd_soc_register_dais(struct device *dev,
struct snd_soc_dai_driver *dai_drv, size_t count)
{
struct snd_soc_dai *dai;
int i, ret = 0;
dev_dbg(dev, "dai register %s #%Zu\n", dev_name(dev), count);
for (i = 0; i < count; i++) {
dai = kzalloc(sizeof(struct snd_soc_dai), GFP_KERNEL);
if (dai == NULL) {
ret = -ENOMEM;
goto err;
}
/* create DAI component name */
dai->name = fmt_multiple_name(dev, &dai_drv[i]);
if (dai->name == NULL) {
kfree(dai);
ret = -EINVAL;
goto err;
}
dai->dev = dev;
dai->driver = &dai_drv[i];
if (dai->driver->id)
dai->id = dai->driver->id;
else
dai->id = i;
if (!dai->driver->ops)
dai->driver->ops = &null_dai_ops;
mutex_lock(&client_mutex);
list_add(&dai->list, &dai_list);
mutex_unlock(&client_mutex);
pr_debug("Registered DAI '%s'\n", dai->name);
}
mutex_lock(&client_mutex);
snd_soc_instantiate_cards();
mutex_unlock(&client_mutex);
return 0;
err:
for (i--; i >= 0; i--)
snd_soc_unregister_dai(dev);
return ret;
}
EXPORT_SYMBOL_GPL(snd_soc_register_dais);
/**
* snd_soc_unregister_dais - Unregister multiple DAIs from the ASoC core
*
* @dai: Array of DAIs to unregister
* @count: Number of DAIs
*/
void snd_soc_unregister_dais(struct device *dev, size_t count)
{
int i;
for (i = 0; i < count; i++)
snd_soc_unregister_dai(dev);
}
EXPORT_SYMBOL_GPL(snd_soc_unregister_dais);
/**
* snd_soc_register_platform - Register a platform with the ASoC core
*
* @platform: platform to register
*/
int snd_soc_register_platform(struct device *dev,
struct snd_soc_platform_driver *platform_drv)
{
struct snd_soc_platform *platform;
dev_dbg(dev, "platform register %s\n", dev_name(dev));
platform = kzalloc(sizeof(struct snd_soc_platform), GFP_KERNEL);
if (platform == NULL)
return -ENOMEM;
/* create platform component name */
platform->name = fmt_single_name(dev, &platform->id);
if (platform->name == NULL) {
kfree(platform);
return -ENOMEM;
}
platform->dev = dev;
platform->driver = platform_drv;
mutex_lock(&client_mutex);
list_add(&platform->list, &platform_list);
snd_soc_instantiate_cards();
mutex_unlock(&client_mutex);
pr_debug("Registered platform '%s'\n", platform->name);
return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_register_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;
list_for_each_entry(platform, &platform_list, list) {
if (dev == platform->dev)
goto found;
}
return;
found:
mutex_lock(&client_mutex);
list_del(&platform->list);
mutex_unlock(&client_mutex);
pr_debug("Unregistered platform '%s'\n", platform->name);
kfree(platform->name);
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];
}
/**
* 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)
{
size_t reg_size;
struct snd_soc_codec *codec;
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;
/* create CODEC component name */
codec->name = fmt_single_name(dev, &codec->id);
if (codec->name == NULL) {
kfree(codec);
return -ENOMEM;
}
if (codec_drv->compress_type)
codec->compress_type = codec_drv->compress_type;
else
codec->compress_type = SND_SOC_FLAT_COMPRESSION;
INIT_LIST_HEAD(&codec->dapm.widgets);
INIT_LIST_HEAD(&codec->dapm.paths);
codec->write = codec_drv->write;
codec->read = codec_drv->read;
codec->dapm.bias_level = SND_SOC_BIAS_OFF;
codec->dapm.dev = dev;
codec->dapm.codec = codec;
codec->dev = dev;
codec->driver = codec_drv;
codec->num_dai = num_dai;
mutex_init(&codec->mutex);
/* allocate CODEC register cache */
if (codec_drv->reg_cache_size && codec_drv->reg_word_size) {
reg_size = codec_drv->reg_cache_size * codec_drv->reg_word_size;
/* it is necessary to make a copy of the default register cache
* because in the case of using a compression type that requires
* the default register cache to be marked as __devinitconst the
* kernel might have freed the array by the time we initialize
* the cache.
*/
codec->reg_def_copy = kmemdup(codec_drv->reg_cache_default,
reg_size, GFP_KERNEL);
if (!codec->reg_def_copy) {
ret = -ENOMEM;
goto fail;
}
}
for (i = 0; i < num_dai; i++) {
fixup_codec_formats(&dai_drv[i].playback);
fixup_codec_formats(&dai_drv[i].capture);
}
/* register any DAIs */
if (num_dai) {
ret = snd_soc_register_dais(dev, dai_drv, num_dai);
if (ret < 0)
goto fail;
}
mutex_lock(&client_mutex);
list_add(&codec->list, &codec_list);
snd_soc_instantiate_cards();
mutex_unlock(&client_mutex);
pr_debug("Registered codec '%s'\n", codec->name);
return 0;
fail:
kfree(codec->reg_def_copy);
codec->reg_def_copy = NULL;
kfree(codec->name);
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;
int i;
list_for_each_entry(codec, &codec_list, list) {
if (dev == codec->dev)
goto found;
}
return;
found:
if (codec->num_dai)
for (i = 0; i < codec->num_dai; i++)
snd_soc_unregister_dai(dev);
mutex_lock(&client_mutex);
list_del(&codec->list);
mutex_unlock(&client_mutex);
pr_debug("Unregistered codec '%s'\n", codec->name);
snd_soc_cache_exit(codec);
kfree(codec->reg_def_copy);
kfree(codec->name);
kfree(codec);
}
EXPORT_SYMBOL_GPL(snd_soc_unregister_codec);
static int __init snd_soc_init(void)
{
#ifdef CONFIG_DEBUG_FS
debugfs_root = debugfs_create_dir("asoc", NULL);
if (IS_ERR(debugfs_root) || !debugfs_root) {
printk(KERN_WARNING
"ASoC: Failed to create debugfs directory\n");
debugfs_root = NULL;
}
if (!debugfs_create_file("codecs", 0444, debugfs_root, NULL,
&codec_list_fops))
pr_warn("ASoC: Failed to create CODEC list debugfs file\n");
if (!debugfs_create_file("dais", 0444, debugfs_root, NULL,
&dai_list_fops))
pr_warn("ASoC: Failed to create DAI list debugfs file\n");
if (!debugfs_create_file("platforms", 0444, debugfs_root, NULL,
&platform_list_fops))
pr_warn("ASoC: Failed to create platform list debugfs file\n");
#endif
return platform_driver_register(&soc_driver);
}
module_init(snd_soc_init);
static void __exit snd_soc_exit(void)
{
#ifdef CONFIG_DEBUG_FS
debugfs_remove_recursive(debugfs_root);
#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");
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