blob: e19c24ade414a3eef34073f6f98da139c8ff8b5a [file] [log] [blame]
/*
* 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/ctype.h>
#include <linux/slab.h>
#include <linux/of.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 DECLARE_WAIT_QUEUE_HEAD(soc_pm_waitq);
#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(card_list);
static LIST_HEAD(dai_list);
static LIST_HEAD(platform_list);
static LIST_HEAD(codec_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) {
if (!snd_soc_codec_readable_register(codec, i))
continue;
if (codec->driver->display_register) {
count += codec->driver->display_register(codec, buf + count,
PAGE_SIZE - count, i);
} else {
/* 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 = 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 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;
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++;
if (strict_strtoul(start, 16, &value))
return -EINVAL;
/* Userspace has been fiddling around behind the kernel's back */
add_taint(TAINT_USER);
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_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) {
dev_warn(codec->dev, "Failed to create codec debugfs directory\n");
return;
}
debugfs_create_bool("cache_sync", 0444, codec->debugfs_codec_root,
&codec->cache_sync);
debugfs_create_bool("cache_only", 0444, codec->debugfs_codec_root,
&codec->cache_only);
codec->debugfs_reg = debugfs_create_file("codec_reg", 0644,
codec->debugfs_codec_root,
codec, &codec_reg_fops);
if (!codec->debugfs_reg)
dev_warn(codec->dev, "Failed to create codec register debugfs file\n");
snd_soc_dapm_debugfs_init(&codec->dapm, codec->debugfs_codec_root);
}
static void soc_cleanup_codec_debugfs(struct snd_soc_codec *codec)
{
debugfs_remove_recursive(codec->debugfs_codec_root);
}
static void soc_init_platform_debugfs(struct snd_soc_platform *platform)
{
struct dentry *debugfs_card_root = platform->card->debugfs_card_root;
platform->debugfs_platform_root = debugfs_create_dir(platform->name,
debugfs_card_root);
if (!platform->debugfs_platform_root) {
dev_warn(platform->dev,
"Failed to create platform debugfs directory\n");
return;
}
snd_soc_dapm_debugfs_init(&platform->dapm,
platform->debugfs_platform_root);
}
static void soc_cleanup_platform_debugfs(struct snd_soc_platform *platform)
{
debugfs_remove_recursive(platform->debugfs_platform_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,
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,
"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_platform_debugfs(struct snd_soc_platform *platform)
{
}
static inline void soc_cleanup_platform_debugfs(struct snd_soc_platform *platform)
{
}
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
#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;
/* 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(card);
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++) {
flush_delayed_work_sync(&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 *codec_dai = card->rtd[i].codec_dai;
if (card->rtd[i].dai_link->ignore_suspend)
continue;
snd_soc_dapm_stream_event(&card->rtd[i],
SNDRV_PCM_STREAM_PLAYBACK,
codec_dai,
SND_SOC_DAPM_STREAM_SUSPEND);
snd_soc_dapm_stream_event(&card->rtd[i],
SNDRV_PCM_STREAM_CAPTURE,
codec_dai,
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:
/*
* 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,
"idle_bias_off CODEC on over suspend\n");
break;
}
case SND_SOC_BIAS_OFF:
codec->driver->suspend(codec);
codec->suspended = 1;
codec->cache_sync = 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(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;
/* 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(card);
/* 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 *codec_dai = card->rtd[i].codec_dai;
if (card->rtd[i].dai_link->ignore_suspend)
continue;
snd_soc_dapm_stream_event(&card->rtd[i],
SNDRV_PCM_STREAM_PLAYBACK, codec_dai,
SND_SOC_DAPM_STREAM_RESUME);
snd_soc_dapm_stream_event(&card->rtd[i],
SNDRV_PCM_STREAM_CAPTURE, codec_dai,
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(card);
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 */
int snd_soc_resume(struct device *dev)
{
struct snd_soc_card *card = dev_get_drvdata(dev);
int i, ac97_control = 0;
/* 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;
/* 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;
ac97_control |= cpu_dai->driver->ac97_control;
}
if (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;
}
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 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;
const char *platform_name;
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 (dai_link->cpu_dai_of_node) {
if (cpu_dai->dev->of_node != dai_link->cpu_dai_of_node)
continue;
} else {
if (strcmp(cpu_dai->name, dai_link->cpu_dai_name))
continue;
}
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 (dai_link->codec_of_node) {
if (codec->dev->of_node != dai_link->codec_of_node)
continue;
} else {
if (strcmp(codec->name, dai_link->codec_name))
continue;
}
rtd->codec = codec;
/*
* 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 need a platform? */
if (rtd->platform)
goto out;
/* 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";
/* no, then 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->name, platform_name))
continue;
}
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, int order)
{
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 &&
codec_dai->driver->remove_order == order) {
if (codec_dai->driver->remove) {
err = codec_dai->driver->remove(codec_dai);
if (err < 0)
pr_err("asoc: failed to remove %s: %d\n",
codec_dai->name, err);
}
codec_dai->probed = 0;
list_del(&codec_dai->card_list);
}
/* remove the platform */
if (platform && platform->probed &&
platform->driver->remove_order == order) {
if (platform->driver->remove) {
err = platform->driver->remove(platform);
if (err < 0)
pr_err("asoc: failed to remove %s: %d\n",
platform->name, err);
}
/* Make sure all DAPM widgets are freed */
snd_soc_dapm_free(&platform->dapm);
soc_cleanup_platform_debugfs(platform);
platform->probed = 0;
list_del(&platform->card_list);
module_put(platform->dev->driver->owner);
}
/* remove the CODEC */
if (codec && codec->probed &&
codec->driver->remove_order == order)
soc_remove_codec(codec);
/* remove the cpu_dai */
if (cpu_dai && cpu_dai->probed &&
cpu_dai->driver->remove_order == order) {
if (cpu_dai->driver->remove) {
err = cpu_dai->driver->remove(cpu_dai);
if (err < 0)
pr_err("asoc: failed to remove %s: %d\n",
cpu_dai->name, err);
}
cpu_dai->probed = 0;
list_del(&cpu_dai->card_list);
module_put(cpu_dai->dev->driver->owner);
}
}
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_dai_link(card, dai, order);
}
card->num_rtd = 0;
}
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;
const struct snd_soc_codec_driver *driver = codec->driver;
struct snd_soc_dai *dai;
codec->card = card;
codec->dapm.card = card;
soc_set_name_prefix(card, codec);
if (!try_module_get(codec->dev->driver->owner))
return -ENODEV;
soc_init_codec_debugfs(codec);
if (driver->dapm_widgets)
snd_soc_dapm_new_controls(&codec->dapm, driver->dapm_widgets,
driver->num_dapm_widgets);
/* Create DAPM widgets for each DAI stream */
list_for_each_entry(dai, &dai_list, list) {
if (dai->dev != codec->dev)
continue;
snd_soc_dapm_new_dai_widgets(&codec->dapm, dai);
}
codec->dapm.idle_bias_off = driver->idle_bias_off;
if (driver->probe) {
ret = driver->probe(codec);
if (ret < 0) {
dev_err(codec->dev,
"asoc: failed to probe CODEC %s: %d\n",
codec->name, ret);
goto err_probe;
}
}
if (driver->controls)
snd_soc_add_codec_controls(codec, driver->controls,
driver->num_controls);
if (driver->dapm_routes)
snd_soc_dapm_add_routes(&codec->dapm, driver->dapm_routes,
driver->num_dapm_routes);
/* mark codec as probed and add to card codec list */
codec->probed = 1;
list_add(&codec->card_list, &card->codec_dev_list);
list_add(&codec->dapm.list, &card->dapm_list);
return 0;
err_probe:
soc_cleanup_codec_debugfs(codec);
module_put(codec->dev->driver->owner);
return ret;
}
static int soc_probe_platform(struct snd_soc_card *card,
struct snd_soc_platform *platform)
{
int ret = 0;
const struct snd_soc_platform_driver *driver = platform->driver;
platform->card = card;
platform->dapm.card = card;
if (!try_module_get(platform->dev->driver->owner))
return -ENODEV;
soc_init_platform_debugfs(platform);
if (driver->dapm_widgets)
snd_soc_dapm_new_controls(&platform->dapm,
driver->dapm_widgets, driver->num_dapm_widgets);
if (driver->probe) {
ret = driver->probe(platform);
if (ret < 0) {
dev_err(platform->dev,
"asoc: failed to probe platform %s: %d\n",
platform->name, ret);
goto err_probe;
}
}
if (driver->controls)
snd_soc_add_platform_controls(platform, driver->controls,
driver->num_controls);
if (driver->dapm_routes)
snd_soc_dapm_add_routes(&platform->dapm, driver->dapm_routes,
driver->num_dapm_routes);
/* mark platform as probed and add to card platform list */
platform->probed = 1;
list_add(&platform->card_list, &card->platform_dev_list);
list_add(&platform->dapm.list, &card->dapm_list);
return 0;
err_probe:
soc_cleanup_platform_debugfs(platform);
module_put(platform->dev->driver->owner);
return ret;
}
static void rtd_release(struct device *dev)
{
kfree(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;
}
rtd->card = card;
/* Make sure all DAPM widgets are instantiated */
snd_soc_dapm_new_widgets(&codec->dapm);
/* 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;
/* register the rtd device */
rtd->codec = codec;
rtd->dev = kzalloc(sizeof(struct device), GFP_KERNEL);
if (!rtd->dev)
return -ENOMEM;
device_initialize(rtd->dev);
rtd->dev->parent = card->dev;
rtd->dev->release = rtd_release;
rtd->dev->init_name = name;
dev_set_drvdata(rtd->dev, rtd);
mutex_init(&rtd->pcm_mutex);
ret = device_add(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, 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_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 late %d\n",
card->name, num, order);
/* 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 &&
cpu_dai->driver->probe_order == order) {
if (!try_module_get(cpu_dai->dev->driver->owner))
return -ENODEV;
if (cpu_dai->driver->probe) {
ret = cpu_dai->driver->probe(cpu_dai);
if (ret < 0) {
pr_err("asoc: failed to probe CPU DAI %s: %d\n",
cpu_dai->name, ret);
module_put(cpu_dai->dev->driver->owner);
return ret;
}
}
cpu_dai->probed = 1;
/* mark cpu_dai as probed and add to card dai list */
list_add(&cpu_dai->card_list, &card->dai_dev_list);
}
/* probe the CODEC */
if (!codec->probed &&
codec->driver->probe_order == order) {
ret = soc_probe_codec(card, codec);
if (ret < 0)
return ret;
}
/* probe the platform */
if (!platform->probed &&
platform->driver->probe_order == order) {
ret = soc_probe_platform(card, platform);
if (ret < 0)
return ret;
}
/* probe the CODEC DAI */
if (!codec_dai->probed && codec_dai->driver->probe_order == order) {
if (codec_dai->driver->probe) {
ret = codec_dai->driver->probe(codec_dai);
if (ret < 0) {
pr_err("asoc: failed to probe CODEC DAI %s: %d\n",
codec_dai->name, ret);
return ret;
}
}
/* mark codec_dai as probed and add to card dai list */
codec_dai->probed = 1;
list_add(&codec_dai->card_list, &card->dai_dev_list);
}
/* complete DAI probe during last probe */
if (order != SND_SOC_COMP_ORDER_LAST)
return 0;
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)
pr_warn("asoc: failed to add pmdown_time sysfs:%d\n", ret);
/* create the pcm */
ret = soc_new_pcm(rtd, num);
if (ret < 0) {
pr_err("asoc: can't create pcm %s :%d\n",
dai_link->stream_name, ret);
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) {
pr_err("asoc: AC97 device register failed:%d\n", ret);
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:
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_del(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 snd_soc_codec *codec;
struct snd_soc_codec_conf *codec_conf;
enum snd_soc_compress_type compress_type;
struct snd_soc_dai_link *dai_link;
int ret, i, order;
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;
/* by default we don't override the compress_type */
compress_type = 0;
/* 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;
}
}
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) {
pr_err("asoc: can't create sound card for card %s: %d\n",
card->name, ret);
mutex_unlock(&card->mutex);
return;
}
card->snd_card->dev = card->dev;
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);
/* initialise the sound card only once */
if (card->probe) {
ret = card->probe(card);
if (ret < 0)
goto card_probe_error;
}
/* early DAI link probe */
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_dai_link(card, i, order);
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;
}
}
snd_soc_dapm_link_dai_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);
snd_soc_dapm_new_widgets(&card->dapm);
for (i = 0; i < card->num_links; i++) {
dai_link = &card->dai_link[i];
if (dai_link->dai_fmt) {
ret = snd_soc_dai_set_fmt(card->rtd[i].codec_dai,
dai_link->dai_fmt);
if (ret != 0 && ret != -ENOTSUPP)
dev_warn(card->rtd[i].codec_dai->dev,
"Failed to set DAI format: %d\n",
ret);
ret = snd_soc_dai_set_fmt(card->rtd[i].cpu_dai,
dai_link->dai_fmt);
if (ret != 0 && ret != -ENOTSUPP)
dev_warn(card->rtd[i].cpu_dai->dev,
"Failed to set DAI format: %d\n",
ret);
}
}
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, "%s late_probe() failed: %d\n",
card->name, ret);
goto probe_aux_dev_err;
}
}
snd_soc_dapm_new_widgets(&card->dapm);
if (card->fully_routed)
list_for_each_entry(codec, &card->codec_dev_list, card_list)
snd_soc_dapm_auto_nc_codec_pins(codec);
ret = snd_card_register(card->snd_card);
if (ret < 0) {
pr_err("asoc: failed to register soundcard for %s: %d\n",
card->name, ret);
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) {
pr_err("asoc: failed to register AC97 %s: %d\n",
card->name, ret);
while (--i >= 0)
soc_unregister_ac97_dai_link(card->rtd[i].codec);
goto probe_aux_dev_err;
}
}
#endif
card->instantiated = 1;
snd_soc_dapm_sync(&card->dapm);
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:
soc_remove_dai_links(card);
card_probe_error:
if (card->remove)
card->remove(card);
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;
/*
* 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;
ret = snd_soc_register_card(card);
if (ret != 0) {
dev_err(&pdev->dev, "Failed to register card\n");
return ret;
}
return 0;
}
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_sync(&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_sync(&rtd->delayed_work);
}
snd_soc_dapm_shutdown(card);
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",
.owner = THIS_MODULE,
.pm = &snd_soc_pm_ops,
},
.probe = soc_probe,
.remove = soc_remove,
};
/**
* 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,
unsigned int reg)
{
if (codec->volatile_register)
return codec->volatile_register(codec, reg);
else
return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_codec_volatile_register);
/**
* snd_soc_codec_readable_register: Report if a register is readable.
*
* @codec: CODEC to query.
* @reg: Register to query.
*
* Boolean function indicating if a CODEC register is readable.
*/
int snd_soc_codec_readable_register(struct snd_soc_codec *codec,
unsigned int reg)
{
if (codec->readable_register)
return codec->readable_register(codec, reg);
else
return 1;
}
EXPORT_SYMBOL_GPL(snd_soc_codec_readable_register);
/**
* snd_soc_codec_writable_register: Report if a register is writable.
*
* @codec: CODEC to query.
* @reg: Register to query.
*
* Boolean function indicating if a CODEC register is writable.
*/
int snd_soc_codec_writable_register(struct snd_soc_codec *codec,
unsigned int reg)
{
if (codec->writable_register)
return codec->writable_register(codec, reg);
else
return 1;
}
EXPORT_SYMBOL_GPL(snd_soc_codec_writable_register);
int snd_soc_platform_read(struct snd_soc_platform *platform,
unsigned int reg)
{
unsigned int ret;
if (!platform->driver->read) {
dev_err(platform->dev, "platform has no read back\n");
return -1;
}
ret = platform->driver->read(platform, reg);
dev_dbg(platform->dev, "read %x => %x\n", reg, ret);
trace_snd_soc_preg_read(platform, reg, ret);
return ret;
}
EXPORT_SYMBOL_GPL(snd_soc_platform_read);
int snd_soc_platform_write(struct snd_soc_platform *platform,
unsigned int reg, unsigned int val)
{
if (!platform->driver->write) {
dev_err(platform->dev, "platform has no write back\n");
return -1;
}
dev_dbg(platform->dev, "write %x = %x\n", reg, val);
trace_snd_soc_preg_write(platform, reg, val);
return platform->driver->write(platform, reg, val);
}
EXPORT_SYMBOL_GPL(snd_soc_platform_write);
/**
* 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);
unsigned int snd_soc_bulk_write_raw(struct snd_soc_codec *codec,
unsigned int reg, const void *data, size_t len)
{
return codec->bulk_write_raw(codec, reg, data, len);
}
EXPORT_SYMBOL_GPL(snd_soc_bulk_write_raw);
/**
* 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, 0 for no change, or negative error code.
*/
int snd_soc_update_bits(struct snd_soc_codec *codec, unsigned short reg,
unsigned int mask, unsigned int value)
{
bool change;
unsigned int old, new;
int ret;
if (codec->using_regmap) {
ret = regmap_update_bits_check(codec->control_data, reg,
mask, value, &change);
} else {
ret = snd_soc_read(codec, reg);
if (ret < 0)
return ret;
old = ret;
new = (old & ~mask) | (value & mask);
change = old != new;
if (change)
ret = snd_soc_write(codec, reg, new);
}
if (ret < 0)
return ret;
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
* @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;
int name_len;
memcpy(&template, _template, sizeof(template));
template.index = 0;
if (!long_name)
long_name = template.name;
if (prefix) {
name_len = strlen(long_name) + strlen(prefix) + 2;
name = kmalloc(name_len, GFP_KERNEL);
if (!name)
return NULL;
snprintf(name, name_len, "%s %s", prefix, long_name);
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, "Failed to add %s: %d\n", control->name, err);
return err;
}
}
return 0;
}
/**
* 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, int num_controls)
{
struct snd_card *card = codec->card->snd_card;
return snd_soc_add_controls(card, codec->dev, controls, num_controls,
codec->name_prefix, codec);
}
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, int num_controls)
{
struct snd_card *card = platform->card->snd_card;
return snd_soc_add_controls(card, platform->dev, controls, num_controls,
NULL, platform);
}
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->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_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, or a double
* mixer control that spans 2 registers.
*
* 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;
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 = snd_soc_volsw_is_stereo(mc) ? 2 : 1;
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, or a double mixer
* control that spans 2 registers.
*
* 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 reg2 = mc->rreg;
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 (invert)
ucontrol->value.integer.value[0] =
max - ucontrol->value.integer.value[0];
if (snd_soc_volsw_is_stereo(mc)) {
if (reg == reg2)
ucontrol->value.integer.value[1] =
(snd_soc_read(codec, reg) >> rshift) & mask;
else
ucontrol->value.integer.value[1] =
(snd_soc_read(codec, reg2) >> shift) & mask;
if (invert)
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, or a double mixer
* control that spans 2 registers.
*
* 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 reg2 = mc->rreg;
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;
int err;
bool type_2r = 0;
unsigned int val2 = 0;
unsigned int val, val_mask;
val = (ucontrol->value.integer.value[0] & mask);
if (invert)
val = max - val;
val_mask = mask << shift;
val = val << shift;
if (snd_soc_volsw_is_stereo(mc)) {
val2 = (ucontrol->value.integer.value[1] & mask);
if (invert)
val2 = max - val2;
if (reg == reg2) {
val_mask |= mask << rshift;
val |= val2 << rshift;
} else {
val2 = val2 << shift;
type_2r = 1;
}
}
err = snd_soc_update_bits_locked(codec, reg, val_mask, val);
if (err < 0)
return err;
if (type_2r)
err = snd_soc_update_bits_locked(codec, reg2, val_mask, val2);
return err;
}
EXPORT_SYMBOL_GPL(snd_soc_put_volsw);
/**
* 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);