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linux/sound/soc/codecs/ad1836.c
Mark Brown b2c812e22d ASoC: Add indirection for CODEC private data 
One of the features of the multi CODEC work is that it embeds a struct
device in the CODEC to provide diagnostics via a sysfs class rather than
via the device tree, at which point it's much better to use the struct
device private data rather than having two places to store it. Provide
an accessor function to allow this change to be made more easily, and
update all the CODEC drivers are updated.

To ensure use of the accessor the private data structure member is
renamed, meaning that if code developed with older an older core that
still uses private_data is merged it will fail to build.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Acked-by: Liam Girdwood <lrg@slimlogic.co.uk>
2010-04-17 10:46:22 +09:00

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/*
* File: sound/soc/codecs/ad1836.c
* Author: Barry Song <Barry.Song@analog.com>
*
* Created: Aug 04 2009
* Description: Driver for AD1836 sound chip
*
* Modified:
* Copyright 2009 Analog Devices Inc.
*
* Bugs: Enter bugs at http://blackfin.uclinux.org/
*
* 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.
*/
#include <linux/init.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/device.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/initval.h>
#include <sound/soc.h>
#include <sound/tlv.h>
#include <sound/soc-dapm.h>
#include <linux/spi/spi.h>
#include "ad1836.h"
/* codec private data */
struct ad1836_priv {
struct snd_soc_codec codec;
u16 reg_cache[AD1836_NUM_REGS];
};
static struct snd_soc_codec *ad1836_codec;
struct snd_soc_codec_device soc_codec_dev_ad1836;
static int ad1836_register(struct ad1836_priv *ad1836);
static void ad1836_unregister(struct ad1836_priv *ad1836);
/*
* AD1836 volume/mute/de-emphasis etc. controls
*/
static const char *ad1836_deemp[] = {"None", "44.1kHz", "32kHz", "48kHz"};
static const struct soc_enum ad1836_deemp_enum =
SOC_ENUM_SINGLE(AD1836_DAC_CTRL1, 8, 4, ad1836_deemp);
static const struct snd_kcontrol_new ad1836_snd_controls[] = {
/* DAC volume control */
SOC_DOUBLE_R("DAC1 Volume", AD1836_DAC_L1_VOL,
AD1836_DAC_R1_VOL, 0, 0x3FF, 0),
SOC_DOUBLE_R("DAC2 Volume", AD1836_DAC_L2_VOL,
AD1836_DAC_R2_VOL, 0, 0x3FF, 0),
SOC_DOUBLE_R("DAC3 Volume", AD1836_DAC_L3_VOL,
AD1836_DAC_R3_VOL, 0, 0x3FF, 0),
/* ADC switch control */
SOC_DOUBLE("ADC1 Switch", AD1836_ADC_CTRL2, AD1836_ADCL1_MUTE,
AD1836_ADCR1_MUTE, 1, 1),
SOC_DOUBLE("ADC2 Switch", AD1836_ADC_CTRL2, AD1836_ADCL2_MUTE,
AD1836_ADCR2_MUTE, 1, 1),
/* DAC switch control */
SOC_DOUBLE("DAC1 Switch", AD1836_DAC_CTRL2, AD1836_DACL1_MUTE,
AD1836_DACR1_MUTE, 1, 1),
SOC_DOUBLE("DAC2 Switch", AD1836_DAC_CTRL2, AD1836_DACL2_MUTE,
AD1836_DACR2_MUTE, 1, 1),
SOC_DOUBLE("DAC3 Switch", AD1836_DAC_CTRL2, AD1836_DACL3_MUTE,
AD1836_DACR3_MUTE, 1, 1),
/* ADC high-pass filter */
SOC_SINGLE("ADC High Pass Filter Switch", AD1836_ADC_CTRL1,
AD1836_ADC_HIGHPASS_FILTER, 1, 0),
/* DAC de-emphasis */
SOC_ENUM("Playback Deemphasis", ad1836_deemp_enum),
};
static const struct snd_soc_dapm_widget ad1836_dapm_widgets[] = {
SND_SOC_DAPM_DAC("DAC", "Playback", AD1836_DAC_CTRL1,
AD1836_DAC_POWERDOWN, 1),
SND_SOC_DAPM_ADC("ADC", "Capture", SND_SOC_NOPM, 0, 0),
SND_SOC_DAPM_SUPPLY("ADC_PWR", AD1836_ADC_CTRL1,
AD1836_ADC_POWERDOWN, 1, NULL, 0),
SND_SOC_DAPM_OUTPUT("DAC1OUT"),
SND_SOC_DAPM_OUTPUT("DAC2OUT"),
SND_SOC_DAPM_OUTPUT("DAC3OUT"),
SND_SOC_DAPM_INPUT("ADC1IN"),
SND_SOC_DAPM_INPUT("ADC2IN"),
};
static const struct snd_soc_dapm_route audio_paths[] = {
{ "DAC", NULL, "ADC_PWR" },
{ "ADC", NULL, "ADC_PWR" },
{ "DAC1OUT", "DAC1 Switch", "DAC" },
{ "DAC2OUT", "DAC2 Switch", "DAC" },
{ "DAC3OUT", "DAC3 Switch", "DAC" },
{ "ADC", "ADC1 Switch", "ADC1IN" },
{ "ADC", "ADC2 Switch", "ADC2IN" },
};
/*
* DAI ops entries
*/
static int ad1836_set_dai_fmt(struct snd_soc_dai *codec_dai,
unsigned int fmt)
{
switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
/* at present, we support adc aux mode to interface with
* blackfin sport tdm mode
*/
case SND_SOC_DAIFMT_DSP_A:
break;
default:
return -EINVAL;
}
switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
case SND_SOC_DAIFMT_IB_IF:
break;
default:
return -EINVAL;
}
switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
/* ALCLK,ABCLK are both output, AD1836 can only be master */
case SND_SOC_DAIFMT_CBM_CFM:
break;
default:
return -EINVAL;
}
return 0;
}
static int ad1836_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params,
struct snd_soc_dai *dai)
{
int word_len = 0;
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct snd_soc_device *socdev = rtd->socdev;
struct snd_soc_codec *codec = socdev->card->codec;
/* bit size */
switch (params_format(params)) {
case SNDRV_PCM_FORMAT_S16_LE:
word_len = 3;
break;
case SNDRV_PCM_FORMAT_S20_3LE:
word_len = 1;
break;
case SNDRV_PCM_FORMAT_S24_LE:
case SNDRV_PCM_FORMAT_S32_LE:
word_len = 0;
break;
}
snd_soc_update_bits(codec, AD1836_DAC_CTRL1,
AD1836_DAC_WORD_LEN_MASK, word_len);
snd_soc_update_bits(codec, AD1836_ADC_CTRL2,
AD1836_ADC_WORD_LEN_MASK, word_len);
return 0;
}
#ifdef CONFIG_PM
static int ad1836_soc_suspend(struct platform_device *pdev,
pm_message_t state)
{
struct snd_soc_device *socdev = platform_get_drvdata(pdev);
struct snd_soc_codec *codec = socdev->card->codec;
/* reset clock control mode */
u16 adc_ctrl2 = snd_soc_read(codec, AD1836_ADC_CTRL2);
adc_ctrl2 &= ~AD1836_ADC_SERFMT_MASK;
return snd_soc_write(codec, AD1836_ADC_CTRL2, adc_ctrl2);
}
static int ad1836_soc_resume(struct platform_device *pdev)
{
struct snd_soc_device *socdev = platform_get_drvdata(pdev);
struct snd_soc_codec *codec = socdev->card->codec;
/* restore clock control mode */
u16 adc_ctrl2 = snd_soc_read(codec, AD1836_ADC_CTRL2);
adc_ctrl2 |= AD1836_ADC_AUX;
return snd_soc_write(codec, AD1836_ADC_CTRL2, adc_ctrl2);
}
#else
#define ad1836_soc_suspend NULL
#define ad1836_soc_resume NULL
#endif
static int __devinit ad1836_spi_probe(struct spi_device *spi)
{
struct snd_soc_codec *codec;
struct ad1836_priv *ad1836;
ad1836 = kzalloc(sizeof(struct ad1836_priv), GFP_KERNEL);
if (ad1836 == NULL)
return -ENOMEM;
codec = &ad1836->codec;
codec->control_data = spi;
codec->dev = &spi->dev;
dev_set_drvdata(&spi->dev, ad1836);
return ad1836_register(ad1836);
}
static int __devexit ad1836_spi_remove(struct spi_device *spi)
{
struct ad1836_priv *ad1836 = dev_get_drvdata(&spi->dev);
ad1836_unregister(ad1836);
return 0;
}
static struct spi_driver ad1836_spi_driver = {
.driver = {
.name = "ad1836",
.owner = THIS_MODULE,
},
.probe = ad1836_spi_probe,
.remove = __devexit_p(ad1836_spi_remove),
};
static struct snd_soc_dai_ops ad1836_dai_ops = {
.hw_params = ad1836_hw_params,
.set_fmt = ad1836_set_dai_fmt,
};
/* codec DAI instance */
struct snd_soc_dai ad1836_dai = {
.name = "AD1836",
.playback = {
.stream_name = "Playback",
.channels_min = 2,
.channels_max = 6,
.rates = SNDRV_PCM_RATE_48000,
.formats = SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_S16_LE |
SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S24_LE,
},
.capture = {
.stream_name = "Capture",
.channels_min = 2,
.channels_max = 4,
.rates = SNDRV_PCM_RATE_48000,
.formats = SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_S16_LE |
SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S24_LE,
},
.ops = &ad1836_dai_ops,
};
EXPORT_SYMBOL_GPL(ad1836_dai);
static int ad1836_register(struct ad1836_priv *ad1836)
{
int ret;
struct snd_soc_codec *codec = &ad1836->codec;
if (ad1836_codec) {
dev_err(codec->dev, "Another ad1836 is registered\n");
return -EINVAL;
}
mutex_init(&codec->mutex);
INIT_LIST_HEAD(&codec->dapm_widgets);
INIT_LIST_HEAD(&codec->dapm_paths);
snd_soc_codec_set_drvdata(codec, ad1836);
codec->reg_cache = ad1836->reg_cache;
codec->reg_cache_size = AD1836_NUM_REGS;
codec->name = "AD1836";
codec->owner = THIS_MODULE;
codec->dai = &ad1836_dai;
codec->num_dai = 1;
INIT_LIST_HEAD(&codec->dapm_widgets);
INIT_LIST_HEAD(&codec->dapm_paths);
ad1836_dai.dev = codec->dev;
ad1836_codec = codec;
ret = snd_soc_codec_set_cache_io(codec, 4, 12, SND_SOC_SPI);
if (ret < 0) {
dev_err(codec->dev, "failed to set cache I/O: %d\n",
ret);
kfree(ad1836);
return ret;
}
/* default setting for ad1836 */
/* de-emphasis: 48kHz, power-on dac */
snd_soc_write(codec, AD1836_DAC_CTRL1, 0x300);
/* unmute dac channels */
snd_soc_write(codec, AD1836_DAC_CTRL2, 0x0);
/* high-pass filter enable, power-on adc */
snd_soc_write(codec, AD1836_ADC_CTRL1, 0x100);
/* unmute adc channles, adc aux mode */
snd_soc_write(codec, AD1836_ADC_CTRL2, 0x180);
/* left/right diff:PGA/MUX */
snd_soc_write(codec, AD1836_ADC_CTRL3, 0x3A);
/* volume */
snd_soc_write(codec, AD1836_DAC_L1_VOL, 0x3FF);
snd_soc_write(codec, AD1836_DAC_R1_VOL, 0x3FF);
snd_soc_write(codec, AD1836_DAC_L2_VOL, 0x3FF);
snd_soc_write(codec, AD1836_DAC_R2_VOL, 0x3FF);
snd_soc_write(codec, AD1836_DAC_L3_VOL, 0x3FF);
snd_soc_write(codec, AD1836_DAC_R3_VOL, 0x3FF);
ret = snd_soc_register_codec(codec);
if (ret != 0) {
dev_err(codec->dev, "Failed to register codec: %d\n", ret);
kfree(ad1836);
return ret;
}
ret = snd_soc_register_dai(&ad1836_dai);
if (ret != 0) {
dev_err(codec->dev, "Failed to register DAI: %d\n", ret);
snd_soc_unregister_codec(codec);
kfree(ad1836);
return ret;
}
return 0;
}
static void ad1836_unregister(struct ad1836_priv *ad1836)
{
snd_soc_unregister_dai(&ad1836_dai);
snd_soc_unregister_codec(&ad1836->codec);
kfree(ad1836);
ad1836_codec = NULL;
}
static int ad1836_probe(struct platform_device *pdev)
{
struct snd_soc_device *socdev = platform_get_drvdata(pdev);
struct snd_soc_codec *codec;
int ret = 0;
if (ad1836_codec == NULL) {
dev_err(&pdev->dev, "Codec device not registered\n");
return -ENODEV;
}
socdev->card->codec = ad1836_codec;
codec = ad1836_codec;
/* register pcms */
ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1);
if (ret < 0) {
dev_err(codec->dev, "failed to create pcms: %d\n", ret);
goto pcm_err;
}
snd_soc_add_controls(codec, ad1836_snd_controls,
ARRAY_SIZE(ad1836_snd_controls));
snd_soc_dapm_new_controls(codec, ad1836_dapm_widgets,
ARRAY_SIZE(ad1836_dapm_widgets));
snd_soc_dapm_add_routes(codec, audio_paths, ARRAY_SIZE(audio_paths));
pcm_err:
return ret;
}
/* power down chip */
static int ad1836_remove(struct platform_device *pdev)
{
struct snd_soc_device *socdev = platform_get_drvdata(pdev);
snd_soc_free_pcms(socdev);
snd_soc_dapm_free(socdev);
return 0;
}
struct snd_soc_codec_device soc_codec_dev_ad1836 = {
.probe = ad1836_probe,
.remove = ad1836_remove,
.suspend = ad1836_soc_suspend,
.resume = ad1836_soc_resume,
};
EXPORT_SYMBOL_GPL(soc_codec_dev_ad1836);
static int __init ad1836_init(void)
{
int ret;
ret = spi_register_driver(&ad1836_spi_driver);
if (ret != 0) {
printk(KERN_ERR "Failed to register ad1836 SPI driver: %d\n",
ret);
}
return ret;
}
module_init(ad1836_init);
static void __exit ad1836_exit(void)
{
spi_unregister_driver(&ad1836_spi_driver);
}
module_exit(ad1836_exit);
MODULE_DESCRIPTION("ASoC ad1836 driver");
MODULE_AUTHOR("Barry Song <21cnbao@gmail.com>");
MODULE_LICENSE("GPL");
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