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linux/sound/soc/codecs/wm8728.c
Mark Brown e6968a1719 ASoC: codecs: Remove rtd->codec usage from CODEC drivers 
In order to support CODEC<->CODEC links remove the assumption that there
is only a single CODEC on a DAI link by removing the use of the CODEC
pointer in the rtd from the CODEC drivers. They are already being passed
their DAI whenever they are passed an rtd and can get the CODEC from
there.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
2012-04-04 15:59:12 +01:00

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/*
* wm8728.c -- WM8728 ALSA SoC Audio driver
*
* Copyright 2008 Wolfson Microelectronics plc
*
* Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <linux/pm.h>
#include <linux/i2c.h>
#include <linux/platform_device.h>
#include <linux/spi/spi.h>
#include <linux/slab.h>
#include <linux/of_device.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>
#include <sound/initval.h>
#include <sound/tlv.h>
#include "wm8728.h"
/*
* We can't read the WM8728 register space so we cache them instead.
* Note that the defaults here aren't the physical defaults, we latch
* the volume update bits, mute the output and enable infinite zero
* detect.
*/
static const u16 wm8728_reg_defaults[] = {
0x1ff,
0x1ff,
0x001,
0x100,
};
/* codec private data */
struct wm8728_priv {
enum snd_soc_control_type control_type;
};
static const DECLARE_TLV_DB_SCALE(wm8728_tlv, -12750, 50, 1);
static const struct snd_kcontrol_new wm8728_snd_controls[] = {
SOC_DOUBLE_R_TLV("Digital Playback Volume", WM8728_DACLVOL, WM8728_DACRVOL,
0, 255, 0, wm8728_tlv),
SOC_SINGLE("Deemphasis", WM8728_DACCTL, 1, 1, 0),
};
/*
* DAPM controls.
*/
static const struct snd_soc_dapm_widget wm8728_dapm_widgets[] = {
SND_SOC_DAPM_DAC("DAC", "HiFi Playback", SND_SOC_NOPM, 0, 0),
SND_SOC_DAPM_OUTPUT("VOUTL"),
SND_SOC_DAPM_OUTPUT("VOUTR"),
};
static const struct snd_soc_dapm_route wm8728_intercon[] = {
{"VOUTL", NULL, "DAC"},
{"VOUTR", NULL, "DAC"},
};
static int wm8728_mute(struct snd_soc_dai *dai, int mute)
{
struct snd_soc_codec *codec = dai->codec;
u16 mute_reg = snd_soc_read(codec, WM8728_DACCTL);
if (mute)
snd_soc_write(codec, WM8728_DACCTL, mute_reg | 1);
else
snd_soc_write(codec, WM8728_DACCTL, mute_reg & ~1);
return 0;
}
static int wm8728_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params,
struct snd_soc_dai *dai)
{
struct snd_soc_codec *codec = dai->codec;
u16 dac = snd_soc_read(codec, WM8728_DACCTL);
dac &= ~0x18;
switch (params_format(params)) {
case SNDRV_PCM_FORMAT_S16_LE:
break;
case SNDRV_PCM_FORMAT_S20_3LE:
dac |= 0x10;
break;
case SNDRV_PCM_FORMAT_S24_LE:
dac |= 0x08;
break;
default:
return -EINVAL;
}
snd_soc_write(codec, WM8728_DACCTL, dac);
return 0;
}
static int wm8728_set_dai_fmt(struct snd_soc_dai *codec_dai,
unsigned int fmt)
{
struct snd_soc_codec *codec = codec_dai->codec;
u16 iface = snd_soc_read(codec, WM8728_IFCTL);
/* Currently only I2S is supported by the driver, though the
* hardware is more flexible.
*/
switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
case SND_SOC_DAIFMT_I2S:
iface |= 1;
break;
default:
return -EINVAL;
}
/* The hardware only support full slave mode */
switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
case SND_SOC_DAIFMT_CBS_CFS:
break;
default:
return -EINVAL;
}
switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
case SND_SOC_DAIFMT_NB_NF:
iface &= ~0x22;
break;
case SND_SOC_DAIFMT_IB_NF:
iface |= 0x20;
iface &= ~0x02;
break;
case SND_SOC_DAIFMT_NB_IF:
iface |= 0x02;
iface &= ~0x20;
break;
case SND_SOC_DAIFMT_IB_IF:
iface |= 0x22;
break;
default:
return -EINVAL;
}
snd_soc_write(codec, WM8728_IFCTL, iface);
return 0;
}
static int wm8728_set_bias_level(struct snd_soc_codec *codec,
enum snd_soc_bias_level level)
{
u16 reg;
int i;
switch (level) {
case SND_SOC_BIAS_ON:
case SND_SOC_BIAS_PREPARE:
case SND_SOC_BIAS_STANDBY:
if (codec->dapm.bias_level == SND_SOC_BIAS_OFF) {
/* Power everything up... */
reg = snd_soc_read(codec, WM8728_DACCTL);
snd_soc_write(codec, WM8728_DACCTL, reg & ~0x4);
/* ..then sync in the register cache. */
for (i = 0; i < ARRAY_SIZE(wm8728_reg_defaults); i++)
snd_soc_write(codec, i,
snd_soc_read(codec, i));
}
break;
case SND_SOC_BIAS_OFF:
reg = snd_soc_read(codec, WM8728_DACCTL);
snd_soc_write(codec, WM8728_DACCTL, reg | 0x4);
break;
}
codec->dapm.bias_level = level;
return 0;
}
#define WM8728_RATES (SNDRV_PCM_RATE_8000_192000)
#define WM8728_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
SNDRV_PCM_FMTBIT_S24_LE)
static const struct snd_soc_dai_ops wm8728_dai_ops = {
.hw_params = wm8728_hw_params,
.digital_mute = wm8728_mute,
.set_fmt = wm8728_set_dai_fmt,
};
static struct snd_soc_dai_driver wm8728_dai = {
.name = "wm8728-hifi",
.playback = {
.stream_name = "Playback",
.channels_min = 2,
.channels_max = 2,
.rates = WM8728_RATES,
.formats = WM8728_FORMATS,
},
.ops = &wm8728_dai_ops,
};
static int wm8728_suspend(struct snd_soc_codec *codec)
{
wm8728_set_bias_level(codec, SND_SOC_BIAS_OFF);
return 0;
}
static int wm8728_resume(struct snd_soc_codec *codec)
{
wm8728_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
return 0;
}
static int wm8728_probe(struct snd_soc_codec *codec)
{
struct wm8728_priv *wm8728 = snd_soc_codec_get_drvdata(codec);
int ret;
ret = snd_soc_codec_set_cache_io(codec, 7, 9, wm8728->control_type);
if (ret < 0) {
printk(KERN_ERR "wm8728: failed to configure cache I/O: %d\n",
ret);
return ret;
}
/* power on device */
wm8728_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
return ret;
}
static int wm8728_remove(struct snd_soc_codec *codec)
{
wm8728_set_bias_level(codec, SND_SOC_BIAS_OFF);
return 0;
}
static struct snd_soc_codec_driver soc_codec_dev_wm8728 = {
.probe = wm8728_probe,
.remove = wm8728_remove,
.suspend = wm8728_suspend,
.resume = wm8728_resume,
.set_bias_level = wm8728_set_bias_level,
.reg_cache_size = ARRAY_SIZE(wm8728_reg_defaults),
.reg_word_size = sizeof(u16),
.reg_cache_default = wm8728_reg_defaults,
.controls = wm8728_snd_controls,
.num_controls = ARRAY_SIZE(wm8728_snd_controls),
.dapm_widgets = wm8728_dapm_widgets,
.num_dapm_widgets = ARRAY_SIZE(wm8728_dapm_widgets),
.dapm_routes = wm8728_intercon,
.num_dapm_routes = ARRAY_SIZE(wm8728_intercon),
};
static const struct of_device_id wm8728_of_match[] = {
{ .compatible = "wlf,wm8728", },
{ }
};
MODULE_DEVICE_TABLE(of, wm8728_of_match);
#if defined(CONFIG_SPI_MASTER)
static int __devinit wm8728_spi_probe(struct spi_device *spi)
{
struct wm8728_priv *wm8728;
int ret;
wm8728 = kzalloc(sizeof(struct wm8728_priv), GFP_KERNEL);
if (wm8728 == NULL)
return -ENOMEM;
wm8728->control_type = SND_SOC_SPI;
spi_set_drvdata(spi, wm8728);
ret = snd_soc_register_codec(&spi->dev,
&soc_codec_dev_wm8728, &wm8728_dai, 1);
if (ret < 0)
kfree(wm8728);
return ret;
}
static int __devexit wm8728_spi_remove(struct spi_device *spi)
{
snd_soc_unregister_codec(&spi->dev);
kfree(spi_get_drvdata(spi));
return 0;
}
static struct spi_driver wm8728_spi_driver = {
.driver = {
.name = "wm8728",
.owner = THIS_MODULE,
.of_match_table = wm8728_of_match,
},
.probe = wm8728_spi_probe,
.remove = __devexit_p(wm8728_spi_remove),
};
#endif /* CONFIG_SPI_MASTER */
#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
static __devinit int wm8728_i2c_probe(struct i2c_client *i2c,
const struct i2c_device_id *id)
{
struct wm8728_priv *wm8728;
int ret;
wm8728 = kzalloc(sizeof(struct wm8728_priv), GFP_KERNEL);
if (wm8728 == NULL)
return -ENOMEM;
i2c_set_clientdata(i2c, wm8728);
wm8728->control_type = SND_SOC_I2C;
ret = snd_soc_register_codec(&i2c->dev,
&soc_codec_dev_wm8728, &wm8728_dai, 1);
if (ret < 0)
kfree(wm8728);
return ret;
}
static __devexit int wm8728_i2c_remove(struct i2c_client *client)
{
snd_soc_unregister_codec(&client->dev);
kfree(i2c_get_clientdata(client));
return 0;
}
static const struct i2c_device_id wm8728_i2c_id[] = {
{ "wm8728", 0 },
{ }
};
MODULE_DEVICE_TABLE(i2c, wm8728_i2c_id);
static struct i2c_driver wm8728_i2c_driver = {
.driver = {
.name = "wm8728",
.owner = THIS_MODULE,
.of_match_table = wm8728_of_match,
},
.probe = wm8728_i2c_probe,
.remove = __devexit_p(wm8728_i2c_remove),
.id_table = wm8728_i2c_id,
};
#endif
static int __init wm8728_modinit(void)
{
int ret = 0;
#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
ret = i2c_add_driver(&wm8728_i2c_driver);
if (ret != 0) {
printk(KERN_ERR "Failed to register wm8728 I2C driver: %d\n",
ret);
}
#endif
#if defined(CONFIG_SPI_MASTER)
ret = spi_register_driver(&wm8728_spi_driver);
if (ret != 0) {
printk(KERN_ERR "Failed to register wm8728 SPI driver: %d\n",
ret);
}
#endif
return ret;
}
module_init(wm8728_modinit);
static void __exit wm8728_exit(void)
{
#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
i2c_del_driver(&wm8728_i2c_driver);
#endif
#if defined(CONFIG_SPI_MASTER)
spi_unregister_driver(&wm8728_spi_driver);
#endif
}
module_exit(wm8728_exit);
MODULE_DESCRIPTION("ASoC WM8728 driver");
MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
MODULE_LICENSE("GPL");
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