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ASoC: Add WM8776 CODEC driver

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The WM8776 is a high performance, stereo audio CODEC with five channel
input selector. The WM8776 is ideal for surround sound processing
applications for home hi-fi, DVD-RW and other audio visual equipment.

This driver implements support for most WM8776 features - currently the
ADC automatic level control/limiter functionality is omitted.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
This commit is contained in:
Mark Brown 2009-08-04 23:50:16 +01:00
parent 15b5bdaeeb
commit 924914ee95
4 changed files with 838 additions and 0 deletions
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4
sound/soc/codecs/Kconfig
View File

@ -38,6 +38,7 @@ config SND_SOC_ALL_CODECS
select SND_SOC_WM8731 if SND_SOC_I2C_AND_SPI
select SND_SOC_WM8750 if SND_SOC_I2C_AND_SPI
select SND_SOC_WM8753 if SND_SOC_I2C_AND_SPI
select SND_SOC_WM8776 if SND_SOC_I2C_AND_SPI
select SND_SOC_WM8900 if I2C
select SND_SOC_WM8903 if I2C
select SND_SOC_WM8940 if I2C
@ -158,6 +159,9 @@ config SND_SOC_WM8750
config SND_SOC_WM8753
tristate
config SND_SOC_WM8776
tristate
config SND_SOC_WM8900
tristate

2
sound/soc/codecs/Makefile
View File

@ -26,6 +26,7 @@ snd-soc-wm8728-objs := wm8728.o
snd-soc-wm8731-objs := wm8731.o
snd-soc-wm8750-objs := wm8750.o
snd-soc-wm8753-objs := wm8753.o
snd-soc-wm8776-objs := wm8776.o
snd-soc-wm8900-objs := wm8900.o
snd-soc-wm8903-objs := wm8903.o
snd-soc-wm8940-objs := wm8940.o
@ -71,6 +72,7 @@ obj-$(CONFIG_SND_SOC_WM8728) += snd-soc-wm8728.o
obj-$(CONFIG_SND_SOC_WM8731) += snd-soc-wm8731.o
obj-$(CONFIG_SND_SOC_WM8750) += snd-soc-wm8750.o
obj-$(CONFIG_SND_SOC_WM8753) += snd-soc-wm8753.o
obj-$(CONFIG_SND_SOC_WM8776) += snd-soc-wm8776.o
obj-$(CONFIG_SND_SOC_WM8900) += snd-soc-wm8900.o
obj-$(CONFIG_SND_SOC_WM8903) += snd-soc-wm8903.o
obj-$(CONFIG_SND_SOC_WM8971) += snd-soc-wm8971.o

781
sound/soc/codecs/wm8776.c Normal file
View File

@ -0,0 +1,781 @@
/*
* wm8776.c -- WM8776 ALSA SoC Audio driver
*
* Copyright 2009 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.
*
* TODO: Input ALC/limiter support
*/
#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 <sound/core.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>
#include <sound/soc-dapm.h>
#include <sound/initval.h>
#include <sound/tlv.h>
#include "wm8776.h"
static struct snd_soc_codec *wm8776_codec;
struct snd_soc_codec_device soc_codec_dev_wm8776;
/* codec private data */
struct wm8776_priv {
struct snd_soc_codec codec;
u16 reg_cache[WM8776_CACHEREGNUM];
int sysclk[2];
};
#ifdef CONFIG_SPI_MASTER
static int wm8776_spi_write(struct spi_device *spi, const char *data, int len);
#endif
static const u16 wm8776_reg[WM8776_CACHEREGNUM] = {
0x79, 0x79, 0x79, 0xff, 0xff, /* 4 */
0xff, 0x00, 0x90, 0x00, 0x00, /* 9 */
0x22, 0x22, 0x22, 0x08, 0xcf, /* 14 */
0xcf, 0x7b, 0x00, 0x32, 0x00, /* 19 */
0xa6, 0x01, 0x01
};
/*
* read wm8776 register cache
*/
static inline unsigned int wm8776_read_reg_cache(struct snd_soc_codec *codec,
unsigned int reg)
{
u16 *cache = codec->reg_cache;
if (reg >= WM8776_CACHEREGNUM)
return -1;
return cache[reg];
}
/*
* write wm8776 register cache
*/
static inline void wm8776_write_reg_cache(struct snd_soc_codec *codec,
u16 reg, unsigned int value)
{
u16 *cache = codec->reg_cache;
if (reg >= WM8776_CACHEREGNUM)
return;
cache[reg] = value;
}
/*
* write to the WM8776 register space
*/
static int wm8776_write(struct snd_soc_codec *codec, unsigned int reg,
unsigned int value)
{
u8 data[2];
data[0] = (reg << 1) | ((value >> 8) & 0x0001);
data[1] = value & 0x00ff;
wm8776_write_reg_cache(codec, reg, value);
if (codec->hw_write(codec->control_data, data, 2) == 2)
return 0;
else
return -EIO;
}
static int wm8776_reset(struct snd_soc_codec *codec)
{
return wm8776_write(codec, WM8776_RESET, 0);
}
static const DECLARE_TLV_DB_SCALE(hp_tlv, -12100, 100, 1);
static const DECLARE_TLV_DB_SCALE(dac_tlv, -12750, 50, 1);
static const DECLARE_TLV_DB_SCALE(adc_tlv, -10350, 50, 1);
static const struct snd_kcontrol_new wm8776_snd_controls[] = {
SOC_DOUBLE_R_TLV("Headphone Playback Volume", WM8776_HPLVOL, WM8776_HPRVOL,
0, 127, 0, hp_tlv),
SOC_DOUBLE_R_TLV("Digital Playback Volume", WM8776_DACLVOL, WM8776_DACRVOL,
0, 255, 0, dac_tlv),
SOC_SINGLE("Digital Playback ZC Switch", WM8776_DACCTRL1, 0, 1, 0),
SOC_SINGLE("Deemphasis Switch", WM8776_DACCTRL2, 0, 1, 0),
SOC_DOUBLE_R_TLV("Capture Volume", WM8776_ADCLVOL, WM8776_ADCRVOL,
0, 255, 0, adc_tlv),
SOC_DOUBLE("Capture Switch", WM8776_ADCMUX, 7, 6, 1, 1),
SOC_DOUBLE_R("Capture ZC Switch", WM8776_ADCLVOL, WM8776_ADCRVOL, 8, 1, 0),
SOC_SINGLE("Capture HPF Switch", WM8776_ADCIFCTRL, 8, 1, 1),
};
static const struct snd_kcontrol_new inmix_controls[] = {
SOC_DAPM_SINGLE("AIN1 Switch", WM8776_ADCMUX, 0, 1, 0),
SOC_DAPM_SINGLE("AIN2 Switch", WM8776_ADCMUX, 1, 1, 0),
SOC_DAPM_SINGLE("AIN3 Switch", WM8776_ADCMUX, 2, 1, 0),
SOC_DAPM_SINGLE("AIN4 Switch", WM8776_ADCMUX, 3, 1, 0),
SOC_DAPM_SINGLE("AIN5 Switch", WM8776_ADCMUX, 4, 1, 0),
};
static const struct snd_kcontrol_new outmix_controls[] = {
SOC_DAPM_SINGLE("DAC Switch", WM8776_OUTMUX, 0, 1, 0),
SOC_DAPM_SINGLE("AUX Switch", WM8776_OUTMUX, 1, 1, 0),
SOC_DAPM_SINGLE("Bypass Switch", WM8776_OUTMUX, 2, 1, 0),
};
static const struct snd_soc_dapm_widget wm8776_dapm_widgets[] = {
SND_SOC_DAPM_INPUT("AUX"),
SND_SOC_DAPM_INPUT("AUX"),
SND_SOC_DAPM_INPUT("AIN1"),
SND_SOC_DAPM_INPUT("AIN2"),
SND_SOC_DAPM_INPUT("AIN3"),
SND_SOC_DAPM_INPUT("AIN4"),
SND_SOC_DAPM_INPUT("AIN5"),
SND_SOC_DAPM_MIXER("Input Mixer", WM8776_PWRDOWN, 6, 1,
inmix_controls, ARRAY_SIZE(inmix_controls)),
SND_SOC_DAPM_ADC("ADC", "Capture", WM8776_PWRDOWN, 1, 1),
SND_SOC_DAPM_DAC("DAC", "Playback", WM8776_PWRDOWN, 2, 1),
SND_SOC_DAPM_MIXER("Output Mixer", SND_SOC_NOPM, 0, 0,
outmix_controls, ARRAY_SIZE(outmix_controls)),
SND_SOC_DAPM_PGA("Headphone PGA", WM8776_PWRDOWN, 3, 1, NULL, 0),
SND_SOC_DAPM_OUTPUT("VOUT"),
SND_SOC_DAPM_OUTPUT("HPOUTL"),
SND_SOC_DAPM_OUTPUT("HPOUTR"),
};
static const struct snd_soc_dapm_route routes[] = {
{ "Input Mixer", "AIN1 Switch", "AIN1" },
{ "Input Mixer", "AIN2 Switch", "AIN2" },
{ "Input Mixer", "AIN3 Switch", "AIN3" },
{ "Input Mixer", "AIN4 Switch", "AIN4" },
{ "Input Mixer", "AIN5 Switch", "AIN5" },
{ "ADC", NULL, "Input Mixer" },
{ "Output Mixer", "DAC Switch", "DAC" },
{ "Output Mixer", "AUX Switch", "AUX" },
{ "Output Mixer", "Bypass Switch", "Input Mixer" },
{ "VOUT", NULL, "Output Mixer" },
{ "Headphone PGA", NULL, "Output Mixer" },
{ "HPOUTL", NULL, "Headphone PGA" },
{ "HPOUTR", NULL, "Headphone PGA" },
};
static int wm8776_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
{
struct snd_soc_codec *codec = dai->codec;
int reg, iface, master;
switch (dai->id) {
case WM8776_DAI_DAC:
reg = WM8776_DACIFCTRL;
master = 0x80;
break;
case WM8776_DAI_ADC:
reg = WM8776_ADCIFCTRL;
master = 0x100;
break;
default:
return -EINVAL;
}
iface = 0;
switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
case SND_SOC_DAIFMT_CBM_CFM:
break;
case SND_SOC_DAIFMT_CBS_CFS:
master = 0;
break;
default:
return -EINVAL;
}
switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
case SND_SOC_DAIFMT_I2S:
iface |= 0x0002;
break;
case SND_SOC_DAIFMT_RIGHT_J:
break;
case SND_SOC_DAIFMT_LEFT_J:
iface |= 0x0001;
break;
/* FIXME: CHECK A/B */
case SND_SOC_DAIFMT_DSP_A:
iface |= 0x0003;
break;
case SND_SOC_DAIFMT_DSP_B:
iface |= 0x0007;
break;
default:
return -EINVAL;
}
switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
case SND_SOC_DAIFMT_NB_NF:
break;
case SND_SOC_DAIFMT_IB_IF:
iface |= 0x00c;
break;
case SND_SOC_DAIFMT_IB_NF:
iface |= 0x008;
break;
case SND_SOC_DAIFMT_NB_IF:
iface |= 0x004;
break;
default:
return -EINVAL;
}
/* Finally, write out the values */
snd_soc_update_bits(codec, reg, 0xf, iface);
snd_soc_update_bits(codec, WM8776_MSTRCTRL, 0x180, master);
return 0;
}
static int mclk_ratios[] = {
128,
192,
256,
384,
512,
768,
};
static int wm8776_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;
struct wm8776_priv *wm8776 = codec->private_data;
int iface_reg, iface;
int ratio_shift, master;
int i;
iface = 0;
switch (dai->id) {
case WM8776_DAI_DAC:
iface_reg = WM8776_DACIFCTRL;
master = 0x80;
ratio_shift = 4;
break;
case WM8776_DAI_ADC:
iface_reg = WM8776_ADCIFCTRL;
master = 0x100;
ratio_shift = 0;
break;
default:
return -EINVAL;
}
/* Set word length */
switch (params_format(params)) {
case SNDRV_PCM_FORMAT_S16_LE:
break;
case SNDRV_PCM_FORMAT_S20_3LE:
iface |= 0x10;
break;
case SNDRV_PCM_FORMAT_S24_LE:
iface |= 0x20;
break;
case SNDRV_PCM_FORMAT_S32_LE:
iface |= 0x30;
break;
}
/* Only need to set MCLK/LRCLK ratio if we're master */
if (snd_soc_read(codec, WM8776_MSTRCTRL) & master) {
for (i = 0; i < ARRAY_SIZE(mclk_ratios); i++) {
if (wm8776->sysclk[dai->id] / params_rate(params)
== mclk_ratios[i])
break;
}
if (i == ARRAY_SIZE(mclk_ratios)) {
dev_err(codec->dev,
"Unable to configure MCLK ratio %d/%d\n",
wm8776->sysclk[dai->id], params_rate(params));
return -EINVAL;
}
dev_dbg(codec->dev, "MCLK is %dfs\n", mclk_ratios[i]);
snd_soc_update_bits(codec, WM8776_MSTRCTRL,
0x7 << ratio_shift, i << ratio_shift);
} else {
dev_dbg(codec->dev, "DAI in slave mode\n");
}
snd_soc_update_bits(codec, iface_reg, 0x30, iface);
return 0;
}
static int wm8776_mute(struct snd_soc_dai *dai, int mute)
{
struct snd_soc_codec *codec = dai->codec;
return snd_soc_write(codec, WM8776_DACMUTE, !!mute);
}
static int wm8776_set_sysclk(struct snd_soc_dai *dai,
int clk_id, unsigned int freq, int dir)
{
struct snd_soc_codec *codec = dai->codec;
struct wm8776_priv *wm8776 = codec->private_data;
BUG_ON(dai->id >= ARRAY_SIZE(wm8776->sysclk));
wm8776->sysclk[dai->id] = freq;
return 0;
}
static int wm8776_set_bias_level(struct snd_soc_codec *codec,
enum snd_soc_bias_level level)
{
switch (level) {
case SND_SOC_BIAS_ON:
break;
case SND_SOC_BIAS_PREPARE:
break;
case SND_SOC_BIAS_STANDBY:
if (codec->bias_level == SND_SOC_BIAS_OFF) {
/* Disable the global powerdown; DAPM does the rest */
snd_soc_update_bits(codec, WM8776_PWRDOWN, 1, 0);
}
break;
case SND_SOC_BIAS_OFF:
snd_soc_update_bits(codec, WM8776_PWRDOWN, 1, 1);
break;
}
codec->bias_level = level;
return 0;
}
#define WM8776_RATES (SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 |\
SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_88200 |\
SNDRV_PCM_RATE_96000)
#define WM8776_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE)
static struct snd_soc_dai_ops wm8776_dac_ops = {
.digital_mute = wm8776_mute,
.hw_params = wm8776_hw_params,
.set_fmt = wm8776_set_fmt,
.set_sysclk = wm8776_set_sysclk,
};
static struct snd_soc_dai_ops wm8776_adc_ops = {
.hw_params = wm8776_hw_params,
.set_fmt = wm8776_set_fmt,
.set_sysclk = wm8776_set_sysclk,
};
struct snd_soc_dai wm8776_dai[] = {
{
.name = "WM8776 Playback",
.id = WM8776_DAI_DAC,
.playback = {
.stream_name = "Playback",
.channels_min = 2,
.channels_max = 2,
.rates = WM8776_RATES,
.formats = WM8776_FORMATS,
},
.ops = &wm8776_dac_ops,
},
{
.name = "WM8776 Capture",
.id = WM8776_DAI_ADC,
.capture = {
.stream_name = "Capture",
.channels_min = 2,
.channels_max = 2,
.rates = WM8776_RATES,
.formats = WM8776_FORMATS,
},
.ops = &wm8776_adc_ops,
},
};
EXPORT_SYMBOL_GPL(wm8776_dai);
#ifdef CONFIG_PM
static int wm8776_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;
wm8776_set_bias_level(codec, SND_SOC_BIAS_OFF);
return 0;
}
static int wm8776_resume(struct platform_device *pdev)
{
struct snd_soc_device *socdev = platform_get_drvdata(pdev);
struct snd_soc_codec *codec = socdev->card->codec;
int i;
u8 data[2];
u16 *cache = codec->reg_cache;
/* Sync reg_cache with the hardware */
for (i = 0; i < ARRAY_SIZE(wm8776_reg); i++) {
data[0] = (i << 1) | ((cache[i] >> 8) & 0x0001);
data[1] = cache[i] & 0x00ff;
codec->hw_write(codec->control_data, data, 2);
}
wm8776_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
return 0;
}
#else
#define wm8776_suspend NULL
#define wm8776_resume NULL
#endif
static int wm8776_probe(struct platform_device *pdev)
{
struct snd_soc_device *socdev = platform_get_drvdata(pdev);
struct snd_soc_codec *codec;
int ret = 0;
if (wm8776_codec == NULL) {
dev_err(&pdev->dev, "Codec device not registered\n");
return -ENODEV;
}
socdev->card->codec = wm8776_codec;
codec = wm8776_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, wm8776_snd_controls,
ARRAY_SIZE(wm8776_snd_controls));
snd_soc_dapm_new_controls(codec, wm8776_dapm_widgets,
ARRAY_SIZE(wm8776_dapm_widgets));
snd_soc_dapm_add_routes(codec, routes, ARRAY_SIZE(routes));
ret = snd_soc_init_card(socdev);
if (ret < 0) {
dev_err(codec->dev, "failed to register card: %d\n", ret);
goto card_err;
}
return ret;
card_err:
snd_soc_free_pcms(socdev);
snd_soc_dapm_free(socdev);
pcm_err:
return ret;
}
/* power down chip */
static int wm8776_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_wm8776 = {
.probe = wm8776_probe,
.remove = wm8776_remove,
.suspend = wm8776_suspend,
.resume = wm8776_resume,
};
EXPORT_SYMBOL_GPL(soc_codec_dev_wm8776);
static int wm8776_register(struct wm8776_priv *wm8776)
{
int ret, i;
struct snd_soc_codec *codec = &wm8776->codec;
if (wm8776_codec) {
dev_err(codec->dev, "Another WM8776 is registered\n");
ret = -EINVAL;
goto err;
}
mutex_init(&codec->mutex);
INIT_LIST_HEAD(&codec->dapm_widgets);
INIT_LIST_HEAD(&codec->dapm_paths);
codec->private_data = wm8776;
codec->name = "WM8776";
codec->owner = THIS_MODULE;
codec->read = wm8776_read_reg_cache;
codec->write = wm8776_write;
codec->bias_level = SND_SOC_BIAS_OFF;
codec->set_bias_level = wm8776_set_bias_level;
codec->dai = wm8776_dai;
codec->num_dai = ARRAY_SIZE(wm8776_dai);
codec->reg_cache_size = WM8776_CACHEREGNUM;
codec->reg_cache = &wm8776->reg_cache;
memcpy(codec->reg_cache, wm8776_reg, sizeof(wm8776_reg));
for (i = 0; i < ARRAY_SIZE(wm8776_dai); i++)
wm8776_dai[i].dev = codec->dev;
ret = wm8776_reset(codec);
if (ret < 0) {
dev_err(codec->dev, "Failed to issue reset: %d\n", ret);
goto err;
}
wm8776_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
/* Latch the update bits; right channel only since we always
* update both. */
snd_soc_update_bits(codec, WM8776_HPRVOL, 0x100, 0x100);
snd_soc_update_bits(codec, WM8776_DACRVOL, 0x100, 0x100);
wm8776_codec = codec;
ret = snd_soc_register_codec(codec);
if (ret != 0) {
dev_err(codec->dev, "Failed to register codec: %d\n", ret);
goto err;
}
ret = snd_soc_register_dais(wm8776_dai, ARRAY_SIZE(wm8776_dai));
if (ret != 0) {
dev_err(codec->dev, "Failed to register DAIs: %d\n", ret);
goto err_codec;
}
return 0;
err_codec:
snd_soc_unregister_codec(codec);
err:
kfree(wm8776);
return ret;
}
static void wm8776_unregister(struct wm8776_priv *wm8776)
{
wm8776_set_bias_level(&wm8776->codec, SND_SOC_BIAS_OFF);
snd_soc_unregister_dais(wm8776_dai, ARRAY_SIZE(wm8776_dai));
snd_soc_unregister_codec(&wm8776->codec);
kfree(wm8776);
wm8776_codec = NULL;
}
#if defined(CONFIG_SPI_MASTER)
static int wm8776_spi_write(struct spi_device *spi, const char *data, int len)
{
struct spi_transfer t;
struct spi_message m;
u8 msg[2];
if (len <= 0)
return 0;
msg[0] = data[0];
msg[1] = data[1];
spi_message_init(&m);
memset(&t, 0, (sizeof t));
t.tx_buf = &msg[0];
t.len = len;
spi_message_add_tail(&t, &m);
spi_sync(spi, &m);
return len;
}
static int __devinit wm8776_spi_probe(struct spi_device *spi)
{
struct snd_soc_codec *codec;
struct wm8776_priv *wm8776;
wm8776 = kzalloc(sizeof(struct wm8776_priv), GFP_KERNEL);
if (wm8776 == NULL)
return -ENOMEM;
codec = &wm8776->codec;
codec->control_data = spi;
codec->hw_write = (hw_write_t)wm8776_spi_write;
codec->dev = &spi->dev;
dev_set_drvdata(&spi->dev, wm8776);
return wm8776_register(wm8776);
}
static int __devexit wm8776_spi_remove(struct spi_device *spi)
{
struct wm8776_priv *wm8776 = dev_get_drvdata(&spi->dev);
wm8776_unregister(wm8776);
return 0;
}
#ifdef CONFIG_PM
static int wm8776_spi_suspend(struct spi_device *spi, pm_message_t msg)
{
return snd_soc_suspend_device(&spi->dev);
}
static int wm8776_spi_resume(struct spi_device *spi)
{
return snd_soc_resume_device(&spi->dev);
}
#else
#define wm8776_spi_suspend NULL
#define wm8776_spi_resume NULL
#endif
static struct spi_driver wm8776_spi_driver = {
.driver = {
.name = "wm8776",
.bus = &spi_bus_type,
.owner = THIS_MODULE,
},
.probe = wm8776_spi_probe,
.suspend = wm8776_spi_suspend,
.resume = wm8776_spi_resume,
.remove = __devexit_p(wm8776_spi_remove),
};
#endif /* CONFIG_SPI_MASTER */
#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
static __devinit int wm8776_i2c_probe(struct i2c_client *i2c,
const struct i2c_device_id *id)
{
struct wm8776_priv *wm8776;
struct snd_soc_codec *codec;
wm8776 = kzalloc(sizeof(struct wm8776_priv), GFP_KERNEL);
if (wm8776 == NULL)
return -ENOMEM;
codec = &wm8776->codec;
codec->hw_write = (hw_write_t)i2c_master_send;
i2c_set_clientdata(i2c, wm8776);
codec->control_data = i2c;
codec->dev = &i2c->dev;
return wm8776_register(wm8776);
}
static __devexit int wm8776_i2c_remove(struct i2c_client *client)
{
struct wm8776_priv *wm8776 = i2c_get_clientdata(client);
wm8776_unregister(wm8776);
return 0;
}
#ifdef CONFIG_PM
static int wm8776_i2c_suspend(struct i2c_client *i2c, pm_message_t msg)
{
return snd_soc_suspend_device(&i2c->dev);
}
static int wm8776_i2c_resume(struct i2c_client *i2c)
{
return snd_soc_resume_device(&i2c->dev);
}
#else
#define wm8776_i2c_suspend NULL
#define wm8776_i2c_resume NULL
#endif
static const struct i2c_device_id wm8776_i2c_id[] = {
{ "wm8776", 0 },
{ }
};
MODULE_DEVICE_TABLE(i2c, wm8776_i2c_id);
static struct i2c_driver wm8776_i2c_driver = {
.driver = {
.name = "wm8776",
.owner = THIS_MODULE,
},
.probe = wm8776_i2c_probe,
.remove = __devexit_p(wm8776_i2c_remove),
.suspend = wm8776_i2c_suspend,
.resume = wm8776_i2c_resume,
.id_table = wm8776_i2c_id,
};
#endif
static int __init wm8776_modinit(void)
{
int ret;
#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
ret = i2c_add_driver(&wm8776_i2c_driver);
if (ret != 0) {
printk(KERN_ERR "Failed to register WM8776 I2C driver: %d\n",
ret);
}
#endif
#if defined(CONFIG_SPI_MASTER)
ret = spi_register_driver(&wm8776_spi_driver);
if (ret != 0) {
printk(KERN_ERR "Failed to register WM8776 SPI driver: %d\n",
ret);
}
#endif
return 0;
}
module_init(wm8776_modinit);
static void __exit wm8776_exit(void)
{
#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
i2c_del_driver(&wm8776_i2c_driver);
#endif
#if defined(CONFIG_SPI_MASTER)
spi_unregister_driver(&wm8776_spi_driver);
#endif
}
module_exit(wm8776_exit);
MODULE_DESCRIPTION("ASoC WM8776 driver");
MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
MODULE_LICENSE("GPL");

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sound/soc/codecs/wm8776.h Normal file
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/*
* wm8776.h -- WM8776 ASoC driver
*
* Copyright 2009 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.
*/
#ifndef _WM8776_H
#define _WM8776_H
/* Registers */
#define WM8776_HPLVOL 0x00
#define WM8776_HPRVOL 0x01
#define WM8776_HPMASTER 0x02
#define WM8776_DACLVOL 0x03
#define WM8776_DACRVOL 0x04
#define WM8776_DACMASTER 0x05
#define WM8776_PHASESWAP 0x06
#define WM8776_DACCTRL1 0x07
#define WM8776_DACMUTE 0x08
#define WM8776_DACCTRL2 0x09
#define WM8776_DACIFCTRL 0x0a
#define WM8776_ADCIFCTRL 0x0b
#define WM8776_MSTRCTRL 0x0c
#define WM8776_PWRDOWN 0x0d
#define WM8776_ADCLVOL 0x0e
#define WM8776_ADCRVOL 0x0f
#define WM8776_ALCCTRL1 0x10
#define WM8776_ALCCTRL2 0x11
#define WM8776_ALCCTRL3 0x12
#define WM8776_NOISEGATE 0x13
#define WM8776_LIMITER 0x14
#define WM8776_ADCMUX 0x15
#define WM8776_OUTMUX 0x16
#define WM8776_RESET 0x17
#define WM8776_CACHEREGNUM 0x17
#define WM8776_DAI_DAC 0
#define WM8776_DAI_ADC 1
extern struct snd_soc_dai wm8776_dai[];
extern struct snd_soc_codec_device soc_codec_dev_wm8776;
#endif