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linux-next/sound/soc/codecs/wm8776.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

704 lines
16 KiB
C

/*
* 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
};
static int wm8776_reset(struct snd_soc_codec *codec)
{
return snd_soc_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 = snd_soc_codec_get_drvdata(codec);
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 = snd_soc_codec_get_drvdata(codec);
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++) {
if (cache[i] == wm8776_reg[i])
continue;
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));
return ret;
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,
enum snd_soc_control_type control)
{
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);
snd_soc_codec_set_drvdata(codec, wm8776);
codec->name = "WM8776";
codec->owner = THIS_MODULE;
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));
ret = snd_soc_codec_set_cache_io(codec, 7, 9, control);
if (ret < 0) {
dev_err(codec->dev, "Failed to set cache I/O: %d\n", ret);
goto err;
}
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, SND_SOC_SPI);
}
static int __devexit wm8776_spi_remove(struct spi_device *spi)
{
struct wm8776_priv *wm8776 = dev_get_drvdata(&spi->dev);
wm8776_unregister(wm8776);
return 0;
}
static struct spi_driver wm8776_spi_driver = {
.driver = {
.name = "wm8776",
.bus = &spi_bus_type,
.owner = THIS_MODULE,
},
.probe = wm8776_spi_probe,
.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, SND_SOC_I2C);
}
static __devexit int wm8776_i2c_remove(struct i2c_client *client)
{
struct wm8776_priv *wm8776 = i2c_get_clientdata(client);
wm8776_unregister(wm8776);
return 0;
}
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),
.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");