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linux/sound/soc/codecs/wm8728.c
Eric Miao 6335d05548 ASoC: make ops a pointer in 'struct snd_soc_dai' 
Considering the fact that most cpu_dai or codec_dai are using a same
'snd_soc_dai_ops' for several similar interfaces, 'ops' would be better
made a pointer instead, to make sharing easier and code a bit cleaner.

The patch below is rather preliminary since the asoc tree is being
actively developed, and this touches almost every piece of code,
(and possibly many others in development need to be changed as
well). Building of all codecs are OK, yet to every SoC, I didn't test
that.

Signed-off-by: Eric Miao <eric.miao@marvell.com>
Acked-by: Timur Tabi <timur@freescale.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
2009-03-04 22:29:47 +00:00

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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 <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 "wm8728.h"
struct snd_soc_codec_device soc_codec_dev_wm8728;
/*
* 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,
};
static inline unsigned int wm8728_read_reg_cache(struct snd_soc_codec *codec,
unsigned int reg)
{
u16 *cache = codec->reg_cache;
BUG_ON(reg >= ARRAY_SIZE(wm8728_reg_defaults));
return cache[reg];
}
static inline void wm8728_write_reg_cache(struct snd_soc_codec *codec,
u16 reg, unsigned int value)
{
u16 *cache = codec->reg_cache;
BUG_ON(reg >= ARRAY_SIZE(wm8728_reg_defaults));
cache[reg] = value;
}
/*
* write to the WM8728 register space
*/
static int wm8728_write(struct snd_soc_codec *codec, unsigned int reg,
unsigned int value)
{
u8 data[2];
/* data is
* D15..D9 WM8728 register offset
* D8...D0 register data
*/
data[0] = (reg << 1) | ((value >> 8) & 0x0001);
data[1] = value & 0x00ff;
wm8728_write_reg_cache(codec, reg, value);
if (codec->hw_write(codec->control_data, data, 2) == 2)
return 0;
else
return -EIO;
}
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 intercon[] = {
{"VOUTL", NULL, "DAC"},
{"VOUTR", NULL, "DAC"},
};
static int wm8728_add_widgets(struct snd_soc_codec *codec)
{
snd_soc_dapm_new_controls(codec, wm8728_dapm_widgets,
ARRAY_SIZE(wm8728_dapm_widgets));
snd_soc_dapm_add_routes(codec, intercon, ARRAY_SIZE(intercon));
snd_soc_dapm_new_widgets(codec);
return 0;
}
static int wm8728_mute(struct snd_soc_dai *dai, int mute)
{
struct snd_soc_codec *codec = dai->codec;
u16 mute_reg = wm8728_read_reg_cache(codec, WM8728_DACCTL);
if (mute)
wm8728_write(codec, WM8728_DACCTL, mute_reg | 1);
else
wm8728_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_pcm_runtime *rtd = substream->private_data;
struct snd_soc_device *socdev = rtd->socdev;
struct snd_soc_codec *codec = socdev->card->codec;
u16 dac = wm8728_read_reg_cache(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;
}
wm8728_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 = wm8728_read_reg_cache(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;
}
wm8728_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->bias_level == SND_SOC_BIAS_OFF) {
/* Power everything up... */
reg = wm8728_read_reg_cache(codec, WM8728_DACCTL);
wm8728_write(codec, WM8728_DACCTL, reg & ~0x4);
/* ..then sync in the register cache. */
for (i = 0; i < ARRAY_SIZE(wm8728_reg_defaults); i++)
wm8728_write(codec, i,
wm8728_read_reg_cache(codec, i));
}
break;
case SND_SOC_BIAS_OFF:
reg = wm8728_read_reg_cache(codec, WM8728_DACCTL);
wm8728_write(codec, WM8728_DACCTL, reg | 0x4);
break;
}
codec->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 struct snd_soc_dai_ops wm8728_dai_ops = {
.hw_params = wm8728_hw_params,
.digital_mute = wm8728_mute,
.set_fmt = wm8728_set_dai_fmt,
};
struct snd_soc_dai wm8728_dai = {
.name = "WM8728",
.playback = {
.stream_name = "Playback",
.channels_min = 2,
.channels_max = 2,
.rates = WM8728_RATES,
.formats = WM8728_FORMATS,
},
.ops = &wm8728_dai_ops,
};
EXPORT_SYMBOL_GPL(wm8728_dai);
static int wm8728_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;
wm8728_set_bias_level(codec, SND_SOC_BIAS_OFF);
return 0;
}
static int wm8728_resume(struct platform_device *pdev)
{
struct snd_soc_device *socdev = platform_get_drvdata(pdev);
struct snd_soc_codec *codec = socdev->card->codec;
wm8728_set_bias_level(codec, codec->suspend_bias_level);
return 0;
}
/*
* initialise the WM8728 driver
* register the mixer and dsp interfaces with the kernel
*/
static int wm8728_init(struct snd_soc_device *socdev)
{
struct snd_soc_codec *codec = socdev->card->codec;
int ret = 0;
codec->name = "WM8728";
codec->owner = THIS_MODULE;
codec->read = wm8728_read_reg_cache;
codec->write = wm8728_write;
codec->set_bias_level = wm8728_set_bias_level;
codec->dai = &wm8728_dai;
codec->num_dai = 1;
codec->bias_level = SND_SOC_BIAS_OFF;
codec->reg_cache_size = ARRAY_SIZE(wm8728_reg_defaults);
codec->reg_cache = kmemdup(wm8728_reg_defaults,
sizeof(wm8728_reg_defaults),
GFP_KERNEL);
if (codec->reg_cache == NULL)
return -ENOMEM;
/* register pcms */
ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1);
if (ret < 0) {
printk(KERN_ERR "wm8728: failed to create pcms\n");
goto pcm_err;
}
/* power on device */
wm8728_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
snd_soc_add_controls(codec, wm8728_snd_controls,
ARRAY_SIZE(wm8728_snd_controls));
wm8728_add_widgets(codec);
ret = snd_soc_init_card(socdev);
if (ret < 0) {
printk(KERN_ERR "wm8728: failed to register card\n");
goto card_err;
}
return ret;
card_err:
snd_soc_free_pcms(socdev);
snd_soc_dapm_free(socdev);
pcm_err:
kfree(codec->reg_cache);
return ret;
}
static struct snd_soc_device *wm8728_socdev;
#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
/*
* WM8728 2 wire address is determined by GPIO5
* state during powerup.
* low = 0x1a
* high = 0x1b
*/
static int wm8728_i2c_probe(struct i2c_client *i2c,
const struct i2c_device_id *id)
{
struct snd_soc_device *socdev = wm8728_socdev;
struct snd_soc_codec *codec = socdev->card->codec;
int ret;
i2c_set_clientdata(i2c, codec);
codec->control_data = i2c;
ret = wm8728_init(socdev);
if (ret < 0)
pr_err("failed to initialise WM8728\n");
return ret;
}
static int wm8728_i2c_remove(struct i2c_client *client)
{
struct snd_soc_codec *codec = i2c_get_clientdata(client);
kfree(codec->reg_cache);
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 I2C Codec",
.owner = THIS_MODULE,
},
.probe = wm8728_i2c_probe,
.remove = wm8728_i2c_remove,
.id_table = wm8728_i2c_id,
};
static int wm8728_add_i2c_device(struct platform_device *pdev,
const struct wm8728_setup_data *setup)
{
struct i2c_board_info info;
struct i2c_adapter *adapter;
struct i2c_client *client;
int ret;
ret = i2c_add_driver(&wm8728_i2c_driver);
if (ret != 0) {
dev_err(&pdev->dev, "can't add i2c driver\n");
return ret;
}
memset(&info, 0, sizeof(struct i2c_board_info));
info.addr = setup->i2c_address;
strlcpy(info.type, "wm8728", I2C_NAME_SIZE);
adapter = i2c_get_adapter(setup->i2c_bus);
if (!adapter) {
dev_err(&pdev->dev, "can't get i2c adapter %d\n",
setup->i2c_bus);
goto err_driver;
}
client = i2c_new_device(adapter, &info);
i2c_put_adapter(adapter);
if (!client) {
dev_err(&pdev->dev, "can't add i2c device at 0x%x\n",
(unsigned int)info.addr);
goto err_driver;
}
return 0;
err_driver:
i2c_del_driver(&wm8728_i2c_driver);
return -ENODEV;
}
#endif
#if defined(CONFIG_SPI_MASTER)
static int __devinit wm8728_spi_probe(struct spi_device *spi)
{
struct snd_soc_device *socdev = wm8728_socdev;
struct snd_soc_codec *codec = socdev->card->codec;
int ret;
codec->control_data = spi;
ret = wm8728_init(socdev);
if (ret < 0)
dev_err(&spi->dev, "failed to initialise WM8728\n");
return ret;
}
static int __devexit wm8728_spi_remove(struct spi_device *spi)
{
return 0;
}
static struct spi_driver wm8728_spi_driver = {
.driver = {
.name = "wm8728",
.bus = &spi_bus_type,
.owner = THIS_MODULE,
},
.probe = wm8728_spi_probe,
.remove = __devexit_p(wm8728_spi_remove),
};
static int wm8728_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;
}
#endif /* CONFIG_SPI_MASTER */
static int wm8728_probe(struct platform_device *pdev)
{
struct snd_soc_device *socdev = platform_get_drvdata(pdev);
struct wm8728_setup_data *setup;
struct snd_soc_codec *codec;
int ret = 0;
setup = socdev->codec_data;
codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL);
if (codec == NULL)
return -ENOMEM;
socdev->card->codec = codec;
mutex_init(&codec->mutex);
INIT_LIST_HEAD(&codec->dapm_widgets);
INIT_LIST_HEAD(&codec->dapm_paths);
wm8728_socdev = socdev;
ret = -ENODEV;
#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
if (setup->i2c_address) {
codec->hw_write = (hw_write_t)i2c_master_send;
ret = wm8728_add_i2c_device(pdev, setup);
}
#endif
#if defined(CONFIG_SPI_MASTER)
if (setup->spi) {
codec->hw_write = (hw_write_t)wm8728_spi_write;
ret = spi_register_driver(&wm8728_spi_driver);
if (ret != 0)
printk(KERN_ERR "can't add spi driver");
}
#endif
if (ret != 0)
kfree(codec);
return ret;
}
/* power down chip */
static int wm8728_remove(struct platform_device *pdev)
{
struct snd_soc_device *socdev = platform_get_drvdata(pdev);
struct snd_soc_codec *codec = socdev->card->codec;
if (codec->control_data)
wm8728_set_bias_level(codec, SND_SOC_BIAS_OFF);
snd_soc_free_pcms(socdev);
snd_soc_dapm_free(socdev);
#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
i2c_unregister_device(codec->control_data);
i2c_del_driver(&wm8728_i2c_driver);
#endif
#if defined(CONFIG_SPI_MASTER)
spi_unregister_driver(&wm8728_spi_driver);
#endif
kfree(codec);
return 0;
}
struct snd_soc_codec_device soc_codec_dev_wm8728 = {
.probe = wm8728_probe,
.remove = wm8728_remove,
.suspend = wm8728_suspend,
.resume = wm8728_resume,
};
EXPORT_SYMBOL_GPL(soc_codec_dev_wm8728);
static int __init wm8728_modinit(void)
{
return snd_soc_register_dai(&wm8728_dai);
}
module_init(wm8728_modinit);
static void __exit wm8728_exit(void)
{
snd_soc_unregister_dai(&wm8728_dai);
}
module_exit(wm8728_exit);
MODULE_DESCRIPTION("ASoC WM8728 driver");
MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
MODULE_LICENSE("GPL");
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