365 lines
8.7 KiB
C
365 lines
8.7 KiB
C
|
/*
|
||
|
|
* AK4104 ALSA SoC (ASoC) driver
|
||
|
|
*
|
||
|
|
* Copyright (c) 2009 Daniel Mack <daniel@caiaq.de>
|
||
|
|
*
|
||
|
|
* 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/module.h>
|
||
|
|
#include <linux/slab.h>
|
||
|
|
#include <linux/spi/spi.h>
|
||
|
|
#include <linux/of_device.h>
|
||
|
|
#include <linux/of_gpio.h>
|
||
|
|
#include <linux/regulator/consumer.h>
|
||
|
|
#include <sound/asoundef.h>
|
||
|
|
#include <sound/core.h>
|
||
|
|
#include <sound/soc.h>
|
||
|
|
#include <sound/initval.h>
|
||
|
|
|
||
|
|
/* AK4104 registers addresses */
|
||
|
|
#define AK4104_REG_CONTROL1 0x00
|
||
|
|
#define AK4104_REG_RESERVED 0x01
|
||
|
|
#define AK4104_REG_CONTROL2 0x02
|
||
|
|
#define AK4104_REG_TX 0x03
|
||
|
|
#define AK4104_REG_CHN_STATUS(x) ((x) + 0x04)
|
||
|
|
#define AK4104_NUM_REGS 10
|
||
|
|
|
||
|
|
#define AK4104_REG_MASK 0x1f
|
||
|
|
#define AK4104_READ 0xc0
|
||
|
|
#define AK4104_WRITE 0xe0
|
||
|
|
#define AK4104_RESERVED_VAL 0x5b
|
||
|
|
|
||
|
|
/* Bit masks for AK4104 registers */
|
||
|
|
#define AK4104_CONTROL1_RSTN (1 << 0)
|
||
|
|
#define AK4104_CONTROL1_PW (1 << 1)
|
||
|
|
#define AK4104_CONTROL1_DIF0 (1 << 2)
|
||
|
|
#define AK4104_CONTROL1_DIF1 (1 << 3)
|
||
|
|
|
||
|
|
#define AK4104_CONTROL2_SEL0 (1 << 0)
|
||
|
|
#define AK4104_CONTROL2_SEL1 (1 << 1)
|
||
|
|
#define AK4104_CONTROL2_MODE (1 << 2)
|
||
|
|
|
||
|
|
#define AK4104_TX_TXE (1 << 0)
|
||
|
|
#define AK4104_TX_V (1 << 1)
|
||
|
|
|
||
|
|
struct ak4104_private {
|
||
|
|
struct regmap *regmap;
|
||
|
|
struct regulator *regulator;
|
||
|
|
};
|
||
|
|
|
||
|
|
static const struct snd_soc_dapm_widget ak4104_dapm_widgets[] = {
|
||
|
|
SND_SOC_DAPM_PGA("TXE", AK4104_REG_TX, AK4104_TX_TXE, 0, NULL, 0),
|
||
|
|
|
||
|
|
SND_SOC_DAPM_OUTPUT("TX"),
|
||
|
|
};
|
||
|
|
|
||
|
|
static const struct snd_soc_dapm_route ak4104_dapm_routes[] = {
|
||
|
|
{ "TXE", NULL, "Playback" },
|
||
|
|
{ "TX", NULL, "TXE" },
|
||
|
|
};
|
||
|
|
|
||
|
|
static int ak4104_set_dai_fmt(struct snd_soc_dai *codec_dai,
|
||
|
|
unsigned int format)
|
||
|
|
{
|
||
|
|
struct snd_soc_codec *codec = codec_dai->codec;
|
||
|
|
struct ak4104_private *ak4104 = snd_soc_codec_get_drvdata(codec);
|
||
|
|
int val = 0;
|
||
|
|
int ret;
|
||
|
|
|
||
|
|
/* set DAI format */
|
||
|
|
switch (format & SND_SOC_DAIFMT_FORMAT_MASK) {
|
||
|
|
case SND_SOC_DAIFMT_RIGHT_J:
|
||
|
|
break;
|
||
|
|
case SND_SOC_DAIFMT_LEFT_J:
|
||
|
|
val |= AK4104_CONTROL1_DIF0;
|
||
|
|
break;
|
||
|
|
case SND_SOC_DAIFMT_I2S:
|
||
|
|
val |= AK4104_CONTROL1_DIF0 | AK4104_CONTROL1_DIF1;
|
||
|
|
break;
|
||
|
|
default:
|
||
|
|
dev_err(codec->dev, "invalid dai format\n");
|
||
|
|
return -EINVAL;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* This device can only be slave */
|
||
|
|
if ((format & SND_SOC_DAIFMT_MASTER_MASK) != SND_SOC_DAIFMT_CBS_CFS)
|
||
|
|
return -EINVAL;
|
||
|
|
|
||
|
|
ret = regmap_update_bits(ak4104->regmap, AK4104_REG_CONTROL1,
|
||
|
|
AK4104_CONTROL1_DIF0 | AK4104_CONTROL1_DIF1,
|
||
|
|
val);
|
||
|
|
if (ret < 0)
|
||
|
|
return ret;
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int ak4104_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 ak4104_private *ak4104 = snd_soc_codec_get_drvdata(codec);
|
||
|
|
int ret, val = 0;
|
||
|
|
|
||
|
|
/* set the IEC958 bits: consumer mode, no copyright bit */
|
||
|
|
val |= IEC958_AES0_CON_NOT_COPYRIGHT;
|
||
|
|
regmap_write(ak4104->regmap, AK4104_REG_CHN_STATUS(0), val);
|
||
|
|
|
||
|
|
val = 0;
|
||
|
|
|
||
|
|
switch (params_rate(params)) {
|
||
|
|
case 22050:
|
||
|
|
val |= IEC958_AES3_CON_FS_22050;
|
||
|
|
break;
|
||
|
|
case 24000:
|
||
|
|
val |= IEC958_AES3_CON_FS_24000;
|
||
|
|
break;
|
||
|
|
case 32000:
|
||
|
|
val |= IEC958_AES3_CON_FS_32000;
|
||
|
|
break;
|
||
|
|
case 44100:
|
||
|
|
val |= IEC958_AES3_CON_FS_44100;
|
||
|
|
break;
|
||
|
|
case 48000:
|
||
|
|
val |= IEC958_AES3_CON_FS_48000;
|
||
|
|
break;
|
||
|
|
case 88200:
|
||
|
|
val |= IEC958_AES3_CON_FS_88200;
|
||
|
|
break;
|
||
|
|
case 96000:
|
||
|
|
val |= IEC958_AES3_CON_FS_96000;
|
||
|
|
break;
|
||
|
|
case 176400:
|
||
|
|
val |= IEC958_AES3_CON_FS_176400;
|
||
|
|
break;
|
||
|
|
case 192000:
|
||
|
|
val |= IEC958_AES3_CON_FS_192000;
|
||
|
|
break;
|
||
|
|
default:
|
||
|
|
dev_err(codec->dev, "unsupported sampling rate\n");
|
||
|
|
return -EINVAL;
|
||
|
|
}
|
||
|
|
|
||
|
|
ret = regmap_write(ak4104->regmap, AK4104_REG_CHN_STATUS(3), val);
|
||
|
|
if (ret < 0)
|
||
|
|
return ret;
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static const struct snd_soc_dai_ops ak4101_dai_ops = {
|
||
|
|
.hw_params = ak4104_hw_params,
|
||
|
|
.set_fmt = ak4104_set_dai_fmt,
|
||
|
|
};
|
||
|
|
|
||
|
|
static struct snd_soc_dai_driver ak4104_dai = {
|
||
|
|
.name = "ak4104-hifi",
|
||
|
|
.playback = {
|
||
|
|
.stream_name = "Playback",
|
||
|
|
.channels_min = 2,
|
||
|
|
.channels_max = 2,
|
||
|
|
.rates = SNDRV_PCM_RATE_22050 | SNDRV_PCM_RATE_32000 |
|
||
|
|
SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000 |
|
||
|
|
SNDRV_PCM_RATE_88200 | SNDRV_PCM_RATE_96000 |
|
||
|
|
SNDRV_PCM_RATE_176400 | SNDRV_PCM_RATE_192000,
|
||
|
|
.formats = SNDRV_PCM_FMTBIT_S16_LE |
|
||
|
|
SNDRV_PCM_FMTBIT_S24_3LE |
|
||
|
|
SNDRV_PCM_FMTBIT_S24_LE
|
||
|
|
},
|
||
|
|
.ops = &ak4101_dai_ops,
|
||
|
|
};
|
||
|
|
|
||
|
|
static int ak4104_probe(struct snd_soc_codec *codec)
|
||
|
|
{
|
||
|
|
struct ak4104_private *ak4104 = snd_soc_codec_get_drvdata(codec);
|
||
|
|
int ret;
|
||
|
|
|
||
|
|
ret = regulator_enable(ak4104->regulator);
|
||
|
|
if (ret < 0) {
|
||
|
|
dev_err(codec->dev, "Unable to enable regulator: %d\n", ret);
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* set power-up and non-reset bits */
|
||
|
|
ret = regmap_update_bits(ak4104->regmap, AK4104_REG_CONTROL1,
|
||
|
|
AK4104_CONTROL1_PW | AK4104_CONTROL1_RSTN,
|
||
|
|
AK4104_CONTROL1_PW | AK4104_CONTROL1_RSTN);
|
||
|
|
if (ret < 0)
|
||
|
|
goto exit_disable_regulator;
|
||
|
|
|
||
|
|
/* enable transmitter */
|
||
|
|
ret = regmap_update_bits(ak4104->regmap, AK4104_REG_TX,
|
||
|
|
AK4104_TX_TXE, AK4104_TX_TXE);
|
||
|
|
if (ret < 0)
|
||
|
|
goto exit_disable_regulator;
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
|
||
|
|
exit_disable_regulator:
|
||
|
|
regulator_disable(ak4104->regulator);
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int ak4104_remove(struct snd_soc_codec *codec)
|
||
|
|
{
|
||
|
|
struct ak4104_private *ak4104 = snd_soc_codec_get_drvdata(codec);
|
||
|
|
|
||
|
|
regmap_update_bits(ak4104->regmap, AK4104_REG_CONTROL1,
|
||
|
|
AK4104_CONTROL1_PW | AK4104_CONTROL1_RSTN, 0);
|
||
|
|
regulator_disable(ak4104->regulator);
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
#ifdef CONFIG_PM
|
||
|
|
static int ak4104_soc_suspend(struct snd_soc_codec *codec)
|
||
|
|
{
|
||
|
|
struct ak4104_private *priv = snd_soc_codec_get_drvdata(codec);
|
||
|
|
|
||
|
|
regulator_disable(priv->regulator);
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int ak4104_soc_resume(struct snd_soc_codec *codec)
|
||
|
|
{
|
||
|
|
struct ak4104_private *priv = snd_soc_codec_get_drvdata(codec);
|
||
|
|
int ret;
|
||
|
|
|
||
|
|
ret = regulator_enable(priv->regulator);
|
||
|
|
if (ret < 0)
|
||
|
|
return ret;
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
#else
|
||
|
|
#define ak4104_soc_suspend NULL
|
||
|
|
#define ak4104_soc_resume NULL
|
||
|
|
#endif /* CONFIG_PM */
|
||
|
|
|
||
|
|
static struct snd_soc_codec_driver soc_codec_device_ak4104 = {
|
||
|
|
.probe = ak4104_probe,
|
||
|
|
.remove = ak4104_remove,
|
||
|
|
.suspend = ak4104_soc_suspend,
|
||
|
|
.resume = ak4104_soc_resume,
|
||
|
|
|
||
|
|
.component_driver = {
|
||
|
|
.dapm_widgets = ak4104_dapm_widgets,
|
||
|
|
.num_dapm_widgets = ARRAY_SIZE(ak4104_dapm_widgets),
|
||
|
|
.dapm_routes = ak4104_dapm_routes,
|
||
|
|
.num_dapm_routes = ARRAY_SIZE(ak4104_dapm_routes),
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
static const struct regmap_config ak4104_regmap = {
|
||
|
|
.reg_bits = 8,
|
||
|
|
.val_bits = 8,
|
||
|
|
|
||
|
|
.max_register = AK4104_NUM_REGS - 1,
|
||
|
|
.read_flag_mask = AK4104_READ,
|
||
|
|
.write_flag_mask = AK4104_WRITE,
|
||
|
|
|
||
|
|
.cache_type = REGCACHE_RBTREE,
|
||
|
|
};
|
||
|
|
|
||
|
|
static int ak4104_spi_probe(struct spi_device *spi)
|
||
|
|
{
|
||
|
|
struct device_node *np = spi->dev.of_node;
|
||
|
|
struct ak4104_private *ak4104;
|
||
|
|
unsigned int val;
|
||
|
|
int ret;
|
||
|
|
|
||
|
|
spi->bits_per_word = 8;
|
||
|
|
spi->mode = SPI_MODE_0;
|
||
|
|
ret = spi_setup(spi);
|
||
|
|
if (ret < 0)
|
||
|
|
return ret;
|
||
|
|
|
||
|
|
ak4104 = devm_kzalloc(&spi->dev, sizeof(struct ak4104_private),
|
||
|
|
GFP_KERNEL);
|
||
|
|
if (ak4104 == NULL)
|
||
|
|
return -ENOMEM;
|
||
|
|
|
||
|
|
ak4104->regulator = devm_regulator_get(&spi->dev, "vdd");
|
||
|
|
if (IS_ERR(ak4104->regulator)) {
|
||
|
|
ret = PTR_ERR(ak4104->regulator);
|
||
|
|
dev_err(&spi->dev, "Unable to get Vdd regulator: %d\n", ret);
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
ak4104->regmap = devm_regmap_init_spi(spi, &ak4104_regmap);
|
||
|
|
if (IS_ERR(ak4104->regmap)) {
|
||
|
|
ret = PTR_ERR(ak4104->regmap);
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (np) {
|
||
|
|
enum of_gpio_flags flags;
|
||
|
|
int gpio = of_get_named_gpio_flags(np, "reset-gpio", 0, &flags);
|
||
|
|
|
||
|
|
if (gpio_is_valid(gpio)) {
|
||
|
|
ret = devm_gpio_request_one(&spi->dev, gpio,
|
||
|
|
flags & OF_GPIO_ACTIVE_LOW ?
|
||
|
|
GPIOF_OUT_INIT_LOW : GPIOF_OUT_INIT_HIGH,
|
||
|
|
"ak4104 reset");
|
||
|
|
if (ret < 0)
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/* read the 'reserved' register - according to the datasheet, it
|
||
|
|
* should contain 0x5b. Not a good way to verify the presence of
|
||
|
|
* the device, but there is no hardware ID register. */
|
||
|
|
ret = regmap_read(ak4104->regmap, AK4104_REG_RESERVED, &val);
|
||
|
|
if (ret != 0)
|
||
|
|
return ret;
|
||
|
|
if (val != AK4104_RESERVED_VAL)
|
||
|
|
return -ENODEV;
|
||
|
|
|
||
|
|
spi_set_drvdata(spi, ak4104);
|
||
|
|
|
||
|
|
ret = snd_soc_register_codec(&spi->dev,
|
||
|
|
&soc_codec_device_ak4104, &ak4104_dai, 1);
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int ak4104_spi_remove(struct spi_device *spi)
|
||
|
|
{
|
||
|
|
snd_soc_unregister_codec(&spi->dev);
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static const struct of_device_id ak4104_of_match[] = {
|
||
|
|
{ .compatible = "asahi-kasei,ak4104", },
|
||
|
|
{ }
|
||
|
|
};
|
||
|
|
MODULE_DEVICE_TABLE(of, ak4104_of_match);
|
||
|
|
|
||
|
|
static const struct spi_device_id ak4104_id_table[] = {
|
||
|
|
{ "ak4104", 0 },
|
||
|
|
{ }
|
||
|
|
};
|
||
|
|
MODULE_DEVICE_TABLE(spi, ak4104_id_table);
|
||
|
|
|
||
|
|
static struct spi_driver ak4104_spi_driver = {
|
||
|
|
.driver = {
|
||
|
|
.name = "ak4104",
|
||
|
|
.of_match_table = ak4104_of_match,
|
||
|
|
},
|
||
|
|
.id_table = ak4104_id_table,
|
||
|
|
.probe = ak4104_spi_probe,
|
||
|
|
.remove = ak4104_spi_remove,
|
||
|
|
};
|
||
|
|
|
||
|
|
module_spi_driver(ak4104_spi_driver);
|
||
|
|
|
||
|
|
MODULE_AUTHOR("Daniel Mack <daniel@caiaq.de>");
|
||
|
|
MODULE_DESCRIPTION("Asahi Kasei AK4104 ALSA SoC driver");
|
||
|
|
MODULE_LICENSE("GPL");
|
||
|
|
|