219 строки
5.6 KiB
C
219 строки
5.6 KiB
C
/*
|
|
* ALSA SoC driver for
|
|
* Asahi Kasei AK5386 Single-ended 24-Bit 192kHz delta-sigma ADC
|
|
*
|
|
* (c) 2013 Daniel Mack <zonque@gmail.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/slab.h>
|
|
#include <linux/of.h>
|
|
#include <linux/of_gpio.h>
|
|
#include <linux/of_device.h>
|
|
#include <linux/regulator/consumer.h>
|
|
#include <sound/soc.h>
|
|
#include <sound/pcm.h>
|
|
#include <sound/initval.h>
|
|
|
|
static const char * const supply_names[] = {
|
|
"va", "vd"
|
|
};
|
|
|
|
struct ak5386_priv {
|
|
int reset_gpio;
|
|
struct regulator_bulk_data supplies[ARRAY_SIZE(supply_names)];
|
|
};
|
|
|
|
static const struct snd_soc_dapm_widget ak5386_dapm_widgets[] = {
|
|
SND_SOC_DAPM_INPUT("AINL"),
|
|
SND_SOC_DAPM_INPUT("AINR"),
|
|
};
|
|
|
|
static const struct snd_soc_dapm_route ak5386_dapm_routes[] = {
|
|
{ "Capture", NULL, "AINL" },
|
|
{ "Capture", NULL, "AINR" },
|
|
};
|
|
|
|
static int ak5386_soc_probe(struct snd_soc_codec *codec)
|
|
{
|
|
struct ak5386_priv *priv = snd_soc_codec_get_drvdata(codec);
|
|
return regulator_bulk_enable(ARRAY_SIZE(priv->supplies), priv->supplies);
|
|
}
|
|
|
|
static int ak5386_soc_remove(struct snd_soc_codec *codec)
|
|
{
|
|
struct ak5386_priv *priv = snd_soc_codec_get_drvdata(codec);
|
|
regulator_bulk_disable(ARRAY_SIZE(priv->supplies), priv->supplies);
|
|
return 0;
|
|
}
|
|
|
|
#ifdef CONFIG_PM
|
|
static int ak5386_soc_suspend(struct snd_soc_codec *codec)
|
|
{
|
|
struct ak5386_priv *priv = snd_soc_codec_get_drvdata(codec);
|
|
regulator_bulk_disable(ARRAY_SIZE(priv->supplies), priv->supplies);
|
|
return 0;
|
|
}
|
|
|
|
static int ak5386_soc_resume(struct snd_soc_codec *codec)
|
|
{
|
|
struct ak5386_priv *priv = snd_soc_codec_get_drvdata(codec);
|
|
return regulator_bulk_enable(ARRAY_SIZE(priv->supplies), priv->supplies);
|
|
}
|
|
#else
|
|
#define ak5386_soc_suspend NULL
|
|
#define ak5386_soc_resume NULL
|
|
#endif /* CONFIG_PM */
|
|
|
|
static const struct snd_soc_codec_driver soc_codec_ak5386 = {
|
|
.probe = ak5386_soc_probe,
|
|
.remove = ak5386_soc_remove,
|
|
.suspend = ak5386_soc_suspend,
|
|
.resume = ak5386_soc_resume,
|
|
.component_driver = {
|
|
.dapm_widgets = ak5386_dapm_widgets,
|
|
.num_dapm_widgets = ARRAY_SIZE(ak5386_dapm_widgets),
|
|
.dapm_routes = ak5386_dapm_routes,
|
|
.num_dapm_routes = ARRAY_SIZE(ak5386_dapm_routes),
|
|
},
|
|
};
|
|
|
|
static int ak5386_set_dai_fmt(struct snd_soc_dai *codec_dai,
|
|
unsigned int format)
|
|
{
|
|
struct snd_soc_codec *codec = codec_dai->codec;
|
|
|
|
format &= SND_SOC_DAIFMT_FORMAT_MASK;
|
|
if (format != SND_SOC_DAIFMT_LEFT_J &&
|
|
format != SND_SOC_DAIFMT_I2S) {
|
|
dev_err(codec->dev, "Invalid DAI format\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int ak5386_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 ak5386_priv *priv = snd_soc_codec_get_drvdata(codec);
|
|
|
|
/*
|
|
* From the datasheet:
|
|
*
|
|
* All external clocks (MCLK, SCLK and LRCK) must be present unless
|
|
* PDN pin = “L”. If these clocks are not provided, the AK5386 may
|
|
* draw excess current due to its use of internal dynamically
|
|
* refreshed logic. If the external clocks are not present, place
|
|
* the AK5386 in power-down mode (PDN pin = “L”).
|
|
*/
|
|
|
|
if (gpio_is_valid(priv->reset_gpio))
|
|
gpio_set_value(priv->reset_gpio, 1);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int ak5386_hw_free(struct snd_pcm_substream *substream,
|
|
struct snd_soc_dai *dai)
|
|
{
|
|
struct snd_soc_codec *codec = dai->codec;
|
|
struct ak5386_priv *priv = snd_soc_codec_get_drvdata(codec);
|
|
|
|
if (gpio_is_valid(priv->reset_gpio))
|
|
gpio_set_value(priv->reset_gpio, 0);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct snd_soc_dai_ops ak5386_dai_ops = {
|
|
.set_fmt = ak5386_set_dai_fmt,
|
|
.hw_params = ak5386_hw_params,
|
|
.hw_free = ak5386_hw_free,
|
|
};
|
|
|
|
static struct snd_soc_dai_driver ak5386_dai = {
|
|
.name = "ak5386-hifi",
|
|
.capture = {
|
|
.stream_name = "Capture",
|
|
.channels_min = 1,
|
|
.channels_max = 2,
|
|
.rates = SNDRV_PCM_RATE_8000_192000,
|
|
.formats = SNDRV_PCM_FMTBIT_S8 |
|
|
SNDRV_PCM_FMTBIT_S16_LE |
|
|
SNDRV_PCM_FMTBIT_S24_LE |
|
|
SNDRV_PCM_FMTBIT_S24_3LE,
|
|
},
|
|
.ops = &ak5386_dai_ops,
|
|
};
|
|
|
|
#ifdef CONFIG_OF
|
|
static const struct of_device_id ak5386_dt_ids[] = {
|
|
{ .compatible = "asahi-kasei,ak5386", },
|
|
{ }
|
|
};
|
|
MODULE_DEVICE_TABLE(of, ak5386_dt_ids);
|
|
#endif
|
|
|
|
static int ak5386_probe(struct platform_device *pdev)
|
|
{
|
|
struct device *dev = &pdev->dev;
|
|
struct ak5386_priv *priv;
|
|
int ret, i;
|
|
|
|
priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
|
|
if (!priv)
|
|
return -ENOMEM;
|
|
|
|
priv->reset_gpio = -EINVAL;
|
|
dev_set_drvdata(dev, priv);
|
|
|
|
for (i = 0; i < ARRAY_SIZE(supply_names); i++)
|
|
priv->supplies[i].supply = supply_names[i];
|
|
|
|
ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(priv->supplies),
|
|
priv->supplies);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
if (of_match_device(of_match_ptr(ak5386_dt_ids), dev))
|
|
priv->reset_gpio = of_get_named_gpio(dev->of_node,
|
|
"reset-gpio", 0);
|
|
|
|
if (gpio_is_valid(priv->reset_gpio))
|
|
if (devm_gpio_request_one(dev, priv->reset_gpio,
|
|
GPIOF_OUT_INIT_LOW,
|
|
"AK5386 Reset"))
|
|
priv->reset_gpio = -EINVAL;
|
|
|
|
return snd_soc_register_codec(dev, &soc_codec_ak5386,
|
|
&ak5386_dai, 1);
|
|
}
|
|
|
|
static int ak5386_remove(struct platform_device *pdev)
|
|
{
|
|
snd_soc_unregister_codec(&pdev->dev);
|
|
return 0;
|
|
}
|
|
|
|
static struct platform_driver ak5386_driver = {
|
|
.probe = ak5386_probe,
|
|
.remove = ak5386_remove,
|
|
.driver = {
|
|
.name = "ak5386",
|
|
.of_match_table = of_match_ptr(ak5386_dt_ids),
|
|
},
|
|
};
|
|
|
|
module_platform_driver(ak5386_driver);
|
|
|
|
MODULE_DESCRIPTION("ASoC driver for AK5386 ADC");
|
|
MODULE_AUTHOR("Daniel Mack <zonque@gmail.com>");
|
|
MODULE_LICENSE("GPL");
|