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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* PCM1754 DAC ASoC codec driver
*
* Copyright (c) 2022 Alvin Šipraga <alsi@bang-olufsen.dk>
* Copyright (c) 2025 Stefan Kerkmann <s.kerkmann@pengutronix.de>
*/
#include <linux/gpio/consumer.h>
#include <linux/module.h>
#include <linux/regulator/consumer.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>
struct pcm1754_priv {
unsigned int format;
struct gpio_desc *gpiod_mute;
struct gpio_desc *gpiod_format;
};
static int pcm1754_set_dai_fmt(struct snd_soc_dai *codec_dai,
unsigned int format)
{
struct snd_soc_component *component = codec_dai->component;
struct pcm1754_priv *priv = snd_soc_component_get_drvdata(component);
priv->format = format;
return 0;
}
static int pcm1754_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params,
struct snd_soc_dai *codec_dai)
{
struct snd_soc_component *component = codec_dai->component;
struct pcm1754_priv *priv = snd_soc_component_get_drvdata(component);
int format;
switch (priv->format & SND_SOC_DAIFMT_FORMAT_MASK) {
case SND_SOC_DAIFMT_RIGHT_J:
switch (params_width(params)) {
case 16:
format = 1;
break;
default:
return -EINVAL;
}
break;
case SND_SOC_DAIFMT_I2S:
switch (params_width(params)) {
case 16:
fallthrough;
case 24:
format = 0;
break;
default:
return -EINVAL;
}
break;
default:
dev_err(component->dev, "Invalid DAI format\n");
return -EINVAL;
}
gpiod_set_value_cansleep(priv->gpiod_format, format);
return 0;
}
static int pcm1754_mute_stream(struct snd_soc_dai *dai, int mute, int stream)
{
struct pcm1754_priv *priv = snd_soc_component_get_drvdata(dai->component);
gpiod_set_value_cansleep(priv->gpiod_mute, mute);
return 0;
}
static const struct snd_soc_dai_ops pcm1754_dai_ops = {
.set_fmt = pcm1754_set_dai_fmt,
.hw_params = pcm1754_hw_params,
.mute_stream = pcm1754_mute_stream,
};
static const struct snd_soc_dai_driver pcm1754_dai = {
.name = "pcm1754",
.playback = {
.stream_name = "Playback",
.channels_min = 2,
.channels_max = 2,
.rates = SNDRV_PCM_RATE_CONTINUOUS,
.rate_min = 5000,
.rate_max = 200000,
.formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_LE
},
.ops = &pcm1754_dai_ops,
};
static const struct snd_soc_dapm_widget pcm1754_dapm_widgets[] = {
SND_SOC_DAPM_REGULATOR_SUPPLY("VCC", 0, 0),
SND_SOC_DAPM_DAC("DAC1", "Channel 1 Playback", SND_SOC_NOPM, 0, 0),
SND_SOC_DAPM_DAC("DAC2", "Channel 2 Playback", SND_SOC_NOPM, 0, 0),
SND_SOC_DAPM_OUTPUT("VOUTL"),
SND_SOC_DAPM_OUTPUT("VOUTR"),
};
static const struct snd_soc_dapm_route pcm1754_dapm_routes[] = {
{ "DAC1", NULL, "Playback" },
{ "DAC2", NULL, "Playback" },
{ "DAC1", NULL, "VCC" },
{ "DAC2", NULL, "VCC" },
{ "VOUTL", NULL, "DAC1" },
{ "VOUTR", NULL, "DAC2" },
};
static const struct snd_soc_component_driver soc_component_dev_pcm1754 = {
.dapm_widgets = pcm1754_dapm_widgets,
.num_dapm_widgets = ARRAY_SIZE(pcm1754_dapm_widgets),
.dapm_routes = pcm1754_dapm_routes,
.num_dapm_routes = ARRAY_SIZE(pcm1754_dapm_routes),
};
static int pcm1754_probe(struct platform_device *pdev)
{
struct pcm1754_priv *priv;
struct device *dev = &pdev->dev;
struct snd_soc_dai_driver *dai_drv;
int ret;
dai_drv = devm_kmemdup(dev, &pcm1754_dai, sizeof(*dai_drv), GFP_KERNEL);
if (!dai_drv)
return -ENOMEM;
priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
if (!priv)
return -ENOMEM;
priv->gpiod_mute = devm_gpiod_get_optional(dev, "mute", GPIOD_OUT_HIGH);
if (IS_ERR(priv->gpiod_mute))
return dev_err_probe(dev, PTR_ERR(priv->gpiod_mute),
"failed to get mute gpio");
priv->gpiod_format = devm_gpiod_get_optional(dev, "format", GPIOD_OUT_LOW);
if (IS_ERR(priv->gpiod_format))
return dev_err_probe(dev, PTR_ERR(priv->gpiod_format),
"failed to get format gpio");
dev_set_drvdata(dev, priv);
ret = devm_snd_soc_register_component(
&pdev->dev, &soc_component_dev_pcm1754, dai_drv, 1);
if (ret)
return dev_err_probe(dev, ret, "failed to register");
return 0;
}
#ifdef CONFIG_OF
static const struct of_device_id pcm1754_of_match[] = {
{ .compatible = "ti,pcm1754" },
{ }
};
MODULE_DEVICE_TABLE(of, pcm1754_of_match);
#endif
static struct platform_driver pcm1754_codec_driver = {
.driver = {
.name = "pcm1754-codec",
.of_match_table = of_match_ptr(pcm1754_of_match),
},
.probe = pcm1754_probe,
};
module_platform_driver(pcm1754_codec_driver);
MODULE_DESCRIPTION("ASoC PCM1754 driver");
MODULE_AUTHOR("Alvin Šipraga <alsi@bang-olufsen.dk>");
MODULE_AUTHOR("Stefan Kerkmann <s.kerkmann@pengutronix.de>");
MODULE_LICENSE("GPL");
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