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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* sound/soc/codecs/wm8782.c
* simple, strap-pin configured 24bit 2ch ADC
*
* Copyright: 2011 Raumfeld GmbH
* Author: Johannes Stezenbach <js@sig21.net>
*
* based on ad73311.c
* Copyright: Analog Devices Inc.
* Author: Cliff Cai <cliff.cai@analog.com>
*/
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/device.h>
#include <linux/regulator/consumer.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/ac97_codec.h>
#include <sound/initval.h>
#include <sound/soc.h>
/* regulator power supply names */
static const char *supply_names[] = {
"Vdda", /* analog supply, 2.7V - 3.6V */
"Vdd", /* digital supply, 2.7V - 5.5V */
};
struct wm8782_priv {
struct regulator_bulk_data supplies[ARRAY_SIZE(supply_names)];
int max_rate;
};
static int wm8782_dai_startup(struct snd_pcm_substream *sub, struct snd_soc_dai *dai)
{
struct snd_pcm_runtime *runtime = sub->runtime;
struct wm8782_priv *priv =
snd_soc_component_get_drvdata(dai->component);
return snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_RATE,
8000, priv->max_rate);
}
static const struct snd_soc_dapm_widget wm8782_dapm_widgets[] = {
SND_SOC_DAPM_INPUT("AINL"),
SND_SOC_DAPM_INPUT("AINR"),
};
static const struct snd_soc_dapm_route wm8782_dapm_routes[] = {
{ "Capture", NULL, "AINL" },
{ "Capture", NULL, "AINR" },
};
static const struct snd_soc_dai_ops wm8782_dai_ops = {
.startup = &wm8782_dai_startup,
};
static struct snd_soc_dai_driver wm8782_dai = {
.name = "wm8782",
.capture = {
.stream_name = "Capture",
.channels_min = 2,
.channels_max = 2,
.rates = SNDRV_PCM_RATE_8000_192000,
.formats = SNDRV_PCM_FMTBIT_S16_LE |
SNDRV_PCM_FMTBIT_S20_3LE |
SNDRV_PCM_FMTBIT_S24_LE,
},
.ops = &wm8782_dai_ops,
};
static int wm8782_soc_probe(struct snd_soc_component *component)
{
struct wm8782_priv *priv = snd_soc_component_get_drvdata(component);
return regulator_bulk_enable(ARRAY_SIZE(priv->supplies), priv->supplies);
}
static void wm8782_soc_remove(struct snd_soc_component *component)
{
struct wm8782_priv *priv = snd_soc_component_get_drvdata(component);
regulator_bulk_disable(ARRAY_SIZE(priv->supplies), priv->supplies);
}
#ifdef CONFIG_PM
static int wm8782_soc_suspend(struct snd_soc_component *component)
{
struct wm8782_priv *priv = snd_soc_component_get_drvdata(component);
regulator_bulk_disable(ARRAY_SIZE(priv->supplies), priv->supplies);
return 0;
}
static int wm8782_soc_resume(struct snd_soc_component *component)
{
struct wm8782_priv *priv = snd_soc_component_get_drvdata(component);
return regulator_bulk_enable(ARRAY_SIZE(priv->supplies), priv->supplies);
}
#else
#define wm8782_soc_suspend NULL
#define wm8782_soc_resume NULL
#endif /* CONFIG_PM */
static const struct snd_soc_component_driver soc_component_dev_wm8782 = {
.probe = wm8782_soc_probe,
.remove = wm8782_soc_remove,
.suspend = wm8782_soc_suspend,
.resume = wm8782_soc_resume,
.dapm_widgets = wm8782_dapm_widgets,
.num_dapm_widgets = ARRAY_SIZE(wm8782_dapm_widgets),
.dapm_routes = wm8782_dapm_routes,
.num_dapm_routes = ARRAY_SIZE(wm8782_dapm_routes),
.idle_bias_on = 1,
.use_pmdown_time = 1,
.endianness = 1,
};
static int wm8782_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct device_node *np = dev->of_node;
struct wm8782_priv *priv;
int ret, i, fsampen;
priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
if (!priv)
return -ENOMEM;
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;
// Assume lowest value by default to avoid inadvertent overclocking
fsampen = 0;
if (np)
of_property_read_u32(np, "wlf,fsampen", &fsampen);
switch (fsampen) {
case 0:
priv->max_rate = 48000;
break;
case 1:
priv->max_rate = 96000;
break;
case 2:
priv->max_rate = 192000;
break;
default:
dev_err(dev, "Invalid wlf,fsampen value");
return -EINVAL;
}
return devm_snd_soc_register_component(&pdev->dev,
&soc_component_dev_wm8782, &wm8782_dai, 1);
}
#ifdef CONFIG_OF
static const struct of_device_id wm8782_of_match[] = {
{ .compatible = "wlf,wm8782", },
{ }
};
MODULE_DEVICE_TABLE(of, wm8782_of_match);
#endif
static struct platform_driver wm8782_codec_driver = {
.driver = {
.name = "wm8782",
.of_match_table = of_match_ptr(wm8782_of_match),
},
.probe = wm8782_probe,
};
module_platform_driver(wm8782_codec_driver);
MODULE_DESCRIPTION("ASoC WM8782 driver");
MODULE_AUTHOR("Johannes Stezenbach <js@sig21.net>");
MODULE_LICENSE("GPL");
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