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// SPDX-License-Identifier: GPL-2.0-only
//
// rt1015p.c -- RT1015P ALSA SoC audio amplifier driver
//
// Copyright 2020 The Linux Foundation. All rights reserved.
#include <linux/delay.h>
#include <linux/device.h>
#include <linux/err.h>
#include <linux/gpio.h>
#include <linux/gpio/consumer.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/platform_device.h>
#include <sound/pcm.h>
#include <sound/soc.h>
#include <sound/soc-dai.h>
#include <sound/soc-dapm.h>
struct rt1015p_priv {
struct gpio_desc *sdb;
bool calib_done;
};
static int rt1015p_sdb_event(struct snd_soc_dapm_widget *w,
struct snd_kcontrol *kcontrol, int event)
{
struct snd_soc_component *component =
snd_soc_dapm_to_component(w->dapm);
struct rt1015p_priv *rt1015p =
snd_soc_component_get_drvdata(component);
if (!rt1015p->sdb)
return 0;
switch (event) {
case SND_SOC_DAPM_PRE_PMU:
gpiod_set_value_cansleep(rt1015p->sdb, 1);
dev_dbg(component->dev, "set sdb to 1");
if (!rt1015p->calib_done) {
msleep(300);
rt1015p->calib_done = true;
}
break;
case SND_SOC_DAPM_POST_PMD:
gpiod_set_value_cansleep(rt1015p->sdb, 0);
dev_dbg(component->dev, "set sdb to 0");
break;
default:
break;
}
return 0;
}
static const struct snd_soc_dapm_widget rt1015p_dapm_widgets[] = {
SND_SOC_DAPM_OUTPUT("Speaker"),
SND_SOC_DAPM_OUT_DRV_E("SDB", SND_SOC_NOPM, 0, 0, NULL, 0,
rt1015p_sdb_event,
SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMD),
};
static const struct snd_soc_dapm_route rt1015p_dapm_routes[] = {
{"SDB", NULL, "HiFi Playback"},
{"Speaker", NULL, "SDB"},
};
#ifdef CONFIG_PM
static int rt1015p_suspend(struct snd_soc_component *component)
{
struct rt1015p_priv *rt1015p = snd_soc_component_get_drvdata(component);
rt1015p->calib_done = false;
return 0;
}
#else
#define rt1015p_suspend NULL
#endif
static const struct snd_soc_component_driver rt1015p_component_driver = {
.suspend = rt1015p_suspend,
.dapm_widgets = rt1015p_dapm_widgets,
.num_dapm_widgets = ARRAY_SIZE(rt1015p_dapm_widgets),
.dapm_routes = rt1015p_dapm_routes,
.num_dapm_routes = ARRAY_SIZE(rt1015p_dapm_routes),
.idle_bias_on = 1,
.use_pmdown_time = 1,
.endianness = 1,
.non_legacy_dai_naming = 1,
};
static struct snd_soc_dai_driver rt1015p_dai_driver = {
.name = "HiFi",
.playback = {
.stream_name = "HiFi Playback",
.formats = SNDRV_PCM_FMTBIT_S24,
.rates = SNDRV_PCM_RATE_48000,
.channels_min = 1,
.channels_max = 2,
},
};
static int rt1015p_platform_probe(struct platform_device *pdev)
{
struct rt1015p_priv *rt1015p;
rt1015p = devm_kzalloc(&pdev->dev, sizeof(*rt1015p), GFP_KERNEL);
if (!rt1015p)
return -ENOMEM;
rt1015p->sdb = devm_gpiod_get_optional(&pdev->dev,
"sdb", GPIOD_OUT_LOW);
if (IS_ERR(rt1015p->sdb))
return PTR_ERR(rt1015p->sdb);
dev_set_drvdata(&pdev->dev, rt1015p);
return devm_snd_soc_register_component(&pdev->dev,
&rt1015p_component_driver,
&rt1015p_dai_driver, 1);
}
#ifdef CONFIG_OF
static const struct of_device_id rt1015p_device_id[] = {
{ .compatible = "realtek,rt1015p" },
{}
};
MODULE_DEVICE_TABLE(of, rt1015p_device_id);
#endif
static struct platform_driver rt1015p_platform_driver = {
.driver = {
.name = "rt1015p",
.of_match_table = of_match_ptr(rt1015p_device_id),
},
.probe = rt1015p_platform_probe,
};
module_platform_driver(rt1015p_platform_driver);
MODULE_DESCRIPTION("ASoC RT1015P driver");
MODULE_LICENSE("GPL v2");
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