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// SPDX-License-Identifier: GPL-2.0
//
// ROHM BD28623MUV class D speaker amplifier codec driver.
//
// Copyright (c) 2018 Socionext Inc.
#include <linux/delay.h>
#include <linux/gpio/consumer.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/regulator/consumer.h>
#include <sound/pcm.h>
#include <sound/soc.h>
#define BD28623_NUM_SUPPLIES 3
static const char *const bd28623_supply_names[BD28623_NUM_SUPPLIES] = {
"VCCA",
"VCCP1",
"VCCP2",
};
struct bd28623_priv {
struct device *dev;
struct regulator_bulk_data supplies[BD28623_NUM_SUPPLIES];
struct gpio_desc *reset_gpio;
struct gpio_desc *mute_gpio;
int switch_spk;
};
static const struct snd_soc_dapm_widget bd28623_widgets[] = {
SND_SOC_DAPM_DAC("DAC", "Playback", SND_SOC_NOPM, 0, 0),
SND_SOC_DAPM_OUTPUT("OUT1P"),
SND_SOC_DAPM_OUTPUT("OUT1N"),
SND_SOC_DAPM_OUTPUT("OUT2P"),
SND_SOC_DAPM_OUTPUT("OUT2N"),
};
static const struct snd_soc_dapm_route bd28623_routes[] = {
{ "OUT1P", NULL, "DAC" },
{ "OUT1N", NULL, "DAC" },
{ "OUT2P", NULL, "DAC" },
{ "OUT2N", NULL, "DAC" },
};
static int bd28623_power_on(struct bd28623_priv *bd)
{
int ret;
ret = regulator_bulk_enable(ARRAY_SIZE(bd->supplies), bd->supplies);
if (ret) {
dev_err(bd->dev, "Failed to enable supplies: %d\n", ret);
return ret;
}
gpiod_set_value_cansleep(bd->reset_gpio, 0);
usleep_range(300000, 400000);
return 0;
}
static void bd28623_power_off(struct bd28623_priv *bd)
{
gpiod_set_value_cansleep(bd->reset_gpio, 1);
regulator_bulk_disable(ARRAY_SIZE(bd->supplies), bd->supplies);
}
static int bd28623_get_switch_spk(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct snd_soc_component *component =
snd_soc_kcontrol_component(kcontrol);
struct bd28623_priv *bd = snd_soc_component_get_drvdata(component);
ucontrol->value.integer.value[0] = bd->switch_spk;
return 0;
}
static int bd28623_set_switch_spk(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct snd_soc_component *component =
snd_soc_kcontrol_component(kcontrol);
struct bd28623_priv *bd = snd_soc_component_get_drvdata(component);
if (bd->switch_spk == ucontrol->value.integer.value[0])
return 0;
bd->switch_spk = ucontrol->value.integer.value[0];
gpiod_set_value_cansleep(bd->mute_gpio, bd->switch_spk ? 0 : 1);
return 0;
}
static const struct snd_kcontrol_new bd28623_controls[] = {
SOC_SINGLE_BOOL_EXT("Speaker Switch", 0,
bd28623_get_switch_spk, bd28623_set_switch_spk),
};
static int bd28623_codec_probe(struct snd_soc_component *component)
{
struct bd28623_priv *bd = snd_soc_component_get_drvdata(component);
int ret;
bd->switch_spk = 1;
ret = bd28623_power_on(bd);
if (ret)
return ret;
gpiod_set_value_cansleep(bd->mute_gpio, bd->switch_spk ? 0 : 1);
return 0;
}
static void bd28623_codec_remove(struct snd_soc_component *component)
{
struct bd28623_priv *bd = snd_soc_component_get_drvdata(component);
bd28623_power_off(bd);
}
static int bd28623_codec_suspend(struct snd_soc_component *component)
{
struct bd28623_priv *bd = snd_soc_component_get_drvdata(component);
bd28623_power_off(bd);
return 0;
}
static int bd28623_codec_resume(struct snd_soc_component *component)
{
struct bd28623_priv *bd = snd_soc_component_get_drvdata(component);
int ret;
ret = bd28623_power_on(bd);
if (ret)
return ret;
gpiod_set_value_cansleep(bd->mute_gpio, bd->switch_spk ? 0 : 1);
return 0;
}
static const struct snd_soc_component_driver soc_codec_bd = {
.probe = bd28623_codec_probe,
.remove = bd28623_codec_remove,
.suspend = bd28623_codec_suspend,
.resume = bd28623_codec_resume,
.dapm_widgets = bd28623_widgets,
.num_dapm_widgets = ARRAY_SIZE(bd28623_widgets),
.dapm_routes = bd28623_routes,
.num_dapm_routes = ARRAY_SIZE(bd28623_routes),
.controls = bd28623_controls,
.num_controls = ARRAY_SIZE(bd28623_controls),
.idle_bias_on = 1,
.use_pmdown_time = 1,
.endianness = 1,
};
static struct snd_soc_dai_driver soc_dai_bd = {
.name = "bd28623-speaker",
.playback = {
.stream_name = "Playback",
.formats = SNDRV_PCM_FMTBIT_S32_LE |
SNDRV_PCM_FMTBIT_S24_LE |
SNDRV_PCM_FMTBIT_S16_LE,
.rates = SNDRV_PCM_RATE_48000 |
SNDRV_PCM_RATE_44100 |
SNDRV_PCM_RATE_32000,
.channels_min = 2,
.channels_max = 2,
},
};
static int bd28623_probe(struct platform_device *pdev)
{
struct bd28623_priv *bd;
struct device *dev = &pdev->dev;
int i, ret;
bd = devm_kzalloc(&pdev->dev, sizeof(struct bd28623_priv), GFP_KERNEL);
if (!bd)
return -ENOMEM;
for (i = 0; i < ARRAY_SIZE(bd->supplies); i++)
bd->supplies[i].supply = bd28623_supply_names[i];
ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(bd->supplies),
bd->supplies);
if (ret) {
dev_err(dev, "Failed to get supplies: %d\n", ret);
return ret;
}
bd->reset_gpio = devm_gpiod_get_optional(dev, "reset",
GPIOD_OUT_HIGH);
if (IS_ERR(bd->reset_gpio)) {
dev_err(dev, "Failed to request reset_gpio: %ld\n",
PTR_ERR(bd->reset_gpio));
return PTR_ERR(bd->reset_gpio);
}
bd->mute_gpio = devm_gpiod_get_optional(dev, "mute",
GPIOD_OUT_HIGH);
if (IS_ERR(bd->mute_gpio)) {
dev_err(dev, "Failed to request mute_gpio: %ld\n",
PTR_ERR(bd->mute_gpio));
return PTR_ERR(bd->mute_gpio);
}
platform_set_drvdata(pdev, bd);
bd->dev = dev;
return devm_snd_soc_register_component(dev, &soc_codec_bd,
&soc_dai_bd, 1);
}
static const struct of_device_id bd28623_of_match[] __maybe_unused = {
{ .compatible = "rohm,bd28623", },
{}
};
MODULE_DEVICE_TABLE(of, bd28623_of_match);
static struct platform_driver bd28623_codec_driver = {
.driver = {
.name = "bd28623",
.of_match_table = of_match_ptr(bd28623_of_match),
},
.probe = bd28623_probe,
};
module_platform_driver(bd28623_codec_driver);
MODULE_AUTHOR("Katsuhiro Suzuki <suzuki.katsuhiro@socionext.com>");
MODULE_DESCRIPTION("ROHM BD28623 speaker amplifier driver");
MODULE_LICENSE("GPL v2");
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