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// SPDX-License-Identifier: GPL-2.0-only
//
// rt9123p.c -- RT9123 (HW Mode) ALSA SoC Codec driver
//
// Author: ChiYuan Huang <cy_huang@richtek.com>
#include <linux/acpi.h>
#include <linux/delay.h>
#include <linux/err.h>
#include <linux/gpio/consumer.h>
#include <linux/kernel.h>
#include <linux/mod_devicetable.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/property.h>
#include <sound/pcm.h>
#include <sound/soc.h>
#include <sound/soc-dai.h>
#include <sound/soc-dapm.h>
struct rt9123p_priv {
struct gpio_desc *enable;
unsigned int enable_delay;
int enable_switch;
};
static int rt9123p_daiops_trigger(struct snd_pcm_substream *substream, int cmd,
struct snd_soc_dai *dai)
{
struct snd_soc_component *comp = dai->component;
struct rt9123p_priv *rt9123p = snd_soc_component_get_drvdata(comp);
if (!rt9123p->enable)
return 0;
switch (cmd) {
case SNDRV_PCM_TRIGGER_START:
case SNDRV_PCM_TRIGGER_RESUME:
case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
mdelay(rt9123p->enable_delay);
if (rt9123p->enable_switch) {
gpiod_set_value(rt9123p->enable, 1);
dev_dbg(comp->dev, "set enable to 1");
}
break;
case SNDRV_PCM_TRIGGER_STOP:
case SNDRV_PCM_TRIGGER_SUSPEND:
case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
gpiod_set_value(rt9123p->enable, 0);
dev_dbg(comp->dev, "set enable to 0");
break;
default:
break;
}
return 0;
}
static int rt9123p_enable_event(struct snd_soc_dapm_widget *w, struct snd_kcontrol *kcontrol,
int event)
{
struct snd_soc_component *comp = snd_soc_dapm_to_component(w->dapm);
struct rt9123p_priv *rt9123p = snd_soc_component_get_drvdata(comp);
if (event & SND_SOC_DAPM_POST_PMU)
rt9123p->enable_switch = 1;
else if (event & SND_SOC_DAPM_POST_PMD)
rt9123p->enable_switch = 0;
return 0;
}
static const struct snd_soc_dapm_widget rt9123p_dapm_widgets[] = {
SND_SOC_DAPM_OUTPUT("SPK"),
SND_SOC_DAPM_OUT_DRV_E("Amp Drv", SND_SOC_NOPM, 0, 0, NULL, 0, rt9123p_enable_event,
SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_POST_PMD),
};
static const struct snd_soc_dapm_route rt9123p_dapm_routes[] = {
{"Amp Drv", NULL, "HiFi Playback"},
{"SPK", NULL, "Amp Drv"},
};
static const struct snd_soc_component_driver rt9123p_comp_driver = {
.dapm_widgets = rt9123p_dapm_widgets,
.num_dapm_widgets = ARRAY_SIZE(rt9123p_dapm_widgets),
.dapm_routes = rt9123p_dapm_routes,
.num_dapm_routes = ARRAY_SIZE(rt9123p_dapm_routes),
.idle_bias_on = 1,
.use_pmdown_time = 1,
.endianness = 1,
};
static const struct snd_soc_dai_ops rt9123p_dai_ops = {
.trigger = rt9123p_daiops_trigger,
};
static struct snd_soc_dai_driver rt9123p_dai_driver = {
.name = "HiFi",
.playback = {
.stream_name = "HiFi Playback",
.formats = SNDRV_PCM_FMTBIT_S16 | SNDRV_PCM_FMTBIT_S24 |
SNDRV_PCM_FMTBIT_S32,
.rates = SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_16000 |
SNDRV_PCM_RATE_22050 | SNDRV_PCM_RATE_24000 |
SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 |
SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_88200 |
SNDRV_PCM_RATE_96000,
.rate_min = 8000,
.rate_max = 96000,
.channels_min = 1,
.channels_max = 2,
},
.ops = &rt9123p_dai_ops,
};
static int rt9123p_platform_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct rt9123p_priv *rt9123p;
int ret;
rt9123p = devm_kzalloc(dev, sizeof(*rt9123p), GFP_KERNEL);
if (!rt9123p)
return -ENOMEM;
rt9123p->enable = devm_gpiod_get_optional(dev, "enable", GPIOD_OUT_LOW);
if (IS_ERR(rt9123p->enable))
return PTR_ERR(rt9123p->enable);
ret = device_property_read_u32(dev, "enable-delay-ms", &rt9123p->enable_delay);
if (ret) {
rt9123p->enable_delay = 0;
dev_dbg(dev, "no optional property 'enable-delay-ms' found, default: no delay\n");
}
platform_set_drvdata(pdev, rt9123p);
return devm_snd_soc_register_component(dev, &rt9123p_comp_driver, &rt9123p_dai_driver, 1);
}
#ifdef CONFIG_OF
static const struct of_device_id rt9123p_device_id[] = {
{ .compatible = "richtek,rt9123p" },
{}
};
MODULE_DEVICE_TABLE(of, rt9123p_device_id);
#endif
#ifdef CONFIG_ACPI
static const struct acpi_device_id rt9123p_acpi_match[] = {
{ "RT9123P", 0 },
{}
};
MODULE_DEVICE_TABLE(acpi, rt9123p_acpi_match);
#endif
static struct platform_driver rt9123p_platform_driver = {
.driver = {
.name = "rt9123p",
.of_match_table = of_match_ptr(rt9123p_device_id),
.acpi_match_table = ACPI_PTR(rt9123p_acpi_match),
},
.probe = rt9123p_platform_probe,
};
module_platform_driver(rt9123p_platform_driver);
MODULE_AUTHOR("ChiYuan Huang <cy_huang@richtek.com>");
MODULE_DESCRIPTION("ASoC rt9123p Driver");
MODULE_LICENSE("GPL");
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