156 lines
3.7 KiB
C
156 lines
3.7 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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//
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// rt1015p.c -- RT1015P ALSA SoC audio amplifier driver
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//
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// Copyright 2020 The Linux Foundation. All rights reserved.
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#include <linux/acpi.h>
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#include <linux/delay.h>
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#include <linux/device.h>
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#include <linux/err.h>
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#include <linux/gpio.h>
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#include <linux/gpio/consumer.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/of.h>
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#include <linux/platform_device.h>
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#include <sound/pcm.h>
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#include <sound/soc.h>
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#include <sound/soc-dai.h>
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#include <sound/soc-dapm.h>
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struct rt1015p_priv {
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struct gpio_desc *sdb;
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bool calib_done;
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};
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static int rt1015p_sdb_event(struct snd_soc_dapm_widget *w,
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struct snd_kcontrol *kcontrol, int event)
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{
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struct snd_soc_component *component =
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snd_soc_dapm_to_component(w->dapm);
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struct rt1015p_priv *rt1015p =
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snd_soc_component_get_drvdata(component);
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if (!rt1015p->sdb)
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return 0;
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switch (event) {
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case SND_SOC_DAPM_PRE_PMU:
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gpiod_set_value_cansleep(rt1015p->sdb, 1);
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dev_dbg(component->dev, "set sdb to 1");
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if (!rt1015p->calib_done) {
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msleep(300);
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rt1015p->calib_done = true;
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}
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break;
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case SND_SOC_DAPM_POST_PMD:
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gpiod_set_value_cansleep(rt1015p->sdb, 0);
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dev_dbg(component->dev, "set sdb to 0");
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break;
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default:
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break;
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}
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return 0;
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}
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static const struct snd_soc_dapm_widget rt1015p_dapm_widgets[] = {
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SND_SOC_DAPM_OUTPUT("Speaker"),
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SND_SOC_DAPM_OUT_DRV_E("SDB", SND_SOC_NOPM, 0, 0, NULL, 0,
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rt1015p_sdb_event,
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SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMD),
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};
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static const struct snd_soc_dapm_route rt1015p_dapm_routes[] = {
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{"SDB", NULL, "HiFi Playback"},
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{"Speaker", NULL, "SDB"},
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};
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#ifdef CONFIG_PM
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static int rt1015p_suspend(struct snd_soc_component *component)
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{
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struct rt1015p_priv *rt1015p = snd_soc_component_get_drvdata(component);
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rt1015p->calib_done = false;
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return 0;
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}
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#else
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#define rt1015p_suspend NULL
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#endif
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static const struct snd_soc_component_driver rt1015p_component_driver = {
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.suspend = rt1015p_suspend,
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.dapm_widgets = rt1015p_dapm_widgets,
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.num_dapm_widgets = ARRAY_SIZE(rt1015p_dapm_widgets),
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.dapm_routes = rt1015p_dapm_routes,
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.num_dapm_routes = ARRAY_SIZE(rt1015p_dapm_routes),
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.idle_bias_on = 1,
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.use_pmdown_time = 1,
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.endianness = 1,
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};
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static struct snd_soc_dai_driver rt1015p_dai_driver = {
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.name = "HiFi",
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.playback = {
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.stream_name = "HiFi Playback",
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.formats = SNDRV_PCM_FMTBIT_S24 |
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SNDRV_PCM_FMTBIT_S32,
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.rates = SNDRV_PCM_RATE_48000,
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.channels_min = 1,
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.channels_max = 2,
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},
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};
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static int rt1015p_platform_probe(struct platform_device *pdev)
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{
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struct rt1015p_priv *rt1015p;
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rt1015p = devm_kzalloc(&pdev->dev, sizeof(*rt1015p), GFP_KERNEL);
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if (!rt1015p)
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return -ENOMEM;
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rt1015p->sdb = devm_gpiod_get_optional(&pdev->dev,
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"sdb", GPIOD_OUT_LOW);
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if (IS_ERR(rt1015p->sdb))
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return PTR_ERR(rt1015p->sdb);
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dev_set_drvdata(&pdev->dev, rt1015p);
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return devm_snd_soc_register_component(&pdev->dev,
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&rt1015p_component_driver,
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&rt1015p_dai_driver, 1);
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}
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#ifdef CONFIG_OF
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static const struct of_device_id rt1015p_device_id[] = {
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{ .compatible = "realtek,rt1015p" },
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{ .compatible = "realtek,rt1019p" },
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{}
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};
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MODULE_DEVICE_TABLE(of, rt1015p_device_id);
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#endif
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#ifdef CONFIG_ACPI
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static const struct acpi_device_id rt1015p_acpi_match[] = {
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{ "RTL1015", 0},
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{ "RTL1019", 0},
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{ },
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};
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MODULE_DEVICE_TABLE(acpi, rt1015p_acpi_match);
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#endif
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static struct platform_driver rt1015p_platform_driver = {
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.driver = {
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.name = "rt1015p",
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.of_match_table = of_match_ptr(rt1015p_device_id),
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.acpi_match_table = ACPI_PTR(rt1015p_acpi_match),
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},
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.probe = rt1015p_platform_probe,
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};
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module_platform_driver(rt1015p_platform_driver);
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MODULE_DESCRIPTION("ASoC RT1015P driver");
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MODULE_LICENSE("GPL v2");
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