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155 lines
3.7 KiB
155 lines
3.7 KiB
// 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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