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184 lines
4.7 KiB
184 lines
4.7 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* Copyright (c) 2010-2011,2013-2015 The Linux Foundation. All rights reserved. |
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* |
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* max98357a.c -- MAX98357A ALSA SoC Codec driver |
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*/ |
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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/mod_devicetable.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 max98357a_priv { |
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struct gpio_desc *sdmode; |
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unsigned int sdmode_delay; |
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int sdmode_switch; |
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}; |
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static int max98357a_daiops_trigger(struct snd_pcm_substream *substream, |
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int cmd, struct snd_soc_dai *dai) |
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{ |
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struct snd_soc_component *component = dai->component; |
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struct max98357a_priv *max98357a = |
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snd_soc_component_get_drvdata(component); |
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if (!max98357a->sdmode) |
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return 0; |
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switch (cmd) { |
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case SNDRV_PCM_TRIGGER_START: |
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case SNDRV_PCM_TRIGGER_RESUME: |
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case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: |
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mdelay(max98357a->sdmode_delay); |
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if (max98357a->sdmode_switch) { |
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gpiod_set_value(max98357a->sdmode, 1); |
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dev_dbg(component->dev, "set sdmode to 1"); |
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} |
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break; |
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case SNDRV_PCM_TRIGGER_STOP: |
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case SNDRV_PCM_TRIGGER_SUSPEND: |
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case SNDRV_PCM_TRIGGER_PAUSE_PUSH: |
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gpiod_set_value(max98357a->sdmode, 0); |
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dev_dbg(component->dev, "set sdmode to 0"); |
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break; |
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} |
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return 0; |
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} |
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static int max98357a_sdmode_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 max98357a_priv *max98357a = |
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snd_soc_component_get_drvdata(component); |
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if (event & SND_SOC_DAPM_POST_PMU) |
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max98357a->sdmode_switch = 1; |
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else if (event & SND_SOC_DAPM_POST_PMD) |
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max98357a->sdmode_switch = 0; |
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return 0; |
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} |
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static const struct snd_soc_dapm_widget max98357a_dapm_widgets[] = { |
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SND_SOC_DAPM_OUTPUT("Speaker"), |
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SND_SOC_DAPM_OUT_DRV_E("SD_MODE", SND_SOC_NOPM, 0, 0, NULL, 0, |
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max98357a_sdmode_event, |
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SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_POST_PMD), |
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}; |
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static const struct snd_soc_dapm_route max98357a_dapm_routes[] = { |
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{"SD_MODE", NULL, "HiFi Playback"}, |
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{"Speaker", NULL, "SD_MODE"}, |
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}; |
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static const struct snd_soc_component_driver max98357a_component_driver = { |
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.dapm_widgets = max98357a_dapm_widgets, |
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.num_dapm_widgets = ARRAY_SIZE(max98357a_dapm_widgets), |
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.dapm_routes = max98357a_dapm_routes, |
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.num_dapm_routes = ARRAY_SIZE(max98357a_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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.non_legacy_dai_naming = 1, |
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}; |
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static const struct snd_soc_dai_ops max98357a_dai_ops = { |
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.trigger = max98357a_daiops_trigger, |
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}; |
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static struct snd_soc_dai_driver max98357a_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_S16 | |
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SNDRV_PCM_FMTBIT_S24 | |
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SNDRV_PCM_FMTBIT_S32, |
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.rates = SNDRV_PCM_RATE_8000 | |
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SNDRV_PCM_RATE_16000 | |
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SNDRV_PCM_RATE_32000 | |
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SNDRV_PCM_RATE_44100 | |
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SNDRV_PCM_RATE_48000 | |
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SNDRV_PCM_RATE_88200 | |
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SNDRV_PCM_RATE_96000, |
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.rate_min = 8000, |
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.rate_max = 96000, |
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.channels_min = 1, |
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.channels_max = 2, |
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}, |
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.ops = &max98357a_dai_ops, |
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}; |
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static int max98357a_platform_probe(struct platform_device *pdev) |
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{ |
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struct max98357a_priv *max98357a; |
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int ret; |
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max98357a = devm_kzalloc(&pdev->dev, sizeof(*max98357a), GFP_KERNEL); |
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if (!max98357a) |
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return -ENOMEM; |
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max98357a->sdmode = devm_gpiod_get_optional(&pdev->dev, |
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"sdmode", GPIOD_OUT_LOW); |
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if (IS_ERR(max98357a->sdmode)) |
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return PTR_ERR(max98357a->sdmode); |
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ret = device_property_read_u32(&pdev->dev, "sdmode-delay", |
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&max98357a->sdmode_delay); |
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if (ret) { |
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max98357a->sdmode_delay = 0; |
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dev_dbg(&pdev->dev, |
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"no optional property 'sdmode-delay' found, " |
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"default: no delay\n"); |
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} |
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dev_set_drvdata(&pdev->dev, max98357a); |
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return devm_snd_soc_register_component(&pdev->dev, |
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&max98357a_component_driver, |
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&max98357a_dai_driver, 1); |
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} |
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#ifdef CONFIG_OF |
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static const struct of_device_id max98357a_device_id[] = { |
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{ .compatible = "maxim,max98357a" }, |
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{ .compatible = "maxim,max98360a" }, |
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{} |
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}; |
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MODULE_DEVICE_TABLE(of, max98357a_device_id); |
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#endif |
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#ifdef CONFIG_ACPI |
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static const struct acpi_device_id max98357a_acpi_match[] = { |
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{ "MX98357A", 0 }, |
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{ "MX98360A", 0 }, |
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{}, |
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}; |
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MODULE_DEVICE_TABLE(acpi, max98357a_acpi_match); |
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#endif |
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static struct platform_driver max98357a_platform_driver = { |
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.driver = { |
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.name = "max98357a", |
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.of_match_table = of_match_ptr(max98357a_device_id), |
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.acpi_match_table = ACPI_PTR(max98357a_acpi_match), |
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}, |
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.probe = max98357a_platform_probe, |
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}; |
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module_platform_driver(max98357a_platform_driver); |
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MODULE_DESCRIPTION("Maxim MAX98357A Codec Driver"); |
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MODULE_LICENSE("GPL v2");
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