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1// SPDX-License-Identifier: GPL-2.0-only2/* Copyright (c) 2010-2011,2013-2015 The Linux Foundation. All rights reserved.3 *4 * max98357a.c -- MAX98357A ALSA SoC Codec driver5 */6 7#include <linux/acpi.h>8#include <linux/delay.h>9#include <linux/device.h>10#include <linux/err.h>11#include <linux/gpio/consumer.h>12#include <linux/kernel.h>13#include <linux/mod_devicetable.h>14#include <linux/module.h>15#include <linux/of.h>16#include <linux/platform_device.h>17#include <sound/pcm.h>18#include <sound/soc.h>19#include <sound/soc-dai.h>20#include <sound/soc-dapm.h>21 22struct max98357a_priv {23 struct gpio_desc *sdmode;24 unsigned int sdmode_delay;25 int sdmode_switch;26};27 28static int max98357a_daiops_trigger(struct snd_pcm_substream *substream,29 int cmd, struct snd_soc_dai *dai)30{31 struct snd_soc_component *component = dai->component;32 struct max98357a_priv *max98357a =33 snd_soc_component_get_drvdata(component);34 35 if (!max98357a->sdmode)36 return 0;37 38 switch (cmd) {39 case SNDRV_PCM_TRIGGER_START:40 case SNDRV_PCM_TRIGGER_RESUME:41 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:42 mdelay(max98357a->sdmode_delay);43 if (max98357a->sdmode_switch) {44 gpiod_set_value(max98357a->sdmode, 1);45 dev_dbg(component->dev, "set sdmode to 1");46 }47 break;48 case SNDRV_PCM_TRIGGER_STOP:49 case SNDRV_PCM_TRIGGER_SUSPEND:50 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:51 gpiod_set_value(max98357a->sdmode, 0);52 dev_dbg(component->dev, "set sdmode to 0");53 break;54 }55 56 return 0;57}58 59static int max98357a_sdmode_event(struct snd_soc_dapm_widget *w,60 struct snd_kcontrol *kcontrol, int event)61{62 struct snd_soc_component *component =63 snd_soc_dapm_to_component(w->dapm);64 struct max98357a_priv *max98357a =65 snd_soc_component_get_drvdata(component);66 67 if (event & SND_SOC_DAPM_POST_PMU)68 max98357a->sdmode_switch = 1;69 else if (event & SND_SOC_DAPM_POST_PMD)70 max98357a->sdmode_switch = 0;71 72 return 0;73}74 75static const struct snd_soc_dapm_widget max98357a_dapm_widgets[] = {76 SND_SOC_DAPM_OUTPUT("Speaker"),77 SND_SOC_DAPM_OUT_DRV_E("SD_MODE", SND_SOC_NOPM, 0, 0, NULL, 0,78 max98357a_sdmode_event,79 SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_POST_PMD),80};81 82static const struct snd_soc_dapm_route max98357a_dapm_routes[] = {83 {"SD_MODE", NULL, "HiFi Playback"},84 {"Speaker", NULL, "SD_MODE"},85};86 87static const struct snd_soc_component_driver max98357a_component_driver = {88 .dapm_widgets = max98357a_dapm_widgets,89 .num_dapm_widgets = ARRAY_SIZE(max98357a_dapm_widgets),90 .dapm_routes = max98357a_dapm_routes,91 .num_dapm_routes = ARRAY_SIZE(max98357a_dapm_routes),92 .idle_bias_on = 1,93 .use_pmdown_time = 1,94 .endianness = 1,95};96 97static const struct snd_soc_dai_ops max98357a_dai_ops = {98 .trigger = max98357a_daiops_trigger,99};100 101static struct snd_soc_dai_driver max98357a_dai_driver = {102 .name = "HiFi",103 .playback = {104 .stream_name = "HiFi Playback",105 .formats = SNDRV_PCM_FMTBIT_S16 |106 SNDRV_PCM_FMTBIT_S24 |107 SNDRV_PCM_FMTBIT_S32,108 .rates = SNDRV_PCM_RATE_8000 |109 SNDRV_PCM_RATE_16000 |110 SNDRV_PCM_RATE_32000 |111 SNDRV_PCM_RATE_44100 |112 SNDRV_PCM_RATE_48000 |113 SNDRV_PCM_RATE_88200 |114 SNDRV_PCM_RATE_96000,115 .rate_min = 8000,116 .rate_max = 96000,117 .channels_min = 1,118 .channels_max = 2,119 },120 .ops = &max98357a_dai_ops,121};122 123static int max98357a_platform_probe(struct platform_device *pdev)124{125 struct max98357a_priv *max98357a;126 int ret;127 128 max98357a = devm_kzalloc(&pdev->dev, sizeof(*max98357a), GFP_KERNEL);129 if (!max98357a)130 return -ENOMEM;131 132 max98357a->sdmode = devm_gpiod_get_optional(&pdev->dev,133 "sdmode", GPIOD_OUT_LOW);134 if (IS_ERR(max98357a->sdmode))135 return PTR_ERR(max98357a->sdmode);136 137 ret = device_property_read_u32(&pdev->dev, "sdmode-delay",138 &max98357a->sdmode_delay);139 if (ret) {140 max98357a->sdmode_delay = 0;141 dev_dbg(&pdev->dev,142 "no optional property 'sdmode-delay' found, "143 "default: no delay\n");144 }145 146 dev_set_drvdata(&pdev->dev, max98357a);147 148 return devm_snd_soc_register_component(&pdev->dev,149 &max98357a_component_driver,150 &max98357a_dai_driver, 1);151}152 153#ifdef CONFIG_OF154static const struct of_device_id max98357a_device_id[] = {155 { .compatible = "maxim,max98357a" },156 { .compatible = "maxim,max98360a" },157 {}158};159MODULE_DEVICE_TABLE(of, max98357a_device_id);160#endif161 162#ifdef CONFIG_ACPI163static const struct acpi_device_id max98357a_acpi_match[] = {164 { "MX98357A", 0 },165 { "MX98360A", 0 },166 {},167};168MODULE_DEVICE_TABLE(acpi, max98357a_acpi_match);169#endif170 171static struct platform_driver max98357a_platform_driver = {172 .driver = {173 .name = "max98357a",174 .of_match_table = of_match_ptr(max98357a_device_id),175 .acpi_match_table = ACPI_PTR(max98357a_acpi_match),176 },177 .probe = max98357a_platform_probe,178};179module_platform_driver(max98357a_platform_driver);180 181MODULE_DESCRIPTION("Maxim MAX98357A Codec Driver");182MODULE_LICENSE("GPL v2");183