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1// SPDX-License-Identifier: GPL-2.0-or-later2/*3 * ALSA Soc PCM3008 codec support4 *5 * Author: Hugo Villeneuve6 * Copyright (C) 2008 Lyrtech inc7 *8 * Based on AC97 Soc codec, original copyright follow:9 * Copyright 2005 Wolfson Microelectronics PLC.10 *11 * Generic PCM3008 support.12 */13 14#include <linux/init.h>15#include <linux/kernel.h>16#include <linux/device.h>17#include <linux/gpio.h>18#include <linux/slab.h>19#include <linux/module.h>20#include <sound/core.h>21#include <sound/pcm.h>22#include <sound/initval.h>23#include <sound/soc.h>24 25#include "pcm3008.h"26 27static int pcm3008_dac_ev(struct snd_soc_dapm_widget *w,28 struct snd_kcontrol *kcontrol,29 int event)30{31 struct snd_soc_component *component = snd_soc_dapm_to_component(w->dapm);32 struct pcm3008_setup_data *setup = component->dev->platform_data;33 34 gpio_set_value_cansleep(setup->pdda_pin,35 SND_SOC_DAPM_EVENT_ON(event));36 37 return 0;38}39 40static int pcm3008_adc_ev(struct snd_soc_dapm_widget *w,41 struct snd_kcontrol *kcontrol,42 int event)43{44 struct snd_soc_component *component = snd_soc_dapm_to_component(w->dapm);45 struct pcm3008_setup_data *setup = component->dev->platform_data;46 47 gpio_set_value_cansleep(setup->pdad_pin,48 SND_SOC_DAPM_EVENT_ON(event));49 50 return 0;51}52 53static const struct snd_soc_dapm_widget pcm3008_dapm_widgets[] = {54SND_SOC_DAPM_INPUT("VINL"),55SND_SOC_DAPM_INPUT("VINR"),56 57SND_SOC_DAPM_DAC_E("DAC", NULL, SND_SOC_NOPM, 0, 0, pcm3008_dac_ev,58 SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMD),59SND_SOC_DAPM_ADC_E("ADC", NULL, SND_SOC_NOPM, 0, 0, pcm3008_adc_ev,60 SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMD),61 62SND_SOC_DAPM_OUTPUT("VOUTL"),63SND_SOC_DAPM_OUTPUT("VOUTR"),64};65 66static const struct snd_soc_dapm_route pcm3008_dapm_routes[] = {67 { "PCM3008 Capture", NULL, "ADC" },68 { "ADC", NULL, "VINL" },69 { "ADC", NULL, "VINR" },70 71 { "DAC", NULL, "PCM3008 Playback" },72 { "VOUTL", NULL, "DAC" },73 { "VOUTR", NULL, "DAC" },74};75 76#define PCM3008_RATES (SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 | \77 SNDRV_PCM_RATE_48000)78 79static struct snd_soc_dai_driver pcm3008_dai = {80 .name = "pcm3008-hifi",81 .playback = {82 .stream_name = "PCM3008 Playback",83 .channels_min = 1,84 .channels_max = 2,85 .rates = PCM3008_RATES,86 .formats = SNDRV_PCM_FMTBIT_S16_LE,87 },88 .capture = {89 .stream_name = "PCM3008 Capture",90 .channels_min = 1,91 .channels_max = 2,92 .rates = PCM3008_RATES,93 .formats = SNDRV_PCM_FMTBIT_S16_LE,94 },95};96 97static const struct snd_soc_component_driver soc_component_dev_pcm3008 = {98 .dapm_widgets = pcm3008_dapm_widgets,99 .num_dapm_widgets = ARRAY_SIZE(pcm3008_dapm_widgets),100 .dapm_routes = pcm3008_dapm_routes,101 .num_dapm_routes = ARRAY_SIZE(pcm3008_dapm_routes),102 .idle_bias_on = 1,103 .use_pmdown_time = 1,104 .endianness = 1,105};106 107static int pcm3008_codec_probe(struct platform_device *pdev)108{109 struct pcm3008_setup_data *setup = pdev->dev.platform_data;110 int ret;111 112 if (!setup)113 return -EINVAL;114 115 /* DEM1 DEM0 DE-EMPHASIS_MODE116 * Low Low De-emphasis 44.1 kHz ON117 * Low High De-emphasis OFF118 * High Low De-emphasis 48 kHz ON119 * High High De-emphasis 32 kHz ON120 */121 122 /* Configure DEM0 GPIO (turning OFF DAC De-emphasis). */123 ret = devm_gpio_request_one(&pdev->dev, setup->dem0_pin,124 GPIOF_OUT_INIT_HIGH, "codec_dem0");125 if (ret != 0)126 return ret;127 128 /* Configure DEM1 GPIO (turning OFF DAC De-emphasis). */129 ret = devm_gpio_request_one(&pdev->dev, setup->dem1_pin,130 GPIOF_OUT_INIT_LOW, "codec_dem1");131 if (ret != 0)132 return ret;133 134 /* Configure PDAD GPIO. */135 ret = devm_gpio_request_one(&pdev->dev, setup->pdad_pin,136 GPIOF_OUT_INIT_LOW, "codec_pdad");137 if (ret != 0)138 return ret;139 140 /* Configure PDDA GPIO. */141 ret = devm_gpio_request_one(&pdev->dev, setup->pdda_pin,142 GPIOF_OUT_INIT_LOW, "codec_pdda");143 if (ret != 0)144 return ret;145 146 return devm_snd_soc_register_component(&pdev->dev,147 &soc_component_dev_pcm3008, &pcm3008_dai, 1);148}149 150MODULE_ALIAS("platform:pcm3008-codec");151 152static struct platform_driver pcm3008_codec_driver = {153 .probe = pcm3008_codec_probe,154 .driver = {155 .name = "pcm3008-codec",156 },157};158 159module_platform_driver(pcm3008_codec_driver);160 161MODULE_DESCRIPTION("Soc PCM3008 driver");162MODULE_AUTHOR("Hugo Villeneuve");163MODULE_LICENSE("GPL");164