1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * ALSA Soc PCM3008 codec support 4 * 5 * Author: Hugo Villeneuve 6 * Copyright (C) 2008 Lyrtech inc 7 * 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 27 static 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 40 static 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 53 static const struct snd_soc_dapm_widget pcm3008_dapm_widgets[] = { 54 SND_SOC_DAPM_INPUT("VINL"), 55 SND_SOC_DAPM_INPUT("VINR"), 56 57 SND_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), 59 SND_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 62 SND_SOC_DAPM_OUTPUT("VOUTL"), 63 SND_SOC_DAPM_OUTPUT("VOUTR"), 64 }; 65 66 static 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 79 static 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 97 static 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 .non_legacy_dai_naming = 1, 106 }; 107 108 static int pcm3008_codec_probe(struct platform_device *pdev) 109 { 110 struct pcm3008_setup_data *setup = pdev->dev.platform_data; 111 int ret; 112 113 if (!setup) 114 return -EINVAL; 115 116 /* DEM1 DEM0 DE-EMPHASIS_MODE 117 * Low Low De-emphasis 44.1 kHz ON 118 * Low High De-emphasis OFF 119 * High Low De-emphasis 48 kHz ON 120 * High High De-emphasis 32 kHz ON 121 */ 122 123 /* Configure DEM0 GPIO (turning OFF DAC De-emphasis). */ 124 ret = devm_gpio_request_one(&pdev->dev, setup->dem0_pin, 125 GPIOF_OUT_INIT_HIGH, "codec_dem0"); 126 if (ret != 0) 127 return ret; 128 129 /* Configure DEM1 GPIO (turning OFF DAC De-emphasis). */ 130 ret = devm_gpio_request_one(&pdev->dev, setup->dem1_pin, 131 GPIOF_OUT_INIT_LOW, "codec_dem1"); 132 if (ret != 0) 133 return ret; 134 135 /* Configure PDAD GPIO. */ 136 ret = devm_gpio_request_one(&pdev->dev, setup->pdad_pin, 137 GPIOF_OUT_INIT_LOW, "codec_pdad"); 138 if (ret != 0) 139 return ret; 140 141 /* Configure PDDA GPIO. */ 142 ret = devm_gpio_request_one(&pdev->dev, setup->pdda_pin, 143 GPIOF_OUT_INIT_LOW, "codec_pdda"); 144 if (ret != 0) 145 return ret; 146 147 return devm_snd_soc_register_component(&pdev->dev, 148 &soc_component_dev_pcm3008, &pcm3008_dai, 1); 149 } 150 151 MODULE_ALIAS("platform:pcm3008-codec"); 152 153 static struct platform_driver pcm3008_codec_driver = { 154 .probe = pcm3008_codec_probe, 155 .driver = { 156 .name = "pcm3008-codec", 157 }, 158 }; 159 160 module_platform_driver(pcm3008_codec_driver); 161 162 MODULE_DESCRIPTION("Soc PCM3008 driver"); 163 MODULE_AUTHOR("Hugo Villeneuve"); 164 MODULE_LICENSE("GPL"); 165