1 /* 2 * ALSA Soc PCM3008 codec support 3 * 4 * Author: Hugo Villeneuve 5 * Copyright (C) 2008 Lyrtech inc 6 * 7 * Based on AC97 Soc codec, original copyright follow: 8 * Copyright 2005 Wolfson Microelectronics PLC. 9 * 10 * This program is free software; you can redistribute it and/or modify it 11 * under the terms of the GNU General Public License as published by the 12 * Free Software Foundation; either version 2 of the License, or (at your 13 * option) any later version. 14 * 15 * Generic PCM3008 support. 16 */ 17 18 #include <linux/init.h> 19 #include <linux/kernel.h> 20 #include <linux/device.h> 21 #include <linux/gpio.h> 22 #include <linux/slab.h> 23 #include <linux/module.h> 24 #include <sound/core.h> 25 #include <sound/pcm.h> 26 #include <sound/initval.h> 27 #include <sound/soc.h> 28 29 #include "pcm3008.h" 30 31 static int pcm3008_dac_ev(struct snd_soc_dapm_widget *w, 32 struct snd_kcontrol *kcontrol, 33 int event) 34 { 35 struct snd_soc_codec *codec = w->codec; 36 struct pcm3008_setup_data *setup = codec->dev->platform_data; 37 38 gpio_set_value_cansleep(setup->pdda_pin, 39 SND_SOC_DAPM_EVENT_ON(event)); 40 41 return 0; 42 } 43 44 static int pcm3008_adc_ev(struct snd_soc_dapm_widget *w, 45 struct snd_kcontrol *kcontrol, 46 int event) 47 { 48 struct snd_soc_codec *codec = w->codec; 49 struct pcm3008_setup_data *setup = codec->dev->platform_data; 50 51 gpio_set_value_cansleep(setup->pdad_pin, 52 SND_SOC_DAPM_EVENT_ON(event)); 53 54 return 0; 55 } 56 57 static const struct snd_soc_dapm_widget pcm3008_dapm_widgets[] = { 58 SND_SOC_DAPM_INPUT("VINL"), 59 SND_SOC_DAPM_INPUT("VINR"), 60 61 SND_SOC_DAPM_DAC_E("DAC", NULL, SND_SOC_NOPM, 0, 0, pcm3008_dac_ev, 62 SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMD), 63 SND_SOC_DAPM_ADC_E("ADC", NULL, SND_SOC_NOPM, 0, 0, pcm3008_adc_ev, 64 SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMD), 65 66 SND_SOC_DAPM_OUTPUT("VOUTL"), 67 SND_SOC_DAPM_OUTPUT("VOUTR"), 68 }; 69 70 static const struct snd_soc_dapm_route pcm3008_dapm_routes[] = { 71 { "PCM3008 Capture", NULL, "ADC" }, 72 { "ADC", NULL, "VINL" }, 73 { "ADC", NULL, "VINR" }, 74 75 { "DAC", NULL, "PCM3008 Playback" }, 76 { "VOUTL", NULL, "DAC" }, 77 { "VOUTR", NULL, "DAC" }, 78 }; 79 80 #define PCM3008_RATES (SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 | \ 81 SNDRV_PCM_RATE_48000) 82 83 static struct snd_soc_dai_driver pcm3008_dai = { 84 .name = "pcm3008-hifi", 85 .playback = { 86 .stream_name = "PCM3008 Playback", 87 .channels_min = 1, 88 .channels_max = 2, 89 .rates = PCM3008_RATES, 90 .formats = SNDRV_PCM_FMTBIT_S16_LE, 91 }, 92 .capture = { 93 .stream_name = "PCM3008 Capture", 94 .channels_min = 1, 95 .channels_max = 2, 96 .rates = PCM3008_RATES, 97 .formats = SNDRV_PCM_FMTBIT_S16_LE, 98 }, 99 }; 100 101 static struct snd_soc_codec_driver soc_codec_dev_pcm3008 = { 102 .dapm_widgets = pcm3008_dapm_widgets, 103 .num_dapm_widgets = ARRAY_SIZE(pcm3008_dapm_widgets), 104 .dapm_routes = pcm3008_dapm_routes, 105 .num_dapm_routes = ARRAY_SIZE(pcm3008_dapm_routes), 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 snd_soc_register_codec(&pdev->dev, 148 &soc_codec_dev_pcm3008, &pcm3008_dai, 1); 149 } 150 151 static int pcm3008_codec_remove(struct platform_device *pdev) 152 { 153 snd_soc_unregister_codec(&pdev->dev); 154 155 return 0; 156 } 157 158 MODULE_ALIAS("platform:pcm3008-codec"); 159 160 static struct platform_driver pcm3008_codec_driver = { 161 .probe = pcm3008_codec_probe, 162 .remove = pcm3008_codec_remove, 163 .driver = { 164 .name = "pcm3008-codec", 165 .owner = THIS_MODULE, 166 }, 167 }; 168 169 module_platform_driver(pcm3008_codec_driver); 170 171 MODULE_DESCRIPTION("Soc PCM3008 driver"); 172 MODULE_AUTHOR("Hugo Villeneuve"); 173 MODULE_LICENSE("GPL"); 174