| 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 = snd_soc_dapm_to_codec(w->dapm); |
| 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 = snd_soc_dapm_to_codec(w->dapm); |
| 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 | }, |
| 166 | }; |
| 167 | |
| 168 | module_platform_driver(pcm3008_codec_driver); |
| 169 | |
| 170 | MODULE_DESCRIPTION("Soc PCM3008 driver"); |
| 171 | MODULE_AUTHOR("Hugo Villeneuve"); |
| 172 | MODULE_LICENSE("GPL"); |