root/sound/soc/codecs/pcm3008.c

DEFINITIONS

1. pcm3008_dac_ev
2. pcm3008_adc_ev
3. pcm3008_codec_probe

   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");