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Linux/sound/soc/codecs/pcm3008.c

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  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 

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