x86/speculation/mds: Fix documentation typo
[linux/fpc-iii.git] / sound / soc / codecs / pcm3008.c
blobe59d8ffb93bd65a2a6319aa3c24e7dc4d603a708
1 /*
2 * ALSA Soc PCM3008 codec support
4 * Author: Hugo Villeneuve
5 * Copyright (C) 2008 Lyrtech inc
7 * Based on AC97 Soc codec, original copyright follow:
8 * Copyright 2005 Wolfson Microelectronics PLC.
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.
15 * Generic PCM3008 support.
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>
29 #include "pcm3008.h"
31 static int pcm3008_dac_ev(struct snd_soc_dapm_widget *w,
32 struct snd_kcontrol *kcontrol,
33 int event)
35 struct snd_soc_codec *codec = snd_soc_dapm_to_codec(w->dapm);
36 struct pcm3008_setup_data *setup = codec->dev->platform_data;
38 gpio_set_value_cansleep(setup->pdda_pin,
39 SND_SOC_DAPM_EVENT_ON(event));
41 return 0;
44 static int pcm3008_adc_ev(struct snd_soc_dapm_widget *w,
45 struct snd_kcontrol *kcontrol,
46 int event)
48 struct snd_soc_codec *codec = snd_soc_dapm_to_codec(w->dapm);
49 struct pcm3008_setup_data *setup = codec->dev->platform_data;
51 gpio_set_value_cansleep(setup->pdad_pin,
52 SND_SOC_DAPM_EVENT_ON(event));
54 return 0;
57 static const struct snd_soc_dapm_widget pcm3008_dapm_widgets[] = {
58 SND_SOC_DAPM_INPUT("VINL"),
59 SND_SOC_DAPM_INPUT("VINR"),
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),
66 SND_SOC_DAPM_OUTPUT("VOUTL"),
67 SND_SOC_DAPM_OUTPUT("VOUTR"),
70 static const struct snd_soc_dapm_route pcm3008_dapm_routes[] = {
71 { "PCM3008 Capture", NULL, "ADC" },
72 { "ADC", NULL, "VINL" },
73 { "ADC", NULL, "VINR" },
75 { "DAC", NULL, "PCM3008 Playback" },
76 { "VOUTL", NULL, "DAC" },
77 { "VOUTR", NULL, "DAC" },
80 #define PCM3008_RATES (SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 | \
81 SNDRV_PCM_RATE_48000)
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,
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,
101 static const struct snd_soc_codec_driver soc_codec_dev_pcm3008 = {
102 .component_driver = {
103 .dapm_widgets = pcm3008_dapm_widgets,
104 .num_dapm_widgets = ARRAY_SIZE(pcm3008_dapm_widgets),
105 .dapm_routes = pcm3008_dapm_routes,
106 .num_dapm_routes = ARRAY_SIZE(pcm3008_dapm_routes),
110 static int pcm3008_codec_probe(struct platform_device *pdev)
112 struct pcm3008_setup_data *setup = pdev->dev.platform_data;
113 int ret;
115 if (!setup)
116 return -EINVAL;
118 /* DEM1 DEM0 DE-EMPHASIS_MODE
119 * Low Low De-emphasis 44.1 kHz ON
120 * Low High De-emphasis OFF
121 * High Low De-emphasis 48 kHz ON
122 * High High De-emphasis 32 kHz ON
125 /* Configure DEM0 GPIO (turning OFF DAC De-emphasis). */
126 ret = devm_gpio_request_one(&pdev->dev, setup->dem0_pin,
127 GPIOF_OUT_INIT_HIGH, "codec_dem0");
128 if (ret != 0)
129 return ret;
131 /* Configure DEM1 GPIO (turning OFF DAC De-emphasis). */
132 ret = devm_gpio_request_one(&pdev->dev, setup->dem1_pin,
133 GPIOF_OUT_INIT_LOW, "codec_dem1");
134 if (ret != 0)
135 return ret;
137 /* Configure PDAD GPIO. */
138 ret = devm_gpio_request_one(&pdev->dev, setup->pdad_pin,
139 GPIOF_OUT_INIT_LOW, "codec_pdad");
140 if (ret != 0)
141 return ret;
143 /* Configure PDDA GPIO. */
144 ret = devm_gpio_request_one(&pdev->dev, setup->pdda_pin,
145 GPIOF_OUT_INIT_LOW, "codec_pdda");
146 if (ret != 0)
147 return ret;
149 return snd_soc_register_codec(&pdev->dev,
150 &soc_codec_dev_pcm3008, &pcm3008_dai, 1);
153 static int pcm3008_codec_remove(struct platform_device *pdev)
155 snd_soc_unregister_codec(&pdev->dev);
157 return 0;
160 MODULE_ALIAS("platform:pcm3008-codec");
162 static struct platform_driver pcm3008_codec_driver = {
163 .probe = pcm3008_codec_probe,
164 .remove = pcm3008_codec_remove,
165 .driver = {
166 .name = "pcm3008-codec",
170 module_platform_driver(pcm3008_codec_driver);
172 MODULE_DESCRIPTION("Soc PCM3008 driver");
173 MODULE_AUTHOR("Hugo Villeneuve");
174 MODULE_LICENSE("GPL");