aboutsummaryrefslogtreecommitdiffstats
path: root/sound/soc/codecs/pcm3008.c
blob: 8fb445f33f6f2a23c0d30f15c37ef590609c91cc (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
/*
 * ALSA Soc PCM3008 codec support
 *
 * Author:	Hugo Villeneuve
 * Copyright (C) 2008 Lyrtech inc
 *
 * Based on AC97 Soc codec, original copyright follow:
 * Copyright 2005 Wolfson Microelectronics PLC.
 *
 *  This program is free software; you can redistribute  it and/or modify it
 *  under  the terms of  the GNU General  Public License as published by the
 *  Free Software Foundation;  either version 2 of the  License, or (at your
 *  option) any later version.
 *
 * Generic PCM3008 support.
 */

#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/device.h>
#include <linux/gpio.h>
#include <linux/slab.h>
#include <linux/module.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/initval.h>
#include <sound/soc.h>

#include "pcm3008.h"

static int pcm3008_dac_ev(struct snd_soc_dapm_widget *w,
			  struct snd_kcontrol *kcontrol,
			  int event)
{
	struct snd_soc_codec *codec = snd_soc_dapm_to_codec(w->dapm);
	struct pcm3008_setup_data *setup = codec->dev->platform_data;

	gpio_set_value_cansleep(setup->pdda_pin,
				SND_SOC_DAPM_EVENT_ON(event));

	return 0;
}

static int pcm3008_adc_ev(struct snd_soc_dapm_widget *w,
			  struct snd_kcontrol *kcontrol,
			  int event)
{
	struct snd_soc_codec *codec = snd_soc_dapm_to_codec(w->dapm);
	struct pcm3008_setup_data *setup = codec->dev->platform_data;

	gpio_set_value_cansleep(setup->pdad_pin,
				SND_SOC_DAPM_EVENT_ON(event));

	return 0;
}

static const struct snd_soc_dapm_widget pcm3008_dapm_widgets[] = {
SND_SOC_DAPM_INPUT("VINL"),
SND_SOC_DAPM_INPUT("VINR"),

SND_SOC_DAPM_DAC_E("DAC", NULL, SND_SOC_NOPM, 0, 0, pcm3008_dac_ev,
		   SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMD),
SND_SOC_DAPM_ADC_E("ADC", NULL, SND_SOC_NOPM, 0, 0, pcm3008_adc_ev,
		   SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMD),

SND_SOC_DAPM_OUTPUT("VOUTL"),
SND_SOC_DAPM_OUTPUT("VOUTR"),
};

static const struct snd_soc_dapm_route pcm3008_dapm_routes[] = {
	{ "PCM3008 Capture", NULL, "ADC" },
	{ "ADC", NULL, "VINL" },
	{ "ADC", NULL, "VINR" },

	{ "DAC", NULL, "PCM3008 Playback" },
	{ "VOUTL", NULL, "DAC" },
	{ "VOUTR", NULL, "DAC" },
};

#define PCM3008_RATES (SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 |	\
		       SNDRV_PCM_RATE_48000)

static struct snd_soc_dai_driver pcm3008_dai = {
	.name = "pcm3008-hifi",
	.playback = {
		.stream_name = "PCM3008 Playback",
		.channels_min = 1,
		.channels_max = 2,
		.rates = PCM3008_RATES,
		.formats = SNDRV_PCM_FMTBIT_S16_LE,
	},
	.capture = {
		.stream_name = "PCM3008 Capture",
		.channels_min = 1,
		.channels_max = 2,
		.rates = PCM3008_RATES,
		.formats = SNDRV_PCM_FMTBIT_S16_LE,
	},
};

static struct snd_soc_codec_driver soc_codec_dev_pcm3008 = {
	.dapm_widgets = pcm3008_dapm_widgets,
	.num_dapm_widgets = ARRAY_SIZE(pcm3008_dapm_widgets),
	.dapm_routes = pcm3008_dapm_routes,
	.num_dapm_routes = ARRAY_SIZE(pcm3008_dapm_routes),
};

static int pcm3008_codec_probe(struct platform_device *pdev)
{
	struct pcm3008_setup_data *setup = pdev->dev.platform_data;
	int ret;

	if (!setup)
		return -EINVAL;

	/* DEM1  DEM0  DE-EMPHASIS_MODE
	 * Low   Low   De-emphasis 44.1 kHz ON
	 * Low   High  De-emphasis OFF
	 * High  Low   De-emphasis 48 kHz ON
	 * High  High  De-emphasis 32 kHz ON
	 */

	/* Configure DEM0 GPIO (turning OFF DAC De-emphasis). */
	ret = devm_gpio_request_one(&pdev->dev, setup->dem0_pin,
				    GPIOF_OUT_INIT_HIGH, "codec_dem0");
	if (ret != 0)
		return ret;

	/* Configure DEM1 GPIO (turning OFF DAC De-emphasis). */
	ret = devm_gpio_request_one(&pdev->dev, setup->dem1_pin,
				    GPIOF_OUT_INIT_LOW, "codec_dem1");
	if (ret != 0)
		return ret;

	/* Configure PDAD GPIO. */
	ret = devm_gpio_request_one(&pdev->dev, setup->pdad_pin,
				    GPIOF_OUT_INIT_LOW, "codec_pdad");
	if (ret != 0)
		return ret;

	/* Configure PDDA GPIO. */
	ret = devm_gpio_request_one(&pdev->dev, setup->pdda_pin,
				    GPIOF_OUT_INIT_LOW, "codec_pdda");
	if (ret != 0)
		return ret;

	return snd_soc_register_codec(&pdev->dev,
			&soc_codec_dev_pcm3008, &pcm3008_dai, 1);
}

static int pcm3008_codec_remove(struct platform_device *pdev)
{
	snd_soc_unregister_codec(&pdev->dev);

	return 0;
}

MODULE_ALIAS("platform:pcm3008-codec");

static struct platform_driver pcm3008_codec_driver = {
	.probe		= pcm3008_codec_probe,
	.remove		= pcm3008_codec_remove,
	.driver		= {
		.name	= "pcm3008-codec",
	},
};

module_platform_driver(pcm3008_codec_driver);

MODULE_DESCRIPTION("Soc PCM3008 driver");
MODULE_AUTHOR("Hugo Villeneuve");
MODULE_LICENSE("GPL");