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
31static 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
44static 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
57static const struct snd_soc_dapm_widget pcm3008_dapm_widgets[] = {
58SND_SOC_DAPM_INPUT("VINL"),
59SND_SOC_DAPM_INPUT("VINR"),
60
61SND_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),
63SND_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
66SND_SOC_DAPM_OUTPUT("VOUTL"),
67SND_SOC_DAPM_OUTPUT("VOUTR"),
68};
69
70static 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
83static 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
101static 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
108static 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
151static int pcm3008_codec_remove(struct platform_device *pdev)
152{
153	snd_soc_unregister_codec(&pdev->dev);
154
155	return 0;
156}
157
158MODULE_ALIAS("platform:pcm3008-codec");
159
160static 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
168module_platform_driver(pcm3008_codec_driver);
169
170MODULE_DESCRIPTION("Soc PCM3008 driver");
171MODULE_AUTHOR("Hugo Villeneuve");
172MODULE_LICENSE("GPL");
173