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Hugo Villeneuve1c0090c2008-11-19 01:37:31 -05001/*
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>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090022#include <linux/slab.h>
Hugo Villeneuve1c0090c2008-11-19 01:37:31 -050023#include <sound/core.h>
24#include <sound/pcm.h>
25#include <sound/initval.h>
26#include <sound/soc.h>
27
28#include "pcm3008.h"
29
30#define PCM3008_VERSION "0.2"
31
32#define PCM3008_RATES (SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 | \
33 SNDRV_PCM_RATE_48000)
34
35struct snd_soc_dai pcm3008_dai = {
36 .name = "PCM3008 HiFi",
Hugo Villeneuve1c0090c2008-11-19 01:37:31 -050037 .playback = {
38 .stream_name = "PCM3008 Playback",
39 .channels_min = 1,
40 .channels_max = 2,
41 .rates = PCM3008_RATES,
42 .formats = SNDRV_PCM_FMTBIT_S16_LE,
43 },
44 .capture = {
45 .stream_name = "PCM3008 Capture",
46 .channels_min = 1,
47 .channels_max = 2,
48 .rates = PCM3008_RATES,
49 .formats = SNDRV_PCM_FMTBIT_S16_LE,
50 },
51};
52EXPORT_SYMBOL_GPL(pcm3008_dai);
53
54static void pcm3008_gpio_free(struct pcm3008_setup_data *setup)
55{
56 gpio_free(setup->dem0_pin);
57 gpio_free(setup->dem1_pin);
58 gpio_free(setup->pdad_pin);
59 gpio_free(setup->pdda_pin);
60}
61
62static int pcm3008_soc_probe(struct platform_device *pdev)
63{
64 struct snd_soc_device *socdev = platform_get_drvdata(pdev);
65 struct snd_soc_codec *codec;
66 struct pcm3008_setup_data *setup = socdev->codec_data;
67 int ret = 0;
68
69 printk(KERN_INFO "PCM3008 SoC Audio Codec %s\n", PCM3008_VERSION);
70
Mark Brown6627a652009-01-23 22:55:23 +000071 socdev->card->codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL);
72 if (!socdev->card->codec)
Hugo Villeneuve1c0090c2008-11-19 01:37:31 -050073 return -ENOMEM;
74
Mark Brown6627a652009-01-23 22:55:23 +000075 codec = socdev->card->codec;
Hugo Villeneuve1c0090c2008-11-19 01:37:31 -050076 mutex_init(&codec->mutex);
77
78 codec->name = "PCM3008";
79 codec->owner = THIS_MODULE;
80 codec->dai = &pcm3008_dai;
81 codec->num_dai = 1;
82 codec->write = NULL;
83 codec->read = NULL;
84 INIT_LIST_HEAD(&codec->dapm_widgets);
85 INIT_LIST_HEAD(&codec->dapm_paths);
86
87 /* Register PCMs. */
88 ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1);
89 if (ret < 0) {
90 printk(KERN_ERR "pcm3008: failed to create pcms\n");
91 goto pcm_err;
92 }
93
Hugo Villeneuve1c0090c2008-11-19 01:37:31 -050094 /* DEM1 DEM0 DE-EMPHASIS_MODE
95 * Low Low De-emphasis 44.1 kHz ON
96 * Low High De-emphasis OFF
97 * High Low De-emphasis 48 kHz ON
98 * High High De-emphasis 32 kHz ON
99 */
100
101 /* Configure DEM0 GPIO (turning OFF DAC De-emphasis). */
102 ret = gpio_request(setup->dem0_pin, "codec_dem0");
103 if (ret == 0)
104 ret = gpio_direction_output(setup->dem0_pin, 1);
105 if (ret != 0)
106 goto gpio_err;
107
108 /* Configure DEM1 GPIO (turning OFF DAC De-emphasis). */
109 ret = gpio_request(setup->dem1_pin, "codec_dem1");
110 if (ret == 0)
111 ret = gpio_direction_output(setup->dem1_pin, 0);
112 if (ret != 0)
113 goto gpio_err;
114
115 /* Configure PDAD GPIO. */
116 ret = gpio_request(setup->pdad_pin, "codec_pdad");
117 if (ret == 0)
118 ret = gpio_direction_output(setup->pdad_pin, 1);
119 if (ret != 0)
120 goto gpio_err;
121
122 /* Configure PDDA GPIO. */
123 ret = gpio_request(setup->pdda_pin, "codec_pdda");
124 if (ret == 0)
125 ret = gpio_direction_output(setup->pdda_pin, 1);
126 if (ret != 0)
127 goto gpio_err;
128
129 return ret;
130
131gpio_err:
132 pcm3008_gpio_free(setup);
Hugo Villeneuve1c0090c2008-11-19 01:37:31 -0500133pcm_err:
Mark Brown6627a652009-01-23 22:55:23 +0000134 kfree(socdev->card->codec);
Hugo Villeneuve1c0090c2008-11-19 01:37:31 -0500135
136 return ret;
137}
138
139static int pcm3008_soc_remove(struct platform_device *pdev)
140{
141 struct snd_soc_device *socdev = platform_get_drvdata(pdev);
Mark Brown6627a652009-01-23 22:55:23 +0000142 struct snd_soc_codec *codec = socdev->card->codec;
Hugo Villeneuve1c0090c2008-11-19 01:37:31 -0500143 struct pcm3008_setup_data *setup = socdev->codec_data;
144
145 if (!codec)
146 return 0;
147
148 pcm3008_gpio_free(setup);
149 snd_soc_free_pcms(socdev);
Mark Brown6627a652009-01-23 22:55:23 +0000150 kfree(socdev->card->codec);
Hugo Villeneuve1c0090c2008-11-19 01:37:31 -0500151
152 return 0;
153}
154
155#ifdef CONFIG_PM
156static int pcm3008_soc_suspend(struct platform_device *pdev, pm_message_t msg)
157{
158 struct snd_soc_device *socdev = platform_get_drvdata(pdev);
159 struct pcm3008_setup_data *setup = socdev->codec_data;
160
161 gpio_set_value(setup->pdad_pin, 0);
162 gpio_set_value(setup->pdda_pin, 0);
163
164 return 0;
165}
166
167static int pcm3008_soc_resume(struct platform_device *pdev)
168{
169 struct snd_soc_device *socdev = platform_get_drvdata(pdev);
170 struct pcm3008_setup_data *setup = socdev->codec_data;
171
172 gpio_set_value(setup->pdad_pin, 1);
173 gpio_set_value(setup->pdda_pin, 1);
174
175 return 0;
176}
177#else
178#define pcm3008_soc_suspend NULL
179#define pcm3008_soc_resume NULL
180#endif
181
182struct snd_soc_codec_device soc_codec_dev_pcm3008 = {
183 .probe = pcm3008_soc_probe,
184 .remove = pcm3008_soc_remove,
185 .suspend = pcm3008_soc_suspend,
186 .resume = pcm3008_soc_resume,
187};
188EXPORT_SYMBOL_GPL(soc_codec_dev_pcm3008);
189
Takashi Iwaic9b3a402008-12-10 07:47:22 +0100190static int __init pcm3008_init(void)
Mark Brown64089b82008-12-08 19:17:58 +0000191{
192 return snd_soc_register_dai(&pcm3008_dai);
193}
194module_init(pcm3008_init);
195
196static void __exit pcm3008_exit(void)
197{
198 snd_soc_unregister_dai(&pcm3008_dai);
199}
200module_exit(pcm3008_exit);
201
Hugo Villeneuve1c0090c2008-11-19 01:37:31 -0500202MODULE_DESCRIPTION("Soc PCM3008 driver");
203MODULE_AUTHOR("Hugo Villeneuve");
204MODULE_LICENSE("GPL");