aboutsummaryrefslogtreecommitdiffstats
path: root/sound/soc/codecs/wm8727.c
blob: 9d1df26281361ef9ed569e0b87a39d9a934f9254 (plain)
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
/*
 * wm8727.c
 *
 *  Created on: 15-Oct-2009
 *      Author: neil.jones@imgtec.com
 *
 * Copyright (C) 2009 Imagination Technologies Ltd.
 *
 *  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.
 */

#include <linux/init.h>
#include <linux/slab.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/device.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/ac97_codec.h>
#include <sound/initval.h>
#include <sound/soc.h>

#include "wm8727.h"
/*
 * Note this is a simple chip with no configuration interface, sample rate is
 * determined automatically by examining the Master clock and Bit clock ratios
 */
#define WM8727_RATES  (SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 |\
			SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_96000 |\
			SNDRV_PCM_RATE_192000)


struct snd_soc_dai wm8727_dai = {
	.name = "WM8727",
	.playback = {
		.stream_name = "Playback",
		.channels_min = 2,
		.channels_max = 2,
		.rates = WM8727_RATES,
		.formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_LE,
		},
};
EXPORT_SYMBOL_GPL(wm8727_dai);

static struct snd_soc_codec *wm8727_codec;

static int wm8727_soc_probe(struct platform_device *pdev)
{
	struct snd_soc_device *socdev = platform_get_drvdata(pdev);
	int ret = 0;

	BUG_ON(!wm8727_codec);

	socdev->card->codec = wm8727_codec;

	/* register pcms */
	ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1);
	if (ret < 0) {
		printk(KERN_ERR "wm8727: failed to create pcms\n");
		goto pcm_err;
	}

	return ret;

pcm_err:
	kfree(socdev->card->codec);
	socdev->card->codec = NULL;
	return ret;
}

static int wm8727_soc_remove(struct platform_device *pdev)
{
	struct snd_soc_device *socdev = platform_get_drvdata(pdev);

	snd_soc_free_pcms(socdev);

	return 0;
}

struct snd_soc_codec_device soc_codec_dev_wm8727 = {
	.probe = 	wm8727_soc_probe,
	.remove = 	wm8727_soc_remove,
};
EXPORT_SYMBOL_GPL(soc_codec_dev_wm8727);


static __devinit int wm8727_platform_probe(struct platform_device *pdev)
{
	struct snd_soc_codec *codec;
	int ret;

	if (wm8727_codec) {
		dev_err(&pdev->dev, "Another WM8727 is registered\n");
		return -EBUSY;
	}

	codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL);
	if (codec == NULL)
		return -ENOMEM;
	wm8727_codec = codec;

	platform_set_drvdata(pdev, codec);

	mutex_init(&codec->mutex);
	codec->dev = &pdev->dev;
	codec->name = "WM8727";
	codec->owner = THIS_MODULE;
	codec->dai = &wm8727_dai;
	codec->num_dai = 1;
	INIT_LIST_HEAD(&codec->dapm_widgets);
	INIT_LIST_HEAD(&codec->dapm_paths);

	wm8727_dai.dev = &pdev->dev;

	ret = snd_soc_register_codec(codec);
	if (ret != 0) {
		dev_err(&pdev->dev, "Failed to register CODEC: %d\n", ret);
		goto err;
	}

	ret = snd_soc_register_dai(&wm8727_dai);
	if (ret != 0) {
		dev_err(&pdev->dev, "Failed to register DAI: %d\n", ret);
		goto err_codec;
	}

	return 0;

err_codec:
	snd_soc_unregister_codec(codec);
err:
	kfree(codec);
	return ret;
}

static int __devexit wm8727_platform_remove(struct platform_device *pdev)
{
	snd_soc_unregister_dai(&wm8727_dai);
	snd_soc_unregister_codec(platform_get_drvdata(pdev));
	return 0;
}

static struct platform_driver wm8727_codec_driver = {
	.driver = {
			.name = "wm8727-codec",
			.owner = THIS_MODULE,
	},

	.probe = wm8727_platform_probe,
	.remove = __devexit_p(wm8727_platform_remove),
};

static int __init wm8727_init(void)
{
	return platform_driver_register(&wm8727_codec_driver);
}
module_init(wm8727_init);

static void __exit wm8727_exit(void)
{
	platform_driver_unregister(&wm8727_codec_driver);
}
module_exit(wm8727_exit);

MODULE_DESCRIPTION("ASoC wm8727 driver");
MODULE_AUTHOR("Neil Jones");
MODULE_LICENSE("GPL");