[linux-2.6-block.git] / sound / soc / codecs / wm8727.c

/*
 * 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;
	}

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");
Commit	Line	Data
89933dee NJ	1	/*
	2	* wm8727.c
	3	*
	4	* Created on: 15-Oct-2009
	5	* Author: neil.jones@imgtec.com
	6	*
	7	* Copyright (C) 2009 Imagination Technologies Ltd.
	8	*
	9	* This program is free software; you can redistribute it and/or modify it
	10	* under the terms of the GNU General Public License as published by the
	11	* Free Software Foundation; either version 2 of the License, or (at your
	12	* option) any later version.
	13	*/
	14
	15	#include <linux/init.h>
5a0e3ad6	16	#include <linux/slab.h>
89933dee NJ	17	#include <linux/module.h>
	18	#include <linux/kernel.h>
	19	#include <linux/device.h>
	20	#include <sound/core.h>
	21	#include <sound/pcm.h>
	22	#include <sound/ac97_codec.h>
	23	#include <sound/initval.h>
	24	#include <sound/soc.h>
	25
	26	#include "wm8727.h"
	27	/*
	28	* Note this is a simple chip with no configuration interface, sample rate is
	29	* determined automatically by examining the Master clock and Bit clock ratios
	30	*/
	31	#define WM8727_RATES (SNDRV_PCM_RATE_32000 \| SNDRV_PCM_RATE_44100 \|\
	32	SNDRV_PCM_RATE_48000 \| SNDRV_PCM_RATE_96000 \|\
	33	SNDRV_PCM_RATE_192000)
	34
	35
	36	struct snd_soc_dai wm8727_dai = {
	37	.name = "WM8727",
	38	.playback = {
	39	.stream_name = "Playback",
	40	.channels_min = 2,
	41	.channels_max = 2,
	42	.rates = WM8727_RATES,
	43	.formats = SNDRV_PCM_FMTBIT_S16_LE \| SNDRV_PCM_FMTBIT_S24_LE,
	44	},
	45	};
	46	EXPORT_SYMBOL_GPL(wm8727_dai);
	47
cce2e9db MB	48	static struct snd_soc_codec *wm8727_codec;
cce2e9db MB	49
89933dee NJ	50	static int wm8727_soc_probe(struct platform_device *pdev)
	51	{
	52	struct snd_soc_device *socdev = platform_get_drvdata(pdev);
89933dee NJ	53	int ret = 0;
89933dee NJ	54
cce2e9db MB	55	BUG_ON(!wm8727_codec);
	56
	57	socdev->card->codec = wm8727_codec;
89933dee NJ	58
	59	/* register pcms */
	60	ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1);
	61	if (ret < 0) {
	62	printk(KERN_ERR "wm8727: failed to create pcms\n");
	63	goto pcm_err;
	64	}
89933dee NJ	65
	66	return ret;
	67
89933dee NJ	68	pcm_err:
	69	kfree(socdev->card->codec);
	70	socdev->card->codec = NULL;
	71	return ret;
	72	}
	73
	74	static int wm8727_soc_remove(struct platform_device *pdev)
	75	{
	76	struct snd_soc_device *socdev = platform_get_drvdata(pdev);
89933dee	77
89933dee	78	snd_soc_free_pcms(socdev);
cce2e9db	79
89933dee NJ	80	return 0;
	81	}
	82
	83	struct snd_soc_codec_device soc_codec_dev_wm8727 = {
	84	.probe = wm8727_soc_probe,
	85	.remove = wm8727_soc_remove,
	86	};
	87	EXPORT_SYMBOL_GPL(soc_codec_dev_wm8727);
	88
	89
	90	static __devinit int wm8727_platform_probe(struct platform_device *pdev)
	91	{
cce2e9db MB	92	struct snd_soc_codec *codec;
	93	int ret;
	94
	95	if (wm8727_codec) {
	96	dev_err(&pdev->dev, "Another WM8727 is registered\n");
	97	return -EBUSY;
	98	}
	99
	100	codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL);
	101	if (codec == NULL)
	102	return -ENOMEM;
	103	wm8727_codec = codec;
	104
	105	platform_set_drvdata(pdev, codec);
	106
	107	mutex_init(&codec->mutex);
	108	codec->dev = &pdev->dev;
	109	codec->name = "WM8727";
	110	codec->owner = THIS_MODULE;
	111	codec->dai = &wm8727_dai;
	112	codec->num_dai = 1;
	113	INIT_LIST_HEAD(&codec->dapm_widgets);
	114	INIT_LIST_HEAD(&codec->dapm_paths);
	115
89933dee	116	wm8727_dai.dev = &pdev->dev;
cce2e9db MB	117
	118	ret = snd_soc_register_codec(codec);
	119	if (ret != 0) {
	120	dev_err(&pdev->dev, "Failed to register CODEC: %d\n", ret);
	121	goto err;
	122	}
	123
	124	ret = snd_soc_register_dai(&wm8727_dai);
	125	if (ret != 0) {
	126	dev_err(&pdev->dev, "Failed to register DAI: %d\n", ret);
	127	goto err_codec;
	128	}
	129
	130	err_codec:
	131	snd_soc_unregister_codec(codec);
	132	err:
	133	kfree(codec);
	134	return ret;
89933dee NJ	135	}
	136
	137	static int __devexit wm8727_platform_remove(struct platform_device *pdev)
	138	{
	139	snd_soc_unregister_dai(&wm8727_dai);
cce2e9db	140	snd_soc_unregister_codec(platform_get_drvdata(pdev));
89933dee NJ	141	return 0;
	142	}
	143
529697c5	144	static struct platform_driver wm8727_codec_driver = {
89933dee NJ	145	.driver = {
	146	.name = "wm8727-codec",
	147	.owner = THIS_MODULE,
	148	},
	149
	150	.probe = wm8727_platform_probe,
	151	.remove = __devexit_p(wm8727_platform_remove),
	152	};
	153
	154	static int __init wm8727_init(void)
	155	{
	156	return platform_driver_register(&wm8727_codec_driver);
	157	}
	158	module_init(wm8727_init);
	159
	160	static void __exit wm8727_exit(void)
	161	{
	162	platform_driver_unregister(&wm8727_codec_driver);
	163	}
	164	module_exit(wm8727_exit);
	165
	166	MODULE_DESCRIPTION("ASoC wm8727 driver");
	167	MODULE_AUTHOR("Neil Jones");
	168	MODULE_LICENSE("GPL");