/*
* 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");
