You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
123 lines
2.8 KiB
123 lines
2.8 KiB
/*
|
|
* ads117x.c -- Driver for ads1174/8 ADC chips
|
|
*
|
|
* Copyright 2009 ShotSpotter Inc.
|
|
* Author: Graeme Gregory <gg@slimlogic.co.uk>
|
|
*
|
|
* 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/kernel.h>
|
|
#include <linux/init.h>
|
|
#include <linux/device.h>
|
|
#include <sound/core.h>
|
|
#include <sound/pcm.h>
|
|
#include <sound/initval.h>
|
|
#include <sound/soc.h>
|
|
|
|
#include "ads117x.h"
|
|
|
|
#define ADS117X_RATES (SNDRV_PCM_RATE_8000_48000)
|
|
|
|
#define ADS117X_FORMATS (SNDRV_PCM_FMTBIT_S16_LE)
|
|
|
|
struct snd_soc_dai ads117x_dai = {
|
|
/* ADC */
|
|
.name = "ADS117X ADC",
|
|
.id = 1,
|
|
.capture = {
|
|
.stream_name = "Capture",
|
|
.channels_min = 1,
|
|
.channels_max = 32,
|
|
.rates = ADS117X_RATES,
|
|
.formats = ADS117X_FORMATS,},
|
|
};
|
|
EXPORT_SYMBOL_GPL(ads117x_dai);
|
|
|
|
static int ads117x_probe(struct platform_device *pdev)
|
|
{
|
|
struct snd_soc_device *socdev = platform_get_drvdata(pdev);
|
|
struct snd_soc_codec *codec;
|
|
int ret;
|
|
|
|
codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL);
|
|
if (codec == NULL)
|
|
return -ENOMEM;
|
|
|
|
socdev->card->codec = codec;
|
|
mutex_init(&codec->mutex);
|
|
INIT_LIST_HEAD(&codec->dapm_widgets);
|
|
INIT_LIST_HEAD(&codec->dapm_paths);
|
|
codec->name = "ADS117X";
|
|
codec->owner = THIS_MODULE;
|
|
codec->dai = &ads117x_dai;
|
|
codec->num_dai = 1;
|
|
|
|
/* register pcms */
|
|
ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1);
|
|
if (ret < 0) {
|
|
printk(KERN_ERR "ads117x: failed to create pcms\n");
|
|
kfree(codec);
|
|
return ret;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int ads117x_remove(struct platform_device *pdev)
|
|
{
|
|
struct snd_soc_device *socdev = platform_get_drvdata(pdev);
|
|
struct snd_soc_codec *codec = socdev->card->codec;
|
|
|
|
snd_soc_free_pcms(socdev);
|
|
kfree(codec);
|
|
|
|
return 0;
|
|
}
|
|
|
|
struct snd_soc_codec_device soc_codec_dev_ads117x = {
|
|
.probe = ads117x_probe,
|
|
.remove = ads117x_remove,
|
|
};
|
|
EXPORT_SYMBOL_GPL(soc_codec_dev_ads117x);
|
|
|
|
static __devinit int ads117x_platform_probe(struct platform_device *pdev)
|
|
{
|
|
ads117x_dai.dev = &pdev->dev;
|
|
return snd_soc_register_dai(&ads117x_dai);
|
|
}
|
|
|
|
static int __devexit ads117x_platform_remove(struct platform_device *pdev)
|
|
{
|
|
snd_soc_unregister_dai(&ads117x_dai);
|
|
return 0;
|
|
}
|
|
|
|
static struct platform_driver ads117x_codec_driver = {
|
|
.driver = {
|
|
.name = "ads117x",
|
|
.owner = THIS_MODULE,
|
|
},
|
|
|
|
.probe = ads117x_platform_probe,
|
|
.remove = __devexit_p(ads117x_platform_remove),
|
|
};
|
|
|
|
static int __init ads117x_init(void)
|
|
{
|
|
return platform_driver_register(&ads117x_codec_driver);
|
|
}
|
|
module_init(ads117x_init);
|
|
|
|
static void __exit ads117x_exit(void)
|
|
{
|
|
platform_driver_unregister(&ads117x_codec_driver);
|
|
}
|
|
module_exit(ads117x_exit);
|
|
|
|
MODULE_DESCRIPTION("ASoC ads117x driver");
|
|
MODULE_AUTHOR("Graeme Gregory");
|
|
MODULE_LICENSE("GPL");
|
|
|