124 lines
2.8 KiB
C
124 lines
2.8 KiB
C
/*
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* ads117x.c -- Driver for ads1174/8 ADC chips
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*
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* Copyright 2009 ShotSpotter Inc.
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* Author: Graeme Gregory <gg@slimlogic.co.uk>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*/
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/device.h>
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#include <sound/core.h>
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#include <sound/pcm.h>
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#include <sound/initval.h>
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#include <sound/soc.h>
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#include "ads117x.h"
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#define ADS117X_RATES (SNDRV_PCM_RATE_8000_48000)
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#define ADS117X_FORMATS (SNDRV_PCM_FMTBIT_S16_LE)
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struct snd_soc_dai ads117x_dai = {
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/* ADC */
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.name = "ADS117X ADC",
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.id = 1,
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.capture = {
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.stream_name = "Capture",
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.channels_min = 1,
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.channels_max = 32,
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.rates = ADS117X_RATES,
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.formats = ADS117X_FORMATS,},
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};
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EXPORT_SYMBOL_GPL(ads117x_dai);
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static int ads117x_probe(struct platform_device *pdev)
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{
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struct snd_soc_device *socdev = platform_get_drvdata(pdev);
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struct snd_soc_codec *codec;
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int ret;
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codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL);
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if (codec == NULL)
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return -ENOMEM;
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socdev->card->codec = codec;
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mutex_init(&codec->mutex);
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INIT_LIST_HEAD(&codec->dapm_widgets);
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INIT_LIST_HEAD(&codec->dapm_paths);
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codec->name = "ADS117X";
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codec->owner = THIS_MODULE;
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codec->dai = &ads117x_dai;
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codec->num_dai = 1;
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/* register pcms */
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ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1);
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if (ret < 0) {
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printk(KERN_ERR "ads117x: failed to create pcms\n");
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kfree(codec);
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return ret;
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}
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return 0;
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}
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static int ads117x_remove(struct platform_device *pdev)
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{
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struct snd_soc_device *socdev = platform_get_drvdata(pdev);
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struct snd_soc_codec *codec = socdev->card->codec;
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snd_soc_free_pcms(socdev);
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kfree(codec);
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return 0;
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}
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struct snd_soc_codec_device soc_codec_dev_ads117x = {
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.probe = ads117x_probe,
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.remove = ads117x_remove,
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};
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EXPORT_SYMBOL_GPL(soc_codec_dev_ads117x);
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static __devinit int ads117x_platform_probe(struct platform_device *pdev)
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{
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ads117x_dai.dev = &pdev->dev;
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return snd_soc_register_dai(&ads117x_dai);
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}
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static int __devexit ads117x_platform_remove(struct platform_device *pdev)
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{
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snd_soc_unregister_dai(&ads117x_dai);
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return 0;
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}
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static struct platform_driver ads117x_codec_driver = {
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.driver = {
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.name = "ads117x",
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.owner = THIS_MODULE,
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},
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.probe = ads117x_platform_probe,
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.remove = __devexit_p(ads117x_platform_remove),
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};
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static int __init ads117x_init(void)
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{
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return platform_driver_register(&ads117x_codec_driver);
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}
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module_init(ads117x_init);
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static void __exit ads117x_exit(void)
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{
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platform_driver_unregister(&ads117x_codec_driver);
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}
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module_exit(ads117x_exit);
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MODULE_DESCRIPTION("ASoC ads117x driver");
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MODULE_AUTHOR("Graeme Gregory");
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MODULE_LICENSE("GPL");
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