[linux-2.6-block.git] / sound / soc / codecs / ads117x.c

/*
 * 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);

/*
 * initialise the ads117x driver
 */
static int ads117x_init(struct snd_soc_device *socdev)
{
	struct snd_soc_codec *codec = socdev->card->codec;
	int ret = 0;

	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");
		return ret;
	}

	ret = snd_soc_init_card(socdev);
	if (ret < 0) {
		printk(KERN_ERR "ads117x: failed to register card\n");
		goto card_err;
	}
	return ret;

card_err:
	snd_soc_free_pcms(socdev);
	return ret;
}

static int ads117x_probe(struct platform_device *pdev)
{
	struct snd_soc_device *socdev = platform_get_drvdata(pdev);
	struct snd_soc_codec *codec;
	int ret;

	pr_info("ads117x ADC\n");

	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);

	ret = ads117x_init(socdev);
	if (ret != 0)
		kfree(codec);

	return ret;
}

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 int __init ads117x_modinit(void)
{
	return snd_soc_register_dai(&ads117x_dai);
}
module_init(ads117x_modinit);

static void __exit ads117x_exit(void)
{
	snd_soc_unregister_dai(&ads117x_dai);
}
module_exit(ads117x_exit);

MODULE_DESCRIPTION("ASoC ads117x driver");
MODULE_AUTHOR("Graeme Gregory");
MODULE_LICENSE("GPL");
Commit	Line	Data
2dcf9fb9 GG	1	/*
	2	* ads117x.c -- Driver for ads1174/8 ADC chips
	3	*
	4	* Copyright 2009 ShotSpotter Inc.
	5	* Author: Graeme Gregory <gg@slimlogic.co.uk>
	6	*
	7	* This program is free software; you can redistribute it and/or modify it
	8	* under the terms of the GNU General Public License as published by the
	9	* Free Software Foundation; either version 2 of the License, or (at your
	10	* option) any later version.
	11	*/
	12
	13	#include <linux/kernel.h>
	14	#include <linux/init.h>
	15	#include <linux/device.h>
	16	#include <sound/core.h>
	17	#include <sound/pcm.h>
	18	#include <sound/initval.h>
	19	#include <sound/soc.h>
	20
	21	#include "ads117x.h"
	22
	23	#define ADS117X_RATES (SNDRV_PCM_RATE_8000_48000)
	24
	25	#define ADS117X_FORMATS (SNDRV_PCM_FMTBIT_S16_LE)
	26
	27	struct snd_soc_dai ads117x_dai = {
	28	/* ADC */
	29	.name = "ADS117X ADC",
	30	.id = 1,
	31	.capture = {
	32	.stream_name = "Capture",
	33	.channels_min = 1,
	34	.channels_max = 32,
	35	.rates = ADS117X_RATES,
	36	.formats = ADS117X_FORMATS,},
	37	};
	38	EXPORT_SYMBOL_GPL(ads117x_dai);
	39
	40	/*
	41	* initialise the ads117x driver
	42	*/
	43	static int ads117x_init(struct snd_soc_device *socdev)
	44	{
	45	struct snd_soc_codec *codec = socdev->card->codec;
	46	int ret = 0;
	47
	48	codec->name = "ADS117X";
	49	codec->owner = THIS_MODULE;
	50	codec->dai = &ads117x_dai;
	51	codec->num_dai = 1;
	52
	53	/* register pcms */
	54	ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1);
	55	if (ret < 0) {
	56	printk(KERN_ERR "ads117x: failed to create pcms\n");
	57	return ret;
	58	}
	59
	60	ret = snd_soc_init_card(socdev);
	61	if (ret < 0) {
	62	printk(KERN_ERR "ads117x: failed to register card\n");
	63	goto card_err;
	64	}
65	return ret;
66
67	card_err:
68	snd_soc_free_pcms(socdev);
69	return ret;
70	}
71
72	static int ads117x_probe(struct platform_device *pdev)
73	{
74	struct snd_soc_device *socdev = platform_get_drvdata(pdev);
75	struct snd_soc_codec *codec;
76	int ret;
77
78	pr_info("ads117x ADC\n");
79
80	codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL);
81	if (codec == NULL)
82	return -ENOMEM;
83
84	socdev->card->codec = codec;
85	mutex_init(&codec->mutex);
86	INIT_LIST_HEAD(&codec->dapm_widgets);
87	INIT_LIST_HEAD(&codec->dapm_paths);
88
89	ret = ads117x_init(socdev);
90	if (ret != 0)
91	kfree(codec);
92
93	return ret;
94	}
95
96	static int ads117x_remove(struct platform_device *pdev)
97	{
98	struct snd_soc_device *socdev = platform_get_drvdata(pdev);
99	struct snd_soc_codec *codec = socdev->card->codec;
100
101	snd_soc_free_pcms(socdev);
102	kfree(codec);
103
104	return 0;
105	}
106
107	struct snd_soc_codec_device soc_codec_dev_ads117x = {
108	.probe = ads117x_probe,
109	.remove = ads117x_remove,
110	};
111	EXPORT_SYMBOL_GPL(soc_codec_dev_ads117x);
112
113	static int __init ads117x_modinit(void)
114	{
115	return snd_soc_register_dai(&ads117x_dai);
116	}
117	module_init(ads117x_modinit);
118
119	static void __exit ads117x_exit(void)
120	{
121	snd_soc_unregister_dai(&ads117x_dai);
122	}
123	module_exit(ads117x_exit);
124
125	MODULE_DESCRIPTION("ASoC ads117x driver");
126	MODULE_AUTHOR("Graeme Gregory");
127	MODULE_LICENSE("GPL");