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awilliam
GitHub Repository: awilliam/linux-vfio
 Path: blob/master/sound/soc/kirkwood/kirkwood-openrd.c
10817 views
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/*

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 * kirkwood-openrd.c

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 *

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 * (c) 2010 Arnaud Patard <[email protected]>

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 * (c) 2010 Arnaud Patard <[email protected]>

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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/module.h>

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#include <linux/moduleparam.h>

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#include <linux/interrupt.h>

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#include <linux/platform_device.h>

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#include <linux/slab.h>

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#include <sound/soc.h>

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#include <mach/kirkwood.h>

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#include <plat/audio.h>

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#include <asm/mach-types.h>

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#include "../codecs/cs42l51.h"

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static int openrd_client_hw_params(struct snd_pcm_substream *substream,

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		struct snd_pcm_hw_params *params)

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{

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	struct snd_soc_pcm_runtime *rtd = substream->private_data;

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	struct snd_soc_dai *codec_dai = rtd->codec_dai;

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	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;

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	int ret;

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	unsigned int freq, fmt;

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	fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_CBS_CFS;

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	ret = snd_soc_dai_set_fmt(cpu_dai, fmt);

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	if (ret < 0)

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		return ret;

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	ret = snd_soc_dai_set_fmt(codec_dai, fmt);

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	if (ret < 0)

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		return ret;

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	switch (params_rate(params)) {

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	default:

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	case 44100:

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		freq = 11289600;

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		break;

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	case 48000:

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		freq = 12288000;

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		break;

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	case 96000:

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		freq = 24576000;

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		break;

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	}

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	return snd_soc_dai_set_sysclk(codec_dai, 0, freq, SND_SOC_CLOCK_IN);

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}

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static struct snd_soc_ops openrd_client_ops = {

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	.hw_params = openrd_client_hw_params,

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};

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static struct snd_soc_dai_link openrd_client_dai[] = {

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{

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	.name = "CS42L51",

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	.stream_name = "CS42L51 HiFi",

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	.cpu_dai_name = "kirkwood-i2s",

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	.platform_name = "kirkwood-pcm-audio",

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	.codec_dai_name = "cs42l51-hifi",

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	.codec_name = "cs42l51-codec.0-004a",

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	.ops = &openrd_client_ops,

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},

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};

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static struct snd_soc_card openrd_client = {

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	.name = "OpenRD Client",

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	.dai_link = openrd_client_dai,

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	.num_links = ARRAY_SIZE(openrd_client_dai),

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};

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static struct platform_device *openrd_client_snd_device;

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static int __init openrd_client_init(void)

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{

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	int ret;

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	if (!machine_is_openrd_client() && !machine_is_openrd_ultimate())

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		return 0;

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	openrd_client_snd_device = platform_device_alloc("soc-audio", -1);

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	if (!openrd_client_snd_device)

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		return -ENOMEM;

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	platform_set_drvdata(openrd_client_snd_device,

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			&openrd_client);

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	ret = platform_device_add(openrd_client_snd_device);

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	if (ret) {

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		printk(KERN_ERR "%s: platform_device_add failed\n", __func__);

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		platform_device_put(openrd_client_snd_device);

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	}

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	return ret;

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}

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static void __exit openrd_client_exit(void)

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{

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	platform_device_unregister(openrd_client_snd_device);

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}

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module_init(openrd_client_init);

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module_exit(openrd_client_exit);

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/* Module information */

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MODULE_AUTHOR("Arnaud Patard <[email protected]>");

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MODULE_DESCRIPTION("ALSA SoC OpenRD Client");

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MODULE_LICENSE("GPL");

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MODULE_ALIAS("platform:soc-audio");

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