ASoC: Add support for Beagleboard

/*

 * omap3beagle.c  --  SoC audio for OMAP3 Beagle

 *

 * Author: Steve Sakoman <steve@sakoman.com>

 *

 * This program is free software; you can redistribute it and/or

 * modify it under the terms of the GNU General Public License

 * version 2 as published by the Free Software Foundation.

 *

 * This program is distributed in the hope that it will be useful, but

 * WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

 * General Public License for more details.

 *

 * You should have received a copy of the GNU General Public License

 * along with this program; if not, write to the Free Software

 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA

 * 02110-1301 USA

 *

 */

#include <linux/clk.h>

#include <linux/platform_device.h>

#include <sound/core.h>

#include <sound/pcm.h>

#include <sound/soc.h>

#include <sound/soc-dapm.h>

#include <asm/mach-types.h>

#include <mach/hardware.h>

#include <mach/gpio.h>

#include <mach/mcbsp.h>

#include "omap-mcbsp.h"

#include "omap-pcm.h"

#include "../codecs/twl4030.h"

static int omap3beagle_hw_params(struct snd_pcm_substream *substream,

	struct snd_pcm_hw_params *params)

{

	struct snd_soc_pcm_runtime *rtd = substream->private_data;

	struct snd_soc_dai *codec_dai = rtd->dai->codec_dai;

	struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai;

	int ret;

	/* Set codec DAI configuration */

	ret = snd_soc_dai_set_fmt(codec_dai,

				  SND_SOC_DAIFMT_I2S |

				  SND_SOC_DAIFMT_NB_NF |

				  SND_SOC_DAIFMT_CBM_CFM);

	if (ret < 0) {

		printk(KERN_ERR "can't set codec DAI configuration\n");

		return ret;

	}

	/* Set cpu DAI configuration */

	ret = snd_soc_dai_set_fmt(cpu_dai,

				  SND_SOC_DAIFMT_I2S |

				  SND_SOC_DAIFMT_NB_NF |

				  SND_SOC_DAIFMT_CBM_CFM);

	if (ret < 0) {

		printk(KERN_ERR "can't set cpu DAI configuration\n");

		return ret;

	}

	/* Set the codec system clock for DAC and ADC */

	ret = snd_soc_dai_set_sysclk(codec_dai, 0, 26000000,

				     SND_SOC_CLOCK_IN);

	if (ret < 0) {

		printk(KERN_ERR "can't set codec system clock\n");

		return ret;

	}

	return 0;

}

static struct snd_soc_ops omap3beagle_ops = {

	.hw_params = omap3beagle_hw_params,

};

/* Digital audio interface glue - connects codec <--> CPU */

static struct snd_soc_dai_link omap3beagle_dai = {

	.name = "TWL4030",

	.stream_name = "TWL4030",

	.cpu_dai = &omap_mcbsp_dai[0],

	.codec_dai = &twl4030_dai,

	.ops = &omap3beagle_ops,

};

/* Audio machine driver */

static struct snd_soc_machine snd_soc_machine_omap3beagle = {

	.name = "omap3beagle",

	.dai_link = &omap3beagle_dai,

	.num_links = 1,

};

/* Audio subsystem */

static struct snd_soc_device omap3beagle_snd_devdata = {

	.machine = &snd_soc_machine_omap3beagle,

	.platform = &omap_soc_platform,

	.codec_dev = &soc_codec_dev_twl4030,

};

static struct platform_device *omap3beagle_snd_device;

static int __init omap3beagle_soc_init(void)

{

	int ret;

	if (!machine_is_omap3_beagle()) {

		pr_debug("Not OMAP3 Beagle!\n");

		return -ENODEV;

	}

	pr_info("OMAP3 Beagle SoC init\n");

	omap3beagle_snd_device = platform_device_alloc("soc-audio", -1);

	if (!omap3beagle_snd_device) {

		printk(KERN_ERR "Platform device allocation failed\n");

		return -ENOMEM;

	}

	platform_set_drvdata(omap3beagle_snd_device, &omap3beagle_snd_devdata);

	omap3beagle_snd_devdata.dev = &omap3beagle_snd_device->dev;

	*(unsigned int *)omap3beagle_dai.cpu_dai->private_data = 1; /* McBSP2 */

	ret = platform_device_add(omap3beagle_snd_device);

	if (ret)

		goto err1;

	return 0;

err1:

	printk(KERN_ERR "Unable to add platform device\n");

	platform_device_put(omap3beagle_snd_device);

	return ret;

}

static void __exit omap3beagle_soc_exit(void)

{

	platform_device_unregister(omap3beagle_snd_device);

}

module_init(omap3beagle_soc_init);

module_exit(omap3beagle_soc_exit);

MODULE_AUTHOR("Steve Sakoman <steve@sakoman.com>");

MODULE_DESCRIPTION("ALSA SoC OMAP3 Beagle");

MODULE_LICENSE("GPL");