sound: ASoC: Blackfin: board driver for SSM2602 sound chip

/*

 * File:         sound/soc/blackfin/bf5xx-ssm2602.c

 * Author:       Cliff Cai <Cliff.Cai@analog.com>

 *

 * Created:      Tue June 06 2008

 * Description:  board driver for SSM2602 sound chip

 *

 * Modified:

 *               Copyright 2008 Analog Devices Inc.

 *

 * Bugs:         Enter bugs at http://blackfin.uclinux.org/

 *

 * 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.

 *

 * 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, see the file COPYING, or write

 * to the Free Software Foundation, Inc.,

 * 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA

 */

#include <linux/module.h>

#include <linux/moduleparam.h>

#include <linux/device.h>

#include <sound/core.h>

#include <sound/pcm.h>

#include <sound/soc.h>

#include <sound/soc-dapm.h>

#include <sound/pcm_params.h>

#include <asm/dma.h>

#include <asm/portmux.h>

#include <linux/gpio.h>

#include "../codecs/ssm2602.h"

#include "bf5xx-sport.h"

#include "bf5xx-i2s-pcm.h"

#include "bf5xx-i2s.h"

static struct snd_soc_machine bf5xx_ssm2602;

static int bf5xx_ssm2602_startup(struct snd_pcm_substream *substream)

{

	struct snd_soc_pcm_runtime *rtd = substream->private_data;

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

	pr_debug("%s enter\n", __func__);

	cpu_dai->private_data = sport_handle;

	return 0;

}

static int bf5xx_ssm2602_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;

	unsigned int clk = 0;

	int ret = 0;

	pr_debug("%s rate %d format %x\n", __func__, params_rate(params),

		params_format(params));

	/*

	 * If you are using a crystal source which frequency is not 12MHz

	 * then modify the below case statement with frequency of the crystal.

	 *

	 * If you are using the SPORT to generate clocking then this is

	 * where to do it.

	 */

	switch (params_rate(params)) {

	case 8000:

	case 16000:

	case 48000:

	case 96000:

	case 11025:

	case 22050:

	case 44100:

		clk = 12000000;

		break;

	}

	/*

	 * CODEC is master for BCLK and LRC in this configuration.

	 */

	/* set codec DAI configuration */

	ret = codec_dai->dai_ops.set_fmt(codec_dai, SND_SOC_DAIFMT_I2S |

		SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBM_CFM);

	if (ret < 0)

		return ret;

	/* set cpu DAI configuration */

	ret = cpu_dai->dai_ops.set_fmt(cpu_dai, SND_SOC_DAIFMT_I2S |

		SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBM_CFM);

	if (ret < 0)

		return ret;

	ret = codec_dai->dai_ops.set_sysclk(codec_dai, SSM2602_SYSCLK, clk,

		SND_SOC_CLOCK_IN);

	if (ret < 0)

		return ret;

	return 0;

}

static struct snd_soc_ops bf5xx_ssm2602_ops = {

	.startup = bf5xx_ssm2602_startup,

	.hw_params = bf5xx_ssm2602_hw_params,

};

static struct snd_soc_dai_link bf5xx_ssm2602_dai = {

	.name = "ssm2602",

	.stream_name = "SSM2602",

	.cpu_dai = &bf5xx_i2s_dai,

	.codec_dai = &ssm2602_dai,

	.ops = &bf5xx_ssm2602_ops,

};

/*

 * SSM2602 2 wire address is determined by CSB

 * state during powerup.

 *    low  = 0x1a

 *    high = 0x1b

 */

static struct ssm2602_setup_data bf5xx_ssm2602_setup = {

	.i2c_bus = 0,

	.i2c_address = 0x1b,

};

static struct snd_soc_machine bf5xx_ssm2602 = {

	.name = "bf5xx_ssm2602",

	.dai_link = &bf5xx_ssm2602_dai,

	.num_links = 1,

};

static struct snd_soc_device bf5xx_ssm2602_snd_devdata = {

	.machine = &bf5xx_ssm2602,

	.platform = &bf5xx_i2s_soc_platform,

	.codec_dev = &soc_codec_dev_ssm2602,

	.codec_data = &bf5xx_ssm2602_setup,

};

static struct platform_device *bf52x_ssm2602_snd_device;

static int __init bf5xx_ssm2602_init(void)

{

	int ret;

	pr_debug("%s enter\n", __func__);

	bf52x_ssm2602_snd_device = platform_device_alloc("soc-audio", -1);

	if (!bf52x_ssm2602_snd_device)

		return -ENOMEM;

	platform_set_drvdata(bf52x_ssm2602_snd_device,

				&bf5xx_ssm2602_snd_devdata);

	bf5xx_ssm2602_snd_devdata.dev = &bf52x_ssm2602_snd_device->dev;

	ret = platform_device_add(bf52x_ssm2602_snd_device);

	if (ret)

		platform_device_put(bf52x_ssm2602_snd_device);

	return ret;

}

static void __exit bf5xx_ssm2602_exit(void)

{

	pr_debug("%s enter\n", __func__);

	platform_device_unregister(bf52x_ssm2602_snd_device);

}

module_init(bf5xx_ssm2602_init);

module_exit(bf5xx_ssm2602_exit);

/* Module information */

MODULE_AUTHOR("Cliff Cai");

MODULE_DESCRIPTION("ALSA SoC SSM2602 BF527-EZKIT");

MODULE_LICENSE("GPL");