root/sound/soc/blackfin/bf5xx-ssm2602.c

DEFINITIONS

1. bf5xx_ssm2602_startup
2. bf5xx_ssm2602_hw_params
3. bf5xx_ssm2602_init
4. bf5xx_ssm2602_exit

/*
 * 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");