/*
* omap2evm.c -- SoC audio machine driver for omap2evm board
*
* Author: Arun KS <arunks@mistralsolutions.com>
*
* Based on sound/soc/omap/overo.c by Steve Sakoman
*
* 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 omap2evm_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params,
struct snd_soc_dai *dai)
{
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 omap2evm_ops = {
.hw_params = omap2evm_hw_params,
};
/* Digital audio interface glue - connects codec <--> CPU */
static struct snd_soc_dai_link omap2evm_dai = {
.name = "TWL4030",
.stream_name = "TWL4030",
.cpu_dai = &omap_mcbsp_dai[0],
.codec_dai = &twl4030_dai,
.ops = &omap2evm_ops,
};
/* Audio machine driver */
static struct snd_soc_card snd_soc_omap2evm = {
.name = "omap2evm",
.platform = &omap_soc_platform,
.dai_link = &omap2evm_dai,
.num_links = 1,
};
/* Audio subsystem */
static struct snd_soc_device omap2evm_snd_devdata = {
.card = &snd_soc_omap2evm,
.codec_dev = &soc_codec_dev_twl4030,
};
static struct platform_device *omap2evm_snd_device;
static int __init omap2evm_soc_init(void)
{
int ret;
if (!machine_is_omap2evm()) {
pr_debug("Not omap2evm!\n");
return -ENODEV;
}
printk(KERN_INFO "omap2evm SoC init\n");
omap2evm_snd_device = platform_device_alloc("soc-audio", -1);
if (!omap2evm_snd_device) {
printk(KERN_ERR "Platform device allocation failed\n");
return -ENOMEM;
}
platform_set_drvdata(omap2evm_snd_device, &omap2evm_snd_devdata);
omap2evm_snd_devdata.dev = &omap2evm_snd_device->dev;
*(unsigned int *)omap2evm_dai.cpu_dai->private_data = 1; /* McBSP2 */
ret = platform_device_add(omap2evm_snd_device);
if (ret)
goto err1;
return 0;
err1:
printk(KERN_ERR "Unable to add platform device\n");
platform_device_put(omap2evm_snd_device);
return ret;
}
module_init(omap2evm_soc_init);
static void __exit omap2evm_soc_exit(void)
{
platform_device_unregister(omap2evm_snd_device);
}
module_exit(omap2evm_soc_exit);
MODULE_AUTHOR("Arun KS <arunks@mistralsolutions.com>");
MODULE_DESCRIPTION("ALSA SoC omap2evm");
MODULE_LICENSE("GPL");
