Logo Search packages:      
Sourcecode: alsa-driver version File versions  Download package

igep0020.c

/*
 * igep0020.c  --  SoC audio for IGEP v2
 *
 * 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 <asm/mach-types.h>
#include <mach/hardware.h>
#include <mach/gpio.h>
#include <plat/mcbsp.h>

#include "omap-mcbsp.h"
#include "omap-pcm.h"

static int igep2_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->codec_dai;
      struct snd_soc_dai *cpu_dai = rtd->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 igep2_ops = {
      .hw_params = igep2_hw_params,
};

/* Digital audio interface glue - connects codec <--> CPU */
static struct snd_soc_dai_link igep2_dai = {
      .name = "TWL4030",
      .stream_name = "TWL4030",
      .cpu_dai_name = "omap-mcbsp-dai.1",
      .codec_dai_name = "twl4030-hifi",
      .platform_name = "omap-pcm-audio",
      .codec_name = "twl4030-codec",
      .ops = &igep2_ops,
};

/* Audio machine driver */
static struct snd_soc_card snd_soc_card_igep2 = {
      .name = "igep2",
      .dai_link = &igep2_dai,
      .num_links = 1,
};

static struct platform_device *igep2_snd_device;

static int __init igep2_soc_init(void)
{
      int ret;

      if (!machine_is_igep0020())
            return -ENODEV;
      printk(KERN_INFO "IGEP v2 SoC init\n");

      igep2_snd_device = platform_device_alloc("soc-audio", -1);
      if (!igep2_snd_device) {
            printk(KERN_ERR "Platform device allocation failed\n");
            return -ENOMEM;
      }

      platform_set_drvdata(igep2_snd_device, &snd_soc_card_igep2);

      ret = platform_device_add(igep2_snd_device);
      if (ret)
            goto err1;

      return 0;

err1:
      printk(KERN_ERR "Unable to add platform device\n");
      platform_device_put(igep2_snd_device);

      return ret;
}
module_init(igep2_soc_init);

static void __exit igep2_soc_exit(void)
{
      platform_device_unregister(igep2_snd_device);
}
module_exit(igep2_soc_exit);

MODULE_AUTHOR("Enric Balletbo i Serra <eballetbo@iseebcn.com>");
MODULE_DESCRIPTION("ALSA SoC IGEP v2");
MODULE_LICENSE("GPL");

Generated by  Doxygen 1.6.0   Back to index