text: /*
   * 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 <sound/soc-dapm.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"
  #include "../codecs/twl4030.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->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 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 = &omap_mcbsp_dai[0],
  	.codec_dai = &twl4030_dai[TWL4030_DAI_HIFI],
  	.ops = &igep2_ops,
  };
  
  /* Audio machine driver */
  static struct snd_soc_card snd_soc_card_igep2 = {
  	.name = "igep2",
  	.platform = &omap_soc_platform,
  	.dai_link = &igep2_dai,
  	.num_links = 1,
  };
  
  /* Audio subsystem */
  static struct snd_soc_device igep2_snd_devdata = {
  	.card = &snd_soc_card_igep2,
  	.codec_dev = &soc_codec_dev_twl4030,
  };
  
  static struct platform_device *igep2_snd_device;
  
  static int __init igep2_soc_init(void)
  {
  	int ret;
  
  	if (!machine_is_igep0020()) {
  		pr_debug("Not IGEP v2!\n");
  		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, &igep2_snd_devdata);
  	igep2_snd_devdata.dev = &igep2_snd_device->dev;
  	*(unsigned int *)igep2_dai.cpu_dai->private_data = 1; /* McBSP2 */
  
  	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");
  