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zoom2.c

/*
 * zoom2.c  --  SoC audio for Zoom2
 *
 * Author: Misael Lopez Cruz <x0052729@ti.com>
 *
 * 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"

#define ZOOM2_HEADSET_MUX_GPIO            (OMAP_MAX_GPIO_LINES + 15)
#define ZOOM2_HEADSET_EXTMUTE_GPIO  153

static int zoom2_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 zoom2_ops = {
      .hw_params = zoom2_hw_params,
};

static int zoom2_hw_voice_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_DSP_A |
                        SND_SOC_DAIFMT_IB_NF |
                        SND_SOC_DAIFMT_CBM_CFM);
      if (ret) {
            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_DSP_A |
                        SND_SOC_DAIFMT_IB_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 zoom2_voice_ops = {
      .hw_params = zoom2_hw_voice_params,
};

/* Zoom2 machine DAPM */
static const struct snd_soc_dapm_widget zoom2_twl4030_dapm_widgets[] = {
      SND_SOC_DAPM_MIC("Ext Mic", NULL),
      SND_SOC_DAPM_SPK("Ext Spk", NULL),
      SND_SOC_DAPM_MIC("Headset Mic", NULL),
      SND_SOC_DAPM_HP("Headset Stereophone", NULL),
      SND_SOC_DAPM_LINE("Aux In", NULL),
};

static const struct snd_soc_dapm_route audio_map[] = {
      /* External Mics: MAINMIC, SUBMIC with bias*/
      {"MAINMIC", NULL, "Mic Bias 1"},
      {"SUBMIC", NULL, "Mic Bias 2"},
      {"Mic Bias 1", NULL, "Ext Mic"},
      {"Mic Bias 2", NULL, "Ext Mic"},

      /* External Speakers: HFL, HFR */
      {"Ext Spk", NULL, "HFL"},
      {"Ext Spk", NULL, "HFR"},

      /* Headset Stereophone:  HSOL, HSOR */
      {"Headset Stereophone", NULL, "HSOL"},
      {"Headset Stereophone", NULL, "HSOR"},

      /* Headset Mic: HSMIC with bias */
      {"HSMIC", NULL, "Headset Mic Bias"},
      {"Headset Mic Bias", NULL, "Headset Mic"},

      /* Aux In: AUXL, AUXR */
      {"Aux In", NULL, "AUXL"},
      {"Aux In", NULL, "AUXR"},
};

static int zoom2_twl4030_init(struct snd_soc_codec *codec)
{
      int ret;

      /* Add Zoom2 specific widgets */
      ret = snd_soc_dapm_new_controls(codec, zoom2_twl4030_dapm_widgets,
                        ARRAY_SIZE(zoom2_twl4030_dapm_widgets));
      if (ret)
            return ret;

      /* Set up Zoom2 specific audio path audio_map */
      snd_soc_dapm_add_routes(codec, audio_map, ARRAY_SIZE(audio_map));

      /* Zoom2 connected pins */
      snd_soc_dapm_enable_pin(codec, "Ext Mic");
      snd_soc_dapm_enable_pin(codec, "Ext Spk");
      snd_soc_dapm_enable_pin(codec, "Headset Mic");
      snd_soc_dapm_enable_pin(codec, "Headset Stereophone");
      snd_soc_dapm_enable_pin(codec, "Aux In");

      /* TWL4030 not connected pins */
      snd_soc_dapm_nc_pin(codec, "CARKITMIC");
      snd_soc_dapm_nc_pin(codec, "DIGIMIC0");
      snd_soc_dapm_nc_pin(codec, "DIGIMIC1");

      snd_soc_dapm_nc_pin(codec, "OUTL");
      snd_soc_dapm_nc_pin(codec, "OUTR");
      snd_soc_dapm_nc_pin(codec, "EARPIECE");
      snd_soc_dapm_nc_pin(codec, "PREDRIVEL");
      snd_soc_dapm_nc_pin(codec, "PREDRIVER");
      snd_soc_dapm_nc_pin(codec, "CARKITL");
      snd_soc_dapm_nc_pin(codec, "CARKITR");

      ret = snd_soc_dapm_sync(codec);

      return ret;
}

static int zoom2_twl4030_voice_init(struct snd_soc_codec *codec)
{
      unsigned short reg;

      /* Enable voice interface */
      reg = codec->read(codec, TWL4030_REG_VOICE_IF);
      reg |= TWL4030_VIF_DIN_EN | TWL4030_VIF_DOUT_EN | TWL4030_VIF_EN;
      codec->write(codec, TWL4030_REG_VOICE_IF, reg);

      return 0;
}

/* Digital audio interface glue - connects codec <--> CPU */
static struct snd_soc_dai_link zoom2_dai[] = {
      {
            .name = "TWL4030 I2S",
            .stream_name = "TWL4030 Audio",
            .cpu_dai = &omap_mcbsp_dai[0],
            .codec_dai = &twl4030_dai[TWL4030_DAI_HIFI],
            .init = zoom2_twl4030_init,
            .ops = &zoom2_ops,
      },
      {
            .name = "TWL4030 PCM",
            .stream_name = "TWL4030 Voice",
            .cpu_dai = &omap_mcbsp_dai[1],
            .codec_dai = &twl4030_dai[TWL4030_DAI_VOICE],
            .init = zoom2_twl4030_voice_init,
            .ops = &zoom2_voice_ops,
      },
};

/* Audio machine driver */
static struct snd_soc_card snd_soc_zoom2 = {
      .name = "Zoom2",
      .platform = &omap_soc_platform,
      .dai_link = zoom2_dai,
      .num_links = ARRAY_SIZE(zoom2_dai),
};

/* EXTMUTE callback function */
void zoom2_set_hs_extmute(int mute)
{
      gpio_set_value(ZOOM2_HEADSET_EXTMUTE_GPIO, mute);
}

/* twl4030 setup */
static struct twl4030_setup_data twl4030_setup = {
      .ramp_delay_value = 3,  /* 161 ms */
      .sysclk = 26000,
      .hs_extmute = 1,
      .set_hs_extmute = zoom2_set_hs_extmute,
};

/* Audio subsystem */
static struct snd_soc_device zoom2_snd_devdata = {
      .card = &snd_soc_zoom2,
      .codec_dev = &soc_codec_dev_twl4030,
      .codec_data = &twl4030_setup,
};

static struct platform_device *zoom2_snd_device;

static int __init zoom2_soc_init(void)
{
      int ret;

      if (!machine_is_omap_zoom2()) {
            pr_debug("Not Zoom2!\n");
            return -ENODEV;
      }
      printk(KERN_INFO "Zoom2 SoC init\n");

      zoom2_snd_device = platform_device_alloc("soc-audio", -1);
      if (!zoom2_snd_device) {
            printk(KERN_ERR "Platform device allocation failed\n");
            return -ENOMEM;
      }

      platform_set_drvdata(zoom2_snd_device, &zoom2_snd_devdata);
      zoom2_snd_devdata.dev = &zoom2_snd_device->dev;
      *(unsigned int *)zoom2_dai[0].cpu_dai->private_data = 1; /* McBSP2 */
      *(unsigned int *)zoom2_dai[1].cpu_dai->private_data = 2; /* McBSP3 */

      ret = platform_device_add(zoom2_snd_device);
      if (ret)
            goto err1;

      BUG_ON(gpio_request(ZOOM2_HEADSET_MUX_GPIO, "hs_mux") < 0);
      gpio_direction_output(ZOOM2_HEADSET_MUX_GPIO, 0);

      BUG_ON(gpio_request(ZOOM2_HEADSET_EXTMUTE_GPIO, "ext_mute") < 0);
      gpio_direction_output(ZOOM2_HEADSET_EXTMUTE_GPIO, 0);

      return 0;

err1:
      printk(KERN_ERR "Unable to add platform device\n");
      platform_device_put(zoom2_snd_device);

      return ret;
}
module_init(zoom2_soc_init);

static void __exit zoom2_soc_exit(void)
{
      gpio_free(ZOOM2_HEADSET_MUX_GPIO);
      gpio_free(ZOOM2_HEADSET_EXTMUTE_GPIO);

      platform_device_unregister(zoom2_snd_device);
}
module_exit(zoom2_soc_exit);

MODULE_AUTHOR("Misael Lopez Cruz <x0052729@ti.com>");
MODULE_DESCRIPTION("ALSA SoC Zoom2");
MODULE_LICENSE("GPL");


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