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sdp4430.c

/*
 * sdp4430.c  --  SoC audio for TI OMAP4430 SDP
 *
 * 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/jack.h>

#include <asm/mach-types.h>
#include <plat/hardware.h>
#include <plat/mux.h>

#include "mcpdm.h"
#include "omap-pcm.h"
#include "../codecs/twl6040.h"

static int twl6040_power_mode;

static int sdp4430_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;
      int clk_id, freq;
      int ret;

      if (twl6040_power_mode) {
            clk_id = TWL6040_SYSCLK_SEL_HPPLL;
            freq = 38400000;
      } else {
            clk_id = TWL6040_SYSCLK_SEL_LPPLL;
            freq = 32768;
      }

      /* set the codec mclk */
      ret = snd_soc_dai_set_sysclk(codec_dai, clk_id, freq,
                        SND_SOC_CLOCK_IN);
      if (ret) {
            printk(KERN_ERR "can't set codec system clock\n");
            return ret;
      }
      return ret;
}

static struct snd_soc_ops sdp4430_ops = {
      .hw_params = sdp4430_hw_params,
};

/* Headset jack */
static struct snd_soc_jack hs_jack;

/*Headset jack detection DAPM pins */
static struct snd_soc_jack_pin hs_jack_pins[] = {
      {
            .pin = "Headset Mic",
            .mask = SND_JACK_MICROPHONE,
      },
      {
            .pin = "Headset Stereophone",
            .mask = SND_JACK_HEADPHONE,
      },
};

static int sdp4430_get_power_mode(struct snd_kcontrol *kcontrol,
      struct snd_ctl_elem_value *ucontrol)
{
      ucontrol->value.integer.value[0] = twl6040_power_mode;
      return 0;
}

static int sdp4430_set_power_mode(struct snd_kcontrol *kcontrol,
      struct snd_ctl_elem_value *ucontrol)
{
      if (twl6040_power_mode == ucontrol->value.integer.value[0])
            return 0;

      twl6040_power_mode = ucontrol->value.integer.value[0];

      return 1;
}

static const char *power_texts[] = {"Low-Power", "High-Performance"};

static const struct soc_enum sdp4430_enum[] = {
      SOC_ENUM_SINGLE_EXT(2, power_texts),
};

static const struct snd_kcontrol_new sdp4430_controls[] = {
      SOC_ENUM_EXT("TWL6040 Power Mode", sdp4430_enum[0],
            sdp4430_get_power_mode, sdp4430_set_power_mode),
};

/* SDP4430 machine DAPM */
static const struct snd_soc_dapm_widget sdp4430_twl6040_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_SPK("Earphone Spk", NULL),
      SND_SOC_DAPM_INPUT("Aux/FM Stereo In"),
};

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

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

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

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

      /* Earphone speaker */
      {"Earphone Spk", NULL, "EP"},

      /* Aux/FM Stereo In: AFML, AFMR */
      {"AFML", NULL, "Aux/FM Stereo In"},
      {"AFMR", NULL, "Aux/FM Stereo In"},
};

static int sdp4430_twl6040_init(struct snd_soc_pcm_runtime *rtd)
{
      struct snd_soc_codec *codec = rtd->codec;
      struct snd_soc_dapm_context *dapm = &codec->dapm;
      int ret;

      /* Add SDP4430 specific controls */
      ret = snd_soc_add_controls(codec, sdp4430_controls,
                        ARRAY_SIZE(sdp4430_controls));
      if (ret)
            return ret;

      /* Add SDP4430 specific widgets */
      ret = snd_soc_dapm_new_controls(dapm, sdp4430_twl6040_dapm_widgets,
                        ARRAY_SIZE(sdp4430_twl6040_dapm_widgets));
      if (ret)
            return ret;

      /* Set up SDP4430 specific audio path audio_map */
      snd_soc_dapm_add_routes(dapm, audio_map, ARRAY_SIZE(audio_map));

      /* SDP4430 connected pins */
      snd_soc_dapm_enable_pin(dapm, "Ext Mic");
      snd_soc_dapm_enable_pin(dapm, "Ext Spk");
      snd_soc_dapm_enable_pin(dapm, "AFML");
      snd_soc_dapm_enable_pin(dapm, "AFMR");
      snd_soc_dapm_enable_pin(dapm, "Headset Mic");
      snd_soc_dapm_enable_pin(dapm, "Headset Stereophone");

      ret = snd_soc_dapm_sync(dapm);
      if (ret)
            return ret;

      /* Headset jack detection */
      ret = snd_soc_jack_new(codec, "Headset Jack",
                        SND_JACK_HEADSET, &hs_jack);
      if (ret)
            return ret;

      ret = snd_soc_jack_add_pins(&hs_jack, ARRAY_SIZE(hs_jack_pins),
                        hs_jack_pins);

      if (machine_is_omap_4430sdp())
            twl6040_hs_jack_detect(codec, &hs_jack, SND_JACK_HEADSET);
      else
            snd_soc_jack_report(&hs_jack, SND_JACK_HEADSET, SND_JACK_HEADSET);

      return ret;
}

/* Digital audio interface glue - connects codec <--> CPU */
static struct snd_soc_dai_link sdp4430_dai = {
      .name = "TWL6040",
      .stream_name = "TWL6040",
      .cpu_dai_name ="omap-mcpdm-dai",
      .codec_dai_name = "twl6040-hifi",
      .platform_name = "omap-pcm-audio",
      .codec_name = "twl6040-codec",
      .init = sdp4430_twl6040_init,
      .ops = &sdp4430_ops,
};

/* Audio machine driver */
static struct snd_soc_card snd_soc_sdp4430 = {
      .name = "SDP4430",
      .dai_link = &sdp4430_dai,
      .num_links = 1,
};

static struct platform_device *sdp4430_snd_device;

static int __init sdp4430_soc_init(void)
{
      int ret;

      if (!machine_is_omap_4430sdp())
            return -ENODEV;
      printk(KERN_INFO "SDP4430 SoC init\n");

      sdp4430_snd_device = platform_device_alloc("soc-audio", -1);
      if (!sdp4430_snd_device) {
            printk(KERN_ERR "Platform device allocation failed\n");
            return -ENOMEM;
      }

      platform_set_drvdata(sdp4430_snd_device, &snd_soc_sdp4430);

      ret = platform_device_add(sdp4430_snd_device);
      if (ret)
            goto err;

      /* Codec starts in HP mode */
      twl6040_power_mode = 1;

      return 0;

err:
      printk(KERN_ERR "Unable to add platform device\n");
      platform_device_put(sdp4430_snd_device);
      return ret;
}
module_init(sdp4430_soc_init);

static void __exit sdp4430_soc_exit(void)
{
      platform_device_unregister(sdp4430_snd_device);
}
module_exit(sdp4430_soc_exit);

MODULE_AUTHOR("Misael Lopez Cruz <x0052729@ti.com>");
MODULE_DESCRIPTION("ALSA SoC SDP4430");
MODULE_LICENSE("GPL");


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