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rx51.c

/*
 * rx51.c  --  SoC audio for Nokia RX-51
 *
 * Copyright (C) 2008 - 2009 Nokia Corporation
 *
 * Contact: Peter Ujfalusi <peter.ujfalusi@nokia.com>
 *          Eduardo Valentin <eduardo.valentin@nokia.com>
 *          Jarkko Nikula <jhnikula@gmail.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/delay.h>
#include <linux/gpio.h>
#include <linux/platform_device.h>
#include <sound/core.h>
#include <sound/jack.h>
#include <sound/pcm.h>
#include <sound/soc.h>
#include <plat/mcbsp.h>

#include <asm/mach-types.h>

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

#define RX51_TVOUT_SEL_GPIO         40
#define RX51_JACK_DETECT_GPIO       177
/*
 * REVISIT: TWL4030 GPIO base in RX-51. Now statically defined to 192. This
 * gpio is reserved in arch/arm/mach-omap2/board-rx51-peripherals.c
 */
#define RX51_SPEAKER_AMP_TWL_GPIO   (192 + 7)

enum {
      RX51_JACK_DISABLED,
      RX51_JACK_TVOUT,        /* tv-out */
};

static int rx51_spk_func;
static int rx51_dmic_func;
static int rx51_jack_func;

static void rx51_ext_control(struct snd_soc_codec *codec)
{
      struct snd_soc_dapm_context *dapm = &codec->dapm;

      if (rx51_spk_func)
            snd_soc_dapm_enable_pin(dapm, "Ext Spk");
      else
            snd_soc_dapm_disable_pin(dapm, "Ext Spk");
      if (rx51_dmic_func)
            snd_soc_dapm_enable_pin(dapm, "DMic");
      else
            snd_soc_dapm_disable_pin(dapm, "DMic");

      gpio_set_value(RX51_TVOUT_SEL_GPIO,
                   rx51_jack_func == RX51_JACK_TVOUT);

      snd_soc_dapm_sync(dapm);
}

static int rx51_startup(struct snd_pcm_substream *substream)
{
      struct snd_pcm_runtime *runtime = substream->runtime;
      struct snd_soc_pcm_runtime *rtd = substream->private_data;
      struct snd_soc_codec *codec = rtd->codec;

      snd_pcm_hw_constraint_minmax(runtime,
                             SNDRV_PCM_HW_PARAM_CHANNELS, 2, 2);
      rx51_ext_control(codec);

      return 0;
}

static int rx51_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 err;

      /* Set codec DAI configuration */
      err = snd_soc_dai_set_fmt(codec_dai,
                          SND_SOC_DAIFMT_DSP_A |
                          SND_SOC_DAIFMT_IB_NF |
                          SND_SOC_DAIFMT_CBM_CFM);
      if (err < 0)
            return err;

      /* Set cpu DAI configuration */
      err = snd_soc_dai_set_fmt(cpu_dai,
                          SND_SOC_DAIFMT_DSP_A |
                          SND_SOC_DAIFMT_IB_NF |
                          SND_SOC_DAIFMT_CBM_CFM);
      if (err < 0)
            return err;

      /* Set the codec system clock for DAC and ADC */
      return snd_soc_dai_set_sysclk(codec_dai, 0, 19200000,
                              SND_SOC_CLOCK_IN);
}

static struct snd_soc_ops rx51_ops = {
      .startup = rx51_startup,
      .hw_params = rx51_hw_params,
};

static int rx51_get_spk(struct snd_kcontrol *kcontrol,
                  struct snd_ctl_elem_value *ucontrol)
{
      ucontrol->value.integer.value[0] = rx51_spk_func;

      return 0;
}

static int rx51_set_spk(struct snd_kcontrol *kcontrol,
                  struct snd_ctl_elem_value *ucontrol)
{
      struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);

      if (rx51_spk_func == ucontrol->value.integer.value[0])
            return 0;

      rx51_spk_func = ucontrol->value.integer.value[0];
      rx51_ext_control(codec);

      return 1;
}

static int rx51_spk_event(struct snd_soc_dapm_widget *w,
                    struct snd_kcontrol *k, int event)
{
      if (SND_SOC_DAPM_EVENT_ON(event))
            gpio_set_value_cansleep(RX51_SPEAKER_AMP_TWL_GPIO, 1);
      else
            gpio_set_value_cansleep(RX51_SPEAKER_AMP_TWL_GPIO, 0);

      return 0;
}

static int rx51_get_input(struct snd_kcontrol *kcontrol,
                    struct snd_ctl_elem_value *ucontrol)
{
      ucontrol->value.integer.value[0] = rx51_dmic_func;

      return 0;
}

static int rx51_set_input(struct snd_kcontrol *kcontrol,
                    struct snd_ctl_elem_value *ucontrol)
{
      struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);

      if (rx51_dmic_func == ucontrol->value.integer.value[0])
            return 0;

      rx51_dmic_func = ucontrol->value.integer.value[0];
      rx51_ext_control(codec);

      return 1;
}

static int rx51_get_jack(struct snd_kcontrol *kcontrol,
                   struct snd_ctl_elem_value *ucontrol)
{
      ucontrol->value.integer.value[0] = rx51_jack_func;

      return 0;
}

static int rx51_set_jack(struct snd_kcontrol *kcontrol,
                   struct snd_ctl_elem_value *ucontrol)
{
      struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);

      if (rx51_jack_func == ucontrol->value.integer.value[0])
            return 0;

      rx51_jack_func = ucontrol->value.integer.value[0];
      rx51_ext_control(codec);

      return 1;
}

static struct snd_soc_jack rx51_av_jack;

static struct snd_soc_jack_gpio rx51_av_jack_gpios[] = {
      {
            .gpio = RX51_JACK_DETECT_GPIO,
            .name = "avdet-gpio",
            .report = SND_JACK_VIDEOOUT,
            .invert = 1,
            .debounce_time = 200,
      },
};

static const struct snd_soc_dapm_widget aic34_dapm_widgets[] = {
      SND_SOC_DAPM_SPK("Ext Spk", rx51_spk_event),
      SND_SOC_DAPM_MIC("DMic", NULL),
};

static const struct snd_soc_dapm_route audio_map[] = {
      {"Ext Spk", NULL, "HPLOUT"},
      {"Ext Spk", NULL, "HPROUT"},

      {"DMic Rate 64", NULL, "Mic Bias 2V"},
      {"Mic Bias 2V", NULL, "DMic"},
};

static const char *spk_function[] = {"Off", "On"};
static const char *input_function[] = {"ADC", "Digital Mic"};
static const char *jack_function[] = {"Off", "TV-OUT"};

static const struct soc_enum rx51_enum[] = {
      SOC_ENUM_SINGLE_EXT(ARRAY_SIZE(spk_function), spk_function),
      SOC_ENUM_SINGLE_EXT(ARRAY_SIZE(input_function), input_function),
      SOC_ENUM_SINGLE_EXT(ARRAY_SIZE(jack_function), jack_function),
};

static const struct snd_kcontrol_new aic34_rx51_controls[] = {
      SOC_ENUM_EXT("Speaker Function", rx51_enum[0],
                 rx51_get_spk, rx51_set_spk),
      SOC_ENUM_EXT("Input Select",  rx51_enum[1],
                 rx51_get_input, rx51_set_input),
      SOC_ENUM_EXT("Jack Function", rx51_enum[2],
                 rx51_get_jack, rx51_set_jack),
};

static int rx51_aic34_init(struct snd_soc_pcm_runtime *rtd)
{
      struct snd_soc_codec *codec = rtd->codec;
      struct snd_soc_dapm_context *dapm = &codec->dapm;
      int err;

      /* Set up NC codec pins */
      snd_soc_dapm_nc_pin(dapm, "MIC3L");
      snd_soc_dapm_nc_pin(dapm, "MIC3R");
      snd_soc_dapm_nc_pin(dapm, "LINE1R");

      /* Add RX-51 specific controls */
      err = snd_soc_add_controls(codec, aic34_rx51_controls,
                           ARRAY_SIZE(aic34_rx51_controls));
      if (err < 0)
            return err;

      /* Add RX-51 specific widgets */
      snd_soc_dapm_new_controls(dapm, aic34_dapm_widgets,
                          ARRAY_SIZE(aic34_dapm_widgets));

      /* Set up RX-51 specific audio path audio_map */
      snd_soc_dapm_add_routes(dapm, audio_map, ARRAY_SIZE(audio_map));

      snd_soc_dapm_sync(dapm);

      /* AV jack detection */
      err = snd_soc_jack_new(codec, "AV Jack",
                         SND_JACK_VIDEOOUT, &rx51_av_jack);
      if (err)
            return err;
      err = snd_soc_jack_add_gpios(&rx51_av_jack,
                             ARRAY_SIZE(rx51_av_jack_gpios),
                             rx51_av_jack_gpios);

      return err;
}

/* Digital audio interface glue - connects codec <--> CPU */
static struct snd_soc_dai_link rx51_dai[] = {
      {
            .name = "TLV320AIC34",
            .stream_name = "AIC34",
            .cpu_dai_name = "omap-mcbsp-dai.1",
            .codec_dai_name = "tlv320aic3x-hifi",
            .platform_name = "omap-pcm-audio",
            .codec_name = "tlv320aic3x-codec.2-0018",
            .init = rx51_aic34_init,
            .ops = &rx51_ops,
      },
};

/* Audio card */
static struct snd_soc_card rx51_sound_card = {
      .name = "RX-51",
      .dai_link = rx51_dai,
      .num_links = ARRAY_SIZE(rx51_dai),
};

static struct platform_device *rx51_snd_device;

static int __init rx51_soc_init(void)
{
      int err;

      if (!machine_is_nokia_rx51())
            return -ENODEV;

      err = gpio_request(RX51_TVOUT_SEL_GPIO, "tvout_sel");
      if (err)
            goto err_gpio_tvout_sel;
      gpio_direction_output(RX51_TVOUT_SEL_GPIO, 0);

      rx51_snd_device = platform_device_alloc("soc-audio", -1);
      if (!rx51_snd_device) {
            err = -ENOMEM;
            goto err1;
      }

      platform_set_drvdata(rx51_snd_device, &rx51_sound_card);

      err = platform_device_add(rx51_snd_device);
      if (err)
            goto err2;

      return 0;
err2:
      platform_device_put(rx51_snd_device);
err1:
      gpio_free(RX51_TVOUT_SEL_GPIO);
err_gpio_tvout_sel:

      return err;
}

static void __exit rx51_soc_exit(void)
{
      snd_soc_jack_free_gpios(&rx51_av_jack, ARRAY_SIZE(rx51_av_jack_gpios),
                        rx51_av_jack_gpios);

      platform_device_unregister(rx51_snd_device);
      gpio_free(RX51_TVOUT_SEL_GPIO);
}

module_init(rx51_soc_init);
module_exit(rx51_soc_exit);

MODULE_AUTHOR("Nokia Corporation");
MODULE_DESCRIPTION("ALSA SoC Nokia RX-51");
MODULE_LICENSE("GPL");

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