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tosa.c

/*
 * tosa.c  --  SoC audio for Tosa
 *
 * Copyright 2005 Wolfson Microelectronics PLC.
 * Copyright 2005 Openedhand Ltd.
 *
 * Authors: Liam Girdwood <liam.girdwood@wolfsonmicro.com>
 *          Richard Purdie <richard@openedhand.com>
 *
 *  This program is free software; you can redistribute  it and/or modify it
 *  under  the terms of  the GNU General  Public License as published by the
 *  Free Software Foundation;  either version 2 of the  License, or (at your
 *  option) any later version.
 *
 * GPIO's
 *  1 - Jack Insertion
 *  5 - Hookswitch (headset answer/hang up switch)
 *
 */

#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/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 <asm/hardware/tmio.h>
#include <asm/arch/pxa-regs.h>
#include <asm/arch/hardware.h>
#include <asm/arch/audio.h>
#include <asm/arch/tosa.h>

#include "../codecs/wm9712.h"
#include "pxa2xx-pcm.h"
#include "pxa2xx-ac97.h"

static struct snd_soc_machine tosa;

#define TOSA_HP        0
#define TOSA_MIC_INT   1
#define TOSA_HEADSET   2
#define TOSA_HP_OFF    3
#define TOSA_SPK_ON    0
#define TOSA_SPK_OFF   1

static int tosa_jack_func;
static int tosa_spk_func;

static void tosa_ext_control(struct snd_soc_codec *codec)
{
      /* set up jack connection */
      switch (tosa_jack_func) {
      case TOSA_HP:
            snd_soc_dapm_disable_pin(codec, "Mic (Internal)");
            snd_soc_dapm_enable_pin(codec, "Headphone Jack");
            snd_soc_dapm_disable_pin(codec, "Headset Jack");
            break;
      case TOSA_MIC_INT:
            snd_soc_dapm_enable_pin(codec, "Mic (Internal)");
            snd_soc_dapm_disable_pin(codec, "Headphone Jack");
            snd_soc_dapm_disable_pin(codec, "Headset Jack");
            break;
      case TOSA_HEADSET:
            snd_soc_dapm_disable_pin(codec, "Mic (Internal)");
            snd_soc_dapm_disable_pin(codec, "Headphone Jack");
            snd_soc_dapm_enable_pin(codec, "Headset Jack");
            break;
      }

      if (tosa_spk_func == TOSA_SPK_ON)
            snd_soc_dapm_enable_pin(codec, "Speaker");
      else
            snd_soc_dapm_disable_pin(codec, "Speaker");

      snd_soc_dapm_sync(codec);
}

static int tosa_startup(struct snd_pcm_substream *substream)
{
      struct snd_soc_pcm_runtime *rtd = substream->private_data;
      struct snd_soc_codec *codec = rtd->socdev->codec;

      /* check the jack status at stream startup */
      tosa_ext_control(codec);
      return 0;
}

static struct snd_soc_ops tosa_ops = {
      .startup = tosa_startup,
};

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

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

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

      tosa_jack_func = ucontrol->value.integer.value[0];
      tosa_ext_control(codec);
      return 1;
}

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

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

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

      tosa_spk_func = ucontrol->value.integer.value[0];
      tosa_ext_control(codec);
      return 1;
}

/* tosa dapm event handlers */
static int tosa_hp_event(struct snd_soc_dapm_widget *w,
      struct snd_kcontrol *k, int event)
{
      if (SND_SOC_DAPM_EVENT_ON(event))
            set_tc6393_gpio(&tc6393_device.dev,TOSA_TC6393_L_MUTE);
      else
            reset_tc6393_gpio(&tc6393_device.dev,TOSA_TC6393_L_MUTE);
      return 0;
}

/* tosa machine dapm widgets */
static const struct snd_soc_dapm_widget tosa_dapm_widgets[] = {
SND_SOC_DAPM_HP("Headphone Jack", tosa_hp_event),
SND_SOC_DAPM_HP("Headset Jack", NULL),
SND_SOC_DAPM_MIC("Mic (Internal)", NULL),
SND_SOC_DAPM_SPK("Speaker", NULL),
};

/* tosa audio map */
static const struct snd_soc_dapm_route audio_map[] = {

      /* headphone connected to HPOUTL, HPOUTR */
      {"Headphone Jack", NULL, "HPOUTL"},
      {"Headphone Jack", NULL, "HPOUTR"},

      /* ext speaker connected to LOUT2, ROUT2 */
      {"Speaker", NULL, "LOUT2"},
      {"Speaker", NULL, "ROUT2"},

      /* internal mic is connected to mic1, mic2 differential - with bias */
      {"MIC1", NULL, "Mic Bias"},
      {"MIC2", NULL, "Mic Bias"},
      {"Mic Bias", NULL, "Mic (Internal)"},

      /* headset is connected to HPOUTR, and LINEINR with bias */
      {"Headset Jack", NULL, "HPOUTR"},
      {"LINEINR", NULL, "Mic Bias"},
      {"Mic Bias", NULL, "Headset Jack"},
};

static const char *jack_function[] = {"Headphone", "Mic", "Line", "Headset",
      "Off"};
static const char *spk_function[] = {"On", "Off"};
static const struct soc_enum tosa_enum[] = {
      SOC_ENUM_SINGLE_EXT(5, jack_function),
      SOC_ENUM_SINGLE_EXT(2, spk_function),
};

static const struct snd_kcontrol_new tosa_controls[] = {
      SOC_ENUM_EXT("Jack Function", tosa_enum[0], tosa_get_jack,
            tosa_set_jack),
      SOC_ENUM_EXT("Speaker Function", tosa_enum[1], tosa_get_spk,
            tosa_set_spk),
};

static int tosa_ac97_init(struct snd_soc_codec *codec)
{
      int i, err;

      snd_soc_dapm_disable_pin(codec, "OUT3");
      snd_soc_dapm_disable_pin(codec, "MONOOUT");

      /* add tosa specific controls */
      for (i = 0; i < ARRAY_SIZE(tosa_controls); i++) {
            err = snd_ctl_add(codec->card,
                        snd_soc_cnew(&tosa_controls[i],codec, NULL));
            if (err < 0)
                  return err;
      }

      /* add tosa specific widgets */
      snd_soc_dapm_new_controls(codec, tosa_dapm_widgets,
                          ARRAY_SIZE(tosa_dapm_widgets));

      /* set up tosa specific audio path audio_map */
      snd_soc_dapm_add_routes(codec, audio_map, ARRAY_SIZE(audio_map));

      snd_soc_dapm_sync(codec);
      return 0;
}

static struct snd_soc_dai_link tosa_dai[] = {
{
      .name = "AC97",
      .stream_name = "AC97 HiFi",
      .cpu_dai = &pxa_ac97_dai[PXA2XX_DAI_AC97_HIFI],
      .codec_dai = &wm9712_dai[WM9712_DAI_AC97_HIFI],
      .init = tosa_ac97_init,
      .ops = &tosa_ops,
},
{
      .name = "AC97 Aux",
      .stream_name = "AC97 Aux",
      .cpu_dai = &pxa_ac97_dai[PXA2XX_DAI_AC97_AUX],
      .codec_dai = &wm9712_dai[WM9712_DAI_AC97_AUX],
      .ops = &tosa_ops,
},
};

static struct snd_soc_machine tosa = {
      .name = "Tosa",
      .dai_link = tosa_dai,
      .num_links = ARRAY_SIZE(tosa_dai),
};

static struct snd_soc_device tosa_snd_devdata = {
      .machine = &tosa,
      .platform = &pxa2xx_soc_platform,
      .codec_dev = &soc_codec_dev_wm9712,
};

static struct platform_device *tosa_snd_device;

static int __init tosa_init(void)
{
      int ret;

      if (!machine_is_tosa())
            return -ENODEV;

      tosa_snd_device = platform_device_alloc("soc-audio", -1);
      if (!tosa_snd_device)
            return -ENOMEM;

      platform_set_drvdata(tosa_snd_device, &tosa_snd_devdata);
      tosa_snd_devdata.dev = &tosa_snd_device->dev;
      ret = platform_device_add(tosa_snd_device);

      if (ret)
            platform_device_put(tosa_snd_device);

      return ret;
}

static void __exit tosa_exit(void)
{
      platform_device_unregister(tosa_snd_device);
}

module_init(tosa_init);
module_exit(tosa_exit);

/* Module information */
MODULE_AUTHOR("Richard Purdie");
MODULE_DESCRIPTION("ALSA SoC Tosa");
MODULE_LICENSE("GPL");

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