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e800_wm9712.c

/*
 * e800-wm9712.c  --  SoC audio for e800
 *
 * Copyright 2007 (c) Ian Molton <spyro@f2s.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; version 2 ONLY.
 *
 */

#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/gpio.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/audio.h>
#include <mach/eseries-gpio.h>

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

static int e800_spk_amp_event(struct snd_soc_dapm_widget *w,
                        struct snd_kcontrol *kcontrol, int event)
{
      if (event & SND_SOC_DAPM_PRE_PMU)
            gpio_set_value(GPIO_E800_SPK_AMP_ON, 1);
      else if (event & SND_SOC_DAPM_POST_PMD)
            gpio_set_value(GPIO_E800_SPK_AMP_ON, 0);

      return 0;
}

static int e800_hp_amp_event(struct snd_soc_dapm_widget *w,
                        struct snd_kcontrol *kcontrol, int event)
{
      if (event & SND_SOC_DAPM_PRE_PMU)
            gpio_set_value(GPIO_E800_HP_AMP_OFF, 0);
      else if (event & SND_SOC_DAPM_POST_PMD)
            gpio_set_value(GPIO_E800_HP_AMP_OFF, 1);

      return 0;
}

static const struct snd_soc_dapm_widget e800_dapm_widgets[] = {
      SND_SOC_DAPM_HP("Headphone Jack", NULL),
      SND_SOC_DAPM_MIC("Mic (Internal1)", NULL),
      SND_SOC_DAPM_MIC("Mic (Internal2)", NULL),
      SND_SOC_DAPM_SPK("Speaker", NULL),
      SND_SOC_DAPM_PGA_E("Headphone Amp", SND_SOC_NOPM, 0, 0, NULL, 0,
                  e800_hp_amp_event, SND_SOC_DAPM_PRE_PMU |
                  SND_SOC_DAPM_POST_PMD),
      SND_SOC_DAPM_PGA_E("Speaker Amp", SND_SOC_NOPM, 0, 0, NULL, 0,
                  e800_spk_amp_event, SND_SOC_DAPM_PRE_PMU |
                  SND_SOC_DAPM_POST_PMD),
};

static const struct snd_soc_dapm_route audio_map[] = {
      {"Headphone Jack", NULL, "HPOUTL"},
      {"Headphone Jack", NULL, "HPOUTR"},
      {"Headphone Jack", NULL, "Headphone Amp"},

      {"Speaker Amp", NULL, "MONOOUT"},
      {"Speaker", NULL, "Speaker Amp"},

      {"MIC1", NULL, "Mic (Internal1)"},
      {"MIC2", NULL, "Mic (Internal2)"},
};

static int e800_ac97_init(struct snd_soc_codec *codec)
{
      snd_soc_dapm_new_controls(codec, e800_dapm_widgets,
                              ARRAY_SIZE(e800_dapm_widgets));

      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 e800_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 = e800_ac97_init,
      },
      {
            .name = "AC97 Aux",
            .stream_name = "AC97 Aux",
            .cpu_dai = &pxa_ac97_dai[PXA2XX_DAI_AC97_AUX],
            .codec_dai = &wm9712_dai[WM9712_DAI_AC97_AUX],
      },
};

static struct snd_soc_card e800 = {
      .name = "Toshiba e800",
      .platform = &pxa2xx_soc_platform,
      .dai_link = e800_dai,
      .num_links = ARRAY_SIZE(e800_dai),
};

static struct snd_soc_device e800_snd_devdata = {
      .card = &e800,
      .codec_dev = &soc_codec_dev_wm9712,
};

static struct platform_device *e800_snd_device;

static int __init e800_init(void)
{
      int ret;

      if (!machine_is_e800())
            return -ENODEV;

      ret = gpio_request(GPIO_E800_HP_AMP_OFF,  "Headphone amp");
      if (ret)
            return ret;

      ret = gpio_request(GPIO_E800_SPK_AMP_ON, "Speaker amp");
      if (ret)
            goto free_hp_amp_gpio;

      ret = gpio_direction_output(GPIO_E800_HP_AMP_OFF, 1);
      if (ret)
            goto free_spk_amp_gpio;

      ret = gpio_direction_output(GPIO_E800_SPK_AMP_ON, 1);
      if (ret)
            goto free_spk_amp_gpio;

      e800_snd_device = platform_device_alloc("soc-audio", -1);
      if (!e800_snd_device)
            return -ENOMEM;

      platform_set_drvdata(e800_snd_device, &e800_snd_devdata);
      e800_snd_devdata.dev = &e800_snd_device->dev;
      ret = platform_device_add(e800_snd_device);

      if (!ret)
            return 0;

/* Fail gracefully */
      platform_device_put(e800_snd_device);
free_spk_amp_gpio:
      gpio_free(GPIO_E800_SPK_AMP_ON);
free_hp_amp_gpio:
      gpio_free(GPIO_E800_HP_AMP_OFF);

      return ret;
}

static void __exit e800_exit(void)
{
      platform_device_unregister(e800_snd_device);
      gpio_free(GPIO_E800_SPK_AMP_ON);
      gpio_free(GPIO_E800_HP_AMP_OFF);
}

module_init(e800_init);
module_exit(e800_exit);

/* Module information */
MODULE_AUTHOR("Ian Molton <spyro@f2s.com>");
MODULE_DESCRIPTION("ALSA SoC driver for e800");
MODULE_LICENSE("GPL v2");

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