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e740_wm9705.c

/*
 * e740-wm9705.c  --  SoC audio for e740
 *
 * 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 <mach/audio.h>
#include <mach/eseries-gpio.h>

#include <asm/mach-types.h>

#include "../codecs/wm9705.h"
#include "pxa2xx-pcm.h"
#include "pxa2xx-ac97.h"


#define E740_AUDIO_OUT 1
#define E740_AUDIO_IN  2

static int e740_audio_power;

static void e740_sync_audio_power(int status)
{
      gpio_set_value(GPIO_E740_WM9705_nAVDD2, !status);
      gpio_set_value(GPIO_E740_AMP_ON, (status & E740_AUDIO_OUT) ? 1 : 0);
      gpio_set_value(GPIO_E740_MIC_ON, (status & E740_AUDIO_IN) ? 1 : 0);
}

static int e740_mic_amp_event(struct snd_soc_dapm_widget *w,
                        struct snd_kcontrol *kcontrol, int event)
{
      if (event & SND_SOC_DAPM_PRE_PMU)
            e740_audio_power |= E740_AUDIO_IN;
      else if (event & SND_SOC_DAPM_POST_PMD)
            e740_audio_power &= ~E740_AUDIO_IN;

      e740_sync_audio_power(e740_audio_power);

      return 0;
}

static int e740_output_amp_event(struct snd_soc_dapm_widget *w,
                        struct snd_kcontrol *kcontrol, int event)
{
      if (event & SND_SOC_DAPM_PRE_PMU)
            e740_audio_power |= E740_AUDIO_OUT;
      else if (event & SND_SOC_DAPM_POST_PMD)
            e740_audio_power &= ~E740_AUDIO_OUT;

      e740_sync_audio_power(e740_audio_power);

      return 0;
}

static const struct snd_soc_dapm_widget e740_dapm_widgets[] = {
      SND_SOC_DAPM_HP("Headphone Jack", NULL),
      SND_SOC_DAPM_SPK("Speaker", NULL),
      SND_SOC_DAPM_MIC("Mic (Internal)", NULL),
      SND_SOC_DAPM_PGA_E("Output Amp", SND_SOC_NOPM, 0, 0, NULL, 0,
                  e740_output_amp_event, SND_SOC_DAPM_PRE_PMU |
                  SND_SOC_DAPM_POST_PMD),
      SND_SOC_DAPM_PGA_E("Mic Amp", SND_SOC_NOPM, 0, 0, NULL, 0,
                  e740_mic_amp_event, SND_SOC_DAPM_PRE_PMU |
                  SND_SOC_DAPM_POST_PMD),
};

static const struct snd_soc_dapm_route audio_map[] = {
      {"Output Amp", NULL, "LOUT"},
      {"Output Amp", NULL, "ROUT"},
      {"Output Amp", NULL, "MONOOUT"},

      {"Speaker", NULL, "Output Amp"},
      {"Headphone Jack", NULL, "Output Amp"},

      {"MIC1", NULL, "Mic Amp"},
      {"Mic Amp", NULL, "Mic (Internal)"},
};

static int e740_ac97_init(struct snd_soc_codec *codec)
{
      snd_soc_dapm_nc_pin(codec, "HPOUTL");
      snd_soc_dapm_nc_pin(codec, "HPOUTR");
      snd_soc_dapm_nc_pin(codec, "PHONE");
      snd_soc_dapm_nc_pin(codec, "LINEINL");
      snd_soc_dapm_nc_pin(codec, "LINEINR");
      snd_soc_dapm_nc_pin(codec, "CDINL");
      snd_soc_dapm_nc_pin(codec, "CDINR");
      snd_soc_dapm_nc_pin(codec, "PCBEEP");
      snd_soc_dapm_nc_pin(codec, "MIC2");

      snd_soc_dapm_new_controls(codec, e740_dapm_widgets,
                              ARRAY_SIZE(e740_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 e740_dai[] = {
      {
            .name = "AC97",
            .stream_name = "AC97 HiFi",
            .cpu_dai = &pxa_ac97_dai[PXA2XX_DAI_AC97_HIFI],
            .codec_dai = &wm9705_dai[WM9705_DAI_AC97_HIFI],
            .init = e740_ac97_init,
      },
      {
            .name = "AC97 Aux",
            .stream_name = "AC97 Aux",
            .cpu_dai = &pxa_ac97_dai[PXA2XX_DAI_AC97_AUX],
            .codec_dai = &wm9705_dai[WM9705_DAI_AC97_AUX],
      },
};

static struct snd_soc_card e740 = {
      .name = "Toshiba e740",
      .platform = &pxa2xx_soc_platform,
      .dai_link = e740_dai,
      .num_links = ARRAY_SIZE(e740_dai),
};

static struct snd_soc_device e740_snd_devdata = {
      .card = &e740,
      .codec_dev = &soc_codec_dev_wm9705,
};

static struct platform_device *e740_snd_device;

static int __init e740_init(void)
{
      int ret;

      if (!machine_is_e740())
            return -ENODEV;

      ret = gpio_request(GPIO_E740_MIC_ON,  "Mic amp");
      if (ret)
            return ret;

      ret = gpio_request(GPIO_E740_AMP_ON, "Output amp");
      if (ret)
            goto free_mic_amp_gpio;

      ret = gpio_request(GPIO_E740_WM9705_nAVDD2, "Audio power");
      if (ret)
            goto free_op_amp_gpio;

      /* Disable audio */
      ret = gpio_direction_output(GPIO_E740_MIC_ON, 0);
      if (ret)
            goto free_apwr_gpio;
      ret = gpio_direction_output(GPIO_E740_AMP_ON, 0);
      if (ret)
            goto free_apwr_gpio;
      ret = gpio_direction_output(GPIO_E740_WM9705_nAVDD2, 1);
      if (ret)
            goto free_apwr_gpio;

      e740_snd_device = platform_device_alloc("soc-audio", -1);
      if (!e740_snd_device) {
            ret = -ENOMEM;
            goto free_apwr_gpio;
      }

      platform_set_drvdata(e740_snd_device, &e740_snd_devdata);
      e740_snd_devdata.dev = &e740_snd_device->dev;
      ret = platform_device_add(e740_snd_device);

      if (!ret)
            return 0;

/* Fail gracefully */
      platform_device_put(e740_snd_device);
free_apwr_gpio:
      gpio_free(GPIO_E740_WM9705_nAVDD2);
free_op_amp_gpio:
      gpio_free(GPIO_E740_AMP_ON);
free_mic_amp_gpio:
      gpio_free(GPIO_E740_MIC_ON);

      return ret;
}

static void __exit e740_exit(void)
{
      platform_device_unregister(e740_snd_device);
}

module_init(e740_init);
module_exit(e740_exit);

/* Module information */
MODULE_AUTHOR("Ian Molton <spyro@f2s.com>");
MODULE_DESCRIPTION("ALSA SoC driver for e740");
MODULE_LICENSE("GPL v2");

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