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smartq_wm8987.c

/* sound/soc/samsung/smartq_wm8987.c
 *
 * Copyright 2010 Maurus Cuelenaere <mcuelenaere@gmail.com>
 *
 * Based on smdk6410_wm8987.c
 *     Copyright 2007 Wolfson Microelectronics PLC. - linux@wolfsonmicro.com
 *     Graeme Gregory - graeme.gregory@wolfsonmicro.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.
 *
 */

#include <linux/gpio.h>

#include <sound/soc.h>
#include <sound/jack.h>

#include <asm/mach-types.h>

#include "i2s.h"
#include "../codecs/wm8750.h"

/*
 * WM8987 is register compatible with WM8750, so using that as base driver.
 */

static struct snd_soc_card snd_soc_smartq;

static int smartq_hifi_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;
      unsigned int clk = 0;
      int ret;

      switch (params_rate(params)) {
      case 8000:
      case 16000:
      case 32000:
      case 48000:
      case 96000:
            clk = 12288000;
            break;
      case 11025:
      case 22050:
      case 44100:
      case 88200:
            clk = 11289600;
            break;
      }

      /* set codec DAI configuration */
      ret = snd_soc_dai_set_fmt(codec_dai, SND_SOC_DAIFMT_I2S |
                                   SND_SOC_DAIFMT_NB_NF |
                                   SND_SOC_DAIFMT_CBS_CFS);
      if (ret < 0)
            return ret;

      /* set cpu DAI configuration */
      ret = snd_soc_dai_set_fmt(cpu_dai, SND_SOC_DAIFMT_I2S |
                                 SND_SOC_DAIFMT_NB_NF |
                                 SND_SOC_DAIFMT_CBS_CFS);
      if (ret < 0)
            return ret;

      /* Use PCLK for I2S signal generation */
      ret = snd_soc_dai_set_sysclk(cpu_dai, SAMSUNG_I2S_RCLKSRC_0,
                              0, SND_SOC_CLOCK_IN);
      if (ret < 0)
            return ret;

      /* Gate the RCLK output on PAD */
      ret = snd_soc_dai_set_sysclk(cpu_dai, SAMSUNG_I2S_CDCLK,
                              0, SND_SOC_CLOCK_IN);
      if (ret < 0)
            return ret;

      /* set the codec system clock for DAC and ADC */
      ret = snd_soc_dai_set_sysclk(codec_dai, WM8750_SYSCLK, clk,
                             SND_SOC_CLOCK_IN);
      if (ret < 0)
            return ret;

      return 0;
}

/*
 * SmartQ WM8987 HiFi DAI operations.
 */
static struct snd_soc_ops smartq_hifi_ops = {
      .hw_params = smartq_hifi_hw_params,
};

static struct snd_soc_jack smartq_jack;

static struct snd_soc_jack_pin smartq_jack_pins[] = {
      /* Disable speaker when headphone is plugged in */
      {
            .pin  = "Internal Speaker",
            .mask = SND_JACK_HEADPHONE,
      },
};

static struct snd_soc_jack_gpio smartq_jack_gpios[] = {
      {
            .gpio       = S3C64XX_GPL(12),
            .name       = "headphone detect",
            .report           = SND_JACK_HEADPHONE,
            .debounce_time    = 200,
      },
};

static const struct snd_kcontrol_new wm8987_smartq_controls[] = {
      SOC_DAPM_PIN_SWITCH("Internal Speaker"),
      SOC_DAPM_PIN_SWITCH("Headphone Jack"),
      SOC_DAPM_PIN_SWITCH("Internal Mic"),
};

static int smartq_speaker_event(struct snd_soc_dapm_widget *w,
                        struct snd_kcontrol *k,
                        int event)
{
      gpio_set_value(S3C64XX_GPK(12), SND_SOC_DAPM_EVENT_OFF(event));

      return 0;
}

static const struct snd_soc_dapm_widget wm8987_dapm_widgets[] = {
      SND_SOC_DAPM_SPK("Internal Speaker", smartq_speaker_event),
      SND_SOC_DAPM_HP("Headphone Jack", NULL),
      SND_SOC_DAPM_MIC("Internal Mic", NULL),
};

static const struct snd_soc_dapm_route audio_map[] = {
      {"Headphone Jack", NULL, "LOUT2"},
      {"Headphone Jack", NULL, "ROUT2"},

      {"Internal Speaker", NULL, "LOUT2"},
      {"Internal Speaker", NULL, "ROUT2"},

      {"Mic Bias", NULL, "Internal Mic"},
      {"LINPUT2", NULL, "Mic Bias"},
};

static int smartq_wm8987_init(struct snd_soc_pcm_runtime *rtd)
{
      struct snd_soc_codec *codec = rtd->codec;
      struct snd_soc_dapm_context *dapm = &codec->dapm;
      int err = 0;

      /* Add SmartQ specific widgets */
      snd_soc_dapm_new_controls(dapm, wm8987_dapm_widgets,
                          ARRAY_SIZE(wm8987_dapm_widgets));

      /* add SmartQ specific controls */
      err = snd_soc_add_controls(codec, wm8987_smartq_controls,
                           ARRAY_SIZE(wm8987_smartq_controls));

      if (err < 0)
            return err;

      /* setup SmartQ specific audio path */
      snd_soc_dapm_add_routes(dapm, audio_map, ARRAY_SIZE(audio_map));

      /* set endpoints to not connected */
      snd_soc_dapm_nc_pin(dapm, "LINPUT1");
      snd_soc_dapm_nc_pin(dapm, "RINPUT1");
      snd_soc_dapm_nc_pin(dapm, "OUT3");
      snd_soc_dapm_nc_pin(dapm, "ROUT1");

      /* set endpoints to default off mode */
      snd_soc_dapm_enable_pin(dapm, "Internal Speaker");
      snd_soc_dapm_enable_pin(dapm, "Internal Mic");
      snd_soc_dapm_disable_pin(dapm, "Headphone Jack");

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

      /* Headphone jack detection */
      err = snd_soc_jack_new(codec, "Headphone Jack",
                         SND_JACK_HEADPHONE, &smartq_jack);
      if (err)
            return err;

      err = snd_soc_jack_add_pins(&smartq_jack, ARRAY_SIZE(smartq_jack_pins),
                            smartq_jack_pins);
      if (err)
            return err;

      err = snd_soc_jack_add_gpios(&smartq_jack,
                             ARRAY_SIZE(smartq_jack_gpios),
                             smartq_jack_gpios);

      return err;
}

static struct snd_soc_dai_link smartq_dai[] = {
      {
            .name       = "wm8987",
            .stream_name      = "SmartQ Hi-Fi",
            .cpu_dai_name     = "samsung-i2s.0",
            .codec_dai_name   = "wm8750-hifi",
            .platform_name    = "samsung-audio",
            .codec_name = "wm8750-codec.0-0x1a",
            .init       = smartq_wm8987_init,
            .ops        = &smartq_hifi_ops,
      },
};

static struct snd_soc_card snd_soc_smartq = {
      .name = "SmartQ",
      .dai_link = smartq_dai,
      .num_links = ARRAY_SIZE(smartq_dai),
};

static struct platform_device *smartq_snd_device;

static int __init smartq_init(void)
{
      int ret;

      if (!machine_is_smartq7() && !machine_is_smartq5()) {
            pr_info("Only SmartQ is supported by this ASoC driver\n");
            return -ENODEV;
      }

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

      platform_set_drvdata(smartq_snd_device, &snd_soc_smartq);

      ret = platform_device_add(smartq_snd_device);
      if (ret) {
            platform_device_put(smartq_snd_device);
            return ret;
      }

      /* Initialise GPIOs used by amplifiers */
      ret = gpio_request(S3C64XX_GPK(12), "amplifiers shutdown");
      if (ret) {
            dev_err(&smartq_snd_device->dev, "Failed to register GPK12\n");
            goto err_unregister_device;
      }

      /* Disable amplifiers */
      ret = gpio_direction_output(S3C64XX_GPK(12), 1);
      if (ret) {
            dev_err(&smartq_snd_device->dev, "Failed to configure GPK12\n");
            goto err_free_gpio_amp_shut;
      }

      return 0;

err_free_gpio_amp_shut:
      gpio_free(S3C64XX_GPK(12));
err_unregister_device:
      platform_device_unregister(smartq_snd_device);

      return ret;
}

static void __exit smartq_exit(void)
{
      gpio_free(S3C64XX_GPK(12));
      snd_soc_jack_free_gpios(&smartq_jack, ARRAY_SIZE(smartq_jack_gpios),
                        smartq_jack_gpios);

      platform_device_unregister(smartq_snd_device);
}

module_init(smartq_init);
module_exit(smartq_exit);

/* Module information */
MODULE_AUTHOR("Maurus Cuelenaere <mcuelenaere@gmail.com>");
MODULE_DESCRIPTION("ALSA SoC SmartQ WM8987");
MODULE_LICENSE("GPL");

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