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spitz.c

/*
 * spitz.c  --  SoC audio for Sharp SL-Cxx00 models Spitz, Borzoi and Akita
 *
 * 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.
 *
 */

#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/timer.h>
#include <linux/interrupt.h>
#include <linux/platform_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/scoop.h>
#include <asm/arch/pxa-regs.h>
#include <asm/arch/hardware.h>
#include <asm/arch/akita.h>
#include <asm/arch/spitz.h>
#include "../codecs/wm8750.h"
#include "pxa2xx-pcm.h"
#include "pxa2xx-i2s.h"

#define SPITZ_HP        0
#define SPITZ_MIC       1
#define SPITZ_LINE      2
#define SPITZ_HEADSET   3
#define SPITZ_HP_OFF    4
#define SPITZ_SPK_ON    0
#define SPITZ_SPK_OFF   1

 /* audio clock in Hz - rounded from 12.235MHz */
#define SPITZ_AUDIO_CLOCK 12288000

static int spitz_jack_func;
static int spitz_spk_func;

static void spitz_ext_control(struct snd_soc_codec *codec)
{
      if (spitz_spk_func == SPITZ_SPK_ON)
            snd_soc_dapm_enable_pin(codec, "Ext Spk");
      else
            snd_soc_dapm_disable_pin(codec, "Ext Spk");

      /* set up jack connection */
      switch (spitz_jack_func) {
      case SPITZ_HP:
            /* enable and unmute hp jack, disable mic bias */
            snd_soc_dapm_disable_pin(codec, "Headset Jack");
            snd_soc_dapm_disable_pin(codec, "Mic Jack");
            snd_soc_dapm_disable_pin(codec, "Line Jack");
            snd_soc_dapm_enable_pin(codec, "Headphone Jack");
            set_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_MUTE_L);
            set_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_MUTE_R);
            break;
      case SPITZ_MIC:
            /* enable mic jack and bias, mute hp */
            snd_soc_dapm_disable_pin(codec, "Headphone Jack");
            snd_soc_dapm_disable_pin(codec, "Headset Jack");
            snd_soc_dapm_disable_pin(codec, "Line Jack");
            snd_soc_dapm_enable_pin(codec, "Mic Jack");
            reset_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_MUTE_L);
            reset_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_MUTE_R);
            break;
      case SPITZ_LINE:
            /* enable line jack, disable mic bias and mute hp */
            snd_soc_dapm_disable_pin(codec, "Headphone Jack");
            snd_soc_dapm_disable_pin(codec, "Headset Jack");
            snd_soc_dapm_disable_pin(codec, "Mic Jack");
            snd_soc_dapm_enable_pin(codec, "Line Jack");
            reset_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_MUTE_L);
            reset_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_MUTE_R);
            break;
      case SPITZ_HEADSET:
            /* enable and unmute headset jack enable mic bias, mute L hp */
            snd_soc_dapm_disable_pin(codec, "Headphone Jack");
            snd_soc_dapm_enable_pin(codec, "Mic Jack");
            snd_soc_dapm_disable_pin(codec, "Line Jack");
            snd_soc_dapm_enable_pin(codec, "Headset Jack");
            reset_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_MUTE_L);
            set_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_MUTE_R);
            break;
      case SPITZ_HP_OFF:

            /* jack removed, everything off */
            snd_soc_dapm_disable_pin(codec, "Headphone Jack");
            snd_soc_dapm_disable_pin(codec, "Headset Jack");
            snd_soc_dapm_disable_pin(codec, "Mic Jack");
            snd_soc_dapm_disable_pin(codec, "Line Jack");
            reset_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_MUTE_L);
            reset_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_MUTE_R);
            break;
      }
      snd_soc_dapm_sync(codec);
}

static int spitz_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 */
      spitz_ext_control(codec);
      return 0;
}

static int spitz_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->dai->codec_dai;
      struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai;
      unsigned int clk = 0;
      int ret = 0;

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

      /* 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;

      /* set the I2S system clock as input (unused) */
      ret = snd_soc_dai_set_sysclk(cpu_dai, PXA2XX_I2S_SYSCLK, 0,
            SND_SOC_CLOCK_IN);
      if (ret < 0)
            return ret;

      return 0;
}

static struct snd_soc_ops spitz_ops = {
      .startup = spitz_startup,
      .hw_params = spitz_hw_params,
};

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

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

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

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

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

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

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

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

static int spitz_mic_bias(struct snd_soc_dapm_widget *w,
      struct snd_kcontrol *k, int event)
{
      if (machine_is_borzoi() || machine_is_spitz()) {
            if (SND_SOC_DAPM_EVENT_ON(event))
                  set_scoop_gpio(&spitzscoop2_device.dev,
                        SPITZ_SCP2_MIC_BIAS);
            else
                  reset_scoop_gpio(&spitzscoop2_device.dev,
                        SPITZ_SCP2_MIC_BIAS);
      }

      if (machine_is_akita()) {
            if (SND_SOC_DAPM_EVENT_ON(event))
                  akita_set_ioexp(&akitaioexp_device.dev,
                        AKITA_IOEXP_MIC_BIAS);
            else
                  akita_reset_ioexp(&akitaioexp_device.dev,
                        AKITA_IOEXP_MIC_BIAS);
      }
      return 0;
}

/* spitz machine dapm widgets */
static const struct snd_soc_dapm_widget wm8750_dapm_widgets[] = {
      SND_SOC_DAPM_HP("Headphone Jack", NULL),
      SND_SOC_DAPM_MIC("Mic Jack", spitz_mic_bias),
      SND_SOC_DAPM_SPK("Ext Spk", NULL),
      SND_SOC_DAPM_LINE("Line Jack", NULL),

      /* headset is a mic and mono headphone */
      SND_SOC_DAPM_HP("Headset Jack", NULL),
};

/* Spitz machine audio_map */
static const struct snd_soc_dapm_route audio_map[] = {

      /* headphone connected to LOUT1, ROUT1 */
      {"Headphone Jack", NULL, "LOUT1"},
      {"Headphone Jack", NULL, "ROUT1"},

      /* headset connected to ROUT1 and LINPUT1 with bias (def below) */
      {"Headset Jack", NULL, "ROUT1"},

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

      /* mic is connected to input 1 - with bias */
      {"LINPUT1", NULL, "Mic Bias"},
      {"Mic Bias", NULL, "Mic Jack"},

      /* line is connected to input 1 - no bias */
      {"LINPUT1", NULL, "Line Jack"},
};

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

static const struct snd_kcontrol_new wm8750_spitz_controls[] = {
      SOC_ENUM_EXT("Jack Function", spitz_enum[0], spitz_get_jack,
            spitz_set_jack),
      SOC_ENUM_EXT("Speaker Function", spitz_enum[1], spitz_get_spk,
            spitz_set_spk),
};

/*
 * Logic for a wm8750 as connected on a Sharp SL-Cxx00 Device
 */
static int spitz_wm8750_init(struct snd_soc_codec *codec)
{
      int i, err;

      /* NC codec pins */
      snd_soc_dapm_disable_pin(codec, "RINPUT1");
      snd_soc_dapm_disable_pin(codec, "LINPUT2");
      snd_soc_dapm_disable_pin(codec, "RINPUT2");
      snd_soc_dapm_disable_pin(codec, "LINPUT3");
      snd_soc_dapm_disable_pin(codec, "RINPUT3");
      snd_soc_dapm_disable_pin(codec, "OUT3");
      snd_soc_dapm_disable_pin(codec, "MONO");

      /* Add spitz specific controls */
      for (i = 0; i < ARRAY_SIZE(wm8750_spitz_controls); i++) {
            err = snd_ctl_add(codec->card,
                  snd_soc_cnew(&wm8750_spitz_controls[i], codec, NULL));
            if (err < 0)
                  return err;
      }

      /* Add spitz specific widgets */
      snd_soc_dapm_new_controls(codec, wm8750_dapm_widgets,
                          ARRAY_SIZE(wm8750_dapm_widgets));

      /* Set up spitz specific audio paths */
      snd_soc_dapm_add_routes(codec, audio_map, ARRAY_SIZE(audio_map));

      snd_soc_dapm_sync(codec);
      return 0;
}

/* spitz digital audio interface glue - connects codec <--> CPU */
static struct snd_soc_dai_link spitz_dai = {
      .name = "wm8750",
      .stream_name = "WM8750",
      .cpu_dai = &pxa_i2s_dai,
      .codec_dai = &wm8750_dai,
      .init = spitz_wm8750_init,
      .ops = &spitz_ops,
};

/* spitz audio machine driver */
static struct snd_soc_machine snd_soc_machine_spitz = {
      .name = "Spitz",
      .dai_link = &spitz_dai,
      .num_links = 1,
};

/* spitz audio private data */
static struct wm8750_setup_data spitz_wm8750_setup = {
      .i2c_address = 0x1b,
};

/* spitz audio subsystem */
static struct snd_soc_device spitz_snd_devdata = {
      .machine = &snd_soc_machine_spitz,
      .platform = &pxa2xx_soc_platform,
      .codec_dev = &soc_codec_dev_wm8750,
      .codec_data = &spitz_wm8750_setup,
};

static struct platform_device *spitz_snd_device;

static int __init spitz_init(void)
{
      int ret;

      if (!(machine_is_spitz() || machine_is_borzoi() || machine_is_akita()))
            return -ENODEV;

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

      platform_set_drvdata(spitz_snd_device, &spitz_snd_devdata);
      spitz_snd_devdata.dev = &spitz_snd_device->dev;
      ret = platform_device_add(spitz_snd_device);

      if (ret)
            platform_device_put(spitz_snd_device);

      return ret;
}

static void __exit spitz_exit(void)
{
      platform_device_unregister(spitz_snd_device);
}

module_init(spitz_init);
module_exit(spitz_exit);

MODULE_AUTHOR("Richard Purdie");
MODULE_DESCRIPTION("ALSA SoC Spitz");
MODULE_LICENSE("GPL");

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