/*
   * mx27vis-aic32x4.c
   *
   * Copyright 2011 Vista Silicon S.L.
   *
   * Author: Javier Martin <javier.martin@vista-silicon.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.
   *
   * This program is distributed in the hope that it will be useful,
   * but WITHOUT ANY WARRANTY; without even the implied warranty of
   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   * GNU General Public License for more details.
   *
   * You should have received a copy of the GNU General Public License
   * along with this program; if not, write to the Free Software
   * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
   * MA 02110-1301, USA.
   */
  
  #include <linux/module.h>
  #include <linux/moduleparam.h>
  #include <linux/device.h>
  #include <linux/i2c.h>
  #include <linux/gpio.h>
  #include <linux/platform_data/asoc-mx27vis.h>
  #include <sound/core.h>
  #include <sound/pcm.h>
  #include <sound/soc.h>
  #include <sound/soc-dapm.h>
  #include <sound/tlv.h>
  #include <asm/mach-types.h>
  
  #include "../codecs/tlv320aic32x4.h"
  #include "imx-ssi.h"
  #include "imx-audmux.h"
  
  #define MX27VIS_AMP_GAIN	0
  #define MX27VIS_AMP_MUTE	1
  
  static int mx27vis_amp_gain;
  static int mx27vis_amp_mute;
  static int mx27vis_amp_gain0_gpio;
  static int mx27vis_amp_gain1_gpio;
  static int mx27vis_amp_mutel_gpio;
  static int mx27vis_amp_muter_gpio;
  
  static int mx27vis_aic32x4_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;
  	int ret;
  	u32 dai_format;
  
  	dai_format = SND_SOC_DAIFMT_DSP_B | SND_SOC_DAIFMT_NB_NF |
  		SND_SOC_DAIFMT_CBM_CFM;
  
  	/* set codec DAI configuration */
  	snd_soc_dai_set_fmt(codec_dai, dai_format);
  
  	/* set cpu DAI configuration */
  	snd_soc_dai_set_fmt(cpu_dai, dai_format);
  
  	ret = snd_soc_dai_set_sysclk(codec_dai, 0,
  				     25000000, SND_SOC_CLOCK_OUT);
  	if (ret) {
  		pr_err("%s: failed setting codec sysclk
  ", __func__);
  		return ret;
  	}
  
  	ret = snd_soc_dai_set_sysclk(cpu_dai, IMX_SSP_SYS_CLK, 0,
  				SND_SOC_CLOCK_IN);
  	if (ret) {
  		pr_err("can't set CPU system clock IMX_SSP_SYS_CLK
  ");
  		return ret;
  	}
  
  	return 0;
  }
  
  static struct snd_soc_ops mx27vis_aic32x4_snd_ops = {
  	.hw_params	= mx27vis_aic32x4_hw_params,
  };
  
  static int mx27vis_amp_set(struct snd_kcontrol *kcontrol,
  			    struct snd_ctl_elem_value *ucontrol)
  {
  	struct soc_mixer_control *mc =
  		(struct soc_mixer_control *)kcontrol->private_value;
  	int value = ucontrol->value.integer.value[0];
  	unsigned int reg = mc->reg;
  	int max = mc->max;
  
  	if (value > max)
  		return -EINVAL;
  
  	switch (reg) {
  	case MX27VIS_AMP_GAIN:
  		gpio_set_value(mx27vis_amp_gain0_gpio, value & 1);
  		gpio_set_value(mx27vis_amp_gain1_gpio, value >> 1);
  		mx27vis_amp_gain = value;
  		break;
  	case MX27VIS_AMP_MUTE:
  		gpio_set_value(mx27vis_amp_mutel_gpio, value & 1);
  		gpio_set_value(mx27vis_amp_muter_gpio, value >> 1);
  		mx27vis_amp_mute = value;
  		break;
  	}
  	return 0;
  }
  
  static int mx27vis_amp_get(struct snd_kcontrol *kcontrol,
  			    struct snd_ctl_elem_value *ucontrol)
  {
  	struct soc_mixer_control *mc =
  		(struct soc_mixer_control *)kcontrol->private_value;
  	unsigned int reg = mc->reg;
  
  	switch (reg) {
  	case MX27VIS_AMP_GAIN:
  		ucontrol->value.integer.value[0] = mx27vis_amp_gain;
  		break;
  	case MX27VIS_AMP_MUTE:
  		ucontrol->value.integer.value[0] = mx27vis_amp_mute;
  		break;
  	}
  	return 0;
  }
  
  /* From 6dB to 24dB in steps of 6dB */
  static const DECLARE_TLV_DB_SCALE(mx27vis_amp_tlv, 600, 600, 0);
  
  static const struct snd_kcontrol_new mx27vis_aic32x4_controls[] = {
  	SOC_DAPM_PIN_SWITCH("External Mic"),
  	SOC_SINGLE_EXT_TLV("LO Ext Boost", MX27VIS_AMP_GAIN, 0, 3, 0,
  		       mx27vis_amp_get, mx27vis_amp_set, mx27vis_amp_tlv),
  	SOC_DOUBLE_EXT("LO Ext Mute Switch", MX27VIS_AMP_MUTE, 0, 1, 1, 0,
  		       mx27vis_amp_get, mx27vis_amp_set),
  };
  
  static const struct snd_soc_dapm_widget aic32x4_dapm_widgets[] = {
  	SND_SOC_DAPM_MIC("External Mic", NULL),
  };
  
  static const struct snd_soc_dapm_route aic32x4_dapm_routes[] = {
  	{"Mic Bias", NULL, "External Mic"},
  	{"IN1_R", NULL, "Mic Bias"},
  	{"IN2_R", NULL, "Mic Bias"},
  	{"IN3_R", NULL, "Mic Bias"},
  	{"IN1_L", NULL, "Mic Bias"},
  	{"IN2_L", NULL, "Mic Bias"},
  	{"IN3_L", NULL, "Mic Bias"},
  };
  
  static struct snd_soc_dai_link mx27vis_aic32x4_dai = {
  	.name		= "tlv320aic32x4",
  	.stream_name	= "TLV320AIC32X4",
  	.codec_dai_name	= "tlv320aic32x4-hifi",
  	.platform_name	= "imx-ssi.0",
  	.codec_name	= "tlv320aic32x4.0-0018",
  	.cpu_dai_name	= "imx-ssi.0",
  	.ops		= &mx27vis_aic32x4_snd_ops,
  };
  
  static struct snd_soc_card mx27vis_aic32x4 = {
  	.name		= "visstrim_m10-audio",
  	.owner		= THIS_MODULE,
  	.dai_link	= &mx27vis_aic32x4_dai,
  	.num_links	= 1,
  	.controls	= mx27vis_aic32x4_controls,
  	.num_controls	= ARRAY_SIZE(mx27vis_aic32x4_controls),
  	.dapm_widgets	= aic32x4_dapm_widgets,
  	.num_dapm_widgets = ARRAY_SIZE(aic32x4_dapm_widgets),
  	.dapm_routes	= aic32x4_dapm_routes,
  	.num_dapm_routes = ARRAY_SIZE(aic32x4_dapm_routes),
  };
  
  static int mx27vis_aic32x4_probe(struct platform_device *pdev)
  {
  	struct snd_mx27vis_platform_data *pdata = pdev->dev.platform_data;
  	int ret;
  
  	if (!pdata) {
  		dev_err(&pdev->dev, "No platform data supplied
  ");
  		return -EINVAL;
  	}
  
  	mx27vis_amp_gain0_gpio = pdata->amp_gain0_gpio;
  	mx27vis_amp_gain1_gpio = pdata->amp_gain1_gpio;
  	mx27vis_amp_mutel_gpio = pdata->amp_mutel_gpio;
  	mx27vis_amp_muter_gpio = pdata->amp_muter_gpio;
  
  	mx27vis_aic32x4.dev = &pdev->dev;
  	ret = snd_soc_register_card(&mx27vis_aic32x4);
  	if (ret) {
  		dev_err(&pdev->dev, "snd_soc_register_card failed (%d)
  ",
  			ret);
  		return ret;
  	}
  
  	/* Connect SSI0 as clock slave to SSI1 external pins */
  	imx_audmux_v1_configure_port(MX27_AUDMUX_HPCR1_SSI0,
  			IMX_AUDMUX_V1_PCR_SYN |
  			IMX_AUDMUX_V1_PCR_TFSDIR |
  			IMX_AUDMUX_V1_PCR_TCLKDIR |
  			IMX_AUDMUX_V1_PCR_TFCSEL(MX27_AUDMUX_PPCR1_SSI_PINS_1) |
  			IMX_AUDMUX_V1_PCR_RXDSEL(MX27_AUDMUX_PPCR1_SSI_PINS_1)
  	);
  	imx_audmux_v1_configure_port(MX27_AUDMUX_PPCR1_SSI_PINS_1,
  			IMX_AUDMUX_V1_PCR_SYN |
  			IMX_AUDMUX_V1_PCR_RXDSEL(MX27_AUDMUX_HPCR1_SSI0)
  	);
  
  	return ret;
  }
  
  static int mx27vis_aic32x4_remove(struct platform_device *pdev)
  {
  	snd_soc_unregister_card(&mx27vis_aic32x4);
  
  	return 0;
  }
  
  static struct platform_driver mx27vis_aic32x4_audio_driver = {
  	.driver = {
  		.name = "mx27vis",
  		.owner = THIS_MODULE,
  	},
  	.probe = mx27vis_aic32x4_probe,
  	.remove = mx27vis_aic32x4_remove,
  };
  
  module_platform_driver(mx27vis_aic32x4_audio_driver);
  
  MODULE_AUTHOR("Javier Martin <javier.martin@vista-silicon.com>");
  MODULE_DESCRIPTION("ALSA SoC AIC32X4 mx27 visstrim");
  MODULE_LICENSE("GPL");
  MODULE_ALIAS("platform:mx27vis");