/*
 *  sn95031.c -  TI sn95031 Codec driver
 *
 *  Copyright (C) 2010 Intel Corp
 *  Author: Vinod Koul <vinod.koul@intel.com>
 *  Author: Harsha Priya <priya.harsha@intel.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 of the License.
 *
 *  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.,
 *  59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
 *
 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 *
 *
 */
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

#include <linux/platform_device.h>
#include <linux/delay.h>
#include <linux/slab.h>

#include <asm/intel_scu_ipc.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>
#include <sound/soc-dapm.h>
#include <sound/initval.h>
#include <sound/tlv.h>
#include <sound/jack.h>
#include "sn95031.h"

#define SN95031_RATES (SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_44100)
#define SN95031_FORMATS (SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S16_LE)

/* adc helper functions */

/* enables mic bias voltage */
static void sn95031_enable_mic_bias(struct snd_soc_codec *codec)
{
	snd_soc_write(codec, SN95031_VAUD, BIT(2)|BIT(1)|BIT(0));
	snd_soc_update_bits(codec, SN95031_MICBIAS, BIT(2), BIT(2));
}

/* Enable/Disable the ADC depending on the argument */
static void configure_adc(struct snd_soc_codec *sn95031_codec, int val)
{
	int value = snd_soc_read(sn95031_codec, SN95031_ADC1CNTL1);

	if (val) {
		/* Enable and start the ADC */
		value |= (SN95031_ADC_ENBL | SN95031_ADC_START);
		value &= (~SN95031_ADC_NO_LOOP);
	} else {
		/* Just stop the ADC */
		value &= (~SN95031_ADC_START);
	}
	snd_soc_write(sn95031_codec, SN95031_ADC1CNTL1, value);
}

/*
 * finds an empty channel for conversion
 * If the ADC is not enabled then start using 0th channel
 * itself. Otherwise find an empty channel by looking for a
 * channel in which the stopbit is set to 1. returns the index
 * of the first free channel if succeeds or an error code.
 *
 * Context: can sleep
 *
 */
static int find_free_channel(struct snd_soc_codec *sn95031_codec)
{
	int ret = 0, i, value;

	/* check whether ADC is enabled */
	value = snd_soc_read(sn95031_codec, SN95031_ADC1CNTL1);

	if ((value & SN95031_ADC_ENBL) == 0)
		return 0;

	/* ADC is already enabled; Looking for an empty channel */
	for (i = 0; i <	SN95031_ADC_CHANLS_MAX; i++) {
		value = snd_soc_read(sn95031_codec,
				SN95031_ADC_CHNL_START_ADDR + i);
		if (value & SN95031_STOPBIT_MASK) {
			ret = i;
			break;
		}
	}
	return (ret > SN95031_ADC_LOOP_MAX) ? (-EINVAL) : ret;
}

/* Initialize the ADC for reading micbias values. Can sleep. */
static int sn95031_initialize_adc(struct snd_soc_codec *sn95031_codec)
{
	int base_addr, chnl_addr;
	int value;
	static int channel_index;

	/* Index of the first channel in which the stop bit is set */
	channel_index = find_free_channel(sn95031_codec);
	if (channel_index < 0) {
		pr_err("No free ADC channels");
		return channel_index;
	}

	base_addr = SN95031_ADC_CHNL_START_ADDR + channel_index;

	if (!(channel_index == 0 || channel_index ==  SN95031_ADC_LOOP_MAX)) {
		/* Reset stop bit for channels other than 0 and 12 */
		value = snd_soc_read(sn95031_codec, base_addr);
		/* Set the stop bit to zero */
		snd_soc_write(sn95031_codec, base_addr, value & 0xEF);
		/* Index of the first free channel */
		base_addr++;
		channel_index++;
	}

	/* Since this is the last channel, set the stop bit
	   to 1 by ORing the DIE_SENSOR_CODE with 0x10 */
	snd_soc_write(sn95031_codec, base_addr,
				SN95031_AUDIO_DETECT_CODE | 0x10);

	chnl_addr = SN95031_ADC_DATA_START_ADDR + 2 * channel_index;
	pr_debug("mid_initialize : %x", chnl_addr);
	configure_adc(sn95031_codec, 1);
	return chnl_addr;
}


/* reads the ADC registers and gets the mic bias value in mV. */
static unsigned int sn95031_get_mic_bias(struct snd_soc_codec *codec)
{
	u16 adc_adr = sn95031_initialize_adc(codec);
	u16 adc_val1, adc_val2;
	unsigned int mic_bias;

	sn95031_enable_mic_bias(codec);

	/* Enable the sound card for conversion before reading */
	snd_soc_write(codec, SN95031_ADC1CNTL3, 0x05);
	/* Re-toggle the RRDATARD bit */
	snd_soc_write(codec, SN95031_ADC1CNTL3, 0x04);

	/* Read the higher bits of data */
	msleep(1000);
	adc_val1 = snd_soc_read(codec, adc_adr);
	adc_adr++;
	adc_val2 = snd_soc_read(codec, adc_adr);

	/* Adding lower two bits to the higher bits */
	mic_bias = (adc_val1 << 2) + (adc_val2 & 3);
	mic_bias = (mic_bias * SN95031_ADC_ONE_LSB_MULTIPLIER) / 1000;
	pr_debug("mic bias = %dmV\n", mic_bias);
	return mic_bias;
}
EXPORT_SYMBOL_GPL(sn95031_get_mic_bias);
/*end - adc helper functions */

static inline unsigned int sn95031_read(struct snd_soc_codec *codec,
			unsigned int reg)
{
	u8 value = 0;
	int ret;

	ret = intel_scu_ipc_ioread8(reg, &value);
	if (ret)
		pr_err("read of %x failed, err %d\n", reg, ret);
	return value;

}

static inline int sn95031_write(struct snd_soc_codec *codec,
			unsigned int reg, unsigned int value)
{
	int ret;

	ret = intel_scu_ipc_iowrite8(reg, value);
	if (ret)
		pr_err("write of %x failed, err %d\n", reg, ret);
	return ret;
}

static int sn95031_set_vaud_bias(struct snd_soc_codec *codec,
		enum snd_soc_bias_level level)
{
	switch (level) {
	case SND_SOC_BIAS_ON:
		break;

	case SND_SOC_BIAS_PREPARE:
		if (codec->dapm.bias_level == SND_SOC_BIAS_STANDBY) {
			pr_debug("vaud_bias powering up pll\n");
			/* power up the pll */
			snd_soc_write(codec, SN95031_AUDPLLCTRL, BIT(5));
			/* enable pcm 2 */
			snd_soc_update_bits(codec, SN95031_PCM2C2,
					BIT(0), BIT(0));
		}
		break;

	case SND_SOC_BIAS_STANDBY:
		if (codec->dapm.bias_level == SND_SOC_BIAS_OFF) {
			pr_debug("vaud_bias power up rail\n");
			/* power up the rail */
			snd_soc_write(codec, SN95031_VAUD,
					BIT(2)|BIT(1)|BIT(0));
			msleep(1);
		} else if (codec->dapm.bias_level == SND_SOC_BIAS_PREPARE) {
			/* turn off pcm */
			pr_debug("vaud_bias power dn pcm\n");
			snd_soc_update_bits(codec, SN95031_PCM2C2, BIT(0), 0);
			snd_soc_write(codec, SN95031_AUDPLLCTRL, 0);
		}
		break;


	case SND_SOC_BIAS_OFF:
		pr_debug("vaud_bias _OFF doing rail shutdown\n");
		snd_soc_write(codec, SN95031_VAUD, BIT(3));
		break;
	}

	codec->dapm.bias_level = level;
	return 0;
}

static int sn95031_vhs_event(struct snd_soc_dapm_widget *w,
		    struct snd_kcontrol *kcontrol, int event)
{
	if (SND_SOC_DAPM_EVENT_ON(event)) {
		pr_debug("VHS SND_SOC_DAPM_EVENT_ON doing rail startup now\n");
		/* power up the rail */
		snd_soc_write(w->codec, SN95031_VHSP, 0x3D);
		snd_soc_write(w->codec, SN95031_VHSN, 0x3F);
		msleep(1);
	} else if (SND_SOC_DAPM_EVENT_OFF(event)) {
		pr_debug("VHS SND_SOC_DAPM_EVENT_OFF doing rail shutdown\n");
		snd_soc_write(w->codec, SN95031_VHSP, 0xC4);
		snd_soc_write(w->codec, SN95031_VHSN, 0x04);
	}
	return 0;
}

static int sn95031_vihf_event(struct snd_soc_dapm_widget *w,
		    struct snd_kcontrol *kcontrol, int event)
{
	if (SND_SOC_DAPM_EVENT_ON(event)) {
		pr_debug("VIHF SND_SOC_DAPM_EVENT_ON doing rail startup now\n");
		/* power up the rail */
		snd_soc_write(w->codec, SN95031_VIHF, 0x27);
		msleep(1);
	} else if (SND_SOC_DAPM_EVENT_OFF(event)) {
		pr_debug("VIHF SND_SOC_DAPM_EVENT_OFF doing rail shutdown\n");
		snd_soc_write(w->codec, SN95031_VIHF, 0x24);
	}
	return 0;
}

static int sn95031_dmic12_event(struct snd_soc_dapm_widget *w,
			struct snd_kcontrol *k, int event)
{
	unsigned int ldo = 0, clk_dir = 0, data_dir = 0;

	if (SND_SOC_DAPM_EVENT_ON(event)) {
		ldo = BIT(5)|BIT(4);
		clk_dir = BIT(0);
		data_dir = BIT(7);
	}
	/* program DMIC LDO, clock and set clock */
	snd_soc_update_bits(w->codec, SN95031_MICBIAS, BIT(5)|BIT(4), ldo);
	snd_soc_update_bits(w->codec, SN95031_DMICBUF0123, BIT(0), clk_dir);
	snd_soc_update_bits(w->codec, SN95031_DMICBUF0123, BIT(7), data_dir);
	return 0;
}

static int sn95031_dmic34_event(struct snd_soc_dapm_widget *w,
			struct snd_kcontrol *k, int event)
{
	unsigned int ldo = 0, clk_dir = 0, data_dir = 0;

	if (SND_SOC_DAPM_EVENT_ON(event)) {
		ldo = BIT(5)|BIT(4);
		clk_dir = BIT(2);
		data_dir = BIT(1);
	}
	/* program DMIC LDO, clock and set clock */
	snd_soc_update_bits(w->codec, SN95031_MICBIAS, BIT(5)|BIT(4), ldo);
	snd_soc_update_bits(w->codec, SN95031_DMICBUF0123, BIT(2), clk_dir);
	snd_soc_update_bits(w->codec, SN95031_DMICBUF45, BIT(1), data_dir);
	return 0;
}

static int sn95031_dmic56_event(struct snd_soc_dapm_widget *w,
			struct snd_kcontrol *k, int event)
{
	unsigned int ldo = 0;

	if (SND_SOC_DAPM_EVENT_ON(event))
		ldo = BIT(7)|BIT(6);

	/* program DMIC LDO */
	snd_soc_update_bits(w->codec, SN95031_MICBIAS, BIT(7)|BIT(6), ldo);
	return 0;
}

/* mux controls */
static const char *sn95031_mic_texts[] = { "AMIC", "LineIn" };

static const struct soc_enum sn95031_micl_enum =
	SOC_ENUM_SINGLE(SN95031_ADCCONFIG, 1, 2, sn95031_mic_texts);

static const struct snd_kcontrol_new sn95031_micl_mux_control =
	SOC_DAPM_ENUM("Route", sn95031_micl_enum);

static const struct soc_enum sn95031_micr_enum =
	SOC_ENUM_SINGLE(SN95031_ADCCONFIG, 3, 2, sn95031_mic_texts);

static const struct snd_kcontrol_new sn95031_micr_mux_control =
	SOC_DAPM_ENUM("Route", sn95031_micr_enum);

static const char *sn95031_input_texts[] = {	"DMIC1", "DMIC2", "DMIC3",
						"DMIC4", "DMIC5", "DMIC6",
						"ADC Left", "ADC Right" };

static const struct soc_enum sn95031_input1_enum =
	SOC_ENUM_SINGLE(SN95031_AUDIOMUX12, 0, 8, sn95031_input_texts);

static const struct snd_kcontrol_new sn95031_input1_mux_control =
	SOC_DAPM_ENUM("Route", sn95031_input1_enum);

static const struct soc_enum sn95031_input2_enum =
	SOC_ENUM_SINGLE(SN95031_AUDIOMUX12, 4, 8, sn95031_input_texts);

static const struct snd_kcontrol_new sn95031_input2_mux_control =
	SOC_DAPM_ENUM("Route", sn95031_input2_enum);

static const struct soc_enum sn95031_input3_enum =
	SOC_ENUM_SINGLE(SN95031_AUDIOMUX34, 0, 8, sn95031_input_texts);

static const struct snd_kcontrol_new sn95031_input3_mux_control =
	SOC_DAPM_ENUM("Route", sn95031_input3_enum);

static const struct soc_enum sn95031_input4_enum =
	SOC_ENUM_SINGLE(SN95031_AUDIOMUX34, 4, 8, sn95031_input_texts);

static const struct snd_kcontrol_new sn95031_input4_mux_control =
	SOC_DAPM_ENUM("Route", sn95031_input4_enum);

/* capture path controls */

static const char *sn95031_micmode_text[] = {"Single Ended", "Differential"};

/* 0dB to 30dB in 10dB steps */
static const DECLARE_TLV_DB_SCALE(mic_tlv, 0, 10, 0);

static const struct soc_enum sn95031_micmode1_enum =
	SOC_ENUM_SINGLE(SN95031_MICAMP1, 1, 2, sn95031_micmode_text);
static const struct soc_enum sn95031_micmode2_enum =
	SOC_ENUM_SINGLE(SN95031_MICAMP2, 1, 2, sn95031_micmode_text);

static const char *sn95031_dmic_cfg_text[] = {"GPO", "DMIC"};

static const struct soc_enum sn95031_dmic12_cfg_enum =
	SOC_ENUM_SINGLE(SN95031_DMICMUX, 0, 2, sn95031_dmic_cfg_text);
static const struct soc_enum sn95031_dmic34_cfg_enum =
	SOC_ENUM_SINGLE(SN95031_DMICMUX, 1, 2, sn95031_dmic_cfg_text);
static const struct soc_enum sn95031_dmic56_cfg_enum =
	SOC_ENUM_SINGLE(SN95031_DMICMUX, 2, 2, sn95031_dmic_cfg_text);

static const struct snd_kcontrol_new sn95031_snd_controls[] = {
	SOC_ENUM("Mic1Mode Capture Route", sn95031_micmode1_enum),
	SOC_ENUM("Mic2Mode Capture Route", sn95031_micmode2_enum),
	SOC_ENUM("DMIC12 Capture Route", sn95031_dmic12_cfg_enum),
	SOC_ENUM("DMIC34 Capture Route", sn95031_dmic34_cfg_enum),
	SOC_ENUM("DMIC56 Capture Route", sn95031_dmic56_cfg_enum),
	SOC_SINGLE_TLV("Mic1 Capture Volume", SN95031_MICAMP1,
			2, 4, 0, mic_tlv),
	SOC_SINGLE_TLV("Mic2 Capture Volume", SN95031_MICAMP2,
			2, 4, 0, mic_tlv),
};

/* DAPM widgets */
static const struct snd_soc_dapm_widget sn95031_dapm_widgets[] = {

	/* all end points mic, hs etc */
	SND_SOC_DAPM_OUTPUT("HPOUTL"),
	SND_SOC_DAPM_OUTPUT("HPOUTR"),
	SND_SOC_DAPM_OUTPUT("EPOUT"),
	SND_SOC_DAPM_OUTPUT("IHFOUTL"),
	SND_SOC_DAPM_OUTPUT("IHFOUTR"),
	SND_SOC_DAPM_OUTPUT("LINEOUTL"),
	SND_SOC_DAPM_OUTPUT("LINEOUTR"),
	SND_SOC_DAPM_OUTPUT("VIB1OUT"),
	SND_SOC_DAPM_OUTPUT("VIB2OUT"),

	SND_SOC_DAPM_INPUT("AMIC1"), /* headset mic */
	SND_SOC_DAPM_INPUT("AMIC2"),
	SND_SOC_DAPM_INPUT("DMIC1"),
	SND_SOC_DAPM_INPUT("DMIC2"),
	SND_SOC_DAPM_INPUT("DMIC3"),
	SND_SOC_DAPM_INPUT("DMIC4"),
	SND_SOC_DAPM_INPUT("DMIC5"),
	SND_SOC_DAPM_INPUT("DMIC6"),
	SND_SOC_DAPM_INPUT("LINEINL"),
	SND_SOC_DAPM_INPUT("LINEINR"),

	SND_SOC_DAPM_MICBIAS("AMIC1Bias", SN95031_MICBIAS, 2, 0),
	SND_SOC_DAPM_MICBIAS("AMIC2Bias", SN95031_MICBIAS, 3, 0),
	SND_SOC_DAPM_MICBIAS("DMIC12Bias", SN95031_DMICMUX, 3, 0),
	SND_SOC_DAPM_MICBIAS("DMIC34Bias", SN95031_DMICMUX, 4, 0),
	SND_SOC_DAPM_MICBIAS("DMIC56Bias", SN95031_DMICMUX, 5, 0),

	SND_SOC_DAPM_SUPPLY("DMIC12supply", SN95031_DMICLK, 0, 0,
				sn95031_dmic12_event,
				SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMD),
	SND_SOC_DAPM_SUPPLY("DMIC34supply", SN95031_DMICLK, 1, 0,
				sn95031_dmic34_event,
				SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMD),
	SND_SOC_DAPM_SUPPLY("DMIC56supply", SN95031_DMICLK, 2, 0,
				sn95031_dmic56_event,
				SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMD),

	SND_SOC_DAPM_AIF_OUT("PCM_Out", "Capture", 0,
			SND_SOC_NOPM, 0, 0),

	SND_SOC_DAPM_SUPPLY("Headset Rail", SND_SOC_NOPM, 0, 0,
			sn95031_vhs_event,
			SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMD),
	SND_SOC_DAPM_SUPPLY("Speaker Rail", SND_SOC_NOPM, 0, 0,
			sn95031_vihf_event,
			SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMD),

	/* playback path driver enables */
	SND_SOC_DAPM_PGA("Headset Left Playback",
			SN95031_DRIVEREN, 0, 0, NULL, 0),
	SND_SOC_DAPM_PGA("Headset Right Playback",
			SN95031_DRIVEREN, 1, 0, NULL, 0),
	SND_SOC_DAPM_PGA("Speaker Left Playback",
			SN95031_DRIVEREN, 2, 0, NULL, 0),
	SND_SOC_DAPM_PGA("Speaker Right Playback",
			SN95031_DRIVEREN, 3, 0, NULL, 0),
	SND_SOC_DAPM_PGA("Vibra1 Playback",
			SN95031_DRIVEREN, 4, 0, NULL, 0),
	SND_SOC_DAPM_PGA("Vibra2 Playback",
			SN95031_DRIVEREN, 5, 0, NULL, 0),
	SND_SOC_DAPM_PGA("Earpiece Playback",
			SN95031_DRIVEREN, 6, 0, NULL, 0),
	SND_SOC_DAPM_PGA("Lineout Left Playback",
			SN95031_LOCTL, 0, 0, NULL, 0),
	SND_SOC_DAPM_PGA("Lineout Right Playback",
			SN95031_LOCTL, 4, 0, NULL, 0),

	/* playback path filter enable */
	SND_SOC_DAPM_PGA("Headset Left Filter",
			SN95031_HSEPRXCTRL, 4, 0, NULL, 0),
	SND_SOC_DAPM_PGA("Headset Right Filter",
			SN95031_HSEPRXCTRL, 5, 0,  NULL, 0),
	SND_SOC_DAPM_PGA("Speaker Left Filter",
			SN95031_IHFRXCTRL, 0, 0,  NULL, 0),
	SND_SOC_DAPM_PGA("Speaker Right Filter",
			SN95031_IHFRXCTRL, 1, 0,  NULL, 0),

	/* DACs */
	SND_SOC_DAPM_DAC("HSDAC Left", "Headset",
			SN95031_DACCONFIG, 0, 0),
	SND_SOC_DAPM_DAC("HSDAC Right", "Headset",
			SN95031_DACCONFIG, 1, 0),
	SND_SOC_DAPM_DAC("IHFDAC Left", "Speaker",
			SN95031_DACCONFIG, 2, 0),
	SND_SOC_DAPM_DAC("IHFDAC Right", "Speaker",
			SN95031_DACCONFIG, 3, 0),
	SND_SOC_DAPM_DAC("Vibra1 DAC", "Vibra1",
			SN95031_VIB1C5, 1, 0),
	SND_SOC_DAPM_DAC("Vibra2 DAC", "Vibra2",
			SN95031_VIB2C5, 1, 0),

	/* capture widgets */
	SND_SOC_DAPM_PGA("LineIn Enable Left", SN95031_MICAMP1,
				7, 0, NULL, 0),
	SND_SOC_DAPM_PGA("LineIn Enable Right", SN95031_MICAMP2,
				7, 0, NULL, 0),

	SND_SOC_DAPM_PGA("MIC1 Enable", SN95031_MICAMP1, 0, 0, NULL, 0),
	SND_SOC_DAPM_PGA("MIC2 Enable", SN95031_MICAMP2, 0, 0, NULL, 0),
	SND_SOC_DAPM_PGA("TX1 Enable", SN95031_AUDIOTXEN, 2, 0, NULL, 0),
	SND_SOC_DAPM_PGA("TX2 Enable", SN95031_AUDIOTXEN, 3, 0, NULL, 0),
	SND_SOC_DAPM_PGA("TX3 Enable", SN95031_AUDIOTXEN, 4, 0, NULL, 0),
	SND_SOC_DAPM_PGA("TX4 Enable", SN95031_AUDIOTXEN, 5, 0, NULL, 0),

	/* ADC have null stream as they will be turned ON by TX path */
	SND_SOC_DAPM_ADC("ADC Left", NULL,
			SN95031_ADCCONFIG, 0, 0),
	SND_SOC_DAPM_ADC("ADC Right", NULL,
			SN95031_ADCCONFIG, 2, 0),

	SND_SOC_DAPM_MUX("Mic_InputL Capture Route",
			SND_SOC_NOPM, 0, 0, &sn95031_micl_mux_control),
	SND_SOC_DAPM_MUX("Mic_InputR Capture Route",
			SND_SOC_NOPM, 0, 0, &sn95031_micr_mux_control),

	SND_SOC_DAPM_MUX("Txpath1 Capture Route",
			SND_SOC_NOPM, 0, 0, &sn95031_input1_mux_control),
	SND_SOC_DAPM_MUX("Txpath2 Capture Route",
			SND_SOC_NOPM, 0, 0, &sn95031_input2_mux_control),
	SND_SOC_DAPM_MUX("Txpath3 Capture Route",
			SND_SOC_NOPM, 0, 0, &sn95031_input3_mux_control),
	SND_SOC_DAPM_MUX("Txpath4 Capture Route",
			SND_SOC_NOPM, 0, 0, &sn95031_input4_mux_control),

};

static const struct snd_soc_dapm_route sn95031_audio_map[] = {
	/* headset and earpiece map */
	{ "HPOUTL", NULL, "Headset Rail"},
	{ "HPOUTR", NULL, "Headset Rail"},
	{ "HPOUTL", NULL, "Headset Left Playback" },
	{ "HPOUTR", NULL, "Headset Right Playback" },
	{ "EPOUT", NULL, "Earpiece Playback" },
	{ "Headset Left Playback", NULL, "Headset Left Filter"},
	{ "Headset Right Playback", NULL, "Headset Right Filter"},
	{ "Earpiece Playback", NULL, "Headset Left Filter"},
	{ "Headset Left Filter", NULL, "HSDAC Left"},
	{ "Headset Right Filter", NULL, "HSDAC Right"},

	/* speaker map */
	{ "IHFOUTL", NULL, "Speaker Rail"},
	{ "IHFOUTR", NULL, "Speaker Rail"},
	{ "IHFOUTL", "NULL", "Speaker Left Playback"},
	{ "IHFOUTR", "NULL", "Speaker Right Playback"},
	{ "Speaker Left Playback", NULL, "Speaker Left Filter"},
	{ "Speaker Right Playback", NULL, "Speaker Right Filter"},
	{ "Speaker Left Filter", NULL, "IHFDAC Left"},
	{ "Speaker Right Filter", NULL, "IHFDAC Right"},

	/* vibra map */
	{ "VIB1OUT", NULL, "Vibra1 Playback"},
	{ "Vibra1 Playback", NULL, "Vibra1 DAC"},

	{ "VIB2OUT", NULL, "Vibra2 Playback"},
	{ "Vibra2 Playback", NULL, "Vibra2 DAC"},

	/* lineout */
	{ "LINEOUTL", NULL, "Lineout Left Playback"},
	{ "LINEOUTR", NULL, "Lineout Right Playback"},
	{ "Lineout Left Playback", NULL, "Headset Left Filter"},
	{ "Lineout Left Playback", NULL, "Speaker Left Filter"},
	{ "Lineout Left Playback", NULL, "Vibra1 DAC"},
	{ "Lineout Right Playback", NULL, "Headset Right Filter"},
	{ "Lineout Right Playback", NULL, "Speaker Right Filter"},
	{ "Lineout Right Playback", NULL, "Vibra2 DAC"},

	/* Headset (AMIC1) mic */
	{ "AMIC1Bias", NULL, "AMIC1"},
	{ "MIC1 Enable", NULL, "AMIC1Bias"},
	{ "Mic_InputL Capture Route", "AMIC", "MIC1 Enable"},

	/* AMIC2 */
	{ "AMIC2Bias", NULL, "AMIC2"},
	{ "MIC2 Enable", NULL, "AMIC2Bias"},
	{ "Mic_InputR Capture Route", "AMIC", "MIC2 Enable"},


	/* Linein */
	{ "LineIn Enable Left", NULL, "LINEINL"},
	{ "LineIn Enable Right", NULL, "LINEINR"},
	{ "Mic_InputL Capture Route", "LineIn", "LineIn Enable Left"},
	{ "Mic_InputR Capture Route", "LineIn", "LineIn Enable Right"},

	/* ADC connection */
	{ "ADC Left", NULL, "Mic_InputL Capture Route"},
	{ "ADC Right", NULL, "Mic_InputR Capture Route"},

	/*DMIC connections */
	{ "DMIC1", NULL, "DMIC12supply"},
	{ "DMIC2", NULL, "DMIC12supply"},
	{ "DMIC3", NULL, "DMIC34supply"},
	{ "DMIC4", NULL, "DMIC34supply"},
	{ "DMIC5", NULL, "DMIC56supply"},
	{ "DMIC6", NULL, "DMIC56supply"},

	{ "DMIC12Bias", NULL, "DMIC1"},
	{ "DMIC12Bias", NULL, "DMIC2"},
	{ "DMIC34Bias", NULL, "DMIC3"},
	{ "DMIC34Bias", NULL, "DMIC4"},
	{ "DMIC56Bias", NULL, "DMIC5"},
	{ "DMIC56Bias", NULL, "DMIC6"},

	/*TX path inputs*/
	{ "Txpath1 Capture Route", "ADC Left", "ADC Left"},
	{ "Txpath2 Capture Route", "ADC Left", "ADC Left"},
	{ "Txpath3 Capture Route", "ADC Left", "ADC Left"},
	{ "Txpath4 Capture Route", "ADC Left", "ADC Left"},
	{ "Txpath1 Capture Route", "ADC Right", "ADC Right"},
	{ "Txpath2 Capture Route", "ADC Right", "ADC Right"},
	{ "Txpath3 Capture Route", "ADC Right", "ADC Right"},
	{ "Txpath4 Capture Route", "ADC Right", "ADC Right"},
	{ "Txpath1 Capture Route", "DMIC1", "DMIC1"},
	{ "Txpath2 Capture Route", "DMIC1", "DMIC1"},
	{ "Txpath3 Capture Route", "DMIC1", "DMIC1"},
	{ "Txpath4 Capture Route", "DMIC1", "DMIC1"},
	{ "Txpath1 Capture Route", "DMIC2", "DMIC2"},
	{ "Txpath2 Capture Route", "DMIC2", "DMIC2"},
	{ "Txpath3 Capture Route", "DMIC2", "DMIC2"},
	{ "Txpath4 Capture Route", "DMIC2", "DMIC2"},
	{ "Txpath1 Capture Route", "DMIC3", "DMIC3"},
	{ "Txpath2 Capture Route", "DMIC3", "DMIC3"},
	{ "Txpath3 Capture Route", "DMIC3", "DMIC3"},
	{ "Txpath4 Capture Route", "DMIC3", "DMIC3"},
	{ "Txpath1 Capture Route", "DMIC4", "DMIC4"},
	{ "Txpath2 Capture Route", "DMIC4", "DMIC4"},
	{ "Txpath3 Capture Route", "DMIC4", "DMIC4"},
	{ "Txpath4 Capture Route", "DMIC4", "DMIC4"},
	{ "Txpath1 Capture Route", "DMIC5", "DMIC5"},
	{ "Txpath2 Capture Route", "DMIC5", "DMIC5"},
	{ "Txpath3 Capture Route", "DMIC5", "DMIC5"},
	{ "Txpath4 Capture Route", "DMIC5", "DMIC5"},
	{ "Txpath1 Capture Route", "DMIC6", "DMIC6"},
	{ "Txpath2 Capture Route", "DMIC6", "DMIC6"},
	{ "Txpath3 Capture Route", "DMIC6", "DMIC6"},
	{ "Txpath4 Capture Route", "DMIC6", "DMIC6"},

	/* tx path */
	{ "TX1 Enable", NULL, "Txpath1 Capture Route"},
	{ "TX2 Enable", NULL, "Txpath2 Capture Route"},
	{ "TX3 Enable", NULL, "Txpath3 Capture Route"},
	{ "TX4 Enable", NULL, "Txpath4 Capture Route"},
	{ "PCM_Out", NULL, "TX1 Enable"},
	{ "PCM_Out", NULL, "TX2 Enable"},
	{ "PCM_Out", NULL, "TX3 Enable"},
	{ "PCM_Out", NULL, "TX4 Enable"},

};

/* speaker and headset mutes, for audio pops and clicks */
static int sn95031_pcm_hs_mute(struct snd_soc_dai *dai, int mute)
{
	snd_soc_update_bits(dai->codec,
			SN95031_HSLVOLCTRL, BIT(7), (!mute << 7));
	snd_soc_update_bits(dai->codec,
			SN95031_HSRVOLCTRL, BIT(7), (!mute << 7));
	return 0;
}

static int sn95031_pcm_spkr_mute(struct snd_soc_dai *dai, int mute)
{
	snd_soc_update_bits(dai->codec,
			SN95031_IHFLVOLCTRL, BIT(7), (!mute << 7));
	snd_soc_update_bits(dai->codec,
			SN95031_IHFRVOLCTRL, BIT(7), (!mute << 7));
	return 0;
}

int sn95031_pcm_hw_params(struct snd_pcm_substream *substream,
		struct snd_pcm_hw_params *params, struct snd_soc_dai *dai)
{
	unsigned int format, rate;

	switch (params_format(params)) {
	case SNDRV_PCM_FORMAT_S16_LE:
		format = BIT(4)|BIT(5);
		break;

	case SNDRV_PCM_FORMAT_S24_LE:
		format = 0;
		break;
	default:
		return -EINVAL;
	}
	snd_soc_update_bits(dai->codec, SN95031_PCM2C2,
			BIT(4)|BIT(5), format);

	switch (params_rate(params)) {
	case 48000:
		pr_debug("RATE_48000\n");
		rate = 0;
		break;

	case 44100:
		pr_debug("RATE_44100\n");
		rate = BIT(7);
		break;

	default:
		pr_err("ERR rate %d\n", params_rate(params));
		return -EINVAL;
	}
	snd_soc_update_bits(dai->codec, SN95031_PCM1C1, BIT(7), rate);

	return 0;
}

/* Codec DAI section */
static struct snd_soc_dai_ops sn95031_headset_dai_ops = {
	.digital_mute	= sn95031_pcm_hs_mute,
	.hw_params	= sn95031_pcm_hw_params,
};

static struct snd_soc_dai_ops sn95031_speaker_dai_ops = {
	.digital_mute	= sn95031_pcm_spkr_mute,
	.hw_params	= sn95031_pcm_hw_params,
};

static struct snd_soc_dai_ops sn95031_vib1_dai_ops = {
	.hw_params	= sn95031_pcm_hw_params,
};

static struct snd_soc_dai_ops sn95031_vib2_dai_ops = {
	.hw_params	= sn95031_pcm_hw_params,
};

struct snd_soc_dai_driver sn95031_dais[] = {
{
	.name = "SN95031 Headset",
	.playback = {
		.stream_name = "Headset",
		.channels_min = 2,
		.channels_max = 2,
		.rates = SN95031_RATES,
		.formats = SN95031_FORMATS,
	},
	.capture = {
		.stream_name = "Capture",
		.channels_min = 1,
		.channels_max = 5,
		.rates = SN95031_RATES,
		.formats = SN95031_FORMATS,
	},
	.ops = &sn95031_headset_dai_ops,
},
{	.name = "SN95031 Speaker",
	.playback = {
		.stream_name = "Speaker",
		.channels_min = 2,
		.channels_max = 2,
		.rates = SN95031_RATES,
		.formats = SN95031_FORMATS,
	},
	.ops = &sn95031_speaker_dai_ops,
},
{	.name = "SN95031 Vibra1",
	.playback = {
		.stream_name = "Vibra1",
		.channels_min = 1,
		.channels_max = 1,
		.rates = SN95031_RATES,
		.formats = SN95031_FORMATS,
	},
	.ops = &sn95031_vib1_dai_ops,
},
{	.name = "SN95031 Vibra2",
	.playback = {
		.stream_name = "Vibra2",
		.channels_min = 1,
		.channels_max = 1,
		.rates = SN95031_RATES,
		.formats = SN95031_FORMATS,
	},
	.ops = &sn95031_vib2_dai_ops,
},
};

static inline void sn95031_disable_jack_btn(struct snd_soc_codec *codec)
{
	snd_soc_write(codec, SN95031_BTNCTRL2, 0x00);
}

static inline void sn95031_enable_jack_btn(struct snd_soc_codec *codec)
{
	snd_soc_write(codec, SN95031_BTNCTRL1, 0x77);
	snd_soc_write(codec, SN95031_BTNCTRL2, 0x01);
}

static int sn95031_get_headset_state(struct snd_soc_jack *mfld_jack)
{
	int micbias = sn95031_get_mic_bias(mfld_jack->codec);

	int jack_type = snd_soc_jack_get_type(mfld_jack, micbias);

	pr_debug("jack type detected = %d\n", jack_type);
	if (jack_type == SND_JACK_HEADSET)
		sn95031_enable_jack_btn(mfld_jack->codec);
	return jack_type;
}

void sn95031_jack_detection(struct mfld_jack_data *jack_data)
{
	unsigned int status;
	unsigned int mask = SND_JACK_BTN_0 | SND_JACK_BTN_1 | SND_JACK_HEADSET;

	pr_debug("interrupt id read in sram = 0x%x\n", jack_data->intr_id);
	if (jack_data->intr_id & 0x1) {
		pr_debug("short_push detected\n");
		status = SND_JACK_HEADSET | SND_JACK_BTN_0;
	} else if (jack_data->intr_id & 0x2) {
		pr_debug("long_push detected\n");
		status = SND_JACK_HEADSET | SND_JACK_BTN_1;
	} else if (jack_data->intr_id & 0x4) {
		pr_debug("headset or headphones inserted\n");
		status = sn95031_get_headset_state(jack_data->mfld_jack);
	} else if (jack_data->intr_id & 0x8) {
		pr_debug("headset or headphones removed\n");
		status = 0;
		sn95031_disable_jack_btn(jack_data->mfld_jack->codec);
	} else {
		pr_err("unidentified interrupt\n");
		return;
	}

	snd_soc_jack_report(jack_data->mfld_jack, status, mask);
	/*button pressed and released so we send explicit button release */
	if ((status & SND_JACK_BTN_0) | (status & SND_JACK_BTN_1))
		snd_soc_jack_report(jack_data->mfld_jack,
				SND_JACK_HEADSET, mask);
}
EXPORT_SYMBOL_GPL(sn95031_jack_detection);

/* codec registration */
static int sn95031_codec_probe(struct snd_soc_codec *codec)
{
	pr_debug("codec_probe called\n");

	codec->dapm.bias_level = SND_SOC_BIAS_OFF;
	codec->dapm.idle_bias_off = 1;

	/* PCM interface config
	 * This sets the pcm rx slot conguration to max 6 slots
	 * for max 4 dais (2 stereo and 2 mono)
	 */
	snd_soc_write(codec, SN95031_PCM2RXSLOT01, 0x10);
	snd_soc_write(codec, SN95031_PCM2RXSLOT23, 0x32);
	snd_soc_write(codec, SN95031_PCM2RXSLOT45, 0x54);
	snd_soc_write(codec, SN95031_PCM2TXSLOT01, 0x10);
	snd_soc_write(codec, SN95031_PCM2TXSLOT23, 0x32);
	/* pcm port setting
	 * This sets the pcm port to slave and clock at 19.2Mhz which
	 * can support 6slots, sampling rate set per stream in hw-params
	 */
	snd_soc_write(codec, SN95031_PCM1C1, 0x00);
	snd_soc_write(codec, SN95031_PCM2C1, 0x01);
	snd_soc_write(codec, SN95031_PCM2C2, 0x0A);
	snd_soc_write(codec, SN95031_HSMIXER, BIT(0)|BIT(4));
	/* vendor vibra workround, the vibras are muted by
	 * custom register so unmute them
	 */
	snd_soc_write(codec, SN95031_SSR5, 0x80);
	snd_soc_write(codec, SN95031_SSR6, 0x80);
	snd_soc_write(codec, SN95031_VIB1C5, 0x00);
	snd_soc_write(codec, SN95031_VIB2C5, 0x00);
	/* configure vibras for pcm port */
	snd_soc_write(codec, SN95031_VIB1C3, 0x00);
	snd_soc_write(codec, SN95031_VIB2C3, 0x00);

	/* soft mute ramp time */
	snd_soc_write(codec, SN95031_SOFTMUTE, 0x3);
	/* fix the initial volume at 1dB,
	 * default in +9dB,
	 * 1dB give optimal swing on DAC, amps
	 */
	snd_soc_write(codec, SN95031_HSLVOLCTRL, 0x08);
	snd_soc_write(codec, SN95031_HSRVOLCTRL, 0x08);
	snd_soc_write(codec, SN95031_IHFLVOLCTRL, 0x08);
	snd_soc_write(codec, SN95031_IHFRVOLCTRL, 0x08);
	/* dac mode and lineout workaround */
	snd_soc_write(codec, SN95031_SSR2, 0x10);
	snd_soc_write(codec, SN95031_SSR3, 0x40);

	snd_soc_add_controls(codec, sn95031_snd_controls,
			     ARRAY_SIZE(sn95031_snd_controls));

	return 0;
}

static int sn95031_codec_remove(struct snd_soc_codec *codec)
{
	pr_debug("codec_remove called\n");
	sn95031_set_vaud_bias(codec, SND_SOC_BIAS_OFF);

	return 0;
}

struct snd_soc_codec_driver sn95031_codec = {
	.probe		= sn95031_codec_probe,
	.remove		= sn95031_codec_remove,
	.read		= sn95031_read,
	.write		= sn95031_write,
	.set_bias_level	= sn95031_set_vaud_bias,
	.dapm_widgets	= sn95031_dapm_widgets,
	.num_dapm_widgets	= ARRAY_SIZE(sn95031_dapm_widgets),
	.dapm_routes	= sn95031_audio_map,
	.num_dapm_routes	= ARRAY_SIZE(sn95031_audio_map),
};

static int __devinit sn95031_device_probe(struct platform_device *pdev)
{
	pr_debug("codec device probe called for %s\n", dev_name(&pdev->dev));
	return snd_soc_register_codec(&pdev->dev, &sn95031_codec,
			sn95031_dais, ARRAY_SIZE(sn95031_dais));
}

static int __devexit sn95031_device_remove(struct platform_device *pdev)
{
	pr_debug("codec device remove called\n");
	snd_soc_unregister_codec(&pdev->dev);
	return 0;
}

static struct platform_driver sn95031_codec_driver = {
	.driver		= {
		.name		= "sn95031",
		.owner		= THIS_MODULE,
	},
	.probe		= sn95031_device_probe,
	.remove		= __devexit_p(sn95031_device_remove),
};

static int __init sn95031_init(void)
{
	pr_debug("driver init called\n");
	return platform_driver_register(&sn95031_codec_driver);
}
module_init(sn95031_init);

static void __exit sn95031_exit(void)
{
	pr_debug("driver exit called\n");
	platform_driver_unregister(&sn95031_codec_driver);
}
module_exit(sn95031_exit);

MODULE_DESCRIPTION("ASoC TI SN95031 codec driver");
MODULE_AUTHOR("Vinod Koul <vinod.koul@intel.com>");
MODULE_AUTHOR("Harsha Priya <priya.harsha@intel.com>");
MODULE_LICENSE("GPL v2");
MODULE_ALIAS("platform:sn95031");