android_kernel_samsung_sm8650-modules/asoc/codecs/wcd937x/wcd937x.c

/*
 * Copyright (c) 2018, The Linux Foundation. All rights reserved.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 and
 * only version 2 as published by the Free Software Foundation.
 *
 * 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.
 */

#include <linux/module.h>
#include <linux/slab.h>
#include <linux/platform_device.h>
#include <linux/device.h>
#include <linux/delay.h>
#include <linux/kernel.h>
#include <linux/component.h>
#include <sound/soc.h>
#include <sound/tlv.h>
#include <soc/soundwire.h>
#include <linux/regmap.h>
#include <sound/soc.h>
#include <sound/soc-dapm.h>
#include "internal.h"
#include "../wcdcal-hwdep.h"
#include "wcd937x-registers.h"
#include "../msm-cdc-pinctrl.h"
#include <dt-bindings/sound/audio-codec-port-types.h>
#include "../msm-cdc-supply.h"

#define WCD9370_VARIANT 0
#define WCD9375_VARIANT 5

#define NUM_SWRS_DT_PARAMS 5

#define WCD937X_VERSION_1_0 1
#define WCD937X_VERSION_ENTRY_SIZE 32

enum {
	CODEC_TX = 0,
	CODEC_RX,
};

static const DECLARE_TLV_DB_SCALE(line_gain, 0, 7, 1);
static const DECLARE_TLV_DB_SCALE(analog_gain, 0, 25, 1);

static int wcd937x_handle_post_irq(void *data);

static const struct regmap_irq wcd937x_irqs[WCD937X_NUM_IRQS] = {
	REGMAP_IRQ_REG(WCD937X_IRQ_MBHC_BUTTON_PRESS_DET, 0, 0x01),
	REGMAP_IRQ_REG(WCD937X_IRQ_MBHC_BUTTON_RELEASE_DET, 0, 0x02),
	REGMAP_IRQ_REG(WCD937X_IRQ_MBHC_ELECT_INS_REM_DET, 0, 0x04),
	REGMAP_IRQ_REG(WCD937X_IRQ_MBHC_ELECT_INS_REM_LEG_DET, 0, 0x08),
	REGMAP_IRQ_REG(WCD937X_IRQ_MBHC_SW_DET, 0, 0x10),
	REGMAP_IRQ_REG(WCD937X_IRQ_HPHR_OCP_INT, 0, 0x20),
	REGMAP_IRQ_REG(WCD937X_IRQ_HPHR_CNP_INT, 0, 0x40),
	REGMAP_IRQ_REG(WCD937X_IRQ_HPHL_OCP_INT, 0, 0x80),
	REGMAP_IRQ_REG(WCD937X_IRQ_HPHL_CNP_INT, 1, 0x01),
	REGMAP_IRQ_REG(WCD937X_IRQ_EAR_CNP_INT, 1, 0x02),
	REGMAP_IRQ_REG(WCD937X_IRQ_EAR_SCD_INT, 1, 0x04),
	REGMAP_IRQ_REG(WCD937X_IRQ_AUX_CNP_INT, 1, 0x08),
	REGMAP_IRQ_REG(WCD937X_IRQ_AUX_SCD_INT, 1, 0x10),
	REGMAP_IRQ_REG(WCD937X_IRQ_HPHL_PDM_WD_INT, 1, 0x20),
	REGMAP_IRQ_REG(WCD937X_IRQ_HPHR_PDM_WD_INT, 1, 0x40),
	REGMAP_IRQ_REG(WCD937X_IRQ_AUX_PDM_WD_INT, 1, 0x80),
	REGMAP_IRQ_REG(WCD937X_IRQ_LDORT_SCD_INT, 2, 0x01),
	REGMAP_IRQ_REG(WCD937X_IRQ_MBHC_MOISTURE_INT, 2, 0x02),
	REGMAP_IRQ_REG(WCD937X_IRQ_HPHL_SURGE_DET_INT, 2, 0x04),
	REGMAP_IRQ_REG(WCD937X_IRQ_HPHR_SURGE_DET_INT, 2, 0x08),
};

static struct regmap_irq_chip wcd937x_regmap_irq_chip = {
	.name = "wcd937x",
	.irqs = wcd937x_irqs,
	.num_irqs = ARRAY_SIZE(wcd937x_irqs),
	.num_regs = 3,
	.status_base = WCD937X_DIGITAL_INTR_STATUS_0,
	.mask_base = WCD937X_DIGITAL_INTR_MASK_0,
	.type_base = WCD937X_DIGITAL_INTR_LEVEL_0,
	.runtime_pm = false,
	.handle_post_irq = wcd937x_handle_post_irq,
	.irq_drv_data = NULL,
};
static int wcd937x_handle_post_irq(void *data)
{
	struct wcd937x_priv *wcd937x = data;
	int val = 0;
	struct wcd937x_pdata *pdata = NULL;

	pdata = dev_get_platdata(wcd937x->dev);

	regmap_read(wcd937x->regmap, WCD937X_DIGITAL_INTR_STATUS_0, &val);
	dev_dbg(wcd937x->dev, "%s Clear OCP interupts\n", __func__);
	regmap_write(wcd937x->regmap,
			   WCD937X_DIGITAL_INTR_CLEAR_0, 0xFF);
	regmap_write(wcd937x->regmap,
			   WCD937X_DIGITAL_INTR_CLEAR_0, 0x0);
	regmap_read(wcd937x->regmap, WCD937X_DIGITAL_INTR_STATUS_1, &val);
	dev_dbg(wcd937x->dev, "%s Clear SCD interupts\n", __func__);
	regmap_write(wcd937x->regmap,
			   WCD937X_DIGITAL_INTR_CLEAR_1, 0xFF);
	regmap_write(wcd937x->regmap,
			   WCD937X_DIGITAL_INTR_CLEAR_1, 0x0);

	regmap_write(wcd937x->regmap,
			   WCD937X_DIGITAL_INTR_CLEAR_2, 0xFF);
	regmap_write(wcd937x->regmap,
			   WCD937X_DIGITAL_INTR_CLEAR_2, 0x0);

	regmap_read(wcd937x->regmap, WCD937X_DIGITAL_INTR_STATUS_0, &val);
	regmap_read(wcd937x->regmap, WCD937X_DIGITAL_INTR_STATUS_1, &val);
	regmap_read(wcd937x->regmap, WCD937X_DIGITAL_INTR_STATUS_2, &val);
	regmap_read(wcd937x->regmap, WCD937X_DIGITAL_INTR_CLEAR_0, &val);
	regmap_read(wcd937x->regmap, WCD937X_DIGITAL_INTR_CLEAR_1, &val);
	regmap_read(wcd937x->regmap, WCD937X_DIGITAL_INTR_CLEAR_2, &val);

	return IRQ_HANDLED;
}

static int wcd937x_init_reg(struct snd_soc_codec *codec)
{
	snd_soc_update_bits(codec, WCD937X_SLEEP_CTL, 0x0E, 0x0E);
	snd_soc_update_bits(codec, WCD937X_SLEEP_CTL, 0x80, 0x80);
	usleep_range(1000, 1010);
	snd_soc_update_bits(codec, WCD937X_SLEEP_CTL, 0x40, 0x40);
	usleep_range(1000, 1010);
	snd_soc_update_bits(codec, WCD937X_LDORXTX_CONFIG, 0x10, 0x00);
	snd_soc_update_bits(codec, WCD937X_BIAS_VBG_FINE_ADJ, 0xF0, 0x80);
	snd_soc_update_bits(codec, WCD937X_ANA_BIAS, 0x80, 0x80);
	snd_soc_update_bits(codec, WCD937X_ANA_BIAS, 0x40, 0x40);
	usleep_range(10000, 10010);
	snd_soc_update_bits(codec, WCD937X_ANA_BIAS, 0x40, 0x00);

	return 0;
}

static int wcd937x_set_port_params(struct snd_soc_codec *codec, u8 slv_prt_type,
			u8 *port_id, u8 *num_ch, u8 *ch_mask, u32 *ch_rate,
			u8 *port_type, u8 path)
{
	int i, j;
	u8 num_ports;
	struct codec_port_info (*map)[MAX_PORT][MAX_CH_PER_PORT];
	struct wcd937x_priv *wcd937x = snd_soc_codec_get_drvdata(codec);

	switch (path) {
	case CODEC_RX:
		map = &wcd937x->rx_port_mapping;
		num_ports = wcd937x->num_rx_ports;
		break;
	case CODEC_TX:
		map = &wcd937x->tx_port_mapping;
		num_ports = wcd937x->num_tx_ports;
		break;
	}

	for (i = 0; i <= num_ports; i++) {
		for (j = 0; j < MAX_CH_PER_PORT; j++) {
			if ((*map)[i][j].slave_port_type == slv_prt_type)
				goto found;
		}
	}
found:
	if (i > num_ports || j == MAX_CH_PER_PORT) {
		dev_err(codec->dev, "%s Failed to find slave port for type %u\n",
						__func__, slv_prt_type);
		return -EINVAL;
	}
	*port_id = i;
	*num_ch = (*map)[i][j].num_ch;
	*ch_mask = (*map)[i][j].ch_mask;
	*ch_rate = (*map)[i][j].ch_rate;
	*port_type = (*map)[i][j].master_port_type;

	return 0;
}

static int wcd937x_parse_port_mapping(struct device *dev,
			char *prop, u8 path)
{
	u32 *dt_array, map_size, map_length;
	u32 port_num, ch_mask, ch_rate, old_port_num = 0;
	u32 slave_port_type, master_port_type;
	u32 i, ch_iter = 0;
	int ret = 0;
	u8 *num_ports;
	struct codec_port_info (*map)[MAX_PORT][MAX_CH_PER_PORT];
	struct wcd937x_priv *wcd937x = dev_get_drvdata(dev);

	switch (path) {
	case CODEC_RX:
		map = &wcd937x->rx_port_mapping;
		num_ports = &wcd937x->num_rx_ports;
		break;
	case CODEC_TX:
		map = &wcd937x->tx_port_mapping;
		num_ports = &wcd937x->num_tx_ports;
		break;
	}

	if (!of_find_property(dev->of_node, prop,
				&map_size)) {
		dev_err(dev, "missing port mapping prop %s\n", prop);
		goto err_pdata_fail;
	}

	map_length = map_size / (NUM_SWRS_DT_PARAMS * sizeof(u32));

	dt_array = kzalloc(map_size, GFP_KERNEL);

	if (!dt_array) {
		ret = -ENOMEM;
		goto err_pdata_fail;
	}
	ret = of_property_read_u32_array(dev->of_node, prop, dt_array,
				NUM_SWRS_DT_PARAMS * map_length);
	if (ret) {
		dev_err(dev, "%s: Failed to read  port mapping from prop %s\n",
					__func__, prop);
		goto err_pdata_fail;
	}

	for (i = 0; i < map_length; i++) {
		port_num = dt_array[NUM_SWRS_DT_PARAMS * i];
		slave_port_type = dt_array[NUM_SWRS_DT_PARAMS * i + 1];
		ch_mask = dt_array[NUM_SWRS_DT_PARAMS * i + 2];
		ch_rate = dt_array[NUM_SWRS_DT_PARAMS * i + 3];
		master_port_type = dt_array[NUM_SWRS_DT_PARAMS * i + 4];

		if (port_num != old_port_num)
			ch_iter = 0;

		(*map)[port_num][ch_iter].slave_port_type = slave_port_type;
		(*map)[port_num][ch_iter].ch_mask = ch_mask;
		(*map)[port_num][ch_iter].master_port_type = master_port_type;
		(*map)[port_num][ch_iter].num_ch = __sw_hweight8(ch_mask);
		(*map)[port_num][ch_iter++].ch_rate = ch_rate;
		old_port_num = port_num;
	}
	*num_ports = port_num;
	kfree(dt_array);
	return 0;

err_pdata_fail:
	kfree(dt_array);
	return -EINVAL;
}

static int wcd937x_tx_connect_port(struct snd_soc_codec *codec,
					u8 slv_port_type, u8 enable)
{
	struct wcd937x_priv *wcd937x = snd_soc_codec_get_drvdata(codec);
	u8 port_id;
	u8 num_ch;
	u8 ch_mask;
	u32 ch_rate;
	u8 port_type;
	u8 num_port = 1;
	int ret = 0;

	ret = wcd937x_set_port_params(codec, slv_port_type, &port_id,
				&num_ch, &ch_mask, &ch_rate,
				&port_type, CODEC_TX);

	if (ret)
		return ret;

	if (enable)
		ret = swr_connect_port(wcd937x->tx_swr_dev, &port_id,
					num_port, &ch_mask, &ch_rate,
					 &num_ch, &port_type);
	else
		ret = swr_disconnect_port(wcd937x->tx_swr_dev, &port_id,
					num_port, &ch_mask, &port_type);
	return ret;

}
static int wcd937x_rx_connect_port(struct snd_soc_codec *codec,
					u8 slv_port_type, u8 enable)
{
	struct wcd937x_priv *wcd937x = snd_soc_codec_get_drvdata(codec);
	u8 port_id;
	u8 num_ch;
	u8 ch_mask;
	u32 ch_rate;
	u8 port_type;
	u8 num_port = 1;
	int ret = 0;

	ret = wcd937x_set_port_params(codec, slv_port_type, &port_id,
				&num_ch, &ch_mask, &ch_rate,
				&port_type, CODEC_RX);

	if (ret)
		return ret;

	if (enable)
		ret = swr_connect_port(wcd937x->rx_swr_dev, &port_id,
					num_port, &ch_mask, &ch_rate,
					&num_ch, &port_type);
	else
		ret = swr_disconnect_port(wcd937x->rx_swr_dev, &port_id,
					num_port, &ch_mask, &port_type);
	return ret;
}

static int wcd937x_rx_clk_enable(struct snd_soc_codec *codec)
{

	struct wcd937x_priv *wcd937x = snd_soc_codec_get_drvdata(codec);

	if (wcd937x->rx_clk_cnt == 0) {
		snd_soc_update_bits(codec, WCD937X_DIGITAL_CDC_DIG_CLK_CTL,
				    0x08, 0x08);
		snd_soc_update_bits(codec, WCD937X_DIGITAL_CDC_ANA_CLK_CTL,
				    0x01, 0x01);
		snd_soc_update_bits(codec, WCD937X_ANA_RX_SUPPLIES, 0x01, 0x01);
		snd_soc_update_bits(codec, WCD937X_DIGITAL_CDC_RX0_CTL,
				    0x40, 0x00);
		snd_soc_update_bits(codec, WCD937X_DIGITAL_CDC_RX1_CTL,
				    0x40, 0x00);
		snd_soc_update_bits(codec, WCD937X_DIGITAL_CDC_RX2_CTL,
				    0x40, 0x00);
		snd_soc_update_bits(codec, WCD937X_DIGITAL_CDC_ANA_CLK_CTL,
				    0x02, 0x02);
	}
	wcd937x->rx_clk_cnt++;

	return 0;
}

static int wcd937x_rx_clk_disable(struct snd_soc_codec *codec)
{
	struct wcd937x_priv *wcd937x = snd_soc_codec_get_drvdata(codec);

	wcd937x->rx_clk_cnt--;
	if (wcd937x->rx_clk_cnt == 0) {
		snd_soc_update_bits(codec, WCD937X_ANA_RX_SUPPLIES, 0x40, 0x00);
		snd_soc_update_bits(codec, WCD937X_ANA_RX_SUPPLIES, 0x80, 0x00);
		snd_soc_update_bits(codec, WCD937X_ANA_RX_SUPPLIES, 0x01, 0x00);
		snd_soc_update_bits(codec, WCD937X_DIGITAL_CDC_ANA_CLK_CTL,
				    0x02, 0x00);
		snd_soc_update_bits(codec, WCD937X_DIGITAL_CDC_ANA_CLK_CTL,
				    0x01, 0x00);
	}
	return 0;
}

/*
 * wcd937x_soc_get_mbhc: get wcd937x_mbhc handle of corresponding codec
 * @codec: handle to snd_soc_codec *
 *
 * return wcd937x_mbhc handle or error code in case of failure
 */
struct wcd937x_mbhc *wcd937x_soc_get_mbhc(struct snd_soc_codec *codec)
{
	struct wcd937x_priv *wcd937x;

	if (!codec) {
		pr_err("%s: Invalid params, NULL codec\n", __func__);
		return NULL;
	}
	wcd937x = snd_soc_codec_get_drvdata(codec);

	if (!wcd937x) {
		pr_err("%s: Invalid params, NULL tavil\n", __func__);
		return NULL;
	}

	return wcd937x->mbhc;
}
EXPORT_SYMBOL(wcd937x_soc_get_mbhc);

static int wcd937x_codec_hphl_dac_event(struct snd_soc_dapm_widget *w,
					struct snd_kcontrol *kcontrol,
					int event)
{
	struct snd_soc_codec *codec = snd_soc_dapm_to_codec(w->dapm);
	struct wcd937x_priv *wcd937x = snd_soc_codec_get_drvdata(codec);
	int ret = 0;

	dev_dbg(codec->dev, "%s wname: %s event: %d\n", __func__,
		w->name, event);

	switch (event) {
	case SND_SOC_DAPM_PRE_PMU:
		wcd937x_rx_clk_enable(codec);
		snd_soc_update_bits(codec, WCD937X_DIGITAL_CDC_DIG_CLK_CTL,
				    0x01, 0x01);
		snd_soc_update_bits(codec, WCD937X_DIGITAL_CDC_HPH_GAIN_CTL,
				    0x04, 0x04);
		snd_soc_update_bits(codec, WCD937X_HPH_RDAC_CLK_CTL1,
				    0x80, 0x00);
		break;
	case SND_SOC_DAPM_POST_PMU:
		snd_soc_update_bits(codec, WCD937X_HPH_NEW_INT_RDAC_HD2_CTL_L,
				    0x0F, 0x02);
		snd_soc_update_bits(codec, WCD937X_DIGITAL_CDC_COMP_CTL_0,
				    0x02, 0x02);
		usleep_range(5000, 5010);
		snd_soc_update_bits(codec, WCD937X_HPH_NEW_INT_HPH_TIMER1,
				    0x02, 0x00);
		break;
	case SND_SOC_DAPM_POST_PMD:
		ret = swr_slvdev_datapath_control(wcd937x->rx_swr_dev,
		    wcd937x->rx_swr_dev->dev_num,
		    false);
		break;
	}

	return ret;
}

static int wcd937x_codec_hphr_dac_event(struct snd_soc_dapm_widget *w,
					struct snd_kcontrol *kcontrol,
					int event)
{
	struct snd_soc_codec *codec = snd_soc_dapm_to_codec(w->dapm);
	struct wcd937x_priv *wcd937x = snd_soc_codec_get_drvdata(codec);
	int ret = 0;


	dev_dbg(codec->dev, "%s wname: %s event: %d\n", __func__,
		w->name, event);

	switch (event) {
	case SND_SOC_DAPM_PRE_PMU:
		wcd937x_rx_clk_enable(codec);
		snd_soc_update_bits(codec, WCD937X_DIGITAL_CDC_DIG_CLK_CTL,
				    0x02, 0x02);
		snd_soc_update_bits(codec, WCD937X_DIGITAL_CDC_HPH_GAIN_CTL,
				    0x08, 0x08);
		snd_soc_update_bits(codec, WCD937X_HPH_RDAC_CLK_CTL1,
				    0x80, 0x00);
		break;
	case SND_SOC_DAPM_POST_PMU:
		snd_soc_update_bits(codec, WCD937X_HPH_NEW_INT_RDAC_HD2_CTL_R,
				    0x0F, 0x02);
		snd_soc_update_bits(codec, WCD937X_DIGITAL_CDC_COMP_CTL_0,
				    0x01, 0x01);
		usleep_range(5000, 5010);
		snd_soc_update_bits(codec, WCD937X_HPH_NEW_INT_HPH_TIMER1,
				    0x02, 0x00);
		break;
	case SND_SOC_DAPM_POST_PMD:
		ret = swr_slvdev_datapath_control(wcd937x->rx_swr_dev,
		    wcd937x->rx_swr_dev->dev_num,
		    false);
		break;
	}

	return ret;
}

static int wcd937x_codec_ear_dac_event(struct snd_soc_dapm_widget *w,
				       struct snd_kcontrol *kcontrol,
				       int event)
{
	struct snd_soc_codec *codec = snd_soc_dapm_to_codec(w->dapm);
	struct wcd937x_priv *wcd937x = snd_soc_codec_get_drvdata(codec);
	int ret = 0;

	dev_dbg(codec->dev, "%s wname: %s event: %d\n", __func__,
		w->name, event);

	switch (event) {
	case SND_SOC_DAPM_PRE_PMU:
		wcd937x_rx_clk_enable(codec);
		snd_soc_update_bits(codec, WCD937X_DIGITAL_CDC_HPH_GAIN_CTL,
				    0x04, 0x04);
		snd_soc_update_bits(codec, WCD937X_DIGITAL_CDC_DIG_CLK_CTL,
				    0x01, 0x01);
		snd_soc_update_bits(codec, WCD937X_DIGITAL_CDC_COMP_CTL_0,
				    0x02, 0x02);
		usleep_range(5000, 5010);
		break;
	case SND_SOC_DAPM_POST_PMD:
		ret = swr_slvdev_datapath_control(wcd937x->rx_swr_dev,
		    wcd937x->rx_swr_dev->dev_num,
		    false);
		break;
	};
	return ret;

}

static int wcd937x_codec_aux_dac_event(struct snd_soc_dapm_widget *w,
				       struct snd_kcontrol *kcontrol,
				       int event)
{
	struct snd_soc_codec *codec = snd_soc_dapm_to_codec(w->dapm);
	struct wcd937x_priv *wcd937x = snd_soc_codec_get_drvdata(codec);
	int ret = 0;

	dev_dbg(codec->dev, "%s wname: %s event: %d\n", __func__,
		w->name, event);

	switch (event) {
	case SND_SOC_DAPM_PRE_PMU:
		wcd937x_rx_clk_enable(codec);
		snd_soc_update_bits(codec, WCD937X_DIGITAL_CDC_ANA_CLK_CTL,
				    0x04, 0x04);
		snd_soc_update_bits(codec, WCD937X_DIGITAL_CDC_DIG_CLK_CTL,
				    0x04, 0x04);
		snd_soc_update_bits(codec, WCD937X_DIGITAL_CDC_AUX_GAIN_CTL,
				    0x01, 0x01);
		break;
	case SND_SOC_DAPM_POST_PMD:
		ret = swr_slvdev_datapath_control(wcd937x->rx_swr_dev,
		    wcd937x->rx_swr_dev->dev_num,
		    false);
		wcd937x_rx_clk_disable(codec);
		snd_soc_update_bits(codec, WCD937X_DIGITAL_CDC_ANA_CLK_CTL,
				    0x04, 0x00);
		break;
	};
	return ret;

}

static int wcd937x_codec_enable_hphr_pa(struct snd_soc_dapm_widget *w,
					struct snd_kcontrol *kcontrol,
					int event)
{
	struct snd_soc_codec *codec = snd_soc_dapm_to_codec(w->dapm);
	struct wcd937x_priv *wcd937x = snd_soc_codec_get_drvdata(codec);
	int ret = 0;

	dev_dbg(codec->dev, "%s wname: %s event: %d\n", __func__,
		w->name, event);

	switch (event) {
	case SND_SOC_DAPM_PRE_PMU:
		snd_soc_update_bits(codec, WCD937X_ANA_HPH, 0x10, 0x10);
		usleep_range(100, 110);
		break;
	case SND_SOC_DAPM_POST_PMU:
		usleep_range(7000, 7010);
		snd_soc_update_bits(codec, WCD937X_HPH_NEW_INT_HPH_TIMER1,
				    0x02, 0x02);
		snd_soc_update_bits(codec, WCD937X_ANA_RX_SUPPLIES,
				    0x02, 0x02);
		ret = swr_slvdev_datapath_control(wcd937x->rx_swr_dev,
					    wcd937x->rx_swr_dev->dev_num,
					    true);
		break;
	case SND_SOC_DAPM_PRE_PMD:
		blocking_notifier_call_chain(&wcd937x->mbhc->notifier,
					     WCD_EVENT_PRE_HPHR_PA_OFF,
					     &wcd937x->mbhc->wcd_mbhc);
		break;
	case SND_SOC_DAPM_POST_PMD:
		usleep_range(7000, 7010);
		blocking_notifier_call_chain(&wcd937x->mbhc->notifier,
					     WCD_EVENT_POST_HPHR_PA_OFF,
					     &wcd937x->mbhc->wcd_mbhc);
		snd_soc_update_bits(codec, WCD937X_ANA_HPH, 0x10, 0x00);
		break;
	};
	return ret;
}

static int wcd937x_codec_enable_hphl_pa(struct snd_soc_dapm_widget *w,
					struct snd_kcontrol *kcontrol,
					int event)
{
	struct snd_soc_codec *codec = snd_soc_dapm_to_codec(w->dapm);
	struct wcd937x_priv *wcd937x = snd_soc_codec_get_drvdata(codec);
	int ret = 0;

	switch (event) {
	case SND_SOC_DAPM_PRE_PMU:
		snd_soc_update_bits(codec, WCD937X_ANA_HPH, 0x20, 0x20);
		usleep_range(100, 110);
		break;
	case SND_SOC_DAPM_POST_PMU:
		usleep_range(7000, 7010);
		snd_soc_update_bits(codec, WCD937X_HPH_NEW_INT_HPH_TIMER1,
				    0x02, 0x02);
		snd_soc_update_bits(codec, WCD937X_ANA_RX_SUPPLIES,
				    0x02, 0x02);
		ret = swr_slvdev_datapath_control(wcd937x->rx_swr_dev,
				    wcd937x->rx_swr_dev->dev_num,
				    true);
		break;
	case SND_SOC_DAPM_PRE_PMD:
		blocking_notifier_call_chain(&wcd937x->mbhc->notifier,
					     WCD_EVENT_PRE_HPHL_PA_OFF,
					     &wcd937x->mbhc->wcd_mbhc);
		break;
	case SND_SOC_DAPM_POST_PMD:
		usleep_range(7000, 7010);
		blocking_notifier_call_chain(&wcd937x->mbhc->notifier,
					     WCD_EVENT_POST_HPHL_PA_OFF,
					     &wcd937x->mbhc->wcd_mbhc);
		snd_soc_update_bits(codec, WCD937X_ANA_HPH, 0x20, 0x00);
		break;
	};
	return ret;
}

static int wcd937x_codec_enable_aux_pa(struct snd_soc_dapm_widget *w,
				       struct snd_kcontrol *kcontrol,
				       int event)
{
	struct snd_soc_codec *codec = snd_soc_dapm_to_codec(w->dapm);
	struct wcd937x_priv *wcd937x = snd_soc_codec_get_drvdata(codec);
	int ret = 0;

	dev_dbg(codec->dev, "%s wname: %s event: %d\n", __func__,
		w->name, event);

	switch (event) {
	case SND_SOC_DAPM_PRE_PMU:
		snd_soc_update_bits(codec, WCD937X_ANA_RX_SUPPLIES,
				    0x80, 0x80);
		usleep_range(500, 510);
		snd_soc_update_bits(codec, WCD937X_CLASSH_MODE_2, 0xFF, 0x3A);
		usleep_range(500, 510);
		break;
	case SND_SOC_DAPM_POST_PMU:
		usleep_range(1000, 1010);
		snd_soc_update_bits(codec, WCD937X_ANA_RX_SUPPLIES,
				    0x20, 0x20);
		ret = swr_slvdev_datapath_control(wcd937x->rx_swr_dev,
			    wcd937x->rx_swr_dev->dev_num,
			    true);
		break;
	case SND_SOC_DAPM_POST_PMD:
		usleep_range(1000, 1010);
		usleep_range(1000, 1010);
		break;
	};
	return ret;
}

static int wcd937x_codec_enable_ear_pa(struct snd_soc_dapm_widget *w,
				       struct snd_kcontrol *kcontrol,
				       int event)
{
	struct snd_soc_codec *codec = snd_soc_dapm_to_codec(w->dapm);
	struct wcd937x_priv *wcd937x = snd_soc_codec_get_drvdata(codec);
	int ret = 0;

	dev_dbg(codec->dev, "%s wname: %s event: %d\n", __func__,
		w->name, event);

	switch (event) {
	case SND_SOC_DAPM_PRE_PMU:
		snd_soc_update_bits(codec, WCD937X_ANA_RX_SUPPLIES,
				    0x08, 0x08);
		usleep_range(500, 510);
		snd_soc_update_bits(codec, WCD937X_CLASSH_MODE_2, 0xFF, 0x3A);
		usleep_range(500, 510);
		break;
	case SND_SOC_DAPM_POST_PMU:
		usleep_range(6000, 6010);
		snd_soc_update_bits(codec, WCD937X_ANA_RX_SUPPLIES,
				    0x02, 0x02);
		ret = swr_slvdev_datapath_control(wcd937x->rx_swr_dev,
			    wcd937x->rx_swr_dev->dev_num,
			    true);
		break;
	case SND_SOC_DAPM_POST_PMD:
		usleep_range(7000, 7010);
		break;
	};
	return ret;
}

static int wcd937x_enable_rx1(struct snd_soc_dapm_widget *w,
			      struct snd_kcontrol *kcontrol,
			      int event)
{

	struct snd_soc_codec *codec = snd_soc_dapm_to_codec(w->dapm);

	dev_dbg(codec->dev, "%s wname: %s event: %d\n", __func__,
		w->name, event);

	switch (event) {
	case SND_SOC_DAPM_PRE_PMU:
		snd_soc_update_bits(codec, WCD937X_FLYBACK_VNEG_CTRL_4,
				    0xF0, 0x80);
		snd_soc_update_bits(codec, WCD937X_FLYBACK_VNEGDAC_CTRL_2,
				    0xE0, 0xA0);
		snd_soc_update_bits(codec, WCD937X_CLASSH_MODE_3,
				    0x02, 0x02);
		snd_soc_update_bits(codec, WCD937X_CLASSH_MODE_2,
				    0xFF, 0x1C);
		snd_soc_update_bits(codec, WCD937X_ANA_RX_SUPPLIES,
				    0x40, 0x40);
		usleep_range(100, 110);
		snd_soc_update_bits(codec, WCD937X_FLYBACK_VNEGDAC_CTRL_2,
				    0xE0, 0xE0);
		usleep_range(100, 110);
		snd_soc_update_bits(codec, WCD937X_ANA_RX_SUPPLIES,
				    0x80, 0x80);
		usleep_range(500, 510);
		snd_soc_update_bits(codec, WCD937X_CLASSH_MODE_2, 0xFF, 0x3A);
		usleep_range(500, 510);

		wcd937x_rx_connect_port(codec, HPH_L, true);
		wcd937x_rx_connect_port(codec, COMP_L, true);
		break;
	case SND_SOC_DAPM_POST_PMD:
		wcd937x_rx_connect_port(codec, HPH_L, false);
		wcd937x_rx_connect_port(codec, COMP_L, false);
		wcd937x_rx_clk_disable(codec);
		snd_soc_update_bits(codec, WCD937X_DIGITAL_CDC_DIG_CLK_CTL,
				    0x01, 0x00);
		break;
	};
	return 0;
}
static int wcd937x_enable_rx2(struct snd_soc_dapm_widget *w,
			      struct snd_kcontrol *kcontrol, int event)
{
	struct snd_soc_codec *codec = snd_soc_dapm_to_codec(w->dapm);

	dev_dbg(codec->dev, "%s wname: %s event: %d\n", __func__,
		w->name, event);

	switch (event) {
	case SND_SOC_DAPM_PRE_PMU:
		snd_soc_update_bits(codec, WCD937X_FLYBACK_VNEG_CTRL_4,
				    0xF0, 0x80);
		snd_soc_update_bits(codec, WCD937X_FLYBACK_VNEGDAC_CTRL_2,
				    0xE0, 0xA0);
		snd_soc_update_bits(codec, WCD937X_CLASSH_MODE_3, 0x02, 0x02);
		snd_soc_update_bits(codec, WCD937X_CLASSH_MODE_2, 0xFF, 0x1C);
		snd_soc_update_bits(codec, WCD937X_ANA_RX_SUPPLIES,
				    0x40, 0x40);
		usleep_range(100, 110);
		snd_soc_update_bits(codec, WCD937X_FLYBACK_VNEGDAC_CTRL_2,
				    0xE0, 0xE0);
		usleep_range(100, 110);
		snd_soc_update_bits(codec, WCD937X_ANA_RX_SUPPLIES,
				    0x80, 0x80);
		usleep_range(500, 510);
		snd_soc_update_bits(codec, WCD937X_CLASSH_MODE_2, 0xFF, 0x3A);
		usleep_range(500, 510);

		wcd937x_rx_connect_port(codec, HPH_R, true);
		wcd937x_rx_connect_port(codec, COMP_R, true);
		break;
	case SND_SOC_DAPM_POST_PMD:
		wcd937x_rx_connect_port(codec, HPH_R, false);
		wcd937x_rx_connect_port(codec, COMP_R, false);
		wcd937x_rx_clk_disable(codec);
		snd_soc_update_bits(codec, WCD937X_DIGITAL_CDC_DIG_CLK_CTL,
				    0x02, 0x00);
		break;
	};

	return 0;
}

static int wcd937x_enable_rx3(struct snd_soc_dapm_widget *w,
			      struct snd_kcontrol *kcontrol,
			      int event)
{

	struct snd_soc_codec *codec = snd_soc_dapm_to_codec(w->dapm);

	dev_dbg(codec->dev, "%s wname: %s event: %d\n", __func__,
		w->name, event);

	switch (event) {
	case SND_SOC_DAPM_PRE_PMU:
		snd_soc_update_bits(codec, WCD937X_FLYBACK_VNEG_CTRL_2,
				    0xE0, 0xA0);
		snd_soc_update_bits(codec, WCD937X_CLASSH_MODE_3, 0x02, 0x02);
		snd_soc_update_bits(codec, WCD937X_CLASSH_MODE_2, 0xFF, 0x1C);
		snd_soc_update_bits(codec, WCD937X_ANA_RX_SUPPLIES,
				    0x40, 0x40);
		usleep_range(100, 110);
		snd_soc_update_bits(codec, WCD937X_FLYBACK_VNEG_CTRL_2,
				    0xE0, 0xE0);
		usleep_range(100, 110);
		wcd937x_rx_connect_port(codec, LO, true);
		break;
	case SND_SOC_DAPM_POST_PMD:
		wcd937x_rx_connect_port(codec, LO, false);
		usleep_range(6000, 6010);
		wcd937x_rx_clk_disable(codec);
		snd_soc_update_bits(codec, WCD937X_DIGITAL_CDC_DIG_CLK_CTL,
				    0x04, 0x00);
		break;
	}
	return 0;

}

static int wcd937x_codec_enable_dmic(struct snd_soc_dapm_widget *w,
				     struct snd_kcontrol *kcontrol,
				     int event)
{
	struct snd_soc_codec *codec = snd_soc_dapm_to_codec(w->dapm);
	struct wcd937x_priv *wcd937x = snd_soc_codec_get_drvdata(codec);
	u16 dmic_clk_reg;
	s32 *dmic_clk_cnt;
	unsigned int dmic;
	char *wname;
	int ret = 0;

	wname = strpbrk(w->name, "012345");

	if (!wname) {
		dev_err(codec->dev, "%s: widget not found\n", __func__);
		return -EINVAL;
	}

	ret = kstrtouint(wname, 10, &dmic);
	if (ret < 0) {
		dev_err(codec->dev, "%s: Invalid DMIC line on the codec\n",
			__func__);
		return -EINVAL;
	}

	dev_dbg(codec->dev, "%s wname: %s event: %d\n", __func__,
		w->name, event);

	switch (dmic) {
	case 0:
	case 1:
		dmic_clk_cnt = &(wcd937x->dmic_0_1_clk_cnt);
		dmic_clk_reg = WCD937X_DIGITAL_CDC_DMIC0_CTL;
		break;
	case 2:
	case 3:
		dmic_clk_cnt = &(wcd937x->dmic_2_3_clk_cnt);
		dmic_clk_reg = WCD937X_DIGITAL_CDC_DMIC1_CTL;
		break;
	case 4:
	case 5:
		dmic_clk_cnt = &(wcd937x->dmic_4_5_clk_cnt);
		dmic_clk_reg = WCD937X_DIGITAL_CDC_DMIC2_CTL;
		break;
	default:
		dev_err(codec->dev, "%s: Invalid DMIC Selection\n",
			__func__);
		return -EINVAL;
	};
	dev_dbg(codec->dev, "%s: event %d DMIC%d dmic_clk_cnt %d\n",
			__func__, event,  dmic, *dmic_clk_cnt);

	switch (event) {
	case SND_SOC_DAPM_PRE_PMU:
		snd_soc_update_bits(codec, WCD937X_DIGITAL_CDC_DIG_CLK_CTL,
				    0x80, 0x80);
		snd_soc_update_bits(codec, dmic_clk_reg, 0x07, 0x02);
		snd_soc_update_bits(codec, dmic_clk_reg, 0x08, 0x08);
		snd_soc_update_bits(codec, dmic_clk_reg, 0x70, 0x20);
		wcd937x_tx_connect_port(codec, DMIC0 + (w->shift), true);
		break;
	case SND_SOC_DAPM_POST_PMD:
		wcd937x_tx_connect_port(codec, DMIC0 + (w->shift), false);
		break;

	};
	return 0;
}

/*
 * wcd937x_get_micb_vout_ctl_val: converts micbias from volts to register value
 * @micb_mv: micbias in mv
 *
 * return register value converted
 */
int wcd937x_get_micb_vout_ctl_val(u32 micb_mv)
{
	/* min micbias voltage is 1V and maximum is 2.85V */
	if (micb_mv < 1000 || micb_mv > 2850) {
		pr_err("%s: unsupported micbias voltage\n", __func__);
		return -EINVAL;
	}

	return (micb_mv - 1000) / 50;
}
EXPORT_SYMBOL(wcd937x_get_micb_vout_ctl_val);

/*
 * wcd937x_mbhc_micb_adjust_voltage: adjust specific micbias voltage
 * @codec: handle to snd_soc_codec *
 * @req_volt: micbias voltage to be set
 * @micb_num: micbias to be set, e.g. micbias1 or micbias2
 *
 * return 0 if adjustment is success or error code in case of failure
 */
int wcd937x_mbhc_micb_adjust_voltage(struct snd_soc_codec *codec,
				   int req_volt, int micb_num)
{
	struct wcd937x_priv *wcd937x = snd_soc_codec_get_drvdata(codec);
	int cur_vout_ctl, req_vout_ctl;
	int micb_reg, micb_val, micb_en;
	int ret = 0;

	switch (micb_num) {
	case MIC_BIAS_1:
		micb_reg = WCD937X_ANA_MICB1;
		break;
	case MIC_BIAS_2:
		micb_reg = WCD937X_ANA_MICB2;
		break;
	case MIC_BIAS_3:
		micb_reg = WCD937X_ANA_MICB3;
		break;
	default:
		return -EINVAL;
	}
	mutex_lock(&wcd937x->micb_lock);

	/*
	 * If requested micbias voltage is same as current micbias
	 * voltage, then just return. Otherwise, adjust voltage as
	 * per requested value. If micbias is already enabled, then
	 * to avoid slow micbias ramp-up or down enable pull-up
	 * momentarily, change the micbias value and then re-enable
	 * micbias.
	 */
	micb_val = snd_soc_read(codec, micb_reg);
	micb_en = (micb_val & 0xC0) >> 6;
	cur_vout_ctl = micb_val & 0x3F;

	req_vout_ctl = wcd937x_get_micb_vout_ctl_val(req_volt);
	if (req_vout_ctl < 0) {
		ret = -EINVAL;
		goto exit;
	}
	if (cur_vout_ctl == req_vout_ctl) {
		ret = 0;
		goto exit;
	}

	dev_dbg(codec->dev, "%s: micb_num: %d, cur_mv: %d, req_mv: %d, micb_en: %d\n",
		 __func__, micb_num, WCD_VOUT_CTL_TO_MICB(cur_vout_ctl),
		 req_volt, micb_en);

	if (micb_en == 0x1)
		snd_soc_update_bits(codec, micb_reg, 0xC0, 0x80);

	snd_soc_update_bits(codec, micb_reg, 0x3F, req_vout_ctl);

	if (micb_en == 0x1) {
		snd_soc_update_bits(codec, micb_reg, 0xC0, 0x40);
		/*
		 * Add 2ms delay as per HW requirement after enabling
		 * micbias
		 */
		usleep_range(2000, 2100);
	}
exit:
	mutex_unlock(&wcd937x->micb_lock);
	return ret;
}
EXPORT_SYMBOL(wcd937x_mbhc_micb_adjust_voltage);

static int wcd937x_tx_swr_ctrl(struct snd_soc_dapm_widget *w,
				    struct snd_kcontrol *kcontrol,
				    int event)
{
	struct snd_soc_codec *codec = snd_soc_dapm_to_codec(w->dapm);
	struct wcd937x_priv *wcd937x = snd_soc_codec_get_drvdata(codec);
	int ret = 0;

	switch (event) {
	case SND_SOC_DAPM_PRE_PMU:
		ret = swr_slvdev_datapath_control(wcd937x->tx_swr_dev,
		    wcd937x->tx_swr_dev->dev_num,
		    true);
		break;
	case SND_SOC_DAPM_POST_PMD:
		ret = swr_slvdev_datapath_control(wcd937x->tx_swr_dev,
		    wcd937x->tx_swr_dev->dev_num,
		    false);
		break;
	};

	return ret;
}

static int wcd937x_codec_enable_adc(struct snd_soc_dapm_widget *w,
				    struct snd_kcontrol *kcontrol,
				    int event){

	struct snd_soc_codec *codec = snd_soc_dapm_to_codec(w->dapm);

	dev_dbg(codec->dev, "%s wname: %s event: %d\n", __func__,
		w->name, event);

	switch (event) {
	case SND_SOC_DAPM_PRE_PMU:
		snd_soc_update_bits(codec, WCD937X_DIGITAL_CDC_DIG_CLK_CTL,
				    0x80, 0x80);
		snd_soc_update_bits(codec, WCD937X_DIGITAL_CDC_ANA_CLK_CTL,
				    0x08, 0x08);
		snd_soc_update_bits(codec, WCD937X_DIGITAL_CDC_ANA_CLK_CTL,
				    0x10, 0x10);
		wcd937x_tx_connect_port(codec, ADC1 + (w->shift), true);
		break;
	case SND_SOC_DAPM_POST_PMD:
		wcd937x_tx_connect_port(codec, ADC1 + (w->shift), false);
		snd_soc_update_bits(codec, WCD937X_DIGITAL_CDC_ANA_CLK_CTL,
				    0x08, 0x00);
		break;
	};

	return 0;
}

static int wcd937x_enable_req(struct snd_soc_dapm_widget *w,
			      struct snd_kcontrol *kcontrol, int event)
{
	struct snd_soc_codec *codec = snd_soc_dapm_to_codec(w->dapm);

	dev_dbg(codec->dev, "%s wname: %s event: %d\n", __func__,
		w->name, event);

	switch (event) {
	case SND_SOC_DAPM_PRE_PMU:
		snd_soc_update_bits(codec, WCD937X_DIGITAL_CDC_REQ_CTL,
				    0x02, 0x02);
		snd_soc_update_bits(codec, WCD937X_DIGITAL_CDC_REQ_CTL, 0x01,
				    0x00);
		snd_soc_update_bits(codec, WCD937X_ANA_TX_CH2, 0x40, 0x40);
		snd_soc_update_bits(codec, WCD937X_DIGITAL_CDC_DIG_CLK_CTL,
				    0x30, 0x30);
		snd_soc_update_bits(codec, WCD937X_ANA_TX_CH1, 0x80, 0x80);
		snd_soc_update_bits(codec, WCD937X_ANA_TX_CH2, 0x40, 0x00);
		snd_soc_update_bits(codec, WCD937X_ANA_TX_CH2, 0x80, 0x80);
		break;
	case SND_SOC_DAPM_POST_PMD:
		snd_soc_update_bits(codec, WCD937X_ANA_TX_CH1, 0x80, 0x00);
		snd_soc_update_bits(codec, WCD937X_DIGITAL_CDC_DIG_CLK_CTL,
				    0x10, 0x00);
		snd_soc_update_bits(codec, WCD937X_DIGITAL_CDC_ANA_CLK_CTL,
				    0x10, 0x00);
		snd_soc_update_bits(codec, WCD937X_DIGITAL_CDC_DIG_CLK_CTL,
				    0x80, 0x00);
		break;
	};
	return 0;
}

int wcd937x_micbias_control(struct snd_soc_codec *codec,
				int micb_num, int req, bool is_dapm)
{

	struct wcd937x_priv *wcd937x = snd_soc_codec_get_drvdata(codec);
	int micb_index = micb_num - 1;
	u16 micb_reg;
	int pre_off_event = 0, post_off_event = 0;
	int post_on_event = 0, post_dapm_off = 0;
	int post_dapm_on = 0;

	if ((micb_index < 0) || (micb_index > WCD937X_MAX_MICBIAS - 1)) {
		dev_err(codec->dev, "%s: Invalid micbias index, micb_ind:%d\n",
			__func__, micb_index);
		return -EINVAL;
	}
	switch (micb_num) {
	case MIC_BIAS_1:
		micb_reg = WCD937X_ANA_MICB1;
		break;
	case MIC_BIAS_2:
		micb_reg = WCD937X_ANA_MICB2;
		pre_off_event = WCD_EVENT_PRE_MICBIAS_2_OFF;
		post_off_event = WCD_EVENT_POST_MICBIAS_2_OFF;
		post_on_event = WCD_EVENT_POST_MICBIAS_2_ON;
		post_dapm_on = WCD_EVENT_POST_DAPM_MICBIAS_2_ON;
		post_dapm_off = WCD_EVENT_POST_DAPM_MICBIAS_2_OFF;
		break;
	case MIC_BIAS_3:
		micb_reg = WCD937X_ANA_MICB3;
		break;
	default:
		dev_err(codec->dev, "%s: Invalid micbias number: %d\n",
			__func__, micb_num);
		return -EINVAL;
	};
	mutex_lock(&wcd937x->micb_lock);

	switch (req) {
	case MICB_PULLUP_ENABLE:
		wcd937x->pullup_ref[micb_index]++;
		if ((wcd937x->pullup_ref[micb_index] == 1) &&
		    (wcd937x->micb_ref[micb_index] == 0))
			snd_soc_update_bits(codec, micb_reg, 0xC0, 0x80);
		break;
	case MICB_PULLUP_DISABLE:
		if (wcd937x->pullup_ref[micb_index] > 0)
			wcd937x->pullup_ref[micb_index]--;
		if ((wcd937x->pullup_ref[micb_index] == 0) &&
		    (wcd937x->micb_ref[micb_index] == 0))
			snd_soc_update_bits(codec, micb_reg, 0xC0, 0x00);
		break;
	case MICB_ENABLE:
		wcd937x->micb_ref[micb_index]++;
		if (wcd937x->micb_ref[micb_index] == 1) {
			snd_soc_update_bits(codec, WCD937X_DIGITAL_CDC_DIG_CLK_CTL, 0xE0, 0xE0);
			snd_soc_update_bits(codec, WCD937X_DIGITAL_CDC_ANA_CLK_CTL, 0x10, 0x10);
			snd_soc_update_bits(codec, WCD937X_MICB1_TEST_CTL_2, 0x01, 0x01);
			snd_soc_update_bits(codec, WCD937X_MICB2_TEST_CTL_2, 0x01, 0x01);
			snd_soc_update_bits(codec, WCD937X_MICB3_TEST_CTL_2, 0x01, 0x01);
			snd_soc_update_bits(codec, micb_reg, 0xC0, 0x40);
			if (post_on_event && wcd937x->mbhc)
				blocking_notifier_call_chain(
					&wcd937x->mbhc->notifier, post_on_event,
					&wcd937x->mbhc->wcd_mbhc);
		}
		if (is_dapm && post_dapm_on && wcd937x->mbhc)
			blocking_notifier_call_chain(
				&wcd937x->mbhc->notifier, post_dapm_on,
				&wcd937x->mbhc->wcd_mbhc);
		break;
	case MICB_DISABLE:
		if (wcd937x->micb_ref[micb_index] > 0)
			wcd937x->micb_ref[micb_index]--;
		if ((wcd937x->micb_ref[micb_index] == 0) &&
		    (wcd937x->pullup_ref[micb_index] > 0))
			snd_soc_update_bits(codec, micb_reg, 0xC0, 0x80);
		else if ((wcd937x->micb_ref[micb_index] == 0) &&
			 (wcd937x->pullup_ref[micb_index] == 0)) {
			if (pre_off_event && wcd937x->mbhc)
				blocking_notifier_call_chain(
					&wcd937x->mbhc->notifier, pre_off_event,
					&wcd937x->mbhc->wcd_mbhc);
			snd_soc_update_bits(codec, micb_reg, 0xC0, 0x00);
			if (post_off_event && wcd937x->mbhc)
				blocking_notifier_call_chain(
					&wcd937x->mbhc->notifier,
					post_off_event,
					&wcd937x->mbhc->wcd_mbhc);
		}
		if (is_dapm && post_dapm_off && wcd937x->mbhc)
			blocking_notifier_call_chain(
				&wcd937x->mbhc->notifier, post_dapm_off,
				&wcd937x->mbhc->wcd_mbhc);
		break;
	};

	dev_dbg(codec->dev, "%s: micb_num:%d, micb_ref: %d, pullup_ref: %d\n",
		__func__, micb_num, wcd937x->micb_ref[micb_index],
		wcd937x->pullup_ref[micb_index]);
	mutex_unlock(&wcd937x->micb_lock);

	return 0;
}
EXPORT_SYMBOL(wcd937x_micbias_control);

static int __wcd937x_codec_enable_micbias(struct snd_soc_dapm_widget *w,
					  int event)
{
	struct snd_soc_codec *codec = snd_soc_dapm_to_codec(w->dapm);
	int micb_num;

	dev_dbg(codec->dev, "%s: wname: %s, event: %d\n",
		__func__, w->name, event);

	if (strnstr(w->name, "MIC BIAS1", sizeof("MIC BIAS1")))
		micb_num = MIC_BIAS_1;
	else if (strnstr(w->name, "MIC BIAS2", sizeof("MIC BIAS2")))
		micb_num = MIC_BIAS_2;
	else if (strnstr(w->name, "MIC BIAS3", sizeof("MIC BIAS3")))
		micb_num = MIC_BIAS_3;
	else
		return -EINVAL;

	switch (event) {
	case SND_SOC_DAPM_PRE_PMU:
		wcd937x_micbias_control(codec, micb_num, MICB_ENABLE, true);
		break;
	case SND_SOC_DAPM_POST_PMU:
		usleep_range(1000, 1100);
		break;
	case SND_SOC_DAPM_POST_PMD:
		wcd937x_micbias_control(codec, micb_num, MICB_DISABLE, true);
		break;
	};

	return 0;

}

static int wcd937x_codec_enable_micbias(struct snd_soc_dapm_widget *w,
					struct snd_kcontrol *kcontrol,
					int event)
{
	return __wcd937x_codec_enable_micbias(w, event);
}

static int wcd937x_rx_hph_mode_get(struct snd_kcontrol *kcontrol,
				 struct snd_ctl_elem_value *ucontrol)
{
	struct snd_soc_codec *codec = snd_soc_kcontrol_codec(kcontrol);
	struct wcd937x_priv *wcd937x = snd_soc_codec_get_drvdata(codec);

	ucontrol->value.integer.value[0] = wcd937x->hph_mode;
	return 0;
}

static int wcd937x_rx_hph_mode_put(struct snd_kcontrol *kcontrol,
				 struct snd_ctl_elem_value *ucontrol)
{
	struct snd_soc_codec *codec = snd_soc_kcontrol_codec(kcontrol);
	struct wcd937x_priv *wcd937x = snd_soc_codec_get_drvdata(codec);
	u32 mode_val;

	mode_val = ucontrol->value.enumerated.item[0];

	dev_dbg(codec->dev, "%s: mode: %d\n", __func__, mode_val);

	if (mode_val == 0) {
		dev_warn(codec->dev, "%s:Invalid HPH Mode, default to class_AB\n",
			__func__);
		mode_val = 3; /* enum will be updated later */
	}
	wcd937x->hph_mode = mode_val;
	return 0;
}

static const char * const rx_hph_mode_mux_text[] = {
	"CLS_H_INVALID", "CLS_H_HIFI", "CLS_H_LP", "CLS_AB", "CLS_H_LOHIFI",
	"CLS_H_ULP", "CLS_AB_HIFI",
};

static const struct soc_enum rx_hph_mode_mux_enum =
	SOC_ENUM_SINGLE_EXT(ARRAY_SIZE(rx_hph_mode_mux_text),
			    rx_hph_mode_mux_text);

static const struct snd_kcontrol_new wcd937x_snd_controls[] = {
	SOC_ENUM_EXT("RX HPH Mode", rx_hph_mode_mux_enum,
		wcd937x_rx_hph_mode_get, wcd937x_rx_hph_mode_put),

	SOC_SINGLE_TLV("HPHL Volume", WCD937X_HPH_L_EN, 0, 20, 1, line_gain),
	SOC_SINGLE_TLV("HPHR Volume", WCD937X_HPH_R_EN, 0, 20, 1, line_gain),
	SOC_SINGLE_TLV("ADC1 Volume", WCD937X_ANA_TX_CH1, 0, 20, 0, analog_gain),
	SOC_SINGLE_TLV("ADC2 Volume", WCD937X_ANA_TX_CH2, 0, 20, 0, analog_gain),
	SOC_SINGLE_TLV("ADC3 Volume", WCD937X_ANA_TX_CH3, 0, 20, 0, analog_gain),
};

static const struct snd_kcontrol_new adc1_switch[] = {
	SOC_DAPM_SINGLE("Switch", SND_SOC_NOPM, 0, 1, 0)
};

static const struct snd_kcontrol_new adc2_switch[] = {
	SOC_DAPM_SINGLE("Switch", SND_SOC_NOPM, 0, 1, 0)
};

static const struct snd_kcontrol_new adc3_switch[] = {
	SOC_DAPM_SINGLE("Switch", SND_SOC_NOPM, 0, 1, 0)
};

static const struct snd_kcontrol_new dmic1_switch[] = {
	SOC_DAPM_SINGLE("Switch", SND_SOC_NOPM, 0, 1, 0)
};

static const struct snd_kcontrol_new dmic2_switch[] = {
	SOC_DAPM_SINGLE("Switch", SND_SOC_NOPM, 0, 1, 0)
};

static const struct snd_kcontrol_new dmic3_switch[] = {
	SOC_DAPM_SINGLE("Switch", SND_SOC_NOPM, 0, 1, 0)
};

static const struct snd_kcontrol_new dmic4_switch[] = {
	SOC_DAPM_SINGLE("Switch", SND_SOC_NOPM, 0, 1, 0)
};

static const struct snd_kcontrol_new dmic5_switch[] = {
	SOC_DAPM_SINGLE("Switch", SND_SOC_NOPM, 0, 1, 0)
};

static const struct snd_kcontrol_new dmic6_switch[] = {
	SOC_DAPM_SINGLE("Switch", SND_SOC_NOPM, 0, 1, 0)
};

static const struct snd_kcontrol_new ear_rdac_switch[] = {
	SOC_DAPM_SINGLE("Switch", SND_SOC_NOPM, 0, 1, 0)
};

static const struct snd_kcontrol_new aux_rdac_switch[] = {
	SOC_DAPM_SINGLE("Switch", SND_SOC_NOPM, 0, 1, 0)
};

static const struct snd_kcontrol_new hphl_rdac_switch[] = {
	SOC_DAPM_SINGLE("Switch", SND_SOC_NOPM, 0, 1, 0)
};

static const struct snd_kcontrol_new hphr_rdac_switch[] = {
	SOC_DAPM_SINGLE("Switch", SND_SOC_NOPM, 0, 1, 0)
};

static const char * const adc2_mux_text[] = {
	"INP2", "INP3"
};

static const char * const rdac3_mux_text[] = {
	"RX1", "RX3"
};

static const struct soc_enum adc2_enum =
	SOC_ENUM_SINGLE(WCD937X_TX_NEW_TX_CH2_SEL, 7,
		ARRAY_SIZE(adc2_mux_text), adc2_mux_text);


static const struct soc_enum rdac3_enum =
	SOC_ENUM_SINGLE(WCD937X_DIGITAL_CDC_EAR_PATH_CTL, 0,
		ARRAY_SIZE(rdac3_mux_text), rdac3_mux_text);

static const struct snd_kcontrol_new tx_adc2_mux =
	SOC_DAPM_ENUM("ADC2 MUX Mux", adc2_enum);

static const struct snd_kcontrol_new rx_rdac3_mux =
	SOC_DAPM_ENUM("RDAC3_MUX Mux", rdac3_enum);

static const struct snd_soc_dapm_widget wcd937x_dapm_widgets[] = {

	/*input widgets*/

	SND_SOC_DAPM_INPUT("AMIC1"),
	SND_SOC_DAPM_INPUT("AMIC2"),
	SND_SOC_DAPM_INPUT("AMIC3"),
	SND_SOC_DAPM_INPUT("IN1_HPHL"),
	SND_SOC_DAPM_INPUT("IN2_HPHR"),
	SND_SOC_DAPM_INPUT("IN3_AUX"),

	/*tx widgets*/
	SND_SOC_DAPM_ADC_E("ADC1", NULL, SND_SOC_NOPM, 0, 0,
				wcd937x_codec_enable_adc,
				SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMD),
	SND_SOC_DAPM_ADC_E("ADC2", NULL, SND_SOC_NOPM, 1, 0,
				wcd937x_codec_enable_adc,
				SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMD),

	SND_SOC_DAPM_MIXER_E("ADC1 REQ", SND_SOC_NOPM, 0, 0,
				NULL, 0, wcd937x_enable_req,
				SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMD),
	SND_SOC_DAPM_MIXER_E("ADC2 REQ", SND_SOC_NOPM, 0, 0,
				NULL, 0, wcd937x_enable_req,
				SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMD),

	SND_SOC_DAPM_MUX("ADC2 MUX", SND_SOC_NOPM, 0, 0,
				&tx_adc2_mux),

	/*tx mixers*/
	SND_SOC_DAPM_MIXER_E("ADC1_MIXER", SND_SOC_NOPM, 0, 0,
				adc1_switch, ARRAY_SIZE(adc1_switch),
				wcd937x_tx_swr_ctrl, SND_SOC_DAPM_PRE_PMU |
				SND_SOC_DAPM_POST_PMD),
	SND_SOC_DAPM_MIXER_E("ADC2_MIXER", SND_SOC_NOPM, 0, 0,
				adc2_switch, ARRAY_SIZE(adc2_switch),
				wcd937x_tx_swr_ctrl, SND_SOC_DAPM_PRE_PMU |
				SND_SOC_DAPM_POST_PMD),

	/* micbias widgets*/
	SND_SOC_DAPM_MICBIAS_E("MIC BIAS1", SND_SOC_NOPM, 0, 0,
				wcd937x_codec_enable_micbias,
				SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMU |
				SND_SOC_DAPM_POST_PMD),
	SND_SOC_DAPM_MICBIAS_E("MIC BIAS2", SND_SOC_NOPM, 0, 0,
				wcd937x_codec_enable_micbias,
				SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMU |
				SND_SOC_DAPM_POST_PMD),
	SND_SOC_DAPM_MICBIAS_E("MIC BIAS3", SND_SOC_NOPM, 0, 0,
				wcd937x_codec_enable_micbias,
				SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMU |
				SND_SOC_DAPM_POST_PMD),

	/*rx widgets*/
	SND_SOC_DAPM_PGA_E("EAR PGA", WCD937X_ANA_EAR, 7, 0, NULL, 0,
				wcd937x_codec_enable_ear_pa,
				SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMU |
				SND_SOC_DAPM_POST_PMD),
	SND_SOC_DAPM_PGA_E("AUX PGA", WCD937X_AUX_AUXPA, 7, 0, NULL, 0,
				wcd937x_codec_enable_aux_pa,
				SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMU |
				SND_SOC_DAPM_POST_PMD),
	SND_SOC_DAPM_PGA_E("HPHL PGA", WCD937X_ANA_HPH, 7, 0, NULL, 0,
				wcd937x_codec_enable_hphl_pa,
				SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMU |
				SND_SOC_DAPM_PRE_PMD | SND_SOC_DAPM_POST_PMD),
	SND_SOC_DAPM_PGA_E("HPHR PGA", WCD937X_ANA_HPH, 6, 0, NULL, 0,
				wcd937x_codec_enable_hphr_pa,
				SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMU |
				SND_SOC_DAPM_PRE_PMD | SND_SOC_DAPM_POST_PMD),

	SND_SOC_DAPM_DAC_E("RDAC1", NULL, SND_SOC_NOPM, 0, 0,
				wcd937x_codec_hphl_dac_event,
				SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMU |
				SND_SOC_DAPM_PRE_PMD | SND_SOC_DAPM_POST_PMD),
	SND_SOC_DAPM_DAC_E("RDAC2", NULL, SND_SOC_NOPM, 0, 0,
				wcd937x_codec_hphr_dac_event,
				SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMU |
				SND_SOC_DAPM_PRE_PMD | SND_SOC_DAPM_POST_PMD),
	SND_SOC_DAPM_DAC_E("RDAC3", NULL, SND_SOC_NOPM, 0, 0,
				wcd937x_codec_ear_dac_event,
				SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMU |
				SND_SOC_DAPM_PRE_PMD | SND_SOC_DAPM_POST_PMD),
	SND_SOC_DAPM_DAC_E("RDAC4", NULL, SND_SOC_NOPM, 0, 0,
				wcd937x_codec_aux_dac_event,
				SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMU |
				SND_SOC_DAPM_PRE_PMD | SND_SOC_DAPM_POST_PMD),

	SND_SOC_DAPM_MUX("RDAC3_MUX", SND_SOC_NOPM, 0, 0, &rx_rdac3_mux),

	SND_SOC_DAPM_MIXER_E("RX1", SND_SOC_NOPM, 0, 0, NULL, 0,
				wcd937x_enable_rx1, SND_SOC_DAPM_PRE_PMU |
				SND_SOC_DAPM_POST_PMD),
	SND_SOC_DAPM_MIXER_E("RX2", SND_SOC_NOPM, 0, 0, NULL, 0,
				wcd937x_enable_rx2, SND_SOC_DAPM_PRE_PMU |
				SND_SOC_DAPM_POST_PMD),
	SND_SOC_DAPM_MIXER_E("RX3", SND_SOC_NOPM, 0, 0, NULL, 0,
				wcd937x_enable_rx3, SND_SOC_DAPM_PRE_PMU |
				SND_SOC_DAPM_POST_PMD),

	/* rx mixer widgets*/

	SND_SOC_DAPM_MIXER("EAR_RDAC", SND_SOC_NOPM, 0, 0,
			   ear_rdac_switch, ARRAY_SIZE(ear_rdac_switch)),
	SND_SOC_DAPM_MIXER("AUX_RDAC", SND_SOC_NOPM, 0, 0,
			   aux_rdac_switch, ARRAY_SIZE(aux_rdac_switch)),
	SND_SOC_DAPM_MIXER("HPHL_RDAC", SND_SOC_NOPM, 0, 0,
			   hphl_rdac_switch, ARRAY_SIZE(hphl_rdac_switch)),
	SND_SOC_DAPM_MIXER("HPHR_RDAC", SND_SOC_NOPM, 0, 0,
			   hphr_rdac_switch, ARRAY_SIZE(hphr_rdac_switch)),

	/*output widgets tx*/

	SND_SOC_DAPM_OUTPUT("ADC1_OUTPUT"),
	SND_SOC_DAPM_OUTPUT("ADC2_OUTPUT"),

	/*output widgets rx*/
	SND_SOC_DAPM_OUTPUT("EAR"),
	SND_SOC_DAPM_OUTPUT("AUX"),
	SND_SOC_DAPM_OUTPUT("HPHL"),
	SND_SOC_DAPM_OUTPUT("HPHR"),

};

static const struct snd_soc_dapm_widget wcd9375_dapm_widgets[] = {

	/*input widgets*/
	SND_SOC_DAPM_INPUT("AMIC4"),

	/*tx widgets*/
	SND_SOC_DAPM_ADC_E("ADC3", NULL, SND_SOC_NOPM, 2, 0,
				wcd937x_codec_enable_adc,
				SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMD),

	SND_SOC_DAPM_MIXER_E("ADC3 REQ", SND_SOC_NOPM, 0, 0,
				NULL, 0, wcd937x_enable_req,
				SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMD),

	SND_SOC_DAPM_ADC_E("DMIC1", NULL, SND_SOC_NOPM, 0, 0,
				wcd937x_codec_enable_dmic,
				SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMD),
	SND_SOC_DAPM_ADC_E("DMIC2", NULL, SND_SOC_NOPM, 1, 0,
				wcd937x_codec_enable_dmic,
				SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMD),
	SND_SOC_DAPM_ADC_E("DMIC3", NULL, SND_SOC_NOPM, 2, 0,
				wcd937x_codec_enable_dmic,
				SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMD),
	SND_SOC_DAPM_ADC_E("DMIC4", NULL, SND_SOC_NOPM, 3, 0,
				wcd937x_codec_enable_dmic,
				SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMD),
	SND_SOC_DAPM_ADC_E("DMIC5", NULL, SND_SOC_NOPM, 4, 0,
				wcd937x_codec_enable_dmic,
				SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMD),
	SND_SOC_DAPM_ADC_E("DMIC6", NULL, SND_SOC_NOPM, 5, 0,
				wcd937x_codec_enable_dmic,
				SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMD),

	/*tx mixer widgets*/
	SND_SOC_DAPM_MIXER_E("DMIC1_MIXER", SND_SOC_NOPM, 0,
				0, dmic1_switch, ARRAY_SIZE(dmic1_switch),
				wcd937x_tx_swr_ctrl, SND_SOC_DAPM_PRE_PMU |
				SND_SOC_DAPM_POST_PMD),
	SND_SOC_DAPM_MIXER_E("DMIC2_MIXER", SND_SOC_NOPM, 0,
				0, dmic2_switch, ARRAY_SIZE(dmic2_switch),
				wcd937x_tx_swr_ctrl, SND_SOC_DAPM_PRE_PMU |
				SND_SOC_DAPM_POST_PMD),
	SND_SOC_DAPM_MIXER_E("DMIC3_MIXER", SND_SOC_NOPM, 0,
				0, dmic3_switch, ARRAY_SIZE(dmic3_switch),
				wcd937x_tx_swr_ctrl, SND_SOC_DAPM_PRE_PMU |
				SND_SOC_DAPM_POST_PMD),
	SND_SOC_DAPM_MIXER_E("DMIC4_MIXER", SND_SOC_NOPM, 0,
				0, dmic4_switch, ARRAY_SIZE(dmic4_switch),
				wcd937x_tx_swr_ctrl, SND_SOC_DAPM_PRE_PMU |
				SND_SOC_DAPM_POST_PMD),
	SND_SOC_DAPM_MIXER_E("DMIC5_MIXER", SND_SOC_NOPM, 0,
				0, dmic5_switch, ARRAY_SIZE(dmic5_switch),
				wcd937x_tx_swr_ctrl, SND_SOC_DAPM_PRE_PMU |
				SND_SOC_DAPM_POST_PMD),
	SND_SOC_DAPM_MIXER_E("DMIC6_MIXER", SND_SOC_NOPM, 0,
				0, dmic6_switch, ARRAY_SIZE(dmic6_switch),
				wcd937x_tx_swr_ctrl, SND_SOC_DAPM_PRE_PMU |
				SND_SOC_DAPM_POST_PMD),
	SND_SOC_DAPM_MIXER_E("ADC3_MIXER", SND_SOC_NOPM, 0, 0, adc3_switch,
				ARRAY_SIZE(adc3_switch), wcd937x_tx_swr_ctrl,
				SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMD),

	/*output widgets*/
	SND_SOC_DAPM_OUTPUT("DMIC1_OUTPUT"),
	SND_SOC_DAPM_OUTPUT("DMIC2_OUTPUT"),
	SND_SOC_DAPM_OUTPUT("DMIC3_OUTPUT"),
	SND_SOC_DAPM_OUTPUT("DMIC4_OUTPUT"),
	SND_SOC_DAPM_OUTPUT("DMIC5_OUTPUT"),
	SND_SOC_DAPM_OUTPUT("DMIC6_OUTPUT"),
	SND_SOC_DAPM_OUTPUT("ADC3_OUTPUT"),

};

static const struct snd_soc_dapm_route wcd937x_audio_map[] = {

	{"ADC1_OUTPUT", NULL, "ADC1_MIXER"},
	{"ADC1_MIXER", "Switch", "ADC1 REQ"},
	{"ADC1 REQ", NULL, "ADC1"},
	{"ADC1", NULL, "AMIC1"},

	{"ADC2_OUTPUT", NULL, "ADC2_MIXER"},
	{"ADC2_MIXER", "Switch", "ADC2 REQ"},
	{"ADC2 REQ", NULL, "ADC2"},
	{"ADC2", NULL, "ADC2 MUX"},
	{"ADC2 MUX", "INP3", "AMIC3"},
	{"ADC2 MUX", "INP2", "AMIC2"},

	{"RX1", NULL, "IN1_HPHL"},
	{"RDAC1", NULL, "RX1"},
	{"HPHL_RDAC", "Switch", "RDAC1"},
	{"HPHL PGA", NULL, "HPHL_RDAC"},
	{"HPHL", NULL, "HPHL PGA"},

	{"RX2", NULL, "IN2_HPHR"},
	{"RDAC2", NULL, "RX2"},
	{"HPHR_RDAC", "Switch", "RDAC2"},
	{"HPHR PGA", NULL, "HPHR_RDAC"},
	{"HPHR", NULL, "HPHR PGA"},

	{"RX3", NULL, "IN3_AUX"},
	{"RDAC4", NULL, "RX3"},
	{"AUX_RDAC", "Switch", "RDAC4"},
	{"AUX PGA", NULL, "AUX_RDAC"},
	{"AUX", NULL, "AUX PGA"},

	{"RDAC3_MUX", "RX3", "RX3"},
	{"RDAC3_MUX", "RX1", "RX1"},
	{"RDAC3", NULL, "RDAC3_MUX"},
	{"EAR_RDAC", "Switch", "RDAC3"},
	{"EAR PGA", NULL, "EAR_RDAC"},
	{"EAR", NULL, "EAR PGA"},

};

static const struct snd_soc_dapm_route wcd9375_audio_map[] = {

	{"ADC3_OUTPUT", NULL, "ADC3_MIXER"},
	{"ADC3_MIXER", "Switch", "ADC3 REQ"},
	{"ADC3 REQ", NULL, "ADC3"},
	{"ADC3", NULL, "AMIC4"},

	{"DMIC1_OUTPUT", NULL, "DMIC1_MIXER"},
	{"DMIC1_MIXER", "Switch", "DMIC1"},

	{"DMIC2_OUTPUT", NULL, "DMIC2_MIXER"},
	{"DMIC2_MIXER", "Switch", "DMIC2"},

	{"DMIC3_OUTPUT", NULL, "DMIC3_MIXER"},
	{"DMIC3_MIXER", "Switch", "DMIC3"},

	{"DMIC4_OUTPUT", NULL, "DMIC4_MIXER"},
	{"DMIC4_MIXER", "Switch", "DMIC4"},

	{"DMIC5_OUTPUT", NULL, "DMIC5_MIXER"},
	{"DMIC5_MIXER", "Switch", "DMIC5"},

	{"DMIC6_OUTPUT", NULL, "DMIC6_MIXER"},
	{"DMIC6_MIXER", "Switch", "DMIC6"},

};

static ssize_t wcd937x_version_read(struct snd_info_entry *entry,
				   void *file_private_data,
				   struct file *file,
				   char __user *buf, size_t count,
				   loff_t pos)
{
	struct wcd937x_priv *priv;
	char buffer[WCD937X_VERSION_ENTRY_SIZE];
	int len = 0;

	priv = (struct wcd937x_priv *) entry->private_data;
	if (!priv) {
		pr_err("%s: wcd937x priv is null\n", __func__);
		return -EINVAL;
	}

	switch (priv->version) {
	case WCD937X_VERSION_1_0:
		len = snprintf(buffer, sizeof(buffer), "WCD937X_1_0\n");
		break;
	default:
		len = snprintf(buffer, sizeof(buffer), "VER_UNDEFINED\n");
	}

	return simple_read_from_buffer(buf, count, &pos, buffer, len);
}

static struct snd_info_entry_ops wcd937x_info_ops = {
	.read = wcd937x_version_read,
};

/*
 * wcd937x_info_create_codec_entry - creates wcd937x module
 * @codec_root: The parent directory
 * @codec: Codec instance
 *
 * Creates wcd937x module and version entry under the given
 * parent directory.
 *
 * Return: 0 on success or negative error code on failure.
 */
int wcd937x_info_create_codec_entry(struct snd_info_entry *codec_root,
				   struct snd_soc_codec *codec)
{
	struct snd_info_entry *version_entry;
	struct wcd937x_priv *priv;
	struct snd_soc_card *card;

	if (!codec_root || !codec)
		return -EINVAL;

	priv = snd_soc_codec_get_drvdata(codec);
	if (priv->entry) {
		dev_dbg(priv->dev,
			"%s:wcd937x module already created\n", __func__);
		return 0;
	}
	card = codec->component.card;
	priv->entry = snd_info_create_subdir(codec_root->module,
					     "wcd937x", codec_root);
	if (!priv->entry) {
		dev_dbg(codec->dev, "%s: failed to create wcd937x entry\n",
			__func__);
		return -ENOMEM;
	}
	version_entry = snd_info_create_card_entry(card->snd_card,
						   "version",
						   priv->entry);
	if (!version_entry) {
		dev_dbg(codec->dev, "%s: failed to create wcd937x version entry\n",
			__func__);
		return -ENOMEM;
	}

	version_entry->private_data = priv;
	version_entry->size = WCD937X_VERSION_ENTRY_SIZE;
	version_entry->content = SNDRV_INFO_CONTENT_DATA;
	version_entry->c.ops = &wcd937x_info_ops;

	if (snd_info_register(version_entry) < 0) {
		snd_info_free_entry(version_entry);
		return -ENOMEM;
	}
	priv->version_entry = version_entry;

	return 0;
}
EXPORT_SYMBOL(wcd937x_info_create_codec_entry);

static int wcd937x_soc_codec_probe(struct snd_soc_codec *codec)
{
	struct wcd937x_priv *wcd937x = snd_soc_codec_get_drvdata(codec);
	struct snd_soc_dapm_context *dapm = snd_soc_codec_get_dapm(codec);
	int variant;
	int ret = -EINVAL;

	dev_info(codec->dev, "%s()\n", __func__);
	wcd937x = snd_soc_codec_get_drvdata(codec);

	if (!wcd937x)
		return -EINVAL;

	wcd937x->codec = codec;

	variant = (snd_soc_read(codec, WCD937X_DIGITAL_EFUSE_REG_0) & 0x0E) >> 1;
	wcd937x->variant = variant;

	wcd937x->fw_data = devm_kzalloc(codec->dev,
					sizeof(*(wcd937x->fw_data)),
					GFP_KERNEL);
	if (!wcd937x->fw_data) {
		dev_err(codec->dev, "Failed to allocate fw_data\n");
		ret = -ENOMEM;
		goto err;
	}

	set_bit(WCD9XXX_MBHC_CAL, wcd937x->fw_data->cal_bit);
	ret = wcd_cal_create_hwdep(wcd937x->fw_data,
				   WCD9XXX_CODEC_HWDEP_NODE, codec);

	if (ret < 0) {
		dev_err(codec->dev, "%s hwdep failed %d\n", __func__, ret);
		goto err_hwdep;
	}

	ret = wcd937x_mbhc_init(&wcd937x->mbhc, codec, wcd937x->fw_data);
	if (ret) {
		pr_err("%s: mbhc initialization failed\n", __func__);
		goto err_hwdep;
	}

	wcd937x_init_reg(codec);

	if (wcd937x->variant == WCD9375_VARIANT) {
		ret = snd_soc_dapm_new_controls(dapm, wcd9375_dapm_widgets,
					ARRAY_SIZE(wcd9375_dapm_widgets));
		if (ret < 0) {
			dev_err(codec->dev, "%s: Failed to add snd_ctls\n",
				__func__);
			goto err_hwdep;
		}
		ret = snd_soc_dapm_add_routes(dapm, wcd9375_audio_map,
					ARRAY_SIZE(wcd9375_audio_map));
		if (ret < 0) {
			dev_err(codec->dev, "%s: Failed to add routes\n",
				__func__);
			goto err_hwdep;
		}
		snd_soc_dapm_sync(dapm);
	}
	wcd937x->version = WCD937X_VERSION_1_0;
	return ret;

err_hwdep:
	wcd937x->fw_data = NULL;

err:
	return ret;
}

static int wcd937x_soc_codec_remove(struct snd_soc_codec *codec)
{
	struct wcd937x_priv *wcd937x = snd_soc_codec_get_drvdata(codec);

	if (!wcd937x)
		return -EINVAL;

	return 0;
}

static struct regmap *wcd937x_get_regmap(struct device *dev)
{
	struct wcd937x_priv *wcd937x = dev_get_drvdata(dev);

	return wcd937x->regmap;
}

static struct snd_soc_codec_driver soc_codec_dev_wcd937x = {
	.probe = wcd937x_soc_codec_probe,
	.remove = wcd937x_soc_codec_remove,
	.get_regmap = wcd937x_get_regmap,
	.component_driver = {
		.controls = wcd937x_snd_controls,
		.num_controls = ARRAY_SIZE(wcd937x_snd_controls),
		.dapm_widgets = wcd937x_dapm_widgets,
		.num_dapm_widgets = ARRAY_SIZE(wcd937x_dapm_widgets),
		.dapm_routes = wcd937x_audio_map,
		.num_dapm_routes = ARRAY_SIZE(wcd937x_audio_map),
	},
};

int wcd937x_reset(struct device *dev)
{
	struct wcd937x_priv *wcd937x = NULL;
	int rc = 0;
	int value = 0;

	if (!dev)
		return -ENODEV;

	wcd937x = dev_get_drvdata(dev);
	if (!wcd937x)
		return -EINVAL;

	if (!wcd937x->rst_np) {
		dev_err(dev, "%s: reset gpio device node not specified\n",
				__func__);
		return -EINVAL;
	}

	value = msm_cdc_pinctrl_get_state(wcd937x->rst_np);
	if (value > 0)
		return 0;

	rc = msm_cdc_pinctrl_select_sleep_state(wcd937x->rst_np);
	if (rc) {
		dev_err(dev, "%s: wcd sleep state request fail!\n",
				__func__);
		return rc;
	}
	/* 20ms sleep required after pulling the reset gpio to LOW */
	usleep_range(20, 30);

	rc = msm_cdc_pinctrl_select_active_state(wcd937x->rst_np);
	if (rc) {
		dev_err(dev, "%s: wcd active state request fail!\n",
				__func__);
		return rc;
	}
	/* 20ms sleep required after pulling the reset gpio to HIGH */
	usleep_range(20, 30);

	return rc;
}

static int wcd937x_read_of_property_u32(struct device *dev, const char *name,
					u32 *val)
{
	int rc = 0;

	rc = of_property_read_u32(dev->of_node, name, val);
	if (rc)
		dev_err(dev, "%s: Looking up %s property in node %s failed\n",
			__func__, name, dev->of_node->full_name);

	return rc;
}

static void wcd937x_dt_parse_micbias_info(struct device *dev,
					  struct wcd937x_micbias_setting *mb)
{
	u32 prop_val = 0;
	int rc = 0;

	/* MB1 */
	if (of_find_property(dev->of_node, "qcom,cdc-micbias1-mv",
				    NULL)) {
		rc = wcd937x_read_of_property_u32(dev,
						  "qcom,cdc-micbias1-mv",
						  &prop_val);
		if (!rc)
			mb->micb1_mv = prop_val;
	} else {
		dev_info(dev, "%s: Micbias1 DT property not found\n",
			__func__);
	}

	/* MB2 */
	if (of_find_property(dev->of_node, "qcom,cdc-micbias2-mv",
				    NULL)) {
		rc = wcd937x_read_of_property_u32(dev,
						  "qcom,cdc-micbias2-mv",
						  &prop_val);
		if (!rc)
			mb->micb2_mv = prop_val;
	} else {
		dev_info(dev, "%s: Micbias2 DT property not found\n",
			__func__);
	}

	/* MB3 */
	if (of_find_property(dev->of_node, "qcom,cdc-micbias3-mv",
				    NULL)) {
		rc = wcd937x_read_of_property_u32(dev,
						  "qcom,cdc-micbias3-mv",
						  &prop_val);
		if (!rc)
			mb->micb3_mv = prop_val;
	} else {
		dev_info(dev, "%s: Micbias3 DT property not found\n",
			__func__);
	}
}

struct wcd937x_pdata *wcd937x_populate_dt_data(struct device *dev)
{
	struct wcd937x_pdata *pdata = NULL;

	pdata = devm_kzalloc(dev, sizeof(struct wcd937x_pdata),
				GFP_KERNEL);
	if (!pdata)
		return NULL;

	pdata->rst_np = of_parse_phandle(dev->of_node,
			"qcom,wcd-rst-gpio-node", 0);

	if (!pdata->rst_np) {
		dev_err(dev, "%s: Looking up %s property in node %s failed\n",
				__func__, "qcom,wcd-rst-gpio-node",
				dev->of_node->full_name);
		return NULL;
	}

	/* Parse power supplies */
	msm_cdc_get_power_supplies(dev, &pdata->regulator,
				   &pdata->num_supplies);
	if (!pdata->regulator || (pdata->num_supplies <= 0)) {
		dev_err(dev, "%s: no power supplies defined for codec\n",
			__func__);
		return NULL;
	}

	pdata->rx_slave = of_parse_phandle(dev->of_node, "qcom,rx-slave", 0);
	pdata->tx_slave = of_parse_phandle(dev->of_node, "qcom,tx-slave", 0);
	wcd937x_dt_parse_micbias_info(dev, &pdata->micbias);

	return pdata;
}

static int wcd937x_bind(struct device *dev)
{
	int ret = 0, i = 0;
	struct wcd937x_priv *wcd937x = NULL;
	struct wcd937x_pdata *pdata = NULL;

	wcd937x = devm_kzalloc(dev, sizeof(struct wcd937x_priv), GFP_KERNEL);
	if (!wcd937x)
		return -ENOMEM;

	dev_set_drvdata(dev, wcd937x);

	pdata = wcd937x_populate_dt_data(dev);
	if (!pdata) {
		dev_err(dev, "%s: Fail to obtain platform data\n", __func__);
		return -EINVAL;
	}
	wcd937x->dev = dev;
	wcd937x->dev->platform_data = pdata;
	wcd937x->rst_np = pdata->rst_np;
	ret = msm_cdc_init_supplies(dev, &wcd937x->supplies,
				    pdata->regulator, pdata->num_supplies);
	if (!wcd937x->supplies) {
		dev_err(dev, "%s: Cannot init wcd supplies\n",
			__func__);
		return ret;
	}

	ret = msm_cdc_enable_static_supplies(dev, wcd937x->supplies,
					     pdata->regulator,
					     pdata->num_supplies);
	if (ret) {
		dev_err(dev, "%s: wcd static supply enable failed!\n",
			__func__);
		return ret;
	}

	wcd937x_reset(dev);
	/*
	 * Add 5msec delay to provide sufficient time for
	 * soundwire auto enumeration of slave devices as
	 * as per HW requirement.
	 */
	usleep_range(5000, 5010);

	ret = component_bind_all(dev, wcd937x);
	if (ret) {
		dev_err(dev, "%s: Slave bind failed, ret = %d\n",
			__func__, ret);
		return ret;
	}

	ret = wcd937x_parse_port_mapping(dev, "qcom,rx_swr_ch_map", CODEC_RX);
	ret |= wcd937x_parse_port_mapping(dev, "qcom,tx_swr_ch_map", CODEC_TX);

	if (ret) {
		dev_err(dev, "Failed to read port mapping\n");
		goto err;
	}

	wcd937x->rx_swr_dev = get_matching_swr_slave_device(pdata->rx_slave);
	if (!wcd937x->rx_swr_dev) {
		dev_err(dev, "%s: Could not find RX swr slave device\n",
			 __func__);
		ret = -ENODEV;
		goto err;
	}

	wcd937x->tx_swr_dev = get_matching_swr_slave_device(pdata->tx_slave);
	if (!wcd937x->tx_swr_dev) {
		dev_err(dev, "%s: Could not find TX swr slave device\n",
			__func__);
		ret = -ENODEV;
		goto err;
	}

	wcd937x->regmap = devm_regmap_init_swr(wcd937x->tx_swr_dev,
					       &wcd937x_regmap_config);
	if (!wcd937x->regmap) {
		dev_err(dev, "%s: Regmap init failed\n",
				__func__);
		goto err;
	}

	/* Set all interupts as edge triggered */
	for (i = 0; i < wcd937x_regmap_irq_chip.num_regs; i++)
		regmap_write(wcd937x->regmap,
			     (WCD937X_DIGITAL_INTR_LEVEL_0 + i), 0);

	wcd937x_regmap_irq_chip.irq_drv_data = wcd937x;
	wcd937x->irq_info.wcd_regmap_irq_chip = &wcd937x_regmap_irq_chip;
	wcd937x->irq_info.codec_name = "WCD937X";
	wcd937x->irq_info.regmap = wcd937x->regmap;
	wcd937x->irq_info.dev = dev;
	ret = wcd_irq_init(&wcd937x->irq_info, &wcd937x->virq);

	if (ret) {
		dev_err(dev, "%s: IRQ init failed: %d\n",
			__func__, ret);
		goto err;
	}
	wcd937x->tx_swr_dev->slave_irq = wcd937x->virq;

	ret = snd_soc_register_codec(dev, &soc_codec_dev_wcd937x,
				     NULL, 0);
	if (ret) {
		dev_err(dev, "%s: Codec registration failed\n",
				__func__);
		goto err_irq;
	}

	return ret;
err_irq:
	wcd_irq_exit(&wcd937x->irq_info, wcd937x->virq);
err:
	component_unbind_all(dev, wcd937x);
	return ret;
}

static void wcd937x_unbind(struct device *dev)
{
	struct wcd937x_priv *wcd937x = dev_get_drvdata(dev);

	wcd_irq_exit(&wcd937x->irq_info, wcd937x->virq);
	snd_soc_unregister_codec(dev);
	component_unbind_all(dev, wcd937x);
}

static const struct of_device_id wcd937x_dt_match[] = {
	{ .compatible = "qcom,wcd937x-codec" },
	{}
};

static const struct component_master_ops wcd937x_comp_ops = {
	.bind   = wcd937x_bind,
	.unbind = wcd937x_unbind,
};

static int wcd937x_compare_of(struct device *dev, void *data)
{
	return dev->of_node == data;
}

static void wcd937x_release_of(struct device *dev, void *data)
{
	of_node_put(data);
}

static int wcd937x_add_slave_components(struct device *dev,
				struct component_match **matchptr)
{
	struct device_node *np, *rx_node, *tx_node;

	np = dev->of_node;

	rx_node = of_parse_phandle(np, "qcom,rx-slave", 0);
	if (!rx_node) {
		dev_err(dev, "%s: Rx-slave node not defined\n", __func__);
		return -ENODEV;
	}
	of_node_get(rx_node);
	component_match_add_release(dev, matchptr,
			wcd937x_release_of,
			wcd937x_compare_of,
			rx_node);

	tx_node = of_parse_phandle(np, "qcom,tx-slave", 0);
	if (!tx_node) {
		dev_err(dev, "%s: Tx-slave node not defined\n", __func__);
			return -ENODEV;
	}
	of_node_get(tx_node);
	component_match_add_release(dev, matchptr,
			wcd937x_release_of,
			wcd937x_compare_of,
			tx_node);
	return 0;
}

static int wcd937x_probe(struct platform_device *pdev)
{
	struct component_match *match = NULL;
	int ret;

	ret = wcd937x_add_slave_components(&pdev->dev, &match);
	if (ret)
		return ret;

	return component_master_add_with_match(&pdev->dev,
					&wcd937x_comp_ops, match);
}

static int wcd937x_remove(struct platform_device *pdev)
{
	component_master_del(&pdev->dev, &wcd937x_comp_ops);
	return 0;
}

static struct platform_driver wcd937x_codec_driver = {
	.probe = wcd937x_probe,
	.remove = wcd937x_remove,
	.driver = {
		.name = "wcd937x_codec",
		.owner = THIS_MODULE,
		.of_match_table = of_match_ptr(wcd937x_dt_match),
	},
};

module_platform_driver(wcd937x_codec_driver);
MODULE_DESCRIPTION("WCD937X Codec driver");
MODULE_LICENSE("GPL v2");