// SPDX-License-Identifier: GPL-2.0-only
//
// aw88081.c  --  AW88081 ALSA SoC Audio driver
//
// Copyright (c) 2024 awinic Technology CO., LTD
//
// Author: Weidong Wang <wangweidong.a@awinic.com>
//

#include <linux/firmware.h>
#include <linux/i2c.h>
#include <linux/regmap.h>
#include <sound/soc.h>
#include "aw88081.h"
#include "aw88395/aw88395_device.h"

enum aw8808x_type {
	AW88081,
	AW88083,
};

struct aw88081 {
	struct aw_device *aw_pa;
	struct mutex lock;
	struct delayed_work start_work;
	struct regmap *regmap;
	struct aw_container *aw_cfg;
	enum aw8808x_type devtype;
	bool phase_sync;
};

static const struct regmap_config aw88081_regmap_config = {
	.val_bits = 16,
	.reg_bits = 8,
	.max_register = AW88081_REG_MAX,
	.reg_format_endian = REGMAP_ENDIAN_LITTLE,
	.val_format_endian = REGMAP_ENDIAN_BIG,
};

static const struct regmap_config aw88083_regmap_config = {
	.val_bits = 16,
	.reg_bits = 8,
	.max_register = AW88083_REG_MAX,
	.reg_format_endian = REGMAP_ENDIAN_LITTLE,
	.val_format_endian = REGMAP_ENDIAN_BIG,
};

static int aw88081_dev_get_iis_status(struct aw_device *aw_dev)
{
	unsigned int reg_val;
	int ret;

	ret = regmap_read(aw_dev->regmap, AW88081_SYSST_REG, &reg_val);
	if (ret)
		return ret;
	if ((reg_val & AW88081_BIT_PLL_CHECK) != AW88081_BIT_PLL_CHECK) {
		dev_err(aw_dev->dev, "check pll lock fail,reg_val:0x%04x", reg_val);
		return -EINVAL;
	}

	return 0;
}

static int aw88081_dev_check_mode1_pll(struct aw_device *aw_dev)
{
	int ret, i;

	for (i = 0; i < AW88081_DEV_SYSST_CHECK_MAX; i++) {
		ret = aw88081_dev_get_iis_status(aw_dev);
		if (ret) {
			dev_err(aw_dev->dev, "mode1 iis signal check error");
			usleep_range(AW88081_2000_US, AW88081_2000_US + 10);
		} else {
			return 0;
		}
	}

	return -EPERM;
}

static int aw88081_dev_check_mode2_pll(struct aw_device *aw_dev)
{
	unsigned int reg_val;
	int ret, i;

	ret = regmap_read(aw_dev->regmap, AW88081_PLLCTRL1_REG, &reg_val);
	if (ret)
		return ret;

	reg_val &= (~AW88081_CCO_MUX_MASK);
	if (reg_val == AW88081_CCO_MUX_DIVIDED_VALUE) {
		dev_dbg(aw_dev->dev, "CCO_MUX is already divider");
		return -EPERM;
	}

	/* change mode2 */
	ret = regmap_update_bits(aw_dev->regmap, AW88081_PLLCTRL1_REG,
			~AW88081_CCO_MUX_MASK, AW88081_CCO_MUX_DIVIDED_VALUE);
	if (ret)
		return ret;

	for (i = 0; i < AW88081_DEV_SYSST_CHECK_MAX; i++) {
		ret = aw88081_dev_get_iis_status(aw_dev);
		if (ret) {
			dev_err(aw_dev->dev, "mode2 iis check error");
			usleep_range(AW88081_2000_US, AW88081_2000_US + 10);
		} else {
			break;
		}
	}

	/* change mode1 */
	ret = regmap_update_bits(aw_dev->regmap, AW88081_PLLCTRL1_REG,
			~AW88081_CCO_MUX_MASK, AW88081_CCO_MUX_BYPASS_VALUE);
	if (ret == 0) {
		usleep_range(AW88081_2000_US, AW88081_2000_US + 10);
		for (i = 0; i < AW88081_DEV_SYSST_CHECK_MAX; i++) {
			ret = aw88081_dev_check_mode1_pll(aw_dev);
			if (ret) {
				dev_err(aw_dev->dev, "mode2 switch to mode1, iis check error");
				usleep_range(AW88081_2000_US, AW88081_2000_US + 10);
			} else {
				break;
			}
		}
	}

	return ret;
}

static int aw88081_dev_check_syspll(struct aw_device *aw_dev)
{
	int ret;

	ret = aw88081_dev_check_mode1_pll(aw_dev);
	if (ret) {
		dev_dbg(aw_dev->dev, "mode1 check iis failed try switch to mode2 check");
		ret = aw88081_dev_check_mode2_pll(aw_dev);
		if (ret) {
			dev_err(aw_dev->dev, "mode2 check iis failed");
			return ret;
		}
	}

	return 0;
}

static int aw88081_dev_check_sysst(struct aw_device *aw_dev)
{
	unsigned int check_val;
	unsigned int reg_val;
	unsigned int value;
	int ret, i;

	ret = regmap_read(aw_dev->regmap, AW88081_PWMCTRL4_REG, &reg_val);
	if (ret)
		return ret;

	if (reg_val & (~AW88081_NOISE_GATE_EN_MASK))
		check_val = AW88081_NO_SWS_SYSST_CHECK;
	else
		check_val = AW88081_SWS_SYSST_CHECK;

	for (i = 0; i < AW88081_DEV_SYSST_CHECK_MAX; i++) {
		ret = regmap_read(aw_dev->regmap, AW88081_SYSST_REG, &reg_val);
		if (ret)
			return ret;

		value = reg_val & (~AW88081_BIT_SYSST_CHECK_MASK) & check_val;
		if (value != check_val) {
			dev_err(aw_dev->dev, "check sysst fail, reg_val=0x%04x, check:0x%x",
				reg_val, check_val);
			usleep_range(AW88081_2000_US, AW88081_2000_US + 10);
		} else {
			return 0;
		}
	}

	return -EPERM;
}

static void aw88081_dev_i2s_tx_enable(struct aw_device *aw_dev, bool flag)
{
	if (flag)
		regmap_update_bits(aw_dev->regmap, AW88081_I2SCTRL3_REG,
			~AW88081_I2STXEN_MASK, AW88081_I2STXEN_ENABLE_VALUE);
	else
		regmap_update_bits(aw_dev->regmap, AW88081_I2SCTRL3_REG,
			~AW88081_I2STXEN_MASK, AW88081_I2STXEN_DISABLE_VALUE);
}

static void aw88081_dev_pwd(struct aw_device *aw_dev, bool pwd)
{
	if (pwd)
		regmap_update_bits(aw_dev->regmap, AW88081_SYSCTRL_REG,
				~AW88081_PWDN_MASK, AW88081_PWDN_POWER_DOWN_VALUE);
	else
		regmap_update_bits(aw_dev->regmap, AW88081_SYSCTRL_REG,
				~AW88081_PWDN_MASK, AW88081_PWDN_WORKING_VALUE);
}

static void aw88081_dev_amppd(struct aw_device *aw_dev, bool amppd)
{
	if (amppd)
		regmap_update_bits(aw_dev->regmap, AW88081_SYSCTRL_REG,
				~AW88081_EN_PA_MASK, AW88081_EN_PA_POWER_DOWN_VALUE);
	else
		regmap_update_bits(aw_dev->regmap, AW88081_SYSCTRL_REG,
				~AW88081_EN_PA_MASK, AW88081_EN_PA_WORKING_VALUE);
}

static void aw88083_i2c_wen(struct aw88081 *aw88081, bool flag)
{
	struct aw_device *aw_dev = aw88081->aw_pa;

	if (aw88081->devtype != AW88083)
		return;

	if (flag)
		regmap_update_bits(aw_dev->regmap, AW88081_SYSCTRL_REG,
				~AW88083_I2C_WEN_MASK, AW88083_I2C_WEN_ENABLE_VALUE);
	else
		regmap_update_bits(aw_dev->regmap, AW88081_SYSCTRL_REG,
				~AW88083_I2C_WEN_MASK, AW88083_I2C_WEN_DISABLE_VALUE);
}

static void aw88083_dev_amppd(struct aw_device *aw_dev, bool amppd)
{
	if (amppd)
		regmap_update_bits(aw_dev->regmap, AW88081_SYSCTRL_REG,
				~AW88083_AMPPD_MASK, AW88083_AMPPD_POWER_DOWN_VALUE);
	else
		regmap_update_bits(aw_dev->regmap, AW88081_SYSCTRL_REG,
				~AW88083_AMPPD_MASK, AW88083_AMPPD_WORKING_VALUE);
}

static void aw88083_dev_pllpd(struct aw_device *aw_dev, bool pllpd)
{
	if (pllpd)
		regmap_update_bits(aw_dev->regmap, AW88081_SYSCTRL_REG,
				~AW88083_PLL_PD_MASK, AW88083_PLL_PD_WORKING_VALUE);
	else
		regmap_update_bits(aw_dev->regmap, AW88081_SYSCTRL_REG,
				~AW88083_PLL_PD_MASK, AW88083_PLL_PD_POWER_DOWN_VALUE);
}

static void aw88081_dev_clear_int_status(struct aw_device *aw_dev)
{
	unsigned int int_status;

	/* read int status and clear */
	regmap_read(aw_dev->regmap, AW88081_SYSINT_REG, &int_status);
	/* make sure int status is clear */
	regmap_read(aw_dev->regmap, AW88081_SYSINT_REG, &int_status);

	dev_dbg(aw_dev->dev, "read interrupt reg = 0x%04x", int_status);
}

static void aw88081_dev_set_volume(struct aw_device *aw_dev, unsigned int value)
{
	struct aw_volume_desc *vol_desc = &aw_dev->volume_desc;
	unsigned int volume;

	volume = min((value + vol_desc->init_volume), (unsigned int)AW88081_MUTE_VOL);

	regmap_update_bits(aw_dev->regmap, AW88081_SYSCTRL2_REG, ~AW88081_VOL_MASK, volume);
}

static void aw88081_dev_fade_in(struct aw_device *aw_dev)
{
	struct aw_volume_desc *desc = &aw_dev->volume_desc;
	int fade_in_vol = desc->ctl_volume;
	int fade_step = aw_dev->fade_step;
	int i;

	if (fade_step == 0 || aw_dev->fade_in_time == 0) {
		aw88081_dev_set_volume(aw_dev, fade_in_vol);
		return;
	}

	for (i = AW88081_MUTE_VOL; i >= fade_in_vol; i -= fade_step) {
		aw88081_dev_set_volume(aw_dev, i);
		usleep_range(aw_dev->fade_in_time, aw_dev->fade_in_time + 10);
	}

	if (i != fade_in_vol)
		aw88081_dev_set_volume(aw_dev, fade_in_vol);
}

static void aw88081_dev_fade_out(struct aw_device *aw_dev)
{
	struct aw_volume_desc *desc = &aw_dev->volume_desc;
	int fade_step = aw_dev->fade_step;
	int i;

	if (fade_step == 0 || aw_dev->fade_out_time == 0) {
		aw88081_dev_set_volume(aw_dev, AW88081_MUTE_VOL);
		return;
	}

	for (i = desc->ctl_volume; i <= AW88081_MUTE_VOL; i += fade_step) {
		aw88081_dev_set_volume(aw_dev, i);
		usleep_range(aw_dev->fade_out_time, aw_dev->fade_out_time + 10);
	}

	if (i != AW88081_MUTE_VOL)
		aw88081_dev_set_volume(aw_dev, AW88081_MUTE_VOL);
}

static void aw88081_dev_mute(struct aw_device *aw_dev, bool is_mute)
{
	if (is_mute) {
		aw88081_dev_fade_out(aw_dev);
		regmap_update_bits(aw_dev->regmap, AW88081_SYSCTRL_REG,
				~AW88081_HMUTE_MASK, AW88081_HMUTE_ENABLE_VALUE);
	} else {
		regmap_update_bits(aw_dev->regmap, AW88081_SYSCTRL_REG,
				~AW88081_HMUTE_MASK, AW88081_HMUTE_DISABLE_VALUE);
		aw88081_dev_fade_in(aw_dev);
	}
}

static void aw88081_dev_uls_hmute(struct aw_device *aw_dev, bool uls_hmute)
{
	if (uls_hmute)
		regmap_update_bits(aw_dev->regmap, AW88081_SYSCTRL_REG,
				~AW88081_ULS_HMUTE_MASK,
				AW88081_ULS_HMUTE_ENABLE_VALUE);
	else
		regmap_update_bits(aw_dev->regmap, AW88081_SYSCTRL_REG,
				~AW88081_ULS_HMUTE_MASK,
				AW88081_ULS_HMUTE_DISABLE_VALUE);
}

static int aw88081_dev_reg_value_check(struct aw_device *aw_dev,
					unsigned char reg_addr, unsigned short *reg_val)
{
	unsigned int read_vol;

	if (reg_addr == AW88081_SYSCTRL_REG) {
		*reg_val &= ~(~AW88081_EN_PA_MASK |
			      ~AW88081_PWDN_MASK |
			      ~AW88081_HMUTE_MASK |
			      ~AW88081_ULS_HMUTE_MASK);

		*reg_val |= AW88081_EN_PA_POWER_DOWN_VALUE |
			    AW88081_PWDN_POWER_DOWN_VALUE |
			    AW88081_HMUTE_ENABLE_VALUE |
			    AW88081_ULS_HMUTE_ENABLE_VALUE;
	}

	if (reg_addr == AW88081_SYSCTRL2_REG) {
		read_vol = (*reg_val & (~AW88081_VOL_MASK)) >> AW88081_VOL_START_BIT;
		aw_dev->volume_desc.init_volume = read_vol;
	}

	/* i2stxen */
	if (reg_addr == AW88081_I2SCTRL3_REG) {
		/* close tx */
		*reg_val &= AW88081_I2STXEN_MASK;
		*reg_val |= AW88081_I2STXEN_DISABLE_VALUE;
	}

	return 0;
}

static int aw88083_dev_reg_value_check(struct aw_device *aw_dev,
					unsigned char reg_addr, unsigned short *reg_val)
{
	unsigned int read_vol;

	if (reg_addr == AW88081_SYSCTRL_REG) {
		*reg_val &= ~(~AW88083_AMPPD_MASK |
			      ~AW88081_PWDN_MASK |
			      ~AW88081_HMUTE_MASK |
			      ~AW88083_I2C_WEN_MASK);

		*reg_val |= AW88083_AMPPD_POWER_DOWN_VALUE |
			    AW88081_PWDN_POWER_DOWN_VALUE |
			    AW88081_HMUTE_ENABLE_VALUE |
			    AW88083_I2C_WEN_ENABLE_VALUE;
	}

	if (reg_addr == AW88081_SYSCTRL2_REG) {
		read_vol = (*reg_val & (~AW88081_VOL_MASK)) >> AW88081_VOL_START_BIT;
		aw_dev->volume_desc.init_volume = read_vol;
	}

	return 0;
}

static int aw88081_reg_value_check(struct aw88081 *aw88081,
					unsigned char reg_addr, unsigned short *reg_val)
{
	struct aw_device *aw_dev = aw88081->aw_pa;
	int ret;

	switch (aw88081->devtype) {
	case AW88081:
		ret = aw88081_dev_reg_value_check(aw_dev, reg_addr, reg_val);
		break;
	case AW88083:
		ret = aw88083_dev_reg_value_check(aw_dev, reg_addr, reg_val);
		break;
	default:
		dev_err(aw_dev->dev, "unsupported device\n");
		ret = -EINVAL;
		break;
	}

	return ret;
}

static int aw88081_dev_reg_update(struct aw88081 *aw88081,
					unsigned char *data, unsigned int len)
{
	struct aw_device *aw_dev = aw88081->aw_pa;
	struct aw_volume_desc *vol_desc = &aw_dev->volume_desc;
	int data_len, i, ret;
	int16_t *reg_data;
	u16 reg_val;
	u8 reg_addr;

	if (!len || !data) {
		dev_err(aw_dev->dev, "reg data is null or len is 0");
		return -EINVAL;
	}

	reg_data = (int16_t *)data;
	data_len = len >> 1;

	if (data_len & 0x1) {
		dev_err(aw_dev->dev, "data len:%d unsupported",	data_len);
		return -EINVAL;
	}

	for (i = 0; i < data_len; i += 2) {
		reg_addr = reg_data[i];
		reg_val = reg_data[i + 1];

		ret = aw88081_reg_value_check(aw88081, reg_addr, &reg_val);
		if (ret)
			return ret;

		ret = regmap_write(aw_dev->regmap, reg_addr, reg_val);
		if (ret)
			return ret;
	}

	if (aw_dev->prof_cur != aw_dev->prof_index)
		vol_desc->ctl_volume = 0;

	/* keep min volume */
	aw88081_dev_set_volume(aw_dev, vol_desc->mute_volume);

	return 0;
}

static int aw88081_dev_get_prof_name(struct aw_device *aw_dev, int index, char **prof_name)
{
	struct aw_prof_info *prof_info = &aw_dev->prof_info;
	struct aw_prof_desc *prof_desc;

	if ((index >= aw_dev->prof_info.count) || (index < 0)) {
		dev_err(aw_dev->dev, "index[%d] overflow count[%d]",
			index, aw_dev->prof_info.count);
		return -EINVAL;
	}

	prof_desc = &aw_dev->prof_info.prof_desc[index];

	*prof_name = prof_info->prof_name_list[prof_desc->id];

	return 0;
}

static int aw88081_dev_get_prof_data(struct aw_device *aw_dev, int index,
			struct aw_prof_desc **prof_desc)
{
	if ((index >= aw_dev->prof_info.count) || (index < 0)) {
		dev_err(aw_dev->dev, "%s: index[%d] overflow count[%d]\n",
				__func__, index, aw_dev->prof_info.count);
		return -EINVAL;
	}

	*prof_desc = &aw_dev->prof_info.prof_desc[index];

	return 0;
}

static int aw88081_dev_fw_update(struct aw88081 *aw88081)
{
	struct aw_device *aw_dev = aw88081->aw_pa;
	struct aw_prof_desc *prof_index_desc;
	struct aw_sec_data_desc *sec_desc;
	char *prof_name;
	int ret;

	ret = aw88081_dev_get_prof_name(aw_dev, aw_dev->prof_index, &prof_name);
	if (ret) {
		dev_err(aw_dev->dev, "get prof name failed");
		return -EINVAL;
	}

	dev_dbg(aw_dev->dev, "start update %s", prof_name);

	ret = aw88081_dev_get_prof_data(aw_dev, aw_dev->prof_index, &prof_index_desc);
	if (ret)
		return ret;

	/* update reg */
	sec_desc = prof_index_desc->sec_desc;
	ret = aw88081_dev_reg_update(aw88081, sec_desc[AW88395_DATA_TYPE_REG].data,
					sec_desc[AW88395_DATA_TYPE_REG].len);
	if (ret) {
		dev_err(aw_dev->dev, "update reg failed");
		return ret;
	}

	aw_dev->prof_cur = aw_dev->prof_index;

	return 0;
}

static int aw88081_dev_start(struct aw88081 *aw88081)
{
	struct aw_device *aw_dev = aw88081->aw_pa;
	int ret;

	if (aw_dev->status == AW88081_DEV_PW_ON) {
		dev_dbg(aw_dev->dev, "already power on");
		return 0;
	}

	/* power on */
	aw88081_dev_pwd(aw_dev, false);
	usleep_range(AW88081_2000_US, AW88081_2000_US + 10);

	ret = aw88081_dev_check_syspll(aw_dev);
	if (ret) {
		dev_err(aw_dev->dev, "pll check failed cannot start");
		goto pll_check_fail;
	}

	/* amppd on */
	aw88081_dev_amppd(aw_dev, false);
	usleep_range(AW88081_1000_US, AW88081_1000_US + 50);

	/* check i2s status */
	ret = aw88081_dev_check_sysst(aw_dev);
	if (ret) {
		dev_err(aw_dev->dev, "sysst check failed");
		goto sysst_check_fail;
	}

	/* enable tx feedback */
	aw88081_dev_i2s_tx_enable(aw_dev, true);

	/* close uls mute */
	aw88081_dev_uls_hmute(aw_dev, false);

	/* close mute */
	aw88081_dev_mute(aw_dev, false);

	/* clear inturrupt */
	aw88081_dev_clear_int_status(aw_dev);
	aw_dev->status = AW88081_DEV_PW_ON;

	return 0;

sysst_check_fail:
	aw88081_dev_i2s_tx_enable(aw_dev, false);
	aw88081_dev_clear_int_status(aw_dev);
	aw88081_dev_amppd(aw_dev, true);
pll_check_fail:
	aw88081_dev_pwd(aw_dev, true);
	aw_dev->status = AW88081_DEV_PW_OFF;

	return ret;
}

static int aw88083_dev_start(struct aw88081 *aw88081)
{
	struct aw_device *aw_dev = aw88081->aw_pa;

	if (aw_dev->status == AW88081_DEV_PW_ON) {
		dev_dbg(aw_dev->dev, "already power on");
		return 0;
	}

	aw88083_i2c_wen(aw88081, true);

	/* power on */
	aw88081_dev_pwd(aw_dev, false);
	usleep_range(AW88081_2000_US, AW88081_2000_US + 10);

	aw88083_dev_pllpd(aw_dev, true);
	/* amppd on */
	aw88083_dev_amppd(aw_dev, false);
	usleep_range(AW88081_2000_US, AW88081_2000_US + 50);

	/* close mute */
	aw88081_dev_mute(aw_dev, false);

	aw88083_i2c_wen(aw88081, false);

	aw_dev->status = AW88081_DEV_PW_ON;

	return 0;
}

static int aw88081_device_start(struct aw88081 *aw88081)
{
	int ret;

	switch (aw88081->devtype) {
	case AW88081:
		ret = aw88081_dev_start(aw88081);
		break;
	case AW88083:
		ret = aw88083_dev_start(aw88081);
		break;
	default:
		ret = -EINVAL;
		dev_err(aw88081->aw_pa->dev, "unsupported device\n");
		break;
	}

	return ret;
}

static int aw88081_dev_stop(struct aw88081 *aw88081)
{
	struct aw_device *aw_dev = aw88081->aw_pa;

	if (aw_dev->status == AW88081_DEV_PW_OFF) {
		dev_dbg(aw_dev->dev, "already power off");
		return 0;
	}

	aw_dev->status = AW88081_DEV_PW_OFF;

	/* clear inturrupt */
	aw88081_dev_clear_int_status(aw_dev);

	aw88081_dev_uls_hmute(aw_dev, true);
	/* set mute */
	aw88081_dev_mute(aw_dev, true);

	/* close tx feedback */
	aw88081_dev_i2s_tx_enable(aw_dev, false);
	usleep_range(AW88081_1000_US, AW88081_1000_US + 100);

	/* enable amppd */
	aw88081_dev_amppd(aw_dev, true);

	/* set power down */
	aw88081_dev_pwd(aw_dev, true);

	return 0;
}

static int aw88083_dev_stop(struct aw88081 *aw88081)
{
	struct aw_device *aw_dev = aw88081->aw_pa;

	if (aw_dev->status == AW88081_DEV_PW_OFF) {
		dev_dbg(aw_dev->dev, "already power off");
		return 0;
	}

	aw_dev->status = AW88081_DEV_PW_OFF;

	aw88083_i2c_wen(aw88081, true);
	/* set mute */
	aw88081_dev_mute(aw_dev, true);

	usleep_range(AW88081_2000_US, AW88081_2000_US + 100);

	/* enable amppd */
	aw88083_dev_amppd(aw_dev, true);

	aw88083_dev_pllpd(aw_dev, false);

	/* set power down */
	aw88081_dev_pwd(aw_dev, true);

	aw88083_i2c_wen(aw88081, false);

	return 0;
}

static int aw88081_stop(struct aw88081 *aw88081)
{
	int ret;

	switch (aw88081->devtype) {
	case AW88081:
		ret = aw88081_dev_stop(aw88081);
		break;
	case AW88083:
		ret = aw88083_dev_stop(aw88081);
		break;
	default:
		dev_err(aw88081->aw_pa->dev, "unsupported device\n");
		ret = -EINVAL;
		break;
	}

	return ret;
}

static int aw88081_reg_update(struct aw88081 *aw88081, bool force)
{
	struct aw_device *aw_dev = aw88081->aw_pa;
	int ret;

	if (force) {
		ret = regmap_write(aw_dev->regmap,
					AW88081_ID_REG, AW88081_SOFT_RESET_VALUE);
		if (ret)
			return ret;

		ret = aw88081_dev_fw_update(aw88081);
		if (ret)
			return ret;
	} else {
		if (aw_dev->prof_cur != aw_dev->prof_index) {
			ret = aw88081_dev_fw_update(aw88081);
			if (ret)
				return ret;
		}
	}

	aw_dev->prof_cur = aw_dev->prof_index;

	return 0;
}

static void aw88081_start_pa(struct aw88081 *aw88081)
{
	int ret, i;

	for (i = 0; i < AW88081_START_RETRIES; i++) {
		ret = aw88081_reg_update(aw88081, aw88081->phase_sync);
		if (ret) {
			dev_err(aw88081->aw_pa->dev, "fw update failed, cnt:%d\n", i);
			continue;
		}
		ret = aw88081_device_start(aw88081);
		if (ret) {
			dev_err(aw88081->aw_pa->dev, "aw88081 device start failed. retry = %d", i);
			continue;
		} else {
			dev_dbg(aw88081->aw_pa->dev, "start success\n");
			break;
		}
	}
}

static void aw88081_startup_work(struct work_struct *work)
{
	struct aw88081 *aw88081 =
		container_of(work, struct aw88081, start_work.work);

	mutex_lock(&aw88081->lock);
	aw88081_start_pa(aw88081);
	mutex_unlock(&aw88081->lock);
}

static void aw88081_start(struct aw88081 *aw88081, bool sync_start)
{
	if (aw88081->aw_pa->fw_status != AW88081_DEV_FW_OK)
		return;

	if (aw88081->aw_pa->status == AW88081_DEV_PW_ON)
		return;

	if (sync_start == AW88081_SYNC_START)
		aw88081_start_pa(aw88081);
	else
		queue_delayed_work(system_wq,
			&aw88081->start_work,
			AW88081_START_WORK_DELAY_MS);
}

static struct snd_soc_dai_driver aw88081_dai[] = {
	{
		.name = "aw88081-aif",
		.id = 1,
		.playback = {
			.stream_name = "Speaker_Playback",
			.channels_min = 1,
			.channels_max = 2,
			.rates = AW88081_RATES,
			.formats = AW88081_FORMATS,
		},
		.capture = {
			.stream_name = "Speaker_Capture",
			.channels_min = 1,
			.channels_max = 2,
			.rates = AW88081_RATES,
			.formats = AW88081_FORMATS,
		},
	},
};

static int aw88081_get_fade_in_time(struct snd_kcontrol *kcontrol,
	struct snd_ctl_elem_value *ucontrol)
{
	struct snd_soc_component *component = snd_soc_kcontrol_component(kcontrol);
	struct aw88081 *aw88081 = snd_soc_component_get_drvdata(component);
	struct aw_device *aw_dev = aw88081->aw_pa;

	ucontrol->value.integer.value[0] = aw_dev->fade_in_time;

	return 0;
}

static int aw88081_set_fade_in_time(struct snd_kcontrol *kcontrol,
	struct snd_ctl_elem_value *ucontrol)
{
	struct snd_soc_component *component = snd_soc_kcontrol_component(kcontrol);
	struct aw88081 *aw88081 = snd_soc_component_get_drvdata(component);
	struct soc_mixer_control *mc =
		(struct soc_mixer_control *)kcontrol->private_value;
	struct aw_device *aw_dev = aw88081->aw_pa;
	int time;

	time = ucontrol->value.integer.value[0];

	if (time < mc->min || time > mc->max)
		return -EINVAL;

	if (time != aw_dev->fade_in_time) {
		aw_dev->fade_in_time = time;
		return 1;
	}

	return 0;
}

static int aw88081_get_fade_out_time(struct snd_kcontrol *kcontrol,
	struct snd_ctl_elem_value *ucontrol)
{
	struct snd_soc_component *component = snd_soc_kcontrol_component(kcontrol);
	struct aw88081 *aw88081 = snd_soc_component_get_drvdata(component);
	struct aw_device *aw_dev = aw88081->aw_pa;

	ucontrol->value.integer.value[0] = aw_dev->fade_out_time;

	return 0;
}

static int aw88081_set_fade_out_time(struct snd_kcontrol *kcontrol,
	struct snd_ctl_elem_value *ucontrol)
{
	struct snd_soc_component *component = snd_soc_kcontrol_component(kcontrol);
	struct aw88081 *aw88081 = snd_soc_component_get_drvdata(component);
	struct soc_mixer_control *mc =
		(struct soc_mixer_control *)kcontrol->private_value;
	struct aw_device *aw_dev = aw88081->aw_pa;
	int time;

	time = ucontrol->value.integer.value[0];
	if (time < mc->min || time > mc->max)
		return -EINVAL;

	if (time != aw_dev->fade_out_time) {
		aw_dev->fade_out_time = time;
		return 1;
	}

	return 0;
}

static int aw88081_dev_set_profile_index(struct aw_device *aw_dev, int index)
{
	/* check the index whether is valid */
	if ((index >= aw_dev->prof_info.count) || (index < 0))
		return -EINVAL;
	/* check the index whether change */
	if (aw_dev->prof_index == index)
		return -EPERM;

	aw_dev->prof_index = index;

	return 0;
}

static int aw88081_profile_info(struct snd_kcontrol *kcontrol,
			 struct snd_ctl_elem_info *uinfo)
{
	struct snd_soc_component *codec = snd_soc_kcontrol_component(kcontrol);
	struct aw88081 *aw88081 = snd_soc_component_get_drvdata(codec);
	char *prof_name;
	int count, ret;

	uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
	uinfo->count = 1;

	count = aw88081->aw_pa->prof_info.count;
	if (count <= 0) {
		uinfo->value.enumerated.items = 0;
		return 0;
	}

	uinfo->value.enumerated.items = count;

	if (uinfo->value.enumerated.item >= count)
		uinfo->value.enumerated.item = count - 1;

	count = uinfo->value.enumerated.item;

	ret = aw88081_dev_get_prof_name(aw88081->aw_pa, count, &prof_name);
	if (ret) {
		strscpy(uinfo->value.enumerated.name, "null");
		return 0;
	}

	strscpy(uinfo->value.enumerated.name, prof_name);

	return 0;
}

static int aw88081_profile_get(struct snd_kcontrol *kcontrol,
			struct snd_ctl_elem_value *ucontrol)
{
	struct snd_soc_component *codec = snd_soc_kcontrol_component(kcontrol);
	struct aw88081 *aw88081 = snd_soc_component_get_drvdata(codec);

	ucontrol->value.integer.value[0] = aw88081->aw_pa->prof_index;

	return 0;
}

static int aw88081_profile_set(struct snd_kcontrol *kcontrol,
		struct snd_ctl_elem_value *ucontrol)
{
	struct snd_soc_component *codec = snd_soc_kcontrol_component(kcontrol);
	struct aw88081 *aw88081 = snd_soc_component_get_drvdata(codec);
	int ret;

	/* pa stop or stopping just set profile */
	mutex_lock(&aw88081->lock);
	ret = aw88081_dev_set_profile_index(aw88081->aw_pa, ucontrol->value.integer.value[0]);
	if (ret) {
		dev_dbg(codec->dev, "profile index does not change");
		mutex_unlock(&aw88081->lock);
		return 0;
	}

	if (aw88081->aw_pa->status) {
		aw88081_stop(aw88081);
		aw88081_start(aw88081, AW88081_SYNC_START);
	}

	mutex_unlock(&aw88081->lock);

	return 1;
}

static int aw88081_volume_get(struct snd_kcontrol *kcontrol,
				struct snd_ctl_elem_value *ucontrol)
{
	struct snd_soc_component *codec = snd_soc_kcontrol_component(kcontrol);
	struct aw88081 *aw88081 = snd_soc_component_get_drvdata(codec);
	struct aw_volume_desc *vol_desc = &aw88081->aw_pa->volume_desc;

	ucontrol->value.integer.value[0] = vol_desc->ctl_volume;

	return 0;
}

static int aw88081_volume_set(struct snd_kcontrol *kcontrol,
				struct snd_ctl_elem_value *ucontrol)
{
	struct snd_soc_component *codec = snd_soc_kcontrol_component(kcontrol);
	struct aw88081 *aw88081 = snd_soc_component_get_drvdata(codec);
	struct aw_volume_desc *vol_desc = &aw88081->aw_pa->volume_desc;
	struct soc_mixer_control *mc =
		(struct soc_mixer_control *)kcontrol->private_value;
	int value;

	value = ucontrol->value.integer.value[0];

	if (value < mc->min || value > mc->max)
		return -EINVAL;

	aw88083_i2c_wen(aw88081, true);

	if (vol_desc->ctl_volume != value) {
		vol_desc->ctl_volume = value;
		aw88081_dev_set_volume(aw88081->aw_pa, vol_desc->ctl_volume);
		return 1;
	}

	aw88083_i2c_wen(aw88081, false);

	return 0;
}

static int aw88081_get_fade_step(struct snd_kcontrol *kcontrol,
				struct snd_ctl_elem_value *ucontrol)
{
	struct snd_soc_component *codec = snd_soc_kcontrol_component(kcontrol);
	struct aw88081 *aw88081 = snd_soc_component_get_drvdata(codec);

	ucontrol->value.integer.value[0] = aw88081->aw_pa->fade_step;

	return 0;
}

static int aw88081_set_fade_step(struct snd_kcontrol *kcontrol,
				struct snd_ctl_elem_value *ucontrol)
{
	struct snd_soc_component *codec = snd_soc_kcontrol_component(kcontrol);
	struct aw88081 *aw88081 = snd_soc_component_get_drvdata(codec);
	struct soc_mixer_control *mc =
		(struct soc_mixer_control *)kcontrol->private_value;
	int value;

	value = ucontrol->value.integer.value[0];
	if (value < mc->min || value > mc->max)
		return -EINVAL;

	if (aw88081->aw_pa->fade_step != value) {
		aw88081->aw_pa->fade_step = value;
		return 1;
	}

	return 0;
}

static const struct snd_kcontrol_new aw88081_controls[] = {
	SOC_SINGLE_EXT("PCM Playback Volume", AW88081_SYSCTRL2_REG,
		0, AW88081_MUTE_VOL, 0, aw88081_volume_get,
		aw88081_volume_set),
	SOC_SINGLE_EXT("Fade Step", 0, 0, AW88081_MUTE_VOL, 0,
		aw88081_get_fade_step, aw88081_set_fade_step),
	SOC_SINGLE_EXT("Volume Ramp Up Step", 0, 0, FADE_TIME_MAX, 0,
		aw88081_get_fade_in_time, aw88081_set_fade_in_time),
	SOC_SINGLE_EXT("Volume Ramp Down Step", 0, 0, FADE_TIME_MAX, 0,
		aw88081_get_fade_out_time, aw88081_set_fade_out_time),
	AW88081_PROFILE_EXT("Profile Set", aw88081_profile_info,
		aw88081_profile_get, aw88081_profile_set),
};

static void aw88081_parse_channel_dt(struct aw88081 *aw88081)
{
	struct aw_device *aw_dev = aw88081->aw_pa;
	struct device_node *np = aw_dev->dev->of_node;
	u32 channel_value = AW88081_DEV_DEFAULT_CH;

	of_property_read_u32(np, "awinic,audio-channel", &channel_value);
	aw88081->phase_sync = of_property_read_bool(np, "awinic,sync-flag");

	aw_dev->channel = channel_value;
}

static int aw88081_init(struct aw88081 *aw88081, struct i2c_client *i2c, struct regmap *regmap)
{
	struct aw_device *aw_dev;
	unsigned int chip_id;
	int ret;

	/* read chip id */
	ret = regmap_read(regmap, AW88081_ID_REG, &chip_id);
	if (ret) {
		dev_err(&i2c->dev, "%s read chipid error. ret = %d", __func__, ret);
		return ret;
	}

	switch (chip_id) {
	case AW88081_CHIP_ID:
		dev_dbg(&i2c->dev, "chip id = 0x%x\n", chip_id);
		break;
	case AW88083_CHIP_ID:
		dev_dbg(&i2c->dev, "chip id = 0x%x\n", chip_id);
		break;
	default:
		dev_err(&i2c->dev, "unsupported device");
		return -ENXIO;
	}

	aw_dev = devm_kzalloc(&i2c->dev, sizeof(*aw_dev), GFP_KERNEL);
	if (!aw_dev)
		return -ENOMEM;

	aw88081->aw_pa = aw_dev;
	aw_dev->i2c = i2c;
	aw_dev->regmap = regmap;
	aw_dev->dev = &i2c->dev;
	aw_dev->chip_id = chip_id;
	aw_dev->acf = NULL;
	aw_dev->prof_info.prof_desc = NULL;
	aw_dev->prof_info.prof_type = AW88395_DEV_NONE_TYPE_ID;
	aw_dev->fade_step = AW88081_VOLUME_STEP_DB;
	aw_dev->volume_desc.mute_volume = AW88081_MUTE_VOL;
	aw88081_parse_channel_dt(aw88081);

	return 0;
}

static int aw88081_dev_init(struct aw88081 *aw88081, struct aw_container *aw_cfg)
{
	struct aw_device *aw_dev = aw88081->aw_pa;
	int ret;

	ret = aw88395_dev_cfg_load(aw_dev, aw_cfg);
	if (ret) {
		dev_err(aw_dev->dev, "aw_dev acf parse failed");
		return -EINVAL;
	}

	ret = regmap_write(aw_dev->regmap, AW88081_ID_REG, AW88081_SOFT_RESET_VALUE);
	if (ret)
		return ret;

	aw_dev->fade_in_time = AW88081_500_US;
	aw_dev->fade_out_time = AW88081_500_US;
	aw_dev->prof_cur = AW88081_INIT_PROFILE;
	aw_dev->prof_index = AW88081_INIT_PROFILE;

	ret = aw88081_dev_fw_update(aw88081);
	if (ret) {
		dev_err(aw_dev->dev, "fw update failed ret = %d\n", ret);
		return ret;
	}

	aw_dev->status = AW88081_DEV_PW_ON;
	aw88081_stop(aw88081);

	return 0;
}

static int aw88081_request_firmware_file(struct aw88081 *aw88081)
{
	const struct firmware *cont = NULL;
	int ret;

	aw88081->aw_pa->fw_status = AW88081_DEV_FW_FAILED;

	ret = request_firmware(&cont, AW88081_ACF_FILE, aw88081->aw_pa->dev);
	if (ret)
		return ret;

	dev_dbg(aw88081->aw_pa->dev, "loaded %s - size: %zu\n",
			AW88081_ACF_FILE, cont ? cont->size : 0);

	aw88081->aw_cfg = devm_kzalloc(aw88081->aw_pa->dev, cont->size + sizeof(int), GFP_KERNEL);
	if (!aw88081->aw_cfg) {
		release_firmware(cont);
		return -ENOMEM;
	}
	aw88081->aw_cfg->len = (int)cont->size;
	memcpy(aw88081->aw_cfg->data, cont->data, cont->size);
	release_firmware(cont);

	ret = aw88395_dev_load_acf_check(aw88081->aw_pa, aw88081->aw_cfg);
	if (ret)
		return ret;

	mutex_lock(&aw88081->lock);
	ret = aw88081_dev_init(aw88081, aw88081->aw_cfg);
	mutex_unlock(&aw88081->lock);

	return ret;
}

static int aw88081_playback_event(struct snd_soc_dapm_widget *w,
				struct snd_kcontrol *k, int event)
{
	struct snd_soc_component *component = snd_soc_dapm_to_component(w->dapm);
	struct aw88081 *aw88081 = snd_soc_component_get_drvdata(component);

	mutex_lock(&aw88081->lock);
	switch (event) {
	case SND_SOC_DAPM_PRE_PMU:
		aw88081_start(aw88081, AW88081_ASYNC_START);
		break;
	case SND_SOC_DAPM_POST_PMD:
		aw88081_stop(aw88081);
		break;
	default:
		break;
	}
	mutex_unlock(&aw88081->lock);

	return 0;
}

static const struct snd_soc_dapm_widget aw88081_dapm_widgets[] = {
	 /* playback */
	SND_SOC_DAPM_AIF_IN_E("AIF_RX", "Speaker_Playback", 0, SND_SOC_NOPM, 0, 0,
					aw88081_playback_event,
					SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMD),
	SND_SOC_DAPM_OUTPUT("DAC Output"),

	/* capture */
	SND_SOC_DAPM_AIF_OUT("AIF_TX", "Speaker_Capture", 0, SND_SOC_NOPM, 0, 0),
	SND_SOC_DAPM_INPUT("ADC Input"),
};

static const struct snd_soc_dapm_route aw88081_audio_map[] = {
	{"DAC Output", NULL, "AIF_RX"},
	{"AIF_TX", NULL, "ADC Input"},
};

static int aw88081_codec_probe(struct snd_soc_component *component)
{
	struct aw88081 *aw88081 = snd_soc_component_get_drvdata(component);
	int ret;

	INIT_DELAYED_WORK(&aw88081->start_work, aw88081_startup_work);

	ret = aw88081_request_firmware_file(aw88081);
	if (ret)
		dev_err(aw88081->aw_pa->dev, "%s: request firmware failed\n", __func__);

	return ret;
}

static void aw88081_codec_remove(struct snd_soc_component *aw_codec)
{
	struct aw88081 *aw88081 = snd_soc_component_get_drvdata(aw_codec);

	cancel_delayed_work_sync(&aw88081->start_work);
}

static const struct snd_soc_component_driver soc_codec_dev_aw88081 = {
	.probe = aw88081_codec_probe,
	.remove = aw88081_codec_remove,
	.dapm_widgets = aw88081_dapm_widgets,
	.num_dapm_widgets = ARRAY_SIZE(aw88081_dapm_widgets),
	.dapm_routes = aw88081_audio_map,
	.num_dapm_routes = ARRAY_SIZE(aw88081_audio_map),
	.controls = aw88081_controls,
	.num_controls = ARRAY_SIZE(aw88081_controls),
};

static const struct i2c_device_id aw88081_i2c_id[] = {
	{ AW88081_I2C_NAME, AW88081},
	{ AW88083_I2C_NAME, AW88083},
	{ }
};
MODULE_DEVICE_TABLE(i2c, aw88081_i2c_id);

static int aw88081_i2c_probe(struct i2c_client *i2c)
{
	const struct regmap_config *regmap_config;
	const struct i2c_device_id *id;
	struct aw88081 *aw88081;
	int ret;

	ret = i2c_check_functionality(i2c->adapter, I2C_FUNC_I2C);
	if (!ret)
		return dev_err_probe(&i2c->dev, -ENXIO, "check_functionality failed");

	aw88081 = devm_kzalloc(&i2c->dev, sizeof(*aw88081), GFP_KERNEL);
	if (!aw88081)
		return -ENOMEM;

	id = i2c_match_id(aw88081_i2c_id, i2c);
	aw88081->devtype = id->driver_data;

	mutex_init(&aw88081->lock);

	i2c_set_clientdata(i2c, aw88081);

	switch (aw88081->devtype) {
	case AW88081:
		regmap_config = &aw88081_regmap_config;
		break;
	case AW88083:
		regmap_config = &aw88083_regmap_config;
		break;
	default:
		return -EINVAL;
	}

	aw88081->regmap = devm_regmap_init_i2c(i2c, regmap_config);
	if (IS_ERR(aw88081->regmap))
		return dev_err_probe(&i2c->dev, PTR_ERR(aw88081->regmap),
						"failed to init regmap\n");

	/* aw pa init */
	ret = aw88081_init(aw88081, i2c, aw88081->regmap);
	if (ret)
		return ret;

	return devm_snd_soc_register_component(&i2c->dev,
			&soc_codec_dev_aw88081,
			aw88081_dai, ARRAY_SIZE(aw88081_dai));
}

#if defined(CONFIG_OF)
static const struct of_device_id aw88081_of_match[] = {
	{ .compatible = "awinic,aw88081" },
	{ .compatible = "awinic,aw88083" },
	{ }
};
MODULE_DEVICE_TABLE(of, aw88081_of_match);
#endif

static struct i2c_driver aw88081_i2c_driver = {
	.driver = {
		.name = AW88081_I2C_NAME,
		.of_match_table = of_match_ptr(aw88081_of_match),
	},
	.probe = aw88081_i2c_probe,
	.id_table = aw88081_i2c_id,
};
module_i2c_driver(aw88081_i2c_driver);

MODULE_DESCRIPTION("ASoC AW88081 Smart PA Driver");
MODULE_LICENSE("GPL v2");
