// SPDX-License-Identifier: GPL-2.0
//
// rk3228_codec.c  --  rk3228 ALSA Soc Audio driver
//
// Copyright (c) 2018, Fuzhou Rockchip Electronics Co., Ltd All rights reserved.

#include <linux/module.h>
#include <linux/device.h>
#include <linux/delay.h>
#include <linux/of.h>
#include <linux/of_gpio.h>
#include <linux/clk.h>
#include <linux/platform_device.h>
#include <linux/pm_runtime.h>
#include <linux/regmap.h>
#include <sound/pcm_params.h>
#include <sound/dmaengine_pcm.h>
#include "rk3228_codec.h"

/*
 * volume setting
 * 0: -39dB
 * 26: 0dB
 * 31: 6dB
 * Step: 1.5dB
 */
#define OUT_VOLUME	(0x18)
#define INITIAL_FREQ	(11289600)

struct rk3228_codec_priv {
	struct regmap *regmap;
	struct clk *mclk;
	struct clk *pclk;
	struct clk *sclk;
	struct gpio_desc *spk_en_gpio;
	int spk_depop_time; /* msec */
};

static const struct reg_default rk3228_codec_reg_defaults[] = {
	{ CODEC_RESET, 0x03 },
	{ DAC_INIT_CTRL1, 0x00 },
	{ DAC_INIT_CTRL2, 0x50 },
	{ DAC_INIT_CTRL3, 0x0e },
	{ DAC_PRECHARGE_CTRL, 0x01 },
	{ DAC_PWR_CTRL, 0x00 },
	{ DAC_CLK_CTRL, 0x00 },
	{ HPMIX_CTRL, 0x00 },
	{ HPOUT_CTRL, 0x00 },
	{ HPOUTL_GAIN_CTRL, 0x00 },
	{ HPOUTR_GAIN_CTRL, 0x00 },
	{ HPOUT_POP_CTRL, 0x11 },
};

static int rk3228_codec_reset(struct snd_soc_component *component)
{
	struct rk3228_codec_priv *rk3228 = snd_soc_component_get_drvdata(component);

	regmap_write(rk3228->regmap, CODEC_RESET, 0);
	mdelay(10);
	regmap_write(rk3228->regmap, CODEC_RESET, 0x03);

	return 0;
}

static int rk3228_set_dai_fmt(struct snd_soc_dai *dai,
			      unsigned int fmt)
{
	struct snd_soc_component *component = dai->component;
	struct rk3228_codec_priv *rk3228 = snd_soc_component_get_drvdata(component);
	unsigned int val = 0;

	switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
	case SND_SOC_DAIFMT_CBS_CFS:
		val |= PIN_DIRECTION_IN | DAC_I2S_MODE_SLAVE;
		break;
	case SND_SOC_DAIFMT_CBM_CFM:
		val |= PIN_DIRECTION_OUT | DAC_I2S_MODE_MASTER;
		break;
	default:
		return -EINVAL;
	}

	regmap_update_bits(rk3228->regmap, DAC_INIT_CTRL1,
			   PIN_DIRECTION_MASK | DAC_I2S_MODE_MASK, val);

	val = 0;
	switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
	case SND_SOC_DAIFMT_DSP_A:
	case SND_SOC_DAIFMT_DSP_B:
		val |= DAC_MODE_PCM;
		break;
	case SND_SOC_DAIFMT_I2S:
		val |= DAC_MODE_I2S;
		break;
	case SND_SOC_DAIFMT_RIGHT_J:
		val |= DAC_MODE_RJM;
		break;
	case SND_SOC_DAIFMT_LEFT_J:
		val |= DAC_MODE_LJM;
		break;
	default:
		return -EINVAL;
	}

	regmap_update_bits(rk3228->regmap, DAC_INIT_CTRL2,
			   DAC_MODE_MASK, val);
	return 0;
}

static void rk3228_analog_output(struct rk3228_codec_priv *rk3228, int mute)
{
	if (rk3228->spk_en_gpio)
		gpiod_set_value(rk3228->spk_en_gpio, mute);
}

static int rk3228_digital_mute(struct snd_soc_dai *dai, int mute, int stream)
{
	struct snd_soc_component *component = dai->component;
	struct rk3228_codec_priv *rk3228 = snd_soc_component_get_drvdata(component);
	unsigned int val = 0;

	if (mute)
		val = HPOUTL_MUTE | HPOUTR_MUTE;
	else
		val = HPOUTL_UNMUTE | HPOUTR_UNMUTE;

	regmap_update_bits(rk3228->regmap, HPOUT_CTRL,
			   HPOUTL_MUTE_MASK | HPOUTR_MUTE_MASK, val);
	return 0;
}

static int rk3228_codec_power_on(struct snd_soc_component *component, int wait_ms)
{
	struct rk3228_codec_priv *rk3228 = snd_soc_component_get_drvdata(component);

	regmap_update_bits(rk3228->regmap, DAC_PRECHARGE_CTRL,
			   DAC_CHARGE_XCHARGE_MASK, DAC_CHARGE_PRECHARGE);
	mdelay(10);
	regmap_update_bits(rk3228->regmap, DAC_PRECHARGE_CTRL,
			   DAC_CHARGE_CURRENT_ALL_MASK,
			   DAC_CHARGE_CURRENT_ALL_ON);

	mdelay(wait_ms);

	return 0;
}

static int rk3228_codec_power_off(struct snd_soc_component *component, int wait_ms)
{
	struct rk3228_codec_priv *rk3228 = snd_soc_component_get_drvdata(component);

	regmap_update_bits(rk3228->regmap, DAC_PRECHARGE_CTRL,
			   DAC_CHARGE_XCHARGE_MASK, DAC_CHARGE_DISCHARGE);
	mdelay(10);
	regmap_update_bits(rk3228->regmap, DAC_PRECHARGE_CTRL,
			   DAC_CHARGE_CURRENT_ALL_MASK,
			   DAC_CHARGE_CURRENT_ALL_ON);

	mdelay(wait_ms);

	return 0;
}

static struct rk3228_reg_msk_val playback_open_list[] = {
	{ DAC_PWR_CTRL, DAC_PWR_MASK, DAC_PWR_ON },
	{ DAC_PWR_CTRL, DACL_PATH_REFV_MASK | DACR_PATH_REFV_MASK,
	  DACL_PATH_REFV_ON | DACR_PATH_REFV_ON },
	{ DAC_PWR_CTRL, HPOUTL_ZERO_CROSSING_ON | HPOUTR_ZERO_CROSSING_ON,
	  HPOUTL_ZERO_CROSSING_ON | HPOUTR_ZERO_CROSSING_ON },
	{ HPOUT_POP_CTRL, HPOUTR_POP_MASK | HPOUTL_POP_MASK,
	  HPOUTR_POP_WORK | HPOUTL_POP_WORK },
	{ HPMIX_CTRL, HPMIXL_MASK | HPMIXR_MASK, HPMIXL_EN | HPMIXR_EN },
	{ HPMIX_CTRL, HPMIXL_INIT_MASK | HPMIXR_INIT_MASK,
	  HPMIXL_INIT_EN | HPMIXR_INIT_EN },
	{ HPOUT_CTRL, HPOUTL_MASK | HPOUTR_MASK, HPOUTL_EN | HPOUTR_EN },
	{ HPOUT_CTRL, HPOUTL_INIT_MASK | HPOUTR_INIT_MASK,
	  HPOUTL_INIT_EN | HPOUTR_INIT_EN },
	{ DAC_CLK_CTRL, DACL_REFV_MASK | DACR_REFV_MASK,
	  DACL_REFV_ON | DACR_REFV_ON },
	{ DAC_CLK_CTRL, DACL_CLK_MASK | DACR_CLK_MASK,
	  DACL_CLK_ON | DACR_CLK_ON },
	{ DAC_CLK_CTRL, DACL_MASK | DACR_MASK, DACL_ON | DACR_ON },
	{ DAC_CLK_CTRL, DACL_INIT_MASK | DACR_INIT_MASK,
	  DACL_INIT_ON | DACR_INIT_ON },
	{ DAC_SELECT, DACL_SELECT_MASK | DACR_SELECT_MASK,
	  DACL_SELECT | DACR_SELECT },
	{ HPMIX_CTRL, HPMIXL_INIT2_MASK | HPMIXR_INIT2_MASK,
	  HPMIXL_INIT2_EN | HPMIXR_INIT2_EN },
	{ HPOUT_CTRL, HPOUTL_MUTE_MASK | HPOUTR_MUTE_MASK,
	  HPOUTL_UNMUTE | HPOUTR_UNMUTE },
};

#define PLAYBACK_OPEN_LIST_LEN ARRAY_SIZE(playback_open_list)

static int rk3228_codec_open_playback(struct snd_soc_component *component)
{
	struct rk3228_codec_priv *rk3228 = snd_soc_component_get_drvdata(component);
	int i = 0;

	regmap_update_bits(rk3228->regmap, DAC_PRECHARGE_CTRL,
			   DAC_CHARGE_CURRENT_ALL_MASK,
			   DAC_CHARGE_CURRENT_I);

	for (i = 0; i < PLAYBACK_OPEN_LIST_LEN; i++) {
		regmap_update_bits(rk3228->regmap,
				   playback_open_list[i].reg,
				   playback_open_list[i].msk,
				   playback_open_list[i].val);
		mdelay(1);
	}

	msleep(rk3228->spk_depop_time);
	rk3228_analog_output(rk3228, 1);

	regmap_update_bits(rk3228->regmap, HPOUTL_GAIN_CTRL,
			   HPOUTL_GAIN_MASK, OUT_VOLUME);
	regmap_update_bits(rk3228->regmap, HPOUTR_GAIN_CTRL,
			   HPOUTR_GAIN_MASK, OUT_VOLUME);
	return 0;
}

static struct rk3228_reg_msk_val playback_close_list[] = {
	{ HPMIX_CTRL, HPMIXL_INIT2_MASK | HPMIXR_INIT2_MASK,
	  HPMIXL_INIT2_DIS | HPMIXR_INIT2_DIS },
	{ DAC_SELECT, DACL_SELECT_MASK | DACR_SELECT_MASK,
	  DACL_DESELECT | DACR_DESELECT },
	{ HPOUT_CTRL, HPOUTL_MUTE_MASK | HPOUTR_MUTE_MASK,
	  HPOUTL_MUTE | HPOUTR_MUTE },
	{ HPOUT_CTRL, HPOUTL_INIT_MASK | HPOUTR_INIT_MASK,
	  HPOUTL_INIT_DIS | HPOUTR_INIT_DIS },
	{ HPOUT_CTRL, HPOUTL_MASK | HPOUTR_MASK, HPOUTL_DIS | HPOUTR_DIS },
	{ HPMIX_CTRL, HPMIXL_MASK | HPMIXR_MASK, HPMIXL_DIS | HPMIXR_DIS },
	{ DAC_CLK_CTRL, DACL_MASK | DACR_MASK, DACL_OFF | DACR_OFF },
	{ DAC_CLK_CTRL, DACL_CLK_MASK | DACR_CLK_MASK,
	  DACL_CLK_OFF | DACR_CLK_OFF },
	{ DAC_CLK_CTRL, DACL_REFV_MASK | DACR_REFV_MASK,
	  DACL_REFV_OFF | DACR_REFV_OFF },
	{ HPOUT_POP_CTRL, HPOUTR_POP_MASK | HPOUTL_POP_MASK,
	  HPOUTR_POP_XCHARGE | HPOUTL_POP_XCHARGE },
	{ DAC_PWR_CTRL, DACL_PATH_REFV_MASK | DACR_PATH_REFV_MASK,
	  DACL_PATH_REFV_OFF | DACR_PATH_REFV_OFF },
	{ DAC_PWR_CTRL, DAC_PWR_MASK, DAC_PWR_OFF },
	{ HPMIX_CTRL, HPMIXL_INIT_MASK | HPMIXR_INIT_MASK,
	  HPMIXL_INIT_DIS | HPMIXR_INIT_DIS },
	{ DAC_CLK_CTRL, DACL_INIT_MASK | DACR_INIT_MASK,
	  DACL_INIT_OFF | DACR_INIT_OFF },
};

#define PLAYBACK_CLOSE_LIST_LEN ARRAY_SIZE(playback_close_list)

static int rk3228_codec_close_playback(struct snd_soc_component *component)
{
	struct rk3228_codec_priv *rk3228 = snd_soc_component_get_drvdata(component);
	int i = 0;

	rk3228_analog_output(rk3228, 0);

	regmap_update_bits(rk3228->regmap, HPOUTL_GAIN_CTRL,
			   HPOUTL_GAIN_MASK, 0);
	regmap_update_bits(rk3228->regmap, HPOUTR_GAIN_CTRL,
			   HPOUTR_GAIN_MASK, 0);

	for (i = 0; i < PLAYBACK_CLOSE_LIST_LEN; i++) {
		regmap_update_bits(rk3228->regmap,
				   playback_close_list[i].reg,
				   playback_close_list[i].msk,
				   playback_close_list[i].val);
		mdelay(1);
	}

	regmap_update_bits(rk3228->regmap, DAC_PRECHARGE_CTRL,
			   DAC_CHARGE_CURRENT_ALL_MASK,
			   DAC_CHARGE_CURRENT_I);
	return 0;
}

static int rk3228_hw_params(struct snd_pcm_substream *substream,
			    struct snd_pcm_hw_params *params,
			    struct snd_soc_dai *dai)
{
	struct snd_soc_component *component = dai->component;
	struct rk3228_codec_priv *rk3228 = snd_soc_component_get_drvdata(component);
	unsigned int val = 0;

	switch (params_format(params)) {
	case SNDRV_PCM_FORMAT_S16_LE:
		val |= DAC_VDL_16BITS;
		break;
	case SNDRV_PCM_FORMAT_S20_3LE:
		val |= DAC_VDL_20BITS;
		break;
	case SNDRV_PCM_FORMAT_S24_LE:
		val |= DAC_VDL_24BITS;
		break;
	case SNDRV_PCM_FORMAT_S32_LE:
		val |= DAC_VDL_32BITS;
		break;
	default:
		return -EINVAL;
	}

	regmap_update_bits(rk3228->regmap, DAC_INIT_CTRL2, DAC_VDL_MASK, val);
	val = DAC_WL_32BITS | DAC_RST_DIS;
	regmap_update_bits(rk3228->regmap, DAC_INIT_CTRL3,
			   DAC_WL_MASK | DAC_RST_MASK, val);

	return 0;
}

static int rk3228_pcm_startup(struct snd_pcm_substream *substream,
			      struct snd_soc_dai *dai)
{
	struct snd_soc_component *component = dai->component;

	return rk3228_codec_open_playback(component);
}

static void rk3228_pcm_shutdown(struct snd_pcm_substream *substream,
				struct snd_soc_dai *dai)
{
	struct snd_soc_component *component = dai->component;

	rk3228_codec_close_playback(component);
}

static struct snd_soc_dai_ops rk3228_dai_ops = {
	.hw_params = rk3228_hw_params,
	.set_fmt = rk3228_set_dai_fmt,
	.mute_stream = rk3228_digital_mute,
	.startup = rk3228_pcm_startup,
	.shutdown = rk3228_pcm_shutdown,
	.no_capture_mute = 1,
};

static struct snd_soc_dai_driver rk3228_dai[] = {
	{
		.name = "rk3228-hifi",
		.id = RK3228_HIFI,
		.playback = {
			.stream_name = "HIFI Playback",
			.channels_min = 1,
			.channels_max = 2,
			.rates = SNDRV_PCM_RATE_8000_96000,
			.formats = (SNDRV_PCM_FMTBIT_S16_LE |
				    SNDRV_PCM_FMTBIT_S20_3LE |
				    SNDRV_PCM_FMTBIT_S24_LE |
				    SNDRV_PCM_FMTBIT_S32_LE),
		},
		.capture = {
			.stream_name = "HIFI Capture",
			.channels_min = 2,
			.channels_max = 8,
			.rates = SNDRV_PCM_RATE_8000_96000,
			.formats = (SNDRV_PCM_FMTBIT_S16_LE |
				    SNDRV_PCM_FMTBIT_S20_3LE |
				    SNDRV_PCM_FMTBIT_S24_LE |
				    SNDRV_PCM_FMTBIT_S32_LE),
		},
		.ops = &rk3228_dai_ops,
	},
};

static int rk3228_codec_probe(struct snd_soc_component *component)
{
	rk3228_codec_reset(component);
	rk3228_codec_power_on(component, 0);

	return 0;
}

static void rk3228_codec_remove(struct snd_soc_component *component)
{
	rk3228_codec_close_playback(component);
	rk3228_codec_power_off(component, 0);
}

static struct snd_soc_component_driver soc_codec_dev_rk3228 = {
	.probe = rk3228_codec_probe,
	.remove = rk3228_codec_remove,
};

static bool rk3228_codec_write_read_reg(struct device *dev, unsigned int reg)
{
	switch (reg) {
	case CODEC_RESET:
	case DAC_INIT_CTRL1:
	case DAC_INIT_CTRL2:
	case DAC_INIT_CTRL3:
	case DAC_PRECHARGE_CTRL:
	case DAC_PWR_CTRL:
	case DAC_CLK_CTRL:
	case HPMIX_CTRL:
	case DAC_SELECT:
	case HPOUT_CTRL:
	case HPOUTL_GAIN_CTRL:
	case HPOUTR_GAIN_CTRL:
	case HPOUT_POP_CTRL:
		return true;
	default:
		return false;
	}
}

static bool rk3228_codec_volatile_reg(struct device *dev, unsigned int reg)
{
	switch (reg) {
	case CODEC_RESET:
		return true;
	default:
		return false;
	}
}

static const struct regmap_config rk3228_codec_regmap_config = {
	.reg_bits = 32,
	.reg_stride = 4,
	.val_bits = 32,
	.max_register = HPOUT_POP_CTRL,
	.writeable_reg = rk3228_codec_write_read_reg,
	.readable_reg = rk3228_codec_write_read_reg,
	.volatile_reg = rk3228_codec_volatile_reg,
	.reg_defaults = rk3228_codec_reg_defaults,
	.num_reg_defaults = ARRAY_SIZE(rk3228_codec_reg_defaults),
	.cache_type = REGCACHE_FLAT,
};

#ifdef CONFIG_OF
static const struct of_device_id rk3228codec_of_match[] = {
	{ .compatible = "rockchip,rk3228-codec", },
	{},
};
MODULE_DEVICE_TABLE(of, rk3228codec_of_match);
#endif

static int rk3228_platform_probe(struct platform_device *pdev)
{
	struct device_node *rk3228_np = pdev->dev.of_node;
	struct rk3228_codec_priv *rk3228;
	struct resource *res;
	void __iomem *base;
	int ret = 0;

	rk3228 = devm_kzalloc(&pdev->dev, sizeof(*rk3228), GFP_KERNEL);
	if (!rk3228)
		return -ENOMEM;

	rk3228->mclk = devm_clk_get(&pdev->dev, "mclk");
	if (PTR_ERR(rk3228->mclk) == -EPROBE_DEFER)
		return -EPROBE_DEFER;

	rk3228->pclk = devm_clk_get(&pdev->dev, "pclk");
	if (IS_ERR(rk3228->pclk))
		return PTR_ERR(rk3228->pclk);

	rk3228->sclk = devm_clk_get(&pdev->dev, "sclk");
	if (IS_ERR(rk3228->sclk))
		return PTR_ERR(rk3228->sclk);

	rk3228->spk_en_gpio = devm_gpiod_get_optional(&pdev->dev,
						      "spk-en",
						      GPIOD_OUT_LOW);
	if (IS_ERR(rk3228->spk_en_gpio))
		return PTR_ERR(rk3228->spk_en_gpio);

	ret = of_property_read_u32(rk3228_np, "spk-depop-time-ms",
				   &rk3228->spk_depop_time);
	if (ret < 0) {
		dev_info(&pdev->dev, "spk_depop_time use default value.\n");
		rk3228->spk_depop_time = 100;
	}

	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	base = devm_ioremap_resource(&pdev->dev, res);
	if (IS_ERR(base))
		return PTR_ERR(base);

	ret = clk_prepare_enable(rk3228->mclk);
	if (ret)
		return ret;

	ret = clk_prepare_enable(rk3228->pclk);
	if (ret < 0)
		goto err_pclk;

	ret = clk_prepare_enable(rk3228->sclk);
	if (ret)
		goto err_sclk;

	clk_set_rate(rk3228->sclk, INITIAL_FREQ);

	rk3228->regmap = devm_regmap_init_mmio(&pdev->dev, base,
					       &rk3228_codec_regmap_config);
	if (IS_ERR(rk3228->regmap)) {
		ret = PTR_ERR(rk3228->regmap);
		goto err_clk;
	}

	platform_set_drvdata(pdev, rk3228);

	ret = devm_snd_soc_register_component(&pdev->dev, &soc_codec_dev_rk3228,
					      rk3228_dai, ARRAY_SIZE(rk3228_dai));
	if (!ret)
		return 0;

err_clk:
	clk_disable_unprepare(rk3228->sclk);
err_sclk:
	clk_disable_unprepare(rk3228->pclk);
err_pclk:
	clk_disable_unprepare(rk3228->mclk);

	return ret;
}

static int rk3228_platform_remove(struct platform_device *pdev)
{
	struct rk3228_codec_priv *rk3228 = platform_get_drvdata(pdev);

	if (!IS_ERR(rk3228->mclk))
		clk_disable_unprepare(rk3228->mclk);

	if (!IS_ERR(rk3228->pclk))
		clk_disable_unprepare(rk3228->pclk);

	if (!IS_ERR(rk3228->sclk))
		clk_disable_unprepare(rk3228->sclk);

	return 0;
}

static struct platform_driver rk3228_codec_driver = {
	.driver = {
		   .name = "rk3228-codec",
		   .of_match_table = of_match_ptr(rk3228codec_of_match),
	},
	.probe = rk3228_platform_probe,
	.remove = rk3228_platform_remove,
};
module_platform_driver(rk3228_codec_driver);

MODULE_AUTHOR("Sugar Zhang <sugar.zhang@rock-chips.com>");
MODULE_DESCRIPTION("ASoC rk3228 codec driver");
MODULE_LICENSE("GPL v2");