text: // SPDX-License-Identifier: GPL-2.0-only
  //
  // rt5682.c  --  RT5682 ALSA SoC audio component driver
  //
  // Copyright 2018 Realtek Semiconductor Corp.
  // Author: Bard Liao <bardliao@realtek.com>
  //
  
  #include <linux/module.h>
  #include <linux/moduleparam.h>
  #include <linux/init.h>
  #include <linux/delay.h>
  #include <linux/pm.h>
  #include <linux/pm_runtime.h>
  #include <linux/i2c.h>
  #include <linux/platform_device.h>
  #include <linux/spi/spi.h>
  #include <linux/acpi.h>
  #include <linux/gpio.h>
  #include <linux/of_gpio.h>
  #include <linux/mutex.h>
  #include <sound/core.h>
  #include <sound/pcm.h>
  #include <sound/pcm_params.h>
  #include <sound/jack.h>
  #include <sound/soc.h>
  #include <sound/soc-dapm.h>
  #include <sound/initval.h>
  #include <sound/tlv.h>
  #include <sound/rt5682.h>
  
  #include "rl6231.h"
  #include "rt5682.h"
  
  static const struct rt5682_platform_data i2s_default_platform_data = {
  	.dmic1_data_pin = RT5682_DMIC1_DATA_GPIO2,
  	.dmic1_clk_pin = RT5682_DMIC1_CLK_GPIO3,
  	.jd_src = RT5682_JD1,
  	.btndet_delay = 16,
  	.dai_clk_names[RT5682_DAI_WCLK_IDX] = "rt5682-dai-wclk",
  	.dai_clk_names[RT5682_DAI_BCLK_IDX] = "rt5682-dai-bclk",
  };
  
  static const struct regmap_config rt5682_regmap = {
  	.reg_bits = 16,
  	.val_bits = 16,
  	.max_register = RT5682_I2C_MODE,
  	.volatile_reg = rt5682_volatile_register,
  	.readable_reg = rt5682_readable_register,
  	.cache_type = REGCACHE_RBTREE,
  	.reg_defaults = rt5682_reg,
  	.num_reg_defaults = RT5682_REG_NUM,
  	.use_single_read = true,
  	.use_single_write = true,
  };
  
  static void rt5682_jd_check_handler(struct work_struct *work)
  {
  	struct rt5682_priv *rt5682 = container_of(work, struct rt5682_priv,
  		jd_check_work.work);
  
  	if (snd_soc_component_read(rt5682->component, RT5682_AJD1_CTRL)
  		& RT5682_JDH_RS_MASK) {
  		/* jack out */
  		rt5682->jack_type = rt5682_headset_detect(rt5682->component, 0);
  
  		snd_soc_jack_report(rt5682->hs_jack, rt5682->jack_type,
  			SND_JACK_HEADSET |
  			SND_JACK_BTN_0 | SND_JACK_BTN_1 |
  			SND_JACK_BTN_2 | SND_JACK_BTN_3);
  	} else {
  		schedule_delayed_work(&rt5682->jd_check_work, 500);
  	}
  }
  
  static irqreturn_t rt5682_irq(int irq, void *data)
  {
  	struct rt5682_priv *rt5682 = data;
  
  	mod_delayed_work(system_power_efficient_wq,
  		&rt5682->jack_detect_work, msecs_to_jiffies(rt5682->irq_work_delay_time));
  
  	return IRQ_HANDLED;
  }
  
  static struct snd_soc_dai_driver rt5682_dai[] = {
  	{
  		.name = "rt5682-aif1",
  		.id = RT5682_AIF1,
  		.playback = {
  			.stream_name = "AIF1 Playback",
  			.channels_min = 1,
  			.channels_max = 2,
  			.rates = RT5682_STEREO_RATES,
  			.formats = RT5682_FORMATS,
  		},
  		.capture = {
  			.stream_name = "AIF1 Capture",
  			.channels_min = 1,
  			.channels_max = 2,
  			.rates = RT5682_STEREO_RATES,
  			.formats = RT5682_FORMATS,
  		},
  		.ops = &rt5682_aif1_dai_ops,
  	},
  	{
  		.name = "rt5682-aif2",
  		.id = RT5682_AIF2,
  		.capture = {
  			.stream_name = "AIF2 Capture",
  			.channels_min = 1,
  			.channels_max = 2,
  			.rates = RT5682_STEREO_RATES,
  			.formats = RT5682_FORMATS,
  		},
  		.ops = &rt5682_aif2_dai_ops,
  	},
  };
  
  static int rt5682_i2c_probe(struct i2c_client *i2c,
  		const struct i2c_device_id *id)
  {
  	struct rt5682_platform_data *pdata = dev_get_platdata(&i2c->dev);
  	struct rt5682_priv *rt5682;
  	int i, ret;
  	unsigned int val;
  
  	rt5682 = devm_kzalloc(&i2c->dev, sizeof(struct rt5682_priv),
  		GFP_KERNEL);
  	if (!rt5682)
  		return -ENOMEM;
  
  	i2c_set_clientdata(i2c, rt5682);
  
  	rt5682->pdata = i2s_default_platform_data;
  
  	if (pdata)
  		rt5682->pdata = *pdata;
  	else
  		rt5682_parse_dt(rt5682, &i2c->dev);
  
  	rt5682->regmap = devm_regmap_init_i2c(i2c, &rt5682_regmap);
  	if (IS_ERR(rt5682->regmap)) {
  		ret = PTR_ERR(rt5682->regmap);
  		dev_err(&i2c->dev, "Failed to allocate register map: %d\n",
  			ret);
  		return ret;
  	}
  
  	for (i = 0; i < ARRAY_SIZE(rt5682->supplies); i++)
  		rt5682->supplies[i].supply = rt5682_supply_names[i];
  
  	ret = devm_regulator_bulk_get(&i2c->dev, ARRAY_SIZE(rt5682->supplies),
  				      rt5682->supplies);
  	if (ret) {
  		dev_err(&i2c->dev, "Failed to request supplies: %d\n", ret);
  		return ret;
  	}
  
  	ret = regulator_bulk_enable(ARRAY_SIZE(rt5682->supplies),
  				    rt5682->supplies);
  	if (ret) {
  		dev_err(&i2c->dev, "Failed to enable supplies: %d\n", ret);
  		return ret;
  	}
  
  	if (gpio_is_valid(rt5682->pdata.ldo1_en)) {
  		if (devm_gpio_request_one(&i2c->dev, rt5682->pdata.ldo1_en,
  					  GPIOF_OUT_INIT_HIGH, "rt5682"))
  			dev_err(&i2c->dev, "Fail gpio_request gpio_ldo\n");
  	}
  
  	/* Sleep for 300 ms miniumum */
  	usleep_range(300000, 350000);
  
  	regmap_write(rt5682->regmap, RT5682_I2C_MODE, 0x1);
  	usleep_range(10000, 15000);
  
  	regmap_read(rt5682->regmap, RT5682_DEVICE_ID, &val);
  	if (val != DEVICE_ID) {
  		dev_err(&i2c->dev,
  			"Device with ID register %x is not rt5682\n", val);
  		return -ENODEV;
  	}
  
  	mutex_init(&rt5682->calibrate_mutex);
  	rt5682_calibrate(rt5682);
  
  	rt5682_apply_patch_list(rt5682, &i2c->dev);
  
  	regmap_write(rt5682->regmap, RT5682_DEPOP_1, 0x0000);
  
  	/* DMIC pin*/
  	if (rt5682->pdata.dmic1_data_pin != RT5682_DMIC1_NULL) {
  		switch (rt5682->pdata.dmic1_data_pin) {
  		case RT5682_DMIC1_DATA_GPIO2: /* share with LRCK2 */
  			regmap_update_bits(rt5682->regmap, RT5682_DMIC_CTRL_1,
  				RT5682_DMIC_1_DP_MASK, RT5682_DMIC_1_DP_GPIO2);
  			regmap_update_bits(rt5682->regmap, RT5682_GPIO_CTRL_1,
  				RT5682_GP2_PIN_MASK, RT5682_GP2_PIN_DMIC_SDA);
  			break;
  
  		case RT5682_DMIC1_DATA_GPIO5: /* share with DACDAT1 */
  			regmap_update_bits(rt5682->regmap, RT5682_DMIC_CTRL_1,
  				RT5682_DMIC_1_DP_MASK, RT5682_DMIC_1_DP_GPIO5);
  			regmap_update_bits(rt5682->regmap, RT5682_GPIO_CTRL_1,
  				RT5682_GP5_PIN_MASK, RT5682_GP5_PIN_DMIC_SDA);
  			break;
  
  		default:
  			dev_warn(&i2c->dev, "invalid DMIC_DAT pin\n");
  			break;
  		}
  
  		switch (rt5682->pdata.dmic1_clk_pin) {
  		case RT5682_DMIC1_CLK_GPIO1: /* share with IRQ */
  			regmap_update_bits(rt5682->regmap, RT5682_GPIO_CTRL_1,
  				RT5682_GP1_PIN_MASK, RT5682_GP1_PIN_DMIC_CLK);
  			break;
  
  		case RT5682_DMIC1_CLK_GPIO3: /* share with BCLK2 */
  			regmap_update_bits(rt5682->regmap, RT5682_GPIO_CTRL_1,
  				RT5682_GP3_PIN_MASK, RT5682_GP3_PIN_DMIC_CLK);
  			if (rt5682->pdata.dmic_clk_driving_high)
  				regmap_update_bits(rt5682->regmap,
  					RT5682_PAD_DRIVING_CTRL,
  					RT5682_PAD_DRV_GP3_MASK,
  					2 << RT5682_PAD_DRV_GP3_SFT);
  			break;
  
  		default:
  			dev_warn(&i2c->dev, "invalid DMIC_CLK pin\n");
  			break;
  		}
  	}
  
  	regmap_update_bits(rt5682->regmap, RT5682_PWR_ANLG_1,
  		RT5682_LDO1_DVO_MASK | RT5682_HP_DRIVER_MASK,
  		RT5682_LDO1_DVO_12 | RT5682_HP_DRIVER_5X);
  	regmap_write(rt5682->regmap, RT5682_MICBIAS_2, 0x0080);
  	regmap_update_bits(rt5682->regmap, RT5682_GPIO_CTRL_1,
  		RT5682_GP4_PIN_MASK | RT5682_GP5_PIN_MASK,
  		RT5682_GP4_PIN_ADCDAT1 | RT5682_GP5_PIN_DACDAT1);
  	regmap_write(rt5682->regmap, RT5682_TEST_MODE_CTRL_1, 0x0000);
  	regmap_update_bits(rt5682->regmap, RT5682_BIAS_CUR_CTRL_8,
  		RT5682_HPA_CP_BIAS_CTRL_MASK, RT5682_HPA_CP_BIAS_3UA);
  	regmap_update_bits(rt5682->regmap, RT5682_CHARGE_PUMP_1,
  		RT5682_CP_CLK_HP_MASK, RT5682_CP_CLK_HP_300KHZ);
  	regmap_update_bits(rt5682->regmap, RT5682_HP_CHARGE_PUMP_1,
  		RT5682_PM_HP_MASK, RT5682_PM_HP_HV);
  	regmap_update_bits(rt5682->regmap, RT5682_DMIC_CTRL_1,
  		RT5682_FIFO_CLK_DIV_MASK, RT5682_FIFO_CLK_DIV_2);
  
  	INIT_DELAYED_WORK(&rt5682->jack_detect_work,
  		rt5682_jack_detect_handler);
  	INIT_DELAYED_WORK(&rt5682->jd_check_work,
  		rt5682_jd_check_handler);
  
  	if (i2c->irq) {
  		ret = devm_request_threaded_irq(&i2c->dev, i2c->irq, NULL,
  			rt5682_irq, IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING
  			| IRQF_ONESHOT, "rt5682", rt5682);
  		if (ret)
  			dev_err(&i2c->dev, "Failed to reguest IRQ: %d\n", ret);
  	}
  
  	return devm_snd_soc_register_component(&i2c->dev,
  					       &rt5682_soc_component_dev,
  					       rt5682_dai, ARRAY_SIZE(rt5682_dai));
  }
  
  static void rt5682_i2c_shutdown(struct i2c_client *client)
  {
  	struct rt5682_priv *rt5682 = i2c_get_clientdata(client);
  
  	disable_irq(client->irq);
  	cancel_delayed_work_sync(&rt5682->jack_detect_work);
  	cancel_delayed_work_sync(&rt5682->jd_check_work);
  
  	rt5682_reset(rt5682);
  }
  
  static const struct of_device_id rt5682_of_match[] = {
  	{.compatible = "realtek,rt5682i"},
  	{},
  };
  MODULE_DEVICE_TABLE(of, rt5682_of_match);
  
  static const struct acpi_device_id rt5682_acpi_match[] = {
  	{"10EC5682", 0,},
  	{},
  };
  MODULE_DEVICE_TABLE(acpi, rt5682_acpi_match);
  
  static const struct i2c_device_id rt5682_i2c_id[] = {
  	{"rt5682", 0},
  	{}
  };
  MODULE_DEVICE_TABLE(i2c, rt5682_i2c_id);
  
  static struct i2c_driver rt5682_i2c_driver = {
  	.driver = {
  		.name = "rt5682",
  		.of_match_table = rt5682_of_match,
  		.acpi_match_table = rt5682_acpi_match,
  		.probe_type = PROBE_PREFER_ASYNCHRONOUS,
  	},
  	.probe = rt5682_i2c_probe,
  	.shutdown = rt5682_i2c_shutdown,
  	.id_table = rt5682_i2c_id,
  };
  module_i2c_driver(rt5682_i2c_driver);
  
  MODULE_DESCRIPTION("ASoC RT5682 driver");
  MODULE_AUTHOR("Bard Liao <bardliao@realtek.com>");
  MODULE_LICENSE("GPL v2");
  