sound/soc/codecs/ts3a227e.c - linux - Git at Google

 // SPDX-License-Identifier: GPL-2.0-only
 /*
  * TS3A227E Autonomous Audio Accessory Detection and Configuration Switch
  *
  * Copyright (C) 2014 Google, Inc.
  */

 #include <linux/gpio.h>
 #include <linux/i2c.h>
 #include <linux/init.h>
 #include <linux/input.h>
 #include <linux/module.h>
 #include <linux/regmap.h>
 #include <linux/acpi.h>

 #include <sound/core.h>
 #include <sound/jack.h>
 #include <sound/soc.h>

 #include "ts3a227e.h"

 struct ts3a227e {
 	struct device *dev;
 	struct regmap *regmap;
 	struct snd_soc_jack *jack;
 	bool plugged;
 	bool mic_present;
 	unsigned int buttons_held;
 	int irq;
 };

 /* Button values to be reported on the jack */
 static const int ts3a227e_buttons[] = {
 	SND_JACK_BTN_0,
 	SND_JACK_BTN_1,
 	SND_JACK_BTN_2,
 	SND_JACK_BTN_3,
 };

 #define TS3A227E_NUM_BUTTONS 4
 #define TS3A227E_JACK_MASK (SND_JACK_HEADPHONE | \
 			    SND_JACK_MICROPHONE | \
 			    SND_JACK_BTN_0 | \
 			    SND_JACK_BTN_1 | \
 			    SND_JACK_BTN_2 | \
 			    SND_JACK_BTN_3)

 /* TS3A227E registers */
 #define TS3A227E_REG_DEVICE_ID		0x00
 #define TS3A227E_REG_INTERRUPT		0x01
 #define TS3A227E_REG_KP_INTERRUPT	0x02
 #define TS3A227E_REG_INTERRUPT_DISABLE	0x03
 #define TS3A227E_REG_SETTING_1		0x04
 #define TS3A227E_REG_SETTING_2		0x05
 #define TS3A227E_REG_SETTING_3		0x06
 #define TS3A227E_REG_SWITCH_CONTROL_1	0x07
 #define TS3A227E_REG_SWITCH_CONTROL_2	0x08
 #define TS3A227E_REG_SWITCH_STATUS_1	0x09
 #define TS3A227E_REG_SWITCH_STATUS_2	0x0a
 #define TS3A227E_REG_ACCESSORY_STATUS	0x0b
 #define TS3A227E_REG_ADC_OUTPUT		0x0c
 #define TS3A227E_REG_KP_THRESHOLD_1	0x0d
 #define TS3A227E_REG_KP_THRESHOLD_2	0x0e
 #define TS3A227E_REG_KP_THRESHOLD_3	0x0f

 /* TS3A227E_REG_INTERRUPT 0x01 */
 #define INS_REM_EVENT 0x01
 #define DETECTION_COMPLETE_EVENT 0x02

 /* TS3A227E_REG_KP_INTERRUPT 0x02 */
 #define PRESS_MASK(idx) (0x01 << (2 * (idx)))
 #define RELEASE_MASK(idx) (0x02 << (2 * (idx)))

 /* TS3A227E_REG_INTERRUPT_DISABLE 0x03 */
 #define INS_REM_INT_DISABLE 0x01
 #define DETECTION_COMPLETE_INT_DISABLE 0x02
 #define ADC_COMPLETE_INT_DISABLE 0x04
 #define INTB_DISABLE 0x08

 /* TS3A227E_REG_SETTING_1 0x4 */
 #define DEBOUNCE_INSERTION_SETTING_SFT (0)
 #define DEBOUNCE_INSERTION_SETTING_MASK (0x7 << DEBOUNCE_PRESS_SETTING_SFT)

 /* TS3A227E_REG_SETTING_2 0x05 */
 #define KP_ENABLE 0x04

 /* TS3A227E_REG_SETTING_3 0x06 */
 #define MICBIAS_SETTING_SFT 3
 #define MICBIAS_SETTING_MASK (0x7 << MICBIAS_SETTING_SFT)
 #define DEBOUNCE_RELEASE_SETTING_SFT 2
 #define DEBOUNCE_RELEASE_SETTING_MASK (0x1 << DEBOUNCE_RELEASE_SETTING_SFT)
 #define DEBOUNCE_PRESS_SETTING_SFT 0
 #define DEBOUNCE_PRESS_SETTING_MASK (0x3 << DEBOUNCE_PRESS_SETTING_SFT)

 /* TS3A227E_REG_ACCESSORY_STATUS  0x0b */
 #define TYPE_3_POLE 0x01
 #define TYPE_4_POLE_OMTP 0x02
 #define TYPE_4_POLE_STANDARD 0x04
 #define JACK_INSERTED 0x08
 #define EITHER_MIC_MASK (TYPE_4_POLE_OMTP | TYPE_4_POLE_STANDARD)

 static const struct reg_default ts3a227e_reg_defaults[] = {
 	{ TS3A227E_REG_DEVICE_ID, 0x10 },
 	{ TS3A227E_REG_INTERRUPT, 0x00 },
 	{ TS3A227E_REG_KP_INTERRUPT, 0x00 },
 	{ TS3A227E_REG_INTERRUPT_DISABLE, 0x08 },
 	{ TS3A227E_REG_SETTING_1, 0x23 },
 	{ TS3A227E_REG_SETTING_2, 0x00 },
 	{ TS3A227E_REG_SETTING_3, 0x0e },
 	{ TS3A227E_REG_SWITCH_CONTROL_1, 0x00 },
 	{ TS3A227E_REG_SWITCH_CONTROL_2, 0x00 },
 	{ TS3A227E_REG_SWITCH_STATUS_1, 0x0c },
 	{ TS3A227E_REG_SWITCH_STATUS_2, 0x00 },
 	{ TS3A227E_REG_ACCESSORY_STATUS, 0x00 },
 	{ TS3A227E_REG_ADC_OUTPUT, 0x00 },
 	{ TS3A227E_REG_KP_THRESHOLD_1, 0x20 },
 	{ TS3A227E_REG_KP_THRESHOLD_2, 0x40 },
 	{ TS3A227E_REG_KP_THRESHOLD_3, 0x68 },
 };

 static bool ts3a227e_readable_reg(struct device *dev, unsigned int reg)
 {
 	switch (reg) {
 	case TS3A227E_REG_DEVICE_ID ... TS3A227E_REG_KP_THRESHOLD_3:
 		return true;
 	default:
 		return false;
 	}
 }

 static bool ts3a227e_writeable_reg(struct device *dev, unsigned int reg)
 {
 	switch (reg) {
 	case TS3A227E_REG_INTERRUPT_DISABLE ... TS3A227E_REG_SWITCH_CONTROL_2:
 	case TS3A227E_REG_KP_THRESHOLD_1 ... TS3A227E_REG_KP_THRESHOLD_3:
 		return true;
 	default:
 		return false;
 	}
 }

 static bool ts3a227e_volatile_reg(struct device *dev, unsigned int reg)
 {
 	switch (reg) {
 	case TS3A227E_REG_INTERRUPT ... TS3A227E_REG_INTERRUPT_DISABLE:
 	case TS3A227E_REG_SETTING_1 ... TS3A227E_REG_SETTING_2:
 	case TS3A227E_REG_SWITCH_STATUS_1 ... TS3A227E_REG_ADC_OUTPUT:
 		return true;
 	default:
 		return false;
 	}
 }

 static void ts3a227e_jack_report(struct ts3a227e *ts3a227e)
 {
 	unsigned int i;
 	int report = 0;

 	if (!ts3a227e->jack)
 		return;

 	if (ts3a227e->plugged)
 		report = SND_JACK_HEADPHONE;
 	if (ts3a227e->mic_present)
 		report |= SND_JACK_MICROPHONE;
 	for (i = 0; i < TS3A227E_NUM_BUTTONS; i++) {
 		if (ts3a227e->buttons_held & (1 << i))
 			report |= ts3a227e_buttons[i];
 	}
 	snd_soc_jack_report(ts3a227e->jack, report, TS3A227E_JACK_MASK);
 }

 static void ts3a227e_new_jack_state(struct ts3a227e *ts3a227e, unsigned acc_reg)
 {
 	bool plugged, mic_present;

 	plugged = !!(acc_reg & JACK_INSERTED);
 	mic_present = plugged && !!(acc_reg & EITHER_MIC_MASK);

 	ts3a227e->plugged = plugged;

 	if (mic_present != ts3a227e->mic_present) {
 		ts3a227e->mic_present = mic_present;
 		ts3a227e->buttons_held = 0;
 		if (mic_present) {
 			/* Enable key press detection. */
 			regmap_update_bits(ts3a227e->regmap,
 					   TS3A227E_REG_SETTING_2,
 					   KP_ENABLE, KP_ENABLE);
 		}
 	}
 }

 static irqreturn_t ts3a227e_interrupt(int irq, void *data)
 {
 	struct ts3a227e *ts3a227e = (struct ts3a227e *)data;
 	struct regmap *regmap = ts3a227e->regmap;
 	unsigned int int_reg, kp_int_reg, acc_reg, i;
 	struct device *dev = ts3a227e->dev;
 	int ret;

 	/* Check for plug/unplug. */
 	ret = regmap_read(regmap, TS3A227E_REG_INTERRUPT, &int_reg);
 	if (ret) {
 		dev_err(dev, "failed to clear interrupt ret=%d\n", ret);
 		return IRQ_NONE;
 	}

 	if (int_reg & (DETECTION_COMPLETE_EVENT | INS_REM_EVENT)) {
 		regmap_read(regmap, TS3A227E_REG_ACCESSORY_STATUS, &acc_reg);
 		ts3a227e_new_jack_state(ts3a227e, acc_reg);
 	}

 	/* Report any key events. */
 	ret = regmap_read(regmap, TS3A227E_REG_KP_INTERRUPT, &kp_int_reg);
 	if (ret) {
 		dev_err(dev, "failed to clear key interrupt ret=%d\n", ret);
 		return IRQ_NONE;
 	}

 	for (i = 0; i < TS3A227E_NUM_BUTTONS; i++) {
 		if (kp_int_reg & PRESS_MASK(i))
 			ts3a227e->buttons_held |= (1 << i);
 		if (kp_int_reg & RELEASE_MASK(i))
 			ts3a227e->buttons_held &= ~(1 << i);
 	}

 	ts3a227e_jack_report(ts3a227e);

 	return IRQ_HANDLED;
 }

 /**
  * ts3a227e_enable_jack_detect - Specify a jack for event reporting
  *
  * @component:  component to register the jack with
  * @jack: jack to use to report headset and button events on
  *
  * After this function has been called the headset insert/remove and button
  * events 0-3 will be routed to the given jack.  Jack can be null to stop
  * reporting.
  */
 int ts3a227e_enable_jack_detect(struct snd_soc_component *component,
 				struct snd_soc_jack *jack)
 {
 	struct ts3a227e *ts3a227e = snd_soc_component_get_drvdata(component);

 	snd_jack_set_key(jack->jack, SND_JACK_BTN_0, KEY_PLAYPAUSE);
 	snd_jack_set_key(jack->jack, SND_JACK_BTN_1, KEY_VOICECOMMAND);
 	snd_jack_set_key(jack->jack, SND_JACK_BTN_2, KEY_VOLUMEUP);
 	snd_jack_set_key(jack->jack, SND_JACK_BTN_3, KEY_VOLUMEDOWN);

 	ts3a227e->jack = jack;
 	ts3a227e_jack_report(ts3a227e);

 	return 0;
 }
 EXPORT_SYMBOL_GPL(ts3a227e_enable_jack_detect);

 static int ts3a227e_set_jack(struct snd_soc_component *component,
 			     struct snd_soc_jack *jack, void *data)
 {
 	if (jack == NULL)
 		return -EINVAL;

 	return ts3a227e_enable_jack_detect(component, jack);
 }

 static int ts3a227e_get_jack_type(struct snd_soc_component *component)
 {
 	return SND_JACK_HEADSET;
 }

 static const struct snd_soc_component_driver ts3a227e_soc_driver = {
 	.name = "ti,ts3a227e",
 	.set_jack = ts3a227e_set_jack,
 	.get_jack_type = ts3a227e_get_jack_type,
 };

 static const struct regmap_config ts3a227e_regmap_config = {
 	.val_bits = 8,
 	.reg_bits = 8,

 	.max_register = TS3A227E_REG_KP_THRESHOLD_3,
 	.readable_reg = ts3a227e_readable_reg,
 	.writeable_reg = ts3a227e_writeable_reg,
 	.volatile_reg = ts3a227e_volatile_reg,

 	.cache_type = REGCACHE_RBTREE,
 	.reg_defaults = ts3a227e_reg_defaults,
 	.num_reg_defaults = ARRAY_SIZE(ts3a227e_reg_defaults),
 };

 static int ts3a227e_parse_device_property(struct ts3a227e *ts3a227e,
 				struct device *dev)
 {
 	u32 value;
 	u32 value_ms;
 	u32 setting3_value = 0;
 	u32 setting3_mask = 0;
 	int err;

 	err = device_property_read_u32(dev, "ti,micbias", &value);
 	if (!err) {
 		setting3_mask = MICBIAS_SETTING_MASK;
 		setting3_value = (value << MICBIAS_SETTING_SFT) &
 				 MICBIAS_SETTING_MASK;
 	}

 	err = device_property_read_u32(dev, "ti,debounce-release-ms",
 				       &value_ms);
 	if (!err) {
 		value = (value_ms > 10);
 		setting3_mask |= DEBOUNCE_RELEASE_SETTING_MASK;
 		setting3_value |= (value << DEBOUNCE_RELEASE_SETTING_SFT) &
 				  DEBOUNCE_RELEASE_SETTING_MASK;
 	}

 	err = device_property_read_u32(dev, "ti,debounce-press-ms", &value_ms);
 	if (!err) {
 		value = (value_ms + 20) / 40;
 		if (value > 3)
 			value = 3;
 		setting3_mask |= DEBOUNCE_PRESS_SETTING_MASK;
 		setting3_value |= (value << DEBOUNCE_PRESS_SETTING_SFT) &
 				  DEBOUNCE_PRESS_SETTING_MASK;
 	}

 	if (setting3_mask)
 		regmap_update_bits(ts3a227e->regmap, TS3A227E_REG_SETTING_3,
 				   setting3_mask, setting3_value);

 	err = device_property_read_u32(dev, "ti,debounce-insertion-ms",
 				       &value_ms);
 	if (!err) {
 		if (value_ms < 165)
 			value = (value_ms + 15) / 30;
 		else if (value_ms < 1500)
 			value = 6;
 		else
 			value = 7;
 		regmap_update_bits(ts3a227e->regmap, TS3A227E_REG_SETTING_1,
 				   DEBOUNCE_INSERTION_SETTING_MASK,
 				   (value << DEBOUNCE_INSERTION_SETTING_SFT) &
 					   DEBOUNCE_INSERTION_SETTING_MASK);
 	}

 	return 0;
 }

 static int ts3a227e_i2c_probe(struct i2c_client *i2c)
 {
 	struct ts3a227e *ts3a227e;
 	struct device *dev = &i2c->dev;
 	int ret;
 	unsigned int acc_reg;

 	ts3a227e = devm_kzalloc(&i2c->dev, sizeof(*ts3a227e), GFP_KERNEL);
 	if (ts3a227e == NULL)
 		return -ENOMEM;

 	i2c_set_clientdata(i2c, ts3a227e);
 	ts3a227e->dev = dev;
 	ts3a227e->irq = i2c->irq;

 	ts3a227e->regmap = devm_regmap_init_i2c(i2c, &ts3a227e_regmap_config);
 	if (IS_ERR(ts3a227e->regmap))
 		return PTR_ERR(ts3a227e->regmap);

 	ret = ts3a227e_parse_device_property(ts3a227e, dev);
 	if (ret) {
 		dev_err(dev, "Failed to parse device property: %d\n", ret);
 		return ret;
 	}

 	ret = devm_request_threaded_irq(dev, i2c->irq, NULL, ts3a227e_interrupt,
 					IRQF_TRIGGER_LOW | IRQF_ONESHOT,
 					"TS3A227E", ts3a227e);
 	if (ret) {
 		dev_err(dev, "Cannot request irq %d (%d)\n", i2c->irq, ret);
 		return ret;
 	}

 	ret = devm_snd_soc_register_component(&i2c->dev, &ts3a227e_soc_driver,
 					      NULL, 0);
 	if (ret)
 		return ret;

 	/* Enable interrupts except for ADC complete. */
 	regmap_update_bits(ts3a227e->regmap, TS3A227E_REG_INTERRUPT_DISABLE,
 			   INTB_DISABLE | ADC_COMPLETE_INT_DISABLE,
 			   ADC_COMPLETE_INT_DISABLE);

 	/* Read jack status because chip might not trigger interrupt at boot. */
 	regmap_read(ts3a227e->regmap, TS3A227E_REG_ACCESSORY_STATUS, &acc_reg);
 	ts3a227e_new_jack_state(ts3a227e, acc_reg);
 	ts3a227e_jack_report(ts3a227e);

 	return 0;
 }

 #ifdef CONFIG_PM_SLEEP
 static int ts3a227e_suspend(struct device *dev)
 {
 	struct ts3a227e *ts3a227e = dev_get_drvdata(dev);

 	dev_dbg(ts3a227e->dev, "suspend disable irq\n");
 	disable_irq(ts3a227e->irq);

 	return 0;
 }

 static int ts3a227e_resume(struct device *dev)
 {
 	struct ts3a227e *ts3a227e = dev_get_drvdata(dev);

 	dev_dbg(ts3a227e->dev, "resume enable irq\n");
 	enable_irq(ts3a227e->irq);

 	return 0;
 }
 #endif

 static const struct dev_pm_ops ts3a227e_pm = {
 	SET_SYSTEM_SLEEP_PM_OPS(ts3a227e_suspend, ts3a227e_resume)
 };

 static const struct i2c_device_id ts3a227e_i2c_ids[] = {
 	{ "ts3a227e" },
 	{ }
 };
 MODULE_DEVICE_TABLE(i2c, ts3a227e_i2c_ids);

 #ifdef CONFIG_OF
 static const struct of_device_id ts3a227e_of_match[] = {
 	{ .compatible = "ti,ts3a227e", },
 	{ }
 };
 MODULE_DEVICE_TABLE(of, ts3a227e_of_match);
 #endif

 #ifdef CONFIG_ACPI
 static struct acpi_device_id ts3a227e_acpi_match[] = {
 	{ "104C227E", 0 },
 	{},
 };
 MODULE_DEVICE_TABLE(acpi, ts3a227e_acpi_match);
 #endif

 static struct i2c_driver ts3a227e_driver = {
 	.driver = {
 		.name = "ts3a227e",
 		.pm = &ts3a227e_pm,
 		.of_match_table = of_match_ptr(ts3a227e_of_match),
 		.acpi_match_table = ACPI_PTR(ts3a227e_acpi_match),
 	},
 	.probe = ts3a227e_i2c_probe,
 	.id_table = ts3a227e_i2c_ids,
 };
 module_i2c_driver(ts3a227e_driver);

 MODULE_DESCRIPTION("ASoC ts3a227e driver");
 MODULE_AUTHOR("Dylan Reid <dgreid@chromium.org>");
 MODULE_LICENSE("GPL v2");
	// SPDX-License-Identifier: GPL-2.0-only
	/*
	* TS3A227E Autonomous Audio Accessory Detection and Configuration Switch
	*
	* Copyright (C) 2014 Google, Inc.
	*/

	#include <linux/gpio.h>
	#include <linux/i2c.h>
	#include <linux/init.h>
	#include <linux/input.h>
	#include <linux/module.h>
	#include <linux/regmap.h>
	#include <linux/acpi.h>

	#include <sound/core.h>
	#include <sound/jack.h>
	#include <sound/soc.h>

	#include "ts3a227e.h"

	struct ts3a227e {
	struct device *dev;
	struct regmap *regmap;
	struct snd_soc_jack *jack;
	bool plugged;
	bool mic_present;
	unsigned int buttons_held;
	int irq;
	};

	/* Button values to be reported on the jack */
	static const int ts3a227e_buttons[] = {
	SND_JACK_BTN_0,
	SND_JACK_BTN_1,
	SND_JACK_BTN_2,
	SND_JACK_BTN_3,
	};

	#define TS3A227E_NUM_BUTTONS 4
	#define TS3A227E_JACK_MASK (SND_JACK_HEADPHONE \| \
	SND_JACK_MICROPHONE \| \
	SND_JACK_BTN_0 \| \
	SND_JACK_BTN_1 \| \
	SND_JACK_BTN_2 \| \
	SND_JACK_BTN_3)

	/* TS3A227E registers */
	#define TS3A227E_REG_DEVICE_ID 0x00
	#define TS3A227E_REG_INTERRUPT 0x01
	#define TS3A227E_REG_KP_INTERRUPT 0x02
	#define TS3A227E_REG_INTERRUPT_DISABLE 0x03
	#define TS3A227E_REG_SETTING_1 0x04
	#define TS3A227E_REG_SETTING_2 0x05
	#define TS3A227E_REG_SETTING_3 0x06
	#define TS3A227E_REG_SWITCH_CONTROL_1 0x07
	#define TS3A227E_REG_SWITCH_CONTROL_2 0x08
	#define TS3A227E_REG_SWITCH_STATUS_1 0x09
	#define TS3A227E_REG_SWITCH_STATUS_2 0x0a
	#define TS3A227E_REG_ACCESSORY_STATUS 0x0b
	#define TS3A227E_REG_ADC_OUTPUT 0x0c
	#define TS3A227E_REG_KP_THRESHOLD_1 0x0d
	#define TS3A227E_REG_KP_THRESHOLD_2 0x0e
	#define TS3A227E_REG_KP_THRESHOLD_3 0x0f

	/* TS3A227E_REG_INTERRUPT 0x01 */
	#define INS_REM_EVENT 0x01
	#define DETECTION_COMPLETE_EVENT 0x02

	/* TS3A227E_REG_KP_INTERRUPT 0x02 */
	#define PRESS_MASK(idx) (0x01 << (2 * (idx)))
	#define RELEASE_MASK(idx) (0x02 << (2 * (idx)))

	/* TS3A227E_REG_INTERRUPT_DISABLE 0x03 */
	#define INS_REM_INT_DISABLE 0x01
	#define DETECTION_COMPLETE_INT_DISABLE 0x02
	#define ADC_COMPLETE_INT_DISABLE 0x04
	#define INTB_DISABLE 0x08

	/* TS3A227E_REG_SETTING_1 0x4 */
	#define DEBOUNCE_INSERTION_SETTING_SFT (0)
	#define DEBOUNCE_INSERTION_SETTING_MASK (0x7 << DEBOUNCE_PRESS_SETTING_SFT)

	/* TS3A227E_REG_SETTING_2 0x05 */
	#define KP_ENABLE 0x04

	/* TS3A227E_REG_SETTING_3 0x06 */
	#define MICBIAS_SETTING_SFT 3
	#define MICBIAS_SETTING_MASK (0x7 << MICBIAS_SETTING_SFT)
	#define DEBOUNCE_RELEASE_SETTING_SFT 2
	#define DEBOUNCE_RELEASE_SETTING_MASK (0x1 << DEBOUNCE_RELEASE_SETTING_SFT)
	#define DEBOUNCE_PRESS_SETTING_SFT 0
	#define DEBOUNCE_PRESS_SETTING_MASK (0x3 << DEBOUNCE_PRESS_SETTING_SFT)

	/* TS3A227E_REG_ACCESSORY_STATUS 0x0b */
	#define TYPE_3_POLE 0x01
	#define TYPE_4_POLE_OMTP 0x02
	#define TYPE_4_POLE_STANDARD 0x04
	#define JACK_INSERTED 0x08
	#define EITHER_MIC_MASK (TYPE_4_POLE_OMTP \| TYPE_4_POLE_STANDARD)

	static const struct reg_default ts3a227e_reg_defaults[] = {
	{ TS3A227E_REG_DEVICE_ID, 0x10 },
	{ TS3A227E_REG_INTERRUPT, 0x00 },
	{ TS3A227E_REG_KP_INTERRUPT, 0x00 },
	{ TS3A227E_REG_INTERRUPT_DISABLE, 0x08 },
	{ TS3A227E_REG_SETTING_1, 0x23 },
	{ TS3A227E_REG_SETTING_2, 0x00 },
	{ TS3A227E_REG_SETTING_3, 0x0e },
	{ TS3A227E_REG_SWITCH_CONTROL_1, 0x00 },
	{ TS3A227E_REG_SWITCH_CONTROL_2, 0x00 },
	{ TS3A227E_REG_SWITCH_STATUS_1, 0x0c },
	{ TS3A227E_REG_SWITCH_STATUS_2, 0x00 },
	{ TS3A227E_REG_ACCESSORY_STATUS, 0x00 },
	{ TS3A227E_REG_ADC_OUTPUT, 0x00 },
	{ TS3A227E_REG_KP_THRESHOLD_1, 0x20 },
	{ TS3A227E_REG_KP_THRESHOLD_2, 0x40 },
	{ TS3A227E_REG_KP_THRESHOLD_3, 0x68 },
	};

	static bool ts3a227e_readable_reg(struct device *dev, unsigned int reg)
	{
	switch (reg) {
	case TS3A227E_REG_DEVICE_ID ... TS3A227E_REG_KP_THRESHOLD_3:
	return true;
	default:
	return false;
	}
	}

	static bool ts3a227e_writeable_reg(struct device *dev, unsigned int reg)
	{
	switch (reg) {
	case TS3A227E_REG_INTERRUPT_DISABLE ... TS3A227E_REG_SWITCH_CONTROL_2:
	case TS3A227E_REG_KP_THRESHOLD_1 ... TS3A227E_REG_KP_THRESHOLD_3:
	return true;
	default:
	return false;
	}
	}

	static bool ts3a227e_volatile_reg(struct device *dev, unsigned int reg)
	{
	switch (reg) {
	case TS3A227E_REG_INTERRUPT ... TS3A227E_REG_INTERRUPT_DISABLE:
	case TS3A227E_REG_SETTING_1 ... TS3A227E_REG_SETTING_2:
	case TS3A227E_REG_SWITCH_STATUS_1 ... TS3A227E_REG_ADC_OUTPUT:
	return true;
	default:
	return false;
	}
	}

	static void ts3a227e_jack_report(struct ts3a227e *ts3a227e)
	{
	unsigned int i;
	int report = 0;

	if (!ts3a227e->jack)
	return;

	if (ts3a227e->plugged)
	report = SND_JACK_HEADPHONE;
	if (ts3a227e->mic_present)
	report \|= SND_JACK_MICROPHONE;
	for (i = 0; i < TS3A227E_NUM_BUTTONS; i++) {
	if (ts3a227e->buttons_held & (1 << i))
	report \|= ts3a227e_buttons[i];
	}
	snd_soc_jack_report(ts3a227e->jack, report, TS3A227E_JACK_MASK);
	}

	static void ts3a227e_new_jack_state(struct ts3a227e *ts3a227e, unsigned acc_reg)
	{
	bool plugged, mic_present;

	plugged = !!(acc_reg & JACK_INSERTED);
	mic_present = plugged && !!(acc_reg & EITHER_MIC_MASK);

	ts3a227e->plugged = plugged;

	if (mic_present != ts3a227e->mic_present) {
	ts3a227e->mic_present = mic_present;
	ts3a227e->buttons_held = 0;
	if (mic_present) {
	/* Enable key press detection. */
	regmap_update_bits(ts3a227e->regmap,
	TS3A227E_REG_SETTING_2,
	KP_ENABLE, KP_ENABLE);
	}
	}
	}

	static irqreturn_t ts3a227e_interrupt(int irq, void *data)
	{
	struct ts3a227e ts3a227e = (struct ts3a227e )data;
	struct regmap *regmap = ts3a227e->regmap;
	unsigned int int_reg, kp_int_reg, acc_reg, i;
	struct device *dev = ts3a227e->dev;
	int ret;

	/* Check for plug/unplug. */
	ret = regmap_read(regmap, TS3A227E_REG_INTERRUPT, &int_reg);
	if (ret) {
	dev_err(dev, "failed to clear interrupt ret=%d\n", ret);
	return IRQ_NONE;
	}

	if (int_reg & (DETECTION_COMPLETE_EVENT \| INS_REM_EVENT)) {
	regmap_read(regmap, TS3A227E_REG_ACCESSORY_STATUS, &acc_reg);
	ts3a227e_new_jack_state(ts3a227e, acc_reg);
	}

	/* Report any key events. */
	ret = regmap_read(regmap, TS3A227E_REG_KP_INTERRUPT, &kp_int_reg);
	if (ret) {
	dev_err(dev, "failed to clear key interrupt ret=%d\n", ret);
	return IRQ_NONE;
	}

	for (i = 0; i < TS3A227E_NUM_BUTTONS; i++) {
	if (kp_int_reg & PRESS_MASK(i))
	ts3a227e->buttons_held \|= (1 << i);
	if (kp_int_reg & RELEASE_MASK(i))
	ts3a227e->buttons_held &= ~(1 << i);
	}

	ts3a227e_jack_report(ts3a227e);

	return IRQ_HANDLED;
	}

	/**
	* ts3a227e_enable_jack_detect - Specify a jack for event reporting
	*
	* @component: component to register the jack with
	* @jack: jack to use to report headset and button events on
	*
	* After this function has been called the headset insert/remove and button
	* events 0-3 will be routed to the given jack. Jack can be null to stop
	* reporting.
	*/
	int ts3a227e_enable_jack_detect(struct snd_soc_component *component,
	struct snd_soc_jack *jack)
	{
	struct ts3a227e *ts3a227e = snd_soc_component_get_drvdata(component);

	snd_jack_set_key(jack->jack, SND_JACK_BTN_0, KEY_PLAYPAUSE);
	snd_jack_set_key(jack->jack, SND_JACK_BTN_1, KEY_VOICECOMMAND);
	snd_jack_set_key(jack->jack, SND_JACK_BTN_2, KEY_VOLUMEUP);
	snd_jack_set_key(jack->jack, SND_JACK_BTN_3, KEY_VOLUMEDOWN);

	ts3a227e->jack = jack;
	ts3a227e_jack_report(ts3a227e);

	return 0;
	}
	EXPORT_SYMBOL_GPL(ts3a227e_enable_jack_detect);

	static int ts3a227e_set_jack(struct snd_soc_component *component,
	struct snd_soc_jack jack, void data)
	{
	if (jack == NULL)
	return -EINVAL;

	return ts3a227e_enable_jack_detect(component, jack);
	}

	static int ts3a227e_get_jack_type(struct snd_soc_component *component)
	{
	return SND_JACK_HEADSET;
	}

	static const struct snd_soc_component_driver ts3a227e_soc_driver = {
	.name = "ti,ts3a227e",
	.set_jack = ts3a227e_set_jack,
	.get_jack_type = ts3a227e_get_jack_type,
	};

	static const struct regmap_config ts3a227e_regmap_config = {
	.val_bits = 8,
	.reg_bits = 8,

	.max_register = TS3A227E_REG_KP_THRESHOLD_3,
	.readable_reg = ts3a227e_readable_reg,
	.writeable_reg = ts3a227e_writeable_reg,
	.volatile_reg = ts3a227e_volatile_reg,

	.cache_type = REGCACHE_RBTREE,
	.reg_defaults = ts3a227e_reg_defaults,
	.num_reg_defaults = ARRAY_SIZE(ts3a227e_reg_defaults),
	};

	static int ts3a227e_parse_device_property(struct ts3a227e *ts3a227e,
	struct device *dev)
	{
	u32 value;
	u32 value_ms;
	u32 setting3_value = 0;
	u32 setting3_mask = 0;
	int err;

	err = device_property_read_u32(dev, "ti,micbias", &value);
	if (!err) {
	setting3_mask = MICBIAS_SETTING_MASK;
	setting3_value = (value << MICBIAS_SETTING_SFT) &
	MICBIAS_SETTING_MASK;
	}

	err = device_property_read_u32(dev, "ti,debounce-release-ms",
	&value_ms);
	if (!err) {
	value = (value_ms > 10);
	setting3_mask \|= DEBOUNCE_RELEASE_SETTING_MASK;
	setting3_value \|= (value << DEBOUNCE_RELEASE_SETTING_SFT) &
	DEBOUNCE_RELEASE_SETTING_MASK;
	}

	err = device_property_read_u32(dev, "ti,debounce-press-ms", &value_ms);
	if (!err) {
	value = (value_ms + 20) / 40;
	if (value > 3)
	value = 3;
	setting3_mask \|= DEBOUNCE_PRESS_SETTING_MASK;
	setting3_value \|= (value << DEBOUNCE_PRESS_SETTING_SFT) &
	DEBOUNCE_PRESS_SETTING_MASK;
	}

	if (setting3_mask)
	regmap_update_bits(ts3a227e->regmap, TS3A227E_REG_SETTING_3,
	setting3_mask, setting3_value);

	err = device_property_read_u32(dev, "ti,debounce-insertion-ms",
	&value_ms);
	if (!err) {
	if (value_ms < 165)
	value = (value_ms + 15) / 30;
	else if (value_ms < 1500)
	value = 6;
	else
	value = 7;
	regmap_update_bits(ts3a227e->regmap, TS3A227E_REG_SETTING_1,
	DEBOUNCE_INSERTION_SETTING_MASK,
	(value << DEBOUNCE_INSERTION_SETTING_SFT) &
	DEBOUNCE_INSERTION_SETTING_MASK);
	}

	return 0;
	}

	static int ts3a227e_i2c_probe(struct i2c_client *i2c)
	{
	struct ts3a227e *ts3a227e;
	struct device *dev = &i2c->dev;
	int ret;
	unsigned int acc_reg;

	ts3a227e = devm_kzalloc(&i2c->dev, sizeof(*ts3a227e), GFP_KERNEL);
	if (ts3a227e == NULL)
	return -ENOMEM;

	i2c_set_clientdata(i2c, ts3a227e);
	ts3a227e->dev = dev;
	ts3a227e->irq = i2c->irq;

	ts3a227e->regmap = devm_regmap_init_i2c(i2c, &ts3a227e_regmap_config);
	if (IS_ERR(ts3a227e->regmap))
	return PTR_ERR(ts3a227e->regmap);

	ret = ts3a227e_parse_device_property(ts3a227e, dev);
	if (ret) {
	dev_err(dev, "Failed to parse device property: %d\n", ret);
	return ret;
	}

	ret = devm_request_threaded_irq(dev, i2c->irq, NULL, ts3a227e_interrupt,
	IRQF_TRIGGER_LOW \| IRQF_ONESHOT,
	"TS3A227E", ts3a227e);
	if (ret) {
	dev_err(dev, "Cannot request irq %d (%d)\n", i2c->irq, ret);
	return ret;
	}

	ret = devm_snd_soc_register_component(&i2c->dev, &ts3a227e_soc_driver,
	NULL, 0);
	if (ret)
	return ret;

	/* Enable interrupts except for ADC complete. */
	regmap_update_bits(ts3a227e->regmap, TS3A227E_REG_INTERRUPT_DISABLE,
	INTB_DISABLE \| ADC_COMPLETE_INT_DISABLE,
	ADC_COMPLETE_INT_DISABLE);

	/* Read jack status because chip might not trigger interrupt at boot. */
	regmap_read(ts3a227e->regmap, TS3A227E_REG_ACCESSORY_STATUS, &acc_reg);
	ts3a227e_new_jack_state(ts3a227e, acc_reg);
	ts3a227e_jack_report(ts3a227e);

	return 0;
	}

	#ifdef CONFIG_PM_SLEEP
	static int ts3a227e_suspend(struct device *dev)
	{
	struct ts3a227e *ts3a227e = dev_get_drvdata(dev);

	dev_dbg(ts3a227e->dev, "suspend disable irq\n");
	disable_irq(ts3a227e->irq);

	return 0;
	}

	static int ts3a227e_resume(struct device *dev)
	{
	struct ts3a227e *ts3a227e = dev_get_drvdata(dev);

	dev_dbg(ts3a227e->dev, "resume enable irq\n");
	enable_irq(ts3a227e->irq);

	return 0;
	}
	#endif

	static const struct dev_pm_ops ts3a227e_pm = {
	SET_SYSTEM_SLEEP_PM_OPS(ts3a227e_suspend, ts3a227e_resume)
	};

	static const struct i2c_device_id ts3a227e_i2c_ids[] = {
	{ "ts3a227e" },
	{ }
	};
	MODULE_DEVICE_TABLE(i2c, ts3a227e_i2c_ids);

	#ifdef CONFIG_OF
	static const struct of_device_id ts3a227e_of_match[] = {
	{ .compatible = "ti,ts3a227e", },
	{ }
	};
	MODULE_DEVICE_TABLE(of, ts3a227e_of_match);
	#endif

	#ifdef CONFIG_ACPI
	static struct acpi_device_id ts3a227e_acpi_match[] = {
	{ "104C227E", 0 },
	{},
	};
	MODULE_DEVICE_TABLE(acpi, ts3a227e_acpi_match);
	#endif

	static struct i2c_driver ts3a227e_driver = {
	.driver = {
	.name = "ts3a227e",
	.pm = &ts3a227e_pm,
	.of_match_table = of_match_ptr(ts3a227e_of_match),
	.acpi_match_table = ACPI_PTR(ts3a227e_acpi_match),
	},
	.probe = ts3a227e_i2c_probe,
	.id_table = ts3a227e_i2c_ids,
	};
	module_i2c_driver(ts3a227e_driver);

	MODULE_DESCRIPTION("ASoC ts3a227e driver");
	MODULE_AUTHOR("Dylan Reid <dgreid@chromium.org>");
	MODULE_LICENSE("GPL v2");