drivers/usb/typec/tcpci_rt1711h.c - linux-mtk - Git at Google

 // SPDX-License-Identifier: GPL-2.0+
 /*
  * Copyright (C) 2018, Richtek Technology Corporation
  *
  * Richtek RT1711H Type-C Chip Driver
  */

 #include <linux/kernel.h>
 #include <linux/module.h>
 #include <linux/i2c.h>
 #include <linux/interrupt.h>
 #include <linux/gpio/consumer.h>
 #include <linux/usb/tcpm.h>
 #include <linux/regmap.h>
 #include "tcpci.h"

 #define RT1711H_VID		0x29CF
 #define RT1711H_PID		0x1711

 #define RT1711H_RTCTRL8		0x9B

 /* Autoidle timeout = (tout * 2 + 1) * 6.4ms */
 #define RT1711H_RTCTRL8_SET(ck300, ship_off, auto_idle, tout) \
 			    (((ck300) << 7) | ((ship_off) << 5) | \
 			    ((auto_idle) << 3) | ((tout) & 0x07))

 #define RT1711H_RTCTRL11	0x9E

 /* I2C timeout = (tout + 1) * 12.5ms */
 #define RT1711H_RTCTRL11_SET(en, tout) \
 			     (((en) << 7) | ((tout) & 0x0F))

 #define RT1711H_RTCTRL13	0xA0
 #define RT1711H_RTCTRL14	0xA1
 #define RT1711H_RTCTRL15	0xA2
 #define RT1711H_RTCTRL16	0xA3

 struct rt1711h_chip {
 	struct tcpci_data data;
 	struct tcpci *tcpci;
 	struct device *dev;
 };

 static int rt1711h_read16(struct rt1711h_chip *chip, unsigned int reg, u16 *val)
 {
 	return regmap_raw_read(chip->data.regmap, reg, val, sizeof(u16));
 }

 static int rt1711h_write16(struct rt1711h_chip *chip, unsigned int reg, u16 val)
 {
 	return regmap_raw_write(chip->data.regmap, reg, &val, sizeof(u16));
 }

 static int rt1711h_read8(struct rt1711h_chip *chip, unsigned int reg, u8 *val)
 {
 	return regmap_raw_read(chip->data.regmap, reg, val, sizeof(u8));
 }

 static int rt1711h_write8(struct rt1711h_chip *chip, unsigned int reg, u8 val)
 {
 	return regmap_raw_write(chip->data.regmap, reg, &val, sizeof(u8));
 }

 static const struct regmap_config rt1711h_regmap_config = {
 	.reg_bits = 8,
 	.val_bits = 8,

 	.max_register = 0xFF, /* 0x80 .. 0xFF are vendor defined */
 };

 static struct rt1711h_chip *tdata_to_rt1711h(struct tcpci_data *tdata)
 {
 	return container_of(tdata, struct rt1711h_chip, data);
 }

 static int rt1711h_init(struct tcpci *tcpci, struct tcpci_data *tdata)
 {
 	int ret;
 	struct rt1711h_chip *chip = tdata_to_rt1711h(tdata);

 	/* CK 300K from 320K, shipping off, auto_idle enable, tout = 32ms */
 	ret = rt1711h_write8(chip, RT1711H_RTCTRL8,
 			     RT1711H_RTCTRL8_SET(0, 1, 1, 2));
 	if (ret < 0)
 		return ret;

 	/* I2C reset : (val + 1) * 12.5ms */
 	ret = rt1711h_write8(chip, RT1711H_RTCTRL11,
 			     RT1711H_RTCTRL11_SET(1, 0x0F));
 	if (ret < 0)
 		return ret;

 	/* tTCPCfilter : (26.7 * val) us */
 	ret = rt1711h_write8(chip, RT1711H_RTCTRL14, 0x0F);
 	if (ret < 0)
 		return ret;

 	/*  tDRP : (51.2 + 6.4 * val) ms */
 	ret = rt1711h_write8(chip, RT1711H_RTCTRL15, 0x04);
 	if (ret < 0)
 		return ret;

 	/* dcSRC.DRP : 33% */
 	return rt1711h_write16(chip, RT1711H_RTCTRL16, 330);
 }

 static int rt1711h_set_vconn(struct tcpci *tcpci, struct tcpci_data *tdata,
 			     bool enable)
 {
 	struct rt1711h_chip *chip = tdata_to_rt1711h(tdata);

 	return rt1711h_write8(chip, RT1711H_RTCTRL8,
 			      RT1711H_RTCTRL8_SET(0, 1, !enable, 2));
 }

 static int rt1711h_start_drp_toggling(struct tcpci *tcpci,
 				      struct tcpci_data *tdata,
 				      enum typec_cc_status cc)
 {
 	struct rt1711h_chip *chip = tdata_to_rt1711h(tdata);
 	int ret;
 	unsigned int reg = 0;

 	switch (cc) {
 	default:
 	case TYPEC_CC_RP_DEF:
 		reg |= (TCPC_ROLE_CTRL_RP_VAL_DEF <<
 			TCPC_ROLE_CTRL_RP_VAL_SHIFT);
 		break;
 	case TYPEC_CC_RP_1_5:
 		reg |= (TCPC_ROLE_CTRL_RP_VAL_1_5 <<
 			TCPC_ROLE_CTRL_RP_VAL_SHIFT);
 		break;
 	case TYPEC_CC_RP_3_0:
 		reg |= (TCPC_ROLE_CTRL_RP_VAL_3_0 <<
 			TCPC_ROLE_CTRL_RP_VAL_SHIFT);
 		break;
 	}

 	if (cc == TYPEC_CC_RD)
 		reg |= (TCPC_ROLE_CTRL_CC_RD << TCPC_ROLE_CTRL_CC1_SHIFT) |
 			   (TCPC_ROLE_CTRL_CC_RD << TCPC_ROLE_CTRL_CC2_SHIFT);
 	else
 		reg |= (TCPC_ROLE_CTRL_CC_RP << TCPC_ROLE_CTRL_CC1_SHIFT) |
 			   (TCPC_ROLE_CTRL_CC_RP << TCPC_ROLE_CTRL_CC2_SHIFT);

 	ret = rt1711h_write8(chip, TCPC_ROLE_CTRL, reg);
 	if (ret < 0)
 		return ret;
 	usleep_range(500, 1000);

 	return 0;
 }

 static irqreturn_t rt1711h_irq(int irq, void *dev_id)
 {
 	int ret;
 	u16 alert;
 	u8 status;
 	struct rt1711h_chip *chip = dev_id;

 	if (!chip->tcpci)
 		return IRQ_HANDLED;

 	ret = rt1711h_read16(chip, TCPC_ALERT, &alert);
 	if (ret < 0)
 		goto out;

 	if (alert & TCPC_ALERT_CC_STATUS) {
 		ret = rt1711h_read8(chip, TCPC_CC_STATUS, &status);
 		if (ret < 0)
 			goto out;
 		/* Clear cc change event triggered by starting toggling */
 		if (status & TCPC_CC_STATUS_TOGGLING)
 			rt1711h_write8(chip, TCPC_ALERT, TCPC_ALERT_CC_STATUS);
 	}

 out:
 	return tcpci_irq(chip->tcpci);
 }

 static int rt1711h_init_alert(struct rt1711h_chip *chip,
 			      struct i2c_client *client)
 {
 	int ret;

 	/* Disable chip interrupts before requesting irq */
 	ret = rt1711h_write16(chip, TCPC_ALERT_MASK, 0);
 	if (ret < 0)
 		return ret;

 	ret = devm_request_threaded_irq(chip->dev, client->irq, NULL,
 					rt1711h_irq,
 					IRQF_ONESHOT | IRQF_TRIGGER_LOW,
 					dev_name(chip->dev), chip);
 	if (ret < 0)
 		return ret;
 	enable_irq_wake(client->irq);
 	return 0;
 }

 static int rt1711h_sw_reset(struct rt1711h_chip *chip)
 {
 	int ret;

 	ret = rt1711h_write8(chip, RT1711H_RTCTRL13, 0x01);
 	if (ret < 0)
 		return ret;

 	usleep_range(1000, 2000);
 	return 0;
 }

 static int rt1711h_check_revision(struct i2c_client *i2c)
 {
 	int ret;

 	ret = i2c_smbus_read_word_data(i2c, TCPC_VENDOR_ID);
 	if (ret < 0)
 		return ret;
 	if (ret != RT1711H_VID) {
 		dev_err(&i2c->dev, "vid is not correct, 0x%04x\n", ret);
 		return -ENODEV;
 	}
 	ret = i2c_smbus_read_word_data(i2c, TCPC_PRODUCT_ID);
 	if (ret < 0)
 		return ret;
 	if (ret != RT1711H_PID) {
 		dev_err(&i2c->dev, "pid is not correct, 0x%04x\n", ret);
 		return -ENODEV;
 	}
 	return 0;
 }

 static int rt1711h_probe(struct i2c_client *client,
 			 const struct i2c_device_id *i2c_id)
 {
 	int ret;
 	struct rt1711h_chip *chip;

 	ret = rt1711h_check_revision(client);
 	if (ret < 0) {
 		dev_err(&client->dev, "check vid/pid fail\n");
 		return ret;
 	}

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

 	chip->data.regmap = devm_regmap_init_i2c(client,
 						 &rt1711h_regmap_config);
 	if (IS_ERR(chip->data.regmap))
 		return PTR_ERR(chip->data.regmap);

 	chip->dev = &client->dev;
 	i2c_set_clientdata(client, chip);

 	ret = rt1711h_sw_reset(chip);
 	if (ret < 0)
 		return ret;

 	ret = rt1711h_init_alert(chip, client);
 	if (ret < 0)
 		return ret;

 	chip->data.init = rt1711h_init;
 	chip->data.set_vconn = rt1711h_set_vconn;
 	chip->data.start_drp_toggling = rt1711h_start_drp_toggling;
 	chip->tcpci = tcpci_register_port(chip->dev, &chip->data);
 	if (IS_ERR_OR_NULL(chip->tcpci))
 		return PTR_ERR(chip->tcpci);

 	return 0;
 }

 static int rt1711h_remove(struct i2c_client *client)
 {
 	struct rt1711h_chip *chip = i2c_get_clientdata(client);

 	tcpci_unregister_port(chip->tcpci);
 	return 0;
 }

 static const struct i2c_device_id rt1711h_id[] = {
 	{ "rt1711h", 0 },
 	{ }
 };
 MODULE_DEVICE_TABLE(i2c, rt1711h_id);

 #ifdef CONFIG_OF
 static const struct of_device_id rt1711h_of_match[] = {
 	{ .compatible = "richtek,rt1711h", },
 	{},
 };
 MODULE_DEVICE_TABLE(of, rt1711h_of_match);
 #endif

 static struct i2c_driver rt1711h_i2c_driver = {
 	.driver = {
 		.name = "rt1711h",
 		.of_match_table = of_match_ptr(rt1711h_of_match),
 	},
 	.probe = rt1711h_probe,
 	.remove = rt1711h_remove,
 	.id_table = rt1711h_id,
 };
 module_i2c_driver(rt1711h_i2c_driver);

 MODULE_AUTHOR("ShuFan Lee <shufan_lee@richtek.com>");
 MODULE_DESCRIPTION("RT1711H USB Type-C Port Controller Interface Driver");
 MODULE_LICENSE("GPL");
	// SPDX-License-Identifier: GPL-2.0+
	/*
	* Copyright (C) 2018, Richtek Technology Corporation
	*
	* Richtek RT1711H Type-C Chip Driver
	*/

	#include <linux/kernel.h>
	#include <linux/module.h>
	#include <linux/i2c.h>
	#include <linux/interrupt.h>
	#include <linux/gpio/consumer.h>
	#include <linux/usb/tcpm.h>
	#include <linux/regmap.h>
	#include "tcpci.h"

	#define RT1711H_VID 0x29CF
	#define RT1711H_PID 0x1711

	#define RT1711H_RTCTRL8 0x9B

	/* Autoidle timeout = (tout * 2 + 1) * 6.4ms */
	#define RT1711H_RTCTRL8_SET(ck300, ship_off, auto_idle, tout) \
	(((ck300) << 7) \| ((ship_off) << 5) \| \
	((auto_idle) << 3) \| ((tout) & 0x07))

	#define RT1711H_RTCTRL11 0x9E

	/* I2C timeout = (tout + 1) * 12.5ms */
	#define RT1711H_RTCTRL11_SET(en, tout) \
	(((en) << 7) \| ((tout) & 0x0F))

	#define RT1711H_RTCTRL13 0xA0
	#define RT1711H_RTCTRL14 0xA1
	#define RT1711H_RTCTRL15 0xA2
	#define RT1711H_RTCTRL16 0xA3

	struct rt1711h_chip {
	struct tcpci_data data;
	struct tcpci *tcpci;
	struct device *dev;
	};

	static int rt1711h_read16(struct rt1711h_chip chip, unsigned int reg, u16 val)
	{
	return regmap_raw_read(chip->data.regmap, reg, val, sizeof(u16));
	}

	static int rt1711h_write16(struct rt1711h_chip *chip, unsigned int reg, u16 val)
	{
	return regmap_raw_write(chip->data.regmap, reg, &val, sizeof(u16));
	}

	static int rt1711h_read8(struct rt1711h_chip chip, unsigned int reg, u8 val)
	{
	return regmap_raw_read(chip->data.regmap, reg, val, sizeof(u8));
	}

	static int rt1711h_write8(struct rt1711h_chip *chip, unsigned int reg, u8 val)
	{
	return regmap_raw_write(chip->data.regmap, reg, &val, sizeof(u8));
	}

	static const struct regmap_config rt1711h_regmap_config = {
	.reg_bits = 8,
	.val_bits = 8,

	.max_register = 0xFF, /* 0x80 .. 0xFF are vendor defined */
	};

	static struct rt1711h_chip tdata_to_rt1711h(struct tcpci_data tdata)
	{
	return container_of(tdata, struct rt1711h_chip, data);
	}

	static int rt1711h_init(struct tcpci tcpci, struct tcpci_data tdata)
	{
	int ret;
	struct rt1711h_chip *chip = tdata_to_rt1711h(tdata);

	/* CK 300K from 320K, shipping off, auto_idle enable, tout = 32ms */
	ret = rt1711h_write8(chip, RT1711H_RTCTRL8,
	RT1711H_RTCTRL8_SET(0, 1, 1, 2));
	if (ret < 0)
	return ret;

	/* I2C reset : (val + 1) * 12.5ms */
	ret = rt1711h_write8(chip, RT1711H_RTCTRL11,
	RT1711H_RTCTRL11_SET(1, 0x0F));
	if (ret < 0)
	return ret;

	/* tTCPCfilter : (26.7 * val) us */
	ret = rt1711h_write8(chip, RT1711H_RTCTRL14, 0x0F);
	if (ret < 0)
	return ret;

	/* tDRP : (51.2 + 6.4 * val) ms */
	ret = rt1711h_write8(chip, RT1711H_RTCTRL15, 0x04);
	if (ret < 0)
	return ret;

	/* dcSRC.DRP : 33% */
	return rt1711h_write16(chip, RT1711H_RTCTRL16, 330);
	}

	static int rt1711h_set_vconn(struct tcpci tcpci, struct tcpci_data tdata,
	bool enable)
	{
	struct rt1711h_chip *chip = tdata_to_rt1711h(tdata);

	return rt1711h_write8(chip, RT1711H_RTCTRL8,
	RT1711H_RTCTRL8_SET(0, 1, !enable, 2));
	}

	static int rt1711h_start_drp_toggling(struct tcpci *tcpci,
	struct tcpci_data *tdata,
	enum typec_cc_status cc)
	{
	struct rt1711h_chip *chip = tdata_to_rt1711h(tdata);
	int ret;
	unsigned int reg = 0;

	switch (cc) {
	default:
	case TYPEC_CC_RP_DEF:
	reg \|= (TCPC_ROLE_CTRL_RP_VAL_DEF <<
	TCPC_ROLE_CTRL_RP_VAL_SHIFT);
	break;
	case TYPEC_CC_RP_1_5:
	reg \|= (TCPC_ROLE_CTRL_RP_VAL_1_5 <<
	TCPC_ROLE_CTRL_RP_VAL_SHIFT);
	break;
	case TYPEC_CC_RP_3_0:
	reg \|= (TCPC_ROLE_CTRL_RP_VAL_3_0 <<
	TCPC_ROLE_CTRL_RP_VAL_SHIFT);
	break;
	}

	if (cc == TYPEC_CC_RD)
	reg \|= (TCPC_ROLE_CTRL_CC_RD << TCPC_ROLE_CTRL_CC1_SHIFT) \|
	(TCPC_ROLE_CTRL_CC_RD << TCPC_ROLE_CTRL_CC2_SHIFT);
	else
	reg \|= (TCPC_ROLE_CTRL_CC_RP << TCPC_ROLE_CTRL_CC1_SHIFT) \|
	(TCPC_ROLE_CTRL_CC_RP << TCPC_ROLE_CTRL_CC2_SHIFT);

	ret = rt1711h_write8(chip, TCPC_ROLE_CTRL, reg);
	if (ret < 0)
	return ret;
	usleep_range(500, 1000);

	return 0;
	}

	static irqreturn_t rt1711h_irq(int irq, void *dev_id)
	{
	int ret;
	u16 alert;
	u8 status;
	struct rt1711h_chip *chip = dev_id;

	if (!chip->tcpci)
	return IRQ_HANDLED;

	ret = rt1711h_read16(chip, TCPC_ALERT, &alert);
	if (ret < 0)
	goto out;

	if (alert & TCPC_ALERT_CC_STATUS) {
	ret = rt1711h_read8(chip, TCPC_CC_STATUS, &status);
	if (ret < 0)
	goto out;
	/* Clear cc change event triggered by starting toggling */
	if (status & TCPC_CC_STATUS_TOGGLING)
	rt1711h_write8(chip, TCPC_ALERT, TCPC_ALERT_CC_STATUS);
	}

	out:
	return tcpci_irq(chip->tcpci);
	}

	static int rt1711h_init_alert(struct rt1711h_chip *chip,
	struct i2c_client *client)
	{
	int ret;

	/* Disable chip interrupts before requesting irq */
	ret = rt1711h_write16(chip, TCPC_ALERT_MASK, 0);
	if (ret < 0)
	return ret;

	ret = devm_request_threaded_irq(chip->dev, client->irq, NULL,
	rt1711h_irq,
	IRQF_ONESHOT \| IRQF_TRIGGER_LOW,
	dev_name(chip->dev), chip);
	if (ret < 0)
	return ret;
	enable_irq_wake(client->irq);
	return 0;
	}

	static int rt1711h_sw_reset(struct rt1711h_chip *chip)
	{
	int ret;

	ret = rt1711h_write8(chip, RT1711H_RTCTRL13, 0x01);
	if (ret < 0)
	return ret;

	usleep_range(1000, 2000);
	return 0;
	}

	static int rt1711h_check_revision(struct i2c_client *i2c)
	{
	int ret;

	ret = i2c_smbus_read_word_data(i2c, TCPC_VENDOR_ID);
	if (ret < 0)
	return ret;
	if (ret != RT1711H_VID) {
	dev_err(&i2c->dev, "vid is not correct, 0x%04x\n", ret);
	return -ENODEV;
	}
	ret = i2c_smbus_read_word_data(i2c, TCPC_PRODUCT_ID);
	if (ret < 0)
	return ret;
	if (ret != RT1711H_PID) {
	dev_err(&i2c->dev, "pid is not correct, 0x%04x\n", ret);
	return -ENODEV;
	}
	return 0;
	}

	static int rt1711h_probe(struct i2c_client *client,
	const struct i2c_device_id *i2c_id)
	{
	int ret;
	struct rt1711h_chip *chip;

	ret = rt1711h_check_revision(client);
	if (ret < 0) {
	dev_err(&client->dev, "check vid/pid fail\n");
	return ret;
	}

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

	chip->data.regmap = devm_regmap_init_i2c(client,
	&rt1711h_regmap_config);
	if (IS_ERR(chip->data.regmap))
	return PTR_ERR(chip->data.regmap);

	chip->dev = &client->dev;
	i2c_set_clientdata(client, chip);

	ret = rt1711h_sw_reset(chip);
	if (ret < 0)
	return ret;

	ret = rt1711h_init_alert(chip, client);
	if (ret < 0)
	return ret;

	chip->data.init = rt1711h_init;
	chip->data.set_vconn = rt1711h_set_vconn;
	chip->data.start_drp_toggling = rt1711h_start_drp_toggling;
	chip->tcpci = tcpci_register_port(chip->dev, &chip->data);
	if (IS_ERR_OR_NULL(chip->tcpci))
	return PTR_ERR(chip->tcpci);

	return 0;
	}

	static int rt1711h_remove(struct i2c_client *client)
	{
	struct rt1711h_chip *chip = i2c_get_clientdata(client);

	tcpci_unregister_port(chip->tcpci);
	return 0;
	}

	static const struct i2c_device_id rt1711h_id[] = {
	{ "rt1711h", 0 },
	{ }
	};
	MODULE_DEVICE_TABLE(i2c, rt1711h_id);

	#ifdef CONFIG_OF
	static const struct of_device_id rt1711h_of_match[] = {
	{ .compatible = "richtek,rt1711h", },
	{},
	};
	MODULE_DEVICE_TABLE(of, rt1711h_of_match);
	#endif

	static struct i2c_driver rt1711h_i2c_driver = {
	.driver = {
	.name = "rt1711h",
	.of_match_table = of_match_ptr(rt1711h_of_match),
	},
	.probe = rt1711h_probe,
	.remove = rt1711h_remove,
	.id_table = rt1711h_id,
	};
	module_i2c_driver(rt1711h_i2c_driver);

	MODULE_AUTHOR("ShuFan Lee <shufan_lee@richtek.com>");
	MODULE_DESCRIPTION("RT1711H USB Type-C Port Controller Interface Driver");
	MODULE_LICENSE("GPL");