lists.openwall.net   lists  /  announce  owl-users  owl-dev  john-users  john-dev  passwdqc-users  yescrypt  popa3d-users  /  oss-security  kernel-hardening  musl  sabotage  tlsify  passwords  /  crypt-dev  xvendor  /  Bugtraq  Full-Disclosure  linux-kernel  linux-netdev  linux-ext4  linux-hardening  PHC 
Open Source and information security mailing list archives
 
Hash Suite: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Date:   Sun, 10 Sep 2017 13:37:05 -0700
From:   Guenter Roeck <linux@...ck-us.net>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     Heikki Krogerus <heikki.krogerus@...ux.intel.com>,
        Yueyao Zhu <yueyao@...gle.com>,
        Badhri Jagan Sridharan <badhri@...gle.com>,
        Hans de Goede <hdegoede@...hat.com>,
        linux-kernel@...r.kernel.org, devel@...verdev.osuosl.org,
        linux-usb@...r.kernel.org, Guenter Roeck <linux@...ck-us.net>
Subject: [PATCH 5/5] usb: typec: fusb302: Move out of staging

The driver is in good enough shape to be moved out of staging.
Do it.

Signed-off-by: Guenter Roeck <linux@...ck-us.net>
---
 drivers/staging/typec/Kconfig               |    2 -
 drivers/staging/typec/Makefile              |    1 -
 drivers/staging/typec/fusb302/Kconfig       |    7 -
 drivers/staging/typec/fusb302/Makefile      |    1 -
 drivers/staging/typec/fusb302/TODO          |   10 -
 drivers/staging/typec/fusb302/fusb302.c     | 1947 ---------------------------
 drivers/staging/typec/fusb302/fusb302_reg.h |  186 ---
 drivers/usb/typec/Kconfig                   |    6 +
 drivers/usb/typec/Makefile                  |    1 +
 drivers/usb/typec/fusb302/Kconfig           |    7 +
 drivers/usb/typec/fusb302/Makefile          |    1 +
 drivers/usb/typec/fusb302/fusb302.c         | 1947 +++++++++++++++++++++++++++
 drivers/usb/typec/fusb302/fusb302_reg.h     |  186 +++
 13 files changed, 2148 insertions(+), 2154 deletions(-)
 delete mode 100644 drivers/staging/typec/fusb302/Kconfig
 delete mode 100644 drivers/staging/typec/fusb302/Makefile
 delete mode 100644 drivers/staging/typec/fusb302/TODO
 delete mode 100644 drivers/staging/typec/fusb302/fusb302.c
 delete mode 100644 drivers/staging/typec/fusb302/fusb302_reg.h
 create mode 100644 drivers/usb/typec/fusb302/Kconfig
 create mode 100644 drivers/usb/typec/fusb302/Makefile
 create mode 100644 drivers/usb/typec/fusb302/fusb302.c
 create mode 100644 drivers/usb/typec/fusb302/fusb302_reg.h

diff --git a/drivers/staging/typec/Kconfig b/drivers/staging/typec/Kconfig
index 31fad23c2553..5359f556d203 100644
--- a/drivers/staging/typec/Kconfig
+++ b/drivers/staging/typec/Kconfig
@@ -9,8 +9,6 @@ config TYPEC_TCPCI
 	help
 	  Type-C Port Controller driver for TCPCI-compliant controller.
 
-source "drivers/staging/typec/fusb302/Kconfig"
-
 endif
 
 endmenu
diff --git a/drivers/staging/typec/Makefile b/drivers/staging/typec/Makefile
index e1df3f0fde10..53d649abcb53 100644
--- a/drivers/staging/typec/Makefile
+++ b/drivers/staging/typec/Makefile
@@ -1,2 +1 @@
 obj-$(CONFIG_TYPEC_TCPCI)	+= tcpci.o
-obj-y				+= fusb302/
diff --git a/drivers/staging/typec/fusb302/Kconfig b/drivers/staging/typec/fusb302/Kconfig
deleted file mode 100644
index 48a4f2fcee03..000000000000
--- a/drivers/staging/typec/fusb302/Kconfig
+++ /dev/null
@@ -1,7 +0,0 @@
-config TYPEC_FUSB302
-	tristate "Fairchild FUSB302 Type-C chip driver"
-	depends on I2C && POWER_SUPPLY
-	help
-	  The Fairchild FUSB302 Type-C chip driver that works with
-	  Type-C Port Controller Manager to provide USB PD and USB
-	  Type-C functionalities.
diff --git a/drivers/staging/typec/fusb302/Makefile b/drivers/staging/typec/fusb302/Makefile
deleted file mode 100644
index 207efa5fbab8..000000000000
--- a/drivers/staging/typec/fusb302/Makefile
+++ /dev/null
@@ -1 +0,0 @@
-obj-$(CONFIG_TYPEC_FUSB302)	+= fusb302.o
diff --git a/drivers/staging/typec/fusb302/TODO b/drivers/staging/typec/fusb302/TODO
deleted file mode 100644
index 19b466eb585d..000000000000
--- a/drivers/staging/typec/fusb302/TODO
+++ /dev/null
@@ -1,10 +0,0 @@
-fusb302:
-- Find a better logging scheme, at least not having the same debugging/logging
-  code replicated here and in tcpm
-- Find a non-hacky way to coordinate between PM and I2C access
-- Documentation? The FUSB302 datasheet provides information on the chip to help
-  understand the code. But it may still be helpful to have a documentation.
-- We may want to replace the  "fcs,max-snk-microvolt", "fcs,max-snk-microamp",
-  "fcs,max-snk-microwatt" and "fcs,operating-snk-microwatt" device(tree)
-  properties with properties which are part of a generic type-c controller
-  devicetree binding.
diff --git a/drivers/staging/typec/fusb302/fusb302.c b/drivers/staging/typec/fusb302/fusb302.c
deleted file mode 100644
index e790b67d4953..000000000000
--- a/drivers/staging/typec/fusb302/fusb302.c
+++ /dev/null
@@ -1,1947 +0,0 @@
-/*
- * Copyright 2016-2017 Google, Inc
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * Fairchild FUSB302 Type-C Chip Driver
- */
-
-#include <linux/debugfs.h>
-#include <linux/delay.h>
-#include <linux/errno.h>
-#include <linux/extcon.h>
-#include <linux/gpio.h>
-#include <linux/i2c.h>
-#include <linux/interrupt.h>
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/mutex.h>
-#include <linux/of_device.h>
-#include <linux/of_device.h>
-#include <linux/of_gpio.h>
-#include <linux/pinctrl/consumer.h>
-#include <linux/power_supply.h>
-#include <linux/proc_fs.h>
-#include <linux/regulator/consumer.h>
-#include <linux/sched/clock.h>
-#include <linux/seq_file.h>
-#include <linux/slab.h>
-#include <linux/string.h>
-#include <linux/types.h>
-#include <linux/usb/typec.h>
-#include <linux/usb/tcpm.h>
-#include <linux/usb/pd.h>
-#include <linux/workqueue.h>
-
-#include "fusb302_reg.h"
-
-/*
- * When the device is SNK, BC_LVL interrupt is used to monitor cc pins
- * for the current capability offered by the SRC. As FUSB302 chip fires
- * the BC_LVL interrupt on PD signalings, cc lvl should be handled after
- * a delay to avoid measuring on PD activities. The delay is slightly
- * longer than PD_T_PD_DEBPUNCE (10-20ms).
- */
-#define T_BC_LVL_DEBOUNCE_DELAY_MS 30
-
-enum toggling_mode {
-	TOGGLINE_MODE_OFF,
-	TOGGLING_MODE_DRP,
-	TOGGLING_MODE_SNK,
-	TOGGLING_MODE_SRC,
-};
-
-static const char * const toggling_mode_name[] = {
-	[TOGGLINE_MODE_OFF]	= "toggling_OFF",
-	[TOGGLING_MODE_DRP]	= "toggling_DRP",
-	[TOGGLING_MODE_SNK]	= "toggling_SNK",
-	[TOGGLING_MODE_SRC]	= "toggling_SRC",
-};
-
-enum src_current_status {
-	SRC_CURRENT_DEFAULT,
-	SRC_CURRENT_MEDIUM,
-	SRC_CURRENT_HIGH,
-};
-
-static const u8 ra_mda_value[] = {
-	[SRC_CURRENT_DEFAULT] = 4,	/* 210mV */
-	[SRC_CURRENT_MEDIUM] = 9,	/* 420mV */
-	[SRC_CURRENT_HIGH] = 18,	/* 798mV */
-};
-
-static const u8 rd_mda_value[] = {
-	[SRC_CURRENT_DEFAULT] = 38,	/* 1638mV */
-	[SRC_CURRENT_MEDIUM] = 38,	/* 1638mV */
-	[SRC_CURRENT_HIGH] = 61,	/* 2604mV */
-};
-
-#define LOG_BUFFER_ENTRIES	1024
-#define LOG_BUFFER_ENTRY_SIZE	128
-
-struct fusb302_chip {
-	struct device *dev;
-	struct i2c_client *i2c_client;
-	struct tcpm_port *tcpm_port;
-	struct tcpc_dev tcpc_dev;
-	struct tcpc_config tcpc_config;
-
-	struct regulator *vbus;
-
-	int gpio_int_n;
-	int gpio_int_n_irq;
-	struct extcon_dev *extcon;
-
-	struct workqueue_struct *wq;
-	struct delayed_work bc_lvl_handler;
-
-	atomic_t pm_suspend;
-	atomic_t i2c_busy;
-
-	/* lock for sharing chip states */
-	struct mutex lock;
-
-	/* psy + psy status */
-	struct power_supply *psy;
-	u32 current_limit;
-	u32 supply_voltage;
-
-	/* chip status */
-	enum toggling_mode toggling_mode;
-	enum src_current_status src_current_status;
-	bool intr_togdone;
-	bool intr_bc_lvl;
-	bool intr_comp_chng;
-
-	/* port status */
-	bool pull_up;
-	bool vconn_on;
-	bool vbus_on;
-	bool charge_on;
-	bool vbus_present;
-	enum typec_cc_polarity cc_polarity;
-	enum typec_cc_status cc1;
-	enum typec_cc_status cc2;
-
-#ifdef CONFIG_DEBUG_FS
-	struct dentry *dentry;
-	/* lock for log buffer access */
-	struct mutex logbuffer_lock;
-	int logbuffer_head;
-	int logbuffer_tail;
-	u8 *logbuffer[LOG_BUFFER_ENTRIES];
-#endif
-};
-
-/*
- * Logging
- */
-
-#ifdef CONFIG_DEBUG_FS
-
-static bool fusb302_log_full(struct fusb302_chip *chip)
-{
-	return chip->logbuffer_tail ==
-		(chip->logbuffer_head + 1) % LOG_BUFFER_ENTRIES;
-}
-
-static void _fusb302_log(struct fusb302_chip *chip, const char *fmt,
-			 va_list args)
-{
-	char tmpbuffer[LOG_BUFFER_ENTRY_SIZE];
-	u64 ts_nsec = local_clock();
-	unsigned long rem_nsec;
-
-	if (!chip->logbuffer[chip->logbuffer_head]) {
-		chip->logbuffer[chip->logbuffer_head] =
-				kzalloc(LOG_BUFFER_ENTRY_SIZE, GFP_KERNEL);
-		if (!chip->logbuffer[chip->logbuffer_head])
-			return;
-	}
-
-	vsnprintf(tmpbuffer, sizeof(tmpbuffer), fmt, args);
-
-	mutex_lock(&chip->logbuffer_lock);
-
-	if (fusb302_log_full(chip)) {
-		chip->logbuffer_head = max(chip->logbuffer_head - 1, 0);
-		strlcpy(tmpbuffer, "overflow", sizeof(tmpbuffer));
-	}
-
-	if (chip->logbuffer_head < 0 ||
-	    chip->logbuffer_head >= LOG_BUFFER_ENTRIES) {
-		dev_warn(chip->dev,
-			 "Bad log buffer index %d\n", chip->logbuffer_head);
-		goto abort;
-	}
-
-	if (!chip->logbuffer[chip->logbuffer_head]) {
-		dev_warn(chip->dev,
-			 "Log buffer index %d is NULL\n", chip->logbuffer_head);
-		goto abort;
-	}
-
-	rem_nsec = do_div(ts_nsec, 1000000000);
-	scnprintf(chip->logbuffer[chip->logbuffer_head],
-		  LOG_BUFFER_ENTRY_SIZE, "[%5lu.%06lu] %s",
-		  (unsigned long)ts_nsec, rem_nsec / 1000,
-		  tmpbuffer);
-	chip->logbuffer_head = (chip->logbuffer_head + 1) % LOG_BUFFER_ENTRIES;
-
-abort:
-	mutex_unlock(&chip->logbuffer_lock);
-}
-
-static void fusb302_log(struct fusb302_chip *chip, const char *fmt, ...)
-{
-	va_list args;
-
-	va_start(args, fmt);
-	_fusb302_log(chip, fmt, args);
-	va_end(args);
-}
-
-static int fusb302_seq_show(struct seq_file *s, void *v)
-{
-	struct fusb302_chip *chip = (struct fusb302_chip *)s->private;
-	int tail;
-
-	mutex_lock(&chip->logbuffer_lock);
-	tail = chip->logbuffer_tail;
-	while (tail != chip->logbuffer_head) {
-		seq_printf(s, "%s\n", chip->logbuffer[tail]);
-		tail = (tail + 1) % LOG_BUFFER_ENTRIES;
-	}
-	if (!seq_has_overflowed(s))
-		chip->logbuffer_tail = tail;
-	mutex_unlock(&chip->logbuffer_lock);
-
-	return 0;
-}
-
-static int fusb302_debug_open(struct inode *inode, struct file *file)
-{
-	return single_open(file, fusb302_seq_show, inode->i_private);
-}
-
-static const struct file_operations fusb302_debug_operations = {
-	.open		= fusb302_debug_open,
-	.llseek		= seq_lseek,
-	.read		= seq_read,
-	.release	= single_release,
-};
-
-static struct dentry *rootdir;
-
-static int fusb302_debugfs_init(struct fusb302_chip *chip)
-{
-	mutex_init(&chip->logbuffer_lock);
-	if (!rootdir) {
-		rootdir = debugfs_create_dir("fusb302", NULL);
-		if (!rootdir)
-			return -ENOMEM;
-	}
-
-	chip->dentry = debugfs_create_file(dev_name(chip->dev),
-					   S_IFREG | 0444, rootdir,
-					   chip, &fusb302_debug_operations);
-
-	return 0;
-}
-
-static void fusb302_debugfs_exit(struct fusb302_chip *chip)
-{
-	debugfs_remove(chip->dentry);
-}
-
-#else
-
-static void fusb302_log(const struct fusb302_chip *chip,
-			const char *fmt, ...) { }
-static int fusb302_debugfs_init(const struct fusb302_chip *chip) { return 0; }
-static void fusb302_debugfs_exit(const struct fusb302_chip *chip) { }
-
-#endif
-
-#define FUSB302_RESUME_RETRY 10
-#define FUSB302_RESUME_RETRY_SLEEP 50
-
-static bool fusb302_is_suspended(struct fusb302_chip *chip)
-{
-	int retry_cnt;
-
-	for (retry_cnt = 0; retry_cnt < FUSB302_RESUME_RETRY; retry_cnt++) {
-		if (atomic_read(&chip->pm_suspend)) {
-			dev_err(chip->dev, "i2c: pm suspend, retry %d/%d\n",
-				retry_cnt + 1, FUSB302_RESUME_RETRY);
-			msleep(FUSB302_RESUME_RETRY_SLEEP);
-		} else {
-			return false;
-		}
-	}
-
-	return true;
-}
-
-static int fusb302_i2c_write(struct fusb302_chip *chip,
-			     u8 address, u8 data)
-{
-	int ret = 0;
-
-	atomic_set(&chip->i2c_busy, 1);
-
-	if (fusb302_is_suspended(chip)) {
-		atomic_set(&chip->i2c_busy, 0);
-		return -ETIMEDOUT;
-	}
-
-	ret = i2c_smbus_write_byte_data(chip->i2c_client, address, data);
-	if (ret < 0)
-		fusb302_log(chip, "cannot write 0x%02x to 0x%02x, ret=%d",
-			    data, address, ret);
-	atomic_set(&chip->i2c_busy, 0);
-
-	return ret;
-}
-
-static int fusb302_i2c_block_write(struct fusb302_chip *chip, u8 address,
-				   u8 length, const u8 *data)
-{
-	int ret = 0;
-
-	if (length <= 0)
-		return ret;
-	atomic_set(&chip->i2c_busy, 1);
-
-	if (fusb302_is_suspended(chip)) {
-		atomic_set(&chip->i2c_busy, 0);
-		return -ETIMEDOUT;
-	}
-
-	ret = i2c_smbus_write_i2c_block_data(chip->i2c_client, address,
-					     length, data);
-	if (ret < 0)
-		fusb302_log(chip, "cannot block write 0x%02x, len=%d, ret=%d",
-			    address, length, ret);
-	atomic_set(&chip->i2c_busy, 0);
-
-	return ret;
-}
-
-static int fusb302_i2c_read(struct fusb302_chip *chip,
-			    u8 address, u8 *data)
-{
-	int ret = 0;
-
-	atomic_set(&chip->i2c_busy, 1);
-
-	if (fusb302_is_suspended(chip)) {
-		atomic_set(&chip->i2c_busy, 0);
-		return -ETIMEDOUT;
-	}
-
-	ret = i2c_smbus_read_byte_data(chip->i2c_client, address);
-	*data = (u8)ret;
-	if (ret < 0)
-		fusb302_log(chip, "cannot read %02x, ret=%d", address, ret);
-	atomic_set(&chip->i2c_busy, 0);
-
-	return ret;
-}
-
-static int fusb302_i2c_block_read(struct fusb302_chip *chip, u8 address,
-				  u8 length, u8 *data)
-{
-	int ret = 0;
-
-	if (length <= 0)
-		return ret;
-	atomic_set(&chip->i2c_busy, 1);
-
-	if (fusb302_is_suspended(chip)) {
-		atomic_set(&chip->i2c_busy, 0);
-		return -ETIMEDOUT;
-	}
-
-	ret = i2c_smbus_read_i2c_block_data(chip->i2c_client, address,
-					    length, data);
-	if (ret < 0) {
-		fusb302_log(chip, "cannot block read 0x%02x, len=%d, ret=%d",
-			    address, length, ret);
-		goto done;
-	}
-	if (ret != length) {
-		fusb302_log(chip, "only read %d/%d bytes from 0x%02x",
-			    ret, length, address);
-		ret = -EIO;
-	}
-
-done:
-	atomic_set(&chip->i2c_busy, 0);
-
-	return ret;
-}
-
-static int fusb302_i2c_mask_write(struct fusb302_chip *chip, u8 address,
-				  u8 mask, u8 value)
-{
-	int ret = 0;
-	u8 data;
-
-	ret = fusb302_i2c_read(chip, address, &data);
-	if (ret < 0)
-		return ret;
-	data &= ~mask;
-	data |= value;
-	ret = fusb302_i2c_write(chip, address, data);
-	if (ret < 0)
-		return ret;
-
-	return ret;
-}
-
-static int fusb302_i2c_set_bits(struct fusb302_chip *chip, u8 address,
-				u8 set_bits)
-{
-	return fusb302_i2c_mask_write(chip, address, 0x00, set_bits);
-}
-
-static int fusb302_i2c_clear_bits(struct fusb302_chip *chip, u8 address,
-				  u8 clear_bits)
-{
-	return fusb302_i2c_mask_write(chip, address, clear_bits, 0x00);
-}
-
-static int fusb302_sw_reset(struct fusb302_chip *chip)
-{
-	int ret = 0;
-
-	ret = fusb302_i2c_write(chip, FUSB_REG_RESET,
-				FUSB_REG_RESET_SW_RESET);
-	if (ret < 0)
-		fusb302_log(chip, "cannot sw reset the chip, ret=%d", ret);
-	else
-		fusb302_log(chip, "sw reset");
-
-	return ret;
-}
-
-static int fusb302_enable_tx_auto_retries(struct fusb302_chip *chip)
-{
-	int ret = 0;
-
-	ret = fusb302_i2c_set_bits(chip, FUSB_REG_CONTROL3,
-				   FUSB_REG_CONTROL3_N_RETRIES_3 |
-				   FUSB_REG_CONTROL3_AUTO_RETRY);
-
-	return ret;
-}
-
-/*
- * initialize interrupt on the chip
- * - unmasked interrupt: VBUS_OK
- */
-static int fusb302_init_interrupt(struct fusb302_chip *chip)
-{
-	int ret = 0;
-
-	ret = fusb302_i2c_write(chip, FUSB_REG_MASK,
-				0xFF & ~FUSB_REG_MASK_VBUSOK);
-	if (ret < 0)
-		return ret;
-	ret = fusb302_i2c_write(chip, FUSB_REG_MASKA, 0xFF);
-	if (ret < 0)
-		return ret;
-	ret = fusb302_i2c_write(chip, FUSB_REG_MASKB, 0xFF);
-	if (ret < 0)
-		return ret;
-	ret = fusb302_i2c_clear_bits(chip, FUSB_REG_CONTROL0,
-				     FUSB_REG_CONTROL0_INT_MASK);
-	if (ret < 0)
-		return ret;
-
-	return ret;
-}
-
-static int fusb302_set_power_mode(struct fusb302_chip *chip, u8 power_mode)
-{
-	int ret = 0;
-
-	ret = fusb302_i2c_write(chip, FUSB_REG_POWER, power_mode);
-
-	return ret;
-}
-
-static int tcpm_init(struct tcpc_dev *dev)
-{
-	struct fusb302_chip *chip = container_of(dev, struct fusb302_chip,
-						 tcpc_dev);
-	int ret = 0;
-	u8 data;
-
-	ret = fusb302_sw_reset(chip);
-	if (ret < 0)
-		return ret;
-	ret = fusb302_enable_tx_auto_retries(chip);
-	if (ret < 0)
-		return ret;
-	ret = fusb302_init_interrupt(chip);
-	if (ret < 0)
-		return ret;
-	ret = fusb302_set_power_mode(chip, FUSB_REG_POWER_PWR_ALL);
-	if (ret < 0)
-		return ret;
-	ret = fusb302_i2c_read(chip, FUSB_REG_STATUS0, &data);
-	if (ret < 0)
-		return ret;
-	chip->vbus_present = !!(data & FUSB_REG_STATUS0_VBUSOK);
-	ret = fusb302_i2c_read(chip, FUSB_REG_DEVICE_ID, &data);
-	if (ret < 0)
-		return ret;
-	fusb302_log(chip, "fusb302 device ID: 0x%02x", data);
-
-	return ret;
-}
-
-static int tcpm_get_vbus(struct tcpc_dev *dev)
-{
-	struct fusb302_chip *chip = container_of(dev, struct fusb302_chip,
-						 tcpc_dev);
-	int ret = 0;
-
-	mutex_lock(&chip->lock);
-	ret = chip->vbus_present ? 1 : 0;
-	mutex_unlock(&chip->lock);
-
-	return ret;
-}
-
-static int tcpm_get_current_limit(struct tcpc_dev *dev)
-{
-	struct fusb302_chip *chip = container_of(dev, struct fusb302_chip,
-						 tcpc_dev);
-	int current_limit = 0;
-	unsigned long timeout;
-
-	if (!chip->extcon)
-		return 0;
-
-	/*
-	 * USB2 Charger detection may still be in progress when we get here,
-	 * this can take upto 600ms, wait 800ms max.
-	 */
-	timeout = jiffies + msecs_to_jiffies(800);
-	do {
-		if (extcon_get_state(chip->extcon, EXTCON_CHG_USB_SDP) == 1)
-			current_limit = 500;
-
-		if (extcon_get_state(chip->extcon, EXTCON_CHG_USB_CDP) == 1 ||
-		    extcon_get_state(chip->extcon, EXTCON_CHG_USB_ACA) == 1)
-			current_limit = 1500;
-
-		if (extcon_get_state(chip->extcon, EXTCON_CHG_USB_DCP) == 1)
-			current_limit = 2000;
-
-		msleep(50);
-	} while (current_limit == 0 && time_before(jiffies, timeout));
-
-	return current_limit;
-}
-
-static int fusb302_set_cc_pull(struct fusb302_chip *chip,
-			       bool pull_up, bool pull_down)
-{
-	int ret = 0;
-	u8 data = 0x00;
-	u8 mask = FUSB_REG_SWITCHES0_CC1_PU_EN |
-		  FUSB_REG_SWITCHES0_CC2_PU_EN |
-		  FUSB_REG_SWITCHES0_CC1_PD_EN |
-		  FUSB_REG_SWITCHES0_CC2_PD_EN;
-
-	if (pull_up)
-		data |= (chip->cc_polarity == TYPEC_POLARITY_CC1) ?
-			FUSB_REG_SWITCHES0_CC1_PU_EN :
-			FUSB_REG_SWITCHES0_CC2_PU_EN;
-	if (pull_down)
-		data |= FUSB_REG_SWITCHES0_CC1_PD_EN |
-			FUSB_REG_SWITCHES0_CC2_PD_EN;
-	ret = fusb302_i2c_mask_write(chip, FUSB_REG_SWITCHES0,
-				     mask, data);
-	if (ret < 0)
-		return ret;
-	chip->pull_up = pull_up;
-
-	return ret;
-}
-
-static int fusb302_set_src_current(struct fusb302_chip *chip,
-				   enum src_current_status status)
-{
-	int ret = 0;
-
-	chip->src_current_status = status;
-	switch (status) {
-	case SRC_CURRENT_DEFAULT:
-		ret = fusb302_i2c_mask_write(chip, FUSB_REG_CONTROL0,
-					     FUSB_REG_CONTROL0_HOST_CUR_MASK,
-					     FUSB_REG_CONTROL0_HOST_CUR_DEF);
-		break;
-	case SRC_CURRENT_MEDIUM:
-		ret = fusb302_i2c_mask_write(chip, FUSB_REG_CONTROL0,
-					     FUSB_REG_CONTROL0_HOST_CUR_MASK,
-					     FUSB_REG_CONTROL0_HOST_CUR_MED);
-		break;
-	case SRC_CURRENT_HIGH:
-		ret = fusb302_i2c_mask_write(chip, FUSB_REG_CONTROL0,
-					     FUSB_REG_CONTROL0_HOST_CUR_MASK,
-					     FUSB_REG_CONTROL0_HOST_CUR_HIGH);
-		break;
-	default:
-		break;
-	}
-
-	return ret;
-}
-
-static int fusb302_set_toggling(struct fusb302_chip *chip,
-				enum toggling_mode mode)
-{
-	int ret = 0;
-
-	/* first disable toggling */
-	ret = fusb302_i2c_clear_bits(chip, FUSB_REG_CONTROL2,
-				     FUSB_REG_CONTROL2_TOGGLE);
-	if (ret < 0)
-		return ret;
-	/* mask interrupts for SRC or SNK */
-	ret = fusb302_i2c_set_bits(chip, FUSB_REG_MASK,
-				   FUSB_REG_MASK_BC_LVL |
-				   FUSB_REG_MASK_COMP_CHNG);
-	if (ret < 0)
-		return ret;
-	chip->intr_bc_lvl = false;
-	chip->intr_comp_chng = false;
-	/* configure toggling mode: none/snk/src/drp */
-	switch (mode) {
-	case TOGGLINE_MODE_OFF:
-		ret = fusb302_i2c_mask_write(chip, FUSB_REG_CONTROL2,
-					     FUSB_REG_CONTROL2_MODE_MASK,
-					     FUSB_REG_CONTROL2_MODE_NONE);
-		if (ret < 0)
-			return ret;
-		break;
-	case TOGGLING_MODE_SNK:
-		ret = fusb302_i2c_mask_write(chip, FUSB_REG_CONTROL2,
-					     FUSB_REG_CONTROL2_MODE_MASK,
-					     FUSB_REG_CONTROL2_MODE_UFP);
-		if (ret < 0)
-			return ret;
-		break;
-	case TOGGLING_MODE_SRC:
-		ret = fusb302_i2c_mask_write(chip, FUSB_REG_CONTROL2,
-					     FUSB_REG_CONTROL2_MODE_MASK,
-					     FUSB_REG_CONTROL2_MODE_DFP);
-		if (ret < 0)
-			return ret;
-		break;
-	case TOGGLING_MODE_DRP:
-		ret = fusb302_i2c_mask_write(chip, FUSB_REG_CONTROL2,
-					     FUSB_REG_CONTROL2_MODE_MASK,
-					     FUSB_REG_CONTROL2_MODE_DRP);
-		if (ret < 0)
-			return ret;
-		break;
-	default:
-		break;
-	}
-
-	if (mode == TOGGLINE_MODE_OFF) {
-		/* mask TOGDONE interrupt */
-		ret = fusb302_i2c_set_bits(chip, FUSB_REG_MASKA,
-					   FUSB_REG_MASKA_TOGDONE);
-		if (ret < 0)
-			return ret;
-		chip->intr_togdone = false;
-	} else {
-		/* unmask TOGDONE interrupt */
-		ret = fusb302_i2c_clear_bits(chip, FUSB_REG_MASKA,
-					     FUSB_REG_MASKA_TOGDONE);
-		if (ret < 0)
-			return ret;
-		chip->intr_togdone = true;
-		/* start toggling */
-		ret = fusb302_i2c_set_bits(chip, FUSB_REG_CONTROL2,
-					   FUSB_REG_CONTROL2_TOGGLE);
-		if (ret < 0)
-			return ret;
-		/* during toggling, consider cc as Open */
-		chip->cc1 = TYPEC_CC_OPEN;
-		chip->cc2 = TYPEC_CC_OPEN;
-	}
-	chip->toggling_mode = mode;
-
-	return ret;
-}
-
-static const char * const typec_cc_status_name[] = {
-	[TYPEC_CC_OPEN]		= "Open",
-	[TYPEC_CC_RA]		= "Ra",
-	[TYPEC_CC_RD]		= "Rd",
-	[TYPEC_CC_RP_DEF]	= "Rp-def",
-	[TYPEC_CC_RP_1_5]	= "Rp-1.5",
-	[TYPEC_CC_RP_3_0]	= "Rp-3.0",
-};
-
-static const enum src_current_status cc_src_current[] = {
-	[TYPEC_CC_OPEN]		= SRC_CURRENT_DEFAULT,
-	[TYPEC_CC_RA]		= SRC_CURRENT_DEFAULT,
-	[TYPEC_CC_RD]		= SRC_CURRENT_DEFAULT,
-	[TYPEC_CC_RP_DEF]	= SRC_CURRENT_DEFAULT,
-	[TYPEC_CC_RP_1_5]	= SRC_CURRENT_MEDIUM,
-	[TYPEC_CC_RP_3_0]	= SRC_CURRENT_HIGH,
-};
-
-static int tcpm_set_cc(struct tcpc_dev *dev, enum typec_cc_status cc)
-{
-	struct fusb302_chip *chip = container_of(dev, struct fusb302_chip,
-						 tcpc_dev);
-	int ret = 0;
-	bool pull_up, pull_down;
-	u8 rd_mda;
-
-	mutex_lock(&chip->lock);
-	switch (cc) {
-	case TYPEC_CC_OPEN:
-		pull_up = false;
-		pull_down = false;
-		break;
-	case TYPEC_CC_RD:
-		pull_up = false;
-		pull_down = true;
-		break;
-	case TYPEC_CC_RP_DEF:
-	case TYPEC_CC_RP_1_5:
-	case TYPEC_CC_RP_3_0:
-		pull_up = true;
-		pull_down = false;
-		break;
-	default:
-		fusb302_log(chip, "unsupported cc value %s",
-			    typec_cc_status_name[cc]);
-		ret = -EINVAL;
-		goto done;
-	}
-	ret = fusb302_set_toggling(chip, TOGGLINE_MODE_OFF);
-	if (ret < 0) {
-		fusb302_log(chip, "cannot stop toggling, ret=%d", ret);
-		goto done;
-	}
-	ret = fusb302_set_cc_pull(chip, pull_up, pull_down);
-	if (ret < 0) {
-		fusb302_log(chip,
-			    "cannot set cc pulling up %s, down %s, ret = %d",
-			    pull_up ? "True" : "False",
-			    pull_down ? "True" : "False",
-			    ret);
-		goto done;
-	}
-	/* reset the cc status */
-	chip->cc1 = TYPEC_CC_OPEN;
-	chip->cc2 = TYPEC_CC_OPEN;
-	/* adjust current for SRC */
-	if (pull_up) {
-		ret = fusb302_set_src_current(chip, cc_src_current[cc]);
-		if (ret < 0) {
-			fusb302_log(chip, "cannot set src current %s, ret=%d",
-				    typec_cc_status_name[cc], ret);
-			goto done;
-		}
-	}
-	/* enable/disable interrupts, BC_LVL for SNK and COMP_CHNG for SRC */
-	if (pull_up) {
-		rd_mda = rd_mda_value[cc_src_current[cc]];
-		ret = fusb302_i2c_write(chip, FUSB_REG_MEASURE, rd_mda);
-		if (ret < 0) {
-			fusb302_log(chip,
-				    "cannot set SRC measure value, ret=%d",
-				    ret);
-			goto done;
-		}
-		ret = fusb302_i2c_mask_write(chip, FUSB_REG_MASK,
-					     FUSB_REG_MASK_BC_LVL |
-					     FUSB_REG_MASK_COMP_CHNG,
-					     FUSB_REG_MASK_COMP_CHNG);
-		if (ret < 0) {
-			fusb302_log(chip, "cannot set SRC interrupt, ret=%d",
-				    ret);
-			goto done;
-		}
-		chip->intr_bc_lvl = false;
-		chip->intr_comp_chng = true;
-	}
-	if (pull_down) {
-		ret = fusb302_i2c_mask_write(chip, FUSB_REG_MASK,
-					     FUSB_REG_MASK_BC_LVL |
-					     FUSB_REG_MASK_COMP_CHNG,
-					     FUSB_REG_MASK_BC_LVL);
-		if (ret < 0) {
-			fusb302_log(chip, "cannot set SRC interrupt, ret=%d",
-				    ret);
-			goto done;
-		}
-		chip->intr_bc_lvl = true;
-		chip->intr_comp_chng = false;
-	}
-	fusb302_log(chip, "cc := %s", typec_cc_status_name[cc]);
-done:
-	mutex_unlock(&chip->lock);
-
-	return ret;
-}
-
-static int tcpm_get_cc(struct tcpc_dev *dev, enum typec_cc_status *cc1,
-		       enum typec_cc_status *cc2)
-{
-	struct fusb302_chip *chip = container_of(dev, struct fusb302_chip,
-						 tcpc_dev);
-
-	mutex_lock(&chip->lock);
-	*cc1 = chip->cc1;
-	*cc2 = chip->cc2;
-	fusb302_log(chip, "cc1=%s, cc2=%s", typec_cc_status_name[*cc1],
-		    typec_cc_status_name[*cc2]);
-	mutex_unlock(&chip->lock);
-
-	return 0;
-}
-
-static int tcpm_set_polarity(struct tcpc_dev *dev,
-			     enum typec_cc_polarity polarity)
-{
-	return 0;
-}
-
-static int tcpm_set_vconn(struct tcpc_dev *dev, bool on)
-{
-	struct fusb302_chip *chip = container_of(dev, struct fusb302_chip,
-						 tcpc_dev);
-	int ret = 0;
-	u8 switches0_data = 0x00;
-	u8 switches0_mask = FUSB_REG_SWITCHES0_VCONN_CC1 |
-			    FUSB_REG_SWITCHES0_VCONN_CC2;
-
-	mutex_lock(&chip->lock);
-	if (chip->vconn_on == on) {
-		fusb302_log(chip, "vconn is already %s", on ? "On" : "Off");
-		goto done;
-	}
-	if (on) {
-		switches0_data = (chip->cc_polarity == TYPEC_POLARITY_CC1) ?
-				 FUSB_REG_SWITCHES0_VCONN_CC2 :
-				 FUSB_REG_SWITCHES0_VCONN_CC1;
-	}
-	ret = fusb302_i2c_mask_write(chip, FUSB_REG_SWITCHES0,
-				     switches0_mask, switches0_data);
-	if (ret < 0)
-		goto done;
-	chip->vconn_on = on;
-	fusb302_log(chip, "vconn := %s", on ? "On" : "Off");
-done:
-	mutex_unlock(&chip->lock);
-
-	return ret;
-}
-
-static int tcpm_set_vbus(struct tcpc_dev *dev, bool on, bool charge)
-{
-	struct fusb302_chip *chip = container_of(dev, struct fusb302_chip,
-						 tcpc_dev);
-	int ret = 0;
-
-	mutex_lock(&chip->lock);
-	if (chip->vbus_on == on) {
-		fusb302_log(chip, "vbus is already %s", on ? "On" : "Off");
-	} else {
-		if (on)
-			ret = regulator_enable(chip->vbus);
-		else
-			ret = regulator_disable(chip->vbus);
-		if (ret < 0) {
-			fusb302_log(chip, "cannot %s vbus regulator, ret=%d",
-				    on ? "enable" : "disable", ret);
-			goto done;
-		}
-		chip->vbus_on = on;
-		fusb302_log(chip, "vbus := %s", on ? "On" : "Off");
-	}
-	if (chip->charge_on == charge) {
-		fusb302_log(chip, "charge is already %s",
-			    charge ? "On" : "Off");
-	} else {
-		chip->charge_on = charge;
-		power_supply_changed(chip->psy);
-	}
-
-done:
-	mutex_unlock(&chip->lock);
-
-	return ret;
-}
-
-static int tcpm_set_current_limit(struct tcpc_dev *dev, u32 max_ma, u32 mv)
-{
-	struct fusb302_chip *chip = container_of(dev, struct fusb302_chip,
-						 tcpc_dev);
-
-	fusb302_log(chip, "current limit: %d ma, %d mv (not implemented)",
-		    max_ma, mv);
-
-	chip->supply_voltage = mv;
-	chip->current_limit = max_ma;
-
-	power_supply_changed(chip->psy);
-
-	return 0;
-}
-
-static int fusb302_pd_tx_flush(struct fusb302_chip *chip)
-{
-	return fusb302_i2c_set_bits(chip, FUSB_REG_CONTROL0,
-				    FUSB_REG_CONTROL0_TX_FLUSH);
-}
-
-static int fusb302_pd_rx_flush(struct fusb302_chip *chip)
-{
-	return fusb302_i2c_set_bits(chip, FUSB_REG_CONTROL1,
-				    FUSB_REG_CONTROL1_RX_FLUSH);
-}
-
-static int fusb302_pd_set_auto_goodcrc(struct fusb302_chip *chip, bool on)
-{
-	if (on)
-		return fusb302_i2c_set_bits(chip, FUSB_REG_SWITCHES1,
-					    FUSB_REG_SWITCHES1_AUTO_GCRC);
-	return fusb302_i2c_clear_bits(chip, FUSB_REG_SWITCHES1,
-					    FUSB_REG_SWITCHES1_AUTO_GCRC);
-}
-
-static int fusb302_pd_set_interrupts(struct fusb302_chip *chip, bool on)
-{
-	int ret = 0;
-	u8 mask_interrupts = FUSB_REG_MASK_COLLISION;
-	u8 maska_interrupts = FUSB_REG_MASKA_RETRYFAIL |
-			      FUSB_REG_MASKA_HARDSENT |
-			      FUSB_REG_MASKA_TX_SUCCESS |
-			      FUSB_REG_MASKA_HARDRESET;
-	u8 maskb_interrupts = FUSB_REG_MASKB_GCRCSENT;
-
-	ret = on ?
-		fusb302_i2c_clear_bits(chip, FUSB_REG_MASK, mask_interrupts) :
-		fusb302_i2c_set_bits(chip, FUSB_REG_MASK, mask_interrupts);
-	if (ret < 0)
-		return ret;
-	ret = on ?
-		fusb302_i2c_clear_bits(chip, FUSB_REG_MASKA, maska_interrupts) :
-		fusb302_i2c_set_bits(chip, FUSB_REG_MASKA, maska_interrupts);
-	if (ret < 0)
-		return ret;
-	ret = on ?
-		fusb302_i2c_clear_bits(chip, FUSB_REG_MASKB, maskb_interrupts) :
-		fusb302_i2c_set_bits(chip, FUSB_REG_MASKB, maskb_interrupts);
-	return ret;
-}
-
-static int tcpm_set_pd_rx(struct tcpc_dev *dev, bool on)
-{
-	struct fusb302_chip *chip = container_of(dev, struct fusb302_chip,
-						 tcpc_dev);
-	int ret = 0;
-
-	mutex_lock(&chip->lock);
-	ret = fusb302_pd_rx_flush(chip);
-	if (ret < 0) {
-		fusb302_log(chip, "cannot flush pd rx buffer, ret=%d", ret);
-		goto done;
-	}
-	ret = fusb302_pd_tx_flush(chip);
-	if (ret < 0) {
-		fusb302_log(chip, "cannot flush pd tx buffer, ret=%d", ret);
-		goto done;
-	}
-	ret = fusb302_pd_set_auto_goodcrc(chip, on);
-	if (ret < 0) {
-		fusb302_log(chip, "cannot turn %s auto GCRC, ret=%d",
-			    on ? "on" : "off", ret);
-		goto done;
-	}
-	ret = fusb302_pd_set_interrupts(chip, on);
-	if (ret < 0) {
-		fusb302_log(chip, "cannot turn %s pd interrupts, ret=%d",
-			    on ? "on" : "off", ret);
-		goto done;
-	}
-	fusb302_log(chip, "pd := %s", on ? "on" : "off");
-done:
-	mutex_unlock(&chip->lock);
-
-	return ret;
-}
-
-static const char * const typec_role_name[] = {
-	[TYPEC_SINK]		= "Sink",
-	[TYPEC_SOURCE]		= "Source",
-};
-
-static const char * const typec_data_role_name[] = {
-	[TYPEC_DEVICE]		= "Device",
-	[TYPEC_HOST]		= "Host",
-};
-
-static int tcpm_set_roles(struct tcpc_dev *dev, bool attached,
-			  enum typec_role pwr, enum typec_data_role data)
-{
-	struct fusb302_chip *chip = container_of(dev, struct fusb302_chip,
-						 tcpc_dev);
-	int ret = 0;
-	u8 switches1_mask = FUSB_REG_SWITCHES1_POWERROLE |
-			    FUSB_REG_SWITCHES1_DATAROLE;
-	u8 switches1_data = 0x00;
-
-	mutex_lock(&chip->lock);
-	if (pwr == TYPEC_SOURCE)
-		switches1_data |= FUSB_REG_SWITCHES1_POWERROLE;
-	if (data == TYPEC_HOST)
-		switches1_data |= FUSB_REG_SWITCHES1_DATAROLE;
-	ret = fusb302_i2c_mask_write(chip, FUSB_REG_SWITCHES1,
-				     switches1_mask, switches1_data);
-	if (ret < 0) {
-		fusb302_log(chip, "unable to set pd header %s, %s, ret=%d",
-			    typec_role_name[pwr], typec_data_role_name[data],
-			    ret);
-		goto done;
-	}
-	fusb302_log(chip, "pd header := %s, %s", typec_role_name[pwr],
-		    typec_data_role_name[data]);
-done:
-	mutex_unlock(&chip->lock);
-
-	return ret;
-}
-
-static int tcpm_start_drp_toggling(struct tcpc_dev *dev,
-				   enum typec_cc_status cc)
-{
-	struct fusb302_chip *chip = container_of(dev, struct fusb302_chip,
-						 tcpc_dev);
-	int ret = 0;
-
-	mutex_lock(&chip->lock);
-	ret = fusb302_set_src_current(chip, cc_src_current[cc]);
-	if (ret < 0) {
-		fusb302_log(chip, "unable to set src current %s, ret=%d",
-			    typec_cc_status_name[cc], ret);
-		goto done;
-	}
-	ret = fusb302_set_toggling(chip, TOGGLING_MODE_DRP);
-	if (ret < 0) {
-		fusb302_log(chip,
-			    "unable to start drp toggling, ret=%d", ret);
-		goto done;
-	}
-	fusb302_log(chip, "start drp toggling");
-done:
-	mutex_unlock(&chip->lock);
-
-	return ret;
-}
-
-static int fusb302_pd_send_message(struct fusb302_chip *chip,
-				   const struct pd_message *msg)
-{
-	int ret = 0;
-	u8 buf[40];
-	u8 pos = 0;
-	int len;
-
-	/* SOP tokens */
-	buf[pos++] = FUSB302_TKN_SYNC1;
-	buf[pos++] = FUSB302_TKN_SYNC1;
-	buf[pos++] = FUSB302_TKN_SYNC1;
-	buf[pos++] = FUSB302_TKN_SYNC2;
-
-	len = pd_header_cnt_le(msg->header) * 4;
-	/* plug 2 for header */
-	len += 2;
-	if (len > 0x1F) {
-		fusb302_log(chip,
-			    "PD message too long %d (incl. header)", len);
-		return -EINVAL;
-	}
-	/* packsym tells the FUSB302 chip that the next X bytes are payload */
-	buf[pos++] = FUSB302_TKN_PACKSYM | (len & 0x1F);
-	memcpy(&buf[pos], &msg->header, sizeof(msg->header));
-	pos += sizeof(msg->header);
-
-	len -= 2;
-	memcpy(&buf[pos], msg->payload, len);
-	pos += len;
-
-	/* CRC */
-	buf[pos++] = FUSB302_TKN_JAMCRC;
-	/* EOP */
-	buf[pos++] = FUSB302_TKN_EOP;
-	/* turn tx off after sending message */
-	buf[pos++] = FUSB302_TKN_TXOFF;
-	/* start transmission */
-	buf[pos++] = FUSB302_TKN_TXON;
-
-	ret = fusb302_i2c_block_write(chip, FUSB_REG_FIFOS, pos, buf);
-	if (ret < 0)
-		return ret;
-	fusb302_log(chip, "sending PD message header: %x", msg->header);
-	fusb302_log(chip, "sending PD message len: %d", len);
-
-	return ret;
-}
-
-static int fusb302_pd_send_hardreset(struct fusb302_chip *chip)
-{
-	return fusb302_i2c_set_bits(chip, FUSB_REG_CONTROL3,
-				    FUSB_REG_CONTROL3_SEND_HARDRESET);
-}
-
-static const char * const transmit_type_name[] = {
-	[TCPC_TX_SOP]			= "SOP",
-	[TCPC_TX_SOP_PRIME]		= "SOP'",
-	[TCPC_TX_SOP_PRIME_PRIME]	= "SOP''",
-	[TCPC_TX_SOP_DEBUG_PRIME]	= "DEBUG'",
-	[TCPC_TX_SOP_DEBUG_PRIME_PRIME]	= "DEBUG''",
-	[TCPC_TX_HARD_RESET]		= "HARD_RESET",
-	[TCPC_TX_CABLE_RESET]		= "CABLE_RESET",
-	[TCPC_TX_BIST_MODE_2]		= "BIST_MODE_2",
-};
-
-static int tcpm_pd_transmit(struct tcpc_dev *dev, enum tcpm_transmit_type type,
-			    const struct pd_message *msg)
-{
-	struct fusb302_chip *chip = container_of(dev, struct fusb302_chip,
-						 tcpc_dev);
-	int ret = 0;
-
-	mutex_lock(&chip->lock);
-	switch (type) {
-	case TCPC_TX_SOP:
-		ret = fusb302_pd_send_message(chip, msg);
-		if (ret < 0)
-			fusb302_log(chip,
-				    "cannot send PD message, ret=%d", ret);
-		break;
-	case TCPC_TX_HARD_RESET:
-		ret = fusb302_pd_send_hardreset(chip);
-		if (ret < 0)
-			fusb302_log(chip,
-				    "cannot send hardreset, ret=%d", ret);
-		break;
-	default:
-		fusb302_log(chip, "type %s not supported",
-			    transmit_type_name[type]);
-		ret = -EINVAL;
-	}
-	mutex_unlock(&chip->lock);
-
-	return ret;
-}
-
-static enum typec_cc_status fusb302_bc_lvl_to_cc(u8 bc_lvl)
-{
-	if (bc_lvl == FUSB_REG_STATUS0_BC_LVL_1230_MAX)
-		return TYPEC_CC_RP_3_0;
-	if (bc_lvl == FUSB_REG_STATUS0_BC_LVL_600_1230)
-		return TYPEC_CC_RP_1_5;
-	if (bc_lvl == FUSB_REG_STATUS0_BC_LVL_200_600)
-		return TYPEC_CC_RP_DEF;
-	return TYPEC_CC_OPEN;
-}
-
-static void fusb302_bc_lvl_handler_work(struct work_struct *work)
-{
-	struct fusb302_chip *chip = container_of(work, struct fusb302_chip,
-						 bc_lvl_handler.work);
-	int ret = 0;
-	u8 status0;
-	u8 bc_lvl;
-	enum typec_cc_status cc_status;
-
-	mutex_lock(&chip->lock);
-	if (!chip->intr_bc_lvl) {
-		fusb302_log(chip, "BC_LVL interrupt is turned off, abort");
-		goto done;
-	}
-	ret = fusb302_i2c_read(chip, FUSB_REG_STATUS0, &status0);
-	if (ret < 0)
-		goto done;
-	fusb302_log(chip, "BC_LVL handler, status0=0x%02x", status0);
-	if (status0 & FUSB_REG_STATUS0_ACTIVITY) {
-		fusb302_log(chip, "CC activities detected, delay handling");
-		mod_delayed_work(chip->wq, &chip->bc_lvl_handler,
-				 msecs_to_jiffies(T_BC_LVL_DEBOUNCE_DELAY_MS));
-		goto done;
-	}
-	bc_lvl = status0 & FUSB_REG_STATUS0_BC_LVL_MASK;
-	cc_status = fusb302_bc_lvl_to_cc(bc_lvl);
-	if (chip->cc_polarity == TYPEC_POLARITY_CC1) {
-		if (chip->cc1 != cc_status) {
-			fusb302_log(chip, "cc1: %s -> %s",
-				    typec_cc_status_name[chip->cc1],
-				    typec_cc_status_name[cc_status]);
-			chip->cc1 = cc_status;
-			tcpm_cc_change(chip->tcpm_port);
-		}
-	} else {
-		if (chip->cc2 != cc_status) {
-			fusb302_log(chip, "cc2: %s -> %s",
-				    typec_cc_status_name[chip->cc2],
-				    typec_cc_status_name[cc_status]);
-			chip->cc2 = cc_status;
-			tcpm_cc_change(chip->tcpm_port);
-		}
-	}
-
-done:
-	mutex_unlock(&chip->lock);
-}
-
-#define PDO_FIXED_FLAGS \
-	(PDO_FIXED_DUAL_ROLE | PDO_FIXED_DATA_SWAP | PDO_FIXED_USB_COMM)
-
-static const u32 src_pdo[] = {
-	PDO_FIXED(5000, 400, PDO_FIXED_FLAGS),
-};
-
-static const u32 snk_pdo[] = {
-	PDO_FIXED(5000, 400, PDO_FIXED_FLAGS),
-};
-
-static const struct tcpc_config fusb302_tcpc_config = {
-	.src_pdo = src_pdo,
-	.nr_src_pdo = ARRAY_SIZE(src_pdo),
-	.snk_pdo = snk_pdo,
-	.nr_snk_pdo = ARRAY_SIZE(snk_pdo),
-	.max_snk_mv = 5000,
-	.max_snk_ma = 3000,
-	.max_snk_mw = 15000,
-	.operating_snk_mw = 2500,
-	.type = TYPEC_PORT_DRP,
-	.default_role = TYPEC_SINK,
-	.alt_modes = NULL,
-};
-
-static void init_tcpc_dev(struct tcpc_dev *fusb302_tcpc_dev)
-{
-	fusb302_tcpc_dev->init = tcpm_init;
-	fusb302_tcpc_dev->get_vbus = tcpm_get_vbus;
-	fusb302_tcpc_dev->get_current_limit = tcpm_get_current_limit;
-	fusb302_tcpc_dev->set_cc = tcpm_set_cc;
-	fusb302_tcpc_dev->get_cc = tcpm_get_cc;
-	fusb302_tcpc_dev->set_polarity = tcpm_set_polarity;
-	fusb302_tcpc_dev->set_vconn = tcpm_set_vconn;
-	fusb302_tcpc_dev->set_vbus = tcpm_set_vbus;
-	fusb302_tcpc_dev->set_current_limit = tcpm_set_current_limit;
-	fusb302_tcpc_dev->set_pd_rx = tcpm_set_pd_rx;
-	fusb302_tcpc_dev->set_roles = tcpm_set_roles;
-	fusb302_tcpc_dev->start_drp_toggling = tcpm_start_drp_toggling;
-	fusb302_tcpc_dev->pd_transmit = tcpm_pd_transmit;
-	fusb302_tcpc_dev->mux = NULL;
-}
-
-static const char * const cc_polarity_name[] = {
-	[TYPEC_POLARITY_CC1]	= "Polarity_CC1",
-	[TYPEC_POLARITY_CC2]	= "Polarity_CC2",
-};
-
-static int fusb302_set_cc_polarity(struct fusb302_chip *chip,
-				   enum typec_cc_polarity cc_polarity)
-{
-	int ret = 0;
-	u8 switches0_mask = FUSB_REG_SWITCHES0_CC1_PU_EN |
-			    FUSB_REG_SWITCHES0_CC2_PU_EN |
-			    FUSB_REG_SWITCHES0_VCONN_CC1 |
-			    FUSB_REG_SWITCHES0_VCONN_CC2 |
-			    FUSB_REG_SWITCHES0_MEAS_CC1 |
-			    FUSB_REG_SWITCHES0_MEAS_CC2;
-	u8 switches0_data = 0x00;
-	u8 switches1_mask = FUSB_REG_SWITCHES1_TXCC1_EN |
-			    FUSB_REG_SWITCHES1_TXCC2_EN;
-	u8 switches1_data = 0x00;
-
-	if (cc_polarity == TYPEC_POLARITY_CC1) {
-		switches0_data = FUSB_REG_SWITCHES0_MEAS_CC1;
-		if (chip->vconn_on)
-			switches0_data |= FUSB_REG_SWITCHES0_VCONN_CC2;
-		if (chip->pull_up)
-			switches0_data |= FUSB_REG_SWITCHES0_CC1_PU_EN;
-		switches1_data = FUSB_REG_SWITCHES1_TXCC1_EN;
-	} else {
-		switches0_data = FUSB_REG_SWITCHES0_MEAS_CC2;
-		if (chip->vconn_on)
-			switches0_data |= FUSB_REG_SWITCHES0_VCONN_CC1;
-		if (chip->pull_up)
-			switches0_data |= FUSB_REG_SWITCHES0_CC2_PU_EN;
-		switches1_data = FUSB_REG_SWITCHES1_TXCC2_EN;
-	}
-	ret = fusb302_i2c_mask_write(chip, FUSB_REG_SWITCHES0,
-				     switches0_mask, switches0_data);
-	if (ret < 0)
-		return ret;
-	ret = fusb302_i2c_mask_write(chip, FUSB_REG_SWITCHES1,
-				     switches1_mask, switches1_data);
-	if (ret < 0)
-		return ret;
-	chip->cc_polarity = cc_polarity;
-
-	return ret;
-}
-
-static int fusb302_handle_togdone_snk(struct fusb302_chip *chip,
-				      u8 togdone_result)
-{
-	int ret = 0;
-	u8 status0;
-	u8 bc_lvl;
-	enum typec_cc_polarity cc_polarity;
-	enum typec_cc_status cc_status_active, cc1, cc2;
-
-	/* set pull_up, pull_down */
-	ret = fusb302_set_cc_pull(chip, false, true);
-	if (ret < 0) {
-		fusb302_log(chip, "cannot set cc to pull down, ret=%d", ret);
-		return ret;
-	}
-	/* set polarity */
-	cc_polarity = (togdone_result == FUSB_REG_STATUS1A_TOGSS_SNK1) ?
-		      TYPEC_POLARITY_CC1 : TYPEC_POLARITY_CC2;
-	ret = fusb302_set_cc_polarity(chip, cc_polarity);
-	if (ret < 0) {
-		fusb302_log(chip, "cannot set cc polarity %s, ret=%d",
-			    cc_polarity_name[cc_polarity], ret);
-		return ret;
-	}
-	/* fusb302_set_cc_polarity() has set the correct measure block */
-	ret = fusb302_i2c_read(chip, FUSB_REG_STATUS0, &status0);
-	if (ret < 0)
-		return ret;
-	bc_lvl = status0 & FUSB_REG_STATUS0_BC_LVL_MASK;
-	cc_status_active = fusb302_bc_lvl_to_cc(bc_lvl);
-	/* restart toggling if the cc status on the active line is OPEN */
-	if (cc_status_active == TYPEC_CC_OPEN) {
-		fusb302_log(chip, "restart toggling as CC_OPEN detected");
-		ret = fusb302_set_toggling(chip, chip->toggling_mode);
-		return ret;
-	}
-	/* update tcpm with the new cc value */
-	cc1 = (cc_polarity == TYPEC_POLARITY_CC1) ?
-	      cc_status_active : TYPEC_CC_OPEN;
-	cc2 = (cc_polarity == TYPEC_POLARITY_CC2) ?
-	      cc_status_active : TYPEC_CC_OPEN;
-	if ((chip->cc1 != cc1) || (chip->cc2 != cc2)) {
-		chip->cc1 = cc1;
-		chip->cc2 = cc2;
-		tcpm_cc_change(chip->tcpm_port);
-	}
-	/* turn off toggling */
-	ret = fusb302_set_toggling(chip, TOGGLINE_MODE_OFF);
-	if (ret < 0) {
-		fusb302_log(chip,
-			    "cannot set toggling mode off, ret=%d", ret);
-		return ret;
-	}
-	/* unmask bc_lvl interrupt */
-	ret = fusb302_i2c_clear_bits(chip, FUSB_REG_MASK, FUSB_REG_MASK_BC_LVL);
-	if (ret < 0) {
-		fusb302_log(chip,
-			    "cannot unmask bc_lcl interrupt, ret=%d", ret);
-		return ret;
-	}
-	chip->intr_bc_lvl = true;
-	fusb302_log(chip, "detected cc1=%s, cc2=%s",
-		    typec_cc_status_name[cc1],
-		    typec_cc_status_name[cc2]);
-
-	return ret;
-}
-
-static int fusb302_handle_togdone_src(struct fusb302_chip *chip,
-				      u8 togdone_result)
-{
-	/*
-	 * - set polarity (measure cc, vconn, tx)
-	 * - set pull_up, pull_down
-	 * - set cc1, cc2, and update to tcpm_port
-	 * - set I_COMP interrupt on
-	 */
-	int ret = 0;
-	u8 status0;
-	u8 ra_mda = ra_mda_value[chip->src_current_status];
-	u8 rd_mda = rd_mda_value[chip->src_current_status];
-	bool ra_comp, rd_comp;
-	enum typec_cc_polarity cc_polarity;
-	enum typec_cc_status cc_status_active, cc1, cc2;
-
-	/* set pull_up, pull_down */
-	ret = fusb302_set_cc_pull(chip, true, false);
-	if (ret < 0) {
-		fusb302_log(chip, "cannot set cc to pull up, ret=%d", ret);
-		return ret;
-	}
-	/* set polarity */
-	cc_polarity = (togdone_result == FUSB_REG_STATUS1A_TOGSS_SRC1) ?
-		      TYPEC_POLARITY_CC1 : TYPEC_POLARITY_CC2;
-	ret = fusb302_set_cc_polarity(chip, cc_polarity);
-	if (ret < 0) {
-		fusb302_log(chip, "cannot set cc polarity %s, ret=%d",
-			    cc_polarity_name[cc_polarity], ret);
-		return ret;
-	}
-	/* fusb302_set_cc_polarity() has set the correct measure block */
-	ret = fusb302_i2c_write(chip, FUSB_REG_MEASURE, rd_mda);
-	if (ret < 0)
-		return ret;
-	usleep_range(50, 100);
-	ret = fusb302_i2c_read(chip, FUSB_REG_STATUS0, &status0);
-	if (ret < 0)
-		return ret;
-	rd_comp = !!(status0 & FUSB_REG_STATUS0_COMP);
-	if (!rd_comp) {
-		ret = fusb302_i2c_write(chip, FUSB_REG_MEASURE, ra_mda);
-		if (ret < 0)
-			return ret;
-		usleep_range(50, 100);
-		ret = fusb302_i2c_read(chip, FUSB_REG_STATUS0, &status0);
-		if (ret < 0)
-			return ret;
-		ra_comp = !!(status0 & FUSB_REG_STATUS0_COMP);
-	}
-	if (rd_comp)
-		cc_status_active = TYPEC_CC_OPEN;
-	else if (ra_comp)
-		cc_status_active = TYPEC_CC_RD;
-	else
-		/* Ra is not supported, report as Open */
-		cc_status_active = TYPEC_CC_OPEN;
-	/* restart toggling if the cc status on the active line is OPEN */
-	if (cc_status_active == TYPEC_CC_OPEN) {
-		fusb302_log(chip, "restart toggling as CC_OPEN detected");
-		ret = fusb302_set_toggling(chip, chip->toggling_mode);
-		return ret;
-	}
-	/* update tcpm with the new cc value */
-	cc1 = (cc_polarity == TYPEC_POLARITY_CC1) ?
-	      cc_status_active : TYPEC_CC_OPEN;
-	cc2 = (cc_polarity == TYPEC_POLARITY_CC2) ?
-	      cc_status_active : TYPEC_CC_OPEN;
-	if ((chip->cc1 != cc1) || (chip->cc2 != cc2)) {
-		chip->cc1 = cc1;
-		chip->cc2 = cc2;
-		tcpm_cc_change(chip->tcpm_port);
-	}
-	/* turn off toggling */
-	ret = fusb302_set_toggling(chip, TOGGLINE_MODE_OFF);
-	if (ret < 0) {
-		fusb302_log(chip,
-			    "cannot set toggling mode off, ret=%d", ret);
-		return ret;
-	}
-	/* set MDAC to Rd threshold, and unmask I_COMP for unplug detection */
-	ret = fusb302_i2c_write(chip, FUSB_REG_MEASURE, rd_mda);
-	if (ret < 0)
-		return ret;
-	/* unmask comp_chng interrupt */
-	ret = fusb302_i2c_clear_bits(chip, FUSB_REG_MASK,
-				     FUSB_REG_MASK_COMP_CHNG);
-	if (ret < 0) {
-		fusb302_log(chip,
-			    "cannot unmask bc_lcl interrupt, ret=%d", ret);
-		return ret;
-	}
-	chip->intr_comp_chng = true;
-	fusb302_log(chip, "detected cc1=%s, cc2=%s",
-		    typec_cc_status_name[cc1],
-		    typec_cc_status_name[cc2]);
-
-	return ret;
-}
-
-static int fusb302_handle_togdone(struct fusb302_chip *chip)
-{
-	int ret = 0;
-	u8 status1a;
-	u8 togdone_result;
-
-	ret = fusb302_i2c_read(chip, FUSB_REG_STATUS1A, &status1a);
-	if (ret < 0)
-		return ret;
-	togdone_result = (status1a >> FUSB_REG_STATUS1A_TOGSS_POS) &
-			 FUSB_REG_STATUS1A_TOGSS_MASK;
-	switch (togdone_result) {
-	case FUSB_REG_STATUS1A_TOGSS_SNK1:
-	case FUSB_REG_STATUS1A_TOGSS_SNK2:
-		return fusb302_handle_togdone_snk(chip, togdone_result);
-	case FUSB_REG_STATUS1A_TOGSS_SRC1:
-	case FUSB_REG_STATUS1A_TOGSS_SRC2:
-		return fusb302_handle_togdone_src(chip, togdone_result);
-	case FUSB_REG_STATUS1A_TOGSS_AA:
-		/* doesn't support */
-		fusb302_log(chip, "AudioAccessory not supported");
-		fusb302_set_toggling(chip, chip->toggling_mode);
-		break;
-	default:
-		fusb302_log(chip, "TOGDONE with an invalid state: %d",
-			    togdone_result);
-		fusb302_set_toggling(chip, chip->toggling_mode);
-		break;
-	}
-	return ret;
-}
-
-static int fusb302_pd_reset(struct fusb302_chip *chip)
-{
-	return fusb302_i2c_set_bits(chip, FUSB_REG_RESET,
-				    FUSB_REG_RESET_PD_RESET);
-}
-
-static int fusb302_pd_read_message(struct fusb302_chip *chip,
-				   struct pd_message *msg)
-{
-	int ret = 0;
-	u8 token;
-	u8 crc[4];
-	int len;
-
-	/* first SOP token */
-	ret = fusb302_i2c_read(chip, FUSB_REG_FIFOS, &token);
-	if (ret < 0)
-		return ret;
-	ret = fusb302_i2c_block_read(chip, FUSB_REG_FIFOS, 2,
-				     (u8 *)&msg->header);
-	if (ret < 0)
-		return ret;
-	len = pd_header_cnt_le(msg->header) * 4;
-	/* add 4 to length to include the CRC */
-	if (len > PD_MAX_PAYLOAD * 4) {
-		fusb302_log(chip, "PD message too long %d", len);
-		return -EINVAL;
-	}
-	if (len > 0) {
-		ret = fusb302_i2c_block_read(chip, FUSB_REG_FIFOS, len,
-					     (u8 *)msg->payload);
-		if (ret < 0)
-			return ret;
-	}
-	/* another 4 bytes to read CRC out */
-	ret = fusb302_i2c_block_read(chip, FUSB_REG_FIFOS, 4, crc);
-	if (ret < 0)
-		return ret;
-	fusb302_log(chip, "PD message header: %x", msg->header);
-	fusb302_log(chip, "PD message len: %d", len);
-
-	return ret;
-}
-
-static irqreturn_t fusb302_irq_intn(int irq, void *dev_id)
-{
-	struct fusb302_chip *chip = dev_id;
-	int ret = 0;
-	u8 interrupt;
-	u8 interrupta;
-	u8 interruptb;
-	u8 status0;
-	bool vbus_present;
-	bool comp_result;
-	bool intr_togdone;
-	bool intr_bc_lvl;
-	bool intr_comp_chng;
-	struct pd_message pd_msg;
-
-	mutex_lock(&chip->lock);
-	/* grab a snapshot of intr flags */
-	intr_togdone = chip->intr_togdone;
-	intr_bc_lvl = chip->intr_bc_lvl;
-	intr_comp_chng = chip->intr_comp_chng;
-
-	ret = fusb302_i2c_read(chip, FUSB_REG_INTERRUPT, &interrupt);
-	if (ret < 0)
-		goto done;
-	ret = fusb302_i2c_read(chip, FUSB_REG_INTERRUPTA, &interrupta);
-	if (ret < 0)
-		goto done;
-	ret = fusb302_i2c_read(chip, FUSB_REG_INTERRUPTB, &interruptb);
-	if (ret < 0)
-		goto done;
-	ret = fusb302_i2c_read(chip, FUSB_REG_STATUS0, &status0);
-	if (ret < 0)
-		goto done;
-	fusb302_log(chip,
-		    "IRQ: 0x%02x, a: 0x%02x, b: 0x%02x, status0: 0x%02x",
-		    interrupt, interrupta, interruptb, status0);
-
-	if (interrupt & FUSB_REG_INTERRUPT_VBUSOK) {
-		vbus_present = !!(status0 & FUSB_REG_STATUS0_VBUSOK);
-		fusb302_log(chip, "IRQ: VBUS_OK, vbus=%s",
-			    vbus_present ? "On" : "Off");
-		if (vbus_present != chip->vbus_present) {
-			chip->vbus_present = vbus_present;
-			tcpm_vbus_change(chip->tcpm_port);
-		}
-	}
-
-	if ((interrupta & FUSB_REG_INTERRUPTA_TOGDONE) && intr_togdone) {
-		fusb302_log(chip, "IRQ: TOGDONE");
-		ret = fusb302_handle_togdone(chip);
-		if (ret < 0) {
-			fusb302_log(chip,
-				    "handle togdone error, ret=%d", ret);
-			goto done;
-		}
-	}
-
-	if ((interrupt & FUSB_REG_INTERRUPT_BC_LVL) && intr_bc_lvl) {
-		fusb302_log(chip, "IRQ: BC_LVL, handler pending");
-		/*
-		 * as BC_LVL interrupt can be affected by PD activity,
-		 * apply delay to for the handler to wait for the PD
-		 * signaling to finish.
-		 */
-		mod_delayed_work(chip->wq, &chip->bc_lvl_handler,
-				 msecs_to_jiffies(T_BC_LVL_DEBOUNCE_DELAY_MS));
-	}
-
-	if ((interrupt & FUSB_REG_INTERRUPT_COMP_CHNG) && intr_comp_chng) {
-		comp_result = !!(status0 & FUSB_REG_STATUS0_COMP);
-		fusb302_log(chip, "IRQ: COMP_CHNG, comp=%s",
-			    comp_result ? "true" : "false");
-		if (comp_result) {
-			/* cc level > Rd_threashold, detach */
-			if (chip->cc_polarity == TYPEC_POLARITY_CC1)
-				chip->cc1 = TYPEC_CC_OPEN;
-			else
-				chip->cc2 = TYPEC_CC_OPEN;
-			tcpm_cc_change(chip->tcpm_port);
-		}
-	}
-
-	if (interrupt & FUSB_REG_INTERRUPT_COLLISION) {
-		fusb302_log(chip, "IRQ: PD collision");
-		tcpm_pd_transmit_complete(chip->tcpm_port, TCPC_TX_FAILED);
-	}
-
-	if (interrupta & FUSB_REG_INTERRUPTA_RETRYFAIL) {
-		fusb302_log(chip, "IRQ: PD retry failed");
-		tcpm_pd_transmit_complete(chip->tcpm_port, TCPC_TX_FAILED);
-	}
-
-	if (interrupta & FUSB_REG_INTERRUPTA_HARDSENT) {
-		fusb302_log(chip, "IRQ: PD hardreset sent");
-		ret = fusb302_pd_reset(chip);
-		if (ret < 0) {
-			fusb302_log(chip, "cannot PD reset, ret=%d", ret);
-			goto done;
-		}
-		tcpm_pd_transmit_complete(chip->tcpm_port, TCPC_TX_SUCCESS);
-	}
-
-	if (interrupta & FUSB_REG_INTERRUPTA_TX_SUCCESS) {
-		fusb302_log(chip, "IRQ: PD tx success");
-		/* read out the received good CRC */
-		ret = fusb302_pd_read_message(chip, &pd_msg);
-		if (ret < 0) {
-			fusb302_log(chip, "cannot read in GCRC, ret=%d", ret);
-			goto done;
-		}
-		tcpm_pd_transmit_complete(chip->tcpm_port, TCPC_TX_SUCCESS);
-	}
-
-	if (interrupta & FUSB_REG_INTERRUPTA_HARDRESET) {
-		fusb302_log(chip, "IRQ: PD received hardreset");
-		ret = fusb302_pd_reset(chip);
-		if (ret < 0) {
-			fusb302_log(chip, "cannot PD reset, ret=%d", ret);
-			goto done;
-		}
-		tcpm_pd_hard_reset(chip->tcpm_port);
-	}
-
-	if (interruptb & FUSB_REG_INTERRUPTB_GCRCSENT) {
-		fusb302_log(chip, "IRQ: PD sent good CRC");
-		ret = fusb302_pd_read_message(chip, &pd_msg);
-		if (ret < 0) {
-			fusb302_log(chip,
-				    "cannot read in PD message, ret=%d", ret);
-			goto done;
-		}
-		tcpm_pd_receive(chip->tcpm_port, &pd_msg);
-	}
-done:
-	mutex_unlock(&chip->lock);
-
-	return IRQ_HANDLED;
-}
-
-static int fusb302_psy_get_property(struct power_supply *psy,
-				    enum power_supply_property psp,
-				    union power_supply_propval *val)
-{
-	struct fusb302_chip *chip = power_supply_get_drvdata(psy);
-
-	switch (psp) {
-	case POWER_SUPPLY_PROP_ONLINE:
-		val->intval = chip->charge_on;
-		break;
-	case POWER_SUPPLY_PROP_VOLTAGE_NOW:
-		val->intval = chip->supply_voltage * 1000; /* mV -> µV */
-		break;
-	case POWER_SUPPLY_PROP_CURRENT_MAX:
-		val->intval = chip->current_limit * 1000; /* mA -> µA */
-		break;
-	default:
-		return -ENODATA;
-	}
-
-	return 0;
-}
-
-static enum power_supply_property fusb302_psy_properties[] = {
-	POWER_SUPPLY_PROP_ONLINE,
-	POWER_SUPPLY_PROP_VOLTAGE_NOW,
-	POWER_SUPPLY_PROP_CURRENT_MAX,
-};
-
-static const struct power_supply_desc fusb302_psy_desc = {
-	.name		= "fusb302-typec-source",
-	.type		= POWER_SUPPLY_TYPE_USB_TYPE_C,
-	.properties	= fusb302_psy_properties,
-	.num_properties	= ARRAY_SIZE(fusb302_psy_properties),
-	.get_property	= fusb302_psy_get_property,
-};
-
-static int init_gpio(struct fusb302_chip *chip)
-{
-	struct device_node *node;
-	int ret = 0;
-
-	node = chip->dev->of_node;
-	chip->gpio_int_n = of_get_named_gpio(node, "fcs,int_n", 0);
-	if (!gpio_is_valid(chip->gpio_int_n)) {
-		ret = chip->gpio_int_n;
-		fusb302_log(chip, "cannot get named GPIO Int_N, ret=%d", ret);
-		return ret;
-	}
-	ret = devm_gpio_request(chip->dev, chip->gpio_int_n, "fcs,int_n");
-	if (ret < 0) {
-		fusb302_log(chip, "cannot request GPIO Int_N, ret=%d", ret);
-		return ret;
-	}
-	ret = gpio_direction_input(chip->gpio_int_n);
-	if (ret < 0) {
-		fusb302_log(chip,
-			    "cannot set GPIO Int_N to input, ret=%d", ret);
-		return ret;
-	}
-	ret = gpio_to_irq(chip->gpio_int_n);
-	if (ret < 0) {
-		fusb302_log(chip,
-			    "cannot request IRQ for GPIO Int_N, ret=%d", ret);
-		return ret;
-	}
-	chip->gpio_int_n_irq = ret;
-	return 0;
-}
-
-static int fusb302_probe(struct i2c_client *client,
-			 const struct i2c_device_id *id)
-{
-	struct fusb302_chip *chip;
-	struct i2c_adapter *adapter;
-	struct device *dev = &client->dev;
-	struct power_supply_config cfg = {};
-	const char *name;
-	int ret = 0;
-	u32 v;
-
-	adapter = to_i2c_adapter(client->dev.parent);
-	if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_I2C_BLOCK)) {
-		dev_err(&client->dev,
-			"I2C/SMBus block functionality not supported!\n");
-		return -ENODEV;
-	}
-	chip = devm_kzalloc(&client->dev, sizeof(*chip), GFP_KERNEL);
-	if (!chip)
-		return -ENOMEM;
-
-	chip->i2c_client = client;
-	i2c_set_clientdata(client, chip);
-	chip->dev = &client->dev;
-	chip->tcpc_config = fusb302_tcpc_config;
-	chip->tcpc_dev.config = &chip->tcpc_config;
-	mutex_init(&chip->lock);
-
-	if (!device_property_read_u32(dev, "fcs,max-sink-microvolt", &v))
-		chip->tcpc_config.max_snk_mv = v / 1000;
-
-	if (!device_property_read_u32(dev, "fcs,max-sink-microamp", &v))
-		chip->tcpc_config.max_snk_ma = v / 1000;
-
-	if (!device_property_read_u32(dev, "fcs,max-sink-microwatt", &v))
-		chip->tcpc_config.max_snk_mw = v / 1000;
-
-	if (!device_property_read_u32(dev, "fcs,operating-sink-microwatt", &v))
-		chip->tcpc_config.operating_snk_mw = v / 1000;
-
-	/*
-	 * Devicetree platforms should get extcon via phandle (not yet
-	 * supported). On ACPI platforms, we get the name from a device prop.
-	 * This device prop is for kernel internal use only and is expected
-	 * to be set by the platform code which also registers the i2c client
-	 * for the fusb302.
-	 */
-	if (device_property_read_string(dev, "fcs,extcon-name", &name) == 0) {
-		chip->extcon = extcon_get_extcon_dev(name);
-		if (!chip->extcon)
-			return -EPROBE_DEFER;
-	}
-
-	cfg.drv_data = chip;
-	chip->psy = devm_power_supply_register(dev, &fusb302_psy_desc, &cfg);
-	if (IS_ERR(chip->psy)) {
-		ret = PTR_ERR(chip->psy);
-		dev_err(chip->dev, "Error registering power-supply: %d\n", ret);
-		return ret;
-	}
-
-	ret = fusb302_debugfs_init(chip);
-	if (ret < 0)
-		return ret;
-
-	chip->wq = create_singlethread_workqueue(dev_name(chip->dev));
-	if (!chip->wq) {
-		ret = -ENOMEM;
-		goto clear_client_data;
-	}
-	INIT_DELAYED_WORK(&chip->bc_lvl_handler, fusb302_bc_lvl_handler_work);
-	init_tcpc_dev(&chip->tcpc_dev);
-
-	chip->vbus = devm_regulator_get(chip->dev, "vbus");
-	if (IS_ERR(chip->vbus)) {
-		ret = PTR_ERR(chip->vbus);
-		goto destroy_workqueue;
-	}
-
-	if (client->irq) {
-		chip->gpio_int_n_irq = client->irq;
-	} else {
-		ret = init_gpio(chip);
-		if (ret < 0)
-			goto destroy_workqueue;
-	}
-
-	chip->tcpm_port = tcpm_register_port(&client->dev, &chip->tcpc_dev);
-	if (IS_ERR(chip->tcpm_port)) {
-		ret = PTR_ERR(chip->tcpm_port);
-		fusb302_log(chip, "cannot register tcpm port, ret=%d", ret);
-		goto destroy_workqueue;
-	}
-
-	ret = devm_request_threaded_irq(chip->dev, chip->gpio_int_n_irq,
-					NULL, fusb302_irq_intn,
-					IRQF_ONESHOT | IRQF_TRIGGER_LOW,
-					"fsc_interrupt_int_n", chip);
-	if (ret < 0) {
-		fusb302_log(chip,
-			    "cannot request IRQ for GPIO Int_N, ret=%d", ret);
-		goto tcpm_unregister_port;
-	}
-	enable_irq_wake(chip->gpio_int_n_irq);
-	return ret;
-
-tcpm_unregister_port:
-	tcpm_unregister_port(chip->tcpm_port);
-destroy_workqueue:
-	destroy_workqueue(chip->wq);
-clear_client_data:
-	i2c_set_clientdata(client, NULL);
-	fusb302_debugfs_exit(chip);
-
-	return ret;
-}
-
-static int fusb302_remove(struct i2c_client *client)
-{
-	struct fusb302_chip *chip = i2c_get_clientdata(client);
-
-	tcpm_unregister_port(chip->tcpm_port);
-	destroy_workqueue(chip->wq);
-	i2c_set_clientdata(client, NULL);
-	fusb302_debugfs_exit(chip);
-
-	return 0;
-}
-
-static int fusb302_pm_suspend(struct device *dev)
-{
-	struct fusb302_chip *chip = dev->driver_data;
-
-	if (atomic_read(&chip->i2c_busy))
-		return -EBUSY;
-	atomic_set(&chip->pm_suspend, 1);
-
-	return 0;
-}
-
-static int fusb302_pm_resume(struct device *dev)
-{
-	struct fusb302_chip *chip = dev->driver_data;
-
-	atomic_set(&chip->pm_suspend, 0);
-
-	return 0;
-}
-
-static const struct of_device_id fusb302_dt_match[] = {
-	{.compatible = "fcs,fusb302"},
-	{},
-};
-MODULE_DEVICE_TABLE(of, fusb302_dt_match);
-
-static const struct i2c_device_id fusb302_i2c_device_id[] = {
-	{"typec_fusb302", 0},
-	{},
-};
-MODULE_DEVICE_TABLE(i2c, fusb302_i2c_device_id);
-
-static const struct dev_pm_ops fusb302_pm_ops = {
-	.suspend = fusb302_pm_suspend,
-	.resume = fusb302_pm_resume,
-};
-
-static struct i2c_driver fusb302_driver = {
-	.driver = {
-		   .name = "typec_fusb302",
-		   .pm = &fusb302_pm_ops,
-		   .of_match_table = of_match_ptr(fusb302_dt_match),
-		   },
-	.probe = fusb302_probe,
-	.remove = fusb302_remove,
-	.id_table = fusb302_i2c_device_id,
-};
-module_i2c_driver(fusb302_driver);
-
-MODULE_AUTHOR("Yueyao Zhu <yueyao.zhu@...il.com>");
-MODULE_DESCRIPTION("Fairchild FUSB302 Type-C Chip Driver");
-MODULE_LICENSE("GPL");
diff --git a/drivers/staging/typec/fusb302/fusb302_reg.h b/drivers/staging/typec/fusb302/fusb302_reg.h
deleted file mode 100644
index 0682e63de773..000000000000
--- a/drivers/staging/typec/fusb302/fusb302_reg.h
+++ /dev/null
@@ -1,186 +0,0 @@
-/*
- * Copyright 2016-2017 Google, Inc
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * Fairchild FUSB302 Type-C Chip Driver
- */
-
-#ifndef FUSB302_REG_H
-#define FUSB302_REG_H
-
-#define FUSB_REG_DEVICE_ID			0x01
-#define FUSB_REG_SWITCHES0			0x02
-#define FUSB_REG_SWITCHES0_CC2_PU_EN		BIT(7)
-#define FUSB_REG_SWITCHES0_CC1_PU_EN		BIT(6)
-#define FUSB_REG_SWITCHES0_VCONN_CC2		BIT(5)
-#define FUSB_REG_SWITCHES0_VCONN_CC1		BIT(4)
-#define FUSB_REG_SWITCHES0_MEAS_CC2		BIT(3)
-#define FUSB_REG_SWITCHES0_MEAS_CC1		BIT(2)
-#define FUSB_REG_SWITCHES0_CC2_PD_EN		BIT(1)
-#define FUSB_REG_SWITCHES0_CC1_PD_EN		BIT(0)
-#define FUSB_REG_SWITCHES1			0x03
-#define FUSB_REG_SWITCHES1_POWERROLE		BIT(7)
-#define FUSB_REG_SWITCHES1_SPECREV1		BIT(6)
-#define FUSB_REG_SWITCHES1_SPECREV0		BIT(5)
-#define FUSB_REG_SWITCHES1_DATAROLE		BIT(4)
-#define FUSB_REG_SWITCHES1_AUTO_GCRC		BIT(2)
-#define FUSB_REG_SWITCHES1_TXCC2_EN		BIT(1)
-#define FUSB_REG_SWITCHES1_TXCC1_EN		BIT(0)
-#define FUSB_REG_MEASURE			0x04
-#define FUSB_REG_MEASURE_MDAC5			BIT(7)
-#define FUSB_REG_MEASURE_MDAC4			BIT(6)
-#define FUSB_REG_MEASURE_MDAC3			BIT(5)
-#define FUSB_REG_MEASURE_MDAC2			BIT(4)
-#define FUSB_REG_MEASURE_MDAC1			BIT(3)
-#define FUSB_REG_MEASURE_MDAC0			BIT(2)
-#define FUSB_REG_MEASURE_VBUS			BIT(1)
-#define FUSB_REG_MEASURE_XXXX5			BIT(0)
-#define FUSB_REG_CONTROL0			0x06
-#define FUSB_REG_CONTROL0_TX_FLUSH		BIT(6)
-#define FUSB_REG_CONTROL0_INT_MASK		BIT(5)
-#define FUSB_REG_CONTROL0_HOST_CUR_MASK		(0xC)
-#define FUSB_REG_CONTROL0_HOST_CUR_HIGH		(0xC)
-#define FUSB_REG_CONTROL0_HOST_CUR_MED		(0x8)
-#define FUSB_REG_CONTROL0_HOST_CUR_DEF		(0x4)
-#define FUSB_REG_CONTROL0_TX_START		BIT(0)
-#define FUSB_REG_CONTROL1			0x07
-#define FUSB_REG_CONTROL1_ENSOP2DB		BIT(6)
-#define FUSB_REG_CONTROL1_ENSOP1DB		BIT(5)
-#define FUSB_REG_CONTROL1_BIST_MODE2		BIT(4)
-#define FUSB_REG_CONTROL1_RX_FLUSH		BIT(2)
-#define FUSB_REG_CONTROL1_ENSOP2		BIT(1)
-#define FUSB_REG_CONTROL1_ENSOP1		BIT(0)
-#define FUSB_REG_CONTROL2			0x08
-#define FUSB_REG_CONTROL2_MODE			BIT(1)
-#define FUSB_REG_CONTROL2_MODE_MASK		(0x6)
-#define FUSB_REG_CONTROL2_MODE_DFP		(0x6)
-#define FUSB_REG_CONTROL2_MODE_UFP		(0x4)
-#define FUSB_REG_CONTROL2_MODE_DRP		(0x2)
-#define FUSB_REG_CONTROL2_MODE_NONE		(0x0)
-#define FUSB_REG_CONTROL2_TOGGLE		BIT(0)
-#define FUSB_REG_CONTROL3			0x09
-#define FUSB_REG_CONTROL3_SEND_HARDRESET	BIT(6)
-#define FUSB_REG_CONTROL3_BIST_TMODE		BIT(5)	/* 302B Only */
-#define FUSB_REG_CONTROL3_AUTO_HARDRESET	BIT(4)
-#define FUSB_REG_CONTROL3_AUTO_SOFTRESET	BIT(3)
-#define FUSB_REG_CONTROL3_N_RETRIES		BIT(1)
-#define FUSB_REG_CONTROL3_N_RETRIES_MASK	(0x6)
-#define FUSB_REG_CONTROL3_N_RETRIES_3		(0x6)
-#define FUSB_REG_CONTROL3_N_RETRIES_2		(0x4)
-#define FUSB_REG_CONTROL3_N_RETRIES_1		(0x2)
-#define FUSB_REG_CONTROL3_AUTO_RETRY		BIT(0)
-#define FUSB_REG_MASK				0x0A
-#define FUSB_REG_MASK_VBUSOK			BIT(7)
-#define FUSB_REG_MASK_ACTIVITY			BIT(6)
-#define FUSB_REG_MASK_COMP_CHNG			BIT(5)
-#define FUSB_REG_MASK_CRC_CHK			BIT(4)
-#define FUSB_REG_MASK_ALERT			BIT(3)
-#define FUSB_REG_MASK_WAKE			BIT(2)
-#define FUSB_REG_MASK_COLLISION			BIT(1)
-#define FUSB_REG_MASK_BC_LVL			BIT(0)
-#define FUSB_REG_POWER				0x0B
-#define FUSB_REG_POWER_PWR			BIT(0)
-#define FUSB_REG_POWER_PWR_LOW			0x1
-#define FUSB_REG_POWER_PWR_MEDIUM		0x3
-#define FUSB_REG_POWER_PWR_HIGH			0x7
-#define FUSB_REG_POWER_PWR_ALL			0xF
-#define FUSB_REG_RESET				0x0C
-#define FUSB_REG_RESET_PD_RESET			BIT(1)
-#define FUSB_REG_RESET_SW_RESET			BIT(0)
-#define FUSB_REG_MASKA				0x0E
-#define FUSB_REG_MASKA_OCP_TEMP			BIT(7)
-#define FUSB_REG_MASKA_TOGDONE			BIT(6)
-#define FUSB_REG_MASKA_SOFTFAIL			BIT(5)
-#define FUSB_REG_MASKA_RETRYFAIL		BIT(4)
-#define FUSB_REG_MASKA_HARDSENT			BIT(3)
-#define FUSB_REG_MASKA_TX_SUCCESS		BIT(2)
-#define FUSB_REG_MASKA_SOFTRESET		BIT(1)
-#define FUSB_REG_MASKA_HARDRESET		BIT(0)
-#define FUSB_REG_MASKB				0x0F
-#define FUSB_REG_MASKB_GCRCSENT			BIT(0)
-#define FUSB_REG_STATUS0A			0x3C
-#define FUSB_REG_STATUS0A_SOFTFAIL		BIT(5)
-#define FUSB_REG_STATUS0A_RETRYFAIL		BIT(4)
-#define FUSB_REG_STATUS0A_POWER			BIT(2)
-#define FUSB_REG_STATUS0A_RX_SOFT_RESET		BIT(1)
-#define FUSB_REG_STATUS0A_RX_HARD_RESET		BIT(0)
-#define FUSB_REG_STATUS1A			0x3D
-#define FUSB_REG_STATUS1A_TOGSS			BIT(3)
-#define FUSB_REG_STATUS1A_TOGSS_RUNNING		0x0
-#define FUSB_REG_STATUS1A_TOGSS_SRC1		0x1
-#define FUSB_REG_STATUS1A_TOGSS_SRC2		0x2
-#define FUSB_REG_STATUS1A_TOGSS_SNK1		0x5
-#define FUSB_REG_STATUS1A_TOGSS_SNK2		0x6
-#define FUSB_REG_STATUS1A_TOGSS_AA		0x7
-#define FUSB_REG_STATUS1A_TOGSS_POS		(3)
-#define FUSB_REG_STATUS1A_TOGSS_MASK		(0x7)
-#define FUSB_REG_STATUS1A_RXSOP2DB		BIT(2)
-#define FUSB_REG_STATUS1A_RXSOP1DB		BIT(1)
-#define FUSB_REG_STATUS1A_RXSOP			BIT(0)
-#define FUSB_REG_INTERRUPTA			0x3E
-#define FUSB_REG_INTERRUPTA_OCP_TEMP		BIT(7)
-#define FUSB_REG_INTERRUPTA_TOGDONE		BIT(6)
-#define FUSB_REG_INTERRUPTA_SOFTFAIL		BIT(5)
-#define FUSB_REG_INTERRUPTA_RETRYFAIL		BIT(4)
-#define FUSB_REG_INTERRUPTA_HARDSENT		BIT(3)
-#define FUSB_REG_INTERRUPTA_TX_SUCCESS		BIT(2)
-#define FUSB_REG_INTERRUPTA_SOFTRESET		BIT(1)
-#define FUSB_REG_INTERRUPTA_HARDRESET		BIT(0)
-#define FUSB_REG_INTERRUPTB			0x3F
-#define FUSB_REG_INTERRUPTB_GCRCSENT		BIT(0)
-#define FUSB_REG_STATUS0			0x40
-#define FUSB_REG_STATUS0_VBUSOK			BIT(7)
-#define FUSB_REG_STATUS0_ACTIVITY		BIT(6)
-#define FUSB_REG_STATUS0_COMP			BIT(5)
-#define FUSB_REG_STATUS0_CRC_CHK		BIT(4)
-#define FUSB_REG_STATUS0_ALERT			BIT(3)
-#define FUSB_REG_STATUS0_WAKE			BIT(2)
-#define FUSB_REG_STATUS0_BC_LVL_MASK		0x03
-#define FUSB_REG_STATUS0_BC_LVL_0_200		0x0
-#define FUSB_REG_STATUS0_BC_LVL_200_600		0x1
-#define FUSB_REG_STATUS0_BC_LVL_600_1230	0x2
-#define FUSB_REG_STATUS0_BC_LVL_1230_MAX	0x3
-#define FUSB_REG_STATUS0_BC_LVL1		BIT(1)
-#define FUSB_REG_STATUS0_BC_LVL0		BIT(0)
-#define FUSB_REG_STATUS1			0x41
-#define FUSB_REG_STATUS1_RXSOP2			BIT(7)
-#define FUSB_REG_STATUS1_RXSOP1			BIT(6)
-#define FUSB_REG_STATUS1_RX_EMPTY		BIT(5)
-#define FUSB_REG_STATUS1_RX_FULL		BIT(4)
-#define FUSB_REG_STATUS1_TX_EMPTY		BIT(3)
-#define FUSB_REG_STATUS1_TX_FULL		BIT(2)
-#define FUSB_REG_INTERRUPT			0x42
-#define FUSB_REG_INTERRUPT_VBUSOK		BIT(7)
-#define FUSB_REG_INTERRUPT_ACTIVITY		BIT(6)
-#define FUSB_REG_INTERRUPT_COMP_CHNG		BIT(5)
-#define FUSB_REG_INTERRUPT_CRC_CHK		BIT(4)
-#define FUSB_REG_INTERRUPT_ALERT		BIT(3)
-#define FUSB_REG_INTERRUPT_WAKE			BIT(2)
-#define FUSB_REG_INTERRUPT_COLLISION		BIT(1)
-#define FUSB_REG_INTERRUPT_BC_LVL		BIT(0)
-#define FUSB_REG_FIFOS				0x43
-
-/* Tokens defined for the FUSB302 TX FIFO */
-enum fusb302_txfifo_tokens {
-	FUSB302_TKN_TXON = 0xA1,
-	FUSB302_TKN_SYNC1 = 0x12,
-	FUSB302_TKN_SYNC2 = 0x13,
-	FUSB302_TKN_SYNC3 = 0x1B,
-	FUSB302_TKN_RST1 = 0x15,
-	FUSB302_TKN_RST2 = 0x16,
-	FUSB302_TKN_PACKSYM = 0x80,
-	FUSB302_TKN_JAMCRC = 0xFF,
-	FUSB302_TKN_EOP = 0x14,
-	FUSB302_TKN_TXOFF = 0xFE,
-};
-
-#endif
diff --git a/drivers/usb/typec/Kconfig b/drivers/usb/typec/Kconfig
index 888605860091..819c0ed2b200 100644
--- a/drivers/usb/typec/Kconfig
+++ b/drivers/usb/typec/Kconfig
@@ -12,6 +12,12 @@ config TYPEC_TCPM
 	  The Type-C Port Controller Manager provides a USB PD and USB Type-C
 	  state machine for use with Type-C Port Controllers.
 
+if TYPEC_TCPM
+
+source "drivers/usb/typec/fusb302/Kconfig"
+
+endif
+
 config TYPEC_WCOVE
 	tristate "Intel WhiskeyCove PMIC USB Type-C PHY driver"
 	depends on ACPI
diff --git a/drivers/usb/typec/Makefile b/drivers/usb/typec/Makefile
index eb883984724b..b77688ce1f16 100644
--- a/drivers/usb/typec/Makefile
+++ b/drivers/usb/typec/Makefile
@@ -1,4 +1,5 @@
 obj-$(CONFIG_TYPEC)		+= typec.o
 obj-$(CONFIG_TYPEC_TCPM)	+= tcpm.o
+obj-y				+= fusb302/
 obj-$(CONFIG_TYPEC_WCOVE)	+= typec_wcove.o
 obj-$(CONFIG_TYPEC_UCSI)	+= ucsi/
diff --git a/drivers/usb/typec/fusb302/Kconfig b/drivers/usb/typec/fusb302/Kconfig
new file mode 100644
index 000000000000..48a4f2fcee03
--- /dev/null
+++ b/drivers/usb/typec/fusb302/Kconfig
@@ -0,0 +1,7 @@
+config TYPEC_FUSB302
+	tristate "Fairchild FUSB302 Type-C chip driver"
+	depends on I2C && POWER_SUPPLY
+	help
+	  The Fairchild FUSB302 Type-C chip driver that works with
+	  Type-C Port Controller Manager to provide USB PD and USB
+	  Type-C functionalities.
diff --git a/drivers/usb/typec/fusb302/Makefile b/drivers/usb/typec/fusb302/Makefile
new file mode 100644
index 000000000000..207efa5fbab8
--- /dev/null
+++ b/drivers/usb/typec/fusb302/Makefile
@@ -0,0 +1 @@
+obj-$(CONFIG_TYPEC_FUSB302)	+= fusb302.o
diff --git a/drivers/usb/typec/fusb302/fusb302.c b/drivers/usb/typec/fusb302/fusb302.c
new file mode 100644
index 000000000000..e790b67d4953
--- /dev/null
+++ b/drivers/usb/typec/fusb302/fusb302.c
@@ -0,0 +1,1947 @@
+/*
+ * Copyright 2016-2017 Google, Inc
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * Fairchild FUSB302 Type-C Chip Driver
+ */
+
+#include <linux/debugfs.h>
+#include <linux/delay.h>
+#include <linux/errno.h>
+#include <linux/extcon.h>
+#include <linux/gpio.h>
+#include <linux/i2c.h>
+#include <linux/interrupt.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/mutex.h>
+#include <linux/of_device.h>
+#include <linux/of_device.h>
+#include <linux/of_gpio.h>
+#include <linux/pinctrl/consumer.h>
+#include <linux/power_supply.h>
+#include <linux/proc_fs.h>
+#include <linux/regulator/consumer.h>
+#include <linux/sched/clock.h>
+#include <linux/seq_file.h>
+#include <linux/slab.h>
+#include <linux/string.h>
+#include <linux/types.h>
+#include <linux/usb/typec.h>
+#include <linux/usb/tcpm.h>
+#include <linux/usb/pd.h>
+#include <linux/workqueue.h>
+
+#include "fusb302_reg.h"
+
+/*
+ * When the device is SNK, BC_LVL interrupt is used to monitor cc pins
+ * for the current capability offered by the SRC. As FUSB302 chip fires
+ * the BC_LVL interrupt on PD signalings, cc lvl should be handled after
+ * a delay to avoid measuring on PD activities. The delay is slightly
+ * longer than PD_T_PD_DEBPUNCE (10-20ms).
+ */
+#define T_BC_LVL_DEBOUNCE_DELAY_MS 30
+
+enum toggling_mode {
+	TOGGLINE_MODE_OFF,
+	TOGGLING_MODE_DRP,
+	TOGGLING_MODE_SNK,
+	TOGGLING_MODE_SRC,
+};
+
+static const char * const toggling_mode_name[] = {
+	[TOGGLINE_MODE_OFF]	= "toggling_OFF",
+	[TOGGLING_MODE_DRP]	= "toggling_DRP",
+	[TOGGLING_MODE_SNK]	= "toggling_SNK",
+	[TOGGLING_MODE_SRC]	= "toggling_SRC",
+};
+
+enum src_current_status {
+	SRC_CURRENT_DEFAULT,
+	SRC_CURRENT_MEDIUM,
+	SRC_CURRENT_HIGH,
+};
+
+static const u8 ra_mda_value[] = {
+	[SRC_CURRENT_DEFAULT] = 4,	/* 210mV */
+	[SRC_CURRENT_MEDIUM] = 9,	/* 420mV */
+	[SRC_CURRENT_HIGH] = 18,	/* 798mV */
+};
+
+static const u8 rd_mda_value[] = {
+	[SRC_CURRENT_DEFAULT] = 38,	/* 1638mV */
+	[SRC_CURRENT_MEDIUM] = 38,	/* 1638mV */
+	[SRC_CURRENT_HIGH] = 61,	/* 2604mV */
+};
+
+#define LOG_BUFFER_ENTRIES	1024
+#define LOG_BUFFER_ENTRY_SIZE	128
+
+struct fusb302_chip {
+	struct device *dev;
+	struct i2c_client *i2c_client;
+	struct tcpm_port *tcpm_port;
+	struct tcpc_dev tcpc_dev;
+	struct tcpc_config tcpc_config;
+
+	struct regulator *vbus;
+
+	int gpio_int_n;
+	int gpio_int_n_irq;
+	struct extcon_dev *extcon;
+
+	struct workqueue_struct *wq;
+	struct delayed_work bc_lvl_handler;
+
+	atomic_t pm_suspend;
+	atomic_t i2c_busy;
+
+	/* lock for sharing chip states */
+	struct mutex lock;
+
+	/* psy + psy status */
+	struct power_supply *psy;
+	u32 current_limit;
+	u32 supply_voltage;
+
+	/* chip status */
+	enum toggling_mode toggling_mode;
+	enum src_current_status src_current_status;
+	bool intr_togdone;
+	bool intr_bc_lvl;
+	bool intr_comp_chng;
+
+	/* port status */
+	bool pull_up;
+	bool vconn_on;
+	bool vbus_on;
+	bool charge_on;
+	bool vbus_present;
+	enum typec_cc_polarity cc_polarity;
+	enum typec_cc_status cc1;
+	enum typec_cc_status cc2;
+
+#ifdef CONFIG_DEBUG_FS
+	struct dentry *dentry;
+	/* lock for log buffer access */
+	struct mutex logbuffer_lock;
+	int logbuffer_head;
+	int logbuffer_tail;
+	u8 *logbuffer[LOG_BUFFER_ENTRIES];
+#endif
+};
+
+/*
+ * Logging
+ */
+
+#ifdef CONFIG_DEBUG_FS
+
+static bool fusb302_log_full(struct fusb302_chip *chip)
+{
+	return chip->logbuffer_tail ==
+		(chip->logbuffer_head + 1) % LOG_BUFFER_ENTRIES;
+}
+
+static void _fusb302_log(struct fusb302_chip *chip, const char *fmt,
+			 va_list args)
+{
+	char tmpbuffer[LOG_BUFFER_ENTRY_SIZE];
+	u64 ts_nsec = local_clock();
+	unsigned long rem_nsec;
+
+	if (!chip->logbuffer[chip->logbuffer_head]) {
+		chip->logbuffer[chip->logbuffer_head] =
+				kzalloc(LOG_BUFFER_ENTRY_SIZE, GFP_KERNEL);
+		if (!chip->logbuffer[chip->logbuffer_head])
+			return;
+	}
+
+	vsnprintf(tmpbuffer, sizeof(tmpbuffer), fmt, args);
+
+	mutex_lock(&chip->logbuffer_lock);
+
+	if (fusb302_log_full(chip)) {
+		chip->logbuffer_head = max(chip->logbuffer_head - 1, 0);
+		strlcpy(tmpbuffer, "overflow", sizeof(tmpbuffer));
+	}
+
+	if (chip->logbuffer_head < 0 ||
+	    chip->logbuffer_head >= LOG_BUFFER_ENTRIES) {
+		dev_warn(chip->dev,
+			 "Bad log buffer index %d\n", chip->logbuffer_head);
+		goto abort;
+	}
+
+	if (!chip->logbuffer[chip->logbuffer_head]) {
+		dev_warn(chip->dev,
+			 "Log buffer index %d is NULL\n", chip->logbuffer_head);
+		goto abort;
+	}
+
+	rem_nsec = do_div(ts_nsec, 1000000000);
+	scnprintf(chip->logbuffer[chip->logbuffer_head],
+		  LOG_BUFFER_ENTRY_SIZE, "[%5lu.%06lu] %s",
+		  (unsigned long)ts_nsec, rem_nsec / 1000,
+		  tmpbuffer);
+	chip->logbuffer_head = (chip->logbuffer_head + 1) % LOG_BUFFER_ENTRIES;
+
+abort:
+	mutex_unlock(&chip->logbuffer_lock);
+}
+
+static void fusb302_log(struct fusb302_chip *chip, const char *fmt, ...)
+{
+	va_list args;
+
+	va_start(args, fmt);
+	_fusb302_log(chip, fmt, args);
+	va_end(args);
+}
+
+static int fusb302_seq_show(struct seq_file *s, void *v)
+{
+	struct fusb302_chip *chip = (struct fusb302_chip *)s->private;
+	int tail;
+
+	mutex_lock(&chip->logbuffer_lock);
+	tail = chip->logbuffer_tail;
+	while (tail != chip->logbuffer_head) {
+		seq_printf(s, "%s\n", chip->logbuffer[tail]);
+		tail = (tail + 1) % LOG_BUFFER_ENTRIES;
+	}
+	if (!seq_has_overflowed(s))
+		chip->logbuffer_tail = tail;
+	mutex_unlock(&chip->logbuffer_lock);
+
+	return 0;
+}
+
+static int fusb302_debug_open(struct inode *inode, struct file *file)
+{
+	return single_open(file, fusb302_seq_show, inode->i_private);
+}
+
+static const struct file_operations fusb302_debug_operations = {
+	.open		= fusb302_debug_open,
+	.llseek		= seq_lseek,
+	.read		= seq_read,
+	.release	= single_release,
+};
+
+static struct dentry *rootdir;
+
+static int fusb302_debugfs_init(struct fusb302_chip *chip)
+{
+	mutex_init(&chip->logbuffer_lock);
+	if (!rootdir) {
+		rootdir = debugfs_create_dir("fusb302", NULL);
+		if (!rootdir)
+			return -ENOMEM;
+	}
+
+	chip->dentry = debugfs_create_file(dev_name(chip->dev),
+					   S_IFREG | 0444, rootdir,
+					   chip, &fusb302_debug_operations);
+
+	return 0;
+}
+
+static void fusb302_debugfs_exit(struct fusb302_chip *chip)
+{
+	debugfs_remove(chip->dentry);
+}
+
+#else
+
+static void fusb302_log(const struct fusb302_chip *chip,
+			const char *fmt, ...) { }
+static int fusb302_debugfs_init(const struct fusb302_chip *chip) { return 0; }
+static void fusb302_debugfs_exit(const struct fusb302_chip *chip) { }
+
+#endif
+
+#define FUSB302_RESUME_RETRY 10
+#define FUSB302_RESUME_RETRY_SLEEP 50
+
+static bool fusb302_is_suspended(struct fusb302_chip *chip)
+{
+	int retry_cnt;
+
+	for (retry_cnt = 0; retry_cnt < FUSB302_RESUME_RETRY; retry_cnt++) {
+		if (atomic_read(&chip->pm_suspend)) {
+			dev_err(chip->dev, "i2c: pm suspend, retry %d/%d\n",
+				retry_cnt + 1, FUSB302_RESUME_RETRY);
+			msleep(FUSB302_RESUME_RETRY_SLEEP);
+		} else {
+			return false;
+		}
+	}
+
+	return true;
+}
+
+static int fusb302_i2c_write(struct fusb302_chip *chip,
+			     u8 address, u8 data)
+{
+	int ret = 0;
+
+	atomic_set(&chip->i2c_busy, 1);
+
+	if (fusb302_is_suspended(chip)) {
+		atomic_set(&chip->i2c_busy, 0);
+		return -ETIMEDOUT;
+	}
+
+	ret = i2c_smbus_write_byte_data(chip->i2c_client, address, data);
+	if (ret < 0)
+		fusb302_log(chip, "cannot write 0x%02x to 0x%02x, ret=%d",
+			    data, address, ret);
+	atomic_set(&chip->i2c_busy, 0);
+
+	return ret;
+}
+
+static int fusb302_i2c_block_write(struct fusb302_chip *chip, u8 address,
+				   u8 length, const u8 *data)
+{
+	int ret = 0;
+
+	if (length <= 0)
+		return ret;
+	atomic_set(&chip->i2c_busy, 1);
+
+	if (fusb302_is_suspended(chip)) {
+		atomic_set(&chip->i2c_busy, 0);
+		return -ETIMEDOUT;
+	}
+
+	ret = i2c_smbus_write_i2c_block_data(chip->i2c_client, address,
+					     length, data);
+	if (ret < 0)
+		fusb302_log(chip, "cannot block write 0x%02x, len=%d, ret=%d",
+			    address, length, ret);
+	atomic_set(&chip->i2c_busy, 0);
+
+	return ret;
+}
+
+static int fusb302_i2c_read(struct fusb302_chip *chip,
+			    u8 address, u8 *data)
+{
+	int ret = 0;
+
+	atomic_set(&chip->i2c_busy, 1);
+
+	if (fusb302_is_suspended(chip)) {
+		atomic_set(&chip->i2c_busy, 0);
+		return -ETIMEDOUT;
+	}
+
+	ret = i2c_smbus_read_byte_data(chip->i2c_client, address);
+	*data = (u8)ret;
+	if (ret < 0)
+		fusb302_log(chip, "cannot read %02x, ret=%d", address, ret);
+	atomic_set(&chip->i2c_busy, 0);
+
+	return ret;
+}
+
+static int fusb302_i2c_block_read(struct fusb302_chip *chip, u8 address,
+				  u8 length, u8 *data)
+{
+	int ret = 0;
+
+	if (length <= 0)
+		return ret;
+	atomic_set(&chip->i2c_busy, 1);
+
+	if (fusb302_is_suspended(chip)) {
+		atomic_set(&chip->i2c_busy, 0);
+		return -ETIMEDOUT;
+	}
+
+	ret = i2c_smbus_read_i2c_block_data(chip->i2c_client, address,
+					    length, data);
+	if (ret < 0) {
+		fusb302_log(chip, "cannot block read 0x%02x, len=%d, ret=%d",
+			    address, length, ret);
+		goto done;
+	}
+	if (ret != length) {
+		fusb302_log(chip, "only read %d/%d bytes from 0x%02x",
+			    ret, length, address);
+		ret = -EIO;
+	}
+
+done:
+	atomic_set(&chip->i2c_busy, 0);
+
+	return ret;
+}
+
+static int fusb302_i2c_mask_write(struct fusb302_chip *chip, u8 address,
+				  u8 mask, u8 value)
+{
+	int ret = 0;
+	u8 data;
+
+	ret = fusb302_i2c_read(chip, address, &data);
+	if (ret < 0)
+		return ret;
+	data &= ~mask;
+	data |= value;
+	ret = fusb302_i2c_write(chip, address, data);
+	if (ret < 0)
+		return ret;
+
+	return ret;
+}
+
+static int fusb302_i2c_set_bits(struct fusb302_chip *chip, u8 address,
+				u8 set_bits)
+{
+	return fusb302_i2c_mask_write(chip, address, 0x00, set_bits);
+}
+
+static int fusb302_i2c_clear_bits(struct fusb302_chip *chip, u8 address,
+				  u8 clear_bits)
+{
+	return fusb302_i2c_mask_write(chip, address, clear_bits, 0x00);
+}
+
+static int fusb302_sw_reset(struct fusb302_chip *chip)
+{
+	int ret = 0;
+
+	ret = fusb302_i2c_write(chip, FUSB_REG_RESET,
+				FUSB_REG_RESET_SW_RESET);
+	if (ret < 0)
+		fusb302_log(chip, "cannot sw reset the chip, ret=%d", ret);
+	else
+		fusb302_log(chip, "sw reset");
+
+	return ret;
+}
+
+static int fusb302_enable_tx_auto_retries(struct fusb302_chip *chip)
+{
+	int ret = 0;
+
+	ret = fusb302_i2c_set_bits(chip, FUSB_REG_CONTROL3,
+				   FUSB_REG_CONTROL3_N_RETRIES_3 |
+				   FUSB_REG_CONTROL3_AUTO_RETRY);
+
+	return ret;
+}
+
+/*
+ * initialize interrupt on the chip
+ * - unmasked interrupt: VBUS_OK
+ */
+static int fusb302_init_interrupt(struct fusb302_chip *chip)
+{
+	int ret = 0;
+
+	ret = fusb302_i2c_write(chip, FUSB_REG_MASK,
+				0xFF & ~FUSB_REG_MASK_VBUSOK);
+	if (ret < 0)
+		return ret;
+	ret = fusb302_i2c_write(chip, FUSB_REG_MASKA, 0xFF);
+	if (ret < 0)
+		return ret;
+	ret = fusb302_i2c_write(chip, FUSB_REG_MASKB, 0xFF);
+	if (ret < 0)
+		return ret;
+	ret = fusb302_i2c_clear_bits(chip, FUSB_REG_CONTROL0,
+				     FUSB_REG_CONTROL0_INT_MASK);
+	if (ret < 0)
+		return ret;
+
+	return ret;
+}
+
+static int fusb302_set_power_mode(struct fusb302_chip *chip, u8 power_mode)
+{
+	int ret = 0;
+
+	ret = fusb302_i2c_write(chip, FUSB_REG_POWER, power_mode);
+
+	return ret;
+}
+
+static int tcpm_init(struct tcpc_dev *dev)
+{
+	struct fusb302_chip *chip = container_of(dev, struct fusb302_chip,
+						 tcpc_dev);
+	int ret = 0;
+	u8 data;
+
+	ret = fusb302_sw_reset(chip);
+	if (ret < 0)
+		return ret;
+	ret = fusb302_enable_tx_auto_retries(chip);
+	if (ret < 0)
+		return ret;
+	ret = fusb302_init_interrupt(chip);
+	if (ret < 0)
+		return ret;
+	ret = fusb302_set_power_mode(chip, FUSB_REG_POWER_PWR_ALL);
+	if (ret < 0)
+		return ret;
+	ret = fusb302_i2c_read(chip, FUSB_REG_STATUS0, &data);
+	if (ret < 0)
+		return ret;
+	chip->vbus_present = !!(data & FUSB_REG_STATUS0_VBUSOK);
+	ret = fusb302_i2c_read(chip, FUSB_REG_DEVICE_ID, &data);
+	if (ret < 0)
+		return ret;
+	fusb302_log(chip, "fusb302 device ID: 0x%02x", data);
+
+	return ret;
+}
+
+static int tcpm_get_vbus(struct tcpc_dev *dev)
+{
+	struct fusb302_chip *chip = container_of(dev, struct fusb302_chip,
+						 tcpc_dev);
+	int ret = 0;
+
+	mutex_lock(&chip->lock);
+	ret = chip->vbus_present ? 1 : 0;
+	mutex_unlock(&chip->lock);
+
+	return ret;
+}
+
+static int tcpm_get_current_limit(struct tcpc_dev *dev)
+{
+	struct fusb302_chip *chip = container_of(dev, struct fusb302_chip,
+						 tcpc_dev);
+	int current_limit = 0;
+	unsigned long timeout;
+
+	if (!chip->extcon)
+		return 0;
+
+	/*
+	 * USB2 Charger detection may still be in progress when we get here,
+	 * this can take upto 600ms, wait 800ms max.
+	 */
+	timeout = jiffies + msecs_to_jiffies(800);
+	do {
+		if (extcon_get_state(chip->extcon, EXTCON_CHG_USB_SDP) == 1)
+			current_limit = 500;
+
+		if (extcon_get_state(chip->extcon, EXTCON_CHG_USB_CDP) == 1 ||
+		    extcon_get_state(chip->extcon, EXTCON_CHG_USB_ACA) == 1)
+			current_limit = 1500;
+
+		if (extcon_get_state(chip->extcon, EXTCON_CHG_USB_DCP) == 1)
+			current_limit = 2000;
+
+		msleep(50);
+	} while (current_limit == 0 && time_before(jiffies, timeout));
+
+	return current_limit;
+}
+
+static int fusb302_set_cc_pull(struct fusb302_chip *chip,
+			       bool pull_up, bool pull_down)
+{
+	int ret = 0;
+	u8 data = 0x00;
+	u8 mask = FUSB_REG_SWITCHES0_CC1_PU_EN |
+		  FUSB_REG_SWITCHES0_CC2_PU_EN |
+		  FUSB_REG_SWITCHES0_CC1_PD_EN |
+		  FUSB_REG_SWITCHES0_CC2_PD_EN;
+
+	if (pull_up)
+		data |= (chip->cc_polarity == TYPEC_POLARITY_CC1) ?
+			FUSB_REG_SWITCHES0_CC1_PU_EN :
+			FUSB_REG_SWITCHES0_CC2_PU_EN;
+	if (pull_down)
+		data |= FUSB_REG_SWITCHES0_CC1_PD_EN |
+			FUSB_REG_SWITCHES0_CC2_PD_EN;
+	ret = fusb302_i2c_mask_write(chip, FUSB_REG_SWITCHES0,
+				     mask, data);
+	if (ret < 0)
+		return ret;
+	chip->pull_up = pull_up;
+
+	return ret;
+}
+
+static int fusb302_set_src_current(struct fusb302_chip *chip,
+				   enum src_current_status status)
+{
+	int ret = 0;
+
+	chip->src_current_status = status;
+	switch (status) {
+	case SRC_CURRENT_DEFAULT:
+		ret = fusb302_i2c_mask_write(chip, FUSB_REG_CONTROL0,
+					     FUSB_REG_CONTROL0_HOST_CUR_MASK,
+					     FUSB_REG_CONTROL0_HOST_CUR_DEF);
+		break;
+	case SRC_CURRENT_MEDIUM:
+		ret = fusb302_i2c_mask_write(chip, FUSB_REG_CONTROL0,
+					     FUSB_REG_CONTROL0_HOST_CUR_MASK,
+					     FUSB_REG_CONTROL0_HOST_CUR_MED);
+		break;
+	case SRC_CURRENT_HIGH:
+		ret = fusb302_i2c_mask_write(chip, FUSB_REG_CONTROL0,
+					     FUSB_REG_CONTROL0_HOST_CUR_MASK,
+					     FUSB_REG_CONTROL0_HOST_CUR_HIGH);
+		break;
+	default:
+		break;
+	}
+
+	return ret;
+}
+
+static int fusb302_set_toggling(struct fusb302_chip *chip,
+				enum toggling_mode mode)
+{
+	int ret = 0;
+
+	/* first disable toggling */
+	ret = fusb302_i2c_clear_bits(chip, FUSB_REG_CONTROL2,
+				     FUSB_REG_CONTROL2_TOGGLE);
+	if (ret < 0)
+		return ret;
+	/* mask interrupts for SRC or SNK */
+	ret = fusb302_i2c_set_bits(chip, FUSB_REG_MASK,
+				   FUSB_REG_MASK_BC_LVL |
+				   FUSB_REG_MASK_COMP_CHNG);
+	if (ret < 0)
+		return ret;
+	chip->intr_bc_lvl = false;
+	chip->intr_comp_chng = false;
+	/* configure toggling mode: none/snk/src/drp */
+	switch (mode) {
+	case TOGGLINE_MODE_OFF:
+		ret = fusb302_i2c_mask_write(chip, FUSB_REG_CONTROL2,
+					     FUSB_REG_CONTROL2_MODE_MASK,
+					     FUSB_REG_CONTROL2_MODE_NONE);
+		if (ret < 0)
+			return ret;
+		break;
+	case TOGGLING_MODE_SNK:
+		ret = fusb302_i2c_mask_write(chip, FUSB_REG_CONTROL2,
+					     FUSB_REG_CONTROL2_MODE_MASK,
+					     FUSB_REG_CONTROL2_MODE_UFP);
+		if (ret < 0)
+			return ret;
+		break;
+	case TOGGLING_MODE_SRC:
+		ret = fusb302_i2c_mask_write(chip, FUSB_REG_CONTROL2,
+					     FUSB_REG_CONTROL2_MODE_MASK,
+					     FUSB_REG_CONTROL2_MODE_DFP);
+		if (ret < 0)
+			return ret;
+		break;
+	case TOGGLING_MODE_DRP:
+		ret = fusb302_i2c_mask_write(chip, FUSB_REG_CONTROL2,
+					     FUSB_REG_CONTROL2_MODE_MASK,
+					     FUSB_REG_CONTROL2_MODE_DRP);
+		if (ret < 0)
+			return ret;
+		break;
+	default:
+		break;
+	}
+
+	if (mode == TOGGLINE_MODE_OFF) {
+		/* mask TOGDONE interrupt */
+		ret = fusb302_i2c_set_bits(chip, FUSB_REG_MASKA,
+					   FUSB_REG_MASKA_TOGDONE);
+		if (ret < 0)
+			return ret;
+		chip->intr_togdone = false;
+	} else {
+		/* unmask TOGDONE interrupt */
+		ret = fusb302_i2c_clear_bits(chip, FUSB_REG_MASKA,
+					     FUSB_REG_MASKA_TOGDONE);
+		if (ret < 0)
+			return ret;
+		chip->intr_togdone = true;
+		/* start toggling */
+		ret = fusb302_i2c_set_bits(chip, FUSB_REG_CONTROL2,
+					   FUSB_REG_CONTROL2_TOGGLE);
+		if (ret < 0)
+			return ret;
+		/* during toggling, consider cc as Open */
+		chip->cc1 = TYPEC_CC_OPEN;
+		chip->cc2 = TYPEC_CC_OPEN;
+	}
+	chip->toggling_mode = mode;
+
+	return ret;
+}
+
+static const char * const typec_cc_status_name[] = {
+	[TYPEC_CC_OPEN]		= "Open",
+	[TYPEC_CC_RA]		= "Ra",
+	[TYPEC_CC_RD]		= "Rd",
+	[TYPEC_CC_RP_DEF]	= "Rp-def",
+	[TYPEC_CC_RP_1_5]	= "Rp-1.5",
+	[TYPEC_CC_RP_3_0]	= "Rp-3.0",
+};
+
+static const enum src_current_status cc_src_current[] = {
+	[TYPEC_CC_OPEN]		= SRC_CURRENT_DEFAULT,
+	[TYPEC_CC_RA]		= SRC_CURRENT_DEFAULT,
+	[TYPEC_CC_RD]		= SRC_CURRENT_DEFAULT,
+	[TYPEC_CC_RP_DEF]	= SRC_CURRENT_DEFAULT,
+	[TYPEC_CC_RP_1_5]	= SRC_CURRENT_MEDIUM,
+	[TYPEC_CC_RP_3_0]	= SRC_CURRENT_HIGH,
+};
+
+static int tcpm_set_cc(struct tcpc_dev *dev, enum typec_cc_status cc)
+{
+	struct fusb302_chip *chip = container_of(dev, struct fusb302_chip,
+						 tcpc_dev);
+	int ret = 0;
+	bool pull_up, pull_down;
+	u8 rd_mda;
+
+	mutex_lock(&chip->lock);
+	switch (cc) {
+	case TYPEC_CC_OPEN:
+		pull_up = false;
+		pull_down = false;
+		break;
+	case TYPEC_CC_RD:
+		pull_up = false;
+		pull_down = true;
+		break;
+	case TYPEC_CC_RP_DEF:
+	case TYPEC_CC_RP_1_5:
+	case TYPEC_CC_RP_3_0:
+		pull_up = true;
+		pull_down = false;
+		break;
+	default:
+		fusb302_log(chip, "unsupported cc value %s",
+			    typec_cc_status_name[cc]);
+		ret = -EINVAL;
+		goto done;
+	}
+	ret = fusb302_set_toggling(chip, TOGGLINE_MODE_OFF);
+	if (ret < 0) {
+		fusb302_log(chip, "cannot stop toggling, ret=%d", ret);
+		goto done;
+	}
+	ret = fusb302_set_cc_pull(chip, pull_up, pull_down);
+	if (ret < 0) {
+		fusb302_log(chip,
+			    "cannot set cc pulling up %s, down %s, ret = %d",
+			    pull_up ? "True" : "False",
+			    pull_down ? "True" : "False",
+			    ret);
+		goto done;
+	}
+	/* reset the cc status */
+	chip->cc1 = TYPEC_CC_OPEN;
+	chip->cc2 = TYPEC_CC_OPEN;
+	/* adjust current for SRC */
+	if (pull_up) {
+		ret = fusb302_set_src_current(chip, cc_src_current[cc]);
+		if (ret < 0) {
+			fusb302_log(chip, "cannot set src current %s, ret=%d",
+				    typec_cc_status_name[cc], ret);
+			goto done;
+		}
+	}
+	/* enable/disable interrupts, BC_LVL for SNK and COMP_CHNG for SRC */
+	if (pull_up) {
+		rd_mda = rd_mda_value[cc_src_current[cc]];
+		ret = fusb302_i2c_write(chip, FUSB_REG_MEASURE, rd_mda);
+		if (ret < 0) {
+			fusb302_log(chip,
+				    "cannot set SRC measure value, ret=%d",
+				    ret);
+			goto done;
+		}
+		ret = fusb302_i2c_mask_write(chip, FUSB_REG_MASK,
+					     FUSB_REG_MASK_BC_LVL |
+					     FUSB_REG_MASK_COMP_CHNG,
+					     FUSB_REG_MASK_COMP_CHNG);
+		if (ret < 0) {
+			fusb302_log(chip, "cannot set SRC interrupt, ret=%d",
+				    ret);
+			goto done;
+		}
+		chip->intr_bc_lvl = false;
+		chip->intr_comp_chng = true;
+	}
+	if (pull_down) {
+		ret = fusb302_i2c_mask_write(chip, FUSB_REG_MASK,
+					     FUSB_REG_MASK_BC_LVL |
+					     FUSB_REG_MASK_COMP_CHNG,
+					     FUSB_REG_MASK_BC_LVL);
+		if (ret < 0) {
+			fusb302_log(chip, "cannot set SRC interrupt, ret=%d",
+				    ret);
+			goto done;
+		}
+		chip->intr_bc_lvl = true;
+		chip->intr_comp_chng = false;
+	}
+	fusb302_log(chip, "cc := %s", typec_cc_status_name[cc]);
+done:
+	mutex_unlock(&chip->lock);
+
+	return ret;
+}
+
+static int tcpm_get_cc(struct tcpc_dev *dev, enum typec_cc_status *cc1,
+		       enum typec_cc_status *cc2)
+{
+	struct fusb302_chip *chip = container_of(dev, struct fusb302_chip,
+						 tcpc_dev);
+
+	mutex_lock(&chip->lock);
+	*cc1 = chip->cc1;
+	*cc2 = chip->cc2;
+	fusb302_log(chip, "cc1=%s, cc2=%s", typec_cc_status_name[*cc1],
+		    typec_cc_status_name[*cc2]);
+	mutex_unlock(&chip->lock);
+
+	return 0;
+}
+
+static int tcpm_set_polarity(struct tcpc_dev *dev,
+			     enum typec_cc_polarity polarity)
+{
+	return 0;
+}
+
+static int tcpm_set_vconn(struct tcpc_dev *dev, bool on)
+{
+	struct fusb302_chip *chip = container_of(dev, struct fusb302_chip,
+						 tcpc_dev);
+	int ret = 0;
+	u8 switches0_data = 0x00;
+	u8 switches0_mask = FUSB_REG_SWITCHES0_VCONN_CC1 |
+			    FUSB_REG_SWITCHES0_VCONN_CC2;
+
+	mutex_lock(&chip->lock);
+	if (chip->vconn_on == on) {
+		fusb302_log(chip, "vconn is already %s", on ? "On" : "Off");
+		goto done;
+	}
+	if (on) {
+		switches0_data = (chip->cc_polarity == TYPEC_POLARITY_CC1) ?
+				 FUSB_REG_SWITCHES0_VCONN_CC2 :
+				 FUSB_REG_SWITCHES0_VCONN_CC1;
+	}
+	ret = fusb302_i2c_mask_write(chip, FUSB_REG_SWITCHES0,
+				     switches0_mask, switches0_data);
+	if (ret < 0)
+		goto done;
+	chip->vconn_on = on;
+	fusb302_log(chip, "vconn := %s", on ? "On" : "Off");
+done:
+	mutex_unlock(&chip->lock);
+
+	return ret;
+}
+
+static int tcpm_set_vbus(struct tcpc_dev *dev, bool on, bool charge)
+{
+	struct fusb302_chip *chip = container_of(dev, struct fusb302_chip,
+						 tcpc_dev);
+	int ret = 0;
+
+	mutex_lock(&chip->lock);
+	if (chip->vbus_on == on) {
+		fusb302_log(chip, "vbus is already %s", on ? "On" : "Off");
+	} else {
+		if (on)
+			ret = regulator_enable(chip->vbus);
+		else
+			ret = regulator_disable(chip->vbus);
+		if (ret < 0) {
+			fusb302_log(chip, "cannot %s vbus regulator, ret=%d",
+				    on ? "enable" : "disable", ret);
+			goto done;
+		}
+		chip->vbus_on = on;
+		fusb302_log(chip, "vbus := %s", on ? "On" : "Off");
+	}
+	if (chip->charge_on == charge) {
+		fusb302_log(chip, "charge is already %s",
+			    charge ? "On" : "Off");
+	} else {
+		chip->charge_on = charge;
+		power_supply_changed(chip->psy);
+	}
+
+done:
+	mutex_unlock(&chip->lock);
+
+	return ret;
+}
+
+static int tcpm_set_current_limit(struct tcpc_dev *dev, u32 max_ma, u32 mv)
+{
+	struct fusb302_chip *chip = container_of(dev, struct fusb302_chip,
+						 tcpc_dev);
+
+	fusb302_log(chip, "current limit: %d ma, %d mv (not implemented)",
+		    max_ma, mv);
+
+	chip->supply_voltage = mv;
+	chip->current_limit = max_ma;
+
+	power_supply_changed(chip->psy);
+
+	return 0;
+}
+
+static int fusb302_pd_tx_flush(struct fusb302_chip *chip)
+{
+	return fusb302_i2c_set_bits(chip, FUSB_REG_CONTROL0,
+				    FUSB_REG_CONTROL0_TX_FLUSH);
+}
+
+static int fusb302_pd_rx_flush(struct fusb302_chip *chip)
+{
+	return fusb302_i2c_set_bits(chip, FUSB_REG_CONTROL1,
+				    FUSB_REG_CONTROL1_RX_FLUSH);
+}
+
+static int fusb302_pd_set_auto_goodcrc(struct fusb302_chip *chip, bool on)
+{
+	if (on)
+		return fusb302_i2c_set_bits(chip, FUSB_REG_SWITCHES1,
+					    FUSB_REG_SWITCHES1_AUTO_GCRC);
+	return fusb302_i2c_clear_bits(chip, FUSB_REG_SWITCHES1,
+					    FUSB_REG_SWITCHES1_AUTO_GCRC);
+}
+
+static int fusb302_pd_set_interrupts(struct fusb302_chip *chip, bool on)
+{
+	int ret = 0;
+	u8 mask_interrupts = FUSB_REG_MASK_COLLISION;
+	u8 maska_interrupts = FUSB_REG_MASKA_RETRYFAIL |
+			      FUSB_REG_MASKA_HARDSENT |
+			      FUSB_REG_MASKA_TX_SUCCESS |
+			      FUSB_REG_MASKA_HARDRESET;
+	u8 maskb_interrupts = FUSB_REG_MASKB_GCRCSENT;
+
+	ret = on ?
+		fusb302_i2c_clear_bits(chip, FUSB_REG_MASK, mask_interrupts) :
+		fusb302_i2c_set_bits(chip, FUSB_REG_MASK, mask_interrupts);
+	if (ret < 0)
+		return ret;
+	ret = on ?
+		fusb302_i2c_clear_bits(chip, FUSB_REG_MASKA, maska_interrupts) :
+		fusb302_i2c_set_bits(chip, FUSB_REG_MASKA, maska_interrupts);
+	if (ret < 0)
+		return ret;
+	ret = on ?
+		fusb302_i2c_clear_bits(chip, FUSB_REG_MASKB, maskb_interrupts) :
+		fusb302_i2c_set_bits(chip, FUSB_REG_MASKB, maskb_interrupts);
+	return ret;
+}
+
+static int tcpm_set_pd_rx(struct tcpc_dev *dev, bool on)
+{
+	struct fusb302_chip *chip = container_of(dev, struct fusb302_chip,
+						 tcpc_dev);
+	int ret = 0;
+
+	mutex_lock(&chip->lock);
+	ret = fusb302_pd_rx_flush(chip);
+	if (ret < 0) {
+		fusb302_log(chip, "cannot flush pd rx buffer, ret=%d", ret);
+		goto done;
+	}
+	ret = fusb302_pd_tx_flush(chip);
+	if (ret < 0) {
+		fusb302_log(chip, "cannot flush pd tx buffer, ret=%d", ret);
+		goto done;
+	}
+	ret = fusb302_pd_set_auto_goodcrc(chip, on);
+	if (ret < 0) {
+		fusb302_log(chip, "cannot turn %s auto GCRC, ret=%d",
+			    on ? "on" : "off", ret);
+		goto done;
+	}
+	ret = fusb302_pd_set_interrupts(chip, on);
+	if (ret < 0) {
+		fusb302_log(chip, "cannot turn %s pd interrupts, ret=%d",
+			    on ? "on" : "off", ret);
+		goto done;
+	}
+	fusb302_log(chip, "pd := %s", on ? "on" : "off");
+done:
+	mutex_unlock(&chip->lock);
+
+	return ret;
+}
+
+static const char * const typec_role_name[] = {
+	[TYPEC_SINK]		= "Sink",
+	[TYPEC_SOURCE]		= "Source",
+};
+
+static const char * const typec_data_role_name[] = {
+	[TYPEC_DEVICE]		= "Device",
+	[TYPEC_HOST]		= "Host",
+};
+
+static int tcpm_set_roles(struct tcpc_dev *dev, bool attached,
+			  enum typec_role pwr, enum typec_data_role data)
+{
+	struct fusb302_chip *chip = container_of(dev, struct fusb302_chip,
+						 tcpc_dev);
+	int ret = 0;
+	u8 switches1_mask = FUSB_REG_SWITCHES1_POWERROLE |
+			    FUSB_REG_SWITCHES1_DATAROLE;
+	u8 switches1_data = 0x00;
+
+	mutex_lock(&chip->lock);
+	if (pwr == TYPEC_SOURCE)
+		switches1_data |= FUSB_REG_SWITCHES1_POWERROLE;
+	if (data == TYPEC_HOST)
+		switches1_data |= FUSB_REG_SWITCHES1_DATAROLE;
+	ret = fusb302_i2c_mask_write(chip, FUSB_REG_SWITCHES1,
+				     switches1_mask, switches1_data);
+	if (ret < 0) {
+		fusb302_log(chip, "unable to set pd header %s, %s, ret=%d",
+			    typec_role_name[pwr], typec_data_role_name[data],
+			    ret);
+		goto done;
+	}
+	fusb302_log(chip, "pd header := %s, %s", typec_role_name[pwr],
+		    typec_data_role_name[data]);
+done:
+	mutex_unlock(&chip->lock);
+
+	return ret;
+}
+
+static int tcpm_start_drp_toggling(struct tcpc_dev *dev,
+				   enum typec_cc_status cc)
+{
+	struct fusb302_chip *chip = container_of(dev, struct fusb302_chip,
+						 tcpc_dev);
+	int ret = 0;
+
+	mutex_lock(&chip->lock);
+	ret = fusb302_set_src_current(chip, cc_src_current[cc]);
+	if (ret < 0) {
+		fusb302_log(chip, "unable to set src current %s, ret=%d",
+			    typec_cc_status_name[cc], ret);
+		goto done;
+	}
+	ret = fusb302_set_toggling(chip, TOGGLING_MODE_DRP);
+	if (ret < 0) {
+		fusb302_log(chip,
+			    "unable to start drp toggling, ret=%d", ret);
+		goto done;
+	}
+	fusb302_log(chip, "start drp toggling");
+done:
+	mutex_unlock(&chip->lock);
+
+	return ret;
+}
+
+static int fusb302_pd_send_message(struct fusb302_chip *chip,
+				   const struct pd_message *msg)
+{
+	int ret = 0;
+	u8 buf[40];
+	u8 pos = 0;
+	int len;
+
+	/* SOP tokens */
+	buf[pos++] = FUSB302_TKN_SYNC1;
+	buf[pos++] = FUSB302_TKN_SYNC1;
+	buf[pos++] = FUSB302_TKN_SYNC1;
+	buf[pos++] = FUSB302_TKN_SYNC2;
+
+	len = pd_header_cnt_le(msg->header) * 4;
+	/* plug 2 for header */
+	len += 2;
+	if (len > 0x1F) {
+		fusb302_log(chip,
+			    "PD message too long %d (incl. header)", len);
+		return -EINVAL;
+	}
+	/* packsym tells the FUSB302 chip that the next X bytes are payload */
+	buf[pos++] = FUSB302_TKN_PACKSYM | (len & 0x1F);
+	memcpy(&buf[pos], &msg->header, sizeof(msg->header));
+	pos += sizeof(msg->header);
+
+	len -= 2;
+	memcpy(&buf[pos], msg->payload, len);
+	pos += len;
+
+	/* CRC */
+	buf[pos++] = FUSB302_TKN_JAMCRC;
+	/* EOP */
+	buf[pos++] = FUSB302_TKN_EOP;
+	/* turn tx off after sending message */
+	buf[pos++] = FUSB302_TKN_TXOFF;
+	/* start transmission */
+	buf[pos++] = FUSB302_TKN_TXON;
+
+	ret = fusb302_i2c_block_write(chip, FUSB_REG_FIFOS, pos, buf);
+	if (ret < 0)
+		return ret;
+	fusb302_log(chip, "sending PD message header: %x", msg->header);
+	fusb302_log(chip, "sending PD message len: %d", len);
+
+	return ret;
+}
+
+static int fusb302_pd_send_hardreset(struct fusb302_chip *chip)
+{
+	return fusb302_i2c_set_bits(chip, FUSB_REG_CONTROL3,
+				    FUSB_REG_CONTROL3_SEND_HARDRESET);
+}
+
+static const char * const transmit_type_name[] = {
+	[TCPC_TX_SOP]			= "SOP",
+	[TCPC_TX_SOP_PRIME]		= "SOP'",
+	[TCPC_TX_SOP_PRIME_PRIME]	= "SOP''",
+	[TCPC_TX_SOP_DEBUG_PRIME]	= "DEBUG'",
+	[TCPC_TX_SOP_DEBUG_PRIME_PRIME]	= "DEBUG''",
+	[TCPC_TX_HARD_RESET]		= "HARD_RESET",
+	[TCPC_TX_CABLE_RESET]		= "CABLE_RESET",
+	[TCPC_TX_BIST_MODE_2]		= "BIST_MODE_2",
+};
+
+static int tcpm_pd_transmit(struct tcpc_dev *dev, enum tcpm_transmit_type type,
+			    const struct pd_message *msg)
+{
+	struct fusb302_chip *chip = container_of(dev, struct fusb302_chip,
+						 tcpc_dev);
+	int ret = 0;
+
+	mutex_lock(&chip->lock);
+	switch (type) {
+	case TCPC_TX_SOP:
+		ret = fusb302_pd_send_message(chip, msg);
+		if (ret < 0)
+			fusb302_log(chip,
+				    "cannot send PD message, ret=%d", ret);
+		break;
+	case TCPC_TX_HARD_RESET:
+		ret = fusb302_pd_send_hardreset(chip);
+		if (ret < 0)
+			fusb302_log(chip,
+				    "cannot send hardreset, ret=%d", ret);
+		break;
+	default:
+		fusb302_log(chip, "type %s not supported",
+			    transmit_type_name[type]);
+		ret = -EINVAL;
+	}
+	mutex_unlock(&chip->lock);
+
+	return ret;
+}
+
+static enum typec_cc_status fusb302_bc_lvl_to_cc(u8 bc_lvl)
+{
+	if (bc_lvl == FUSB_REG_STATUS0_BC_LVL_1230_MAX)
+		return TYPEC_CC_RP_3_0;
+	if (bc_lvl == FUSB_REG_STATUS0_BC_LVL_600_1230)
+		return TYPEC_CC_RP_1_5;
+	if (bc_lvl == FUSB_REG_STATUS0_BC_LVL_200_600)
+		return TYPEC_CC_RP_DEF;
+	return TYPEC_CC_OPEN;
+}
+
+static void fusb302_bc_lvl_handler_work(struct work_struct *work)
+{
+	struct fusb302_chip *chip = container_of(work, struct fusb302_chip,
+						 bc_lvl_handler.work);
+	int ret = 0;
+	u8 status0;
+	u8 bc_lvl;
+	enum typec_cc_status cc_status;
+
+	mutex_lock(&chip->lock);
+	if (!chip->intr_bc_lvl) {
+		fusb302_log(chip, "BC_LVL interrupt is turned off, abort");
+		goto done;
+	}
+	ret = fusb302_i2c_read(chip, FUSB_REG_STATUS0, &status0);
+	if (ret < 0)
+		goto done;
+	fusb302_log(chip, "BC_LVL handler, status0=0x%02x", status0);
+	if (status0 & FUSB_REG_STATUS0_ACTIVITY) {
+		fusb302_log(chip, "CC activities detected, delay handling");
+		mod_delayed_work(chip->wq, &chip->bc_lvl_handler,
+				 msecs_to_jiffies(T_BC_LVL_DEBOUNCE_DELAY_MS));
+		goto done;
+	}
+	bc_lvl = status0 & FUSB_REG_STATUS0_BC_LVL_MASK;
+	cc_status = fusb302_bc_lvl_to_cc(bc_lvl);
+	if (chip->cc_polarity == TYPEC_POLARITY_CC1) {
+		if (chip->cc1 != cc_status) {
+			fusb302_log(chip, "cc1: %s -> %s",
+				    typec_cc_status_name[chip->cc1],
+				    typec_cc_status_name[cc_status]);
+			chip->cc1 = cc_status;
+			tcpm_cc_change(chip->tcpm_port);
+		}
+	} else {
+		if (chip->cc2 != cc_status) {
+			fusb302_log(chip, "cc2: %s -> %s",
+				    typec_cc_status_name[chip->cc2],
+				    typec_cc_status_name[cc_status]);
+			chip->cc2 = cc_status;
+			tcpm_cc_change(chip->tcpm_port);
+		}
+	}
+
+done:
+	mutex_unlock(&chip->lock);
+}
+
+#define PDO_FIXED_FLAGS \
+	(PDO_FIXED_DUAL_ROLE | PDO_FIXED_DATA_SWAP | PDO_FIXED_USB_COMM)
+
+static const u32 src_pdo[] = {
+	PDO_FIXED(5000, 400, PDO_FIXED_FLAGS),
+};
+
+static const u32 snk_pdo[] = {
+	PDO_FIXED(5000, 400, PDO_FIXED_FLAGS),
+};
+
+static const struct tcpc_config fusb302_tcpc_config = {
+	.src_pdo = src_pdo,
+	.nr_src_pdo = ARRAY_SIZE(src_pdo),
+	.snk_pdo = snk_pdo,
+	.nr_snk_pdo = ARRAY_SIZE(snk_pdo),
+	.max_snk_mv = 5000,
+	.max_snk_ma = 3000,
+	.max_snk_mw = 15000,
+	.operating_snk_mw = 2500,
+	.type = TYPEC_PORT_DRP,
+	.default_role = TYPEC_SINK,
+	.alt_modes = NULL,
+};
+
+static void init_tcpc_dev(struct tcpc_dev *fusb302_tcpc_dev)
+{
+	fusb302_tcpc_dev->init = tcpm_init;
+	fusb302_tcpc_dev->get_vbus = tcpm_get_vbus;
+	fusb302_tcpc_dev->get_current_limit = tcpm_get_current_limit;
+	fusb302_tcpc_dev->set_cc = tcpm_set_cc;
+	fusb302_tcpc_dev->get_cc = tcpm_get_cc;
+	fusb302_tcpc_dev->set_polarity = tcpm_set_polarity;
+	fusb302_tcpc_dev->set_vconn = tcpm_set_vconn;
+	fusb302_tcpc_dev->set_vbus = tcpm_set_vbus;
+	fusb302_tcpc_dev->set_current_limit = tcpm_set_current_limit;
+	fusb302_tcpc_dev->set_pd_rx = tcpm_set_pd_rx;
+	fusb302_tcpc_dev->set_roles = tcpm_set_roles;
+	fusb302_tcpc_dev->start_drp_toggling = tcpm_start_drp_toggling;
+	fusb302_tcpc_dev->pd_transmit = tcpm_pd_transmit;
+	fusb302_tcpc_dev->mux = NULL;
+}
+
+static const char * const cc_polarity_name[] = {
+	[TYPEC_POLARITY_CC1]	= "Polarity_CC1",
+	[TYPEC_POLARITY_CC2]	= "Polarity_CC2",
+};
+
+static int fusb302_set_cc_polarity(struct fusb302_chip *chip,
+				   enum typec_cc_polarity cc_polarity)
+{
+	int ret = 0;
+	u8 switches0_mask = FUSB_REG_SWITCHES0_CC1_PU_EN |
+			    FUSB_REG_SWITCHES0_CC2_PU_EN |
+			    FUSB_REG_SWITCHES0_VCONN_CC1 |
+			    FUSB_REG_SWITCHES0_VCONN_CC2 |
+			    FUSB_REG_SWITCHES0_MEAS_CC1 |
+			    FUSB_REG_SWITCHES0_MEAS_CC2;
+	u8 switches0_data = 0x00;
+	u8 switches1_mask = FUSB_REG_SWITCHES1_TXCC1_EN |
+			    FUSB_REG_SWITCHES1_TXCC2_EN;
+	u8 switches1_data = 0x00;
+
+	if (cc_polarity == TYPEC_POLARITY_CC1) {
+		switches0_data = FUSB_REG_SWITCHES0_MEAS_CC1;
+		if (chip->vconn_on)
+			switches0_data |= FUSB_REG_SWITCHES0_VCONN_CC2;
+		if (chip->pull_up)
+			switches0_data |= FUSB_REG_SWITCHES0_CC1_PU_EN;
+		switches1_data = FUSB_REG_SWITCHES1_TXCC1_EN;
+	} else {
+		switches0_data = FUSB_REG_SWITCHES0_MEAS_CC2;
+		if (chip->vconn_on)
+			switches0_data |= FUSB_REG_SWITCHES0_VCONN_CC1;
+		if (chip->pull_up)
+			switches0_data |= FUSB_REG_SWITCHES0_CC2_PU_EN;
+		switches1_data = FUSB_REG_SWITCHES1_TXCC2_EN;
+	}
+	ret = fusb302_i2c_mask_write(chip, FUSB_REG_SWITCHES0,
+				     switches0_mask, switches0_data);
+	if (ret < 0)
+		return ret;
+	ret = fusb302_i2c_mask_write(chip, FUSB_REG_SWITCHES1,
+				     switches1_mask, switches1_data);
+	if (ret < 0)
+		return ret;
+	chip->cc_polarity = cc_polarity;
+
+	return ret;
+}
+
+static int fusb302_handle_togdone_snk(struct fusb302_chip *chip,
+				      u8 togdone_result)
+{
+	int ret = 0;
+	u8 status0;
+	u8 bc_lvl;
+	enum typec_cc_polarity cc_polarity;
+	enum typec_cc_status cc_status_active, cc1, cc2;
+
+	/* set pull_up, pull_down */
+	ret = fusb302_set_cc_pull(chip, false, true);
+	if (ret < 0) {
+		fusb302_log(chip, "cannot set cc to pull down, ret=%d", ret);
+		return ret;
+	}
+	/* set polarity */
+	cc_polarity = (togdone_result == FUSB_REG_STATUS1A_TOGSS_SNK1) ?
+		      TYPEC_POLARITY_CC1 : TYPEC_POLARITY_CC2;
+	ret = fusb302_set_cc_polarity(chip, cc_polarity);
+	if (ret < 0) {
+		fusb302_log(chip, "cannot set cc polarity %s, ret=%d",
+			    cc_polarity_name[cc_polarity], ret);
+		return ret;
+	}
+	/* fusb302_set_cc_polarity() has set the correct measure block */
+	ret = fusb302_i2c_read(chip, FUSB_REG_STATUS0, &status0);
+	if (ret < 0)
+		return ret;
+	bc_lvl = status0 & FUSB_REG_STATUS0_BC_LVL_MASK;
+	cc_status_active = fusb302_bc_lvl_to_cc(bc_lvl);
+	/* restart toggling if the cc status on the active line is OPEN */
+	if (cc_status_active == TYPEC_CC_OPEN) {
+		fusb302_log(chip, "restart toggling as CC_OPEN detected");
+		ret = fusb302_set_toggling(chip, chip->toggling_mode);
+		return ret;
+	}
+	/* update tcpm with the new cc value */
+	cc1 = (cc_polarity == TYPEC_POLARITY_CC1) ?
+	      cc_status_active : TYPEC_CC_OPEN;
+	cc2 = (cc_polarity == TYPEC_POLARITY_CC2) ?
+	      cc_status_active : TYPEC_CC_OPEN;
+	if ((chip->cc1 != cc1) || (chip->cc2 != cc2)) {
+		chip->cc1 = cc1;
+		chip->cc2 = cc2;
+		tcpm_cc_change(chip->tcpm_port);
+	}
+	/* turn off toggling */
+	ret = fusb302_set_toggling(chip, TOGGLINE_MODE_OFF);
+	if (ret < 0) {
+		fusb302_log(chip,
+			    "cannot set toggling mode off, ret=%d", ret);
+		return ret;
+	}
+	/* unmask bc_lvl interrupt */
+	ret = fusb302_i2c_clear_bits(chip, FUSB_REG_MASK, FUSB_REG_MASK_BC_LVL);
+	if (ret < 0) {
+		fusb302_log(chip,
+			    "cannot unmask bc_lcl interrupt, ret=%d", ret);
+		return ret;
+	}
+	chip->intr_bc_lvl = true;
+	fusb302_log(chip, "detected cc1=%s, cc2=%s",
+		    typec_cc_status_name[cc1],
+		    typec_cc_status_name[cc2]);
+
+	return ret;
+}
+
+static int fusb302_handle_togdone_src(struct fusb302_chip *chip,
+				      u8 togdone_result)
+{
+	/*
+	 * - set polarity (measure cc, vconn, tx)
+	 * - set pull_up, pull_down
+	 * - set cc1, cc2, and update to tcpm_port
+	 * - set I_COMP interrupt on
+	 */
+	int ret = 0;
+	u8 status0;
+	u8 ra_mda = ra_mda_value[chip->src_current_status];
+	u8 rd_mda = rd_mda_value[chip->src_current_status];
+	bool ra_comp, rd_comp;
+	enum typec_cc_polarity cc_polarity;
+	enum typec_cc_status cc_status_active, cc1, cc2;
+
+	/* set pull_up, pull_down */
+	ret = fusb302_set_cc_pull(chip, true, false);
+	if (ret < 0) {
+		fusb302_log(chip, "cannot set cc to pull up, ret=%d", ret);
+		return ret;
+	}
+	/* set polarity */
+	cc_polarity = (togdone_result == FUSB_REG_STATUS1A_TOGSS_SRC1) ?
+		      TYPEC_POLARITY_CC1 : TYPEC_POLARITY_CC2;
+	ret = fusb302_set_cc_polarity(chip, cc_polarity);
+	if (ret < 0) {
+		fusb302_log(chip, "cannot set cc polarity %s, ret=%d",
+			    cc_polarity_name[cc_polarity], ret);
+		return ret;
+	}
+	/* fusb302_set_cc_polarity() has set the correct measure block */
+	ret = fusb302_i2c_write(chip, FUSB_REG_MEASURE, rd_mda);
+	if (ret < 0)
+		return ret;
+	usleep_range(50, 100);
+	ret = fusb302_i2c_read(chip, FUSB_REG_STATUS0, &status0);
+	if (ret < 0)
+		return ret;
+	rd_comp = !!(status0 & FUSB_REG_STATUS0_COMP);
+	if (!rd_comp) {
+		ret = fusb302_i2c_write(chip, FUSB_REG_MEASURE, ra_mda);
+		if (ret < 0)
+			return ret;
+		usleep_range(50, 100);
+		ret = fusb302_i2c_read(chip, FUSB_REG_STATUS0, &status0);
+		if (ret < 0)
+			return ret;
+		ra_comp = !!(status0 & FUSB_REG_STATUS0_COMP);
+	}
+	if (rd_comp)
+		cc_status_active = TYPEC_CC_OPEN;
+	else if (ra_comp)
+		cc_status_active = TYPEC_CC_RD;
+	else
+		/* Ra is not supported, report as Open */
+		cc_status_active = TYPEC_CC_OPEN;
+	/* restart toggling if the cc status on the active line is OPEN */
+	if (cc_status_active == TYPEC_CC_OPEN) {
+		fusb302_log(chip, "restart toggling as CC_OPEN detected");
+		ret = fusb302_set_toggling(chip, chip->toggling_mode);
+		return ret;
+	}
+	/* update tcpm with the new cc value */
+	cc1 = (cc_polarity == TYPEC_POLARITY_CC1) ?
+	      cc_status_active : TYPEC_CC_OPEN;
+	cc2 = (cc_polarity == TYPEC_POLARITY_CC2) ?
+	      cc_status_active : TYPEC_CC_OPEN;
+	if ((chip->cc1 != cc1) || (chip->cc2 != cc2)) {
+		chip->cc1 = cc1;
+		chip->cc2 = cc2;
+		tcpm_cc_change(chip->tcpm_port);
+	}
+	/* turn off toggling */
+	ret = fusb302_set_toggling(chip, TOGGLINE_MODE_OFF);
+	if (ret < 0) {
+		fusb302_log(chip,
+			    "cannot set toggling mode off, ret=%d", ret);
+		return ret;
+	}
+	/* set MDAC to Rd threshold, and unmask I_COMP for unplug detection */
+	ret = fusb302_i2c_write(chip, FUSB_REG_MEASURE, rd_mda);
+	if (ret < 0)
+		return ret;
+	/* unmask comp_chng interrupt */
+	ret = fusb302_i2c_clear_bits(chip, FUSB_REG_MASK,
+				     FUSB_REG_MASK_COMP_CHNG);
+	if (ret < 0) {
+		fusb302_log(chip,
+			    "cannot unmask bc_lcl interrupt, ret=%d", ret);
+		return ret;
+	}
+	chip->intr_comp_chng = true;
+	fusb302_log(chip, "detected cc1=%s, cc2=%s",
+		    typec_cc_status_name[cc1],
+		    typec_cc_status_name[cc2]);
+
+	return ret;
+}
+
+static int fusb302_handle_togdone(struct fusb302_chip *chip)
+{
+	int ret = 0;
+	u8 status1a;
+	u8 togdone_result;
+
+	ret = fusb302_i2c_read(chip, FUSB_REG_STATUS1A, &status1a);
+	if (ret < 0)
+		return ret;
+	togdone_result = (status1a >> FUSB_REG_STATUS1A_TOGSS_POS) &
+			 FUSB_REG_STATUS1A_TOGSS_MASK;
+	switch (togdone_result) {
+	case FUSB_REG_STATUS1A_TOGSS_SNK1:
+	case FUSB_REG_STATUS1A_TOGSS_SNK2:
+		return fusb302_handle_togdone_snk(chip, togdone_result);
+	case FUSB_REG_STATUS1A_TOGSS_SRC1:
+	case FUSB_REG_STATUS1A_TOGSS_SRC2:
+		return fusb302_handle_togdone_src(chip, togdone_result);
+	case FUSB_REG_STATUS1A_TOGSS_AA:
+		/* doesn't support */
+		fusb302_log(chip, "AudioAccessory not supported");
+		fusb302_set_toggling(chip, chip->toggling_mode);
+		break;
+	default:
+		fusb302_log(chip, "TOGDONE with an invalid state: %d",
+			    togdone_result);
+		fusb302_set_toggling(chip, chip->toggling_mode);
+		break;
+	}
+	return ret;
+}
+
+static int fusb302_pd_reset(struct fusb302_chip *chip)
+{
+	return fusb302_i2c_set_bits(chip, FUSB_REG_RESET,
+				    FUSB_REG_RESET_PD_RESET);
+}
+
+static int fusb302_pd_read_message(struct fusb302_chip *chip,
+				   struct pd_message *msg)
+{
+	int ret = 0;
+	u8 token;
+	u8 crc[4];
+	int len;
+
+	/* first SOP token */
+	ret = fusb302_i2c_read(chip, FUSB_REG_FIFOS, &token);
+	if (ret < 0)
+		return ret;
+	ret = fusb302_i2c_block_read(chip, FUSB_REG_FIFOS, 2,
+				     (u8 *)&msg->header);
+	if (ret < 0)
+		return ret;
+	len = pd_header_cnt_le(msg->header) * 4;
+	/* add 4 to length to include the CRC */
+	if (len > PD_MAX_PAYLOAD * 4) {
+		fusb302_log(chip, "PD message too long %d", len);
+		return -EINVAL;
+	}
+	if (len > 0) {
+		ret = fusb302_i2c_block_read(chip, FUSB_REG_FIFOS, len,
+					     (u8 *)msg->payload);
+		if (ret < 0)
+			return ret;
+	}
+	/* another 4 bytes to read CRC out */
+	ret = fusb302_i2c_block_read(chip, FUSB_REG_FIFOS, 4, crc);
+	if (ret < 0)
+		return ret;
+	fusb302_log(chip, "PD message header: %x", msg->header);
+	fusb302_log(chip, "PD message len: %d", len);
+
+	return ret;
+}
+
+static irqreturn_t fusb302_irq_intn(int irq, void *dev_id)
+{
+	struct fusb302_chip *chip = dev_id;
+	int ret = 0;
+	u8 interrupt;
+	u8 interrupta;
+	u8 interruptb;
+	u8 status0;
+	bool vbus_present;
+	bool comp_result;
+	bool intr_togdone;
+	bool intr_bc_lvl;
+	bool intr_comp_chng;
+	struct pd_message pd_msg;
+
+	mutex_lock(&chip->lock);
+	/* grab a snapshot of intr flags */
+	intr_togdone = chip->intr_togdone;
+	intr_bc_lvl = chip->intr_bc_lvl;
+	intr_comp_chng = chip->intr_comp_chng;
+
+	ret = fusb302_i2c_read(chip, FUSB_REG_INTERRUPT, &interrupt);
+	if (ret < 0)
+		goto done;
+	ret = fusb302_i2c_read(chip, FUSB_REG_INTERRUPTA, &interrupta);
+	if (ret < 0)
+		goto done;
+	ret = fusb302_i2c_read(chip, FUSB_REG_INTERRUPTB, &interruptb);
+	if (ret < 0)
+		goto done;
+	ret = fusb302_i2c_read(chip, FUSB_REG_STATUS0, &status0);
+	if (ret < 0)
+		goto done;
+	fusb302_log(chip,
+		    "IRQ: 0x%02x, a: 0x%02x, b: 0x%02x, status0: 0x%02x",
+		    interrupt, interrupta, interruptb, status0);
+
+	if (interrupt & FUSB_REG_INTERRUPT_VBUSOK) {
+		vbus_present = !!(status0 & FUSB_REG_STATUS0_VBUSOK);
+		fusb302_log(chip, "IRQ: VBUS_OK, vbus=%s",
+			    vbus_present ? "On" : "Off");
+		if (vbus_present != chip->vbus_present) {
+			chip->vbus_present = vbus_present;
+			tcpm_vbus_change(chip->tcpm_port);
+		}
+	}
+
+	if ((interrupta & FUSB_REG_INTERRUPTA_TOGDONE) && intr_togdone) {
+		fusb302_log(chip, "IRQ: TOGDONE");
+		ret = fusb302_handle_togdone(chip);
+		if (ret < 0) {
+			fusb302_log(chip,
+				    "handle togdone error, ret=%d", ret);
+			goto done;
+		}
+	}
+
+	if ((interrupt & FUSB_REG_INTERRUPT_BC_LVL) && intr_bc_lvl) {
+		fusb302_log(chip, "IRQ: BC_LVL, handler pending");
+		/*
+		 * as BC_LVL interrupt can be affected by PD activity,
+		 * apply delay to for the handler to wait for the PD
+		 * signaling to finish.
+		 */
+		mod_delayed_work(chip->wq, &chip->bc_lvl_handler,
+				 msecs_to_jiffies(T_BC_LVL_DEBOUNCE_DELAY_MS));
+	}
+
+	if ((interrupt & FUSB_REG_INTERRUPT_COMP_CHNG) && intr_comp_chng) {
+		comp_result = !!(status0 & FUSB_REG_STATUS0_COMP);
+		fusb302_log(chip, "IRQ: COMP_CHNG, comp=%s",
+			    comp_result ? "true" : "false");
+		if (comp_result) {
+			/* cc level > Rd_threashold, detach */
+			if (chip->cc_polarity == TYPEC_POLARITY_CC1)
+				chip->cc1 = TYPEC_CC_OPEN;
+			else
+				chip->cc2 = TYPEC_CC_OPEN;
+			tcpm_cc_change(chip->tcpm_port);
+		}
+	}
+
+	if (interrupt & FUSB_REG_INTERRUPT_COLLISION) {
+		fusb302_log(chip, "IRQ: PD collision");
+		tcpm_pd_transmit_complete(chip->tcpm_port, TCPC_TX_FAILED);
+	}
+
+	if (interrupta & FUSB_REG_INTERRUPTA_RETRYFAIL) {
+		fusb302_log(chip, "IRQ: PD retry failed");
+		tcpm_pd_transmit_complete(chip->tcpm_port, TCPC_TX_FAILED);
+	}
+
+	if (interrupta & FUSB_REG_INTERRUPTA_HARDSENT) {
+		fusb302_log(chip, "IRQ: PD hardreset sent");
+		ret = fusb302_pd_reset(chip);
+		if (ret < 0) {
+			fusb302_log(chip, "cannot PD reset, ret=%d", ret);
+			goto done;
+		}
+		tcpm_pd_transmit_complete(chip->tcpm_port, TCPC_TX_SUCCESS);
+	}
+
+	if (interrupta & FUSB_REG_INTERRUPTA_TX_SUCCESS) {
+		fusb302_log(chip, "IRQ: PD tx success");
+		/* read out the received good CRC */
+		ret = fusb302_pd_read_message(chip, &pd_msg);
+		if (ret < 0) {
+			fusb302_log(chip, "cannot read in GCRC, ret=%d", ret);
+			goto done;
+		}
+		tcpm_pd_transmit_complete(chip->tcpm_port, TCPC_TX_SUCCESS);
+	}
+
+	if (interrupta & FUSB_REG_INTERRUPTA_HARDRESET) {
+		fusb302_log(chip, "IRQ: PD received hardreset");
+		ret = fusb302_pd_reset(chip);
+		if (ret < 0) {
+			fusb302_log(chip, "cannot PD reset, ret=%d", ret);
+			goto done;
+		}
+		tcpm_pd_hard_reset(chip->tcpm_port);
+	}
+
+	if (interruptb & FUSB_REG_INTERRUPTB_GCRCSENT) {
+		fusb302_log(chip, "IRQ: PD sent good CRC");
+		ret = fusb302_pd_read_message(chip, &pd_msg);
+		if (ret < 0) {
+			fusb302_log(chip,
+				    "cannot read in PD message, ret=%d", ret);
+			goto done;
+		}
+		tcpm_pd_receive(chip->tcpm_port, &pd_msg);
+	}
+done:
+	mutex_unlock(&chip->lock);
+
+	return IRQ_HANDLED;
+}
+
+static int fusb302_psy_get_property(struct power_supply *psy,
+				    enum power_supply_property psp,
+				    union power_supply_propval *val)
+{
+	struct fusb302_chip *chip = power_supply_get_drvdata(psy);
+
+	switch (psp) {
+	case POWER_SUPPLY_PROP_ONLINE:
+		val->intval = chip->charge_on;
+		break;
+	case POWER_SUPPLY_PROP_VOLTAGE_NOW:
+		val->intval = chip->supply_voltage * 1000; /* mV -> µV */
+		break;
+	case POWER_SUPPLY_PROP_CURRENT_MAX:
+		val->intval = chip->current_limit * 1000; /* mA -> µA */
+		break;
+	default:
+		return -ENODATA;
+	}
+
+	return 0;
+}
+
+static enum power_supply_property fusb302_psy_properties[] = {
+	POWER_SUPPLY_PROP_ONLINE,
+	POWER_SUPPLY_PROP_VOLTAGE_NOW,
+	POWER_SUPPLY_PROP_CURRENT_MAX,
+};
+
+static const struct power_supply_desc fusb302_psy_desc = {
+	.name		= "fusb302-typec-source",
+	.type		= POWER_SUPPLY_TYPE_USB_TYPE_C,
+	.properties	= fusb302_psy_properties,
+	.num_properties	= ARRAY_SIZE(fusb302_psy_properties),
+	.get_property	= fusb302_psy_get_property,
+};
+
+static int init_gpio(struct fusb302_chip *chip)
+{
+	struct device_node *node;
+	int ret = 0;
+
+	node = chip->dev->of_node;
+	chip->gpio_int_n = of_get_named_gpio(node, "fcs,int_n", 0);
+	if (!gpio_is_valid(chip->gpio_int_n)) {
+		ret = chip->gpio_int_n;
+		fusb302_log(chip, "cannot get named GPIO Int_N, ret=%d", ret);
+		return ret;
+	}
+	ret = devm_gpio_request(chip->dev, chip->gpio_int_n, "fcs,int_n");
+	if (ret < 0) {
+		fusb302_log(chip, "cannot request GPIO Int_N, ret=%d", ret);
+		return ret;
+	}
+	ret = gpio_direction_input(chip->gpio_int_n);
+	if (ret < 0) {
+		fusb302_log(chip,
+			    "cannot set GPIO Int_N to input, ret=%d", ret);
+		return ret;
+	}
+	ret = gpio_to_irq(chip->gpio_int_n);
+	if (ret < 0) {
+		fusb302_log(chip,
+			    "cannot request IRQ for GPIO Int_N, ret=%d", ret);
+		return ret;
+	}
+	chip->gpio_int_n_irq = ret;
+	return 0;
+}
+
+static int fusb302_probe(struct i2c_client *client,
+			 const struct i2c_device_id *id)
+{
+	struct fusb302_chip *chip;
+	struct i2c_adapter *adapter;
+	struct device *dev = &client->dev;
+	struct power_supply_config cfg = {};
+	const char *name;
+	int ret = 0;
+	u32 v;
+
+	adapter = to_i2c_adapter(client->dev.parent);
+	if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_I2C_BLOCK)) {
+		dev_err(&client->dev,
+			"I2C/SMBus block functionality not supported!\n");
+		return -ENODEV;
+	}
+	chip = devm_kzalloc(&client->dev, sizeof(*chip), GFP_KERNEL);
+	if (!chip)
+		return -ENOMEM;
+
+	chip->i2c_client = client;
+	i2c_set_clientdata(client, chip);
+	chip->dev = &client->dev;
+	chip->tcpc_config = fusb302_tcpc_config;
+	chip->tcpc_dev.config = &chip->tcpc_config;
+	mutex_init(&chip->lock);
+
+	if (!device_property_read_u32(dev, "fcs,max-sink-microvolt", &v))
+		chip->tcpc_config.max_snk_mv = v / 1000;
+
+	if (!device_property_read_u32(dev, "fcs,max-sink-microamp", &v))
+		chip->tcpc_config.max_snk_ma = v / 1000;
+
+	if (!device_property_read_u32(dev, "fcs,max-sink-microwatt", &v))
+		chip->tcpc_config.max_snk_mw = v / 1000;
+
+	if (!device_property_read_u32(dev, "fcs,operating-sink-microwatt", &v))
+		chip->tcpc_config.operating_snk_mw = v / 1000;
+
+	/*
+	 * Devicetree platforms should get extcon via phandle (not yet
+	 * supported). On ACPI platforms, we get the name from a device prop.
+	 * This device prop is for kernel internal use only and is expected
+	 * to be set by the platform code which also registers the i2c client
+	 * for the fusb302.
+	 */
+	if (device_property_read_string(dev, "fcs,extcon-name", &name) == 0) {
+		chip->extcon = extcon_get_extcon_dev(name);
+		if (!chip->extcon)
+			return -EPROBE_DEFER;
+	}
+
+	cfg.drv_data = chip;
+	chip->psy = devm_power_supply_register(dev, &fusb302_psy_desc, &cfg);
+	if (IS_ERR(chip->psy)) {
+		ret = PTR_ERR(chip->psy);
+		dev_err(chip->dev, "Error registering power-supply: %d\n", ret);
+		return ret;
+	}
+
+	ret = fusb302_debugfs_init(chip);
+	if (ret < 0)
+		return ret;
+
+	chip->wq = create_singlethread_workqueue(dev_name(chip->dev));
+	if (!chip->wq) {
+		ret = -ENOMEM;
+		goto clear_client_data;
+	}
+	INIT_DELAYED_WORK(&chip->bc_lvl_handler, fusb302_bc_lvl_handler_work);
+	init_tcpc_dev(&chip->tcpc_dev);
+
+	chip->vbus = devm_regulator_get(chip->dev, "vbus");
+	if (IS_ERR(chip->vbus)) {
+		ret = PTR_ERR(chip->vbus);
+		goto destroy_workqueue;
+	}
+
+	if (client->irq) {
+		chip->gpio_int_n_irq = client->irq;
+	} else {
+		ret = init_gpio(chip);
+		if (ret < 0)
+			goto destroy_workqueue;
+	}
+
+	chip->tcpm_port = tcpm_register_port(&client->dev, &chip->tcpc_dev);
+	if (IS_ERR(chip->tcpm_port)) {
+		ret = PTR_ERR(chip->tcpm_port);
+		fusb302_log(chip, "cannot register tcpm port, ret=%d", ret);
+		goto destroy_workqueue;
+	}
+
+	ret = devm_request_threaded_irq(chip->dev, chip->gpio_int_n_irq,
+					NULL, fusb302_irq_intn,
+					IRQF_ONESHOT | IRQF_TRIGGER_LOW,
+					"fsc_interrupt_int_n", chip);
+	if (ret < 0) {
+		fusb302_log(chip,
+			    "cannot request IRQ for GPIO Int_N, ret=%d", ret);
+		goto tcpm_unregister_port;
+	}
+	enable_irq_wake(chip->gpio_int_n_irq);
+	return ret;
+
+tcpm_unregister_port:
+	tcpm_unregister_port(chip->tcpm_port);
+destroy_workqueue:
+	destroy_workqueue(chip->wq);
+clear_client_data:
+	i2c_set_clientdata(client, NULL);
+	fusb302_debugfs_exit(chip);
+
+	return ret;
+}
+
+static int fusb302_remove(struct i2c_client *client)
+{
+	struct fusb302_chip *chip = i2c_get_clientdata(client);
+
+	tcpm_unregister_port(chip->tcpm_port);
+	destroy_workqueue(chip->wq);
+	i2c_set_clientdata(client, NULL);
+	fusb302_debugfs_exit(chip);
+
+	return 0;
+}
+
+static int fusb302_pm_suspend(struct device *dev)
+{
+	struct fusb302_chip *chip = dev->driver_data;
+
+	if (atomic_read(&chip->i2c_busy))
+		return -EBUSY;
+	atomic_set(&chip->pm_suspend, 1);
+
+	return 0;
+}
+
+static int fusb302_pm_resume(struct device *dev)
+{
+	struct fusb302_chip *chip = dev->driver_data;
+
+	atomic_set(&chip->pm_suspend, 0);
+
+	return 0;
+}
+
+static const struct of_device_id fusb302_dt_match[] = {
+	{.compatible = "fcs,fusb302"},
+	{},
+};
+MODULE_DEVICE_TABLE(of, fusb302_dt_match);
+
+static const struct i2c_device_id fusb302_i2c_device_id[] = {
+	{"typec_fusb302", 0},
+	{},
+};
+MODULE_DEVICE_TABLE(i2c, fusb302_i2c_device_id);
+
+static const struct dev_pm_ops fusb302_pm_ops = {
+	.suspend = fusb302_pm_suspend,
+	.resume = fusb302_pm_resume,
+};
+
+static struct i2c_driver fusb302_driver = {
+	.driver = {
+		   .name = "typec_fusb302",
+		   .pm = &fusb302_pm_ops,
+		   .of_match_table = of_match_ptr(fusb302_dt_match),
+		   },
+	.probe = fusb302_probe,
+	.remove = fusb302_remove,
+	.id_table = fusb302_i2c_device_id,
+};
+module_i2c_driver(fusb302_driver);
+
+MODULE_AUTHOR("Yueyao Zhu <yueyao.zhu@...il.com>");
+MODULE_DESCRIPTION("Fairchild FUSB302 Type-C Chip Driver");
+MODULE_LICENSE("GPL");
diff --git a/drivers/usb/typec/fusb302/fusb302_reg.h b/drivers/usb/typec/fusb302/fusb302_reg.h
new file mode 100644
index 000000000000..0682e63de773
--- /dev/null
+++ b/drivers/usb/typec/fusb302/fusb302_reg.h
@@ -0,0 +1,186 @@
+/*
+ * Copyright 2016-2017 Google, Inc
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * Fairchild FUSB302 Type-C Chip Driver
+ */
+
+#ifndef FUSB302_REG_H
+#define FUSB302_REG_H
+
+#define FUSB_REG_DEVICE_ID			0x01
+#define FUSB_REG_SWITCHES0			0x02
+#define FUSB_REG_SWITCHES0_CC2_PU_EN		BIT(7)
+#define FUSB_REG_SWITCHES0_CC1_PU_EN		BIT(6)
+#define FUSB_REG_SWITCHES0_VCONN_CC2		BIT(5)
+#define FUSB_REG_SWITCHES0_VCONN_CC1		BIT(4)
+#define FUSB_REG_SWITCHES0_MEAS_CC2		BIT(3)
+#define FUSB_REG_SWITCHES0_MEAS_CC1		BIT(2)
+#define FUSB_REG_SWITCHES0_CC2_PD_EN		BIT(1)
+#define FUSB_REG_SWITCHES0_CC1_PD_EN		BIT(0)
+#define FUSB_REG_SWITCHES1			0x03
+#define FUSB_REG_SWITCHES1_POWERROLE		BIT(7)
+#define FUSB_REG_SWITCHES1_SPECREV1		BIT(6)
+#define FUSB_REG_SWITCHES1_SPECREV0		BIT(5)
+#define FUSB_REG_SWITCHES1_DATAROLE		BIT(4)
+#define FUSB_REG_SWITCHES1_AUTO_GCRC		BIT(2)
+#define FUSB_REG_SWITCHES1_TXCC2_EN		BIT(1)
+#define FUSB_REG_SWITCHES1_TXCC1_EN		BIT(0)
+#define FUSB_REG_MEASURE			0x04
+#define FUSB_REG_MEASURE_MDAC5			BIT(7)
+#define FUSB_REG_MEASURE_MDAC4			BIT(6)
+#define FUSB_REG_MEASURE_MDAC3			BIT(5)
+#define FUSB_REG_MEASURE_MDAC2			BIT(4)
+#define FUSB_REG_MEASURE_MDAC1			BIT(3)
+#define FUSB_REG_MEASURE_MDAC0			BIT(2)
+#define FUSB_REG_MEASURE_VBUS			BIT(1)
+#define FUSB_REG_MEASURE_XXXX5			BIT(0)
+#define FUSB_REG_CONTROL0			0x06
+#define FUSB_REG_CONTROL0_TX_FLUSH		BIT(6)
+#define FUSB_REG_CONTROL0_INT_MASK		BIT(5)
+#define FUSB_REG_CONTROL0_HOST_CUR_MASK		(0xC)
+#define FUSB_REG_CONTROL0_HOST_CUR_HIGH		(0xC)
+#define FUSB_REG_CONTROL0_HOST_CUR_MED		(0x8)
+#define FUSB_REG_CONTROL0_HOST_CUR_DEF		(0x4)
+#define FUSB_REG_CONTROL0_TX_START		BIT(0)
+#define FUSB_REG_CONTROL1			0x07
+#define FUSB_REG_CONTROL1_ENSOP2DB		BIT(6)
+#define FUSB_REG_CONTROL1_ENSOP1DB		BIT(5)
+#define FUSB_REG_CONTROL1_BIST_MODE2		BIT(4)
+#define FUSB_REG_CONTROL1_RX_FLUSH		BIT(2)
+#define FUSB_REG_CONTROL1_ENSOP2		BIT(1)
+#define FUSB_REG_CONTROL1_ENSOP1		BIT(0)
+#define FUSB_REG_CONTROL2			0x08
+#define FUSB_REG_CONTROL2_MODE			BIT(1)
+#define FUSB_REG_CONTROL2_MODE_MASK		(0x6)
+#define FUSB_REG_CONTROL2_MODE_DFP		(0x6)
+#define FUSB_REG_CONTROL2_MODE_UFP		(0x4)
+#define FUSB_REG_CONTROL2_MODE_DRP		(0x2)
+#define FUSB_REG_CONTROL2_MODE_NONE		(0x0)
+#define FUSB_REG_CONTROL2_TOGGLE		BIT(0)
+#define FUSB_REG_CONTROL3			0x09
+#define FUSB_REG_CONTROL3_SEND_HARDRESET	BIT(6)
+#define FUSB_REG_CONTROL3_BIST_TMODE		BIT(5)	/* 302B Only */
+#define FUSB_REG_CONTROL3_AUTO_HARDRESET	BIT(4)
+#define FUSB_REG_CONTROL3_AUTO_SOFTRESET	BIT(3)
+#define FUSB_REG_CONTROL3_N_RETRIES		BIT(1)
+#define FUSB_REG_CONTROL3_N_RETRIES_MASK	(0x6)
+#define FUSB_REG_CONTROL3_N_RETRIES_3		(0x6)
+#define FUSB_REG_CONTROL3_N_RETRIES_2		(0x4)
+#define FUSB_REG_CONTROL3_N_RETRIES_1		(0x2)
+#define FUSB_REG_CONTROL3_AUTO_RETRY		BIT(0)
+#define FUSB_REG_MASK				0x0A
+#define FUSB_REG_MASK_VBUSOK			BIT(7)
+#define FUSB_REG_MASK_ACTIVITY			BIT(6)
+#define FUSB_REG_MASK_COMP_CHNG			BIT(5)
+#define FUSB_REG_MASK_CRC_CHK			BIT(4)
+#define FUSB_REG_MASK_ALERT			BIT(3)
+#define FUSB_REG_MASK_WAKE			BIT(2)
+#define FUSB_REG_MASK_COLLISION			BIT(1)
+#define FUSB_REG_MASK_BC_LVL			BIT(0)
+#define FUSB_REG_POWER				0x0B
+#define FUSB_REG_POWER_PWR			BIT(0)
+#define FUSB_REG_POWER_PWR_LOW			0x1
+#define FUSB_REG_POWER_PWR_MEDIUM		0x3
+#define FUSB_REG_POWER_PWR_HIGH			0x7
+#define FUSB_REG_POWER_PWR_ALL			0xF
+#define FUSB_REG_RESET				0x0C
+#define FUSB_REG_RESET_PD_RESET			BIT(1)
+#define FUSB_REG_RESET_SW_RESET			BIT(0)
+#define FUSB_REG_MASKA				0x0E
+#define FUSB_REG_MASKA_OCP_TEMP			BIT(7)
+#define FUSB_REG_MASKA_TOGDONE			BIT(6)
+#define FUSB_REG_MASKA_SOFTFAIL			BIT(5)
+#define FUSB_REG_MASKA_RETRYFAIL		BIT(4)
+#define FUSB_REG_MASKA_HARDSENT			BIT(3)
+#define FUSB_REG_MASKA_TX_SUCCESS		BIT(2)
+#define FUSB_REG_MASKA_SOFTRESET		BIT(1)
+#define FUSB_REG_MASKA_HARDRESET		BIT(0)
+#define FUSB_REG_MASKB				0x0F
+#define FUSB_REG_MASKB_GCRCSENT			BIT(0)
+#define FUSB_REG_STATUS0A			0x3C
+#define FUSB_REG_STATUS0A_SOFTFAIL		BIT(5)
+#define FUSB_REG_STATUS0A_RETRYFAIL		BIT(4)
+#define FUSB_REG_STATUS0A_POWER			BIT(2)
+#define FUSB_REG_STATUS0A_RX_SOFT_RESET		BIT(1)
+#define FUSB_REG_STATUS0A_RX_HARD_RESET		BIT(0)
+#define FUSB_REG_STATUS1A			0x3D
+#define FUSB_REG_STATUS1A_TOGSS			BIT(3)
+#define FUSB_REG_STATUS1A_TOGSS_RUNNING		0x0
+#define FUSB_REG_STATUS1A_TOGSS_SRC1		0x1
+#define FUSB_REG_STATUS1A_TOGSS_SRC2		0x2
+#define FUSB_REG_STATUS1A_TOGSS_SNK1		0x5
+#define FUSB_REG_STATUS1A_TOGSS_SNK2		0x6
+#define FUSB_REG_STATUS1A_TOGSS_AA		0x7
+#define FUSB_REG_STATUS1A_TOGSS_POS		(3)
+#define FUSB_REG_STATUS1A_TOGSS_MASK		(0x7)
+#define FUSB_REG_STATUS1A_RXSOP2DB		BIT(2)
+#define FUSB_REG_STATUS1A_RXSOP1DB		BIT(1)
+#define FUSB_REG_STATUS1A_RXSOP			BIT(0)
+#define FUSB_REG_INTERRUPTA			0x3E
+#define FUSB_REG_INTERRUPTA_OCP_TEMP		BIT(7)
+#define FUSB_REG_INTERRUPTA_TOGDONE		BIT(6)
+#define FUSB_REG_INTERRUPTA_SOFTFAIL		BIT(5)
+#define FUSB_REG_INTERRUPTA_RETRYFAIL		BIT(4)
+#define FUSB_REG_INTERRUPTA_HARDSENT		BIT(3)
+#define FUSB_REG_INTERRUPTA_TX_SUCCESS		BIT(2)
+#define FUSB_REG_INTERRUPTA_SOFTRESET		BIT(1)
+#define FUSB_REG_INTERRUPTA_HARDRESET		BIT(0)
+#define FUSB_REG_INTERRUPTB			0x3F
+#define FUSB_REG_INTERRUPTB_GCRCSENT		BIT(0)
+#define FUSB_REG_STATUS0			0x40
+#define FUSB_REG_STATUS0_VBUSOK			BIT(7)
+#define FUSB_REG_STATUS0_ACTIVITY		BIT(6)
+#define FUSB_REG_STATUS0_COMP			BIT(5)
+#define FUSB_REG_STATUS0_CRC_CHK		BIT(4)
+#define FUSB_REG_STATUS0_ALERT			BIT(3)
+#define FUSB_REG_STATUS0_WAKE			BIT(2)
+#define FUSB_REG_STATUS0_BC_LVL_MASK		0x03
+#define FUSB_REG_STATUS0_BC_LVL_0_200		0x0
+#define FUSB_REG_STATUS0_BC_LVL_200_600		0x1
+#define FUSB_REG_STATUS0_BC_LVL_600_1230	0x2
+#define FUSB_REG_STATUS0_BC_LVL_1230_MAX	0x3
+#define FUSB_REG_STATUS0_BC_LVL1		BIT(1)
+#define FUSB_REG_STATUS0_BC_LVL0		BIT(0)
+#define FUSB_REG_STATUS1			0x41
+#define FUSB_REG_STATUS1_RXSOP2			BIT(7)
+#define FUSB_REG_STATUS1_RXSOP1			BIT(6)
+#define FUSB_REG_STATUS1_RX_EMPTY		BIT(5)
+#define FUSB_REG_STATUS1_RX_FULL		BIT(4)
+#define FUSB_REG_STATUS1_TX_EMPTY		BIT(3)
+#define FUSB_REG_STATUS1_TX_FULL		BIT(2)
+#define FUSB_REG_INTERRUPT			0x42
+#define FUSB_REG_INTERRUPT_VBUSOK		BIT(7)
+#define FUSB_REG_INTERRUPT_ACTIVITY		BIT(6)
+#define FUSB_REG_INTERRUPT_COMP_CHNG		BIT(5)
+#define FUSB_REG_INTERRUPT_CRC_CHK		BIT(4)
+#define FUSB_REG_INTERRUPT_ALERT		BIT(3)
+#define FUSB_REG_INTERRUPT_WAKE			BIT(2)
+#define FUSB_REG_INTERRUPT_COLLISION		BIT(1)
+#define FUSB_REG_INTERRUPT_BC_LVL		BIT(0)
+#define FUSB_REG_FIFOS				0x43
+
+/* Tokens defined for the FUSB302 TX FIFO */
+enum fusb302_txfifo_tokens {
+	FUSB302_TKN_TXON = 0xA1,
+	FUSB302_TKN_SYNC1 = 0x12,
+	FUSB302_TKN_SYNC2 = 0x13,
+	FUSB302_TKN_SYNC3 = 0x1B,
+	FUSB302_TKN_RST1 = 0x15,
+	FUSB302_TKN_RST2 = 0x16,
+	FUSB302_TKN_PACKSYM = 0x80,
+	FUSB302_TKN_JAMCRC = 0xFF,
+	FUSB302_TKN_EOP = 0x14,
+	FUSB302_TKN_TXOFF = 0xFE,
+};
+
+#endif
-- 
2.7.4

Powered by blists - more mailing lists