The driver is in good enough shape to be moved out of staging.
Do it.
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
help
Type-C Port Controller driver for TCPCI-compliant controller.
-source "drivers/staging/typec/fusb302/Kconfig"
-
endif
endmenu
obj-$(CONFIG_TYPEC_TCPCI) += tcpci.o
-obj-y += fusb302/
+++ /dev/null
-config TYPEC_FUSB302
- tristate "Fairchild FUSB302 Type-C chip driver"
- depends on I2C && POWER_SUPPLY
- help
- The Fairchild FUSB302 Type-C chip driver that works with
- Type-C Port Controller Manager to provide USB PD and USB
- Type-C functionalities.
+++ /dev/null
-obj-$(CONFIG_TYPEC_FUSB302) += fusb302.o
+++ /dev/null
-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.
+++ /dev/null
-/*
- * 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@gmail.com>");
-MODULE_DESCRIPTION("Fairchild FUSB302 Type-C Chip Driver");
-MODULE_LICENSE("GPL");
+++ /dev/null
-/*
- * 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
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
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/
--- /dev/null
+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.
--- /dev/null
+obj-$(CONFIG_TYPEC_FUSB302) += fusb302.o
--- /dev/null
+/*
+ * 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@gmail.com>");
+MODULE_DESCRIPTION("Fairchild FUSB302 Type-C Chip Driver");
+MODULE_LICENSE("GPL");
--- /dev/null
+/*
+ * 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
projects / mirror_ubuntu-bionic-kernel.git / commitdiff