From: Guenter Roeck Date: Tue, 12 Sep 2017 03:32:08 +0000 (-0700) Subject: usb: typec: fusb302: Move out of staging X-Git-Tag: Ubuntu-5.2.0-15.16~5614^2~173 X-Git-Url: https://git.proxmox.com/?a=commitdiff_plain;h=76f0c53d08b933b4708be0d775ba57a0fb4d858a;p=mirror_ubuntu-eoan-kernel.git usb: typec: fusb302: Move out of staging The driver is in good enough shape to be moved out of staging. Do it. Signed-off-by: Guenter Roeck Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/staging/typec/Kconfig b/drivers/staging/typec/Kconfig index 31fad23c2553..5359f556d203 100644 --- a/drivers/staging/typec/Kconfig +++ b/drivers/staging/typec/Kconfig @@ -9,8 +9,6 @@ config TYPEC_TCPCI help Type-C Port Controller driver for TCPCI-compliant controller. -source "drivers/staging/typec/fusb302/Kconfig" - endif endmenu diff --git a/drivers/staging/typec/Makefile b/drivers/staging/typec/Makefile index e1df3f0fde10..53d649abcb53 100644 --- a/drivers/staging/typec/Makefile +++ b/drivers/staging/typec/Makefile @@ -1,2 +1 @@ obj-$(CONFIG_TYPEC_TCPCI) += tcpci.o -obj-y += fusb302/ diff --git a/drivers/staging/typec/fusb302/Kconfig b/drivers/staging/typec/fusb302/Kconfig deleted file mode 100644 index 48a4f2fcee03..000000000000 --- a/drivers/staging/typec/fusb302/Kconfig +++ /dev/null @@ -1,7 +0,0 @@ -config TYPEC_FUSB302 - tristate "Fairchild FUSB302 Type-C chip driver" - depends on I2C && POWER_SUPPLY - help - The Fairchild FUSB302 Type-C chip driver that works with - Type-C Port Controller Manager to provide USB PD and USB - Type-C functionalities. diff --git a/drivers/staging/typec/fusb302/Makefile b/drivers/staging/typec/fusb302/Makefile deleted file mode 100644 index 207efa5fbab8..000000000000 --- a/drivers/staging/typec/fusb302/Makefile +++ /dev/null @@ -1 +0,0 @@ -obj-$(CONFIG_TYPEC_FUSB302) += fusb302.o diff --git a/drivers/staging/typec/fusb302/TODO b/drivers/staging/typec/fusb302/TODO deleted file mode 100644 index 19b466eb585d..000000000000 --- a/drivers/staging/typec/fusb302/TODO +++ /dev/null @@ -1,10 +0,0 @@ -fusb302: -- Find a better logging scheme, at least not having the same debugging/logging - code replicated here and in tcpm -- Find a non-hacky way to coordinate between PM and I2C access -- Documentation? The FUSB302 datasheet provides information on the chip to help - understand the code. But it may still be helpful to have a documentation. -- We may want to replace the "fcs,max-snk-microvolt", "fcs,max-snk-microamp", - "fcs,max-snk-microwatt" and "fcs,operating-snk-microwatt" device(tree) - properties with properties which are part of a generic type-c controller - devicetree binding. diff --git a/drivers/staging/typec/fusb302/fusb302.c b/drivers/staging/typec/fusb302/fusb302.c deleted file mode 100644 index e790b67d4953..000000000000 --- a/drivers/staging/typec/fusb302/fusb302.c +++ /dev/null @@ -1,1947 +0,0 @@ -/* - * Copyright 2016-2017 Google, Inc - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * Fairchild FUSB302 Type-C Chip Driver - */ - -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include - -#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 "); -MODULE_DESCRIPTION("Fairchild FUSB302 Type-C Chip Driver"); -MODULE_LICENSE("GPL"); diff --git a/drivers/staging/typec/fusb302/fusb302_reg.h b/drivers/staging/typec/fusb302/fusb302_reg.h deleted file mode 100644 index 0682e63de773..000000000000 --- a/drivers/staging/typec/fusb302/fusb302_reg.h +++ /dev/null @@ -1,186 +0,0 @@ -/* - * Copyright 2016-2017 Google, Inc - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * Fairchild FUSB302 Type-C Chip Driver - */ - -#ifndef FUSB302_REG_H -#define FUSB302_REG_H - -#define FUSB_REG_DEVICE_ID 0x01 -#define FUSB_REG_SWITCHES0 0x02 -#define FUSB_REG_SWITCHES0_CC2_PU_EN BIT(7) -#define FUSB_REG_SWITCHES0_CC1_PU_EN BIT(6) -#define FUSB_REG_SWITCHES0_VCONN_CC2 BIT(5) -#define FUSB_REG_SWITCHES0_VCONN_CC1 BIT(4) -#define FUSB_REG_SWITCHES0_MEAS_CC2 BIT(3) -#define FUSB_REG_SWITCHES0_MEAS_CC1 BIT(2) -#define FUSB_REG_SWITCHES0_CC2_PD_EN BIT(1) -#define FUSB_REG_SWITCHES0_CC1_PD_EN BIT(0) -#define FUSB_REG_SWITCHES1 0x03 -#define FUSB_REG_SWITCHES1_POWERROLE BIT(7) -#define FUSB_REG_SWITCHES1_SPECREV1 BIT(6) -#define FUSB_REG_SWITCHES1_SPECREV0 BIT(5) -#define FUSB_REG_SWITCHES1_DATAROLE BIT(4) -#define FUSB_REG_SWITCHES1_AUTO_GCRC BIT(2) -#define FUSB_REG_SWITCHES1_TXCC2_EN BIT(1) -#define FUSB_REG_SWITCHES1_TXCC1_EN BIT(0) -#define FUSB_REG_MEASURE 0x04 -#define FUSB_REG_MEASURE_MDAC5 BIT(7) -#define FUSB_REG_MEASURE_MDAC4 BIT(6) -#define FUSB_REG_MEASURE_MDAC3 BIT(5) -#define FUSB_REG_MEASURE_MDAC2 BIT(4) -#define FUSB_REG_MEASURE_MDAC1 BIT(3) -#define FUSB_REG_MEASURE_MDAC0 BIT(2) -#define FUSB_REG_MEASURE_VBUS BIT(1) -#define FUSB_REG_MEASURE_XXXX5 BIT(0) -#define FUSB_REG_CONTROL0 0x06 -#define FUSB_REG_CONTROL0_TX_FLUSH BIT(6) -#define FUSB_REG_CONTROL0_INT_MASK BIT(5) -#define FUSB_REG_CONTROL0_HOST_CUR_MASK (0xC) -#define FUSB_REG_CONTROL0_HOST_CUR_HIGH (0xC) -#define FUSB_REG_CONTROL0_HOST_CUR_MED (0x8) -#define FUSB_REG_CONTROL0_HOST_CUR_DEF (0x4) -#define FUSB_REG_CONTROL0_TX_START BIT(0) -#define FUSB_REG_CONTROL1 0x07 -#define FUSB_REG_CONTROL1_ENSOP2DB BIT(6) -#define FUSB_REG_CONTROL1_ENSOP1DB BIT(5) -#define FUSB_REG_CONTROL1_BIST_MODE2 BIT(4) -#define FUSB_REG_CONTROL1_RX_FLUSH BIT(2) -#define FUSB_REG_CONTROL1_ENSOP2 BIT(1) -#define FUSB_REG_CONTROL1_ENSOP1 BIT(0) -#define FUSB_REG_CONTROL2 0x08 -#define FUSB_REG_CONTROL2_MODE BIT(1) -#define FUSB_REG_CONTROL2_MODE_MASK (0x6) -#define FUSB_REG_CONTROL2_MODE_DFP (0x6) -#define FUSB_REG_CONTROL2_MODE_UFP (0x4) -#define FUSB_REG_CONTROL2_MODE_DRP (0x2) -#define FUSB_REG_CONTROL2_MODE_NONE (0x0) -#define FUSB_REG_CONTROL2_TOGGLE BIT(0) -#define FUSB_REG_CONTROL3 0x09 -#define FUSB_REG_CONTROL3_SEND_HARDRESET BIT(6) -#define FUSB_REG_CONTROL3_BIST_TMODE BIT(5) /* 302B Only */ -#define FUSB_REG_CONTROL3_AUTO_HARDRESET BIT(4) -#define FUSB_REG_CONTROL3_AUTO_SOFTRESET BIT(3) -#define FUSB_REG_CONTROL3_N_RETRIES BIT(1) -#define FUSB_REG_CONTROL3_N_RETRIES_MASK (0x6) -#define FUSB_REG_CONTROL3_N_RETRIES_3 (0x6) -#define FUSB_REG_CONTROL3_N_RETRIES_2 (0x4) -#define FUSB_REG_CONTROL3_N_RETRIES_1 (0x2) -#define FUSB_REG_CONTROL3_AUTO_RETRY BIT(0) -#define FUSB_REG_MASK 0x0A -#define FUSB_REG_MASK_VBUSOK BIT(7) -#define FUSB_REG_MASK_ACTIVITY BIT(6) -#define FUSB_REG_MASK_COMP_CHNG BIT(5) -#define FUSB_REG_MASK_CRC_CHK BIT(4) -#define FUSB_REG_MASK_ALERT BIT(3) -#define FUSB_REG_MASK_WAKE BIT(2) -#define FUSB_REG_MASK_COLLISION BIT(1) -#define FUSB_REG_MASK_BC_LVL BIT(0) -#define FUSB_REG_POWER 0x0B -#define FUSB_REG_POWER_PWR BIT(0) -#define FUSB_REG_POWER_PWR_LOW 0x1 -#define FUSB_REG_POWER_PWR_MEDIUM 0x3 -#define FUSB_REG_POWER_PWR_HIGH 0x7 -#define FUSB_REG_POWER_PWR_ALL 0xF -#define FUSB_REG_RESET 0x0C -#define FUSB_REG_RESET_PD_RESET BIT(1) -#define FUSB_REG_RESET_SW_RESET BIT(0) -#define FUSB_REG_MASKA 0x0E -#define FUSB_REG_MASKA_OCP_TEMP BIT(7) -#define FUSB_REG_MASKA_TOGDONE BIT(6) -#define FUSB_REG_MASKA_SOFTFAIL BIT(5) -#define FUSB_REG_MASKA_RETRYFAIL BIT(4) -#define FUSB_REG_MASKA_HARDSENT BIT(3) -#define FUSB_REG_MASKA_TX_SUCCESS BIT(2) -#define FUSB_REG_MASKA_SOFTRESET BIT(1) -#define FUSB_REG_MASKA_HARDRESET BIT(0) -#define FUSB_REG_MASKB 0x0F -#define FUSB_REG_MASKB_GCRCSENT BIT(0) -#define FUSB_REG_STATUS0A 0x3C -#define FUSB_REG_STATUS0A_SOFTFAIL BIT(5) -#define FUSB_REG_STATUS0A_RETRYFAIL BIT(4) -#define FUSB_REG_STATUS0A_POWER BIT(2) -#define FUSB_REG_STATUS0A_RX_SOFT_RESET BIT(1) -#define FUSB_REG_STATUS0A_RX_HARD_RESET BIT(0) -#define FUSB_REG_STATUS1A 0x3D -#define FUSB_REG_STATUS1A_TOGSS BIT(3) -#define FUSB_REG_STATUS1A_TOGSS_RUNNING 0x0 -#define FUSB_REG_STATUS1A_TOGSS_SRC1 0x1 -#define FUSB_REG_STATUS1A_TOGSS_SRC2 0x2 -#define FUSB_REG_STATUS1A_TOGSS_SNK1 0x5 -#define FUSB_REG_STATUS1A_TOGSS_SNK2 0x6 -#define FUSB_REG_STATUS1A_TOGSS_AA 0x7 -#define FUSB_REG_STATUS1A_TOGSS_POS (3) -#define FUSB_REG_STATUS1A_TOGSS_MASK (0x7) -#define FUSB_REG_STATUS1A_RXSOP2DB BIT(2) -#define FUSB_REG_STATUS1A_RXSOP1DB BIT(1) -#define FUSB_REG_STATUS1A_RXSOP BIT(0) -#define FUSB_REG_INTERRUPTA 0x3E -#define FUSB_REG_INTERRUPTA_OCP_TEMP BIT(7) -#define FUSB_REG_INTERRUPTA_TOGDONE BIT(6) -#define FUSB_REG_INTERRUPTA_SOFTFAIL BIT(5) -#define FUSB_REG_INTERRUPTA_RETRYFAIL BIT(4) -#define FUSB_REG_INTERRUPTA_HARDSENT BIT(3) -#define FUSB_REG_INTERRUPTA_TX_SUCCESS BIT(2) -#define FUSB_REG_INTERRUPTA_SOFTRESET BIT(1) -#define FUSB_REG_INTERRUPTA_HARDRESET BIT(0) -#define FUSB_REG_INTERRUPTB 0x3F -#define FUSB_REG_INTERRUPTB_GCRCSENT BIT(0) -#define FUSB_REG_STATUS0 0x40 -#define FUSB_REG_STATUS0_VBUSOK BIT(7) -#define FUSB_REG_STATUS0_ACTIVITY BIT(6) -#define FUSB_REG_STATUS0_COMP BIT(5) -#define FUSB_REG_STATUS0_CRC_CHK BIT(4) -#define FUSB_REG_STATUS0_ALERT BIT(3) -#define FUSB_REG_STATUS0_WAKE BIT(2) -#define FUSB_REG_STATUS0_BC_LVL_MASK 0x03 -#define FUSB_REG_STATUS0_BC_LVL_0_200 0x0 -#define FUSB_REG_STATUS0_BC_LVL_200_600 0x1 -#define FUSB_REG_STATUS0_BC_LVL_600_1230 0x2 -#define FUSB_REG_STATUS0_BC_LVL_1230_MAX 0x3 -#define FUSB_REG_STATUS0_BC_LVL1 BIT(1) -#define FUSB_REG_STATUS0_BC_LVL0 BIT(0) -#define FUSB_REG_STATUS1 0x41 -#define FUSB_REG_STATUS1_RXSOP2 BIT(7) -#define FUSB_REG_STATUS1_RXSOP1 BIT(6) -#define FUSB_REG_STATUS1_RX_EMPTY BIT(5) -#define FUSB_REG_STATUS1_RX_FULL BIT(4) -#define FUSB_REG_STATUS1_TX_EMPTY BIT(3) -#define FUSB_REG_STATUS1_TX_FULL BIT(2) -#define FUSB_REG_INTERRUPT 0x42 -#define FUSB_REG_INTERRUPT_VBUSOK BIT(7) -#define FUSB_REG_INTERRUPT_ACTIVITY BIT(6) -#define FUSB_REG_INTERRUPT_COMP_CHNG BIT(5) -#define FUSB_REG_INTERRUPT_CRC_CHK BIT(4) -#define FUSB_REG_INTERRUPT_ALERT BIT(3) -#define FUSB_REG_INTERRUPT_WAKE BIT(2) -#define FUSB_REG_INTERRUPT_COLLISION BIT(1) -#define FUSB_REG_INTERRUPT_BC_LVL BIT(0) -#define FUSB_REG_FIFOS 0x43 - -/* Tokens defined for the FUSB302 TX FIFO */ -enum fusb302_txfifo_tokens { - FUSB302_TKN_TXON = 0xA1, - FUSB302_TKN_SYNC1 = 0x12, - FUSB302_TKN_SYNC2 = 0x13, - FUSB302_TKN_SYNC3 = 0x1B, - FUSB302_TKN_RST1 = 0x15, - FUSB302_TKN_RST2 = 0x16, - FUSB302_TKN_PACKSYM = 0x80, - FUSB302_TKN_JAMCRC = 0xFF, - FUSB302_TKN_EOP = 0x14, - FUSB302_TKN_TXOFF = 0xFE, -}; - -#endif diff --git a/drivers/usb/typec/Kconfig b/drivers/usb/typec/Kconfig index 888605860091..819c0ed2b200 100644 --- a/drivers/usb/typec/Kconfig +++ b/drivers/usb/typec/Kconfig @@ -12,6 +12,12 @@ config TYPEC_TCPM The Type-C Port Controller Manager provides a USB PD and USB Type-C state machine for use with Type-C Port Controllers. +if TYPEC_TCPM + +source "drivers/usb/typec/fusb302/Kconfig" + +endif + config TYPEC_WCOVE tristate "Intel WhiskeyCove PMIC USB Type-C PHY driver" depends on ACPI diff --git a/drivers/usb/typec/Makefile b/drivers/usb/typec/Makefile index eb883984724b..b77688ce1f16 100644 --- a/drivers/usb/typec/Makefile +++ b/drivers/usb/typec/Makefile @@ -1,4 +1,5 @@ obj-$(CONFIG_TYPEC) += typec.o obj-$(CONFIG_TYPEC_TCPM) += tcpm.o +obj-y += fusb302/ obj-$(CONFIG_TYPEC_WCOVE) += typec_wcove.o obj-$(CONFIG_TYPEC_UCSI) += ucsi/ diff --git a/drivers/usb/typec/fusb302/Kconfig b/drivers/usb/typec/fusb302/Kconfig new file mode 100644 index 000000000000..48a4f2fcee03 --- /dev/null +++ b/drivers/usb/typec/fusb302/Kconfig @@ -0,0 +1,7 @@ +config TYPEC_FUSB302 + tristate "Fairchild FUSB302 Type-C chip driver" + depends on I2C && POWER_SUPPLY + help + The Fairchild FUSB302 Type-C chip driver that works with + Type-C Port Controller Manager to provide USB PD and USB + Type-C functionalities. diff --git a/drivers/usb/typec/fusb302/Makefile b/drivers/usb/typec/fusb302/Makefile new file mode 100644 index 000000000000..207efa5fbab8 --- /dev/null +++ b/drivers/usb/typec/fusb302/Makefile @@ -0,0 +1 @@ +obj-$(CONFIG_TYPEC_FUSB302) += fusb302.o diff --git a/drivers/usb/typec/fusb302/fusb302.c b/drivers/usb/typec/fusb302/fusb302.c new file mode 100644 index 000000000000..e790b67d4953 --- /dev/null +++ b/drivers/usb/typec/fusb302/fusb302.c @@ -0,0 +1,1947 @@ +/* + * Copyright 2016-2017 Google, Inc + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * Fairchild FUSB302 Type-C Chip Driver + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#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 "); +MODULE_DESCRIPTION("Fairchild FUSB302 Type-C Chip Driver"); +MODULE_LICENSE("GPL"); diff --git a/drivers/usb/typec/fusb302/fusb302_reg.h b/drivers/usb/typec/fusb302/fusb302_reg.h new file mode 100644 index 000000000000..0682e63de773 --- /dev/null +++ b/drivers/usb/typec/fusb302/fusb302_reg.h @@ -0,0 +1,186 @@ +/* + * Copyright 2016-2017 Google, Inc + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * Fairchild FUSB302 Type-C Chip Driver + */ + +#ifndef FUSB302_REG_H +#define FUSB302_REG_H + +#define FUSB_REG_DEVICE_ID 0x01 +#define FUSB_REG_SWITCHES0 0x02 +#define FUSB_REG_SWITCHES0_CC2_PU_EN BIT(7) +#define FUSB_REG_SWITCHES0_CC1_PU_EN BIT(6) +#define FUSB_REG_SWITCHES0_VCONN_CC2 BIT(5) +#define FUSB_REG_SWITCHES0_VCONN_CC1 BIT(4) +#define FUSB_REG_SWITCHES0_MEAS_CC2 BIT(3) +#define FUSB_REG_SWITCHES0_MEAS_CC1 BIT(2) +#define FUSB_REG_SWITCHES0_CC2_PD_EN BIT(1) +#define FUSB_REG_SWITCHES0_CC1_PD_EN BIT(0) +#define FUSB_REG_SWITCHES1 0x03 +#define FUSB_REG_SWITCHES1_POWERROLE BIT(7) +#define FUSB_REG_SWITCHES1_SPECREV1 BIT(6) +#define FUSB_REG_SWITCHES1_SPECREV0 BIT(5) +#define FUSB_REG_SWITCHES1_DATAROLE BIT(4) +#define FUSB_REG_SWITCHES1_AUTO_GCRC BIT(2) +#define FUSB_REG_SWITCHES1_TXCC2_EN BIT(1) +#define FUSB_REG_SWITCHES1_TXCC1_EN BIT(0) +#define FUSB_REG_MEASURE 0x04 +#define FUSB_REG_MEASURE_MDAC5 BIT(7) +#define FUSB_REG_MEASURE_MDAC4 BIT(6) +#define FUSB_REG_MEASURE_MDAC3 BIT(5) +#define FUSB_REG_MEASURE_MDAC2 BIT(4) +#define FUSB_REG_MEASURE_MDAC1 BIT(3) +#define FUSB_REG_MEASURE_MDAC0 BIT(2) +#define FUSB_REG_MEASURE_VBUS BIT(1) +#define FUSB_REG_MEASURE_XXXX5 BIT(0) +#define FUSB_REG_CONTROL0 0x06 +#define FUSB_REG_CONTROL0_TX_FLUSH BIT(6) +#define FUSB_REG_CONTROL0_INT_MASK BIT(5) +#define FUSB_REG_CONTROL0_HOST_CUR_MASK (0xC) +#define FUSB_REG_CONTROL0_HOST_CUR_HIGH (0xC) +#define FUSB_REG_CONTROL0_HOST_CUR_MED (0x8) +#define FUSB_REG_CONTROL0_HOST_CUR_DEF (0x4) +#define FUSB_REG_CONTROL0_TX_START BIT(0) +#define FUSB_REG_CONTROL1 0x07 +#define FUSB_REG_CONTROL1_ENSOP2DB BIT(6) +#define FUSB_REG_CONTROL1_ENSOP1DB BIT(5) +#define FUSB_REG_CONTROL1_BIST_MODE2 BIT(4) +#define FUSB_REG_CONTROL1_RX_FLUSH BIT(2) +#define FUSB_REG_CONTROL1_ENSOP2 BIT(1) +#define FUSB_REG_CONTROL1_ENSOP1 BIT(0) +#define FUSB_REG_CONTROL2 0x08 +#define FUSB_REG_CONTROL2_MODE BIT(1) +#define FUSB_REG_CONTROL2_MODE_MASK (0x6) +#define FUSB_REG_CONTROL2_MODE_DFP (0x6) +#define FUSB_REG_CONTROL2_MODE_UFP (0x4) +#define FUSB_REG_CONTROL2_MODE_DRP (0x2) +#define FUSB_REG_CONTROL2_MODE_NONE (0x0) +#define FUSB_REG_CONTROL2_TOGGLE BIT(0) +#define FUSB_REG_CONTROL3 0x09 +#define FUSB_REG_CONTROL3_SEND_HARDRESET BIT(6) +#define FUSB_REG_CONTROL3_BIST_TMODE BIT(5) /* 302B Only */ +#define FUSB_REG_CONTROL3_AUTO_HARDRESET BIT(4) +#define FUSB_REG_CONTROL3_AUTO_SOFTRESET BIT(3) +#define FUSB_REG_CONTROL3_N_RETRIES BIT(1) +#define FUSB_REG_CONTROL3_N_RETRIES_MASK (0x6) +#define FUSB_REG_CONTROL3_N_RETRIES_3 (0x6) +#define FUSB_REG_CONTROL3_N_RETRIES_2 (0x4) +#define FUSB_REG_CONTROL3_N_RETRIES_1 (0x2) +#define FUSB_REG_CONTROL3_AUTO_RETRY BIT(0) +#define FUSB_REG_MASK 0x0A +#define FUSB_REG_MASK_VBUSOK BIT(7) +#define FUSB_REG_MASK_ACTIVITY BIT(6) +#define FUSB_REG_MASK_COMP_CHNG BIT(5) +#define FUSB_REG_MASK_CRC_CHK BIT(4) +#define FUSB_REG_MASK_ALERT BIT(3) +#define FUSB_REG_MASK_WAKE BIT(2) +#define FUSB_REG_MASK_COLLISION BIT(1) +#define FUSB_REG_MASK_BC_LVL BIT(0) +#define FUSB_REG_POWER 0x0B +#define FUSB_REG_POWER_PWR BIT(0) +#define FUSB_REG_POWER_PWR_LOW 0x1 +#define FUSB_REG_POWER_PWR_MEDIUM 0x3 +#define FUSB_REG_POWER_PWR_HIGH 0x7 +#define FUSB_REG_POWER_PWR_ALL 0xF +#define FUSB_REG_RESET 0x0C +#define FUSB_REG_RESET_PD_RESET BIT(1) +#define FUSB_REG_RESET_SW_RESET BIT(0) +#define FUSB_REG_MASKA 0x0E +#define FUSB_REG_MASKA_OCP_TEMP BIT(7) +#define FUSB_REG_MASKA_TOGDONE BIT(6) +#define FUSB_REG_MASKA_SOFTFAIL BIT(5) +#define FUSB_REG_MASKA_RETRYFAIL BIT(4) +#define FUSB_REG_MASKA_HARDSENT BIT(3) +#define FUSB_REG_MASKA_TX_SUCCESS BIT(2) +#define FUSB_REG_MASKA_SOFTRESET BIT(1) +#define FUSB_REG_MASKA_HARDRESET BIT(0) +#define FUSB_REG_MASKB 0x0F +#define FUSB_REG_MASKB_GCRCSENT BIT(0) +#define FUSB_REG_STATUS0A 0x3C +#define FUSB_REG_STATUS0A_SOFTFAIL BIT(5) +#define FUSB_REG_STATUS0A_RETRYFAIL BIT(4) +#define FUSB_REG_STATUS0A_POWER BIT(2) +#define FUSB_REG_STATUS0A_RX_SOFT_RESET BIT(1) +#define FUSB_REG_STATUS0A_RX_HARD_RESET BIT(0) +#define FUSB_REG_STATUS1A 0x3D +#define FUSB_REG_STATUS1A_TOGSS BIT(3) +#define FUSB_REG_STATUS1A_TOGSS_RUNNING 0x0 +#define FUSB_REG_STATUS1A_TOGSS_SRC1 0x1 +#define FUSB_REG_STATUS1A_TOGSS_SRC2 0x2 +#define FUSB_REG_STATUS1A_TOGSS_SNK1 0x5 +#define FUSB_REG_STATUS1A_TOGSS_SNK2 0x6 +#define FUSB_REG_STATUS1A_TOGSS_AA 0x7 +#define FUSB_REG_STATUS1A_TOGSS_POS (3) +#define FUSB_REG_STATUS1A_TOGSS_MASK (0x7) +#define FUSB_REG_STATUS1A_RXSOP2DB BIT(2) +#define FUSB_REG_STATUS1A_RXSOP1DB BIT(1) +#define FUSB_REG_STATUS1A_RXSOP BIT(0) +#define FUSB_REG_INTERRUPTA 0x3E +#define FUSB_REG_INTERRUPTA_OCP_TEMP BIT(7) +#define FUSB_REG_INTERRUPTA_TOGDONE BIT(6) +#define FUSB_REG_INTERRUPTA_SOFTFAIL BIT(5) +#define FUSB_REG_INTERRUPTA_RETRYFAIL BIT(4) +#define FUSB_REG_INTERRUPTA_HARDSENT BIT(3) +#define FUSB_REG_INTERRUPTA_TX_SUCCESS BIT(2) +#define FUSB_REG_INTERRUPTA_SOFTRESET BIT(1) +#define FUSB_REG_INTERRUPTA_HARDRESET BIT(0) +#define FUSB_REG_INTERRUPTB 0x3F +#define FUSB_REG_INTERRUPTB_GCRCSENT BIT(0) +#define FUSB_REG_STATUS0 0x40 +#define FUSB_REG_STATUS0_VBUSOK BIT(7) +#define FUSB_REG_STATUS0_ACTIVITY BIT(6) +#define FUSB_REG_STATUS0_COMP BIT(5) +#define FUSB_REG_STATUS0_CRC_CHK BIT(4) +#define FUSB_REG_STATUS0_ALERT BIT(3) +#define FUSB_REG_STATUS0_WAKE BIT(2) +#define FUSB_REG_STATUS0_BC_LVL_MASK 0x03 +#define FUSB_REG_STATUS0_BC_LVL_0_200 0x0 +#define FUSB_REG_STATUS0_BC_LVL_200_600 0x1 +#define FUSB_REG_STATUS0_BC_LVL_600_1230 0x2 +#define FUSB_REG_STATUS0_BC_LVL_1230_MAX 0x3 +#define FUSB_REG_STATUS0_BC_LVL1 BIT(1) +#define FUSB_REG_STATUS0_BC_LVL0 BIT(0) +#define FUSB_REG_STATUS1 0x41 +#define FUSB_REG_STATUS1_RXSOP2 BIT(7) +#define FUSB_REG_STATUS1_RXSOP1 BIT(6) +#define FUSB_REG_STATUS1_RX_EMPTY BIT(5) +#define FUSB_REG_STATUS1_RX_FULL BIT(4) +#define FUSB_REG_STATUS1_TX_EMPTY BIT(3) +#define FUSB_REG_STATUS1_TX_FULL BIT(2) +#define FUSB_REG_INTERRUPT 0x42 +#define FUSB_REG_INTERRUPT_VBUSOK BIT(7) +#define FUSB_REG_INTERRUPT_ACTIVITY BIT(6) +#define FUSB_REG_INTERRUPT_COMP_CHNG BIT(5) +#define FUSB_REG_INTERRUPT_CRC_CHK BIT(4) +#define FUSB_REG_INTERRUPT_ALERT BIT(3) +#define FUSB_REG_INTERRUPT_WAKE BIT(2) +#define FUSB_REG_INTERRUPT_COLLISION BIT(1) +#define FUSB_REG_INTERRUPT_BC_LVL BIT(0) +#define FUSB_REG_FIFOS 0x43 + +/* Tokens defined for the FUSB302 TX FIFO */ +enum fusb302_txfifo_tokens { + FUSB302_TKN_TXON = 0xA1, + FUSB302_TKN_SYNC1 = 0x12, + FUSB302_TKN_SYNC2 = 0x13, + FUSB302_TKN_SYNC3 = 0x1B, + FUSB302_TKN_RST1 = 0x15, + FUSB302_TKN_RST2 = 0x16, + FUSB302_TKN_PACKSYM = 0x80, + FUSB302_TKN_JAMCRC = 0xFF, + FUSB302_TKN_EOP = 0x14, + FUSB302_TKN_TXOFF = 0xFE, +}; + +#endif