diff options
Diffstat (limited to 'zephyr/projects/skyrim/src/usbc_config.c')
| -rw-r--r-- | zephyr/projects/skyrim/src/usbc_config.c | 403 |
1 files changed, 403 insertions, 0 deletions
diff --git a/zephyr/projects/skyrim/src/usbc_config.c b/zephyr/projects/skyrim/src/usbc_config.c new file mode 100644 index 0000000000..dec9f928b5 --- /dev/null +++ b/zephyr/projects/skyrim/src/usbc_config.c @@ -0,0 +1,403 @@ +/* Copyright 2021 The ChromiumOS Authors + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +/* Skyrim family-specific USB-C configuration */ + +#include <zephyr/drivers/gpio.h> + +#include "cros_board_info.h" +#include "cros_cbi.h" +#include "battery_fuel_gauge.h" +#include "charge_manager.h" +#include "charge_ramp.h" +#include "charge_state_v2.h" +#include "charge_state.h" +#include "charger.h" +#include "driver/bc12/pi3usb9201.h" +#include "driver/charger/isl9241.h" +#include "driver/ppc/nx20p348x.h" +#include "driver/retimer/anx7483_public.h" +#include "driver/retimer/ps8811.h" +#include "driver/retimer/ps8818_public.h" +#include "driver/tcpm/nct38xx.h" +#include "driver/usb_mux/amd_fp6.h" +#include "gpio/gpio_int.h" +#include "hooks.h" +#include "ioexpander.h" +#include "power.h" +#include "usb_mux.h" +#include "usb_pd_tcpm.h" +#include "usbc_ppc.h" +#include "usbc/usb_muxes.h" + +#define CPRINTSUSB(format, args...) cprints(CC_USBCHARGE, format, ##args) +#define CPRINTFUSB(format, args...) cprintf(CC_USBCHARGE, format, ##args) + +/* USB-A ports */ +enum usba_port { USBA_PORT_A0 = 0, USBA_PORT_A1, USBA_PORT_COUNT }; + +/* USB-C ports */ +enum usbc_port { USBC_PORT_C0 = 0, USBC_PORT_C1, USBC_PORT_COUNT }; +BUILD_ASSERT(USBC_PORT_COUNT == CONFIG_USB_PD_PORT_MAX_COUNT); + +static void reset_nct38xx_port(int port); + +static void usbc_interrupt_init(void) +{ + /* Enable PPC interrupts. */ + gpio_enable_dt_interrupt(GPIO_INT_FROM_NODELABEL(int_usb_c0_ppc)); + gpio_enable_dt_interrupt(GPIO_INT_FROM_NODELABEL(int_usb_c1_ppc)); + + /* Enable TCPC interrupts. */ + gpio_enable_dt_interrupt(GPIO_INT_FROM_NODELABEL(int_usb_c0_tcpc)); + gpio_enable_dt_interrupt(GPIO_INT_FROM_NODELABEL(int_usb_c1_tcpc)); + + /* Enable BC 1.2 interrupts */ + gpio_enable_dt_interrupt(GPIO_INT_FROM_NODELABEL(int_usb_c0_bc12)); + gpio_enable_dt_interrupt(GPIO_INT_FROM_NODELABEL(int_usb_c1_bc12)); + + /* Enable SBU fault interrupts */ + gpio_enable_dt_interrupt(GPIO_INT_FROM_NODELABEL(int_usb_c0_sbu_fault)); + gpio_enable_dt_interrupt(GPIO_INT_FROM_NODELABEL(int_usb_c1_sbu_fault)); +} +DECLARE_HOOK(HOOK_INIT, usbc_interrupt_init, HOOK_PRIO_POST_I2C); + +static void usb_fault_interrupt_init(void) +{ + /* Enable USB fault interrupts when we hit S5 */ + gpio_enable_dt_interrupt(GPIO_INT_FROM_NODELABEL(int_usb_hub_fault)); + gpio_enable_dt_interrupt(GPIO_INT_FROM_NODELABEL(int_usb_a0_fault)); + gpio_enable_dt_interrupt(GPIO_INT_FROM_NODELABEL(int_usb_a1_fault)); +} +DECLARE_HOOK(HOOK_CHIPSET_STARTUP, usb_fault_interrupt_init, HOOK_PRIO_DEFAULT); + +static void usb_fault_interrupt_disable(void) +{ + /* Disable USB fault interrupts leaving S5 */ + gpio_disable_dt_interrupt(GPIO_INT_FROM_NODELABEL(int_usb_hub_fault)); + gpio_disable_dt_interrupt(GPIO_INT_FROM_NODELABEL(int_usb_a0_fault)); + gpio_disable_dt_interrupt(GPIO_INT_FROM_NODELABEL(int_usb_a1_fault)); +} +DECLARE_HOOK(HOOK_CHIPSET_SHUTDOWN, usb_fault_interrupt_disable, + HOOK_PRIO_DEFAULT); + +int board_set_active_charge_port(int port) +{ + int is_valid_port = (port >= 0 && port < CONFIG_USB_PD_PORT_MAX_COUNT); + int i; + int rv; + + if (port == CHARGE_PORT_NONE) { + CPRINTSUSB("Disabling all charger ports"); + + /* Disable all ports. */ + for (i = 0; i < ppc_cnt; i++) { + /* + * If this port had booted in dead battery mode, go + * ahead and reset it so EN_SNK responds properly. + */ + if (nct38xx_get_boot_type(i) == + NCT38XX_BOOT_DEAD_BATTERY) { + reset_nct38xx_port(i); + pd_set_error_recovery(i); + } + + /* + * Do not return early if one fails otherwise we can + * get into a boot loop assertion failure. + */ + if (ppc_vbus_sink_enable(i, 0)) + CPRINTSUSB("Disabling C%d as sink failed.", i); + } + + return EC_SUCCESS; + } else if (!is_valid_port) { + return EC_ERROR_INVAL; + } + + /* + * Check if we can reset any ports in dead battery mode + * + * The NCT3807 may continue to keep EN_SNK low on the dead battery port + * and allow a dangerous level of voltage to pass through to the initial + * charge port (see b/183660105). We must reset the ports if we have + * sufficient battery to do so, which will bring EN_SNK back under + * normal control. + */ + rv = EC_SUCCESS; + for (i = 0; i < board_get_usb_pd_port_count(); i++) { + if (nct38xx_get_boot_type(i) == NCT38XX_BOOT_DEAD_BATTERY) { + CPRINTSUSB("Found dead battery on %d", i); + /* + * If we have battery, get this port reset ASAP. + * This means temporarily rejecting charge manager + * sets to it. + */ + if (pd_is_battery_capable()) { + reset_nct38xx_port(i); + pd_set_error_recovery(i); + + if (port == i) + rv = EC_ERROR_INVAL; + } else if (port != i) { + /* + * If other port is selected and in dead battery + * mode, reset this port. Otherwise, reject + * change because we'll brown out. + */ + if (nct38xx_get_boot_type(port) == + NCT38XX_BOOT_DEAD_BATTERY) { + reset_nct38xx_port(i); + pd_set_error_recovery(i); + } else { + rv = EC_ERROR_INVAL; + } + } + } + } + + if (rv != EC_SUCCESS) + return rv; + + /* Check if the port is sourcing VBUS. */ + if (tcpm_get_src_ctrl(port)) { + CPRINTSUSB("Skip enable C%d", port); + return EC_ERROR_INVAL; + } + + CPRINTSUSB("New charge port: C%d", port); + + /* + * Turn off the other ports' sink path FETs, before enabling the + * requested charge port. + */ + for (i = 0; i < ppc_cnt; i++) { + if (i == port) + continue; + + if (ppc_vbus_sink_enable(i, 0)) + CPRINTSUSB("C%d: sink path disable failed.", i); + } + + /* Enable requested charge port. */ + if (ppc_vbus_sink_enable(port, 1)) { + CPRINTSUSB("C%d: sink path enable failed.", port); + return EC_ERROR_UNKNOWN; + } + + return EC_SUCCESS; +} + +void board_set_charge_limit(int port, int supplier, int charge_ma, int max_ma, + int charge_mv) +{ + charge_ma = (charge_ma * CONFIG_BOARD_INPUT_CURRENT_SCALE_FACTOR) / 100; + + charge_set_input_current_limit( + MAX(charge_ma, CONFIG_CHARGER_INPUT_CURRENT), charge_mv); +} + +void sbu_fault_interrupt(enum gpio_signal signal) +{ + int port = signal == IOEX_USB_C1_FAULT_ODL ? 1 : 0; + + CPRINTSUSB("C%d: SBU fault", port); + pd_handle_overcurrent(port); +} + +void usb_fault_interrupt(enum gpio_signal signal) +{ + int out; + + CPRINTSUSB("USB fault(%d), alerting the SoC", signal); + out = gpio_pin_get_dt( + GPIO_DT_FROM_NODELABEL(gpio_usb_hub_fault_q_odl)) && + gpio_pin_get_dt(GPIO_DT_FROM_NODELABEL(ioex_usb_a0_fault_odl)) && + gpio_pin_get_dt(GPIO_DT_FROM_NODELABEL(ioex_usb_a1_fault_db_odl)); + + gpio_pin_set_dt(GPIO_DT_FROM_NODELABEL(gpio_usb_fault_odl), out); +} + +void usb_pd_soc_interrupt(enum gpio_signal signal) +{ + /* + * This interrupt is unexpected with our use of the SoC mux, so just log + * it as a point of interest. + */ + CPRINTSUSB("SOC PD Interrupt"); +} + +#ifdef CONFIG_CHARGER_ISL9241 +/* Round up 3250 max current to multiple of 128mA for ISL9241 AC prochot. */ +#define SKYRIM_AC_PROCHOT_CURRENT_MA 3328 +static void set_ac_prochot(void) +{ + isl9241_set_ac_prochot(CHARGER_SOLO, SKYRIM_AC_PROCHOT_CURRENT_MA); +} +DECLARE_HOOK(HOOK_INIT, set_ac_prochot, HOOK_PRIO_DEFAULT); +#endif /* CONFIG_CHARGER_ISL9241 */ + +void tcpc_alert_event(enum gpio_signal signal) +{ + int port; + + switch (signal) { + case GPIO_USB_C0_TCPC_INT_ODL: + port = 0; + break; + case GPIO_USB_C1_TCPC_INT_ODL: + port = 1; + break; + default: + return; + } + + schedule_deferred_pd_interrupt(port); +} + +static void reset_nct38xx_port(int port) +{ + const struct gpio_dt_spec *reset_gpio_l; + const struct device *ioex_port0, *ioex_port1; + + /* TODO(b/225189538): Save and restore ioex signals */ + if (port == USBC_PORT_C0) { + reset_gpio_l = GPIO_DT_FROM_NODELABEL(gpio_usb_c0_tcpc_rst_l); + ioex_port0 = DEVICE_DT_GET(DT_NODELABEL(ioex_c0_port0)); + ioex_port1 = DEVICE_DT_GET(DT_NODELABEL(ioex_c0_port1)); + } else if (port == USBC_PORT_C1) { + reset_gpio_l = GPIO_DT_FROM_NODELABEL(gpio_usb_c1_tcpc_rst_l); + ioex_port0 = DEVICE_DT_GET(DT_NODELABEL(ioex_c1_port0)); + ioex_port1 = DEVICE_DT_GET(DT_NODELABEL(ioex_c1_port1)); + } else { + /* Invalid port: do nothing */ + return; + } + + gpio_pin_set_dt(reset_gpio_l, 0); + msleep(NCT38XX_RESET_HOLD_DELAY_MS); + gpio_pin_set_dt(reset_gpio_l, 1); + nct38xx_reset_notify(port); + if (NCT3807_RESET_POST_DELAY_MS != 0) + msleep(NCT3807_RESET_POST_DELAY_MS); + + /* Re-enable the IO expander pins */ + gpio_reset_port(ioex_port0); + gpio_reset_port(ioex_port1); +} + +void board_reset_pd_mcu(void) +{ + /* Reset TCPC0 */ + reset_nct38xx_port(USBC_PORT_C0); + + /* Reset TCPC1 */ + reset_nct38xx_port(USBC_PORT_C1); +} + +uint16_t tcpc_get_alert_status(void) +{ + uint16_t status = 0; + + /* + * Check which port has the ALERT line set and ignore if that TCPC has + * its reset line active. + */ + if (!gpio_pin_get_dt( + GPIO_DT_FROM_NODELABEL(gpio_usb_c0_tcpc_int_odl))) { + if (gpio_pin_get_dt(GPIO_DT_FROM_NODELABEL( + gpio_usb_c0_tcpc_rst_l)) != 0) + status |= PD_STATUS_TCPC_ALERT_0; + } + + if (!gpio_pin_get_dt( + GPIO_DT_FROM_NODELABEL(gpio_usb_c1_tcpc_int_odl))) { + if (gpio_pin_get_dt(GPIO_DT_FROM_NODELABEL( + gpio_usb_c1_tcpc_rst_l)) != 0) + status |= PD_STATUS_TCPC_ALERT_1; + } + + return status; +} + +void bc12_interrupt(enum gpio_signal signal) +{ + switch (signal) { + case GPIO_USB_C0_BC12_INT_ODL: + usb_charger_task_set_event(0, USB_CHG_EVENT_BC12); + break; + + case GPIO_USB_C1_BC12_INT_ODL: + usb_charger_task_set_event(1, USB_CHG_EVENT_BC12); + break; + + default: + break; + } +} + +/** + * Return if VBUS is sagging too low + * + * For legacy BC1.2 charging with CONFIG_CHARGE_RAMP_SW, ramp up input current + * until voltage drops to 4.5V. Don't go lower than this to be kind to the + * charger (see b/67964166). + */ +#define BC12_MIN_VOLTAGE 4500 +int board_is_vbus_too_low(int port, enum chg_ramp_vbus_state ramp_state) +{ + int voltage = 0; + int rv; + + rv = charger_get_vbus_voltage(port, &voltage); + + if (rv) { + CPRINTSUSB("%s rv=%d", __func__, rv); + return 0; + } + + /* + * b/168569046: The ISL9241 sometimes incorrectly reports 0 for unknown + * reason, causing ramp to stop at 0.5A. Workaround this by ignoring 0. + * This partly defeats the point of ramping, but will still catch + * VBUS below 4.5V and above 0V. + */ + if (voltage == 0) { + CPRINTSUSB("%s vbus=0", __func__); + return 0; + } + + if (voltage < BC12_MIN_VOLTAGE) + CPRINTSUSB("%s vbus=%d", __func__, voltage); + + return voltage < BC12_MIN_VOLTAGE; +} + +#define SAFE_RESET_VBUS_DELAY_MS 900 +#define SAFE_RESET_VBUS_MV 5000 +void board_hibernate(void) +{ + int port; + enum ec_error_list ret; + + /* + * If we are charging, then drop the Vbus level down to 5V to ensure + * that we don't get locked out of the 6.8V OVLO for our PPCs in + * dead-battery mode. This is needed when the TCPC/PPC rails go away. + * (b/79218851, b/143778351, b/147007265) + */ + port = charge_manager_get_active_charge_port(); + if (port != CHARGE_PORT_NONE) { + pd_request_source_voltage(port, SAFE_RESET_VBUS_MV); + + /* Give PD task and PPC chip time to get to 5V */ + msleep(SAFE_RESET_VBUS_DELAY_MS); + } + + /* Try to put our battery fuel gauge into sleep mode */ + ret = battery_sleep_fuel_gauge(); + if ((ret != EC_SUCCESS) && (ret != EC_ERROR_UNIMPLEMENTED)) + cprints(CC_SYSTEM, "Failed to send battery sleep command"); +} |