diff options
Diffstat (limited to 'zephyr/projects/nissa/nereid/src/usbc.c')
-rw-r--r-- | zephyr/projects/nissa/nereid/src/usbc.c | 393 |
1 files changed, 0 insertions, 393 deletions
diff --git a/zephyr/projects/nissa/nereid/src/usbc.c b/zephyr/projects/nissa/nereid/src/usbc.c deleted file mode 100644 index 48f7cfd9cb..0000000000 --- a/zephyr/projects/nissa/nereid/src/usbc.c +++ /dev/null @@ -1,393 +0,0 @@ -/* Copyright 2022 The ChromiumOS Authors - * Use of this source code is governed by a BSD-style license that can be - * found in the LICENSE file. - */ - -#include <zephyr/logging/log.h> -#include <ap_power/ap_power.h> - -#include "charge_state_v2.h" -#include "chipset.h" -#include "hooks.h" -#include "usb_mux.h" -#include "system.h" -#include "driver/charger/sm5803.h" -#include "driver/tcpm/it83xx_pd.h" -#include "driver/tcpm/ps8xxx_public.h" -#include "driver/tcpm/tcpci.h" - -#include "nissa_common.h" - -LOG_MODULE_DECLARE(nissa, CONFIG_NISSA_LOG_LEVEL); - -struct tcpc_config_t tcpc_config[CONFIG_USB_PD_PORT_MAX_COUNT] = { - { - .bus_type = EC_BUS_TYPE_EMBEDDED, - /* TCPC is embedded within EC so no i2c config needed */ - .drv = &it8xxx2_tcpm_drv, - /* Alert is active-low, push-pull */ - .flags = 0, - }, - { - /* - * Sub-board: optional PS8745 TCPC+redriver. Behaves the same - * as PS8815. - */ - .bus_type = EC_BUS_TYPE_I2C, - .i2c_info = { - .port = I2C_PORT_USB_C1_TCPC, - .addr_flags = PS8XXX_I2C_ADDR1_FLAGS, - }, - .drv = &ps8xxx_tcpm_drv, - /* PS8745 implements TCPCI 2.0 */ - .flags = TCPC_FLAGS_TCPCI_REV2_0, - }, -}; - -/* Vconn control for integrated ITE TCPC */ -void board_pd_vconn_ctrl(int port, enum usbpd_cc_pin cc_pin, int enabled) -{ - /* Vconn control is only for port 0 */ - if (port) - return; - - if (cc_pin == USBPD_CC_PIN_1) - gpio_pin_set_dt( - GPIO_DT_FROM_NODELABEL(gpio_en_usb_c0_cc1_vconn), - !!enabled); - else - gpio_pin_set_dt( - GPIO_DT_FROM_NODELABEL(gpio_en_usb_c0_cc2_vconn), - !!enabled); -} - -__override bool pd_check_vbus_level(int port, enum vbus_level level) -{ - return sm5803_check_vbus_level(port, level); -} - -/* - * Putting chargers into LPM when in suspend reduces power draw by about 8mW - * per charger, but also seems critical to correct operation in source mode: - * if chargers are not in LPM when a sink is first connected, VBUS sourcing - * works even if the partner is later removed (causing LPM entry) and - * reconnected (causing LPM exit). If in LPM initially, sourcing VBUS - * consistently causes the charger to report (apparently spurious) overcurrent - * failures. - * - * In short, this is important to making things work correctly but we don't - * understand why. - */ -static void board_chargers_suspend(struct ap_power_ev_callback *const cb, - const struct ap_power_ev_data data) -{ - void (*fn)(int chgnum); - - switch (data.event) { - case AP_POWER_SUSPEND: - fn = sm5803_enable_low_power_mode; - break; - case AP_POWER_RESUME: - fn = sm5803_disable_low_power_mode; - break; - default: - LOG_WRN("%s: power event %d is not recognized", __func__, - data.event); - return; - } - - fn(CHARGER_PRIMARY); - if (board_get_charger_chip_count() > 1) - fn(CHARGER_SECONDARY); -} - -static int board_chargers_suspend_init(const struct device *unused) -{ - static struct ap_power_ev_callback cb = { - .handler = board_chargers_suspend, - .events = AP_POWER_SUSPEND | AP_POWER_RESUME, - }; - ap_power_ev_add_callback(&cb); - return 0; -} -SYS_INIT(board_chargers_suspend_init, APPLICATION, 0); - -int board_set_active_charge_port(int port) -{ - int is_real_port = (port >= 0 && port < board_get_usb_pd_port_count()); - int i; - int old_port; - int rv; - - if (!is_real_port && port != CHARGE_PORT_NONE) - return EC_ERROR_INVAL; - - old_port = charge_manager_get_active_charge_port(); - LOG_INF("Charge update: p%d -> p%d", old_port, port); - - /* Check if port is sourcing VBUS. */ - if (port != CHARGE_PORT_NONE && charger_is_sourcing_otg_power(port)) { - LOG_WRN("Skip enable p%d: already sourcing", port); - return EC_ERROR_INVAL; - } - - /* Disable sinking on all ports except the desired one */ - for (i = 0; i < board_get_usb_pd_port_count(); i++) { - if (i == port) - continue; - - if (sm5803_vbus_sink_enable(i, 0)) - /* - * Do not early-return because this can fail during - * power-on which would put us into a loop. - */ - LOG_WRN("p%d: sink path disable failed.", i); - } - - /* Don't enable anything (stop here) if no ports were requested */ - if ((port == CHARGE_PORT_NONE) || (old_port == port)) - return EC_SUCCESS; - - /* - * Stop the charger IC from switching while changing ports. Otherwise, - * we can overcurrent the adapter we're switching to. (crbug.com/926056) - */ - if (old_port != CHARGE_PORT_NONE) - charger_discharge_on_ac(1); - - /* Enable requested charge port. */ - rv = sm5803_vbus_sink_enable(port, 1); - if (rv) - LOG_WRN("p%d: sink path enable failed: code %d", port, rv); - - /* Allow the charger IC to begin/continue switching. */ - charger_discharge_on_ac(0); - - return rv; -} - -uint16_t tcpc_get_alert_status(void) -{ - /* - * TCPC 0 is embedded in the EC and processes interrupts in the chip - * code (it83xx/intc.c). This function only needs to poll port C1 if - * present. - */ - uint16_t status = 0; - int regval; - - /* Is the C1 port present and its IRQ line asserted? */ - if (board_get_usb_pd_port_count() == 2 && - !gpio_pin_get_dt(GPIO_DT_FROM_ALIAS(gpio_usb_c1_int_odl))) { - /* - * C1 IRQ is shared between BC1.2 and TCPC; poll TCPC to see if - * it asserted the IRQ. - */ - if (!tcpc_read16(1, TCPC_REG_ALERT, ®val)) { - if (regval) - status = PD_STATUS_TCPC_ALERT_1; - } - } - - return status; -} - -void pd_power_supply_reset(int port) -{ - int prev_en; - - if (port < 0 || port >= board_get_usb_pd_port_count()) - return; - - prev_en = charger_is_sourcing_otg_power(port); - - /* Disable Vbus */ - charger_enable_otg_power(port, 0); - - /* Discharge Vbus if previously enabled */ - if (prev_en) - sm5803_set_vbus_disch(port, 1); - - /* Notify host of power info change. */ - pd_send_host_event(PD_EVENT_POWER_CHANGE); -} - -int pd_set_power_supply_ready(int port) -{ - enum ec_error_list rv; - - if (port < 0 || port > board_get_usb_pd_port_count()) { - LOG_WRN("Port C%d does not exist, cannot enable VBUS", port); - return EC_ERROR_INVAL; - } - - /* Disable sinking */ - rv = sm5803_vbus_sink_enable(port, 0); - if (rv) { - LOG_WRN("C%d failed to disable sinking: %d", port, rv); - return rv; - } - - /* Disable Vbus discharge */ - rv = sm5803_set_vbus_disch(port, 0); - if (rv) { - LOG_WRN("C%d failed to clear VBUS discharge: %d", port, rv); - return rv; - } - - /* Provide Vbus */ - rv = charger_enable_otg_power(port, 1); - if (rv) { - LOG_WRN("C%d failed to enable VBUS sourcing: %d", port, rv); - return rv; - } - - /* Notify host of power info change. */ - pd_send_host_event(PD_EVENT_POWER_CHANGE); - - return EC_SUCCESS; -} - -__override void typec_set_source_current_limit(int port, enum tcpc_rp_value rp) -{ - int rv; - const int current = rp == TYPEC_RP_3A0 ? 3000 : 1500; - - rv = charger_set_otg_current_voltage(port, current, 5000); - if (rv != EC_SUCCESS) { - LOG_WRN("Failed to set source ilimit on port %d to %d: %d", - port, current, rv); - } -} - -void board_reset_pd_mcu(void) -{ - /* - * Do nothing. The integrated TCPC for C0 lacks a dedicated reset - * command, and C1 (if present) doesn't have a reset pin connected - * to the EC. - */ -} - -#define INT_RECHECK_US 5000 - -/* C0 interrupt line shared by BC 1.2 and charger */ - -static void check_c0_line(void); -DECLARE_DEFERRED(check_c0_line); - -static void notify_c0_chips(void) -{ - usb_charger_task_set_event(0, USB_CHG_EVENT_BC12); - sm5803_interrupt(0); -} - -static void check_c0_line(void) -{ - /* - * If line is still being held low, see if there's more to process from - * one of the chips - */ - if (!gpio_pin_get_dt(GPIO_DT_FROM_NODELABEL(gpio_usb_c0_int_odl))) { - notify_c0_chips(); - hook_call_deferred(&check_c0_line_data, INT_RECHECK_US); - } -} - -void usb_c0_interrupt(enum gpio_signal s) -{ - /* Cancel any previous calls to check the interrupt line */ - hook_call_deferred(&check_c0_line_data, -1); - - /* Notify all chips using this line that an interrupt came in */ - notify_c0_chips(); - - /* Check the line again in 5ms */ - hook_call_deferred(&check_c0_line_data, INT_RECHECK_US); -} - -/* C1 interrupt line shared by BC 1.2, TCPC, and charger */ -static void check_c1_line(void); -DECLARE_DEFERRED(check_c1_line); - -static void notify_c1_chips(void) -{ - schedule_deferred_pd_interrupt(1); - usb_charger_task_set_event(1, USB_CHG_EVENT_BC12); - /* Charger is handled in board_process_pd_alert */ -} - -static void check_c1_line(void) -{ - /* - * If line is still being held low, see if there's more to process from - * one of the chips. - */ - if (!gpio_pin_get_dt(GPIO_DT_FROM_ALIAS(gpio_usb_c1_int_odl))) { - notify_c1_chips(); - hook_call_deferred(&check_c1_line_data, INT_RECHECK_US); - } -} - -void usb_c1_interrupt(enum gpio_signal s) -{ - /* Cancel any previous calls to check the interrupt line */ - hook_call_deferred(&check_c1_line_data, -1); - - /* Notify all chips using this line that an interrupt came in */ - notify_c1_chips(); - - /* Check the line again in 5ms */ - hook_call_deferred(&check_c1_line_data, INT_RECHECK_US); -} - -/* - * Check state of IRQ lines at startup, ensuring an IRQ that happened before - * the EC started up won't get lost (leaving the IRQ line asserted and blocking - * any further interrupts on the port). - * - * Although the PD task will check for pending TCPC interrupts on startup, - * the charger sharing the IRQ will not be polled automatically. - */ -void board_handle_initial_typec_irq(void) -{ - check_c0_line(); - if (board_get_usb_pd_port_count() == 2) - check_c1_line(); -} -/* - * This must run after sub-board detection (which happens in EC main()), - * but isn't depended on by anything else either. - */ -DECLARE_HOOK(HOOK_INIT, board_handle_initial_typec_irq, HOOK_PRIO_LAST); - -/* - * Handle charger interrupts in the PD task. Not doing so can lead to a priority - * inversion where we fail to respond to TCPC alerts quickly enough because we - * don't get another edge on a shared IRQ until the charger interrupt is cleared - * (or the IRQ is polled again), which happens in the low-priority charger task: - * the high-priority type-C handler is thus blocked on the lower-priority - * charger. - * - * To avoid that, we run charger interrupts at the same priority. - */ -void board_process_pd_alert(int port) -{ - /* - * Port 0 doesn't use an external TCPC, so its interrupts don't need - * this special handling. - */ - if (port == 1 && - !gpio_pin_get_dt(GPIO_DT_FROM_ALIAS(gpio_usb_c1_int_odl))) { - sm5803_handle_interrupt(port); - } -} - -int pd_snk_is_vbus_provided(int port) -{ - int chg_det = 0; - - sm5803_get_chg_det(port, &chg_det); - - return chg_det; -} |