diff options
Diffstat (limited to 'zephyr/projects/nissa/pujjo/src/usbc.c')
| -rw-r--r-- | zephyr/projects/nissa/pujjo/src/usbc.c | 242 |
1 files changed, 242 insertions, 0 deletions
diff --git a/zephyr/projects/nissa/pujjo/src/usbc.c b/zephyr/projects/nissa/pujjo/src/usbc.c new file mode 100644 index 0000000000..5d3d94c243 --- /dev/null +++ b/zephyr/projects/nissa/pujjo/src/usbc.c @@ -0,0 +1,242 @@ +/* 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 "charge_state_v2.h" +#include "chipset.h" +#include "hooks.h" +#include "usb_mux.h" +#include "system.h" +#include "driver/charger/isl923x_public.h" +#include "driver/retimer/anx7483_public.h" +#include "driver/tcpm/tcpci.h" +#include "driver/tcpm/raa489000.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_I2C, + .i2c_info = { + .port = I2C_PORT_USB_C0_TCPC, + .addr_flags = RAA489000_TCPC0_I2C_FLAGS, + }, + .drv = &raa489000_tcpm_drv, + /* RAA489000 implements TCPCI 2.0 */ + .flags = TCPC_FLAGS_TCPCI_REV2_0 | + TCPC_FLAGS_VBUS_MONITOR, + }, +}; + +int board_is_sourcing_vbus(int port) +{ + int regval; + + tcpc_read(port, TCPC_REG_POWER_STATUS, ®val); + return !!(regval & TCPC_REG_POWER_STATUS_SOURCING_VBUS); +} + +int board_set_active_charge_port(int port) +{ + int is_real_port = (port >= 0 && port < CONFIG_USB_PD_PORT_MAX_COUNT); + int i; + int old_port; + + if (!is_real_port && port != CHARGE_PORT_NONE) + return EC_ERROR_INVAL; + + old_port = charge_manager_get_active_charge_port(); + + LOG_INF("New chg p%d", port); + + /* Disable all ports. */ + if (port == CHARGE_PORT_NONE) { + for (i = 0; i < CONFIG_USB_PD_PORT_MAX_COUNT; i++) { + tcpc_write(i, TCPC_REG_COMMAND, + TCPC_REG_COMMAND_SNK_CTRL_LOW); + raa489000_enable_asgate(i, false); + } + + return EC_SUCCESS; + } + + /* Check if port is sourcing VBUS. */ + if (board_is_sourcing_vbus(port)) { + LOG_WRN("Skip enable p%d", port); + return EC_ERROR_INVAL; + } + + /* + * Turn off the other ports' sink path FETs, before enabling the + * requested charge port. + */ + for (i = 0; i < CONFIG_USB_PD_PORT_MAX_COUNT; i++) { + if (i == port) + continue; + + if (tcpc_write(i, TCPC_REG_COMMAND, + TCPC_REG_COMMAND_SNK_CTRL_LOW)) + LOG_WRN("p%d: sink path disable failed.", i); + raa489000_enable_asgate(i, false); + } + + /* + * 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. */ + if (raa489000_enable_asgate(port, true) || + tcpc_write(port, TCPC_REG_COMMAND, + TCPC_REG_COMMAND_SNK_CTRL_HIGH)) { + LOG_WRN("p%d: sink path enable failed.", port); + charger_discharge_on_ac(0); + return EC_ERROR_UNKNOWN; + } + + /* Allow the charger IC to begin/continue switching. */ + charger_discharge_on_ac(0); + + return EC_SUCCESS; +} + +uint16_t tcpc_get_alert_status(void) +{ + uint16_t status = 0; + int regval; + + /* + * The interrupt line is shared between the TCPC and BC1.2 detector IC. + * Therefore, go out and actually read the alert registers to report the + * alert status. + */ + if (!gpio_pin_get_dt(GPIO_DT_FROM_NODELABEL(gpio_usb_c0_int_odl))) { + if (!tcpc_read16(0, TCPC_REG_ALERT, ®val)) { + /* The TCPCI Rev 1.0 spec says to ignore bits 14:12. */ + if (!(tcpc_config[0].flags & TCPC_FLAGS_TCPCI_REV2_0)) + regval &= ~((1 << 14) | (1 << 13) | (1 << 12)); + + if (regval) + status |= PD_STATUS_TCPC_ALERT_0; + } + } + return status; +} + +void pd_power_supply_reset(int port) +{ + /* Disable VBUS */ + tcpc_write(port, TCPC_REG_COMMAND, TCPC_REG_COMMAND_SRC_CTRL_LOW); + + /* Notify host of power info change. */ + pd_send_host_event(PD_EVENT_POWER_CHANGE); +} + +__override void typec_set_source_current_limit(int port, enum tcpc_rp_value rp) +{ + if (port < 0 || port >= CONFIG_USB_PD_PORT_MAX_COUNT) + return; + + raa489000_set_output_current(port, rp); +} + +int pd_set_power_supply_ready(int port) +{ + int rv; + + if (port >= CONFIG_USB_PD_PORT_MAX_COUNT) + return EC_ERROR_INVAL; + + /* Disable charging. */ + rv = tcpc_write(port, TCPC_REG_COMMAND, TCPC_REG_COMMAND_SNK_CTRL_LOW); + if (rv) + return rv; + + /* Our policy is not to source VBUS when the AP is off. */ + if (chipset_in_state(CHIPSET_STATE_ANY_OFF)) + return EC_ERROR_NOT_POWERED; + + /* Provide Vbus. */ + rv = tcpc_write(port, TCPC_REG_COMMAND, TCPC_REG_COMMAND_SRC_CTRL_HIGH); + if (rv) + return rv; + + rv = raa489000_enable_asgate(port, true); + if (rv) + return rv; + + /* Notify host of power info change. */ + pd_send_host_event(PD_EVENT_POWER_CHANGE); + + return EC_SUCCESS; +} + +void board_reset_pd_mcu(void) +{ + /* + * TODO(b:147316511): could send a reset command to the TCPC here + * if needed. + */ +} + +/* + * Because the TCPCs and BC1.2 chips share interrupt lines, it's possible + * for an interrupt to be lost if one asserts the IRQ, the other does the same + * then the first releases it: there will only be one falling edge to trigger + * the interrupt, and the line will be held low. We handle this by running a + * deferred check after a falling edge to see whether the IRQ is still being + * asserted. If it is, we assume an interrupt may have been lost and we need + * to poll each chip for events again. + */ +#define USBC_INT_POLL_DELAY_US 5000 + +static void poll_c0_int(void); +DECLARE_DEFERRED(poll_c0_int); + +static void usbc_interrupt_trigger(int port) +{ + schedule_deferred_pd_interrupt(port); + usb_charger_task_set_event(port, USB_CHG_EVENT_BC12); +} + +static inline void poll_usb_gpio(int port, const struct gpio_dt_spec *gpio, + const struct deferred_data *ud) +{ + if (!gpio_pin_get_dt(gpio)) { + usbc_interrupt_trigger(port); + hook_call_deferred(ud, USBC_INT_POLL_DELAY_US); + } +} + +static void poll_c0_int(void) +{ + poll_usb_gpio(0, GPIO_DT_FROM_NODELABEL(gpio_usb_c0_int_odl), + &poll_c0_int_data); +} + +void usb_interrupt(enum gpio_signal signal) +{ + int port; + const struct deferred_data *ud; + + if (signal == GPIO_SIGNAL(DT_NODELABEL(gpio_usb_c0_int_odl))) { + port = 0; + ud = &poll_c0_int_data; + } + /* + * We've just been called from a falling edge, so there's definitely + * no lost IRQ right now. Cancel any pending check. + */ + hook_call_deferred(ud, -1); + /* Trigger polling of TCPC and BC1.2 in respective tasks */ + usbc_interrupt_trigger(port); + /* Check for lost interrupts in a bit */ + hook_call_deferred(ud, USBC_INT_POLL_DELAY_US); +} |