chromeos.c

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/* SPDX-License-Identifier: GPL-2.0-only */
 
#include <bootmode.h>
#include <boot/coreboot_tables.h>
#include <gpio.h>
 
#include "board.h"
 
#define GPIO_WP         GPIO(7, A, 6)
#define GPIO_POWER      GPIO(0, A, 5)
#define GPIO_RECOVERY_SERVO     GPIO(0, B, 1)
#define GPIO_RECOVERY_PUSHKEY   GPIO(7, B, 1)
 
void setup_chromeos_gpios(void)
{
        gpio_input(GPIO_WP);
        gpio_input(GPIO_POWER);
        gpio_input_pullup(GPIO_RECOVERY_SERVO);
        gpio_input_pullup(GPIO_RECOVERY_PUSHKEY);
}
 
void fill_lb_gpios(struct lb_gpios *gpios)
{
        struct lb_gpio chromeos_gpios[] = {
                /* Note for early development, we want to support both servo
                 * and pushkey recovery buttons in firmware boot stages. */
                {GPIO_RECOVERY_PUSHKEY.raw, ACTIVE_LOW,
                        !get_recovery_mode_switch(), "presence"},
                {GPIO_POWER.raw, ACTIVE_LOW, -1, "power"},
                {GPIO_RESET.raw, ACTIVE_HIGH, -1, "reset"},
        };
        lb_add_gpios(gpios, chromeos_gpios, ARRAY_SIZE(chromeos_gpios));
}
 
int get_recovery_mode_switch(void)
{
        // Both RECOVERY_SERVO and RECOVERY_PUSHKEY are low active.
        return !(gpio_get(GPIO_RECOVERY_SERVO) &&
                 gpio_get(GPIO_RECOVERY_PUSHKEY));
}
 
int get_write_protect_state(void)
{
        return !gpio_get(GPIO_WP);
}
 
int get_ec_is_trusted(void)
{
        /* Do not have a Chrome EC involved in entering recovery mode;
           Always return trusted. */
        return 1;
}