chromeos.c

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/* SPDX-License-Identifier: GPL-2.0-only */
 
#include <bootmode.h>
#include <boot/coreboot_tables.h>
#include <device/pci_ops.h>
#include <console/console.h>
#include <device/device.h>
 
#include <southbridge/intel/bd82x6x/pch.h>
#include <southbridge/intel/common/gpio.h>
#include <types.h>
#include <vendorcode/google/chromeos/chromeos.h>
#include "ec.h"
#include <ec/quanta/it8518/ec.h>
#include "onboard.h"
 
void fill_lb_gpios(struct lb_gpios *gpios)
{
        struct lb_gpio chromeos_gpios[] = {
                /* Lid Switch: Virtual switch */
                {-1, ACTIVE_HIGH, get_lid_switch(), "lid"},
 
                /* Power Button: Virtual switch */
                /* Hard-code value to de-asserted */
                {-1, ACTIVE_HIGH, 0, "power"},
 
                /* Was VGA Option ROM loaded? */
                /* -1 indicates that this is a pseudo GPIO */
                {-1, ACTIVE_HIGH, gfx_get_init_done(), "oprom"},
 
                /* EC is in RW mode when it isn't in recovery mode. */
                {-1, ACTIVE_HIGH, !get_recovery_mode_switch(), "ec_in_rw"}
        };
        lb_add_gpios(gpios, chromeos_gpios, ARRAY_SIZE(chromeos_gpios));
}
 
int get_write_protect_state(void)
{
        return !get_gpio(GPIO_SPI_WP);
}
 
int get_lid_switch(void)
{
        /* hard-code to open */
        return 1;
}
 
/*
 * The recovery-switch is virtual on Stout and is handled via the EC.
 * Stout recovery mode is only valid if RTC_PWR_STS is set and the EC
 * indicated the recovery keys were pressed. We use a global flag for
 * rec_mode to be used after RTC_POWER_STS has been cleared.
 * Note, rec_mode is the only time the EC is in RO mode, otherwise, RW.
 */
int get_recovery_mode_switch(void)
{
        static int ec_in_rec_mode;
        static int ec_rec_flag_good;
 
        if (ec_rec_flag_good)
                return ec_in_rec_mode;
 
        const pci_devfn_t dev = PCI_DEV(0, 0x1f, 0);
        u8 reg8 = pci_s_read_config8(dev, GEN_PMCON_3);
 
        u8 ec_status = ec_read(EC_STATUS_REG);
 
        printk(BIOS_SPEW,"%s:  EC status:%#x   RTC_BAT: %x\n",
                        __func__, ec_status, reg8 & RTC_BATTERY_DEAD);
 
        ec_in_rec_mode = (((reg8 & RTC_BATTERY_DEAD) != 0) &&
                                ((ec_status & 0x3) == EC_IN_RECOVERY_MODE));
        ec_rec_flag_good = 1;
        return ec_in_rec_mode;
}
 
static const struct cros_gpio cros_gpios[] = {
        CROS_GPIO_REC_AH(CROS_GPIO_VIRTUAL, CROS_GPIO_DEVICE_NAME),
        CROS_GPIO_WP_AL(GPIO_SPI_WP, CROS_GPIO_DEVICE_NAME),
};
 
DECLARE_CROS_GPIOS(cros_gpios);