src/mainboard/google/butterfly/chromeos.c

/* SPDX-License-Identifier: GPL-2.0-only */

#include <console/console.h>
#include <bootmode.h>
#include <boot/coreboot_tables.h>
#include <device/device.h>

#include <southbridge/intel/bd82x6x/pch.h>
#include <southbridge/intel/common/gpio.h>
#include <ec/quanta/ene_kb3940q/ec.h>
#include <vendorcode/google/chromeos/chromeos.h>
#include "ec.h"

#define WP_GPIO		6
#define DEVMODE_GPIO	54
#define FORCE_RECOVERY_MODE	0

void fill_lb_gpios(struct lb_gpios *gpios)
{
	struct lb_gpio chromeos_gpios[] = {
		/* lid switch value from EC */
		{-1, ACTIVE_HIGH, get_lid_switch(), "lid"},

		/* Power Button - Hardcode Low as power button may still be
		 * pressed when read here.*/
		{-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"},
	};
	lb_add_gpios(gpios, chromeos_gpios, ARRAY_SIZE(chromeos_gpios));
}

int get_write_protect_state(void)
{
	return !get_gpio(WP_GPIO);
}

int get_lid_switch(void)
{
	return (ec_mem_read(EC_HW_GPI_STATUS) >> EC_GPI_LID_STAT_BIT) & 1;
}

int get_recovery_mode_switch(void)
{
	int ec_rec_mode = 0;

	if (FORCE_RECOVERY_MODE) {
		printk(BIOS_DEBUG, "FORCING RECOVERY MODE.\n");
		return 1;
	}

	if (ENV_RAMSTAGE) {
		if (ec_mem_read(EC_CODE_STATE) == EC_COS_EC_RO)
			ec_rec_mode = 1;

		printk(BIOS_DEBUG, "RECOVERY MODE FROM EC: %x\n", ec_rec_mode);
	}

	return ec_rec_mode;
}

static const struct cros_gpio cros_gpios[] = {
	CROS_GPIO_REC_AH(CROS_GPIO_VIRTUAL, CROS_GPIO_DEVICE_NAME),
	CROS_GPIO_WP_AL(WP_GPIO, CROS_GPIO_DEVICE_NAME),
};

void mainboard_chromeos_acpi_generate(void)
{
	// TODO: MLR
	// The firmware read/write status is a "virtual" switch and
	// will be handled elsewhere.  Until then hard-code to
	// read/write instead of read-only for developer mode.
	if (CONFIG(CHROMEOS_NVS))
		chromeos_set_ecfw_rw();

	chromeos_acpi_gpio_generate(cros_gpios, ARRAY_SIZE(cros_gpios));
}