src/mainboard/google/stout/ec.c

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

#include <acpi/acpi.h>
#include <bootmode.h>
#include <types.h>
#include <console/console.h>
#include <ec/quanta/it8518/ec.h>
#include <device/device.h>
#include <southbridge/intel/bd82x6x/pch.h>
#include <southbridge/intel/common/pmbase.h>
#include "ec.h"

void stout_ec_init(void)
{

	printk(BIOS_DEBUG,"%s: EC FW version %x%x\n", __func__,
			ec_read(EC_FW_VER), ec_read(EC_FW_VER + 1));

	/*
	 *  Important: get_recovery_mode_switch() must be called in EC init.
	 */
	get_recovery_mode_switch();

	/* Unmute */
	ec_kbc_write_cmd(EC_KBD_CMD_UNMUTE);

	/*
	 * Set USB Power off in S3 (enabled in S3 path if requested in gnvs)
	 * Bit0 of 0x0D/Bit0 of 0x26
	 * 0/0 All USB port off
	 * 1/0 USB on, all USB port didn't support wake up
	 * 0/1 USB on, yellow port support wake up charge, but may not support
	 *             charge smart phone.
	 * 1/1 USB on, yellow port in AUTO mode and didn't support wake up system.
	 */
	ec_write(EC_PERIPH_CNTL_3, ec_read(EC_PERIPH_CNTL_3) & 0xE);
	ec_write(EC_USB_S3_EN, ec_read(EC_USB_S3_EN) & 0xE);

	// TODO: Power Limit Setting
}

void stout_ec_finalize_smm(void)
{
	u8 ec_reg, critical_shutdown = 0;

	/*
	 * Check EC for error conditions.
	 */

	/* Fan Error : Peripheral Status 3 (0x35) bit 4 */
	ec_reg = ec_read(EC_PERIPH_STAT_3);

	if (ec_reg & 0x8) {
		printk(BIOS_ERR, "  EC Fan Error\n");
		critical_shutdown = 1;
	}

	/* Thermal Device Error : Peripheral Status 3 (0x35) bit 8 */
	if (ec_reg & 0x80) {
		printk(BIOS_ERR, "  EC Thermal Device Error\n");
		critical_shutdown = 1;
	}

	/* Critical Battery Error */
	ec_reg = ec_read(EC_MBAT_STATUS);

	if ((ec_reg & 0xCF) == 0xC0) {
		printk(BIOS_ERR, "  EC Critical Battery Error\n");
		critical_shutdown = 1;
	}

	if ((ec_reg & 0x8F) == 0x8F) {
		printk(BIOS_ERR, "  EC Read Battery Error\n");
	}

	if (critical_shutdown) {
		printk(BIOS_ERR, "EC critical_shutdown");

		/* Go to S5 */
		write_pmbase32(PM1_CNT, read_pmbase32(PM1_CNT) | (0xf << 10));
	}
}