ec.c

Go to the documentation of this file.

/* SPDX-License-Identifier: GPL-2.0-only */
 
#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));
        }
}