smihandler.c

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/* SPDX-License-Identifier: GPL-2.0-only */
 
#include <console/console.h>
#include <cpu/x86/smm.h>
#include <soc/nvs.h>
#include <southbridge/intel/bd82x6x/pch.h>
#include <southbridge/intel/bd82x6x/me.h>
#include <southbridge/intel/common/pmbase.h>
#include <northbridge/intel/sandybridge/sandybridge.h>
#include <ec/smsc/mec1308/ec.h>
#include "ec.h"
 
static u8 mainboard_smi_ec(void)
{
        u8 cmd;
 
        cmd = read_ec_command_byte(EC_GET_SMI_CAUSE);
 
        switch (cmd) {
        case EC_LID_CLOSE:
                printk(BIOS_DEBUG, "LID CLOSED, SHUTDOWN\n");
 
                /* Go to S5 */
                write_pmbase32(PM1_CNT, read_pmbase32(PM1_CNT) | (0xf << 10));
                break;
        }
 
        return cmd;
}
 
void mainboard_smi_gpi(u32 gpi_sts)
{
        if (gpi_sts & (1 << EC_SMI_GPI)) {
                /* Process all pending EC requests */
                ec_set_ports(EC_MAILBOX_PORT, EC_MAILBOX_PORT+1);
                while (mainboard_smi_ec() != 0xff);
 
                /* The EC may keep asserting SMI# for some
                 * period unless we kick it here.
                 */
                send_ec_command(EC_SMI_DISABLE);
                send_ec_command(EC_SMI_ENABLE);
        }
}
 
int mainboard_smi_apmc(u8 apmc)
{
        ec_set_ports(EC_MAILBOX_PORT, EC_MAILBOX_PORT+1);
 
        switch (apmc) {
        case 0xe1: /* ACPI ENABLE */
                send_ec_command(EC_SMI_DISABLE);
                send_ec_command(EC_ACPI_ENABLE);
                break;
 
        case 0x1e: /* ACPI DISABLE */
                send_ec_command(EC_SMI_ENABLE);
                send_ec_command(EC_ACPI_DISABLE);
                break;
        }
        return 0;
}