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/pmutil.h>
#include <southbridge/intel/common/pmbase.h>
#include <northbridge/intel/sandybridge/sandybridge.h>
#include <ec/compal/ene932/ec.h>
#include "ec.h"
 
static u8 mainboard_smi_ec(void)
{
        u8 src;
 
        ec_kbc_write_cmd(0x56);
        src = ec_kbc_read_ob();
        printk(BIOS_DEBUG, "%s src: %x\n", __func__, src);
 
        switch (src) {
        case EC_BATTERY_CRITICAL:
                break;
        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 src;
}
 
void mainboard_smi_gpi(u32 gpi_sts)
{
        if (gpi_sts & (1 << EC_SMI_GPI)) {
                /* Process all pending events from EC */
                do {} while (mainboard_smi_ec() != EC_NO_EVENT);
        } else if (gpi_sts & (1 << EC_LID_GPI)) {
                printk(BIOS_DEBUG, "LID CLOSED, SHUTDOWN\n");
 
                /* Go to S5 */
                write_pmbase32(PM1_CNT, read_pmbase32(PM1_CNT) | (0xf << 10));
        }
}
 
void mainboard_smi_sleep(u8 slp_typ)
{
        /* Disable SCI and SMI events */
 
        /* Clear pending events that may trigger immediate wake */
 
        /* Enable wake events */
 
        /* Tell the EC to Disable USB power */
        if (gnvs->s3u0 == 0 && gnvs->s3u1 == 0) {
                ec_kbc_write_cmd(0x45);
                ec_kbc_write_ib(0xF2);
        }
}
 
int mainboard_smi_apmc(u8 apmc)
{
        switch (apmc) {
        case APM_CNT_ACPI_ENABLE:
                /* Clear all pending events */
                /* EC cmd:59 data:E8 */
                ec_kbc_write_cmd(0x59);
                ec_kbc_write_ib(0xE8);
 
                /* Set LID GPI to generate SCIs */
                gpi_route_interrupt(EC_LID_GPI, GPI_IS_SCI);
                break;
        case APM_CNT_ACPI_DISABLE:
                /* Clear all pending events */
                /* EC cmd:59 data:e9 */
                ec_kbc_write_cmd(0x59);
                ec_kbc_write_ib(0xE9);
 
                /* Set LID GPI to generate SMIs */
                gpi_route_interrupt(EC_LID_GPI, GPI_IS_SMI);
                break;
        }
        return 0;
}