smihandler.c

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/* SPDX-License-Identifier: GPL-2.0-only */
 
#include <stdint.h>
#include <arch/io.h>
#include <cpu/x86/smm.h>
#include <superio/smsc/sch5545/sch5545.h>
 
int mainboard_smi_apmc(u8 data)
{
        u8 val;
        switch (data) {
        case APM_CNT_ACPI_ENABLE:
                /* Enable wake on PS2 */
                val = inb(SCH5545_RUNTIME_REG_BASE + SCH5545_RR_PME_EN1);
                val |= (SCH5545_KBD_PME_EN | SCH5545_MOUSE_PME_EN);
                outb(val, SCH5545_RUNTIME_REG_BASE + SCH5545_RR_PME_EN1);
                /* Clear pending and enable PMEs */
                outb(SCH5545_GLOBAL_PME_STS, SCH5545_RUNTIME_REG_BASE + SCH5545_RR_PME_STS);
                outb(SCH5545_GLOBAL_PME_EN, SCH5545_RUNTIME_REG_BASE + SCH5545_RR_PME_EN);
                break;
        case APM_CNT_ACPI_DISABLE:
                /* Disable wake on PS2 */
                val = inb(SCH5545_RUNTIME_REG_BASE + SCH5545_RR_PME_EN1);
                val &= ~(SCH5545_KBD_PME_EN | SCH5545_MOUSE_PME_EN);
                outb(val, SCH5545_RUNTIME_REG_BASE + SCH5545_RR_PME_EN1);
                /* Clear pending and disable PMEs */
                outb(SCH5545_GLOBAL_PME_STS, SCH5545_RUNTIME_REG_BASE + SCH5545_RR_PME_STS);
                outb(0, SCH5545_RUNTIME_REG_BASE + SCH5545_RR_PME_EN);
                break;
        default:
                break;
        }
        return 0;
}