smihandler.c

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/* SPDX-License-Identifier: GPL-2.0-only */
 
#include <arch/io.h>
#include <console/console.h>
#include <cpu/x86/smm.h>
#include <southbridge/intel/common/pmutil.h>
#include <northbridge/intel/ironlake/ironlake.h>
#include <ec/acpi/ec.h>
#include <ec/lenovo/h8/h8.h>
#include <delay.h>
#include "dock.h"
 
#define GPE_EC_SCI      1
#define GPE_EC_WAKE     13
 
static void mainboard_smi_handle_ec_sci(void)
{
        u8 status = inb(EC_SC);
        u8 event;
 
        if (!(status & EC_SCI_EVT))
                return;
 
        event = ec_query();
        printk(BIOS_DEBUG, "EC event %#02x\n", event);
 
        switch (event) {
        case 0x18:
                /* Fn-F9 key */
        case 0x27:
                /* Power loss */
        case 0x50:
                /* Undock Key */
                ec_clr_bit(0x03, 2);
                dock_disconnect();
                break;
        case 0x37:
        case 0x58:
                /* Dock Event */
                ec_clr_bit(0x03, 2);
                mdelay(250);
                dock_connect();
                ec_set_bit(0x03, 2);
                /* set dock LED to indicate status */
                ec_write(0x0c, 0x09);
                ec_write(0x0c, 0x88);
                break;
        default:
                break;
        }
}
 
void mainboard_smi_gpi(u32 gpi_sts)
{
        if (gpi_sts & (1 << GPE_EC_SCI))
                mainboard_smi_handle_ec_sci();
}
 
int mainboard_smi_apmc(u8 data)
{
        switch (data) {
        case APM_CNT_ACPI_ENABLE:
                /* use 0x1600/0x1604 to prevent races with userspace */
                ec_set_ports(0x1604, 0x1600);
                /* route H8SCI to SCI */
                gpi_route_interrupt(GPE_EC_SCI, GPI_IS_SCI);
                /* discard all events, and enable attention */
                ec_write(0x80, 0x01);
                break;
        case APM_CNT_ACPI_DISABLE:
                /* we have to use port 0x62/0x66, as 0x1600/0x1604 doesn't
                   provide a EC query function */
                ec_set_ports(0x66, 0x62);
                /* route H8SCI# to SMI */
                gpi_route_interrupt(GPE_EC_SCI, GPI_IS_SMI);
                /* discard all events, and enable attention */
                ec_write(0x80, 0x01);
                break;
        default:
                break;
        }
        return 0;
}
 
void mainboard_smi_sleep(u8 slp_typ)
{
        if (slp_typ == 3) {
                u8 ec_wake = ec_read(0x32);
                /* If EC wake events are enabled, enable wake on EC WAKE GPE. */
                if (ec_wake & 0x14) {
                        /* Redirect EC WAKE GPE to SCI. */
                        gpi_route_interrupt(GPE_EC_WAKE, GPI_IS_SCI);
                }
        }
}