smihandler.c

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/* SPDX-License-Identifier: GPL-2.0-only */
 
#include <device/pci_ops.h>
#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 functions */
#include <ec/quanta/it8518/ec.h>
#include "ec.h"
 
static u8 mainboard_smi_ec(void)
{
        u8 cmd = ec_it8518_get_event();
 
        switch (cmd) {
        case EC_SMI_LID_CLOSED:
                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 events */
                while (mainboard_smi_ec() != 0);
        }
}
 
void mainboard_smi_sleep(u8 slp_typ)
{
        /*
         * Tell the EC to Enable USB power for S3 if requested.
         * 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.
         */
        if (gnvs->s3u0 != 0 || gnvs->s3u1 != 0) {
                ec_write(EC_PERIPH_CNTL_3, ec_read(EC_PERIPH_CNTL_3) | 0x00);
                ec_write(EC_USB_S3_EN, ec_read(EC_USB_S3_EN) | 0x01);
                printk(BIOS_DEBUG, "USB wake from S3 enabled.\n");
        } else {
                /*
                 * If USB charging in suspend is disabled then also disable
                 * the XHCI PME to prevent wake when the port power is cut
                 * after the transition into suspend.
                 */
                if (gnvs->xhci) {
                        u32 reg32 = pci_read_config32(PCH_XHCI_DEV, 0x74);
                        reg32 &= ~(1 << 8); /* disable PME */
                        reg32 |= (1 << 15); /* clear PME status */
                        pci_write_config32(PCH_XHCI_DEV, 0x74, reg32);
                }
        }
 
        ec_kbc_write_cmd(EC_KBD_CMD_MUTE);
        ec_it8518_enable_wake_events();
}
 
int mainboard_smi_apmc(u8 apmc)
{
        switch (apmc) {
        case APM_CNT_FINALIZE:
                stout_ec_finalize_smm();
                break;
        case APM_CNT_ACPI_ENABLE:
                /*
                 * TODO(kimarie) Clear all pending events and enable SCI.
                 */
                ec_write_cmd(EC_CMD_NOTIFY_ACPI_ENTER);
                break;
        case APM_CNT_ACPI_DISABLE:
                /*
                 * TODO(kimarie) Clear all pending events and enable SMI.
                 */
                ec_write_cmd(EC_CMD_NOTIFY_ACPI_EXIT);
                break;
        }
        return 0;
}