smihandler.c

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/* SPDX-License-Identifier: GPL-2.0-only */
 
#include <acpi/acpi.h>
#include <arch/io.h>
#include <console/console.h>
#include <cpu/x86/smm.h>
#include <soc/nvs.h>
#include <southbridge/intel/lynxpoint/pch.h>
#include <southbridge/intel/common/gpio.h>
#include <southbridge/intel/lynxpoint/me.h>
#include <northbridge/intel/haswell/haswell.h>
#include <cpu/intel/haswell/haswell.h>
#include <elog.h>
 
/* Include EC functions */
#include <ec/google/chromeec/ec.h>
#include "ec.h"
 
/* Codec enable: GPIO45 */
#define GPIO_PP3300_CODEC_EN 45
/* GPIO46 controls the WLAN_DISABLE_L signal. */
#define GPIO_WLAN_DISABLE_L 46
#define GPIO_LTE_DISABLE_L  59
 
static u8 mainboard_smi_ec(void)
{
        u8 cmd = google_chromeec_get_event();
        u32 pm1_cnt;
 
        /* Log this event */
        if (cmd)
                elog_gsmi_add_event_byte(ELOG_TYPE_EC_EVENT, cmd);
 
        switch (cmd) {
        case EC_HOST_EVENT_LID_CLOSED:
                printk(BIOS_DEBUG, "LID CLOSED, SHUTDOWN\n");
 
                /* Go to S5 */
                pm1_cnt = inl(get_pmbase() + PM1_CNT);
                pm1_cnt |= (0xf << 10);
                outl(pm1_cnt, get_pmbase() + PM1_CNT);
                break;
        }
 
        return cmd;
}
 
/* gpi_sts is GPIO 47:32 */
void mainboard_smi_gpi(u32 gpi_sts)
{
        if (gpi_sts & (1 << (EC_SMI_GPI - 32))) {
                /* Process all pending events */
                while (mainboard_smi_ec() != 0);
        }
}
 
void mainboard_smi_sleep(u8 slp_typ)
{
        /* Disable USB charging if required */
        switch (slp_typ) {
        case ACPI_S3:
                if (gnvs->s3u0 == 0)
                        google_chromeec_set_usb_charge_mode(
                                0, USB_CHARGE_MODE_DISABLED);
                if (gnvs->s3u1 == 0)
                        google_chromeec_set_usb_charge_mode(
                                1, USB_CHARGE_MODE_DISABLED);
 
                /* Prevent leak from standby rail to WLAN rail in S3. */
                set_gpio(GPIO_WLAN_DISABLE_L, 0);
                set_gpio(GPIO_PP3300_CODEC_EN, 0);
                /* Disable LTE */
                set_gpio(GPIO_LTE_DISABLE_L, 0);
 
                /* Enable wake events */
                google_chromeec_set_wake_mask(MAINBOARD_EC_S3_WAKE_EVENTS);
                break;
        case ACPI_S4:
        case ACPI_S5:
                if (gnvs->s5u0 == 0)
                        google_chromeec_set_usb_charge_mode(
                                0, USB_CHARGE_MODE_DISABLED);
                if (gnvs->s5u1 == 0)
                        google_chromeec_set_usb_charge_mode(
                                1, USB_CHARGE_MODE_DISABLED);
 
                /* Prevent leak from standby rail to WLAN rail in S5. */
                set_gpio(GPIO_WLAN_DISABLE_L, 0);
                set_gpio(GPIO_PP3300_CODEC_EN, 0);
                /* Disable LTE */
                set_gpio(GPIO_LTE_DISABLE_L, 0);
 
                /* Enable wake events */
                google_chromeec_set_wake_mask(MAINBOARD_EC_S5_WAKE_EVENTS);
                break;
        }
 
        /* Disable SCI and SMI events */
        google_chromeec_set_smi_mask(0);
        google_chromeec_set_sci_mask(0);
 
        /* Clear pending events that may trigger immediate wake */
        while (google_chromeec_get_event() != EC_HOST_EVENT_NONE)
                ;
}
 
int mainboard_smi_apmc(u8 apmc)
{
        switch (apmc) {
        case APM_CNT_ACPI_ENABLE:
                google_chromeec_set_smi_mask(0);
                /* Clear all pending events */
                while (google_chromeec_get_event() != EC_HOST_EVENT_NONE)
                        ;
                google_chromeec_set_sci_mask(MAINBOARD_EC_SCI_EVENTS);
                break;
        case APM_CNT_ACPI_DISABLE:
                google_chromeec_set_sci_mask(0);
                /* Clear all pending events */
                while (google_chromeec_get_event() != EC_HOST_EVENT_NONE)
                        ;
                google_chromeec_set_smi_mask(MAINBOARD_EC_SMI_EVENTS);
                break;
        }
        return 0;
}