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/*
* This file is part of the coreboot project.
*
* Copyright (C) 2008-2009 coresystems GmbH
* Copyright 2012 Google Inc.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include <arch/acpi.h>
#include <arch/io.h>
#include <console/console.h>
#include <cpu/x86/smm.h>
#include <southbridge/intel/lynxpoint/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"
/* 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;
#if CONFIG_ELOG_GSMI
/* Log this event */
if (cmd)
elog_add_event_byte(ELOG_TYPE_EC_EVENT, cmd);
#endif
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 (smm_get_gnvs()->s3u0 == 0)
google_chromeec_set_usb_charge_mode(
0, USB_CHARGE_MODE_DISABLED);
if (smm_get_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);
/* 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_S5:
if (smm_get_gnvs()->s5u0 == 0)
google_chromeec_set_usb_charge_mode(
0, USB_CHARGE_MODE_DISABLED);
if (smm_get_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);
/* 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() != 0);
}
static int mainboard_finalized = 0;
int mainboard_smi_apmc(u8 apmc)
{
switch (apmc) {
case APM_CNT_FINALIZE:
if (mainboard_finalized) {
printk(BIOS_DEBUG, "SMI#: Already finalized\n");
return 0;
}
intel_pch_finalize_smm();
intel_northbridge_haswell_finalize_smm();
intel_cpu_haswell_finalize_smm();
mainboard_finalized = 1;
break;
case APM_CNT_ACPI_ENABLE:
google_chromeec_set_smi_mask(0);
/* Clear all pending events */
while (google_chromeec_get_event() != 0);
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() != 0);
google_chromeec_set_smi_mask(MAINBOARD_EC_SMI_EVENTS);
break;
}
return 0;
}
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