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/*
* This file is part of the coreboot project.
*
* Copyright (C) 2008-2009 coresystems GmbH
*
* 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.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc.
*/
#include <arch/io.h>
#include <console/console.h>
#include <cpu/x86/smm.h>
#include <elog.h>
#include <ec/google/chromeec/ec.h>
#include "ec.h"
#include <soc/nvs.h>
#include <soc/pmc.h>
/* The wake gpio is SUS_GPIO[0]. */
#define WAKE_GPIO_EN SUS_GPIO_EN0
static uint8_t mainboard_smi_ec(void)
{
uint8_t cmd = google_chromeec_get_event();
uint16_t pmbase = get_pmbase();
uint32_t 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(pmbase + PM1_CNT);
pm1_cnt |= SLP_EN | (SLP_TYP_S5 << SLP_TYP_SHIFT);
outl(pm1_cnt, pmbase + PM1_CNT);
break;
}
return cmd;
}
/* The entire 32-bit ALT_GPIO_SMI register is passed as a parameter. Note, that
* this includes the enable bits in the lower 16 bits. */
void mainboard_smi_gpi(uint32_t alt_gpio_smi)
{
if (alt_gpio_smi & (1 << EC_SMI_GPI)) {
/* Process all pending events */
while (mainboard_smi_ec() != 0);
}
}
void mainboard_smi_sleep(uint8_t slp_typ)
{
/* Disable USB charging if required */
switch (slp_typ) {
case 3:
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);
/* Enable wake events */
google_chromeec_set_wake_mask(MAINBOARD_EC_S3_WAKE_EVENTS);
/* Enable wake pin in GPE block. */
enable_gpe(WAKE_GPIO_EN);
break;
case 5:
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);
/* 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);
}
int mainboard_smi_apmc(uint8_t apmc)
{
switch (apmc) {
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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