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/* SPDX-License-Identifier: GPL-2.0-only */
#include <acpi/acpi.h>
#include <arch/io.h>
#include <device/mmio.h>
#include <console/console.h>
#include <cpu/x86/smm.h>
#include "ec.h"
#include <ec/google/chromeec/ec.h>
#include <ec/google/chromeec/smm.h>
#include <elog.h>
#include <soc/nvs.h>
#include <soc/pm.h>
#include <soc/gpio.h>
#include <variant/onboard.h>
/* The wake gpio is SUS_GPIO[0]. */
#define WAKE_GPIO_EN SUS_GPIO_EN0
#define GPIO_SUS7_WAKE_MASK (1 << 12)
#define GPIO_SUS1_WAKE_MASK (1 << 13)
static uint8_t mainboard_smi_ec(void)
{
uint8_t cmd = google_chromeec_get_event();
uint16_t pmbase = get_pmbase();
uint32_t 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(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)
{
void *addr;
uint32_t mask;
/* 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);
/* 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 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);
/* Enable wake events */
google_chromeec_set_wake_mask(MAINBOARD_EC_S5_WAKE_EVENTS);
/* Disabling wake from SUS_GPIO1 (TOUCH INT) and
* SUS_GPIO7 (TRACKPAD INT) in North bank as they are not
* valid S5 wake sources
*/
addr = (void *)(IO_BASE_ADDRESS + COMMUNITY_OFFSET_GPNORTH +
GPIO_WAKE_MASK_REG0);
mask = ~(GPIO_SUS1_WAKE_MASK | GPIO_SUS7_WAKE_MASK);
write32(addr, read32(addr) & mask);
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)
;
/* Set LPC lines to low power in S3/S5. */
if ((slp_typ == ACPI_S3) || (slp_typ == ACPI_S5)) {
lpc_set_low_power();
}
}
int mainboard_smi_apmc(uint8_t apmc)
{
chromeec_smi_apmc(apmc, MAINBOARD_EC_SCI_EVENTS, MAINBOARD_EC_SMI_EVENTS);
return 0;
}
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