/**
* @brief read and clear GPE0_STS
* @return GPE0_STS register
*/
u64 reset_gpe0_status(void)
{
u32 reg_h, reg_l;
reg_l = read_pmbase32(GPE0_STS);
reg_h = read_pmbase32(GPE0_STS + 4);
/* set status bits are cleared by writing 1 to them */
write_pmbase32(GPE0_STS, reg_l);
write_pmbase32(GPE0_STS + 4, reg_h);
return (((u64)reg_h) << 32) | reg_l;
}
/**
* @brief read and clear TCOx_STS
* @return TCOx_STS registers
*/
u32 reset_tco_status(void)
{
u32 reg32;
reg32 = read_pmbase32(TCO1_STS);
/*
* set status bits are cleared by writing 1 to them, but don't
* clear BOOT_STS before SECOND_TO_STS.
*/
write_pmbase32(TCO1_STS, reg32 & ~BOOT_STS);
if (reg32 & BOOT_STS)
write_pmbase32(TCO1_STS, BOOT_STS);
return reg32;
}
static u8 mainboard_smi_ec(void)
{
u8 src;
#if CONFIG(ELOG_GSMI)
static int battery_critical_logged;
#endif
ec_kbc_write_cmd(0x56);
src = ec_kbc_read_ob();
printk(BIOS_DEBUG, "mainboard_smi_ec src: %x\n", src);
switch (src) {
case EC_BATTERY_CRITICAL:
#if CONFIG(ELOG_GSMI)
if (!battery_critical_logged)
elog_add_event_byte(ELOG_TYPE_EC_EVENT,
EC_EVENT_BATTERY_CRITICAL);
battery_critical_logged = 1;
#endif
break;
case EC_LID_CLOSE:
printk(BIOS_DEBUG, "LID CLOSED, SHUTDOWN\n");
#if CONFIG(ELOG_GSMI)
elog_add_event_byte(ELOG_TYPE_EC_EVENT, EC_EVENT_LID_CLOSED);
#endif
/* Go to S5 */
write_pmbase32(PM1_CNT, read_pmbase32(PM1_CNT) | (0xf << 10));
break;
}
return src;
}
void gpe0_mask(u32 clr, u32 set)
{
u32 gpe0 = read_pmbase32(GPE0_EN);
gpe0 &= ~clr;
gpe0 |= set;
write_pmbase32(GPE0_EN, gpe0);
}
/**
* @brief read and clear SMI_STS
* @return SMI_STS register
*/
u32 reset_smi_status(void)
{
u32 reg32;
reg32 = read_pmbase32(SMI_STS);
/* set status bits are cleared by writing 1 to them */
write_pmbase32(SMI_STS, reg32);
return reg32;
}
void mainboard_smi_gpi(u32 gpi_sts)
{
printk(BIOS_DEBUG, "mainboard_smi_gpi: %x\n", gpi_sts);
if (gpi_sts & (1 << EC_SMI_GPI)) {
/* Process all pending events from EC */
while (mainboard_smi_ec() != EC_NO_EVENT);
}
else if (gpi_sts & (1 << EC_LID_GPI)) {
printk(BIOS_DEBUG, "LID CLOSED, SHUTDOWN\n");
#if CONFIG(ELOG_GSMI)
elog_add_event_byte(ELOG_TYPE_EC_EVENT, EC_EVENT_LID_CLOSED);
#endif
/* Go to S5 */
write_pmbase32(PM1_CNT, read_pmbase32(PM1_CNT) | (0xf << 10));
}
}
static u8 mainboard_smi_ec(void)
{
u8 cmd = google_chromeec_get_event();
#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 */
write_pmbase32(PM1_CNT, read_pmbase32(PM1_CNT) | (0xf << 10));
break;
}
return cmd;
}