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-rw-r--r--src/soc/intel/cannonlake/pmc.c70
1 files changed, 69 insertions, 1 deletions
diff --git a/src/soc/intel/cannonlake/pmc.c b/src/soc/intel/cannonlake/pmc.c
index 6ec4d389e5..cd77747716 100644
--- a/src/soc/intel/cannonlake/pmc.c
+++ b/src/soc/intel/cannonlake/pmc.c
@@ -25,6 +25,41 @@
#include <soc/pci_devs.h>
#include <soc/pm.h>
+/*
+ * Set which power state system will be after reapplying
+ * the power (from G3 State)
+ */
+static void pmc_set_afterg3(struct device *dev, int s5pwr)
+{
+ uint8_t reg8;
+
+ reg8 = pci_read_config8(dev, GEN_PMCON_B);
+
+ switch (s5pwr) {
+ case MAINBOARD_POWER_STATE_OFF:
+ reg8 |= 1;
+ break;
+ case MAINBOARD_POWER_STATE_ON:
+ reg8 &= ~1;
+ break;
+ case MAINBOARD_POWER_STATE_PREVIOUS:
+ default:
+ break;
+ }
+
+ pci_write_config8(dev, GEN_PMCON_B, reg8);
+}
+
+/*
+ * Set PMC register to know which state system should be after
+ * power reapplied
+ */
+void pmc_soc_restore_power_failure(void)
+{
+ pmc_set_afterg3(PCH_DEV_PMC,
+ pmc_get_mainboard_power_failure_state_choice());
+}
+
static void config_deep_sX(uint32_t offset, uint32_t mask, int sx, int enable)
{
uint32_t reg;
@@ -66,6 +101,39 @@ static void config_deep_sx(uint32_t deepsx_config)
write32(pmcbase + DSX_CFG, reg);
}
+static void pch_power_options(struct device *dev)
+{
+ const char *state;
+
+ /* Get the chip configuration */
+ int pwr_on = pmc_get_mainboard_power_failure_state_choice();
+
+ /*
+ * Which state do we want to goto after g3 (power restored)?
+ * 0 == S5 Soft Off
+ * 1 == S0 Full On
+ * 2 == Keep Previous State
+ */
+ switch (pwr_on) {
+ case MAINBOARD_POWER_STATE_OFF:
+ state = "off";
+ break;
+ case MAINBOARD_POWER_STATE_ON:
+ state = "on";
+ break;
+ case MAINBOARD_POWER_STATE_PREVIOUS:
+ state = "state keep";
+ break;
+ default:
+ state = "undefined";
+ }
+ pmc_set_afterg3(dev, pwr_on);
+ printk(BIOS_INFO, "Set power %s after power failure.\n", state);
+
+ /* Set up GPE configuration. */
+ pmc_gpe_init();
+}
+
static void pmc_init(void *unused)
{
device_t dev = PCH_DEV_PMC;
@@ -74,7 +142,7 @@ static void pmc_init(void *unused)
rtc_init();
/* Initialize power management */
- pmc_gpe_init();
+ pch_power_options(dev);
pmc_set_acpi_mode();