diff options
Diffstat (limited to 'src/soc/intel/cannonlake/pmc.c')
| -rw-r--r-- | src/soc/intel/cannonlake/pmc.c | 70 |
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(); |