soc/intel/common: Add API to restore power failure into PMC common code

PMC config register need to program to define which state system
should be after reapplied power from G3 state.

0 = System will return to S0 state
1 = System will return to S5 state
2 = System will return to previous state before failure

Refer to EDS for detailed programming sequence.

Change-Id: I0ce2cc77745d00a8cfe3eed7c6372af77e063d02
Signed-off-by: Subrata Banik <subrata.banik@intel.com>
Reviewed-on: https://review.coreboot.org/22838
Reviewed-by: Furquan Shaikh <furquan@google.com>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
This commit is contained in:
Subrata Banik 2017-12-13 11:02:43 +05:30
parent e5ab9e28a6
commit 9b98febe7a
3 changed files with 75 additions and 0 deletions

View File

@ -132,6 +132,12 @@ void pmc_clear_all_gpe_status(void);
/* Clear status bits in Power and Reset Status (PRSTS) register */
void pmc_clear_prsts(void);
/*
* Set PMC register to know which state system should be after
* power reapplied
*/
void pmc_soc_restore_power_failure(void);
/*
* Enable or disable global reset. If global reset is enabled, hard reset and
* soft reset will trigger global reset, where both host and TXE are reset.
@ -205,4 +211,22 @@ void soc_get_gpi_gpe_configs(uint8_t *dw0, uint8_t *dw1, uint8_t *dw2);
*/
void soc_fill_power_state(struct chipset_power_state *ps);
/*
* Which state do we want to goto after g3 (power restored)?
* 0 == S5 Soft Off
* 1 == S0 Full On
* 2 == Keep Previous State
*/
enum {
MAINBOARD_POWER_STATE_OFF,
MAINBOARD_POWER_STATE_ON,
MAINBOARD_POWER_STATE_PREVIOUS,
};
/*
* Determines what state to go to when power is reapplied
* after a power failure (G3 State)
*/
int pmc_get_mainboard_power_failure_state_choice(void);
#endif /* SOC_INTEL_COMMON_BLOCK_PMCLIB_H */

View File

@ -5,3 +5,28 @@ config SOC_INTEL_COMMON_BLOCK_PMC
help
Intel Processor common code for Power Management controller(PMC)
subsystem
choice
prompt "System Power State after Failure"
default POWER_STATE_ON_AFTER_FAILURE
config POWER_STATE_OFF_AFTER_FAILURE
bool "S5 Soft Off"
help
Choose this option if you want to keep system into
S5 after reapplying power after failure
config POWER_STATE_ON_AFTER_FAILURE
bool "S0 Full On"
help
Choose this option if you want to keep system into
S0 after reapplying power after failure
config POWER_STATE_PREVIOUS_AFTER_FAILURE
bool "Keep Previous State"
help
Choose this option if you want to keep system into
same power state as before failure even after reapplying
power
endchoice

View File

@ -80,6 +80,18 @@ __attribute__ ((weak)) uint32_t soc_get_smi_status(uint32_t generic_sts)
return generic_sts;
}
/*
* Set PMC register to know which state system should be after
* power reapplied
*/
__attribute__ ((weak)) void pmc_soc_restore_power_failure(void)
{
/*
* SoC code should set PMC config register in order to set
* MAINBOARD_POWER_ON bit as per EDS.
*/
}
static uint32_t pmc_reset_smi_status(void)
{
uint32_t smi_sts = inl(ACPI_BASE_ADDRESS + SMI_STS);
@ -590,3 +602,17 @@ void pmc_gpe_init(void)
/* Set the routes in the GPIO communities as well. */
gpio_route_gpe(dw0, dw1, dw2);
}
/*
* Determines what state to go to when power is reapplied
* after a power failure (G3 State)
*/
int pmc_get_mainboard_power_failure_state_choice(void)
{
if (IS_ENABLED(CONFIG_POWER_STATE_PREVIOUS_AFTER_FAILURE))
return MAINBOARD_POWER_STATE_PREVIOUS;
else if (IS_ENABLED(CONFIG_POWER_STATE_ON_AFTER_FAILURE))
return MAINBOARD_POWER_STATE_ON;
return MAINBOARD_POWER_STATE_OFF;
}