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authorSubrata Banik <subrata.banik@intel.com>2017-12-13 11:02:43 +0530
committerSubrata Banik <subrata.banik@intel.com>2017-12-21 03:48:00 +0000
commit9b98febe7a9126ab4a323c8eeedb1427e959f7d9 (patch)
tree9da5751c0215f152dc04f93868a8a189b6ac8630 /src
parente5ab9e28a6041209fd88bc7f760df60662539ba1 (diff)
downloadcoreboot-9b98febe7a9126ab4a323c8eeedb1427e959f7d9.tar.xz
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>
Diffstat (limited to 'src')
-rw-r--r--src/soc/intel/common/block/include/intelblocks/pmclib.h24
-rw-r--r--src/soc/intel/common/block/pmc/Kconfig25
-rw-r--r--src/soc/intel/common/block/pmc/pmclib.c26
3 files changed, 75 insertions, 0 deletions
diff --git a/src/soc/intel/common/block/include/intelblocks/pmclib.h b/src/soc/intel/common/block/include/intelblocks/pmclib.h
index a045bbea58..3827cf511a 100644
--- a/src/soc/intel/common/block/include/intelblocks/pmclib.h
+++ b/src/soc/intel/common/block/include/intelblocks/pmclib.h
@@ -133,6 +133,12 @@ void pmc_clear_all_gpe_status(void);
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.
* This is cleared on cold boot, hard reset, soft reset and Sx.
@@ -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 */
diff --git a/src/soc/intel/common/block/pmc/Kconfig b/src/soc/intel/common/block/pmc/Kconfig
index c00e14c303..cfd12d8f3e 100644
--- a/src/soc/intel/common/block/pmc/Kconfig
+++ b/src/soc/intel/common/block/pmc/Kconfig
@@ -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
diff --git a/src/soc/intel/common/block/pmc/pmclib.c b/src/soc/intel/common/block/pmc/pmclib.c
index f653bf08a1..dea7e1bc18 100644
--- a/src/soc/intel/common/block/pmc/pmclib.c
+++ b/src/soc/intel/common/block/pmc/pmclib.c
@@ -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;
+}