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soc/intel/cannonlake: Implement pmc_soc_restore_power_failure as per EDS 

TEST=CNL_RVP is able to power on after reconnecting power supply.

Change-Id: I41e655fe79d958cce9e627ea2f2380185364ab19
Signed-off-by: Subrata Banik <subrata.banik@intel.com>
Reviewed-on: https://review.coreboot.org/22840
Reviewed-by: Furquan Shaikh <furquan@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
This commit is contained in:
Subrata Banik 2017-12-19 12:33:59 +05:30
parent c1d99c9962
commit 33cd28e7ac
1 changed files with 69 additions and 1 deletions
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70
src/soc/intel/cannonlake/pmc.c
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@ -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();