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soc/intel/apollolake: Initialize GPEs in bootblock

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Initialize the GPEs from mainboard config in bootblock, so they
can be used in verstage to query latched interrupt status.

I still left it called in ramstage just to be sure that the
configuration was not overwritten in FSP stages.

Tested by reading and reporting GPE status in a loop in verstage
and manually triggering an interrupt on EC console.

BUG=chrome-os-partner:53336

Change-Id: Iacd0483e4b3229aca602bb5bb40586eedf35a6ea
Signed-off-by: Duncan Laurie <dlaurie@chromium.org>
Reviewed-on: https://review.coreboot.org/16670
Tested-by: build bot (Jenkins)
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
This commit is contained in:
Duncan Laurie
2016-09-19 12:02:54 -07:00
committed by Patrick Georgi
parent 1f6e681355
commit a673d1cd2d
4 changed files with 63 additions and 59 deletions
Download Patch File Download Diff File Expand all files Collapse all files

58
src/soc/intel/apollolake/pmutil.c
View File

@@ -29,6 +29,7 @@
#include <device/device.h>
#include <device/pci.h>
#include <vboot/vboot_common.h>
#include "chip.h"
static uintptr_t read_pmc_mmio_bar(void)
{
@@ -462,3 +463,60 @@ void poweroff(void)
if (!ENV_SMM)
halt();
}
void pmc_gpe_init(void)
{
uint32_t gpio_cfg = 0;
uint32_t gpio_cfg_reg;
uint8_t dw1, dw2, dw3;
ROMSTAGE_CONST struct soc_intel_apollolake_config *config;
/* Look up the device in devicetree */
ROMSTAGE_CONST struct device *dev = dev_find_slot(0, NB_DEVFN);
if (!dev || !dev->chip_info) {
printk(BIOS_ERR, "BUG! Could not find SOC devicetree config\n");
return;
}
config = dev->chip_info;
uintptr_t pmc_bar = get_pmc_mmio_bar();
const uint32_t gpio_cfg_mask =
(GPE0_DWX_MASK << GPE0_DW1_SHIFT) |
(GPE0_DWX_MASK << GPE0_DW2_SHIFT) |
(GPE0_DWX_MASK << GPE0_DW3_SHIFT);
/* Assign to local variable */
dw1 = config->gpe0_dw1;
dw2 = config->gpe0_dw2;
dw3 = config->gpe0_dw3;
/* Making sure that bad values don't bleed into the other fields */
dw1 &= GPE0_DWX_MASK;
dw2 &= GPE0_DWX_MASK;
dw3 &= GPE0_DWX_MASK;
/* Route the GPIOs to the GPE0 block. Determine that all values
* are different, and if they aren't use the reset values.
* DW0 is reserved/unused */
if (dw1 == dw2 || dw2 == dw3) {
printk(BIOS_INFO, "PMC: Using default GPE route.\n");
gpio_cfg = read32((void *)pmc_bar + GPIO_GPE_CFG);
dw1 = (gpio_cfg >> GPE0_DW1_SHIFT) & GPE0_DWX_MASK;
dw2 = (gpio_cfg >> GPE0_DW2_SHIFT) & GPE0_DWX_MASK;
dw3 = (gpio_cfg >> GPE0_DW3_SHIFT) & GPE0_DWX_MASK;
} else {
gpio_cfg |= (uint32_t)dw1 << GPE0_DW1_SHIFT;
gpio_cfg |= (uint32_t)dw2 << GPE0_DW2_SHIFT;
gpio_cfg |= (uint32_t)dw3 << GPE0_DW3_SHIFT;
}
gpio_cfg_reg = read32((void *)pmc_bar + GPIO_GPE_CFG) & ~gpio_cfg_mask;
gpio_cfg_reg |= gpio_cfg & gpio_cfg_mask;
write32((void *)pmc_bar + GPIO_GPE_CFG, gpio_cfg_reg);
/* Set the routes in the GPIO communities as well. */
gpio_route_gpe(dw1, dw2, dw3);
}