| /* SPDX-License-Identifier: GPL-2.0-only */ |
| |
| #include <amdblocks/acpimmio.h> |
| #include <amdblocks/pmlib.h> |
| #include <console/console.h> |
| #include <types.h> |
| |
| #define PM_RTC_SHADOW_REG 0x5b |
| /* Init bit to be set by BIOS while configuring the PWR_FAIL_* shadow bits. */ |
| #define PWR_FAIL_INIT BIT(2) |
| #define PWR_FAIL_MASK (BIT(0) | BIT(1) | BIT(2) | BIT(3)) |
| #define PWR_FAIL_OFF 0x0 /* Always power off after power resumes */ |
| #define PWR_FAIL_ON 0x1 /* Always power on after power resumes */ |
| #define PWR_FAIL_PREV 0x3 /* Use previous setting after power resumes */ |
| |
| void pm_set_power_failure_state(void) |
| { |
| uint8_t val, pwr_fail = PWR_FAIL_INIT; |
| |
| switch (CONFIG_MAINBOARD_POWER_FAILURE_STATE) { |
| case MAINBOARD_POWER_STATE_OFF: |
| printk(BIOS_INFO, "Set power off after power failure.\n"); |
| pwr_fail |= PWR_FAIL_OFF; |
| break; |
| case MAINBOARD_POWER_STATE_ON: |
| printk(BIOS_INFO, "Set power on after power failure.\n"); |
| pwr_fail |= PWR_FAIL_ON; |
| break; |
| case MAINBOARD_POWER_STATE_PREVIOUS: |
| printk(BIOS_INFO, "Keep power state after power failure.\n"); |
| pwr_fail |= PWR_FAIL_PREV; |
| break; |
| default: |
| printk(BIOS_WARNING, "WARNING: Unknown power-failure state: %d\n", |
| CONFIG_MAINBOARD_POWER_FAILURE_STATE); |
| pwr_fail |= PWR_FAIL_OFF; |
| break; |
| } |
| |
| val = pm_io_read8(PM_RTC_SHADOW_REG) & ~PWR_FAIL_MASK; |
| val |= pwr_fail; |
| pm_io_write8(PM_RTC_SHADOW_REG, val); |
| } |