From 24295573503e5617fa18dcec24ae3f3402e452de Mon Sep 17 00:00:00 2001 From: Karthikeyan Ramasubramanian Date: Thu, 25 Mar 2021 18:07:12 -0600 Subject: soc/amd/common: Handle power resume after power failure Introduce a power management library to handle the power resume after power failure. Enable HAVE_POWER_STATE_AFTER_FAILURE config when this library is enabled. BUG=b:183739671 TEST=Build Guybrush and Majolica mainboard. Change-Id: Iea4ea57d747425fe6714d40ba6e60f2447febf28 Signed-off-by: Karthikeyan Ramasubramanian Reviewed-on: https://review.coreboot.org/c/coreboot/+/51924 Tested-by: build bot (Jenkins) Reviewed-by: Felix Held --- src/soc/amd/common/block/include/amdblocks/pmlib.h | 20 ++++++++++ src/soc/amd/common/block/pm/Kconfig | 13 +++++++ src/soc/amd/common/block/pm/Makefile.inc | 1 + src/soc/amd/common/block/pm/pmlib.c | 43 ++++++++++++++++++++++ 4 files changed, 77 insertions(+) create mode 100644 src/soc/amd/common/block/include/amdblocks/pmlib.h create mode 100644 src/soc/amd/common/block/pm/Kconfig create mode 100644 src/soc/amd/common/block/pm/Makefile.inc create mode 100644 src/soc/amd/common/block/pm/pmlib.c diff --git a/src/soc/amd/common/block/include/amdblocks/pmlib.h b/src/soc/amd/common/block/include/amdblocks/pmlib.h new file mode 100644 index 000000000000..c778664a4976 --- /dev/null +++ b/src/soc/amd/common/block/include/amdblocks/pmlib.h @@ -0,0 +1,20 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ + +#ifndef SOC_AMD_COMMON_BLOCK_PMLIB_H +#define SOC_AMD_COMMON_BLOCK_PMLIB_H + +enum { + MAINBOARD_POWER_STATE_OFF, + MAINBOARD_POWER_STATE_ON, + MAINBOARD_POWER_STATE_PREVIOUS, +}; + +/* + * Configure power state to go into when power is reapplied. + * + * This function is invoked by SoC during the boot and configures the power state based on + * selected config items. + */ +void pm_set_power_failure_state(void); + +#endif /* SOC_AMD_COMMON_BLOCK_PMLIB_H */ diff --git a/src/soc/amd/common/block/pm/Kconfig b/src/soc/amd/common/block/pm/Kconfig new file mode 100644 index 000000000000..c976d017ec8c --- /dev/null +++ b/src/soc/amd/common/block/pm/Kconfig @@ -0,0 +1,13 @@ +config SOC_AMD_COMMON_BLOCK_PM + bool + depends on SOC_AMD_COMMON_BLOCK_ACPIMMIO + select HAVE_POWER_STATE_AFTER_FAILURE + help + AMD Processor common code for Power Management (PM) subsystem. + +if SOC_AMD_COMMON_BLOCK_PM + +config POWER_STATE_DEFAULT_ON_AFTER_FAILURE + default y + +endif # SOC_AMD_COMMON_BLOCK_PM diff --git a/src/soc/amd/common/block/pm/Makefile.inc b/src/soc/amd/common/block/pm/Makefile.inc new file mode 100644 index 000000000000..f465e99ec156 --- /dev/null +++ b/src/soc/amd/common/block/pm/Makefile.inc @@ -0,0 +1 @@ +bootblock-$(CONFIG_SOC_AMD_COMMON_BLOCK_PM) += pmlib.c diff --git a/src/soc/amd/common/block/pm/pmlib.c b/src/soc/amd/common/block/pm/pmlib.c new file mode 100644 index 000000000000..9cb9d528b9d9 --- /dev/null +++ b/src/soc/amd/common/block/pm/pmlib.c @@ -0,0 +1,43 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ + +#include +#include +#include +#include + +#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); +} -- cgit v1.2.3