diff options
Diffstat (limited to 'src/soc/amd/stoneyridge/southbridge.c')
| -rw-r--r-- | src/soc/amd/stoneyridge/southbridge.c | 71 |
1 files changed, 71 insertions, 0 deletions
diff --git a/src/soc/amd/stoneyridge/southbridge.c b/src/soc/amd/stoneyridge/southbridge.c index 55e39569d0..a2a54c211c 100644 --- a/src/soc/amd/stoneyridge/southbridge.c +++ b/src/soc/amd/stoneyridge/southbridge.c @@ -23,6 +23,7 @@ #include <device/pci_ids.h> #include <device/pci_ops.h> #include <cbmem.h> +#include <elog.h> #include <amdblocks/amd_pci_util.h> #include <soc/southbridge.h> #include <soc/smi.h> @@ -604,9 +605,79 @@ static void sb_init_acpi_ports(void) PM_ACPI_TIMER_EN_EN); } +static void print_num_status_bits(int num_bits, uint32_t status, + const char *const bit_names[]) +{ + int i; + + if (!status) + return; + + for (i = num_bits - 1; i >= 0; i--) { + if (status & (1 << i)) { + if (bit_names[i]) + printk(BIOS_DEBUG, "%s ", bit_names[i]); + else + printk(BIOS_DEBUG, "BIT%d ", i); + } + } +} + +static uint16_t reset_pm1_status(void) +{ + uint16_t pm1_sts = inw(ACPI_PM_EVT_BLK); + outw(pm1_sts, ACPI_PM_EVT_BLK); + return pm1_sts; +} + +static uint16_t print_pm1_status(uint16_t pm1_sts) +{ + static const char *const pm1_sts_bits[] = { + [0] = "TMROF", + [4] = "BMSTATUS", + [5] = "GBL", + [8] = "PWRBTN", + [10] = "RTC", + [14] = "PCIEXPWAK", + [15] = "WAK", + }; + + if (!pm1_sts) + return 0; + + printk(BIOS_SPEW, "PM1_STS: "); + print_num_status_bits(ARRAY_SIZE(pm1_sts_bits), pm1_sts, pm1_sts_bits); + printk(BIOS_SPEW, "\n"); + + return pm1_sts; +} + +static void sb_log_pm1_status(uint16_t pm1_sts) +{ + if (!IS_ENABLED(CONFIG_ELOG)) + return; + + if (pm1_sts & PWRBTN_STS) + elog_add_event_wake(ELOG_WAKE_SOURCE_PWRBTN, 0); + + if (pm1_sts & RTC_STS) + elog_add_event_wake(ELOG_WAKE_SOURCE_RTC, 0); + + if (pm1_sts & PCIEXPWAK_STS) + elog_add_event_wake(ELOG_WAKE_SOURCE_PCIE, 0); +} + +static void sb_clear_pm1_status(void) +{ + uint16_t pm1_sts = reset_pm1_status(); + sb_log_pm1_status(pm1_sts); + print_pm1_status(pm1_sts); +} + void southbridge_init(void *chip_info) { sb_init_acpi_ports(); + sb_clear_pm1_status(); } void southbridge_final(void *chip_info) |