diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/hw/tpm_drivers.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/src/hw/tpm_drivers.c b/src/hw/tpm_drivers.c index ed58bf58..7e6a96a4 100644 --- a/src/hw/tpm_drivers.c +++ b/src/hw/tpm_drivers.c @@ -374,12 +374,22 @@ static u32 tis_waitrespready(enum tpmDurationType to_t) return rc; } +#define CRB_STATE_VALID_STS 0b10000000 +#define CRB_STATE_LOC_ASSIGNED 0x00000010 +#define CRB_STATE_READY_MASK (CRB_STATE_VALID_STS | CRB_STATE_LOC_ASSIGNED) + /* if device is not there, return '0', '1' otherwise */ static u32 crb_probe(void) { if (!CONFIG_TCGBIOS) return 0; + /* Wait for the interface to report it's ready */ + u32 rc = crb_wait_reg(0, CRB_REG_LOC_STATE, TIS2_DEFAULT_TIMEOUT_D, + CRB_STATE_READY_MASK, CRB_STATE_VALID_STS); + if (rc) + return 0; + u32 ifaceid = readl(CRB_REG(0, CRB_REG_INTF_ID)); if ((ifaceid & 0xf) != 0xf) { |