diff options
Diffstat (limited to 'test/tpm_test/ftdi_spi_tpm.c')
| -rw-r--r-- | test/tpm_test/ftdi_spi_tpm.c | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/test/tpm_test/ftdi_spi_tpm.c b/test/tpm_test/ftdi_spi_tpm.c index 22e287af5e..c0fc2669e2 100644 --- a/test/tpm_test/ftdi_spi_tpm.c +++ b/test/tpm_test/ftdi_spi_tpm.c @@ -78,6 +78,7 @@ void FtdiStop(void) mpsse_ = NULL; } +static int FtdiReadReg(unsigned reg_number, size_t bytes, void *buffer); /* * If the TPM is asleep we may need to poke it once to wake it up. Just assert * the CS briefly without sending any data, then wait a bit to be sure it's @@ -85,10 +86,13 @@ void FtdiStop(void) */ static void FtdiSpiPoke(void) { + uint32_t did_vid; + Start(mpsse_); - usleep(10000); Stop(mpsse_); usleep(60000); + /* Try to read register. */ + FtdiReadReg(TPM_DID_VID_REG, sizeof(did_vid), &did_vid); } static void StartTransaction(int read_write, size_t bytes, unsigned addr) @@ -99,10 +103,10 @@ static void StartTransaction(int read_write, size_t bytes, unsigned addr) char *transfer_data; /* - * give it 10 ms. TODO(vbendeb): remove this once cr50 SPP TPM driver + * give it 200 us. TODO(vbendeb): remove this once cr50 SPP TPM driver * performance is fixed. */ - usleep(10000); + usleep(200); /* * The first byte of the frame header encodes the transaction type |