diff options
Diffstat (limited to 'test/tpm_test/ftdi_spi_tpm.c')
| -rw-r--r-- | test/tpm_test/ftdi_spi_tpm.c | 15 |
1 files changed, 8 insertions, 7 deletions
diff --git a/test/tpm_test/ftdi_spi_tpm.c b/test/tpm_test/ftdi_spi_tpm.c index ebec39b766..22e287af5e 100644 --- a/test/tpm_test/ftdi_spi_tpm.c +++ b/test/tpm_test/ftdi_spi_tpm.c @@ -99,7 +99,7 @@ static void StartTransaction(int read_write, size_t bytes, unsigned addr) char *transfer_data; /* - * give it 10 ms. TODO(vbendeb): remove this once cr50 SPS TPM driver + * give it 10 ms. TODO(vbendeb): remove this once cr50 SPP TPM driver * performance is fixed. */ usleep(10000); @@ -124,12 +124,13 @@ static void StartTransaction(int read_write, size_t bytes, unsigned addr) * control (Section "6.4.5 Flow Control" of the TCG issued "TPM * Profile (PTP) Specification Revision 00.43). * - * The slave (TPM device) expects each transaction to start with a 4 - * byte header trasmitted by master. If the slave needs to stall the - * transaction, it sets the MOSI bit to 0 during the last clock of the - * 4 byte header. In this case the master is supposed to start polling - * the line, byte at time, until the last bit in the received byte - * (transferred during the last clock of the byte) is set to 1. + * The peripheral (TPM device) expects each transaction to start with a + * 4 byte header trasmitted by controller. If the peripheral needs to + * stall the transaction, it sets the MOSI bit to 0 during the last + * clock of the 4 byte header. In this case the controller is supposed + * to start polling the line, byte at time, until the last bit in the + * received byte (transferred during the last clock of the byte) is set + * to 1. */ flow_c = transfer_data[3]; free(transfer_data); |