diff options
Diffstat (limited to 'chip/g/sps_tpm.c')
| -rw-r--r-- | chip/g/sps_tpm.c | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/chip/g/sps_tpm.c b/chip/g/sps_tpm.c index 9d266056e6..8af3765642 100644 --- a/chip/g/sps_tpm.c +++ b/chip/g/sps_tpm.c @@ -7,6 +7,7 @@ #include "console.h" #include "hooks.h" #include "sps.h" +#include "system.h" #include "tpm_registers.h" #include "util.h" @@ -123,6 +124,9 @@ static void init_new_cycle(void) sps_tpm_state = SPS_TPM_STATE_RECEIVING_HEADER; rx_fifo_base = sps_rx_fifo_wrptr(); sps_tx_status(TPM_STALL_ASSERT); + /* We're just waiting for a new command, so we could sleep. */ + delay_sleep_by(1 * SECOND); + enable_sleep(SLEEP_MASK_SPI); } /* Extract R/W bit, register addresss, and data count from 4-byte header */ @@ -139,7 +143,9 @@ static int header_says_to_read(uint8_t *data, uint32_t *reg, uint32_t *count) /* actual RX FIFO handler (runs in interrupt context) */ static void process_rx_data(uint8_t *data, size_t data_size) { - /* We're collecting incoming bytes ... */ + /* We're receiving some bytes, so don't sleep */ + disable_sleep(SLEEP_MASK_SPI); + if ((rxbuf_count + data_size) > RXBUF_MAX) { CPRINTS("TPM SPI input overflow: %d + %d > %d in state %d", rxbuf_count, data_size, RXBUF_MAX, sps_tpm_state); @@ -266,6 +272,9 @@ static void sps_tpm_disable(void) { sps_tpm_state = SPS_TPM_STATE_PONDERING; sps_unregister_rx_handler(); + /* We don't care anymore, so we can sleep whenever */ + delay_sleep_by(0); + enable_sleep(SLEEP_MASK_SPI); } static int command_sps_tpm(int argc, char **argv) |