diff options
| -rw-r--r-- | chip/npcx/wov.c | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/chip/npcx/wov.c b/chip/npcx/wov.c index 57302fd01b..94cd8251d2 100644 --- a/chip/npcx/wov.c +++ b/chip/npcx/wov.c @@ -173,6 +173,14 @@ static wov_call_back_t callback_fun; const uint32_t voice_buffer[VOICE_BUF_SIZE] = {0}; +#define WOV_RATE_ERROR_THRESH_MSEC 10 +#define WOV_RATE_ERROR_THRESH 5 + +static int irq_underrun_count; +static int irq_overrun_count; +static uint32_t wov_i2s_underrun_tstamp; +static uint32_t wov_i2s_overrun_tstamp; + #define WOV_CALLBACK(event) \ { \ if (callback_fun != NULL) \ @@ -536,6 +544,36 @@ static enum ec_error_list wov_set_mic_source_l(void) return EC_SUCCESS; } +static void wov_over_under_deferred(void) +{ + CPRINTS("wov: Under/Over run error: under = %d, over = %d", + irq_underrun_count, irq_overrun_count); +} +DECLARE_DEFERRED(wov_over_under_deferred); + +static void wov_under_over_error_handler(int *count, uint32_t *last_time) +{ + uint32_t time_delta_msec; + uint32_t current_time = get_time().le.lo; + + if (!(*count)) { + *last_time = current_time; + (*count)++; + } else { + time_delta_msec = (current_time - *last_time) / MSEC; + *last_time = current_time; + if (time_delta_msec < WOV_RATE_ERROR_THRESH_MSEC) + (*count)++; + else + *count = 0; + + if (*count >= WOV_RATE_ERROR_THRESH) { + wov_stop_i2s_capture(); + hook_call_deferred(&wov_over_under_deferred_data, 0); + } + } +} + /** * WoV interrupt handler. * @@ -586,12 +624,16 @@ void wov_interrupt_handler(void) /* I2S FIFO is overrun. Reset the I2S FIFO and inform the FW. */ if (WOV_IS_I2S_FIFO_OVERRUN(wov_status)) { WOV_CALLBACK(WOV_EVENT_ERROR_I2S_FIFO_OVERRUN); + wov_under_over_error_handler(&irq_overrun_count, + &wov_i2s_overrun_tstamp); wov_i2s_fifo_reset(); } /* I2S FIFO is underrun. Reset the I2S FIFO and inform the FW. */ if (WOV_IS_I2S_FIFO_UNDERRUN(wov_status)) { WOV_CALLBACK(WOV_EVENT_ERROR_I2S_FIFO_UNDERRUN); + wov_under_over_error_handler(&irq_underrun_count, + &wov_i2s_underrun_tstamp); wov_i2s_fifo_reset(); } @@ -1166,6 +1208,10 @@ void wov_i2s_fifo_reset(void) */ void wov_start_i2s_capture(void) { + /* Clear counters used to track for underrun/overrun errors */ + irq_underrun_count = 0; + irq_overrun_count = 0; + /* Clear the I2S status bits in WoV status register. */ SET_FIELD(NPCX_WOV_STATUS, NPCX_WOV_STATUS_BITS, 0x18); |