fifo_status_bits
unsigned int fifo_status_bits;
fifo_status_bits = fifos_read(e_priv, FIFO_CONTROL_STATUS_REG);
e_priv->supports_fifo_interrupts = (fifo_status_bits & TX_FIFO_EMPTY) &&
(fifo_status_bits & TX_FIFO_HALF_EMPTY);