.read_first_n = &sca3000_read_first_n_hw_rb,
.data_available = sca3000_ring_buf_data_available,
.release = sca3000_ring_release,
.read_first_n = &sca3000_read_first_n_hw_rb,
.data_available = sca3000_ring_buf_data_available,
.release = sca3000_ring_release,