dmac_read_2
dmac_read_2(scp, SCA_CDAL1),
dmac_read_2(scp, SCA_EDAL1),
dmac_read_2(scp, SCA_CDAL1),
dmac_read_2(scp, SCA_EDAL1),
static inline u_int16_t dmac_read_2(sca_port_t *, u_int);
cda = dmac_read_2(scp, SCA_CDAL0);