DMA4_CSDP_SRC_ENDIANISM
| DMA4_CSDP_SRC_ENDIANISM(0)
sc->sc_channel[ch].reg_csdp &= ~DMA4_CSDP_SRC_ENDIANISM(1);
sc->sc_channel[ch].reg_csdp |= DMA4_CSDP_SRC_ENDIANISM(src);