SPI_PDC_BASE
PUTREG(sc, SPI_PDC_BASE + PDC_PTCR, PDC_PTCR_TXTDIS | PDC_PTCR_RXTDIS);
PUTREG(sc, SPI_PDC_BASE + PDC_RNCR, 0);
PUTREG(sc, SPI_PDC_BASE + PDC_RCR, 0);
PUTREG(sc, SPI_PDC_BASE + PDC_TNCR, 0);
PUTREG(sc, SPI_PDC_BASE + PDC_TCR, 0);
PUTREG(sc, SPI_PDC_BASE + PDC_PTCR, PDC_PTCR_TXTEN | PDC_PTCR_RXTEN);
PUTREG(sc, SPI_PDC_BASE + PDC_RNPR, sc->sc_dmaaddr + sc->sc_dmaoffs);
PUTREG(sc, SPI_PDC_BASE + PDC_RNCR, len);
PUTREG(sc, SPI_PDC_BASE + PDC_TNPR, sc->sc_dmaaddr + sc->sc_dmaoffs);
PUTREG(sc, SPI_PDC_BASE + PDC_TNCR, len);