ATL2_SFC
val = AT_READ_4(sc, ATL2_SFC);
AT_WRITE_4(sc, ATL2_SFC, val & ~(SFC_EN_VPD));
AT_WRITE_4(sc, ATL2_SFC, v);
AT_WRITE_4(sc, ATL2_SFC, v);
if (!(AT_READ_4(sc, ATL2_SFC) & SFC_START))