DW_MISC_CONTROL_1
reg = pci_dw_dbi_rd4(sc->dev, DW_MISC_CONTROL_1);
pci_dw_dbi_wr4(sc->dev, DW_MISC_CONTROL_1, reg);
reg = DBI_RD4(sc, DW_MISC_CONTROL_1);
DBI_WR4(sc, DW_MISC_CONTROL_1, reg);
reg = pci_dw_dbi_rd4(sc->dev, DW_MISC_CONTROL_1);
pci_dw_dbi_wr4(sc->dev, DW_MISC_CONTROL_1, reg);