vrdsu_softc
static void vrdsu_write(struct vrdsu_softc *, int, unsigned short);
static unsigned short vrdsu_read(struct vrdsu_softc *, int);
CFATTACH_DECL_NEW(vrdsu, sizeof(struct vrdsu_softc),
struct vrdsu_softc *the_dsu_sc = NULL;
vrdsu_write(struct vrdsu_softc *sc, int port, unsigned short val)
vrdsu_read(struct vrdsu_softc *sc, int port)
struct vrdsu_softc *sc = device_private(self);