bus_get_resource_count
if (bus_get_resource_count(dev, SYS_RES_IOPORT, 0) == 4)
if (bus_get_resource_count(dev, SYS_RES_IOPORT, 1) == 0) {
bus_get_resource_count(dev, SYS_RES_IOPORT, sc->port_rid)));
bus_get_resource_count(dev, SYS_RES_IOPORT, sc->port_rid)));
bus_get_resource_count(dev, SYS_RES_IOPORT, sc->port_rid));
u_long bus_get_resource_count(device_t dev, int type, int rid);