GSC_STATUS
#define gscps2_readb_status(x) readb((x)+GSC_STATUS)
ps2port->addr = ioremap(hpa, GSC_STATUS + 4);
if (!request_mem_region(hpa, GSC_STATUS + 4, ps2port->port.name))
release_mem_region(dev->hpa.start, GSC_STATUS + 4);
release_mem_region(dev->hpa, GSC_STATUS + 4);