ADDR_PORT
outb(reg, pdata->base_port + ADDR_PORT);
outb(reg, pdata->base_port + ADDR_PORT);
outb(EXIT_KEY, base_port + ADDR_PORT);
outb(key, base_port + ADDR_PORT);
outb(key, base_port + ADDR_PORT);
outb(EXIT_KEY, base_port + ADDR_PORT);
release_region(base_port + ADDR_PORT, 2);