I8255_CTRL_REG
dio200_write8(dev, subpriv->ofs + I8255_CTRL_REG, config);
spriv->io(dev, 1, I8255_CTRL_REG, config, context);
port_8255_cfg = dev->iobase + I8255_CTRL_REG;
port_8255_cfg = dev->iobase + I8255_SIZE + I8255_CTRL_REG;