Cnfg
u16 cfg_value = ioread16(ioaddr + Cnfg);
iowrite16(cfg_value & ~0x1000, ioaddr + Cnfg);
iowrite16(cfg_value | 0x1000, ioaddr + Cnfg);
iowrite16(0x01CF, ioaddr + Cnfg);
iowrite16(0x101C | (yp->full_duplex ? 2 : 0), ioaddr + Cnfg);
iowrite16(0x101C | (yp->full_duplex ? 2 : 0), ioaddr + Cnfg);