GM_PHY_ADDR
reg = gma_read16(hw, port, GM_PHY_ADDR);
gma_write16(hw, port, GM_PHY_ADDR, reg | GM_PAR_MIB_CLR);
gma_write16(hw, port, GM_PHY_ADDR, reg);
reg = gma_read16(hw, port, GM_PHY_ADDR);
gma_write16(hw, port, GM_PHY_ADDR, reg | GM_PAR_MIB_CLR);
gma_write16(hw, port, GM_PHY_ADDR, reg);