MTK_FE_GLO_CFG
val = mtk_r32(eth, MTK_FE_GLO_CFG(i)) | MTK_FE_LINK_DOWN_P(PSE_PPE0_PORT);
mtk_w32(eth, val, MTK_FE_GLO_CFG(i));
val = mtk_r32(eth, MTK_FE_GLO_CFG(i)) & ~MTK_FE_LINK_DOWN_P(PSE_PPE0_PORT);
mtk_w32(eth, val, MTK_FE_GLO_CFG(i));