EMAC_CTL_RESET
writel(EMAC_CTL_RESET, db->membase + EMAC_CTL_REG);
writel(reg_val | EMAC_CTL_RESET | EMAC_CTL_TX_EN | EMAC_CTL_RX_EN,
reg_val &= ~(EMAC_CTL_TX_EN | EMAC_CTL_RX_EN | EMAC_CTL_RESET);