EMAC_MAC_MCMD_REG
writel(0x1, data->membase + EMAC_MAC_MCMD_REG);
writel(0x0, data->membase + EMAC_MAC_MCMD_REG);
writel(0x1, data->membase + EMAC_MAC_MCMD_REG);
writel(0x0, data->membase + EMAC_MAC_MCMD_REG);