EMAC_RX_CTL_REG
sun4i_emac_clear_set(sc, EMAC_RX_CTL_REG, 0, EMAC_RX_CTL_FIFO_RESET);
uint32_t v0 = sun4i_emac_read(sc, EMAC_RX_CTL_REG);
sun4i_emac_clear_set(sc, EMAC_RX_CTL_REG,
sun4i_emac_clear_set(sc, EMAC_RX_CTL_REG,
rxctl = sun4i_emac_read(sc, EMAC_RX_CTL_REG);
sun4i_emac_write(sc, EMAC_RX_CTL_REG, rxctl);