+ if (is_c45) {
+ frame_start = FEC_MMFR_ST_C45;
+
+ /* write address */
+ frame_addr = (regnum >> 16);
+ writel(frame_start | FEC_MMFR_OP_ADDR_WRITE |
+ FEC_MMFR_PA(mii_id) | FEC_MMFR_RA(frame_addr) |
+ FEC_MMFR_TA | (regnum & 0xFFFF),
+ fep->hwp + FEC_MII_DATA);
+
+ /* wait for end of transfer */
+ time_left = wait_for_completion_timeout(&fep->mdio_done,
+ usecs_to_jiffies(FEC_MII_TIMEOUT));
+ if (time_left == 0) {
+ netdev_err(fep->netdev, "MDIO address write timeout\n");
+ ret = -ETIMEDOUT;
+ goto out;
+ }
+
+ frame_op = FEC_MMFR_OP_READ_C45;
+
+ } else {
+ /* C22 read */
+ frame_op = FEC_MMFR_OP_READ;
+ frame_start = FEC_MMFR_ST;
+ frame_addr = regnum;
+ }
+