ENET_ECR_ETHEREN
while (HREAD4(sc, ENET_ECR) & ENET_ECR_ETHEREN)
while (HREAD4(sc, ENET_ECR) & ENET_ECR_ETHEREN)
HWRITE4(sc, ENET_ECR, ENET_ECR_ETHEREN | speed | ENET_ECR_DBSWP);
while (HREAD4(sc, ENET_ECR) & ENET_ECR_ETHEREN)