ETH_E2P_CMD_BUSY_
err = lan78xx_wait_for_bits(sc, ETH_E2P_CMD, ETH_E2P_CMD_BUSY_);
val = ETH_E2P_CMD_BUSY_ | ETH_E2P_CMD_READ_;
if (!(val & ETH_E2P_CMD_BUSY_) ||
if (val & (ETH_E2P_CMD_BUSY_ | ETH_E2P_CMD_TIMEOUT_)) {