Problems with Cyclone IV and DP83848C

Yes, it looks like the TSE isn't sending the packet further, which is odd because it looks like a broadcast packet. I didn't have time to check your project yesterday, but I just did and I don't see anything wrong in it.

I see that your driver is writing CMD_CONFIG=0x04000203. It does enable both tx and rx, but it also sets RX_ERR_DISC, that tells the TSE to discard erroneous frames. Usually this is better, but in order to debug your system you could try and set it to 0 (CMD_CONFIG=0x00000203) and see if something gets sent.

You can also enable the statistics (in the TSE settings in QSys) and then read the counters from your software to see if anything changes.