I'm currently working with Zachary Landau's port of the 5282, trying to get the network running correctly on a new 5282 based board with no pre-loader that boots from external flash. I'm running into some generic u-boot issues and I was running if anyone could help point me in the right direction. Any general comments or discussion on the items below would be helpful.
FEC_STRUCTURE This seems to be the subject of some debate, but looking over it, the fec structure in the CVS does appear to be incorrect. For instance, it only defines a single hash table uint fec_hash_table_high; /* upper 32-bits of hash table */ uint fec_hash_table_low; /* lower 32-bits of hash table */] Even thought the datasheet clearly indicates that there are two. How could this possibly be correct? Zach's structure does appear to be the correct one, and in fact is the only one I've had any success with at all.
HASH TABLES: Zach's code was clearing the individual hash table, but not the group hash table, The new code is currently clearing both tables, although I'm not technically sure this is correct as I'm really not that experienced with ethernet hash tables.
SPEED: The new code can download intact linux images with tftp, but it only works if ET_DEBUG is enabled. If it's not everything seems to run too fast and the code chokes itself(sends out big bursts of packets and then doesn't respond to the big bursts it gets back). How can I tell it to slow down and wait for responses without debug statements? Is there a place for this?
ICMP: Once the TFTP transaction gags, my tftpd server turns around and starts trying to ping the client to see if it's alive, but it never responds. Should it be? does the stack support this?
thx, NZG.