I've been trying to port U-Boot to an 8248-based board from Embedded Planet (http://www.embeddedplanet.com/products/ep8248.asp). I started with the MPC8260ADS configuration and made a new board, as suggested in the README. So far, the SMC1 serial port works, the DRAM controller works, flash works, I can get to the U-Boot prompt and issue commands, etc.
However, when I try to use the FCC1 ethernet, problems occur. For example:
=> ping 192.168.2.2 Trying FCC1 ETHERNET Using FCC1 ETHERNET device sending ARP for c0a80202 ARP broadcast 1 ARP broadcast 2 ping failed; host 192.168.2.2 is not alive =>
192.168.2.2 is a valid IP, and is alive. Sniffing with tcpdump shows the following:
10:46:58.101158 Broadcast > Broadcast, ethertype Unknown (0xffff), length 60: 0x0000: ffff ffff ffff ffff ffff ffff ffff ffff ................ 0x0010: ffff ffff ffff ffff ffff ffff ffff ffff ................ 0x0020: ffff ffff ffff ffff ffff ffff ffff .............. 10:47:03.069813 Broadcast > Broadcast, ethertype Unknown (0xffff), length 60: 0x0000: ffff ffff ffff ffff ffff ffff ffff ffff ................ 0x0010: ffff ffff ffff ffff ffff ffff ffff ffff ................ 0x0020: ffff ffff ffff ffff ffff ffff ffff ..............
The PHY is a Level One (Intel) LXT971A. I can query it with U-Boot's mii commands, and it looks correct - it autonegotiates, recognizes the link, etc. The fact that I see the correct packet length and it isn't dropped suggests that the phy is at least sort-of working.
The ARP packet that's passed to fec_send() (in cpu/mpc8260/ether_fcc.c) is correct:
(gdb) print packet $9 = (void *) 0xffd2e0 (gdb) x/42xb packet 0xffd2e0: 0xff 0xff 0xff 0xff 0xff 0xff 0x02 0x00 0xffd2e8: 0x00 0x00 0x00 0x02 0x08 0x06 0x00 0x01 0xffd2f0: 0x08 0x00 0x06 0x04 0x00 0x01 0x02 0x00 0xffd2f8: 0x00 0x00 0x00 0x02 0xc0 0xa8 0x02 0x05 0xffd300: 0x00 0x00 0x00 0x00 0x00 0x00 0xc0 0xa8 0xffd308: 0x02 0x02 (gdb)
I'm very new to the whole powerpc/embedded world. Is it a correct assumption that the FCC driver in mpc8260/ether_fcc.c will work for the 8248?
Any hints or suggestions will be much appreciated.
Thanks.
Bill