Hi everyone!
I am porting U-Boot to "Men mikro elektronik" PP01 module (MPC5200). The FEC is integrated on the MPC5200 and the PHY is a LXT971ALE transceiver.
U-Boot boots and recognizes the Ethernet device (I can read the PHY transceiver registers, change the LED status, etc.), but when I try to ping a target the system freezes (and the Watchdog resets the board). The behavior is just the same with tftp or bootp.
I am sure it is not a hardware problem, as I can transfer files (for example u-boot.bin) from a computer to the same module using the original monitor (MENMON).
From the debugging information *it seems the code fails in the function
"mpc5xxx_fec_recv"*. Furthermore, analyzing the network with Ethereal I can observe an ARP request generated by the PING and the corresponding answer (at this moment the watchdog resets the board). If I ping a non existent address the timer expires and I receive a "ping failed; host 192.168.1.25 is not alive" (Ethereal detects the ARP request, but of course, there is not an ARP answer).
Any idea? Thanks in advance.
Best regards, Felipe.
P.S.: I paste below the debugging info
*======================================================* *Ping to a non existent address (No answer)* *======================================================* => ping 192.168.1.22 Mii reg 0: 0x0000 Mii reg 1: 0x0000 Mii reg 2: 0x0000 Mii reg 3: 0x0000 Mii reg 4: 0x0000 Mii reg 5: 0x0000 Mii reg 6: 0x0000 Mii reg 7: 0x0000 Mii reg 8: 0x0000 Mii reg 16: 0x0000 Mii reg 17: 0x0000 Mii reg 18: 0x0000 Mii reg 19: 0x0000 Mii reg 20: 0x0000 Ethernet task stopped mpc5xxx_fec_init... Begin tfifo_status: 0x00010000 tfifo_alarm: 0x00000080 Mii reg 0: 0x1000 Mii reg 1: 0x782d Mii reg 2: 0x0013 Mii reg 3: 0x78e2 Mii reg 4: 0x01e1 Mii reg 5: 0x41e1 Mii reg 6: 0x0007 Mii reg 7: 0x2001 Mii reg 8: 0x0000 Mii reg 16: 0x0084 Mii reg 17: 0x4780 Mii reg 18: 0x0000 Mii reg 19: 0x0000 Mii reg 20: 0x0422 mpc5xxx_fec_init... Done Using FEC ETHERNET device sending ARP for c0a80116 ARP broadcast 1 tbd status: 0x0000 tbd_scrub: fec->cleanTbdNum = 48, fec->usedTbdIndex = 0 Tx Buffer Descriptor ring (tbd) limpo SDMA_TASK_ENABLE, fec->tbdIndex = 1 + ------------------------------------------------------------------------------------------------------------------------------------------2 tbd status: 0x0c00 tbd_scrub: fec->cleanTbdNum = 47, fec->usedTbdIndex = 0 SDMA_TASK_ENABLE, fec->tbdIndex = 2 + ------------------------------------------------------------------------------------------------------------------------------------------0 Mii reg 1: 0x782d Mii reg 2: 0x0013 Mii reg 3: 0x78e2 Mii reg 4: 0x01e1 Mii reg 5: 0x41e1 Mii reg 6: 0x0007 Mii reg 7: 0x2001 Mii reg 8: 0x0000 Mii reg 16: 0x0084 Mii reg 17: 0x4780 Mii reg 18: 0x0000 Mii reg 19: 0x0000 Mii reg 20: 0x0422 Ethernet task stopped ping failed; host 192.168.1.22 is not alive =>
*======================================================* *Ping to a existent address * *======================================================* => ping 192.168.1.1 Mii reg 0: 0x1000 Mii reg 1: 0x782d Mii reg 2: 0x0013 Mii reg 3: 0x78e2 Mii reg 4: 0x01e1 Mii reg 5: 0x41e1 Mii reg 6: 0x0007 Mii reg 7: 0x2001 Mii reg 8: 0x0000 Mii reg 16: 0x0084 Mii reg 17: 0x4780 Mii reg 18: 0x0000 Mii reg 19: 0x0000 Mii reg 20: 0x0422 Ethernet task stopped mpc5xxx_fec_init... Begin tfifo_status: 0x00010000 tfifo_alarm: 0x00000080 Mii reg 0: 0x1000 Mii reg 1: 0x782d Mii reg 2: 0x0013 Mii reg 3: 0x78e2 Mii reg 4: 0x01e1 Mii reg 5: 0x41e1 Mii reg 6: 0x0007 Mii reg 7: 0x2001 Mii reg 8: 0x0000 Mii reg 16: 0x0084 Mii reg 17: 0x4780 Mii reg 18: 0x0000 Mii reg 19: 0x0000 Mii reg 20: 0x0422 mpc5xxx_fec_init... Done Using FEC ETHERNET device sending ARP for c0a80101 ARP broadcast 1 tbd status: 0x0000 tbd_scrub: fec->cleanTbdNum = 48, fec->usedTbdIndex = 0 Tx Buffer Descriptor ring (tbd) limpo SDMA_TASK_ENABLE, fec->tbdIndex = 1 + <<<----After the "+" the system hangs.