[U-Boot-Users] MPC8260 FCC ethernet fails

[wyu hotmail]

If you configured the Tx and Rx clocks wrong (Rx clk was connected to Tx 
and Tx clk was connected to Rx), FCC can still works, but it will lost most 
of the packets.

yuwp

>From: "Ho Lee" <flyduck at linuxkernel.net>
>To: "u-boot-users" <u-boot-users at lists.sourceforge.net>
>Date: Fri, 4 Jun 2004 18:43:22 -0700
>Subject: [U-Boot-Users] MPC8260 FCC ethernet fails.
>
>Hi Folks,
>
>I am porting u-boot 1.1.1 to MPC8260 based board, which uses FCC3
>for ethernet. Basicially it is working; it sends and receives ICMP packets 
(ping)
>and DHCP packets. But when I try to download a file via TFTP protocol, it
>loses packets frequently (once per about 10 packet transfers), eventually
>results in timeout. I monitor the packet transfers by tcpdump, and the 
server
>surely sends a packet, but the buffer descriptor of FCC says the RX buffer
>is empty. What may cause this problem? I would appreciate any comments.
>
>Regards,
>Ho