FEC problems on mpc852

Hi,

I am having some problems getting the FEC to work, perhaps someone on the list has seen something like it and can help me out?

The problem occurs in fec_send (in cpu/mpc8xx/fec.c): the BD_ENET_TX_READY bit is set but never cleared, indicating that the packet is ready to send but the hardware is not processing it. The receive side works fine: packets are received and processed as expected. So, I do not suspect the physical path to the outside world. Anybody any ideas what could cause this sort of behaviour? Any known problems with the 852T? What can I look at to find out what is going on? By the way, this is on u-boot 0.4.4.

Best regards,
Chris Simmonds

Dear Chris,

Check the clock routing for your Tx side. Maybe there is no Tx clock so the bits don't get clocked out?

Best regards,

Wolfgang Denk

Software Engineering:  Embedded and Realtime Systems,  Embedded Linux
Phone: (+49)-8142-4596-87  Fax: (+49)-8142-4596-88  Email: wd at denx.de
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