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Ping problem at uboot

Poh Boon Teo
Intellectual 710 points

Hi,

We have developed a board based on DM8168 and has an Ethernet connection to EMAC0 with a Micrel KSZ9021GN PHY operating in 10/100M, there is a problem when we attempt to do a ping in uboot. It looks like we were able to receive frames but not able to send out frames, we found out this by reading the MAC counters.

The interesting part is that we were able to observe the TXEN pin toggle when the frames are sent but the data lines remained quiet throughout. We also noticed that the PCS 100M link is down on the PHY side which we suspect the K code did not even make it from the MAC to the PHY.

Anyone can tell us what are we missing out?

Thanks and regards,

poh boon