Part Number:66ak2e05
Tool/software: Linux
I have a design that needs to be able to use one of the 10Gig XFI ports and run it at 1Gig MAC to MAC. The Linux driver looked straight forward enough so I set the link-interface variable in the k2e-net.dtsi Linux file to SGMII_LINK_MAC_MAC and it looks like it setup the SGMII MR_ADV_ABILITY correctly to 0x9801 and the SGMII Control Register to a 0x20. The MAC Control Register gets set to 0x00840020.
We are unable to get a link using this setup. Has anyone else tried to do this? Are there other things that need to be modified? I have used the 10Gig before as a 10Gig connection but it was on another design. Are there reference clocks that need to change in order to run a 1Gig on the 10Gig interface?