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PL Ethernet through SFP

cone83

Hi!

Has anybody been able to use the SFP port with PL ethernet? I'm trying to replicate the design from XAPP1082. I've been closely following the provided example design and copied the device tree. I've set SW10 to OFF, OFF, and SW11 to OFF, OFF, ON, OFF, which to my understanding should provide the required 125 MHz. In the SFP slot I plugged a 1000Base-T RJ45 module from Delock.

 

Unfortunately it doesn't seem to work. When booting linux, I get the following output during boot:

 

xilinx_axienet a0500000.axi-ethernet: TX_CSUM 2
xilinx_axienet a0500000.axi-ethernet: RX_CSUM 2
libphy: Xilinx Axi Ethernet MDIO: probed

 

I think that looks fine. But if I'm trying to activate the network trough ifup, I get the following:

 

net eth1: Promiscuous mode disabled.
net eth1: Promiscuous mode disabled.
ip: RTNETLINK answers: File exists
xilinx_axienet a0500000.axi-ethernet eth1: Error setting Axi Ethernet mac speed


I guess that only the last message is an issue. I don't really know what could be the cause for this. I get the same results even when unplugging the SFP module. Are there any ways to narrow this problem down?

 

Thanks

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  • 0

    Oh dear. Having another close look at XAPP1082, I see that they program the Phy in the SFP module over I2C in the FSBL. I had a close look at the Mini-ITX schematics and compared them to the schematics of the ZC706 board that is used in XAPP1082. The SFP pins are not clearly labeled in the Mini-ITX schematics, but I guess that SDA is SFP_MOD_DEF2 and SLC is SFP_MOD_DEF1. Unfortunately they are not connected to the I2C switch like for the ZC706 board, but instead to bank 9.

     

    So, I guess that I'll have to implement the I2C communication for programming the SFP Phy in PL. Does anyone have an idea for an easier solution?

  • 0 in reply to cone83

    Hi, Currently, I met the same problem as you.I also study XAPP1082 and adapted it to picozed.Have you solved the problem?

    Hope your response.

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