FAQ for XMC4800 EtherCAT

Hello all,

we want to build our own EtherCAT slave based on an XMC4800. So far something is runing on the eval board.
Now, we have to build our own Hardware. I thought let's use the BCM5241 PHY like on the eval board but I won't get a datasheet from broadcom. I also found the PHY list from Beckhoff but It seems that only this BCM5241 was tested.
Has anyone practical experience with other PHYs and maybe neccessary changes in the source code? Or does anyone knows a way to get a datasheet from broadcom (for small series customers)?

Thanks in advance,
Martin