OpenWrt on Netasq u30s with internal switch

Hy every body

I'm an OpenWrt's beginner and I try to install it on a Netasq u30s.

I use x86 OpenWrt image and I'm able to connect on the router's port 1.

But other ports are managing by atheros AR8328 and I just see 1 interface named eth1. When I try to plug cable on one of this ports, there are no flashing led and no event....

How can I work with this ports ?

nobody have an idea ?