unknown receiver, how to find out?

[whites11\@inwind\.it <whi...@in...>]

hello everybody
in my laptop (acer travelmate 5920G) i've got a cir irda interface.
i think this is a serial one because both lspci nor lsusb doesn't show an=
y related info.
the best info i found about the hardware is acer's description : "Consume=
r infrared (cir) receiver".
i tryed to compile lirc with a few receivers' support, but n luck.
how can i find out what the hell this receiver is?
any help is welcome