You should be able to connect a USB2 hub support USB2 high speed
(480 Mbps) to Tobi USB host port (I have a Summit expansion card.
I guess the USB host port should be similar/the same). Then you
can connect any USB1/2 device to it (it's up to the hub support.).
Another catch is you'd better use a self powered USB2 hub (i.e.,
hub with extern PS) since the port can't provide enough power most
of the time. The hub powered from on board USB port may not work or
at least unstable from my experiment.
The host port itself can only accept high speed (ehci), low power
devices such as USB2 thumb drives. I am not sure if this is the
driver software or actual hardware limit.
The OTG port is configured as host port for the Overo software
I used (kernel 2.6.x, Angstrom). It supports both full (like USB
audio devices, KB, etc) and high speed USB devices (USB storage
devices). I am wondering if I need to patch kernel to get it work
for OTG (as device).
From my experiment so far.
Date: Tue, 20 Mar 2012 09:58:05 -0400
From: "William Pretty Security"<bill.pretty@...>
Subject: Re: [Gumstix-users] Can't see USB device's from Overo
Because it is a high speed ONLY port L
I have had a USB-2 device connected to it. Like a USB-2 hub. The gotcha is
that you can only hook USB-2 devices to the hub .
Them's the breaks