Do you have the omap3 manual?  I think that details the correct backend pin mode.  Steve S sent out a pointer to it on one of the threads. 
I'm definitely interested in this functionality as well. 

On Jul 27, 2011, at 5:13 AM, Alexander Thomas wrote:

OK, I have figured out that I need to:
1. disable EHCI and enable OHCI support in the kernel,
2. remove ehci init code from board-overo.c and add missing ohci init code.

I have to call usb_ohci_init with a ‘ohci_hcd_omap_platform_data’ struct, but I have no idea what value I should use for port_mode[1]. Given that the ehci struct uses EHCI_HCD_OMAP_MODE_PHY, it seems logical that I should use one of these four possible ohci_omap3_port_mode values:

    OMAP_OHCI_PORT_MODE_PHY_6PIN_DATSE0,
    OMAP_OHCI_PORT_MODE_PHY_6PIN_DPDM,
    OMAP_OHCI_PORT_MODE_PHY_3PIN_DATSE0,
    OMAP_OHCI_PORT_MODE_PHY_4PIN_DPDM

Which one is correct for the Overo+Tobi?

Alexander

On Mon, Jul 25, 2011 at 6:29 PM, Victhor <victhor.foster@gmail.com> wrote:
There is a OHCI kernel module for the OMAP3 USB controller, but I never
had the opportunity to test it.
>
> On Jul 25, 2011, at 10:02 AM, Alexander Thomas wrote:
>
> > On Mon, Jul 25, 2011 at 4:43 PM, Steve Modica
> > <modica@small-tree.com> wrote:
> >
> >         On Jul 25, 2011, at 7:30 AM, Alexander Thomas wrote:
> >
> >         > Hi,
> >         > Is there any expansion board for the Overo COMs that has
> >         an Ethernet port and allows to directly attach a full-speed
> >         USB device? We already have a Tobi but it proves to only
> >         support high-speed devices. Unless I'm mistaken the only way
> >         to connect a full-speed device like an USB audio device is
> >         to connect it through a hub, which would complicate our
> >         design considerably if we want to keep it a single unit.
> >
> >
> >         You can put a full speed device on the OTG port.  It's an AB
> >         port so there's nothing hard about that.  Get a miniAB to B
> >         cable and you're all set.
> >
> > Except for the fact that the OTG port only delivers up to 100mA and
> > the audio device requires 400mA.
> >
> > The strange thing is that the OMAP3530's specifications include
> > “High-Speed/Full-Speed/Low-Speed Multiport USB Host Subsystem”. Why
> > does the port on the Tobi only support high-speed? Can it be
> > switched to low/full speed mode? We couldn't care less if that would
> > mean losing high-speed.
> >
>
>
> The Host A port has the ability to support Full Speed devices *but*
> you have to put the chip into OHCI mode and that requires a different
> back end interface (which appears to be missing).  So if you want to
> do this, you have to create that backend interface
>
> >
> > Alexander
> >
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>
>
>
>
>
>
>
>
>
>
> ------------------------------------------------------------------------------
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> This modeling tool is based on patent-pending intellectual property that
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> ments, worldwide.  Store less, Store more with what you own, Move data to
> the right place. Try It Now! http://www.accelacomm.com/jaw/sfnl/114/51427378/
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