NEO 1973 usb change needed

Felipe Balbi me at
Mon Mar 3 23:28:35 CET 2008

On Mon, Mar 03, 2008 at 03:17:03PM -0700, Shawn Rutledge wrote:
> On Mon, Mar 3, 2008 at 2:59 PM, Felipe Balbi <me at> wrote:
> >  I'm trying to start helping openmoko project and I noticed a "bug" in
> >  usb hardware:
> >
> >  In order to get otg certification neo's usb receptacle should be changed
> >  to a micro-AB receptacle instead of a mini-B receptacle.
> I think you are right that it should not be a "slave only" jack,
> considering that the device can also be a master.
> With some difficulty I managed to find a mini-AB to mini-B cable for
> my Zaurus (and now they decided it's obsolete, great!), but I don't
> think I've yet seen a micro-AB device or cable.  So hopefully the
> phone would ship with the useful cables (one to go to a PC and one
> with a mini-B plug to go to peripherals).

So you should check what we did on nokia n810 (I'm responsile for usb on
nokia internet tablets on kernel-side).

Anyways, the device won't get usb otg compliance with mini-b receptacle
in it.

Also, I didn't see an otg transceiver on the hw list, is there any ? We
need an otg transceiver to sample the id_pin status and switch roles
(host/peripheral) based on that id_pin: if grounded we go to host (a)
states, if floating we go to peripheral (b) states.

We also need an otg targeted peripheral list and some other stuff i can
list if it's needed.

Best Regards,

Felipe Balbi
me at

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