On Monday 23 January 2006 5:37 am, Mukund JB. wrote:
> Dear David,
>
> > There are other interfaces for both full/low speed hosts ("USB 1.1" as
> > well as "USB 2.0") and for high speed ones (only "USB 2.0"). Those
> are
> > common primarily because of PCs. Where gate count matters, silicon
> > vendors may find it better to avoid "standard" register interfaces.
> >
> > I've used high speed hosts that aren't EHCI, and full/low speed ones
> > that aren't OHCI or UHCI ...
>
> If that is the case, it will involve rewriting the complete USB stack
> for that particular hardware.
Just the controller drivers, not the whole stack.
A thing that would necessitate rewriting the complete stack is
using some non-Linux, non-GPL operating system...
> Can you provide me a link describing all the possible scenarios that can
> exist when connecting two USB devices (covering cases like ... both are
> OTG, one is OTG)?
Easily derived from the specs you have now started reading.
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