Re: [RFC] Power Management Policies

[David Brownell <david-b@pacbell.net>]

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On Thursday 28 April 2005 1:23 am, Pavel Machek wrote:
> Hi!
> 
> > > > AFAICT the hardware folk are more than ready to start providing hand-held
> > > > devices (PDA-ish, vs luggable laptops) with USB host capabilities.  But
> > > > WinCE isn't ready for that yet though... ergo products don't do it yet.
> > > > Linux has less trouble, since market positioning doesn't interfere.  :)
> > > 
> > > USB zauruses could do that for >2 years now,
> > 
> > Which ones?  The ones I know about have a peripheral controller,
> > not a host controller.   There's a recent iPaq that uses OHCI
> > on a pxa27x to contact an on-board bluetooth adapter.  But AFAIK,
> > PDAs with an USB host _connector_ is pretty rare.  (There's a
> > CF/IO card adapter I've seen, but that's not quite the same.)
> 
> sl-5500 has peripheral controller, but sl-5600 and newer should have a
> host controller. [Unfortunately mine is 5500.]

I think you're wrong about all except possibly the very latest ones
using pxa27x chips.  The pxa25x based products would need a separate
controller chip to get host functionality.  I know for a fact that
even the C-860 doesn't have one integrated; folk use that CF/IO card,
with an sl811hs driver, if they crave a USB keyboard or flashdisk.

- Dave
 

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