Re: [PATCH] USB host CDC Phonet network interface driver

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On Friday 24 July 2009 15:01:19 ext Oliver Neukum wrote:
> Am Mittwoch, 22. Juli 2009 11:15:34 schrieb Marcel Holtmann:
> > > > The AT stuff is really problematic. Look at the hoops ISDN and
> > > > software modem drivers go through to emulate AT commands. I know even
> > > > of a CDC-ACM modem which can't deal with AT commands inline (that's
> > > > within spec). It seems to me we should have a modem API in kernel.
> > >
> > > For devices which don't deal in AT commands probably but for devices
> > > whose firmware provides an AT command interface over serial I would
> > > disagree.
> >
> > I fully agree here. Even if you think you get AT commands under control,
> > you really won't in the end. That standard is so wildly mis-interpreted
> > that it is not even funny anymore.
>
> For these devices we could at least separate the data channel from the
> control channel.

"These" as in AT devices? You want a line discipline to multiplex AT commands 
inspite of PPP? I wonder if that'd work.

-- 
Rémi Denis-Courmont
Nokia Devices R&D, Maemo Software, Helsinki

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