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

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Message-Id: <200907241401.20262.oliver@neukum.org>
Date:	Fri, 24 Jul 2009 14:01:19 +0200
From:	Oliver Neukum <oliver@...kum.org>
To:	Marcel Holtmann <marcel@...tmann.org>
Cc:	Alan Cox <alan@...rguk.ukuu.org.uk>,
	" Rémi Denis-Courmont" 
	<remi.denis-courmont@...ia.com>,
	ext Dan Williams <dcbw@...hat.com>,
	"netdev@...r.kernel.org" <netdev@...r.kernel.org>,
	"linux-usb@...r.kernel.org" <linux-usb@...r.kernel.org>
Subject: Re: [PATCH] USB host CDC Phonet network interface driver

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.

	Regards
		Oliver

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