From mboxrd@z Thu Jan 1 00:00:00 1970 From: "=?iso-8859-15?q?R=E9mi?= Denis-Courmont" Subject: Re: [PATCH] USB host CDC Phonet network interface driver Date: Fri, 24 Jul 2009 15:14:17 +0300 Message-ID: <200907241514.18871.remi.denis-courmont@nokia.com> References: <1248177515-12712-1-git-send-email-remi.denis-courmont@nokia.com> <1248254134.28545.111.camel@violet> <200907241401.20262.oliver@neukum.org> Mime-Version: 1.0 Content-Type: Text/Plain; charset=iso-8859-15 Content-Transfer-Encoding: QUOTED-PRINTABLE Cc: Marcel Holtmann , Alan Cox , ext Dan Williams , "netdev@vger.kernel.org" , "linux-usb@vger.kernel.org" To: ext Oliver Neukum Return-path: Received: from smtp.nokia.com ([192.100.105.134]:35482 "EHLO mgw-mx09.nokia.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751798AbZGXMMj convert rfc822-to-8bit (ORCPT ); Fri, 24 Jul 2009 08:12:39 -0400 In-Reply-To: <200907241401.20262.oliver@neukum.org> Content-Disposition: inline Sender: netdev-owner@vger.kernel.org List-ID: 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 kno= w even > > > > of a CDC-ACM modem which can't deal with AT commands inline (th= at's > > > > within spec). It seems to me we should have a modem API in kern= el. > > > > > > For devices which don't deal in AT commands probably but for devi= ces > > > whose firmware provides an AT command interface over serial I wou= ld > > > disagree. > > > > I fully agree here. Even if you think you get AT commands under con= trol, > > you really won't in the end. That standard is so wildly mis-interpr= eted > > that it is not even funny anymore. > > For these devices we could at least separate the data channel from th= e > control channel. "These" as in AT devices? You want a line discipline to multiplex AT co= mmands=20 inspite of PPP? I wonder if that'd work. --=20 R=E9mi Denis-Courmont Nokia Devices R&D, Maemo Software, Helsinki