From: Alan <alan@lxorguk.ukuu.org.uk>
To: Oliver Neukum <oliver@neukum.name>
Cc: Phillip Susi <psusi@cfl.rr.com>,
Oliver Neukum <oliver@neukum.org>,
linux-kernel@vger.kernel.org
Subject: Re: interface for modems with out of band signalling
Date: Fri, 15 Dec 2006 16:44:23 +0000 [thread overview]
Message-ID: <20061215164423.26a47f14@localhost.localdomain> (raw)
In-Reply-To: <200612151709.48415.oliver@neukum.name>
> No, I am talking about how to support modems which don't have a
> command mode. These USB modems don't accept AT commands
> through the same channel as data. They take them encapsulated in special
> command messages to endpoint 0.
> How do I export this capability to user space? I am thinking about having
> two device nodes. But there may be a driver setting another precedent.
> Therefor I am asking.
ISDN4Linux provides a fake modem emulation in kernel space. The Nokia
phone drivers provide a user space manager which provides the interface.
So you've got precedents for both. If it's simply a case of splitting AT
commands off from the data and spotting guard bands and +++ you might
want to do it kernel side, if the second endpoint takes its own set of
phone control messages I guess its hairier.
prev parent reply other threads:[~2006-12-15 16:52 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-12-15 14:14 interface for modems with out of band signalling Oliver Neukum
2006-12-15 15:53 ` Phillip Susi
2006-12-15 16:19 ` Oliver Neukum
2006-12-15 16:44 ` Alan [this message]
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