linux-kernel - Re: Architectural-Queries on integrating Sierra-MC8090 with Linux

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Message-ID: <CAHP4M8U_B7rgSeOxr+JJVJBBu1paWPSG6TCC+UJPmLOBvqKV6g@mail.gmail.com>
Date:	Thu, 11 Aug 2016 19:33:49 +0530
From:	Ajay Garg <ajaygargnsit@...il.com>
To:	linux-kernel@...r.kernel.org,
	networkmanager-list <networkmanager-list@...me.org>,
	modemmanager-devel@...ts.freedesktop.org
Subject: Re: Architectural-Queries on integrating Sierra-MC8090 with Linux

CCing NM and MM guys.

On Thu, Aug 11, 2016 at 2:23 PM, Ajay Garg <ajaygargnsit@...il.com> wrote:
> Hi All.
>
> Have posted the question on Sierra-forums
> https://forum.sierrawireless.com/viewtopic.php?f=117&t=9898
> Posting it here as well, as the activity there is relatively low, and
> this is where all the kernel-guys hand :)
>
>
> I am using a Ubuntu interfaced with a Sierra-MC8090 module.
>
> Right now MC8090 is identifed as a network-interface on Linux, made
> possible by the usage of "sierra" (serial-driver) and "sierra_net"
> (direct-ip usb-to-wwan driver) kernel-drivers. This "mostly" works,
> except that we, in the user-application, are not able to access the
> serial-file /dev/ttyUSB3 (this file is in constant usage by
> /usr/sbin/ModemManager).
>
> Now, my question is, if we disable loading the "sierra_net" driver,
> and use just "sierra" driver to communicate on the serial-port, will
> using the Sierra-Linux-QMI-SDK do the job? In particular,
>
> *
> I understand that we will now have exclusive access (please correct me
> if I am wrong) to the serial-port /dev/ttyUSB3.
>
> *
> How to do we create a socket to a particular server-port using the
> QMI-SDK? I can see in the examples that we can start a data-call for a
> profile (ConnectGSM.c), but I am unable to find how to instantiate a
> socket through which we can do regular reads/writes.
>
>
> Will be grateful to hear back from someone.
>
>
> Thanks and Regards,
> Ajay



-- 
Regards,
Ajay