Dell 5570 (Sierra) supported?

[Dan Williams]

On Tue, 2014-11-25 at 11:37 -0600, Dan Williams wrote:
> On Tue, 2014-11-25 at 18:27 +0100, Aleksander Morgado wrote:
> > On Tue, Nov 25, 2014 at 3:31 PM, Manuel Lauss <manuel.lauss at gmail.com> wrote:
> > >>> <debug> [000000.007862] [mm-plugin-manager.c:640] build_plugins_list(): (Plugin Manager) [cdc-wdm0] Found '2' plugins to try...
> > >>> <debug> [000000.007863] [mm-plugin-manager.c:644] build_plugins_list(): (Plugin Manager) [cdc-wdm0]   Will try with plugin 'Novatel'
> > >>> <debug> [000000.007864] [mm-plugin-manager.c:644] build_plugins_list(): (Plugin Manager) [cdc-wdm0]   Will try with plugin 'Generic'
> > >>> <debug> [000000.007871] [mm-plugin.c:767] mm_plugin_supports_port(): (Novatel) [cdc-wdm0] probe required: 'at'
> > >>> <debug> [000000.007873] [mm-port-probe.c:1353] mm_port_probe_run(): (usbmisc/cdc-wdm0) launching port probing: 'at'
> > >>
> > >>
> > >> This doesn't look so good, though...  Why do we end up probing this as
> > >> an 'at' port? No cdc-wdm0 device owned by the cdc_mbim driver should
> > >> ever be probed as anything but MBIM.  I don't know how this device
> > >> reacts, but there is a fair chance that some MBIM firmwares will barf at
> > >> random AT commands bveing thrown at them.
> > >
> > 
> > The Novatel plugin is conflicting here it seems.
> 
> Because "Dell":
> 
>     static const gchar *subsystems[] = { "tty", "net", "usb", NULL };
>     static const guint16 vendors[] = { 0x1410, /* Novatel */
>                                        0x413c, /* Dell */
>                                        0 };
> 
> I'm not sure how to further restrict to Novatel-only devices though,
> given that the vendor ID can be anything (Dell, HP, whatever).  I'm not
> sure there's a single AT command that works on all the AT-only Novatel
> modems, though we could certainly put together a list that covers 97% of
> them at least.

The case we care about for Novatel is AT-only devices.  For those, here
is a list of commands we can use to identify them and some sample
replies.  Built from the XU870 (Dell Wireless 5510), EX725, S720, E362.

We should only do this probing if the following are true:

1) The device only has AT ports; eg it does *not* have any QMI, MBIM, or
"net" ports

2) The device does *not* report LTE capabilities via ATI or GCAP

Early Novatel QMI-capable devices (like the E362) support these commands
(at$nw*) but of course we don't want to treat them as AT-only Novatel.

=======

ati1
Manufacturer: Novatel Wireless Incorporated
Manufacturer: NOVATEL WIRELESS INCORPORATED

AT+GMI
Novatel Wireless Incorporated
NOVATEL WIRELESS INCORPORATED

at$nwdegc   (GSM/UMTS only)
(non-error response sufficient)

=======

If for some reason those don't work, here are some more esoteric ones
that we could potentially use:

AT$NWHFP?   (gsm only)
AT$NWCSQ    (gsm only)
AT$NWWDIS?  (gsm only)
AT$NWERR?   (gsm only)
AT$NWCFT?   (gsm only)
AT$NWRAT?   (gsm only)
AT$NWLTIME  (cdma only)
at$nwrssi   (cdma only)

Dan