Unfortunately, Sierra secondary APP ports reply to +GCAP with
only "OK", and not their APP port number or model number. So instead
of using +GCAP, we have to use ATI to get secondary port information.
This allows us to detect which port is the APP1 port that we can
potentially use for PPP, leaving the primary port available for
control and status.
Also, some modems have up to 3 or 4 APP secondary ports, which we
need to ensure aren't used as primary. The previous check for +GCAP
handled that, but let's make it more explicit.
AT+GCAP reply:
OK
ATI reply:
Sierra Wireless, Inc.
C885
APP1
OK
See also: 3f3987e09ee762e48c1d53cb42a1288ce9f332cb (MM_06)
Both the ModemManager daemon and the mmcli will now include `libmm-glib.h' only.
We also handle two new special `_LIBMM_INSIDE_MM' and `LIBMM_INSIDE_MMCLI'
symbols, which if included before the `libmm-glib.h' library allow us to:
* Don't include the libmm-glib high level API in the ModemManager daemon, as
the object names would clash with those in the core.
* Define some of the methods of helper objects to be included only if compiling
ModemManager daemon or the mmcli.
For those who don't care about the QMI support through libqmi-glib, or if you're
stuck with glib 2.30 (libqmi-glib requires 2.32), this configure switch allows
disabling the QMI support completely.
The logic to detect cdc-wdm ports is still in place, but the QMI probing is
never launched at them. Also, all QMI-related objects won't be compiled.
Most Sierra PPP-based devices are supposed to allow PPP on the
APP1 port, which has a dumb AT parser, leaving the main port
(with the intelligent AT parser) free for status and signal strength.
But out of all the devices I've tested it with (8775, 8781, AC881,
and C885), only the C885 actually works. The rest (including three
different firmware versions for the 8775) either crash or disconnect
shortly after PPP starts.
To help figure out which devices actually support this, when
running MM in debug mode, users can set the MM_SIERRA_APP1_PPP_OK
environment variable and assume the APP1 port allows PPP. This
is only for debugging purposes.
This is the port to git master of the following commit:
commit e0242b4db7fb1556e79f6829d22edf411f9f6ba4
Author: Dan Williams <dcbw@redhat.com>
Date: Thu Aug 23 21:14:38 2012 -0500
sierra: fix detection of APP1 port
The APP1 port (which has a limited AT parser) doesn't prefix
its replies with <CR><LF> like nice modems do, and that means
it runs afoul of the echo removal bits of the AT serial port
code. We need to parse the whole string even though it's not
prefixed properly to find the APP1 string in the response.
Some sierra modems (e.g. MC7710) have a secondary port that likes to reply OK
to any AT command passed. Detect that as soon as possible, and don't consider
the Icera port probing result from that secondary port.
Different ports of the same modem may get handled by different drivers. We
therefore need to provide a list of drivers (new `Modem.Drivers' property with
signature 'as') instead of just one (removed `Modem.Driver' property with
signature 's').
$ sudo mmcli -m 0 | grep drivers
| drivers: 'qcserial, qmi_wwan'
