Re: Sierra wireless Model: MC8790 qmi_wwan? Howto to test?

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On Wed, 2012-05-16 at 23:46 +0200, Bjørn Mork wrote:
> Thomas Schäfer <tschaefer@xxxxxxxxxxx> writes:
> 
> >> Actually, the K3565-Z doesn't support QMI either :)  It does have the
> >> possibility of a pseudo-ethernet port, but that's a custom
> >> implementation by ZTE's firmware team that isn't at all QMI related.
> >> Thankfully on the K3565-Z it's more or less standard and we don't have
> >> to go to the lengths to support it that we do for QMI-based devices.  It
> >> appears the K3565-Z is based on the MDM6290 which is the same chipset
> >> that's in your Sierra 8790 :)  Thus no QMI.
> >
> > I can't follow. I use the qmi-script and libs  from Bjørn Mork to get the 
> > pseudo-ethernet to work and you say there is no qmi?
> >
> > Ok, you are the expert.
> >
> > libqmi (zte-k3565z)says:
> >
> > [24 Apr 2012, 18:14:47] [Debug] Checking version info...
> > [24 Apr 2012, 18:14:47] [Debug] [/dev/cdc-wdm0] QMI Device supports 4 
> > services:
> > [24 Apr 2012, 18:14:47] [Debug] [/dev/cdc-wdm0]    ctl (1.2)
> > [24 Apr 2012, 18:14:47] [Debug] [/dev/cdc-wdm0]    wds (1.3)
> > [24 Apr 2012, 18:14:47] [Debug] [/dev/cdc-wdm0]    dms (1.2)
> > [24 Apr 2012, 18:14:47] [Debug] [/dev/cdc-wdm0]    nas (1.0)
> > [24 Apr 2012, 18:14:47] [Debug] Asynchronously getting IDs...
> > [/dev/cdc-wdm0] Device IDs retrieved:
> >          ESN: 'not available'
> >         IMEI: '357867027052282'
> >         MEID: 'not available'
> > [24 Apr 2012, 18:14:47] [Debug] Client CID released
> 
> I am certainly no expert on this either, but if that works then the
> device must support QMI :-)
> 
> 
> >> (Technically QMI and pseudo-ethernet interfaces are completely
> >> unrelated, it just happens that every Qualcomm-derived device that
> >> supports QMI has the capability of a pseudo-ethernet interface even if
> >> the OEM's firmware team doesn't actually expose it.)
> >
> > I try to understand.
> 
> The MDM6200 is listed as a Gobi chipset by Qualcomm, but I have no idea
> how that relates to MDM6290...

I stand corrected.

A document I found for the Sierra AirCard Watcher (Qualcomm Gobi
Anywhere Edition) does indeed list the following parts as supported:
Gobi 3000, MC7700, MC7750, MC8790.  So that may confirm that the 8790 is
a Gobi-class device and should also support QMI.

And clearly the K3565-Z also supports QMI as you've found.  I guess we
can assume anything based on the MSM6290 and MSM6246 support QMI if the
firmware engineers bothered to expose it.

The first references to QMI that I found were the Android kernel sources
from 2008 (the rmnet driver) and all those  phones were based on the
MSM72xx chips.  Unless somebody from Qualcomm clarifies, I guess I
wouldn't expect anything earlier than 2008/2009 to support QMI.  Actual
Gobi devices debuted in mid-2008 and did have QMI.  But Qualcomm was
also producing chips long after 2008 in older families (MSM68xx) that
didn't support QMI, only DIAG.

Dan

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