Re: [PATCH] USB: option: Add USB ID for Novatel Ovation MC551

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Dan Williams <dcbw@xxxxxxxxxx> writes:

> I'll do some Windows traces to see if it does use QMI on the Ethernet
> endpoints.  I know it doesn't do QMI on any of the serial interfaces
> (ff/ff/ff) based on the Windows drivers.  I could be completely wrong,
> but I'm really expecting QMI on this device, given that it's a MDM9600.

The firmware doesn't need to export a QMI interface even if the chip
supports it.  The Sierra Wireless MC77xx modules in Direct IP mode are
good examples of this.  And I believe the same goes for most (all?) of
the Sierra Wireless LTE USB sticks.  I assume they use MDM9200 or
MDM9600 chips, but only support Sierras Direct IP protocol with HIP
embedded in CDC instead of QMI.

There is of course always the possibility that the device can be
switched into a "dumber" mode where QMI is available.  But you'll
probably need a hint from the vendor to find out how that can be done,
if at all possible.

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