Re: I: Sierra.c USB Serial Driver FAQ/Feature Request

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On 08/14/2013 06:03 PM, Dan Williams wrote:
snip...
> It's almost certainly not the domain of the driver to switch this mode,
> it's the responsibility of userland.  Kernel drivers must only talk to
> the device, they are not supposed to do any kind of policy or switching.
> Also, it would have to be a choice to switch, since some users may
> already be using the out-of-tree Beceem WiMAX stack and drivers and we
> can't screw it up for them.
>
> It's possible that we could determine the current mode via the
> proprietary QCDM using the "modepref" tool from ModemManager sources:
>
> http://cgit.freedesktop.org/ModemManager/ModemManager/tree/libqcdm/tests
>
> but QCDM has no "WIMAX" option that I'm aware of, so I'd be quite
> curious to see what modepref reports when the device is in 4G-only mode.
> I've attached an x86_64 build of modepref, give it a shot on ttyUSB1,
> ttyUSB2, or ttyUSB3 and see what comes out:
>
> modepref /dev/ttyUSB1 --debug
>
> Thanks,
> Dan
I ran modepref in both 3G and 4G modes. Output attached. They look
identical to me. Anything stand out?

<<attachment: AC250U_modepref_results.zip>>


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