MS basic connect extensions: 0d3a or 9d3a?

[Ben Chan]

On Mon, Sep 10, 2018 at 8:53 AM Aleksander Morgado
<aleksander at aleksander.es> wrote:
>
> Hey
>
> On Mon, Sep 10, 2018 at 5:36 PM, Ben Chan <benchan at chromium.org> wrote:
> > Looks like the UUID for basic connect extension is pretty messed up.  It
> > isn't listed in http://compliance.usb.org/mbim/.  I'm not sure what to
> > expect. majority wins?   Worst case, we will need to carry a quirk in
> > libmbim to treat them interchangeable, sigh :(
> >
> > Service UUID = 3d01dcc5-fef5-4d05-9d3a-bef7058e9aaf
> > https://docs.microsoft.com/en-us/windows-hardware/drivers/network/mb-modem-reset-operations
> > https://docs.microsoft.com/en-us/windows-hardware/drivers/network/mb-protocol-configuration-operations--pco-
> >
> > Service UUID = 3d01dcc5-fef5-4d05-0d3a-bef7058e9aaf
> > https://docs.microsoft.com/en-us/windows-hardware/drivers/network/mb-multi-sim-operations
> > https://docs.microsoft.com/en-us/windows-hardware/drivers/network/mb-network-blacklist-operations
> > https://docs.microsoft.com/en-us/windows-hardware/drivers/network/mb-base-stations-information-query-support
> > https://docs.microsoft.com/en-us/windows-hardware/drivers/network/mb-provisioned-context-operations
> > https://docs.microsoft.com/en-us/windows-hardware/drivers/network/mb-lte-attach-operations:
> >
>
> We need to support both then. The Qualcomm-based DW5821e uses 0d3a,
> the Intel based L850-GL uses 9d3a... I'll update libmbim to
> transparently decide which one to use the first time a command of that
> service is requested.

I'm following up on L850-GL, which we made the request to add the
MBIM_CID_PCO support. It may be possible to address that in the
firmware.

libmbim could also do an initial device_services_list query to check
which UUID is defined (or, in the worst case, both are defined for
different CIDs), and then transparently select the UUID based on the
CID.

>
> --
> Aleksander
> https://aleksander.es