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    SubjectRe: [PATCH 2/2] usb: serial: option: add Cellient MPL200 card
    On Tue, 6 Oct 2020 09:02:01 +0200
    Johan Hovold <johan@kernel.org> wrote:

    > On Mon, Oct 05, 2020 at 02:07:23PM +0200, Wilken Gottwalt wrote:
    > > On Mon, 5 Oct 2020 18:36:36 +0700 Lars Melin <larsm17@gmail.com> wrote:
    > > > On 10/5/2020 18:06, Johan Hovold wrote:
    >
    > > > > Do you remember the interface layout and why you blacklisted interface
    > > > > 1?
    >
    > > > It is very likely that Cellient has replaced the VID with their own and
    > > > kept the PID, it is something other mfgrs has done when buying modules
    > > > from Qualcomm's series of devices with predefined composition.
    > > >
    > > > The MS Windows driver for 05c6:9025 describes the interfaces as:
    > > >
    > > > MI_00 Qualcomm HS-USB Diagnostics 9025
    > > > MI_01 Android Composite ADB Interface
    > > > MI_02 Qualcomm HS-USB Android Modem 9025
    > > > MI_03 Qualcomm HS-USB NMEA 9025
    > > > MI_04 Qualcomm Wireless HS-USB Ethernet Adapter 9025
    > > > MI_05 USB Mass Storage Device
    > > >
    > > > where the net interface is for QMI/RMNET.
    > > > It fully matches the blacklisting Wilken has done for 2692:9025
    > >
    > > Does your device have a GPS connector? Mine had not and I'm not sure
    > > if the description of MI_01 is actually correct. I remember looking at
    > > this port and seeing bogus NMEA data.
    >
    > Well if it's NMEA then the interface shouldn't be blacklisted (even if
    > the values are bogus on your device), but if it's ADB it should be as
    > that is handled by userspace.
    >
    > Here's some lsusb output from a Cellient MPL200 that still uses the
    > Qualcomm VID:
    >
    > https://www.mail-archive.com/modemmanager-devel@lists.freedesktop.org/msg04523.html
    >
    > which gives some support to Lars's hypothesis. I guess we'll just keep
    > the first interface reserved.

    Lars and Johan are right here. I found an older external Gobi driver
    where I actually added comments saying interface 1 is ADB and interface 3
    is NMEA delivering only zeroed values because of the missing antenna
    connector, at least for the models I had access to.

    Will

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