RFC: aleksander/qmi-firmware-update branch

Tang Nguyen tang_nguyen at yahoo.com
Fri Dec 9 17:38:21 UTC 2016


Sierra Wireless claims the MC7455 supports multi carrirer on a single module.  So, they offer space to keep multiple firmware for this purpose.
We can switch firmware depending on what network that module is attaching to.  I think it it the most use case for having multi firmware in a 
single module.


On Fri, 12/9/16, Bjørn Mork <bjorn at mork.no> wrote:

 Subject: Re: RFC: aleksander/qmi-firmware-update branch
 To: "Dan Williams" <dcbw at redhat.com>
 Cc: "libqmi (development)" <libqmi-devel at lists.freedesktop.org>, "Aleksander Morgado" <aleksander at aleksander.es>
 Date: Friday, December 9, 2016, 12:04 PM
 Dan Williams <dcbw at redhat.com>
 > On Thu, 2016-12-08 at 23:42
 +0100, Aleksander Morgado wrote:
 >> One
 interesting thing I noticed; unlike the 9200 or the 9x15
 >> I've played with, in
 the MC7455 (a 9x30) you can run the
 qmi-firmware-update program to flash multiple firmware image
 >> (modem+pri) and they are all
 kept stored in the device; i.e. you can
 >> have more than one image at the same
 time stored, and then you can
 >> --dms-list-stored-images,
 --dms-select-stored-image and
 --dms-delete-stored-image to play with them. You can also
 have for
 >> example the base firmware image and per-carrier
 >> ATT/Rogers/Bell/Generic pri images all
 stored in the device, and
 >> switch
 between them without needing to run the flashing tool. This
 >> a usecase which was already
 supported and tested with libqmi and
 >> ModemManager since a some time ago
 (but tested only with one
 Foxconn/Novatel device and without being able to upload
 >> firmware).
 > I think that's
 something the card maker can choose when they build the
 > firmware.  Some Gobi 3K devices do it,
 and Sierra MC7700/MC7750 also
 > have the
 Yes, I think
 the only new about the MC7455 generation is more flash,
 allowing them to store 4 full images.  This is
 nice, but I'm still
 looking for an
 actual use case :)
 you don't really want to have the bootloader switch
 versions when you change carrier. 
 It's just unnecessarily confusing.
 it does take significant time.
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