[PATCH] broadband-modem-mbim: disable CDMA capabilities until we actually support MBIM+CDMA
Ward, David - 0665 - MITLL
david.ward at ll.mit.edu
Sun Aug 30 10:33:16 PDT 2015
On 08/30/2015 02:21 AM, David Ward wrote:
> On 08/20/2015 12:43 PM, Dan Williams wrote:
>> CDMA-capable modems (like a Sierra EM7355) will fail to even enable,
>> because the internal CDMA code tries to initialize using AT commands and
>> that fails because many MBIM modems don't have an AT port. We should
>> figure out how to support minimal MBIM + CDMA using MBIM instead of
> Not only does this fix allow me to use MBIM on a Dell Wireless 5808e
> (branded Sierra Wireless EM7355)...
> I now seem to be able to use MBIM directly from a cold boot, without
> ever switching to the QMI configuration. And for that matter, the QMI
> configuration no longer seems to require the FCC Auth command; the
> modem goes directly to an online state even if ModemManager is
> disabled at startup. I have disconnected the laptop from both AC and
> battery for 10 minutes and then this still works. I'm quite confident
> this was not possible three weeks ago.
> Was this a Verizon over-the-air firmware update perhaps? Is anyone
> else with this modem noticing this too?
> # qmicli -p -d /dev/cdc-wdm0 --dms-get-revision
> [/dev/cdc-wdm0] Device revision retrieved:
> Revision: 'SWI9X15C_05.05.16.03 r22385 carmd-fwbuild1 2014/06/04
I left out one potentially relevant detail: a data plan was only
activated on this modem this past week. But prior to that (when I was
still using QMI with the FCC Auth command), the modem still connected to
the network, and my browser just redirected me to a Verizon landing page
for activating a data plan instead.
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