MC7304 connection?

[Dan Williams]

On Wed, 2014-05-21 at 13:11 +0200, Aleksander Morgado wrote:
> On Wed, May 21, 2014 at 12:00 PM, Bjørn Mork <bjorn at mork.no> wrote:
> >>>> So, what to do with these two interfaces now? Should we just ignore
> >>>> them in the kernel driver? Is there anything else I could try with? I
> >>>> may try to implement "WDA Set Data Format" and play with it...
> >>>
> >>>
> >>> The 3rd port is probably dead until we get any further clues.  But I
> >>> think we should try harder to make the 2nd port work before giving up.
> >>> Using the WDA "set format" command is certainly worth an attempt.  I
> >>> don't know the exact relationship to the CTL "set format", but do note
> >>> that the WDA command allows assymetric settings.  Which will screw up
> >>> stuff for the qmi_wwan driver.
> >>>
> >>
> >> WDA docs say that if one client uses CTL Set Data Format and another
> >> one uses WDA Set Data Format, an "Invalid Operation" error will be
> >> returned for the second one. I'll try to play with WDA Set Data Format
> >> anyway.
> >
> > Did you try CTL Set Data Format first to raw-ip and then back to 802.3?
> > That ought to reset any existing setting.
> 
> 
> Yeah, I also tried that :) and nothing new.

Since the interfaces are effectively paired, is ModemManager detecting
the #1 WDM and the #3 net ports?  Is there a way to ensure that if MM
picks WDM #1 that it also uses net #1 as the data port?  If we don't
have any kind of links in sysfs, I guess we could poke udev for USB
interface numbers or something, but that's icky.

Dan