MC7455 can't transmit TCP data

[David McCullough]

dailijin wrote the following:
> 
> Hi 
> 
> 
> David,
> Which kernel version you get the qwi_wwan driver，If you have solved this issue,could you send then driver code or patch to me? then I can directly test it for MC7455 and compare the driver.
> 
> 
> I am using kernel 3.8,is it same to you? 

We are using 4.4,  I just took the current git source from kernel.org and
copied it over the top of my source and built it.

There is also a small change needed in usbnet.c IIRC to do with the rest of
the MC7455.

Not sure how you will go with 3.8,  but the qmi_wwan.c driver has changed a
great deal over the years so depending on your circumstances it may be
possible.

Cheers,
Davidm



> At 2016-10-27 06:54:21, "David McCullough" <david.mccullough at accelerated.com> wrote:
> >
> >Hi dailijin,
> >
> >We had similar issues and just used the qmi_wwan driver from the latest
> >kernel.  Its pretty easy to retro fit to older kernels,
> >
> >Do note however that where I used to get dhcp bearers from the MC7354
> >I am now getting static bearers.
> >
> >Cheers,
> >Davidm
> >
> >Dan Williams wrote the following:
> >> On Wed, 2016-10-26 at 16:51 +0800, dailijin wrote:
> >> > 
> >> > Hi All,
> >> > 
> >> > 
> >> > I am testing MC7455 on Linux based on kernel 3.8, I have patched
> >> > usbnet and qmi_wwan driver, the MC7455 modem can get  connected.
> >> > But can't transmit TCP data. The modem information as below.
> >> > ATI
> >> > Manufacturer: Sierra Wireless, Incorporated
> >> > Model: MC7455
> >> > Revision: SWI9X30C_02.05.07.00 r5154 CARMD-EV-FRMWR2 2015/12/04
> >> > 22:23:15
> >> > MEID: A00000670DEA2A
> >> > ESN: 12807659625, 8074E069
> >> > IMEI: 359072060229115
> >> > IMEI SV:  3
> >> > FSN: LQ631307870110
> >> > +GCAP: +CGSM
> >> > OK
> >> > 
> >> > 
> >> > Is there anyone encounter this issue?
> >> 
> >> This is likely a raw-ip versus 802-3 issue, the patches for which
> >> landed way, way after 3.8.  Have you patched the qmi_wwan driver in
> >> your kernel with recent improvements, or is it a vanilla 3.8 qmi_wwan?
> >> 
> >> In short: many new QMI devices no longer support "ethernet" mode, but
> >> use raw-ip that skips the pointless ethernet framing.  There are kernel
> >> enhancements required to make that work, and they landed long after
> >> 3.8.
> >> 
> >> Dan
> >> 
> >> > 
> >> > Thanks
> >> > 
> >> > 
> >> > 
> >> > 
> >> > --
> >> > 
> >> > Best Regards,
> >> > Dai,Lijin
> >> > _______________________________________________
> >> > libqmi-devel mailing list
> >> > libqmi-devel at lists.freedesktop.org
> >> > https://lists.freedesktop.org/mailman/listinfo/libqmi-devel
> >> _______________________________________________
> >> libqmi-devel mailing list
> >> libqmi-devel at lists.freedesktop.org
> >> https://lists.freedesktop.org/mailman/listinfo/libqmi-devel
> >
> >-- 
> >David McCullough,  davidm at spottygum.com,   Ph: 0410 560 763

-- 
David McCullough,  david.mccullough at accelerated.com,   Ph: 0410 560 763