Re: AW: Problems with Sierra MC 8790 with older firmware revision

[Aleksander Morgado <aleksander lanedo com>]

> > Some additional information about this device, forgetting about the APP1
> > port issue...
> >
> > The MC8790 is really a Direct-IP capable device, but without DHCP.
>
> Interesting.  Let's try to figure out how to support that.  Maybe
> export the raw fwattr and let userspace figure it out instead?
>
> > The
> > sierra_net kernel driver filters the wwan port in the following check:
> >
> > /* test whether firmware supports DHCP */
> > if (!(status == sizeof(fwattr) &&
> >      (fwattr & SWI_GET_FW_ATTR_MASK))) {
> >     /* found incompatible firmware version */
> >     dev_err(&dev->udev->dev, "Incompatible driver and firmware"
> >             " versions\n");
> >     kfree(priv);
> >     return -ENODEV;
> > }
> >
> > If that check is removed, we get a wwan0 which can get connected with
> > AT!SCACT, but DHCP won't work on it. I could get the static IP to set
> > with AT!SCPADDR, though, but I couldn't get proper gateway or DNS
> > addresses. After using the x.x.x.1 address as default route, I could
> > actually ping the Internet...
>
> The sierra_net driver sets IFF_NOARP so you shouldn't really need any
> gateway address at all.  Just set the default route out on the correct
> dev:
>
>   ip route add default dev wwan0

AT!SCACT?2

  !SCACT: 2,0
  OK
AT!SCACT=1,2
  +CME ERROR: 0
AT!SCACT=1,2
  OK
AT!SCPADDR=2
  !SCPADDR: 2,"212.73.52.125"
  OK

$> sudo ifconfig wwan0 up
$> sudo ifconfig wwan0 212.73.52.125
$> sudo ip route add default dev wwan0
$> ping 8.8.8.8
PING 8.8.8.8 (8.8.8.8) 56(84) bytes of data.
64 bytes from 8.8.8.8: icmp_seq=1 ttl=49 time=331 ms
64 bytes from 8.8.8.8: icmp_seq=2 ttl=49 time=341 ms
...

Seems to work?

-- 
Aleksander