Aleksander Morgado <aleksan...@lanedo.com> writes:
> 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
Bjørn
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