[OpenWrt-Devel] [PATCH] comgt: add ncm proto support

[Matti Laakso]

Hi Sami,

> Using John's version:
>
> config interface 'wan'
>          option proto 'wwan'
>          option apn 'opengate'
> #       option device '/dev/cdc-wdm0' (with or without commenting this)
>
> Does absolutely nothing, nothing in logread...
>
> However now when using
>
> config interface 'wan'
>          option proto 'ncm'
>          option apn 'opengate'
>          option device '/dev/ttyUSB1'

I believe that device should be /dev/cdc-wdm0 also here, at least when 
using huawei_cdc_ncm. The /dev/ttyUSBx terminals created by the option 
driver do not necessarily support all necessary AT-commands. Also, (at 
least when using proto ncm) you need to specify in addition

option ifname wwan0

Missing this could lead to the errors below.

Matti

>
> I see the Huawei dongle actually connects, as in the light lits up and
> stays, indicating connection is made, but no wwan0 nor any other
> interface at openwrt, also some erros still on logread:
>
> Wed Oct 29 18:50:34 2014 kern.info kernel: [ 1174.740000] usb 1-1.3:
> new high-speed USB device number 5 using ehci-platform
> Wed Oct 29 18:50:35 2014 kern.info kernel: [ 1175.450000] usb 1-1.3:
> USB disconnect, device number 5
> Wed Oct 29 18:50:35 2014 kern.info kernel: [ 1175.780000] usb 1-1.3:
> new high-speed USB device number 6 using ehci-platform
> Wed Oct 29 18:50:35 2014 kern.info kernel: [ 1175.910000] option
> 1-1.3:1.0: GSM modem (1-port) converter detected
> Wed Oct 29 18:50:35 2014 kern.info kernel: [ 1175.920000] usb 1-1.3:
> GSM modem (1-port) converter now attached to ttyUSB0
> Wed Oct 29 18:50:35 2014 kern.info kernel: [ 1175.930000] option
> 1-1.3:1.1: GSM modem (1-port) converter detected
> Wed Oct 29 18:50:35 2014 kern.info kernel: [ 1175.960000] usb 1-1.3:
> GSM modem (1-port) converter now attached to ttyUSB1
> Wed Oct 29 18:50:35 2014 kern.info kernel: [ 1175.970000]
> huawei_cdc_ncm 1-1.3:1.2: MAC-Address: 0c:5b:8f:27:9a:64
> Wed Oct 29 18:50:35 2014 kern.info kernel: [ 1175.980000]
> huawei_cdc_ncm 1-1.3:1.2: cdc-wdm0: USB WDM device
> Wed Oct 29 18:50:35 2014 kern.info kernel: [ 1175.990000]
> huawei_cdc_ncm 1-1.3:1.2 wwan0: register 'huawei_cdc_ncm' at
> usb-ehci-platform-1.3, Huawei CDC NCM device, 0c:5b:8f:27:9a:64
>
> (ifup wan here)
>
> Wed Oct 29 18:51:00 2014 daemon.notice netifd: Interface 'wan' is setting up now
>
> (somewhere close time to the next line the dongles light lits up steady)
>
> Wed Oct 29 18:51:08 2014 daemon.notice netifd: wan (5097): ncm[5097]
> Connected, starting DHCP
> Wed Oct 29 18:51:08 2014 daemon.notice netifd: wan (5097): Command
> failed: Invalid argument
> Wed Oct 29 18:51:08 2014 daemon.notice netifd: wan (5097): Command
> failed: Unknown error
> Wed Oct 29 18:51:08 2014 daemon.notice netifd: wan (5097): Command
> failed: Unknown error
>
> No interface appears on openwrt...
>
> Also after this, "ifdown wan" doesn't tear the connection down (light
> stays up). So somethign works to the point dongle itself get's
> connected, but clearly something doesn't work still... This is on
> ar71xx platform with 3.14 kernel...
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