mikaelbrostrom:

patch found here
http://www.atack.cz/omnia-ec25-patches.tgz

mikaelbrostrom:

upstream kernel module that works:
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/drivers/net/usb/qmi_wwan.c

dchard:

I confirm this problem stil exist with latest LEDE (SNAPSHOT, r4462-f33de80) and kernel 4.4.71 and modem:

Quectel
EC25
Revision: EC25EFAR02A06M4G

The usb devid is: 2c7c:0125

If I install the QMI related stuff (usb-modeswitch kmod-mii kmod-usb-net kmod-usb-wdm kmod-usb-net-qmi-wwan uqmi) the CDC interface is not popping up at all, even with the above mentioned method (echo “2c7c 0125” >/sys/bus/usb/drivers/qmi_wwan/new_id)

If I install the option driver related stuff (kmod-usb-serial-option kmod-usb-serial kmod-usb-serial-wwan), the 4 virtual ttyUSB interfaces are up, interface 2 and 3 are responding to AT commands via minicom, yet it is not possible to start a PDN connection.

cat /sys/kernel/debug/usb/devices
T: Bus=01 Lev=02 Prnt=02 Port=01 Cnt=02 Dev#= 4 Spd=480 MxCh= 0
D: Ver= 2.00 Cls=ef(misc ) Sub=02 Prot=01 MxPS=64 #Cfgs= 1
P: Vendor=2c7c ProdID=0125 Rev= 3.18
S: Manufacturer=Android
S: Product=Android
C:* #Ifs= 5 Cfg#= 1 Atr=a0 MxPwr=500mA
I:* If#= 0 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=ff Prot=ff Driver=option
E: Ad=81(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms
E: Ad=01(O) Atr=02(Bulk) MxPS= 512 Ivl=0ms
I:* If#= 1 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=00 Prot=00 Driver=option
E: Ad=83(I) Atr=03(Int.) MxPS= 10 Ivl=32ms
E: Ad=82(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms
E: Ad=02(O) Atr=02(Bulk) MxPS= 512 Ivl=0ms
I:* If#= 2 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=00 Prot=00 Driver=option
E: Ad=85(I) Atr=03(Int.) MxPS= 10 Ivl=32ms
E: Ad=84(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms
E: Ad=03(O) Atr=02(Bulk) MxPS= 512 Ivl=0ms
I:* If#= 3 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=00 Prot=00 Driver=option
E: Ad=87(I) Atr=03(Int.) MxPS= 10 Ivl=32ms
E: Ad=86(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms
E: Ad=04(O) Atr=02(Bulk) MxPS= 512 Ivl=0ms
I:* If#= 4 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=ff Prot=ff Driver=usbserial_generic
E: Ad=89(I) Atr=03(Int.) MxPS= 8 Ivl=32ms
E: Ad=88(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms
E: Ad=05(O) Atr=02(Bulk) MxPS= 512 Ivl=0ms


wildy:

Hi.

We've got a couple of ar71xx devices (GL-inet MIFI) that are shipping with the new Quectel EC25 modems. I have quickly grown tired of using them in PPP mode so I tried to backport qmi_wwan.c from upstream 4.9 into 4.4 (LEDE 17.01.2).
As of now, uqmi works but I can't seem to obtain a DHCP address on wwan0, both in Raw IP mode and 802.3 mode.

See: wildy/LEDE-source@bde7af1

I think that might be caused by some changes in usbnet code that we need to backport too?

I will try to make a more clean backport involving only the commits needed for EC25 but for now it would be nice to see if it works at all :)

pepe2k:

Hi @wildy,

These changes are needed to make it working:

net: qmi_wwan: support "raw IP" mode
qmi_wwan: add support for Quectel EC21 and EC25
usbnet: allow mini-drivers to consume L2 headers
net: qmi_wwan: should hold RTNL while changing netdev type

Then, for EC21/25, in rawIP mode, issue:
echo "Y" > /sys/class/net/wwanX/qmi/raw_ip

Cheers,
Piotr

ZupoLlask:

Hi Piotr,

I'm testing latest LEDE trunk snapshot (kernel 4.9) for ZBT WE826 with a MPCIE Quectel EC25 module.

When I install all QMI stuff (enumerated by wildy), /dev/cdc-wdm0 shows up automatically and after interface configuration this is the best I get from QMI:

With UMTS/GPRS/EV-DO protocol everything works just fine.

I've made a few more tests, after deleting that "4G_wan" interface (mapped to /dev/cdc-wdm0) so it doesn't interfere with the tests:

camel:

any news ?
is it now fully supported ?
i tested and only dev/ttyUSB2 and /dev/ttyUSB3 can be used..

USB0 and USB1 are out of order and not reacting
(tried current trunk)