Driver Request For EM120

Technical Subjects Driver
21

i guess cuz missing MHI driver or USB driver, btw should GLAP(PCIe only) version never have ttyUSBx devices?

22

You at least do have an AT interface. What’s your OS/Kernel setup?
I’m testing on OpenWRT/Snapshot with just a minor patch in the MHI driver.

openwrt-kernel-config.conf.txt (5.1 KB)

As I understand it the GLAP module would still need an AT interface for diagnostics/firmware upgrade e.t.c.

23

Hopefully someone at Quectel can chip in.
Perhaps there may be a way to run AT commands over QMI. None found so far.

24

Have you still not found a solution to this? I have the same problem.

25

Not been here in a while.

With Linux 6.6 and the attached patch there’s an AT interface (OpenWRT 24.10).
The patch was after hunting for similar issues with MHI driver modems.

  System   |                  device: /sys/devices/platform/soc/11280000.pcie/pci0003:00/0003:00:00.0/0003:01:00.0
           |                 physdev: /sys/devices/platform/soc/11280000.pcie/pci0003:00/0003:00:00.0/0003:01:00.0
           |                 drivers: mhi-pci-generic
           |                  plugin: quectel
           |            primary port: wwan2mbim0
           |                   ports: wwan2 (net), wwan2at0 (at), wwan2mbim0 (mbim),
           |                          wwan2qcdm0 (ignored)

~ mmcli -L
    /org/freedesktop/ModemManager1/Modem/2 [quectel] EM120R_GL
~ mmcli -m 2 --command="AT"
response: ''
~ mmcli -m 2 --command="ATI"
response: 'Quectel
EM120R-GL
Revision: EM120RGLAPR02A09M4G'
~ socat - /dev/wwan2at0,crnl
ATI

Quectel
EM120R-GL
Revision: EM120RGLAPR02A09M4G

OK

999-mhi-async.patch (1.8 KB)

26

Thank you for answering.
I’ve changed my laptop so I don’t need to solve the issue anymore.
Btw I just came over this Lenovo list of links for enabling wwan on Linux:

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