Driver for RM520N-GL and quectel-cm app

Technical Subjects Driver
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1

Hi

We are using RM520N-GL 5G module in USB interface in kernel 4.14.206. We have added the VID and PID of the module in the qmi_wwan_q.c driver referring the “LTE&5G_Linux_USB_Driver_User_Guide_V2.0” document.

We can get the cdc-wdm0 device node and wwan0 network adapter.

[   56.590236] usb 2-1.1: new SuperSpeed USB device number 3 using xhci-hcd
[   56.612037] usb 2-1.1: LPM exit latency is zeroed, disabling LPM.
[   56.612810] usb 2-1.1: New USB device found, idVendor=2c7c, idProduct=0801
[   56.612817] usb 2-1.1: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[   56.612822] usb 2-1.1: Product: RM520N-GL
[   56.612827] usb 2-1.1: Manufacturer: Quectel
[   56.612831] usb 2-1.1: SerialNumber: d3896b12
[   56.662436] qmi_wwan_q 2-1.1:1.4: cdc-wdm0: USB WDM device
[   56.662452] qmi_wwan_q 2-1.1:1.4: Quectel EC25&EC21&EG91&EG95&EG06&EP06&EM06&EG12&EP12&EM12&EG16&EG18&BG96&AG35 work on RawIP mode
[   56.662587] qmi_wwan_q 2-1.1:1.4: rx_urb_size = 32768
[   56.663951] qmi_wwan_q 2-1.1:1.4 wwan0: register 'qmi_wwan_q' at usb-xhci-hcd.0.auto-1.1, WWAN/QMI device, 1a:1d:63:83:96:30

But, We are unable to connect to the internet using quectel-cm application and get the below error message

[01-01_00:01:43:714] Quectel_QConnectManager_Linux_V1.5
[01-01_00:01:43:719] Find /sys/bus/usb/devices/2-1.1 idVendor=0x2c7c idProduct=0x801
[01-01_00:01:43:720] Auto find qmichannel = /dev/cdc-wdm0
[01-01_00:01:43:720] Auto find usbnet_adapter = wwan0
[01-01_00:01:43:721] qmap_mode = 1, muxid = 0x81, qmap_netcard = wwan0
[01-01_00:01:43:721] Modem works in QMI mode
[01-01_00:01:43:725] qmap_mode = 1, muxid = 0x81, qmap_netcard = wwan0
[01-01_00:01:43:770] cdc_wdm_fd = 7
[01-01_00:01:44:773] QmiThreadSendQMITimeout pthread_cond_timeout_np timeout
[01-01_00:01:46:060] Get clientWDS = 14
[01-01_00:01:46:093] Get clientDMS = 1
[01-01_00:01:46:126] Get clientNAS = 3
[01-01_00:01:46:157] Get clientUIM = 2
[01-01_00:01:46:189] Get clientWDA = 1
[01-01_00:01:46:222] requestBaseBandVersion RM520NGLAAR01A08M4G
[01-01_00:01:46:253] qmap_settings.rx_urb_size = 31744
[01-01_00:01:46:382] requestGetSIMStatus SIMStatus: SIM_READY
[01-01_00:01:46:382] requestSetProfile[1] jionet///0
[01-01_00:01:46:446] requestGetProfile[1] jionet///0
[01-01_00:01:46:477] requestRegistrationState2 MCC: 405, MNC: 869, PS: Detached, DataCap: UNKNOW
[01-01_00:01:46:510] requestQueryDataCall IPv4ConnectionStatus: DISCONNECTED
[01-01_00:01:46:511] ifconfig wwan0 down
[01-01_00:01:46:531] ifconfig wwan0 0.0.0.0
^C[01-01_00:02:04:528] QmiWwanThread exit
[01-01_00:02:04:529] qmi_main exit

Some forum threads tell us the latest quectel-cm application.

Can you please confirm whether adding the VID,PID of the module in qmi_wwan_q.c driver is enough and also share us the latest driver and quectel-cm application source.

FYR:
quectel-cm version : WCDMA&LTE_QConnectManager_Linux&Android_V1.2.1
qmi_wwan_q.c version: Quectel_Linux&Android_QMI_WWAN_Driver_V1.1

Thanks.

2

I will send the lastest quectel-CM.

Does Jionet only support IPv6?

3

RE: Driver for RM520N-GL and quectel-cm app - Quectel Forums

4

Using the latest quectel-cm application we can detect signal (both LTE and 5G_SA) and PS attach but unable to generate ip and access internet.

FYI jionet only uses IPV6.

Firmware version in the 5G module:

RM520NGLAAR01A08M4G_01.200.01.200

Attaching the log below,

/ # ./quectel-CM -s jionet -6
[01-01_00:09:23:384] QConnectManager_Linux_V1.6.5
[01-01_00:09:23:391] Find /sys/bus/usb/devices/2-1.1 idVendor=0x2c7c idProduct=0x801, bus=0x002, dev=0x004
[01-01_00:09:23:393] Auto find qmichannel = /dev/cdc-wdm0
[01-01_00:09:23:393] Auto find usbnet_adapter = wwan0
[01-01_00:09:23:394] netcard driver = qmi_wwan_q, driver version = 22-Aug-2005
[01-01_00:09:23:395] qmap_mode = 1, qmap_version = 5, qmap_size = 16384, muxid = 0x81, qmap_netcard = wwan0
[01-01_00:09:23:396] Modem works in QMI mode
[01-01_00:09:23:425] cdc_wdm_fd = 7
[01-01_00:09:23:505] Get clientWDS = 14
[01-01_00:09:23:537] Get clientWDS = 15
[01-01_00:09:23:569] Get clientDMS = 1
[01-01_00:09:23:601] Get clientNAS = 2
[01-01_00:09:23:633] Get clientUIM = 2
[01-01_00:09:23:664] Get clientWDA = 1
[01-01_00:09:23:696] requestBaseBandVersion RM520NGLAAR01A08M4G
[01-01_00:09:23:729] qmap_settings.rx_urb_size = 16384
[01-01_00:09:23:729] qmap_settings.ul_data_aggregation_max_datagrams  = 11
[01-01_00:09:23:729] qmap_settings.ul_data_aggregation_max_size       = 8192
[01-01_00:09:23:729] qmap_settings.dl_minimum_padding                 = 0
[01-01_00:09:23:730] ioctl(0x89f2, qmap_settings) failed: No such file or directory, rc=-1
[01-01_00:09:23:856] requestGetSIMStatus SIMStatus: SIM_READY
[01-01_00:09:23:921] requestGetProfile[pdp:1 index:1] jionet///0/IPV4
[01-01_00:09:23:921] requestSetProfile[pdp:1 index:1] jionet///0/IPV6
[01-01_00:09:23:984] requestRegistrationState2 MCC: 405, MNC: 869, PS: Attached, DataCap: 5G_SA
[01-01_00:09:24:017] requestQueryDataCall IPv6ConnectionStatus: DISCONNECTED
[01-01_00:09:24:018] ip addr flush dev wwan0
[01-01_00:09:24:035] ip link set dev wwan0 down
[01-01_00:09:24:689] requestSetupDataCall WdsConnectionIPv6Handle: 0xf2b291a0
[01-01_00:09:24:786] ip link set dev wwan0 up
[01-01_00:09:24:807] ip -6 address flush dev wwan0
[01-01_00:09:24:823] ip -6 address add 2409:40f4:3c:50bd:c98c:11d3:6264:3441/64 dev wwan0
[01-01_00:09:24:839] ip -6 route add default dev wwan0
RTNETLINK answers: File exists

Please share your thoughts on resolving this.

Thanks.

5

It only support ipv6 and from the log of the quectel-CM, the wwan0 already got the ipv6 address.

6

But we are not able to connect to the internet.

Do we need to update the driver or firmware?

7

You can check wether you can ping the Google IPV6 DNS.

2001:4860:4860::8888
2001:4860:4860::8844

ping -6 2001:4860:4860::8888

I think it works.

8

You can try enable the clat by

AT+QCFG=“clat”,1

and test it again.