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LTE

to test the EM7455 Card (+ NGFF Key-B Adapter) on the BPI-R3 (mPCIe Slot)

https://www.bipom.com/documents/sierra/4117727%20AirPrime%20EM-MC74xx%20AT%20Command%20Reference%20r4.pdf

Kernel-Options:

CONFIG_USB_USBNET=m
CONFIG_USB_SERIAL_OPTION=m
CONFIG_USB_SERIAL_QUALCOMM=m
CONFIG_USB_NET_CDC_MBIM=m
CONFIG_USB_NET_QMI_WWAN=m

Needed tools:

root@bpi-r3:~# apt install libqmi-utils libmbim-utils

i'm using a Congstar-SIM

APN-settings: https://forum.congstar.de/thread/46325-mobil-surfen-mit-congstar-manuelle-einstellungen-zum-mobilen-internet-apn/

QMI-Mode

Step-by-step guide with qmicli:

https://techship.com/faq/how-to-step-by-step-set-up-a-data-connection-over-qmi-interface-using-qmicli-and-in-kernel-driver-qmi-wwan-in-linux/

root@bpi-r3:~# qmicli --device=/dev/cdc-wdm0 --get-expected-data-format
802-3
root@bpi-r3:~# qmicli --device=/dev/cdc-wdm0 --wda-get-data-format
[/dev/cdc-wdm0] Successfully got data format
                   QoS flow header: no
               Link layer protocol: 'raw-ip'
  Uplink data aggregation protocol: 'disabled'
Downlink data aggregation protocol: 'disabled'
                     NDP signature: '0'
Downlink data aggregation max datagrams: '0'
Downlink data aggregation max size: '0'
root@bpi-r3:~# ip link set dev wwan0 down
root@bpi-r3:~# echo Y > /sys/class/net/wwan0/qmi/raw_ip
root@bpi-r3:~# ip link set dev wwan0 up





root@bpi-r3:~# qmicli --device=/dev/cdc-wdm0 -p --uim-verify-pin=PIN1,1234
[/dev/cdc-wdm0] PIN verified successfully

root@bpi-r3:~# qmicli --device=/dev/cdc-wdm0 -p --uim-get-card-status
[/dev/cdc-wdm0] Successfully got card status
Provisioning applications:
        Primary GW:   slot '1', application '1'
        Primary 1X:   session doesn't exist
        Secondary GW: session doesn't exist
        Secondary 1X: session doesn't exist
Slot [1]:
        Card state: 'present'
        UPIN state: 'not-initialized'
                UPIN retries: '0'
                UPUK retries: '0'
        Application [1]:
                Application type:  'usim (2)'
                Application state: 'ready'
                Application ID:
                        A0:00:00:00:87:10:02:FF:49:94:20:89:03:10:00:00
                Personalization state: 'ready'
                UPIN replaces PIN1: 'no'
                PIN1 state: 'enabled-verified'
                        PIN1 retries: '3'
                        PUK1 retries: '10'
                PIN2 state: 'enabled-not-verified'
                        PIN2 retries: '3'
                        PUK2 retries: '10'
root@bpi-r3:~# 

qmicli -p -v -d /dev/cdc-wdm0 --wds-stop-network=disable-autoconnect --client-cid=37
qmicli -v -p --device=/dev/cdc-wdm0 --wds-set-ip-family=6
qmicli -d /dev/cdc-wdm0 --wds-get-profile-list=3gpp
qmicli -d /dev/cdc-wdm0 --wds-get-channel-rates
qmicli -d /dev/cdc-wdm0 --dms-set-fcc-authentication
qmicli -d /dev/cdc-wdm0 --dms-get-operating-mode

MBIM-Mode

https://gist.github.com/Juul/e42c5b6ec71ce11923526b36d3f1cb2c#connecting-using-mbim

first Test

root@bpi-r3:~# modprobe cdc_mbim

/etc/mbim-network.conf:
APN=internet.v6.telekom
PROXY=yes

root@bpi-r3:~# mbimcli --device=/dev/cdc-wdm0  --query-device-caps
[/dev/cdc-wdm0] Device capabilities retrieved:
              Device type: 'remote'
           Cellular class: 'gsm'
              Voice class: 'no-voice'
                SIM class: 'removable'
               Data class: 'umts, hsdpa, hsupa, lte'
                 SMS caps: 'pdu-receive, pdu-send'
                Ctrl caps: 'reg-manual'
             Max sessions: '8'
        Custom data class: 'unknown'
                Device ID: '352733105743066'
            Firmware info: 'SWI9X30C_02.24.03.00'
            Hardware info: 'EM7455'
root@bpi-r3:~# mbim-network /dev/cdc-wdm0 start
Loading profile at /etc/mbim-network.conf...
    APN: internet.v6.telekom
    APN auth protocol: unset
    APN user: unset
    APN password: unset
    mbim-proxy: yes
Querying subscriber ready status 'mbimcli -d /dev/cdc-wdm0 --query-subscriber-ready-status --no-close --device-open-proxy'...
[/dev/cdc-wdm0] Subscriber ready status retrieved: Ready state: 'device-locked'
Subscriber ID: 'unknown' SIM ICCID: '89490200001355851497' Ready info: 'none' Telephone numbers: (0) 'unknown' [/dev/cdc-wdm0] Session not closed: TRID: '4'
Saving state at /tmp/mbim-network-state-cdc-wdm0... (TRID: 4)
Querying registration state 'mbimcli -d /dev/cdc-wdm0 --query-registration-state --no-open=4 --no-close --device-open-proxy'...
[/dev/cdc-wdm0] Registration status: Network error: 'unknown' Register state: 'deregistered' Register mode: 'automatic' Available data classes: 'unknown' Curren
t cellular class: 'gsm' Provider ID: 'unknown' Provider name: 'unknown' Roaming text: 'unknown' Registration flags: 'packet-service-automatic-attach' [/dev/cdc-wdm0] Session not closed: TRID: '6'                                             
Saving state at /tmp/mbim-network-state-cdc-wdm0... (TRID: 6)
Attaching to packet service with 'mbimcli -d /dev/cdc-wdm0 --attach-packet-service --no-open=6 --no-close --device-open-proxy'...
error: operation failed: PinRequired
Saving state at /tmp/mbim-network-state-cdc-wdm0... (TRID: 8)
Starting network with 'mbimcli -d /dev/cdc-wdm0 --connect=apn='internet.v6.telekom' --no-open=8 --no-close --device-open-proxy'...                              
error: operation failed: PinRequired
Network start failed
[/dev/cdc-wdm0] Session not closed: TRID: '10'
Saving state at /tmp/mbim-network-state-cdc-wdm0... (TRID: 10)
root@bpi-r3:~#

so it looks like pin-problem and i tried this:

root@bpi-r3:~# mbimcli --device=/dev/cdc-wdm0 -p --enter-pin=1234
[/dev/cdc-wdm0] PIN operation successful
                                                                                
[/dev/cdc-wdm0] PIN info:
                 PIN state: 'locked'
                  PIN type: 'pin2'
        Remaining attempts: '3'
root@bpi-r3:~# mbim-network /dev/cdc-wdm0 start
Loading profile at /etc/mbim-network.conf...
    APN: internet.v6.telekom
    APN auth protocol: unset
    APN user: unset
    APN password: unset
    mbim-proxy: yes
Loading previous state from /tmp/mbim-network-state-cdc-wdm0...
    Previous Transaction ID: 10
error: no actions specified
Clearing state at /tmp/mbim-network-state-cdc-wdm0...
Querying subscriber ready status 'mbimcli -d /dev/cdc-wdm0 --query-subscriber-ready-status --no-close --device-open-proxy'...
[/dev/cdc-wdm0] Subscriber ready status retrieved: Ready state: 'initialized' Subscriber ID: '26201704168zzzz' SIM ICCID: '8949020000135585yyyy' Ready info: 'none' Telephone numbers: (1) '+491512025xxxx' [/dev/cdc-wdm0] Session not closed: 
TRID: '4'
Saving state at /tmp/mbim-network-state-cdc-wdm0... (TRID: 4)
Querying registration state 'mbimcli -d /dev/cdc-wdm0 --query-registration-state
 --no-open=4 --no-close --device-open-proxy'...
[/dev/cdc-wdm0] Registration status: Network error: 'unknown' Register state: 'deregistered' Register mode: 'automatic' Available data classes: 'unknown' Current cellular class: 'gsm' Provider ID: 'unknown' Provider name: 'unknown' Roaming
text: 'unknown' Registration flags: 'packet-service-automatic-attach' [/dev/cdc-wdm0] Session not closed: TRID: '6'
Saving state at /tmp/mbim-network-state-cdc-wdm0... (TRID: 6)
Attaching to packet service with 'mbimcli -d /dev/cdc-wdm0 --attach-packet-service --no-open=6 --no-close --device-open-proxy'...
error: operation failed: RadioPowerOff
Saving state at /tmp/mbim-network-state-cdc-wdm0... (TRID: 8)
Starting network with 'mbimcli -d /dev/cdc-wdm0 --connect=apn='internet.v6.telekom' --no-open=8 --no-close --device-open-proxy'...
error: operation failed: RadioPowerOff
Network start failed
[/dev/cdc-wdm0] Session not closed: TRID: '10'
Saving state at /tmp/mbim-network-state-cdc-wdm0... (TRID: 10)
root@bpi-r3:~#

change Mode

Caution this may break functionality!

Make sure all known modules are loaded:

root@bpi-r3:~# modprobe qmi_wwan
root@bpi-r3:~# modprobe qcserial
root@bpi-r3:~# modprobe cdc_mbim

Get and switch mode (device open param should match your current Mode):

root@bpi-r3:~# qmicli -d /dev/cdc-wdm0 --device-open-mbim --dms-swi-get-usb-composition
[/dev/cdc-wdm0] Successfully retrieved USB compositions:
            USB composition 6: DM, NMEA, AT, QMI
        [*] USB composition 8: DM, NMEA, AT, MBIM
            USB composition 9: MBIM

root@bpi-r3:~# qmicli -d /dev/cdc-wdm0 --device-open-qmi --dms-swi-get-usb-composition
[/dev/cdc-wdm0] Successfully retrieved USB compositions:
        [*] USB composition 6: DM, NMEA, AT, QMI
            USB composition 8: DM, NMEA, AT, MBIM
            USB composition 9: MBIM

root@bpi-r3:~# qmicli -d /dev/cdc-wdm0 --device-open-mbim --dms-swi-set-usb-composition 6
root@bpi-r3:~# qmicli -d /dev/cdc-wdm0 --device-open-qmi --dms-swi-set-usb-composition 8

After that you will be prompted to set device offline and do reset.

qmicli ... --dms-set-operating-mode=offline
qmicli ... --dms-set-operating-mode=reset

troubleshooting

In my case no device is recognized by driver (no serial ttyUSBx too). Fixed this by adding usb-id in qcserial and qmi_wwan driver.

But before i tried these steps:

i saw in dmesg only this (also after cold-reset):

[    3.592655] usb 1-1.1: new high-speed USB device number 4 using xhci-mtk
[    3.823392] usb 1-1.1: config 1 has an invalid interface number: 8 but max is 3
[    3.830719] usb 1-1.1: config 1 has no interface number 1

with this i have got access to the AT-Interface:

lsusb:

Bus 001 Device 004: ID 413c:81c2 Dell Computer Corp. DW5811e Snapdragon™ X7 LTE

unlock ttyUSBx with option-module:

root@bpi-r3:~# modprobe option
[  229.747728] usbcore: registered new interface driver option
[  229.753429] usbserial: USB Serial support registered for GSM modem (1-port)

root@bpi-r3:~# echo 413c 81c2 >/sys/bus/usb-serial/drivers/option1/new_id
[  300.293186] option 1-1.1:1.0: GSM modem (1-port) converter detected
[  300.299755] usb 1-1.1: GSM modem (1-port) converter now attached to ttyUSB0
[  300.307011] option 1-1.1:1.2: GSM modem (1-port) converter detected
[  300.313657] usb 1-1.1: GSM modem (1-port) converter now attached to ttyUSB1
[  300.320968] option 1-1.1:1.3: GSM modem (1-port) converter detected
[  300.327741] usb 1-1.1: GSM modem (1-port) converter now attached to ttyUSB2
[  300.336533] option 1-1.1:1.8: GSM modem (1-port) converter detected
[  300.343262] usb 1-1.1: GSM modem (1-port) converter now attached to ttyUSB3

now only with “minicom -D /dev/ttyUSB2”. (commandmode with Ctrl+AA, because already via Minicom on the R3)

ATE1

OK

AT!ENTERCND="A710"

OK

AT!CUSTOM?

!CUSTOM:

             GPSENABLE          0x04

             GPSSEL             0x01

             IPV6ENABLE         0x01

             SIMLPM             0x01

             USBSERIALENABLE    0x01

             SINGLEAPNSWITCH    0x01


OK

AT!USBCOMP?

Config Index: 1

Config Type:  1 (Generic)

Interface bitmask: 0020010D (diag,nmea,modem,rmnet0,ubist) 


OK

AT!USBCOMP=?

!USBCOMP: 

AT!USBCOMP=<Config Index>,<Config Type>,<Interface bitmask>

  <Config Index>      - configuration index to which the composition applies, s


  <Config Type>       - 1:Generic, 2:USBIF-MBIM, 3:RNDIS

                        config type 2/3 should only be used for specific Sierra

                        customized VID/PID should use config type 1


  <Interface bitmask> - DIAG     - 0x00000001,

                        NMEA     - 0x00000004,

                        MODEM    - 0x00000008,

                        RMNET0   - 0x00000100,

                        RMNET1   - 0x00000400,

                        MBIM     - 0x00001000,

  e.g.

  10D  - diag, nmea, modem, rmnet interfaces enabled

  1009 - diag, modem, mbim interfaces enabled


  The default configuration is:

  at!usbcomp=1,1,10F


OK

can't set default-mode, but the following fixes it and go back to mbim-mode after a cold-boot (ttyUSB accessible via options-module too)

AT!USBCOMP=1,1,100D
OK
AT!RESET
OK

FW-WEB Wiki

Table of Contents

LTE

QMI-Mode

MBIM-Mode

first Test

change Mode

troubleshooting