Hi Xingxing,


On 01/19/2018 10:52 AM, He, Xingxing wrote:
> Hi Christophe,
>
> May I get the patch in usb-modeswitch for switch device to PPP mode? I would like to have a try, thank you in advance.
>
> Best regards,
> Xingxing
I use usb-modeswitch 2.5.0 
(http://www.draisberghof.de/usb_modeswitch/usb-modeswitch-2.5.0.tar.bz2).
I had to patch usb-modeswitch to support huawei E3372 with firmware 
22.X. I have done that before trying MS2131 so I can't tell if it is 
necessary for this device (or device firmware).
Here is the comment I wrote when I have implemented the modification:

After some research I found this interesting message on a forum 
(http://www.draisberghof.de/usb_modeswitch/bb/viewtopic.php?f=4&t=1734):

What has been labelled "fall back" message in this thread is not a 
Huawei official switch message, it just happens to work in some firmwares.

55534243123456780000000000000011062000000101000100000000000000

is the standard switch message

while

55534243123456780000000000000011063000000100010000000000000000

is a Huawei official fall back switch msg switching any modern Huawei 
dongle into 12d1:1001.


The first binary message is the message sent by usb-modeswitch to many 
Huawei devices.
I modified usb-modeswitch to send the second binary message instead. 
Here is what happens when inserting USB key with this modification:

[ 174.120901] usb 1-1: new high-speed USB device number 2 using ci_hdrc
[ 174.273073] usb 1-1: New USB device found, idVendor=12d1, idProduct=1f01
[ 174.279807] usb 1-1: New USB device strings: Mfr=1, Product=2, 
SerialNumber=3
[ 174.287016] usb 1-1: Product: HUAWEI_MOBILE
[ 174.291237] usb 1-1: Manufacturer: HUAWEI_MOBILE
[ 174.295876] usb 1-1: SerialNumber: 0123456789ABCDEF
[ 174.340649] usb-storage 1-1:1.0: USB Mass Storage device detected
[ 174.348241] scsi host0: usb-storage 1-1:1.0
[ 175.322850] usb 1-1: USB disconnect, device number 2
[ 175.890898] usb 1-1: new high-speed USB device number 3 using ci_hdrc
[ 176.049944] usb 1-1: New USB device found, idVendor=12d1, idProduct=155e
[ 176.056720] usb 1-1: New USB device strings: Mfr=1, Product=2, 
SerialNumber=0
[ 176.063911] usb 1-1: Product: HUAWEI_MOBILE
[ 176.068104] usb 1-1: Manufacturer: HUAWEI_MOBILE
[ 176.119262] option 1-1:1.0: GSM modem (1-port) converter detected
[ 176.140098] usb 1-1: GSM modem (1-port) converter now attached to ttyUSB0
[ 176.163530] option 1-1:1.1: GSM modem (1-port) converter detected
[ 176.188362] usb 1-1: GSM modem (1-port) converter now attached to ttyUSB1
[ 176.221032] option 1-1:1.2: GSM modem (1-port) converter detected
[ 176.250351] usb 1-1: GSM modem (1-port) converter now attached to ttyUSB2
[ 176.322577] cdc_ncm 1-1:1.3: MAC-Address: 00:1e:10:1f:00:00
[ 176.328169] cdc_ncm 1-1:1.3: setting rx_max = 16384
[ 176.354358] cdc_ncm 1-1:1.3 wwan0: register 'cdc_ncm' at 
usb-ci_hdrc.0-1, Mobile Broadband Network Device, 00:1e:10:1f:00:00
A USB device 12d1:155e appears, creates 3 USB serial channels and a 
cdc_ncm interface.


End of comment

When I insert an MS2131, here is what I see on my system:
[  178.452861] usb 1-1: new high-speed USB device number 2 using ci_hdrc
[  178.604840] usb 1-1: New USB device found, idVendor=12d1, idProduct=14fe
[  178.611574] usb 1-1: New USB device strings: Mfr=1, Product=2, 
SerialNumber=3
[  178.618782] usb 1-1: Product: HUAWEI Mobile
[  178.622991] usb 1-1: Manufacturer: HUAWEI
[  178.627009] usb 1-1: SerialNumber: FFFFFFFFFFFFFFFF
[  178.652141] usb-storage 1-1:1.0: USB Mass Storage device detected
[  178.659862] scsi host0: usb-storage 1-1:1.0
[  179.648202] usb 1-1: USB disconnect, device number 2
[  179.952752] usb 1-1: new high-speed USB device number 3 using ci_hdrc
[  180.104463] usb 1-1: New USB device found, idVendor=12d1, idProduct=155e
[  180.111194] usb 1-1: New USB device strings: Mfr=1, Product=2, 
SerialNumber=0
[  180.118390] usb 1-1: Product: HUAWEI Mobile
[  180.122581] usb 1-1: Manufacturer: HUAWEI
[  180.184692] option 1-1:1.0: GSM modem (1-port) converter detected
[  180.205743] usb 1-1: GSM modem (1-port) converter now attached to ttyUSB0
[  180.225687] option 1-1:1.1: GSM modem (1-port) converter detected
[  180.251829] usb 1-1: GSM modem (1-port) converter now attached to ttyUSB1
[  180.275843] option 1-1:1.2: GSM modem (1-port) converter detected
[  180.307996] usb 1-1: GSM modem (1-port) converter now attached to ttyUSB2
[  180.351223] cdc_ncm 1-1:1.3: MAC-Address: 00:1e:10:1f:00:00
[  180.388163] cdc_ncm 1-1:1.3 wwan0: register 'cdc_ncm' at 
usb-ci_hdrc.0-1, Mobile Broadband Network Device, 00:1e:10:1f:00:00

and a lsusb after that:
root(a)klk-wifc-030122:~ # lsusb
Bus 001 Device 003: ID 12d1:155e

My usbmodeswitch patch is attached to this mail.

Hoping this helps,

Christophe