I have an LG LTE USB modem device. Under windows the device presents itself as 7 serial ports and 1 ethernet interface. Under linux the device presents itself as 1 cdc-acm device and 1 usb ethernet device. I captured some usbmon logs of the communication with the device under a Windows VM. It appears to be using a simple mux protocol. I attached a segment of the usbmon log file that shows the communication with the AT serial port. Is there any existing driver which follows a format like this that can be modified to support this device? Thanks, Brian The serial port numbers range from 20 - 26. MUX message header: 4 byte magic number: 5a4812a5 4 byte packet sequence number 4 byte message length. 1 byte serial port number 1 byte: f0 message f189d100 454119051 C Bi:1:037:6 0 24 = 5a4812a5 03000000 07000000 21f00d0d 0a4f4b0d 0a000000 f189d100 454131775 S Bi:1:037:6 -115 16384 < f189d780 454635942 S Bo:1:037:5 -115 16 = 5a4812a5 d7000000 01000000 21f06100 f189d780 454636919 C Bo:1:037:5 0 16 > f189d100 454646054 C Bi:1:037:6 0 16 = 5a4812a5 04000000 01000000 21f06100 ee4f8a80 454649954 S Bi:1:037:6 -115 16384 < ee4f8180 454797769 S Bo:1:037:5 -115 16 = 5a4812a5 d8000000 01000000 21f07400 ee4f8180 454798916 C Bo:1:037:5 0 16 > ee4f8a80 454807915 C Bi:1:037:6 0 16 = 5a4812a5 05000000 01000000 21f07400 ee4f8a80 454810016 S Bi:1:037:6 -115 16384 < ee4f8180 455071136 S Bo:1:037:5 -115 16 = 5a4812a5 d9000000 01000000 21f00d00 ee4f8180 455071916 C Bo:1:037:5 0 16 > ee4f8a80 455079047 C Bi:1:037:6 0 24 = 5a4812a5 06000000 07000000 21f00d0d 0a4f4b0d 0a000000 f189db80 455087532 S Bi:1:037:6 -115 16384 < f189d480 455518832 S Bo:1:037:5 -115 16 = 5a4812a5 da000000 01000000 21f06100 f189d480 455519925 C Bo:1:037:5 0 16 > f189db80 455528424 C Bi:1:037:6 0 16 = 5a4812a5 07000000 01000000 21f06100 f189db80 455532607 S Bi:1:037:6 -115 16384 < f189d480 455675945 S Bo:1:037:5 -115 16 = 5a4812a5 db000000 01000000 21f07400 f189d480 455676922 C Bo:1:037:5 0 16 > f189db80 455683052 C Bi:1:037:6 0 16 = 5a4812a5 08000000 01000000 21f07400 f189db80 455685303 S Bi:1:037:6 -115 16384 < f189d480 455943690 S Bo:1:037:5 -115 16 = 5a4812a5 dc000000 01000000 21f00d00 f189d480 455943921 C Bo:1:037:5 0 16 > f189db80 455953050 C Bi:1:037:6 0 24 = 5a4812a5 09000000 07000000 21f00d0d 0a4f4b0d 0a000000 -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
