umodem0, Cisco USB serial console, and quirks

[Andrey V. Elsukov]

On 02.11.2018 12:12, Hans Petter Selasky wrote:
>> # cu -l /dev/cuaU0
>> Connected
>>
>> <nothing here>
>>
> 
> Did you try "-s" option to set another baudrate?

Yes, the result is the same.

# cu -s 115200 -l /dev/cuaU0
Connected

If I understand correctly from
	https://www.bit0.com/tmp/usbmon-ciscoasa-verbose.txt

The

Leftover Capture Data: 80250000000008

and

 frame[1] WRITE 7 bytes
 0000  80 25 00 00 00 00 08 --  -- -- -- -- -- -- -- --  |.%.....

is something like configuration data, where 80 25 is 0x2580 == 9600, so
it should work with default speed. When I use 115200, I see this:

09:27:52.657367 usbus0.2 SUBM-CTRL-EP=00000000,SPD=FULL,NFR=2,SLEN=16,IVAL=0
 frame[0] WRITE 8 bytes
 0000  21 20 00 00 00 00 07 00  -- -- -- -- -- -- -- --  |! ......        |
 frame[1] WRITE 7 bytes
 0000  80 25 00 00 00 00 08 --  -- -- -- -- -- -- -- --  |.%.....         |
 flags 0x10 <PROXY_BUFFER|0>
 status 0xca1a3
<OPEN|TRANSFERRING|STARTED|CONTROL_XFR|CONTROL_HDR|BDMA_ENABLE|BDMA_SETUP|CAN_CANCEL_IMMED|DOING_CALLBACK|0>
09:27:52.657711 usbus0.2
DONE-CTRL-EP=00000000,SPD=FULL,NFR=2,SLEN=0,IVAL=0,ERR=0
 frame[0] WRITE 8 bytes
 frame[1] WRITE 7 bytes
 flags 0x10 <PROXY_BUFFER|0>
 status 0xca1a1
<OPEN|STARTED|CONTROL_XFR|CONTROL_HDR|BDMA_ENABLE|BDMA_SETUP|CAN_CANCEL_IMMED|DOING_CALLBACK|0>
09:27:52.760528 usbus0.2 SUBM-CTRL-EP=00000000,SPD=FULL,NFR=2,SLEN=16,IVAL=0
 frame[0] WRITE 8 bytes
 0000  21 20 00 00 00 00 07 00  -- -- -- -- -- -- -- --  |! ......        |
 frame[1] WRITE 7 bytes
 0000  00 C2 01 00 00 00 08 --  -- -- -- -- -- -- -- --  |.......         |
 flags 0x10 <PROXY_BUFFER|0>
 status 0xea1a3
<OPEN|TRANSFERRING|STARTED|CONTROL_XFR|CONTROL_HDR|BDMA_ENABLE|BDMA_SETUP|CURR_DMA_SET|CAN_CANCEL_IMMED|DOING_CALLBACK|0>

0x01c200 == 115200.

-- 
WBR, Andrey V. Elsukov

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