umodem0, Cisco USB serial console, and quirks

[Andrey V. Elsukov]

On 02.11.2018 16:59, Warner Losh wrote:
>     All the commands for USB modems should be described here:
> 
>     https://www.usb.org/sites/default/files/CDC_EEM10.pdf
> 
>     I'm sorry, but I don't have time currently to decode the Linux traces
>     and compare with FreeBSD.
> 
> 
> One thing to also note about the Linux driver. "it just works" is only
> because people have inserted a crap-ton of special cases and dealt with
> weird quirks of different devices, and devices that are only kinda sorta
> standards conforming, but easy enough to hack the driver to make work.
> Chances are quite good you'll have to, as hps points out, puzzle through
> the traces to find where it's non-conformant and/or our driver is
> non-compliant.

So, when it "just work" under Linux, Windows and Mac OS, but doesn't
work under FreeBSD, I suspect we need fix FreeBSD :)

-- 
WBR, Andrey V. Elsukov

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