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From
SubjectRe: [patch] DTR/DSR hardware handshake support for 2.0/2.2/2.4
Date
Followup to:  <20000802125634.A260@localhost>
By author: David Lawyer <dave@lafn.org>
In newsgroup: linux.dev.kernel
> > #define RTSXOFF 0000001 /* Enable RTS hwfc on input */
> > #define CTSXON 0000002 /* Enable CTS hwfc on output */
> > #define DTRXOFF 0000004 /* Enable DTR hwfc on input */
> > #define CDXON 0000010 /* Enable CD hwfc on output */
> > #define ISXOFF 0000020 /* Enable RTS hwfc on input */
>
> Where is "DSR hwfc on output"? This is a serious omission since I
> think it's more important than CD hwfc.
>

Not only that, but RTSXOFF and ISXOFF are documented as the same
thing.

I have to admit I rather like the idea of controlling the output bits
and input bits used for flow control separately and explicitly; it
even allows the user to implement "hybrid" control when it's not known
a priority how the target device is to be controlled.

-hpa
--
<hpa@transmeta.com> at work, <hpa@zytor.com> in private!
"Unix gives you enough rope to shoot yourself in the foot."
http://www.zytor.com/~hpa/puzzle.txt

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