cvs commit: src/sys/isa psm.c

[Brian Somers]

On Fri, 27 Aug 2004 21:25:16 +0000 (UTC), "Justin T. Gibbs" <gibbs at FreeBSD.org> wrote:
> gibbs       2004-08-27 21:25:16 UTC
> 
>   FreeBSD src repository
> 
>   Modified files:
>     sys/isa              psm.c 
>   Log:
>   Improve sync recovery algorithm:
>    o Remove PSM_SYNCERR_THRESHOLD1.  This value specified how many sync
>      errors were required before the mouse is re-initialised.
>      Re-initialisation is now done after (packetsize * 2) sync errors as
>      things aren't likely to improve after that.
>   
>    o Reset lastinputerror when re-initialisation occurs.  We don't want
>      to continue to drop data after re-initialisation.
>   
>    o Count the number of failed packets independently of the syncerrors
>      statistic.  syncerrors is useful for recovering sync within a single
>      packet.  pkterrors allows us to detect when the mouse changes its
>      packet mode due to some external event (e.g. KVM switch).
>   
>    o Reinitialize the mouse if we see more than psmpkterrthresh errors
>      during the validation period.  The validation period begins as soon
>      as a sync error is detected and continues until psmerrsecs/msecs
>      time has elapsed.  The defaults for these two values force a reset
>      if we see two packet errors in a 2 second period.  This allows rapid
>      detection of packet framing errors caused by the mouse changing packet
>      modes.
>   
>    o Export psmpkterrthresh as a sysctl
>   
>    o Export psmloglevel as a sysctl.
>   
>    o Enable more debugging code to be enabled at runtime via psmloglevel.
>   
>    o Simplify verbose conditioned loging by using a VLOG macro.
>   
>    o Add several comments describing the sync recovery algorithm of
>      this driver.
>   
>   Large Portions by: Brian Somers <brian at Awfulhak.org>
>   Inspired and Frustrated by: Belkin KVMs
>   Reviewed by: njl, philip
>   
>   Revision  Changes    Path
>   1.80      +120 -98   src/sys/isa/psm.c

Good stuff - thanks for all your work!

-- 
Brian <brian at Awfulhak.org>                        <brian@[uk.]FreeBSD.org>
      <http://www.Awfulhak.org>                   <brian@[uk.]OpenBSD.org>
Don't _EVER_ lose your sense of humour !