Synaptics Touchpad driver

[Loren M. Lang]

On Sun, Mar 13, 2005 at 10:48:46AM -0800, Mikko Ty?l?j?rvi wrote:
> 
> Hi,
> 
> On Sat, 12 Mar 2005, Loren M. Lang wrote:
> 
> >It seems that FreeBSD 5.3 now has support in the kernel for the
> >synaptics touchpad that my laptop has.  Right now it's just running as a
> >normal mouse, it looks like the support is disabled by default.  In
> >isa/psm.c, I can see the synaptics support in there, but it's disabled
> >unless hw.psm.synaptics_support is set to 1.  My question is how do I
> >set it to one?  It's setup as a TUNABLE_INT, but there is no sysctl for
> >it.  Does it only appear on boot?
> 
> It is not a sysctl, it is a kernel tunable.  You control it from the
> boot loader, for example by putting
> 
>   hw.psm.synaptics_support="1"
> 
> into /boot/loader.conf.  See loader.conf(5) and /boot/defaults/loader.conf
> for more information.

That's what I was wondering and I tried to set it in the loader, but I
haven't noticed a difference.  No added sysctls to tune the touchpad, no
kernel messages showing anything obvious, the touchpad still acts the
same, etc.  Also, I looked through the kernel sources for other
TUNABLE_INT's:

...
/usr/src/sys/cam/scsi/scsi_all.c:       TUNABLE_INT_FETCH("kern.cam.scsi_delay", &delay);
/usr/src/sys/cam/scsi/scsi_cd.c:TUNABLE_INT("kern.cam.cd.changer.min_busy_seconds", &changer_min_busy_seconds);
/usr/src/sys/cam/scsi/scsi_cd.c:TUNABLE_INT("kern.cam.cd.changer.max_busy_seconds", &changer_max_busy_seconds);
/usr/src/sys/cam/scsi/scsi_cd.c:        TUNABLE_INT_FETCH(tmpstr, &softc->minimum_command_size);
/usr/src/sys/cam/scsi/scsi_da.c:TUNABLE_INT("kern.cam.da.retry_count", &da_retry_count);
/usr/src/sys/cam/scsi/scsi_da.c:TUNABLE_INT("kern.cam.da.default_timeout", &da_default_timeout);
/usr/src/sys/cam/scsi/scsi_da.c:        TUNABLE_INT_FETCH(tmpstr, &softc->minimum_cmd_size);
...

sysctls -a|grep cam:
kern.cam.scsi_delay: 15000
kern.cam.cd.changer.min_busy_seconds: 5
kern.cam.cd.changer.max_busy_seconds: 15
kern.cam.da.retry_count: 4
kern.cam.da.default_timeout: 60

It looks like all these tunables are also sysctls.

> 
>      $.02,
>      /Mikko

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