[ntp:questions] symmetricom / BC635 openBSD (or freeBSD) driver

Rob Neal hundoj at comcast.net
Tue Mar 11 02:17:17 UTC 2008

The driver was written for FreeBSD, not OpenBSD.

It's under a BSD license, feel free to port it.


On Mon, 10 Mar 2008, Andrew Gallo wrote:

> Thanks for the quick reply.
> Symmetricom actually has the freeBSD source code, which I am trying to
> compile without success.  As far as writing a driver, that's a bit beyond my
> skill level :)
> Thanks.
> On Mon, Mar 10, 2008 at 11:51 AM, Andy Helten <andy.helten at dot21rts.com>
> wrote:
>> agallo wrote:
>>> I have a bc635 gps card that I would like to use to donate NTP
>>> services to pool.ntp.org.
>>> I have downloaded the freeBSD driver and attempted to compile with the
>>> driver with the following results:
>>> btfp.h:424:5: warning: "OPSYS" is not defined
>>> btfp.h:424:12: warning: "FreeBSD" is not defined
>>> btfp.c: In function 'btfp_attach':
>>> btfp.c:203: warning: passing argument 4 of 'bus_setup_intr' from
>>> incompatible pointer type
>>> btfp.c:203: warning: passing argument 5 of 'bus_setup_intr' from
>>> incompatible pointer type
>>> btfp.c:203: error: too few arguments to function 'bus_setup_intr'
>>> *** Error code 1
>>> Ideally, I would like this running on an openBSD machine.  If someone
>>> has the compiled drivers for either OS, please let me know, and I'll
>>> try to get a stratum one / GPS machine in the pool.
>>> Thanks.
>> I am not familiar with the freeBSD driver, but we purchased the Linux
>> driver from Symmetricom, I believe for around $250.  I do not know
>> whether Symmetricom offers OpenBSD/FreeBSD driver, but you could
>> certainly ask.  That said, the "driver" really only needs to read two
>> 32bit registers to retrieve time (i.e. implement the bcReadBinTime()
>> call).  It would be very easy to write such a driver if you cannot get
>> the freeBSD driver to work.
>> Andy
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