Re: [WATCHDOG] support of motherboards with ICH6]

["Pasi Kärkkäinen" <pasik@iki.fi>]

On Mon, Feb 07, 2005 at 04:59:53PM +0200, Pasi Kärkkäinen wrote:
> On Mon, Feb 07, 2005 at 02:48:49PM +0000, P@draigBrady.com wrote:
> > Pasi Kärkkäinen wrote:
> > >On Mon, Feb 07, 2005 at 10:00:03AM +0100, P.O. Gaillard wrote:
> > >
> > >>Hi,
> > >>
> > >>I am replying to myself so that people googling for similar problems can 
> > >>find the answer.
> > >>
> > >>Supermicro says that the internal driver of the southbridge (and also the 
> > >>W83627HF chip) are not useable because the necessary support hardware is 
> > >>missing. They say that the P8SCi board has a working watchdog.
> > >>
> > >>	hope this can help somebody someday,
> > >>
> > >>	P.O. Gaillard
> > >>
> > >
> > >
> > >Hi!
> > >
> > >I have P8SCi motherboard, and I just tried the watchdog with Linux 2.6.10.
> > >
> > >I loaded w83627hf_wdt driver, and the watchdog was detected:
> > >
> > >WDT driver for the Winbond(TM) W83627HF Super I/O chip initialising.
> > >w83627hf WDT: initialized. timeout=60 sec (nowayout=0)
> > 
> > Note there is no detection. It just writes to a particular IO port
> > (2E by default).
> > 
> > >But it is not working. I tried setting the timeout to 1 minute, and to
> > >8 minute in the BIOS, but the machine reboots after the delay no matter 
> > >what
> > >the delay is.. the watchdog driver is loaded before the timeout of course.
> > >
> > >For some reason, the driver is not working.
> > >
> > >I mailed supermicro support about this, and they told me one of their
> > >customers is using watchdog with Debian 2.6.10 kernel. 
> > >So it should work, but..
> > 
> > You need to ask them what watchdog they use exactly.
> > I've seen motherboards that have w83637hf chips but
> > actually wire the intel watchdog up so you need the i8xx_tco driver
> > 
> > If they are using the w83726hf chip you need to ask
> > what IO port they're using.
> > 
> 
> Hi!
> 
> http://nrg.joroinen.fi/watchdog_function_project_description_P4SGL.doc
> 
> That is the document I got from supermicro.. it has the io ports / registers
> they're using and also watchdog example in assembly.
> 
> It seems that they're using 0x2E..
> 

I asked for confirmation about the watchdog-chip from supermicro support, and
they replied: "The P8SCi is using Winbond W83627THF chip for watchdog.".

They also sent the docs of the winbond watchdog (different doc this time ;):

http://nrg.joroinen.fi/W83627THF0.90.pdf

Hopefully that helps somebody..

-- Pasi Kärkkäinen
       
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