Re: NetBSD-5 ichlpcib watchdog timer seems to be broken for some revisions of the ichlpcib chip set.

["Scott Ellis" <scotte%warped.com@localhost>]

On -current amd64, I have:

ichlpcib0 at pci0 dev 31 function 0
ichlpcib0: vendor 0x8086 product 0x27b8 (rev. 0x01)
timecounter: Timecounter "ichlpcib0" frequency 3579545 Hz quality 1000
ichlpcib0: 24-bit timer
ichlpcib0: TCO (watchdog) timer configured.

This works fine (and has been since before the current/5.0 split).  I
tickle mine with userland... (okay, that sounded naughty)

     ScottE

>       Hello.  I've been running with NetBSD-4 on a number of machines with
> the ichlpcib(4) watchdog driver for a good while with good effect.  Now
> that 5.x is out, I've begun the process of upgrading those machines to the
> new stable release.  On at least two revisions of the Intel ich
> controller,
> I've found that the watchdog timer doesn't work as I expect.  The timer
> can
> be set, but the tickle function fails to keep the timer from triggering
> and
> rebooting the machine.  I've looked at the ichlpcib.c file, which moved
> between NetBSD-4 and NetBSD-5 from arch/i386/pci to arch/x86/pci.  There
> are some other changes between the two versions, but nothing looks obvious
> to me about why the older one works and the newer one doesn't.
>       Has anyone else seen this problem with the ichlpcib watchdog timer
> under NetBSD-5?  The three examples of chip sets which demonstrate this
> behavior probe as follows:
>
> ichlpcib0 at pci0 dev 31 function 0
> ichlpcib0: Intel 82801BA LPC Interface Bridge (rev. 0x12)
>
>
> ichlpcib0 at pci0 dev 31 function 0
> ichlpcib0: Intel 82801EB LPC Interface Bridge (rev. 0x02)
>
>
> ichlpcib0 at pci0 dev 31 function 0
> ichlpcib0: Intel 82801BA LPC Interface Bridge (rev. 0x04)
>
>       If anyone has any thoughts about what I might look at tofix this
> problem, I'm all ears.  I have a machine that's hanging with NetBSD-5, and
> having a working watchdog timer would be very useful.
>
> If there's a bug report on this already, I'm happy to append my data to
> it.
> Otherwise, I'm happy to submit a bug report as well.
>
> Any thoughts would be greatly appreciated.
> -Brian
>