* Damian Menscher <menscher at uiuc.edu> [2004-01-14 02:26:44 -0600]: > I wrote in April 2003 that I have an Intel SE7505VB2 motherboard with > the Winbond W83627HF chip. My motherboard somehow manages to monitor 6 > fans, but this chip can only handle 3 fans. How it monitored 6 was a > mystery. You responded that you didn't know, but I should tell you if I > figured it out. > > In July 2003 I got an email from Kevin Schuchmann <kschuchm at us.ibm.com> > who suggested I read the Intel specification more closely, specifically > section 3.3.1. Apparently Intel is using two of the GPIOs on the > Winbond chip (GPIO13 and GPIO15 on pins 125 and 123, respectively) as > FanSlct1# and FanSlct2#. It's not clear that they're using the second > one, but the first (which is definitely being used) would be enough to > act as a toggle for which "bank" of fans to monitor. The Intel > documentation lists this as output: > Function select: CR2A<7>=1 & CR2A<3>=1 & LD7[F0h]<3>=0 > Data: LD7[F1h]<3> > The Winbond documentation indicates it is general purpose I/O port 1 bit > 3 (from the table in section 1.8 of their documentation). > > The Intel spec sheet is available online at: > ftp://download.intel.com/support/motherboards/server/se7505vb2/tps.pdf > > The Winbond spec sheet is available online at: > http://www.winbond.com/PDF/sheet/w83627hf.pdf > > If you have time, there are a few of us out there that would appreciate > it if you could add support for this configuration. I don't see an easy way to support such a configuration _in general_. The design of the chip drivers just doesn't account for such a thing. More than a handful of such boards, each with different permutations of h/w routed by different GPIOs would get quite ugly. In the _specific_ case, it shouldn't be too hard to hack in support for it as a one-off. Make three readings, throw the magic switch, and make three more. I guess we wouldn't want to maintain that in our CVS though. I.e. you'll likely have to code it yourself, sorry. Regards, -- Mark M. Hoffman mhoffman at lightlink.com
