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#1 (**permalink**) 02-18-2008, 09:32 AM

> Date: Sat, 1 Sep 2007 23:24:08 +0400
> From: Mike Belopuhov <mkb@crypt.org.ru>
>
> D975XBX2 features SMSC LPC47M182-NW chip completely
> unsupported by OpenBSD (will try to support that shit
> when they'll release docs one day

That's probably a SuperIO chip with all sorts of legacy interfaces on
it. Most of those are already supported (com(4), pckbd(4), lpt(4)).

> ICHIIC_DEBUG flag revealed that system stops trying to init
> addr 0x4c. Excluding this address from valid scan address
> range makes the system boot fine:

Hmm, I'd like to avoid having to exclude addr 0x4c, since quite a few
machines have useful sensors at that address. Do you have any idea at
what point exactly the machine hangs? Is it on the first access of
the device at addr 0x4c, or does it fail halfway through reading
registers?

> iic0: addr 0x2e 00=a4 04=f6 05=f6 06=f6 07=f6 0a=0f 0e=21 10=7b 11=a9 12=83
> 13=a5 14=55 15=e4 16=d2 18=3f 19=08 1a=80 1f=11 20=72 21=70 22=be 23=bf 24=c5
> 25=22 26=1d 27=20 28=88 29=08 2a=ff 2b=ff 2c=ff 2d=ff 2e=59 2f=90 30=33 31=4c
> 32=4c 34=81 38=ff 39=ff 3a=ff 3b=e0 3c=c3 3e=61 3f=6c 40=05 45=ff 47=ff 49=ff
> 4b=ff 4d=ff 4e=81 4f=7f 50=81 51=7f 52=81 53=7f 54=ff 55=ff 56=ff 57=ff 58=ff
> 59=ff 5a=ff 5b=ff 5c=02 5d=22 5e=22 5f=7a 60=8a 61=80 62=e8 63=88 64=33 65=4c
> 66=4c 67=32 68=2d 69=2d 6a=3f 6b=41 6c=41 6d=24 6e=40 72=76 73=fe 74=b8 76=60
> 77=70 78=0a 79=6e 7a=40 7b=70 7c=23 7d=97 7e=fa 7f=98 80=c3 81=96 82=25 83=97
> 84=24 85=97 86=24 87=97 88=f9 89=98 8a=f2 8b=98 8c=fd 8d=98 8e=cc 8f=96 90=ca
> 91=96 92=bd 93=96 94=81 95=22 96=7f 97=22 98=7d 99=22 9a=ea 9b=1d 9c=e8 9d=1d
> 9e=e6 9f=1d a0=d4 a1=20 a2=d2 a3=20 a4=d0 a5=20 a6=a5 a7=ef a8=9f a9=a7 aa=af
> ab=a4 ac=a8 ad=bf ae=ab af=a5 b0=bf b1=ba b2=a2 b3=6f b4=c3 b5=9e b6=4f b7=ca
> b8=5a b9=c0 ba=75 bb=59 bc=f0 bd=79 be=43 bf=80 c0=8b c1=2c c2=d0 c3=a3 c4=1d
> c5=a0 c6=b6 c7=02 c8=30 c9=c9 ca=c3 cb=a0 cc=73 cd=b5 ce=90 cf=84 d0=af d1=20
> d2=93 d3=af d4=c0 d5=9a d6=b5 d7=f0 d8=b8 d9=b3 da=20 db=c7 dc=0d dd=71 de=70
> df=06 e0=61 e1=88 e2=06 e3=21 e4=95 e5=0b e6=21 e7=a0 e8=19 e9=d1 ea=b7 eb=1c
> ec=71 ed=c9 ee=24 ef=22 f0=e8 f1=1d f2=d4 f3=20 f4=eb f5=d0 f6=85 f7=e3 f8=80
> f9=a3 fa=e4 fb=e0 fc=b4 fd=e2 fe=90 ff=ce

This is an Andilog aSC7621, and a data sheet is available from the
Andilog website:

http://www.andigilog.com/downloads/aSC7621_70A06010.pdf

If you ever wanted to write a driver, this is your chance; these
sensor drivers are not very difficult

.

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Re: [Patch] System lockup on D975XBX2