freebsd stable - Aug 2003 - support of SMBus on ICH3

Hello all,

I have problems with enabling support for SMBus on STABLE.
My motherboard is ICH3 (82801CA).

As suggested in LINT I added 3 lines to my kernel config:

device		smbus
device		ichsmb                                                         
device		smb

But after compiling, installing and rebooting /dev/smb[01] are
not available and no changes in kernel startup messages either.
So I assume something hasn't been detected. I will provide any
additional info if needed.

Any suggestion or thoughts?



# dmesg:
Copyright (c) 1992-2003 The FreeBSD Project.
Copyright (c) 1979, 1980, 1983, 1986, 1988, 1989, 1991, 1992, 1993, 1994
	The Regents of the University of California. All rights reserved.
FreeBSD 4.8-STABLE #0: Sun Aug 10 20:08:36 CEST 2003
    root@exmatis1.xxx.xxx:/usr/src/sys/compile/KERNEL
Timecounter "i8254"  frequency 1193182 Hz
CPU: Intel(R) Pentium(R) 4 CPU 2.00GHz (2000.08-MHz 686-class CPU)
  Origin = "GenuineIntel"  Id = 0xf24  Stepping = 4
 
Features=0x3febf9ff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CLFLUSH,DTS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM>
real memory  = 268406784 (262116K bytes)
avail memory = 255754240 (249760K bytes)
Preloaded elf kernel "kernel" at 0xc03c7000.
Preloaded elf module "linux.ko" at 0xc03c709c.
Pentium Pro MTRR support enabled
md0: Malloc disk
Using $PIR table, 6 entries at 0xc00f13b0
apm0: <APM BIOS> on motherboard
apm0: found APM BIOS v1.2, connected at v1.2
npx0: <math processor> on motherboard
npx0: INT 16 interface
pcib0: <Intel 82845 Host to PCI bridge> on motherboard
pci0: <PCI bus> on pcib0
agp0: <Intel 82845 host to AGP bridge> mem 0xe0000000-0xefffffff at device
0.0 on pci0
pcib1: <Intel 82845 PCI-PCI (AGP) bridge> at device 1.0 on pci0
pci1: <PCI bus> on pcib1
drm0: <ATI Radeon LW Mobility 7500 M7> port 0xd800-0xd8ff mem
0xd7000000-0xd700ffff,0xd8000000-0xdfffffff irq 5 at device 0.0 on pci1
info: [drm] AGP at 0xe0000000 256MB
info: [drm] Initialized radeon 1.8.0 20020828 on minor 0
uhci0: <Intel 82801CA/CAM (ICH3) USB controller USB-A> port 0xb800-0xb81f
irq 5 at device 29.0 on pci0
usb0: <Intel 82801CA/CAM (ICH3) USB controller USB-A> on uhci0
usb0: USB revision 1.0
uhub0: Intel UHCI root hub, class 9/0, rev 1.00/1.00, addr 1
uhub0: 2 ports with 2 removable, self powered
uhci1: <Intel 82801CA/CAM (ICH3) USB controller USB-B> port 0xb400-0xb41f
irq 9 at device 29.1 on pci0
usb1: <Intel 82801CA/CAM (ICH3) USB controller USB-B> on uhci1
usb1: USB revision 1.0
uhub1: Intel UHCI root hub, class 9/0, rev 1.00/1.00, addr 1
uhub1: 2 ports with 2 removable, self powered
pcib2: <PCI to PCI bridge (vendor=8086 device=2448)> at device 30.0 on
pci0
pci2: <PCI bus> on pcib2
rl0: <RealTek 8139 10/100BaseTX> port 0xa800-0xa8ff mem
0xd6800000-0xd68000ff irq 9 at device 5.0 on pci2
rl0: Ethernet address: 00:e0:18:9a:3d:a6
miibus0: <MII bus> on rl0
rlphy0: <RealTek internal media interface> on miibus0
rlphy0:  10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, auto
chip0: <PCI to CardBus bridge (vendor=1180 device=0476)> irq 5 at device
7.0 on pci2
chip1: <PCI to CardBus bridge (vendor=1180 device=0476)> irq 11 at device
7.1 on pci2
pci2: <unknown card> (vendor=0x1180, dev=0x0552) at 7.2 irq 9
isab0: <PCI to ISA bridge (vendor=8086 device=248c)> at device 31.0 on
pci0
isa0: <ISA bus> on isab0
atapci0: <Intel ICH3 ATA100 controller> port
0x8400-0x840f,0x8800-0x8803,0x9000-0x9007,0x9400-0x9403,0x9800-0x9807 mem
0xd5800000-0xd58003ff irq 9 at device 31.1 on pci0
ata0: at 0x1f0 irq 14 on atapci0
ata1: at 0x170 irq 15 on atapci0
pcm0: <Intel 82801CA (ICH3)> port 0xe100-0xe13f,0xe000-0xe0ff irq 11 at
device 31.5 on pci0
pcm0: <Cirrus Logic CS4299D/E/F/G/H ac97 codec>
pci0: <unknown card> (vendor=0x8086, dev=0x2486) at 31.6 irq 11
orm0: <Option ROM> at iomem 0xc0000-0xcefff on isa0
fdc0: <NEC 72065B or clone> at port 0x3f0-0x3f5,0x3f7 irq 6 drq 2 on isa0
fdc0: FIFO enabled, 8 bytes threshold
fd0: <1440-KB 3.5" drive> on fdc0 drive 0
atkbdc0: <Keyboard controller (i8042)> at port 0x60,0x64 on isa0
atkbd0: <AT Keyboard> flags 0x1 irq 1 on atkbdc0
kbd0 at atkbd0
psm0: <PS/2 Mouse> irq 12 on atkbdc0
psm0: model Generic PS/2 mouse, device ID 0
vga0: <Generic ISA VGA> at port 0x3c0-0x3df iomem 0xa0000-0xbffff on isa0
sc0: <System console> at flags 0x100 on isa0
sc0: VGA <16 virtual consoles, flags=0x300>
sio0 at port 0x3f8-0x3ff irq 4 flags 0x10 on isa0
sio0: type 16550A
sio1 at port 0x2f8-0x2ff irq 3 on isa0
sio1: type 16550A
ppc0: <Parallel port> at port 0x378-0x37f irq 7 on isa0
ppc0: SMC-like chipset (ECP/EPP/PS2/NIBBLE) in COMPATIBLE mode
ppc0: FIFO with 16/16/8 bytes threshold
plip0: <PLIP network interface> on ppbus0
lpt0: <Printer> on ppbus0
lpt0: Interrupt-driven port
ppi0: <Parallel I/O> on ppbus0
ad0: 38154MB <IC25N040ATCS04-0> [77520/16/63] at ata0-master UDMA100
acd0: CD-RW <TOSHIBA DVD-ROM SD-R2102> at ata1-master PIO4
Mounting root from ufs:/dev/ad0s3a


-ip

-- 
Whenever I hear anyone arguing for slavery, I feel a strong impulse to
see it tried on him personally.
		-- A. Lincoln

Hi,

On Mon, Aug 11, 2003 at 10:20:47AM +0200, Igor Pokrovsky
wrote:
> I have problems with enabling support for SMBus on STABLE.
> My motherboard is ICH3 (82801CA).
>
> As suggested in LINT I added 3 lines to my kernel config:
>
> device		smbus
> device		ichsmb
> device		smb
>
> But after compiling, installing and rebooting /dev/smb[01] are
> not available and no changes in kernel startup messages either.
> So I assume something hasn't been detected. I will provide any
> additional info if needed.
>
> Any suggestion or thoughts?
Well FWIW I'm seeing the same on -CURRENT as of yesterday, on a laptop.  The
strange thing is that Intel's ICH3-M documentation says that it supports
SMBus, but the device/function number (which should be D31:F3 according to my
spec) isn't even listed in my pciconf -l output :(

Furthermore I don't get any expected value when using pciconf -r:

[stijn@pounce] <~> sudo pciconf -r -h pci0:31:3 00
ffff
[stijn@pounce] <~> sudo pciconf -r -h pci0:31:3 02
ffff

which should have been 8086 / 2483.

Admittedly know about this >< much about PCI configuration, but somehow I
suspect that the SMBus feature is optional on ICH3 motherboards, or it needs
to be turned on explicitly somehow during the boot. Anyone got any more clue?
> # dmesg:
> atapci0: <Intel ICH3 ATA100 controller> port
0x8400-0x840f,0x8800-0x8803,0x9000-0x9007,0x9400-0x9403,0x9800-0x9807 mem
0xd5800000-0xd58003ff irq 9 at device 31.1 on pci0
> ata0: at 0x1f0 irq 14 on atapci0
> ata1: at 0x170 irq 15 on atapci0
I would expect the SMBus controller to show up here (... at device 31.3
on pci0) but like my dmesg it doesn't.
> pci0: <unknown card> (vendor=0x8086, dev=0x2486) at 31.6 irq 11
This is actually the ICH3 AC '97 modem interface, which gets detected
as 'none0@pci0:31:6' on my laptop.

Like Igor, more info available on request.

--Stijn

-- 
"Well," Brahma said, "even after ten thousand explanations, a
fool is
no wiser, but an intelligent man requires only two thousand five
hundred."
                -- The Mahabharata.
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> From: Igor Pokrovsky [mailto:igor.pokrovsky@cnrm.meteo.fr]
 ... ich3 smbus not showing up in pciconf output ...

see p297 of ICH3 datasheet [intel pn 290733-002], FUNC_DIS register. 

pciconf -r -h 0:31:0

shows the value.
clear bit '3'.

bit 0 should be either set or cleared :) I suspect it should be clear.

this datasheet is on intel's website.

--don

> From: Stijn Hoop [mailto:stijn@win.tue.nl]
> 
> On Tue, Aug 12, 2003 at 03:46:34PM +0200, Igor Pokrovsky wrote:
> > On Tue, Aug 12, 2003 at 09:40:50AM -0400, Don Bowman wrote:
> > 

 ... I'll go out on a limb here... your motherboard doesn't
use SMBus for anything, so the BIOS disables it. Just a guess.
once you enable it (you could make a quirk for it in pci to
get it during boot), you can scan the bus to see, but I suspect
you'll only see the host controller.

--don