SMBus controller listed in DSDT, hidden with lspci

SMBus controller listed in DSDT, hidden with lspci

[Carl-Daniel Hailfinger]

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Hi,

my Samsung P35 notebook has a strange quirk: The SMBus
controller doesn't show up in lspci, but the DSDT claims
it is there. Are there any chances to unhide it with a
special hack or something?

Atached is my disassembled DSDT and the output of lspci.

The device 0000:00:1f.3, which should be the SMBus
controller, simply doesn't show up in lspci.
I suspect it to be something like
0000:00:1f.3 SMBus: Intel Corp. 82801DB/DBL/DBM (ICH4/ICH4-L/ICH4-M) SMBus Controller (rev 03)

It could be that this is related to the ASUS L3C problems
reported august 2004.

Any help would be greatly appreciated.

Regards,
Carl-Daniel
-- 
http://www.hailfinger.org/

[-- Attachment #2: dsdt_orig.dsl.bz2 --]
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[-- Attachment #3: lspci --]
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0000:00:00.0 Host bridge: Intel Corp. 82855PM Processor to I/O Controller (rev 21)
0000:00:01.0 PCI bridge: Intel Corp. 82855PM Processor to AGP Controller (rev 21)
0000:00:1d.0 USB Controller: Intel Corp. 82801DB/DBL/DBM (ICH4/ICH4-L/ICH4-M) USB UHCI Controller #1 (rev 03)
0000:00:1d.1 USB Controller: Intel Corp. 82801DB/DBL/DBM (ICH4/ICH4-L/ICH4-M) USB UHCI Controller #2 (rev 03)
0000:00:1d.2 USB Controller: Intel Corp. 82801DB/DBL/DBM (ICH4/ICH4-L/ICH4-M) USB UHCI Controller #3 (rev 03)
0000:00:1d.7 USB Controller: Intel Corp. 82801DB/DBM (ICH4/ICH4-M) USB 2.0 EHCI Controller (rev 03)
0000:00:1e.0 PCI bridge: Intel Corp. 82801 PCI Bridge (rev 83)
0000:00:1f.0 ISA bridge: Intel Corp. 82801DBM LPC Interface Controller (rev 03)
0000:00:1f.1 IDE interface: Intel Corp. 82801DBM (ICH4) Ultra ATA Storage Controller (rev 03)
0000:00:1f.5 Multimedia audio controller: Intel Corp. 82801DB/DBL/DBM (ICH4/ICH4-L/ICH4-M) AC'97 Audio Controller (rev 03)
0000:00:1f.6 Modem: Intel Corp. 82801DB/DBL/DBM (ICH4/ICH4-L/ICH4-M) AC'97 Modem Controller (rev 03)
0000:01:00.0 VGA compatible controller: ATI Technologies Inc RV350 [Mobility Radeon 9600 M10]
0000:02:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL-8139/8139C/8139C+ (rev 10)
0000:02:01.0 CardBus bridge: Ricoh Co Ltd RL5c476 II (rev ac)
0000:02:01.1 CardBus bridge: Ricoh Co Ltd RL5c476 II (rev ac)
0000:02:01.2 FireWire (IEEE 1394): Ricoh Co Ltd R5C552 IEEE 1394 Controller (rev 04)
0000:02:02.0 Network controller: Intel Corp. PRO/Wireless 2200BG (rev 05)

Re: SMBus controller listed in DSDT, hidden with lspci

[Nikolaus Filus]

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On Sat, Feb 12, 2005 at 04:18:38AM +0100, Carl-Daniel Hailfinger wrote:
>Hi,
>
>my Samsung P35 notebook has a strange quirk: The SMBus
>controller doesn't show up in lspci, but the DSDT claims
>it is there. Are there any chances to unhide it with a
>special hack or something?
>
>Atached is my disassembled DSDT and the output of lspci.
>
>The device 0000:00:1f.3, which should be the SMBus
>controller, simply doesn't show up in lspci.
>I suspect it to be something like
>0000:00:1f.3 SMBus: Intel Corp. 82801DB/DBL/DBM (ICH4/ICH4-L/ICH4-M) SMBus Controller (rev 03)

found a patch on www.p35-forum.de and applied it, now using lm90 driver
I can read temperature values for 2 thermal zones (different values from the ACPI ones)
in /sys/bus/i2c/... but writing to them shows still no result. I can't tune the fan
on/off values :(

Nikolaus


[-- Attachment #2: smbus-2.6.11rc3.patch --]
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--- linux/drivers/pci/quirks.c.org	2005-02-14 14:49:18.000000000 +0100
+++ linux/drivers/pci/quirks.c	2005-02-14 14:51:37.000000000 +0100
@@ -791,6 +791,12 @@
 			case 0x12bc: /* HP D330L */
 				asus_hides_smbus = 1;
 			}
+       } else if (unlikely(dev->subsystem_vendor == 0x144d)) {
+               if (dev->device ==  PCI_DEVICE_ID_INTEL_82855PM_HB)
+                       switch(dev->subsystem_device) {
+                       case 0xC00C: /* Samsung P35 */
+                               asus_hides_smbus = 1;
+                       }
 	}
 }
 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL,	PCI_DEVICE_ID_INTEL_82845_HB,	asus_hides_smbus_hostbridge );