Date: Thu, 30 Nov 2000 00:54:23 -0500 From: Jonathan Chen <jon@spock.org> To: Terry Glanfield <Terry.Glanfield@program-products.co.uk> Cc: hardware@FreeBSD.ORG Subject: Re: ServerWorks SMbus Message-ID: <20001130005423.C50250@spock.org> In-Reply-To: <200011291716.RAA19113@program-products.co.uk>; from Terry.Glanfield@program-products.co.uk on Wed, Nov 29, 2000 at 05:16:16PM %2B0000 References: <200011291716.RAA19113@program-products.co.uk>
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On Wed, Nov 29, 2000 at 05:16:16PM +0000, Terry Glanfield wrote:
> Has anyone done any work to support the SMbus on the ServerWorks
> ServerSet III chipset?
I poked around a bit trying to get /dev/smb0 working for reading system
temperature and stuff, and couldn't get it to work for some reason. The
board in question is a ServerSet II LE (SuperMicro 370DLE, dual proc) on
-STABLE. I had the proper kernel options and compiled consolehm from
ports.
When consolehm is ran, ENODEV is returned after using ioctl()'s on
/dev/smb0. Tracing through the kernel reveals pcf_wait_byte() in
sys/i386/pcf.c was failing. Each PCF_GET_S1() would return 0xff.
I have no clue how iic or smb works, perhaps someone with more clue can
take a crack at this?
The call stack is something like:
pcf_wait_byte(...) [ in i386/isa/pcf.c ]
pcfstart(...) [ in i386/isa/pcf.c ]
iicsmb_readb(...) [ in dev/iicbus/iicsmb.c ]
smbioctl(?, SMB_READB, ...) [ in dev/smbus/smb.c ]
The relavent portions of dmesg is below:
FreeBSD 4.2-RELEASE #0: Tue Nov 21 03:10:05 GMT 2000
[...]
pcib0: <ServerWorks NB6635 3.0LE host to PCI bridge> on motherboard
[...]
isab0: <ServerWorks IB6566 PCI to ISA bridge> at device 15.0 on pci0
[...]
pcf0: <PCF8584 I2C bus controller> at port 0x320-0x321 irq 5 on isa0
iicbus0: <Philips I2C bus> on pcf0 addr 0xaa
iicsmb0: <I2C to SMB bridge> on iicbus0
smbus0: <System Management Bus> on iicsmb0
smb0: <SMBus general purpose I/O> on smbus0
iic0: <I2C general purpose I/O> on iicbus0
BTW, nothing else should be on the same ioport/irq as pcf or iicbus.
--
(o_ 1-2-1-2-1-2-1-2-1-2-1-2-1-2-1-2-1-2-1-2-1-2-1-2-1-2-1-2-1-2 _o)
\\\_\ Jonathan Chen jon@spock.org /_///
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