Intel ICH7 SMBus support, ichsmb(4)

Miroslav Lachman 000.fbsd at quip.cz
Thu Sep 11 09:51:28 UTC 2008


Jeremy Chadwick wrote:
> On Wed, Sep 10, 2008 at 11:19:10PM +0100, Bruce M Simpson wrote:
> 
>>Hi there,
>>
>>I have been looking at a system which has the Intel ICH7 south bridge.
>>
>>Whenever I try to probe the SMBus on this system with 'smbmsg -p', I get  
>>a lot of status=41 timeout messages in dmesg from the ichsmb(4) driver.
>>
>>I have been given the addresses of the SMBus peripherals and have tried  
>>initiating reads to their register space directly using 'smbmsg', with  
>>the same result.
> 
> 
> Yes, I have seen this behaviour but *only* when querying a slave address
> which was incorrect or had no device tied to it.  You should not be
> using the "8-bit data address".
> 
> 
>>* Has anyone seen the same issues with the ICH7?
> 
> 
> All of my development on bsdhwmon has been done exclusively on ICH7
> chipsets, except for the hardware I don't have access to (which use
> other chipsets, but still use ichsmb(4)):
> 
> http://bsdhwmon.parodius.com/
> 
> During early development of bsdhwmon, I used smbmsg exclusively for
> testing.
> 
> So in that respect, no, I've never seen the problem you report.

Are you still actively working on bsdhwmon and do you plan to support 
non-Supermicro servers? I wrote you an e-mail in June about my interest 
in testing thist project on my servers, but got no reply.

I have some Sun Fire X2100 M2 (nVidia chips), IBM x335 (Intel), IBM x336 
(Intel) servers and one Supermicro X6DHP-8G (Intel) server.

Miroslav Lachman


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