linux-kernel - Re: What pokes the ISA IO port of 0x211 ?

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Message-ID: <480CFA42.20408@keyaccess.nl>
Date:	Mon, 21 Apr 2008 22:34:10 +0200
From:	Rene Herman <rene.herman@...access.nl>
To:	Frantisek Rysanek <Frantisek.Rysanek@...t.cz>
CC:	linux-kernel@...r.kernel.org
Subject: Re: What pokes the ISA IO port of 0x211 ?

On 21-04-08 22:05, Rene Herman wrote:

> On 21-04-08 13:12, Frantisek Rysanek wrote:
>> Dear Everyone,
>>
>> I'm dealing with an embedded PC motherboard that contains some custom 
>> circuitry (GPIO), accessible via an ISA IO range between 0x200 and 
>> 0x218. 
>> There's an interesting issue with this in recent Linux (tried 2.6.22.6 
>> and 2.6.24.2): something probes IO port 0x211 on boot, which happens 
>> to be an add-on buzzer control port - effectively the kernel boot 
>> launches an accoustic alarm :-) 
>> Any ideas what this could be? 
> 
> ISAPnP default read data port is close at 0x213...
> 
> I haven't checked but this also reminds me of sensor chips. Do you have 
> sensor drivers builtin?

Ah, it's the old analog gameport: ns558_init.

Rene.
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