linux-kernel - Re: How to access serial port that is set in BIOS as OS Controlled

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Date:	Thu, 4 Aug 2011 14:56:57 +0400
From:	Andrey Panin <pazke@...trinvest.ru>
To:	Jeff Chua <jeff.chua.linux@...il.com>
Cc:	lkml <linux-kernel@...r.kernel.org>
Subject: Re: How to access serial port that is set in BIOS as OS Controlled

On 209, 07 28, 2011 at 01:43:11PM +0800, Jeff Chua wrote:
> I'm trying to access the serial port ttyS2 that is set in the BIOS as
> "OS Controlled" without much success. If it's set it to "Always
> Enabled",  I can access the serial port.
> 
> This is on the Intermec CV60, and ttyS2 is the touchscreen port.
> 
> # setserial /dev/ttyS2
> /dev/ttyS2, UART: 16550A, Port: 0x03e8, IRQ: 6
> 
> 
> If I set the BIOS to "OS Controlled", I can't access the serial port
> no matter what parameter I pass to the setserial. The factory default
> is "OS Controlled", and Window XP can detect and access the port.
> There will be hundreds of CV60 to get into the BIOS to set it one by
> one. If there's a way to access the port in linux, it'll be great!

Does lspnp show this port in "OS Controlled" mode ?
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