linux-kernel - Re: How to access correctly serial port inside module?

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Message-ID: <4648C5B5.70408@gmx.de>
Date:	Mon, 14 May 2007 22:25:25 +0200
From:	"Lars K.W. Gohlke" <lkwg82@....de>
To:	Jan Engelhardt <jengelh@...ux01.gwdg.de>
CC:	linux-kernel@...r.kernel.org
Subject: Re: How to access correctly serial port inside module?

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Jan Engelhardt schrieb:
> On May 14 2007 19:40, Lars K.W. Gohlke wrote:
>>> hallo,
>>>
>>> after searching the mailing list and searching the web, I still don't
>>> know how to access correctly the serial port (in user space known as
>>> /dev/ttyS01)
>
> http://kernelnewbies.org/FAQ/WhyWritingFilesFromKernelIsBad
>
>>> This thread ends before the answer was given and the site redirecting
>>> too is restructured:
>>> http://marc.info/?l=kernelnewbies&m=98314502419089&w=2
>>>
>>> would somebody be so kind to give me an example:
>>>
>>> with this behaviour:
>>>
>>> 1. read from port
>>> 2. output via printk()
>>> 3. write to port
>
> inb/inw/inl, printk, outb/outw/outl.
>
>>> I've created already my own char-dev and used it in user-space.
>>> However I don't know really how to get information from kernel-code to
>>> solve this.
>
> http://lwn.net/Kernel/LDD3/
>
>> would be somebody so polite and give me at least a hint?
>> Where to search concretely, or small template.
>
> It's been 4 hours and 40 minutes, and you already expect an answer?
> I don't remember you having paid anyone...
>
>
> 	Jan


sorry, for my impatience, but I saw the traffic on the list and was
wondering ... .

Nevermind, thx.
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