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Message-ID: <20050331053744.97435.qmail@web53903.mail.yahoo.com>
Date: Wed, 30 Mar 2005 21:37:44 -0800 (PST)
From: nobin matthew <nobin_matthew@yahoo.com>
Subject: HELP: PC104 IO card driver Problem
To: linux-kernel@vger.kernel.org
Cc: linux-net@vger.kernel.org, linux-kernel@vger.kernel.org,
       kernelnewbies@nl.linux.org
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Sender: linux-kernel-owner@vger.kernel.org
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Lines: 60

Dear Friends,

Can anybody Help me in this Pc104 driver Problem;
What is the basics steps in doing read and write on
Pc104 cards.

Deatails Given Below:
              I am writing a Linux device driver for
Diamond systems
IR104 digital IO card. This is a PC104 bus device(that
means it ISA
bus compatible).
The Platform is Arcom Viper borad(with support for
PC104), This is a
Xscale, Little endian Platform.

The Specification of PC104 interface  given in Viper
borad manual is:
0x3C000000-0x3CFFFFFF PC/104 memory space(16MB)
0x30000000-0x300003FF PC/104 IO space(1KB)

Specification given in IR104 manual is:
I made the jumber setting so that, the IO space
addresses  taken by 8
registers will be 0x300-0x307

The driver should do read and write on this
registers(character device
driver).

I took two approaches one is:
i added IO space and 0x300, did inb() and oub().(IO
space base address
and 0x300)
otherway i did ioremap on added result, did inb() and
oub().

In the second method:
I did same procedures using IO memory space

both methods are giving errors, i think that is
related to paging. i think
there is a need for disabling paging in this space.

Please help regarding this. How to solve this.

Nobin Mathew


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