From mboxrd@z Thu Jan 1 00:00:00 1970 From: Bret Hughes Subject: serial port discovery on a motion computing tablet Date: Tue, 13 Mar 2007 22:14:19 -0500 Message-ID: <45F7688B.8000101@elevating.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Return-path: Received: from h186.102.16.72.ip.alltel.net ([72.16.102.186]:30419 "EHLO mail1.imperiumsolutions.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752700AbXCNDn0 (ORCPT ); Tue, 13 Mar 2007 23:43:26 -0400 Received: from localhost (unknown [127.0.0.1]) by mail1.imperiumsolutions.net (Postfix) with ESMTP id 01BDCBF9057 for ; Wed, 14 Mar 2007 03:14:29 +0000 (UTC) Received: from mail1.imperiumsolutions.net ([127.0.0.1]) by localhost (xypris.imperiumsolutions.net [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id e-1WnLlyEbnP for ; Tue, 13 Mar 2007 22:14:27 -0500 (CDT) Received: from [10.23.0.144] (wsip-68-99-77-157.tu.ok.cox.net [68.99.77.157]) by mail1.imperiumsolutions.net (Postfix) with ESMTP id C2EB5BF8FBE for ; Tue, 13 Mar 2007 22:14:26 -0500 (CDT) Sender: linux-acpi-owner@vger.kernel.org List-Id: linux-acpi@vger.kernel.org To: linux-acpi@vger.kernel.org I am evaluating a motion computing LE1600 tablet for possible use with linux using Centos 4.4 since that is what we use for several servers and had the installation media handy. This device uses a TouchKO serial touchscreen that has been used by linux in the past but the issue I am facing is that the bios does not expose the serial ports. I spoke with an engineer at TouchKO familiar with the LE1600 project an he told me I would have to access the serial port via acpi. Hmm says I, I guess I have some reading to do. DO after a day or so of trying to get up to speed, I feel I can ask a fairly decent question or two. I found a lot of wacom references but as this touchscreen has ELO and Microtouch emulations I am hard pressed to figure out where to separate the detection of the port from the driver of the device. What I need to do is get a connection to the serial port send a couple of commands to it to set the baud rate and emulation mode and then start X where the MuTouch Driver should work. So. Is this where I need to be asking acpi serial port questions? I found a tc1100 prog somewhere but could not get it to compile correctly, pacpidump compiled ok and I have the output of of acpidump if that helps. Is this a doable deal? I dled the current (2.6.9-42xxx I think) kernel tree from Centos as the last thing I did before leaving work today and will look at both how Centos (and the upstream provider) configure the kernel and if there are options that look like it might work. Googling today turned up several references to a 8250_acpi module and then I found a patch somewhere that indicated that it was no longer needed. I wish I had looked at the kernel tree before leaving today but I thought i would ask for some tips to get me going and possibly add some known good hardware to the list before I am done. Am I correct in thinking that I should be able to get a reference to the serial port through acpi on this box? Any tips ? Any testing that you guys would like done while I have this hardware? TIA Bret