From owner-freebsd-multimedia@FreeBSD.ORG  Fri Oct 26 13:59:17 2007
Return-Path: <owner-freebsd-multimedia@FreeBSD.ORG>
Delivered-To: freebsd-multimedia@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34])
	by hub.freebsd.org (Postfix) with ESMTP id 827A916A417
	for <freebsd-multimedia@freebsd.org>;
	Fri, 26 Oct 2007 13:59:17 +0000 (UTC)
	(envelope-from tinguely@casselton.net)
Received: from casselton.net (casselton.net [63.165.140.2])
	by mx1.freebsd.org (Postfix) with ESMTP id 3711313C491
	for <freebsd-multimedia@freebsd.org>;
	Fri, 26 Oct 2007 13:59:17 +0000 (UTC)
	(envelope-from tinguely@casselton.net)
Received: from casselton.net (localhost [127.0.0.1])
	by casselton.net (8.13.8/8.13.8) with ESMTP id l9QDxGk2088303;
	Fri, 26 Oct 2007 08:59:16 -0500 (CDT)
	(envelope-from tinguely@casselton.net)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=casselton.net;
	s=ccnMail; t=1193407156; bh=iZvOt140LJ4ASBpNqsU9jUs3mJl4tjrCV6S8Flq
	2CkQ=; h=Date:From:Message-Id:To:Subject:Cc:In-Reply-To; b=gwGYQEVK
	Vys58kzQa29WegHLms38t8vha1DrECq8MkhpWcPjezyuLZ02hY86meqWDDdJYX9bMiL
	WsvC6cd9MzesEWilgwk9KiqqLz8+EyNiMdTNmen0hzusTd9owdYLz3w0NBOuEguBhlL
	sWPz7yTspO13Osd9cfqKy2huIOZ4U=
Received: (from tinguely@localhost)
	by casselton.net (8.13.8/8.13.8/Submit) id l9QDxFZh088302;
	Fri, 26 Oct 2007 08:59:15 -0500 (CDT) (envelope-from tinguely)
Date: Fri, 26 Oct 2007 08:59:15 -0500 (CDT)
From: Mark Tinguely <tinguely@casselton.net>
Message-Id: <200710261359.l9QDxFZh088302@casselton.net>
To: achill@matrix.gatewaynet.com, tinguely@casselton.net
In-Reply-To: <200710261113.18925.achill@matrix.gatewaynet.com>
Cc: freebsd-multimedia@freebsd.org
Subject: Re: bktr and GPIO
X-BeenThere: freebsd-multimedia@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: Multimedia discussions <freebsd-multimedia.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-multimedia>, 
	<mailto:freebsd-multimedia-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-multimedia>
List-Post: <mailto:freebsd-multimedia@freebsd.org>
List-Help: <mailto:freebsd-multimedia-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-multimedia>, 
	<mailto:freebsd-multimedia-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Fri, 26 Oct 2007 13:59:17 -0000


(deleted information. He is interested in getting the Zoneminder bktr(8)
based relays to work).

>  I have some contact with the person who manufactures the cards and writes the 
>  linux drivers, and he asked me if FreeBSD has access to bt878 GPIO, and said
>  that it would be easy if so.


You will need to know what values need to be writen to which register to
enable the particular relay. In the kernel driver source program, add
a new ioctl() so that you can enable this feature from the user program.

The command inside the new ioctl() will probably look roughly like:

#ifdef OPTIONAL_READ_OLD
	/* optionally may need to preserve some other settings */
set = (IN#(bktr, BKTR_GPIO_@@@@) & ~mask) | set;
#endif
OUT#(bktr, BKTR_GPIO_@@@@, set);	/* turn on relay "value" */

 where
     mask   optional turn off bits
      set   enable bits 
	 #  is the size (B)yte, (W)ord, (L)ong
       @@@@ is the register location (you probably will have to add a
	    define for this location into the header file).

--Mark Tinguely