From owner-freebsd-current@FreeBSD.ORG Sun Mar 13 18:21:32 2005 Return-Path: Delivered-To: freebsd-current@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 0655816A4CF for ; Sun, 13 Mar 2005 18:21:32 +0000 (GMT) Received: from smtp02.net-yan.com (smtp02.hgcbroadband.com [210.0.255.157]) by mx1.FreeBSD.org (Postfix) with ESMTP id 1ABA543D41 for ; Sun, 13 Mar 2005 18:21:31 +0000 (GMT) (envelope-from sam.wun@authtec.com) Received: (qmail 72798 invoked from network); 13 Mar 2005 18:21:29 -0000 Received: from unknown (HELO [192.168.4.235]) (samwun@hgcbroadband.com@[221.126.232.37]) (envelope-sender ) by localhost (qmail-ldap-1.03) with SMTP for ; 13 Mar 2005 18:21:29 -0000 Message-ID: <4234849A.90505@authtec.com> Date: Mon, 14 Mar 2005 02:21:14 +0800 From: sam wun User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.7) Gecko/20040616 X-Accept-Language: en-us, en MIME-Version: 1.0 To: freebsd-current@freebsd.org Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Subject: _IOWR X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 13 Mar 2005 18:21:32 -0000 Hi, I have a special hardware would like to integrate with FreeBSD. I most probably need to write a driver for it. As I look thru some device driver code, I found this function/macro _IOWR() written in may places of the driver code. Where can I find how does this macro/function defined in FreeBSD? Thanks Sam