From owner-freebsd-arm@FreeBSD.ORG Thu Jun 7 19:46:38 2007 Return-Path: X-Original-To: arm@freebsd.org Delivered-To: freebsd-arm@FreeBSD.ORG Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52]) by hub.freebsd.org (Postfix) with ESMTP id 3F03016A480 for ; Thu, 7 Jun 2007 19:46:38 +0000 (UTC) (envelope-from nb@synthcom.com) Received: from synthcom.com (static-71-245-103-2.ptldor.fios.verizon.net [71.245.103.2]) by mx1.freebsd.org (Postfix) with ESMTP id 1D9EA13C483 for ; Thu, 7 Jun 2007 19:46:38 +0000 (UTC) (envelope-from nb@synthcom.com) Received: from static-71-245-103-2.ptldor.fios.verizon.net (static-71-245-103-2.ptldor.fios.verizon.net [71.245.103.2]) by synthcom.com (8.13.8/8.13.8) with ESMTP id l57Jkbeg076829 for ; Thu, 7 Jun 2007 12:46:37 -0700 (PDT) (envelope-from nb@synthcom.com) Date: Thu, 7 Jun 2007 12:46:37 -0700 (PDT) From: Neil Bradley In-Reply-To: <20070607.133456.74668036.imp@bsdimp.com> Message-ID: <20070607123930.E75948@synthcom.com> References: <50392.2001:6f8:101e:0:20e:cff:fe6d:6adb.1181235257.squirrel@webmail.alpha-tierchen.de> <20070607180946.GK16463@cicely12.cicely.de> <49754.2001:6f8:101e:0:20e:cff:fe6d:6adb.1181244172.squirrel@webmail.alpha-tierchen.de> <20070607.133456.74668036.imp@bsdimp.com> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-3.0 (synthcom.com [71.245.103.2]); Thu, 07 Jun 2007 12:46:37 -0700 (PDT) Cc: arm@freebsd.org Subject: Re: 4-bit SD Card mode X-BeenThere: freebsd-arm@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Porting FreeBSD to the StrongARM Processor List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 07 Jun 2007 19:46:38 -0000 > I'm not sure I like this at all. The devices shouldn't be setting up > the pins for that device. In some cases, they can't know how to do > that, and this is one of them. The device has no way of knowing if > all 4 wires are connected, or just 1 and the 'spare' lines are used > for GPIO. Not doing it will irritate more people (i.e. "I'm not getting full speed out of the SD card). While it's a valid concern, I don't think it's unrealistic to assume that all 4 DAT lines are hooked up. I've not yet encountered a design that A) had SD capabilities, B) was only running single bit because of a lack of GPIOs. -->Neil ---------------------------------------------------------------------------- C. Neil Bradley - KE7IXP - The one eyed man in the land of the blind is not king. He's a prisoner.