From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 6746 invoked by alias); 19 Mar 2014 14:44:27 -0000 Mailing-List: contact ecos-discuss-help@ecos.sourceware.org; run by ezmlm Precedence: bulk List-Id: List-Subscribe: List-Archive: List-Post: List-Help: , Sender: ecos-discuss-owner@ecos.sourceware.org Received: (qmail 6717 invoked by uid 89); 19 Mar 2014 14:44:26 -0000 Authentication-Results: sourceware.org; auth=none X-Virus-Found: No X-Spam-SWARE-Status: No, score=-2.6 required=5.0 tests=AWL,BAYES_00,FREEMAIL_FROM,RCVD_IN_DNSWL_LOW,SPF_PASS autolearn=ham version=3.3.2 X-HELO: mail-ee0-f46.google.com Received: from mail-ee0-f46.google.com (HELO mail-ee0-f46.google.com) (74.125.83.46) by sourceware.org (qpsmtpd/0.93/v0.84-503-g423c35a) with (AES128-SHA encrypted) ESMTPS; Wed, 19 Mar 2014 14:44:25 +0000 Received: by mail-ee0-f46.google.com with SMTP id t10so6585959eei.5 for ; Wed, 19 Mar 2014 07:44:21 -0700 (PDT) X-Received: by 10.14.4.6 with SMTP id 6mr35906175eei.47.1395240261761; Wed, 19 Mar 2014 07:44:21 -0700 (PDT) Received: from [10.0.4.19] (34.16-66-87.adsl-static.isp.belgacom.be. [87.66.16.34]) by mx.google.com with ESMTPSA id p8sm42810693eef.26.2014.03.19.07.44.20 for (version=TLSv1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Wed, 19 Mar 2014 07:44:20 -0700 (PDT) Message-ID: <5329AD1D.5080401@gmail.com> Date: Wed, 19 Mar 2014 14:44:00 -0000 From: =?UTF-8?B?R2HDq3RhbiBDYXJsaWVy?= User-Agent: Mozilla/5.0 (X11; Linux i686; rv:24.0) Gecko/20100101 Thunderbird/24.3.0 MIME-Version: 1.0 To: =?UTF-8?B?RXJpYyBCw6luYXJk?= CC: ecos-discuss@ecos.sourceware.org References: <53285E7A.5040102@gmail.com> <20140319094746.4e44f753@e6520eb> In-Reply-To: <20140319094746.4e44f753@e6520eb> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit X-IsSubscribed: yes Subject: Re: [ECOS] Problem of coldboot on i.MX27 board with Micron NAND X-SW-Source: 2014-03/txt/msg00009.txt.bz2 Hi Eric, On 03/19/2014 09:47 AM, Eric Bénard wrote: > Hi Gaëtan, > > Le Tue, 18 Mar 2014 15:55:54 +0100, > Gaëtan Carlier a écrit : >> I have a problem with redboot (release 20050912) with Freescale patches >> for i.MX27 PDK (3-stack) and seems to be related to NAND chip (all other >> components are identical). >> When I power on the board, nothing happened on serial console but when I >> press reset button (or if I reset board using JTAG, to board boot properly. >> >> With NAND Numonyx NAND02G-B2D, it works well on power on but with Micron >> MT29F2G08ABBEAH4, coldboot does not work, I have to press RESET button. >> >> The specs seem to be similar. The only difference is a device >> initialization for Micron that says that host must wait 100us after VCC >> is applied before sending Reset (FFh) command. >> Where have I to place the wait loop ? >> At the beginning of In PLATFORM_SETUP1 macro (.macro _platform_setup1) >> in hal_platform_setup.h or anywhere else ? >> >> Test is done on boards with i.MX27 CPUs that have different revision >> (200951, 201209). And I know that newer revison (starting from 2012) can >> freeze at boot due to bug in PLL circuit. >> Do you have any other leads for me ? >> > Micron NAND need a reset command at boot and i.MX27's BootROM doesn't > send it when using external boot. > See the note in page 5 of this AN : > cache.freescale.com/files/dsp/doc/app_note/AN3672.pdf > > Internal NAND boot seems to works based on this thread (not tested > here) : https://community.freescale.com/thread/285717 > So it is not possible to boot correctly on external Micron NAND flash using i.MX27 ?! > Eric > Thank you for your help, Gaëtan Carlier. -- Before posting, please read the FAQ: http://ecos.sourceware.org/fom/ecos and search the list archive: http://ecos.sourceware.org/ml/ecos-discuss