From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from lorien.elatec.si ([193.77.58.106] helo=lorien.ee.epico.si) by canuck.infradead.org with esmtps (Exim 4.63 #1 (Red Hat Linux)) id 1HoKgJ-000646-DH for linux-mtd@lists.infradead.org; Wed, 16 May 2007 10:40:53 -0400 Received: from [192.168.0.3] (telperion.ee.epico.si [192.168.0.3]) by lorien.ee.epico.si (8.12.11.20060308/8.12.11) with ESMTP id l4GEeesf013932 for ; Wed, 16 May 2007 16:40:40 +0200 Message-ID: <464B17F3.9040804@users.sourceforge.net> Date: Wed, 16 May 2007 16:40:51 +0200 From: Savin Zlobec MIME-Version: 1.0 To: linux-mtd@lists.infradead.org Subject: Problems with ST NAND512W3A nand flash Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit List-Id: Linux MTD discussion mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Hi All! I am working on a AT91RM9200 based board with ST NAND512W3A2B flash. Kernel version is 2.6.19.7 with patches from maxim.org.za/at91_26.html. Everything works perfectly, except for boot time NAND chip identification which fails every once in a while. NAND signature is 0x20 0x76, but sometimes I get 0x20 0x20. My first guess was timing problems, but I've double checked everything and all signals are inside the specs. I've also tested the chip with shorter and longer setup, hold and pulse times for read and write, but without any success. Trying different kernels didn't help either. Any ideas and/or comments would be very much appreciated. Thanks, savin