From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from m15-114.126.com ([220.181.15.114]) by merlin.infradead.org with esmtp (Exim 4.76 #1 (Red Hat Linux)) id 1TbpNl-0008Ii-D2 for barebox@lists.infradead.org; Fri, 23 Nov 2012 09:17:12 +0000 Date: Fri, 23 Nov 2012 17:17:53 +0800 From: =?utf-8?B?5byg5b+g5bGx?= Message-ID: <20121123091753.GF3022@greatfirst.com> MIME-Version: 1.0 Content-Disposition: inline List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: barebox-bounces@lists.infradead.org Errors-To: barebox-bounces+u.kleine-koenig=pengutronix.de@lists.infradead.org Subject: NAND_ATMEL strange behavior on at91rm9200 board To: barebox when NAND_ATMEL used on at91rm9200, it's behavior very strange write to nand have no effect, Read out of nand, the contents very strange. So I write some date to nand using u-boot and then start barebox ---------- # md -s/dev/nand0 0+0x400 00000000: ea00000a eafffffe eafffffe eafffffe ................ 00000010: eafffffe 0000016c eafffffe eafffffe ....l........... 00000020: 65726162 00786f62 23b00000 00020ea9 barebox....#.... 00000030: e10f3000 e3c3301f e38330d3 e129f003 .0...0...0....). 00000040: 00000000 00000000 00000000 00000400 ................ 00000050: 00000000 00000000 00000000 00000000 ................ 00000060: 00000000 00000000 00000000 00000000 ................ 00000070: 00000000 00000000 00000000 00000000 ................ 00000080: 00000000 00000000 00000000 00000000 ................ 00000090: 00000000 00000000 00000000 00000000 ................ 000000a0: 00000000 00000000 00000000 00000000 ................ 000000b0: 00000000 00000000 00000000 00000000 ................ 000000c0: 00000000 00000000 00000000 00000000 ................ 000000d0: 00000000 00000000 00000000 00000000 ................ 000000e0: 00000000 00000000 00000000 00000000 ................ 000000f0: 00000000 00000000 00000000 00000000 ................ 00000100: e1a04000 e50c306f e1a01002 e1a03002 .@..o0.......0.. 00000110: e28ee001 e35e0008 e5843000 1afffffb ......^..0...... 00000120: e3e02000 e3a03003 e502306f e3a03e2e . ...0..o0...>.. 00000130: e5841000 e502306b e5841000 e502106f ....k0......o... 00000140: 00000000 00000000 00000000 00000000 ................ 00000150: 00000000 00000000 00000000 00000000 ................ 00000160: 00000000 00000000 00000000 00000000 ................ 00000170: 00000000 00000000 00000000 00000000 ................ 00000180: 00000000 00000000 00000000 00000004 ................ 00000190: 00000000 00000000 00000000 00000000 ................ .... But the datas should be: 00000000: ea00000a eafffffe eafffffe eafffffe ................ 00000010: eafffffe 0000016c eafffffe eafffffe ....l........... 00000020: 65726162 00786f62 23b00000 000200fa barebox....#.... 00000030: e10f3000 e3c3301f e38330d3 e129f003 .0...0...0....). 00000040: ee113f10 e3c33d8e e3c33005 e3833a01 .?...=...0...:.. 00000050: e3833002 ee013f10 e3e02000 e51233cf .0...?... ...3.. 00000060: e3130003 1a000039 e59f30e4 e1a01002 ....9....0...... 00000070: e50233df e5113397 e3130001 0afffffc .3...3.......... 00000080: e3a03000 e501309b e59f30c8 e3e02000 .0...0...0... .. 00000090: e501308f e59f30c0 e50133d7 e5123397 .0...0...3...3.. 000000a0: e3130002 0afffffc e3a03c01 e50233cf .........<...3.. 000000b0: e59f30a8 e3e0c000 e50233cf e51c3397 .0.......3...3.. 000000c0: e3130008 0afffffc e59f3094 e3a02000 .........0... .. 000000d0: e50c378f e50c278b e50c37fb e59f3084 .7...'...7...0.. 000000e0: e3a01002 e50c109f e3a00202 e50c3067 ............g0.. 000000f0: e3a03004 e50c106f e1a0e002 e5802000 .0..o........ .. ...... It looks like there are 64bytes correct data in every 256 bytes. It's so strange!! After study barebox source codes. I found atmel_read_buf use memcpy_fromio to read. I can't understand it. May be on at91samxxx cpu it's right. So I let "nand_chip->read_buf = NULL" to let it use the default read function. After this , It's OK I has no at91sam board, So anybody tell me is this behavior specific to at91rm9200? -- Best Regards, zzs _______________________________________________ barebox mailing list barebox@lists.infradead.org http://lists.infradead.org/mailman/listinfo/barebox