From patchwork Fri Sep 23 13:43:10 2011 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Marek Vasut X-Patchwork-Id: 116074 X-Patchwork-Delegate: scottwood@freescale.com Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from theia.denx.de (theia.denx.de [85.214.87.163]) by ozlabs.org (Postfix) with ESMTP id 78384B6F80 for ; Fri, 23 Sep 2011 23:43:28 +1000 (EST) Received: from localhost (localhost [127.0.0.1]) by theia.denx.de (Postfix) with ESMTP id DC812285EF; Fri, 23 Sep 2011 15:43:26 +0200 (CEST) X-Virus-Scanned: Debian amavisd-new at theia.denx.de Received: from theia.denx.de ([127.0.0.1]) by localhost (theia.denx.de [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id bm56yW9JvcFU; Fri, 23 Sep 2011 15:43:26 +0200 (CEST) Received: from theia.denx.de (localhost [127.0.0.1]) by theia.denx.de (Postfix) with ESMTP id 7F5FE2853A; Fri, 23 Sep 2011 15:43:24 +0200 (CEST) Received: from localhost (localhost [127.0.0.1]) by theia.denx.de (Postfix) with ESMTP id 890862853A for ; Fri, 23 Sep 2011 15:43:22 +0200 (CEST) X-Virus-Scanned: Debian amavisd-new at theia.denx.de Received: from theia.denx.de ([127.0.0.1]) by localhost (theia.denx.de [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 5xv7wrGciS7b for ; Fri, 23 Sep 2011 15:43:21 +0200 (CEST) X-policyd-weight: NOT_IN_SBL_XBL_SPAMHAUS=-1.5 NOT_IN_SPAMCOP=-1.5 NOT_IN_BL_NJABL=-1.5 (only DNSBL check requested) Received: from mail-bw0-f44.google.com (mail-bw0-f44.google.com [209.85.214.44]) by theia.denx.de (Postfix) with ESMTPS id A87D828519 for ; Fri, 23 Sep 2011 15:43:20 +0200 (CEST) Received: by bkaq10 with SMTP id q10so3390617bka.3 for ; Fri, 23 Sep 2011 06:43:19 -0700 (PDT) Received: by 10.204.139.68 with SMTP id d4mr2531786bku.90.1316785399749; Fri, 23 Sep 2011 06:43:19 -0700 (PDT) Received: from mashiro.ms.mff.cuni.cz (eduroam113.ms.mff.cuni.cz. [195.113.21.113]) by mx.google.com with ESMTPS id fc13sm11593308bkc.0.2011.09.23.06.43.18 (version=SSLv3 cipher=OTHER); Fri, 23 Sep 2011 06:43:18 -0700 (PDT) From: Marek Vasut To: u-boot@lists.denx.de Date: Fri, 23 Sep 2011 15:43:10 +0200 Message-Id: <1316785390-17006-1-git-send-email-marek.vasut@gmail.com> X-Mailer: git-send-email 1.7.5.4 In-Reply-To: <1316716571-2876-1-git-send-email-marek.vasut@gmail.com> References: <1316716571-2876-1-git-send-email-marek.vasut@gmail.com> Cc: Scott Wood Subject: [U-Boot] [PATCH 2/5 V4] NAND: Add nand read.raw and write.raw commands X-BeenThere: u-boot@lists.denx.de X-Mailman-Version: 2.1.9 Precedence: list List-Id: U-Boot discussion List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Sender: u-boot-bounces@lists.denx.de Errors-To: u-boot-bounces@lists.denx.de These commands should work around various "hardware" ECC and BCH methods. Signed-off-by: Marek Vasut Cc: Scott Wood Cc: Stefano Babic Cc: Wolfgang Denk Cc: Detlev Zundel --- common/cmd_nand.c | 19 +++++++++++++++++++ doc/README.nand | 9 +++++++++ 2 files changed, 28 insertions(+), 0 deletions(-) V2: Add documentation. V3: Drop size param. V4: Dont drop size of read/write commands, operate on pages diff --git a/common/cmd_nand.c b/common/cmd_nand.c index 66e06a5..14c7c09 100644 --- a/common/cmd_nand.c +++ b/common/cmd_nand.c @@ -606,6 +606,22 @@ int do_nand(cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[]) ret = nand->read_oob(nand, off, &ops); else ret = nand->write_oob(nand, off, &ops); + } else if (!strcmp(s, ".raw")) { + /* Raw access */ + mtd_oob_ops_t ops = { + .datbuf = (u8 *)addr, + .oobbuf = ((u8 *)addr) + nand->writesize, + .len = nand->writesize, + .ooblen = nand->oobsize, + .mode = MTD_OOB_RAW + }; + + rwsize = nand->writesize + nand->oobsize; + + if (read) + ret = nand->read_oob(nand, off, &ops); + else + ret = nand->write_oob(nand, off, &ops); } else { printf("Unknown nand command suffix '%s'.\n", s); return 1; @@ -699,6 +715,9 @@ U_BOOT_CMD( "nand write - addr off|partition size\n" " read/write 'size' bytes starting at offset 'off'\n" " to/from memory address 'addr', skipping bad blocks.\n" + "nand read.raw - addr off|partition\n" + "nand write.raw - addr off|partition\n" + " Use read.raw/write.raw to avoid ECC and write the page as-is.\n" #ifdef CONFIG_CMD_NAND_TRIMFFS "nand write.trimffs - addr off|partition size\n" " write 'size' bytes starting at offset 'off' from memory address\n" diff --git a/doc/README.nand b/doc/README.nand index 751b693..023740e 100644 --- a/doc/README.nand +++ b/doc/README.nand @@ -94,6 +94,15 @@ Commands: of data for one 512-byte page or 2 256-byte pages. There is no check for bad blocks. + nand read.raw addr ofs|partition + Read page from `ofs' in NAND flash to `addr'. This reads the raw page, + so ECC is avoided and the OOB area is read as well. + + nand write.raw addr ofs|partition + Write page from `addr' to `ofs' in NAND flash. This writes the raw page, + so ECC is avoided and the OOB area is written as well, making the whole + page written as-is. + Configuration Options: CONFIG_CMD_NAND