From patchwork Wed May 15 08:40:31 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Huang Shijie X-Patchwork-Id: 243954 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from casper.infradead.org (casper.infradead.org [IPv6:2001:770:15f::2]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by ozlabs.org (Postfix) with ESMTPS id D08342C0085 for ; Wed, 15 May 2013 19:01:46 +1000 (EST) Received: from merlin.infradead.org ([2001:4978:20e::2]) by casper.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1UcXXz-0008Qf-HP; Wed, 15 May 2013 08:58:57 +0000 Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1UcXWV-0002ej-JX; Wed, 15 May 2013 08:57:23 +0000 Received: from va3ehsobe004.messaging.microsoft.com ([216.32.180.14] helo=va3outboundpool.messaging.microsoft.com) by merlin.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1UcXWC-0002XA-OF for linux-mtd@lists.infradead.org; Wed, 15 May 2013 08:57:10 +0000 Received: from mail173-va3-R.bigfish.com (10.7.14.232) by VA3EHSOBE003.bigfish.com (10.7.40.23) with Microsoft SMTP Server id 14.1.225.23; Wed, 15 May 2013 08:56:47 +0000 Received: from mail173-va3 (localhost [127.0.0.1]) by mail173-va3-R.bigfish.com (Postfix) with ESMTP id 897B5C0709; Wed, 15 May 2013 08:56:47 +0000 (UTC) X-Forefront-Antispam-Report: CIP:70.37.183.190; KIP:(null); UIP:(null); IPV:NLI; H:mail.freescale.net; RD:none; EFVD:NLI X-SpamScore: 6 X-BigFish: VS6(z3121kzzz1f42h1ee6h1de0h1fdah1202h1e76h1d1ah1d2ah1fc6h1082kzz8275bhz2dh2a8h668h839hd24he5bhf0ah1288h12a5h12a9h12bdh12e5h137ah139eh13b6h1441h1504h1537h162dh1631h1758h1898h18e1h1946h19b5h1ad9h1b0ah1d0ch1d2eh1d3fh1155h) Received: from mail173-va3 (localhost.localdomain [127.0.0.1]) by mail173-va3 (MessageSwitch) id 1368608205917843_461; Wed, 15 May 2013 08:56:45 +0000 (UTC) Received: from VA3EHSMHS010.bigfish.com (unknown [10.7.14.226]) by mail173-va3.bigfish.com (Postfix) with ESMTP id DB1391600A0; Wed, 15 May 2013 08:56:45 +0000 (UTC) Received: from mail.freescale.net (70.37.183.190) by VA3EHSMHS010.bigfish.com (10.7.99.20) with Microsoft SMTP Server (TLS) id 14.1.225.23; Wed, 15 May 2013 08:56:41 +0000 Received: from az84smr01.freescale.net (10.64.34.197) by 039-SN1MMR1-004.039d.mgd.msft.net (10.84.1.14) with Microsoft SMTP Server (TLS) id 14.2.328.11; Wed, 15 May 2013 08:57:04 +0000 Received: from shlinux2.ap.freescale.net (shlinux2.ap.freescale.net [10.192.224.44]) by az84smr01.freescale.net (8.14.3/8.14.0) with ESMTP id r4F8uGQT021512; Wed, 15 May 2013 01:56:38 -0700 From: Huang Shijie To: Subject: [PATCH v5 08/11] mtd: add ECC info for nand_flash_dev{} Date: Wed, 15 May 2013 16:40:31 +0800 Message-ID: <1368607232-2210-9-git-send-email-b32955@freescale.com> X-Mailer: git-send-email 1.7.1 In-Reply-To: <1368607232-2210-1-git-send-email-b32955@freescale.com> References: <1368607232-2210-1-git-send-email-b32955@freescale.com> MIME-Version: 1.0 X-OriginatorOrg: freescale.com X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20130515_045705_574398_5F051B72 X-CRM114-Status: GOOD ( 10.48 ) X-Spam-Score: -2.6 (--) X-Spam-Report: SpamAssassin version 3.3.2 on merlin.infradead.org summary: Content analysis details: (-2.6 points) pts rule name description ---- ---------------------- -------------------------------------------------- -0.7 RCVD_IN_DNSWL_LOW RBL: Sender listed at http://www.dnswl.org/, low trust [216.32.180.14 listed in list.dnswl.org] -1.9 BAYES_00 BODY: Bayes spam probability is 0 to 1% [score: 0.0000] Cc: Huang Shijie , computersforpeace@gmail.com, linux-mtd@lists.infradead.org, linux-kernel@vger.kernel.org, dedekind1@gmail.com X-BeenThere: linux-mtd@lists.infradead.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Linux MTD discussion mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-mtd" Errors-To: linux-mtd-bounces+incoming=patchwork.ozlabs.org@lists.infradead.org Add an instance of an anonymous struct to store the ECC infor for full id nand chips. @ecc.strength: ECC correctability from the datasheet. @ecc.step: ECC size required by the @ecc.strength, Also add the necessary macros to make the code simple and clean. Signed-off-by: Huang Shijie --- include/linux/mtd/nand.h | 15 +++++++++++++++ 1 files changed, 15 insertions(+), 0 deletions(-) diff --git a/include/linux/mtd/nand.h b/include/linux/mtd/nand.h index c503850..718d2c5 100644 --- a/include/linux/mtd/nand.h +++ b/include/linux/mtd/nand.h @@ -625,6 +625,11 @@ struct nand_chip { { .name = (nm), {{ .dev_id = (devid) }}, .chipsize = (chipsz), \ .options = (opts) } +#define NAND_ECC_INFO(_strength, _step) \ + { .strength = (_strength), .step = (_step) } +#define NAND_ECC_STRENGTH(type) ((type)->ecc.strength) +#define NAND_ECC_STEP(type) ((type)->ecc.step) + /** * struct nand_flash_dev - NAND Flash Device ID Structure * @name: a human-readable name of the NAND chip @@ -642,6 +647,12 @@ struct nand_chip { * @options: stores various chip bit options * @id_len: The valid length of the @id. * @oobsize: OOB size + * @ecc.strength: The ECC correctability from the datasheet, same as the + * @ecc_strength in nand_chip{}. + * @ecc.step: The ECC step required by the @ecc.strength, same as the + * @ecc_size in nand_chip{}, also from the datasheet. + * For example, the "4bit ECC for each 512Byte" can be set with + * NAND_ECC_INFO(4, 512). */ struct nand_flash_dev { char *name; @@ -658,6 +669,10 @@ struct nand_flash_dev { unsigned int options; uint16_t id_len; uint16_t oobsize; + struct { + uint16_t strength; + uint16_t step; + } ecc; }; /**