From patchwork Mon Mar 18 11:18:51 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Huang Shijie X-Patchwork-Id: 228478 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from merlin.infradead.org (merlin.infradead.org [IPv6:2001:4978:20e::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 CBC952C00C6 for ; Mon, 18 Mar 2013 23:29:00 +1100 (EST) Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1UHZAG-0006z6-0b; Mon, 18 Mar 2013 12:27:44 +0000 Received: from mail-db8lp0189.outbound.messaging.microsoft.com ([213.199.154.189] helo=db8outboundpool.messaging.microsoft.com) by merlin.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1UHY9J-0008VQ-Gv for linux-mtd@lists.infradead.org; Mon, 18 Mar 2013 11:22:43 +0000 Received: from mail180-db8-R.bigfish.com (10.174.8.230) by DB8EHSOBE033.bigfish.com (10.174.4.96) with Microsoft SMTP Server id 14.1.225.23; Mon, 18 Mar 2013 11:22:38 +0000 Received: from mail180-db8 (localhost [127.0.0.1]) by mail180-db8-R.bigfish.com (Postfix) with ESMTP id F3C104400B6; Mon, 18 Mar 2013 11:22:37 +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(z3121kzzz1f42h1ee6h1de0h1202h1e76h1d1ah1d2ah1082kzz8275bhz2dh2a8h668h839hd24he5bhf0ah1288h12a5h12a9h12bdh12e5h137ah139eh13b6h1441h1504h1537h162dh1631h1758h1898h18e1h1946h19b5h1ad9h1b0ah1155h) Received: from mail180-db8 (localhost.localdomain [127.0.0.1]) by mail180-db8 (MessageSwitch) id 1363605755838508_19525; Mon, 18 Mar 2013 11:22:35 +0000 (UTC) Received: from DB8EHSMHS019.bigfish.com (unknown [10.174.8.228]) by mail180-db8.bigfish.com (Postfix) with ESMTP id C9292A80045; Mon, 18 Mar 2013 11:22:35 +0000 (UTC) Received: from mail.freescale.net (70.37.183.190) by DB8EHSMHS019.bigfish.com (10.174.4.29) with Microsoft SMTP Server (TLS) id 14.1.225.23; Mon, 18 Mar 2013 11:22:35 +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; Mon, 18 Mar 2013 11:22:33 +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 r2IBM63D021313; Mon, 18 Mar 2013 04:22:31 -0700 From: Huang Shijie To: Subject: [PATCH 08/11] mtd: add a new field for ecc info in the nand_flash_dev{} Date: Mon, 18 Mar 2013 19:18:51 +0800 Message-ID: <1363605534-24776-9-git-send-email-b32955@freescale.com> X-Mailer: git-send-email 1.7.1 In-Reply-To: <1363605534-24776-1-git-send-email-b32955@freescale.com> References: <1363605534-24776-1-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-20130318_072241_714491_2B9C728F X-CRM114-Status: UNSURE ( 9.04 ) X-CRM114-Notice: Please train this message. X-Spam-Score: -1.9 (-) X-Spam-Report: SpamAssassin version 3.3.2 on merlin.infradead.org summary: Content analysis details: (-1.9 points) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at http://www.dnswl.org/, no trust [213.199.154.189 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, matthieu.castet@parrot.com, 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 the @ecc_info in the nand_flash_dev{}. The lower 16 bits are used to store the ECC bits, while the upper 16 bits are used to store the ECC data chunk size. Signed-off-by: Huang Shijie --- include/linux/mtd/nand.h | 10 ++++++++++ 1 files changed, 10 insertions(+), 0 deletions(-) diff --git a/include/linux/mtd/nand.h b/include/linux/mtd/nand.h index 2c5a2e0..2837bc6 100644 --- a/include/linux/mtd/nand.h +++ b/include/linux/mtd/nand.h @@ -633,6 +633,11 @@ struct nand_chip { * @options: stores various chip bit options * @id_len: The valid length of the @id. * @oobsize: OOB size + * @ecc_info: The ECC information. + * lower 16 bits: store the ECC bits. + * upper 16 bits: store the ECC data chunk size. + * For example, the "4bit ECC for each 512Byte" can be set with + * ECC_INFO(4, 512) macro. */ struct nand_flash_dev { char *name; @@ -649,6 +654,11 @@ struct nand_flash_dev { unsigned int options; uint16_t id_len; uint16_t oobsize; + +#define ECC_INFO(strength, size) (((strength) << 16) | (size)) +#define ECC_STRENGTH(x) (((x) >> 16) & 0xffff) +#define ECC_SIZE(x) ((x) & 0xffff) + uint32_t ecc_info; }; /**