From patchwork Tue Apr 23 08:54:54 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Huang Shijie X-Patchwork-Id: 238816 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 4DBA62C0137 for ; Tue, 23 Apr 2013 19:08:47 +1000 (EST) Received: from merlin.infradead.org ([205.233.59.134]) by casper.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1UUZBp-00081E-04; Tue, 23 Apr 2013 09:07:06 +0000 Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1UUZBQ-0003dP-Va; Tue, 23 Apr 2013 09:06:40 +0000 Received: from ch1ehsobe002.messaging.microsoft.com ([216.32.181.182] helo=ch1outboundpool.messaging.microsoft.com) by merlin.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1UUZB8-0003Yj-MC for linux-mtd@lists.infradead.org; Tue, 23 Apr 2013 09:06:26 +0000 Received: from mail76-ch1-R.bigfish.com (10.43.68.250) by CH1EHSOBE011.bigfish.com (10.43.70.61) with Microsoft SMTP Server id 14.1.225.23; Tue, 23 Apr 2013 09:06:21 +0000 Received: from mail76-ch1 (localhost [127.0.0.1]) by mail76-ch1-R.bigfish.com (Postfix) with ESMTP id 6B5022A0143; Tue, 23 Apr 2013 09:06:21 +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(z3121kzzz1f42h1fc6h1ee6h1de0h1fdah1202h1e76h1d1ah1d2ah1082kzz8275bhz2dh2a8h668h839hd24he5bhf0ah1288h12a5h12a9h12bdh12e5h137ah139eh13b6h1441h1504h1537h162dh1631h1758h1898h18e1h1946h19b5h1ad9h1b0ah1155h) Received: from mail76-ch1 (localhost.localdomain [127.0.0.1]) by mail76-ch1 (MessageSwitch) id 1366707979676566_31104; Tue, 23 Apr 2013 09:06:19 +0000 (UTC) Received: from CH1EHSMHS027.bigfish.com (snatpool3.int.messaging.microsoft.com [10.43.68.227]) by mail76-ch1.bigfish.com (Postfix) with ESMTP id A2AEC2E008D; Tue, 23 Apr 2013 09:06:19 +0000 (UTC) Received: from mail.freescale.net (70.37.183.190) by CH1EHSMHS027.bigfish.com (10.43.70.27) with Microsoft SMTP Server (TLS) id 14.1.225.23; Tue, 23 Apr 2013 09:06:18 +0000 Received: from az84smr01.freescale.net (10.64.34.197) by 039-SN1MMR1-001.039d.mgd.msft.net (10.84.1.13) with Microsoft SMTP Server (TLS) id 14.2.328.11; Tue, 23 Apr 2013 09:06:17 +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 r3N95vxY004555; Tue, 23 Apr 2013 02:06:15 -0700 From: Huang Shijie To: Subject: [PATCH V3 6/9] mtd: add a new field for ecc info in the nand_flash_dev{} Date: Tue, 23 Apr 2013 16:54:54 +0800 Message-ID: <1366707297-31309-7-git-send-email-b32955@freescale.com> X-Mailer: git-send-email 1.7.1 In-Reply-To: <1366707297-31309-1-git-send-email-b32955@freescale.com> References: <1366707297-31309-1-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-20130423_050622_839597_B7AB648B X-CRM114-Status: GOOD ( 10.17 ) 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 [216.32.181.182 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 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 063e517..f4c7777 100644 --- a/include/linux/mtd/nand.h +++ b/include/linux/mtd/nand.h @@ -624,6 +624,10 @@ struct nand_chip { { .name = (nm), {{ .dev_id = (devid) }}, .chipsize = (chipsz), \ .options = (opts) } +#define NAND_ECC_INFO(strength, size) (((strength) << 16) | (size)) +#define NAND_ECC_STRENGTH(x) (((x) >> 16) & 0xffff) +#define NAND_ECC_SIZE(x) ((x) & 0xffff) + /** * struct nand_flash_dev - NAND Flash Device ID Structure * @name: a human-readable name of the NAND chip @@ -641,6 +645,11 @@ 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 + * NAND_ECC_INFO(4, 512) macro. */ struct nand_flash_dev { char *name; @@ -657,6 +666,7 @@ struct nand_flash_dev { unsigned int options; uint16_t id_len; uint16_t oobsize; + uint32_t ecc_info; }; /**