From patchwork Mon Dec 2 09:20:26 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Huang Shijie X-Patchwork-Id: 295849 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from casper.infradead.org (unknown [IPv6:2001:770:15f::2]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by ozlabs.org (Postfix) with ESMTPS id 13CFE2C0098 for ; Mon, 2 Dec 2013 20:47:16 +1100 (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 1VnQ5l-00021k-0V; Mon, 02 Dec 2013 09:47:01 +0000 Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1VnQ5j-0008AM-Cm; Mon, 02 Dec 2013 09:46:59 +0000 Received: from co9ehsobe001.messaging.microsoft.com ([207.46.163.24] helo=co9outboundpool.messaging.microsoft.com) by merlin.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1VnQ5f-00089I-Ss for linux-mtd@lists.infradead.org; Mon, 02 Dec 2013 09:46:57 +0000 Received: from mail153-co9-R.bigfish.com (10.236.132.238) by CO9EHSOBE021.bigfish.com (10.236.130.84) with Microsoft SMTP Server id 14.1.225.22; Mon, 2 Dec 2013 09:46:28 +0000 Received: from mail153-co9 (localhost [127.0.0.1]) by mail153-co9-R.bigfish.com (Postfix) with ESMTP id 34EB03600A9; Mon, 2 Dec 2013 09:46:28 +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: 3 X-BigFish: VS3(zzzz1f42h2148h208ch1ee6h1de0h1fdah2073h2146h1202h1e76h1d1ah1d2ah1fc6h1082kzz1de098h8275bh1de097hz2dh2a8h839hd24he5bhf0ah1288h12a5h12a9h12bdh12e5h137ah139eh13b6h1441h1504h1537h162dh1631h1758h1898h18e1h1946h19b5h1ad9h1b0ah1b2fh2222h224fh1fb3h1d0ch1d2eh1d3fh1dfeh1dffh1e23h1fe8h1ff5h2218h2216h226dh22d0h2327h2336h1155h) Received: from mail153-co9 (localhost.localdomain [127.0.0.1]) by mail153-co9 (MessageSwitch) id 1385977585931921_19303; Mon, 2 Dec 2013 09:46:25 +0000 (UTC) Received: from CO9EHSMHS017.bigfish.com (unknown [10.236.132.241]) by mail153-co9.bigfish.com (Postfix) with ESMTP id DEE1780233; Mon, 2 Dec 2013 09:46:25 +0000 (UTC) Received: from mail.freescale.net (70.37.183.190) by CO9EHSMHS017.bigfish.com (10.236.130.27) with Microsoft SMTP Server (TLS) id 14.16.227.3; Mon, 2 Dec 2013 09:46:25 +0000 Received: from az84smr01.freescale.net (10.64.34.197) by 039-SN1MMR1-003.039d.mgd.msft.net (10.84.1.16) with Microsoft SMTP Server (TLS) id 14.3.158.2; Mon, 2 Dec 2013 09:46:24 +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 rB29kMbb022267; Mon, 2 Dec 2013 02:46:22 -0700 From: Huang Shijie To: Subject: [PATCH] mtd: nand: parse out the datasheet's required minimum ECC for Hynix(>=26nm) Date: Mon, 2 Dec 2013 17:20:26 +0800 Message-ID: <1385976026-31606-1-git-send-email-b32955@freescale.com> X-Mailer: git-send-email 1.7.2.rc3 In-Reply-To: <1385974906-29891-1-git-send-email-b32955@freescale.com> References: <1385974906-29891-1-git-send-email-b32955@freescale.com> MIME-Version: 1.0 X-OriginatorOrg: freescale.com X-FOPE-CONNECTOR: Id%0$Dn%*$RO%0$TLS%0$FQDN%$TlsDn% X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20131202_044656_092694_72763B02 X-CRM114-Status: GOOD ( 10.99 ) X-Spam-Score: -4.2 (----) X-Spam-Report: SpamAssassin version 3.3.2 on merlin.infradead.org summary: Content analysis details: (-4.2 points) pts rule name description ---- ---------------------- -------------------------------------------------- -2.3 RCVD_IN_DNSWL_MED RBL: Sender listed at http://www.dnswl.org/, medium trust [207.46.163.24 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, 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 Parse out the datasheet's required minimum ECC for Hynix nand chips which use the >=26 technology and the id length is 6. Referencd to the H27UBG8T2B. Signed-off-by: Huang Shijie --- drivers/mtd/nand/nand_base.c | 20 ++++++++++++++++++++ 1 files changed, 20 insertions(+), 0 deletions(-) diff --git a/drivers/mtd/nand/nand_base.c b/drivers/mtd/nand/nand_base.c index 4dab696..5c1ffd0 100644 --- a/drivers/mtd/nand/nand_base.c +++ b/drivers/mtd/nand/nand_base.c @@ -3201,6 +3201,26 @@ static void nand_decode_ext_id(struct mtd_info *mtd, struct nand_chip *chip, mtd->erasesize = 768 * 1024; else mtd->erasesize = (64 * 1024) << tmp; + + /* ecc info */ + tmp = (id_data[4] >> 4) & 0x7; + + if (tmp <= 4) { + if (tmp == 0) + chip->ecc_strength_ds = 0; + else + chip->ecc_strength_ds = 1 << (tmp - 1); + chip->ecc_step_ds = 512; + } else { + chip->ecc_step_ds = 1024; + if (tmp == 5) + chip->ecc_strength_ds = 24; + else if (tmp == 6) + chip->ecc_strength_ds = 32; + else /* (tmp == 7) */ + chip->ecc_strength_ds = 40; + } + *busw = 0; } else if (id_len == 6 && id_data[0] == NAND_MFR_HYNIX && !nand_is_slc(chip) && (id_data[5] & 0x7) > 3) {