From patchwork Wed Jun 10 09:02:18 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Murali Karicheri X-Patchwork-Id: 482560 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from bombadil.infradead.org (bombadil.infradead.org [IPv6:2001:1868:205::9]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id A8E5B1401AD for ; Wed, 10 Jun 2015 19:15:17 +1000 (AEST) Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1Z2c4p-00080L-G7; Wed, 10 Jun 2015 09:13:39 +0000 Received: from devils.ext.ti.com ([198.47.26.153]) by bombadil.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1Z2buG-0008Q8-GD; Wed, 10 Jun 2015 09:02:46 +0000 Received: from dlelxv90.itg.ti.com ([172.17.2.17]) by devils.ext.ti.com (8.13.7/8.13.7) with ESMTP id t5A92Jen018208; Wed, 10 Jun 2015 04:02:19 -0500 Received: from DFLE73.ent.ti.com (dfle73.ent.ti.com [128.247.5.110]) by dlelxv90.itg.ti.com (8.14.3/8.13.8) with ESMTP id t5A92Jfb002818; Wed, 10 Jun 2015 04:02:19 -0500 Received: from dlep33.itg.ti.com (157.170.170.75) by DFLE73.ent.ti.com (128.247.5.110) with Microsoft SMTP Server id 14.3.224.2; Wed, 10 Jun 2015 04:02:19 -0500 Received: from ula0868495.emea.dhcp.ti.com (ileax41-snat.itg.ti.com [10.172.224.153]) by dlep33.itg.ti.com (8.14.3/8.13.8) with ESMTP id t5A92HZk001469; Wed, 10 Jun 2015 04:02:18 -0500 From: Murali Karicheri To: , , , , Subject: [PATCH - v1] mtd: nand: davinci: add support for 4K page size nand devices. Date: Wed, 10 Jun 2015 05:02:18 -0400 Message-ID: <1433926938-14092-1-git-send-email-m-karicheri2@ti.com> X-Mailer: git-send-email 1.9.1 MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20150610_020244_688283_82EAFFDB X-CRM114-Status: GOOD ( 11.23 ) X-Spam-Score: -5.0 (-----) X-Spam-Report: SpamAssassin version 3.4.0 on bombadil.infradead.org summary: Content analysis details: (-5.0 points) pts rule name description ---- ---------------------- -------------------------------------------------- -5.0 RCVD_IN_DNSWL_HI RBL: Sender listed at http://www.dnswl.org/, high trust [198.47.26.153 listed in list.dnswl.org] -0.0 SPF_PASS SPF: sender matches SPF record -0.0 T_RP_MATCHES_RCVD Envelope sender domain matches handover relay domain Cc: Murali Karicheri , Hao Zhang X-BeenThere: linux-mtd@lists.infradead.org X-Mailman-Version: 2.1.18-1 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 K2L EVM uses NAND with 4K page size. This patch add support for ECC layout requires to enable Micron MT29F16G08ADBCAH4 NAND available on this EVM. Signed-off-by: Murali Karicheri Signed-off-by: Hao Zhang --- - v1 - Remove the comment as well from the code as now 4K page is supported drivers/mtd/nand/davinci_nand.c | 42 +++++++++++++++++++++++++++++------------ 1 file changed, 30 insertions(+), 12 deletions(-) diff --git a/drivers/mtd/nand/davinci_nand.c b/drivers/mtd/nand/davinci_nand.c index feb6d18..90b177b 100644 --- a/drivers/mtd/nand/davinci_nand.c +++ b/drivers/mtd/nand/davinci_nand.c @@ -520,6 +520,31 @@ static struct nand_ecclayout hwecc4_2048 = { }, }; +/* An ECC layout for using 4-bit ECC with large-page (4096bytes) flash, + * storing ten ECC bytes plus the manufacturer's bad block marker byte, + * and not overlapping the default BBT markers. + */ +static struct nand_ecclayout hwecc4_4096 = { + .eccbytes = 80, + .eccpos = { + /* at the end of spare sector */ + 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, + 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, + 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, + 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, + 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, + 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, + 108, 109, 110, 111, 112, 113, 114, 115, 116, 117, + 118, 119, 120, 121, 122, 123, 124, 125, 126, 127, + }, + .oobfree = { + /* 2 bytes at offset 0 hold manufacturer badblock markers */ + {.offset = 2, .length = 46, }, + /* 5 bytes at offset 8 hold BBT markers */ + /* 8 bytes at offset 16 hold JFFS2 clean markers */ + }, +}; + #if defined(CONFIG_OF) static const struct of_device_id davinci_nand_of_match[] = { {.compatible = "ti,davinci-nand", }, @@ -796,18 +821,11 @@ static int nand_davinci_probe(struct platform_device *pdev) info->chip.ecc.mode = NAND_ECC_HW_OOB_FIRST; goto syndrome_done; } - - /* 4KiB page chips are not yet supported. The eccpos from - * nand_ecclayout cannot hold 80 bytes and change to eccpos[] - * breaks userspace ioctl interface with mtd-utils. Once we - * resolve this issue, NAND_ECC_HW_OOB_FIRST mode can be used - * for the 4KiB page chips. - * - * TODO: Note that nand_ecclayout has now been expanded and can - * hold plenty of OOB entries. - */ - dev_warn(&pdev->dev, "no 4-bit ECC support yet " - "for 4KiB-page NAND\n"); + if (chunks == 8) { + info->ecclayout = hwecc4_4096; + info->chip.ecc.mode = NAND_ECC_HW_OOB_FIRST; + goto syndrome_done; + } ret = -EIO; goto err;