linux-kernel - [PATCH 06/13] mtd/docg3: add OOB layout to mtdinfo

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Message-Id: <1319824292-11085-7-git-send-email-robert.jarzmik@free.fr>
Date:	Fri, 28 Oct 2011 19:51:25 +0200
From:	Robert Jarzmik <robert.jarzmik@...e.fr>
To:	dwmw2@...radead.org, dedekind1@...il.com, mikedunn@...sguy.com
Cc:	linux-mtd@...ts.infradead.org, linux-kernel@...r.kernel.org,
	Robert Jarzmik <robert.jarzmik@...e.fr>
Subject: [PATCH 06/13] mtd/docg3: add OOB layout to mtdinfo

Add OOB layout description for docg3, so that userspace can
use this information to setup the data for write_oob().

Signed-off-by: Robert Jarzmik <robert.jarzmik@...e.fr>
---
 drivers/mtd/devices/docg3.c |   13 +++++++++++++
 1 files changed, 13 insertions(+), 0 deletions(-)

diff --git a/drivers/mtd/devices/docg3.c b/drivers/mtd/devices/docg3.c
index 709d886..26fc135 100644
--- a/drivers/mtd/devices/docg3.c
+++ b/drivers/mtd/devices/docg3.c
@@ -63,6 +63,18 @@
  *
  */
 
+/**
+ * struct docg3_oobinfo - DiskOnChip G3 OOB layout
+ * @eccbytes: 8 bytes are used (1 for Hamming ECC, 7 for BCH ECC)
+ * @eccpos: ecc positions (byte 7 is Hamming ECC, byte 8-14 are BCH ECC)
+ * @oobfree: free pageinfo bytes (byte 0 until byte 6, byte 15
+ */
+static struct nand_ecclayout docg3_oobinfo = {
+	.eccbytes = 8,
+	.eccpos = {7, 8, 9, 10, 11, 12, 13, 14},
+	.oobfree = {{0, 7}, {15, 1} }
+};
+
 static inline u8 doc_readb(struct docg3 *docg3, u16 reg)
 {
 	u8 val = readb(docg3->base + reg);
@@ -977,6 +989,7 @@ static void __init doc_set_driver_info(int chip_id, struct mtd_info *mtd)
 	mtd->write_oob = NULL;
 	mtd->sync = NULL;
 	mtd->block_isbad = doc_block_isbad;
+	mtd->ecclayout = &docg3_oobinfo;
 }
 
 /**
-- 
1.7.5.4

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