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@free.fr>
Reviewed-by: Ivan Djelic <ivan.djelic@parrot.com>
Reviewed-by: Mike Dunn <mikedunn@newsguy.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>

diff --git a/drivers/mtd/devices/docg3.c b/drivers/mtd/devices/docg3.c
index 6eca7f6c072c20ccf897845b2ae07625e659154c..27c4feae132f061fea1916a7a489f01517b18047 100644 (file)
--- a/drivers/mtd/devices/docg3.c
+++ b/drivers/mtd/devices/docg3.c
@@ -63,6 +63,20 @@
  *
  */
 
+/**
+ * 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
+ * @oobavail: 8 available bytes remaining after ECC toll
+ */
+static struct nand_ecclayout docg3_oobinfo = {
+       .eccbytes = 8,
+       .eccpos = {7, 8, 9, 10, 11, 12, 13, 14},
+       .oobfree = {{0, 7}, {15, 1} },
+       .oobavail = 8,
+};
+
 static inline u8 doc_readb(struct docg3 *docg3, u16 reg)
 {
        u8 val = readb(docg3->base + reg);
@@ -973,6 +987,7 @@ 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;
 }
 
 /**