diff options
Diffstat (limited to 'recipes/linux/linux-2.6.31/pcm043/fix_oob_layout.diff')
| -rw-r--r-- | recipes/linux/linux-2.6.31/pcm043/fix_oob_layout.diff | 67 |
1 files changed, 67 insertions, 0 deletions
diff --git a/recipes/linux/linux-2.6.31/pcm043/fix_oob_layout.diff b/recipes/linux/linux-2.6.31/pcm043/fix_oob_layout.diff new file mode 100644 index 0000000000..d8e1b1d22f --- /dev/null +++ b/recipes/linux/linux-2.6.31/pcm043/fix_oob_layout.diff @@ -0,0 +1,67 @@ +--- + drivers/mtd/nand/mxc_nand_v2.c | 24 +++++++++++++++++++++--- + 1 file changed, 21 insertions(+), 3 deletions(-) + +Index: drivers/mtd/nand/mxc_nand_v2.c +=================================================================== +--- drivers/mtd/nand/mxc_nand_v2.c.orig ++++ drivers/mtd/nand/mxc_nand_v2.c +@@ -1,6 +1,7 @@ + /* + * Copyright 2004-2008 Freescale Semiconductor, Inc. All Rights Reserved. + * Copyright 2009 Sascha Hauer, kernel@pengutronix.de ++ * Copyright 2009 Juergen Beisert, kernel@pengutronix.de + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License +@@ -130,6 +131,19 @@ struct mxc_nand_host { + * User ECC + * + * For pages larger than 512 bytes, n structures of this type will be used. ++ * ++ * Bad block detection: ++ * As long we do not overwrite the badblock_pattern structure member, the ++ * framework will use the description 'smallpage_flashbased' in file ++ * nand_bbt.c for page sizes with 512 bytes and description ++ * 'largepage_flashbased' in the same file for page sizes larger than ++ * 512 bytes. ++ * ++ * 'smallpage_flashbased' describes the bad block marker in the byte at offset ++ * five, 'largepage_flashbased' describes theses markers at offset 0 and 1 ++ * in the OOB. ++ * ++ * So, we must keep these bytes free for bad block marker usage. + */ + + /* OOB description for 512 byte pages with 16 byte OOB */ +@@ -139,7 +153,9 @@ static struct nand_ecclayout nand_hw_ecc + 7, 8, 9, 10, 11, 12, 13, 14, 15 + }, + .oobfree = { +- {.offset = 0, .length = 7} ++ {.offset = 0, .length = 5}, ++ /* keep offset 5 free for bad block marker usage */ ++ {.offset = 6, .length = 1} + } + }; + +@@ -153,7 +169,8 @@ static struct nand_ecclayout nand_hw_ecc + 55, 56, 57, 58, 59, 60, 61, 62, 63 + }, + .oobfree = { +- {.offset = 0, .length = 7}, ++ /* keep offset 0,1 free for bad block marker usage */ ++ {.offset = 2, .length = 5}, + {.offset = 16, .length = 7}, + {.offset = 32, .length = 7}, + {.offset = 48, .length = 7} +@@ -175,7 +192,8 @@ static struct nand_ecclayout nand_hw_ecc + /* 119, 120, 121, 122, 123, 124, 125, 126, 127 */ + }, + .oobfree = { +- {.offset = 0, .length = 7}, ++ /* keep offset 0,1 free for bad block marker usage */ ++ {.offset = 2, .length = 5}, + {.offset = 16, .length = 7}, + {.offset = 32, .length = 7}, + {.offset = 48, .length = 7}, |