diff options
Diffstat (limited to 'recipes/linux/linux-2.6.31/pcm043/0007-MXC-NFC-Fix-OOB-layout.patch')
| -rw-r--r-- | recipes/linux/linux-2.6.31/pcm043/0007-MXC-NFC-Fix-OOB-layout.patch | 104 |
1 files changed, 104 insertions, 0 deletions
diff --git a/recipes/linux/linux-2.6.31/pcm043/0007-MXC-NFC-Fix-OOB-layout.patch b/recipes/linux/linux-2.6.31/pcm043/0007-MXC-NFC-Fix-OOB-layout.patch new file mode 100644 index 0000000000..0aa5cc63dc --- /dev/null +++ b/recipes/linux/linux-2.6.31/pcm043/0007-MXC-NFC-Fix-OOB-layout.patch @@ -0,0 +1,104 @@ +From 1b05f0fbf96df288d1ee6d0bf4175e99b7d04730 Mon Sep 17 00:00:00 2001 +From: Juergen Beisert <j.beisert@pengutronix.de> +Date: Tue, 29 Sep 2009 15:28:21 +0200 +Subject: [PATCH 07/15] MXC NFC: Fix OOB layout + +This data is not from the datasheet because the datasheet conceals these +facts. Its collected from other sources and some hints from the datasheet. +Hope its documentation is useful. + +Signed-off-by: Juergen Beisert <j.beisert@pengutronix.de> +--- + drivers/mtd/nand/mxc_nand_v2.c | 68 ++++++++++++++++++++++++++++++++------- + 1 files changed, 55 insertions(+), 13 deletions(-) + +diff --git a/drivers/mtd/nand/mxc_nand_v2.c b/drivers/mtd/nand/mxc_nand_v2.c +index 3b1011c..c1cbb05 100644 +--- a/drivers/mtd/nand/mxc_nand_v2.c ++++ b/drivers/mtd/nand/mxc_nand_v2.c +@@ -121,27 +121,69 @@ struct mxc_nand_host { + #define TROP_US_DELAY 2000 + + /* +- * OOB placement block for use with hardware ecc generation ++ * ECC data seems organized in 16 byte planes in this hardware. ++ * 7 bytes can be used for user's purpose, and 9 bytes are used ++ * for the ECC sum. ++ * ++ * 0 1 2 3 4 5 6 7 8 9 A B C D E F ++ * |<----------->|<------------->| ++ * User ECC ++ * ++ * For pages larger than 512 bytes, n structures of this type will be used. + */ ++ ++/* OOB description for 512 byte pages with 16 byte OOB */ + static struct nand_ecclayout nand_hw_eccoob_512 = { +- .eccbytes = 9, +- .eccpos = {7, 8, 9, 10, 11, 12, 13, 14, 15}, +- .oobavail = 4, +- .oobfree = {{0, 4}} ++ .eccbytes = 1 * 9, ++ .eccpos = { ++ 7, 8, 9, 10, 11, 12, 13, 14, 15 ++ }, ++ .oobfree = { ++ {.offset = 0, .length = 7} ++ } + }; + ++/* OOB description for 2048 byte pages with 64 byte OOB */ + static struct nand_ecclayout nand_hw_eccoob_2k = { +- .eccbytes = 9, +- .eccpos = {7, 8, 9, 10, 11, 12, 13, 14, 15}, +- .oobavail = 4, +- .oobfree = {{2, 4}} ++ .eccbytes = 4 * 9, ++ .eccpos = { ++ 7, 8, 9, 10, 11, 12, 13, 14, 15, ++ 23, 24, 25, 26, 27, 28, 29, 30, 31, ++ 39, 40, 41, 42, 43, 44, 45, 46, 47, ++ 55, 56, 57, 58, 59, 60, 61, 62, 63 ++ }, ++ .oobfree = { ++ {.offset = 0, .length = 7}, ++ {.offset = 16, .length = 7}, ++ {.offset = 32, .length = 7}, ++ {.offset = 48, .length = 7} ++ } + }; + ++/* OOB description for 4096 byte pages with 128 byte OOB */ + static struct nand_ecclayout nand_hw_eccoob_4k = { +- .eccbytes = 9, +- .eccpos = {7, 8, 9, 10, 11, 12, 13, 14, 15}, +- .oobavail = 4, +- .oobfree = {{2, 4}} ++ .eccbytes = 8 * 9, ++ .eccpos = { ++ 7, 8, 9, 10, 11, 12, 13, 14, 15, ++ 23, 24, 25, 26, 27, 28, 29, 30, 31, ++ 39, 40, 41, 42, 43, 44, 45, 46, 47, ++ 55, 56, 57, 58, 59, 60, 61, 62, 63, ++ 71, 72, 73, 74, 75, 76, 77, 78, 79, ++ 87, 88, 89, 90, 91, 92, 93, 94, 95, ++ 103, 104, 105, 106, 107, 108, 109, 110, 111, ++/* ouch, only 64 entries allowed */ ++/* 119, 120, 121, 122, 123, 124, 125, 126, 127 */ ++ }, ++ .oobfree = { ++ {.offset = 0, .length = 7}, ++ {.offset = 16, .length = 7}, ++ {.offset = 32, .length = 7}, ++ {.offset = 48, .length = 7}, ++ {.offset = 64, .length = 7}, ++ {.offset = 80, .length = 7}, ++ {.offset = 96, .length = 7}, ++ {.offset = 112, .length = 7} ++ } + }; + + #ifdef CONFIG_MTD_PARTITIONS +-- +1.6.1 + |