[PATCH 02/18] mtd/fsmc_nand: ECC1 & ECC4 layout separated for different page sizes
Vipin Kumar
vipin.kumar at st.com
Wed Mar 7 06:30:50 EST 2012
From: Bhavna Yadav <bhavna.yadav at st.com>
ECC1 & ECC4 layout for NAND of different pages sizes for e.g. 512bytes, 2K, 4K
and 8K are separated. Previously there existed one ECC4 layout for 2K & 4K page
size due to which oob test module available in drivers/mtd/nand/test was failing
Signed-off-by: Bhavna Yadav <bhavna.yadav at st.com>
---
drivers/mtd/nand/fsmc_nand.c | 176 ++++++++++++++++++++++++++++++++++++++----
1 files changed, 159 insertions(+), 17 deletions(-)
diff --git a/drivers/mtd/nand/fsmc_nand.c b/drivers/mtd/nand/fsmc_nand.c
index 9c7d9d8..abbff77 100644
--- a/drivers/mtd/nand/fsmc_nand.c
+++ b/drivers/mtd/nand/fsmc_nand.c
@@ -34,7 +34,7 @@
#include <linux/amba/bus.h>
#include <mtd/mtd-abi.h>
-static struct nand_ecclayout fsmc_ecc1_layout = {
+static struct nand_ecclayout fsmc_ecc1_128_layout = {
.eccbytes = 24,
.eccpos = {2, 3, 4, 18, 19, 20, 34, 35, 36, 50, 51, 52,
66, 67, 68, 82, 83, 84, 98, 99, 100, 114, 115, 116},
@@ -50,7 +50,91 @@ static struct nand_ecclayout fsmc_ecc1_layout = {
}
};
-static struct nand_ecclayout fsmc_ecc4_lp_layout = {
+static struct nand_ecclayout fsmc_ecc1_64_layout = {
+ .eccbytes = 12,
+ .eccpos = {2, 3, 4, 18, 19, 20, 34, 35, 36, 50, 51, 52},
+ .oobfree = {
+ {.offset = 8, .length = 8},
+ {.offset = 24, .length = 8},
+ {.offset = 40, .length = 8},
+ {.offset = 56, .length = 8},
+ }
+};
+
+static struct nand_ecclayout fsmc_ecc1_16_layout = {
+ .eccbytes = 3,
+ .eccpos = {2, 3, 4},
+ .oobfree = {
+ {.offset = 8, .length = 8},
+ }
+};
+
+/*
+ * ECC4 layout for NAND of pagesize 8192 bytes & OOBsize 256 bytes. 13*16 bytes
+ * of OB size is reserved for ECC, Byte no. 0 & 1 reserved for bad block and 46
+ * bytes are free for use.
+ */
+static struct nand_ecclayout fsmc_ecc4_256_layout = {
+ .eccbytes = 208,
+ .eccpos = { 2, 3, 4, 5, 6, 7, 8,
+ 9, 10, 11, 12, 13, 14,
+ 18, 19, 20, 21, 22, 23, 24,
+ 25, 26, 27, 28, 29, 30,
+ 34, 35, 36, 37, 38, 39, 40,
+ 41, 42, 43, 44, 45, 46,
+ 50, 51, 52, 53, 54, 55, 56,
+ 57, 58, 59, 60, 61, 62,
+ 66, 67, 68, 69, 70, 71, 72,
+ 73, 74, 75, 76, 77, 78,
+ 82, 83, 84, 85, 86, 87, 88,
+ 89, 90, 91, 92, 93, 94,
+ 98, 99, 100, 101, 102, 103, 104,
+ 105, 106, 107, 108, 109, 110,
+ 114, 115, 116, 117, 118, 119, 120,
+ 121, 122, 123, 124, 125, 126,
+ 130, 131, 132, 133, 134, 135, 136,
+ 137, 138, 139, 140, 141, 142,
+ 146, 147, 148, 149, 150, 151, 152,
+ 153, 154, 155, 156, 157, 158,
+ 162, 163, 164, 165, 166, 167, 168,
+ 169, 170, 171, 172, 173, 174,
+ 178, 179, 180, 181, 182, 183, 184,
+ 185, 186, 187, 188, 189, 190,
+ 194, 195, 196, 197, 198, 199, 200,
+ 201, 202, 203, 204, 205, 206,
+ 210, 211, 212, 213, 214, 215, 216,
+ 217, 218, 219, 220, 221, 222,
+ 226, 227, 228, 229, 230, 231, 232,
+ 233, 234, 235, 236, 237, 238,
+ 242, 243, 244, 245, 246, 247, 248,
+ 249, 250, 251, 252, 253, 254
+ },
+ .oobfree = {
+ {.offset = 15, .length = 3},
+ {.offset = 31, .length = 3},
+ {.offset = 47, .length = 3},
+ {.offset = 63, .length = 3},
+ {.offset = 79, .length = 3},
+ {.offset = 95, .length = 3},
+ {.offset = 111, .length = 3},
+ {.offset = 127, .length = 3},
+ {.offset = 143, .length = 3},
+ {.offset = 159, .length = 3},
+ {.offset = 175, .length = 3},
+ {.offset = 191, .length = 3},
+ {.offset = 207, .length = 3},
+ {.offset = 223, .length = 3},
+ {.offset = 239, .length = 3},
+ {.offset = 255, .length = 1}
+ }
+};
+
+/*
+ * ECC4 layout for NAND of pagesize 4096 bytes & OOBsize 128 bytes. 13*8 bytes
+ * of OOB size is reserved for ECC, Byte no. 0 & 1 reserved for bad block & 22
+ * bytes are free for use.
+ */
+static struct nand_ecclayout fsmc_ecc4_128_layout = {
.eccbytes = 104,
.eccpos = { 2, 3, 4, 5, 6, 7, 8,
9, 10, 11, 12, 13, 14,
@@ -82,6 +166,45 @@ static struct nand_ecclayout fsmc_ecc4_lp_layout = {
};
/*
+ * ECC4 layout for NAND of pagesize 2048 bytes & OOBsize 64 bytes. 13*4 bytes of
+ * OOB size is reserved for ECC, Byte no. 0 & 1 reserved for bad block and 10
+ * bytes are free for use.
+ */
+static struct nand_ecclayout fsmc_ecc4_64_layout = {
+ .eccbytes = 52,
+ .eccpos = { 2, 3, 4, 5, 6, 7, 8,
+ 9, 10, 11, 12, 13, 14,
+ 18, 19, 20, 21, 22, 23, 24,
+ 25, 26, 27, 28, 29, 30,
+ 34, 35, 36, 37, 38, 39, 40,
+ 41, 42, 43, 44, 45, 46,
+ 50, 51, 52, 53, 54, 55, 56,
+ 57, 58, 59, 60, 61, 62,
+ },
+ .oobfree = {
+ {.offset = 15, .length = 3},
+ {.offset = 31, .length = 3},
+ {.offset = 47, .length = 3},
+ {.offset = 63, .length = 1},
+ }
+};
+
+/*
+ * ECC4 layout for NAND of pagesize 512 bytes & OOBsize 16 bytes. 13 bytes of
+ * OOB size is reserved for ECC, Byte no. 4 & 5 reserved for bad block and One
+ * byte is free for use.
+ */
+static struct nand_ecclayout fsmc_ecc4_16_layout = {
+ .eccbytes = 13,
+ .eccpos = { 0, 1, 2, 3, 6, 7, 8,
+ 9, 10, 11, 12, 13, 14
+ },
+ .oobfree = {
+ {.offset = 15, .length = 1},
+ }
+};
+
+/*
* ECC placement definitions in oobfree type format.
* There are 13 bytes of ecc for every 512 byte block and it has to be read
* consecutively and immediately after the 512 byte data block for hardware to
@@ -103,16 +226,6 @@ static struct fsmc_eccplace fsmc_ecc4_lp_place = {
}
};
-static struct nand_ecclayout fsmc_ecc4_sp_layout = {
- .eccbytes = 13,
- .eccpos = { 0, 1, 2, 3, 6, 7, 8,
- 9, 10, 11, 12, 13, 14
- },
- .oobfree = {
- {.offset = 15, .length = 1},
- }
-};
-
static struct fsmc_eccplace fsmc_ecc4_sp_place = {
.eccplace = {
{.offset = 0, .length = 4},
@@ -733,15 +846,44 @@ static int __init fsmc_nand_probe(struct platform_device *pdev)
}
if (AMBA_REV_BITS(host->pid) >= 8) {
- if (host->mtd.writesize == 512) {
- nand->ecc.layout = &fsmc_ecc4_sp_layout;
+ switch (host->mtd.oobsize) {
+ case 16:
+ nand->ecc.layout = &fsmc_ecc4_16_layout;
host->ecc_place = &fsmc_ecc4_sp_place;
- } else {
- nand->ecc.layout = &fsmc_ecc4_lp_layout;
+ break;
+ case 64:
+ nand->ecc.layout = &fsmc_ecc4_64_layout;
+ host->ecc_place = &fsmc_ecc4_lp_place;
+ break;
+ case 128:
+ nand->ecc.layout = &fsmc_ecc4_128_layout;
+ host->ecc_place = &fsmc_ecc4_lp_place;
+ break;
+ case 256:
+ nand->ecc.layout = &fsmc_ecc4_256_layout;
host->ecc_place = &fsmc_ecc4_lp_place;
+ break;
+ default:
+ printk(KERN_WARNING "No oob scheme defined for "
+ "oobsize %d\n", mtd->oobsize);
+ BUG();
}
} else {
- nand->ecc.layout = &fsmc_ecc1_layout;
+ switch (host->mtd.oobsize) {
+ case 16:
+ nand->ecc.layout = &fsmc_ecc1_16_layout;
+ break;
+ case 64:
+ nand->ecc.layout = &fsmc_ecc1_64_layout;
+ break;
+ case 128:
+ nand->ecc.layout = &fsmc_ecc1_128_layout;
+ break;
+ default:
+ printk(KERN_WARNING "No oob scheme defined for "
+ "oobsize %d\n", mtd->oobsize);
+ BUG();
+ }
}
/* Second stage of scan to fill MTD data-structures */
--
1.7.0.4
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