From: Sylvain Lemieux slemieux@tycoint.com
Incorporate ECC layout for small page NAND from legacy LPCLinux NXP BSP. The code taken from the legacy patch is: - lpc32xx SLC NAND driver (ECC layout for small page)
This layout is matching the lpc32xx NAND SLC Kernel driver: https://git.kernel.org/cgit/linux/kernel/git/stable/linux-stable.git/tree/dr...
Signed-off-by: Sylvain Lemieux slemieux@tycoint.com --- Changes from v3 to v4: * No changes.
Changes from v2 to v3: * No changes; patch context updated.
Changes from v1 to v2: * Move ECC layout for small page NAND into a separate patch.
The legacy BSP patch (u-boot-2009.03_lpc32x0-v1.07.patch.tar.bz2) was downloaded from the LPCLinux Web site.
drivers/mtd/nand/lpc32xx_nand_slc.c | 16 ++++++++++++++++ 1 file changed, 16 insertions(+)
diff --git a/drivers/mtd/nand/lpc32xx_nand_slc.c b/drivers/mtd/nand/lpc32xx_nand_slc.c index 4794cc2..fffc8a4 100644 --- a/drivers/mtd/nand/lpc32xx_nand_slc.c +++ b/drivers/mtd/nand/lpc32xx_nand_slc.c @@ -116,6 +116,19 @@ struct lpc32xx_nand_slc_regs { #define NAND_LARGE_BLOCK_PAGE_SIZE 2048 #define NAND_SMALL_BLOCK_PAGE_SIZE 512
+/* NAND ECC Layout for small page NAND devices + * Note: For large page devices, the default layouts are used. */ +static struct nand_ecclayout lpc32xx_nand_oob_16 = { + .eccbytes = 6, + .eccpos = {10, 11, 12, 13, 14, 15}, + .oobfree = { + {.offset = 0, + . length = 4}, + {.offset = 6, + . length = 4} + } +}; + #if defined(CONFIG_DMA_LPC32XX) /* DMA Descriptors * For Large Block: 17 descriptors = ((16 Data and ECC Read) + 1 Spare Area) @@ -524,6 +537,9 @@ int board_nand_init(struct nand_chip *lpc32xx_chip) lpc32xx_chip->ecc.strength = 1; #endif
+ if (CONFIG_SYS_NAND_ECCSIZE != NAND_LARGE_BLOCK_PAGE_SIZE) + lpc32xx_chip->ecc.layout = &lpc32xx_nand_oob_16; + #if defined(CONFIG_SYS_NAND_USE_FLASH_BBT) lpc32xx_chip->bbt_options |= NAND_BBT_USE_FLASH; #endif