From 30cb3bf4a961dcd59a8f72f714e900cbfe7991dd Mon Sep 17 00:00:00 2001 From: Sylvain Lemieux Date: Thu, 13 Aug 2015 15:40:21 -0400 Subject: [PATCH] nand: lpc32xx: add ECC layout for small page NAND 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 Linux Kernel driver. Signed-off-by: Sylvain Lemieux --- drivers/mtd/nand/lpc32xx_nand_slc.c | 18 +++++++++++++++++- 1 file changed, 17 insertions(+), 1 deletion(-) diff --git a/drivers/mtd/nand/lpc32xx_nand_slc.c b/drivers/mtd/nand/lpc32xx_nand_slc.c index dbb95d9326..2e5f139606 100644 --- a/drivers/mtd/nand/lpc32xx_nand_slc.c +++ b/drivers/mtd/nand/lpc32xx_nand_slc.c @@ -75,6 +75,19 @@ struct lpc32xx_nand_slc_regs { #define TAC_R_HOLD(n) (max_t(uint32_t, (n), 0xF) << 4) #define TAC_R_SETUP(n) (max_t(uint32_t, (n), 0xF) << 0) +/* 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) #define ECCSTEPS (CONFIG_SYS_NAND_PAGE_SIZE / CONFIG_SYS_NAND_ECCSIZE) @@ -563,13 +576,16 @@ int board_nand_init(struct nand_chip *lpc32xx_chip) #endif /* - * Use default ECC layout, but these values are predefined + * These values are predefined * for both small and large page NAND flash devices. */ lpc32xx_chip->ecc.size = CONFIG_SYS_NAND_ECCSIZE; lpc32xx_chip->ecc.bytes = CONFIG_SYS_NAND_ECCBYTES; lpc32xx_chip->ecc.strength = 1; + if (CONFIG_SYS_NAND_PAGE_SIZE != 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 -- 2.39.5