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nand: lpc32xx: add ECC layout for small page NAND

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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 <slemieux@tycoint.com>
This commit is contained in:
Sylvain Lemieux 2015-08-13 15:40:21 -04:00 committed by Tom Rini
parent 5f63bf3ec8
commit 30cb3bf4a9
1 changed files with 17 additions and 1 deletions
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18
drivers/mtd/nand/lpc32xx_nand_slc.c
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@ -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