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imx: nand: Support flash based BBT 

Signed-off-by: Timo Ketola <timo@exertus.fi>
Acked-by: Scott Wood <scottwood@freescale.com>
This commit is contained in:
Timo Ketola 2012-04-18 22:55:31 +00:00 committed by Albert ARIBAUD
parent eba1868be4
commit a1028730b5
1 changed files with 33 additions and 0 deletions
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33
drivers/mtd/nand/mxc_nand.c
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@ -1302,12 +1302,45 @@ static void mxc_setup_config1(void)
#define mxc_setup_config1()
#endif
#ifdef CONFIG_SYS_NAND_USE_FLASH_BBT
static u8 bbt_pattern[] = {'B', 'b', 't', '0' };
static u8 mirror_pattern[] = {'1', 't', 'b', 'B' };
static struct nand_bbt_descr bbt_main_descr = {
.options = NAND_BBT_LASTBLOCK | NAND_BBT_CREATE | NAND_BBT_WRITE |
NAND_BBT_2BIT | NAND_BBT_VERSION | NAND_BBT_PERCHIP,
.offs = 0,
.len = 4,
.veroffs = 4,
.maxblocks = 4,
.pattern = bbt_pattern,
};
static struct nand_bbt_descr bbt_mirror_descr = {
.options = NAND_BBT_LASTBLOCK | NAND_BBT_CREATE | NAND_BBT_WRITE |
NAND_BBT_2BIT | NAND_BBT_VERSION | NAND_BBT_PERCHIP,
.offs = 0,
.len = 4,
.veroffs = 4,
.maxblocks = 4,
.pattern = mirror_pattern,
};
#endif
int board_nand_init(struct nand_chip *this)
{
struct mtd_info *mtd;
uint16_t tmp;
int err = 0;
#ifdef CONFIG_SYS_NAND_USE_FLASH_BBT
this->options |= NAND_USE_FLASH_BBT;
this->bbt_td = &bbt_main_descr;
this->bbt_md = &bbt_mirror_descr;
#endif
/* structures must be linked */
mtd = &host->mtd;
mtd->priv = this;