From a1028730b5a5f8266fc3a198cd626bf73e157e6c Mon Sep 17 00:00:00 2001 From: Timo Ketola Date: Wed, 18 Apr 2012 22:55:31 +0000 Subject: [PATCH] imx: nand: Support flash based BBT Signed-off-by: Timo Ketola Acked-by: Scott Wood --- drivers/mtd/nand/mxc_nand.c | 33 +++++++++++++++++++++++++++++++++ 1 file changed, 33 insertions(+) diff --git a/drivers/mtd/nand/mxc_nand.c b/drivers/mtd/nand/mxc_nand.c index 35e89a0..936186f 100644 --- a/drivers/mtd/nand/mxc_nand.c +++ b/drivers/mtd/nand/mxc_nand.c @@ -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;