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authorTimo Ketola <timo@exertus.fi>2012-04-18 22:55:31 +0000
committerAlbert ARIBAUD <albert.u.boot@aribaud.net>2012-05-15 08:31:33 +0200
commita1028730b5a5f8266fc3a198cd626bf73e157e6c (patch)
tree16863ff97110efaa32008b21b4ef6466cd544d90
parenteba1868be44a272a2c2b38189c86fbad0a9a0804 (diff)
imx: nand: Support flash based BBT
Signed-off-by: Timo Ketola <timo@exertus.fi> Acked-by: Scott Wood <scottwood@freescale.com>
-rw-r--r--drivers/mtd/nand/mxc_nand.c33
1 files changed, 33 insertions, 0 deletions
diff --git a/drivers/mtd/nand/mxc_nand.c b/drivers/mtd/nand/mxc_nand.c
index 35e89a0f4d..936186f75e 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;