[U-Boot] [PATCH 4/9] imx: nand: Support flash based BBT

Timo Ketola
2012-04-18T07:57:27Z

Signed-off-by: Timo Ketola <timo@exertus.fi>
---
drivers/mtd/nand/mxc_nand.c | 35 +++++++++++++++++++++++++++++++++++
1 files changed, 35 insertions(+), 0 deletions(-)

diff --git a/drivers/mtd/nand/mxc_nand.c b/drivers/mtd/nand/mxc_nand.c
index 35e89a0..d97e7c3 100644
--- a/drivers/mtd/nand/mxc_nand.c
+++ b/drivers/mtd/nand/mxc_nand.c
@@ -1302,12 +1302,47 @@ 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;
--
1.7.5.4