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From b288061f27dca116f164b39a24844932d74c3b88 Mon Sep 17 00:00:00 2001
From: Timo Ketola <timo@exertus.fi>
Date: Wed, 18 Apr 2012 22:55:31 +0000
Subject: [PATCH 30/56] imx: nand: Support flash based BBT
Signed-off-by: Timo Ketola <timo@exertus.fi>
Acked-by: Scott Wood <scottwood@freescale.com>
---
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;
--
1.7.10
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