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-rw-r--r--arch/arm/plat-mxc/include/mach/mxc_nand.h3
-rw-r--r--drivers/mtd/nand/mxc_nand.c34
2 files changed, 36 insertions, 1 deletions
diff --git a/arch/arm/plat-mxc/include/mach/mxc_nand.h b/arch/arm/plat-mxc/include/mach/mxc_nand.h
index 2b972df22d1..5d2d21d414e 100644
--- a/arch/arm/plat-mxc/include/mach/mxc_nand.h
+++ b/arch/arm/plat-mxc/include/mach/mxc_nand.h
@@ -22,6 +22,7 @@
struct mxc_nand_platform_data {
int width; /* data bus width in bytes */
- int hw_ecc; /* 0 if supress hardware ECC */
+ int hw_ecc:1; /* 0 if supress hardware ECC */
+ int flash_bbt:1; /* set to 1 to use a flash based bbt */
};
#endif /* __ASM_ARCH_NAND_H */
diff --git a/drivers/mtd/nand/mxc_nand.c b/drivers/mtd/nand/mxc_nand.c
index 2e3f3fbcd67..044a5748302 100644
--- a/drivers/mtd/nand/mxc_nand.c
+++ b/drivers/mtd/nand/mxc_nand.c
@@ -648,6 +648,33 @@ static void mxc_nand_command(struct mtd_info *mtd, unsigned command,
}
}
+/*
+ * The generic flash bbt decriptors overlap with our ecc
+ * hardware, so define some i.MX specific ones.
+ */
+static uint8_t bbt_pattern[] = { 'B', 'b', 't', '0' };
+static uint8_t 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,
+};
+
static int __init mxcnd_probe(struct platform_device *pdev)
{
struct nand_chip *this;
@@ -786,6 +813,13 @@ static int __init mxcnd_probe(struct platform_device *pdev)
if (pdata->width == 2)
this->options |= NAND_BUSWIDTH_16;
+ if (pdata->flash_bbt) {
+ this->bbt_td = &bbt_main_descr;
+ this->bbt_md = &bbt_mirror_descr;
+ /* update flash based bbt */
+ this->options |= NAND_USE_FLASH_BBT;
+ }
+
/* first scan to find the device and get the page size */
if (nand_scan_ident(mtd, 1)) {
err = -ENXIO;