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authorSascha Hauer <s.hauer@pengutronix.de>2009-10-21 14:25:27 +0200
committerSascha Hauer <s.hauer@pengutronix.de>2009-11-12 08:33:32 +0100
commitf1372055df21734f042f12ab92852e9d350be8d0 (patch)
treefd4ef8a4b6eeb14bdf4afbf021bf0db1c24fba64 /drivers/mtd
parentf06368f7d15f6fc323ba0c71aec67b9b2dd5614a (diff)
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mxc_nand: Allow flash based bbt
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Diffstat (limited to 'drivers/mtd')
-rw-r--r--drivers/mtd/nand/mxc_nand.c34
1 files changed, 34 insertions, 0 deletions
diff --git a/drivers/mtd/nand/mxc_nand.c b/drivers/mtd/nand/mxc_nand.c
index 2e3f3fb..044a574 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;