diff options
Diffstat (limited to 'drivers/mtd/nand/mxc_nand.c')
| -rw-r--r-- | drivers/mtd/nand/mxc_nand.c | 34 |
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; |