diff options
author | Sascha Hauer <s.hauer@pengutronix.de> | 2009-10-21 08:25:27 -0400 |
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committer | Sascha Hauer <s.hauer@pengutronix.de> | 2009-11-12 02:33:32 -0500 |
commit | f1372055df21734f042f12ab92852e9d350be8d0 (patch) | |
tree | fd4ef8a4b6eeb14bdf4afbf021bf0db1c24fba64 /drivers/mtd/nand | |
parent | f06368f7d15f6fc323ba0c71aec67b9b2dd5614a (diff) |
mxc_nand: Allow flash based bbt
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Diffstat (limited to 'drivers/mtd/nand')
-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 2e3f3fbcd67c..044a57483027 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, | |||
648 | } | 648 | } |
649 | } | 649 | } |
650 | 650 | ||
651 | /* | ||
652 | * The generic flash bbt decriptors overlap with our ecc | ||
653 | * hardware, so define some i.MX specific ones. | ||
654 | */ | ||
655 | static uint8_t bbt_pattern[] = { 'B', 'b', 't', '0' }; | ||
656 | static uint8_t mirror_pattern[] = { '1', 't', 'b', 'B' }; | ||
657 | |||
658 | static struct nand_bbt_descr bbt_main_descr = { | ||
659 | .options = NAND_BBT_LASTBLOCK | NAND_BBT_CREATE | NAND_BBT_WRITE | ||
660 | | NAND_BBT_2BIT | NAND_BBT_VERSION | NAND_BBT_PERCHIP, | ||
661 | .offs = 0, | ||
662 | .len = 4, | ||
663 | .veroffs = 4, | ||
664 | .maxblocks = 4, | ||
665 | .pattern = bbt_pattern, | ||
666 | }; | ||
667 | |||
668 | static struct nand_bbt_descr bbt_mirror_descr = { | ||
669 | .options = NAND_BBT_LASTBLOCK | NAND_BBT_CREATE | NAND_BBT_WRITE | ||
670 | | NAND_BBT_2BIT | NAND_BBT_VERSION | NAND_BBT_PERCHIP, | ||
671 | .offs = 0, | ||
672 | .len = 4, | ||
673 | .veroffs = 4, | ||
674 | .maxblocks = 4, | ||
675 | .pattern = mirror_pattern, | ||
676 | }; | ||
677 | |||
651 | static int __init mxcnd_probe(struct platform_device *pdev) | 678 | static int __init mxcnd_probe(struct platform_device *pdev) |
652 | { | 679 | { |
653 | struct nand_chip *this; | 680 | struct nand_chip *this; |
@@ -786,6 +813,13 @@ static int __init mxcnd_probe(struct platform_device *pdev) | |||
786 | if (pdata->width == 2) | 813 | if (pdata->width == 2) |
787 | this->options |= NAND_BUSWIDTH_16; | 814 | this->options |= NAND_BUSWIDTH_16; |
788 | 815 | ||
816 | if (pdata->flash_bbt) { | ||
817 | this->bbt_td = &bbt_main_descr; | ||
818 | this->bbt_md = &bbt_mirror_descr; | ||
819 | /* update flash based bbt */ | ||
820 | this->options |= NAND_USE_FLASH_BBT; | ||
821 | } | ||
822 | |||
789 | /* first scan to find the device and get the page size */ | 823 | /* first scan to find the device and get the page size */ |
790 | if (nand_scan_ident(mtd, 1)) { | 824 | if (nand_scan_ident(mtd, 1)) { |
791 | err = -ENXIO; | 825 | err = -ENXIO; |