diff options
author | Stefan Roese <sr@denx.de> | 2008-12-02 11:06:47 +0100 |
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committer | Scott Wood <scottwood@freescale.com> | 2009-01-23 10:32:48 -0600 |
commit | 1ae39862044ebb1e682234b51f94421e3f871d6a (patch) | |
tree | bc16379a4c30fcac163991fdb20b3dfbe9c48f6d /drivers/mtd/onenand/onenand_base.c | |
parent | 1714f51a2009baaecf3d4f6e3bd8c4e93a8d3f23 (diff) | |
download | u-boot-imx-1ae39862044ebb1e682234b51f94421e3f871d6a.zip u-boot-imx-1ae39862044ebb1e682234b51f94421e3f871d6a.tar.gz u-boot-imx-1ae39862044ebb1e682234b51f94421e3f871d6a.tar.bz2 |
OneNAND: Additional sync with 2.6.27
- Add subpage write support
- Add onenand_oob_64/32 ecclayout
This has been missing and without it UBI has some incompatibilies issues
with the current (>= 2.6.27) Linux kernel version. vid_hdr_offset is
placed differently (2048 instead of 512) without this fix.
Signed-off-by: Stefan Roese <sr@denx.de>
Signed-off-by: Scott Wood <scottwood@freescale.com>
Diffstat (limited to 'drivers/mtd/onenand/onenand_base.c')
-rw-r--r-- | drivers/mtd/onenand/onenand_base.c | 72 |
1 files changed, 71 insertions, 1 deletions
diff --git a/drivers/mtd/onenand/onenand_base.c b/drivers/mtd/onenand/onenand_base.c index dcc969f..d482437 100644 --- a/drivers/mtd/onenand/onenand_base.c +++ b/drivers/mtd/onenand/onenand_base.c @@ -36,6 +36,35 @@ static inline void *memcpy_16(void *dst, const void *src, unsigned int len) return ret; } +/** + * onenand_oob_64 - oob info for large (2KB) page + */ +static struct nand_ecclayout onenand_oob_64 = { + .eccbytes = 20, + .eccpos = { + 8, 9, 10, 11, 12, + 24, 25, 26, 27, 28, + 40, 41, 42, 43, 44, + 56, 57, 58, 59, 60, + }, + .oobfree = { + {2, 3}, {14, 2}, {18, 3}, {30, 2}, + {34, 3}, {46, 2}, {50, 3}, {62, 2} + } +}; + +/** + * onenand_oob_32 - oob info for middle (1KB) page + */ +static struct nand_ecclayout onenand_oob_32 = { + .eccbytes = 10, + .eccpos = { + 8, 9, 10, 11, 12, + 24, 25, 26, 27, 28, + }, + .oobfree = { {2, 3}, {14, 2}, {18, 3}, {30, 2} } +}; + static const unsigned char ffchars[] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* 16 */ @@ -1079,7 +1108,7 @@ static int onenand_verify(struct mtd_info *mtd, const u_char *buf, loff_t addr, #define onenand_verify_oob(...) (0) #endif -#define NOTALIGNED(x) ((x & (mtd->writesize - 1)) != 0) +#define NOTALIGNED(x) ((x & (this->subpagesize - 1)) != 0) /** * onenand_fill_auto_oob - [Internal] oob auto-placement transfer @@ -2058,6 +2087,7 @@ static int onenand_probe(struct mtd_info *mtd) */ int onenand_scan(struct mtd_info *mtd, int maxchips) { + int i; struct onenand_chip *this = mtd->priv; if (!this->read_word) @@ -2115,6 +2145,46 @@ int onenand_scan(struct mtd_info *mtd, int maxchips) this->options |= ONENAND_OOBBUF_ALLOC; } + this->state = FL_READY; + + /* + * Allow subpage writes up to oobsize. + */ + switch (mtd->oobsize) { + case 64: + this->ecclayout = &onenand_oob_64; + mtd->subpage_sft = 2; + break; + + case 32: + this->ecclayout = &onenand_oob_32; + mtd->subpage_sft = 1; + break; + + default: + printk(KERN_WARNING "No OOB scheme defined for oobsize %d\n", + mtd->oobsize); + mtd->subpage_sft = 0; + /* To prevent kernel oops */ + this->ecclayout = &onenand_oob_32; + break; + } + + this->subpagesize = mtd->writesize >> mtd->subpage_sft; + + /* + * The number of bytes available for a client to place data into + * the out of band area + */ + this->ecclayout->oobavail = 0; + for (i = 0; i < MTD_MAX_OOBFREE_ENTRIES && + this->ecclayout->oobfree[i].length; i++) + this->ecclayout->oobavail += + this->ecclayout->oobfree[i].length; + mtd->oobavail = this->ecclayout->oobavail; + + mtd->ecclayout = this->ecclayout; + /* Unlock whole block */ onenand_unlock_all(mtd); |