diff options
| author | Akinobu Mita <akinobu.mita@gmail.com> | 2009-10-22 11:53:32 +0400 |
|---|---|---|
| committer | David Woodhouse <David.Woodhouse@intel.com> | 2009-11-30 12:32:19 +0300 |
| commit | 1c63aca32903efc219fb9df72bae5344f3e54ed5 (patch) | |
| tree | f3731478a5b163344e55bdf03eef25895d03cdab /drivers/mtd/nand/nand_ecc.c | |
| parent | 3cf602532c535ec655725e9833378e04c9fd7783 (diff) | |
| download | linux-1c63aca32903efc219fb9df72bae5344f3e54ed5.tar.xz | |
mtd: Add __nand_calculate_ecc() to NAND ECC functions
Add __nand_calculate_ecc() which does not take struct mtd_info.
The built-in 256/512 software ECC calculation and correction tester
will use it.
Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Acked-by: Vimal Singh <vimalsingh@ti.com>
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
Diffstat (limited to 'drivers/mtd/nand/nand_ecc.c')
| -rw-r--r-- | drivers/mtd/nand/nand_ecc.c | 25 |
1 files changed, 20 insertions, 5 deletions
diff --git a/drivers/mtd/nand/nand_ecc.c b/drivers/mtd/nand/nand_ecc.c index db7ae9d6a296..809fb53304ae 100644 --- a/drivers/mtd/nand/nand_ecc.c +++ b/drivers/mtd/nand/nand_ecc.c @@ -150,20 +150,19 @@ static const char addressbits[256] = { }; /** - * nand_calculate_ecc - [NAND Interface] Calculate 3-byte ECC for 256/512-byte + * __nand_calculate_ecc - [NAND Interface] Calculate 3-byte ECC for 256/512-byte * block - * @mtd: MTD block structure * @buf: input buffer with raw data + * @eccsize: data bytes per ecc step (256 or 512) * @code: output buffer with ECC */ -int nand_calculate_ecc(struct mtd_info *mtd, const unsigned char *buf, +void __nand_calculate_ecc(const unsigned char *buf, unsigned int eccsize, unsigned char *code) { int i; const uint32_t *bp = (uint32_t *)buf; /* 256 or 512 bytes/ecc */ - const uint32_t eccsize_mult = - (((struct nand_chip *)mtd->priv)->ecc.size) >> 8; + const uint32_t eccsize_mult = eccsize >> 8; uint32_t cur; /* current value in buffer */ /* rp0..rp15..rp17 are the various accumulated parities (per byte) */ uint32_t rp0, rp1, rp2, rp3, rp4, rp5, rp6, rp7; @@ -412,6 +411,22 @@ int nand_calculate_ecc(struct mtd_info *mtd, const unsigned char *buf, (invparity[par & 0x55] << 2) | (invparity[rp17] << 1) | (invparity[rp16] << 0); +} +EXPORT_SYMBOL(__nand_calculate_ecc); + +/** + * nand_calculate_ecc - [NAND Interface] Calculate 3-byte ECC for 256/512-byte + * block + * @mtd: MTD block structure + * @buf: input buffer with raw data + * @code: output buffer with ECC + */ +int nand_calculate_ecc(struct mtd_info *mtd, const unsigned char *buf, + unsigned char *code) +{ + __nand_calculate_ecc(buf, + ((struct nand_chip *)mtd->priv)->ecc.size, code); + return 0; } EXPORT_SYMBOL(nand_calculate_ecc); |