diff options
Diffstat (limited to 'drivers/mtd/nand')
-rw-r--r-- | drivers/mtd/nand/raw/fsmc_nand.c | 1 | ||||
-rw-r--r-- | drivers/mtd/nand/raw/nand_base.c | 4 | ||||
-rw-r--r-- | drivers/mtd/nand/raw/nand_ecc.c | 89 | ||||
-rw-r--r-- | drivers/mtd/nand/raw/tmio_nand.c | 5 | ||||
-rw-r--r-- | drivers/mtd/nand/raw/txx9ndfmc.c | 3 |
5 files changed, 49 insertions, 53 deletions
diff --git a/drivers/mtd/nand/raw/fsmc_nand.c b/drivers/mtd/nand/raw/fsmc_nand.c index f9874fc72f30..70ac8d875218 100644 --- a/drivers/mtd/nand/raw/fsmc_nand.c +++ b/drivers/mtd/nand/raw/fsmc_nand.c @@ -949,6 +949,7 @@ static int fsmc_nand_attach_chip(struct nand_chip *nand) nand->ecc.correct = nand_correct_data; nand->ecc.bytes = 3; nand->ecc.strength = 1; + nand->ecc.options |= NAND_ECC_SOFT_HAMMING_SM_ORDER; break; case NAND_ECC_SOFT: diff --git a/drivers/mtd/nand/raw/nand_base.c b/drivers/mtd/nand/raw/nand_base.c index dc3955da0426..05bd0779fe9b 100644 --- a/drivers/mtd/nand/raw/nand_base.c +++ b/drivers/mtd/nand/raw/nand_base.c @@ -5045,6 +5045,10 @@ static int nand_set_ecc_soft_ops(struct mtd_info *mtd) ecc->size = 256; ecc->bytes = 3; ecc->strength = 1; + + if (IS_ENABLED(CONFIG_MTD_NAND_ECC_SMC)) + ecc->options |= NAND_ECC_SOFT_HAMMING_SM_ORDER; + return 0; case NAND_ECC_BCH: if (!mtd_nand_has_bch()) { diff --git a/drivers/mtd/nand/raw/nand_ecc.c b/drivers/mtd/nand/raw/nand_ecc.c index 93df8e73f577..4f4347533058 100644 --- a/drivers/mtd/nand/raw/nand_ecc.c +++ b/drivers/mtd/nand/raw/nand_ecc.c @@ -132,9 +132,10 @@ static const char addressbits[256] = { * @buf: input buffer with raw data * @eccsize: data bytes per ECC step (256 or 512) * @code: output buffer with ECC + * @sm_order: Smart Media byte ordering */ void __nand_calculate_ecc(const unsigned char *buf, unsigned int eccsize, - unsigned char *code) + unsigned char *code, bool sm_order) { int i; const uint32_t *bp = (uint32_t *)buf; @@ -330,45 +331,26 @@ void __nand_calculate_ecc(const unsigned char *buf, unsigned int eccsize, * possible, but benchmarks showed that on the system this is developed * the code below is the fastest */ -#ifdef CONFIG_MTD_NAND_ECC_SMC - code[0] = - (invparity[rp7] << 7) | - (invparity[rp6] << 6) | - (invparity[rp5] << 5) | - (invparity[rp4] << 4) | - (invparity[rp3] << 3) | - (invparity[rp2] << 2) | - (invparity[rp1] << 1) | - (invparity[rp0]); - code[1] = - (invparity[rp15] << 7) | - (invparity[rp14] << 6) | - (invparity[rp13] << 5) | - (invparity[rp12] << 4) | - (invparity[rp11] << 3) | - (invparity[rp10] << 2) | - (invparity[rp9] << 1) | - (invparity[rp8]); -#else - code[1] = - (invparity[rp7] << 7) | - (invparity[rp6] << 6) | - (invparity[rp5] << 5) | - (invparity[rp4] << 4) | - (invparity[rp3] << 3) | - (invparity[rp2] << 2) | - (invparity[rp1] << 1) | - (invparity[rp0]); - code[0] = - (invparity[rp15] << 7) | - (invparity[rp14] << 6) | - (invparity[rp13] << 5) | - (invparity[rp12] << 4) | - (invparity[rp11] << 3) | - (invparity[rp10] << 2) | - (invparity[rp9] << 1) | - (invparity[rp8]); -#endif + if (sm_order) { + code[0] = (invparity[rp7] << 7) | (invparity[rp6] << 6) | + (invparity[rp5] << 5) | (invparity[rp4] << 4) | + (invparity[rp3] << 3) | (invparity[rp2] << 2) | + (invparity[rp1] << 1) | (invparity[rp0]); + code[1] = (invparity[rp15] << 7) | (invparity[rp14] << 6) | + (invparity[rp13] << 5) | (invparity[rp12] << 4) | + (invparity[rp11] << 3) | (invparity[rp10] << 2) | + (invparity[rp9] << 1) | (invparity[rp8]); + } else { + code[1] = (invparity[rp7] << 7) | (invparity[rp6] << 6) | + (invparity[rp5] << 5) | (invparity[rp4] << 4) | + (invparity[rp3] << 3) | (invparity[rp2] << 2) | + (invparity[rp1] << 1) | (invparity[rp0]); + code[0] = (invparity[rp15] << 7) | (invparity[rp14] << 6) | + (invparity[rp13] << 5) | (invparity[rp12] << 4) | + (invparity[rp11] << 3) | (invparity[rp10] << 2) | + (invparity[rp9] << 1) | (invparity[rp8]); + } + if (eccsize_mult == 1) code[2] = (invparity[par & 0xf0] << 7) | @@ -401,7 +383,9 @@ EXPORT_SYMBOL(__nand_calculate_ecc); int nand_calculate_ecc(struct nand_chip *chip, const unsigned char *buf, unsigned char *code) { - __nand_calculate_ecc(buf, chip->ecc.size, code); + bool sm_order = chip->ecc.options & NAND_ECC_SOFT_HAMMING_SM_ORDER; + + __nand_calculate_ecc(buf, chip->ecc.size, code, sm_order); return 0; } @@ -413,12 +397,13 @@ EXPORT_SYMBOL(nand_calculate_ecc); * @read_ecc: ECC from the chip * @calc_ecc: the ECC calculated from raw data * @eccsize: data bytes per ECC step (256 or 512) + * @sm_order: Smart Media byte order * * Detect and correct a 1 bit error for eccsize byte block */ int __nand_correct_data(unsigned char *buf, unsigned char *read_ecc, unsigned char *calc_ecc, - unsigned int eccsize) + unsigned int eccsize, bool sm_order) { unsigned char b0, b1, b2, bit_addr; unsigned int byte_addr; @@ -430,13 +415,14 @@ int __nand_correct_data(unsigned char *buf, * we might need the xor result more than once, * so keep them in a local var */ -#ifdef CONFIG_MTD_NAND_ECC_SMC - b0 = read_ecc[0] ^ calc_ecc[0]; - b1 = read_ecc[1] ^ calc_ecc[1]; -#else - b0 = read_ecc[1] ^ calc_ecc[1]; - b1 = read_ecc[0] ^ calc_ecc[0]; -#endif + if (sm_order) { + b0 = read_ecc[0] ^ calc_ecc[0]; + b1 = read_ecc[1] ^ calc_ecc[1]; + } else { + b0 = read_ecc[1] ^ calc_ecc[1]; + b1 = read_ecc[0] ^ calc_ecc[0]; + } + b2 = read_ecc[2] ^ calc_ecc[2]; /* check if there are any bitfaults */ @@ -500,7 +486,10 @@ EXPORT_SYMBOL(__nand_correct_data); int nand_correct_data(struct nand_chip *chip, unsigned char *buf, unsigned char *read_ecc, unsigned char *calc_ecc) { - return __nand_correct_data(buf, read_ecc, calc_ecc, chip->ecc.size); + bool sm_order = chip->ecc.options & NAND_ECC_SOFT_HAMMING_SM_ORDER; + + return __nand_correct_data(buf, read_ecc, calc_ecc, chip->ecc.size, + sm_order); } EXPORT_SYMBOL(nand_correct_data); diff --git a/drivers/mtd/nand/raw/tmio_nand.c b/drivers/mtd/nand/raw/tmio_nand.c index 3297621241d2..f3b59e649b7d 100644 --- a/drivers/mtd/nand/raw/tmio_nand.c +++ b/drivers/mtd/nand/raw/tmio_nand.c @@ -295,10 +295,11 @@ static int tmio_nand_correct_data(struct nand_chip *chip, unsigned char *buf, int r0, r1; /* assume ecc.size = 512 and ecc.bytes = 6 */ - r0 = __nand_correct_data(buf, read_ecc, calc_ecc, 256); + r0 = __nand_correct_data(buf, read_ecc, calc_ecc, 256, false); if (r0 < 0) return r0; - r1 = __nand_correct_data(buf + 256, read_ecc + 3, calc_ecc + 3, 256); + r1 = __nand_correct_data(buf + 256, read_ecc + 3, calc_ecc + 3, 256, + false); if (r1 < 0) return r1; return r0 + r1; diff --git a/drivers/mtd/nand/raw/txx9ndfmc.c b/drivers/mtd/nand/raw/txx9ndfmc.c index 3a99c8e3f944..ddf0420c0997 100644 --- a/drivers/mtd/nand/raw/txx9ndfmc.c +++ b/drivers/mtd/nand/raw/txx9ndfmc.c @@ -198,7 +198,8 @@ static int txx9ndfmc_correct_data(struct nand_chip *chip, unsigned char *buf, int stat; for (eccsize = chip->ecc.size; eccsize > 0; eccsize -= 256) { - stat = __nand_correct_data(buf, read_ecc, calc_ecc, 256); + stat = __nand_correct_data(buf, read_ecc, calc_ecc, 256, + false); if (stat < 0) return stat; corrected += stat; |