diff options
| -rw-r--r-- | drivers/mtd/nand/nand_util.c | 97 | ||||
| -rw-r--r-- | include/nand.h | 4 |
2 files changed, 100 insertions, 1 deletions
diff --git a/drivers/mtd/nand/nand_util.c b/drivers/mtd/nand/nand_util.c index afdd160d81..f487756071 100644 --- a/drivers/mtd/nand/nand_util.c +++ b/drivers/mtd/nand/nand_util.c @@ -464,6 +464,87 @@ static size_t drop_ffs(const nand_info_t *nand, const u_char *buf, #endif /** + * nand_verify_page_oob: + * + * Verify a page of NAND flash, including the OOB. + * Reads page of NAND and verifies the contents and OOB against the + * values in ops. + * + * @param nand NAND device + * @param ops MTD operations, including data to verify + * @param ofs offset in flash + * @return 0 in case of success + */ +int nand_verify_page_oob(nand_info_t *nand, struct mtd_oob_ops *ops, loff_t ofs) +{ + int rval; + struct mtd_oob_ops vops; + size_t verlen = nand->writesize + nand->oobsize; + + memcpy(&vops, ops, sizeof(vops)); + + vops.datbuf = malloc(verlen); + + if (!vops.datbuf) + return -ENOMEM; + + vops.oobbuf = vops.datbuf + nand->writesize; + + rval = mtd_read_oob(nand, ofs, &vops); + if (!rval) + rval = memcmp(ops->datbuf, vops.datbuf, vops.len); + if (!rval) + rval = memcmp(ops->oobbuf, vops.oobbuf, vops.ooblen); + + free(vops.datbuf); + + return rval ? -EIO : 0; +} + +/** + * nand_verify: + * + * Verify a region of NAND flash. + * Reads NAND in page-sized chunks and verifies the contents against + * the contents of a buffer. The offset into the NAND must be + * page-aligned, and the function doesn't handle skipping bad blocks. + * + * @param nand NAND device + * @param ofs offset in flash + * @param len buffer length + * @param buf buffer to read from + * @return 0 in case of success + */ +int nand_verify(nand_info_t *nand, loff_t ofs, size_t len, u_char *buf) +{ + int rval = 0; + size_t verofs; + size_t verlen = nand->writesize; + uint8_t *verbuf = malloc(verlen); + + if (!verbuf) + return -ENOMEM; + + /* Read the NAND back in page-size groups to limit malloc size */ + for (verofs = ofs; verofs < ofs + len; + verofs += verlen, buf += verlen) { + verlen = min(nand->writesize, (uint32_t)(ofs + len - verofs)); + rval = nand_read(nand, verofs, &verlen, verbuf); + if (!rval || (rval == -EUCLEAN)) + rval = memcmp(buf, verbuf, verlen); + + if (rval) + break; + } + + free(verbuf); + + return rval ? -EIO : 0; +} + + + +/** * nand_write_skip_bad: * * Write image to NAND flash. @@ -501,7 +582,7 @@ int nand_write_skip_bad(nand_info_t *nand, loff_t offset, size_t *length, #ifdef CONFIG_CMD_NAND_YAFFS if (flags & WITH_YAFFS_OOB) { - if (flags & ~WITH_YAFFS_OOB) + if (flags & (~WITH_YAFFS_OOB & ~WITH_WR_VERIFY)) return -EINVAL; int pages; @@ -554,6 +635,10 @@ int nand_write_skip_bad(nand_info_t *nand, loff_t offset, size_t *length, if (!need_skip && !(flags & WITH_DROP_FFS)) { rval = nand_write(nand, offset, length, buffer); + + if ((flags & WITH_WR_VERIFY) && !rval) + rval = nand_verify(nand, offset, *length, buffer); + if (rval == 0) return 0; @@ -601,6 +686,11 @@ int nand_write_skip_bad(nand_info_t *nand, loff_t offset, size_t *length, ops.oobbuf = ops.datbuf + pagesize; rval = mtd_write_oob(nand, offset, &ops); + + if ((flags & WITH_WR_VERIFY) && !rval) + rval = nand_verify_page_oob(nand, + &ops, offset); + if (rval != 0) break; @@ -620,6 +710,11 @@ int nand_write_skip_bad(nand_info_t *nand, loff_t offset, size_t *length, rval = nand_write(nand, offset, &truncated_write_size, p_buffer); + + if ((flags & WITH_WR_VERIFY) && !rval) + rval = nand_verify(nand, offset, + truncated_write_size, p_buffer); + offset += write_size; p_buffer += write_size; } diff --git a/include/nand.h b/include/nand.h index 673597e807..8ea4d5d75c 100644 --- a/include/nand.h +++ b/include/nand.h @@ -108,11 +108,15 @@ int nand_read_skip_bad(nand_info_t *nand, loff_t offset, size_t *length, * is a 'mode' meaning it cannot be mixed with * other flags */ #define WITH_DROP_FFS (1 << 1) /* drop trailing all-0xff pages */ +#define WITH_WR_VERIFY (1 << 2) /* verify data was written correctly */ int nand_write_skip_bad(nand_info_t *nand, loff_t offset, size_t *length, size_t *actual, loff_t lim, u_char *buffer, int flags); int nand_erase_opts(nand_info_t *meminfo, const nand_erase_options_t *opts); int nand_torture(nand_info_t *nand, loff_t offset); +int nand_verify_page_oob(nand_info_t *nand, struct mtd_oob_ops *ops, + loff_t ofs); +int nand_verify(nand_info_t *nand, loff_t ofs, size_t len, u_char *buf); #define NAND_LOCK_STATUS_TIGHT 0x01 #define NAND_LOCK_STATUS_UNLOCK 0x04 |