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-rw-r--r--drivers/mtd/nand/nand_util.c97
-rw-r--r--include/nand.h4
2 files changed, 100 insertions, 1 deletions
diff --git a/drivers/mtd/nand/nand_util.c b/drivers/mtd/nand/nand_util.c
index afdd160..f487756 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 673597e..8ea4d5d 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