summaryrefslogtreecommitdiffstats
path: root/drivers
diff options
context:
space:
mode:
authorKyungmin Park <kyungmin.park@samsung.com>2006-05-12 17:02:41 +0300
committerJarkko Lavinen <lavinen@pentafluge.infradead.org>2006-05-12 15:35:47 +0100
commit8e6ec69059ba0eecbb2226d3d9e45c6efe6fb82b (patch)
treea44175779ce9ffc379f333709d0903b463fb5c47 /drivers
parentd9777f1c42bffff0d21cd029a2415776aa874e96 (diff)
downloadlinux-8e6ec69059ba0eecbb2226d3d9e45c6efe6fb82b.tar.bz2
OneNAND: Add write_oob verify function
Signed-off-by: Jarkko Lavinen <jarkko.lavinen@nokia.com>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/mtd/onenand/onenand_base.c47
1 files changed, 43 insertions, 4 deletions
diff --git a/drivers/mtd/onenand/onenand_base.c b/drivers/mtd/onenand/onenand_base.c
index b6a73b72f600..e342ba04118a 100644
--- a/drivers/mtd/onenand/onenand_base.c
+++ b/drivers/mtd/onenand/onenand_base.c
@@ -759,6 +759,36 @@ out:
#ifdef CONFIG_MTD_ONENAND_VERIFY_WRITE
/**
+ * onenand_verify_oob - [GENERIC] verify the oob contents after a write
+ * @param mtd MTD device structure
+ * @param buf the databuffer to verify
+ * @param to offset to read from
+ * @param len number of bytes to read and compare
+ *
+ */
+static int onenand_verify_oob(struct mtd_info *mtd, const u_char *buf, loff_t to, int len)
+{
+ struct onenand_chip *this = mtd->priv;
+ char *readp = this->page_buf;
+ int column = to & (mtd->oobsize - 1);
+ int status, i;
+
+ this->command(mtd, ONENAND_CMD_READOOB, to, mtd->oobsize);
+ onenand_update_bufferram(mtd, to, 0);
+ status = this->wait(mtd, FL_READING);
+ if (status)
+ return status;
+
+ this->read_bufferram(mtd, ONENAND_SPARERAM, readp, column, len);
+
+ for(i = 0; i < len; i++)
+ if (buf[i] != 0xFF && buf[i] != readp[i])
+ return -EBADMSG;
+
+ return 0;
+}
+
+/**
* onenand_verify_page - [GENERIC] verify the chip contents after a write
* @param mtd MTD device structure
* @param buf the databuffer to verify
@@ -790,6 +820,7 @@ static int onenand_verify_page(struct mtd_info *mtd, u_char *buf, loff_t addr)
}
#else
#define onenand_verify_page(...) (0)
+#define onenand_verify_oob(...) (0)
#endif
#define NOTALIGNED(x) ((x & (mtd->oobblock - 1)) != 0)
@@ -909,7 +940,7 @@ static int onenand_write_oob(struct mtd_info *mtd, loff_t to, size_t len,
size_t *retlen, const u_char *buf)
{
struct onenand_chip *this = mtd->priv;
- int column, status;
+ int column, ret = 0;
int written = 0;
DEBUG(MTD_DEBUG_LEVEL3, "onenand_write_oob: to = 0x%08x, len = %i\n", (unsigned int) to, (int) len);
@@ -941,9 +972,17 @@ static int onenand_write_oob(struct mtd_info *mtd, loff_t to, size_t len,
onenand_update_bufferram(mtd, to, 0);
- status = this->wait(mtd, FL_WRITING);
- if (status)
+ ret = this->wait(mtd, FL_WRITING);
+ if (ret) {
+ DEBUG(MTD_DEBUG_LEVEL0, "onenand_write_oob: write filaed %d\n", ret);
+ goto out;
+ }
+
+ ret = onenand_verify_oob(mtd, buf, to, thislen);
+ if (ret) {
+ DEBUG(MTD_DEBUG_LEVEL0, "onenand_write_oob: verify failed %d\n", ret);
goto out;
+ }
written += thislen;
@@ -960,7 +999,7 @@ out:
*retlen = written;
- return 0;
+ return ret;
}
/**