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OneNAND: Add write_oob verify function

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Signed-off-by: Jarkko Lavinen <jarkko.lavinen@nokia.com>
This commit is contained in:
Kyungmin Park 2006-05-12 17:02:41 +03:00 committed by Jarkko Lavinen
parent d9777f1c42
commit 8e6ec69059
1 changed files with 43 additions and 4 deletions
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47
drivers/mtd/onenand/onenand_base.c
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@ -758,6 +758,36 @@ 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
@ -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;
}
/**