Commit 8e6ec690 authored by Kyungmin Park's avatar Kyungmin Park Committed by Jarkko Lavinen
Browse files

OneNAND: Add write_oob verify function 



Signed-off-by: default avatarJarkko Lavinen <jarkko.lavinen@nokia.com>
parent d9777f1c

drivers/mtd/onenand/onenand_base.c

+43 −4
Original line number Diff line number Diff line
@@ -758,6 +758,36 @@ static int onenand_read_oob(struct mtd_info *mtd, loff_t from, size_t len, 
}



#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 @@ static int onenand_write_oob(struct mtd_info *mtd, loff_t to, size_t len, 


	*retlen = written;



	return 0;

	return ret;

}



/**