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authorBarry Song <barry.song@analog.com>2010-08-05 19:07:44 +0400
committerDavid Woodhouse <David.Woodhouse@intel.com>2010-08-05 19:14:04 +0400
commit085d45fb5216c25b69103e5d861fabdc4389e221 (patch)
treeddddd005d86f5e4e084b3d0f01e4a9a12fc23645 /drivers/mtd
parent7ee064c90b3a65aa0c8d8cd87681177645db494e (diff)
downloadlinux-085d45fb5216c25b69103e5d861fabdc4389e221.tar.xz
mtd: Blackfin NFC: fix raw page write/read handling
Our write_buf/read_buf funcs always do ECC in HW ECC mode. That is not needed for raw funcs. In fact, write_buf/read_buf should be a pure func for data input/output while chip->ecc.hwctl controls ECC. Unfortunately, we can't separate ECC from normal data input/output in our NFC, so our DMA write_buf/read_buf entries are coupled with ECC operations closely. Thus we need to provide dedicated read_page_raw/write_page_raw funcs where we do non-DMA transactions so as to avoid automatic ECC. Signed-off-by: Barry Song <barry.song@analog.com> Signed-off-by: Mike Frysinger <vapier@gentoo.org> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
Diffstat (limited to 'drivers/mtd')
-rw-r--r--drivers/mtd/nand/bf5xx_nand.c18
1 files changed, 18 insertions, 0 deletions
diff --git a/drivers/mtd/nand/bf5xx_nand.c b/drivers/mtd/nand/bf5xx_nand.c
index 524cf5f41523..ca39819982bf 100644
--- a/drivers/mtd/nand/bf5xx_nand.c
+++ b/drivers/mtd/nand/bf5xx_nand.c
@@ -571,6 +571,22 @@ static void bf5xx_nand_dma_write_buf(struct mtd_info *mtd,
bf5xx_nand_write_buf(mtd, buf, len);
}
+static int bf5xx_nand_read_page_raw(struct mtd_info *mtd, struct nand_chip *chip,
+ uint8_t *buf, int page)
+{
+ bf5xx_nand_read_buf(mtd, buf, mtd->writesize);
+ bf5xx_nand_read_buf(mtd, chip->oob_poi, mtd->oobsize);
+
+ return 0;
+}
+
+static void bf5xx_nand_write_page_raw(struct mtd_info *mtd, struct nand_chip *chip,
+ const uint8_t *buf)
+{
+ bf5xx_nand_write_buf(mtd, buf, mtd->writesize);
+ bf5xx_nand_write_buf(mtd, chip->oob_poi, mtd->oobsize);
+}
+
/*
* System initialization functions
*/
@@ -795,6 +811,8 @@ static int __devinit bf5xx_nand_probe(struct platform_device *pdev)
chip->ecc.correct = bf5xx_nand_correct_data;
chip->ecc.mode = NAND_ECC_HW;
chip->ecc.hwctl = bf5xx_nand_enable_hwecc;
+ chip->ecc.read_page_raw = bf5xx_nand_read_page_raw;
+ chip->ecc.write_page_raw = bf5xx_nand_write_page_raw;
} else {
chip->ecc.mode = NAND_ECC_SOFT;
}