summaryrefslogtreecommitdiff
path: root/drivers/mtd/nand/fsl_ifc_nand.c
diff options
context:
space:
mode:
authorBrian Norris <computersforpeace@gmail.com>2012-05-02 10:14:55 -0700
committerDavid Woodhouse <David.Woodhouse@intel.com>2012-05-13 23:20:00 -0500
commit1fbb938dff5b6bb4514a4e7600276b03c7f08e25 (patch)
tree49ab8089580041bcbd767ff7a57aa7188ee6b6c0 /drivers/mtd/nand/fsl_ifc_nand.c
parentb4f7aa84d6ff44327ab91a2973ebf0c2a7797d24 (diff)
mtd: nand: add 'oob_required' argument to NAND {read,write}_page interfaces
New NAND controllers can perform read/write via HW engines which don't expose OOB data in their DMA mode. To reflect this, we should rework the nand_chip / nand_ecc_ctrl interfaces that assume that drivers will always read/write OOB data in the nand_chip.oob_poi buffer. A better interface includes a boolean argument that explicitly tells the callee when OOB data is requested by the calling layer (for reading/writing to/from nand_chip.oob_poi). This patch adds the 'oob_required' parameter to each relevant {read,write}_page interface; all 'oob_required' parameters are left unused for now. The next patch will set the parameter properly in the nand_base.c callers, and follow-up patches will make use of 'oob_required' in some of the callee functions. Note that currently, there is no harm in ignoring the 'oob_required' parameter and *always* utilizing nand_chip.oob_poi, but there can be performance/complexity/design benefits from avoiding filling oob_poi in the common case. I will try to implement this for some drivers which can be ported easily. Note: I couldn't compile-test all of these easily, as some had ARCH dependencies. [dwmw2: Merge later 1/0 vs. true/false cleanup] Signed-off-by: Brian Norris <computersforpeace@gmail.com> Reviewed-by: Shmulik Ladkani <shmulik.ladkani@gmail.com> Acked-by: Jiandong Zheng <jdzheng@broadcom.com> Acked-by: Mike Dunn <mikedunn@newsguy.com> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
Diffstat (limited to 'drivers/mtd/nand/fsl_ifc_nand.c')
-rw-r--r--drivers/mtd/nand/fsl_ifc_nand.c10
1 files changed, 4 insertions, 6 deletions
diff --git a/drivers/mtd/nand/fsl_ifc_nand.c b/drivers/mtd/nand/fsl_ifc_nand.c
index dffd2fa353ae..c085df3d816a 100644
--- a/drivers/mtd/nand/fsl_ifc_nand.c
+++ b/drivers/mtd/nand/fsl_ifc_nand.c
@@ -698,9 +698,8 @@ static int fsl_ifc_wait(struct mtd_info *mtd, struct nand_chip *chip)
return nand_fsr | NAND_STATUS_WP;
}
-static int fsl_ifc_read_page(struct mtd_info *mtd,
- struct nand_chip *chip,
- uint8_t *buf, int page)
+static int fsl_ifc_read_page(struct mtd_info *mtd, struct nand_chip *chip,
+ uint8_t *buf, int oob_required, int page)
{
struct fsl_ifc_mtd *priv = chip->priv;
struct fsl_ifc_ctrl *ctrl = priv->ctrl;
@@ -721,9 +720,8 @@ static int fsl_ifc_read_page(struct mtd_info *mtd,
/* ECC will be calculated automatically, and errors will be detected in
* waitfunc.
*/
-static void fsl_ifc_write_page(struct mtd_info *mtd,
- struct nand_chip *chip,
- const uint8_t *buf)
+static void fsl_ifc_write_page(struct mtd_info *mtd, struct nand_chip *chip,
+ const uint8_t *buf, int oob_required)
{
fsl_ifc_write_buf(mtd, buf, mtd->writesize);
fsl_ifc_write_buf(mtd, chip->oob_poi, mtd->oobsize);