Re: [PATCH 2/2] mtd/nand: Fix IFC driver to support 2K NAND page
From: Scott Wood <hidden>
Date: 2012-01-03 19:50:02
On 12/28/2011 10:59 PM, Prabhakar Kushwaha wrote:
1) OOB area should be updated irrespective of NAND page size. Earlier it was updated only for 512byte NAND page. 2) During OOB update fbcr should be equal to OOB size. Signed-off-by: Poonam Aggrwal <redacted> Signed-off-by: Prabhakar Kushwaha <redacted> --- git://git.kernel.org/pub/scm/linux/kernel/git/galak/powerpc.git (branch next)
The IFC driver hasn't been merged into that tree that I can see.
quoted hunk ↗ jump to hunk
Tested on P1010RDB drivers/mtd/nand/fsl_ifc_nand.c | 20 ++++++++------------ 1 files changed, 8 insertions(+), 12 deletions(-)diff --git a/drivers/mtd/nand/fsl_ifc_nand.c b/drivers/mtd/nand/fsl_ifc_nand.c index 2df7206..2c02168 100644 --- a/drivers/mtd/nand/fsl_ifc_nand.c +++ b/drivers/mtd/nand/fsl_ifc_nand.c@@ -439,20 +439,16 @@ static void fsl_ifc_cmdfunc(struct mtd_info *mtd, unsigned int command, out_be32(&ifc->ifc_nand.nand_fir1, (IFC_FIR_OP_CW1 << IFC_NAND_FIR1_OP5_SHIFT)); - if (column >= mtd->writesize) { - /* OOB area --> READOOB */ - column -= mtd->writesize; - nand_fcr0 |= NAND_CMD_READOOB << - IFC_NAND_FCR0_CMD0_SHIFT; - ifc_nand_ctrl->oob = 1; - } else if (column < 256) + if (column < 256) /* First 256 bytes --> READ0 */ nand_fcr0 |= NAND_CMD_READ0 << IFC_NAND_FCR0_CMD0_SHIFT; - else - /* Second 256 bytes --> READ1 */ - nand_fcr0 |= - NAND_CMD_READ1 << IFC_NAND_FCR0_CMD0_SHIFT; + } + + if (column >= mtd->writesize) { + /* OOB area --> READOOB */ + column -= mtd->writesize; + ifc_nand_ctrl->oob = 1; }
Where is NAND_CMD_READOOB going to be set in the small-page case?
The small-page code should read something like:
if (column >= mtd->writesize) {
nand_fcr0 |=
NAND_CMD_READOOB << IFC_NAND_FCR0_CMD0_SHIFT;
} else {
nand_fcr0 |=
NAND_CMD_READ0 << IFC_NAND_FCR0_CMD0_SHIFT;
}
It looks like we can get rid of ctrl->column, BTW.
-Scott