diff options
| author | Joe Hershberger <joe.hershberger@ni.com> | 2012-11-05 06:46:31 +0000 |
|---|---|---|
| committer | Scott Wood <scottwood@freescale.com> | 2012-11-26 15:41:28 -0600 |
| commit | c788ecfdc3eb577757ffc1bfb8416added07ef33 (patch) | |
| tree | 0e7c20915cd081937f0b504b102e744d48c2bd5c /drivers | |
| parent | 79da5e3d5d6be28d1c82265bbeb0ff4633fc5535 (diff) | |
nand: Move the sub-page read support enable to a flag
Use a flag instead of a hard-coded macro so that sub-page reads can be
enabled in other cases (such as on-die ecc).
This is the same as a5ff4f102937a3492bca4a9ff0c341d78813414c in Linux
Signed-off-by: Joe Hershberger <joe.hershberger@ni.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/mtd/nand/nand_base.c | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/drivers/mtd/nand/nand_base.c b/drivers/mtd/nand/nand_base.c index d3b71a50adc..a2d06be99fc 100644 --- a/drivers/mtd/nand/nand_base.c +++ b/drivers/mtd/nand/nand_base.c @@ -1245,7 +1245,8 @@ static int nand_do_read_ops(struct mtd_info *mtd, loff_t from, if (unlikely(ops->mode == MTD_OOB_RAW)) ret = chip->ecc.read_page_raw(mtd, chip, bufpoi, page); - else if (!aligned && NAND_SUBPAGE_READ(chip) && !oob) + else if (!aligned && NAND_HAS_SUBPAGE_READ(chip) && + !oob) ret = chip->ecc.read_subpage(mtd, chip, col, bytes, bufpoi); else @@ -1256,7 +1257,7 @@ static int nand_do_read_ops(struct mtd_info *mtd, loff_t from, /* Transfer not aligned data */ if (!aligned) { - if (!NAND_SUBPAGE_READ(chip) && !oob && + if (!NAND_HAS_SUBPAGE_READ(chip) && !oob && !(mtd->ecc_stats.failed - stats.failed)) chip->pagebuf = realpage; memcpy(buf, chip->buffers->databuf + col, bytes); @@ -3150,6 +3151,10 @@ int nand_scan_tail(struct mtd_info *mtd) /* Invalidate the pagebuffer reference */ chip->pagebuf = -1; + /* Large page NAND with SOFT_ECC should support subpage reads */ + if ((chip->ecc.mode == NAND_ECC_SOFT) && (chip->page_shift > 9)) + chip->options |= NAND_SUBPAGE_READ; + /* Fill in remaining MTD driver data */ mtd->type = MTD_NANDFLASH; mtd->flags = (chip->options & NAND_ROM) ? MTD_CAP_ROM : |