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| author | Kyungmin Park <kyungmin.park@samsung.com> | 2010-04-28 17:46:48 +0200 |
|---|---|---|
| committer | David Woodhouse <David.Woodhouse@intel.com> | 2010-05-14 01:50:21 +0100 |
| commit | c37cb56fb15d0f8e4180b19eed20f52fe8641b54 (patch) | |
| tree | 1eacdb56d59ca81e8e45562f0bbc5d64ceb1b467 /drivers/mtd | |
| parent | 3328dc315914aa6db486da2ceb021b6f0b36b877 (diff) | |
| download | linux-3.10-c37cb56fb15d0f8e4180b19eed20f52fe8641b54.tar.gz linux-3.10-c37cb56fb15d0f8e4180b19eed20f52fe8641b54.tar.bz2 linux-3.10-c37cb56fb15d0f8e4180b19eed20f52fe8641b54.zip | |
mtd: onenand: add workaround for SYNC_WRITE mode
Some chips fails to identify properly when SYNC_WRITE mode is enabled
(the example is OneNAND on S5PC110 SoC). This patch adds a workaround
for such chips.
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
Diffstat (limited to 'drivers/mtd')
| -rw-r--r-- | drivers/mtd/onenand/onenand_base.c | 12 |
1 files changed, 9 insertions, 3 deletions
diff --git a/drivers/mtd/onenand/onenand_base.c b/drivers/mtd/onenand/onenand_base.c index 9827ab779c0..26caf2590da 100644 --- a/drivers/mtd/onenand/onenand_base.c +++ b/drivers/mtd/onenand/onenand_base.c @@ -3763,6 +3763,12 @@ static int onenand_probe(struct mtd_info *mtd) /* Restore system configuration 1 */ this->write_word(syscfg, this->base + ONENAND_REG_SYS_CFG1); + /* Workaround */ + if (syscfg & ONENAND_SYS_CFG1_SYNC_WRITE) { + bram_maf_id = this->read_word(this->base + ONENAND_REG_MANUFACTURER_ID); + bram_dev_id = this->read_word(this->base + ONENAND_REG_DEVICE_ID); + } + /* Check manufacturer ID */ if (onenand_check_maf(bram_maf_id)) return -ENXIO; @@ -3782,6 +3788,9 @@ static int onenand_probe(struct mtd_info *mtd) this->device_id = dev_id; this->version_id = ver_id; + /* Check OneNAND features */ + onenand_check_features(mtd); + density = onenand_get_density(dev_id); if (FLEXONENAND(this)) { this->dies = ONENAND_IS_DDP(this) ? 2 : 1; @@ -3833,9 +3842,6 @@ static int onenand_probe(struct mtd_info *mtd) else mtd->size = this->chipsize; - /* Check OneNAND features */ - onenand_check_features(mtd); - /* * We emulate the 4KiB page and 256KiB erase block size * But oobsize is still 64 bytes. |