diff options
| author | Kyungmin Park <kyungmin.park@samsung.com> | 2006-09-25 23:53:28 +0000 |
|---|---|---|
| committer | David Woodhouse <dwmw2@infradead.org> | 2006-09-26 09:16:06 +0100 |
| commit | 47e777e02e7b21eaa4686a70069c9583c126aea8 (patch) | |
| tree | cddb443020bec7625029d75030504bf5d295a924 | |
| parent | b77d95c78fb0ec330cd53e0d297ffa4fd2975e32 (diff) | |
[MTD ONENAND] Fix OneNAND probe
- fix OneNAND probe whether OneNAND Sync. Burst read mode or not
- fix OneNAND reset wait problem
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
| -rw-r--r-- | drivers/mtd/onenand/onenand_base.c | 17 |
1 files changed, 14 insertions, 3 deletions
diff --git a/drivers/mtd/onenand/onenand_base.c b/drivers/mtd/onenand/onenand_base.c index 84ec40d2543..09aefe2164a 100644 --- a/drivers/mtd/onenand/onenand_base.c +++ b/drivers/mtd/onenand/onenand_base.c @@ -1628,6 +1628,12 @@ static int onenand_probe(struct mtd_info *mtd) int bram_maf_id, bram_dev_id, maf_id, dev_id; int version_id; int density; + int syscfg; + + /* Save system configuration 1 */ + syscfg = this->read_word(this->base + ONENAND_REG_SYS_CFG1); + /* Clear Sync. Burst Read mode to read BootRAM */ + this->write_word((syscfg & ~ONENAND_SYS_CFG1_SYNC_READ), this->base + ONENAND_REG_SYS_CFG1); /* Send the command for reading device ID from BootRAM */ this->write_word(ONENAND_CMD_READID, this->base + ONENAND_BOOTRAM); @@ -1636,13 +1642,18 @@ static int onenand_probe(struct mtd_info *mtd) bram_maf_id = this->read_word(this->base + ONENAND_BOOTRAM + 0x0); bram_dev_id = this->read_word(this->base + ONENAND_BOOTRAM + 0x2); + /* Reset OneNAND to read default register values */ + this->write_word(ONENAND_CMD_RESET, this->base + ONENAND_BOOTRAM); + /* Wait reset */ + this->wait(mtd, FL_RESETING); + + /* Restore system configuration 1 */ + this->write_word(syscfg, this->base + ONENAND_REG_SYS_CFG1); + /* Check manufacturer ID */ if (onenand_check_maf(bram_maf_id)) return -ENXIO; - /* Reset OneNAND to read default register values */ - this->write_word(ONENAND_CMD_RESET, this->base + ONENAND_BOOTRAM); - /* Read manufacturer and device IDs from Register */ maf_id = this->read_word(this->base + ONENAND_REG_MANUFACTURER_ID); dev_id = this->read_word(this->base + ONENAND_REG_DEVICE_ID); |