From 47e777e02e7b21eaa4686a70069c9583c126aea8 Mon Sep 17 00:00:00 2001 From: Kyungmin Park Date: Mon, 25 Sep 2006 23:53:28 +0000 Subject: [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 Signed-off-by: David Woodhouse --- drivers/mtd/onenand/onenand_base.c | 17 ++++++++++++++--- 1 file changed, 14 insertions(+), 3 deletions(-) (limited to 'drivers/mtd') diff --git a/drivers/mtd/onenand/onenand_base.c b/drivers/mtd/onenand/onenand_base.c index 84ec40d25438..09aefe2164aa 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); -- cgit v1.2.3