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| author | Heiko Schocher <hs@denx.de> | 2014-10-31 08:31:02 +0100 |
|---|---|---|
| committer | Tom Rini <trini@ti.com> | 2014-11-17 08:47:17 -0500 |
| commit | 4dfd36058955550d4a82787a3d2e548faf404f73 (patch) | |
| tree | d5fff21d73eeb48420ef73a69607c1d402693747 /drivers/mtd/nand | |
| parent | c1ec4062825284d77552cedcaffe9cb08079d677 (diff) | |
| download | u-boot-imx-4dfd36058955550d4a82787a3d2e548faf404f73.zip u-boot-imx-4dfd36058955550d4a82787a3d2e548faf404f73.tar.gz u-boot-imx-4dfd36058955550d4a82787a3d2e548faf404f73.tar.bz2 | |
spl, nand, atmel_nand: add erase one block function
erase one nand block in spl code. keep it simple, as size matters
This is used on the upcoming taurus spl support.
Signed-off-by: Heiko Schocher <hs@denx.de>
Acked-by: Scott Wood <scottwood@freescale.com>
Reviewed-by: Bo Shen <voice.shen@atmel.com>
Reviewed-by: Andreas Bießmann <andreas.devel@googlemail.com>
Signed-off-by: Andreas Bießmann <andreas.devel@googlemail.com>
Diffstat (limited to 'drivers/mtd/nand')
| -rw-r--r-- | drivers/mtd/nand/atmel_nand.c | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/drivers/mtd/nand/atmel_nand.c b/drivers/mtd/nand/atmel_nand.c index d506e42..d6d6f85 100644 --- a/drivers/mtd/nand/atmel_nand.c +++ b/drivers/mtd/nand/atmel_nand.c @@ -1274,6 +1274,39 @@ static int nand_read_page(int block, int page, void *dst) return 0; } + +int spl_nand_erase_one(int block, int page) +{ + struct nand_chip *this = mtd.priv; + void (*hwctrl)(struct mtd_info *mtd, int cmd, + unsigned int ctrl) = this->cmd_ctrl; + int page_addr; + + if (nand_chip.select_chip) + nand_chip.select_chip(&mtd, 0); + + page_addr = page + block * CONFIG_SYS_NAND_PAGE_COUNT; + hwctrl(&mtd, NAND_CMD_ERASE1, NAND_CTRL_CLE | NAND_CTRL_CHANGE); + /* Row address */ + hwctrl(&mtd, (page_addr & 0xff), NAND_CTRL_ALE | NAND_CTRL_CHANGE); + hwctrl(&mtd, ((page_addr >> 8) & 0xff), + NAND_CTRL_ALE | NAND_CTRL_CHANGE); +#ifdef CONFIG_SYS_NAND_5_ADDR_CYCLE + /* One more address cycle for devices > 128MiB */ + hwctrl(&mtd, (page_addr >> 16) & 0x0f, + NAND_CTRL_ALE | NAND_CTRL_CHANGE); +#endif + + hwctrl(&mtd, NAND_CMD_ERASE2, NAND_CTRL_CLE | NAND_CTRL_CHANGE); + udelay(2000); + + while (!this->dev_ready(&mtd)) + ; + + nand_deselect(); + + return 0; +} #else static int nand_read_page(int block, int page, void *dst) { |