From 4dfd36058955550d4a82787a3d2e548faf404f73 Mon Sep 17 00:00:00 2001 From: Heiko Schocher Date: Fri, 31 Oct 2014 08:31:02 +0100 Subject: [PATCH] spl, nand, atmel_nand: add erase one block function MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit 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 Acked-by: Scott Wood Reviewed-by: Bo Shen Reviewed-by: Andreas Bießmann Signed-off-by: Andreas Bießmann --- drivers/mtd/nand/atmel_nand.c | 33 +++++++++++++++++++++++++++++++++ include/nand.h | 1 + 2 files changed, 34 insertions(+) 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) { diff --git a/include/nand.h b/include/nand.h index fc735d1..15e31ab 100644 --- a/include/nand.h +++ b/include/nand.h @@ -167,3 +167,4 @@ __attribute__((noreturn)) void nand_boot(void); #define ENV_OFFSET_SIZE 8 int get_nand_env_oob(nand_info_t *nand, unsigned long *result); #endif +int spl_nand_erase_one(int block, int page); -- 2.7.4