From mboxrd@z Thu Jan 1 00:00:00 1970 From: Heiko Schocher Date: Wed, 1 Oct 2014 07:54:50 +0200 Subject: [U-Boot] [PATCH v1 06/10] spl, nand, atmel_nand: add erase one block function In-Reply-To: <1412142894-997-1-git-send-email-hs@denx.de> References: <1412142894-997-1-git-send-email-hs@denx.de> Message-ID: <1412142894-997-7-git-send-email-hs@denx.de> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: u-boot@lists.denx.de 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 Cc: Andreas Bie?mann Cc: Bo Shen Cc: Scott Wood Cc: Josh Wu --- drivers/mtd/nand/atmel_nand.c | 33 +++++++++++++++++++++++++++++++++ include/linux/mtd/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..276d820 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 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/linux/mtd/nand.h b/include/linux/mtd/nand.h index 8438490..ee2c3fe 100644 --- a/include/linux/mtd/nand.h +++ b/include/linux/mtd/nand.h @@ -1020,5 +1020,6 @@ void nand_write_buf16(struct mtd_info *mtd, const uint8_t *buf, int len); void nand_read_buf(struct mtd_info *mtd, uint8_t *buf, int len); void nand_read_buf16(struct mtd_info *mtd, uint8_t *buf, int len); uint8_t nand_read_byte(struct mtd_info *mtd); +int nand_erase_one(int block, int page); #endif #endif /* __LINUX_MTD_NAND_H */ -- 1.8.3.1