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 <h...@denx.de>
Cc: Andreas Bießmann <andreas.de...@googlemail.com>
Cc: Bo Shen <voice.s...@atmel.com>
Cc: Scott Wood <scottw...@freescale.com>
Cc: Josh Wu <josh...@atmel.com>
---
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
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