Patchwork [U-Boot,8/9] spl, nand: add 4bit HW ecc oob first nand_read_page function

login
register
mail settings
Submitter Heiko Schocher
Date July 16, 2011, 10:06 a.m.
Message ID <1310810810-5322-9-git-send-email-hs@denx.de>
Download mbox | patch
Permalink /patch/104949/
State Accepted
Commit dc7cd8e59ba077f3b4c1a4557c9cd86a31b9ab1f
Headers show

Comments

Heiko Schocher - July 16, 2011, 10:06 a.m.
Signed-off-by: Heiko Schocher <hs@denx.de>
cc: Scott Wood <scottwood@freescale.com>
---
 nand_spl/nand_boot.c |   42 ++++++++++++++++++++++++++++++++++++++++++
 1 files changed, 42 insertions(+), 0 deletions(-)
Scott Wood - Aug. 2, 2011, 8:49 p.m.
On Sat, Jul 16, 2011 at 12:06:49AM -0000, Heiko Schocher wrote:
> Signed-off-by: Heiko Schocher <hs@denx.de>
> cc: Scott Wood <scottwood@freescale.com>
> 
> ---
> nand_spl/nand_boot.c |   42 ++++++++++++++++++++++++++++++++++++++++++
>  1 files changed, 42 insertions(+), 0 deletions(-)

Applied to u-boot-nand-flash next

-Scott

Patch

diff --git a/nand_spl/nand_boot.c b/nand_spl/nand_boot.c
index 4683c7c..615ef25 100644
--- a/nand_spl/nand_boot.c
+++ b/nand_spl/nand_boot.c
@@ -135,6 +135,47 @@  static int nand_is_bad_block(struct mtd_info *mtd, int block)
 	return 0;
 }
 
+#if defined(CONFIG_SYS_NAND_4BIT_HW_ECC_OOBFIRST)
+static int nand_read_page(struct mtd_info *mtd, int block, int page, uchar *dst)
+{
+	struct nand_chip *this = mtd->priv;
+	u_char *ecc_calc;
+	u_char *ecc_code;
+	u_char *oob_data;
+	int i;
+	int eccsize = CONFIG_SYS_NAND_ECCSIZE;
+	int eccbytes = CONFIG_SYS_NAND_ECCBYTES;
+	int eccsteps = CONFIG_SYS_NAND_ECCSTEPS;
+	uint8_t *p = dst;
+	int stat;
+
+	/*
+	 * No malloc available for now, just use some temporary locations
+	 * in SDRAM
+	 */
+	ecc_calc = (u_char *)(CONFIG_SYS_SDRAM_BASE + 0x10000);
+	ecc_code = ecc_calc + 0x100;
+	oob_data = ecc_calc + 0x200;
+
+	nand_command(mtd, block, page, 0, NAND_CMD_READOOB);
+	this->read_buf(mtd, oob_data, CONFIG_SYS_NAND_OOBSIZE);
+	nand_command(mtd, block, page, 0, NAND_CMD_READ0);
+
+	/* Pick the ECC bytes out of the oob data */
+	for (i = 0; i < CONFIG_SYS_NAND_ECCTOTAL; i++)
+		ecc_code[i] = oob_data[nand_ecc_pos[i]];
+
+
+	for (i = 0; eccsteps; eccsteps--, i += eccbytes, p += eccsize) {
+		this->ecc.hwctl(mtd, NAND_ECC_READ);
+		this->read_buf(mtd, p, eccsize);
+		this->ecc.calculate(mtd, p, &ecc_calc[i]);
+		stat = this->ecc.correct(mtd, p, &ecc_code[i], &ecc_calc[i]);
+	}
+
+	return 0;
+}
+#else
 static int nand_read_page(struct mtd_info *mtd, int block, int page, uchar *dst)
 {
 	struct nand_chip *this = mtd->priv;
@@ -181,6 +222,7 @@  static int nand_read_page(struct mtd_info *mtd, int block, int page, uchar *dst)
 
 	return 0;
 }
+#endif /* #if defined(CONFIG_SYS_NAND_4BIT_HW_ECC_OOBFIRST) */
 
 static int nand_load(struct mtd_info *mtd, unsigned int offs,
 		     unsigned int uboot_size, uchar *dst)