spl, nand: add 4bit HW ecc oob first nand_read_page function
similiar to commit dc7cd8e59ba077f3b4c1a4557c9cd86a31b9ab1f, only
adapted for the new spl framework.
Signed-off-by: Heiko Schocher <hs@denx.de>
Acked-by: Tom Rini <trini@ti.com>
Acked-by: Scott Wood <scottwood@freescale.com>
Cc: Albert ARIBAUD <albert.u.boot@aribaud.net>
Cc: Sandeep Paulraj <s-paulraj@ti.com>
Signed-off-by: Sandeep Paulraj <s-paulraj@ti.com>
diff --git a/README b/README
index 46f062f..caebc22 100644
--- a/README
+++ b/README
@@ -3257,6 +3257,11 @@
that is executed before the actual U-Boot. E.g. when
compiling a NAND SPL.
+- CONFIG_SYS_NAND_HW_ECC_OOBFIRST
+ define this, if you want to read first the oob data
+ and then the data. This is used for example on
+ davinci plattforms.
+
- CONFIG_USE_ARCH_MEMCPY
CONFIG_USE_ARCH_MEMSET
If these options are used a optimized version of memcpy/memset will
diff --git a/drivers/mtd/nand/nand_spl_simple.c b/drivers/mtd/nand/nand_spl_simple.c
index 71491d4..e5003e6 100644
--- a/drivers/mtd/nand/nand_spl_simple.c
+++ b/drivers/mtd/nand/nand_spl_simple.c
@@ -140,6 +140,47 @@
return 0;
}
+#if defined(CONFIG_SYS_NAND_HW_ECC_OOBFIRST)
+static int nand_read_page(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(block, page, 0, NAND_CMD_READOOB);
+ this->read_buf(&mtd, oob_data, CONFIG_SYS_NAND_OOBSIZE);
+ nand_command(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(int block, int page, void *dst)
{
struct nand_chip *this = mtd.priv;
@@ -186,6 +227,7 @@
return 0;
}
+#endif
int nand_spl_load_image(uint32_t offs, unsigned int size, void *dst)
{
@@ -230,7 +272,6 @@
mtd.priv = &nand_chip;
nand_chip.IO_ADDR_R = nand_chip.IO_ADDR_W =
(void __iomem *)CONFIG_SYS_NAND_BASE;
- nand_chip.options = 0;
board_nand_init(&nand_chip);
if (nand_chip.select_chip)