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nand_spl_simple: add support for software ECC

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This patch adds support for software ECC to the nand_spl_simple driver.
To enable this one have to define CONFIG_SPL_NAND_SOFTECC.

Tested on OMAP3.

Signed-off-by: Ilya Yanok <yanok@emcraft.com>
Acked-by: Scott Wood <scottwood@freescale.com>
This commit is contained in:
Ilya Yanok 2011-11-28 06:37:37 +00:00 committed by Albert ARIBAUD
parent ad2a7909a1
commit 1df308e5be
2 changed files with 11 additions and 2 deletions
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2
drivers/mtd/nand/nand_ecc.c
View File

@ -50,7 +50,7 @@
* only nand_correct_data() is needed
*/
#ifndef CONFIG_NAND_SPL
#if !defined(CONFIG_NAND_SPL) || defined(CONFIG_SPL_NAND_SOFTECC)
/*
* Pre-calculated 256-way 1 byte column parity
*/

11
drivers/mtd/nand/nand_spl_simple.c
View File

@ -21,6 +21,7 @@
#include <common.h>
#include <nand.h>
#include <asm/io.h>
#include <linux/mtd/nand_ecc.h>
static int nand_ecc_pos[] = CONFIG_SYS_NAND_ECCPOS;
static nand_info_t mtd;
@ -204,7 +205,8 @@ static int nand_read_page(int block, int page, void *dst)
oob_data = ecc_calc + 0x200;
for (i = 0; eccsteps; eccsteps--, i += eccbytes, p += eccsize) {
this->ecc.hwctl(&mtd, NAND_ECC_READ);
if (this->ecc.mode != NAND_ECC_SOFT)
this->ecc.hwctl(&mtd, NAND_ECC_READ);
this->read_buf(&mtd, p, eccsize);
this->ecc.calculate(&mtd, p, &ecc_calc[i]);
}
@ -274,6 +276,13 @@ void nand_init(void)
(void __iomem *)CONFIG_SYS_NAND_BASE;
board_nand_init(&nand_chip);
#ifdef CONFIG_SPL_NAND_SOFTECC
if (nand_chip.ecc.mode == NAND_ECC_SOFT) {
nand_chip.ecc.calculate = nand_calculate_ecc;
nand_chip.ecc.correct = nand_correct_data;
}
#endif
if (nand_chip.select_chip)
nand_chip.select_chip(&mtd, 0);
}