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Davinci: NAND enable ECC even when not in NAND boot mode

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Davinci: NAND enable ECC even when not in NAND boot mode

On Davinci platforms, the default NAND device is enabled (for ECC)
in low level boot code when NAND boot mode is used. If booting in
another mode, NAND ECC is not enabled. The driver should make
sure ECC is enabled regardless of boot mode if NAND is configured
in U-Boot.

Signed-off-by: Nick Thompson <nick.thompson@ge.com>
This commit is contained in:
Nick Thompson 2009-12-12 12:13:10 -05:00 committed by Tom Rix
parent 97f4eb8cfb
commit 26be2c53d6
2 changed files with 3 additions and 2 deletions
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2
drivers/mtd/nand/davinci_nand.c
View file

@ -87,6 +87,7 @@ static void nand_davinci_enable_hwecc(struct mtd_info *mtd, int mode)
(void)readl(&(emif_regs->NANDFECC[CONFIG_SYS_NAND_CS - 2]));
val = readl(&emif_regs->NANDFCR);
val |= DAVINCI_NANDFCR_NAND_ENABLE(CONFIG_SYS_NAND_CS);
val |= DAVINCI_NANDFCR_1BIT_ECC_START(CONFIG_SYS_NAND_CS);
writel(val, &emif_regs->NANDFCR);
}
@ -219,6 +220,7 @@ static void nand_davinci_4bit_enable_hwecc(struct mtd_info *mtd, int mode)
*/
val = readl(&emif_regs->NANDFCR);
val &= ~DAVINCI_NANDFCR_4BIT_ECC_SEL_MASK;
val |= DAVINCI_NANDFCR_NAND_ENABLE(CONFIG_SYS_NAND_CS);
val |= DAVINCI_NANDFCR_4BIT_ECC_SEL(CONFIG_SYS_NAND_CS);
val |= DAVINCI_NANDFCR_4BIT_ECC_START;
writel(val, &emif_regs->NANDFCR);

3
include/asm-arm/arch-davinci/emif_defs.h
View file

@ -66,11 +66,10 @@ typedef struct {
typedef emif_registers *emifregs;
#define DAVINCI_NANDFCR_NAND_ENABLE(n) (1 << (n-2))
#define DAVINCI_NANDFCR_4BIT_ECC_SEL_MASK (3 << 4)
#define DAVINCI_NANDFCR_4BIT_ECC_SEL(n) ((n-2) << 4)
#define DAVINCI_NANDFCR_1BIT_ECC_START(n) (1 << (8 + (n-2)))
#define DAVINCI_NANDFCR_4BIT_ECC_START (1 << 12)
#define DAVINCI_NANDFCR_4BIT_CALC_START (1 << 13)