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authorNick Thompson <nick.thompson@gefanuc.com>2009-12-12 12:12:26 -0500
committerTom Rix <Tom.Rix@windriver.com>2010-01-04 08:48:17 -0600
commit97f4eb8cfb97c7c5b158e3c0df4611efbf50f403 (patch)
tree61fc8af5589184dd825d70659b7e5c8491e369d3 /drivers/mtd
parent90110e0eab5ac6ab714109ce1fd8873c858dd552 (diff)
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Davinci: Configurable NAND chip selects
Davinci: Configurable NAND chip selects Add a CONFIG_SYS_NAND_CS setting to all davinci configs and use it to setup the NAND controller in the davinci_nand mtd driver. Signed-off-by: Nick Thompson <nick.thompson@gefanuc.com>
Diffstat (limited to 'drivers/mtd')
-rw-r--r--drivers/mtd/nand/davinci_nand.c25
1 files changed, 11 insertions, 14 deletions
diff --git a/drivers/mtd/nand/davinci_nand.c b/drivers/mtd/nand/davinci_nand.c
index 41a9568..1ad802a 100644
--- a/drivers/mtd/nand/davinci_nand.c
+++ b/drivers/mtd/nand/davinci_nand.c
@@ -82,26 +82,20 @@ static void nand_davinci_hwcontrol(struct mtd_info *mtd, int cmd, unsigned int c
static void nand_davinci_enable_hwecc(struct mtd_info *mtd, int mode)
{
- int dummy;
+ u_int32_t val;
- dummy = emif_regs->NANDF1ECC;
+ (void)readl(&(emif_regs->NANDFECC[CONFIG_SYS_NAND_CS - 2]));
- /* FIXME: only chipselect 0 is supported for now */
- emif_regs->NANDFCR |= 1 << 8;
+ val = readl(&emif_regs->NANDFCR);
+ val |= DAVINCI_NANDFCR_1BIT_ECC_START(CONFIG_SYS_NAND_CS);
+ writel(val, &emif_regs->NANDFCR);
}
static u_int32_t nand_davinci_readecc(struct mtd_info *mtd, u_int32_t region)
{
u_int32_t ecc = 0;
- if (region == 1)
- ecc = emif_regs->NANDF1ECC;
- else if (region == 2)
- ecc = emif_regs->NANDF2ECC;
- else if (region == 3)
- ecc = emif_regs->NANDF3ECC;
- else if (region == 4)
- ecc = emif_regs->NANDF4ECC;
+ ecc = readl(&(emif_regs->NANDFECC[region - 1]));
return(ecc);
}
@@ -223,8 +217,11 @@ static void nand_davinci_4bit_enable_hwecc(struct mtd_info *mtd, int mode)
* Start a new ECC calculation for reading or writing 512 bytes
* of data.
*/
- val = (emif_regs->NANDFCR & ~(3 << 4)) | (1 << 12);
- emif_regs->NANDFCR = val;
+ val = readl(&emif_regs->NANDFCR);
+ val &= ~DAVINCI_NANDFCR_4BIT_ECC_SEL_MASK;
+ val |= DAVINCI_NANDFCR_4BIT_ECC_SEL(CONFIG_SYS_NAND_CS);
+ val |= DAVINCI_NANDFCR_4BIT_ECC_START;
+ writel(val, &emif_regs->NANDFCR);
break;
case NAND_ECC_READSYN:
val = emif_regs->NAND4BITECC1;