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[AT9SAM] implement different ECC modes for NAND chips 

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
This commit is contained in:
Sascha Hauer 2008-10-31 14:04:42 +01:00
parent c3fc1364d9
commit 87d4b9ec09
3 changed files with 22 additions and 6 deletions
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17
board/at91sam9260ek/init.c
View File

@ -44,6 +44,8 @@ static struct atmel_nand_data nand_pdata = {
.ale = 21,
.cle = 22,
/* .det_pin = ... not connected */
.ecc_base = (void __iomem *)AT91C_BASE_HECC,
.ecc_mode = NAND_ECC_HW,
.rdy_pin = NAND_READY_GPIO,
.enable_pin = NAND_ENABLE_GPIO,
#if defined(CONFIG_MTD_NAND_ATMEL_BUSWIDTH_16)
@ -86,15 +88,26 @@ static struct device_d macb_dev = {
static int at91sam9260ek_devices_init(void)
{
struct device_d *nand, *dev;
register_device(&sdram_dev);
gpio_direction_input(NAND_READY_GPIO);
gpio_direction_output(NAND_ENABLE_GPIO, 1);
register_device(&nand_dev);
register_device(&macb_dev);
armlinux_set_bootparams((void *)0x20000100);
armlinux_set_architecture(MACH_TYPE_AT91SAM9260EK);
gpio_direction_input(NAND_READY_GPIO);
gpio_direction_output(NAND_ENABLE_GPIO, 1);
nand = get_device_by_path("/dev/nand0");
dev = dev_add_partition(nand, 0x00000, 0x80000, PARTITION_FIXED, "self_raw");
dev_add_bb_dev(dev, "self0");
dev = dev_add_partition(nand, 0x40000, 0x40000, PARTITION_FIXED, "env_raw");
dev_add_bb_dev(dev, "env0");
dev_add_partition(nand, 0x00000, 0x80000, PARTITION_FIXED, "self");
dev_add_partition(nand, 0x40000, 0x40000, PARTITION_FIXED, "env");
return 0;
}

10
drivers/nand/atmel_nand.c
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@ -399,10 +399,12 @@ static int __init atmel_nand_probe(struct device_d *dev)
if (host->board->rdy_pin)
nand_chip->dev_ready = atmel_nand_device_ready;
nand_chip->ecc.mode = NAND_ECC_SOFT; /* enable ECC */
if (no_ecc)
nand_chip->ecc.mode = NAND_ECC_NONE;
if (hard_ecc && pdata->ecc_base) {
nand_chip->ecc.mode = pdata->ecc_mode;
if (pdata->ecc_mode == NAND_ECC_HW) {
if (!pdata->ecc_base)
return -ENODEV;
host->ecc = pdata->ecc_base;
nand_chip->ecc.mode = NAND_ECC_HW;

1
include/asm-arm/arch-at91sam9/atmel_nand.h
View File

@ -14,6 +14,7 @@ struct atmel_nand_data {
u8 ale; /* address line number connected to ALE */
u8 cle; /* address line number connected to CLE */
u8 bus_width_16; /* buswidth is 16 bit */
u8 ecc_mode; /* NAND_ECC_* */
};
#endif /* __ASM_ARCH_NAND_H */