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AT91SAM9260EK: Handle 8 or 16 bit NAND 

The Atmel boards can handle 8 or 16 bit NAND memories. This patch
makes the support configurable in the board config header file
(CFG_NAND_DBW_8 or CFG_NAND_DBW_16).

Signed-off-by: Stelian Pop <stelian@popies.net>
Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
This commit is contained in:
Stelian Pop 2008-05-08 20:52:18 +02:00 committed by Jean-Christophe PLAGNIOL-VILLARD
parent ab52640fc0
commit c1212b2f5c
3 changed files with 10 additions and 1 deletions
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7
board/atmel/at91sam9260ek/at91sam9260ek.c
View File

@ -90,7 +90,12 @@ static void at91sam9260ek_nand_hw_init(void)
at91_sys_write(AT91_SMC_MODE(3),
AT91_SMC_READMODE | AT91_SMC_WRITEMODE |
AT91_SMC_EXNWMODE_DISABLE |
AT91_SMC_DBW_8 | AT91_SMC_TDF_(2));
#ifdef CFG_NAND_DBW_16
AT91_SMC_DBW_16 |
#else /* CFG_NAND_DBW_8 */
AT91_SMC_DBW_8 |
#endif
AT91_SMC_TDF_(2));
at91_sys_write(AT91_PMC_PCER, 1 << AT91SAM9260_ID_PIOC);

3
board/atmel/at91sam9260ek/nand.c
View File

@ -68,6 +68,9 @@ static int at91sam9260ek_nand_ready(struct mtd_info *mtd)
int board_nand_init(struct nand_chip *nand)
{
nand->eccmode = NAND_ECC_SOFT;
#ifdef CFG_NAND_DBW_16
nand->options = NAND_BUSWIDTH_16;
#endif
nand->hwcontrol = at91sam9260ek_nand_hwcontrol;
nand->dev_ready = at91sam9260ek_nand_ready;
nand->chip_delay = 20;

1
include/configs/at91sam9260ek.h
View File

@ -104,6 +104,7 @@
#define NAND_MAX_CHIPS 1
#define CFG_MAX_NAND_DEVICE 1
#define CFG_NAND_BASE 0x40000000
#define CFG_NAND_DBW_8 1
/* NOR flash - no real flash on this board */
#define CFG_NO_FLASH 1