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AT91CAP9ADK: 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 20:52:14 +02:00 committed by Jean-Christophe PLAGNIOL-VILLARD
parent 11b162bae0
commit 1c90df3e14
3 changed files with 10 additions and 2 deletions
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8
board/atmel/at91cap9adk/at91cap9adk.c
View File

@ -116,7 +116,12 @@ static void at91cap9_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_(1));
#ifdef CFG_NAND_DBW_16
AT91_SMC_DBW_16 |
#else /* CFG_NAND_DBW_8 */
AT91_SMC_DBW_8 |
#endif
AT91_SMC_TDF_(1));
at91_sys_write(AT91_PMC_PCER, 1 << AT91CAP9_ID_PIOABCD);
@ -252,7 +257,6 @@ int board_init(void)
#ifdef CONFIG_USB_OHCI_NEW
at91cap9_uhp_hw_init();
#endif
return 0;
}

3
board/atmel/at91cap9adk/nand.c
View File

@ -63,6 +63,9 @@ static void at91cap9adk_nand_hwcontrol(struct mtd_info *mtd, int cmd)
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 = at91cap9adk_nand_hwcontrol;
nand->chip_delay = 20;

1
include/configs/at91cap9adk.h
View File

@ -110,6 +110,7 @@
#define NAND_MAX_CHIPS 1
#define CFG_MAX_NAND_DEVICE 1
#define CFG_NAND_BASE 0x40000000
#define CFG_NAND_DBW_8 1
/* Ethernet */
#define CONFIG_MACB 1