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>

board/atmel/at91cap9adk/at91cap9adk.c

@@ -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;
 }
 

board/atmel/at91cap9adk/nand.c

@@ -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;
 

include/configs/at91cap9adk.h

@@ -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