da830: add support for NAND boot mode

Add support for enabling NAND boot mode in configuration file and
add correspanding pinmux support, nand initialize function in board file.
The size required for environment variables not more than 10KB
the CONFIG_ENV_SIZE is set to 10KB from (512 << 10).

Acked-by: Nick Thompson <nick.thompson@ge.com>
Signed-off-by: Sudhakar Rajashekhara <sudhakar.raj@ti.com>
Signed-off-by: Manjunath Hadli <manjunath.hadli@ti.com>
Signed-off-by: Sandeep Paulraj <s-paulraj@ti.com>

board/davinci/da8xxevm/da830evm.c

@@ -40,6 +40,8 @@
 #include <asm/arch/emif_defs.h>
 #include <asm/arch/emac_defs.h>
 #include <asm/io.h>
+#include <nand.h>
+#include <asm/arch/nand_defs.h>
 #include <asm/arch/davinci_misc.h>
 
 DECLARE_GLOBAL_DATA_PTR;
@@ -98,6 +100,56 @@ static const struct pinmux_config i2c_pins[] = {
 	{ pinmux(8), 2, 4 }
 };
 
+#ifdef CONFIG_USE_NAND
+/* NAND pin muxer settings */
+const struct pinmux_config aemif_pins[] = {
+	{ pinmux(13), 1, 6 },
+	{ pinmux(13), 1, 7 },
+	{ pinmux(14), 1, 0 },
+	{ pinmux(14), 1, 1 },
+	{ pinmux(14), 1, 2 },
+	{ pinmux(14), 1, 3 },
+	{ pinmux(14), 1, 4 },
+	{ pinmux(14), 1, 5 },
+	{ pinmux(14), 1, 6 },
+	{ pinmux(14), 1, 7 },
+	{ pinmux(15), 1, 0 },
+	{ pinmux(15), 1, 1 },
+	{ pinmux(15), 1, 2 },
+	{ pinmux(15), 1, 3 },
+	{ pinmux(15), 1, 4 },
+	{ pinmux(15), 1, 5 },
+	{ pinmux(15), 1, 6 },
+	{ pinmux(15), 1, 7 },
+	{ pinmux(16), 1, 0 },
+	{ pinmux(16), 1, 1 },
+	{ pinmux(16), 1, 2 },
+	{ pinmux(16), 1, 3 },
+	{ pinmux(16), 1, 4 },
+	{ pinmux(16), 1, 5 },
+	{ pinmux(16), 1, 6 },
+	{ pinmux(16), 1, 7 },
+	{ pinmux(17), 1, 0 },
+	{ pinmux(17), 1, 1 },
+	{ pinmux(17), 1, 2 },
+	{ pinmux(17), 1, 3 },
+	{ pinmux(17), 1, 4 },
+	{ pinmux(17), 1, 5 },
+	{ pinmux(17), 1, 6 },
+	{ pinmux(17), 1, 7 },
+	{ pinmux(18), 1, 0 },
+	{ pinmux(18), 1, 1 },
+	{ pinmux(18), 1, 2 },
+	{ pinmux(18), 1, 3 },
+	{ pinmux(18), 1, 4 },
+	{ pinmux(18), 1, 5 },
+	{ pinmux(18), 1, 6 },
+	{ pinmux(18), 1, 7 },
+	{ pinmux(10), 1, 0 }
+};
+#endif
+
+
 /* USB0_DRVVBUS pin muxer settings */
 static const struct pinmux_config usb_pins[] = {
 	{ pinmux(9), 1, 1 }
@@ -114,6 +166,7 @@ static const struct pinmux_resource pinmuxes[] = {
 #endif
 #ifdef CONFIG_USE_NAND
 	PINMUX_ITEM(emifa_nand_pins),
+	PINMUX_ITEM(aemif_pins),
 #endif
 #if defined(CONFIG_DRIVER_TI_EMAC)
 	PINMUX_ITEM(emac_pins),
@@ -184,6 +237,16 @@ int board_init(void)
 	return(0);
 }
 
+
+#ifdef CONFIG_NAND_DAVINCI
+int board_nand_init(struct nand_chip *nand)
+{
+	davinci_nand_init(nand);
+
+	return 0;
+}
+#endif
+
 #if defined(CONFIG_DRIVER_TI_EMAC)
 
 #define PHY_SW_I2C_ADDR	0x5f /* Address of PHY on i2c bus */

include/configs/da830evm.h

@@ -105,8 +105,10 @@
 #define CONFIG_SYS_NO_FLASH
 #define CONFIG_ENV_IS_IN_NAND		/* U-Boot env in NAND Flash  */
 #define CONFIG_ENV_OFFSET		(512 << 10)
-#define CONFIG_ENV_SIZE			(512 << 10)
+#define CONFIG_ENV_SIZE			(10 << 10) /* 10KB */
+#define CONFIG_SYS_NAND_USE_FLASH_BBT
 #define CONFIG_SYS_NAND_4BIT_HW_ECC_OOBFIRST
+#define CONFIG_SYS_NAND_PAGE_2K
 #define CONFIG_SYS_NAND_CS		3
 #define CONFIG_SYS_NAND_BASE		DAVINCI_ASYNC_EMIF_DATA_CE3_BASE
 #define CONFIG_SYS_NAND_PAGE_2K