TI DaVinci: DM355: Config Cleanup and Update

This patch does the following
1) Enables the NAND driver which is now available.
2) Enables the 'CONFIG_MTD_DEVICE' as without this the
compilation will fail
3) We now have a safe place to store environment and defines
an offset where this can be stored. This offset value is such that it is after
the location where U-Boot is flashed using TI flash utilities.
4) Enables Bootdelay
5) Increases malloc() arena size. Manufacturers are coming out with
NAND with large blocks sizes of upto 1 MiB. It has been noticed that
as the block size of the NAND used is increased, if this particular
value is not increased, the NAND driver will output out of memory
errors.

Signed-off-by: Sandeep Paulraj <s-paulraj@ti.com>

include/configs/davinci_dm355evm.h

@@ -65,9 +65,10 @@
 #define CONFIG_SYS_I2C_SLAVE		0x10	/* SMBus host address */
 
 /* NAND: socketed, two chipselects, normally 2 GBytes */
-/* NYET -- #define CONFIG_NAND_DAVINCI */
-#define CONFIG_SYS_NAND_HW_ECC
+#define CONFIG_NAND_DAVINCI
 #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_LARGEPAGE
 #define CONFIG_SYS_NAND_BASE_LIST	{ 0x02000000, }
@@ -95,15 +96,12 @@
 #ifdef CONFIG_NAND_DAVINCI
 #define CONFIG_CMD_MTDPARTS
 #define CONFIG_MTD_PARTITIONS
+#define CONFIG_MTD_DEVICE
 #define CONFIG_CMD_NAND
 #define CONFIG_CMD_UBI
 #define CONFIG_RBTREE
 #endif
 
-/* TEMPORARY -- no safe place to save env, yet */
-#define CONFIG_ENV_IS_NOWHERE
-#undef CONFIG_CMD_SAVEENV
-
 #ifdef CONFIG_USB_DAVINCI
 #define CONFIG_MUSB_HCD
 #define CONFIG_CMD_USB
@@ -129,9 +127,14 @@
 #define CONFIG_SYS_PROMPT_HUSH_PS2	"> "
 #define CONFIG_SYS_LONGHELP
 
-#define CONFIG_ENV_SIZE		(16 << 10)	/* 16 KiB */
+#ifdef CONFIG_NAND_DAVINCI
+#define CONFIG_ENV_SIZE		(256 << 10)	/* 256 KiB */
+#define CONFIG_ENV_IS_IN_NAND
+#define CONFIG_ENV_OFFSET	0x3C0000
+#undef CONFIG_ENV_IS_IN_FLASH
+#endif
 
-/* NYET -- #define CONFIG_BOOTDELAY	5 */
+#define CONFIG_BOOTDELAY	5
 #define CONFIG_BOOTCOMMAND \
 		"dhcp;bootm"
 #define CONFIG_BOOTARGS \
@@ -146,7 +149,7 @@
 
 /* U-Boot memory configuration */
 #define CONFIG_STACKSIZE		(256 << 10)	/* 256 KiB */
-#define CONFIG_SYS_MALLOC_LEN		(512 << 10)	/* 512 KiB */
+#define CONFIG_SYS_MALLOC_LEN		(1 << 20)	/* 1 MiB */
 #define CONFIG_SYS_GBL_DATA_SIZE	128		/* for initial data */
 #define CONFIG_SYS_MEMTEST_START	0x87000000	/* physical address */
 #define CONFIG_SYS_MEMTEST_END		0x88000000	/* test 16MB RAM */