omap2420-h4: Fix booting from NOR flash

The omap2420-h4 board is using a RAM based address as the linker
location for code. This is causing several problems when attempting
to run the latest u-boot code base on this board from flash. Update
the default linker location for code to be in NOR flash. Please note
that OMAP maps the NOR flash to address 0x08000000 by default and so
use this as the default address for the NOR flash.

Also remove legacy code that attempts to calculate where in flash the
sdata structure, that holds the memory interface configuration data,
is located. By changing the default linker location for code to flash
this is no longer necessary.

Signed-off-by: Jon Hunter <jon-hunter@ti.com>

arch/arm/include/asm/arch-omap24xx/omap2420.h

@@ -212,9 +212,9 @@
 # define H4_CS1_BASE           0x04000000  /* debug board */
 # define H4_CS2_BASE           0x0A000000  /* wifi board */
 #else
-# define H4_CS0_BASE           0x04000000  /* flash (64 Meg aligned) */
-# define H4_CS1_BASE           0x08000000  /* debug board */
-# define H4_CS2_BASE           0x0A000000  /* wifi board */
+# define H4_CS0_BASE           0x08000000  /* flash (64 Meg aligned) */
+# define H4_CS1_BASE           0x04000000  /* debug board */
+# define H4_CS2_BASE           0x0C000000  /* wifi board */
 #endif
 
 /* base address for indirect vectors (internal boot mode) */

board/ti/omap2420h4/config.mk

@@ -14,7 +14,7 @@
 # (mem base + reserved)
 
 # For use with external or internal boots.
-CONFIG_SYS_TEXT_BASE = 0x80e80000
+#CONFIG_SYS_TEXT_BASE = 0x80e80000
 
 # Used with full SRAM boot.
 # This is either with a GP system or a signed boot image.
@@ -24,5 +24,5 @@ CONFIG_SYS_TEXT_BASE = 0x80e80000
 
 # Handy to get symbols to debug ROM version.
 #CONFIG_SYS_TEXT_BASE = 0x0
-#CONFIG_SYS_TEXT_BASE = 0x08000000
+CONFIG_SYS_TEXT_BASE = 0x08000000
 #CONFIG_SYS_TEXT_BASE = 0x04000000

board/ti/omap2420h4/mem.c

@@ -200,19 +200,6 @@ void do_sdrc_init(u32 offset, u32 early)
 
 	__asm__ __volatile__("": : :"memory");  /* limit compiler scope */
 
-	/* u-boot is compiled to run in DDR or SRAM at 8xxxxxxx or 4xxxxxxx.
-	 * If we are running in flash prior to relocation and we use data
-	 * here which is not pc relative we need to get the address correct.
-	 * We need to find the current flash mapping to dress up the initial
-	 * pointer load.  As long as this is const data we should be ok.
-	 */
-	if((early) && running_in_flash()){
-		sdata = (sdrc_data_t *)(((u32)sdata & 0x0003FFFF) | get_gpmc0_base());
-		/* NOR internal boot offset is 0x4000 from xloader signature */
-		if(running_from_internal_boot())
-			sdata = (sdrc_data_t *)((u32)sdata + 0x4000);
-	}
-
 	if (!early && (((mtype = get_mem_type()) == DDR_COMBO)||(mtype == DDR_STACKED))) {
 		if(mtype == DDR_COMBO){
 			pmask = BIT2;/* combo part has a shared CKE signal, can't use feature */

include/configs/omap2420h4.h

@@ -220,7 +220,7 @@
 #define CONFIG_ENV_IS_IN_NAND	1
 #define CONFIG_ENV_OFFSET	0x80000	/* environment starts here  */
 #else
-#define CONFIG_ENV_ADDR             (CONFIG_SYS_FLASH_BASE + SZ_128K)
+#define CONFIG_ENV_ADDR             (CONFIG_SYS_FLASH_BASE + SZ_256K)
 #define	CONFIG_ENV_IS_IN_FLASH      1
 #define CONFIG_ENV_SECT_SIZE	PHYS_FLASH_SECT_SIZE
 #define CONFIG_ENV_OFFSET	( CONFIG_SYS_MONITOR_BASE + CONFIG_SYS_MONITOR_LEN ) /* Environment after Monitor */