[U-Boot] [PATCH 2/2] at91sam9261ek: make operational again

[Remy Bohmer]

Since U-boot v2010.12 the at91sam9261ek board is broken.
This is solved and tested on this board.

Note: It requires that the 1st stage bootloader (like Atmel at91-bootstrap)
to load U-boot at a different address compared to previous releases of
U-boot due to conflicts in the BSS area during relocation.
(0x23f00000 -> -0x23e00000)

Derived from a patch of: Alexander Stein <alexander.stein at systec-electronic.com>

Signed-off-by: Remy Bohmer <linux at bohmer.net>
---
 board/atmel/at91sam9261ek/Makefile        |   10 +++++-----
 board/atmel/at91sam9261ek/at91sam9261ek.c |    7 ++++---
 board/atmel/at91sam9261ek/config.mk       |    1 -
 include/configs/at91sam9261ek.h           |   25 +++++++++++++++++++++----
 4 files changed, 30 insertions(+), 13 deletions(-)
 delete mode 100644 board/atmel/at91sam9261ek/config.mk

diff --git a/board/atmel/at91sam9261ek/Makefile b/board/atmel/at91sam9261ek/Makefile
index 9d20ba0..1da810f 100644
--- a/board/atmel/at91sam9261ek/Makefile
+++ b/board/atmel/at91sam9261ek/Makefile
@@ -29,16 +29,16 @@ include $(TOPDIR)/config.mk
 
 LIB	= $(obj)lib$(BOARD).o
 
-COBJS-y += at91sam9261ek.o
+COBJS-y += $(BOARD).o
 COBJS-y += led.o
 COBJS-$(CONFIG_HAS_DATAFLASH) += partition.o
 
-SRCS	:= $(SOBJS:.o=.S) $(COBJS-y:.o=.c)
-OBJS	:= $(addprefix $(obj),$(COBJS-y))
-SOBJS	:= $(addprefix $(obj),$(SOBJS))
+SRCS	:= $(SOBJS-y:.o=.S) $(COBJS-y:.o=.c)
+OBJS	:= $(addprefix $(obj),$(COBJS-y) $(SOBJS-y))
+SOBJS	:= $(addprefix $(obj),$(SOBJS-y))
 
 $(LIB):	$(obj).depend $(OBJS) $(SOBJS)
-	$(call cmd_link_o_target, $(OBJS) $(SOBJS))
+	$(call cmd_link_o_target, $(OBJS))
 
 clean:
 	rm -f $(SOBJS) $(OBJS)
diff --git a/board/atmel/at91sam9261ek/at91sam9261ek.c b/board/atmel/at91sam9261ek/at91sam9261ek.c
index de5cfae..25c181e 100644
--- a/board/atmel/at91sam9261ek/at91sam9261ek.c
+++ b/board/atmel/at91sam9261ek/at91sam9261ek.c
@@ -246,7 +246,7 @@ int board_init(void)
 	gd->bd->bi_arch_number = MACH_TYPE_AT91SAM9261EK;
 #endif
 	/* adress of boot parameters */
-	gd->bd->bi_boot_params = PHYS_SDRAM + 0x100;
+	gd->bd->bi_boot_params = CONFIG_SYS_SDRAM_BASE + 0x100;
 
 	at91_serial_hw_init();
 #ifdef CONFIG_CMD_NAND
@@ -273,8 +273,9 @@ int board_eth_init(bd_t *bis)
 
 int dram_init(void)
 {
-	gd->bd->bi_dram[0].start = PHYS_SDRAM;
-	gd->bd->bi_dram[0].size = PHYS_SDRAM_SIZE;
+	/* dram_init must store complete ramsize in gd->ram_size */
+	gd->ram_size = get_ram_size((volatile long *)CONFIG_SYS_SDRAM_BASE,
+			CONFIG_SYS_SDRAM_SIZE);
 	return 0;
 }
 
diff --git a/board/atmel/at91sam9261ek/config.mk b/board/atmel/at91sam9261ek/config.mk
deleted file mode 100644
index e554a45..0000000
--- a/board/atmel/at91sam9261ek/config.mk
+++ /dev/null
@@ -1 +0,0 @@
-CONFIG_SYS_TEXT_BASE = 0x23f00000
diff --git a/include/configs/at91sam9261ek.h b/include/configs/at91sam9261ek.h
index 401478b..0cffd94 100644
--- a/include/configs/at91sam9261ek.h
+++ b/include/configs/at91sam9261ek.h
@@ -27,6 +27,8 @@
 #ifndef __CONFIG_H
 #define __CONFIG_H
 
+#include <asm/sizes.h>
+
 #define CONFIG_AT91_LEGACY
 
 /* ARM asynchronous clock */
@@ -39,6 +41,7 @@
 #else
 #define CONFIG_AT91SAM9261	1	/* It's an Atmel AT91SAM9261 SoC*/
 #endif
+#define CONFIG_AT91FAMILY
 #define CONFIG_ARCH_CPU_INIT
 #undef CONFIG_USE_IRQ			/* we don't need IRQ/FIQ stuff	*/
 
@@ -105,11 +108,21 @@
 #define CONFIG_CMD_DHCP		1
 #define CONFIG_CMD_NAND		1
 #define CONFIG_CMD_USB		1
+#define CONFIG_CMD_CACHE	1
 
 /* SDRAM */
 #define CONFIG_NR_DRAM_BANKS		1
-#define PHYS_SDRAM			0x20000000
-#define PHYS_SDRAM_SIZE			0x04000000	/* 64 megs */
+#define CONFIG_SYS_SDRAM_BASE		0x20000000
+#define CONFIG_SYS_SDRAM_SIZE		SZ_64M	/* 64 megs */
+
+/*
+ * AT91-bootstrap expects that U-boot needs to be loaded at 0x23f00000
+ * but since U-boot is now being relocated to the end of RAM which is
+ * almost in the same area, there will be an overlap in the BSS segment
+ * resulting in a lockup during boot. So, we need to tell the
+ * AT91-bootstrap code to load it at a lower address, namely 0x23e00000
+ */
+#define CONFIG_SYS_TEXT_BASE			0x23e00000
 
 /* DataFlash */
 #define CONFIG_ATMEL_DATAFLASH_SPI
@@ -168,7 +181,7 @@
 
 #define CONFIG_SYS_LOAD_ADDR			0x22000000	/* load address */
 
-#define CONFIG_SYS_MEMTEST_START		PHYS_SDRAM
+#define CONFIG_SYS_MEMTEST_START		CONFIG_SYS_SDRAM_BASE
 #define CONFIG_SYS_MEMTEST_END			0x23e00000
 
 #ifdef CONFIG_SYS_USE_DATAFLASH_CS0
@@ -230,8 +243,12 @@
  * Size of malloc() pool
  */
 #define CONFIG_SYS_MALLOC_LEN		ROUND(3 * CONFIG_ENV_SIZE + 128*1024, 0x1000)
+/* size in bytes reserved for initial data */
+
+#define CONFIG_SYS_INIT_SP_ADDR		(CONFIG_SYS_SDRAM_BASE + SZ_4K \
+					- GENERATED_GBL_DATA_SIZE)
 
-#define CONFIG_STACKSIZE	(32*1024)	/* regular stack */
+#define CONFIG_STACKSIZE	(SZ_32K)	/* regular stack */
 
 #ifdef CONFIG_USE_IRQ
 #error CONFIG_USE_IRQ not supported
-- 
1.7.1