[U-Boot] [PATCH 7/7 V3] Enable SPI booting.

[Rajeshwari Shinde]

This patch enables SPI Booting for EXYNOS5

Signed-off-by: Rajeshwari Shinde <rajeshwari.s at samsung.com>
---
Changes in V2:
        - None.
Changes in V3:
	- None.
 board/samsung/smdk5250/Makefile                   |    2 +-
 board/samsung/smdk5250/{mmc_boot.c => spl_boot.c} |   31 +++++++++++++++++++-
 include/configs/smdk5250.h                        |    5 +++
 3 files changed, 35 insertions(+), 3 deletions(-)
 rename board/samsung/smdk5250/{mmc_boot.c => spl_boot.c} (66%)

diff --git a/board/samsung/smdk5250/Makefile b/board/samsung/smdk5250/Makefile
index 1474fa8..47c6a5a 100644
--- a/board/samsung/smdk5250/Makefile
+++ b/board/samsung/smdk5250/Makefile
@@ -36,7 +36,7 @@ COBJS	+= smdk5250.o
 endif
 
 ifdef CONFIG_SPL_BUILD
-COBJS	+= mmc_boot.o
+COBJS	+= spl_boot.o
 endif
 
 SRCS	:= $(SOBJS:.o=.S) $(COBJS:.o=.c)
diff --git a/board/samsung/smdk5250/mmc_boot.c b/board/samsung/smdk5250/spl_boot.c
similarity index 66%
rename from board/samsung/smdk5250/mmc_boot.c
rename to board/samsung/smdk5250/spl_boot.c
index 449a919..d8f3c1e 100644
--- a/board/samsung/smdk5250/mmc_boot.c
+++ b/board/samsung/smdk5250/spl_boot.c
@@ -23,6 +23,16 @@
 #include<common.h>
 #include<config.h>
 
+enum boot_mode {
+	BOOT_MODE_MMC = 4,
+	BOOT_MODE_SERIAL = 20,
+	/* Boot based on Operating Mode pin settings */
+	BOOT_MODE_OM = 32,
+	BOOT_MODE_USB,	/* Boot using USB download */
+};
+
+	typedef u32 (*spi_copy_func_t)(u32 offset, u32 nblock, u32 dst);
+
 /*
 * Copy U-boot from mmc to RAM:
 * COPY_BL2_FNPTR_ADDR: Address in iRAM, which Contains
@@ -30,9 +40,26 @@
 */
 void copy_uboot_to_ram(void)
 {
-	u32 (*copy_bl2)(u32, u32, u32) = (void *) *(u32 *)COPY_BL2_FNPTR_ADDR;
+	spi_copy_func_t spi_copy;
+	enum boot_mode bootmode;
+	u32 (*copy_bl2)(u32, u32, u32);
+
+	bootmode = readl(EXYNOS5_POWER_BASE) & OM_STAT;
 
-	copy_bl2(BL2_START_OFFSET, BL2_SIZE_BLOC_COUNT, CONFIG_SYS_TEXT_BASE);
+	switch (bootmode) {
+	case BOOT_MODE_SERIAL:
+		spi_copy = *(spi_copy_func_t *)EXYNOS_COPY_SPI_FNPTR_ADDR;
+		spi_copy(SPI_FLASH_UBOOT_POS, CONFIG_BL2_SIZE,
+						CONFIG_SYS_TEXT_BASE);
+		break;
+	case BOOT_MODE_MMC:
+		copy_bl2 = (void *) *(u32 *)COPY_BL2_FNPTR_ADDR;
+		copy_bl2(BL2_START_OFFSET, BL2_SIZE_BLOC_COUNT,
+						CONFIG_SYS_TEXT_BASE);
+		break;
+	default:
+		break;
+	}
 }
 
 void board_init_f(unsigned long bootflag)
diff --git a/include/configs/smdk5250.h b/include/configs/smdk5250.h
index 29b7ac6..4b9093c 100644
--- a/include/configs/smdk5250.h
+++ b/include/configs/smdk5250.h
@@ -192,6 +192,11 @@
 /* U-boot copy size from boot Media to DRAM.*/
 #define BL2_START_OFFSET	(CONFIG_BL2_OFFSET/512)
 #define BL2_SIZE_BLOC_COUNT	(CONFIG_BL2_SIZE/512)
+
+#define OM_STAT				(0x1f << 1)
+#define EXYNOS_COPY_SPI_FNPTR_ADDR	0x02020058
+#define SPI_FLASH_UBOOT_POS		(CONFIG_SEC_FW_SIZE + CONFIG_BL1_SIZE)
+
 #define CONFIG_DOS_PARTITION
 
 #define CONFIG_IRAM_STACK	0x02050000
-- 
1.7.4.4