omap-common/spl: Add linux boot to SPL

This adds Linux booting to the SPL

This depends on CONFIG_MACH_TYPE patch by Igor Grinberg
(http://article.gmane.org/gmane.comp.boot-loaders.u-boot/105809)

Related CONFIGs:
CONFIG_SPL_OS_BOOT
	Activates/Deactivates the OS booting feature
CONFIG_SPL_OS_BOOT_KEY
	defines the IO-pin number u-boot switch - if pressed u-boot is
	booted
CONFIG_SYS_NAND_SPL_KERNEL_OFFS
	Offset in NAND of direct boot kernel image to use in SPL
CONFIG_SYS_SPL_ARGS_ADDR
	Address where the kernel boot arguments are expected - this is
	normaly RAM-begin + 0x100

Signed-off-by: Simon Schwarz <simonschwarzcor@gmail.com>
CC: Tom Rini <tom.rini@gmail.com>
CC: Stefano Babic <sbabic@denx.de>
CC: Wolfgang Denk <wd@denx.de>

1 files changed, 30 insertions, 23 deletions

diff --git a/arch/arm/cpu/armv7/omap-common/spl_nand.c b/arch/arm/cpu/armv7/omap-common/spl_nand.c
index 2a66214..1295e88 100644
--- a/arch/arm/cpu/armv7/omap-common/spl_nand.c
+++ b/arch/arm/cpu/armv7/omap-common/spl_nand.c
@@ -29,7 +29,6 @@
 #include <version.h>
 #include <asm/omap_common.h>
 
-
 void spl_nand_load_image(void)
 {
 	struct image_header *header;
@@ -50,7 +49,7 @@ void spl_nand_load_image(void)
 	/*use CONFIG_SYS_TEXT_BASE as temporary storage area */
 	header = (struct image_header *)(CONFIG_SYS_TEXT_BASE);
 #ifdef CONFIG_SPL_OS_BOOT
-	if (!spl_uboot_key()) {
+	if (!spl_start_uboot()) {
 		/*
 		 * load parameter image
 		 * load to temp position since nand_spl_load_image reads
@@ -74,31 +73,39 @@ void spl_nand_load_image(void)
 		nand_spl_load_image(CONFIG_SYS_NAND_SPL_KERNEL_OFFS,
 			CONFIG_SYS_NAND_PAGE_SIZE, (void *)header);
 		spl_parse_image_header(header);
-		nand_spl_load_image(CONFIG_SYS_NAND_SPL_KERNEL_OFFS,
-			spl_image.size, (void *)spl_image.load_addr);
-	} else
+		if (header->ih_os == IH_OS_LINUX) {
+			/* happy - was a linux */
+			nand_spl_load_image(CONFIG_SYS_NAND_SPL_KERNEL_OFFS,
+				spl_image.size, (void *)spl_image.load_addr);
+			nand_deselect();
+			return;
+		} else {
+			printf("The Expected Linux image was not"
+				"found. Please check your NAND"
+				"configuration.\n");
+			printf("Trying to start u-boot now...\n");
+		}
+	}
 #endif
-	{
 #ifdef CONFIG_NAND_ENV_DST
-		nand_spl_load_image(CONFIG_ENV_OFFSET,
-			CONFIG_SYS_NAND_PAGE_SIZE, (void *)header);
-		spl_parse_image_header(header);
-		nand_spl_load_image(CONFIG_ENV_OFFSET, spl_image.size,
-			(void *)spl_image.load_addr);
+	nand_spl_load_image(CONFIG_ENV_OFFSET,
+		CONFIG_SYS_NAND_PAGE_SIZE, (void *)header);
+	spl_parse_image_header(header);
+	nand_spl_load_image(CONFIG_ENV_OFFSET, spl_image.size,
+		(void *)spl_image.load_addr);
 #ifdef CONFIG_ENV_OFFSET_REDUND
-		nand_spl_load_image(CONFIG_ENV_OFFSET_REDUND,
-			CONFIG_SYS_NAND_PAGE_SIZE, (void *)header);
-		spl_parse_image_header(header);
-		nand_spl_load_image(CONFIG_ENV_OFFSET_REDUND, spl_image.size,
-			(void *)spl_image.load_addr);
+	nand_spl_load_image(CONFIG_ENV_OFFSET_REDUND,
+		CONFIG_SYS_NAND_PAGE_SIZE, (void *)header);
+	spl_parse_image_header(header);
+	nand_spl_load_image(CONFIG_ENV_OFFSET_REDUND, spl_image.size,
+		(void *)spl_image.load_addr);
 #endif
 #endif
-		/* Load u-boot */
-		nand_spl_load_image(CONFIG_SYS_NAND_U_BOOT_OFFS,
-			CONFIG_SYS_NAND_PAGE_SIZE, (void *)header);
-		spl_parse_image_header(header);
-		nand_spl_load_image(CONFIG_SYS_NAND_U_BOOT_OFFS,
-			spl_image.size, (void *)spl_image.load_addr);
-	}
+	/* Load u-boot */
+	nand_spl_load_image(CONFIG_SYS_NAND_U_BOOT_OFFS,
+		CONFIG_SYS_NAND_PAGE_SIZE, (void *)header);
+	spl_parse_image_header(header);
+	nand_spl_load_image(CONFIG_SYS_NAND_U_BOOT_OFFS,
+		spl_image.size, (void *)spl_image.load_addr);
 	nand_deselect();
 }