[U-Boot] [PATCH v2 20/22] omap: spl: add FAT support over MMC

[Aneesh V]

Signed-off-by: Aneesh V <aneesh at ti.com>
---
V2:
 * Changes for make file changes
---
 include/configs/omap4_sdp4430.h |    1 +
 spl/board/ti/omap4.mk           |    7 +++++++
 spl/board/ti/spl-omap.c         |   22 ++++++++++++++++++++++
 3 files changed, 30 insertions(+), 0 deletions(-)

diff --git a/include/configs/omap4_sdp4430.h b/include/configs/omap4_sdp4430.h
index 0b67345..cc64671 100644
--- a/include/configs/omap4_sdp4430.h
+++ b/include/configs/omap4_sdp4430.h
@@ -263,6 +263,7 @@
 
 #define CONFIG_SYS_MMCSD_RAW_MODE_U_BOOT_SECTOR	0x300 /* address 0x60000 */
 #define CONFIG_SYS_U_BOOT_MAX_SIZE_SECTORS	0x200 /* 256 KB */
+#define CONFIG_SYS_MMC_SD_FAT_BOOT_PARTITION	1
 
 #define CONFIG_SYS_SPL_BSS_START_ADDR		0x80000000
 #define CONFIG_SYS_SPL_BSS_MAX_SIZE		0x80000		/* 512 KB */
diff --git a/spl/board/ti/omap4.mk b/spl/board/ti/omap4.mk
index ecf605e..e66a532 100644
--- a/spl/board/ti/omap4.mk
+++ b/spl/board/ti/omap4.mk
@@ -107,6 +107,13 @@ $(obj)part_dos.h:
 
 COBJS	+= omap_hsmmc.o omap24xx_i2c.o mmc.o time.o part.o part_dos.o
 
+# fat
+$(obj)fat.c:
+	@rm -f $@
+	@ln -s $(TOPDIR)/fs/fat/fat.c $@
+
+COBJS	+=  fat.o
+
 # armv7
 $(obj)start.S:
 	@rm -f $@
diff --git a/spl/board/ti/spl-omap.c b/spl/board/ti/spl-omap.c
index 2174c55..81ca0d3 100644
--- a/spl/board/ti/spl-omap.c
+++ b/spl/board/ti/spl-omap.c
@@ -29,6 +29,7 @@
 #include <asm/u-boot.h>
 #include <asm/arch/sys_proto.h>
 #include <mmc.h>
+#include <fat.h>
 #include <timestamp_autogenerated.h>
 #include <version_autogenerated.h>
 #include <asm/omap_common.h>
@@ -104,6 +105,25 @@ end:
 	}
 }
 
+static void mmc_load_uboot_fat(struct mmc *mmc)
+{
+	s32 err;
+
+	err = fat_register_device(&mmc->block_dev,
+				CONFIG_SYS_MMC_SD_FAT_BOOT_PARTITION);
+	if (err) {
+		printf("spl: fat register err - %d\n", err);
+		hang();
+	}
+
+	err = file_fat_read("u-boot.bin", (u8 *)CONFIG_SYS_TEXT_BASE, 0);
+
+	if (err <= 0) {
+		printf("spl: error reading u-boot.bin - %d\n", err);
+		hang();
+	}
+}
+
 static void mmc_load_uboot(u32 mmc_dev)
 {
 	struct mmc *mmc;
@@ -127,6 +147,8 @@ static void mmc_load_uboot(u32 mmc_dev)
 	boot_mode = omap_boot_mode();
 	if (boot_mode == MMCSD_MODE_RAW)
 		mmc_load_uboot_raw(mmc, mmc_dev);
+	else if (boot_mode == MMCSD_MODE_FAT)
+		mmc_load_uboot_fat(mmc);
 	else {
 		puts("spl: wrong MMC boot mode\n");
 		hang();
-- 
1.7.0.4