#############################################################
#
# U-Boot
#
#############################################################
U_BOOT_VERSION:=1.3.2
U_BOOT_SOURCE:=u-boot-$(U_BOOT_VERSION).tar.bz2
U_BOOT_SITE:=ftp://ftp.denx.de/pub/u-boot
U_BOOT_DIR:=$(PROJECT_BUILD_DIR)/u-boot-$(U_BOOT_VERSION)
U_BOOT_PATCH_DIR:=$(PROJECT_BUILD_DIR)/u-boot-patches
U_BOOT_CAT:=$(BZCAT)
U_BOOT_BIN:=u-boot.bin
U_BOOT_TOOLS_BIN:=mkimage
# u-boot still uses arch=ppc for powerpc
U_BOOT_ARCH:=$(shell echo $(KERNEL_ARCH)|$(HOST_SED_DIR)/bin/sed 's/powerpc/ppc/')

ifneq ($(BR2_TARGET_U_BOOT_CONFIG_BOARD),)
U_BOOT_INC_CONF_FILE:=$(U_BOOT_DIR)/include/configs/$(subst _config,,$(BR2_TARGET_U_BOOT_CONFIG_BOARD)).h
else
U_BOOT_INC_CONF_FILE:=$(U_BOOT_DIR)/include/config.h
endif

U_BOOT_TARGET_TOOLS:=
ifeq ($(strip $(BR2_TARGET_UBOOT_TOOL_MKIMAGE)),y)
U_BOOT_TARGET_TOOLS+=$(TARGET_DIR)/usr/bin/mkimage
endif
ifeq ($(strip $(BR2_TARGET_UBOOT_TOOL_ENV)),y)
U_BOOT_TARGET_TOOLS+=$(TARGET_DIR)/usr/sbin/fw_printenv
endif


# Define a helper function
define insert_define
@echo "#ifdef $(strip $(1))" >> $(U_BOOT_INC_CONF_FILE)
@echo "#undef $(strip $(1))" >> $(U_BOOT_INC_CONF_FILE)
@echo "#endif" >> $(U_BOOT_INC_CONF_FILE)
@echo "#define $(strip $(1)) $(2)" >> $(U_BOOT_INC_CONF_FILE)
endef

$(DL_DIR)/$(U_BOOT_SOURCE):
	 $(WGET) -P $(DL_DIR) $(U_BOOT_SITE)/$(U_BOOT_SOURCE)

$(U_BOOT_DIR)/.unpacked: $(DL_DIR)/$(U_BOOT_SOURCE)
	$(U_BOOT_CAT) $(DL_DIR)/$(U_BOOT_SOURCE) \
		| tar -C $(PROJECT_BUILD_DIR) $(TAR_OPTIONS) -
	touch $@

$(U_BOOT_DIR)/.patched: $(U_BOOT_DIR)/.unpacked
	toolchain/patch-kernel.sh $(U_BOOT_DIR) target/u-boot/ \
		u-boot-$(U_BOOT_VERSION)-\*.patch \
		u-boot-$(U_BOOT_VERSION)-\*.patch.$(ARCH)
ifneq ($(strip $(BR2_TARGET_UBOOT_CUSTOM_PATCH)),"")
	@mkdir -p $(U_BOOT_PATCH_DIR)
	cp -dpr $(BR2_TARGET_UBOOT_CUSTOM_PATCH) $(U_BOOT_PATCH_DIR)
	toolchain/patch-kernel.sh $(U_BOOT_DIR) $(U_BOOT_PATCH_DIR) \*.patch
endif
	touch $@

$(U_BOOT_DIR)/.header_copied: $(U_BOOT_DIR)/.patched
ifneq ($(strip $(BR2_TARGET_U_BOOT_CONFIG_HEADER_FILE)),)
	cp -dpf $(BR2_TARGET_U_BOOT_CONFIG_HEADER_FILE) $(U_BOOT_INC_CONF_FILE)
endif
	touch $@

$(U_BOOT_DIR)/.configured: $(U_BOOT_DIR)/.header_copied
	$(TARGET_CONFIGURE_OPTS)		\
		CFLAGS="$(TARGET_CFLAGS)"	\
		LDFLAGS="$(TARGET_LDFLAGS)"	\
		$(MAKE) -C $(U_BOOT_DIR)	\
		$(BR2_TARGET_UBOOT_BOARDNAME)_config
	touch $@

$(U_BOOT_DIR)/.header_modified: $(U_BOOT_DIR)/.configured
	# Modify configuration header in $(U_BOOT_INC_CONF_FILE)
	
	@echo >> $(U_BOOT_INC_CONF_FILE)
	@echo "/* Add a wrapper around the values Buildroot sets. */" >> $(U_BOOT_INC_CONF_FILE)
	@echo "#ifndef __BR2_ADDED_CONFIG_H" >> $(U_BOOT_INC_CONF_FILE)
	@echo "#define __BR2_ADDED_CONFIG_H" >> $(U_BOOT_INC_CONF_FILE)
ifneq ($(strip $(BR2_PROJECT)),"")
	$(call insert_define, "CONFIG_HOSTNAME", $(BR2_PROJECT))
endif
ifneq ($(strip $(BR2_TARGET_UBOOT_SERVERIP)),"")
	$(call insert_define, "CONFIG_SERVERIP", $(BR2_TARGET_UBOOT_SERVERIP))
endif

ifneq ($(strip $(BR2_TARGET_UBOOT_IPADDR)),"")
	$(call insert_define, "CONFIG_IPADDR", $(BR2_TARGET_UBOOT_IPADDR))
ifneq ($(strip $(BR2_TARGET_UBOOT_GATEWAY)),"")
	$(call insert_define, "CONFIG_GATEWAYIP", $(BR2_TARGET_UBOOT_GATEWAY))
endif
ifneq ($(strip $(BR2_TARGET_UBOOT_NETMASK)),"")
	$(call insert_define, "CONFIG_NETMASK", $(BR2_TARGET_UBOOT_NETMASK))
endif
endif # end BR2_TARGET_U_BOOT_IPADDR

ifneq ($(strip $(BR2_TARGET_UBOOT_ETHADDR)),"")
	$(call insert_define, "CONFIG_ETHADDR", $(BR2_TARGET_UBOOT_ETHADDR))
endif
ifneq ($(strip $(BR2_TARGET_UBOOT_ETH1ADDR)),"")
	$(call insert_define "CONFIG_ETH2ADDR", $(BR2_TARGET_UBOOT_ETH1ADDR))
endif
ifneq ($(strip $(BR2_TARGET_UBOOT_BOOTARGS)),"")
	$(call insert_define "CONFIG_BOOTARGS", $(BR2_TARGET_UBOOT_BOOTARGS))
endif
ifneq ($(strip $(BR2_TARGET_UBOOT_BOOTCMD)),"")
	$(call insert_define "CONFIG_BOOTCOMMAND", $(BR2_TARGET_UBOOT_BOOTCMD))
endif
ifneq ($(strip $(BR2_TARGET_UBOOT_SILENT)),"")
	$(call insert_define "CONFIG_SILENT_CONSOLE", "")
endif
	@echo "#endif /* __BR2_ADDED_CONFIG_H */" >> $(U_BOOT_INC_CONF_FILE)
	touch $@

$(U_BOOT_DIR)/$(U_BOOT_BIN): $(U_BOOT_DIR)/.header_modified
	$(TARGET_CONFIGURE_OPTS) \
		CFLAGS="$(TARGET_CFLAGS)" \
		LDFLAGS="$(TARGET_LDFLAGS)" \
		$(MAKE) CROSS_COMPILE="$(TARGET_CROSS)" ARCH=$(U_BOOT_ARCH) \
		 -C $(U_BOOT_DIR)

$(BINARIES_DIR)/$(U_BOOT_BIN): $(U_BOOT_DIR)/$(U_BOOT_BIN)
	cp -dpf $(U_BOOT_DIR)/$(U_BOOT_BIN) $(BINARIES_DIR)
	cp -dpf $(U_BOOT_DIR)/tools/$(U_BOOT_TOOLS_BIN) $(STAGING_DIR)/usr/bin/

$(TARGET_DIR)/usr/bin/mkimage: $(U_BOOT_DIR)/$(U_BOOT_BIN)
	$(TARGET_CC) -I$(U_BOOT_DIR)/include -DUSE_HOSTCC -o $@ \
		$(U_BOOT_DIR)/tools/mkimage.c $(U_BOOT_DIR)/tools/crc32.c
	$(STRIPCMD) $(STRIP_STRIP_UNNEEDED) $@

$(TARGET_DIR)/usr/sbin/fw_printenv: $(U_BOOT_DIR)/$(U_BOOT_BIN)
	$(TARGET_CC) -I$(U_BOOT_DIR)/include -I$(LINUX_HEADERS_DIR)/include \
		-DUSE_HOSTCC -o $@ \
		$(U_BOOT_DIR)/tools/env/*.c $(U_BOOT_DIR)/tools/crc32.c
	$(STRIPCMD) $(STRIP_STRIP_UNNEEDED) $@
	ln -sf fw_printenv $(TARGET_DIR)/usr/sbin/fw_setenv

u-boot: gcc $(BINARIES_DIR)/$(U_BOOT_BIN) $(U_BOOT_TARGET_TOOLS)

u-boot-clean:
	-$(MAKE) -C $(U_BOOT_DIR) clean
	rm -f $(STAGING_DIR)/usr/bin/$(U_BOOT_TOOLS_BIN) $(U_BOOT_TARGET_TOOLS)

u-boot-dirclean:
	rm -rf $(U_BOOT_DIR)

u-boot-source: $(DL_DIR)/$(U_BOOT_SOURCE)

#############################################################
#
# Toplevel Makefile options
#
#############################################################
ifeq ($(strip $(BR2_TARGET_UBOOT)),y)
TARGETS+=u-boot
endif

u-boot-status:
	@echo
	@echo U_BOOT_INC_CONF_FILE = $(U_BOOT_INC_CONF_FILE)
	@echo
	@echo BR2_TARGET_U_BOOT_CONFIG_HEADER_FILE = $(BR2_TARGET_U_BOOT_CONFIG_HEADER_FILE)
	@echo BR2_TARGET_U_BOOT_CONFIG_BOARD = $(BR2_TARGET_U_BOOT_CONFIG_BOARD)
	@echo BR2_TARGET_UBOOT_SERVERIP = $(BR2_TARGET_UBOOT_SERVERIP)
	@echo BR2_TARGET_UBOOT_IPADDR = $(BR2_TARGET_UBOOT_IPADDR)
	@echo BR2_TARGET_UBOOT_GATEWAY = $(BR2_TARGET_UBOOT_GATEWAY)
	@echo BR2_TARGET_UBOOT_NETMASK = $(BR2_TARGET_UBOOT_NETMASK)
	@echo BR2_TARGET_UBOOT_ETH0ADDR = $(BR2_TARGET_UBOOT_ETHADDR)
	@echo BR2_TARGET_UBOOT_ETH1ADDR = $(BR2_TARGET_UBOOT_ETH1ADDR)
	@echo BR2_TARGET_UBOOT_BOOTARGS = $(BR2_TARGET_UBOOT_BOOTARGS)
	@echo BR2_TARGET_UBOOT_BOOTCMD = $(BR2_TARGET_UBOOT_BOOTCMD)
	@echo BR2_TARGET_UBOOT_SILENT = $(BR2_TARGET_UBOOT_SILENT)
	@echo
	@exit 0