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#############################################################
#
# U-Boot
#
#############################################################
U_BOOT_VERSION:=$(call qstrip,$(BR2_UBOOT_VERSION))

U_BOOT_SOURCE:=u-boot-$(U_BOOT_VERSION).tar.bz2

U_BOOT_SITE:=ftp://ftp.denx.de/pub/u-boot
U_BOOT_DIR:=$(BUILD_DIR)/u-boot-$(U_BOOT_VERSION)
U_BOOT_PATCH_DIR:=$(BUILD_DIR)/u-boot-$(U_BOOT_VERSION)-patches
U_BOOT_CAT:=$(BZCAT)
U_BOOT_BIN:=u-boot.bin
U_BOOT_TARGET_BIN:=u-boot-$(U_BOOT_VERSION)-$(DATE).bin

U_BOOT_TOOLS:=$(HOST_DIR)/usr/bin/mkimage
MKIMAGE:=$(U_BOOT_TOOLS)
U_BOOT_AUTOSCRIPT=$(BINARIES_DIR)/autoscript

U_BOOT_TARGETS:=$(BINARIES_DIR)/$(U_BOOT_BIN) $(U_BOOT_TOOLS)

ifeq ($(call qstrip,$(BR2_TARGET_UBOOT_DEFAULT_ENV)),y)
U_BOOT_TARGETS += u-boot-autoscript
endif

TARGET_UBOOT_IPADDR:=$(call qstrip,$(BR2_TARGET_UBOOT_IPADDR))
TARGET_UBOOT_SERVERIP:=$(call qstrip,$(BR2_TARGET_UBOOT_SERVERIP))
TARGET_UBOOT_GATEWAY:=$(call qstrip,$(BR2_TARGET_UBOOT_GATEWAY))
TARGET_UBOOT_NETMASK:=$(call qstrip,$(BR2_TARGET_UBOOT_NETMASK))
TARGET_UBOOT_ETHADDR:=$(call qstrip,$(BR2_TARGET_UBOOT_ETHADDR))

# u-boot still uses arch=ppc for powerpc
U_BOOT_ARCH=$(KERNEL_ARCH:powerpc=ppc)
ifeq ($(UBOOT_BOARD_NAME),)
UBOOT_BOARD_NAME:=$(call qstrip,$(BR2_TARGET_UBOOT_BOARDNAME))
endif

U_BOOT_INC_CONF_FILE:=$(U_BOOT_DIR)/include/config.h

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

U_BOOT_CONFIGURE_OPTS += CONFIG_NOSOFTFLOAT=1

# 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)) $(call qstrip,$(2))' >> $(U_BOOT_INC_CONF_FILE)
endef

$(DL_DIR)/$(U_BOOT_SOURCE):
	 $(call DOWNLOAD,$(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 $(BUILD_DIR) $(TAR_OPTIONS) -
	mkdir -p $(U_BOOT_DIR)
	touch $@

$(U_BOOT_DIR)/.patched: $(U_BOOT_DIR)/.unpacked
	toolchain/patch-kernel.sh $(U_BOOT_DIR) boot/u-boot \
		u-boot-$(U_BOOT_VERSION)-\*.patch \
		u-boot-$(U_BOOT_VERSION)-\*.patch.$(ARCH)
ifneq ($(strip $(U_BOOT_ARCH_PATCH_DIR)),)
	toolchain/patch-kernel.sh $(U_BOOT_DIR) $(U_BOOT_ARCH_PATCH_DIR) \*.patch
endif
ifneq ($(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)/.configured: $(U_BOOT_DIR)/.patched
	$(TARGET_CONFIGURE_OPTS)		\
		CFLAGS="$(TARGET_CFLAGS)"	\
		LDFLAGS="$(TARGET_LDFLAGS)"	\
		$(U_BOOT_CONFIGURE_OPTS) \
		$(MAKE) -C $(U_BOOT_DIR)	\
		$(UBOOT_BOARD_NAME)_config
	touch $@

$(U_BOOT_DIR)/.header_modified: $(U_BOOT_DIR)/.configured
	# Modify configuration header in $(U_BOOT_INC_CONF_FILE)
ifdef BR2_TARGET_UBOOT_DEFAULT_ENV
	@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)
	$(call insert_define, DATE, $(DATE))
	$(call insert_define, CONFIG_LOAD_SCRIPTS, 1)
endif # BR2_TARGET_UBOOT_DEFAULT_ENV
ifdef BR2_TARGET_UBOOT_NETWORK
ifneq ($(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_SERVERIP)),"")
	$(call insert_define, CONFIG_SERVERIP, $(BR2_TARGET_UBOOT_SERVERIP))
endif
ifneq ($(strip $(BR2_TARGET_UBOOT_ETHADDR)),"")
	$(call insert_define, CONFIG_ETHADDR, $(BR2_TARGET_UBOOT_ETHADDR))
endif
ifneq ($(strip $(BR2_TARGET_UBOOT_ETH1ADDR)),)
ifneq ($(strip $(BR2_TARGET_UBOOT_ETH1ADDR)),"")
	$(call insert_define, CONFIG_ETH1ADDR, $(BR2_TARGET_UBOOT_ETH1ADDR))
endif
endif
endif # BR2_TARGET_UBOOT_NETWORK
ifeq ($(BR2_TARGET_UBOOT_SILENT),y)
	$(call insert_define, CONFIG_SILENT_CONSOLE,)
endif
ifdef BR2_TARGET_UBOOT_DEFAULT_ENV
ifneq ($(strip $(BR2_TARGET_UBOOT_KERNEL_START)),"")
	$(call insert_define, KERNEL_START, $(BR2_TARGET_UBOOT_KERNEL_START))
endif
ifneq ($(strip $(BR2_TARGET_UBOOT_KERNEL_LOCATION)),"")
	$(call insert_define, KERNEL_LOCATION, $(BR2_TARGET_UBOOT_KERNEL_LOCATION))
endif
ifneq ($(strip $(BR2_TARGET_UBOOT_FILESYSTEM_START)),"")
	$(call insert_define, FILESYSTEM_START, $(BR2_TARGET_UBOOT_FILESYSTEM_START))
endif
ifneq ($(strip $(BR2_TARGET_UBOOT_FILESYSTEM_LOCATION)),"")
	$(call insert_define, FILESYSTEM_LOCATION, $(BR2_TARGET_UBOOT_FILESYSTEM_LOCATION))
endif
ifneq ($(strip $(BR2_TARGET_UBOOT_FILESYSTEM_SIZE)),"")
	$(call insert_define, FILESYSTEM_SIZE, $(BR2_TARGET_UBOOT_FILESYSTEM_SIZE))
endif
ifneq ($(strip $(BR2_TARGET_UBOOT_END_OF_FLASH)),"")
	$(call insert_define, END_OF_FLASH, $(BR2_TARGET_UBOOT_END_OF_FLASH))
endif
ifneq ($(strip $(BR2_TARGET_UBOOT_MEMORY_SIZE)),"")
	$(call insert_define, MEMORY_SIZE, $(BR2_TARGET_UBOOT_MEMORY_SIZE))
endif
	@echo "#endif /* __BR2_ADDED_CONFIG_H */" >> $(U_BOOT_INC_CONF_FILE)
endif # BR2_TARGET_UBOOT_DEFAULT_ENV
	touch $@

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

$(BINARIES_DIR)/$(U_BOOT_BIN): $(U_BOOT_DIR)/$(U_BOOT_BIN)
	rm -f $(BINARIES_DIR)/$(U_BOOT_BIN)
	rm -f $(BINARIES_DIR)/$(U_BOOT_TARGET_BIN)
	cp -dpf $(U_BOOT_DIR)/$(U_BOOT_BIN) $(BINARIES_DIR)/$(U_BOOT_TARGET_BIN)
	(cd $(BINARIES_DIR); ln -s $(U_BOOT_TARGET_BIN) $(U_BOOT_BIN))

$(U_BOOT_TOOLS): $(U_BOOT_DIR)/$(U_BOOT_BIN)
	mkdir -p $(@D)
	cp -dpf $(U_BOOT_DIR)/tools/mkimage $@

$(TARGET_DIR)/usr/bin/mkimage: $(U_BOOT_DIR)/$(U_BOOT_BIN)
	mkdir -p $(@D)
	$(TARGET_CC) -I$(U_BOOT_DIR)/include -I$(U_BOOT_DIR)/tools \
		-DUSE_HOSTCC -o $@ \
		$(U_BOOT_DIR)/common/image.c \
		$(wildcard $(addprefix $(U_BOOT_DIR)/tools/,default_image.c \
			fit_image.c imximage.c kwbimage.c mkimage.c)) \
		$(addprefix $(U_BOOT_DIR)/lib_generic/,crc32.c md5.c sha1.c) \
		$(U_BOOT_DIR)/tools/os_support.c \
		$(U_BOOT_DIR)/libfdt/fdt*.c

	$(STRIPCMD) $(STRIP_STRIP_UNNEEDED) $@

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

u-boot: $(U_BOOT_TARGETS)

u-boot-autoscript: $(U_BOOT_AUTOSCRIPT).img

u-boot-clean:
	-$(MAKE) -C $(U_BOOT_DIR) clean
	rm -f $(U_BOOT_TOOLS) $(U_BOOT_TARGET_TOOLS)

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

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

u-boot-unpacked: $(U_BOOT_DIR)/.patched

u-boot-configured: $(U_BOOT_DIR)/.header_modified

#############################################################
#
# Generate an autoscript with the configration items
#
#############################################################

$(U_BOOT_AUTOSCRIPT): .config
	rm -f $(U_BOOT_AUTOSCRIPT)
ifneq ($(TARGET_UBOOT_IPADDR),)
	echo setenv ipaddr $(TARGET_UBOOT_IPADDR) > $(U_BOOT_AUTOSCRIPT)
else
	echo TARGET_UBOOT_IPADDR="$(TARGET_UBOOT_IPADDR)"
endif
ifneq ($(TARGET_UBOOT_SERVERIP),)
	echo setenv serverip $(TARGET_UBOOT_SERVERIP) >> $(U_BOOT_AUTOSCRIPT)
endif
ifneq ($(TARGET_UBOOT_GATEWAY),)
	echo setenv gatewayip $(TARGET_UBOOT_GATEWAY) >> $(U_BOOT_AUTOSCRIPT)
endif
ifneq ($(TARGET_UBOOT_NETMASK),)
	echo setenv netmask $(TARGET_UBOOT_NETMASK) >> $(U_BOOT_AUTOSCRIPT)
endif
	echo setenv linux $(LINUX26_KERNEL_NAME) >> $(U_BOOT_AUTOSCRIPT)
	echo setenv kernel-version $(LINUX26_VERSION) >> $(U_BOOT_AUTOSCRIPT)
	echo setenv kernel-date $(DATE) >> $(U_BOOT_AUTOSCRIPT)
	echo setenv hostname $(TARGET_HOSTNAME) >> $(U_BOOT_AUTOSCRIPT)
	echo setenv fs-date $(DATE) >> $(U_BOOT_AUTOSCRIPT)
	echo setenv rd-1 rootfs.$(ARCH)-$(DATE).ext2 >> $(U_BOOT_AUTOSCRIPT)
	echo setenv rd-2 rootfs.$(ARCH)-$(DATE).jffs2 >> $(U_BOOT_AUTOSCRIPT)
	echo setenv rd rootfs.$(BR2_ARCH)-$(DATE).ext2 >> $(U_BOOT_AUTOSCRIPT)
	echo setenv ver 1 >> $(U_BOOT_AUTOSCRIPT)
ifneq ($(TARGET_UBOOT_ETHADDR),)
	echo setenv ethaddr $(TARGET_UBOOT_ETHADDR) >> $(U_BOOT_AUTOSCRIPT)
endif
	echo setenv fstype ram >> $(U_BOOT_AUTOSCRIPT)
	echo fs >> $(U_BOOT_AUTOSCRIPT)
	echo os >> $(U_BOOT_AUTOSCRIPT)
	echo setargs >> $(U_BOOT_AUTOSCRIPT)
	echo saveenv >> $(U_BOOT_AUTOSCRIPT)

$(U_BOOT_AUTOSCRIPT).img: $(U_BOOT_AUTOSCRIPT) $(MKIMAGE)
	$(MKIMAGE) -A $(ARCH) \
				-O linux \
				-T script \
				-C none \
				-a 0 \
				-e 0 \
				-n "autoscr config" \
				-d $(U_BOOT_AUTOSCRIPT) \
				$(U_BOOT_AUTOSCRIPT).img



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

# we NEED a board name
ifeq ($(UBOOT_BOARD_NAME),)
$(error NO U-Boot board name set. Check your BR2_TARGET_UBOOT_BOARDNAME setting)
endif

endif