#############################################################
#
# Linux kernel 2.6 target
#
#############################################################
ifneq ($(filter $(TARGETS),linux26),)


ifeq ($(LINUX_HEADERS_VERSION),)
# Version of Linux to download and then apply patches to
# XXX: andersee, i do not understand why we need this (BF)
DOWNLOAD_LINUX26_VERSION:=$(strip $(subst ",, $(BR2_DOWNLOAD_LINUX26_VERSION)))
# "))
LINUX26_VERSION:=$(strip $(subst ",, $(BR2_LINUX26_VERSION)))
# "))
LINUX26_RC_PATCH:=$(strip $(subst ",, $(BR2_LINUX26_RC_PATCH)))
# "))
LINUX_BSP_PATCH:=$(strip $(subst ",, $(BR2_LINUX_BSP_ATMEL_PATCH)))
# " ))
MKIMAGE:=$(BUILD_DIR)/mkimage

ifeq ($(DOWNLOAD_LINUX26_VERSION),)
DOWNLOAD_LINUX26_VERSION=2.6.19.2
endif
# Version of Linux after applying any patches
LINUX26_VERSION=$(DOWNLOAD_LINUX26_VERSION)


else # ---------------------------------------------------

# Define DOWNLOAD_LINUX26_VERSION unless defined
ifeq ($(strip $(BR2_DOWNLOAD_LINUX26_VERSION)),)
DOWNLOAD_LINUX26_VERSION=$(LINUX_HEADERS_VERSION)
else
DOWNLOAD_LINUX26_VERSION:=$(strip $(subst ",, $(BR2_DOWNLOAD_LINUX26_VERSION)))
# "))
endif


# Define LINUX26_VERSION unless defined
ifeq ($(strip $(BR2_LINUX26_VERSION)),)
LINUX26_VERSION=$(LINUX_HEADERS_VERSION)
else
LINUX26_VERSION:=$(strip $(subst ",, $(BR2_LINUX26_VERSION)))
# "))
endif

endif # ---------------------------------------------------

# Handle case when we want to build using an "rc" patch
# Example: to build 2.6.21-rc1 you need to:
# * Download linux-2.6.20
# * Apply patch-2.6.21-rc1

LINUX26_SOURCE:=linux-$(DOWNLOAD_LINUX26_VERSION).tar.bz2
LINUX26_SITE=http://ftp.kernel.org/pub/linux/kernel/v2.6
LINUX26_BZCAT:=$(BZCAT)

# Linux kernel binary
LINUX26_FORMAT:=$(strip $(subst ",, $(BR2_LINUX26_FORMAT)))
# " ))

# Linux kernel configuration file
ifeq ($(strip $(LINUX26_KCONFIG)),)
LINUX26_KCONFIG=$(BR2_BOARD_PATH)/linux26.config
endif

# File name for the Linux kernel binary
ifeq ($(strip $(LINUX26_KERNEL)),)
#LINUX26_KERNEL=linux-kernel-$(LINUX26_VERSION)-$(KERNEL_ARCH)
LINUX26_KERNEL:=$(BOARD_NAME)-linux-$(LINUX26_VERSION)-$(DATE).gz
endif

ifeq ($(strip $(LINUX26_BINLOC)),)
LINUX26_BINLOC=$(LINUX26_FORMAT)
endif

# Put binary in root file system
ifeq ($(strip $(BR2_LINUX_IN_ROOTFS)),y)
ifeq ($(strip $(LINUX26_TARGET)),)
LINUX26_TARGET:=$(TARGET_DIR)/boot/$(LINUX26_BINLOC)
endif
else
LINUX26_TARGET:=$(BINARIES_DIR)/$(LINUX26_KERNEL)
endif
endif

ifeq ($(strip $(LINUX26_BUILD_DIR)),)
LINUX26_BUILD_DIR=$(PROJECT_BUILD_DIR)
endif

ifeq ($(strip $(BR2_LINUX26_DEFCONFIG)),y)
LINUX26_DEFCONFIG=$(BOARD_NAME)_defconfig
endif

# Version of Linux AFTER patches
LINUX26_DIR=$(LINUX26_BUILD_DIR)/linux-$(LINUX26_VERSION)

# for packages that need it
LINUX_VERSION=$(LINUX26_VERSION)
LINUX_DIR=$(LINUX26_DIR)
LINUX_KERNEL=$(LINUX26_KERNEL)

# kernel patches
ifeq ($(strip $(subst ",, $(LINUX26_PATCH_DIR))),)
# ")))
LINUX26_PATCH_DIR:=$(BR2_BOARD_PATH)/kernel-patches/
endif
PATCH_DIR=$(strip $(subst ",, $(LINUX26_PATCH_DIR)))
# " ))

LINUX26_MAKE_FLAGS = $(TARGET_CONFIGURE_OPTS) ARCH=$(KERNEL_ARCH) \
	PATH=$(TARGET_PATH) INSTALL_MOD_PATH=$(TARGET_DIR) \
	CROSS_COMPILE=$(KERNEL_CROSS)

$(LINUX26_KCONFIG):
	@if [ ! -f "$(LINUX26_KCONFIG)" ] ; then \
		echo ""; \
		echo "You should create a .config for your kernel"; \
		echo "and install it as $(LINUX26_KCONFIG)"; \
		echo ""; \
		sleep 5; \
	fi

# Check if we have a release candidate.
# This makes life complex
# To build linux-2.6.21-rc2 you need to:
# * Download linux.2.6.20.tar.bz2
# * Download patch-2.6.21-rc2.bz2
# I:E you have to download the *previous* major version

ifneq ($(LINUX26_RC_PATCH),)
# We have a "release candidate"
LINUX26_RC_PATCH_SOURCE:=$(PROJECT_BUILD_DIR)/linux-patch/$(LINUX26_RC_PATCH)

# Create rule to download the patch
$(LINUX26_RC_PATCH_SOURCE):
	mkdir -p $(PROJECT_BUILD_DIR)/linux-patch/
	$(WGET) -P $(PROJECT_BUILD_DIR)/linux-patch $(LINUX26_SITE)/$(LINUX26_RC_PATCH)
# $(LINUX26_BZCAT) $(PROJECT_BUILD_DIR)/linux-patch/$(LINUX26_RC_PATCH).bz2
else
# We have a vanilla style linux kernel
LINUX26_RC_PATCH_SOURCE:=
endif

ifneq ($(strip $(LINUX_HEADERS_SOURCE)),$(strip $(LINUX26_SOURCE)))
$(DL_DIR)/$(LINUX26_SOURCE):
	 $(WGET) -P $(DL_DIR) $(LINUX26_SITE)/$(LINUX26_SOURCE)
endif

$(LINUX26_DIR)/.unpacked: $(DL_DIR)/$(LINUX26_SOURCE) $(LINUX26_RC_PATCH_SOURCE)
	rm -rf $(LINUX26_DIR)
	$(LINUX26_BZCAT) $(DL_DIR)/$(LINUX26_SOURCE) | tar -C $(LINUX26_BUILD_DIR) $(TAR_OPTIONS) -
ifneq ($(DOWNLOAD_LINUX26_VERSION),$(LINUX26_VERSION))
	# Rename the dir from the downloaded version to the AFTER patch version
	mv -f $(LINUX26_BUILD_DIR)/linux-$(DOWNLOAD_LINUX26_VERSION) $(LINUX26_DIR)
endif
ifneq ($(LINUX26_RC_PATCH),)
	-(cd $(LINUX26_DIR); $(LINUX26_BZCAT) $(LINUX26_RC_PATCH_SOURCE) | patch -p1)
endif
	-(cd $(TOOL_BUILD_DIR); ln -snf $(LINUX26_DIR) linux)
	rm -f $(LINUX26_DIR)/.kernelrelease
	echo $(LINUX26_VERSION) > $(LINUX26_DIR)/.kernelrelease
	touch $@

$(LINUX26_DIR)/.patched: $(LINUX26_DIR)/.unpacked
	echo $(PATCH_DIR)
	toolchain/patch-kernel.sh $(LINUX26_DIR) $(LINUX26_PATCH_DIR)
	touch $@

$(LINUX26_DIR)/.configured: $(LINUX26_DIR)/.patched $(LINUX26_KCONFIG)
	-ls -l $(LINUX26_DIR)/.patched
	-ls -l $(LINUX26_KCONFIG)
	-ls -l $(LINUX26_DIR)/.configured
	-ls -l $(LINUX26_DIR)/.unpacked
	-ls -l $(DL_DIR)/$(LINUX26_SOURCE)
	-ls -l $(LINUX26_RC_PATCH_SOURCE)
ifeq ($(strip $(BR2_LINUX26_DEFCONFIG)),y)
	make ARCH=$(ARCH) -C $(LINUX26_DIR) $(BOARD_NAME)_defconfig
else
	cp -df --preserve=mode,ownership $(LINUX26_KCONFIG) $(LINUX26_DIR)/.config
endif
ifeq ($(strip $(BR2_LINUX_CUSTOMIZE)),y)
	make -C $(LINUX26_DIR) xconfig
endif
	$(SED) '/CONFIG_AEABI/d' $(LINUX26_DIR)/.config
ifeq ($(BR2_EABI),y)
	echo "CONFIG_AEABI=y" >> $(LINUX26_DIR)/.config
	$(SED) '/CONFIG_OABI_COMPAT/d' $(LINUX26_DIR)/.config
	echo "# CONFIG_OABI_COMPAT is not set" >> $(LINUX26_DIR)/.config
else
	echo "# CONFIG_AEABI is not set" >> $(LINUX26_DIR)/.config
endif
	$(MAKE) $(LINUX26_MAKE_FLAGS) -C $(LINUX26_DIR) oldconfig include/linux/version.h
	touch $@

$(LINUX26_DIR)/.depend_done: $(LINUX26_DIR)/.configured
	$(MAKE) $(LINUX26_MAKE_FLAGS) -C $(LINUX26_DIR) prepare
	touch $@

$(LINUX26_DIR)/arch/$(ARCH)/boot/$(LINUX26_FORMAT): $(LINUX26_DIR)/vmlinux
	$(MAKE) $(LINUX26_MAKE_FLAGS) -C $(LINUX26_DIR) $(LINUX26_FORMAT)
	$(MAKE) $(LINUX26_MAKE_FLAGS) -C $(LINUX26_DIR) modules
	touch -c $@

$(LINUX26_DIR)/vmlinux: $(LINUX26_DIR)/.depend_done $(STAGING_DIR)/include/linux/version.h
	$(MAKE) $(LINUX26_MAKE_FLAGS) -C $(LINUX26_DIR) vmlinux
	$(MAKE) $(LINUX26_MAKE_FLAGS) -C $(LINUX26_DIR) modules
	touch -c $@



#-----------------------------------------------------------------------------------
# Rule can be enabled by setting
# LINUX26_TARGET:= $(TARGET_DIR)/boot/$(LINUX26_BINLOC)
#
$(TARGET_DIR)/boot/$(LINUX26_FORMAT): $(LINUX26_DIR)/$(LINUX26_FORMAT)
	[ -d $(TARGET_DIR)/boot/ ] || mkdir $(TARGET_DIR)/boot
	cp -a $(LINUX26_DIR)/$(LINUX26_FORMAT) $(LINUX26_DIR)/System.map $(TARGET_DIR)/boot/$(LINUX26_FORMAT)
	touch -c $@

#-----------------------------------------------------------------------------------
# Rule can be enabled by setting
# LINUX26_TARGET:= $(BINARIES_DIR)/$(LINUX26_KERNEL)
# LINUX26_FORMAT:= vmlinux

$(BINARIES_DIR)/$(LINUX26_KERNEL): $(LINUX26_DIR)/uImage
	cp -dpf $(LINUX26_DIR)/uImage $(BINARIES_DIR)/$(LINUX26_KERNEL)
	cp -dpf $(LINUX26_DIR)/uImage /tftpboot/$(LINUX26_KERNEL)
	mkdir -p $(TARGET_DIR)/boot/
	cp -dpf $(LINUX26_DIR)/.config $(TARGET_DIR)/boot/$(BOARD_NAME)-linux-$(LINUX26_VERSION).config
	cp -dpf .config $(TARGET_DIR)/boot/$(BOARD_NAME)-buildroot.config
	cp -dpf $(BUSYBOX_DIR)/.config $(TARGET_DIR)/boot/busybox.config

$(PROJECT_BUILD_DIR)/linux.bin: $(LINUX26_DIR)/vmlinux
	${KERNEL_CROSS}objcopy -O binary -S $(LINUX26_DIR)/vmlinux $(PROJECT_BUILD_DIR)/linux.bin

$(LINUX26_DIR)/uImage: $(LINUX26_DIR)/arch/$(ARCH)/boot/uImage
	cp -dpf $(LINUX26_DIR)/arch/$(ARCH)/boot/uImage $(LINUX26_DIR)/uImage


$(PROJECT_BUILD_DIR)/xxxx: $(PROJECT_BUILD_DIR)/linux.bin $(MKIMAGE)
	gzip -v9 -c $(PROJECT_BUILD_DIR)/linux.bin > $(PROJECT_BUILD_DIR)/linux.bin.gz
	$(MKIMAGE) -A $(ARCH) \
				-O linux \
				-C gzip \
				-a 0x20008000 \
				-e 0x20008000 \
				-d $(PROJECT_BUILD_DIR)/linux.bin.gz \
				$(LINUX26_DIR)/uImage
	rm -f $(PROJECT_BUILD_DIR)/linux.bin.gz
#-----------------------------------------------------------------------------------

$(TARGET_DIR)/lib/modules/$(LINUX26_VERSION)/modules.dep: $(LINUX26_TARGET) $(TARGET_DIR)/sbin/modprobe $(LINUX26_DIR)/vmlinux
	rm -rf $(TARGET_DIR)/lib/modules/$(LINUX26_VERSION)
	rm -f $(TARGET_DIR)/sbin/cardmgr
	$(MAKE) $(LINUX26_MAKE_FLAGS) -C $(LINUX26_DIR) \
		DEPMOD=$(STAGING_DIR)/bin/$(GNU_TARGET_NAME)-depmod26 \
		INSTALL_MOD_PATH=$(TARGET_DIR) modules_install
	(cd $(TARGET_DIR)/lib/modules; \
	  rm -f drivers; \
	  ln -s $(LINUX26_VERSION)/kernel/drivers .)
	chmod a+x target/depmod.pl
	target/depmod.pl \
		-b $(TARGET_DIR)/lib/modules/$(DOWNLOAD_LINUX26_VERSION) \
		-k $(LINUX26_DIR)/vmlinux \
		-F $(LINUX26_DIR)/System.map \
		> $(TARGET_DIR)/lib/modules/$(shell cat $(LINUX26_DIR)/include/config/kernel.release 2> /dev/null)/modules.dep
	rm -f $(TARGET_DIR)/lib/modules/$(LINUX26_VERSION)/build
	touch -c $@

$(STAGING_DIR)/include/linux/version.h: $(LINUX26_DIR)/.configured
	mkdir -p $(STAGING_DIR)/include
	tar -ch -C $(LINUX26_DIR)/include -f - linux | tar -xf - -C $(STAGING_DIR)/include/
	tar -ch -C $(LINUX26_DIR)/include -f - asm | tar -xf - -C $(STAGING_DIR)/include/

linux26-menuconfig: $(LINUX26_DIR)/.patched host-sed
	[ -f $(LINUX26_DIR)/.config ] || cp $(LINUX26_KCONFIG) $(LINUX26_DIR)/.config
	$(MAKE) $(LINUX26_MAKE_FLAGS) -C $(LINUX26_DIR) menuconfig
	-[ -f $(LINUX26_DIR)/.config ] && touch $(LINUX26_DIR)/.configured

linux26: cross-depmod26 $(TARGET_DIR)/lib/modules/$(LINUX26_VERSION)/modules.dep $(LINUX26_TARGET)

linux26-source: $(DL_DIR)/$(LINUX26_SOURCE)

# This has been renamed so we do _NOT_ by default run this on 'make clean'
linux26clean:
	rm -f $(LINUX26_TARGET)
	rm -f $(PROJECT_BUILD_DIR)/linux.bin
	rm -f $(LINUX26_DIR)/uImage
	-$(MAKE) PATH=$(TARGET_PATH) -C $(LINUX26_DIR) clean

linux26-dirclean:
	rm -f $(LINUX26_TARGET)
	rm -f $(PROJECT_BUILD_DIR)/linux.bin
	rm -rf $(LINUX26_DIR)

linux-update:
	cp -dpf $(LINUX26_DIR)/.config $(LINUX26_KCONFIG)

linux-test:
	@echo "LINUX_HEADERS_VERSION" $(LINUX_HEADERS_VERSION)
	@echo "BR2_PACKAGE_LINUX" $(BR2_PACKAGE_LINUX)
	@echo "BR2_CUSTOM_DOWNLOAD_LINUX26_VERSION" $(BR2_CUSTOM_DOWNLOAD_LINUX26_VERSION)
	@echo "BR2_CUSTOM_LINUX26_VERSION" $(BR2_CUSTOM_LINUX26_VERSION)
	@echo "BR2_CUSTOM_LINUX26_RC_PATCH" $(BR2_CUSTOM_LINUX26_RC_PATCH)
	@echo "BR2_LINUX_BSP_PATCH" $(BR2_LINUX_BSP_PATCH)
	@echo "BR2_DOWNLOAD_LINUX26_VERSION" $(BR2_DOWNLOAD_LINUX26_VERSION)
	@echo "BR2_LINUX26_VERSION" $(BR2_LINUX26_VERSION)
	@echo "LINUX26_VERSION" $(LINUX26_VERSION)
	@echo "BR2_LINUX26_RC_PATCH" $(BR2_LINUX26_RC_PATCH)
	@echo "BR2_PACKAGE_LINUX26_KCONFIG" $(BR2_PACKAGE_LINUX_KCONFIG)
	@echo "LINUX26_KCONFIG" $(LINUX26_KCONFIG)
	@echo "BR2_LINUX_BIN_CUSTOM" $(BR2_LINUX_BIN_CUSTOM)
	@echo "BR2_PACKAGE_LINUX_FORMAT" $(BR2_PACKAGE_LINUX_FORMAT)
	@echo "BR2_LINUX_IN_ROOTFS" $(BR2_LINUX_IN_ROOTFS)
	@echo "BR2_LINUX_2_6_22_1" $(BR2_LINUX_2_6_22_1)