CROSS_COMPILE	?= arm-none-eabi-
#CROSS_COMPILE	?= arm-linux-gnueabihf-
build_dir       := $(CURDIR)/build-nomadik
output_dir	:= $(HOME)
rootfs		:= $(HOME)/rootfs-nhk8815.cpio
install_dir     := $(build_dir)/install
config_file     := $(build_dir)/.config
strip		:= $(CROSS_COMPILE)strip
objcopy		:= $(CROSS_COMPILE)objcopy
rootfsbase	:= $(shell basename $(rootfs))
#dtb		:= $(build_dir)/arch/arm/boot/dts/ste-nomadik-nhk15.dtb
dtb		:= $(build_dir)/arch/arm/boot/dts/ste-nomadik-s8815.dtb
makejobs	:= $(shell grep '^processor' /proc/cpuinfo | sort -u | wc -l)
makethreads	:= $(shell dc -e "$(makejobs) 1 + p")

make_options := -f Makefile \
		-j$(makethreads) -l$(makejobs) \
                ARCH=arm \
                CROSS_COMPILE=$(CROSS_COMPILE) \
                KBUILD_OUTPUT=$(build_dir)

.PHONY: help
help:
	@echo "****  Common Makefile  ****"
	@echo "make config [PLATFORM=foo] - configure for platform \"foo\""
	@echo "make build - build the kernel and produce a RAMdisk image"
	@echo
	@echo "example:"
	@echo "make -f nomadik.mak config"
	@echo "make -f nomadik.mak build"

.PHONY: have-rootfs
have-rootfs:
	@if [ ! -f $(rootfs) ] ; then \
	     echo "ERROR: no rootfs at $(rootfs)" ; \
	     echo "This is needed to boot the system." ; \
	     echo "ABORTING." ; \
	     exit 1 ; \
	else \
	     echo "Rootfs available at $(rootfs)" ; \
	fi

.PHONY: have-crosscompiler
have-crosscompiler:
	@echo -n "Check that $(CROSS_COMPILE)gcc is available..."
	@which $(CROSS_COMPILE)gcc > /dev/null ; \
	if [ ! $$? -eq 0 ] ; then \
	   echo "ERROR: cross-compiler $(CROSS_COMPILE)gcc not in PATH=$$PATH!" ; \
	   echo "ABORTING." ; \
	   exit 1 ; \
	else \
	   echo "OK" ;\
	fi

config-pristine: have-rootfs
	@mkdir -p $(build_dir)
	@cp $(rootfs) $(build_dir)
	$(MAKE) $(make_options) nhk8815_defconfig
	yes "" | make $(make_options) oldconfig

config-base: FORCE
	@mkdir -p $(build_dir)
	@if [ -r $(config_file) ] ; then \
		rm $(config_file) ; \
	fi
	$(MAKE) $(make_options) nhk8815_defconfig

# Config options needed to bring up rootfs on distros
config-distro: config-base have-rootfs
	@cp $(rootfs) $(build_dir)/$(rootfsbase)
	$(CURDIR)/scripts/config --file $(config_file) \
	--enable PARTITION_ADVANCED \
	--enable LDM_PARTITION \
	--enable MSDOS_PARTITION \
	--enable DEVTMPFS \
	--enable CGROUPS \
	--enable CGROUP_FREEZER \
	--enable CGROUP_DEVICE \
	--enable CPUSETS \
	--enable PROC_PID_CPUSET \
	--enable CGROUP_CPUACCT \
	--enable RESOURCE_COUNTERS \
	--enable CGROUP_MEM_RES_CTLR \
	--enable CGROUP_MEM_RES_CTLR_DISABLED \
	--enable CGROUP_MEM_RES_CTLR_SWAP \
	--enable CGROUP_SCHED \
	--enable FAIR_GROUP_SCHED \
	--enable BLK_CGROUP \
	--enable NAMESPACES \
	--enable SCHED_AUTOGROUP \
	--enable FHANDLE \
	--enable SWAP \
	--enable AUTOFS4_FS \
	--enable BSD_PROCESS_ACCT \
	--enable BSD_PROCESS_ACCT_V3 \
	--enable TASKSTATS \
	--enable TASK_DELAY_ACCT \
	--enable TASK_XACCT \
	--enable TASK_IO_ACCOUNTING \
	--enable BUILD_BIN2C \
	--enable IKCONFIG \
	--enable IKCONFIG_PROC \
	--enable PAGE_COUNTER \
	--enable MEMCG \
	--enable MEMCG_SWAP \
	--enable MEMCG_SWAP_ENABLED \
	--enable MEMCG_KMEM \
	--enable CGROUP_PERF \
	--enable CGROUP_WRITEBACK \
	--enable USER_NS \
	--enable BLK_DEV_BSG \
	--enable BLK_DEV_BSGLIB \
	--enable BLK_DEV_INTEGRITY \
	--enable NET_INGRESS \
	--enable IP_ADVANCED_ROUTER \
	--set-str UEVENT_HELPER_PATH "" \
	--enable WANT_DEV_COREDUMP \
	--enable DEV_COREDUMP \
	--enable CHR_DEV_SG \
	--enable KEYS \
	--enable ENCRYPTED_KEYS \
	--enable SECURITY \
	--enable SECURITYFS \
	--enable SECURITY_NETWORK \
	--enable SECURITY_NETWORK_XFRM \
	--enable SECURITY_PATH \
	--enable INTEGRITY \
	--enable CRYPTO_USER_API \
	--enable CRYPTO_USER_API_HASH \
	--enable CRYPTO_USER_API_SKCIPHER \
	--enable CRYPTO_USER_API_AEAD \
	--enable ARM_CRYPTO \
	--enable CRYPTO_SHA1_ARM \
	--enable CRYPTO_SHA256_ARM \
	--enable CRYPTO_SHA512_ARM \
	--enable CRYPTO_AES_ARM \
	--enable BINARY_PRINTF \
	--enable MD \
	--enable BLK_DEV_DM_BUILTIN \
	--enable BLK_DEV_DM \
	--enable DM_CRYPT \
	--enable DM_UEVENT

config-bfq: config-base
	@echo "Enabling BFQ"
	$(CURDIR)/scripts/config --file $(config_file) \
	--enable IOSCHED_BFQ \
	--enable DEFAULT_BFQ \
	--disable IOSCHED_DEADLINE \
	--disable IOSCHED_CFQ

config-initramfs: config-base have-rootfs
	@cp $(rootfs) $(build_dir)/$(rootfsbase)
	# Configure in the initramfs
	$(CURDIR)/scripts/config --file $(config_file) \
	--enable BLK_DEV_INITRD \
	--set-str INITRAMFS_SOURCE $(rootfsbase) \
	--enable RD_GZIP \
	--enable INITRAMFS_COMPRESSION_GZIP

config-mainlined-features: config-base
	# Then reconfigure various stuff
	$(CURDIR)/scripts/config --file $(config_file) \
	--enable DEBUG_FS \
	--disable MMC_DEBUG \
	--disable DEBUG_GPIO \
	--enable MTD \
	--enable MTD_PARTITIONS \
	--enable MTD_CMDLINE_PARTS \
	--enable MTD_NAND \
	--enable MTD_NAND_FSMC \
	--enable HW_RANDOM \
	--enable HW_RANDOM_NOMADIK \
	--enable RTC \
	--enable RTC_DRV_PL031 \
	--enable DMADEVICES \
	--enable AMBA_PL08X \
	--enable I2C_NOMADIK \
	--enable MMC \
	--enable MMC_ARMMMCI \
	--enable NOMADIK_MTU_SCHED_CLOCK \
	--enable NEW_LEDS \
	--enable LEDS_CLASS \
	--enable LEDS_GPIO \
	--enable LEDS_TRIGGERS \
	--enable LEDS_TRIGGER_HEARTBEAT \
	--enable KEYBOARD_GPIO \
	--enable REGULATOR \
	--enable NO_HZ_COMMON \
	--enable NO_HZ_IDLE \
	--enable HIGH_RES_TIMERS \
	--enable IIO \
	--enable IIO_ST_ACCEL_3AXIS \
	--enable IIO_ST_ACCEL_I2C_3AXIS \
	--disable IIO_ST_ACCEL_SPI_3AXIS \
	--enable MFD_STMPE \
	--enable STMPE_I2C \
	--enable KEYBOARD_STMPE \
	--enable GPIO_STMPE \
	--enable IIO_BUFFER \
	--enable IIO_TRIGGER \
	--enable MFD \
	--enable MFD_STW481X \
	--enable PWM \
	--enable PWM_SYSFS \
	--enable PWM_STMPE \
	--enable BACKLIGHT_LCD_SUPPORT \
	--enable BACKLIGHT_CLASS_DEVICE \
	--enable BACKLIGHT_PWM \
	--enable SPI \
	--enable SPI_MASTER \
	--enable SPI_GPIO \
	--disable FB_ARMCLCD \
	--enable CMA \
	--enable FB \
	--enable DRM \
	--enable DRM_PL111 \
	--enable FRAMEBUFFER_CONSOLE \
	--enable DRM_PANEL \
	--enable DRM_PANEL_TPO_TPG110 \
	--enable DRM_BRIDGE \
	--enable DRM_PANEL_BRIDGE \
	--enable LOGO \
	--enable INPUT_TOUCHSCREEN \
	--enable TOUCHSCREEN_TSC2004

# For early printk
config-earlydebug: config-base
	$(CURDIR)/scripts/config --file $(config_file) \
	--enable DEBUG_LL \
	--enable EARLY_PRINTK \
	--set-str CMDLINE "root=/dev/ram0 console=ttyAMA1,115200n8 earlyprintk"

config-devicetree: config-base
	# Configure in the optional device tree if available
	if [ -r $(dtb) ] ; then \
	$(CURDIR)/scripts/config --file $(config_file) \
	--enable USE_OF \
	--enable ARM_APPENDED_DTB \
	--enable ARM_ATAG_DTB_COMPAT \
	--enable ATAGS \
	--enable PROC_DEVICETREE ; \
	fi

config-multiplatform: config-base
	$(CURDIR)/scripts/config --file $(config_file) \
	--disable ARCH_MULTI_V7 \
	--enable ARCH_MULTI_V5 \
	--enable ARCH_NOMADIK

config-dmatest: config-base config-mainlined-features
	$(CURDIR)/scripts/config --file $(config_file) \
	--enable DMATEST

config: have-rootfs config-base config-mainlined-features config-devicetree config-multiplatform config-initramfs config-earlydebug config-dmatest
# config: config-base config-mainlined-features config-devicetree config-multiplatform config-distro FORCE
	# Reconfigure a bit
	$(CURDIR)/scripts/config --file $(config_file) \
	--enable DEBUG_FS \
	--enable COMMON_CLK_DEBUG \
	--enable USB_SUPPORT \
	--enable USB \
	--enable USB_MUSB_HDRC \
	--enable USB_MUSB_HOST \
	--enable USB_MUSB_NOMADIK
	yes "" | make $(make_options) oldconfig

menuconfig: FORCE
	$(MAKE) $(make_options) menuconfig

saveconfig: config-base config-mainlined-features config-devicetree config-multiplatform FORCE
	yes "" | make $(make_options) oldconfig
	$(MAKE) $(make_options) savedefconfig
	cp $(build_dir)/defconfig arch/arm/configs/nhk8815_defconfig

updateconfig: config-base FORCE
	yes "" | make $(make_options) oldconfig
	$(MAKE) $(make_options) savedefconfig
	cp $(build_dir)/defconfig arch/arm/configs/nhk8815_defconfig

check-bindings: FORCE
	$(MAKE) $(make_options) dt_binding_check -k $(make_flags)
	$(MAKE) $(make_options) dtbs_check -k $(make_flags)

build-zimage: have-crosscompiler FORCE
	$(MAKE) $(make_options) -j 4 zImage CONFIG_DEBUG_SECTION_MISMATCH=y

build-dtbs: FORCE
	$(MAKE) $(make_options) -j 4 dtbs CONFIG_DEBUG_SECTION_MISMATCH=y

build: have-rootfs have-crosscompiler build-zimage build-dtbs FORCE
	@echo "Copy zImage to $(output_dir)/zImage..."
	@if [ -r $(build_dir)/arch/arm/boot/zImage ] ; then \
	    cp $(build_dir)/arch/arm/boot/zImage $(output_dir)/zImage ; \
	fi
	@if [ -r $(dtb) ] ; then \
	   echo "Catenate DTB onto zImage ..." ; \
	   cat $(dtb) >> $(output_dir)/zImage ; \
	fi
	# Generate uImage
	mkimage \
		-A arm \
		-O linux \
		-T kernel \
		-C none \
		-a 0x00008000 \
		-e 0x00008000 \
		-n "Nomadik Linux kernel" \
		-d $(output_dir)/zImage \
		$(output_dir)/uImage
	# If we have a TFTP boot directory
	@if [ -w /var/lib/tftpboot ] ; then \
	  echo "copy uImage to /var/lib/tftpboot" ; \
	  cp $(output_dir)/uImage /var/lib/tftpboot ; \
	fi
	@echo "Boot from serial:"
	@echo "loady"
	@echo "In minicom type Control-AS to access the upload feature, select ymodem, select uImage"
	@echo "bootm"
	@echo "Config networking after boot:"
	@echo "ifconfig eth0 hw ether 12:34:56:78:90:12"
	@echo "ifconfig eth0 169.254.1.2 netmask 255.255.255.0 up"
	@echo "route add default gw 169.254.1.1"
	@echo "Boot from ethernet:"
	@echo "setenv bootargs console=ttyAMA1,115200n8 root=/dev/mmcblk0p1 rw rootwait rootfstype=ext4 init=/sbin/init"
	@echo "setenv serverip 169.254.1.1;setenv ipaddr 169.254.1.2;setenv bootfile uImage;tftpboot;bootm"

TAGS: FORCE
	$(MAKE) $(make_options) TAGS

clean:
	$(MAKE) -f Makefile clean
	rm -f $(module_files)
	rm -rf build

# Rules without commands or prerequisites that do not match a file name
# are considered to always change when make runs. This means that any rule
# that depends on FORCE will always be remade also.
FORCE: