ifndef TP_MODULES
# This part runs as a normal, top-level Makefile:
X:=$(shell false)
KVER        ?= $(shell uname -r)
KBASE       ?= /lib/modules/$(KVER)
KSRC        ?= $(KBASE)/source
KBUILD      ?= $(KBASE)/build
MOD_DIR     ?= $(KBASE)/kernel
PWD         := $(shell pwd)
IDIR        := include/linux
TP_DIR      := drivers/platform/x86
TP_MODULES  := thinkpad_ec.o tp_smapi.o
SHELL       := /bin/bash

ifeq ($(HDAPS),1)
TP_MODULES  += hdaps.o
LOAD_HDAPS  := insmod ./hdaps.ko
else
LOAD_HDAPS  := :
endif

ifeq ($(FORCE_IO),1)
THINKPAD_EC_PARAM := force_io=1
else
THINKPAD_EC_PARAM :=
endif

ifneq ($(KERNELRELEASE),)
	obj-m  := $(TP_MODULES)
else
endif

DEBUG := 0

.PHONY: default clean modules load unload install check_hdaps \
	check-ver set-version create-tgz create-rpm
export TP_MODULES

#####################################################################
# Main targets

default: modules

# Build the modules thinkpad_ec.ko, tp_smapi.ko and (if HDAPS=1) hdaps.ko
modules: $(KBUILD) $(patsubst %.o,%.c,$(TP_MODULES))
	$(MAKE) -C $(KBUILD) M=$(PWD) O=$(KBUILD) modules

clean:
	rm -f tp_smapi.mod.* tp_smapi.o tp_smapi.ko .tp_smapi.*.cmd
	rm -f thinkpad_ec.mod.* thinkpad_ec.o thinkpad_ec.ko .thinkpad_ec.*.cmd
	rm -f hdaps.mod.* hdaps.o hdaps.ko .hdaps.*.cmd
	rm -f *~ *.orig *.rej
	rm -fr .tmp_versions Modules.symvers

load: check_hdaps unload modules
	@( [ `id -u` == 0 ] || { echo "Must be root to load modules"; exit 1; } )
	{ insmod ./thinkpad_ec.ko $(THINKPAD_EC_PARAM) && insmod ./tp_smapi.ko debug=$(DEBUG) && $(LOAD_HDAPS); }; :
	@echo -e '\nRecent dmesg output:' ; dmesg | tail -10

unload:
	@( [ `id -u` == 0 ] || { echo "Must be root to unload modules"; exit 1; } )
	if lsmod | grep -q '^hdaps '; then rmmod hdaps; fi
	if lsmod | grep -q '^tp_smapi '; then rmmod tp_smapi; fi
	if lsmod | grep -q '^thinkpad_ec '; then rmmod thinkpad_ec; fi
	if lsmod | grep -q '^tp_base '; then rmmod tp_base; fi  # old thinkpad_ec

check_hdaps:
ifneq ($(HDAPS),1)
	@if lsmod | grep -q '^hdaps '; then \
	echo 'The hdaps driver is loaded. Use "make HDAPS=1 ..." to'\
	'patch hdaps for compatibility with tp_smapi.'\
	'This requires a kernel source tree.'; exit 1; fi
endif

install: modules
	@( [ `id -u` == 0 ] || { echo "Must be root to install modules"; exit 1; } )
	rm -f $(MOD_DIR)/$(TP_DIR)/{thinkpad_ec,tp_smapi,tp_base}.ko
	rm -f $(MOD_DIR)/drivers/firmware/{thinkpad_ec,tp_smapi,tp_base}.ko
	rm -f $(MOD_DIR)/extra/{thinkpad_ec,tp_smapi,tp_base}.ko
ifeq ($(HDAPS),1)
	rm -f $(MOD_DIR)/drivers/platform/x86/hdaps.ko
	rm -f $(MOD_DIR)/extra/hdaps.ko
endif
	$(MAKE) -C $(KBUILD) M=$(PWD) O=$(KBUILD) modules_install
	depmod $(KVER)


#####################################################################
# Tools for preparing a release. Ignore these.

TGZ=../tp_smapi-$(VER).tgz

check-ver:
	@if [ -z "$(VER)" ]; then \
		echo "VER is unset"; \
		echo "run: $(MAKE) $(MAKECMDGOALS) VER=<release version>"; \
		exit 1 ;\
	 fi

set-version: check-ver
	perl -i -pe 's/^(tp_smapi version ).*/$${1}$(VER)/' README
	perl -i -pe 's/^(#define TP_VERSION ").*/$${1}$(VER)"/' thinkpad_ec.c tp_smapi.c
	perl -i -pe 's/^(TP_VER := ).*/$${1}$(VER)/' Makefile
	perl -i -pe 's/^(PACKAGE_VERSION=").*/$${1}$(VER)"/' dkms.conf
	perl -i -pe 's/^(Version:\s+).*/$${1}$(VER)/' tp_smapi.spec

create-tgz: check-ver
	git archive  --format=tar --prefix=tp_smapi-$(VER)/ HEAD | gzip -c > $(TGZ)
	tar tzvf $(TGZ)
	echo "Ready: $(TGZ)"

create-rpm: create-tgz
	mkdir -p rpmbuild
	rpmbuild -tb --define "_topdir $$PWD/rpmbuild" $(TGZ)


else
#####################################################################
# This part runs as a submake in kernel Makefile context:

EXTRA_CFLAGS := $(CFLAGS) -I$(M)/include
obj-m        := $(TP_MODULES)

endif