#
# Makefile and (un-)Installer for Sapphire remote control driver,
#    by Mark Lord 2012-2019.
#
MODNAME=sapphire
MODSOURCE=$(MODNAME).c
CONFLICTS=hid_topseed
BLACKLIST=/etc/modprobe.d/blacklist-$(CONFLICTS).conf
KEYMAP_SCRIPT=sapphire_keymap.sh
EXTRACT_KEYDEFS=extract_keydefs.sh
INPUT_H=$(shell [ -e /usr/include/linux/input-event-codes.h ] && echo /usr/include/linux/input-event-codes.h || echo /usr/include/linux/input.h)

## MODPARMS is not used any more, but we have to nuke old copies to prevent issues:
MODPARMS=/etc/modprobe.d/$(MODNAME).conf

CWD    = $(shell pwd -P)
KVER  ?= $(shell uname -r)
KDIR  = /lib/modules/$(KVER)
obj-m += $(MODNAME).o

#EXTRA_CFLAGS += -Werror

default: $(INPUT_H) kmod $(KEYMAP_SCRIPT)

$(INPUT_H):
	@echo "ERROR: $@: not found."
	@echo
	@echo "Please install the system development libraries first."
	@echo "Eg. on Ubuntu/Mint systems:  sudo apt-get install build-essential"
	@echo
	@exit 1

kmod:
	$(MAKE) -C $(KDIR)/build M=$(CWD) modules

$(MODNAME).ko: $(MODSOURCE) $(MODNAME).h
	$(MAKE) kmod

$(KEYMAP_SCRIPT): $(INPUT_H) $(EXTRACT_KEYDEFS) $(KEYMAP_SCRIPT).part1 $(KEYMAP_SCRIPT).part3 $(MODNAME).h $(INPUT_H)
	@bash -c "type -all gawk" >/dev/null 2>&1 || (\
		echo ;\
		echo "gawk not found, needed by installer; Aborted." ;\
		echo "For Ubuntu/Debian based systems, try this:  sudo apt-get install gawk" ;\
		echo ;\
		exit 2 ;\
	)
	chmod 0755 $(EXTRACT_KEYDEFS)
	./$(EXTRACT_KEYDEFS) $(INPUT_H) $(MODNAME).h | cat $(KEYMAP_SCRIPT).part1 - $(KEYMAP_SCRIPT).part3 > $(KEYMAP_SCRIPT)
	chmod 0755 $(KEYMAP_SCRIPT)

$(BLACKLIST):
	@echo "Creating $(BLACKLIST)"
	@echo "## $(CONFLICTS) Conflicts with $(MODNAME) driver" >  $(BLACKLIST)
	@echo "blacklist $(CONFLICTS)"                           >> $(BLACKLIST)

modinstall: $(MODNAME).ko $(KEYMAP_SCRIPT)
	$(MAKE) -C $(KDIR)/build M=$(CWD) modules_install || exit 0
	@[ -e $(KDIR)/extra/sapphire.ko -o -e $(KDIR)/extra/sapphire.ko.gz -o -e $(KDIR)/extra/sapphire.ko.xz ] || exit 1
	depmod $(KVER)
	@if [ "$(KVER)" = "$$(uname -r)" ]; then \
		rmmod $(MODNAME)   2>/dev/null ;\
		rmmod $(CONFLICTS) 2>/dev/null ;\
		./sapphire_startup.sh ;\
	else \
		exit 0 ;\
	fi

clean:
	$(MAKE) -C $(KDIR)/build M=$(CWD) clean
	-rm -f $(KEYMAP_SCRIPT)

clean_modparms:
	@if [ -e $(MODPARAMS) ]; then rm -f $(MODPARMS) ; fi ; exit 0

uninstall: clean clean_modparms
	-rmmod $(MODNAME)
	-rm -f $(BLACKLIST)
	-rm -f /usr/local/bin/$(KEYMAP_SCRIPT)
	-rm -f $(KDIR)/extra/$(MODNAME).ko
	depmod

install: $(MODNAME).ko clean_modparms modinstall $(BLACKLIST) $(KEYMAP_SCRIPT)
	install -m 0755 $(KEYMAP_SCRIPT) /usr/local/bin/
	install -m 0755 sapphire_startup.sh /usr/local/bin/

all: install