# SPDX-License-Identifier: GPL-2.0
#
# kbuild file for firmware/
#

# Create $(fwabs) from $(CONFIG_EXTRA_FIRMWARE_DIR) -- if it doesn't have a
# leading /, it's relative to $(srctree).
fwdir := $(subst $(quote),,$(CONFIG_EXTRA_FIRMWARE_DIR))
fwabs := $(addprefix $(srctree)/,$(filter-out /%,$(fwdir)))$(filter /%,$(fwdir))

fw-external-y := $(subst $(quote),,$(CONFIG_EXTRA_FIRMWARE))

ifdef CONFIG_LGE_TOUCH_FW_PATH
fwpath := $(subst ",,$(CONFIG_LGE_TOUCH_FW_PATH))
ifdef CONFIG_LGE_TOUCH_MODULE_DETECT
lge_touch_image_files := $(wildcard $(srctree)/firmware/$(fwpath)/*/*)
else
lge_touch_image_files := $(wildcard $(srctree)/firmware/$(fwpath)/*)
endif
lge_touch_firmware := $(subst $(srctree)/firmware/,,$(lge_touch_image_files))
fw-shipped-$(CONFIG_LGE_TOUCH_CORE_BASE) += $(lge_touch_firmware)
endif
fw-shipped-$(CONFIG_INPUT_SAR_ALMF04QFN_2_3CH) += almf04/almf04_2CH_V2.04T.fw \
						almf04/almf04_2CH_V22.04T.fw
fw-shipped-$(CONFIG_INPUT_SAR_ALMF04QFN_2_3CH_NIT) += almf04/ALMF04_Sar3CH_NIT_V3.11T.fw

# LGE USB lattice FPGA
fw-shipped-$(CONFIG_LGE_USB_LATTICE_SLS11HC) += lattice/u11hc_spi_lge_des_impl_1_19M.bin
fw-shipped-all := $(fw-shipped-y) $(fw-shipped-m) $(fw-shipped-)

quiet_cmd_ihex  = IHEX    $@
      cmd_ihex  = $(OBJCOPY) -Iihex -Obinary $< $@

quiet_cmd_copy  = COPY    $@
      cmd_copy  = cp $(srctree)/$@ $@

quiet_cmd_ihex2fw  = IHEX2FW $@
      cmd_ihex2fw  = $(objtree)/$(obj)/ihex2fw $< $@

quiet_cmd_h16tofw  = H16TOFW $@
      cmd_h16tofw  = $(objtree)/$(obj)/ihex2fw -w $< $@

quiet_cmd_fwbin = MK_FW   $@
      cmd_fwbin = FWNAME="$(patsubst firmware/%.gen.S,%,$@)";		     \
		  FWSTR="$(subst /,_,$(subst .,_,$(subst -,_,$(patsubst	     \
				firmware/%.gen.S,%,$@))))";		     \
		  ASM_WORD=$(if $(CONFIG_64BIT),.quad,.long);		     \
		  ASM_ALIGN=$(if $(CONFIG_64BIT),3,2);			     \
		  PROGBITS=$(if $(CONFIG_ARM),%,@)progbits;		     \
		  echo "/* Generated by firmware/Makefile */"		> $@;\
		  echo "    .section .rodata"				>>$@;\
		  echo "    .p2align $${ASM_ALIGN}"			>>$@;\
		  echo "_fw_$${FWSTR}_bin:"				>>$@;\
		  echo "    .incbin \"$(2)\""				>>$@;\
		  echo "_fw_end:"					>>$@;\
		  echo "   .section .rodata.str,\"aMS\",$${PROGBITS},1"	>>$@;\
		  echo "    .p2align $${ASM_ALIGN}"			>>$@;\
		  echo "_fw_$${FWSTR}_name:"				>>$@;\
		  echo "    .string \"$$FWNAME\""			>>$@;\
		  echo "    .section .builtin_fw,\"a\",$${PROGBITS}"	>>$@;\
		  echo "    .p2align $${ASM_ALIGN}"			>>$@;\
		  echo "    $${ASM_WORD} _fw_$${FWSTR}_name"		>>$@;\
		  echo "    $${ASM_WORD} _fw_$${FWSTR}_bin"		>>$@;\
		  echo "    $${ASM_WORD} _fw_end - _fw_$${FWSTR}_bin"	>>$@;

# One of these files will change, or come into existence, whenever
# the configuration changes between 32-bit and 64-bit. The .S files
# need to change when that happens.
wordsize_deps := $(wildcard include/config/64bit.h include/config/32bit.h \
		include/config/ppc32.h include/config/ppc64.h \
		include/config/superh32.h include/config/superh64.h \
		include/config/x86_32.h include/config/x86_64.h \
		firmware/Makefile)

# For the $$(dir %) trick, where we need % to be expanded first.
.SECONDEXPANSION:
ifneq ($(objtree),$(srctree))
$(patsubst %,$(obj)/%, $(fw-shipped-y)): %: %.gen.S
	$(call cmd,copy)
endif
$(patsubst %,$(obj)/%.gen.S, $(fw-shipped-y)): %: $(wordsize_deps)
	$(call cmd,fwbin,$(patsubst %.gen.S,%,$@))
$(patsubst %,$(obj)/%.gen.S, $(fw-external-y)): %: $(wordsize_deps) \
		include/config/extra/firmware/dir.h
	$(call cmd,fwbin,$(fwabs)/$(patsubst $(obj)/%.gen.S,%,$@))

# The .o files depend on the binaries directly; the .S files don't.
$(patsubst %,$(obj)/%.gen.o, $(fw-shipped-y)): %.gen.o: %
$(patsubst %,$(obj)/%.gen.o, $(fw-external-y)): $(obj)/%.gen.o: $(fwdir)/%

obj-y				 += $(patsubst %,%.gen.o, $(fw-external-y))
obj-$(CONFIG_FIRMWARE_IN_KERNEL) += $(patsubst %,%.gen.o, $(fw-shipped-y))

ifeq ($(KBUILD_SRC),)
# Makefile.build only creates subdirectories for O= builds, but external
# firmware might live outside the kernel source tree
_dummy := $(foreach d,$(addprefix $(obj)/,$(dir $(fw-external-y))), $(shell [ -d $(d) ] || mkdir -p $(d)))
endif

targets := $(patsubst $(obj)/%,%, \
                                $(shell find $(obj) -name \*.gen.S 2>/dev/null))
# Without this, built-in.o won't be created when it's empty, and the
# final vmlinux link will fail.
obj- := dummy
