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134 lines
5.7 KiB
Makefile
134 lines
5.7 KiB
Makefile
#
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# kbuild file for firmware/
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#
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# Create $(fwabs) from $(CONFIG_EXTRA_FIRMWARE_DIR) -- if it doesn't have a
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# leading /, it's relative to $(srctree).
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fwdir := $(subst ",,$(CONFIG_EXTRA_FIRMWARE_DIR))
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fwabs := $(addprefix $(srctree)/,$(filter-out /%,$(fwdir)))$(filter /%,$(fwdir))
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fw-external-y := $(subst ",,$(CONFIG_EXTRA_FIRMWARE))
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# There are three cases to care about:
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# 1. Building kernel with CONFIG_FIRMWARE_IN_KERNEL=y -- $(fw-shipped-y) should
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# include the firmware files to include, according to .config
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# 2. 'make modules_install', which will install firmware for modules, and
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# _also_ for the in-kernel drivers when CONFIG_FIRMWARE_IN_KERNEL=n
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# 3. 'make firmware_install', which installs all firmware, unconditionally.
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# For the former two cases we want $(fw-shipped-y) and $(fw-shipped-m) to be
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# accurate. In the latter case it doesn't matter -- it'll use $(fw-shipped-all).
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# But be aware that the config file might not be included at all.
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fw-shipped-$(CONFIG_SMCTR) += tr_smctr.bin
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fw-shipped-$(CONFIG_SND_KORG1212) += korg/k1212.dsp
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fw-shipped-$(CONFIG_SND_MAESTRO3) += ess/maestro3_assp_kernel.fw \
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ess/maestro3_assp_minisrc.fw
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fw-shipped-$(CONFIG_SND_YMFPCI) += yamaha/ds1_ctrl.fw yamaha/ds1_dsp.fw \
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yamaha/ds1e_ctrl.fw
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fw-shipped-$(CONFIG_USB_KAWETH) += kaweth/new_code.bin kaweth/trigger_code.bin \
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kaweth/new_code_fix.bin \
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kaweth/trigger_code_fix.bin
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fw-shipped-all := $(fw-shipped-y) $(fw-shipped-m) $(fw-shipped-)
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# Directories which we _might_ need to create, so we have a rule for them.
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firmware-dirs := $(sort $(patsubst %,$(objtree)/$(obj)/%/,$(dir $(fw-external-y) $(fw-shipped-all))))
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quiet_cmd_mkdir = MKDIR $(patsubst $(objtree)/%,%,$@)
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cmd_mkdir = mkdir -p $@
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quiet_cmd_ihex = IHEX $@
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cmd_ihex = $(OBJCOPY) -Iihex -Obinary $< $@
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quiet_cmd_ihex2fw = IHEX2FW $@
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cmd_ihex2fw = $(objtree)/$(obj)/ihex2fw $< $@
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quiet_cmd_h16tofw = H16TOFW $@
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cmd_h16tofw = $(objtree)/$(obj)/ihex2fw -w $< $@
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quiet_cmd_fwbin = MK_FW $@
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cmd_fwbin = FWNAME="$(patsubst firmware/%.gen.S,%,$@)"; \
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FWSTR="$(subst /,_,$(subst .,_,$(subst -,_,$(patsubst \
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firmware/%.gen.S,%,$@))))"; \
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ASM_WORD=$(if $(CONFIG_64BIT),.quad,.long); \
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ASM_ALIGN=$(if $(CONFIG_64BIT),3,2); \
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PROGBITS=$(if $(CONFIG_ARM),%,@)progbits; \
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echo "/* Generated by firmware/Makefile */" > $@;\
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echo " .section .rodata" >>$@;\
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echo " .p2align $${ASM_ALIGN}" >>$@;\
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echo "_fw_$${FWSTR}_bin:" >>$@;\
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echo " .incbin \"$(2)\"" >>$@;\
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echo "_fw_end:" >>$@;\
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echo " .section .rodata.str,\"aMS\",$${PROGBITS},1" >>$@;\
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echo " .p2align $${ASM_ALIGN}" >>$@;\
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echo "_fw_$${FWSTR}_name:" >>$@;\
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echo " .string \"$$FWNAME\"" >>$@;\
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echo " .section .builtin_fw,\"a\",$${PROGBITS}" >>$@;\
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echo " .p2align $${ASM_ALIGN}" >>$@;\
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echo " $${ASM_WORD} _fw_$${FWSTR}_name" >>$@;\
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echo " $${ASM_WORD} _fw_$${FWSTR}_bin" >>$@;\
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echo " $${ASM_WORD} _fw_end - _fw_$${FWSTR}_bin" >>$@;
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# One of these files will change, or come into existence, whenever
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# the configuration changes between 32-bit and 64-bit. The .S files
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# need to change when that happens.
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wordsize_deps := $(wildcard include/config/64bit.h include/config/32bit.h \
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include/config/ppc32.h include/config/ppc64.h \
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include/config/superh32.h include/config/superh64.h \
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include/config/x86_32.h include/config/x86_64.h)
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# Workaround for make < 3.81, where .SECONDEXPANSION doesn't work.
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# It'll end up depending on these targets, so make them a PHONY rule which
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# depends on _all_ the directories in $(firmware-dirs), and it'll work out OK.
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PHONY += $(objtree)/$$(%) $(objtree)/$(obj)/$$(%)
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$(objtree)/$$(%) $(objtree)/$(obj)/$$(%): $(firmware-dirs)
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@true
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# For the $$(dir %) trick, where we need % to be expanded first.
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.SECONDEXPANSION:
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$(patsubst %,$(obj)/%.gen.S, $(fw-shipped-y)): %: $(wordsize_deps) \
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| $(objtree)/$$(dir %)
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$(call cmd,fwbin,$(patsubst %.gen.S,%,$@))
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$(patsubst %,$(obj)/%.gen.S, $(fw-external-y)): %: $(wordsize_deps) \
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include/config/builtin/firmware/dir.h | $(objtree)/$$(dir %)
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$(call cmd,fwbin,$(fwabs)/$(patsubst $(obj)/%.gen.S,%,$@))
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# The .o files depend on the binaries directly; the .S files don't.
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$(patsubst %,$(obj)/%.gen.o, $(fw-shipped-y)): %.gen.o: %
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$(patsubst %,$(obj)/%.gen.o, $(fw-external-y)): $(obj)/%.gen.o: $(fwdir)/%
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# .ihex is used just as a simple way to hold binary files in a source tree
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# where binaries are frowned upon. They are directly converted with objcopy.
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$(obj)/%: $(obj)/%.ihex | $(objtree)/$(obj)/$$(dir %)
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$(call cmd,ihex)
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# .HEX is also Intel HEX, but where the offset and length in each record
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# is actually meaningful, because the firmware has to be loaded in a certain
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# order rather than as a single binary blob. Thus, we convert them into our
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# more compact binary representation of ihex records (<linux/ihex.h>)
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$(obj)/%.fw: $(obj)/%.HEX $(obj)/ihex2fw | $(objtree)/$(obj)/$$(dir %)
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$(call cmd,ihex2fw)
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# .H16 is our own modified form of Intel HEX, with 16-bit length for records.
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$(obj)/%.fw: $(obj)/%.H16 $(obj)/ihex2fw | $(objtree)/$(obj)/$$(dir %)
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$(call cmd,h16tofw)
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$(firmware-dirs):
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$(call cmd,mkdir)
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obj-y += $(patsubst %,%.gen.o, $(fw-external-y))
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obj-$(CONFIG_FIRMWARE_IN_KERNEL) += $(patsubst %,%.gen.o, $(fw-shipped-y))
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# Remove .S files and binaries created from ihex
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# (during 'make clean' .config isn't included so they're all in $(fw-shipped-))
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targets := $(fw-shipped-) $(patsubst $(obj)/%,%, \
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$(shell find $(obj) -name \*.gen.S 2>/dev/null))
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# Without this, built-in.o won't be created when it's empty, and the
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# final vmlinux link will fail.
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obj-n := dummy
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hostprogs-y := ihex2fw
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