rpg_sd: Initial rewrite of unified driver

This is a reimplementation of the original rpg_sd driver. After
checking the differences, we are able to unify rpg_sd, ak2_sd and
r4idsn_sd into a single source.

Assuming rpg_sd as the base driver, the differences are the following:
- ak2/r4idsn: C0 command returns the state in high 4 bits instead of
  low 4 bits
- r4idsn: SDIO commands are 0xAB instead of 0xD5
- ak2 needs a second version that disables CMD25 writes, as this is
  broken on some flashcarts.

.gitignore

@@ -4,9 +4,10 @@
 !prebuilts/*.dldi
 *.elf
 *.DS_Store
+*.nds
 
 # Build Directory
-*build/
+*build*/
 out
 artifacts
 

build.sh

@@ -22,6 +22,21 @@ for FILE in *; do
         make -C $FILE clean
         make -C $FILE SDHC=1
         cp $FILE/*.dldi $OUT
+    elif [[ $FILE == "rpg_sd" ]]; then
+        # Clean before starting
+        make -C $FILE clean
+        make -C $FILE -f Makefile_ak2 clean
+        make -C $FILE -f Makefile_ak2_singlewrite clean
+        make -C $FILE -f Makefile_r4idsn clean
+
+        # Build everything
+        make -C $FILE
+        make -C $FILE -f Makefile_ak2 clean
+        make -C $FILE -f Makefile_ak2_singlewrite
+        make -C $FILE -f Makefile_r4idsn
+
+        # Copy to out
+        cp $FILE/*.dldi $OUT
     else
         make -C $FILE clean
         make -C $FILE

source/rpg_sd/Makefile

@@ -0,0 +1,132 @@
+#---------------------------------------------------------------------------------
+.SUFFIXES:
+#---------------------------------------------------------------------------------
+
+ifeq ($(strip $(DEVKITARM)),)
+$(error "Please set DEVKITARM in your environment. export DEVKITARM=<path to>devkitARM")
+endif
+
+include $(DEVKITARM)/ds_rules
+
+#---------------------------------------------------------------------------------
+# TARGET is the name of the output
+# BUILD is the directory where object files & intermediate files will be placed
+# SOURCES is a list of directories containing source code
+# DATA is a list of directories containing data files
+# INCLUDES is a list of directories containing header files
+# SPECS is the directory containing the important build and link files
+#---------------------------------------------------------------------------------
+export TARGET		:=	rpg_sd
+BUILD		:=	build_rpg
+SOURCES		:=	source ../../common_source
+DATA		:=	data
+INCLUDES	:=	include ../../common_source
+
+
+#---------------------------------------------------------------------------------
+# options for code generation
+#---------------------------------------------------------------------------------
+ARCH	:=	-mthumb-interwork
+
+CFLAGS	:=	-g -Wall -O2\
+			-mcpu=arm7tdmi -mtune=arm7tdmi -fomit-frame-pointer\
+			-ffast-math -ffreestanding \
+			$(ARCH)
+
+CFLAGS	+=	$(INCLUDE) -DARM7 -fPIC
+
+CXXFLAGS	:= $(CFLAGS) -fno-rtti -fno-exceptions
+
+ASFLAGS	:=	-g $(ARCH) $(INCLUDE)
+LDFLAGS	=	-nostartfiles -nostdlib -T dldi.ld -g $(ARCH) -Wl,-Map,$(TARGET).map,--gc-sections -ffunction-sections -fdata-sections
+
+LIBS	:=
+
+#---------------------------------------------------------------------------------
+# list of directories containing libraries, this must be the top level containing
+# include and lib
+#---------------------------------------------------------------------------------
+LIBDIRS	:=	$(LIBNDS)
+
+
+#---------------------------------------------------------------------------------
+# no real need to edit anything past this point unless you need to add additional
+# rules for different file extensions
+#---------------------------------------------------------------------------------
+ifneq ($(BUILD),$(notdir $(CURDIR)))
+#---------------------------------------------------------------------------------
+
+export OUTPUT	:=	$(CURDIR)/$(TARGET)
+
+export VPATH	:=	$(foreach dir,$(SOURCES),$(CURDIR)/$(dir)) \
+			$(foreach dir,$(DATA),$(CURDIR)/$(dir))
+
+export DEPSDIR	:=	$(CURDIR)/$(BUILD)
+
+CFILES		:=	$(foreach dir,$(SOURCES),$(notdir $(wildcard $(dir)/*.c)))
+CPPFILES	:=	$(foreach dir,$(SOURCES),$(notdir $(wildcard $(dir)/*.cpp)))
+SFILES		:=	$(foreach dir,$(SOURCES),$(notdir $(wildcard $(dir)/*.s)))
+BINFILES	:=	$(foreach dir,$(DATA),$(notdir $(wildcard $(dir)/*.*)))
+
+#---------------------------------------------------------------------------------
+# use CXX for linking C++ projects, CC for standard C
+#---------------------------------------------------------------------------------
+ifeq ($(strip $(CPPFILES)),)
+#---------------------------------------------------------------------------------
+	export LD	:=	$(CC)
+#---------------------------------------------------------------------------------
+else
+#---------------------------------------------------------------------------------
+	export LD	:=	$(CXX)
+#---------------------------------------------------------------------------------
+endif
+#---------------------------------------------------------------------------------
+
+export OFILES	:=	$(addsuffix .o,$(BINFILES)) \
+			$(CPPFILES:.cpp=.o) $(CFILES:.c=.o) $(SFILES:.s=.o)
+
+export INCLUDE	:=	$(foreach dir,$(INCLUDES),-I$(CURDIR)/$(dir)) \
+			$(foreach dir,$(LIBDIRS),-I$(dir)/include) \
+			-I$(CURDIR)/$(BUILD)
+
+export LIBPATHS	:=	$(foreach dir,$(LIBDIRS),-L$(dir)/lib)
+
+.PHONY: $(BUILD) clean all
+
+#---------------------------------------------------------------------------------
+all: $(BUILD)
+
+$(BUILD):
+	@[ -d $@ ] || mkdir -p $@
+	@$(MAKE) --no-print-directory -C $(BUILD) -f $(CURDIR)/Makefile
+
+#---------------------------------------------------------------------------------
+clean:
+	@echo clean ...
+	@rm -fr $(BUILD) $(TARGET).dldi $(TARGET).elf
+
+
+#---------------------------------------------------------------------------------
+else
+
+DEPENDS	:=	$(OFILES:.o=.d)
+
+#---------------------------------------------------------------------------------
+# main targets
+#---------------------------------------------------------------------------------
+$(OUTPUT).dldi	:	$(OUTPUT).elf
+$(OUTPUT).elf	:	$(OFILES)
+
+
+#---------------------------------------------------------------------------------
+%.dldi: %.elf
+	@$(OBJCOPY) -O binary $< $@
+	@echo built ... $(notdir $@)
+
+
+-include $(DEPENDS)
+
+
+#---------------------------------------------------------------------------------------
+endif
+#---------------------------------------------------------------------------------------

source/rpg_sd/Makefile_ak2

@@ -0,0 +1,132 @@
+#---------------------------------------------------------------------------------
+.SUFFIXES:
+#---------------------------------------------------------------------------------
+
+ifeq ($(strip $(DEVKITARM)),)
+$(error "Please set DEVKITARM in your environment. export DEVKITARM=<path to>devkitARM")
+endif
+
+include $(DEVKITARM)/ds_rules
+
+#---------------------------------------------------------------------------------
+# TARGET is the name of the output
+# BUILD is the directory where object files & intermediate files will be placed
+# SOURCES is a list of directories containing source code
+# DATA is a list of directories containing data files
+# INCLUDES is a list of directories containing header files
+# SPECS is the directory containing the important build and link files
+#---------------------------------------------------------------------------------
+export TARGET		:=	ak2_sd
+BUILD		:=	build_ak2
+SOURCES		:=	source ../../common_source
+DATA		:=	data
+INCLUDES	:=	include ../../common_source
+
+
+#---------------------------------------------------------------------------------
+# options for code generation
+#---------------------------------------------------------------------------------
+ARCH	:=	-mthumb-interwork -DAK2
+
+CFLAGS	:=	-g -Wall -O2\
+			-mcpu=arm7tdmi -mtune=arm7tdmi -fomit-frame-pointer\
+			-ffast-math -ffreestanding \
+			$(ARCH)
+
+CFLAGS	+=	$(INCLUDE) -DARM7 -fPIC
+
+CXXFLAGS	:= $(CFLAGS) -fno-rtti -fno-exceptions
+
+ASFLAGS	:=	-g $(ARCH) $(INCLUDE)
+LDFLAGS	=	-nostartfiles -nostdlib -T dldi.ld -g $(ARCH) -Wl,-Map,$(TARGET).map,--gc-sections -ffunction-sections -fdata-sections
+
+LIBS	:=
+
+#---------------------------------------------------------------------------------
+# list of directories containing libraries, this must be the top level containing
+# include and lib
+#---------------------------------------------------------------------------------
+LIBDIRS	:=	$(LIBNDS)
+
+
+#---------------------------------------------------------------------------------
+# no real need to edit anything past this point unless you need to add additional
+# rules for different file extensions
+#---------------------------------------------------------------------------------
+ifneq ($(BUILD),$(notdir $(CURDIR)))
+#---------------------------------------------------------------------------------
+
+export OUTPUT	:=	$(CURDIR)/$(TARGET)
+
+export VPATH	:=	$(foreach dir,$(SOURCES),$(CURDIR)/$(dir)) \
+			$(foreach dir,$(DATA),$(CURDIR)/$(dir))
+
+export DEPSDIR	:=	$(CURDIR)/$(BUILD)
+
+CFILES		:=	$(foreach dir,$(SOURCES),$(notdir $(wildcard $(dir)/*.c)))
+CPPFILES	:=	$(foreach dir,$(SOURCES),$(notdir $(wildcard $(dir)/*.cpp)))
+SFILES		:=	$(foreach dir,$(SOURCES),$(notdir $(wildcard $(dir)/*.s)))
+BINFILES	:=	$(foreach dir,$(DATA),$(notdir $(wildcard $(dir)/*.*)))
+
+#---------------------------------------------------------------------------------
+# use CXX for linking C++ projects, CC for standard C
+#---------------------------------------------------------------------------------
+ifeq ($(strip $(CPPFILES)),)
+#---------------------------------------------------------------------------------
+	export LD	:=	$(CC)
+#---------------------------------------------------------------------------------
+else
+#---------------------------------------------------------------------------------
+	export LD	:=	$(CXX)
+#---------------------------------------------------------------------------------
+endif
+#---------------------------------------------------------------------------------
+
+export OFILES	:=	$(addsuffix .o,$(BINFILES)) \
+			$(CPPFILES:.cpp=.o) $(CFILES:.c=.o) $(SFILES:.s=.o)
+
+export INCLUDE	:=	$(foreach dir,$(INCLUDES),-I$(CURDIR)/$(dir)) \
+			$(foreach dir,$(LIBDIRS),-I$(dir)/include) \
+			-I$(CURDIR)/$(BUILD)
+
+export LIBPATHS	:=	$(foreach dir,$(LIBDIRS),-L$(dir)/lib)
+
+.PHONY: $(BUILD) clean all
+
+#---------------------------------------------------------------------------------
+all: $(BUILD)
+
+$(BUILD):
+	@[ -d $@ ] || mkdir -p $@
+	@$(MAKE) --no-print-directory -C $(BUILD) -f $(CURDIR)/Makefile_ak2
+
+#---------------------------------------------------------------------------------
+clean:
+	@echo clean ...
+	@rm -fr $(BUILD) $(TARGET).dldi $(TARGET).elf
+
+
+#---------------------------------------------------------------------------------
+else
+
+DEPENDS	:=	$(OFILES:.o=.d)
+
+#---------------------------------------------------------------------------------
+# main targets
+#---------------------------------------------------------------------------------
+$(OUTPUT).dldi	:	$(OUTPUT).elf
+$(OUTPUT).elf	:	$(OFILES)
+
+
+#---------------------------------------------------------------------------------
+%.dldi: %.elf
+	@$(OBJCOPY) -O binary $< $@
+	@echo built ... $(notdir $@)
+
+
+-include $(DEPENDS)
+
+
+#---------------------------------------------------------------------------------------
+endif
+#---------------------------------------------------------------------------------------