#############################################################
#
# Linux kernel targets
#
# Note:  If you have any patches to apply, create the directory
# sources/kernel-patches and put your patches in there and number
# them in the order you wish to apply them...  i.e.
#
#   patches/kernel/001-my-special-stuff.bz2
#   patches/kernel/003-gcc-Os.bz2
#   patches/kernel/004_no-warnings.bz2
#   patches/kernel/030-lowlatency-mini.bz2
#   patches/kernel/031-lowlatency-fixes-5.bz2
#   patches/kernel/099-shutup.bz2
#   etc...
#
# these patches will all be applied by the patch-kernel.sh
# script (which will also abort the build if it finds rejects)
#  -Erik
#
# It will also do patch-o-matic patches, dependant on the patch-o-matic
# TARGET and the POM_PATCHES list in the main Makefile.
#
# -Thomas.
#
#############################################################

# Encapsulate it all so not end up entangling ourselves in the 2.4 makefile.
ifeq ($(strip $(BR2_PACKAGE_LINUX_26)),y)

# Version of Linux to download and then apply patches to
DOWNLOAD_LINUX_VERSION=2.6.33.4
# Version of Linux AFTER patches
LINUX_VERSION=$(DOWNLOAD_LINUX_VERSION)-floppyfw-$(FLOPPYFW_VERSION)

LINUX_FORMAT=bzImage
LINUX_BINLOC=arch/$(ARCH)/boot/$(LINUX_FORMAT)

LINUX_DIR=$(BUILD_DIR)/linux-$(LINUX_VERSION)
LINUX_SOURCE=linux-$(DOWNLOAD_LINUX_VERSION).tar.bz2
LINUX_SITE=ftp://ftp.kernel.org/pub/linux/kernel/v2.6
LINUX_KERNEL=$(LINUX_DIR)/vmlinuz
# Used by pcmcia-cs and others
LINUX_SOURCE_DIR=$(LINUX_DIR)

LINUX_EXTRA_CFLAGS="-I$(PATCH_DIR)/kernel-2.6"


LINUX_MODULE_EXT=ko
BASE_MODULES="ip_gre ipip bridge crc32"

# The rest is in the idemods.mk for now.
IDE_MODULES="isofs zlib_deflate zlib_inflate"

PCMCIA_BASE_MODULES="i82092 pcmcia pd6729 tcic i82365 pcmcia_core rsrc_nonstatic yenta_socket"
# These should be picked in nics and so on, not nessesarily it's own package.
PCMCIA_MODULES="serial_cs synclink_cs 3c574_cs axnet_cs ibmtr_cs pcnet_cs xirc2ps_cs 3c589_cs fmvj18x_cs nmclan_cs smc91c92_cs"

LINUX_KCONFIG_26:=$(strip $(subst ",, $(LINUX_KCONFIG_26)))
#"

$(DL_DIR)/$(LINUX_SOURCE): 
	 $(WGET) -P $(DL_DIR) $(LINUX_SITE)/$(LINUX_SOURCE)

$(LINUX_DIR)/.unpacked: $(DL_DIR)/$(LINUX_SOURCE) 
	-$(RM) -r $(MODULES_DIR)/lib
	-$(RM) $(MODULES_DIR)/.stripped
	-$(RM) -r $(LINUX_DIR)
	bzcat $(DL_DIR)/$(LINUX_SOURCE) | tar $(TAR_VERBOSE) \
		-C $(BUILD_DIR) -xf -
ifneq ($(DOWNLOAD_LINUX_VERSION),$(LINUX_VERSION))
	# Rename the dir from the downloaded version to the AFTER patch version	
	mv -f $(BUILD_DIR)/linux-$(DOWNLOAD_LINUX_VERSION) $(LINUX_DIR)
	touch $(LINUX_DIR)/.unpacked
endif

$(LINUX_DIR)/.patched: $(LINUX_DIR)/.unpacked \
		$(HOSTAP_DRIVER_DIR)/.unpacked \
		patch-o-matic
	# Patching the kernel.
	$(SCRIPTS_DIR)/patch-kernel.sh $(LINUX_DIR) $(PATCH_DIR)/kernel-2.6 0 *.patch
	echo "Patched the kernel with $(PATCH_DIR)/kernel patches"

	# Patching the kernel with iptables-pom-stuff:
ifeq ($(filter $(TARGETS),patch-o-matic), patch-o-matic)
	(cd $(PATCH_O_MATIC_DIR); \
		KERNEL_DIR=$(LINUX_DIR) \
		IPTABLES_DIR=$(IPTABLES_BUILD_DIR) \
		./runme	--batch $(POM_PATCHES) \
		 );
endif
ifeq ($(filter $(TARGETS),hostap), hostap)
	#(cd $(LINUX_DIR); \
	#cat $(HOSTAP_DRIVER_KERNEL_PATCH) | patch -p1 ; \
	#cp $(HOSTAP_DRIVER_DIR)/driver/modules/hostap*.[ch] \
	#drivers/net/wireless/. );
endif
	cp $(PATCH_DIR)/kernel-2.6/sq*.h $(LINUX_DIR)/include/linux/.
	touch $(LINUX_DIR)/.patched

$(CONFIG_DIR)/$(LINUX_KCONFIG_26):
	@if [ ! -f "$(CONFIG_DIR)/$(LINUX_KCONFIG_26)" ] ; then \
		echo ""; \
		echo "You should create a .config for your kernel"; \
		echo "and install it as $(LINUX_KCONFIG_26)"; \
		echo ""; \
		sleep 5; \
	fi;


$(LINUX_DIR)/.configured:  $(LINUX_DIR)/.patched  $(CONFIG_DIR)/$(LINUX_KCONFIG_26)
	-cp $(CONFIG_DIR)/$(LINUX_KCONFIG_26) $(LINUX_DIR)/.config
ifeq ($(strip $(EMULATE_FPU)),true)
	$(SED) "s/^.*CONFIG_MATH_EMULATION.*/CONFIG_MATH_EMULATION=y/;" \
		$(LINUX_DIR)/.config
else
	$(SED) "s/^.*CONFIG_MATH_EMULATION.*/CONFIG_MATH_EMULATION=n/;" \
		$(LINUX_DIR)/.config
endif
	$(SED) 's/^EXTRAVERSION\s=\s(.*)/EXTRAVERSION = $$1-floppyfw-$(FLOPPYFW_VERSION)\n/;' \
		$(LINUX_DIR)/Makefile
	$(MAKE) EXTRA_CFLAGS="$(LINUX_EXTRA_CFLAGS)" ARCH=$(ARCH) HOSTLDFLAGS="-lintl" -C $(LINUX_DIR) oldconfig include/linux/version.h
	touch $(LINUX_DIR)/.configured

linux-source-configured: $(LINUX_DIR)/.configured

$(LINUX_DIR)/$(LINUX_BINLOC): $(LINUX_DIR)/.configured
	$(MAKE) EXTRA_CFLAGS="$(LINUX_EXTRA_CFLAGS)" V=1 ARCH=$(ARCH) HOSTLDFLAGS="-lintl" CC="$(TARGET_CC)" -C $(LINUX_DIR) $(LINUX_FORMAT)
	$(MAKE) EXTRA_CFLAGS="$(LINUX_EXTRA_CFLAGS)" ARCH=$(ARCH) HOSTLDFLAGS="-lintl" CC="$(TARGET_CC)" -C $(LINUX_DIR) modules

$(MODULES_DIR)/lib/modules/$(LINUX_VERSION)/modules.dep: $(LINUX_DIR)/.configured
	$(RM) -r $(MODULES_DIR)/lib/modules
	$(MAKE) EXTRA_CFLAGS="$(LINUX_EXTRA_CFLAGS)" ARCH=$(ARCH) -C $(LINUX_DIR) INSTALL_MOD_PATH=$(MODULES_DIR) modules_install
	(cd $(MODULES_DIR) ; cat $(MODULES_DIR)/lib/modules/$(LINUX_VERSION)/modules.dep | $(SCRIPTS_DIR)/capsfix.pl > $(TMP_DIR)/moddep)
	#mv $(MODULES_DIR)/lib/modules/$(LINUX_VERSION)/modules.dep \
	#	$(MODULES_DIR)/lib/modules/$(LINUX_VERSION)/modules.dep.precaps
	mv $(TMP_DIR)/moddep $(MODULES_DIR)/lib/modules/$(LINUX_VERSION)/modules.dep
	(cd $(MODULES_DIR)/lib/modules; ln -s $(LINUX_VERSION)/kernel/drivers .)
	# $(DEPMOD)

$(LINUX_KERNEL): $(LINUX_DIR)/$(LINUX_BINLOC)
	cp -pf $(LINUX_DIR)/$(LINUX_BINLOC) $(LINUX_KERNEL)
	touch -c $(LINUX_KERNEL)

linux:  patch-o-matic hostap-driver-source $(IPTABLES_BUILD_DIR)/.configured $(LINUX_KERNEL) $(MODULES_DIR)/lib/modules/$(LINUX_VERSION)/modules.dep

linux-source: $(DL_DIR)/$(LINUX_SOURCE)

# This has been renamed so we do _NOT_ by default run this on 'make clean'
linuxclean: clean
	$(RM) $(LINUX_KERNEL)
	-$(MAKE) -C $(LINUX_DIR) clean

linux-dirclean:
	$(RM) -r $(LINUX_DIR)

# End encapsulation
endif