###########################################################################
#
# Copyright (c) 1999 - 2001, Intel Corporation 
#
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without 
# modification, are permitted provided that the following conditions are met:
#
#  1. Redistributions of source code must retain the above copyright notice, 
#     this list of conditions and the following disclaimer.
#
#  2. Redistributions in binary form must reproduce the above copyright notice,
#     this list of conditions and the following disclaimer in the documentation 
#     and/or other materials provided with the distribution.
#
#  3. Neither the name of Intel Corporation nor the names of its contributors 
#     may be used to endorse or promote products derived from this software 
#     without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS IS''
# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
# DISCLAIMED. IN NO EVENT SHALL CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
# PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 
# LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 
# NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
# EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 
#
###########################################################################

###########################################################################
# Configuration Section

# Optional features - set to 'y' for on, anything else for off
# Intel(R) Advanced Network Services
IANS := y

# debug
# CFLAGS += -g

###########################################################################
# Driver files

# core driver files
TARGET := e100.o
CFILES = e100_main.c eeprom.c e100_config.c e100_proc.c
HFILES = e100.h eeprom.h e100_config.h e100_proc.h rcvbundl.h 

# iANS
IANS_CFLAGS = -DIANS -DIANS_BASE_ADAPTER_TEAMING \
              -DIANS_BASE_VLAN_TAGGING -DIANS_BASE_VLAN_ID
IANS_CFILES = ans.c ans_hw.c ans_os.c ans_driver.c
IANS_HFILES = base_comm.h  ans.h ans_hw.h ans_os.h ans_driver.h

# Man
MAN_FILE = e100.7

# pick an appropriate MAN path
MAN_CFG := /etc/man.config
MAN_TYPE := man7
MSP := $(shell [ -e $(MAN_CFG) ] && grep -e "^MANPATH[^_]" $(MAN_CFG) | awk '{print $$2}')
ifeq (,$(MSP))
MSP :=	/usr/share/man \
	/usr/man
endif
# prune the list down to only values that exist
test_dir = $(shell [ -e $(dir)/$(MAN_TYPE) ] && echo $(dir))
MSP := $(foreach dir, $(MSP), $(test_dir))
# we will use the first valid entry in the search path
MAN_PATH := $(firstword $(MSP))
ifeq (,$(MAN_PATH))
  MAN_PATH := /usr/man
endif
MAN_INSTDIR=$(MAN_PATH)/$(MAN_TYPE)


###########################################################################
# Environment tests

# Kernel Search Path
# All the places we look for kernel source
KSP :=  /lib/modules/$(shell uname -r)/build \
        /usr/src/linux-$(shell uname -r) \
        /usr/src/linux-$(shell uname -r | sed 's/-.*//') \
        /usr/src/kernel-headers-$(shell uname -r) \
        /usr/src/kernel-source-$(shell uname -r) \
        /usr/src/linux-$(shell uname -r | sed 's/\([0-9]*\.[0-9]*\)\..*/\1/') \
        /usr/src/linux

# prune the list down to only values that exist
# and have an include/linux sub-directory
test_dir = $(shell [ -e $(dir)/include/linux ] && echo $(dir))
KSP := $(foreach dir, $(KSP), $(test_dir))

# we will use this first valid entry in the search path
KSRC := $(firstword $(KSP))

ifeq (,$(KSRC))
  $(error Linux kernel source not found)
endif

# files we get information from in KSRC
VERSION_FILE := $(KSRC)/include/linux/version.h
CONFIG_FILE  := $(KSRC)/include/linux/config.h

ifeq (,$(wildcard $(VERSION_FILE)))
  $(error Linux kernel source not configured - missing version.h)
endif

ifeq (,$(wildcard $(CONFIG_FILE)))
  $(error Linux kernel source not configured - missing config.h)
endif

# pick a compiler
ifneq (,$(findstring egcs-2.91.66, $(shell cat /proc/version)))
  CC := kgcc gcc cc
else
  CC := gcc cc
endif
test_cc = $(shell which $(cc) > /dev/null 2>&1 && echo $(cc))
CC := $(foreach cc, $(CC), $(test_cc))
CC := $(firstword $(CC))

# get the kernel version - we use this to find the correct install path
KVER := $(shell $(CC) $(CFLAGS) -E -dM $(VERSION_FILE) | grep UTS_RELEASE | \
          awk '{ print $$3 }' | sed 's/\"//g')

ifneq ($(KVER),$(shell uname -r))
  $(warning ***)
  $(warning *** Warning: kernel source version ($(KVER)))
  $(warning *** does not match running kernel  ($(shell uname -r)))
  $(warning *** Continuing with build,)
  $(warning *** resulting driver may not be what you want)
  $(warning ***)
endif

# pick an appropriate install path
ifneq (,$(wildcard /lib/modules/$(KVER)/kernel))
  INSTDIR := /lib/modules/$(KVER)/kernel/drivers/net
else
  INSTDIR := /lib/modules/$(KVER)/net
endif

# standard flags for module builds
CFLAGS += -Wall -DLINUX -D__KERNEL__ -DMODULE -DEXPORT_SYMTAB -D__NO_VERSION__ -O2 -pipe
CFLAGS += -I$(KSRC)/include -I.
CFLAGS += $(shell [ -f $(KSRC)/include/linux/modversions.h ] && \
            echo "-DMODVERSIONS -include $(KSRC)/include/linux/modversions.h")

# look for SMP in config.h
SMP := $(shell $(CC) $(CFLAGS) -E -dM $(CONFIG_FILE) | \
         grep CONFIG_SMP | awk '{ print $$3 }')
ifneq ($(SMP),1)
  SMP := 0
endif

ifneq ($(SMP),$(shell uname -a | grep SMP > /dev/null 2>&1 && echo 1 || echo 0))
  $(warning ***)
ifeq ($(SMP),1)
  $(warning *** Warning: kernel source configuration (SMP))
  $(warning *** does not match running kernel (UP))
else
  $(warning *** Warning: kernel source configuration (UP))
  $(warning *** does not match running kernel (SMP))
endif
  $(warning *** Continuing with build,)
  $(warning *** resulting driver may not be what you want)
  $(warning ***)
endif

ifeq ($(SMP), 1)
  CFLAGS += -D__SMP__
endif

# we need to know what platform the driver is being built on
# some additional features are only built on iA32
ARCH := $(shell uname -m | sed 's/i.86/i386/')
ifneq ($(ARCH),i386)
ifneq ($(ARCH),ia64)
  IANS := n
endif
endif

# iANS
ifeq ($(IANS),y)
  CFLAGS += $(IANS_CFLAGS)
  CFILES += $(IANS_CFILES)
  HFILES += $(IANS_HFILES)
endif

ifeq ($(ARCH),ia64)
  CFLAGS += -DSTB_WA 
endif

###########################################################################
# Build rules

.SILENT: $(TARGET)
$(TARGET): $(filter-out $(TARGET), $(CFILES:.c=.o))
	$(LD) -r $^ -o $@
	echo; echo
	echo "**************************************************"
	echo "** $(TARGET) built for $(KVER)"
	echo -n "** SMP             "
	if [ "$(SMP)" = "1" ]; \
		then echo "Enabled"; else echo "Disabled"; fi
	echo -n "** iANS hooks      "
	if [ "$(IANS)" = "y" ]; \
		then echo "Enabled"; else echo "Disabled"; fi
	echo "**************************************************"
	echo

$(CFILES:.c=.o): $(HFILES)

$(MAN_FILE).gz: $(MAN_FILE)
	gzip -c $< > $@

install: $(TARGET) $(MAN_FILE).gz
	mkdir -p $(INSTALL_MOD_PATH)$(INSTDIR)
	install -m 644 -o root $(TARGET) $(INSTALL_MOD_PATH)$(INSTDIR)
	mkdir -p $(INSTALL_MOD_PATH)$(MAN_INSTDIR)
	install -m 644 -o root $(MAN_FILE).gz $(INSTALL_MOD_PATH)$(MAN_INSTDIR)
ifeq (,$(INSTALL_MOD_PATH))
	/sbin/depmod -a || true
else
	/sbin/depmod -b $(INSTALL_MOD_PATH) -a || true
endif

uninstall:
	if [ -e $(INSTDIR)/$(TARGET) ] ; then \
	    rm -f $(INSTDIR)/$(TARGET) ; \
	fi
	if [ -e $(MAN_INSTDIR)/$(MAN_FILE).gz ] ; then \
	    rm -f $(MAN_INSTDIR)/$(MAN_FILE).gz ; \
	fi	
	/sbin/depmod -a

clean:
	rm -f $(TARGET) $(CFILES:.c=.o) $(MAN_FILE).gz *~
