#!/bin/sh

error()
{
	echo "error:" $* :\( >/dev/stderr
	exit 1;
}

safe_cd ()
{
	cd $* ||error "Can't cd to $*"
}

should_recompile_usb=0
should_recompile_kernel=0


## Intro
#
echo "		ATUWI driver compiler script"
echo ""
echo "Written by Daan Vreeken - Danovitsch @ Vitsch . net"
echo ""


## Determine our base (kernel sources) directory
#
if [ "$1" = "" ]; then
	# If nothing is specified, check the current directory
	BASE=`pwd`
	if [ ! -d "${BASE}/net" ]; then
		# If that fails, try the default ( /usr/src/sys )
		BASE=/usr/src/sys
	fi
else
	BASE=$1
fi

if [ ! -d "${BASE}/net" ]; then
	echo "You need to have the kernel sources installed to compile the"
	echo "atuwi driver."
	echo ""
	echo "If your kernel sources aren't in /usr/src/sys then please"
	echo "specify the location of your sources when starting atuwi-compile."
	echo "example:"
	echo " atuwi-compile /home/some/where/src/sys"
	echo ""
	error "Can't find the kernel sources in ${BASE}"
fi
if [ ! -d "${BASE}/modules/atuwi" ]; then
	echo "Can't find the atuwi driver files in ${BASE}"
	echo "Please make sure you have un-tar'd the atuwi driver into"
	echo "your kernel directory before you try to compile"
fi

safe_cd ${BASE}
BASE=`pwd`

echo "Kernel sources base directory: ${BASE}"
echo ""


## Check for the existence if_atuwi.c
#
if [ ! -f "${BASE}/dev/usb/if_atuwi.c" ]; then
	echo "Make sure you have un-tarred the atuwi sources into your"
	echo "kernel source directory before you start atuwi-compile"
	echo ""
	error "if_atuwi.c not found in ${BASE}/dev/usb/"
fi


## Download the latest usbdevs from the FreeBSD cvsweb interface
#
echo "Going to download the latest version of 'usbdevs' from www.FreeBSD.org"
safe_cd ${BASE}/dev/usb

if [ -f "usbdevs" -a ! -f "usbdevs.bck" ]; then
	cp usbdevs usbdevs.bck ||
	    error "Could not backup usbdevs to usbdevs.bck"
fi

URL="http://www.freebsd.org/cgi/cvsweb.cgi/~checkout~/src/sys/dev/usb/usbdevs"
fetch -o usbdevs ${URL} ||{
	echo ""
	echo "Couldn't fetch usbdevs! (Is the network configured?)"
	echo ""
	echo "Do you want to continue anyway? (Make sure you have updated usbdevs"
	echo "yourself if you choose to continue)"

	echo -n "Choose [y/n]: "
	answer=`head -n 1`

	if [ "${answer}" != "y" -a "${answer}" != "Y" ]; then
		echo "Didn't get 'y' as answer, stopping compiler script"
		exit 1
	fi

	echo "Continuing without downloading usbdevs."
}

echo "  done."


## Make the system aware of the new usbdevs file
#
if [ -f "Makefile.usbdevs" ]; then
	# Old kernel, we need to 'make -f Makefile.usbdevs'
	echo "Generating usbdevs list"
	make -f Makefile.usbdevs >/dev/null ||
	    error "Failed to 'make -f Makefile.usbdevs' list!"

	echo "  done."
else
	# Newer kernel, usbdevs list is generated when compiling usb
	should_recompile_usb=1
fi


## Apply the usb reset patch (if needed)
#
# We only apply the patch if the text "USBD_NEED_RESET" isn't found in usbdi.h
#
need_usb_patch=0
grep USBD_NEED_RESET ${BASE}/dev/usb/usbdi.h >/dev/null ||need_usb_patch=1

if [ "${need_usb_patch}" = "1" ]; then

	echo "Applying the usb-reset patch"
	safe_cd ${BASE}/dev
	patch <usb-reset-2004-01-08.diff ||
	    error "Could not apply usb reset patch!"

	echo "  done."
	should_recompile_usb=1
	should_recompile_kernel=1
else
	echo "Skipping usb reset patch since it's already installed"
fi


## Recompile usb subsystem if needed
#
if [ "${should_recompile_usb}" = "1" ]; then
	echo "Recompiling the usb subsystem"
	safe_cd ${BASE}/modules/usb
	make >/dev/null ||
	    error "Failed to compile usb subsystem"

	echo "  done."
fi


## Add if_atuwi.c to the 'files' file. (so 'device atuwi' can be used in the
# kernel config)
#
need_files_patch=0
grep if_atuwi.c ${BASE}/conf/files >/dev/null ||need_files_patch=1

if [ "${need_files_patch}" = "1" ]; then
	echo "Patching conf/files"
	safe_cd ${BASE}/conf
	patch files files-atuwi-2004-01-11.diff ||
	    error "Couldn't apply 'files' patch!"

	echo "  done."
else
	echo "Skipping 'files' patch since it's already installed"
fi


## Try to compile the driver itself
#
echo ""
echo "Compiling the driver"
safe_cd ${BASE}/modules/atuwi
touch ${BASE}/dev/usb/if_atuwi.c
make >/dev/null ||
    error "Failed to compile the driver"

echo ""
echo "=====> atuwi compiler is done :)"
echo ""
echo "You should now be able to load the atuwi driver module by typing :"
echo "kldload ${BASE}/modules/atuwi/if_atuwi.ko"

if [ "${should_recompile_kernel}" = "1" ]; then
	echo ""
	echo "Don't forget to recompile your kernel now and reboot for the"
	echo "usb reset patch to take effect!"
	echo ""
	echo "Otherwise the driver will work, but you'll have to reset"
	echo "the USB adapter yourself after the firmware is loaded to it."
	echo "For details about how this is done, please read the atuwi"
	echo "README in ${BASE}/modules/atuwi/atuwi-README.txt"
else
	echo ""
	echo "If you are using 'device atuwi' in your kernel config,"
	echo "you should recompile your kernel now"
fi