pcp_prepare_kernel_src

#!/bin/sh

. /etc/init.d/tc-functions
checknotroot

usage() {
	echo ""
	echo "Usage: $(basename $0) -k <kernel release> -s <path to kernel source>"
	echo "  -k  Build for kernel xxx. Will default to running kernel version if not set."
	echo "      current kernel name is $(uname -r)"
	echo "  -s  This is the location of the kernel source. Will clone pCP kernel repo if needed"
	echo ""
	exit 2
}

trimval() {
	echo $1 | cut -d '=' -f2 | xargs
}

while getopts k:s: OPTION; do
	case ${OPTION} in
		k) K_VER=${OPTARG} ;;
		s) DIR=$(readlink -f ${OPTARG})
			if [ "$DIR" = "" ]; then
				LINUX_SRC_DIR=${OPTARG}
			else
				LINUX_SRC_DIR=$(readlink -f ${OPTARG})
			fi
		;;
		*) usage ;;
	esac
done
[ "$LINUX_SRC_DIR" = "" ] && usage
KERNELVER=${K_VER:-$(uname -r)}

if [ ! -d $LINUX_SRC_DIR ]; then
	mkdir -p $LINUX_SRC_DIR
	if [ $? -ne 0 ]; then
		echo "Error creating src dir"
		exit 1
	fi
	DIR=$(readlink -f $LINUX_SRC_DIR)
	LINUX_SRC_DIR=${DIR}
fi

if [ ! -w $LINUX_SRC_DIR ]; then
	echo "Kernel source dir is not writtable.  Check permissions"
	exit 1
fi


echo "[ INFO ] Preparing kernel for version: $KERNELVER"
echo "[ INFO ] piCore Repo Version: $PICOREVER"
echo "[ INFO ] Saving Kernel sources to: $LINUX_SRC_DIR"

echo "[ INFO ] Loading Build dependancies"
STD_DEPS=""
BUILD_DEPS="compiletc squashfs-tools perl5 openssl-dev git bash"
TCZ_DEPS=""
DEV_TCZ_DEPS=""
FULL_DEPS="$STD_DEPS $BUILD_DEPS"

for deps in $FULL_DEPS; do
	tce-status -i | grep -q ${deps%.*}
	if [ $? -ne 0 ]; then
		if [ ! -f /etc/sysconfig/tcedir/optional/$deps.tcz ]; then
			echo "Downloading $deps"
			tce-load -w $deps
		fi
		tce-load -i $deps >/dev/null 2>&1
		if [ $? -eq 0 ]; then
			echo "[ INFO ] Loaded $deps..."
		else
			echo "[ ERROR ] Failed to load $deps... exiting"
			exit 1
		fi
	fi
done

### Get linux source
if [ -f $LINUX_SRC_DIR/Makefile ]; then
	#Check to see if the source is the right version
	while read LINE; do
		case $LINE in
			VERSION*) VERSION=$(trimval "${LINE}");;
			PATCHLEVEL*) PATCHLEVEL=$(trimval "${LINE}");;
			SUBLEVEL*) SUBLEVEL=$(trimval "${LINE}");;
			NAME*) break;;
			*);;
		esac
	done < $LINUX_SRC_DIR/Makefile

	CURRENTKERNELSRC="$VERSION.$PATCHLEVEL.$SUBLEVEL"
	if [ $(echo $KERNELVER | cut -d'-' -f1) = "$CURRENTKERNELSRC" ]; then
		echo "[ INFO ] Kernel source directory is the correct version"
		KSRC="OK"
	else
		echo "[ ERROR] Source directory is not the correct version, please select a new directory"
		exit 1
	fi
fi

if [ "$KSRC" != "OK" ]; then 
	KSRC="rpi-$(echo $KERNELVER | cut -d'-' -f1)-pcpPatched.zip"
	echo "[ INFO ] Downloading linux source from pCP github($KSRC)."
	wget -c https://github.com/piCorePlayer/linux/archive/refs/heads/$KSRC -P /tmp
	if [ $? -ne 0 ]; then
		echo "[ ERROR ] Error getting kernel source"
		exit 1
	fi
	echo "[ INFO ] Extracting kernel source to $LINUX_SRC_DIR"
	unzip -q -d "$LINUX_SRC_DIR" "/tmp/$KSRC"

	cd $LINUX_SRC_DIR/linux*
	if [ -f Makefile ]; then
		ls -A1 | xargs -r -I {} mv {} ..
		cd ..
		rmdir linux-*
		rm /tmp/$KSRC
	else
		echo "Linux source not found"
		exit 1
	fi
fi

KBASE=$(echo $KERNELVER | awk -F'.' '{ print $1 "." $2 }')
KREVISION=$(echo $KERNELVER | awk -F'-' '{ print $1 }')
SYM_REPO="https://github.com/piCorePlayer/pCP-Kernels/raw/master/${KBASE}/${KREVISION}"

### Get Symbols.
echo "[ INFO ] Downloading symbols from ${SYM_REPO}/${KERNELVER}"
if [ ! -f /tmp/config.xz ]; then
	busybox wget ${SYM_REPO}/${KERNELVER}_.config.xz -O /tmp/config.xz
	[ $? -ne 0 ] && (echo "[ERROR] config archive not found."; exit 1)
fi
if [ ! -f /tmp/Module.symvers.xz ]; then
	busybox wget ${SYM_REPO}/${KERNELVER}_Module.symvers.xz -O /tmp/Module.symvers.xz
	[ $? -ne 0 ] && (echo "[ERROR] symvers archive not found."; exit 1)
fi
if [ ! -f /tmp/System.map.xz ]; then
	busybox wget ${SYM_REPO}/${KERNELVER}_System.map.xz -O /tmp/System.map.xz
	[ $? -ne 0 ] && (echo "[ERROR] System.map archive not found."; exit 1)
fi

cd $LINUX_SRC_DIR
echo "[ INFO ] Cleaning linux source tree"
make -s mrproper

echo "[ INFO ] Copying configs and symbols"
xz -d -kc /tmp/config.xz > .config
xz -d -kc /tmp/System.map.xz > System.map
xz -d -kc /tmp/Module.symvers.xz > Module.symvers

sudo rm /lib/modules/${KERNELVER}/build
[ ! -d /lib/modules/${KERNELVER} ] && sudo mkdir -p /lib/modules/${KERNELVER}
sudo ln -sv $LINUX_SRC_DIR /lib/modules/${KERNELVER}/build

echo "[ INFO ] Preparing Kernel"
make -s -j4 KERNELRELEASE=$KERNELVER scripts
make -s -j4 KERNELRELEASE=$KERNELVER modules_prepare

touch /tmp/mark
MARK=$(ls -l /tmp/mark |awk -F' ' '{print $6 " " $7 " " $8}')

export KVER=$KERNELVER

echo "[ INFO ] Setting mark timestamp to $MARK. This allows finding installed files after build"
echo "           If you perform multiple driver installations, please run \"touch /tmp/mark\" beore"
echo "           running \"make\" for your driver."
echo ""
echo "[ INFO ] Now download source for your driver, cd to the root directory of the driver"
echo "           read the the pCP-KERNEL readme.md, edit the Makefile, and then build the"
echo "           driver by running \"make\" KVER=$KERNELVER -j<number of jobs>"
echo ""
echo "[ INFO ] If the driver is successfully built, then from the driver source directory, run"
echo "           pcp_make_module_extension -k $KERNELVER -e <name of extension>"
echo ""
echo "           i.e. pcp_make_module_extension -k $KERNELVER -e rtl8812au"
echo ""