#!/bin/bash

# Purpose: Install Realtek USB WiFi adapter drivers.
#
# This version of the installation script does not use dkms.

SCRIPT_NAME="install-driver-no-dkms.sh"
SCRIPT_VERSION="20220913"
OPTIONS_FILE="88x2bu.conf"

MODULE_NAME="88x2bu"
KVER="$(uname -r)"
KSRC="/lib/modules/${KVER}/build"
MODDESTDIR="/lib/modules/${KVER}/kernel/drivers/net/wireless/"

# Some distros have a non-mainlined, patched-in kernel driver
# that has to be deactivated.
BLACKLIST_FILE="rtw88_8822bu.conf"

# support for NoPrompt allows non-interactive use of this script
NO_PROMPT=0

# get the options
while [ $# -gt 0 ]
do
	case $1 in
		NoPrompt)
			NO_PROMPT=1 ;;
		*h|*help|*)
			echo "Syntax $0 <NoPrompt>"
			echo "       NoPrompt - noninteractive mode"
			echo "       -h|--help - Show help"
			exit 1
			;;
	esac
	shift
done

# check to ensure sudo was used
if [[ $EUID -ne 0 ]]
then
	echo "You must run this script with superuser (root) privileges."
	echo "Try: \"sudo ./${SCRIPT_NAME}\""
	exit 1
fi

# displays script name and version
echo "Running ${SCRIPT_NAME} version ${SCRIPT_VERSION}"

# information that helps with bug reports
# kernel
uname -r
# architecture - for ARM: aarch64 = 64 bit, armv7l = 32 bit
uname -m
#getconf LONG_BIT (need to work on this)

echo "Installing the following driver..."
echo "${MODDESTDIR}${MODULE_NAME}.ko"

# sets module parameters (driver options)
echo "Copying ${OPTIONS_FILE} to: /etc/modprobe.d"
cp -f ${OPTIONS_FILE} /etc/modprobe.d

# blacklist the in-kernel module (driver) so that there is no conflict
echo "Copying ${BLACKLIST_FILE} to: /etc/modprobe.d"
cp -f ${BLACKLIST_FILE} /etc/modprobe.d

make clean

make
RESULT=$?

if [[ "$RESULT" != "0" ]]
then
	echo "An error occurred. Error = ${RESULT}"
	echo "Please report this error."
	echo "Please copy all screen output and paste it into the report."
	echo "You will need to run the following before reattempting installation."
	echo "$ sudo ./remove-driver-no-dkms.sh"
	exit $RESULT
fi

# As shown in Makefile
# install:
#	install -p -m 644 $(MODULE_NAME).ko  $(MODDESTDIR)
#	/sbin/depmod -a ${KVER}

make install
RESULT=$?

if [[ ("$RESULT" = "0")]]
then
	echo "The driver was installed successfully."
	# unblock wifi
	rfkill unblock wlan
else
	echo "An error occurred. Error = ${RESULT}"
	echo "Please report this error."
	echo "Please copy all screen output and paste it into the report."
	echo "You will need to run the following before reattempting installation."
	echo "$ sudo ./remove-driver-no-dkms.sh"
	exit $RESULT
fi

# if NoPrompt is not used, ask user some questions to complete installation
if [ $NO_PROMPT -ne 1 ]
then
	read -p "Do you want to edit the driver options file now? [y/N] " -n 1 -r
	echo
	if [[ $REPLY =~ ^[Yy]$ ]]
	then
		nano /etc/modprobe.d/${OPTIONS_FILE}
	fi

	read -p "Do you want to reboot now? (recommended) [y/N] " -n 1 -r
	echo
	if [[ $REPLY =~ ^[Yy]$ ]]
	then
		reboot
	fi
fi

exit 0