#!/bin/bash

# SPDX-FileCopyrightText: Copyright (c) 2023 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
# SPDX-License-Identifier: BSD-3-Clause
#
# 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 the copyright holder 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 THE COPYRIGHT HOLDER OR 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.

set -e

OPTEE_DEVNODE="/dev/teepriv0"
PREDIR="/sys/class/mmc_host"
CIDPATH=""
CID=""


if [ ! -c "${OPTEE_DEVNODE}" ]; then
	modprobe tee
	modprobe optee
fi

if [ ! -c "${OPTEE_DEVNODE}" ]; then
	echo "${OPTEE_DEVNODE} doesn't exist"
	exit 1
fi


for file in "${PREDIR}"/*
do
	if [ -d "${file}" ]; then
		name=${file##*/}
		tmppath="${file}/${name}:0001/cid"
		if [ -e "${tmppath}" ]; then
			CIDPATH=${tmppath}
			break;
		fi
	fi
done


if [ "${CIDPATH}" = "" ]; then
	echo "tee-supplicant startup without specified CID."
	/usr/sbin/tee-supplicant
else
	CID=$(cat "${CIDPATH}")
	echo "tee-supplicant startup with CID(${CID})."
	/usr/sbin/tee-supplicant -r "${CID}"
fi