#! /bin/sh

# Copyright (C) 2022 Xilinx, Inc. All rights reserved.
# Copyright (C) 2023 Advanced Micro Devices, Inc. All rights reserved.
#
# SPDX-License-Identifier: MIT

# read values from dfx-mgr conf file
conffile="/etc/dfx-mgrd/daemon.conf"
if [ ! -f "${conffile}" ]; then
        echo "dfx-mgrd configuration file not found: ${conffile}"
        exit 1
fi

fwbasedir=$(grep "firmware_location" ${conffile} | sed 's/.*:.*\[\"\(.*\)\"\],\?/\1/')
if [ -z "${fwbasedir}" ]; then
        echo "Property 'firmware_location' not found in ${conffile}"
        exit 1
fi

fwfile=$(grep "default_accel" ${conffile} | sed 's/.*:.*\"\(.*\)\",\?/\1/')
if [ -z "${fwfile}" ]; then
        echo "Property 'default_accel' not found in ${conffile}"
        exit 1
fi

# check if default firmware is already set and present
if [ -f "${fwfile}" ]; then
    fwname=$(cat ${fwfile})
    fwdir="${fwbasedir}/${fwname}"
    if [ -n "${fwname}" ] && [ -d "${fwdir}" ]; then
        echo "Default firmware detected: ${fwname}"
        exit 0
    fi
fi

# search for firmware based on EEPROM board id
echo "Trying to detect default firmware based on EEPROM..."

#check if board is a zcu106 eval board product
eeprom=$(ls /sys/bus/i2c/devices/*54/eeprom 2> /dev/null)
if [ -n "${eeprom}" ]; then
    boardid=`dd if=$eeprom bs=1 count=6 skip=208 2>/dev/null | tr '[:upper:]' '[:lower:]'`
    revision=`dd if=$eeprom bs=1 count=3 skip=224 2>/dev/null | tr '[:upper:]' '[:lower:]'`

    fwname="${boardid}-${revision}"
    fwdir="${fwbasedir}/${fwname}"

    fixed_rev=2.0
    var=$(awk 'BEGIN{ print "'$fixed_rev'"<"'$revision'" }')

    if [ "${boardid}" == "zcu106" ] && [ "${var}" -eq 1 ] ;then
         revision=2.0
         echo "later than 2.0 board revisions are supported in 2.0 bit and dtbo files"
         fwname="${boardid}-${revision}"
         fwdir="${fwbasedir}/${fwname}"
         echo "${fwname}" > "${fwfile}"
         exit 1
    elif [ ! -d "${fwdir}" ] ; then
         echo "No default firmware named ${fwname} found in ${fwbasedir} , Loading rev1.0 bitstream and dtbo as default "
         revision=1.0
         fwname=$(ls ${fwbasedir} | grep ${revision})
         fwdir="${fwbasedir}/${fwname}"
         echo "${fwname}" > "${fwfile}"
         exit 1
    fi

    echo "Default firmware detected: ${fwname}"
    echo "${fwname}" > "${fwfile}"
    exit 0
fi