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firmware.sh
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firmware.sh
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#!/bin/bash
#
# shellcheck disable=SC2154,SC2086,SC2059
###################
# flash RW_LEGACY #
###################
function flash_rwlegacy()
{
#set working dir
cd /tmp || { exit_red "Error al cambiar al directorio temporal; no se puede continuar"; return 1; }
# set dev mode legacy boot / AltFw flags
if [ "${isChromeOS}" = true ]; then
crossystem dev_boot_legacy=1 > /dev/null 2>&1
crossystem dev_boot_altfw=1 > /dev/null 2>&1
fi
#determine proper file
if [ "$device" = "link" ]; then
rwlegacy_file=$seabios_link
elif [[ "$isHswBox" = true || "$isBdwBox" = true ]]; then
rwlegacy_file=$seabios_hswbdw_box
elif [[ "$isHswBook" = true || "$isBdwBook" = true ]]; then
rwlegacy_file=$seabios_hswbdw_book
elif [ "$isByt" = true ]; then
rwlegacy_file=$seabios_baytrail
elif [ "$isBsw" = true ]; then
rwlegacy_file=$seabios_braswell
elif [ "$isSkl" = true ]; then
rwlegacy_file=$seabios_skylake
elif [ "$isApl" = true ]; then
rwlegacy_file=$seabios_apl
elif [ "$kbl_use_rwl18" = true ]; then
rwlegacy_file=$seabios_kbl_18
elif [ "$isKbl" = true ]; then
rwlegacy_file=$seabios_kbl
elif [ "$isWhl" = true ]; then
rwlegacy_file=$rwl_altfw_whl
elif [ "$device" = "drallion" ]; then
rwlegacy_file=$rwl_altfw_drallion
elif [ "$isCmlBox" = true ]; then
rwlegacy_file=$rwl_altfw_cml
elif [ "$isJsl" = true ]; then
rwlegacy_file=$rwl_altfw_jsl
elif [ "$isTgl" = true ]; then
rwlegacy_file=$rwl_altfw_tgl
elif [ "$isGlk" = true ]; then
rwlegacy_file=$rwl_altfw_glk
elif [ "$isAdl" = true ]; then
rwlegacy_file=$rwl_altfw_adl
elif [ "$isAdlN" = true ]; then
rwlegacy_file=$rwl_altfw_adl_n
elif [ "$isStr" = true ]; then
rwlegacy_file=$rwl_altfw_stoney
elif [ "$isPco" = true ]; then
rwlegacy_file=$rwl_altfw_pco
elif [ "$isCzn" = true ]; then
rwlegacy_file=$rwl_altfw_czn
elif [ "$isMdn" = true ]; then
rwlegacy_file=$rwl_altfw_mdn
else
echo_red "Unknown or unsupported device (${device}); cannot update RW_LEGACY firmware."
echo_red "If your device is listed as supported on https://mrchromebox.tech/#devices,\n
then email [email protected] and include a screenshot of the main menu."
read -rep "Press enter to return to the main menu"
return 1
fi
if [[ "$rwlegacy_file" = *"altfw"* ]]; then
echo_green "\nInstall/Update RW_LEGACY Firmware (AltFw / edk2)"
else
echo_green "\nInstall/Update RW_LEGACY Firmware (Legacy BIOS / SeaBIOS)"
fi
echo_yellow "
NOTE: RW_LEGACY firmware cannot be used to run Windows. Period.
If you are looking to run Windows, see the documentation on coolstar.org.
MrChromebox does not provide any support for running Windows."
REPLY=""
read -rep "Press Y to continue or any other key to return to the main menu. "
[[ "$REPLY" = "y" || "$REPLY" = "Y" ]] || return
preferUSB=false
if [[ "$rwlegacy_file" != *"altfw"* ]]; then
echo -e ""
#USB boot priority
echo_yellow "Default to booting from USB?"
read -rep "If N, always boot from internal storage unless selected from boot menu. [y/N] "
[[ "$REPLY" = "y" || "$REPLY" = "Y" ]] && preferUSB=true
echo -e ""
fi
#download RW_LEGACY update
echo_yellow "\nDownloading RW_LEGACY firmware update\n(${rwlegacy_file})"
$CURL -sLO "${rwlegacy_source}${rwlegacy_file}.md5"
$CURL -sLO "${rwlegacy_source}${rwlegacy_file}"
#verify checksum on downloaded file
if ! md5sum -c "${rwlegacy_file}.md5" > /dev/null 2>&1; then
exit_red "RW_LEGACY download checksum fail; download corrupted, cannot flash"
return 1
fi
#preferUSB?
if [ "$preferUSB" = true ]; then
if ! $CURL -sLo bootorder "${cbfs_source}bootorder.usb"; then
echo_red "Unable to download bootorder file; boot order cannot be changed."
else
${cbfstoolcmd} "${rwlegacy_file}" remove -n bootorder > /dev/null 2>&1
${cbfstoolcmd} "${rwlegacy_file}" add -n bootorder -f /tmp/bootorder -t raw > /dev/null 2>&1
fi
fi
#flash updated RW_LEGACY firmware
echo_yellow "Installing RW_LEGACY firmware"
if ! ${flashromcmd} -w -i RW_LEGACY:${rwlegacy_file} -o /tmp/flashrom.log > /dev/null 2>&1; then
cat /tmp/flashrom.log
echo_red "An error occurred flashing the RW_LEGACY firmware."
else
echo_green "RW_LEGACY firmware successfully installed/updated."
# update firmware type
firmwareType="Stock ChromeOS w/RW_LEGACY"
#Prevent from trying to boot stock ChromeOS install
[[ "$boot_mounted" = true ]] && rm -rf /tmp/boot/syslinux > /dev/null 2>&1
fi
read -rep "Press [Enter] to return to the main menu."
}
#############################
# Install Full ROM Firmware #
#############################
function flash_full_rom()
{
echo_green "\nInstall/Update UEFI Full ROM Firmware"
echo_yellow "IMPORTANT: flashing the firmware has the potential to brick your device,
requiring relatively inexpensive hardware and some technical knowledge to
recover.Not all boards can be tested prior to release, and even then slight
differences in hardware can lead to unforseen failures.
If you don't have the ability to recover from a bad flash, you're taking a risk.
You have been warned."
[[ "$isChromeOS" = true ]] && echo_yellow "Also, flashing Full ROM firmware will remove your ability to run ChromeOS."
read -rep "Do you wish to continue? [y/N] "
[[ "$REPLY" = "y" || "$REPLY" = "Y" ]] || return
#spacing
echo -e ""
# ensure hardware write protect disabled
[[ "$wpEnabled" = true ]] && { exit_red "\nHardware write-protect enabled, cannot flash Full ROM firmware."; return 1; }
#special warning for CR50 devices
if [[ "$isStock" = true && "$hasCR50" = true ]]; then
echo_yellow "NOTICE: flashing your Chromebook is serious business.
To ensure recovery in case something goes wrong when flashing,
be sure to set the ccd capability 'FlashAP Always' using your
USB-C debug cable, otherwise recovery will involve disassembling
your device (which is very difficult in some cases)."
echo_yellow "If you wish to continue, type: 'I ACCEPT' and press enter."
read -re
[[ "$REPLY" = "I ACCEPT" ]] || return
fi
#UEFI notice if flashing from ChromeOS or Legacy
if [[ ! -d /sys/firmware/efi ]]; then
[[ "$isChromeOS" = true ]] && currOS="ChromeOS" || currOS="Your Legacy-installed OS"
echo_yellow "
NOTE: After flashing UEFI firmware, you will need to install a UEFI-compatible
OS; ${currOS} will no longer be bootable. See https://mrchromebox.tech/#faq"
REPLY=""
read -rep "Press Y to continue or any other key to abort. "
[[ "$REPLY" = "y" || "$REPLY" = "Y" ]] || return
fi
# PCO boot device notice
if [[ "$isPCO" = true && ! -d /sys/firmware/efi ]]; then
echo_yellow "
NOTE: Booting from eMMC on AMD Picasso-based devices does not currently work --
only NVMe, SD and USB. If you have a device with eMMC storage you will not be
able to boot from it after installing the UEFI Full ROM firmware."
REPLY=""
read -rep "Press Y to continue or any other key to abort. "
[[ "$REPLY" = "y" || "$REPLY" = "Y" ]] || return
fi
#determine correct file / URL
firmware_source=${fullrom_source}
eval coreboot_file="$`echo "coreboot_uefi_${device}"`"
#rammus special case (upgrade from older UEFI firmware)
if [ "$device" = "rammus" ]; then
echo -e ""
echo_yellow "Unable to determine Chromebook model"
echo -e "Because of your current firmware, I'm unable to
determine the exact mode of your Chromebook. Are you using
an Asus C425 (LEONA) or Asus C433/C434 (SHYVANA)?
"
REPLY=""
while [[ "$REPLY" != "L" && "$REPLY" != "l" && "$REPLY" != "S" && "$REPLY" != "s" ]]
do
read -rep "Enter 'L' for LEONA, 'S' for SHYVANA: "
if [[ "$REPLY" = "S" || "$REPLY" = "s" ]]; then
coreboot_file=${coreboot_uefi_shyvana}
else
coreboot_file=${coreboot_uefi_leona}
fi
done
fi
#coral special case (variant not correctly identified)
if [ "$device" = "coral" ]; then
echo -e ""
echo_yellow "Unable to determine correct Chromebook model"
echo -e "Because of your current firmware, I'm unable to determine the exact mode of your Chromebook.
Please select the number for the correct option from the list below:"
coral_boards=(
"ASTRONAUT (Acer Chromebook 11 [C732])"
"BABYMEGA (Asus Chromebook C223NA)"
"BABYTIGER (Asus Chromebook C523NA)"
"BLACKTIP (CTL Chromebook NL7/NL7T)"
"BLUE (Acer Chromebook 15 [CB315])"
"BRUCE (Acer Chromebook Spin 15 [CP315])"
"EPAULETTE (Acer Chromebook 514)"
"LAVA (Acer Chromebook Spin 11 [CP311])"
"NASHER (Dell Chromebook 11 5190)"
"NASHER360 (Dell Chromebook 11 5190 2-in-1)"
"RABBID (Asus Chromebook C423)"
"ROBO (Lenovo 100e Chromebook)"
"ROBO360 (Lenovo 500e Chromebook)"
"SANTA (Acer Chromebook 11 [CB311-8H])"
"WHITETIP (CTL Chromebook J41/J41T)"
)
select board in "${coral_boards[@]}"; do
board=$(echo ${board,,} | cut -f1 -d ' ')
eval coreboot_file=$`echo "coreboot_uefi_${board}"`
break;
done
fi
# ensure we have a file to flash
if [[ "$coreboot_file" = "" ]]; then
exit_red "The script does not currently have a firmware file for your device (${device^^}); cannot continue."; return 1
fi
#extract device serial if present in cbfs
${cbfstoolcmd} /tmp/bios.bin extract -n serial_number -f /tmp/serial.txt >/dev/null 2>&1
#extract device HWID
if [[ "$isStock" = "true" ]]; then
${gbbutilitycmd} /tmp/bios.bin --get --hwid | sed 's/[^ ]* //' > /tmp/hwid.txt 2>/dev/null
else
${cbfstoolcmd} /tmp/bios.bin extract -n hwid -f /tmp/hwid.txt >/dev/null 2>&1
fi
# create backup if existing firmware is stock
if [[ "$isStock" = "true" ]]; then
if [[ "$isEOL" = "false" ]]; then
REPLY=y
else
echo_yellow "\nCreate a backup copy of your stock firmware?"
read -erp "This is highly recommended in case you wish to return your device to stock
configuration/run ChromeOS, or in the (unlikely) event that things go south
and you need to recover using an external EEPROM programmer. [Y/n] "
fi
[[ "$REPLY" = "n" || "$REPLY" = "N" ]] && true || backup_firmware
#check that backup succeeded
[ $? -ne 0 ] && return 1
fi
#download firmware file
cd /tmp || { exit_red "Error changing to tmp dir; cannot proceed"; return 1; }
echo_yellow "\nDownloading Full ROM firmware\n(${coreboot_file})"
if ! $CURL -sLO "${firmware_source}${coreboot_file}"; then
exit_red "Firmware download failed; cannot flash. curl error code $?"; return 1
fi
if ! $CURL -sLO "${firmware_source}${coreboot_file}.sha1"; then
exit_red "Firmware checksum download failed; cannot flash."; return 1
fi
#verify checksum on downloaded file
if ! sha1sum -c "${coreboot_file}.sha1" > /dev/null 2>&1; then
exit_red "Firmware image checksum verification failed; download corrupted, cannot flash."; return 1
fi
#persist serial number?
if [ -f /tmp/serial.txt ]; then
echo_yellow "Persisting device serial number"
${cbfstoolcmd} "${coreboot_file}" add -n serial_number -f /tmp/serial.txt -t raw > /dev/null 2>&1
fi
#persist device HWID?
if [ -f /tmp/hwid.txt ]; then
echo_yellow "Persisting device HWID"
${cbfstoolcmd} "${coreboot_file}" add -n hwid -f /tmp/hwid.txt -t raw > /dev/null 2>&1
fi
#Persist RW_MRC_CACHE UEFI Full ROM firmware
${cbfstoolcmd} /tmp/bios.bin read -r RW_MRC_CACHE -f /tmp/mrc.cache > /dev/null 2>&1
if [[ $isFullRom = "true" && $? -eq 0 ]]; then
${cbfstoolcmd} "${coreboot_file}" write -r RW_MRC_CACHE -f /tmp/mrc.cache > /dev/null 2>&1
fi
#Persist SMMSTORE if exists
if ${cbfstoolcmd} /tmp/bios.bin read -r SMMSTORE -f /tmp/smmstore > /dev/null 2>&1; then
${cbfstoolcmd} "${coreboot_file}" write -r SMMSTORE -f /tmp/smmstore > /dev/null 2>&1
fi
# persist VPD if possible
if extract_vpd /tmp/bios.bin; then
# try writing to RO_VPD FMAP region
if ! ${cbfstoolcmd} "${coreboot_file}" write -r RO_VPD -f /tmp/vpd.bin > /dev/null 2>&1; then
# fall back to vpd.bin in CBFS
${cbfstoolcmd} "${coreboot_file}" add -n vpd.bin -f /tmp/vpd.bin -t raw > /dev/null 2>&1
fi
fi
#disable software write-protect
echo_yellow "Disabling software write-protect and clearing the WP range"
if ! ${flashromcmd} --wp-disable > /dev/null 2>&1 && [[ "$swWp" = "enabled" ]]; then
exit_red "Error disabling software write-protect; unable to flash firmware."; return 1
fi
#clear SW WP range
if ! ${flashromcmd} --wp-range 0 0 > /dev/null 2>&1; then
# use new command format as of commit 99b9550
if ! ${flashromcmd} --wp-range 0,0 > /dev/null 2>&1 && [[ "$swWp" = "enabled" ]]; then
exit_red "Error clearing software write-protect range; unable to flash firmware."; return 1
fi
fi
#flash Full ROM firmware
# clear log file
rm -f /tmp/flashrom.log
echo_yellow "Installing Full ROM firmware (may take up to 90s)"
#check if flashrom supports --noverify-all
if ${flashromcmd} -h | grep -q "noverify-all" ; then
noverify="-N"
else
noverify="-n"
fi
#check if flashrom supports logging to file
if ${flashromcmd} -V -o /dev/null > /dev/null 2>&1; then
output_params=">/dev/null 2>&1 -o /tmp/flashrom.log"
${flashromcmd} ${flashrom_params} ${noverify} -w ${coreboot_file} >/dev/null 2>&1 -o /tmp/flashrom.log
else
output_params=">/tmp/flashrom.log 2>&1"
${flashromcmd} ${flashrom_params} ${noverify} -w ${coreboot_file} >/tmp/flashrom.log 2>&1
fi
if [ $? -ne 0 ]; then
echo_red "Error running cmd: ${flashromcmd} ${flashrom_params} ${noverify} -w ${coreboot_file} ${output_params}"
if [ -f /tmp/flashrom.log ]; then
read -rp "Press enter to view the flashrom log file, then space for next page, q to quit"
more /tmp/flashrom.log
fi
exit_red "An error occurred flashing the Full ROM firmware. DO NOT REBOOT!"; return 1
else
echo_green "Full ROM firmware successfully installed/updated."
#Prevent from trying to boot stock ChromeOS install
if [[ "$isStock" = true && "$isChromeOS" = true && "$boot_mounted" = true ]]; then
rm -rf /tmp/boot/efi > /dev/null 2>&1
rm -rf /tmp/boot/syslinux > /dev/null 2>&1
fi
#Warn about long RAM training time
echo_yellow "IMPORTANT:\nThe first boot after flashing may take substantially
longer than subsequent boots -- up to 30s or more.
Be patient and eventually your device will boot :)"
# Add note on touchpad firmware for EVE
if [[ "${device^^}" = "EVE" && "$isStock" = true ]]; then
echo_yellow "IMPORTANT:\n
If you're going to run Windows on your Pixelbook, you must downgrade
the touchpad firmware now (before rebooting) otherwise it will not work.
Select the D option from the main main in order to do so."
fi
#set vars to indicate new firmware type
isStock=false
isFullRom=true
# Add NVRAM reset note for 4.12 release
if [[ "$isUEFI" = true && "$useUEFI" = true ]]; then
echo_yellow "IMPORTANT:\n
This update uses a new format to store UEFI NVRAM data, and
will reset your BootOrder and boot entries. You may need to
manually Boot From File and reinstall your bootloader if
booting from the internal storage device fails."
fi
firmwareType="Full ROM / UEFI (pending reboot)"
isUEFI=true
fi
read -rep "Press [Enter] to return to the main menu."
}
#########################
# Downgrade Touchpad FW #
#########################
function downgrade_touchpad_fw()
{
# offer to downgrade touchpad firmware on EVE
if [[ "${device^^}" = "EVE" ]]; then
echo_green "\nDowngrade Touchpad Firmware"
echo_yellow "If you plan to run Windows on your Pixelbook, it is necessary to downgrade
the touchpad firmware, otherwise the touchpad will not work."
echo_yellow "You should do this after flashing the UEFI firmware, but before rebooting."
read -rep "Do you wish to downgrade the touchpad firmware now? [y/N] "
if [[ "$REPLY" = "y" || "$REPLY" = "Y" ]] ; then
# ensure firmware write protect disabled
[[ "$wpEnabled" = true ]] && { exit_red "\nHardware write-protect enabled, cannot downgrade touchpad firmware."; return 1; }
# download TP firmware
echo_yellow "\nDownloading touchpad firmware\n(${touchpad_eve_fw})"
$CURL -s -LO "${other_source}${touchpad_eve_fw}"
$CURL -s -LO "${other_source}${touchpad_eve_fw}.sha1"
#verify checksum on downloaded file
if sha1sum -c ${touchpad_eve_fw}.sha1 > /dev/null 2>&1; then
# flash TP firmware
echo_green "Flashing touchpad firmware -- do not touch the touchpad while updating!"
if ${flashromcmd/${flashrom_programmer}} -p ec:type=tp -i EC_RW -w ${touchpad_eve_fw} -o /tmp/flashrom.log >/dev/null 2>&1; then
echo_green "Touchpad firmware successfully downgraded."
echo_yellow "Please reboot your Pixelbook now."
else
# try with older eve flashrom
[[ "$isChromeOS" == "true" ]] && tpPath="/usr/local/bin" || tpPath="/tmp"
(
cd $tpPath
$CURL -sLO "${util_source}flashrom_eve_tp"
chmod +x flashrom_eve_tp
)
if $tpPath/flashrom_eve_tp -p ec:type=tp -i EC_RW -w ${touchpad_eve_fw} -o /tmp/flashrom.log >/dev/null 2>&1; then
echo_green "Touchpad firmware successfully downgraded."
echo_yellow "Please reboot your Pixelbook now."
else
echo_red "Error flashing touchpad firmware:"
cat /tmp/flashrom.log
echo_yellow "\nThis function sometimes doesn't work under Linux, in which case it is\nrecommended to try under ChromiumOS."
fi
fi
else
echo_red "Touchpad firmware download checksum fail; download corrupted, cannot flash."
fi
fi
read -rep "Press [Enter] to return to the main menu."
fi
}
#######################
# Upgrade Touchpad FW #
#######################
function upgrade_touchpad_fw()
{
# offer to upgrade touchpad firmware on EVE
if [[ "${device^^}" = "EVE" ]]; then
echo_green "\nUpgrade Touchpad Firmware"
echo_yellow "If you plan to restore ChromeOS on your Pixelbook, it is necessary to upgrade
the touchpad firmware, otherwise the touchpad will not work."
echo_yellow "You should do this after restoring the stock firmware, but before rebooting."
read -rep "Do you wish to upgrade the touchpad firmware now? [y/N] "
if [[ "$REPLY" = "y" || "$REPLY" = "Y" ]] ; then
# ensure firmware write protect disabled
[[ "$wpEnabled" = true ]] && { exit_red "\nHardware write-protect enabled, cannot upgrade touchpad firmware."; return 1; }
# download TP firmware
echo_yellow "\nDownloading touchpad firmware\n(${touchpad_eve_fw_stock})"
$CURL -s -LO "${other_source}${touchpad_eve_fw_stock}"
$CURL -s -LO "${other_source}${touchpad_eve_fw_stock}.sha1"
#verify checksum on downloaded file
if sha1sum -c ${touchpad_eve_fw_stock}.sha1 > /dev/null 2>&1; then
# flash TP firmware
echo_green "Flashing touchpad firmware -- do not touch the touchpad while updating!"
if ${flashromcmd/${flashrom_programmer}} -p ec:type=tp -i EC_RW -w ${touchpad_eve_fw_stock} -o /tmp/flashrom.log >/dev/null 2>&1; then
echo_green "Touchpad firmware successfully upgraded."
echo_yellow "Please reboot your Pixelbook now."
else
# try with older eve flashrom
[[ "$isChromeOS" == "true" ]] && tpPath="/usr/local/bin" || tpPath="/tmp"
(
cd $tpPath
$CURL -sLO "${util_source}flashrom_eve_tp"
chmod +x flashrom_eve_tp
)
if $tpPath/flashrom_eve_tp -p ec:type=tp -i EC_RW -w ${touchpad_eve_fw_stock} -o /tmp/flashrom.log >/dev/null 2>&1; then
echo_green "Touchpad firmware successfully upgraded."
echo_yellow "Please reboot your Pixelbook now."
else
echo_red "Error flashing touchpad firmware:"
cat /tmp/flashrom.log
echo_yellow "\nThis function sometimes doesn't work under Linux, in which case it is\nrecommended to try under ChromeOS."
fi
fi
else
echo_red "Touchpad firmware download checksum fail; download corrupted, cannot flash."
fi
fi
read -rep "Press [Enter] to return to the main menu."
fi
}
##########################
# Restore Stock Firmware #
##########################
function restore_stock_firmware()
{
echo_green "\nRestore Stock Firmware"
echo_yellow "Standard disclaimer: flashing the firmware has the potential to
brick your device, requiring relatively inexpensive hardware and some
technical knowledge to recover. You have been warned."
read -rep "Do you wish to continue? [y/N] "
[[ "$REPLY" = "Y" || "$REPLY" = "y" ]] || return
# check if EOL
if [ "$isEOL" = true ]; then
echo_yellow "\nVERY IMPORTANT:
Your device has reached end of life (EOL) and is no longer supported by Google.
Returning the to stock firmware **IS NOT RECOMMENDED**.
MrChromebox will not provide any support for EOL devices running anything
other than the latest UEFI Full ROM firmware release."
read -rep "Do you wish to continue? [y/N] "
[[ "$REPLY" = "Y" || "$REPLY" = "y" ]] || return
fi
#spacing
echo -e ""
# ensure hardware write protect disabled
[[ "$wpEnabled" = true ]] && { exit_red "\nHardware write-protect enabled, cannot restore stock firmware."; return 1; }
# default file to download to
firmware_file="/tmp/stock-firmware.rom"
echo -e ""
echo_yellow "Please select an option below for restoring the stock firmware:"
echo -e "1) Restore using a firmware backup on USB"
echo -e "2) Restore using a ChromeOS Recovery USB"
echo -e "Q) Quit and return to main menu"
echo -e ""
restore_option=-1
while :
do
read -rep "? " restore_option
case $restore_option in
1) restore_fw_from_usb || return 1;
break;
;;
2) restore_fw_from_recovery || return 1;
break;
;;
Q|q) restore_option="Q";
break;
;;
esac
done
[[ "$restore_option" = "Q" ]] && return
if [[ $restore_option -eq 2 ]]; then
#extract VPD from current firmware if present
if extract_vpd /tmp/bios.bin ; then
#merge with recovery image firmware
if [ -f /tmp/vpd.bin ]; then
echo_yellow "Merging VPD into recovery image firmware"
${cbfstoolcmd} ${firmware_file} write -r RO_VPD -f /tmp/vpd.bin > /dev/null 2>&1
fi
fi
#extract hwid from current firmware if present
if ${cbfstoolcmd} /tmp/bios.bin extract -n hwid -f /tmp/hwid.txt > /dev/null 2>&1; then
#merge with recovery image firmware
hwid="$(sed 's/^hardware_id: //' /tmp/hwid.txt 2>/dev/null)"
if [[ "$hwid" != "" ]]; then
echo_yellow "Injecting HWID into recovery image firmware"
${gbbutilitycmd} ${firmware_file} --set --hwid="$hwid" > /dev/null 2>&1
fi
fi
fi
#clear GBB flags before flashing
${gbbutilitycmd} ${firmware_file} --set --flags=0x0 > /dev/null 2>&1
#flash stock firmware
echo_yellow "Restoring stock firmware"
# only verify part of flash we write
if ! ${flashromcmd} ${flashrom_params} -N -w "${firmware_file}" -o /tmp/flashrom.log > /dev/null 2>&1; then
cat /tmp/flashrom.log
exit_red "An error occurred restoring the stock firmware. DO NOT REBOOT!"; return 1
fi
#re-enable software WP to prevent recovery issues
echo_yellow "Re-enabling software write-protect"
${flashromcmd} --wp-region WP_RO --fmap > /dev/null 2>&1
if ! ${flashromcmd} --wp-enable > /dev/null 2>&1; then
echo_red "Warning: unable to re-enable software write-protect;
you may need to perform ChromeOS recovery with the battery disconnected."
fi
#all good
echo_green "Stock firmware successfully restored."
echo_green "After rebooting, you need to restore ChromeOS using ChromeOS Recovery media.
See: https://google.com/chromeos/recovery for more info."
read -rep "Press [Enter] to return to the main menu."
#set vars to indicate new firmware type
isStock=true
isFullRom=false
isUEFI=false
firmwareType="Stock ChromeOS (pending reboot)"
}
function restore_fw_from_usb()
{
read -rep "
Connect the USB/SD device which contains the backed-up stock firmware and press [Enter] to continue. "
list_usb_devices || { exit_red "No USB devices available to read firmware backup."; return 1; }
usb_dev_index=""
while [[ "$usb_dev_index" = "" || ($usb_dev_index -le 0 && $usb_dev_index -gt $num_usb_devs) ]]; do
read -rep "Enter the number for the device which contains the stock firmware backup: " usb_dev_index
if [[ "$usb_dev_index" = "" || ($usb_dev_index -le 0 && $usb_dev_index -gt $num_usb_devs) ]]; then
echo -e "Error: Invalid option selected; enter a number from the list above."
fi
done
usb_device="${usb_devs[${usb_dev_index}-1]}"
mkdir /tmp/usb > /dev/null 2>&1
mount "${usb_device}" /tmp/usb > /dev/null 2>&1
if [ $? -ne 0 ]; then
mount "${usb_device}1" /tmp/usb
fi
if [ $? -ne 0 ]; then
echo_red "USB device failed to mount; cannot proceed."
read -rep "Press [Enter] to return to the main menu."
umount /tmp/usb > /dev/null 2>&1
return
fi
#select file from USB device
echo_yellow "\n(Potential) Firmware Files on USB:"
if ! ls /tmp/usb/*.{rom,ROM,bin,BIN} 2>/dev/null | xargs -n 1 basename 2>/dev/null; then
echo_red "No firmware files found on USB device."
read -rep "Press [Enter] to return to the main menu."
umount /tmp/usb > /dev/null 2>&1
return 1
fi
echo -e ""
read -rep "Enter the firmware filename: " firmware_file
firmware_file=/tmp/usb/${firmware_file}
if [ ! -f ${firmware_file} ]; then
echo_red "Invalid filename entered; unable to restore stock firmware."
read -rep "Press [Enter] to return to the main menu."
umount /tmp/usb > /dev/null 2>&1
return 1
fi
#text spacing
echo -e ""
}
function restore_fw_from_recovery()
{
echo -e "\nConnect a USB which contains a ChromeOS Recovery Image"
read -rep "and press [Enter] to continue. "
list_usb_devices || { exit_red "No USB devices available to read from."; return 1; }
usb_dev_index=""
while [[ "$usb_dev_index" = "" || ($usb_dev_index -le 0 && ! $usb_dev_index -gt $num_usb_devs) ]]; do
read -rep "Enter the number which corresponds your ChromeOS Recovery USB: " usb_dev_index
if [[ "$usb_dev_index" = "" || ($usb_dev_index -le 0 && $usb_dev_index -gt $num_usb_devs) ]]; then
echo -e "Error: Invalid option selected; enter a number from the list above."
fi
done
usb_device="${usb_devs[${usb_dev_index}-1]}"
echo -e ""
if ! extract_firmware_from_recovery_usb ${boardName,,} $usb_device ; then
exit_red "Error: failed to extract firmware from ChromeOS recovery USB"
return 1
fi
mv coreboot-Google_* ${firmware_file}
# set a semi-legit HWID in case we don't have a backup below
${gbbutilitycmd} --set --hwid="${boardName^^} ABC-123-XYZ-456" ${firmware_file} > /dev/null
echo_yellow "Stock firmware successfully extracted from ChromeOS recovery image"
}
######################################
# Extract firmware from recovery usb #
######################################
function extract_firmware_from_recovery_usb()
{
_board=$1
_debugfs=${2}3
_firmware=chromeos-firmwareupdate-$_board
_unpacked=$(mktemp -d)
echo_yellow "Extracting firmware from recovery USB"
printf "cd /usr/sbin\ndump chromeos-firmwareupdate $_firmware\nquit" | debugfs $_debugfs >/dev/null 2>&1
if ! sh $_firmware --unpack $_unpacked >/dev/null 2>&1; then
sh $_firmware --sb_extract $_unpacked >/dev/null 2>&1
fi
if [ -d $_unpacked/models/ ]; then
_version=$(cat $_unpacked/VERSION | grep -m 1 -e Model.*$_board -A5 | grep "BIOS (RW) version:" | cut -f2 -d: | tr -d \ )
if [ "$_version" = "" ]; then
_version=$(cat $_unpacked/VERSION | grep -m 1 -e Model.*$_board -A5 | grep "BIOS version:" | cut -f2 -d: | tr -d \ )
fi
if ! _bios_image=$(grep "IMAGE_MAIN" $_unpacked/models/$_board/setvars.sh | cut -f2 -d\"); then
exit_red "Error: failed to find a firmware image for $_board on this recovery USB"; return 1
fi
elif [ -f "$_unpacked/manifest.json" ]; then
_version=$(grep -m1 -A1 "$_board" "$_unpacked/manifest.json" | grep "host" | cut -f12 -d'"')
_bios_image=$(grep -m1 -A3 "$_board" "$_unpacked/manifest.json" | grep "image" | cut -f4 -d'"')
else
_version=$(cat $_unpacked/VERSION | grep BIOS\ version: | cut -f2 -d: | tr -d \ )
_bios_image=bios.bin
fi
if ! cp $_unpacked/$_bios_image coreboot-$_version.bin; then
exit_red "Error: failed to extract firmware image for $_board using this recovery USB"; return 1
fi
rm -rf "$_unpacked"
rm $_firmware
}
########################
# Extract firmware VPD #
########################
function extract_vpd()
{
#check params
[[ -z "$1" ]] && { exit_red "Error: extract_vpd(): missing function parameter"; return 1; }
local firmware_file="$1"
#try FMAP extraction
if ! ${cbfstoolcmd} ${firmware_file} read -r RO_VPD -f /tmp/vpd.bin >/dev/null 2>&1 ; then
#try CBFS extraction
if ! ${cbfstoolcmd} ${firmware_file} extract -n vpd.bin -f /tmp/vpd.bin >/dev/null 2>&1 ; then
echo_yellow "No VPD found in current firmware"
return 1
fi
fi
echo_yellow "VPD extracted from current firmware"
return 0
}
#########################
# Backup stock firmware #
#########################
function backup_firmware()
{
echo -e ""
read -rep "Connect the USB/SD device to store the firmware backup and press [Enter]
to continue. This is non-destructive, but it is best to ensure no other
USB/SD devices are connected. "
if ! list_usb_devices; then
backup_fail "No USB devices available to store firmware backup."
return 1
fi
usb_dev_index=""
while [[ "$usb_dev_index" = "" || ($usb_dev_index -le 0 && $usb_dev_index -gt $num_usb_devs) ]]; do
read -rep "Enter the number for the device to be used for firmware backup: " usb_dev_index
if [[ "$usb_dev_index" = "" || ($usb_dev_index -le 0 && $usb_dev_index -gt $num_usb_devs) ]]; then
echo -e "Error: Invalid option selected; enter a number from the list above."
fi
done
usb_device="${usb_devs[${usb_dev_index}-1]}"
mkdir /tmp/usb > /dev/null 2>&1
if ! mount "${usb_device}" /tmp/usb > /dev/null 2>&1; then
if ! mount "${usb_device}1" /tmp/usb > /dev/null 2>&1; then
backup_fail "USB backup device failed to mount; cannot proceed."
return 1
fi
fi
backupname="stock-firmware-${boardName}-$(date +%Y%m%d).rom"
echo_yellow "\nSaving firmware backup as ${backupname}"
if ! cp /tmp/bios.bin /tmp/usb/${backupname}; then
backup_fail "Failure copying stock firmware to USB; cannot proceed."
return 1
fi
sync
umount /tmp/usb > /dev/null 2>&1
rmdir /tmp/usb
echo_green "Firmware backup complete. Remove the USB stick and press [Enter] to continue."
read -rep ""
}
function backup_fail()
{
umount /tmp/usb > /dev/null 2>&1
rmdir /tmp/usb > /dev/null 2>&1
exit_red "\n$@"
}
####################
# Set Boot Options #
####################
function set_boot_options()
{
# set boot options via firmware boot flags
# ensure hardware write protect disabled
[[ "$wpEnabled" = true ]] && { exit_red "\nHardware write-protect enabled, cannot set Boot Options / GBB Flags."; return 1; }
echo_green "\nSet Firmware Boot Options (GBB Flags)"
echo_yellow "Select your preferred boot delay and default boot option.
You can always override the default using [CTRL+D] or
[CTRL+L] on the Developer Mode boot screen"
echo -e "1) Short boot delay (1s) + Legacy Boot/AltFw default
2) Long boot delay (30s) + Legacy Boot/AltFw default
3) Short boot delay (1s) + ChromeOS default
4) Long boot delay (30s) + ChromeOS default
5) Reset to factory default
6) Cancel/exit
"
local _flags=0x0
while :
do
read -rep "? " n
case $n in
1) _flags=0x4A9; break;;
2) _flags=0x4A8; break;;
3) _flags=0xA9; break;;
4) _flags=0xA8; break;;
5) _flags=0x0; break;;
6) read -rep "Press [Enter] to return to the main menu."; break;;
*) echo -e "invalid option";;
esac
done
[[ $n -eq 6 ]] && return
echo_yellow "\nSetting boot options..."
#disable software write-protect
if ! ${flashromcmd} --wp-disable > /dev/null 2>&1; then
exit_red "Error disabling software write-protect; unable to set GBB flags."; return 1
fi
if ! ${flashromcmd} -r -i GBB:/tmp/gbb.temp > /dev/null 2>&1; then
exit_red "\nError reading firmware (non-stock?); unable to set boot options."; return 1
fi
if ! ${gbbutilitycmd} --set --flags="${_flags}" /tmp/gbb.temp > /dev/null; then
exit_red "\nError setting boot options."; return 1
fi
if ! ${flashromcmd} -w -i GBB:/tmp/gbb.temp > /dev/null 2>&1; then
exit_red "\nError writing back firmware; unable to set boot options."; return 1
fi
echo_green "\nFirmware Boot options successfully set."
read -rep "Press [Enter] to return to the main menu."
}
###################
# Set Hardware ID #
###################
function set_hwid()
{
# set HWID using gbb_utility
# ensure hardware write protect disabled
[[ "$wpEnabled" = true ]] && { exit_red "\nHardware write-protect enabled, cannot set HWID."; return 1; }
echo_green "Set Hardware ID (HWID) using gbb_utility"
#get current HWID
_hwid="$(crossystem hwid)" >/dev/null 2>&1
if [[ "$_hwid" != "" ]]; then
echo_yellow "Current HWID is $_hwid"
fi
echo_yellow "Are you sure you know what you're doing here?
Changing this is not normally needed, and if you mess it up,
MrChromebox is not going to help you fix it. This won't let
you run a different/newer version of ChromeOS.
Proceed at your own risk."
read -rep "Really change your HWID? [y/N] " confirm
[[ "$confirm" = "Y" || "$confirm" = "y" ]] || return
read -rep "This is serious. Are you really sure? [y/N] " confirm
[[ "$confirm" = "Y" || "$confirm" = "y" ]] || return
read -rep "Enter a new HWID (use all caps): " hwid
echo -e ""
read -rep "Confirm changing HWID to $hwid [y/N] " confirm
if [[ "$confirm" = "Y" || "$confirm" = "y" ]]; then
echo_yellow "\nSetting hardware ID..."
#disable software write-protect
if ! ${flashromcmd} --wp-disable > /dev/null 2>&1; then
exit_red "Error disabling software write-protect; unable to set HWID."; return 1
fi
if ! ${flashromcmd} -r -i GBB:/tmp/gbb.temp > /dev/null 2>&1; then
exit_red "\nError reading firmware (non-stock?); unable to set HWID."; return 1
fi
if ! ${gbbutilitycmd} --set --hwid="${hwid}" /tmp/gbb.temp > /dev/null 2>&1; then
exit_red "\nError setting HWID."; return 1
fi
if ! ${flashromcmd} -w -i GBB:/tmp/gbb.temp > /dev/null 2>&1; then
exit_red "\nError writing back firmware; unable to set HWID."; return 1
fi
echo_green "Hardware ID successfully set."
fi
read -rep "Press [Enter] to return to the main menu."
}
###############
# Clear NVRAM #
###############
function clear_nvram() {
echo_green "\nClear UEFI NVRAM"
echo_yellow "Clearing the NVRAM will remove all EFI variables\nand reset the boot order to the default."
read -rep "Would you like to continue? [y/N] "
[[ "$REPLY" = "y" || "$REPLY" = "Y" ]] || return
echo_yellow "\nClearing NVRAM..."
if ! ${flashromcmd} -E -i SMMSTORE --fmap > /tmp/flashrom.log 2>&1; then
cat /tmp/flashrom.log
exit_red "\nFailed to erase SMMSTORE firmware region; NVRAM not cleared."
return 1;
fi
#all done
echo_green "NVRAM has been cleared."
read -rep "Press Enter to continue"
}
########################
# Firmware Update Menu #
########################
function menu_fwupdate() {
if [[ "$isFullRom" = true ]]; then
uefi_menu
else
stock_menu
fi
}
function show_header() {
printf "\ec"
echo -e "${NORMAL}\n ChromeOS Device Firmware Utility Script ${script_date} ${NORMAL}"
echo -e "${NORMAL} (c) Mr Chromebox <[email protected]> ${NORMAL}"
echo -e "${MENU}*********************************************************${NORMAL}"
echo -e "${MENU}**${NUMBER} Device: ${NORMAL}${deviceDesc}"
echo -e "${MENU}**${NUMBER} Board Name: ${NORMAL}${boardName^^}"
echo -e "${MENU}**${NUMBER} Platform: ${NORMAL}$deviceCpuType"
echo -e "${MENU}**${NUMBER} Fw Type: ${NORMAL}$firmwareType"
echo -e "${MENU}**${NUMBER} Fw Ver: ${NORMAL}$fwVer ($fwDate)"
if [[ $isUEFI = true && $hasUEFIoption = true ]]; then
# check if update available
curr_yy=$(echo $fwDate | cut -f 3 -d '/')
curr_mm=$(echo $fwDate | cut -f 1 -d '/')
curr_dd=$(echo $fwDate | cut -f 2 -d '/')
eval coreboot_file=$`echo "coreboot_uefi_${device}"`
date=$(echo $coreboot_file | grep -o "mrchromebox.*" | cut -f 2 -d '_' | cut -f 1 -d '.')
uefi_yy=$(echo $date | cut -c1-4)
uefi_mm=$(echo $date | cut -c5-6)
uefi_dd=$(echo $date | cut -c7-8)
if [[ ("$firmwareType" != *"pending"*) && (($uefi_yy > $curr_yy) || \
("$uefi_yy" = "$curr_yy" && "$uefi_mm" > "$curr_mm") || \
("$uefi_yy" = "$curr_yy" && "$uefi_mm" = "$curr_mm" && "$uefi_dd" > "$curr_dd")) ]]; then
echo -e "${MENU}**${NORMAL} ${GREEN_TEXT}Update Available ($uefi_mm/$uefi_dd/$uefi_yy)${NORMAL}"
fi
fi
if [ "$wpEnabled" = true ]; then
echo -e "${MENU}**${NUMBER} Fw WP: ${RED_TEXT}Enabled${NORMAL}"
WP_TEXT=${RED_TEXT}
else
echo -e "${MENU}**${NUMBER} Fw WP: ${NORMAL}Disabled"
WP_TEXT=${GREEN_TEXT}
fi
echo -e "${MENU}*********************************************************${NORMAL}"
}
function stock_menu() {
show_header
if [[ "$unlockMenu" = true || ( "$isFullRom" = false && "$isBootStub" = false && "$isUnsupported" = false \
&& "$isCmlBook" = false && "$isEOL" = false ) ]]; then
echo -e "${MENU}**${WP_TEXT} ${NUMBER} 1)${MENU} Install/Update RW_LEGACY Firmware ${NORMAL}"
else
echo -e "${GRAY_TEXT}** ${GRAY_TEXT} 1)${GRAY_TEXT} Install/Update RW_LEGACY Firmware ${NORMAL}"
fi
if [[ "$unlockMenu" = true || "$hasUEFIoption" = true ]]; then
echo -e "${MENU}**${WP_TEXT} [WP]${NUMBER} 2)${MENU} Install/Update UEFI (Full ROM) Firmware ${NORMAL}"
else
echo -e "${GRAY_TEXT}** ${GRAY_TEXT} 2)${GRAY_TEXT} Install/Update UEFI (Full ROM) Firmware${NORMAL}"