init/upstart/boot-update-firmware.conf

# Copyright 2017 The Chromium OS Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.

description     "Firmware updating task before UI"
author          "chromium-os-dev@chromium.org"

start on starting ui

# This job blocks the start of UI and calls all the tasks sequentially at boot
# if the tasks:
#   1. Show up the boot message by calling `chromeos-boot-alert`.
#   2. Leave the message and enter Chrome UI normally after it is finished.
# Please make sure the tasks running here DO NOT take a long time in the no-op
# case because this job BLOCKS the UI startup.

# It has no main script so that it only runs once at boot before UI starts.
pre-start script
  # Update FPMCU firmware.
  FP_SCRIPT='/usr/sbin/bio_fw_updater'
  FP_LOG_DIR='/var/log/biod'
  FP_PRESTART_LOG='/var/log/bio_fw_updater.out'
  if [ -e ${FP_SCRIPT} ]; then
    mkdir -p "${FP_LOG_DIR}"
    logger -t "${UPSTART_JOB}" "Update FPMCU firmware."
    "${FP_SCRIPT}" "--log_dir=${FP_LOG_DIR}" >"${FP_PRESTART_LOG}" 2>&1 || \
      logger -t "${UPSTART_JOB}" "Failed to update FPMCU firmware."
    logger -t "${UPSTART_JOB}" -f "${FP_PRESTART_LOG}"
  fi

  # Update detachable keyboard firmware.
  HAMMERD_SCRIPT='/usr/share/cros/init/hammerd-at-boot.sh'
  if [ -e "${HAMMERD_SCRIPT}" ]; then
    logger -t "${UPSTART_JOB}" "Update keyboard firmware."
    "${HAMMERD_SCRIPT}" || \
      logger -t "${UPSTART_JOB}" "Failed to update keyboard firmware."
  fi
  # Update touch firmware.
  TOUCH_SCRIPT='/opt/google/touch/scripts/chromeos-touch-update.sh'
  if [ -e "${TOUCH_SCRIPT}" ]; then
    logger -t "${UPSTART_JOB}" "Update touch firmware."
    "${TOUCH_SCRIPT}" || \
      logger -t "${UPSTART_JOB}" "Failed to update touch firmware."
  fi

  # Some firmware updaters require a reboot immediately after the update. This
  # checks if one of them has created a file /tmp/force_reboot_after_fw_update.
  # If yes, and we're not booting from a removable device, then reboot.
  logit() {
    logger -t ${UPSTART_JOB} "$*"
  }
  . /usr/share/misc/chromeos-common.sh
  . /usr/sbin/write_gpt.sh

  # Check if rootfs is mounted on a removable device.
  rootdev_removable() {
    load_base_vars

    local dst_drive="$(get_fixed_dst_drive)"
    local root_drive="$(rootdev -s -d)"

    if [ -z  "${dst_drive}" ]; then
      logit "no known device"
    elif [ "${dst_drive}" != "${root_drive}" ]; then
      logit "running on removable device ${dst_drive}, not ${root_drive}"
      return 0
    else
      logit "running on disk ${root_drive}"
    fi
    return 1
  }

  REBOOT_FILE="/tmp/force_reboot_after_fw_update"
  if [ -e "${REBOOT_FILE}" ]; then
    # Immediately delete the file to avoid bootloops.
    rm -f "${REBOOT_FILE}"
    # If we're *not* booting from a removable device, then reboot the device.
    if rootdev_removable; then
      logit "rootfs on removable device, not rebooting"
    else
      logit "reboot required"
      reboot
      exit 0
    fi
  fi

  display_boot_message action restore_frecon
end script