hammerd/hammertests/ro_stay_ro.py

#!/usr/bin/env python3
# Copyright 2018 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.

"""Verify RO can remain in RO"""

from __future__ import print_function

import sys
import time

import common
import hammerd_api # pylint: disable=import-error


def main(argv):
  if argv:
    sys.exit('Test takes no args!')
  updater = hammerd_api.FirmwareUpdater(common.BASE_VENDOR_ID,
                                        common.BASE_PRODUCT_ID,
                                        common.BASE_USB_PATH)
  # Load EC image.
  with open(common.IMAGE, 'rb') as f:
    ec_image = f.read()
  updater.LoadEcImage(ec_image)

  common.disable_hammerd()
  common.connect_usb(updater)
  print('EC information:')
  pdu_resp = updater.GetFirstResponsePdu().contents
  print('PDU Response: %s' % pdu_resp)
  print('RO: %s' % updater.GetSectionVersion(hammerd_api.SectionName.RO))
  print('RW: %s' % updater.GetSectionVersion(hammerd_api.SectionName.RW))
  print('Current section before StayInRO cmd: %s' % updater.CurrentSection())
  assert updater.CurrentSection() == 1, 'Running section should be 1 (RW)'

  # Jump to RO by resetting base
  updater.SendSubcommand(hammerd_api.UpdateExtraCommand.ImmediateReset)
  updater.CloseUsb()
  time.sleep(0.5)
  updater.TryConnectUsb()
  updater.SendSubcommand(hammerd_api.UpdateExtraCommand.StayInRO)
  # Keep DUT in RO for 10 sec to check that it stays in RO
  time.sleep(10)

  # Reconnect, in case RO still decided to jump
  updater.CloseUsb()
  updater.TryConnectUsb()

  # Need to SendFirstPdu again after sendig cmd because
  # CurrentSection reads from results of SendFirstPdu by checking the
  # writable offset. Non Zero writable offset means RO is running
  assert updater.SendFirstPdu() is True, 'Error sending first PDU'
  updater.SendDone()
  print('Current section after StayInRO cmd: %s' % updater.CurrentSection())
  assert updater.CurrentSection() == 0, 'Running section should be 0 (RO)'
  # Reset dut
  common.sim_disconnect_connect(updater)

if __name__ == '__main__':
  sys.exit(main(sys.argv[1:]))