1# Copyright 2018 The Chromium OS Authors. All rights reserved. 2# Use of this source code is governed by a BSD-style license that can be 3# found in the LICENSE file. 4 5import logging 6 7from autotest_lib.server.cros.faft.firmware_test import FirmwareTest 8 9 10class firmware_WriteProtect(FirmwareTest): 11 """ 12 This test checks whether the hardware write-protect state reported by 13 crossystem matches the real write-protect state driven by Servo. 14 """ 15 version = 1 16 17 def initialize(self, host, cmdline_args, dev_mode=False): 18 super(firmware_WriteProtect, self).initialize(host, cmdline_args) 19 self.switcher.setup_mode('dev' if dev_mode else 'normal') 20 self._original_wp = self.servo.get('fw_wp') == 'on' 21 22 def cleanup(self): 23 try: 24 self.set_hardware_write_protect(self._original_wp) 25 except Exception as e: 26 logging.error('Caught exception: %s', str(e)) 27 super(firmware_WriteProtect, self).cleanup() 28 29 def run_once(self): 30 logging.info('Force write-protect on and reboot for a clean slate.') 31 self.set_hardware_write_protect(True) 32 self.switcher.mode_aware_reboot() 33 self.check_state((self.checkers.crossystem_checker, { 34 'wpsw_boot': '1', 35 'wpsw_cur': '1', 36 })) 37 logging.info('Now disable write-protect and check again.') 38 self.set_hardware_write_protect(False) 39 self.check_state((self.checkers.crossystem_checker, { 40 'wpsw_boot': '1', 41 'wpsw_cur': '0', 42 })) 43 logging.info('Reboot so WP change takes effect for wpsw_boot.') 44 self.switcher.mode_aware_reboot() 45 self.check_state((self.checkers.crossystem_checker, { 46 'wpsw_boot': '0', 47 'wpsw_cur': '0', 48 })) 49 logging.info('Enable write-protect again to observe final transition.') 50 self.set_hardware_write_protect(True) 51 self.check_state((self.checkers.crossystem_checker, { 52 'wpsw_boot': '0', 53 'wpsw_cur': '1', 54 })) 55