| # Copyright (c) 2012 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. |
| |
| import logging |
| |
| from autotest_lib.client.common_lib import error |
| from autotest_lib.server.cros import vboot_constants as vboot |
| from autotest_lib.server.cros.faft.firmware_test import FirmwareTest |
| |
| |
| class firmware_ECWriteProtect(FirmwareTest): |
| """ |
| Servo based EC write protect test. |
| """ |
| version = 1 |
| |
| def write_protect_checker(self): |
| """Checker that ensure the following write protect flags are set: |
| - wp_gpio_asserted |
| - ro_at_boot |
| - ro_now |
| - all_now |
| """ |
| try: |
| self.ec.send_command_get_output("flashinfo", |
| ["Flags:\s+wp_gpio_asserted\s+ro_at_boot\s+ro_now\s+all_now"]) |
| return True |
| except error.TestFail: |
| # Didn't get expected flags |
| return False |
| |
| def initialize(self, host, cmdline_args, dev_mode=False): |
| super(firmware_ECWriteProtect, self).initialize(host, cmdline_args, |
| ec_wp=False) |
| self.backup_firmware() |
| self.switcher.setup_mode('dev' if dev_mode else 'normal') |
| self.ec.send_command("chan 0") |
| |
| def cleanup(self): |
| try: |
| self.ec.send_command("chan 0xffffffff") |
| self.restore_firmware() |
| except Exception as e: |
| logging.error("Caught exception: %s", str(e)) |
| super(firmware_ECWriteProtect, self).cleanup() |
| |
| def run_once(self): |
| flags = self.faft_client.bios.get_preamble_flags('a') |
| if flags & vboot.PREAMBLE_USE_RO_NORMAL == 0: |
| logging.info('The firmware USE_RO_NORMAL flag is disabled.') |
| return |
| |
| logging.info("Expected EC RO boot, enable WP and reboot EC.") |
| self.check_state((self.checkers.ro_normal_checker, 'A')) |
| self.switcher.mode_aware_reboot( |
| 'custom', lambda:self.set_ec_write_protect_and_reboot(True)) |
| |
| logging.info("Expected EC RO boot, write protected. Disable RO flag " |
| "and reboot EC.") |
| self.check_state([(self.checkers.ro_normal_checker, 'A'), |
| self.write_protect_checker]) |
| self.faft_client.bios.set_preamble_flags('a', 0) |
| self.switcher.mode_aware_reboot(reboot_type='cold') |
| |
| logging.info("Expected EC RW boot, write protected. Reboot EC by " |
| "ectool.") |
| self.check_state((self.checkers.ro_normal_checker, ('A', True))) |
| self.check_state(self.write_protect_checker) |
| self.switcher.mode_aware_reboot( |
| 'custom', lambda:self.sync_and_ec_reboot('hard')) |
| |
| logging.info("Expected EC RW boot, write protected. Restore RO " |
| "normal flag and deactivate write protect.") |
| self.check_state((self.checkers.ro_normal_checker, ('A', True))) |
| self.check_state(self.write_protect_checker) |
| self.faft_client.bios.set_preamble_flags(('a', |
| vboot.PREAMBLE_USE_RO_NORMAL)) |
| self.switcher.mode_aware_reboot( |
| 'custom', lambda:self.set_ec_write_protect_and_reboot(False)) |
| |
| logging.info("Expected EC RO boot.") |
| self.check_state((self.checkers.ro_normal_checker, 'A')) |
