| # 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. |
| |
| import functools |
| import logging |
| import time |
| |
| from autotest_lib.client.bin import utils |
| from autotest_lib.client.common_lib import error |
| from autotest_lib.client.common_lib.cros import cr50_utils |
| from autotest_lib.server.cros.servo import chrome_ec |
| |
| |
| def ccd_command(func): |
| """Decorator for methods only relevant to devices using CCD.""" |
| @functools.wraps(func) |
| def wrapper(instance, *args, **kwargs): |
| """Ignore ccd functions if we aren't using ccd""" |
| if instance.using_ccd(): |
| return func(instance, *args, **kwargs) |
| logging.info("not using ccd. ignoring %s", func.func_name) |
| return wrapper |
| |
| |
| class ChromeCr50(chrome_ec.ChromeConsole): |
| """Manages control of a Chrome Cr50. |
| |
| We control the Chrome Cr50 via the console of a Servo board. Chrome Cr50 |
| provides many interfaces to set and get its behavior via console commands. |
| This class is to abstract these interfaces. |
| """ |
| IDLE_COUNT = 'count: (\d+)' |
| # The version has four groups: the partition, the header version, debug |
| # descriptor and then version string. |
| # There are two partitions A and B. The active partition is marked with a |
| # '*'. If it is a debug image '/DBG' is added to the version string. If the |
| # image has been corrupted, the version information will be replaced with |
| # 'Error'. |
| # So the output may look something like this. |
| # RW_A: 0.0.21/cr50_v1.1.6133-fd788b |
| # RW_B: * 0.0.22/DBG/cr50_v1.1.6138-b9f0b1d |
| # Or like this if the region was corrupted. |
| # RW_A: * 0.0.21/cr50_v1.1.6133-fd788b |
| # RW_B: Error |
| VERSION_FORMAT = '\nRW_(A|B): +%s +(\d+\.\d+\.\d+|Error)(/DBG)?(\S+)?\s' |
| INACTIVE_VERSION = VERSION_FORMAT % '' |
| ACTIVE_VERSION = VERSION_FORMAT % '\*' |
| # Following lines of the version output may print the image board id |
| # information. eg. |
| # BID A: 5a5a4146:ffffffff:00007f00 Yes |
| # BID B: 00000000:00000000:00000000 Yes |
| # Use the first group from ACTIVE_VERSION to match the active board id |
| # partition. |
| BID_FORMAT = ':\s+([a-f0-9:]+) ' |
| ACTIVE_BID = r'%s.*\1%s' % (ACTIVE_VERSION, BID_FORMAT) |
| WAKE_CHAR = '\n' |
| START_UNLOCK_TIMEOUT = 20 |
| GETTIME = ['= (\S+)'] |
| FWMP_LOCKED_PROD = ["Managed device console can't be unlocked"] |
| FWMP_LOCKED_DBG = ['Ignoring FWMP unlock setting'] |
| MAX_RETRY_COUNT = 5 |
| START_STR = ['(.*Console is enabled;)'] |
| |
| |
| def __init__(self, servo): |
| super(ChromeCr50, self).__init__(servo, "cr50_console") |
| |
| |
| def send_command(self, commands): |
| """Send command through UART. |
| |
| Cr50 will drop characters input to the UART when it resumes from sleep. |
| If servo is not using ccd, send some dummy characters before sending the |
| real command to make sure cr50 is awake. |
| """ |
| if not self.using_ccd(): |
| super(ChromeCr50, self).send_command(self.WAKE_CHAR) |
| super(ChromeCr50, self).send_command(commands) |
| |
| |
| def send_command_get_output(self, command, regexp_list): |
| """Send command through UART and wait for response. |
| |
| Cr50 will drop characters input to the UART when it resumes from sleep. |
| If servo is not using ccd, send some dummy characters before sending the |
| real command to make sure cr50 is awake. |
| """ |
| if not self.using_ccd(): |
| super(ChromeCr50, self).send_command(self.WAKE_CHAR) |
| return super(ChromeCr50, self).send_command_get_output(command, |
| regexp_list) |
| |
| |
| def get_deep_sleep_count(self): |
| """Get the deep sleep count from the idle task""" |
| result = self.send_command_get_output('idle', [self.IDLE_COUNT]) |
| return int(result[0][1]) |
| |
| |
| def clear_deep_sleep_count(self): |
| """Clear the deep sleep count""" |
| result = self.send_command_get_output('idle c', [self.IDLE_COUNT]) |
| if int(result[0][1]): |
| raise error.TestFail("Could not clear deep sleep count") |
| |
| |
| def has_command(self, cmd): |
| """Returns 1 if cr50 has the command 0 if it doesn't""" |
| try: |
| self.send_command_get_output('help', [cmd]) |
| except: |
| logging.info("Image does not include '%s' command", cmd) |
| return 0 |
| return 1 |
| |
| |
| def erase_nvmem(self): |
| """Use flasherase to erase both nvmem sections""" |
| if not self.has_command('flasherase'): |
| raise error.TestError("need image with 'flasherase'") |
| |
| self.send_command('flasherase 0x7d000 0x3000') |
| self.send_command('flasherase 0x3d000 0x3000') |
| |
| |
| def reboot(self): |
| """Reboot Cr50 and wait for cr50 to reset""" |
| response = [] if self.using_ccd() else self.START_STR |
| self.send_command_get_output('reboot', response) |
| |
| # ccd will stop working after the reboot. Wait until that happens and |
| # reenable it. |
| if self.using_ccd(): |
| self.wait_for_reboot() |
| |
| |
| def _uart_wait_for_reboot(self, timeout=60): |
| """Wait for the cr50 to reboot and enable the console. |
| |
| This will wait up to timeout seconds for cr50 to print the start string. |
| |
| Args: |
| timeout: seconds to wait to detect the reboot. |
| """ |
| original_timeout = float(self._servo.get('cr50_console_timeout')) |
| # Change the console timeout to timeout, so we wait at least that long |
| # for cr50 to print the start string. |
| self._servo.set_nocheck('cr50_console_timeout', timeout) |
| try: |
| self.send_command_get_output('\n', self.START_STR) |
| logging.info('Detected cr50 reboot') |
| except error.TestFail, e: |
| logging.info('Failed to detect cr50 reboot') |
| # Reset the timeout. |
| self._servo.set_nocheck('cr50_console_timeout', original_timeout) |
| |
| |
| def wait_for_reboot(self, timeout=60): |
| """Wait for cr50 to reboot""" |
| if self.using_ccd(): |
| # Cr50 USB is reset when it reboots. Wait for the CCD connection to |
| # go down to detect the reboot. |
| self.wait_for_ccd_disable(timeout, raise_error=False) |
| self.ccd_enable() |
| else: |
| self._uart_wait_for_reboot(timeout) |
| |
| |
| def rollback(self, eraseflashinfo=True, chip_bid=None, chip_flags=None): |
| """Set the reset counter high enough to force a rollback then reboot |
| |
| Set the new board id before rolling back if one is given. |
| |
| Args: |
| eraseflashinfo: True if eraseflashinfo should be run before rollback |
| chip_bid: the integer representation of chip board id or None if the |
| board id should be erased during rollback |
| chip_flags: the integer representation of chip board id flags or |
| None if the board id should be erased during rollback |
| """ |
| if not self.has_command('rw') or not self.has_command('eraseflashinfo'): |
| raise error.TestError("need image with 'rw' and 'eraseflashinfo'") |
| |
| inactive_partition = self.get_inactive_version_info()[0] |
| # Increase the reset count to above the rollback threshold |
| self.send_command('rw 0x40000128 1') |
| self.send_command('rw 0x4000012c %d' % (self.MAX_RETRY_COUNT + 2)) |
| |
| # Set the board id if both the board id and flags have been given. |
| set_bid = chip_bid and chip_flags |
| |
| # Erase the infomap |
| if eraseflashinfo or set_bid: |
| self.send_command('eraseflashinfo') |
| |
| # Update the board id after it has been erased |
| if set_bid: |
| self.send_command('bid 0x%x 0x%x' % (chip_bid, chip_flags)) |
| |
| self.reboot() |
| |
| running_partition = self.get_active_version_info()[0] |
| if inactive_partition != running_partition: |
| raise error.TestError("Failed to rollback to inactive image") |
| |
| |
| def rolledback(self): |
| """Returns true if cr50 just rolled back""" |
| return int(self._servo.get('cr50_reset_count')) > self.MAX_RETRY_COUNT |
| |
| |
| def get_version_info(self, regexp): |
| """Get information from the version command""" |
| return self.send_command_get_output('ver', [regexp])[0][1::] |
| |
| |
| def get_inactive_version_info(self): |
| """Get the active partition, version, and hash""" |
| return self.get_version_info(self.INACTIVE_VERSION) |
| |
| |
| def get_active_version_info(self): |
| """Get the active partition, version, and hash""" |
| return self.get_version_info(self.ACTIVE_VERSION) |
| |
| |
| def get_active_board_id_str(self): |
| """Get the running image board id. |
| |
| Returns: |
| The board id string or None if the image does not support board id |
| or the image is not board id locked. |
| """ |
| # Getting the board id from the version console command is only |
| # supported in board id locked images .22 and above. Any image that is |
| # board id locked will have support for getting the image board id. |
| # |
| # If board id is not supported on the device, return None. This is |
| # still expected on all current non board id locked release images. |
| # |
| # TODO(mruthven): switch to only trying once when getting the cr50 |
| # console command output becomes entirely reliable. |
| for i in range(3): |
| try: |
| version_info = self.get_version_info(self.ACTIVE_BID) |
| break |
| except error.TestFail, e: |
| logging.info(e.message) |
| version_info = None |
| |
| if not version_info: |
| logging.info('Cannot use the version to get the board id') |
| return None |
| |
| bid = version_info[-1] |
| logging.info('%r %r', version_info, bid) |
| |
| return bid if bid != cr50_utils.EMPTY_IMAGE_BID else None |
| |
| |
| def get_version(self): |
| """Get the RW version""" |
| return self.get_active_version_info()[1].strip() |
| |
| |
| def using_servo_v4(self): |
| """Returns true if the console is being served using servo v4""" |
| return 'servo_v4' in self._servo.get_servo_version() |
| |
| |
| def using_ccd(self): |
| """Returns true if the console is being served using CCD""" |
| return 'ccd_cr50' in self._servo.get_servo_version() |
| |
| |
| @ccd_command |
| def get_ccd_state(self): |
| """Get the CCD state from servo |
| |
| Returns: |
| 'off' or 'on' based on whether the cr50 console is working. |
| """ |
| return self._servo.get('ccd_state') |
| |
| |
| @ccd_command |
| def wait_for_ccd_state(self, state, timeout, raise_error=True): |
| """Wait up to timeout seconds for CCD to be 'on' or 'off' |
| Args: |
| state: a string either 'on' or 'off'. |
| timeout: time in seconds to wait |
| raise_error: Raise TestFail if the value is state is not reached. |
| |
| Raises |
| TestFail if ccd never reaches the specified state |
| """ |
| logging.info("Wait until ccd is '%s'", state) |
| value = utils.wait_for_value(self.get_ccd_state, state, |
| timeout_sec=timeout) |
| if value != state: |
| error_msg = "timed out before detecting ccd '%s'" % state |
| if raise_error: |
| raise error.TestFail(error_msg) |
| logging.warning(error_msg) |
| logging.info("ccd is '%s'", value) |
| |
| |
| @ccd_command |
| def wait_for_ccd_disable(self, timeout=60, raise_error=True): |
| """Wait for the cr50 console to stop working""" |
| self.wait_for_ccd_state('off', timeout, raise_error) |
| |
| |
| @ccd_command |
| def wait_for_ccd_enable(self, timeout=60): |
| """Wait for the cr50 console to start working""" |
| self.wait_for_ccd_state('on', timeout) |
| |
| |
| def ccd_disable(self): |
| """Change the values of the CC lines to disable CCD""" |
| if self.using_servo_v4(): |
| logging.info("disable ccd") |
| self._servo.set_nocheck('servo_v4_dts_mode', 'off') |
| self.wait_for_ccd_disable() |
| |
| |
| @ccd_command |
| def ccd_enable(self): |
| """Reenable CCD and reset servo interfaces""" |
| logging.info("reenable ccd") |
| self._servo.set_nocheck('servo_v4_dts_mode', 'on') |
| self._servo.set_nocheck('power_state', 'ccd_reset') |
| self.wait_for_ccd_enable() |
| |
| |
| def _level_change_req_pp(self, level): |
| """Returns True if setting the level will require physical presence""" |
| testlab_pp = level != 'testlab open' and 'testlab' in level |
| open_pp = level == 'open' |
| return testlab_pp or open_pp |
| |
| |
| def ccd_set_level(self, level): |
| """Increase the console timeout and try disabling the lock.""" |
| # TODO(mruthven): add support for CCD password |
| level = level.lower().strip() |
| |
| if level in self._servo.get('cr50_ccd_level').lower(): |
| logging.info('CCD privilege level is already %s', level) |
| return |
| |
| if 'testlab' in level: |
| raise error.TestError("Can't change testlab mode using " |
| "ccd_set_level") |
| |
| testlab_enabled = self._servo.get('cr50_testlab') == 'enabled' |
| req_pp = self._level_change_req_pp(level) |
| has_pp = not self.using_ccd() |
| dbg_en = 'DBG' in self._servo.get('cr50_version') |
| |
| if req_pp and not has_pp: |
| raise error.TestError("Can't change privilege level to '%s' " |
| "without physical presence." % level) |
| |
| if not testlab_enabled and not has_pp: |
| raise error.TestError("Wont change privilege level without " |
| "physical presence or testlab mode enabled") |
| |
| resp = ['(Access Denied|%sCCD %s)' % ('Starting ' if req_pp else '', |
| level)] |
| # Start the unlock process. |
| rv = self.send_command_get_output('ccd %s' % level, resp) |
| if 'Access Denied' in rv[0][1]: |
| raise error.TestFail("'ccd %s' Access Denied" % level) |
| |
| if req_pp: |
| # DBG images have shorter unlock processes |
| unlock_timeout = 15 if dbg_en else 300 |
| end_time = time.time() + unlock_timeout |
| |
| logging.info('Pressing power button for %ds to unlock the console.', |
| unlock_timeout) |
| logging.info('The process should end at %s', time.ctime(end_time)) |
| |
| # Press the power button once a second to unlock the console. |
| while time.time() < end_time: |
| self._servo.power_short_press() |
| time.sleep(1) |
| |
| if level not in self._servo.get('cr50_ccd_level').lower(): |
| raise error.TestFail('Could not set privilege level to %s' % level) |
| |
| logging.info('Successfully set CCD privelege level to %s', level) |
| |
| |
| def gettime(self): |
| """Get the current cr50 system time""" |
| result = self.send_command_get_output('gettime', [' = (.*) s']) |
| return float(result[0][1]) |
| |
| |
| def wait_until_update_is_allowed(self): |
| """Wait until cr50 will be able to accept an update. |
| |
| Cr50 rejects any attempt to update if it has been less than 60 seconds |
| since it last recovered from deep sleep or came up from reboot. This |
| will wait until cr50 gettime shows a time greater than 60. |
| """ |
| if self.get_active_version_info()[2]: |
| logging.info("Running DBG image. Don't need to wait for update.") |
| return |
| cr50_time = self.gettime() |
| if cr50_time < 60: |
| sleep_time = 61 - cr50_time |
| logging.info('Cr50 has been up for %ds waiting %ds before update', |
| cr50_time, sleep_time) |
| time.sleep(sleep_time) |
