firmware_ECWatchdog.py revision a051510c53dbbd01f768a2546098ec73ba325221 
1# Copyright (c) 2012 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
6import time
7
8from autotest_lib.client.common_lib import error
9from autotest_lib.server.cros.faftsequence import FAFTSequence
10
11class firmware_ECWatchdog(FAFTSequence):
12    """
13    Servo based EC watchdog test.
14    """
15    version = 1
16
17
18    # Delay of spin-wait in ms. Should be long enough to trigger watchdog reset.
19    WATCHDOG_DELAY = 3000
20
21    # Delay of EC power on.
22    EC_BOOT_DELAY = 1000
23
24
25    def setup(self):
26        super(firmware_ECWatchdog, self).setup()
27        # Only run in normal mode
28        self.setup_dev_mode(False)
29
30
31    def reboot_by_watchdog(self):
32        """
33        Trigger a watchdog reset.
34        """
35        self.faft_client.system.run_shell_command("sync")
36        self.ec.send_command("waitms %d" % self.WATCHDOG_DELAY)
37        time.sleep((self.WATCHDOG_DELAY + self.EC_BOOT_DELAY) / 1000.0)
38        self.check_lid_and_power_on()
39
40
41    def run_once(self):
42        if not self.check_ec_capability():
43            raise error.TestNAError("Nothing needs to be tested on this device")
44        self.register_faft_sequence((
45            {   # Step 1, trigger a watchdog reset and power on system again.
46                'reboot_action': self.reboot_by_watchdog,
47            },
48            {   # Step 2, dummy step to make sure step 1 reboots
49            }
50        ))
51        self.run_faft_sequence()
52