1 # Copyright 2016 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 5 import logging 6 7 from autotest_lib.client.common_lib import error 8 from autotest_lib.server.cros.faft.firmware_test import FirmwareTest 9 from autotest_lib.server.cros.servo import pd_device 10 11 12 class firmware_PDResetHard(FirmwareTest): 13 """ 14 USB PD hard reset test. 15 16 Hard resets are issued by both ends of the connection. If the DUT 17 is dualrole capable, then a power role swap is executed, and the 18 test is repeated with the DUT in the opposite power role. Pass 19 criteria is that all attempted hard resets are successful. 20 21 """ 22 version = 1 23 RESET_ITERATIONS = 5 24 25 def _test_hard_reset(self, port_pair): 26 """Tests hard reset initated by both ends of PD connection 27 28 @param port_pair: list of 2 connected PD devices 29 """ 30 for dev in port_pair: 31 for _ in xrange(self.RESET_ITERATIONS): 32 try: 33 if dev.hard_reset() == False: 34 raise error.TestFail('Hard Reset Failed') 35 except NotImplementedError: 36 logging.warn('Device cant hard reset ... skipping') 37 break 38 39 def initialize(self, host, cmdline_args): 40 super(firmware_PDResetHard, self).initialize(host, cmdline_args) 41 # Only run in normal mode 42 self.switcher.setup_mode('normal') 43 # Turn off console prints, except for USBPD. 44 self.usbpd.send_command('chan 0x08000000') 45 46 def cleanup(self): 47 self.usbpd.send_command('chan 0xffffffff') 48 super(firmware_PDResetHard, self).cleanup() 49 50 def run_once(self): 51 """Execute Power Role swap test. 52 53 1. Verify that pd console is accessible 54 2. Verify that DUT has a valid PD contract 55 3. Make sure dualrole mode is enabled on both ends 56 4. Test Hard Reset initiated by both ends of connection 57 5. Attempt to change power roles 58 If power role changed, then retest soft resets 59 Else end test. 60 61 """ 62 # Create list of available UART consoles 63 consoles = [self.usbpd, self.plankton] 64 port_partner = pd_device.PDPortPartner(consoles) 65 # Identify a valid test port pair 66 port_pair = port_partner.identify_pd_devices() 67 if not port_pair: 68 raise error.TestFail('No PD connection found!') 69 70 # Test hard resets initiated by both ends 71 self._test_hard_reset(port_pair) 72 # Attempt to swap power roles 73 try: 74 if port_pair[0].pr_swap() == False: 75 logging.warn('Power role not swapped, ending test') 76 return 77 except NotImplementedError: 78 logging.warn('device cant send power role swap command, end test') 79 return 80 # Power role has been swapped, retest. 81 self._test_hard_reset(port_pair) 82 83