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