1 # Copyright 2015 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 """This is a USB type C USB3 probing test using Plankton board.""" 6 7 import logging 8 import re 9 10 from autotest_lib.client.bin import utils 11 from autotest_lib.client.common_lib import error 12 from autotest_lib.server.cros.faft.firmware_test import FirmwareTest 13 14 class firmware_TypeCProbeUSB3(FirmwareTest): 15 """USB type C USB3 probing test.""" 16 version = 1 17 18 RE_SUPERSPEED_DEVICE = r' Port \d+: .+, 5000M$' 19 CHARGING_VOLTAGE = 12 20 SINK = 0 21 POLL_USB3_SECS = 10 22 23 24 def get_usb_devices_and_buses(self): 25 """Gets set from the list of USB devices and buses.""" 26 result = self.plankton_host.run_short('lsusb -t') 27 return set(result.stdout.splitlines()) 28 29 30 def is_superspeed(self, lsusb_line): 31 """Checks if the lsusb output contains 5000M.""" 32 return re.search(self.RE_SUPERSPEED_DEVICE, lsusb_line) 33 34 35 def run_once(self): 36 """Checks DUT USB3 device. 37 38 @raise TestFail: If USB3 can't be found when switch to USB mode. 39 """ 40 # Enumerate USB devices when charging. 41 self.plankton.charge(self.CHARGING_VOLTAGE) 42 devices_charging = self.get_usb_devices_and_buses() 43 logging.info('number of devices while charging: %d', 44 len(devices_charging)) 45 # Enumerate USB devices when switching to DP. 46 self.plankton.set_usbc_mux('dp') 47 self.plankton.charge(self.SINK) 48 self.plankton.poll_pd_state('sink') 49 devices_dp = self.get_usb_devices_and_buses() 50 self.plankton.charge(self.CHARGING_VOLTAGE) 51 logging.info('number of devices when switch to dp: %d', 52 len(devices_dp)) 53 # Enumerate USB devices when switching to USB3 54 self.plankton.set_usbc_mux('usb') 55 self.plankton.charge(self.SINK) 56 self.plankton.poll_pd_state('sink') 57 # It takes a short period for DUT to get USB3.0 device. 58 utils.poll_for_condition( 59 lambda: len(self.get_usb_devices_and_buses()) > len(devices_dp), 60 exception=error.TestFail( 61 'Can\'t find new device when switching to USB ' 62 'after %d seconds' % self.POLL_USB3_SECS), 63 timeout=self.POLL_USB3_SECS) 64 devices_usb = self.get_usb_devices_and_buses() 65 self.plankton.charge(self.CHARGING_VOLTAGE) 66 logging.info('number of devices when switch to usb: %d', 67 len(devices_usb)) 68 69 # For Samus USB2.0 signal power swap while usbc_role changes due to 70 # lack of UFP. Port number of lsusb may change since the device is 71 # disconnected for a short period. 72 if len(devices_dp) != len(devices_charging): 73 raise error.TestFail( 74 'Number of USB devices changed on switching to DP') 75 76 if not any(map(self.is_superspeed, devices_usb - devices_dp)): 77 raise error.TestFail('Can\'t find new USB3 device') 78
