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      1 # Copyright (c) 2011 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 
      6 # DESCRIPTION :
      7 #
      8 # This is a hardware test for EC. The test uses ectool to check if the EC can
      9 # receive message from host and send expected reponse back to host. It also
     10 # checks basic EC functionality, such as FAN and temperature sensor.
     11 
     12 
     13 import logging
     14 import time
     15 
     16 from autotest_lib.client.bin import test
     17 from autotest_lib.client.common_lib import error
     18 from autotest_lib.client.cros import ec as cros_ec
     19 from autotest_lib.client.cros.power import power_utils
     20 
     21 
     22 class hardware_EC(test.test):
     23     """Class for hardware_EC test."""
     24     version = 1
     25 
     26     def run_once(self,
     27                  num_temp_sensor=0,
     28                  temp_sensor_to_test=None,
     29                  test_fan=False,
     30                  fan_rpm_error_margin=200,
     31                  test_battery=None,
     32                  test_lightbar=False,
     33                  fan_delay_secs=3):
     34 
     35         ec = cros_ec.EC()
     36 
     37         if not cros_ec.has_ectool() or not ec.hello(ignore_status=True):
     38             raise error.TestNAError('No support for Google EC')
     39 
     40         if test_battery is None:
     41             test_battery = power_utils.has_battery()
     42 
     43         if test_fan:
     44             try:
     45                 ec.set_fanspeed(10000)
     46                 time.sleep(fan_delay_secs)
     47                 max_reading = ec.get_fanspeed()
     48                 if max_reading == 0:
     49                     raise error.TestError('Unable to start fan')
     50 
     51                 target_fanspeed = max_reading / 2
     52                 ec.set_fanspeed(target_fanspeed)
     53                 time.sleep(fan_delay_secs)
     54                 current_reading = ec.get_fanspeed()
     55 
     56                 # Sometimes the actual fan speed is close but not equal to
     57                 # the target speed, so we add some error margin here.
     58                 lower_bound = target_fanspeed - fan_rpm_error_margin
     59                 upper_bound = target_fanspeed + fan_rpm_error_margin
     60                 if not (lower_bound <= current_reading <= upper_bound):
     61                     raise error.TestError('Unable to set fan speed')
     62             finally:
     63                 ec.auto_fan_ctrl()
     64 
     65         if temp_sensor_to_test is None:
     66             temp_sensor_to_test = list(range(num_temp_sensor))
     67 
     68         for idx in temp_sensor_to_test:
     69             temperature = ec.get_temperature(idx) - 273
     70             if temperature < 0 or temperature > 100:
     71                 raise error.TestError(
     72                         'Abnormal temperature reading on sensor %d' % idx)
     73 
     74         if test_battery:
     75             try:
     76                 logging.info('Battery temperature %d K',
     77                              ec.get_temperature(name='Battery'))
     78             except cros_ec.ECError as e:
     79                 logging.debug('ECError: %s', e)
     80                 logging.warning('No battery temperature via EC.')
     81 
     82             try:
     83                 if not ec.get_battery():
     84                     raise error.TestError('Battery communication failed')
     85             except cros_ec.ECError as e:
     86                 logging.debug('ECError: %s', e)
     87                 logging.warning('No battery info via EC.')
     88 
     89         if test_lightbar and not ec.get_lightbar():
     90             raise error.TestError('Lightbar communication failed')
     91