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 5 import logging 6 import re 7 8 from autotest_lib.client.common_lib import error 9 from autotest_lib.server.cros.faft.firmware_test import FirmwareTest 10 11 class firmware_ECBattery(FirmwareTest): 12 """ 13 Servo based EC thermal battery status report test. 14 """ 15 version = 1 16 17 # Battery status path in sysfs 18 BATTERY_STATUS = '/sys/class/power_supply/%s/status' 19 20 # Battery voltage reading path in sysfs 21 BATTERY_VOLTAGE_READING = '/sys/class/power_supply/%s/voltage_now' 22 23 # Battery current reading path in sysfs 24 BATTERY_CURRENT_READING = '/sys/class/power_supply/%s/current_now' 25 26 # Maximum allowed error of voltage reading in mV 27 VOLTAGE_MV_ERROR_MARGIN = 300 28 29 # Maximum allowed error of current reading in mA 30 CURRENT_MA_ERROR_MARGIN = 300 31 32 # Maximum allowed battery temperature in C 33 BATTERY_TEMP_UPPER_BOUND = 70 34 35 # Minimum allowed battery temperature in C 36 BATTERY_TEMP_LOWER_BOUND = 0 37 38 39 def initialize(self, host, cmdline_args): 40 super(firmware_ECBattery, self).initialize(host, cmdline_args) 41 # Only run in normal mode 42 self.switcher.setup_mode('normal') 43 self.ec.send_command("chan 0") 44 45 46 def cleanup(self): 47 self.ec.send_command("chan 0xffffffff") 48 super(firmware_ECBattery, self).cleanup() 49 50 51 def _get_battery_path(self): 52 """Get battery path in sysfs.""" 53 match = self.faft_client.system.run_shell_command_get_output( 54 'grep -iH --color=no "Battery" /sys/class/power_supply/*/type') 55 name = re.search("/sys/class/power_supply/([^/]+)/", 56 match[0]).group(1) 57 logging.info("Battery name is %s", name) 58 self._battery_status = self.BATTERY_STATUS % name 59 self._battery_voltage = self.BATTERY_VOLTAGE_READING % name 60 self._battery_current = self.BATTERY_CURRENT_READING % name 61 62 63 def _check_voltage_match(self): 64 """Check if voltage reading from kernel and servo match. 65 66 Raises: 67 error.TestFail: Raised when the two reading mismatch by more than 68 VOLTAGE_MV_ERROR_MARGIN mV. 69 """ 70 servo_reading = int(self.servo.get('ppvar_vbat_mv')) 71 # Kernel gives voltage value in uV. Convert to mV here. 72 kernel_reading = int( 73 self.faft_client.system.run_shell_command_get_output( 74 'cat %s' % self._battery_voltage)[0]) / 1000 75 logging.info("Voltage reading from servo: %dmV", servo_reading) 76 logging.info("Voltage reading from kernel: %dmV", kernel_reading) 77 if abs(servo_reading - kernel_reading) > self.VOLTAGE_MV_ERROR_MARGIN: 78 raise error.TestFail( 79 "Voltage reading from servo (%dmV) and kernel (%dmV) " 80 "mismatch." % (servo_reading, kernel_reading)) 81 82 83 def _check_current_match(self): 84 """Check if current reading from kernel and servo match. 85 86 Raises: 87 error.TestFail: Raised when the two reading mismatch by more than 88 CURRENT_MA_ERROR_MARGIN mA. 89 """ 90 # The signs of the current values from servo and kernel are not 91 # consistent across different devices. So we pick the absolute values. 92 # TODO(victoryang (at] chromium.org): Investigate the sign issue. 93 servo_reading = abs(int(self.servo.get('ppvar_vbat_ma'))) 94 # Kernel gives current value in uA. Convert to mA here. 95 kernel_reading = abs( 96 int(self.faft_client.system.run_shell_command_get_output( 97 'cat %s' % self._battery_current)[0])) / 1000 98 logging.info("Current reading from servo: %dmA", servo_reading) 99 logging.info("Current reading from kernel: %dmA", kernel_reading) 100 if abs(servo_reading - kernel_reading) > self.CURRENT_MA_ERROR_MARGIN: 101 raise error.TestFail( 102 "Current reading from servo (%dmA) and kernel (%dmA) " 103 "mismatch." % (servo_reading, kernel_reading)) 104 105 106 def _check_temperature(self): 107 """Check if battery temperature is reasonable. 108 109 Raises: 110 error.TestFail: Raised when battery tempearture is higher than 111 BATTERY_TEMP_UPPER_BOUND or lower than BATTERY_TEMP_LOWER_BOUND. 112 """ 113 battery_temp = float(self.ec.send_command_get_output("battery", 114 ["Temp:.+\(([0-9\.]+) C\)"])[0][1]) 115 logging.info("Battery temperature is %f C", battery_temp) 116 if (battery_temp > self.BATTERY_TEMP_UPPER_BOUND or 117 battery_temp < self.BATTERY_TEMP_LOWER_BOUND): 118 raise error.TestFail("Abnormal battery temperature, %.2f C." % 119 battery_temp) 120 121 122 def run_once(self): 123 if not self.check_ec_capability(['battery']): 124 raise error.TestNAError("Nothing needs to be tested on this device") 125 126 self._get_battery_path() 127 128 logging.info("Checking battery current reading...") 129 self._check_current_match() 130 131 logging.info("Checking battery voltage reading...") 132 self._check_voltage_match() 133 134 logging.info("Checking battery temperature...") 135 self._check_temperature() 136
