| # Copyright (c) 2012 The Chromium OS Authors. All rights reserved. |
| # Use of this source code is governed by a BSD-style license that can be |
| # found in the LICENSE file. |
| |
| import logging |
| |
| from autotest_lib.client.common_lib import error |
| from autotest_lib.server.cros.faft.firmware_test import FirmwareTest |
| |
| class firmware_ECCharging(FirmwareTest): |
| """ |
| Servo based EC charging control test. |
| """ |
| version = 1 |
| |
| # Threshold of trickle charging current in mA |
| TRICKLE_CHARGE_THRESHOLD = 100 |
| |
| def initialize(self, host, cmdline_args): |
| super(firmware_ECCharging, self).initialize(host, cmdline_args) |
| # Only run in normal mode |
| self.setup_dev_mode(False) |
| self.ec.send_command("chan 0") |
| |
| |
| def cleanup(self): |
| self.ec.send_command("chan 0xffffffff") |
| super(firmware_ECCharging, self).cleanup() |
| |
| |
| def _get_battery_desired_voltage(self): |
| """Get battery desired voltage value.""" |
| voltage = int(self.ec.send_command_get_output("battery", |
| ["V-desired:\s+0x[0-9a-f]*\s+=\s+(\d+)\s+mV"])[0][1]) |
| logging.info("Battery desired voltage = %d mV", voltage) |
| return voltage |
| |
| |
| def _get_battery_desired_current(self): |
| """Get battery desired current value.""" |
| current = int(self.ec.send_command_get_output("battery", |
| ["I-desired:\s+0x[0-9a-f]*\s+=\s+(\d+)\s+mA"])[0][1]) |
| logging.info("Battery desired current = %d mA", current) |
| return current |
| |
| |
| def _get_battery_actual_voltage(self): |
| """Get the actual voltage from charger to battery.""" |
| voltage = int(self.ec.send_command_get_output("battery", |
| ["V:\s+0x[0-9a-f]*\s+=\s+(\d+)\s+mV"])[0][1]) |
| logging.info("Battery actual voltage = %d mV", voltage) |
| return voltage |
| |
| |
| def _get_battery_actual_current(self): |
| """Get the actual current from charger to battery.""" |
| current = int(self.ec.send_command_get_output("battery", |
| ["I:\s+0x[0-9a-f]*\s+=\s+([0-9-]+)\s+mA"])[0][1]) |
| logging.info("Battery actual current = %d mA", current) |
| return current |
| |
| |
| def _get_battery_charge(self): |
| """Get battery charge state.""" |
| charge = int(self.ec.send_command_get_output("battery", |
| ["Charge:\s+(\d+)\s+"])[0][1]) |
| logging.info("Battery charge = %d %%", charge) |
| return charge |
| |
| |
| def _get_charger_target_voltage(self): |
| """Get target charging voltage set in charger.""" |
| voltage = int(self.ec.send_command_get_output("charger", |
| ["V_batt:\s+(\d+)\s"])[0][1]) |
| logging.info("Charger target voltage = %d mV", voltage) |
| return voltage |
| |
| |
| def _get_charger_target_current(self): |
| """Get target charging current set in charger.""" |
| current = int(self.ec.send_command_get_output("charger", |
| ["I_batt:\s+(\d+)\s"])[0][1]) |
| logging.info("Charger target current = %d mA", current) |
| return current |
| |
| |
| def _get_trickle_charging(self): |
| """Check if we are trickle charging battery.""" |
| return (self._get_battery_desired_current() < |
| self.TRICKLE_CHARGE_THRESHOLD) |
| |
| |
| def _check_target_value(self): |
| """Check charger target values are correct. |
| |
| Raise: |
| error.TestFail: Raised when check fails. |
| """ |
| if (self._get_charger_target_voltage() >= |
| 1.05 * self._get_battery_desired_voltage()): |
| raise error.TestFail("Charger target voltage is too high.") |
| if (self._get_charger_target_current() >= |
| 1.05 * self._get_battery_desired_current()): |
| raise error.TestFail("Charger target current is too high.") |
| |
| |
| def _check_actual_value(self): |
| """Check actual voltage/current values are correct. |
| |
| Raise: |
| error.TestFail: Raised when check fails. |
| """ |
| if (self._get_battery_actual_voltage() >= |
| 1.05 * self._get_charger_target_voltage()): |
| raise error.TestFail("Battery actual voltage is too high.") |
| if (self._get_battery_actual_current() >= |
| 1.05 * self._get_charger_target_current()): |
| raise error.TestFail("Battery actual current is too high.") |
| |
| |
| def run_once(self): |
| if not self.check_ec_capability(['battery', 'charging']): |
| raise error.TestNAError("Nothing needs to be tested on this device") |
| if self._get_battery_charge() == 100: |
| logging.info("Battery is full. Unable to test.") |
| return |
| if self._get_trickle_charging(): |
| logging.info("Trickling charging battery. Unable to test.") |
| return |
| if self._get_battery_actual_current() < 0: |
| raise error.TestFail("This test must be run with AC power.") |
| |
| logging.info("Checking charger target values...") |
| self._check_target_value() |
| |
| logging.info("Checking battery actual values...") |
| self._check_actual_value() |
