310 lines
10 KiB
Python
310 lines
10 KiB
Python
# Copyright (c) 2012 The Chromium OS Authors. All rights reserved.
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# Use of this source code is governed by a BSD-style license that can be
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# found in the LICENSE file.
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import ast
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import logging
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import re
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import time
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from autotest_lib.client.common_lib import error
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from autotest_lib.client.cros import ec
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from autotest_lib.server.cros.servo import servo
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# Hostevent codes, copied from:
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# ec/include/ec_commands.h
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HOSTEVENT_LID_CLOSED = 0x00000001
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HOSTEVENT_LID_OPEN = 0x00000002
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HOSTEVENT_POWER_BUTTON = 0x00000004
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HOSTEVENT_AC_CONNECTED = 0x00000008
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HOSTEVENT_AC_DISCONNECTED = 0x00000010
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HOSTEVENT_BATTERY_LOW = 0x00000020
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HOSTEVENT_BATTERY_CRITICAL = 0x00000040
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HOSTEVENT_BATTERY = 0x00000080
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HOSTEVENT_THERMAL_THRESHOLD = 0x00000100
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HOSTEVENT_THERMAL_OVERLOAD = 0x00000200
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HOSTEVENT_THERMAL = 0x00000400
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HOSTEVENT_USB_CHARGER = 0x00000800
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HOSTEVENT_KEY_PRESSED = 0x00001000
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HOSTEVENT_INTERFACE_READY = 0x00002000
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# Keyboard recovery combo has been pressed
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HOSTEVENT_KEYBOARD_RECOVERY = 0x00004000
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# Shutdown due to thermal overload
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HOSTEVENT_THERMAL_SHUTDOWN = 0x00008000
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# Shutdown due to battery level too low
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HOSTEVENT_BATTERY_SHUTDOWN = 0x00010000
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HOSTEVENT_INVALID = 0x80000000
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# Time to wait after sending keypress commands.
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KEYPRESS_RECOVERY_TIME = 0.5
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class ChromeConsole(object):
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"""Manages control of a Chrome console.
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We control the Chrome console via the UART of a Servo board. Chrome console
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provides many interfaces to set and get its behavior via console commands.
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This class is to abstract these interfaces.
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"""
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CMD = "_cmd"
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REGEXP = "_regexp"
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MULTICMD = "_multicmd"
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def __init__(self, servo, name):
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"""Initialize and keep the servo object.
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Args:
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servo: A Servo object.
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name: The console name.
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"""
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self.name = name
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self.uart_cmd = self.name + self.CMD
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self.uart_regexp = self.name + self.REGEXP
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self.uart_multicmd = self.name + self.MULTICMD
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self._servo = servo
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self._cached_uart_regexp = None
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def set_uart_regexp(self, regexp):
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if self._cached_uart_regexp == regexp:
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return
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self._cached_uart_regexp = regexp
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self._servo.set(self.uart_regexp, regexp)
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def send_command(self, commands):
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"""Send command through UART.
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This function opens UART pty when called, and then command is sent
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through UART.
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Args:
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commands: The commands to send, either a list or a string.
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"""
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self.set_uart_regexp('None')
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if isinstance(commands, list):
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try:
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self._servo.set_nocheck(self.uart_multicmd, ';'.join(commands))
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except servo.ControlUnavailableError:
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logging.warning('The servod is too old that uart_multicmd not '
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'supported. Use uart_cmd instead.')
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for command in commands:
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self._servo.set_nocheck(self.uart_cmd, command)
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else:
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self._servo.set_nocheck(self.uart_cmd, commands)
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def has_command(self, command):
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"""Check whether EC console supports |command|.
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Args:
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command: Command to look for.
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Returns:
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True: If the |command| exist on the EC image of the device.
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False: If the |command| does not exist on the EC image of the device.
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"""
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result = None
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try:
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# Throws error.TestFail (on timeout) if it cannot find a line with
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# 'command' in the output. Thus return False in that case.
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result = self.send_command_get_output('help', [command])
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except error.TestFail:
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return False
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return result is not None
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def send_command_get_output(self, command, regexp_list):
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"""Send command through UART and wait for response.
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This function waits for response message matching regular expressions.
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Args:
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command: The command sent.
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regexp_list: List of regular expressions used to match response
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message. Note, list must be ordered.
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Returns:
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List of tuples, each of which contains the entire matched string and
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all the subgroups of the match. None if not matched.
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For example:
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response of the given command:
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High temp: 37.2
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Low temp: 36.4
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regexp_list:
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['High temp: (\d+)\.(\d+)', 'Low temp: (\d+)\.(\d+)']
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returns:
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[('High temp: 37.2', '37', '2'), ('Low temp: 36.4', '36', '4')]
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Raises:
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error.TestError: An error when the given regexp_list is not valid.
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"""
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if not isinstance(regexp_list, list):
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raise error.TestError('Arugment regexp_list is not a list: %s' %
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str(regexp_list))
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self.set_uart_regexp(str(regexp_list))
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self._servo.set_nocheck(self.uart_cmd, command)
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return ast.literal_eval(self._servo.get(self.uart_cmd))
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class ChromeEC(ChromeConsole):
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"""Manages control of a Chrome EC.
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We control the Chrome EC via the UART of a Servo board. Chrome EC
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provides many interfaces to set and get its behavior via console commands.
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This class is to abstract these interfaces.
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"""
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def __init__(self, servo, name="ec_uart"):
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super(ChromeEC, self).__init__(servo, name)
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def key_down(self, keyname):
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"""Simulate pressing a key.
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Args:
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keyname: Key name, one of the keys of KEYMATRIX.
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"""
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self.send_command('kbpress %d %d 1' %
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(ec.KEYMATRIX[keyname][1], ec.KEYMATRIX[keyname][0]))
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def key_up(self, keyname):
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"""Simulate releasing a key.
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Args:
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keyname: Key name, one of the keys of KEYMATRIX.
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"""
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self.send_command('kbpress %d %d 0' %
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(ec.KEYMATRIX[keyname][1], ec.KEYMATRIX[keyname][0]))
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def key_press(self, keyname):
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"""Press and then release a key.
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Args:
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keyname: Key name, one of the keys of KEYMATRIX.
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"""
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self.send_command([
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'kbpress %d %d 1' %
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(ec.KEYMATRIX[keyname][1], ec.KEYMATRIX[keyname][0]),
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'kbpress %d %d 0' %
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(ec.KEYMATRIX[keyname][1], ec.KEYMATRIX[keyname][0]),
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])
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# Don't spam the EC console as fast as we can; leave some recovery time
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# in between commands.
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time.sleep(KEYPRESS_RECOVERY_TIME)
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def send_key_string_raw(self, string):
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"""Send key strokes consisting of only characters.
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Args:
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string: Raw string.
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"""
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for c in string:
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self.key_press(c)
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def send_key_string(self, string):
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"""Send key strokes including special keys.
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Args:
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string: Character string including special keys. An example
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is "this is an<tab>example<enter>".
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"""
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for m in re.finditer("(<[^>]+>)|([^<>]+)", string):
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sp, raw = m.groups()
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if raw is not None:
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self.send_key_string_raw(raw)
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else:
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self.key_press(sp)
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def reboot(self, flags=''):
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"""Reboot EC with given flags.
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Args:
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flags: Optional, a space-separated string of flags passed to the
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reboot command, including:
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default: EC soft reboot;
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'hard': EC hard/cold reboot;
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'ap-off': Leave AP off after EC reboot (by default, EC turns
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AP on after reboot if lid is open).
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Raises:
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error.TestError: If the string of flags is invalid.
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"""
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for flag in flags.split():
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if flag not in ('hard', 'ap-off'):
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raise error.TestError(
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'The flag %s of EC reboot command is invalid.' % flag)
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self.send_command("reboot %s" % flags)
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def set_flash_write_protect(self, enable):
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"""Set the software write protect of EC flash.
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Args:
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enable: True to enable write protect, False to disable.
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"""
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if enable:
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self.send_command("flashwp enable")
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else:
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self.send_command("flashwp disable")
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def set_hostevent(self, codes):
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"""Set the EC hostevent codes.
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Args:
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codes: Hostevent codes, HOSTEVENT_*
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"""
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self.send_command("hostevent set %#x" % codes)
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# Allow enough time for EC to process input and set flag.
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# See chromium:371631 for details.
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# FIXME: Stop importing time module if this hack becomes obsolete.
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time.sleep(1)
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def enable_console_channel(self, channel):
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"""Find console channel mask and enable that channel only
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@param channel: console channel name
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"""
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# The 'chan' command returns a list of console channels,
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# their channel masks and channel numbers
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regexp = r'(\d+)\s+([\w]+)\s+\*?\s+{0}'.format(channel)
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l = self.send_command_get_output('chan', [regexp])
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# Use channel mask and append the 0x for proper hex input value
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cmd = 'chan 0x' + l[0][2]
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# Set console to only output the desired channel
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self.send_command(cmd)
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def get_version(self):
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"""Get version information from the Chrome EC console.
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Additionally, can be used to verify if EC console is available.
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"""
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self.send_command("chan 0")
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expected_output = ["Chip:\s+([^\r\n]*)\r\n",
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"RO:\s+([^\r\n]*)\r\n",
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"RW_?[AB]?:\s+([^\r\n]*)\r\n",
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"Build:\s+([^\r\n]*)\r\n"]
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l = self.send_command_get_output("version", expected_output)
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self.send_command("chan 0xffffffff")
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return l
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class ChromeUSBPD(ChromeEC):
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"""Manages control of a Chrome USBPD.
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We control the Chrome EC via the UART of a Servo board. Chrome USBPD
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provides many interfaces to set and get its behavior via console commands.
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This class is to abstract these interfaces.
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"""
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def __init__(self, servo):
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super(ChromeUSBPD, self).__init__(servo, "usbpd_uart")
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