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      1 #!/usr/bin/env python
      2 #
      3 # Copyright (c) 2012 The Chromium OS Authors. All rights reserved.
      4 # Use of this source code is governed by a BSD-style license that can be
      5 # found in the LICENSE file.
      6 
      7 import logging
      8 import re
      9 
     10 from subprocess import Popen, PIPE
     11 
     12 from autotest_lib.client.bin import test
     13 from autotest_lib.client.bin import utils
     14 from autotest_lib.client.common_lib import error
     15 
     16 # Keys for udev db
     17 KEY_NAME = 'NAME'
     18 KEY_DEVPATH = 'DEVPATH'
     19 KEY_ID_INPUT_TOUCHPAD = 'ID_INPUT_TOUCHPAD'
     20 
     21 # True equivalences
     22 TRUE_EQ = ['1', 'on', 'true', 'yes']
     23 
     24 # Regular expressions for cmt module related log
     25 UNLOAD_CMT_RE = r'UnloadModule.*cmt'
     26 USE_CMT_STRING = "Using input driver 'cmt' for '%s'"
     27 
     28 # Path to xorg log
     29 XORG_LOG_PATH = '/var/log/Xorg.0.log'
     30 
     31 
     32 class hardware_TrackpadFunction(test.test):
     33     '''Test to make sure trackpad functions correctly'''
     34     version = 1
     35 
     36     def _udev_from_string(self, device_string):
     37         # Sample lines:
     38         # P: /devices/LNXSYSTM:00/LNXPWRBN:00
     39         # E: UDEV_LOG=3
     40         # E: DEVPATH=/devices/LNXSYSTM:00/LNXPWRBN:00
     41         properties = {}
     42         for line in device_string.split('\n'):
     43             _, _, val = line.partition(': ')
     44             args = val.partition('=')
     45             if args[1] != '':
     46                 properties[args[0]] = args[2]
     47         return properties
     48 
     49     def _udevadm_export_db(self):
     50         p = Popen('udevadm info --export-db', shell=True, stdout=PIPE)
     51         output = p.communicate()[0]
     52         devs = output.split('\n\n')
     53         return [self._udev_from_string(dev) for dev in devs]
     54 
     55     def run_once(self):
     56         """Test if cmt driver is loaded correctly.
     57         """
     58         # TODO(ihf): Delete this test once all boards run freon.
     59         if utils.is_freon():
     60             return
     61 
     62         devices = self._udevadm_export_db()
     63         named_devices = [dev for dev in devices if KEY_NAME in dev]
     64 
     65         touchpad_devices = []
     66         for named_device in named_devices:
     67             dev_path = named_device.get(KEY_DEVPATH)
     68             for dev in devices:
     69                 # Use device path prefix match to examine if a named device is
     70                 # touchpad or not.
     71                 #
     72                 # Example of named device data:
     73                 #
     74                 # P: /devices/platform/i8042/serio4/input/input6
     75                 # E: UDEV_LOG=3
     76                 # E: DEVPATH=/devices/platform/i8042/serio4/input/input6
     77                 # E: PRODUCT=11/2/7/1b1
     78                 # E: NAME="SynPS/2 Synaptics TouchPad"
     79                 # E: PHYS="isa0060/serio4/input0"
     80                 #
     81                 # Example of the data whose DEVPATH prefix matches the DEVPATH
     82                 # above and ID_INPUT_TOUCHPAD is true.
     83                 #
     84                 # P: /devices/platform/i8042/serio4/input/input6/event6
     85                 # N: input/event6
     86                 # S: input/by-path/platform-i8042-serio-4-event-mouse
     87                 # E: UDEV_LOG=3
     88                 # E: DEVPATH=/devices/platform/i8042/serio4/input/input6/event6
     89                 # E: MAJOR=13
     90                 # E: MINOR=70
     91                 # E: DEVNAME=/dev/input/event6
     92                 # E: SUBSYSTEM=input
     93                 # E: ID_INPUT=1
     94                 # E: ID_INPUT_TOUCHPAD=1
     95                 if (dev.get(KEY_DEVPATH, '').find(dev_path) == 0 and
     96                         dev.get(KEY_ID_INPUT_TOUCHPAD, '') in TRUE_EQ):
     97                     touchpad_devices.append(named_device)
     98         if touchpad_devices:
     99             loaded = False
    100             for touchpad_device in touchpad_devices:
    101                 name = touchpad_device.get(KEY_NAME).strip('"')
    102                 with open(XORG_LOG_PATH, 'r') as f:
    103                     for line in f.readlines():
    104                         if USE_CMT_STRING % name in line:
    105                             logging.info('cmt loaded: %s', line)
    106                             loaded = True
    107                         if re.search(UNLOAD_CMT_RE, line, re.I):
    108                             loaded = False
    109                             break
    110 
    111                 if not loaded:
    112                     raise error.TestFail('cmt did not load for %s' % name)
    113         else:
    114             # TODO: when touchpad_devices is empty we should check the board
    115             # to see if it's expected.
    116             logging.info('no trackpad found')
    117