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#!/usr/bin/env python
# Copyright 2015 The Chromium 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 sys
if sys.platform == 'win32':
raise ImportError('devil.utils.reset_usb only supported on unix systems.')
import argparse
import fcntl
import logging
import os
import re
if __name__ == '__main__':
sys.path.append(
os.path.abspath(os.path.join(os.path.dirname(__file__),
'..', '..')))
from devil.android import device_errors
from devil.utils import lsusb
from devil.utils import run_tests_helper
logger = logging.getLogger(__name__)
_INDENTATION_RE = re.compile(r'^( *)')
_LSUSB_BUS_DEVICE_RE = re.compile(r'^Bus (\d{3}) Device (\d{3}):')
_LSUSB_ENTRY_RE = re.compile(r'^ *([^ ]+) +([^ ]+) *([^ ].*)?$')
_LSUSB_GROUP_RE = re.compile(r'^ *([^ ]+.*):$')
_USBDEVFS_RESET = ord('U') << 8 | 20
def reset_usb(bus, device):
"""Reset the USB device with the given bus and device."""
usb_file_path = '/dev/bus/usb/%03d/%03d' % (bus, device)
with open(usb_file_path, 'w') as usb_file:
logger.debug('fcntl.ioctl(%s, %d)', usb_file_path, _USBDEVFS_RESET)
fcntl.ioctl(usb_file, _USBDEVFS_RESET)
def reset_android_usb(serial):
"""Reset the USB device for the given Android device."""
lsusb_info = lsusb.lsusb()
bus = None
device = None
for device_info in lsusb_info:
device_serial = lsusb.get_lsusb_serial(device_info)
if device_serial == serial:
bus = int(device_info.get('bus'))
device = int(device_info.get('device'))
if bus and device:
reset_usb(bus, device)
else:
raise device_errors.DeviceUnreachableError(
'Unable to determine bus(%s) or device(%s) for device %s'
% (bus, device, serial))
def reset_all_android_devices():
"""Reset all USB devices that look like an Android device."""
_reset_all_matching(lambda i: bool(lsusb.get_lsusb_serial(i)))
def _reset_all_matching(condition):
lsusb_info = lsusb.lsusb()
for device_info in lsusb_info:
if int(device_info.get('device')) != 1 and condition(device_info):
bus = int(device_info.get('bus'))
device = int(device_info.get('device'))
try:
reset_usb(bus, device)
serial = lsusb.get_lsusb_serial(device_info)
if serial:
logger.info(
'Reset USB device (bus: %03d, device: %03d, serial: %s)',
bus, device, serial)
else:
logger.info(
'Reset USB device (bus: %03d, device: %03d)',
bus, device)
except IOError:
logger.error(
'Failed to reset USB device (bus: %03d, device: %03d)',
bus, device)
def main():
parser = argparse.ArgumentParser()
parser.add_argument('-v', '--verbose', action='count')
parser.add_argument('-s', '--serial')
parser.add_argument('--bus', type=int)
parser.add_argument('--device', type=int)
args = parser.parse_args()
run_tests_helper.SetLogLevel(args.verbose)
if args.serial:
reset_android_usb(args.serial)
elif args.bus and args.device:
reset_usb(args.bus, args.device)
else:
parser.error('Unable to determine target. '
'Specify --serial or BOTH --bus and --device.')
return 0
if __name__ == '__main__':
sys.exit(main())
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