71     host = hosts.create_host(machine_dict)
73             **servo_host.get_servo_args_for_host(host))
75     host.set_servo_host(servohost)
76     host.servo.uart_logs_dir = logs_dir
78         yield host
80         host.close()
83 def download_image_to_servo_usb(host, build):  argument
89     host.servo.image_to_servo_usb(host.stage_image_for_servo(build))
92 def install_test_image(host):  argument
100     host.servo_install()
103 def flash_firmware_using_servo(host, build):  argument
110     host.firmware_install(build)
113 def install_firmware(host, force):  argument
129     servo = host.servo
140     if not host.wait_up(timeout=host.USB_BOOT_TIMEOUT):
146         host.run('flashrom -p %s --wp-disable' % fprom,
150     pid = _start_firmware_update(host, force, fw_update_log)
151     _wait_firmware_update_process(host, pid)
152     _check_firmware_update_result(host, fw_update_log)
156     host.run('/usr/share/vboot/bin/set_gbb_flags.sh 0',
158     host.run('crossystem disable_dev_request=1',
160     host.halt()
163 def _start_firmware_update(host, force, result_file):  argument
184     return host.run_background(';'.join(cmd))
187 def _wait_firmware_update_process(host, pid, timeout=_FIRMWARE_UPDATE_TIMEOUT):  argument
196             lambda: host.run('ps -f -p %s' % pid, timeout=20).exit_status,
205         if not host.wait_up(timeout=host.USB_BOOT_TIMEOUT):
210 def _check_firmware_update_result(host, result_file):  argument
218     result = host.run('cat %s' % result_file)