| # Copyright 2015 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. |
| |
| """Servo health checks for moblab.""" |
| |
| from __future__ import print_function |
| |
| from util import osutils |
| |
| SERVO_VID = '18d1' |
| SERVO_PID = ['5002', '501b'] |
| |
| |
| class ServoExists(object): |
| """Verfies that a Servo is connected to moblab.""" |
| |
| def Check(self): |
| """Verify that a Servo is connected. |
| |
| Returns: |
| 0 if a Servo exists. |
| 1 if a Servo device could not be found. |
| """ |
| cmd = ['lsusb'] |
| usbs = osutils.sudo_run_command(cmd).strip() |
| for pid in SERVO_PID: |
| servo_id = '%s:%s' % (SERVO_VID, pid) |
| for usb in usbs.split('\n'): |
| if servo_id in usb: |
| return 0 |
| return 1 |
| |
| def Diagnose(self, errcode): |
| if 1 == errcode: |
| return ('No servo devices are connected.', []) |
| |
| return ('Unknown error reached with error code: %s' % errcode, []) |
