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      1 # Copyright (c) 2015 The Chromium OS Authors. All rights reserved.
      2 # Use of this source code is governed by a BSD-style license that can be
      3 # found in the LICENSE file.
      4 """
      5 MBIM_CID_DEVICE_SERVICES Sequence
      6 
      7 Reference:
      8     [1] Universal Serial Bus Communication Class MBIM Compliance Testing: 22
      9         http://www.usb.org/developers/docs/devclass_docs/MBIM-Compliance-1.0.pdf
     10 """
     11 import common
     12 from autotest_lib.client.cros.cellular.mbim_compliance import mbim_channel
     13 from autotest_lib.client.cros.cellular.mbim_compliance \
     14         import mbim_command_message
     15 from autotest_lib.client.cros.cellular.mbim_compliance import mbim_constants
     16 from autotest_lib.client.cros.cellular.mbim_compliance import mbim_control
     17 from autotest_lib.client.cros.cellular.mbim_compliance import mbim_errors
     18 from autotest_lib.client.cros.cellular.mbim_compliance.sequences \
     19         import sequence
     20 
     21 
     22 class MBIMCIDDeviceServicesSequence(sequence.Sequence):
     23     """
     24     Implement |MBIMCIDDeviceServicesSequence|.
     25     In this sequence, cid |MBIM_CID_DEVICE_SERVICES| is used to query the device
     26     services supported by the MBIM devices and their properties.
     27     """
     28 
     29     def run_internal(self):
     30         """ Run the MBIM_CID_DEVICE_SERVICES Sequence. """
     31         # Step 1
     32         command_message = mbim_command_message.MBIMDeviceServicesQuery()
     33         packets = command_message.generate_packets()
     34         device_context = self.device_context
     35         channel = mbim_channel.MBIMChannel(
     36                 device_context._device,
     37                 device_context.mbim_communication_interface.bInterfaceNumber,
     38                 device_context.interrupt_endpoint.bEndpointAddress,
     39                 device_context.max_control_transfer_size)
     40         response_packets = channel.bidirectional_transaction(*packets)
     41         channel.close()
     42 
     43         # Step 2
     44         response_message = mbim_control.parse_response_packets(response_packets)
     45 
     46         # Step 3
     47         is_message_valid = isinstance(
     48                 response_message,
     49                 mbim_command_message.MBIMDeviceServicesInfo)
     50         if ((not is_message_valid) or
     51             (response_message.message_type !=
     52              mbim_constants.MBIM_COMMAND_DONE) or
     53             (response_message.status_codes !=
     54              mbim_constants.MBIM_STATUS_SUCCESS)):
     55             mbim_errors.log_and_raise(mbim_errors.MBIMComplianceAssertionError,
     56                                       'mbim1.0:9.4.3')
     57 
     58         return command_message, response_message
     59