git.rot13.org Git - goodfet/blob - client/USB.py

   1 # USB.py
   2 #
   3 # Contains definition of USB class, which is just a container for a bunch of
   4 # constants/enums associated with the USB protocol.
   5 #
   6 # TODO: would be nice if this module could re-export the other USB* classes so
   7 # one need import only USB to get all the functionality
   8
   9 class USB:
  10     state_detached                      = 0
  11     state_attached                      = 1
  12     state_powered                       = 2
  13     state_default                       = 3
  14     state_address                       = 4
  15     state_configured                    = 5
  16     state_suspended                     = 6
  17
  18     request_direction_host_to_device    = 0
  19     request_direction_device_to_host    = 1
  20
  21     request_type_standard               = 0
  22     request_type_class                  = 1
  23     request_type_vendor                 = 2
  24
  25     request_recipient_device            = 0
  26     request_recipient_interface         = 1
  27     request_recipient_endpoint          = 2
  28     request_recipient_other             = 3
  29
  30     feature_endpoint_halt               = 0
  31     feature_device_remote_wakeup        = 1
  32     feature_test_mode                   = 2
  33
  34     desc_type_device                    = 1
  35     desc_type_configuration             = 2
  36     desc_type_string                    = 3
  37     desc_type_interface                 = 4
  38     desc_type_endpoint                  = 5
  39     desc_type_device_qualifier          = 6
  40     desc_type_other_speed_configuration = 7
  41     desc_type_interface_power           = 8
  42     desc_type_hid                       = 33
  43     desc_type_report                    = 34
  44
  45     # while this holds for HID, it may not be a correct model for the USB
  46     # ecosystem at large
  47     if_class_to_desc_type = {
  48             3 : desc_type_hid
  49     }
  50
  51     def interface_class_to_descriptor_type(interface_class):
  52         return USB.if_class_to_desc_type[interface_class]
  53