[usb_gadget p00] Classes for encoding USB descriptors.

tools/usb_gadget/usb_const.py

Index: tools/usb_gadget/usb_const.py
diff --git a/tools/usb_gadget/usb_const.py b/tools/usb_gadget/usb_const.py
new file mode 100644
index 0000000000000000000000000000000000000000..9ec09b93cd9cbb31912bcee7a74427597e465602
--- /dev/null
+++ b/tools/usb_gadget/usb_const.py
@@ -0,0 +1,111 @@
+"""USB constant definitions.
+"""
+
+
+class DescriptorType(object):
+  DEVICE = 1
+  CONFIGURATION = 2
+  STRING = 3
+  INTERFACE = 4
+  ENDPOINT = 5
+  QUALIFIER = 6
+  OTHER_SPEED_CONFIGURATION = 7
+
+
+class DeviceClass(object):
+  """USB device classes."""
+  PER_INTERFACE = 0
+  AUDIO = 1
+  COMM = 2
+  HID = 3
+  PHYSICAL = 5
+  STILL_IMAGE = 6
+  PRINTER = 7
+  MASS_STORAGE = 8
+  HUB = 9
+  CDC_DATA = 10
+  CSCID = 11
+  CONTENT_SEC = 13
+  VIDEO = 14
+  VENDOR = 0xFF
+
+
+class DeviceSubClass(object):
+  PER_INTERFACE = 0
+  VENDOR = 0xFF
+
+
+class DeviceProtocol(object):
+  PER_INTERFACE = 0
+  VENDOR = 0xFF
+
+
+class InterfaceClass(object):
+  VENDOR = 0xFF
+
+
+class InterfaceSubClass(object):
+  VENDOR = 0xFF
+
+
+class InterfaceProtocol(object):
+  VENDOR = 0xFF
+
+
+class TransferType(object):
+  MASK = 3
+  CONTROL = 0
+  ISOCHRONOUS = 1
+  BULK = 2
+  INTERRUPT = 3
+
+
+class Dir(object):
+  OUT = 0
+  IN = 0x80
+
+
+class Type(object):
+  MASK = 0x60
+  STANDARD = 0x00
+  CLASS = 0x20
+  VENDOR = 0x40
+  RESERVED = 0x60
+
+
+class Recipient(object):
+  MASK = 0x1f
+  DEVICE = 0
+  INTERFACE = 1
+  ENDPOINT = 2
+  OTHER = 3
+
+
+class Request(object):
+  """Standard USB control request types."""
+  GET_STATUS = 0x00
+  CLEAR_FEATURE = 0x01
+  SET_FEATURE = 0x03
+  SET_ADDRESS = 0x05
+  GET_DESCRIPTOR = 0x06
+  SET_DESCRIPTOR = 0x07
+  GET_CONFIGURATION = 0x08
+  SET_CONFIGURATION = 0x09
+  GET_INTERFACE = 0x0A
+  SET_INTERFACE = 0x0B
+  SYNCH_FRAME = 0x0C
+  SET_SEL = 0x30
+  SET_ISOCH_DELAY = 0x31
+
+
+class Speed(object):
+  UNKNOWN = 0
+  LOW = 1
+  FULL = 2
+  HIGH = 3
+  WIRELESS = 4
+  SUPER = 5
+
+
+class VendorID(object):
+  GOOGLE = 0x18D1