<!-- SPDX-License-Identifier: GPL-3.0-or-later -->

# USB Descriptor for GuliKit KingKong 2 (Android mode)

Hex dump of the controller descriptor:
```
# xxd -c20 -g1 /sys/class/hidraw/hidraw18/device/report_descriptor

00000000: 05 01 09 05 a1 01 85 01 09 01 a1 00 09 30 09 31 15 00 27 ff  .............0.1..'.
00000014: ff 00 00 95 02 75 10 81 02 c0 09 01 a1 00 09 33 09 34 15 00  .....u.........3.4..
00000028: 27 ff ff 00 00 95 02 75 10 81 02 c0 05 01 09 32 15 00 26 ff  '......u.......2..&.
0000003c: 03 95 01 75 0a 81 02 15 00 25 00 75 06 95 01 81 03 05 01 09  ...u.....%.u........
00000050: 35 15 00 26 ff 03 95 01 75 0a 81 02 15 00 25 00 75 06 95 01  5..&....u.....%.u...
00000064: 81 03 05 01 09 39 15 01 25 08 35 00 46 3b 01 66 14 00 75 04  .....9..%.5.F;.f..u.
00000078: 95 01 81 42 75 04 95 01 15 00 25 00 35 00 45 00 65 00 81 03  ...Bu.....%.5.E.e...
0000008c: 05 09 19 01 29 0a 15 00 25 01 75 01 95 0a 81 02 15 00 25 00  ....)...%.u.......%.
000000a0: 75 06 95 01 81 03 05 01 09 80 85 02 a1 00 09 85 15 00 25 01  u.................%.
000000b4: 95 01 75 01 81 02 15 00 25 00 75 07 95 01 81 03 c0 05 0f 09  ..u.....%.u.........
000000c8: 21 85 03 a1 02 09 97 15 00 25 01 75 04 95 01 91 02 15 00 25  !........%.u.......%
000000dc: 00 75 04 95 01 91 03 09 70 15 00 25 64 75 08 95 04 91 02 09  .u......p..%du......
000000f0: 50 66 01 10 55 0e 15 00 26 ff 00 75 08 95 01 91 02 09 a7 15  Pf..U...&..u........
00000104: 00 26 ff 00 75 08 95 01 91 02 65 00 55 00 09 7c 15 00 26 ff  .&..u.....e.U..|..&.
00000118: 00 75 08 95 01 91 02 c0 85 04 05 06 09 20 15 00 26 ff 00 75  .u........... ..&..u
0000012c: 08 95 01 81 02 c0 00
```

Parsed descriptor:
(via https://eleccelerator.com/usbdescreqparser/)
```
0x05, 0x01,        // Usage Page (Generic Desktop Ctrls)
0x09, 0x05,        // Usage (Game Pad)
0xA1, 0x01,        // Collection (Application)
0x85, 0x01,        //   Report ID (1)
0x09, 0x01,        //   Usage (Pointer)
0xA1, 0x00,        //   Collection (Physical)
0x09, 0x30,        //     Usage (X)
0x09, 0x31,        //     Usage (Y)
0x15, 0x00,        //     Logical Minimum (0)
0x27, 0xFF, 0xFF, 0x00, 0x00,  //     Logical Maximum (65534)
0x95, 0x02,        //     Report Count (2)
0x75, 0x10,        //     Report Size (16)
0x81, 0x02,        //     Input (Data,Var,Abs,No Wrap,Linear,Preferred State,No Null Position)
0xC0,              //   End Collection
0x09, 0x01,        //   Usage (Pointer)
0xA1, 0x00,        //   Collection (Physical)
0x09, 0x33,        //     Usage (Rx)
0x09, 0x34,        //     Usage (Ry)
0x15, 0x00,        //     Logical Minimum (0)
0x27, 0xFF, 0xFF, 0x00, 0x00,  //     Logical Maximum (65534)
0x95, 0x02,        //     Report Count (2)
0x75, 0x10,        //     Report Size (16)
0x81, 0x02,        //     Input (Data,Var,Abs,No Wrap,Linear,Preferred State,No Null Position)
0xC0,              //   End Collection
0x05, 0x01,        //   Usage Page (Generic Desktop Ctrls)
0x09, 0x32,        //   Usage (Z)
0x15, 0x00,        //   Logical Minimum (0)
0x26, 0xFF, 0x03,  //   Logical Maximum (1023)
0x95, 0x01,        //   Report Count (1)
0x75, 0x0A,        //   Report Size (10)
0x81, 0x02,        //   Input (Data,Var,Abs,No Wrap,Linear,Preferred State,No Null Position)
0x15, 0x00,        //   Logical Minimum (0)
0x25, 0x00,        //   Logical Maximum (0)
0x75, 0x06,        //   Report Size (6)
0x95, 0x01,        //   Report Count (1)
0x81, 0x03,        //   Input (Const,Var,Abs,No Wrap,Linear,Preferred State,No Null Position)
0x05, 0x01,        //   Usage Page (Generic Desktop Ctrls)
0x09, 0x35,        //   Usage (Rz)
0x15, 0x00,        //   Logical Minimum (0)
0x26, 0xFF, 0x03,  //   Logical Maximum (1023)
0x95, 0x01,        //   Report Count (1)
0x75, 0x0A,        //   Report Size (10)
0x81, 0x02,        //   Input (Data,Var,Abs,No Wrap,Linear,Preferred State,No Null Position)
0x15, 0x00,        //   Logical Minimum (0)
0x25, 0x00,        //   Logical Maximum (0)
0x75, 0x06,        //   Report Size (6)
0x95, 0x01,        //   Report Count (1)
0x81, 0x03,        //   Input (Const,Var,Abs,No Wrap,Linear,Preferred State,No Null Position)
0x05, 0x01,        //   Usage Page (Generic Desktop Ctrls)
0x09, 0x39,        //   Usage (Hat switch)
0x15, 0x01,        //   Logical Minimum (1)
0x25, 0x08,        //   Logical Maximum (8)
0x35, 0x00,        //   Physical Minimum (0)
0x46, 0x3B, 0x01,  //   Physical Maximum (315)
0x66, 0x14, 0x00,  //   Unit (System: English Rotation, Length: Centimeter)
0x75, 0x04,        //   Report Size (4)
0x95, 0x01,        //   Report Count (1)
0x81, 0x42,        //   Input (Data,Var,Abs,No Wrap,Linear,Preferred State,Null State)
0x75, 0x04,        //   Report Size (4)
0x95, 0x01,        //   Report Count (1)
0x15, 0x00,        //   Logical Minimum (0)
0x25, 0x00,        //   Logical Maximum (0)
0x35, 0x00,        //   Physical Minimum (0)
0x45, 0x00,        //   Physical Maximum (0)
0x65, 0x00,        //   Unit (None)
0x81, 0x03,        //   Input (Const,Var,Abs,No Wrap,Linear,Preferred State,No Null Position)
0x05, 0x09,        //   Usage Page (Button)
0x19, 0x01,        //   Usage Minimum (0x01)
0x29, 0x0A,        //   Usage Maximum (0x0A)
0x15, 0x00,        //   Logical Minimum (0)
0x25, 0x01,        //   Logical Maximum (1)
0x75, 0x01,        //   Report Size (1)
0x95, 0x0A,        //   Report Count (10)
0x81, 0x02,        //   Input (Data,Var,Abs,No Wrap,Linear,Preferred State,No Null Position)
0x15, 0x00,        //   Logical Minimum (0)
0x25, 0x00,        //   Logical Maximum (0)
0x75, 0x06,        //   Report Size (6)
0x95, 0x01,        //   Report Count (1)
0x81, 0x03,        //   Input (Const,Var,Abs,No Wrap,Linear,Preferred State,No Null Position)
0x05, 0x01,        //   Usage Page (Generic Desktop Ctrls)
0x09, 0x80,        //   Usage (Sys Control)
0x85, 0x02,        //   Report ID (2)
0xA1, 0x00,        //   Collection (Physical)
0x09, 0x85,        //     Usage (Sys Main Menu)
0x15, 0x00,        //     Logical Minimum (0)
0x25, 0x01,        //     Logical Maximum (1)
0x95, 0x01,        //     Report Count (1)
0x75, 0x01,        //     Report Size (1)
0x81, 0x02,        //     Input (Data,Var,Abs,No Wrap,Linear,Preferred State,No Null Position)
0x15, 0x00,        //     Logical Minimum (0)
0x25, 0x00,        //     Logical Maximum (0)
0x75, 0x07,        //     Report Size (7)
0x95, 0x01,        //     Report Count (1)
0x81, 0x03,        //     Input (Const,Var,Abs,No Wrap,Linear,Preferred State,No Null Position)
0xC0,              //   End Collection
0x05, 0x0F,        //   Usage Page (PID Page)
0x09, 0x21,        //   Usage (0x21)
0x85, 0x03,        //   Report ID (3)
0xA1, 0x02,        //   Collection (Logical)
0x09, 0x97,        //     Usage (0x97)
0x15, 0x00,        //     Logical Minimum (0)
0x25, 0x01,        //     Logical Maximum (1)
0x75, 0x04,        //     Report Size (4)
0x95, 0x01,        //     Report Count (1)
0x91, 0x02,        //     Output (Data,Var,Abs,No Wrap,Linear,Preferred State,No Null Position,Non-volatile)
0x15, 0x00,        //     Logical Minimum (0)
0x25, 0x00,        //     Logical Maximum (0)
0x75, 0x04,        //     Report Size (4)
0x95, 0x01,        //     Report Count (1)
0x91, 0x03,        //     Output (Const,Var,Abs,No Wrap,Linear,Preferred State,No Null Position,Non-volatile)
0x09, 0x70,        //     Usage (0x70)
0x15, 0x00,        //     Logical Minimum (0)
0x25, 0x64,        //     Logical Maximum (100)
0x75, 0x08,        //     Report Size (8)
0x95, 0x04,        //     Report Count (4)
0x91, 0x02,        //     Output (Data,Var,Abs,No Wrap,Linear,Preferred State,No Null Position,Non-volatile)
0x09, 0x50,        //     Usage (0x50)
0x66, 0x01, 0x10,  //     Unit (System: SI Linear, Time: Seconds)
0x55, 0x0E,        //     Unit Exponent (-2)
0x15, 0x00,        //     Logical Minimum (0)
0x26, 0xFF, 0x00,  //     Logical Maximum (255)
0x75, 0x08,        //     Report Size (8)
0x95, 0x01,        //     Report Count (1)
0x91, 0x02,        //     Output (Data,Var,Abs,No Wrap,Linear,Preferred State,No Null Position,Non-volatile)
0x09, 0xA7,        //     Usage (0xA7)
0x15, 0x00,        //     Logical Minimum (0)
0x26, 0xFF, 0x00,  //     Logical Maximum (255)
0x75, 0x08,        //     Report Size (8)
0x95, 0x01,        //     Report Count (1)
0x91, 0x02,        //     Output (Data,Var,Abs,No Wrap,Linear,Preferred State,No Null Position,Non-volatile)
0x65, 0x00,        //     Unit (None)
0x55, 0x00,        //     Unit Exponent (0)
0x09, 0x7C,        //     Usage (0x7C)
0x15, 0x00,        //     Logical Minimum (0)
0x26, 0xFF, 0x00,  //     Logical Maximum (255)
0x75, 0x08,        //     Report Size (8)
0x95, 0x01,        //     Report Count (1)
0x91, 0x02,        //     Output (Data,Var,Abs,No Wrap,Linear,Preferred State,No Null Position,Non-volatile)
0xC0,              //   End Collection
0x85, 0x04,        //   Report ID (4)
0x05, 0x06,        //   Usage Page (Generic Dev Ctrls)
0x09, 0x20,        //   Usage (Battery Strength)
0x15, 0x00,        //   Logical Minimum (0)
0x26, 0xFF, 0x00,  //   Logical Maximum (255)
0x75, 0x08,        //   Report Size (8)
0x95, 0x01,        //   Report Count (1)
0x81, 0x02,        //   Input (Data,Var,Abs,No Wrap,Linear,Preferred State,No Null Position)
0xC0,              // End Collection
0x00,              // Unknown (bTag: 0x00, bType: 0x00)

// 307 bytes

// best guess: USB HID Report Descriptor
```
