Thanks!
This sure is a weird HID report descriptor. Doesn't look like any game controller I've ever seen. Just a bunch of 8-bit items. Nothing obvious about what any of it means.
0x05, 0x05, // Usage Page (Game Ctrls)
0x09, 0x00, // Usage (Undefined)
0xA1, 0x01, // Collection (Application)
0x85, 0x11, // Report ID (17)
0x19, 0x00, // Usage Minimum (Undefined)
0x2A, 0xFF, 0x00, // Usage Maximum (0xFF)
0x15, 0x00, // Logical Minimum (0)
0x26, 0xFF, 0x00, // Logical Maximum (255)
0x75, 0x08, // Report Size (8)
0x95, 0x05, // Report Count (5)
0x91, 0x00, // Output (Data,Array,Abs,No Wrap,Linear,Preferred State,No Null Position,Non-volatile)
0xC0, // End Collection
0xA1, 0x01, // Collection (Application)
0x85, 0x21, // Report ID (33)
0x19, 0x00, // Usage Minimum (Undefined)
0x2A, 0xFF, 0x00, // Usage Maximum (0xFF)
0x15, 0x00, // Logical Minimum (0)
0x26, 0xFF, 0x00, // Logical Maximum (255)
0x75, 0x08, // Report Size (8)
0x95, 0x25, // Report Count (37)
0x81, 0x00, // Input (Data,Array,Abs,No Wrap,Linear,Preferred State,No Null Position)
0xC0, // End Collection
0xA1, 0x01, // Collection (Application)
0x85, 0x12, // Report ID (18)
0x19, 0x00, // Usage Minimum (Undefined)
0x2A, 0xFF, 0x00, // Usage Maximum (0xFF)
0x15, 0x00, // Logical Minimum (0)
0x26, 0xFF, 0x00, // Logical Maximum (255)
0x75, 0x08, // Report Size (8)
0x95, 0x01, // Report Count (1)
0x91, 0x00, // Output (Data,Array,Abs,No Wrap,Linear,Preferred State,No Null Position,Non-volatile)
0xC0, // End Collection
0xA1, 0x01, // Collection (Application)
0x85, 0x22, // Report ID (34)
0x19, 0x00, // Usage Minimum (Undefined)
0x2A, 0xFF, 0x00, // Usage Maximum (0xFF)
0x15, 0x00, // Logical Minimum (0)
0x26, 0xFF, 0x00, // Logical Maximum (255)
0x75, 0x08, // Report Size (8)
0x95, 0x19, // Report Count (25)
0x81, 0x00, // Input (Data,Array,Abs,No Wrap,Linear,Preferred State,No Null Position)
0xC0, // End Collection
0xA1, 0x01, // Collection (Application)
0x85, 0x13, // Report ID (19)
0x19, 0x00, // Usage Minimum (Undefined)
0x2A, 0xFF, 0x00, // Usage Maximum (0xFF)
0x15, 0x00, // Logical Minimum (0)
0x26, 0xFF, 0x00, // Logical Maximum (255)
0x75, 0x08, // Report Size (8)
0x95, 0x01, // Report Count (1)
0x91, 0x00, // Output (Data,Array,Abs,No Wrap,Linear,Preferred State,No Null Position,Non-volatile)
0xC0, // End Collection
0xA1, 0x01, // Collection (Application)
0x85, 0x23, // Report ID (35)
0x19, 0x00, // Usage Minimum (Undefined)
0x2A, 0xFF, 0x00, // Usage Maximum (0xFF)
0x15, 0x00, // Logical Minimum (0)
0x26, 0xFF, 0x00, // Logical Maximum (255)
0x75, 0x08, // Report Size (8)
0x95, 0x02, // Report Count (2)
0x81, 0x00, // Input (Data,Array,Abs,No Wrap,Linear,Preferred State,No Null Position)
0xC0, // End Collection
0xA1, 0x01, // Collection (Application)
0x85, 0x14, // Report ID (20)
0x19, 0x00, // Usage Minimum (Undefined)
0x2A, 0xFF, 0x00, // Usage Maximum (0xFF)
0x15, 0x00, // Logical Minimum (0)
0x26, 0xFF, 0x00, // Logical Maximum (255)
0x75, 0x08, // Report Size (8)
0x95, 0x01, // Report Count (1)
0x91, 0x00, // Output (Data,Array,Abs,No Wrap,Linear,Preferred State,No Null Position,Non-volatile)
0xC0, // End Collection
0xA1, 0x01, // Collection (Application)
0x85, 0x24, // Report ID (36)
0x19, 0x00, // Usage Minimum (Undefined)
0x2A, 0xFF, 0x00, // Usage Maximum (0xFF)
0x15, 0x00, // Logical Minimum (0)
0x26, 0xFF, 0x00, // Logical Maximum (255)
0x75, 0x08, // Report Size (8)
0x95, 0x02, // Report Count (2)
0x81, 0x00, // Input (Data,Array,Abs,No Wrap,Linear,Preferred State,No Null Position)
0xC0, // End Collection
0xA1, 0x01, // Collection (Application)
0x85, 0x15, // Report ID (21)
0x19, 0x00, // Usage Minimum (Undefined)
0x2A, 0xFF, 0x00, // Usage Maximum (0xFF)
0x15, 0x00, // Logical Minimum (0)
0x26, 0xFF, 0x00, // Logical Maximum (255)
0x75, 0x08, // Report Size (8)
0x95, 0x01, // Report Count (1)
0x91, 0x00, // Output (Data,Array,Abs,No Wrap,Linear,Preferred State,No Null Position,Non-volatile)
0xC0, // End Collection
0xA1, 0x01, // Collection (Application)
0x85, 0x25, // Report ID (37)
0x19, 0x00, // Usage Minimum (Undefined)
0x2A, 0xFF, 0x00, // Usage Maximum (0xFF)
0x15, 0x00, // Logical Minimum (0)
0x26, 0xFF, 0x00, // Logical Maximum (255)
0x75, 0x08, // Report Size (8)
0x95, 0x02, // Report Count (2)
0x81, 0x00, // Input (Data,Array,Abs,No Wrap,Linear,Preferred State,No Null Position)
0xC0, // End Collection
// 214 bytes