bpf/progs/XPPen__ACK05.bpf.c

1 // SPDX-License-Identifier: GPL-2.0-only
35  *  0x05, 0x09,                    //     Usage Page (Button)                   12
43  *  0x95, 0x05,                    //     Report Count (5)                      28
81  * Each button gets assigned the following events:
84  *   Button 1:         06 01 12 00 00 00 00 00 -> LControl + o
85  *   Button 2:         06 01 11 00 00 00 00 00 -> LControl + n
86  *   Button 3:         06 00 3e 00 00 00 00 00 -> F5
87  *   Button 4:         06 02 00 00 00 00 00 00 -> LShift
88  *   Button 5:         06 01 00 00 00 00 00 00 -> LControl
89  *   Button 6:         06 04 00 00 00 00 00 00 -> LAlt
90  *   Button 7:         06 01 16 00 00 00 00 00 -> LControl + s
91  *   Button 8:         06 01 1d 00 00 00 00 00 -> LControl + z
92  *   Button 9:         06 00 2c 00 00 00 00 00 -> Space
93  *   Button 10:        06 03 1d 00 00 00 00 00 -> LControl + LShift + z
94  *   Wheel:            06 01 57 00 00 00 00 00 -> clockwise rotation (LControl + Keypad Plus)
95  *   Wheel:            06 01 56 00 00 00 00 00 -> counter-clockwise rotation
99  * each button gets assigned a new slot in the Input (Data,Arr,Abs):
101  *   Button 1 + 3:     06 01 12 3e 00 00 00 00 -> LControl + o + F5
103  * When a modifier is pressed (Button 4, 5, or 6), the assigned key is set to 00:
105  *   Button 5 + 7:     06 01 00 16 00 00 00 00 -> LControl + s
107  * This is mostly fine, but with Button 8 and Button 10 sharing the same
134 		// -- Byte 0 in report
136 		// Byte 1 in report - same than report ID
145 			// Byte 2-3 is the button state
157 			ReportCount(5) // padding
159 			// Byte 4 in report - just exists so we get to be a tablet pad
167 			// Bytes 5/6 in report - just exists so we get to be a tablet pad
176 			LogicalMinimum_i8(-1)
182 		// -- Byte 0 in report
184 		// Byte 1 in report - same than report ID
188 		// Byte 2 in report - always 0x01
198 			// Byte 3 in report - battery value
206 			// Byte 4 in report - charging state
221 	__s32 rdesc_size = hctx->size;  in SEC()
235 	hid_set_name(hctx->hid, "Disabled by HID-BPF Hanvon Ugee Shortcut Remote");  in SEC()
280 	/* button event */  in SEC()
288 		ret = 5;  in SEC()
302 	switch (ctx->rdesc_size) {  in probe()
307 		ctx->retval = 0;  in probe()
310 		ctx->retval = -EINVAL;  in probe()
314 	if (ctx->rdesc_size == VENDOR_DESCRIPTOR_LENGTH) {  in probe()
315 		struct hid_bpf_ctx *hctx = hid_bpf_allocate_context(ctx->hid);  in probe()
318 			ctx->retval = -EINVAL;  in probe()
322 		ctx->retval = HID_BPF_ASYNC_INIT(switch_to_raw_mode) ||  in probe()