bpf/progs/Huion__Dial-2.bpf.c

27 /* How this BPF program works: the tablet has two modes, firmware mode and
28  * tablet mode. In firmware mode (out of the box) the tablet sends button events
29  * and the dial as keyboard combinations. In tablet mode it uses a vendor specific
34  * To switch the tablet use e.g.  https://github.com/whot/huion-switcher
40  * If that property is not set we fix all hidraw nodes so the tablet works in
58  * This rdesc does nothing until the tablet is switched to raw mode, see
62  * Second hidraw node is the Pen. This one sends events until the tablet is
116  * the tablet is switched to raw mode, then it's mute:
221 			// Byte 1 in report - just exists so we get to be a tablet pad
228 			// Bytes 2/3 in report - just exists so we get to be a tablet pad
374 			Usage_Dig_BarrelSwitch	 // BTN_STYLUS, needed so we get to be a tablet pad
380 			// Bytes 2/3 - x/y just exist so we get to be a tablet pad
454 	/* Always fix the vendor mode so the tablet will work even if nothing sets  in SEC()
474 	/* Only sent if tablet is in default mode */  in SEC()
517 	/* Only sent if tablet is in default mode */  in SEC()
538 	/* Only sent if tablet is in raw mode */  in SEC()