1 // SPDX-License-Identifier: GPL-2.0-only
21  * - the device reports Eraser instead of using Secondary Barrel Switch
22  * - when the eraser button is pressed and the stylus is touching the tablet,
30 	0xa1, 0x01,                    // Collection (Application)            4
38 …        //   Usage (Eraser)                    16  /* created over a padding bit at offset 29-33 */
42 	0x95, 0x05,                    //   Report Count (5)                  26  /* changed from 4 to 5 */
58 	0x55, 0x0d,                    //   Unit Exponent (-3)                61
72 	0x15, 0x81,                    //   Logical Minimum (-127)            93
78 	0x15, 0x81,                    //   Logical Minimum (-127)            105
98 	if (hctx->hid->product == PID_ARTIST_PRO14_GEN2) {  in SEC()
118 	/* xor bits 0,3 and 4: convert Tip Switch + Invert into Eraser only */  in xppen_16_fix_eraser()
130 …* >>> tip_height = 0.055677699 # the center of the pen coil distance from screen in inch (empirica…
136 /* 14" inch screen 11.874" x 7.421" */
148 	0, 4, 9, 13, 17, 21, 26, 30, 34, 38, 43, 47, 51, 55, 59, 64, 68, 72, 76, 80, 84,
158 /* 16" inch screen 13.567" x 8.480" */
170 	0, 4, 8, 11, 15, 19, 22, 26, 30, 34, 37, 41, 45, 48, 52, 56, 59, 63, 66, 70, 74,
189 	__u8 angle = tilt > 0 ? tilt : -tilt;  in compensate_coordinates_by_tilt()
197 		coords = (coords > compensation) ? coords - compensation : 0;  in compensate_coordinates_by_tilt()
200 		__u16 max = logical_maximum - compensation;  in compensate_coordinates_by_tilt()
232 	 * bytes 0   - report id  in xppen_16_fix_angle_offset()
233 	 *       1   - buttons  in xppen_16_fix_angle_offset()
234 	 *       2-3 - X coords (logical)  in xppen_16_fix_angle_offset()
235 	 *       4-5 - Y coords  in xppen_16_fix_angle_offset()
236 	 *       6-7 - pressure (ignore)  in xppen_16_fix_angle_offset()
237 	 *       8   - tilt X  in xppen_16_fix_angle_offset()
238 	 *       9   - tilt Y  in xppen_16_fix_angle_offset()
244 	if (hctx->hid->product == PID_ARTIST_PRO14_GEN2) {  in xppen_16_fix_angle_offset()
246 		compensate_coordinates_by_tilt(data, 4, tilt_y, &angle_offsets_vertical_14);  in xppen_16_fix_angle_offset()
247 	} else if (hctx->hid->product == PID_ARTIST_PRO16_GEN2) {  in xppen_16_fix_angle_offset()
249 		compensate_coordinates_by_tilt(data, 4, tilt_y, &angle_offsets_vertical_16);  in xppen_16_fix_angle_offset()
277 	ctx->retval = ctx->rdesc_size != 113;  in probe()
278 	if (ctx->retval)  in probe()
279 		ctx->retval = -EINVAL;  in probe()
282 	if (ctx->rdesc[17] != 0x45) /* Eraser */  in probe()
283 		ctx->retval = -EINVAL;  in probe()