1 // SPDX-License-Identifier: GPL-2.0-only
38  * Absolute coordinate packets are in the range 0-255 for both X and Y
53 /* Time in jiffies used to timeout various touch events (64 ms) */
59  * Swipe gesture from off-pad to on-pad
67  *  1 - 8 : least to most delay
114  *  1 - 7 : least to most sensitive
135  *  1 - 5 : slowest to fastest
147  *  0 - 7 : smallest to largest width
152  *  0 - 9 : smallest to largest height
157  *  1 - 6 : smallest to largest
162  *  0 - 7 : smallest to largest width
167  *  0 - 9 : smallest to largest height
179  *  1 - 9 : slowest to fastest
238 	struct byd_data *priv = psmouse->private;  in byd_report_input()
239 	struct input_dev *dev = psmouse->dev;  in byd_report_input()
241 	input_report_key(dev, BTN_TOUCH, priv->touch);  in byd_report_input()
242 	input_report_key(dev, BTN_TOOL_FINGER, priv->touch);  in byd_report_input()
244 	input_report_abs(dev, ABS_X, priv->abs_x);  in byd_report_input()
245 	input_report_abs(dev, ABS_Y, priv->abs_y);  in byd_report_input()
246 	input_report_key(dev, BTN_LEFT, priv->btn_left);  in byd_report_input()
247 	input_report_key(dev, BTN_RIGHT, priv->btn_right);  in byd_report_input()
255 	struct psmouse *psmouse = priv->psmouse;  in byd_clear_touch()
257 	guard(serio_pause_rx)(psmouse->ps2dev.serio);  in byd_clear_touch()
259 	priv->touch = false;  in byd_clear_touch()
264 	 * Move cursor back to center of pad when we lose touch - this  in byd_clear_touch()
268 	priv->abs_x = BYD_PAD_WIDTH / 2;  in byd_clear_touch()
269 	priv->abs_y = BYD_PAD_HEIGHT / 2;  in byd_clear_touch()
274 	struct byd_data *priv = psmouse->private;  in byd_process_byte()
275 	u8 *pkt = psmouse->packet;  in byd_process_byte()
277 	if (psmouse->pktcnt > 0 && !(pkt[0] & PS2_ALWAYS_1)) {  in byd_process_byte()
283 	if (psmouse->pktcnt < psmouse->pktsize)  in byd_process_byte()
290 		if (!priv->touch) {  in byd_process_byte()
293 				priv->last_touch_time + BYD_TOUCH_TIMEOUT;  in byd_process_byte()
294 			priv->touch = time_after(jiffies, tap_time);  in byd_process_byte()
297 			priv->abs_x = pkt[1] * (BYD_PAD_WIDTH / 256);  in byd_process_byte()
298 			priv->abs_y = (255 - pkt[2]) * (BYD_PAD_HEIGHT / 256);  in byd_process_byte()
303 		/* Sign-extend if a sign bit is set. */  in byd_process_byte()
310 		priv->abs_x += dx * BYD_DT;  in byd_process_byte()
311 		priv->abs_y -= dy * BYD_DT;  in byd_process_byte()
313 		priv->touch = true;  in byd_process_byte()
319 			     psmouse->packet[0], psmouse->packet[1],  in byd_process_byte()
320 			     psmouse->packet[2], psmouse->packet[3]);  in byd_process_byte()
324 	priv->btn_left = pkt[0] & PS2_LEFT;  in byd_process_byte()
325 	priv->btn_right = pkt[0] & PS2_RIGHT;  in byd_process_byte()
330 	if (priv->touch) {  in byd_process_byte()
331 		priv->last_touch_time = jiffies;  in byd_process_byte()
332 		mod_timer(&priv->timer, jiffies + BYD_TOUCH_TIMEOUT);  in byd_process_byte()
340 	struct ps2dev *ps2dev = &psmouse->ps2dev;  in byd_reset_touchpad()
349 		 * Intellimouse initialization sequence, to get 4-byte instead  in byd_reset_touchpad()
350 		 * of 3-byte packets.  in byd_reset_touchpad()
358 		 * BYD-specific initialization, which enables absolute mode and  in byd_reset_touchpad()
359 		 * (if desired), the touchpad's built-in gesture detection.  in byd_reset_touchpad()
363 		/* The touchpad should reply with 4 seemingly-random bytes */  in byd_reset_touchpad()
390 			return -EIO;  in byd_reset_touchpad()
425 	struct byd_data *priv = psmouse->private;  in byd_disconnect()
428 		del_timer(&priv->timer);  in byd_disconnect()
429 		kfree(psmouse->private);  in byd_disconnect()
430 		psmouse->private = NULL;  in byd_disconnect()
436 	struct ps2dev *ps2dev = &psmouse->ps2dev;  in byd_detect()
440 		return -1;  in byd_detect()
442 		return -1;  in byd_detect()
444 		return -1;  in byd_detect()
446 		return -1;  in byd_detect()
448 		return -1;  in byd_detect()
451 		return -ENODEV;  in byd_detect()
456 		psmouse->vendor = "BYD";  in byd_detect()
457 		psmouse->name = "TouchPad";  in byd_detect()
465 	struct input_dev *dev = psmouse->dev;  in byd_init()
469 		return -EIO;  in byd_init()
472 		return -EIO;  in byd_init()
476 		return -ENOMEM;  in byd_init()
478 	priv->psmouse = psmouse;  in byd_init()
479 	timer_setup(&priv->timer, byd_clear_touch, 0);  in byd_init()
481 	psmouse->private = priv;  in byd_init()
482 	psmouse->disconnect = byd_disconnect;  in byd_init()
483 	psmouse->reconnect = byd_reconnect;  in byd_init()
484 	psmouse->protocol_handler = byd_process_byte;  in byd_init()
485 	psmouse->pktsize = 4;  in byd_init()
486 	psmouse->resync_time = 0;  in byd_init()
488 	__set_bit(INPUT_PROP_POINTER, dev->propbit);  in byd_init()
490 	__set_bit(BTN_TOUCH, dev->keybit);  in byd_init()
491 	__set_bit(BTN_TOOL_FINGER, dev->keybit);  in byd_init()
493 	__set_bit(BTN_LEFT, dev->keybit);  in byd_init()
494 	__set_bit(BTN_RIGHT, dev->keybit);  in byd_init()
495 	__clear_bit(BTN_MIDDLE, dev->keybit);  in byd_init()
498 	__set_bit(EV_ABS, dev->evbit);  in byd_init()
504 	__clear_bit(EV_REL, dev->evbit);  in byd_init()
505 	__clear_bit(REL_X, dev->relbit);  in byd_init()
506 	__clear_bit(REL_Y, dev->relbit);  in byd_init()