2  * Wacom W8001 penabled serial touchscreen driver
6  * Copyright (c) 2010 - 2011 Ping Cheng, Wacom. <pingc@wacom.com>
12  * Layout based on Elo serial touchscreen driver by Vojtech Pavlik
24 #define DRIVER_DESC	"Wacom W8001 serial touchscreen driver"
55 /* resolution in points/mm */
64 	u16 x;  member
73 	u16 x;  member
81  * Per-touchscreen data.
111 	coord->rdy = data[0] & 0x20;  in parse_pen_data()
112 	coord->tsw = data[0] & 0x01;  in parse_pen_data()
113 	coord->f1 = data[0] & 0x02;  in parse_pen_data()
114 	coord->f2 = data[0] & 0x04;  in parse_pen_data()
116 	coord->x = (data[1] & 0x7F) << 9;  in parse_pen_data()
117 	coord->x |= (data[2] & 0x7F) << 2;  in parse_pen_data()
118 	coord->x |= (data[6] & 0x60) >> 5;  in parse_pen_data()
120 	coord->y = (data[3] & 0x7F) << 9;  in parse_pen_data()
121 	coord->y |= (data[4] & 0x7F) << 2;  in parse_pen_data()
122 	coord->y |= (data[6] & 0x18) >> 3;  in parse_pen_data()
124 	coord->pen_pressure = data[5] & 0x7F;  in parse_pen_data()
125 	coord->pen_pressure |= (data[6] & 0x07) << 7 ;  in parse_pen_data()
127 	coord->tilt_x = data[7] & 0x7F;  in parse_pen_data()
128 	coord->tilt_y = data[8] & 0x7F;  in parse_pen_data()
133 	coord->x = (data[1] << 7) | data[2];  in parse_single_touch()
134 	coord->y = (data[3] << 7) | data[4];  in parse_single_touch()
135 	coord->tsw = data[0] & 0x01;  in parse_single_touch()
139 				    unsigned int *x, unsigned int *y)  in scale_touch_coordinates()  argument
141 	if (w8001->max_pen_x && w8001->max_touch_x)  in scale_touch_coordinates()
142 		*x = *x * w8001->max_pen_x / w8001->max_touch_x;  in scale_touch_coordinates()
144 	if (w8001->max_pen_y && w8001->max_touch_y)  in scale_touch_coordinates()
145 		*y = *y * w8001->max_pen_y / w8001->max_touch_y;  in scale_touch_coordinates()
150 	struct input_dev *dev = w8001->touch_dev;  in parse_multi_touch()
151 	unsigned char *data = w8001->data;  in parse_multi_touch()
152 	unsigned int x, y;  in parse_multi_touch()  local
162 			x = (data[6 * i + 1] << 7) | data[6 * i + 2];  in parse_multi_touch()
167 			scale_touch_coordinates(w8001, &x, &y);  in parse_multi_touch()
169 			input_report_abs(dev, ABS_MT_POSITION_X, x);  in parse_multi_touch()
179 	if (w8001->type != BTN_TOOL_PEN &&  in parse_multi_touch()
180 			    w8001->type != BTN_TOOL_RUBBER) {  in parse_multi_touch()
181 		w8001->type = count == 1 ? BTN_TOOL_FINGER : KEY_RESERVED;  in parse_multi_touch()
192 	query->panel_res = data[1];  in parse_touchquery()
193 	query->sensor_id = data[2] & 0x7;  in parse_touchquery()
194 	query->capacity_res = data[7];  in parse_touchquery()
196 	query->x = data[3] << 9;  in parse_touchquery()
197 	query->x |= data[4] << 2;  in parse_touchquery()
198 	query->x |= (data[2] >> 5) & 0x3;  in parse_touchquery()
200 	query->y = data[5] << 9;  in parse_touchquery()
201 	query->y |= data[6] << 2;  in parse_touchquery()
202 	query->y |= (data[2] >> 3) & 0x3;  in parse_touchquery()
204 	/* Early days' single-finger touch models need the following defaults */  in parse_touchquery()
205 	if (!query->x && !query->y) {  in parse_touchquery()
206 		query->x = 1024;  in parse_touchquery()
207 		query->y = 1024;  in parse_touchquery()
208 		if (query->panel_res)  in parse_touchquery()
209 			query->x = query->y = (1 << query->panel_res);  in parse_touchquery()
210 		query->panel_res = W8001_TOUCH_RESOLUTION;  in parse_touchquery()
216 	struct input_dev *dev = w8001->pen_dev;  in report_pen_events()
222 	 * - if dev is already in proximity and f2 is toggled → pen + side2  in report_pen_events()
223 	 * - if dev comes into proximity with f2 set → eraser  in report_pen_events()
228 	switch (w8001->type) {  in report_pen_events()
230 		if (!coord->f2) {  in report_pen_events()
237 			w8001->type = BTN_TOOL_PEN;  in report_pen_events()
243 		w8001->type = coord->f2 ? BTN_TOOL_RUBBER : BTN_TOOL_PEN;  in report_pen_events()
247 		input_report_key(dev, BTN_STYLUS2, coord->f2);  in report_pen_events()
251 	input_report_abs(dev, ABS_X, coord->x);  in report_pen_events()
252 	input_report_abs(dev, ABS_Y, coord->y);  in report_pen_events()
253 	input_report_abs(dev, ABS_PRESSURE, coord->pen_pressure);  in report_pen_events()
254 	input_report_key(dev, BTN_TOUCH, coord->tsw);  in report_pen_events()
255 	input_report_key(dev, BTN_STYLUS, coord->f1);  in report_pen_events()
256 	input_report_key(dev, w8001->type, coord->rdy);  in report_pen_events()
259 	if (!coord->rdy)  in report_pen_events()
260 		w8001->type = KEY_RESERVED;  in report_pen_events()
265 	struct input_dev *dev = w8001->touch_dev;  in report_single_touch()
266 	unsigned int x = coord->x;  in report_single_touch()  local
267 	unsigned int y = coord->y;  in report_single_touch()
270 	scale_touch_coordinates(w8001, &x, &y);  in report_single_touch()
272 	input_report_abs(dev, ABS_X, x);  in report_single_touch()
274 	input_report_key(dev, BTN_TOUCH, coord->tsw);  in report_single_touch()
278 	w8001->type = coord->tsw ? BTN_TOOL_FINGER : KEY_RESERVED;  in report_single_touch()
288 	w8001->data[w8001->idx] = data;  in w8001_interrupt()
289 	switch (w8001->idx++) {  in w8001_interrupt()
292 			pr_debug("w8001: unsynchronized data: 0x%02x\n", data);  in w8001_interrupt()
293 			w8001->idx = 0;  in w8001_interrupt()
297 	case W8001_PKTLEN_TOUCH93 - 1:  in w8001_interrupt()
298 	case W8001_PKTLEN_TOUCH9A - 1:  in w8001_interrupt()
299 		tmp = w8001->data[0] & W8001_TOUCH_BYTE;  in w8001_interrupt()
303 		if (w8001->pktlen == w8001->idx) {  in w8001_interrupt()
304 			w8001->idx = 0;  in w8001_interrupt()
305 			if (w8001->type != BTN_TOOL_PEN &&  in w8001_interrupt()
306 			    w8001->type != BTN_TOOL_RUBBER) {  in w8001_interrupt()
307 				parse_single_touch(w8001->data, &coord);  in w8001_interrupt()
314 	case W8001_PKTLEN_TPCPEN - 1:  in w8001_interrupt()
315 		tmp = w8001->data[0] & W8001_TAB_MASK;  in w8001_interrupt()
319 		tmp = w8001->data[0] & W8001_TOUCH_BYTE;  in w8001_interrupt()
323 		w8001->idx = 0;  in w8001_interrupt()
324 		parse_pen_data(w8001->data, &coord);  in w8001_interrupt()
329 	case W8001_PKTLEN_TPCCTL - 1:  in w8001_interrupt()
330 		tmp = w8001->data[0] & W8001_TOUCH_MASK;  in w8001_interrupt()
334 		w8001->idx = 0;  in w8001_interrupt()
335 		memcpy(w8001->response, w8001->data, W8001_MAX_LENGTH);  in w8001_interrupt()
336 		w8001->response_type = W8001_QUERY_PACKET;  in w8001_interrupt()
337 		complete(&w8001->cmd_done);  in w8001_interrupt()
341 	case W8001_PKTLEN_TOUCH2FG - 1:  in w8001_interrupt()
342 		w8001->idx = 0;  in w8001_interrupt()
352 		if (!w8001->touch_dev && w8001->idx > W8001_PKTLEN_TPCPEN - 1)  in w8001_interrupt()
353 			w8001->idx = 0;  in w8001_interrupt()
364 	w8001->response_type = 0;  in w8001_command()
365 	init_completion(&w8001->cmd_done);  in w8001_command()
367 	rc = serio_write(w8001->serio, command);  in w8001_command()
370 		wait_for_completion_timeout(&w8001->cmd_done, HZ);  in w8001_command()
371 		if (w8001->response_type != W8001_QUERY_PACKET)  in w8001_command()
372 			rc = -EIO;  in w8001_command()
383 	err = mutex_lock_interruptible(&w8001->mutex);  in w8001_open()
387 	if (w8001->open_count++ == 0) {  in w8001_open()
390 			w8001->open_count--;  in w8001_open()
393 	mutex_unlock(&w8001->mutex);  in w8001_open()
401 	mutex_lock(&w8001->mutex);  in w8001_close()
403 	if (--w8001->open_count == 0)  in w8001_close()
406 	mutex_unlock(&w8001->mutex);  in w8001_close()
425 	struct input_dev *dev = w8001->pen_dev;  in w8001_setup_pen()
434 	__set_bit(EV_KEY, dev->evbit);  in w8001_setup_pen()
435 	__set_bit(EV_ABS, dev->evbit);  in w8001_setup_pen()
436 	__set_bit(BTN_TOUCH, dev->keybit);  in w8001_setup_pen()
437 	__set_bit(BTN_TOOL_PEN, dev->keybit);  in w8001_setup_pen()
438 	__set_bit(BTN_TOOL_RUBBER, dev->keybit);  in w8001_setup_pen()
439 	__set_bit(BTN_STYLUS, dev->keybit);  in w8001_setup_pen()
440 	__set_bit(BTN_STYLUS2, dev->keybit);  in w8001_setup_pen()
441 	__set_bit(INPUT_PROP_DIRECT, dev->propbit);  in w8001_setup_pen()
443 	parse_pen_data(w8001->response, &coord);  in w8001_setup_pen()
444 	w8001->max_pen_x = coord.x;  in w8001_setup_pen()
445 	w8001->max_pen_y = coord.y;  in w8001_setup_pen()
447 	input_set_abs_params(dev, ABS_X, 0, coord.x, 0, 0);  in w8001_setup_pen()
457 	w8001->id = 0x90;  in w8001_setup_pen()
466 	struct input_dev *dev = w8001->touch_dev;  in w8001_setup_touch()
476 	 * Some non-touch devices may reply to the touch query. But their  in w8001_setup_touch()
479 	if (!w8001->response[1])  in w8001_setup_touch()
480 		return -ENXIO;  in w8001_setup_touch()
482 	__set_bit(EV_KEY, dev->evbit);  in w8001_setup_touch()
483 	__set_bit(EV_ABS, dev->evbit);  in w8001_setup_touch()
484 	__set_bit(BTN_TOUCH, dev->keybit);  in w8001_setup_touch()
485 	__set_bit(INPUT_PROP_DIRECT, dev->propbit);  in w8001_setup_touch()
487 	parse_touchquery(w8001->response, &touch);  in w8001_setup_touch()
488 	w8001->max_touch_x = touch.x;  in w8001_setup_touch()
489 	w8001->max_touch_y = touch.y;  in w8001_setup_touch()
491 	if (w8001->max_pen_x && w8001->max_pen_y) {  in w8001_setup_touch()
493 		touch.x = w8001->max_pen_x;  in w8001_setup_touch()
494 		touch.y = w8001->max_pen_y;  in w8001_setup_touch()
498 	input_set_abs_params(dev, ABS_X, 0, touch.x, 0, 0);  in w8001_setup_touch()
506 		w8001->pktlen = W8001_PKTLEN_TOUCH93;  in w8001_setup_touch()
507 		w8001->id = 0x93;  in w8001_setup_touch()
514 		w8001->pktlen = W8001_PKTLEN_TOUCH9A;  in w8001_setup_touch()
516 		w8001->id = 0x9a;  in w8001_setup_touch()
520 		w8001->pktlen = W8001_PKTLEN_TOUCH2FG;  in w8001_setup_touch()
522 		__set_bit(BTN_TOOL_DOUBLETAP, dev->keybit);  in w8001_setup_touch()
525 			dev_err(&w8001->serio->dev,  in w8001_setup_touch()
531 					0, touch.x, 0, 0);  in w8001_setup_touch()
540 		if (w8001->max_pen_x && w8001->max_pen_y)  in w8001_setup_touch()
541 			w8001->id = 0xE3;  in w8001_setup_touch()
543 			w8001->id = 0xE2;  in w8001_setup_touch()
547 	strlcat(basename, " Touchscreen", basename_sz);  in w8001_setup_touch()
555 	dev->phys = w8001->phys;  in w8001_set_devdata()
556 	dev->id.bustype = BUS_RS232;  in w8001_set_devdata()
557 	dev->id.product = w8001->id;  in w8001_set_devdata()
558 	dev->id.vendor = 0x056a;  in w8001_set_devdata()
559 	dev->id.version = 0x0100;  in w8001_set_devdata()
560 	dev->open = w8001_open;  in w8001_set_devdata()
561 	dev->close = w8001_close;  in w8001_set_devdata()
563 	dev->dev.parent = &serio->dev;  in w8001_set_devdata()
578 	if (w8001->pen_dev)  in w8001_disconnect()
579 		input_unregister_device(w8001->pen_dev);  in w8001_disconnect()
580 	if (w8001->touch_dev)  in w8001_disconnect()
581 		input_unregister_device(w8001->touch_dev);  in w8001_disconnect()
605 		err = -ENOMEM;  in w8001_connect()
609 	w8001->serio = serio;  in w8001_connect()
610 	w8001->pen_dev = input_dev_pen;  in w8001_connect()
611 	w8001->touch_dev = input_dev_touch;  in w8001_connect()
612 	mutex_init(&w8001->mutex);  in w8001_connect()
613 	init_completion(&w8001->cmd_done);  in w8001_connect()
614 	snprintf(w8001->phys, sizeof(w8001->phys), "%s/input0", serio->phys);  in w8001_connect()
625 	/* For backwards-compatibility we compose the basename based on  in w8001_connect()
633 		err = -ENXIO;  in w8001_connect()
638 		strlcpy(w8001->pen_name, basename, sizeof(w8001->pen_name));  in w8001_connect()
639 		strlcat(w8001->pen_name, " Pen", sizeof(w8001->pen_name));  in w8001_connect()
640 		input_dev_pen->name = w8001->pen_name;  in w8001_connect()
644 		err = input_register_device(w8001->pen_dev);  in w8001_connect()
650 		w8001->pen_dev = NULL;  in w8001_connect()
654 		strlcpy(w8001->touch_name, basename, sizeof(w8001->touch_name));  in w8001_connect()
655 		strlcat(w8001->touch_name, " Finger",  in w8001_connect()
656 			sizeof(w8001->touch_name));  in w8001_connect()
657 		input_dev_touch->name = w8001->touch_name;  in w8001_connect()
661 		err = input_register_device(w8001->touch_dev);  in w8001_connect()
667 		w8001->touch_dev = NULL;  in w8001_connect()
673 	if (w8001->pen_dev)  in w8001_connect()
674 		input_unregister_device(w8001->pen_dev);  in w8001_connect()