[deliverable/linux.git] / drivers / input / touchscreen / wacom_w8001.c

/*
 * Wacom W8001 penabled serial touchscreen driver
 *
 * Copyright (c) 2008 Jaya Kumar
 * Copyright (c) 2010 Red Hat, Inc.
 *
 * This file is subject to the terms and conditions of the GNU General Public
 * License. See the file COPYING in the main directory of this archive for
 * more details.
 *
 * Layout based on Elo serial touchscreen driver by Vojtech Pavlik
 */

#include <linux/errno.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/input.h>
#include <linux/serio.h>
#include <linux/init.h>
#include <linux/ctype.h>

#define DRIVER_DESC	"Wacom W8001 serial touchscreen driver"

MODULE_AUTHOR("Jaya Kumar <jayakumar.lkml@gmail.com>");
MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_LICENSE("GPL");

#define W8001_MAX_LENGTH	11
#define W8001_LEAD_MASK		0x80
#define W8001_LEAD_BYTE		0x80
#define W8001_TAB_MASK		0x40
#define W8001_TAB_BYTE		0x40
/* set in first byte of touch data packets */
#define W8001_TOUCH_MASK	(0x10 | W8001_LEAD_MASK)
#define W8001_TOUCH_BYTE	(0x10 | W8001_LEAD_BYTE)

#define W8001_QUERY_PACKET	0x20

#define W8001_CMD_START		'1'
#define W8001_CMD_QUERY		'*'
#define W8001_CMD_TOUCHQUERY	'%'

/* length of data packets in bytes, depends on device. */
#define W8001_PKTLEN_TOUCH93	5
#define W8001_PKTLEN_TOUCH9A	7
#define W8001_PKTLEN_TPCPEN	9
#define W8001_PKTLEN_TPCCTL	11	/* control packet */
#define W8001_PKTLEN_TOUCH2FG	13

struct w8001_coord {
	u8 rdy;
	u8 tsw;
	u8 f1;
	u8 f2;
	u16 x;
	u16 y;
	u16 pen_pressure;
	u8 tilt_x;
	u8 tilt_y;
};

/* touch query reply packet */
struct w8001_touch_query {
	u8 panel_res;
	u8 capacity_res;
	u8 sensor_id;
	u16 x;
	u16 y;
};

/*
 * Per-touchscreen data.
 */

struct w8001 {
	struct input_dev *dev;
	struct serio *serio;
	struct completion cmd_done;
	int id;
	int idx;
	unsigned char response_type;
	unsigned char response[W8001_MAX_LENGTH];
	unsigned char data[W8001_MAX_LENGTH];
	char phys[32];
	int type;
	unsigned int pktlen;
};

static void parse_data(u8 *data, struct w8001_coord *coord)
{
	memset(coord, 0, sizeof(*coord));

	coord->rdy = data[0] & 0x20;
	coord->tsw = data[0] & 0x01;
	coord->f1 = data[0] & 0x02;
	coord->f2 = data[0] & 0x04;

	coord->x = (data[1] & 0x7F) << 9;
	coord->x |= (data[2] & 0x7F) << 2;
	coord->x |= (data[6] & 0x60) >> 5;

	coord->y = (data[3] & 0x7F) << 9;
	coord->y |= (data[4] & 0x7F) << 2;
	coord->y |= (data[6] & 0x18) >> 3;

	coord->pen_pressure = data[5] & 0x7F;
	coord->pen_pressure |= (data[6] & 0x07) << 7 ;

	coord->tilt_x = data[7] & 0x7F;
	coord->tilt_y = data[8] & 0x7F;
}

static void parse_touchquery(u8 *data, struct w8001_touch_query *query)
{
	memset(query, 0, sizeof(*query));

	query->panel_res = data[1];
	query->sensor_id = data[2] & 0x7;
	query->capacity_res = data[7];

	query->x = data[3] << 9;
	query->x |= data[4] << 2;
	query->x |= (data[2] >> 5) & 0x3;

	query->y = data[5] << 9;
	query->y |= data[6] << 2;
	query->y |= (data[2] >> 3) & 0x3;
}

static void report_pen_events(struct w8001 *w8001, struct w8001_coord *coord)
{
	struct input_dev *dev = w8001->dev;

	/*
	 * We have 1 bit for proximity (rdy) and 3 bits for tip, side,
	 * side2/eraser. If rdy && f2 are set, this can be either pen + side2,
	 * or eraser. assume
	 * - if dev is already in proximity and f2 is toggled → pen + side2
	 * - if dev comes into proximity with f2 set → eraser
	 * If f2 disappears after assuming eraser, fake proximity out for
	 * eraser and in for pen.
	 */

	if (!w8001->type) {
		w8001->type = coord->f2 ? BTN_TOOL_RUBBER : BTN_TOOL_PEN;
	} else if (w8001->type == BTN_TOOL_RUBBER) {
		if (!coord->f2) {
			input_report_abs(dev, ABS_PRESSURE, 0);
			input_report_key(dev, BTN_TOUCH, 0);
			input_report_key(dev, BTN_STYLUS, 0);
			input_report_key(dev, BTN_STYLUS2, 0);
			input_report_key(dev, BTN_TOOL_RUBBER, 0);
			input_sync(dev);
			w8001->type = BTN_TOOL_PEN;
		}
	} else {
		input_report_key(dev, BTN_STYLUS2, coord->f2);
	}

	input_report_abs(dev, ABS_X, coord->x);
	input_report_abs(dev, ABS_Y, coord->y);
	input_report_abs(dev, ABS_PRESSURE, coord->pen_pressure);
	input_report_key(dev, BTN_TOUCH, coord->tsw);
	input_report_key(dev, BTN_STYLUS, coord->f1);
	input_report_key(dev, w8001->type, coord->rdy);
	input_sync(dev);

	if (!coord->rdy)
		w8001->type = 0;
}

static irqreturn_t w8001_interrupt(struct serio *serio,
				   unsigned char data, unsigned int flags)
{
	struct w8001 *w8001 = serio_get_drvdata(serio);
	struct w8001_coord coord;
	unsigned char tmp;

	w8001->data[w8001->idx] = data;
	switch (w8001->idx++) {
	case 0:
		if ((data & W8001_LEAD_MASK) != W8001_LEAD_BYTE) {
			pr_debug("w8001: unsynchronized data: 0x%02x\n", data);
			w8001->idx = 0;
		}
		break;

	case W8001_PKTLEN_TOUCH93 - 1:
	case W8001_PKTLEN_TOUCH9A - 1:
		/* ignore one-finger touch packet. */
		if (w8001->pktlen == w8001->idx)
			w8001->idx = 0;
		break;

	/* Pen coordinates packet */
	case W8001_PKTLEN_TPCPEN - 1:
		tmp = w8001->data[0] & W8001_TAB_MASK;
		if (unlikely(tmp == W8001_TAB_BYTE))
			break;

		tmp = (w8001->data[0] & W8001_TOUCH_BYTE);
		if (tmp == W8001_TOUCH_BYTE)
			break;

		w8001->idx = 0;
		parse_data(w8001->data, &coord);
		report_pen_events(w8001, &coord);
		break;

	/* control packet */
	case W8001_PKTLEN_TPCCTL - 1:
		tmp = (w8001->data[0] & W8001_TOUCH_MASK);
		if (tmp == W8001_TOUCH_BYTE)
			break;

		w8001->idx = 0;
		memcpy(w8001->response, w8001->data, W8001_MAX_LENGTH);
		w8001->response_type = W8001_QUERY_PACKET;
		complete(&w8001->cmd_done);
		break;

	case W8001_PKTLEN_TOUCH2FG - 1:
		/* ignore two-finger touch packet. */
		if (w8001->pktlen == w8001->idx)
			w8001->idx = 0;
		break;
	}

	return IRQ_HANDLED;
}

static int w8001_command(struct w8001 *w8001, unsigned char command,
			 bool wait_response)
{
	int rc;

	w8001->response_type = 0;
	init_completion(&w8001->cmd_done);

	rc = serio_write(w8001->serio, command);
	if (rc == 0 && wait_response) {

		wait_for_completion_timeout(&w8001->cmd_done, HZ);
		if (w8001->response_type != W8001_QUERY_PACKET)
			rc = -EIO;
	}

	return rc;
}

static int w8001_setup(struct w8001 *w8001)
{
	struct input_dev *dev = w8001->dev;
	struct w8001_coord coord;
	int error;

	error = w8001_command(w8001, W8001_CMD_QUERY, true);
	if (error)
		return error;

	parse_data(w8001->response, &coord);

	input_set_abs_params(dev, ABS_X, 0, coord.x, 0, 0);
	input_set_abs_params(dev, ABS_Y, 0, coord.y, 0, 0);
	input_set_abs_params(dev, ABS_PRESSURE, 0, coord.pen_pressure, 0, 0);
	input_set_abs_params(dev, ABS_TILT_X, 0, coord.tilt_x, 0, 0);
	input_set_abs_params(dev, ABS_TILT_Y, 0, coord.tilt_y, 0, 0);

	error = w8001_command(w8001, W8001_CMD_TOUCHQUERY, true);
	if (!error) {
		struct w8001_touch_query touch;

		parse_touchquery(w8001->response, &touch);

		switch (touch.sensor_id) {
		case 0:
		case 2:
			w8001->pktlen = W8001_PKTLEN_TOUCH93;
			break;
		case 1:
		case 3:
		case 4:
			w8001->pktlen = W8001_PKTLEN_TOUCH9A;
			break;
		case 5:
			w8001->pktlen = W8001_PKTLEN_TOUCH2FG;
			break;
		}
	}

	return w8001_command(w8001, W8001_CMD_START, false);
}

/*
 * w8001_disconnect() is the opposite of w8001_connect()
 */

static void w8001_disconnect(struct serio *serio)
{
	struct w8001 *w8001 = serio_get_drvdata(serio);

	input_get_device(w8001->dev);
	input_unregister_device(w8001->dev);
	serio_close(serio);
	serio_set_drvdata(serio, NULL);
	input_put_device(w8001->dev);
	kfree(w8001);
}

/*
 * w8001_connect() is the routine that is called when someone adds a
 * new serio device that supports the w8001 protocol and registers it as
 * an input device.
 */

static int w8001_connect(struct serio *serio, struct serio_driver *drv)
{
	struct w8001 *w8001;
	struct input_dev *input_dev;
	int err;

	w8001 = kzalloc(sizeof(struct w8001), GFP_KERNEL);
	input_dev = input_allocate_device();
	if (!w8001 || !input_dev) {
		err = -ENOMEM;
		goto fail1;
	}

	w8001->serio = serio;
	w8001->id = serio->id.id;
	w8001->dev = input_dev;
	init_completion(&w8001->cmd_done);
	snprintf(w8001->phys, sizeof(w8001->phys), "%s/input0", serio->phys);

	input_dev->name = "Wacom W8001 Penabled Serial TouchScreen";
	input_dev->phys = w8001->phys;
	input_dev->id.bustype = BUS_RS232;
	input_dev->id.vendor = SERIO_W8001;
	input_dev->id.product = w8001->id;
	input_dev->id.version = 0x0100;
	input_dev->dev.parent = &serio->dev;

	input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
	input_dev->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH);
	input_dev->keybit[BIT_WORD(BTN_TOOL_PEN)] |= BIT_MASK(BTN_TOOL_PEN);
	input_dev->keybit[BIT_WORD(BTN_TOOL_RUBBER)] |= BIT_MASK(BTN_TOOL_RUBBER);
	input_dev->keybit[BIT_WORD(BTN_STYLUS)] |= BIT_MASK(BTN_STYLUS);
	input_dev->keybit[BIT_WORD(BTN_STYLUS2)] |= BIT_MASK(BTN_STYLUS2);

	serio_set_drvdata(serio, w8001);
	err = serio_open(serio, drv);
	if (err)
		goto fail2;

	err = w8001_setup(w8001);
	if (err)
		goto fail3;

	err = input_register_device(w8001->dev);
	if (err)
		goto fail3;

	return 0;

fail3:
	serio_close(serio);
fail2:
	serio_set_drvdata(serio, NULL);
fail1:
	input_free_device(input_dev);
	kfree(w8001);
	return err;
}

static struct serio_device_id w8001_serio_ids[] = {
	{
		.type	= SERIO_RS232,
		.proto	= SERIO_W8001,
		.id	= SERIO_ANY,
		.extra	= SERIO_ANY,
	},
	{ 0 }
};

MODULE_DEVICE_TABLE(serio, w8001_serio_ids);

static struct serio_driver w8001_drv = {
	.driver		= {
		.name	= "w8001",
	},
	.description	= DRIVER_DESC,
	.id_table	= w8001_serio_ids,
	.interrupt	= w8001_interrupt,
	.connect	= w8001_connect,
	.disconnect	= w8001_disconnect,
};

static int __init w8001_init(void)
{
	return serio_register_driver(&w8001_drv);
}

static void __exit w8001_exit(void)
{
	serio_unregister_driver(&w8001_drv);
}

module_init(w8001_init);
module_exit(w8001_exit);
Commit	Line	Data
3eb1aa43 JK	1	/*
	2	* Wacom W8001 penabled serial touchscreen driver
	3	*
	4	* Copyright (c) 2008 Jaya Kumar
aaba933e	5	* Copyright (c) 2010 Red Hat, Inc.
3eb1aa43 JK	6	*
	7	* This file is subject to the terms and conditions of the GNU General Public
	8	* License. See the file COPYING in the main directory of this archive for
	9	* more details.
	10	*
	11	* Layout based on Elo serial touchscreen driver by Vojtech Pavlik
	12	*/
	13
	14	#include <linux/errno.h>
	15	#include <linux/kernel.h>
	16	#include <linux/module.h>
	17	#include <linux/slab.h>
	18	#include <linux/input.h>
	19	#include <linux/serio.h>
	20	#include <linux/init.h>
	21	#include <linux/ctype.h>
	22
	23	#define DRIVER_DESC "Wacom W8001 serial touchscreen driver"
	24
	25	MODULE_AUTHOR("Jaya Kumar <jayakumar.lkml@gmail.com>");
	26	MODULE_DESCRIPTION(DRIVER_DESC);
	27	MODULE_LICENSE("GPL");
	28
3eb1aa43	29	#define W8001_MAX_LENGTH 11
41c372dc DT	30	#define W8001_LEAD_MASK 0x80
	31	#define W8001_LEAD_BYTE 0x80
	32	#define W8001_TAB_MASK 0x40
	33	#define W8001_TAB_BYTE 0x40
aaba933e PH	34	/* set in first byte of touch data packets */
	35	#define W8001_TOUCH_MASK (0x10 \| W8001_LEAD_MASK)
	36	#define W8001_TOUCH_BYTE (0x10 \| W8001_LEAD_BYTE)
3eb1aa43	37
41c372dc DT	38	#define W8001_QUERY_PACKET 0x20
	39
	40	#define W8001_CMD_START '1'
	41	#define W8001_CMD_QUERY '*'
aaba933e PH	42	#define W8001_CMD_TOUCHQUERY '%'
	43
	44	/* length of data packets in bytes, depends on device. */
	45	#define W8001_PKTLEN_TOUCH93 5
	46	#define W8001_PKTLEN_TOUCH9A 7
	47	#define W8001_PKTLEN_TPCPEN 9
	48	#define W8001_PKTLEN_TPCCTL 11 /* control packet */
	49	#define W8001_PKTLEN_TOUCH2FG 13
3eb1aa43 JK	50
	51	struct w8001_coord {
	52	u8 rdy;
	53	u8 tsw;
	54	u8 f1;
	55	u8 f2;
	56	u16 x;
	57	u16 y;
	58	u16 pen_pressure;
	59	u8 tilt_x;
	60	u8 tilt_y;
	61	};
	62
aaba933e PH	63	/* touch query reply packet */
	64	struct w8001_touch_query {
	65	u8 panel_res;
	66	u8 capacity_res;
	67	u8 sensor_id;
	68	u16 x;
	69	u16 y;
	70	};
	71
3eb1aa43 JK	72	/*
	73	* Per-touchscreen data.
	74	*/
	75
	76	struct w8001 {
	77	struct input_dev *dev;
	78	struct serio *serio;
3eb1aa43 JK	79	struct completion cmd_done;
	80	int id;
	81	int idx;
41c372dc DT	82	unsigned char response_type;
41c372dc DT	83	unsigned char response[W8001_MAX_LENGTH];
3eb1aa43	84	unsigned char data[W8001_MAX_LENGTH];
3eb1aa43	85	char phys[32];
2072f8db	86	int type;
aaba933e	87	unsigned int pktlen;
3eb1aa43 JK	88	};
3eb1aa43 JK	89
41c372dc	90	static void parse_data(u8 data, struct w8001_coord coord)
3eb1aa43	91	{
41c372dc DT	92	memset(coord, 0, sizeof(*coord));
41c372dc DT	93
3eb1aa43 JK	94	coord->rdy = data[0] & 0x20;
	95	coord->tsw = data[0] & 0x01;
	96	coord->f1 = data[0] & 0x02;
	97	coord->f2 = data[0] & 0x04;
	98
	99	coord->x = (data[1] & 0x7F) << 9;
	100	coord->x \|= (data[2] & 0x7F) << 2;
	101	coord->x \|= (data[6] & 0x60) >> 5;
	102
	103	coord->y = (data[3] & 0x7F) << 9;
	104	coord->y \|= (data[4] & 0x7F) << 2;
	105	coord->y \|= (data[6] & 0x18) >> 3;
	106
	107	coord->pen_pressure = data[5] & 0x7F;
	108	coord->pen_pressure \|= (data[6] & 0x07) << 7 ;
	109
	110	coord->tilt_x = data[7] & 0x7F;
	111	coord->tilt_y = data[8] & 0x7F;
3eb1aa43 JK	112	}
3eb1aa43 JK	113
aaba933e PH	114	static void parse_touchquery(u8 data, struct w8001_touch_query query)
	115	{
	116	memset(query, 0, sizeof(*query));
	117
	118	query->panel_res = data[1];
	119	query->sensor_id = data[2] & 0x7;
	120	query->capacity_res = data[7];
	121
	122	query->x = data[3] << 9;
	123	query->x \|= data[4] << 2;
	124	query->x \|= (data[2] >> 5) & 0x3;
	125
	126	query->y = data[5] << 9;
	127	query->y \|= data[6] << 2;
	128	query->y \|= (data[2] >> 3) & 0x3;
	129	}
	130
2072f8db PH	131	static void report_pen_events(struct w8001 w8001, struct w8001_coord coord)
	132	{
	133	struct input_dev *dev = w8001->dev;
	134
	135	/*
	136	* We have 1 bit for proximity (rdy) and 3 bits for tip, side,
	137	* side2/eraser. If rdy && f2 are set, this can be either pen + side2,
	138	* or eraser. assume
	139	* - if dev is already in proximity and f2 is toggled → pen + side2
	140	* - if dev comes into proximity with f2 set → eraser
	141	* If f2 disappears after assuming eraser, fake proximity out for
	142	* eraser and in for pen.
	143	*/
	144
	145	if (!w8001->type) {
	146	w8001->type = coord->f2 ? BTN_TOOL_RUBBER : BTN_TOOL_PEN;
	147	} else if (w8001->type == BTN_TOOL_RUBBER) {
	148	if (!coord->f2) {
	149	input_report_abs(dev, ABS_PRESSURE, 0);
	150	input_report_key(dev, BTN_TOUCH, 0);
	151	input_report_key(dev, BTN_STYLUS, 0);
	152	input_report_key(dev, BTN_STYLUS2, 0);
	153	input_report_key(dev, BTN_TOOL_RUBBER, 0);
	154	input_sync(dev);
	155	w8001->type = BTN_TOOL_PEN;
	156	}
	157	} else {
	158	input_report_key(dev, BTN_STYLUS2, coord->f2);
	159	}
	160
	161	input_report_abs(dev, ABS_X, coord->x);
	162	input_report_abs(dev, ABS_Y, coord->y);
	163	input_report_abs(dev, ABS_PRESSURE, coord->pen_pressure);
	164	input_report_key(dev, BTN_TOUCH, coord->tsw);
	165	input_report_key(dev, BTN_STYLUS, coord->f1);
	166	input_report_key(dev, w8001->type, coord->rdy);
	167	input_sync(dev);
	168
	169	if (!coord->rdy)
	170	w8001->type = 0;
	171	}
	172
41c372dc DT	173	static irqreturn_t w8001_interrupt(struct serio *serio,
41c372dc DT	174	unsigned char data, unsigned int flags)
3eb1aa43	175	{
41c372dc	176	struct w8001 *w8001 = serio_get_drvdata(serio);
3eb1aa43	177	struct w8001_coord coord;
41c372dc	178	unsigned char tmp;
3eb1aa43 JK	179
	180	w8001->data[w8001->idx] = data;
	181	switch (w8001->idx++) {
	182	case 0:
	183	if ((data & W8001_LEAD_MASK) != W8001_LEAD_BYTE) {
	184	pr_debug("w8001: unsynchronized data: 0x%02x\n", data);
	185	w8001->idx = 0;
	186	}
	187	break;
41c372dc	188
aaba933e PH	189	case W8001_PKTLEN_TOUCH93 - 1:
	190	case W8001_PKTLEN_TOUCH9A - 1:
	191	/* ignore one-finger touch packet. */
	192	if (w8001->pktlen == w8001->idx)
	193	w8001->idx = 0;
	194	break;
	195
	196	/* Pen coordinates packet */
	197	case W8001_PKTLEN_TPCPEN - 1:
3eb1aa43 JK	198	tmp = w8001->data[0] & W8001_TAB_MASK;
	199	if (unlikely(tmp == W8001_TAB_BYTE))
	200	break;
41c372dc	201
aaba933e PH	202	tmp = (w8001->data[0] & W8001_TOUCH_BYTE);
	203	if (tmp == W8001_TOUCH_BYTE)
	204	break;
	205
3eb1aa43	206	w8001->idx = 0;
3eb1aa43	207	parse_data(w8001->data, &coord);
2072f8db	208	report_pen_events(w8001, &coord);
3eb1aa43	209	break;
41c372dc	210
aaba933e PH	211	/* control packet */
	212	case W8001_PKTLEN_TPCCTL - 1:
	213	tmp = (w8001->data[0] & W8001_TOUCH_MASK);
	214	if (tmp == W8001_TOUCH_BYTE)
	215	break;
	216
3eb1aa43	217	w8001->idx = 0;
41c372dc DT	218	memcpy(w8001->response, w8001->data, W8001_MAX_LENGTH);
41c372dc DT	219	w8001->response_type = W8001_QUERY_PACKET;
3eb1aa43 JK	220	complete(&w8001->cmd_done);
3eb1aa43 JK	221	break;
aaba933e PH	222
	223	case W8001_PKTLEN_TOUCH2FG - 1:
	224	/* ignore two-finger touch packet. */
	225	if (w8001->pktlen == w8001->idx)
	226	w8001->idx = 0;
	227	break;
3eb1aa43	228	}
3eb1aa43 JK	229
	230	return IRQ_HANDLED;
	231	}
	232
41c372dc DT	233	static int w8001_command(struct w8001 *w8001, unsigned char command,
41c372dc DT	234	bool wait_response)
3eb1aa43	235	{
41c372dc	236	int rc;
3eb1aa43	237
41c372dc	238	w8001->response_type = 0;
3eb1aa43	239	init_completion(&w8001->cmd_done);
3eb1aa43	240
41c372dc DT	241	rc = serio_write(w8001->serio, command);
41c372dc DT	242	if (rc == 0 && wait_response) {
3eb1aa43	243
41c372dc DT	244	wait_for_completion_timeout(&w8001->cmd_done, HZ);
	245	if (w8001->response_type != W8001_QUERY_PACKET)
	246	rc = -EIO;
3eb1aa43 JK	247	}
3eb1aa43 JK	248
3eb1aa43 JK	249	return rc;
	250	}
	251
	252	static int w8001_setup(struct w8001 *w8001)
	253	{
3eb1aa43	254	struct input_dev *dev = w8001->dev;
41c372dc DT	255	struct w8001_coord coord;
41c372dc DT	256	int error;
3eb1aa43	257
41c372dc DT	258	error = w8001_command(w8001, W8001_CMD_QUERY, true);
	259	if (error)
	260	return error;
3eb1aa43	261
41c372dc	262	parse_data(w8001->response, &coord);
3eb1aa43 JK	263
	264	input_set_abs_params(dev, ABS_X, 0, coord.x, 0, 0);
	265	input_set_abs_params(dev, ABS_Y, 0, coord.y, 0, 0);
	266	input_set_abs_params(dev, ABS_PRESSURE, 0, coord.pen_pressure, 0, 0);
	267	input_set_abs_params(dev, ABS_TILT_X, 0, coord.tilt_x, 0, 0);
	268	input_set_abs_params(dev, ABS_TILT_Y, 0, coord.tilt_y, 0, 0);
	269
aaba933e PH	270	error = w8001_command(w8001, W8001_CMD_TOUCHQUERY, true);
	271	if (!error) {
	272	struct w8001_touch_query touch;
	273
	274	parse_touchquery(w8001->response, &touch);
	275
	276	switch (touch.sensor_id) {
	277	case 0:
	278	case 2:
	279	w8001->pktlen = W8001_PKTLEN_TOUCH93;
	280	break;
	281	case 1:
	282	case 3:
	283	case 4:
	284	w8001->pktlen = W8001_PKTLEN_TOUCH9A;
	285	break;
	286	case 5:
	287	w8001->pktlen = W8001_PKTLEN_TOUCH2FG;
	288	break;
	289	}
	290	}
	291
41c372dc	292	return w8001_command(w8001, W8001_CMD_START, false);
3eb1aa43 JK	293	}
	294
	295	/*
	296	* w8001_disconnect() is the opposite of w8001_connect()
	297	*/
	298
	299	static void w8001_disconnect(struct serio *serio)
	300	{
	301	struct w8001 *w8001 = serio_get_drvdata(serio);
	302
	303	input_get_device(w8001->dev);
	304	input_unregister_device(w8001->dev);
	305	serio_close(serio);
	306	serio_set_drvdata(serio, NULL);
	307	input_put_device(w8001->dev);
	308	kfree(w8001);
	309	}
	310
	311	/*
	312	* w8001_connect() is the routine that is called when someone adds a
	313	* new serio device that supports the w8001 protocol and registers it as
	314	* an input device.
	315	*/
	316
	317	static int w8001_connect(struct serio serio, struct serio_driver drv)
	318	{
	319	struct w8001 *w8001;
	320	struct input_dev *input_dev;
	321	int err;
	322
	323	w8001 = kzalloc(sizeof(struct w8001), GFP_KERNEL);
	324	input_dev = input_allocate_device();
	325	if (!w8001 \|\| !input_dev) {
	326	err = -ENOMEM;
	327	goto fail1;
	328	}
	329
	330	w8001->serio = serio;
	331	w8001->id = serio->id.id;
	332	w8001->dev = input_dev;
3eb1aa43 JK	333	init_completion(&w8001->cmd_done);
	334	snprintf(w8001->phys, sizeof(w8001->phys), "%s/input0", serio->phys);
	335
	336	input_dev->name = "Wacom W8001 Penabled Serial TouchScreen";
	337	input_dev->phys = w8001->phys;
	338	input_dev->id.bustype = BUS_RS232;
	339	input_dev->id.vendor = SERIO_W8001;
	340	input_dev->id.product = w8001->id;
	341	input_dev->id.version = 0x0100;
	342	input_dev->dev.parent = &serio->dev;
	343
	344	input_dev->evbit[0] = BIT_MASK(EV_KEY) \| BIT_MASK(EV_ABS);
	345	input_dev->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH);
2072f8db PH	346	input_dev->keybit[BIT_WORD(BTN_TOOL_PEN)] \|= BIT_MASK(BTN_TOOL_PEN);
	347	input_dev->keybit[BIT_WORD(BTN_TOOL_RUBBER)] \|= BIT_MASK(BTN_TOOL_RUBBER);
	348	input_dev->keybit[BIT_WORD(BTN_STYLUS)] \|= BIT_MASK(BTN_STYLUS);
	349	input_dev->keybit[BIT_WORD(BTN_STYLUS2)] \|= BIT_MASK(BTN_STYLUS2);
3eb1aa43 JK	350
	351	serio_set_drvdata(serio, w8001);
	352	err = serio_open(serio, drv);
	353	if (err)
	354	goto fail2;
	355
41c372dc DT	356	err = w8001_setup(w8001);
41c372dc DT	357	if (err)
3eb1aa43 JK	358	goto fail3;
	359
	360	err = input_register_device(w8001->dev);
	361	if (err)
	362	goto fail3;
	363
	364	return 0;
	365
	366	fail3:
	367	serio_close(serio);
	368	fail2:
	369	serio_set_drvdata(serio, NULL);
	370	fail1:
	371	input_free_device(input_dev);
	372	kfree(w8001);
	373	return err;
	374	}
	375
	376	static struct serio_device_id w8001_serio_ids[] = {
	377	{
	378	.type = SERIO_RS232,
	379	.proto = SERIO_W8001,
	380	.id = SERIO_ANY,
	381	.extra = SERIO_ANY,
	382	},
	383	{ 0 }
	384	};
	385
	386	MODULE_DEVICE_TABLE(serio, w8001_serio_ids);
	387
	388	static struct serio_driver w8001_drv = {
	389	.driver = {
	390	.name = "w8001",
	391	},
	392	.description = DRIVER_DESC,
	393	.id_table = w8001_serio_ids,
	394	.interrupt = w8001_interrupt,
	395	.connect = w8001_connect,
	396	.disconnect = w8001_disconnect,
	397	};
	398
	399	static int __init w8001_init(void)
	400	{
	401	return serio_register_driver(&w8001_drv);
	402	}
	403
	404	static void __exit w8001_exit(void)
	405	{
	406	serio_unregister_driver(&w8001_drv);
	407	}
	408
	409	module_init(w8001_init);
	410	module_exit(w8001_exit);