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

/*
 * Touchright serial touchscreen driver
 *
 * Copyright (c) 2006 Rick Koch <n1gp@hotmail.com>
 *
 * Based on MicroTouch driver (drivers/input/touchscreen/mtouch.c)
 * Copyright (c) 2004 Vojtech Pavlik
 * and Dan Streetman <ddstreet@ieee.org>
 */

/*
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 as published
 * by the Free Software Foundation.
 */

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

#define DRIVER_DESC	"Touchright serial touchscreen driver"

MODULE_AUTHOR("Rick Koch <n1gp@hotmail.com>");
MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_LICENSE("GPL");

/*
 * Definitions & global arrays.
 */

#define TR_FORMAT_TOUCH_BIT	0x01
#define TR_FORMAT_STATUS_BYTE	0x40
#define TR_FORMAT_STATUS_MASK	~TR_FORMAT_TOUCH_BIT

#define TR_LENGTH 5

#define TR_MIN_XC 0
#define TR_MAX_XC 0x1ff
#define TR_MIN_YC 0
#define TR_MAX_YC 0x1ff

/*
 * Per-touchscreen data.
 */

struct tr {
	struct input_dev *dev;
	struct serio *serio;
	int idx;
	unsigned char data[TR_LENGTH];
	char phys[32];
};

static irqreturn_t tr_interrupt(struct serio *serio,
		unsigned char data, unsigned int flags)
{
	struct tr *tr = serio_get_drvdata(serio);
	struct input_dev *dev = tr->dev;

	tr->data[tr->idx] = data;

	if ((tr->data[0] & TR_FORMAT_STATUS_MASK) == TR_FORMAT_STATUS_BYTE) {
		if (++tr->idx == TR_LENGTH) {
			input_report_abs(dev, ABS_X,
				(tr->data[1] << 5) | (tr->data[2] >> 1));
			input_report_abs(dev, ABS_Y,
				(tr->data[3] << 5) | (tr->data[4] >> 1));
			input_report_key(dev, BTN_TOUCH,
				tr->data[0] & TR_FORMAT_TOUCH_BIT);
			input_sync(dev);
			tr->idx = 0;
		}
	}

	return IRQ_HANDLED;
}

/*
 * tr_disconnect() is the opposite of tr_connect()
 */

static void tr_disconnect(struct serio *serio)
{
	struct tr *tr = serio_get_drvdata(serio);

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

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

static int tr_connect(struct serio *serio, struct serio_driver *drv)
{
	struct tr *tr;
	struct input_dev *input_dev;
	int err;

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

	tr->serio = serio;
	tr->dev = input_dev;
	snprintf(tr->phys, sizeof(tr->phys), "%s/input0", serio->phys);

	input_dev->name = "Touchright Serial TouchScreen";
	input_dev->phys = tr->phys;
	input_dev->id.bustype = BUS_RS232;
	input_dev->id.vendor = SERIO_TOUCHRIGHT;
	input_dev->id.product = 0;
	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_set_abs_params(tr->dev, ABS_X, TR_MIN_XC, TR_MAX_XC, 0, 0);
	input_set_abs_params(tr->dev, ABS_Y, TR_MIN_YC, TR_MAX_YC, 0, 0);

	serio_set_drvdata(serio, tr);

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

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

	return 0;

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

/*
 * The serio driver structure.
 */

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

MODULE_DEVICE_TABLE(serio, tr_serio_ids);

static struct serio_driver tr_drv = {
	.driver		= {
		.name	= "touchright",
	},
	.description	= DRIVER_DESC,
	.id_table	= tr_serio_ids,
	.interrupt	= tr_interrupt,
	.connect	= tr_connect,
	.disconnect	= tr_disconnect,
};

module_serio_driver(tr_drv);
Commit	Line	Data
4003dff4 RK	1	/*
	2	* Touchright serial touchscreen driver
	3	*
	4	* Copyright (c) 2006 Rick Koch <n1gp@hotmail.com>
	5	*
	6	* Based on MicroTouch driver (drivers/input/touchscreen/mtouch.c)
	7	* Copyright (c) 2004 Vojtech Pavlik
	8	* and Dan Streetman <ddstreet@ieee.org>
	9	*/
	10
	11	/*
	12	* This program is free software; you can redistribute it and/or modify it
	13	* under the terms of the GNU General Public License version 2 as published
	14	* by the Free Software Foundation.
	15	*/
	16
	17	#include <linux/errno.h>
	18	#include <linux/kernel.h>
	19	#include <linux/module.h>
	20	#include <linux/slab.h>
	21	#include <linux/input.h>
	22	#include <linux/serio.h>
4003dff4 RK	23
	24	#define DRIVER_DESC "Touchright serial touchscreen driver"
	25
	26	MODULE_AUTHOR("Rick Koch <n1gp@hotmail.com>");
	27	MODULE_DESCRIPTION(DRIVER_DESC);
	28	MODULE_LICENSE("GPL");
	29
	30	/*
	31	* Definitions & global arrays.
	32	*/
	33
	34	#define TR_FORMAT_TOUCH_BIT 0x01
	35	#define TR_FORMAT_STATUS_BYTE 0x40
	36	#define TR_FORMAT_STATUS_MASK ~TR_FORMAT_TOUCH_BIT
	37
	38	#define TR_LENGTH 5
	39
	40	#define TR_MIN_XC 0
	41	#define TR_MAX_XC 0x1ff
	42	#define TR_MIN_YC 0
	43	#define TR_MAX_YC 0x1ff
	44
	45	/*
	46	* Per-touchscreen data.
	47	*/
	48
	49	struct tr {
	50	struct input_dev *dev;
	51	struct serio *serio;
	52	int idx;
	53	unsigned char data[TR_LENGTH];
	54	char phys[32];
	55	};
	56
	57	static irqreturn_t tr_interrupt(struct serio *serio,
7d12e780	58	unsigned char data, unsigned int flags)
4003dff4 RK	59	{
	60	struct tr *tr = serio_get_drvdata(serio);
	61	struct input_dev *dev = tr->dev;
	62
	63	tr->data[tr->idx] = data;
	64
	65	if ((tr->data[0] & TR_FORMAT_STATUS_MASK) == TR_FORMAT_STATUS_BYTE) {
	66	if (++tr->idx == TR_LENGTH) {
4003dff4 RK	67	input_report_abs(dev, ABS_X,
	68	(tr->data[1] << 5) \| (tr->data[2] >> 1));
	69	input_report_abs(dev, ABS_Y,
	70	(tr->data[3] << 5) \| (tr->data[4] >> 1));
	71	input_report_key(dev, BTN_TOUCH,
	72	tr->data[0] & TR_FORMAT_TOUCH_BIT);
	73	input_sync(dev);
	74	tr->idx = 0;
	75	}
	76	}
	77
	78	return IRQ_HANDLED;
	79	}
	80
	81	/*
	82	* tr_disconnect() is the opposite of tr_connect()
	83	*/
	84
	85	static void tr_disconnect(struct serio *serio)
	86	{
	87	struct tr *tr = serio_get_drvdata(serio);
	88
	89	input_get_device(tr->dev);
	90	input_unregister_device(tr->dev);
	91	serio_close(serio);
	92	serio_set_drvdata(serio, NULL);
	93	input_put_device(tr->dev);
	94	kfree(tr);
	95	}
	96
	97	/*
	98	* tr_connect() is the routine that is called when someone adds a
	99	* new serio device that supports the Touchright protocol and registers it as
	100	* an input device.
	101	*/
	102
	103	static int tr_connect(struct serio serio, struct serio_driver drv)
	104	{
	105	struct tr *tr;
	106	struct input_dev *input_dev;
	107	int err;
	108
	109	tr = kzalloc(sizeof(struct tr), GFP_KERNEL);
	110	input_dev = input_allocate_device();
	111	if (!tr \|\| !input_dev) {
	112	err = -ENOMEM;
	113	goto fail1;
	114	}
	115
	116	tr->serio = serio;
	117	tr->dev = input_dev;
	118	snprintf(tr->phys, sizeof(tr->phys), "%s/input0", serio->phys);
	119
4003dff4 RK	120	input_dev->name = "Touchright Serial TouchScreen";
	121	input_dev->phys = tr->phys;
	122	input_dev->id.bustype = BUS_RS232;
	123	input_dev->id.vendor = SERIO_TOUCHRIGHT;
	124	input_dev->id.product = 0;
	125	input_dev->id.version = 0x0100;
a5394fb0	126	input_dev->dev.parent = &serio->dev;
7b19ada2 JS	127	input_dev->evbit[0] = BIT_MASK(EV_KEY) \| BIT_MASK(EV_ABS);
7b19ada2 JS	128	input_dev->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH);
4003dff4 RK	129	input_set_abs_params(tr->dev, ABS_X, TR_MIN_XC, TR_MAX_XC, 0, 0);
	130	input_set_abs_params(tr->dev, ABS_Y, TR_MIN_YC, TR_MAX_YC, 0, 0);
	131
	132	serio_set_drvdata(serio, tr);
	133
	134	err = serio_open(serio, drv);
	135	if (err)
	136	goto fail2;
	137
	138	err = input_register_device(tr->dev);
	139	if (err)
	140	goto fail3;
	141
	142	return 0;
	143
	144	fail3: serio_close(serio);
	145	fail2: serio_set_drvdata(serio, NULL);
	146	fail1: input_free_device(input_dev);
	147	kfree(tr);
	148	return err;
	149	}
	150
	151	/*
	152	* The serio driver structure.
	153	*/
	154
	155	static struct serio_device_id tr_serio_ids[] = {
	156	{
	157	.type = SERIO_RS232,
	158	.proto = SERIO_TOUCHRIGHT,
	159	.id = SERIO_ANY,
	160	.extra = SERIO_ANY,
	161	},
	162	{ 0 }
	163	};
	164
	165	MODULE_DEVICE_TABLE(serio, tr_serio_ids);
	166
	167	static struct serio_driver tr_drv = {
	168	.driver = {
	169	.name = "touchright",
	170	},
	171	.description = DRIVER_DESC,
	172	.id_table = tr_serio_ids,
	173	.interrupt = tr_interrupt,
	174	.connect = tr_connect,
	175	.disconnect = tr_disconnect,
	176	};
	177
65ac9f7a	178	module_serio_driver(tr_drv);