[linux-2.6-block.git] / drivers / input / touchscreen / touchright.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 * 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>
 */


#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(*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 const 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
d2912cb1	1	// SPDX-License-Identifier: GPL-2.0-only
4003dff4 RK	2	/*
	3	* Touchright serial touchscreen driver
	4	*
	5	* Copyright (c) 2006 Rick Koch <n1gp@hotmail.com>
	6	*
	7	* Based on MicroTouch driver (drivers/input/touchscreen/mtouch.c)
	8	* Copyright (c) 2004 Vojtech Pavlik
	9	* and Dan Streetman <ddstreet@ieee.org>
	10	*/
	11
4003dff4 RK	12
	13	#include <linux/errno.h>
	14	#include <linux/kernel.h>
	15	#include <linux/module.h>
	16	#include <linux/slab.h>
	17	#include <linux/input.h>
	18	#include <linux/serio.h>
4003dff4 RK	19
	20	#define DRIVER_DESC "Touchright serial touchscreen driver"
	21
	22	MODULE_AUTHOR("Rick Koch <n1gp@hotmail.com>");
	23	MODULE_DESCRIPTION(DRIVER_DESC);
	24	MODULE_LICENSE("GPL");
	25
	26	/*
	27	* Definitions & global arrays.
	28	*/
	29
	30	#define TR_FORMAT_TOUCH_BIT 0x01
	31	#define TR_FORMAT_STATUS_BYTE 0x40
	32	#define TR_FORMAT_STATUS_MASK ~TR_FORMAT_TOUCH_BIT
	33
	34	#define TR_LENGTH 5
	35
	36	#define TR_MIN_XC 0
	37	#define TR_MAX_XC 0x1ff
	38	#define TR_MIN_YC 0
	39	#define TR_MAX_YC 0x1ff
	40
	41	/*
	42	* Per-touchscreen data.
	43	*/
	44
	45	struct tr {
	46	struct input_dev *dev;
	47	struct serio *serio;
	48	int idx;
	49	unsigned char data[TR_LENGTH];
	50	char phys[32];
	51	};
	52
	53	static irqreturn_t tr_interrupt(struct serio *serio,
7d12e780	54	unsigned char data, unsigned int flags)
4003dff4 RK	55	{
	56	struct tr *tr = serio_get_drvdata(serio);
	57	struct input_dev *dev = tr->dev;
	58
	59	tr->data[tr->idx] = data;
	60
	61	if ((tr->data[0] & TR_FORMAT_STATUS_MASK) == TR_FORMAT_STATUS_BYTE) {
	62	if (++tr->idx == TR_LENGTH) {
4003dff4 RK	63	input_report_abs(dev, ABS_X,
	64	(tr->data[1] << 5) \| (tr->data[2] >> 1));
	65	input_report_abs(dev, ABS_Y,
	66	(tr->data[3] << 5) \| (tr->data[4] >> 1));
	67	input_report_key(dev, BTN_TOUCH,
	68	tr->data[0] & TR_FORMAT_TOUCH_BIT);
	69	input_sync(dev);
	70	tr->idx = 0;
	71	}
	72	}
	73
	74	return IRQ_HANDLED;
	75	}
	76
	77	/*
	78	* tr_disconnect() is the opposite of tr_connect()
	79	*/
	80
	81	static void tr_disconnect(struct serio *serio)
	82	{
	83	struct tr *tr = serio_get_drvdata(serio);
	84
	85	input_get_device(tr->dev);
	86	input_unregister_device(tr->dev);
	87	serio_close(serio);
	88	serio_set_drvdata(serio, NULL);
	89	input_put_device(tr->dev);
	90	kfree(tr);
	91	}
	92
	93	/*
	94	* tr_connect() is the routine that is called when someone adds a
	95	* new serio device that supports the Touchright protocol and registers it as
	96	* an input device.
	97	*/
	98
	99	static int tr_connect(struct serio serio, struct serio_driver drv)
	100	{
	101	struct tr *tr;
	102	struct input_dev *input_dev;
	103	int err;
	104
f81d03d4	105	tr = kzalloc(sizeof(*tr), GFP_KERNEL);
4003dff4 RK	106	input_dev = input_allocate_device();
	107	if (!tr \|\| !input_dev) {
	108	err = -ENOMEM;
	109	goto fail1;
	110	}
	111
	112	tr->serio = serio;
	113	tr->dev = input_dev;
	114	snprintf(tr->phys, sizeof(tr->phys), "%s/input0", serio->phys);
	115
4003dff4 RK	116	input_dev->name = "Touchright Serial TouchScreen";
	117	input_dev->phys = tr->phys;
	118	input_dev->id.bustype = BUS_RS232;
	119	input_dev->id.vendor = SERIO_TOUCHRIGHT;
	120	input_dev->id.product = 0;
	121	input_dev->id.version = 0x0100;
a5394fb0	122	input_dev->dev.parent = &serio->dev;
7b19ada2 JS	123	input_dev->evbit[0] = BIT_MASK(EV_KEY) \| BIT_MASK(EV_ABS);
7b19ada2 JS	124	input_dev->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH);
4003dff4 RK	125	input_set_abs_params(tr->dev, ABS_X, TR_MIN_XC, TR_MAX_XC, 0, 0);
	126	input_set_abs_params(tr->dev, ABS_Y, TR_MIN_YC, TR_MAX_YC, 0, 0);
	127
	128	serio_set_drvdata(serio, tr);
	129
	130	err = serio_open(serio, drv);
	131	if (err)
	132	goto fail2;
	133
	134	err = input_register_device(tr->dev);
	135	if (err)
	136	goto fail3;
	137
	138	return 0;
	139
	140	fail3: serio_close(serio);
	141	fail2: serio_set_drvdata(serio, NULL);
	142	fail1: input_free_device(input_dev);
	143	kfree(tr);
	144	return err;
	145	}
	146
	147	/*
	148	* The serio driver structure.
	149	*/
	150
ef2bc04e	151	static const struct serio_device_id tr_serio_ids[] = {
4003dff4 RK	152	{
	153	.type = SERIO_RS232,
	154	.proto = SERIO_TOUCHRIGHT,
	155	.id = SERIO_ANY,
	156	.extra = SERIO_ANY,
	157	},
	158	{ 0 }
	159	};
	160
	161	MODULE_DEVICE_TABLE(serio, tr_serio_ids);
	162
	163	static struct serio_driver tr_drv = {
	164	.driver = {
	165	.name = "touchright",
	166	},
	167	.description = DRIVER_DESC,
	168	.id_table = tr_serio_ids,
	169	.interrupt = tr_interrupt,
	170	.connect = tr_connect,
	171	.disconnect = tr_disconnect,
	172	};
	173
65ac9f7a	174	module_serio_driver(tr_drv);