Release 4.11 drivers/input/touchscreen/gunze.c

/*
 *  Copyright (c) 2000-2001 Vojtech Pavlik
 */

/*
 * Gunze AHL-51S touchscreen driver for Linux
 */

/*
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 *
 * Should you need to contact me, the author, you can do so either by
 * e-mail - mail your message to <vojtech@ucw.cz>, or by paper mail:
 * Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic
 */

#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	"Gunze AHL-51S touchscreen driver"

MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");

MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_LICENSE("GPL");

/*
 * Definitions & global arrays.
 */


#define	GUNZE_MAX_LENGTH	10

/*
 * Per-touchscreen data.
 */


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



static void gunze_process_packet(struct gunze* gunze)
{
	struct input_dev *dev = gunze->dev;

	if (gunze->idx != GUNZE_MAX_LENGTH || gunze->data[5] != ',' ||
		(gunze->data[0] != 'T' && gunze->data[0] != 'R')) {
		printk(KERN_WARNING "gunze.c: bad packet: >%.*s<\n", GUNZE_MAX_LENGTH, gunze->data);
		return;
	}

	input_report_abs(dev, ABS_X, simple_strtoul(gunze->data + 1, NULL, 10));
	input_report_abs(dev, ABS_Y, 1024 - simple_strtoul(gunze->data + 6, NULL, 10));
	input_report_key(dev, BTN_TOUCH, gunze->data[0] == 'T');
	input_sync(dev);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Vojtech Pavlik
132
97.78%
3
75.00%
Dmitry Torokhov
3
2.22%
1
25.00%
Total
135
100.00%
4
100.00%



static irqreturn_t gunze_interrupt(struct serio *serio,
		unsigned char data, unsigned int flags)
{
	struct gunze* gunze = serio_get_drvdata(serio);

	if (data == '\r') {
		gunze_process_packet(gunze);
		gunze->idx = 0;
	} else {
		if (gunze->idx < GUNZE_MAX_LENGTH)
			gunze->data[gunze->idx++] = data;
	}
	return IRQ_HANDLED;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Vojtech Pavlik
67
90.54%
1
33.33%
Andrew Morton
4
5.41%
1
33.33%
Dmitry Torokhov
3
4.05%
1
33.33%
Total
74
100.00%
3
100.00%

/*
 * gunze_disconnect() is the opposite of gunze_connect()
 */



static void gunze_disconnect(struct serio *serio)
{
	struct gunze *gunze = serio_get_drvdata(serio);

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

Contributors
Person
Tokens
Prop
Commits
CommitProp
Vojtech Pavlik
35
59.32%
1
33.33%
Dmitry Torokhov
24
40.68%
2
66.67%
Total
59
100.00%
3
100.00%

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



static int gunze_connect(struct serio *serio, struct serio_driver *drv)
{
	struct gunze *gunze;
	struct input_dev *input_dev;
	int err;

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

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

	input_dev->name = "Gunze AHL-51S TouchScreen";
	input_dev->phys = gunze->phys;
	input_dev->id.bustype = BUS_RS232;
	input_dev->id.vendor = SERIO_GUNZE;
	input_dev->id.product = 0x0051;
	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(input_dev, ABS_X, 24, 1000, 0, 0);
	input_set_abs_params(input_dev, ABS_Y, 24, 1000, 0, 0);

	serio_set_drvdata(serio, gunze);

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

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

	return 0;

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

Contributors
Person
Tokens
Prop
Commits
CommitProp
Dmitry Torokhov
199
68.86%
8
66.67%
Vojtech Pavlik
86
29.76%
3
25.00%
Jiri Slaby
4
1.38%
1
8.33%
Total
289
100.00%
12
100.00%

/*
 * The serio driver structure.
 */


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

MODULE_DEVICE_TABLE(serio, gunze_serio_ids);


static struct serio_driver gunze_drv = {
	.driver		= {
		.name	= "gunze",
        },
	.description	= DRIVER_DESC,
	.id_table	= gunze_serio_ids,
	.interrupt	= gunze_interrupt,
	.connect	= gunze_connect,
	.disconnect	= gunze_disconnect,
};


module_serio_driver(gunze_drv);
Overall Contributors
Person
Tokens
Prop
Commits
CommitProp
Vojtech Pavlik
414
57.10%
5
25.00%
Dmitry Torokhov
300
41.38%
11
55.00%
Andrew Morton
4
0.55%
1
5.00%
Jiri Slaby
4
0.55%
1
5.00%
Axel Lin
2
0.28%
1
5.00%
Adrian Bunk
1
0.14%
1
5.00%
Total
725
100.00%
20
100.00%
Directory: drivers/input/touchscreen

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