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

/*
 * $Id: gunze.c,v 1.12 2001/09/25 10:12:07 vojtech Exp $
 *
 *  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>
#include <linux/init.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 pt_regs *regs)
{
	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_regs(dev, regs);
	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);
}

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

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

/*
 * 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);
}

/*
 * 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 fail;
	}

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

	input_dev->private = gunze;
	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->evbit[0] = BIT(EV_KEY) | BIT(EV_ABS);
	input_dev->keybit[LONG(BTN_TOUCH)] = BIT(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 fail;

	input_register_device(gunze->dev);
	return 0;

 fail:	serio_set_drvdata(serio, NULL);
	input_free_device(input_dev);
	kfree(gunze);
	return err;
}

/*
 * 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,
};

/*
 * The functions for inserting/removing us as a module.
 */

static int __init gunze_init(void)
{
	serio_register_driver(&gunze_drv);
	return 0;
}

static void __exit gunze_exit(void)
{
	serio_unregister_driver(&gunze_drv);
}

module_init(gunze_init);
module_exit(gunze_exit);
Commit	Line	Data
1da177e4 LT	1	/*
	2	* $Id: gunze.c,v 1.12 2001/09/25 10:12:07 vojtech Exp $
	3	*
	4	* Copyright (c) 2000-2001 Vojtech Pavlik
	5	*/
	6
	7	/*
	8	* Gunze AHL-51S touchscreen driver for Linux
	9	*/
	10
	11	/*
	12	* This program is free software; you can redistribute it and/or modify
	13	* it under the terms of the GNU General Public License as published by
	14	* the Free Software Foundation; either version 2 of the License, or
	15	* (at your option) any later version.
	16	*
	17	* This program is distributed in the hope that it will be useful,
	18	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	19	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	20	* GNU General Public License for more details.
	21	*
	22	* You should have received a copy of the GNU General Public License
	23	* along with this program; if not, write to the Free Software
	24	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
	25	*
	26	* Should you need to contact me, the author, you can do so either by
	27	* e-mail - mail your message to <vojtech@ucw.cz>, or by paper mail:
	28	* Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic
	29	*/
	30
	31	#include <linux/errno.h>
	32	#include <linux/kernel.h>
	33	#include <linux/module.h>
	34	#include <linux/slab.h>
	35	#include <linux/input.h>
	36	#include <linux/serio.h>
	37	#include <linux/init.h>
	38
	39	#define DRIVER_DESC "Gunze AHL-51S touchscreen driver"
	40
	41	MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
	42	MODULE_DESCRIPTION(DRIVER_DESC);
	43	MODULE_LICENSE("GPL");
	44
	45	/*
	46	* Definitions & global arrays.
	47	*/
	48
	49	#define GUNZE_MAX_LENGTH 10
	50
1da177e4 LT	51	/*
	52	* Per-touchscreen data.
	53	*/
	54
	55	struct gunze {
eca1ed19	56	struct input_dev *dev;
1da177e4 LT	57	struct serio *serio;
	58	int idx;
	59	unsigned char data[GUNZE_MAX_LENGTH];
	60	char phys[32];
	61	};
	62
	63	static void gunze_process_packet(struct gunze* gunze, struct pt_regs *regs)
	64	{
eca1ed19	65	struct input_dev *dev = gunze->dev;
1da177e4 LT	66
	67	if (gunze->idx != GUNZE_MAX_LENGTH \|\| gunze->data[5] != ',' \|\|
	68	(gunze->data[0] != 'T' && gunze->data[0] != 'R')) {
a07461ec	69	printk(KERN_WARNING "gunze.c: bad packet: >%.*s<\n", GUNZE_MAX_LENGTH, gunze->data);
1da177e4 LT	70	return;
	71	}
	72
	73	input_regs(dev, regs);
	74	input_report_abs(dev, ABS_X, simple_strtoul(gunze->data + 1, NULL, 10));
	75	input_report_abs(dev, ABS_Y, 1024 - simple_strtoul(gunze->data + 6, NULL, 10));
	76	input_report_key(dev, BTN_TOUCH, gunze->data[0] == 'T');
	77	input_sync(dev);
	78	}
	79
	80	static irqreturn_t gunze_interrupt(struct serio *serio,
	81	unsigned char data, unsigned int flags, struct pt_regs *regs)
	82	{
	83	struct gunze* gunze = serio_get_drvdata(serio);
	84
	85	if (data == '\r') {
	86	gunze_process_packet(gunze, regs);
	87	gunze->idx = 0;
	88	} else {
	89	if (gunze->idx < GUNZE_MAX_LENGTH)
	90	gunze->data[gunze->idx++] = data;
	91	}
	92	return IRQ_HANDLED;
	93	}
	94
	95	/*
	96	* gunze_disconnect() is the opposite of gunze_connect()
	97	*/
	98
	99	static void gunze_disconnect(struct serio *serio)
	100	{
eca1ed19	101	struct gunze *gunze = serio_get_drvdata(serio);
1da177e4	102
eca1ed19 DT	103	input_get_device(gunze->dev);
eca1ed19 DT	104	input_unregister_device(gunze->dev);
1da177e4 LT	105	serio_close(serio);
1da177e4 LT	106	serio_set_drvdata(serio, NULL);
eca1ed19	107	input_put_device(gunze->dev);
1da177e4 LT	108	kfree(gunze);
	109	}
	110
	111	/*
	112	* gunze_connect() is the routine that is called when someone adds a
	113	* new serio device that supports Gunze protocol and registers it as
	114	* an input device.
	115	*/
	116
	117	static int gunze_connect(struct serio serio, struct serio_driver drv)
	118	{
	119	struct gunze *gunze;
eca1ed19	120	struct input_dev *input_dev;
1da177e4 LT	121	int err;
1da177e4 LT	122
eca1ed19 DT	123	gunze = kzalloc(sizeof(struct gunze), GFP_KERNEL);
	124	input_dev = input_allocate_device();
	125	if (!gunze \|\| !input_dev) {
	126	err = -ENOMEM;
	127	goto fail;
	128	}
1da177e4 LT	129
1da177e4 LT	130	gunze->serio = serio;
eca1ed19	131	gunze->dev = input_dev;
a21466cc	132	snprintf(gunze->phys, sizeof(serio->phys), "%s/input0", serio->phys);
1da177e4	133
eca1ed19 DT	134	input_dev->private = gunze;
	135	input_dev->name = "Gunze AHL-51S TouchScreen";
	136	input_dev->phys = gunze->phys;
	137	input_dev->id.bustype = BUS_RS232;
	138	input_dev->id.vendor = SERIO_GUNZE;
	139	input_dev->id.product = 0x0051;
	140	input_dev->id.version = 0x0100;
	141	input_dev->evbit[0] = BIT(EV_KEY) \| BIT(EV_ABS);
	142	input_dev->keybit[LONG(BTN_TOUCH)] = BIT(BTN_TOUCH);
	143	input_set_abs_params(input_dev, ABS_X, 24, 1000, 0, 0);
	144	input_set_abs_params(input_dev, ABS_Y, 24, 1000, 0, 0);
1da177e4 LT	145
	146	serio_set_drvdata(serio, gunze);
	147
	148	err = serio_open(serio, drv);
eca1ed19 DT	149	if (err)
eca1ed19 DT	150	goto fail;
1da177e4	151
eca1ed19	152	input_register_device(gunze->dev);
1da177e4	153	return 0;
eca1ed19 DT	154
	155	fail: serio_set_drvdata(serio, NULL);
	156	input_free_device(input_dev);
	157	kfree(gunze);
	158	return err;
1da177e4 LT	159	}
	160
	161	/*
	162	* The serio driver structure.
	163	*/
	164
	165	static struct serio_device_id gunze_serio_ids[] = {
	166	{
	167	.type = SERIO_RS232,
	168	.proto = SERIO_GUNZE,
	169	.id = SERIO_ANY,
	170	.extra = SERIO_ANY,
	171	},
	172	{ 0 }
	173	};
	174
	175	MODULE_DEVICE_TABLE(serio, gunze_serio_ids);
	176
	177	static struct serio_driver gunze_drv = {
	178	.driver = {
	179	.name = "gunze",
	180	},
	181	.description = DRIVER_DESC,
	182	.id_table = gunze_serio_ids,
	183	.interrupt = gunze_interrupt,
	184	.connect = gunze_connect,
	185	.disconnect = gunze_disconnect,
	186	};
	187
	188	/*
	189	* The functions for inserting/removing us as a module.
	190	*/
	191
	192	static int __init gunze_init(void)
	193	{
	194	serio_register_driver(&gunze_drv);
	195	return 0;
	196	}
	197
	198	static void __exit gunze_exit(void)
	199	{
	200	serio_unregister_driver(&gunze_drv);
	201	}
	202
	203	module_init(gunze_init);
	204	module_exit(gunze_exit);