[linux-2.6-block.git] / 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);
}

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;
}

/*
 * 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 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;
}

/*
 * The serio driver structure.
 */

static const 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);
Commit	Line	Data
1da177e4	1	/*
1da177e4 LT	2	* Copyright (c) 2000-2001 Vojtech Pavlik
	3	*/
	4
	5	/*
	6	* Gunze AHL-51S touchscreen driver for Linux
	7	*/
	8
	9	/*
	10	* This program is free software; you can redistribute it and/or modify
	11	* it under the terms of the GNU General Public License as published by
	12	* the Free Software Foundation; either version 2 of the License, or
	13	* (at your option) any later version.
	14	*
	15	* This program is distributed in the hope that it will be useful,
	16	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	17	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	18	* GNU General Public License for more details.
	19	*
	20	* You should have received a copy of the GNU General Public License
	21	* along with this program; if not, write to the Free Software
	22	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
	23	*
	24	* Should you need to contact me, the author, you can do so either by
	25	* e-mail - mail your message to <vojtech@ucw.cz>, or by paper mail:
	26	* Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic
	27	*/
	28
	29	#include <linux/errno.h>
	30	#include <linux/kernel.h>
	31	#include <linux/module.h>
	32	#include <linux/slab.h>
	33	#include <linux/input.h>
	34	#include <linux/serio.h>
1da177e4 LT	35
	36	#define DRIVER_DESC "Gunze AHL-51S touchscreen driver"
	37
	38	MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
	39	MODULE_DESCRIPTION(DRIVER_DESC);
	40	MODULE_LICENSE("GPL");
	41
	42	/*
	43	* Definitions & global arrays.
	44	*/
	45
	46	#define GUNZE_MAX_LENGTH 10
	47
1da177e4 LT	48	/*
	49	* Per-touchscreen data.
	50	*/
	51
	52	struct gunze {
eca1ed19	53	struct input_dev *dev;
1da177e4 LT	54	struct serio *serio;
	55	int idx;
	56	unsigned char data[GUNZE_MAX_LENGTH];
	57	char phys[32];
	58	};
	59
7d12e780	60	static void gunze_process_packet(struct gunze* gunze)
1da177e4	61	{
eca1ed19	62	struct input_dev *dev = gunze->dev;
1da177e4 LT	63
	64	if (gunze->idx != GUNZE_MAX_LENGTH \|\| gunze->data[5] != ',' \|\|
	65	(gunze->data[0] != 'T' && gunze->data[0] != 'R')) {
a07461ec	66	printk(KERN_WARNING "gunze.c: bad packet: >%.*s<\n", GUNZE_MAX_LENGTH, gunze->data);
1da177e4 LT	67	return;
	68	}
	69
1da177e4 LT	70	input_report_abs(dev, ABS_X, simple_strtoul(gunze->data + 1, NULL, 10));
	71	input_report_abs(dev, ABS_Y, 1024 - simple_strtoul(gunze->data + 6, NULL, 10));
	72	input_report_key(dev, BTN_TOUCH, gunze->data[0] == 'T');
	73	input_sync(dev);
	74	}
	75
	76	static irqreturn_t gunze_interrupt(struct serio *serio,
7d12e780	77	unsigned char data, unsigned int flags)
1da177e4 LT	78	{
	79	struct gunze* gunze = serio_get_drvdata(serio);
	80
	81	if (data == '\r') {
7d12e780	82	gunze_process_packet(gunze);
1da177e4 LT	83	gunze->idx = 0;
	84	} else {
	85	if (gunze->idx < GUNZE_MAX_LENGTH)
	86	gunze->data[gunze->idx++] = data;
	87	}
	88	return IRQ_HANDLED;
	89	}
	90
	91	/*
	92	* gunze_disconnect() is the opposite of gunze_connect()
	93	*/
	94
	95	static void gunze_disconnect(struct serio *serio)
	96	{
eca1ed19	97	struct gunze *gunze = serio_get_drvdata(serio);
1da177e4	98
eca1ed19 DT	99	input_get_device(gunze->dev);
eca1ed19 DT	100	input_unregister_device(gunze->dev);
1da177e4 LT	101	serio_close(serio);
1da177e4 LT	102	serio_set_drvdata(serio, NULL);
eca1ed19	103	input_put_device(gunze->dev);
1da177e4 LT	104	kfree(gunze);
	105	}
	106
	107	/*
	108	* gunze_connect() is the routine that is called when someone adds a
	109	* new serio device that supports Gunze protocol and registers it as
	110	* an input device.
	111	*/
	112
	113	static int gunze_connect(struct serio serio, struct serio_driver drv)
	114	{
	115	struct gunze *gunze;
eca1ed19	116	struct input_dev *input_dev;
1da177e4 LT	117	int err;
1da177e4 LT	118
eca1ed19 DT	119	gunze = kzalloc(sizeof(struct gunze), GFP_KERNEL);
	120	input_dev = input_allocate_device();
	121	if (!gunze \|\| !input_dev) {
	122	err = -ENOMEM;
52c1f570	123	goto fail1;
eca1ed19	124	}
1da177e4 LT	125
1da177e4 LT	126	gunze->serio = serio;
eca1ed19	127	gunze->dev = input_dev;
a21466cc	128	snprintf(gunze->phys, sizeof(serio->phys), "%s/input0", serio->phys);
1da177e4	129
eca1ed19 DT	130	input_dev->name = "Gunze AHL-51S TouchScreen";
	131	input_dev->phys = gunze->phys;
	132	input_dev->id.bustype = BUS_RS232;
	133	input_dev->id.vendor = SERIO_GUNZE;
	134	input_dev->id.product = 0x0051;
	135	input_dev->id.version = 0x0100;
a5394fb0	136	input_dev->dev.parent = &serio->dev;
7b19ada2 JS	137	input_dev->evbit[0] = BIT_MASK(EV_KEY) \| BIT_MASK(EV_ABS);
7b19ada2 JS	138	input_dev->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH);
eca1ed19 DT	139	input_set_abs_params(input_dev, ABS_X, 24, 1000, 0, 0);
eca1ed19 DT	140	input_set_abs_params(input_dev, ABS_Y, 24, 1000, 0, 0);
1da177e4 LT	141
	142	serio_set_drvdata(serio, gunze);
	143
	144	err = serio_open(serio, drv);
eca1ed19	145	if (err)
52c1f570 DT	146	goto fail2;
	147
	148	err = input_register_device(gunze->dev);
	149	if (err)
	150	goto fail3;
1da177e4 LT	151
1da177e4 LT	152	return 0;
eca1ed19	153
52c1f570 DT	154	fail3: serio_close(serio);
	155	fail2: serio_set_drvdata(serio, NULL);
	156	fail1: input_free_device(input_dev);
eca1ed19 DT	157	kfree(gunze);
eca1ed19 DT	158	return err;
1da177e4 LT	159	}
	160
	161	/*
	162	* The serio driver structure.
	163	*/
	164
73300904	165	static const struct serio_device_id gunze_serio_ids[] = {
1da177e4 LT	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
65ac9f7a	188	module_serio_driver(gunze_drv);