[deliverable/linux.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>
#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 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 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>
	35	#include <linux/init.h>
	36
	37	#define DRIVER_DESC "Gunze AHL-51S touchscreen driver"
	38
	39	MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
	40	MODULE_DESCRIPTION(DRIVER_DESC);
	41	MODULE_LICENSE("GPL");
	42
	43	/*
	44	* Definitions & global arrays.
	45	*/
	46
	47	#define GUNZE_MAX_LENGTH 10
	48
1da177e4 LT	49	/*
	50	* Per-touchscreen data.
	51	*/
	52
	53	struct gunze {
eca1ed19	54	struct input_dev *dev;
1da177e4 LT	55	struct serio *serio;
	56	int idx;
	57	unsigned char data[GUNZE_MAX_LENGTH];
	58	char phys[32];
	59	};
	60
7d12e780	61	static void gunze_process_packet(struct gunze* gunze)
1da177e4	62	{
eca1ed19	63	struct input_dev *dev = gunze->dev;
1da177e4 LT	64
	65	if (gunze->idx != GUNZE_MAX_LENGTH \|\| gunze->data[5] != ',' \|\|
	66	(gunze->data[0] != 'T' && gunze->data[0] != 'R')) {
a07461ec	67	printk(KERN_WARNING "gunze.c: bad packet: >%.*s<\n", GUNZE_MAX_LENGTH, gunze->data);
1da177e4 LT	68	return;
	69	}
	70
1da177e4 LT	71	input_report_abs(dev, ABS_X, simple_strtoul(gunze->data + 1, NULL, 10));
	72	input_report_abs(dev, ABS_Y, 1024 - simple_strtoul(gunze->data + 6, NULL, 10));
	73	input_report_key(dev, BTN_TOUCH, gunze->data[0] == 'T');
	74	input_sync(dev);
	75	}
	76
	77	static irqreturn_t gunze_interrupt(struct serio *serio,
7d12e780	78	unsigned char data, unsigned int flags)
1da177e4 LT	79	{
	80	struct gunze* gunze = serio_get_drvdata(serio);
	81
	82	if (data == '\r') {
7d12e780	83	gunze_process_packet(gunze);
1da177e4 LT	84	gunze->idx = 0;
	85	} else {
	86	if (gunze->idx < GUNZE_MAX_LENGTH)
	87	gunze->data[gunze->idx++] = data;
	88	}
	89	return IRQ_HANDLED;
	90	}
	91
	92	/*
	93	* gunze_disconnect() is the opposite of gunze_connect()
	94	*/
	95
	96	static void gunze_disconnect(struct serio *serio)
	97	{
eca1ed19	98	struct gunze *gunze = serio_get_drvdata(serio);
1da177e4	99
eca1ed19 DT	100	input_get_device(gunze->dev);
eca1ed19 DT	101	input_unregister_device(gunze->dev);
1da177e4 LT	102	serio_close(serio);
1da177e4 LT	103	serio_set_drvdata(serio, NULL);
eca1ed19	104	input_put_device(gunze->dev);
1da177e4 LT	105	kfree(gunze);
	106	}
	107
	108	/*
	109	* gunze_connect() is the routine that is called when someone adds a
	110	* new serio device that supports Gunze protocol and registers it as
	111	* an input device.
	112	*/
	113
	114	static int gunze_connect(struct serio serio, struct serio_driver drv)
	115	{
	116	struct gunze *gunze;
eca1ed19	117	struct input_dev *input_dev;
1da177e4 LT	118	int err;
1da177e4 LT	119
eca1ed19 DT	120	gunze = kzalloc(sizeof(struct gunze), GFP_KERNEL);
	121	input_dev = input_allocate_device();
	122	if (!gunze \|\| !input_dev) {
	123	err = -ENOMEM;
52c1f570	124	goto fail1;
eca1ed19	125	}
1da177e4 LT	126
1da177e4 LT	127	gunze->serio = serio;
eca1ed19	128	gunze->dev = input_dev;
a21466cc	129	snprintf(gunze->phys, sizeof(serio->phys), "%s/input0", serio->phys);
1da177e4	130
eca1ed19 DT	131	input_dev->name = "Gunze AHL-51S TouchScreen";
	132	input_dev->phys = gunze->phys;
	133	input_dev->id.bustype = BUS_RS232;
	134	input_dev->id.vendor = SERIO_GUNZE;
	135	input_dev->id.product = 0x0051;
	136	input_dev->id.version = 0x0100;
a5394fb0	137	input_dev->dev.parent = &serio->dev;
7b19ada2 JS	138	input_dev->evbit[0] = BIT_MASK(EV_KEY) \| BIT_MASK(EV_ABS);
7b19ada2 JS	139	input_dev->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH);
eca1ed19 DT	140	input_set_abs_params(input_dev, ABS_X, 24, 1000, 0, 0);
eca1ed19 DT	141	input_set_abs_params(input_dev, ABS_Y, 24, 1000, 0, 0);
1da177e4 LT	142
	143	serio_set_drvdata(serio, gunze);
	144
	145	err = serio_open(serio, drv);
eca1ed19	146	if (err)
52c1f570 DT	147	goto fail2;
	148
	149	err = input_register_device(gunze->dev);
	150	if (err)
	151	goto fail3;
1da177e4 LT	152
1da177e4 LT	153	return 0;
eca1ed19	154
52c1f570 DT	155	fail3: serio_close(serio);
	156	fail2: serio_set_drvdata(serio, NULL);
	157	fail1: input_free_device(input_dev);
eca1ed19 DT	158	kfree(gunze);
eca1ed19 DT	159	return err;
1da177e4 LT	160	}
	161
	162	/*
	163	* The serio driver structure.
	164	*/
	165
	166	static struct serio_device_id gunze_serio_ids[] = {
	167	{
	168	.type = SERIO_RS232,
	169	.proto = SERIO_GUNZE,
	170	.id = SERIO_ANY,
	171	.extra = SERIO_ANY,
	172	},
	173	{ 0 }
	174	};
	175
	176	MODULE_DEVICE_TABLE(serio, gunze_serio_ids);
	177
	178	static struct serio_driver gunze_drv = {
	179	.driver = {
	180	.name = "gunze",
	181	},
	182	.description = DRIVER_DESC,
	183	.id_table = gunze_serio_ids,
	184	.interrupt = gunze_interrupt,
	185	.connect = gunze_connect,
	186	.disconnect = gunze_disconnect,
	187	};
	188
65ac9f7a	189	module_serio_driver(gunze_drv);