[mirror_ubuntu-bionic-kernel.git] / drivers / input / touchscreen / penmount.c

/*
 * Penmount serial touchscreen driver
 *
 * Copyright (c) 2006 Rick Koch <n1gp@hotmail.com>
 * Copyright (c) 2011 John Sung <penmount.touch@gmail.com>
 *
 * Based on ELO driver (drivers/input/touchscreen/elo.c)
 * Copyright (c) 2004 Vojtech Pavlik
 */

/*
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 as published
 * by the Free Software Foundation.
 */

#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	"PenMount serial touchscreen driver"

MODULE_AUTHOR("Rick Koch <n1gp@hotmail.com>");
MODULE_AUTHOR("John Sung <penmount.touch@gmail.com>");
MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_LICENSE("GPL");

/*
 * Definitions & global arrays.
 */

#define	PM_MAX_LENGTH	5

/*
 * Per-touchscreen data.
 */

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

static irqreturn_t pm_interrupt(struct serio *serio,
		unsigned char data, unsigned int flags)
{
	struct pm *pm = serio_get_drvdata(serio);
	struct input_dev *dev = pm->dev;

	pm->data[pm->idx] = data;

	if (pm->data[0] & 0x80) {
		if (PM_MAX_LENGTH == ++pm->idx) {
			input_report_abs(dev, ABS_X, pm->data[1] * 128 + pm->data[2]);
			input_report_abs(dev, ABS_Y, pm->data[3] * 128 + pm->data[4]);
			input_report_key(dev, BTN_TOUCH, !!(pm->data[0] & 0x40));
			input_sync(dev);
			pm->idx = 0;
		}
	}

	return IRQ_HANDLED;
}

/*
 * pm_disconnect() is the opposite of pm_connect()
 */

static void pm_disconnect(struct serio *serio)
{
	struct pm *pm = serio_get_drvdata(serio);

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

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

static int pm_connect(struct serio *serio, struct serio_driver *drv)
{
	struct pm *pm;
	struct input_dev *input_dev;
	int err;

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

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

	input_dev->name = "PenMount Serial TouchScreen";
	input_dev->phys = pm->phys;
	input_dev->id.bustype = BUS_RS232;
	input_dev->id.vendor = SERIO_PENMOUNT;
	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(pm->dev, ABS_X, 0, 0x3ff, 0, 0);
        input_set_abs_params(pm->dev, ABS_Y, 0, 0x3ff, 0, 0);

	serio_set_drvdata(serio, pm);

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

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

	return 0;

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

/*
 * The serio driver structure.
 */

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

MODULE_DEVICE_TABLE(serio, pm_serio_ids);

static struct serio_driver pm_drv = {
	.driver		= {
		.name	= "serio-penmount",
	},
	.description	= DRIVER_DESC,
	.id_table	= pm_serio_ids,
	.interrupt	= pm_interrupt,
	.connect	= pm_connect,
	.disconnect	= pm_disconnect,
};

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

static int __init pm_init(void)
{
	return serio_register_driver(&pm_drv);
}

static void __exit pm_exit(void)
{
	serio_unregister_driver(&pm_drv);
}

module_init(pm_init);
module_exit(pm_exit);
Commit	Line	Data
ee479999 RK	1	/*
	2	* Penmount serial touchscreen driver
	3	*
	4	* Copyright (c) 2006 Rick Koch <n1gp@hotmail.com>
21ae508b	5	* Copyright (c) 2011 John Sung <penmount.touch@gmail.com>
ee479999 RK	6	*
	7	* Based on ELO driver (drivers/input/touchscreen/elo.c)
	8	* Copyright (c) 2004 Vojtech Pavlik
	9	*/
	10
	11	/*
	12	* This program is free software; you can redistribute it and/or modify it
	13	* under the terms of the GNU General Public License version 2 as published
	14	* by the Free Software Foundation.
	15	*/
	16
	17	#include <linux/errno.h>
	18	#include <linux/kernel.h>
	19	#include <linux/module.h>
	20	#include <linux/slab.h>
	21	#include <linux/input.h>
	22	#include <linux/serio.h>
	23	#include <linux/init.h>
	24
21ae508b	25	#define DRIVER_DESC "PenMount serial touchscreen driver"
ee479999 RK	26
ee479999 RK	27	MODULE_AUTHOR("Rick Koch <n1gp@hotmail.com>");
21ae508b	28	MODULE_AUTHOR("John Sung <penmount.touch@gmail.com>");
ee479999 RK	29	MODULE_DESCRIPTION(DRIVER_DESC);
	30	MODULE_LICENSE("GPL");
	31
	32	/*
	33	* Definitions & global arrays.
	34	*/
	35
	36	#define PM_MAX_LENGTH 5
	37
	38	/*
	39	* Per-touchscreen data.
	40	*/
	41
	42	struct pm {
	43	struct input_dev *dev;
	44	struct serio *serio;
	45	int idx;
	46	unsigned char data[PM_MAX_LENGTH];
	47	char phys[32];
	48	};
	49
	50	static irqreturn_t pm_interrupt(struct serio *serio,
7d12e780	51	unsigned char data, unsigned int flags)
ee479999 RK	52	{
	53	struct pm *pm = serio_get_drvdata(serio);
	54	struct input_dev *dev = pm->dev;
	55
	56	pm->data[pm->idx] = data;
	57
	58	if (pm->data[0] & 0x80) {
	59	if (PM_MAX_LENGTH == ++pm->idx) {
21ae508b JS	60	input_report_abs(dev, ABS_X, pm->data[1] * 128 + pm->data[2]);
21ae508b JS	61	input_report_abs(dev, ABS_Y, pm->data[3] * 128 + pm->data[4]);
ee479999 RK	62	input_report_key(dev, BTN_TOUCH, !!(pm->data[0] & 0x40));
	63	input_sync(dev);
	64	pm->idx = 0;
	65	}
	66	}
	67
	68	return IRQ_HANDLED;
	69	}
	70
	71	/*
	72	* pm_disconnect() is the opposite of pm_connect()
	73	*/
	74
	75	static void pm_disconnect(struct serio *serio)
	76	{
	77	struct pm *pm = serio_get_drvdata(serio);
	78
	79	input_get_device(pm->dev);
	80	input_unregister_device(pm->dev);
	81	serio_close(serio);
	82	serio_set_drvdata(serio, NULL);
	83	input_put_device(pm->dev);
	84	kfree(pm);
	85	}
	86
	87	/*
	88	* pm_connect() is the routine that is called when someone adds a
21ae508b	89	* new serio device that supports PenMount protocol and registers it as
ee479999 RK	90	* an input device.
	91	*/
	92
	93	static int pm_connect(struct serio serio, struct serio_driver drv)
	94	{
	95	struct pm *pm;
	96	struct input_dev *input_dev;
	97	int err;
	98
	99	pm = kzalloc(sizeof(struct pm), GFP_KERNEL);
	100	input_dev = input_allocate_device();
	101	if (!pm \|\| !input_dev) {
	102	err = -ENOMEM;
	103	goto fail1;
	104	}
	105
	106	pm->serio = serio;
	107	pm->dev = input_dev;
	108	snprintf(pm->phys, sizeof(pm->phys), "%s/input0", serio->phys);
	109
21ae508b	110	input_dev->name = "PenMount Serial TouchScreen";
ee479999 RK	111	input_dev->phys = pm->phys;
	112	input_dev->id.bustype = BUS_RS232;
	113	input_dev->id.vendor = SERIO_PENMOUNT;
	114	input_dev->id.product = 0;
	115	input_dev->id.version = 0x0100;
a5394fb0	116	input_dev->dev.parent = &serio->dev;
ee479999	117
7b19ada2 JS	118	input_dev->evbit[0] = BIT_MASK(EV_KEY) \| BIT_MASK(EV_ABS);
7b19ada2 JS	119	input_dev->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH);
ee479999 RK	120	input_set_abs_params(pm->dev, ABS_X, 0, 0x3ff, 0, 0);
	121	input_set_abs_params(pm->dev, ABS_Y, 0, 0x3ff, 0, 0);
	122
	123	serio_set_drvdata(serio, pm);
	124
	125	err = serio_open(serio, drv);
	126	if (err)
	127	goto fail2;
	128
	129	err = input_register_device(pm->dev);
	130	if (err)
	131	goto fail3;
	132
	133	return 0;
	134
	135	fail3: serio_close(serio);
	136	fail2: serio_set_drvdata(serio, NULL);
	137	fail1: input_free_device(input_dev);
	138	kfree(pm);
	139	return err;
	140	}
	141
	142	/*
	143	* The serio driver structure.
	144	*/
	145
	146	static struct serio_device_id pm_serio_ids[] = {
	147	{
	148	.type = SERIO_RS232,
	149	.proto = SERIO_PENMOUNT,
	150	.id = SERIO_ANY,
	151	.extra = SERIO_ANY,
	152	},
	153	{ 0 }
	154	};
	155
	156	MODULE_DEVICE_TABLE(serio, pm_serio_ids);
	157
	158	static struct serio_driver pm_drv = {
	159	.driver = {
21ae508b	160	.name = "serio-penmount",
ee479999 RK	161	},
	162	.description = DRIVER_DESC,
	163	.id_table = pm_serio_ids,
	164	.interrupt = pm_interrupt,
	165	.connect = pm_connect,
	166	.disconnect = pm_disconnect,
	167	};
	168
	169	/*
	170	* The functions for inserting/removing us as a module.
	171	*/
	172
	173	static int __init pm_init(void)
	174	{
153a9df0	175	return serio_register_driver(&pm_drv);
ee479999 RK	176	}
	177
	178	static void __exit pm_exit(void)
	179	{
	180	serio_unregister_driver(&pm_drv);
	181	}
	182
	183	module_init(pm_init);
	184	module_exit(pm_exit);