[mirror_ubuntu-jammy-kernel.git] / drivers / input / touchscreen / gunze.c

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 *  Copyright (c) 2000-2001 Vojtech Pavlik
 */

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

/*
 */

#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
1a59d1b8	1	// SPDX-License-Identifier: GPL-2.0-or-later
1da177e4	2	/*
1da177e4 LT	3	* Copyright (c) 2000-2001 Vojtech Pavlik
	4	*/
	5
	6	/*
	7	* Gunze AHL-51S touchscreen driver for Linux
	8	*/
	9
	10	/*
1da177e4 LT	11	*/
	12
	13	#include <linux/errno.h>
	14	#include <linux/kernel.h>
	15	#include <linux/module.h>
	16	#include <linux/slab.h>
	17	#include <linux/input.h>
	18	#include <linux/serio.h>
1da177e4 LT	19
	20	#define DRIVER_DESC "Gunze AHL-51S touchscreen driver"
	21
	22	MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
	23	MODULE_DESCRIPTION(DRIVER_DESC);
	24	MODULE_LICENSE("GPL");
	25
	26	/*
	27	* Definitions & global arrays.
	28	*/
	29
	30	#define GUNZE_MAX_LENGTH 10
	31
1da177e4 LT	32	/*
	33	* Per-touchscreen data.
	34	*/
	35
	36	struct gunze {
eca1ed19	37	struct input_dev *dev;
1da177e4 LT	38	struct serio *serio;
	39	int idx;
	40	unsigned char data[GUNZE_MAX_LENGTH];
	41	char phys[32];
	42	};
	43
249d1bb2	44	static void gunze_process_packet(struct gunze *gunze)
1da177e4	45	{
eca1ed19	46	struct input_dev *dev = gunze->dev;
1da177e4 LT	47
	48	if (gunze->idx != GUNZE_MAX_LENGTH \|\| gunze->data[5] != ',' \|\|
	49	(gunze->data[0] != 'T' && gunze->data[0] != 'R')) {
a07461ec	50	printk(KERN_WARNING "gunze.c: bad packet: >%.*s<\n", GUNZE_MAX_LENGTH, gunze->data);
1da177e4 LT	51	return;
	52	}
	53
1da177e4 LT	54	input_report_abs(dev, ABS_X, simple_strtoul(gunze->data + 1, NULL, 10));
	55	input_report_abs(dev, ABS_Y, 1024 - simple_strtoul(gunze->data + 6, NULL, 10));
	56	input_report_key(dev, BTN_TOUCH, gunze->data[0] == 'T');
	57	input_sync(dev);
	58	}
	59
	60	static irqreturn_t gunze_interrupt(struct serio *serio,
7d12e780	61	unsigned char data, unsigned int flags)
1da177e4	62	{
249d1bb2	63	struct gunze *gunze = serio_get_drvdata(serio);
1da177e4 LT	64
1da177e4 LT	65	if (data == '\r') {
7d12e780	66	gunze_process_packet(gunze);
1da177e4 LT	67	gunze->idx = 0;
	68	} else {
	69	if (gunze->idx < GUNZE_MAX_LENGTH)
	70	gunze->data[gunze->idx++] = data;
	71	}
	72	return IRQ_HANDLED;
	73	}
	74
	75	/*
	76	* gunze_disconnect() is the opposite of gunze_connect()
	77	*/
	78
	79	static void gunze_disconnect(struct serio *serio)
	80	{
eca1ed19	81	struct gunze *gunze = serio_get_drvdata(serio);
1da177e4	82
eca1ed19 DT	83	input_get_device(gunze->dev);
eca1ed19 DT	84	input_unregister_device(gunze->dev);
1da177e4 LT	85	serio_close(serio);
1da177e4 LT	86	serio_set_drvdata(serio, NULL);
eca1ed19	87	input_put_device(gunze->dev);
1da177e4 LT	88	kfree(gunze);
	89	}
	90
	91	/*
	92	* gunze_connect() is the routine that is called when someone adds a
	93	* new serio device that supports Gunze protocol and registers it as
	94	* an input device.
	95	*/
	96
	97	static int gunze_connect(struct serio serio, struct serio_driver drv)
	98	{
	99	struct gunze *gunze;
eca1ed19	100	struct input_dev *input_dev;
1da177e4 LT	101	int err;
1da177e4 LT	102
eca1ed19 DT	103	gunze = kzalloc(sizeof(struct gunze), GFP_KERNEL);
	104	input_dev = input_allocate_device();
	105	if (!gunze \|\| !input_dev) {
	106	err = -ENOMEM;
52c1f570	107	goto fail1;
eca1ed19	108	}
1da177e4 LT	109
1da177e4 LT	110	gunze->serio = serio;
eca1ed19	111	gunze->dev = input_dev;
a21466cc	112	snprintf(gunze->phys, sizeof(serio->phys), "%s/input0", serio->phys);
1da177e4	113
eca1ed19 DT	114	input_dev->name = "Gunze AHL-51S TouchScreen";
	115	input_dev->phys = gunze->phys;
	116	input_dev->id.bustype = BUS_RS232;
	117	input_dev->id.vendor = SERIO_GUNZE;
	118	input_dev->id.product = 0x0051;
	119	input_dev->id.version = 0x0100;
a5394fb0	120	input_dev->dev.parent = &serio->dev;
7b19ada2 JS	121	input_dev->evbit[0] = BIT_MASK(EV_KEY) \| BIT_MASK(EV_ABS);
7b19ada2 JS	122	input_dev->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH);
eca1ed19 DT	123	input_set_abs_params(input_dev, ABS_X, 24, 1000, 0, 0);
eca1ed19 DT	124	input_set_abs_params(input_dev, ABS_Y, 24, 1000, 0, 0);
1da177e4 LT	125
	126	serio_set_drvdata(serio, gunze);
	127
	128	err = serio_open(serio, drv);
eca1ed19	129	if (err)
52c1f570 DT	130	goto fail2;
	131
	132	err = input_register_device(gunze->dev);
	133	if (err)
	134	goto fail3;
1da177e4 LT	135
1da177e4 LT	136	return 0;
eca1ed19	137
52c1f570 DT	138	fail3: serio_close(serio);
	139	fail2: serio_set_drvdata(serio, NULL);
	140	fail1: input_free_device(input_dev);
eca1ed19 DT	141	kfree(gunze);
eca1ed19 DT	142	return err;
1da177e4 LT	143	}
	144
	145	/*
	146	* The serio driver structure.
	147	*/
	148
73300904	149	static const struct serio_device_id gunze_serio_ids[] = {
1da177e4 LT	150	{
	151	.type = SERIO_RS232,
	152	.proto = SERIO_GUNZE,
	153	.id = SERIO_ANY,
	154	.extra = SERIO_ANY,
	155	},
	156	{ 0 }
	157	};
	158
	159	MODULE_DEVICE_TABLE(serio, gunze_serio_ids);
	160
	161	static struct serio_driver gunze_drv = {
	162	.driver = {
	163	.name = "gunze",
	164	},
	165	.description = DRIVER_DESC,
	166	.id_table = gunze_serio_ids,
	167	.interrupt = gunze_interrupt,
	168	.connect = gunze_connect,
	169	.disconnect = gunze_disconnect,
	170	};
	171
65ac9f7a	172	module_serio_driver(gunze_drv);