[linux-2.6-block.git] / drivers / input / touchscreen / elo.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 * Elo serial touchscreen driver
 *
 * Copyright (c) 2004 Vojtech Pavlik
 */


/*
 * This driver can handle serial Elo touchscreens using either the Elo standard
 * 'E271-2210' 10-byte protocol, Elo legacy 'E281A-4002' 6-byte protocol, Elo
 * legacy 'E271-140' 4-byte protocol and Elo legacy 'E261-280' 3-byte protocol.
 */

#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/ctype.h>

#define DRIVER_DESC	"Elo serial touchscreen driver"

MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_LICENSE("GPL");

/*
 * Definitions & global arrays.
 */

#define ELO_MAX_LENGTH		10

#define ELO10_PACKET_LEN	8
#define ELO10_TOUCH		0x03
#define ELO10_PRESSURE		0x80

#define ELO10_LEAD_BYTE		'U'

#define ELO10_ID_CMD		'i'

#define ELO10_TOUCH_PACKET	'T'
#define ELO10_ACK_PACKET	'A'
#define ELI10_ID_PACKET		'I'

/*
 * Per-touchscreen data.
 */

struct elo {
	struct input_dev *dev;
	struct serio *serio;
	struct mutex cmd_mutex;
	struct completion cmd_done;
	int id;
	int idx;
	unsigned char expected_packet;
	unsigned char csum;
	unsigned char data[ELO_MAX_LENGTH];
	unsigned char response[ELO10_PACKET_LEN];
	char phys[32];
};

static void elo_process_data_10(struct elo *elo, unsigned char data)
{
	struct input_dev *dev = elo->dev;

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

	switch (elo->idx++) {
	case 0:
		elo->csum = 0xaa;
		if (data != ELO10_LEAD_BYTE) {
			dev_dbg(&elo->serio->dev,
				"unsynchronized data: 0x%02x\n", data);
			elo->idx = 0;
		}
		break;

	case 9:
		elo->idx = 0;
		if (data != elo->csum) {
			dev_dbg(&elo->serio->dev,
				"bad checksum: 0x%02x, expected 0x%02x\n",
				 data, elo->csum);
			break;
		}
		if (elo->data[1] != elo->expected_packet) {
			if (elo->data[1] != ELO10_TOUCH_PACKET)
				dev_dbg(&elo->serio->dev,
					"unexpected packet: 0x%02x\n",
					 elo->data[1]);
			break;
		}
		if (likely(elo->data[1] == ELO10_TOUCH_PACKET)) {
			input_report_abs(dev, ABS_X, (elo->data[4] << 8) | elo->data[3]);
			input_report_abs(dev, ABS_Y, (elo->data[6] << 8) | elo->data[5]);
			if (elo->data[2] & ELO10_PRESSURE)
				input_report_abs(dev, ABS_PRESSURE,
						(elo->data[8] << 8) | elo->data[7]);
			input_report_key(dev, BTN_TOUCH, elo->data[2] & ELO10_TOUCH);
			input_sync(dev);
		} else if (elo->data[1] == ELO10_ACK_PACKET) {
			if (elo->data[2] == '0')
				elo->expected_packet = ELO10_TOUCH_PACKET;
			complete(&elo->cmd_done);
		} else {
			memcpy(elo->response, &elo->data[1], ELO10_PACKET_LEN);
			elo->expected_packet = ELO10_ACK_PACKET;
		}
		break;
	}
	elo->csum += data;
}

static void elo_process_data_6(struct elo *elo, unsigned char data)
{
	struct input_dev *dev = elo->dev;

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

	switch (elo->idx++) {

	case 0:
		if ((data & 0xc0) != 0xc0)
			elo->idx = 0;
		break;

	case 1:
		if ((data & 0xc0) != 0x80)
			elo->idx = 0;
		break;

	case 2:
		if ((data & 0xc0) != 0x40)
			elo->idx = 0;
		break;

	case 3:
		if (data & 0xc0) {
			elo->idx = 0;
			break;
		}

		input_report_abs(dev, ABS_X, ((elo->data[0] & 0x3f) << 6) | (elo->data[1] & 0x3f));
		input_report_abs(dev, ABS_Y, ((elo->data[2] & 0x3f) << 6) | (elo->data[3] & 0x3f));

		if (elo->id == 2) {
			input_report_key(dev, BTN_TOUCH, 1);
			input_sync(dev);
			elo->idx = 0;
		}

		break;

	case 4:
		if (data) {
			input_sync(dev);
			elo->idx = 0;
		}
		break;

	case 5:
		if ((data & 0xf0) == 0) {
			input_report_abs(dev, ABS_PRESSURE, elo->data[5]);
			input_report_key(dev, BTN_TOUCH, !!elo->data[5]);
		}
		input_sync(dev);
		elo->idx = 0;
		break;
	}
}

static void elo_process_data_3(struct elo *elo, unsigned char data)
{
	struct input_dev *dev = elo->dev;

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

	switch (elo->idx++) {

	case 0:
		if ((data & 0x7f) != 0x01)
			elo->idx = 0;
		break;
	case 2:
		input_report_key(dev, BTN_TOUCH, !(elo->data[1] & 0x80));
		input_report_abs(dev, ABS_X, elo->data[1]);
		input_report_abs(dev, ABS_Y, elo->data[2]);
		input_sync(dev);
		elo->idx = 0;
		break;
	}
}

static irqreturn_t elo_interrupt(struct serio *serio,
		unsigned char data, unsigned int flags)
{
	struct elo *elo = serio_get_drvdata(serio);

	switch (elo->id) {
	case 0:
		elo_process_data_10(elo, data);
		break;

	case 1:
	case 2:
		elo_process_data_6(elo, data);
		break;

	case 3:
		elo_process_data_3(elo, data);
		break;
	}

	return IRQ_HANDLED;
}

static int elo_command_10(struct elo *elo, unsigned char *packet)
{
	int rc = -1;
	int i;
	unsigned char csum = 0xaa + ELO10_LEAD_BYTE;

	mutex_lock(&elo->cmd_mutex);

	serio_pause_rx(elo->serio);
	elo->expected_packet = toupper(packet[0]);
	init_completion(&elo->cmd_done);
	serio_continue_rx(elo->serio);

	if (serio_write(elo->serio, ELO10_LEAD_BYTE))
		goto out;

	for (i = 0; i < ELO10_PACKET_LEN; i++) {
		csum += packet[i];
		if (serio_write(elo->serio, packet[i]))
			goto out;
	}

	if (serio_write(elo->serio, csum))
		goto out;

	wait_for_completion_timeout(&elo->cmd_done, HZ);

	if (elo->expected_packet == ELO10_TOUCH_PACKET) {
		/* We are back in reporting mode, the command was ACKed */
		memcpy(packet, elo->response, ELO10_PACKET_LEN);
		rc = 0;
	}

 out:
	mutex_unlock(&elo->cmd_mutex);
	return rc;
}

static int elo_setup_10(struct elo *elo)
{
	static const char *elo_types[] = { "Accu", "Dura", "Intelli", "Carroll" };
	struct input_dev *dev = elo->dev;
	unsigned char packet[ELO10_PACKET_LEN] = { ELO10_ID_CMD };

	if (elo_command_10(elo, packet))
		return -1;

	dev->id.version = (packet[5] << 8) | packet[4];

	input_set_abs_params(dev, ABS_X, 96, 4000, 0, 0);
	input_set_abs_params(dev, ABS_Y, 96, 4000, 0, 0);
	if (packet[3] & ELO10_PRESSURE)
		input_set_abs_params(dev, ABS_PRESSURE, 0, 255, 0, 0);

	dev_info(&elo->serio->dev,
		 "%sTouch touchscreen, fw: %02x.%02x, features: 0x%02x, controller: 0x%02x\n",
		 elo_types[(packet[1] -'0') & 0x03],
		 packet[5], packet[4], packet[3], packet[7]);

	return 0;
}

/*
 * elo_disconnect() is the opposite of elo_connect()
 */

static void elo_disconnect(struct serio *serio)
{
	struct elo *elo = serio_get_drvdata(serio);

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

/*
 * elo_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 elo_connect(struct serio *serio, struct serio_driver *drv)
{
	struct elo *elo;
	struct input_dev *input_dev;
	int err;

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

	elo->serio = serio;
	elo->id = serio->id.id;
	elo->dev = input_dev;
	elo->expected_packet = ELO10_TOUCH_PACKET;
	mutex_init(&elo->cmd_mutex);
	init_completion(&elo->cmd_done);
	snprintf(elo->phys, sizeof(elo->phys), "%s/input0", serio->phys);

	input_dev->name = "Elo Serial TouchScreen";
	input_dev->phys = elo->phys;
	input_dev->id.bustype = BUS_RS232;
	input_dev->id.vendor = SERIO_ELO;
	input_dev->id.product = elo->id;
	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);

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

	switch (elo->id) {

	case 0: /* 10-byte protocol */
		if (elo_setup_10(elo)) {
			err = -EIO;
			goto fail3;
		}

		break;

	case 1: /* 6-byte protocol */
		input_set_abs_params(input_dev, ABS_PRESSURE, 0, 15, 0, 0);
		fallthrough;

	case 2: /* 4-byte protocol */
		input_set_abs_params(input_dev, ABS_X, 96, 4000, 0, 0);
		input_set_abs_params(input_dev, ABS_Y, 96, 4000, 0, 0);
		break;

	case 3: /* 3-byte protocol */
		input_set_abs_params(input_dev, ABS_X, 0, 255, 0, 0);
		input_set_abs_params(input_dev, ABS_Y, 0, 255, 0, 0);
		break;
	}

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

	return 0;

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

/*
 * The serio driver structure.
 */

static const struct serio_device_id elo_serio_ids[] = {
	{
		.type	= SERIO_RS232,
		.proto	= SERIO_ELO,
		.id	= SERIO_ANY,
		.extra	= SERIO_ANY,
	},
	{ 0 }
};

MODULE_DEVICE_TABLE(serio, elo_serio_ids);

static struct serio_driver elo_drv = {
	.driver		= {
		.name	= "elo",
	},
	.description	= DRIVER_DESC,
	.id_table	= elo_serio_ids,
	.interrupt	= elo_interrupt,
	.connect	= elo_connect,
	.disconnect	= elo_disconnect,
};

module_serio_driver(elo_drv);
Commit	Line	Data
d2912cb1	1	// SPDX-License-Identifier: GPL-2.0-only
1da177e4 LT	2	/*
	3	* Elo serial touchscreen driver
	4	*
	5	* Copyright (c) 2004 Vojtech Pavlik
	6	*/
	7
1da177e4 LT	8
	9	/*
	10	* This driver can handle serial Elo touchscreens using either the Elo standard
	11	* 'E271-2210' 10-byte protocol, Elo legacy 'E281A-4002' 6-byte protocol, Elo
	12	* legacy 'E271-140' 4-byte protocol and Elo legacy 'E261-280' 3-byte protocol.
	13	*/
	14
	15	#include <linux/errno.h>
	16	#include <linux/kernel.h>
	17	#include <linux/module.h>
	18	#include <linux/slab.h>
	19	#include <linux/input.h>
	20	#include <linux/serio.h>
fae3006e	21	#include <linux/ctype.h>
1da177e4 LT	22
	23	#define DRIVER_DESC "Elo serial touchscreen driver"
	24
	25	MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
	26	MODULE_DESCRIPTION(DRIVER_DESC);
	27	MODULE_LICENSE("GPL");
	28
	29	/*
	30	* Definitions & global arrays.
	31	*/
	32
1ce316ef SJ	33	#define ELO_MAX_LENGTH 10
1ce316ef SJ	34
fae3006e SJ	35	#define ELO10_PACKET_LEN 8
	36	#define ELO10_TOUCH 0x03
	37	#define ELO10_PRESSURE 0x80
	38
1ce316ef SJ	39	#define ELO10_LEAD_BYTE 'U'
1ce316ef SJ	40
fae3006e SJ	41	#define ELO10_ID_CMD 'i'
fae3006e SJ	42
1ce316ef	43	#define ELO10_TOUCH_PACKET 'T'
fae3006e SJ	44	#define ELO10_ACK_PACKET 'A'
fae3006e SJ	45	#define ELI10_ID_PACKET 'I'
1da177e4	46
1da177e4 LT	47	/*
	48	* Per-touchscreen data.
	49	*/
	50
	51	struct elo {
eca1ed19	52	struct input_dev *dev;
1da177e4	53	struct serio *serio;
fae3006e SJ	54	struct mutex cmd_mutex;
fae3006e SJ	55	struct completion cmd_done;
1da177e4 LT	56	int id;
1da177e4 LT	57	int idx;
fae3006e	58	unsigned char expected_packet;
1da177e4 LT	59	unsigned char csum;
1da177e4 LT	60	unsigned char data[ELO_MAX_LENGTH];
fae3006e	61	unsigned char response[ELO10_PACKET_LEN];
1da177e4 LT	62	char phys[32];
	63	};
	64
7d12e780	65	static void elo_process_data_10(struct elo *elo, unsigned char data)
1da177e4	66	{
eca1ed19	67	struct input_dev *dev = elo->dev;
1da177e4	68
1ce316ef	69	elo->data[elo->idx] = data;
1da177e4	70
8cab9ba1 DT	71	switch (elo->idx++) {
	72	case 0:
	73	elo->csum = 0xaa;
	74	if (data != ELO10_LEAD_BYTE) {
	75	dev_dbg(&elo->serio->dev,
	76	"unsynchronized data: 0x%02x\n", data);
1da177e4	77	elo->idx = 0;
8cab9ba1 DT	78	}
	79	break;
	80
	81	case 9:
	82	elo->idx = 0;
	83	if (data != elo->csum) {
	84	dev_dbg(&elo->serio->dev,
	85	"bad checksum: 0x%02x, expected 0x%02x\n",
	86	data, elo->csum);
	87	break;
	88	}
	89	if (elo->data[1] != elo->expected_packet) {
	90	if (elo->data[1] != ELO10_TOUCH_PACKET)
	91	dev_dbg(&elo->serio->dev,
	92	"unexpected packet: 0x%02x\n",
	93	elo->data[1]);
1da177e4	94	break;
8cab9ba1 DT	95	}
	96	if (likely(elo->data[1] == ELO10_TOUCH_PACKET)) {
	97	input_report_abs(dev, ABS_X, (elo->data[4] << 8) \| elo->data[3]);
	98	input_report_abs(dev, ABS_Y, (elo->data[6] << 8) \| elo->data[5]);
	99	if (elo->data[2] & ELO10_PRESSURE)
	100	input_report_abs(dev, ABS_PRESSURE,
	101	(elo->data[8] << 8) \| elo->data[7]);
	102	input_report_key(dev, BTN_TOUCH, elo->data[2] & ELO10_TOUCH);
	103	input_sync(dev);
	104	} else if (elo->data[1] == ELO10_ACK_PACKET) {
	105	if (elo->data[2] == '0')
	106	elo->expected_packet = ELO10_TOUCH_PACKET;
	107	complete(&elo->cmd_done);
	108	} else {
	109	memcpy(elo->response, &elo->data[1], ELO10_PACKET_LEN);
	110	elo->expected_packet = ELO10_ACK_PACKET;
	111	}
	112	break;
1da177e4	113	}
1ce316ef	114	elo->csum += data;
1da177e4 LT	115	}
1da177e4 LT	116
7d12e780	117	static void elo_process_data_6(struct elo *elo, unsigned char data)
1da177e4	118	{
eca1ed19	119	struct input_dev *dev = elo->dev;
1da177e4 LT	120
	121	elo->data[elo->idx] = data;
	122
	123	switch (elo->idx++) {
	124
8cab9ba1 DT	125	case 0:
	126	if ((data & 0xc0) != 0xc0)
	127	elo->idx = 0;
	128	break;
1da177e4	129
8cab9ba1 DT	130	case 1:
	131	if ((data & 0xc0) != 0x80)
	132	elo->idx = 0;
	133	break;
1da177e4	134
8cab9ba1 DT	135	case 2:
	136	if ((data & 0xc0) != 0x40)
	137	elo->idx = 0;
	138	break;
1da177e4	139
8cab9ba1 DT	140	case 3:
	141	if (data & 0xc0) {
	142	elo->idx = 0;
1da177e4	143	break;
8cab9ba1	144	}
1da177e4	145
8cab9ba1 DT	146	input_report_abs(dev, ABS_X, ((elo->data[0] & 0x3f) << 6) \| (elo->data[1] & 0x3f));
8cab9ba1 DT	147	input_report_abs(dev, ABS_Y, ((elo->data[2] & 0x3f) << 6) \| (elo->data[3] & 0x3f));
1da177e4	148
8cab9ba1 DT	149	if (elo->id == 2) {
8cab9ba1 DT	150	input_report_key(dev, BTN_TOUCH, 1);
1da177e4 LT	151	input_sync(dev);
1da177e4 LT	152	elo->idx = 0;
8cab9ba1 DT	153	}
	154
	155	break;
	156
	157	case 4:
	158	if (data) {
	159	input_sync(dev);
	160	elo->idx = 0;
	161	}
	162	break;
	163
	164	case 5:
	165	if ((data & 0xf0) == 0) {
	166	input_report_abs(dev, ABS_PRESSURE, elo->data[5]);
	167	input_report_key(dev, BTN_TOUCH, !!elo->data[5]);
	168	}
	169	input_sync(dev);
	170	elo->idx = 0;
	171	break;
1da177e4 LT	172	}
	173	}
	174
7d12e780	175	static void elo_process_data_3(struct elo *elo, unsigned char data)
1da177e4	176	{
eca1ed19	177	struct input_dev *dev = elo->dev;
1da177e4 LT	178
	179	elo->data[elo->idx] = data;
	180
	181	switch (elo->idx++) {
	182
8cab9ba1 DT	183	case 0:
8cab9ba1 DT	184	if ((data & 0x7f) != 0x01)
1da177e4	185	elo->idx = 0;
8cab9ba1 DT	186	break;
	187	case 2:
	188	input_report_key(dev, BTN_TOUCH, !(elo->data[1] & 0x80));
	189	input_report_abs(dev, ABS_X, elo->data[1]);
	190	input_report_abs(dev, ABS_Y, elo->data[2]);
	191	input_sync(dev);
	192	elo->idx = 0;
	193	break;
1da177e4 LT	194	}
	195	}
	196
	197	static irqreturn_t elo_interrupt(struct serio *serio,
7d12e780	198	unsigned char data, unsigned int flags)
1da177e4	199	{
1ce316ef	200	struct elo *elo = serio_get_drvdata(serio);
1da177e4	201
8cab9ba1 DT	202	switch (elo->id) {
	203	case 0:
	204	elo_process_data_10(elo, data);
	205	break;
	206
	207	case 1:
	208	case 2:
	209	elo_process_data_6(elo, data);
	210	break;
	211
	212	case 3:
	213	elo_process_data_3(elo, data);
	214	break;
1da177e4 LT	215	}
	216
	217	return IRQ_HANDLED;
	218	}
	219
fae3006e SJ	220	static int elo_command_10(struct elo elo, unsigned char packet)
	221	{
	222	int rc = -1;
	223	int i;
	224	unsigned char csum = 0xaa + ELO10_LEAD_BYTE;
	225
	226	mutex_lock(&elo->cmd_mutex);
	227
	228	serio_pause_rx(elo->serio);
	229	elo->expected_packet = toupper(packet[0]);
	230	init_completion(&elo->cmd_done);
	231	serio_continue_rx(elo->serio);
	232
	233	if (serio_write(elo->serio, ELO10_LEAD_BYTE))
	234	goto out;
	235
	236	for (i = 0; i < ELO10_PACKET_LEN; i++) {
	237	csum += packet[i];
	238	if (serio_write(elo->serio, packet[i]))
	239	goto out;
	240	}
	241
	242	if (serio_write(elo->serio, csum))
	243	goto out;
	244
	245	wait_for_completion_timeout(&elo->cmd_done, HZ);
	246
	247	if (elo->expected_packet == ELO10_TOUCH_PACKET) {
	248	/* We are back in reporting mode, the command was ACKed */
	249	memcpy(packet, elo->response, ELO10_PACKET_LEN);
	250	rc = 0;
	251	}
	252
	253	out:
	254	mutex_unlock(&elo->cmd_mutex);
	255	return rc;
	256	}
	257
	258	static int elo_setup_10(struct elo *elo)
	259	{
	260	static const char *elo_types[] = { "Accu", "Dura", "Intelli", "Carroll" };
	261	struct input_dev *dev = elo->dev;
	262	unsigned char packet[ELO10_PACKET_LEN] = { ELO10_ID_CMD };
	263
	264	if (elo_command_10(elo, packet))
	265	return -1;
	266
	267	dev->id.version = (packet[5] << 8) \| packet[4];
	268
	269	input_set_abs_params(dev, ABS_X, 96, 4000, 0, 0);
	270	input_set_abs_params(dev, ABS_Y, 96, 4000, 0, 0);
	271	if (packet[3] & ELO10_PRESSURE)
	272	input_set_abs_params(dev, ABS_PRESSURE, 0, 255, 0, 0);
	273
8cab9ba1 DT	274	dev_info(&elo->serio->dev,
	275	"%sTouch touchscreen, fw: %02x.%02x, features: 0x%02x, controller: 0x%02x\n",
	276	elo_types[(packet[1] -'0') & 0x03],
	277	packet[5], packet[4], packet[3], packet[7]);
fae3006e SJ	278
	279	return 0;
	280	}
	281
1da177e4 LT	282	/*
	283	* elo_disconnect() is the opposite of elo_connect()
	284	*/
	285
	286	static void elo_disconnect(struct serio *serio)
	287	{
6b50d8b8	288	struct elo *elo = serio_get_drvdata(serio);
1da177e4	289
6b50d8b8	290	input_get_device(elo->dev);
eca1ed19	291	input_unregister_device(elo->dev);
1da177e4 LT	292	serio_close(serio);
1da177e4 LT	293	serio_set_drvdata(serio, NULL);
6b50d8b8	294	input_put_device(elo->dev);
1da177e4 LT	295	kfree(elo);
	296	}
	297
	298	/*
	299	* elo_connect() is the routine that is called when someone adds a
	300	* new serio device that supports Gunze protocol and registers it as
	301	* an input device.
	302	*/
	303
	304	static int elo_connect(struct serio serio, struct serio_driver drv)
	305	{
	306	struct elo *elo;
eca1ed19	307	struct input_dev *input_dev;
1da177e4 LT	308	int err;
1da177e4 LT	309
f81d03d4	310	elo = kzalloc(sizeof(*elo), GFP_KERNEL);
eca1ed19 DT	311	input_dev = input_allocate_device();
	312	if (!elo \|\| !input_dev) {
	313	err = -ENOMEM;
6b50d8b8	314	goto fail1;
eca1ed19	315	}
1da177e4	316
eca1ed19 DT	317	elo->serio = serio;
	318	elo->id = serio->id.id;
	319	elo->dev = input_dev;
fae3006e SJ	320	elo->expected_packet = ELO10_TOUCH_PACKET;
	321	mutex_init(&elo->cmd_mutex);
	322	init_completion(&elo->cmd_done);
eca1ed19	323	snprintf(elo->phys, sizeof(elo->phys), "%s/input0", serio->phys);
1da177e4	324
eca1ed19 DT	325	input_dev->name = "Elo Serial TouchScreen";
	326	input_dev->phys = elo->phys;
	327	input_dev->id.bustype = BUS_RS232;
	328	input_dev->id.vendor = SERIO_ELO;
	329	input_dev->id.product = elo->id;
	330	input_dev->id.version = 0x0100;
a5394fb0	331	input_dev->dev.parent = &serio->dev;
1da177e4	332
7b19ada2 JS	333	input_dev->evbit[0] = BIT_MASK(EV_KEY) \| BIT_MASK(EV_ABS);
7b19ada2 JS	334	input_dev->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH);
1da177e4	335
fae3006e SJ	336	serio_set_drvdata(serio, elo);
	337	err = serio_open(serio, drv);
	338	if (err)
	339	goto fail2;
	340
1da177e4 LT	341	switch (elo->id) {
1da177e4 LT	342
8cab9ba1	343	case 0: /* 10-byte protocol */
0958351e DC	344	if (elo_setup_10(elo)) {
0958351e DC	345	err = -EIO;
8cab9ba1	346	goto fail3;
0958351e	347	}
fae3006e	348
8cab9ba1	349	break;
de1b963a	350
8cab9ba1 DT	351	case 1: /* 6-byte protocol */
8cab9ba1 DT	352	input_set_abs_params(input_dev, ABS_PRESSURE, 0, 15, 0, 0);
6f49c4f5	353	fallthrough;
1da177e4	354
8cab9ba1 DT	355	case 2: /* 4-byte protocol */
	356	input_set_abs_params(input_dev, ABS_X, 96, 4000, 0, 0);
	357	input_set_abs_params(input_dev, ABS_Y, 96, 4000, 0, 0);
	358	break;
1da177e4	359
8cab9ba1 DT	360	case 3: /* 3-byte protocol */
	361	input_set_abs_params(input_dev, ABS_X, 0, 255, 0, 0);
	362	input_set_abs_params(input_dev, ABS_Y, 0, 255, 0, 0);
	363	break;
1da177e4 LT	364	}
1da177e4 LT	365
6b50d8b8 DT	366	err = input_register_device(elo->dev);
	367	if (err)
	368	goto fail3;
1da177e4 LT	369
1da177e4 LT	370	return 0;
eca1ed19	371
6b50d8b8 DT	372	fail3: serio_close(serio);
	373	fail2: serio_set_drvdata(serio, NULL);
	374	fail1: input_free_device(input_dev);
eca1ed19 DT	375	kfree(elo);
eca1ed19 DT	376	return err;
1da177e4 LT	377	}
	378
	379	/*
	380	* The serio driver structure.
	381	*/
	382
4f8d5241	383	static const struct serio_device_id elo_serio_ids[] = {
1da177e4 LT	384	{
	385	.type = SERIO_RS232,
	386	.proto = SERIO_ELO,
	387	.id = SERIO_ANY,
	388	.extra = SERIO_ANY,
	389	},
	390	{ 0 }
	391	};
	392
	393	MODULE_DEVICE_TABLE(serio, elo_serio_ids);
	394
	395	static struct serio_driver elo_drv = {
	396	.driver = {
	397	.name = "elo",
	398	},
	399	.description = DRIVER_DESC,
	400	.id_table = elo_serio_ids,
	401	.interrupt = elo_interrupt,
	402	.connect = elo_connect,
	403	.disconnect = elo_disconnect,
	404	};
	405
65ac9f7a	406	module_serio_driver(elo_drv);