[mirror_ubuntu-artful-kernel.git] / drivers / input / touchscreen / elo.c

/*
 * Elo serial touchscreen driver
 *
 * 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.
 */

/*
 * 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/init.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) {
				pr_debug("elo: unsynchronized data: 0x%02x\n", data);
				elo->idx = 0;
			}
			break;

		case 9:
			elo->idx = 0;
			if (data != elo->csum) {
				pr_debug("elo: 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)
					pr_debug("elo: 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);

	printk(KERN_INFO "elo: %sTouch touchscreen, fw: %02x.%02x, "
		"features: %x02x, 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(struct 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->private = elo;
	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->cdev.dev = &serio->dev;

	input_dev->evbit[0] = BIT(EV_KEY) | BIT(EV_ABS);
	input_dev->keybit[LONG(BTN_TOUCH)] = BIT(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))
				goto fail3;

			break;

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

		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 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,
};

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

static int __init elo_init(void)
{
	serio_register_driver(&elo_drv);
	return 0;
}

static void __exit elo_exit(void)
{
	serio_unregister_driver(&elo_drv);
}

module_init(elo_init);
module_exit(elo_exit);
Commit	Line	Data
1da177e4 LT	1	/*
	2	* Elo serial touchscreen driver
	3	*
	4	* Copyright (c) 2004 Vojtech Pavlik
	5	*/
	6
	7	/*
	8	* This program is free software; you can redistribute it and/or modify it
	9	* under the terms of the GNU General Public License version 2 as published by
	10	* the Free Software Foundation.
	11	*/
	12
	13	/*
	14	* This driver can handle serial Elo touchscreens using either the Elo standard
	15	* 'E271-2210' 10-byte protocol, Elo legacy 'E281A-4002' 6-byte protocol, Elo
	16	* legacy 'E271-140' 4-byte protocol and Elo legacy 'E261-280' 3-byte protocol.
	17	*/
	18
	19	#include <linux/errno.h>
	20	#include <linux/kernel.h>
	21	#include <linux/module.h>
	22	#include <linux/slab.h>
	23	#include <linux/input.h>
	24	#include <linux/serio.h>
	25	#include <linux/init.h>
fae3006e	26	#include <linux/ctype.h>
1da177e4 LT	27
	28	#define DRIVER_DESC "Elo serial touchscreen driver"
	29
	30	MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
	31	MODULE_DESCRIPTION(DRIVER_DESC);
	32	MODULE_LICENSE("GPL");
	33
	34	/*
	35	* Definitions & global arrays.
	36	*/
	37
1ce316ef SJ	38	#define ELO_MAX_LENGTH 10
1ce316ef SJ	39
fae3006e SJ	40	#define ELO10_PACKET_LEN 8
	41	#define ELO10_TOUCH 0x03
	42	#define ELO10_PRESSURE 0x80
	43
1ce316ef SJ	44	#define ELO10_LEAD_BYTE 'U'
1ce316ef SJ	45
fae3006e SJ	46	#define ELO10_ID_CMD 'i'
fae3006e SJ	47
1ce316ef	48	#define ELO10_TOUCH_PACKET 'T'
fae3006e SJ	49	#define ELO10_ACK_PACKET 'A'
fae3006e SJ	50	#define ELI10_ID_PACKET 'I'
1da177e4	51
1da177e4 LT	52	/*
	53	* Per-touchscreen data.
	54	*/
	55
	56	struct elo {
eca1ed19	57	struct input_dev *dev;
1da177e4	58	struct serio *serio;
fae3006e SJ	59	struct mutex cmd_mutex;
fae3006e SJ	60	struct completion cmd_done;
1da177e4 LT	61	int id;
1da177e4 LT	62	int idx;
fae3006e	63	unsigned char expected_packet;
1da177e4 LT	64	unsigned char csum;
1da177e4 LT	65	unsigned char data[ELO_MAX_LENGTH];
fae3006e	66	unsigned char response[ELO10_PACKET_LEN];
1da177e4 LT	67	char phys[32];
	68	};
	69
7d12e780	70	static void elo_process_data_10(struct elo *elo, unsigned char data)
1da177e4	71	{
eca1ed19	72	struct input_dev *dev = elo->dev;
1da177e4	73
1ce316ef	74	elo->data[elo->idx] = data;
1da177e4	75	switch (elo->idx++) {
1da177e4	76	case 0:
1ce316ef SJ	77	elo->csum = 0xaa;
	78	if (data != ELO10_LEAD_BYTE) {
	79	pr_debug("elo: unsynchronized data: 0x%02x\n", data);
1da177e4	80	elo->idx = 0;
1da177e4 LT	81	}
	82	break;
	83
	84	case 9:
1da177e4	85	elo->idx = 0;
1ce316ef SJ	86	if (data != elo->csum) {
	87	pr_debug("elo: bad checksum: 0x%02x, expected 0x%02x\n",
	88	data, elo->csum);
	89	break;
	90	}
fae3006e SJ	91	if (elo->data[1] != elo->expected_packet) {
	92	if (elo->data[1] != ELO10_TOUCH_PACKET)
	93	pr_debug("elo: unexpected packet: 0x%02x\n",
	94	elo->data[1]);
1ce316ef SJ	95	break;
1ce316ef SJ	96	}
fae3006e	97	if (likely(elo->data[1] == ELO10_TOUCH_PACKET)) {
fae3006e SJ	98	input_report_abs(dev, ABS_X, (elo->data[4] << 8) \| elo->data[3]);
	99	input_report_abs(dev, ABS_Y, (elo->data[6] << 8) \| elo->data[5]);
	100	if (elo->data[2] & ELO10_PRESSURE)
	101	input_report_abs(dev, ABS_PRESSURE,
	102	(elo->data[8] << 8) \| elo->data[7]);
	103	input_report_key(dev, BTN_TOUCH, elo->data[2] & ELO10_TOUCH);
	104	input_sync(dev);
	105	} else if (elo->data[1] == ELO10_ACK_PACKET) {
	106	if (elo->data[2] == '0')
	107	elo->expected_packet = ELO10_TOUCH_PACKET;
	108	complete(&elo->cmd_done);
	109	} else {
	110	memcpy(elo->response, &elo->data[1], ELO10_PACKET_LEN);
	111	elo->expected_packet = ELO10_ACK_PACKET;
	112	}
1da177e4 LT	113	break;
1da177e4 LT	114	}
1ce316ef	115	elo->csum += data;
1da177e4 LT	116	}
1da177e4 LT	117
7d12e780	118	static void elo_process_data_6(struct elo *elo, unsigned char data)
1da177e4	119	{
eca1ed19	120	struct input_dev *dev = elo->dev;
1da177e4 LT	121
	122	elo->data[elo->idx] = data;
	123
	124	switch (elo->idx++) {
	125
	126	case 0: if ((data & 0xc0) != 0xc0) elo->idx = 0; break;
	127	case 1: if ((data & 0xc0) != 0x80) elo->idx = 0; break;
	128	case 2: if ((data & 0xc0) != 0x40) elo->idx = 0; break;
	129
	130	case 3:
	131	if (data & 0xc0) {
	132	elo->idx = 0;
	133	break;
	134	}
	135
1da177e4 LT	136	input_report_abs(dev, ABS_X, ((elo->data[0] & 0x3f) << 6) \| (elo->data[1] & 0x3f));
	137	input_report_abs(dev, ABS_Y, ((elo->data[2] & 0x3f) << 6) \| (elo->data[3] & 0x3f));
	138
	139	if (elo->id == 2) {
	140	input_report_key(dev, BTN_TOUCH, 1);
	141	input_sync(dev);
	142	elo->idx = 0;
	143	}
	144
	145	break;
	146
	147	case 4:
	148	if (data) {
	149	input_sync(dev);
	150	elo->idx = 0;
	151	}
	152	break;
	153
	154	case 5:
	155	if ((data & 0xf0) == 0) {
	156	input_report_abs(dev, ABS_PRESSURE, elo->data[5]);
eca1ed19	157	input_report_key(dev, BTN_TOUCH, !!elo->data[5]);
1da177e4 LT	158	}
	159	input_sync(dev);
	160	elo->idx = 0;
	161	break;
	162	}
	163	}
	164
7d12e780	165	static void elo_process_data_3(struct elo *elo, unsigned char data)
1da177e4	166	{
eca1ed19	167	struct input_dev *dev = elo->dev;
1da177e4 LT	168
	169	elo->data[elo->idx] = data;
	170
	171	switch (elo->idx++) {
	172
	173	case 0:
	174	if ((data & 0x7f) != 0x01)
	175	elo->idx = 0;
	176	break;
	177	case 2:
1da177e4 LT	178	input_report_key(dev, BTN_TOUCH, !(elo->data[1] & 0x80));
	179	input_report_abs(dev, ABS_X, elo->data[1]);
	180	input_report_abs(dev, ABS_Y, elo->data[2]);
	181	input_sync(dev);
	182	elo->idx = 0;
	183	break;
	184	}
	185	}
	186
	187	static irqreturn_t elo_interrupt(struct serio *serio,
7d12e780	188	unsigned char data, unsigned int flags)
1da177e4	189	{
1ce316ef	190	struct elo *elo = serio_get_drvdata(serio);
1da177e4 LT	191
	192	switch(elo->id) {
	193	case 0:
7d12e780	194	elo_process_data_10(elo, data);
1da177e4 LT	195	break;
	196
	197	case 1:
	198	case 2:
7d12e780	199	elo_process_data_6(elo, data);
1da177e4 LT	200	break;
	201
	202	case 3:
7d12e780	203	elo_process_data_3(elo, data);
1da177e4 LT	204	break;
	205	}
	206
	207	return IRQ_HANDLED;
	208	}
	209
fae3006e SJ	210	static int elo_command_10(struct elo elo, unsigned char packet)
	211	{
	212	int rc = -1;
	213	int i;
	214	unsigned char csum = 0xaa + ELO10_LEAD_BYTE;
	215
	216	mutex_lock(&elo->cmd_mutex);
	217
	218	serio_pause_rx(elo->serio);
	219	elo->expected_packet = toupper(packet[0]);
	220	init_completion(&elo->cmd_done);
	221	serio_continue_rx(elo->serio);
	222
	223	if (serio_write(elo->serio, ELO10_LEAD_BYTE))
	224	goto out;
	225
	226	for (i = 0; i < ELO10_PACKET_LEN; i++) {
	227	csum += packet[i];
	228	if (serio_write(elo->serio, packet[i]))
	229	goto out;
	230	}
	231
	232	if (serio_write(elo->serio, csum))
	233	goto out;
	234
	235	wait_for_completion_timeout(&elo->cmd_done, HZ);
	236
	237	if (elo->expected_packet == ELO10_TOUCH_PACKET) {
	238	/* We are back in reporting mode, the command was ACKed */
	239	memcpy(packet, elo->response, ELO10_PACKET_LEN);
	240	rc = 0;
	241	}
	242
	243	out:
	244	mutex_unlock(&elo->cmd_mutex);
	245	return rc;
	246	}
	247
	248	static int elo_setup_10(struct elo *elo)
	249	{
	250	static const char *elo_types[] = { "Accu", "Dura", "Intelli", "Carroll" };
	251	struct input_dev *dev = elo->dev;
	252	unsigned char packet[ELO10_PACKET_LEN] = { ELO10_ID_CMD };
	253
	254	if (elo_command_10(elo, packet))
	255	return -1;
	256
	257	dev->id.version = (packet[5] << 8) \| packet[4];
	258
	259	input_set_abs_params(dev, ABS_X, 96, 4000, 0, 0);
	260	input_set_abs_params(dev, ABS_Y, 96, 4000, 0, 0);
	261	if (packet[3] & ELO10_PRESSURE)
	262	input_set_abs_params(dev, ABS_PRESSURE, 0, 255, 0, 0);
	263
	264	printk(KERN_INFO "elo: %sTouch touchscreen, fw: %02x.%02x, "
	265	"features: %x02x, controller: 0x%02x\n",
	266	elo_types[(packet[1] -'0') & 0x03],
	267	packet[5], packet[4], packet[3], packet[7]);
	268
	269	return 0;
	270	}
	271
1da177e4 LT	272	/*
	273	* elo_disconnect() is the opposite of elo_connect()
	274	*/
	275
	276	static void elo_disconnect(struct serio *serio)
	277	{
6b50d8b8	278	struct elo *elo = serio_get_drvdata(serio);
1da177e4	279
6b50d8b8	280	input_get_device(elo->dev);
eca1ed19	281	input_unregister_device(elo->dev);
1da177e4 LT	282	serio_close(serio);
1da177e4 LT	283	serio_set_drvdata(serio, NULL);
6b50d8b8	284	input_put_device(elo->dev);
1da177e4 LT	285	kfree(elo);
	286	}
	287
	288	/*
	289	* elo_connect() is the routine that is called when someone adds a
	290	* new serio device that supports Gunze protocol and registers it as
	291	* an input device.
	292	*/
	293
	294	static int elo_connect(struct serio serio, struct serio_driver drv)
	295	{
	296	struct elo *elo;
eca1ed19	297	struct input_dev *input_dev;
1da177e4 LT	298	int err;
1da177e4 LT	299
eca1ed19 DT	300	elo = kzalloc(sizeof(struct elo), GFP_KERNEL);
	301	input_dev = input_allocate_device();
	302	if (!elo \|\| !input_dev) {
	303	err = -ENOMEM;
6b50d8b8	304	goto fail1;
eca1ed19	305	}
1da177e4	306
eca1ed19 DT	307	elo->serio = serio;
	308	elo->id = serio->id.id;
	309	elo->dev = input_dev;
fae3006e SJ	310	elo->expected_packet = ELO10_TOUCH_PACKET;
	311	mutex_init(&elo->cmd_mutex);
	312	init_completion(&elo->cmd_done);
eca1ed19	313	snprintf(elo->phys, sizeof(elo->phys), "%s/input0", serio->phys);
1da177e4	314
eca1ed19 DT	315	input_dev->private = elo;
	316	input_dev->name = "Elo Serial TouchScreen";
	317	input_dev->phys = elo->phys;
	318	input_dev->id.bustype = BUS_RS232;
	319	input_dev->id.vendor = SERIO_ELO;
	320	input_dev->id.product = elo->id;
	321	input_dev->id.version = 0x0100;
	322	input_dev->cdev.dev = &serio->dev;
1da177e4	323
eca1ed19 DT	324	input_dev->evbit[0] = BIT(EV_KEY) \| BIT(EV_ABS);
eca1ed19 DT	325	input_dev->keybit[LONG(BTN_TOUCH)] = BIT(BTN_TOUCH);
1da177e4	326
fae3006e SJ	327	serio_set_drvdata(serio, elo);
	328	err = serio_open(serio, drv);
	329	if (err)
	330	goto fail2;
	331
1da177e4 LT	332	switch (elo->id) {
	333
	334	case 0: /* 10-byte protocol */
fae3006e SJ	335	if (elo_setup_10(elo))
	336	goto fail3;
	337
1da177e4	338	break;
de1b963a	339
1da177e4	340	case 1: /* 6-byte protocol */
eca1ed19	341	input_set_abs_params(input_dev, ABS_PRESSURE, 0, 15, 0, 0);
1da177e4 LT	342
1da177e4 LT	343	case 2: /* 4-byte protocol */
eca1ed19 DT	344	input_set_abs_params(input_dev, ABS_X, 96, 4000, 0, 0);
eca1ed19 DT	345	input_set_abs_params(input_dev, ABS_Y, 96, 4000, 0, 0);
1da177e4 LT	346	break;
	347
	348	case 3: /* 3-byte protocol */
eca1ed19 DT	349	input_set_abs_params(input_dev, ABS_X, 0, 255, 0, 0);
eca1ed19 DT	350	input_set_abs_params(input_dev, ABS_Y, 0, 255, 0, 0);
1da177e4 LT	351	break;
	352	}
	353
6b50d8b8 DT	354	err = input_register_device(elo->dev);
	355	if (err)
	356	goto fail3;
1da177e4 LT	357
1da177e4 LT	358	return 0;
eca1ed19	359
6b50d8b8 DT	360	fail3: serio_close(serio);
	361	fail2: serio_set_drvdata(serio, NULL);
	362	fail1: input_free_device(input_dev);
eca1ed19 DT	363	kfree(elo);
eca1ed19 DT	364	return err;
1da177e4 LT	365	}
	366
	367	/*
	368	* The serio driver structure.
	369	*/
	370
	371	static struct serio_device_id elo_serio_ids[] = {
	372	{
	373	.type = SERIO_RS232,
	374	.proto = SERIO_ELO,
	375	.id = SERIO_ANY,
	376	.extra = SERIO_ANY,
	377	},
	378	{ 0 }
	379	};
	380
	381	MODULE_DEVICE_TABLE(serio, elo_serio_ids);
	382
	383	static struct serio_driver elo_drv = {
	384	.driver = {
	385	.name = "elo",
	386	},
	387	.description = DRIVER_DESC,
	388	.id_table = elo_serio_ids,
	389	.interrupt = elo_interrupt,
	390	.connect = elo_connect,
	391	.disconnect = elo_disconnect,
	392	};
	393
	394	/*
	395	* The functions for inserting/removing us as a module.
	396	*/
	397
	398	static int __init elo_init(void)
	399	{
	400	serio_register_driver(&elo_drv);
	401	return 0;
	402	}
	403
	404	static void __exit elo_exit(void)
	405	{
	406	serio_unregister_driver(&elo_drv);
	407	}
	408
	409	module_init(elo_init);
	410	module_exit(elo_exit);