[deliverable/linux.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/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(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->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))
			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,
};

module_serio_driver(elo_drv);
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>
fae3006e	25	#include <linux/ctype.h>
1da177e4 LT	26
	27	#define DRIVER_DESC "Elo serial touchscreen driver"
	28
	29	MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
	30	MODULE_DESCRIPTION(DRIVER_DESC);
	31	MODULE_LICENSE("GPL");
	32
	33	/*
	34	* Definitions & global arrays.
	35	*/
	36
1ce316ef SJ	37	#define ELO_MAX_LENGTH 10
1ce316ef SJ	38
fae3006e SJ	39	#define ELO10_PACKET_LEN 8
	40	#define ELO10_TOUCH 0x03
	41	#define ELO10_PRESSURE 0x80
	42
1ce316ef SJ	43	#define ELO10_LEAD_BYTE 'U'
1ce316ef SJ	44
fae3006e SJ	45	#define ELO10_ID_CMD 'i'
fae3006e SJ	46
1ce316ef	47	#define ELO10_TOUCH_PACKET 'T'
fae3006e SJ	48	#define ELO10_ACK_PACKET 'A'
fae3006e SJ	49	#define ELI10_ID_PACKET 'I'
1da177e4	50
1da177e4 LT	51	/*
	52	* Per-touchscreen data.
	53	*/
	54
	55	struct elo {
eca1ed19	56	struct input_dev *dev;
1da177e4	57	struct serio *serio;
fae3006e SJ	58	struct mutex cmd_mutex;
fae3006e SJ	59	struct completion cmd_done;
1da177e4 LT	60	int id;
1da177e4 LT	61	int idx;
fae3006e	62	unsigned char expected_packet;
1da177e4 LT	63	unsigned char csum;
1da177e4 LT	64	unsigned char data[ELO_MAX_LENGTH];
fae3006e	65	unsigned char response[ELO10_PACKET_LEN];
1da177e4 LT	66	char phys[32];
	67	};
	68
7d12e780	69	static void elo_process_data_10(struct elo *elo, unsigned char data)
1da177e4	70	{
eca1ed19	71	struct input_dev *dev = elo->dev;
1da177e4	72
1ce316ef	73	elo->data[elo->idx] = data;
1da177e4	74
8cab9ba1 DT	75	switch (elo->idx++) {
	76	case 0:
	77	elo->csum = 0xaa;
	78	if (data != ELO10_LEAD_BYTE) {
	79	dev_dbg(&elo->serio->dev,
	80	"unsynchronized data: 0x%02x\n", data);
1da177e4	81	elo->idx = 0;
8cab9ba1 DT	82	}
	83	break;
	84
	85	case 9:
	86	elo->idx = 0;
	87	if (data != elo->csum) {
	88	dev_dbg(&elo->serio->dev,
	89	"bad checksum: 0x%02x, expected 0x%02x\n",
	90	data, elo->csum);
	91	break;
	92	}
	93	if (elo->data[1] != elo->expected_packet) {
	94	if (elo->data[1] != ELO10_TOUCH_PACKET)
	95	dev_dbg(&elo->serio->dev,
	96	"unexpected packet: 0x%02x\n",
	97	elo->data[1]);
1da177e4	98	break;
8cab9ba1 DT	99	}
	100	if (likely(elo->data[1] == ELO10_TOUCH_PACKET)) {
	101	input_report_abs(dev, ABS_X, (elo->data[4] << 8) \| elo->data[3]);
	102	input_report_abs(dev, ABS_Y, (elo->data[6] << 8) \| elo->data[5]);
	103	if (elo->data[2] & ELO10_PRESSURE)
	104	input_report_abs(dev, ABS_PRESSURE,
	105	(elo->data[8] << 8) \| elo->data[7]);
	106	input_report_key(dev, BTN_TOUCH, elo->data[2] & ELO10_TOUCH);
	107	input_sync(dev);
	108	} else if (elo->data[1] == ELO10_ACK_PACKET) {
	109	if (elo->data[2] == '0')
	110	elo->expected_packet = ELO10_TOUCH_PACKET;
	111	complete(&elo->cmd_done);
	112	} else {
	113	memcpy(elo->response, &elo->data[1], ELO10_PACKET_LEN);
	114	elo->expected_packet = ELO10_ACK_PACKET;
	115	}
	116	break;
1da177e4	117	}
1ce316ef	118	elo->csum += data;
1da177e4 LT	119	}
1da177e4 LT	120
7d12e780	121	static void elo_process_data_6(struct elo *elo, unsigned char data)
1da177e4	122	{
eca1ed19	123	struct input_dev *dev = elo->dev;
1da177e4 LT	124
	125	elo->data[elo->idx] = data;
	126
	127	switch (elo->idx++) {
	128
8cab9ba1 DT	129	case 0:
	130	if ((data & 0xc0) != 0xc0)
	131	elo->idx = 0;
	132	break;
1da177e4	133
8cab9ba1 DT	134	case 1:
	135	if ((data & 0xc0) != 0x80)
	136	elo->idx = 0;
	137	break;
1da177e4	138
8cab9ba1 DT	139	case 2:
	140	if ((data & 0xc0) != 0x40)
	141	elo->idx = 0;
	142	break;
1da177e4	143
8cab9ba1 DT	144	case 3:
	145	if (data & 0xc0) {
	146	elo->idx = 0;
1da177e4	147	break;
8cab9ba1	148	}
1da177e4	149
8cab9ba1 DT	150	input_report_abs(dev, ABS_X, ((elo->data[0] & 0x3f) << 6) \| (elo->data[1] & 0x3f));
8cab9ba1 DT	151	input_report_abs(dev, ABS_Y, ((elo->data[2] & 0x3f) << 6) \| (elo->data[3] & 0x3f));
1da177e4	152
8cab9ba1 DT	153	if (elo->id == 2) {
8cab9ba1 DT	154	input_report_key(dev, BTN_TOUCH, 1);
1da177e4 LT	155	input_sync(dev);
1da177e4 LT	156	elo->idx = 0;
8cab9ba1 DT	157	}
	158
	159	break;
	160
	161	case 4:
	162	if (data) {
	163	input_sync(dev);
	164	elo->idx = 0;
	165	}
	166	break;
	167
	168	case 5:
	169	if ((data & 0xf0) == 0) {
	170	input_report_abs(dev, ABS_PRESSURE, elo->data[5]);
	171	input_report_key(dev, BTN_TOUCH, !!elo->data[5]);
	172	}
	173	input_sync(dev);
	174	elo->idx = 0;
	175	break;
1da177e4 LT	176	}
	177	}
	178
7d12e780	179	static void elo_process_data_3(struct elo *elo, unsigned char data)
1da177e4	180	{
eca1ed19	181	struct input_dev *dev = elo->dev;
1da177e4 LT	182
	183	elo->data[elo->idx] = data;
	184
	185	switch (elo->idx++) {
	186
8cab9ba1 DT	187	case 0:
8cab9ba1 DT	188	if ((data & 0x7f) != 0x01)
1da177e4	189	elo->idx = 0;
8cab9ba1 DT	190	break;
	191	case 2:
	192	input_report_key(dev, BTN_TOUCH, !(elo->data[1] & 0x80));
	193	input_report_abs(dev, ABS_X, elo->data[1]);
	194	input_report_abs(dev, ABS_Y, elo->data[2]);
	195	input_sync(dev);
	196	elo->idx = 0;
	197	break;
1da177e4 LT	198	}
	199	}
	200
	201	static irqreturn_t elo_interrupt(struct serio *serio,
7d12e780	202	unsigned char data, unsigned int flags)
1da177e4	203	{
1ce316ef	204	struct elo *elo = serio_get_drvdata(serio);
1da177e4	205
8cab9ba1 DT	206	switch (elo->id) {
	207	case 0:
	208	elo_process_data_10(elo, data);
	209	break;
	210
	211	case 1:
	212	case 2:
	213	elo_process_data_6(elo, data);
	214	break;
	215
	216	case 3:
	217	elo_process_data_3(elo, data);
	218	break;
1da177e4 LT	219	}
	220
	221	return IRQ_HANDLED;
	222	}
	223
fae3006e SJ	224	static int elo_command_10(struct elo elo, unsigned char packet)
	225	{
	226	int rc = -1;
	227	int i;
	228	unsigned char csum = 0xaa + ELO10_LEAD_BYTE;
	229
	230	mutex_lock(&elo->cmd_mutex);
	231
	232	serio_pause_rx(elo->serio);
	233	elo->expected_packet = toupper(packet[0]);
	234	init_completion(&elo->cmd_done);
	235	serio_continue_rx(elo->serio);
	236
	237	if (serio_write(elo->serio, ELO10_LEAD_BYTE))
	238	goto out;
	239
	240	for (i = 0; i < ELO10_PACKET_LEN; i++) {
	241	csum += packet[i];
	242	if (serio_write(elo->serio, packet[i]))
	243	goto out;
	244	}
	245
	246	if (serio_write(elo->serio, csum))
	247	goto out;
	248
	249	wait_for_completion_timeout(&elo->cmd_done, HZ);
	250
	251	if (elo->expected_packet == ELO10_TOUCH_PACKET) {
	252	/* We are back in reporting mode, the command was ACKed */
	253	memcpy(packet, elo->response, ELO10_PACKET_LEN);
	254	rc = 0;
	255	}
	256
	257	out:
	258	mutex_unlock(&elo->cmd_mutex);
	259	return rc;
	260	}
	261
	262	static int elo_setup_10(struct elo *elo)
	263	{
	264	static const char *elo_types[] = { "Accu", "Dura", "Intelli", "Carroll" };
	265	struct input_dev *dev = elo->dev;
	266	unsigned char packet[ELO10_PACKET_LEN] = { ELO10_ID_CMD };
	267
	268	if (elo_command_10(elo, packet))
	269	return -1;
	270
	271	dev->id.version = (packet[5] << 8) \| packet[4];
	272
	273	input_set_abs_params(dev, ABS_X, 96, 4000, 0, 0);
	274	input_set_abs_params(dev, ABS_Y, 96, 4000, 0, 0);
	275	if (packet[3] & ELO10_PRESSURE)
	276	input_set_abs_params(dev, ABS_PRESSURE, 0, 255, 0, 0);
	277
8cab9ba1 DT	278	dev_info(&elo->serio->dev,
	279	"%sTouch touchscreen, fw: %02x.%02x, features: 0x%02x, controller: 0x%02x\n",
	280	elo_types[(packet[1] -'0') & 0x03],
	281	packet[5], packet[4], packet[3], packet[7]);
fae3006e SJ	282
	283	return 0;
	284	}
	285
1da177e4 LT	286	/*
	287	* elo_disconnect() is the opposite of elo_connect()
	288	*/
	289
	290	static void elo_disconnect(struct serio *serio)
	291	{
6b50d8b8	292	struct elo *elo = serio_get_drvdata(serio);
1da177e4	293
6b50d8b8	294	input_get_device(elo->dev);
eca1ed19	295	input_unregister_device(elo->dev);
1da177e4 LT	296	serio_close(serio);
1da177e4 LT	297	serio_set_drvdata(serio, NULL);
6b50d8b8	298	input_put_device(elo->dev);
1da177e4 LT	299	kfree(elo);
	300	}
	301
	302	/*
	303	* elo_connect() is the routine that is called when someone adds a
	304	* new serio device that supports Gunze protocol and registers it as
	305	* an input device.
	306	*/
	307
	308	static int elo_connect(struct serio serio, struct serio_driver drv)
	309	{
	310	struct elo *elo;
eca1ed19	311	struct input_dev *input_dev;
1da177e4 LT	312	int err;
1da177e4 LT	313
eca1ed19 DT	314	elo = kzalloc(sizeof(struct elo), GFP_KERNEL);
	315	input_dev = input_allocate_device();
	316	if (!elo \|\| !input_dev) {
	317	err = -ENOMEM;
6b50d8b8	318	goto fail1;
eca1ed19	319	}
1da177e4	320
eca1ed19 DT	321	elo->serio = serio;
	322	elo->id = serio->id.id;
	323	elo->dev = input_dev;
fae3006e SJ	324	elo->expected_packet = ELO10_TOUCH_PACKET;
	325	mutex_init(&elo->cmd_mutex);
	326	init_completion(&elo->cmd_done);
eca1ed19	327	snprintf(elo->phys, sizeof(elo->phys), "%s/input0", serio->phys);
1da177e4	328
eca1ed19 DT	329	input_dev->name = "Elo Serial TouchScreen";
	330	input_dev->phys = elo->phys;
	331	input_dev->id.bustype = BUS_RS232;
	332	input_dev->id.vendor = SERIO_ELO;
	333	input_dev->id.product = elo->id;
	334	input_dev->id.version = 0x0100;
a5394fb0	335	input_dev->dev.parent = &serio->dev;
1da177e4	336
7b19ada2 JS	337	input_dev->evbit[0] = BIT_MASK(EV_KEY) \| BIT_MASK(EV_ABS);
7b19ada2 JS	338	input_dev->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH);
1da177e4	339
fae3006e SJ	340	serio_set_drvdata(serio, elo);
	341	err = serio_open(serio, drv);
	342	if (err)
	343	goto fail2;
	344
1da177e4 LT	345	switch (elo->id) {
1da177e4 LT	346
8cab9ba1 DT	347	case 0: /* 10-byte protocol */
	348	if (elo_setup_10(elo))
	349	goto fail3;
fae3006e	350
8cab9ba1	351	break;
de1b963a	352
8cab9ba1 DT	353	case 1: /* 6-byte protocol */
8cab9ba1 DT	354	input_set_abs_params(input_dev, ABS_PRESSURE, 0, 15, 0, 0);
1da177e4	355
8cab9ba1 DT	356	case 2: /* 4-byte protocol */
	357	input_set_abs_params(input_dev, ABS_X, 96, 4000, 0, 0);
	358	input_set_abs_params(input_dev, ABS_Y, 96, 4000, 0, 0);
	359	break;
1da177e4	360
8cab9ba1 DT	361	case 3: /* 3-byte protocol */
	362	input_set_abs_params(input_dev, ABS_X, 0, 255, 0, 0);
	363	input_set_abs_params(input_dev, ABS_Y, 0, 255, 0, 0);
	364	break;
1da177e4 LT	365	}
1da177e4 LT	366
6b50d8b8 DT	367	err = input_register_device(elo->dev);
	368	if (err)
	369	goto fail3;
1da177e4 LT	370
1da177e4 LT	371	return 0;
eca1ed19	372
6b50d8b8 DT	373	fail3: serio_close(serio);
	374	fail2: serio_set_drvdata(serio, NULL);
	375	fail1: input_free_device(input_dev);
eca1ed19 DT	376	kfree(elo);
eca1ed19 DT	377	return err;
1da177e4 LT	378	}
	379
	380	/*
	381	* The serio driver structure.
	382	*/
	383
	384	static struct serio_device_id elo_serio_ids[] = {
	385	{
	386	.type = SERIO_RS232,
	387	.proto = SERIO_ELO,
	388	.id = SERIO_ANY,
	389	.extra = SERIO_ANY,
	390	},
	391	{ 0 }
	392	};
	393
	394	MODULE_DEVICE_TABLE(serio, elo_serio_ids);
	395
	396	static struct serio_driver elo_drv = {
	397	.driver = {
	398	.name = "elo",
	399	},
	400	.description = DRIVER_DESC,
	401	.id_table = elo_serio_ids,
	402	.interrupt = elo_interrupt,
	403	.connect = elo_connect,
	404	.disconnect = elo_disconnect,
	405	};
	406
65ac9f7a	407	module_serio_driver(elo_drv);