drivers/input/joystick/a3d.c - LeafOS-Devices/android_kernel_samsung_gta4xl - Gitiles

 /*
  *  Copyright (c) 1998-2001 Vojtech Pavlik
  */

 /*
  * FP-Gaming Assassin 3D joystick driver for Linux
  */

 /*
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
  * the Free Software Foundation; either version 2 of the License, or
  * (at your option) any later version.
  *
  * This program is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU General Public License for more details.
  *
  * You should have received a copy of the GNU General Public License
  * along with this program; if not, write to the Free Software
  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  *
  * Should you need to contact me, the author, you can do so either by
  * e-mail - mail your message to <vojtech@ucw.cz>, or by paper mail:
  * Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic
  */

 #include <linux/kernel.h>
 #include <linux/module.h>
 #include <linux/slab.h>
 #include <linux/gameport.h>
 #include <linux/input.h>
 #include <linux/jiffies.h>

 #define DRIVER_DESC	"FP-Gaming Assassin 3D joystick driver"

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

 #define A3D_MAX_START		600	/* 600 us */
 #define A3D_MAX_STROBE		80	/* 80 us */
 #define A3D_MAX_LENGTH		40	/* 40*3 bits */

 #define A3D_MODE_A3D		1	/* Assassin 3D */
 #define A3D_MODE_PAN		2	/* Panther */
 #define A3D_MODE_OEM		3	/* Panther OEM version */
 #define A3D_MODE_PXL		4	/* Panther XL */

 static char *a3d_names[] = { NULL, "FP-Gaming Assassin 3D", "MadCatz Panther", "OEM Panther",
 			"MadCatz Panther XL", "MadCatz Panther XL w/ rudder" };

 struct a3d {
 	struct gameport *gameport;
 	struct gameport *adc;
 	struct input_dev *dev;
 	int axes[4];
 	int buttons;
 	int mode;
 	int length;
 	int reads;
 	int bads;
 	char phys[32];
 };

 /*
  * a3d_read_packet() reads an Assassin 3D packet.
  */

 static int a3d_read_packet(struct gameport *gameport, int length, char *data)
 {
 	unsigned long flags;
 	unsigned char u, v;
 	unsigned int t, s;
 	int i;

 	i = 0;
 	t = gameport_time(gameport, A3D_MAX_START);
 	s = gameport_time(gameport, A3D_MAX_STROBE);

 	local_irq_save(flags);
 	gameport_trigger(gameport);
 	v = gameport_read(gameport);

 	while (t > 0 && i < length) {
 		t--;
 		u = v; v = gameport_read(gameport);
 		if (~v & u & 0x10) {
 			data[i++] = v >> 5;
 			t = s;
 		}
 	}

 	local_irq_restore(flags);

 	return i;
 }

 /*
  * a3d_csum() computes checksum of triplet packet
  */

 static int a3d_csum(char *data, int count)
 {
 	int i, csum = 0;

 	for (i = 0; i < count - 2; i++)
 		csum += data[i];
 	return (csum & 0x3f) != ((data[count - 2] << 3) | data[count - 1]);
 }

 static void a3d_read(struct a3d *a3d, unsigned char *data)
 {
 	struct input_dev *dev = a3d->dev;

 	switch (a3d->mode) {

 		case A3D_MODE_A3D:
 		case A3D_MODE_OEM:
 		case A3D_MODE_PAN:

 			input_report_rel(dev, REL_X, ((data[5] << 6) | (data[6] << 3) | data[ 7]) - ((data[5] & 4) << 7));
 			input_report_rel(dev, REL_Y, ((data[8] << 6) | (data[9] << 3) | data[10]) - ((data[8] & 4) << 7));

 			input_report_key(dev, BTN_RIGHT,  data[2] & 1);
 			input_report_key(dev, BTN_LEFT,   data[3] & 2);
 			input_report_key(dev, BTN_MIDDLE, data[3] & 4);

 			input_sync(dev);

 			a3d->axes[0] = ((signed char)((data[11] << 6) | (data[12] << 3) | (data[13]))) + 128;
 			a3d->axes[1] = ((signed char)((data[14] << 6) | (data[15] << 3) | (data[16]))) + 128;
 			a3d->axes[2] = ((signed char)((data[17] << 6) | (data[18] << 3) | (data[19]))) + 128;
 			a3d->axes[3] = ((signed char)((data[20] << 6) | (data[21] << 3) | (data[22]))) + 128;

 			a3d->buttons = ((data[3] << 3) | data[4]) & 0xf;

 			break;

 		case A3D_MODE_PXL:

 			input_report_rel(dev, REL_X, ((data[ 9] << 6) | (data[10] << 3) | data[11]) - ((data[ 9] & 4) << 7));
 			input_report_rel(dev, REL_Y, ((data[12] << 6) | (data[13] << 3) | data[14]) - ((data[12] & 4) << 7));

 			input_report_key(dev, BTN_RIGHT,  data[2] & 1);
 			input_report_key(dev, BTN_LEFT,   data[3] & 2);
 			input_report_key(dev, BTN_MIDDLE, data[3] & 4);
 			input_report_key(dev, BTN_SIDE,   data[7] & 2);
 			input_report_key(dev, BTN_EXTRA,  data[7] & 4);

 			input_report_abs(dev, ABS_X,        ((signed char)((data[15] << 6) | (data[16] << 3) | (data[17]))) + 128);
 			input_report_abs(dev, ABS_Y,        ((signed char)((data[18] << 6) | (data[19] << 3) | (data[20]))) + 128);
 			input_report_abs(dev, ABS_RUDDER,   ((signed char)((data[21] << 6) | (data[22] << 3) | (data[23]))) + 128);
 			input_report_abs(dev, ABS_THROTTLE, ((signed char)((data[24] << 6) | (data[25] << 3) | (data[26]))) + 128);

 			input_report_abs(dev, ABS_HAT0X, ( data[5]       & 1) - ((data[5] >> 2) & 1));
 			input_report_abs(dev, ABS_HAT0Y, ((data[5] >> 1) & 1) - ((data[6] >> 2) & 1));
 			input_report_abs(dev, ABS_HAT1X, ((data[4] >> 1) & 1) - ( data[3]       & 1));
 			input_report_abs(dev, ABS_HAT1Y, ((data[4] >> 2) & 1) - ( data[4]       & 1));

 			input_report_key(dev, BTN_TRIGGER, data[8] & 1);
 			input_report_key(dev, BTN_THUMB,   data[8] & 2);
 			input_report_key(dev, BTN_TOP,     data[8] & 4);
 			input_report_key(dev, BTN_PINKIE,  data[7] & 1);

 			input_sync(dev);

 			break;
 	}
 }


 /*
  * a3d_poll() reads and analyzes A3D joystick data.
  */

 static void a3d_poll(struct gameport *gameport)
 {
 	struct a3d *a3d = gameport_get_drvdata(gameport);
 	unsigned char data[A3D_MAX_LENGTH];

 	a3d->reads++;
 	if (a3d_read_packet(a3d->gameport, a3d->length, data) != a3d->length ||
 	    data[0] != a3d->mode || a3d_csum(data, a3d->length))
 		a3d->bads++;
 	else
 		a3d_read(a3d, data);
 }

 /*
  * a3d_adc_cooked_read() copies the acis and button data to the
  * callers arrays. It could do the read itself, but the caller could
  * call this more than 50 times a second, which would use too much CPU.
  */

 static int a3d_adc_cooked_read(struct gameport *gameport, int *axes, int *buttons)
 {
 	struct a3d *a3d = gameport->port_data;
 	int i;

 	for (i = 0; i < 4; i++)
 		axes[i] = (a3d->axes[i] < 254) ? a3d->axes[i] : -1;
 	*buttons = a3d->buttons;
 	return 0;
 }

 /*
  * a3d_adc_open() is the gameport open routine. It refuses to serve
  * any but cooked data.
  */

 static int a3d_adc_open(struct gameport *gameport, int mode)
 {
 	struct a3d *a3d = gameport->port_data;

 	if (mode != GAMEPORT_MODE_COOKED)
 		return -1;

 	gameport_start_polling(a3d->gameport);
 	return 0;
 }

 /*
  * a3d_adc_close() is a callback from the input close routine.
  */

 static void a3d_adc_close(struct gameport *gameport)
 {
 	struct a3d *a3d = gameport->port_data;

 	gameport_stop_polling(a3d->gameport);
 }

 /*
  * a3d_open() is a callback from the input open routine.
  */

 static int a3d_open(struct input_dev *dev)
 {
 	struct a3d *a3d = input_get_drvdata(dev);

 	gameport_start_polling(a3d->gameport);
 	return 0;
 }

 /*
  * a3d_close() is a callback from the input close routine.
  */

 static void a3d_close(struct input_dev *dev)
 {
 	struct a3d *a3d = input_get_drvdata(dev);

 	gameport_stop_polling(a3d->gameport);
 }

 /*
  * a3d_connect() probes for A3D joysticks.
  */

 static int a3d_connect(struct gameport *gameport, struct gameport_driver *drv)
 {
 	struct a3d *a3d;
 	struct input_dev *input_dev;
 	struct gameport *adc;
 	unsigned char data[A3D_MAX_LENGTH];
 	int i;
 	int err;

 	a3d = kzalloc(sizeof(struct a3d), GFP_KERNEL);
 	input_dev = input_allocate_device();
 	if (!a3d || !input_dev) {
 		err = -ENOMEM;
 		goto fail1;
 	}

 	a3d->dev = input_dev;
 	a3d->gameport = gameport;

 	gameport_set_drvdata(gameport, a3d);

 	err = gameport_open(gameport, drv, GAMEPORT_MODE_RAW);
 	if (err)
 		goto fail1;

 	i = a3d_read_packet(gameport, A3D_MAX_LENGTH, data);

 	if (!i || a3d_csum(data, i)) {
 		err = -ENODEV;
 		goto fail2;
 	}

 	a3d->mode = data[0];

 	if (!a3d->mode || a3d->mode > 5) {
 		printk(KERN_WARNING "a3d.c: Unknown A3D device detected "
 			"(%s, id=%d), contact <vojtech@ucw.cz>\n", gameport->phys, a3d->mode);
 		err = -ENODEV;
 		goto fail2;
 	}

 	gameport_set_poll_handler(gameport, a3d_poll);
 	gameport_set_poll_interval(gameport, 20);

 	snprintf(a3d->phys, sizeof(a3d->phys), "%s/input0", gameport->phys);

 	input_dev->name = a3d_names[a3d->mode];
 	input_dev->phys = a3d->phys;
 	input_dev->id.bustype = BUS_GAMEPORT;
 	input_dev->id.vendor = GAMEPORT_ID_VENDOR_MADCATZ;
 	input_dev->id.product = a3d->mode;
 	input_dev->id.version = 0x0100;
 	input_dev->dev.parent = &gameport->dev;
 	input_dev->open = a3d_open;
 	input_dev->close = a3d_close;

 	input_set_drvdata(input_dev, a3d);

 	if (a3d->mode == A3D_MODE_PXL) {

 		int axes[] = { ABS_X, ABS_Y, ABS_THROTTLE, ABS_RUDDER };

 		a3d->length = 33;

 		input_dev->evbit[0] |= BIT_MASK(EV_ABS) | BIT_MASK(EV_KEY) |
 			BIT_MASK(EV_REL);
 		input_dev->relbit[0] |= BIT_MASK(REL_X) | BIT_MASK(REL_Y);
 		input_dev->absbit[0] |= BIT_MASK(ABS_X) | BIT_MASK(ABS_Y) |
 			BIT_MASK(ABS_THROTTLE) | BIT_MASK(ABS_RUDDER) |
 			BIT_MASK(ABS_HAT0X) | BIT_MASK(ABS_HAT0Y) |
 			BIT_MASK(ABS_HAT1X) | BIT_MASK(ABS_HAT1Y);
 		input_dev->keybit[BIT_WORD(BTN_MOUSE)] |= BIT_MASK(BTN_RIGHT) |
 			BIT_MASK(BTN_LEFT) | BIT_MASK(BTN_MIDDLE) |
 			BIT_MASK(BTN_SIDE) | BIT_MASK(BTN_EXTRA);
 		input_dev->keybit[BIT_WORD(BTN_JOYSTICK)] |=
 			BIT_MASK(BTN_TRIGGER) | BIT_MASK(BTN_THUMB) |
 			BIT_MASK(BTN_TOP) | BIT_MASK(BTN_PINKIE);

 		a3d_read(a3d, data);

 		for (i = 0; i < 4; i++) {
 			if (i < 2)
 				input_set_abs_params(input_dev, axes[i],
 					48, input_abs_get_val(input_dev, axes[i]) * 2 - 48, 0, 8);
 			else
 				input_set_abs_params(input_dev, axes[i], 2, 253, 0, 0);
 			input_set_abs_params(input_dev, ABS_HAT0X + i, -1, 1, 0, 0);
 		}

 	} else {
 		a3d->length = 29;

 		input_dev->evbit[0] |= BIT_MASK(EV_KEY) | BIT_MASK(EV_REL);
 		input_dev->relbit[0] |= BIT_MASK(REL_X) | BIT_MASK(REL_Y);
 		input_dev->keybit[BIT_WORD(BTN_MOUSE)] |= BIT_MASK(BTN_RIGHT) |
 			BIT_MASK(BTN_LEFT) | BIT_MASK(BTN_MIDDLE);

 		a3d_read(a3d, data);

 		if (!(a3d->adc = adc = gameport_allocate_port()))
 			printk(KERN_ERR "a3d: Not enough memory for ADC port\n");
 		else {
 			adc->port_data = a3d;
 			adc->open = a3d_adc_open;
 			adc->close = a3d_adc_close;
 			adc->cooked_read = a3d_adc_cooked_read;
 			adc->fuzz = 1;

 			gameport_set_name(adc, a3d_names[a3d->mode]);
 			gameport_set_phys(adc, "%s/gameport0", gameport->phys);
 			adc->dev.parent = &gameport->dev;

 			gameport_register_port(adc);
 		}
 	}

 	err = input_register_device(a3d->dev);
 	if (err)
 		goto fail3;

 	return 0;

  fail3:	if (a3d->adc)
 		gameport_unregister_port(a3d->adc);
  fail2:	gameport_close(gameport);
  fail1:	gameport_set_drvdata(gameport, NULL);
 	input_free_device(input_dev);
 	kfree(a3d);
 	return err;
 }

 static void a3d_disconnect(struct gameport *gameport)
 {
 	struct a3d *a3d = gameport_get_drvdata(gameport);

 	input_unregister_device(a3d->dev);
 	if (a3d->adc)
 		gameport_unregister_port(a3d->adc);
 	gameport_close(gameport);
 	gameport_set_drvdata(gameport, NULL);
 	kfree(a3d);
 }

 static struct gameport_driver a3d_drv = {
 	.driver		= {
 		.name	= "adc",
 		.owner	= THIS_MODULE,
 	},
 	.description	= DRIVER_DESC,
 	.connect	= a3d_connect,
 	.disconnect	= a3d_disconnect,
 };

 module_gameport_driver(a3d_drv);
	/*
	* Copyright (c) 1998-2001 Vojtech Pavlik
	*/

	/*
	* FP-Gaming Assassin 3D joystick driver for Linux
	*/

	/*
	* This program is free software; you can redistribute it and/or modify
	* it under the terms of the GNU General Public License as published by
	* the Free Software Foundation; either version 2 of the License, or
	* (at your option) any later version.
	*
	* This program is distributed in the hope that it will be useful,
	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	* GNU General Public License for more details.
	*
	* You should have received a copy of the GNU General Public License
	* along with this program; if not, write to the Free Software
	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
	*
	* Should you need to contact me, the author, you can do so either by
	* e-mail - mail your message to <vojtech@ucw.cz>, or by paper mail:
	* Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic
	*/

	#include <linux/kernel.h>
	#include <linux/module.h>
	#include <linux/slab.h>
	#include <linux/gameport.h>
	#include <linux/input.h>
	#include <linux/jiffies.h>

	#define DRIVER_DESC "FP-Gaming Assassin 3D joystick driver"

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

	#define A3D_MAX_START 600 /* 600 us */
	#define A3D_MAX_STROBE 80 /* 80 us */
	#define A3D_MAX_LENGTH 40 /* 403 bits /

	#define A3D_MODE_A3D 1 /* Assassin 3D */
	#define A3D_MODE_PAN 2 /* Panther */
	#define A3D_MODE_OEM 3 /* Panther OEM version */
	#define A3D_MODE_PXL 4 /* Panther XL */

	static char *a3d_names[] = { NULL, "FP-Gaming Assassin 3D", "MadCatz Panther", "OEM Panther",
	"MadCatz Panther XL", "MadCatz Panther XL w/ rudder" };

	struct a3d {
	struct gameport *gameport;
	struct gameport *adc;
	struct input_dev *dev;
	int axes[4];
	int buttons;
	int mode;
	int length;
	int reads;
	int bads;
	char phys[32];
	};

	/*
	* a3d_read_packet() reads an Assassin 3D packet.
	*/

	static int a3d_read_packet(struct gameport gameport, int length, char data)
	{
	unsigned long flags;
	unsigned char u, v;
	unsigned int t, s;
	int i;

	i = 0;
	t = gameport_time(gameport, A3D_MAX_START);
	s = gameport_time(gameport, A3D_MAX_STROBE);

	local_irq_save(flags);
	gameport_trigger(gameport);
	v = gameport_read(gameport);

	while (t > 0 && i < length) {
	t--;
	u = v; v = gameport_read(gameport);
	if (~v & u & 0x10) {
	data[i++] = v >> 5;
	t = s;
	}
	}

	local_irq_restore(flags);

	return i;
	}

	/*
	* a3d_csum() computes checksum of triplet packet
	*/

	static int a3d_csum(char *data, int count)
	{
	int i, csum = 0;

	for (i = 0; i < count - 2; i++)
	csum += data[i];
	return (csum & 0x3f) != ((data[count - 2] << 3) \| data[count - 1]);
	}

	static void a3d_read(struct a3d a3d, unsigned char data)
	{
	struct input_dev *dev = a3d->dev;

	switch (a3d->mode) {

	case A3D_MODE_A3D:
	case A3D_MODE_OEM:
	case A3D_MODE_PAN:

	input_report_rel(dev, REL_X, ((data[5] << 6) \| (data[6] << 3) \| data[ 7]) - ((data[5] & 4) << 7));
	input_report_rel(dev, REL_Y, ((data[8] << 6) \| (data[9] << 3) \| data[10]) - ((data[8] & 4) << 7));

	input_report_key(dev, BTN_RIGHT, data[2] & 1);
	input_report_key(dev, BTN_LEFT, data[3] & 2);
	input_report_key(dev, BTN_MIDDLE, data[3] & 4);

	input_sync(dev);

	a3d->axes[0] = ((signed char)((data[11] << 6) \| (data[12] << 3) \| (data[13]))) + 128;
	a3d->axes[1] = ((signed char)((data[14] << 6) \| (data[15] << 3) \| (data[16]))) + 128;
	a3d->axes[2] = ((signed char)((data[17] << 6) \| (data[18] << 3) \| (data[19]))) + 128;
	a3d->axes[3] = ((signed char)((data[20] << 6) \| (data[21] << 3) \| (data[22]))) + 128;

	a3d->buttons = ((data[3] << 3) \| data[4]) & 0xf;

	break;

	case A3D_MODE_PXL:

	input_report_rel(dev, REL_X, ((data[ 9] << 6) \| (data[10] << 3) \| data[11]) - ((data[ 9] & 4) << 7));
	input_report_rel(dev, REL_Y, ((data[12] << 6) \| (data[13] << 3) \| data[14]) - ((data[12] & 4) << 7));

	input_report_key(dev, BTN_RIGHT, data[2] & 1);
	input_report_key(dev, BTN_LEFT, data[3] & 2);
	input_report_key(dev, BTN_MIDDLE, data[3] & 4);
	input_report_key(dev, BTN_SIDE, data[7] & 2);
	input_report_key(dev, BTN_EXTRA, data[7] & 4);

	input_report_abs(dev, ABS_X, ((signed char)((data[15] << 6) \| (data[16] << 3) \| (data[17]))) + 128);
	input_report_abs(dev, ABS_Y, ((signed char)((data[18] << 6) \| (data[19] << 3) \| (data[20]))) + 128);
	input_report_abs(dev, ABS_RUDDER, ((signed char)((data[21] << 6) \| (data[22] << 3) \| (data[23]))) + 128);
	input_report_abs(dev, ABS_THROTTLE, ((signed char)((data[24] << 6) \| (data[25] << 3) \| (data[26]))) + 128);

	input_report_abs(dev, ABS_HAT0X, ( data[5] & 1) - ((data[5] >> 2) & 1));
	input_report_abs(dev, ABS_HAT0Y, ((data[5] >> 1) & 1) - ((data[6] >> 2) & 1));
	input_report_abs(dev, ABS_HAT1X, ((data[4] >> 1) & 1) - ( data[3] & 1));
	input_report_abs(dev, ABS_HAT1Y, ((data[4] >> 2) & 1) - ( data[4] & 1));

	input_report_key(dev, BTN_TRIGGER, data[8] & 1);
	input_report_key(dev, BTN_THUMB, data[8] & 2);
	input_report_key(dev, BTN_TOP, data[8] & 4);
	input_report_key(dev, BTN_PINKIE, data[7] & 1);

	input_sync(dev);

	break;
	}
	}


	/*
	* a3d_poll() reads and analyzes A3D joystick data.
	*/

	static void a3d_poll(struct gameport *gameport)
	{
	struct a3d *a3d = gameport_get_drvdata(gameport);
	unsigned char data[A3D_MAX_LENGTH];

	a3d->reads++;
	if (a3d_read_packet(a3d->gameport, a3d->length, data) != a3d->length \|\|
	data[0] != a3d->mode \|\| a3d_csum(data, a3d->length))
	a3d->bads++;
	else
	a3d_read(a3d, data);
	}

	/*
	* a3d_adc_cooked_read() copies the acis and button data to the
	* callers arrays. It could do the read itself, but the caller could
	* call this more than 50 times a second, which would use too much CPU.
	*/

	static int a3d_adc_cooked_read(struct gameport gameport, int axes, int *buttons)
	{
	struct a3d *a3d = gameport->port_data;
	int i;

	for (i = 0; i < 4; i++)
	axes[i] = (a3d->axes[i] < 254) ? a3d->axes[i] : -1;
	*buttons = a3d->buttons;
	return 0;
	}

	/*
	* a3d_adc_open() is the gameport open routine. It refuses to serve
	* any but cooked data.
	*/

	static int a3d_adc_open(struct gameport *gameport, int mode)
	{
	struct a3d *a3d = gameport->port_data;

	if (mode != GAMEPORT_MODE_COOKED)
	return -1;

	gameport_start_polling(a3d->gameport);
	return 0;
	}

	/*
	* a3d_adc_close() is a callback from the input close routine.
	*/

	static void a3d_adc_close(struct gameport *gameport)
	{
	struct a3d *a3d = gameport->port_data;

	gameport_stop_polling(a3d->gameport);
	}

	/*
	* a3d_open() is a callback from the input open routine.
	*/

	static int a3d_open(struct input_dev *dev)
	{
	struct a3d *a3d = input_get_drvdata(dev);

	gameport_start_polling(a3d->gameport);
	return 0;
	}

	/*
	* a3d_close() is a callback from the input close routine.
	*/

	static void a3d_close(struct input_dev *dev)
	{
	struct a3d *a3d = input_get_drvdata(dev);

	gameport_stop_polling(a3d->gameport);
	}

	/*
	* a3d_connect() probes for A3D joysticks.
	*/

	static int a3d_connect(struct gameport gameport, struct gameport_driver drv)
	{
	struct a3d *a3d;
	struct input_dev *input_dev;
	struct gameport *adc;
	unsigned char data[A3D_MAX_LENGTH];
	int i;
	int err;

	a3d = kzalloc(sizeof(struct a3d), GFP_KERNEL);
	input_dev = input_allocate_device();
	if (!a3d \|\| !input_dev) {
	err = -ENOMEM;
	goto fail1;
	}

	a3d->dev = input_dev;
	a3d->gameport = gameport;

	gameport_set_drvdata(gameport, a3d);

	err = gameport_open(gameport, drv, GAMEPORT_MODE_RAW);
	if (err)
	goto fail1;

	i = a3d_read_packet(gameport, A3D_MAX_LENGTH, data);

	if (!i \|\| a3d_csum(data, i)) {
	err = -ENODEV;
	goto fail2;
	}

	a3d->mode = data[0];

	if (!a3d->mode \|\| a3d->mode > 5) {
	printk(KERN_WARNING "a3d.c: Unknown A3D device detected "
	"(%s, id=%d), contact <vojtech@ucw.cz>\n", gameport->phys, a3d->mode);
	err = -ENODEV;
	goto fail2;
	}

	gameport_set_poll_handler(gameport, a3d_poll);
	gameport_set_poll_interval(gameport, 20);

	snprintf(a3d->phys, sizeof(a3d->phys), "%s/input0", gameport->phys);

	input_dev->name = a3d_names[a3d->mode];
	input_dev->phys = a3d->phys;
	input_dev->id.bustype = BUS_GAMEPORT;
	input_dev->id.vendor = GAMEPORT_ID_VENDOR_MADCATZ;
	input_dev->id.product = a3d->mode;
	input_dev->id.version = 0x0100;
	input_dev->dev.parent = &gameport->dev;
	input_dev->open = a3d_open;
	input_dev->close = a3d_close;

	input_set_drvdata(input_dev, a3d);

	if (a3d->mode == A3D_MODE_PXL) {

	int axes[] = { ABS_X, ABS_Y, ABS_THROTTLE, ABS_RUDDER };

	a3d->length = 33;

	input_dev->evbit[0] \|= BIT_MASK(EV_ABS) \| BIT_MASK(EV_KEY) \|
	BIT_MASK(EV_REL);
	input_dev->relbit[0] \|= BIT_MASK(REL_X) \| BIT_MASK(REL_Y);
	input_dev->absbit[0] \|= BIT_MASK(ABS_X) \| BIT_MASK(ABS_Y) \|
	BIT_MASK(ABS_THROTTLE) \| BIT_MASK(ABS_RUDDER) \|
	BIT_MASK(ABS_HAT0X) \| BIT_MASK(ABS_HAT0Y) \|
	BIT_MASK(ABS_HAT1X) \| BIT_MASK(ABS_HAT1Y);
	input_dev->keybit[BIT_WORD(BTN_MOUSE)] \|= BIT_MASK(BTN_RIGHT) \|
	BIT_MASK(BTN_LEFT) \| BIT_MASK(BTN_MIDDLE) \|
	BIT_MASK(BTN_SIDE) \| BIT_MASK(BTN_EXTRA);
	input_dev->keybit[BIT_WORD(BTN_JOYSTICK)] \|=
	BIT_MASK(BTN_TRIGGER) \| BIT_MASK(BTN_THUMB) \|
	BIT_MASK(BTN_TOP) \| BIT_MASK(BTN_PINKIE);

	a3d_read(a3d, data);

	for (i = 0; i < 4; i++) {
	if (i < 2)
	input_set_abs_params(input_dev, axes[i],
	48, input_abs_get_val(input_dev, axes[i]) * 2 - 48, 0, 8);
	else
	input_set_abs_params(input_dev, axes[i], 2, 253, 0, 0);
	input_set_abs_params(input_dev, ABS_HAT0X + i, -1, 1, 0, 0);
	}

	} else {
	a3d->length = 29;

	input_dev->evbit[0] \|= BIT_MASK(EV_KEY) \| BIT_MASK(EV_REL);
	input_dev->relbit[0] \|= BIT_MASK(REL_X) \| BIT_MASK(REL_Y);
	input_dev->keybit[BIT_WORD(BTN_MOUSE)] \|= BIT_MASK(BTN_RIGHT) \|
	BIT_MASK(BTN_LEFT) \| BIT_MASK(BTN_MIDDLE);

	a3d_read(a3d, data);

	if (!(a3d->adc = adc = gameport_allocate_port()))
	printk(KERN_ERR "a3d: Not enough memory for ADC port\n");
	else {
	adc->port_data = a3d;
	adc->open = a3d_adc_open;
	adc->close = a3d_adc_close;
	adc->cooked_read = a3d_adc_cooked_read;
	adc->fuzz = 1;

	gameport_set_name(adc, a3d_names[a3d->mode]);
	gameport_set_phys(adc, "%s/gameport0", gameport->phys);
	adc->dev.parent = &gameport->dev;

	gameport_register_port(adc);
	}
	}

	err = input_register_device(a3d->dev);
	if (err)
	goto fail3;

	return 0;

	fail3: if (a3d->adc)
	gameport_unregister_port(a3d->adc);
	fail2: gameport_close(gameport);
	fail1: gameport_set_drvdata(gameport, NULL);
	input_free_device(input_dev);
	kfree(a3d);
	return err;
	}

	static void a3d_disconnect(struct gameport *gameport)
	{
	struct a3d *a3d = gameport_get_drvdata(gameport);

	input_unregister_device(a3d->dev);
	if (a3d->adc)
	gameport_unregister_port(a3d->adc);
	gameport_close(gameport);
	gameport_set_drvdata(gameport, NULL);
	kfree(a3d);
	}

	static struct gameport_driver a3d_drv = {
	.driver = {
	.name = "adc",
	.owner = THIS_MODULE,
	},
	.description = DRIVER_DESC,
	.connect = a3d_connect,
	.disconnect = a3d_disconnect,
	};

	module_gameport_driver(a3d_drv);