[mirror_ubuntu-bionic-kernel.git] / drivers / input / joystick / grip.c

/*
 * $Id: grip.c,v 1.21 2002/01/22 20:27:57 vojtech Exp $
 *
 *  Copyright (c) 1998-2001 Vojtech Pavlik
 */

/*
 * Gravis/Kensington GrIP protocol joystick and gamepad 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/init.h>
#include <linux/slab.h>
#include <linux/gameport.h>
#include <linux/input.h>
#include <linux/jiffies.h>

#define DRIVER_DESC	"Gravis GrIP protocol joystick driver"

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

#define GRIP_MODE_GPP		1
#define GRIP_MODE_BD		2
#define GRIP_MODE_XT		3
#define GRIP_MODE_DC		4

#define GRIP_LENGTH_GPP		24
#define GRIP_STROBE_GPP		200	/* 200 us */
#define GRIP_LENGTH_XT		4
#define GRIP_STROBE_XT		64	/* 64 us */
#define GRIP_MAX_CHUNKS_XT	10
#define GRIP_MAX_BITS_XT	30

struct grip {
	struct gameport *gameport;
	struct input_dev *dev[2];
	unsigned char mode[2];
	int reads;
	int bads;
	char phys[2][32];
};

static int grip_btn_gpp[] = { BTN_START, BTN_SELECT, BTN_TR2, BTN_Y, 0, BTN_TL2, BTN_A, BTN_B, BTN_X, 0, BTN_TL, BTN_TR, -1 };
static int grip_btn_bd[] = { BTN_THUMB, BTN_THUMB2, BTN_TRIGGER, BTN_TOP, BTN_BASE, -1 };
static int grip_btn_xt[] = { BTN_TRIGGER, BTN_THUMB, BTN_A, BTN_B, BTN_C, BTN_X, BTN_Y, BTN_Z, BTN_SELECT, BTN_START, BTN_MODE, -1 };
static int grip_btn_dc[] = { BTN_TRIGGER, BTN_THUMB, BTN_TOP, BTN_TOP2, BTN_BASE, BTN_BASE2, BTN_BASE3, BTN_BASE4, BTN_BASE5, -1 };

static int grip_abs_gpp[] = { ABS_X, ABS_Y, -1 };
static int grip_abs_bd[] = { ABS_X, ABS_Y, ABS_THROTTLE, ABS_HAT0X, ABS_HAT0Y, -1 };
static int grip_abs_xt[] = { ABS_X, ABS_Y, ABS_BRAKE, ABS_GAS, ABS_THROTTLE, ABS_HAT0X, ABS_HAT0Y, ABS_HAT1X, ABS_HAT1Y, -1 };
static int grip_abs_dc[] = { ABS_X, ABS_Y, ABS_RX, ABS_RY, ABS_THROTTLE, ABS_HAT0X, ABS_HAT0Y, -1 };

static char *grip_name[] = { NULL, "Gravis GamePad Pro", "Gravis Blackhawk Digital",
				"Gravis Xterminator Digital", "Gravis Xterminator DualControl" };
static int *grip_abs[] = { NULL, grip_abs_gpp, grip_abs_bd, grip_abs_xt, grip_abs_dc };
static int *grip_btn[] = { NULL, grip_btn_gpp, grip_btn_bd, grip_btn_xt, grip_btn_dc };
static char grip_anx[] = { 0, 0, 3, 5, 5 };
static char grip_cen[] = { 0, 0, 2, 2, 4 };

/*
 * grip_gpp_read_packet() reads a Gravis GamePad Pro packet.
 */

static int grip_gpp_read_packet(struct gameport *gameport, int shift, unsigned int *data)
{
	unsigned long flags;
	unsigned char u, v;
	unsigned int t;
	int i;

	int strobe = gameport_time(gameport, GRIP_STROBE_GPP);

	data[0] = 0;
	t = strobe;
	i = 0;

	local_irq_save(flags);

	v = gameport_read(gameport) >> shift;

	do {
		t--;
		u = v; v = (gameport_read(gameport) >> shift) & 3;
		if (~v & u & 1) {
			data[0] |= (v >> 1) << i++;
			t = strobe;
		}
	} while (i < GRIP_LENGTH_GPP && t > 0);

	local_irq_restore(flags);

	if (i < GRIP_LENGTH_GPP) return -1;

	for (i = 0; i < GRIP_LENGTH_GPP && (data[0] & 0xfe4210) ^ 0x7c0000; i++)
		data[0] = data[0] >> 1 | (data[0] & 1) << (GRIP_LENGTH_GPP - 1);

	return -(i == GRIP_LENGTH_GPP);
}

/*
 * grip_xt_read_packet() reads a Gravis Xterminator packet.
 */

static int grip_xt_read_packet(struct gameport *gameport, int shift, unsigned int *data)
{
	unsigned int i, j, buf, crc;
	unsigned char u, v, w;
	unsigned long flags;
	unsigned int t;
	char status;

	int strobe = gameport_time(gameport, GRIP_STROBE_XT);

	data[0] = data[1] = data[2] = data[3] = 0;
	status = buf = i = j = 0;
	t = strobe;

	local_irq_save(flags);

	v = w = (gameport_read(gameport) >> shift) & 3;

	do {
		t--;
		u = (gameport_read(gameport) >> shift) & 3;

		if (u ^ v) {

			if ((u ^ v) & 1) {
				buf = (buf << 1) | (u >> 1);
				t = strobe;
				i++;
			} else

			if ((((u ^ v) & (v ^ w)) >> 1) & ~(u | v | w) & 1) {
				if (i == 20) {
					crc = buf ^ (buf >> 7) ^ (buf >> 14);
					if (!((crc ^ (0x25cb9e70 >> ((crc >> 2) & 0x1c))) & 0xf)) {
						data[buf >> 18] = buf >> 4;
						status |= 1 << (buf >> 18);
					}
					j++;
				}
				t = strobe;
				buf = 0;
				i = 0;
			}
			w = v;
			v = u;
		}

	} while (status != 0xf && i < GRIP_MAX_BITS_XT && j < GRIP_MAX_CHUNKS_XT && t > 0);

	local_irq_restore(flags);

	return -(status != 0xf);
}

/*
 * grip_timer() repeatedly polls the joysticks and generates events.
 */

static void grip_poll(struct gameport *gameport)
{
	struct grip *grip = gameport_get_drvdata(gameport);
	unsigned int data[GRIP_LENGTH_XT];
	struct input_dev *dev;
	int i, j;

	for (i = 0; i < 2; i++) {

		dev = grip->dev[i];
		if (!dev)
			continue;

		grip->reads++;

		switch (grip->mode[i]) {

			case GRIP_MODE_GPP:

				if (grip_gpp_read_packet(grip->gameport, (i << 1) + 4, data)) {
					grip->bads++;
					break;
				}

				input_report_abs(dev, ABS_X, ((*data >> 15) & 1) - ((*data >> 16) & 1));
				input_report_abs(dev, ABS_Y, ((*data >> 13) & 1) - ((*data >> 12) & 1));

				for (j = 0; j < 12; j++)
					if (grip_btn_gpp[j])
						input_report_key(dev, grip_btn_gpp[j], (*data >> j) & 1);

				break;

			case GRIP_MODE_BD:

				if (grip_xt_read_packet(grip->gameport, (i << 1) + 4, data)) {
					grip->bads++;
					break;
				}

				input_report_abs(dev, ABS_X,        (data[0] >> 2) & 0x3f);
				input_report_abs(dev, ABS_Y,  63 - ((data[0] >> 8) & 0x3f));
				input_report_abs(dev, ABS_THROTTLE, (data[2] >> 8) & 0x3f);

				input_report_abs(dev, ABS_HAT0X, ((data[2] >> 1) & 1) - ( data[2]       & 1));
				input_report_abs(dev, ABS_HAT0Y, ((data[2] >> 2) & 1) - ((data[2] >> 3) & 1));

				for (j = 0; j < 5; j++)
					input_report_key(dev, grip_btn_bd[j], (data[3] >> (j + 4)) & 1);

				break;

			case GRIP_MODE_XT:

				if (grip_xt_read_packet(grip->gameport, (i << 1) + 4, data)) {
					grip->bads++;
					break;
				}

				input_report_abs(dev, ABS_X,        (data[0] >> 2) & 0x3f);
				input_report_abs(dev, ABS_Y,  63 - ((data[0] >> 8) & 0x3f));
				input_report_abs(dev, ABS_BRAKE,    (data[1] >> 2) & 0x3f);
				input_report_abs(dev, ABS_GAS,	    (data[1] >> 8) & 0x3f);
				input_report_abs(dev, ABS_THROTTLE, (data[2] >> 8) & 0x3f);

				input_report_abs(dev, ABS_HAT0X, ((data[2] >> 1) & 1) - ( data[2]       & 1));
				input_report_abs(dev, ABS_HAT0Y, ((data[2] >> 2) & 1) - ((data[2] >> 3) & 1));
				input_report_abs(dev, ABS_HAT1X, ((data[2] >> 5) & 1) - ((data[2] >> 4) & 1));
				input_report_abs(dev, ABS_HAT1Y, ((data[2] >> 6) & 1) - ((data[2] >> 7) & 1));

				for (j = 0; j < 11; j++)
					input_report_key(dev, grip_btn_xt[j], (data[3] >> (j + 3)) & 1);
				break;

			case GRIP_MODE_DC:

				if (grip_xt_read_packet(grip->gameport, (i << 1) + 4, data)) {
					grip->bads++;
					break;
				}

				input_report_abs(dev, ABS_X,        (data[0] >> 2) & 0x3f);
				input_report_abs(dev, ABS_Y,        (data[0] >> 8) & 0x3f);
				input_report_abs(dev, ABS_RX,       (data[1] >> 2) & 0x3f);
				input_report_abs(dev, ABS_RY,	    (data[1] >> 8) & 0x3f);
				input_report_abs(dev, ABS_THROTTLE, (data[2] >> 8) & 0x3f);

				input_report_abs(dev, ABS_HAT0X, ((data[2] >> 1) & 1) - ( data[2]       & 1));
				input_report_abs(dev, ABS_HAT0Y, ((data[2] >> 2) & 1) - ((data[2] >> 3) & 1));

				for (j = 0; j < 9; j++)
					input_report_key(dev, grip_btn_dc[j], (data[3] >> (j + 3)) & 1);
				break;


		}

		input_sync(dev);
	}
}

static int grip_open(struct input_dev *dev)
{
	struct grip *grip = input_get_drvdata(dev);

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

static void grip_close(struct input_dev *dev)
{
	struct grip *grip = input_get_drvdata(dev);

	gameport_stop_polling(grip->gameport);
}

static int grip_connect(struct gameport *gameport, struct gameport_driver *drv)
{
	struct grip *grip;
	struct input_dev *input_dev;
	unsigned int data[GRIP_LENGTH_XT];
	int i, j, t;
	int err;

	if (!(grip = kzalloc(sizeof(struct grip), GFP_KERNEL)))
		return -ENOMEM;

	grip->gameport = gameport;

	gameport_set_drvdata(gameport, grip);

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

	for (i = 0; i < 2; i++) {
		if (!grip_gpp_read_packet(gameport, (i << 1) + 4, data)) {
			grip->mode[i] = GRIP_MODE_GPP;
			continue;
		}
		if (!grip_xt_read_packet(gameport, (i << 1) + 4, data)) {
			if (!(data[3] & 7)) {
				grip->mode[i] = GRIP_MODE_BD;
				continue;
			}
			if (!(data[2] & 0xf0)) {
				grip->mode[i] = GRIP_MODE_XT;
				continue;
			}
			grip->mode[i] = GRIP_MODE_DC;
			continue;
		}
	}

	if (!grip->mode[0] && !grip->mode[1]) {
		err = -ENODEV;
		goto fail2;
	}

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

	for (i = 0; i < 2; i++) {
		if (!grip->mode[i])
			continue;

		grip->dev[i] = input_dev = input_allocate_device();
		if (!input_dev) {
			err = -ENOMEM;
			goto fail3;
		}

		snprintf(grip->phys[i], sizeof(grip->phys[i]),
			 "%s/input%d", gameport->phys, i);

		input_dev->name = grip_name[grip->mode[i]];
		input_dev->phys = grip->phys[i];
		input_dev->id.bustype = BUS_GAMEPORT;
		input_dev->id.vendor = GAMEPORT_ID_VENDOR_GRAVIS;
		input_dev->id.product = grip->mode[i];
		input_dev->id.version = 0x0100;
		input_dev->dev.parent = &gameport->dev;

		input_set_drvdata(input_dev, grip);

		input_dev->open = grip_open;
		input_dev->close = grip_close;

		input_dev->evbit[0] = BIT(EV_KEY) | BIT(EV_ABS);

		for (j = 0; (t = grip_abs[grip->mode[i]][j]) >= 0; j++) {

			if (j < grip_cen[grip->mode[i]])
				input_set_abs_params(input_dev, t, 14, 52, 1, 2);
			else if (j < grip_anx[grip->mode[i]])
				input_set_abs_params(input_dev, t, 3, 57, 1, 0);
			else
				input_set_abs_params(input_dev, t, -1, 1, 0, 0);
		}

		for (j = 0; (t = grip_btn[grip->mode[i]][j]) >= 0; j++)
			if (t > 0)
				set_bit(t, input_dev->keybit);

		err = input_register_device(grip->dev[i]);
		if (err)
			goto fail4;
	}

	return 0;

 fail4:	input_free_device(grip->dev[i]);
 fail3:	while (--i >= 0)
		if (grip->dev[i])
			input_unregister_device(grip->dev[i]);
 fail2:	gameport_close(gameport);
 fail1:	gameport_set_drvdata(gameport, NULL);
	kfree(grip);
	return err;
}

static void grip_disconnect(struct gameport *gameport)
{
	struct grip *grip = gameport_get_drvdata(gameport);
	int i;

	for (i = 0; i < 2; i++)
		if (grip->dev[i])
			input_unregister_device(grip->dev[i]);
	gameport_close(gameport);
	gameport_set_drvdata(gameport, NULL);
	kfree(grip);
}

static struct gameport_driver grip_drv = {
	.driver		= {
		.name	= "grip",
		.owner	= THIS_MODULE,
	},
	.description	= DRIVER_DESC,
	.connect	= grip_connect,
	.disconnect	= grip_disconnect,
};

static int __init grip_init(void)
{
	gameport_register_driver(&grip_drv);
	return 0;
}

static void __exit grip_exit(void)
{
	gameport_unregister_driver(&grip_drv);
}

module_init(grip_init);
module_exit(grip_exit);
Commit	Line	Data
1da177e4 LT	1	/*
	2	* $Id: grip.c,v 1.21 2002/01/22 20:27:57 vojtech Exp $
	3	*
	4	* Copyright (c) 1998-2001 Vojtech Pavlik
	5	*/
	6
	7	/*
	8	* Gravis/Kensington GrIP protocol joystick and gamepad driver for Linux
	9	*/
	10
	11	/*
	12	* This program is free software; you can redistribute it and/or modify
	13	* it under the terms of the GNU General Public License as published by
	14	* the Free Software Foundation; either version 2 of the License, or
	15	* (at your option) any later version.
	16	*
	17	* This program is distributed in the hope that it will be useful,
	18	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	19	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	20	* GNU General Public License for more details.
	21	*
	22	* You should have received a copy of the GNU General Public License
	23	* along with this program; if not, write to the Free Software
	24	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
	25	*
	26	* Should you need to contact me, the author, you can do so either by
	27	* e-mail - mail your message to <vojtech@ucw.cz>, or by paper mail:
	28	* Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic
	29	*/
	30
	31	#include <linux/kernel.h>
	32	#include <linux/module.h>
	33	#include <linux/init.h>
	34	#include <linux/slab.h>
	35	#include <linux/gameport.h>
	36	#include <linux/input.h>
4e57b681	37	#include <linux/jiffies.h>
1da177e4 LT	38
	39	#define DRIVER_DESC "Gravis GrIP protocol joystick driver"
	40
	41	MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
	42	MODULE_DESCRIPTION(DRIVER_DESC);
	43	MODULE_LICENSE("GPL");
	44
	45	#define GRIP_MODE_GPP 1
	46	#define GRIP_MODE_BD 2
	47	#define GRIP_MODE_XT 3
	48	#define GRIP_MODE_DC 4
	49
	50	#define GRIP_LENGTH_GPP 24
	51	#define GRIP_STROBE_GPP 200 /* 200 us */
	52	#define GRIP_LENGTH_XT 4
	53	#define GRIP_STROBE_XT 64 /* 64 us */
	54	#define GRIP_MAX_CHUNKS_XT 10
	55	#define GRIP_MAX_BITS_XT 30
	56
	57	struct grip {
	58	struct gameport *gameport;
17dd3f0f	59	struct input_dev *dev[2];
1da177e4 LT	60	unsigned char mode[2];
	61	int reads;
	62	int bads;
	63	char phys[2][32];
	64	};
	65
	66	static int grip_btn_gpp[] = { BTN_START, BTN_SELECT, BTN_TR2, BTN_Y, 0, BTN_TL2, BTN_A, BTN_B, BTN_X, 0, BTN_TL, BTN_TR, -1 };
	67	static int grip_btn_bd[] = { BTN_THUMB, BTN_THUMB2, BTN_TRIGGER, BTN_TOP, BTN_BASE, -1 };
	68	static int grip_btn_xt[] = { BTN_TRIGGER, BTN_THUMB, BTN_A, BTN_B, BTN_C, BTN_X, BTN_Y, BTN_Z, BTN_SELECT, BTN_START, BTN_MODE, -1 };
	69	static int grip_btn_dc[] = { BTN_TRIGGER, BTN_THUMB, BTN_TOP, BTN_TOP2, BTN_BASE, BTN_BASE2, BTN_BASE3, BTN_BASE4, BTN_BASE5, -1 };
	70
	71	static int grip_abs_gpp[] = { ABS_X, ABS_Y, -1 };
	72	static int grip_abs_bd[] = { ABS_X, ABS_Y, ABS_THROTTLE, ABS_HAT0X, ABS_HAT0Y, -1 };
	73	static int grip_abs_xt[] = { ABS_X, ABS_Y, ABS_BRAKE, ABS_GAS, ABS_THROTTLE, ABS_HAT0X, ABS_HAT0Y, ABS_HAT1X, ABS_HAT1Y, -1 };
	74	static int grip_abs_dc[] = { ABS_X, ABS_Y, ABS_RX, ABS_RY, ABS_THROTTLE, ABS_HAT0X, ABS_HAT0Y, -1 };
	75
	76	static char *grip_name[] = { NULL, "Gravis GamePad Pro", "Gravis Blackhawk Digital",
	77	"Gravis Xterminator Digital", "Gravis Xterminator DualControl" };
	78	static int *grip_abs[] = { NULL, grip_abs_gpp, grip_abs_bd, grip_abs_xt, grip_abs_dc };
	79	static int *grip_btn[] = { NULL, grip_btn_gpp, grip_btn_bd, grip_btn_xt, grip_btn_dc };
	80	static char grip_anx[] = { 0, 0, 3, 5, 5 };
	81	static char grip_cen[] = { 0, 0, 2, 2, 4 };
	82
	83	/*
	84	* grip_gpp_read_packet() reads a Gravis GamePad Pro packet.
	85	*/
	86
	87	static int grip_gpp_read_packet(struct gameport gameport, int shift, unsigned int data)
	88	{
	89	unsigned long flags;
	90	unsigned char u, v;
	91	unsigned int t;
	92	int i;
	93
	94	int strobe = gameport_time(gameport, GRIP_STROBE_GPP);
	95
	96	data[0] = 0;
	97	t = strobe;
	98	i = 0;
	99
	100	local_irq_save(flags);
	101
	102	v = gameport_read(gameport) >> shift;
	103
	104	do {
	105	t--;
	106	u = v; v = (gameport_read(gameport) >> shift) & 3;
	107	if (~v & u & 1) {
	108	data[0] \|= (v >> 1) << i++;
	109	t = strobe;
	110	}
	111	} while (i < GRIP_LENGTH_GPP && t > 0);
	112
	113	local_irq_restore(flags);
	114
	115	if (i < GRIP_LENGTH_GPP) return -1;
	116
	117	for (i = 0; i < GRIP_LENGTH_GPP && (data[0] & 0xfe4210) ^ 0x7c0000; i++)
	118	data[0] = data[0] >> 1 \| (data[0] & 1) << (GRIP_LENGTH_GPP - 1);
	119
	120	return -(i == GRIP_LENGTH_GPP);
	121	}
	122
	123	/*
124	* grip_xt_read_packet() reads a Gravis Xterminator packet.
125	*/
126
127	static int grip_xt_read_packet(struct gameport gameport, int shift, unsigned int data)
128	{
129	unsigned int i, j, buf, crc;
130	unsigned char u, v, w;
131	unsigned long flags;
132	unsigned int t;
133	char status;
134
135	int strobe = gameport_time(gameport, GRIP_STROBE_XT);
136
137	data[0] = data[1] = data[2] = data[3] = 0;
138	status = buf = i = j = 0;
139	t = strobe;
140
141	local_irq_save(flags);
142
143	v = w = (gameport_read(gameport) >> shift) & 3;
144
145	do {
146	t--;
147	u = (gameport_read(gameport) >> shift) & 3;
148
149	if (u ^ v) {
150
151	if ((u ^ v) & 1) {
152	buf = (buf << 1) \| (u >> 1);
153	t = strobe;
154	i++;
155	} else
156
157	if ((((u ^ v) & (v ^ w)) >> 1) & ~(u \| v \| w) & 1) {
158	if (i == 20) {
159	crc = buf ^ (buf >> 7) ^ (buf >> 14);
160	if (!((crc ^ (0x25cb9e70 >> ((crc >> 2) & 0x1c))) & 0xf)) {
161	data[buf >> 18] = buf >> 4;
162	status \|= 1 << (buf >> 18);
163	}
164	j++;
165	}
166	t = strobe;
167	buf = 0;
168	i = 0;
169	}
170	w = v;
171	v = u;
172	}
173
174	} while (status != 0xf && i < GRIP_MAX_BITS_XT && j < GRIP_MAX_CHUNKS_XT && t > 0);
175
176	local_irq_restore(flags);
177
178	return -(status != 0xf);
179	}
180
181	/*
182	* grip_timer() repeatedly polls the joysticks and generates events.
183	*/
184
185	static void grip_poll(struct gameport *gameport)
186	{
187	struct grip *grip = gameport_get_drvdata(gameport);
188	unsigned int data[GRIP_LENGTH_XT];
189	struct input_dev *dev;
190	int i, j;
191
192	for (i = 0; i < 2; i++) {
193
17dd3f0f	194	dev = grip->dev[i];
3575c341 DT	195	if (!dev)
	196	continue;
	197
1da177e4 LT	198	grip->reads++;
	199
	200	switch (grip->mode[i]) {
	201
	202	case GRIP_MODE_GPP:
	203
	204	if (grip_gpp_read_packet(grip->gameport, (i << 1) + 4, data)) {
	205	grip->bads++;
	206	break;
	207	}
	208
	209	input_report_abs(dev, ABS_X, ((data >> 15) & 1) - ((data >> 16) & 1));
	210	input_report_abs(dev, ABS_Y, ((data >> 13) & 1) - ((data >> 12) & 1));
	211
	212	for (j = 0; j < 12; j++)
	213	if (grip_btn_gpp[j])
	214	input_report_key(dev, grip_btn_gpp[j], (*data >> j) & 1);
	215
	216	break;
	217
	218	case GRIP_MODE_BD:
	219
	220	if (grip_xt_read_packet(grip->gameport, (i << 1) + 4, data)) {
	221	grip->bads++;
	222	break;
	223	}
	224
	225	input_report_abs(dev, ABS_X, (data[0] >> 2) & 0x3f);
	226	input_report_abs(dev, ABS_Y, 63 - ((data[0] >> 8) & 0x3f));
	227	input_report_abs(dev, ABS_THROTTLE, (data[2] >> 8) & 0x3f);
	228
	229	input_report_abs(dev, ABS_HAT0X, ((data[2] >> 1) & 1) - ( data[2] & 1));
	230	input_report_abs(dev, ABS_HAT0Y, ((data[2] >> 2) & 1) - ((data[2] >> 3) & 1));
	231
	232	for (j = 0; j < 5; j++)
	233	input_report_key(dev, grip_btn_bd[j], (data[3] >> (j + 4)) & 1);
	234
	235	break;
	236
	237	case GRIP_MODE_XT:
	238
	239	if (grip_xt_read_packet(grip->gameport, (i << 1) + 4, data)) {
	240	grip->bads++;
	241	break;
	242	}
	243
	244	input_report_abs(dev, ABS_X, (data[0] >> 2) & 0x3f);
	245	input_report_abs(dev, ABS_Y, 63 - ((data[0] >> 8) & 0x3f));
	246	input_report_abs(dev, ABS_BRAKE, (data[1] >> 2) & 0x3f);
	247	input_report_abs(dev, ABS_GAS, (data[1] >> 8) & 0x3f);
	248	input_report_abs(dev, ABS_THROTTLE, (data[2] >> 8) & 0x3f);
	249
	250	input_report_abs(dev, ABS_HAT0X, ((data[2] >> 1) & 1) - ( data[2] & 1));
	251	input_report_abs(dev, ABS_HAT0Y, ((data[2] >> 2) & 1) - ((data[2] >> 3) & 1));
	252	input_report_abs(dev, ABS_HAT1X, ((data[2] >> 5) & 1) - ((data[2] >> 4) & 1));
	253	input_report_abs(dev, ABS_HAT1Y, ((data[2] >> 6) & 1) - ((data[2] >> 7) & 1));
	254
	255	for (j = 0; j < 11; j++)
	256	input_report_key(dev, grip_btn_xt[j], (data[3] >> (j + 3)) & 1);
	257	break;
	258
	259	case GRIP_MODE_DC:
	260
	261	if (grip_xt_read_packet(grip->gameport, (i << 1) + 4, data)) {
262	grip->bads++;
263	break;
264	}
265
266	input_report_abs(dev, ABS_X, (data[0] >> 2) & 0x3f);
267	input_report_abs(dev, ABS_Y, (data[0] >> 8) & 0x3f);
268	input_report_abs(dev, ABS_RX, (data[1] >> 2) & 0x3f);
269	input_report_abs(dev, ABS_RY, (data[1] >> 8) & 0x3f);
270	input_report_abs(dev, ABS_THROTTLE, (data[2] >> 8) & 0x3f);
271
272	input_report_abs(dev, ABS_HAT0X, ((data[2] >> 1) & 1) - ( data[2] & 1));
273	input_report_abs(dev, ABS_HAT0Y, ((data[2] >> 2) & 1) - ((data[2] >> 3) & 1));
274
275	for (j = 0; j < 9; j++)
276	input_report_key(dev, grip_btn_dc[j], (data[3] >> (j + 3)) & 1);
277	break;
278
279
280	}
281
282	input_sync(dev);
283	}
284	}
285
286	static int grip_open(struct input_dev *dev)
287	{
8715c1cf	288	struct grip *grip = input_get_drvdata(dev);
1da177e4 LT	289
	290	gameport_start_polling(grip->gameport);
	291	return 0;
	292	}
	293
	294	static void grip_close(struct input_dev *dev)
	295	{
8715c1cf	296	struct grip *grip = input_get_drvdata(dev);
1da177e4 LT	297
	298	gameport_stop_polling(grip->gameport);
	299	}
	300
	301	static int grip_connect(struct gameport gameport, struct gameport_driver drv)
	302	{
	303	struct grip *grip;
17dd3f0f	304	struct input_dev *input_dev;
1da177e4 LT	305	unsigned int data[GRIP_LENGTH_XT];
	306	int i, j, t;
	307	int err;
	308
a97e148a	309	if (!(grip = kzalloc(sizeof(struct grip), GFP_KERNEL)))
1da177e4 LT	310	return -ENOMEM;
	311
	312	grip->gameport = gameport;
	313
	314	gameport_set_drvdata(gameport, grip);
	315
	316	err = gameport_open(gameport, drv, GAMEPORT_MODE_RAW);
	317	if (err)
	318	goto fail1;
	319
	320	for (i = 0; i < 2; i++) {
	321	if (!grip_gpp_read_packet(gameport, (i << 1) + 4, data)) {
	322	grip->mode[i] = GRIP_MODE_GPP;
	323	continue;
	324	}
	325	if (!grip_xt_read_packet(gameport, (i << 1) + 4, data)) {
	326	if (!(data[3] & 7)) {
	327	grip->mode[i] = GRIP_MODE_BD;
	328	continue;
	329	}
	330	if (!(data[2] & 0xf0)) {
	331	grip->mode[i] = GRIP_MODE_XT;
	332	continue;
	333	}
	334	grip->mode[i] = GRIP_MODE_DC;
	335	continue;
	336	}
	337	}
	338
	339	if (!grip->mode[0] && !grip->mode[1]) {
	340	err = -ENODEV;
	341	goto fail2;
	342	}
	343
	344	gameport_set_poll_handler(gameport, grip_poll);
	345	gameport_set_poll_interval(gameport, 20);
	346
17dd3f0f DT	347	for (i = 0; i < 2; i++) {
	348	if (!grip->mode[i])
	349	continue;
1da177e4	350
17dd3f0f DT	351	grip->dev[i] = input_dev = input_allocate_device();
	352	if (!input_dev) {
	353	err = -ENOMEM;
	354	goto fail3;
	355	}
1da177e4	356
10ca4c0a DT	357	snprintf(grip->phys[i], sizeof(grip->phys[i]),
10ca4c0a DT	358	"%s/input%d", gameport->phys, i);
1da177e4	359
17dd3f0f DT	360	input_dev->name = grip_name[grip->mode[i]];
	361	input_dev->phys = grip->phys[i];
	362	input_dev->id.bustype = BUS_GAMEPORT;
	363	input_dev->id.vendor = GAMEPORT_ID_VENDOR_GRAVIS;
	364	input_dev->id.product = grip->mode[i];
	365	input_dev->id.version = 0x0100;
935e658e	366	input_dev->dev.parent = &gameport->dev;
8715c1cf DT	367
8715c1cf DT	368	input_set_drvdata(input_dev, grip);
1da177e4	369
17dd3f0f DT	370	input_dev->open = grip_open;
17dd3f0f DT	371	input_dev->close = grip_close;
1da177e4	372
17dd3f0f	373	input_dev->evbit[0] = BIT(EV_KEY) \| BIT(EV_ABS);
1da177e4	374
17dd3f0f	375	for (j = 0; (t = grip_abs[grip->mode[i]][j]) >= 0; j++) {
1da177e4	376
17dd3f0f DT	377	if (j < grip_cen[grip->mode[i]])
	378	input_set_abs_params(input_dev, t, 14, 52, 1, 2);
	379	else if (j < grip_anx[grip->mode[i]])
	380	input_set_abs_params(input_dev, t, 3, 57, 1, 0);
	381	else
	382	input_set_abs_params(input_dev, t, -1, 1, 0, 0);
	383	}
1da177e4	384
17dd3f0f DT	385	for (j = 0; (t = grip_btn[grip->mode[i]][j]) >= 0; j++)
	386	if (t > 0)
	387	set_bit(t, input_dev->keybit);
1da177e4	388
0399addd DT	389	err = input_register_device(grip->dev[i]);
	390	if (err)
	391	goto fail4;
17dd3f0f	392	}
1da177e4 LT	393
	394	return 0;
	395
0399addd DT	396	fail4: input_free_device(grip->dev[i]);
0399addd DT	397	fail3: while (--i >= 0)
17dd3f0f DT	398	if (grip->dev[i])
	399	input_unregister_device(grip->dev[i]);
	400	fail2: gameport_close(gameport);
	401	fail1: gameport_set_drvdata(gameport, NULL);
1da177e4 LT	402	kfree(grip);
	403	return err;
	404	}
	405
	406	static void grip_disconnect(struct gameport *gameport)
	407	{
	408	struct grip *grip = gameport_get_drvdata(gameport);
	409	int i;
	410
	411	for (i = 0; i < 2; i++)
17dd3f0f DT	412	if (grip->dev[i])
17dd3f0f DT	413	input_unregister_device(grip->dev[i]);
1da177e4 LT	414	gameport_close(gameport);
	415	gameport_set_drvdata(gameport, NULL);
	416	kfree(grip);
	417	}
	418
	419	static struct gameport_driver grip_drv = {
	420	.driver = {
	421	.name = "grip",
0399addd	422	.owner = THIS_MODULE,
1da177e4 LT	423	},
	424	.description = DRIVER_DESC,
	425	.connect = grip_connect,
	426	.disconnect = grip_disconnect,
	427	};
	428
	429	static int __init grip_init(void)
	430	{
	431	gameport_register_driver(&grip_drv);
	432	return 0;
	433	}
	434
	435	static void __exit grip_exit(void)
	436	{
	437	gameport_unregister_driver(&grip_drv);
	438	}
	439
	440	module_init(grip_init);
	441	module_exit(grip_exit);