[linux.git] / drivers / input / joystick / turbografx.c

/*
 *  Copyright (c) 1998-2001 Vojtech Pavlik
 *
 *  Based on the work of:
 *	Steffen Schwenke
 */

/*
 * TurboGraFX parallel port interface 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 <[email protected]>, or by paper mail:
 * Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic
 */

#include <linux/kernel.h>
#include <linux/parport.h>
#include <linux/input.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/mutex.h>
#include <linux/slab.h>

MODULE_AUTHOR("Vojtech Pavlik <[email protected]>");
MODULE_DESCRIPTION("TurboGraFX parallel port interface driver");
MODULE_LICENSE("GPL");

#define TGFX_MAX_PORTS		3
#define TGFX_MAX_DEVICES	7

struct tgfx_config {
	int args[TGFX_MAX_DEVICES + 1];
	unsigned int nargs;
};

static struct tgfx_config tgfx_cfg[TGFX_MAX_PORTS] __initdata;

module_param_array_named(map, tgfx_cfg[0].args, int, &tgfx_cfg[0].nargs, 0);
MODULE_PARM_DESC(map, "Describes first set of devices (<parport#>,<js1>,<js2>,..<js7>");
module_param_array_named(map2, tgfx_cfg[1].args, int, &tgfx_cfg[1].nargs, 0);
MODULE_PARM_DESC(map2, "Describes second set of devices");
module_param_array_named(map3, tgfx_cfg[2].args, int, &tgfx_cfg[2].nargs, 0);
MODULE_PARM_DESC(map3, "Describes third set of devices");

#define TGFX_REFRESH_TIME	HZ/100	/* 10 ms */

#define TGFX_TRIGGER		0x08
#define TGFX_UP			0x10
#define TGFX_DOWN		0x20
#define TGFX_LEFT		0x40
#define TGFX_RIGHT		0x80

#define TGFX_THUMB		0x02
#define TGFX_THUMB2		0x04
#define TGFX_TOP		0x01
#define TGFX_TOP2		0x08

static int tgfx_buttons[] = { BTN_TRIGGER, BTN_THUMB, BTN_THUMB2, BTN_TOP, BTN_TOP2 };

static struct tgfx {
	struct pardevice *pd;
	struct timer_list timer;
	struct input_dev *dev[TGFX_MAX_DEVICES];
	char name[TGFX_MAX_DEVICES][64];
	char phys[TGFX_MAX_DEVICES][32];
	int sticks;
	int used;
	struct mutex sem;
} *tgfx_base[TGFX_MAX_PORTS];

/*
 * tgfx_timer() reads and analyzes TurboGraFX joystick data.
 */

static void tgfx_timer(unsigned long private)
{
	struct tgfx *tgfx = (void *) private;
	struct input_dev *dev;
	int data1, data2, i;

	for (i = 0; i < 7; i++)
		if (tgfx->sticks & (1 << i)) {

			dev = tgfx->dev[i];

			parport_write_data(tgfx->pd->port, ~(1 << i));
			data1 = parport_read_status(tgfx->pd->port) ^ 0x7f;
			data2 = parport_read_control(tgfx->pd->port) ^ 0x04;	/* CAVEAT parport */

			input_report_abs(dev, ABS_X, !!(data1 & TGFX_RIGHT) - !!(data1 & TGFX_LEFT));
			input_report_abs(dev, ABS_Y, !!(data1 & TGFX_DOWN ) - !!(data1 & TGFX_UP  ));

			input_report_key(dev, BTN_TRIGGER, (data1 & TGFX_TRIGGER));
			input_report_key(dev, BTN_THUMB,   (data2 & TGFX_THUMB  ));
			input_report_key(dev, BTN_THUMB2,  (data2 & TGFX_THUMB2 ));
			input_report_key(dev, BTN_TOP,     (data2 & TGFX_TOP    ));
			input_report_key(dev, BTN_TOP2,    (data2 & TGFX_TOP2   ));

			input_sync(dev);
		}

	mod_timer(&tgfx->timer, jiffies + TGFX_REFRESH_TIME);
}

static int tgfx_open(struct input_dev *dev)
{
	struct tgfx *tgfx = input_get_drvdata(dev);
	int err;

	err = mutex_lock_interruptible(&tgfx->sem);
	if (err)
		return err;

	if (!tgfx->used++) {
		parport_claim(tgfx->pd);
		parport_write_control(tgfx->pd->port, 0x04);
		mod_timer(&tgfx->timer, jiffies + TGFX_REFRESH_TIME);
	}

	mutex_unlock(&tgfx->sem);
	return 0;
}

static void tgfx_close(struct input_dev *dev)
{
	struct tgfx *tgfx = input_get_drvdata(dev);

	mutex_lock(&tgfx->sem);
	if (!--tgfx->used) {
		del_timer_sync(&tgfx->timer);
		parport_write_control(tgfx->pd->port, 0x00);
		parport_release(tgfx->pd);
	}
	mutex_unlock(&tgfx->sem);
}


/*
 * tgfx_probe() probes for tg gamepads.
 */

static struct tgfx __init *tgfx_probe(int parport, int *n_buttons, int n_devs)
{
	struct tgfx *tgfx;
	struct input_dev *input_dev;
	struct parport *pp;
	struct pardevice *pd;
	int i, j;
	int err;

	pp = parport_find_number(parport);
	if (!pp) {
		printk(KERN_ERR "turbografx.c: no such parport\n");
		err = -EINVAL;
		goto err_out;
	}

	pd = parport_register_device(pp, "turbografx", NULL, NULL, NULL, PARPORT_DEV_EXCL, NULL);
	if (!pd) {
		printk(KERN_ERR "turbografx.c: parport busy already - lp.o loaded?\n");
		err = -EBUSY;
		goto err_put_pp;
	}

	tgfx = kzalloc(sizeof(struct tgfx), GFP_KERNEL);
	if (!tgfx) {
		printk(KERN_ERR "turbografx.c: Not enough memory\n");
		err = -ENOMEM;
		goto err_unreg_pardev;
	}

	mutex_init(&tgfx->sem);
	tgfx->pd = pd;
	init_timer(&tgfx->timer);
	tgfx->timer.data = (long) tgfx;
	tgfx->timer.function = tgfx_timer;

	for (i = 0; i < n_devs; i++) {
		if (n_buttons[i] < 1)
			continue;

		if (n_buttons[i] > 6) {
			printk(KERN_ERR "turbografx.c: Invalid number of buttons %d\n", n_buttons[i]);
			err = -EINVAL;
			goto err_unreg_devs;
		}

		tgfx->dev[i] = input_dev = input_allocate_device();
		if (!input_dev) {
			printk(KERN_ERR "turbografx.c: Not enough memory for input device\n");
			err = -ENOMEM;
			goto err_unreg_devs;
		}

		tgfx->sticks |= (1 << i);
		snprintf(tgfx->name[i], sizeof(tgfx->name[i]),
			 "TurboGraFX %d-button Multisystem joystick", n_buttons[i]);
		snprintf(tgfx->phys[i], sizeof(tgfx->phys[i]),
			 "%s/input%d", tgfx->pd->port->name, i);

		input_dev->name = tgfx->name[i];
		input_dev->phys = tgfx->phys[i];
		input_dev->id.bustype = BUS_PARPORT;
		input_dev->id.vendor = 0x0003;
		input_dev->id.product = n_buttons[i];
		input_dev->id.version = 0x0100;

		input_set_drvdata(input_dev, tgfx);

		input_dev->open = tgfx_open;
		input_dev->close = tgfx_close;

		input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
		input_set_abs_params(input_dev, ABS_X, -1, 1, 0, 0);
		input_set_abs_params(input_dev, ABS_Y, -1, 1, 0, 0);

		for (j = 0; j < n_buttons[i]; j++)
			set_bit(tgfx_buttons[j], input_dev->keybit);

		err = input_register_device(tgfx->dev[i]);
		if (err)
			goto err_free_dev;
	}

        if (!tgfx->sticks) {
		printk(KERN_ERR "turbografx.c: No valid devices specified\n");
		err = -EINVAL;
		goto err_free_tgfx;
        }

	parport_put_port(pp);
	return tgfx;

 err_free_dev:
	input_free_device(tgfx->dev[i]);
 err_unreg_devs:
	while (--i >= 0)
		if (tgfx->dev[i])
			input_unregister_device(tgfx->dev[i]);
 err_free_tgfx:
	kfree(tgfx);
 err_unreg_pardev:
	parport_unregister_device(pd);
 err_put_pp:
	parport_put_port(pp);
 err_out:
	return ERR_PTR(err);
}

static void tgfx_remove(struct tgfx *tgfx)
{
	int i;

	for (i = 0; i < TGFX_MAX_DEVICES; i++)
		if (tgfx->dev[i])
			input_unregister_device(tgfx->dev[i]);
	parport_unregister_device(tgfx->pd);
	kfree(tgfx);
}

static int __init tgfx_init(void)
{
	int i;
	int have_dev = 0;
	int err = 0;

	for (i = 0; i < TGFX_MAX_PORTS; i++) {
		if (tgfx_cfg[i].nargs == 0 || tgfx_cfg[i].args[0] < 0)
			continue;

		if (tgfx_cfg[i].nargs < 2) {
			printk(KERN_ERR "turbografx.c: at least one joystick must be specified\n");
			err = -EINVAL;
			break;
		}

		tgfx_base[i] = tgfx_probe(tgfx_cfg[i].args[0],
					  tgfx_cfg[i].args + 1,
					  tgfx_cfg[i].nargs - 1);
		if (IS_ERR(tgfx_base[i])) {
			err = PTR_ERR(tgfx_base[i]);
			break;
		}

		have_dev = 1;
	}

	if (err) {
		while (--i >= 0)
			if (tgfx_base[i])
				tgfx_remove(tgfx_base[i]);
		return err;
	}

	return have_dev ? 0 : -ENODEV;
}

static void __exit tgfx_exit(void)
{
	int i;

	for (i = 0; i < TGFX_MAX_PORTS; i++)
		if (tgfx_base[i])
			tgfx_remove(tgfx_base[i]);
}

module_init(tgfx_init);
module_exit(tgfx_exit);
Commit	Line	Data
1da177e4	1	/*
1da177e4 LT	2	* Copyright (c) 1998-2001 Vojtech Pavlik
	3	*
	4	* Based on the work of:
	5	* Steffen Schwenke
	6	*/
	7
	8	/*
	9	* TurboGraFX parallel port interface driver for Linux.
	10	*/
	11
	12	/*
	13	* This program is free software; you can redistribute it and/or modify
	14	* it under the terms of the GNU General Public License as published by
	15	* the Free Software Foundation; either version 2 of the License, or
	16	* (at your option) any later version.
	17	*
	18	* This program is distributed in the hope that it will be useful,
	19	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	20	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	21	* GNU General Public License for more details.
	22	*
	23	* You should have received a copy of the GNU General Public License
	24	* along with this program; if not, write to the Free Software
	25	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
	26	*
	27	* Should you need to contact me, the author, you can do so either by
	28	* e-mail - mail your message to <[email protected]>, or by paper mail:
	29	* Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic
	30	*/
	31
	32	#include <linux/kernel.h>
	33	#include <linux/parport.h>
	34	#include <linux/input.h>
	35	#include <linux/module.h>
1da177e4	36	#include <linux/init.h>
72ba9f0c	37	#include <linux/mutex.h>
5a0e3ad6	38	#include <linux/slab.h>
1da177e4 LT	39
	40	MODULE_AUTHOR("Vojtech Pavlik <[email protected]>");
	41	MODULE_DESCRIPTION("TurboGraFX parallel port interface driver");
	42	MODULE_LICENSE("GPL");
	43
17dd3f0f DT	44	#define TGFX_MAX_PORTS 3
17dd3f0f DT	45	#define TGFX_MAX_DEVICES 7
1da177e4	46
17dd3f0f DT	47	struct tgfx_config {
17dd3f0f DT	48	int args[TGFX_MAX_DEVICES + 1];
78167236	49	unsigned int nargs;
17dd3f0f DT	50	};
17dd3f0f DT	51
78167236	52	static struct tgfx_config tgfx_cfg[TGFX_MAX_PORTS] __initdata;
1da177e4	53
78167236	54	module_param_array_named(map, tgfx_cfg[0].args, int, &tgfx_cfg[0].nargs, 0);
17dd3f0f	55	MODULE_PARM_DESC(map, "Describes first set of devices (<parport#>,<js1>,<js2>,..<js7>");
78167236	56	module_param_array_named(map2, tgfx_cfg[1].args, int, &tgfx_cfg[1].nargs, 0);
17dd3f0f	57	MODULE_PARM_DESC(map2, "Describes second set of devices");
78167236	58	module_param_array_named(map3, tgfx_cfg[2].args, int, &tgfx_cfg[2].nargs, 0);
1da177e4 LT	59	MODULE_PARM_DESC(map3, "Describes third set of devices");
1da177e4 LT	60
1da177e4 LT	61	#define TGFX_REFRESH_TIME HZ/100 /* 10 ms */
	62
	63	#define TGFX_TRIGGER 0x08
	64	#define TGFX_UP 0x10
	65	#define TGFX_DOWN 0x20
	66	#define TGFX_LEFT 0x40
	67	#define TGFX_RIGHT 0x80
	68
	69	#define TGFX_THUMB 0x02
	70	#define TGFX_THUMB2 0x04
	71	#define TGFX_TOP 0x01
	72	#define TGFX_TOP2 0x08
	73
	74	static int tgfx_buttons[] = { BTN_TRIGGER, BTN_THUMB, BTN_THUMB2, BTN_TOP, BTN_TOP2 };
1da177e4 LT	75
	76	static struct tgfx {
	77	struct pardevice *pd;
	78	struct timer_list timer;
17dd3f0f DT	79	struct input_dev *dev[TGFX_MAX_DEVICES];
	80	char name[TGFX_MAX_DEVICES][64];
	81	char phys[TGFX_MAX_DEVICES][32];
1da177e4 LT	82	int sticks;
1da177e4 LT	83	int used;
72ba9f0c	84	struct mutex sem;
17dd3f0f	85	} *tgfx_base[TGFX_MAX_PORTS];
1da177e4 LT	86
	87	/*
	88	* tgfx_timer() reads and analyzes TurboGraFX joystick data.
	89	*/
	90
	91	static void tgfx_timer(unsigned long private)
	92	{
	93	struct tgfx tgfx = (void ) private;
	94	struct input_dev *dev;
	95	int data1, data2, i;
	96
	97	for (i = 0; i < 7; i++)
	98	if (tgfx->sticks & (1 << i)) {
	99
17dd3f0f	100	dev = tgfx->dev[i];
1da177e4 LT	101
	102	parport_write_data(tgfx->pd->port, ~(1 << i));
	103	data1 = parport_read_status(tgfx->pd->port) ^ 0x7f;
	104	data2 = parport_read_control(tgfx->pd->port) ^ 0x04; /* CAVEAT parport */
	105
	106	input_report_abs(dev, ABS_X, !!(data1 & TGFX_RIGHT) - !!(data1 & TGFX_LEFT));
	107	input_report_abs(dev, ABS_Y, !!(data1 & TGFX_DOWN ) - !!(data1 & TGFX_UP ));
	108
	109	input_report_key(dev, BTN_TRIGGER, (data1 & TGFX_TRIGGER));
	110	input_report_key(dev, BTN_THUMB, (data2 & TGFX_THUMB ));
	111	input_report_key(dev, BTN_THUMB2, (data2 & TGFX_THUMB2 ));
	112	input_report_key(dev, BTN_TOP, (data2 & TGFX_TOP ));
	113	input_report_key(dev, BTN_TOP2, (data2 & TGFX_TOP2 ));
	114
	115	input_sync(dev);
	116	}
	117
	118	mod_timer(&tgfx->timer, jiffies + TGFX_REFRESH_TIME);
	119	}
	120
	121	static int tgfx_open(struct input_dev *dev)
	122	{
8715c1cf	123	struct tgfx *tgfx = input_get_drvdata(dev);
8b1a198b DT	124	int err;
8b1a198b DT	125
72ba9f0c	126	err = mutex_lock_interruptible(&tgfx->sem);
8b1a198b DT	127	if (err)
	128	return err;
	129
ab0c3443	130	if (!tgfx->used++) {
1da177e4 LT	131	parport_claim(tgfx->pd);
1da177e4 LT	132	parport_write_control(tgfx->pd->port, 0x04);
ab0c3443	133	mod_timer(&tgfx->timer, jiffies + TGFX_REFRESH_TIME);
1da177e4	134	}
8b1a198b	135
72ba9f0c	136	mutex_unlock(&tgfx->sem);
ab0c3443	137	return 0;
1da177e4 LT	138	}
	139
	140	static void tgfx_close(struct input_dev *dev)
	141	{
8715c1cf	142	struct tgfx *tgfx = input_get_drvdata(dev);
8b1a198b	143
72ba9f0c	144	mutex_lock(&tgfx->sem);
ab0c3443	145	if (!--tgfx->used) {
8b1a198b	146	del_timer_sync(&tgfx->timer);
1da177e4	147	parport_write_control(tgfx->pd->port, 0x00);
ab0c3443	148	parport_release(tgfx->pd);
1da177e4	149	}
72ba9f0c	150	mutex_unlock(&tgfx->sem);
1da177e4 LT	151	}
1da177e4 LT	152
17dd3f0f DT	153
17dd3f0f DT	154
1da177e4 LT	155	/*
	156	* tgfx_probe() probes for tg gamepads.
	157	*/
	158
17dd3f0f	159	static struct tgfx __init tgfx_probe(int parport, int n_buttons, int n_devs)
1da177e4 LT	160	{
1da177e4 LT	161	struct tgfx *tgfx;
17dd3f0f	162	struct input_dev *input_dev;
1da177e4	163	struct parport *pp;
17dd3f0f	164	struct pardevice *pd;
1da177e4	165	int i, j;
17dd3f0f	166	int err;
1da177e4	167
17dd3f0f	168	pp = parport_find_number(parport);
1da177e4 LT	169	if (!pp) {
1da177e4 LT	170	printk(KERN_ERR "turbografx.c: no such parport\n");
17dd3f0f DT	171	err = -EINVAL;
17dd3f0f DT	172	goto err_out;
1da177e4 LT	173	}
1da177e4 LT	174
17dd3f0f DT	175	pd = parport_register_device(pp, "turbografx", NULL, NULL, NULL, PARPORT_DEV_EXCL, NULL);
	176	if (!pd) {
	177	printk(KERN_ERR "turbografx.c: parport busy already - lp.o loaded?\n");
	178	err = -EBUSY;
	179	goto err_put_pp;
1da177e4	180	}
8b1a198b	181
17dd3f0f DT	182	tgfx = kzalloc(sizeof(struct tgfx), GFP_KERNEL);
	183	if (!tgfx) {
	184	printk(KERN_ERR "turbografx.c: Not enough memory\n");
	185	err = -ENOMEM;
	186	goto err_unreg_pardev;
1da177e4 LT	187	}
1da177e4 LT	188
72ba9f0c	189	mutex_init(&tgfx->sem);
17dd3f0f	190	tgfx->pd = pd;
1da177e4 LT	191	init_timer(&tgfx->timer);
	192	tgfx->timer.data = (long) tgfx;
	193	tgfx->timer.function = tgfx_timer;
	194
17dd3f0f DT	195	for (i = 0; i < n_devs; i++) {
	196	if (n_buttons[i] < 1)
	197	continue;
1da177e4	198
17dd3f0f DT	199	if (n_buttons[i] > 6) {
	200	printk(KERN_ERR "turbografx.c: Invalid number of buttons %d\n", n_buttons[i]);
	201	err = -EINVAL;
ab52cd66	202	goto err_unreg_devs;
17dd3f0f	203	}
1da177e4	204
17dd3f0f DT	205	tgfx->dev[i] = input_dev = input_allocate_device();
	206	if (!input_dev) {
	207	printk(KERN_ERR "turbografx.c: Not enough memory for input device\n");
	208	err = -ENOMEM;
ab52cd66	209	goto err_unreg_devs;
17dd3f0f	210	}
1da177e4	211
17dd3f0f DT	212	tgfx->sticks \|= (1 << i);
	213	snprintf(tgfx->name[i], sizeof(tgfx->name[i]),
	214	"TurboGraFX %d-button Multisystem joystick", n_buttons[i]);
	215	snprintf(tgfx->phys[i], sizeof(tgfx->phys[i]),
	216	"%s/input%d", tgfx->pd->port->name, i);
1da177e4	217
17dd3f0f DT	218	input_dev->name = tgfx->name[i];
	219	input_dev->phys = tgfx->phys[i];
	220	input_dev->id.bustype = BUS_PARPORT;
	221	input_dev->id.vendor = 0x0003;
	222	input_dev->id.product = n_buttons[i];
	223	input_dev->id.version = 0x0100;
1da177e4	224
8715c1cf DT	225	input_set_drvdata(input_dev, tgfx);
8715c1cf DT	226
17dd3f0f DT	227	input_dev->open = tgfx_open;
17dd3f0f DT	228	input_dev->close = tgfx_close;
1da177e4	229
7b19ada2	230	input_dev->evbit[0] = BIT_MASK(EV_KEY) \| BIT_MASK(EV_ABS);
17dd3f0f DT	231	input_set_abs_params(input_dev, ABS_X, -1, 1, 0, 0);
17dd3f0f DT	232	input_set_abs_params(input_dev, ABS_Y, -1, 1, 0, 0);
1da177e4	233
17dd3f0f DT	234	for (j = 0; j < n_buttons[i]; j++)
17dd3f0f DT	235	set_bit(tgfx_buttons[j], input_dev->keybit);
1da177e4	236
ab52cd66 DT	237	err = input_register_device(tgfx->dev[i]);
	238	if (err)
	239	goto err_free_dev;
17dd3f0f	240	}
1da177e4 LT	241
1da177e4 LT	242	if (!tgfx->sticks) {
17dd3f0f DT	243	printk(KERN_ERR "turbografx.c: No valid devices specified\n");
	244	err = -EINVAL;
	245	goto err_free_tgfx;
1da177e4 LT	246	}
1da177e4 LT	247
8ed9e0e1	248	parport_put_port(pp);
1da177e4	249	return tgfx;
17dd3f0f	250
ab52cd66 DT	251	err_free_dev:
	252	input_free_device(tgfx->dev[i]);
	253	err_unreg_devs:
17dd3f0f	254	while (--i >= 0)
ab52cd66 DT	255	if (tgfx->dev[i])
ab52cd66 DT	256	input_unregister_device(tgfx->dev[i]);
17dd3f0f DT	257	err_free_tgfx:
	258	kfree(tgfx);
	259	err_unreg_pardev:
	260	parport_unregister_device(pd);
	261	err_put_pp:
	262	parport_put_port(pp);
	263	err_out:
	264	return ERR_PTR(err);
	265	}
	266
ab52cd66	267	static void tgfx_remove(struct tgfx *tgfx)
17dd3f0f DT	268	{
	269	int i;
	270
	271	for (i = 0; i < TGFX_MAX_DEVICES; i++)
	272	if (tgfx->dev[i])
	273	input_unregister_device(tgfx->dev[i]);
	274	parport_unregister_device(tgfx->pd);
	275	kfree(tgfx);
1da177e4 LT	276	}
	277
	278	static int __init tgfx_init(void)
	279	{
17dd3f0f DT	280	int i;
	281	int have_dev = 0;
	282	int err = 0;
	283
	284	for (i = 0; i < TGFX_MAX_PORTS; i++) {
78167236	285	if (tgfx_cfg[i].nargs == 0 \|\| tgfx_cfg[i].args[0] < 0)
17dd3f0f DT	286	continue;
17dd3f0f DT	287
78167236	288	if (tgfx_cfg[i].nargs < 2) {
17dd3f0f DT	289	printk(KERN_ERR "turbografx.c: at least one joystick must be specified\n");
	290	err = -EINVAL;
	291	break;
	292	}
	293
78167236 DT	294	tgfx_base[i] = tgfx_probe(tgfx_cfg[i].args[0],
	295	tgfx_cfg[i].args + 1,
	296	tgfx_cfg[i].nargs - 1);
17dd3f0f DT	297	if (IS_ERR(tgfx_base[i])) {
	298	err = PTR_ERR(tgfx_base[i]);
	299	break;
	300	}
	301
	302	have_dev = 1;
	303	}
1da177e4	304
17dd3f0f DT	305	if (err) {
17dd3f0f DT	306	while (--i >= 0)
ab52cd66 DT	307	if (tgfx_base[i])
ab52cd66 DT	308	tgfx_remove(tgfx_base[i]);
17dd3f0f DT	309	return err;
17dd3f0f DT	310	}
1da177e4	311
17dd3f0f	312	return have_dev ? 0 : -ENODEV;
1da177e4 LT	313	}
	314
	315	static void __exit tgfx_exit(void)
	316	{
17dd3f0f	317	int i;
1da177e4	318
17dd3f0f DT	319	for (i = 0; i < TGFX_MAX_PORTS; i++)
	320	if (tgfx_base[i])
	321	tgfx_remove(tgfx_base[i]);
1da177e4 LT	322	}
	323
	324	module_init(tgfx_init);
	325	module_exit(tgfx_exit);