[linux-2.6-block.git] / drivers / input / joystick / turbografx.c

/*
 * $Id: turbografx.c,v 1.14 2002/01/22 20:30:39 vojtech Exp $
 *
 *  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 <vojtech@ucw.cz>, 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/moduleparam.h>
#include <linux/init.h>
#include <linux/mutex.h>

MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
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];
	int nargs;
};

static struct tgfx_config tgfx[TGFX_MAX_PORTS] __initdata;

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

	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[i].nargs == 0 || tgfx[i].args[0] < 0)
			continue;

		if (tgfx[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[i].args[0], tgfx[i].args + 1, tgfx[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 LT	1	/*
	2	* $Id: turbografx.c,v 1.14 2002/01/22 20:30:39 vojtech Exp $
	3	*
	4	* Copyright (c) 1998-2001 Vojtech Pavlik
	5	*
	6	* Based on the work of:
	7	* Steffen Schwenke
	8	*/
	9
	10	/*
	11	* TurboGraFX parallel port interface driver for Linux.
	12	*/
	13
	14	/*
	15	* This program is free software; you can redistribute it and/or modify
	16	* it under the terms of the GNU General Public License as published by
	17	* the Free Software Foundation; either version 2 of the License, or
	18	* (at your option) any later version.
	19	*
	20	* This program is distributed in the hope that it will be useful,
	21	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	22	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	23	* GNU General Public License for more details.
	24	*
	25	* You should have received a copy of the GNU General Public License
	26	* along with this program; if not, write to the Free Software
	27	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
	28	*
	29	* Should you need to contact me, the author, you can do so either by
	30	* e-mail - mail your message to <vojtech@ucw.cz>, or by paper mail:
	31	* Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic
	32	*/
	33
	34	#include <linux/kernel.h>
	35	#include <linux/parport.h>
	36	#include <linux/input.h>
	37	#include <linux/module.h>
	38	#include <linux/moduleparam.h>
	39	#include <linux/init.h>
72ba9f0c	40	#include <linux/mutex.h>
1da177e4 LT	41
	42	MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
	43	MODULE_DESCRIPTION("TurboGraFX parallel port interface driver");
	44	MODULE_LICENSE("GPL");
	45
17dd3f0f DT	46	#define TGFX_MAX_PORTS 3
17dd3f0f DT	47	#define TGFX_MAX_DEVICES 7
1da177e4	48
17dd3f0f DT	49	struct tgfx_config {
	50	int args[TGFX_MAX_DEVICES + 1];
	51	int nargs;
	52	};
	53
	54	static struct tgfx_config tgfx[TGFX_MAX_PORTS] __initdata;
1da177e4	55
17dd3f0f DT	56	module_param_array_named(map, tgfx[0].args, int, &tgfx[0].nargs, 0);
	57	MODULE_PARM_DESC(map, "Describes first set of devices (<parport#>,<js1>,<js2>,..<js7>");
	58	module_param_array_named(map2, tgfx[1].args, int, &tgfx[1].nargs, 0);
	59	MODULE_PARM_DESC(map2, "Describes second set of devices");
	60	module_param_array_named(map3, tgfx[2].args, int, &tgfx[2].nargs, 0);
1da177e4 LT	61	MODULE_PARM_DESC(map3, "Describes third set of devices");
1da177e4 LT	62
1da177e4 LT	63	#define TGFX_REFRESH_TIME HZ/100 /* 10 ms */
	64
	65	#define TGFX_TRIGGER 0x08
	66	#define TGFX_UP 0x10
	67	#define TGFX_DOWN 0x20
	68	#define TGFX_LEFT 0x40
	69	#define TGFX_RIGHT 0x80
	70
	71	#define TGFX_THUMB 0x02
	72	#define TGFX_THUMB2 0x04
	73	#define TGFX_TOP 0x01
	74	#define TGFX_TOP2 0x08
	75
	76	static int tgfx_buttons[] = { BTN_TRIGGER, BTN_THUMB, BTN_THUMB2, BTN_TOP, BTN_TOP2 };
1da177e4 LT	77
	78	static struct tgfx {
	79	struct pardevice *pd;
	80	struct timer_list timer;
17dd3f0f DT	81	struct input_dev *dev[TGFX_MAX_DEVICES];
	82	char name[TGFX_MAX_DEVICES][64];
	83	char phys[TGFX_MAX_DEVICES][32];
1da177e4 LT	84	int sticks;
1da177e4 LT	85	int used;
72ba9f0c	86	struct mutex sem;
17dd3f0f	87	} *tgfx_base[TGFX_MAX_PORTS];
1da177e4 LT	88
	89	/*
	90	* tgfx_timer() reads and analyzes TurboGraFX joystick data.
	91	*/
	92
	93	static void tgfx_timer(unsigned long private)
	94	{
	95	struct tgfx tgfx = (void ) private;
	96	struct input_dev *dev;
	97	int data1, data2, i;
	98
	99	for (i = 0; i < 7; i++)
	100	if (tgfx->sticks & (1 << i)) {
	101
17dd3f0f	102	dev = tgfx->dev[i];
1da177e4 LT	103
	104	parport_write_data(tgfx->pd->port, ~(1 << i));
	105	data1 = parport_read_status(tgfx->pd->port) ^ 0x7f;
	106	data2 = parport_read_control(tgfx->pd->port) ^ 0x04; /* CAVEAT parport */
	107
	108	input_report_abs(dev, ABS_X, !!(data1 & TGFX_RIGHT) - !!(data1 & TGFX_LEFT));
	109	input_report_abs(dev, ABS_Y, !!(data1 & TGFX_DOWN ) - !!(data1 & TGFX_UP ));
	110
	111	input_report_key(dev, BTN_TRIGGER, (data1 & TGFX_TRIGGER));
	112	input_report_key(dev, BTN_THUMB, (data2 & TGFX_THUMB ));
	113	input_report_key(dev, BTN_THUMB2, (data2 & TGFX_THUMB2 ));
	114	input_report_key(dev, BTN_TOP, (data2 & TGFX_TOP ));
	115	input_report_key(dev, BTN_TOP2, (data2 & TGFX_TOP2 ));
	116
	117	input_sync(dev);
	118	}
	119
	120	mod_timer(&tgfx->timer, jiffies + TGFX_REFRESH_TIME);
	121	}
	122
	123	static int tgfx_open(struct input_dev *dev)
	124	{
8715c1cf	125	struct tgfx *tgfx = input_get_drvdata(dev);
8b1a198b DT	126	int err;
8b1a198b DT	127
72ba9f0c	128	err = mutex_lock_interruptible(&tgfx->sem);
8b1a198b DT	129	if (err)
	130	return err;
	131
ab0c3443	132	if (!tgfx->used++) {
1da177e4 LT	133	parport_claim(tgfx->pd);
1da177e4 LT	134	parport_write_control(tgfx->pd->port, 0x04);
ab0c3443	135	mod_timer(&tgfx->timer, jiffies + TGFX_REFRESH_TIME);
1da177e4	136	}
8b1a198b	137
72ba9f0c	138	mutex_unlock(&tgfx->sem);
ab0c3443	139	return 0;
1da177e4 LT	140	}
	141
	142	static void tgfx_close(struct input_dev *dev)
	143	{
8715c1cf	144	struct tgfx *tgfx = input_get_drvdata(dev);
8b1a198b	145
72ba9f0c	146	mutex_lock(&tgfx->sem);
ab0c3443	147	if (!--tgfx->used) {
8b1a198b	148	del_timer_sync(&tgfx->timer);
1da177e4	149	parport_write_control(tgfx->pd->port, 0x00);
ab0c3443	150	parport_release(tgfx->pd);
1da177e4	151	}
72ba9f0c	152	mutex_unlock(&tgfx->sem);
1da177e4 LT	153	}
1da177e4 LT	154
17dd3f0f DT	155
17dd3f0f DT	156
1da177e4 LT	157	/*
	158	* tgfx_probe() probes for tg gamepads.
	159	*/
	160
17dd3f0f	161	static struct tgfx __init tgfx_probe(int parport, int n_buttons, int n_devs)
1da177e4 LT	162	{
1da177e4 LT	163	struct tgfx *tgfx;
17dd3f0f	164	struct input_dev *input_dev;
1da177e4	165	struct parport *pp;
17dd3f0f	166	struct pardevice *pd;
1da177e4	167	int i, j;
17dd3f0f	168	int err;
1da177e4	169
17dd3f0f	170	pp = parport_find_number(parport);
1da177e4 LT	171	if (!pp) {
1da177e4 LT	172	printk(KERN_ERR "turbografx.c: no such parport\n");
17dd3f0f DT	173	err = -EINVAL;
17dd3f0f DT	174	goto err_out;
1da177e4 LT	175	}
1da177e4 LT	176
17dd3f0f DT	177	pd = parport_register_device(pp, "turbografx", NULL, NULL, NULL, PARPORT_DEV_EXCL, NULL);
	178	if (!pd) {
	179	printk(KERN_ERR "turbografx.c: parport busy already - lp.o loaded?\n");
	180	err = -EBUSY;
	181	goto err_put_pp;
1da177e4	182	}
8b1a198b	183
17dd3f0f DT	184	tgfx = kzalloc(sizeof(struct tgfx), GFP_KERNEL);
	185	if (!tgfx) {
	186	printk(KERN_ERR "turbografx.c: Not enough memory\n");
	187	err = -ENOMEM;
	188	goto err_unreg_pardev;
1da177e4 LT	189	}
1da177e4 LT	190
72ba9f0c	191	mutex_init(&tgfx->sem);
17dd3f0f	192	tgfx->pd = pd;
1da177e4 LT	193	init_timer(&tgfx->timer);
	194	tgfx->timer.data = (long) tgfx;
	195	tgfx->timer.function = tgfx_timer;
	196
17dd3f0f DT	197	for (i = 0; i < n_devs; i++) {
	198	if (n_buttons[i] < 1)
	199	continue;
1da177e4	200
17dd3f0f DT	201	if (n_buttons[i] > 6) {
	202	printk(KERN_ERR "turbografx.c: Invalid number of buttons %d\n", n_buttons[i]);
	203	err = -EINVAL;
ab52cd66	204	goto err_unreg_devs;
17dd3f0f	205	}
1da177e4	206
17dd3f0f DT	207	tgfx->dev[i] = input_dev = input_allocate_device();
	208	if (!input_dev) {
	209	printk(KERN_ERR "turbografx.c: Not enough memory for input device\n");
	210	err = -ENOMEM;
ab52cd66	211	goto err_unreg_devs;
17dd3f0f	212	}
1da177e4	213
17dd3f0f DT	214	tgfx->sticks \|= (1 << i);
	215	snprintf(tgfx->name[i], sizeof(tgfx->name[i]),
	216	"TurboGraFX %d-button Multisystem joystick", n_buttons[i]);
	217	snprintf(tgfx->phys[i], sizeof(tgfx->phys[i]),
	218	"%s/input%d", tgfx->pd->port->name, i);
1da177e4	219
17dd3f0f DT	220	input_dev->name = tgfx->name[i];
	221	input_dev->phys = tgfx->phys[i];
	222	input_dev->id.bustype = BUS_PARPORT;
	223	input_dev->id.vendor = 0x0003;
	224	input_dev->id.product = n_buttons[i];
	225	input_dev->id.version = 0x0100;
1da177e4	226
8715c1cf DT	227	input_set_drvdata(input_dev, tgfx);
8715c1cf DT	228
17dd3f0f DT	229	input_dev->open = tgfx_open;
17dd3f0f DT	230	input_dev->close = tgfx_close;
1da177e4	231
17dd3f0f DT	232	input_dev->evbit[0] = BIT(EV_KEY) \| BIT(EV_ABS);
	233	input_set_abs_params(input_dev, ABS_X, -1, 1, 0, 0);
	234	input_set_abs_params(input_dev, ABS_Y, -1, 1, 0, 0);
1da177e4	235
17dd3f0f DT	236	for (j = 0; j < n_buttons[i]; j++)
17dd3f0f DT	237	set_bit(tgfx_buttons[j], input_dev->keybit);
1da177e4	238
ab52cd66 DT	239	err = input_register_device(tgfx->dev[i]);
	240	if (err)
	241	goto err_free_dev;
17dd3f0f	242	}
1da177e4 LT	243
1da177e4 LT	244	if (!tgfx->sticks) {
17dd3f0f DT	245	printk(KERN_ERR "turbografx.c: No valid devices specified\n");
	246	err = -EINVAL;
	247	goto err_free_tgfx;
1da177e4 LT	248	}
	249
	250	return tgfx;
17dd3f0f	251
ab52cd66 DT	252	err_free_dev:
	253	input_free_device(tgfx->dev[i]);
	254	err_unreg_devs:
17dd3f0f	255	while (--i >= 0)
ab52cd66 DT	256	if (tgfx->dev[i])
ab52cd66 DT	257	input_unregister_device(tgfx->dev[i]);
17dd3f0f DT	258	err_free_tgfx:
	259	kfree(tgfx);
	260	err_unreg_pardev:
	261	parport_unregister_device(pd);
	262	err_put_pp:
	263	parport_put_port(pp);
	264	err_out:
	265	return ERR_PTR(err);
	266	}
	267
ab52cd66	268	static void tgfx_remove(struct tgfx *tgfx)
17dd3f0f DT	269	{
	270	int i;
	271
	272	for (i = 0; i < TGFX_MAX_DEVICES; i++)
	273	if (tgfx->dev[i])
	274	input_unregister_device(tgfx->dev[i]);
	275	parport_unregister_device(tgfx->pd);
	276	kfree(tgfx);
1da177e4 LT	277	}
	278
	279	static int __init tgfx_init(void)
	280	{
17dd3f0f DT	281	int i;
	282	int have_dev = 0;
	283	int err = 0;
	284
	285	for (i = 0; i < TGFX_MAX_PORTS; i++) {
	286	if (tgfx[i].nargs == 0 \|\| tgfx[i].args[0] < 0)
	287	continue;
	288
	289	if (tgfx[i].nargs < 2) {
	290	printk(KERN_ERR "turbografx.c: at least one joystick must be specified\n");
	291	err = -EINVAL;
	292	break;
	293	}
	294
	295	tgfx_base[i] = tgfx_probe(tgfx[i].args[0], tgfx[i].args + 1, tgfx[i].nargs - 1);
	296	if (IS_ERR(tgfx_base[i])) {
	297	err = PTR_ERR(tgfx_base[i]);
	298	break;
	299	}
	300
	301	have_dev = 1;
	302	}
1da177e4	303
17dd3f0f DT	304	if (err) {
17dd3f0f DT	305	while (--i >= 0)
ab52cd66 DT	306	if (tgfx_base[i])
ab52cd66 DT	307	tgfx_remove(tgfx_base[i]);
17dd3f0f DT	308	return err;
17dd3f0f DT	309	}
1da177e4	310
17dd3f0f	311	return have_dev ? 0 : -ENODEV;
1da177e4 LT	312	}
	313
	314	static void __exit tgfx_exit(void)
	315	{
17dd3f0f	316	int i;
1da177e4	317
17dd3f0f DT	318	for (i = 0; i < TGFX_MAX_PORTS; i++)
	319	if (tgfx_base[i])
	320	tgfx_remove(tgfx_base[i]);
1da177e4 LT	321	}
	322
	323	module_init(tgfx_init);
	324	module_exit(tgfx_exit);