amijoy.c revision 9ffc93f203c18a70623f21950f1dd473c9ec48cd 
1/*
2 *  Copyright (c) 1998-2001 Vojtech Pavlik
3 */
4
5/*
6 * Driver for Amiga joysticks for Linux/m68k
7 */
8
9/*
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or
13 * (at your option) any later version.
14 *
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
18 * GNU General Public License for more details.
19 *
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23 *
24 * Should you need to contact me, the author, you can do so either by
25 * e-mail - mail your message to <vojtech@ucw.cz>, or by paper mail:
26 * Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic
27 */
28
29#include <linux/types.h>
30#include <linux/errno.h>
31#include <linux/kernel.h>
32#include <linux/module.h>
33#include <linux/init.h>
34#include <linux/input.h>
35#include <linux/interrupt.h>
36#include <linux/mutex.h>
37
38#include <asm/amigahw.h>
39#include <asm/amigaints.h>
40
41MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
42MODULE_DESCRIPTION("Driver for Amiga joysticks");
43MODULE_LICENSE("GPL");
44
45static int amijoy[2] = { 0, 1 };
46module_param_array_named(map, amijoy, uint, NULL, 0);
47MODULE_PARM_DESC(map, "Map of attached joysticks in form of <a>,<b> (default is 0,1)");
48
49static int amijoy_used;
50static DEFINE_MUTEX(amijoy_mutex);
51static struct input_dev *amijoy_dev[2];
52static char *amijoy_phys[2] = { "amijoy/input0", "amijoy/input1" };
53
54static irqreturn_t amijoy_interrupt(int irq, void *dummy)
55{
56	int i, data = 0, button = 0;
57
58	for (i = 0; i < 2; i++)
59		if (amijoy[i]) {
60
61			switch (i) {
62				case 0: data = ~amiga_custom.joy0dat; button = (~ciaa.pra >> 6) & 1; break;
63				case 1: data = ~amiga_custom.joy1dat; button = (~ciaa.pra >> 7) & 1; break;
64			}
65
66			input_report_key(amijoy_dev[i], BTN_TRIGGER, button);
67
68			input_report_abs(amijoy_dev[i], ABS_X, ((data >> 1) & 1) - ((data >> 9) & 1));
69			data = ~(data ^ (data << 1));
70			input_report_abs(amijoy_dev[i], ABS_Y, ((data >> 1) & 1) - ((data >> 9) & 1));
71
72			input_sync(amijoy_dev[i]);
73		}
74	return IRQ_HANDLED;
75}
76
77static int amijoy_open(struct input_dev *dev)
78{
79	int err;
80
81	err = mutex_lock_interruptible(&amijoy_mutex);
82	if (err)
83		return err;
84
85	if (!amijoy_used && request_irq(IRQ_AMIGA_VERTB, amijoy_interrupt, 0, "amijoy", amijoy_interrupt)) {
86		printk(KERN_ERR "amijoy.c: Can't allocate irq %d\n", IRQ_AMIGA_VERTB);
87		err = -EBUSY;
88		goto out;
89	}
90
91	amijoy_used++;
92out:
93	mutex_unlock(&amijoy_mutex);
94	return err;
95}
96
97static void amijoy_close(struct input_dev *dev)
98{
99	mutex_lock(&amijoy_mutex);
100	if (!--amijoy_used)
101		free_irq(IRQ_AMIGA_VERTB, amijoy_interrupt);
102	mutex_unlock(&amijoy_mutex);
103}
104
105static int __init amijoy_init(void)
106{
107	int i, j;
108	int err;
109
110	for (i = 0; i < 2; i++) {
111		if (!amijoy[i])
112			continue;
113
114		amijoy_dev[i] = input_allocate_device();
115		if (!amijoy_dev[i]) {
116			err = -ENOMEM;
117			goto fail;
118		}
119
120		if (!request_mem_region(CUSTOM_PHYSADDR + 10 + i * 2, 2, "amijoy [Denise]")) {
121			input_free_device(amijoy_dev[i]);
122			err = -EBUSY;
123			goto fail;
124		}
125
126		amijoy_dev[i]->name = "Amiga joystick";
127		amijoy_dev[i]->phys = amijoy_phys[i];
128		amijoy_dev[i]->id.bustype = BUS_AMIGA;
129		amijoy_dev[i]->id.vendor = 0x0001;
130		amijoy_dev[i]->id.product = 0x0003;
131		amijoy_dev[i]->id.version = 0x0100;
132
133		amijoy_dev[i]->open = amijoy_open;
134		amijoy_dev[i]->close = amijoy_close;
135
136		amijoy_dev[i]->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
137		amijoy_dev[i]->absbit[0] = BIT_MASK(ABS_X) | BIT_MASK(ABS_Y);
138		amijoy_dev[i]->keybit[BIT_WORD(BTN_LEFT)] = BIT_MASK(BTN_LEFT) |
139			BIT_MASK(BTN_MIDDLE) | BIT_MASK(BTN_RIGHT);
140		for (j = 0; j < 2; j++) {
141			input_set_abs_params(amijoy_dev[i], ABS_X + j,
142					     -1, 1, 0, 0);
143		}
144
145		err = input_register_device(amijoy_dev[i]);
146		if (err) {
147			input_free_device(amijoy_dev[i]);
148			goto fail;
149		}
150	}
151	return 0;
152
153 fail:	while (--i >= 0)
154		if (amijoy[i]) {
155			input_unregister_device(amijoy_dev[i]);
156			release_mem_region(CUSTOM_PHYSADDR + 10 + i * 2, 2);
157		}
158	return err;
159}
160
161static void __exit amijoy_exit(void)
162{
163	int i;
164
165	for (i = 0; i < 2; i++)
166		if (amijoy[i]) {
167			input_unregister_device(amijoy_dev[i]);
168			release_mem_region(CUSTOM_PHYSADDR + 10 + i * 2, 2);
169		}
170}
171
172module_init(amijoy_init);
173module_exit(amijoy_exit);
174