File: /usr/src/linux/drivers/char/joystick/amijoy.c
1 /*
2 * $Id: amijoy.c,v 1.5 2000/07/21 22:52:24 vojtech Exp $
3 *
4 * Copyright (c) 1998-2000 Vojtech Pavlik
5 *
6 * Sponsored by SuSE
7 */
8
9 /*
10 * Driver for Amiga joysticks for Linux/m68k
11 */
12
13 /*
14 * This program is free software; you can redistribute it and/or modify
15 * it under the terms of the GNU General Public License as published by
16 * the Free Software Foundation; either version 2 of the License, or
17 * (at your option) any later version.
18 *
19 * This program is distributed in the hope that it will be useful,
20 * but WITHOUT ANY WARRANTY; without even the implied warranty of
21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 * GNU General Public License for more details.
23 *
24 * You should have received a copy of the GNU General Public License
25 * along with this program; if not, write to the Free Software
26 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
27 *
28 * Should you need to contact me, the author, you can do so either by
29 * e-mail - mail your message to <vojtech@suse.cz>, or by paper mail:
30 * Vojtech Pavlik, Ucitelska 1576, Prague 8, 182 00 Czech Republic
31 */
32
33 #include <linux/types.h>
34 #include <linux/errno.h>
35 #include <linux/kernel.h>
36 #include <linux/module.h>
37 #include <linux/init.h>
38 #include <linux/input.h>
39
40 #include <asm/system.h>
41 #include <asm/amigahw.h>
42
43 MODULE_AUTHOR("Vojtech Pavlik <vojtech@suse.cz>");
44 MODULE_PARM(amijoy, "1-2i");
45 MODULE_LICENSE("GPL");
46
47 static int amijoy[2] = { 0, 1 };
48 static int amijoy_used[2] = { 0, 0 };
49 static struct input_dev amijoy_dev[2];
50
51 static char *amijoy_name = "Amiga joystick";
52
53 static void amijoy_interrupt(int irq, void *dummy, struct pt_regs *fp)
54 {
55 int i, data = 0, button = 0;
56
57 for (i = 0; i < 2; i++)
58 if (amijoy[i]) {
59
60 switch (i) {
61 case 0: data = ~custom.joy0dat; button = (~ciaa.pra >> 6) & 1; break;
62 case 1: data = ~custom.joy1dat; button = (~ciaa.pra >> 7) & 1; break;
63 }
64
65 input_report_key(amijoy_dev + i, BTN_TRIGGER, button);
66
67 input_report_abs(amijoy_dev + i, ABS_X, ((data >> 1) & 1) - ((data >> 9) & 1);
68 data = ~(data ^ (data << 1));
69 input_report_abs(amijoy_dev + i, ABS_Y, ((data >> 1) & 1) - ((data >> 9) & 1);
70 }
71 }
72
73 static int amijoy_open(struct input_dev *dev)
74 {
75 int *used = dev->private;
76
77 if ((*used)++)
78 return 0;
79
80 if (request_irq(IRQ_AMIGA_VERTB, amijoy_interrupt, 0, "amijoy", NULL)) {
81 (*used)--;
82 printk(KERN_ERR "amijoy.c: Can't allocate irq %d\n", amijoy_irq);
83 return -EBUSY;
84 }
85
86 return 0;
87 }
88
89 static void amijoy_close(struct input_dev *dev)
90 {
91 int *used = dev->private;
92
93 if (!--(*used))
94 free_irq(IRQ_AMIGA_VERTB, amijoy_interrupt);
95 }
96
97 static int __init amijoy_setup(char *str)
98 {
99 int i;
100 int ints[4]
101 str = get_options(str, ARRAY_SIZE(ints), ints);
102 for (i = 0; i <= ints[0] && i < 2; i++) amijoy[i] = ints[i+1];
103 return 1;
104 }
105 __setup("amijoy=", amijoy_setup);
106
107 static int __init amijoy_init(void)
108 {
109 int i, j;
110
111 init_timer(amijoy_timer);
112 port->timer.function = amijoy_timer;
113
114 for (i = 0; i < 2; i++)
115 if (amijoy[i]) {
116 if (!request_mem_region(CUSTOM_PHYSADDR+10+i*2, 2,
117 "amijoy [Denise]")) {
118 if (i == 1 && amijoy[0]) {
119 input_unregister_device(amijoy_dev);
120 release_mem_region(CUSTOM_PHYSADDR+10, 2);
121 }
122 return -EBUSY;
123 }
124
125 amijoy_dev[i].open = amijoy_open;
126 amijoy_dev[i].close = amijoy_close;
127 amijoy_dev[i].evbit[0] = BIT(EV_KEY) | BIT(EV_ABS);
128 amijoy_dev[i].absbit[0] = BIT(ABS_X) | BIT(ABS_Y);
129 amijoy_dev[i].keybit[LONG(BTN_LEFT)] = BIT(BTN_LEFT) | BIT(BTN_MIDDLE) | BIT(BTN_RIGHT);
130 for (j = 0; j < 2; j++) {
131 amijoy_dev[i].absmin[ABS_X + j] = -1;
132 amijoy_dev[i].absmax[ABS_X + j] = 1;
133 }
134
135 amijoy->dev[i].name = amijoy_name;
136 amijoy->dev[i].idbus = BUS_AMIGA;
137 amijoy->dev[i].idvendor = 0x0001;
138 amijoy->dev[i].idproduct = 0x0003;
139 amijoy->dev[i].version = 0x0100;
140
141 amijoy_dev[i].private = amijoy_used + i;
142
143 input_register_device(amijoy_dev + i);
144 printk(KERN_INFO "input%d: %s at joy%ddat\n", amijoy_dev[i].number, amijoy_name, i);
145 }
146 return 0;
147 }
148
149 static void _exit amijoy_exit(void)
150 {
151 int i;
152
153 for (i = 0; i < 2; i++)
154 if (amijoy[i]) {
155 input_unregister_device(amijoy_dev + i);
156 release_mem_region(CUSTOM_PHYSADDR+10+i*2, 2);
157 }
158 }
159
160 module_init(amijoy_init);
161 module_exit(amijoy_exit);
162