tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * $Id: amijoy.c,v 1.13 2002/01/22 20:26:32 vojtech Exp $
3 *
4 * Copyright (c) 1998-2001 Vojtech Pavlik
5 */
6
7/*
8 * Driver for Amiga joysticks for Linux/m68k
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/types.h>
32#include <linux/errno.h>
33#include <linux/kernel.h>
34#include <linux/module.h>
35#include <linux/init.h>
36#include <linux/input.h>
37#include <linux/interrupt.h>
38#include <linux/mutex.h>
39
40#include <asm/system.h>
41#include <asm/amigahw.h>
42#include <asm/amigaints.h>
43
44MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
45MODULE_DESCRIPTION("Driver for Amiga joysticks");
46MODULE_LICENSE("GPL");
47
48static int amijoy[2] = { 0, 1 };
49module_param_array_named(map, amijoy, uint, NULL, 0);
50MODULE_PARM_DESC(map, "Map of attached joysticks in form of <a>,<b> (default is 0,1)");
51
52static int amijoy_used;
53static DEFINE_MUTEX(amijoy_mutex);
54static struct input_dev *amijoy_dev[2];
55static char *amijoy_phys[2] = { "amijoy/input0", "amijoy/input1" };
56
57static irqreturn_t amijoy_interrupt(int irq, void *dummy)
58{
59 int i, data = 0, button = 0;
60
61 for (i = 0; i < 2; i++)
62 if (amijoy[i]) {
63
64 switch (i) {
65 case 0: data = ~amiga_custom.joy0dat; button = (~ciaa.pra >> 6) & 1; break;
66 case 1: data = ~amiga_custom.joy1dat; button = (~ciaa.pra >> 7) & 1; break;
67 }
68
69 input_report_key(amijoy_dev[i], BTN_TRIGGER, button);
70
71 input_report_abs(amijoy_dev[i], ABS_X, ((data >> 1) & 1) - ((data >> 9) & 1));
72 data = ~(data ^ (data << 1));
73 input_report_abs(amijoy_dev[i], ABS_Y, ((data >> 1) & 1) - ((data >> 9) & 1));
74
75 input_sync(amijoy_dev[i]);
76 }
77 return IRQ_HANDLED;
78}
79
80static int amijoy_open(struct input_dev *dev)
81{
82 int err;
83
84 err = mutex_lock_interruptible(&amijoy_mutex);
85 if (err)
86 return err;
87
88 if (!amijoy_used && request_irq(IRQ_AMIGA_VERTB, amijoy_interrupt, 0, "amijoy", amijoy_interrupt)) {
89 printk(KERN_ERR "amijoy.c: Can't allocate irq %d\n", IRQ_AMIGA_VERTB);
90 err = -EBUSY;
91 goto out;
92 }
93
94 amijoy_used++;
95out:
96 mutex_unlock(&amijoy_mutex);
97 return err;
98}
99
100static void amijoy_close(struct input_dev *dev)
101{
102 mutex_lock(&amijoy_mutex);
103 if (!--amijoy_used)
104 free_irq(IRQ_AMIGA_VERTB, amijoy_interrupt);
105 mutex_unlock(&amijoy_mutex);
106}
107
108static int __init amijoy_init(void)
109{
110 int i, j;
111 int err;
112
113 for (i = 0; i < 2; i++) {
114 if (!amijoy[i])
115 continue;
116
117 amijoy_dev[i] = input_allocate_device();
118 if (!amijoy_dev[i]) {
119 err = -ENOMEM;
120 goto fail;
121 }
122
123 if (!request_mem_region(CUSTOM_PHYSADDR + 10 + i * 2, 2, "amijoy [Denise]")) {
124 input_free_device(amijoy_dev[i]);
125 err = -EBUSY;
126 goto fail;
127 }
128
129 amijoy_dev[i]->name = "Amiga joystick";
130 amijoy_dev[i]->phys = amijoy_phys[i];
131 amijoy_dev[i]->id.bustype = BUS_AMIGA;
132 amijoy_dev[i]->id.vendor = 0x0001;
133 amijoy_dev[i]->id.product = 0x0003;
134 amijoy_dev[i]->id.version = 0x0100;
135
136 amijoy_dev[i]->open = amijoy_open;
137 amijoy_dev[i]->close = amijoy_close;
138
139 amijoy_dev[i]->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
140 amijoy_dev[i]->absbit[0] = BIT_MASK(ABS_X) | BIT_MASK(ABS_Y);
141 amijoy_dev[i]->keybit[BIT_WORD(BTN_LEFT)] = BIT_MASK(BTN_LEFT) |
142 BIT_MASK(BTN_MIDDLE) | BIT_MASK(BTN_RIGHT);
143 for (j = 0; j < 2; j++) {
144 amijoy_dev[i]->absmin[ABS_X + j] = -1;
145 amijoy_dev[i]->absmax[ABS_X + j] = 1;
146 }
147
148 err = input_register_device(amijoy_dev[i]);
149 if (err) {
150 input_free_device(amijoy_dev[i]);
151 goto fail;
152 }
153 }
154 return 0;
155
156 fail: while (--i >= 0)
157 if (amijoy[i]) {
158 input_unregister_device(amijoy_dev[i]);
159 release_mem_region(CUSTOM_PHYSADDR + 10 + i * 2, 2);
160 }
161 return err;
162}
163
164static void __exit amijoy_exit(void)
165{
166 int i;
167
168 for (i = 0; i < 2; i++)
169 if (amijoy[i]) {
170 input_unregister_device(amijoy_dev[i]);
171 release_mem_region(CUSTOM_PHYSADDR + 10 + i * 2, 2);
172 }
173}
174
175module_init(amijoy_init);
176module_exit(amijoy_exit);