xref: /openbmc/linux/drivers/input/joystick/amijoy.c (revision da2ef666)
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 
25 #include <linux/types.h>
26 #include <linux/errno.h>
27 #include <linux/kernel.h>
28 #include <linux/module.h>
29 #include <linux/init.h>
30 #include <linux/input.h>
31 #include <linux/interrupt.h>
32 #include <linux/mutex.h>
33 
34 #include <asm/amigahw.h>
35 #include <asm/amigaints.h>
36 
37 MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
38 MODULE_DESCRIPTION("Driver for Amiga joysticks");
39 MODULE_LICENSE("GPL");
40 
41 static int amijoy[2] = { 0, 1 };
42 module_param_array_named(map, amijoy, uint, NULL, 0);
43 MODULE_PARM_DESC(map, "Map of attached joysticks in form of <a>,<b> (default is 0,1)");
44 
45 static int amijoy_used;
46 static DEFINE_MUTEX(amijoy_mutex);
47 static struct input_dev *amijoy_dev[2];
48 static char *amijoy_phys[2] = { "amijoy/input0", "amijoy/input1" };
49 
50 static irqreturn_t amijoy_interrupt(int irq, void *dummy)
51 {
52 	int i, data = 0, button = 0;
53 
54 	for (i = 0; i < 2; i++)
55 		if (amijoy[i]) {
56 
57 			switch (i) {
58 				case 0: data = ~amiga_custom.joy0dat; button = (~ciaa.pra >> 6) & 1; break;
59 				case 1: data = ~amiga_custom.joy1dat; button = (~ciaa.pra >> 7) & 1; break;
60 			}
61 
62 			input_report_key(amijoy_dev[i], BTN_TRIGGER, button);
63 
64 			input_report_abs(amijoy_dev[i], ABS_X, ((data >> 1) & 1) - ((data >> 9) & 1));
65 			data = ~(data ^ (data << 1));
66 			input_report_abs(amijoy_dev[i], ABS_Y, ((data >> 1) & 1) - ((data >> 9) & 1));
67 
68 			input_sync(amijoy_dev[i]);
69 		}
70 	return IRQ_HANDLED;
71 }
72 
73 static int amijoy_open(struct input_dev *dev)
74 {
75 	int err;
76 
77 	err = mutex_lock_interruptible(&amijoy_mutex);
78 	if (err)
79 		return err;
80 
81 	if (!amijoy_used && request_irq(IRQ_AMIGA_VERTB, amijoy_interrupt, 0, "amijoy", amijoy_interrupt)) {
82 		printk(KERN_ERR "amijoy.c: Can't allocate irq %d\n", IRQ_AMIGA_VERTB);
83 		err = -EBUSY;
84 		goto out;
85 	}
86 
87 	amijoy_used++;
88 out:
89 	mutex_unlock(&amijoy_mutex);
90 	return err;
91 }
92 
93 static void amijoy_close(struct input_dev *dev)
94 {
95 	mutex_lock(&amijoy_mutex);
96 	if (!--amijoy_used)
97 		free_irq(IRQ_AMIGA_VERTB, amijoy_interrupt);
98 	mutex_unlock(&amijoy_mutex);
99 }
100 
101 static int __init amijoy_init(void)
102 {
103 	int i, j;
104 	int err;
105 
106 	if (!MACH_IS_AMIGA)
107 		return -ENODEV;
108 
109 	for (i = 0; i < 2; i++) {
110 		if (!amijoy[i])
111 			continue;
112 
113 		amijoy_dev[i] = input_allocate_device();
114 		if (!amijoy_dev[i]) {
115 			err = -ENOMEM;
116 			goto fail;
117 		}
118 
119 		if (!request_mem_region(CUSTOM_PHYSADDR + 10 + i * 2, 2, "amijoy [Denise]")) {
120 			input_free_device(amijoy_dev[i]);
121 			err = -EBUSY;
122 			goto fail;
123 		}
124 
125 		amijoy_dev[i]->name = "Amiga joystick";
126 		amijoy_dev[i]->phys = amijoy_phys[i];
127 		amijoy_dev[i]->id.bustype = BUS_AMIGA;
128 		amijoy_dev[i]->id.vendor = 0x0001;
129 		amijoy_dev[i]->id.product = 0x0003;
130 		amijoy_dev[i]->id.version = 0x0100;
131 
132 		amijoy_dev[i]->open = amijoy_open;
133 		amijoy_dev[i]->close = amijoy_close;
134 
135 		amijoy_dev[i]->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
136 		amijoy_dev[i]->absbit[0] = BIT_MASK(ABS_X) | BIT_MASK(ABS_Y);
137 		amijoy_dev[i]->keybit[BIT_WORD(BTN_LEFT)] = BIT_MASK(BTN_LEFT) |
138 			BIT_MASK(BTN_MIDDLE) | BIT_MASK(BTN_RIGHT);
139 		for (j = 0; j < 2; j++) {
140 			input_set_abs_params(amijoy_dev[i], ABS_X + j,
141 					     -1, 1, 0, 0);
142 		}
143 
144 		err = input_register_device(amijoy_dev[i]);
145 		if (err) {
146 			input_free_device(amijoy_dev[i]);
147 			goto fail;
148 		}
149 	}
150 	return 0;
151 
152  fail:	while (--i >= 0)
153 		if (amijoy[i]) {
154 			input_unregister_device(amijoy_dev[i]);
155 			release_mem_region(CUSTOM_PHYSADDR + 10 + i * 2, 2);
156 		}
157 	return err;
158 }
159 
160 static void __exit amijoy_exit(void)
161 {
162 	int i;
163 
164 	for (i = 0; i < 2; i++)
165 		if (amijoy[i]) {
166 			input_unregister_device(amijoy_dev[i]);
167 			release_mem_region(CUSTOM_PHYSADDR + 10 + i * 2, 2);
168 		}
169 }
170 
171 module_init(amijoy_init);
172 module_exit(amijoy_exit);
173