xref: /openbmc/linux/drivers/input/joystick/amijoy.c (revision b34e08d5)
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 
41 MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
42 MODULE_DESCRIPTION("Driver for Amiga joysticks");
43 MODULE_LICENSE("GPL");
44 
45 static int amijoy[2] = { 0, 1 };
46 module_param_array_named(map, amijoy, uint, NULL, 0);
47 MODULE_PARM_DESC(map, "Map of attached joysticks in form of <a>,<b> (default is 0,1)");
48 
49 static int amijoy_used;
50 static DEFINE_MUTEX(amijoy_mutex);
51 static struct input_dev *amijoy_dev[2];
52 static char *amijoy_phys[2] = { "amijoy/input0", "amijoy/input1" };
53 
54 static 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 
77 static 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++;
92 out:
93 	mutex_unlock(&amijoy_mutex);
94 	return err;
95 }
96 
97 static 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 
105 static int __init amijoy_init(void)
106 {
107 	int i, j;
108 	int err;
109 
110 	if (!MACH_IS_AMIGA)
111 		return -ENODEV;
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 			input_set_abs_params(amijoy_dev[i], ABS_X + j,
145 					     -1, 1, 0, 0);
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 
164 static 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 
175 module_init(amijoy_init);
176 module_exit(amijoy_exit);
177