1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * Copyright (c) 1998-2001 Vojtech Pavlik
4 */
5
6 /*
7 * Driver for Amiga joysticks for Linux/m68k
8 */
9
10 /*
11 */
12
13 #include <linux/types.h>
14 #include <linux/errno.h>
15 #include <linux/kernel.h>
16 #include <linux/module.h>
17 #include <linux/init.h>
18 #include <linux/input.h>
19 #include <linux/interrupt.h>
20 #include <linux/mutex.h>
21
22 #include <asm/amigahw.h>
23 #include <asm/amigaints.h>
24
25 MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
26 MODULE_DESCRIPTION("Driver for Amiga joysticks");
27 MODULE_LICENSE("GPL");
28
29 static int amijoy[2] = { 0, 1 };
30 module_param_array_named(map, amijoy, uint, NULL, 0);
31 MODULE_PARM_DESC(map, "Map of attached joysticks in form of <a>,<b> (default is 0,1)");
32
33 static int amijoy_used;
34 static DEFINE_MUTEX(amijoy_mutex);
35 static struct input_dev *amijoy_dev[2];
36 static char *amijoy_phys[2] = { "amijoy/input0", "amijoy/input1" };
37
amijoy_interrupt(int irq,void * dummy)38 static irqreturn_t amijoy_interrupt(int irq, void *dummy)
39 {
40 int i, data = 0, button = 0;
41
42 for (i = 0; i < 2; i++)
43 if (amijoy[i]) {
44
45 switch (i) {
46 case 0: data = ~amiga_custom.joy0dat; button = (~ciaa.pra >> 6) & 1; break;
47 case 1: data = ~amiga_custom.joy1dat; button = (~ciaa.pra >> 7) & 1; break;
48 }
49
50 input_report_key(amijoy_dev[i], BTN_TRIGGER, button);
51
52 input_report_abs(amijoy_dev[i], ABS_X, ((data >> 1) & 1) - ((data >> 9) & 1));
53 data = ~(data ^ (data << 1));
54 input_report_abs(amijoy_dev[i], ABS_Y, ((data >> 1) & 1) - ((data >> 9) & 1));
55
56 input_sync(amijoy_dev[i]);
57 }
58 return IRQ_HANDLED;
59 }
60
amijoy_open(struct input_dev * dev)61 static int amijoy_open(struct input_dev *dev)
62 {
63 int err;
64
65 err = mutex_lock_interruptible(&amijoy_mutex);
66 if (err)
67 return err;
68
69 if (!amijoy_used && request_irq(IRQ_AMIGA_VERTB, amijoy_interrupt, 0, "amijoy", amijoy_interrupt)) {
70 printk(KERN_ERR "amijoy.c: Can't allocate irq %d\n", IRQ_AMIGA_VERTB);
71 err = -EBUSY;
72 goto out;
73 }
74
75 amijoy_used++;
76 out:
77 mutex_unlock(&amijoy_mutex);
78 return err;
79 }
80
amijoy_close(struct input_dev * dev)81 static void amijoy_close(struct input_dev *dev)
82 {
83 mutex_lock(&amijoy_mutex);
84 if (!--amijoy_used)
85 free_irq(IRQ_AMIGA_VERTB, amijoy_interrupt);
86 mutex_unlock(&amijoy_mutex);
87 }
88
amijoy_init(void)89 static int __init amijoy_init(void)
90 {
91 int i, j;
92 int err;
93
94 if (!MACH_IS_AMIGA)
95 return -ENODEV;
96
97 for (i = 0; i < 2; i++) {
98 if (!amijoy[i])
99 continue;
100
101 amijoy_dev[i] = input_allocate_device();
102 if (!amijoy_dev[i]) {
103 err = -ENOMEM;
104 goto fail;
105 }
106
107 if (!request_mem_region(CUSTOM_PHYSADDR + 10 + i * 2, 2, "amijoy [Denise]")) {
108 input_free_device(amijoy_dev[i]);
109 err = -EBUSY;
110 goto fail;
111 }
112
113 amijoy_dev[i]->name = "Amiga joystick";
114 amijoy_dev[i]->phys = amijoy_phys[i];
115 amijoy_dev[i]->id.bustype = BUS_AMIGA;
116 amijoy_dev[i]->id.vendor = 0x0001;
117 amijoy_dev[i]->id.product = 0x0003;
118 amijoy_dev[i]->id.version = 0x0100;
119
120 amijoy_dev[i]->open = amijoy_open;
121 amijoy_dev[i]->close = amijoy_close;
122
123 amijoy_dev[i]->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
124 amijoy_dev[i]->absbit[0] = BIT_MASK(ABS_X) | BIT_MASK(ABS_Y);
125 amijoy_dev[i]->keybit[BIT_WORD(BTN_LEFT)] = BIT_MASK(BTN_LEFT) |
126 BIT_MASK(BTN_MIDDLE) | BIT_MASK(BTN_RIGHT);
127 for (j = 0; j < 2; j++) {
128 input_set_abs_params(amijoy_dev[i], ABS_X + j,
129 -1, 1, 0, 0);
130 }
131
132 err = input_register_device(amijoy_dev[i]);
133 if (err) {
134 input_free_device(amijoy_dev[i]);
135 goto fail;
136 }
137 }
138 return 0;
139
140 fail: while (--i >= 0)
141 if (amijoy[i]) {
142 input_unregister_device(amijoy_dev[i]);
143 release_mem_region(CUSTOM_PHYSADDR + 10 + i * 2, 2);
144 }
145 return err;
146 }
147
amijoy_exit(void)148 static void __exit amijoy_exit(void)
149 {
150 int i;
151
152 for (i = 0; i < 2; i++)
153 if (amijoy[i]) {
154 input_unregister_device(amijoy_dev[i]);
155 release_mem_region(CUSTOM_PHYSADDR + 10 + i * 2, 2);
156 }
157 }
158
159 module_init(amijoy_init);
160 module_exit(amijoy_exit);
161
