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