1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * Copyright (c) 1998-2001 Vojtech Pavlik
7 * Driver for Amiga joysticks for Linux/m68k
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>
19 #include <asm/amigahw.h>
20 #include <asm/amigaints.h>
22 MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
23 MODULE_DESCRIPTION("Driver for Amiga joysticks");
24 MODULE_LICENSE("GPL");
26 static int amijoy[2] = { 0, 1 };
27 module_param_array_named(map, amijoy, uint, NULL, 0);
28 MODULE_PARM_DESC(map, "Map of attached joysticks in form of <a>,<b> (default is 0,1)");
30 static int amijoy_used;
31 static DEFINE_MUTEX(amijoy_mutex);
32 static struct input_dev *amijoy_dev[2];
33 static char *amijoy_phys[2] = { "amijoy/input0", "amijoy/input1" };
35 static irqreturn_t amijoy_interrupt(int irq, void *dummy)
37 int i, data = 0, button = 0;
39 for (i = 0; i < 2; 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;
47 input_report_key(amijoy_dev[i], BTN_TRIGGER, button);
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));
53 input_sync(amijoy_dev[i]);
58 static int amijoy_open(struct input_dev *dev)
62 err = mutex_lock_interruptible(&amijoy_mutex);
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);
74 mutex_unlock(&amijoy_mutex);
78 static void amijoy_close(struct input_dev *dev)
80 mutex_lock(&amijoy_mutex);
82 free_irq(IRQ_AMIGA_VERTB, amijoy_interrupt);
83 mutex_unlock(&amijoy_mutex);
86 static int __init amijoy_init(void)
94 for (i = 0; i < 2; i++) {
98 amijoy_dev[i] = input_allocate_device();
104 if (!request_mem_region(CUSTOM_PHYSADDR + 10 + i * 2, 2, "amijoy [Denise]")) {
105 input_free_device(amijoy_dev[i]);
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;
117 amijoy_dev[i]->open = amijoy_open;
118 amijoy_dev[i]->close = amijoy_close;
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,
129 err = input_register_device(amijoy_dev[i]);
131 input_free_device(amijoy_dev[i]);
137 fail: while (--i >= 0)
139 input_unregister_device(amijoy_dev[i]);
140 release_mem_region(CUSTOM_PHYSADDR + 10 + i * 2, 2);
145 static void __exit amijoy_exit(void)
149 for (i = 0; i < 2; i++)
151 input_unregister_device(amijoy_dev[i]);
152 release_mem_region(CUSTOM_PHYSADDR + 10 + i * 2, 2);
156 module_init(amijoy_init);
157 module_exit(amijoy_exit);