2 * Amiga mouse driver for Linux/m68k
4 * Copyright (c) 2000-2002 Vojtech Pavlik
6 * Based on the work of:
7 * Michael Rausch James Banks
8 * Matther Dillon David Giller
9 * Nathan Laredo Linus Torvalds
10 * Johan Myreen Jes Sorensen
15 * This program is free software; you can redistribute it and/or modify it
16 * under the terms of the GNU General Public License version 2 as published by
17 * the Free Software Foundation
20 #include <linux/module.h>
21 #include <linux/init.h>
22 #include <linux/input.h>
23 #include <linux/interrupt.h>
26 #include <asm/setup.h>
27 #include <asm/system.h>
28 #include <asm/uaccess.h>
29 #include <asm/amigahw.h>
30 #include <asm/amigaints.h>
32 MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
33 MODULE_DESCRIPTION("Amiga mouse driver");
34 MODULE_LICENSE("GPL");
36 static int amimouse_used = 0;
37 static int amimouse_lastx, amimouse_lasty;
38 static struct input_dev amimouse_dev;
40 static char *amimouse_name = "Amiga mouse";
41 static char *amimouse_phys = "amimouse/input0";
43 static irqreturn_t amimouse_interrupt(int irq, void *dummy, struct pt_regs *fp)
45 unsigned short joy0dat, potgor;
48 joy0dat = custom.joy0dat;
53 dx = nx - amimouse_lastx;
54 dy = ny - amimouse_lasty;
56 if (dx < -127) dx = (256 + nx) - amimouse_lastx;
57 if (dx > 127) dx = (nx - 256) - amimouse_lastx;
58 if (dy < -127) dy = (256 + ny) - amimouse_lasty;
59 if (dy > 127) dy = (ny - 256) - amimouse_lasty;
64 potgor = custom.potgor;
66 input_regs(&amimouse_dev, fp);
68 input_report_rel(&amimouse_dev, REL_X, dx);
69 input_report_rel(&amimouse_dev, REL_Y, dy);
71 input_report_key(&amimouse_dev, BTN_LEFT, ciaa.pra & 0x40);
72 input_report_key(&amimouse_dev, BTN_MIDDLE, potgor & 0x0100);
73 input_report_key(&amimouse_dev, BTN_RIGHT, potgor & 0x0400);
75 input_sync(&amimouse_dev);
80 static int amimouse_open(struct input_dev *dev)
82 unsigned short joy0dat;
87 joy0dat = custom.joy0dat;
89 amimouse_lastx = joy0dat & 0xff;
90 amimouse_lasty = joy0dat >> 8;
92 if (request_irq(IRQ_AMIGA_VERTB, amimouse_interrupt, 0, "amimouse", amimouse_interrupt)) {
94 printk(KERN_ERR "amimouse.c: Can't allocate irq %d\n", IRQ_AMIGA_VERTB);
101 static void amimouse_close(struct input_dev *dev)
103 if (!--amimouse_used)
104 free_irq(IRQ_AMIGA_VERTB, amimouse_interrupt);
107 static int __init amimouse_init(void)
109 if (!MACH_IS_AMIGA || !AMIGAHW_PRESENT(AMI_MOUSE))
112 amimouse_dev.evbit[0] = BIT(EV_KEY) | BIT(EV_REL);
113 amimouse_dev.relbit[0] = BIT(REL_X) | BIT(REL_Y);
114 amimouse_dev.keybit[LONG(BTN_LEFT)] = BIT(BTN_LEFT) | BIT(BTN_MIDDLE) | BIT(BTN_RIGHT);
115 amimouse_dev.open = amimouse_open;
116 amimouse_dev.close = amimouse_close;
118 amimouse_dev.name = amimouse_name;
119 amimouse_dev.phys = amimouse_phys;
120 amimouse_dev.id.bustype = BUS_AMIGA;
121 amimouse_dev.id.vendor = 0x0001;
122 amimouse_dev.id.product = 0x0002;
123 amimouse_dev.id.version = 0x0100;
125 input_register_device(&amimouse_dev);
127 printk(KERN_INFO "input: %s at joy0dat\n", amimouse_name);
131 static void __exit amimouse_exit(void)
133 input_unregister_device(&amimouse_dev);
136 module_init(amimouse_init);
137 module_exit(amimouse_exit);