1/*
2 *  Atari mouse driver for Linux/m68k
3 *
4 *  Copyright (c) 2005 Michael Schmitz
5 *
6 *  Based on:
7 *  Amiga mouse driver for Linux/m68k
8 *
9 *  Copyright (c) 2000-2002 Vojtech Pavlik
10 *
11 */
12/*
13 * The low level init and interrupt stuff is handled in arch/mm68k/atari/atakeyb.c
14 * (the keyboard ACIA also handles the mouse and joystick data, and the keyboard
15 * interrupt is shared with the MIDI ACIA so MIDI data also get handled there).
16 * This driver only deals with handing key events off to the input layer.
17 *
18 * Largely based on the old:
19 *
20 * Atari Mouse Driver for Linux
21 * by Robert de Vries (robert@and.nl) 19Jul93
22 *
23 * 16 Nov 1994 Andreas Schwab
24 * Compatibility with busmouse
25 * Support for three button mouse (shamelessly stolen from MiNT)
26 * third button wired to one of the joystick directions on joystick 1
27 *
28 * 1996/02/11 Andreas Schwab
29 * Module support
30 * Allow multiple open's
31 *
32 * Converted to use new generic busmouse code.  5 Apr 1998
33 *   Russell King <rmk@arm.uk.linux.org>
34 */
35
36
37/*
38 * This program is free software; you can redistribute it and/or modify it
39 * under the terms of the GNU General Public License version 2 as published by
40 * the Free Software Foundation
41 */
42
43#include <linux/module.h>
44#include <linux/init.h>
45#include <linux/input.h>
46#include <linux/interrupt.h>
47
48#include <asm/irq.h>
49#include <asm/setup.h>
50#include <asm/system.h>
51#include <asm/uaccess.h>
52#include <asm/atarihw.h>
53#include <asm/atarikb.h>
54#include <asm/atariints.h>
55
56MODULE_AUTHOR("Michael Schmitz <schmitz@biophys.uni-duesseldorf.de>");
57MODULE_DESCRIPTION("Atari mouse driver");
58MODULE_LICENSE("GPL");
59
60static int mouse_threshold[2] = {2,2};
61
62#ifdef __MODULE__
63MODULE_PARM(mouse_threshold, "2i");
64#endif
65#ifdef FIXED_ATARI_JOYSTICK
66extern int atari_mouse_buttons;
67#endif
68static int atamouse_used = 0;
69
70static struct input_dev *atamouse_dev;
71
72static void atamouse_interrupt(char *buf)
73{
74	int buttons, dx, dy;
75
76/*	ikbd_mouse_disable(); */
77
78	buttons = (buf[0] & 1) | ((buf[0] & 2) << 1);
79#ifdef FIXED_ATARI_JOYSTICK
80	buttons |= atari_mouse_buttons & 2;
81	atari_mouse_buttons = buttons;
82#endif
83/*	ikbd_mouse_rel_pos(); */
84
85	/* only relative events get here */
86	dx =  buf[1];
87	dy = -buf[2];
88
89	input_report_rel(atamouse_dev, REL_X, dx);
90	input_report_rel(atamouse_dev, REL_Y, dy);
91
92	input_report_key(atamouse_dev, BTN_LEFT,   buttons & 0x1);
93	input_report_key(atamouse_dev, BTN_MIDDLE, buttons & 0x2);
94	input_report_key(atamouse_dev, BTN_RIGHT,  buttons & 0x4);
95
96	input_sync(atamouse_dev);
97
98	return;
99}
100
101static int atamouse_open(struct input_dev *dev)
102{
103	if (atamouse_used++)
104		return 0;
105
106#ifdef FIXED_ATARI_JOYSTICK
107	atari_mouse_buttons = 0;
108#endif
109	ikbd_mouse_y0_top();
110	ikbd_mouse_thresh(mouse_threshold[0], mouse_threshold[1]);
111	ikbd_mouse_rel_pos();
112	atari_input_mouse_interrupt_hook = atamouse_interrupt;
113	return 0;
114}
115
116static void atamouse_close(struct input_dev *dev)
117{
118	if (!--atamouse_used) {
119		ikbd_mouse_disable();
120		atari_mouse_interrupt_hook = NULL;
121	}
122}
123
124static int __init atamouse_init(void)
125{
126	if (!MACH_IS_ATARI || !ATARIHW_PRESENT(ST_MFP))
127		return -ENODEV;
128
129	if (!(atamouse_dev = input_allocate_device()))
130		return -ENOMEM;
131
132	if (!(atari_keyb_init()))
133		return -ENODEV;
134
135	atamouse_dev->name = "Atari mouse";
136	atamouse_dev->phys = "atamouse/input0";
137	atamouse_dev->id.bustype = BUS_ATARI;
138	atamouse_dev->id.vendor = 0x0001;
139	atamouse_dev->id.product = 0x0002;
140	atamouse_dev->id.version = 0x0100;
141
142	atamouse_dev->evbit[0] = BIT(EV_KEY) | BIT(EV_REL);
143	atamouse_dev->relbit[0] = BIT(REL_X) | BIT(REL_Y);
144	atamouse_dev->keybit[LONG(BTN_LEFT)] = BIT(BTN_LEFT) | BIT(BTN_MIDDLE) | BIT(BTN_RIGHT);
145	atamouse_dev->open = atamouse_open;
146	atamouse_dev->close = atamouse_close;
147
148	input_register_device(atamouse_dev);
149
150	printk(KERN_INFO "input: %s at keyboard ACIA\n", atamouse_dev->name);
151	return 0;
152}
153
154static void __exit atamouse_exit(void)
155{
156	input_unregister_device(atamouse_dev);
157}
158
159module_init(atamouse_init);
160module_exit(atamouse_exit);
161