aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/input/mouse/atarimouse.c
blob: 5c4a692bf73aee120aaf928fb2d33104f51dea65 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
/*
 *  Atari mouse driver for Linux/m68k
 *
 *  Copyright (c) 2005 Michael Schmitz
 *
 *  Based on:
 *  Amiga mouse driver for Linux/m68k
 *
 *  Copyright (c) 2000-2002 Vojtech Pavlik
 *
 */
/*
 * The low level init and interrupt stuff is handled in arch/mm68k/atari/atakeyb.c
 * (the keyboard ACIA also handles the mouse and joystick data, and the keyboard
 * interrupt is shared with the MIDI ACIA so MIDI data also get handled there).
 * This driver only deals with handing key events off to the input layer.
 *
 * Largely based on the old:
 *
 * Atari Mouse Driver for Linux
 * by Robert de Vries (robert@and.nl) 19Jul93
 *
 * 16 Nov 1994 Andreas Schwab
 * Compatibility with busmouse
 * Support for three button mouse (shamelessly stolen from MiNT)
 * third button wired to one of the joystick directions on joystick 1
 *
 * 1996/02/11 Andreas Schwab
 * Module support
 * Allow multiple open's
 *
 * Converted to use new generic busmouse code.  5 Apr 1998
 *   Russell King <rmk@arm.uk.linux.org>
 */


/*
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 as published by
 * the Free Software Foundation
 */

#include <linux/module.h>
#include <linux/init.h>
#include <linux/input.h>
#include <linux/interrupt.h>

#include <asm/irq.h>
#include <asm/setup.h>
#include <asm/system.h>
#include <asm/uaccess.h>
#include <asm/atarihw.h>
#include <asm/atarikb.h>
#include <asm/atariints.h>

MODULE_AUTHOR("Michael Schmitz <schmitz@biophys.uni-duesseldorf.de>");
MODULE_DESCRIPTION("Atari mouse driver");
MODULE_LICENSE("GPL");

static int mouse_threshold[2] = {2, 2};
module_param_array(mouse_threshold, int, NULL, 0);

#ifdef FIXED_ATARI_JOYSTICK
extern int atari_mouse_buttons;
#endif

static struct input_dev *atamouse_dev;

static void atamouse_interrupt(char *buf)
{
	int buttons, dx, dy;

	buttons = (buf[0] & 1) | ((buf[0] & 2) << 1);
#ifdef FIXED_ATARI_JOYSTICK
	buttons |= atari_mouse_buttons & 2;
	atari_mouse_buttons = buttons;
#endif

	/* only relative events get here */
	dx = buf[1];
	dy = buf[2];

	input_report_rel(atamouse_dev, REL_X, dx);
	input_report_rel(atamouse_dev, REL_Y, dy);

	input_report_key(atamouse_dev, BTN_LEFT,   buttons & 0x4);
	input_report_key(atamouse_dev, BTN_MIDDLE, buttons & 0x2);
	input_report_key(atamouse_dev, BTN_RIGHT,  buttons & 0x1);

	input_sync(atamouse_dev);

	return;
}

static int atamouse_open(struct input_dev *dev)
{
#ifdef FIXED_ATARI_JOYSTICK
	atari_mouse_buttons = 0;
#endif
	ikbd_mouse_y0_top();
	ikbd_mouse_thresh(mouse_threshold[0], mouse_threshold[1]);
	ikbd_mouse_rel_pos();
	atari_input_mouse_interrupt_hook = atamouse_interrupt;

	return 0;
}

static void atamouse_close(struct input_dev *dev)
{
	ikbd_mouse_disable();
	atari_input_mouse_interrupt_hook = NULL;
}

static int __init atamouse_init(void)
{
	int error;

	if (!MACH_IS_ATARI || !ATARIHW_PRESENT(ST_MFP))
		return -ENODEV;

	error = atari_keyb_init();
	if (error)
		return error;

	atamouse_dev = input_allocate_device();
	if (!atamouse_dev)
		return -ENOMEM;

	atamouse_dev->name = "Atari mouse";
	atamouse_dev->phys = "atamouse/input0";
	atamouse_dev->id.bustype = BUS_HOST;
	atamouse_dev->id.vendor = 0x0001;
	atamouse_dev->id.product = 0x0002;
	atamouse_dev->id.version = 0x0100;

	atamouse_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REL);
	atamouse_dev->relbit[0] = BIT_MASK(REL_X) | BIT_MASK(REL_Y);
	atamouse_dev->keybit[BIT_WORD(BTN_LEFT)] = BIT_MASK(BTN_LEFT) |
		BIT_MASK(BTN_MIDDLE) | BIT_MASK(BTN_RIGHT);

	atamouse_dev->open = atamouse_open;
	atamouse_dev->close = atamouse_close;

	error = input_register_device(atamouse_dev);
	if (error) {
		input_free_device(atamouse_dev);
		return error;
	}

	return 0;
}

static void __exit atamouse_exit(void)
{
	input_unregister_device(atamouse_dev);
}

module_init(atamouse_init);
module_exit(atamouse_exit);