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/uaccess.h>
51#include <asm/atarihw.h>
52#include <asm/atarikb.h>
53#include <asm/atariints.h>
54
55MODULE_AUTHOR("Michael Schmitz <schmitz@biophys.uni-duesseldorf.de>");
56MODULE_DESCRIPTION("Atari mouse driver");
57MODULE_LICENSE("GPL");
58
59static int mouse_threshold[2] = {2, 2};
60module_param_array(mouse_threshold, int, NULL, 0);
61
62#ifdef FIXED_ATARI_JOYSTICK
63extern int atari_mouse_buttons;
64#endif
65
66static struct input_dev *atamouse_dev;
67
68static void atamouse_interrupt(char *buf)
69{
70	int buttons, dx, dy;
71
72	buttons = (buf[0] & 1) | ((buf[0] & 2) << 1);
73#ifdef FIXED_ATARI_JOYSTICK
74	buttons |= atari_mouse_buttons & 2;
75	atari_mouse_buttons = buttons;
76#endif
77
78	/* only relative events get here */
79	dx = buf[1];
80	dy = buf[2];
81
82	input_report_rel(atamouse_dev, REL_X, dx);
83	input_report_rel(atamouse_dev, REL_Y, dy);
84
85	input_report_key(atamouse_dev, BTN_LEFT,   buttons & 0x4);
86	input_report_key(atamouse_dev, BTN_MIDDLE, buttons & 0x2);
87	input_report_key(atamouse_dev, BTN_RIGHT,  buttons & 0x1);
88
89	input_sync(atamouse_dev);
90
91	return;
92}
93
94static int atamouse_open(struct input_dev *dev)
95{
96#ifdef FIXED_ATARI_JOYSTICK
97	atari_mouse_buttons = 0;
98#endif
99	ikbd_mouse_y0_top();
100	ikbd_mouse_thresh(mouse_threshold[0], mouse_threshold[1]);
101	ikbd_mouse_rel_pos();
102	atari_input_mouse_interrupt_hook = atamouse_interrupt;
103
104	return 0;
105}
106
107static void atamouse_close(struct input_dev *dev)
108{
109	ikbd_mouse_disable();
110	atari_input_mouse_interrupt_hook = NULL;
111}
112
113static int __init atamouse_init(void)
114{
115	int error;
116
117	if (!MACH_IS_ATARI || !ATARIHW_PRESENT(ST_MFP))
118		return -ENODEV;
119
120	error = atari_keyb_init();
121	if (error)
122		return error;
123
124	atamouse_dev = input_allocate_device();
125	if (!atamouse_dev)
126		return -ENOMEM;
127
128	atamouse_dev->name = "Atari mouse";
129	atamouse_dev->phys = "atamouse/input0";
130	atamouse_dev->id.bustype = BUS_HOST;
131	atamouse_dev->id.vendor = 0x0001;
132	atamouse_dev->id.product = 0x0002;
133	atamouse_dev->id.version = 0x0100;
134
135	atamouse_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REL);
136	atamouse_dev->relbit[0] = BIT_MASK(REL_X) | BIT_MASK(REL_Y);
137	atamouse_dev->keybit[BIT_WORD(BTN_LEFT)] = BIT_MASK(BTN_LEFT) |
138		BIT_MASK(BTN_MIDDLE) | BIT_MASK(BTN_RIGHT);
139
140	atamouse_dev->open = atamouse_open;
141	atamouse_dev->close = atamouse_close;
142
143	error = input_register_device(atamouse_dev);
144	if (error) {
145		input_free_device(atamouse_dev);
146		return error;
147	}
148
149	return 0;
150}
151
152static void __exit atamouse_exit(void)
153{
154	input_unregister_device(atamouse_dev);
155}
156
157module_init(atamouse_init);
158module_exit(atamouse_exit);
159