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
56 MODULE_AUTHOR("Michael Schmitz <schmitz@biophys.uni-duesseldorf.de>");
57 MODULE_DESCRIPTION("Atari mouse driver");
58 MODULE_LICENSE("GPL");
59
60 static int mouse_threshold[2] = {2,2};
61
62 #ifdef __MODULE__
63 MODULE_PARM(mouse_threshold, "2i");
64 #endif
65 #ifdef FIXED_ATARI_JOYSTICK
66 extern int atari_mouse_buttons;
67 #endif
68 static int atamouse_used = 0;
69
70 static struct input_dev *atamouse_dev;
71
72 static void atamouse_interrupt(char *buf)
73 {
74 int buttons, dx, dy;
75
76 buttons = (buf[0] & 1) | ((buf[0] & 2) << 1);
77 #ifdef FIXED_ATARI_JOYSTICK
78 buttons |= atari_mouse_buttons & 2;
79 atari_mouse_buttons = buttons;
80 #endif
81
82 /* only relative events get here */
83 dx = buf[1];
84 dy = -buf[2];
85
86 input_report_rel(atamouse_dev, REL_X, dx);
87 input_report_rel(atamouse_dev, REL_Y, dy);
88
89 input_report_key(atamouse_dev, BTN_LEFT, buttons & 0x1);
90 input_report_key(atamouse_dev, BTN_MIDDLE, buttons & 0x2);
91 input_report_key(atamouse_dev, BTN_RIGHT, buttons & 0x4);
92
93 input_sync(atamouse_dev);
94
95 return;
96 }
97
98 static int atamouse_open(struct input_dev *dev)
99 {
100 if (atamouse_used++)
101 return 0;
102
103 #ifdef FIXED_ATARI_JOYSTICK
104 atari_mouse_buttons = 0;
105 #endif
106 ikbd_mouse_y0_top();
107 ikbd_mouse_thresh(mouse_threshold[0], mouse_threshold[1]);
108 ikbd_mouse_rel_pos();
109 atari_input_mouse_interrupt_hook = atamouse_interrupt;
110 return 0;
111 }
112
113 static void atamouse_close(struct input_dev *dev)
114 {
115 if (!--atamouse_used) {
116 ikbd_mouse_disable();
117 atari_mouse_interrupt_hook = NULL;
118 }
119 }
120
121 static int __init atamouse_init(void)
122 {
123 if (!MACH_IS_ATARI || !ATARIHW_PRESENT(ST_MFP))
124 return -ENODEV;
125
126 if (!(atari_keyb_init()))
127 return -ENODEV;
128
129 atamouse_dev = input_allocate_device();
130 if (!atamouse_dev)
131 return -ENOMEM;
132
133 atamouse_dev->name = "Atari mouse";
134 atamouse_dev->phys = "atamouse/input0";
135 atamouse_dev->id.bustype = BUS_HOST;
136 atamouse_dev->id.vendor = 0x0001;
137 atamouse_dev->id.product = 0x0002;
138 atamouse_dev->id.version = 0x0100;
139
140 atamouse_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REL);
141 atamouse_dev->relbit[0] = BIT_MASK(REL_X) | BIT_MASK(REL_Y);
142 atamouse_dev->keybit[BIT_WORD(BTN_LEFT)] = BIT_MASK(BTN_LEFT) |
143 BIT_MASK(BTN_MIDDLE) | BIT_MASK(BTN_RIGHT);
144 atamouse_dev->open = atamouse_open;
145 atamouse_dev->close = atamouse_close;
146
147 if (input_register_device(atamouse_dev)) {
148 input_free_device(atamouse_dev);
149 return -ENOMEM;
150 }
151
152 return 0;
153 }
154
155 static void __exit atamouse_exit(void)
156 {
157 input_unregister_device(atamouse_dev);
158 }
159
160 module_init(atamouse_init);
161 module_exit(atamouse_exit);
162
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