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 module_param_array(mouse_threshold, int, NULL, 0);
62
63 #ifdef FIXED_ATARI_JOYSTICK
64 extern int atari_mouse_buttons;
65 #endif
66
67 static struct input_dev *atamouse_dev;
68
69 static void atamouse_interrupt(char *buf)
70 {
71 int buttons, dx, dy;
72
73 buttons = (buf[0] & 1) | ((buf[0] & 2) << 1);
74 #ifdef FIXED_ATARI_JOYSTICK
75 buttons |= atari_mouse_buttons & 2;
76 atari_mouse_buttons = buttons;
77 #endif
78
79 /* only relative events get here */
80 dx = buf[1];
81 dy = -buf[2];
82
83 input_report_rel(atamouse_dev, REL_X, dx);
84 input_report_rel(atamouse_dev, REL_Y, dy);
85
86 input_report_key(atamouse_dev, BTN_LEFT, buttons & 0x1);
87 input_report_key(atamouse_dev, BTN_MIDDLE, buttons & 0x2);
88 input_report_key(atamouse_dev, BTN_RIGHT, buttons & 0x4);
89
90 input_sync(atamouse_dev);
91
92 return;
93 }
94
95 static int atamouse_open(struct input_dev *dev)
96 {
97 #ifdef FIXED_ATARI_JOYSTICK
98 atari_mouse_buttons = 0;
99 #endif
100 ikbd_mouse_y0_top();
101 ikbd_mouse_thresh(mouse_threshold[0], mouse_threshold[1]);
102 ikbd_mouse_rel_pos();
103 atari_input_mouse_interrupt_hook = atamouse_interrupt;
104
105 return 0;
106 }
107
108 static void atamouse_close(struct input_dev *dev)
109 {
110 ikbd_mouse_disable();
111 atari_mouse_interrupt_hook = NULL;
112 }
113
114 static int __init atamouse_init(void)
115 {
116 int error;
117
118 if (!MACH_IS_ATARI || !ATARIHW_PRESENT(ST_MFP))
119 return -ENODEV;
120
121 if (!atari_keyb_init())
122 return -ENODEV;
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
152 static void __exit atamouse_exit(void)
153 {
154 input_unregister_device(atamouse_dev);
155 }
156
157 module_init(atamouse_init);
158 module_exit(atamouse_exit);
159
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