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
55 MODULE_AUTHOR("Michael Schmitz <schmitz@biophys.uni-duesseldorf.de>");
56 MODULE_DESCRIPTION("Atari mouse driver");
57 MODULE_LICENSE("GPL");
58
59 static int mouse_threshold[2] = {2, 2};
60 module_param_array(mouse_threshold, int, NULL, 0);
61
62 #ifdef FIXED_ATARI_JOYSTICK
63 extern int atari_mouse_buttons;
64 #endif
65
66 static struct input_dev *atamouse_dev;
67
atamouse_interrupt(char * buf)68 static 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
atamouse_open(struct input_dev * dev)94 static 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
atamouse_close(struct input_dev * dev)107 static void atamouse_close(struct input_dev *dev)
108 {
109 ikbd_mouse_disable();
110 atari_input_mouse_interrupt_hook = NULL;
111 }
112
atamouse_init(void)113 static 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
atamouse_exit(void)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