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
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
|
/*
* Amiga Mouse Driver for Linux 68k by Michael Rausch
* based upon:
*
* Logitech Bus Mouse Driver for Linux
* by James Banks
*
* Mods by Matthew Dillon
* calls verify_area()
* tracks better when X is busy or paging
*
* Heavily modified by David Giller
* changed from queue- to counter- driven
* hacked out a (probably incorrect) mouse_poll
*
* Modified again by Nathan Laredo to interface with
* 0.96c-pl1 IRQ handling changes (13JUL92)
* didn't bother touching poll code.
*
* Modified the poll() code blindly to conform to the VFS
* requirements. 92.07.14 - Linus. Somebody should test it out.
*
* Modified by Johan Myreen to make room for other mice (9AUG92)
* removed assignment chr_fops[10] = &mouse_fops; see mouse.c
* renamed mouse_fops => bus_mouse_fops, made bus_mouse_fops public.
* renamed this file mouse.c => busmouse.c
*
* Modified for use in the 1.3 kernels by Jes Sorensen.
*
* Moved the isr-allocation to the mouse_{open,close} calls, as there
* is no reason to service the mouse in the vertical blank isr if
* the mouse is not in use. Jes Sorensen
*
* Converted to use new generic busmouse code. 5 Apr 1998
* Russell King <rmk@arm.uk.linux.org>
*/
#include <linux/module.h>
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/mm.h>
#include <linux/signal.h>
#include <linux/errno.h>
#include <linux/miscdevice.h>
#include <linux/random.h>
#include <linux/poll.h>
#include <linux/init.h>
#include <linux/ioport.h>
#include <linux/logibusmouse.h>
#include <asm/setup.h>
#include <asm/system.h>
#include <asm/uaccess.h>
#include <asm/irq.h>
#include <asm/amigahw.h>
#include <asm/amigaints.h>
#include "busmouse.h"
#if AMIGA_OLD_INT
#define AMI_MSE_INT_ON() mouseint_allowed = 1
#define AMI_MSE_INT_OFF() mouseint_allowed = 0
static int mouseint_allowed;
#endif
static int msedev;
static void mouse_interrupt(int irq, void *dummy, struct pt_regs *fp)
{
static int lastx=0, lasty=0;
int dx, dy;
int nx, ny;
unsigned char buttons;
unsigned short joy0dat, potgor;
#if AMIGA_OLD_INT
if(!mouseint_allowed)
return;
AMI_MSE_INT_OFF();
#endif
/*
* This routine assumes, just like Kickstart, that the mouse
* has not moved more than 127 ticks since last VBL.
*/
joy0dat = custom.joy0dat;
nx = joy0dat & 0xff;
ny = joy0dat >> 8;
dx = nx - lastx;
if (dx < - 127)
dx = (256 + nx) - lastx;
if (dx > 127)
dx = (nx - 256) - lastx;
dy = ny - lasty;
if (dy < - 127)
dy = (256 + ny) - lasty;
if (dy > 127)
dy = (ny - 256) - lasty;
lastx = nx;
lasty = ny;
#if 0
dx = -lastdx;
dx += (lastdx = joy0dat & 0xff);
if (dx < -127)
dx = -255-dx; /* underrun */
else
if (dx > 127)
dx = 255-dx; /* overflow */
dy = -lastdy;
dy += (lastdy = joy0dat >> 8);
if (dy < -127)
dy = -255-dy;
else
if (dy > 127)
dy = 255-dy;
#endif
potgor = custom.potgor;
buttons = (ciaa.pra & 0x40 ? 4 : 0) | /* left button; note that the bits are low-active, as are the expected results -> double negation */
#if 1
(potgor & 0x0100 ? 2 : 0) | /* middle button; emulation goes here */
#endif
(potgor & 0x0400 ? 1 : 0); /* right button */
busmouse_add_movementbuttons(msedev, dx, -dy, buttons);
#if AMIGA_OLD_INT
AMI_MSE_INT_ON();
#endif
}
/*
* close access to the mouse
*/
static int release_mouse(struct inode * inode, struct file * file)
{
free_irq(IRQ_AMIGA_VERTB, mouse_interrupt);
#if AMIGA_OLD_INT
AMI_MSE_INT_OFF();
#endif
return 0;
}
/*
* open access to the mouse, currently only one open is
* allowed.
*/
static int open_mouse(struct inode * inode, struct file * file)
{
/*
* use VBL to poll mouse deltas
*/
if(request_irq(IRQ_AMIGA_VERTB, mouse_interrupt, 0,
"Amiga mouse", mouse_interrupt)) {
printk(KERN_INFO "Installing Amiga mouse failed.\n");
return -EIO;
}
#if AMIGA_OLD_INT
AMI_MSE_INT_ON();
#endif
return 0;
}
static struct busmouse amigamouse = {
AMIGAMOUSE_MINOR, "amigamouse", THIS_MODULE, open_mouse, release_mouse, 7
};
static int __init amiga_mouse_init(void)
{
if (!MACH_IS_AMIGA || !AMIGAHW_PRESENT(AMI_MOUSE))
return -ENODEV;
if (!request_mem_region(CUSTOM_PHYSADDR+10, 2, "amigamouse [Denise]"))
return -EBUSY;
custom.joytest = 0; /* reset counters */
#if AMIGA_OLD_INT
AMI_MSE_INT_OFF();
#endif
msedev = register_busmouse(&amigamouse);
if (msedev < 0)
printk(KERN_WARNING "Unable to install Amiga mouse driver.\n");
else
printk(KERN_INFO "Amiga mouse installed.\n");
return msedev < 0 ? msedev : 0;
}
static void __exit amiga_mouse_exit(void)
{
unregister_busmouse(msedev);
release_mem_region(CUSTOM_PHYSADDR+10, 2);
}
module_init(amiga_mouse_init);
module_exit(amiga_mouse_exit);
|
