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
|
/*
* 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_select
*
* Modified again by Nathan Laredo to interface with
* 0.96c-pl1 IRQ handling changes (13JUL92)
* didn't bother touching select code.
*
* Modified the select() 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
*
* Minor addition by Cliff Matthews
* added fasync support
*
* Modularised 6-Sep-95 Philip Blundell <pjb27@cam.ac.uk>
*
* Replaced dumb busy loop with udelay() 16 Nov 95
* Nathan Laredo <laredo@gnu.ai.mit.edu>
*
* Track I/O ports with request_region(). 12 Dec 95 Philip Blundell
*
* Converted to use new generic busmouse code. 5 Apr 1998
* Russell King <rmk@arm.uk.linux.org>
*/
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/init.h>
#include <linux/logibusmouse.h>
#include <linux/signal.h>
#include <linux/errno.h>
#include <linux/mm.h>
#include <linux/poll.h>
#include <linux/miscdevice.h>
#include <linux/random.h>
#include <linux/delay.h>
#include <linux/ioport.h>
#include <asm/io.h>
#include <asm/uaccess.h>
#include <asm/system.h>
#include <asm/irq.h>
#include "busmouse.h"
static int msedev;
static int mouse_irq = MOUSE_IRQ;
MODULE_PARM(mouse_irq, "i");
#ifndef MODULE
static int __init bmouse_setup(char *str)
{
int ints[4];
str = get_options(str, ARRAY_SIZE(ints), ints);
if (ints[0] > 0)
mouse_irq=ints[1];
return 1;
}
__setup("logi_busmouse=", bmouse_setup);
#endif /* !MODULE */
static void mouse_interrupt(int irq, void *dev_id, struct pt_regs *regs)
{
char dx, dy;
unsigned char buttons;
outb(MSE_READ_X_LOW, MSE_CONTROL_PORT);
dx = (inb(MSE_DATA_PORT) & 0xf);
outb(MSE_READ_X_HIGH, MSE_CONTROL_PORT);
dx |= (inb(MSE_DATA_PORT) & 0xf) << 4;
outb(MSE_READ_Y_LOW, MSE_CONTROL_PORT );
dy = (inb(MSE_DATA_PORT) & 0xf);
outb(MSE_READ_Y_HIGH, MSE_CONTROL_PORT);
buttons = inb(MSE_DATA_PORT);
dy |= (buttons & 0xf) << 4;
buttons = ((buttons >> 5) & 0x07);
busmouse_add_movementbuttons(msedev, dx, -dy, buttons);
MSE_INT_ON();
}
/*
* close access to the mouse
*/
static int close_mouse(struct inode * inode, struct file * file)
{
MSE_INT_OFF();
free_irq(mouse_irq, NULL);
return 0;
}
/*
* open access to the mouse
*/
static int open_mouse(struct inode * inode, struct file * file)
{
if (request_irq(mouse_irq, mouse_interrupt, 0, "busmouse", NULL))
return -EBUSY;
MSE_INT_ON();
return 0;
}
static struct busmouse busmouse = {
LOGITECH_BUSMOUSE, "busmouse", THIS_MODULE, open_mouse, close_mouse, 7
};
static int __init logi_busmouse_init(void)
{
if (check_region(LOGIBM_BASE, LOGIBM_EXTENT))
return -EIO;
outb(MSE_CONFIG_BYTE, MSE_CONFIG_PORT);
outb(MSE_SIGNATURE_BYTE, MSE_SIGNATURE_PORT);
udelay(100L); /* wait for reply from mouse */
if (inb(MSE_SIGNATURE_PORT) != MSE_SIGNATURE_BYTE)
return -EIO;
outb(MSE_DEFAULT_MODE, MSE_CONFIG_PORT);
MSE_INT_OFF();
request_region(LOGIBM_BASE, LOGIBM_EXTENT, "busmouse");
msedev = register_busmouse(&busmouse);
if (msedev < 0)
printk(KERN_WARNING "Unable to register busmouse driver.\n");
else
printk(KERN_INFO "Logitech busmouse installed.\n");
return msedev < 0 ? msedev : 0;
}
static void __exit logi_busmouse_cleanup (void)
{
unregister_busmouse(msedev);
release_region(LOGIBM_BASE, LOGIBM_EXTENT);
}
module_init(logi_busmouse_init);
module_exit(logi_busmouse_cleanup);
|
