2 * Copyright (c) 1999-2001 Vojtech Pavlik
4 * Based on the work of:
5 * James Banks Matthew Dillon
6 * David Giller Nathan Laredo
7 * Linus Torvalds Johan Myreen
8 * Cliff Matthews Philip Blundell
13 * Logitech Bus Mouse Driver for Linux
17 * This program is free software; you can redistribute it and/or modify
18 * it under the terms of the GNU General Public License as published by
19 * the Free Software Foundation; either version 2 of the License, or
20 * (at your option) any later version.
22 * This program is distributed in the hope that it will be useful,
23 * but WITHOUT ANY WARRANTY; without even the implied warranty of
24 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
25 * GNU General Public License for more details.
27 * You should have received a copy of the GNU General Public License
28 * along with this program; if not, write to the Free Software
29 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
31 * Should you need to contact me, the author, you can do so either by
32 * e-mail - mail your message to <vojtech@ucw.cz>, or by paper mail:
33 * Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic
36 #include <linux/module.h>
37 #include <linux/delay.h>
38 #include <linux/ioport.h>
39 #include <linux/init.h>
40 #include <linux/input.h>
41 #include <linux/interrupt.h>
46 MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
47 MODULE_DESCRIPTION("Logitech busmouse driver");
48 MODULE_LICENSE("GPL");
50 #define LOGIBM_BASE 0x23c
51 #define LOGIBM_EXTENT 4
53 #define LOGIBM_DATA_PORT LOGIBM_BASE + 0
54 #define LOGIBM_SIGNATURE_PORT LOGIBM_BASE + 1
55 #define LOGIBM_CONTROL_PORT LOGIBM_BASE + 2
56 #define LOGIBM_CONFIG_PORT LOGIBM_BASE + 3
58 #define LOGIBM_ENABLE_IRQ 0x00
59 #define LOGIBM_DISABLE_IRQ 0x10
60 #define LOGIBM_READ_X_LOW 0x80
61 #define LOGIBM_READ_X_HIGH 0xa0
62 #define LOGIBM_READ_Y_LOW 0xc0
63 #define LOGIBM_READ_Y_HIGH 0xe0
65 #define LOGIBM_DEFAULT_MODE 0x90
66 #define LOGIBM_CONFIG_BYTE 0x91
67 #define LOGIBM_SIGNATURE_BYTE 0xa5
71 static int logibm_irq
= LOGIBM_IRQ
;
72 module_param_hw_named(irq
, logibm_irq
, uint
, irq
, 0);
73 MODULE_PARM_DESC(irq
, "IRQ number (5=default)");
75 static struct input_dev
*logibm_dev
;
77 static irqreturn_t
logibm_interrupt(int irq
, void *dev_id
)
80 unsigned char buttons
;
82 outb(LOGIBM_READ_X_LOW
, LOGIBM_CONTROL_PORT
);
83 dx
= (inb(LOGIBM_DATA_PORT
) & 0xf);
84 outb(LOGIBM_READ_X_HIGH
, LOGIBM_CONTROL_PORT
);
85 dx
|= (inb(LOGIBM_DATA_PORT
) & 0xf) << 4;
86 outb(LOGIBM_READ_Y_LOW
, LOGIBM_CONTROL_PORT
);
87 dy
= (inb(LOGIBM_DATA_PORT
) & 0xf);
88 outb(LOGIBM_READ_Y_HIGH
, LOGIBM_CONTROL_PORT
);
89 buttons
= inb(LOGIBM_DATA_PORT
);
90 dy
|= (buttons
& 0xf) << 4;
91 buttons
= ~buttons
>> 5;
93 input_report_rel(logibm_dev
, REL_X
, dx
);
94 input_report_rel(logibm_dev
, REL_Y
, dy
);
95 input_report_key(logibm_dev
, BTN_RIGHT
, buttons
& 1);
96 input_report_key(logibm_dev
, BTN_MIDDLE
, buttons
& 2);
97 input_report_key(logibm_dev
, BTN_LEFT
, buttons
& 4);
98 input_sync(logibm_dev
);
100 outb(LOGIBM_ENABLE_IRQ
, LOGIBM_CONTROL_PORT
);
104 static int logibm_open(struct input_dev
*dev
)
106 if (request_irq(logibm_irq
, logibm_interrupt
, 0, "logibm", NULL
)) {
107 printk(KERN_ERR
"logibm.c: Can't allocate irq %d\n", logibm_irq
);
110 outb(LOGIBM_ENABLE_IRQ
, LOGIBM_CONTROL_PORT
);
114 static void logibm_close(struct input_dev
*dev
)
116 outb(LOGIBM_DISABLE_IRQ
, LOGIBM_CONTROL_PORT
);
117 free_irq(logibm_irq
, NULL
);
120 static int __init
logibm_init(void)
124 if (!request_region(LOGIBM_BASE
, LOGIBM_EXTENT
, "logibm")) {
125 printk(KERN_ERR
"logibm.c: Can't allocate ports at %#x\n", LOGIBM_BASE
);
129 outb(LOGIBM_CONFIG_BYTE
, LOGIBM_CONFIG_PORT
);
130 outb(LOGIBM_SIGNATURE_BYTE
, LOGIBM_SIGNATURE_PORT
);
133 if (inb(LOGIBM_SIGNATURE_PORT
) != LOGIBM_SIGNATURE_BYTE
) {
134 printk(KERN_INFO
"logibm.c: Didn't find Logitech busmouse at %#x\n", LOGIBM_BASE
);
136 goto err_release_region
;
139 outb(LOGIBM_DEFAULT_MODE
, LOGIBM_CONFIG_PORT
);
140 outb(LOGIBM_DISABLE_IRQ
, LOGIBM_CONTROL_PORT
);
142 logibm_dev
= input_allocate_device();
144 printk(KERN_ERR
"logibm.c: Not enough memory for input device\n");
146 goto err_release_region
;
149 logibm_dev
->name
= "Logitech bus mouse";
150 logibm_dev
->phys
= "isa023c/input0";
151 logibm_dev
->id
.bustype
= BUS_ISA
;
152 logibm_dev
->id
.vendor
= 0x0003;
153 logibm_dev
->id
.product
= 0x0001;
154 logibm_dev
->id
.version
= 0x0100;
156 logibm_dev
->evbit
[0] = BIT_MASK(EV_KEY
) | BIT_MASK(EV_REL
);
157 logibm_dev
->keybit
[BIT_WORD(BTN_LEFT
)] = BIT_MASK(BTN_LEFT
) |
158 BIT_MASK(BTN_MIDDLE
) | BIT_MASK(BTN_RIGHT
);
159 logibm_dev
->relbit
[0] = BIT_MASK(REL_X
) | BIT_MASK(REL_Y
);
161 logibm_dev
->open
= logibm_open
;
162 logibm_dev
->close
= logibm_close
;
164 err
= input_register_device(logibm_dev
);
171 input_free_device(logibm_dev
);
173 release_region(LOGIBM_BASE
, LOGIBM_EXTENT
);
178 static void __exit
logibm_exit(void)
180 input_unregister_device(logibm_dev
);
181 release_region(LOGIBM_BASE
, LOGIBM_EXTENT
);
184 module_init(logibm_init
);
185 module_exit(logibm_exit
);