tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * $Id: logibm.c,v 1.11 2001/09/25 10:12:07 vojtech Exp $
3 *
4 * Copyright (c) 1999-2001 Vojtech Pavlik
5 *
6 * Based on the work of:
7 * James Banks Matthew Dillon
8 * David Giller Nathan Laredo
9 * Linus Torvalds Johan Myreen
10 * Cliff Matthews Philip Blundell
11 * Russell King
12 */
13
14/*
15 * Logitech Bus Mouse Driver for Linux
16 */
17
18/*
19 * This program is free software; you can redistribute it and/or modify
20 * it under the terms of the GNU General Public License as published by
21 * the Free Software Foundation; either version 2 of the License, or
22 * (at your option) any later version.
23 *
24 * This program is distributed in the hope that it will be useful,
25 * but WITHOUT ANY WARRANTY; without even the implied warranty of
26 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
27 * GNU General Public License for more details.
28 *
29 * You should have received a copy of the GNU General Public License
30 * along with this program; if not, write to the Free Software
31 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
32 *
33 * Should you need to contact me, the author, you can do so either by
34 * e-mail - mail your message to <vojtech@ucw.cz>, or by paper mail:
35 * Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic
36 */
37
38#include <linux/module.h>
39#include <linux/moduleparam.h>
40#include <linux/delay.h>
41#include <linux/ioport.h>
42#include <linux/init.h>
43#include <linux/input.h>
44#include <linux/interrupt.h>
45
46#include <asm/io.h>
47#include <asm/irq.h>
48
49MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
50MODULE_DESCRIPTION("Logitech busmouse driver");
51MODULE_LICENSE("GPL");
52
53#define LOGIBM_BASE 0x23c
54#define LOGIBM_EXTENT 4
55
56#define LOGIBM_DATA_PORT LOGIBM_BASE + 0
57#define LOGIBM_SIGNATURE_PORT LOGIBM_BASE + 1
58#define LOGIBM_CONTROL_PORT LOGIBM_BASE + 2
59#define LOGIBM_CONFIG_PORT LOGIBM_BASE + 3
60
61#define LOGIBM_ENABLE_IRQ 0x00
62#define LOGIBM_DISABLE_IRQ 0x10
63#define LOGIBM_READ_X_LOW 0x80
64#define LOGIBM_READ_X_HIGH 0xa0
65#define LOGIBM_READ_Y_LOW 0xc0
66#define LOGIBM_READ_Y_HIGH 0xe0
67
68#define LOGIBM_DEFAULT_MODE 0x90
69#define LOGIBM_CONFIG_BYTE 0x91
70#define LOGIBM_SIGNATURE_BYTE 0xa5
71
72#define LOGIBM_IRQ 5
73
74static int logibm_irq = LOGIBM_IRQ;
75module_param_named(irq, logibm_irq, uint, 0);
76MODULE_PARM_DESC(irq, "IRQ number (5=default)");
77
78__obsolete_setup("logibm_irq=");
79
80static irqreturn_t logibm_interrupt(int irq, void *dev_id, struct pt_regs *regs);
81
82static int logibm_open(struct input_dev *dev)
83{
84 if (request_irq(logibm_irq, logibm_interrupt, 0, "logibm", NULL)) {
85 printk(KERN_ERR "logibm.c: Can't allocate irq %d\n", logibm_irq);
86 return -EBUSY;
87 }
88 outb(LOGIBM_ENABLE_IRQ, LOGIBM_CONTROL_PORT);
89 return 0;
90}
91
92static void logibm_close(struct input_dev *dev)
93{
94 outb(LOGIBM_DISABLE_IRQ, LOGIBM_CONTROL_PORT);
95 free_irq(logibm_irq, NULL);
96}
97
98static struct input_dev logibm_dev = {
99 .evbit = { BIT(EV_KEY) | BIT(EV_REL) },
100 .keybit = { [LONG(BTN_LEFT)] = BIT(BTN_LEFT) | BIT(BTN_MIDDLE) | BIT(BTN_RIGHT) },
101 .relbit = { BIT(REL_X) | BIT(REL_Y) },
102 .open = logibm_open,
103 .close = logibm_close,
104 .name = "Logitech bus mouse",
105 .phys = "isa023c/input0",
106 .id = {
107 .bustype = BUS_ISA,
108 .vendor = 0x0003,
109 .product = 0x0001,
110 .version = 0x0100,
111 },
112};
113
114static irqreturn_t logibm_interrupt(int irq, void *dev_id, struct pt_regs *regs)
115{
116 char dx, dy;
117 unsigned char buttons;
118
119 outb(LOGIBM_READ_X_LOW, LOGIBM_CONTROL_PORT);
120 dx = (inb(LOGIBM_DATA_PORT) & 0xf);
121 outb(LOGIBM_READ_X_HIGH, LOGIBM_CONTROL_PORT);
122 dx |= (inb(LOGIBM_DATA_PORT) & 0xf) << 4;
123 outb(LOGIBM_READ_Y_LOW, LOGIBM_CONTROL_PORT);
124 dy = (inb(LOGIBM_DATA_PORT) & 0xf);
125 outb(LOGIBM_READ_Y_HIGH, LOGIBM_CONTROL_PORT);
126 buttons = inb(LOGIBM_DATA_PORT);
127 dy |= (buttons & 0xf) << 4;
128 buttons = ~buttons >> 5;
129
130 input_regs(&logibm_dev, regs);
131 input_report_rel(&logibm_dev, REL_X, dx);
132 input_report_rel(&logibm_dev, REL_Y, dy);
133 input_report_key(&logibm_dev, BTN_RIGHT, buttons & 1);
134 input_report_key(&logibm_dev, BTN_MIDDLE, buttons & 2);
135 input_report_key(&logibm_dev, BTN_LEFT, buttons & 4);
136 input_sync(&logibm_dev);
137
138 outb(LOGIBM_ENABLE_IRQ, LOGIBM_CONTROL_PORT);
139 return IRQ_HANDLED;
140}
141
142static int __init logibm_init(void)
143{
144 if (!request_region(LOGIBM_BASE, LOGIBM_EXTENT, "logibm")) {
145 printk(KERN_ERR "logibm.c: Can't allocate ports at %#x\n", LOGIBM_BASE);
146 return -EBUSY;
147 }
148
149 outb(LOGIBM_CONFIG_BYTE, LOGIBM_CONFIG_PORT);
150 outb(LOGIBM_SIGNATURE_BYTE, LOGIBM_SIGNATURE_PORT);
151 udelay(100);
152
153 if (inb(LOGIBM_SIGNATURE_PORT) != LOGIBM_SIGNATURE_BYTE) {
154 release_region(LOGIBM_BASE, LOGIBM_EXTENT);
155 printk(KERN_ERR "logibm.c: Didn't find Logitech busmouse at %#x\n", LOGIBM_BASE);
156 return -ENODEV;
157 }
158
159 outb(LOGIBM_DEFAULT_MODE, LOGIBM_CONFIG_PORT);
160 outb(LOGIBM_DISABLE_IRQ, LOGIBM_CONTROL_PORT);
161
162 input_register_device(&logibm_dev);
163
164 printk(KERN_INFO "input: Logitech bus mouse at %#x irq %d\n", LOGIBM_BASE, logibm_irq);
165
166 return 0;
167}
168
169static void __exit logibm_exit(void)
170{
171 input_unregister_device(&logibm_dev);
172 release_region(LOGIBM_BASE, LOGIBM_EXTENT);
173}
174
175module_init(logibm_init);
176module_exit(logibm_exit);