1/*
2 * $Id: inport.c,v 1.1.1.1 2007/08/03 18:52:33 Exp $
3 *
4 *  Copyright (c) 1999-2001 Vojtech Pavlik
5 *
6 *  Based on the work of:
7 *	Teemu Rantanen		Derrick Cole
8 *	Peter Cervasio		Christoph Niemann
9 *	Philip Blundell		Russell King
10 *	Bob Harris
11 */
12
13/*
14 * Inport (ATI XL and Microsoft) busmouse driver for Linux
15 */
16
17/*
18 * This program is free software; you can redistribute it and/or modify
19 * it under the terms of the GNU General Public License as published by
20 * the Free Software Foundation; either version 2 of the License, or
21 * (at your option) any later version.
22 *
23 * This program is distributed in the hope that it will be useful,
24 * but WITHOUT ANY WARRANTY; without even the implied warranty of
25 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
26 * GNU General Public License for more details.
27 *
28 * You should have received a copy of the GNU General Public License
29 * along with this program; if not, write to the Free Software
30 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
31 *
32 * Should you need to contact me, the author, you can do so either by
33 * e-mail - mail your message to <vojtech@ucw.cz>, or by paper mail:
34 * Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic
35 */
36
37#include <linux/module.h>
38#include <linux/moduleparam.h>
39#include <linux/ioport.h>
40#include <linux/init.h>
41#include <linux/interrupt.h>
42#include <linux/input.h>
43
44#include <asm/io.h>
45#include <asm/irq.h>
46
47MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
48MODULE_DESCRIPTION("Inport (ATI XL and Microsoft) busmouse driver");
49MODULE_LICENSE("GPL");
50
51#define INPORT_BASE		0x23c
52#define INPORT_EXTENT		4
53
54#define INPORT_CONTROL_PORT	INPORT_BASE + 0
55#define INPORT_DATA_PORT	INPORT_BASE + 1
56#define INPORT_SIGNATURE_PORT	INPORT_BASE + 2
57
58#define INPORT_REG_BTNS	0x00
59#define INPORT_REG_X		0x01
60#define INPORT_REG_Y		0x02
61#define INPORT_REG_MODE		0x07
62#define INPORT_RESET		0x80
63
64#ifdef CONFIG_MOUSE_ATIXL
65#define INPORT_NAME		"ATI XL Mouse"
66#define INPORT_VENDOR		0x0002
67#define INPORT_SPEED_30HZ	0x01
68#define INPORT_SPEED_50HZ	0x02
69#define INPORT_SPEED_100HZ	0x03
70#define INPORT_SPEED_200HZ	0x04
71#define INPORT_MODE_BASE	INPORT_SPEED_100HZ
72#define INPORT_MODE_IRQ		0x08
73#else
74#define INPORT_NAME		"Microsoft InPort Mouse"
75#define INPORT_VENDOR		0x0001
76#define INPORT_MODE_BASE	0x10
77#define INPORT_MODE_IRQ		0x01
78#endif
79#define INPORT_MODE_HOLD	0x20
80
81#define INPORT_IRQ		5
82
83static int inport_irq = INPORT_IRQ;
84module_param_named(irq, inport_irq, uint, 0);
85MODULE_PARM_DESC(irq, "IRQ number (5=default)");
86
87static struct input_dev *inport_dev;
88
89static irqreturn_t inport_interrupt(int irq, void *dev_id)
90{
91	unsigned char buttons;
92
93	outb(INPORT_REG_MODE, INPORT_CONTROL_PORT);
94	outb(INPORT_MODE_HOLD | INPORT_MODE_IRQ | INPORT_MODE_BASE, INPORT_DATA_PORT);
95
96	outb(INPORT_REG_X, INPORT_CONTROL_PORT);
97	input_report_rel(inport_dev, REL_X, inb(INPORT_DATA_PORT));
98
99	outb(INPORT_REG_Y, INPORT_CONTROL_PORT);
100	input_report_rel(inport_dev, REL_Y, inb(INPORT_DATA_PORT));
101
102	outb(INPORT_REG_BTNS, INPORT_CONTROL_PORT);
103	buttons = inb(INPORT_DATA_PORT);
104
105	input_report_key(inport_dev, BTN_MIDDLE, buttons & 1);
106	input_report_key(inport_dev, BTN_LEFT,   buttons & 2);
107	input_report_key(inport_dev, BTN_RIGHT,  buttons & 4);
108
109	outb(INPORT_REG_MODE, INPORT_CONTROL_PORT);
110	outb(INPORT_MODE_IRQ | INPORT_MODE_BASE, INPORT_DATA_PORT);
111
112	input_sync(inport_dev);
113	return IRQ_HANDLED;
114}
115
116static int inport_open(struct input_dev *dev)
117{
118	if (request_irq(inport_irq, inport_interrupt, 0, "inport", NULL))
119		return -EBUSY;
120	outb(INPORT_REG_MODE, INPORT_CONTROL_PORT);
121	outb(INPORT_MODE_IRQ | INPORT_MODE_BASE, INPORT_DATA_PORT);
122
123	return 0;
124}
125
126static void inport_close(struct input_dev *dev)
127{
128	outb(INPORT_REG_MODE, INPORT_CONTROL_PORT);
129	outb(INPORT_MODE_BASE, INPORT_DATA_PORT);
130	free_irq(inport_irq, NULL);
131}
132
133static int __init inport_init(void)
134{
135	unsigned char a, b, c;
136	int err;
137
138	if (!request_region(INPORT_BASE, INPORT_EXTENT, "inport")) {
139		printk(KERN_ERR "inport.c: Can't allocate ports at %#x\n", INPORT_BASE);
140		return -EBUSY;
141	}
142
143	a = inb(INPORT_SIGNATURE_PORT);
144	b = inb(INPORT_SIGNATURE_PORT);
145	c = inb(INPORT_SIGNATURE_PORT);
146	if (a == b || a != c) {
147		printk(KERN_ERR "inport.c: Didn't find InPort mouse at %#x\n", INPORT_BASE);
148		err = -ENODEV;
149		goto err_release_region;
150	}
151
152	inport_dev = input_allocate_device();
153	if (!inport_dev) {
154		printk(KERN_ERR "inport.c: Not enough memory for input device\n");
155		err = -ENOMEM;
156		goto err_release_region;
157	}
158
159	inport_dev->name = INPORT_NAME;
160	inport_dev->phys = "isa023c/input0";
161	inport_dev->id.bustype = BUS_ISA;
162	inport_dev->id.vendor  = INPORT_VENDOR;
163	inport_dev->id.product = 0x0001;
164	inport_dev->id.version = 0x0100;
165
166	inport_dev->evbit[0] = BIT(EV_KEY) | BIT(EV_REL);
167	inport_dev->keybit[LONG(BTN_LEFT)] = BIT(BTN_LEFT) | BIT(BTN_MIDDLE) | BIT(BTN_RIGHT);
168	inport_dev->relbit[0] = BIT(REL_X) | BIT(REL_Y);
169
170	inport_dev->open  = inport_open;
171	inport_dev->close = inport_close;
172
173	outb(INPORT_RESET, INPORT_CONTROL_PORT);
174	outb(INPORT_REG_MODE, INPORT_CONTROL_PORT);
175	outb(INPORT_MODE_BASE, INPORT_DATA_PORT);
176
177	err = input_register_device(inport_dev);
178	if (err)
179		goto err_free_dev;
180
181	return 0;
182
183 err_free_dev:
184	input_free_device(inport_dev);
185 err_release_region:
186	release_region(INPORT_BASE, INPORT_EXTENT);
187
188	return err;
189}
190
191static void __exit inport_exit(void)
192{
193	input_unregister_device(inport_dev);
194	release_region(INPORT_BASE, INPORT_EXTENT);
195}
196
197module_init(inport_init);
198module_exit(inport_exit);
199