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