1/*
2 * $Id: xtkbd.c,v 1.1.1.1 2007/08/03 18:52:33 Exp $
3 *
4 *  Copyright (c) 1999-2001 Vojtech Pavlik
5 */
6
7/*
8 * XT keyboard driver for Linux
9 */
10
11/*
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License as published by
14 * the Free Software Foundation; either version 2 of the License, or
15 * (at your option) any later version.
16 *
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
20 * GNU General Public License for more details.
21 *
22 * You should have received a copy of the GNU General Public License
23 * along with this program; if not, write to the Free Software
24 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
25 *
26 * Should you need to contact me, the author, you can do so either by
27 * e-mail - mail your message to <vojtech@ucw.cz>, or by paper mail:
28 * Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic
29 */
30
31#include <linux/slab.h>
32#include <linux/module.h>
33#include <linux/input.h>
34#include <linux/init.h>
35#include <linux/serio.h>
36
37#define DRIVER_DESC	"XT keyboard driver"
38
39MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
40MODULE_DESCRIPTION(DRIVER_DESC);
41MODULE_LICENSE("GPL");
42
43#define XTKBD_EMUL0	0xe0
44#define XTKBD_EMUL1	0xe1
45#define XTKBD_KEY	0x7f
46#define XTKBD_RELEASE	0x80
47
48static unsigned char xtkbd_keycode[256] = {
49	  0,  1,  2,  3,  4,  5,  6,  7,  8,  9, 10, 11, 12, 13, 14, 15,
50	 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31,
51	 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47,
52	 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63,
53	 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79,
54	 80, 81, 82, 83,  0,  0,  0, 87, 88,  0,  0,  0,  0,  0,  0,  0,
55	  0,  0,  0,  0,  0, 87, 88,  0,  0,  0,  0,110,111,103,108,105,
56	106
57};
58
59struct xtkbd {
60	unsigned char keycode[256];
61	struct input_dev *dev;
62	struct serio *serio;
63	char phys[32];
64};
65
66static irqreturn_t xtkbd_interrupt(struct serio *serio,
67	unsigned char data, unsigned int flags)
68{
69	struct xtkbd *xtkbd = serio_get_drvdata(serio);
70
71	switch (data) {
72		case XTKBD_EMUL0:
73		case XTKBD_EMUL1:
74			break;
75		default:
76
77			if (xtkbd->keycode[data & XTKBD_KEY]) {
78				input_report_key(xtkbd->dev, xtkbd->keycode[data & XTKBD_KEY], !(data & XTKBD_RELEASE));
79				input_sync(xtkbd->dev);
80			} else {
81				printk(KERN_WARNING "xtkbd.c: Unknown key (scancode %#x) %s.\n",
82					data & XTKBD_KEY, data & XTKBD_RELEASE ? "released" : "pressed");
83			}
84	}
85	return IRQ_HANDLED;
86}
87
88static int xtkbd_connect(struct serio *serio, struct serio_driver *drv)
89{
90	struct xtkbd *xtkbd;
91	struct input_dev *input_dev;
92	int err = -ENOMEM;
93	int i;
94
95	xtkbd = kmalloc(sizeof(struct xtkbd), GFP_KERNEL);
96	input_dev = input_allocate_device();
97	if (!xtkbd || !input_dev)
98		goto fail1;
99
100	xtkbd->serio = serio;
101	xtkbd->dev = input_dev;
102	snprintf(xtkbd->phys, sizeof(xtkbd->phys), "%s/input0", serio->phys);
103	memcpy(xtkbd->keycode, xtkbd_keycode, sizeof(xtkbd->keycode));
104
105	input_dev->name = "XT Keyboard";
106	input_dev->phys = xtkbd->phys;
107	input_dev->id.bustype = BUS_XTKBD;
108	input_dev->id.vendor  = 0x0001;
109	input_dev->id.product = 0x0001;
110	input_dev->id.version = 0x0100;
111	input_dev->dev.parent = &serio->dev;
112
113	input_dev->evbit[0] = BIT(EV_KEY) | BIT(EV_REP);
114	input_dev->keycode = xtkbd->keycode;
115	input_dev->keycodesize = sizeof(unsigned char);
116	input_dev->keycodemax = ARRAY_SIZE(xtkbd_keycode);
117
118	for (i = 0; i < 255; i++)
119		set_bit(xtkbd->keycode[i], input_dev->keybit);
120	clear_bit(0, input_dev->keybit);
121
122	serio_set_drvdata(serio, xtkbd);
123
124	err = serio_open(serio, drv);
125	if (err)
126		goto fail2;
127
128	err = input_register_device(xtkbd->dev);
129	if (err)
130		goto fail3;
131
132	return 0;
133
134 fail3:	serio_close(serio);
135 fail2:	serio_set_drvdata(serio, NULL);
136 fail1:	input_free_device(input_dev);
137	kfree(xtkbd);
138	return err;
139}
140
141static void xtkbd_disconnect(struct serio *serio)
142{
143	struct xtkbd *xtkbd = serio_get_drvdata(serio);
144
145	serio_close(serio);
146	serio_set_drvdata(serio, NULL);
147	input_unregister_device(xtkbd->dev);
148	kfree(xtkbd);
149}
150
151static struct serio_device_id xtkbd_serio_ids[] = {
152	{
153		.type	= SERIO_XT,
154		.proto	= SERIO_ANY,
155		.id	= SERIO_ANY,
156		.extra	= SERIO_ANY,
157	},
158	{ 0 }
159};
160
161MODULE_DEVICE_TABLE(serio, xtkbd_serio_ids);
162
163static struct serio_driver xtkbd_drv = {
164	.driver		= {
165		.name	= "xtkbd",
166	},
167	.description	= DRIVER_DESC,
168	.id_table	= xtkbd_serio_ids,
169	.interrupt	= xtkbd_interrupt,
170	.connect	= xtkbd_connect,
171	.disconnect	= xtkbd_disconnect,
172};
173
174static int __init xtkbd_init(void)
175{
176	return serio_register_driver(&xtkbd_drv);
177}
178
179static void __exit xtkbd_exit(void)
180{
181	serio_unregister_driver(&xtkbd_drv);
182}
183
184module_init(xtkbd_init);
185module_exit(xtkbd_exit);
186