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