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
25#include <linux/slab.h>
26#include <linux/module.h>
27#include <linux/input.h>
28#include <linux/serio.h>
29
30#define DRIVER_DESC "XT keyboard driver"
31
32MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
33MODULE_DESCRIPTION(DRIVER_DESC);
34MODULE_LICENSE("GPL");
35
36#define XTKBD_EMUL0 0xe0
37#define XTKBD_EMUL1 0xe1
38#define XTKBD_KEY 0x7f
39#define XTKBD_RELEASE 0x80
40
41static unsigned char xtkbd_keycode[256] = {
42 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15,
43 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31,
44 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47,
45 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63,
46 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79,
47 80, 81, 82, 83, 0, 0, 0, 87, 88, 0, 0, 0, 0, 0, 0, 0,
48 0, 0, 0, 0, 0, 87, 88, 0, 0, 0, 0,110,111,103,108,105,
49 106
50};
51
52struct xtkbd {
53 unsigned char keycode[256];
54 struct input_dev *dev;
55 struct serio *serio;
56 char phys[32];
57};
58
59static irqreturn_t xtkbd_interrupt(struct serio *serio,
60 unsigned char data, unsigned int flags)
61{
62 struct xtkbd *xtkbd = serio_get_drvdata(serio);
63
64 switch (data) {
65 case XTKBD_EMUL0:
66 case XTKBD_EMUL1:
67 break;
68 default:
69
70 if (xtkbd->keycode[data & XTKBD_KEY]) {
71 input_report_key(xtkbd->dev, xtkbd->keycode[data & XTKBD_KEY], !(data & XTKBD_RELEASE));
72 input_sync(xtkbd->dev);
73 } else {
74 printk(KERN_WARNING "xtkbd.c: Unknown key (scancode %#x) %s.\n",
75 data & XTKBD_KEY, data & XTKBD_RELEASE ? "released" : "pressed");
76 }
77 }
78 return IRQ_HANDLED;
79}
80
81static int xtkbd_connect(struct serio *serio, struct serio_driver *drv)
82{
83 struct xtkbd *xtkbd;
84 struct input_dev *input_dev;
85 int err = -ENOMEM;
86 int i;
87
88 xtkbd = kmalloc(sizeof(struct xtkbd), GFP_KERNEL);
89 input_dev = input_allocate_device();
90 if (!xtkbd || !input_dev)
91 goto fail1;
92
93 xtkbd->serio = serio;
94 xtkbd->dev = input_dev;
95 snprintf(xtkbd->phys, sizeof(xtkbd->phys), "%s/input0", serio->phys);
96 memcpy(xtkbd->keycode, xtkbd_keycode, sizeof(xtkbd->keycode));
97
98 input_dev->name = "XT Keyboard";
99 input_dev->phys = xtkbd->phys;
100 input_dev->id.bustype = BUS_XTKBD;
101 input_dev->id.vendor = 0x0001;
102 input_dev->id.product = 0x0001;
103 input_dev->id.version = 0x0100;
104 input_dev->dev.parent = &serio->dev;
105
106 input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REP);
107 input_dev->keycode = xtkbd->keycode;
108 input_dev->keycodesize = sizeof(unsigned char);
109 input_dev->keycodemax = ARRAY_SIZE(xtkbd_keycode);
110
111 for (i = 0; i < 255; i++)
112 set_bit(xtkbd->keycode[i], input_dev->keybit);
113 clear_bit(0, input_dev->keybit);
114
115 serio_set_drvdata(serio, xtkbd);
116
117 err = serio_open(serio, drv);
118 if (err)
119 goto fail2;
120
121 err = input_register_device(xtkbd->dev);
122 if (err)
123 goto fail3;
124
125 return 0;
126
127 fail3: serio_close(serio);
128 fail2: serio_set_drvdata(serio, NULL);
129 fail1: input_free_device(input_dev);
130 kfree(xtkbd);
131 return err;
132}
133
134static void xtkbd_disconnect(struct serio *serio)
135{
136 struct xtkbd *xtkbd = serio_get_drvdata(serio);
137
138 serio_close(serio);
139 serio_set_drvdata(serio, NULL);
140 input_unregister_device(xtkbd->dev);
141 kfree(xtkbd);
142}
143
144static const struct serio_device_id xtkbd_serio_ids[] = {
145 {
146 .type = SERIO_XT,
147 .proto = SERIO_ANY,
148 .id = SERIO_ANY,
149 .extra = SERIO_ANY,
150 },
151 { 0 }
152};
153
154MODULE_DEVICE_TABLE(serio, xtkbd_serio_ids);
155
156static struct serio_driver xtkbd_drv = {
157 .driver = {
158 .name = "xtkbd",
159 },
160 .description = DRIVER_DESC,
161 .id_table = xtkbd_serio_ids,
162 .interrupt = xtkbd_interrupt,
163 .connect = xtkbd_connect,
164 .disconnect = xtkbd_disconnect,
165};
166
167module_serio_driver(xtkbd_drv);
168