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/init.h>
33 #include <linux/serio.h>
34
35 #define DRIVER_DESC "XT keyboard driver"
36
37 MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
38 MODULE_DESCRIPTION(DRIVER_DESC);
39 MODULE_LICENSE("GPL");
40
41 #define XTKBD_EMUL0 0xe0
42 #define XTKBD_EMUL1 0xe1
43 #define XTKBD_KEY 0x7f
44 #define XTKBD_RELEASE 0x80
45
46 static unsigned char xtkbd_keycode[256] = {
47 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15,
48 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31,
49 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47,
50 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63,
51 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79,
52 80, 81, 82, 83, 0, 0, 0, 87, 88, 0, 0, 0, 0, 0, 0, 0,
53 0, 0, 0, 0, 0, 87, 88, 0, 0, 0, 0,110,111,103,108,105,
54 106
55 };
56
57 struct xtkbd {
58 unsigned char keycode[256];
59 struct input_dev *dev;
60 struct serio *serio;
61 char phys[32];
62 };
63
xtkbd_interrupt(struct serio * serio,unsigned char data,unsigned int flags)64 static irqreturn_t xtkbd_interrupt(struct serio *serio,
65 unsigned char data, unsigned int flags)
66 {
67 struct xtkbd *xtkbd = serio_get_drvdata(serio);
68
69 switch (data) {
70 case XTKBD_EMUL0:
71 case XTKBD_EMUL1:
72 break;
73 default:
74
75 if (xtkbd->keycode[data & XTKBD_KEY]) {
76 input_report_key(xtkbd->dev, xtkbd->keycode[data & XTKBD_KEY], !(data & XTKBD_RELEASE));
77 input_sync(xtkbd->dev);
78 } else {
79 printk(KERN_WARNING "xtkbd.c: Unknown key (scancode %#x) %s.\n",
80 data & XTKBD_KEY, data & XTKBD_RELEASE ? "released" : "pressed");
81 }
82 }
83 return IRQ_HANDLED;
84 }
85
xtkbd_connect(struct serio * serio,struct serio_driver * drv)86 static int xtkbd_connect(struct serio *serio, struct serio_driver *drv)
87 {
88 struct xtkbd *xtkbd;
89 struct input_dev *input_dev;
90 int err = -ENOMEM;
91 int i;
92
93 xtkbd = kmalloc(sizeof(struct xtkbd), GFP_KERNEL);
94 input_dev = input_allocate_device();
95 if (!xtkbd || !input_dev)
96 goto fail1;
97
98 xtkbd->serio = serio;
99 xtkbd->dev = input_dev;
100 snprintf(xtkbd->phys, sizeof(xtkbd->phys), "%s/input0", serio->phys);
101 memcpy(xtkbd->keycode, xtkbd_keycode, sizeof(xtkbd->keycode));
102
103 input_dev->name = "XT Keyboard";
104 input_dev->phys = xtkbd->phys;
105 input_dev->id.bustype = BUS_XTKBD;
106 input_dev->id.vendor = 0x0001;
107 input_dev->id.product = 0x0001;
108 input_dev->id.version = 0x0100;
109 input_dev->dev.parent = &serio->dev;
110
111 input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REP);
112 input_dev->keycode = xtkbd->keycode;
113 input_dev->keycodesize = sizeof(unsigned char);
114 input_dev->keycodemax = ARRAY_SIZE(xtkbd_keycode);
115
116 for (i = 0; i < 255; i++)
117 set_bit(xtkbd->keycode[i], input_dev->keybit);
118 clear_bit(0, input_dev->keybit);
119
120 serio_set_drvdata(serio, xtkbd);
121
122 err = serio_open(serio, drv);
123 if (err)
124 goto fail2;
125
126 err = input_register_device(xtkbd->dev);
127 if (err)
128 goto fail3;
129
130 return 0;
131
132 fail3: serio_close(serio);
133 fail2: serio_set_drvdata(serio, NULL);
134 fail1: input_free_device(input_dev);
135 kfree(xtkbd);
136 return err;
137 }
138
xtkbd_disconnect(struct serio * serio)139 static void xtkbd_disconnect(struct serio *serio)
140 {
141 struct xtkbd *xtkbd = serio_get_drvdata(serio);
142
143 serio_close(serio);
144 serio_set_drvdata(serio, NULL);
145 input_unregister_device(xtkbd->dev);
146 kfree(xtkbd);
147 }
148
149 static struct serio_device_id xtkbd_serio_ids[] = {
150 {
151 .type = SERIO_XT,
152 .proto = SERIO_ANY,
153 .id = SERIO_ANY,
154 .extra = SERIO_ANY,
155 },
156 { 0 }
157 };
158
159 MODULE_DEVICE_TABLE(serio, xtkbd_serio_ids);
160
161 static struct serio_driver xtkbd_drv = {
162 .driver = {
163 .name = "xtkbd",
164 },
165 .description = DRIVER_DESC,
166 .id_table = xtkbd_serio_ids,
167 .interrupt = xtkbd_interrupt,
168 .connect = xtkbd_connect,
169 .disconnect = xtkbd_disconnect,
170 };
171
xtkbd_init(void)172 static int __init xtkbd_init(void)
173 {
174 return serio_register_driver(&xtkbd_drv);
175 }
176
xtkbd_exit(void)177 static void __exit xtkbd_exit(void)
178 {
179 serio_unregister_driver(&xtkbd_drv);
180 }
181
182 module_init(xtkbd_init);
183 module_exit(xtkbd_exit);
184