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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * Copyright (c) 2000 Justin Cormack
3 */
4
5/*
6 * Newton 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 <j.cormack@doc.ic.ac.uk>, or by paper mail:
26 * Justin Cormack, 68 Dartmouth Park Road, London NW5 1SN, UK.
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 "Newton keyboard driver"
36
37MODULE_AUTHOR("Justin Cormack <j.cormack@doc.ic.ac.uk>");
38MODULE_DESCRIPTION(DRIVER_DESC);
39MODULE_LICENSE("GPL");
40
41#define NKBD_KEY 0x7f
42#define NKBD_PRESS 0x80
43
44static unsigned char nkbd_keycode[128] = {
45 KEY_A, KEY_S, KEY_D, KEY_F, KEY_H, KEY_G, KEY_Z, KEY_X,
46 KEY_C, KEY_V, 0, KEY_B, KEY_Q, KEY_W, KEY_E, KEY_R,
47 KEY_Y, KEY_T, KEY_1, KEY_2, KEY_3, KEY_4, KEY_6, KEY_5,
48 KEY_EQUAL, KEY_9, KEY_7, KEY_MINUS, KEY_8, KEY_0, KEY_RIGHTBRACE, KEY_O,
49 KEY_U, KEY_LEFTBRACE, KEY_I, KEY_P, KEY_ENTER, KEY_L, KEY_J, KEY_APOSTROPHE,
50 KEY_K, KEY_SEMICOLON, KEY_BACKSLASH, KEY_COMMA, KEY_SLASH, KEY_N, KEY_M, KEY_DOT,
51 KEY_TAB, KEY_SPACE, KEY_GRAVE, KEY_DELETE, 0, 0, 0, KEY_LEFTMETA,
52 KEY_LEFTSHIFT, KEY_CAPSLOCK, KEY_LEFTALT, KEY_LEFTCTRL, KEY_RIGHTSHIFT, 0, 0, 0,
53 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
54 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
55 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
56 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
57 KEY_LEFT, KEY_RIGHT, KEY_DOWN, KEY_UP, 0
58};
59
Linus Torvalds1da177e2005-04-16 15:20:36 -070060struct nkbd {
61 unsigned char keycode[128];
Dmitry Torokhov3c42f0c2005-09-15 02:01:45 -050062 struct input_dev *dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -070063 struct serio *serio;
64 char phys[32];
65};
66
67static irqreturn_t nkbd_interrupt(struct serio *serio,
David Howells7d12e782006-10-05 14:55:46 +010068 unsigned char data, unsigned int flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -070069{
70 struct nkbd *nkbd = serio_get_drvdata(serio);
71
72 /* invalid scan codes are probably the init sequence, so we ignore them */
73 if (nkbd->keycode[data & NKBD_KEY]) {
Dmitry Torokhov3c42f0c2005-09-15 02:01:45 -050074 input_report_key(nkbd->dev, nkbd->keycode[data & NKBD_KEY], data & NKBD_PRESS);
75 input_sync(nkbd->dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -070076 }
77
78 else if (data == 0xe7) /* end of init sequence */
Dmitry Torokhov3c42f0c2005-09-15 02:01:45 -050079 printk(KERN_INFO "input: %s on %s\n", nkbd->dev->name, serio->phys);
Linus Torvalds1da177e2005-04-16 15:20:36 -070080 return IRQ_HANDLED;
81
82}
83
84static int nkbd_connect(struct serio *serio, struct serio_driver *drv)
85{
86 struct nkbd *nkbd;
Dmitry Torokhov3c42f0c2005-09-15 02:01:45 -050087 struct input_dev *input_dev;
88 int err = -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -070089 int i;
Linus Torvalds1da177e2005-04-16 15:20:36 -070090
Dmitry Torokhov3c42f0c2005-09-15 02:01:45 -050091 nkbd = kzalloc(sizeof(struct nkbd), GFP_KERNEL);
92 input_dev = input_allocate_device();
93 if (!nkbd || !input_dev)
94 goto fail;
Linus Torvalds1da177e2005-04-16 15:20:36 -070095
96 nkbd->serio = serio;
Dmitry Torokhov3c42f0c2005-09-15 02:01:45 -050097 nkbd->dev = input_dev;
Dmitry Torokhovea08c6f2006-06-26 01:46:17 -040098 snprintf(nkbd->phys, sizeof(nkbd->phys), "%s/input0", serio->phys);
Dmitry Torokhov3c42f0c2005-09-15 02:01:45 -050099 memcpy(nkbd->keycode, nkbd_keycode, sizeof(nkbd->keycode));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700100
Dmitry Torokhov3c42f0c2005-09-15 02:01:45 -0500101 input_dev->name = "Newton Keyboard";
102 input_dev->phys = nkbd->phys;
103 input_dev->id.bustype = BUS_RS232;
104 input_dev->id.vendor = SERIO_NEWTON;
105 input_dev->id.product = 0x0001;
106 input_dev->id.version = 0x0100;
107 input_dev->cdev.dev = &serio->dev;
108 input_dev->private = nkbd;
109
110 input_dev->evbit[0] = BIT(EV_KEY) | BIT(EV_REP);
111 input_dev->keycode = nkbd->keycode;
112 input_dev->keycodesize = sizeof(unsigned char);
113 input_dev->keycodemax = ARRAY_SIZE(nkbd_keycode);
114 for (i = 0; i < 128; i++)
115 set_bit(nkbd->keycode[i], input_dev->keybit);
116 clear_bit(0, input_dev->keybit);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700117
118 serio_set_drvdata(serio, nkbd);
119
120 err = serio_open(serio, drv);
Dmitry Torokhov3c42f0c2005-09-15 02:01:45 -0500121 if (err)
122 goto fail;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700123
Dmitry Torokhov3c42f0c2005-09-15 02:01:45 -0500124 input_register_device(nkbd->dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700125 return 0;
Dmitry Torokhov3c42f0c2005-09-15 02:01:45 -0500126
127 fail: serio_set_drvdata(serio, NULL);
128 input_free_device(input_dev);
129 kfree(nkbd);
130 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700131}
132
133static void nkbd_disconnect(struct serio *serio)
134{
135 struct nkbd *nkbd = serio_get_drvdata(serio);
136
Linus Torvalds1da177e2005-04-16 15:20:36 -0700137 serio_close(serio);
138 serio_set_drvdata(serio, NULL);
Dmitry Torokhov3c42f0c2005-09-15 02:01:45 -0500139 input_unregister_device(nkbd->dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700140 kfree(nkbd);
141}
142
143static struct serio_device_id nkbd_serio_ids[] = {
144 {
145 .type = SERIO_RS232,
146 .proto = SERIO_NEWTON,
147 .id = SERIO_ANY,
148 .extra = SERIO_ANY,
149 },
150 { 0 }
151};
152
153MODULE_DEVICE_TABLE(serio, nkbd_serio_ids);
154
155static struct serio_driver nkbd_drv = {
156 .driver = {
157 .name = "newtonkbd",
158 },
159 .description = DRIVER_DESC,
160 .id_table = nkbd_serio_ids,
161 .interrupt = nkbd_interrupt,
162 .connect = nkbd_connect,
163 .disconnect = nkbd_disconnect,
164};
165
166static int __init nkbd_init(void)
167{
168 serio_register_driver(&nkbd_drv);
169 return 0;
170}
171
172static void __exit nkbd_exit(void)
173{
174 serio_unregister_driver(&nkbd_drv);
175}
176
177module_init(nkbd_init);
178module_exit(nkbd_exit);