newtonkbd.c revision b356872fa48a3f6b6f187444b0ea55e6e21c3575 
1/*
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
60struct nkbd {
61	unsigned char keycode[128];
62	struct input_dev *dev;
63	struct serio *serio;
64	char phys[32];
65};
66
67static irqreturn_t nkbd_interrupt(struct serio *serio,
68		unsigned char data, unsigned int flags)
69{
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]) {
74		input_report_key(nkbd->dev, nkbd->keycode[data & NKBD_KEY], data & NKBD_PRESS);
75		input_sync(nkbd->dev);
76	}
77
78	else if (data == 0xe7) /* end of init sequence */
79		printk(KERN_INFO "input: %s on %s\n", nkbd->dev->name, serio->phys);
80	return IRQ_HANDLED;
81
82}
83
84static int nkbd_connect(struct serio *serio, struct serio_driver *drv)
85{
86	struct nkbd *nkbd;
87	struct input_dev *input_dev;
88	int err = -ENOMEM;
89	int i;
90
91	nkbd = kzalloc(sizeof(struct nkbd), GFP_KERNEL);
92	input_dev = input_allocate_device();
93	if (!nkbd || !input_dev)
94		goto fail1;
95
96	nkbd->serio = serio;
97	nkbd->dev = input_dev;
98	snprintf(nkbd->phys, sizeof(nkbd->phys), "%s/input0", serio->phys);
99	memcpy(nkbd->keycode, nkbd_keycode, sizeof(nkbd->keycode));
100
101	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
109	input_dev->evbit[0] = BIT(EV_KEY) | BIT(EV_REP);
110	input_dev->keycode = nkbd->keycode;
111	input_dev->keycodesize = sizeof(unsigned char);
112	input_dev->keycodemax = ARRAY_SIZE(nkbd_keycode);
113	for (i = 0; i < 128; i++)
114		set_bit(nkbd->keycode[i], input_dev->keybit);
115	clear_bit(0, input_dev->keybit);
116
117	serio_set_drvdata(serio, nkbd);
118
119	err = serio_open(serio, drv);
120	if (err)
121		goto fail2;
122
123	err = input_register_device(nkbd->dev);
124	if (err)
125		goto fail3;
126
127	return 0;
128
129 fail3:	serio_close(serio);
130 fail2:	serio_set_drvdata(serio, NULL);
131 fail1:	input_free_device(input_dev);
132	kfree(nkbd);
133	return err;
134}
135
136static void nkbd_disconnect(struct serio *serio)
137{
138	struct nkbd *nkbd = serio_get_drvdata(serio);
139
140	serio_close(serio);
141	serio_set_drvdata(serio, NULL);
142	input_unregister_device(nkbd->dev);
143	kfree(nkbd);
144}
145
146static struct serio_device_id nkbd_serio_ids[] = {
147	{
148		.type	= SERIO_RS232,
149		.proto	= SERIO_NEWTON,
150		.id	= SERIO_ANY,
151		.extra	= SERIO_ANY,
152	},
153	{ 0 }
154};
155
156MODULE_DEVICE_TABLE(serio, nkbd_serio_ids);
157
158static struct serio_driver nkbd_drv = {
159	.driver		= {
160		.name	= "newtonkbd",
161	},
162	.description	= DRIVER_DESC,
163	.id_table	= nkbd_serio_ids,
164	.interrupt	= nkbd_interrupt,
165	.connect	= nkbd_connect,
166	.disconnect	= nkbd_disconnect,
167};
168
169static int __init nkbd_init(void)
170{
171	return serio_register_driver(&nkbd_drv);
172}
173
174static void __exit nkbd_exit(void)
175{
176	serio_unregister_driver(&nkbd_drv);
177}
178
179module_init(nkbd_init);
180module_exit(nkbd_exit);
181