1/*
2 * Stowaway keyboard driver for Linux
3 */
4
5/*
6 *  Copyright (c) 2006 Marek Vasut
7 *
8 *  Based on Newton keyboard driver for Linux
9 *  by Justin Cormack
10 */
11
12/*
13 * This program is free software; you can redistribute it and/or modify
14 * it under the terms of the GNU General Public License as published by
15 * the Free Software Foundation; either version 2 of the License, or
16 * (at your option) any later version.
17 *
18 * This program is distributed in the hope that it will be useful,
19 * but WITHOUT ANY WARRANTY; without even the implied warranty of
20 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
21 * GNU General Public License for more details.
22 *
23 * You should have received a copy of the GNU General Public License
24 * along with this program; if not, write to the Free Software
25 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
26 *
27 * Should you need to contact me, the author, you can do so either by
28 * e-mail - mail your message to <marek.vasut@gmail.com>, or by paper mail:
29 * Marek Vasut, Liskovecka 559, Frydek-Mistek, 738 01 Czech Republic
30 */
31
32#include <linux/slab.h>
33#include <linux/module.h>
34#include <linux/input.h>
35#include <linux/serio.h>
36
37#define DRIVER_DESC	"Stowaway keyboard driver"
38
39MODULE_AUTHOR("Marek Vasut <marek.vasut@gmail.com>");
40MODULE_DESCRIPTION(DRIVER_DESC);
41MODULE_LICENSE("GPL");
42
43#define SKBD_KEY_MASK	0x7f
44#define SKBD_RELEASE	0x80
45
46static unsigned char skbd_keycode[128] = {
47	KEY_1, KEY_2, KEY_3, KEY_Z, KEY_4, KEY_5, KEY_6, KEY_7,
48	0, KEY_Q, KEY_W, KEY_E, KEY_R, KEY_T, KEY_Y, KEY_GRAVE,
49	KEY_X, KEY_A, KEY_S, KEY_D, KEY_F, KEY_G, KEY_H, KEY_SPACE,
50	KEY_CAPSLOCK, KEY_TAB, KEY_LEFTCTRL, 0, 0, 0, 0, 0,
51	0, 0, 0, KEY_LEFTALT, 0, 0, 0, 0,
52	0, 0, 0, 0, KEY_C, KEY_V, KEY_B, KEY_N,
53	KEY_MINUS, KEY_EQUAL, KEY_BACKSPACE, KEY_HOME, KEY_8, KEY_9, KEY_0, KEY_ESC,
54	KEY_LEFTBRACE, KEY_RIGHTBRACE, KEY_BACKSLASH, KEY_END, KEY_U, KEY_I, KEY_O, KEY_P,
55	KEY_APOSTROPHE, KEY_ENTER, KEY_PAGEUP,0, KEY_J, KEY_K, KEY_L, KEY_SEMICOLON,
56	KEY_SLASH, KEY_UP, KEY_PAGEDOWN, 0,KEY_M, KEY_COMMA, KEY_DOT, KEY_INSERT,
57	KEY_DELETE, KEY_LEFT, KEY_DOWN, KEY_RIGHT,  0, 0, 0,
58	KEY_LEFTSHIFT, KEY_RIGHTSHIFT, 0, 0, 0, 0, 0,
59	0, 0, 0, 0, 0, 0, 0, 0,
60	0, 0, 0, 0, 0, 0, 0, 0,
61	0, KEY_F1, KEY_F2, KEY_F3, KEY_F4, KEY_F5, KEY_F6, KEY_F7,
62	KEY_F8, KEY_F9, KEY_F10, KEY_F11, KEY_F12, 0, 0, 0
63};
64
65struct skbd {
66	unsigned char keycode[128];
67	struct input_dev *dev;
68	struct serio *serio;
69	char phys[32];
70};
71
72static irqreturn_t skbd_interrupt(struct serio *serio, unsigned char data,
73				  unsigned int flags)
74{
75	struct skbd *skbd = serio_get_drvdata(serio);
76	struct input_dev *dev = skbd->dev;
77
78	if (skbd->keycode[data & SKBD_KEY_MASK]) {
79		input_report_key(dev, skbd->keycode[data & SKBD_KEY_MASK],
80				 !(data & SKBD_RELEASE));
81		input_sync(dev);
82	}
83
84	return IRQ_HANDLED;
85}
86
87static int skbd_connect(struct serio *serio, struct serio_driver *drv)
88{
89	struct skbd *skbd;
90	struct input_dev *input_dev;
91	int err = -ENOMEM;
92	int i;
93
94	skbd = kzalloc(sizeof(struct skbd), GFP_KERNEL);
95	input_dev = input_allocate_device();
96	if (!skbd || !input_dev)
97		goto fail1;
98
99	skbd->serio = serio;
100	skbd->dev = input_dev;
101	snprintf(skbd->phys, sizeof(skbd->phys), "%s/input0", serio->phys);
102	memcpy(skbd->keycode, skbd_keycode, sizeof(skbd->keycode));
103
104	input_dev->name = "Stowaway Keyboard";
105	input_dev->phys = skbd->phys;
106	input_dev->id.bustype = BUS_RS232;
107	input_dev->id.vendor = SERIO_STOWAWAY;
108	input_dev->id.product = 0x0001;
109	input_dev->id.version = 0x0100;
110	input_dev->dev.parent = &serio->dev;
111
112	input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REP);
113	input_dev->keycode = skbd->keycode;
114	input_dev->keycodesize = sizeof(unsigned char);
115	input_dev->keycodemax = ARRAY_SIZE(skbd_keycode);
116	for (i = 0; i < ARRAY_SIZE(skbd_keycode); i++)
117		set_bit(skbd_keycode[i], input_dev->keybit);
118	clear_bit(0, input_dev->keybit);
119
120	serio_set_drvdata(serio, skbd);
121
122	err = serio_open(serio, drv);
123	if (err)
124		goto fail2;
125
126	err = input_register_device(skbd->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(skbd);
136	return err;
137}
138
139static void skbd_disconnect(struct serio *serio)
140{
141	struct skbd *skbd = serio_get_drvdata(serio);
142
143	serio_close(serio);
144	serio_set_drvdata(serio, NULL);
145	input_unregister_device(skbd->dev);
146	kfree(skbd);
147}
148
149static struct serio_device_id skbd_serio_ids[] = {
150	{
151		.type	= SERIO_RS232,
152		.proto	= SERIO_STOWAWAY,
153		.id	= SERIO_ANY,
154		.extra	= SERIO_ANY,
155	},
156	{ 0 }
157};
158
159MODULE_DEVICE_TABLE(serio, skbd_serio_ids);
160
161static struct serio_driver skbd_drv = {
162	.driver		= {
163		.name	= "stowaway",
164	},
165	.description	= DRIVER_DESC,
166	.id_table	= skbd_serio_ids,
167	.interrupt	= skbd_interrupt,
168	.connect	= skbd_connect,
169	.disconnect	= skbd_disconnect,
170};
171
172module_serio_driver(skbd_drv);
173