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
28#include <linux/slab.h>
29#include <linux/module.h>
30#include <linux/input.h>
31#include <linux/serio.h>
32
33#define DRIVER_DESC "Stowaway keyboard driver"
34
35MODULE_AUTHOR("Marek Vasut <marek.vasut@gmail.com>");
36MODULE_DESCRIPTION(DRIVER_DESC);
37MODULE_LICENSE("GPL");
38
39#define SKBD_KEY_MASK 0x7f
40#define SKBD_RELEASE 0x80
41
42static unsigned char skbd_keycode[128] = {
43 KEY_1, KEY_2, KEY_3, KEY_Z, KEY_4, KEY_5, KEY_6, KEY_7,
44 0, KEY_Q, KEY_W, KEY_E, KEY_R, KEY_T, KEY_Y, KEY_GRAVE,
45 KEY_X, KEY_A, KEY_S, KEY_D, KEY_F, KEY_G, KEY_H, KEY_SPACE,
46 KEY_CAPSLOCK, KEY_TAB, KEY_LEFTCTRL, 0, 0, 0, 0, 0,
47 0, 0, 0, KEY_LEFTALT, 0, 0, 0, 0,
48 0, 0, 0, 0, KEY_C, KEY_V, KEY_B, KEY_N,
49 KEY_MINUS, KEY_EQUAL, KEY_BACKSPACE, KEY_HOME, KEY_8, KEY_9, KEY_0, KEY_ESC,
50 KEY_LEFTBRACE, KEY_RIGHTBRACE, KEY_BACKSLASH, KEY_END, KEY_U, KEY_I, KEY_O, KEY_P,
51 KEY_APOSTROPHE, KEY_ENTER, KEY_PAGEUP,0, KEY_J, KEY_K, KEY_L, KEY_SEMICOLON,
52 KEY_SLASH, KEY_UP, KEY_PAGEDOWN, 0,KEY_M, KEY_COMMA, KEY_DOT, KEY_INSERT,
53 KEY_DELETE, KEY_LEFT, KEY_DOWN, KEY_RIGHT, 0, 0, 0,
54 KEY_LEFTSHIFT, KEY_RIGHTSHIFT, 0, 0, 0, 0, 0,
55 0, 0, 0, 0, 0, 0, 0, 0,
56 0, 0, 0, 0, 0, 0, 0, 0,
57 0, KEY_F1, KEY_F2, KEY_F3, KEY_F4, KEY_F5, KEY_F6, KEY_F7,
58 KEY_F8, KEY_F9, KEY_F10, KEY_F11, KEY_F12, 0, 0, 0
59};
60
61struct skbd {
62 unsigned char keycode[128];
63 struct input_dev *dev;
64 struct serio *serio;
65 char phys[32];
66};
67
68static irqreturn_t skbd_interrupt(struct serio *serio, unsigned char data,
69 unsigned int flags)
70{
71 struct skbd *skbd = serio_get_drvdata(serio);
72 struct input_dev *dev = skbd->dev;
73
74 if (skbd->keycode[data & SKBD_KEY_MASK]) {
75 input_report_key(dev, skbd->keycode[data & SKBD_KEY_MASK],
76 !(data & SKBD_RELEASE));
77 input_sync(dev);
78 }
79
80 return IRQ_HANDLED;
81}
82
83static int skbd_connect(struct serio *serio, struct serio_driver *drv)
84{
85 struct skbd *skbd;
86 struct input_dev *input_dev;
87 int err = -ENOMEM;
88 int i;
89
90 skbd = kzalloc(sizeof(struct skbd), GFP_KERNEL);
91 input_dev = input_allocate_device();
92 if (!skbd || !input_dev)
93 goto fail1;
94
95 skbd->serio = serio;
96 skbd->dev = input_dev;
97 snprintf(skbd->phys, sizeof(skbd->phys), "%s/input0", serio->phys);
98 memcpy(skbd->keycode, skbd_keycode, sizeof(skbd->keycode));
99
100 input_dev->name = "Stowaway Keyboard";
101 input_dev->phys = skbd->phys;
102 input_dev->id.bustype = BUS_RS232;
103 input_dev->id.vendor = SERIO_STOWAWAY;
104 input_dev->id.product = 0x0001;
105 input_dev->id.version = 0x0100;
106 input_dev->dev.parent = &serio->dev;
107
108 input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REP);
109 input_dev->keycode = skbd->keycode;
110 input_dev->keycodesize = sizeof(unsigned char);
111 input_dev->keycodemax = ARRAY_SIZE(skbd_keycode);
112 for (i = 0; i < ARRAY_SIZE(skbd_keycode); i++)
113 set_bit(skbd_keycode[i], input_dev->keybit);
114 clear_bit(0, input_dev->keybit);
115
116 serio_set_drvdata(serio, skbd);
117
118 err = serio_open(serio, drv);
119 if (err)
120 goto fail2;
121
122 err = input_register_device(skbd->dev);
123 if (err)
124 goto fail3;
125
126 return 0;
127
128 fail3: serio_close(serio);
129 fail2: serio_set_drvdata(serio, NULL);
130 fail1: input_free_device(input_dev);
131 kfree(skbd);
132 return err;
133}
134
135static void skbd_disconnect(struct serio *serio)
136{
137 struct skbd *skbd = serio_get_drvdata(serio);
138
139 serio_close(serio);
140 serio_set_drvdata(serio, NULL);
141 input_unregister_device(skbd->dev);
142 kfree(skbd);
143}
144
145static const struct serio_device_id skbd_serio_ids[] = {
146 {
147 .type = SERIO_RS232,
148 .proto = SERIO_STOWAWAY,
149 .id = SERIO_ANY,
150 .extra = SERIO_ANY,
151 },
152 { 0 }
153};
154
155MODULE_DEVICE_TABLE(serio, skbd_serio_ids);
156
157static struct serio_driver skbd_drv = {
158 .driver = {
159 .name = "stowaway",
160 },
161 .description = DRIVER_DESC,
162 .id_table = skbd_serio_ids,
163 .interrupt = skbd_interrupt,
164 .connect = skbd_connect,
165 .disconnect = skbd_disconnect,
166};
167
168module_serio_driver(skbd_drv);
169