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/init.h>
36 #include <linux/serio.h>
37
38 #define DRIVER_DESC "Stowaway keyboard driver"
39
40 MODULE_AUTHOR("Marek Vasut <marek.vasut@gmail.com>");
41 MODULE_DESCRIPTION(DRIVER_DESC);
42 MODULE_LICENSE("GPL");
43
44 #define SKBD_KEY_MASK 0x7f
45 #define SKBD_RELEASE 0x80
46
47 static unsigned char skbd_keycode[128] = {
48 KEY_1, KEY_2, KEY_3, KEY_Z, KEY_4, KEY_5, KEY_6, KEY_7,
49 0, KEY_Q, KEY_W, KEY_E, KEY_R, KEY_T, KEY_Y, KEY_GRAVE,
50 KEY_X, KEY_A, KEY_S, KEY_D, KEY_F, KEY_G, KEY_H, KEY_SPACE,
51 KEY_CAPSLOCK, KEY_TAB, KEY_LEFTCTRL, 0, 0, 0, 0, 0,
52 0, 0, 0, KEY_LEFTALT, 0, 0, 0, 0,
53 0, 0, 0, 0, KEY_C, KEY_V, KEY_B, KEY_N,
54 KEY_MINUS, KEY_EQUAL, KEY_BACKSPACE, KEY_HOME, KEY_8, KEY_9, KEY_0, KEY_ESC,
55 KEY_LEFTBRACE, KEY_RIGHTBRACE, KEY_BACKSLASH, KEY_END, KEY_U, KEY_I, KEY_O, KEY_P,
56 KEY_APOSTROPHE, KEY_ENTER, KEY_PAGEUP,0, KEY_J, KEY_K, KEY_L, KEY_SEMICOLON,
57 KEY_SLASH, KEY_UP, KEY_PAGEDOWN, 0,KEY_M, KEY_COMMA, KEY_DOT, KEY_INSERT,
58 KEY_DELETE, KEY_LEFT, KEY_DOWN, KEY_RIGHT, 0, 0, 0,
59 KEY_LEFTSHIFT, KEY_RIGHTSHIFT, 0, 0, 0, 0, 0,
60 0, 0, 0, 0, 0, 0, 0, 0,
61 0, 0, 0, 0, 0, 0, 0, 0,
62 0, KEY_F1, KEY_F2, KEY_F3, KEY_F4, KEY_F5, KEY_F6, KEY_F7,
63 KEY_F8, KEY_F9, KEY_F10, KEY_F11, KEY_F12, 0, 0, 0
64 };
65
66 struct skbd {
67 unsigned char keycode[128];
68 struct input_dev *dev;
69 struct serio *serio;
70 char phys[32];
71 };
72
73 static irqreturn_t skbd_interrupt(struct serio *serio, unsigned char data,
74 unsigned int flags)
75 {
76 struct skbd *skbd = serio_get_drvdata(serio);
77 struct input_dev *dev = skbd->dev;
78
79 if (skbd->keycode[data & SKBD_KEY_MASK]) {
80 input_report_key(dev, skbd->keycode[data & SKBD_KEY_MASK],
81 !(data & SKBD_RELEASE));
82 input_sync(dev);
83 }
84
85 return IRQ_HANDLED;
86 }
87
88 static int skbd_connect(struct serio *serio, struct serio_driver *drv)
89 {
90 struct skbd *skbd;
91 struct input_dev *input_dev;
92 int err = -ENOMEM;
93 int i;
94
95 skbd = kzalloc(sizeof(struct skbd), GFP_KERNEL);
96 input_dev = input_allocate_device();
97 if (!skbd || !input_dev)
98 goto fail1;
99
100 skbd->serio = serio;
101 skbd->dev = input_dev;
102 snprintf(skbd->phys, sizeof(skbd->phys), "%s/input0", serio->phys);
103 memcpy(skbd->keycode, skbd_keycode, sizeof(skbd->keycode));
104
105 input_dev->name = "Stowaway Keyboard";
106 input_dev->phys = skbd->phys;
107 input_dev->id.bustype = BUS_RS232;
108 input_dev->id.vendor = SERIO_STOWAWAY;
109 input_dev->id.product = 0x0001;
110 input_dev->id.version = 0x0100;
111 input_dev->dev.parent = &serio->dev;
112
113 input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REP);
114 input_dev->keycode = skbd->keycode;
115 input_dev->keycodesize = sizeof(unsigned char);
116 input_dev->keycodemax = ARRAY_SIZE(skbd_keycode);
117 for (i = 0; i < ARRAY_SIZE(skbd_keycode); i++)
118 set_bit(skbd_keycode[i], input_dev->keybit);
119 clear_bit(0, input_dev->keybit);
120
121 serio_set_drvdata(serio, skbd);
122
123 err = serio_open(serio, drv);
124 if (err)
125 goto fail2;
126
127 err = input_register_device(skbd->dev);
128 if (err)
129 goto fail3;
130
131 return 0;
132
133 fail3: serio_close(serio);
134 fail2: serio_set_drvdata(serio, NULL);
135 fail1: input_free_device(input_dev);
136 kfree(skbd);
137 return err;
138 }
139
140 static void skbd_disconnect(struct serio *serio)
141 {
142 struct skbd *skbd = serio_get_drvdata(serio);
143
144 serio_close(serio);
145 serio_set_drvdata(serio, NULL);
146 input_unregister_device(skbd->dev);
147 kfree(skbd);
148 }
149
150 static struct serio_device_id skbd_serio_ids[] = {
151 {
152 .type = SERIO_RS232,
153 .proto = SERIO_STOWAWAY,
154 .id = SERIO_ANY,
155 .extra = SERIO_ANY,
156 },
157 { 0 }
158 };
159
160 MODULE_DEVICE_TABLE(serio, skbd_serio_ids);
161
162 static struct serio_driver skbd_drv = {
163 .driver = {
164 .name = "stowaway",
165 },
166 .description = DRIVER_DESC,
167 .id_table = skbd_serio_ids,
168 .interrupt = skbd_interrupt,
169 .connect = skbd_connect,
170 .disconnect = skbd_disconnect,
171 };
172
173 static int __init skbd_init(void)
174 {
175 return serio_register_driver(&skbd_drv);
176 }
177
178 static void __exit skbd_exit(void)
179 {
180 serio_unregister_driver(&skbd_drv);
181 }
182
183 module_init(skbd_init);
184 module_exit(skbd_exit);
185
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