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
37 MODULE_AUTHOR("Justin Cormack <j.cormack@doc.ic.ac.uk>");
38 MODULE_DESCRIPTION(DRIVER_DESC);
39 MODULE_LICENSE("GPL");
40
41 #define NKBD_KEY 0x7f
42 #define NKBD_PRESS 0x80
43
44 static 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
60 struct nkbd {
61 unsigned char keycode[128];
62 struct input_dev *dev;
63 struct serio *serio;
64 char phys[32];
65 };
66
67 static 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
84 static 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->dev.parent = &serio->dev;
108
109 input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(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
136 static 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
146 static 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
156 MODULE_DEVICE_TABLE(serio, nkbd_serio_ids);
157
158 static 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
169 static int __init nkbd_init(void)
170 {
171 return serio_register_driver(&nkbd_drv);
172 }
173
174 static void __exit nkbd_exit(void)
175 {
176 serio_unregister_driver(&nkbd_drv);
177 }
178
179 module_init(nkbd_init);
180 module_exit(nkbd_exit);
181
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