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 static char *nkbd_name = "Newton Keyboard";
61
62 struct nkbd {
63 unsigned char keycode[128];
64 struct input_dev dev;
65 struct serio *serio;
66 char phys[32];
67 };
68
69 irqreturn_t nkbd_interrupt(struct serio *serio,
70 unsigned char data, unsigned int flags, struct pt_regs *regs)
71 {
72 struct nkbd *nkbd = serio->private;
73
74 /* invalid scan codes are probably the init sequence, so we ignore them */
75 if (nkbd->keycode[data & NKBD_KEY]) {
76 input_regs(&nkbd->dev, regs);
77 input_report_key(&nkbd->dev, nkbd->keycode[data & NKBD_KEY], data & NKBD_PRESS);
78 input_sync(&nkbd->dev);
79 }
80
81 else if (data == 0xe7) /* end of init sequence */
82 printk(KERN_INFO "input: %s on %s\n", nkbd_name, serio->phys);
83 return IRQ_HANDLED;
84
85 }
86
87 void nkbd_connect(struct serio *serio, struct serio_driver *drv)
88 {
89 struct nkbd *nkbd;
90 int i;
91
92 if (serio->type != (SERIO_RS232 | SERIO_NEWTON))
93 return;
94
95 if (!(nkbd = kmalloc(sizeof(struct nkbd), GFP_KERNEL)))
96 return;
97
98 memset(nkbd, 0, sizeof(struct nkbd));
99
100 nkbd->dev.evbit[0] = BIT(EV_KEY) | BIT(EV_REP);
101
102 nkbd->serio = serio;
103
104 init_input_dev(&nkbd->dev);
105 nkbd->dev.keycode = nkbd->keycode;
106 nkbd->dev.keycodesize = sizeof(unsigned char);
107 nkbd->dev.keycodemax = ARRAY_SIZE(nkbd_keycode);
108 nkbd->dev.private = nkbd;
109 serio->private = nkbd;
110
111 if (serio_open(serio, drv)) {
112 kfree(nkbd);
113 return;
114 }
115
116 memcpy(nkbd->keycode, nkbd_keycode, sizeof(nkbd->keycode));
117 for (i = 0; i < 128; i++)
118 set_bit(nkbd->keycode[i], nkbd->dev.keybit);
119 clear_bit(0, nkbd->dev.keybit);
120
121 sprintf(nkbd->phys, "%s/input0", serio->phys);
122
123 nkbd->dev.name = nkbd_name;
124 nkbd->dev.phys = nkbd->phys;
125 nkbd->dev.id.bustype = BUS_RS232;
126 nkbd->dev.id.vendor = SERIO_NEWTON;
127 nkbd->dev.id.product = 0x0001;
128 nkbd->dev.id.version = 0x0100;
129 nkbd->dev.dev = &serio->dev;
130
131 input_register_device(&nkbd->dev);
132
133 printk(KERN_INFO "input: %s on %s\n", nkbd_name, serio->phys);
134 }
135
136 void nkbd_disconnect(struct serio *serio)
137 {
138 struct nkbd *nkbd = serio->private;
139 input_unregister_device(&nkbd->dev);
140 serio_close(serio);
141 kfree(nkbd);
142 }
143
144 struct serio_driver nkbd_drv = {
145 .driver = {
146 .name = "newtonkbd",
147 },
148 .description = DRIVER_DESC,
149 .interrupt = nkbd_interrupt,
150 .connect = nkbd_connect,
151 .disconnect = nkbd_disconnect,
152 };
153
154 int __init nkbd_init(void)
155 {
156 serio_register_driver(&nkbd_drv);
157 return 0;
158 }
159
160 void __exit nkbd_exit(void)
161 {
162 serio_unregister_driver(&nkbd_drv);
163 }
164
165 module_init(nkbd_init);
166 module_exit(nkbd_exit);
167
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