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
25#include <linux/slab.h>
26#include <linux/module.h>
27#include <linux/input.h>
28#include <linux/serio.h>
29
30#define DRIVER_DESC "Newton keyboard driver"
31
32MODULE_AUTHOR("Justin Cormack <j.cormack@doc.ic.ac.uk>");
33MODULE_DESCRIPTION(DRIVER_DESC);
34MODULE_LICENSE("GPL");
35
36#define NKBD_KEY 0x7f
37#define NKBD_PRESS 0x80
38
39static unsigned char nkbd_keycode[128] = {
40 KEY_A, KEY_S, KEY_D, KEY_F, KEY_H, KEY_G, KEY_Z, KEY_X,
41 KEY_C, KEY_V, 0, KEY_B, KEY_Q, KEY_W, KEY_E, KEY_R,
42 KEY_Y, KEY_T, KEY_1, KEY_2, KEY_3, KEY_4, KEY_6, KEY_5,
43 KEY_EQUAL, KEY_9, KEY_7, KEY_MINUS, KEY_8, KEY_0, KEY_RIGHTBRACE, KEY_O,
44 KEY_U, KEY_LEFTBRACE, KEY_I, KEY_P, KEY_ENTER, KEY_L, KEY_J, KEY_APOSTROPHE,
45 KEY_K, KEY_SEMICOLON, KEY_BACKSLASH, KEY_COMMA, KEY_SLASH, KEY_N, KEY_M, KEY_DOT,
46 KEY_TAB, KEY_SPACE, KEY_GRAVE, KEY_DELETE, 0, 0, 0, KEY_LEFTMETA,
47 KEY_LEFTSHIFT, KEY_CAPSLOCK, KEY_LEFTALT, KEY_LEFTCTRL, KEY_RIGHTSHIFT, 0, 0, 0,
48 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
49 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
50 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
51 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
52 KEY_LEFT, KEY_RIGHT, KEY_DOWN, KEY_UP, 0
53};
54
55struct nkbd {
56 unsigned char keycode[128];
57 struct input_dev *dev;
58 struct serio *serio;
59 char phys[32];
60};
61
62static irqreturn_t nkbd_interrupt(struct serio *serio,
63 unsigned char data, unsigned int flags)
64{
65 struct nkbd *nkbd = serio_get_drvdata(serio);
66
67 /* invalid scan codes are probably the init sequence, so we ignore them */
68 if (nkbd->keycode[data & NKBD_KEY]) {
69 input_report_key(nkbd->dev, nkbd->keycode[data & NKBD_KEY], data & NKBD_PRESS);
70 input_sync(nkbd->dev);
71 }
72
73 else if (data == 0xe7) /* end of init sequence */
74 printk(KERN_INFO "input: %s on %s\n", nkbd->dev->name, serio->phys);
75 return IRQ_HANDLED;
76
77}
78
79static int nkbd_connect(struct serio *serio, struct serio_driver *drv)
80{
81 struct nkbd *nkbd;
82 struct input_dev *input_dev;
83 int err = -ENOMEM;
84 int i;
85
86 nkbd = kzalloc(sizeof(struct nkbd), GFP_KERNEL);
87 input_dev = input_allocate_device();
88 if (!nkbd || !input_dev)
89 goto fail1;
90
91 nkbd->serio = serio;
92 nkbd->dev = input_dev;
93 snprintf(nkbd->phys, sizeof(nkbd->phys), "%s/input0", serio->phys);
94 memcpy(nkbd->keycode, nkbd_keycode, sizeof(nkbd->keycode));
95
96 input_dev->name = "Newton Keyboard";
97 input_dev->phys = nkbd->phys;
98 input_dev->id.bustype = BUS_RS232;
99 input_dev->id.vendor = SERIO_NEWTON;
100 input_dev->id.product = 0x0001;
101 input_dev->id.version = 0x0100;
102 input_dev->dev.parent = &serio->dev;
103
104 input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REP);
105 input_dev->keycode = nkbd->keycode;
106 input_dev->keycodesize = sizeof(unsigned char);
107 input_dev->keycodemax = ARRAY_SIZE(nkbd_keycode);
108 for (i = 0; i < 128; i++)
109 set_bit(nkbd->keycode[i], input_dev->keybit);
110 clear_bit(0, input_dev->keybit);
111
112 serio_set_drvdata(serio, nkbd);
113
114 err = serio_open(serio, drv);
115 if (err)
116 goto fail2;
117
118 err = input_register_device(nkbd->dev);
119 if (err)
120 goto fail3;
121
122 return 0;
123
124 fail3: serio_close(serio);
125 fail2: serio_set_drvdata(serio, NULL);
126 fail1: input_free_device(input_dev);
127 kfree(nkbd);
128 return err;
129}
130
131static void nkbd_disconnect(struct serio *serio)
132{
133 struct nkbd *nkbd = serio_get_drvdata(serio);
134
135 serio_close(serio);
136 serio_set_drvdata(serio, NULL);
137 input_unregister_device(nkbd->dev);
138 kfree(nkbd);
139}
140
141static const struct serio_device_id nkbd_serio_ids[] = {
142 {
143 .type = SERIO_RS232,
144 .proto = SERIO_NEWTON,
145 .id = SERIO_ANY,
146 .extra = SERIO_ANY,
147 },
148 { 0 }
149};
150
151MODULE_DEVICE_TABLE(serio, nkbd_serio_ids);
152
153static struct serio_driver nkbd_drv = {
154 .driver = {
155 .name = "newtonkbd",
156 },
157 .description = DRIVER_DESC,
158 .id_table = nkbd_serio_ids,
159 .interrupt = nkbd_interrupt,
160 .connect = nkbd_connect,
161 .disconnect = nkbd_disconnect,
162};
163
164module_serio_driver(nkbd_drv);
165