summaryrefslogtreecommitdiffstats
path: root/drivers/input/keyboard/newtonkbd.c
blob: df00a119aa9a2481dfc55e263acd2ad6b54b5291 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
// SPDX-License-Identifier: GPL-2.0-or-later
/*
 *  Copyright (c) 2000 Justin Cormack
 */

/*
 * Newton keyboard driver for Linux
 */

#include <linux/slab.h>
#include <linux/module.h>
#include <linux/input.h>
#include <linux/serio.h>

#define DRIVER_DESC	"Newton keyboard driver"

MODULE_AUTHOR("Justin Cormack <j.cormack@doc.ic.ac.uk>");
MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_LICENSE("GPL");

#define NKBD_KEY	0x7f
#define NKBD_PRESS	0x80

static unsigned char nkbd_keycode[128] = {
	KEY_A, KEY_S, KEY_D, KEY_F, KEY_H, KEY_G, KEY_Z, KEY_X,
	KEY_C, KEY_V, 0, KEY_B, KEY_Q, KEY_W, KEY_E, KEY_R,
	KEY_Y, KEY_T, KEY_1, KEY_2, KEY_3, KEY_4, KEY_6, KEY_5,
	KEY_EQUAL, KEY_9, KEY_7, KEY_MINUS, KEY_8, KEY_0, KEY_RIGHTBRACE, KEY_O,
	KEY_U, KEY_LEFTBRACE, KEY_I, KEY_P, KEY_ENTER, KEY_L, KEY_J, KEY_APOSTROPHE,
	KEY_K, KEY_SEMICOLON, KEY_BACKSLASH, KEY_COMMA, KEY_SLASH, KEY_N, KEY_M, KEY_DOT,
	KEY_TAB, KEY_SPACE, KEY_GRAVE, KEY_DELETE, 0, 0, 0, KEY_LEFTMETA,
	KEY_LEFTSHIFT, KEY_CAPSLOCK, KEY_LEFTALT, KEY_LEFTCTRL, KEY_RIGHTSHIFT, 0, 0, 0,
	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
	KEY_LEFT, KEY_RIGHT, KEY_DOWN, KEY_UP, 0
};

struct nkbd {
	unsigned char keycode[128];
	struct input_dev *dev;
	struct serio *serio;
	char phys[32];
};

static irqreturn_t nkbd_interrupt(struct serio *serio,
		unsigned char data, unsigned int flags)
{
	struct nkbd *nkbd = serio_get_drvdata(serio);

	/* invalid scan codes are probably the init sequence, so we ignore them */
	if (nkbd->keycode[data & NKBD_KEY]) {
		input_report_key(nkbd->dev, nkbd->keycode[data & NKBD_KEY], data & NKBD_PRESS);
		input_sync(nkbd->dev);
	}

	else if (data == 0xe7) /* end of init sequence */
		printk(KERN_INFO "input: %s on %s\n", nkbd->dev->name, serio->phys);
	return IRQ_HANDLED;

}

static int nkbd_connect(struct serio *serio, struct serio_driver *drv)
{
	struct nkbd *nkbd;
	struct input_dev *input_dev;
	int err = -ENOMEM;
	int i;

	nkbd = kzalloc(sizeof(struct nkbd), GFP_KERNEL);
	input_dev = input_allocate_device();
	if (!nkbd || !input_dev)
		goto fail1;

	nkbd->serio = serio;
	nkbd->dev = input_dev;
	snprintf(nkbd->phys, sizeof(nkbd->phys), "%s/input0", serio->phys);
	memcpy(nkbd->keycode, nkbd_keycode, sizeof(nkbd->keycode));

	input_dev->name = "Newton Keyboard";
	input_dev->phys = nkbd->phys;
	input_dev->id.bustype = BUS_RS232;
	input_dev->id.vendor = SERIO_NEWTON;
	input_dev->id.product = 0x0001;
	input_dev->id.version = 0x0100;
	input_dev->dev.parent = &serio->dev;

	input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REP);
	input_dev->keycode = nkbd->keycode;
	input_dev->keycodesize = sizeof(unsigned char);
	input_dev->keycodemax = ARRAY_SIZE(nkbd_keycode);
	for (i = 0; i < 128; i++)
		set_bit(nkbd->keycode[i], input_dev->keybit);
	clear_bit(0, input_dev->keybit);

	serio_set_drvdata(serio, nkbd);

	err = serio_open(serio, drv);
	if (err)
		goto fail2;

	err = input_register_device(nkbd->dev);
	if (err)
		goto fail3;

	return 0;

 fail3:	serio_close(serio);
 fail2:	serio_set_drvdata(serio, NULL);
 fail1:	input_free_device(input_dev);
	kfree(nkbd);
	return err;
}

static void nkbd_disconnect(struct serio *serio)
{
	struct nkbd *nkbd = serio_get_drvdata(serio);

	serio_close(serio);
	serio_set_drvdata(serio, NULL);
	input_unregister_device(nkbd->dev);
	kfree(nkbd);
}

static const struct serio_device_id nkbd_serio_ids[] = {
	{
		.type	= SERIO_RS232,
		.proto	= SERIO_NEWTON,
		.id	= SERIO_ANY,
		.extra	= SERIO_ANY,
	},
	{ 0 }
};

MODULE_DEVICE_TABLE(serio, nkbd_serio_ids);

static struct serio_driver nkbd_drv = {
	.driver		= {
		.name	= "newtonkbd",
	},
	.description	= DRIVER_DESC,
	.id_table	= nkbd_serio_ids,
	.interrupt	= nkbd_interrupt,
	.connect	= nkbd_connect,
	.disconnect	= nkbd_disconnect,
};

module_serio_driver(nkbd_drv);