summaryrefslogtreecommitdiff
path: root/drivers/input/joystick/spaceorb.c
blob: f5e496679e2bb35e0c151f9bbb973bdfa100c772 (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
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
/*
 * $Id: spaceorb.c,v 1.15 2002/01/22 20:29:19 vojtech Exp $
 *
 *  Copyright (c) 1999-2001 Vojtech Pavlik
 *
 *  Based on the work of:
 *	David Thompson
 */

/*
 * SpaceTec SpaceOrb 360 and Avenger 6dof controller driver for Linux
 */

/*
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 *
 *  Should you need to contact me, the author, you can do so either by
 * e-mail - mail your message to <vojtech@ucw.cz>, or by paper mail:
 * Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic
 */

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

#define DRIVER_DESC	"SpaceTec SpaceOrb 360 and Avenger 6dof controller driver"

MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_LICENSE("GPL");

/*
 * Constants.
 */

#define SPACEORB_MAX_LENGTH	64

static int spaceorb_buttons[] = { BTN_TL, BTN_TR, BTN_Y, BTN_X, BTN_B, BTN_A };
static int spaceorb_axes[] = { ABS_X, ABS_Y, ABS_Z, ABS_RX, ABS_RY, ABS_RZ };

/*
 * Per-Orb data.
 */

struct spaceorb {
	struct input_dev *dev;
	int idx;
	unsigned char data[SPACEORB_MAX_LENGTH];
	char phys[32];
};

static unsigned char spaceorb_xor[] = "SpaceWare";

static unsigned char *spaceorb_errors[] = { "EEPROM storing 0 failed", "Receive queue overflow", "Transmit queue timeout",
		"Bad packet", "Power brown-out", "EEPROM checksum error", "Hardware fault" };

/*
 * spaceorb_process_packet() decodes packets the driver receives from the
 * SpaceOrb.
 */

static void spaceorb_process_packet(struct spaceorb *spaceorb)
{
	struct input_dev *dev = spaceorb->dev;
	unsigned char *data = spaceorb->data;
	unsigned char c = 0;
	int axes[6];
	int i;

	if (spaceorb->idx < 2) return;
	for (i = 0; i < spaceorb->idx; i++) c ^= data[i];
	if (c) return;

	switch (data[0]) {

		case 'R':				/* Reset packet */
			spaceorb->data[spaceorb->idx - 1] = 0;
			for (i = 1; i < spaceorb->idx && spaceorb->data[i] == ' '; i++);
			printk(KERN_INFO "input: %s [%s] is %s\n",
				 dev->name, spaceorb->data + i, spaceorb->phys);
			break;

		case 'D':				/* Ball + button data */
			if (spaceorb->idx != 12) return;
			for (i = 0; i < 9; i++) spaceorb->data[i+2] ^= spaceorb_xor[i];
			axes[0] = ( data[2]	 << 3) | (data[ 3] >> 4);
			axes[1] = ((data[3] & 0x0f) << 6) | (data[ 4] >> 1);
			axes[2] = ((data[4] & 0x01) << 9) | (data[ 5] << 2) | (data[4] >> 5);
			axes[3] = ((data[6] & 0x1f) << 5) | (data[ 7] >> 2);
			axes[4] = ((data[7] & 0x03) << 8) | (data[ 8] << 1) | (data[7] >> 6);
			axes[5] = ((data[9] & 0x3f) << 4) | (data[10] >> 3);
			for (i = 0; i < 6; i++)
				input_report_abs(dev, spaceorb_axes[i], axes[i] - ((axes[i] & 0x200) ? 1024 : 0));
			for (i = 0; i < 6; i++)
				input_report_key(dev, spaceorb_buttons[i], (data[1] >> i) & 1);
			break;

		case 'K':				/* Button data */
			if (spaceorb->idx != 5) return;
			for (i = 0; i < 6; i++)
				input_report_key(dev, spaceorb_buttons[i], (data[2] >> i) & 1);

			break;

		case 'E':				/* Error packet */
			if (spaceorb->idx != 4) return;
			printk(KERN_ERR "spaceorb: Device error. [ ");
			for (i = 0; i < 7; i++) if (data[1] & (1 << i)) printk("%s ", spaceorb_errors[i]);
			printk("]\n");
			break;
	}

	input_sync(dev);
}

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

	if (~data & 0x80) {
		if (spaceorb->idx) spaceorb_process_packet(spaceorb);
		spaceorb->idx = 0;
	}
	if (spaceorb->idx < SPACEORB_MAX_LENGTH)
		spaceorb->data[spaceorb->idx++] = data & 0x7f;
	return IRQ_HANDLED;
}

/*
 * spaceorb_disconnect() is the opposite of spaceorb_connect()
 */

static void spaceorb_disconnect(struct serio *serio)
{
	struct spaceorb* spaceorb = serio_get_drvdata(serio);

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

/*
 * spaceorb_connect() is the routine that is called when someone adds a
 * new serio device that supports SpaceOrb/Avenger protocol and registers
 * it as an input device.
 */

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

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

	spaceorb->dev = input_dev;
	snprintf(spaceorb->phys, sizeof(spaceorb->phys), "%s/input0", serio->phys);

	input_dev->name = "SpaceTec SpaceOrb 360 / Avenger";
	input_dev->phys = spaceorb->phys;
	input_dev->id.bustype = BUS_RS232;
	input_dev->id.vendor = SERIO_SPACEORB;
	input_dev->id.product = 0x0001;
	input_dev->id.version = 0x0100;
	input_dev->cdev.dev = &serio->dev;

	input_dev->evbit[0] = BIT(EV_KEY) | BIT(EV_ABS);

	for (i = 0; i < 6; i++)
		set_bit(spaceorb_buttons[i], input_dev->keybit);

	for (i = 0; i < 6; i++)
		input_set_abs_params(input_dev, spaceorb_axes[i], -508, 508, 0, 0);

	serio_set_drvdata(serio, spaceorb);

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

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

	return 0;

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

/*
 * The serio driver structure.
 */

static struct serio_device_id spaceorb_serio_ids[] = {
	{
		.type	= SERIO_RS232,
		.proto	= SERIO_SPACEORB,
		.id	= SERIO_ANY,
		.extra	= SERIO_ANY,
	},
	{ 0 }
};

MODULE_DEVICE_TABLE(serio, spaceorb_serio_ids);

static struct serio_driver spaceorb_drv = {
	.driver		= {
		.name	= "spaceorb",
	},
	.description	= DRIVER_DESC,
	.id_table	= spaceorb_serio_ids,
	.interrupt	= spaceorb_interrupt,
	.connect	= spaceorb_connect,
	.disconnect	= spaceorb_disconnect,
};

/*
 * The functions for inserting/removing us as a module.
 */

static int __init spaceorb_init(void)
{
	return serio_register_driver(&spaceorb_drv);
}

static void __exit spaceorb_exit(void)
{
	serio_unregister_driver(&spaceorb_drv);
}

module_init(spaceorb_init);
module_exit(spaceorb_exit);