2 * Copyright (c) 1999-2001 Vojtech Pavlik
6 * Magellan and Space Mouse 6dof controller driver for Linux
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.
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.
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
24 * Should you need to contact me, the author, you can do so either by
25 * e-mail - mail your message to <vojtech@ucw.cz>, or by paper mail:
26 * Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic
29 #include <linux/kernel.h>
30 #include <linux/module.h>
31 #include <linux/slab.h>
32 #include <linux/input.h>
33 #include <linux/serio.h>
35 #define DRIVER_DESC "Magellan and SpaceMouse 6dof controller driver"
37 MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
38 MODULE_DESCRIPTION(DRIVER_DESC);
39 MODULE_LICENSE("GPL");
42 * Definitions & global arrays.
45 #define MAGELLAN_MAX_LENGTH 32
47 static int magellan_buttons[] = { BTN_0, BTN_1, BTN_2, BTN_3, BTN_4, BTN_5, BTN_6, BTN_7, BTN_8 };
48 static int magellan_axes[] = { ABS_X, ABS_Y, ABS_Z, ABS_RX, ABS_RY, ABS_RZ };
55 struct input_dev *dev;
57 unsigned char data[MAGELLAN_MAX_LENGTH];
62 * magellan_crunch_nibbles() verifies that the bytes sent from the Magellan
63 * have correct upper nibbles for the lower ones, if not, the packet will
64 * be thrown away. It also strips these upper halves to simplify further
68 static int magellan_crunch_nibbles(unsigned char *data, int count)
70 static unsigned char nibbles[16] = "0AB3D56GH9:K<MN?";
73 if (data[count] == nibbles[data[count] & 0xf])
74 data[count] = data[count] & 0xf;
82 static void magellan_process_packet(struct magellan* magellan)
84 struct input_dev *dev = magellan->dev;
85 unsigned char *data = magellan->data;
88 if (!magellan->idx) return;
90 switch (magellan->data[0]) {
92 case 'd': /* Axis data */
93 if (magellan->idx != 25) return;
94 if (magellan_crunch_nibbles(data, 24)) return;
95 for (i = 0; i < 6; i++)
96 input_report_abs(dev, magellan_axes[i],
97 (data[(i << 2) + 1] << 12 | data[(i << 2) + 2] << 8 |
98 data[(i << 2) + 3] << 4 | data[(i << 2) + 4]) - 32768);
101 case 'k': /* Button data */
102 if (magellan->idx != 4) return;
103 if (magellan_crunch_nibbles(data, 3)) return;
104 t = (data[1] << 1) | (data[2] << 5) | data[3];
105 for (i = 0; i < 9; i++) input_report_key(dev, magellan_buttons[i], (t >> i) & 1);
112 static irqreturn_t magellan_interrupt(struct serio *serio,
113 unsigned char data, unsigned int flags)
115 struct magellan* magellan = serio_get_drvdata(serio);
118 magellan_process_packet(magellan);
121 if (magellan->idx < MAGELLAN_MAX_LENGTH)
122 magellan->data[magellan->idx++] = data;
128 * magellan_disconnect() is the opposite of magellan_connect()
131 static void magellan_disconnect(struct serio *serio)
133 struct magellan* magellan = serio_get_drvdata(serio);
136 serio_set_drvdata(serio, NULL);
137 input_unregister_device(magellan->dev);
142 * magellan_connect() is the routine that is called when someone adds a
143 * new serio device that supports Magellan protocol and registers it as
147 static int magellan_connect(struct serio *serio, struct serio_driver *drv)
149 struct magellan *magellan;
150 struct input_dev *input_dev;
154 magellan = kzalloc(sizeof(struct magellan), GFP_KERNEL);
155 input_dev = input_allocate_device();
156 if (!magellan || !input_dev)
159 magellan->dev = input_dev;
160 snprintf(magellan->phys, sizeof(magellan->phys), "%s/input0", serio->phys);
162 input_dev->name = "LogiCad3D Magellan / SpaceMouse";
163 input_dev->phys = magellan->phys;
164 input_dev->id.bustype = BUS_RS232;
165 input_dev->id.vendor = SERIO_MAGELLAN;
166 input_dev->id.product = 0x0001;
167 input_dev->id.version = 0x0100;
168 input_dev->dev.parent = &serio->dev;
170 input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
172 for (i = 0; i < 9; i++)
173 set_bit(magellan_buttons[i], input_dev->keybit);
175 for (i = 0; i < 6; i++)
176 input_set_abs_params(input_dev, magellan_axes[i], -360, 360, 0, 0);
178 serio_set_drvdata(serio, magellan);
180 err = serio_open(serio, drv);
184 err = input_register_device(magellan->dev);
190 fail3: serio_close(serio);
191 fail2: serio_set_drvdata(serio, NULL);
192 fail1: input_free_device(input_dev);
198 * The serio driver structure.
201 static struct serio_device_id magellan_serio_ids[] = {
204 .proto = SERIO_MAGELLAN,
211 MODULE_DEVICE_TABLE(serio, magellan_serio_ids);
213 static struct serio_driver magellan_drv = {
217 .description = DRIVER_DESC,
218 .id_table = magellan_serio_ids,
219 .interrupt = magellan_interrupt,
220 .connect = magellan_connect,
221 .disconnect = magellan_disconnect,
224 module_serio_driver(magellan_drv);