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1da177e4 | 1 | /* |
1da177e4 LT |
2 | * Copyright (c) 1999-2001 Vojtech Pavlik |
3 | */ | |
4 | ||
5 | /* | |
6 | * Magellan and Space Mouse 6dof controller 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 <vojtech@ucw.cz>, or by paper mail: | |
26 | * Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic | |
27 | */ | |
28 | ||
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> | |
1da177e4 LT |
34 | |
35 | #define DRIVER_DESC "Magellan and SpaceMouse 6dof controller driver" | |
36 | ||
37 | MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>"); | |
38 | MODULE_DESCRIPTION(DRIVER_DESC); | |
39 | MODULE_LICENSE("GPL"); | |
40 | ||
41 | /* | |
42 | * Definitions & global arrays. | |
43 | */ | |
44 | ||
45 | #define MAGELLAN_MAX_LENGTH 32 | |
46 | ||
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 }; | |
1da177e4 LT |
49 | |
50 | /* | |
51 | * Per-Magellan data. | |
52 | */ | |
53 | ||
54 | struct magellan { | |
17dd3f0f | 55 | struct input_dev *dev; |
1da177e4 LT |
56 | int idx; |
57 | unsigned char data[MAGELLAN_MAX_LENGTH]; | |
58 | char phys[32]; | |
59 | }; | |
60 | ||
61 | /* | |
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 | |
65 | * processing. | |
66 | */ | |
67 | ||
68 | static int magellan_crunch_nibbles(unsigned char *data, int count) | |
69 | { | |
70 | static unsigned char nibbles[16] = "0AB3D56GH9:K<MN?"; | |
71 | ||
72 | do { | |
73 | if (data[count] == nibbles[data[count] & 0xf]) | |
74 | data[count] = data[count] & 0xf; | |
75 | else | |
76 | return -1; | |
77 | } while (--count); | |
78 | ||
79 | return 0; | |
80 | } | |
81 | ||
7d12e780 | 82 | static void magellan_process_packet(struct magellan* magellan) |
1da177e4 | 83 | { |
17dd3f0f | 84 | struct input_dev *dev = magellan->dev; |
1da177e4 LT |
85 | unsigned char *data = magellan->data; |
86 | int i, t; | |
87 | ||
88 | if (!magellan->idx) return; | |
89 | ||
1da177e4 LT |
90 | switch (magellan->data[0]) { |
91 | ||
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); | |
99 | break; | |
100 | ||
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); | |
106 | break; | |
107 | } | |
108 | ||
109 | input_sync(dev); | |
110 | } | |
111 | ||
112 | static irqreturn_t magellan_interrupt(struct serio *serio, | |
7d12e780 | 113 | unsigned char data, unsigned int flags) |
1da177e4 LT |
114 | { |
115 | struct magellan* magellan = serio_get_drvdata(serio); | |
116 | ||
117 | if (data == '\r') { | |
7d12e780 | 118 | magellan_process_packet(magellan); |
1da177e4 LT |
119 | magellan->idx = 0; |
120 | } else { | |
121 | if (magellan->idx < MAGELLAN_MAX_LENGTH) | |
122 | magellan->data[magellan->idx++] = data; | |
123 | } | |
124 | return IRQ_HANDLED; | |
125 | } | |
126 | ||
127 | /* | |
128 | * magellan_disconnect() is the opposite of magellan_connect() | |
129 | */ | |
130 | ||
131 | static void magellan_disconnect(struct serio *serio) | |
132 | { | |
133 | struct magellan* magellan = serio_get_drvdata(serio); | |
134 | ||
1da177e4 LT |
135 | serio_close(serio); |
136 | serio_set_drvdata(serio, NULL); | |
17dd3f0f | 137 | input_unregister_device(magellan->dev); |
1da177e4 LT |
138 | kfree(magellan); |
139 | } | |
140 | ||
141 | /* | |
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 | |
144 | * an input device. | |
145 | */ | |
146 | ||
147 | static int magellan_connect(struct serio *serio, struct serio_driver *drv) | |
148 | { | |
149 | struct magellan *magellan; | |
17dd3f0f DT |
150 | struct input_dev *input_dev; |
151 | int err = -ENOMEM; | |
152 | int i; | |
1da177e4 | 153 | |
17dd3f0f DT |
154 | magellan = kzalloc(sizeof(struct magellan), GFP_KERNEL); |
155 | input_dev = input_allocate_device(); | |
156 | if (!magellan || !input_dev) | |
127278ce | 157 | goto fail1; |
1da177e4 | 158 | |
17dd3f0f | 159 | magellan->dev = input_dev; |
10ca4c0a | 160 | snprintf(magellan->phys, sizeof(magellan->phys), "%s/input0", serio->phys); |
1da177e4 | 161 | |
17dd3f0f DT |
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; | |
935e658e | 168 | input_dev->dev.parent = &serio->dev; |
1da177e4 | 169 | |
7b19ada2 | 170 | input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS); |
1da177e4 | 171 | |
17dd3f0f DT |
172 | for (i = 0; i < 9; i++) |
173 | set_bit(magellan_buttons[i], input_dev->keybit); | |
1da177e4 | 174 | |
17dd3f0f DT |
175 | for (i = 0; i < 6; i++) |
176 | input_set_abs_params(input_dev, magellan_axes[i], -360, 360, 0, 0); | |
1da177e4 LT |
177 | |
178 | serio_set_drvdata(serio, magellan); | |
179 | ||
180 | err = serio_open(serio, drv); | |
17dd3f0f | 181 | if (err) |
127278ce DT |
182 | goto fail2; |
183 | ||
184 | err = input_register_device(magellan->dev); | |
185 | if (err) | |
186 | goto fail3; | |
1da177e4 LT |
187 | |
188 | return 0; | |
17dd3f0f | 189 | |
127278ce DT |
190 | fail3: serio_close(serio); |
191 | fail2: serio_set_drvdata(serio, NULL); | |
192 | fail1: input_free_device(input_dev); | |
17dd3f0f DT |
193 | kfree(magellan); |
194 | return err; | |
1da177e4 LT |
195 | } |
196 | ||
197 | /* | |
198 | * The serio driver structure. | |
199 | */ | |
200 | ||
201 | static struct serio_device_id magellan_serio_ids[] = { | |
202 | { | |
203 | .type = SERIO_RS232, | |
204 | .proto = SERIO_MAGELLAN, | |
205 | .id = SERIO_ANY, | |
206 | .extra = SERIO_ANY, | |
207 | }, | |
208 | { 0 } | |
209 | }; | |
210 | ||
211 | MODULE_DEVICE_TABLE(serio, magellan_serio_ids); | |
212 | ||
213 | static struct serio_driver magellan_drv = { | |
214 | .driver = { | |
215 | .name = "magellan", | |
216 | }, | |
217 | .description = DRIVER_DESC, | |
218 | .id_table = magellan_serio_ids, | |
219 | .interrupt = magellan_interrupt, | |
220 | .connect = magellan_connect, | |
221 | .disconnect = magellan_disconnect, | |
222 | }; | |
223 | ||
65ac9f7a | 224 | module_serio_driver(magellan_drv); |