1 /*
2 * $Id: warrior.c,v 1.14 2002/01/22 20:32:10 vojtech Exp $
3 *
4 * Copyright (c) 1999-2001 Vojtech Pavlik
5 */
6
7 /*
8 * Logitech WingMan Warrior joystick driver for Linux
9 */
10
11 /*
12 * This program is free warftware; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License as published by
14 * the Free Software Foundation; either version 2 of the License, or
15 * (at your option) any later version.
16 *
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
21 *
22 * You should have received a copy of the GNU General Public License
23 * along with this program; if not, write to the Free Software
24 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
25 *
26 * Should you need to contact me, the author, you can do so either by
27 * e-mail - mail your message to <vojtech@ucw.cz>, or by paper mail:
28 * Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic
29 */
30
31 #include <linux/kernel.h>
32 #include <linux/module.h>
33 #include <linux/slab.h>
34 #include <linux/input.h>
35 #include <linux/serio.h>
36 #include <linux/init.h>
37
38 #define DRIVER_DESC "Logitech WingMan Warrior joystick driver"
39
40 MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
41 MODULE_DESCRIPTION(DRIVER_DESC);
42 MODULE_LICENSE("GPL");
43
44 /*
45 * Constants.
46 */
47
48 #define WARRIOR_MAX_LENGTH 16
49 static char warrior_lengths[] = { 0, 4, 12, 3, 4, 4, 0, 0 };
50
51 /*
52 * Per-Warrior data.
53 */
54
55 struct warrior {
56 struct input_dev *dev;
57 int idx, len;
58 unsigned char data[WARRIOR_MAX_LENGTH];
59 char phys[32];
60 };
61
62 /*
63 * warrior_process_packet() decodes packets the driver receives from the
64 * Warrior. It updates the data accordingly.
65 */
66
67 static void warrior_process_packet(struct warrior *warrior)
68 {
69 struct input_dev *dev = warrior->dev;
70 unsigned char *data = warrior->data;
71
72 if (!warrior->idx) return;
73
74 switch ((data[0] >> 4) & 7) {
75 case 1: /* Button data */
76 input_report_key(dev, BTN_TRIGGER, data[3] & 1);
77 input_report_key(dev, BTN_THUMB, (data[3] >> 1) & 1);
78 input_report_key(dev, BTN_TOP, (data[3] >> 2) & 1);
79 input_report_key(dev, BTN_TOP2, (data[3] >> 3) & 1);
80 break;
81 case 3: /* XY-axis info->data */
82 input_report_abs(dev, ABS_X, ((data[0] & 8) << 5) - (data[2] | ((data[0] & 4) << 5)));
83 input_report_abs(dev, ABS_Y, (data[1] | ((data[0] & 1) << 7)) - ((data[0] & 2) << 7));
84 break;
85 case 5: /* Throttle, spinner, hat info->data */
86 input_report_abs(dev, ABS_THROTTLE, (data[1] | ((data[0] & 1) << 7)) - ((data[0] & 2) << 7));
87 input_report_abs(dev, ABS_HAT0X, (data[3] & 2 ? 1 : 0) - (data[3] & 1 ? 1 : 0));
88 input_report_abs(dev, ABS_HAT0Y, (data[3] & 8 ? 1 : 0) - (data[3] & 4 ? 1 : 0));
89 input_report_rel(dev, REL_DIAL, (data[2] | ((data[0] & 4) << 5)) - ((data[0] & 8) << 5));
90 break;
91 }
92 input_sync(dev);
93 }
94
95 /*
96 * warrior_interrupt() is called by the low level driver when characters
97 * are ready for us. We then buffer them for further processing, or call the
98 * packet processing routine.
99 */
100
101 static irqreturn_t warrior_interrupt(struct serio *serio,
102 unsigned char data, unsigned int flags)
103 {
104 struct warrior *warrior = serio_get_drvdata(serio);
105
106 if (data & 0x80) {
107 if (warrior->idx) warrior_process_packet(warrior);
108 warrior->idx = 0;
109 warrior->len = warrior_lengths[(data >> 4) & 7];
110 }
111
112 if (warrior->idx < warrior->len)
113 warrior->data[warrior->idx++] = data;
114
115 if (warrior->idx == warrior->len) {
116 if (warrior->idx) warrior_process_packet(warrior);
117 warrior->idx = 0;
118 warrior->len = 0;
119 }
120 return IRQ_HANDLED;
121 }
122
123 /*
124 * warrior_disconnect() is the opposite of warrior_connect()
125 */
126
127 static void warrior_disconnect(struct serio *serio)
128 {
129 struct warrior *warrior = serio_get_drvdata(serio);
130
131 serio_close(serio);
132 serio_set_drvdata(serio, NULL);
133 input_unregister_device(warrior->dev);
134 kfree(warrior);
135 }
136
137 /*
138 * warrior_connect() is the routine that is called when someone adds a
139 * new serio device. It looks for the Warrior, and if found, registers
140 * it as an input device.
141 */
142
143 static int warrior_connect(struct serio *serio, struct serio_driver *drv)
144 {
145 struct warrior *warrior;
146 struct input_dev *input_dev;
147 int err = -ENOMEM;
148
149 warrior = kzalloc(sizeof(struct warrior), GFP_KERNEL);
150 input_dev = input_allocate_device();
151 if (!warrior || !input_dev)
152 goto fail1;
153
154 warrior->dev = input_dev;
155 snprintf(warrior->phys, sizeof(warrior->phys), "%s/input0", serio->phys);
156
157 input_dev->name = "Logitech WingMan Warrior";
158 input_dev->phys = warrior->phys;
159 input_dev->id.bustype = BUS_RS232;
160 input_dev->id.vendor = SERIO_WARRIOR;
161 input_dev->id.product = 0x0001;
162 input_dev->id.version = 0x0100;
163 input_dev->dev.parent = &serio->dev;
164
165 input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REL) |
166 BIT_MASK(EV_ABS);
167 input_dev->keybit[BIT_WORD(BTN_TRIGGER)] = BIT_MASK(BTN_TRIGGER) |
168 BIT_MASK(BTN_THUMB) | BIT_MASK(BTN_TOP) | BIT_MASK(BTN_TOP2);
169 input_dev->relbit[0] = BIT_MASK(REL_DIAL);
170 input_set_abs_params(input_dev, ABS_X, -64, 64, 0, 8);
171 input_set_abs_params(input_dev, ABS_Y, -64, 64, 0, 8);
172 input_set_abs_params(input_dev, ABS_THROTTLE, -112, 112, 0, 0);
173 input_set_abs_params(input_dev, ABS_HAT0X, -1, 1, 0, 0);
174 input_set_abs_params(input_dev, ABS_HAT0Y, -1, 1, 0, 0);
175
176 serio_set_drvdata(serio, warrior);
177
178 err = serio_open(serio, drv);
179 if (err)
180 goto fail2;
181
182 err = input_register_device(warrior->dev);
183 if (err)
184 goto fail3;
185
186 return 0;
187
188 fail3: serio_close(serio);
189 fail2: serio_set_drvdata(serio, NULL);
190 fail1: input_free_device(input_dev);
191 kfree(warrior);
192 return err;
193 }
194
195 /*
196 * The serio driver structure.
197 */
198
199 static struct serio_device_id warrior_serio_ids[] = {
200 {
201 .type = SERIO_RS232,
202 .proto = SERIO_WARRIOR,
203 .id = SERIO_ANY,
204 .extra = SERIO_ANY,
205 },
206 { 0 }
207 };
208
209 MODULE_DEVICE_TABLE(serio, warrior_serio_ids);
210
211 static struct serio_driver warrior_drv = {
212 .driver = {
213 .name = "warrior",
214 },
215 .description = DRIVER_DESC,
216 .id_table = warrior_serio_ids,
217 .interrupt = warrior_interrupt,
218 .connect = warrior_connect,
219 .disconnect = warrior_disconnect,
220 };
221
222 /*
223 * The functions for inserting/removing us as a module.
224 */
225
226 static int __init warrior_init(void)
227 {
228 return serio_register_driver(&warrior_drv);
229 }
230
231 static void __exit warrior_exit(void)
232 {
233 serio_unregister_driver(&warrior_drv);
234 }
235
236 module_init(warrior_init);
237 module_exit(warrior_exit);
238
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