1 /*
2 * $Id: gf2k.c,v 1.19 2002/01/22 20:27:43 vojtech Exp $
3 *
4 * Copyright (c) 1998-2001 Vojtech Pavlik
5 */
6
7 /*
8 * Genius Flight 2000 joystick driver for Linux
9 */
10
11 /*
12 * This program is free software; 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/delay.h>
32 #include <linux/kernel.h>
33 #include <linux/slab.h>
34 #include <linux/module.h>
35 #include <linux/init.h>
36 #include <linux/input.h>
37 #include <linux/gameport.h>
38
39 MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
40 MODULE_DESCRIPTION("Genius Flight 2000 joystick driver");
41 MODULE_LICENSE("GPL");
42
43 #define GF2K_START 400 /* The time we wait for the first bit [400 us] */
44 #define GF2K_STROBE 40 /* The time we wait for the first bit [40 us] */
45 #define GF2K_TIMEOUT 4 /* Wait for everything to settle [4 ms] */
46 #define GF2K_LENGTH 80 /* Max number of triplets in a packet */
47 #define GF2K_REFRESH HZ/50 /* Time between joystick polls [20 ms] */
48
49 /*
50 * Genius joystick ids ...
51 */
52
53 #define GF2K_ID_G09 1
54 #define GF2K_ID_F30D 2
55 #define GF2K_ID_F30 3
56 #define GF2K_ID_F31D 4
57 #define GF2K_ID_F305 5
58 #define GF2K_ID_F23P 6
59 #define GF2K_ID_F31 7
60 #define GF2K_ID_MAX 7
61
62 static char gf2k_length[] = { 40, 40, 40, 40, 40, 40, 40, 40 };
63 static char gf2k_hat_to_axis[][2] = {{ 0, 0}, { 0,-1}, { 1,-1}, { 1, 0}, { 1, 1}, { 0, 1}, {-1, 1}, {-1, 0}, {-1,-1}};
64
65 static char *gf2k_names[] = {"", "Genius G-09D", "Genius F-30D", "Genius F-30", "Genius MaxFighter F-31D",
66 "Genius F-30-5", "Genius Flight2000 F-23", "Genius F-31"};
67 static unsigned char gf2k_hats[] = { 0, 2, 0, 0, 2, 0, 2, 0 };
68 static unsigned char gf2k_axes[] = { 0, 2, 0, 0, 4, 0, 4, 0 };
69 static unsigned char gf2k_joys[] = { 0, 0, 0, 0,10, 0, 8, 0 };
70 static unsigned char gf2k_pads[] = { 0, 6, 0, 0, 0, 0, 0, 0 };
71 static unsigned char gf2k_lens[] = { 0,18, 0, 0,18, 0,18, 0 };
72
73 static unsigned char gf2k_abs[] = { ABS_X, ABS_Y, ABS_THROTTLE, ABS_RUDDER, ABS_GAS, ABS_BRAKE };
74 static short gf2k_btn_joy[] = { BTN_TRIGGER, BTN_THUMB, BTN_TOP, BTN_TOP2, BTN_BASE, BTN_BASE2, BTN_BASE3, BTN_BASE4 };
75 static short gf2k_btn_pad[] = { BTN_A, BTN_B, BTN_C, BTN_X, BTN_Y, BTN_Z, BTN_TL, BTN_TR, BTN_TL2, BTN_TR2, BTN_START, BTN_SELECT };
76
77
78 static short gf2k_seq_reset[] = { 240, 340, 0 };
79 static short gf2k_seq_digital[] = { 590, 320, 860, 0 };
80
81 struct gf2k {
82 struct gameport *gameport;
83 struct timer_list timer;
84 struct input_dev dev;
85 int reads;
86 int bads;
87 int used;
88 unsigned char id;
89 unsigned char length;
90 char phys[32];
91 };
92
93 /*
94 * gf2k_read_packet() reads a Genius Flight2000 packet.
95 */
96
97 static int gf2k_read_packet(struct gameport *gameport, int length, char *data)
98 {
99 unsigned char u, v;
100 int i;
101 unsigned int t, p;
102 unsigned long flags;
103
104 t = gameport_time(gameport, GF2K_START);
105 p = gameport_time(gameport, GF2K_STROBE);
106
107 i = 0;
108
109 local_irq_save(flags);
110
111 gameport_trigger(gameport);
112 v = gameport_read(gameport);
113
114 while (t > 0 && i < length) {
115 t--; u = v;
116 v = gameport_read(gameport);
117 if (v & ~u & 0x10) {
118 data[i++] = v >> 5;
119 t = p;
120 }
121 }
122
123 local_irq_restore(flags);
124
125 return i;
126 }
127
128 /*
129 * gf2k_trigger_seq() initializes a Genius Flight2000 joystick
130 * into digital mode.
131 */
132
133 static void gf2k_trigger_seq(struct gameport *gameport, short *seq)
134 {
135
136 unsigned long flags;
137 int i, t;
138
139 local_irq_save(flags);
140
141 i = 0;
142 do {
143 gameport_trigger(gameport);
144 t = gameport_time(gameport, GF2K_TIMEOUT * 1000);
145 while ((gameport_read(gameport) & 1) && t) t--;
146 udelay(seq[i]);
147 } while (seq[++i]);
148
149 gameport_trigger(gameport);
150
151 local_irq_restore(flags);
152 }
153
154 /*
155 * js_sw_get_bits() composes bits from the triplet buffer into a __u64.
156 * Parameter 'pos' is bit number inside packet where to start at, 'num' is number
157 * of bits to be read, 'shift' is offset in the resulting __u64 to start at, bits
158 * is number of bits per triplet.
159 */
160
161 #define GB(p,n,s) gf2k_get_bits(data, p, n, s)
162
163 static int gf2k_get_bits(unsigned char *buf, int pos, int num, int shift)
164 {
165 __u64 data = 0;
166 int i;
167
168 for (i = 0; i < num / 3 + 2; i++)
169 data |= buf[pos / 3 + i] << (i * 3);
170 data >>= pos % 3;
171 data &= (1 << num) - 1;
172 data <<= shift;
173
174 return data;
175 }
176
177 static void gf2k_read(struct gf2k *gf2k, unsigned char *data)
178 {
179 struct input_dev *dev = &gf2k->dev;
180 int i, t;
181
182 for (i = 0; i < 4 && i < gf2k_axes[gf2k->id]; i++)
183 input_report_abs(dev, gf2k_abs[i], GB(i<<3,8,0) | GB(i+46,1,8) | GB(i+50,1,9));
184
185 for (i = 0; i < 2 && i < gf2k_axes[gf2k->id] - 4; i++)
186 input_report_abs(dev, gf2k_abs[i], GB(i*9+60,8,0) | GB(i+54,1,9));
187
188 t = GB(40,4,0);
189
190 for (i = 0; i < gf2k_hats[gf2k->id]; i++)
191 input_report_abs(dev, ABS_HAT0X + i, gf2k_hat_to_axis[t][i]);
192
193 t = GB(44,2,0) | GB(32,8,2) | GB(78,2,10);
194
195 for (i = 0; i < gf2k_joys[gf2k->id]; i++)
196 input_report_key(dev, gf2k_btn_joy[i], (t >> i) & 1);
197
198 for (i = 0; i < gf2k_pads[gf2k->id]; i++)
199 input_report_key(dev, gf2k_btn_pad[i], (t >> i) & 1);
200
201 input_sync(dev);
202 }
203
204 /*
205 * gf2k_timer() reads and analyzes Genius joystick data.
206 */
207
208 static void gf2k_timer(unsigned long private)
209 {
210 struct gf2k *gf2k = (void *) private;
211 unsigned char data[GF2K_LENGTH];
212
213 gf2k->reads++;
214
215 if (gf2k_read_packet(gf2k->gameport, gf2k_length[gf2k->id], data) < gf2k_length[gf2k->id]) {
216 gf2k->bads++;
217 } else gf2k_read(gf2k, data);
218
219 mod_timer(&gf2k->timer, jiffies + GF2K_REFRESH);
220 }
221
222 static int gf2k_open(struct input_dev *dev)
223 {
224 struct gf2k *gf2k = dev->private;
225 if (!gf2k->used++)
226 mod_timer(&gf2k->timer, jiffies + GF2K_REFRESH);
227 return 0;
228 }
229
230 static void gf2k_close(struct input_dev *dev)
231 {
232 struct gf2k *gf2k = dev->private;
233 if (!--gf2k->used)
234 del_timer(&gf2k->timer);
235 }
236
237 /*
238 * gf2k_connect() probes for Genius id joysticks.
239 */
240
241 static void gf2k_connect(struct gameport *gameport, struct gameport_dev *dev)
242 {
243 struct gf2k *gf2k;
244 unsigned char data[GF2K_LENGTH];
245 int i;
246
247 if (!(gf2k = kmalloc(sizeof(struct gf2k), GFP_KERNEL)))
248 return;
249 memset(gf2k, 0, sizeof(struct gf2k));
250
251 gameport->private = gf2k;
252
253 gf2k->gameport = gameport;
254 init_timer(&gf2k->timer);
255 gf2k->timer.data = (long) gf2k;
256 gf2k->timer.function = gf2k_timer;
257
258 if (gameport_open(gameport, dev, GAMEPORT_MODE_RAW))
259 goto fail1;
260
261 gf2k_trigger_seq(gameport, gf2k_seq_reset);
262
263 msleep(GF2K_TIMEOUT);
264
265 gf2k_trigger_seq(gameport, gf2k_seq_digital);
266
267 msleep(GF2K_TIMEOUT);
268
269 if (gf2k_read_packet(gameport, GF2K_LENGTH, data) < 12)
270 goto fail2;
271
272 if (!(gf2k->id = GB(7,2,0) | GB(3,3,2) | GB(0,3,5)))
273 goto fail2;
274
275 #ifdef RESET_WORKS
276 if ((gf2k->id != (GB(19,2,0) | GB(15,3,2) | GB(12,3,5))) ||
277 (gf2k->id != (GB(31,2,0) | GB(27,3,2) | GB(24,3,5))))
278 goto fail2;
279 #else
280 gf2k->id = 6;
281 #endif
282
283 if (gf2k->id > GF2K_ID_MAX || !gf2k_axes[gf2k->id]) {
284 printk(KERN_WARNING "gf2k.c: Not yet supported joystick on %s. [id: %d type:%s]\n",
285 gameport->phys, gf2k->id, gf2k->id > GF2K_ID_MAX ? "Unknown" : gf2k_names[gf2k->id]);
286 goto fail2;
287 }
288
289 sprintf(gf2k->phys, "%s/input0", gameport->phys);
290
291 gf2k->length = gf2k_lens[gf2k->id];
292
293 init_input_dev(&gf2k->dev);
294
295 gf2k->dev.private = gf2k;
296 gf2k->dev.open = gf2k_open;
297 gf2k->dev.close = gf2k_close;
298 gf2k->dev.evbit[0] = BIT(EV_KEY) | BIT(EV_ABS);
299
300 gf2k->dev.name = gf2k_names[gf2k->id];
301 gf2k->dev.phys = gf2k->phys;
302 gf2k->dev.id.bustype = BUS_GAMEPORT;
303 gf2k->dev.id.vendor = GAMEPORT_ID_VENDOR_GENIUS;
304 gf2k->dev.id.product = gf2k->id;
305 gf2k->dev.id.version = 0x0100;
306
307 for (i = 0; i < gf2k_axes[gf2k->id]; i++)
308 set_bit(gf2k_abs[i], gf2k->dev.absbit);
309
310 for (i = 0; i < gf2k_hats[gf2k->id]; i++) {
311 set_bit(ABS_HAT0X + i, gf2k->dev.absbit);
312 gf2k->dev.absmin[ABS_HAT0X + i] = -1;
313 gf2k->dev.absmax[ABS_HAT0X + i] = 1;
314 }
315
316 for (i = 0; i < gf2k_joys[gf2k->id]; i++)
317 set_bit(gf2k_btn_joy[i], gf2k->dev.keybit);
318
319 for (i = 0; i < gf2k_pads[gf2k->id]; i++)
320 set_bit(gf2k_btn_pad[i], gf2k->dev.keybit);
321
322 gf2k_read_packet(gameport, gf2k->length, data);
323 gf2k_read(gf2k, data);
324
325 for (i = 0; i < gf2k_axes[gf2k->id]; i++) {
326 gf2k->dev.absmax[gf2k_abs[i]] = (i < 2) ? gf2k->dev.abs[gf2k_abs[i]] * 2 - 32 :
327 gf2k->dev.abs[gf2k_abs[0]] + gf2k->dev.abs[gf2k_abs[1]] - 32;
328 gf2k->dev.absmin[gf2k_abs[i]] = 32;
329 gf2k->dev.absfuzz[gf2k_abs[i]] = 8;
330 gf2k->dev.absflat[gf2k_abs[i]] = (i < 2) ? 24 : 0;
331 }
332
333 input_register_device(&gf2k->dev);
334 printk(KERN_INFO "input: %s on %s\n", gf2k_names[gf2k->id], gameport->phys);
335
336 return;
337 fail2: gameport_close(gameport);
338 fail1: kfree(gf2k);
339 }
340
341 static void gf2k_disconnect(struct gameport *gameport)
342 {
343 struct gf2k *gf2k = gameport->private;
344 input_unregister_device(&gf2k->dev);
345 gameport_close(gameport);
346 kfree(gf2k);
347 }
348
349 static struct gameport_dev gf2k_dev = {
350 .connect = gf2k_connect,
351 .disconnect = gf2k_disconnect,
352 };
353
354 int __init gf2k_init(void)
355 {
356 gameport_register_device(&gf2k_dev);
357 return 0;
358 }
359
360 void __exit gf2k_exit(void)
361 {
362 gameport_unregister_device(&gf2k_dev);
363 }
364
365 module_init(gf2k_init);
366 module_exit(gf2k_exit);
367
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