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1da177e4 LT |
1 | /* |
2 | * Copyright (c) 1998-2005 Vojtech Pavlik | |
3 | */ | |
4 | ||
5 | /* | |
6 | * Microsoft SideWinder joystick family 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/delay.h> | |
30 | #include <linux/kernel.h> | |
31 | #include <linux/module.h> | |
32 | #include <linux/slab.h> | |
1da177e4 LT |
33 | #include <linux/input.h> |
34 | #include <linux/gameport.h> | |
4e57b681 | 35 | #include <linux/jiffies.h> |
1da177e4 LT |
36 | |
37 | #define DRIVER_DESC "Microsoft SideWinder joystick family driver" | |
38 | ||
39 | MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>"); | |
40 | MODULE_DESCRIPTION(DRIVER_DESC); | |
41 | MODULE_LICENSE("GPL"); | |
42 | ||
43 | /* | |
44 | * These are really magic values. Changing them can make a problem go away, | |
45 | * as well as break everything. | |
46 | */ | |
47 | ||
48 | #undef SW_DEBUG | |
49 | #undef SW_DEBUG_DATA | |
50 | ||
51 | #define SW_START 600 /* The time we wait for the first bit [600 us] */ | |
52 | #define SW_STROBE 60 /* Max time per bit [60 us] */ | |
53 | #define SW_TIMEOUT 6 /* Wait for everything to settle [6 ms] */ | |
54 | #define SW_KICK 45 /* Wait after A0 fall till kick [45 us] */ | |
55 | #define SW_END 8 /* Number of bits before end of packet to kick */ | |
56 | #define SW_FAIL 16 /* Number of packet read errors to fail and reinitialize */ | |
57 | #define SW_BAD 2 /* Number of packet read errors to switch off 3d Pro optimization */ | |
58 | #define SW_OK 64 /* Number of packet read successes to switch optimization back on */ | |
59 | #define SW_LENGTH 512 /* Max number of bits in a packet */ | |
60 | ||
61 | #ifdef SW_DEBUG | |
62 | #define dbg(format, arg...) printk(KERN_DEBUG __FILE__ ": " format "\n" , ## arg) | |
63 | #else | |
64 | #define dbg(format, arg...) do {} while (0) | |
65 | #endif | |
66 | ||
67 | /* | |
68 | * SideWinder joystick types ... | |
69 | */ | |
70 | ||
71 | #define SW_ID_3DP 0 | |
72 | #define SW_ID_GP 1 | |
73 | #define SW_ID_PP 2 | |
74 | #define SW_ID_FFP 3 | |
75 | #define SW_ID_FSP 4 | |
76 | #define SW_ID_FFW 5 | |
77 | ||
78 | /* | |
79 | * Names, buttons, axes ... | |
80 | */ | |
81 | ||
82 | static char *sw_name[] = { "3D Pro", "GamePad", "Precision Pro", "Force Feedback Pro", "FreeStyle Pro", | |
83 | "Force Feedback Wheel" }; | |
84 | ||
85 | static char sw_abs[][7] = { | |
86 | { ABS_X, ABS_Y, ABS_RZ, ABS_THROTTLE, ABS_HAT0X, ABS_HAT0Y }, | |
87 | { ABS_X, ABS_Y }, | |
88 | { ABS_X, ABS_Y, ABS_RZ, ABS_THROTTLE, ABS_HAT0X, ABS_HAT0Y }, | |
89 | { ABS_X, ABS_Y, ABS_RZ, ABS_THROTTLE, ABS_HAT0X, ABS_HAT0Y }, | |
90 | { ABS_X, ABS_Y, ABS_THROTTLE, ABS_HAT0X, ABS_HAT0Y }, | |
91 | { ABS_RX, ABS_RUDDER, ABS_THROTTLE }}; | |
92 | ||
93 | static char sw_bit[][7] = { | |
94 | { 10, 10, 9, 10, 1, 1 }, | |
95 | { 1, 1 }, | |
96 | { 10, 10, 6, 7, 1, 1 }, | |
97 | { 10, 10, 6, 7, 1, 1 }, | |
98 | { 10, 10, 6, 1, 1 }, | |
99 | { 10, 7, 7, 1, 1 }}; | |
100 | ||
101 | static short sw_btn[][12] = { | |
102 | { BTN_TRIGGER, BTN_TOP, BTN_THUMB, BTN_THUMB2, BTN_BASE, BTN_BASE2, BTN_BASE3, BTN_BASE4, BTN_MODE }, | |
103 | { BTN_A, BTN_B, BTN_C, BTN_X, BTN_Y, BTN_Z, BTN_TL, BTN_TR, BTN_START, BTN_MODE }, | |
104 | { BTN_TRIGGER, BTN_THUMB, BTN_TOP, BTN_TOP2, BTN_BASE, BTN_BASE2, BTN_BASE3, BTN_BASE4, BTN_SELECT }, | |
105 | { BTN_TRIGGER, BTN_THUMB, BTN_TOP, BTN_TOP2, BTN_BASE, BTN_BASE2, BTN_BASE3, BTN_BASE4, BTN_SELECT }, | |
106 | { BTN_A, BTN_B, BTN_C, BTN_X, BTN_Y, BTN_Z, BTN_TL, BTN_TR, BTN_START, BTN_MODE, BTN_SELECT }, | |
107 | { BTN_TRIGGER, BTN_TOP, BTN_THUMB, BTN_THUMB2, BTN_BASE, BTN_BASE2, BTN_BASE3, BTN_BASE4 }}; | |
108 | ||
109 | static struct { | |
110 | int x; | |
111 | int y; | |
112 | } sw_hat_to_axis[] = {{ 0, 0}, { 0,-1}, { 1,-1}, { 1, 0}, { 1, 1}, { 0, 1}, {-1, 1}, {-1, 0}, {-1,-1}}; | |
113 | ||
114 | struct sw { | |
115 | struct gameport *gameport; | |
17dd3f0f | 116 | struct input_dev *dev[4]; |
1da177e4 LT |
117 | char name[64]; |
118 | char phys[4][32]; | |
119 | int length; | |
120 | int type; | |
121 | int bits; | |
122 | int number; | |
123 | int fail; | |
124 | int ok; | |
125 | int reads; | |
126 | int bads; | |
127 | }; | |
128 | ||
129 | /* | |
130 | * sw_read_packet() is a function which reads either a data packet, or an | |
131 | * identification packet from a SideWinder joystick. The protocol is very, | |
132 | * very, very braindamaged. Microsoft patented it in US patent #5628686. | |
133 | */ | |
134 | ||
135 | static int sw_read_packet(struct gameport *gameport, unsigned char *buf, int length, int id) | |
136 | { | |
137 | unsigned long flags; | |
138 | int timeout, bitout, sched, i, kick, start, strobe; | |
139 | unsigned char pending, u, v; | |
140 | ||
141 | i = -id; /* Don't care about data, only want ID */ | |
142 | timeout = id ? gameport_time(gameport, SW_TIMEOUT * 1000) : 0; /* Set up global timeout for ID packet */ | |
143 | kick = id ? gameport_time(gameport, SW_KICK) : 0; /* Set up kick timeout for ID packet */ | |
144 | start = gameport_time(gameport, SW_START); | |
145 | strobe = gameport_time(gameport, SW_STROBE); | |
146 | bitout = start; | |
147 | pending = 0; | |
148 | sched = 0; | |
149 | ||
150 | local_irq_save(flags); /* Quiet, please */ | |
151 | ||
152 | gameport_trigger(gameport); /* Trigger */ | |
153 | v = gameport_read(gameport); | |
154 | ||
155 | do { | |
156 | bitout--; | |
157 | u = v; | |
158 | v = gameport_read(gameport); | |
159 | } while (!(~v & u & 0x10) && (bitout > 0)); /* Wait for first falling edge on clock */ | |
160 | ||
161 | if (bitout > 0) | |
162 | bitout = strobe; /* Extend time if not timed out */ | |
163 | ||
164 | while ((timeout > 0 || bitout > 0) && (i < length)) { | |
165 | ||
166 | timeout--; | |
167 | bitout--; /* Decrement timers */ | |
168 | sched--; | |
169 | ||
170 | u = v; | |
171 | v = gameport_read(gameport); | |
172 | ||
173 | if ((~u & v & 0x10) && (bitout > 0)) { /* Rising edge on clock - data bit */ | |
174 | if (i >= 0) /* Want this data */ | |
175 | buf[i] = v >> 5; /* Store it */ | |
176 | i++; /* Advance index */ | |
177 | bitout = strobe; /* Extend timeout for next bit */ | |
178 | } | |
179 | ||
180 | if (kick && (~v & u & 0x01)) { /* Falling edge on axis 0 */ | |
181 | sched = kick; /* Schedule second trigger */ | |
182 | kick = 0; /* Don't schedule next time on falling edge */ | |
183 | pending = 1; /* Mark schedule */ | |
184 | } | |
185 | ||
186 | if (pending && sched < 0 && (i > -SW_END)) { /* Second trigger time */ | |
187 | gameport_trigger(gameport); /* Trigger */ | |
188 | bitout = start; /* Long bit timeout */ | |
189 | pending = 0; /* Unmark schedule */ | |
190 | timeout = 0; /* Switch from global to bit timeouts */ | |
191 | } | |
192 | } | |
193 | ||
194 | local_irq_restore(flags); /* Done - relax */ | |
195 | ||
196 | #ifdef SW_DEBUG_DATA | |
197 | { | |
198 | int j; | |
199 | printk(KERN_DEBUG "sidewinder.c: Read %d triplets. [", i); | |
200 | for (j = 0; j < i; j++) printk("%d", buf[j]); | |
201 | printk("]\n"); | |
202 | } | |
203 | #endif | |
204 | ||
205 | return i; | |
206 | } | |
207 | ||
208 | /* | |
209 | * sw_get_bits() and GB() compose bits from the triplet buffer into a __u64. | |
210 | * Parameter 'pos' is bit number inside packet where to start at, 'num' is number | |
211 | * of bits to be read, 'shift' is offset in the resulting __u64 to start at, bits | |
212 | * is number of bits per triplet. | |
213 | */ | |
214 | ||
215 | #define GB(pos,num) sw_get_bits(buf, pos, num, sw->bits) | |
216 | ||
217 | static __u64 sw_get_bits(unsigned char *buf, int pos, int num, char bits) | |
218 | { | |
219 | __u64 data = 0; | |
220 | int tri = pos % bits; /* Start position */ | |
221 | int i = pos / bits; | |
222 | int bit = 0; | |
223 | ||
224 | while (num--) { | |
225 | data |= (__u64)((buf[i] >> tri++) & 1) << bit++; /* Transfer bit */ | |
226 | if (tri == bits) { | |
227 | i++; /* Next triplet */ | |
228 | tri = 0; | |
229 | } | |
230 | } | |
231 | ||
232 | return data; | |
233 | } | |
234 | ||
235 | /* | |
236 | * sw_init_digital() initializes a SideWinder 3D Pro joystick | |
237 | * into digital mode. | |
238 | */ | |
239 | ||
240 | static void sw_init_digital(struct gameport *gameport) | |
241 | { | |
242 | int seq[] = { 140, 140+725, 140+300, 0 }; | |
243 | unsigned long flags; | |
244 | int i, t; | |
245 | ||
246 | local_irq_save(flags); | |
247 | ||
248 | i = 0; | |
249 | do { | |
250 | gameport_trigger(gameport); /* Trigger */ | |
251 | t = gameport_time(gameport, SW_TIMEOUT * 1000); | |
252 | while ((gameport_read(gameport) & 1) && t) t--; /* Wait for axis to fall back to 0 */ | |
253 | udelay(seq[i]); /* Delay magic time */ | |
254 | } while (seq[++i]); | |
255 | ||
256 | gameport_trigger(gameport); /* Last trigger */ | |
257 | ||
258 | local_irq_restore(flags); | |
259 | } | |
260 | ||
261 | /* | |
262 | * sw_parity() computes parity of __u64 | |
263 | */ | |
264 | ||
265 | static int sw_parity(__u64 t) | |
266 | { | |
267 | int x = t ^ (t >> 32); | |
268 | ||
269 | x ^= x >> 16; | |
270 | x ^= x >> 8; | |
271 | x ^= x >> 4; | |
272 | x ^= x >> 2; | |
273 | x ^= x >> 1; | |
274 | return x & 1; | |
275 | } | |
276 | ||
277 | /* | |
278 | * sw_ccheck() checks synchronization bits and computes checksum of nibbles. | |
279 | */ | |
280 | ||
281 | static int sw_check(__u64 t) | |
282 | { | |
283 | unsigned char sum = 0; | |
284 | ||
285 | if ((t & 0x8080808080808080ULL) ^ 0x80) /* Sync */ | |
286 | return -1; | |
287 | ||
288 | while (t) { /* Sum */ | |
289 | sum += t & 0xf; | |
290 | t >>= 4; | |
291 | } | |
292 | ||
293 | return sum & 0xf; | |
294 | } | |
295 | ||
296 | /* | |
297 | * sw_parse() analyzes SideWinder joystick data, and writes the results into | |
298 | * the axes and buttons arrays. | |
299 | */ | |
300 | ||
301 | static int sw_parse(unsigned char *buf, struct sw *sw) | |
302 | { | |
303 | int hat, i, j; | |
17dd3f0f | 304 | struct input_dev *dev; |
1da177e4 LT |
305 | |
306 | switch (sw->type) { | |
307 | ||
308 | case SW_ID_3DP: | |
309 | ||
310 | if (sw_check(GB(0,64)) || (hat = (GB(6,1) << 3) | GB(60,3)) > 8) | |
311 | return -1; | |
312 | ||
17dd3f0f DT |
313 | dev = sw->dev[0]; |
314 | ||
1da177e4 LT |
315 | input_report_abs(dev, ABS_X, (GB( 3,3) << 7) | GB(16,7)); |
316 | input_report_abs(dev, ABS_Y, (GB( 0,3) << 7) | GB(24,7)); | |
317 | input_report_abs(dev, ABS_RZ, (GB(35,2) << 7) | GB(40,7)); | |
318 | input_report_abs(dev, ABS_THROTTLE, (GB(32,3) << 7) | GB(48,7)); | |
319 | ||
320 | input_report_abs(dev, ABS_HAT0X, sw_hat_to_axis[hat].x); | |
321 | input_report_abs(dev, ABS_HAT0Y, sw_hat_to_axis[hat].y); | |
322 | ||
323 | for (j = 0; j < 7; j++) | |
324 | input_report_key(dev, sw_btn[SW_ID_3DP][j], !GB(j+8,1)); | |
325 | ||
326 | input_report_key(dev, BTN_BASE4, !GB(38,1)); | |
327 | input_report_key(dev, BTN_BASE5, !GB(37,1)); | |
328 | ||
329 | input_sync(dev); | |
330 | ||
331 | return 0; | |
332 | ||
333 | case SW_ID_GP: | |
334 | ||
335 | for (i = 0; i < sw->number; i ++) { | |
336 | ||
337 | if (sw_parity(GB(i*15,15))) | |
338 | return -1; | |
339 | ||
17dd3f0f DT |
340 | input_report_abs(sw->dev[i], ABS_X, GB(i*15+3,1) - GB(i*15+2,1)); |
341 | input_report_abs(sw->dev[i], ABS_Y, GB(i*15+0,1) - GB(i*15+1,1)); | |
1da177e4 LT |
342 | |
343 | for (j = 0; j < 10; j++) | |
17dd3f0f | 344 | input_report_key(sw->dev[i], sw_btn[SW_ID_GP][j], !GB(i*15+j+4,1)); |
1da177e4 | 345 | |
17dd3f0f | 346 | input_sync(sw->dev[i]); |
1da177e4 LT |
347 | } |
348 | ||
349 | return 0; | |
350 | ||
351 | case SW_ID_PP: | |
352 | case SW_ID_FFP: | |
353 | ||
354 | if (!sw_parity(GB(0,48)) || (hat = GB(42,4)) > 8) | |
355 | return -1; | |
356 | ||
17dd3f0f | 357 | dev = sw->dev[0]; |
1da177e4 LT |
358 | input_report_abs(dev, ABS_X, GB( 9,10)); |
359 | input_report_abs(dev, ABS_Y, GB(19,10)); | |
360 | input_report_abs(dev, ABS_RZ, GB(36, 6)); | |
361 | input_report_abs(dev, ABS_THROTTLE, GB(29, 7)); | |
362 | ||
363 | input_report_abs(dev, ABS_HAT0X, sw_hat_to_axis[hat].x); | |
364 | input_report_abs(dev, ABS_HAT0Y, sw_hat_to_axis[hat].y); | |
365 | ||
366 | for (j = 0; j < 9; j++) | |
367 | input_report_key(dev, sw_btn[SW_ID_PP][j], !GB(j,1)); | |
368 | ||
369 | input_sync(dev); | |
370 | ||
371 | return 0; | |
372 | ||
373 | case SW_ID_FSP: | |
374 | ||
375 | if (!sw_parity(GB(0,43)) || (hat = GB(28,4)) > 8) | |
376 | return -1; | |
377 | ||
17dd3f0f | 378 | dev = sw->dev[0]; |
1da177e4 LT |
379 | input_report_abs(dev, ABS_X, GB( 0,10)); |
380 | input_report_abs(dev, ABS_Y, GB(16,10)); | |
381 | input_report_abs(dev, ABS_THROTTLE, GB(32, 6)); | |
382 | ||
383 | input_report_abs(dev, ABS_HAT0X, sw_hat_to_axis[hat].x); | |
384 | input_report_abs(dev, ABS_HAT0Y, sw_hat_to_axis[hat].y); | |
385 | ||
386 | for (j = 0; j < 6; j++) | |
387 | input_report_key(dev, sw_btn[SW_ID_FSP][j], !GB(j+10,1)); | |
388 | ||
389 | input_report_key(dev, BTN_TR, !GB(26,1)); | |
390 | input_report_key(dev, BTN_START, !GB(27,1)); | |
391 | input_report_key(dev, BTN_MODE, !GB(38,1)); | |
392 | input_report_key(dev, BTN_SELECT, !GB(39,1)); | |
393 | ||
394 | input_sync(dev); | |
395 | ||
396 | return 0; | |
397 | ||
398 | case SW_ID_FFW: | |
399 | ||
400 | if (!sw_parity(GB(0,33))) | |
401 | return -1; | |
402 | ||
17dd3f0f | 403 | dev = sw->dev[0]; |
1da177e4 LT |
404 | input_report_abs(dev, ABS_RX, GB( 0,10)); |
405 | input_report_abs(dev, ABS_RUDDER, GB(10, 6)); | |
406 | input_report_abs(dev, ABS_THROTTLE, GB(16, 6)); | |
407 | ||
408 | for (j = 0; j < 8; j++) | |
409 | input_report_key(dev, sw_btn[SW_ID_FFW][j], !GB(j+22,1)); | |
410 | ||
411 | input_sync(dev); | |
412 | ||
413 | return 0; | |
414 | } | |
415 | ||
416 | return -1; | |
417 | } | |
418 | ||
419 | /* | |
420 | * sw_read() reads SideWinder joystick data, and reinitializes | |
421 | * the joystick in case of persistent problems. This is the function that is | |
422 | * called from the generic code to poll the joystick. | |
423 | */ | |
424 | ||
425 | static int sw_read(struct sw *sw) | |
426 | { | |
427 | unsigned char buf[SW_LENGTH]; | |
428 | int i; | |
429 | ||
430 | i = sw_read_packet(sw->gameport, buf, sw->length, 0); | |
431 | ||
432 | if (sw->type == SW_ID_3DP && sw->length == 66 && i != 66) { /* Broken packet, try to fix */ | |
433 | ||
434 | if (i == 64 && !sw_check(sw_get_bits(buf,0,64,1))) { /* Last init failed, 1 bit mode */ | |
435 | printk(KERN_WARNING "sidewinder.c: Joystick in wrong mode on %s" | |
436 | " - going to reinitialize.\n", sw->gameport->phys); | |
437 | sw->fail = SW_FAIL; /* Reinitialize */ | |
438 | i = 128; /* Bogus value */ | |
439 | } | |
440 | ||
441 | if (i < 66 && GB(0,64) == GB(i*3-66,64)) /* 1 == 3 */ | |
442 | i = 66; /* Everything is fine */ | |
443 | ||
444 | if (i < 66 && GB(0,64) == GB(66,64)) /* 1 == 2 */ | |
445 | i = 66; /* Everything is fine */ | |
446 | ||
447 | if (i < 66 && GB(i*3-132,64) == GB(i*3-66,64)) { /* 2 == 3 */ | |
448 | memmove(buf, buf + i - 22, 22); /* Move data */ | |
449 | i = 66; /* Carry on */ | |
450 | } | |
451 | } | |
452 | ||
453 | if (i == sw->length && !sw_parse(buf, sw)) { /* Parse data */ | |
454 | ||
455 | sw->fail = 0; | |
456 | sw->ok++; | |
457 | ||
458 | if (sw->type == SW_ID_3DP && sw->length == 66 /* Many packets OK */ | |
459 | && sw->ok > SW_OK) { | |
460 | ||
461 | printk(KERN_INFO "sidewinder.c: No more trouble on %s" | |
462 | " - enabling optimization again.\n", sw->gameport->phys); | |
463 | sw->length = 22; | |
464 | } | |
465 | ||
466 | return 0; | |
467 | } | |
468 | ||
469 | sw->ok = 0; | |
470 | sw->fail++; | |
471 | ||
472 | if (sw->type == SW_ID_3DP && sw->length == 22 && sw->fail > SW_BAD) { /* Consecutive bad packets */ | |
473 | ||
474 | printk(KERN_INFO "sidewinder.c: Many bit errors on %s" | |
475 | " - disabling optimization.\n", sw->gameport->phys); | |
476 | sw->length = 66; | |
477 | } | |
478 | ||
479 | if (sw->fail < SW_FAIL) | |
480 | return -1; /* Not enough, don't reinitialize yet */ | |
481 | ||
482 | printk(KERN_WARNING "sidewinder.c: Too many bit errors on %s" | |
483 | " - reinitializing joystick.\n", sw->gameport->phys); | |
484 | ||
485 | if (!i && sw->type == SW_ID_3DP) { /* 3D Pro can be in analog mode */ | |
486 | mdelay(3 * SW_TIMEOUT); | |
487 | sw_init_digital(sw->gameport); | |
488 | } | |
489 | ||
490 | mdelay(SW_TIMEOUT); | |
491 | i = sw_read_packet(sw->gameport, buf, SW_LENGTH, 0); /* Read normal data packet */ | |
492 | mdelay(SW_TIMEOUT); | |
493 | sw_read_packet(sw->gameport, buf, SW_LENGTH, i); /* Read ID packet, this initializes the stick */ | |
494 | ||
495 | sw->fail = SW_FAIL; | |
496 | ||
497 | return -1; | |
498 | } | |
499 | ||
500 | static void sw_poll(struct gameport *gameport) | |
501 | { | |
502 | struct sw *sw = gameport_get_drvdata(gameport); | |
503 | ||
504 | sw->reads++; | |
505 | if (sw_read(sw)) | |
506 | sw->bads++; | |
507 | } | |
508 | ||
509 | static int sw_open(struct input_dev *dev) | |
510 | { | |
8715c1cf | 511 | struct sw *sw = input_get_drvdata(dev); |
1da177e4 LT |
512 | |
513 | gameport_start_polling(sw->gameport); | |
514 | return 0; | |
515 | } | |
516 | ||
517 | static void sw_close(struct input_dev *dev) | |
518 | { | |
8715c1cf | 519 | struct sw *sw = input_get_drvdata(dev); |
1da177e4 LT |
520 | |
521 | gameport_stop_polling(sw->gameport); | |
522 | } | |
523 | ||
524 | /* | |
525 | * sw_print_packet() prints the contents of a SideWinder packet. | |
526 | */ | |
527 | ||
528 | static void sw_print_packet(char *name, int length, unsigned char *buf, char bits) | |
529 | { | |
530 | int i; | |
531 | ||
532 | printk(KERN_INFO "sidewinder.c: %s packet, %d bits. [", name, length); | |
533 | for (i = (((length + 3) >> 2) - 1); i >= 0; i--) | |
534 | printk("%x", (int)sw_get_bits(buf, i << 2, 4, bits)); | |
535 | printk("]\n"); | |
536 | } | |
537 | ||
538 | /* | |
539 | * sw_3dp_id() translates the 3DP id into a human legible string. | |
540 | * Unfortunately I don't know how to do this for the other SW types. | |
541 | */ | |
542 | ||
10ca4c0a | 543 | static void sw_3dp_id(unsigned char *buf, char *comment, size_t size) |
1da177e4 LT |
544 | { |
545 | int i; | |
546 | char pnp[8], rev[9]; | |
547 | ||
548 | for (i = 0; i < 7; i++) /* ASCII PnP ID */ | |
549 | pnp[i] = sw_get_bits(buf, 24+8*i, 8, 1); | |
550 | ||
551 | for (i = 0; i < 8; i++) /* ASCII firmware revision */ | |
552 | rev[i] = sw_get_bits(buf, 88+8*i, 8, 1); | |
553 | ||
554 | pnp[7] = rev[8] = 0; | |
555 | ||
10ca4c0a | 556 | snprintf(comment, size, " [PnP %d.%02d id %s rev %s]", |
1da177e4 LT |
557 | (int) ((sw_get_bits(buf, 8, 6, 1) << 6) | /* Two 6-bit values */ |
558 | sw_get_bits(buf, 16, 6, 1)) / 100, | |
559 | (int) ((sw_get_bits(buf, 8, 6, 1) << 6) | | |
560 | sw_get_bits(buf, 16, 6, 1)) % 100, | |
561 | pnp, rev); | |
562 | } | |
563 | ||
564 | /* | |
565 | * sw_guess_mode() checks the upper two button bits for toggling - | |
566 | * indication of that the joystick is in 3-bit mode. This is documented | |
567 | * behavior for 3DP ID packet, and for example the FSP does this in | |
568 | * normal packets instead. Fun ... | |
569 | */ | |
570 | ||
571 | static int sw_guess_mode(unsigned char *buf, int len) | |
572 | { | |
573 | int i; | |
574 | unsigned char xor = 0; | |
575 | ||
576 | for (i = 1; i < len; i++) | |
577 | xor |= (buf[i - 1] ^ buf[i]) & 6; | |
578 | ||
579 | return !!xor * 2 + 1; | |
580 | } | |
581 | ||
582 | /* | |
583 | * sw_connect() probes for SideWinder type joysticks. | |
584 | */ | |
585 | ||
586 | static int sw_connect(struct gameport *gameport, struct gameport_driver *drv) | |
587 | { | |
588 | struct sw *sw; | |
17dd3f0f | 589 | struct input_dev *input_dev; |
1da177e4 | 590 | int i, j, k, l; |
7363cfc8 | 591 | int err = 0; |
1da177e4 LT |
592 | unsigned char *buf = NULL; /* [SW_LENGTH] */ |
593 | unsigned char *idbuf = NULL; /* [SW_LENGTH] */ | |
594 | unsigned char m = 1; | |
595 | char comment[40]; | |
596 | ||
597 | comment[0] = 0; | |
598 | ||
a97e148a | 599 | sw = kzalloc(sizeof(struct sw), GFP_KERNEL); |
1da177e4 LT |
600 | buf = kmalloc(SW_LENGTH, GFP_KERNEL); |
601 | idbuf = kmalloc(SW_LENGTH, GFP_KERNEL); | |
602 | if (!sw || !buf || !idbuf) { | |
603 | err = -ENOMEM; | |
604 | goto fail1; | |
605 | } | |
606 | ||
607 | sw->gameport = gameport; | |
608 | ||
609 | gameport_set_drvdata(gameport, sw); | |
610 | ||
611 | err = gameport_open(gameport, drv, GAMEPORT_MODE_RAW); | |
612 | if (err) | |
613 | goto fail1; | |
614 | ||
615 | dbg("Init 0: Opened %s, io %#x, speed %d", | |
616 | gameport->phys, gameport->io, gameport->speed); | |
617 | ||
618 | i = sw_read_packet(gameport, buf, SW_LENGTH, 0); /* Read normal packet */ | |
619 | msleep(SW_TIMEOUT); | |
620 | dbg("Init 1: Mode %d. Length %d.", m , i); | |
621 | ||
622 | if (!i) { /* No data. 3d Pro analog mode? */ | |
623 | sw_init_digital(gameport); /* Switch to digital */ | |
624 | msleep(SW_TIMEOUT); | |
625 | i = sw_read_packet(gameport, buf, SW_LENGTH, 0); /* Retry reading packet */ | |
626 | msleep(SW_TIMEOUT); | |
627 | dbg("Init 1b: Length %d.", i); | |
628 | if (!i) { /* No data -> FAIL */ | |
629 | err = -ENODEV; | |
630 | goto fail2; | |
631 | } | |
632 | } | |
633 | ||
634 | j = sw_read_packet(gameport, idbuf, SW_LENGTH, i); /* Read ID. This initializes the stick */ | |
635 | m |= sw_guess_mode(idbuf, j); /* ID packet should carry mode info [3DP] */ | |
636 | dbg("Init 2: Mode %d. ID Length %d.", m, j); | |
637 | ||
638 | if (j <= 0) { /* Read ID failed. Happens in 1-bit mode on PP */ | |
639 | msleep(SW_TIMEOUT); | |
640 | i = sw_read_packet(gameport, buf, SW_LENGTH, 0); /* Retry reading packet */ | |
641 | m |= sw_guess_mode(buf, i); | |
642 | dbg("Init 2b: Mode %d. Length %d.", m, i); | |
643 | if (!i) { | |
644 | err = -ENODEV; | |
645 | goto fail2; | |
646 | } | |
647 | msleep(SW_TIMEOUT); | |
648 | j = sw_read_packet(gameport, idbuf, SW_LENGTH, i); /* Retry reading ID */ | |
649 | dbg("Init 2c: ID Length %d.", j); | |
650 | } | |
651 | ||
652 | sw->type = -1; | |
653 | k = SW_FAIL; /* Try SW_FAIL times */ | |
654 | l = 0; | |
655 | ||
656 | do { | |
657 | k--; | |
658 | msleep(SW_TIMEOUT); | |
659 | i = sw_read_packet(gameport, buf, SW_LENGTH, 0); /* Read data packet */ | |
660 | dbg("Init 3: Mode %d. Length %d. Last %d. Tries %d.", m, i, l, k); | |
661 | ||
662 | if (i > l) { /* Longer? As we can only lose bits, it makes */ | |
663 | /* no sense to try detection for a packet shorter */ | |
664 | l = i; /* than the previous one */ | |
665 | ||
666 | sw->number = 1; | |
667 | sw->gameport = gameport; | |
668 | sw->length = i; | |
669 | sw->bits = m; | |
670 | ||
671 | dbg("Init 3a: Case %d.\n", i * m); | |
672 | ||
673 | switch (i * m) { | |
674 | case 60: | |
675 | sw->number++; | |
676 | case 45: /* Ambiguous packet length */ | |
677 | if (j <= 40) { /* ID length less or eq 40 -> FSP */ | |
678 | case 43: | |
679 | sw->type = SW_ID_FSP; | |
680 | break; | |
681 | } | |
682 | sw->number++; | |
683 | case 30: | |
684 | sw->number++; | |
685 | case 15: | |
686 | sw->type = SW_ID_GP; | |
687 | break; | |
688 | case 33: | |
689 | case 31: | |
690 | sw->type = SW_ID_FFW; | |
691 | break; | |
692 | case 48: /* Ambiguous */ | |
693 | if (j == 14) { /* ID length 14*3 -> FFP */ | |
694 | sw->type = SW_ID_FFP; | |
695 | sprintf(comment, " [AC %s]", sw_get_bits(idbuf,38,1,3) ? "off" : "on"); | |
696 | } else | |
10ca4c0a | 697 | sw->type = SW_ID_PP; |
1da177e4 LT |
698 | break; |
699 | case 66: | |
700 | sw->bits = 3; | |
701 | case 198: | |
702 | sw->length = 22; | |
703 | case 64: | |
704 | sw->type = SW_ID_3DP; | |
10ca4c0a DT |
705 | if (j == 160) |
706 | sw_3dp_id(idbuf, comment, sizeof(comment)); | |
1da177e4 LT |
707 | break; |
708 | } | |
709 | } | |
710 | ||
711 | } while (k && sw->type == -1); | |
712 | ||
713 | if (sw->type == -1) { | |
714 | printk(KERN_WARNING "sidewinder.c: unknown joystick device detected " | |
715 | "on %s, contact <vojtech@ucw.cz>\n", gameport->phys); | |
716 | sw_print_packet("ID", j * 3, idbuf, 3); | |
717 | sw_print_packet("Data", i * m, buf, m); | |
718 | err = -ENODEV; | |
719 | goto fail2; | |
720 | } | |
721 | ||
722 | #ifdef SW_DEBUG | |
723 | sw_print_packet("ID", j * 3, idbuf, 3); | |
724 | sw_print_packet("Data", i * m, buf, m); | |
725 | #endif | |
726 | ||
727 | gameport_set_poll_handler(gameport, sw_poll); | |
728 | gameport_set_poll_interval(gameport, 20); | |
729 | ||
730 | k = i; | |
731 | l = j; | |
732 | ||
733 | for (i = 0; i < sw->number; i++) { | |
734 | int bits, code; | |
735 | ||
10ca4c0a DT |
736 | snprintf(sw->name, sizeof(sw->name), |
737 | "Microsoft SideWinder %s", sw_name[sw->type]); | |
738 | snprintf(sw->phys[i], sizeof(sw->phys[i]), | |
739 | "%s/input%d", gameport->phys, i); | |
1da177e4 | 740 | |
847fd5fb | 741 | sw->dev[i] = input_dev = input_allocate_device(); |
17dd3f0f DT |
742 | if (!input_dev) { |
743 | err = -ENOMEM; | |
744 | goto fail3; | |
745 | } | |
1da177e4 | 746 | |
17dd3f0f DT |
747 | input_dev->name = sw->name; |
748 | input_dev->phys = sw->phys[i]; | |
749 | input_dev->id.bustype = BUS_GAMEPORT; | |
750 | input_dev->id.vendor = GAMEPORT_ID_VENDOR_MICROSOFT; | |
751 | input_dev->id.product = sw->type; | |
752 | input_dev->id.version = 0x0100; | |
935e658e | 753 | input_dev->dev.parent = &gameport->dev; |
8715c1cf DT |
754 | |
755 | input_set_drvdata(input_dev, sw); | |
1da177e4 | 756 | |
17dd3f0f DT |
757 | input_dev->open = sw_open; |
758 | input_dev->close = sw_close; | |
1da177e4 | 759 | |
7b19ada2 | 760 | input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS); |
1da177e4 LT |
761 | |
762 | for (j = 0; (bits = sw_bit[sw->type][j]); j++) { | |
987a6c02 DM |
763 | int min, max, fuzz, flat; |
764 | ||
1da177e4 | 765 | code = sw_abs[sw->type][j]; |
987a6c02 DM |
766 | min = bits == 1 ? -1 : 0; |
767 | max = (1 << bits) - 1; | |
768 | fuzz = (bits >> 1) >= 2 ? 1 << ((bits >> 1) - 2) : 0; | |
769 | flat = code == ABS_THROTTLE || bits < 5 ? | |
770 | 0 : 1 << (bits - 5); | |
771 | ||
772 | input_set_abs_params(input_dev, code, | |
773 | min, max, fuzz, flat); | |
1da177e4 LT |
774 | } |
775 | ||
776 | for (j = 0; (code = sw_btn[sw->type][j]); j++) | |
987a6c02 | 777 | __set_bit(code, input_dev->keybit); |
17dd3f0f DT |
778 | |
779 | dbg("%s%s [%d-bit id %d data %d]\n", sw->name, comment, m, l, k); | |
1da177e4 | 780 | |
07cf779c DT |
781 | err = input_register_device(sw->dev[i]); |
782 | if (err) | |
783 | goto fail4; | |
1da177e4 LT |
784 | } |
785 | ||
7363cfc8 JJ |
786 | out: kfree(buf); |
787 | kfree(idbuf); | |
788 | ||
789 | return err; | |
1da177e4 | 790 | |
07cf779c DT |
791 | fail4: input_free_device(sw->dev[i]); |
792 | fail3: while (--i >= 0) | |
17dd3f0f DT |
793 | input_unregister_device(sw->dev[i]); |
794 | fail2: gameport_close(gameport); | |
795 | fail1: gameport_set_drvdata(gameport, NULL); | |
1da177e4 | 796 | kfree(sw); |
7363cfc8 | 797 | goto out; |
1da177e4 LT |
798 | } |
799 | ||
800 | static void sw_disconnect(struct gameport *gameport) | |
801 | { | |
802 | struct sw *sw = gameport_get_drvdata(gameport); | |
803 | int i; | |
804 | ||
805 | for (i = 0; i < sw->number; i++) | |
17dd3f0f | 806 | input_unregister_device(sw->dev[i]); |
1da177e4 LT |
807 | gameport_close(gameport); |
808 | gameport_set_drvdata(gameport, NULL); | |
809 | kfree(sw); | |
810 | } | |
811 | ||
812 | static struct gameport_driver sw_drv = { | |
813 | .driver = { | |
814 | .name = "sidewinder", | |
07cf779c | 815 | .owner = THIS_MODULE, |
1da177e4 LT |
816 | }, |
817 | .description = DRIVER_DESC, | |
818 | .connect = sw_connect, | |
819 | .disconnect = sw_disconnect, | |
820 | }; | |
821 | ||
98a84131 | 822 | module_gameport_driver(sw_drv); |