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treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156
[linux-block.git] / drivers / input / joystick / sidewinder.c
CommitLineData
1a59d1b8 1// SPDX-License-Identifier: GPL-2.0-or-later
1da177e4
LT		 2/*
3 * Copyright (c) 1998-2005 Vojtech Pavlik
4 */
5
6/*
7 * Microsoft SideWinder joystick family driver for Linux
8 */
9
10/*
1da177e4
LT		 11 */
12
13#include <linux/delay.h>
14#include <linux/kernel.h>
15#include <linux/module.h>
16#include <linux/slab.h>
1da177e4
LT		 17#include <linux/input.h>
18#include <linux/gameport.h>
4e57b681 19#include <linux/jiffies.h>
1da177e4
LT		 20
21#define DRIVER_DESC "Microsoft SideWinder joystick family driver"
22
23MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
24MODULE_DESCRIPTION(DRIVER_DESC);
25MODULE_LICENSE("GPL");
26
27/*
28 * These are really magic values. Changing them can make a problem go away,
29 * as well as break everything.
30 */
31
32#undef SW_DEBUG
33#undef SW_DEBUG_DATA
34
35#define SW_START 600 /* The time we wait for the first bit [600 us] */
36#define SW_STROBE 60 /* Max time per bit [60 us] */
37#define SW_TIMEOUT 6 /* Wait for everything to settle [6 ms] */
38#define SW_KICK 45 /* Wait after A0 fall till kick [45 us] */
39#define SW_END 8 /* Number of bits before end of packet to kick */
40#define SW_FAIL 16 /* Number of packet read errors to fail and reinitialize */
41#define SW_BAD 2 /* Number of packet read errors to switch off 3d Pro optimization */
42#define SW_OK 64 /* Number of packet read successes to switch optimization back on */
43#define SW_LENGTH 512 /* Max number of bits in a packet */
44
45#ifdef SW_DEBUG
46#define dbg(format, arg...) printk(KERN_DEBUG __FILE__ ": " format "\n" , ## arg)
47#else
48#define dbg(format, arg...) do {} while (0)
49#endif
50
51/*
52 * SideWinder joystick types ...
53 */
54
55#define SW_ID_3DP 0
56#define SW_ID_GP 1
57#define SW_ID_PP 2
58#define SW_ID_FFP 3
59#define SW_ID_FSP 4
60#define SW_ID_FFW 5
61
62/*
63 * Names, buttons, axes ...
64 */
65
66static char *sw_name[] = { "3D Pro", "GamePad", "Precision Pro", "Force Feedback Pro", "FreeStyle Pro",
67 "Force Feedback Wheel" };
68
69static char sw_abs[][7] = {
70 { ABS_X, ABS_Y, ABS_RZ, ABS_THROTTLE, ABS_HAT0X, ABS_HAT0Y },
71 { ABS_X, ABS_Y },
72 { ABS_X, ABS_Y, ABS_RZ, ABS_THROTTLE, ABS_HAT0X, ABS_HAT0Y },
73 { ABS_X, ABS_Y, ABS_RZ, ABS_THROTTLE, ABS_HAT0X, ABS_HAT0Y },
74 { ABS_X, ABS_Y, ABS_THROTTLE, ABS_HAT0X, ABS_HAT0Y },
75 { ABS_RX, ABS_RUDDER, ABS_THROTTLE }};
76
77static char sw_bit[][7] = {
78 { 10, 10, 9, 10, 1, 1 },
79 { 1, 1 },
80 { 10, 10, 6, 7, 1, 1 },
81 { 10, 10, 6, 7, 1, 1 },
82 { 10, 10, 6, 1, 1 },
83 { 10, 7, 7, 1, 1 }};
84
85static short sw_btn[][12] = {
86 { BTN_TRIGGER, BTN_TOP, BTN_THUMB, BTN_THUMB2, BTN_BASE, BTN_BASE2, BTN_BASE3, BTN_BASE4, BTN_MODE },
87 { BTN_A, BTN_B, BTN_C, BTN_X, BTN_Y, BTN_Z, BTN_TL, BTN_TR, BTN_START, BTN_MODE },
88 { BTN_TRIGGER, BTN_THUMB, BTN_TOP, BTN_TOP2, BTN_BASE, BTN_BASE2, BTN_BASE3, BTN_BASE4, BTN_SELECT },
89 { BTN_TRIGGER, BTN_THUMB, BTN_TOP, BTN_TOP2, BTN_BASE, BTN_BASE2, BTN_BASE3, BTN_BASE4, BTN_SELECT },
90 { BTN_A, BTN_B, BTN_C, BTN_X, BTN_Y, BTN_Z, BTN_TL, BTN_TR, BTN_START, BTN_MODE, BTN_SELECT },
91 { BTN_TRIGGER, BTN_TOP, BTN_THUMB, BTN_THUMB2, BTN_BASE, BTN_BASE2, BTN_BASE3, BTN_BASE4 }};
92
93static struct {
94 int x;
95 int y;
96} sw_hat_to_axis[] = {{ 0, 0}, { 0,-1}, { 1,-1}, { 1, 0}, { 1, 1}, { 0, 1}, {-1, 1}, {-1, 0}, {-1,-1}};
97
98struct sw {
99 struct gameport *gameport;
17dd3f0f 100 struct input_dev *dev[4];
1da177e4
LT		 101 char name[64];
102 char phys[4][32];
103 int length;
104 int type;
105 int bits;
106 int number;
107 int fail;
108 int ok;
109 int reads;
110 int bads;
111};
112
113/*
114 * sw_read_packet() is a function which reads either a data packet, or an
115 * identification packet from a SideWinder joystick. The protocol is very,
116 * very, very braindamaged. Microsoft patented it in US patent #5628686.
117 */
118
119static int sw_read_packet(struct gameport *gameport, unsigned char *buf, int length, int id)
120{
121 unsigned long flags;
122 int timeout, bitout, sched, i, kick, start, strobe;
123 unsigned char pending, u, v;
124
125 i = -id; /* Don't care about data, only want ID */
126 timeout = id ? gameport_time(gameport, SW_TIMEOUT * 1000) : 0; /* Set up global timeout for ID packet */
127 kick = id ? gameport_time(gameport, SW_KICK) : 0; /* Set up kick timeout for ID packet */
128 start = gameport_time(gameport, SW_START);
129 strobe = gameport_time(gameport, SW_STROBE);
130 bitout = start;
131 pending = 0;
132 sched = 0;
133
134 local_irq_save(flags); /* Quiet, please */
135
136 gameport_trigger(gameport); /* Trigger */
137 v = gameport_read(gameport);
138
139 do {
140 bitout--;
141 u = v;
142 v = gameport_read(gameport);
143 } while (!(~v & u & 0x10) && (bitout > 0)); /* Wait for first falling edge on clock */
144
145 if (bitout > 0)
146 bitout = strobe; /* Extend time if not timed out */
147
148 while ((timeout > 0 || bitout > 0) && (i < length)) {
149
150 timeout--;
151 bitout--; /* Decrement timers */
152 sched--;
153
154 u = v;
155 v = gameport_read(gameport);
156
157 if ((~u & v & 0x10) && (bitout > 0)) { /* Rising edge on clock - data bit */
158 if (i >= 0) /* Want this data */
159 buf[i] = v >> 5; /* Store it */
160 i++; /* Advance index */
161 bitout = strobe; /* Extend timeout for next bit */
162 }
163
164 if (kick && (~v & u & 0x01)) { /* Falling edge on axis 0 */
165 sched = kick; /* Schedule second trigger */
166 kick = 0; /* Don't schedule next time on falling edge */
167 pending = 1; /* Mark schedule */
168 }
169
170 if (pending && sched < 0 && (i > -SW_END)) { /* Second trigger time */
171 gameport_trigger(gameport); /* Trigger */
172 bitout = start; /* Long bit timeout */
173 pending = 0; /* Unmark schedule */
174 timeout = 0; /* Switch from global to bit timeouts */
175 }
176 }
177
178 local_irq_restore(flags); /* Done - relax */
179
180#ifdef SW_DEBUG_DATA
181 {
182 int j;
183 printk(KERN_DEBUG "sidewinder.c: Read %d triplets. [", i);
184 for (j = 0; j < i; j++) printk("%d", buf[j]);
185 printk("]\n");
186 }
187#endif
188
189 return i;
190}
191
192/*
193 * sw_get_bits() and GB() compose bits from the triplet buffer into a __u64.
194 * Parameter 'pos' is bit number inside packet where to start at, 'num' is number
195 * of bits to be read, 'shift' is offset in the resulting __u64 to start at, bits
196 * is number of bits per triplet.
197 */
198
199#define GB(pos,num) sw_get_bits(buf, pos, num, sw->bits)
200
201static __u64 sw_get_bits(unsigned char *buf, int pos, int num, char bits)
202{
203 __u64 data = 0;
204 int tri = pos % bits; /* Start position */
205 int i = pos / bits;
206 int bit = 0;
207
208 while (num--) {
209 data |= (__u64)((buf[i] >> tri++) & 1) << bit++; /* Transfer bit */
210 if (tri == bits) {
211 i++; /* Next triplet */
212 tri = 0;
213 }
214 }
215
216 return data;
217}
218
219/*
220 * sw_init_digital() initializes a SideWinder 3D Pro joystick
221 * into digital mode.
222 */
223
224static void sw_init_digital(struct gameport *gameport)
225{
226 int seq[] = { 140, 140+725, 140+300, 0 };
227 unsigned long flags;
228 int i, t;
229
230 local_irq_save(flags);
231
232 i = 0;
233 do {
234 gameport_trigger(gameport); /* Trigger */
235 t = gameport_time(gameport, SW_TIMEOUT * 1000);
236 while ((gameport_read(gameport) & 1) && t) t--; /* Wait for axis to fall back to 0 */
237 udelay(seq[i]); /* Delay magic time */
238 } while (seq[++i]);
239
240 gameport_trigger(gameport); /* Last trigger */
241
242 local_irq_restore(flags);
243}
244
245/*
246 * sw_parity() computes parity of __u64
247 */
248
249static int sw_parity(__u64 t)
250{
251 int x = t ^ (t >> 32);
252
253 x ^= x >> 16;
254 x ^= x >> 8;
255 x ^= x >> 4;
256 x ^= x >> 2;
257 x ^= x >> 1;
258 return x & 1;
259}
260
261/*
262 * sw_ccheck() checks synchronization bits and computes checksum of nibbles.
263 */
264
265static int sw_check(__u64 t)
266{
267 unsigned char sum = 0;
268
269 if ((t & 0x8080808080808080ULL) ^ 0x80) /* Sync */
270 return -1;
271
272 while (t) { /* Sum */
273 sum += t & 0xf;
274 t >>= 4;
275 }
276
277 return sum & 0xf;
278}
279
280/*
281 * sw_parse() analyzes SideWinder joystick data, and writes the results into
282 * the axes and buttons arrays.
283 */
284
285static int sw_parse(unsigned char *buf, struct sw *sw)
286{
287 int hat, i, j;
17dd3f0f 288 struct input_dev *dev;
1da177e4
LT		 289
290 switch (sw->type) {
291
292 case SW_ID_3DP:
293
294 if (sw_check(GB(0,64)) || (hat = (GB(6,1) << 3) | GB(60,3)) > 8)
295 return -1;
296
17dd3f0f
DT		 297 dev = sw->dev[0];
298
1da177e4
LT		 299 input_report_abs(dev, ABS_X, (GB( 3,3) << 7) | GB(16,7));
300 input_report_abs(dev, ABS_Y, (GB( 0,3) << 7) | GB(24,7));
301 input_report_abs(dev, ABS_RZ, (GB(35,2) << 7) | GB(40,7));
302 input_report_abs(dev, ABS_THROTTLE, (GB(32,3) << 7) | GB(48,7));
303
304 input_report_abs(dev, ABS_HAT0X, sw_hat_to_axis[hat].x);
305 input_report_abs(dev, ABS_HAT0Y, sw_hat_to_axis[hat].y);
306
307 for (j = 0; j < 7; j++)
308 input_report_key(dev, sw_btn[SW_ID_3DP][j], !GB(j+8,1));
309
310 input_report_key(dev, BTN_BASE4, !GB(38,1));
311 input_report_key(dev, BTN_BASE5, !GB(37,1));
312
313 input_sync(dev);
314
315 return 0;
316
317 case SW_ID_GP:
318
319 for (i = 0; i < sw->number; i ++) {
320
321 if (sw_parity(GB(i*15,15)))
322 return -1;
323
17dd3f0f
DT		 324 input_report_abs(sw->dev[i], ABS_X, GB(i*15+3,1) - GB(i*15+2,1));
325 input_report_abs(sw->dev[i], ABS_Y, GB(i*15+0,1) - GB(i*15+1,1));
1da177e4
LT		 326
327 for (j = 0; j < 10; j++)
17dd3f0f 328 input_report_key(sw->dev[i], sw_btn[SW_ID_GP][j], !GB(i*15+j+4,1));
1da177e4 329
17dd3f0f 330 input_sync(sw->dev[i]);
1da177e4
LT		 331 }
332
333 return 0;
334
335 case SW_ID_PP:
336 case SW_ID_FFP:
337
338 if (!sw_parity(GB(0,48)) || (hat = GB(42,4)) > 8)
339 return -1;
340
17dd3f0f 341 dev = sw->dev[0];
1da177e4
LT		 342 input_report_abs(dev, ABS_X, GB( 9,10));
343 input_report_abs(dev, ABS_Y, GB(19,10));
344 input_report_abs(dev, ABS_RZ, GB(36, 6));
345 input_report_abs(dev, ABS_THROTTLE, GB(29, 7));
346
347 input_report_abs(dev, ABS_HAT0X, sw_hat_to_axis[hat].x);
348 input_report_abs(dev, ABS_HAT0Y, sw_hat_to_axis[hat].y);
349
350 for (j = 0; j < 9; j++)
351 input_report_key(dev, sw_btn[SW_ID_PP][j], !GB(j,1));
352
353 input_sync(dev);
354
355 return 0;
356
357 case SW_ID_FSP:
358
359 if (!sw_parity(GB(0,43)) || (hat = GB(28,4)) > 8)
360 return -1;
361
17dd3f0f 362 dev = sw->dev[0];
1da177e4
LT		 363 input_report_abs(dev, ABS_X, GB( 0,10));
364 input_report_abs(dev, ABS_Y, GB(16,10));
365 input_report_abs(dev, ABS_THROTTLE, GB(32, 6));
366
367 input_report_abs(dev, ABS_HAT0X, sw_hat_to_axis[hat].x);
368 input_report_abs(dev, ABS_HAT0Y, sw_hat_to_axis[hat].y);
369
370 for (j = 0; j < 6; j++)
371 input_report_key(dev, sw_btn[SW_ID_FSP][j], !GB(j+10,1));
372
373 input_report_key(dev, BTN_TR, !GB(26,1));
374 input_report_key(dev, BTN_START, !GB(27,1));
375 input_report_key(dev, BTN_MODE, !GB(38,1));
376 input_report_key(dev, BTN_SELECT, !GB(39,1));
377
378 input_sync(dev);
379
380 return 0;
381
382 case SW_ID_FFW:
383
384 if (!sw_parity(GB(0,33)))
385 return -1;
386
17dd3f0f 387 dev = sw->dev[0];
1da177e4
LT		 388 input_report_abs(dev, ABS_RX, GB( 0,10));
389 input_report_abs(dev, ABS_RUDDER, GB(10, 6));
390 input_report_abs(dev, ABS_THROTTLE, GB(16, 6));
391
392 for (j = 0; j < 8; j++)
393 input_report_key(dev, sw_btn[SW_ID_FFW][j], !GB(j+22,1));
394
395 input_sync(dev);
396
397 return 0;
398 }
399
400 return -1;
401}
402
403/*
404 * sw_read() reads SideWinder joystick data, and reinitializes
405 * the joystick in case of persistent problems. This is the function that is
406 * called from the generic code to poll the joystick.
407 */
408
409static int sw_read(struct sw *sw)
410{
411 unsigned char buf[SW_LENGTH];
412 int i;
413
414 i = sw_read_packet(sw->gameport, buf, sw->length, 0);
415
416 if (sw->type == SW_ID_3DP && sw->length == 66 && i != 66) { /* Broken packet, try to fix */
417
418 if (i == 64 && !sw_check(sw_get_bits(buf,0,64,1))) { /* Last init failed, 1 bit mode */
419 printk(KERN_WARNING "sidewinder.c: Joystick in wrong mode on %s"
420 " - going to reinitialize.\n", sw->gameport->phys);
421 sw->fail = SW_FAIL; /* Reinitialize */
422 i = 128; /* Bogus value */
423 }
424
425 if (i < 66 && GB(0,64) == GB(i*3-66,64)) /* 1 == 3 */
426 i = 66; /* Everything is fine */
427
428 if (i < 66 && GB(0,64) == GB(66,64)) /* 1 == 2 */
429 i = 66; /* Everything is fine */
430
431 if (i < 66 && GB(i*3-132,64) == GB(i*3-66,64)) { /* 2 == 3 */
432 memmove(buf, buf + i - 22, 22); /* Move data */
433 i = 66; /* Carry on */
434 }
435 }
436
437 if (i == sw->length && !sw_parse(buf, sw)) { /* Parse data */
438
439 sw->fail = 0;
440 sw->ok++;
441
442 if (sw->type == SW_ID_3DP && sw->length == 66 /* Many packets OK */
443 && sw->ok > SW_OK) {
444
445 printk(KERN_INFO "sidewinder.c: No more trouble on %s"
446 " - enabling optimization again.\n", sw->gameport->phys);
447 sw->length = 22;
448 }
449
450 return 0;
451 }
452
453 sw->ok = 0;
454 sw->fail++;
455
456 if (sw->type == SW_ID_3DP && sw->length == 22 && sw->fail > SW_BAD) { /* Consecutive bad packets */
457
458 printk(KERN_INFO "sidewinder.c: Many bit errors on %s"
459 " - disabling optimization.\n", sw->gameport->phys);
460 sw->length = 66;
461 }
462
463 if (sw->fail < SW_FAIL)
464 return -1; /* Not enough, don't reinitialize yet */
465
466 printk(KERN_WARNING "sidewinder.c: Too many bit errors on %s"
467 " - reinitializing joystick.\n", sw->gameport->phys);
468
469 if (!i && sw->type == SW_ID_3DP) { /* 3D Pro can be in analog mode */
470 mdelay(3 * SW_TIMEOUT);
471 sw_init_digital(sw->gameport);
472 }
473
474 mdelay(SW_TIMEOUT);
475 i = sw_read_packet(sw->gameport, buf, SW_LENGTH, 0); /* Read normal data packet */
476 mdelay(SW_TIMEOUT);
477 sw_read_packet(sw->gameport, buf, SW_LENGTH, i); /* Read ID packet, this initializes the stick */
478
479 sw->fail = SW_FAIL;
480
481 return -1;
482}
483
484static void sw_poll(struct gameport *gameport)
485{
486 struct sw *sw = gameport_get_drvdata(gameport);
487
488 sw->reads++;
489 if (sw_read(sw))
490 sw->bads++;
491}
492
493static int sw_open(struct input_dev *dev)
494{
8715c1cf 495 struct sw *sw = input_get_drvdata(dev);
1da177e4
LT		 496
497 gameport_start_polling(sw->gameport);
498 return 0;
499}
500
501static void sw_close(struct input_dev *dev)
502{
8715c1cf 503 struct sw *sw = input_get_drvdata(dev);
1da177e4
LT		 504
505 gameport_stop_polling(sw->gameport);
506}
507
508/*
509 * sw_print_packet() prints the contents of a SideWinder packet.
510 */
511
512static void sw_print_packet(char *name, int length, unsigned char *buf, char bits)
513{
514 int i;
515
516 printk(KERN_INFO "sidewinder.c: %s packet, %d bits. [", name, length);
517 for (i = (((length + 3) >> 2) - 1); i >= 0; i--)
518 printk("%x", (int)sw_get_bits(buf, i << 2, 4, bits));
519 printk("]\n");
520}
521
522/*
523 * sw_3dp_id() translates the 3DP id into a human legible string.
524 * Unfortunately I don't know how to do this for the other SW types.
525 */
526
10ca4c0a 527static void sw_3dp_id(unsigned char *buf, char *comment, size_t size)
1da177e4
LT		 528{
529 int i;
530 char pnp[8], rev[9];
531
532 for (i = 0; i < 7; i++) /* ASCII PnP ID */
533 pnp[i] = sw_get_bits(buf, 24+8*i, 8, 1);
534
535 for (i = 0; i < 8; i++) /* ASCII firmware revision */
536 rev[i] = sw_get_bits(buf, 88+8*i, 8, 1);
537
538 pnp[7] = rev[8] = 0;
539
10ca4c0a 540 snprintf(comment, size, " [PnP %d.%02d id %s rev %s]",
1da177e4
LT		 541 (int) ((sw_get_bits(buf, 8, 6, 1) << 6) | /* Two 6-bit values */
542 sw_get_bits(buf, 16, 6, 1)) / 100,
543 (int) ((sw_get_bits(buf, 8, 6, 1) << 6) |
544 sw_get_bits(buf, 16, 6, 1)) % 100,
545 pnp, rev);
546}
547
548/*
549 * sw_guess_mode() checks the upper two button bits for toggling -
550 * indication of that the joystick is in 3-bit mode. This is documented
551 * behavior for 3DP ID packet, and for example the FSP does this in
552 * normal packets instead. Fun ...
553 */
554
555static int sw_guess_mode(unsigned char *buf, int len)
556{
557 int i;
558 unsigned char xor = 0;
559
560 for (i = 1; i < len; i++)
561 xor |= (buf[i - 1] ^ buf[i]) & 6;
562
563 return !!xor * 2 + 1;
564}
565
566/*
567 * sw_connect() probes for SideWinder type joysticks.
568 */
569
570static int sw_connect(struct gameport *gameport, struct gameport_driver *drv)
571{
572 struct sw *sw;
17dd3f0f 573 struct input_dev *input_dev;
1da177e4 574 int i, j, k, l;
7363cfc8 575 int err = 0;
1da177e4
LT		 576 unsigned char *buf = NULL; /* [SW_LENGTH] */
577 unsigned char *idbuf = NULL; /* [SW_LENGTH] */
578 unsigned char m = 1;
579 char comment[40];
580
581 comment[0] = 0;
582
a97e148a 583 sw = kzalloc(sizeof(struct sw), GFP_KERNEL);
1da177e4
LT		 584 buf = kmalloc(SW_LENGTH, GFP_KERNEL);
585 idbuf = kmalloc(SW_LENGTH, GFP_KERNEL);
586 if (!sw || !buf || !idbuf) {
587 err = -ENOMEM;
588 goto fail1;
589 }
590
591 sw->gameport = gameport;
592
593 gameport_set_drvdata(gameport, sw);
594
595 err = gameport_open(gameport, drv, GAMEPORT_MODE_RAW);
596 if (err)
597 goto fail1;
598
599 dbg("Init 0: Opened %s, io %#x, speed %d",
600 gameport->phys, gameport->io, gameport->speed);
601
602 i = sw_read_packet(gameport, buf, SW_LENGTH, 0); /* Read normal packet */
603 msleep(SW_TIMEOUT);
604 dbg("Init 1: Mode %d. Length %d.", m , i);
605
606 if (!i) { /* No data. 3d Pro analog mode? */
607 sw_init_digital(gameport); /* Switch to digital */
608 msleep(SW_TIMEOUT);
609 i = sw_read_packet(gameport, buf, SW_LENGTH, 0); /* Retry reading packet */
610 msleep(SW_TIMEOUT);
611 dbg("Init 1b: Length %d.", i);
612 if (!i) { /* No data -> FAIL */
613 err = -ENODEV;
614 goto fail2;
615 }
616 }
617
618 j = sw_read_packet(gameport, idbuf, SW_LENGTH, i); /* Read ID. This initializes the stick */
619 m |= sw_guess_mode(idbuf, j); /* ID packet should carry mode info [3DP] */
620 dbg("Init 2: Mode %d. ID Length %d.", m, j);
621
622 if (j <= 0) { /* Read ID failed. Happens in 1-bit mode on PP */
623 msleep(SW_TIMEOUT);
624 i = sw_read_packet(gameport, buf, SW_LENGTH, 0); /* Retry reading packet */
625 m |= sw_guess_mode(buf, i);
626 dbg("Init 2b: Mode %d. Length %d.", m, i);
627 if (!i) {
628 err = -ENODEV;
629 goto fail2;
630 }
631 msleep(SW_TIMEOUT);
632 j = sw_read_packet(gameport, idbuf, SW_LENGTH, i); /* Retry reading ID */
633 dbg("Init 2c: ID Length %d.", j);
634 }
635
636 sw->type = -1;
637 k = SW_FAIL; /* Try SW_FAIL times */
638 l = 0;
639
640 do {
641 k--;
642 msleep(SW_TIMEOUT);
643 i = sw_read_packet(gameport, buf, SW_LENGTH, 0); /* Read data packet */
644 dbg("Init 3: Mode %d. Length %d. Last %d. Tries %d.", m, i, l, k);
645
646 if (i > l) { /* Longer? As we can only lose bits, it makes */
647 /* no sense to try detection for a packet shorter */
648 l = i; /* than the previous one */
649
650 sw->number = 1;
651 sw->gameport = gameport;
652 sw->length = i;
653 sw->bits = m;
654
655 dbg("Init 3a: Case %d.\n", i * m);
656
657 switch (i * m) {
658 case 60:
56c78bb3 659 sw->number++; /* fall through */
1da177e4
LT		 660 case 45: /* Ambiguous packet length */
661 if (j <= 40) { /* ID length less or eq 40 -> FSP */
662 case 43:
663 sw->type = SW_ID_FSP;
664 break;
665 }
56c78bb3 666 sw->number++; /* fall through */
1da177e4 667 case 30:
56c78bb3 668 sw->number++; /* fall through */
1da177e4
LT		 669 case 15:
670 sw->type = SW_ID_GP;
671 break;
672 case 33:
673 case 31:
674 sw->type = SW_ID_FFW;
675 break;
676 case 48: /* Ambiguous */
677 if (j == 14) { /* ID length 14*3 -> FFP */
678 sw->type = SW_ID_FFP;
679 sprintf(comment, " [AC %s]", sw_get_bits(idbuf,38,1,3) ? "off" : "on");
680 } else
10ca4c0a 681 sw->type = SW_ID_PP;
1da177e4
LT		 682 break;
683 case 66:
56c78bb3 684 sw->bits = 3; /* fall through */
1da177e4 685 case 198:
56c78bb3 686 sw->length = 22; /* fall through */
1da177e4
LT		 687 case 64:
688 sw->type = SW_ID_3DP;
10ca4c0a
DT		 689 if (j == 160)
690 sw_3dp_id(idbuf, comment, sizeof(comment));
1da177e4
LT		 691 break;
692 }
693 }
694
695 } while (k && sw->type == -1);
696
697 if (sw->type == -1) {
698 printk(KERN_WARNING "sidewinder.c: unknown joystick device detected "
699 "on %s, contact <vojtech@ucw.cz>\n", gameport->phys);
700 sw_print_packet("ID", j * 3, idbuf, 3);
701 sw_print_packet("Data", i * m, buf, m);
702 err = -ENODEV;
703 goto fail2;
704 }
705
706#ifdef SW_DEBUG
707 sw_print_packet("ID", j * 3, idbuf, 3);
708 sw_print_packet("Data", i * m, buf, m);
709#endif
710
711 gameport_set_poll_handler(gameport, sw_poll);
712 gameport_set_poll_interval(gameport, 20);
713
714 k = i;
715 l = j;
716
717 for (i = 0; i < sw->number; i++) {
718 int bits, code;
719
10ca4c0a
DT		 720 snprintf(sw->name, sizeof(sw->name),
721 "Microsoft SideWinder %s", sw_name[sw->type]);
722 snprintf(sw->phys[i], sizeof(sw->phys[i]),
723 "%s/input%d", gameport->phys, i);
1da177e4 724
847fd5fb 725 sw->dev[i] = input_dev = input_allocate_device();
17dd3f0f
DT		 726 if (!input_dev) {
727 err = -ENOMEM;
728 goto fail3;
729 }
1da177e4 730
17dd3f0f
DT		 731 input_dev->name = sw->name;
732 input_dev->phys = sw->phys[i];
733 input_dev->id.bustype = BUS_GAMEPORT;
734 input_dev->id.vendor = GAMEPORT_ID_VENDOR_MICROSOFT;
735 input_dev->id.product = sw->type;
736 input_dev->id.version = 0x0100;
935e658e 737 input_dev->dev.parent = &gameport->dev;
8715c1cf
DT		 738
739 input_set_drvdata(input_dev, sw);
1da177e4 740
17dd3f0f
DT		 741 input_dev->open = sw_open;
742 input_dev->close = sw_close;
1da177e4 743
7b19ada2 744 input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
1da177e4
LT		 745
746 for (j = 0; (bits = sw_bit[sw->type][j]); j++) {
987a6c02
DM		 747 int min, max, fuzz, flat;
748
1da177e4 749 code = sw_abs[sw->type][j];
987a6c02
DM		 750 min = bits == 1 ? -1 : 0;
751 max = (1 << bits) - 1;
752 fuzz = (bits >> 1) >= 2 ? 1 << ((bits >> 1) - 2) : 0;
753 flat = code == ABS_THROTTLE || bits < 5 ?
754 0 : 1 << (bits - 5);
755
756 input_set_abs_params(input_dev, code,
757 min, max, fuzz, flat);
1da177e4
LT		 758 }
759
760 for (j = 0; (code = sw_btn[sw->type][j]); j++)
987a6c02 761 __set_bit(code, input_dev->keybit);
17dd3f0f
DT		 762
763 dbg("%s%s [%d-bit id %d data %d]\n", sw->name, comment, m, l, k);
1da177e4 764
07cf779c
DT		 765 err = input_register_device(sw->dev[i]);
766 if (err)
767 goto fail4;
1da177e4
LT		 768 }
769
7363cfc8
JJ		 770 out: kfree(buf);
771 kfree(idbuf);
772
773 return err;
1da177e4 774
07cf779c
DT		 775 fail4: input_free_device(sw->dev[i]);
776 fail3: while (--i >= 0)
17dd3f0f
DT		 777 input_unregister_device(sw->dev[i]);
778 fail2: gameport_close(gameport);
779 fail1: gameport_set_drvdata(gameport, NULL);
1da177e4 780 kfree(sw);
7363cfc8 781 goto out;
1da177e4
LT		 782}
783
784static void sw_disconnect(struct gameport *gameport)
785{
786 struct sw *sw = gameport_get_drvdata(gameport);
787 int i;
788
789 for (i = 0; i < sw->number; i++)
17dd3f0f 790 input_unregister_device(sw->dev[i]);
1da177e4
LT		 791 gameport_close(gameport);
792 gameport_set_drvdata(gameport, NULL);
793 kfree(sw);
794}
795
796static struct gameport_driver sw_drv = {
797 .driver = {
798 .name = "sidewinder",
07cf779c 799 .owner = THIS_MODULE,
1da177e4
LT		 800 },
801 .description = DRIVER_DESC,
802 .connect = sw_connect,
803 .disconnect = sw_disconnect,
804};
805
98a84131 806module_gameport_driver(sw_drv);
Linux 6.x block layer and io_uring tree(s)