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Merge tag 'pci-v5.0-fixes-4' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci
[linux-2.6-block.git] / drivers / input / joystick / sidewinder.c
CommitLineData
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
1da177e4
LT		 23 */
24
25#include <linux/delay.h>
26#include <linux/kernel.h>
27#include <linux/module.h>
28#include <linux/slab.h>
1da177e4
LT		 29#include <linux/input.h>
30#include <linux/gameport.h>
4e57b681 31#include <linux/jiffies.h>
1da177e4
LT		 32
33#define DRIVER_DESC "Microsoft SideWinder joystick family driver"
34
35MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
36MODULE_DESCRIPTION(DRIVER_DESC);
37MODULE_LICENSE("GPL");
38
39/*
40 * These are really magic values. Changing them can make a problem go away,
41 * as well as break everything.
42 */
43
44#undef SW_DEBUG
45#undef SW_DEBUG_DATA
46
47#define SW_START 600 /* The time we wait for the first bit [600 us] */
48#define SW_STROBE 60 /* Max time per bit [60 us] */
49#define SW_TIMEOUT 6 /* Wait for everything to settle [6 ms] */
50#define SW_KICK 45 /* Wait after A0 fall till kick [45 us] */
51#define SW_END 8 /* Number of bits before end of packet to kick */
52#define SW_FAIL 16 /* Number of packet read errors to fail and reinitialize */
53#define SW_BAD 2 /* Number of packet read errors to switch off 3d Pro optimization */
54#define SW_OK 64 /* Number of packet read successes to switch optimization back on */
55#define SW_LENGTH 512 /* Max number of bits in a packet */
56
57#ifdef SW_DEBUG
58#define dbg(format, arg...) printk(KERN_DEBUG __FILE__ ": " format "\n" , ## arg)
59#else
60#define dbg(format, arg...) do {} while (0)
61#endif
62
63/*
64 * SideWinder joystick types ...
65 */
66
67#define SW_ID_3DP 0
68#define SW_ID_GP 1
69#define SW_ID_PP 2
70#define SW_ID_FFP 3
71#define SW_ID_FSP 4
72#define SW_ID_FFW 5
73
74/*
75 * Names, buttons, axes ...
76 */
77
78static char *sw_name[] = { "3D Pro", "GamePad", "Precision Pro", "Force Feedback Pro", "FreeStyle Pro",
79 "Force Feedback Wheel" };
80
81static char sw_abs[][7] = {
82 { ABS_X, ABS_Y, ABS_RZ, ABS_THROTTLE, ABS_HAT0X, ABS_HAT0Y },
83 { ABS_X, ABS_Y },
84 { ABS_X, ABS_Y, ABS_RZ, ABS_THROTTLE, ABS_HAT0X, ABS_HAT0Y },
85 { ABS_X, ABS_Y, ABS_RZ, ABS_THROTTLE, ABS_HAT0X, ABS_HAT0Y },
86 { ABS_X, ABS_Y, ABS_THROTTLE, ABS_HAT0X, ABS_HAT0Y },
87 { ABS_RX, ABS_RUDDER, ABS_THROTTLE }};
88
89static char sw_bit[][7] = {
90 { 10, 10, 9, 10, 1, 1 },
91 { 1, 1 },
92 { 10, 10, 6, 7, 1, 1 },
93 { 10, 10, 6, 7, 1, 1 },
94 { 10, 10, 6, 1, 1 },
95 { 10, 7, 7, 1, 1 }};
96
97static short sw_btn[][12] = {
98 { BTN_TRIGGER, BTN_TOP, BTN_THUMB, BTN_THUMB2, BTN_BASE, BTN_BASE2, BTN_BASE3, BTN_BASE4, BTN_MODE },
99 { BTN_A, BTN_B, BTN_C, BTN_X, BTN_Y, BTN_Z, BTN_TL, BTN_TR, BTN_START, BTN_MODE },
100 { BTN_TRIGGER, BTN_THUMB, BTN_TOP, BTN_TOP2, BTN_BASE, BTN_BASE2, BTN_BASE3, BTN_BASE4, BTN_SELECT },
101 { BTN_TRIGGER, BTN_THUMB, BTN_TOP, BTN_TOP2, BTN_BASE, BTN_BASE2, BTN_BASE3, BTN_BASE4, BTN_SELECT },
102 { BTN_A, BTN_B, BTN_C, BTN_X, BTN_Y, BTN_Z, BTN_TL, BTN_TR, BTN_START, BTN_MODE, BTN_SELECT },
103 { BTN_TRIGGER, BTN_TOP, BTN_THUMB, BTN_THUMB2, BTN_BASE, BTN_BASE2, BTN_BASE3, BTN_BASE4 }};
104
105static struct {
106 int x;
107 int y;
108} sw_hat_to_axis[] = {{ 0, 0}, { 0,-1}, { 1,-1}, { 1, 0}, { 1, 1}, { 0, 1}, {-1, 1}, {-1, 0}, {-1,-1}};
109
110struct sw {
111 struct gameport *gameport;
17dd3f0f 112 struct input_dev *dev[4];
1da177e4
LT		 113 char name[64];
114 char phys[4][32];
115 int length;
116 int type;
117 int bits;
118 int number;
119 int fail;
120 int ok;
121 int reads;
122 int bads;
123};
124
125/*
126 * sw_read_packet() is a function which reads either a data packet, or an
127 * identification packet from a SideWinder joystick. The protocol is very,
128 * very, very braindamaged. Microsoft patented it in US patent #5628686.
129 */
130
131static int sw_read_packet(struct gameport *gameport, unsigned char *buf, int length, int id)
132{
133 unsigned long flags;
134 int timeout, bitout, sched, i, kick, start, strobe;
135 unsigned char pending, u, v;
136
137 i = -id; /* Don't care about data, only want ID */
138 timeout = id ? gameport_time(gameport, SW_TIMEOUT * 1000) : 0; /* Set up global timeout for ID packet */
139 kick = id ? gameport_time(gameport, SW_KICK) : 0; /* Set up kick timeout for ID packet */
140 start = gameport_time(gameport, SW_START);
141 strobe = gameport_time(gameport, SW_STROBE);
142 bitout = start;
143 pending = 0;
144 sched = 0;
145
146 local_irq_save(flags); /* Quiet, please */
147
148 gameport_trigger(gameport); /* Trigger */
149 v = gameport_read(gameport);
150
151 do {
152 bitout--;
153 u = v;
154 v = gameport_read(gameport);
155 } while (!(~v & u & 0x10) && (bitout > 0)); /* Wait for first falling edge on clock */
156
157 if (bitout > 0)
158 bitout = strobe; /* Extend time if not timed out */
159
160 while ((timeout > 0 || bitout > 0) && (i < length)) {
161
162 timeout--;
163 bitout--; /* Decrement timers */
164 sched--;
165
166 u = v;
167 v = gameport_read(gameport);
168
169 if ((~u & v & 0x10) && (bitout > 0)) { /* Rising edge on clock - data bit */
170 if (i >= 0) /* Want this data */
171 buf[i] = v >> 5; /* Store it */
172 i++; /* Advance index */
173 bitout = strobe; /* Extend timeout for next bit */
174 }
175
176 if (kick && (~v & u & 0x01)) { /* Falling edge on axis 0 */
177 sched = kick; /* Schedule second trigger */
178 kick = 0; /* Don't schedule next time on falling edge */
179 pending = 1; /* Mark schedule */
180 }
181
182 if (pending && sched < 0 && (i > -SW_END)) { /* Second trigger time */
183 gameport_trigger(gameport); /* Trigger */
184 bitout = start; /* Long bit timeout */
185 pending = 0; /* Unmark schedule */
186 timeout = 0; /* Switch from global to bit timeouts */
187 }
188 }
189
190 local_irq_restore(flags); /* Done - relax */
191
192#ifdef SW_DEBUG_DATA
193 {
194 int j;
195 printk(KERN_DEBUG "sidewinder.c: Read %d triplets. [", i);
196 for (j = 0; j < i; j++) printk("%d", buf[j]);
197 printk("]\n");
198 }
199#endif
200
201 return i;
202}
203
204/*
205 * sw_get_bits() and GB() compose bits from the triplet buffer into a __u64.
206 * Parameter 'pos' is bit number inside packet where to start at, 'num' is number
207 * of bits to be read, 'shift' is offset in the resulting __u64 to start at, bits
208 * is number of bits per triplet.
209 */
210
211#define GB(pos,num) sw_get_bits(buf, pos, num, sw->bits)
212
213static __u64 sw_get_bits(unsigned char *buf, int pos, int num, char bits)
214{
215 __u64 data = 0;
216 int tri = pos % bits; /* Start position */
217 int i = pos / bits;
218 int bit = 0;
219
220 while (num--) {
221 data |= (__u64)((buf[i] >> tri++) & 1) << bit++; /* Transfer bit */
222 if (tri == bits) {
223 i++; /* Next triplet */
224 tri = 0;
225 }
226 }
227
228 return data;
229}
230
231/*
232 * sw_init_digital() initializes a SideWinder 3D Pro joystick
233 * into digital mode.
234 */
235
236static void sw_init_digital(struct gameport *gameport)
237{
238 int seq[] = { 140, 140+725, 140+300, 0 };
239 unsigned long flags;
240 int i, t;
241
242 local_irq_save(flags);
243
244 i = 0;
245 do {
246 gameport_trigger(gameport); /* Trigger */
247 t = gameport_time(gameport, SW_TIMEOUT * 1000);
248 while ((gameport_read(gameport) & 1) && t) t--; /* Wait for axis to fall back to 0 */
249 udelay(seq[i]); /* Delay magic time */
250 } while (seq[++i]);
251
252 gameport_trigger(gameport); /* Last trigger */
253
254 local_irq_restore(flags);
255}
256
257/*
258 * sw_parity() computes parity of __u64
259 */
260
261static int sw_parity(__u64 t)
262{
263 int x = t ^ (t >> 32);
264
265 x ^= x >> 16;
266 x ^= x >> 8;
267 x ^= x >> 4;
268 x ^= x >> 2;
269 x ^= x >> 1;
270 return x & 1;
271}
272
273/*
274 * sw_ccheck() checks synchronization bits and computes checksum of nibbles.
275 */
276
277static int sw_check(__u64 t)
278{
279 unsigned char sum = 0;
280
281 if ((t & 0x8080808080808080ULL) ^ 0x80) /* Sync */
282 return -1;
283
284 while (t) { /* Sum */
285 sum += t & 0xf;
286 t >>= 4;
287 }
288
289 return sum & 0xf;
290}
291
292/*
293 * sw_parse() analyzes SideWinder joystick data, and writes the results into
294 * the axes and buttons arrays.
295 */
296
297static int sw_parse(unsigned char *buf, struct sw *sw)
298{
299 int hat, i, j;
17dd3f0f 300 struct input_dev *dev;
1da177e4
LT		 301
302 switch (sw->type) {
303
304 case SW_ID_3DP:
305
306 if (sw_check(GB(0,64)) || (hat = (GB(6,1) << 3) | GB(60,3)) > 8)
307 return -1;
308
17dd3f0f
DT		 309 dev = sw->dev[0];
310
1da177e4
LT		 311 input_report_abs(dev, ABS_X, (GB( 3,3) << 7) | GB(16,7));
312 input_report_abs(dev, ABS_Y, (GB( 0,3) << 7) | GB(24,7));
313 input_report_abs(dev, ABS_RZ, (GB(35,2) << 7) | GB(40,7));
314 input_report_abs(dev, ABS_THROTTLE, (GB(32,3) << 7) | GB(48,7));
315
316 input_report_abs(dev, ABS_HAT0X, sw_hat_to_axis[hat].x);
317 input_report_abs(dev, ABS_HAT0Y, sw_hat_to_axis[hat].y);
318
319 for (j = 0; j < 7; j++)
320 input_report_key(dev, sw_btn[SW_ID_3DP][j], !GB(j+8,1));
321
322 input_report_key(dev, BTN_BASE4, !GB(38,1));
323 input_report_key(dev, BTN_BASE5, !GB(37,1));
324
325 input_sync(dev);
326
327 return 0;
328
329 case SW_ID_GP:
330
331 for (i = 0; i < sw->number; i ++) {
332
333 if (sw_parity(GB(i*15,15)))
334 return -1;
335
17dd3f0f
DT		 336 input_report_abs(sw->dev[i], ABS_X, GB(i*15+3,1) - GB(i*15+2,1));
337 input_report_abs(sw->dev[i], ABS_Y, GB(i*15+0,1) - GB(i*15+1,1));
1da177e4
LT		 338
339 for (j = 0; j < 10; j++)
17dd3f0f 340 input_report_key(sw->dev[i], sw_btn[SW_ID_GP][j], !GB(i*15+j+4,1));
1da177e4 341
17dd3f0f 342 input_sync(sw->dev[i]);
1da177e4
LT		 343 }
344
345 return 0;
346
347 case SW_ID_PP:
348 case SW_ID_FFP:
349
350 if (!sw_parity(GB(0,48)) || (hat = GB(42,4)) > 8)
351 return -1;
352
17dd3f0f 353 dev = sw->dev[0];
1da177e4
LT		 354 input_report_abs(dev, ABS_X, GB( 9,10));
355 input_report_abs(dev, ABS_Y, GB(19,10));
356 input_report_abs(dev, ABS_RZ, GB(36, 6));
357 input_report_abs(dev, ABS_THROTTLE, GB(29, 7));
358
359 input_report_abs(dev, ABS_HAT0X, sw_hat_to_axis[hat].x);
360 input_report_abs(dev, ABS_HAT0Y, sw_hat_to_axis[hat].y);
361
362 for (j = 0; j < 9; j++)
363 input_report_key(dev, sw_btn[SW_ID_PP][j], !GB(j,1));
364
365 input_sync(dev);
366
367 return 0;
368
369 case SW_ID_FSP:
370
371 if (!sw_parity(GB(0,43)) || (hat = GB(28,4)) > 8)
372 return -1;
373
17dd3f0f 374 dev = sw->dev[0];
1da177e4
LT		 375 input_report_abs(dev, ABS_X, GB( 0,10));
376 input_report_abs(dev, ABS_Y, GB(16,10));
377 input_report_abs(dev, ABS_THROTTLE, GB(32, 6));
378
379 input_report_abs(dev, ABS_HAT0X, sw_hat_to_axis[hat].x);
380 input_report_abs(dev, ABS_HAT0Y, sw_hat_to_axis[hat].y);
381
382 for (j = 0; j < 6; j++)
383 input_report_key(dev, sw_btn[SW_ID_FSP][j], !GB(j+10,1));
384
385 input_report_key(dev, BTN_TR, !GB(26,1));
386 input_report_key(dev, BTN_START, !GB(27,1));
387 input_report_key(dev, BTN_MODE, !GB(38,1));
388 input_report_key(dev, BTN_SELECT, !GB(39,1));
389
390 input_sync(dev);
391
392 return 0;
393
394 case SW_ID_FFW:
395
396 if (!sw_parity(GB(0,33)))
397 return -1;
398
17dd3f0f 399 dev = sw->dev[0];
1da177e4
LT		 400 input_report_abs(dev, ABS_RX, GB( 0,10));
401 input_report_abs(dev, ABS_RUDDER, GB(10, 6));
402 input_report_abs(dev, ABS_THROTTLE, GB(16, 6));
403
404 for (j = 0; j < 8; j++)
405 input_report_key(dev, sw_btn[SW_ID_FFW][j], !GB(j+22,1));
406
407 input_sync(dev);
408
409 return 0;
410 }
411
412 return -1;
413}
414
415/*
416 * sw_read() reads SideWinder joystick data, and reinitializes
417 * the joystick in case of persistent problems. This is the function that is
418 * called from the generic code to poll the joystick.
419 */
420
421static int sw_read(struct sw *sw)
422{
423 unsigned char buf[SW_LENGTH];
424 int i;
425
426 i = sw_read_packet(sw->gameport, buf, sw->length, 0);
427
428 if (sw->type == SW_ID_3DP && sw->length == 66 && i != 66) { /* Broken packet, try to fix */
429
430 if (i == 64 && !sw_check(sw_get_bits(buf,0,64,1))) { /* Last init failed, 1 bit mode */
431 printk(KERN_WARNING "sidewinder.c: Joystick in wrong mode on %s"
432 " - going to reinitialize.\n", sw->gameport->phys);
433 sw->fail = SW_FAIL; /* Reinitialize */
434 i = 128; /* Bogus value */
435 }
436
437 if (i < 66 && GB(0,64) == GB(i*3-66,64)) /* 1 == 3 */
438 i = 66; /* Everything is fine */
439
440 if (i < 66 && GB(0,64) == GB(66,64)) /* 1 == 2 */
441 i = 66; /* Everything is fine */
442
443 if (i < 66 && GB(i*3-132,64) == GB(i*3-66,64)) { /* 2 == 3 */
444 memmove(buf, buf + i - 22, 22); /* Move data */
445 i = 66; /* Carry on */
446 }
447 }
448
449 if (i == sw->length && !sw_parse(buf, sw)) { /* Parse data */
450
451 sw->fail = 0;
452 sw->ok++;
453
454 if (sw->type == SW_ID_3DP && sw->length == 66 /* Many packets OK */
455 && sw->ok > SW_OK) {
456
457 printk(KERN_INFO "sidewinder.c: No more trouble on %s"
458 " - enabling optimization again.\n", sw->gameport->phys);
459 sw->length = 22;
460 }
461
462 return 0;
463 }
464
465 sw->ok = 0;
466 sw->fail++;
467
468 if (sw->type == SW_ID_3DP && sw->length == 22 && sw->fail > SW_BAD) { /* Consecutive bad packets */
469
470 printk(KERN_INFO "sidewinder.c: Many bit errors on %s"
471 " - disabling optimization.\n", sw->gameport->phys);
472 sw->length = 66;
473 }
474
475 if (sw->fail < SW_FAIL)
476 return -1; /* Not enough, don't reinitialize yet */
477
478 printk(KERN_WARNING "sidewinder.c: Too many bit errors on %s"
479 " - reinitializing joystick.\n", sw->gameport->phys);
480
481 if (!i && sw->type == SW_ID_3DP) { /* 3D Pro can be in analog mode */
482 mdelay(3 * SW_TIMEOUT);
483 sw_init_digital(sw->gameport);
484 }
485
486 mdelay(SW_TIMEOUT);
487 i = sw_read_packet(sw->gameport, buf, SW_LENGTH, 0); /* Read normal data packet */
488 mdelay(SW_TIMEOUT);
489 sw_read_packet(sw->gameport, buf, SW_LENGTH, i); /* Read ID packet, this initializes the stick */
490
491 sw->fail = SW_FAIL;
492
493 return -1;
494}
495
496static void sw_poll(struct gameport *gameport)
497{
498 struct sw *sw = gameport_get_drvdata(gameport);
499
500 sw->reads++;
501 if (sw_read(sw))
502 sw->bads++;
503}
504
505static int sw_open(struct input_dev *dev)
506{
8715c1cf 507 struct sw *sw = input_get_drvdata(dev);
1da177e4
LT		 508
509 gameport_start_polling(sw->gameport);
510 return 0;
511}
512
513static void sw_close(struct input_dev *dev)
514{
8715c1cf 515 struct sw *sw = input_get_drvdata(dev);
1da177e4
LT		 516
517 gameport_stop_polling(sw->gameport);
518}
519
520/*
521 * sw_print_packet() prints the contents of a SideWinder packet.
522 */
523
524static void sw_print_packet(char *name, int length, unsigned char *buf, char bits)
525{
526 int i;
527
528 printk(KERN_INFO "sidewinder.c: %s packet, %d bits. [", name, length);
529 for (i = (((length + 3) >> 2) - 1); i >= 0; i--)
530 printk("%x", (int)sw_get_bits(buf, i << 2, 4, bits));
531 printk("]\n");
532}
533
534/*
535 * sw_3dp_id() translates the 3DP id into a human legible string.
536 * Unfortunately I don't know how to do this for the other SW types.
537 */
538
10ca4c0a 539static void sw_3dp_id(unsigned char *buf, char *comment, size_t size)
1da177e4
LT		 540{
541 int i;
542 char pnp[8], rev[9];
543
544 for (i = 0; i < 7; i++) /* ASCII PnP ID */
545 pnp[i] = sw_get_bits(buf, 24+8*i, 8, 1);
546
547 for (i = 0; i < 8; i++) /* ASCII firmware revision */
548 rev[i] = sw_get_bits(buf, 88+8*i, 8, 1);
549
550 pnp[7] = rev[8] = 0;
551
10ca4c0a 552 snprintf(comment, size, " [PnP %d.%02d id %s rev %s]",
1da177e4
LT		 553 (int) ((sw_get_bits(buf, 8, 6, 1) << 6) | /* Two 6-bit values */
554 sw_get_bits(buf, 16, 6, 1)) / 100,
555 (int) ((sw_get_bits(buf, 8, 6, 1) << 6) |
556 sw_get_bits(buf, 16, 6, 1)) % 100,
557 pnp, rev);
558}
559
560/*
561 * sw_guess_mode() checks the upper two button bits for toggling -
562 * indication of that the joystick is in 3-bit mode. This is documented
563 * behavior for 3DP ID packet, and for example the FSP does this in
564 * normal packets instead. Fun ...
565 */
566
567static int sw_guess_mode(unsigned char *buf, int len)
568{
569 int i;
570 unsigned char xor = 0;
571
572 for (i = 1; i < len; i++)
573 xor |= (buf[i - 1] ^ buf[i]) & 6;
574
575 return !!xor * 2 + 1;
576}
577
578/*
579 * sw_connect() probes for SideWinder type joysticks.
580 */
581
582static int sw_connect(struct gameport *gameport, struct gameport_driver *drv)
583{
584 struct sw *sw;
17dd3f0f 585 struct input_dev *input_dev;
1da177e4 586 int i, j, k, l;
7363cfc8 587 int err = 0;
1da177e4
LT		 588 unsigned char *buf = NULL; /* [SW_LENGTH] */
589 unsigned char *idbuf = NULL; /* [SW_LENGTH] */
590 unsigned char m = 1;
591 char comment[40];
592
593 comment[0] = 0;
594
a97e148a 595 sw = kzalloc(sizeof(struct sw), GFP_KERNEL);
1da177e4
LT		 596 buf = kmalloc(SW_LENGTH, GFP_KERNEL);
597 idbuf = kmalloc(SW_LENGTH, GFP_KERNEL);
598 if (!sw || !buf || !idbuf) {
599 err = -ENOMEM;
600 goto fail1;
601 }
602
603 sw->gameport = gameport;
604
605 gameport_set_drvdata(gameport, sw);
606
607 err = gameport_open(gameport, drv, GAMEPORT_MODE_RAW);
608 if (err)
609 goto fail1;
610
611 dbg("Init 0: Opened %s, io %#x, speed %d",
612 gameport->phys, gameport->io, gameport->speed);
613
614 i = sw_read_packet(gameport, buf, SW_LENGTH, 0); /* Read normal packet */
615 msleep(SW_TIMEOUT);
616 dbg("Init 1: Mode %d. Length %d.", m , i);
617
618 if (!i) { /* No data. 3d Pro analog mode? */
619 sw_init_digital(gameport); /* Switch to digital */
620 msleep(SW_TIMEOUT);
621 i = sw_read_packet(gameport, buf, SW_LENGTH, 0); /* Retry reading packet */
622 msleep(SW_TIMEOUT);
623 dbg("Init 1b: Length %d.", i);
624 if (!i) { /* No data -> FAIL */
625 err = -ENODEV;
626 goto fail2;
627 }
628 }
629
630 j = sw_read_packet(gameport, idbuf, SW_LENGTH, i); /* Read ID. This initializes the stick */
631 m |= sw_guess_mode(idbuf, j); /* ID packet should carry mode info [3DP] */
632 dbg("Init 2: Mode %d. ID Length %d.", m, j);
633
634 if (j <= 0) { /* Read ID failed. Happens in 1-bit mode on PP */
635 msleep(SW_TIMEOUT);
636 i = sw_read_packet(gameport, buf, SW_LENGTH, 0); /* Retry reading packet */
637 m |= sw_guess_mode(buf, i);
638 dbg("Init 2b: Mode %d. Length %d.", m, i);
639 if (!i) {
640 err = -ENODEV;
641 goto fail2;
642 }
643 msleep(SW_TIMEOUT);
644 j = sw_read_packet(gameport, idbuf, SW_LENGTH, i); /* Retry reading ID */
645 dbg("Init 2c: ID Length %d.", j);
646 }
647
648 sw->type = -1;
649 k = SW_FAIL; /* Try SW_FAIL times */
650 l = 0;
651
652 do {
653 k--;
654 msleep(SW_TIMEOUT);
655 i = sw_read_packet(gameport, buf, SW_LENGTH, 0); /* Read data packet */
656 dbg("Init 3: Mode %d. Length %d. Last %d. Tries %d.", m, i, l, k);
657
658 if (i > l) { /* Longer? As we can only lose bits, it makes */
659 /* no sense to try detection for a packet shorter */
660 l = i; /* than the previous one */
661
662 sw->number = 1;
663 sw->gameport = gameport;
664 sw->length = i;
665 sw->bits = m;
666
667 dbg("Init 3a: Case %d.\n", i * m);
668
669 switch (i * m) {
670 case 60:
56c78bb3 671 sw->number++; /* fall through */
1da177e4
LT		 672 case 45: /* Ambiguous packet length */
673 if (j <= 40) { /* ID length less or eq 40 -> FSP */
674 case 43:
675 sw->type = SW_ID_FSP;
676 break;
677 }
56c78bb3 678 sw->number++; /* fall through */
1da177e4 679 case 30:
56c78bb3 680 sw->number++; /* fall through */
1da177e4
LT		 681 case 15:
682 sw->type = SW_ID_GP;
683 break;
684 case 33:
685 case 31:
686 sw->type = SW_ID_FFW;
687 break;
688 case 48: /* Ambiguous */
689 if (j == 14) { /* ID length 14*3 -> FFP */
690 sw->type = SW_ID_FFP;
691 sprintf(comment, " [AC %s]", sw_get_bits(idbuf,38,1,3) ? "off" : "on");
692 } else
10ca4c0a 693 sw->type = SW_ID_PP;
1da177e4
LT		 694 break;
695 case 66:
56c78bb3 696 sw->bits = 3; /* fall through */
1da177e4 697 case 198:
56c78bb3 698 sw->length = 22; /* fall through */
1da177e4
LT		 699 case 64:
700 sw->type = SW_ID_3DP;
10ca4c0a
DT		 701 if (j == 160)
702 sw_3dp_id(idbuf, comment, sizeof(comment));
1da177e4
LT		 703 break;
704 }
705 }
706
707 } while (k && sw->type == -1);
708
709 if (sw->type == -1) {
710 printk(KERN_WARNING "sidewinder.c: unknown joystick device detected "
711 "on %s, contact <vojtech@ucw.cz>\n", gameport->phys);
712 sw_print_packet("ID", j * 3, idbuf, 3);
713 sw_print_packet("Data", i * m, buf, m);
714 err = -ENODEV;
715 goto fail2;
716 }
717
718#ifdef SW_DEBUG
719 sw_print_packet("ID", j * 3, idbuf, 3);
720 sw_print_packet("Data", i * m, buf, m);
721#endif
722
723 gameport_set_poll_handler(gameport, sw_poll);
724 gameport_set_poll_interval(gameport, 20);
725
726 k = i;
727 l = j;
728
729 for (i = 0; i < sw->number; i++) {
730 int bits, code;
731
10ca4c0a
DT		 732 snprintf(sw->name, sizeof(sw->name),
733 "Microsoft SideWinder %s", sw_name[sw->type]);
734 snprintf(sw->phys[i], sizeof(sw->phys[i]),
735 "%s/input%d", gameport->phys, i);
1da177e4 736
847fd5fb 737 sw->dev[i] = input_dev = input_allocate_device();
17dd3f0f
DT		 738 if (!input_dev) {
739 err = -ENOMEM;
740 goto fail3;
741 }
1da177e4 742
17dd3f0f
DT		 743 input_dev->name = sw->name;
744 input_dev->phys = sw->phys[i];
745 input_dev->id.bustype = BUS_GAMEPORT;
746 input_dev->id.vendor = GAMEPORT_ID_VENDOR_MICROSOFT;
747 input_dev->id.product = sw->type;
748 input_dev->id.version = 0x0100;
935e658e 749 input_dev->dev.parent = &gameport->dev;
8715c1cf
DT		 750
751 input_set_drvdata(input_dev, sw);
1da177e4 752
17dd3f0f
DT		 753 input_dev->open = sw_open;
754 input_dev->close = sw_close;
1da177e4 755
7b19ada2 756 input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
1da177e4
LT		 757
758 for (j = 0; (bits = sw_bit[sw->type][j]); j++) {
987a6c02
DM		 759 int min, max, fuzz, flat;
760
1da177e4 761 code = sw_abs[sw->type][j];
987a6c02
DM		 762 min = bits == 1 ? -1 : 0;
763 max = (1 << bits) - 1;
764 fuzz = (bits >> 1) >= 2 ? 1 << ((bits >> 1) - 2) : 0;
765 flat = code == ABS_THROTTLE || bits < 5 ?
766 0 : 1 << (bits - 5);
767
768 input_set_abs_params(input_dev, code,
769 min, max, fuzz, flat);
1da177e4
LT		 770 }
771
772 for (j = 0; (code = sw_btn[sw->type][j]); j++)
987a6c02 773 __set_bit(code, input_dev->keybit);
17dd3f0f
DT		 774
775 dbg("%s%s [%d-bit id %d data %d]\n", sw->name, comment, m, l, k);
1da177e4 776
07cf779c
DT		 777 err = input_register_device(sw->dev[i]);
778 if (err)
779 goto fail4;
1da177e4
LT		 780 }
781
7363cfc8
JJ		 782 out: kfree(buf);
783 kfree(idbuf);
784
785 return err;
1da177e4 786
07cf779c
DT		 787 fail4: input_free_device(sw->dev[i]);
788 fail3: while (--i >= 0)
17dd3f0f
DT		 789 input_unregister_device(sw->dev[i]);
790 fail2: gameport_close(gameport);
791 fail1: gameport_set_drvdata(gameport, NULL);
1da177e4 792 kfree(sw);
7363cfc8 793 goto out;
1da177e4
LT		 794}
795
796static void sw_disconnect(struct gameport *gameport)
797{
798 struct sw *sw = gameport_get_drvdata(gameport);
799 int i;
800
801 for (i = 0; i < sw->number; i++)
17dd3f0f 802 input_unregister_device(sw->dev[i]);
1da177e4
LT		 803 gameport_close(gameport);
804 gameport_set_drvdata(gameport, NULL);
805 kfree(sw);
806}
807
808static struct gameport_driver sw_drv = {
809 .driver = {
810 .name = "sidewinder",
07cf779c 811 .owner = THIS_MODULE,
1da177e4
LT		 812 },
813 .description = DRIVER_DESC,
814 .connect = sw_connect,
815 .disconnect = sw_disconnect,
816};
817
98a84131 818module_gameport_driver(sw_drv);
Linux 6.x block layer and io_uring tree(s)