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13#include <linux/delay.h>
14#include <linux/kernel.h>
15#include <linux/module.h>
16#include <linux/slab.h>
17#include <linux/bitops.h>
18#include <linux/init.h>
19#include <linux/input.h>
20#include <linux/gameport.h>
21#include <linux/jiffies.h>
22#include <linux/timex.h>
23#include <linux/timekeeping.h>
24
25#define DRIVER_DESC "Analog joystick and gamepad driver"
26
27MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
28MODULE_DESCRIPTION(DRIVER_DESC);
29MODULE_LICENSE("GPL");
30
31
32
33
34
35#define ANALOG_PORTS 16
36
37static char *js[ANALOG_PORTS];
38static unsigned int js_nargs;
39static int analog_options[ANALOG_PORTS];
40module_param_array_named(map, js, charp, &js_nargs, 0);
41MODULE_PARM_DESC(map, "Describes analog joysticks type/capabilities");
42
43
44
45
46
47#define ANALOG_RUDDER 0x00004
48#define ANALOG_THROTTLE 0x00008
49#define ANALOG_AXES_STD 0x0000f
50#define ANALOG_BTNS_STD 0x000f0
51
52#define ANALOG_BTNS_CHF 0x00100
53#define ANALOG_HAT1_CHF 0x00200
54#define ANALOG_HAT2_CHF 0x00400
55#define ANALOG_HAT_FCS 0x00800
56#define ANALOG_HATS_ALL 0x00e00
57#define ANALOG_BTN_TL 0x01000
58#define ANALOG_BTN_TR 0x02000
59#define ANALOG_BTN_TL2 0x04000
60#define ANALOG_BTN_TR2 0x08000
61#define ANALOG_BTNS_TLR 0x03000
62#define ANALOG_BTNS_TLR2 0x0c000
63#define ANALOG_BTNS_GAMEPAD 0x0f000
64
65#define ANALOG_HBTN_CHF 0x10000
66#define ANALOG_ANY_CHF 0x10700
67#define ANALOG_SAITEK 0x20000
68#define ANALOG_EXTENSIONS 0x7ff00
69#define ANALOG_GAMEPAD 0x80000
70
71#define ANALOG_MAX_TIME 3
72#define ANALOG_LOOP_TIME 2000
73#define ANALOG_SAITEK_DELAY 200
74#define ANALOG_SAITEK_TIME 2000
75#define ANALOG_AXIS_TIME 2
76#define ANALOG_INIT_RETRIES 8
77#define ANALOG_FUZZ_BITS 2
78#define ANALOG_FUZZ_MAGIC 36
79
80#define ANALOG_MAX_NAME_LENGTH 128
81#define ANALOG_MAX_PHYS_LENGTH 32
82
83static short analog_axes[] = { ABS_X, ABS_Y, ABS_RUDDER, ABS_THROTTLE };
84static short analog_hats[] = { ABS_HAT0X, ABS_HAT0Y, ABS_HAT1X, ABS_HAT1Y, ABS_HAT2X, ABS_HAT2Y };
85static short analog_pads[] = { BTN_Y, BTN_Z, BTN_TL, BTN_TR };
86static short analog_exts[] = { ANALOG_HAT1_CHF, ANALOG_HAT2_CHF, ANALOG_HAT_FCS };
87static short analog_pad_btn[] = { BTN_A, BTN_B, BTN_C, BTN_X, BTN_TL2, BTN_TR2, BTN_SELECT, BTN_START, BTN_MODE, BTN_BASE };
88static short analog_joy_btn[] = { BTN_TRIGGER, BTN_THUMB, BTN_TOP, BTN_TOP2, BTN_BASE, BTN_BASE2,
89 BTN_BASE3, BTN_BASE4, BTN_BASE5, BTN_BASE6 };
90
91static unsigned char analog_chf[] = { 0xf, 0x0, 0x1, 0x9, 0x2, 0x4, 0xc, 0x8, 0x3, 0x5, 0xb, 0x7, 0xd, 0xe, 0xa, 0x6 };
92
93struct analog {
94 struct input_dev *dev;
95 int mask;
96 short *buttons;
97 char name[ANALOG_MAX_NAME_LENGTH];
98 char phys[ANALOG_MAX_PHYS_LENGTH];
99};
100
101struct analog_port {
102 struct gameport *gameport;
103 struct analog analog[2];
104 unsigned char mask;
105 char saitek;
106 char cooked;
107 int bads;
108 int reads;
109 int loop;
110 int fuzz;
111 int axes[4];
112 int buttons;
113 int initial[4];
114 int axtime;
115};
116
117
118
119
120
121static void analog_decode(struct analog *analog, int *axes, int *initial, int buttons)
122{
123 struct input_dev *dev = analog->dev;
124 int i, j;
125
126 if (analog->mask & ANALOG_HAT_FCS)
127 for (i = 0; i < 4; i++)
128 if (axes[3] < ((initial[3] * ((i << 1) + 1)) >> 3)) {
129 buttons |= 1 << (i + 14);
130 break;
131 }
132
133 for (i = j = 0; i < 6; i++)
134 if (analog->mask & (0x10 << i))
135 input_report_key(dev, analog->buttons[j++], (buttons >> i) & 1);
136
137 if (analog->mask & ANALOG_HBTN_CHF)
138 for (i = 0; i < 4; i++)
139 input_report_key(dev, analog->buttons[j++], (buttons >> (i + 10)) & 1);
140
141 if (analog->mask & ANALOG_BTN_TL)
142 input_report_key(dev, analog_pads[0], axes[2] < (initial[2] >> 1));
143 if (analog->mask & ANALOG_BTN_TR)
144 input_report_key(dev, analog_pads[1], axes[3] < (initial[3] >> 1));
145 if (analog->mask & ANALOG_BTN_TL2)
146 input_report_key(dev, analog_pads[2], axes[2] > (initial[2] + (initial[2] >> 1)));
147 if (analog->mask & ANALOG_BTN_TR2)
148 input_report_key(dev, analog_pads[3], axes[3] > (initial[3] + (initial[3] >> 1)));
149
150 for (i = j = 0; i < 4; i++)
151 if (analog->mask & (1 << i))
152 input_report_abs(dev, analog_axes[j++], axes[i]);
153
154 for (i = j = 0; i < 3; i++)
155 if (analog->mask & analog_exts[i]) {
156 input_report_abs(dev, analog_hats[j++],
157 ((buttons >> ((i << 2) + 7)) & 1) - ((buttons >> ((i << 2) + 9)) & 1));
158 input_report_abs(dev, analog_hats[j++],
159 ((buttons >> ((i << 2) + 8)) & 1) - ((buttons >> ((i << 2) + 6)) & 1));
160 }
161
162 input_sync(dev);
163}
164
165
166
167
168
169static int analog_cooked_read(struct analog_port *port)
170{
171 struct gameport *gameport = port->gameport;
172 ktime_t time[4], start, loop, now;
173 unsigned int loopout, timeout;
174 unsigned char data[4], this, last;
175 unsigned long flags;
176 int i, j;
177
178 loopout = (ANALOG_LOOP_TIME * port->loop) / 1000;
179 timeout = ANALOG_MAX_TIME * NSEC_PER_MSEC;
180
181 local_irq_save(flags);
182 gameport_trigger(gameport);
183 now = ktime_get();
184 local_irq_restore(flags);
185
186 start = now;
187 this = port->mask;
188 i = 0;
189
190 do {
191 loop = now;
192 last = this;
193
194 local_irq_disable();
195 this = gameport_read(gameport) & port->mask;
196 now = ktime_get();
197 local_irq_restore(flags);
198
199 if ((last ^ this) && (ktime_sub(now, loop) < loopout)) {
200 data[i] = last ^ this;
201 time[i] = now;
202 i++;
203 }
204
205 } while (this && (i < 4) && (ktime_sub(now, start) < timeout));
206
207 this <<= 4;
208
209 for (--i; i >= 0; i--) {
210 this |= data[i];
211 for (j = 0; j < 4; j++)
212 if (data[i] & (1 << j))
213 port->axes[j] = ((u32)ktime_sub(time[i], start) << ANALOG_FUZZ_BITS) / port->loop;
214 }
215
216 return -(this != port->mask);
217}
218
219static int analog_button_read(struct analog_port *port, char saitek, char chf)
220{
221 unsigned char u;
222 int t = 1, i = 0;
223 int strobe = gameport_time(port->gameport, ANALOG_SAITEK_TIME);
224
225 u = gameport_read(port->gameport);
226
227 if (!chf) {
228 port->buttons = (~u >> 4) & 0xf;
229 return 0;
230 }
231
232 port->buttons = 0;
233
234 while ((~u & 0xf0) && (i < 16) && t) {
235 port->buttons |= 1 << analog_chf[(~u >> 4) & 0xf];
236 if (!saitek) return 0;
237 udelay(ANALOG_SAITEK_DELAY);
238 t = strobe;
239 gameport_trigger(port->gameport);
240 while (((u = gameport_read(port->gameport)) & port->mask) && t) t--;
241 i++;
242 }
243
244 return -(!t || (i == 16));
245}
246
247
248
249
250
251static void analog_poll(struct gameport *gameport)
252{
253 struct analog_port *port = gameport_get_drvdata(gameport);
254 int i;
255
256 char saitek = !!(port->analog[0].mask & ANALOG_SAITEK);
257 char chf = !!(port->analog[0].mask & ANALOG_ANY_CHF);
258
259 if (port->cooked) {
260 port->bads -= gameport_cooked_read(port->gameport, port->axes, &port->buttons);
261 if (chf)
262 port->buttons = port->buttons ? (1 << analog_chf[port->buttons]) : 0;
263 port->reads++;
264 } else {
265 if (!port->axtime--) {
266 port->bads -= analog_cooked_read(port);
267 port->bads -= analog_button_read(port, saitek, chf);
268 port->reads++;
269 port->axtime = ANALOG_AXIS_TIME - 1;
270 } else {
271 if (!saitek)
272 analog_button_read(port, saitek, chf);
273 }
274 }
275
276 for (i = 0; i < 2; i++)
277 if (port->analog[i].mask)
278 analog_decode(port->analog + i, port->axes, port->initial, port->buttons);
279}
280
281
282
283
284
285static int analog_open(struct input_dev *dev)
286{
287 struct analog_port *port = input_get_drvdata(dev);
288
289 gameport_start_polling(port->gameport);
290 return 0;
291}
292
293
294
295
296
297static void analog_close(struct input_dev *dev)
298{
299 struct analog_port *port = input_get_drvdata(dev);
300
301 gameport_stop_polling(port->gameport);
302}
303
304
305
306
307
308
309static void analog_calibrate_timer(struct analog_port *port)
310{
311 struct gameport *gameport = port->gameport;
312 unsigned int i, t, tx;
313 ktime_t t1, t2, t3;
314 unsigned long flags;
315
316 tx = ~0;
317
318 for (i = 0; i < 50; i++) {
319 local_irq_save(flags);
320 t1 = ktime_get();
321 for (t = 0; t < 50; t++) {
322 gameport_read(gameport);
323 t2 = ktime_get();
324 }
325 t3 = ktime_get();
326 local_irq_restore(flags);
327 udelay(i);
328 t = ktime_sub(t2, t1) - ktime_sub(t3, t2);
329 if (t < tx) tx = t;
330 }
331
332 port->loop = tx / 50;
333}
334
335
336
337
338
339static void analog_name(struct analog *analog)
340{
341 snprintf(analog->name, sizeof(analog->name), "Analog %d-axis %d-button",
342 hweight8(analog->mask & ANALOG_AXES_STD),
343 hweight8(analog->mask & ANALOG_BTNS_STD) + !!(analog->mask & ANALOG_BTNS_CHF) * 2 +
344 hweight16(analog->mask & ANALOG_BTNS_GAMEPAD) + !!(analog->mask & ANALOG_HBTN_CHF) * 4);
345
346 if (analog->mask & ANALOG_HATS_ALL)
347 snprintf(analog->name, sizeof(analog->name), "%s %d-hat",
348 analog->name, hweight16(analog->mask & ANALOG_HATS_ALL));
349
350 if (analog->mask & ANALOG_HAT_FCS)
351 strlcat(analog->name, " FCS", sizeof(analog->name));
352 if (analog->mask & ANALOG_ANY_CHF)
353 strlcat(analog->name, (analog->mask & ANALOG_SAITEK) ? " Saitek" : " CHF",
354 sizeof(analog->name));
355
356 strlcat(analog->name, (analog->mask & ANALOG_GAMEPAD) ? " gamepad": " joystick",
357 sizeof(analog->name));
358}
359
360
361
362
363
364static int analog_init_device(struct analog_port *port, struct analog *analog, int index)
365{
366 struct input_dev *input_dev;
367 int i, j, t, v, w, x, y, z;
368 int error;
369
370 analog_name(analog);
371 snprintf(analog->phys, sizeof(analog->phys),
372 "%s/input%d", port->gameport->phys, index);
373 analog->buttons = (analog->mask & ANALOG_GAMEPAD) ? analog_pad_btn : analog_joy_btn;
374
375 analog->dev = input_dev = input_allocate_device();
376 if (!input_dev)
377 return -ENOMEM;
378
379 input_dev->name = analog->name;
380 input_dev->phys = analog->phys;
381 input_dev->id.bustype = BUS_GAMEPORT;
382 input_dev->id.vendor = GAMEPORT_ID_VENDOR_ANALOG;
383 input_dev->id.product = analog->mask >> 4;
384 input_dev->id.version = 0x0100;
385 input_dev->dev.parent = &port->gameport->dev;
386
387 input_set_drvdata(input_dev, port);
388
389 input_dev->open = analog_open;
390 input_dev->close = analog_close;
391
392 input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
393
394 for (i = j = 0; i < 4; i++)
395 if (analog->mask & (1 << i)) {
396
397 t = analog_axes[j];
398 x = port->axes[i];
399 y = (port->axes[0] + port->axes[1]) >> 1;
400 z = y - port->axes[i];
401 z = z > 0 ? z : -z;
402 v = (x >> 3);
403 w = (x >> 3);
404
405 if ((i == 2 || i == 3) && (j == 2 || j == 3) && (z > (y >> 3)))
406 x = y;
407
408 if (analog->mask & ANALOG_SAITEK) {
409 if (i == 2) x = port->axes[i];
410 v = x - (x >> 2);
411 w = (x >> 4);
412 }
413
414 input_set_abs_params(input_dev, t, v, (x << 1) - v, port->fuzz, w);
415 j++;
416 }
417
418 for (i = j = 0; i < 3; i++)
419 if (analog->mask & analog_exts[i])
420 for (x = 0; x < 2; x++) {
421 t = analog_hats[j++];
422 input_set_abs_params(input_dev, t, -1, 1, 0, 0);
423 }
424
425 for (i = j = 0; i < 4; i++)
426 if (analog->mask & (0x10 << i))
427 set_bit(analog->buttons[j++], input_dev->keybit);
428
429 if (analog->mask & ANALOG_BTNS_CHF)
430 for (i = 0; i < 2; i++)
431 set_bit(analog->buttons[j++], input_dev->keybit);
432
433 if (analog->mask & ANALOG_HBTN_CHF)
434 for (i = 0; i < 4; i++)
435 set_bit(analog->buttons[j++], input_dev->keybit);
436
437 for (i = 0; i < 4; i++)
438 if (analog->mask & (ANALOG_BTN_TL << i))
439 set_bit(analog_pads[i], input_dev->keybit);
440
441 analog_decode(analog, port->axes, port->initial, port->buttons);
442
443 error = input_register_device(analog->dev);
444 if (error) {
445 input_free_device(analog->dev);
446 return error;
447 }
448
449 return 0;
450}
451
452
453
454
455
456static int analog_init_masks(struct analog_port *port)
457{
458 int i;
459 struct analog *analog = port->analog;
460 int max[4];
461
462 if (!port->mask)
463 return -1;
464
465 if ((port->mask & 3) != 3 && port->mask != 0xc) {
466 printk(KERN_WARNING "analog.c: Unknown joystick device found "
467 "(data=%#x, %s), probably not analog joystick.\n",
468 port->mask, port->gameport->phys);
469 return -1;
470 }
471
472
473 i = analog_options[0];
474
475 analog[0].mask = i & 0xfffff;
476
477 analog[0].mask &= ~(ANALOG_AXES_STD | ANALOG_HAT_FCS | ANALOG_BTNS_GAMEPAD)
478 | port->mask | ((port->mask << 8) & ANALOG_HAT_FCS)
479 | ((port->mask << 10) & ANALOG_BTNS_TLR) | ((port->mask << 12) & ANALOG_BTNS_TLR2);
480
481 analog[0].mask &= ~(ANALOG_HAT2_CHF)
482 | ((analog[0].mask & ANALOG_HBTN_CHF) ? 0 : ANALOG_HAT2_CHF);
483
484 analog[0].mask &= ~(ANALOG_THROTTLE | ANALOG_BTN_TR | ANALOG_BTN_TR2)
485 | ((~analog[0].mask & ANALOG_HAT_FCS) >> 8)
486 | ((~analog[0].mask & ANALOG_HAT_FCS) << 2)
487 | ((~analog[0].mask & ANALOG_HAT_FCS) << 4);
488
489 analog[0].mask &= ~(ANALOG_THROTTLE | ANALOG_RUDDER)
490 | (((~analog[0].mask & ANALOG_BTNS_TLR ) >> 10)
491 & ((~analog[0].mask & ANALOG_BTNS_TLR2) >> 12));
492
493 analog[1].mask = ((i >> 20) & 0xff) | ((i >> 12) & 0xf0000);
494
495 analog[1].mask &= (analog[0].mask & ANALOG_EXTENSIONS) ? ANALOG_GAMEPAD
496 : (((ANALOG_BTNS_STD | port->mask) & ~analog[0].mask) | ANALOG_GAMEPAD);
497
498 if (port->cooked) {
499
500 for (i = 0; i < 4; i++) max[i] = port->axes[i] << 1;
501
502 if ((analog[0].mask & 0x7) == 0x7) max[2] = (max[0] + max[1]) >> 1;
503 if ((analog[0].mask & 0xb) == 0xb) max[3] = (max[0] + max[1]) >> 1;
504 if ((analog[0].mask & ANALOG_BTN_TL) && !(analog[0].mask & ANALOG_BTN_TL2)) max[2] >>= 1;
505 if ((analog[0].mask & ANALOG_BTN_TR) && !(analog[0].mask & ANALOG_BTN_TR2)) max[3] >>= 1;
506 if ((analog[0].mask & ANALOG_HAT_FCS)) max[3] >>= 1;
507
508 gameport_calibrate(port->gameport, port->axes, max);
509 }
510
511 for (i = 0; i < 4; i++)
512 port->initial[i] = port->axes[i];
513
514 return -!(analog[0].mask || analog[1].mask);
515}
516
517static int analog_init_port(struct gameport *gameport, struct gameport_driver *drv, struct analog_port *port)
518{
519 int i, t, u, v;
520
521 port->gameport = gameport;
522
523 gameport_set_drvdata(gameport, port);
524
525 if (!gameport_open(gameport, drv, GAMEPORT_MODE_RAW)) {
526
527 analog_calibrate_timer(port);
528
529 gameport_trigger(gameport);
530 t = gameport_read(gameport);
531 msleep(ANALOG_MAX_TIME);
532 port->mask = (gameport_read(gameport) ^ t) & t & 0xf;
533 port->fuzz = (NSEC_PER_MSEC * ANALOG_FUZZ_MAGIC) / port->loop / 1000 + ANALOG_FUZZ_BITS;
534
535 for (i = 0; i < ANALOG_INIT_RETRIES; i++) {
536 if (!analog_cooked_read(port))
537 break;
538 msleep(ANALOG_MAX_TIME);
539 }
540
541 u = v = 0;
542
543 msleep(ANALOG_MAX_TIME);
544 t = gameport_time(gameport, ANALOG_MAX_TIME * 1000);
545 gameport_trigger(gameport);
546 while ((gameport_read(port->gameport) & port->mask) && (u < t))
547 u++;
548 udelay(ANALOG_SAITEK_DELAY);
549 t = gameport_time(gameport, ANALOG_SAITEK_TIME);
550 gameport_trigger(gameport);
551 while ((gameport_read(port->gameport) & port->mask) && (v < t))
552 v++;
553
554 if (v < (u >> 1)) {
555 analog_options[0] |=
556 ANALOG_SAITEK | ANALOG_BTNS_CHF | ANALOG_HBTN_CHF | ANALOG_HAT1_CHF;
557 return 0;
558 }
559
560 gameport_close(gameport);
561 }
562
563 if (!gameport_open(gameport, drv, GAMEPORT_MODE_COOKED)) {
564
565 for (i = 0; i < ANALOG_INIT_RETRIES; i++)
566 if (!gameport_cooked_read(gameport, port->axes, &port->buttons))
567 break;
568 for (i = 0; i < 4; i++)
569 if (port->axes[i] != -1)
570 port->mask |= 1 << i;
571
572 port->fuzz = gameport->fuzz;
573 port->cooked = 1;
574 return 0;
575 }
576
577 return gameport_open(gameport, drv, GAMEPORT_MODE_RAW);
578}
579
580static int analog_connect(struct gameport *gameport, struct gameport_driver *drv)
581{
582 struct analog_port *port;
583 int i;
584 int err;
585
586 if (!(port = kzalloc(sizeof(struct analog_port), GFP_KERNEL)))
587 return -ENOMEM;
588
589 err = analog_init_port(gameport, drv, port);
590 if (err)
591 goto fail1;
592
593 err = analog_init_masks(port);
594 if (err)
595 goto fail2;
596
597 gameport_set_poll_handler(gameport, analog_poll);
598 gameport_set_poll_interval(gameport, 10);
599
600 for (i = 0; i < 2; i++)
601 if (port->analog[i].mask) {
602 err = analog_init_device(port, port->analog + i, i);
603 if (err)
604 goto fail3;
605 }
606
607 return 0;
608
609 fail3: while (--i >= 0)
610 if (port->analog[i].mask)
611 input_unregister_device(port->analog[i].dev);
612 fail2: gameport_close(gameport);
613 fail1: gameport_set_drvdata(gameport, NULL);
614 kfree(port);
615 return err;
616}
617
618static void analog_disconnect(struct gameport *gameport)
619{
620 struct analog_port *port = gameport_get_drvdata(gameport);
621 int i;
622
623 for (i = 0; i < 2; i++)
624 if (port->analog[i].mask)
625 input_unregister_device(port->analog[i].dev);
626 gameport_close(gameport);
627 gameport_set_drvdata(gameport, NULL);
628 printk(KERN_INFO "analog.c: %d out of %d reads (%d%%) on %s failed\n",
629 port->bads, port->reads, port->reads ? (port->bads * 100 / port->reads) : 0,
630 port->gameport->phys);
631 kfree(port);
632}
633
634struct analog_types {
635 char *name;
636 int value;
637};
638
639static struct analog_types analog_types[] = {
640 { "none", 0x00000000 },
641 { "auto", 0x000000ff },
642 { "2btn", 0x0000003f },
643 { "y-joy", 0x0cc00033 },
644 { "y-pad", 0x8cc80033 },
645 { "fcs", 0x000008f7 },
646 { "chf", 0x000002ff },
647 { "fullchf", 0x000007ff },
648 { "gamepad", 0x000830f3 },
649 { "gamepad8", 0x0008f0f3 },
650 { NULL, 0 }
651};
652
653static void analog_parse_options(void)
654{
655 int i, j;
656 char *end;
657
658 for (i = 0; i < js_nargs; i++) {
659
660 for (j = 0; analog_types[j].name; j++)
661 if (!strcmp(analog_types[j].name, js[i])) {
662 analog_options[i] = analog_types[j].value;
663 break;
664 }
665 if (analog_types[j].name) continue;
666
667 analog_options[i] = simple_strtoul(js[i], &end, 0);
668 if (end != js[i]) continue;
669
670 analog_options[i] = 0xff;
671 if (!strlen(js[i])) continue;
672
673 printk(KERN_WARNING "analog.c: Bad config for port %d - \"%s\"\n", i, js[i]);
674 }
675
676 for (; i < ANALOG_PORTS; i++)
677 analog_options[i] = 0xff;
678}
679
680
681
682
683
684static struct gameport_driver analog_drv = {
685 .driver = {
686 .name = "analog",
687 },
688 .description = DRIVER_DESC,
689 .connect = analog_connect,
690 .disconnect = analog_disconnect,
691};
692
693static int __init analog_init(void)
694{
695 analog_parse_options();
696 return gameport_register_driver(&analog_drv);
697}
698
699static void __exit analog_exit(void)
700{
701 gameport_unregister_driver(&analog_drv);
702}
703
704module_init(analog_init);
705module_exit(analog_exit);
706
