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1/*
2 * Copyright (c) 1996-2001 Vojtech Pavlik
3 */
4
5/*
6 * Analog joystick and gamepad 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>
33#include <linux/bitops.h>
34#include <linux/init.h>
35#include <linux/input.h>
36#include <linux/gameport.h>
37#include <linux/jiffies.h>
38#include <linux/timex.h>
39
40#define DRIVER_DESC "Analog joystick and gamepad driver"
41
42MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
43MODULE_DESCRIPTION(DRIVER_DESC);
44MODULE_LICENSE("GPL");
45
46/*
47 * Option parsing.
48 */
49
50#define ANALOG_PORTS 16
51
52static char *js[ANALOG_PORTS];
53static unsigned int js_nargs;
54static int analog_options[ANALOG_PORTS];
55module_param_array_named(map, js, charp, &js_nargs, 0);
56MODULE_PARM_DESC(map, "Describes analog joysticks type/capabilities");
57
58/*
59 * Times, feature definitions.
60 */
61
62#define ANALOG_RUDDER 0x00004
63#define ANALOG_THROTTLE 0x00008
64#define ANALOG_AXES_STD 0x0000f
65#define ANALOG_BTNS_STD 0x000f0
66
67#define ANALOG_BTNS_CHF 0x00100
68#define ANALOG_HAT1_CHF 0x00200
69#define ANALOG_HAT2_CHF 0x00400
70#define ANALOG_HAT_FCS 0x00800
71#define ANALOG_HATS_ALL 0x00e00
72#define ANALOG_BTN_TL 0x01000
73#define ANALOG_BTN_TR 0x02000
74#define ANALOG_BTN_TL2 0x04000
75#define ANALOG_BTN_TR2 0x08000
76#define ANALOG_BTNS_TLR 0x03000
77#define ANALOG_BTNS_TLR2 0x0c000
78#define ANALOG_BTNS_GAMEPAD 0x0f000
79
80#define ANALOG_HBTN_CHF 0x10000
81#define ANALOG_ANY_CHF 0x10700
82#define ANALOG_SAITEK 0x20000
83#define ANALOG_EXTENSIONS 0x7ff00
84#define ANALOG_GAMEPAD 0x80000
85
86#define ANALOG_MAX_TIME 3 /* 3 ms */
87#define ANALOG_LOOP_TIME 2000 /* 2 * loop */
88#define ANALOG_SAITEK_DELAY 200 /* 200 us */
89#define ANALOG_SAITEK_TIME 2000 /* 2000 us */
90#define ANALOG_AXIS_TIME 2 /* 2 * refresh */
91#define ANALOG_INIT_RETRIES 8 /* 8 times */
92#define ANALOG_FUZZ_BITS 2 /* 2 bit more */
93#define ANALOG_FUZZ_MAGIC 36 /* 36 u*ms/loop */
94
95#define ANALOG_MAX_NAME_LENGTH 128
96#define ANALOG_MAX_PHYS_LENGTH 32
97
98static short analog_axes[] = { ABS_X, ABS_Y, ABS_RUDDER, ABS_THROTTLE };
99static short analog_hats[] = { ABS_HAT0X, ABS_HAT0Y, ABS_HAT1X, ABS_HAT1Y, ABS_HAT2X, ABS_HAT2Y };
100static short analog_pads[] = { BTN_Y, BTN_Z, BTN_TL, BTN_TR };
101static short analog_exts[] = { ANALOG_HAT1_CHF, ANALOG_HAT2_CHF, ANALOG_HAT_FCS };
102static short analog_pad_btn[] = { BTN_A, BTN_B, BTN_C, BTN_X, BTN_TL2, BTN_TR2, BTN_SELECT, BTN_START, BTN_MODE, BTN_BASE };
103static short analog_joy_btn[] = { BTN_TRIGGER, BTN_THUMB, BTN_TOP, BTN_TOP2, BTN_BASE, BTN_BASE2,
104 BTN_BASE3, BTN_BASE4, BTN_BASE5, BTN_BASE6 };
105
106static unsigned char analog_chf[] = { 0xf, 0x0, 0x1, 0x9, 0x2, 0x4, 0xc, 0x8, 0x3, 0x5, 0xb, 0x7, 0xd, 0xe, 0xa, 0x6 };
107
108struct analog {
109 struct input_dev *dev;
110 int mask;
111 short *buttons;
112 char name[ANALOG_MAX_NAME_LENGTH];
113 char phys[ANALOG_MAX_PHYS_LENGTH];
114};
115
116struct analog_port {
117 struct gameport *gameport;
118 struct analog analog[2];
119 unsigned char mask;
120 char saitek;
121 char cooked;
122 int bads;
123 int reads;
124 int speed;
125 int loop;
126 int fuzz;
127 int axes[4];
128 int buttons;
129 int initial[4];
130 int axtime;
131};
132
133/*
134 * Time macros.
135 */
136
137#ifdef __i386__
138
139#include <linux/i8253.h>
140
141#define GET_TIME(x) do { if (cpu_has_tsc) rdtscl(x); else x = get_time_pit(); } while (0)
142#define DELTA(x,y) (cpu_has_tsc ? ((y) - (x)) : ((x) - (y) + ((x) < (y) ? PIT_TICK_RATE / HZ : 0)))
143#define TIME_NAME (cpu_has_tsc?"TSC":"PIT")
144static unsigned int get_time_pit(void)
145{
146 unsigned long flags;
147 unsigned int count;
148
149 raw_spin_lock_irqsave(&i8253_lock, flags);
150 outb_p(0x00, 0x43);
151 count = inb_p(0x40);
152 count |= inb_p(0x40) << 8;
153 raw_spin_unlock_irqrestore(&i8253_lock, flags);
154
155 return count;
156}
157#elif defined(__x86_64__)
158#define GET_TIME(x) rdtscl(x)
159#define DELTA(x,y) ((y)-(x))
160#define TIME_NAME "TSC"
161#elif defined(__alpha__)
162#define GET_TIME(x) do { x = get_cycles(); } while (0)
163#define DELTA(x,y) ((y)-(x))
164#define TIME_NAME "PCC"
165#elif defined(CONFIG_MN10300)
166#define GET_TIME(x) do { x = get_cycles(); } while (0)
167#define DELTA(x, y) ((x) - (y))
168#define TIME_NAME "TSC"
169#else
170#define FAKE_TIME
171static unsigned long analog_faketime = 0;
172#define GET_TIME(x) do { x = analog_faketime++; } while(0)
173#define DELTA(x,y) ((y)-(x))
174#define TIME_NAME "Unreliable"
175#warning Precise timer not defined for this architecture.
176#endif
177
178/*
179 * analog_decode() decodes analog joystick data and reports input events.
180 */
181
182static void analog_decode(struct analog *analog, int *axes, int *initial, int buttons)
183{
184 struct input_dev *dev = analog->dev;
185 int i, j;
186
187 if (analog->mask & ANALOG_HAT_FCS)
188 for (i = 0; i < 4; i++)
189 if (axes[3] < ((initial[3] * ((i << 1) + 1)) >> 3)) {
190 buttons |= 1 << (i + 14);
191 break;
192 }
193
194 for (i = j = 0; i < 6; i++)
195 if (analog->mask & (0x10 << i))
196 input_report_key(dev, analog->buttons[j++], (buttons >> i) & 1);
197
198 if (analog->mask & ANALOG_HBTN_CHF)
199 for (i = 0; i < 4; i++)
200 input_report_key(dev, analog->buttons[j++], (buttons >> (i + 10)) & 1);
201
202 if (analog->mask & ANALOG_BTN_TL)
203 input_report_key(dev, analog_pads[0], axes[2] < (initial[2] >> 1));
204 if (analog->mask & ANALOG_BTN_TR)
205 input_report_key(dev, analog_pads[1], axes[3] < (initial[3] >> 1));
206 if (analog->mask & ANALOG_BTN_TL2)
207 input_report_key(dev, analog_pads[2], axes[2] > (initial[2] + (initial[2] >> 1)));
208 if (analog->mask & ANALOG_BTN_TR2)
209 input_report_key(dev, analog_pads[3], axes[3] > (initial[3] + (initial[3] >> 1)));
210
211 for (i = j = 0; i < 4; i++)
212 if (analog->mask & (1 << i))
213 input_report_abs(dev, analog_axes[j++], axes[i]);
214
215 for (i = j = 0; i < 3; i++)
216 if (analog->mask & analog_exts[i]) {
217 input_report_abs(dev, analog_hats[j++],
218 ((buttons >> ((i << 2) + 7)) & 1) - ((buttons >> ((i << 2) + 9)) & 1));
219 input_report_abs(dev, analog_hats[j++],
220 ((buttons >> ((i << 2) + 8)) & 1) - ((buttons >> ((i << 2) + 6)) & 1));
221 }
222
223 input_sync(dev);
224}
225
226/*
227 * analog_cooked_read() reads analog joystick data.
228 */
229
230static int analog_cooked_read(struct analog_port *port)
231{
232 struct gameport *gameport = port->gameport;
233 unsigned int time[4], start, loop, now, loopout, timeout;
234 unsigned char data[4], this, last;
235 unsigned long flags;
236 int i, j;
237
238 loopout = (ANALOG_LOOP_TIME * port->loop) / 1000;
239 timeout = ANALOG_MAX_TIME * port->speed;
240
241 local_irq_save(flags);
242 gameport_trigger(gameport);
243 GET_TIME(now);
244 local_irq_restore(flags);
245
246 start = now;
247 this = port->mask;
248 i = 0;
249
250 do {
251 loop = now;
252 last = this;
253
254 local_irq_disable();
255 this = gameport_read(gameport) & port->mask;
256 GET_TIME(now);
257 local_irq_restore(flags);
258
259 if ((last ^ this) && (DELTA(loop, now) < loopout)) {
260 data[i] = last ^ this;
261 time[i] = now;
262 i++;
263 }
264
265 } while (this && (i < 4) && (DELTA(start, now) < timeout));
266
267 this <<= 4;
268
269 for (--i; i >= 0; i--) {
270 this |= data[i];
271 for (j = 0; j < 4; j++)
272 if (data[i] & (1 << j))
273 port->axes[j] = (DELTA(start, time[i]) << ANALOG_FUZZ_BITS) / port->loop;
274 }
275
276 return -(this != port->mask);
277}
278
279static int analog_button_read(struct analog_port *port, char saitek, char chf)
280{
281 unsigned char u;
282 int t = 1, i = 0;
283 int strobe = gameport_time(port->gameport, ANALOG_SAITEK_TIME);
284
285 u = gameport_read(port->gameport);
286
287 if (!chf) {
288 port->buttons = (~u >> 4) & 0xf;
289 return 0;
290 }
291
292 port->buttons = 0;
293
294 while ((~u & 0xf0) && (i < 16) && t) {
295 port->buttons |= 1 << analog_chf[(~u >> 4) & 0xf];
296 if (!saitek) return 0;
297 udelay(ANALOG_SAITEK_DELAY);
298 t = strobe;
299 gameport_trigger(port->gameport);
300 while (((u = gameport_read(port->gameport)) & port->mask) && t) t--;
301 i++;
302 }
303
304 return -(!t || (i == 16));
305}
306
307/*
308 * analog_poll() repeatedly polls the Analog joysticks.
309 */
310
311static void analog_poll(struct gameport *gameport)
312{
313 struct analog_port *port = gameport_get_drvdata(gameport);
314 int i;
315
316 char saitek = !!(port->analog[0].mask & ANALOG_SAITEK);
317 char chf = !!(port->analog[0].mask & ANALOG_ANY_CHF);
318
319 if (port->cooked) {
320 port->bads -= gameport_cooked_read(port->gameport, port->axes, &port->buttons);
321 if (chf)
322 port->buttons = port->buttons ? (1 << analog_chf[port->buttons]) : 0;
323 port->reads++;
324 } else {
325 if (!port->axtime--) {
326 port->bads -= analog_cooked_read(port);
327 port->bads -= analog_button_read(port, saitek, chf);
328 port->reads++;
329 port->axtime = ANALOG_AXIS_TIME - 1;
330 } else {
331 if (!saitek)
332 analog_button_read(port, saitek, chf);
333 }
334 }
335
336 for (i = 0; i < 2; i++)
337 if (port->analog[i].mask)
338 analog_decode(port->analog + i, port->axes, port->initial, port->buttons);
339}
340
341/*
342 * analog_open() is a callback from the input open routine.
343 */
344
345static int analog_open(struct input_dev *dev)
346{
347 struct analog_port *port = input_get_drvdata(dev);
348
349 gameport_start_polling(port->gameport);
350 return 0;
351}
352
353/*
354 * analog_close() is a callback from the input close routine.
355 */
356
357static void analog_close(struct input_dev *dev)
358{
359 struct analog_port *port = input_get_drvdata(dev);
360
361 gameport_stop_polling(port->gameport);
362}
363
364/*
365 * analog_calibrate_timer() calibrates the timer and computes loop
366 * and timeout values for a joystick port.
367 */
368
369static void analog_calibrate_timer(struct analog_port *port)
370{
371 struct gameport *gameport = port->gameport;
372 unsigned int i, t, tx, t1, t2, t3;
373 unsigned long flags;
374
375 local_irq_save(flags);
376 GET_TIME(t1);
377#ifdef FAKE_TIME
378 analog_faketime += 830;
379#endif
380 mdelay(1);
381 GET_TIME(t2);
382 GET_TIME(t3);
383 local_irq_restore(flags);
384
385 port->speed = DELTA(t1, t2) - DELTA(t2, t3);
386
387 tx = ~0;
388
389 for (i = 0; i < 50; i++) {
390 local_irq_save(flags);
391 GET_TIME(t1);
392 for (t = 0; t < 50; t++) { gameport_read(gameport); GET_TIME(t2); }
393 GET_TIME(t3);
394 local_irq_restore(flags);
395 udelay(i);
396 t = DELTA(t1, t2) - DELTA(t2, t3);
397 if (t < tx) tx = t;
398 }
399
400 port->loop = tx / 50;
401}
402
403/*
404 * analog_name() constructs a name for an analog joystick.
405 */
406
407static void analog_name(struct analog *analog)
408{
409 snprintf(analog->name, sizeof(analog->name), "Analog %d-axis %d-button",
410 hweight8(analog->mask & ANALOG_AXES_STD),
411 hweight8(analog->mask & ANALOG_BTNS_STD) + !!(analog->mask & ANALOG_BTNS_CHF) * 2 +
412 hweight16(analog->mask & ANALOG_BTNS_GAMEPAD) + !!(analog->mask & ANALOG_HBTN_CHF) * 4);
413
414 if (analog->mask & ANALOG_HATS_ALL)
415 snprintf(analog->name, sizeof(analog->name), "%s %d-hat",
416 analog->name, hweight16(analog->mask & ANALOG_HATS_ALL));
417
418 if (analog->mask & ANALOG_HAT_FCS)
419 strlcat(analog->name, " FCS", sizeof(analog->name));
420 if (analog->mask & ANALOG_ANY_CHF)
421 strlcat(analog->name, (analog->mask & ANALOG_SAITEK) ? " Saitek" : " CHF",
422 sizeof(analog->name));
423
424 strlcat(analog->name, (analog->mask & ANALOG_GAMEPAD) ? " gamepad": " joystick",
425 sizeof(analog->name));
426}
427
428/*
429 * analog_init_device()
430 */
431
432static int analog_init_device(struct analog_port *port, struct analog *analog, int index)
433{
434 struct input_dev *input_dev;
435 int i, j, t, v, w, x, y, z;
436 int error;
437
438 analog_name(analog);
439 snprintf(analog->phys, sizeof(analog->phys),
440 "%s/input%d", port->gameport->phys, index);
441 analog->buttons = (analog->mask & ANALOG_GAMEPAD) ? analog_pad_btn : analog_joy_btn;
442
443 analog->dev = input_dev = input_allocate_device();
444 if (!input_dev)
445 return -ENOMEM;
446
447 input_dev->name = analog->name;
448 input_dev->phys = analog->phys;
449 input_dev->id.bustype = BUS_GAMEPORT;
450 input_dev->id.vendor = GAMEPORT_ID_VENDOR_ANALOG;
451 input_dev->id.product = analog->mask >> 4;
452 input_dev->id.version = 0x0100;
453 input_dev->dev.parent = &port->gameport->dev;
454
455 input_set_drvdata(input_dev, port);
456
457 input_dev->open = analog_open;
458 input_dev->close = analog_close;
459
460 input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
461
462 for (i = j = 0; i < 4; i++)
463 if (analog->mask & (1 << i)) {
464
465 t = analog_axes[j];
466 x = port->axes[i];
467 y = (port->axes[0] + port->axes[1]) >> 1;
468 z = y - port->axes[i];
469 z = z > 0 ? z : -z;
470 v = (x >> 3);
471 w = (x >> 3);
472
473 if ((i == 2 || i == 3) && (j == 2 || j == 3) && (z > (y >> 3)))
474 x = y;
475
476 if (analog->mask & ANALOG_SAITEK) {
477 if (i == 2) x = port->axes[i];
478 v = x - (x >> 2);
479 w = (x >> 4);
480 }
481
482 input_set_abs_params(input_dev, t, v, (x << 1) - v, port->fuzz, w);
483 j++;
484 }
485
486 for (i = j = 0; i < 3; i++)
487 if (analog->mask & analog_exts[i])
488 for (x = 0; x < 2; x++) {
489 t = analog_hats[j++];
490 input_set_abs_params(input_dev, t, -1, 1, 0, 0);
491 }
492
493 for (i = j = 0; i < 4; i++)
494 if (analog->mask & (0x10 << i))
495 set_bit(analog->buttons[j++], input_dev->keybit);
496
497 if (analog->mask & ANALOG_BTNS_CHF)
498 for (i = 0; i < 2; i++)
499 set_bit(analog->buttons[j++], input_dev->keybit);
500
501 if (analog->mask & ANALOG_HBTN_CHF)
502 for (i = 0; i < 4; i++)
503 set_bit(analog->buttons[j++], input_dev->keybit);
504
505 for (i = 0; i < 4; i++)
506 if (analog->mask & (ANALOG_BTN_TL << i))
507 set_bit(analog_pads[i], input_dev->keybit);
508
509 analog_decode(analog, port->axes, port->initial, port->buttons);
510
511 error = input_register_device(analog->dev);
512 if (error) {
513 input_free_device(analog->dev);
514 return error;
515 }
516
517 return 0;
518}
519
520/*
521 * analog_init_devices() sets up device-specific values and registers the input devices.
522 */
523
524static int analog_init_masks(struct analog_port *port)
525{
526 int i;
527 struct analog *analog = port->analog;
528 int max[4];
529
530 if (!port->mask)
531 return -1;
532
533 if ((port->mask & 3) != 3 && port->mask != 0xc) {
534 printk(KERN_WARNING "analog.c: Unknown joystick device found "
535 "(data=%#x, %s), probably not analog joystick.\n",
536 port->mask, port->gameport->phys);
537 return -1;
538 }
539
540
541 i = analog_options[0]; /* FIXME !!! - need to specify options for different ports */
542
543 analog[0].mask = i & 0xfffff;
544
545 analog[0].mask &= ~(ANALOG_AXES_STD | ANALOG_HAT_FCS | ANALOG_BTNS_GAMEPAD)
546 | port->mask | ((port->mask << 8) & ANALOG_HAT_FCS)
547 | ((port->mask << 10) & ANALOG_BTNS_TLR) | ((port->mask << 12) & ANALOG_BTNS_TLR2);
548
549 analog[0].mask &= ~(ANALOG_HAT2_CHF)
550 | ((analog[0].mask & ANALOG_HBTN_CHF) ? 0 : ANALOG_HAT2_CHF);
551
552 analog[0].mask &= ~(ANALOG_THROTTLE | ANALOG_BTN_TR | ANALOG_BTN_TR2)
553 | ((~analog[0].mask & ANALOG_HAT_FCS) >> 8)
554 | ((~analog[0].mask & ANALOG_HAT_FCS) << 2)
555 | ((~analog[0].mask & ANALOG_HAT_FCS) << 4);
556
557 analog[0].mask &= ~(ANALOG_THROTTLE | ANALOG_RUDDER)
558 | (((~analog[0].mask & ANALOG_BTNS_TLR ) >> 10)
559 & ((~analog[0].mask & ANALOG_BTNS_TLR2) >> 12));
560
561 analog[1].mask = ((i >> 20) & 0xff) | ((i >> 12) & 0xf0000);
562
563 analog[1].mask &= (analog[0].mask & ANALOG_EXTENSIONS) ? ANALOG_GAMEPAD
564 : (((ANALOG_BTNS_STD | port->mask) & ~analog[0].mask) | ANALOG_GAMEPAD);
565
566 if (port->cooked) {
567
568 for (i = 0; i < 4; i++) max[i] = port->axes[i] << 1;
569
570 if ((analog[0].mask & 0x7) == 0x7) max[2] = (max[0] + max[1]) >> 1;
571 if ((analog[0].mask & 0xb) == 0xb) max[3] = (max[0] + max[1]) >> 1;
572 if ((analog[0].mask & ANALOG_BTN_TL) && !(analog[0].mask & ANALOG_BTN_TL2)) max[2] >>= 1;
573 if ((analog[0].mask & ANALOG_BTN_TR) && !(analog[0].mask & ANALOG_BTN_TR2)) max[3] >>= 1;
574 if ((analog[0].mask & ANALOG_HAT_FCS)) max[3] >>= 1;
575
576 gameport_calibrate(port->gameport, port->axes, max);
577 }
578
579 for (i = 0; i < 4; i++)
580 port->initial[i] = port->axes[i];
581
582 return -!(analog[0].mask || analog[1].mask);
583}
584
585static int analog_init_port(struct gameport *gameport, struct gameport_driver *drv, struct analog_port *port)
586{
587 int i, t, u, v;
588
589 port->gameport = gameport;
590
591 gameport_set_drvdata(gameport, port);
592
593 if (!gameport_open(gameport, drv, GAMEPORT_MODE_RAW)) {
594
595 analog_calibrate_timer(port);
596
597 gameport_trigger(gameport);
598 t = gameport_read(gameport);
599 msleep(ANALOG_MAX_TIME);
600 port->mask = (gameport_read(gameport) ^ t) & t & 0xf;
601 port->fuzz = (port->speed * ANALOG_FUZZ_MAGIC) / port->loop / 1000 + ANALOG_FUZZ_BITS;
602
603 for (i = 0; i < ANALOG_INIT_RETRIES; i++) {
604 if (!analog_cooked_read(port))
605 break;
606 msleep(ANALOG_MAX_TIME);
607 }
608
609 u = v = 0;
610
611 msleep(ANALOG_MAX_TIME);
612 t = gameport_time(gameport, ANALOG_MAX_TIME * 1000);
613 gameport_trigger(gameport);
614 while ((gameport_read(port->gameport) & port->mask) && (u < t))
615 u++;
616 udelay(ANALOG_SAITEK_DELAY);
617 t = gameport_time(gameport, ANALOG_SAITEK_TIME);
618 gameport_trigger(gameport);
619 while ((gameport_read(port->gameport) & port->mask) && (v < t))
620 v++;
621
622 if (v < (u >> 1)) { /* FIXME - more than one port */
623 analog_options[0] |= /* FIXME - more than one port */
624 ANALOG_SAITEK | ANALOG_BTNS_CHF | ANALOG_HBTN_CHF | ANALOG_HAT1_CHF;
625 return 0;
626 }
627
628 gameport_close(gameport);
629 }
630
631 if (!gameport_open(gameport, drv, GAMEPORT_MODE_COOKED)) {
632
633 for (i = 0; i < ANALOG_INIT_RETRIES; i++)
634 if (!gameport_cooked_read(gameport, port->axes, &port->buttons))
635 break;
636 for (i = 0; i < 4; i++)
637 if (port->axes[i] != -1)
638 port->mask |= 1 << i;
639
640 port->fuzz = gameport->fuzz;
641 port->cooked = 1;
642 return 0;
643 }
644
645 return gameport_open(gameport, drv, GAMEPORT_MODE_RAW);
646}
647
648static int analog_connect(struct gameport *gameport, struct gameport_driver *drv)
649{
650 struct analog_port *port;
651 int i;
652 int err;
653
654 if (!(port = kzalloc(sizeof(struct analog_port), GFP_KERNEL)))
655 return - ENOMEM;
656
657 err = analog_init_port(gameport, drv, port);
658 if (err)
659 goto fail1;
660
661 err = analog_init_masks(port);
662 if (err)
663 goto fail2;
664
665 gameport_set_poll_handler(gameport, analog_poll);
666 gameport_set_poll_interval(gameport, 10);
667
668 for (i = 0; i < 2; i++)
669 if (port->analog[i].mask) {
670 err = analog_init_device(port, port->analog + i, i);
671 if (err)
672 goto fail3;
673 }
674
675 return 0;
676
677 fail3: while (--i >= 0)
678 if (port->analog[i].mask)
679 input_unregister_device(port->analog[i].dev);
680 fail2: gameport_close(gameport);
681 fail1: gameport_set_drvdata(gameport, NULL);
682 kfree(port);
683 return err;
684}
685
686static void analog_disconnect(struct gameport *gameport)
687{
688 struct analog_port *port = gameport_get_drvdata(gameport);
689 int i;
690
691 for (i = 0; i < 2; i++)
692 if (port->analog[i].mask)
693 input_unregister_device(port->analog[i].dev);
694 gameport_close(gameport);
695 gameport_set_drvdata(gameport, NULL);
696 printk(KERN_INFO "analog.c: %d out of %d reads (%d%%) on %s failed\n",
697 port->bads, port->reads, port->reads ? (port->bads * 100 / port->reads) : 0,
698 port->gameport->phys);
699 kfree(port);
700}
701
702struct analog_types {
703 char *name;
704 int value;
705};
706
707static struct analog_types analog_types[] = {
708 { "none", 0x00000000 },
709 { "auto", 0x000000ff },
710 { "2btn", 0x0000003f },
711 { "y-joy", 0x0cc00033 },
712 { "y-pad", 0x8cc80033 },
713 { "fcs", 0x000008f7 },
714 { "chf", 0x000002ff },
715 { "fullchf", 0x000007ff },
716 { "gamepad", 0x000830f3 },
717 { "gamepad8", 0x0008f0f3 },
718 { NULL, 0 }
719};
720
721static void analog_parse_options(void)
722{
723 int i, j;
724 char *end;
725
726 for (i = 0; i < js_nargs; i++) {
727
728 for (j = 0; analog_types[j].name; j++)
729 if (!strcmp(analog_types[j].name, js[i])) {
730 analog_options[i] = analog_types[j].value;
731 break;
732 }
733 if (analog_types[j].name) continue;
734
735 analog_options[i] = simple_strtoul(js[i], &end, 0);
736 if (end != js[i]) continue;
737
738 analog_options[i] = 0xff;
739 if (!strlen(js[i])) continue;
740
741 printk(KERN_WARNING "analog.c: Bad config for port %d - \"%s\"\n", i, js[i]);
742 }
743
744 for (; i < ANALOG_PORTS; i++)
745 analog_options[i] = 0xff;
746}
747
748/*
749 * The gameport device structure.
750 */
751
752static struct gameport_driver analog_drv = {
753 .driver = {
754 .name = "analog",
755 },
756 .description = DRIVER_DESC,
757 .connect = analog_connect,
758 .disconnect = analog_disconnect,
759};
760
761static int __init analog_init(void)
762{
763 analog_parse_options();
764 return gameport_register_driver(&analog_drv);
765}
766
767static void __exit analog_exit(void)
768{
769 gameport_unregister_driver(&analog_drv);
770}
771
772module_init(analog_init);
773module_exit(analog_exit);
1/*
2 * Copyright (c) 1996-2001 Vojtech Pavlik
3 */
4
5/*
6 * Analog joystick and gamepad 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>
33#include <linux/bitops.h>
34#include <linux/init.h>
35#include <linux/input.h>
36#include <linux/gameport.h>
37#include <linux/jiffies.h>
38#include <linux/timex.h>
39
40#define DRIVER_DESC "Analog joystick and gamepad driver"
41
42MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
43MODULE_DESCRIPTION(DRIVER_DESC);
44MODULE_LICENSE("GPL");
45
46/*
47 * Option parsing.
48 */
49
50#define ANALOG_PORTS 16
51
52static char *js[ANALOG_PORTS];
53static unsigned int js_nargs;
54static int analog_options[ANALOG_PORTS];
55module_param_array_named(map, js, charp, &js_nargs, 0);
56MODULE_PARM_DESC(map, "Describes analog joysticks type/capabilities");
57
58/*
59 * Times, feature definitions.
60 */
61
62#define ANALOG_RUDDER 0x00004
63#define ANALOG_THROTTLE 0x00008
64#define ANALOG_AXES_STD 0x0000f
65#define ANALOG_BTNS_STD 0x000f0
66
67#define ANALOG_BTNS_CHF 0x00100
68#define ANALOG_HAT1_CHF 0x00200
69#define ANALOG_HAT2_CHF 0x00400
70#define ANALOG_HAT_FCS 0x00800
71#define ANALOG_HATS_ALL 0x00e00
72#define ANALOG_BTN_TL 0x01000
73#define ANALOG_BTN_TR 0x02000
74#define ANALOG_BTN_TL2 0x04000
75#define ANALOG_BTN_TR2 0x08000
76#define ANALOG_BTNS_TLR 0x03000
77#define ANALOG_BTNS_TLR2 0x0c000
78#define ANALOG_BTNS_GAMEPAD 0x0f000
79
80#define ANALOG_HBTN_CHF 0x10000
81#define ANALOG_ANY_CHF 0x10700
82#define ANALOG_SAITEK 0x20000
83#define ANALOG_EXTENSIONS 0x7ff00
84#define ANALOG_GAMEPAD 0x80000
85
86#define ANALOG_MAX_TIME 3 /* 3 ms */
87#define ANALOG_LOOP_TIME 2000 /* 2 * loop */
88#define ANALOG_SAITEK_DELAY 200 /* 200 us */
89#define ANALOG_SAITEK_TIME 2000 /* 2000 us */
90#define ANALOG_AXIS_TIME 2 /* 2 * refresh */
91#define ANALOG_INIT_RETRIES 8 /* 8 times */
92#define ANALOG_FUZZ_BITS 2 /* 2 bit more */
93#define ANALOG_FUZZ_MAGIC 36 /* 36 u*ms/loop */
94
95#define ANALOG_MAX_NAME_LENGTH 128
96#define ANALOG_MAX_PHYS_LENGTH 32
97
98static short analog_axes[] = { ABS_X, ABS_Y, ABS_RUDDER, ABS_THROTTLE };
99static short analog_hats[] = { ABS_HAT0X, ABS_HAT0Y, ABS_HAT1X, ABS_HAT1Y, ABS_HAT2X, ABS_HAT2Y };
100static short analog_pads[] = { BTN_Y, BTN_Z, BTN_TL, BTN_TR };
101static short analog_exts[] = { ANALOG_HAT1_CHF, ANALOG_HAT2_CHF, ANALOG_HAT_FCS };
102static short analog_pad_btn[] = { BTN_A, BTN_B, BTN_C, BTN_X, BTN_TL2, BTN_TR2, BTN_SELECT, BTN_START, BTN_MODE, BTN_BASE };
103static short analog_joy_btn[] = { BTN_TRIGGER, BTN_THUMB, BTN_TOP, BTN_TOP2, BTN_BASE, BTN_BASE2,
104 BTN_BASE3, BTN_BASE4, BTN_BASE5, BTN_BASE6 };
105
106static unsigned char analog_chf[] = { 0xf, 0x0, 0x1, 0x9, 0x2, 0x4, 0xc, 0x8, 0x3, 0x5, 0xb, 0x7, 0xd, 0xe, 0xa, 0x6 };
107
108struct analog {
109 struct input_dev *dev;
110 int mask;
111 short *buttons;
112 char name[ANALOG_MAX_NAME_LENGTH];
113 char phys[ANALOG_MAX_PHYS_LENGTH];
114};
115
116struct analog_port {
117 struct gameport *gameport;
118 struct analog analog[2];
119 unsigned char mask;
120 char saitek;
121 char cooked;
122 int bads;
123 int reads;
124 int speed;
125 int loop;
126 int fuzz;
127 int axes[4];
128 int buttons;
129 int initial[4];
130 int axtime;
131};
132
133/*
134 * Time macros.
135 */
136
137#ifdef __i386__
138
139#include <linux/i8253.h>
140
141#define GET_TIME(x) do { if (cpu_has_tsc) rdtscl(x); else x = get_time_pit(); } while (0)
142#define DELTA(x,y) (cpu_has_tsc ? ((y) - (x)) : ((x) - (y) + ((x) < (y) ? PIT_TICK_RATE / HZ : 0)))
143#define TIME_NAME (cpu_has_tsc?"TSC":"PIT")
144static unsigned int get_time_pit(void)
145{
146 unsigned long flags;
147 unsigned int count;
148
149 raw_spin_lock_irqsave(&i8253_lock, flags);
150 outb_p(0x00, 0x43);
151 count = inb_p(0x40);
152 count |= inb_p(0x40) << 8;
153 raw_spin_unlock_irqrestore(&i8253_lock, flags);
154
155 return count;
156}
157#elif defined(__x86_64__)
158#define GET_TIME(x) rdtscl(x)
159#define DELTA(x,y) ((y)-(x))
160#define TIME_NAME "TSC"
161#elif defined(__alpha__) || defined(CONFIG_MN10300) || defined(CONFIG_ARM) || defined(CONFIG_TILE)
162#define GET_TIME(x) do { x = get_cycles(); } while (0)
163#define DELTA(x,y) ((y)-(x))
164#define TIME_NAME "get_cycles"
165#else
166#define FAKE_TIME
167static unsigned long analog_faketime = 0;
168#define GET_TIME(x) do { x = analog_faketime++; } while(0)
169#define DELTA(x,y) ((y)-(x))
170#define TIME_NAME "Unreliable"
171#warning Precise timer not defined for this architecture.
172#endif
173
174/*
175 * analog_decode() decodes analog joystick data and reports input events.
176 */
177
178static void analog_decode(struct analog *analog, int *axes, int *initial, int buttons)
179{
180 struct input_dev *dev = analog->dev;
181 int i, j;
182
183 if (analog->mask & ANALOG_HAT_FCS)
184 for (i = 0; i < 4; i++)
185 if (axes[3] < ((initial[3] * ((i << 1) + 1)) >> 3)) {
186 buttons |= 1 << (i + 14);
187 break;
188 }
189
190 for (i = j = 0; i < 6; i++)
191 if (analog->mask & (0x10 << i))
192 input_report_key(dev, analog->buttons[j++], (buttons >> i) & 1);
193
194 if (analog->mask & ANALOG_HBTN_CHF)
195 for (i = 0; i < 4; i++)
196 input_report_key(dev, analog->buttons[j++], (buttons >> (i + 10)) & 1);
197
198 if (analog->mask & ANALOG_BTN_TL)
199 input_report_key(dev, analog_pads[0], axes[2] < (initial[2] >> 1));
200 if (analog->mask & ANALOG_BTN_TR)
201 input_report_key(dev, analog_pads[1], axes[3] < (initial[3] >> 1));
202 if (analog->mask & ANALOG_BTN_TL2)
203 input_report_key(dev, analog_pads[2], axes[2] > (initial[2] + (initial[2] >> 1)));
204 if (analog->mask & ANALOG_BTN_TR2)
205 input_report_key(dev, analog_pads[3], axes[3] > (initial[3] + (initial[3] >> 1)));
206
207 for (i = j = 0; i < 4; i++)
208 if (analog->mask & (1 << i))
209 input_report_abs(dev, analog_axes[j++], axes[i]);
210
211 for (i = j = 0; i < 3; i++)
212 if (analog->mask & analog_exts[i]) {
213 input_report_abs(dev, analog_hats[j++],
214 ((buttons >> ((i << 2) + 7)) & 1) - ((buttons >> ((i << 2) + 9)) & 1));
215 input_report_abs(dev, analog_hats[j++],
216 ((buttons >> ((i << 2) + 8)) & 1) - ((buttons >> ((i << 2) + 6)) & 1));
217 }
218
219 input_sync(dev);
220}
221
222/*
223 * analog_cooked_read() reads analog joystick data.
224 */
225
226static int analog_cooked_read(struct analog_port *port)
227{
228 struct gameport *gameport = port->gameport;
229 unsigned int time[4], start, loop, now, loopout, timeout;
230 unsigned char data[4], this, last;
231 unsigned long flags;
232 int i, j;
233
234 loopout = (ANALOG_LOOP_TIME * port->loop) / 1000;
235 timeout = ANALOG_MAX_TIME * port->speed;
236
237 local_irq_save(flags);
238 gameport_trigger(gameport);
239 GET_TIME(now);
240 local_irq_restore(flags);
241
242 start = now;
243 this = port->mask;
244 i = 0;
245
246 do {
247 loop = now;
248 last = this;
249
250 local_irq_disable();
251 this = gameport_read(gameport) & port->mask;
252 GET_TIME(now);
253 local_irq_restore(flags);
254
255 if ((last ^ this) && (DELTA(loop, now) < loopout)) {
256 data[i] = last ^ this;
257 time[i] = now;
258 i++;
259 }
260
261 } while (this && (i < 4) && (DELTA(start, now) < timeout));
262
263 this <<= 4;
264
265 for (--i; i >= 0; i--) {
266 this |= data[i];
267 for (j = 0; j < 4; j++)
268 if (data[i] & (1 << j))
269 port->axes[j] = (DELTA(start, time[i]) << ANALOG_FUZZ_BITS) / port->loop;
270 }
271
272 return -(this != port->mask);
273}
274
275static int analog_button_read(struct analog_port *port, char saitek, char chf)
276{
277 unsigned char u;
278 int t = 1, i = 0;
279 int strobe = gameport_time(port->gameport, ANALOG_SAITEK_TIME);
280
281 u = gameport_read(port->gameport);
282
283 if (!chf) {
284 port->buttons = (~u >> 4) & 0xf;
285 return 0;
286 }
287
288 port->buttons = 0;
289
290 while ((~u & 0xf0) && (i < 16) && t) {
291 port->buttons |= 1 << analog_chf[(~u >> 4) & 0xf];
292 if (!saitek) return 0;
293 udelay(ANALOG_SAITEK_DELAY);
294 t = strobe;
295 gameport_trigger(port->gameport);
296 while (((u = gameport_read(port->gameport)) & port->mask) && t) t--;
297 i++;
298 }
299
300 return -(!t || (i == 16));
301}
302
303/*
304 * analog_poll() repeatedly polls the Analog joysticks.
305 */
306
307static void analog_poll(struct gameport *gameport)
308{
309 struct analog_port *port = gameport_get_drvdata(gameport);
310 int i;
311
312 char saitek = !!(port->analog[0].mask & ANALOG_SAITEK);
313 char chf = !!(port->analog[0].mask & ANALOG_ANY_CHF);
314
315 if (port->cooked) {
316 port->bads -= gameport_cooked_read(port->gameport, port->axes, &port->buttons);
317 if (chf)
318 port->buttons = port->buttons ? (1 << analog_chf[port->buttons]) : 0;
319 port->reads++;
320 } else {
321 if (!port->axtime--) {
322 port->bads -= analog_cooked_read(port);
323 port->bads -= analog_button_read(port, saitek, chf);
324 port->reads++;
325 port->axtime = ANALOG_AXIS_TIME - 1;
326 } else {
327 if (!saitek)
328 analog_button_read(port, saitek, chf);
329 }
330 }
331
332 for (i = 0; i < 2; i++)
333 if (port->analog[i].mask)
334 analog_decode(port->analog + i, port->axes, port->initial, port->buttons);
335}
336
337/*
338 * analog_open() is a callback from the input open routine.
339 */
340
341static int analog_open(struct input_dev *dev)
342{
343 struct analog_port *port = input_get_drvdata(dev);
344
345 gameport_start_polling(port->gameport);
346 return 0;
347}
348
349/*
350 * analog_close() is a callback from the input close routine.
351 */
352
353static void analog_close(struct input_dev *dev)
354{
355 struct analog_port *port = input_get_drvdata(dev);
356
357 gameport_stop_polling(port->gameport);
358}
359
360/*
361 * analog_calibrate_timer() calibrates the timer and computes loop
362 * and timeout values for a joystick port.
363 */
364
365static void analog_calibrate_timer(struct analog_port *port)
366{
367 struct gameport *gameport = port->gameport;
368 unsigned int i, t, tx, t1, t2, t3;
369 unsigned long flags;
370
371 local_irq_save(flags);
372 GET_TIME(t1);
373#ifdef FAKE_TIME
374 analog_faketime += 830;
375#endif
376 mdelay(1);
377 GET_TIME(t2);
378 GET_TIME(t3);
379 local_irq_restore(flags);
380
381 port->speed = DELTA(t1, t2) - DELTA(t2, t3);
382
383 tx = ~0;
384
385 for (i = 0; i < 50; i++) {
386 local_irq_save(flags);
387 GET_TIME(t1);
388 for (t = 0; t < 50; t++) { gameport_read(gameport); GET_TIME(t2); }
389 GET_TIME(t3);
390 local_irq_restore(flags);
391 udelay(i);
392 t = DELTA(t1, t2) - DELTA(t2, t3);
393 if (t < tx) tx = t;
394 }
395
396 port->loop = tx / 50;
397}
398
399/*
400 * analog_name() constructs a name for an analog joystick.
401 */
402
403static void analog_name(struct analog *analog)
404{
405 snprintf(analog->name, sizeof(analog->name), "Analog %d-axis %d-button",
406 hweight8(analog->mask & ANALOG_AXES_STD),
407 hweight8(analog->mask & ANALOG_BTNS_STD) + !!(analog->mask & ANALOG_BTNS_CHF) * 2 +
408 hweight16(analog->mask & ANALOG_BTNS_GAMEPAD) + !!(analog->mask & ANALOG_HBTN_CHF) * 4);
409
410 if (analog->mask & ANALOG_HATS_ALL)
411 snprintf(analog->name, sizeof(analog->name), "%s %d-hat",
412 analog->name, hweight16(analog->mask & ANALOG_HATS_ALL));
413
414 if (analog->mask & ANALOG_HAT_FCS)
415 strlcat(analog->name, " FCS", sizeof(analog->name));
416 if (analog->mask & ANALOG_ANY_CHF)
417 strlcat(analog->name, (analog->mask & ANALOG_SAITEK) ? " Saitek" : " CHF",
418 sizeof(analog->name));
419
420 strlcat(analog->name, (analog->mask & ANALOG_GAMEPAD) ? " gamepad": " joystick",
421 sizeof(analog->name));
422}
423
424/*
425 * analog_init_device()
426 */
427
428static int analog_init_device(struct analog_port *port, struct analog *analog, int index)
429{
430 struct input_dev *input_dev;
431 int i, j, t, v, w, x, y, z;
432 int error;
433
434 analog_name(analog);
435 snprintf(analog->phys, sizeof(analog->phys),
436 "%s/input%d", port->gameport->phys, index);
437 analog->buttons = (analog->mask & ANALOG_GAMEPAD) ? analog_pad_btn : analog_joy_btn;
438
439 analog->dev = input_dev = input_allocate_device();
440 if (!input_dev)
441 return -ENOMEM;
442
443 input_dev->name = analog->name;
444 input_dev->phys = analog->phys;
445 input_dev->id.bustype = BUS_GAMEPORT;
446 input_dev->id.vendor = GAMEPORT_ID_VENDOR_ANALOG;
447 input_dev->id.product = analog->mask >> 4;
448 input_dev->id.version = 0x0100;
449 input_dev->dev.parent = &port->gameport->dev;
450
451 input_set_drvdata(input_dev, port);
452
453 input_dev->open = analog_open;
454 input_dev->close = analog_close;
455
456 input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
457
458 for (i = j = 0; i < 4; i++)
459 if (analog->mask & (1 << i)) {
460
461 t = analog_axes[j];
462 x = port->axes[i];
463 y = (port->axes[0] + port->axes[1]) >> 1;
464 z = y - port->axes[i];
465 z = z > 0 ? z : -z;
466 v = (x >> 3);
467 w = (x >> 3);
468
469 if ((i == 2 || i == 3) && (j == 2 || j == 3) && (z > (y >> 3)))
470 x = y;
471
472 if (analog->mask & ANALOG_SAITEK) {
473 if (i == 2) x = port->axes[i];
474 v = x - (x >> 2);
475 w = (x >> 4);
476 }
477
478 input_set_abs_params(input_dev, t, v, (x << 1) - v, port->fuzz, w);
479 j++;
480 }
481
482 for (i = j = 0; i < 3; i++)
483 if (analog->mask & analog_exts[i])
484 for (x = 0; x < 2; x++) {
485 t = analog_hats[j++];
486 input_set_abs_params(input_dev, t, -1, 1, 0, 0);
487 }
488
489 for (i = j = 0; i < 4; i++)
490 if (analog->mask & (0x10 << i))
491 set_bit(analog->buttons[j++], input_dev->keybit);
492
493 if (analog->mask & ANALOG_BTNS_CHF)
494 for (i = 0; i < 2; i++)
495 set_bit(analog->buttons[j++], input_dev->keybit);
496
497 if (analog->mask & ANALOG_HBTN_CHF)
498 for (i = 0; i < 4; i++)
499 set_bit(analog->buttons[j++], input_dev->keybit);
500
501 for (i = 0; i < 4; i++)
502 if (analog->mask & (ANALOG_BTN_TL << i))
503 set_bit(analog_pads[i], input_dev->keybit);
504
505 analog_decode(analog, port->axes, port->initial, port->buttons);
506
507 error = input_register_device(analog->dev);
508 if (error) {
509 input_free_device(analog->dev);
510 return error;
511 }
512
513 return 0;
514}
515
516/*
517 * analog_init_devices() sets up device-specific values and registers the input devices.
518 */
519
520static int analog_init_masks(struct analog_port *port)
521{
522 int i;
523 struct analog *analog = port->analog;
524 int max[4];
525
526 if (!port->mask)
527 return -1;
528
529 if ((port->mask & 3) != 3 && port->mask != 0xc) {
530 printk(KERN_WARNING "analog.c: Unknown joystick device found "
531 "(data=%#x, %s), probably not analog joystick.\n",
532 port->mask, port->gameport->phys);
533 return -1;
534 }
535
536
537 i = analog_options[0]; /* FIXME !!! - need to specify options for different ports */
538
539 analog[0].mask = i & 0xfffff;
540
541 analog[0].mask &= ~(ANALOG_AXES_STD | ANALOG_HAT_FCS | ANALOG_BTNS_GAMEPAD)
542 | port->mask | ((port->mask << 8) & ANALOG_HAT_FCS)
543 | ((port->mask << 10) & ANALOG_BTNS_TLR) | ((port->mask << 12) & ANALOG_BTNS_TLR2);
544
545 analog[0].mask &= ~(ANALOG_HAT2_CHF)
546 | ((analog[0].mask & ANALOG_HBTN_CHF) ? 0 : ANALOG_HAT2_CHF);
547
548 analog[0].mask &= ~(ANALOG_THROTTLE | ANALOG_BTN_TR | ANALOG_BTN_TR2)
549 | ((~analog[0].mask & ANALOG_HAT_FCS) >> 8)
550 | ((~analog[0].mask & ANALOG_HAT_FCS) << 2)
551 | ((~analog[0].mask & ANALOG_HAT_FCS) << 4);
552
553 analog[0].mask &= ~(ANALOG_THROTTLE | ANALOG_RUDDER)
554 | (((~analog[0].mask & ANALOG_BTNS_TLR ) >> 10)
555 & ((~analog[0].mask & ANALOG_BTNS_TLR2) >> 12));
556
557 analog[1].mask = ((i >> 20) & 0xff) | ((i >> 12) & 0xf0000);
558
559 analog[1].mask &= (analog[0].mask & ANALOG_EXTENSIONS) ? ANALOG_GAMEPAD
560 : (((ANALOG_BTNS_STD | port->mask) & ~analog[0].mask) | ANALOG_GAMEPAD);
561
562 if (port->cooked) {
563
564 for (i = 0; i < 4; i++) max[i] = port->axes[i] << 1;
565
566 if ((analog[0].mask & 0x7) == 0x7) max[2] = (max[0] + max[1]) >> 1;
567 if ((analog[0].mask & 0xb) == 0xb) max[3] = (max[0] + max[1]) >> 1;
568 if ((analog[0].mask & ANALOG_BTN_TL) && !(analog[0].mask & ANALOG_BTN_TL2)) max[2] >>= 1;
569 if ((analog[0].mask & ANALOG_BTN_TR) && !(analog[0].mask & ANALOG_BTN_TR2)) max[3] >>= 1;
570 if ((analog[0].mask & ANALOG_HAT_FCS)) max[3] >>= 1;
571
572 gameport_calibrate(port->gameport, port->axes, max);
573 }
574
575 for (i = 0; i < 4; i++)
576 port->initial[i] = port->axes[i];
577
578 return -!(analog[0].mask || analog[1].mask);
579}
580
581static int analog_init_port(struct gameport *gameport, struct gameport_driver *drv, struct analog_port *port)
582{
583 int i, t, u, v;
584
585 port->gameport = gameport;
586
587 gameport_set_drvdata(gameport, port);
588
589 if (!gameport_open(gameport, drv, GAMEPORT_MODE_RAW)) {
590
591 analog_calibrate_timer(port);
592
593 gameport_trigger(gameport);
594 t = gameport_read(gameport);
595 msleep(ANALOG_MAX_TIME);
596 port->mask = (gameport_read(gameport) ^ t) & t & 0xf;
597 port->fuzz = (port->speed * ANALOG_FUZZ_MAGIC) / port->loop / 1000 + ANALOG_FUZZ_BITS;
598
599 for (i = 0; i < ANALOG_INIT_RETRIES; i++) {
600 if (!analog_cooked_read(port))
601 break;
602 msleep(ANALOG_MAX_TIME);
603 }
604
605 u = v = 0;
606
607 msleep(ANALOG_MAX_TIME);
608 t = gameport_time(gameport, ANALOG_MAX_TIME * 1000);
609 gameport_trigger(gameport);
610 while ((gameport_read(port->gameport) & port->mask) && (u < t))
611 u++;
612 udelay(ANALOG_SAITEK_DELAY);
613 t = gameport_time(gameport, ANALOG_SAITEK_TIME);
614 gameport_trigger(gameport);
615 while ((gameport_read(port->gameport) & port->mask) && (v < t))
616 v++;
617
618 if (v < (u >> 1)) { /* FIXME - more than one port */
619 analog_options[0] |= /* FIXME - more than one port */
620 ANALOG_SAITEK | ANALOG_BTNS_CHF | ANALOG_HBTN_CHF | ANALOG_HAT1_CHF;
621 return 0;
622 }
623
624 gameport_close(gameport);
625 }
626
627 if (!gameport_open(gameport, drv, GAMEPORT_MODE_COOKED)) {
628
629 for (i = 0; i < ANALOG_INIT_RETRIES; i++)
630 if (!gameport_cooked_read(gameport, port->axes, &port->buttons))
631 break;
632 for (i = 0; i < 4; i++)
633 if (port->axes[i] != -1)
634 port->mask |= 1 << i;
635
636 port->fuzz = gameport->fuzz;
637 port->cooked = 1;
638 return 0;
639 }
640
641 return gameport_open(gameport, drv, GAMEPORT_MODE_RAW);
642}
643
644static int analog_connect(struct gameport *gameport, struct gameport_driver *drv)
645{
646 struct analog_port *port;
647 int i;
648 int err;
649
650 if (!(port = kzalloc(sizeof(struct analog_port), GFP_KERNEL)))
651 return - ENOMEM;
652
653 err = analog_init_port(gameport, drv, port);
654 if (err)
655 goto fail1;
656
657 err = analog_init_masks(port);
658 if (err)
659 goto fail2;
660
661 gameport_set_poll_handler(gameport, analog_poll);
662 gameport_set_poll_interval(gameport, 10);
663
664 for (i = 0; i < 2; i++)
665 if (port->analog[i].mask) {
666 err = analog_init_device(port, port->analog + i, i);
667 if (err)
668 goto fail3;
669 }
670
671 return 0;
672
673 fail3: while (--i >= 0)
674 if (port->analog[i].mask)
675 input_unregister_device(port->analog[i].dev);
676 fail2: gameport_close(gameport);
677 fail1: gameport_set_drvdata(gameport, NULL);
678 kfree(port);
679 return err;
680}
681
682static void analog_disconnect(struct gameport *gameport)
683{
684 struct analog_port *port = gameport_get_drvdata(gameport);
685 int i;
686
687 for (i = 0; i < 2; i++)
688 if (port->analog[i].mask)
689 input_unregister_device(port->analog[i].dev);
690 gameport_close(gameport);
691 gameport_set_drvdata(gameport, NULL);
692 printk(KERN_INFO "analog.c: %d out of %d reads (%d%%) on %s failed\n",
693 port->bads, port->reads, port->reads ? (port->bads * 100 / port->reads) : 0,
694 port->gameport->phys);
695 kfree(port);
696}
697
698struct analog_types {
699 char *name;
700 int value;
701};
702
703static struct analog_types analog_types[] = {
704 { "none", 0x00000000 },
705 { "auto", 0x000000ff },
706 { "2btn", 0x0000003f },
707 { "y-joy", 0x0cc00033 },
708 { "y-pad", 0x8cc80033 },
709 { "fcs", 0x000008f7 },
710 { "chf", 0x000002ff },
711 { "fullchf", 0x000007ff },
712 { "gamepad", 0x000830f3 },
713 { "gamepad8", 0x0008f0f3 },
714 { NULL, 0 }
715};
716
717static void analog_parse_options(void)
718{
719 int i, j;
720 char *end;
721
722 for (i = 0; i < js_nargs; i++) {
723
724 for (j = 0; analog_types[j].name; j++)
725 if (!strcmp(analog_types[j].name, js[i])) {
726 analog_options[i] = analog_types[j].value;
727 break;
728 }
729 if (analog_types[j].name) continue;
730
731 analog_options[i] = simple_strtoul(js[i], &end, 0);
732 if (end != js[i]) continue;
733
734 analog_options[i] = 0xff;
735 if (!strlen(js[i])) continue;
736
737 printk(KERN_WARNING "analog.c: Bad config for port %d - \"%s\"\n", i, js[i]);
738 }
739
740 for (; i < ANALOG_PORTS; i++)
741 analog_options[i] = 0xff;
742}
743
744/*
745 * The gameport device structure.
746 */
747
748static struct gameport_driver analog_drv = {
749 .driver = {
750 .name = "analog",
751 },
752 .description = DRIVER_DESC,
753 .connect = analog_connect,
754 .disconnect = analog_disconnect,
755};
756
757static int __init analog_init(void)
758{
759 analog_parse_options();
760 return gameport_register_driver(&analog_drv);
761}
762
763static void __exit analog_exit(void)
764{
765 gameport_unregister_driver(&analog_drv);
766}
767
768module_init(analog_init);
769module_exit(analog_exit);