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1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * Copyright (c) 1996-2001 Vojtech Pavlik
4 */
5
6/*
7 * Analog joystick and gamepad driver for Linux
8 */
9
10#include <linux/delay.h>
11#include <linux/kernel.h>
12#include <linux/module.h>
13#include <linux/slab.h>
14#include <linux/bitops.h>
15#include <linux/init.h>
16#include <linux/input.h>
17#include <linux/gameport.h>
18#include <linux/jiffies.h>
19#include <linux/seq_buf.h>
20#include <linux/timex.h>
21#include <linux/timekeeping.h>
22
23#define DRIVER_DESC "Analog joystick and gamepad driver"
24
25MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
26MODULE_DESCRIPTION(DRIVER_DESC);
27MODULE_LICENSE("GPL");
28
29/*
30 * Option parsing.
31 */
32
33#define ANALOG_PORTS 16
34
35static char *js[ANALOG_PORTS];
36static unsigned int js_nargs;
37static int analog_options[ANALOG_PORTS];
38module_param_array_named(map, js, charp, &js_nargs, 0);
39MODULE_PARM_DESC(map, "Describes analog joysticks type/capabilities");
40
41/*
42 * Times, feature definitions.
43 */
44
45#define ANALOG_RUDDER 0x00004
46#define ANALOG_THROTTLE 0x00008
47#define ANALOG_AXES_STD 0x0000f
48#define ANALOG_BTNS_STD 0x000f0
49
50#define ANALOG_BTNS_CHF 0x00100
51#define ANALOG_HAT1_CHF 0x00200
52#define ANALOG_HAT2_CHF 0x00400
53#define ANALOG_HAT_FCS 0x00800
54#define ANALOG_HATS_ALL 0x00e00
55#define ANALOG_BTN_TL 0x01000
56#define ANALOG_BTN_TR 0x02000
57#define ANALOG_BTN_TL2 0x04000
58#define ANALOG_BTN_TR2 0x08000
59#define ANALOG_BTNS_TLR 0x03000
60#define ANALOG_BTNS_TLR2 0x0c000
61#define ANALOG_BTNS_GAMEPAD 0x0f000
62
63#define ANALOG_HBTN_CHF 0x10000
64#define ANALOG_ANY_CHF 0x10700
65#define ANALOG_SAITEK 0x20000
66#define ANALOG_EXTENSIONS 0x7ff00
67#define ANALOG_GAMEPAD 0x80000
68
69#define ANALOG_MAX_TIME 3 /* 3 ms */
70#define ANALOG_LOOP_TIME 2000 /* 2 * loop */
71#define ANALOG_SAITEK_DELAY 200 /* 200 us */
72#define ANALOG_SAITEK_TIME 2000 /* 2000 us */
73#define ANALOG_AXIS_TIME 2 /* 2 * refresh */
74#define ANALOG_INIT_RETRIES 8 /* 8 times */
75#define ANALOG_FUZZ_BITS 2 /* 2 bit more */
76#define ANALOG_FUZZ_MAGIC 36 /* 36 u*ms/loop */
77
78#define ANALOG_MAX_NAME_LENGTH 128
79#define ANALOG_MAX_PHYS_LENGTH 32
80
81static short analog_axes[] = { ABS_X, ABS_Y, ABS_RUDDER, ABS_THROTTLE };
82static short analog_hats[] = { ABS_HAT0X, ABS_HAT0Y, ABS_HAT1X, ABS_HAT1Y, ABS_HAT2X, ABS_HAT2Y };
83static short analog_pads[] = { BTN_Y, BTN_Z, BTN_TL, BTN_TR };
84static short analog_exts[] = { ANALOG_HAT1_CHF, ANALOG_HAT2_CHF, ANALOG_HAT_FCS };
85static short analog_pad_btn[] = { BTN_A, BTN_B, BTN_C, BTN_X, BTN_TL2, BTN_TR2, BTN_SELECT, BTN_START, BTN_MODE, BTN_BASE };
86static short analog_joy_btn[] = { BTN_TRIGGER, BTN_THUMB, BTN_TOP, BTN_TOP2, BTN_BASE, BTN_BASE2,
87 BTN_BASE3, BTN_BASE4, BTN_BASE5, BTN_BASE6 };
88
89static unsigned char analog_chf[] = { 0xf, 0x0, 0x1, 0x9, 0x2, 0x4, 0xc, 0x8, 0x3, 0x5, 0xb, 0x7, 0xd, 0xe, 0xa, 0x6 };
90
91struct analog {
92 struct input_dev *dev;
93 int mask;
94 short *buttons;
95 char name[ANALOG_MAX_NAME_LENGTH];
96 char phys[ANALOG_MAX_PHYS_LENGTH];
97};
98
99struct analog_port {
100 struct gameport *gameport;
101 struct analog analog[2];
102 unsigned char mask;
103 char saitek;
104 char cooked;
105 int bads;
106 int reads;
107 int loop;
108 int fuzz;
109 int axes[4];
110 int buttons;
111 int initial[4];
112 int axtime;
113};
114
115/*
116 * analog_decode() decodes analog joystick data and reports input events.
117 */
118
119static void analog_decode(struct analog *analog, int *axes, int *initial, int buttons)
120{
121 struct input_dev *dev = analog->dev;
122 int i, j;
123
124 if (analog->mask & ANALOG_HAT_FCS)
125 for (i = 0; i < 4; i++)
126 if (axes[3] < ((initial[3] * ((i << 1) + 1)) >> 3)) {
127 buttons |= 1 << (i + 14);
128 break;
129 }
130
131 for (i = j = 0; i < 6; i++)
132 if (analog->mask & (0x10 << i))
133 input_report_key(dev, analog->buttons[j++], (buttons >> i) & 1);
134
135 if (analog->mask & ANALOG_HBTN_CHF)
136 for (i = 0; i < 4; i++)
137 input_report_key(dev, analog->buttons[j++], (buttons >> (i + 10)) & 1);
138
139 if (analog->mask & ANALOG_BTN_TL)
140 input_report_key(dev, analog_pads[0], axes[2] < (initial[2] >> 1));
141 if (analog->mask & ANALOG_BTN_TR)
142 input_report_key(dev, analog_pads[1], axes[3] < (initial[3] >> 1));
143 if (analog->mask & ANALOG_BTN_TL2)
144 input_report_key(dev, analog_pads[2], axes[2] > (initial[2] + (initial[2] >> 1)));
145 if (analog->mask & ANALOG_BTN_TR2)
146 input_report_key(dev, analog_pads[3], axes[3] > (initial[3] + (initial[3] >> 1)));
147
148 for (i = j = 0; i < 4; i++)
149 if (analog->mask & (1 << i))
150 input_report_abs(dev, analog_axes[j++], axes[i]);
151
152 for (i = j = 0; i < 3; i++)
153 if (analog->mask & analog_exts[i]) {
154 input_report_abs(dev, analog_hats[j++],
155 ((buttons >> ((i << 2) + 7)) & 1) - ((buttons >> ((i << 2) + 9)) & 1));
156 input_report_abs(dev, analog_hats[j++],
157 ((buttons >> ((i << 2) + 8)) & 1) - ((buttons >> ((i << 2) + 6)) & 1));
158 }
159
160 input_sync(dev);
161}
162
163/*
164 * analog_cooked_read() reads analog joystick data.
165 */
166
167static int analog_cooked_read(struct analog_port *port)
168{
169 struct gameport *gameport = port->gameport;
170 ktime_t time[4], start, loop, now;
171 unsigned int loopout, timeout;
172 unsigned char data[4], this, last;
173 unsigned long flags;
174 int i, j;
175
176 loopout = (ANALOG_LOOP_TIME * port->loop) / 1000;
177 timeout = ANALOG_MAX_TIME * NSEC_PER_MSEC;
178
179 local_irq_save(flags);
180 gameport_trigger(gameport);
181 now = ktime_get();
182 local_irq_restore(flags);
183
184 start = now;
185 this = port->mask;
186 i = 0;
187
188 do {
189 loop = now;
190 last = this;
191
192 local_irq_disable();
193 this = gameport_read(gameport) & port->mask;
194 now = ktime_get();
195 local_irq_restore(flags);
196
197 if ((last ^ this) && (ktime_sub(now, loop) < loopout)) {
198 data[i] = last ^ this;
199 time[i] = now;
200 i++;
201 }
202
203 } while (this && (i < 4) && (ktime_sub(now, start) < timeout));
204
205 this <<= 4;
206
207 for (--i; i >= 0; i--) {
208 this |= data[i];
209 for (j = 0; j < 4; j++)
210 if (data[i] & (1 << j))
211 port->axes[j] = ((u32)ktime_sub(time[i], start) << ANALOG_FUZZ_BITS) / port->loop;
212 }
213
214 return -(this != port->mask);
215}
216
217static int analog_button_read(struct analog_port *port, char saitek, char chf)
218{
219 unsigned char u;
220 int t = 1, i = 0;
221 int strobe = gameport_time(port->gameport, ANALOG_SAITEK_TIME);
222
223 u = gameport_read(port->gameport);
224
225 if (!chf) {
226 port->buttons = (~u >> 4) & 0xf;
227 return 0;
228 }
229
230 port->buttons = 0;
231
232 while ((~u & 0xf0) && (i < 16) && t) {
233 port->buttons |= 1 << analog_chf[(~u >> 4) & 0xf];
234 if (!saitek) return 0;
235 udelay(ANALOG_SAITEK_DELAY);
236 t = strobe;
237 gameport_trigger(port->gameport);
238 while (((u = gameport_read(port->gameport)) & port->mask) && t) t--;
239 i++;
240 }
241
242 return -(!t || (i == 16));
243}
244
245/*
246 * analog_poll() repeatedly polls the Analog joysticks.
247 */
248
249static void analog_poll(struct gameport *gameport)
250{
251 struct analog_port *port = gameport_get_drvdata(gameport);
252 int i;
253
254 char saitek = !!(port->analog[0].mask & ANALOG_SAITEK);
255 char chf = !!(port->analog[0].mask & ANALOG_ANY_CHF);
256
257 if (port->cooked) {
258 port->bads -= gameport_cooked_read(port->gameport, port->axes, &port->buttons);
259 if (chf)
260 port->buttons = port->buttons ? (1 << analog_chf[port->buttons]) : 0;
261 port->reads++;
262 } else {
263 if (!port->axtime--) {
264 port->bads -= analog_cooked_read(port);
265 port->bads -= analog_button_read(port, saitek, chf);
266 port->reads++;
267 port->axtime = ANALOG_AXIS_TIME - 1;
268 } else {
269 if (!saitek)
270 analog_button_read(port, saitek, chf);
271 }
272 }
273
274 for (i = 0; i < 2; i++)
275 if (port->analog[i].mask)
276 analog_decode(port->analog + i, port->axes, port->initial, port->buttons);
277}
278
279/*
280 * analog_open() is a callback from the input open routine.
281 */
282
283static int analog_open(struct input_dev *dev)
284{
285 struct analog_port *port = input_get_drvdata(dev);
286
287 gameport_start_polling(port->gameport);
288 return 0;
289}
290
291/*
292 * analog_close() is a callback from the input close routine.
293 */
294
295static void analog_close(struct input_dev *dev)
296{
297 struct analog_port *port = input_get_drvdata(dev);
298
299 gameport_stop_polling(port->gameport);
300}
301
302/*
303 * analog_calibrate_timer() calibrates the timer and computes loop
304 * and timeout values for a joystick port.
305 */
306
307static void analog_calibrate_timer(struct analog_port *port)
308{
309 struct gameport *gameport = port->gameport;
310 unsigned int i, t, tx;
311 ktime_t t1, t2, t3;
312 unsigned long flags;
313
314 tx = ~0;
315
316 for (i = 0; i < 50; i++) {
317 local_irq_save(flags);
318 t1 = ktime_get();
319 for (t = 0; t < 50; t++) {
320 gameport_read(gameport);
321 t2 = ktime_get();
322 }
323 t3 = ktime_get();
324 local_irq_restore(flags);
325 udelay(i);
326 t = ktime_sub(t2, t1) - ktime_sub(t3, t2);
327 if (t < tx) tx = t;
328 }
329
330 port->loop = tx / 50;
331}
332
333/*
334 * analog_name() constructs a name for an analog joystick.
335 */
336
337static void analog_name(struct analog *analog)
338{
339 struct seq_buf s;
340
341 seq_buf_init(&s, analog->name, sizeof(analog->name));
342 seq_buf_printf(&s, "Analog %d-axis %d-button",
343 hweight8(analog->mask & ANALOG_AXES_STD),
344 hweight8(analog->mask & ANALOG_BTNS_STD) + !!(analog->mask & ANALOG_BTNS_CHF) * 2 +
345 hweight16(analog->mask & ANALOG_BTNS_GAMEPAD) + !!(analog->mask & ANALOG_HBTN_CHF) * 4);
346
347 if (analog->mask & ANALOG_HATS_ALL)
348 seq_buf_printf(&s, " %d-hat",
349 hweight16(analog->mask & ANALOG_HATS_ALL));
350
351 if (analog->mask & ANALOG_HAT_FCS)
352 seq_buf_printf(&s, " FCS");
353 if (analog->mask & ANALOG_ANY_CHF)
354 seq_buf_printf(&s, (analog->mask & ANALOG_SAITEK) ? " Saitek" : " CHF");
355
356 seq_buf_printf(&s, (analog->mask & ANALOG_GAMEPAD) ? " gamepad" : " joystick");
357}
358
359/*
360 * analog_init_device()
361 */
362
363static int analog_init_device(struct analog_port *port, struct analog *analog, int index)
364{
365 struct input_dev *input_dev;
366 int i, j, t, v, w, x, y, z;
367 int error;
368
369 analog_name(analog);
370 snprintf(analog->phys, sizeof(analog->phys),
371 "%s/input%d", port->gameport->phys, index);
372 analog->buttons = (analog->mask & ANALOG_GAMEPAD) ? analog_pad_btn : analog_joy_btn;
373
374 analog->dev = input_dev = input_allocate_device();
375 if (!input_dev)
376 return -ENOMEM;
377
378 input_dev->name = analog->name;
379 input_dev->phys = analog->phys;
380 input_dev->id.bustype = BUS_GAMEPORT;
381 input_dev->id.vendor = GAMEPORT_ID_VENDOR_ANALOG;
382 input_dev->id.product = analog->mask >> 4;
383 input_dev->id.version = 0x0100;
384 input_dev->dev.parent = &port->gameport->dev;
385
386 input_set_drvdata(input_dev, port);
387
388 input_dev->open = analog_open;
389 input_dev->close = analog_close;
390
391 input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
392
393 for (i = j = 0; i < 4; i++)
394 if (analog->mask & (1 << i)) {
395
396 t = analog_axes[j];
397 x = port->axes[i];
398 y = (port->axes[0] + port->axes[1]) >> 1;
399 z = y - port->axes[i];
400 z = z > 0 ? z : -z;
401 v = (x >> 3);
402 w = (x >> 3);
403
404 if ((i == 2 || i == 3) && (j == 2 || j == 3) && (z > (y >> 3)))
405 x = y;
406
407 if (analog->mask & ANALOG_SAITEK) {
408 if (i == 2) x = port->axes[i];
409 v = x - (x >> 2);
410 w = (x >> 4);
411 }
412
413 input_set_abs_params(input_dev, t, v, (x << 1) - v, port->fuzz, w);
414 j++;
415 }
416
417 for (i = j = 0; i < 3; i++)
418 if (analog->mask & analog_exts[i])
419 for (x = 0; x < 2; x++) {
420 t = analog_hats[j++];
421 input_set_abs_params(input_dev, t, -1, 1, 0, 0);
422 }
423
424 for (i = j = 0; i < 4; i++)
425 if (analog->mask & (0x10 << i))
426 set_bit(analog->buttons[j++], input_dev->keybit);
427
428 if (analog->mask & ANALOG_BTNS_CHF)
429 for (i = 0; i < 2; i++)
430 set_bit(analog->buttons[j++], input_dev->keybit);
431
432 if (analog->mask & ANALOG_HBTN_CHF)
433 for (i = 0; i < 4; i++)
434 set_bit(analog->buttons[j++], input_dev->keybit);
435
436 for (i = 0; i < 4; i++)
437 if (analog->mask & (ANALOG_BTN_TL << i))
438 set_bit(analog_pads[i], input_dev->keybit);
439
440 analog_decode(analog, port->axes, port->initial, port->buttons);
441
442 error = input_register_device(analog->dev);
443 if (error) {
444 input_free_device(analog->dev);
445 return error;
446 }
447
448 return 0;
449}
450
451/*
452 * analog_init_devices() sets up device-specific values and registers the input devices.
453 */
454
455static int analog_init_masks(struct analog_port *port)
456{
457 int i;
458 struct analog *analog = port->analog;
459 int max[4];
460
461 if (!port->mask)
462 return -1;
463
464 if ((port->mask & 3) != 3 && port->mask != 0xc) {
465 printk(KERN_WARNING "analog.c: Unknown joystick device found "
466 "(data=%#x, %s), probably not analog joystick.\n",
467 port->mask, port->gameport->phys);
468 return -1;
469 }
470
471
472 i = analog_options[0]; /* FIXME !!! - need to specify options for different ports */
473
474 analog[0].mask = i & 0xfffff;
475
476 analog[0].mask &= ~(ANALOG_AXES_STD | ANALOG_HAT_FCS | ANALOG_BTNS_GAMEPAD)
477 | port->mask | ((port->mask << 8) & ANALOG_HAT_FCS)
478 | ((port->mask << 10) & ANALOG_BTNS_TLR) | ((port->mask << 12) & ANALOG_BTNS_TLR2);
479
480 analog[0].mask &= ~(ANALOG_HAT2_CHF)
481 | ((analog[0].mask & ANALOG_HBTN_CHF) ? 0 : ANALOG_HAT2_CHF);
482
483 analog[0].mask &= ~(ANALOG_THROTTLE | ANALOG_BTN_TR | ANALOG_BTN_TR2)
484 | ((~analog[0].mask & ANALOG_HAT_FCS) >> 8)
485 | ((~analog[0].mask & ANALOG_HAT_FCS) << 2)
486 | ((~analog[0].mask & ANALOG_HAT_FCS) << 4);
487
488 analog[0].mask &= ~(ANALOG_THROTTLE | ANALOG_RUDDER)
489 | (((~analog[0].mask & ANALOG_BTNS_TLR ) >> 10)
490 & ((~analog[0].mask & ANALOG_BTNS_TLR2) >> 12));
491
492 analog[1].mask = ((i >> 20) & 0xff) | ((i >> 12) & 0xf0000);
493
494 analog[1].mask &= (analog[0].mask & ANALOG_EXTENSIONS) ? ANALOG_GAMEPAD
495 : (((ANALOG_BTNS_STD | port->mask) & ~analog[0].mask) | ANALOG_GAMEPAD);
496
497 if (port->cooked) {
498
499 for (i = 0; i < 4; i++) max[i] = port->axes[i] << 1;
500
501 if ((analog[0].mask & 0x7) == 0x7) max[2] = (max[0] + max[1]) >> 1;
502 if ((analog[0].mask & 0xb) == 0xb) max[3] = (max[0] + max[1]) >> 1;
503 if ((analog[0].mask & ANALOG_BTN_TL) && !(analog[0].mask & ANALOG_BTN_TL2)) max[2] >>= 1;
504 if ((analog[0].mask & ANALOG_BTN_TR) && !(analog[0].mask & ANALOG_BTN_TR2)) max[3] >>= 1;
505 if ((analog[0].mask & ANALOG_HAT_FCS)) max[3] >>= 1;
506
507 gameport_calibrate(port->gameport, port->axes, max);
508 }
509
510 for (i = 0; i < 4; i++)
511 port->initial[i] = port->axes[i];
512
513 return -!(analog[0].mask || analog[1].mask);
514}
515
516static int analog_init_port(struct gameport *gameport, struct gameport_driver *drv, struct analog_port *port)
517{
518 int i, t, u, v;
519
520 port->gameport = gameport;
521
522 gameport_set_drvdata(gameport, port);
523
524 if (!gameport_open(gameport, drv, GAMEPORT_MODE_RAW)) {
525
526 analog_calibrate_timer(port);
527
528 gameport_trigger(gameport);
529 t = gameport_read(gameport);
530 msleep(ANALOG_MAX_TIME);
531 port->mask = (gameport_read(gameport) ^ t) & t & 0xf;
532 port->fuzz = (NSEC_PER_MSEC * ANALOG_FUZZ_MAGIC) / port->loop / 1000 + ANALOG_FUZZ_BITS;
533
534 for (i = 0; i < ANALOG_INIT_RETRIES; i++) {
535 if (!analog_cooked_read(port))
536 break;
537 msleep(ANALOG_MAX_TIME);
538 }
539
540 u = v = 0;
541
542 msleep(ANALOG_MAX_TIME);
543 t = gameport_time(gameport, ANALOG_MAX_TIME * 1000);
544 gameport_trigger(gameport);
545 while ((gameport_read(port->gameport) & port->mask) && (u < t))
546 u++;
547 udelay(ANALOG_SAITEK_DELAY);
548 t = gameport_time(gameport, ANALOG_SAITEK_TIME);
549 gameport_trigger(gameport);
550 while ((gameport_read(port->gameport) & port->mask) && (v < t))
551 v++;
552
553 if (v < (u >> 1)) { /* FIXME - more than one port */
554 analog_options[0] |= /* FIXME - more than one port */
555 ANALOG_SAITEK | ANALOG_BTNS_CHF | ANALOG_HBTN_CHF | ANALOG_HAT1_CHF;
556 return 0;
557 }
558
559 gameport_close(gameport);
560 }
561
562 if (!gameport_open(gameport, drv, GAMEPORT_MODE_COOKED)) {
563
564 for (i = 0; i < ANALOG_INIT_RETRIES; i++)
565 if (!gameport_cooked_read(gameport, port->axes, &port->buttons))
566 break;
567 for (i = 0; i < 4; i++)
568 if (port->axes[i] != -1)
569 port->mask |= 1 << i;
570
571 port->fuzz = gameport->fuzz;
572 port->cooked = 1;
573 return 0;
574 }
575
576 return gameport_open(gameport, drv, GAMEPORT_MODE_RAW);
577}
578
579static int analog_connect(struct gameport *gameport, struct gameport_driver *drv)
580{
581 struct analog_port *port;
582 int i;
583 int err;
584
585 if (!(port = kzalloc(sizeof(struct analog_port), GFP_KERNEL)))
586 return -ENOMEM;
587
588 err = analog_init_port(gameport, drv, port);
589 if (err)
590 goto fail1;
591
592 err = analog_init_masks(port);
593 if (err)
594 goto fail2;
595
596 gameport_set_poll_handler(gameport, analog_poll);
597 gameport_set_poll_interval(gameport, 10);
598
599 for (i = 0; i < 2; i++)
600 if (port->analog[i].mask) {
601 err = analog_init_device(port, port->analog + i, i);
602 if (err)
603 goto fail3;
604 }
605
606 return 0;
607
608 fail3: while (--i >= 0)
609 if (port->analog[i].mask)
610 input_unregister_device(port->analog[i].dev);
611 fail2: gameport_close(gameport);
612 fail1: gameport_set_drvdata(gameport, NULL);
613 kfree(port);
614 return err;
615}
616
617static void analog_disconnect(struct gameport *gameport)
618{
619 struct analog_port *port = gameport_get_drvdata(gameport);
620 int i;
621
622 for (i = 0; i < 2; i++)
623 if (port->analog[i].mask)
624 input_unregister_device(port->analog[i].dev);
625 gameport_close(gameport);
626 gameport_set_drvdata(gameport, NULL);
627 printk(KERN_INFO "analog.c: %d out of %d reads (%d%%) on %s failed\n",
628 port->bads, port->reads, port->reads ? (port->bads * 100 / port->reads) : 0,
629 port->gameport->phys);
630 kfree(port);
631}
632
633struct analog_types {
634 char *name;
635 int value;
636};
637
638static struct analog_types analog_types[] = {
639 { "none", 0x00000000 },
640 { "auto", 0x000000ff },
641 { "2btn", 0x0000003f },
642 { "y-joy", 0x0cc00033 },
643 { "y-pad", 0x8cc80033 },
644 { "fcs", 0x000008f7 },
645 { "chf", 0x000002ff },
646 { "fullchf", 0x000007ff },
647 { "gamepad", 0x000830f3 },
648 { "gamepad8", 0x0008f0f3 },
649 { NULL, 0 }
650};
651
652static void analog_parse_options(void)
653{
654 int i, j;
655 char *end;
656
657 for (i = 0; i < js_nargs; i++) {
658
659 for (j = 0; analog_types[j].name; j++)
660 if (!strcmp(analog_types[j].name, js[i])) {
661 analog_options[i] = analog_types[j].value;
662 break;
663 }
664 if (analog_types[j].name) continue;
665
666 analog_options[i] = simple_strtoul(js[i], &end, 0);
667 if (end != js[i]) continue;
668
669 analog_options[i] = 0xff;
670 if (!strlen(js[i])) continue;
671
672 printk(KERN_WARNING "analog.c: Bad config for port %d - \"%s\"\n", i, js[i]);
673 }
674
675 for (; i < ANALOG_PORTS; i++)
676 analog_options[i] = 0xff;
677}
678
679/*
680 * The gameport device structure.
681 */
682
683static struct gameport_driver analog_drv = {
684 .driver = {
685 .name = "analog",
686 },
687 .description = DRIVER_DESC,
688 .connect = analog_connect,
689 .disconnect = analog_disconnect,
690};
691
692static int __init analog_init(void)
693{
694 analog_parse_options();
695 return gameport_register_driver(&analog_drv);
696}
697
698static void __exit analog_exit(void)
699{
700 gameport_unregister_driver(&analog_drv);
701}
702
703module_init(analog_init);
704module_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#include <linux/timekeeping.h>
40
41#define DRIVER_DESC "Analog joystick and gamepad driver"
42
43MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
44MODULE_DESCRIPTION(DRIVER_DESC);
45MODULE_LICENSE("GPL");
46
47static bool use_ktime = true;
48module_param(use_ktime, bool, 0400);
49MODULE_PARM_DESC(use_ktime, "Use ktime for measuring I/O speed");
50
51/*
52 * Option parsing.
53 */
54
55#define ANALOG_PORTS 16
56
57static char *js[ANALOG_PORTS];
58static unsigned int js_nargs;
59static int analog_options[ANALOG_PORTS];
60module_param_array_named(map, js, charp, &js_nargs, 0);
61MODULE_PARM_DESC(map, "Describes analog joysticks type/capabilities");
62
63/*
64 * Times, feature definitions.
65 */
66
67#define ANALOG_RUDDER 0x00004
68#define ANALOG_THROTTLE 0x00008
69#define ANALOG_AXES_STD 0x0000f
70#define ANALOG_BTNS_STD 0x000f0
71
72#define ANALOG_BTNS_CHF 0x00100
73#define ANALOG_HAT1_CHF 0x00200
74#define ANALOG_HAT2_CHF 0x00400
75#define ANALOG_HAT_FCS 0x00800
76#define ANALOG_HATS_ALL 0x00e00
77#define ANALOG_BTN_TL 0x01000
78#define ANALOG_BTN_TR 0x02000
79#define ANALOG_BTN_TL2 0x04000
80#define ANALOG_BTN_TR2 0x08000
81#define ANALOG_BTNS_TLR 0x03000
82#define ANALOG_BTNS_TLR2 0x0c000
83#define ANALOG_BTNS_GAMEPAD 0x0f000
84
85#define ANALOG_HBTN_CHF 0x10000
86#define ANALOG_ANY_CHF 0x10700
87#define ANALOG_SAITEK 0x20000
88#define ANALOG_EXTENSIONS 0x7ff00
89#define ANALOG_GAMEPAD 0x80000
90
91#define ANALOG_MAX_TIME 3 /* 3 ms */
92#define ANALOG_LOOP_TIME 2000 /* 2 * loop */
93#define ANALOG_SAITEK_DELAY 200 /* 200 us */
94#define ANALOG_SAITEK_TIME 2000 /* 2000 us */
95#define ANALOG_AXIS_TIME 2 /* 2 * refresh */
96#define ANALOG_INIT_RETRIES 8 /* 8 times */
97#define ANALOG_FUZZ_BITS 2 /* 2 bit more */
98#define ANALOG_FUZZ_MAGIC 36 /* 36 u*ms/loop */
99
100#define ANALOG_MAX_NAME_LENGTH 128
101#define ANALOG_MAX_PHYS_LENGTH 32
102
103static short analog_axes[] = { ABS_X, ABS_Y, ABS_RUDDER, ABS_THROTTLE };
104static short analog_hats[] = { ABS_HAT0X, ABS_HAT0Y, ABS_HAT1X, ABS_HAT1Y, ABS_HAT2X, ABS_HAT2Y };
105static short analog_pads[] = { BTN_Y, BTN_Z, BTN_TL, BTN_TR };
106static short analog_exts[] = { ANALOG_HAT1_CHF, ANALOG_HAT2_CHF, ANALOG_HAT_FCS };
107static short analog_pad_btn[] = { BTN_A, BTN_B, BTN_C, BTN_X, BTN_TL2, BTN_TR2, BTN_SELECT, BTN_START, BTN_MODE, BTN_BASE };
108static short analog_joy_btn[] = { BTN_TRIGGER, BTN_THUMB, BTN_TOP, BTN_TOP2, BTN_BASE, BTN_BASE2,
109 BTN_BASE3, BTN_BASE4, BTN_BASE5, BTN_BASE6 };
110
111static unsigned char analog_chf[] = { 0xf, 0x0, 0x1, 0x9, 0x2, 0x4, 0xc, 0x8, 0x3, 0x5, 0xb, 0x7, 0xd, 0xe, 0xa, 0x6 };
112
113struct analog {
114 struct input_dev *dev;
115 int mask;
116 short *buttons;
117 char name[ANALOG_MAX_NAME_LENGTH];
118 char phys[ANALOG_MAX_PHYS_LENGTH];
119};
120
121struct analog_port {
122 struct gameport *gameport;
123 struct analog analog[2];
124 unsigned char mask;
125 char saitek;
126 char cooked;
127 int bads;
128 int reads;
129 int speed;
130 int loop;
131 int fuzz;
132 int axes[4];
133 int buttons;
134 int initial[4];
135 int axtime;
136};
137
138/*
139 * Time macros.
140 */
141
142#ifdef __i386__
143
144#include <linux/i8253.h>
145
146#define GET_TIME(x) do { if (cpu_has_tsc) x = (unsigned int)rdtsc(); else x = get_time_pit(); } while (0)
147#define DELTA(x,y) (cpu_has_tsc ? ((y) - (x)) : ((x) - (y) + ((x) < (y) ? PIT_TICK_RATE / HZ : 0)))
148#define TIME_NAME (cpu_has_tsc?"TSC":"PIT")
149static unsigned int get_time_pit(void)
150{
151 unsigned long flags;
152 unsigned int count;
153
154 raw_spin_lock_irqsave(&i8253_lock, flags);
155 outb_p(0x00, 0x43);
156 count = inb_p(0x40);
157 count |= inb_p(0x40) << 8;
158 raw_spin_unlock_irqrestore(&i8253_lock, flags);
159
160 return count;
161}
162#elif defined(__x86_64__)
163#define GET_TIME(x) do { x = (unsigned int)rdtsc(); } while (0)
164#define DELTA(x,y) ((y)-(x))
165#define TIME_NAME "TSC"
166#elif defined(__alpha__) || defined(CONFIG_MN10300) || defined(CONFIG_ARM) || defined(CONFIG_ARM64) || defined(CONFIG_TILE)
167#define GET_TIME(x) do { x = get_cycles(); } while (0)
168#define DELTA(x,y) ((y)-(x))
169#define TIME_NAME "get_cycles"
170#else
171#define FAKE_TIME
172static unsigned long analog_faketime = 0;
173#define GET_TIME(x) do { x = analog_faketime++; } while(0)
174#define DELTA(x,y) ((y)-(x))
175#define TIME_NAME "Unreliable"
176#warning Precise timer not defined for this architecture.
177#endif
178
179static inline u64 get_time(void)
180{
181 if (use_ktime) {
182 return ktime_get_ns();
183 } else {
184 unsigned int x;
185 GET_TIME(x);
186 return x;
187 }
188}
189
190static inline unsigned int delta(u64 x, u64 y)
191{
192 if (use_ktime)
193 return y - x;
194 else
195 return DELTA((unsigned int)x, (unsigned int)y);
196}
197
198/*
199 * analog_decode() decodes analog joystick data and reports input events.
200 */
201
202static void analog_decode(struct analog *analog, int *axes, int *initial, int buttons)
203{
204 struct input_dev *dev = analog->dev;
205 int i, j;
206
207 if (analog->mask & ANALOG_HAT_FCS)
208 for (i = 0; i < 4; i++)
209 if (axes[3] < ((initial[3] * ((i << 1) + 1)) >> 3)) {
210 buttons |= 1 << (i + 14);
211 break;
212 }
213
214 for (i = j = 0; i < 6; i++)
215 if (analog->mask & (0x10 << i))
216 input_report_key(dev, analog->buttons[j++], (buttons >> i) & 1);
217
218 if (analog->mask & ANALOG_HBTN_CHF)
219 for (i = 0; i < 4; i++)
220 input_report_key(dev, analog->buttons[j++], (buttons >> (i + 10)) & 1);
221
222 if (analog->mask & ANALOG_BTN_TL)
223 input_report_key(dev, analog_pads[0], axes[2] < (initial[2] >> 1));
224 if (analog->mask & ANALOG_BTN_TR)
225 input_report_key(dev, analog_pads[1], axes[3] < (initial[3] >> 1));
226 if (analog->mask & ANALOG_BTN_TL2)
227 input_report_key(dev, analog_pads[2], axes[2] > (initial[2] + (initial[2] >> 1)));
228 if (analog->mask & ANALOG_BTN_TR2)
229 input_report_key(dev, analog_pads[3], axes[3] > (initial[3] + (initial[3] >> 1)));
230
231 for (i = j = 0; i < 4; i++)
232 if (analog->mask & (1 << i))
233 input_report_abs(dev, analog_axes[j++], axes[i]);
234
235 for (i = j = 0; i < 3; i++)
236 if (analog->mask & analog_exts[i]) {
237 input_report_abs(dev, analog_hats[j++],
238 ((buttons >> ((i << 2) + 7)) & 1) - ((buttons >> ((i << 2) + 9)) & 1));
239 input_report_abs(dev, analog_hats[j++],
240 ((buttons >> ((i << 2) + 8)) & 1) - ((buttons >> ((i << 2) + 6)) & 1));
241 }
242
243 input_sync(dev);
244}
245
246/*
247 * analog_cooked_read() reads analog joystick data.
248 */
249
250static int analog_cooked_read(struct analog_port *port)
251{
252 struct gameport *gameport = port->gameport;
253 u64 time[4], start, loop, now;
254 unsigned int loopout, timeout;
255 unsigned char data[4], this, last;
256 unsigned long flags;
257 int i, j;
258
259 loopout = (ANALOG_LOOP_TIME * port->loop) / 1000;
260 timeout = ANALOG_MAX_TIME * port->speed;
261
262 local_irq_save(flags);
263 gameport_trigger(gameport);
264 now = get_time();
265 local_irq_restore(flags);
266
267 start = now;
268 this = port->mask;
269 i = 0;
270
271 do {
272 loop = now;
273 last = this;
274
275 local_irq_disable();
276 this = gameport_read(gameport) & port->mask;
277 now = get_time();
278 local_irq_restore(flags);
279
280 if ((last ^ this) && (delta(loop, now) < loopout)) {
281 data[i] = last ^ this;
282 time[i] = now;
283 i++;
284 }
285
286 } while (this && (i < 4) && (delta(start, now) < timeout));
287
288 this <<= 4;
289
290 for (--i; i >= 0; i--) {
291 this |= data[i];
292 for (j = 0; j < 4; j++)
293 if (data[i] & (1 << j))
294 port->axes[j] = (delta(start, time[i]) << ANALOG_FUZZ_BITS) / port->loop;
295 }
296
297 return -(this != port->mask);
298}
299
300static int analog_button_read(struct analog_port *port, char saitek, char chf)
301{
302 unsigned char u;
303 int t = 1, i = 0;
304 int strobe = gameport_time(port->gameport, ANALOG_SAITEK_TIME);
305
306 u = gameport_read(port->gameport);
307
308 if (!chf) {
309 port->buttons = (~u >> 4) & 0xf;
310 return 0;
311 }
312
313 port->buttons = 0;
314
315 while ((~u & 0xf0) && (i < 16) && t) {
316 port->buttons |= 1 << analog_chf[(~u >> 4) & 0xf];
317 if (!saitek) return 0;
318 udelay(ANALOG_SAITEK_DELAY);
319 t = strobe;
320 gameport_trigger(port->gameport);
321 while (((u = gameport_read(port->gameport)) & port->mask) && t) t--;
322 i++;
323 }
324
325 return -(!t || (i == 16));
326}
327
328/*
329 * analog_poll() repeatedly polls the Analog joysticks.
330 */
331
332static void analog_poll(struct gameport *gameport)
333{
334 struct analog_port *port = gameport_get_drvdata(gameport);
335 int i;
336
337 char saitek = !!(port->analog[0].mask & ANALOG_SAITEK);
338 char chf = !!(port->analog[0].mask & ANALOG_ANY_CHF);
339
340 if (port->cooked) {
341 port->bads -= gameport_cooked_read(port->gameport, port->axes, &port->buttons);
342 if (chf)
343 port->buttons = port->buttons ? (1 << analog_chf[port->buttons]) : 0;
344 port->reads++;
345 } else {
346 if (!port->axtime--) {
347 port->bads -= analog_cooked_read(port);
348 port->bads -= analog_button_read(port, saitek, chf);
349 port->reads++;
350 port->axtime = ANALOG_AXIS_TIME - 1;
351 } else {
352 if (!saitek)
353 analog_button_read(port, saitek, chf);
354 }
355 }
356
357 for (i = 0; i < 2; i++)
358 if (port->analog[i].mask)
359 analog_decode(port->analog + i, port->axes, port->initial, port->buttons);
360}
361
362/*
363 * analog_open() is a callback from the input open routine.
364 */
365
366static int analog_open(struct input_dev *dev)
367{
368 struct analog_port *port = input_get_drvdata(dev);
369
370 gameport_start_polling(port->gameport);
371 return 0;
372}
373
374/*
375 * analog_close() is a callback from the input close routine.
376 */
377
378static void analog_close(struct input_dev *dev)
379{
380 struct analog_port *port = input_get_drvdata(dev);
381
382 gameport_stop_polling(port->gameport);
383}
384
385/*
386 * analog_calibrate_timer() calibrates the timer and computes loop
387 * and timeout values for a joystick port.
388 */
389
390static void analog_calibrate_timer(struct analog_port *port)
391{
392 struct gameport *gameport = port->gameport;
393 unsigned int i, t, tx;
394 u64 t1, t2, t3;
395 unsigned long flags;
396
397 if (use_ktime) {
398 port->speed = 1000000;
399 } else {
400 local_irq_save(flags);
401 t1 = get_time();
402#ifdef FAKE_TIME
403 analog_faketime += 830;
404#endif
405 mdelay(1);
406 t2 = get_time();
407 t3 = get_time();
408 local_irq_restore(flags);
409
410 port->speed = delta(t1, t2) - delta(t2, t3);
411 }
412
413 tx = ~0;
414
415 for (i = 0; i < 50; i++) {
416 local_irq_save(flags);
417 t1 = get_time();
418 for (t = 0; t < 50; t++) {
419 gameport_read(gameport);
420 t2 = get_time();
421 }
422 t3 = get_time();
423 local_irq_restore(flags);
424 udelay(i);
425 t = delta(t1, t2) - delta(t2, t3);
426 if (t < tx) tx = t;
427 }
428
429 port->loop = tx / 50;
430}
431
432/*
433 * analog_name() constructs a name for an analog joystick.
434 */
435
436static void analog_name(struct analog *analog)
437{
438 snprintf(analog->name, sizeof(analog->name), "Analog %d-axis %d-button",
439 hweight8(analog->mask & ANALOG_AXES_STD),
440 hweight8(analog->mask & ANALOG_BTNS_STD) + !!(analog->mask & ANALOG_BTNS_CHF) * 2 +
441 hweight16(analog->mask & ANALOG_BTNS_GAMEPAD) + !!(analog->mask & ANALOG_HBTN_CHF) * 4);
442
443 if (analog->mask & ANALOG_HATS_ALL)
444 snprintf(analog->name, sizeof(analog->name), "%s %d-hat",
445 analog->name, hweight16(analog->mask & ANALOG_HATS_ALL));
446
447 if (analog->mask & ANALOG_HAT_FCS)
448 strlcat(analog->name, " FCS", sizeof(analog->name));
449 if (analog->mask & ANALOG_ANY_CHF)
450 strlcat(analog->name, (analog->mask & ANALOG_SAITEK) ? " Saitek" : " CHF",
451 sizeof(analog->name));
452
453 strlcat(analog->name, (analog->mask & ANALOG_GAMEPAD) ? " gamepad": " joystick",
454 sizeof(analog->name));
455}
456
457/*
458 * analog_init_device()
459 */
460
461static int analog_init_device(struct analog_port *port, struct analog *analog, int index)
462{
463 struct input_dev *input_dev;
464 int i, j, t, v, w, x, y, z;
465 int error;
466
467 analog_name(analog);
468 snprintf(analog->phys, sizeof(analog->phys),
469 "%s/input%d", port->gameport->phys, index);
470 analog->buttons = (analog->mask & ANALOG_GAMEPAD) ? analog_pad_btn : analog_joy_btn;
471
472 analog->dev = input_dev = input_allocate_device();
473 if (!input_dev)
474 return -ENOMEM;
475
476 input_dev->name = analog->name;
477 input_dev->phys = analog->phys;
478 input_dev->id.bustype = BUS_GAMEPORT;
479 input_dev->id.vendor = GAMEPORT_ID_VENDOR_ANALOG;
480 input_dev->id.product = analog->mask >> 4;
481 input_dev->id.version = 0x0100;
482 input_dev->dev.parent = &port->gameport->dev;
483
484 input_set_drvdata(input_dev, port);
485
486 input_dev->open = analog_open;
487 input_dev->close = analog_close;
488
489 input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
490
491 for (i = j = 0; i < 4; i++)
492 if (analog->mask & (1 << i)) {
493
494 t = analog_axes[j];
495 x = port->axes[i];
496 y = (port->axes[0] + port->axes[1]) >> 1;
497 z = y - port->axes[i];
498 z = z > 0 ? z : -z;
499 v = (x >> 3);
500 w = (x >> 3);
501
502 if ((i == 2 || i == 3) && (j == 2 || j == 3) && (z > (y >> 3)))
503 x = y;
504
505 if (analog->mask & ANALOG_SAITEK) {
506 if (i == 2) x = port->axes[i];
507 v = x - (x >> 2);
508 w = (x >> 4);
509 }
510
511 input_set_abs_params(input_dev, t, v, (x << 1) - v, port->fuzz, w);
512 j++;
513 }
514
515 for (i = j = 0; i < 3; i++)
516 if (analog->mask & analog_exts[i])
517 for (x = 0; x < 2; x++) {
518 t = analog_hats[j++];
519 input_set_abs_params(input_dev, t, -1, 1, 0, 0);
520 }
521
522 for (i = j = 0; i < 4; i++)
523 if (analog->mask & (0x10 << i))
524 set_bit(analog->buttons[j++], input_dev->keybit);
525
526 if (analog->mask & ANALOG_BTNS_CHF)
527 for (i = 0; i < 2; i++)
528 set_bit(analog->buttons[j++], input_dev->keybit);
529
530 if (analog->mask & ANALOG_HBTN_CHF)
531 for (i = 0; i < 4; i++)
532 set_bit(analog->buttons[j++], input_dev->keybit);
533
534 for (i = 0; i < 4; i++)
535 if (analog->mask & (ANALOG_BTN_TL << i))
536 set_bit(analog_pads[i], input_dev->keybit);
537
538 analog_decode(analog, port->axes, port->initial, port->buttons);
539
540 error = input_register_device(analog->dev);
541 if (error) {
542 input_free_device(analog->dev);
543 return error;
544 }
545
546 return 0;
547}
548
549/*
550 * analog_init_devices() sets up device-specific values and registers the input devices.
551 */
552
553static int analog_init_masks(struct analog_port *port)
554{
555 int i;
556 struct analog *analog = port->analog;
557 int max[4];
558
559 if (!port->mask)
560 return -1;
561
562 if ((port->mask & 3) != 3 && port->mask != 0xc) {
563 printk(KERN_WARNING "analog.c: Unknown joystick device found "
564 "(data=%#x, %s), probably not analog joystick.\n",
565 port->mask, port->gameport->phys);
566 return -1;
567 }
568
569
570 i = analog_options[0]; /* FIXME !!! - need to specify options for different ports */
571
572 analog[0].mask = i & 0xfffff;
573
574 analog[0].mask &= ~(ANALOG_AXES_STD | ANALOG_HAT_FCS | ANALOG_BTNS_GAMEPAD)
575 | port->mask | ((port->mask << 8) & ANALOG_HAT_FCS)
576 | ((port->mask << 10) & ANALOG_BTNS_TLR) | ((port->mask << 12) & ANALOG_BTNS_TLR2);
577
578 analog[0].mask &= ~(ANALOG_HAT2_CHF)
579 | ((analog[0].mask & ANALOG_HBTN_CHF) ? 0 : ANALOG_HAT2_CHF);
580
581 analog[0].mask &= ~(ANALOG_THROTTLE | ANALOG_BTN_TR | ANALOG_BTN_TR2)
582 | ((~analog[0].mask & ANALOG_HAT_FCS) >> 8)
583 | ((~analog[0].mask & ANALOG_HAT_FCS) << 2)
584 | ((~analog[0].mask & ANALOG_HAT_FCS) << 4);
585
586 analog[0].mask &= ~(ANALOG_THROTTLE | ANALOG_RUDDER)
587 | (((~analog[0].mask & ANALOG_BTNS_TLR ) >> 10)
588 & ((~analog[0].mask & ANALOG_BTNS_TLR2) >> 12));
589
590 analog[1].mask = ((i >> 20) & 0xff) | ((i >> 12) & 0xf0000);
591
592 analog[1].mask &= (analog[0].mask & ANALOG_EXTENSIONS) ? ANALOG_GAMEPAD
593 : (((ANALOG_BTNS_STD | port->mask) & ~analog[0].mask) | ANALOG_GAMEPAD);
594
595 if (port->cooked) {
596
597 for (i = 0; i < 4; i++) max[i] = port->axes[i] << 1;
598
599 if ((analog[0].mask & 0x7) == 0x7) max[2] = (max[0] + max[1]) >> 1;
600 if ((analog[0].mask & 0xb) == 0xb) max[3] = (max[0] + max[1]) >> 1;
601 if ((analog[0].mask & ANALOG_BTN_TL) && !(analog[0].mask & ANALOG_BTN_TL2)) max[2] >>= 1;
602 if ((analog[0].mask & ANALOG_BTN_TR) && !(analog[0].mask & ANALOG_BTN_TR2)) max[3] >>= 1;
603 if ((analog[0].mask & ANALOG_HAT_FCS)) max[3] >>= 1;
604
605 gameport_calibrate(port->gameport, port->axes, max);
606 }
607
608 for (i = 0; i < 4; i++)
609 port->initial[i] = port->axes[i];
610
611 return -!(analog[0].mask || analog[1].mask);
612}
613
614static int analog_init_port(struct gameport *gameport, struct gameport_driver *drv, struct analog_port *port)
615{
616 int i, t, u, v;
617
618 port->gameport = gameport;
619
620 gameport_set_drvdata(gameport, port);
621
622 if (!gameport_open(gameport, drv, GAMEPORT_MODE_RAW)) {
623
624 analog_calibrate_timer(port);
625
626 gameport_trigger(gameport);
627 t = gameport_read(gameport);
628 msleep(ANALOG_MAX_TIME);
629 port->mask = (gameport_read(gameport) ^ t) & t & 0xf;
630 port->fuzz = (port->speed * ANALOG_FUZZ_MAGIC) / port->loop / 1000 + ANALOG_FUZZ_BITS;
631
632 for (i = 0; i < ANALOG_INIT_RETRIES; i++) {
633 if (!analog_cooked_read(port))
634 break;
635 msleep(ANALOG_MAX_TIME);
636 }
637
638 u = v = 0;
639
640 msleep(ANALOG_MAX_TIME);
641 t = gameport_time(gameport, ANALOG_MAX_TIME * 1000);
642 gameport_trigger(gameport);
643 while ((gameport_read(port->gameport) & port->mask) && (u < t))
644 u++;
645 udelay(ANALOG_SAITEK_DELAY);
646 t = gameport_time(gameport, ANALOG_SAITEK_TIME);
647 gameport_trigger(gameport);
648 while ((gameport_read(port->gameport) & port->mask) && (v < t))
649 v++;
650
651 if (v < (u >> 1)) { /* FIXME - more than one port */
652 analog_options[0] |= /* FIXME - more than one port */
653 ANALOG_SAITEK | ANALOG_BTNS_CHF | ANALOG_HBTN_CHF | ANALOG_HAT1_CHF;
654 return 0;
655 }
656
657 gameport_close(gameport);
658 }
659
660 if (!gameport_open(gameport, drv, GAMEPORT_MODE_COOKED)) {
661
662 for (i = 0; i < ANALOG_INIT_RETRIES; i++)
663 if (!gameport_cooked_read(gameport, port->axes, &port->buttons))
664 break;
665 for (i = 0; i < 4; i++)
666 if (port->axes[i] != -1)
667 port->mask |= 1 << i;
668
669 port->fuzz = gameport->fuzz;
670 port->cooked = 1;
671 return 0;
672 }
673
674 return gameport_open(gameport, drv, GAMEPORT_MODE_RAW);
675}
676
677static int analog_connect(struct gameport *gameport, struct gameport_driver *drv)
678{
679 struct analog_port *port;
680 int i;
681 int err;
682
683 if (!(port = kzalloc(sizeof(struct analog_port), GFP_KERNEL)))
684 return - ENOMEM;
685
686 err = analog_init_port(gameport, drv, port);
687 if (err)
688 goto fail1;
689
690 err = analog_init_masks(port);
691 if (err)
692 goto fail2;
693
694 gameport_set_poll_handler(gameport, analog_poll);
695 gameport_set_poll_interval(gameport, 10);
696
697 for (i = 0; i < 2; i++)
698 if (port->analog[i].mask) {
699 err = analog_init_device(port, port->analog + i, i);
700 if (err)
701 goto fail3;
702 }
703
704 return 0;
705
706 fail3: while (--i >= 0)
707 if (port->analog[i].mask)
708 input_unregister_device(port->analog[i].dev);
709 fail2: gameport_close(gameport);
710 fail1: gameport_set_drvdata(gameport, NULL);
711 kfree(port);
712 return err;
713}
714
715static void analog_disconnect(struct gameport *gameport)
716{
717 struct analog_port *port = gameport_get_drvdata(gameport);
718 int i;
719
720 for (i = 0; i < 2; i++)
721 if (port->analog[i].mask)
722 input_unregister_device(port->analog[i].dev);
723 gameport_close(gameport);
724 gameport_set_drvdata(gameport, NULL);
725 printk(KERN_INFO "analog.c: %d out of %d reads (%d%%) on %s failed\n",
726 port->bads, port->reads, port->reads ? (port->bads * 100 / port->reads) : 0,
727 port->gameport->phys);
728 kfree(port);
729}
730
731struct analog_types {
732 char *name;
733 int value;
734};
735
736static struct analog_types analog_types[] = {
737 { "none", 0x00000000 },
738 { "auto", 0x000000ff },
739 { "2btn", 0x0000003f },
740 { "y-joy", 0x0cc00033 },
741 { "y-pad", 0x8cc80033 },
742 { "fcs", 0x000008f7 },
743 { "chf", 0x000002ff },
744 { "fullchf", 0x000007ff },
745 { "gamepad", 0x000830f3 },
746 { "gamepad8", 0x0008f0f3 },
747 { NULL, 0 }
748};
749
750static void analog_parse_options(void)
751{
752 int i, j;
753 char *end;
754
755 for (i = 0; i < js_nargs; i++) {
756
757 for (j = 0; analog_types[j].name; j++)
758 if (!strcmp(analog_types[j].name, js[i])) {
759 analog_options[i] = analog_types[j].value;
760 break;
761 }
762 if (analog_types[j].name) continue;
763
764 analog_options[i] = simple_strtoul(js[i], &end, 0);
765 if (end != js[i]) continue;
766
767 analog_options[i] = 0xff;
768 if (!strlen(js[i])) continue;
769
770 printk(KERN_WARNING "analog.c: Bad config for port %d - \"%s\"\n", i, js[i]);
771 }
772
773 for (; i < ANALOG_PORTS; i++)
774 analog_options[i] = 0xff;
775}
776
777/*
778 * The gameport device structure.
779 */
780
781static struct gameport_driver analog_drv = {
782 .driver = {
783 .name = "analog",
784 },
785 .description = DRIVER_DESC,
786 .connect = analog_connect,
787 .disconnect = analog_disconnect,
788};
789
790static int __init analog_init(void)
791{
792 analog_parse_options();
793 return gameport_register_driver(&analog_drv);
794}
795
796static void __exit analog_exit(void)
797{
798 gameport_unregister_driver(&analog_drv);
799}
800
801module_init(analog_init);
802module_exit(analog_exit);