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
25#include <linux/delay.h>
26#include <linux/kernel.h>
27#include <linux/module.h>
28#include <linux/slab.h>
29#include <linux/bitops.h>
30#include <linux/init.h>
31#include <linux/input.h>
32#include <linux/gameport.h>
33#include <linux/jiffies.h>
34#include <linux/timex.h>
35#include <linux/timekeeping.h>
36
37#define DRIVER_DESC "Analog joystick and gamepad driver"
38
39MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
40MODULE_DESCRIPTION(DRIVER_DESC);
41MODULE_LICENSE("GPL");
42
43static bool use_ktime = true;
44module_param(use_ktime, bool, 0400);
45MODULE_PARM_DESC(use_ktime, "Use ktime for measuring I/O speed");
46
47/*
48 * Option parsing.
49 */
50
51#define ANALOG_PORTS 16
52
53static char *js[ANALOG_PORTS];
54static unsigned int js_nargs;
55static int analog_options[ANALOG_PORTS];
56module_param_array_named(map, js, charp, &js_nargs, 0);
57MODULE_PARM_DESC(map, "Describes analog joysticks type/capabilities");
58
59/*
60 * Times, feature definitions.
61 */
62
63#define ANALOG_RUDDER 0x00004
64#define ANALOG_THROTTLE 0x00008
65#define ANALOG_AXES_STD 0x0000f
66#define ANALOG_BTNS_STD 0x000f0
67
68#define ANALOG_BTNS_CHF 0x00100
69#define ANALOG_HAT1_CHF 0x00200
70#define ANALOG_HAT2_CHF 0x00400
71#define ANALOG_HAT_FCS 0x00800
72#define ANALOG_HATS_ALL 0x00e00
73#define ANALOG_BTN_TL 0x01000
74#define ANALOG_BTN_TR 0x02000
75#define ANALOG_BTN_TL2 0x04000
76#define ANALOG_BTN_TR2 0x08000
77#define ANALOG_BTNS_TLR 0x03000
78#define ANALOG_BTNS_TLR2 0x0c000
79#define ANALOG_BTNS_GAMEPAD 0x0f000
80
81#define ANALOG_HBTN_CHF 0x10000
82#define ANALOG_ANY_CHF 0x10700
83#define ANALOG_SAITEK 0x20000
84#define ANALOG_EXTENSIONS 0x7ff00
85#define ANALOG_GAMEPAD 0x80000
86
87#define ANALOG_MAX_TIME 3 /* 3 ms */
88#define ANALOG_LOOP_TIME 2000 /* 2 * loop */
89#define ANALOG_SAITEK_DELAY 200 /* 200 us */
90#define ANALOG_SAITEK_TIME 2000 /* 2000 us */
91#define ANALOG_AXIS_TIME 2 /* 2 * refresh */
92#define ANALOG_INIT_RETRIES 8 /* 8 times */
93#define ANALOG_FUZZ_BITS 2 /* 2 bit more */
94#define ANALOG_FUZZ_MAGIC 36 /* 36 u*ms/loop */
95
96#define ANALOG_MAX_NAME_LENGTH 128
97#define ANALOG_MAX_PHYS_LENGTH 32
98
99static short analog_axes[] = { ABS_X, ABS_Y, ABS_RUDDER, ABS_THROTTLE };
100static short analog_hats[] = { ABS_HAT0X, ABS_HAT0Y, ABS_HAT1X, ABS_HAT1Y, ABS_HAT2X, ABS_HAT2Y };
101static short analog_pads[] = { BTN_Y, BTN_Z, BTN_TL, BTN_TR };
102static short analog_exts[] = { ANALOG_HAT1_CHF, ANALOG_HAT2_CHF, ANALOG_HAT_FCS };
103static short analog_pad_btn[] = { BTN_A, BTN_B, BTN_C, BTN_X, BTN_TL2, BTN_TR2, BTN_SELECT, BTN_START, BTN_MODE, BTN_BASE };
104static short analog_joy_btn[] = { BTN_TRIGGER, BTN_THUMB, BTN_TOP, BTN_TOP2, BTN_BASE, BTN_BASE2,
105 BTN_BASE3, BTN_BASE4, BTN_BASE5, BTN_BASE6 };
106
107static unsigned char analog_chf[] = { 0xf, 0x0, 0x1, 0x9, 0x2, 0x4, 0xc, 0x8, 0x3, 0x5, 0xb, 0x7, 0xd, 0xe, 0xa, 0x6 };
108
109struct analog {
110 struct input_dev *dev;
111 int mask;
112 short *buttons;
113 char name[ANALOG_MAX_NAME_LENGTH];
114 char phys[ANALOG_MAX_PHYS_LENGTH];
115};
116
117struct analog_port {
118 struct gameport *gameport;
119 struct analog analog[2];
120 unsigned char mask;
121 char saitek;
122 char cooked;
123 int bads;
124 int reads;
125 int speed;
126 int loop;
127 int fuzz;
128 int axes[4];
129 int buttons;
130 int initial[4];
131 int axtime;
132};
133
134/*
135 * Time macros.
136 */
137
138#ifdef __i386__
139
140#include <linux/i8253.h>
141
142#define GET_TIME(x) do { if (boot_cpu_has(X86_FEATURE_TSC)) x = (unsigned int)rdtsc(); else x = get_time_pit(); } while (0)
143#define DELTA(x,y) (boot_cpu_has(X86_FEATURE_TSC) ? ((y) - (x)) : ((x) - (y) + ((x) < (y) ? PIT_TICK_RATE / HZ : 0)))
144#define TIME_NAME (boot_cpu_has(X86_FEATURE_TSC)?"TSC":"PIT")
145static unsigned int get_time_pit(void)
146{
147 unsigned long flags;
148 unsigned int count;
149
150 raw_spin_lock_irqsave(&i8253_lock, flags);
151 outb_p(0x00, 0x43);
152 count = inb_p(0x40);
153 count |= inb_p(0x40) << 8;
154 raw_spin_unlock_irqrestore(&i8253_lock, flags);
155
156 return count;
157}
158#elif defined(__x86_64__)
159#define GET_TIME(x) do { x = (unsigned int)rdtsc(); } while (0)
160#define DELTA(x,y) ((y)-(x))
161#define TIME_NAME "TSC"
162#elif defined(__alpha__) || defined(CONFIG_ARM) || defined(CONFIG_ARM64) || defined(CONFIG_PPC) || defined(CONFIG_RISCV)
163#define GET_TIME(x) do { x = get_cycles(); } while (0)
164#define DELTA(x,y) ((y)-(x))
165#define TIME_NAME "get_cycles"
166#else
167#define FAKE_TIME
168static unsigned long analog_faketime = 0;
169#define GET_TIME(x) do { x = analog_faketime++; } while(0)
170#define DELTA(x,y) ((y)-(x))
171#define TIME_NAME "Unreliable"
172#warning Precise timer not defined for this architecture.
173#endif
174
175static inline u64 get_time(void)
176{
177 if (use_ktime) {
178 return ktime_get_ns();
179 } else {
180 unsigned int x;
181 GET_TIME(x);
182 return x;
183 }
184}
185
186static inline unsigned int delta(u64 x, u64 y)
187{
188 if (use_ktime)
189 return y - x;
190 else
191 return DELTA((unsigned int)x, (unsigned int)y);
192}
193
194/*
195 * analog_decode() decodes analog joystick data and reports input events.
196 */
197
198static void analog_decode(struct analog *analog, int *axes, int *initial, int buttons)
199{
200 struct input_dev *dev = analog->dev;
201 int i, j;
202
203 if (analog->mask & ANALOG_HAT_FCS)
204 for (i = 0; i < 4; i++)
205 if (axes[3] < ((initial[3] * ((i << 1) + 1)) >> 3)) {
206 buttons |= 1 << (i + 14);
207 break;
208 }
209
210 for (i = j = 0; i < 6; i++)
211 if (analog->mask & (0x10 << i))
212 input_report_key(dev, analog->buttons[j++], (buttons >> i) & 1);
213
214 if (analog->mask & ANALOG_HBTN_CHF)
215 for (i = 0; i < 4; i++)
216 input_report_key(dev, analog->buttons[j++], (buttons >> (i + 10)) & 1);
217
218 if (analog->mask & ANALOG_BTN_TL)
219 input_report_key(dev, analog_pads[0], axes[2] < (initial[2] >> 1));
220 if (analog->mask & ANALOG_BTN_TR)
221 input_report_key(dev, analog_pads[1], axes[3] < (initial[3] >> 1));
222 if (analog->mask & ANALOG_BTN_TL2)
223 input_report_key(dev, analog_pads[2], axes[2] > (initial[2] + (initial[2] >> 1)));
224 if (analog->mask & ANALOG_BTN_TR2)
225 input_report_key(dev, analog_pads[3], axes[3] > (initial[3] + (initial[3] >> 1)));
226
227 for (i = j = 0; i < 4; i++)
228 if (analog->mask & (1 << i))
229 input_report_abs(dev, analog_axes[j++], axes[i]);
230
231 for (i = j = 0; i < 3; i++)
232 if (analog->mask & analog_exts[i]) {
233 input_report_abs(dev, analog_hats[j++],
234 ((buttons >> ((i << 2) + 7)) & 1) - ((buttons >> ((i << 2) + 9)) & 1));
235 input_report_abs(dev, analog_hats[j++],
236 ((buttons >> ((i << 2) + 8)) & 1) - ((buttons >> ((i << 2) + 6)) & 1));
237 }
238
239 input_sync(dev);
240}
241
242/*
243 * analog_cooked_read() reads analog joystick data.
244 */
245
246static int analog_cooked_read(struct analog_port *port)
247{
248 struct gameport *gameport = port->gameport;
249 u64 time[4], start, loop, now;
250 unsigned int loopout, timeout;
251 unsigned char data[4], this, last;
252 unsigned long flags;
253 int i, j;
254
255 loopout = (ANALOG_LOOP_TIME * port->loop) / 1000;
256 timeout = ANALOG_MAX_TIME * port->speed;
257
258 local_irq_save(flags);
259 gameport_trigger(gameport);
260 now = get_time();
261 local_irq_restore(flags);
262
263 start = now;
264 this = port->mask;
265 i = 0;
266
267 do {
268 loop = now;
269 last = this;
270
271 local_irq_disable();
272 this = gameport_read(gameport) & port->mask;
273 now = get_time();
274 local_irq_restore(flags);
275
276 if ((last ^ this) && (delta(loop, now) < loopout)) {
277 data[i] = last ^ this;
278 time[i] = now;
279 i++;
280 }
281
282 } while (this && (i < 4) && (delta(start, now) < timeout));
283
284 this <<= 4;
285
286 for (--i; i >= 0; i--) {
287 this |= data[i];
288 for (j = 0; j < 4; j++)
289 if (data[i] & (1 << j))
290 port->axes[j] = (delta(start, time[i]) << ANALOG_FUZZ_BITS) / port->loop;
291 }
292
293 return -(this != port->mask);
294}
295
296static int analog_button_read(struct analog_port *port, char saitek, char chf)
297{
298 unsigned char u;
299 int t = 1, i = 0;
300 int strobe = gameport_time(port->gameport, ANALOG_SAITEK_TIME);
301
302 u = gameport_read(port->gameport);
303
304 if (!chf) {
305 port->buttons = (~u >> 4) & 0xf;
306 return 0;
307 }
308
309 port->buttons = 0;
310
311 while ((~u & 0xf0) && (i < 16) && t) {
312 port->buttons |= 1 << analog_chf[(~u >> 4) & 0xf];
313 if (!saitek) return 0;
314 udelay(ANALOG_SAITEK_DELAY);
315 t = strobe;
316 gameport_trigger(port->gameport);
317 while (((u = gameport_read(port->gameport)) & port->mask) && t) t--;
318 i++;
319 }
320
321 return -(!t || (i == 16));
322}
323
324/*
325 * analog_poll() repeatedly polls the Analog joysticks.
326 */
327
328static void analog_poll(struct gameport *gameport)
329{
330 struct analog_port *port = gameport_get_drvdata(gameport);
331 int i;
332
333 char saitek = !!(port->analog[0].mask & ANALOG_SAITEK);
334 char chf = !!(port->analog[0].mask & ANALOG_ANY_CHF);
335
336 if (port->cooked) {
337 port->bads -= gameport_cooked_read(port->gameport, port->axes, &port->buttons);
338 if (chf)
339 port->buttons = port->buttons ? (1 << analog_chf[port->buttons]) : 0;
340 port->reads++;
341 } else {
342 if (!port->axtime--) {
343 port->bads -= analog_cooked_read(port);
344 port->bads -= analog_button_read(port, saitek, chf);
345 port->reads++;
346 port->axtime = ANALOG_AXIS_TIME - 1;
347 } else {
348 if (!saitek)
349 analog_button_read(port, saitek, chf);
350 }
351 }
352
353 for (i = 0; i < 2; i++)
354 if (port->analog[i].mask)
355 analog_decode(port->analog + i, port->axes, port->initial, port->buttons);
356}
357
358/*
359 * analog_open() is a callback from the input open routine.
360 */
361
362static int analog_open(struct input_dev *dev)
363{
364 struct analog_port *port = input_get_drvdata(dev);
365
366 gameport_start_polling(port->gameport);
367 return 0;
368}
369
370/*
371 * analog_close() is a callback from the input close routine.
372 */
373
374static void analog_close(struct input_dev *dev)
375{
376 struct analog_port *port = input_get_drvdata(dev);
377
378 gameport_stop_polling(port->gameport);
379}
380
381/*
382 * analog_calibrate_timer() calibrates the timer and computes loop
383 * and timeout values for a joystick port.
384 */
385
386static void analog_calibrate_timer(struct analog_port *port)
387{
388 struct gameport *gameport = port->gameport;
389 unsigned int i, t, tx;
390 u64 t1, t2, t3;
391 unsigned long flags;
392
393 if (use_ktime) {
394 port->speed = 1000000;
395 } else {
396 local_irq_save(flags);
397 t1 = get_time();
398#ifdef FAKE_TIME
399 analog_faketime += 830;
400#endif
401 mdelay(1);
402 t2 = get_time();
403 t3 = get_time();
404 local_irq_restore(flags);
405
406 port->speed = delta(t1, t2) - delta(t2, t3);
407 }
408
409 tx = ~0;
410
411 for (i = 0; i < 50; i++) {
412 local_irq_save(flags);
413 t1 = get_time();
414 for (t = 0; t < 50; t++) {
415 gameport_read(gameport);
416 t2 = get_time();
417 }
418 t3 = get_time();
419 local_irq_restore(flags);
420 udelay(i);
421 t = delta(t1, t2) - delta(t2, t3);
422 if (t < tx) tx = t;
423 }
424
425 port->loop = tx / 50;
426}
427
428/*
429 * analog_name() constructs a name for an analog joystick.
430 */
431
432static void analog_name(struct analog *analog)
433{
434 snprintf(analog->name, sizeof(analog->name), "Analog %d-axis %d-button",
435 hweight8(analog->mask & ANALOG_AXES_STD),
436 hweight8(analog->mask & ANALOG_BTNS_STD) + !!(analog->mask & ANALOG_BTNS_CHF) * 2 +
437 hweight16(analog->mask & ANALOG_BTNS_GAMEPAD) + !!(analog->mask & ANALOG_HBTN_CHF) * 4);
438
439 if (analog->mask & ANALOG_HATS_ALL)
440 snprintf(analog->name, sizeof(analog->name), "%s %d-hat",
441 analog->name, hweight16(analog->mask & ANALOG_HATS_ALL));
442
443 if (analog->mask & ANALOG_HAT_FCS)
444 strlcat(analog->name, " FCS", sizeof(analog->name));
445 if (analog->mask & ANALOG_ANY_CHF)
446 strlcat(analog->name, (analog->mask & ANALOG_SAITEK) ? " Saitek" : " CHF",
447 sizeof(analog->name));
448
449 strlcat(analog->name, (analog->mask & ANALOG_GAMEPAD) ? " gamepad": " joystick",
450 sizeof(analog->name));
451}
452
453/*
454 * analog_init_device()
455 */
456
457static int analog_init_device(struct analog_port *port, struct analog *analog, int index)
458{
459 struct input_dev *input_dev;
460 int i, j, t, v, w, x, y, z;
461 int error;
462
463 analog_name(analog);
464 snprintf(analog->phys, sizeof(analog->phys),
465 "%s/input%d", port->gameport->phys, index);
466 analog->buttons = (analog->mask & ANALOG_GAMEPAD) ? analog_pad_btn : analog_joy_btn;
467
468 analog->dev = input_dev = input_allocate_device();
469 if (!input_dev)
470 return -ENOMEM;
471
472 input_dev->name = analog->name;
473 input_dev->phys = analog->phys;
474 input_dev->id.bustype = BUS_GAMEPORT;
475 input_dev->id.vendor = GAMEPORT_ID_VENDOR_ANALOG;
476 input_dev->id.product = analog->mask >> 4;
477 input_dev->id.version = 0x0100;
478 input_dev->dev.parent = &port->gameport->dev;
479
480 input_set_drvdata(input_dev, port);
481
482 input_dev->open = analog_open;
483 input_dev->close = analog_close;
484
485 input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
486
487 for (i = j = 0; i < 4; i++)
488 if (analog->mask & (1 << i)) {
489
490 t = analog_axes[j];
491 x = port->axes[i];
492 y = (port->axes[0] + port->axes[1]) >> 1;
493 z = y - port->axes[i];
494 z = z > 0 ? z : -z;
495 v = (x >> 3);
496 w = (x >> 3);
497
498 if ((i == 2 || i == 3) && (j == 2 || j == 3) && (z > (y >> 3)))
499 x = y;
500
501 if (analog->mask & ANALOG_SAITEK) {
502 if (i == 2) x = port->axes[i];
503 v = x - (x >> 2);
504 w = (x >> 4);
505 }
506
507 input_set_abs_params(input_dev, t, v, (x << 1) - v, port->fuzz, w);
508 j++;
509 }
510
511 for (i = j = 0; i < 3; i++)
512 if (analog->mask & analog_exts[i])
513 for (x = 0; x < 2; x++) {
514 t = analog_hats[j++];
515 input_set_abs_params(input_dev, t, -1, 1, 0, 0);
516 }
517
518 for (i = j = 0; i < 4; i++)
519 if (analog->mask & (0x10 << i))
520 set_bit(analog->buttons[j++], input_dev->keybit);
521
522 if (analog->mask & ANALOG_BTNS_CHF)
523 for (i = 0; i < 2; i++)
524 set_bit(analog->buttons[j++], input_dev->keybit);
525
526 if (analog->mask & ANALOG_HBTN_CHF)
527 for (i = 0; i < 4; i++)
528 set_bit(analog->buttons[j++], input_dev->keybit);
529
530 for (i = 0; i < 4; i++)
531 if (analog->mask & (ANALOG_BTN_TL << i))
532 set_bit(analog_pads[i], input_dev->keybit);
533
534 analog_decode(analog, port->axes, port->initial, port->buttons);
535
536 error = input_register_device(analog->dev);
537 if (error) {
538 input_free_device(analog->dev);
539 return error;
540 }
541
542 return 0;
543}
544
545/*
546 * analog_init_devices() sets up device-specific values and registers the input devices.
547 */
548
549static int analog_init_masks(struct analog_port *port)
550{
551 int i;
552 struct analog *analog = port->analog;
553 int max[4];
554
555 if (!port->mask)
556 return -1;
557
558 if ((port->mask & 3) != 3 && port->mask != 0xc) {
559 printk(KERN_WARNING "analog.c: Unknown joystick device found "
560 "(data=%#x, %s), probably not analog joystick.\n",
561 port->mask, port->gameport->phys);
562 return -1;
563 }
564
565
566 i = analog_options[0]; /* FIXME !!! - need to specify options for different ports */
567
568 analog[0].mask = i & 0xfffff;
569
570 analog[0].mask &= ~(ANALOG_AXES_STD | ANALOG_HAT_FCS | ANALOG_BTNS_GAMEPAD)
571 | port->mask | ((port->mask << 8) & ANALOG_HAT_FCS)
572 | ((port->mask << 10) & ANALOG_BTNS_TLR) | ((port->mask << 12) & ANALOG_BTNS_TLR2);
573
574 analog[0].mask &= ~(ANALOG_HAT2_CHF)
575 | ((analog[0].mask & ANALOG_HBTN_CHF) ? 0 : ANALOG_HAT2_CHF);
576
577 analog[0].mask &= ~(ANALOG_THROTTLE | ANALOG_BTN_TR | ANALOG_BTN_TR2)
578 | ((~analog[0].mask & ANALOG_HAT_FCS) >> 8)
579 | ((~analog[0].mask & ANALOG_HAT_FCS) << 2)
580 | ((~analog[0].mask & ANALOG_HAT_FCS) << 4);
581
582 analog[0].mask &= ~(ANALOG_THROTTLE | ANALOG_RUDDER)
583 | (((~analog[0].mask & ANALOG_BTNS_TLR ) >> 10)
584 & ((~analog[0].mask & ANALOG_BTNS_TLR2) >> 12));
585
586 analog[1].mask = ((i >> 20) & 0xff) | ((i >> 12) & 0xf0000);
587
588 analog[1].mask &= (analog[0].mask & ANALOG_EXTENSIONS) ? ANALOG_GAMEPAD
589 : (((ANALOG_BTNS_STD | port->mask) & ~analog[0].mask) | ANALOG_GAMEPAD);
590
591 if (port->cooked) {
592
593 for (i = 0; i < 4; i++) max[i] = port->axes[i] << 1;
594
595 if ((analog[0].mask & 0x7) == 0x7) max[2] = (max[0] + max[1]) >> 1;
596 if ((analog[0].mask & 0xb) == 0xb) max[3] = (max[0] + max[1]) >> 1;
597 if ((analog[0].mask & ANALOG_BTN_TL) && !(analog[0].mask & ANALOG_BTN_TL2)) max[2] >>= 1;
598 if ((analog[0].mask & ANALOG_BTN_TR) && !(analog[0].mask & ANALOG_BTN_TR2)) max[3] >>= 1;
599 if ((analog[0].mask & ANALOG_HAT_FCS)) max[3] >>= 1;
600
601 gameport_calibrate(port->gameport, port->axes, max);
602 }
603
604 for (i = 0; i < 4; i++)
605 port->initial[i] = port->axes[i];
606
607 return -!(analog[0].mask || analog[1].mask);
608}
609
610static int analog_init_port(struct gameport *gameport, struct gameport_driver *drv, struct analog_port *port)
611{
612 int i, t, u, v;
613
614 port->gameport = gameport;
615
616 gameport_set_drvdata(gameport, port);
617
618 if (!gameport_open(gameport, drv, GAMEPORT_MODE_RAW)) {
619
620 analog_calibrate_timer(port);
621
622 gameport_trigger(gameport);
623 t = gameport_read(gameport);
624 msleep(ANALOG_MAX_TIME);
625 port->mask = (gameport_read(gameport) ^ t) & t & 0xf;
626 port->fuzz = (port->speed * ANALOG_FUZZ_MAGIC) / port->loop / 1000 + ANALOG_FUZZ_BITS;
627
628 for (i = 0; i < ANALOG_INIT_RETRIES; i++) {
629 if (!analog_cooked_read(port))
630 break;
631 msleep(ANALOG_MAX_TIME);
632 }
633
634 u = v = 0;
635
636 msleep(ANALOG_MAX_TIME);
637 t = gameport_time(gameport, ANALOG_MAX_TIME * 1000);
638 gameport_trigger(gameport);
639 while ((gameport_read(port->gameport) & port->mask) && (u < t))
640 u++;
641 udelay(ANALOG_SAITEK_DELAY);
642 t = gameport_time(gameport, ANALOG_SAITEK_TIME);
643 gameport_trigger(gameport);
644 while ((gameport_read(port->gameport) & port->mask) && (v < t))
645 v++;
646
647 if (v < (u >> 1)) { /* FIXME - more than one port */
648 analog_options[0] |= /* FIXME - more than one port */
649 ANALOG_SAITEK | ANALOG_BTNS_CHF | ANALOG_HBTN_CHF | ANALOG_HAT1_CHF;
650 return 0;
651 }
652
653 gameport_close(gameport);
654 }
655
656 if (!gameport_open(gameport, drv, GAMEPORT_MODE_COOKED)) {
657
658 for (i = 0; i < ANALOG_INIT_RETRIES; i++)
659 if (!gameport_cooked_read(gameport, port->axes, &port->buttons))
660 break;
661 for (i = 0; i < 4; i++)
662 if (port->axes[i] != -1)
663 port->mask |= 1 << i;
664
665 port->fuzz = gameport->fuzz;
666 port->cooked = 1;
667 return 0;
668 }
669
670 return gameport_open(gameport, drv, GAMEPORT_MODE_RAW);
671}
672
673static int analog_connect(struct gameport *gameport, struct gameport_driver *drv)
674{
675 struct analog_port *port;
676 int i;
677 int err;
678
679 if (!(port = kzalloc(sizeof(struct analog_port), GFP_KERNEL)))
680 return - ENOMEM;
681
682 err = analog_init_port(gameport, drv, port);
683 if (err)
684 goto fail1;
685
686 err = analog_init_masks(port);
687 if (err)
688 goto fail2;
689
690 gameport_set_poll_handler(gameport, analog_poll);
691 gameport_set_poll_interval(gameport, 10);
692
693 for (i = 0; i < 2; i++)
694 if (port->analog[i].mask) {
695 err = analog_init_device(port, port->analog + i, i);
696 if (err)
697 goto fail3;
698 }
699
700 return 0;
701
702 fail3: while (--i >= 0)
703 if (port->analog[i].mask)
704 input_unregister_device(port->analog[i].dev);
705 fail2: gameport_close(gameport);
706 fail1: gameport_set_drvdata(gameport, NULL);
707 kfree(port);
708 return err;
709}
710
711static void analog_disconnect(struct gameport *gameport)
712{
713 struct analog_port *port = gameport_get_drvdata(gameport);
714 int i;
715
716 for (i = 0; i < 2; i++)
717 if (port->analog[i].mask)
718 input_unregister_device(port->analog[i].dev);
719 gameport_close(gameport);
720 gameport_set_drvdata(gameport, NULL);
721 printk(KERN_INFO "analog.c: %d out of %d reads (%d%%) on %s failed\n",
722 port->bads, port->reads, port->reads ? (port->bads * 100 / port->reads) : 0,
723 port->gameport->phys);
724 kfree(port);
725}
726
727struct analog_types {
728 char *name;
729 int value;
730};
731
732static struct analog_types analog_types[] = {
733 { "none", 0x00000000 },
734 { "auto", 0x000000ff },
735 { "2btn", 0x0000003f },
736 { "y-joy", 0x0cc00033 },
737 { "y-pad", 0x8cc80033 },
738 { "fcs", 0x000008f7 },
739 { "chf", 0x000002ff },
740 { "fullchf", 0x000007ff },
741 { "gamepad", 0x000830f3 },
742 { "gamepad8", 0x0008f0f3 },
743 { NULL, 0 }
744};
745
746static void analog_parse_options(void)
747{
748 int i, j;
749 char *end;
750
751 for (i = 0; i < js_nargs; i++) {
752
753 for (j = 0; analog_types[j].name; j++)
754 if (!strcmp(analog_types[j].name, js[i])) {
755 analog_options[i] = analog_types[j].value;
756 break;
757 }
758 if (analog_types[j].name) continue;
759
760 analog_options[i] = simple_strtoul(js[i], &end, 0);
761 if (end != js[i]) continue;
762
763 analog_options[i] = 0xff;
764 if (!strlen(js[i])) continue;
765
766 printk(KERN_WARNING "analog.c: Bad config for port %d - \"%s\"\n", i, js[i]);
767 }
768
769 for (; i < ANALOG_PORTS; i++)
770 analog_options[i] = 0xff;
771}
772
773/*
774 * The gameport device structure.
775 */
776
777static struct gameport_driver analog_drv = {
778 .driver = {
779 .name = "analog",
780 },
781 .description = DRIVER_DESC,
782 .connect = analog_connect,
783 .disconnect = analog_disconnect,
784};
785
786static int __init analog_init(void)
787{
788 analog_parse_options();
789 return gameport_register_driver(&analog_drv);
790}
791
792static void __exit analog_exit(void)
793{
794 gameport_unregister_driver(&analog_drv);
795}
796
797module_init(analog_init);
798module_exit(analog_exit);
799