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 /*
11 */
12
13 #include <linux/delay.h>
14 #include <linux/kernel.h>
15 #include <linux/module.h>
16 #include <linux/slab.h>
17 #include <linux/bitops.h>
18 #include <linux/init.h>
19 #include <linux/input.h>
20 #include <linux/gameport.h>
21 #include <linux/jiffies.h>
22 #include <linux/timex.h>
23 #include <linux/timekeeping.h>
24
25 #define DRIVER_DESC "Analog joystick and gamepad driver"
26
27 MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
28 MODULE_DESCRIPTION(DRIVER_DESC);
29 MODULE_LICENSE("GPL");
30
31 static bool use_ktime = true;
32 module_param(use_ktime, bool, 0400);
33 MODULE_PARM_DESC(use_ktime, "Use ktime for measuring I/O speed");
34
35 /*
36 * Option parsing.
37 */
38
39 #define ANALOG_PORTS 16
40
41 static char *js[ANALOG_PORTS];
42 static unsigned int js_nargs;
43 static int analog_options[ANALOG_PORTS];
44 module_param_array_named(map, js, charp, &js_nargs, 0);
45 MODULE_PARM_DESC(map, "Describes analog joysticks type/capabilities");
46
47 /*
48 * Times, feature definitions.
49 */
50
51 #define ANALOG_RUDDER 0x00004
52 #define ANALOG_THROTTLE 0x00008
53 #define ANALOG_AXES_STD 0x0000f
54 #define ANALOG_BTNS_STD 0x000f0
55
56 #define ANALOG_BTNS_CHF 0x00100
57 #define ANALOG_HAT1_CHF 0x00200
58 #define ANALOG_HAT2_CHF 0x00400
59 #define ANALOG_HAT_FCS 0x00800
60 #define ANALOG_HATS_ALL 0x00e00
61 #define ANALOG_BTN_TL 0x01000
62 #define ANALOG_BTN_TR 0x02000
63 #define ANALOG_BTN_TL2 0x04000
64 #define ANALOG_BTN_TR2 0x08000
65 #define ANALOG_BTNS_TLR 0x03000
66 #define ANALOG_BTNS_TLR2 0x0c000
67 #define ANALOG_BTNS_GAMEPAD 0x0f000
68
69 #define ANALOG_HBTN_CHF 0x10000
70 #define ANALOG_ANY_CHF 0x10700
71 #define ANALOG_SAITEK 0x20000
72 #define ANALOG_EXTENSIONS 0x7ff00
73 #define ANALOG_GAMEPAD 0x80000
74
75 #define ANALOG_MAX_TIME 3 /* 3 ms */
76 #define ANALOG_LOOP_TIME 2000 /* 2 * loop */
77 #define ANALOG_SAITEK_DELAY 200 /* 200 us */
78 #define ANALOG_SAITEK_TIME 2000 /* 2000 us */
79 #define ANALOG_AXIS_TIME 2 /* 2 * refresh */
80 #define ANALOG_INIT_RETRIES 8 /* 8 times */
81 #define ANALOG_FUZZ_BITS 2 /* 2 bit more */
82 #define ANALOG_FUZZ_MAGIC 36 /* 36 u*ms/loop */
83
84 #define ANALOG_MAX_NAME_LENGTH 128
85 #define ANALOG_MAX_PHYS_LENGTH 32
86
87 static short analog_axes[] = { ABS_X, ABS_Y, ABS_RUDDER, ABS_THROTTLE };
88 static short analog_hats[] = { ABS_HAT0X, ABS_HAT0Y, ABS_HAT1X, ABS_HAT1Y, ABS_HAT2X, ABS_HAT2Y };
89 static short analog_pads[] = { BTN_Y, BTN_Z, BTN_TL, BTN_TR };
90 static short analog_exts[] = { ANALOG_HAT1_CHF, ANALOG_HAT2_CHF, ANALOG_HAT_FCS };
91 static short analog_pad_btn[] = { BTN_A, BTN_B, BTN_C, BTN_X, BTN_TL2, BTN_TR2, BTN_SELECT, BTN_START, BTN_MODE, BTN_BASE };
92 static short analog_joy_btn[] = { BTN_TRIGGER, BTN_THUMB, BTN_TOP, BTN_TOP2, BTN_BASE, BTN_BASE2,
93 BTN_BASE3, BTN_BASE4, BTN_BASE5, BTN_BASE6 };
94
95 static unsigned char analog_chf[] = { 0xf, 0x0, 0x1, 0x9, 0x2, 0x4, 0xc, 0x8, 0x3, 0x5, 0xb, 0x7, 0xd, 0xe, 0xa, 0x6 };
96
97 struct analog {
98 struct input_dev *dev;
99 int mask;
100 short *buttons;
101 char name[ANALOG_MAX_NAME_LENGTH];
102 char phys[ANALOG_MAX_PHYS_LENGTH];
103 };
104
105 struct analog_port {
106 struct gameport *gameport;
107 struct analog analog[2];
108 unsigned char mask;
109 char saitek;
110 char cooked;
111 int bads;
112 int reads;
113 int speed;
114 int loop;
115 int fuzz;
116 int axes[4];
117 int buttons;
118 int initial[4];
119 int axtime;
120 };
121
122 /*
123 * Time macros.
124 */
125
126 #ifdef __i386__
127
128 #include <linux/i8253.h>
129
130 #define GET_TIME(x) do { if (boot_cpu_has(X86_FEATURE_TSC)) x = (unsigned int)rdtsc(); else x = get_time_pit(); } while (0)
131 #define DELTA(x,y) (boot_cpu_has(X86_FEATURE_TSC) ? ((y) - (x)) : ((x) - (y) + ((x) < (y) ? PIT_TICK_RATE / HZ : 0)))
132 #define TIME_NAME (boot_cpu_has(X86_FEATURE_TSC)?"TSC":"PIT")
get_time_pit(void)133 static unsigned int get_time_pit(void)
134 {
135 unsigned long flags;
136 unsigned int count;
137
138 raw_spin_lock_irqsave(&i8253_lock, flags);
139 outb_p(0x00, 0x43);
140 count = inb_p(0x40);
141 count |= inb_p(0x40) << 8;
142 raw_spin_unlock_irqrestore(&i8253_lock, flags);
143
144 return count;
145 }
146 #elif defined(__x86_64__)
147 #define GET_TIME(x) do { x = (unsigned int)rdtsc(); } while (0)
148 #define DELTA(x,y) ((y)-(x))
149 #define TIME_NAME "TSC"
150 #elif defined(__alpha__) || defined(CONFIG_ARM) || defined(CONFIG_ARM64) || defined(CONFIG_PPC) || defined(CONFIG_RISCV)
151 #define GET_TIME(x) do { x = get_cycles(); } while (0)
152 #define DELTA(x,y) ((y)-(x))
153 #define TIME_NAME "get_cycles"
154 #else
155 #define FAKE_TIME
156 static unsigned long analog_faketime = 0;
157 #define GET_TIME(x) do { x = analog_faketime++; } while(0)
158 #define DELTA(x,y) ((y)-(x))
159 #define TIME_NAME "Unreliable"
160 #warning Precise timer not defined for this architecture.
161 #endif
162
get_time(void)163 static inline u64 get_time(void)
164 {
165 if (use_ktime) {
166 return ktime_get_ns();
167 } else {
168 unsigned int x;
169 GET_TIME(x);
170 return x;
171 }
172 }
173
delta(u64 x,u64 y)174 static inline unsigned int delta(u64 x, u64 y)
175 {
176 if (use_ktime)
177 return y - x;
178 else
179 return DELTA((unsigned int)x, (unsigned int)y);
180 }
181
182 /*
183 * analog_decode() decodes analog joystick data and reports input events.
184 */
185
analog_decode(struct analog * analog,int * axes,int * initial,int buttons)186 static void analog_decode(struct analog *analog, int *axes, int *initial, int buttons)
187 {
188 struct input_dev *dev = analog->dev;
189 int i, j;
190
191 if (analog->mask & ANALOG_HAT_FCS)
192 for (i = 0; i < 4; i++)
193 if (axes[3] < ((initial[3] * ((i << 1) + 1)) >> 3)) {
194 buttons |= 1 << (i + 14);
195 break;
196 }
197
198 for (i = j = 0; i < 6; i++)
199 if (analog->mask & (0x10 << i))
200 input_report_key(dev, analog->buttons[j++], (buttons >> i) & 1);
201
202 if (analog->mask & ANALOG_HBTN_CHF)
203 for (i = 0; i < 4; i++)
204 input_report_key(dev, analog->buttons[j++], (buttons >> (i + 10)) & 1);
205
206 if (analog->mask & ANALOG_BTN_TL)
207 input_report_key(dev, analog_pads[0], axes[2] < (initial[2] >> 1));
208 if (analog->mask & ANALOG_BTN_TR)
209 input_report_key(dev, analog_pads[1], axes[3] < (initial[3] >> 1));
210 if (analog->mask & ANALOG_BTN_TL2)
211 input_report_key(dev, analog_pads[2], axes[2] > (initial[2] + (initial[2] >> 1)));
212 if (analog->mask & ANALOG_BTN_TR2)
213 input_report_key(dev, analog_pads[3], axes[3] > (initial[3] + (initial[3] >> 1)));
214
215 for (i = j = 0; i < 4; i++)
216 if (analog->mask & (1 << i))
217 input_report_abs(dev, analog_axes[j++], axes[i]);
218
219 for (i = j = 0; i < 3; i++)
220 if (analog->mask & analog_exts[i]) {
221 input_report_abs(dev, analog_hats[j++],
222 ((buttons >> ((i << 2) + 7)) & 1) - ((buttons >> ((i << 2) + 9)) & 1));
223 input_report_abs(dev, analog_hats[j++],
224 ((buttons >> ((i << 2) + 8)) & 1) - ((buttons >> ((i << 2) + 6)) & 1));
225 }
226
227 input_sync(dev);
228 }
229
230 /*
231 * analog_cooked_read() reads analog joystick data.
232 */
233
analog_cooked_read(struct analog_port * port)234 static int analog_cooked_read(struct analog_port *port)
235 {
236 struct gameport *gameport = port->gameport;
237 u64 time[4], start, loop, now;
238 unsigned int loopout, timeout;
239 unsigned char data[4], this, last;
240 unsigned long flags;
241 int i, j;
242
243 loopout = (ANALOG_LOOP_TIME * port->loop) / 1000;
244 timeout = ANALOG_MAX_TIME * port->speed;
245
246 local_irq_save(flags);
247 gameport_trigger(gameport);
248 now = get_time();
249 local_irq_restore(flags);
250
251 start = now;
252 this = port->mask;
253 i = 0;
254
255 do {
256 loop = now;
257 last = this;
258
259 local_irq_disable();
260 this = gameport_read(gameport) & port->mask;
261 now = get_time();
262 local_irq_restore(flags);
263
264 if ((last ^ this) && (delta(loop, now) < loopout)) {
265 data[i] = last ^ this;
266 time[i] = now;
267 i++;
268 }
269
270 } while (this && (i < 4) && (delta(start, now) < timeout));
271
272 this <<= 4;
273
274 for (--i; i >= 0; i--) {
275 this |= data[i];
276 for (j = 0; j < 4; j++)
277 if (data[i] & (1 << j))
278 port->axes[j] = (delta(start, time[i]) << ANALOG_FUZZ_BITS) / port->loop;
279 }
280
281 return -(this != port->mask);
282 }
283
analog_button_read(struct analog_port * port,char saitek,char chf)284 static int analog_button_read(struct analog_port *port, char saitek, char chf)
285 {
286 unsigned char u;
287 int t = 1, i = 0;
288 int strobe = gameport_time(port->gameport, ANALOG_SAITEK_TIME);
289
290 u = gameport_read(port->gameport);
291
292 if (!chf) {
293 port->buttons = (~u >> 4) & 0xf;
294 return 0;
295 }
296
297 port->buttons = 0;
298
299 while ((~u & 0xf0) && (i < 16) && t) {
300 port->buttons |= 1 << analog_chf[(~u >> 4) & 0xf];
301 if (!saitek) return 0;
302 udelay(ANALOG_SAITEK_DELAY);
303 t = strobe;
304 gameport_trigger(port->gameport);
305 while (((u = gameport_read(port->gameport)) & port->mask) && t) t--;
306 i++;
307 }
308
309 return -(!t || (i == 16));
310 }
311
312 /*
313 * analog_poll() repeatedly polls the Analog joysticks.
314 */
315
analog_poll(struct gameport * gameport)316 static void analog_poll(struct gameport *gameport)
317 {
318 struct analog_port *port = gameport_get_drvdata(gameport);
319 int i;
320
321 char saitek = !!(port->analog[0].mask & ANALOG_SAITEK);
322 char chf = !!(port->analog[0].mask & ANALOG_ANY_CHF);
323
324 if (port->cooked) {
325 port->bads -= gameport_cooked_read(port->gameport, port->axes, &port->buttons);
326 if (chf)
327 port->buttons = port->buttons ? (1 << analog_chf[port->buttons]) : 0;
328 port->reads++;
329 } else {
330 if (!port->axtime--) {
331 port->bads -= analog_cooked_read(port);
332 port->bads -= analog_button_read(port, saitek, chf);
333 port->reads++;
334 port->axtime = ANALOG_AXIS_TIME - 1;
335 } else {
336 if (!saitek)
337 analog_button_read(port, saitek, chf);
338 }
339 }
340
341 for (i = 0; i < 2; i++)
342 if (port->analog[i].mask)
343 analog_decode(port->analog + i, port->axes, port->initial, port->buttons);
344 }
345
346 /*
347 * analog_open() is a callback from the input open routine.
348 */
349
analog_open(struct input_dev * dev)350 static int analog_open(struct input_dev *dev)
351 {
352 struct analog_port *port = input_get_drvdata(dev);
353
354 gameport_start_polling(port->gameport);
355 return 0;
356 }
357
358 /*
359 * analog_close() is a callback from the input close routine.
360 */
361
analog_close(struct input_dev * dev)362 static void analog_close(struct input_dev *dev)
363 {
364 struct analog_port *port = input_get_drvdata(dev);
365
366 gameport_stop_polling(port->gameport);
367 }
368
369 /*
370 * analog_calibrate_timer() calibrates the timer and computes loop
371 * and timeout values for a joystick port.
372 */
373
analog_calibrate_timer(struct analog_port * port)374 static void analog_calibrate_timer(struct analog_port *port)
375 {
376 struct gameport *gameport = port->gameport;
377 unsigned int i, t, tx;
378 u64 t1, t2, t3;
379 unsigned long flags;
380
381 if (use_ktime) {
382 port->speed = 1000000;
383 } else {
384 local_irq_save(flags);
385 t1 = get_time();
386 #ifdef FAKE_TIME
387 analog_faketime += 830;
388 #endif
389 mdelay(1);
390 t2 = get_time();
391 t3 = get_time();
392 local_irq_restore(flags);
393
394 port->speed = delta(t1, t2) - delta(t2, t3);
395 }
396
397 tx = ~0;
398
399 for (i = 0; i < 50; i++) {
400 local_irq_save(flags);
401 t1 = get_time();
402 for (t = 0; t < 50; t++) {
403 gameport_read(gameport);
404 t2 = get_time();
405 }
406 t3 = get_time();
407 local_irq_restore(flags);
408 udelay(i);
409 t = delta(t1, t2) - delta(t2, t3);
410 if (t < tx) tx = t;
411 }
412
413 port->loop = tx / 50;
414 }
415
416 /*
417 * analog_name() constructs a name for an analog joystick.
418 */
419
analog_name(struct analog * analog)420 static void analog_name(struct analog *analog)
421 {
422 snprintf(analog->name, sizeof(analog->name), "Analog %d-axis %d-button",
423 hweight8(analog->mask & ANALOG_AXES_STD),
424 hweight8(analog->mask & ANALOG_BTNS_STD) + !!(analog->mask & ANALOG_BTNS_CHF) * 2 +
425 hweight16(analog->mask & ANALOG_BTNS_GAMEPAD) + !!(analog->mask & ANALOG_HBTN_CHF) * 4);
426
427 if (analog->mask & ANALOG_HATS_ALL)
428 snprintf(analog->name, sizeof(analog->name), "%s %d-hat",
429 analog->name, hweight16(analog->mask & ANALOG_HATS_ALL));
430
431 if (analog->mask & ANALOG_HAT_FCS)
432 strlcat(analog->name, " FCS", sizeof(analog->name));
433 if (analog->mask & ANALOG_ANY_CHF)
434 strlcat(analog->name, (analog->mask & ANALOG_SAITEK) ? " Saitek" : " CHF",
435 sizeof(analog->name));
436
437 strlcat(analog->name, (analog->mask & ANALOG_GAMEPAD) ? " gamepad": " joystick",
438 sizeof(analog->name));
439 }
440
441 /*
442 * analog_init_device()
443 */
444
analog_init_device(struct analog_port * port,struct analog * analog,int index)445 static int analog_init_device(struct analog_port *port, struct analog *analog, int index)
446 {
447 struct input_dev *input_dev;
448 int i, j, t, v, w, x, y, z;
449 int error;
450
451 analog_name(analog);
452 snprintf(analog->phys, sizeof(analog->phys),
453 "%s/input%d", port->gameport->phys, index);
454 analog->buttons = (analog->mask & ANALOG_GAMEPAD) ? analog_pad_btn : analog_joy_btn;
455
456 analog->dev = input_dev = input_allocate_device();
457 if (!input_dev)
458 return -ENOMEM;
459
460 input_dev->name = analog->name;
461 input_dev->phys = analog->phys;
462 input_dev->id.bustype = BUS_GAMEPORT;
463 input_dev->id.vendor = GAMEPORT_ID_VENDOR_ANALOG;
464 input_dev->id.product = analog->mask >> 4;
465 input_dev->id.version = 0x0100;
466 input_dev->dev.parent = &port->gameport->dev;
467
468 input_set_drvdata(input_dev, port);
469
470 input_dev->open = analog_open;
471 input_dev->close = analog_close;
472
473 input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
474
475 for (i = j = 0; i < 4; i++)
476 if (analog->mask & (1 << i)) {
477
478 t = analog_axes[j];
479 x = port->axes[i];
480 y = (port->axes[0] + port->axes[1]) >> 1;
481 z = y - port->axes[i];
482 z = z > 0 ? z : -z;
483 v = (x >> 3);
484 w = (x >> 3);
485
486 if ((i == 2 || i == 3) && (j == 2 || j == 3) && (z > (y >> 3)))
487 x = y;
488
489 if (analog->mask & ANALOG_SAITEK) {
490 if (i == 2) x = port->axes[i];
491 v = x - (x >> 2);
492 w = (x >> 4);
493 }
494
495 input_set_abs_params(input_dev, t, v, (x << 1) - v, port->fuzz, w);
496 j++;
497 }
498
499 for (i = j = 0; i < 3; i++)
500 if (analog->mask & analog_exts[i])
501 for (x = 0; x < 2; x++) {
502 t = analog_hats[j++];
503 input_set_abs_params(input_dev, t, -1, 1, 0, 0);
504 }
505
506 for (i = j = 0; i < 4; i++)
507 if (analog->mask & (0x10 << i))
508 set_bit(analog->buttons[j++], input_dev->keybit);
509
510 if (analog->mask & ANALOG_BTNS_CHF)
511 for (i = 0; i < 2; i++)
512 set_bit(analog->buttons[j++], input_dev->keybit);
513
514 if (analog->mask & ANALOG_HBTN_CHF)
515 for (i = 0; i < 4; i++)
516 set_bit(analog->buttons[j++], input_dev->keybit);
517
518 for (i = 0; i < 4; i++)
519 if (analog->mask & (ANALOG_BTN_TL << i))
520 set_bit(analog_pads[i], input_dev->keybit);
521
522 analog_decode(analog, port->axes, port->initial, port->buttons);
523
524 error = input_register_device(analog->dev);
525 if (error) {
526 input_free_device(analog->dev);
527 return error;
528 }
529
530 return 0;
531 }
532
533 /*
534 * analog_init_devices() sets up device-specific values and registers the input devices.
535 */
536
analog_init_masks(struct analog_port * port)537 static int analog_init_masks(struct analog_port *port)
538 {
539 int i;
540 struct analog *analog = port->analog;
541 int max[4];
542
543 if (!port->mask)
544 return -1;
545
546 if ((port->mask & 3) != 3 && port->mask != 0xc) {
547 printk(KERN_WARNING "analog.c: Unknown joystick device found "
548 "(data=%#x, %s), probably not analog joystick.\n",
549 port->mask, port->gameport->phys);
550 return -1;
551 }
552
553
554 i = analog_options[0]; /* FIXME !!! - need to specify options for different ports */
555
556 analog[0].mask = i & 0xfffff;
557
558 analog[0].mask &= ~(ANALOG_AXES_STD | ANALOG_HAT_FCS | ANALOG_BTNS_GAMEPAD)
559 | port->mask | ((port->mask << 8) & ANALOG_HAT_FCS)
560 | ((port->mask << 10) & ANALOG_BTNS_TLR) | ((port->mask << 12) & ANALOG_BTNS_TLR2);
561
562 analog[0].mask &= ~(ANALOG_HAT2_CHF)
563 | ((analog[0].mask & ANALOG_HBTN_CHF) ? 0 : ANALOG_HAT2_CHF);
564
565 analog[0].mask &= ~(ANALOG_THROTTLE | ANALOG_BTN_TR | ANALOG_BTN_TR2)
566 | ((~analog[0].mask & ANALOG_HAT_FCS) >> 8)
567 | ((~analog[0].mask & ANALOG_HAT_FCS) << 2)
568 | ((~analog[0].mask & ANALOG_HAT_FCS) << 4);
569
570 analog[0].mask &= ~(ANALOG_THROTTLE | ANALOG_RUDDER)
571 | (((~analog[0].mask & ANALOG_BTNS_TLR ) >> 10)
572 & ((~analog[0].mask & ANALOG_BTNS_TLR2) >> 12));
573
574 analog[1].mask = ((i >> 20) & 0xff) | ((i >> 12) & 0xf0000);
575
576 analog[1].mask &= (analog[0].mask & ANALOG_EXTENSIONS) ? ANALOG_GAMEPAD
577 : (((ANALOG_BTNS_STD | port->mask) & ~analog[0].mask) | ANALOG_GAMEPAD);
578
579 if (port->cooked) {
580
581 for (i = 0; i < 4; i++) max[i] = port->axes[i] << 1;
582
583 if ((analog[0].mask & 0x7) == 0x7) max[2] = (max[0] + max[1]) >> 1;
584 if ((analog[0].mask & 0xb) == 0xb) max[3] = (max[0] + max[1]) >> 1;
585 if ((analog[0].mask & ANALOG_BTN_TL) && !(analog[0].mask & ANALOG_BTN_TL2)) max[2] >>= 1;
586 if ((analog[0].mask & ANALOG_BTN_TR) && !(analog[0].mask & ANALOG_BTN_TR2)) max[3] >>= 1;
587 if ((analog[0].mask & ANALOG_HAT_FCS)) max[3] >>= 1;
588
589 gameport_calibrate(port->gameport, port->axes, max);
590 }
591
592 for (i = 0; i < 4; i++)
593 port->initial[i] = port->axes[i];
594
595 return -!(analog[0].mask || analog[1].mask);
596 }
597
analog_init_port(struct gameport * gameport,struct gameport_driver * drv,struct analog_port * port)598 static int analog_init_port(struct gameport *gameport, struct gameport_driver *drv, struct analog_port *port)
599 {
600 int i, t, u, v;
601
602 port->gameport = gameport;
603
604 gameport_set_drvdata(gameport, port);
605
606 if (!gameport_open(gameport, drv, GAMEPORT_MODE_RAW)) {
607
608 analog_calibrate_timer(port);
609
610 gameport_trigger(gameport);
611 t = gameport_read(gameport);
612 msleep(ANALOG_MAX_TIME);
613 port->mask = (gameport_read(gameport) ^ t) & t & 0xf;
614 port->fuzz = (port->speed * ANALOG_FUZZ_MAGIC) / port->loop / 1000 + ANALOG_FUZZ_BITS;
615
616 for (i = 0; i < ANALOG_INIT_RETRIES; i++) {
617 if (!analog_cooked_read(port))
618 break;
619 msleep(ANALOG_MAX_TIME);
620 }
621
622 u = v = 0;
623
624 msleep(ANALOG_MAX_TIME);
625 t = gameport_time(gameport, ANALOG_MAX_TIME * 1000);
626 gameport_trigger(gameport);
627 while ((gameport_read(port->gameport) & port->mask) && (u < t))
628 u++;
629 udelay(ANALOG_SAITEK_DELAY);
630 t = gameport_time(gameport, ANALOG_SAITEK_TIME);
631 gameport_trigger(gameport);
632 while ((gameport_read(port->gameport) & port->mask) && (v < t))
633 v++;
634
635 if (v < (u >> 1)) { /* FIXME - more than one port */
636 analog_options[0] |= /* FIXME - more than one port */
637 ANALOG_SAITEK | ANALOG_BTNS_CHF | ANALOG_HBTN_CHF | ANALOG_HAT1_CHF;
638 return 0;
639 }
640
641 gameport_close(gameport);
642 }
643
644 if (!gameport_open(gameport, drv, GAMEPORT_MODE_COOKED)) {
645
646 for (i = 0; i < ANALOG_INIT_RETRIES; i++)
647 if (!gameport_cooked_read(gameport, port->axes, &port->buttons))
648 break;
649 for (i = 0; i < 4; i++)
650 if (port->axes[i] != -1)
651 port->mask |= 1 << i;
652
653 port->fuzz = gameport->fuzz;
654 port->cooked = 1;
655 return 0;
656 }
657
658 return gameport_open(gameport, drv, GAMEPORT_MODE_RAW);
659 }
660
analog_connect(struct gameport * gameport,struct gameport_driver * drv)661 static int analog_connect(struct gameport *gameport, struct gameport_driver *drv)
662 {
663 struct analog_port *port;
664 int i;
665 int err;
666
667 if (!(port = kzalloc(sizeof(struct analog_port), GFP_KERNEL)))
668 return -ENOMEM;
669
670 err = analog_init_port(gameport, drv, port);
671 if (err)
672 goto fail1;
673
674 err = analog_init_masks(port);
675 if (err)
676 goto fail2;
677
678 gameport_set_poll_handler(gameport, analog_poll);
679 gameport_set_poll_interval(gameport, 10);
680
681 for (i = 0; i < 2; i++)
682 if (port->analog[i].mask) {
683 err = analog_init_device(port, port->analog + i, i);
684 if (err)
685 goto fail3;
686 }
687
688 return 0;
689
690 fail3: while (--i >= 0)
691 if (port->analog[i].mask)
692 input_unregister_device(port->analog[i].dev);
693 fail2: gameport_close(gameport);
694 fail1: gameport_set_drvdata(gameport, NULL);
695 kfree(port);
696 return err;
697 }
698
analog_disconnect(struct gameport * gameport)699 static void analog_disconnect(struct gameport *gameport)
700 {
701 struct analog_port *port = gameport_get_drvdata(gameport);
702 int i;
703
704 for (i = 0; i < 2; i++)
705 if (port->analog[i].mask)
706 input_unregister_device(port->analog[i].dev);
707 gameport_close(gameport);
708 gameport_set_drvdata(gameport, NULL);
709 printk(KERN_INFO "analog.c: %d out of %d reads (%d%%) on %s failed\n",
710 port->bads, port->reads, port->reads ? (port->bads * 100 / port->reads) : 0,
711 port->gameport->phys);
712 kfree(port);
713 }
714
715 struct analog_types {
716 char *name;
717 int value;
718 };
719
720 static struct analog_types analog_types[] = {
721 { "none", 0x00000000 },
722 { "auto", 0x000000ff },
723 { "2btn", 0x0000003f },
724 { "y-joy", 0x0cc00033 },
725 { "y-pad", 0x8cc80033 },
726 { "fcs", 0x000008f7 },
727 { "chf", 0x000002ff },
728 { "fullchf", 0x000007ff },
729 { "gamepad", 0x000830f3 },
730 { "gamepad8", 0x0008f0f3 },
731 { NULL, 0 }
732 };
733
analog_parse_options(void)734 static void analog_parse_options(void)
735 {
736 int i, j;
737 char *end;
738
739 for (i = 0; i < js_nargs; i++) {
740
741 for (j = 0; analog_types[j].name; j++)
742 if (!strcmp(analog_types[j].name, js[i])) {
743 analog_options[i] = analog_types[j].value;
744 break;
745 }
746 if (analog_types[j].name) continue;
747
748 analog_options[i] = simple_strtoul(js[i], &end, 0);
749 if (end != js[i]) continue;
750
751 analog_options[i] = 0xff;
752 if (!strlen(js[i])) continue;
753
754 printk(KERN_WARNING "analog.c: Bad config for port %d - \"%s\"\n", i, js[i]);
755 }
756
757 for (; i < ANALOG_PORTS; i++)
758 analog_options[i] = 0xff;
759 }
760
761 /*
762 * The gameport device structure.
763 */
764
765 static struct gameport_driver analog_drv = {
766 .driver = {
767 .name = "analog",
768 },
769 .description = DRIVER_DESC,
770 .connect = analog_connect,
771 .disconnect = analog_disconnect,
772 };
773
analog_init(void)774 static int __init analog_init(void)
775 {
776 analog_parse_options();
777 return gameport_register_driver(&analog_drv);
778 }
779
analog_exit(void)780 static void __exit analog_exit(void)
781 {
782 gameport_unregister_driver(&analog_drv);
783 }
784
785 module_init(analog_init);
786 module_exit(analog_exit);
787