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 | |
25 | MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>" ); |
26 | MODULE_DESCRIPTION(DRIVER_DESC); |
27 | MODULE_LICENSE("GPL" ); |
28 | |
29 | /* |
30 | * Option parsing. |
31 | */ |
32 | |
33 | #define ANALOG_PORTS 16 |
34 | |
35 | static char *js[ANALOG_PORTS]; |
36 | static unsigned int js_nargs; |
37 | static int analog_options[ANALOG_PORTS]; |
38 | module_param_array_named(map, js, charp, &js_nargs, 0); |
39 | MODULE_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 | |
81 | static short analog_axes[] = { ABS_X, ABS_Y, ABS_RUDDER, ABS_THROTTLE }; |
82 | static short analog_hats[] = { ABS_HAT0X, ABS_HAT0Y, ABS_HAT1X, ABS_HAT1Y, ABS_HAT2X, ABS_HAT2Y }; |
83 | static short analog_pads[] = { BTN_Y, BTN_Z, BTN_TL, BTN_TR }; |
84 | static short analog_exts[] = { ANALOG_HAT1_CHF, ANALOG_HAT2_CHF, ANALOG_HAT_FCS }; |
85 | 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 }; |
86 | static 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 | |
89 | static unsigned char analog_chf[] = { 0xf, 0x0, 0x1, 0x9, 0x2, 0x4, 0xc, 0x8, 0x3, 0x5, 0xb, 0x7, 0xd, 0xe, 0xa, 0x6 }; |
90 | |
91 | struct 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 | |
99 | struct 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 | |
119 | static 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, code: analog->buttons[j++], value: (buttons >> i) & 1); |
134 | |
135 | if (analog->mask & ANALOG_HBTN_CHF) |
136 | for (i = 0; i < 4; i++) |
137 | input_report_key(dev, code: analog->buttons[j++], value: (buttons >> (i + 10)) & 1); |
138 | |
139 | if (analog->mask & ANALOG_BTN_TL) |
140 | input_report_key(dev, code: analog_pads[0], value: axes[2] < (initial[2] >> 1)); |
141 | if (analog->mask & ANALOG_BTN_TR) |
142 | input_report_key(dev, code: analog_pads[1], value: axes[3] < (initial[3] >> 1)); |
143 | if (analog->mask & ANALOG_BTN_TL2) |
144 | input_report_key(dev, code: analog_pads[2], value: axes[2] > (initial[2] + (initial[2] >> 1))); |
145 | if (analog->mask & ANALOG_BTN_TR2) |
146 | input_report_key(dev, code: analog_pads[3], value: 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, code: analog_axes[j++], value: axes[i]); |
151 | |
152 | for (i = j = 0; i < 3; i++) |
153 | if (analog->mask & analog_exts[i]) { |
154 | input_report_abs(dev, code: analog_hats[j++], |
155 | value: ((buttons >> ((i << 2) + 7)) & 1) - ((buttons >> ((i << 2) + 9)) & 1)); |
156 | input_report_abs(dev, code: analog_hats[j++], |
157 | value: ((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 | |
167 | static 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 | |
217 | static 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(gameport: port->gameport, ANALOG_SAITEK_TIME); |
222 | |
223 | u = gameport_read(gameport: 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(gameport: port->gameport); |
238 | while (((u = gameport_read(gameport: 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 | |
249 | static 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(gameport: port->gameport, axes: port->axes, buttons: &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(analog: port->analog + i, axes: port->axes, initial: port->initial, buttons: port->buttons); |
277 | } |
278 | |
279 | /* |
280 | * analog_open() is a callback from the input open routine. |
281 | */ |
282 | |
283 | static int analog_open(struct input_dev *dev) |
284 | { |
285 | struct analog_port *port = input_get_drvdata(dev); |
286 | |
287 | gameport_start_polling(gameport: port->gameport); |
288 | return 0; |
289 | } |
290 | |
291 | /* |
292 | * analog_close() is a callback from the input close routine. |
293 | */ |
294 | |
295 | static void analog_close(struct input_dev *dev) |
296 | { |
297 | struct analog_port *port = input_get_drvdata(dev); |
298 | |
299 | gameport_stop_polling(gameport: 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 | |
307 | static 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 | |
337 | static void analog_name(struct analog *analog) |
338 | { |
339 | struct seq_buf s; |
340 | |
341 | seq_buf_init(s: &s, buf: analog->name, size: sizeof(analog->name)); |
342 | seq_buf_printf(s: &s, fmt: "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: &s, fmt: " %d-hat" , |
349 | hweight16(analog->mask & ANALOG_HATS_ALL)); |
350 | |
351 | if (analog->mask & ANALOG_HAT_FCS) |
352 | seq_buf_printf(s: &s, fmt: " FCS" ); |
353 | if (analog->mask & ANALOG_ANY_CHF) |
354 | seq_buf_printf(s: &s, fmt: (analog->mask & ANALOG_SAITEK) ? " Saitek" : " CHF" ); |
355 | |
356 | seq_buf_printf(s: &s, fmt: (analog->mask & ANALOG_GAMEPAD) ? " gamepad" : " joystick" ); |
357 | } |
358 | |
359 | /* |
360 | * analog_init_device() |
361 | */ |
362 | |
363 | static 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(buf: analog->phys, size: sizeof(analog->phys), |
371 | fmt: "%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(dev: input_dev, data: 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(dev: input_dev, axis: t, min: v, max: (x << 1) - v, fuzz: port->fuzz, flat: 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(dev: input_dev, axis: t, min: -1, max: 1, fuzz: 0, flat: 0); |
422 | } |
423 | |
424 | for (i = j = 0; i < 4; i++) |
425 | if (analog->mask & (0x10 << i)) |
426 | set_bit(nr: analog->buttons[j++], addr: input_dev->keybit); |
427 | |
428 | if (analog->mask & ANALOG_BTNS_CHF) |
429 | for (i = 0; i < 2; i++) |
430 | set_bit(nr: analog->buttons[j++], addr: input_dev->keybit); |
431 | |
432 | if (analog->mask & ANALOG_HBTN_CHF) |
433 | for (i = 0; i < 4; i++) |
434 | set_bit(nr: analog->buttons[j++], addr: input_dev->keybit); |
435 | |
436 | for (i = 0; i < 4; i++) |
437 | if (analog->mask & (ANALOG_BTN_TL << i)) |
438 | set_bit(nr: analog_pads[i], addr: input_dev->keybit); |
439 | |
440 | analog_decode(analog, axes: port->axes, initial: port->initial, buttons: port->buttons); |
441 | |
442 | error = input_register_device(analog->dev); |
443 | if (error) { |
444 | input_free_device(dev: 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 | |
455 | static 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(gameport: port->gameport, axes: 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 | |
516 | static 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, data: 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(gameport: 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(gameport: 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, axes: port->axes, buttons: &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 | |
579 | static 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(size: 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, handler: analog_poll); |
597 | gameport_set_poll_interval(gameport, msecs: 10); |
598 | |
599 | for (i = 0; i < 2; i++) |
600 | if (port->analog[i].mask) { |
601 | err = analog_init_device(port, analog: port->analog + i, index: 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(objp: port); |
614 | return err; |
615 | } |
616 | |
617 | static 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(objp: port); |
631 | } |
632 | |
633 | struct analog_types { |
634 | char *name; |
635 | int value; |
636 | }; |
637 | |
638 | static 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 | |
652 | static 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 | |
683 | static 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 | |
692 | static int __init analog_init(void) |
693 | { |
694 | analog_parse_options(); |
695 | return gameport_register_driver(&analog_drv); |
696 | } |
697 | |
698 | static void __exit analog_exit(void) |
699 | { |
700 | gameport_unregister_driver(drv: &analog_drv); |
701 | } |
702 | |
703 | module_init(analog_init); |
704 | module_exit(analog_exit); |
705 | |