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UBUNTU: Ubuntu-4.13.0-45.50
[mirror_ubuntu-artful-kernel.git] / drivers / hid / hid-wiimote-core.c
1 /*
2 * HID driver for Nintendo Wii / Wii U peripherals
3 * Copyright (c) 2011-2013 David Herrmann <dh.herrmann@gmail.com>
4 */
5
6 /*
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License as published by the Free
9 * Software Foundation; either version 2 of the License, or (at your option)
10 * any later version.
11 */
12
13 #include <linux/completion.h>
14 #include <linux/device.h>
15 #include <linux/hid.h>
16 #include <linux/input.h>
17 #include <linux/module.h>
18 #include <linux/mutex.h>
19 #include <linux/spinlock.h>
20 #include "hid-ids.h"
21 #include "hid-wiimote.h"
22
23 /* output queue handling */
24
25 static int wiimote_hid_send(struct hid_device *hdev, __u8 *buffer,
26 size_t count)
27 {
28 __u8 *buf;
29 int ret;
30
31 if (!hdev->ll_driver->output_report)
32 return -ENODEV;
33
34 buf = kmemdup(buffer, count, GFP_KERNEL);
35 if (!buf)
36 return -ENOMEM;
37
38 ret = hid_hw_output_report(hdev, buf, count);
39
40 kfree(buf);
41 return ret;
42 }
43
44 static void wiimote_queue_worker(struct work_struct *work)
45 {
46 struct wiimote_queue *queue = container_of(work, struct wiimote_queue,
47 worker);
48 struct wiimote_data *wdata = container_of(queue, struct wiimote_data,
49 queue);
50 unsigned long flags;
51 int ret;
52
53 spin_lock_irqsave(&wdata->queue.lock, flags);
54
55 while (wdata->queue.head != wdata->queue.tail) {
56 spin_unlock_irqrestore(&wdata->queue.lock, flags);
57 ret = wiimote_hid_send(wdata->hdev,
58 wdata->queue.outq[wdata->queue.tail].data,
59 wdata->queue.outq[wdata->queue.tail].size);
60 if (ret < 0) {
61 spin_lock_irqsave(&wdata->state.lock, flags);
62 wiimote_cmd_abort(wdata);
63 spin_unlock_irqrestore(&wdata->state.lock, flags);
64 }
65 spin_lock_irqsave(&wdata->queue.lock, flags);
66
67 wdata->queue.tail = (wdata->queue.tail + 1) % WIIMOTE_BUFSIZE;
68 }
69
70 spin_unlock_irqrestore(&wdata->queue.lock, flags);
71 }
72
73 static void wiimote_queue(struct wiimote_data *wdata, const __u8 *buffer,
74 size_t count)
75 {
76 unsigned long flags;
77 __u8 newhead;
78
79 if (count > HID_MAX_BUFFER_SIZE) {
80 hid_warn(wdata->hdev, "Sending too large output report\n");
81
82 spin_lock_irqsave(&wdata->queue.lock, flags);
83 goto out_error;
84 }
85
86 /*
87 * Copy new request into our output queue and check whether the
88 * queue is full. If it is full, discard this request.
89 * If it is empty we need to start a new worker that will
90 * send out the buffer to the hid device.
91 * If the queue is not empty, then there must be a worker
92 * that is currently sending out our buffer and this worker
93 * will reschedule itself until the queue is empty.
94 */
95
96 spin_lock_irqsave(&wdata->queue.lock, flags);
97
98 memcpy(wdata->queue.outq[wdata->queue.head].data, buffer, count);
99 wdata->queue.outq[wdata->queue.head].size = count;
100 newhead = (wdata->queue.head + 1) % WIIMOTE_BUFSIZE;
101
102 if (wdata->queue.head == wdata->queue.tail) {
103 wdata->queue.head = newhead;
104 schedule_work(&wdata->queue.worker);
105 } else if (newhead != wdata->queue.tail) {
106 wdata->queue.head = newhead;
107 } else {
108 hid_warn(wdata->hdev, "Output queue is full");
109 goto out_error;
110 }
111
112 goto out_unlock;
113
114 out_error:
115 wiimote_cmd_abort(wdata);
116 out_unlock:
117 spin_unlock_irqrestore(&wdata->queue.lock, flags);
118 }
119
120 /*
121 * This sets the rumble bit on the given output report if rumble is
122 * currently enabled.
123 * \cmd1 must point to the second byte in the output report => &cmd[1]
124 * This must be called on nearly every output report before passing it
125 * into the output queue!
126 */
127 static inline void wiiproto_keep_rumble(struct wiimote_data *wdata, __u8 *cmd1)
128 {
129 if (wdata->state.flags & WIIPROTO_FLAG_RUMBLE)
130 *cmd1 |= 0x01;
131 }
132
133 void wiiproto_req_rumble(struct wiimote_data *wdata, __u8 rumble)
134 {
135 __u8 cmd[2];
136
137 rumble = !!rumble;
138 if (rumble == !!(wdata->state.flags & WIIPROTO_FLAG_RUMBLE))
139 return;
140
141 if (rumble)
142 wdata->state.flags |= WIIPROTO_FLAG_RUMBLE;
143 else
144 wdata->state.flags &= ~WIIPROTO_FLAG_RUMBLE;
145
146 cmd[0] = WIIPROTO_REQ_RUMBLE;
147 cmd[1] = 0;
148
149 wiiproto_keep_rumble(wdata, &cmd[1]);
150 wiimote_queue(wdata, cmd, sizeof(cmd));
151 }
152
153 void wiiproto_req_leds(struct wiimote_data *wdata, int leds)
154 {
155 __u8 cmd[2];
156
157 leds &= WIIPROTO_FLAGS_LEDS;
158 if ((wdata->state.flags & WIIPROTO_FLAGS_LEDS) == leds)
159 return;
160 wdata->state.flags = (wdata->state.flags & ~WIIPROTO_FLAGS_LEDS) | leds;
161
162 cmd[0] = WIIPROTO_REQ_LED;
163 cmd[1] = 0;
164
165 if (leds & WIIPROTO_FLAG_LED1)
166 cmd[1] |= 0x10;
167 if (leds & WIIPROTO_FLAG_LED2)
168 cmd[1] |= 0x20;
169 if (leds & WIIPROTO_FLAG_LED3)
170 cmd[1] |= 0x40;
171 if (leds & WIIPROTO_FLAG_LED4)
172 cmd[1] |= 0x80;
173
174 wiiproto_keep_rumble(wdata, &cmd[1]);
175 wiimote_queue(wdata, cmd, sizeof(cmd));
176 }
177
178 /*
179 * Check what peripherals of the wiimote are currently
180 * active and select a proper DRM that supports all of
181 * the requested data inputs.
182 *
183 * Not all combinations are actually supported. The following
184 * combinations work only with limitations:
185 * - IR cam in extended or full mode disables any data transmission
186 * of extension controllers. There is no DRM mode that supports
187 * extension bytes plus extended/full IR.
188 * - IR cam with accelerometer and extension *_EXT8 is not supported.
189 * However, all extensions that need *_EXT8 are devices that don't
190 * support IR cameras. Hence, this shouldn't happen under normal
191 * operation.
192 * - *_EXT16 is only supported in combination with buttons and
193 * accelerometer. No IR or similar can be active simultaneously. As
194 * above, all modules that require it are mutually exclusive with
195 * IR/etc. so this doesn't matter.
196 */
197 static __u8 select_drm(struct wiimote_data *wdata)
198 {
199 __u8 ir = wdata->state.flags & WIIPROTO_FLAGS_IR;
200 bool ext;
201
202 ext = (wdata->state.flags & WIIPROTO_FLAG_EXT_USED) ||
203 (wdata->state.flags & WIIPROTO_FLAG_MP_USED);
204
205 /* some 3rd-party balance-boards are hard-coded to KEE, *sigh* */
206 if (wdata->state.devtype == WIIMOTE_DEV_BALANCE_BOARD) {
207 if (ext)
208 return WIIPROTO_REQ_DRM_KEE;
209 else
210 return WIIPROTO_REQ_DRM_K;
211 }
212
213 if (ir == WIIPROTO_FLAG_IR_BASIC) {
214 if (wdata->state.flags & WIIPROTO_FLAG_ACCEL) {
215 /* GEN10 and ealier devices bind IR formats to DRMs.
216 * Hence, we cannot use DRM_KAI here as it might be
217 * bound to IR_EXT. Use DRM_KAIE unconditionally so we
218 * work with all devices and our parsers can use the
219 * fixed formats, too. */
220 return WIIPROTO_REQ_DRM_KAIE;
221 } else {
222 return WIIPROTO_REQ_DRM_KIE;
223 }
224 } else if (ir == WIIPROTO_FLAG_IR_EXT) {
225 return WIIPROTO_REQ_DRM_KAI;
226 } else if (ir == WIIPROTO_FLAG_IR_FULL) {
227 return WIIPROTO_REQ_DRM_SKAI1;
228 } else {
229 if (wdata->state.flags & WIIPROTO_FLAG_ACCEL) {
230 if (ext)
231 return WIIPROTO_REQ_DRM_KAE;
232 else
233 return WIIPROTO_REQ_DRM_KA;
234 } else {
235 if (ext)
236 return WIIPROTO_REQ_DRM_KEE;
237 else
238 return WIIPROTO_REQ_DRM_K;
239 }
240 }
241 }
242
243 void wiiproto_req_drm(struct wiimote_data *wdata, __u8 drm)
244 {
245 __u8 cmd[3];
246
247 if (wdata->state.flags & WIIPROTO_FLAG_DRM_LOCKED)
248 drm = wdata->state.drm;
249 else if (drm == WIIPROTO_REQ_NULL)
250 drm = select_drm(wdata);
251
252 cmd[0] = WIIPROTO_REQ_DRM;
253 cmd[1] = 0;
254 cmd[2] = drm;
255
256 wdata->state.drm = drm;
257 wiiproto_keep_rumble(wdata, &cmd[1]);
258 wiimote_queue(wdata, cmd, sizeof(cmd));
259 }
260
261 void wiiproto_req_status(struct wiimote_data *wdata)
262 {
263 __u8 cmd[2];
264
265 cmd[0] = WIIPROTO_REQ_SREQ;
266 cmd[1] = 0;
267
268 wiiproto_keep_rumble(wdata, &cmd[1]);
269 wiimote_queue(wdata, cmd, sizeof(cmd));
270 }
271
272 void wiiproto_req_accel(struct wiimote_data *wdata, __u8 accel)
273 {
274 accel = !!accel;
275 if (accel == !!(wdata->state.flags & WIIPROTO_FLAG_ACCEL))
276 return;
277
278 if (accel)
279 wdata->state.flags |= WIIPROTO_FLAG_ACCEL;
280 else
281 wdata->state.flags &= ~WIIPROTO_FLAG_ACCEL;
282
283 wiiproto_req_drm(wdata, WIIPROTO_REQ_NULL);
284 }
285
286 void wiiproto_req_ir1(struct wiimote_data *wdata, __u8 flags)
287 {
288 __u8 cmd[2];
289
290 cmd[0] = WIIPROTO_REQ_IR1;
291 cmd[1] = flags;
292
293 wiiproto_keep_rumble(wdata, &cmd[1]);
294 wiimote_queue(wdata, cmd, sizeof(cmd));
295 }
296
297 void wiiproto_req_ir2(struct wiimote_data *wdata, __u8 flags)
298 {
299 __u8 cmd[2];
300
301 cmd[0] = WIIPROTO_REQ_IR2;
302 cmd[1] = flags;
303
304 wiiproto_keep_rumble(wdata, &cmd[1]);
305 wiimote_queue(wdata, cmd, sizeof(cmd));
306 }
307
308 #define wiiproto_req_wreg(wdata, os, buf, sz) \
309 wiiproto_req_wmem((wdata), false, (os), (buf), (sz))
310
311 #define wiiproto_req_weeprom(wdata, os, buf, sz) \
312 wiiproto_req_wmem((wdata), true, (os), (buf), (sz))
313
314 static void wiiproto_req_wmem(struct wiimote_data *wdata, bool eeprom,
315 __u32 offset, const __u8 *buf, __u8 size)
316 {
317 __u8 cmd[22];
318
319 if (size > 16 || size == 0) {
320 hid_warn(wdata->hdev, "Invalid length %d wmem request\n", size);
321 return;
322 }
323
324 memset(cmd, 0, sizeof(cmd));
325 cmd[0] = WIIPROTO_REQ_WMEM;
326 cmd[2] = (offset >> 16) & 0xff;
327 cmd[3] = (offset >> 8) & 0xff;
328 cmd[4] = offset & 0xff;
329 cmd[5] = size;
330 memcpy(&cmd[6], buf, size);
331
332 if (!eeprom)
333 cmd[1] |= 0x04;
334
335 wiiproto_keep_rumble(wdata, &cmd[1]);
336 wiimote_queue(wdata, cmd, sizeof(cmd));
337 }
338
339 void wiiproto_req_rmem(struct wiimote_data *wdata, bool eeprom, __u32 offset,
340 __u16 size)
341 {
342 __u8 cmd[7];
343
344 if (size == 0) {
345 hid_warn(wdata->hdev, "Invalid length %d rmem request\n", size);
346 return;
347 }
348
349 cmd[0] = WIIPROTO_REQ_RMEM;
350 cmd[1] = 0;
351 cmd[2] = (offset >> 16) & 0xff;
352 cmd[3] = (offset >> 8) & 0xff;
353 cmd[4] = offset & 0xff;
354 cmd[5] = (size >> 8) & 0xff;
355 cmd[6] = size & 0xff;
356
357 if (!eeprom)
358 cmd[1] |= 0x04;
359
360 wiiproto_keep_rumble(wdata, &cmd[1]);
361 wiimote_queue(wdata, cmd, sizeof(cmd));
362 }
363
364 /* requries the cmd-mutex to be held */
365 int wiimote_cmd_write(struct wiimote_data *wdata, __u32 offset,
366 const __u8 *wmem, __u8 size)
367 {
368 unsigned long flags;
369 int ret;
370
371 spin_lock_irqsave(&wdata->state.lock, flags);
372 wiimote_cmd_set(wdata, WIIPROTO_REQ_WMEM, 0);
373 wiiproto_req_wreg(wdata, offset, wmem, size);
374 spin_unlock_irqrestore(&wdata->state.lock, flags);
375
376 ret = wiimote_cmd_wait(wdata);
377 if (!ret && wdata->state.cmd_err)
378 ret = -EIO;
379
380 return ret;
381 }
382
383 /* requries the cmd-mutex to be held */
384 ssize_t wiimote_cmd_read(struct wiimote_data *wdata, __u32 offset, __u8 *rmem,
385 __u8 size)
386 {
387 unsigned long flags;
388 ssize_t ret;
389
390 spin_lock_irqsave(&wdata->state.lock, flags);
391 wdata->state.cmd_read_size = size;
392 wdata->state.cmd_read_buf = rmem;
393 wiimote_cmd_set(wdata, WIIPROTO_REQ_RMEM, offset & 0xffff);
394 wiiproto_req_rreg(wdata, offset, size);
395 spin_unlock_irqrestore(&wdata->state.lock, flags);
396
397 ret = wiimote_cmd_wait(wdata);
398
399 spin_lock_irqsave(&wdata->state.lock, flags);
400 wdata->state.cmd_read_buf = NULL;
401 spin_unlock_irqrestore(&wdata->state.lock, flags);
402
403 if (!ret) {
404 if (wdata->state.cmd_read_size == 0)
405 ret = -EIO;
406 else
407 ret = wdata->state.cmd_read_size;
408 }
409
410 return ret;
411 }
412
413 /* requires the cmd-mutex to be held */
414 static int wiimote_cmd_init_ext(struct wiimote_data *wdata)
415 {
416 __u8 wmem;
417 int ret;
418
419 /* initialize extension */
420 wmem = 0x55;
421 ret = wiimote_cmd_write(wdata, 0xa400f0, &wmem, sizeof(wmem));
422 if (ret)
423 return ret;
424
425 /* disable default encryption */
426 wmem = 0x0;
427 ret = wiimote_cmd_write(wdata, 0xa400fb, &wmem, sizeof(wmem));
428 if (ret)
429 return ret;
430
431 return 0;
432 }
433
434 /* requires the cmd-mutex to be held */
435 static __u8 wiimote_cmd_read_ext(struct wiimote_data *wdata, __u8 *rmem)
436 {
437 int ret;
438
439 /* read extension ID */
440 ret = wiimote_cmd_read(wdata, 0xa400fa, rmem, 6);
441 if (ret != 6)
442 return WIIMOTE_EXT_NONE;
443
444 hid_dbg(wdata->hdev, "extension ID: %6phC\n", rmem);
445
446 if (rmem[0] == 0xff && rmem[1] == 0xff && rmem[2] == 0xff &&
447 rmem[3] == 0xff && rmem[4] == 0xff && rmem[5] == 0xff)
448 return WIIMOTE_EXT_NONE;
449
450 if (rmem[4] == 0x00 && rmem[5] == 0x00)
451 return WIIMOTE_EXT_NUNCHUK;
452 if (rmem[4] == 0x01 && rmem[5] == 0x01)
453 return WIIMOTE_EXT_CLASSIC_CONTROLLER;
454 if (rmem[4] == 0x04 && rmem[5] == 0x02)
455 return WIIMOTE_EXT_BALANCE_BOARD;
456 if (rmem[4] == 0x01 && rmem[5] == 0x20)
457 return WIIMOTE_EXT_PRO_CONTROLLER;
458
459 return WIIMOTE_EXT_UNKNOWN;
460 }
461
462 /* requires the cmd-mutex to be held */
463 static int wiimote_cmd_init_mp(struct wiimote_data *wdata)
464 {
465 __u8 wmem;
466 int ret;
467
468 /* initialize MP */
469 wmem = 0x55;
470 ret = wiimote_cmd_write(wdata, 0xa600f0, &wmem, sizeof(wmem));
471 if (ret)
472 return ret;
473
474 /* disable default encryption */
475 wmem = 0x0;
476 ret = wiimote_cmd_write(wdata, 0xa600fb, &wmem, sizeof(wmem));
477 if (ret)
478 return ret;
479
480 return 0;
481 }
482
483 /* requires the cmd-mutex to be held */
484 static bool wiimote_cmd_map_mp(struct wiimote_data *wdata, __u8 exttype)
485 {
486 __u8 wmem;
487
488 /* map MP with correct pass-through mode */
489 switch (exttype) {
490 case WIIMOTE_EXT_CLASSIC_CONTROLLER:
491 wmem = 0x07;
492 break;
493 case WIIMOTE_EXT_NUNCHUK:
494 wmem = 0x05;
495 break;
496 default:
497 wmem = 0x04;
498 break;
499 }
500
501 return wiimote_cmd_write(wdata, 0xa600fe, &wmem, sizeof(wmem));
502 }
503
504 /* requires the cmd-mutex to be held */
505 static bool wiimote_cmd_read_mp(struct wiimote_data *wdata, __u8 *rmem)
506 {
507 int ret;
508
509 /* read motion plus ID */
510 ret = wiimote_cmd_read(wdata, 0xa600fa, rmem, 6);
511 if (ret != 6)
512 return false;
513
514 hid_dbg(wdata->hdev, "motion plus ID: %6phC\n", rmem);
515
516 if (rmem[5] == 0x05)
517 return true;
518
519 hid_info(wdata->hdev, "unknown motion plus ID: %6phC\n", rmem);
520
521 return false;
522 }
523
524 /* requires the cmd-mutex to be held */
525 static __u8 wiimote_cmd_read_mp_mapped(struct wiimote_data *wdata)
526 {
527 int ret;
528 __u8 rmem[6];
529
530 /* read motion plus ID */
531 ret = wiimote_cmd_read(wdata, 0xa400fa, rmem, 6);
532 if (ret != 6)
533 return WIIMOTE_MP_NONE;
534
535 hid_dbg(wdata->hdev, "mapped motion plus ID: %6phC\n", rmem);
536
537 if (rmem[0] == 0xff && rmem[1] == 0xff && rmem[2] == 0xff &&
538 rmem[3] == 0xff && rmem[4] == 0xff && rmem[5] == 0xff)
539 return WIIMOTE_MP_NONE;
540
541 if (rmem[4] == 0x04 && rmem[5] == 0x05)
542 return WIIMOTE_MP_SINGLE;
543 else if (rmem[4] == 0x05 && rmem[5] == 0x05)
544 return WIIMOTE_MP_PASSTHROUGH_NUNCHUK;
545 else if (rmem[4] == 0x07 && rmem[5] == 0x05)
546 return WIIMOTE_MP_PASSTHROUGH_CLASSIC;
547
548 return WIIMOTE_MP_UNKNOWN;
549 }
550
551 /* device module handling */
552
553 static const __u8 * const wiimote_devtype_mods[WIIMOTE_DEV_NUM] = {
554 [WIIMOTE_DEV_PENDING] = (const __u8[]){
555 WIIMOD_NULL,
556 },
557 [WIIMOTE_DEV_UNKNOWN] = (const __u8[]){
558 WIIMOD_NO_MP,
559 WIIMOD_NULL,
560 },
561 [WIIMOTE_DEV_GENERIC] = (const __u8[]){
562 WIIMOD_KEYS,
563 WIIMOD_RUMBLE,
564 WIIMOD_BATTERY,
565 WIIMOD_LED1,
566 WIIMOD_LED2,
567 WIIMOD_LED3,
568 WIIMOD_LED4,
569 WIIMOD_ACCEL,
570 WIIMOD_IR,
571 WIIMOD_NULL,
572 },
573 [WIIMOTE_DEV_GEN10] = (const __u8[]){
574 WIIMOD_KEYS,
575 WIIMOD_RUMBLE,
576 WIIMOD_BATTERY,
577 WIIMOD_LED1,
578 WIIMOD_LED2,
579 WIIMOD_LED3,
580 WIIMOD_LED4,
581 WIIMOD_ACCEL,
582 WIIMOD_IR,
583 WIIMOD_NULL,
584 },
585 [WIIMOTE_DEV_GEN20] = (const __u8[]){
586 WIIMOD_KEYS,
587 WIIMOD_RUMBLE,
588 WIIMOD_BATTERY,
589 WIIMOD_LED1,
590 WIIMOD_LED2,
591 WIIMOD_LED3,
592 WIIMOD_LED4,
593 WIIMOD_ACCEL,
594 WIIMOD_IR,
595 WIIMOD_BUILTIN_MP,
596 WIIMOD_NULL,
597 },
598 [WIIMOTE_DEV_BALANCE_BOARD] = (const __u8[]) {
599 WIIMOD_BATTERY,
600 WIIMOD_LED1,
601 WIIMOD_NO_MP,
602 WIIMOD_NULL,
603 },
604 [WIIMOTE_DEV_PRO_CONTROLLER] = (const __u8[]) {
605 WIIMOD_BATTERY,
606 WIIMOD_LED1,
607 WIIMOD_LED2,
608 WIIMOD_LED3,
609 WIIMOD_LED4,
610 WIIMOD_NO_MP,
611 WIIMOD_NULL,
612 },
613 };
614
615 static void wiimote_modules_load(struct wiimote_data *wdata,
616 unsigned int devtype)
617 {
618 bool need_input = false;
619 const __u8 *mods, *iter;
620 const struct wiimod_ops *ops;
621 int ret;
622
623 mods = wiimote_devtype_mods[devtype];
624
625 for (iter = mods; *iter != WIIMOD_NULL; ++iter) {
626 if (wiimod_table[*iter]->flags & WIIMOD_FLAG_INPUT) {
627 need_input = true;
628 break;
629 }
630 }
631
632 if (need_input) {
633 wdata->input = input_allocate_device();
634 if (!wdata->input)
635 return;
636
637 input_set_drvdata(wdata->input, wdata);
638 wdata->input->dev.parent = &wdata->hdev->dev;
639 wdata->input->id.bustype = wdata->hdev->bus;
640 wdata->input->id.vendor = wdata->hdev->vendor;
641 wdata->input->id.product = wdata->hdev->product;
642 wdata->input->id.version = wdata->hdev->version;
643 wdata->input->name = WIIMOTE_NAME;
644 }
645
646 for (iter = mods; *iter != WIIMOD_NULL; ++iter) {
647 ops = wiimod_table[*iter];
648 if (!ops->probe)
649 continue;
650
651 ret = ops->probe(ops, wdata);
652 if (ret)
653 goto error;
654 }
655
656 if (wdata->input) {
657 ret = input_register_device(wdata->input);
658 if (ret)
659 goto error;
660 }
661
662 spin_lock_irq(&wdata->state.lock);
663 wdata->state.devtype = devtype;
664 spin_unlock_irq(&wdata->state.lock);
665 return;
666
667 error:
668 for ( ; iter-- != mods; ) {
669 ops = wiimod_table[*iter];
670 if (ops->remove)
671 ops->remove(ops, wdata);
672 }
673
674 if (wdata->input) {
675 input_free_device(wdata->input);
676 wdata->input = NULL;
677 }
678 }
679
680 static void wiimote_modules_unload(struct wiimote_data *wdata)
681 {
682 const __u8 *mods, *iter;
683 const struct wiimod_ops *ops;
684 unsigned long flags;
685
686 mods = wiimote_devtype_mods[wdata->state.devtype];
687
688 spin_lock_irqsave(&wdata->state.lock, flags);
689 wdata->state.devtype = WIIMOTE_DEV_UNKNOWN;
690 spin_unlock_irqrestore(&wdata->state.lock, flags);
691
692 /* find end of list */
693 for (iter = mods; *iter != WIIMOD_NULL; ++iter)
694 /* empty */ ;
695
696 if (wdata->input) {
697 input_get_device(wdata->input);
698 input_unregister_device(wdata->input);
699 }
700
701 for ( ; iter-- != mods; ) {
702 ops = wiimod_table[*iter];
703 if (ops->remove)
704 ops->remove(ops, wdata);
705 }
706
707 if (wdata->input) {
708 input_put_device(wdata->input);
709 wdata->input = NULL;
710 }
711 }
712
713 /* device extension handling */
714
715 static void wiimote_ext_load(struct wiimote_data *wdata, unsigned int ext)
716 {
717 unsigned long flags;
718 const struct wiimod_ops *ops;
719 int ret;
720
721 ops = wiimod_ext_table[ext];
722
723 if (ops->probe) {
724 ret = ops->probe(ops, wdata);
725 if (ret)
726 ext = WIIMOTE_EXT_UNKNOWN;
727 }
728
729 spin_lock_irqsave(&wdata->state.lock, flags);
730 wdata->state.exttype = ext;
731 spin_unlock_irqrestore(&wdata->state.lock, flags);
732 }
733
734 static void wiimote_ext_unload(struct wiimote_data *wdata)
735 {
736 unsigned long flags;
737 const struct wiimod_ops *ops;
738
739 ops = wiimod_ext_table[wdata->state.exttype];
740
741 spin_lock_irqsave(&wdata->state.lock, flags);
742 wdata->state.exttype = WIIMOTE_EXT_UNKNOWN;
743 wdata->state.flags &= ~WIIPROTO_FLAG_EXT_USED;
744 spin_unlock_irqrestore(&wdata->state.lock, flags);
745
746 if (ops->remove)
747 ops->remove(ops, wdata);
748 }
749
750 static void wiimote_mp_load(struct wiimote_data *wdata)
751 {
752 unsigned long flags;
753 const struct wiimod_ops *ops;
754 int ret;
755 __u8 mode = 2;
756
757 ops = &wiimod_mp;
758 if (ops->probe) {
759 ret = ops->probe(ops, wdata);
760 if (ret)
761 mode = 1;
762 }
763
764 spin_lock_irqsave(&wdata->state.lock, flags);
765 wdata->state.mp = mode;
766 spin_unlock_irqrestore(&wdata->state.lock, flags);
767 }
768
769 static void wiimote_mp_unload(struct wiimote_data *wdata)
770 {
771 unsigned long flags;
772 const struct wiimod_ops *ops;
773
774 if (wdata->state.mp < 2)
775 return;
776
777 ops = &wiimod_mp;
778
779 spin_lock_irqsave(&wdata->state.lock, flags);
780 wdata->state.mp = 0;
781 wdata->state.flags &= ~WIIPROTO_FLAG_MP_USED;
782 spin_unlock_irqrestore(&wdata->state.lock, flags);
783
784 if (ops->remove)
785 ops->remove(ops, wdata);
786 }
787
788 /* device (re-)initialization and detection */
789
790 static const char *wiimote_devtype_names[WIIMOTE_DEV_NUM] = {
791 [WIIMOTE_DEV_PENDING] = "Pending",
792 [WIIMOTE_DEV_UNKNOWN] = "Unknown",
793 [WIIMOTE_DEV_GENERIC] = "Generic",
794 [WIIMOTE_DEV_GEN10] = "Nintendo Wii Remote (Gen 1)",
795 [WIIMOTE_DEV_GEN20] = "Nintendo Wii Remote Plus (Gen 2)",
796 [WIIMOTE_DEV_BALANCE_BOARD] = "Nintendo Wii Balance Board",
797 [WIIMOTE_DEV_PRO_CONTROLLER] = "Nintendo Wii U Pro Controller",
798 };
799
800 /* Try to guess the device type based on all collected information. We
801 * first try to detect by static extension types, then VID/PID and the
802 * device name. If we cannot detect the device, we use
803 * WIIMOTE_DEV_GENERIC so all modules will get probed on the device. */
804 static void wiimote_init_set_type(struct wiimote_data *wdata,
805 __u8 exttype)
806 {
807 __u8 devtype = WIIMOTE_DEV_GENERIC;
808 __u16 vendor, product;
809 const char *name;
810
811 vendor = wdata->hdev->vendor;
812 product = wdata->hdev->product;
813 name = wdata->hdev->name;
814
815 if (exttype == WIIMOTE_EXT_BALANCE_BOARD) {
816 devtype = WIIMOTE_DEV_BALANCE_BOARD;
817 goto done;
818 } else if (exttype == WIIMOTE_EXT_PRO_CONTROLLER) {
819 devtype = WIIMOTE_DEV_PRO_CONTROLLER;
820 goto done;
821 }
822
823 if (!strcmp(name, "Nintendo RVL-CNT-01")) {
824 devtype = WIIMOTE_DEV_GEN10;
825 goto done;
826 } else if (!strcmp(name, "Nintendo RVL-CNT-01-TR")) {
827 devtype = WIIMOTE_DEV_GEN20;
828 goto done;
829 } else if (!strcmp(name, "Nintendo RVL-WBC-01")) {
830 devtype = WIIMOTE_DEV_BALANCE_BOARD;
831 goto done;
832 } else if (!strcmp(name, "Nintendo RVL-CNT-01-UC")) {
833 devtype = WIIMOTE_DEV_PRO_CONTROLLER;
834 goto done;
835 }
836
837 if (vendor == USB_VENDOR_ID_NINTENDO) {
838 if (product == USB_DEVICE_ID_NINTENDO_WIIMOTE) {
839 devtype = WIIMOTE_DEV_GEN10;
840 goto done;
841 } else if (product == USB_DEVICE_ID_NINTENDO_WIIMOTE2) {
842 devtype = WIIMOTE_DEV_GEN20;
843 goto done;
844 }
845 }
846
847 done:
848 if (devtype == WIIMOTE_DEV_GENERIC)
849 hid_info(wdata->hdev, "cannot detect device; NAME: %s VID: %04x PID: %04x EXT: %04x\n",
850 name, vendor, product, exttype);
851 else
852 hid_info(wdata->hdev, "detected device: %s\n",
853 wiimote_devtype_names[devtype]);
854
855 wiimote_modules_load(wdata, devtype);
856 }
857
858 static void wiimote_init_detect(struct wiimote_data *wdata)
859 {
860 __u8 exttype = WIIMOTE_EXT_NONE, extdata[6];
861 bool ext;
862 int ret;
863
864 wiimote_cmd_acquire_noint(wdata);
865
866 spin_lock_irq(&wdata->state.lock);
867 wdata->state.devtype = WIIMOTE_DEV_UNKNOWN;
868 wiimote_cmd_set(wdata, WIIPROTO_REQ_SREQ, 0);
869 wiiproto_req_status(wdata);
870 spin_unlock_irq(&wdata->state.lock);
871
872 ret = wiimote_cmd_wait_noint(wdata);
873 if (ret)
874 goto out_release;
875
876 spin_lock_irq(&wdata->state.lock);
877 ext = wdata->state.flags & WIIPROTO_FLAG_EXT_PLUGGED;
878 spin_unlock_irq(&wdata->state.lock);
879
880 if (!ext)
881 goto out_release;
882
883 wiimote_cmd_init_ext(wdata);
884 exttype = wiimote_cmd_read_ext(wdata, extdata);
885
886 out_release:
887 wiimote_cmd_release(wdata);
888 wiimote_init_set_type(wdata, exttype);
889
890 /* schedule MP timer */
891 spin_lock_irq(&wdata->state.lock);
892 if (!(wdata->state.flags & WIIPROTO_FLAG_BUILTIN_MP) &&
893 !(wdata->state.flags & WIIPROTO_FLAG_NO_MP))
894 mod_timer(&wdata->timer, jiffies + HZ * 4);
895 spin_unlock_irq(&wdata->state.lock);
896 }
897
898 /*
899 * MP hotplug events are not generated by the wiimote. Therefore, we need
900 * polling to detect it. We use a 4s interval for polling MP registers. This
901 * seems reasonable considering applications can trigger it manually via
902 * sysfs requests.
903 */
904 static void wiimote_init_poll_mp(struct wiimote_data *wdata)
905 {
906 bool mp;
907 __u8 mpdata[6];
908
909 wiimote_cmd_acquire_noint(wdata);
910 wiimote_cmd_init_mp(wdata);
911 mp = wiimote_cmd_read_mp(wdata, mpdata);
912 wiimote_cmd_release(wdata);
913
914 /* load/unload MP module if it changed */
915 if (mp) {
916 if (!wdata->state.mp) {
917 hid_info(wdata->hdev, "detected extension: Nintendo Wii Motion Plus\n");
918 wiimote_mp_load(wdata);
919 }
920 } else if (wdata->state.mp) {
921 wiimote_mp_unload(wdata);
922 }
923
924 mod_timer(&wdata->timer, jiffies + HZ * 4);
925 }
926
927 /*
928 * Check whether the wiimote is in the expected state. The extension registers
929 * may change during hotplug and initialization so we might get hotplug events
930 * that we caused by remapping some memory.
931 * We use some heuristics here to check known states. If the wiimote is in the
932 * expected state, we can ignore the hotplug event.
933 *
934 * Returns "true" if the device is in expected state, "false" if we should
935 * redo hotplug handling and extension initialization.
936 */
937 static bool wiimote_init_check(struct wiimote_data *wdata)
938 {
939 __u32 flags;
940 __u8 type, data[6];
941 bool ret, poll_mp;
942
943 spin_lock_irq(&wdata->state.lock);
944 flags = wdata->state.flags;
945 spin_unlock_irq(&wdata->state.lock);
946
947 wiimote_cmd_acquire_noint(wdata);
948
949 /* If MP is used and active, but the extension is not, we expect:
950 * read_mp_mapped() == WIIMOTE_MP_SINGLE
951 * state.flags == !EXT_ACTIVE && !MP_PLUGGED && MP_ACTIVE
952 * We do not check EXT_PLUGGED because it might change during
953 * initialization of MP without extensions.
954 * - If MP is unplugged/replugged, read_mp_mapped() fails
955 * - If EXT is plugged, MP_PLUGGED will get set */
956 if (wdata->state.exttype == WIIMOTE_EXT_NONE &&
957 wdata->state.mp > 0 && (flags & WIIPROTO_FLAG_MP_USED)) {
958 type = wiimote_cmd_read_mp_mapped(wdata);
959 ret = type == WIIMOTE_MP_SINGLE;
960
961 spin_lock_irq(&wdata->state.lock);
962 ret = ret && !(wdata->state.flags & WIIPROTO_FLAG_EXT_ACTIVE);
963 ret = ret && !(wdata->state.flags & WIIPROTO_FLAG_MP_PLUGGED);
964 ret = ret && (wdata->state.flags & WIIPROTO_FLAG_MP_ACTIVE);
965 spin_unlock_irq(&wdata->state.lock);
966
967 if (!ret)
968 hid_dbg(wdata->hdev, "state left: !EXT && MP\n");
969
970 /* while MP is mapped, we get EXT_PLUGGED events */
971 poll_mp = false;
972
973 goto out_release;
974 }
975
976 /* If MP is unused, but the extension port is used, we expect:
977 * read_ext == state.exttype
978 * state.flags == !MP_ACTIVE && EXT_ACTIVE
979 * - If MP is plugged/unplugged, our timer detects it
980 * - If EXT is unplugged/replugged, EXT_ACTIVE will become unset */
981 if (!(flags & WIIPROTO_FLAG_MP_USED) &&
982 wdata->state.exttype != WIIMOTE_EXT_NONE) {
983 type = wiimote_cmd_read_ext(wdata, data);
984 ret = type == wdata->state.exttype;
985
986 spin_lock_irq(&wdata->state.lock);
987 ret = ret && !(wdata->state.flags & WIIPROTO_FLAG_MP_ACTIVE);
988 ret = ret && (wdata->state.flags & WIIPROTO_FLAG_EXT_ACTIVE);
989 spin_unlock_irq(&wdata->state.lock);
990
991 if (!ret)
992 hid_dbg(wdata->hdev, "state left: EXT && !MP\n");
993
994 /* poll MP for hotplug events */
995 poll_mp = true;
996
997 goto out_release;
998 }
999
1000 /* If neither MP nor an extension are used, we expect:
1001 * read_ext() == WIIMOTE_EXT_NONE
1002 * state.flags == !MP_ACTIVE && !EXT_ACTIVE && !EXT_PLUGGED
1003 * No need to perform any action in this case as everything is
1004 * disabled already.
1005 * - If MP is plugged/unplugged, our timer detects it
1006 * - If EXT is plugged, EXT_PLUGGED will be set */
1007 if (!(flags & WIIPROTO_FLAG_MP_USED) &&
1008 wdata->state.exttype == WIIMOTE_EXT_NONE) {
1009 type = wiimote_cmd_read_ext(wdata, data);
1010 ret = type == wdata->state.exttype;
1011
1012 spin_lock_irq(&wdata->state.lock);
1013 ret = ret && !(wdata->state.flags & WIIPROTO_FLAG_EXT_ACTIVE);
1014 ret = ret && !(wdata->state.flags & WIIPROTO_FLAG_MP_ACTIVE);
1015 ret = ret && !(wdata->state.flags & WIIPROTO_FLAG_EXT_PLUGGED);
1016 spin_unlock_irq(&wdata->state.lock);
1017
1018 if (!ret)
1019 hid_dbg(wdata->hdev, "state left: !EXT && !MP\n");
1020
1021 /* poll MP for hotplug events */
1022 poll_mp = true;
1023
1024 goto out_release;
1025 }
1026
1027 /* The trickiest part is if both EXT and MP are active. We cannot read
1028 * the EXT ID, anymore, because MP is mapped over it. However, we use
1029 * a handy trick here:
1030 * - EXT_ACTIVE is unset whenever !MP_PLUGGED is sent
1031 * MP_PLUGGED might be re-sent again before we are scheduled, but
1032 * EXT_ACTIVE will stay unset.
1033 * So it is enough to check for mp_mapped() and MP_ACTIVE and
1034 * EXT_ACTIVE. EXT_PLUGGED is a sanity check. */
1035 if (wdata->state.exttype != WIIMOTE_EXT_NONE &&
1036 wdata->state.mp > 0 && (flags & WIIPROTO_FLAG_MP_USED)) {
1037 type = wiimote_cmd_read_mp_mapped(wdata);
1038 ret = type != WIIMOTE_MP_NONE;
1039 ret = ret && type != WIIMOTE_MP_UNKNOWN;
1040 ret = ret && type != WIIMOTE_MP_SINGLE;
1041
1042 spin_lock_irq(&wdata->state.lock);
1043 ret = ret && (wdata->state.flags & WIIPROTO_FLAG_EXT_PLUGGED);
1044 ret = ret && (wdata->state.flags & WIIPROTO_FLAG_EXT_ACTIVE);
1045 ret = ret && (wdata->state.flags & WIIPROTO_FLAG_MP_ACTIVE);
1046 spin_unlock_irq(&wdata->state.lock);
1047
1048 if (!ret)
1049 hid_dbg(wdata->hdev, "state left: EXT && MP\n");
1050
1051 /* while MP is mapped, we get EXT_PLUGGED events */
1052 poll_mp = false;
1053
1054 goto out_release;
1055 }
1056
1057 /* unknown state */
1058 ret = false;
1059
1060 out_release:
1061 wiimote_cmd_release(wdata);
1062
1063 /* only poll for MP if requested and if state didn't change */
1064 if (ret && poll_mp && !(flags & WIIPROTO_FLAG_BUILTIN_MP) &&
1065 !(flags & WIIPROTO_FLAG_NO_MP))
1066 wiimote_init_poll_mp(wdata);
1067
1068 return ret;
1069 }
1070
1071 static const char *wiimote_exttype_names[WIIMOTE_EXT_NUM] = {
1072 [WIIMOTE_EXT_NONE] = "None",
1073 [WIIMOTE_EXT_UNKNOWN] = "Unknown",
1074 [WIIMOTE_EXT_NUNCHUK] = "Nintendo Wii Nunchuk",
1075 [WIIMOTE_EXT_CLASSIC_CONTROLLER] = "Nintendo Wii Classic Controller",
1076 [WIIMOTE_EXT_BALANCE_BOARD] = "Nintendo Wii Balance Board",
1077 [WIIMOTE_EXT_PRO_CONTROLLER] = "Nintendo Wii U Pro Controller",
1078 };
1079
1080 /*
1081 * Handle hotplug events
1082 * If we receive an hotplug event and the device-check failed, we deinitialize
1083 * the extension ports, re-read all extension IDs and set the device into
1084 * the desired state. This involves mapping MP into the main extension
1085 * registers, setting up extension passthrough modes and initializing the
1086 * requested extensions.
1087 */
1088 static void wiimote_init_hotplug(struct wiimote_data *wdata)
1089 {
1090 __u8 exttype, extdata[6], mpdata[6];
1091 __u32 flags;
1092 bool mp;
1093
1094 hid_dbg(wdata->hdev, "detect extensions..\n");
1095
1096 wiimote_cmd_acquire_noint(wdata);
1097
1098 spin_lock_irq(&wdata->state.lock);
1099
1100 /* get state snapshot that we will then work on */
1101 flags = wdata->state.flags;
1102
1103 /* disable event forwarding temporarily */
1104 wdata->state.flags &= ~WIIPROTO_FLAG_EXT_ACTIVE;
1105 wdata->state.flags &= ~WIIPROTO_FLAG_MP_ACTIVE;
1106
1107 spin_unlock_irq(&wdata->state.lock);
1108
1109 /* init extension and MP (deactivates current extension or MP) */
1110 wiimote_cmd_init_ext(wdata);
1111 if (flags & WIIPROTO_FLAG_NO_MP) {
1112 mp = false;
1113 } else {
1114 wiimote_cmd_init_mp(wdata);
1115 mp = wiimote_cmd_read_mp(wdata, mpdata);
1116 }
1117 exttype = wiimote_cmd_read_ext(wdata, extdata);
1118
1119 wiimote_cmd_release(wdata);
1120
1121 /* load/unload extension module if it changed */
1122 if (exttype != wdata->state.exttype) {
1123 /* unload previous extension */
1124 wiimote_ext_unload(wdata);
1125
1126 if (exttype == WIIMOTE_EXT_UNKNOWN) {
1127 hid_info(wdata->hdev, "cannot detect extension; %6phC\n",
1128 extdata);
1129 } else if (exttype == WIIMOTE_EXT_NONE) {
1130 spin_lock_irq(&wdata->state.lock);
1131 wdata->state.exttype = WIIMOTE_EXT_NONE;
1132 spin_unlock_irq(&wdata->state.lock);
1133 } else {
1134 hid_info(wdata->hdev, "detected extension: %s\n",
1135 wiimote_exttype_names[exttype]);
1136 /* try loading new extension */
1137 wiimote_ext_load(wdata, exttype);
1138 }
1139 }
1140
1141 /* load/unload MP module if it changed */
1142 if (mp) {
1143 if (!wdata->state.mp) {
1144 hid_info(wdata->hdev, "detected extension: Nintendo Wii Motion Plus\n");
1145 wiimote_mp_load(wdata);
1146 }
1147 } else if (wdata->state.mp) {
1148 wiimote_mp_unload(wdata);
1149 }
1150
1151 /* if MP is not used, do not map or activate it */
1152 if (!(flags & WIIPROTO_FLAG_MP_USED))
1153 mp = false;
1154
1155 /* map MP into main extension registers if used */
1156 if (mp) {
1157 wiimote_cmd_acquire_noint(wdata);
1158 wiimote_cmd_map_mp(wdata, exttype);
1159 wiimote_cmd_release(wdata);
1160
1161 /* delete MP hotplug timer */
1162 del_timer_sync(&wdata->timer);
1163 } else {
1164 /* reschedule MP hotplug timer */
1165 if (!(flags & WIIPROTO_FLAG_BUILTIN_MP) &&
1166 !(flags & WIIPROTO_FLAG_NO_MP))
1167 mod_timer(&wdata->timer, jiffies + HZ * 4);
1168 }
1169
1170 spin_lock_irq(&wdata->state.lock);
1171
1172 /* enable data forwarding again and set expected hotplug state */
1173 if (mp) {
1174 wdata->state.flags |= WIIPROTO_FLAG_MP_ACTIVE;
1175 if (wdata->state.exttype == WIIMOTE_EXT_NONE) {
1176 wdata->state.flags &= ~WIIPROTO_FLAG_EXT_PLUGGED;
1177 wdata->state.flags &= ~WIIPROTO_FLAG_MP_PLUGGED;
1178 } else {
1179 wdata->state.flags &= ~WIIPROTO_FLAG_EXT_PLUGGED;
1180 wdata->state.flags |= WIIPROTO_FLAG_MP_PLUGGED;
1181 wdata->state.flags |= WIIPROTO_FLAG_EXT_ACTIVE;
1182 }
1183 } else if (wdata->state.exttype != WIIMOTE_EXT_NONE) {
1184 wdata->state.flags |= WIIPROTO_FLAG_EXT_ACTIVE;
1185 }
1186
1187 /* request status report for hotplug state updates */
1188 wiiproto_req_status(wdata);
1189
1190 spin_unlock_irq(&wdata->state.lock);
1191
1192 hid_dbg(wdata->hdev, "detected extensions: MP: %d EXT: %d\n",
1193 wdata->state.mp, wdata->state.exttype);
1194 }
1195
1196 static void wiimote_init_worker(struct work_struct *work)
1197 {
1198 struct wiimote_data *wdata = container_of(work, struct wiimote_data,
1199 init_worker);
1200 bool changed = false;
1201
1202 if (wdata->state.devtype == WIIMOTE_DEV_PENDING) {
1203 wiimote_init_detect(wdata);
1204 changed = true;
1205 }
1206
1207 if (changed || !wiimote_init_check(wdata))
1208 wiimote_init_hotplug(wdata);
1209
1210 if (changed)
1211 kobject_uevent(&wdata->hdev->dev.kobj, KOBJ_CHANGE);
1212 }
1213
1214 void __wiimote_schedule(struct wiimote_data *wdata)
1215 {
1216 if (!(wdata->state.flags & WIIPROTO_FLAG_EXITING))
1217 schedule_work(&wdata->init_worker);
1218 }
1219
1220 static void wiimote_schedule(struct wiimote_data *wdata)
1221 {
1222 unsigned long flags;
1223
1224 spin_lock_irqsave(&wdata->state.lock, flags);
1225 __wiimote_schedule(wdata);
1226 spin_unlock_irqrestore(&wdata->state.lock, flags);
1227 }
1228
1229 static void wiimote_init_timeout(unsigned long arg)
1230 {
1231 struct wiimote_data *wdata = (void*)arg;
1232
1233 wiimote_schedule(wdata);
1234 }
1235
1236 /* protocol handlers */
1237
1238 static void handler_keys(struct wiimote_data *wdata, const __u8 *payload)
1239 {
1240 const __u8 *iter, *mods;
1241 const struct wiimod_ops *ops;
1242
1243 ops = wiimod_ext_table[wdata->state.exttype];
1244 if (ops->in_keys) {
1245 ops->in_keys(wdata, payload);
1246 return;
1247 }
1248
1249 mods = wiimote_devtype_mods[wdata->state.devtype];
1250 for (iter = mods; *iter != WIIMOD_NULL; ++iter) {
1251 ops = wiimod_table[*iter];
1252 if (ops->in_keys) {
1253 ops->in_keys(wdata, payload);
1254 break;
1255 }
1256 }
1257 }
1258
1259 static void handler_accel(struct wiimote_data *wdata, const __u8 *payload)
1260 {
1261 const __u8 *iter, *mods;
1262 const struct wiimod_ops *ops;
1263
1264 ops = wiimod_ext_table[wdata->state.exttype];
1265 if (ops->in_accel) {
1266 ops->in_accel(wdata, payload);
1267 return;
1268 }
1269
1270 mods = wiimote_devtype_mods[wdata->state.devtype];
1271 for (iter = mods; *iter != WIIMOD_NULL; ++iter) {
1272 ops = wiimod_table[*iter];
1273 if (ops->in_accel) {
1274 ops->in_accel(wdata, payload);
1275 break;
1276 }
1277 }
1278 }
1279
1280 static bool valid_ext_handler(const struct wiimod_ops *ops, size_t len)
1281 {
1282 if (!ops->in_ext)
1283 return false;
1284 if ((ops->flags & WIIMOD_FLAG_EXT8) && len < 8)
1285 return false;
1286 if ((ops->flags & WIIMOD_FLAG_EXT16) && len < 16)
1287 return false;
1288
1289 return true;
1290 }
1291
1292 static void handler_ext(struct wiimote_data *wdata, const __u8 *payload,
1293 size_t len)
1294 {
1295 static const __u8 invalid[21] = { 0xff, 0xff, 0xff, 0xff,
1296 0xff, 0xff, 0xff, 0xff,
1297 0xff, 0xff, 0xff, 0xff,
1298 0xff, 0xff, 0xff, 0xff,
1299 0xff, 0xff, 0xff, 0xff,
1300 0xff };
1301 const __u8 *iter, *mods;
1302 const struct wiimod_ops *ops;
1303 bool is_mp;
1304
1305 if (len > 21)
1306 len = 21;
1307 if (len < 6 || !memcmp(payload, invalid, len))
1308 return;
1309
1310 /* if MP is active, track MP slot hotplugging */
1311 if (wdata->state.flags & WIIPROTO_FLAG_MP_ACTIVE) {
1312 /* this bit is set for invalid events (eg. during hotplug) */
1313 if (payload[5] & 0x01)
1314 return;
1315
1316 if (payload[4] & 0x01) {
1317 if (!(wdata->state.flags & WIIPROTO_FLAG_MP_PLUGGED)) {
1318 hid_dbg(wdata->hdev, "MP hotplug: 1\n");
1319 wdata->state.flags |= WIIPROTO_FLAG_MP_PLUGGED;
1320 __wiimote_schedule(wdata);
1321 }
1322 } else {
1323 if (wdata->state.flags & WIIPROTO_FLAG_MP_PLUGGED) {
1324 hid_dbg(wdata->hdev, "MP hotplug: 0\n");
1325 wdata->state.flags &= ~WIIPROTO_FLAG_MP_PLUGGED;
1326 wdata->state.flags &= ~WIIPROTO_FLAG_EXT_ACTIVE;
1327 __wiimote_schedule(wdata);
1328 }
1329 }
1330
1331 /* detect MP data that is sent interleaved with EXT data */
1332 is_mp = payload[5] & 0x02;
1333 } else {
1334 is_mp = false;
1335 }
1336
1337 /* ignore EXT events if no extension is active */
1338 if (!(wdata->state.flags & WIIPROTO_FLAG_EXT_ACTIVE) && !is_mp)
1339 return;
1340
1341 /* try forwarding to extension handler, first */
1342 ops = wiimod_ext_table[wdata->state.exttype];
1343 if (is_mp && ops->in_mp) {
1344 ops->in_mp(wdata, payload);
1345 return;
1346 } else if (!is_mp && valid_ext_handler(ops, len)) {
1347 ops->in_ext(wdata, payload);
1348 return;
1349 }
1350
1351 /* try forwarding to MP handler */
1352 ops = &wiimod_mp;
1353 if (is_mp && ops->in_mp) {
1354 ops->in_mp(wdata, payload);
1355 return;
1356 } else if (!is_mp && valid_ext_handler(ops, len)) {
1357 ops->in_ext(wdata, payload);
1358 return;
1359 }
1360
1361 /* try forwarding to loaded modules */
1362 mods = wiimote_devtype_mods[wdata->state.devtype];
1363 for (iter = mods; *iter != WIIMOD_NULL; ++iter) {
1364 ops = wiimod_table[*iter];
1365 if (is_mp && ops->in_mp) {
1366 ops->in_mp(wdata, payload);
1367 return;
1368 } else if (!is_mp && valid_ext_handler(ops, len)) {
1369 ops->in_ext(wdata, payload);
1370 return;
1371 }
1372 }
1373 }
1374
1375 #define ir_to_input0(wdata, ir, packed) handler_ir((wdata), (ir), (packed), 0)
1376 #define ir_to_input1(wdata, ir, packed) handler_ir((wdata), (ir), (packed), 1)
1377 #define ir_to_input2(wdata, ir, packed) handler_ir((wdata), (ir), (packed), 2)
1378 #define ir_to_input3(wdata, ir, packed) handler_ir((wdata), (ir), (packed), 3)
1379
1380 static void handler_ir(struct wiimote_data *wdata, const __u8 *payload,
1381 bool packed, unsigned int id)
1382 {
1383 const __u8 *iter, *mods;
1384 const struct wiimod_ops *ops;
1385
1386 ops = wiimod_ext_table[wdata->state.exttype];
1387 if (ops->in_ir) {
1388 ops->in_ir(wdata, payload, packed, id);
1389 return;
1390 }
1391
1392 mods = wiimote_devtype_mods[wdata->state.devtype];
1393 for (iter = mods; *iter != WIIMOD_NULL; ++iter) {
1394 ops = wiimod_table[*iter];
1395 if (ops->in_ir) {
1396 ops->in_ir(wdata, payload, packed, id);
1397 break;
1398 }
1399 }
1400 }
1401
1402 /* reduced status report with "BB BB" key data only */
1403 static void handler_status_K(struct wiimote_data *wdata,
1404 const __u8 *payload)
1405 {
1406 handler_keys(wdata, payload);
1407
1408 /* on status reports the drm is reset so we need to resend the drm */
1409 wiiproto_req_drm(wdata, WIIPROTO_REQ_NULL);
1410 }
1411
1412 /* extended status report with "BB BB LF 00 00 VV" data */
1413 static void handler_status(struct wiimote_data *wdata, const __u8 *payload)
1414 {
1415 handler_status_K(wdata, payload);
1416
1417 /* update extension status */
1418 if (payload[2] & 0x02) {
1419 if (!(wdata->state.flags & WIIPROTO_FLAG_EXT_PLUGGED)) {
1420 hid_dbg(wdata->hdev, "EXT hotplug: 1\n");
1421 wdata->state.flags |= WIIPROTO_FLAG_EXT_PLUGGED;
1422 __wiimote_schedule(wdata);
1423 }
1424 } else {
1425 if (wdata->state.flags & WIIPROTO_FLAG_EXT_PLUGGED) {
1426 hid_dbg(wdata->hdev, "EXT hotplug: 0\n");
1427 wdata->state.flags &= ~WIIPROTO_FLAG_EXT_PLUGGED;
1428 wdata->state.flags &= ~WIIPROTO_FLAG_MP_PLUGGED;
1429 wdata->state.flags &= ~WIIPROTO_FLAG_EXT_ACTIVE;
1430 wdata->state.flags &= ~WIIPROTO_FLAG_MP_ACTIVE;
1431 __wiimote_schedule(wdata);
1432 }
1433 }
1434
1435 wdata->state.cmd_battery = payload[5];
1436 if (wiimote_cmd_pending(wdata, WIIPROTO_REQ_SREQ, 0))
1437 wiimote_cmd_complete(wdata);
1438 }
1439
1440 /* reduced generic report with "BB BB" key data only */
1441 static void handler_generic_K(struct wiimote_data *wdata, const __u8 *payload)
1442 {
1443 handler_keys(wdata, payload);
1444 }
1445
1446 static void handler_data(struct wiimote_data *wdata, const __u8 *payload)
1447 {
1448 __u16 offset = payload[3] << 8 | payload[4];
1449 __u8 size = (payload[2] >> 4) + 1;
1450 __u8 err = payload[2] & 0x0f;
1451
1452 handler_keys(wdata, payload);
1453
1454 if (wiimote_cmd_pending(wdata, WIIPROTO_REQ_RMEM, offset)) {
1455 if (err)
1456 size = 0;
1457 else if (size > wdata->state.cmd_read_size)
1458 size = wdata->state.cmd_read_size;
1459
1460 wdata->state.cmd_read_size = size;
1461 if (wdata->state.cmd_read_buf)
1462 memcpy(wdata->state.cmd_read_buf, &payload[5], size);
1463 wiimote_cmd_complete(wdata);
1464 }
1465 }
1466
1467 static void handler_return(struct wiimote_data *wdata, const __u8 *payload)
1468 {
1469 __u8 err = payload[3];
1470 __u8 cmd = payload[2];
1471
1472 handler_keys(wdata, payload);
1473
1474 if (wiimote_cmd_pending(wdata, cmd, 0)) {
1475 wdata->state.cmd_err = err;
1476 wiimote_cmd_complete(wdata);
1477 } else if (err) {
1478 hid_warn(wdata->hdev, "Remote error %hhu on req %hhu\n", err,
1479 cmd);
1480 }
1481 }
1482
1483 static void handler_drm_KA(struct wiimote_data *wdata, const __u8 *payload)
1484 {
1485 handler_keys(wdata, payload);
1486 handler_accel(wdata, payload);
1487 }
1488
1489 static void handler_drm_KE(struct wiimote_data *wdata, const __u8 *payload)
1490 {
1491 handler_keys(wdata, payload);
1492 handler_ext(wdata, &payload[2], 8);
1493 }
1494
1495 static void handler_drm_KAI(struct wiimote_data *wdata, const __u8 *payload)
1496 {
1497 handler_keys(wdata, payload);
1498 handler_accel(wdata, payload);
1499 ir_to_input0(wdata, &payload[5], false);
1500 ir_to_input1(wdata, &payload[8], false);
1501 ir_to_input2(wdata, &payload[11], false);
1502 ir_to_input3(wdata, &payload[14], false);
1503 }
1504
1505 static void handler_drm_KEE(struct wiimote_data *wdata, const __u8 *payload)
1506 {
1507 handler_keys(wdata, payload);
1508 handler_ext(wdata, &payload[2], 19);
1509 }
1510
1511 static void handler_drm_KIE(struct wiimote_data *wdata, const __u8 *payload)
1512 {
1513 handler_keys(wdata, payload);
1514 ir_to_input0(wdata, &payload[2], false);
1515 ir_to_input1(wdata, &payload[4], true);
1516 ir_to_input2(wdata, &payload[7], false);
1517 ir_to_input3(wdata, &payload[9], true);
1518 handler_ext(wdata, &payload[12], 9);
1519 }
1520
1521 static void handler_drm_KAE(struct wiimote_data *wdata, const __u8 *payload)
1522 {
1523 handler_keys(wdata, payload);
1524 handler_accel(wdata, payload);
1525 handler_ext(wdata, &payload[5], 16);
1526 }
1527
1528 static void handler_drm_KAIE(struct wiimote_data *wdata, const __u8 *payload)
1529 {
1530 handler_keys(wdata, payload);
1531 handler_accel(wdata, payload);
1532 ir_to_input0(wdata, &payload[5], false);
1533 ir_to_input1(wdata, &payload[7], true);
1534 ir_to_input2(wdata, &payload[10], false);
1535 ir_to_input3(wdata, &payload[12], true);
1536 handler_ext(wdata, &payload[15], 6);
1537 }
1538
1539 static void handler_drm_E(struct wiimote_data *wdata, const __u8 *payload)
1540 {
1541 handler_ext(wdata, payload, 21);
1542 }
1543
1544 static void handler_drm_SKAI1(struct wiimote_data *wdata, const __u8 *payload)
1545 {
1546 handler_keys(wdata, payload);
1547
1548 wdata->state.accel_split[0] = payload[2];
1549 wdata->state.accel_split[1] = (payload[0] >> 1) & (0x10 | 0x20);
1550 wdata->state.accel_split[1] |= (payload[1] << 1) & (0x40 | 0x80);
1551
1552 ir_to_input0(wdata, &payload[3], false);
1553 ir_to_input1(wdata, &payload[12], false);
1554 }
1555
1556 static void handler_drm_SKAI2(struct wiimote_data *wdata, const __u8 *payload)
1557 {
1558 __u8 buf[5];
1559
1560 handler_keys(wdata, payload);
1561
1562 wdata->state.accel_split[1] |= (payload[0] >> 5) & (0x01 | 0x02);
1563 wdata->state.accel_split[1] |= (payload[1] >> 3) & (0x04 | 0x08);
1564
1565 buf[0] = 0;
1566 buf[1] = 0;
1567 buf[2] = wdata->state.accel_split[0];
1568 buf[3] = payload[2];
1569 buf[4] = wdata->state.accel_split[1];
1570 handler_accel(wdata, buf);
1571
1572 ir_to_input2(wdata, &payload[3], false);
1573 ir_to_input3(wdata, &payload[12], false);
1574 }
1575
1576 struct wiiproto_handler {
1577 __u8 id;
1578 size_t size;
1579 void (*func)(struct wiimote_data *wdata, const __u8 *payload);
1580 };
1581
1582 static struct wiiproto_handler handlers[] = {
1583 { .id = WIIPROTO_REQ_STATUS, .size = 6, .func = handler_status },
1584 { .id = WIIPROTO_REQ_STATUS, .size = 2, .func = handler_status_K },
1585 { .id = WIIPROTO_REQ_DATA, .size = 21, .func = handler_data },
1586 { .id = WIIPROTO_REQ_DATA, .size = 2, .func = handler_generic_K },
1587 { .id = WIIPROTO_REQ_RETURN, .size = 4, .func = handler_return },
1588 { .id = WIIPROTO_REQ_RETURN, .size = 2, .func = handler_generic_K },
1589 { .id = WIIPROTO_REQ_DRM_K, .size = 2, .func = handler_keys },
1590 { .id = WIIPROTO_REQ_DRM_KA, .size = 5, .func = handler_drm_KA },
1591 { .id = WIIPROTO_REQ_DRM_KA, .size = 2, .func = handler_generic_K },
1592 { .id = WIIPROTO_REQ_DRM_KE, .size = 10, .func = handler_drm_KE },
1593 { .id = WIIPROTO_REQ_DRM_KE, .size = 2, .func = handler_generic_K },
1594 { .id = WIIPROTO_REQ_DRM_KAI, .size = 17, .func = handler_drm_KAI },
1595 { .id = WIIPROTO_REQ_DRM_KAI, .size = 2, .func = handler_generic_K },
1596 { .id = WIIPROTO_REQ_DRM_KEE, .size = 21, .func = handler_drm_KEE },
1597 { .id = WIIPROTO_REQ_DRM_KEE, .size = 2, .func = handler_generic_K },
1598 { .id = WIIPROTO_REQ_DRM_KAE, .size = 21, .func = handler_drm_KAE },
1599 { .id = WIIPROTO_REQ_DRM_KAE, .size = 2, .func = handler_generic_K },
1600 { .id = WIIPROTO_REQ_DRM_KIE, .size = 21, .func = handler_drm_KIE },
1601 { .id = WIIPROTO_REQ_DRM_KIE, .size = 2, .func = handler_generic_K },
1602 { .id = WIIPROTO_REQ_DRM_KAIE, .size = 21, .func = handler_drm_KAIE },
1603 { .id = WIIPROTO_REQ_DRM_KAIE, .size = 2, .func = handler_generic_K },
1604 { .id = WIIPROTO_REQ_DRM_E, .size = 21, .func = handler_drm_E },
1605 { .id = WIIPROTO_REQ_DRM_SKAI1, .size = 21, .func = handler_drm_SKAI1 },
1606 { .id = WIIPROTO_REQ_DRM_SKAI2, .size = 21, .func = handler_drm_SKAI2 },
1607 { .id = 0 }
1608 };
1609
1610 static int wiimote_hid_event(struct hid_device *hdev, struct hid_report *report,
1611 u8 *raw_data, int size)
1612 {
1613 struct wiimote_data *wdata = hid_get_drvdata(hdev);
1614 struct wiiproto_handler *h;
1615 int i;
1616 unsigned long flags;
1617
1618 if (size < 1)
1619 return -EINVAL;
1620
1621 spin_lock_irqsave(&wdata->state.lock, flags);
1622
1623 for (i = 0; handlers[i].id; ++i) {
1624 h = &handlers[i];
1625 if (h->id == raw_data[0] && h->size < size) {
1626 h->func(wdata, &raw_data[1]);
1627 break;
1628 }
1629 }
1630
1631 if (!handlers[i].id)
1632 hid_warn(hdev, "Unhandled report %hhu size %d\n", raw_data[0],
1633 size);
1634
1635 spin_unlock_irqrestore(&wdata->state.lock, flags);
1636
1637 return 0;
1638 }
1639
1640 static ssize_t wiimote_ext_show(struct device *dev,
1641 struct device_attribute *attr,
1642 char *buf)
1643 {
1644 struct wiimote_data *wdata = dev_to_wii(dev);
1645 __u8 type;
1646 unsigned long flags;
1647
1648 spin_lock_irqsave(&wdata->state.lock, flags);
1649 type = wdata->state.exttype;
1650 spin_unlock_irqrestore(&wdata->state.lock, flags);
1651
1652 switch (type) {
1653 case WIIMOTE_EXT_NONE:
1654 return sprintf(buf, "none\n");
1655 case WIIMOTE_EXT_NUNCHUK:
1656 return sprintf(buf, "nunchuk\n");
1657 case WIIMOTE_EXT_CLASSIC_CONTROLLER:
1658 return sprintf(buf, "classic\n");
1659 case WIIMOTE_EXT_BALANCE_BOARD:
1660 return sprintf(buf, "balanceboard\n");
1661 case WIIMOTE_EXT_PRO_CONTROLLER:
1662 return sprintf(buf, "procontroller\n");
1663 case WIIMOTE_EXT_UNKNOWN:
1664 /* fallthrough */
1665 default:
1666 return sprintf(buf, "unknown\n");
1667 }
1668 }
1669
1670 static ssize_t wiimote_ext_store(struct device *dev,
1671 struct device_attribute *attr,
1672 const char *buf, size_t count)
1673 {
1674 struct wiimote_data *wdata = dev_to_wii(dev);
1675
1676 if (!strcmp(buf, "scan")) {
1677 wiimote_schedule(wdata);
1678 } else {
1679 return -EINVAL;
1680 }
1681
1682 return strnlen(buf, PAGE_SIZE);
1683 }
1684
1685 static DEVICE_ATTR(extension, S_IRUGO | S_IWUSR | S_IWGRP, wiimote_ext_show,
1686 wiimote_ext_store);
1687
1688 static ssize_t wiimote_dev_show(struct device *dev,
1689 struct device_attribute *attr,
1690 char *buf)
1691 {
1692 struct wiimote_data *wdata = dev_to_wii(dev);
1693 __u8 type;
1694 unsigned long flags;
1695
1696 spin_lock_irqsave(&wdata->state.lock, flags);
1697 type = wdata->state.devtype;
1698 spin_unlock_irqrestore(&wdata->state.lock, flags);
1699
1700 switch (type) {
1701 case WIIMOTE_DEV_GENERIC:
1702 return sprintf(buf, "generic\n");
1703 case WIIMOTE_DEV_GEN10:
1704 return sprintf(buf, "gen10\n");
1705 case WIIMOTE_DEV_GEN20:
1706 return sprintf(buf, "gen20\n");
1707 case WIIMOTE_DEV_BALANCE_BOARD:
1708 return sprintf(buf, "balanceboard\n");
1709 case WIIMOTE_DEV_PRO_CONTROLLER:
1710 return sprintf(buf, "procontroller\n");
1711 case WIIMOTE_DEV_PENDING:
1712 return sprintf(buf, "pending\n");
1713 case WIIMOTE_DEV_UNKNOWN:
1714 /* fallthrough */
1715 default:
1716 return sprintf(buf, "unknown\n");
1717 }
1718 }
1719
1720 static DEVICE_ATTR(devtype, S_IRUGO, wiimote_dev_show, NULL);
1721
1722 static struct wiimote_data *wiimote_create(struct hid_device *hdev)
1723 {
1724 struct wiimote_data *wdata;
1725
1726 wdata = kzalloc(sizeof(*wdata), GFP_KERNEL);
1727 if (!wdata)
1728 return NULL;
1729
1730 wdata->hdev = hdev;
1731 hid_set_drvdata(hdev, wdata);
1732
1733 spin_lock_init(&wdata->queue.lock);
1734 INIT_WORK(&wdata->queue.worker, wiimote_queue_worker);
1735
1736 spin_lock_init(&wdata->state.lock);
1737 init_completion(&wdata->state.ready);
1738 mutex_init(&wdata->state.sync);
1739 wdata->state.drm = WIIPROTO_REQ_DRM_K;
1740 wdata->state.cmd_battery = 0xff;
1741
1742 INIT_WORK(&wdata->init_worker, wiimote_init_worker);
1743 setup_timer(&wdata->timer, wiimote_init_timeout, (long)wdata);
1744
1745 return wdata;
1746 }
1747
1748 static void wiimote_destroy(struct wiimote_data *wdata)
1749 {
1750 unsigned long flags;
1751
1752 wiidebug_deinit(wdata);
1753
1754 /* prevent init_worker from being scheduled again */
1755 spin_lock_irqsave(&wdata->state.lock, flags);
1756 wdata->state.flags |= WIIPROTO_FLAG_EXITING;
1757 spin_unlock_irqrestore(&wdata->state.lock, flags);
1758
1759 cancel_work_sync(&wdata->init_worker);
1760 del_timer_sync(&wdata->timer);
1761
1762 device_remove_file(&wdata->hdev->dev, &dev_attr_devtype);
1763 device_remove_file(&wdata->hdev->dev, &dev_attr_extension);
1764
1765 wiimote_mp_unload(wdata);
1766 wiimote_ext_unload(wdata);
1767 wiimote_modules_unload(wdata);
1768 cancel_work_sync(&wdata->queue.worker);
1769 hid_hw_close(wdata->hdev);
1770 hid_hw_stop(wdata->hdev);
1771
1772 kfree(wdata);
1773 }
1774
1775 static int wiimote_hid_probe(struct hid_device *hdev,
1776 const struct hid_device_id *id)
1777 {
1778 struct wiimote_data *wdata;
1779 int ret;
1780
1781 hdev->quirks |= HID_QUIRK_NO_INIT_REPORTS;
1782
1783 wdata = wiimote_create(hdev);
1784 if (!wdata) {
1785 hid_err(hdev, "Can't alloc device\n");
1786 return -ENOMEM;
1787 }
1788
1789 ret = hid_parse(hdev);
1790 if (ret) {
1791 hid_err(hdev, "HID parse failed\n");
1792 goto err;
1793 }
1794
1795 ret = hid_hw_start(hdev, HID_CONNECT_HIDRAW);
1796 if (ret) {
1797 hid_err(hdev, "HW start failed\n");
1798 goto err;
1799 }
1800
1801 ret = hid_hw_open(hdev);
1802 if (ret) {
1803 hid_err(hdev, "cannot start hardware I/O\n");
1804 goto err_stop;
1805 }
1806
1807 ret = device_create_file(&hdev->dev, &dev_attr_extension);
1808 if (ret) {
1809 hid_err(hdev, "cannot create sysfs attribute\n");
1810 goto err_close;
1811 }
1812
1813 ret = device_create_file(&hdev->dev, &dev_attr_devtype);
1814 if (ret) {
1815 hid_err(hdev, "cannot create sysfs attribute\n");
1816 goto err_ext;
1817 }
1818
1819 ret = wiidebug_init(wdata);
1820 if (ret)
1821 goto err_free;
1822
1823 hid_info(hdev, "New device registered\n");
1824
1825 /* schedule device detection */
1826 wiimote_schedule(wdata);
1827
1828 return 0;
1829
1830 err_free:
1831 wiimote_destroy(wdata);
1832 return ret;
1833
1834 err_ext:
1835 device_remove_file(&wdata->hdev->dev, &dev_attr_extension);
1836 err_close:
1837 hid_hw_close(hdev);
1838 err_stop:
1839 hid_hw_stop(hdev);
1840 err:
1841 input_free_device(wdata->ir);
1842 input_free_device(wdata->accel);
1843 kfree(wdata);
1844 return ret;
1845 }
1846
1847 static void wiimote_hid_remove(struct hid_device *hdev)
1848 {
1849 struct wiimote_data *wdata = hid_get_drvdata(hdev);
1850
1851 hid_info(hdev, "Device removed\n");
1852 wiimote_destroy(wdata);
1853 }
1854
1855 static const struct hid_device_id wiimote_hid_devices[] = {
1856 { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_NINTENDO,
1857 USB_DEVICE_ID_NINTENDO_WIIMOTE) },
1858 { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_NINTENDO,
1859 USB_DEVICE_ID_NINTENDO_WIIMOTE2) },
1860 { }
1861 };
1862 MODULE_DEVICE_TABLE(hid, wiimote_hid_devices);
1863
1864 static struct hid_driver wiimote_hid_driver = {
1865 .name = "wiimote",
1866 .id_table = wiimote_hid_devices,
1867 .probe = wiimote_hid_probe,
1868 .remove = wiimote_hid_remove,
1869 .raw_event = wiimote_hid_event,
1870 };
1871 module_hid_driver(wiimote_hid_driver);
1872
1873 MODULE_LICENSE("GPL");
1874 MODULE_AUTHOR("David Herrmann <dh.herrmann@gmail.com>");
1875 MODULE_DESCRIPTION("Driver for Nintendo Wii / Wii U peripherals");
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