Version:  2.0.40 2.2.26 2.4.37 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 3.10 3.11 3.12 3.13 3.14 3.15 3.16 3.17 3.18

Linux/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");
1876 

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