1 /*
2  * HID driver for Nintendo Wiimote devices
3  * Copyright (c) 2011 David Herrmann
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/leds.h>
18 #include <linux/module.h>
19 #include <linux/mutex.h>
20 #include <linux/power_supply.h>
21 #include <linux/spinlock.h>
22 #include "hid-ids.h"
23 #include "hid-wiimote.h"
24 
25 enum wiiproto_keys {
26 	WIIPROTO_KEY_LEFT,
27 	WIIPROTO_KEY_RIGHT,
28 	WIIPROTO_KEY_UP,
29 	WIIPROTO_KEY_DOWN,
30 	WIIPROTO_KEY_PLUS,
31 	WIIPROTO_KEY_MINUS,
32 	WIIPROTO_KEY_ONE,
33 	WIIPROTO_KEY_TWO,
34 	WIIPROTO_KEY_A,
35 	WIIPROTO_KEY_B,
36 	WIIPROTO_KEY_HOME,
37 	WIIPROTO_KEY_COUNT
38 };
39 
40 static __u16 wiiproto_keymap[] = {
41 	KEY_LEFT,	/* WIIPROTO_KEY_LEFT */
42 	KEY_RIGHT,	/* WIIPROTO_KEY_RIGHT */
43 	KEY_UP,		/* WIIPROTO_KEY_UP */
44 	KEY_DOWN,	/* WIIPROTO_KEY_DOWN */
45 	KEY_NEXT,	/* WIIPROTO_KEY_PLUS */
46 	KEY_PREVIOUS,	/* WIIPROTO_KEY_MINUS */
47 	BTN_1,		/* WIIPROTO_KEY_ONE */
48 	BTN_2,		/* WIIPROTO_KEY_TWO */
49 	BTN_A,		/* WIIPROTO_KEY_A */
50 	BTN_B,		/* WIIPROTO_KEY_B */
51 	BTN_MODE,	/* WIIPROTO_KEY_HOME */
52 };
53 
54 static enum power_supply_property wiimote_battery_props[] = {
55 	POWER_SUPPLY_PROP_CAPACITY,
56 	POWER_SUPPLY_PROP_SCOPE,
57 };
58 
59 static ssize_t wiimote_hid_send(struct hid_device *hdev, __u8 *buffer,
60 								size_t count)
61 {
62 	__u8 *buf;
63 	ssize_t ret;
64 
65 	if (!hdev->hid_output_raw_report)
66 		return -ENODEV;
67 
68 	buf = kmemdup(buffer, count, GFP_KERNEL);
69 	if (!buf)
70 		return -ENOMEM;
71 
72 	ret = hdev->hid_output_raw_report(hdev, buf, count, HID_OUTPUT_REPORT);
73 
74 	kfree(buf);
75 	return ret;
76 }
77 
78 static void wiimote_worker(struct work_struct *work)
79 {
80 	struct wiimote_data *wdata = container_of(work, struct wiimote_data,
81 									worker);
82 	unsigned long flags;
83 
84 	spin_lock_irqsave(&wdata->qlock, flags);
85 
86 	while (wdata->head != wdata->tail) {
87 		spin_unlock_irqrestore(&wdata->qlock, flags);
88 		wiimote_hid_send(wdata->hdev, wdata->outq[wdata->tail].data,
89 						wdata->outq[wdata->tail].size);
90 		spin_lock_irqsave(&wdata->qlock, flags);
91 
92 		wdata->tail = (wdata->tail + 1) % WIIMOTE_BUFSIZE;
93 	}
94 
95 	spin_unlock_irqrestore(&wdata->qlock, flags);
96 }
97 
98 static void wiimote_queue(struct wiimote_data *wdata, const __u8 *buffer,
99 								size_t count)
100 {
101 	unsigned long flags;
102 	__u8 newhead;
103 
104 	if (count > HID_MAX_BUFFER_SIZE) {
105 		hid_warn(wdata->hdev, "Sending too large output report\n");
106 		return;
107 	}
108 
109 	/*
110 	 * Copy new request into our output queue and check whether the
111 	 * queue is full. If it is full, discard this request.
112 	 * If it is empty we need to start a new worker that will
113 	 * send out the buffer to the hid device.
114 	 * If the queue is not empty, then there must be a worker
115 	 * that is currently sending out our buffer and this worker
116 	 * will reschedule itself until the queue is empty.
117 	 */
118 
119 	spin_lock_irqsave(&wdata->qlock, flags);
120 
121 	memcpy(wdata->outq[wdata->head].data, buffer, count);
122 	wdata->outq[wdata->head].size = count;
123 	newhead = (wdata->head + 1) % WIIMOTE_BUFSIZE;
124 
125 	if (wdata->head == wdata->tail) {
126 		wdata->head = newhead;
127 		schedule_work(&wdata->worker);
128 	} else if (newhead != wdata->tail) {
129 		wdata->head = newhead;
130 	} else {
131 		hid_warn(wdata->hdev, "Output queue is full");
132 	}
133 
134 	spin_unlock_irqrestore(&wdata->qlock, flags);
135 }
136 
137 /*
138  * This sets the rumble bit on the given output report if rumble is
139  * currently enabled.
140  * \cmd1 must point to the second byte in the output report => &cmd[1]
141  * This must be called on nearly every output report before passing it
142  * into the output queue!
143  */
144 static inline void wiiproto_keep_rumble(struct wiimote_data *wdata, __u8 *cmd1)
145 {
146 	if (wdata->state.flags & WIIPROTO_FLAG_RUMBLE)
147 		*cmd1 |= 0x01;
148 }
149 
150 static void wiiproto_req_rumble(struct wiimote_data *wdata, __u8 rumble)
151 {
152 	__u8 cmd[2];
153 
154 	rumble = !!rumble;
155 	if (rumble == !!(wdata->state.flags & WIIPROTO_FLAG_RUMBLE))
156 		return;
157 
158 	if (rumble)
159 		wdata->state.flags |= WIIPROTO_FLAG_RUMBLE;
160 	else
161 		wdata->state.flags &= ~WIIPROTO_FLAG_RUMBLE;
162 
163 	cmd[0] = WIIPROTO_REQ_RUMBLE;
164 	cmd[1] = 0;
165 
166 	wiiproto_keep_rumble(wdata, &cmd[1]);
167 	wiimote_queue(wdata, cmd, sizeof(cmd));
168 }
169 
170 static void wiiproto_req_leds(struct wiimote_data *wdata, int leds)
171 {
172 	__u8 cmd[2];
173 
174 	leds &= WIIPROTO_FLAGS_LEDS;
175 	if ((wdata->state.flags & WIIPROTO_FLAGS_LEDS) == leds)
176 		return;
177 	wdata->state.flags = (wdata->state.flags & ~WIIPROTO_FLAGS_LEDS) | leds;
178 
179 	cmd[0] = WIIPROTO_REQ_LED;
180 	cmd[1] = 0;
181 
182 	if (leds & WIIPROTO_FLAG_LED1)
183 		cmd[1] |= 0x10;
184 	if (leds & WIIPROTO_FLAG_LED2)
185 		cmd[1] |= 0x20;
186 	if (leds & WIIPROTO_FLAG_LED3)
187 		cmd[1] |= 0x40;
188 	if (leds & WIIPROTO_FLAG_LED4)
189 		cmd[1] |= 0x80;
190 
191 	wiiproto_keep_rumble(wdata, &cmd[1]);
192 	wiimote_queue(wdata, cmd, sizeof(cmd));
193 }
194 
195 /*
196  * Check what peripherals of the wiimote are currently
197  * active and select a proper DRM that supports all of
198  * the requested data inputs.
199  */
200 static __u8 select_drm(struct wiimote_data *wdata)
201 {
202 	__u8 ir = wdata->state.flags & WIIPROTO_FLAGS_IR;
203 	bool ext = wiiext_active(wdata);
204 
205 	if (ir == WIIPROTO_FLAG_IR_BASIC) {
206 		if (wdata->state.flags & WIIPROTO_FLAG_ACCEL)
207 			return WIIPROTO_REQ_DRM_KAIE;
208 		else
209 			return WIIPROTO_REQ_DRM_KIE;
210 	} else if (ir == WIIPROTO_FLAG_IR_EXT) {
211 		return WIIPROTO_REQ_DRM_KAI;
212 	} else if (ir == WIIPROTO_FLAG_IR_FULL) {
213 		return WIIPROTO_REQ_DRM_SKAI1;
214 	} else {
215 		if (wdata->state.flags & WIIPROTO_FLAG_ACCEL) {
216 			if (ext)
217 				return WIIPROTO_REQ_DRM_KAE;
218 			else
219 				return WIIPROTO_REQ_DRM_KA;
220 		} else {
221 			if (ext)
222 				return WIIPROTO_REQ_DRM_KE;
223 			else
224 				return WIIPROTO_REQ_DRM_K;
225 		}
226 	}
227 }
228 
229 void wiiproto_req_drm(struct wiimote_data *wdata, __u8 drm)
230 {
231 	__u8 cmd[3];
232 
233 	if (drm == WIIPROTO_REQ_NULL)
234 		drm = select_drm(wdata);
235 
236 	cmd[0] = WIIPROTO_REQ_DRM;
237 	cmd[1] = 0;
238 	cmd[2] = drm;
239 
240 	wdata->state.drm = drm;
241 	wiiproto_keep_rumble(wdata, &cmd[1]);
242 	wiimote_queue(wdata, cmd, sizeof(cmd));
243 }
244 
245 static void wiiproto_req_status(struct wiimote_data *wdata)
246 {
247 	__u8 cmd[2];
248 
249 	cmd[0] = WIIPROTO_REQ_SREQ;
250 	cmd[1] = 0;
251 
252 	wiiproto_keep_rumble(wdata, &cmd[1]);
253 	wiimote_queue(wdata, cmd, sizeof(cmd));
254 }
255 
256 static void wiiproto_req_accel(struct wiimote_data *wdata, __u8 accel)
257 {
258 	accel = !!accel;
259 	if (accel == !!(wdata->state.flags & WIIPROTO_FLAG_ACCEL))
260 		return;
261 
262 	if (accel)
263 		wdata->state.flags |= WIIPROTO_FLAG_ACCEL;
264 	else
265 		wdata->state.flags &= ~WIIPROTO_FLAG_ACCEL;
266 
267 	wiiproto_req_drm(wdata, WIIPROTO_REQ_NULL);
268 }
269 
270 static void wiiproto_req_ir1(struct wiimote_data *wdata, __u8 flags)
271 {
272 	__u8 cmd[2];
273 
274 	cmd[0] = WIIPROTO_REQ_IR1;
275 	cmd[1] = flags;
276 
277 	wiiproto_keep_rumble(wdata, &cmd[1]);
278 	wiimote_queue(wdata, cmd, sizeof(cmd));
279 }
280 
281 static void wiiproto_req_ir2(struct wiimote_data *wdata, __u8 flags)
282 {
283 	__u8 cmd[2];
284 
285 	cmd[0] = WIIPROTO_REQ_IR2;
286 	cmd[1] = flags;
287 
288 	wiiproto_keep_rumble(wdata, &cmd[1]);
289 	wiimote_queue(wdata, cmd, sizeof(cmd));
290 }
291 
292 #define wiiproto_req_wreg(wdata, os, buf, sz) \
293 			wiiproto_req_wmem((wdata), false, (os), (buf), (sz))
294 
295 #define wiiproto_req_weeprom(wdata, os, buf, sz) \
296 			wiiproto_req_wmem((wdata), true, (os), (buf), (sz))
297 
298 static void wiiproto_req_wmem(struct wiimote_data *wdata, bool eeprom,
299 				__u32 offset, const __u8 *buf, __u8 size)
300 {
301 	__u8 cmd[22];
302 
303 	if (size > 16 || size == 0) {
304 		hid_warn(wdata->hdev, "Invalid length %d wmem request\n", size);
305 		return;
306 	}
307 
308 	memset(cmd, 0, sizeof(cmd));
309 	cmd[0] = WIIPROTO_REQ_WMEM;
310 	cmd[2] = (offset >> 16) & 0xff;
311 	cmd[3] = (offset >> 8) & 0xff;
312 	cmd[4] = offset & 0xff;
313 	cmd[5] = size;
314 	memcpy(&cmd[6], buf, size);
315 
316 	if (!eeprom)
317 		cmd[1] |= 0x04;
318 
319 	wiiproto_keep_rumble(wdata, &cmd[1]);
320 	wiimote_queue(wdata, cmd, sizeof(cmd));
321 }
322 
323 void wiiproto_req_rmem(struct wiimote_data *wdata, bool eeprom, __u32 offset,
324 								__u16 size)
325 {
326 	__u8 cmd[7];
327 
328 	if (size == 0) {
329 		hid_warn(wdata->hdev, "Invalid length %d rmem request\n", size);
330 		return;
331 	}
332 
333 	cmd[0] = WIIPROTO_REQ_RMEM;
334 	cmd[1] = 0;
335 	cmd[2] = (offset >> 16) & 0xff;
336 	cmd[3] = (offset >> 8) & 0xff;
337 	cmd[4] = offset & 0xff;
338 	cmd[5] = (size >> 8) & 0xff;
339 	cmd[6] = size & 0xff;
340 
341 	if (!eeprom)
342 		cmd[1] |= 0x04;
343 
344 	wiiproto_keep_rumble(wdata, &cmd[1]);
345 	wiimote_queue(wdata, cmd, sizeof(cmd));
346 }
347 
348 /* requries the cmd-mutex to be held */
349 int wiimote_cmd_write(struct wiimote_data *wdata, __u32 offset,
350 						const __u8 *wmem, __u8 size)
351 {
352 	unsigned long flags;
353 	int ret;
354 
355 	spin_lock_irqsave(&wdata->state.lock, flags);
356 	wiimote_cmd_set(wdata, WIIPROTO_REQ_WMEM, 0);
357 	wiiproto_req_wreg(wdata, offset, wmem, size);
358 	spin_unlock_irqrestore(&wdata->state.lock, flags);
359 
360 	ret = wiimote_cmd_wait(wdata);
361 	if (!ret && wdata->state.cmd_err)
362 		ret = -EIO;
363 
364 	return ret;
365 }
366 
367 /* requries the cmd-mutex to be held */
368 ssize_t wiimote_cmd_read(struct wiimote_data *wdata, __u32 offset, __u8 *rmem,
369 								__u8 size)
370 {
371 	unsigned long flags;
372 	ssize_t ret;
373 
374 	spin_lock_irqsave(&wdata->state.lock, flags);
375 	wdata->state.cmd_read_size = size;
376 	wdata->state.cmd_read_buf = rmem;
377 	wiimote_cmd_set(wdata, WIIPROTO_REQ_RMEM, offset & 0xffff);
378 	wiiproto_req_rreg(wdata, offset, size);
379 	spin_unlock_irqrestore(&wdata->state.lock, flags);
380 
381 	ret = wiimote_cmd_wait(wdata);
382 
383 	spin_lock_irqsave(&wdata->state.lock, flags);
384 	wdata->state.cmd_read_buf = NULL;
385 	spin_unlock_irqrestore(&wdata->state.lock, flags);
386 
387 	if (!ret) {
388 		if (wdata->state.cmd_read_size == 0)
389 			ret = -EIO;
390 		else
391 			ret = wdata->state.cmd_read_size;
392 	}
393 
394 	return ret;
395 }
396 
397 static int wiimote_battery_get_property(struct power_supply *psy,
398 						enum power_supply_property psp,
399 						union power_supply_propval *val)
400 {
401 	struct wiimote_data *wdata = container_of(psy,
402 						struct wiimote_data, battery);
403 	int ret = 0, state;
404 	unsigned long flags;
405 
406 	if (psp == POWER_SUPPLY_PROP_SCOPE) {
407 		val->intval = POWER_SUPPLY_SCOPE_DEVICE;
408 		return 0;
409 	}
410 
411 	ret = wiimote_cmd_acquire(wdata);
412 	if (ret)
413 		return ret;
414 
415 	spin_lock_irqsave(&wdata->state.lock, flags);
416 	wiimote_cmd_set(wdata, WIIPROTO_REQ_SREQ, 0);
417 	wiiproto_req_status(wdata);
418 	spin_unlock_irqrestore(&wdata->state.lock, flags);
419 
420 	ret = wiimote_cmd_wait(wdata);
421 	state = wdata->state.cmd_battery;
422 	wiimote_cmd_release(wdata);
423 
424 	if (ret)
425 		return ret;
426 
427 	switch (psp) {
428 		case POWER_SUPPLY_PROP_CAPACITY:
429 			val->intval = state * 100 / 255;
430 			break;
431 		default:
432 			ret = -EINVAL;
433 			break;
434 	}
435 
436 	return ret;
437 }
438 
439 static int wiimote_init_ir(struct wiimote_data *wdata, __u16 mode)
440 {
441 	int ret;
442 	unsigned long flags;
443 	__u8 format = 0;
444 	static const __u8 data_enable[] = { 0x01 };
445 	static const __u8 data_sens1[] = { 0x02, 0x00, 0x00, 0x71, 0x01,
446 						0x00, 0xaa, 0x00, 0x64 };
447 	static const __u8 data_sens2[] = { 0x63, 0x03 };
448 	static const __u8 data_fin[] = { 0x08 };
449 
450 	spin_lock_irqsave(&wdata->state.lock, flags);
451 
452 	if (mode == (wdata->state.flags & WIIPROTO_FLAGS_IR)) {
453 		spin_unlock_irqrestore(&wdata->state.lock, flags);
454 		return 0;
455 	}
456 
457 	if (mode == 0) {
458 		wdata->state.flags &= ~WIIPROTO_FLAGS_IR;
459 		wiiproto_req_ir1(wdata, 0);
460 		wiiproto_req_ir2(wdata, 0);
461 		wiiproto_req_drm(wdata, WIIPROTO_REQ_NULL);
462 		spin_unlock_irqrestore(&wdata->state.lock, flags);
463 		return 0;
464 	}
465 
466 	spin_unlock_irqrestore(&wdata->state.lock, flags);
467 
468 	ret = wiimote_cmd_acquire(wdata);
469 	if (ret)
470 		return ret;
471 
472 	/* send PIXEL CLOCK ENABLE cmd first */
473 	spin_lock_irqsave(&wdata->state.lock, flags);
474 	wiimote_cmd_set(wdata, WIIPROTO_REQ_IR1, 0);
475 	wiiproto_req_ir1(wdata, 0x06);
476 	spin_unlock_irqrestore(&wdata->state.lock, flags);
477 
478 	ret = wiimote_cmd_wait(wdata);
479 	if (ret)
480 		goto unlock;
481 	if (wdata->state.cmd_err) {
482 		ret = -EIO;
483 		goto unlock;
484 	}
485 
486 	/* enable IR LOGIC */
487 	spin_lock_irqsave(&wdata->state.lock, flags);
488 	wiimote_cmd_set(wdata, WIIPROTO_REQ_IR2, 0);
489 	wiiproto_req_ir2(wdata, 0x06);
490 	spin_unlock_irqrestore(&wdata->state.lock, flags);
491 
492 	ret = wiimote_cmd_wait(wdata);
493 	if (ret)
494 		goto unlock;
495 	if (wdata->state.cmd_err) {
496 		ret = -EIO;
497 		goto unlock;
498 	}
499 
500 	/* enable IR cam but do not make it send data, yet */
501 	ret = wiimote_cmd_write(wdata, 0xb00030, data_enable,
502 							sizeof(data_enable));
503 	if (ret)
504 		goto unlock;
505 
506 	/* write first sensitivity block */
507 	ret = wiimote_cmd_write(wdata, 0xb00000, data_sens1,
508 							sizeof(data_sens1));
509 	if (ret)
510 		goto unlock;
511 
512 	/* write second sensitivity block */
513 	ret = wiimote_cmd_write(wdata, 0xb0001a, data_sens2,
514 							sizeof(data_sens2));
515 	if (ret)
516 		goto unlock;
517 
518 	/* put IR cam into desired state */
519 	switch (mode) {
520 		case WIIPROTO_FLAG_IR_FULL:
521 			format = 5;
522 			break;
523 		case WIIPROTO_FLAG_IR_EXT:
524 			format = 3;
525 			break;
526 		case WIIPROTO_FLAG_IR_BASIC:
527 			format = 1;
528 			break;
529 	}
530 	ret = wiimote_cmd_write(wdata, 0xb00033, &format, sizeof(format));
531 	if (ret)
532 		goto unlock;
533 
534 	/* make IR cam send data */
535 	ret = wiimote_cmd_write(wdata, 0xb00030, data_fin, sizeof(data_fin));
536 	if (ret)
537 		goto unlock;
538 
539 	/* request new DRM mode compatible to IR mode */
540 	spin_lock_irqsave(&wdata->state.lock, flags);
541 	wdata->state.flags &= ~WIIPROTO_FLAGS_IR;
542 	wdata->state.flags |= mode & WIIPROTO_FLAGS_IR;
543 	wiiproto_req_drm(wdata, WIIPROTO_REQ_NULL);
544 	spin_unlock_irqrestore(&wdata->state.lock, flags);
545 
546 unlock:
547 	wiimote_cmd_release(wdata);
548 	return ret;
549 }
550 
551 static enum led_brightness wiimote_leds_get(struct led_classdev *led_dev)
552 {
553 	struct wiimote_data *wdata;
554 	struct device *dev = led_dev->dev->parent;
555 	int i;
556 	unsigned long flags;
557 	bool value = false;
558 
559 	wdata = hid_get_drvdata(container_of(dev, struct hid_device, dev));
560 
561 	for (i = 0; i < 4; ++i) {
562 		if (wdata->leds[i] == led_dev) {
563 			spin_lock_irqsave(&wdata->state.lock, flags);
564 			value = wdata->state.flags & WIIPROTO_FLAG_LED(i + 1);
565 			spin_unlock_irqrestore(&wdata->state.lock, flags);
566 			break;
567 		}
568 	}
569 
570 	return value ? LED_FULL : LED_OFF;
571 }
572 
573 static void wiimote_leds_set(struct led_classdev *led_dev,
574 						enum led_brightness value)
575 {
576 	struct wiimote_data *wdata;
577 	struct device *dev = led_dev->dev->parent;
578 	int i;
579 	unsigned long flags;
580 	__u8 state, flag;
581 
582 	wdata = hid_get_drvdata(container_of(dev, struct hid_device, dev));
583 
584 	for (i = 0; i < 4; ++i) {
585 		if (wdata->leds[i] == led_dev) {
586 			flag = WIIPROTO_FLAG_LED(i + 1);
587 			spin_lock_irqsave(&wdata->state.lock, flags);
588 			state = wdata->state.flags;
589 			if (value == LED_OFF)
590 				wiiproto_req_leds(wdata, state & ~flag);
591 			else
592 				wiiproto_req_leds(wdata, state | flag);
593 			spin_unlock_irqrestore(&wdata->state.lock, flags);
594 			break;
595 		}
596 	}
597 }
598 
599 static int wiimote_ff_play(struct input_dev *dev, void *data,
600 							struct ff_effect *eff)
601 {
602 	struct wiimote_data *wdata = input_get_drvdata(dev);
603 	__u8 value;
604 	unsigned long flags;
605 
606 	/*
607 	 * The wiimote supports only a single rumble motor so if any magnitude
608 	 * is set to non-zero then we start the rumble motor. If both are set to
609 	 * zero, we stop the rumble motor.
610 	 */
611 
612 	if (eff->u.rumble.strong_magnitude || eff->u.rumble.weak_magnitude)
613 		value = 1;
614 	else
615 		value = 0;
616 
617 	spin_lock_irqsave(&wdata->state.lock, flags);
618 	wiiproto_req_rumble(wdata, value);
619 	spin_unlock_irqrestore(&wdata->state.lock, flags);
620 
621 	return 0;
622 }
623 
624 static int wiimote_input_open(struct input_dev *dev)
625 {
626 	struct wiimote_data *wdata = input_get_drvdata(dev);
627 
628 	return hid_hw_open(wdata->hdev);
629 }
630 
631 static void wiimote_input_close(struct input_dev *dev)
632 {
633 	struct wiimote_data *wdata = input_get_drvdata(dev);
634 
635 	hid_hw_close(wdata->hdev);
636 }
637 
638 static int wiimote_accel_open(struct input_dev *dev)
639 {
640 	struct wiimote_data *wdata = input_get_drvdata(dev);
641 	int ret;
642 	unsigned long flags;
643 
644 	ret = hid_hw_open(wdata->hdev);
645 	if (ret)
646 		return ret;
647 
648 	spin_lock_irqsave(&wdata->state.lock, flags);
649 	wiiproto_req_accel(wdata, true);
650 	spin_unlock_irqrestore(&wdata->state.lock, flags);
651 
652 	return 0;
653 }
654 
655 static void wiimote_accel_close(struct input_dev *dev)
656 {
657 	struct wiimote_data *wdata = input_get_drvdata(dev);
658 	unsigned long flags;
659 
660 	spin_lock_irqsave(&wdata->state.lock, flags);
661 	wiiproto_req_accel(wdata, false);
662 	spin_unlock_irqrestore(&wdata->state.lock, flags);
663 
664 	hid_hw_close(wdata->hdev);
665 }
666 
667 static int wiimote_ir_open(struct input_dev *dev)
668 {
669 	struct wiimote_data *wdata = input_get_drvdata(dev);
670 	int ret;
671 
672 	ret = hid_hw_open(wdata->hdev);
673 	if (ret)
674 		return ret;
675 
676 	ret = wiimote_init_ir(wdata, WIIPROTO_FLAG_IR_BASIC);
677 	if (ret) {
678 		hid_hw_close(wdata->hdev);
679 		return ret;
680 	}
681 
682 	return 0;
683 }
684 
685 static void wiimote_ir_close(struct input_dev *dev)
686 {
687 	struct wiimote_data *wdata = input_get_drvdata(dev);
688 
689 	wiimote_init_ir(wdata, 0);
690 	hid_hw_close(wdata->hdev);
691 }
692 
693 static void handler_keys(struct wiimote_data *wdata, const __u8 *payload)
694 {
695 	input_report_key(wdata->input, wiiproto_keymap[WIIPROTO_KEY_LEFT],
696 							!!(payload[0] & 0x01));
697 	input_report_key(wdata->input, wiiproto_keymap[WIIPROTO_KEY_RIGHT],
698 							!!(payload[0] & 0x02));
699 	input_report_key(wdata->input, wiiproto_keymap[WIIPROTO_KEY_DOWN],
700 							!!(payload[0] & 0x04));
701 	input_report_key(wdata->input, wiiproto_keymap[WIIPROTO_KEY_UP],
702 							!!(payload[0] & 0x08));
703 	input_report_key(wdata->input, wiiproto_keymap[WIIPROTO_KEY_PLUS],
704 							!!(payload[0] & 0x10));
705 	input_report_key(wdata->input, wiiproto_keymap[WIIPROTO_KEY_TWO],
706 							!!(payload[1] & 0x01));
707 	input_report_key(wdata->input, wiiproto_keymap[WIIPROTO_KEY_ONE],
708 							!!(payload[1] & 0x02));
709 	input_report_key(wdata->input, wiiproto_keymap[WIIPROTO_KEY_B],
710 							!!(payload[1] & 0x04));
711 	input_report_key(wdata->input, wiiproto_keymap[WIIPROTO_KEY_A],
712 							!!(payload[1] & 0x08));
713 	input_report_key(wdata->input, wiiproto_keymap[WIIPROTO_KEY_MINUS],
714 							!!(payload[1] & 0x10));
715 	input_report_key(wdata->input, wiiproto_keymap[WIIPROTO_KEY_HOME],
716 							!!(payload[1] & 0x80));
717 	input_sync(wdata->input);
718 }
719 
720 static void handler_accel(struct wiimote_data *wdata, const __u8 *payload)
721 {
722 	__u16 x, y, z;
723 
724 	if (!(wdata->state.flags & WIIPROTO_FLAG_ACCEL))
725 		return;
726 
727 	/*
728 	 * payload is: BB BB XX YY ZZ
729 	 * Accelerometer data is encoded into 3 10bit values. XX, YY and ZZ
730 	 * contain the upper 8 bits of each value. The lower 2 bits are
731 	 * contained in the buttons data BB BB.
732 	 * Bits 6 and 7 of the first buttons byte BB is the lower 2 bits of the
733 	 * X accel value. Bit 5 of the second buttons byte is the 2nd bit of Y
734 	 * accel value and bit 6 is the second bit of the Z value.
735 	 * The first bit of Y and Z values is not available and always set to 0.
736 	 * 0x200 is returned on no movement.
737 	 */
738 
739 	x = payload[2] << 2;
740 	y = payload[3] << 2;
741 	z = payload[4] << 2;
742 
743 	x |= (payload[0] >> 5) & 0x3;
744 	y |= (payload[1] >> 4) & 0x2;
745 	z |= (payload[1] >> 5) & 0x2;
746 
747 	input_report_abs(wdata->accel, ABS_RX, x - 0x200);
748 	input_report_abs(wdata->accel, ABS_RY, y - 0x200);
749 	input_report_abs(wdata->accel, ABS_RZ, z - 0x200);
750 	input_sync(wdata->accel);
751 }
752 
753 #define ir_to_input0(wdata, ir, packed) __ir_to_input((wdata), (ir), (packed), \
754 							ABS_HAT0X, ABS_HAT0Y)
755 #define ir_to_input1(wdata, ir, packed) __ir_to_input((wdata), (ir), (packed), \
756 							ABS_HAT1X, ABS_HAT1Y)
757 #define ir_to_input2(wdata, ir, packed) __ir_to_input((wdata), (ir), (packed), \
758 							ABS_HAT2X, ABS_HAT2Y)
759 #define ir_to_input3(wdata, ir, packed) __ir_to_input((wdata), (ir), (packed), \
760 							ABS_HAT3X, ABS_HAT3Y)
761 
762 static void __ir_to_input(struct wiimote_data *wdata, const __u8 *ir,
763 						bool packed, __u8 xid, __u8 yid)
764 {
765 	__u16 x, y;
766 
767 	if (!(wdata->state.flags & WIIPROTO_FLAGS_IR))
768 		return;
769 
770 	/*
771 	 * Basic IR data is encoded into 3 bytes. The first two bytes are the
772 	 * upper 8 bit of the X/Y data, the 3rd byte contains the lower 2 bits
773 	 * of both.
774 	 * If data is packed, then the 3rd byte is put first and slightly
775 	 * reordered. This allows to interleave packed and non-packed data to
776 	 * have two IR sets in 5 bytes instead of 6.
777 	 * The resulting 10bit X/Y values are passed to the ABS_HATXY input dev.
778 	 */
779 
780 	if (packed) {
781 		x = ir[1] << 2;
782 		y = ir[2] << 2;
783 
784 		x |= ir[0] & 0x3;
785 		y |= (ir[0] >> 2) & 0x3;
786 	} else {
787 		x = ir[0] << 2;
788 		y = ir[1] << 2;
789 
790 		x |= (ir[2] >> 4) & 0x3;
791 		y |= (ir[2] >> 6) & 0x3;
792 	}
793 
794 	input_report_abs(wdata->ir, xid, x);
795 	input_report_abs(wdata->ir, yid, y);
796 }
797 
798 static void handler_status(struct wiimote_data *wdata, const __u8 *payload)
799 {
800 	handler_keys(wdata, payload);
801 
802 	/* on status reports the drm is reset so we need to resend the drm */
803 	wiiproto_req_drm(wdata, WIIPROTO_REQ_NULL);
804 
805 	wiiext_event(wdata, payload[2] & 0x02);
806 
807 	if (wiimote_cmd_pending(wdata, WIIPROTO_REQ_SREQ, 0)) {
808 		wdata->state.cmd_battery = payload[5];
809 		wiimote_cmd_complete(wdata);
810 	}
811 }
812 
813 static void handler_data(struct wiimote_data *wdata, const __u8 *payload)
814 {
815 	__u16 offset = payload[3] << 8 | payload[4];
816 	__u8 size = (payload[2] >> 4) + 1;
817 	__u8 err = payload[2] & 0x0f;
818 
819 	handler_keys(wdata, payload);
820 
821 	if (wiimote_cmd_pending(wdata, WIIPROTO_REQ_RMEM, offset)) {
822 		if (err)
823 			size = 0;
824 		else if (size > wdata->state.cmd_read_size)
825 			size = wdata->state.cmd_read_size;
826 
827 		wdata->state.cmd_read_size = size;
828 		if (wdata->state.cmd_read_buf)
829 			memcpy(wdata->state.cmd_read_buf, &payload[5], size);
830 		wiimote_cmd_complete(wdata);
831 	}
832 }
833 
834 static void handler_return(struct wiimote_data *wdata, const __u8 *payload)
835 {
836 	__u8 err = payload[3];
837 	__u8 cmd = payload[2];
838 
839 	handler_keys(wdata, payload);
840 
841 	if (wiimote_cmd_pending(wdata, cmd, 0)) {
842 		wdata->state.cmd_err = err;
843 		wiimote_cmd_complete(wdata);
844 	} else if (err) {
845 		hid_warn(wdata->hdev, "Remote error %hhu on req %hhu\n", err,
846 									cmd);
847 	}
848 }
849 
850 static void handler_drm_KA(struct wiimote_data *wdata, const __u8 *payload)
851 {
852 	handler_keys(wdata, payload);
853 	handler_accel(wdata, payload);
854 }
855 
856 static void handler_drm_KE(struct wiimote_data *wdata, const __u8 *payload)
857 {
858 	handler_keys(wdata, payload);
859 	wiiext_handle(wdata, &payload[2]);
860 }
861 
862 static void handler_drm_KAI(struct wiimote_data *wdata, const __u8 *payload)
863 {
864 	handler_keys(wdata, payload);
865 	handler_accel(wdata, payload);
866 	ir_to_input0(wdata, &payload[5], false);
867 	ir_to_input1(wdata, &payload[8], false);
868 	ir_to_input2(wdata, &payload[11], false);
869 	ir_to_input3(wdata, &payload[14], false);
870 	input_sync(wdata->ir);
871 }
872 
873 static void handler_drm_KEE(struct wiimote_data *wdata, const __u8 *payload)
874 {
875 	handler_keys(wdata, payload);
876 	wiiext_handle(wdata, &payload[2]);
877 }
878 
879 static void handler_drm_KIE(struct wiimote_data *wdata, const __u8 *payload)
880 {
881 	handler_keys(wdata, payload);
882 	ir_to_input0(wdata, &payload[2], false);
883 	ir_to_input1(wdata, &payload[4], true);
884 	ir_to_input2(wdata, &payload[7], false);
885 	ir_to_input3(wdata, &payload[9], true);
886 	input_sync(wdata->ir);
887 	wiiext_handle(wdata, &payload[12]);
888 }
889 
890 static void handler_drm_KAE(struct wiimote_data *wdata, const __u8 *payload)
891 {
892 	handler_keys(wdata, payload);
893 	handler_accel(wdata, payload);
894 	wiiext_handle(wdata, &payload[5]);
895 }
896 
897 static void handler_drm_KAIE(struct wiimote_data *wdata, const __u8 *payload)
898 {
899 	handler_keys(wdata, payload);
900 	handler_accel(wdata, payload);
901 	ir_to_input0(wdata, &payload[5], false);
902 	ir_to_input1(wdata, &payload[7], true);
903 	ir_to_input2(wdata, &payload[10], false);
904 	ir_to_input3(wdata, &payload[12], true);
905 	input_sync(wdata->ir);
906 	wiiext_handle(wdata, &payload[15]);
907 }
908 
909 static void handler_drm_E(struct wiimote_data *wdata, const __u8 *payload)
910 {
911 	wiiext_handle(wdata, payload);
912 }
913 
914 static void handler_drm_SKAI1(struct wiimote_data *wdata, const __u8 *payload)
915 {
916 	handler_keys(wdata, payload);
917 
918 	wdata->state.accel_split[0] = payload[2];
919 	wdata->state.accel_split[1] = (payload[0] >> 1) & (0x10 | 0x20);
920 	wdata->state.accel_split[1] |= (payload[1] << 1) & (0x40 | 0x80);
921 
922 	ir_to_input0(wdata, &payload[3], false);
923 	ir_to_input1(wdata, &payload[12], false);
924 	input_sync(wdata->ir);
925 }
926 
927 static void handler_drm_SKAI2(struct wiimote_data *wdata, const __u8 *payload)
928 {
929 	__u8 buf[5];
930 
931 	handler_keys(wdata, payload);
932 
933 	wdata->state.accel_split[1] |= (payload[0] >> 5) & (0x01 | 0x02);
934 	wdata->state.accel_split[1] |= (payload[1] >> 3) & (0x04 | 0x08);
935 
936 	buf[0] = 0;
937 	buf[1] = 0;
938 	buf[2] = wdata->state.accel_split[0];
939 	buf[3] = payload[2];
940 	buf[4] = wdata->state.accel_split[1];
941 	handler_accel(wdata, buf);
942 
943 	ir_to_input2(wdata, &payload[3], false);
944 	ir_to_input3(wdata, &payload[12], false);
945 	input_sync(wdata->ir);
946 }
947 
948 struct wiiproto_handler {
949 	__u8 id;
950 	size_t size;
951 	void (*func)(struct wiimote_data *wdata, const __u8 *payload);
952 };
953 
954 static struct wiiproto_handler handlers[] = {
955 	{ .id = WIIPROTO_REQ_STATUS, .size = 6, .func = handler_status },
956 	{ .id = WIIPROTO_REQ_DATA, .size = 21, .func = handler_data },
957 	{ .id = WIIPROTO_REQ_RETURN, .size = 4, .func = handler_return },
958 	{ .id = WIIPROTO_REQ_DRM_K, .size = 2, .func = handler_keys },
959 	{ .id = WIIPROTO_REQ_DRM_KA, .size = 5, .func = handler_drm_KA },
960 	{ .id = WIIPROTO_REQ_DRM_KE, .size = 10, .func = handler_drm_KE },
961 	{ .id = WIIPROTO_REQ_DRM_KAI, .size = 17, .func = handler_drm_KAI },
962 	{ .id = WIIPROTO_REQ_DRM_KEE, .size = 21, .func = handler_drm_KEE },
963 	{ .id = WIIPROTO_REQ_DRM_KAE, .size = 21, .func = handler_drm_KAE },
964 	{ .id = WIIPROTO_REQ_DRM_KIE, .size = 21, .func = handler_drm_KIE },
965 	{ .id = WIIPROTO_REQ_DRM_KAIE, .size = 21, .func = handler_drm_KAIE },
966 	{ .id = WIIPROTO_REQ_DRM_E, .size = 21, .func = handler_drm_E },
967 	{ .id = WIIPROTO_REQ_DRM_SKAI1, .size = 21, .func = handler_drm_SKAI1 },
968 	{ .id = WIIPROTO_REQ_DRM_SKAI2, .size = 21, .func = handler_drm_SKAI2 },
969 	{ .id = 0 }
970 };
971 
972 static int wiimote_hid_event(struct hid_device *hdev, struct hid_report *report,
973 							u8 *raw_data, int size)
974 {
975 	struct wiimote_data *wdata = hid_get_drvdata(hdev);
976 	struct wiiproto_handler *h;
977 	int i;
978 	unsigned long flags;
979 	bool handled = false;
980 
981 	if (size < 1)
982 		return -EINVAL;
983 
984 	spin_lock_irqsave(&wdata->state.lock, flags);
985 
986 	for (i = 0; handlers[i].id; ++i) {
987 		h = &handlers[i];
988 		if (h->id == raw_data[0] && h->size < size) {
989 			h->func(wdata, &raw_data[1]);
990 			handled = true;
991 		}
992 	}
993 
994 	if (!handled)
995 		hid_warn(hdev, "Unhandled report %hhu size %d\n", raw_data[0],
996 									size);
997 
998 	spin_unlock_irqrestore(&wdata->state.lock, flags);
999 
1000 	return 0;
1001 }
1002 
1003 static void wiimote_leds_destroy(struct wiimote_data *wdata)
1004 {
1005 	int i;
1006 	struct led_classdev *led;
1007 
1008 	for (i = 0; i < 4; ++i) {
1009 		if (wdata->leds[i]) {
1010 			led = wdata->leds[i];
1011 			wdata->leds[i] = NULL;
1012 			led_classdev_unregister(led);
1013 			kfree(led);
1014 		}
1015 	}
1016 }
1017 
1018 static int wiimote_leds_create(struct wiimote_data *wdata)
1019 {
1020 	int i, ret;
1021 	struct device *dev = &wdata->hdev->dev;
1022 	size_t namesz = strlen(dev_name(dev)) + 9;
1023 	struct led_classdev *led;
1024 	char *name;
1025 
1026 	for (i = 0; i < 4; ++i) {
1027 		led = kzalloc(sizeof(struct led_classdev) + namesz, GFP_KERNEL);
1028 		if (!led) {
1029 			ret = -ENOMEM;
1030 			goto err;
1031 		}
1032 		name = (void*)&led[1];
1033 		snprintf(name, namesz, "%s:blue:p%d", dev_name(dev), i);
1034 		led->name = name;
1035 		led->brightness = 0;
1036 		led->max_brightness = 1;
1037 		led->brightness_get = wiimote_leds_get;
1038 		led->brightness_set = wiimote_leds_set;
1039 
1040 		ret = led_classdev_register(dev, led);
1041 		if (ret) {
1042 			kfree(led);
1043 			goto err;
1044 		}
1045 		wdata->leds[i] = led;
1046 	}
1047 
1048 	return 0;
1049 
1050 err:
1051 	wiimote_leds_destroy(wdata);
1052 	return ret;
1053 }
1054 
1055 static struct wiimote_data *wiimote_create(struct hid_device *hdev)
1056 {
1057 	struct wiimote_data *wdata;
1058 	int i;
1059 
1060 	wdata = kzalloc(sizeof(*wdata), GFP_KERNEL);
1061 	if (!wdata)
1062 		return NULL;
1063 
1064 	wdata->input = input_allocate_device();
1065 	if (!wdata->input)
1066 		goto err;
1067 
1068 	wdata->hdev = hdev;
1069 	hid_set_drvdata(hdev, wdata);
1070 
1071 	input_set_drvdata(wdata->input, wdata);
1072 	wdata->input->open = wiimote_input_open;
1073 	wdata->input->close = wiimote_input_close;
1074 	wdata->input->dev.parent = &wdata->hdev->dev;
1075 	wdata->input->id.bustype = wdata->hdev->bus;
1076 	wdata->input->id.vendor = wdata->hdev->vendor;
1077 	wdata->input->id.product = wdata->hdev->product;
1078 	wdata->input->id.version = wdata->hdev->version;
1079 	wdata->input->name = WIIMOTE_NAME;
1080 
1081 	set_bit(EV_KEY, wdata->input->evbit);
1082 	for (i = 0; i < WIIPROTO_KEY_COUNT; ++i)
1083 		set_bit(wiiproto_keymap[i], wdata->input->keybit);
1084 
1085 	set_bit(FF_RUMBLE, wdata->input->ffbit);
1086 	if (input_ff_create_memless(wdata->input, NULL, wiimote_ff_play))
1087 		goto err_input;
1088 
1089 	wdata->accel = input_allocate_device();
1090 	if (!wdata->accel)
1091 		goto err_input;
1092 
1093 	input_set_drvdata(wdata->accel, wdata);
1094 	wdata->accel->open = wiimote_accel_open;
1095 	wdata->accel->close = wiimote_accel_close;
1096 	wdata->accel->dev.parent = &wdata->hdev->dev;
1097 	wdata->accel->id.bustype = wdata->hdev->bus;
1098 	wdata->accel->id.vendor = wdata->hdev->vendor;
1099 	wdata->accel->id.product = wdata->hdev->product;
1100 	wdata->accel->id.version = wdata->hdev->version;
1101 	wdata->accel->name = WIIMOTE_NAME " Accelerometer";
1102 
1103 	set_bit(EV_ABS, wdata->accel->evbit);
1104 	set_bit(ABS_RX, wdata->accel->absbit);
1105 	set_bit(ABS_RY, wdata->accel->absbit);
1106 	set_bit(ABS_RZ, wdata->accel->absbit);
1107 	input_set_abs_params(wdata->accel, ABS_RX, -500, 500, 2, 4);
1108 	input_set_abs_params(wdata->accel, ABS_RY, -500, 500, 2, 4);
1109 	input_set_abs_params(wdata->accel, ABS_RZ, -500, 500, 2, 4);
1110 
1111 	wdata->ir = input_allocate_device();
1112 	if (!wdata->ir)
1113 		goto err_ir;
1114 
1115 	input_set_drvdata(wdata->ir, wdata);
1116 	wdata->ir->open = wiimote_ir_open;
1117 	wdata->ir->close = wiimote_ir_close;
1118 	wdata->ir->dev.parent = &wdata->hdev->dev;
1119 	wdata->ir->id.bustype = wdata->hdev->bus;
1120 	wdata->ir->id.vendor = wdata->hdev->vendor;
1121 	wdata->ir->id.product = wdata->hdev->product;
1122 	wdata->ir->id.version = wdata->hdev->version;
1123 	wdata->ir->name = WIIMOTE_NAME " IR";
1124 
1125 	set_bit(EV_ABS, wdata->ir->evbit);
1126 	set_bit(ABS_HAT0X, wdata->ir->absbit);
1127 	set_bit(ABS_HAT0Y, wdata->ir->absbit);
1128 	set_bit(ABS_HAT1X, wdata->ir->absbit);
1129 	set_bit(ABS_HAT1Y, wdata->ir->absbit);
1130 	set_bit(ABS_HAT2X, wdata->ir->absbit);
1131 	set_bit(ABS_HAT2Y, wdata->ir->absbit);
1132 	set_bit(ABS_HAT3X, wdata->ir->absbit);
1133 	set_bit(ABS_HAT3Y, wdata->ir->absbit);
1134 	input_set_abs_params(wdata->ir, ABS_HAT0X, 0, 1023, 2, 4);
1135 	input_set_abs_params(wdata->ir, ABS_HAT0Y, 0, 767, 2, 4);
1136 	input_set_abs_params(wdata->ir, ABS_HAT1X, 0, 1023, 2, 4);
1137 	input_set_abs_params(wdata->ir, ABS_HAT1Y, 0, 767, 2, 4);
1138 	input_set_abs_params(wdata->ir, ABS_HAT2X, 0, 1023, 2, 4);
1139 	input_set_abs_params(wdata->ir, ABS_HAT2Y, 0, 767, 2, 4);
1140 	input_set_abs_params(wdata->ir, ABS_HAT3X, 0, 1023, 2, 4);
1141 	input_set_abs_params(wdata->ir, ABS_HAT3Y, 0, 767, 2, 4);
1142 
1143 	spin_lock_init(&wdata->qlock);
1144 	INIT_WORK(&wdata->worker, wiimote_worker);
1145 
1146 	spin_lock_init(&wdata->state.lock);
1147 	init_completion(&wdata->state.ready);
1148 	mutex_init(&wdata->state.sync);
1149 	wdata->state.drm = WIIPROTO_REQ_DRM_K;
1150 
1151 	return wdata;
1152 
1153 err_ir:
1154 	input_free_device(wdata->accel);
1155 err_input:
1156 	input_free_device(wdata->input);
1157 err:
1158 	kfree(wdata);
1159 	return NULL;
1160 }
1161 
1162 static void wiimote_destroy(struct wiimote_data *wdata)
1163 {
1164 	wiidebug_deinit(wdata);
1165 	wiiext_deinit(wdata);
1166 	wiimote_leds_destroy(wdata);
1167 
1168 	power_supply_unregister(&wdata->battery);
1169 	input_unregister_device(wdata->accel);
1170 	input_unregister_device(wdata->ir);
1171 	input_unregister_device(wdata->input);
1172 	cancel_work_sync(&wdata->worker);
1173 	hid_hw_stop(wdata->hdev);
1174 
1175 	kfree(wdata);
1176 }
1177 
1178 static int wiimote_hid_probe(struct hid_device *hdev,
1179 				const struct hid_device_id *id)
1180 {
1181 	struct wiimote_data *wdata;
1182 	int ret;
1183 
1184 	hdev->quirks |= HID_QUIRK_NO_INIT_REPORTS;
1185 
1186 	wdata = wiimote_create(hdev);
1187 	if (!wdata) {
1188 		hid_err(hdev, "Can't alloc device\n");
1189 		return -ENOMEM;
1190 	}
1191 
1192 	ret = hid_parse(hdev);
1193 	if (ret) {
1194 		hid_err(hdev, "HID parse failed\n");
1195 		goto err;
1196 	}
1197 
1198 	ret = hid_hw_start(hdev, HID_CONNECT_HIDRAW);
1199 	if (ret) {
1200 		hid_err(hdev, "HW start failed\n");
1201 		goto err;
1202 	}
1203 
1204 	ret = input_register_device(wdata->accel);
1205 	if (ret) {
1206 		hid_err(hdev, "Cannot register input device\n");
1207 		goto err_stop;
1208 	}
1209 
1210 	ret = input_register_device(wdata->ir);
1211 	if (ret) {
1212 		hid_err(hdev, "Cannot register input device\n");
1213 		goto err_ir;
1214 	}
1215 
1216 	ret = input_register_device(wdata->input);
1217 	if (ret) {
1218 		hid_err(hdev, "Cannot register input device\n");
1219 		goto err_input;
1220 	}
1221 
1222 	wdata->battery.properties = wiimote_battery_props;
1223 	wdata->battery.num_properties = ARRAY_SIZE(wiimote_battery_props);
1224 	wdata->battery.get_property = wiimote_battery_get_property;
1225 	wdata->battery.name = "wiimote_battery";
1226 	wdata->battery.type = POWER_SUPPLY_TYPE_BATTERY;
1227 	wdata->battery.use_for_apm = 0;
1228 
1229 	ret = power_supply_register(&wdata->hdev->dev, &wdata->battery);
1230 	if (ret) {
1231 		hid_err(hdev, "Cannot register battery device\n");
1232 		goto err_battery;
1233 	}
1234 
1235 	power_supply_powers(&wdata->battery, &hdev->dev);
1236 
1237 	ret = wiimote_leds_create(wdata);
1238 	if (ret)
1239 		goto err_free;
1240 
1241 	ret = wiiext_init(wdata);
1242 	if (ret)
1243 		goto err_free;
1244 
1245 	ret = wiidebug_init(wdata);
1246 	if (ret)
1247 		goto err_free;
1248 
1249 	hid_info(hdev, "New device registered\n");
1250 
1251 	/* by default set led1 after device initialization */
1252 	spin_lock_irq(&wdata->state.lock);
1253 	wiiproto_req_leds(wdata, WIIPROTO_FLAG_LED1);
1254 	spin_unlock_irq(&wdata->state.lock);
1255 
1256 	return 0;
1257 
1258 err_free:
1259 	wiimote_destroy(wdata);
1260 	return ret;
1261 
1262 err_battery:
1263 	input_unregister_device(wdata->input);
1264 	wdata->input = NULL;
1265 err_input:
1266 	input_unregister_device(wdata->ir);
1267 	wdata->ir = NULL;
1268 err_ir:
1269 	input_unregister_device(wdata->accel);
1270 	wdata->accel = NULL;
1271 err_stop:
1272 	hid_hw_stop(hdev);
1273 err:
1274 	input_free_device(wdata->ir);
1275 	input_free_device(wdata->accel);
1276 	input_free_device(wdata->input);
1277 	kfree(wdata);
1278 	return ret;
1279 }
1280 
1281 static void wiimote_hid_remove(struct hid_device *hdev)
1282 {
1283 	struct wiimote_data *wdata = hid_get_drvdata(hdev);
1284 
1285 	hid_info(hdev, "Device removed\n");
1286 	wiimote_destroy(wdata);
1287 }
1288 
1289 static const struct hid_device_id wiimote_hid_devices[] = {
1290 	{ HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_NINTENDO,
1291 				USB_DEVICE_ID_NINTENDO_WIIMOTE) },
1292 	{ }
1293 };
1294 MODULE_DEVICE_TABLE(hid, wiimote_hid_devices);
1295 
1296 static struct hid_driver wiimote_hid_driver = {
1297 	.name = "wiimote",
1298 	.id_table = wiimote_hid_devices,
1299 	.probe = wiimote_hid_probe,
1300 	.remove = wiimote_hid_remove,
1301 	.raw_event = wiimote_hid_event,
1302 };
1303 
1304 static int __init wiimote_init(void)
1305 {
1306 	int ret;
1307 
1308 	ret = hid_register_driver(&wiimote_hid_driver);
1309 	if (ret)
1310 		pr_err("Can't register wiimote hid driver\n");
1311 
1312 	return ret;
1313 }
1314 
1315 static void __exit wiimote_exit(void)
1316 {
1317 	hid_unregister_driver(&wiimote_hid_driver);
1318 }
1319 
1320 module_init(wiimote_init);
1321 module_exit(wiimote_exit);
1322 MODULE_LICENSE("GPL");
1323 MODULE_AUTHOR("David Herrmann <dh.herrmann@gmail.com>");
1324 MODULE_DESCRIPTION(WIIMOTE_NAME " Device Driver");
1325