1 /*
2  * Device Modules for Nintendo Wii / Wii U HID Driver
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 /*
14  * Wiimote Modules
15  * Nintendo devices provide different peripherals and many new devices lack
16  * initial features like the IR camera. Therefore, each peripheral device is
17  * implemented as an independent module and we probe on each device only the
18  * modules for the hardware that really is available.
19  *
20  * Module registration is sequential. Unregistration is done in reverse order.
21  * After device detection, the needed modules are loaded. Users can trigger
22  * re-detection which causes all modules to be unloaded and then reload the
23  * modules for the new detected device.
24  *
25  * wdata->input is a shared input device. It is always initialized prior to
26  * module registration. If at least one registered module is marked as
27  * WIIMOD_FLAG_INPUT, then the input device will get registered after all
28  * modules were registered.
29  * Please note that it is unregistered _before_ the "remove" callbacks are
30  * called. This guarantees that no input interaction is done, anymore. However,
31  * the wiimote core keeps a reference to the input device so it is freed only
32  * after all modules were removed. It is safe to send events to unregistered
33  * input devices.
34  */
35 
36 #include <linux/device.h>
37 #include <linux/hid.h>
38 #include <linux/input.h>
39 #include <linux/spinlock.h>
40 #include "hid-wiimote.h"
41 
42 /*
43  * Keys
44  * The initial Wii Remote provided a bunch of buttons that are reported as
45  * part of the core protocol. Many later devices dropped these and report
46  * invalid data in the core button reports. Load this only on devices which
47  * correctly send button reports.
48  * It uses the shared input device.
49  */
50 
51 static const __u16 wiimod_keys_map[] = {
52 	KEY_LEFT,	/* WIIPROTO_KEY_LEFT */
53 	KEY_RIGHT,	/* WIIPROTO_KEY_RIGHT */
54 	KEY_UP,		/* WIIPROTO_KEY_UP */
55 	KEY_DOWN,	/* WIIPROTO_KEY_DOWN */
56 	KEY_NEXT,	/* WIIPROTO_KEY_PLUS */
57 	KEY_PREVIOUS,	/* WIIPROTO_KEY_MINUS */
58 	BTN_1,		/* WIIPROTO_KEY_ONE */
59 	BTN_2,		/* WIIPROTO_KEY_TWO */
60 	BTN_A,		/* WIIPROTO_KEY_A */
61 	BTN_B,		/* WIIPROTO_KEY_B */
62 	BTN_MODE,	/* WIIPROTO_KEY_HOME */
63 };
64 
65 static void wiimod_keys_in_keys(struct wiimote_data *wdata, const __u8 *keys)
66 {
67 	input_report_key(wdata->input, wiimod_keys_map[WIIPROTO_KEY_LEFT],
68 							!!(keys[0] & 0x01));
69 	input_report_key(wdata->input, wiimod_keys_map[WIIPROTO_KEY_RIGHT],
70 							!!(keys[0] & 0x02));
71 	input_report_key(wdata->input, wiimod_keys_map[WIIPROTO_KEY_DOWN],
72 							!!(keys[0] & 0x04));
73 	input_report_key(wdata->input, wiimod_keys_map[WIIPROTO_KEY_UP],
74 							!!(keys[0] & 0x08));
75 	input_report_key(wdata->input, wiimod_keys_map[WIIPROTO_KEY_PLUS],
76 							!!(keys[0] & 0x10));
77 	input_report_key(wdata->input, wiimod_keys_map[WIIPROTO_KEY_TWO],
78 							!!(keys[1] & 0x01));
79 	input_report_key(wdata->input, wiimod_keys_map[WIIPROTO_KEY_ONE],
80 							!!(keys[1] & 0x02));
81 	input_report_key(wdata->input, wiimod_keys_map[WIIPROTO_KEY_B],
82 							!!(keys[1] & 0x04));
83 	input_report_key(wdata->input, wiimod_keys_map[WIIPROTO_KEY_A],
84 							!!(keys[1] & 0x08));
85 	input_report_key(wdata->input, wiimod_keys_map[WIIPROTO_KEY_MINUS],
86 							!!(keys[1] & 0x10));
87 	input_report_key(wdata->input, wiimod_keys_map[WIIPROTO_KEY_HOME],
88 							!!(keys[1] & 0x80));
89 	input_sync(wdata->input);
90 }
91 
92 static int wiimod_keys_probe(const struct wiimod_ops *ops,
93 			     struct wiimote_data *wdata)
94 {
95 	unsigned int i;
96 
97 	set_bit(EV_KEY, wdata->input->evbit);
98 	for (i = 0; i < WIIPROTO_KEY_COUNT; ++i)
99 		set_bit(wiimod_keys_map[i], wdata->input->keybit);
100 
101 	return 0;
102 }
103 
104 static const struct wiimod_ops wiimod_keys = {
105 	.flags = WIIMOD_FLAG_INPUT,
106 	.arg = 0,
107 	.probe = wiimod_keys_probe,
108 	.remove = NULL,
109 	.in_keys = wiimod_keys_in_keys,
110 };
111 
112 /*
113  * Rumble
114  * Nearly all devices provide a rumble feature. A small motor for
115  * force-feedback effects. We provide an FF_RUMBLE memless ff device on the
116  * shared input device if this module is loaded.
117  * The rumble motor is controlled via a flag on almost every output report so
118  * the wiimote core handles the rumble flag. But if a device doesn't provide
119  * the rumble motor, this flag shouldn't be set.
120  */
121 
122 /* used by wiimod_rumble and wiipro_rumble */
123 static void wiimod_rumble_worker(struct work_struct *work)
124 {
125 	struct wiimote_data *wdata = container_of(work, struct wiimote_data,
126 						  rumble_worker);
127 
128 	spin_lock_irq(&wdata->state.lock);
129 	wiiproto_req_rumble(wdata, wdata->state.cache_rumble);
130 	spin_unlock_irq(&wdata->state.lock);
131 }
132 
133 static int wiimod_rumble_play(struct input_dev *dev, void *data,
134 			      struct ff_effect *eff)
135 {
136 	struct wiimote_data *wdata = input_get_drvdata(dev);
137 	__u8 value;
138 
139 	/*
140 	 * The wiimote supports only a single rumble motor so if any magnitude
141 	 * is set to non-zero then we start the rumble motor. If both are set to
142 	 * zero, we stop the rumble motor.
143 	 */
144 
145 	if (eff->u.rumble.strong_magnitude || eff->u.rumble.weak_magnitude)
146 		value = 1;
147 	else
148 		value = 0;
149 
150 	/* Locking state.lock here might deadlock with input_event() calls.
151 	 * schedule_work acts as barrier. Merging multiple changes is fine. */
152 	wdata->state.cache_rumble = value;
153 	schedule_work(&wdata->rumble_worker);
154 
155 	return 0;
156 }
157 
158 static int wiimod_rumble_probe(const struct wiimod_ops *ops,
159 			       struct wiimote_data *wdata)
160 {
161 	INIT_WORK(&wdata->rumble_worker, wiimod_rumble_worker);
162 
163 	set_bit(FF_RUMBLE, wdata->input->ffbit);
164 	if (input_ff_create_memless(wdata->input, NULL, wiimod_rumble_play))
165 		return -ENOMEM;
166 
167 	return 0;
168 }
169 
170 static void wiimod_rumble_remove(const struct wiimod_ops *ops,
171 				 struct wiimote_data *wdata)
172 {
173 	unsigned long flags;
174 
175 	cancel_work_sync(&wdata->rumble_worker);
176 
177 	spin_lock_irqsave(&wdata->state.lock, flags);
178 	wiiproto_req_rumble(wdata, 0);
179 	spin_unlock_irqrestore(&wdata->state.lock, flags);
180 }
181 
182 static const struct wiimod_ops wiimod_rumble = {
183 	.flags = WIIMOD_FLAG_INPUT,
184 	.arg = 0,
185 	.probe = wiimod_rumble_probe,
186 	.remove = wiimod_rumble_remove,
187 };
188 
189 /*
190  * Battery
191  * 1 byte of battery capacity information is sent along every protocol status
192  * report. The wiimote core caches it but we try to update it on every
193  * user-space request.
194  * This is supported by nearly every device so it's almost always enabled.
195  */
196 
197 static enum power_supply_property wiimod_battery_props[] = {
198 	POWER_SUPPLY_PROP_CAPACITY,
199 	POWER_SUPPLY_PROP_SCOPE,
200 };
201 
202 static int wiimod_battery_get_property(struct power_supply *psy,
203 				       enum power_supply_property psp,
204 				       union power_supply_propval *val)
205 {
206 	struct wiimote_data *wdata = power_supply_get_drvdata(psy);
207 	int ret = 0, state;
208 	unsigned long flags;
209 
210 	if (psp == POWER_SUPPLY_PROP_SCOPE) {
211 		val->intval = POWER_SUPPLY_SCOPE_DEVICE;
212 		return 0;
213 	} else if (psp != POWER_SUPPLY_PROP_CAPACITY) {
214 		return -EINVAL;
215 	}
216 
217 	ret = wiimote_cmd_acquire(wdata);
218 	if (ret)
219 		return ret;
220 
221 	spin_lock_irqsave(&wdata->state.lock, flags);
222 	wiimote_cmd_set(wdata, WIIPROTO_REQ_SREQ, 0);
223 	wiiproto_req_status(wdata);
224 	spin_unlock_irqrestore(&wdata->state.lock, flags);
225 
226 	wiimote_cmd_wait(wdata);
227 	wiimote_cmd_release(wdata);
228 
229 	spin_lock_irqsave(&wdata->state.lock, flags);
230 	state = wdata->state.cmd_battery;
231 	spin_unlock_irqrestore(&wdata->state.lock, flags);
232 
233 	val->intval = state * 100 / 255;
234 	return ret;
235 }
236 
237 static int wiimod_battery_probe(const struct wiimod_ops *ops,
238 				struct wiimote_data *wdata)
239 {
240 	struct power_supply_config psy_cfg = { .drv_data = wdata, };
241 	int ret;
242 
243 	wdata->battery_desc.properties = wiimod_battery_props;
244 	wdata->battery_desc.num_properties = ARRAY_SIZE(wiimod_battery_props);
245 	wdata->battery_desc.get_property = wiimod_battery_get_property;
246 	wdata->battery_desc.type = POWER_SUPPLY_TYPE_BATTERY;
247 	wdata->battery_desc.use_for_apm = 0;
248 	wdata->battery_desc.name = kasprintf(GFP_KERNEL, "wiimote_battery_%s",
249 					     wdata->hdev->uniq);
250 	if (!wdata->battery_desc.name)
251 		return -ENOMEM;
252 
253 	wdata->battery = power_supply_register(&wdata->hdev->dev,
254 					       &wdata->battery_desc,
255 					       &psy_cfg);
256 	if (IS_ERR(wdata->battery)) {
257 		hid_err(wdata->hdev, "cannot register battery device\n");
258 		ret = PTR_ERR(wdata->battery);
259 		goto err_free;
260 	}
261 
262 	power_supply_powers(wdata->battery, &wdata->hdev->dev);
263 	return 0;
264 
265 err_free:
266 	kfree(wdata->battery_desc.name);
267 	wdata->battery_desc.name = NULL;
268 	return ret;
269 }
270 
271 static void wiimod_battery_remove(const struct wiimod_ops *ops,
272 				  struct wiimote_data *wdata)
273 {
274 	if (!wdata->battery_desc.name)
275 		return;
276 
277 	power_supply_unregister(wdata->battery);
278 	kfree(wdata->battery_desc.name);
279 	wdata->battery_desc.name = NULL;
280 }
281 
282 static const struct wiimod_ops wiimod_battery = {
283 	.flags = 0,
284 	.arg = 0,
285 	.probe = wiimod_battery_probe,
286 	.remove = wiimod_battery_remove,
287 };
288 
289 /*
290  * LED
291  * 0 to 4 player LEDs are supported by devices. The "arg" field of the
292  * wiimod_ops structure specifies which LED this module controls. This allows
293  * to register a limited number of LEDs.
294  * State is managed by wiimote core.
295  */
296 
297 static enum led_brightness wiimod_led_get(struct led_classdev *led_dev)
298 {
299 	struct device *dev = led_dev->dev->parent;
300 	struct wiimote_data *wdata = dev_to_wii(dev);
301 	int i;
302 	unsigned long flags;
303 	bool value = false;
304 
305 	for (i = 0; i < 4; ++i) {
306 		if (wdata->leds[i] == led_dev) {
307 			spin_lock_irqsave(&wdata->state.lock, flags);
308 			value = wdata->state.flags & WIIPROTO_FLAG_LED(i + 1);
309 			spin_unlock_irqrestore(&wdata->state.lock, flags);
310 			break;
311 		}
312 	}
313 
314 	return value ? LED_FULL : LED_OFF;
315 }
316 
317 static void wiimod_led_set(struct led_classdev *led_dev,
318 			   enum led_brightness value)
319 {
320 	struct device *dev = led_dev->dev->parent;
321 	struct wiimote_data *wdata = dev_to_wii(dev);
322 	int i;
323 	unsigned long flags;
324 	__u8 state, flag;
325 
326 	for (i = 0; i < 4; ++i) {
327 		if (wdata->leds[i] == led_dev) {
328 			flag = WIIPROTO_FLAG_LED(i + 1);
329 			spin_lock_irqsave(&wdata->state.lock, flags);
330 			state = wdata->state.flags;
331 			if (value == LED_OFF)
332 				wiiproto_req_leds(wdata, state & ~flag);
333 			else
334 				wiiproto_req_leds(wdata, state | flag);
335 			spin_unlock_irqrestore(&wdata->state.lock, flags);
336 			break;
337 		}
338 	}
339 }
340 
341 static int wiimod_led_probe(const struct wiimod_ops *ops,
342 			    struct wiimote_data *wdata)
343 {
344 	struct device *dev = &wdata->hdev->dev;
345 	size_t namesz = strlen(dev_name(dev)) + 9;
346 	struct led_classdev *led;
347 	unsigned long flags;
348 	char *name;
349 	int ret;
350 
351 	led = kzalloc(sizeof(struct led_classdev) + namesz, GFP_KERNEL);
352 	if (!led)
353 		return -ENOMEM;
354 
355 	name = (void*)&led[1];
356 	snprintf(name, namesz, "%s:blue:p%lu", dev_name(dev), ops->arg);
357 	led->name = name;
358 	led->brightness = 0;
359 	led->max_brightness = 1;
360 	led->brightness_get = wiimod_led_get;
361 	led->brightness_set = wiimod_led_set;
362 
363 	wdata->leds[ops->arg] = led;
364 	ret = led_classdev_register(dev, led);
365 	if (ret)
366 		goto err_free;
367 
368 	/* enable LED1 to stop initial LED-blinking */
369 	if (ops->arg == 0) {
370 		spin_lock_irqsave(&wdata->state.lock, flags);
371 		wiiproto_req_leds(wdata, WIIPROTO_FLAG_LED1);
372 		spin_unlock_irqrestore(&wdata->state.lock, flags);
373 	}
374 
375 	return 0;
376 
377 err_free:
378 	wdata->leds[ops->arg] = NULL;
379 	kfree(led);
380 	return ret;
381 }
382 
383 static void wiimod_led_remove(const struct wiimod_ops *ops,
384 			      struct wiimote_data *wdata)
385 {
386 	if (!wdata->leds[ops->arg])
387 		return;
388 
389 	led_classdev_unregister(wdata->leds[ops->arg]);
390 	kfree(wdata->leds[ops->arg]);
391 	wdata->leds[ops->arg] = NULL;
392 }
393 
394 static const struct wiimod_ops wiimod_leds[4] = {
395 	{
396 		.flags = 0,
397 		.arg = 0,
398 		.probe = wiimod_led_probe,
399 		.remove = wiimod_led_remove,
400 	},
401 	{
402 		.flags = 0,
403 		.arg = 1,
404 		.probe = wiimod_led_probe,
405 		.remove = wiimod_led_remove,
406 	},
407 	{
408 		.flags = 0,
409 		.arg = 2,
410 		.probe = wiimod_led_probe,
411 		.remove = wiimod_led_remove,
412 	},
413 	{
414 		.flags = 0,
415 		.arg = 3,
416 		.probe = wiimod_led_probe,
417 		.remove = wiimod_led_remove,
418 	},
419 };
420 
421 /*
422  * Accelerometer
423  * 3 axis accelerometer data is part of nearly all DRMs. If not supported by a
424  * device, it's mostly cleared to 0. This module parses this data and provides
425  * it via a separate input device.
426  */
427 
428 static void wiimod_accel_in_accel(struct wiimote_data *wdata,
429 				  const __u8 *accel)
430 {
431 	__u16 x, y, z;
432 
433 	if (!(wdata->state.flags & WIIPROTO_FLAG_ACCEL))
434 		return;
435 
436 	/*
437 	 * payload is: BB BB XX YY ZZ
438 	 * Accelerometer data is encoded into 3 10bit values. XX, YY and ZZ
439 	 * contain the upper 8 bits of each value. The lower 2 bits are
440 	 * contained in the buttons data BB BB.
441 	 * Bits 6 and 7 of the first buttons byte BB is the lower 2 bits of the
442 	 * X accel value. Bit 5 of the second buttons byte is the 2nd bit of Y
443 	 * accel value and bit 6 is the second bit of the Z value.
444 	 * The first bit of Y and Z values is not available and always set to 0.
445 	 * 0x200 is returned on no movement.
446 	 */
447 
448 	x = accel[2] << 2;
449 	y = accel[3] << 2;
450 	z = accel[4] << 2;
451 
452 	x |= (accel[0] >> 5) & 0x3;
453 	y |= (accel[1] >> 4) & 0x2;
454 	z |= (accel[1] >> 5) & 0x2;
455 
456 	input_report_abs(wdata->accel, ABS_RX, x - 0x200);
457 	input_report_abs(wdata->accel, ABS_RY, y - 0x200);
458 	input_report_abs(wdata->accel, ABS_RZ, z - 0x200);
459 	input_sync(wdata->accel);
460 }
461 
462 static int wiimod_accel_open(struct input_dev *dev)
463 {
464 	struct wiimote_data *wdata = input_get_drvdata(dev);
465 	unsigned long flags;
466 
467 	spin_lock_irqsave(&wdata->state.lock, flags);
468 	wiiproto_req_accel(wdata, true);
469 	spin_unlock_irqrestore(&wdata->state.lock, flags);
470 
471 	return 0;
472 }
473 
474 static void wiimod_accel_close(struct input_dev *dev)
475 {
476 	struct wiimote_data *wdata = input_get_drvdata(dev);
477 	unsigned long flags;
478 
479 	spin_lock_irqsave(&wdata->state.lock, flags);
480 	wiiproto_req_accel(wdata, false);
481 	spin_unlock_irqrestore(&wdata->state.lock, flags);
482 }
483 
484 static int wiimod_accel_probe(const struct wiimod_ops *ops,
485 			      struct wiimote_data *wdata)
486 {
487 	int ret;
488 
489 	wdata->accel = input_allocate_device();
490 	if (!wdata->accel)
491 		return -ENOMEM;
492 
493 	input_set_drvdata(wdata->accel, wdata);
494 	wdata->accel->open = wiimod_accel_open;
495 	wdata->accel->close = wiimod_accel_close;
496 	wdata->accel->dev.parent = &wdata->hdev->dev;
497 	wdata->accel->id.bustype = wdata->hdev->bus;
498 	wdata->accel->id.vendor = wdata->hdev->vendor;
499 	wdata->accel->id.product = wdata->hdev->product;
500 	wdata->accel->id.version = wdata->hdev->version;
501 	wdata->accel->name = WIIMOTE_NAME " Accelerometer";
502 
503 	set_bit(EV_ABS, wdata->accel->evbit);
504 	set_bit(ABS_RX, wdata->accel->absbit);
505 	set_bit(ABS_RY, wdata->accel->absbit);
506 	set_bit(ABS_RZ, wdata->accel->absbit);
507 	input_set_abs_params(wdata->accel, ABS_RX, -500, 500, 2, 4);
508 	input_set_abs_params(wdata->accel, ABS_RY, -500, 500, 2, 4);
509 	input_set_abs_params(wdata->accel, ABS_RZ, -500, 500, 2, 4);
510 
511 	ret = input_register_device(wdata->accel);
512 	if (ret) {
513 		hid_err(wdata->hdev, "cannot register input device\n");
514 		goto err_free;
515 	}
516 
517 	return 0;
518 
519 err_free:
520 	input_free_device(wdata->accel);
521 	wdata->accel = NULL;
522 	return ret;
523 }
524 
525 static void wiimod_accel_remove(const struct wiimod_ops *ops,
526 				struct wiimote_data *wdata)
527 {
528 	if (!wdata->accel)
529 		return;
530 
531 	input_unregister_device(wdata->accel);
532 	wdata->accel = NULL;
533 }
534 
535 static const struct wiimod_ops wiimod_accel = {
536 	.flags = 0,
537 	.arg = 0,
538 	.probe = wiimod_accel_probe,
539 	.remove = wiimod_accel_remove,
540 	.in_accel = wiimod_accel_in_accel,
541 };
542 
543 /*
544  * IR Cam
545  * Up to 4 IR sources can be tracked by a normal Wii Remote. The IR cam needs
546  * to be initialized with a fairly complex procedure and consumes a lot of
547  * power. Therefore, as long as no application uses the IR input device, it is
548  * kept offline.
549  * Nearly no other device than the normal Wii Remotes supports the IR cam so
550  * you can disable this module for these devices.
551  */
552 
553 static void wiimod_ir_in_ir(struct wiimote_data *wdata, const __u8 *ir,
554 			    bool packed, unsigned int id)
555 {
556 	__u16 x, y;
557 	__u8 xid, yid;
558 	bool sync = false;
559 
560 	if (!(wdata->state.flags & WIIPROTO_FLAGS_IR))
561 		return;
562 
563 	switch (id) {
564 	case 0:
565 		xid = ABS_HAT0X;
566 		yid = ABS_HAT0Y;
567 		break;
568 	case 1:
569 		xid = ABS_HAT1X;
570 		yid = ABS_HAT1Y;
571 		break;
572 	case 2:
573 		xid = ABS_HAT2X;
574 		yid = ABS_HAT2Y;
575 		break;
576 	case 3:
577 		xid = ABS_HAT3X;
578 		yid = ABS_HAT3Y;
579 		sync = true;
580 		break;
581 	default:
582 		return;
583 	}
584 
585 	/*
586 	 * Basic IR data is encoded into 3 bytes. The first two bytes are the
587 	 * lower 8 bit of the X/Y data, the 3rd byte contains the upper 2 bits
588 	 * of both.
589 	 * If data is packed, then the 3rd byte is put first and slightly
590 	 * reordered. This allows to interleave packed and non-packed data to
591 	 * have two IR sets in 5 bytes instead of 6.
592 	 * The resulting 10bit X/Y values are passed to the ABS_HAT? input dev.
593 	 */
594 
595 	if (packed) {
596 		x = ir[1] | ((ir[0] & 0x03) << 8);
597 		y = ir[2] | ((ir[0] & 0x0c) << 6);
598 	} else {
599 		x = ir[0] | ((ir[2] & 0x30) << 4);
600 		y = ir[1] | ((ir[2] & 0xc0) << 2);
601 	}
602 
603 	input_report_abs(wdata->ir, xid, x);
604 	input_report_abs(wdata->ir, yid, y);
605 
606 	if (sync)
607 		input_sync(wdata->ir);
608 }
609 
610 static int wiimod_ir_change(struct wiimote_data *wdata, __u16 mode)
611 {
612 	int ret;
613 	unsigned long flags;
614 	__u8 format = 0;
615 	static const __u8 data_enable[] = { 0x01 };
616 	static const __u8 data_sens1[] = { 0x02, 0x00, 0x00, 0x71, 0x01,
617 						0x00, 0xaa, 0x00, 0x64 };
618 	static const __u8 data_sens2[] = { 0x63, 0x03 };
619 	static const __u8 data_fin[] = { 0x08 };
620 
621 	spin_lock_irqsave(&wdata->state.lock, flags);
622 
623 	if (mode == (wdata->state.flags & WIIPROTO_FLAGS_IR)) {
624 		spin_unlock_irqrestore(&wdata->state.lock, flags);
625 		return 0;
626 	}
627 
628 	if (mode == 0) {
629 		wdata->state.flags &= ~WIIPROTO_FLAGS_IR;
630 		wiiproto_req_ir1(wdata, 0);
631 		wiiproto_req_ir2(wdata, 0);
632 		wiiproto_req_drm(wdata, WIIPROTO_REQ_NULL);
633 		spin_unlock_irqrestore(&wdata->state.lock, flags);
634 		return 0;
635 	}
636 
637 	spin_unlock_irqrestore(&wdata->state.lock, flags);
638 
639 	ret = wiimote_cmd_acquire(wdata);
640 	if (ret)
641 		return ret;
642 
643 	/* send PIXEL CLOCK ENABLE cmd first */
644 	spin_lock_irqsave(&wdata->state.lock, flags);
645 	wiimote_cmd_set(wdata, WIIPROTO_REQ_IR1, 0);
646 	wiiproto_req_ir1(wdata, 0x06);
647 	spin_unlock_irqrestore(&wdata->state.lock, flags);
648 
649 	ret = wiimote_cmd_wait(wdata);
650 	if (ret)
651 		goto unlock;
652 	if (wdata->state.cmd_err) {
653 		ret = -EIO;
654 		goto unlock;
655 	}
656 
657 	/* enable IR LOGIC */
658 	spin_lock_irqsave(&wdata->state.lock, flags);
659 	wiimote_cmd_set(wdata, WIIPROTO_REQ_IR2, 0);
660 	wiiproto_req_ir2(wdata, 0x06);
661 	spin_unlock_irqrestore(&wdata->state.lock, flags);
662 
663 	ret = wiimote_cmd_wait(wdata);
664 	if (ret)
665 		goto unlock;
666 	if (wdata->state.cmd_err) {
667 		ret = -EIO;
668 		goto unlock;
669 	}
670 
671 	/* enable IR cam but do not make it send data, yet */
672 	ret = wiimote_cmd_write(wdata, 0xb00030, data_enable,
673 							sizeof(data_enable));
674 	if (ret)
675 		goto unlock;
676 
677 	/* write first sensitivity block */
678 	ret = wiimote_cmd_write(wdata, 0xb00000, data_sens1,
679 							sizeof(data_sens1));
680 	if (ret)
681 		goto unlock;
682 
683 	/* write second sensitivity block */
684 	ret = wiimote_cmd_write(wdata, 0xb0001a, data_sens2,
685 							sizeof(data_sens2));
686 	if (ret)
687 		goto unlock;
688 
689 	/* put IR cam into desired state */
690 	switch (mode) {
691 		case WIIPROTO_FLAG_IR_FULL:
692 			format = 5;
693 			break;
694 		case WIIPROTO_FLAG_IR_EXT:
695 			format = 3;
696 			break;
697 		case WIIPROTO_FLAG_IR_BASIC:
698 			format = 1;
699 			break;
700 	}
701 	ret = wiimote_cmd_write(wdata, 0xb00033, &format, sizeof(format));
702 	if (ret)
703 		goto unlock;
704 
705 	/* make IR cam send data */
706 	ret = wiimote_cmd_write(wdata, 0xb00030, data_fin, sizeof(data_fin));
707 	if (ret)
708 		goto unlock;
709 
710 	/* request new DRM mode compatible to IR mode */
711 	spin_lock_irqsave(&wdata->state.lock, flags);
712 	wdata->state.flags &= ~WIIPROTO_FLAGS_IR;
713 	wdata->state.flags |= mode & WIIPROTO_FLAGS_IR;
714 	wiiproto_req_drm(wdata, WIIPROTO_REQ_NULL);
715 	spin_unlock_irqrestore(&wdata->state.lock, flags);
716 
717 unlock:
718 	wiimote_cmd_release(wdata);
719 	return ret;
720 }
721 
722 static int wiimod_ir_open(struct input_dev *dev)
723 {
724 	struct wiimote_data *wdata = input_get_drvdata(dev);
725 
726 	return wiimod_ir_change(wdata, WIIPROTO_FLAG_IR_BASIC);
727 }
728 
729 static void wiimod_ir_close(struct input_dev *dev)
730 {
731 	struct wiimote_data *wdata = input_get_drvdata(dev);
732 
733 	wiimod_ir_change(wdata, 0);
734 }
735 
736 static int wiimod_ir_probe(const struct wiimod_ops *ops,
737 			   struct wiimote_data *wdata)
738 {
739 	int ret;
740 
741 	wdata->ir = input_allocate_device();
742 	if (!wdata->ir)
743 		return -ENOMEM;
744 
745 	input_set_drvdata(wdata->ir, wdata);
746 	wdata->ir->open = wiimod_ir_open;
747 	wdata->ir->close = wiimod_ir_close;
748 	wdata->ir->dev.parent = &wdata->hdev->dev;
749 	wdata->ir->id.bustype = wdata->hdev->bus;
750 	wdata->ir->id.vendor = wdata->hdev->vendor;
751 	wdata->ir->id.product = wdata->hdev->product;
752 	wdata->ir->id.version = wdata->hdev->version;
753 	wdata->ir->name = WIIMOTE_NAME " IR";
754 
755 	set_bit(EV_ABS, wdata->ir->evbit);
756 	set_bit(ABS_HAT0X, wdata->ir->absbit);
757 	set_bit(ABS_HAT0Y, wdata->ir->absbit);
758 	set_bit(ABS_HAT1X, wdata->ir->absbit);
759 	set_bit(ABS_HAT1Y, wdata->ir->absbit);
760 	set_bit(ABS_HAT2X, wdata->ir->absbit);
761 	set_bit(ABS_HAT2Y, wdata->ir->absbit);
762 	set_bit(ABS_HAT3X, wdata->ir->absbit);
763 	set_bit(ABS_HAT3Y, wdata->ir->absbit);
764 	input_set_abs_params(wdata->ir, ABS_HAT0X, 0, 1023, 2, 4);
765 	input_set_abs_params(wdata->ir, ABS_HAT0Y, 0, 767, 2, 4);
766 	input_set_abs_params(wdata->ir, ABS_HAT1X, 0, 1023, 2, 4);
767 	input_set_abs_params(wdata->ir, ABS_HAT1Y, 0, 767, 2, 4);
768 	input_set_abs_params(wdata->ir, ABS_HAT2X, 0, 1023, 2, 4);
769 	input_set_abs_params(wdata->ir, ABS_HAT2Y, 0, 767, 2, 4);
770 	input_set_abs_params(wdata->ir, ABS_HAT3X, 0, 1023, 2, 4);
771 	input_set_abs_params(wdata->ir, ABS_HAT3Y, 0, 767, 2, 4);
772 
773 	ret = input_register_device(wdata->ir);
774 	if (ret) {
775 		hid_err(wdata->hdev, "cannot register input device\n");
776 		goto err_free;
777 	}
778 
779 	return 0;
780 
781 err_free:
782 	input_free_device(wdata->ir);
783 	wdata->ir = NULL;
784 	return ret;
785 }
786 
787 static void wiimod_ir_remove(const struct wiimod_ops *ops,
788 			     struct wiimote_data *wdata)
789 {
790 	if (!wdata->ir)
791 		return;
792 
793 	input_unregister_device(wdata->ir);
794 	wdata->ir = NULL;
795 }
796 
797 static const struct wiimod_ops wiimod_ir = {
798 	.flags = 0,
799 	.arg = 0,
800 	.probe = wiimod_ir_probe,
801 	.remove = wiimod_ir_remove,
802 	.in_ir = wiimod_ir_in_ir,
803 };
804 
805 /*
806  * Nunchuk Extension
807  * The Nintendo Wii Nunchuk was the first official extension published by
808  * Nintendo. It provides two additional keys and a separate accelerometer. It
809  * can be hotplugged to standard Wii Remotes.
810  */
811 
812 enum wiimod_nunchuk_keys {
813 	WIIMOD_NUNCHUK_KEY_C,
814 	WIIMOD_NUNCHUK_KEY_Z,
815 	WIIMOD_NUNCHUK_KEY_NUM,
816 };
817 
818 static const __u16 wiimod_nunchuk_map[] = {
819 	BTN_C,		/* WIIMOD_NUNCHUK_KEY_C */
820 	BTN_Z,		/* WIIMOD_NUNCHUK_KEY_Z */
821 };
822 
823 static void wiimod_nunchuk_in_ext(struct wiimote_data *wdata, const __u8 *ext)
824 {
825 	__s16 x, y, z, bx, by;
826 
827 	/*   Byte |   8    7 |  6    5 |  4    3 |  2 |  1  |
828 	 *   -----+----------+---------+---------+----+-----+
829 	 *    1   |              Button X <7:0>             |
830 	 *    2   |              Button Y <7:0>             |
831 	 *   -----+----------+---------+---------+----+-----+
832 	 *    3   |               Speed X <9:2>             |
833 	 *    4   |               Speed Y <9:2>             |
834 	 *    5   |               Speed Z <9:2>             |
835 	 *   -----+----------+---------+---------+----+-----+
836 	 *    6   | Z <1:0>  | Y <1:0> | X <1:0> | BC | BZ  |
837 	 *   -----+----------+---------+---------+----+-----+
838 	 * Button X/Y is the analog stick. Speed X, Y and Z are the
839 	 * accelerometer data in the same format as the wiimote's accelerometer.
840 	 * The 6th byte contains the LSBs of the accelerometer data.
841 	 * BC and BZ are the C and Z buttons: 0 means pressed
842 	 *
843 	 * If reported interleaved with motionp, then the layout changes. The
844 	 * 5th and 6th byte changes to:
845 	 *   -----+-----------------------------------+-----+
846 	 *    5   |            Speed Z <9:3>          | EXT |
847 	 *   -----+--------+-----+-----+----+----+----+-----+
848 	 *    6   |Z <2:1> |Y <1>|X <1>| BC | BZ | 0  |  0  |
849 	 *   -----+--------+-----+-----+----+----+----+-----+
850 	 * All three accelerometer values lose their LSB. The other data is
851 	 * still available but slightly moved.
852 	 *
853 	 * Center data for button values is 128. Center value for accelerometer
854 	 * values it 512 / 0x200
855 	 */
856 
857 	bx = ext[0];
858 	by = ext[1];
859 	bx -= 128;
860 	by -= 128;
861 
862 	x = ext[2] << 2;
863 	y = ext[3] << 2;
864 	z = ext[4] << 2;
865 
866 	if (wdata->state.flags & WIIPROTO_FLAG_MP_ACTIVE) {
867 		x |= (ext[5] >> 3) & 0x02;
868 		y |= (ext[5] >> 4) & 0x02;
869 		z &= ~0x4;
870 		z |= (ext[5] >> 5) & 0x06;
871 	} else {
872 		x |= (ext[5] >> 2) & 0x03;
873 		y |= (ext[5] >> 4) & 0x03;
874 		z |= (ext[5] >> 6) & 0x03;
875 	}
876 
877 	x -= 0x200;
878 	y -= 0x200;
879 	z -= 0x200;
880 
881 	input_report_abs(wdata->extension.input, ABS_HAT0X, bx);
882 	input_report_abs(wdata->extension.input, ABS_HAT0Y, by);
883 
884 	input_report_abs(wdata->extension.input, ABS_RX, x);
885 	input_report_abs(wdata->extension.input, ABS_RY, y);
886 	input_report_abs(wdata->extension.input, ABS_RZ, z);
887 
888 	if (wdata->state.flags & WIIPROTO_FLAG_MP_ACTIVE) {
889 		input_report_key(wdata->extension.input,
890 			wiimod_nunchuk_map[WIIMOD_NUNCHUK_KEY_Z],
891 			!(ext[5] & 0x04));
892 		input_report_key(wdata->extension.input,
893 			wiimod_nunchuk_map[WIIMOD_NUNCHUK_KEY_C],
894 			!(ext[5] & 0x08));
895 	} else {
896 		input_report_key(wdata->extension.input,
897 			wiimod_nunchuk_map[WIIMOD_NUNCHUK_KEY_Z],
898 			!(ext[5] & 0x01));
899 		input_report_key(wdata->extension.input,
900 			wiimod_nunchuk_map[WIIMOD_NUNCHUK_KEY_C],
901 			!(ext[5] & 0x02));
902 	}
903 
904 	input_sync(wdata->extension.input);
905 }
906 
907 static int wiimod_nunchuk_open(struct input_dev *dev)
908 {
909 	struct wiimote_data *wdata = input_get_drvdata(dev);
910 	unsigned long flags;
911 
912 	spin_lock_irqsave(&wdata->state.lock, flags);
913 	wdata->state.flags |= WIIPROTO_FLAG_EXT_USED;
914 	wiiproto_req_drm(wdata, WIIPROTO_REQ_NULL);
915 	spin_unlock_irqrestore(&wdata->state.lock, flags);
916 
917 	return 0;
918 }
919 
920 static void wiimod_nunchuk_close(struct input_dev *dev)
921 {
922 	struct wiimote_data *wdata = input_get_drvdata(dev);
923 	unsigned long flags;
924 
925 	spin_lock_irqsave(&wdata->state.lock, flags);
926 	wdata->state.flags &= ~WIIPROTO_FLAG_EXT_USED;
927 	wiiproto_req_drm(wdata, WIIPROTO_REQ_NULL);
928 	spin_unlock_irqrestore(&wdata->state.lock, flags);
929 }
930 
931 static int wiimod_nunchuk_probe(const struct wiimod_ops *ops,
932 				struct wiimote_data *wdata)
933 {
934 	int ret, i;
935 
936 	wdata->extension.input = input_allocate_device();
937 	if (!wdata->extension.input)
938 		return -ENOMEM;
939 
940 	input_set_drvdata(wdata->extension.input, wdata);
941 	wdata->extension.input->open = wiimod_nunchuk_open;
942 	wdata->extension.input->close = wiimod_nunchuk_close;
943 	wdata->extension.input->dev.parent = &wdata->hdev->dev;
944 	wdata->extension.input->id.bustype = wdata->hdev->bus;
945 	wdata->extension.input->id.vendor = wdata->hdev->vendor;
946 	wdata->extension.input->id.product = wdata->hdev->product;
947 	wdata->extension.input->id.version = wdata->hdev->version;
948 	wdata->extension.input->name = WIIMOTE_NAME " Nunchuk";
949 
950 	set_bit(EV_KEY, wdata->extension.input->evbit);
951 	for (i = 0; i < WIIMOD_NUNCHUK_KEY_NUM; ++i)
952 		set_bit(wiimod_nunchuk_map[i],
953 			wdata->extension.input->keybit);
954 
955 	set_bit(EV_ABS, wdata->extension.input->evbit);
956 	set_bit(ABS_HAT0X, wdata->extension.input->absbit);
957 	set_bit(ABS_HAT0Y, wdata->extension.input->absbit);
958 	input_set_abs_params(wdata->extension.input,
959 			     ABS_HAT0X, -120, 120, 2, 4);
960 	input_set_abs_params(wdata->extension.input,
961 			     ABS_HAT0Y, -120, 120, 2, 4);
962 	set_bit(ABS_RX, wdata->extension.input->absbit);
963 	set_bit(ABS_RY, wdata->extension.input->absbit);
964 	set_bit(ABS_RZ, wdata->extension.input->absbit);
965 	input_set_abs_params(wdata->extension.input,
966 			     ABS_RX, -500, 500, 2, 4);
967 	input_set_abs_params(wdata->extension.input,
968 			     ABS_RY, -500, 500, 2, 4);
969 	input_set_abs_params(wdata->extension.input,
970 			     ABS_RZ, -500, 500, 2, 4);
971 
972 	ret = input_register_device(wdata->extension.input);
973 	if (ret)
974 		goto err_free;
975 
976 	return 0;
977 
978 err_free:
979 	input_free_device(wdata->extension.input);
980 	wdata->extension.input = NULL;
981 	return ret;
982 }
983 
984 static void wiimod_nunchuk_remove(const struct wiimod_ops *ops,
985 				  struct wiimote_data *wdata)
986 {
987 	if (!wdata->extension.input)
988 		return;
989 
990 	input_unregister_device(wdata->extension.input);
991 	wdata->extension.input = NULL;
992 }
993 
994 static const struct wiimod_ops wiimod_nunchuk = {
995 	.flags = 0,
996 	.arg = 0,
997 	.probe = wiimod_nunchuk_probe,
998 	.remove = wiimod_nunchuk_remove,
999 	.in_ext = wiimod_nunchuk_in_ext,
1000 };
1001 
1002 /*
1003  * Classic Controller
1004  * Another official extension from Nintendo. It provides a classic
1005  * gamecube-like controller that can be hotplugged on the Wii Remote.
1006  * It has several hardware buttons and switches that are all reported via
1007  * a normal extension device.
1008  */
1009 
1010 enum wiimod_classic_keys {
1011 	WIIMOD_CLASSIC_KEY_A,
1012 	WIIMOD_CLASSIC_KEY_B,
1013 	WIIMOD_CLASSIC_KEY_X,
1014 	WIIMOD_CLASSIC_KEY_Y,
1015 	WIIMOD_CLASSIC_KEY_ZL,
1016 	WIIMOD_CLASSIC_KEY_ZR,
1017 	WIIMOD_CLASSIC_KEY_PLUS,
1018 	WIIMOD_CLASSIC_KEY_MINUS,
1019 	WIIMOD_CLASSIC_KEY_HOME,
1020 	WIIMOD_CLASSIC_KEY_LEFT,
1021 	WIIMOD_CLASSIC_KEY_RIGHT,
1022 	WIIMOD_CLASSIC_KEY_UP,
1023 	WIIMOD_CLASSIC_KEY_DOWN,
1024 	WIIMOD_CLASSIC_KEY_LT,
1025 	WIIMOD_CLASSIC_KEY_RT,
1026 	WIIMOD_CLASSIC_KEY_NUM,
1027 };
1028 
1029 static const __u16 wiimod_classic_map[] = {
1030 	BTN_A,		/* WIIMOD_CLASSIC_KEY_A */
1031 	BTN_B,		/* WIIMOD_CLASSIC_KEY_B */
1032 	BTN_X,		/* WIIMOD_CLASSIC_KEY_X */
1033 	BTN_Y,		/* WIIMOD_CLASSIC_KEY_Y */
1034 	BTN_TL2,	/* WIIMOD_CLASSIC_KEY_ZL */
1035 	BTN_TR2,	/* WIIMOD_CLASSIC_KEY_ZR */
1036 	KEY_NEXT,	/* WIIMOD_CLASSIC_KEY_PLUS */
1037 	KEY_PREVIOUS,	/* WIIMOD_CLASSIC_KEY_MINUS */
1038 	BTN_MODE,	/* WIIMOD_CLASSIC_KEY_HOME */
1039 	KEY_LEFT,	/* WIIMOD_CLASSIC_KEY_LEFT */
1040 	KEY_RIGHT,	/* WIIMOD_CLASSIC_KEY_RIGHT */
1041 	KEY_UP,		/* WIIMOD_CLASSIC_KEY_UP */
1042 	KEY_DOWN,	/* WIIMOD_CLASSIC_KEY_DOWN */
1043 	BTN_TL,		/* WIIMOD_CLASSIC_KEY_LT */
1044 	BTN_TR,		/* WIIMOD_CLASSIC_KEY_RT */
1045 };
1046 
1047 static void wiimod_classic_in_ext(struct wiimote_data *wdata, const __u8 *ext)
1048 {
1049 	__s8 rx, ry, lx, ly, lt, rt;
1050 
1051 	/*   Byte |  8  |  7  |  6  |  5  |  4  |  3  |  2  |  1  |
1052 	 *   -----+-----+-----+-----+-----+-----+-----+-----+-----+
1053 	 *    1   | RX <5:4>  |              LX <5:0>             |
1054 	 *    2   | RX <3:2>  |              LY <5:0>             |
1055 	 *   -----+-----+-----+-----+-----------------------------+
1056 	 *    3   |RX<1>| LT <5:4>  |         RY <5:1>            |
1057 	 *   -----+-----+-----------+-----------------------------+
1058 	 *    4   |     LT <3:1>    |         RT <5:1>            |
1059 	 *   -----+-----+-----+-----+-----+-----+-----+-----+-----+
1060 	 *    5   | BDR | BDD | BLT | B-  | BH  | B+  | BRT |  1  |
1061 	 *   -----+-----+-----+-----+-----+-----+-----+-----+-----+
1062 	 *    6   | BZL | BB  | BY  | BA  | BX  | BZR | BDL | BDU |
1063 	 *   -----+-----+-----+-----+-----+-----+-----+-----+-----+
1064 	 * All buttons are 0 if pressed
1065 	 * RX and RY are right analog stick
1066 	 * LX and LY are left analog stick
1067 	 * LT is left trigger, RT is right trigger
1068 	 * BLT is 0 if left trigger is fully pressed
1069 	 * BRT is 0 if right trigger is fully pressed
1070 	 * BDR, BDD, BDL, BDU form the D-Pad with right, down, left, up buttons
1071 	 * BZL is left Z button and BZR is right Z button
1072 	 * B-, BH, B+ are +, HOME and - buttons
1073 	 * BB, BY, BA, BX are A, B, X, Y buttons
1074 	 * LSB of RX, RY, LT, and RT are not transmitted and always 0.
1075 	 *
1076 	 * With motionp enabled it changes slightly to this:
1077 	 *   Byte |  8  |  7  |  6  |  5  |  4  |  3  |  2  |  1  |
1078 	 *   -----+-----+-----+-----+-----+-----+-----+-----+-----+
1079 	 *    1   | RX <5:4>  |          LX <5:1>           | BDU |
1080 	 *    2   | RX <3:2>  |          LY <5:1>           | BDL |
1081 	 *   -----+-----+-----+-----+-----------------------+-----+
1082 	 *    3   |RX<1>| LT <5:4>  |         RY <5:1>            |
1083 	 *   -----+-----+-----------+-----------------------------+
1084 	 *    4   |     LT <3:1>    |         RT <5:1>            |
1085 	 *   -----+-----+-----+-----+-----+-----+-----+-----+-----+
1086 	 *    5   | BDR | BDD | BLT | B-  | BH  | B+  | BRT | EXT |
1087 	 *   -----+-----+-----+-----+-----+-----+-----+-----+-----+
1088 	 *    6   | BZL | BB  | BY  | BA  | BX  | BZR |  0  |  0  |
1089 	 *   -----+-----+-----+-----+-----+-----+-----+-----+-----+
1090 	 * Only the LSBs of LX and LY are lost. BDU and BDL are moved, the rest
1091 	 * is the same as before.
1092 	 */
1093 
1094 	if (wdata->state.flags & WIIPROTO_FLAG_MP_ACTIVE) {
1095 		lx = ext[0] & 0x3e;
1096 		ly = ext[1] & 0x3e;
1097 	} else {
1098 		lx = ext[0] & 0x3f;
1099 		ly = ext[1] & 0x3f;
1100 	}
1101 
1102 	rx = (ext[0] >> 3) & 0x18;
1103 	rx |= (ext[1] >> 5) & 0x06;
1104 	rx |= (ext[2] >> 7) & 0x01;
1105 	ry = ext[2] & 0x1f;
1106 
1107 	rt = ext[3] & 0x1f;
1108 	lt = (ext[2] >> 2) & 0x18;
1109 	lt |= (ext[3] >> 5) & 0x07;
1110 
1111 	rx <<= 1;
1112 	ry <<= 1;
1113 	rt <<= 1;
1114 	lt <<= 1;
1115 
1116 	input_report_abs(wdata->extension.input, ABS_HAT1X, lx - 0x20);
1117 	input_report_abs(wdata->extension.input, ABS_HAT1Y, ly - 0x20);
1118 	input_report_abs(wdata->extension.input, ABS_HAT2X, rx - 0x20);
1119 	input_report_abs(wdata->extension.input, ABS_HAT2Y, ry - 0x20);
1120 	input_report_abs(wdata->extension.input, ABS_HAT3X, rt);
1121 	input_report_abs(wdata->extension.input, ABS_HAT3Y, lt);
1122 
1123 	input_report_key(wdata->extension.input,
1124 			 wiimod_classic_map[WIIMOD_CLASSIC_KEY_RIGHT],
1125 			 !(ext[4] & 0x80));
1126 	input_report_key(wdata->extension.input,
1127 			 wiimod_classic_map[WIIMOD_CLASSIC_KEY_DOWN],
1128 			 !(ext[4] & 0x40));
1129 	input_report_key(wdata->extension.input,
1130 			 wiimod_classic_map[WIIMOD_CLASSIC_KEY_LT],
1131 			 !(ext[4] & 0x20));
1132 	input_report_key(wdata->extension.input,
1133 			 wiimod_classic_map[WIIMOD_CLASSIC_KEY_MINUS],
1134 			 !(ext[4] & 0x10));
1135 	input_report_key(wdata->extension.input,
1136 			 wiimod_classic_map[WIIMOD_CLASSIC_KEY_HOME],
1137 			 !(ext[4] & 0x08));
1138 	input_report_key(wdata->extension.input,
1139 			 wiimod_classic_map[WIIMOD_CLASSIC_KEY_PLUS],
1140 			 !(ext[4] & 0x04));
1141 	input_report_key(wdata->extension.input,
1142 			 wiimod_classic_map[WIIMOD_CLASSIC_KEY_RT],
1143 			 !(ext[4] & 0x02));
1144 	input_report_key(wdata->extension.input,
1145 			 wiimod_classic_map[WIIMOD_CLASSIC_KEY_ZL],
1146 			 !(ext[5] & 0x80));
1147 	input_report_key(wdata->extension.input,
1148 			 wiimod_classic_map[WIIMOD_CLASSIC_KEY_B],
1149 			 !(ext[5] & 0x40));
1150 	input_report_key(wdata->extension.input,
1151 			 wiimod_classic_map[WIIMOD_CLASSIC_KEY_Y],
1152 			 !(ext[5] & 0x20));
1153 	input_report_key(wdata->extension.input,
1154 			 wiimod_classic_map[WIIMOD_CLASSIC_KEY_A],
1155 			 !(ext[5] & 0x10));
1156 	input_report_key(wdata->extension.input,
1157 			 wiimod_classic_map[WIIMOD_CLASSIC_KEY_X],
1158 			 !(ext[5] & 0x08));
1159 	input_report_key(wdata->extension.input,
1160 			 wiimod_classic_map[WIIMOD_CLASSIC_KEY_ZR],
1161 			 !(ext[5] & 0x04));
1162 
1163 	if (wdata->state.flags & WIIPROTO_FLAG_MP_ACTIVE) {
1164 		input_report_key(wdata->extension.input,
1165 			 wiimod_classic_map[WIIMOD_CLASSIC_KEY_LEFT],
1166 			 !(ext[1] & 0x01));
1167 		input_report_key(wdata->extension.input,
1168 			 wiimod_classic_map[WIIMOD_CLASSIC_KEY_UP],
1169 			 !(ext[0] & 0x01));
1170 	} else {
1171 		input_report_key(wdata->extension.input,
1172 			 wiimod_classic_map[WIIMOD_CLASSIC_KEY_LEFT],
1173 			 !(ext[5] & 0x02));
1174 		input_report_key(wdata->extension.input,
1175 			 wiimod_classic_map[WIIMOD_CLASSIC_KEY_UP],
1176 			 !(ext[5] & 0x01));
1177 	}
1178 
1179 	input_sync(wdata->extension.input);
1180 }
1181 
1182 static int wiimod_classic_open(struct input_dev *dev)
1183 {
1184 	struct wiimote_data *wdata = input_get_drvdata(dev);
1185 	unsigned long flags;
1186 
1187 	spin_lock_irqsave(&wdata->state.lock, flags);
1188 	wdata->state.flags |= WIIPROTO_FLAG_EXT_USED;
1189 	wiiproto_req_drm(wdata, WIIPROTO_REQ_NULL);
1190 	spin_unlock_irqrestore(&wdata->state.lock, flags);
1191 
1192 	return 0;
1193 }
1194 
1195 static void wiimod_classic_close(struct input_dev *dev)
1196 {
1197 	struct wiimote_data *wdata = input_get_drvdata(dev);
1198 	unsigned long flags;
1199 
1200 	spin_lock_irqsave(&wdata->state.lock, flags);
1201 	wdata->state.flags &= ~WIIPROTO_FLAG_EXT_USED;
1202 	wiiproto_req_drm(wdata, WIIPROTO_REQ_NULL);
1203 	spin_unlock_irqrestore(&wdata->state.lock, flags);
1204 }
1205 
1206 static int wiimod_classic_probe(const struct wiimod_ops *ops,
1207 				struct wiimote_data *wdata)
1208 {
1209 	int ret, i;
1210 
1211 	wdata->extension.input = input_allocate_device();
1212 	if (!wdata->extension.input)
1213 		return -ENOMEM;
1214 
1215 	input_set_drvdata(wdata->extension.input, wdata);
1216 	wdata->extension.input->open = wiimod_classic_open;
1217 	wdata->extension.input->close = wiimod_classic_close;
1218 	wdata->extension.input->dev.parent = &wdata->hdev->dev;
1219 	wdata->extension.input->id.bustype = wdata->hdev->bus;
1220 	wdata->extension.input->id.vendor = wdata->hdev->vendor;
1221 	wdata->extension.input->id.product = wdata->hdev->product;
1222 	wdata->extension.input->id.version = wdata->hdev->version;
1223 	wdata->extension.input->name = WIIMOTE_NAME " Classic Controller";
1224 
1225 	set_bit(EV_KEY, wdata->extension.input->evbit);
1226 	for (i = 0; i < WIIMOD_CLASSIC_KEY_NUM; ++i)
1227 		set_bit(wiimod_classic_map[i],
1228 			wdata->extension.input->keybit);
1229 
1230 	set_bit(EV_ABS, wdata->extension.input->evbit);
1231 	set_bit(ABS_HAT1X, wdata->extension.input->absbit);
1232 	set_bit(ABS_HAT1Y, wdata->extension.input->absbit);
1233 	set_bit(ABS_HAT2X, wdata->extension.input->absbit);
1234 	set_bit(ABS_HAT2Y, wdata->extension.input->absbit);
1235 	set_bit(ABS_HAT3X, wdata->extension.input->absbit);
1236 	set_bit(ABS_HAT3Y, wdata->extension.input->absbit);
1237 	input_set_abs_params(wdata->extension.input,
1238 			     ABS_HAT1X, -30, 30, 1, 1);
1239 	input_set_abs_params(wdata->extension.input,
1240 			     ABS_HAT1Y, -30, 30, 1, 1);
1241 	input_set_abs_params(wdata->extension.input,
1242 			     ABS_HAT2X, -30, 30, 1, 1);
1243 	input_set_abs_params(wdata->extension.input,
1244 			     ABS_HAT2Y, -30, 30, 1, 1);
1245 	input_set_abs_params(wdata->extension.input,
1246 			     ABS_HAT3X, -30, 30, 1, 1);
1247 	input_set_abs_params(wdata->extension.input,
1248 			     ABS_HAT3Y, -30, 30, 1, 1);
1249 
1250 	ret = input_register_device(wdata->extension.input);
1251 	if (ret)
1252 		goto err_free;
1253 
1254 	return 0;
1255 
1256 err_free:
1257 	input_free_device(wdata->extension.input);
1258 	wdata->extension.input = NULL;
1259 	return ret;
1260 }
1261 
1262 static void wiimod_classic_remove(const struct wiimod_ops *ops,
1263 				  struct wiimote_data *wdata)
1264 {
1265 	if (!wdata->extension.input)
1266 		return;
1267 
1268 	input_unregister_device(wdata->extension.input);
1269 	wdata->extension.input = NULL;
1270 }
1271 
1272 static const struct wiimod_ops wiimod_classic = {
1273 	.flags = 0,
1274 	.arg = 0,
1275 	.probe = wiimod_classic_probe,
1276 	.remove = wiimod_classic_remove,
1277 	.in_ext = wiimod_classic_in_ext,
1278 };
1279 
1280 /*
1281  * Balance Board Extension
1282  * The Nintendo Wii Balance Board provides four hardware weight sensor plus a
1283  * single push button. No other peripherals are available. However, the
1284  * balance-board data is sent via a standard Wii Remote extension. All other
1285  * data for non-present hardware is zeroed out.
1286  * Some 3rd party devices react allergic if we try to access normal Wii Remote
1287  * hardware, so this extension module should be the only module that is loaded
1288  * on balance boards.
1289  * The balance board needs 8 bytes extension data instead of basic 6 bytes so
1290  * it needs the WIIMOD_FLAG_EXT8 flag.
1291  */
1292 
1293 static void wiimod_bboard_in_keys(struct wiimote_data *wdata, const __u8 *keys)
1294 {
1295 	input_report_key(wdata->extension.input, BTN_A,
1296 			 !!(keys[1] & 0x08));
1297 	input_sync(wdata->extension.input);
1298 }
1299 
1300 static void wiimod_bboard_in_ext(struct wiimote_data *wdata,
1301 				 const __u8 *ext)
1302 {
1303 	__s32 val[4], tmp, div;
1304 	unsigned int i;
1305 	struct wiimote_state *s = &wdata->state;
1306 
1307 	/*
1308 	 * Balance board data layout:
1309 	 *
1310 	 *   Byte |  8  7  6  5  4  3  2  1  |
1311 	 *   -----+--------------------------+
1312 	 *    1   |    Top Right <15:8>      |
1313 	 *    2   |    Top Right  <7:0>      |
1314 	 *   -----+--------------------------+
1315 	 *    3   | Bottom Right <15:8>      |
1316 	 *    4   | Bottom Right  <7:0>      |
1317 	 *   -----+--------------------------+
1318 	 *    5   |     Top Left <15:8>      |
1319 	 *    6   |     Top Left  <7:0>      |
1320 	 *   -----+--------------------------+
1321 	 *    7   |  Bottom Left <15:8>      |
1322 	 *    8   |  Bottom Left  <7:0>      |
1323 	 *   -----+--------------------------+
1324 	 *
1325 	 * These values represent the weight-measurements of the Wii-balance
1326 	 * board with 16bit precision.
1327 	 *
1328 	 * The balance-board is never reported interleaved with motionp.
1329 	 */
1330 
1331 	val[0] = ext[0];
1332 	val[0] <<= 8;
1333 	val[0] |= ext[1];
1334 
1335 	val[1] = ext[2];
1336 	val[1] <<= 8;
1337 	val[1] |= ext[3];
1338 
1339 	val[2] = ext[4];
1340 	val[2] <<= 8;
1341 	val[2] |= ext[5];
1342 
1343 	val[3] = ext[6];
1344 	val[3] <<= 8;
1345 	val[3] |= ext[7];
1346 
1347 	/* apply calibration data */
1348 	for (i = 0; i < 4; i++) {
1349 		if (val[i] <= s->calib_bboard[i][0]) {
1350 			tmp = 0;
1351 		} else if (val[i] < s->calib_bboard[i][1]) {
1352 			tmp = val[i] - s->calib_bboard[i][0];
1353 			tmp *= 1700;
1354 			div = s->calib_bboard[i][1] - s->calib_bboard[i][0];
1355 			tmp /= div ? div : 1;
1356 		} else {
1357 			tmp = val[i] - s->calib_bboard[i][1];
1358 			tmp *= 1700;
1359 			div = s->calib_bboard[i][2] - s->calib_bboard[i][1];
1360 			tmp /= div ? div : 1;
1361 			tmp += 1700;
1362 		}
1363 		val[i] = tmp;
1364 	}
1365 
1366 	input_report_abs(wdata->extension.input, ABS_HAT0X, val[0]);
1367 	input_report_abs(wdata->extension.input, ABS_HAT0Y, val[1]);
1368 	input_report_abs(wdata->extension.input, ABS_HAT1X, val[2]);
1369 	input_report_abs(wdata->extension.input, ABS_HAT1Y, val[3]);
1370 	input_sync(wdata->extension.input);
1371 }
1372 
1373 static int wiimod_bboard_open(struct input_dev *dev)
1374 {
1375 	struct wiimote_data *wdata = input_get_drvdata(dev);
1376 	unsigned long flags;
1377 
1378 	spin_lock_irqsave(&wdata->state.lock, flags);
1379 	wdata->state.flags |= WIIPROTO_FLAG_EXT_USED;
1380 	wiiproto_req_drm(wdata, WIIPROTO_REQ_NULL);
1381 	spin_unlock_irqrestore(&wdata->state.lock, flags);
1382 
1383 	return 0;
1384 }
1385 
1386 static void wiimod_bboard_close(struct input_dev *dev)
1387 {
1388 	struct wiimote_data *wdata = input_get_drvdata(dev);
1389 	unsigned long flags;
1390 
1391 	spin_lock_irqsave(&wdata->state.lock, flags);
1392 	wdata->state.flags &= ~WIIPROTO_FLAG_EXT_USED;
1393 	wiiproto_req_drm(wdata, WIIPROTO_REQ_NULL);
1394 	spin_unlock_irqrestore(&wdata->state.lock, flags);
1395 }
1396 
1397 static ssize_t wiimod_bboard_calib_show(struct device *dev,
1398 					struct device_attribute *attr,
1399 					char *out)
1400 {
1401 	struct wiimote_data *wdata = dev_to_wii(dev);
1402 	int i, j, ret;
1403 	__u16 val;
1404 	__u8 buf[24], offs;
1405 
1406 	ret = wiimote_cmd_acquire(wdata);
1407 	if (ret)
1408 		return ret;
1409 
1410 	ret = wiimote_cmd_read(wdata, 0xa40024, buf, 12);
1411 	if (ret != 12) {
1412 		wiimote_cmd_release(wdata);
1413 		return ret < 0 ? ret : -EIO;
1414 	}
1415 	ret = wiimote_cmd_read(wdata, 0xa40024 + 12, buf + 12, 12);
1416 	if (ret != 12) {
1417 		wiimote_cmd_release(wdata);
1418 		return ret < 0 ? ret : -EIO;
1419 	}
1420 
1421 	wiimote_cmd_release(wdata);
1422 
1423 	spin_lock_irq(&wdata->state.lock);
1424 	offs = 0;
1425 	for (i = 0; i < 3; ++i) {
1426 		for (j = 0; j < 4; ++j) {
1427 			wdata->state.calib_bboard[j][i] = buf[offs];
1428 			wdata->state.calib_bboard[j][i] <<= 8;
1429 			wdata->state.calib_bboard[j][i] |= buf[offs + 1];
1430 			offs += 2;
1431 		}
1432 	}
1433 	spin_unlock_irq(&wdata->state.lock);
1434 
1435 	ret = 0;
1436 	for (i = 0; i < 3; ++i) {
1437 		for (j = 0; j < 4; ++j) {
1438 			val = wdata->state.calib_bboard[j][i];
1439 			if (i == 2 && j == 3)
1440 				ret += sprintf(&out[ret], "%04x\n", val);
1441 			else
1442 				ret += sprintf(&out[ret], "%04x:", val);
1443 		}
1444 	}
1445 
1446 	return ret;
1447 }
1448 
1449 static DEVICE_ATTR(bboard_calib, S_IRUGO, wiimod_bboard_calib_show, NULL);
1450 
1451 static int wiimod_bboard_probe(const struct wiimod_ops *ops,
1452 			       struct wiimote_data *wdata)
1453 {
1454 	int ret, i, j;
1455 	__u8 buf[24], offs;
1456 
1457 	wiimote_cmd_acquire_noint(wdata);
1458 
1459 	ret = wiimote_cmd_read(wdata, 0xa40024, buf, 12);
1460 	if (ret != 12) {
1461 		wiimote_cmd_release(wdata);
1462 		return ret < 0 ? ret : -EIO;
1463 	}
1464 	ret = wiimote_cmd_read(wdata, 0xa40024 + 12, buf + 12, 12);
1465 	if (ret != 12) {
1466 		wiimote_cmd_release(wdata);
1467 		return ret < 0 ? ret : -EIO;
1468 	}
1469 
1470 	wiimote_cmd_release(wdata);
1471 
1472 	offs = 0;
1473 	for (i = 0; i < 3; ++i) {
1474 		for (j = 0; j < 4; ++j) {
1475 			wdata->state.calib_bboard[j][i] = buf[offs];
1476 			wdata->state.calib_bboard[j][i] <<= 8;
1477 			wdata->state.calib_bboard[j][i] |= buf[offs + 1];
1478 			offs += 2;
1479 		}
1480 	}
1481 
1482 	wdata->extension.input = input_allocate_device();
1483 	if (!wdata->extension.input)
1484 		return -ENOMEM;
1485 
1486 	ret = device_create_file(&wdata->hdev->dev,
1487 				 &dev_attr_bboard_calib);
1488 	if (ret) {
1489 		hid_err(wdata->hdev, "cannot create sysfs attribute\n");
1490 		goto err_free;
1491 	}
1492 
1493 	input_set_drvdata(wdata->extension.input, wdata);
1494 	wdata->extension.input->open = wiimod_bboard_open;
1495 	wdata->extension.input->close = wiimod_bboard_close;
1496 	wdata->extension.input->dev.parent = &wdata->hdev->dev;
1497 	wdata->extension.input->id.bustype = wdata->hdev->bus;
1498 	wdata->extension.input->id.vendor = wdata->hdev->vendor;
1499 	wdata->extension.input->id.product = wdata->hdev->product;
1500 	wdata->extension.input->id.version = wdata->hdev->version;
1501 	wdata->extension.input->name = WIIMOTE_NAME " Balance Board";
1502 
1503 	set_bit(EV_KEY, wdata->extension.input->evbit);
1504 	set_bit(BTN_A, wdata->extension.input->keybit);
1505 
1506 	set_bit(EV_ABS, wdata->extension.input->evbit);
1507 	set_bit(ABS_HAT0X, wdata->extension.input->absbit);
1508 	set_bit(ABS_HAT0Y, wdata->extension.input->absbit);
1509 	set_bit(ABS_HAT1X, wdata->extension.input->absbit);
1510 	set_bit(ABS_HAT1Y, wdata->extension.input->absbit);
1511 	input_set_abs_params(wdata->extension.input,
1512 			     ABS_HAT0X, 0, 65535, 2, 4);
1513 	input_set_abs_params(wdata->extension.input,
1514 			     ABS_HAT0Y, 0, 65535, 2, 4);
1515 	input_set_abs_params(wdata->extension.input,
1516 			     ABS_HAT1X, 0, 65535, 2, 4);
1517 	input_set_abs_params(wdata->extension.input,
1518 			     ABS_HAT1Y, 0, 65535, 2, 4);
1519 
1520 	ret = input_register_device(wdata->extension.input);
1521 	if (ret)
1522 		goto err_file;
1523 
1524 	return 0;
1525 
1526 err_file:
1527 	device_remove_file(&wdata->hdev->dev,
1528 			   &dev_attr_bboard_calib);
1529 err_free:
1530 	input_free_device(wdata->extension.input);
1531 	wdata->extension.input = NULL;
1532 	return ret;
1533 }
1534 
1535 static void wiimod_bboard_remove(const struct wiimod_ops *ops,
1536 				 struct wiimote_data *wdata)
1537 {
1538 	if (!wdata->extension.input)
1539 		return;
1540 
1541 	input_unregister_device(wdata->extension.input);
1542 	wdata->extension.input = NULL;
1543 	device_remove_file(&wdata->hdev->dev,
1544 			   &dev_attr_bboard_calib);
1545 }
1546 
1547 static const struct wiimod_ops wiimod_bboard = {
1548 	.flags = WIIMOD_FLAG_EXT8,
1549 	.arg = 0,
1550 	.probe = wiimod_bboard_probe,
1551 	.remove = wiimod_bboard_remove,
1552 	.in_keys = wiimod_bboard_in_keys,
1553 	.in_ext = wiimod_bboard_in_ext,
1554 };
1555 
1556 /*
1557  * Pro Controller
1558  * Released with the Wii U was the Nintendo Wii U Pro Controller. It does not
1559  * work together with the classic Wii, but only with the new Wii U. However, it
1560  * uses the same protocol and provides a builtin "classic controller pro"
1561  * extension, few standard buttons, a rumble motor, 4 LEDs and a battery.
1562  * We provide all these via a standard extension device as the device doesn't
1563  * feature an extension port.
1564  */
1565 
1566 enum wiimod_pro_keys {
1567 	WIIMOD_PRO_KEY_A,
1568 	WIIMOD_PRO_KEY_B,
1569 	WIIMOD_PRO_KEY_X,
1570 	WIIMOD_PRO_KEY_Y,
1571 	WIIMOD_PRO_KEY_PLUS,
1572 	WIIMOD_PRO_KEY_MINUS,
1573 	WIIMOD_PRO_KEY_HOME,
1574 	WIIMOD_PRO_KEY_LEFT,
1575 	WIIMOD_PRO_KEY_RIGHT,
1576 	WIIMOD_PRO_KEY_UP,
1577 	WIIMOD_PRO_KEY_DOWN,
1578 	WIIMOD_PRO_KEY_TL,
1579 	WIIMOD_PRO_KEY_TR,
1580 	WIIMOD_PRO_KEY_ZL,
1581 	WIIMOD_PRO_KEY_ZR,
1582 	WIIMOD_PRO_KEY_THUMBL,
1583 	WIIMOD_PRO_KEY_THUMBR,
1584 	WIIMOD_PRO_KEY_NUM,
1585 };
1586 
1587 static const __u16 wiimod_pro_map[] = {
1588 	BTN_EAST,	/* WIIMOD_PRO_KEY_A */
1589 	BTN_SOUTH,	/* WIIMOD_PRO_KEY_B */
1590 	BTN_NORTH,	/* WIIMOD_PRO_KEY_X */
1591 	BTN_WEST,	/* WIIMOD_PRO_KEY_Y */
1592 	BTN_START,	/* WIIMOD_PRO_KEY_PLUS */
1593 	BTN_SELECT,	/* WIIMOD_PRO_KEY_MINUS */
1594 	BTN_MODE,	/* WIIMOD_PRO_KEY_HOME */
1595 	BTN_DPAD_LEFT,	/* WIIMOD_PRO_KEY_LEFT */
1596 	BTN_DPAD_RIGHT,	/* WIIMOD_PRO_KEY_RIGHT */
1597 	BTN_DPAD_UP,	/* WIIMOD_PRO_KEY_UP */
1598 	BTN_DPAD_DOWN,	/* WIIMOD_PRO_KEY_DOWN */
1599 	BTN_TL,		/* WIIMOD_PRO_KEY_TL */
1600 	BTN_TR,		/* WIIMOD_PRO_KEY_TR */
1601 	BTN_TL2,	/* WIIMOD_PRO_KEY_ZL */
1602 	BTN_TR2,	/* WIIMOD_PRO_KEY_ZR */
1603 	BTN_THUMBL,	/* WIIMOD_PRO_KEY_THUMBL */
1604 	BTN_THUMBR,	/* WIIMOD_PRO_KEY_THUMBR */
1605 };
1606 
1607 static void wiimod_pro_in_ext(struct wiimote_data *wdata, const __u8 *ext)
1608 {
1609 	__s16 rx, ry, lx, ly;
1610 
1611 	/*   Byte |  8  |  7  |  6  |  5  |  4  |  3  |  2  |  1  |
1612 	 *   -----+-----+-----+-----+-----+-----+-----+-----+-----+
1613 	 *    1   |                   LX <7:0>                    |
1614 	 *   -----+-----------------------+-----------------------+
1615 	 *    2   |  0     0     0     0  |       LX <11:8>       |
1616 	 *   -----+-----------------------+-----------------------+
1617 	 *    3   |                   RX <7:0>                    |
1618 	 *   -----+-----------------------+-----------------------+
1619 	 *    4   |  0     0     0     0  |       RX <11:8>       |
1620 	 *   -----+-----------------------+-----------------------+
1621 	 *    5   |                   LY <7:0>                    |
1622 	 *   -----+-----------------------+-----------------------+
1623 	 *    6   |  0     0     0     0  |       LY <11:8>       |
1624 	 *   -----+-----------------------+-----------------------+
1625 	 *    7   |                   RY <7:0>                    |
1626 	 *   -----+-----------------------+-----------------------+
1627 	 *    8   |  0     0     0     0  |       RY <11:8>       |
1628 	 *   -----+-----+-----+-----+-----+-----+-----+-----+-----+
1629 	 *    9   | BDR | BDD | BLT | B-  | BH  | B+  | BRT |  1  |
1630 	 *   -----+-----+-----+-----+-----+-----+-----+-----+-----+
1631 	 *   10   | BZL | BB  | BY  | BA  | BX  | BZR | BDL | BDU |
1632 	 *   -----+-----+-----+-----+-----+-----+-----+-----+-----+
1633 	 *   11   |  1  |     BATTERY     | USB |CHARG|LTHUM|RTHUM|
1634 	 *   -----+-----+-----------------+-----------+-----+-----+
1635 	 * All buttons are low-active (0 if pressed)
1636 	 * RX and RY are right analog stick
1637 	 * LX and LY are left analog stick
1638 	 * BLT is left trigger, BRT is right trigger.
1639 	 * BDR, BDD, BDL, BDU form the D-Pad with right, down, left, up buttons
1640 	 * BZL is left Z button and BZR is right Z button
1641 	 * B-, BH, B+ are +, HOME and - buttons
1642 	 * BB, BY, BA, BX are A, B, X, Y buttons
1643 	 *
1644 	 * Bits marked as 0/1 are unknown and never changed during tests.
1645 	 *
1646 	 * Not entirely verified:
1647 	 *   CHARG: 1 if uncharging, 0 if charging
1648 	 *   USB: 1 if not connected, 0 if connected
1649 	 *   BATTERY: battery capacity from 000 (empty) to 100 (full)
1650 	 */
1651 
1652 	lx = (ext[0] & 0xff) | ((ext[1] & 0x0f) << 8);
1653 	rx = (ext[2] & 0xff) | ((ext[3] & 0x0f) << 8);
1654 	ly = (ext[4] & 0xff) | ((ext[5] & 0x0f) << 8);
1655 	ry = (ext[6] & 0xff) | ((ext[7] & 0x0f) << 8);
1656 
1657 	/* zero-point offsets */
1658 	lx -= 0x800;
1659 	ly = 0x800 - ly;
1660 	rx -= 0x800;
1661 	ry = 0x800 - ry;
1662 
1663 	/* Trivial automatic calibration. We don't know any calibration data
1664 	 * in the EEPROM so we must use the first report to calibrate the
1665 	 * null-position of the analog sticks. Users can retrigger calibration
1666 	 * via sysfs, or set it explicitly. If data is off more than abs(500),
1667 	 * we skip calibration as the sticks are likely to be moved already. */
1668 	if (!(wdata->state.flags & WIIPROTO_FLAG_PRO_CALIB_DONE)) {
1669 		wdata->state.flags |= WIIPROTO_FLAG_PRO_CALIB_DONE;
1670 		if (abs(lx) < 500)
1671 			wdata->state.calib_pro_sticks[0] = -lx;
1672 		if (abs(ly) < 500)
1673 			wdata->state.calib_pro_sticks[1] = -ly;
1674 		if (abs(rx) < 500)
1675 			wdata->state.calib_pro_sticks[2] = -rx;
1676 		if (abs(ry) < 500)
1677 			wdata->state.calib_pro_sticks[3] = -ry;
1678 	}
1679 
1680 	/* apply calibration data */
1681 	lx += wdata->state.calib_pro_sticks[0];
1682 	ly += wdata->state.calib_pro_sticks[1];
1683 	rx += wdata->state.calib_pro_sticks[2];
1684 	ry += wdata->state.calib_pro_sticks[3];
1685 
1686 	input_report_abs(wdata->extension.input, ABS_X, lx);
1687 	input_report_abs(wdata->extension.input, ABS_Y, ly);
1688 	input_report_abs(wdata->extension.input, ABS_RX, rx);
1689 	input_report_abs(wdata->extension.input, ABS_RY, ry);
1690 
1691 	input_report_key(wdata->extension.input,
1692 			 wiimod_pro_map[WIIMOD_PRO_KEY_RIGHT],
1693 			 !(ext[8] & 0x80));
1694 	input_report_key(wdata->extension.input,
1695 			 wiimod_pro_map[WIIMOD_PRO_KEY_DOWN],
1696 			 !(ext[8] & 0x40));
1697 	input_report_key(wdata->extension.input,
1698 			 wiimod_pro_map[WIIMOD_PRO_KEY_TL],
1699 			 !(ext[8] & 0x20));
1700 	input_report_key(wdata->extension.input,
1701 			 wiimod_pro_map[WIIMOD_PRO_KEY_MINUS],
1702 			 !(ext[8] & 0x10));
1703 	input_report_key(wdata->extension.input,
1704 			 wiimod_pro_map[WIIMOD_PRO_KEY_HOME],
1705 			 !(ext[8] & 0x08));
1706 	input_report_key(wdata->extension.input,
1707 			 wiimod_pro_map[WIIMOD_PRO_KEY_PLUS],
1708 			 !(ext[8] & 0x04));
1709 	input_report_key(wdata->extension.input,
1710 			 wiimod_pro_map[WIIMOD_PRO_KEY_TR],
1711 			 !(ext[8] & 0x02));
1712 
1713 	input_report_key(wdata->extension.input,
1714 			 wiimod_pro_map[WIIMOD_PRO_KEY_ZL],
1715 			 !(ext[9] & 0x80));
1716 	input_report_key(wdata->extension.input,
1717 			 wiimod_pro_map[WIIMOD_PRO_KEY_B],
1718 			 !(ext[9] & 0x40));
1719 	input_report_key(wdata->extension.input,
1720 			 wiimod_pro_map[WIIMOD_PRO_KEY_Y],
1721 			 !(ext[9] & 0x20));
1722 	input_report_key(wdata->extension.input,
1723 			 wiimod_pro_map[WIIMOD_PRO_KEY_A],
1724 			 !(ext[9] & 0x10));
1725 	input_report_key(wdata->extension.input,
1726 			 wiimod_pro_map[WIIMOD_PRO_KEY_X],
1727 			 !(ext[9] & 0x08));
1728 	input_report_key(wdata->extension.input,
1729 			 wiimod_pro_map[WIIMOD_PRO_KEY_ZR],
1730 			 !(ext[9] & 0x04));
1731 	input_report_key(wdata->extension.input,
1732 			 wiimod_pro_map[WIIMOD_PRO_KEY_LEFT],
1733 			 !(ext[9] & 0x02));
1734 	input_report_key(wdata->extension.input,
1735 			 wiimod_pro_map[WIIMOD_PRO_KEY_UP],
1736 			 !(ext[9] & 0x01));
1737 
1738 	input_report_key(wdata->extension.input,
1739 			 wiimod_pro_map[WIIMOD_PRO_KEY_THUMBL],
1740 			 !(ext[10] & 0x02));
1741 	input_report_key(wdata->extension.input,
1742 			 wiimod_pro_map[WIIMOD_PRO_KEY_THUMBR],
1743 			 !(ext[10] & 0x01));
1744 
1745 	input_sync(wdata->extension.input);
1746 }
1747 
1748 static int wiimod_pro_open(struct input_dev *dev)
1749 {
1750 	struct wiimote_data *wdata = input_get_drvdata(dev);
1751 	unsigned long flags;
1752 
1753 	spin_lock_irqsave(&wdata->state.lock, flags);
1754 	wdata->state.flags |= WIIPROTO_FLAG_EXT_USED;
1755 	wiiproto_req_drm(wdata, WIIPROTO_REQ_NULL);
1756 	spin_unlock_irqrestore(&wdata->state.lock, flags);
1757 
1758 	return 0;
1759 }
1760 
1761 static void wiimod_pro_close(struct input_dev *dev)
1762 {
1763 	struct wiimote_data *wdata = input_get_drvdata(dev);
1764 	unsigned long flags;
1765 
1766 	spin_lock_irqsave(&wdata->state.lock, flags);
1767 	wdata->state.flags &= ~WIIPROTO_FLAG_EXT_USED;
1768 	wiiproto_req_drm(wdata, WIIPROTO_REQ_NULL);
1769 	spin_unlock_irqrestore(&wdata->state.lock, flags);
1770 }
1771 
1772 static int wiimod_pro_play(struct input_dev *dev, void *data,
1773 			   struct ff_effect *eff)
1774 {
1775 	struct wiimote_data *wdata = input_get_drvdata(dev);
1776 	__u8 value;
1777 
1778 	/*
1779 	 * The wiimote supports only a single rumble motor so if any magnitude
1780 	 * is set to non-zero then we start the rumble motor. If both are set to
1781 	 * zero, we stop the rumble motor.
1782 	 */
1783 
1784 	if (eff->u.rumble.strong_magnitude || eff->u.rumble.weak_magnitude)
1785 		value = 1;
1786 	else
1787 		value = 0;
1788 
1789 	/* Locking state.lock here might deadlock with input_event() calls.
1790 	 * schedule_work acts as barrier. Merging multiple changes is fine. */
1791 	wdata->state.cache_rumble = value;
1792 	schedule_work(&wdata->rumble_worker);
1793 
1794 	return 0;
1795 }
1796 
1797 static ssize_t wiimod_pro_calib_show(struct device *dev,
1798 				     struct device_attribute *attr,
1799 				     char *out)
1800 {
1801 	struct wiimote_data *wdata = dev_to_wii(dev);
1802 	int r;
1803 
1804 	r = 0;
1805 	r += sprintf(&out[r], "%+06hd:", wdata->state.calib_pro_sticks[0]);
1806 	r += sprintf(&out[r], "%+06hd ", wdata->state.calib_pro_sticks[1]);
1807 	r += sprintf(&out[r], "%+06hd:", wdata->state.calib_pro_sticks[2]);
1808 	r += sprintf(&out[r], "%+06hd\n", wdata->state.calib_pro_sticks[3]);
1809 
1810 	return r;
1811 }
1812 
1813 static ssize_t wiimod_pro_calib_store(struct device *dev,
1814 				      struct device_attribute *attr,
1815 				      const char *buf, size_t count)
1816 {
1817 	struct wiimote_data *wdata = dev_to_wii(dev);
1818 	int r;
1819 	s16 x1, y1, x2, y2;
1820 
1821 	if (!strncmp(buf, "scan\n", 5)) {
1822 		spin_lock_irq(&wdata->state.lock);
1823 		wdata->state.flags &= ~WIIPROTO_FLAG_PRO_CALIB_DONE;
1824 		spin_unlock_irq(&wdata->state.lock);
1825 	} else {
1826 		r = sscanf(buf, "%hd:%hd %hd:%hd", &x1, &y1, &x2, &y2);
1827 		if (r != 4)
1828 			return -EINVAL;
1829 
1830 		spin_lock_irq(&wdata->state.lock);
1831 		wdata->state.flags |= WIIPROTO_FLAG_PRO_CALIB_DONE;
1832 		spin_unlock_irq(&wdata->state.lock);
1833 
1834 		wdata->state.calib_pro_sticks[0] = x1;
1835 		wdata->state.calib_pro_sticks[1] = y1;
1836 		wdata->state.calib_pro_sticks[2] = x2;
1837 		wdata->state.calib_pro_sticks[3] = y2;
1838 	}
1839 
1840 	return strnlen(buf, PAGE_SIZE);
1841 }
1842 
1843 static DEVICE_ATTR(pro_calib, S_IRUGO|S_IWUSR|S_IWGRP, wiimod_pro_calib_show,
1844 		   wiimod_pro_calib_store);
1845 
1846 static int wiimod_pro_probe(const struct wiimod_ops *ops,
1847 			    struct wiimote_data *wdata)
1848 {
1849 	int ret, i;
1850 	unsigned long flags;
1851 
1852 	INIT_WORK(&wdata->rumble_worker, wiimod_rumble_worker);
1853 	wdata->state.calib_pro_sticks[0] = 0;
1854 	wdata->state.calib_pro_sticks[1] = 0;
1855 	wdata->state.calib_pro_sticks[2] = 0;
1856 	wdata->state.calib_pro_sticks[3] = 0;
1857 
1858 	spin_lock_irqsave(&wdata->state.lock, flags);
1859 	wdata->state.flags &= ~WIIPROTO_FLAG_PRO_CALIB_DONE;
1860 	spin_unlock_irqrestore(&wdata->state.lock, flags);
1861 
1862 	wdata->extension.input = input_allocate_device();
1863 	if (!wdata->extension.input)
1864 		return -ENOMEM;
1865 
1866 	set_bit(FF_RUMBLE, wdata->extension.input->ffbit);
1867 	input_set_drvdata(wdata->extension.input, wdata);
1868 
1869 	if (input_ff_create_memless(wdata->extension.input, NULL,
1870 				    wiimod_pro_play)) {
1871 		ret = -ENOMEM;
1872 		goto err_free;
1873 	}
1874 
1875 	ret = device_create_file(&wdata->hdev->dev,
1876 				 &dev_attr_pro_calib);
1877 	if (ret) {
1878 		hid_err(wdata->hdev, "cannot create sysfs attribute\n");
1879 		goto err_free;
1880 	}
1881 
1882 	wdata->extension.input->open = wiimod_pro_open;
1883 	wdata->extension.input->close = wiimod_pro_close;
1884 	wdata->extension.input->dev.parent = &wdata->hdev->dev;
1885 	wdata->extension.input->id.bustype = wdata->hdev->bus;
1886 	wdata->extension.input->id.vendor = wdata->hdev->vendor;
1887 	wdata->extension.input->id.product = wdata->hdev->product;
1888 	wdata->extension.input->id.version = wdata->hdev->version;
1889 	wdata->extension.input->name = WIIMOTE_NAME " Pro Controller";
1890 
1891 	set_bit(EV_KEY, wdata->extension.input->evbit);
1892 	for (i = 0; i < WIIMOD_PRO_KEY_NUM; ++i)
1893 		set_bit(wiimod_pro_map[i],
1894 			wdata->extension.input->keybit);
1895 
1896 	set_bit(EV_ABS, wdata->extension.input->evbit);
1897 	set_bit(ABS_X, wdata->extension.input->absbit);
1898 	set_bit(ABS_Y, wdata->extension.input->absbit);
1899 	set_bit(ABS_RX, wdata->extension.input->absbit);
1900 	set_bit(ABS_RY, wdata->extension.input->absbit);
1901 	input_set_abs_params(wdata->extension.input,
1902 			     ABS_X, -0x400, 0x400, 4, 100);
1903 	input_set_abs_params(wdata->extension.input,
1904 			     ABS_Y, -0x400, 0x400, 4, 100);
1905 	input_set_abs_params(wdata->extension.input,
1906 			     ABS_RX, -0x400, 0x400, 4, 100);
1907 	input_set_abs_params(wdata->extension.input,
1908 			     ABS_RY, -0x400, 0x400, 4, 100);
1909 
1910 	ret = input_register_device(wdata->extension.input);
1911 	if (ret)
1912 		goto err_file;
1913 
1914 	return 0;
1915 
1916 err_file:
1917 	device_remove_file(&wdata->hdev->dev,
1918 			   &dev_attr_pro_calib);
1919 err_free:
1920 	input_free_device(wdata->extension.input);
1921 	wdata->extension.input = NULL;
1922 	return ret;
1923 }
1924 
1925 static void wiimod_pro_remove(const struct wiimod_ops *ops,
1926 			      struct wiimote_data *wdata)
1927 {
1928 	unsigned long flags;
1929 
1930 	if (!wdata->extension.input)
1931 		return;
1932 
1933 	input_unregister_device(wdata->extension.input);
1934 	wdata->extension.input = NULL;
1935 	cancel_work_sync(&wdata->rumble_worker);
1936 	device_remove_file(&wdata->hdev->dev,
1937 			   &dev_attr_pro_calib);
1938 
1939 	spin_lock_irqsave(&wdata->state.lock, flags);
1940 	wiiproto_req_rumble(wdata, 0);
1941 	spin_unlock_irqrestore(&wdata->state.lock, flags);
1942 }
1943 
1944 static const struct wiimod_ops wiimod_pro = {
1945 	.flags = WIIMOD_FLAG_EXT16,
1946 	.arg = 0,
1947 	.probe = wiimod_pro_probe,
1948 	.remove = wiimod_pro_remove,
1949 	.in_ext = wiimod_pro_in_ext,
1950 };
1951 
1952 /*
1953  * Drums
1954  * Guitar-Hero, Rock-Band and other games came bundled with drums which can
1955  * be plugged as extension to a Wiimote. Drum-reports are still not entirely
1956  * figured out, but the most important information is known.
1957  * We create a separate device for drums and report all information via this
1958  * input device.
1959  */
1960 
1961 static inline void wiimod_drums_report_pressure(struct wiimote_data *wdata,
1962 						__u8 none, __u8 which,
1963 						__u8 pressure, __u8 onoff,
1964 						__u8 *store, __u16 code,
1965 						__u8 which_code)
1966 {
1967 	static const __u8 default_pressure = 3;
1968 
1969 	if (!none && which == which_code) {
1970 		*store = pressure;
1971 		input_report_abs(wdata->extension.input, code, *store);
1972 	} else if (onoff != !!*store) {
1973 		*store = onoff ? default_pressure : 0;
1974 		input_report_abs(wdata->extension.input, code, *store);
1975 	}
1976 }
1977 
1978 static void wiimod_drums_in_ext(struct wiimote_data *wdata, const __u8 *ext)
1979 {
1980 	__u8 pressure, which, none, hhp, sx, sy;
1981 	__u8 o, r, y, g, b, bass, bm, bp;
1982 
1983 	/*   Byte |  8  |  7  |  6  |  5  |  4  |  3  |  2  |  1  |
1984 	 *   -----+-----+-----+-----+-----+-----+-----+-----+-----+
1985 	 *    1   |  0  |  0  |              SX <5:0>             |
1986 	 *    2   |  0  |  0  |              SY <5:0>             |
1987 	 *   -----+-----+-----+-----------------------------+-----+
1988 	 *    3   | HPP | NON |         WHICH <5:1>         |  ?  |
1989 	 *   -----+-----+-----+-----+-----+-----+-----+-----+-----+
1990 	 *    4   |   SOFT <7:5>    |  0  |  1  |  1  |  0  |  ?  |
1991 	 *   -----+-----+-----+-----+-----+-----+-----+-----+-----+
1992 	 *    5   |  ?  |  1  |  1  | B-  |  1  | B+  |  1  |  ?  |
1993 	 *   -----+-----+-----+-----+-----+-----+-----+-----+-----+
1994 	 *    6   |  O  |  R  |  Y  |  G  |  B  | BSS |  1  |  1  |
1995 	 *   -----+-----+-----+-----+-----+-----+-----+-----+-----+
1996 	 * All buttons are 0 if pressed
1997 	 *
1998 	 * With Motion+ enabled, the following bits will get invalid:
1999 	 *   Byte |  8  |  7  |  6  |  5  |  4  |  3  |  2  |  1  |
2000 	 *   -----+-----+-----+-----+-----+-----+-----+-----+-----+
2001 	 *    1   |  0  |  0  |              SX <5:1>       |XXXXX|
2002 	 *    2   |  0  |  0  |              SY <5:1>       |XXXXX|
2003 	 *   -----+-----+-----+-----------------------------+-----+
2004 	 *    3   | HPP | NON |         WHICH <5:1>         |  ?  |
2005 	 *   -----+-----+-----+-----+-----+-----+-----+-----+-----+
2006 	 *    4   |   SOFT <7:5>    |  0  |  1  |  1  |  0  |  ?  |
2007 	 *   -----+-----+-----+-----+-----+-----+-----+-----+-----+
2008 	 *    5   |  ?  |  1  |  1  | B-  |  1  | B+  |  1  |XXXXX|
2009 	 *   -----+-----+-----+-----+-----+-----+-----+-----+-----+
2010 	 *    6   |  O  |  R  |  Y  |  G  |  B  | BSS |XXXXX|XXXXX|
2011 	 *   -----+-----+-----+-----+-----+-----+-----+-----+-----+
2012 	 */
2013 
2014 	pressure = 7 - (ext[3] >> 5);
2015 	which = (ext[2] >> 1) & 0x1f;
2016 	none = !!(ext[2] & 0x40);
2017 	hhp = !(ext[2] & 0x80);
2018 	sx = ext[0] & 0x3f;
2019 	sy = ext[1] & 0x3f;
2020 	o = !(ext[5] & 0x80);
2021 	r = !(ext[5] & 0x40);
2022 	y = !(ext[5] & 0x20);
2023 	g = !(ext[5] & 0x10);
2024 	b = !(ext[5] & 0x08);
2025 	bass = !(ext[5] & 0x04);
2026 	bm = !(ext[4] & 0x10);
2027 	bp = !(ext[4] & 0x04);
2028 
2029 	if (wdata->state.flags & WIIPROTO_FLAG_MP_ACTIVE) {
2030 		sx &= 0x3e;
2031 		sy &= 0x3e;
2032 	}
2033 
2034 	wiimod_drums_report_pressure(wdata, none, which, pressure,
2035 				     o, &wdata->state.pressure_drums[0],
2036 				     ABS_HAT2Y, 0x0e);
2037 	wiimod_drums_report_pressure(wdata, none, which, pressure,
2038 				     r, &wdata->state.pressure_drums[1],
2039 				     ABS_HAT0X, 0x19);
2040 	wiimod_drums_report_pressure(wdata, none, which, pressure,
2041 				     y, &wdata->state.pressure_drums[2],
2042 				     ABS_HAT2X, 0x11);
2043 	wiimod_drums_report_pressure(wdata, none, which, pressure,
2044 				     g, &wdata->state.pressure_drums[3],
2045 				     ABS_HAT1X, 0x12);
2046 	wiimod_drums_report_pressure(wdata, none, which, pressure,
2047 				     b, &wdata->state.pressure_drums[4],
2048 				     ABS_HAT0Y, 0x0f);
2049 
2050 	/* Bass shares pressure with hi-hat (set via hhp) */
2051 	wiimod_drums_report_pressure(wdata, none, hhp ? 0xff : which, pressure,
2052 				     bass, &wdata->state.pressure_drums[5],
2053 				     ABS_HAT3X, 0x1b);
2054 	/* Hi-hat has no on/off values, just pressure. Force to off/0. */
2055 	wiimod_drums_report_pressure(wdata, none, hhp ? which : 0xff, pressure,
2056 				     0, &wdata->state.pressure_drums[6],
2057 				     ABS_HAT3Y, 0x0e);
2058 
2059 	input_report_abs(wdata->extension.input, ABS_X, sx - 0x20);
2060 	input_report_abs(wdata->extension.input, ABS_Y, sy - 0x20);
2061 
2062 	input_report_key(wdata->extension.input, BTN_START, bp);
2063 	input_report_key(wdata->extension.input, BTN_SELECT, bm);
2064 
2065 	input_sync(wdata->extension.input);
2066 }
2067 
2068 static int wiimod_drums_open(struct input_dev *dev)
2069 {
2070 	struct wiimote_data *wdata = input_get_drvdata(dev);
2071 	unsigned long flags;
2072 
2073 	spin_lock_irqsave(&wdata->state.lock, flags);
2074 	wdata->state.flags |= WIIPROTO_FLAG_EXT_USED;
2075 	wiiproto_req_drm(wdata, WIIPROTO_REQ_NULL);
2076 	spin_unlock_irqrestore(&wdata->state.lock, flags);
2077 
2078 	return 0;
2079 }
2080 
2081 static void wiimod_drums_close(struct input_dev *dev)
2082 {
2083 	struct wiimote_data *wdata = input_get_drvdata(dev);
2084 	unsigned long flags;
2085 
2086 	spin_lock_irqsave(&wdata->state.lock, flags);
2087 	wdata->state.flags &= ~WIIPROTO_FLAG_EXT_USED;
2088 	wiiproto_req_drm(wdata, WIIPROTO_REQ_NULL);
2089 	spin_unlock_irqrestore(&wdata->state.lock, flags);
2090 }
2091 
2092 static int wiimod_drums_probe(const struct wiimod_ops *ops,
2093 			      struct wiimote_data *wdata)
2094 {
2095 	int ret;
2096 
2097 	wdata->extension.input = input_allocate_device();
2098 	if (!wdata->extension.input)
2099 		return -ENOMEM;
2100 
2101 	input_set_drvdata(wdata->extension.input, wdata);
2102 	wdata->extension.input->open = wiimod_drums_open;
2103 	wdata->extension.input->close = wiimod_drums_close;
2104 	wdata->extension.input->dev.parent = &wdata->hdev->dev;
2105 	wdata->extension.input->id.bustype = wdata->hdev->bus;
2106 	wdata->extension.input->id.vendor = wdata->hdev->vendor;
2107 	wdata->extension.input->id.product = wdata->hdev->product;
2108 	wdata->extension.input->id.version = wdata->hdev->version;
2109 	wdata->extension.input->name = WIIMOTE_NAME " Drums";
2110 
2111 	set_bit(EV_KEY, wdata->extension.input->evbit);
2112 	set_bit(BTN_START, wdata->extension.input->keybit);
2113 	set_bit(BTN_SELECT, wdata->extension.input->keybit);
2114 
2115 	set_bit(EV_ABS, wdata->extension.input->evbit);
2116 	set_bit(ABS_X, wdata->extension.input->absbit);
2117 	set_bit(ABS_Y, wdata->extension.input->absbit);
2118 	set_bit(ABS_HAT0X, wdata->extension.input->absbit);
2119 	set_bit(ABS_HAT0Y, wdata->extension.input->absbit);
2120 	set_bit(ABS_HAT1X, wdata->extension.input->absbit);
2121 	set_bit(ABS_HAT2X, wdata->extension.input->absbit);
2122 	set_bit(ABS_HAT2Y, wdata->extension.input->absbit);
2123 	set_bit(ABS_HAT3X, wdata->extension.input->absbit);
2124 	set_bit(ABS_HAT3Y, wdata->extension.input->absbit);
2125 	input_set_abs_params(wdata->extension.input,
2126 			     ABS_X, -32, 31, 1, 1);
2127 	input_set_abs_params(wdata->extension.input,
2128 			     ABS_Y, -32, 31, 1, 1);
2129 	input_set_abs_params(wdata->extension.input,
2130 			     ABS_HAT0X, 0, 7, 0, 0);
2131 	input_set_abs_params(wdata->extension.input,
2132 			     ABS_HAT0Y, 0, 7, 0, 0);
2133 	input_set_abs_params(wdata->extension.input,
2134 			     ABS_HAT1X, 0, 7, 0, 0);
2135 	input_set_abs_params(wdata->extension.input,
2136 			     ABS_HAT2X, 0, 7, 0, 0);
2137 	input_set_abs_params(wdata->extension.input,
2138 			     ABS_HAT2Y, 0, 7, 0, 0);
2139 	input_set_abs_params(wdata->extension.input,
2140 			     ABS_HAT3X, 0, 7, 0, 0);
2141 	input_set_abs_params(wdata->extension.input,
2142 			     ABS_HAT3Y, 0, 7, 0, 0);
2143 
2144 	ret = input_register_device(wdata->extension.input);
2145 	if (ret)
2146 		goto err_free;
2147 
2148 	return 0;
2149 
2150 err_free:
2151 	input_free_device(wdata->extension.input);
2152 	wdata->extension.input = NULL;
2153 	return ret;
2154 }
2155 
2156 static void wiimod_drums_remove(const struct wiimod_ops *ops,
2157 				struct wiimote_data *wdata)
2158 {
2159 	if (!wdata->extension.input)
2160 		return;
2161 
2162 	input_unregister_device(wdata->extension.input);
2163 	wdata->extension.input = NULL;
2164 }
2165 
2166 static const struct wiimod_ops wiimod_drums = {
2167 	.flags = 0,
2168 	.arg = 0,
2169 	.probe = wiimod_drums_probe,
2170 	.remove = wiimod_drums_remove,
2171 	.in_ext = wiimod_drums_in_ext,
2172 };
2173 
2174 /*
2175  * Guitar
2176  * Guitar-Hero, Rock-Band and other games came bundled with guitars which can
2177  * be plugged as extension to a Wiimote.
2178  * We create a separate device for guitars and report all information via this
2179  * input device.
2180  */
2181 
2182 enum wiimod_guitar_keys {
2183 	WIIMOD_GUITAR_KEY_G,
2184 	WIIMOD_GUITAR_KEY_R,
2185 	WIIMOD_GUITAR_KEY_Y,
2186 	WIIMOD_GUITAR_KEY_B,
2187 	WIIMOD_GUITAR_KEY_O,
2188 	WIIMOD_GUITAR_KEY_UP,
2189 	WIIMOD_GUITAR_KEY_DOWN,
2190 	WIIMOD_GUITAR_KEY_PLUS,
2191 	WIIMOD_GUITAR_KEY_MINUS,
2192 	WIIMOD_GUITAR_KEY_NUM,
2193 };
2194 
2195 static const __u16 wiimod_guitar_map[] = {
2196 	BTN_1,			/* WIIMOD_GUITAR_KEY_G */
2197 	BTN_2,			/* WIIMOD_GUITAR_KEY_R */
2198 	BTN_3,			/* WIIMOD_GUITAR_KEY_Y */
2199 	BTN_4,			/* WIIMOD_GUITAR_KEY_B */
2200 	BTN_5,			/* WIIMOD_GUITAR_KEY_O */
2201 	BTN_DPAD_UP,		/* WIIMOD_GUITAR_KEY_UP */
2202 	BTN_DPAD_DOWN,		/* WIIMOD_GUITAR_KEY_DOWN */
2203 	BTN_START,		/* WIIMOD_GUITAR_KEY_PLUS */
2204 	BTN_SELECT,		/* WIIMOD_GUITAR_KEY_MINUS */
2205 };
2206 
2207 static void wiimod_guitar_in_ext(struct wiimote_data *wdata, const __u8 *ext)
2208 {
2209 	__u8 sx, sy, tb, wb, bd, bm, bp, bo, br, bb, bg, by, bu;
2210 
2211 	/*   Byte |  8  |  7  |  6  |  5  |  4  |  3  |  2  |  1  |
2212 	 *   -----+-----+-----+-----+-----+-----+-----+-----+-----+
2213 	 *    1   |  0  |  0  |              SX <5:0>             |
2214 	 *    2   |  0  |  0  |              SY <5:0>             |
2215 	 *   -----+-----+-----+-----+-----------------------------+
2216 	 *    3   |  0  |  0  |  0  |      TB <4:0>               |
2217 	 *   -----+-----+-----+-----+-----------------------------+
2218 	 *    4   |  0  |  0  |  0  |      WB <4:0>               |
2219 	 *   -----+-----+-----+-----+-----+-----+-----+-----+-----+
2220 	 *    5   |  1  | BD  |  1  | B-  |  1  | B+  |  1  |  1  |
2221 	 *   -----+-----+-----+-----+-----+-----+-----+-----+-----+
2222 	 *    6   | BO  | BR  | BB  | BG  | BY  |  1  |  1  | BU  |
2223 	 *   -----+-----+-----+-----+-----+-----+-----+-----+-----+
2224 	 * All buttons are 0 if pressed
2225 	 *
2226 	 * With Motion+ enabled, it will look like this:
2227 	 *   Byte |  8  |  7  |  6  |  5  |  4  |  3  |  2  |  1  |
2228 	 *   -----+-----+-----+-----+-----+-----+-----+-----+-----+
2229 	 *    1   |  0  |  0  |              SX <5:1>       | BU  |
2230 	 *    2   |  0  |  0  |              SY <5:1>       |  1  |
2231 	 *   -----+-----+-----+-----+-----------------------+-----+
2232 	 *    3   |  0  |  0  |  0  |      TB <4:0>               |
2233 	 *   -----+-----+-----+-----+-----------------------------+
2234 	 *    4   |  0  |  0  |  0  |      WB <4:0>               |
2235 	 *   -----+-----+-----+-----+-----+-----+-----+-----+-----+
2236 	 *    5   |  1  | BD  |  1  | B-  |  1  | B+  |  1  |XXXXX|
2237 	 *   -----+-----+-----+-----+-----+-----+-----+-----+-----+
2238 	 *    6   | BO  | BR  | BB  | BG  | BY  |  1  |XXXXX|XXXXX|
2239 	 *   -----+-----+-----+-----+-----+-----+-----+-----+-----+
2240 	 */
2241 
2242 	sx = ext[0] & 0x3f;
2243 	sy = ext[1] & 0x3f;
2244 	tb = ext[2] & 0x1f;
2245 	wb = ext[3] & 0x1f;
2246 	bd = !(ext[4] & 0x40);
2247 	bm = !(ext[4] & 0x10);
2248 	bp = !(ext[4] & 0x04);
2249 	bo = !(ext[5] & 0x80);
2250 	br = !(ext[5] & 0x40);
2251 	bb = !(ext[5] & 0x20);
2252 	bg = !(ext[5] & 0x10);
2253 	by = !(ext[5] & 0x08);
2254 	bu = !(ext[5] & 0x01);
2255 
2256 	if (wdata->state.flags & WIIPROTO_FLAG_MP_ACTIVE) {
2257 		bu = !(ext[0] & 0x01);
2258 		sx &= 0x3e;
2259 		sy &= 0x3e;
2260 	}
2261 
2262 	input_report_abs(wdata->extension.input, ABS_X, sx - 0x20);
2263 	input_report_abs(wdata->extension.input, ABS_Y, sy - 0x20);
2264 	input_report_abs(wdata->extension.input, ABS_HAT0X, tb);
2265 	input_report_abs(wdata->extension.input, ABS_HAT1X, wb - 0x10);
2266 
2267 	input_report_key(wdata->extension.input,
2268 			 wiimod_guitar_map[WIIMOD_GUITAR_KEY_G],
2269 			 bg);
2270 	input_report_key(wdata->extension.input,
2271 			 wiimod_guitar_map[WIIMOD_GUITAR_KEY_R],
2272 			 br);
2273 	input_report_key(wdata->extension.input,
2274 			 wiimod_guitar_map[WIIMOD_GUITAR_KEY_Y],
2275 			 by);
2276 	input_report_key(wdata->extension.input,
2277 			 wiimod_guitar_map[WIIMOD_GUITAR_KEY_B],
2278 			 bb);
2279 	input_report_key(wdata->extension.input,
2280 			 wiimod_guitar_map[WIIMOD_GUITAR_KEY_O],
2281 			 bo);
2282 	input_report_key(wdata->extension.input,
2283 			 wiimod_guitar_map[WIIMOD_GUITAR_KEY_UP],
2284 			 bu);
2285 	input_report_key(wdata->extension.input,
2286 			 wiimod_guitar_map[WIIMOD_GUITAR_KEY_DOWN],
2287 			 bd);
2288 	input_report_key(wdata->extension.input,
2289 			 wiimod_guitar_map[WIIMOD_GUITAR_KEY_PLUS],
2290 			 bp);
2291 	input_report_key(wdata->extension.input,
2292 			 wiimod_guitar_map[WIIMOD_GUITAR_KEY_MINUS],
2293 			 bm);
2294 
2295 	input_sync(wdata->extension.input);
2296 }
2297 
2298 static int wiimod_guitar_open(struct input_dev *dev)
2299 {
2300 	struct wiimote_data *wdata = input_get_drvdata(dev);
2301 	unsigned long flags;
2302 
2303 	spin_lock_irqsave(&wdata->state.lock, flags);
2304 	wdata->state.flags |= WIIPROTO_FLAG_EXT_USED;
2305 	wiiproto_req_drm(wdata, WIIPROTO_REQ_NULL);
2306 	spin_unlock_irqrestore(&wdata->state.lock, flags);
2307 
2308 	return 0;
2309 }
2310 
2311 static void wiimod_guitar_close(struct input_dev *dev)
2312 {
2313 	struct wiimote_data *wdata = input_get_drvdata(dev);
2314 	unsigned long flags;
2315 
2316 	spin_lock_irqsave(&wdata->state.lock, flags);
2317 	wdata->state.flags &= ~WIIPROTO_FLAG_EXT_USED;
2318 	wiiproto_req_drm(wdata, WIIPROTO_REQ_NULL);
2319 	spin_unlock_irqrestore(&wdata->state.lock, flags);
2320 }
2321 
2322 static int wiimod_guitar_probe(const struct wiimod_ops *ops,
2323 			       struct wiimote_data *wdata)
2324 {
2325 	int ret, i;
2326 
2327 	wdata->extension.input = input_allocate_device();
2328 	if (!wdata->extension.input)
2329 		return -ENOMEM;
2330 
2331 	input_set_drvdata(wdata->extension.input, wdata);
2332 	wdata->extension.input->open = wiimod_guitar_open;
2333 	wdata->extension.input->close = wiimod_guitar_close;
2334 	wdata->extension.input->dev.parent = &wdata->hdev->dev;
2335 	wdata->extension.input->id.bustype = wdata->hdev->bus;
2336 	wdata->extension.input->id.vendor = wdata->hdev->vendor;
2337 	wdata->extension.input->id.product = wdata->hdev->product;
2338 	wdata->extension.input->id.version = wdata->hdev->version;
2339 	wdata->extension.input->name = WIIMOTE_NAME " Guitar";
2340 
2341 	set_bit(EV_KEY, wdata->extension.input->evbit);
2342 	for (i = 0; i < WIIMOD_GUITAR_KEY_NUM; ++i)
2343 		set_bit(wiimod_guitar_map[i],
2344 			wdata->extension.input->keybit);
2345 
2346 	set_bit(EV_ABS, wdata->extension.input->evbit);
2347 	set_bit(ABS_X, wdata->extension.input->absbit);
2348 	set_bit(ABS_Y, wdata->extension.input->absbit);
2349 	set_bit(ABS_HAT0X, wdata->extension.input->absbit);
2350 	set_bit(ABS_HAT1X, wdata->extension.input->absbit);
2351 	input_set_abs_params(wdata->extension.input,
2352 			     ABS_X, -32, 31, 1, 1);
2353 	input_set_abs_params(wdata->extension.input,
2354 			     ABS_Y, -32, 31, 1, 1);
2355 	input_set_abs_params(wdata->extension.input,
2356 			     ABS_HAT0X, 0, 0x1f, 1, 1);
2357 	input_set_abs_params(wdata->extension.input,
2358 			     ABS_HAT1X, 0, 0x0f, 1, 1);
2359 
2360 	ret = input_register_device(wdata->extension.input);
2361 	if (ret)
2362 		goto err_free;
2363 
2364 	return 0;
2365 
2366 err_free:
2367 	input_free_device(wdata->extension.input);
2368 	wdata->extension.input = NULL;
2369 	return ret;
2370 }
2371 
2372 static void wiimod_guitar_remove(const struct wiimod_ops *ops,
2373 				 struct wiimote_data *wdata)
2374 {
2375 	if (!wdata->extension.input)
2376 		return;
2377 
2378 	input_unregister_device(wdata->extension.input);
2379 	wdata->extension.input = NULL;
2380 }
2381 
2382 static const struct wiimod_ops wiimod_guitar = {
2383 	.flags = 0,
2384 	.arg = 0,
2385 	.probe = wiimod_guitar_probe,
2386 	.remove = wiimod_guitar_remove,
2387 	.in_ext = wiimod_guitar_in_ext,
2388 };
2389 
2390 /*
2391  * Builtin Motion Plus
2392  * This module simply sets the WIIPROTO_FLAG_BUILTIN_MP protocol flag which
2393  * disables polling for Motion-Plus. This should be set only for devices which
2394  * don't allow MP hotplugging.
2395  */
2396 
2397 static int wiimod_builtin_mp_probe(const struct wiimod_ops *ops,
2398 				   struct wiimote_data *wdata)
2399 {
2400 	unsigned long flags;
2401 
2402 	spin_lock_irqsave(&wdata->state.lock, flags);
2403 	wdata->state.flags |= WIIPROTO_FLAG_BUILTIN_MP;
2404 	spin_unlock_irqrestore(&wdata->state.lock, flags);
2405 
2406 	return 0;
2407 }
2408 
2409 static void wiimod_builtin_mp_remove(const struct wiimod_ops *ops,
2410 				     struct wiimote_data *wdata)
2411 {
2412 	unsigned long flags;
2413 
2414 	spin_lock_irqsave(&wdata->state.lock, flags);
2415 	wdata->state.flags |= WIIPROTO_FLAG_BUILTIN_MP;
2416 	spin_unlock_irqrestore(&wdata->state.lock, flags);
2417 }
2418 
2419 static const struct wiimod_ops wiimod_builtin_mp = {
2420 	.flags = 0,
2421 	.arg = 0,
2422 	.probe = wiimod_builtin_mp_probe,
2423 	.remove = wiimod_builtin_mp_remove,
2424 };
2425 
2426 /*
2427  * No Motion Plus
2428  * This module simply sets the WIIPROTO_FLAG_NO_MP protocol flag which
2429  * disables motion-plus. This is needed for devices that advertise this but we
2430  * don't know how to use it (or whether it is actually present).
2431  */
2432 
2433 static int wiimod_no_mp_probe(const struct wiimod_ops *ops,
2434 			      struct wiimote_data *wdata)
2435 {
2436 	unsigned long flags;
2437 
2438 	spin_lock_irqsave(&wdata->state.lock, flags);
2439 	wdata->state.flags |= WIIPROTO_FLAG_NO_MP;
2440 	spin_unlock_irqrestore(&wdata->state.lock, flags);
2441 
2442 	return 0;
2443 }
2444 
2445 static void wiimod_no_mp_remove(const struct wiimod_ops *ops,
2446 				struct wiimote_data *wdata)
2447 {
2448 	unsigned long flags;
2449 
2450 	spin_lock_irqsave(&wdata->state.lock, flags);
2451 	wdata->state.flags |= WIIPROTO_FLAG_NO_MP;
2452 	spin_unlock_irqrestore(&wdata->state.lock, flags);
2453 }
2454 
2455 static const struct wiimod_ops wiimod_no_mp = {
2456 	.flags = 0,
2457 	.arg = 0,
2458 	.probe = wiimod_no_mp_probe,
2459 	.remove = wiimod_no_mp_remove,
2460 };
2461 
2462 /*
2463  * Motion Plus
2464  * The Motion Plus extension provides rotation sensors (gyro) as a small
2465  * extension device for Wii Remotes. Many devices have them built-in so
2466  * you cannot see them from the outside.
2467  * Motion Plus extensions are special because they are on a separate extension
2468  * port and allow other extensions to be used simultaneously. This is all
2469  * handled by the Wiimote Core so we don't have to deal with it.
2470  */
2471 
2472 static void wiimod_mp_in_mp(struct wiimote_data *wdata, const __u8 *ext)
2473 {
2474 	__s32 x, y, z;
2475 
2476 	/*        |   8    7    6    5    4    3 |  2  |  1  |
2477 	 *   -----+------------------------------+-----+-----+
2478 	 *    1   |               Yaw Speed <7:0>            |
2479 	 *    2   |              Roll Speed <7:0>            |
2480 	 *    3   |             Pitch Speed <7:0>            |
2481 	 *   -----+------------------------------+-----+-----+
2482 	 *    4   |       Yaw Speed <13:8>       | Yaw |Pitch|
2483 	 *   -----+------------------------------+-----+-----+
2484 	 *    5   |      Roll Speed <13:8>       |Roll | Ext |
2485 	 *   -----+------------------------------+-----+-----+
2486 	 *    6   |     Pitch Speed <13:8>       |  1  |  0  |
2487 	 *   -----+------------------------------+-----+-----+
2488 	 * The single bits Yaw, Roll, Pitch in the lower right corner specify
2489 	 * whether the wiimote is rotating fast (0) or slow (1). Speed for slow
2490 	 * roation is 8192/440 units / deg/s and for fast rotation 8192/2000
2491 	 * units / deg/s. To get a linear scale for fast rotation we multiply
2492 	 * by 2000/440 = ~4.5454 and scale both fast and slow by 9 to match the
2493 	 * previous scale reported by this driver.
2494 	 * This leaves a linear scale with 8192*9/440 (~167.564) units / deg/s.
2495 	 * If the wiimote is not rotating the sensor reports 2^13 = 8192.
2496 	 * Ext specifies whether an extension is connected to the motionp.
2497 	 * which is parsed by wiimote-core.
2498 	 */
2499 
2500 	x = ext[0];
2501 	y = ext[1];
2502 	z = ext[2];
2503 
2504 	x |= (((__u16)ext[3]) << 6) & 0xff00;
2505 	y |= (((__u16)ext[4]) << 6) & 0xff00;
2506 	z |= (((__u16)ext[5]) << 6) & 0xff00;
2507 
2508 	x -= 8192;
2509 	y -= 8192;
2510 	z -= 8192;
2511 
2512 	if (!(ext[3] & 0x02))
2513 		x = (x * 2000 * 9) / 440;
2514 	else
2515 		x *= 9;
2516 	if (!(ext[4] & 0x02))
2517 		y = (y * 2000 * 9) / 440;
2518 	else
2519 		y *= 9;
2520 	if (!(ext[3] & 0x01))
2521 		z = (z * 2000 * 9) / 440;
2522 	else
2523 		z *= 9;
2524 
2525 	input_report_abs(wdata->mp, ABS_RX, x);
2526 	input_report_abs(wdata->mp, ABS_RY, y);
2527 	input_report_abs(wdata->mp, ABS_RZ, z);
2528 	input_sync(wdata->mp);
2529 }
2530 
2531 static int wiimod_mp_open(struct input_dev *dev)
2532 {
2533 	struct wiimote_data *wdata = input_get_drvdata(dev);
2534 	unsigned long flags;
2535 
2536 	spin_lock_irqsave(&wdata->state.lock, flags);
2537 	wdata->state.flags |= WIIPROTO_FLAG_MP_USED;
2538 	wiiproto_req_drm(wdata, WIIPROTO_REQ_NULL);
2539 	__wiimote_schedule(wdata);
2540 	spin_unlock_irqrestore(&wdata->state.lock, flags);
2541 
2542 	return 0;
2543 }
2544 
2545 static void wiimod_mp_close(struct input_dev *dev)
2546 {
2547 	struct wiimote_data *wdata = input_get_drvdata(dev);
2548 	unsigned long flags;
2549 
2550 	spin_lock_irqsave(&wdata->state.lock, flags);
2551 	wdata->state.flags &= ~WIIPROTO_FLAG_MP_USED;
2552 	wiiproto_req_drm(wdata, WIIPROTO_REQ_NULL);
2553 	__wiimote_schedule(wdata);
2554 	spin_unlock_irqrestore(&wdata->state.lock, flags);
2555 }
2556 
2557 static int wiimod_mp_probe(const struct wiimod_ops *ops,
2558 			   struct wiimote_data *wdata)
2559 {
2560 	int ret;
2561 
2562 	wdata->mp = input_allocate_device();
2563 	if (!wdata->mp)
2564 		return -ENOMEM;
2565 
2566 	input_set_drvdata(wdata->mp, wdata);
2567 	wdata->mp->open = wiimod_mp_open;
2568 	wdata->mp->close = wiimod_mp_close;
2569 	wdata->mp->dev.parent = &wdata->hdev->dev;
2570 	wdata->mp->id.bustype = wdata->hdev->bus;
2571 	wdata->mp->id.vendor = wdata->hdev->vendor;
2572 	wdata->mp->id.product = wdata->hdev->product;
2573 	wdata->mp->id.version = wdata->hdev->version;
2574 	wdata->mp->name = WIIMOTE_NAME " Motion Plus";
2575 
2576 	set_bit(EV_ABS, wdata->mp->evbit);
2577 	set_bit(ABS_RX, wdata->mp->absbit);
2578 	set_bit(ABS_RY, wdata->mp->absbit);
2579 	set_bit(ABS_RZ, wdata->mp->absbit);
2580 	input_set_abs_params(wdata->mp,
2581 			     ABS_RX, -16000, 16000, 4, 8);
2582 	input_set_abs_params(wdata->mp,
2583 			     ABS_RY, -16000, 16000, 4, 8);
2584 	input_set_abs_params(wdata->mp,
2585 			     ABS_RZ, -16000, 16000, 4, 8);
2586 
2587 	ret = input_register_device(wdata->mp);
2588 	if (ret)
2589 		goto err_free;
2590 
2591 	return 0;
2592 
2593 err_free:
2594 	input_free_device(wdata->mp);
2595 	wdata->mp = NULL;
2596 	return ret;
2597 }
2598 
2599 static void wiimod_mp_remove(const struct wiimod_ops *ops,
2600 			     struct wiimote_data *wdata)
2601 {
2602 	if (!wdata->mp)
2603 		return;
2604 
2605 	input_unregister_device(wdata->mp);
2606 	wdata->mp = NULL;
2607 }
2608 
2609 const struct wiimod_ops wiimod_mp = {
2610 	.flags = 0,
2611 	.arg = 0,
2612 	.probe = wiimod_mp_probe,
2613 	.remove = wiimod_mp_remove,
2614 	.in_mp = wiimod_mp_in_mp,
2615 };
2616 
2617 /* module table */
2618 
2619 static const struct wiimod_ops wiimod_dummy;
2620 
2621 const struct wiimod_ops *wiimod_table[WIIMOD_NUM] = {
2622 	[WIIMOD_KEYS] = &wiimod_keys,
2623 	[WIIMOD_RUMBLE] = &wiimod_rumble,
2624 	[WIIMOD_BATTERY] = &wiimod_battery,
2625 	[WIIMOD_LED1] = &wiimod_leds[0],
2626 	[WIIMOD_LED2] = &wiimod_leds[1],
2627 	[WIIMOD_LED3] = &wiimod_leds[2],
2628 	[WIIMOD_LED4] = &wiimod_leds[3],
2629 	[WIIMOD_ACCEL] = &wiimod_accel,
2630 	[WIIMOD_IR] = &wiimod_ir,
2631 	[WIIMOD_BUILTIN_MP] = &wiimod_builtin_mp,
2632 	[WIIMOD_NO_MP] = &wiimod_no_mp,
2633 };
2634 
2635 const struct wiimod_ops *wiimod_ext_table[WIIMOTE_EXT_NUM] = {
2636 	[WIIMOTE_EXT_NONE] = &wiimod_dummy,
2637 	[WIIMOTE_EXT_UNKNOWN] = &wiimod_dummy,
2638 	[WIIMOTE_EXT_NUNCHUK] = &wiimod_nunchuk,
2639 	[WIIMOTE_EXT_CLASSIC_CONTROLLER] = &wiimod_classic,
2640 	[WIIMOTE_EXT_BALANCE_BOARD] = &wiimod_bboard,
2641 	[WIIMOTE_EXT_PRO_CONTROLLER] = &wiimod_pro,
2642 	[WIIMOTE_EXT_DRUMS] = &wiimod_drums,
2643 	[WIIMOTE_EXT_GUITAR] = &wiimod_guitar,
2644 };
2645