1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * HID driver for Nintendo Wii / Wii U peripherals
4 * Copyright (c) 2011-2013 David Herrmann <dh.herrmann@gmail.com>
5 */
6
7/*
8 */
9
10#include <linux/completion.h>
11#include <linux/device.h>
12#include <linux/hid.h>
13#include <linux/input.h>
14#include <linux/module.h>
15#include <linux/mutex.h>
16#include <linux/spinlock.h>
17#include "hid-ids.h"
18#include "hid-wiimote.h"
19
20/* output queue handling */
21
22static int wiimote_hid_send(struct hid_device *hdev, __u8 *buffer,
23 size_t count)
24{
25 __u8 *buf;
26 int ret;
27
28 if (!hdev->ll_driver->output_report)
29 return -ENODEV;
30
31 buf = kmemdup(buffer, count, GFP_KERNEL);
32 if (!buf)
33 return -ENOMEM;
34
35 ret = hid_hw_output_report(hdev, buf, len: count);
36
37 kfree(objp: buf);
38 return ret;
39}
40
41static void wiimote_queue_worker(struct work_struct *work)
42{
43 struct wiimote_queue *queue = container_of(work, struct wiimote_queue,
44 worker);
45 struct wiimote_data *wdata = container_of(queue, struct wiimote_data,
46 queue);
47 unsigned long flags;
48 int ret;
49
50 spin_lock_irqsave(&wdata->queue.lock, flags);
51
52 while (wdata->queue.head != wdata->queue.tail) {
53 spin_unlock_irqrestore(lock: &wdata->queue.lock, flags);
54 ret = wiimote_hid_send(hdev: wdata->hdev,
55 buffer: wdata->queue.outq[wdata->queue.tail].data,
56 count: wdata->queue.outq[wdata->queue.tail].size);
57 if (ret < 0) {
58 spin_lock_irqsave(&wdata->state.lock, flags);
59 wiimote_cmd_abort(wdata);
60 spin_unlock_irqrestore(lock: &wdata->state.lock, flags);
61 }
62 spin_lock_irqsave(&wdata->queue.lock, flags);
63
64 wdata->queue.tail = (wdata->queue.tail + 1) % WIIMOTE_BUFSIZE;
65 }
66
67 spin_unlock_irqrestore(lock: &wdata->queue.lock, flags);
68}
69
70static void wiimote_queue(struct wiimote_data *wdata, const __u8 *buffer,
71 size_t count)
72{
73 unsigned long flags;
74 __u8 newhead;
75
76 if (count > HID_MAX_BUFFER_SIZE) {
77 hid_warn(wdata->hdev, "Sending too large output report\n");
78
79 spin_lock_irqsave(&wdata->queue.lock, flags);
80 goto out_error;
81 }
82
83 /*
84 * Copy new request into our output queue and check whether the
85 * queue is full. If it is full, discard this request.
86 * If it is empty we need to start a new worker that will
87 * send out the buffer to the hid device.
88 * If the queue is not empty, then there must be a worker
89 * that is currently sending out our buffer and this worker
90 * will reschedule itself until the queue is empty.
91 */
92
93 spin_lock_irqsave(&wdata->queue.lock, flags);
94
95 memcpy(wdata->queue.outq[wdata->queue.head].data, buffer, count);
96 wdata->queue.outq[wdata->queue.head].size = count;
97 newhead = (wdata->queue.head + 1) % WIIMOTE_BUFSIZE;
98
99 if (wdata->queue.head == wdata->queue.tail) {
100 wdata->queue.head = newhead;
101 schedule_work(work: &wdata->queue.worker);
102 } else if (newhead != wdata->queue.tail) {
103 wdata->queue.head = newhead;
104 } else {
105 hid_warn(wdata->hdev, "Output queue is full");
106 goto out_error;
107 }
108
109 goto out_unlock;
110
111out_error:
112 wiimote_cmd_abort(wdata);
113out_unlock:
114 spin_unlock_irqrestore(lock: &wdata->queue.lock, flags);
115}
116
117/*
118 * This sets the rumble bit on the given output report if rumble is
119 * currently enabled.
120 * \cmd1 must point to the second byte in the output report => &cmd[1]
121 * This must be called on nearly every output report before passing it
122 * into the output queue!
123 */
124static inline void wiiproto_keep_rumble(struct wiimote_data *wdata, __u8 *cmd1)
125{
126 if (wdata->state.flags & WIIPROTO_FLAG_RUMBLE)
127 *cmd1 |= 0x01;
128}
129
130void wiiproto_req_rumble(struct wiimote_data *wdata, __u8 rumble)
131{
132 __u8 cmd[2];
133
134 rumble = !!rumble;
135 if (rumble == !!(wdata->state.flags & WIIPROTO_FLAG_RUMBLE))
136 return;
137
138 if (rumble)
139 wdata->state.flags |= WIIPROTO_FLAG_RUMBLE;
140 else
141 wdata->state.flags &= ~WIIPROTO_FLAG_RUMBLE;
142
143 cmd[0] = WIIPROTO_REQ_RUMBLE;
144 cmd[1] = 0;
145
146 wiiproto_keep_rumble(wdata, cmd1: &cmd[1]);
147 wiimote_queue(wdata, buffer: cmd, count: sizeof(cmd));
148}
149
150void wiiproto_req_leds(struct wiimote_data *wdata, int leds)
151{
152 __u8 cmd[2];
153
154 leds &= WIIPROTO_FLAGS_LEDS;
155 if ((wdata->state.flags & WIIPROTO_FLAGS_LEDS) == leds)
156 return;
157 wdata->state.flags = (wdata->state.flags & ~WIIPROTO_FLAGS_LEDS) | leds;
158
159 cmd[0] = WIIPROTO_REQ_LED;
160 cmd[1] = 0;
161
162 if (leds & WIIPROTO_FLAG_LED1)
163 cmd[1] |= 0x10;
164 if (leds & WIIPROTO_FLAG_LED2)
165 cmd[1] |= 0x20;
166 if (leds & WIIPROTO_FLAG_LED3)
167 cmd[1] |= 0x40;
168 if (leds & WIIPROTO_FLAG_LED4)
169 cmd[1] |= 0x80;
170
171 wiiproto_keep_rumble(wdata, cmd1: &cmd[1]);
172 wiimote_queue(wdata, buffer: cmd, count: sizeof(cmd));
173}
174
175/*
176 * Check what peripherals of the wiimote are currently
177 * active and select a proper DRM that supports all of
178 * the requested data inputs.
179 *
180 * Not all combinations are actually supported. The following
181 * combinations work only with limitations:
182 * - IR cam in extended or full mode disables any data transmission
183 * of extension controllers. There is no DRM mode that supports
184 * extension bytes plus extended/full IR.
185 * - IR cam with accelerometer and extension *_EXT8 is not supported.
186 * However, all extensions that need *_EXT8 are devices that don't
187 * support IR cameras. Hence, this shouldn't happen under normal
188 * operation.
189 * - *_EXT16 is only supported in combination with buttons and
190 * accelerometer. No IR or similar can be active simultaneously. As
191 * above, all modules that require it are mutually exclusive with
192 * IR/etc. so this doesn't matter.
193 */
194static __u8 select_drm(struct wiimote_data *wdata)
195{
196 __u8 ir = wdata->state.flags & WIIPROTO_FLAGS_IR;
197 bool ext;
198
199 ext = (wdata->state.flags & WIIPROTO_FLAG_EXT_USED) ||
200 (wdata->state.flags & WIIPROTO_FLAG_MP_USED);
201
202 /* some 3rd-party balance-boards are hard-coded to KEE, *sigh* */
203 if (wdata->state.devtype == WIIMOTE_DEV_BALANCE_BOARD) {
204 if (ext)
205 return WIIPROTO_REQ_DRM_KEE;
206 else
207 return WIIPROTO_REQ_DRM_K;
208 }
209
210 if (ir == WIIPROTO_FLAG_IR_BASIC) {
211 if (wdata->state.flags & WIIPROTO_FLAG_ACCEL) {
212 /* GEN10 and ealier devices bind IR formats to DRMs.
213 * Hence, we cannot use DRM_KAI here as it might be
214 * bound to IR_EXT. Use DRM_KAIE unconditionally so we
215 * work with all devices and our parsers can use the
216 * fixed formats, too. */
217 return WIIPROTO_REQ_DRM_KAIE;
218 } else {
219 return WIIPROTO_REQ_DRM_KIE;
220 }
221 } else if (ir == WIIPROTO_FLAG_IR_EXT) {
222 return WIIPROTO_REQ_DRM_KAI;
223 } else if (ir == WIIPROTO_FLAG_IR_FULL) {
224 return WIIPROTO_REQ_DRM_SKAI1;
225 } else {
226 if (wdata->state.flags & WIIPROTO_FLAG_ACCEL) {
227 if (ext)
228 return WIIPROTO_REQ_DRM_KAE;
229 else
230 return WIIPROTO_REQ_DRM_KA;
231 } else {
232 if (ext)
233 return WIIPROTO_REQ_DRM_KEE;
234 else
235 return WIIPROTO_REQ_DRM_K;
236 }
237 }
238}
239
240void wiiproto_req_drm(struct wiimote_data *wdata, __u8 drm)
241{
242 __u8 cmd[3];
243
244 if (wdata->state.flags & WIIPROTO_FLAG_DRM_LOCKED)
245 drm = wdata->state.drm;
246 else if (drm == WIIPROTO_REQ_NULL)
247 drm = select_drm(wdata);
248
249 cmd[0] = WIIPROTO_REQ_DRM;
250 cmd[1] = 0;
251 cmd[2] = drm;
252
253 wdata->state.drm = drm;
254 wiiproto_keep_rumble(wdata, cmd1: &cmd[1]);
255 wiimote_queue(wdata, buffer: cmd, count: sizeof(cmd));
256}
257
258void wiiproto_req_status(struct wiimote_data *wdata)
259{
260 __u8 cmd[2];
261
262 cmd[0] = WIIPROTO_REQ_SREQ;
263 cmd[1] = 0;
264
265 wiiproto_keep_rumble(wdata, cmd1: &cmd[1]);
266 wiimote_queue(wdata, buffer: cmd, count: sizeof(cmd));
267}
268
269void wiiproto_req_accel(struct wiimote_data *wdata, __u8 accel)
270{
271 accel = !!accel;
272 if (accel == !!(wdata->state.flags & WIIPROTO_FLAG_ACCEL))
273 return;
274
275 if (accel)
276 wdata->state.flags |= WIIPROTO_FLAG_ACCEL;
277 else
278 wdata->state.flags &= ~WIIPROTO_FLAG_ACCEL;
279
280 wiiproto_req_drm(wdata, drm: WIIPROTO_REQ_NULL);
281}
282
283void wiiproto_req_ir1(struct wiimote_data *wdata, __u8 flags)
284{
285 __u8 cmd[2];
286
287 cmd[0] = WIIPROTO_REQ_IR1;
288 cmd[1] = flags;
289
290 wiiproto_keep_rumble(wdata, cmd1: &cmd[1]);
291 wiimote_queue(wdata, buffer: cmd, count: sizeof(cmd));
292}
293
294void wiiproto_req_ir2(struct wiimote_data *wdata, __u8 flags)
295{
296 __u8 cmd[2];
297
298 cmd[0] = WIIPROTO_REQ_IR2;
299 cmd[1] = flags;
300
301 wiiproto_keep_rumble(wdata, cmd1: &cmd[1]);
302 wiimote_queue(wdata, buffer: cmd, count: sizeof(cmd));
303}
304
305#define wiiproto_req_wreg(wdata, os, buf, sz) \
306 wiiproto_req_wmem((wdata), false, (os), (buf), (sz))
307
308#define wiiproto_req_weeprom(wdata, os, buf, sz) \
309 wiiproto_req_wmem((wdata), true, (os), (buf), (sz))
310
311static void wiiproto_req_wmem(struct wiimote_data *wdata, bool eeprom,
312 __u32 offset, const __u8 *buf, __u8 size)
313{
314 __u8 cmd[22];
315
316 if (size > 16 || size == 0) {
317 hid_warn(wdata->hdev, "Invalid length %d wmem request\n", size);
318 return;
319 }
320
321 memset(cmd, 0, sizeof(cmd));
322 cmd[0] = WIIPROTO_REQ_WMEM;
323 cmd[2] = (offset >> 16) & 0xff;
324 cmd[3] = (offset >> 8) & 0xff;
325 cmd[4] = offset & 0xff;
326 cmd[5] = size;
327 memcpy(&cmd[6], buf, size);
328
329 if (!eeprom)
330 cmd[1] |= 0x04;
331
332 wiiproto_keep_rumble(wdata, cmd1: &cmd[1]);
333 wiimote_queue(wdata, buffer: cmd, count: sizeof(cmd));
334}
335
336void wiiproto_req_rmem(struct wiimote_data *wdata, bool eeprom, __u32 offset,
337 __u16 size)
338{
339 __u8 cmd[7];
340
341 if (size == 0) {
342 hid_warn(wdata->hdev, "Invalid length %d rmem request\n", size);
343 return;
344 }
345
346 cmd[0] = WIIPROTO_REQ_RMEM;
347 cmd[1] = 0;
348 cmd[2] = (offset >> 16) & 0xff;
349 cmd[3] = (offset >> 8) & 0xff;
350 cmd[4] = offset & 0xff;
351 cmd[5] = (size >> 8) & 0xff;
352 cmd[6] = size & 0xff;
353
354 if (!eeprom)
355 cmd[1] |= 0x04;
356
357 wiiproto_keep_rumble(wdata, cmd1: &cmd[1]);
358 wiimote_queue(wdata, buffer: cmd, count: sizeof(cmd));
359}
360
361/* requries the cmd-mutex to be held */
362int wiimote_cmd_write(struct wiimote_data *wdata, __u32 offset,
363 const __u8 *wmem, __u8 size)
364{
365 unsigned long flags;
366 int ret;
367
368 spin_lock_irqsave(&wdata->state.lock, flags);
369 wiimote_cmd_set(wdata, cmd: WIIPROTO_REQ_WMEM, opt: 0);
370 wiiproto_req_wreg(wdata, offset, wmem, size);
371 spin_unlock_irqrestore(lock: &wdata->state.lock, flags);
372
373 ret = wiimote_cmd_wait(wdata);
374 if (!ret && wdata->state.cmd_err)
375 ret = -EIO;
376
377 return ret;
378}
379
380/* requries the cmd-mutex to be held */
381ssize_t wiimote_cmd_read(struct wiimote_data *wdata, __u32 offset, __u8 *rmem,
382 __u8 size)
383{
384 unsigned long flags;
385 ssize_t ret;
386
387 spin_lock_irqsave(&wdata->state.lock, flags);
388 wdata->state.cmd_read_size = size;
389 wdata->state.cmd_read_buf = rmem;
390 wiimote_cmd_set(wdata, cmd: WIIPROTO_REQ_RMEM, opt: offset & 0xffff);
391 wiiproto_req_rreg(wdata, offset, size);
392 spin_unlock_irqrestore(lock: &wdata->state.lock, flags);
393
394 ret = wiimote_cmd_wait(wdata);
395
396 spin_lock_irqsave(&wdata->state.lock, flags);
397 wdata->state.cmd_read_buf = NULL;
398 spin_unlock_irqrestore(lock: &wdata->state.lock, flags);
399
400 if (!ret) {
401 if (wdata->state.cmd_read_size == 0)
402 ret = -EIO;
403 else
404 ret = wdata->state.cmd_read_size;
405 }
406
407 return ret;
408}
409
410/* requires the cmd-mutex to be held */
411static int wiimote_cmd_init_ext(struct wiimote_data *wdata)
412{
413 __u8 wmem;
414 int ret;
415
416 /* initialize extension */
417 wmem = 0x55;
418 ret = wiimote_cmd_write(wdata, offset: 0xa400f0, wmem: &wmem, size: sizeof(wmem));
419 if (ret)
420 return ret;
421
422 /* disable default encryption */
423 wmem = 0x0;
424 ret = wiimote_cmd_write(wdata, offset: 0xa400fb, wmem: &wmem, size: sizeof(wmem));
425 if (ret)
426 return ret;
427
428 return 0;
429}
430
431/* requires the cmd-mutex to be held */
432static __u8 wiimote_cmd_read_ext(struct wiimote_data *wdata, __u8 *rmem)
433{
434 int ret;
435
436 /* read extension ID */
437 ret = wiimote_cmd_read(wdata, offset: 0xa400fa, rmem, size: 6);
438 if (ret != 6)
439 return WIIMOTE_EXT_NONE;
440
441 hid_dbg(wdata->hdev, "extension ID: %6phC\n", rmem);
442
443 if (rmem[0] == 0xff && rmem[1] == 0xff && rmem[2] == 0xff &&
444 rmem[3] == 0xff && rmem[4] == 0xff && rmem[5] == 0xff)
445 return WIIMOTE_EXT_NONE;
446
447 if (rmem[4] == 0x00 && rmem[5] == 0x00)
448 return WIIMOTE_EXT_NUNCHUK;
449 if (rmem[4] == 0x01 && rmem[5] == 0x01)
450 return WIIMOTE_EXT_CLASSIC_CONTROLLER;
451 if (rmem[4] == 0x04 && rmem[5] == 0x02)
452 return WIIMOTE_EXT_BALANCE_BOARD;
453 if (rmem[4] == 0x01 && rmem[5] == 0x20)
454 return WIIMOTE_EXT_PRO_CONTROLLER;
455 if (rmem[0] == 0x01 && rmem[1] == 0x00 &&
456 rmem[4] == 0x01 && rmem[5] == 0x03)
457 return WIIMOTE_EXT_DRUMS;
458 if (rmem[0] == 0x00 && rmem[1] == 0x00 &&
459 rmem[4] == 0x01 && rmem[5] == 0x03)
460 return WIIMOTE_EXT_GUITAR;
461 if (rmem[0] == 0x03 && rmem[1] == 0x00 &&
462 rmem[4] == 0x01 && rmem[5] == 0x03)
463 return WIIMOTE_EXT_TURNTABLE;
464
465 return WIIMOTE_EXT_UNKNOWN;
466}
467
468/* requires the cmd-mutex to be held */
469static int wiimote_cmd_init_mp(struct wiimote_data *wdata)
470{
471 __u8 wmem;
472 int ret;
473
474 /* initialize MP */
475 wmem = 0x55;
476 ret = wiimote_cmd_write(wdata, offset: 0xa600f0, wmem: &wmem, size: sizeof(wmem));
477 if (ret)
478 return ret;
479
480 /* disable default encryption */
481 wmem = 0x0;
482 ret = wiimote_cmd_write(wdata, offset: 0xa600fb, wmem: &wmem, size: sizeof(wmem));
483 if (ret)
484 return ret;
485
486 return 0;
487}
488
489/* requires the cmd-mutex to be held */
490static bool wiimote_cmd_map_mp(struct wiimote_data *wdata, __u8 exttype)
491{
492 __u8 wmem;
493
494 /* map MP with correct pass-through mode */
495 switch (exttype) {
496 case WIIMOTE_EXT_CLASSIC_CONTROLLER:
497 case WIIMOTE_EXT_DRUMS:
498 case WIIMOTE_EXT_GUITAR:
499 wmem = 0x07;
500 break;
501 case WIIMOTE_EXT_TURNTABLE:
502 case WIIMOTE_EXT_NUNCHUK:
503 wmem = 0x05;
504 break;
505 default:
506 wmem = 0x04;
507 break;
508 }
509
510 return wiimote_cmd_write(wdata, offset: 0xa600fe, wmem: &wmem, size: sizeof(wmem));
511}
512
513/* requires the cmd-mutex to be held */
514static bool wiimote_cmd_read_mp(struct wiimote_data *wdata, __u8 *rmem)
515{
516 int ret;
517
518 /* read motion plus ID */
519 ret = wiimote_cmd_read(wdata, offset: 0xa600fa, rmem, size: 6);
520 if (ret != 6)
521 return false;
522
523 hid_dbg(wdata->hdev, "motion plus ID: %6phC\n", rmem);
524
525 if (rmem[5] == 0x05)
526 return true;
527
528 hid_info(wdata->hdev, "unknown motion plus ID: %6phC\n", rmem);
529
530 return false;
531}
532
533/* requires the cmd-mutex to be held */
534static __u8 wiimote_cmd_read_mp_mapped(struct wiimote_data *wdata)
535{
536 int ret;
537 __u8 rmem[6];
538
539 /* read motion plus ID */
540 ret = wiimote_cmd_read(wdata, offset: 0xa400fa, rmem, size: 6);
541 if (ret != 6)
542 return WIIMOTE_MP_NONE;
543
544 hid_dbg(wdata->hdev, "mapped motion plus ID: %6phC\n", rmem);
545
546 if (rmem[0] == 0xff && rmem[1] == 0xff && rmem[2] == 0xff &&
547 rmem[3] == 0xff && rmem[4] == 0xff && rmem[5] == 0xff)
548 return WIIMOTE_MP_NONE;
549
550 if (rmem[4] == 0x04 && rmem[5] == 0x05)
551 return WIIMOTE_MP_SINGLE;
552 else if (rmem[4] == 0x05 && rmem[5] == 0x05)
553 return WIIMOTE_MP_PASSTHROUGH_NUNCHUK;
554 else if (rmem[4] == 0x07 && rmem[5] == 0x05)
555 return WIIMOTE_MP_PASSTHROUGH_CLASSIC;
556
557 return WIIMOTE_MP_UNKNOWN;
558}
559
560/* device module handling */
561
562static const __u8 * const wiimote_devtype_mods[WIIMOTE_DEV_NUM] = {
563 [WIIMOTE_DEV_PENDING] = (const __u8[]){
564 WIIMOD_NULL,
565 },
566 [WIIMOTE_DEV_UNKNOWN] = (const __u8[]){
567 WIIMOD_NO_MP,
568 WIIMOD_NULL,
569 },
570 [WIIMOTE_DEV_GENERIC] = (const __u8[]){
571 WIIMOD_KEYS,
572 WIIMOD_RUMBLE,
573 WIIMOD_BATTERY,
574 WIIMOD_LED1,
575 WIIMOD_LED2,
576 WIIMOD_LED3,
577 WIIMOD_LED4,
578 WIIMOD_ACCEL,
579 WIIMOD_IR,
580 WIIMOD_NULL,
581 },
582 [WIIMOTE_DEV_GEN10] = (const __u8[]){
583 WIIMOD_KEYS,
584 WIIMOD_RUMBLE,
585 WIIMOD_BATTERY,
586 WIIMOD_LED1,
587 WIIMOD_LED2,
588 WIIMOD_LED3,
589 WIIMOD_LED4,
590 WIIMOD_ACCEL,
591 WIIMOD_IR,
592 WIIMOD_NULL,
593 },
594 [WIIMOTE_DEV_GEN20] = (const __u8[]){
595 WIIMOD_KEYS,
596 WIIMOD_RUMBLE,
597 WIIMOD_BATTERY,
598 WIIMOD_LED1,
599 WIIMOD_LED2,
600 WIIMOD_LED3,
601 WIIMOD_LED4,
602 WIIMOD_ACCEL,
603 WIIMOD_IR,
604 WIIMOD_BUILTIN_MP,
605 WIIMOD_NULL,
606 },
607 [WIIMOTE_DEV_BALANCE_BOARD] = (const __u8[]) {
608 WIIMOD_BATTERY,
609 WIIMOD_LED1,
610 WIIMOD_NO_MP,
611 WIIMOD_NULL,
612 },
613 [WIIMOTE_DEV_PRO_CONTROLLER] = (const __u8[]) {
614 WIIMOD_BATTERY,
615 WIIMOD_LED1,
616 WIIMOD_LED2,
617 WIIMOD_LED3,
618 WIIMOD_LED4,
619 WIIMOD_NO_MP,
620 WIIMOD_NULL,
621 },
622};
623
624static void wiimote_modules_load(struct wiimote_data *wdata,
625 unsigned int devtype)
626{
627 bool need_input = false;
628 const __u8 *mods, *iter;
629 const struct wiimod_ops *ops;
630 int ret;
631
632 mods = wiimote_devtype_mods[devtype];
633
634 for (iter = mods; *iter != WIIMOD_NULL; ++iter) {
635 if (wiimod_table[*iter]->flags & WIIMOD_FLAG_INPUT) {
636 need_input = true;
637 break;
638 }
639 }
640
641 if (need_input) {
642 wdata->input = input_allocate_device();
643 if (!wdata->input)
644 return;
645
646 input_set_drvdata(dev: wdata->input, data: wdata);
647 wdata->input->dev.parent = &wdata->hdev->dev;
648 wdata->input->id.bustype = wdata->hdev->bus;
649 wdata->input->id.vendor = wdata->hdev->vendor;
650 wdata->input->id.product = wdata->hdev->product;
651 wdata->input->id.version = wdata->hdev->version;
652 wdata->input->name = WIIMOTE_NAME;
653 }
654
655 for (iter = mods; *iter != WIIMOD_NULL; ++iter) {
656 ops = wiimod_table[*iter];
657 if (!ops->probe)
658 continue;
659
660 ret = ops->probe(ops, wdata);
661 if (ret)
662 goto error;
663 }
664
665 if (wdata->input) {
666 ret = input_register_device(wdata->input);
667 if (ret)
668 goto error;
669 }
670
671 spin_lock_irq(lock: &wdata->state.lock);
672 wdata->state.devtype = devtype;
673 spin_unlock_irq(lock: &wdata->state.lock);
674 return;
675
676error:
677 for ( ; iter-- != mods; ) {
678 ops = wiimod_table[*iter];
679 if (ops->remove)
680 ops->remove(ops, wdata);
681 }
682
683 if (wdata->input) {
684 input_free_device(dev: wdata->input);
685 wdata->input = NULL;
686 }
687}
688
689static void wiimote_modules_unload(struct wiimote_data *wdata)
690{
691 const __u8 *mods, *iter;
692 const struct wiimod_ops *ops;
693 unsigned long flags;
694
695 mods = wiimote_devtype_mods[wdata->state.devtype];
696
697 spin_lock_irqsave(&wdata->state.lock, flags);
698 wdata->state.devtype = WIIMOTE_DEV_UNKNOWN;
699 spin_unlock_irqrestore(lock: &wdata->state.lock, flags);
700
701 /* find end of list */
702 for (iter = mods; *iter != WIIMOD_NULL; ++iter)
703 /* empty */ ;
704
705 if (wdata->input) {
706 input_get_device(dev: wdata->input);
707 input_unregister_device(wdata->input);
708 }
709
710 for ( ; iter-- != mods; ) {
711 ops = wiimod_table[*iter];
712 if (ops->remove)
713 ops->remove(ops, wdata);
714 }
715
716 if (wdata->input) {
717 input_put_device(dev: wdata->input);
718 wdata->input = NULL;
719 }
720}
721
722/* device extension handling */
723
724static void wiimote_ext_load(struct wiimote_data *wdata, unsigned int ext)
725{
726 unsigned long flags;
727 const struct wiimod_ops *ops;
728 int ret;
729
730 ops = wiimod_ext_table[ext];
731
732 if (ops->probe) {
733 ret = ops->probe(ops, wdata);
734 if (ret)
735 ext = WIIMOTE_EXT_UNKNOWN;
736 }
737
738 spin_lock_irqsave(&wdata->state.lock, flags);
739 wdata->state.exttype = ext;
740 spin_unlock_irqrestore(lock: &wdata->state.lock, flags);
741}
742
743static void wiimote_ext_unload(struct wiimote_data *wdata)
744{
745 unsigned long flags;
746 const struct wiimod_ops *ops;
747
748 ops = wiimod_ext_table[wdata->state.exttype];
749
750 spin_lock_irqsave(&wdata->state.lock, flags);
751 wdata->state.exttype = WIIMOTE_EXT_UNKNOWN;
752 wdata->state.flags &= ~WIIPROTO_FLAG_EXT_USED;
753 spin_unlock_irqrestore(lock: &wdata->state.lock, flags);
754
755 if (ops->remove)
756 ops->remove(ops, wdata);
757}
758
759static void wiimote_mp_load(struct wiimote_data *wdata)
760{
761 unsigned long flags;
762 const struct wiimod_ops *ops;
763 int ret;
764 __u8 mode = 2;
765
766 ops = &wiimod_mp;
767 if (ops->probe) {
768 ret = ops->probe(ops, wdata);
769 if (ret)
770 mode = 1;
771 }
772
773 spin_lock_irqsave(&wdata->state.lock, flags);
774 wdata->state.mp = mode;
775 spin_unlock_irqrestore(lock: &wdata->state.lock, flags);
776}
777
778static void wiimote_mp_unload(struct wiimote_data *wdata)
779{
780 unsigned long flags;
781 const struct wiimod_ops *ops;
782
783 if (wdata->state.mp < 2)
784 return;
785
786 ops = &wiimod_mp;
787
788 spin_lock_irqsave(&wdata->state.lock, flags);
789 wdata->state.mp = 0;
790 wdata->state.flags &= ~WIIPROTO_FLAG_MP_USED;
791 spin_unlock_irqrestore(lock: &wdata->state.lock, flags);
792
793 if (ops->remove)
794 ops->remove(ops, wdata);
795}
796
797/* device (re-)initialization and detection */
798
799static const char *wiimote_devtype_names[WIIMOTE_DEV_NUM] = {
800 [WIIMOTE_DEV_PENDING] = "Pending",
801 [WIIMOTE_DEV_UNKNOWN] = "Unknown",
802 [WIIMOTE_DEV_GENERIC] = "Generic",
803 [WIIMOTE_DEV_GEN10] = "Nintendo Wii Remote (Gen 1)",
804 [WIIMOTE_DEV_GEN20] = "Nintendo Wii Remote Plus (Gen 2)",
805 [WIIMOTE_DEV_BALANCE_BOARD] = "Nintendo Wii Balance Board",
806 [WIIMOTE_DEV_PRO_CONTROLLER] = "Nintendo Wii U Pro Controller",
807};
808
809/* Try to guess the device type based on all collected information. We
810 * first try to detect by static extension types, then VID/PID and the
811 * device name. If we cannot detect the device, we use
812 * WIIMOTE_DEV_GENERIC so all modules will get probed on the device. */
813static void wiimote_init_set_type(struct wiimote_data *wdata,
814 __u8 exttype)
815{
816 __u8 devtype = WIIMOTE_DEV_GENERIC;
817 __u16 vendor, product;
818 const char *name;
819
820 vendor = wdata->hdev->vendor;
821 product = wdata->hdev->product;
822 name = wdata->hdev->name;
823
824 if (exttype == WIIMOTE_EXT_BALANCE_BOARD) {
825 devtype = WIIMOTE_DEV_BALANCE_BOARD;
826 goto done;
827 } else if (exttype == WIIMOTE_EXT_PRO_CONTROLLER) {
828 devtype = WIIMOTE_DEV_PRO_CONTROLLER;
829 goto done;
830 }
831
832 if (!strcmp(name, "Nintendo RVL-CNT-01")) {
833 devtype = WIIMOTE_DEV_GEN10;
834 goto done;
835 } else if (!strcmp(name, "Nintendo RVL-CNT-01-TR")) {
836 devtype = WIIMOTE_DEV_GEN20;
837 goto done;
838 } else if (!strcmp(name, "Nintendo RVL-WBC-01")) {
839 devtype = WIIMOTE_DEV_BALANCE_BOARD;
840 goto done;
841 } else if (!strcmp(name, "Nintendo RVL-CNT-01-UC")) {
842 devtype = WIIMOTE_DEV_PRO_CONTROLLER;
843 goto done;
844 }
845
846 if (vendor == USB_VENDOR_ID_NINTENDO) {
847 if (product == USB_DEVICE_ID_NINTENDO_WIIMOTE) {
848 devtype = WIIMOTE_DEV_GEN10;
849 goto done;
850 } else if (product == USB_DEVICE_ID_NINTENDO_WIIMOTE2) {
851 devtype = WIIMOTE_DEV_GEN20;
852 goto done;
853 }
854 }
855
856done:
857 if (devtype == WIIMOTE_DEV_GENERIC)
858 hid_info(wdata->hdev, "cannot detect device; NAME: %s VID: %04x PID: %04x EXT: %04x\n",
859 name, vendor, product, exttype);
860 else
861 hid_info(wdata->hdev, "detected device: %s\n",
862 wiimote_devtype_names[devtype]);
863
864 wiimote_modules_load(wdata, devtype);
865}
866
867static void wiimote_init_detect(struct wiimote_data *wdata)
868{
869 __u8 exttype = WIIMOTE_EXT_NONE, extdata[6];
870 bool ext;
871 int ret;
872
873 wiimote_cmd_acquire_noint(wdata);
874
875 spin_lock_irq(lock: &wdata->state.lock);
876 wdata->state.devtype = WIIMOTE_DEV_UNKNOWN;
877 wiimote_cmd_set(wdata, cmd: WIIPROTO_REQ_SREQ, opt: 0);
878 wiiproto_req_status(wdata);
879 spin_unlock_irq(lock: &wdata->state.lock);
880
881 ret = wiimote_cmd_wait_noint(wdata);
882 if (ret)
883 goto out_release;
884
885 spin_lock_irq(lock: &wdata->state.lock);
886 ext = wdata->state.flags & WIIPROTO_FLAG_EXT_PLUGGED;
887 spin_unlock_irq(lock: &wdata->state.lock);
888
889 if (!ext)
890 goto out_release;
891
892 wiimote_cmd_init_ext(wdata);
893 exttype = wiimote_cmd_read_ext(wdata, rmem: extdata);
894
895out_release:
896 wiimote_cmd_release(wdata);
897 wiimote_init_set_type(wdata, exttype);
898
899 /* schedule MP timer */
900 spin_lock_irq(lock: &wdata->state.lock);
901 if (!(wdata->state.flags & WIIPROTO_FLAG_BUILTIN_MP) &&
902 !(wdata->state.flags & WIIPROTO_FLAG_NO_MP))
903 mod_timer(timer: &wdata->timer, expires: jiffies + HZ * 4);
904 spin_unlock_irq(lock: &wdata->state.lock);
905}
906
907/*
908 * MP hotplug events are not generated by the wiimote. Therefore, we need
909 * polling to detect it. We use a 4s interval for polling MP registers. This
910 * seems reasonable considering applications can trigger it manually via
911 * sysfs requests.
912 */
913static void wiimote_init_poll_mp(struct wiimote_data *wdata)
914{
915 bool mp;
916 __u8 mpdata[6];
917
918 wiimote_cmd_acquire_noint(wdata);
919 wiimote_cmd_init_mp(wdata);
920 mp = wiimote_cmd_read_mp(wdata, rmem: mpdata);
921 wiimote_cmd_release(wdata);
922
923 /* load/unload MP module if it changed */
924 if (mp) {
925 if (!wdata->state.mp) {
926 hid_info(wdata->hdev, "detected extension: Nintendo Wii Motion Plus\n");
927 wiimote_mp_load(wdata);
928 }
929 } else if (wdata->state.mp) {
930 wiimote_mp_unload(wdata);
931 }
932
933 mod_timer(timer: &wdata->timer, expires: jiffies + HZ * 4);
934}
935
936/*
937 * Check whether the wiimote is in the expected state. The extension registers
938 * may change during hotplug and initialization so we might get hotplug events
939 * that we caused by remapping some memory.
940 * We use some heuristics here to check known states. If the wiimote is in the
941 * expected state, we can ignore the hotplug event.
942 *
943 * Returns "true" if the device is in expected state, "false" if we should
944 * redo hotplug handling and extension initialization.
945 */
946static bool wiimote_init_check(struct wiimote_data *wdata)
947{
948 __u32 flags;
949 __u8 type, data[6];
950 bool ret, poll_mp;
951
952 spin_lock_irq(lock: &wdata->state.lock);
953 flags = wdata->state.flags;
954 spin_unlock_irq(lock: &wdata->state.lock);
955
956 wiimote_cmd_acquire_noint(wdata);
957
958 /* If MP is used and active, but the extension is not, we expect:
959 * read_mp_mapped() == WIIMOTE_MP_SINGLE
960 * state.flags == !EXT_ACTIVE && !MP_PLUGGED && MP_ACTIVE
961 * We do not check EXT_PLUGGED because it might change during
962 * initialization of MP without extensions.
963 * - If MP is unplugged/replugged, read_mp_mapped() fails
964 * - If EXT is plugged, MP_PLUGGED will get set */
965 if (wdata->state.exttype == WIIMOTE_EXT_NONE &&
966 wdata->state.mp > 0 && (flags & WIIPROTO_FLAG_MP_USED)) {
967 type = wiimote_cmd_read_mp_mapped(wdata);
968 ret = type == WIIMOTE_MP_SINGLE;
969
970 spin_lock_irq(lock: &wdata->state.lock);
971 ret = ret && !(wdata->state.flags & WIIPROTO_FLAG_EXT_ACTIVE);
972 ret = ret && !(wdata->state.flags & WIIPROTO_FLAG_MP_PLUGGED);
973 ret = ret && (wdata->state.flags & WIIPROTO_FLAG_MP_ACTIVE);
974 spin_unlock_irq(lock: &wdata->state.lock);
975
976 if (!ret)
977 hid_dbg(wdata->hdev, "state left: !EXT && MP\n");
978
979 /* while MP is mapped, we get EXT_PLUGGED events */
980 poll_mp = false;
981
982 goto out_release;
983 }
984
985 /* If MP is unused, but the extension port is used, we expect:
986 * read_ext == state.exttype
987 * state.flags == !MP_ACTIVE && EXT_ACTIVE
988 * - If MP is plugged/unplugged, our timer detects it
989 * - If EXT is unplugged/replugged, EXT_ACTIVE will become unset */
990 if (!(flags & WIIPROTO_FLAG_MP_USED) &&
991 wdata->state.exttype != WIIMOTE_EXT_NONE) {
992 type = wiimote_cmd_read_ext(wdata, rmem: data);
993 ret = type == wdata->state.exttype;
994
995 spin_lock_irq(lock: &wdata->state.lock);
996 ret = ret && !(wdata->state.flags & WIIPROTO_FLAG_MP_ACTIVE);
997 ret = ret && (wdata->state.flags & WIIPROTO_FLAG_EXT_ACTIVE);
998 spin_unlock_irq(lock: &wdata->state.lock);
999
1000 if (!ret)
1001 hid_dbg(wdata->hdev, "state left: EXT && !MP\n");
1002
1003 /* poll MP for hotplug events */
1004 poll_mp = true;
1005
1006 goto out_release;
1007 }
1008
1009 /* If neither MP nor an extension are used, we expect:
1010 * read_ext() == WIIMOTE_EXT_NONE
1011 * state.flags == !MP_ACTIVE && !EXT_ACTIVE && !EXT_PLUGGED
1012 * No need to perform any action in this case as everything is
1013 * disabled already.
1014 * - If MP is plugged/unplugged, our timer detects it
1015 * - If EXT is plugged, EXT_PLUGGED will be set */
1016 if (!(flags & WIIPROTO_FLAG_MP_USED) &&
1017 wdata->state.exttype == WIIMOTE_EXT_NONE) {
1018 type = wiimote_cmd_read_ext(wdata, rmem: data);
1019 ret = type == wdata->state.exttype;
1020
1021 spin_lock_irq(lock: &wdata->state.lock);
1022 ret = ret && !(wdata->state.flags & WIIPROTO_FLAG_EXT_ACTIVE);
1023 ret = ret && !(wdata->state.flags & WIIPROTO_FLAG_MP_ACTIVE);
1024 ret = ret && !(wdata->state.flags & WIIPROTO_FLAG_EXT_PLUGGED);
1025 spin_unlock_irq(lock: &wdata->state.lock);
1026
1027 if (!ret)
1028 hid_dbg(wdata->hdev, "state left: !EXT && !MP\n");
1029
1030 /* poll MP for hotplug events */
1031 poll_mp = true;
1032
1033 goto out_release;
1034 }
1035
1036 /* The trickiest part is if both EXT and MP are active. We cannot read
1037 * the EXT ID, anymore, because MP is mapped over it. However, we use
1038 * a handy trick here:
1039 * - EXT_ACTIVE is unset whenever !MP_PLUGGED is sent
1040 * MP_PLUGGED might be re-sent again before we are scheduled, but
1041 * EXT_ACTIVE will stay unset.
1042 * So it is enough to check for mp_mapped() and MP_ACTIVE and
1043 * EXT_ACTIVE. EXT_PLUGGED is a sanity check. */
1044 if (wdata->state.exttype != WIIMOTE_EXT_NONE &&
1045 wdata->state.mp > 0 && (flags & WIIPROTO_FLAG_MP_USED)) {
1046 type = wiimote_cmd_read_mp_mapped(wdata);
1047 ret = type != WIIMOTE_MP_NONE;
1048 ret = ret && type != WIIMOTE_MP_UNKNOWN;
1049 ret = ret && type != WIIMOTE_MP_SINGLE;
1050
1051 spin_lock_irq(lock: &wdata->state.lock);
1052 ret = ret && (wdata->state.flags & WIIPROTO_FLAG_EXT_PLUGGED);
1053 ret = ret && (wdata->state.flags & WIIPROTO_FLAG_EXT_ACTIVE);
1054 ret = ret && (wdata->state.flags & WIIPROTO_FLAG_MP_ACTIVE);
1055 spin_unlock_irq(lock: &wdata->state.lock);
1056
1057 if (!ret)
1058 hid_dbg(wdata->hdev, "state left: EXT && MP\n");
1059
1060 /* while MP is mapped, we get EXT_PLUGGED events */
1061 poll_mp = false;
1062
1063 goto out_release;
1064 }
1065
1066 /* unknown state */
1067 ret = false;
1068
1069out_release:
1070 wiimote_cmd_release(wdata);
1071
1072 /* only poll for MP if requested and if state didn't change */
1073 if (ret && poll_mp && !(flags & WIIPROTO_FLAG_BUILTIN_MP) &&
1074 !(flags & WIIPROTO_FLAG_NO_MP))
1075 wiimote_init_poll_mp(wdata);
1076
1077 return ret;
1078}
1079
1080static const char *wiimote_exttype_names[WIIMOTE_EXT_NUM] = {
1081 [WIIMOTE_EXT_NONE] = "None",
1082 [WIIMOTE_EXT_UNKNOWN] = "Unknown",
1083 [WIIMOTE_EXT_NUNCHUK] = "Nintendo Wii Nunchuk",
1084 [WIIMOTE_EXT_CLASSIC_CONTROLLER] = "Nintendo Wii Classic Controller",
1085 [WIIMOTE_EXT_BALANCE_BOARD] = "Nintendo Wii Balance Board",
1086 [WIIMOTE_EXT_PRO_CONTROLLER] = "Nintendo Wii U Pro Controller",
1087 [WIIMOTE_EXT_DRUMS] = "Nintendo Wii Drums",
1088 [WIIMOTE_EXT_GUITAR] = "Nintendo Wii Guitar",
1089 [WIIMOTE_EXT_TURNTABLE] = "Nintendo Wii Turntable"
1090};
1091
1092/*
1093 * Handle hotplug events
1094 * If we receive an hotplug event and the device-check failed, we deinitialize
1095 * the extension ports, re-read all extension IDs and set the device into
1096 * the desired state. This involves mapping MP into the main extension
1097 * registers, setting up extension passthrough modes and initializing the
1098 * requested extensions.
1099 */
1100static void wiimote_init_hotplug(struct wiimote_data *wdata)
1101{
1102 __u8 exttype, extdata[6], mpdata[6];
1103 __u32 flags;
1104 bool mp;
1105
1106 hid_dbg(wdata->hdev, "detect extensions..\n");
1107
1108 wiimote_cmd_acquire_noint(wdata);
1109
1110 spin_lock_irq(lock: &wdata->state.lock);
1111
1112 /* get state snapshot that we will then work on */
1113 flags = wdata->state.flags;
1114
1115 /* disable event forwarding temporarily */
1116 wdata->state.flags &= ~WIIPROTO_FLAG_EXT_ACTIVE;
1117 wdata->state.flags &= ~WIIPROTO_FLAG_MP_ACTIVE;
1118
1119 spin_unlock_irq(lock: &wdata->state.lock);
1120
1121 /* init extension and MP (deactivates current extension or MP) */
1122 wiimote_cmd_init_ext(wdata);
1123 if (flags & WIIPROTO_FLAG_NO_MP) {
1124 mp = false;
1125 } else {
1126 wiimote_cmd_init_mp(wdata);
1127 mp = wiimote_cmd_read_mp(wdata, rmem: mpdata);
1128 }
1129 exttype = wiimote_cmd_read_ext(wdata, rmem: extdata);
1130
1131 wiimote_cmd_release(wdata);
1132
1133 /* load/unload extension module if it changed */
1134 if (exttype != wdata->state.exttype) {
1135 /* unload previous extension */
1136 wiimote_ext_unload(wdata);
1137
1138 if (exttype == WIIMOTE_EXT_UNKNOWN) {
1139 hid_info(wdata->hdev, "cannot detect extension; %6phC\n",
1140 extdata);
1141 } else if (exttype == WIIMOTE_EXT_NONE) {
1142 spin_lock_irq(lock: &wdata->state.lock);
1143 wdata->state.exttype = WIIMOTE_EXT_NONE;
1144 spin_unlock_irq(lock: &wdata->state.lock);
1145 } else {
1146 hid_info(wdata->hdev, "detected extension: %s\n",
1147 wiimote_exttype_names[exttype]);
1148 /* try loading new extension */
1149 wiimote_ext_load(wdata, ext: exttype);
1150 }
1151 }
1152
1153 /* load/unload MP module if it changed */
1154 if (mp) {
1155 if (!wdata->state.mp) {
1156 hid_info(wdata->hdev, "detected extension: Nintendo Wii Motion Plus\n");
1157 wiimote_mp_load(wdata);
1158 }
1159 } else if (wdata->state.mp) {
1160 wiimote_mp_unload(wdata);
1161 }
1162
1163 /* if MP is not used, do not map or activate it */
1164 if (!(flags & WIIPROTO_FLAG_MP_USED))
1165 mp = false;
1166
1167 /* map MP into main extension registers if used */
1168 if (mp) {
1169 wiimote_cmd_acquire_noint(wdata);
1170 wiimote_cmd_map_mp(wdata, exttype);
1171 wiimote_cmd_release(wdata);
1172
1173 /* delete MP hotplug timer */
1174 timer_delete_sync(timer: &wdata->timer);
1175 } else {
1176 /* reschedule MP hotplug timer */
1177 if (!(flags & WIIPROTO_FLAG_BUILTIN_MP) &&
1178 !(flags & WIIPROTO_FLAG_NO_MP))
1179 mod_timer(timer: &wdata->timer, expires: jiffies + HZ * 4);
1180 }
1181
1182 spin_lock_irq(lock: &wdata->state.lock);
1183
1184 /* enable data forwarding again and set expected hotplug state */
1185 if (mp) {
1186 wdata->state.flags |= WIIPROTO_FLAG_MP_ACTIVE;
1187 if (wdata->state.exttype == WIIMOTE_EXT_NONE) {
1188 wdata->state.flags &= ~WIIPROTO_FLAG_EXT_PLUGGED;
1189 wdata->state.flags &= ~WIIPROTO_FLAG_MP_PLUGGED;
1190 } else {
1191 wdata->state.flags &= ~WIIPROTO_FLAG_EXT_PLUGGED;
1192 wdata->state.flags |= WIIPROTO_FLAG_MP_PLUGGED;
1193 wdata->state.flags |= WIIPROTO_FLAG_EXT_ACTIVE;
1194 }
1195 } else if (wdata->state.exttype != WIIMOTE_EXT_NONE) {
1196 wdata->state.flags |= WIIPROTO_FLAG_EXT_ACTIVE;
1197 }
1198
1199 /* request status report for hotplug state updates */
1200 wiiproto_req_status(wdata);
1201
1202 spin_unlock_irq(lock: &wdata->state.lock);
1203
1204 hid_dbg(wdata->hdev, "detected extensions: MP: %d EXT: %d\n",
1205 wdata->state.mp, wdata->state.exttype);
1206}
1207
1208static void wiimote_init_worker(struct work_struct *work)
1209{
1210 struct wiimote_data *wdata = container_of(work, struct wiimote_data,
1211 init_worker);
1212 bool changed = false;
1213
1214 if (wdata->state.devtype == WIIMOTE_DEV_PENDING) {
1215 wiimote_init_detect(wdata);
1216 changed = true;
1217 }
1218
1219 if (changed || !wiimote_init_check(wdata))
1220 wiimote_init_hotplug(wdata);
1221
1222 if (changed)
1223 kobject_uevent(kobj: &wdata->hdev->dev.kobj, action: KOBJ_CHANGE);
1224}
1225
1226void __wiimote_schedule(struct wiimote_data *wdata)
1227{
1228 if (!(wdata->state.flags & WIIPROTO_FLAG_EXITING))
1229 schedule_work(work: &wdata->init_worker);
1230}
1231
1232static void wiimote_schedule(struct wiimote_data *wdata)
1233{
1234 unsigned long flags;
1235
1236 spin_lock_irqsave(&wdata->state.lock, flags);
1237 __wiimote_schedule(wdata);
1238 spin_unlock_irqrestore(lock: &wdata->state.lock, flags);
1239}
1240
1241static void wiimote_init_timeout(struct timer_list *t)
1242{
1243 struct wiimote_data *wdata = timer_container_of(wdata, t, timer);
1244
1245 wiimote_schedule(wdata);
1246}
1247
1248/* protocol handlers */
1249
1250static void handler_keys(struct wiimote_data *wdata, const __u8 *payload)
1251{
1252 const __u8 *iter, *mods;
1253 const struct wiimod_ops *ops;
1254
1255 ops = wiimod_ext_table[wdata->state.exttype];
1256 if (ops->in_keys) {
1257 ops->in_keys(wdata, payload);
1258 return;
1259 }
1260
1261 mods = wiimote_devtype_mods[wdata->state.devtype];
1262 for (iter = mods; *iter != WIIMOD_NULL; ++iter) {
1263 ops = wiimod_table[*iter];
1264 if (ops->in_keys) {
1265 ops->in_keys(wdata, payload);
1266 break;
1267 }
1268 }
1269}
1270
1271static void handler_accel(struct wiimote_data *wdata, const __u8 *payload)
1272{
1273 const __u8 *iter, *mods;
1274 const struct wiimod_ops *ops;
1275
1276 ops = wiimod_ext_table[wdata->state.exttype];
1277 if (ops->in_accel) {
1278 ops->in_accel(wdata, payload);
1279 return;
1280 }
1281
1282 mods = wiimote_devtype_mods[wdata->state.devtype];
1283 for (iter = mods; *iter != WIIMOD_NULL; ++iter) {
1284 ops = wiimod_table[*iter];
1285 if (ops->in_accel) {
1286 ops->in_accel(wdata, payload);
1287 break;
1288 }
1289 }
1290}
1291
1292static bool valid_ext_handler(const struct wiimod_ops *ops, size_t len)
1293{
1294 if (!ops->in_ext)
1295 return false;
1296 if ((ops->flags & WIIMOD_FLAG_EXT8) && len < 8)
1297 return false;
1298 if ((ops->flags & WIIMOD_FLAG_EXT16) && len < 16)
1299 return false;
1300
1301 return true;
1302}
1303
1304static void handler_ext(struct wiimote_data *wdata, const __u8 *payload,
1305 size_t len)
1306{
1307 static const __u8 invalid[21] = { 0xff, 0xff, 0xff, 0xff,
1308 0xff, 0xff, 0xff, 0xff,
1309 0xff, 0xff, 0xff, 0xff,
1310 0xff, 0xff, 0xff, 0xff,
1311 0xff, 0xff, 0xff, 0xff,
1312 0xff };
1313 const __u8 *iter, *mods;
1314 const struct wiimod_ops *ops;
1315 bool is_mp;
1316
1317 if (len > 21)
1318 len = 21;
1319 if (len < 6 || !memcmp(p: payload, q: invalid, size: len))
1320 return;
1321
1322 /* if MP is active, track MP slot hotplugging */
1323 if (wdata->state.flags & WIIPROTO_FLAG_MP_ACTIVE) {
1324 /* this bit is set for invalid events (eg. during hotplug) */
1325 if (payload[5] & 0x01)
1326 return;
1327
1328 if (payload[4] & 0x01) {
1329 if (!(wdata->state.flags & WIIPROTO_FLAG_MP_PLUGGED)) {
1330 hid_dbg(wdata->hdev, "MP hotplug: 1\n");
1331 wdata->state.flags |= WIIPROTO_FLAG_MP_PLUGGED;
1332 __wiimote_schedule(wdata);
1333 }
1334 } else {
1335 if (wdata->state.flags & WIIPROTO_FLAG_MP_PLUGGED) {
1336 hid_dbg(wdata->hdev, "MP hotplug: 0\n");
1337 wdata->state.flags &= ~WIIPROTO_FLAG_MP_PLUGGED;
1338 wdata->state.flags &= ~WIIPROTO_FLAG_EXT_ACTIVE;
1339 __wiimote_schedule(wdata);
1340 }
1341 }
1342
1343 /* detect MP data that is sent interleaved with EXT data */
1344 is_mp = payload[5] & 0x02;
1345 } else {
1346 is_mp = false;
1347 }
1348
1349 /* ignore EXT events if no extension is active */
1350 if (!(wdata->state.flags & WIIPROTO_FLAG_EXT_ACTIVE) && !is_mp)
1351 return;
1352
1353 /* try forwarding to extension handler, first */
1354 ops = wiimod_ext_table[wdata->state.exttype];
1355 if (is_mp && ops->in_mp) {
1356 ops->in_mp(wdata, payload);
1357 return;
1358 } else if (!is_mp && valid_ext_handler(ops, len)) {
1359 ops->in_ext(wdata, payload);
1360 return;
1361 }
1362
1363 /* try forwarding to MP handler */
1364 ops = &wiimod_mp;
1365 if (is_mp && ops->in_mp) {
1366 ops->in_mp(wdata, payload);
1367 return;
1368 } else if (!is_mp && valid_ext_handler(ops, len)) {
1369 ops->in_ext(wdata, payload);
1370 return;
1371 }
1372
1373 /* try forwarding to loaded modules */
1374 mods = wiimote_devtype_mods[wdata->state.devtype];
1375 for (iter = mods; *iter != WIIMOD_NULL; ++iter) {
1376 ops = wiimod_table[*iter];
1377 if (is_mp && ops->in_mp) {
1378 ops->in_mp(wdata, payload);
1379 return;
1380 } else if (!is_mp && valid_ext_handler(ops, len)) {
1381 ops->in_ext(wdata, payload);
1382 return;
1383 }
1384 }
1385}
1386
1387#define ir_to_input0(wdata, ir, packed) handler_ir((wdata), (ir), (packed), 0)
1388#define ir_to_input1(wdata, ir, packed) handler_ir((wdata), (ir), (packed), 1)
1389#define ir_to_input2(wdata, ir, packed) handler_ir((wdata), (ir), (packed), 2)
1390#define ir_to_input3(wdata, ir, packed) handler_ir((wdata), (ir), (packed), 3)
1391
1392static void handler_ir(struct wiimote_data *wdata, const __u8 *payload,
1393 bool packed, unsigned int id)
1394{
1395 const __u8 *iter, *mods;
1396 const struct wiimod_ops *ops;
1397
1398 ops = wiimod_ext_table[wdata->state.exttype];
1399 if (ops->in_ir) {
1400 ops->in_ir(wdata, payload, packed, id);
1401 return;
1402 }
1403
1404 mods = wiimote_devtype_mods[wdata->state.devtype];
1405 for (iter = mods; *iter != WIIMOD_NULL; ++iter) {
1406 ops = wiimod_table[*iter];
1407 if (ops->in_ir) {
1408 ops->in_ir(wdata, payload, packed, id);
1409 break;
1410 }
1411 }
1412}
1413
1414/* reduced status report with "BB BB" key data only */
1415static void handler_status_K(struct wiimote_data *wdata,
1416 const __u8 *payload)
1417{
1418 handler_keys(wdata, payload);
1419
1420 /* on status reports the drm is reset so we need to resend the drm */
1421 wiiproto_req_drm(wdata, drm: WIIPROTO_REQ_NULL);
1422}
1423
1424/* extended status report with "BB BB LF 00 00 VV" data */
1425static void handler_status(struct wiimote_data *wdata, const __u8 *payload)
1426{
1427 handler_status_K(wdata, payload);
1428
1429 /* update extension status */
1430 if (payload[2] & 0x02) {
1431 if (!(wdata->state.flags & WIIPROTO_FLAG_EXT_PLUGGED)) {
1432 hid_dbg(wdata->hdev, "EXT hotplug: 1\n");
1433 wdata->state.flags |= WIIPROTO_FLAG_EXT_PLUGGED;
1434 __wiimote_schedule(wdata);
1435 }
1436 } else {
1437 if (wdata->state.flags & WIIPROTO_FLAG_EXT_PLUGGED) {
1438 hid_dbg(wdata->hdev, "EXT hotplug: 0\n");
1439 wdata->state.flags &= ~WIIPROTO_FLAG_EXT_PLUGGED;
1440 wdata->state.flags &= ~WIIPROTO_FLAG_MP_PLUGGED;
1441 wdata->state.flags &= ~WIIPROTO_FLAG_EXT_ACTIVE;
1442 wdata->state.flags &= ~WIIPROTO_FLAG_MP_ACTIVE;
1443 __wiimote_schedule(wdata);
1444 }
1445 }
1446
1447 wdata->state.cmd_battery = payload[5];
1448 if (wiimote_cmd_pending(wdata, cmd: WIIPROTO_REQ_SREQ, opt: 0))
1449 wiimote_cmd_complete(wdata);
1450}
1451
1452/* reduced generic report with "BB BB" key data only */
1453static void handler_generic_K(struct wiimote_data *wdata, const __u8 *payload)
1454{
1455 handler_keys(wdata, payload);
1456}
1457
1458static void handler_data(struct wiimote_data *wdata, const __u8 *payload)
1459{
1460 __u16 offset = payload[3] << 8 | payload[4];
1461 __u8 size = (payload[2] >> 4) + 1;
1462 __u8 err = payload[2] & 0x0f;
1463
1464 handler_keys(wdata, payload);
1465
1466 if (wiimote_cmd_pending(wdata, cmd: WIIPROTO_REQ_RMEM, opt: offset)) {
1467 if (err)
1468 size = 0;
1469 else if (size > wdata->state.cmd_read_size)
1470 size = wdata->state.cmd_read_size;
1471
1472 wdata->state.cmd_read_size = size;
1473 if (wdata->state.cmd_read_buf)
1474 memcpy(wdata->state.cmd_read_buf, &payload[5], size);
1475 wiimote_cmd_complete(wdata);
1476 }
1477}
1478
1479static void handler_return(struct wiimote_data *wdata, const __u8 *payload)
1480{
1481 __u8 err = payload[3];
1482 __u8 cmd = payload[2];
1483
1484 handler_keys(wdata, payload);
1485
1486 if (wiimote_cmd_pending(wdata, cmd, opt: 0)) {
1487 wdata->state.cmd_err = err;
1488 wiimote_cmd_complete(wdata);
1489 } else if (err) {
1490 hid_warn(wdata->hdev, "Remote error %u on req %u\n", err,
1491 cmd);
1492 }
1493}
1494
1495static void handler_drm_KA(struct wiimote_data *wdata, const __u8 *payload)
1496{
1497 handler_keys(wdata, payload);
1498 handler_accel(wdata, payload);
1499}
1500
1501static void handler_drm_KE(struct wiimote_data *wdata, const __u8 *payload)
1502{
1503 handler_keys(wdata, payload);
1504 handler_ext(wdata, payload: &payload[2], len: 8);
1505}
1506
1507static void handler_drm_KAI(struct wiimote_data *wdata, const __u8 *payload)
1508{
1509 handler_keys(wdata, payload);
1510 handler_accel(wdata, payload);
1511 ir_to_input0(wdata, &payload[5], false);
1512 ir_to_input1(wdata, &payload[8], false);
1513 ir_to_input2(wdata, &payload[11], false);
1514 ir_to_input3(wdata, &payload[14], false);
1515}
1516
1517static void handler_drm_KEE(struct wiimote_data *wdata, const __u8 *payload)
1518{
1519 handler_keys(wdata, payload);
1520 handler_ext(wdata, payload: &payload[2], len: 19);
1521}
1522
1523static void handler_drm_KIE(struct wiimote_data *wdata, const __u8 *payload)
1524{
1525 handler_keys(wdata, payload);
1526 ir_to_input0(wdata, &payload[2], false);
1527 ir_to_input1(wdata, &payload[4], true);
1528 ir_to_input2(wdata, &payload[7], false);
1529 ir_to_input3(wdata, &payload[9], true);
1530 handler_ext(wdata, payload: &payload[12], len: 9);
1531}
1532
1533static void handler_drm_KAE(struct wiimote_data *wdata, const __u8 *payload)
1534{
1535 handler_keys(wdata, payload);
1536 handler_accel(wdata, payload);
1537 handler_ext(wdata, payload: &payload[5], len: 16);
1538}
1539
1540static void handler_drm_KAIE(struct wiimote_data *wdata, const __u8 *payload)
1541{
1542 handler_keys(wdata, payload);
1543 handler_accel(wdata, payload);
1544 ir_to_input0(wdata, &payload[5], false);
1545 ir_to_input1(wdata, &payload[7], true);
1546 ir_to_input2(wdata, &payload[10], false);
1547 ir_to_input3(wdata, &payload[12], true);
1548 handler_ext(wdata, payload: &payload[15], len: 6);
1549}
1550
1551static void handler_drm_E(struct wiimote_data *wdata, const __u8 *payload)
1552{
1553 handler_ext(wdata, payload, len: 21);
1554}
1555
1556static void handler_drm_SKAI1(struct wiimote_data *wdata, const __u8 *payload)
1557{
1558 handler_keys(wdata, payload);
1559
1560 wdata->state.accel_split[0] = payload[2];
1561 wdata->state.accel_split[1] = (payload[0] >> 1) & (0x10 | 0x20);
1562 wdata->state.accel_split[1] |= (payload[1] << 1) & (0x40 | 0x80);
1563
1564 ir_to_input0(wdata, &payload[3], false);
1565 ir_to_input1(wdata, &payload[12], false);
1566}
1567
1568static void handler_drm_SKAI2(struct wiimote_data *wdata, const __u8 *payload)
1569{
1570 __u8 buf[5];
1571
1572 handler_keys(wdata, payload);
1573
1574 wdata->state.accel_split[1] |= (payload[0] >> 5) & (0x01 | 0x02);
1575 wdata->state.accel_split[1] |= (payload[1] >> 3) & (0x04 | 0x08);
1576
1577 buf[0] = 0;
1578 buf[1] = 0;
1579 buf[2] = wdata->state.accel_split[0];
1580 buf[3] = payload[2];
1581 buf[4] = wdata->state.accel_split[1];
1582 handler_accel(wdata, payload: buf);
1583
1584 ir_to_input2(wdata, &payload[3], false);
1585 ir_to_input3(wdata, &payload[12], false);
1586}
1587
1588struct wiiproto_handler {
1589 __u8 id;
1590 size_t size;
1591 void (*func)(struct wiimote_data *wdata, const __u8 *payload);
1592};
1593
1594static const struct wiiproto_handler handlers[] = {
1595 { .id = WIIPROTO_REQ_STATUS, .size = 6, .func = handler_status },
1596 { .id = WIIPROTO_REQ_STATUS, .size = 2, .func = handler_status_K },
1597 { .id = WIIPROTO_REQ_DATA, .size = 21, .func = handler_data },
1598 { .id = WIIPROTO_REQ_DATA, .size = 2, .func = handler_generic_K },
1599 { .id = WIIPROTO_REQ_RETURN, .size = 4, .func = handler_return },
1600 { .id = WIIPROTO_REQ_RETURN, .size = 2, .func = handler_generic_K },
1601 { .id = WIIPROTO_REQ_DRM_K, .size = 2, .func = handler_keys },
1602 { .id = WIIPROTO_REQ_DRM_KA, .size = 5, .func = handler_drm_KA },
1603 { .id = WIIPROTO_REQ_DRM_KA, .size = 2, .func = handler_generic_K },
1604 { .id = WIIPROTO_REQ_DRM_KE, .size = 10, .func = handler_drm_KE },
1605 { .id = WIIPROTO_REQ_DRM_KE, .size = 2, .func = handler_generic_K },
1606 { .id = WIIPROTO_REQ_DRM_KAI, .size = 17, .func = handler_drm_KAI },
1607 { .id = WIIPROTO_REQ_DRM_KAI, .size = 2, .func = handler_generic_K },
1608 { .id = WIIPROTO_REQ_DRM_KEE, .size = 21, .func = handler_drm_KEE },
1609 { .id = WIIPROTO_REQ_DRM_KEE, .size = 2, .func = handler_generic_K },
1610 { .id = WIIPROTO_REQ_DRM_KAE, .size = 21, .func = handler_drm_KAE },
1611 { .id = WIIPROTO_REQ_DRM_KAE, .size = 2, .func = handler_generic_K },
1612 { .id = WIIPROTO_REQ_DRM_KIE, .size = 21, .func = handler_drm_KIE },
1613 { .id = WIIPROTO_REQ_DRM_KIE, .size = 2, .func = handler_generic_K },
1614 { .id = WIIPROTO_REQ_DRM_KAIE, .size = 21, .func = handler_drm_KAIE },
1615 { .id = WIIPROTO_REQ_DRM_KAIE, .size = 2, .func = handler_generic_K },
1616 { .id = WIIPROTO_REQ_DRM_E, .size = 21, .func = handler_drm_E },
1617 { .id = WIIPROTO_REQ_DRM_SKAI1, .size = 21, .func = handler_drm_SKAI1 },
1618 { .id = WIIPROTO_REQ_DRM_SKAI2, .size = 21, .func = handler_drm_SKAI2 },
1619 { .id = 0 }
1620};
1621
1622static int wiimote_hid_event(struct hid_device *hdev, struct hid_report *report,
1623 u8 *raw_data, int size)
1624{
1625 struct wiimote_data *wdata = hid_get_drvdata(hdev);
1626 const struct wiiproto_handler *h;
1627 int i;
1628 unsigned long flags;
1629
1630 if (size < 1)
1631 return -EINVAL;
1632
1633 for (i = 0; handlers[i].id; ++i) {
1634 h = &handlers[i];
1635 if (h->id == raw_data[0] && h->size < size) {
1636 spin_lock_irqsave(&wdata->state.lock, flags);
1637 h->func(wdata, &raw_data[1]);
1638 spin_unlock_irqrestore(lock: &wdata->state.lock, flags);
1639 break;
1640 }
1641 }
1642
1643 if (!handlers[i].id)
1644 hid_warn(hdev, "Unhandled report %hhu size %d\n", raw_data[0],
1645 size);
1646
1647 return 0;
1648}
1649
1650static ssize_t wiimote_ext_show(struct device *dev,
1651 struct device_attribute *attr,
1652 char *buf)
1653{
1654 struct wiimote_data *wdata = dev_to_wii(dev);
1655 __u8 type;
1656 unsigned long flags;
1657
1658 spin_lock_irqsave(&wdata->state.lock, flags);
1659 type = wdata->state.exttype;
1660 spin_unlock_irqrestore(lock: &wdata->state.lock, flags);
1661
1662 switch (type) {
1663 case WIIMOTE_EXT_NONE:
1664 return sprintf(buf, fmt: "none\n");
1665 case WIIMOTE_EXT_NUNCHUK:
1666 return sprintf(buf, fmt: "nunchuk\n");
1667 case WIIMOTE_EXT_CLASSIC_CONTROLLER:
1668 return sprintf(buf, fmt: "classic\n");
1669 case WIIMOTE_EXT_BALANCE_BOARD:
1670 return sprintf(buf, fmt: "balanceboard\n");
1671 case WIIMOTE_EXT_PRO_CONTROLLER:
1672 return sprintf(buf, fmt: "procontroller\n");
1673 case WIIMOTE_EXT_DRUMS:
1674 return sprintf(buf, fmt: "drums\n");
1675 case WIIMOTE_EXT_GUITAR:
1676 return sprintf(buf, fmt: "guitar\n");
1677 case WIIMOTE_EXT_TURNTABLE:
1678 return sprintf(buf, fmt: "turntable\n");
1679 case WIIMOTE_EXT_UNKNOWN:
1680 default:
1681 return sprintf(buf, fmt: "unknown\n");
1682 }
1683}
1684
1685static ssize_t wiimote_ext_store(struct device *dev,
1686 struct device_attribute *attr,
1687 const char *buf, size_t count)
1688{
1689 struct wiimote_data *wdata = dev_to_wii(dev);
1690
1691 if (!strcmp(buf, "scan")) {
1692 wiimote_schedule(wdata);
1693 } else {
1694 return -EINVAL;
1695 }
1696
1697 return strnlen(p: buf, PAGE_SIZE);
1698}
1699
1700static DEVICE_ATTR(extension, S_IRUGO | S_IWUSR | S_IWGRP, wiimote_ext_show,
1701 wiimote_ext_store);
1702
1703static ssize_t wiimote_dev_show(struct device *dev,
1704 struct device_attribute *attr,
1705 char *buf)
1706{
1707 struct wiimote_data *wdata = dev_to_wii(dev);
1708 __u8 type;
1709 unsigned long flags;
1710
1711 spin_lock_irqsave(&wdata->state.lock, flags);
1712 type = wdata->state.devtype;
1713 spin_unlock_irqrestore(lock: &wdata->state.lock, flags);
1714
1715 switch (type) {
1716 case WIIMOTE_DEV_GENERIC:
1717 return sprintf(buf, fmt: "generic\n");
1718 case WIIMOTE_DEV_GEN10:
1719 return sprintf(buf, fmt: "gen10\n");
1720 case WIIMOTE_DEV_GEN20:
1721 return sprintf(buf, fmt: "gen20\n");
1722 case WIIMOTE_DEV_BALANCE_BOARD:
1723 return sprintf(buf, fmt: "balanceboard\n");
1724 case WIIMOTE_DEV_PRO_CONTROLLER:
1725 return sprintf(buf, fmt: "procontroller\n");
1726 case WIIMOTE_DEV_PENDING:
1727 return sprintf(buf, fmt: "pending\n");
1728 case WIIMOTE_DEV_UNKNOWN:
1729 default:
1730 return sprintf(buf, fmt: "unknown\n");
1731 }
1732}
1733
1734static DEVICE_ATTR(devtype, S_IRUGO, wiimote_dev_show, NULL);
1735
1736static struct wiimote_data *wiimote_create(struct hid_device *hdev)
1737{
1738 struct wiimote_data *wdata;
1739
1740 wdata = kzalloc(sizeof(*wdata), GFP_KERNEL);
1741 if (!wdata)
1742 return NULL;
1743
1744 wdata->hdev = hdev;
1745 hid_set_drvdata(hdev, data: wdata);
1746
1747 spin_lock_init(&wdata->queue.lock);
1748 INIT_WORK(&wdata->queue.worker, wiimote_queue_worker);
1749
1750 spin_lock_init(&wdata->state.lock);
1751 init_completion(x: &wdata->state.ready);
1752 mutex_init(&wdata->state.sync);
1753 wdata->state.drm = WIIPROTO_REQ_DRM_K;
1754 wdata->state.cmd_battery = 0xff;
1755
1756 INIT_WORK(&wdata->init_worker, wiimote_init_worker);
1757 timer_setup(&wdata->timer, wiimote_init_timeout, 0);
1758
1759 return wdata;
1760}
1761
1762static void wiimote_destroy(struct wiimote_data *wdata)
1763{
1764 unsigned long flags;
1765
1766 wiidebug_deinit(wdata);
1767
1768 /* prevent init_worker from being scheduled again */
1769 spin_lock_irqsave(&wdata->state.lock, flags);
1770 wdata->state.flags |= WIIPROTO_FLAG_EXITING;
1771 spin_unlock_irqrestore(lock: &wdata->state.lock, flags);
1772
1773 cancel_work_sync(work: &wdata->init_worker);
1774 timer_shutdown_sync(timer: &wdata->timer);
1775
1776 device_remove_file(dev: &wdata->hdev->dev, attr: &dev_attr_devtype);
1777 device_remove_file(dev: &wdata->hdev->dev, attr: &dev_attr_extension);
1778
1779 wiimote_mp_unload(wdata);
1780 wiimote_ext_unload(wdata);
1781 wiimote_modules_unload(wdata);
1782 cancel_work_sync(work: &wdata->queue.worker);
1783 hid_hw_close(hdev: wdata->hdev);
1784 hid_hw_stop(hdev: wdata->hdev);
1785
1786 kfree(objp: wdata);
1787}
1788
1789static int wiimote_hid_probe(struct hid_device *hdev,
1790 const struct hid_device_id *id)
1791{
1792 struct wiimote_data *wdata;
1793 int ret;
1794
1795 hdev->quirks |= HID_QUIRK_NO_INIT_REPORTS;
1796
1797 wdata = wiimote_create(hdev);
1798 if (!wdata) {
1799 hid_err(hdev, "Can't alloc device\n");
1800 return -ENOMEM;
1801 }
1802
1803 ret = hid_parse(hdev);
1804 if (ret) {
1805 hid_err(hdev, "HID parse failed\n");
1806 goto err;
1807 }
1808
1809 ret = hid_hw_start(hdev, HID_CONNECT_HIDRAW);
1810 if (ret) {
1811 hid_err(hdev, "HW start failed\n");
1812 goto err;
1813 }
1814
1815 ret = hid_hw_open(hdev);
1816 if (ret) {
1817 hid_err(hdev, "cannot start hardware I/O\n");
1818 goto err_stop;
1819 }
1820
1821 ret = device_create_file(device: &hdev->dev, entry: &dev_attr_extension);
1822 if (ret) {
1823 hid_err(hdev, "cannot create sysfs attribute\n");
1824 goto err_close;
1825 }
1826
1827 ret = device_create_file(device: &hdev->dev, entry: &dev_attr_devtype);
1828 if (ret) {
1829 hid_err(hdev, "cannot create sysfs attribute\n");
1830 goto err_ext;
1831 }
1832
1833 ret = wiidebug_init(wdata);
1834 if (ret)
1835 goto err_free;
1836
1837 hid_info(hdev, "New device registered\n");
1838
1839 /* schedule device detection */
1840 wiimote_schedule(wdata);
1841
1842 return 0;
1843
1844err_free:
1845 wiimote_destroy(wdata);
1846 return ret;
1847
1848err_ext:
1849 device_remove_file(dev: &wdata->hdev->dev, attr: &dev_attr_extension);
1850err_close:
1851 hid_hw_close(hdev);
1852err_stop:
1853 hid_hw_stop(hdev);
1854err:
1855 input_free_device(dev: wdata->ir);
1856 input_free_device(dev: wdata->accel);
1857 kfree(objp: wdata);
1858 return ret;
1859}
1860
1861static void wiimote_hid_remove(struct hid_device *hdev)
1862{
1863 struct wiimote_data *wdata = hid_get_drvdata(hdev);
1864
1865 hid_info(hdev, "Device removed\n");
1866 wiimote_destroy(wdata);
1867}
1868
1869static const struct hid_device_id wiimote_hid_devices[] = {
1870 { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_NINTENDO,
1871 USB_DEVICE_ID_NINTENDO_WIIMOTE) },
1872 { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_NINTENDO,
1873 USB_DEVICE_ID_NINTENDO_WIIMOTE2) },
1874 { }
1875};
1876
1877bool wiimote_dpad_as_analog = false;
1878module_param_named(dpad_as_analog, wiimote_dpad_as_analog, bool, 0644);
1879MODULE_PARM_DESC(dpad_as_analog, "Use D-Pad as main analog input");
1880
1881MODULE_DEVICE_TABLE(hid, wiimote_hid_devices);
1882
1883static struct hid_driver wiimote_hid_driver = {
1884 .name = "wiimote",
1885 .id_table = wiimote_hid_devices,
1886 .probe = wiimote_hid_probe,
1887 .remove = wiimote_hid_remove,
1888 .raw_event = wiimote_hid_event,
1889};
1890module_hid_driver(wiimote_hid_driver);
1891
1892MODULE_LICENSE("GPL");
1893MODULE_AUTHOR("David Herrmann <dh.herrmann@gmail.com>");
1894MODULE_DESCRIPTION("Driver for Nintendo Wii / Wii U peripherals");
1895

source code of linux/drivers/hid/hid-wiimote-core.c