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