drivers/hid/hid-wiimote-core.c

   1 /*
   2  * HID driver for Nintendo Wii / Wii U peripherals
   3  * Copyright (c) 2011-2013 David Herrmann <dh.herrmann@gmail.com>
   4  */
   5
   6 /*
   7  * This program is free software; you can redistribute it and/or modify it
   8  * under the terms of the GNU General Public License as published by the Free
   9  * Software Foundation; either version 2 of the License, or (at your option)
  10  * any later version.
  11  */
  12
  13 #include <linux/completion.h>
  14 #include <linux/device.h>
  15 #include <linux/hid.h>
  16 #include <linux/input.h>
  17 #include <linux/module.h>
  18 #include <linux/mutex.h>
  19 #include <linux/spinlock.h>
  20 #include "hid-ids.h"
  21 #include "hid-wiimote.h"
  22
  23 /* output queue handling */
  24
  25 static int wiimote_hid_send(struct hid_device *hdev, __u8 *buffer,
  26                             size_t count)
  27 {
  28         __u8 *buf;
  29         int ret;
  30
  31         if (!hdev->hid_output_raw_report)
  32                 return -ENODEV;
  33
  34         buf = kmemdup(buffer, count, GFP_KERNEL);
  35         if (!buf)
  36                 return -ENOMEM;
  37
  38         ret = hdev->hid_output_raw_report(hdev, buf, count, HID_OUTPUT_REPORT);
  39
  40         kfree(buf);
  41         return ret;
  42 }
  43
  44 static void wiimote_queue_worker(struct work_struct *work)
  45 {
  46         struct wiimote_queue *queue = container_of(work, struct wiimote_queue,
  47                                                    worker);
  48         struct wiimote_data *wdata = container_of(queue, struct wiimote_data,
  49                                                   queue);
  50         unsigned long flags;
  51         int ret;
  52
  53         spin_lock_irqsave(&wdata->queue.lock, flags);
  54
  55         while (wdata->queue.head != wdata->queue.tail) {
  56                 spin_unlock_irqrestore(&wdata->queue.lock, flags);
  57                 ret = wiimote_hid_send(wdata->hdev,
  58                                  wdata->queue.outq[wdata->queue.tail].data,
  59                                  wdata->queue.outq[wdata->queue.tail].size);
  60                 if (ret < 0) {
  61                         spin_lock_irqsave(&wdata->state.lock, flags);
  62                         wiimote_cmd_abort(wdata);
  63                         spin_unlock_irqrestore(&wdata->state.lock, flags);
  64                 }
  65                 spin_lock_irqsave(&wdata->queue.lock, flags);
  66
  67                 wdata->queue.tail = (wdata->queue.tail + 1) % WIIMOTE_BUFSIZE;
  68         }
  69
  70         spin_unlock_irqrestore(&wdata->queue.lock, flags);
  71 }
  72
  73 static void wiimote_queue(struct wiimote_data *wdata, const __u8 *buffer,
  74                                                                 size_t count)
  75 {
  76         unsigned long flags;
  77         __u8 newhead;
  78
  79         if (count > HID_MAX_BUFFER_SIZE) {
  80                 hid_warn(wdata->hdev, "Sending too large output report\n");
  81
  82                 spin_lock_irqsave(&wdata->queue.lock, flags);
  83                 goto out_error;
  84         }
  85
  86         /*
  87          * Copy new request into our output queue and check whether the
  88          * queue is full. If it is full, discard this request.
  89          * If it is empty we need to start a new worker that will
  90          * send out the buffer to the hid device.
  91          * If the queue is not empty, then there must be a worker
  92          * that is currently sending out our buffer and this worker
  93          * will reschedule itself until the queue is empty.
  94          */
  95
  96         spin_lock_irqsave(&wdata->queue.lock, flags);
  97
  98         memcpy(wdata->queue.outq[wdata->queue.head].data, buffer, count);
  99         wdata->queue.outq[wdata->queue.head].size = count;
 100         newhead = (wdata->queue.head + 1) % WIIMOTE_BUFSIZE;
 101
 102         if (wdata->queue.head == wdata->queue.tail) {
 103                 wdata->queue.head = newhead;
 104                 schedule_work(&wdata->queue.worker);
 105         } else if (newhead != wdata->queue.tail) {
 106                 wdata->queue.head = newhead;
 107         } else {
 108                 hid_warn(wdata->hdev, "Output queue is full");
 109                 goto out_error;
 110         }
 111
 112         goto out_unlock;
 113
 114 out_error:
 115         wiimote_cmd_abort(wdata);
 116 out_unlock:
 117         spin_unlock_irqrestore(&wdata->queue.lock, flags);
 118 }
 119
 120 /*
 121  * This sets the rumble bit on the given output report if rumble is
 122  * currently enabled.
 123  * \cmd1 must point to the second byte in the output report => &cmd[1]
 124  * This must be called on nearly every output report before passing it
 125  * into the output queue!
 126  */
 127 static inline void wiiproto_keep_rumble(struct wiimote_data *wdata, __u8 *cmd1)
 128 {
 129         if (wdata->state.flags & WIIPROTO_FLAG_RUMBLE)
 130                 *cmd1 |= 0x01;
 131 }
 132
 133 void wiiproto_req_rumble(struct wiimote_data *wdata, __u8 rumble)
 134 {
 135         __u8 cmd[2];
 136
 137         rumble = !!rumble;
 138         if (rumble == !!(wdata->state.flags & WIIPROTO_FLAG_RUMBLE))
 139                 return;
 140
 141         if (rumble)
 142                 wdata->state.flags |= WIIPROTO_FLAG_RUMBLE;
 143         else
 144                 wdata->state.flags &= ~WIIPROTO_FLAG_RUMBLE;
 145
 146         cmd[0] = WIIPROTO_REQ_RUMBLE;
 147         cmd[1] = 0;
 148
 149         wiiproto_keep_rumble(wdata, &cmd[1]);
 150         wiimote_queue(wdata, cmd, sizeof(cmd));
 151 }
 152
 153 void wiiproto_req_leds(struct wiimote_data *wdata, int leds)
 154 {
 155         __u8 cmd[2];
 156
 157         leds &= WIIPROTO_FLAGS_LEDS;
 158         if ((wdata->state.flags & WIIPROTO_FLAGS_LEDS) == leds)
 159                 return;
 160         wdata->state.flags = (wdata->state.flags & ~WIIPROTO_FLAGS_LEDS) | leds;
 161
 162         cmd[0] = WIIPROTO_REQ_LED;
 163         cmd[1] = 0;
 164
 165         if (leds & WIIPROTO_FLAG_LED1)
 166                 cmd[1] |= 0x10;
 167         if (leds & WIIPROTO_FLAG_LED2)
 168                 cmd[1] |= 0x20;
 169         if (leds & WIIPROTO_FLAG_LED3)
 170                 cmd[1] |= 0x40;
 171         if (leds & WIIPROTO_FLAG_LED4)
 172                 cmd[1] |= 0x80;
 173
 174         wiiproto_keep_rumble(wdata, &cmd[1]);
 175         wiimote_queue(wdata, cmd, sizeof(cmd));
 176 }
 177
 178 /*
 179  * Check what peripherals of the wiimote are currently
 180  * active and select a proper DRM that supports all of
 181  * the requested data inputs.
 182  *
 183  * Not all combinations are actually supported. The following
 184  * combinations work only with limitations:
 185  *  - IR cam in extended or full mode disables any data transmission
 186  *    of extension controllers. There is no DRM mode that supports
 187  *    extension bytes plus extended/full IR.
 188  *  - IR cam with accelerometer and extension *_EXT8 is not supported.
 189  *    However, all extensions that need *_EXT8 are devices that don't
 190  *    support IR cameras. Hence, this shouldn't happen under normal
 191  *    operation.
 192  *  - *_EXT16 is only supported in combination with buttons and
 193  *    accelerometer. No IR or similar can be active simultaneously. As
 194  *    above, all modules that require it are mutually exclusive with
 195  *    IR/etc. so this doesn't matter.
 196  */
 197 static __u8 select_drm(struct wiimote_data *wdata)
 198 {
 199         __u8 ir = wdata->state.flags & WIIPROTO_FLAGS_IR;
 200         bool ext;
 201
 202         ext = (wdata->state.flags & WIIPROTO_FLAG_EXT_USED) ||
 203               (wdata->state.flags & WIIPROTO_FLAG_MP_USED);
 204
 205         /* some 3rd-party balance-boards are hard-coded to KEE, *sigh* */
 206         if (wdata->state.devtype == WIIMOTE_DEV_BALANCE_BOARD) {
 207                 if (ext)
 208                         return WIIPROTO_REQ_DRM_KEE;
 209                 else
 210                         return WIIPROTO_REQ_DRM_K;
 211         }
 212
 213         if (ir == WIIPROTO_FLAG_IR_BASIC) {
 214                 if (wdata->state.flags & WIIPROTO_FLAG_ACCEL) {
 215                         if (ext)
 216                                 return WIIPROTO_REQ_DRM_KAIE;
 217                         else
 218                                 return WIIPROTO_REQ_DRM_KAI;
 219                 } else {
 220                         return WIIPROTO_REQ_DRM_KIE;
 221                 }
 222         } else if (ir == WIIPROTO_FLAG_IR_EXT) {
 223                 return WIIPROTO_REQ_DRM_KAI;
 224         } else if (ir == WIIPROTO_FLAG_IR_FULL) {
 225                 return WIIPROTO_REQ_DRM_SKAI1;
 226         } else {
 227                 if (wdata->state.flags & WIIPROTO_FLAG_ACCEL) {
 228                         if (ext)
 229                                 return WIIPROTO_REQ_DRM_KAE;
 230                         else
 231                                 return WIIPROTO_REQ_DRM_KA;
 232                 } else {
 233                         if (ext)
 234                                 return WIIPROTO_REQ_DRM_KEE;
 235                         else
 236                                 return WIIPROTO_REQ_DRM_K;
 237                 }
 238         }
 239 }
 240
 241 void wiiproto_req_drm(struct wiimote_data *wdata, __u8 drm)
 242 {
 243         __u8 cmd[3];
 244
 245         if (wdata->state.flags & WIIPROTO_FLAG_DRM_LOCKED)
 246                 drm = wdata->state.drm;
 247         else if (drm == WIIPROTO_REQ_NULL)
 248                 drm = select_drm(wdata);
 249
 250         cmd[0] = WIIPROTO_REQ_DRM;
 251         cmd[1] = 0;
 252         cmd[2] = drm;
 253
 254         wdata->state.drm = drm;
 255         wiiproto_keep_rumble(wdata, &cmd[1]);
 256         wiimote_queue(wdata, cmd, sizeof(cmd));
 257 }
 258
 259 void wiiproto_req_status(struct wiimote_data *wdata)
 260 {
 261         __u8 cmd[2];
 262
 263         cmd[0] = WIIPROTO_REQ_SREQ;
 264         cmd[1] = 0;
 265
 266         wiiproto_keep_rumble(wdata, &cmd[1]);
 267         wiimote_queue(wdata, cmd, sizeof(cmd));
 268 }
 269
 270 void wiiproto_req_accel(struct wiimote_data *wdata, __u8 accel)
 271 {
 272         accel = !!accel;
 273         if (accel == !!(wdata->state.flags & WIIPROTO_FLAG_ACCEL))
 274                 return;
 275
 276         if (accel)
 277                 wdata->state.flags |= WIIPROTO_FLAG_ACCEL;
 278         else
 279                 wdata->state.flags &= ~WIIPROTO_FLAG_ACCEL;
 280
 281         wiiproto_req_drm(wdata, WIIPROTO_REQ_NULL);
 282 }
 283
 284 void wiiproto_req_ir1(struct wiimote_data *wdata, __u8 flags)
 285 {
 286         __u8 cmd[2];
 287
 288         cmd[0] = WIIPROTO_REQ_IR1;
 289         cmd[1] = flags;
 290
 291         wiiproto_keep_rumble(wdata, &cmd[1]);
 292         wiimote_queue(wdata, cmd, sizeof(cmd));
 293 }
 294
 295 void wiiproto_req_ir2(struct wiimote_data *wdata, __u8 flags)
 296 {
 297         __u8 cmd[2];
 298
 299         cmd[0] = WIIPROTO_REQ_IR2;
 300         cmd[1] = flags;
 301
 302         wiiproto_keep_rumble(wdata, &cmd[1]);
 303         wiimote_queue(wdata, cmd, sizeof(cmd));
 304 }
 305
 306 #define wiiproto_req_wreg(wdata, os, buf, sz) \
 307                         wiiproto_req_wmem((wdata), false, (os), (buf), (sz))
 308
 309 #define wiiproto_req_weeprom(wdata, os, buf, sz) \
 310                         wiiproto_req_wmem((wdata), true, (os), (buf), (sz))
 311
 312 static void wiiproto_req_wmem(struct wiimote_data *wdata, bool eeprom,
 313                                 __u32 offset, const __u8 *buf, __u8 size)
 314 {
 315         __u8 cmd[22];
 316
 317         if (size > 16 || size == 0) {
 318                 hid_warn(wdata->hdev, "Invalid length %d wmem request\n", size);
 319                 return;
 320         }
 321
 322         memset(cmd, 0, sizeof(cmd));
 323         cmd[0] = WIIPROTO_REQ_WMEM;
 324         cmd[2] = (offset >> 16) & 0xff;
 325         cmd[3] = (offset >> 8) & 0xff;
 326         cmd[4] = offset & 0xff;
 327         cmd[5] = size;
 328         memcpy(&cmd[6], buf, size);
 329
 330         if (!eeprom)
 331                 cmd[1] |= 0x04;
 332
 333         wiiproto_keep_rumble(wdata, &cmd[1]);
 334         wiimote_queue(wdata, cmd, sizeof(cmd));
 335 }
 336
 337 void wiiproto_req_rmem(struct wiimote_data *wdata, bool eeprom, __u32 offset,
 338                                                                 __u16 size)
 339 {
 340         __u8 cmd[7];
 341
 342         if (size == 0) {
 343                 hid_warn(wdata->hdev, "Invalid length %d rmem request\n", size);
 344                 return;
 345         }
 346
 347         cmd[0] = WIIPROTO_REQ_RMEM;
 348         cmd[1] = 0;
 349         cmd[2] = (offset >> 16) & 0xff;
 350         cmd[3] = (offset >> 8) & 0xff;
 351         cmd[4] = offset & 0xff;
 352         cmd[5] = (size >> 8) & 0xff;
 353         cmd[6] = size & 0xff;
 354
 355         if (!eeprom)
 356                 cmd[1] |= 0x04;
 357
 358         wiiproto_keep_rumble(wdata, &cmd[1]);
 359         wiimote_queue(wdata, cmd, sizeof(cmd));
 360 }
 361
 362 /* requries the cmd-mutex to be held */
 363 int wiimote_cmd_write(struct wiimote_data *wdata, __u32 offset,
 364                                                 const __u8 *wmem, __u8 size)
 365 {
 366         unsigned long flags;
 367         int ret;
 368
 369         spin_lock_irqsave(&wdata->state.lock, flags);
 370         wiimote_cmd_set(wdata, WIIPROTO_REQ_WMEM, 0);
 371         wiiproto_req_wreg(wdata, offset, wmem, size);
 372         spin_unlock_irqrestore(&wdata->state.lock, flags);
 373
 374         ret = wiimote_cmd_wait(wdata);
 375         if (!ret && wdata->state.cmd_err)
 376                 ret = -EIO;
 377
 378         return ret;
 379 }
 380
 381 /* requries the cmd-mutex to be held */
 382 ssize_t wiimote_cmd_read(struct wiimote_data *wdata, __u32 offset, __u8 *rmem,
 383                                                                 __u8 size)
 384 {
 385         unsigned long flags;
 386         ssize_t ret;
 387
 388         spin_lock_irqsave(&wdata->state.lock, flags);
 389         wdata->state.cmd_read_size = size;
 390         wdata->state.cmd_read_buf = rmem;
 391         wiimote_cmd_set(wdata, WIIPROTO_REQ_RMEM, offset & 0xffff);
 392         wiiproto_req_rreg(wdata, offset, size);
 393         spin_unlock_irqrestore(&wdata->state.lock, flags);
 394
 395         ret = wiimote_cmd_wait(wdata);
 396
 397         spin_lock_irqsave(&wdata->state.lock, flags);
 398         wdata->state.cmd_read_buf = NULL;
 399         spin_unlock_irqrestore(&wdata->state.lock, flags);
 400
 401         if (!ret) {
 402                 if (wdata->state.cmd_read_size == 0)
 403                         ret = -EIO;
 404                 else
 405                         ret = wdata->state.cmd_read_size;
 406         }
 407
 408         return ret;
 409 }
 410
 411 /* requires the cmd-mutex to be held */
 412 static int wiimote_cmd_init_ext(struct wiimote_data *wdata)
 413 {
 414         __u8 wmem;
 415         int ret;
 416
 417         /* initialize extension */
 418         wmem = 0x55;
 419         ret = wiimote_cmd_write(wdata, 0xa400f0, &wmem, sizeof(wmem));
 420         if (ret)
 421                 return ret;
 422
 423         /* disable default encryption */
 424         wmem = 0x0;
 425         ret = wiimote_cmd_write(wdata, 0xa400fb, &wmem, sizeof(wmem));
 426         if (ret)
 427                 return ret;
 428
 429         return 0;
 430 }
 431
 432 /* requires the cmd-mutex to be held */
 433 static __u8 wiimote_cmd_read_ext(struct wiimote_data *wdata, __u8 *rmem)
 434 {
 435         int ret;
 436
 437         /* read extension ID */
 438         ret = wiimote_cmd_read(wdata, 0xa400fa, rmem, 6);
 439         if (ret != 6)
 440                 return WIIMOTE_EXT_NONE;
 441
 442         hid_dbg(wdata->hdev, "extension ID: %02x:%02x %02x:%02x %02x:%02x\n",
 443                 rmem[0], rmem[1], rmem[2], rmem[3], rmem[4], rmem[5]);
 444
 445         if (rmem[0] == 0xff && rmem[1] == 0xff && rmem[2] == 0xff &&
 446             rmem[3] == 0xff && rmem[4] == 0xff && rmem[5] == 0xff)
 447                 return WIIMOTE_EXT_NONE;
 448
 449         if (rmem[4] == 0x00 && rmem[5] == 0x00)
 450                 return WIIMOTE_EXT_NUNCHUK;
 451         if (rmem[4] == 0x01 && rmem[5] == 0x01)
 452                 return WIIMOTE_EXT_CLASSIC_CONTROLLER;
 453         if (rmem[4] == 0x04 && rmem[5] == 0x02)
 454                 return WIIMOTE_EXT_BALANCE_BOARD;
 455
 456         return WIIMOTE_EXT_UNKNOWN;
 457 }
 458
 459 /* requires the cmd-mutex to be held */
 460 static int wiimote_cmd_init_mp(struct wiimote_data *wdata)
 461 {
 462         __u8 wmem;
 463         int ret;
 464
 465         /* initialize MP */
 466         wmem = 0x55;
 467         ret = wiimote_cmd_write(wdata, 0xa600f0, &wmem, sizeof(wmem));
 468         if (ret)
 469                 return ret;
 470
 471         /* disable default encryption */
 472         wmem = 0x0;
 473         ret = wiimote_cmd_write(wdata, 0xa600fb, &wmem, sizeof(wmem));
 474         if (ret)
 475                 return ret;
 476
 477         return 0;
 478 }
 479
 480 /* requires the cmd-mutex to be held */
 481 static bool wiimote_cmd_map_mp(struct wiimote_data *wdata, __u8 exttype)
 482 {
 483         __u8 wmem;
 484
 485         /* map MP with correct pass-through mode */
 486         switch (exttype) {
 487         case WIIMOTE_EXT_CLASSIC_CONTROLLER:
 488                 wmem = 0x07;
 489                 break;
 490         case WIIMOTE_EXT_NUNCHUK:
 491                 wmem = 0x05;
 492                 break;
 493         default:
 494                 wmem = 0x04;
 495                 break;
 496         }
 497
 498         return wiimote_cmd_write(wdata, 0xa600fe, &wmem, sizeof(wmem));
 499 }
 500
 501 /* requires the cmd-mutex to be held */
 502 static bool wiimote_cmd_read_mp(struct wiimote_data *wdata, __u8 *rmem)
 503 {
 504         int ret;
 505
 506         /* read motion plus ID */
 507         ret = wiimote_cmd_read(wdata, 0xa600fa, rmem, 6);
 508         if (ret != 6)
 509                 return false;
 510
 511         hid_dbg(wdata->hdev, "motion plus ID: %02x:%02x %02x:%02x %02x:%02x\n",
 512                 rmem[0], rmem[1], rmem[2], rmem[3], rmem[4], rmem[5]);
 513
 514         if (rmem[5] == 0x05)
 515                 return true;
 516
 517         hid_info(wdata->hdev, "unknown motion plus ID: %02x:%02x %02x:%02x %02x:%02x\n",
 518                  rmem[0], rmem[1], rmem[2], rmem[3], rmem[4], rmem[5]);
 519
 520         return false;
 521 }
 522
 523 /* requires the cmd-mutex to be held */
 524 static __u8 wiimote_cmd_read_mp_mapped(struct wiimote_data *wdata)
 525 {
 526         int ret;
 527         __u8 rmem[6];
 528
 529         /* read motion plus ID */
 530         ret = wiimote_cmd_read(wdata, 0xa400fa, rmem, 6);
 531         if (ret != 6)
 532                 return WIIMOTE_MP_NONE;
 533
 534         hid_dbg(wdata->hdev, "mapped motion plus ID: %02x:%02x %02x:%02x %02x:%02x\n",
 535                 rmem[0], rmem[1], rmem[2], rmem[3], rmem[4], rmem[5]);
 536
 537         if (rmem[0] == 0xff && rmem[1] == 0xff && rmem[2] == 0xff &&
 538             rmem[3] == 0xff && rmem[4] == 0xff && rmem[5] == 0xff)
 539                 return WIIMOTE_MP_NONE;
 540
 541         if (rmem[4] == 0x04 && rmem[5] == 0x05)
 542                 return WIIMOTE_MP_SINGLE;
 543         else if (rmem[4] == 0x05 && rmem[5] == 0x05)
 544                 return WIIMOTE_MP_PASSTHROUGH_NUNCHUK;
 545         else if (rmem[4] == 0x07 && rmem[5] == 0x05)
 546                 return WIIMOTE_MP_PASSTHROUGH_CLASSIC;
 547
 548         return WIIMOTE_MP_UNKNOWN;
 549 }
 550
 551 /* device module handling */
 552
 553 static const __u8 * const wiimote_devtype_mods[WIIMOTE_DEV_NUM] = {
 554         [WIIMOTE_DEV_PENDING] = (const __u8[]){
 555                 WIIMOD_NULL,
 556         },
 557         [WIIMOTE_DEV_UNKNOWN] = (const __u8[]){
 558                 WIIMOD_NO_MP,
 559                 WIIMOD_NULL,
 560         },
 561         [WIIMOTE_DEV_GENERIC] = (const __u8[]){
 562                 WIIMOD_KEYS,
 563                 WIIMOD_RUMBLE,
 564                 WIIMOD_BATTERY,
 565                 WIIMOD_LED1,
 566                 WIIMOD_LED2,
 567                 WIIMOD_LED3,
 568                 WIIMOD_LED4,
 569                 WIIMOD_ACCEL,
 570                 WIIMOD_IR,
 571                 WIIMOD_NULL,
 572         },
 573         [WIIMOTE_DEV_GEN10] = (const __u8[]){
 574                 WIIMOD_KEYS,
 575                 WIIMOD_RUMBLE,
 576                 WIIMOD_BATTERY,
 577                 WIIMOD_LED1,
 578                 WIIMOD_LED2,
 579                 WIIMOD_LED3,
 580                 WIIMOD_LED4,
 581                 WIIMOD_ACCEL,
 582                 WIIMOD_IR,
 583                 WIIMOD_NULL,
 584         },
 585         [WIIMOTE_DEV_GEN20] = (const __u8[]){
 586                 WIIMOD_KEYS,
 587                 WIIMOD_RUMBLE,
 588                 WIIMOD_BATTERY,
 589                 WIIMOD_LED1,
 590                 WIIMOD_LED2,
 591                 WIIMOD_LED3,
 592                 WIIMOD_LED4,
 593                 WIIMOD_ACCEL,
 594                 WIIMOD_IR,
 595                 WIIMOD_BUILTIN_MP,
 596                 WIIMOD_NULL,
 597         },
 598         [WIIMOTE_DEV_BALANCE_BOARD] = (const __u8[]) {
 599                 WIIMOD_BATTERY,
 600                 WIIMOD_LED1,
 601                 WIIMOD_NO_MP,
 602                 WIIMOD_NULL,
 603         },
 604 };
 605
 606 static void wiimote_modules_load(struct wiimote_data *wdata,
 607                                  unsigned int devtype)
 608 {
 609         bool need_input = false;
 610         const __u8 *mods, *iter;
 611         const struct wiimod_ops *ops;
 612         int ret;
 613
 614         mods = wiimote_devtype_mods[devtype];
 615
 616         for (iter = mods; *iter != WIIMOD_NULL; ++iter) {
 617                 if (wiimod_table[*iter]->flags & WIIMOD_FLAG_INPUT) {
 618                         need_input = true;
 619                         break;
 620                 }
 621         }
 622
 623         if (need_input) {
 624                 wdata->input = input_allocate_device();
 625                 if (!wdata->input)
 626                         return;
 627
 628                 input_set_drvdata(wdata->input, wdata);
 629                 wdata->input->dev.parent = &wdata->hdev->dev;
 630                 wdata->input->id.bustype = wdata->hdev->bus;
 631                 wdata->input->id.vendor = wdata->hdev->vendor;
 632                 wdata->input->id.product = wdata->hdev->product;
 633                 wdata->input->id.version = wdata->hdev->version;
 634                 wdata->input->name = WIIMOTE_NAME;
 635         }
 636
 637         for (iter = mods; *iter != WIIMOD_NULL; ++iter) {
 638                 ops = wiimod_table[*iter];
 639                 if (!ops->probe)
 640                         continue;
 641
 642                 ret = ops->probe(ops, wdata);
 643                 if (ret)
 644                         goto error;
 645         }
 646
 647         if (wdata->input) {
 648                 ret = input_register_device(wdata->input);
 649                 if (ret)
 650                         goto error;
 651         }
 652
 653         spin_lock_irq(&wdata->state.lock);
 654         wdata->state.devtype = devtype;
 655         spin_unlock_irq(&wdata->state.lock);
 656         return;
 657
 658 error:
 659         for ( ; iter-- != mods; ) {
 660                 ops = wiimod_table[*iter];
 661                 if (ops->remove)
 662                         ops->remove(ops, wdata);
 663         }
 664
 665         if (wdata->input) {
 666                 input_free_device(wdata->input);
 667                 wdata->input = NULL;
 668         }
 669 }
 670
 671 static void wiimote_modules_unload(struct wiimote_data *wdata)
 672 {
 673         const __u8 *mods, *iter;
 674         const struct wiimod_ops *ops;
 675         unsigned long flags;
 676
 677         mods = wiimote_devtype_mods[wdata->state.devtype];
 678
 679         spin_lock_irqsave(&wdata->state.lock, flags);
 680         wdata->state.devtype = WIIMOTE_DEV_UNKNOWN;
 681         spin_unlock_irqrestore(&wdata->state.lock, flags);
 682
 683         /* find end of list */
 684         for (iter = mods; *iter != WIIMOD_NULL; ++iter)
 685                 /* empty */ ;
 686
 687         if (wdata->input) {
 688                 input_get_device(wdata->input);
 689                 input_unregister_device(wdata->input);
 690         }
 691
 692         for ( ; iter-- != mods; ) {
 693                 ops = wiimod_table[*iter];
 694                 if (ops->remove)
 695                         ops->remove(ops, wdata);
 696         }
 697
 698         if (wdata->input) {
 699                 input_put_device(wdata->input);
 700                 wdata->input = NULL;
 701         }
 702 }
 703
 704 /* device extension handling */
 705
 706 static void wiimote_ext_load(struct wiimote_data *wdata, unsigned int ext)
 707 {
 708         unsigned long flags;
 709         const struct wiimod_ops *ops;
 710         int ret;
 711
 712         ops = wiimod_ext_table[ext];
 713
 714         if (ops->probe) {
 715                 ret = ops->probe(ops, wdata);
 716                 if (ret)
 717                         ext = WIIMOTE_EXT_UNKNOWN;
 718         }
 719
 720         spin_lock_irqsave(&wdata->state.lock, flags);
 721         wdata->state.exttype = ext;
 722         spin_unlock_irqrestore(&wdata->state.lock, flags);
 723 }
 724
 725 static void wiimote_ext_unload(struct wiimote_data *wdata)
 726 {
 727         unsigned long flags;
 728         const struct wiimod_ops *ops;
 729
 730         ops = wiimod_ext_table[wdata->state.exttype];
 731
 732         spin_lock_irqsave(&wdata->state.lock, flags);
 733         wdata->state.exttype = WIIMOTE_EXT_UNKNOWN;
 734         wdata->state.flags &= ~WIIPROTO_FLAG_EXT_USED;
 735         spin_unlock_irqrestore(&wdata->state.lock, flags);
 736
 737         if (ops->remove)
 738                 ops->remove(ops, wdata);
 739 }
 740
 741 static void wiimote_mp_load(struct wiimote_data *wdata)
 742 {
 743         unsigned long flags;
 744         const struct wiimod_ops *ops;
 745         int ret;
 746         __u8 mode = 2;
 747
 748         ops = &wiimod_mp;
 749         if (ops->probe) {
 750                 ret = ops->probe(ops, wdata);
 751                 if (ret)
 752                         mode = 1;
 753         }
 754
 755         spin_lock_irqsave(&wdata->state.lock, flags);
 756         wdata->state.mp = mode;
 757         spin_unlock_irqrestore(&wdata->state.lock, flags);
 758 }
 759
 760 static void wiimote_mp_unload(struct wiimote_data *wdata)
 761 {
 762         unsigned long flags;
 763         const struct wiimod_ops *ops;
 764
 765         if (wdata->state.mp < 2)
 766                 return;
 767
 768         ops = &wiimod_mp;
 769
 770         spin_lock_irqsave(&wdata->state.lock, flags);
 771         wdata->state.mp = 0;
 772         wdata->state.flags &= ~WIIPROTO_FLAG_MP_USED;
 773         spin_unlock_irqrestore(&wdata->state.lock, flags);
 774
 775         if (ops->remove)
 776                 ops->remove(ops, wdata);
 777 }
 778
 779 /* device (re-)initialization and detection */
 780
 781 static const char *wiimote_devtype_names[WIIMOTE_DEV_NUM] = {
 782         [WIIMOTE_DEV_PENDING] = "Pending",
 783         [WIIMOTE_DEV_UNKNOWN] = "Unknown",
 784         [WIIMOTE_DEV_GENERIC] = "Generic",
 785         [WIIMOTE_DEV_GEN10] = "Nintendo Wii Remote (Gen 1)",
 786         [WIIMOTE_DEV_GEN20] = "Nintendo Wii Remote Plus (Gen 2)",
 787         [WIIMOTE_DEV_BALANCE_BOARD] = "Nintendo Wii Balance Board",
 788 };
 789
 790 /* Try to guess the device type based on all collected information. We
 791  * first try to detect by static extension types, then VID/PID and the
 792  * device name. If we cannot detect the device, we use
 793  * WIIMOTE_DEV_GENERIC so all modules will get probed on the device. */
 794 static void wiimote_init_set_type(struct wiimote_data *wdata,
 795                                   __u8 exttype)
 796 {
 797         __u8 devtype = WIIMOTE_DEV_GENERIC;
 798         __u16 vendor, product;
 799         const char *name;
 800
 801         vendor = wdata->hdev->vendor;
 802         product = wdata->hdev->product;
 803         name = wdata->hdev->name;
 804
 805         if (exttype == WIIMOTE_EXT_BALANCE_BOARD) {
 806                 devtype = WIIMOTE_DEV_BALANCE_BOARD;
 807                 goto done;
 808         }
 809
 810         if (!strcmp(name, "Nintendo RVL-CNT-01")) {
 811                 devtype = WIIMOTE_DEV_GEN10;
 812                 goto done;
 813         } else if (!strcmp(name, "Nintendo RVL-CNT-01-TR")) {
 814                 devtype = WIIMOTE_DEV_GEN20;
 815                 goto done;
 816         } else if (!strcmp(name, "Nintendo RVL-WBC-01")) {
 817                 devtype = WIIMOTE_DEV_BALANCE_BOARD;
 818                 goto done;
 819         }
 820
 821         if (vendor == USB_VENDOR_ID_NINTENDO) {
 822                 if (product == USB_DEVICE_ID_NINTENDO_WIIMOTE) {
 823                         devtype = WIIMOTE_DEV_GEN10;
 824                         goto done;
 825                 } else if (product == USB_DEVICE_ID_NINTENDO_WIIMOTE2) {
 826                         devtype = WIIMOTE_DEV_GEN20;
 827                         goto done;
 828                 }
 829         }
 830
 831 done:
 832         if (devtype == WIIMOTE_DEV_GENERIC)
 833                 hid_info(wdata->hdev, "cannot detect device; NAME: %s VID: %04x PID: %04x EXT: %04x\n",
 834                         name, vendor, product, exttype);
 835         else
 836                 hid_info(wdata->hdev, "detected device: %s\n",
 837                          wiimote_devtype_names[devtype]);
 838
 839         wiimote_modules_load(wdata, devtype);
 840 }
 841
 842 static void wiimote_init_detect(struct wiimote_data *wdata)
 843 {
 844         __u8 exttype = WIIMOTE_EXT_NONE, extdata[6];
 845         bool ext;
 846         int ret;
 847
 848         wiimote_cmd_acquire_noint(wdata);
 849
 850         spin_lock_irq(&wdata->state.lock);
 851         wdata->state.devtype = WIIMOTE_DEV_UNKNOWN;
 852         wiimote_cmd_set(wdata, WIIPROTO_REQ_SREQ, 0);
 853         wiiproto_req_status(wdata);
 854         spin_unlock_irq(&wdata->state.lock);
 855
 856         ret = wiimote_cmd_wait_noint(wdata);
 857         if (ret)
 858                 goto out_release;
 859
 860         spin_lock_irq(&wdata->state.lock);
 861         ext = wdata->state.flags & WIIPROTO_FLAG_EXT_PLUGGED;
 862         spin_unlock_irq(&wdata->state.lock);
 863
 864         if (!ext)
 865                 goto out_release;
 866
 867         wiimote_cmd_init_ext(wdata);
 868         exttype = wiimote_cmd_read_ext(wdata, extdata);
 869
 870 out_release:
 871         wiimote_cmd_release(wdata);
 872         wiimote_init_set_type(wdata, exttype);
 873
 874         /* schedule MP timer */
 875         spin_lock_irq(&wdata->state.lock);
 876         if (!(wdata->state.flags & WIIPROTO_FLAG_BUILTIN_MP) &&
 877             !(wdata->state.flags & WIIPROTO_FLAG_NO_MP))
 878                 mod_timer(&wdata->timer, jiffies + HZ * 4);
 879         spin_unlock_irq(&wdata->state.lock);
 880 }
 881
 882 /*
 883  * MP hotplug events are not generated by the wiimote. Therefore, we need
 884  * polling to detect it. We use a 4s interval for polling MP registers. This
 885  * seems reasonable considering applications can trigger it manually via
 886  * sysfs requests.
 887  */
 888 static void wiimote_init_poll_mp(struct wiimote_data *wdata)
 889 {
 890         bool mp;
 891         __u8 mpdata[6];
 892
 893         wiimote_cmd_acquire_noint(wdata);
 894         wiimote_cmd_init_mp(wdata);
 895         mp = wiimote_cmd_read_mp(wdata, mpdata);
 896         wiimote_cmd_release(wdata);
 897
 898         /* load/unload MP module if it changed */
 899         if (mp) {
 900                 if (!wdata->state.mp) {
 901                         hid_info(wdata->hdev, "detected extension: Nintendo Wii Motion Plus\n");
 902                         wiimote_mp_load(wdata);
 903                 }
 904         } else if (wdata->state.mp) {
 905                 wiimote_mp_unload(wdata);
 906         }
 907
 908         mod_timer(&wdata->timer, jiffies + HZ * 4);
 909 }
 910
 911 /*
 912  * Check whether the wiimote is in the expected state. The extension registers
 913  * may change during hotplug and initialization so we might get hotplug events
 914  * that we caused by remapping some memory.
 915  * We use some heuristics here to check known states. If the wiimote is in the
 916  * expected state, we can ignore the hotplug event.
 917  *
 918  * Returns "true" if the device is in expected state, "false" if we should
 919  * redo hotplug handling and extension initialization.
 920  */
 921 static bool wiimote_init_check(struct wiimote_data *wdata)
 922 {
 923         __u32 flags;
 924         __u8 type, data[6];
 925         bool ret, poll_mp;
 926
 927         spin_lock_irq(&wdata->state.lock);
 928         flags = wdata->state.flags;
 929         spin_unlock_irq(&wdata->state.lock);
 930
 931         wiimote_cmd_acquire_noint(wdata);
 932
 933         /* If MP is used and active, but the extension is not, we expect:
 934          *   read_mp_mapped() == WIIMOTE_MP_SINGLE
 935          *   state.flags == !EXT_ACTIVE && !MP_PLUGGED && MP_ACTIVE
 936          * We do not check EXT_PLUGGED because it might change during
 937          * initialization of MP without extensions.
 938          *  - If MP is unplugged/replugged, read_mp_mapped() fails
 939          *  - If EXT is plugged, MP_PLUGGED will get set */
 940         if (wdata->state.exttype == WIIMOTE_EXT_NONE &&
 941             wdata->state.mp > 0 && (flags & WIIPROTO_FLAG_MP_USED)) {
 942                 type = wiimote_cmd_read_mp_mapped(wdata);
 943                 ret = type == WIIMOTE_MP_SINGLE;
 944
 945                 spin_lock_irq(&wdata->state.lock);
 946                 ret = ret && !(wdata->state.flags & WIIPROTO_FLAG_EXT_ACTIVE);
 947                 ret = ret && !(wdata->state.flags & WIIPROTO_FLAG_MP_PLUGGED);
 948                 ret = ret && (wdata->state.flags & WIIPROTO_FLAG_MP_ACTIVE);
 949                 spin_unlock_irq(&wdata->state.lock);
 950
 951                 if (!ret)
 952                         hid_dbg(wdata->hdev, "state left: !EXT && MP\n");
 953
 954                 /* while MP is mapped, we get EXT_PLUGGED events */
 955                 poll_mp = false;
 956
 957                 goto out_release;
 958         }
 959
 960         /* If MP is unused, but the extension port is used, we expect:
 961          *   read_ext == state.exttype
 962          *   state.flags == !MP_ACTIVE && EXT_ACTIVE
 963          * - If MP is plugged/unplugged, our timer detects it
 964          * - If EXT is unplugged/replugged, EXT_ACTIVE will become unset */
 965         if (!(flags & WIIPROTO_FLAG_MP_USED) &&
 966             wdata->state.exttype != WIIMOTE_EXT_NONE) {
 967                 type = wiimote_cmd_read_ext(wdata, data);
 968                 ret = type == wdata->state.exttype;
 969
 970                 spin_lock_irq(&wdata->state.lock);
 971                 ret = ret && !(wdata->state.flags & WIIPROTO_FLAG_MP_ACTIVE);
 972                 ret = ret && (wdata->state.flags & WIIPROTO_FLAG_EXT_ACTIVE);
 973                 spin_unlock_irq(&wdata->state.lock);
 974
 975                 if (!ret)
 976                         hid_dbg(wdata->hdev, "state left: EXT && !MP\n");
 977
 978                 /* poll MP for hotplug events */
 979                 poll_mp = true;
 980
 981                 goto out_release;
 982         }
 983
 984         /* If neither MP nor an extension are used, we expect:
 985          *   read_ext() == WIIMOTE_EXT_NONE
 986          *   state.flags == !MP_ACTIVE && !EXT_ACTIVE && !EXT_PLUGGED
 987          * No need to perform any action in this case as everything is
 988          * disabled already.
 989          * - If MP is plugged/unplugged, our timer detects it
 990          * - If EXT is plugged, EXT_PLUGGED will be set */
 991         if (!(flags & WIIPROTO_FLAG_MP_USED) &&
 992             wdata->state.exttype == WIIMOTE_EXT_NONE) {
 993                 type = wiimote_cmd_read_ext(wdata, data);
 994                 ret = type == wdata->state.exttype;
 995
 996                 spin_lock_irq(&wdata->state.lock);
 997                 ret = ret && !(wdata->state.flags & WIIPROTO_FLAG_EXT_ACTIVE);
 998                 ret = ret && !(wdata->state.flags & WIIPROTO_FLAG_MP_ACTIVE);
 999                 ret = ret && !(wdata->state.flags & WIIPROTO_FLAG_EXT_PLUGGED);
1000                 spin_unlock_irq(&wdata->state.lock);
1001
1002                 if (!ret)
1003                         hid_dbg(wdata->hdev, "state left: !EXT && !MP\n");
1004
1005                 /* poll MP for hotplug events */
1006                 poll_mp = true;
1007
1008                 goto out_release;
1009         }
1010
1011         /* The trickiest part is if both EXT and MP are active. We cannot read
1012          * the EXT ID, anymore, because MP is mapped over it. However, we use
1013          * a handy trick here:
1014          *   - EXT_ACTIVE is unset whenever !MP_PLUGGED is sent
1015          * MP_PLUGGED might be re-sent again before we are scheduled, but
1016          * EXT_ACTIVE will stay unset.
1017          * So it is enough to check for mp_mapped() and MP_ACTIVE and
1018          * EXT_ACTIVE. EXT_PLUGGED is a sanity check. */
1019         if (wdata->state.exttype != WIIMOTE_EXT_NONE &&
1020             wdata->state.mp > 0 && (flags & WIIPROTO_FLAG_MP_USED)) {
1021                 type = wiimote_cmd_read_mp_mapped(wdata);
1022                 ret = type != WIIMOTE_MP_NONE;
1023                 ret = ret && type != WIIMOTE_MP_UNKNOWN;
1024                 ret = ret && type != WIIMOTE_MP_SINGLE;
1025
1026                 spin_lock_irq(&wdata->state.lock);
1027                 ret = ret && (wdata->state.flags & WIIPROTO_FLAG_EXT_PLUGGED);
1028                 ret = ret && (wdata->state.flags & WIIPROTO_FLAG_EXT_ACTIVE);
1029                 ret = ret && (wdata->state.flags & WIIPROTO_FLAG_MP_ACTIVE);
1030                 spin_unlock_irq(&wdata->state.lock);
1031
1032                 if (!ret)
1033                         hid_dbg(wdata->hdev, "state left: EXT && MP\n");
1034
1035                 /* while MP is mapped, we get EXT_PLUGGED events */
1036                 poll_mp = false;
1037
1038                 goto out_release;
1039         }
1040
1041         /* unknown state */
1042         ret = false;
1043
1044 out_release:
1045         wiimote_cmd_release(wdata);
1046
1047         /* only poll for MP if requested and if state didn't change */
1048         if (ret && poll_mp && !(flags & WIIPROTO_FLAG_BUILTIN_MP) &&
1049             !(flags & WIIPROTO_FLAG_NO_MP))
1050                 wiimote_init_poll_mp(wdata);
1051
1052         return ret;
1053 }
1054
1055 static const char *wiimote_exttype_names[WIIMOTE_EXT_NUM] = {
1056         [WIIMOTE_EXT_NONE] = "None",
1057         [WIIMOTE_EXT_UNKNOWN] = "Unknown",
1058         [WIIMOTE_EXT_NUNCHUK] = "Nintendo Wii Nunchuk",
1059         [WIIMOTE_EXT_CLASSIC_CONTROLLER] = "Nintendo Wii Classic Controller",
1060         [WIIMOTE_EXT_BALANCE_BOARD] = "Nintendo Wii Balance Board",
1061 };
1062
1063 /*
1064  * Handle hotplug events
1065  * If we receive an hotplug event and the device-check failed, we deinitialize
1066  * the extension ports, re-read all extension IDs and set the device into
1067  * the desired state. This involves mapping MP into the main extension
1068  * registers, setting up extension passthrough modes and initializing the
1069  * requested extensions.
1070  */
1071 static void wiimote_init_hotplug(struct wiimote_data *wdata)
1072 {
1073         __u8 exttype, extdata[6], mpdata[6];
1074         __u32 flags;
1075         bool mp;
1076
1077         hid_dbg(wdata->hdev, "detect extensions..\n");
1078
1079         wiimote_cmd_acquire_noint(wdata);
1080
1081         spin_lock_irq(&wdata->state.lock);
1082
1083         /* get state snapshot that we will then work on */
1084         flags = wdata->state.flags;
1085
1086         /* disable event forwarding temporarily */
1087         wdata->state.flags &= ~WIIPROTO_FLAG_EXT_ACTIVE;
1088         wdata->state.flags &= ~WIIPROTO_FLAG_MP_ACTIVE;
1089
1090         spin_unlock_irq(&wdata->state.lock);
1091
1092         /* init extension and MP (deactivates current extension or MP) */
1093         wiimote_cmd_init_ext(wdata);
1094         if (flags & WIIPROTO_FLAG_NO_MP) {
1095                 mp = false;
1096         } else {
1097                 wiimote_cmd_init_mp(wdata);
1098                 mp = wiimote_cmd_read_mp(wdata, mpdata);
1099         }
1100         exttype = wiimote_cmd_read_ext(wdata, extdata);
1101
1102         wiimote_cmd_release(wdata);
1103
1104         /* load/unload extension module if it changed */
1105         if (exttype != wdata->state.exttype) {
1106                 /* unload previous extension */
1107                 wiimote_ext_unload(wdata);
1108
1109                 if (exttype == WIIMOTE_EXT_UNKNOWN) {
1110                         hid_info(wdata->hdev, "cannot detect extension; %02x:%02x %02x:%02x %02x:%02x\n",
1111                                  extdata[0], extdata[1], extdata[2],
1112                                  extdata[3], extdata[4], extdata[5]);
1113                 } else if (exttype == WIIMOTE_EXT_NONE) {
1114                         spin_lock_irq(&wdata->state.lock);
1115                         wdata->state.exttype = WIIMOTE_EXT_NONE;
1116                         spin_unlock_irq(&wdata->state.lock);
1117                 } else {
1118                         hid_info(wdata->hdev, "detected extension: %s\n",
1119                                  wiimote_exttype_names[exttype]);
1120                         /* try loading new extension */
1121                         wiimote_ext_load(wdata, exttype);
1122                 }
1123         }
1124
1125         /* load/unload MP module if it changed */
1126         if (mp) {
1127                 if (!wdata->state.mp) {
1128                         hid_info(wdata->hdev, "detected extension: Nintendo Wii Motion Plus\n");
1129                         wiimote_mp_load(wdata);
1130                 }
1131         } else if (wdata->state.mp) {
1132                 wiimote_mp_unload(wdata);
1133         }
1134
1135         /* if MP is not used, do not map or activate it */
1136         if (!(flags & WIIPROTO_FLAG_MP_USED))
1137                 mp = false;
1138
1139         /* map MP into main extension registers if used */
1140         if (mp) {
1141                 wiimote_cmd_acquire_noint(wdata);
1142                 wiimote_cmd_map_mp(wdata, exttype);
1143                 wiimote_cmd_release(wdata);
1144
1145                 /* delete MP hotplug timer */
1146                 del_timer_sync(&wdata->timer);
1147         } else {
1148                 /* reschedule MP hotplug timer */
1149                 if (!(flags & WIIPROTO_FLAG_BUILTIN_MP) &&
1150                     !(flags & WIIPROTO_FLAG_NO_MP))
1151                         mod_timer(&wdata->timer, jiffies + HZ * 4);
1152         }
1153
1154         spin_lock_irq(&wdata->state.lock);
1155
1156         /* enable data forwarding again and set expected hotplug state */
1157         if (mp) {
1158                 wdata->state.flags |= WIIPROTO_FLAG_MP_ACTIVE;
1159                 if (wdata->state.exttype == WIIMOTE_EXT_NONE) {
1160                         wdata->state.flags &= ~WIIPROTO_FLAG_EXT_PLUGGED;
1161                         wdata->state.flags &= ~WIIPROTO_FLAG_MP_PLUGGED;
1162                 } else {
1163                         wdata->state.flags &= ~WIIPROTO_FLAG_EXT_PLUGGED;
1164                         wdata->state.flags |= WIIPROTO_FLAG_MP_PLUGGED;
1165                         wdata->state.flags |= WIIPROTO_FLAG_EXT_ACTIVE;
1166                 }
1167         } else if (wdata->state.exttype != WIIMOTE_EXT_NONE) {
1168                 wdata->state.flags |= WIIPROTO_FLAG_EXT_ACTIVE;
1169         }
1170
1171         /* request status report for hotplug state updates */
1172         wiiproto_req_status(wdata);
1173
1174         spin_unlock_irq(&wdata->state.lock);
1175
1176         hid_dbg(wdata->hdev, "detected extensions: MP: %d EXT: %d\n",
1177                 wdata->state.mp, wdata->state.exttype);
1178 }
1179
1180 static void wiimote_init_worker(struct work_struct *work)
1181 {
1182         struct wiimote_data *wdata = container_of(work, struct wiimote_data,
1183                                                   init_worker);
1184         bool changed = false;
1185
1186         if (wdata->state.devtype == WIIMOTE_DEV_PENDING) {
1187                 wiimote_init_detect(wdata);
1188                 changed = true;
1189         }
1190
1191         if (changed || !wiimote_init_check(wdata))
1192                 wiimote_init_hotplug(wdata);
1193
1194         if (changed)
1195                 kobject_uevent(&wdata->hdev->dev.kobj, KOBJ_CHANGE);
1196 }
1197
1198 void __wiimote_schedule(struct wiimote_data *wdata)
1199 {
1200         if (!(wdata->state.flags & WIIPROTO_FLAG_EXITING))
1201                 schedule_work(&wdata->init_worker);
1202 }
1203
1204 static void wiimote_schedule(struct wiimote_data *wdata)
1205 {
1206         unsigned long flags;
1207
1208         spin_lock_irqsave(&wdata->state.lock, flags);
1209         __wiimote_schedule(wdata);
1210         spin_unlock_irqrestore(&wdata->state.lock, flags);
1211 }
1212
1213 static void wiimote_init_timeout(unsigned long arg)
1214 {
1215         struct wiimote_data *wdata = (void*)arg;
1216
1217         wiimote_schedule(wdata);
1218 }
1219
1220 /* protocol handlers */
1221
1222 static void handler_keys(struct wiimote_data *wdata, const __u8 *payload)
1223 {
1224         const __u8 *iter, *mods;
1225         const struct wiimod_ops *ops;
1226
1227         ops = wiimod_ext_table[wdata->state.exttype];
1228         if (ops->in_keys) {
1229                 ops->in_keys(wdata, payload);
1230                 return;
1231         }
1232
1233         mods = wiimote_devtype_mods[wdata->state.devtype];
1234         for (iter = mods; *iter != WIIMOD_NULL; ++iter) {
1235                 ops = wiimod_table[*iter];
1236                 if (ops->in_keys) {
1237                         ops->in_keys(wdata, payload);
1238                         break;
1239                 }
1240         }
1241 }
1242
1243 static void handler_accel(struct wiimote_data *wdata, const __u8 *payload)
1244 {
1245         const __u8 *iter, *mods;
1246         const struct wiimod_ops *ops;
1247
1248         ops = wiimod_ext_table[wdata->state.exttype];
1249         if (ops->in_accel) {
1250                 ops->in_accel(wdata, payload);
1251                 return;
1252         }
1253
1254         mods = wiimote_devtype_mods[wdata->state.devtype];
1255         for (iter = mods; *iter != WIIMOD_NULL; ++iter) {
1256                 ops = wiimod_table[*iter];
1257                 if (ops->in_accel) {
1258                         ops->in_accel(wdata, payload);
1259                         break;
1260                 }
1261         }
1262 }
1263
1264 static bool valid_ext_handler(const struct wiimod_ops *ops, size_t len)
1265 {
1266         if (!ops->in_ext)
1267                 return false;
1268         if ((ops->flags & WIIMOD_FLAG_EXT8) && len < 8)
1269                 return false;
1270         if ((ops->flags & WIIMOD_FLAG_EXT16) && len < 16)
1271                 return false;
1272
1273         return true;
1274 }
1275
1276 static void handler_ext(struct wiimote_data *wdata, const __u8 *payload,
1277                         size_t len)
1278 {
1279         const __u8 *iter, *mods;
1280         const struct wiimod_ops *ops;
1281         bool is_mp;
1282
1283         if (len < 6)
1284                 return;
1285
1286         /* if MP is active, track MP slot hotplugging */
1287         if (wdata->state.flags & WIIPROTO_FLAG_MP_ACTIVE) {
1288                 /* this bit is set for invalid events (eg. during hotplug) */
1289                 if (payload[5] & 0x01)
1290                         return;
1291
1292                 if (payload[4] & 0x01) {
1293                         if (!(wdata->state.flags & WIIPROTO_FLAG_MP_PLUGGED)) {
1294                                 hid_dbg(wdata->hdev, "MP hotplug: 1\n");
1295                                 wdata->state.flags |= WIIPROTO_FLAG_MP_PLUGGED;
1296                                 __wiimote_schedule(wdata);
1297                         }
1298                 } else {
1299                         if (wdata->state.flags & WIIPROTO_FLAG_MP_PLUGGED) {
1300                                 hid_dbg(wdata->hdev, "MP hotplug: 0\n");
1301                                 wdata->state.flags &= ~WIIPROTO_FLAG_MP_PLUGGED;
1302                                 wdata->state.flags &= ~WIIPROTO_FLAG_EXT_ACTIVE;
1303                                 __wiimote_schedule(wdata);
1304                         }
1305                 }
1306
1307                 /* detect MP data that is sent interleaved with EXT data */
1308                 is_mp = payload[5] & 0x02;
1309         } else {
1310                 is_mp = false;
1311         }
1312
1313         /* ignore EXT events if no extension is active */
1314         if (!(wdata->state.flags & WIIPROTO_FLAG_EXT_ACTIVE) && !is_mp)
1315                 return;
1316
1317         /* try forwarding to extension handler, first */
1318         ops = wiimod_ext_table[wdata->state.exttype];
1319         if (is_mp && ops->in_mp) {
1320                 ops->in_mp(wdata, payload);
1321                 return;
1322         } else if (!is_mp && valid_ext_handler(ops, len)) {
1323                 ops->in_ext(wdata, payload);
1324                 return;
1325         }
1326
1327         /* try forwarding to MP handler */
1328         ops = &wiimod_mp;
1329         if (is_mp && ops->in_mp) {
1330                 ops->in_mp(wdata, payload);
1331                 return;
1332         } else if (!is_mp && valid_ext_handler(ops, len)) {
1333                 ops->in_ext(wdata, payload);
1334                 return;
1335         }
1336
1337         /* try forwarding to loaded modules */
1338         mods = wiimote_devtype_mods[wdata->state.devtype];
1339         for (iter = mods; *iter != WIIMOD_NULL; ++iter) {
1340                 ops = wiimod_table[*iter];
1341                 if (is_mp && ops->in_mp) {
1342                         ops->in_mp(wdata, payload);
1343                         return;
1344                 } else if (!is_mp && valid_ext_handler(ops, len)) {
1345                         ops->in_ext(wdata, payload);
1346                         return;
1347                 }
1348         }
1349 }
1350
1351 #define ir_to_input0(wdata, ir, packed) handler_ir((wdata), (ir), (packed), 0)
1352 #define ir_to_input1(wdata, ir, packed) handler_ir((wdata), (ir), (packed), 1)
1353 #define ir_to_input2(wdata, ir, packed) handler_ir((wdata), (ir), (packed), 2)
1354 #define ir_to_input3(wdata, ir, packed) handler_ir((wdata), (ir), (packed), 3)
1355
1356 static void handler_ir(struct wiimote_data *wdata, const __u8 *payload,
1357                        bool packed, unsigned int id)
1358 {
1359         const __u8 *iter, *mods;
1360         const struct wiimod_ops *ops;
1361
1362         ops = wiimod_ext_table[wdata->state.exttype];
1363         if (ops->in_ir) {
1364                 ops->in_ir(wdata, payload, packed, id);
1365                 return;
1366         }
1367
1368         mods = wiimote_devtype_mods[wdata->state.devtype];
1369         for (iter = mods; *iter != WIIMOD_NULL; ++iter) {
1370                 ops = wiimod_table[*iter];
1371                 if (ops->in_ir) {
1372                         ops->in_ir(wdata, payload, packed, id);
1373                         break;
1374                 }
1375         }
1376 }
1377
1378 /* reduced status report with "BB BB" key data only */
1379 static void handler_status_K(struct wiimote_data *wdata,
1380                              const __u8 *payload)
1381 {
1382         handler_keys(wdata, payload);
1383
1384         /* on status reports the drm is reset so we need to resend the drm */
1385         wiiproto_req_drm(wdata, WIIPROTO_REQ_NULL);
1386 }
1387
1388 /* extended status report with "BB BB LF 00 00 VV" data */
1389 static void handler_status(struct wiimote_data *wdata, const __u8 *payload)
1390 {
1391         handler_status_K(wdata, payload);
1392
1393         /* update extension status */
1394         if (payload[2] & 0x02) {
1395                 if (!(wdata->state.flags & WIIPROTO_FLAG_EXT_PLUGGED)) {
1396                         hid_dbg(wdata->hdev, "EXT hotplug: 1\n");
1397                         wdata->state.flags |= WIIPROTO_FLAG_EXT_PLUGGED;
1398                         __wiimote_schedule(wdata);
1399                 }
1400         } else {
1401                 if (wdata->state.flags & WIIPROTO_FLAG_EXT_PLUGGED) {
1402                         hid_dbg(wdata->hdev, "EXT hotplug: 0\n");
1403                         wdata->state.flags &= ~WIIPROTO_FLAG_EXT_PLUGGED;
1404                         wdata->state.flags &= ~WIIPROTO_FLAG_MP_PLUGGED;
1405                         wdata->state.flags &= ~WIIPROTO_FLAG_EXT_ACTIVE;
1406                         wdata->state.flags &= ~WIIPROTO_FLAG_MP_ACTIVE;
1407                         __wiimote_schedule(wdata);
1408                 }
1409         }
1410
1411         wdata->state.cmd_battery = payload[5];
1412         if (wiimote_cmd_pending(wdata, WIIPROTO_REQ_SREQ, 0))
1413                 wiimote_cmd_complete(wdata);
1414 }
1415
1416 /* reduced generic report with "BB BB" key data only */
1417 static void handler_generic_K(struct wiimote_data *wdata, const __u8 *payload)
1418 {
1419         handler_keys(wdata, payload);
1420 }
1421
1422 static void handler_data(struct wiimote_data *wdata, const __u8 *payload)
1423 {
1424         __u16 offset = payload[3] << 8 | payload[4];
1425         __u8 size = (payload[2] >> 4) + 1;
1426         __u8 err = payload[2] & 0x0f;
1427
1428         handler_keys(wdata, payload);
1429
1430         if (wiimote_cmd_pending(wdata, WIIPROTO_REQ_RMEM, offset)) {
1431                 if (err)
1432                         size = 0;
1433                 else if (size > wdata->state.cmd_read_size)
1434                         size = wdata->state.cmd_read_size;
1435
1436                 wdata->state.cmd_read_size = size;
1437                 if (wdata->state.cmd_read_buf)
1438                         memcpy(wdata->state.cmd_read_buf, &payload[5], size);
1439                 wiimote_cmd_complete(wdata);
1440         }
1441 }
1442
1443 static void handler_return(struct wiimote_data *wdata, const __u8 *payload)
1444 {
1445         __u8 err = payload[3];
1446         __u8 cmd = payload[2];
1447
1448         handler_keys(wdata, payload);
1449
1450         if (wiimote_cmd_pending(wdata, cmd, 0)) {
1451                 wdata->state.cmd_err = err;
1452                 wiimote_cmd_complete(wdata);
1453         } else if (err) {
1454                 hid_warn(wdata->hdev, "Remote error %hhu on req %hhu\n", err,
1455                                                                         cmd);
1456         }
1457 }
1458
1459 static void handler_drm_KA(struct wiimote_data *wdata, const __u8 *payload)
1460 {
1461         handler_keys(wdata, payload);
1462         handler_accel(wdata, payload);
1463 }
1464
1465 static void handler_drm_KE(struct wiimote_data *wdata, const __u8 *payload)
1466 {
1467         handler_keys(wdata, payload);
1468         handler_ext(wdata, &payload[2], 8);
1469 }
1470
1471 static void handler_drm_KAI(struct wiimote_data *wdata, const __u8 *payload)
1472 {
1473         handler_keys(wdata, payload);
1474         handler_accel(wdata, payload);
1475         ir_to_input0(wdata, &payload[5], false);
1476         ir_to_input1(wdata, &payload[8], false);
1477         ir_to_input2(wdata, &payload[11], false);
1478         ir_to_input3(wdata, &payload[14], false);
1479 }
1480
1481 static void handler_drm_KEE(struct wiimote_data *wdata, const __u8 *payload)
1482 {
1483         handler_keys(wdata, payload);
1484         handler_ext(wdata, &payload[2], 19);
1485 }
1486
1487 static void handler_drm_KIE(struct wiimote_data *wdata, const __u8 *payload)
1488 {
1489         handler_keys(wdata, payload);
1490         ir_to_input0(wdata, &payload[2], false);
1491         ir_to_input1(wdata, &payload[4], true);
1492         ir_to_input2(wdata, &payload[7], false);
1493         ir_to_input3(wdata, &payload[9], true);
1494         handler_ext(wdata, &payload[12], 9);
1495 }
1496
1497 static void handler_drm_KAE(struct wiimote_data *wdata, const __u8 *payload)
1498 {
1499         handler_keys(wdata, payload);
1500         handler_accel(wdata, payload);
1501         handler_ext(wdata, &payload[5], 16);
1502 }
1503
1504 static void handler_drm_KAIE(struct wiimote_data *wdata, const __u8 *payload)
1505 {
1506         handler_keys(wdata, payload);
1507         handler_accel(wdata, payload);
1508         ir_to_input0(wdata, &payload[5], false);
1509         ir_to_input1(wdata, &payload[7], true);
1510         ir_to_input2(wdata, &payload[10], false);
1511         ir_to_input3(wdata, &payload[12], true);
1512         handler_ext(wdata, &payload[15], 6);
1513 }
1514
1515 static void handler_drm_E(struct wiimote_data *wdata, const __u8 *payload)
1516 {
1517         handler_ext(wdata, payload, 21);
1518 }
1519
1520 static void handler_drm_SKAI1(struct wiimote_data *wdata, const __u8 *payload)
1521 {
1522         handler_keys(wdata, payload);
1523
1524         wdata->state.accel_split[0] = payload[2];
1525         wdata->state.accel_split[1] = (payload[0] >> 1) & (0x10 | 0x20);
1526         wdata->state.accel_split[1] |= (payload[1] << 1) & (0x40 | 0x80);
1527
1528         ir_to_input0(wdata, &payload[3], false);
1529         ir_to_input1(wdata, &payload[12], false);
1530 }
1531
1532 static void handler_drm_SKAI2(struct wiimote_data *wdata, const __u8 *payload)
1533 {
1534         __u8 buf[5];
1535
1536         handler_keys(wdata, payload);
1537
1538         wdata->state.accel_split[1] |= (payload[0] >> 5) & (0x01 | 0x02);
1539         wdata->state.accel_split[1] |= (payload[1] >> 3) & (0x04 | 0x08);
1540
1541         buf[0] = 0;
1542         buf[1] = 0;
1543         buf[2] = wdata->state.accel_split[0];
1544         buf[3] = payload[2];
1545         buf[4] = wdata->state.accel_split[1];
1546         handler_accel(wdata, buf);
1547
1548         ir_to_input2(wdata, &payload[3], false);
1549         ir_to_input3(wdata, &payload[12], false);
1550 }
1551
1552 struct wiiproto_handler {
1553         __u8 id;
1554         size_t size;
1555         void (*func)(struct wiimote_data *wdata, const __u8 *payload);
1556 };
1557
1558 static struct wiiproto_handler handlers[] = {
1559         { .id = WIIPROTO_REQ_STATUS, .size = 6, .func = handler_status },
1560         { .id = WIIPROTO_REQ_STATUS, .size = 2, .func = handler_status_K },
1561         { .id = WIIPROTO_REQ_DATA, .size = 21, .func = handler_data },
1562         { .id = WIIPROTO_REQ_DATA, .size = 2, .func = handler_generic_K },
1563         { .id = WIIPROTO_REQ_RETURN, .size = 4, .func = handler_return },
1564         { .id = WIIPROTO_REQ_RETURN, .size = 2, .func = handler_generic_K },
1565         { .id = WIIPROTO_REQ_DRM_K, .size = 2, .func = handler_keys },
1566         { .id = WIIPROTO_REQ_DRM_KA, .size = 5, .func = handler_drm_KA },
1567         { .id = WIIPROTO_REQ_DRM_KA, .size = 2, .func = handler_generic_K },
1568         { .id = WIIPROTO_REQ_DRM_KE, .size = 10, .func = handler_drm_KE },
1569         { .id = WIIPROTO_REQ_DRM_KE, .size = 2, .func = handler_generic_K },
1570         { .id = WIIPROTO_REQ_DRM_KAI, .size = 17, .func = handler_drm_KAI },
1571         { .id = WIIPROTO_REQ_DRM_KAI, .size = 2, .func = handler_generic_K },
1572         { .id = WIIPROTO_REQ_DRM_KEE, .size = 21, .func = handler_drm_KEE },
1573         { .id = WIIPROTO_REQ_DRM_KEE, .size = 2, .func = handler_generic_K },
1574         { .id = WIIPROTO_REQ_DRM_KAE, .size = 21, .func = handler_drm_KAE },
1575         { .id = WIIPROTO_REQ_DRM_KAE, .size = 2, .func = handler_generic_K },
1576         { .id = WIIPROTO_REQ_DRM_KIE, .size = 21, .func = handler_drm_KIE },
1577         { .id = WIIPROTO_REQ_DRM_KIE, .size = 2, .func = handler_generic_K },
1578         { .id = WIIPROTO_REQ_DRM_KAIE, .size = 21, .func = handler_drm_KAIE },
1579         { .id = WIIPROTO_REQ_DRM_KAIE, .size = 2, .func = handler_generic_K },
1580         { .id = WIIPROTO_REQ_DRM_E, .size = 21, .func = handler_drm_E },
1581         { .id = WIIPROTO_REQ_DRM_SKAI1, .size = 21, .func = handler_drm_SKAI1 },
1582         { .id = WIIPROTO_REQ_DRM_SKAI2, .size = 21, .func = handler_drm_SKAI2 },
1583         { .id = 0 }
1584 };
1585
1586 static int wiimote_hid_event(struct hid_device *hdev, struct hid_report *report,
1587                                                         u8 *raw_data, int size)
1588 {
1589         struct wiimote_data *wdata = hid_get_drvdata(hdev);
1590         struct wiiproto_handler *h;
1591         int i;
1592         unsigned long flags;
1593
1594         if (size < 1)
1595                 return -EINVAL;
1596
1597         spin_lock_irqsave(&wdata->state.lock, flags);
1598
1599         for (i = 0; handlers[i].id; ++i) {
1600                 h = &handlers[i];
1601                 if (h->id == raw_data[0] && h->size < size) {
1602                         h->func(wdata, &raw_data[1]);
1603                         break;
1604                 }
1605         }
1606
1607         if (!handlers[i].id)
1608                 hid_warn(hdev, "Unhandled report %hhu size %d\n", raw_data[0],
1609                                                                         size);
1610
1611         spin_unlock_irqrestore(&wdata->state.lock, flags);
1612
1613         return 0;
1614 }
1615
1616 static ssize_t wiimote_ext_show(struct device *dev,
1617                                 struct device_attribute *attr,
1618                                 char *buf)
1619 {
1620         struct wiimote_data *wdata = dev_to_wii(dev);
1621         __u8 type;
1622         unsigned long flags;
1623
1624         spin_lock_irqsave(&wdata->state.lock, flags);
1625         type = wdata->state.exttype;
1626         spin_unlock_irqrestore(&wdata->state.lock, flags);
1627
1628         switch (type) {
1629         case WIIMOTE_EXT_NONE:
1630                 return sprintf(buf, "none\n");
1631         case WIIMOTE_EXT_NUNCHUK:
1632                 return sprintf(buf, "nunchuk\n");
1633         case WIIMOTE_EXT_CLASSIC_CONTROLLER:
1634                 return sprintf(buf, "classic\n");
1635         case WIIMOTE_EXT_BALANCE_BOARD:
1636                 return sprintf(buf, "balanceboard\n");
1637         case WIIMOTE_EXT_UNKNOWN:
1638                 /* fallthrough */
1639         default:
1640                 return sprintf(buf, "unknown\n");
1641         }
1642 }
1643
1644 static ssize_t wiimote_ext_store(struct device *dev,
1645                                  struct device_attribute *attr,
1646                                  const char *buf, size_t count)
1647 {
1648         struct wiimote_data *wdata = dev_to_wii(dev);
1649
1650         if (!strcmp(buf, "scan")) {
1651                 wiimote_schedule(wdata);
1652         } else {
1653                 return -EINVAL;
1654         }
1655
1656         return strnlen(buf, PAGE_SIZE);
1657 }
1658
1659 static DEVICE_ATTR(extension, S_IRUGO | S_IWUSR | S_IWGRP, wiimote_ext_show,
1660                    wiimote_ext_store);
1661
1662 static ssize_t wiimote_dev_show(struct device *dev,
1663                                 struct device_attribute *attr,
1664                                 char *buf)
1665 {
1666         struct wiimote_data *wdata = dev_to_wii(dev);
1667         __u8 type;
1668         unsigned long flags;
1669
1670         spin_lock_irqsave(&wdata->state.lock, flags);
1671         type = wdata->state.devtype;
1672         spin_unlock_irqrestore(&wdata->state.lock, flags);
1673
1674         switch (type) {
1675         case WIIMOTE_DEV_GENERIC:
1676                 return sprintf(buf, "generic\n");
1677         case WIIMOTE_DEV_GEN10:
1678                 return sprintf(buf, "gen10\n");
1679         case WIIMOTE_DEV_GEN20:
1680                 return sprintf(buf, "gen20\n");
1681         case WIIMOTE_DEV_BALANCE_BOARD:
1682                 return sprintf(buf, "balanceboard\n");
1683         case WIIMOTE_DEV_PENDING:
1684                 return sprintf(buf, "pending\n");
1685         case WIIMOTE_DEV_UNKNOWN:
1686                 /* fallthrough */
1687         default:
1688                 return sprintf(buf, "unknown\n");
1689         }
1690 }
1691
1692 static DEVICE_ATTR(devtype, S_IRUGO, wiimote_dev_show, NULL);
1693
1694 static struct wiimote_data *wiimote_create(struct hid_device *hdev)
1695 {
1696         struct wiimote_data *wdata;
1697
1698         wdata = kzalloc(sizeof(*wdata), GFP_KERNEL);
1699         if (!wdata)
1700                 return NULL;
1701
1702         wdata->hdev = hdev;
1703         hid_set_drvdata(hdev, wdata);
1704
1705         spin_lock_init(&wdata->queue.lock);
1706         INIT_WORK(&wdata->queue.worker, wiimote_queue_worker);
1707
1708         spin_lock_init(&wdata->state.lock);
1709         init_completion(&wdata->state.ready);
1710         mutex_init(&wdata->state.sync);
1711         wdata->state.drm = WIIPROTO_REQ_DRM_K;
1712         wdata->state.cmd_battery = 0xff;
1713
1714         INIT_WORK(&wdata->init_worker, wiimote_init_worker);
1715         setup_timer(&wdata->timer, wiimote_init_timeout, (long)wdata);
1716
1717         return wdata;
1718 }
1719
1720 static void wiimote_destroy(struct wiimote_data *wdata)
1721 {
1722         unsigned long flags;
1723
1724         wiidebug_deinit(wdata);
1725
1726         /* prevent init_worker from being scheduled again */
1727         spin_lock_irqsave(&wdata->state.lock, flags);
1728         wdata->state.flags |= WIIPROTO_FLAG_EXITING;
1729         spin_unlock_irqrestore(&wdata->state.lock, flags);
1730
1731         cancel_work_sync(&wdata->init_worker);
1732         del_timer_sync(&wdata->timer);
1733
1734         device_remove_file(&wdata->hdev->dev, &dev_attr_devtype);
1735         device_remove_file(&wdata->hdev->dev, &dev_attr_extension);
1736
1737         wiimote_mp_unload(wdata);
1738         wiimote_ext_unload(wdata);
1739         wiimote_modules_unload(wdata);
1740         cancel_work_sync(&wdata->queue.worker);
1741         hid_hw_close(wdata->hdev);
1742         hid_hw_stop(wdata->hdev);
1743
1744         kfree(wdata);
1745 }
1746
1747 static int wiimote_hid_probe(struct hid_device *hdev,
1748                                 const struct hid_device_id *id)
1749 {
1750         struct wiimote_data *wdata;
1751         int ret;
1752
1753         hdev->quirks |= HID_QUIRK_NO_INIT_REPORTS;
1754
1755         wdata = wiimote_create(hdev);
1756         if (!wdata) {
1757                 hid_err(hdev, "Can't alloc device\n");
1758                 return -ENOMEM;
1759         }
1760
1761         ret = hid_parse(hdev);
1762         if (ret) {
1763                 hid_err(hdev, "HID parse failed\n");
1764                 goto err;
1765         }
1766
1767         ret = hid_hw_start(hdev, HID_CONNECT_HIDRAW);
1768         if (ret) {
1769                 hid_err(hdev, "HW start failed\n");
1770                 goto err;
1771         }
1772
1773         ret = hid_hw_open(hdev);
1774         if (ret) {
1775                 hid_err(hdev, "cannot start hardware I/O\n");
1776                 goto err_stop;
1777         }
1778
1779         ret = device_create_file(&hdev->dev, &dev_attr_extension);
1780         if (ret) {
1781                 hid_err(hdev, "cannot create sysfs attribute\n");
1782                 goto err_close;
1783         }
1784
1785         ret = device_create_file(&hdev->dev, &dev_attr_devtype);
1786         if (ret) {
1787                 hid_err(hdev, "cannot create sysfs attribute\n");
1788                 goto err_ext;
1789         }
1790
1791         ret = wiidebug_init(wdata);
1792         if (ret)
1793                 goto err_free;
1794
1795         hid_info(hdev, "New device registered\n");
1796
1797         /* schedule device detection */
1798         wiimote_schedule(wdata);
1799
1800         return 0;
1801
1802 err_free:
1803         wiimote_destroy(wdata);
1804         return ret;
1805
1806 err_ext:
1807         device_remove_file(&wdata->hdev->dev, &dev_attr_extension);
1808 err_close:
1809         hid_hw_close(hdev);
1810 err_stop:
1811         hid_hw_stop(hdev);
1812 err:
1813         input_free_device(wdata->ir);
1814         input_free_device(wdata->accel);
1815         kfree(wdata);
1816         return ret;
1817 }
1818
1819 static void wiimote_hid_remove(struct hid_device *hdev)
1820 {
1821         struct wiimote_data *wdata = hid_get_drvdata(hdev);
1822
1823         hid_info(hdev, "Device removed\n");
1824         wiimote_destroy(wdata);
1825 }
1826
1827 static const struct hid_device_id wiimote_hid_devices[] = {
1828         { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_NINTENDO,
1829                                 USB_DEVICE_ID_NINTENDO_WIIMOTE) },
1830         { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_NINTENDO,
1831                                 USB_DEVICE_ID_NINTENDO_WIIMOTE2) },
1832         { }
1833 };
1834 MODULE_DEVICE_TABLE(hid, wiimote_hid_devices);
1835
1836 static struct hid_driver wiimote_hid_driver = {
1837         .name = "wiimote",
1838         .id_table = wiimote_hid_devices,
1839         .probe = wiimote_hid_probe,
1840         .remove = wiimote_hid_remove,
1841         .raw_event = wiimote_hid_event,
1842 };
1843 module_hid_driver(wiimote_hid_driver);
1844
1845 MODULE_LICENSE("GPL");
1846 MODULE_AUTHOR("David Herrmann <dh.herrmann@gmail.com>");
1847 MODULE_DESCRIPTION("Driver for Nintendo Wii / Wii U peripherals");