drivers/hid/hid-wiimote-core.c

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This source file includes following definitions.
wiimote_hid_send
wiimote_queue_worker
wiimote_queue
wiiproto_keep_rumble
wiiproto_req_rumble
wiiproto_req_leds
select_drm
wiiproto_req_drm
wiiproto_req_status
wiiproto_req_accel
wiiproto_req_ir1
wiiproto_req_ir2
wiiproto_req_wmem
wiiproto_req_rmem
wiimote_cmd_write
wiimote_cmd_read
wiimote_cmd_init_ext
wiimote_cmd_read_ext
wiimote_cmd_init_mp
wiimote_cmd_map_mp
wiimote_cmd_read_mp
wiimote_cmd_read_mp_mapped
wiimote_modules_load
wiimote_modules_unload
wiimote_ext_load
wiimote_ext_unload
wiimote_mp_load
wiimote_mp_unload
wiimote_init_set_type
wiimote_init_detect
wiimote_init_poll_mp
wiimote_init_check
wiimote_init_hotplug
wiimote_init_worker
__wiimote_schedule
wiimote_schedule
wiimote_init_timeout
handler_keys
handler_accel
valid_ext_handler
handler_ext
handler_ir
handler_status_K
handler_status
handler_generic_K
handler_data
handler_return
handler_drm_KA
handler_drm_KE
handler_drm_KAI
handler_drm_KEE
handler_drm_KIE
handler_drm_KAE
handler_drm_KAIE
handler_drm_E
handler_drm_SKAI1
handler_drm_SKAI2
wiimote_hid_event
wiimote_ext_show
wiimote_ext_store
wiimote_dev_show
wiimote_create
wiimote_destroy
wiimote_hid_probe
wiimote_hid_remove
   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 
  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 
  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 
  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  */
 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 
 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 
 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  */
 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 
 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 
 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 
 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 
 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 
 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 
 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 
 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 */
 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 */
 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 */
 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 */
 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 */
 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 */
 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 */
 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 */
 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 
 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 
 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 
 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 
 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 
 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 
 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. */
 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 
 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  */
 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  */
 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  */
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 
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 
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 
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 
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 
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 
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 
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 
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 
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 */
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 */
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 */
1448 static void handler_generic_K(struct wiimote_data *wdata, const __u8 *payload)
1449 {
1450         handler_keys(wdata, payload);
1451 }
1452 
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 
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 
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 
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 
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 
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 
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 
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 
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 
1546 static void handler_drm_E(struct wiimote_data *wdata, const __u8 *payload)
1547 {
1548         handler_ext(wdata, payload, 21);
1549 }
1550 
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 
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 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 
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         struct wiiproto_handler *h;
1622         int i;
1623         unsigned long flags;
1624 
1625         if (size < 1)
1626                 return -EINVAL;
1627 
1628         spin_lock_irqsave(&wdata->state.lock, flags);
1629 
1630         for (i = 0; handlers[i].id; ++i) {
1631                 h = &handlers[i];
1632                 if (h->id == raw_data[0] && h->size < size) {
1633                         h->func(wdata, &raw_data[1]);
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         spin_unlock_irqrestore(&wdata->state.lock, flags);
1643 
1644         return 0;
1645 }
1646 
1647 static ssize_t wiimote_ext_show(struct device *dev,
1648                                 struct device_attribute *attr,
1649                                 char *buf)
1650 {
1651         struct wiimote_data *wdata = dev_to_wii(dev);
1652         __u8 type;
1653         unsigned long flags;
1654 
1655         spin_lock_irqsave(&wdata->state.lock, flags);
1656         type = wdata->state.exttype;
1657         spin_unlock_irqrestore(&wdata->state.lock, flags);
1658 
1659         switch (type) {
1660         case WIIMOTE_EXT_NONE:
1661                 return sprintf(buf, "none\n");
1662         case WIIMOTE_EXT_NUNCHUK:
1663                 return sprintf(buf, "nunchuk\n");
1664         case WIIMOTE_EXT_CLASSIC_CONTROLLER:
1665                 return sprintf(buf, "classic\n");
1666         case WIIMOTE_EXT_BALANCE_BOARD:
1667                 return sprintf(buf, "balanceboard\n");
1668         case WIIMOTE_EXT_PRO_CONTROLLER:
1669                 return sprintf(buf, "procontroller\n");
1670         case WIIMOTE_EXT_DRUMS:
1671                 return sprintf(buf, "drums\n");
1672         case WIIMOTE_EXT_GUITAR:
1673                 return sprintf(buf, "guitar\n");
1674         case WIIMOTE_EXT_UNKNOWN:
1675                 /* fallthrough */
1676         default:
1677                 return sprintf(buf, "unknown\n");
1678         }
1679 }
1680 
1681 static ssize_t wiimote_ext_store(struct device *dev,
1682                                  struct device_attribute *attr,
1683                                  const char *buf, size_t count)
1684 {
1685         struct wiimote_data *wdata = dev_to_wii(dev);
1686 
1687         if (!strcmp(buf, "scan")) {
1688                 wiimote_schedule(wdata);
1689         } else {
1690                 return -EINVAL;
1691         }
1692 
1693         return strnlen(buf, PAGE_SIZE);
1694 }
1695 
1696 static DEVICE_ATTR(extension, S_IRUGO | S_IWUSR | S_IWGRP, wiimote_ext_show,
1697                    wiimote_ext_store);
1698 
1699 static ssize_t wiimote_dev_show(struct device *dev,
1700                                 struct device_attribute *attr,
1701                                 char *buf)
1702 {
1703         struct wiimote_data *wdata = dev_to_wii(dev);
1704         __u8 type;
1705         unsigned long flags;
1706 
1707         spin_lock_irqsave(&wdata->state.lock, flags);
1708         type = wdata->state.devtype;
1709         spin_unlock_irqrestore(&wdata->state.lock, flags);
1710 
1711         switch (type) {
1712         case WIIMOTE_DEV_GENERIC:
1713                 return sprintf(buf, "generic\n");
1714         case WIIMOTE_DEV_GEN10:
1715                 return sprintf(buf, "gen10\n");
1716         case WIIMOTE_DEV_GEN20:
1717                 return sprintf(buf, "gen20\n");
1718         case WIIMOTE_DEV_BALANCE_BOARD:
1719                 return sprintf(buf, "balanceboard\n");
1720         case WIIMOTE_DEV_PRO_CONTROLLER:
1721                 return sprintf(buf, "procontroller\n");
1722         case WIIMOTE_DEV_PENDING:
1723                 return sprintf(buf, "pending\n");
1724         case WIIMOTE_DEV_UNKNOWN:
1725                 /* fallthrough */
1726         default:
1727                 return sprintf(buf, "unknown\n");
1728         }
1729 }
1730 
1731 static DEVICE_ATTR(devtype, S_IRUGO, wiimote_dev_show, NULL);
1732 
1733 static struct wiimote_data *wiimote_create(struct hid_device *hdev)
1734 {
1735         struct wiimote_data *wdata;
1736 
1737         wdata = kzalloc(sizeof(*wdata), GFP_KERNEL);
1738         if (!wdata)
1739                 return NULL;
1740 
1741         wdata->hdev = hdev;
1742         hid_set_drvdata(hdev, wdata);
1743 
1744         spin_lock_init(&wdata->queue.lock);
1745         INIT_WORK(&wdata->queue.worker, wiimote_queue_worker);
1746 
1747         spin_lock_init(&wdata->state.lock);
1748         init_completion(&wdata->state.ready);
1749         mutex_init(&wdata->state.sync);
1750         wdata->state.drm = WIIPROTO_REQ_DRM_K;
1751         wdata->state.cmd_battery = 0xff;
1752 
1753         INIT_WORK(&wdata->init_worker, wiimote_init_worker);
1754         timer_setup(&wdata->timer, wiimote_init_timeout, 0);
1755 
1756         return wdata;
1757 }
1758 
1759 static void wiimote_destroy(struct wiimote_data *wdata)
1760 {
1761         unsigned long flags;
1762 
1763         wiidebug_deinit(wdata);
1764 
1765         /* prevent init_worker from being scheduled again */
1766         spin_lock_irqsave(&wdata->state.lock, flags);
1767         wdata->state.flags |= WIIPROTO_FLAG_EXITING;
1768         spin_unlock_irqrestore(&wdata->state.lock, flags);
1769 
1770         cancel_work_sync(&wdata->init_worker);
1771         del_timer_sync(&wdata->timer);
1772 
1773         device_remove_file(&wdata->hdev->dev, &dev_attr_devtype);
1774         device_remove_file(&wdata->hdev->dev, &dev_attr_extension);
1775 
1776         wiimote_mp_unload(wdata);
1777         wiimote_ext_unload(wdata);
1778         wiimote_modules_unload(wdata);
1779         cancel_work_sync(&wdata->queue.worker);
1780         hid_hw_close(wdata->hdev);
1781         hid_hw_stop(wdata->hdev);
1782 
1783         kfree(wdata);
1784 }
1785 
1786 static int wiimote_hid_probe(struct hid_device *hdev,
1787                                 const struct hid_device_id *id)
1788 {
1789         struct wiimote_data *wdata;
1790         int ret;
1791 
1792         hdev->quirks |= HID_QUIRK_NO_INIT_REPORTS;
1793 
1794         wdata = wiimote_create(hdev);
1795         if (!wdata) {
1796                 hid_err(hdev, "Can't alloc device\n");
1797                 return -ENOMEM;
1798         }
1799 
1800         ret = hid_parse(hdev);
1801         if (ret) {
1802                 hid_err(hdev, "HID parse failed\n");
1803                 goto err;
1804         }
1805 
1806         ret = hid_hw_start(hdev, HID_CONNECT_HIDRAW);
1807         if (ret) {
1808                 hid_err(hdev, "HW start failed\n");
1809                 goto err;
1810         }
1811 
1812         ret = hid_hw_open(hdev);
1813         if (ret) {
1814                 hid_err(hdev, "cannot start hardware I/O\n");
1815                 goto err_stop;
1816         }
1817 
1818         ret = device_create_file(&hdev->dev, &dev_attr_extension);
1819         if (ret) {
1820                 hid_err(hdev, "cannot create sysfs attribute\n");
1821                 goto err_close;
1822         }
1823 
1824         ret = device_create_file(&hdev->dev, &dev_attr_devtype);
1825         if (ret) {
1826                 hid_err(hdev, "cannot create sysfs attribute\n");
1827                 goto err_ext;
1828         }
1829 
1830         ret = wiidebug_init(wdata);
1831         if (ret)
1832                 goto err_free;
1833 
1834         hid_info(hdev, "New device registered\n");
1835 
1836         /* schedule device detection */
1837         wiimote_schedule(wdata);
1838 
1839         return 0;
1840 
1841 err_free:
1842         wiimote_destroy(wdata);
1843         return ret;
1844 
1845 err_ext:
1846         device_remove_file(&wdata->hdev->dev, &dev_attr_extension);
1847 err_close:
1848         hid_hw_close(hdev);
1849 err_stop:
1850         hid_hw_stop(hdev);
1851 err:
1852         input_free_device(wdata->ir);
1853         input_free_device(wdata->accel);
1854         kfree(wdata);
1855         return ret;
1856 }
1857 
1858 static void wiimote_hid_remove(struct hid_device *hdev)
1859 {
1860         struct wiimote_data *wdata = hid_get_drvdata(hdev);
1861 
1862         hid_info(hdev, "Device removed\n");
1863         wiimote_destroy(wdata);
1864 }
1865 
1866 static const struct hid_device_id wiimote_hid_devices[] = {
1867         { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_NINTENDO,
1868                                 USB_DEVICE_ID_NINTENDO_WIIMOTE) },
1869         { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_NINTENDO,
1870                                 USB_DEVICE_ID_NINTENDO_WIIMOTE2) },
1871         { }
1872 };
1873 MODULE_DEVICE_TABLE(hid, wiimote_hid_devices);
1874 
1875 static struct hid_driver wiimote_hid_driver = {
1876         .name = "wiimote",
1877         .id_table = wiimote_hid_devices,
1878         .probe = wiimote_hid_probe,
1879         .remove = wiimote_hid_remove,
1880         .raw_event = wiimote_hid_event,
1881 };
1882 module_hid_driver(wiimote_hid_driver);
1883 
1884 MODULE_LICENSE("GPL");
1885 MODULE_AUTHOR("David Herrmann <dh.herrmann@gmail.com>");
1886 MODULE_DESCRIPTION("Driver for Nintendo Wii / Wii U peripherals");
/* [<][>][^][v][top][bottom][index][help] */
root/drivers/hid/hid-wiimote-core.c

DEFINITIONS
