drivers/hid/hid-wiimote.c

   1 /*
   2  * HID driver for Nintendo Wiimote devices
   3  * Copyright (c) 2011 David Herrmann
   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/leds.h>
  18 #include <linux/module.h>
  19 #include <linux/mutex.h>
  20 #include <linux/power_supply.h>
  21 #include <linux/spinlock.h>
  22 #include "hid-ids.h"
  23
  24 #define WIIMOTE_VERSION "0.2"
  25 #define WIIMOTE_NAME "Nintendo Wii Remote"
  26 #define WIIMOTE_BUFSIZE 32
  27
  28 struct wiimote_buf {
  29         __u8 data[HID_MAX_BUFFER_SIZE];
  30         size_t size;
  31 };
  32
  33 struct wiimote_state {
  34         spinlock_t lock;
  35         __u8 flags;
  36         __u8 accel_split[2];
  37
  38         /* synchronous cmd requests */
  39         struct mutex sync;
  40         struct completion ready;
  41         int cmd;
  42         __u32 opt;
  43
  44         /* results of synchronous requests */
  45         __u8 cmd_battery;
  46         __u8 cmd_err;
  47 };
  48
  49 struct wiimote_data {
  50         struct hid_device *hdev;
  51         struct input_dev *input;
  52         struct led_classdev *leds[4];
  53         struct input_dev *accel;
  54         struct input_dev *ir;
  55         struct power_supply battery;
  56
  57         spinlock_t qlock;
  58         __u8 head;
  59         __u8 tail;
  60         struct wiimote_buf outq[WIIMOTE_BUFSIZE];
  61         struct work_struct worker;
  62
  63         struct wiimote_state state;
  64 };
  65
  66 #define WIIPROTO_FLAG_LED1              0x01
  67 #define WIIPROTO_FLAG_LED2              0x02
  68 #define WIIPROTO_FLAG_LED3              0x04
  69 #define WIIPROTO_FLAG_LED4              0x08
  70 #define WIIPROTO_FLAG_RUMBLE            0x10
  71 #define WIIPROTO_FLAG_ACCEL             0x20
  72 #define WIIPROTO_FLAG_IR_BASIC          0x40
  73 #define WIIPROTO_FLAG_IR_EXT            0x80
  74 #define WIIPROTO_FLAG_IR_FULL           0xc0 /* IR_BASIC | IR_EXT */
  75 #define WIIPROTO_FLAGS_LEDS (WIIPROTO_FLAG_LED1 | WIIPROTO_FLAG_LED2 | \
  76                                         WIIPROTO_FLAG_LED3 | WIIPROTO_FLAG_LED4)
  77 #define WIIPROTO_FLAGS_IR (WIIPROTO_FLAG_IR_BASIC | WIIPROTO_FLAG_IR_EXT | \
  78                                                         WIIPROTO_FLAG_IR_FULL)
  79
  80 /* return flag for led \num */
  81 #define WIIPROTO_FLAG_LED(num) (WIIPROTO_FLAG_LED1 << (num - 1))
  82
  83 enum wiiproto_reqs {
  84         WIIPROTO_REQ_NULL = 0x0,
  85         WIIPROTO_REQ_RUMBLE = 0x10,
  86         WIIPROTO_REQ_LED = 0x11,
  87         WIIPROTO_REQ_DRM = 0x12,
  88         WIIPROTO_REQ_IR1 = 0x13,
  89         WIIPROTO_REQ_SREQ = 0x15,
  90         WIIPROTO_REQ_WMEM = 0x16,
  91         WIIPROTO_REQ_RMEM = 0x17,
  92         WIIPROTO_REQ_IR2 = 0x1a,
  93         WIIPROTO_REQ_STATUS = 0x20,
  94         WIIPROTO_REQ_DATA = 0x21,
  95         WIIPROTO_REQ_RETURN = 0x22,
  96         WIIPROTO_REQ_DRM_K = 0x30,
  97         WIIPROTO_REQ_DRM_KA = 0x31,
  98         WIIPROTO_REQ_DRM_KE = 0x32,
  99         WIIPROTO_REQ_DRM_KAI = 0x33,
 100         WIIPROTO_REQ_DRM_KEE = 0x34,
 101         WIIPROTO_REQ_DRM_KAE = 0x35,
 102         WIIPROTO_REQ_DRM_KIE = 0x36,
 103         WIIPROTO_REQ_DRM_KAIE = 0x37,
 104         WIIPROTO_REQ_DRM_E = 0x3d,
 105         WIIPROTO_REQ_DRM_SKAI1 = 0x3e,
 106         WIIPROTO_REQ_DRM_SKAI2 = 0x3f,
 107 };
 108
 109 enum wiiproto_keys {
 110         WIIPROTO_KEY_LEFT,
 111         WIIPROTO_KEY_RIGHT,
 112         WIIPROTO_KEY_UP,
 113         WIIPROTO_KEY_DOWN,
 114         WIIPROTO_KEY_PLUS,
 115         WIIPROTO_KEY_MINUS,
 116         WIIPROTO_KEY_ONE,
 117         WIIPROTO_KEY_TWO,
 118         WIIPROTO_KEY_A,
 119         WIIPROTO_KEY_B,
 120         WIIPROTO_KEY_HOME,
 121         WIIPROTO_KEY_COUNT
 122 };
 123
 124 static __u16 wiiproto_keymap[] = {
 125         KEY_LEFT,       /* WIIPROTO_KEY_LEFT */
 126         KEY_RIGHT,      /* WIIPROTO_KEY_RIGHT */
 127         KEY_UP,         /* WIIPROTO_KEY_UP */
 128         KEY_DOWN,       /* WIIPROTO_KEY_DOWN */
 129         KEY_NEXT,       /* WIIPROTO_KEY_PLUS */
 130         KEY_PREVIOUS,   /* WIIPROTO_KEY_MINUS */
 131         BTN_1,          /* WIIPROTO_KEY_ONE */
 132         BTN_2,          /* WIIPROTO_KEY_TWO */
 133         BTN_A,          /* WIIPROTO_KEY_A */
 134         BTN_B,          /* WIIPROTO_KEY_B */
 135         BTN_MODE,       /* WIIPROTO_KEY_HOME */
 136 };
 137
 138 static enum power_supply_property wiimote_battery_props[] = {
 139         POWER_SUPPLY_PROP_CAPACITY
 140 };
 141
 142 /* requires the state.lock spinlock to be held */
 143 static inline bool wiimote_cmd_pending(struct wiimote_data *wdata, int cmd,
 144                                                                 __u32 opt)
 145 {
 146         return wdata->state.cmd == cmd && wdata->state.opt == opt;
 147 }
 148
 149 /* requires the state.lock spinlock to be held */
 150 static inline void wiimote_cmd_complete(struct wiimote_data *wdata)
 151 {
 152         wdata->state.cmd = WIIPROTO_REQ_NULL;
 153         complete(&wdata->state.ready);
 154 }
 155
 156 static inline int wiimote_cmd_acquire(struct wiimote_data *wdata)
 157 {
 158         return mutex_lock_interruptible(&wdata->state.sync) ? -ERESTARTSYS : 0;
 159 }
 160
 161 /* requires the state.lock spinlock to be held */
 162 static inline void wiimote_cmd_set(struct wiimote_data *wdata, int cmd,
 163                                                                 __u32 opt)
 164 {
 165         INIT_COMPLETION(wdata->state.ready);
 166         wdata->state.cmd = cmd;
 167         wdata->state.opt = opt;
 168 }
 169
 170 static inline void wiimote_cmd_release(struct wiimote_data *wdata)
 171 {
 172         mutex_unlock(&wdata->state.sync);
 173 }
 174
 175 static inline int wiimote_cmd_wait(struct wiimote_data *wdata)
 176 {
 177         int ret;
 178
 179         ret = wait_for_completion_interruptible_timeout(&wdata->state.ready, HZ);
 180         if (ret < 0)
 181                 return -ERESTARTSYS;
 182         else if (ret == 0)
 183                 return -EIO;
 184         else
 185                 return 0;
 186 }
 187
 188 static ssize_t wiimote_hid_send(struct hid_device *hdev, __u8 *buffer,
 189                                                                 size_t count)
 190 {
 191         __u8 *buf;
 192         ssize_t ret;
 193
 194         if (!hdev->hid_output_raw_report)
 195                 return -ENODEV;
 196
 197         buf = kmemdup(buffer, count, GFP_KERNEL);
 198         if (!buf)
 199                 return -ENOMEM;
 200
 201         ret = hdev->hid_output_raw_report(hdev, buf, count, HID_OUTPUT_REPORT);
 202
 203         kfree(buf);
 204         return ret;
 205 }
 206
 207 static void wiimote_worker(struct work_struct *work)
 208 {
 209         struct wiimote_data *wdata = container_of(work, struct wiimote_data,
 210                                                                         worker);
 211         unsigned long flags;
 212
 213         spin_lock_irqsave(&wdata->qlock, flags);
 214
 215         while (wdata->head != wdata->tail) {
 216                 spin_unlock_irqrestore(&wdata->qlock, flags);
 217                 wiimote_hid_send(wdata->hdev, wdata->outq[wdata->tail].data,
 218                                                 wdata->outq[wdata->tail].size);
 219                 spin_lock_irqsave(&wdata->qlock, flags);
 220
 221                 wdata->tail = (wdata->tail + 1) % WIIMOTE_BUFSIZE;
 222         }
 223
 224         spin_unlock_irqrestore(&wdata->qlock, flags);
 225 }
 226
 227 static void wiimote_queue(struct wiimote_data *wdata, const __u8 *buffer,
 228                                                                 size_t count)
 229 {
 230         unsigned long flags;
 231         __u8 newhead;
 232
 233         if (count > HID_MAX_BUFFER_SIZE) {
 234                 hid_warn(wdata->hdev, "Sending too large output report\n");
 235                 return;
 236         }
 237
 238         /*
 239          * Copy new request into our output queue and check whether the
 240          * queue is full. If it is full, discard this request.
 241          * If it is empty we need to start a new worker that will
 242          * send out the buffer to the hid device.
 243          * If the queue is not empty, then there must be a worker
 244          * that is currently sending out our buffer and this worker
 245          * will reschedule itself until the queue is empty.
 246          */
 247
 248         spin_lock_irqsave(&wdata->qlock, flags);
 249
 250         memcpy(wdata->outq[wdata->head].data, buffer, count);
 251         wdata->outq[wdata->head].size = count;
 252         newhead = (wdata->head + 1) % WIIMOTE_BUFSIZE;
 253
 254         if (wdata->head == wdata->tail) {
 255                 wdata->head = newhead;
 256                 schedule_work(&wdata->worker);
 257         } else if (newhead != wdata->tail) {
 258                 wdata->head = newhead;
 259         } else {
 260                 hid_warn(wdata->hdev, "Output queue is full");
 261         }
 262
 263         spin_unlock_irqrestore(&wdata->qlock, flags);
 264 }
 265
 266 /*
 267  * This sets the rumble bit on the given output report if rumble is
 268  * currently enabled.
 269  * \cmd1 must point to the second byte in the output report => &cmd[1]
 270  * This must be called on nearly every output report before passing it
 271  * into the output queue!
 272  */
 273 static inline void wiiproto_keep_rumble(struct wiimote_data *wdata, __u8 *cmd1)
 274 {
 275         if (wdata->state.flags & WIIPROTO_FLAG_RUMBLE)
 276                 *cmd1 |= 0x01;
 277 }
 278
 279 static void wiiproto_req_rumble(struct wiimote_data *wdata, __u8 rumble)
 280 {
 281         __u8 cmd[2];
 282
 283         rumble = !!rumble;
 284         if (rumble == !!(wdata->state.flags & WIIPROTO_FLAG_RUMBLE))
 285                 return;
 286
 287         if (rumble)
 288                 wdata->state.flags |= WIIPROTO_FLAG_RUMBLE;
 289         else
 290                 wdata->state.flags &= ~WIIPROTO_FLAG_RUMBLE;
 291
 292         cmd[0] = WIIPROTO_REQ_RUMBLE;
 293         cmd[1] = 0;
 294
 295         wiiproto_keep_rumble(wdata, &cmd[1]);
 296         wiimote_queue(wdata, cmd, sizeof(cmd));
 297 }
 298
 299 static void wiiproto_req_leds(struct wiimote_data *wdata, int leds)
 300 {
 301         __u8 cmd[2];
 302
 303         leds &= WIIPROTO_FLAGS_LEDS;
 304         if ((wdata->state.flags & WIIPROTO_FLAGS_LEDS) == leds)
 305                 return;
 306         wdata->state.flags = (wdata->state.flags & ~WIIPROTO_FLAGS_LEDS) | leds;
 307
 308         cmd[0] = WIIPROTO_REQ_LED;
 309         cmd[1] = 0;
 310
 311         if (leds & WIIPROTO_FLAG_LED1)
 312                 cmd[1] |= 0x10;
 313         if (leds & WIIPROTO_FLAG_LED2)
 314                 cmd[1] |= 0x20;
 315         if (leds & WIIPROTO_FLAG_LED3)
 316                 cmd[1] |= 0x40;
 317         if (leds & WIIPROTO_FLAG_LED4)
 318                 cmd[1] |= 0x80;
 319
 320         wiiproto_keep_rumble(wdata, &cmd[1]);
 321         wiimote_queue(wdata, cmd, sizeof(cmd));
 322 }
 323
 324 /*
 325  * Check what peripherals of the wiimote are currently
 326  * active and select a proper DRM that supports all of
 327  * the requested data inputs.
 328  */
 329 static __u8 select_drm(struct wiimote_data *wdata)
 330 {
 331         __u8 ir = wdata->state.flags & WIIPROTO_FLAGS_IR;
 332
 333         if (ir == WIIPROTO_FLAG_IR_BASIC) {
 334                 if (wdata->state.flags & WIIPROTO_FLAG_ACCEL)
 335                         return WIIPROTO_REQ_DRM_KAIE;
 336                 else
 337                         return WIIPROTO_REQ_DRM_KIE;
 338         } else if (ir == WIIPROTO_FLAG_IR_EXT) {
 339                 return WIIPROTO_REQ_DRM_KAI;
 340         } else if (ir == WIIPROTO_FLAG_IR_FULL) {
 341                 return WIIPROTO_REQ_DRM_SKAI1;
 342         } else {
 343                 if (wdata->state.flags & WIIPROTO_FLAG_ACCEL)
 344                         return WIIPROTO_REQ_DRM_KA;
 345                 else
 346                         return WIIPROTO_REQ_DRM_K;
 347         }
 348 }
 349
 350 static void wiiproto_req_drm(struct wiimote_data *wdata, __u8 drm)
 351 {
 352         __u8 cmd[3];
 353
 354         if (drm == WIIPROTO_REQ_NULL)
 355                 drm = select_drm(wdata);
 356
 357         cmd[0] = WIIPROTO_REQ_DRM;
 358         cmd[1] = 0;
 359         cmd[2] = drm;
 360
 361         wiiproto_keep_rumble(wdata, &cmd[1]);
 362         wiimote_queue(wdata, cmd, sizeof(cmd));
 363 }
 364
 365 static void wiiproto_req_status(struct wiimote_data *wdata)
 366 {
 367         __u8 cmd[2];
 368
 369         cmd[0] = WIIPROTO_REQ_SREQ;
 370         cmd[1] = 0;
 371
 372         wiiproto_keep_rumble(wdata, &cmd[1]);
 373         wiimote_queue(wdata, cmd, sizeof(cmd));
 374 }
 375
 376 static void wiiproto_req_accel(struct wiimote_data *wdata, __u8 accel)
 377 {
 378         accel = !!accel;
 379         if (accel == !!(wdata->state.flags & WIIPROTO_FLAG_ACCEL))
 380                 return;
 381
 382         if (accel)
 383                 wdata->state.flags |= WIIPROTO_FLAG_ACCEL;
 384         else
 385                 wdata->state.flags &= ~WIIPROTO_FLAG_ACCEL;
 386
 387         wiiproto_req_drm(wdata, WIIPROTO_REQ_NULL);
 388 }
 389
 390 static void wiiproto_req_ir1(struct wiimote_data *wdata, __u8 flags)
 391 {
 392         __u8 cmd[2];
 393
 394         cmd[0] = WIIPROTO_REQ_IR1;
 395         cmd[1] = flags;
 396
 397         wiiproto_keep_rumble(wdata, &cmd[1]);
 398         wiimote_queue(wdata, cmd, sizeof(cmd));
 399 }
 400
 401 static void wiiproto_req_ir2(struct wiimote_data *wdata, __u8 flags)
 402 {
 403         __u8 cmd[2];
 404
 405         cmd[0] = WIIPROTO_REQ_IR2;
 406         cmd[1] = flags;
 407
 408         wiiproto_keep_rumble(wdata, &cmd[1]);
 409         wiimote_queue(wdata, cmd, sizeof(cmd));
 410 }
 411
 412 #define wiiproto_req_wreg(wdata, os, buf, sz) \
 413                         wiiproto_req_wmem((wdata), false, (os), (buf), (sz))
 414
 415 #define wiiproto_req_weeprom(wdata, os, buf, sz) \
 416                         wiiproto_req_wmem((wdata), true, (os), (buf), (sz))
 417
 418 static void wiiproto_req_wmem(struct wiimote_data *wdata, bool eeprom,
 419                                 __u32 offset, const __u8 *buf, __u8 size)
 420 {
 421         __u8 cmd[22];
 422
 423         if (size > 16 || size == 0) {
 424                 hid_warn(wdata->hdev, "Invalid length %d wmem request\n", size);
 425                 return;
 426         }
 427
 428         memset(cmd, 0, sizeof(cmd));
 429         cmd[0] = WIIPROTO_REQ_WMEM;
 430         cmd[2] = (offset >> 16) & 0xff;
 431         cmd[3] = (offset >> 8) & 0xff;
 432         cmd[4] = offset & 0xff;
 433         cmd[5] = size;
 434         memcpy(&cmd[6], buf, size);
 435
 436         if (!eeprom)
 437                 cmd[1] |= 0x04;
 438
 439         wiiproto_keep_rumble(wdata, &cmd[1]);
 440         wiimote_queue(wdata, cmd, sizeof(cmd));
 441 }
 442
 443 /* requries the cmd-mutex to be held */
 444 static int wiimote_cmd_write(struct wiimote_data *wdata, __u32 offset,
 445                                                 const __u8 *wmem, __u8 size)
 446 {
 447         unsigned long flags;
 448         int ret;
 449
 450         spin_lock_irqsave(&wdata->state.lock, flags);
 451         wiimote_cmd_set(wdata, WIIPROTO_REQ_WMEM, 0);
 452         wiiproto_req_wreg(wdata, offset, wmem, size);
 453         spin_unlock_irqrestore(&wdata->state.lock, flags);
 454
 455         ret = wiimote_cmd_wait(wdata);
 456         if (!ret && wdata->state.cmd_err)
 457                 ret = -EIO;
 458
 459         return ret;
 460 }
 461
 462 static int wiimote_battery_get_property(struct power_supply *psy,
 463                                                 enum power_supply_property psp,
 464                                                 union power_supply_propval *val)
 465 {
 466         struct wiimote_data *wdata = container_of(psy,
 467                                                 struct wiimote_data, battery);
 468         int ret = 0, state;
 469         unsigned long flags;
 470
 471         ret = wiimote_cmd_acquire(wdata);
 472         if (ret)
 473                 return ret;
 474
 475         spin_lock_irqsave(&wdata->state.lock, flags);
 476         wiimote_cmd_set(wdata, WIIPROTO_REQ_SREQ, 0);
 477         wiiproto_req_status(wdata);
 478         spin_unlock_irqrestore(&wdata->state.lock, flags);
 479
 480         ret = wiimote_cmd_wait(wdata);
 481         state = wdata->state.cmd_battery;
 482         wiimote_cmd_release(wdata);
 483
 484         if (ret)
 485                 return ret;
 486
 487         switch (psp) {
 488                 case POWER_SUPPLY_PROP_CAPACITY:
 489                         val->intval = state * 100 / 255;
 490                         break;
 491                 default:
 492                         ret = -EINVAL;
 493                         break;
 494         }
 495
 496         return ret;
 497 }
 498
 499 static int wiimote_init_ir(struct wiimote_data *wdata, __u16 mode)
 500 {
 501         int ret;
 502         unsigned long flags;
 503         __u8 format = 0;
 504         static const __u8 data_enable[] = { 0x01 };
 505         static const __u8 data_sens1[] = { 0x02, 0x00, 0x00, 0x71, 0x01,
 506                                                 0x00, 0xaa, 0x00, 0x64 };
 507         static const __u8 data_sens2[] = { 0x63, 0x03 };
 508         static const __u8 data_fin[] = { 0x08 };
 509
 510         spin_lock_irqsave(&wdata->state.lock, flags);
 511
 512         if (mode == (wdata->state.flags & WIIPROTO_FLAGS_IR)) {
 513                 spin_unlock_irqrestore(&wdata->state.lock, flags);
 514                 return 0;
 515         }
 516
 517         if (mode == 0) {
 518                 wdata->state.flags &= ~WIIPROTO_FLAGS_IR;
 519                 wiiproto_req_ir1(wdata, 0);
 520                 wiiproto_req_ir2(wdata, 0);
 521                 wiiproto_req_drm(wdata, WIIPROTO_REQ_NULL);
 522                 spin_unlock_irqrestore(&wdata->state.lock, flags);
 523                 return 0;
 524         }
 525
 526         spin_unlock_irqrestore(&wdata->state.lock, flags);
 527
 528         ret = wiimote_cmd_acquire(wdata);
 529         if (ret)
 530                 return ret;
 531
 532         /* send PIXEL CLOCK ENABLE cmd first */
 533         spin_lock_irqsave(&wdata->state.lock, flags);
 534         wiimote_cmd_set(wdata, WIIPROTO_REQ_IR1, 0);
 535         wiiproto_req_ir1(wdata, 0x06);
 536         spin_unlock_irqrestore(&wdata->state.lock, flags);
 537
 538         ret = wiimote_cmd_wait(wdata);
 539         if (ret)
 540                 goto unlock;
 541         if (wdata->state.cmd_err) {
 542                 ret = -EIO;
 543                 goto unlock;
 544         }
 545
 546         /* enable IR LOGIC */
 547         spin_lock_irqsave(&wdata->state.lock, flags);
 548         wiimote_cmd_set(wdata, WIIPROTO_REQ_IR2, 0);
 549         wiiproto_req_ir2(wdata, 0x06);
 550         spin_unlock_irqrestore(&wdata->state.lock, flags);
 551
 552         ret = wiimote_cmd_wait(wdata);
 553         if (ret)
 554                 goto unlock;
 555         if (wdata->state.cmd_err) {
 556                 ret = -EIO;
 557                 goto unlock;
 558         }
 559
 560         /* enable IR cam but do not make it send data, yet */
 561         ret = wiimote_cmd_write(wdata, 0xb00030, data_enable,
 562                                                         sizeof(data_enable));
 563         if (ret)
 564                 goto unlock;
 565
 566         /* write first sensitivity block */
 567         ret = wiimote_cmd_write(wdata, 0xb00000, data_sens1,
 568                                                         sizeof(data_sens1));
 569         if (ret)
 570                 goto unlock;
 571
 572         /* write second sensitivity block */
 573         ret = wiimote_cmd_write(wdata, 0xb0001a, data_sens2,
 574                                                         sizeof(data_sens2));
 575         if (ret)
 576                 goto unlock;
 577
 578         /* put IR cam into desired state */
 579         switch (mode) {
 580                 case WIIPROTO_FLAG_IR_FULL:
 581                         format = 5;
 582                         break;
 583                 case WIIPROTO_FLAG_IR_EXT:
 584                         format = 3;
 585                         break;
 586                 case WIIPROTO_FLAG_IR_BASIC:
 587                         format = 1;
 588                         break;
 589         }
 590         ret = wiimote_cmd_write(wdata, 0xb00033, &format, sizeof(format));
 591         if (ret)
 592                 goto unlock;
 593
 594         /* make IR cam send data */
 595         ret = wiimote_cmd_write(wdata, 0xb00030, data_fin, sizeof(data_fin));
 596         if (ret)
 597                 goto unlock;
 598
 599         /* request new DRM mode compatible to IR mode */
 600         spin_lock_irqsave(&wdata->state.lock, flags);
 601         wdata->state.flags &= ~WIIPROTO_FLAGS_IR;
 602         wdata->state.flags |= mode & WIIPROTO_FLAGS_IR;
 603         wiiproto_req_drm(wdata, WIIPROTO_REQ_NULL);
 604         spin_unlock_irqrestore(&wdata->state.lock, flags);
 605
 606 unlock:
 607         wiimote_cmd_release(wdata);
 608         return ret;
 609 }
 610
 611 static enum led_brightness wiimote_leds_get(struct led_classdev *led_dev)
 612 {
 613         struct wiimote_data *wdata;
 614         struct device *dev = led_dev->dev->parent;
 615         int i;
 616         unsigned long flags;
 617         bool value = false;
 618
 619         wdata = hid_get_drvdata(container_of(dev, struct hid_device, dev));
 620
 621         for (i = 0; i < 4; ++i) {
 622                 if (wdata->leds[i] == led_dev) {
 623                         spin_lock_irqsave(&wdata->state.lock, flags);
 624                         value = wdata->state.flags & WIIPROTO_FLAG_LED(i + 1);
 625                         spin_unlock_irqrestore(&wdata->state.lock, flags);
 626                         break;
 627                 }
 628         }
 629
 630         return value ? LED_FULL : LED_OFF;
 631 }
 632
 633 static void wiimote_leds_set(struct led_classdev *led_dev,
 634                                                 enum led_brightness value)
 635 {
 636         struct wiimote_data *wdata;
 637         struct device *dev = led_dev->dev->parent;
 638         int i;
 639         unsigned long flags;
 640         __u8 state, flag;
 641
 642         wdata = hid_get_drvdata(container_of(dev, struct hid_device, dev));
 643
 644         for (i = 0; i < 4; ++i) {
 645                 if (wdata->leds[i] == led_dev) {
 646                         flag = WIIPROTO_FLAG_LED(i + 1);
 647                         spin_lock_irqsave(&wdata->state.lock, flags);
 648                         state = wdata->state.flags;
 649                         if (value == LED_OFF)
 650                                 wiiproto_req_leds(wdata, state & ~flag);
 651                         else
 652                                 wiiproto_req_leds(wdata, state | flag);
 653                         spin_unlock_irqrestore(&wdata->state.lock, flags);
 654                         break;
 655                 }
 656         }
 657 }
 658
 659 static int wiimote_ff_play(struct input_dev *dev, void *data,
 660                                                         struct ff_effect *eff)
 661 {
 662         struct wiimote_data *wdata = input_get_drvdata(dev);
 663         __u8 value;
 664         unsigned long flags;
 665
 666         /*
 667          * The wiimote supports only a single rumble motor so if any magnitude
 668          * is set to non-zero then we start the rumble motor. If both are set to
 669          * zero, we stop the rumble motor.
 670          */
 671
 672         if (eff->u.rumble.strong_magnitude || eff->u.rumble.weak_magnitude)
 673                 value = 1;
 674         else
 675                 value = 0;
 676
 677         spin_lock_irqsave(&wdata->state.lock, flags);
 678         wiiproto_req_rumble(wdata, value);
 679         spin_unlock_irqrestore(&wdata->state.lock, flags);
 680
 681         return 0;
 682 }
 683
 684 static int wiimote_input_open(struct input_dev *dev)
 685 {
 686         struct wiimote_data *wdata = input_get_drvdata(dev);
 687
 688         return hid_hw_open(wdata->hdev);
 689 }
 690
 691 static void wiimote_input_close(struct input_dev *dev)
 692 {
 693         struct wiimote_data *wdata = input_get_drvdata(dev);
 694
 695         hid_hw_close(wdata->hdev);
 696 }
 697
 698 static int wiimote_accel_open(struct input_dev *dev)
 699 {
 700         struct wiimote_data *wdata = input_get_drvdata(dev);
 701         int ret;
 702         unsigned long flags;
 703
 704         ret = hid_hw_open(wdata->hdev);
 705         if (ret)
 706                 return ret;
 707
 708         spin_lock_irqsave(&wdata->state.lock, flags);
 709         wiiproto_req_accel(wdata, true);
 710         spin_unlock_irqrestore(&wdata->state.lock, flags);
 711
 712         return 0;
 713 }
 714
 715 static void wiimote_accel_close(struct input_dev *dev)
 716 {
 717         struct wiimote_data *wdata = input_get_drvdata(dev);
 718         unsigned long flags;
 719
 720         spin_lock_irqsave(&wdata->state.lock, flags);
 721         wiiproto_req_accel(wdata, false);
 722         spin_unlock_irqrestore(&wdata->state.lock, flags);
 723
 724         hid_hw_close(wdata->hdev);
 725 }
 726
 727 static int wiimote_ir_open(struct input_dev *dev)
 728 {
 729         struct wiimote_data *wdata = input_get_drvdata(dev);
 730         int ret;
 731
 732         ret = hid_hw_open(wdata->hdev);
 733         if (ret)
 734                 return ret;
 735
 736         ret = wiimote_init_ir(wdata, WIIPROTO_FLAG_IR_BASIC);
 737         if (ret) {
 738                 hid_hw_close(wdata->hdev);
 739                 return ret;
 740         }
 741
 742         return 0;
 743 }
 744
 745 static void wiimote_ir_close(struct input_dev *dev)
 746 {
 747         struct wiimote_data *wdata = input_get_drvdata(dev);
 748
 749         wiimote_init_ir(wdata, 0);
 750         hid_hw_close(wdata->hdev);
 751 }
 752
 753 static void handler_keys(struct wiimote_data *wdata, const __u8 *payload)
 754 {
 755         input_report_key(wdata->input, wiiproto_keymap[WIIPROTO_KEY_LEFT],
 756                                                         !!(payload[0] & 0x01));
 757         input_report_key(wdata->input, wiiproto_keymap[WIIPROTO_KEY_RIGHT],
 758                                                         !!(payload[0] & 0x02));
 759         input_report_key(wdata->input, wiiproto_keymap[WIIPROTO_KEY_DOWN],
 760                                                         !!(payload[0] & 0x04));
 761         input_report_key(wdata->input, wiiproto_keymap[WIIPROTO_KEY_UP],
 762                                                         !!(payload[0] & 0x08));
 763         input_report_key(wdata->input, wiiproto_keymap[WIIPROTO_KEY_PLUS],
 764                                                         !!(payload[0] & 0x10));
 765         input_report_key(wdata->input, wiiproto_keymap[WIIPROTO_KEY_TWO],
 766                                                         !!(payload[1] & 0x01));
 767         input_report_key(wdata->input, wiiproto_keymap[WIIPROTO_KEY_ONE],
 768                                                         !!(payload[1] & 0x02));
 769         input_report_key(wdata->input, wiiproto_keymap[WIIPROTO_KEY_B],
 770                                                         !!(payload[1] & 0x04));
 771         input_report_key(wdata->input, wiiproto_keymap[WIIPROTO_KEY_A],
 772                                                         !!(payload[1] & 0x08));
 773         input_report_key(wdata->input, wiiproto_keymap[WIIPROTO_KEY_MINUS],
 774                                                         !!(payload[1] & 0x10));
 775         input_report_key(wdata->input, wiiproto_keymap[WIIPROTO_KEY_HOME],
 776                                                         !!(payload[1] & 0x80));
 777         input_sync(wdata->input);
 778 }
 779
 780 static void handler_accel(struct wiimote_data *wdata, const __u8 *payload)
 781 {
 782         __u16 x, y, z;
 783
 784         if (!(wdata->state.flags & WIIPROTO_FLAG_ACCEL))
 785                 return;
 786
 787         /*
 788          * payload is: BB BB XX YY ZZ
 789          * Accelerometer data is encoded into 3 10bit values. XX, YY and ZZ
 790          * contain the upper 8 bits of each value. The lower 2 bits are
 791          * contained in the buttons data BB BB.
 792          * Bits 6 and 7 of the first buttons byte BB is the lower 2 bits of the
 793          * X accel value. Bit 5 of the second buttons byte is the 2nd bit of Y
 794          * accel value and bit 6 is the second bit of the Z value.
 795          * The first bit of Y and Z values is not available and always set to 0.
 796          * 0x200 is returned on no movement.
 797          */
 798
 799         x = payload[2] << 2;
 800         y = payload[3] << 2;
 801         z = payload[4] << 2;
 802
 803         x |= (payload[0] >> 5) & 0x3;
 804         y |= (payload[1] >> 4) & 0x2;
 805         z |= (payload[1] >> 5) & 0x2;
 806
 807         input_report_abs(wdata->accel, ABS_RX, x - 0x200);
 808         input_report_abs(wdata->accel, ABS_RY, y - 0x200);
 809         input_report_abs(wdata->accel, ABS_RZ, z - 0x200);
 810         input_sync(wdata->accel);
 811 }
 812
 813 #define ir_to_input0(wdata, ir, packed) __ir_to_input((wdata), (ir), (packed), \
 814                                                         ABS_HAT0X, ABS_HAT0Y)
 815 #define ir_to_input1(wdata, ir, packed) __ir_to_input((wdata), (ir), (packed), \
 816                                                         ABS_HAT1X, ABS_HAT1Y)
 817 #define ir_to_input2(wdata, ir, packed) __ir_to_input((wdata), (ir), (packed), \
 818                                                         ABS_HAT2X, ABS_HAT2Y)
 819 #define ir_to_input3(wdata, ir, packed) __ir_to_input((wdata), (ir), (packed), \
 820                                                         ABS_HAT3X, ABS_HAT3Y)
 821
 822 static void __ir_to_input(struct wiimote_data *wdata, const __u8 *ir,
 823                                                 bool packed, __u8 xid, __u8 yid)
 824 {
 825         __u16 x, y;
 826
 827         if (!(wdata->state.flags & WIIPROTO_FLAGS_IR))
 828                 return;
 829
 830         /*
 831          * Basic IR data is encoded into 3 bytes. The first two bytes are the
 832          * upper 8 bit of the X/Y data, the 3rd byte contains the lower 2 bits
 833          * of both.
 834          * If data is packed, then the 3rd byte is put first and slightly
 835          * reordered. This allows to interleave packed and non-packed data to
 836          * have two IR sets in 5 bytes instead of 6.
 837          * The resulting 10bit X/Y values are passed to the ABS_HATXY input dev.
 838          */
 839
 840         if (packed) {
 841                 x = ir[1] << 2;
 842                 y = ir[2] << 2;
 843
 844                 x |= ir[0] & 0x3;
 845                 y |= (ir[0] >> 2) & 0x3;
 846         } else {
 847                 x = ir[0] << 2;
 848                 y = ir[1] << 2;
 849
 850                 x |= (ir[2] >> 4) & 0x3;
 851                 y |= (ir[2] >> 6) & 0x3;
 852         }
 853
 854         input_report_abs(wdata->ir, xid, x);
 855         input_report_abs(wdata->ir, yid, y);
 856 }
 857
 858 static void handler_status(struct wiimote_data *wdata, const __u8 *payload)
 859 {
 860         handler_keys(wdata, payload);
 861
 862         /* on status reports the drm is reset so we need to resend the drm */
 863         wiiproto_req_drm(wdata, WIIPROTO_REQ_NULL);
 864
 865         if (wiimote_cmd_pending(wdata, WIIPROTO_REQ_SREQ, 0)) {
 866                 wdata->state.cmd_battery = payload[5];
 867                 wiimote_cmd_complete(wdata);
 868         }
 869 }
 870
 871 static void handler_data(struct wiimote_data *wdata, const __u8 *payload)
 872 {
 873         handler_keys(wdata, payload);
 874 }
 875
 876 static void handler_return(struct wiimote_data *wdata, const __u8 *payload)
 877 {
 878         __u8 err = payload[3];
 879         __u8 cmd = payload[2];
 880
 881         handler_keys(wdata, payload);
 882
 883         if (wiimote_cmd_pending(wdata, cmd, 0)) {
 884                 wdata->state.cmd_err = err;
 885                 wiimote_cmd_complete(wdata);
 886         } else if (err) {
 887                 hid_warn(wdata->hdev, "Remote error %hhu on req %hhu\n", err,
 888                                                                         cmd);
 889         }
 890 }
 891
 892 static void handler_drm_KA(struct wiimote_data *wdata, const __u8 *payload)
 893 {
 894         handler_keys(wdata, payload);
 895         handler_accel(wdata, payload);
 896 }
 897
 898 static void handler_drm_KE(struct wiimote_data *wdata, const __u8 *payload)
 899 {
 900         handler_keys(wdata, payload);
 901 }
 902
 903 static void handler_drm_KAI(struct wiimote_data *wdata, const __u8 *payload)
 904 {
 905         handler_keys(wdata, payload);
 906         handler_accel(wdata, payload);
 907         ir_to_input0(wdata, &payload[5], false);
 908         ir_to_input1(wdata, &payload[8], false);
 909         ir_to_input2(wdata, &payload[11], false);
 910         ir_to_input3(wdata, &payload[14], false);
 911         input_sync(wdata->ir);
 912 }
 913
 914 static void handler_drm_KEE(struct wiimote_data *wdata, const __u8 *payload)
 915 {
 916         handler_keys(wdata, payload);
 917 }
 918
 919 static void handler_drm_KIE(struct wiimote_data *wdata, const __u8 *payload)
 920 {
 921         handler_keys(wdata, payload);
 922         ir_to_input0(wdata, &payload[2], false);
 923         ir_to_input1(wdata, &payload[4], true);
 924         ir_to_input2(wdata, &payload[7], false);
 925         ir_to_input3(wdata, &payload[9], true);
 926         input_sync(wdata->ir);
 927 }
 928
 929 static void handler_drm_KAE(struct wiimote_data *wdata, const __u8 *payload)
 930 {
 931         handler_keys(wdata, payload);
 932         handler_accel(wdata, payload);
 933 }
 934
 935 static void handler_drm_KAIE(struct wiimote_data *wdata, const __u8 *payload)
 936 {
 937         handler_keys(wdata, payload);
 938         handler_accel(wdata, payload);
 939         ir_to_input0(wdata, &payload[5], false);
 940         ir_to_input1(wdata, &payload[7], true);
 941         ir_to_input2(wdata, &payload[10], false);
 942         ir_to_input3(wdata, &payload[12], true);
 943         input_sync(wdata->ir);
 944 }
 945
 946 static void handler_drm_E(struct wiimote_data *wdata, const __u8 *payload)
 947 {
 948 }
 949
 950 static void handler_drm_SKAI1(struct wiimote_data *wdata, const __u8 *payload)
 951 {
 952         handler_keys(wdata, payload);
 953
 954         wdata->state.accel_split[0] = payload[2];
 955         wdata->state.accel_split[1] = (payload[0] >> 1) & (0x10 | 0x20);
 956         wdata->state.accel_split[1] |= (payload[1] << 1) & (0x40 | 0x80);
 957
 958         ir_to_input0(wdata, &payload[3], false);
 959         ir_to_input1(wdata, &payload[12], false);
 960         input_sync(wdata->ir);
 961 }
 962
 963 static void handler_drm_SKAI2(struct wiimote_data *wdata, const __u8 *payload)
 964 {
 965         __u8 buf[5];
 966
 967         handler_keys(wdata, payload);
 968
 969         wdata->state.accel_split[1] |= (payload[0] >> 5) & (0x01 | 0x02);
 970         wdata->state.accel_split[1] |= (payload[1] >> 3) & (0x04 | 0x08);
 971
 972         buf[0] = 0;
 973         buf[1] = 0;
 974         buf[2] = wdata->state.accel_split[0];
 975         buf[3] = payload[2];
 976         buf[4] = wdata->state.accel_split[1];
 977         handler_accel(wdata, buf);
 978
 979         ir_to_input2(wdata, &payload[3], false);
 980         ir_to_input3(wdata, &payload[12], false);
 981         input_sync(wdata->ir);
 982 }
 983
 984 struct wiiproto_handler {
 985         __u8 id;
 986         size_t size;
 987         void (*func)(struct wiimote_data *wdata, const __u8 *payload);
 988 };
 989
 990 static struct wiiproto_handler handlers[] = {
 991         { .id = WIIPROTO_REQ_STATUS, .size = 6, .func = handler_status },
 992         { .id = WIIPROTO_REQ_DATA, .size = 21, .func = handler_data },
 993         { .id = WIIPROTO_REQ_RETURN, .size = 4, .func = handler_return },
 994         { .id = WIIPROTO_REQ_DRM_K, .size = 2, .func = handler_keys },
 995         { .id = WIIPROTO_REQ_DRM_KA, .size = 5, .func = handler_drm_KA },
 996         { .id = WIIPROTO_REQ_DRM_KE, .size = 10, .func = handler_drm_KE },
 997         { .id = WIIPROTO_REQ_DRM_KAI, .size = 17, .func = handler_drm_KAI },
 998         { .id = WIIPROTO_REQ_DRM_KEE, .size = 21, .func = handler_drm_KEE },
 999         { .id = WIIPROTO_REQ_DRM_KAE, .size = 21, .func = handler_drm_KAE },
1000         { .id = WIIPROTO_REQ_DRM_KIE, .size = 21, .func = handler_drm_KIE },
1001         { .id = WIIPROTO_REQ_DRM_KAIE, .size = 21, .func = handler_drm_KAIE },
1002         { .id = WIIPROTO_REQ_DRM_E, .size = 21, .func = handler_drm_E },
1003         { .id = WIIPROTO_REQ_DRM_SKAI1, .size = 21, .func = handler_drm_SKAI1 },
1004         { .id = WIIPROTO_REQ_DRM_SKAI2, .size = 21, .func = handler_drm_SKAI2 },
1005         { .id = 0 }
1006 };
1007
1008 static int wiimote_hid_event(struct hid_device *hdev, struct hid_report *report,
1009                                                         u8 *raw_data, int size)
1010 {
1011         struct wiimote_data *wdata = hid_get_drvdata(hdev);
1012         struct wiiproto_handler *h;
1013         int i;
1014         unsigned long flags;
1015         bool handled = false;
1016
1017         if (size < 1)
1018                 return -EINVAL;
1019
1020         spin_lock_irqsave(&wdata->state.lock, flags);
1021
1022         for (i = 0; handlers[i].id; ++i) {
1023                 h = &handlers[i];
1024                 if (h->id == raw_data[0] && h->size < size) {
1025                         h->func(wdata, &raw_data[1]);
1026                         handled = true;
1027                 }
1028         }
1029
1030         if (!handled)
1031                 hid_warn(hdev, "Unhandled report %hhu size %d\n", raw_data[0],
1032                                                                         size);
1033
1034         spin_unlock_irqrestore(&wdata->state.lock, flags);
1035
1036         return 0;
1037 }
1038
1039 static void wiimote_leds_destroy(struct wiimote_data *wdata)
1040 {
1041         int i;
1042         struct led_classdev *led;
1043
1044         for (i = 0; i < 4; ++i) {
1045                 if (wdata->leds[i]) {
1046                         led = wdata->leds[i];
1047                         wdata->leds[i] = NULL;
1048                         led_classdev_unregister(led);
1049                         kfree(led);
1050                 }
1051         }
1052 }
1053
1054 static int wiimote_leds_create(struct wiimote_data *wdata)
1055 {
1056         int i, ret;
1057         struct device *dev = &wdata->hdev->dev;
1058         size_t namesz = strlen(dev_name(dev)) + 9;
1059         struct led_classdev *led;
1060         char *name;
1061
1062         for (i = 0; i < 4; ++i) {
1063                 led = kzalloc(sizeof(struct led_classdev) + namesz, GFP_KERNEL);
1064                 if (!led) {
1065                         ret = -ENOMEM;
1066                         goto err;
1067                 }
1068                 name = (void*)&led[1];
1069                 snprintf(name, namesz, "%s:blue:p%d", dev_name(dev), i);
1070                 led->name = name;
1071                 led->brightness = 0;
1072                 led->max_brightness = 1;
1073                 led->brightness_get = wiimote_leds_get;
1074                 led->brightness_set = wiimote_leds_set;
1075
1076                 ret = led_classdev_register(dev, led);
1077                 if (ret) {
1078                         kfree(led);
1079                         goto err;
1080                 }
1081                 wdata->leds[i] = led;
1082         }
1083
1084         return 0;
1085
1086 err:
1087         wiimote_leds_destroy(wdata);
1088         return ret;
1089 }
1090
1091 static struct wiimote_data *wiimote_create(struct hid_device *hdev)
1092 {
1093         struct wiimote_data *wdata;
1094         int i;
1095
1096         wdata = kzalloc(sizeof(*wdata), GFP_KERNEL);
1097         if (!wdata)
1098                 return NULL;
1099
1100         wdata->input = input_allocate_device();
1101         if (!wdata->input)
1102                 goto err;
1103
1104         wdata->hdev = hdev;
1105         hid_set_drvdata(hdev, wdata);
1106
1107         input_set_drvdata(wdata->input, wdata);
1108         wdata->input->open = wiimote_input_open;
1109         wdata->input->close = wiimote_input_close;
1110         wdata->input->dev.parent = &wdata->hdev->dev;
1111         wdata->input->id.bustype = wdata->hdev->bus;
1112         wdata->input->id.vendor = wdata->hdev->vendor;
1113         wdata->input->id.product = wdata->hdev->product;
1114         wdata->input->id.version = wdata->hdev->version;
1115         wdata->input->name = WIIMOTE_NAME;
1116
1117         set_bit(EV_KEY, wdata->input->evbit);
1118         for (i = 0; i < WIIPROTO_KEY_COUNT; ++i)
1119                 set_bit(wiiproto_keymap[i], wdata->input->keybit);
1120
1121         set_bit(FF_RUMBLE, wdata->input->ffbit);
1122         if (input_ff_create_memless(wdata->input, NULL, wiimote_ff_play))
1123                 goto err_input;
1124
1125         wdata->accel = input_allocate_device();
1126         if (!wdata->accel)
1127                 goto err_input;
1128
1129         input_set_drvdata(wdata->accel, wdata);
1130         wdata->accel->open = wiimote_accel_open;
1131         wdata->accel->close = wiimote_accel_close;
1132         wdata->accel->dev.parent = &wdata->hdev->dev;
1133         wdata->accel->id.bustype = wdata->hdev->bus;
1134         wdata->accel->id.vendor = wdata->hdev->vendor;
1135         wdata->accel->id.product = wdata->hdev->product;
1136         wdata->accel->id.version = wdata->hdev->version;
1137         wdata->accel->name = WIIMOTE_NAME " Accelerometer";
1138
1139         set_bit(EV_ABS, wdata->accel->evbit);
1140         set_bit(ABS_RX, wdata->accel->absbit);
1141         set_bit(ABS_RY, wdata->accel->absbit);
1142         set_bit(ABS_RZ, wdata->accel->absbit);
1143         input_set_abs_params(wdata->accel, ABS_RX, -500, 500, 2, 4);
1144         input_set_abs_params(wdata->accel, ABS_RY, -500, 500, 2, 4);
1145         input_set_abs_params(wdata->accel, ABS_RZ, -500, 500, 2, 4);
1146
1147         wdata->ir = input_allocate_device();
1148         if (!wdata->ir)
1149                 goto err_ir;
1150
1151         input_set_drvdata(wdata->ir, wdata);
1152         wdata->ir->open = wiimote_ir_open;
1153         wdata->ir->close = wiimote_ir_close;
1154         wdata->ir->dev.parent = &wdata->hdev->dev;
1155         wdata->ir->id.bustype = wdata->hdev->bus;
1156         wdata->ir->id.vendor = wdata->hdev->vendor;
1157         wdata->ir->id.product = wdata->hdev->product;
1158         wdata->ir->id.version = wdata->hdev->version;
1159         wdata->ir->name = WIIMOTE_NAME " IR";
1160
1161         set_bit(EV_ABS, wdata->ir->evbit);
1162         set_bit(ABS_HAT0X, wdata->ir->absbit);
1163         set_bit(ABS_HAT0Y, wdata->ir->absbit);
1164         set_bit(ABS_HAT1X, wdata->ir->absbit);
1165         set_bit(ABS_HAT1Y, wdata->ir->absbit);
1166         set_bit(ABS_HAT2X, wdata->ir->absbit);
1167         set_bit(ABS_HAT2Y, wdata->ir->absbit);
1168         set_bit(ABS_HAT3X, wdata->ir->absbit);
1169         set_bit(ABS_HAT3Y, wdata->ir->absbit);
1170         input_set_abs_params(wdata->ir, ABS_HAT0X, 0, 1023, 2, 4);
1171         input_set_abs_params(wdata->ir, ABS_HAT0Y, 0, 767, 2, 4);
1172         input_set_abs_params(wdata->ir, ABS_HAT1X, 0, 1023, 2, 4);
1173         input_set_abs_params(wdata->ir, ABS_HAT1Y, 0, 767, 2, 4);
1174         input_set_abs_params(wdata->ir, ABS_HAT2X, 0, 1023, 2, 4);
1175         input_set_abs_params(wdata->ir, ABS_HAT2Y, 0, 767, 2, 4);
1176         input_set_abs_params(wdata->ir, ABS_HAT3X, 0, 1023, 2, 4);
1177         input_set_abs_params(wdata->ir, ABS_HAT3Y, 0, 767, 2, 4);
1178
1179         spin_lock_init(&wdata->qlock);
1180         INIT_WORK(&wdata->worker, wiimote_worker);
1181
1182         spin_lock_init(&wdata->state.lock);
1183         init_completion(&wdata->state.ready);
1184         mutex_init(&wdata->state.sync);
1185
1186         return wdata;
1187
1188 err_ir:
1189         input_free_device(wdata->accel);
1190 err_input:
1191         input_free_device(wdata->input);
1192 err:
1193         kfree(wdata);
1194         return NULL;
1195 }
1196
1197 static void wiimote_destroy(struct wiimote_data *wdata)
1198 {
1199         wiimote_leds_destroy(wdata);
1200
1201         power_supply_unregister(&wdata->battery);
1202         input_unregister_device(wdata->accel);
1203         input_unregister_device(wdata->ir);
1204         input_unregister_device(wdata->input);
1205         cancel_work_sync(&wdata->worker);
1206         hid_hw_stop(wdata->hdev);
1207
1208         kfree(wdata);
1209 }
1210
1211 static int wiimote_hid_probe(struct hid_device *hdev,
1212                                 const struct hid_device_id *id)
1213 {
1214         struct wiimote_data *wdata;
1215         int ret;
1216
1217         wdata = wiimote_create(hdev);
1218         if (!wdata) {
1219                 hid_err(hdev, "Can't alloc device\n");
1220                 return -ENOMEM;
1221         }
1222
1223         ret = hid_parse(hdev);
1224         if (ret) {
1225                 hid_err(hdev, "HID parse failed\n");
1226                 goto err;
1227         }
1228
1229         ret = hid_hw_start(hdev, HID_CONNECT_HIDRAW);
1230         if (ret) {
1231                 hid_err(hdev, "HW start failed\n");
1232                 goto err;
1233         }
1234
1235         ret = input_register_device(wdata->accel);
1236         if (ret) {
1237                 hid_err(hdev, "Cannot register input device\n");
1238                 goto err_stop;
1239         }
1240
1241         ret = input_register_device(wdata->ir);
1242         if (ret) {
1243                 hid_err(hdev, "Cannot register input device\n");
1244                 goto err_ir;
1245         }
1246
1247         ret = input_register_device(wdata->input);
1248         if (ret) {
1249                 hid_err(hdev, "Cannot register input device\n");
1250                 goto err_input;
1251         }
1252
1253         wdata->battery.properties = wiimote_battery_props;
1254         wdata->battery.num_properties = ARRAY_SIZE(wiimote_battery_props);
1255         wdata->battery.get_property = wiimote_battery_get_property;
1256         wdata->battery.name = "wiimote_battery";
1257         wdata->battery.type = POWER_SUPPLY_TYPE_BATTERY;
1258         wdata->battery.use_for_apm = 0;
1259
1260         ret = power_supply_register(&wdata->hdev->dev, &wdata->battery);
1261         if (ret) {
1262                 hid_err(hdev, "Cannot register battery device\n");
1263                 goto err_battery;
1264         }
1265
1266         ret = wiimote_leds_create(wdata);
1267         if (ret)
1268                 goto err_free;
1269
1270         hid_info(hdev, "New device registered\n");
1271
1272         /* by default set led1 after device initialization */
1273         spin_lock_irq(&wdata->state.lock);
1274         wiiproto_req_leds(wdata, WIIPROTO_FLAG_LED1);
1275         spin_unlock_irq(&wdata->state.lock);
1276
1277         return 0;
1278
1279 err_free:
1280         wiimote_destroy(wdata);
1281         return ret;
1282
1283 err_battery:
1284         input_unregister_device(wdata->input);
1285         wdata->input = NULL;
1286 err_input:
1287         input_unregister_device(wdata->ir);
1288         wdata->ir = NULL;
1289 err_ir:
1290         input_unregister_device(wdata->accel);
1291         wdata->accel = NULL;
1292 err_stop:
1293         hid_hw_stop(hdev);
1294 err:
1295         input_free_device(wdata->ir);
1296         input_free_device(wdata->accel);
1297         input_free_device(wdata->input);
1298         kfree(wdata);
1299         return ret;
1300 }
1301
1302 static void wiimote_hid_remove(struct hid_device *hdev)
1303 {
1304         struct wiimote_data *wdata = hid_get_drvdata(hdev);
1305
1306         hid_info(hdev, "Device removed\n");
1307         wiimote_destroy(wdata);
1308 }
1309
1310 static const struct hid_device_id wiimote_hid_devices[] = {
1311         { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_NINTENDO,
1312                                 USB_DEVICE_ID_NINTENDO_WIIMOTE) },
1313         { }
1314 };
1315 MODULE_DEVICE_TABLE(hid, wiimote_hid_devices);
1316
1317 static struct hid_driver wiimote_hid_driver = {
1318         .name = "wiimote",
1319         .id_table = wiimote_hid_devices,
1320         .probe = wiimote_hid_probe,
1321         .remove = wiimote_hid_remove,
1322         .raw_event = wiimote_hid_event,
1323 };
1324
1325 static int __init wiimote_init(void)
1326 {
1327         int ret;
1328
1329         ret = hid_register_driver(&wiimote_hid_driver);
1330         if (ret)
1331                 pr_err("Can't register wiimote hid driver\n");
1332
1333         return ret;
1334 }
1335
1336 static void __exit wiimote_exit(void)
1337 {
1338         hid_unregister_driver(&wiimote_hid_driver);
1339 }
1340
1341 module_init(wiimote_init);
1342 module_exit(wiimote_exit);
1343 MODULE_LICENSE("GPL");
1344 MODULE_AUTHOR("David Herrmann <dh.herrmann@gmail.com>");
1345 MODULE_DESCRIPTION(WIIMOTE_NAME " Device Driver");
1346 MODULE_VERSION(WIIMOTE_VERSION);