drivers/hid/hid-wiimote.h

   1 #ifndef __HID_WIIMOTE_H
   2 #define __HID_WIIMOTE_H
   3
   4 /*
   5  * HID driver for Nintendo Wii / Wii U peripherals
   6  * Copyright (c) 2011-2013 David Herrmann <dh.herrmann@gmail.com>
   7  */
   8
   9 /*
  10  * This program is free software; you can redistribute it and/or modify it
  11  * under the terms of the GNU General Public License as published by the Free
  12  * Software Foundation; either version 2 of the License, or (at your option)
  13  * any later version.
  14  */
  15
  16 #include <linux/completion.h>
  17 #include <linux/device.h>
  18 #include <linux/hid.h>
  19 #include <linux/input.h>
  20 #include <linux/leds.h>
  21 #include <linux/module.h>
  22 #include <linux/mutex.h>
  23 #include <linux/power_supply.h>
  24 #include <linux/spinlock.h>
  25 #include <linux/timer.h>
  26
  27 #define WIIMOTE_NAME "Nintendo Wii Remote"
  28 #define WIIMOTE_BUFSIZE 32
  29
  30 #define WIIPROTO_FLAG_LED1              0x01
  31 #define WIIPROTO_FLAG_LED2              0x02
  32 #define WIIPROTO_FLAG_LED3              0x04
  33 #define WIIPROTO_FLAG_LED4              0x08
  34 #define WIIPROTO_FLAG_RUMBLE            0x10
  35 #define WIIPROTO_FLAG_ACCEL             0x20
  36 #define WIIPROTO_FLAG_IR_BASIC          0x40
  37 #define WIIPROTO_FLAG_IR_EXT            0x80
  38 #define WIIPROTO_FLAG_IR_FULL           0xc0 /* IR_BASIC | IR_EXT */
  39 #define WIIPROTO_FLAG_EXT_PLUGGED       0x0100
  40 #define WIIPROTO_FLAG_EXT_USED          0x0200
  41 #define WIIPROTO_FLAG_EXT_ACTIVE        0x0400
  42 #define WIIPROTO_FLAG_MP_PLUGGED        0x0800
  43 #define WIIPROTO_FLAG_MP_USED           0x1000
  44 #define WIIPROTO_FLAG_MP_ACTIVE         0x2000
  45 #define WIIPROTO_FLAG_EXITING           0x4000
  46 #define WIIPROTO_FLAG_DRM_LOCKED        0x8000
  47 #define WIIPROTO_FLAG_BUILTIN_MP        0x010000
  48 #define WIIPROTO_FLAG_NO_MP             0x020000
  49
  50 #define WIIPROTO_FLAGS_LEDS (WIIPROTO_FLAG_LED1 | WIIPROTO_FLAG_LED2 | \
  51                                         WIIPROTO_FLAG_LED3 | WIIPROTO_FLAG_LED4)
  52 #define WIIPROTO_FLAGS_IR (WIIPROTO_FLAG_IR_BASIC | WIIPROTO_FLAG_IR_EXT | \
  53                                                         WIIPROTO_FLAG_IR_FULL)
  54
  55 /* return flag for led \num */
  56 #define WIIPROTO_FLAG_LED(num) (WIIPROTO_FLAG_LED1 << (num - 1))
  57
  58 enum wiiproto_keys {
  59         WIIPROTO_KEY_LEFT,
  60         WIIPROTO_KEY_RIGHT,
  61         WIIPROTO_KEY_UP,
  62         WIIPROTO_KEY_DOWN,
  63         WIIPROTO_KEY_PLUS,
  64         WIIPROTO_KEY_MINUS,
  65         WIIPROTO_KEY_ONE,
  66         WIIPROTO_KEY_TWO,
  67         WIIPROTO_KEY_A,
  68         WIIPROTO_KEY_B,
  69         WIIPROTO_KEY_HOME,
  70         WIIPROTO_KEY_COUNT
  71 };
  72
  73 enum wiimote_devtype {
  74         WIIMOTE_DEV_PENDING,
  75         WIIMOTE_DEV_UNKNOWN,
  76         WIIMOTE_DEV_GENERIC,
  77         WIIMOTE_DEV_GEN10,
  78         WIIMOTE_DEV_GEN20,
  79         WIIMOTE_DEV_BALANCE_BOARD,
  80         WIIMOTE_DEV_PRO_CONTROLLER,
  81         WIIMOTE_DEV_NUM,
  82 };
  83
  84 enum wiimote_exttype {
  85         WIIMOTE_EXT_NONE,
  86         WIIMOTE_EXT_UNKNOWN,
  87         WIIMOTE_EXT_NUNCHUK,
  88         WIIMOTE_EXT_CLASSIC_CONTROLLER,
  89         WIIMOTE_EXT_BALANCE_BOARD,
  90         WIIMOTE_EXT_PRO_CONTROLLER,
  91         WIIMOTE_EXT_NUM,
  92 };
  93
  94 enum wiimote_mptype {
  95         WIIMOTE_MP_NONE,
  96         WIIMOTE_MP_UNKNOWN,
  97         WIIMOTE_MP_SINGLE,
  98         WIIMOTE_MP_PASSTHROUGH_NUNCHUK,
  99         WIIMOTE_MP_PASSTHROUGH_CLASSIC,
 100 };
 101
 102 struct wiimote_buf {
 103         __u8 data[HID_MAX_BUFFER_SIZE];
 104         size_t size;
 105 };
 106
 107 struct wiimote_queue {
 108         spinlock_t lock;
 109         struct work_struct worker;
 110         __u8 head;
 111         __u8 tail;
 112         struct wiimote_buf outq[WIIMOTE_BUFSIZE];
 113 };
 114
 115 struct wiimote_state {
 116         spinlock_t lock;
 117         __u32 flags;
 118         __u8 accel_split[2];
 119         __u8 drm;
 120         __u8 devtype;
 121         __u8 exttype;
 122         __u8 mp;
 123
 124         /* synchronous cmd requests */
 125         struct mutex sync;
 126         struct completion ready;
 127         int cmd;
 128         __u32 opt;
 129
 130         /* results of synchronous requests */
 131         __u8 cmd_battery;
 132         __u8 cmd_err;
 133         __u8 *cmd_read_buf;
 134         __u8 cmd_read_size;
 135
 136         /* calibration/cache data */
 137         __u16 calib_bboard[4][3];
 138         __u8 cache_rumble;
 139 };
 140
 141 struct wiimote_data {
 142         struct hid_device *hdev;
 143         struct input_dev *input;
 144         struct work_struct rumble_worker;
 145         struct led_classdev *leds[4];
 146         struct input_dev *accel;
 147         struct input_dev *ir;
 148         struct power_supply battery;
 149         struct input_dev *mp;
 150         struct timer_list timer;
 151         struct wiimote_debug *debug;
 152
 153         union {
 154                 struct input_dev *input;
 155         } extension;
 156
 157         struct wiimote_queue queue;
 158         struct wiimote_state state;
 159         struct work_struct init_worker;
 160 };
 161
 162 /* wiimote modules */
 163
 164 enum wiimod_module {
 165         WIIMOD_KEYS,
 166         WIIMOD_RUMBLE,
 167         WIIMOD_BATTERY,
 168         WIIMOD_LED1,
 169         WIIMOD_LED2,
 170         WIIMOD_LED3,
 171         WIIMOD_LED4,
 172         WIIMOD_ACCEL,
 173         WIIMOD_IR,
 174         WIIMOD_BUILTIN_MP,
 175         WIIMOD_NO_MP,
 176         WIIMOD_NUM,
 177         WIIMOD_NULL = WIIMOD_NUM,
 178 };
 179
 180 #define WIIMOD_FLAG_INPUT               0x0001
 181 #define WIIMOD_FLAG_EXT8                0x0002
 182 #define WIIMOD_FLAG_EXT16               0x0004
 183
 184 struct wiimod_ops {
 185         __u16 flags;
 186         unsigned long arg;
 187         int (*probe) (const struct wiimod_ops *ops,
 188                       struct wiimote_data *wdata);
 189         void (*remove) (const struct wiimod_ops *ops,
 190                         struct wiimote_data *wdata);
 191
 192         void (*in_keys) (struct wiimote_data *wdata, const __u8 *keys);
 193         void (*in_accel) (struct wiimote_data *wdata, const __u8 *accel);
 194         void (*in_ir) (struct wiimote_data *wdata, const __u8 *ir, bool packed,
 195                        unsigned int id);
 196         void (*in_mp) (struct wiimote_data *wdata, const __u8 *mp);
 197         void (*in_ext) (struct wiimote_data *wdata, const __u8 *ext);
 198 };
 199
 200 extern const struct wiimod_ops *wiimod_table[WIIMOD_NUM];
 201 extern const struct wiimod_ops *wiimod_ext_table[WIIMOTE_EXT_NUM];
 202 extern const struct wiimod_ops wiimod_mp;
 203
 204 /* wiimote requests */
 205
 206 enum wiiproto_reqs {
 207         WIIPROTO_REQ_NULL = 0x0,
 208         WIIPROTO_REQ_RUMBLE = 0x10,
 209         WIIPROTO_REQ_LED = 0x11,
 210         WIIPROTO_REQ_DRM = 0x12,
 211         WIIPROTO_REQ_IR1 = 0x13,
 212         WIIPROTO_REQ_SREQ = 0x15,
 213         WIIPROTO_REQ_WMEM = 0x16,
 214         WIIPROTO_REQ_RMEM = 0x17,
 215         WIIPROTO_REQ_IR2 = 0x1a,
 216         WIIPROTO_REQ_STATUS = 0x20,
 217         WIIPROTO_REQ_DATA = 0x21,
 218         WIIPROTO_REQ_RETURN = 0x22,
 219
 220         /* DRM_K: BB*2 */
 221         WIIPROTO_REQ_DRM_K = 0x30,
 222
 223         /* DRM_KA: BB*2 AA*3 */
 224         WIIPROTO_REQ_DRM_KA = 0x31,
 225
 226         /* DRM_KE: BB*2 EE*8 */
 227         WIIPROTO_REQ_DRM_KE = 0x32,
 228
 229         /* DRM_KAI: BB*2 AA*3 II*12 */
 230         WIIPROTO_REQ_DRM_KAI = 0x33,
 231
 232         /* DRM_KEE: BB*2 EE*19 */
 233         WIIPROTO_REQ_DRM_KEE = 0x34,
 234
 235         /* DRM_KAE: BB*2 AA*3 EE*16 */
 236         WIIPROTO_REQ_DRM_KAE = 0x35,
 237
 238         /* DRM_KIE: BB*2 II*10 EE*9 */
 239         WIIPROTO_REQ_DRM_KIE = 0x36,
 240
 241         /* DRM_KAIE: BB*2 AA*3 II*10 EE*6 */
 242         WIIPROTO_REQ_DRM_KAIE = 0x37,
 243
 244         /* DRM_E: EE*21 */
 245         WIIPROTO_REQ_DRM_E = 0x3d,
 246
 247         /* DRM_SKAI1: BB*2 AA*1 II*18 */
 248         WIIPROTO_REQ_DRM_SKAI1 = 0x3e,
 249
 250         /* DRM_SKAI2: BB*2 AA*1 II*18 */
 251         WIIPROTO_REQ_DRM_SKAI2 = 0x3f,
 252
 253         WIIPROTO_REQ_MAX
 254 };
 255
 256 #define dev_to_wii(pdev) hid_get_drvdata(container_of(pdev, struct hid_device, \
 257                                                                         dev))
 258
 259 void __wiimote_schedule(struct wiimote_data *wdata);
 260
 261 extern void wiiproto_req_drm(struct wiimote_data *wdata, __u8 drm);
 262 extern void wiiproto_req_rumble(struct wiimote_data *wdata, __u8 rumble);
 263 extern void wiiproto_req_leds(struct wiimote_data *wdata, int leds);
 264 extern void wiiproto_req_status(struct wiimote_data *wdata);
 265 extern void wiiproto_req_accel(struct wiimote_data *wdata, __u8 accel);
 266 extern void wiiproto_req_ir1(struct wiimote_data *wdata, __u8 flags);
 267 extern void wiiproto_req_ir2(struct wiimote_data *wdata, __u8 flags);
 268 extern int wiimote_cmd_write(struct wiimote_data *wdata, __u32 offset,
 269                                                 const __u8 *wmem, __u8 size);
 270 extern ssize_t wiimote_cmd_read(struct wiimote_data *wdata, __u32 offset,
 271                                                         __u8 *rmem, __u8 size);
 272
 273 #define wiiproto_req_rreg(wdata, os, sz) \
 274                                 wiiproto_req_rmem((wdata), false, (os), (sz))
 275 #define wiiproto_req_reeprom(wdata, os, sz) \
 276                                 wiiproto_req_rmem((wdata), true, (os), (sz))
 277 extern void wiiproto_req_rmem(struct wiimote_data *wdata, bool eeprom,
 278                                                 __u32 offset, __u16 size);
 279
 280 #ifdef CONFIG_DEBUG_FS
 281
 282 extern int wiidebug_init(struct wiimote_data *wdata);
 283 extern void wiidebug_deinit(struct wiimote_data *wdata);
 284
 285 #else
 286
 287 static inline int wiidebug_init(void *u) { return 0; }
 288 static inline void wiidebug_deinit(void *u) { }
 289
 290 #endif
 291
 292 /* requires the state.lock spinlock to be held */
 293 static inline bool wiimote_cmd_pending(struct wiimote_data *wdata, int cmd,
 294                                                                 __u32 opt)
 295 {
 296         return wdata->state.cmd == cmd && wdata->state.opt == opt;
 297 }
 298
 299 /* requires the state.lock spinlock to be held */
 300 static inline void wiimote_cmd_complete(struct wiimote_data *wdata)
 301 {
 302         wdata->state.cmd = WIIPROTO_REQ_NULL;
 303         complete(&wdata->state.ready);
 304 }
 305
 306 /* requires the state.lock spinlock to be held */
 307 static inline void wiimote_cmd_abort(struct wiimote_data *wdata)
 308 {
 309         /* Abort synchronous request by waking up the sleeping caller. But
 310          * reset the state.cmd field to an invalid value so no further event
 311          * handlers will work with it. */
 312         wdata->state.cmd = WIIPROTO_REQ_MAX;
 313         complete(&wdata->state.ready);
 314 }
 315
 316 static inline int wiimote_cmd_acquire(struct wiimote_data *wdata)
 317 {
 318         return mutex_lock_interruptible(&wdata->state.sync) ? -ERESTARTSYS : 0;
 319 }
 320
 321 static inline void wiimote_cmd_acquire_noint(struct wiimote_data *wdata)
 322 {
 323         mutex_lock(&wdata->state.sync);
 324 }
 325
 326 /* requires the state.lock spinlock to be held */
 327 static inline void wiimote_cmd_set(struct wiimote_data *wdata, int cmd,
 328                                                                 __u32 opt)
 329 {
 330         reinit_completion(&wdata->state.ready);
 331         wdata->state.cmd = cmd;
 332         wdata->state.opt = opt;
 333 }
 334
 335 static inline void wiimote_cmd_release(struct wiimote_data *wdata)
 336 {
 337         mutex_unlock(&wdata->state.sync);
 338 }
 339
 340 static inline int wiimote_cmd_wait(struct wiimote_data *wdata)
 341 {
 342         int ret;
 343
 344         /* The completion acts as implicit memory barrier so we can safely
 345          * assume that state.cmd is set on success/failure and isn't accessed
 346          * by any other thread, anymore. */
 347
 348         ret = wait_for_completion_interruptible_timeout(&wdata->state.ready, HZ);
 349         if (ret < 0)
 350                 return -ERESTARTSYS;
 351         else if (ret == 0)
 352                 return -EIO;
 353         else if (wdata->state.cmd != WIIPROTO_REQ_NULL)
 354                 return -EIO;
 355         else
 356                 return 0;
 357 }
 358
 359 static inline int wiimote_cmd_wait_noint(struct wiimote_data *wdata)
 360 {
 361         unsigned long ret;
 362
 363         /* no locking needed; see wiimote_cmd_wait() */
 364         ret = wait_for_completion_timeout(&wdata->state.ready, HZ);
 365         if (!ret)
 366                 return -EIO;
 367         else if (wdata->state.cmd != WIIPROTO_REQ_NULL)
 368                 return -EIO;
 369         else
 370                 return 0;
 371 }
 372
 373 #endif