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
  48 #define WIIPROTO_FLAGS_LEDS (WIIPROTO_FLAG_LED1 | WIIPROTO_FLAG_LED2 | \
  49                                         WIIPROTO_FLAG_LED3 | WIIPROTO_FLAG_LED4)
  50 #define WIIPROTO_FLAGS_IR (WIIPROTO_FLAG_IR_BASIC | WIIPROTO_FLAG_IR_EXT | \
  51                                                         WIIPROTO_FLAG_IR_FULL)
  52
  53 /* return flag for led \num */
  54 #define WIIPROTO_FLAG_LED(num) (WIIPROTO_FLAG_LED1 << (num - 1))
  55
  56 enum wiiproto_keys {
  57         WIIPROTO_KEY_LEFT,
  58         WIIPROTO_KEY_RIGHT,
  59         WIIPROTO_KEY_UP,
  60         WIIPROTO_KEY_DOWN,
  61         WIIPROTO_KEY_PLUS,
  62         WIIPROTO_KEY_MINUS,
  63         WIIPROTO_KEY_ONE,
  64         WIIPROTO_KEY_TWO,
  65         WIIPROTO_KEY_A,
  66         WIIPROTO_KEY_B,
  67         WIIPROTO_KEY_HOME,
  68         WIIPROTO_KEY_COUNT
  69 };
  70
  71 enum wiimote_devtype {
  72         WIIMOTE_DEV_PENDING,
  73         WIIMOTE_DEV_UNKNOWN,
  74         WIIMOTE_DEV_GENERIC,
  75         WIIMOTE_DEV_GEN10,
  76         WIIMOTE_DEV_GEN20,
  77         WIIMOTE_DEV_BALANCE_BOARD,
  78         WIIMOTE_DEV_NUM,
  79 };
  80
  81 enum wiimote_exttype {
  82         WIIMOTE_EXT_NONE,
  83         WIIMOTE_EXT_UNKNOWN,
  84         WIIMOTE_EXT_NUNCHUK,
  85         WIIMOTE_EXT_CLASSIC_CONTROLLER,
  86         WIIMOTE_EXT_BALANCE_BOARD,
  87         WIIMOTE_EXT_NUM,
  88 };
  89
  90 enum wiimote_mptype {
  91         WIIMOTE_MP_NONE,
  92         WIIMOTE_MP_UNKNOWN,
  93         WIIMOTE_MP_SINGLE,
  94         WIIMOTE_MP_PASSTHROUGH_NUNCHUK,
  95         WIIMOTE_MP_PASSTHROUGH_CLASSIC,
  96 };
  97
  98 struct wiimote_buf {
  99         __u8 data[HID_MAX_BUFFER_SIZE];
 100         size_t size;
 101 };
 102
 103 struct wiimote_queue {
 104         spinlock_t lock;
 105         struct work_struct worker;
 106         __u8 head;
 107         __u8 tail;
 108         struct wiimote_buf outq[WIIMOTE_BUFSIZE];
 109 };
 110
 111 struct wiimote_state {
 112         spinlock_t lock;
 113         __u32 flags;
 114         __u8 accel_split[2];
 115         __u8 drm;
 116         __u8 devtype;
 117         __u8 exttype;
 118         __u8 mp;
 119
 120         /* synchronous cmd requests */
 121         struct mutex sync;
 122         struct completion ready;
 123         int cmd;
 124         __u32 opt;
 125
 126         /* results of synchronous requests */
 127         __u8 cmd_battery;
 128         __u8 cmd_err;
 129         __u8 *cmd_read_buf;
 130         __u8 cmd_read_size;
 131
 132         /* calibration data */
 133         __u16 calib_bboard[4][3];
 134 };
 135
 136 struct wiimote_data {
 137         struct hid_device *hdev;
 138         struct input_dev *input;
 139         struct led_classdev *leds[4];
 140         struct input_dev *accel;
 141         struct input_dev *ir;
 142         struct power_supply battery;
 143         struct input_dev *mp;
 144         struct timer_list timer;
 145         struct wiimote_ext *ext;
 146         struct wiimote_debug *debug;
 147
 148         union {
 149                 struct input_dev *input;
 150         } extension;
 151
 152         struct wiimote_queue queue;
 153         struct wiimote_state state;
 154         struct work_struct init_worker;
 155 };
 156
 157 /* wiimote modules */
 158
 159 enum wiimod_module {
 160         WIIMOD_KEYS,
 161         WIIMOD_RUMBLE,
 162         WIIMOD_BATTERY,
 163         WIIMOD_LED1,
 164         WIIMOD_LED2,
 165         WIIMOD_LED3,
 166         WIIMOD_LED4,
 167         WIIMOD_ACCEL,
 168         WIIMOD_IR,
 169         WIIMOD_NUM,
 170         WIIMOD_NULL = WIIMOD_NUM,
 171 };
 172
 173 #define WIIMOD_FLAG_INPUT               0x0001
 174 #define WIIMOD_FLAG_EXT8                0x0002
 175 #define WIIMOD_FLAG_EXT16               0x0004
 176
 177 struct wiimod_ops {
 178         __u16 flags;
 179         unsigned long arg;
 180         int (*probe) (const struct wiimod_ops *ops,
 181                       struct wiimote_data *wdata);
 182         void (*remove) (const struct wiimod_ops *ops,
 183                         struct wiimote_data *wdata);
 184
 185         void (*in_keys) (struct wiimote_data *wdata, const __u8 *keys);
 186         void (*in_accel) (struct wiimote_data *wdata, const __u8 *accel);
 187         void (*in_ir) (struct wiimote_data *wdata, const __u8 *ir, bool packed,
 188                        unsigned int id);
 189         void (*in_mp) (struct wiimote_data *wdata, const __u8 *mp);
 190         void (*in_ext) (struct wiimote_data *wdata, const __u8 *ext);
 191 };
 192
 193 extern const struct wiimod_ops *wiimod_table[WIIMOD_NUM];
 194 extern const struct wiimod_ops *wiimod_ext_table[WIIMOTE_EXT_NUM];
 195 extern const struct wiimod_ops wiimod_mp;
 196
 197 /* wiimote requests */
 198
 199 enum wiiproto_reqs {
 200         WIIPROTO_REQ_NULL = 0x0,
 201         WIIPROTO_REQ_RUMBLE = 0x10,
 202         WIIPROTO_REQ_LED = 0x11,
 203         WIIPROTO_REQ_DRM = 0x12,
 204         WIIPROTO_REQ_IR1 = 0x13,
 205         WIIPROTO_REQ_SREQ = 0x15,
 206         WIIPROTO_REQ_WMEM = 0x16,
 207         WIIPROTO_REQ_RMEM = 0x17,
 208         WIIPROTO_REQ_IR2 = 0x1a,
 209         WIIPROTO_REQ_STATUS = 0x20,
 210         WIIPROTO_REQ_DATA = 0x21,
 211         WIIPROTO_REQ_RETURN = 0x22,
 212
 213         /* DRM_K: BB*2 */
 214         WIIPROTO_REQ_DRM_K = 0x30,
 215
 216         /* DRM_KA: BB*2 AA*3 */
 217         WIIPROTO_REQ_DRM_KA = 0x31,
 218
 219         /* DRM_KE: BB*2 EE*8 */
 220         WIIPROTO_REQ_DRM_KE = 0x32,
 221
 222         /* DRM_KAI: BB*2 AA*3 II*12 */
 223         WIIPROTO_REQ_DRM_KAI = 0x33,
 224
 225         /* DRM_KEE: BB*2 EE*19 */
 226         WIIPROTO_REQ_DRM_KEE = 0x34,
 227
 228         /* DRM_KAE: BB*2 AA*3 EE*16 */
 229         WIIPROTO_REQ_DRM_KAE = 0x35,
 230
 231         /* DRM_KIE: BB*2 II*10 EE*9 */
 232         WIIPROTO_REQ_DRM_KIE = 0x36,
 233
 234         /* DRM_KAIE: BB*2 AA*3 II*10 EE*6 */
 235         WIIPROTO_REQ_DRM_KAIE = 0x37,
 236
 237         /* DRM_E: EE*21 */
 238         WIIPROTO_REQ_DRM_E = 0x3d,
 239
 240         /* DRM_SKAI1: BB*2 AA*1 II*18 */
 241         WIIPROTO_REQ_DRM_SKAI1 = 0x3e,
 242
 243         /* DRM_SKAI2: BB*2 AA*1 II*18 */
 244         WIIPROTO_REQ_DRM_SKAI2 = 0x3f,
 245
 246         WIIPROTO_REQ_MAX
 247 };
 248
 249 #define dev_to_wii(pdev) hid_get_drvdata(container_of(pdev, struct hid_device, \
 250                                                                         dev))
 251
 252 void __wiimote_schedule(struct wiimote_data *wdata);
 253
 254 extern void wiiproto_req_drm(struct wiimote_data *wdata, __u8 drm);
 255 extern void wiiproto_req_rumble(struct wiimote_data *wdata, __u8 rumble);
 256 extern void wiiproto_req_leds(struct wiimote_data *wdata, int leds);
 257 extern void wiiproto_req_status(struct wiimote_data *wdata);
 258 extern void wiiproto_req_accel(struct wiimote_data *wdata, __u8 accel);
 259 extern void wiiproto_req_ir1(struct wiimote_data *wdata, __u8 flags);
 260 extern void wiiproto_req_ir2(struct wiimote_data *wdata, __u8 flags);
 261 extern int wiimote_cmd_write(struct wiimote_data *wdata, __u32 offset,
 262                                                 const __u8 *wmem, __u8 size);
 263 extern ssize_t wiimote_cmd_read(struct wiimote_data *wdata, __u32 offset,
 264                                                         __u8 *rmem, __u8 size);
 265
 266 #define wiiproto_req_rreg(wdata, os, sz) \
 267                                 wiiproto_req_rmem((wdata), false, (os), (sz))
 268 #define wiiproto_req_reeprom(wdata, os, sz) \
 269                                 wiiproto_req_rmem((wdata), true, (os), (sz))
 270 extern void wiiproto_req_rmem(struct wiimote_data *wdata, bool eeprom,
 271                                                 __u32 offset, __u16 size);
 272
 273 #ifdef CONFIG_HID_WIIMOTE_EXT
 274
 275 extern int wiiext_init(struct wiimote_data *wdata);
 276 extern void wiiext_deinit(struct wiimote_data *wdata);
 277 extern void wiiext_event(struct wiimote_data *wdata, bool plugged);
 278 extern bool wiiext_active(struct wiimote_data *wdata);
 279 extern void wiiext_handle(struct wiimote_data *wdata, const __u8 *payload);
 280
 281 #else
 282
 283 static inline int wiiext_init(void *u) { return 0; }
 284 static inline void wiiext_deinit(void *u) { }
 285 static inline void wiiext_event(void *u, bool p) { }
 286 static inline bool wiiext_active(void *u) { return false; }
 287 static inline void wiiext_handle(void *u, const __u8 *p) { }
 288
 289 #endif
 290
 291 #ifdef CONFIG_DEBUG_FS
 292
 293 extern int wiidebug_init(struct wiimote_data *wdata);
 294 extern void wiidebug_deinit(struct wiimote_data *wdata);
 295
 296 #else
 297
 298 static inline int wiidebug_init(void *u) { return 0; }
 299 static inline void wiidebug_deinit(void *u) { }
 300
 301 #endif
 302
 303 /* requires the state.lock spinlock to be held */
 304 static inline bool wiimote_cmd_pending(struct wiimote_data *wdata, int cmd,
 305                                                                 __u32 opt)
 306 {
 307         return wdata->state.cmd == cmd && wdata->state.opt == opt;
 308 }
 309
 310 /* requires the state.lock spinlock to be held */
 311 static inline void wiimote_cmd_complete(struct wiimote_data *wdata)
 312 {
 313         wdata->state.cmd = WIIPROTO_REQ_NULL;
 314         complete(&wdata->state.ready);
 315 }
 316
 317 /* requires the state.lock spinlock to be held */
 318 static inline void wiimote_cmd_abort(struct wiimote_data *wdata)
 319 {
 320         /* Abort synchronous request by waking up the sleeping caller. But
 321          * reset the state.cmd field to an invalid value so no further event
 322          * handlers will work with it. */
 323         wdata->state.cmd = WIIPROTO_REQ_MAX;
 324         complete(&wdata->state.ready);
 325 }
 326
 327 static inline int wiimote_cmd_acquire(struct wiimote_data *wdata)
 328 {
 329         return mutex_lock_interruptible(&wdata->state.sync) ? -ERESTARTSYS : 0;
 330 }
 331
 332 static inline void wiimote_cmd_acquire_noint(struct wiimote_data *wdata)
 333 {
 334         mutex_lock(&wdata->state.sync);
 335 }
 336
 337 /* requires the state.lock spinlock to be held */
 338 static inline void wiimote_cmd_set(struct wiimote_data *wdata, int cmd,
 339                                                                 __u32 opt)
 340 {
 341         INIT_COMPLETION(wdata->state.ready);
 342         wdata->state.cmd = cmd;
 343         wdata->state.opt = opt;
 344 }
 345
 346 static inline void wiimote_cmd_release(struct wiimote_data *wdata)
 347 {
 348         mutex_unlock(&wdata->state.sync);
 349 }
 350
 351 static inline int wiimote_cmd_wait(struct wiimote_data *wdata)
 352 {
 353         int ret;
 354
 355         /* The completion acts as implicit memory barrier so we can safely
 356          * assume that state.cmd is set on success/failure and isn't accessed
 357          * by any other thread, anymore. */
 358
 359         ret = wait_for_completion_interruptible_timeout(&wdata->state.ready, HZ);
 360         if (ret < 0)
 361                 return -ERESTARTSYS;
 362         else if (ret == 0)
 363                 return -EIO;
 364         else if (wdata->state.cmd != WIIPROTO_REQ_NULL)
 365                 return -EIO;
 366         else
 367                 return 0;
 368 }
 369
 370 static inline int wiimote_cmd_wait_noint(struct wiimote_data *wdata)
 371 {
 372         unsigned long ret;
 373
 374         /* no locking needed; see wiimote_cmd_wait() */
 375         ret = wait_for_completion_timeout(&wdata->state.ready, HZ);
 376         if (!ret)
 377                 return -EIO;
 378         else if (wdata->state.cmd != WIIPROTO_REQ_NULL)
 379                 return -EIO;
 380         else
 381                 return 0;
 382 }
 383
 384 #endif