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