drivers/hid/hid-wiimote.h - kernel/msm-4.9 - Gitiles

 #ifndef __HID_WIIMOTE_H
 #define __HID_WIIMOTE_H

 /*
  * HID driver for Nintendo Wii / Wii U peripherals
  * Copyright (c) 2011-2013 David Herrmann <dh.herrmann@gmail.com>
  */

 /*
  * This program is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License as published by the Free
  * Software Foundation; either version 2 of the License, or (at your option)
  * any later version.
  */

 #include <linux/completion.h>
 #include <linux/device.h>
 #include <linux/hid.h>
 #include <linux/input.h>
 #include <linux/leds.h>
 #include <linux/module.h>
 #include <linux/mutex.h>
 #include <linux/power_supply.h>
 #include <linux/spinlock.h>
 #include <linux/timer.h>

 #define WIIMOTE_NAME "Nintendo Wii Remote"
 #define WIIMOTE_BUFSIZE 32

 #define WIIPROTO_FLAG_LED1		0x01
 #define WIIPROTO_FLAG_LED2		0x02
 #define WIIPROTO_FLAG_LED3		0x04
 #define WIIPROTO_FLAG_LED4		0x08
 #define WIIPROTO_FLAG_RUMBLE		0x10
 #define WIIPROTO_FLAG_ACCEL		0x20
 #define WIIPROTO_FLAG_IR_BASIC		0x40
 #define WIIPROTO_FLAG_IR_EXT		0x80
 #define WIIPROTO_FLAG_IR_FULL		0xc0 /* IR_BASIC | IR_EXT */
 #define WIIPROTO_FLAG_EXT_PLUGGED	0x0100
 #define WIIPROTO_FLAG_EXT_USED		0x0200
 #define WIIPROTO_FLAG_EXT_ACTIVE	0x0400
 #define WIIPROTO_FLAG_MP_PLUGGED	0x0800
 #define WIIPROTO_FLAG_MP_USED		0x1000
 #define WIIPROTO_FLAG_MP_ACTIVE		0x2000
 #define WIIPROTO_FLAG_EXITING		0x4000
 #define WIIPROTO_FLAG_DRM_LOCKED	0x8000
 #define WIIPROTO_FLAG_BUILTIN_MP	0x010000
 #define WIIPROTO_FLAG_NO_MP		0x020000
 #define WIIPROTO_FLAG_PRO_CALIB_DONE	0x040000

 #define WIIPROTO_FLAGS_LEDS (WIIPROTO_FLAG_LED1 | WIIPROTO_FLAG_LED2 | \
 					WIIPROTO_FLAG_LED3 | WIIPROTO_FLAG_LED4)
 #define WIIPROTO_FLAGS_IR (WIIPROTO_FLAG_IR_BASIC | WIIPROTO_FLAG_IR_EXT | \
 							WIIPROTO_FLAG_IR_FULL)

 /* return flag for led \num */
 #define WIIPROTO_FLAG_LED(num) (WIIPROTO_FLAG_LED1 << (num - 1))

 enum wiiproto_keys {
 	WIIPROTO_KEY_LEFT,
 	WIIPROTO_KEY_RIGHT,
 	WIIPROTO_KEY_UP,
 	WIIPROTO_KEY_DOWN,
 	WIIPROTO_KEY_PLUS,
 	WIIPROTO_KEY_MINUS,
 	WIIPROTO_KEY_ONE,
 	WIIPROTO_KEY_TWO,
 	WIIPROTO_KEY_A,
 	WIIPROTO_KEY_B,
 	WIIPROTO_KEY_HOME,
 	WIIPROTO_KEY_COUNT
 };

 enum wiimote_devtype {
 	WIIMOTE_DEV_PENDING,
 	WIIMOTE_DEV_UNKNOWN,
 	WIIMOTE_DEV_GENERIC,
 	WIIMOTE_DEV_GEN10,
 	WIIMOTE_DEV_GEN20,
 	WIIMOTE_DEV_BALANCE_BOARD,
 	WIIMOTE_DEV_PRO_CONTROLLER,
 	WIIMOTE_DEV_NUM,
 };

 enum wiimote_exttype {
 	WIIMOTE_EXT_NONE,
 	WIIMOTE_EXT_UNKNOWN,
 	WIIMOTE_EXT_NUNCHUK,
 	WIIMOTE_EXT_CLASSIC_CONTROLLER,
 	WIIMOTE_EXT_BALANCE_BOARD,
 	WIIMOTE_EXT_PRO_CONTROLLER,
 	WIIMOTE_EXT_NUM,
 };

 enum wiimote_mptype {
 	WIIMOTE_MP_NONE,
 	WIIMOTE_MP_UNKNOWN,
 	WIIMOTE_MP_SINGLE,
 	WIIMOTE_MP_PASSTHROUGH_NUNCHUK,
 	WIIMOTE_MP_PASSTHROUGH_CLASSIC,
 };

 struct wiimote_buf {
 	__u8 data[HID_MAX_BUFFER_SIZE];
 	size_t size;
 };

 struct wiimote_queue {
 	spinlock_t lock;
 	struct work_struct worker;
 	__u8 head;
 	__u8 tail;
 	struct wiimote_buf outq[WIIMOTE_BUFSIZE];
 };

 struct wiimote_state {
 	spinlock_t lock;
 	__u32 flags;
 	__u8 accel_split[2];
 	__u8 drm;
 	__u8 devtype;
 	__u8 exttype;
 	__u8 mp;

 	/* synchronous cmd requests */
 	struct mutex sync;
 	struct completion ready;
 	int cmd;
 	__u32 opt;

 	/* results of synchronous requests */
 	__u8 cmd_battery;
 	__u8 cmd_err;
 	__u8 *cmd_read_buf;
 	__u8 cmd_read_size;

 	/* calibration/cache data */
 	__u16 calib_bboard[4][3];
 	__s16 calib_pro_sticks[4];
 	__u8 cache_rumble;
 };

 struct wiimote_data {
 	struct hid_device *hdev;
 	struct input_dev *input;
 	struct work_struct rumble_worker;
 	struct led_classdev *leds[4];
 	struct input_dev *accel;
 	struct input_dev *ir;
 	struct power_supply battery;
 	struct input_dev *mp;
 	struct timer_list timer;
 	struct wiimote_debug *debug;

 	union {
 		struct input_dev *input;
 	} extension;

 	struct wiimote_queue queue;
 	struct wiimote_state state;
 	struct work_struct init_worker;
 };

 /* wiimote modules */

 enum wiimod_module {
 	WIIMOD_KEYS,
 	WIIMOD_RUMBLE,
 	WIIMOD_BATTERY,
 	WIIMOD_LED1,
 	WIIMOD_LED2,
 	WIIMOD_LED3,
 	WIIMOD_LED4,
 	WIIMOD_ACCEL,
 	WIIMOD_IR,
 	WIIMOD_BUILTIN_MP,
 	WIIMOD_NO_MP,
 	WIIMOD_NUM,
 	WIIMOD_NULL = WIIMOD_NUM,
 };

 #define WIIMOD_FLAG_INPUT		0x0001
 #define WIIMOD_FLAG_EXT8		0x0002
 #define WIIMOD_FLAG_EXT16		0x0004

 struct wiimod_ops {
 	__u16 flags;
 	unsigned long arg;
 	int (*probe) (const struct wiimod_ops *ops,
 		      struct wiimote_data *wdata);
 	void (*remove) (const struct wiimod_ops *ops,
 			struct wiimote_data *wdata);

 	void (*in_keys) (struct wiimote_data *wdata, const __u8 *keys);
 	void (*in_accel) (struct wiimote_data *wdata, const __u8 *accel);
 	void (*in_ir) (struct wiimote_data *wdata, const __u8 *ir, bool packed,
 		       unsigned int id);
 	void (*in_mp) (struct wiimote_data *wdata, const __u8 *mp);
 	void (*in_ext) (struct wiimote_data *wdata, const __u8 *ext);
 };

 extern const struct wiimod_ops *wiimod_table[WIIMOD_NUM];
 extern const struct wiimod_ops *wiimod_ext_table[WIIMOTE_EXT_NUM];
 extern const struct wiimod_ops wiimod_mp;

 /* wiimote requests */

 enum wiiproto_reqs {
 	WIIPROTO_REQ_NULL = 0x0,
 	WIIPROTO_REQ_RUMBLE = 0x10,
 	WIIPROTO_REQ_LED = 0x11,
 	WIIPROTO_REQ_DRM = 0x12,
 	WIIPROTO_REQ_IR1 = 0x13,
 	WIIPROTO_REQ_SREQ = 0x15,
 	WIIPROTO_REQ_WMEM = 0x16,
 	WIIPROTO_REQ_RMEM = 0x17,
 	WIIPROTO_REQ_IR2 = 0x1a,
 	WIIPROTO_REQ_STATUS = 0x20,
 	WIIPROTO_REQ_DATA = 0x21,
 	WIIPROTO_REQ_RETURN = 0x22,

 	/* DRM_K: BB*2 */
 	WIIPROTO_REQ_DRM_K = 0x30,

 	/* DRM_KA: BB*2 AA*3 */
 	WIIPROTO_REQ_DRM_KA = 0x31,

 	/* DRM_KE: BB*2 EE*8 */
 	WIIPROTO_REQ_DRM_KE = 0x32,

 	/* DRM_KAI: BB*2 AA*3 II*12 */
 	WIIPROTO_REQ_DRM_KAI = 0x33,

 	/* DRM_KEE: BB*2 EE*19 */
 	WIIPROTO_REQ_DRM_KEE = 0x34,

 	/* DRM_KAE: BB*2 AA*3 EE*16 */
 	WIIPROTO_REQ_DRM_KAE = 0x35,

 	/* DRM_KIE: BB*2 II*10 EE*9 */
 	WIIPROTO_REQ_DRM_KIE = 0x36,

 	/* DRM_KAIE: BB*2 AA*3 II*10 EE*6 */
 	WIIPROTO_REQ_DRM_KAIE = 0x37,

 	/* DRM_E: EE*21 */
 	WIIPROTO_REQ_DRM_E = 0x3d,

 	/* DRM_SKAI1: BB*2 AA*1 II*18 */
 	WIIPROTO_REQ_DRM_SKAI1 = 0x3e,

 	/* DRM_SKAI2: BB*2 AA*1 II*18 */
 	WIIPROTO_REQ_DRM_SKAI2 = 0x3f,

 	WIIPROTO_REQ_MAX
 };

 #define dev_to_wii(pdev) hid_get_drvdata(container_of(pdev, struct hid_device, \
 									dev))

 void __wiimote_schedule(struct wiimote_data *wdata);

 extern void wiiproto_req_drm(struct wiimote_data *wdata, __u8 drm);
 extern void wiiproto_req_rumble(struct wiimote_data *wdata, __u8 rumble);
 extern void wiiproto_req_leds(struct wiimote_data *wdata, int leds);
 extern void wiiproto_req_status(struct wiimote_data *wdata);
 extern void wiiproto_req_accel(struct wiimote_data *wdata, __u8 accel);
 extern void wiiproto_req_ir1(struct wiimote_data *wdata, __u8 flags);
 extern void wiiproto_req_ir2(struct wiimote_data *wdata, __u8 flags);
 extern int wiimote_cmd_write(struct wiimote_data *wdata, __u32 offset,
 						const __u8 *wmem, __u8 size);
 extern ssize_t wiimote_cmd_read(struct wiimote_data *wdata, __u32 offset,
 							__u8 *rmem, __u8 size);

 #define wiiproto_req_rreg(wdata, os, sz) \
 				wiiproto_req_rmem((wdata), false, (os), (sz))
 #define wiiproto_req_reeprom(wdata, os, sz) \
 				wiiproto_req_rmem((wdata), true, (os), (sz))
 extern void wiiproto_req_rmem(struct wiimote_data *wdata, bool eeprom,
 						__u32 offset, __u16 size);

 #ifdef CONFIG_DEBUG_FS

 extern int wiidebug_init(struct wiimote_data *wdata);
 extern void wiidebug_deinit(struct wiimote_data *wdata);

 #else

 static inline int wiidebug_init(void *u) { return 0; }
 static inline void wiidebug_deinit(void *u) { }

 #endif

 /* requires the state.lock spinlock to be held */
 static inline bool wiimote_cmd_pending(struct wiimote_data *wdata, int cmd,
 								__u32 opt)
 {
 	return wdata->state.cmd == cmd && wdata->state.opt == opt;
 }

 /* requires the state.lock spinlock to be held */
 static inline void wiimote_cmd_complete(struct wiimote_data *wdata)
 {
 	wdata->state.cmd = WIIPROTO_REQ_NULL;
 	complete(&wdata->state.ready);
 }

 /* requires the state.lock spinlock to be held */
 static inline void wiimote_cmd_abort(struct wiimote_data *wdata)
 {
 	/* Abort synchronous request by waking up the sleeping caller. But
 	 * reset the state.cmd field to an invalid value so no further event
 	 * handlers will work with it. */
 	wdata->state.cmd = WIIPROTO_REQ_MAX;
 	complete(&wdata->state.ready);
 }

 static inline int wiimote_cmd_acquire(struct wiimote_data *wdata)
 {
 	return mutex_lock_interruptible(&wdata->state.sync) ? -ERESTARTSYS : 0;
 }

 static inline void wiimote_cmd_acquire_noint(struct wiimote_data *wdata)
 {
 	mutex_lock(&wdata->state.sync);
 }

 /* requires the state.lock spinlock to be held */
 static inline void wiimote_cmd_set(struct wiimote_data *wdata, int cmd,
 								__u32 opt)
 {
 	reinit_completion(&wdata->state.ready);
 	wdata->state.cmd = cmd;
 	wdata->state.opt = opt;
 }

 static inline void wiimote_cmd_release(struct wiimote_data *wdata)
 {
 	mutex_unlock(&wdata->state.sync);
 }

 static inline int wiimote_cmd_wait(struct wiimote_data *wdata)
 {
 	int ret;

 	/* The completion acts as implicit memory barrier so we can safely
 	 * assume that state.cmd is set on success/failure and isn't accessed
 	 * by any other thread, anymore. */

 	ret = wait_for_completion_interruptible_timeout(&wdata->state.ready, HZ);
 	if (ret < 0)
 		return -ERESTARTSYS;
 	else if (ret == 0)
 		return -EIO;
 	else if (wdata->state.cmd != WIIPROTO_REQ_NULL)
 		return -EIO;
 	else
 		return 0;
 }

 static inline int wiimote_cmd_wait_noint(struct wiimote_data *wdata)
 {
 	unsigned long ret;

 	/* no locking needed; see wiimote_cmd_wait() */
 	ret = wait_for_completion_timeout(&wdata->state.ready, HZ);
 	if (!ret)
 		return -EIO;
 	else if (wdata->state.cmd != WIIPROTO_REQ_NULL)
 		return -EIO;
 	else
 		return 0;
 }

 #endif
	#ifndef __HID_WIIMOTE_H
	#define __HID_WIIMOTE_H

	/*
	* HID driver for Nintendo Wii / Wii U peripherals
	* Copyright (c) 2011-2013 David Herrmann <dh.herrmann@gmail.com>
	*/

	/*
	* This program is free software; you can redistribute it and/or modify it
	* under the terms of the GNU General Public License as published by the Free
	* Software Foundation; either version 2 of the License, or (at your option)
	* any later version.
	*/

	#include <linux/completion.h>
	#include <linux/device.h>
	#include <linux/hid.h>
	#include <linux/input.h>
	#include <linux/leds.h>
	#include <linux/module.h>
	#include <linux/mutex.h>
	#include <linux/power_supply.h>
	#include <linux/spinlock.h>
	#include <linux/timer.h>

	#define WIIMOTE_NAME "Nintendo Wii Remote"
	#define WIIMOTE_BUFSIZE 32

	#define WIIPROTO_FLAG_LED1 0x01
	#define WIIPROTO_FLAG_LED2 0x02
	#define WIIPROTO_FLAG_LED3 0x04
	#define WIIPROTO_FLAG_LED4 0x08
	#define WIIPROTO_FLAG_RUMBLE 0x10
	#define WIIPROTO_FLAG_ACCEL 0x20
	#define WIIPROTO_FLAG_IR_BASIC 0x40
	#define WIIPROTO_FLAG_IR_EXT 0x80
	#define WIIPROTO_FLAG_IR_FULL 0xc0 /* IR_BASIC \| IR_EXT */
	#define WIIPROTO_FLAG_EXT_PLUGGED 0x0100
	#define WIIPROTO_FLAG_EXT_USED 0x0200
	#define WIIPROTO_FLAG_EXT_ACTIVE 0x0400
	#define WIIPROTO_FLAG_MP_PLUGGED 0x0800
	#define WIIPROTO_FLAG_MP_USED 0x1000
	#define WIIPROTO_FLAG_MP_ACTIVE 0x2000
	#define WIIPROTO_FLAG_EXITING 0x4000
	#define WIIPROTO_FLAG_DRM_LOCKED 0x8000
	#define WIIPROTO_FLAG_BUILTIN_MP 0x010000
	#define WIIPROTO_FLAG_NO_MP 0x020000
	#define WIIPROTO_FLAG_PRO_CALIB_DONE 0x040000

	#define WIIPROTO_FLAGS_LEDS (WIIPROTO_FLAG_LED1 \| WIIPROTO_FLAG_LED2 \| \
	WIIPROTO_FLAG_LED3 \| WIIPROTO_FLAG_LED4)
	#define WIIPROTO_FLAGS_IR (WIIPROTO_FLAG_IR_BASIC \| WIIPROTO_FLAG_IR_EXT \| \
	WIIPROTO_FLAG_IR_FULL)

	/* return flag for led \num */
	#define WIIPROTO_FLAG_LED(num) (WIIPROTO_FLAG_LED1 << (num - 1))

	enum wiiproto_keys {
	WIIPROTO_KEY_LEFT,
	WIIPROTO_KEY_RIGHT,
	WIIPROTO_KEY_UP,
	WIIPROTO_KEY_DOWN,
	WIIPROTO_KEY_PLUS,
	WIIPROTO_KEY_MINUS,
	WIIPROTO_KEY_ONE,
	WIIPROTO_KEY_TWO,
	WIIPROTO_KEY_A,
	WIIPROTO_KEY_B,
	WIIPROTO_KEY_HOME,
	WIIPROTO_KEY_COUNT
	};

	enum wiimote_devtype {
	WIIMOTE_DEV_PENDING,
	WIIMOTE_DEV_UNKNOWN,
	WIIMOTE_DEV_GENERIC,
	WIIMOTE_DEV_GEN10,
	WIIMOTE_DEV_GEN20,
	WIIMOTE_DEV_BALANCE_BOARD,
	WIIMOTE_DEV_PRO_CONTROLLER,
	WIIMOTE_DEV_NUM,
	};

	enum wiimote_exttype {
	WIIMOTE_EXT_NONE,
	WIIMOTE_EXT_UNKNOWN,
	WIIMOTE_EXT_NUNCHUK,
	WIIMOTE_EXT_CLASSIC_CONTROLLER,
	WIIMOTE_EXT_BALANCE_BOARD,
	WIIMOTE_EXT_PRO_CONTROLLER,
	WIIMOTE_EXT_NUM,
	};

	enum wiimote_mptype {
	WIIMOTE_MP_NONE,
	WIIMOTE_MP_UNKNOWN,
	WIIMOTE_MP_SINGLE,
	WIIMOTE_MP_PASSTHROUGH_NUNCHUK,
	WIIMOTE_MP_PASSTHROUGH_CLASSIC,
	};

	struct wiimote_buf {
	__u8 data[HID_MAX_BUFFER_SIZE];
	size_t size;
	};

	struct wiimote_queue {
	spinlock_t lock;
	struct work_struct worker;
	__u8 head;
	__u8 tail;
	struct wiimote_buf outq[WIIMOTE_BUFSIZE];
	};

	struct wiimote_state {
	spinlock_t lock;
	__u32 flags;
	__u8 accel_split[2];
	__u8 drm;
	__u8 devtype;
	__u8 exttype;
	__u8 mp;

	/* synchronous cmd requests */
	struct mutex sync;
	struct completion ready;
	int cmd;
	__u32 opt;

	/* results of synchronous requests */
	__u8 cmd_battery;
	__u8 cmd_err;
	__u8 *cmd_read_buf;
	__u8 cmd_read_size;

	/* calibration/cache data */
	__u16 calib_bboard[4][3];
	__s16 calib_pro_sticks[4];
	__u8 cache_rumble;
	};

	struct wiimote_data {
	struct hid_device *hdev;
	struct input_dev *input;
	struct work_struct rumble_worker;
	struct led_classdev *leds[4];
	struct input_dev *accel;
	struct input_dev *ir;
	struct power_supply battery;
	struct input_dev *mp;
	struct timer_list timer;
	struct wiimote_debug *debug;

	union {
	struct input_dev *input;
	} extension;

	struct wiimote_queue queue;
	struct wiimote_state state;
	struct work_struct init_worker;
	};

	/* wiimote modules */

	enum wiimod_module {
	WIIMOD_KEYS,
	WIIMOD_RUMBLE,
	WIIMOD_BATTERY,
	WIIMOD_LED1,
	WIIMOD_LED2,
	WIIMOD_LED3,
	WIIMOD_LED4,
	WIIMOD_ACCEL,
	WIIMOD_IR,
	WIIMOD_BUILTIN_MP,
	WIIMOD_NO_MP,
	WIIMOD_NUM,
	WIIMOD_NULL = WIIMOD_NUM,
	};

	#define WIIMOD_FLAG_INPUT 0x0001
	#define WIIMOD_FLAG_EXT8 0x0002
	#define WIIMOD_FLAG_EXT16 0x0004

	struct wiimod_ops {
	__u16 flags;
	unsigned long arg;
	int (probe) (const struct wiimod_ops ops,
	struct wiimote_data *wdata);
	void (remove) (const struct wiimod_ops ops,
	struct wiimote_data *wdata);

	void (in_keys) (struct wiimote_data wdata, const __u8 *keys);
	void (in_accel) (struct wiimote_data wdata, const __u8 *accel);
	void (in_ir) (struct wiimote_data wdata, const __u8 *ir, bool packed,
	unsigned int id);
	void (in_mp) (struct wiimote_data wdata, const __u8 *mp);
	void (in_ext) (struct wiimote_data wdata, const __u8 *ext);
	};

	extern const struct wiimod_ops *wiimod_table[WIIMOD_NUM];
	extern const struct wiimod_ops *wiimod_ext_table[WIIMOTE_EXT_NUM];
	extern const struct wiimod_ops wiimod_mp;

	/* wiimote requests */

	enum wiiproto_reqs {
	WIIPROTO_REQ_NULL = 0x0,
	WIIPROTO_REQ_RUMBLE = 0x10,
	WIIPROTO_REQ_LED = 0x11,
	WIIPROTO_REQ_DRM = 0x12,
	WIIPROTO_REQ_IR1 = 0x13,
	WIIPROTO_REQ_SREQ = 0x15,
	WIIPROTO_REQ_WMEM = 0x16,
	WIIPROTO_REQ_RMEM = 0x17,
	WIIPROTO_REQ_IR2 = 0x1a,
	WIIPROTO_REQ_STATUS = 0x20,
	WIIPROTO_REQ_DATA = 0x21,
	WIIPROTO_REQ_RETURN = 0x22,

	/* DRM_K: BB2 /
	WIIPROTO_REQ_DRM_K = 0x30,

	/* DRM_KA: BB2 AA3 */
	WIIPROTO_REQ_DRM_KA = 0x31,

	/* DRM_KE: BB2 EE8 */
	WIIPROTO_REQ_DRM_KE = 0x32,

	/* DRM_KAI: BB2 AA3 II12 /
	WIIPROTO_REQ_DRM_KAI = 0x33,

	/* DRM_KEE: BB2 EE19 */
	WIIPROTO_REQ_DRM_KEE = 0x34,

	/* DRM_KAE: BB2 AA3 EE16 /
	WIIPROTO_REQ_DRM_KAE = 0x35,

	/* DRM_KIE: BB2 II10 EE9 /
	WIIPROTO_REQ_DRM_KIE = 0x36,

	/* DRM_KAIE: BB2 AA3 II10 EE6 */
	WIIPROTO_REQ_DRM_KAIE = 0x37,

	/* DRM_E: EE21 /
	WIIPROTO_REQ_DRM_E = 0x3d,

	/* DRM_SKAI1: BB2 AA1 II18 /
	WIIPROTO_REQ_DRM_SKAI1 = 0x3e,

	/* DRM_SKAI2: BB2 AA1 II18 /
	WIIPROTO_REQ_DRM_SKAI2 = 0x3f,

	WIIPROTO_REQ_MAX
	};

	#define dev_to_wii(pdev) hid_get_drvdata(container_of(pdev, struct hid_device, \
	dev))

	void __wiimote_schedule(struct wiimote_data *wdata);

	extern void wiiproto_req_drm(struct wiimote_data *wdata, __u8 drm);
	extern void wiiproto_req_rumble(struct wiimote_data *wdata, __u8 rumble);
	extern void wiiproto_req_leds(struct wiimote_data *wdata, int leds);
	extern void wiiproto_req_status(struct wiimote_data *wdata);
	extern void wiiproto_req_accel(struct wiimote_data *wdata, __u8 accel);
	extern void wiiproto_req_ir1(struct wiimote_data *wdata, __u8 flags);
	extern void wiiproto_req_ir2(struct wiimote_data *wdata, __u8 flags);
	extern int wiimote_cmd_write(struct wiimote_data *wdata, __u32 offset,
	const __u8 *wmem, __u8 size);
	extern ssize_t wiimote_cmd_read(struct wiimote_data *wdata, __u32 offset,
	__u8 *rmem, __u8 size);

	#define wiiproto_req_rreg(wdata, os, sz) \
	wiiproto_req_rmem((wdata), false, (os), (sz))
	#define wiiproto_req_reeprom(wdata, os, sz) \
	wiiproto_req_rmem((wdata), true, (os), (sz))
	extern void wiiproto_req_rmem(struct wiimote_data *wdata, bool eeprom,
	__u32 offset, __u16 size);

	#ifdef CONFIG_DEBUG_FS

	extern int wiidebug_init(struct wiimote_data *wdata);
	extern void wiidebug_deinit(struct wiimote_data *wdata);

	#else

	static inline int wiidebug_init(void *u) { return 0; }
	static inline void wiidebug_deinit(void *u) { }

	#endif

	/* requires the state.lock spinlock to be held */
	static inline bool wiimote_cmd_pending(struct wiimote_data *wdata, int cmd,
	__u32 opt)
	{
	return wdata->state.cmd == cmd && wdata->state.opt == opt;
	}

	/* requires the state.lock spinlock to be held */
	static inline void wiimote_cmd_complete(struct wiimote_data *wdata)
	{
	wdata->state.cmd = WIIPROTO_REQ_NULL;
	complete(&wdata->state.ready);
	}

	/* requires the state.lock spinlock to be held */
	static inline void wiimote_cmd_abort(struct wiimote_data *wdata)
	{
	/* Abort synchronous request by waking up the sleeping caller. But
	* reset the state.cmd field to an invalid value so no further event
	* handlers will work with it. */
	wdata->state.cmd = WIIPROTO_REQ_MAX;
	complete(&wdata->state.ready);
	}

	static inline int wiimote_cmd_acquire(struct wiimote_data *wdata)
	{
	return mutex_lock_interruptible(&wdata->state.sync) ? -ERESTARTSYS : 0;
	}

	static inline void wiimote_cmd_acquire_noint(struct wiimote_data *wdata)
	{
	mutex_lock(&wdata->state.sync);
	}

	/* requires the state.lock spinlock to be held */
	static inline void wiimote_cmd_set(struct wiimote_data *wdata, int cmd,
	__u32 opt)
	{
	reinit_completion(&wdata->state.ready);
	wdata->state.cmd = cmd;
	wdata->state.opt = opt;
	}

	static inline void wiimote_cmd_release(struct wiimote_data *wdata)
	{
	mutex_unlock(&wdata->state.sync);
	}

	static inline int wiimote_cmd_wait(struct wiimote_data *wdata)
	{
	int ret;

	/* The completion acts as implicit memory barrier so we can safely
	* assume that state.cmd is set on success/failure and isn't accessed
	* by any other thread, anymore. */

	ret = wait_for_completion_interruptible_timeout(&wdata->state.ready, HZ);
	if (ret < 0)
	return -ERESTARTSYS;
	else if (ret == 0)
	return -EIO;
	else if (wdata->state.cmd != WIIPROTO_REQ_NULL)
	return -EIO;
	else
	return 0;
	}

	static inline int wiimote_cmd_wait_noint(struct wiimote_data *wdata)
	{
	unsigned long ret;

	/* no locking needed; see wiimote_cmd_wait() */
	ret = wait_for_completion_timeout(&wdata->state.ready, HZ);
	if (!ret)
	return -EIO;
	else if (wdata->state.cmd != WIIPROTO_REQ_NULL)
	return -EIO;
	else
	return 0;
	}

	#endif