include/linux/input.h

#ifndef _INPUT_H
#define _INPUT_H

/*
 * Copyright (c) 1999-2002 Vojtech Pavlik
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 as published by
 * the Free Software Foundation.
 */

#ifdef __KERNEL__
#include <linux/time.h>
#include <linux/list.h>
#else
#include <sys/time.h>
#include <sys/ioctl.h>
#include <sys/types.h>
#include <linux/types.h>
#endif

/*
 * The event structure itself
 */

struct input_event {
	struct timeval time;
	__u16 type;
	__u16 code;
	__s32 value;
};

/*
 * Protocol version.
 */

#define EV_VERSION		0x010000

/*
 * IOCTLs (0x00 - 0x7f)
 */

struct input_id {
	__u16 bustype;
	__u16 vendor;
	__u16 product;
	__u16 version;
};

struct input_absinfo {
	__s32 value;
	__s32 minimum;
	__s32 maximum;
	__s32 fuzz;
	__s32 flat;
	__s32 resolution;
};

#define EVIOCGVERSION		_IOR('E', 0x01, int)			/* get driver version */
#define EVIOCGID		_IOR('E', 0x02, struct input_id)	/* get device ID */
#define EVIOCGREP		_IOR('E', 0x03, int[2])			/* get repeat settings */
#define EVIOCSREP		_IOW('E', 0x03, int[2])			/* set repeat settings */
#define EVIOCGKEYCODE		_IOR('E', 0x04, int[2])			/* get keycode */
#define EVIOCSKEYCODE		_IOW('E', 0x04, int[2])			/* set keycode */

#define EVIOCGNAME(len)		_IOC(_IOC_READ, 'E', 0x06, len)		/* get device name */
#define EVIOCGPHYS(len)		_IOC(_IOC_READ, 'E', 0x07, len)		/* get physical location */
#define EVIOCGUNIQ(len)		_IOC(_IOC_READ, 'E', 0x08, len)		/* get unique identifier */

#define EVIOCGKEY(len)		_IOC(_IOC_READ, 'E', 0x18, len)		/* get global keystate */
#define EVIOCGLED(len)		_IOC(_IOC_READ, 'E', 0x19, len)		/* get all LEDs */
#define EVIOCGSND(len)		_IOC(_IOC_READ, 'E', 0x1a, len)		/* get all sounds status */
#define EVIOCGSW(len)		_IOC(_IOC_READ, 'E', 0x1b, len)		/* get all switch states */

#define EVIOCGBIT(ev,len)	_IOC(_IOC_READ, 'E', 0x20 + ev, len)	/* get event bits */
#define EVIOCGABS(abs)		_IOR('E', 0x40 + abs, struct input_absinfo)		/* get abs value/limits */
#define EVIOCSABS(abs)		_IOW('E', 0xc0 + abs, struct input_absinfo)		/* set abs value/limits */

#define EVIOCSFF		_IOC(_IOC_WRITE, 'E', 0x80, sizeof(struct ff_effect))	/* send a force effect to a force feedback device */
#define EVIOCRMFF		_IOW('E', 0x81, int)			/* Erase a force effect */
#define EVIOCGEFFECTS		_IOR('E', 0x84, int)			/* Report number of effects playable at the same time */

#define EVIOCGRAB		_IOW('E', 0x90, int)			/* Grab/Release device */

/*
 * Event types
 */

#define EV_SYN			0x00
#define EV_KEY			0x01
#define EV_REL			0x02
#define EV_ABS			0x03
#define EV_MSC			0x04
#define EV_SW			0x05
#define EV_LED			0x11
#define EV_SND			0x12
#define EV_REP			0x14
#define EV_FF			0x15
#define EV_PWR			0x16
#define EV_FF_STATUS		0x17
#define EV_MAX			0x1f
#define EV_CNT			(EV_MAX+1)

/*
 * Synchronization events.
 */

#define SYN_REPORT		0
#define SYN_CONFIG		1
#define SYN_MT_REPORT		2

/*
 * Keys and buttons
 *
 * Most of the keys/buttons are modeled after USB HUT 1.12
 * (see http://www.usb.org/developers/hidpage).
 * Abbreviations in the comments:
 * AC - Application Control
 * AL - Application Launch Button
 * SC - System Control
 */

#define KEY_RESERVED		0
#define KEY_ESC			1
#define KEY_1			2
#define KEY_2			3
#define KEY_3			4
#define KEY_4			5
#define KEY_5			6
#define KEY_6			7
#define KEY_7			8
#define KEY_8			9
#define KEY_9			10
#define KEY_0			11
#define KEY_MINUS		12
#define KEY_EQUAL		13
#define KEY_BACKSPACE		14
#define KEY_TAB			15
#define KEY_Q			16
#define KEY_W			17
#define KEY_E			18
#define KEY_R			19
#define KEY_T			20
#define KEY_Y			21
#define KEY_U			22
#define KEY_I			23
#define KEY_O			24
#define KEY_P			25
#define KEY_LEFTBRACE		26
#define KEY_RIGHTBRACE		27
#define KEY_ENTER		28
#define KEY_LEFTCTRL		29
#define KEY_A			30
#define KEY_S			31
#define KEY_D			32
#define KEY_F			33
#define KEY_G			34
#define KEY_H			35
#define KEY_J			36
#define KEY_K			37
#define KEY_L			38
#define KEY_SEMICOLON		39
#define KEY_APOSTROPHE		40
#define KEY_GRAVE		41
#define KEY_LEFTSHIFT		42
#define KEY_BACKSLASH		43
#define KEY_Z			44
#define KEY_X			45
#define KEY_C			46
#define KEY_V			47
#define KEY_B			48
#define KEY_N			49
#define KEY_M			50
#define KEY_COMMA		51
#define KEY_DOT			52
#define KEY_SLASH		53
#define KEY_RIGHTSHIFT		54
#define KEY_KPASTERISK		55
#define KEY_LEFTALT		56
#define KEY_SPACE		57
#define KEY_CAPSLOCK		58
#define KEY_F1			59
#define KEY_F2			60
#define KEY_F3			61
#define KEY_F4			62
#define KEY_F5			63
#define KEY_F6			64
#define KEY_F7			65
#define KEY_F8			66
#define KEY_F9			67
#define KEY_F10			68
#define KEY_NUMLOCK		69
#define KEY_SCROLLLOCK		70
#define KEY_KP7			71
#define KEY_KP8			72
#define KEY_KP9			73
#define KEY_KPMINUS		74
#define KEY_KP4			75
#define KEY_KP5			76
#define KEY_KP6			77
#define KEY_KPPLUS		78
#define KEY_KP1			79
#define KEY_KP2			80
#define KEY_KP3			81
#define KEY_KP0			82
#define KEY_KPDOT		83

#define KEY_ZENKAKUHANKAKU	85
#define KEY_102ND		86
#define KEY_F11			87
#define KEY_F12			88
#define KEY_RO			89
#define KEY_KATAKANA		90
#define KEY_HIRAGANA		91
#define KEY_HENKAN		92
#define KEY_KATAKANAHIRAGANA	93
#define KEY_MUHENKAN		94
#define KEY_KPJPCOMMA		95
#define KEY_KPENTER		96
#define KEY_RIGHTCTRL		97
#define KEY_KPSLASH		98
#define KEY_SYSRQ		99
#define KEY_RIGHTALT		100
#define KEY_LINEFEED		101
#define KEY_HOME		102
#define KEY_UP			103
#define KEY_PAGEUP		104
#define KEY_LEFT		105
#define KEY_RIGHT		106
#define KEY_END			107
#define KEY_DOWN		108
#define KEY_PAGEDOWN		109
#define KEY_INSERT		110
#define KEY_DELETE		111
#define KEY_MACRO		112
#define KEY_MUTE		113
#define KEY_VOLUMEDOWN		114
#define KEY_VOLUMEUP		115
#define KEY_POWER		116	/* SC System Power Down */
#define KEY_KPEQUAL		117
#define KEY_KPPLUSMINUS		118
#define KEY_PAUSE		119
#define KEY_SCALE		120	/* AL Compiz Scale (Expose) */

#define KEY_KPCOMMA		121
#define KEY_HANGEUL		122
#define KEY_HANGUEL		KEY_HANGEUL
#define KEY_HANJA		123
#define KEY_YEN			124
#define KEY_LEFTMETA		125
#define KEY_RIGHTMETA		126
#define KEY_COMPOSE		127

#define KEY_STOP		128	/* AC Stop */
#define KEY_AGAIN		129
#define KEY_PROPS		130	/* AC Properties */
#define KEY_UNDO		131	/* AC Undo */
#define KEY_FRONT		132
#define KEY_COPY		133	/* AC Copy */
#define KEY_OPEN		134	/* AC Open */
#define KEY_PASTE		135	/* AC Paste */
#define KEY_FIND		136	/* AC Search */
#define KEY_CUT			137	/* AC Cut */
#define KEY_HELP		138	/* AL Integrated Help Center */
#define KEY_MENU		139	/* Menu (show menu) */
#define KEY_CALC		140	/* AL Calculator */
#define KEY_SETUP		141
#define KEY_SLEEP		142	/* SC System Sleep */
#define KEY_WAKEUP		143	/* System Wake Up */
#define KEY_FILE		144	/* AL Local Machine Browser */
#define KEY_SENDFILE		145
#define KEY_DELETEFILE		146
#define KEY_XFER		147
#define KEY_PROG1		148
#define KEY_PROG2		149
#define KEY_WWW			150	/* AL Internet Browser */
#define KEY_MSDOS		151
#define KEY_COFFEE		152	/* AL Terminal Lock/Screensaver */
#define KEY_SCREENLOCK		KEY_COFFEE
#define KEY_DIRECTION		153
#define KEY_CYCLEWINDOWS	154
#define KEY_MAIL		155
#define KEY_BOOKMARKS		156	/* AC Bookmarks */
#define KEY_COMPUTER		157
#define KEY_BACK		158	/* AC Back */
#define KEY_FORWARD		159	/* AC Forward */
#define KEY_CLOSECD		160
#define KEY_EJECTCD		161
#define KEY_EJECTCLOSECD	162
#define KEY_NEXTSONG		163
#define KEY_PLAYPAUSE		164
#define KEY_PREVIOUSSONG	165
#define KEY_STOPCD		166
#define KEY_RECORD		167
#define KEY_REWIND		168
#define KEY_PHONE		169	/* Media Select Telephone */
#define KEY_ISO			170
#define KEY_CONFIG		171	/* AL Consumer Control Configuration */
#define KEY_HOMEPAGE		172	/* AC Home */
#define KEY_REFRESH		173	/* AC Refresh */
#define KEY_EXIT		174	/* AC Exit */
#define KEY_MOVE		175
#define KEY_EDIT		176
#define KEY_SCROLLUP		177
#define KEY_SCROLLDOWN		178
#define KEY_KPLEFTPAREN		179
#define KEY_KPRIGHTPAREN	180
#define KEY_NEW			181	/* AC New */
#define KEY_REDO		182	/* AC Redo/Repeat */

#define KEY_F13			183
#define KEY_F14			184
#define KEY_F15			185
#define KEY_F16			186
#define KEY_F17			187
#define KEY_F18			188
#define KEY_F19			189
#define KEY_F20			190
#define KEY_F21			191
#define KEY_F22			192
#define KEY_F23			193
#define KEY_F24			194

#define KEY_PLAYCD		200
#define KEY_PAUSECD		201
#define KEY_PROG3		202
#define KEY_PROG4		203
#define KEY_DASHBOARD		204	/* AL Dashboard */
#define KEY_SUSPEND		205
#define KEY_CLOSE		206	/* AC Close */
#define KEY_PLAY		207
#define KEY_FASTFORWARD		208
#define KEY_BASSBOOST		209
#define KEY_PRINT		210	/* AC Print */
#define KEY_HP			211
#define KEY_CAMERA		212
#define KEY_SOUND		213
#define KEY_QUESTION		214
#define KEY_EMAIL		215
#define KEY_CHAT		216
#define KEY_SEARCH		217
#define KEY_CONNECT		218
#define KEY_FINANCE		219	/* AL Checkbook/Finance */
#define KEY_SPORT		220
#define KEY_SHOP		221
#define KEY_ALTERASE		222
#define KEY_CANCEL		223	/* AC Cancel */
#define KEY_BRIGHTNESSDOWN	224
#define KEY_BRIGHTNESSUP	225
#define KEY_MEDIA		226

#define KEY_SWITCHVIDEOMODE	227	/* Cycle between available video
					   outputs (Monitor/LCD/TV-out/etc) */
#define KEY_KBDILLUMTOGGLE	228
#define KEY_KBDILLUMDOWN	229
#define KEY_KBDILLUMUP		230

#define KEY_SEND		231	/* AC Send */
#define KEY_REPLY		232	/* AC Reply */
#define KEY_FORWARDMAIL		233	/* AC Forward Msg */
#define KEY_SAVE		234	/* AC Save */
#define KEY_DOCUMENTS		235

#define KEY_BATTERY		236

#define KEY_BLUETOOTH		237
#define KEY_WLAN		238
#define KEY_UWB			239

#define KEY_UNKNOWN		240

#define KEY_VIDEO_NEXT		241	/* drive next video source */
#define KEY_VIDEO_PREV		242	/* drive previous video source */
#define KEY_BRIGHTNESS_CYCLE	243	/* brightness up, after max is min */
#define KEY_BRIGHTNESS_ZERO	244	/* brightness off, use ambient */
#define KEY_DISPLAY_OFF		245	/* display device to off state */

#define KEY_WIMAX		246

/* Range 248 - 255 is reserved for special needs of AT keyboard driver */

#define BTN_MISC		0x100
#define BTN_0			0x100
#define BTN_1			0x101
#define BTN_2			0x102
#define BTN_3			0x103
#define BTN_4			0x104
#define BTN_5			0x105
#define BTN_6			0x106
#define BTN_7			0x107
#define BTN_8			0x108
#define BTN_9			0x109

#define BTN_MOUSE		0x110
#define BTN_LEFT		0x110
#define BTN_RIGHT		0x111
#define BTN_MIDDLE		0x112
#define BTN_SIDE		0x113
#define BTN_EXTRA		0x114
#define BTN_FORWARD		0x115
#define BTN_BACK		0x116
#define BTN_TASK		0x117

#define BTN_JOYSTICK		0x120
#define BTN_TRIGGER		0x120
#define BTN_THUMB		0x121
#define BTN_THUMB2		0x122
#define BTN_TOP			0x123
#define BTN_TOP2		0x124
#define BTN_PINKIE		0x125
#define BTN_BASE		0x126
#define BTN_BASE2		0x127
#define BTN_BASE3		0x128
#define BTN_BASE4		0x129
#define BTN_BASE5		0x12a
#define BTN_BASE6		0x12b
#define BTN_DEAD		0x12f

#define BTN_GAMEPAD		0x130
#define BTN_A			0x130
#define BTN_B			0x131
#define BTN_C			0x132
#define BTN_X			0x133
#define BTN_Y			0x134
#define BTN_Z			0x135
#define BTN_TL			0x136
#define BTN_TR			0x137
#define BTN_TL2			0x138
#define BTN_TR2			0x139
#define BTN_SELECT		0x13a
#define BTN_START		0x13b
#define BTN_MODE		0x13c
#define BTN_THUMBL		0x13d
#define BTN_THUMBR		0x13e

#define BTN_DIGI		0x140
#define BTN_TOOL_PEN		0x140
#define BTN_TOOL_RUBBER		0x141
#define BTN_TOOL_BRUSH		0x142
#define BTN_TOOL_PENCIL		0x143
#define BTN_TOOL_AIRBRUSH	0x144
#define BTN_TOOL_FINGER		0x145
#define BTN_TOOL_MOUSE		0x146
#define BTN_TOOL_LENS		0x147
#define BTN_TOUCH		0x14a
#define BTN_STYLUS		0x14b
#define BTN_STYLUS2		0x14c
#define BTN_TOOL_DOUBLETAP	0x14d
#define BTN_TOOL_TRIPLETAP	0x14e
#define BTN_TOOL_QUADTAP	0x14f	/* Four fingers on trackpad */

#define BTN_WHEEL		0x150
#define BTN_GEAR_DOWN		0x150
#define BTN_GEAR_UP		0x151

#define KEY_OK			0x160
#define KEY_SELECT		0x161
#define KEY_GOTO		0x162
#define KEY_CLEAR		0x163
#define KEY_POWER2		0x164
#define KEY_OPTION		0x165
#define KEY_INFO		0x166	/* AL OEM Features/Tips/Tutorial */
#define KEY_TIME		0x167
#define KEY_VENDOR		0x168
#define KEY_ARCHIVE		0x169
#define KEY_PROGRAM		0x16a	/* Media Select Program Guide */
#define KEY_CHANNEL		0x16b
#define KEY_FAVORITES		0x16c
#define KEY_EPG			0x16d
#define KEY_PVR			0x16e	/* Media Select Home */
#define KEY_MHP			0x16f
#define KEY_LANGUAGE		0x170
#define KEY_TITLE		0x171
#define KEY_SUBTITLE		0x172
#define KEY_ANGLE		0x173
#define KEY_ZOOM		0x174
#define KEY_MODE		0x175
#define KEY_KEYBOARD		0x176
#define KEY_SCREEN		0x177
#define KEY_PC			0x178	/* Media Select Computer */
#define KEY_TV			0x179	/* Media Select TV */
#define KEY_TV2			0x17a	/* Media Select Cable */
#define KEY_VCR			0x17b	/* Media Select VCR */
#define KEY_VCR2		0x17c	/* VCR Plus */
#define KEY_SAT			0x17d	/* Media Select Satellite */
#define KEY_SAT2		0x17e
#define KEY_CD			0x17f	/* Media Select CD */
#define KEY_TAPE		0x180	/* Media Select Tape */
#define KEY_RADIO		0x181
#define KEY_TUNER		0x182	/* Media Select Tuner */
#define KEY_PLAYER		0x183
#define KEY_TEXT		0x184
#define KEY_DVD			0x185	/* Media Select DVD */
#define KEY_AUX			0x186
#define KEY_MP3			0x187
#define KEY_AUDIO		0x188
#define KEY_VIDEO		0x189
#define KEY_DIRECTORY		0x18a
#define KEY_LIST		0x18b
#define KEY_MEMO		0x18c	/* Media Select Messages */
#define KEY_CALENDAR		0x18d
#define KEY_RED			0x18e
#define KEY_GREEN		0x18f
#define KEY_YELLOW		0x190
#define KEY_BLUE		0x191
#define KEY_CHANNELUP		0x192	/* Channel Increment */
#define KEY_CHANNELDOWN		0x193	/* Channel Decrement */
#define KEY_FIRST		0x194
#define KEY_LAST		0x195	/* Recall Last */
#define KEY_AB			0x196
#define KEY_NEXT		0x197
#define KEY_RESTART		0x198
#define KEY_SLOW		0x199
#define KEY_SHUFFLE		0x19a
#define KEY_BREAK		0x19b
#define KEY_PREVIOUS		0x19c
#define KEY_DIGITS		0x19d
#define KEY_TEEN		0x19e
#define KEY_TWEN		0x19f
#define KEY_VIDEOPHONE		0x1a0	/* Media Select Video Phone */
#define KEY_GAMES		0x1a1	/* Media Select Games */
#define KEY_ZOOMIN		0x1a2	/* AC Zoom In */
#define KEY_ZOOMOUT		0x1a3	/* AC Zoom Out */
#define KEY_ZOOMRESET		0x1a4	/* AC Zoom */
#define KEY_WORDPROCESSOR	0x1a5	/* AL Word Processor */
#define KEY_EDITOR		0x1a6	/* AL Text Editor */
#define KEY_SPREADSHEET		0x1a7	/* AL Spreadsheet */
#define KEY_GRAPHICSEDITOR	0x1a8	/* AL Graphics Editor */
#define KEY_PRESENTATION	0x1a9	/* AL Presentation App */
#define KEY_DATABASE		0x1aa	/* AL Database App */
#define KEY_NEWS		0x1ab	/* AL Newsreader */
#define KEY_VOICEMAIL		0x1ac	/* AL Voicemail */
#define KEY_ADDRESSBOOK		0x1ad	/* AL Contacts/Address Book */
#define KEY_MESSENGER		0x1ae	/* AL Instant Messaging */
#define KEY_DISPLAYTOGGLE	0x1af	/* Turn display (LCD) on and off */
#define KEY_SPELLCHECK		0x1b0   /* AL Spell Check */
#define KEY_LOGOFF		0x1b1   /* AL Logoff */

#define KEY_DOLLAR		0x1b2
#define KEY_EURO		0x1b3

#define KEY_FRAMEBACK		0x1b4	/* Consumer - transport controls */
#define KEY_FRAMEFORWARD	0x1b5
#define KEY_CONTEXT_MENU	0x1b6	/* GenDesc - system context menu */
#define KEY_MEDIA_REPEAT	0x1b7	/* Consumer - transport control */

#define KEY_DEL_EOL		0x1c0
#define KEY_DEL_EOS		0x1c1
#define KEY_INS_LINE		0x1c2
#define KEY_DEL_LINE		0x1c3

#define KEY_FN			0x1d0
#define KEY_FN_ESC		0x1d1
#define KEY_FN_F1		0x1d2
#define KEY_FN_F2		0x1d3
#define KEY_FN_F3		0x1d4
#define KEY_FN_F4		0x1d5
#define KEY_FN_F5		0x1d6
#define KEY_FN_F6		0x1d7
#define KEY_FN_F7		0x1d8
#define KEY_FN_F8		0x1d9
#define KEY_FN_F9		0x1da
#define KEY_FN_F10		0x1db
#define KEY_FN_F11		0x1dc
#define KEY_FN_F12		0x1dd
#define KEY_FN_1		0x1de
#define KEY_FN_2		0x1df
#define KEY_FN_D		0x1e0
#define KEY_FN_E		0x1e1
#define KEY_FN_F		0x1e2
#define KEY_FN_S		0x1e3
#define KEY_FN_B		0x1e4

#define KEY_BRL_DOT1		0x1f1
#define KEY_BRL_DOT2		0x1f2
#define KEY_BRL_DOT3		0x1f3
#define KEY_BRL_DOT4		0x1f4
#define KEY_BRL_DOT5		0x1f5
#define KEY_BRL_DOT6		0x1f6
#define KEY_BRL_DOT7		0x1f7
#define KEY_BRL_DOT8		0x1f8
#define KEY_BRL_DOT9		0x1f9
#define KEY_BRL_DOT10		0x1fa

#define KEY_NUMERIC_0		0x200	/* used by phones, remote controls, */
#define KEY_NUMERIC_1		0x201	/* and other keypads */
#define KEY_NUMERIC_2		0x202
#define KEY_NUMERIC_3		0x203
#define KEY_NUMERIC_4		0x204
#define KEY_NUMERIC_5		0x205
#define KEY_NUMERIC_6		0x206
#define KEY_NUMERIC_7		0x207
#define KEY_NUMERIC_8		0x208
#define KEY_NUMERIC_9		0x209
#define KEY_NUMERIC_STAR	0x20a
#define KEY_NUMERIC_POUND	0x20b

/* We avoid low common keys in module aliases so they don't get huge. */
#define KEY_MIN_INTERESTING	KEY_MUTE
#define KEY_MAX			0x2ff
#define KEY_CNT			(KEY_MAX+1)

/*
 * Relative axes
 */

#define REL_X			0x00
#define REL_Y			0x01
#define REL_Z			0x02
#define REL_RX			0x03
#define REL_RY			0x04
#define REL_RZ			0x05
#define REL_HWHEEL		0x06
#define REL_DIAL		0x07
#define REL_WHEEL		0x08
#define REL_MISC		0x09
#define REL_MAX			0x0f
#define REL_CNT			(REL_MAX+1)

/*
 * Absolute axes
 */

#define ABS_X			0x00
#define ABS_Y			0x01
#define ABS_Z			0x02
#define ABS_RX			0x03
#define ABS_RY			0x04
#define ABS_RZ			0x05
#define ABS_THROTTLE		0x06
#define ABS_RUDDER		0x07
#define ABS_WHEEL		0x08
#define ABS_GAS			0x09
#define ABS_BRAKE		0x0a
#define ABS_HAT0X		0x10
#define ABS_HAT0Y		0x11
#define ABS_HAT1X		0x12
#define ABS_HAT1Y		0x13
#define ABS_HAT2X		0x14
#define ABS_HAT2Y		0x15
#define ABS_HAT3X		0x16
#define ABS_HAT3Y		0x17
#define ABS_PRESSURE		0x18
#define ABS_DISTANCE		0x19
#define ABS_TILT_X		0x1a
#define ABS_TILT_Y		0x1b
#define ABS_TOOL_WIDTH		0x1c
#define ABS_VOLUME		0x20
#define ABS_MISC		0x28

#define ABS_MT_TOUCH_MAJOR	0x30	/* Major axis of touching ellipse */
#define ABS_MT_TOUCH_MINOR	0x31	/* Minor axis (omit if circular) */
#define ABS_MT_WIDTH_MAJOR	0x32	/* Major axis of approaching ellipse */
#define ABS_MT_WIDTH_MINOR	0x33	/* Minor axis (omit if circular) */
#define ABS_MT_ORIENTATION	0x34	/* Ellipse orientation */
#define ABS_MT_POSITION_X	0x35	/* Center X ellipse position */
#define ABS_MT_POSITION_Y	0x36	/* Center Y ellipse position */
#define ABS_MT_TOOL_TYPE	0x37	/* Type of touching device */
#define ABS_MT_BLOB_ID		0x38	/* Group a set of packets as a blob */
#define ABS_MT_TRACKING_ID	0x39	/* Unique ID of initiated contact */

#define ABS_MAX			0x3f
#define ABS_CNT			(ABS_MAX+1)

/*
 * Switch events
 */

#define SW_LID			0x00  /* set = lid shut */
#define SW_TABLET_MODE		0x01  /* set = tablet mode */
#define SW_HEADPHONE_INSERT	0x02  /* set = inserted */
#define SW_RFKILL_ALL		0x03  /* rfkill master switch, type "any"
					 set = radio enabled */
#define SW_RADIO		SW_RFKILL_ALL	/* deprecated */
#define SW_MICROPHONE_INSERT	0x04  /* set = inserted */
#define SW_DOCK			0x05  /* set = plugged into dock */
#define SW_LINEOUT_INSERT	0x06  /* set = inserted */
#define SW_JACK_PHYSICAL_INSERT 0x07  /* set = mechanical switch set */
#define SW_VIDEOOUT_INSERT	0x08  /* set = inserted */
#define SW_MAX			0x0f
#define SW_CNT			(SW_MAX+1)

/*
 * Misc events
 */

#define MSC_SERIAL		0x00
#define MSC_PULSELED		0x01
#define MSC_GESTURE		0x02
#define MSC_RAW			0x03
#define MSC_SCAN		0x04
#define MSC_MAX			0x07
#define MSC_CNT			(MSC_MAX+1)

/*
 * LEDs
 */

#define LED_NUML		0x00
#define LED_CAPSL		0x01
#define LED_SCROLLL		0x02
#define LED_COMPOSE		0x03
#define LED_KANA		0x04
#define LED_SLEEP		0x05
#define LED_SUSPEND		0x06
#define LED_MUTE		0x07
#define LED_MISC		0x08
#define LED_MAIL		0x09
#define LED_CHARGING		0x0a
#define LED_MAX			0x0f
#define LED_CNT			(LED_MAX+1)

/*
 * Autorepeat values
 */

#define REP_DELAY		0x00
#define REP_PERIOD		0x01
#define REP_MAX			0x01

/*
 * Sounds
 */

#define SND_CLICK		0x00
#define SND_BELL		0x01
#define SND_TONE		0x02
#define SND_MAX			0x07
#define SND_CNT			(SND_MAX+1)

/*
 * IDs.
 */

#define ID_BUS			0
#define ID_VENDOR		1
#define ID_PRODUCT		2
#define ID_VERSION		3

#define BUS_PCI			0x01
#define BUS_ISAPNP		0x02
#define BUS_USB			0x03
#define BUS_HIL			0x04
#define BUS_BLUETOOTH		0x05
#define BUS_VIRTUAL		0x06

#define BUS_ISA			0x10
#define BUS_I8042		0x11
#define BUS_XTKBD		0x12
#define BUS_RS232		0x13
#define BUS_GAMEPORT		0x14
#define BUS_PARPORT		0x15
#define BUS_AMIGA		0x16
#define BUS_ADB			0x17
#define BUS_I2C			0x18
#define BUS_HOST		0x19
#define BUS_GSC			0x1A
#define BUS_ATARI		0x1B

/*
 * MT_TOOL types
 */
#define MT_TOOL_FINGER		0
#define MT_TOOL_PEN		1

/*
 * Values describing the status of a force-feedback effect
 */
#define FF_STATUS_STOPPED	0x00
#define FF_STATUS_PLAYING	0x01
#define FF_STATUS_MAX		0x01

/*
 * Structures used in ioctls to upload effects to a device
 * They are pieces of a bigger structure (called ff_effect)
 */

/*
 * All duration values are expressed in ms. Values above 32767 ms (0x7fff)
 * should not be used and have unspecified results.
 */

/**
 * struct ff_replay - defines scheduling of the force-feedback effect
 * @length: duration of the effect
 * @delay: delay before effect should start playing
 */
struct ff_replay {
	__u16 length;
	__u16 delay;
};

/**
 * struct ff_trigger - defines what triggers the force-feedback effect
 * @button: number of the button triggering the effect
 * @interval: controls how soon the effect can be re-triggered
 */
struct ff_trigger {
	__u16 button;
	__u16 interval;
};

/**
 * struct ff_envelope - generic force-feedback effect envelope
 * @attack_length: duration of the attack (ms)
 * @attack_level: level at the beginning of the attack
 * @fade_length: duration of fade (ms)
 * @fade_level: level at the end of fade
 *
 * The @attack_level and @fade_level are absolute values; when applying
 * envelope force-feedback core will convert to positive/negative
 * value based on polarity of the default level of the effect.
 * Valid range for the attack and fade levels is 0x0000 - 0x7fff
 */
struct ff_envelope {
	__u16 attack_length;
	__u16 attack_level;
	__u16 fade_length;
	__u16 fade_level;
};

/**
 * struct ff_constant_effect - defines parameters of a constant force-feedback effect
 * @level: strength of the effect; may be negative
 * @envelope: envelope data
 */
struct ff_constant_effect {
	__s16 level;
	struct ff_envelope envelope;
};

/**
 * struct ff_ramp_effect - defines parameters of a ramp force-feedback effect
 * @start_level: beginning strength of the effect; may be negative
 * @end_level: final strength of the effect; may be negative
 * @envelope: envelope data
 */
struct ff_ramp_effect {
	__s16 start_level;
	__s16 end_level;
	struct ff_envelope envelope;
};

/**
 * struct ff_condition_effect - defines a spring or friction force-feedback effect
 * @right_saturation: maximum level when joystick moved all way to the right
 * @left_saturation: same for the left side
 * @right_coeff: controls how fast the force grows when the joystick moves
 *	to the right
 * @left_coeff: same for the left side
 * @deadband: size of the dead zone, where no force is produced
 * @center: position of the dead zone
 */
struct ff_condition_effect {
	__u16 right_saturation;
	__u16 left_saturation;

	__s16 right_coeff;
	__s16 left_coeff;

	__u16 deadband;
	__s16 center;
};

/**
 * struct ff_periodic_effect - defines parameters of a periodic force-feedback effect
 * @waveform: kind of the effect (wave)
 * @period: period of the wave (ms)
 * @magnitude: peak value
 * @offset: mean value of the wave (roughly)
 * @phase: 'horizontal' shift
 * @envelope: envelope data
 * @custom_len: number of samples (FF_CUSTOM only)
 * @custom_data: buffer of samples (FF_CUSTOM only)
 *
 * Known waveforms - FF_SQUARE, FF_TRIANGLE, FF_SINE, FF_SAW_UP,
 * FF_SAW_DOWN, FF_CUSTOM. The exact syntax FF_CUSTOM is undefined
 * for the time being as no driver supports it yet.
 *
 * Note: the data pointed by custom_data is copied by the driver.
 * You can therefore dispose of the memory after the upload/update.
 */
struct ff_periodic_effect {
	__u16 waveform;
	__u16 period;
	__s16 magnitude;
	__s16 offset;
	__u16 phase;

	struct ff_envelope envelope;

	__u32 custom_len;
	__s16 *custom_data;
};

/**
 * struct ff_rumble_effect - defines parameters of a periodic force-feedback effect
 * @strong_magnitude: magnitude of the heavy motor
 * @weak_magnitude: magnitude of the light one
 *
 * Some rumble pads have two motors of different weight. Strong_magnitude
 * represents the magnitude of the vibration generated by the heavy one.
 */
struct ff_rumble_effect {
	__u16 strong_magnitude;
	__u16 weak_magnitude;
};

/**
 * struct ff_effect - defines force feedback effect
 * @type: type of the effect (FF_CONSTANT, FF_PERIODIC, FF_RAMP, FF_SPRING,
 *	FF_FRICTION, FF_DAMPER, FF_RUMBLE, FF_INERTIA, or FF_CUSTOM)
 * @id: an unique id assigned to an effect
 * @direction: direction of the effect
 * @trigger: trigger conditions (struct ff_trigger)
 * @replay: scheduling of the effect (struct ff_replay)
 * @u: effect-specific structure (one of ff_constant_effect, ff_ramp_effect,
 *	ff_periodic_effect, ff_condition_effect, ff_rumble_effect) further
 *	defining effect parameters
 *
 * This structure is sent through ioctl from the application to the driver.
 * To create a new effect application should set its @id to -1; the kernel
 * will return assigned @id which can later be used to update or delete
 * this effect.
 *
 * Direction of the effect is encoded as follows:
 *	0 deg -> 0x0000 (down)
 *	90 deg -> 0x4000 (left)
 *	180 deg -> 0x8000 (up)
 *	270 deg -> 0xC000 (right)
 */
struct ff_effect {
	__u16 type;
	__s16 id;
	__u16 direction;
	struct ff_trigger trigger;
	struct ff_replay replay;

	union {
		struct ff_constant_effect constant;
		struct ff_ramp_effect ramp;
		struct ff_periodic_effect periodic;
		struct ff_condition_effect condition[2]; /* One for each axis */
		struct ff_rumble_effect rumble;
	} u;
};

/*
 * Force feedback effect types
 */

#define FF_RUMBLE	0x50
#define FF_PERIODIC	0x51
#define FF_CONSTANT	0x52
#define FF_SPRING	0x53
#define FF_FRICTION	0x54
#define FF_DAMPER	0x55
#define FF_INERTIA	0x56
#define FF_RAMP		0x57

#define FF_EFFECT_MIN	FF_RUMBLE
#define FF_EFFECT_MAX	FF_RAMP

/*
 * Force feedback periodic effect types
 */

#define FF_SQUARE	0x58
#define FF_TRIANGLE	0x59
#define FF_SINE		0x5a
#define FF_SAW_UP	0x5b
#define FF_SAW_DOWN	0x5c
#define FF_CUSTOM	0x5d

#define FF_WAVEFORM_MIN	FF_SQUARE
#define FF_WAVEFORM_MAX	FF_CUSTOM

/*
 * Set ff device properties
 */

#define FF_GAIN		0x60
#define FF_AUTOCENTER	0x61

#define FF_MAX		0x7f
#define FF_CNT		(FF_MAX+1)

#ifdef __KERNEL__

/*
 * In-kernel definitions.
 */

#include <linux/device.h>
#include <linux/fs.h>
#include <linux/timer.h>
#include <linux/mod_devicetable.h>

/**
 * struct input_dev - represents an input device
 * @name: name of the device
 * @phys: physical path to the device in the system hierarchy
 * @uniq: unique identification code for the device (if device has it)
 * @id: id of the device (struct input_id)
 * @evbit: bitmap of types of events supported by the device (EV_KEY,
 *	EV_REL, etc.)
 * @keybit: bitmap of keys/buttons this device has
 * @relbit: bitmap of relative axes for the device
 * @absbit: bitmap of absolute axes for the device
 * @mscbit: bitmap of miscellaneous events supported by the device
 * @ledbit: bitmap of leds present on the device
 * @sndbit: bitmap of sound effects supported by the device
 * @ffbit: bitmap of force feedback effects supported by the device
 * @swbit: bitmap of switches present on the device
 * @keycodemax: size of keycode table
 * @keycodesize: size of elements in keycode table
 * @keycode: map of scancodes to keycodes for this device
 * @setkeycode: optional method to alter current keymap, used to implement
 *	sparse keymaps. If not supplied default mechanism will be used
 * @getkeycode: optional method to retrieve current keymap. If not supplied
 *	default mechanism will be used
 * @ff: force feedback structure associated with the device if device
 *	supports force feedback effects
 * @repeat_key: stores key code of the last key pressed; used to implement
 *	software autorepeat
 * @timer: timer for software autorepeat
 * @sync: set to 1 when there were no new events since last EV_SYNC
 * @abs: current values for reports from absolute axes
 * @rep: current values for autorepeat parameters (delay, rate)
 * @key: reflects current state of device's keys/buttons
 * @led: reflects current state of device's LEDs
 * @snd: reflects current state of sound effects
 * @sw: reflects current state of device's switches
 * @absmax: maximum values for events coming from absolute axes
 * @absmin: minimum values for events coming from absolute axes
 * @absfuzz: describes noisiness for axes
 * @absflat: size of the center flat position (used by joydev)
 * @open: this method is called when the very first user calls
 *	input_open_device(). The driver must prepare the device
 *	to start generating events (start polling thread,
 *	request an IRQ, submit URB, etc.)
 * @close: this method is called when the very last user calls
 *	input_close_device().
 * @flush: purges the device. Most commonly used to get rid of force
 *	feedback effects loaded into the device when disconnecting
 *	from it
 * @event: event handler for events sent _to_ the device, like EV_LED
 *	or EV_SND. The device is expected to carry out the requested
 *	action (turn on a LED, play sound, etc.) The call is protected
 *	by @event_lock and must not sleep
 * @grab: input handle that currently has the device grabbed (via
 *	EVIOCGRAB ioctl). When a handle grabs a device it becomes sole
 *	recipient for all input events coming from the device
 * @event_lock: this spinlock is is taken when input core receives
 *	and processes a new event for the device (in input_event()).
 *	Code that accesses and/or modifies parameters of a device
 *	(such as keymap or absmin, absmax, absfuzz, etc.) after device
 *	has been registered with input core must take this lock.
 * @mutex: serializes calls to open(), close() and flush() methods
 * @users: stores number of users (input handlers) that opened this
 *	device. It is used by input_open_device() and input_close_device()
 *	to make sure that dev->open() is only called when the first
 *	user opens device and dev->close() is called when the very
 *	last user closes the device
 * @going_away: marks devices that are in a middle of unregistering and
 *	causes input_open_device*() fail with -ENODEV.
 * @dev: driver model's view of this device
 * @h_list: list of input handles associated with the device. When
 *	accessing the list dev->mutex must be held
 * @node: used to place the device onto input_dev_list
 */
struct input_dev {
	const char *name;
	const char *phys;
	const char *uniq;
	struct input_id id;

	unsigned long evbit[BITS_TO_LONGS(EV_CNT)];
	unsigned long keybit[BITS_TO_LONGS(KEY_CNT)];
	unsigned long relbit[BITS_TO_LONGS(REL_CNT)];
	unsigned long absbit[BITS_TO_LONGS(ABS_CNT)];
	unsigned long mscbit[BITS_TO_LONGS(MSC_CNT)];
	unsigned long ledbit[BITS_TO_LONGS(LED_CNT)];
	unsigned long sndbit[BITS_TO_LONGS(SND_CNT)];
	unsigned long ffbit[BITS_TO_LONGS(FF_CNT)];
	unsigned long swbit[BITS_TO_LONGS(SW_CNT)];

	unsigned int keycodemax;
	unsigned int keycodesize;
	void *keycode;
	int (*setkeycode)(struct input_dev *dev, int scancode, int keycode);
	int (*getkeycode)(struct input_dev *dev, int scancode, int *keycode);

	struct ff_device *ff;

	unsigned int repeat_key;
	struct timer_list timer;

	int sync;

	int abs[ABS_MAX + 1];
	int rep[REP_MAX + 1];

	unsigned long key[BITS_TO_LONGS(KEY_CNT)];
	unsigned long led[BITS_TO_LONGS(LED_CNT)];
	unsigned long snd[BITS_TO_LONGS(SND_CNT)];
	unsigned long sw[BITS_TO_LONGS(SW_CNT)];

	int absmax[ABS_MAX + 1];
	int absmin[ABS_MAX + 1];
	int absfuzz[ABS_MAX + 1];
	int absflat[ABS_MAX + 1];
	int absres[ABS_MAX + 1];

	int (*open)(struct input_dev *dev);
	void (*close)(struct input_dev *dev);
	int (*flush)(struct input_dev *dev, struct file *file);
	int (*event)(struct input_dev *dev, unsigned int type, unsigned int code, int value);

	struct input_handle *grab;

	spinlock_t event_lock;
	struct mutex mutex;

	unsigned int users;
	bool going_away;

	struct device dev;

	struct list_head	h_list;
	struct list_head	node;
};
#define to_input_dev(d) container_of(d, struct input_dev, dev)

/*
 * Verify that we are in sync with input_device_id mod_devicetable.h #defines
 */

#if EV_MAX != INPUT_DEVICE_ID_EV_MAX
#error "EV_MAX and INPUT_DEVICE_ID_EV_MAX do not match"
#endif

#if KEY_MIN_INTERESTING != INPUT_DEVICE_ID_KEY_MIN_INTERESTING
#error "KEY_MIN_INTERESTING and INPUT_DEVICE_ID_KEY_MIN_INTERESTING do not match"
#endif

#if KEY_MAX != INPUT_DEVICE_ID_KEY_MAX
#error "KEY_MAX and INPUT_DEVICE_ID_KEY_MAX do not match"
#endif

#if REL_MAX != INPUT_DEVICE_ID_REL_MAX
#error "REL_MAX and INPUT_DEVICE_ID_REL_MAX do not match"
#endif

#if ABS_MAX != INPUT_DEVICE_ID_ABS_MAX
#error "ABS_MAX and INPUT_DEVICE_ID_ABS_MAX do not match"
#endif

#if MSC_MAX != INPUT_DEVICE_ID_MSC_MAX
#error "MSC_MAX and INPUT_DEVICE_ID_MSC_MAX do not match"
#endif

#if LED_MAX != INPUT_DEVICE_ID_LED_MAX
#error "LED_MAX and INPUT_DEVICE_ID_LED_MAX do not match"
#endif

#if SND_MAX != INPUT_DEVICE_ID_SND_MAX
#error "SND_MAX and INPUT_DEVICE_ID_SND_MAX do not match"
#endif

#if FF_MAX != INPUT_DEVICE_ID_FF_MAX
#error "FF_MAX and INPUT_DEVICE_ID_FF_MAX do not match"
#endif

#if SW_MAX != INPUT_DEVICE_ID_SW_MAX
#error "SW_MAX and INPUT_DEVICE_ID_SW_MAX do not match"
#endif

#define INPUT_DEVICE_ID_MATCH_DEVICE \
	(INPUT_DEVICE_ID_MATCH_BUS | INPUT_DEVICE_ID_MATCH_VENDOR | INPUT_DEVICE_ID_MATCH_PRODUCT)
#define INPUT_DEVICE_ID_MATCH_DEVICE_AND_VERSION \
	(INPUT_DEVICE_ID_MATCH_DEVICE | INPUT_DEVICE_ID_MATCH_VERSION)

struct input_handle;

/**
 * struct input_handler - implements one of interfaces for input devices
 * @private: driver-specific data
 * @event: event handler. This method is being called by input core with
 *	interrupts disabled and dev->event_lock spinlock held and so
 *	it may not sleep
 * @connect: called when attaching a handler to an input device
 * @disconnect: disconnects a handler from input device
 * @start: starts handler for given handle. This function is called by
 *	input core right after connect() method and also when a process
 *	that "grabbed" a device releases it
 * @fops: file operations this driver implements
 * @minor: beginning of range of 32 minors for devices this driver
 *	can provide
 * @name: name of the handler, to be shown in /proc/bus/input/handlers
 * @id_table: pointer to a table of input_device_ids this driver can
 *	handle
 * @blacklist: pointer to a table of input_device_ids this driver should
 *	ignore even if they match @id_table
 * @h_list: list of input handles associated with the handler
 * @node: for placing the driver onto input_handler_list
 *
 * Input handlers attach to input devices and create input handles. There
 * are likely several handlers attached to any given input device at the
 * same time. All of them will get their copy of input event generated by
 * the device.
 *
 * Note that input core serializes calls to connect() and disconnect()
 * methods.
 */
struct input_handler {

	void *private;

	void (*event)(struct input_handle *handle, unsigned int type, unsigned int code, int value);
	int (*connect)(struct input_handler *handler, struct input_dev *dev, const struct input_device_id *id);
	void (*disconnect)(struct input_handle *handle);
	void (*start)(struct input_handle *handle);

	const struct file_operations *fops;
	int minor;
	const char *name;

	const struct input_device_id *id_table;
	const struct input_device_id *blacklist;

	struct list_head	h_list;
	struct list_head	node;
};

/**
 * struct input_handle - links input device with an input handler
 * @private: handler-specific data
 * @open: counter showing whether the handle is 'open', i.e. should deliver
 *	events from its device
 * @name: name given to the handle by handler that created it
 * @dev: input device the handle is attached to
 * @handler: handler that works with the device through this handle
 * @d_node: used to put the handle on device's list of attached handles
 * @h_node: used to put the handle on handler's list of handles from which
 *	it gets events
 */
struct input_handle {

	void *private;

	int open;
	const char *name;

	struct input_dev *dev;
	struct input_handler *handler;

	struct list_head	d_node;
	struct list_head	h_node;
};

struct input_dev *input_allocate_device(void);
void input_free_device(struct input_dev *dev);

static inline struct input_dev *input_get_device(struct input_dev *dev)
{
	return dev ? to_input_dev(get_device(&dev->dev)) : NULL;
}

static inline void input_put_device(struct input_dev *dev)
{
	if (dev)
		put_device(&dev->dev);
}

static inline void *input_get_drvdata(struct input_dev *dev)
{
	return dev_get_drvdata(&dev->dev);
}

static inline void input_set_drvdata(struct input_dev *dev, void *data)
{
	dev_set_drvdata(&dev->dev, data);
}

int __must_check input_register_device(struct input_dev *);
void input_unregister_device(struct input_dev *);

int __must_check input_register_handler(struct input_handler *);
void input_unregister_handler(struct input_handler *);

int input_register_handle(struct input_handle *);
void input_unregister_handle(struct input_handle *);

int input_grab_device(struct input_handle *);
void input_release_device(struct input_handle *);

int input_open_device(struct input_handle *);
void input_close_device(struct input_handle *);

int input_flush_device(struct input_handle* handle, struct file* file);

void input_event(struct input_dev *dev, unsigned int type, unsigned int code, int value);
void input_inject_event(struct input_handle *handle, unsigned int type, unsigned int code, int value);

static inline void input_report_key(struct input_dev *dev, unsigned int code, int value)
{
	input_event(dev, EV_KEY, code, !!value);
}

static inline void input_report_rel(struct input_dev *dev, unsigned int code, int value)
{
	input_event(dev, EV_REL, code, value);
}

static inline void input_report_abs(struct input_dev *dev, unsigned int code, int value)
{
	input_event(dev, EV_ABS, code, value);
}

static inline void input_report_ff_status(struct input_dev *dev, unsigned int code, int value)
{
	input_event(dev, EV_FF_STATUS, code, value);
}

static inline void input_report_switch(struct input_dev *dev, unsigned int code, int value)
{
	input_event(dev, EV_SW, code, !!value);
}

static inline void input_sync(struct input_dev *dev)
{
	input_event(dev, EV_SYN, SYN_REPORT, 0);
}

static inline void input_mt_sync(struct input_dev *dev)
{
	input_event(dev, EV_SYN, SYN_MT_REPORT, 0);
}

void input_set_capability(struct input_dev *dev, unsigned int type, unsigned int code);

static inline void input_set_abs_params(struct input_dev *dev, int axis, int min, int max, int fuzz, int flat)
{
	dev->absmin[axis] = min;
	dev->absmax[axis] = max;
	dev->absfuzz[axis] = fuzz;
	dev->absflat[axis] = flat;

	dev->absbit[BIT_WORD(axis)] |= BIT_MASK(axis);
}

int input_get_keycode(struct input_dev *dev, int scancode, int *keycode);
int input_set_keycode(struct input_dev *dev, int scancode, int keycode);

extern struct class input_class;

/**
 * struct ff_device - force-feedback part of an input device
 * @upload: Called to upload an new effect into device
 * @erase: Called to erase an effect from device
 * @playback: Called to request device to start playing specified effect
 * @set_gain: Called to set specified gain
 * @set_autocenter: Called to auto-center device
 * @destroy: called by input core when parent input device is being
 *	destroyed
 * @private: driver-specific data, will be freed automatically
 * @ffbit: bitmap of force feedback capabilities truly supported by
 *	device (not emulated like ones in input_dev->ffbit)
 * @mutex: mutex for serializing access to the device
 * @max_effects: maximum number of effects supported by device
 * @effects: pointer to an array of effects currently loaded into device
 * @effect_owners: array of effect owners; when file handle owning
 *	an effect gets closed the effect is automatically erased
 *
 * Every force-feedback device must implement upload() and playback()
 * methods; erase() is optional. set_gain() and set_autocenter() need
 * only be implemented if driver sets up FF_GAIN and FF_AUTOCENTER
 * bits.
 *
 * Note that playback(), set_gain() and set_autocenter() are called with
 * dev->event_lock spinlock held and interrupts off and thus may not
 * sleep.
 */
struct ff_device {
	int (*upload)(struct input_dev *dev, struct ff_effect *effect,
		      struct ff_effect *old);
	int (*erase)(struct input_dev *dev, int effect_id);

	int (*playback)(struct input_dev *dev, int effect_id, int value);
	void (*set_gain)(struct input_dev *dev, u16 gain);
	void (*set_autocenter)(struct input_dev *dev, u16 magnitude);

	void (*destroy)(struct ff_device *);

	void *private;

	unsigned long ffbit[BITS_TO_LONGS(FF_CNT)];

	struct mutex mutex;

	int max_effects;
	struct ff_effect *effects;
	struct file *effect_owners[];
};

int input_ff_create(struct input_dev *dev, int max_effects);
void input_ff_destroy(struct input_dev *dev);

int input_ff_event(struct input_dev *dev, unsigned int type, unsigned int code, int value);

int input_ff_upload(struct input_dev *dev, struct ff_effect *effect, struct file *file);
int input_ff_erase(struct input_dev *dev, int effect_id, struct file *file);

int input_ff_create_memless(struct input_dev *dev, void *data,
		int (*play_effect)(struct input_dev *, void *, struct ff_effect *));

#endif
#endif