include/uapi/linux/input.h

Source file repositories/reference/linux-study-clean/include/uapi/linux/input.h

File Facts

System
Linux kernel
Corpus path
include/uapi/linux/input.h
Extension
.h
Size
16961 bytes
Lines
540
Domain
Core OS
Bucket
Core Kernel Interface
Inferred role
Core OS: implementation source
Status
source implementation candidate

Why This File Exists

Core operating-system implementation surface: boot, tasks, memory, VFS, syscall-facing interfaces, synchronization, credentials, and isolation.

Dependency Surface

Detected Declarations

Annotated Snippet

struct input_event {
#if (__BITS_PER_LONG != 32 || !defined(__USE_TIME_BITS64)) && !defined(__KERNEL__)
	struct timeval time;
#define input_event_sec time.tv_sec
#define input_event_usec time.tv_usec
#else
	__kernel_ulong_t __sec;
#if defined(__sparc__) && defined(__arch64__)
	unsigned int __usec;
	unsigned int __pad;
#else
	__kernel_ulong_t __usec;
#endif
#define input_event_sec  __sec
#define input_event_usec __usec
#endif
	__u16 type;
	__u16 code;
	__s32 value;
};

/*
 * Protocol version.
 */

#define EV_VERSION		0x010001

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

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

/**
 * struct input_absinfo - used by EVIOCGABS/EVIOCSABS ioctls
 * @value: latest reported value for the axis.
 * @minimum: specifies minimum value for the axis.
 * @maximum: specifies maximum value for the axis.
 * @fuzz: specifies fuzz value that is used to filter noise from
 *	the event stream.
 * @flat: values that are within this value will be discarded by
 *	joydev interface and reported as 0 instead.
 * @resolution: specifies resolution for the values reported for
 *	the axis.
 *
 * Note that input core does not clamp reported values to the
 * [minimum, maximum] limits, such task is left to userspace.
 *
 * The default resolution for main axes (ABS_X, ABS_Y, ABS_Z,
 * ABS_MT_POSITION_X, ABS_MT_POSITION_Y) is reported in units
 * per millimeter (units/mm), resolution for rotational axes
 * (ABS_RX, ABS_RY, ABS_RZ) is reported in units per radian.
 * The resolution for the size axes (ABS_MT_TOUCH_MAJOR,
 * ABS_MT_TOUCH_MINOR, ABS_MT_WIDTH_MAJOR, ABS_MT_WIDTH_MINOR)
 * is reported in units per millimeter (units/mm).
 * When INPUT_PROP_ACCELEROMETER is set the resolution changes.
 * The main axes (ABS_X, ABS_Y, ABS_Z) are then reported in
 * units per g (units/g) and in units per degree per second
 * (units/deg/s) for rotational axes (ABS_RX, ABS_RY, ABS_RZ).
 */
struct input_absinfo {
	__s32 value;
	__s32 minimum;
	__s32 maximum;
	__s32 fuzz;
	__s32 flat;
	__s32 resolution;
};

/**
 * struct input_keymap_entry - used by EVIOCGKEYCODE/EVIOCSKEYCODE ioctls
 * @scancode: scancode represented in machine-endian form.
 * @len: length of the scancode that resides in @scancode buffer.
 * @index: index in the keymap, may be used instead of scancode
 * @flags: allows to specify how kernel should handle the request. For
 *	example, setting INPUT_KEYMAP_BY_INDEX flag indicates that kernel
 *	should perform lookup in keymap by @index instead of @scancode
 * @keycode: key code assigned to this scancode
 *
 * The structure is used to retrieve and modify keymap data. Users have
 * option of performing lookup either by @scancode itself or by @index
 * in keymap entry. EVIOCGKEYCODE will also return scancode or index
 * (depending on which element was used to perform lookup).
 */
struct input_keymap_entry {

Annotation

Implementation Notes