input.h

宋宝华的《Linux设备驱动开发详解》第一版的源代码

#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_MAX			0x3f

/*
 * Switch events
 */

#define SW_0		0x00
#define SW_1		0x01
#define SW_2		0x02
#define SW_3		0x03
#define SW_4		0x04
#define SW_5		0x05
#define SW_6		0x06
#define SW_7		0x07
#define SW_MAX		0x0f

/*
 * 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

/*
 * 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

/*
 * 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

/*
 * 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_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

/*
 * Values describing the status of an 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
 * The first structures are not passed directly by using ioctls.
 * They are sub-structures of the actually sent structure (called ff_effect)
 */

struct ff_replay {
	__u16 length; /* Duration of an effect in ms. All other times are also expressed in ms */
	__u16 delay;  /* Time to wait before to start playing an effect */
};

struct ff_trigger {
	__u16 button;   /* Number of button triggering an effect */
	__u16 interval; /* Time to wait before an effect can be re-triggered (ms) */
};

struct ff_envelope {
	__u16 attack_length;	/* Duration of attack (ms) */
	__u16 attack_level;	/* Level at beginning of attack */
	__u16 fade_length;	/* Duration of fade (ms) */
	__u16 fade_level;	/* Level at end of fade */
};

/* FF_CONSTANT */
struct ff_constant_effect {
	__s16 level;	    /* Strength of effect. Negative values are OK */
	struct ff_envelope envelope;
};

/* FF_RAMP */
struct ff_ramp_effect {
	__s16 start_level;
	__s16 end_level;
	struct ff_envelope envelope;
};

/* FF_SPRING of FF_FRICTION */
struct ff_condition_effect {
	__u16 right_saturation; /* Max level when joystick is on the right */
	__u16 left_saturation;  /* Max level when joystick in on the left */

	__s16 right_coeff;	/* Indicates how fast the force grows when the
				   joystick moves to the right */
	__s16 left_coeff;	/* Same for left side */

	__u16 deadband;	/* Size of area where no force is produced */
	__s16 center;	/* Position of dead zone */

};

/* FF_PERIODIC */
struct ff_periodic_effect {
	__u16 waveform;	/* Kind of wave (sine, square...) */
	__u16 period;	/* in ms */
	__s16 magnitude;	/* Peak value */
	__s16 offset;	/* Mean value of wave (roughly) */
	__u16 phase;		/* 'Horizontal' shift */

	struct ff_envelope envelope;

/* Only used if waveform == FF_CUSTOM */
	__u32 custom_len;	/* Number of samples */
	__s16 *custom_data;	/* Buffer of samples */
/* Note: the data pointed by custom_data is copied by the driver. You can
 * therefore dispose of the memory after the upload/update */
};

/* FF_RUMBLE */
/* Some rumble pads have two motors of different weight.
   strong_magnitude represents the magnitude of the vibration generated
   by the heavy motor.
*/
struct ff_rumble_effect {
	__u16 strong_magnitude;  /* Magnitude of the heavy motor */
	__u16 weak_magnitude;    /* Magnitude of the light one */
};

/*
 * Structure sent through ioctl from the application to the driver
 */
struct ff_effect {
	__u16 type;
/* Following field denotes the unique id assigned to an effect.
 * If user sets if to -1, a new effect is created, and its id is returned in the same field
 * Else, the user sets it to the effect id it wants to update.
 */
	__s16 id;

	__u16 direction;	/* Direction. 0 deg -> 0x0000 (down)
					     90 deg -> 0x4000 (left)
					    180 deg -> 0x8000 (up)
					    270 deg -> 0xC000 (right)
				*/

	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

/*
 * 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

/*
 * Set ff device properties
 */

#define FF_GAIN		0x60
#define FF_AUTOCENTER	0x61

#define FF_MAX		0x7f

struct input_device_id {

	kernel_ulong_t flags;

	struct input_id id;

	kernel_ulong_t evbit[EV_MAX/BITS_PER_LONG+1];
	kernel_ulong_t keybit[KEY_MAX/BITS_PER_LONG+1];
	kernel_ulong_t relbit[REL_MAX/BITS_PER_LONG+1];
	kernel_ulong_t absbit[ABS_MAX/BITS_PER_LONG+1];
	kernel_ulong_t mscbit[MSC_MAX/BITS_PER_LONG+1];
	kernel_ulong_t ledbit[LED_MAX/BITS_PER_LONG+1];
	kernel_ulong_t sndbit[SND_MAX/BITS_PER_LONG+1];
	kernel_ulong_t ffbit[FF_MAX/BITS_PER_LONG+1];
	kernel_ulong_t swbit[SW_MAX/BITS_PER_LONG+1];

	kernel_ulong_t driver_info;
};

/*
 * Structure for hotplug & device<->driver matching.
 */

#define INPUT_DEVICE_ID_MATCH_BUS	1
#define INPUT_DEVICE_ID_MATCH_VENDOR	2
#define INPUT_DEVICE_ID_MATCH_PRODUCT	4
#define INPUT_DEVICE_ID_MATCH_VERSION	8

#define INPUT_DEVICE_ID_MATCH_EVBIT	0x010
#define INPUT_DEVICE_ID_MATCH_KEYBIT	0x020
#define INPUT_DEVICE_ID_MATCH_RELBIT	0x040
#define INPUT_DEVICE_ID_MATCH_ABSBIT	0x080
#define INPUT_DEVICE_ID_MATCH_MSCIT	0x100
#define INPUT_DEVICE_ID_MATCH_LEDBIT	0x200
#define INPUT_DEVICE_ID_MATCH_SNDBIT	0x400
#define INPUT_DEVICE_ID_MATCH_FFBIT	0x800
#define INPUT_DEVICE_ID_MATCH_SWBIT	0x1000

#ifdef __KERNEL__

/*
 * In-kernel definitions.
 */

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

#define NBITS(x) (((x)/BITS_PER_LONG)+1)
#define BIT(x)	(1UL<<((x)%BITS_PER_LONG))
#define LONG(x) ((x)/BITS_PER_LONG)

#define INPUT_KEYCODE(dev, scancode) ((dev->keycodesize == 1) ? ((u8*)dev->keycode)[scancode] : \
	((dev->keycodesize == 2) ? ((u16*)dev->keycode)[scancode] : (((u32*)dev->keycode)[scancode])))

#define SET_INPUT_KEYCODE(dev, scancode, val)			\
		({	unsigned __old;				\
		switch (dev->keycodesize) {			\
			case 1: {				\
				u8 *k = (u8 *)dev->keycode;	\
				__old = k[scancode];		\
				k[scancode] = val;		\
				break;				\
			}					\
			case 2: {				\
				u16 *k = (u16 *)dev->keycode;	\
				__old = k[scancode];		\
				k[scancode] = val;		\
				break;				\
			}					\
			default: {				\
				u32 *k = (u32 *)dev->keycode;	\
				__old = k[scancode];		\
				k[scancode] = val;		\
				break;				\
			}					\
		}						\
		__old; })

struct input_dev {

	void *private;

	const char *name;
	const char *phys;
	const char *uniq;
	struct input_id id;

	unsigned long evbit[NBITS(EV_MAX)];
	unsigned long keybit[NBITS(KEY_MAX)];
	unsigned long relbit[NBITS(REL_MAX)];
	unsigned long absbit[NBITS(ABS_MAX)];
	unsigned long mscbit[NBITS(MSC_MAX)];
	unsigned long ledbit[NBITS(LED_MAX)];
	unsigned long sndbit[NBITS(SND_MAX)];
	unsigned long ffbit[NBITS(FF_MAX)];
	unsigned long swbit[NBITS(SW_MAX)];
	int ff_effects_max;

	unsigned int keycodemax;
	unsigned int keycodesize;
	void *keycode;

	unsigned int repeat_key;
	struct timer_list timer;

	struct pt_regs *regs;
	int state;

	int sync;

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

	unsigned long key[NBITS(KEY_MAX)];
	unsigned long led[NBITS(LED_MAX)];
	unsigned long snd[NBITS(SND_MAX)];
	unsigned long sw[NBITS(SW_MAX)];

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

	int (*open)(struct input_dev *dev);
	void (*close)(struct input_dev *dev);
	int (*accept)(struct input_dev *dev, struct file *file);
	int (*flush)(struct input_dev *dev, struct file *file);
	int (*event)(struct input_dev *dev, unsigned int type, unsigned int code, int value);
	int (*upload_effect)(struct input_dev *dev, struct ff_effect *effect);
	int (*erase_effect)(struct input_dev *dev, int effect_id);

	struct input_handle *grab;

	struct semaphore sem;	/* serializes open and close operations */
	unsigned int users;

	struct class_device cdev;
	struct device *dev;	/* will be removed soon */

	int dynalloc;	/* temporarily */

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

#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 {

	void *private;

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

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

	struct input_device_id *id_table;
	struct input_device_id *blacklist;

	struct list_head	h_list;
	struct list_head	node;
};

struct input_handle {

	void *private;

	int open;
	char *name;

	struct input_dev *dev;
	struct input_handler *handler;

	struct list_head	d_node;
	struct list_head	h_node;
};

#define to_dev(n) container_of(n,struct input_dev,node)
#define to_handler(n) container_of(n,struct input_handler,node);
#define to_handle(n) container_of(n,struct input_handle,d_node)
#define to_handle_h(n) container_of(n,struct input_handle,h_node)

static inline void init_input_dev(struct input_dev *dev)
{
	INIT_LIST_HEAD(&dev->h_list);
	INIT_LIST_HEAD(&dev->node);
}

struct input_dev *input_allocate_device(void);

static inline void input_free_device(struct input_dev *dev)
{
	kfree(dev);
}

static inline struct input_dev *input_get_device(struct input_dev *dev)
{
	return to_input_dev(class_device_get(&dev->cdev));
}

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

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

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

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_accept_process(struct input_handle *handle, struct file *file);
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);

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(struct input_dev *dev, unsigned int code, int value)
{
	input_event(dev, EV_FF, 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_regs(struct input_dev *dev, struct pt_regs *regs)
{
	dev->regs = regs;
}

static inline void input_sync(struct input_dev *dev)
{
	input_event(dev, EV_SYN, SYN_REPORT, 0);
	dev->regs = NULL;
}

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[LONG(axis)] |= BIT(axis);
}

extern struct class input_class;

#endif
#endif