8cde810016
The MT slots devices all follow the same initialization pattern of creating slots and hinting about buffer size. Let drivers call an initialization function instead, and make sure it can be called repeatedly without side effects. Signed-off-by: Henrik Rydberg <rydberg@euromail.se>
44 lines
1 KiB
C
44 lines
1 KiB
C
#ifndef _INPUT_MT_H
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#define _INPUT_MT_H
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/*
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* Input Multitouch Library
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*
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* Copyright (c) 2010 Henrik Rydberg
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 as published by
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* the Free Software Foundation.
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*/
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#include <linux/input.h>
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/**
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* struct input_mt_slot - represents the state of an input MT slot
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* @abs: holds current values of ABS_MT axes for this slot
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*/
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struct input_mt_slot {
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int abs[ABS_MT_LAST - ABS_MT_FIRST + 1];
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};
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static inline void input_mt_set_value(struct input_mt_slot *slot,
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unsigned code, int value)
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{
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slot->abs[code - ABS_MT_FIRST] = value;
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}
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static inline int input_mt_get_value(const struct input_mt_slot *slot,
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unsigned code)
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{
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return slot->abs[code - ABS_MT_FIRST];
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}
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int input_mt_init_slots(struct input_dev *dev, unsigned int num_slots);
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void input_mt_destroy_slots(struct input_dev *dev);
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static inline void input_mt_slot(struct input_dev *dev, int slot)
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{
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input_event(dev, EV_ABS, ABS_MT_SLOT, slot);
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}
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#endif
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