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/*
* Remote Controller core raw events header
*
* Copyright (C) 2010 by Mauro Carvalho Chehab <mchehab@redhat.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 version 2 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#ifndef _IR_RAW_EVENT
#define _IR_RAW_EVENT
#include <linux/slab.h>
#include <media/ir-core.h>
struct ir_raw_handler {
struct list_head list;
int (*decode)(struct input_dev *input_dev, s64 duration);
int (*raw_register)(struct input_dev *input_dev);
int (*raw_unregister)(struct input_dev *input_dev);
};
struct ir_raw_event_ctrl {
struct work_struct rx_work; /* for the rx decoding workqueue */
struct kfifo kfifo; /* fifo for the pulse/space durations */
ktime_t last_event; /* when last event occurred */
enum raw_event_type last_type; /* last event type */
struct input_dev *input_dev; /* pointer to the parent input_dev */
};
/* macros for IR decoders */
#define PULSE(units) ((units))
#define SPACE(units) (-(units))
#define IS_RESET(duration) ((duration) == 0)
#define IS_PULSE(duration) ((duration) > 0)
#define IS_SPACE(duration) ((duration) < 0)
#define DURATION(duration) (abs((duration)))
#define IS_TRANSITION(x, y) ((x) * (y) < 0)
#define DECREASE_DURATION(duration, amount) \
do { \
if (IS_SPACE(duration)) \
duration += (amount); \
else if (IS_PULSE(duration)) \
duration -= (amount); \
} while (0)
#define TO_UNITS(duration, unit_len) \
((int)((duration) > 0 ? \
DIV_ROUND_CLOSEST(abs((duration)), (unit_len)) :\
-DIV_ROUND_CLOSEST(abs((duration)), (unit_len))))
#define TO_US(duration) ((int)TO_UNITS(duration, 1000))
/*
* Routines from ir-sysfs.c - Meant to be called only internally inside
* ir-core
*/
int ir_register_class(struct input_dev *input_dev);
void ir_unregister_class(struct input_dev *input_dev);
/*
* Routines from ir-raw-event.c to be used internally and by decoders
*/
int ir_raw_event_register(struct input_dev *input_dev);
void ir_raw_event_unregister(struct input_dev *input_dev);
static inline void ir_raw_event_reset(struct input_dev *input_dev)
{
ir_raw_event_store(input_dev, 0);
ir_raw_event_handle(input_dev);
}
int ir_raw_handler_register(struct ir_raw_handler *ir_raw_handler);
void ir_raw_handler_unregister(struct ir_raw_handler *ir_raw_handler);
void ir_raw_init(void);
/*
* Decoder initialization code
*
* Those load logic are called during ir-core init, and automatically
* loads the compiled decoders for their usage with IR raw events
*/
/* from ir-nec-decoder.c */
#ifdef CONFIG_IR_NEC_DECODER_MODULE
#define load_nec_decode() request_module("ir-nec-decoder")
#else
#define load_nec_decode() 0
#endif
/* from ir-rc5-decoder.c */
#ifdef CONFIG_IR_RC5_DECODER_MODULE
#define load_rc5_decode() request_module("ir-rc5-decoder")
#else
#define load_rc5_decode() 0
#endif
/* from ir-rc6-decoder.c */
#ifdef CONFIG_IR_RC6_DECODER_MODULE
#define load_rc6_decode() request_module("ir-rc6-decoder")
#else
#define load_rc6_decode() 0
#endif
#endif /* _IR_RAW_EVENT */
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