112 lines
3.3 KiB
C
112 lines
3.3 KiB
C
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/*
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* Remote Controller core raw events header
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*
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* Copyright (C) 2010 by Mauro Carvalho Chehab <mchehab@redhat.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation version 2 of the License.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#ifndef _IR_RAW_EVENT
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#define _IR_RAW_EVENT
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#include <linux/slab.h>
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#include <media/ir-core.h>
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struct ir_raw_handler {
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struct list_head list;
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int (*decode)(struct input_dev *input_dev, s64 duration);
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int (*raw_register)(struct input_dev *input_dev);
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int (*raw_unregister)(struct input_dev *input_dev);
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};
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struct ir_raw_event_ctrl {
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struct work_struct rx_work; /* for the rx decoding workqueue */
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struct kfifo kfifo; /* fifo for the pulse/space durations */
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ktime_t last_event; /* when last event occurred */
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enum raw_event_type last_type; /* last event type */
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struct input_dev *input_dev; /* pointer to the parent input_dev */
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};
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/* macros for IR decoders */
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#define PULSE(units) ((units))
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#define SPACE(units) (-(units))
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#define IS_RESET(duration) ((duration) == 0)
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#define IS_PULSE(duration) ((duration) > 0)
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#define IS_SPACE(duration) ((duration) < 0)
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#define DURATION(duration) (abs((duration)))
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#define IS_TRANSITION(x, y) ((x) * (y) < 0)
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#define DECREASE_DURATION(duration, amount) \
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do { \
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if (IS_SPACE(duration)) \
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duration += (amount); \
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else if (IS_PULSE(duration)) \
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duration -= (amount); \
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} while (0)
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#define TO_UNITS(duration, unit_len) \
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((int)((duration) > 0 ? \
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DIV_ROUND_CLOSEST(abs((duration)), (unit_len)) :\
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-DIV_ROUND_CLOSEST(abs((duration)), (unit_len))))
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#define TO_US(duration) ((int)TO_UNITS(duration, 1000))
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/*
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* Routines from ir-keytable.c to be used internally on ir-core and decoders
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*/
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u32 ir_g_keycode_from_table(struct input_dev *input_dev,
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u32 scancode);
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/*
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* Routines from ir-sysfs.c - Meant to be called only internally inside
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* ir-core
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*/
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int ir_register_class(struct input_dev *input_dev);
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void ir_unregister_class(struct input_dev *input_dev);
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/*
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* Routines from ir-raw-event.c to be used internally and by decoders
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*/
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int ir_raw_event_register(struct input_dev *input_dev);
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void ir_raw_event_unregister(struct input_dev *input_dev);
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static inline void ir_raw_event_reset(struct input_dev *input_dev)
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{
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ir_raw_event_store(input_dev, 0);
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ir_raw_event_handle(input_dev);
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}
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int ir_raw_handler_register(struct ir_raw_handler *ir_raw_handler);
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void ir_raw_handler_unregister(struct ir_raw_handler *ir_raw_handler);
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void ir_raw_init(void);
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/*
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* Decoder initialization code
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*
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* Those load logic are called during ir-core init, and automatically
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* loads the compiled decoders for their usage with IR raw events
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*/
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/* from ir-nec-decoder.c */
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#ifdef CONFIG_IR_NEC_DECODER_MODULE
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#define load_nec_decode() request_module("ir-nec-decoder")
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#else
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#define load_nec_decode() 0
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#endif
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/* from ir-rc5-decoder.c */
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#ifdef CONFIG_IR_RC5_DECODER_MODULE
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#define load_rc5_decode() request_module("ir-rc5-decoder")
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#else
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#define load_rc5_decode() 0
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#endif
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#endif /* _IR_RAW_EVENT */
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