mirror of https://gitee.com/openkylin/linux.git
181 lines
4.5 KiB
C
181 lines
4.5 KiB
C
/*
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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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u64 protocols; /* which are handled by this handler */
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int (*decode)(struct input_dev *input_dev, struct ir_raw_event event);
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/* These two should only be used by the lirc decoder */
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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 list_head list; /* to keep track of raw clients */
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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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u64 enabled_protocols; /* enabled raw protocol decoders */
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/* raw decoder state follows */
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struct ir_raw_event prev_ev;
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struct nec_dec {
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int state;
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unsigned count;
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u32 bits;
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} nec;
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struct rc5_dec {
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int state;
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u32 bits;
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unsigned count;
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unsigned wanted_bits;
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} rc5;
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struct rc6_dec {
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int state;
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u8 header;
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u32 body;
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bool toggle;
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unsigned count;
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unsigned wanted_bits;
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} rc6;
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struct sony_dec {
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int state;
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u32 bits;
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unsigned count;
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} sony;
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struct jvc_dec {
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int state;
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u16 bits;
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u16 old_bits;
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unsigned count;
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bool first;
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bool toggle;
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} jvc;
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struct lirc_codec {
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struct ir_input_dev *ir_dev;
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struct lirc_driver *drv;
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int lircdata;
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} lirc;
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};
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/* macros for IR decoders */
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static inline bool geq_margin(unsigned d1, unsigned d2, unsigned margin)
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{
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return d1 > (d2 - margin);
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}
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static inline bool eq_margin(unsigned d1, unsigned d2, unsigned margin)
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{
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return ((d1 > (d2 - margin)) && (d1 < (d2 + margin)));
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}
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static inline bool is_transition(struct ir_raw_event *x, struct ir_raw_event *y)
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{
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return x->pulse != y->pulse;
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}
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static inline void decrease_duration(struct ir_raw_event *ev, unsigned duration)
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{
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if (duration > ev->duration)
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ev->duration = 0;
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else
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ev->duration -= duration;
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}
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#define TO_US(duration) (((duration) + 500) / 1000)
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#define TO_STR(is_pulse) ((is_pulse) ? "pulse" : "space")
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#define IS_RESET(ev) (ev.duration == 0)
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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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u64 ir_raw_get_allowed_protocols(void);
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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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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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/* from ir-rc6-decoder.c */
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#ifdef CONFIG_IR_RC6_DECODER_MODULE
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#define load_rc6_decode() request_module("ir-rc6-decoder")
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#else
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#define load_rc6_decode() 0
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#endif
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/* from ir-jvc-decoder.c */
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#ifdef CONFIG_IR_JVC_DECODER_MODULE
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#define load_jvc_decode() request_module("ir-jvc-decoder")
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#else
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#define load_jvc_decode() 0
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#endif
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/* from ir-sony-decoder.c */
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#ifdef CONFIG_IR_SONY_DECODER_MODULE
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#define load_sony_decode() request_module("ir-sony-decoder")
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#else
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#define load_sony_decode() 0
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#endif
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/* from ir-lirc-codec.c */
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#ifdef CONFIG_IR_LIRC_CODEC_MODULE
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#define load_lirc_codec() request_module("ir-lirc-codec")
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#else
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#define load_lirc_codec() 0
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#endif
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#endif /* _IR_RAW_EVENT */
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