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Mauro Carvalho Chehab3f113e32010-04-08 15:10:27 -03001/*
2 * Remote Controller core raw events header
3 *
4 * Copyright (C) 2010 by Mauro Carvalho Chehab <mchehab@redhat.com>
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation version 2 of the License.
9 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
14 */
15
16#ifndef _IR_RAW_EVENT
17#define _IR_RAW_EVENT
18
19#include <linux/slab.h>
20#include <media/ir-core.h>
21
22struct ir_raw_handler {
23 struct list_head list;
24
David Härdeman667c9eb2010-06-13 17:29:31 -030025 u64 protocols; /* which are handled by this handler */
David Härdemane40b1122010-04-15 18:46:00 -030026 int (*decode)(struct input_dev *input_dev, struct ir_raw_event event);
Mauro Carvalho Chehab3f113e32010-04-08 15:10:27 -030027 int (*raw_register)(struct input_dev *input_dev);
28 int (*raw_unregister)(struct input_dev *input_dev);
29};
30
31struct ir_raw_event_ctrl {
32 struct work_struct rx_work; /* for the rx decoding workqueue */
33 struct kfifo kfifo; /* fifo for the pulse/space durations */
34 ktime_t last_event; /* when last event occurred */
35 enum raw_event_type last_type; /* last event type */
36 struct input_dev *input_dev; /* pointer to the parent input_dev */
David Härdeman667c9eb2010-06-13 17:29:31 -030037 u64 enabled_protocols; /* enabled raw protocol decoders */
Mauro Carvalho Chehab3f113e32010-04-08 15:10:27 -030038};
39
40/* macros for IR decoders */
Mauro Carvalho Chehab384f23e2010-04-20 18:50:54 -030041static inline bool geq_margin(unsigned d1, unsigned d2, unsigned margin)
42{
David Härdemane40b1122010-04-15 18:46:00 -030043 return d1 > (d2 - margin);
44}
Mauro Carvalho Chehab3f113e32010-04-08 15:10:27 -030045
Mauro Carvalho Chehab384f23e2010-04-20 18:50:54 -030046static inline bool eq_margin(unsigned d1, unsigned d2, unsigned margin)
47{
David Härdemane40b1122010-04-15 18:46:00 -030048 return ((d1 > (d2 - margin)) && (d1 < (d2 + margin)));
49}
50
Mauro Carvalho Chehab384f23e2010-04-20 18:50:54 -030051static inline bool is_transition(struct ir_raw_event *x, struct ir_raw_event *y)
52{
David Härdemane40b1122010-04-15 18:46:00 -030053 return x->pulse != y->pulse;
54}
55
Mauro Carvalho Chehab384f23e2010-04-20 18:50:54 -030056static inline void decrease_duration(struct ir_raw_event *ev, unsigned duration)
57{
David Härdemane40b1122010-04-15 18:46:00 -030058 if (duration > ev->duration)
59 ev->duration = 0;
60 else
61 ev->duration -= duration;
62}
63
64#define TO_US(duration) (((duration) + 500) / 1000)
65#define TO_STR(is_pulse) ((is_pulse) ? "pulse" : "space")
66#define IS_RESET(ev) (ev.duration == 0)
Mauro Carvalho Chehab3f113e32010-04-08 15:10:27 -030067
68/*
Mauro Carvalho Chehab3f113e32010-04-08 15:10:27 -030069 * Routines from ir-sysfs.c - Meant to be called only internally inside
70 * ir-core
71 */
72
73int ir_register_class(struct input_dev *input_dev);
74void ir_unregister_class(struct input_dev *input_dev);
75
76/*
77 * Routines from ir-raw-event.c to be used internally and by decoders
78 */
David Härdeman667c9eb2010-06-13 17:29:31 -030079u64 ir_raw_get_allowed_protocols(void);
Mauro Carvalho Chehab3f113e32010-04-08 15:10:27 -030080int ir_raw_event_register(struct input_dev *input_dev);
81void ir_raw_event_unregister(struct input_dev *input_dev);
Mauro Carvalho Chehab3f113e32010-04-08 15:10:27 -030082int ir_raw_handler_register(struct ir_raw_handler *ir_raw_handler);
83void ir_raw_handler_unregister(struct ir_raw_handler *ir_raw_handler);
84void ir_raw_init(void);
85
86
87/*
88 * Decoder initialization code
89 *
90 * Those load logic are called during ir-core init, and automatically
91 * loads the compiled decoders for their usage with IR raw events
92 */
93
94/* from ir-nec-decoder.c */
95#ifdef CONFIG_IR_NEC_DECODER_MODULE
96#define load_nec_decode() request_module("ir-nec-decoder")
97#else
98#define load_nec_decode() 0
99#endif
100
101/* from ir-rc5-decoder.c */
102#ifdef CONFIG_IR_RC5_DECODER_MODULE
103#define load_rc5_decode() request_module("ir-rc5-decoder")
104#else
105#define load_rc5_decode() 0
106#endif
107
David Härdeman784a4932010-04-08 20:04:40 -0300108/* from ir-rc6-decoder.c */
Mauro Carvalho Chehabf35473e2010-04-09 09:17:02 -0300109#ifdef CONFIG_IR_RC6_DECODER_MODULE
David Härdeman784a4932010-04-08 20:04:40 -0300110#define load_rc6_decode() request_module("ir-rc6-decoder")
111#else
112#define load_rc6_decode() 0
113#endif
114
David Härdemanbf670f62010-04-15 18:46:05 -0300115/* from ir-jvc-decoder.c */
116#ifdef CONFIG_IR_JVC_DECODER_MODULE
117#define load_jvc_decode() request_module("ir-jvc-decoder")
118#else
119#define load_jvc_decode() 0
120#endif
121
David Härdeman3fe29c82010-04-15 18:46:10 -0300122/* from ir-sony-decoder.c */
123#ifdef CONFIG_IR_SONY_DECODER_MODULE
124#define load_sony_decode() request_module("ir-sony-decoder")
125#else
126#define load_sony_decode() 0
127#endif
128
Mauro Carvalho Chehab3f113e32010-04-08 15:10:27 -0300129#endif /* _IR_RAW_EVENT */