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3f113e36 MCC |
1 | /* |
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 | ||
22 | struct ir_raw_handler { | |
23 | struct list_head list; | |
24 | ||
e40b1127 | 25 | int (*decode)(struct input_dev *input_dev, struct ir_raw_event event); |
3f113e36 MCC |
26 | int (*raw_register)(struct input_dev *input_dev); |
27 | int (*raw_unregister)(struct input_dev *input_dev); | |
28 | }; | |
29 | ||
30 | struct ir_raw_event_ctrl { | |
31 | struct work_struct rx_work; /* for the rx decoding workqueue */ | |
32 | struct kfifo kfifo; /* fifo for the pulse/space durations */ | |
33 | ktime_t last_event; /* when last event occurred */ | |
34 | enum raw_event_type last_type; /* last event type */ | |
35 | struct input_dev *input_dev; /* pointer to the parent input_dev */ | |
36 | }; | |
37 | ||
38 | /* macros for IR decoders */ | |
e40b1127 DH |
39 | static inline bool geq_margin(unsigned d1, unsigned d2, unsigned margin) { |
40 | return d1 > (d2 - margin); | |
41 | } | |
42 | ||
43 | static inline bool eq_margin(unsigned d1, unsigned d2, unsigned margin) { | |
44 | return ((d1 > (d2 - margin)) && (d1 < (d2 + margin))); | |
45 | } | |
46 | ||
47 | static inline bool is_transition(struct ir_raw_event *x, struct ir_raw_event *y) { | |
48 | return x->pulse != y->pulse; | |
49 | } | |
50 | ||
51 | static inline void decrease_duration(struct ir_raw_event *ev, unsigned duration) { | |
52 | if (duration > ev->duration) | |
53 | ev->duration = 0; | |
54 | else | |
55 | ev->duration -= duration; | |
56 | } | |
57 | ||
58 | #define TO_US(duration) (((duration) + 500) / 1000) | |
59 | #define TO_STR(is_pulse) ((is_pulse) ? "pulse" : "space") | |
60 | #define IS_RESET(ev) (ev.duration == 0) | |
3f113e36 | 61 | |
3f113e36 MCC |
62 | /* |
63 | * Routines from ir-sysfs.c - Meant to be called only internally inside | |
64 | * ir-core | |
65 | */ | |
66 | ||
67 | int ir_register_class(struct input_dev *input_dev); | |
68 | void ir_unregister_class(struct input_dev *input_dev); | |
69 | ||
70 | /* | |
71 | * Routines from ir-raw-event.c to be used internally and by decoders | |
72 | */ | |
73 | int ir_raw_event_register(struct input_dev *input_dev); | |
74 | void ir_raw_event_unregister(struct input_dev *input_dev); | |
3f113e36 MCC |
75 | int ir_raw_handler_register(struct ir_raw_handler *ir_raw_handler); |
76 | void ir_raw_handler_unregister(struct ir_raw_handler *ir_raw_handler); | |
77 | void ir_raw_init(void); | |
78 | ||
79 | ||
80 | /* | |
81 | * Decoder initialization code | |
82 | * | |
83 | * Those load logic are called during ir-core init, and automatically | |
84 | * loads the compiled decoders for their usage with IR raw events | |
85 | */ | |
86 | ||
87 | /* from ir-nec-decoder.c */ | |
88 | #ifdef CONFIG_IR_NEC_DECODER_MODULE | |
89 | #define load_nec_decode() request_module("ir-nec-decoder") | |
90 | #else | |
91 | #define load_nec_decode() 0 | |
92 | #endif | |
93 | ||
94 | /* from ir-rc5-decoder.c */ | |
95 | #ifdef CONFIG_IR_RC5_DECODER_MODULE | |
96 | #define load_rc5_decode() request_module("ir-rc5-decoder") | |
97 | #else | |
98 | #define load_rc5_decode() 0 | |
99 | #endif | |
100 | ||
784a4931 | 101 | /* from ir-rc6-decoder.c */ |
f35473e6 | 102 | #ifdef CONFIG_IR_RC6_DECODER_MODULE |
784a4931 DH |
103 | #define load_rc6_decode() request_module("ir-rc6-decoder") |
104 | #else | |
105 | #define load_rc6_decode() 0 | |
106 | #endif | |
107 | ||
3f113e36 | 108 | #endif /* _IR_RAW_EVENT */ |