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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 | ||
25 | int (*decode)(struct input_dev *input_dev, s64 duration); | |
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 */ | |
39 | #define PULSE(units) ((units)) | |
40 | #define SPACE(units) (-(units)) | |
41 | #define IS_RESET(duration) ((duration) == 0) | |
42 | #define IS_PULSE(duration) ((duration) > 0) | |
43 | #define IS_SPACE(duration) ((duration) < 0) | |
44 | #define DURATION(duration) (abs((duration))) | |
45 | #define IS_TRANSITION(x, y) ((x) * (y) < 0) | |
46 | #define DECREASE_DURATION(duration, amount) \ | |
47 | do { \ | |
48 | if (IS_SPACE(duration)) \ | |
49 | duration += (amount); \ | |
50 | else if (IS_PULSE(duration)) \ | |
51 | duration -= (amount); \ | |
52 | } while (0) | |
53 | ||
54 | #define TO_UNITS(duration, unit_len) \ | |
55 | ((int)((duration) > 0 ? \ | |
56 | DIV_ROUND_CLOSEST(abs((duration)), (unit_len)) :\ | |
57 | -DIV_ROUND_CLOSEST(abs((duration)), (unit_len)))) | |
58 | #define TO_US(duration) ((int)TO_UNITS(duration, 1000)) | |
59 | ||
60 | /* | |
61 | * Routines from ir-keytable.c to be used internally on ir-core and decoders | |
62 | */ | |
63 | ||
64 | u32 ir_g_keycode_from_table(struct input_dev *input_dev, | |
65 | u32 scancode); | |
66 | ||
67 | /* | |
68 | * Routines from ir-sysfs.c - Meant to be called only internally inside | |
69 | * ir-core | |
70 | */ | |
71 | ||
72 | int ir_register_class(struct input_dev *input_dev); | |
73 | void ir_unregister_class(struct input_dev *input_dev); | |
74 | ||
75 | /* | |
76 | * Routines from ir-raw-event.c to be used internally and by decoders | |
77 | */ | |
78 | int ir_raw_event_register(struct input_dev *input_dev); | |
79 | void ir_raw_event_unregister(struct input_dev *input_dev); | |
80 | static inline void ir_raw_event_reset(struct input_dev *input_dev) | |
81 | { | |
82 | ir_raw_event_store(input_dev, 0); | |
83 | ir_raw_event_handle(input_dev); | |
84 | } | |
85 | int ir_raw_handler_register(struct ir_raw_handler *ir_raw_handler); | |
86 | void ir_raw_handler_unregister(struct ir_raw_handler *ir_raw_handler); | |
87 | void ir_raw_init(void); | |
88 | ||
89 | ||
90 | /* | |
91 | * Decoder initialization code | |
92 | * | |
93 | * Those load logic are called during ir-core init, and automatically | |
94 | * loads the compiled decoders for their usage with IR raw events | |
95 | */ | |
96 | ||
97 | /* from ir-nec-decoder.c */ | |
98 | #ifdef CONFIG_IR_NEC_DECODER_MODULE | |
99 | #define load_nec_decode() request_module("ir-nec-decoder") | |
100 | #else | |
101 | #define load_nec_decode() 0 | |
102 | #endif | |
103 | ||
104 | /* from ir-rc5-decoder.c */ | |
105 | #ifdef CONFIG_IR_RC5_DECODER_MODULE | |
106 | #define load_rc5_decode() request_module("ir-rc5-decoder") | |
107 | #else | |
108 | #define load_rc5_decode() 0 | |
109 | #endif | |
110 | ||
111 | #endif /* _IR_RAW_EVENT */ |