2 * Remote Controller core raw events header
4 * Copyright (C) 2010 by Mauro Carvalho Chehab <mchehab@redhat.com>
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.
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.
19 #include <linux/slab.h>
20 #include <media/ir-core.h>
22 struct ir_raw_handler {
23 struct list_head list;
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);
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 */
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) \
48 if (IS_SPACE(duration)) \
49 duration += (amount); \
50 else if (IS_PULSE(duration)) \
51 duration -= (amount); \
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))
61 * Routines from ir-sysfs.c - Meant to be called only internally inside
65 int ir_register_class(struct input_dev *input_dev);
66 void ir_unregister_class(struct input_dev *input_dev);
69 * Routines from ir-raw-event.c to be used internally and by decoders
71 int ir_raw_event_register(struct input_dev *input_dev);
72 void ir_raw_event_unregister(struct input_dev *input_dev);
73 static inline void ir_raw_event_reset(struct input_dev *input_dev)
75 ir_raw_event_store(input_dev, 0);
76 ir_raw_event_handle(input_dev);
78 int ir_raw_handler_register(struct ir_raw_handler *ir_raw_handler);
79 void ir_raw_handler_unregister(struct ir_raw_handler *ir_raw_handler);
80 void ir_raw_init(void);
84 * Decoder initialization code
86 * Those load logic are called during ir-core init, and automatically
87 * loads the compiled decoders for their usage with IR raw events
90 /* from ir-nec-decoder.c */
91 #ifdef CONFIG_IR_NEC_DECODER_MODULE
92 #define load_nec_decode() request_module("ir-nec-decoder")
94 #define load_nec_decode() 0
97 /* from ir-rc5-decoder.c */
98 #ifdef CONFIG_IR_RC5_DECODER_MODULE
99 #define load_rc5_decode() request_module("ir-rc5-decoder")
101 #define load_rc5_decode() 0
104 /* from ir-rc6-decoder.c */
105 #ifdef CONFIG_IR_RC6_DECODER_MODULE
106 #define load_rc6_decode() request_module("ir-rc6-decoder")
108 #define load_rc6_decode() 0
111 #endif /* _IR_RAW_EVENT */