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 u64 protocols; /* which are handled by this handler */
26 int (*decode)(struct input_dev *input_dev, struct ir_raw_event event);
28 /* These two should only be used by the lirc decoder */
29 int (*raw_register)(struct input_dev *input_dev);
30 int (*raw_unregister)(struct input_dev *input_dev);
33 struct ir_raw_event_ctrl {
34 struct list_head list; /* to keep track of raw clients */
35 struct work_struct rx_work; /* for the rx decoding workqueue */
36 struct kfifo kfifo; /* fifo for the pulse/space durations */
37 ktime_t last_event; /* when last event occurred */
38 enum raw_event_type last_type; /* last event type */
39 struct input_dev *input_dev; /* pointer to the parent input_dev */
40 u64 enabled_protocols; /* enabled raw protocol decoders */
42 /* raw decoder state follows */
43 struct ir_raw_event prev_ev;
77 struct ir_input_dev *ir_dev;
78 struct lirc_driver *drv;
83 /* macros for IR decoders */
84 static inline bool geq_margin(unsigned d1, unsigned d2, unsigned margin)
86 return d1 > (d2 - margin);
89 static inline bool eq_margin(unsigned d1, unsigned d2, unsigned margin)
91 return ((d1 > (d2 - margin)) && (d1 < (d2 + margin)));
94 static inline bool is_transition(struct ir_raw_event *x, struct ir_raw_event *y)
96 return x->pulse != y->pulse;
99 static inline void decrease_duration(struct ir_raw_event *ev, unsigned duration)
101 if (duration > ev->duration)
104 ev->duration -= duration;
107 #define TO_US(duration) (((duration) + 500) / 1000)
108 #define TO_STR(is_pulse) ((is_pulse) ? "pulse" : "space")
109 #define IS_RESET(ev) (ev.duration == 0)
112 * Routines from ir-sysfs.c - Meant to be called only internally inside
116 int ir_register_class(struct input_dev *input_dev);
117 void ir_unregister_class(struct input_dev *input_dev);
120 * Routines from ir-raw-event.c to be used internally and by decoders
122 u64 ir_raw_get_allowed_protocols(void);
123 int ir_raw_event_register(struct input_dev *input_dev);
124 void ir_raw_event_unregister(struct input_dev *input_dev);
125 int ir_raw_handler_register(struct ir_raw_handler *ir_raw_handler);
126 void ir_raw_handler_unregister(struct ir_raw_handler *ir_raw_handler);
127 void ir_raw_init(void);
131 * Decoder initialization code
133 * Those load logic are called during ir-core init, and automatically
134 * loads the compiled decoders for their usage with IR raw events
137 /* from ir-nec-decoder.c */
138 #ifdef CONFIG_IR_NEC_DECODER_MODULE
139 #define load_nec_decode() request_module("ir-nec-decoder")
141 #define load_nec_decode() 0
144 /* from ir-rc5-decoder.c */
145 #ifdef CONFIG_IR_RC5_DECODER_MODULE
146 #define load_rc5_decode() request_module("ir-rc5-decoder")
148 #define load_rc5_decode() 0
151 /* from ir-rc6-decoder.c */
152 #ifdef CONFIG_IR_RC6_DECODER_MODULE
153 #define load_rc6_decode() request_module("ir-rc6-decoder")
155 #define load_rc6_decode() 0
158 /* from ir-jvc-decoder.c */
159 #ifdef CONFIG_IR_JVC_DECODER_MODULE
160 #define load_jvc_decode() request_module("ir-jvc-decoder")
162 #define load_jvc_decode() 0
165 /* from ir-sony-decoder.c */
166 #ifdef CONFIG_IR_SONY_DECODER_MODULE
167 #define load_sony_decode() request_module("ir-sony-decoder")
169 #define load_sony_decode() 0
172 /* from ir-lirc-codec.c */
173 #ifdef CONFIG_IR_LIRC_CODEC_MODULE
174 #define load_lirc_codec() request_module("ir-lirc-codec")
176 #define load_lirc_codec() 0
180 #endif /* _IR_RAW_EVENT */