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 <linux/spinlock.h>
21 #include <media/ir-core.h>
23 struct ir_raw_handler {
24 struct list_head list;
26 u64 protocols; /* which are handled by this handler */
27 int (*decode)(struct input_dev *input_dev, struct ir_raw_event event);
29 /* These two should only be used by the lirc decoder */
30 int (*raw_register)(struct input_dev *input_dev);
31 int (*raw_unregister)(struct input_dev *input_dev);
34 struct ir_raw_event_ctrl {
35 struct list_head list; /* to keep track of raw clients */
36 struct task_struct *thread;
38 struct kfifo kfifo; /* fifo for the pulse/space durations */
39 ktime_t last_event; /* when last event occurred */
40 enum raw_event_type last_type; /* last event type */
41 struct input_dev *input_dev; /* pointer to the parent input_dev */
42 u64 enabled_protocols; /* enabled raw protocol decoders */
44 /* raw decoder state follows */
45 struct ir_raw_event prev_ev;
46 struct ir_raw_event this_ev;
88 struct ir_input_dev *ir_dev;
89 struct lirc_driver *drv;
94 /* macros for IR decoders */
95 static inline bool geq_margin(unsigned d1, unsigned d2, unsigned margin)
97 return d1 > (d2 - margin);
100 static inline bool eq_margin(unsigned d1, unsigned d2, unsigned margin)
102 return ((d1 > (d2 - margin)) && (d1 < (d2 + margin)));
105 static inline bool is_transition(struct ir_raw_event *x, struct ir_raw_event *y)
107 return x->pulse != y->pulse;
110 static inline void decrease_duration(struct ir_raw_event *ev, unsigned duration)
112 if (duration > ev->duration)
115 ev->duration -= duration;
118 #define TO_US(duration) DIV_ROUND_CLOSEST((duration), 1000)
119 #define TO_STR(is_pulse) ((is_pulse) ? "pulse" : "space")
120 #define IS_RESET(ev) (ev.duration == 0)
122 * Routines from ir-sysfs.c - Meant to be called only internally inside
125 int ir_register_input(struct input_dev *input_dev);
127 int ir_register_class(struct input_dev *input_dev);
128 void ir_unregister_class(struct input_dev *input_dev);
131 * Routines from ir-raw-event.c to be used internally and by decoders
133 u64 ir_raw_get_allowed_protocols(void);
134 int ir_raw_event_register(struct input_dev *input_dev);
135 void ir_raw_event_unregister(struct input_dev *input_dev);
136 int ir_raw_handler_register(struct ir_raw_handler *ir_raw_handler);
137 void ir_raw_handler_unregister(struct ir_raw_handler *ir_raw_handler);
138 void ir_raw_init(void);
140 int ir_rcmap_init(void);
141 void ir_rcmap_cleanup(void);
143 * Decoder initialization code
145 * Those load logic are called during ir-core init, and automatically
146 * loads the compiled decoders for their usage with IR raw events
149 /* from ir-nec-decoder.c */
150 #ifdef CONFIG_IR_NEC_DECODER_MODULE
151 #define load_nec_decode() request_module("ir-nec-decoder")
153 #define load_nec_decode() 0
156 /* from ir-rc5-decoder.c */
157 #ifdef CONFIG_IR_RC5_DECODER_MODULE
158 #define load_rc5_decode() request_module("ir-rc5-decoder")
160 #define load_rc5_decode() 0
163 /* from ir-rc6-decoder.c */
164 #ifdef CONFIG_IR_RC6_DECODER_MODULE
165 #define load_rc6_decode() request_module("ir-rc6-decoder")
167 #define load_rc6_decode() 0
170 /* from ir-jvc-decoder.c */
171 #ifdef CONFIG_IR_JVC_DECODER_MODULE
172 #define load_jvc_decode() request_module("ir-jvc-decoder")
174 #define load_jvc_decode() 0
177 /* from ir-sony-decoder.c */
178 #ifdef CONFIG_IR_SONY_DECODER_MODULE
179 #define load_sony_decode() request_module("ir-sony-decoder")
181 #define load_sony_decode() 0
184 /* from ir-lirc-codec.c */
185 #ifdef CONFIG_IR_LIRC_CODEC_MODULE
186 #define load_lirc_codec() request_module("ir-lirc-codec")
188 #define load_lirc_codec() 0
192 #endif /* _IR_RAW_EVENT */