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/rc-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 rc_dev *dev, struct ir_raw_event event);
29 /* These two should only be used by the lirc decoder */
30 int (*raw_register)(struct rc_dev *dev);
31 int (*raw_unregister)(struct rc_dev *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 rc_dev *dev; /* pointer to the parent rc_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 input_dev *idev;
89 struct timer_list rx_timeout;
100 struct lirc_driver *drv;
106 bool send_timeout_reports;
111 /* macros for IR decoders */
112 static inline bool geq_margin(unsigned d1, unsigned d2, unsigned margin)
114 return d1 > (d2 - margin);
117 static inline bool eq_margin(unsigned d1, unsigned d2, unsigned margin)
119 return ((d1 > (d2 - margin)) && (d1 < (d2 + margin)));
122 static inline bool is_transition(struct ir_raw_event *x, struct ir_raw_event *y)
124 return x->pulse != y->pulse;
127 static inline void decrease_duration(struct ir_raw_event *ev, unsigned duration)
129 if (duration > ev->duration)
132 ev->duration -= duration;
135 /* Returns true if event is normal pulse/space event */
136 static inline bool is_timing_event(struct ir_raw_event ev)
138 return !ev.carrier_report && !ev.reset;
141 #define TO_US(duration) DIV_ROUND_CLOSEST((duration), 1000)
142 #define TO_STR(is_pulse) ((is_pulse) ? "pulse" : "space")
145 * Routines from rc-raw.c to be used internally and by decoders
147 u64 ir_raw_get_allowed_protocols(void);
148 int ir_raw_event_register(struct rc_dev *dev);
149 void ir_raw_event_unregister(struct rc_dev *dev);
150 int ir_raw_handler_register(struct ir_raw_handler *ir_raw_handler);
151 void ir_raw_handler_unregister(struct ir_raw_handler *ir_raw_handler);
152 void ir_raw_init(void);
155 * Decoder initialization code
157 * Those load logic are called during ir-core init, and automatically
158 * loads the compiled decoders for their usage with IR raw events
161 /* from ir-nec-decoder.c */
162 #ifdef CONFIG_IR_NEC_DECODER_MODULE
163 #define load_nec_decode() request_module("ir-nec-decoder")
165 #define load_nec_decode() 0
168 /* from ir-rc5-decoder.c */
169 #ifdef CONFIG_IR_RC5_DECODER_MODULE
170 #define load_rc5_decode() request_module("ir-rc5-decoder")
172 #define load_rc5_decode() 0
175 /* from ir-rc6-decoder.c */
176 #ifdef CONFIG_IR_RC6_DECODER_MODULE
177 #define load_rc6_decode() request_module("ir-rc6-decoder")
179 #define load_rc6_decode() 0
182 /* from ir-jvc-decoder.c */
183 #ifdef CONFIG_IR_JVC_DECODER_MODULE
184 #define load_jvc_decode() request_module("ir-jvc-decoder")
186 #define load_jvc_decode() 0
189 /* from ir-sony-decoder.c */
190 #ifdef CONFIG_IR_SONY_DECODER_MODULE
191 #define load_sony_decode() request_module("ir-sony-decoder")
193 #define load_sony_decode() 0
196 /* from ir-mce_kbd-decoder.c */
197 #ifdef CONFIG_IR_MCE_KBD_DECODER_MODULE
198 #define load_mce_kbd_decode() request_module("ir-mce_kbd-decoder")
200 #define load_mce_kbd_decode() 0
203 /* from ir-lirc-codec.c */
204 #ifdef CONFIG_IR_LIRC_CODEC_MODULE
205 #define load_lirc_codec() request_module("ir-lirc-codec")
207 #define load_lirc_codec() 0
211 #endif /* _RC_CORE_PRIV */