2 * Remote Controller core raw events header
4 * Copyright (C) 2010 by Mauro Carvalho Chehab
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_rec_ptr_1 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 */
43 /* raw decoder state follows */
44 struct ir_raw_event prev_ev
;
45 struct ir_raw_event this_ev
;
89 unsigned int pulse_len
;
92 struct input_dev
*idev
;
93 struct timer_list rx_timeout
;
100 unsigned wanted_bits
;
104 struct lirc_driver
*drv
;
110 bool send_timeout_reports
;
120 /* macros for IR decoders */
121 static inline bool geq_margin(unsigned d1
, unsigned d2
, unsigned margin
)
123 return d1
> (d2
- margin
);
126 static inline bool eq_margin(unsigned d1
, unsigned d2
, unsigned margin
)
128 return ((d1
> (d2
- margin
)) && (d1
< (d2
+ margin
)));
131 static inline bool is_transition(struct ir_raw_event
*x
, struct ir_raw_event
*y
)
133 return x
->pulse
!= y
->pulse
;
136 static inline void decrease_duration(struct ir_raw_event
*ev
, unsigned duration
)
138 if (duration
> ev
->duration
)
141 ev
->duration
-= duration
;
144 /* Returns true if event is normal pulse/space event */
145 static inline bool is_timing_event(struct ir_raw_event ev
)
147 return !ev
.carrier_report
&& !ev
.reset
;
150 #define TO_US(duration) DIV_ROUND_CLOSEST((duration), 1000)
151 #define TO_STR(is_pulse) ((is_pulse) ? "pulse" : "space")
154 * Routines from rc-raw.c to be used internally and by decoders
156 u64
ir_raw_get_allowed_protocols(void);
157 int ir_raw_event_register(struct rc_dev
*dev
);
158 void ir_raw_event_unregister(struct rc_dev
*dev
);
159 int ir_raw_handler_register(struct ir_raw_handler
*ir_raw_handler
);
160 void ir_raw_handler_unregister(struct ir_raw_handler
*ir_raw_handler
);
161 void ir_raw_init(void);
164 * Decoder initialization code
166 * Those load logic are called during ir-core init, and automatically
167 * loads the compiled decoders for their usage with IR raw events
170 /* from ir-lirc-codec.c */
171 #ifdef CONFIG_IR_LIRC_CODEC_MODULE
172 #define load_lirc_codec() request_module_nowait("ir-lirc-codec")
174 static inline void load_lirc_codec(void) { }
177 #endif /* _RC_CORE_PRIV */
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