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 /* Define the max number of pulse/space transitions to buffer */
20 #define MAX_IR_EVENT_SIZE 512
22 #include <linux/slab.h>
23 #include <linux/spinlock.h>
24 #include <media/rc-core.h>
26 struct ir_raw_handler {
27 struct list_head list;
29 u64 protocols; /* which are handled by this handler */
30 int (*decode)(struct rc_dev *dev, struct ir_raw_event event);
32 /* These two should only be used by the lirc decoder */
33 int (*raw_register)(struct rc_dev *dev);
34 int (*raw_unregister)(struct rc_dev *dev);
37 struct ir_raw_event_ctrl {
38 struct list_head list; /* to keep track of raw clients */
39 struct task_struct *thread;
41 /* fifo for the pulse/space durations */
42 DECLARE_KFIFO(kfifo, struct ir_raw_event, MAX_IR_EVENT_SIZE);
43 ktime_t last_event; /* when last event occurred */
44 enum raw_event_type last_type; /* last event type */
45 struct rc_dev *dev; /* pointer to the parent rc_dev */
47 /* raw decoder state follows */
48 struct ir_raw_event prev_ev;
49 struct ir_raw_event this_ev;
93 unsigned int pulse_len;
96 struct input_dev *idev;
97 struct timer_list rx_timeout;
104 unsigned wanted_bits;
108 struct lirc_driver *drv;
114 bool send_timeout_reports;
124 /* macros for IR decoders */
125 static inline bool geq_margin(unsigned d1, unsigned d2, unsigned margin)
127 return d1 > (d2 - margin);
130 static inline bool eq_margin(unsigned d1, unsigned d2, unsigned margin)
132 return ((d1 > (d2 - margin)) && (d1 < (d2 + margin)));
135 static inline bool is_transition(struct ir_raw_event *x, struct ir_raw_event *y)
137 return x->pulse != y->pulse;
140 static inline void decrease_duration(struct ir_raw_event *ev, unsigned duration)
142 if (duration > ev->duration)
145 ev->duration -= duration;
148 /* Returns true if event is normal pulse/space event */
149 static inline bool is_timing_event(struct ir_raw_event ev)
151 return !ev.carrier_report && !ev.reset;
154 #define TO_US(duration) DIV_ROUND_CLOSEST((duration), 1000)
155 #define TO_STR(is_pulse) ((is_pulse) ? "pulse" : "space")
158 * Routines from rc-raw.c to be used internally and by decoders
160 u64 ir_raw_get_allowed_protocols(void);
161 int ir_raw_event_register(struct rc_dev *dev);
162 void ir_raw_event_unregister(struct rc_dev *dev);
163 int ir_raw_handler_register(struct ir_raw_handler *ir_raw_handler);
164 void ir_raw_handler_unregister(struct ir_raw_handler *ir_raw_handler);
165 void ir_raw_init(void);
168 * Decoder initialization code
170 * Those load logic are called during ir-core init, and automatically
171 * loads the compiled decoders for their usage with IR raw events
174 #endif /* _RC_CORE_PRIV */