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);
28 int (*encode)(u64 protocols, const struct rc_scancode_filter *scancode,
29 struct ir_raw_event *events, unsigned int max);
31 /* These two should only be used by the lirc decoder */
32 int (*raw_register)(struct rc_dev *dev);
33 int (*raw_unregister)(struct rc_dev *dev);
36 struct ir_raw_event_ctrl {
37 struct list_head list; /* to keep track of raw clients */
38 struct task_struct *thread;
40 struct kfifo_rec_ptr_1 kfifo; /* fifo for the pulse/space durations */
41 ktime_t last_event; /* when last event occurred */
42 enum raw_event_type last_type; /* last event type */
43 struct rc_dev *dev; /* pointer to the parent rc_dev */
45 /* raw decoder state follows */
46 struct ir_raw_event prev_ev;
47 struct ir_raw_event this_ev;
91 unsigned int pulse_len;
94 struct input_dev *idev;
95 struct timer_list rx_timeout;
102 unsigned wanted_bits;
106 struct lirc_driver *drv;
112 bool send_timeout_reports;
122 /* macros for IR decoders */
123 static inline bool geq_margin(unsigned d1, unsigned d2, unsigned margin)
125 return d1 > (d2 - margin);
128 static inline bool eq_margin(unsigned d1, unsigned d2, unsigned margin)
130 return ((d1 > (d2 - margin)) && (d1 < (d2 + margin)));
133 static inline bool is_transition(struct ir_raw_event *x, struct ir_raw_event *y)
135 return x->pulse != y->pulse;
138 static inline void decrease_duration(struct ir_raw_event *ev, unsigned duration)
140 if (duration > ev->duration)
143 ev->duration -= duration;
146 /* Returns true if event is normal pulse/space event */
147 static inline bool is_timing_event(struct ir_raw_event ev)
149 return !ev.carrier_report && !ev.reset;
152 #define TO_US(duration) DIV_ROUND_CLOSEST((duration), 1000)
153 #define TO_STR(is_pulse) ((is_pulse) ? "pulse" : "space")
155 /* functions for IR encoders */
157 static inline void init_ir_raw_event_duration(struct ir_raw_event *ev,
161 init_ir_raw_event(ev);
162 ev->duration = duration;
167 * struct ir_raw_timings_manchester - Manchester coding timings
168 * @leader: duration of leader pulse (if any) 0 if continuing
169 * existing signal (see @pulse_space_start)
170 * @pulse_space_start: 1 for starting with pulse (0 for starting with space)
171 * @clock: duration of each pulse/space in ns
172 * @invert: if set clock logic is inverted
173 * (0 = space + pulse, 1 = pulse + space)
174 * @trailer_space: duration of trailer space in ns
176 struct ir_raw_timings_manchester {
178 unsigned int pulse_space_start:1;
180 unsigned int invert:1;
181 unsigned int trailer_space;
184 int ir_raw_gen_manchester(struct ir_raw_event **ev, unsigned int max,
185 const struct ir_raw_timings_manchester *timings,
186 unsigned int n, unsigned int data);
189 * Routines from rc-raw.c to be used internally and by decoders
191 u64 ir_raw_get_allowed_protocols(void);
192 int ir_raw_event_register(struct rc_dev *dev);
193 void ir_raw_event_unregister(struct rc_dev *dev);
194 int ir_raw_handler_register(struct ir_raw_handler *ir_raw_handler);
195 void ir_raw_handler_unregister(struct ir_raw_handler *ir_raw_handler);
196 void ir_raw_init(void);
199 * Decoder initialization code
201 * Those load logic are called during ir-core init, and automatically
202 * loads the compiled decoders for their usage with IR raw events
205 /* from ir-nec-decoder.c */
206 #ifdef CONFIG_IR_NEC_DECODER_MODULE
207 #define load_nec_decode() request_module_nowait("ir-nec-decoder")
209 static inline void load_nec_decode(void) { }
212 /* from ir-rc5-decoder.c */
213 #ifdef CONFIG_IR_RC5_DECODER_MODULE
214 #define load_rc5_decode() request_module_nowait("ir-rc5-decoder")
216 static inline void load_rc5_decode(void) { }
219 /* from ir-rc6-decoder.c */
220 #ifdef CONFIG_IR_RC6_DECODER_MODULE
221 #define load_rc6_decode() request_module_nowait("ir-rc6-decoder")
223 static inline void load_rc6_decode(void) { }
226 /* from ir-jvc-decoder.c */
227 #ifdef CONFIG_IR_JVC_DECODER_MODULE
228 #define load_jvc_decode() request_module_nowait("ir-jvc-decoder")
230 static inline void load_jvc_decode(void) { }
233 /* from ir-sony-decoder.c */
234 #ifdef CONFIG_IR_SONY_DECODER_MODULE
235 #define load_sony_decode() request_module_nowait("ir-sony-decoder")
237 static inline void load_sony_decode(void) { }
240 /* from ir-sanyo-decoder.c */
241 #ifdef CONFIG_IR_SANYO_DECODER_MODULE
242 #define load_sanyo_decode() request_module_nowait("ir-sanyo-decoder")
244 static inline void load_sanyo_decode(void) { }
247 /* from ir-sharp-decoder.c */
248 #ifdef CONFIG_IR_SHARP_DECODER_MODULE
249 #define load_sharp_decode() request_module_nowait("ir-sharp-decoder")
251 static inline void load_sharp_decode(void) { }
254 /* from ir-mce_kbd-decoder.c */
255 #ifdef CONFIG_IR_MCE_KBD_DECODER_MODULE
256 #define load_mce_kbd_decode() request_module_nowait("ir-mce_kbd-decoder")
258 static inline void load_mce_kbd_decode(void) { }
261 /* from ir-lirc-codec.c */
262 #ifdef CONFIG_IR_LIRC_CODEC_MODULE
263 #define load_lirc_codec() request_module_nowait("ir-lirc-codec")
265 static inline void load_lirc_codec(void) { }
268 /* from ir-xmp-decoder.c */
269 #ifdef CONFIG_IR_XMP_DECODER_MODULE
270 #define load_xmp_decode() request_module_nowait("ir-xmp-decoder")
272 static inline void load_xmp_decode(void) { }
276 #endif /* _RC_CORE_PRIV */