1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
|
/*
* Remote Controller core raw events header
*
* Copyright (C) 2010 by Mauro Carvalho Chehab
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation version 2 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#ifndef _RC_CORE_PRIV
#define _RC_CORE_PRIV
/* Define the max number of pulse/space transitions to buffer */
#define MAX_IR_EVENT_SIZE 512
#include <linux/slab.h>
#include <media/rc-core.h>
struct ir_raw_handler {
struct list_head list;
u64 protocols; /* which are handled by this handler */
int (*decode)(struct rc_dev *dev, struct ir_raw_event event);
int (*encode)(enum rc_proto protocol, u32 scancode,
struct ir_raw_event *events, unsigned int max);
/* These two should only be used by the lirc decoder */
int (*raw_register)(struct rc_dev *dev);
int (*raw_unregister)(struct rc_dev *dev);
};
struct ir_raw_event_ctrl {
struct list_head list; /* to keep track of raw clients */
struct task_struct *thread;
/* fifo for the pulse/space durations */
DECLARE_KFIFO(kfifo, struct ir_raw_event, MAX_IR_EVENT_SIZE);
ktime_t last_event; /* when last event occurred */
struct rc_dev *dev; /* pointer to the parent rc_dev */
/* edge driver */
struct timer_list edge_handle;
/* raw decoder state follows */
struct ir_raw_event prev_ev;
struct ir_raw_event this_ev;
struct nec_dec {
int state;
unsigned count;
u32 bits;
bool is_nec_x;
bool necx_repeat;
} nec;
struct rc5_dec {
int state;
u32 bits;
unsigned count;
bool is_rc5x;
} rc5;
struct rc6_dec {
int state;
u8 header;
u32 body;
bool toggle;
unsigned count;
unsigned wanted_bits;
} rc6;
struct sony_dec {
int state;
u32 bits;
unsigned count;
} sony;
struct jvc_dec {
int state;
u16 bits;
u16 old_bits;
unsigned count;
bool first;
bool toggle;
} jvc;
struct sanyo_dec {
int state;
unsigned count;
u64 bits;
} sanyo;
struct sharp_dec {
int state;
unsigned count;
u32 bits;
unsigned int pulse_len;
} sharp;
struct mce_kbd_dec {
struct input_dev *idev;
struct timer_list rx_timeout;
char name[64];
char phys[64];
int state;
u8 header;
u32 body;
unsigned count;
unsigned wanted_bits;
} mce_kbd;
struct lirc_codec {
struct rc_dev *dev;
struct lirc_dev *ldev;
int carrier_low;
ktime_t gap_start;
u64 gap_duration;
bool gap;
bool send_timeout_reports;
} lirc;
struct xmp_dec {
int state;
unsigned count;
u32 durations[16];
} xmp;
};
/* macros for IR decoders */
static inline bool geq_margin(unsigned d1, unsigned d2, unsigned margin)
{
return d1 > (d2 - margin);
}
static inline bool eq_margin(unsigned d1, unsigned d2, unsigned margin)
{
return ((d1 > (d2 - margin)) && (d1 < (d2 + margin)));
}
static inline bool is_transition(struct ir_raw_event *x, struct ir_raw_event *y)
{
return x->pulse != y->pulse;
}
static inline void decrease_duration(struct ir_raw_event *ev, unsigned duration)
{
if (duration > ev->duration)
ev->duration = 0;
else
ev->duration -= duration;
}
/* Returns true if event is normal pulse/space event */
static inline bool is_timing_event(struct ir_raw_event ev)
{
return !ev.carrier_report && !ev.reset;
}
#define TO_US(duration) DIV_ROUND_CLOSEST((duration), 1000)
#define TO_STR(is_pulse) ((is_pulse) ? "pulse" : "space")
/* functions for IR encoders */
static inline void init_ir_raw_event_duration(struct ir_raw_event *ev,
unsigned int pulse,
u32 duration)
{
init_ir_raw_event(ev);
ev->duration = duration;
ev->pulse = pulse;
}
/**
* struct ir_raw_timings_manchester - Manchester coding timings
* @leader: duration of leader pulse (if any) 0 if continuing
* existing signal (see @pulse_space_start)
* @pulse_space_start: 1 for starting with pulse (0 for starting with space)
* @clock: duration of each pulse/space in ns
* @invert: if set clock logic is inverted
* (0 = space + pulse, 1 = pulse + space)
* @trailer_space: duration of trailer space in ns
*/
struct ir_raw_timings_manchester {
unsigned int leader;
unsigned int pulse_space_start:1;
unsigned int clock;
unsigned int invert:1;
unsigned int trailer_space;
};
int ir_raw_gen_manchester(struct ir_raw_event **ev, unsigned int max,
const struct ir_raw_timings_manchester *timings,
unsigned int n, u64 data);
/**
* ir_raw_gen_pulse_space() - generate pulse and space raw events.
* @ev: Pointer to pointer to next free raw event.
* Will be incremented for each raw event written.
* @max: Pointer to number of raw events available in buffer.
* Will be decremented for each raw event written.
* @pulse_width: Width of pulse in ns.
* @space_width: Width of space in ns.
*
* Returns: 0 on success.
* -ENOBUFS if there isn't enough buffer space to write both raw
* events. In this case @max events will have been written.
*/
static inline int ir_raw_gen_pulse_space(struct ir_raw_event **ev,
unsigned int *max,
unsigned int pulse_width,
unsigned int space_width)
{
if (!*max)
return -ENOBUFS;
init_ir_raw_event_duration((*ev)++, 1, pulse_width);
if (!--*max)
return -ENOBUFS;
init_ir_raw_event_duration((*ev)++, 0, space_width);
--*max;
return 0;
}
/**
* struct ir_raw_timings_pd - pulse-distance modulation timings
* @header_pulse: duration of header pulse in ns (0 for none)
* @header_space: duration of header space in ns
* @bit_pulse: duration of bit pulse in ns
* @bit_space: duration of bit space (for logic 0 and 1) in ns
* @trailer_pulse: duration of trailer pulse in ns
* @trailer_space: duration of trailer space in ns
* @msb_first: 1 if most significant bit is sent first
*/
struct ir_raw_timings_pd {
unsigned int header_pulse;
unsigned int header_space;
unsigned int bit_pulse;
unsigned int bit_space[2];
unsigned int trailer_pulse;
unsigned int trailer_space;
unsigned int msb_first:1;
};
int ir_raw_gen_pd(struct ir_raw_event **ev, unsigned int max,
const struct ir_raw_timings_pd *timings,
unsigned int n, u64 data);
/**
* struct ir_raw_timings_pl - pulse-length modulation timings
* @header_pulse: duration of header pulse in ns (0 for none)
* @bit_space: duration of bit space in ns
* @bit_pulse: duration of bit pulse (for logic 0 and 1) in ns
* @trailer_space: duration of trailer space in ns
* @msb_first: 1 if most significant bit is sent first
*/
struct ir_raw_timings_pl {
unsigned int header_pulse;
unsigned int bit_space;
unsigned int bit_pulse[2];
unsigned int trailer_space;
unsigned int msb_first:1;
};
int ir_raw_gen_pl(struct ir_raw_event **ev, unsigned int max,
const struct ir_raw_timings_pl *timings,
unsigned int n, u64 data);
/*
* Routines from rc-raw.c to be used internally and by decoders
*/
u64 ir_raw_get_allowed_protocols(void);
int ir_raw_event_prepare(struct rc_dev *dev);
int ir_raw_event_register(struct rc_dev *dev);
void ir_raw_event_free(struct rc_dev *dev);
void ir_raw_event_unregister(struct rc_dev *dev);
int ir_raw_handler_register(struct ir_raw_handler *ir_raw_handler);
void ir_raw_handler_unregister(struct ir_raw_handler *ir_raw_handler);
void ir_raw_init(void);
/*
* Decoder initialization code
*
* Those load logic are called during ir-core init, and automatically
* loads the compiled decoders for their usage with IR raw events
*/
#endif /* _RC_CORE_PRIV */
|
