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-rw-r--r--drivers/media/rc/ir-core-priv.h203
1 files changed, 203 insertions, 0 deletions
diff --git a/drivers/media/rc/ir-core-priv.h b/drivers/media/rc/ir-core-priv.h
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+++ b/drivers/media/rc/ir-core-priv.h
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1/*
2 * Remote Controller core raw events header
3 *
4 * Copyright (C) 2010 by Mauro Carvalho Chehab <mchehab@redhat.com>
5 *
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.
9 *
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.
14 */
15
16#ifndef _IR_RAW_EVENT
17#define _IR_RAW_EVENT
18
19#include <linux/slab.h>
20#include <linux/spinlock.h>
21#include <media/ir-core.h>
22
23struct ir_raw_handler {
24 struct list_head list;
25
26 u64 protocols; /* which are handled by this handler */
27 int (*decode)(struct input_dev *input_dev, struct ir_raw_event event);
28
29 /* These two should only be used by the lirc decoder */
30 int (*raw_register)(struct input_dev *input_dev);
31 int (*raw_unregister)(struct input_dev *input_dev);
32};
33
34struct ir_raw_event_ctrl {
35 struct list_head list; /* to keep track of raw clients */
36 struct task_struct *thread;
37 spinlock_t lock;
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 input_dev *input_dev; /* pointer to the parent input_dev */
42 u64 enabled_protocols; /* enabled raw protocol decoders */
43
44 /* raw decoder state follows */
45 struct ir_raw_event prev_ev;
46 struct ir_raw_event this_ev;
47 struct nec_dec {
48 int state;
49 unsigned count;
50 u32 bits;
51 bool is_nec_x;
52 bool necx_repeat;
53 } nec;
54 struct rc5_dec {
55 int state;
56 u32 bits;
57 unsigned count;
58 unsigned wanted_bits;
59 } rc5;
60 struct rc6_dec {
61 int state;
62 u8 header;
63 u32 body;
64 bool toggle;
65 unsigned count;
66 unsigned wanted_bits;
67 } rc6;
68 struct sony_dec {
69 int state;
70 u32 bits;
71 unsigned count;
72 } sony;
73 struct jvc_dec {
74 int state;
75 u16 bits;
76 u16 old_bits;
77 unsigned count;
78 bool first;
79 bool toggle;
80 } jvc;
81 struct rc5_sz_dec {
82 int state;
83 u32 bits;
84 unsigned count;
85 unsigned wanted_bits;
86 } rc5_sz;
87 struct lirc_codec {
88 struct ir_input_dev *ir_dev;
89 struct lirc_driver *drv;
90 int carrier_low;
91
92 ktime_t gap_start;
93 u64 gap_duration;
94 bool gap;
95 bool send_timeout_reports;
96
97 } lirc;
98};
99
100/* macros for IR decoders */
101static inline bool geq_margin(unsigned d1, unsigned d2, unsigned margin)
102{
103 return d1 > (d2 - margin);
104}
105
106static inline bool eq_margin(unsigned d1, unsigned d2, unsigned margin)
107{
108 return ((d1 > (d2 - margin)) && (d1 < (d2 + margin)));
109}
110
111static inline bool is_transition(struct ir_raw_event *x, struct ir_raw_event *y)
112{
113 return x->pulse != y->pulse;
114}
115
116static inline void decrease_duration(struct ir_raw_event *ev, unsigned duration)
117{
118 if (duration > ev->duration)
119 ev->duration = 0;
120 else
121 ev->duration -= duration;
122}
123
124/* Returns true if event is normal pulse/space event */
125static inline bool is_timing_event(struct ir_raw_event ev)
126{
127 return !ev.carrier_report && !ev.reset;
128}
129
130#define TO_US(duration) DIV_ROUND_CLOSEST((duration), 1000)
131#define TO_STR(is_pulse) ((is_pulse) ? "pulse" : "space")
132/*
133 * Routines from ir-sysfs.c - Meant to be called only internally inside
134 * ir-core
135 */
136int ir_register_input(struct input_dev *input_dev);
137
138int ir_register_class(struct input_dev *input_dev);
139void ir_unregister_class(struct input_dev *input_dev);
140
141/*
142 * Routines from ir-raw-event.c to be used internally and by decoders
143 */
144u64 ir_raw_get_allowed_protocols(void);
145int ir_raw_event_register(struct input_dev *input_dev);
146void ir_raw_event_unregister(struct input_dev *input_dev);
147int ir_raw_handler_register(struct ir_raw_handler *ir_raw_handler);
148void ir_raw_handler_unregister(struct ir_raw_handler *ir_raw_handler);
149void ir_raw_init(void);
150
151int ir_rcmap_init(void);
152void ir_rcmap_cleanup(void);
153/*
154 * Decoder initialization code
155 *
156 * Those load logic are called during ir-core init, and automatically
157 * loads the compiled decoders for their usage with IR raw events
158 */
159
160/* from ir-nec-decoder.c */
161#ifdef CONFIG_IR_NEC_DECODER_MODULE
162#define load_nec_decode() request_module("ir-nec-decoder")
163#else
164#define load_nec_decode() 0
165#endif
166
167/* from ir-rc5-decoder.c */
168#ifdef CONFIG_IR_RC5_DECODER_MODULE
169#define load_rc5_decode() request_module("ir-rc5-decoder")
170#else
171#define load_rc5_decode() 0
172#endif
173
174/* from ir-rc6-decoder.c */
175#ifdef CONFIG_IR_RC6_DECODER_MODULE
176#define load_rc6_decode() request_module("ir-rc6-decoder")
177#else
178#define load_rc6_decode() 0
179#endif
180
181/* from ir-jvc-decoder.c */
182#ifdef CONFIG_IR_JVC_DECODER_MODULE
183#define load_jvc_decode() request_module("ir-jvc-decoder")
184#else
185#define load_jvc_decode() 0
186#endif
187
188/* from ir-sony-decoder.c */
189#ifdef CONFIG_IR_SONY_DECODER_MODULE
190#define load_sony_decode() request_module("ir-sony-decoder")
191#else
192#define load_sony_decode() 0
193#endif
194
195/* from ir-lirc-codec.c */
196#ifdef CONFIG_IR_LIRC_CODEC_MODULE
197#define load_lirc_codec() request_module("ir-lirc-codec")
198#else
199#define load_lirc_codec() 0
200#endif
201
202
203#endif /* _IR_RAW_EVENT */
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