tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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linux
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 _RC_CORE_PRIV
17#define _RC_CORE_PRIV
18
19#include <linux/slab.h>
20#include <linux/spinlock.h>
21#include <media/rc-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 rc_dev *dev, struct ir_raw_event event);
28
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);
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_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 */
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 sanyo_dec {
88 int state;
89 unsigned count;
90 u64 bits;
91 } sanyo;
92 struct mce_kbd_dec {
93 struct input_dev *idev;
94 struct timer_list rx_timeout;
95 char name[64];
96 char phys[64];
97 int state;
98 u8 header;
99 u32 body;
100 unsigned count;
101 unsigned wanted_bits;
102 } mce_kbd;
103 struct lirc_codec {
104 struct rc_dev *dev;
105 struct lirc_driver *drv;
106 int carrier_low;
107
108 ktime_t gap_start;
109 u64 gap_duration;
110 bool gap;
111 bool send_timeout_reports;
112
113 } lirc;
114};
115
116/* macros for IR decoders */
117static inline bool geq_margin(unsigned d1, unsigned d2, unsigned margin)
118{
119 return d1 > (d2 - margin);
120}
121
122static inline bool eq_margin(unsigned d1, unsigned d2, unsigned margin)
123{
124 return ((d1 > (d2 - margin)) && (d1 < (d2 + margin)));
125}
126
127static inline bool is_transition(struct ir_raw_event *x, struct ir_raw_event *y)
128{
129 return x->pulse != y->pulse;
130}
131
132static inline void decrease_duration(struct ir_raw_event *ev, unsigned duration)
133{
134 if (duration > ev->duration)
135 ev->duration = 0;
136 else
137 ev->duration -= duration;
138}
139
140/* Returns true if event is normal pulse/space event */
141static inline bool is_timing_event(struct ir_raw_event ev)
142{
143 return !ev.carrier_report && !ev.reset;
144}
145
146#define TO_US(duration) DIV_ROUND_CLOSEST((duration), 1000)
147#define TO_STR(is_pulse) ((is_pulse) ? "pulse" : "space")
148
149/*
150 * Routines from rc-raw.c to be used internally and by decoders
151 */
152u64 ir_raw_get_allowed_protocols(void);
153int ir_raw_event_register(struct rc_dev *dev);
154void ir_raw_event_unregister(struct rc_dev *dev);
155int ir_raw_handler_register(struct ir_raw_handler *ir_raw_handler);
156void ir_raw_handler_unregister(struct ir_raw_handler *ir_raw_handler);
157void ir_raw_init(void);
158
159/*
160 * Decoder initialization code
161 *
162 * Those load logic are called during ir-core init, and automatically
163 * loads the compiled decoders for their usage with IR raw events
164 */
165
166/* from ir-nec-decoder.c */
167#ifdef CONFIG_IR_NEC_DECODER_MODULE
168#define load_nec_decode() request_module("ir-nec-decoder")
169#else
170static inline void load_nec_decode(void) { }
171#endif
172
173/* from ir-rc5-decoder.c */
174#ifdef CONFIG_IR_RC5_DECODER_MODULE
175#define load_rc5_decode() request_module("ir-rc5-decoder")
176#else
177static inline void load_rc5_decode(void) { }
178#endif
179
180/* from ir-rc6-decoder.c */
181#ifdef CONFIG_IR_RC6_DECODER_MODULE
182#define load_rc6_decode() request_module("ir-rc6-decoder")
183#else
184static inline void load_rc6_decode(void) { }
185#endif
186
187/* from ir-jvc-decoder.c */
188#ifdef CONFIG_IR_JVC_DECODER_MODULE
189#define load_jvc_decode() request_module("ir-jvc-decoder")
190#else
191static inline void load_jvc_decode(void) { }
192#endif
193
194/* from ir-sony-decoder.c */
195#ifdef CONFIG_IR_SONY_DECODER_MODULE
196#define load_sony_decode() request_module("ir-sony-decoder")
197#else
198static inline void load_sony_decode(void) { }
199#endif
200
201/* from ir-sanyo-decoder.c */
202#ifdef CONFIG_IR_SANYO_DECODER_MODULE
203#define load_sanyo_decode() request_module("ir-sanyo-decoder")
204#else
205static inline void load_sanyo_decode(void) { }
206#endif
207
208/* from ir-mce_kbd-decoder.c */
209#ifdef CONFIG_IR_MCE_KBD_DECODER_MODULE
210#define load_mce_kbd_decode() request_module("ir-mce_kbd-decoder")
211#else
212static inline void load_mce_kbd_decode(void) { }
213#endif
214
215/* from ir-lirc-codec.c */
216#ifdef CONFIG_IR_LIRC_CODEC_MODULE
217#define load_lirc_codec() request_module("ir-lirc-codec")
218#else
219static inline void load_lirc_codec(void) { }
220#endif
221
222
223#endif /* _RC_CORE_PRIV */