1 /*
2 * Remote Controller core raw events header
3 *
4 * Copyright (C) 2010 by Mauro Carvalho Chehab
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 /* Define the max number of pulse/space transitions to buffer */
20 #define MAX_IR_EVENT_SIZE 512
21
22 #include <linux/slab.h>
23 #include <linux/spinlock.h>
24 #include <media/rc-core.h>
25
26 struct ir_raw_handler {
27 struct list_head list;
28
29 u64 protocols; /* which are handled by this handler */
30 int (*decode)(struct rc_dev *dev, struct ir_raw_event event);
31
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);
35 };
36
37 struct ir_raw_event_ctrl {
38 struct list_head list; /* to keep track of raw clients */
39 struct task_struct *thread;
40 spinlock_t lock;
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 */
46
47 /* raw decoder state follows */
48 struct ir_raw_event prev_ev;
49 struct ir_raw_event this_ev;
50 struct nec_dec {
51 int state;
52 unsigned count;
53 u32 bits;
54 bool is_nec_x;
55 bool necx_repeat;
56 } nec;
57 struct rc5_dec {
58 int state;
59 u32 bits;
60 unsigned count;
61 bool is_rc5x;
62 } rc5;
63 struct rc6_dec {
64 int state;
65 u8 header;
66 u32 body;
67 bool toggle;
68 unsigned count;
69 unsigned wanted_bits;
70 } rc6;
71 struct sony_dec {
72 int state;
73 u32 bits;
74 unsigned count;
75 } sony;
76 struct jvc_dec {
77 int state;
78 u16 bits;
79 u16 old_bits;
80 unsigned count;
81 bool first;
82 bool toggle;
83 } jvc;
84 struct sanyo_dec {
85 int state;
86 unsigned count;
87 u64 bits;
88 } sanyo;
89 struct sharp_dec {
90 int state;
91 unsigned count;
92 u32 bits;
93 unsigned int pulse_len;
94 } sharp;
95 struct mce_kbd_dec {
96 struct input_dev *idev;
97 struct timer_list rx_timeout;
98 char name[64];
99 char phys[64];
100 int state;
101 u8 header;
102 u32 body;
103 unsigned count;
104 unsigned wanted_bits;
105 } mce_kbd;
106 struct lirc_codec {
107 struct rc_dev *dev;
108 struct lirc_driver *drv;
109 int carrier_low;
110
111 ktime_t gap_start;
112 u64 gap_duration;
113 bool gap;
114 bool send_timeout_reports;
115
116 } lirc;
117 struct xmp_dec {
118 int state;
119 unsigned count;
120 u32 durations[16];
121 } xmp;
122 };
123
124 /* macros for IR decoders */
geq_margin(unsigned d1,unsigned d2,unsigned margin)125 static inline bool geq_margin(unsigned d1, unsigned d2, unsigned margin)
126 {
127 return d1 > (d2 - margin);
128 }
129
eq_margin(unsigned d1,unsigned d2,unsigned margin)130 static inline bool eq_margin(unsigned d1, unsigned d2, unsigned margin)
131 {
132 return ((d1 > (d2 - margin)) && (d1 < (d2 + margin)));
133 }
134
is_transition(struct ir_raw_event * x,struct ir_raw_event * y)135 static inline bool is_transition(struct ir_raw_event *x, struct ir_raw_event *y)
136 {
137 return x->pulse != y->pulse;
138 }
139
decrease_duration(struct ir_raw_event * ev,unsigned duration)140 static inline void decrease_duration(struct ir_raw_event *ev, unsigned duration)
141 {
142 if (duration > ev->duration)
143 ev->duration = 0;
144 else
145 ev->duration -= duration;
146 }
147
148 /* Returns true if event is normal pulse/space event */
is_timing_event(struct ir_raw_event ev)149 static inline bool is_timing_event(struct ir_raw_event ev)
150 {
151 return !ev.carrier_report && !ev.reset;
152 }
153
154 #define TO_US(duration) DIV_ROUND_CLOSEST((duration), 1000)
155 #define TO_STR(is_pulse) ((is_pulse) ? "pulse" : "space")
156
157 /*
158 * Routines from rc-raw.c to be used internally and by decoders
159 */
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);
166
167 /*
168 * Decoder initialization code
169 *
170 * Those load logic are called during ir-core init, and automatically
171 * loads the compiled decoders for their usage with IR raw events
172 */
173
174 #endif /* _RC_CORE_PRIV */
175