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[~andy/linux] / drivers / media / rc / rc-core-priv.h
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
23 struct 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
34 struct 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
43         /* raw decoder state follows */
44         struct ir_raw_event prev_ev;
45         struct ir_raw_event this_ev;
46         struct nec_dec {
47                 int state;
48                 unsigned count;
49                 u32 bits;
50                 bool is_nec_x;
51                 bool necx_repeat;
52         } nec;
53         struct rc5_dec {
54                 int state;
55                 u32 bits;
56                 unsigned count;
57                 unsigned wanted_bits;
58         } rc5;
59         struct rc6_dec {
60                 int state;
61                 u8 header;
62                 u32 body;
63                 bool toggle;
64                 unsigned count;
65                 unsigned wanted_bits;
66         } rc6;
67         struct sony_dec {
68                 int state;
69                 u32 bits;
70                 unsigned count;
71         } sony;
72         struct jvc_dec {
73                 int state;
74                 u16 bits;
75                 u16 old_bits;
76                 unsigned count;
77                 bool first;
78                 bool toggle;
79         } jvc;
80         struct rc5_sz_dec {
81                 int state;
82                 u32 bits;
83                 unsigned count;
84                 unsigned wanted_bits;
85         } rc5_sz;
86         struct sanyo_dec {
87                 int state;
88                 unsigned count;
89                 u64 bits;
90         } sanyo;
91         struct mce_kbd_dec {
92                 struct input_dev *idev;
93                 struct timer_list rx_timeout;
94                 char name[64];
95                 char phys[64];
96                 int state;
97                 u8 header;
98                 u32 body;
99                 unsigned count;
100                 unsigned wanted_bits;
101         } mce_kbd;
102         struct lirc_codec {
103                 struct rc_dev *dev;
104                 struct lirc_driver *drv;
105                 int carrier_low;
106
107                 ktime_t gap_start;
108                 u64 gap_duration;
109                 bool gap;
110                 bool send_timeout_reports;
111
112         } lirc;
113 };
114
115 /* macros for IR decoders */
116 static inline bool geq_margin(unsigned d1, unsigned d2, unsigned margin)
117 {
118         return d1 > (d2 - margin);
119 }
120
121 static inline bool eq_margin(unsigned d1, unsigned d2, unsigned margin)
122 {
123         return ((d1 > (d2 - margin)) && (d1 < (d2 + margin)));
124 }
125
126 static inline bool is_transition(struct ir_raw_event *x, struct ir_raw_event *y)
127 {
128         return x->pulse != y->pulse;
129 }
130
131 static inline void decrease_duration(struct ir_raw_event *ev, unsigned duration)
132 {
133         if (duration > ev->duration)
134                 ev->duration = 0;
135         else
136                 ev->duration -= duration;
137 }
138
139 /* Returns true if event is normal pulse/space event */
140 static inline bool is_timing_event(struct ir_raw_event ev)
141 {
142         return !ev.carrier_report && !ev.reset;
143 }
144
145 #define TO_US(duration)                 DIV_ROUND_CLOSEST((duration), 1000)
146 #define TO_STR(is_pulse)                ((is_pulse) ? "pulse" : "space")
147
148 /*
149  * Routines from rc-raw.c to be used internally and by decoders
150  */
151 u64 ir_raw_get_allowed_protocols(void);
152 int ir_raw_event_register(struct rc_dev *dev);
153 void ir_raw_event_unregister(struct rc_dev *dev);
154 int ir_raw_handler_register(struct ir_raw_handler *ir_raw_handler);
155 void ir_raw_handler_unregister(struct ir_raw_handler *ir_raw_handler);
156 void ir_raw_init(void);
157
158 /*
159  * Decoder initialization code
160  *
161  * Those load logic are called during ir-core init, and automatically
162  * loads the compiled decoders for their usage with IR raw events
163  */
164
165 /* from ir-nec-decoder.c */
166 #ifdef CONFIG_IR_NEC_DECODER_MODULE
167 #define load_nec_decode()       request_module_nowait("ir-nec-decoder")
168 #else
169 static inline void load_nec_decode(void) { }
170 #endif
171
172 /* from ir-rc5-decoder.c */
173 #ifdef CONFIG_IR_RC5_DECODER_MODULE
174 #define load_rc5_decode()       request_module_nowait("ir-rc5-decoder")
175 #else
176 static inline void load_rc5_decode(void) { }
177 #endif
178
179 /* from ir-rc6-decoder.c */
180 #ifdef CONFIG_IR_RC6_DECODER_MODULE
181 #define load_rc6_decode()       request_module_nowait("ir-rc6-decoder")
182 #else
183 static inline void load_rc6_decode(void) { }
184 #endif
185
186 /* from ir-jvc-decoder.c */
187 #ifdef CONFIG_IR_JVC_DECODER_MODULE
188 #define load_jvc_decode()       request_module_nowait("ir-jvc-decoder")
189 #else
190 static inline void load_jvc_decode(void) { }
191 #endif
192
193 /* from ir-sony-decoder.c */
194 #ifdef CONFIG_IR_SONY_DECODER_MODULE
195 #define load_sony_decode()      request_module_nowait("ir-sony-decoder")
196 #else
197 static inline void load_sony_decode(void) { }
198 #endif
199
200 /* from ir-sanyo-decoder.c */
201 #ifdef CONFIG_IR_SANYO_DECODER_MODULE
202 #define load_sanyo_decode()     request_module_nowait("ir-sanyo-decoder")
203 #else
204 static inline void load_sanyo_decode(void) { }
205 #endif
206
207 /* from ir-mce_kbd-decoder.c */
208 #ifdef CONFIG_IR_MCE_KBD_DECODER_MODULE
209 #define load_mce_kbd_decode()   request_module_nowait("ir-mce_kbd-decoder")
210 #else
211 static inline void load_mce_kbd_decode(void) { }
212 #endif
213
214 /* from ir-lirc-codec.c */
215 #ifdef CONFIG_IR_LIRC_CODEC_MODULE
216 #define load_lirc_codec()       request_module_nowait("ir-lirc-codec")
217 #else
218 static inline void load_lirc_codec(void) { }
219 #endif
220
221
222 #endif /* _RC_CORE_PRIV */