packaging: release out (3.8.3)
[profile/ivi/kernel-adaptation-intel-automotive.git] / 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         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 */
117 static inline bool geq_margin(unsigned d1, unsigned d2, unsigned margin)
118 {
119         return d1 > (d2 - margin);
120 }
121
122 static inline bool eq_margin(unsigned d1, unsigned d2, unsigned margin)
123 {
124         return ((d1 > (d2 - margin)) && (d1 < (d2 + margin)));
125 }
126
127 static inline bool is_transition(struct ir_raw_event *x, struct ir_raw_event *y)
128 {
129         return x->pulse != y->pulse;
130 }
131
132 static 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 */
141 static 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  */
152 u64 ir_raw_get_allowed_protocols(void);
153 int ir_raw_event_register(struct rc_dev *dev);
154 void ir_raw_event_unregister(struct rc_dev *dev);
155 int ir_raw_handler_register(struct ir_raw_handler *ir_raw_handler);
156 void ir_raw_handler_unregister(struct ir_raw_handler *ir_raw_handler);
157 void 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
170 static 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
177 static 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
184 static 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
191 static 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
198 static 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
205 static 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
212 static 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
219 static inline void load_lirc_codec(void) { }
220 #endif
221
222
223 #endif /* _RC_CORE_PRIV */