release/src-rt-6.x.4708/linux/linux-2.6.36/drivers/media/IR/ir-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 _IR_RAW_EVENT
  17 #define _IR_RAW_EVENT
  18
  19 #include <linux/slab.h>
  20 #include <media/ir-core.h>
  21
  22 struct ir_raw_handler {
  23         struct list_head list;
  24
  25         u64 protocols; /* which are handled by this handler */
  26         int (*decode)(struct input_dev *input_dev, struct ir_raw_event event);
  27
  28         /* These two should only be used by the lirc decoder */
  29         int (*raw_register)(struct input_dev *input_dev);
  30         int (*raw_unregister)(struct input_dev *input_dev);
  31 };
  32
  33 struct ir_raw_event_ctrl {
  34         struct list_head                list;           /* to keep track of raw clients */
  35         struct task_struct              *thread;
  36         struct kfifo                    kfifo;          /* fifo for the pulse/space durations */
  37         ktime_t                         last_event;     /* when last event occurred */
  38         enum raw_event_type             last_type;      /* last event type */
  39         struct input_dev                *input_dev;     /* pointer to the parent input_dev */
  40         u64                             enabled_protocols; /* enabled raw protocol decoders */
  41
  42         /* raw decoder state follows */
  43         struct ir_raw_event prev_ev;
  44         struct ir_raw_event this_ev;
  45         struct nec_dec {
  46                 int state;
  47                 unsigned count;
  48                 u32 bits;
  49                 bool is_nec_x;
  50                 bool necx_repeat;
  51         } nec;
  52         struct rc5_dec {
  53                 int state;
  54                 u32 bits;
  55                 unsigned count;
  56                 unsigned wanted_bits;
  57         } rc5;
  58         struct rc6_dec {
  59                 int state;
  60                 u8 header;
  61                 u32 body;
  62                 bool toggle;
  63                 unsigned count;
  64                 unsigned wanted_bits;
  65         } rc6;
  66         struct sony_dec {
  67                 int state;
  68                 u32 bits;
  69                 unsigned count;
  70         } sony;
  71         struct jvc_dec {
  72                 int state;
  73                 u16 bits;
  74                 u16 old_bits;
  75                 unsigned count;
  76                 bool first;
  77                 bool toggle;
  78         } jvc;
  79         struct lirc_codec {
  80                 struct ir_input_dev *ir_dev;
  81                 struct lirc_driver *drv;
  82                 int carrier_low;
  83         } lirc;
  84 };
  85
  86 /* macros for IR decoders */
  87 static inline bool geq_margin(unsigned d1, unsigned d2, unsigned margin)
  88 {
  89         return d1 > (d2 - margin);
  90 }
  91
  92 static inline bool eq_margin(unsigned d1, unsigned d2, unsigned margin)
  93 {
  94         return ((d1 > (d2 - margin)) && (d1 < (d2 + margin)));
  95 }
  96
  97 static inline bool is_transition(struct ir_raw_event *x, struct ir_raw_event *y)
  98 {
  99         return x->pulse != y->pulse;
 100 }
 101
 102 static inline void decrease_duration(struct ir_raw_event *ev, unsigned duration)
 103 {
 104         if (duration > ev->duration)
 105                 ev->duration = 0;
 106         else
 107                 ev->duration -= duration;
 108 }
 109
 110 #define TO_US(duration)                 DIV_ROUND_CLOSEST((duration), 1000)
 111 #define TO_STR(is_pulse)                ((is_pulse) ? "pulse" : "space")
 112 #define IS_RESET(ev)                    (ev.duration == 0)
 113 /*
 114  * Routines from ir-sysfs.c - Meant to be called only internally inside
 115  * ir-core
 116  */
 117
 118 int ir_register_class(struct input_dev *input_dev);
 119 void ir_unregister_class(struct input_dev *input_dev);
 120
 121 /*
 122  * Routines from ir-raw-event.c to be used internally and by decoders
 123  */
 124 u64 ir_raw_get_allowed_protocols(void);
 125 int ir_raw_event_register(struct input_dev *input_dev);
 126 void ir_raw_event_unregister(struct input_dev *input_dev);
 127 int ir_raw_handler_register(struct ir_raw_handler *ir_raw_handler);
 128 void ir_raw_handler_unregister(struct ir_raw_handler *ir_raw_handler);
 129 void ir_raw_init(void);
 130
 131 int ir_rcmap_init(void);
 132 void ir_rcmap_cleanup(void);
 133 /*
 134  * Decoder initialization code
 135  *
 136  * Those load logic are called during ir-core init, and automatically
 137  * loads the compiled decoders for their usage with IR raw events
 138  */
 139
 140 /* from ir-nec-decoder.c */
 141 #ifdef CONFIG_IR_NEC_DECODER_MODULE
 142 #define load_nec_decode()       request_module("ir-nec-decoder")
 143 #else
 144 #define load_nec_decode()       0
 145 #endif
 146
 147 /* from ir-rc5-decoder.c */
 148 #ifdef CONFIG_IR_RC5_DECODER_MODULE
 149 #define load_rc5_decode()       request_module("ir-rc5-decoder")
 150 #else
 151 #define load_rc5_decode()       0
 152 #endif
 153
 154 /* from ir-rc6-decoder.c */
 155 #ifdef CONFIG_IR_RC6_DECODER_MODULE
 156 #define load_rc6_decode()       request_module("ir-rc6-decoder")
 157 #else
 158 #define load_rc6_decode()       0
 159 #endif
 160
 161 /* from ir-jvc-decoder.c */
 162 #ifdef CONFIG_IR_JVC_DECODER_MODULE
 163 #define load_jvc_decode()       request_module("ir-jvc-decoder")
 164 #else
 165 #define load_jvc_decode()       0
 166 #endif
 167
 168 /* from ir-sony-decoder.c */
 169 #ifdef CONFIG_IR_SONY_DECODER_MODULE
 170 #define load_sony_decode()      request_module("ir-sony-decoder")
 171 #else
 172 #define load_sony_decode()      0
 173 #endif
 174
 175 /* from ir-lirc-codec.c */
 176 #ifdef CONFIG_IR_LIRC_CODEC_MODULE
 177 #define load_lirc_codec()       request_module("ir-lirc-codec")
 178 #else
 179 #define load_lirc_codec()       0
 180 #endif
 181
 182
 183 #endif /* _IR_RAW_EVENT */