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         int (*decode)(struct input_dev *input_dev, struct ir_raw_event event);
  26         int (*raw_register)(struct input_dev *input_dev);
  27         int (*raw_unregister)(struct input_dev *input_dev);
  28 };
  29
  30 struct ir_raw_event_ctrl {
  31         struct work_struct              rx_work;        /* for the rx decoding workqueue */
  32         struct kfifo                    kfifo;          /* fifo for the pulse/space durations */
  33         ktime_t                         last_event;     /* when last event occurred */
  34         enum raw_event_type             last_type;      /* last event type */
  35         struct input_dev                *input_dev;     /* pointer to the parent input_dev */
  36 };
  37
  38 /* macros for IR decoders */
  39 static inline bool geq_margin(unsigned d1, unsigned d2, unsigned margin)
  40 {
  41         return d1 > (d2 - margin);
  42 }
  43
  44 static inline bool eq_margin(unsigned d1, unsigned d2, unsigned margin)
  45 {
  46         return ((d1 > (d2 - margin)) && (d1 < (d2 + margin)));
  47 }
  48
  49 static inline bool is_transition(struct ir_raw_event *x, struct ir_raw_event *y)
  50 {
  51         return x->pulse != y->pulse;
  52 }
  53
  54 static inline void decrease_duration(struct ir_raw_event *ev, unsigned duration)
  55 {
  56         if (duration > ev->duration)
  57                 ev->duration = 0;
  58         else
  59                 ev->duration -= duration;
  60 }
  61
  62 #define TO_US(duration)                 (((duration) + 500) / 1000)
  63 #define TO_STR(is_pulse)                ((is_pulse) ? "pulse" : "space")
  64 #define IS_RESET(ev)                    (ev.duration == 0)
  65
  66 /*
  67  * Routines from ir-sysfs.c - Meant to be called only internally inside
  68  * ir-core
  69  */
  70
  71 int ir_register_class(struct input_dev *input_dev);
  72 void ir_unregister_class(struct input_dev *input_dev);
  73
  74 /*
  75  * Routines from ir-raw-event.c to be used internally and by decoders
  76  */
  77 int ir_raw_event_register(struct input_dev *input_dev);
  78 void ir_raw_event_unregister(struct input_dev *input_dev);
  79 int ir_raw_handler_register(struct ir_raw_handler *ir_raw_handler);
  80 void ir_raw_handler_unregister(struct ir_raw_handler *ir_raw_handler);
  81 void ir_raw_init(void);
  82
  83
  84 /*
  85  * Decoder initialization code
  86  *
  87  * Those load logic are called during ir-core init, and automatically
  88  * loads the compiled decoders for their usage with IR raw events
  89  */
  90
  91 /* from ir-nec-decoder.c */
  92 #ifdef CONFIG_IR_NEC_DECODER_MODULE
  93 #define load_nec_decode()       request_module("ir-nec-decoder")
  94 #else
  95 #define load_nec_decode()       0
  96 #endif
  97
  98 /* from ir-rc5-decoder.c */
  99 #ifdef CONFIG_IR_RC5_DECODER_MODULE
 100 #define load_rc5_decode()       request_module("ir-rc5-decoder")
 101 #else
 102 #define load_rc5_decode()       0
 103 #endif
 104
 105 /* from ir-rc6-decoder.c */
 106 #ifdef CONFIG_IR_RC6_DECODER_MODULE
 107 #define load_rc6_decode()       request_module("ir-rc6-decoder")
 108 #else
 109 #define load_rc6_decode()       0
 110 #endif
 111
 112 /* from ir-jvc-decoder.c */
 113 #ifdef CONFIG_IR_JVC_DECODER_MODULE
 114 #define load_jvc_decode()       request_module("ir-jvc-decoder")
 115 #else
 116 #define load_jvc_decode()       0
 117 #endif
 118
 119 /* from ir-sony-decoder.c */
 120 #ifdef CONFIG_IR_SONY_DECODER_MODULE
 121 #define load_sony_decode()      request_module("ir-sony-decoder")
 122 #else
 123 #define load_sony_decode()      0
 124 #endif
 125
 126 #endif /* _IR_RAW_EVENT */