drivers/media/rc/rc-core-priv.h

   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 #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                 bool is_rc5x;
  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 sanyo_dec {
  81                 int state;
  82                 unsigned count;
  83                 u64 bits;
  84         } sanyo;
  85         struct sharp_dec {
  86                 int state;
  87                 unsigned count;
  88                 u32 bits;
  89                 unsigned int pulse_len;
  90         } sharp;
  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         struct xmp_dec {
 114                 int state;
 115                 unsigned count;
 116                 u32 durations[16];
 117         } xmp;
 118 };
 119
 120 /* macros for IR decoders */
 121 static inline bool geq_margin(unsigned d1, unsigned d2, unsigned margin)
 122 {
 123         return d1 > (d2 - margin);
 124 }
 125
 126 static inline bool eq_margin(unsigned d1, unsigned d2, unsigned margin)
 127 {
 128         return ((d1 > (d2 - margin)) && (d1 < (d2 + margin)));
 129 }
 130
 131 static inline bool is_transition(struct ir_raw_event *x, struct ir_raw_event *y)
 132 {
 133         return x->pulse != y->pulse;
 134 }
 135
 136 static inline void decrease_duration(struct ir_raw_event *ev, unsigned duration)
 137 {
 138         if (duration > ev->duration)
 139                 ev->duration = 0;
 140         else
 141                 ev->duration -= duration;
 142 }
 143
 144 /* Returns true if event is normal pulse/space event */
 145 static inline bool is_timing_event(struct ir_raw_event ev)
 146 {
 147         return !ev.carrier_report && !ev.reset;
 148 }
 149
 150 #define TO_US(duration)                 DIV_ROUND_CLOSEST((duration), 1000)
 151 #define TO_STR(is_pulse)                ((is_pulse) ? "pulse" : "space")
 152
 153 /*
 154  * Routines from rc-raw.c to be used internally and by decoders
 155  */
 156 u64 ir_raw_get_allowed_protocols(void);
 157 int ir_raw_event_register(struct rc_dev *dev);
 158 void ir_raw_event_unregister(struct rc_dev *dev);
 159 int ir_raw_handler_register(struct ir_raw_handler *ir_raw_handler);
 160 void ir_raw_handler_unregister(struct ir_raw_handler *ir_raw_handler);
 161 void ir_raw_init(void);
 162
 163 /*
 164  * Decoder initialization code
 165  *
 166  * Those load logic are called during ir-core init, and automatically
 167  * loads the compiled decoders for their usage with IR raw events
 168  */
 169
 170 #endif /* _RC_CORE_PRIV */