include/media/ir-common.h

   1 /*
   2  *
   3  * some common structs and functions to handle infrared remotes via
   4  * input layer ...
   5  *
   6  * (c) 2003 Gerd Knorr <kraxel@bytesex.org> [SuSE Labs]
   7  *
   8  *  This program is free software; you can redistribute it and/or modify
   9  *  it under the terms of the GNU General Public License as published by
  10  *  the Free Software Foundation; either version 2 of the License, or
  11  *  (at your option) any later version.
  12  *
  13  *  This program is distributed in the hope that it will be useful,
  14  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  *  GNU General Public License for more details.
  17  *
  18  *  You should have received a copy of the GNU General Public License
  19  *  along with this program; if not, write to the Free Software
  20  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  21  */
  22
  23 #ifndef _IR_COMMON
  24 #define _IR_COMMON
  25
  26 #include <linux/input.h>
  27 #include <linux/workqueue.h>
  28 #include <linux/interrupt.h>
  29 #include <media/ir-core.h>
  30
  31 #define RC5_START(x)    (((x)>>12)&3)
  32 #define RC5_TOGGLE(x)   (((x)>>11)&1)
  33 #define RC5_ADDR(x)     (((x)>>6)&31)
  34 #define RC5_INSTR(x)    ((x)&63)
  35
  36 struct ir_input_state {
  37         /* configuration */
  38         u64      ir_type;
  39
  40         /* key info */
  41         u32                ir_key;      /* ir scancode */
  42         u32                keycode;     /* linux key code */
  43         int                keypressed;  /* current state */
  44 };
  45
  46 /* this was saa7134_ir and bttv_ir, moved here for
  47  * rc5 decoding. */
  48 struct card_ir {
  49         struct input_dev        *dev;
  50         struct ir_input_state   ir;
  51         char                    name[32];
  52         char                    phys[32];
  53         int                     users;
  54
  55         u32                     running:1;
  56         struct ir_dev_props     props;
  57
  58         /* Usual gpio signalling */
  59
  60         u32                     mask_keycode;
  61         u32                     mask_keydown;
  62         u32                     mask_keyup;
  63         u32                     polling;
  64         u32                     last_gpio;
  65         int                     shift_by;
  66         int                     start; // What should RC5_START() be
  67         int                     addr; // What RC5_ADDR() should be.
  68         int                     rc5_key_timeout;
  69         int                     rc5_remote_gap;
  70         struct work_struct      work;
  71         struct timer_list       timer;
  72
  73         /* RC5 gpio */
  74         u32 rc5_gpio;
  75         struct timer_list timer_end;    /* timer_end for code completion */
  76         struct timer_list timer_keyup;  /* timer_end for key release */
  77         u32 last_rc5;                   /* last good rc5 code */
  78         u32 last_bit;                   /* last raw bit seen */
  79         u32 code;                       /* raw code under construction */
  80         struct timeval base_time;       /* time of last seen code */
  81         int active;                     /* building raw code */
  82
  83         /* NEC decoding */
  84         u32                     nec_gpio;
  85         struct tasklet_struct   tlet;
  86
  87         /* IR core raw decoding */
  88         u32                     raw_decode;
  89 };
  90
  91 /* Routines from ir-functions.c */
  92
  93 int ir_input_init(struct input_dev *dev, struct ir_input_state *ir,
  94                    const u64 ir_type);
  95 void ir_input_nokey(struct input_dev *dev, struct ir_input_state *ir);
  96 void ir_input_keydown(struct input_dev *dev, struct ir_input_state *ir,
  97                       u32 ir_key);
  98 u32  ir_extract_bits(u32 data, u32 mask);
  99 int  ir_dump_samples(u32 *samples, int count);
 100 int  ir_decode_biphase(u32 *samples, int count, int low, int high);
 101 int  ir_decode_pulsedistance(u32 *samples, int count, int low, int high);
 102 u32  ir_rc5_decode(unsigned int code);
 103
 104 void ir_rc5_timer_end(unsigned long data);
 105 void ir_rc5_timer_keyup(unsigned long data);
 106
 107 #endif