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 #include <linux/input.h>
  24
  25
  26 #define IR_TYPE_RC5     1
  27 #define IR_TYPE_PD      2 /* Pulse distance encoded IR */
  28 #define IR_TYPE_OTHER  99
  29
  30 #define IR_KEYTAB_TYPE  u32
  31 #define IR_KEYTAB_SIZE  128  // enougth for rc5, probably need more some day ...
  32
  33 #define IR_KEYCODE(tab,code)    (((unsigned)code < IR_KEYTAB_SIZE) \
  34                                  ? tab[code] : KEY_RESERVED)
  35
  36 struct ir_input_state {
  37         /* configuration */
  38         int                ir_type;
  39         IR_KEYTAB_TYPE     ir_codes[IR_KEYTAB_SIZE];
  40
  41         /* key info */
  42         u32                ir_raw;      /* raw data */
  43         u32                ir_key;      /* ir key code */
  44         u32                keycode;     /* linux key code */
  45         int                keypressed;  /* current state */
  46 };
  47
  48 extern IR_KEYTAB_TYPE ir_codes_rc5_tv[IR_KEYTAB_SIZE];
  49 extern IR_KEYTAB_TYPE ir_codes_winfast[IR_KEYTAB_SIZE];
  50 extern IR_KEYTAB_TYPE ir_codes_empty[IR_KEYTAB_SIZE];
  51 extern IR_KEYTAB_TYPE ir_codes_hauppauge_new[IR_KEYTAB_SIZE];
  52 extern IR_KEYTAB_TYPE ir_codes_pixelview[IR_KEYTAB_SIZE];
  53
  54 void ir_input_init(struct input_dev *dev, struct ir_input_state *ir,
  55                    int ir_type, IR_KEYTAB_TYPE *ir_codes);
  56 void ir_input_nokey(struct input_dev *dev, struct ir_input_state *ir);
  57 void ir_input_keydown(struct input_dev *dev, struct ir_input_state *ir,
  58                       u32 ir_key, u32 ir_raw);
  59 u32  ir_extract_bits(u32 data, u32 mask);
  60 int  ir_dump_samples(u32 *samples, int count);
  61 int  ir_decode_biphase(u32 *samples, int count, int low, int high);
  62 int  ir_decode_pulsedistance(u32 *samples, int count, int low, int high);
  63
  64 /*
  65  * Local variables:
  66  * c-basic-offset: 8
  67  * End:
  68  */