include/media/ir-common.h

   1 /*
   2  * some common structs and functions to handle infrared remotes via
   3  * input layer ...
   4  *
   5  * (c) 2003 Gerd Knorr <kraxel@bytesex.org> [SuSE Labs]
   6  *
   7  *  This program is free software; you can redistribute it and/or modify
   8  *  it under the terms of the GNU General Public License as published by
   9  *  the Free Software Foundation; either version 2 of the License, or
  10  *  (at your option) any later version.
  11  *
  12  *  This program is distributed in the hope that it will be useful,
  13  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  *  GNU General Public License for more details.
  16  *
  17  *  You should have received a copy of the GNU General Public License
  18  *  along with this program; if not, write to the Free Software
  19  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  20  */
  21
  22 #include <linux/version.h>
  23 #include <linux/input.h>
  24
  25
  26 #define IR_TYPE_RC5     1
  27 #define IR_TYPE_OTHER  99
  28
  29 #define IR_KEYTAB_TYPE  u32
  30 #define IR_KEYTAB_SIZE  128  // enougth for rc5, probably need more some day ...
  31
  32 #define IR_KEYCODE(tab,code)    (((unsigned)code < IR_KEYTAB_SIZE) \
  33                                  ? tab[code] : KEY_RESERVED)
  34
  35 struct ir_input_state {
  36         /* configuration */
  37         int                ir_type;
  38         IR_KEYTAB_TYPE     ir_codes[IR_KEYTAB_SIZE];
  39
  40         /* key info */
  41         u32                ir_raw;      /* raw data */
  42         u32                ir_key;      /* ir key code */
  43         u32                keycode;     /* linux key code */
  44         int                keypressed;  /* current state */
  45 };
  46
  47 extern IR_KEYTAB_TYPE ir_codes_rc5_tv[IR_KEYTAB_SIZE];
  48 extern IR_KEYTAB_TYPE ir_codes_empty[IR_KEYTAB_SIZE];
  49
  50 void ir_input_init(struct input_dev *dev, struct ir_input_state *ir,
  51                    int ir_type, IR_KEYTAB_TYPE *ir_codes);
  52 void ir_input_nokey(struct input_dev *dev, struct ir_input_state *ir);
  53 void ir_input_keydown(struct input_dev *dev, struct ir_input_state *ir,
  54                       u32 ir_key, u32 ir_raw);
  55 u32  ir_extract_bits(u32 data, u32 mask);
  56
  57 /*
  58  * Local variables:
  59  * c-basic-offset: 8
  60  * End:
  61  */