drivers/media/common/ir-common.c

   1 /*
   2  * $Id: ir-common.c,v 1.8 2005/02/22 12:28:40 kraxel Exp $
   3  *
   4  * some common structs and functions to handle infrared remotes via
   5  * input layer ...
   6  *
   7  * (c) 2003 Gerd Knorr <kraxel@bytesex.org> [SuSE Labs]
   8  *
   9  *  This program is free software; you can redistribute it and/or modify
  10  *  it under the terms of the GNU General Public License as published by
  11  *  the Free Software Foundation; either version 2 of the License, or
  12  *  (at your option) any later version.
  13  *
  14  *  This program is distributed in the hope that it will be useful,
  15  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  *  GNU General Public License for more details.
  18  *
  19  *  You should have received a copy of the GNU General Public License
  20  *  along with this program; if not, write to the Free Software
  21  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  22  */
  23
  24 #include <linux/module.h>
  25 #include <linux/moduleparam.h>
  26 #include <media/ir-common.h>
  27
  28 /* -------------------------------------------------------------------------- */
  29
  30 MODULE_AUTHOR("Gerd Knorr <kraxel@bytesex.org> [SuSE Labs]");
  31 MODULE_LICENSE("GPL");
  32
  33 static int repeat = 1;
  34 module_param(repeat, int, 0444);
  35 MODULE_PARM_DESC(repeat,"auto-repeat for IR keys (default: on)");
  36
  37 static int debug = 0;    /* debug level (0,1,2) */
  38 module_param(debug, int, 0644);
  39
  40 #define dprintk(level, fmt, arg...)     if (debug >= level) \
  41         printk(KERN_DEBUG fmt , ## arg)
  42
  43 /* -------------------------------------------------------------------------- */
  44
  45 /* generic RC5 keytable                                          */
  46 /* see http://users.pandora.be/nenya/electronics/rc5/codes00.htm */
  47 /* used by old (black) Hauppauge remotes                         */
  48 IR_KEYTAB_TYPE ir_codes_rc5_tv[IR_KEYTAB_SIZE] = {
  49         [ 0x00 ] = KEY_KP0,             // 0
  50         [ 0x01 ] = KEY_KP1,             // 1
  51         [ 0x02 ] = KEY_KP2,             // 2
  52         [ 0x03 ] = KEY_KP3,             // 3
  53         [ 0x04 ] = KEY_KP4,             // 4
  54         [ 0x05 ] = KEY_KP5,             // 5
  55         [ 0x06 ] = KEY_KP6,             // 6
  56         [ 0x07 ] = KEY_KP7,             // 7
  57         [ 0x08 ] = KEY_KP8,             // 8
  58         [ 0x09 ] = KEY_KP9,             // 9
  59
  60         [ 0x0b ] = KEY_CHANNEL,         // channel / program (japan: 11)
  61         [ 0x0c ] = KEY_POWER,           // standby
  62         [ 0x0d ] = KEY_MUTE,            // mute / demute
  63         [ 0x0f ] = KEY_TV,              // display
  64         [ 0x10 ] = KEY_VOLUMEUP,        // volume +
  65         [ 0x11 ] = KEY_VOLUMEDOWN,      // volume -
  66         [ 0x12 ] = KEY_BRIGHTNESSUP,    // brightness +
  67         [ 0x13 ] = KEY_BRIGHTNESSDOWN,  // brightness -
  68         [ 0x1e ] = KEY_SEARCH,          // search +
  69         [ 0x20 ] = KEY_CHANNELUP,       // channel / program +
  70         [ 0x21 ] = KEY_CHANNELDOWN,     // channel / program -
  71         [ 0x22 ] = KEY_CHANNEL,         // alt / channel
  72         [ 0x23 ] = KEY_LANGUAGE,        // 1st / 2nd language
  73         [ 0x26 ] = KEY_SLEEP,           // sleeptimer
  74         [ 0x2e ] = KEY_MENU,            // 2nd controls (USA: menu)
  75         [ 0x30 ] = KEY_PAUSE,           // pause
  76         [ 0x32 ] = KEY_REWIND,          // rewind
  77         [ 0x33 ] = KEY_GOTO,            // go to
  78         [ 0x35 ] = KEY_PLAY,            // play
  79         [ 0x36 ] = KEY_STOP,            // stop
  80         [ 0x37 ] = KEY_RECORD,          // recording
  81         [ 0x3c ] = KEY_TEXT,            // teletext submode (Japan: 12)
  82         [ 0x3d ] = KEY_SUSPEND,         // system standby
  83
  84 #if 0 /* FIXME */
  85         [ 0x0a ] = KEY_RESERVED,        // 1/2/3 digits (japan: 10)
  86         [ 0x0e ] = KEY_RESERVED,        // P.P. (personal preference)
  87         [ 0x14 ] = KEY_RESERVED,        // colour saturation +
  88         [ 0x15 ] = KEY_RESERVED,        // colour saturation -
  89         [ 0x16 ] = KEY_RESERVED,        // bass +
  90         [ 0x17 ] = KEY_RESERVED,        // bass -
  91         [ 0x18 ] = KEY_RESERVED,        // treble +
  92         [ 0x19 ] = KEY_RESERVED,        // treble -
  93         [ 0x1a ] = KEY_RESERVED,        // balance right
  94         [ 0x1b ] = KEY_RESERVED,        // balance left
  95         [ 0x1c ] = KEY_RESERVED,        // contrast +
  96         [ 0x1d ] = KEY_RESERVED,        // contrast -
  97         [ 0x1f ] = KEY_RESERVED,        // tint/hue +
  98         [ 0x24 ] = KEY_RESERVED,        // spacial stereo on/off
  99         [ 0x25 ] = KEY_RESERVED,        // mono / stereo (USA)
 100         [ 0x27 ] = KEY_RESERVED,        // tint / hue -
 101         [ 0x28 ] = KEY_RESERVED,        // RF switch/PIP select
 102         [ 0x29 ] = KEY_RESERVED,        // vote
 103         [ 0x2a ] = KEY_RESERVED,        // timed page/channel clck
 104         [ 0x2b ] = KEY_RESERVED,        // increment (USA)
 105         [ 0x2c ] = KEY_RESERVED,        // decrement (USA)
 106         [ 0x2d ] = KEY_RESERVED,        //
 107         [ 0x2f ] = KEY_RESERVED,        // PIP shift
 108         [ 0x31 ] = KEY_RESERVED,        // erase
 109         [ 0x34 ] = KEY_RESERVED,        // wind
 110         [ 0x38 ] = KEY_RESERVED,        // external 1
 111         [ 0x39 ] = KEY_RESERVED,        // external 2
 112         [ 0x3a ] = KEY_RESERVED,        // PIP display mode
 113         [ 0x3b ] = KEY_RESERVED,        // view data mode / advance
 114         [ 0x3e ] = KEY_RESERVED,        // crispener on/off
 115         [ 0x3f ] = KEY_RESERVED,        // system select
 116 #endif
 117 };
 118 EXPORT_SYMBOL_GPL(ir_codes_rc5_tv);
 119
 120 /* Table for Leadtek Winfast Remote Controls - used by both bttv and cx88 */
 121 IR_KEYTAB_TYPE ir_codes_winfast[IR_KEYTAB_SIZE] = {
 122         [  5 ] = KEY_KP1,
 123         [  6 ] = KEY_KP2,
 124         [  7 ] = KEY_KP3,
 125         [  9 ] = KEY_KP4,
 126         [ 10 ] = KEY_KP5,
 127         [ 11 ] = KEY_KP6,
 128         [ 13 ] = KEY_KP7,
 129         [ 14 ] = KEY_KP8,
 130         [ 15 ] = KEY_KP9,
 131         [ 18 ] = KEY_KP0,
 132
 133         [  0 ] = KEY_POWER,
 134 //      [ 27 ] = MTS button
 135         [  2 ] = KEY_TUNER,     // TV/FM
 136         [ 30 ] = KEY_VIDEO,
 137 //      [ 22 ] = display button
 138         [  4 ] = KEY_VOLUMEUP,
 139         [  8 ] = KEY_VOLUMEDOWN,
 140         [ 12 ] = KEY_CHANNELUP,
 141         [ 16 ] = KEY_CHANNELDOWN,
 142         [  3 ] = KEY_ZOOM,      // fullscreen
 143         [ 31 ] = KEY_SUBTITLE,  // closed caption/teletext
 144         [ 32 ] = KEY_SLEEP,
 145 //      [ 41 ] = boss key
 146         [ 20 ] = KEY_MUTE,
 147         [ 43 ] = KEY_RED,
 148         [ 44 ] = KEY_GREEN,
 149         [ 45 ] = KEY_YELLOW,
 150         [ 46 ] = KEY_BLUE,
 151         [ 24 ] = KEY_KPPLUS,    //fine tune +
 152         [ 25 ] = KEY_KPMINUS,   //fine tune -
 153 //      [ 42 ] = picture in picture
 154         [ 33 ] = KEY_KPDOT,
 155         [ 19 ] = KEY_KPENTER,
 156 //      [ 17 ] = recall
 157         [ 34 ] = KEY_BACK,
 158         [ 35 ] = KEY_PLAYPAUSE,
 159         [ 36 ] = KEY_NEXT,
 160 //      [ 37 ] = time shifting
 161         [ 38 ] = KEY_STOP,
 162         [ 39 ] = KEY_RECORD
 163 //      [ 40 ] = snapshot
 164 };
 165 EXPORT_SYMBOL_GPL(ir_codes_winfast);
 166
 167 /* empty keytable, can be used as placeholder for not-yet created keytables */
 168 IR_KEYTAB_TYPE ir_codes_empty[IR_KEYTAB_SIZE] = {
 169         [ 42 ] = KEY_COFFEE,
 170 };
 171 EXPORT_SYMBOL_GPL(ir_codes_empty);
 172
 173 /* Hauppauge: the newer, gray remotes (seems there are multiple
 174  * slightly different versions), shipped with cx88+ivtv cards.
 175  * almost rc5 coding, but some non-standard keys */
 176 IR_KEYTAB_TYPE ir_codes_hauppauge_new[IR_KEYTAB_SIZE] = {
 177         [ 0x00 ] = KEY_KP0,             // 0
 178         [ 0x01 ] = KEY_KP1,             // 1
 179         [ 0x02 ] = KEY_KP2,             // 2
 180         [ 0x03 ] = KEY_KP3,             // 3
 181         [ 0x04 ] = KEY_KP4,             // 4
 182         [ 0x05 ] = KEY_KP5,             // 5
 183         [ 0x06 ] = KEY_KP6,             // 6
 184         [ 0x07 ] = KEY_KP7,             // 7
 185         [ 0x08 ] = KEY_KP8,             // 8
 186         [ 0x09 ] = KEY_KP9,             // 9
 187         [ 0x0b ] = KEY_RED,             // red button
 188         [ 0x0c ] = KEY_OPTION,          // black key without text
 189         [ 0x0d ] = KEY_MENU,            // menu
 190         [ 0x0f ] = KEY_MUTE,            // mute
 191         [ 0x10 ] = KEY_VOLUMEUP,        // volume +
 192         [ 0x11 ] = KEY_VOLUMEDOWN,      // volume -
 193         [ 0x1e ] = KEY_NEXT,            // skip >|
 194         [ 0x1f ] = KEY_EXIT,            // back/exit
 195         [ 0x20 ] = KEY_CHANNELUP,       // channel / program +
 196         [ 0x21 ] = KEY_CHANNELDOWN,     // channel / program -
 197         [ 0x22 ] = KEY_CHANNEL,         // source (old black remote)
 198         [ 0x24 ] = KEY_PREVIOUS,        // replay |<
 199         [ 0x25 ] = KEY_ENTER,           // OK
 200         [ 0x26 ] = KEY_SLEEP,           // minimize (old black remote)
 201         [ 0x29 ] = KEY_BLUE,            // blue key
 202         [ 0x2e ] = KEY_GREEN,           // green button
 203         [ 0x30 ] = KEY_PAUSE,           // pause
 204         [ 0x32 ] = KEY_REWIND,          // backward <<
 205         [ 0x34 ] = KEY_FASTFORWARD,     // forward >>
 206         [ 0x35 ] = KEY_PLAY,            // play
 207         [ 0x36 ] = KEY_STOP,            // stop
 208         [ 0x37 ] = KEY_RECORD,          // recording
 209         [ 0x38 ] = KEY_YELLOW,          // yellow key
 210         [ 0x3b ] = KEY_SELECT,          // top right button
 211         [ 0x3c ] = KEY_ZOOM,            // full
 212         [ 0x3d ] = KEY_POWER,           // system power (green button)
 213 };
 214 EXPORT_SYMBOL(ir_codes_hauppauge_new);
 215
 216 /* -------------------------------------------------------------------------- */
 217
 218 static void ir_input_key_event(struct input_dev *dev, struct ir_input_state *ir)
 219 {
 220         if (KEY_RESERVED == ir->keycode) {
 221                 printk(KERN_INFO "%s: unknown key: key=0x%02x raw=0x%02x down=%d\n",
 222                        dev->name,ir->ir_key,ir->ir_raw,ir->keypressed);
 223                 return;
 224         }
 225         dprintk(1,"%s: key event code=%d down=%d\n",
 226                 dev->name,ir->keycode,ir->keypressed);
 227         input_report_key(dev,ir->keycode,ir->keypressed);
 228         input_sync(dev);
 229 }
 230
 231 /* -------------------------------------------------------------------------- */
 232
 233 void ir_input_init(struct input_dev *dev, struct ir_input_state *ir,
 234                    int ir_type, IR_KEYTAB_TYPE *ir_codes)
 235 {
 236         int i;
 237
 238         ir->ir_type = ir_type;
 239         if (ir_codes)
 240                 memcpy(ir->ir_codes, ir_codes, sizeof(ir->ir_codes));
 241
 242         init_input_dev(dev);
 243         dev->keycode     = ir->ir_codes;
 244         dev->keycodesize = sizeof(IR_KEYTAB_TYPE);
 245         dev->keycodemax  = IR_KEYTAB_SIZE;
 246         for (i = 0; i < IR_KEYTAB_SIZE; i++)
 247                 set_bit(ir->ir_codes[i], dev->keybit);
 248         clear_bit(0, dev->keybit);
 249
 250         set_bit(EV_KEY, dev->evbit);
 251         if (repeat)
 252                 set_bit(EV_REP, dev->evbit);
 253 }
 254
 255 void ir_input_nokey(struct input_dev *dev, struct ir_input_state *ir)
 256 {
 257         if (ir->keypressed) {
 258                 ir->keypressed = 0;
 259                 ir_input_key_event(dev,ir);
 260         }
 261 }
 262
 263 void ir_input_keydown(struct input_dev *dev, struct ir_input_state *ir,
 264                       u32 ir_key, u32 ir_raw)
 265 {
 266         u32 keycode = IR_KEYCODE(ir->ir_codes, ir_key);
 267
 268         if (ir->keypressed && ir->keycode != keycode) {
 269                 ir->keypressed = 0;
 270                 ir_input_key_event(dev,ir);
 271         }
 272         if (!ir->keypressed) {
 273                 ir->ir_key  = ir_key;
 274                 ir->ir_raw  = ir_raw;
 275                 ir->keycode = keycode;
 276                 ir->keypressed = 1;
 277                 ir_input_key_event(dev,ir);
 278         }
 279 #if 0
 280         /* maybe do something like this ??? */
 281         input_event(a, EV_IR, ir->ir_type, ir->ir_raw);
 282 #endif
 283 }
 284
 285 /* -------------------------------------------------------------------------- */
 286
 287 u32 ir_extract_bits(u32 data, u32 mask)
 288 {
 289         int mbit, vbit;
 290         u32 value;
 291
 292         value = 0;
 293         vbit  = 0;
 294         for (mbit = 0; mbit < 32; mbit++) {
 295                 if (!(mask & ((u32)1 << mbit)))
 296                         continue;
 297                 if (data & ((u32)1 << mbit))
 298                         value |= (1 << vbit);
 299                 vbit++;
 300         }
 301         return value;
 302 }
 303
 304 static int inline getbit(u32 *samples, int bit)
 305 {
 306         return (samples[bit/32] & (1 << (31-(bit%32)))) ? 1 : 0;
 307 }
 308
 309 /* sump raw samples for visual debugging ;) */
 310 int ir_dump_samples(u32 *samples, int count)
 311 {
 312         int i, bit, start;
 313
 314         printk(KERN_DEBUG "ir samples: ");
 315         start = 0;
 316         for (i = 0; i < count * 32; i++) {
 317                 bit = getbit(samples,i);
 318                 if (bit)
 319                         start = 1;
 320                 if (0 == start)
 321                         continue;
 322                 printk("%s", bit ? "#" : "_");
 323         }
 324         printk("\n");
 325         return 0;
 326 }
 327
 328 /* decode raw samples, biphase coding, used by rc5 for example */
 329 int ir_decode_biphase(u32 *samples, int count, int low, int high)
 330 {
 331         int i,last,bit,len,flips;
 332         u32 value;
 333
 334         /* find start bit (1) */
 335         for (i = 0; i < 32; i++) {
 336                 bit = getbit(samples,i);
 337                 if (bit)
 338                         break;
 339         }
 340
 341         /* go decoding */
 342         len   = 0;
 343         flips = 0;
 344         value = 1;
 345         for (; i < count * 32; i++) {
 346                 if (len > high)
 347                         break;
 348                 if (flips > 1)
 349                         break;
 350                 last = bit;
 351                 bit  = getbit(samples,i);
 352                 if (last == bit) {
 353                         len++;
 354                         continue;
 355                 }
 356                 if (len < low) {
 357                         len++;
 358                         flips++;
 359                         continue;
 360                 }
 361                 value <<= 1;
 362                 value |= bit;
 363                 flips = 0;
 364                 len   = 1;
 365         }
 366         return value;
 367 }
 368
 369 EXPORT_SYMBOL_GPL(ir_input_init);
 370 EXPORT_SYMBOL_GPL(ir_input_nokey);
 371 EXPORT_SYMBOL_GPL(ir_input_keydown);
 372
 373 EXPORT_SYMBOL_GPL(ir_extract_bits);
 374 EXPORT_SYMBOL_GPL(ir_dump_samples);
 375 EXPORT_SYMBOL_GPL(ir_decode_biphase);
 376
 377 /*
 378  * Local variables:
 379  * c-basic-offset: 8
 380  * End:
 381  */