common/keyboard.c

   1 /*
   2 Copyright 2011 Jun Wako <wakojun@gmail.com>
   3
   4 This program is free software: you can redistribute it and/or modify
   5 it under the terms of the GNU General Public License as published by
   6 the Free Software Foundation, either version 2 of the License, or
   7 (at your option) any later version.
   8
   9 This program is distributed in the hope that it will be useful,
  10 but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 GNU General Public License for more details.
  13
  14 You should have received a copy of the GNU General Public License
  15 along with this program.  If not, see <http://www.gnu.org/licenses/>.
  16 */
  17 #include "keyboard.h"
  18 #include "matrix.h"
  19 #include "keymap.h"
  20 #include "host.h"
  21 #include "led.h"
  22 #include "keycode.h"
  23 #include "timer.h"
  24 #include "print.h"
  25 #include "debug.h"
  26 #include "command.h"
  27 #include "util.h"
  28 #ifdef MOUSEKEY_ENABLE
  29 #include "mousekey.h"
  30 #endif
  31
  32
  33 #define Kdebug(s)       do { if (debug_keyboard) debug(s); } while(0)
  34 #define Kdebug_P(s)     do { if (debug_keyboard) debug_P(s); } while(0)
  35 #define Kdebug_hex(s)   do { if (debug_keyboard) debug_hex(s); } while(0)
  36
  37 #define LAYER_DELAY     250
  38
  39 typedef enum keykind {
  40     NONE,
  41     FN_DOWN, FN_UP,
  42     FNK_DOWN, FNK_UP,
  43     KEY_DOWN, KEY_UP,
  44     MOD_DOWN, MOD_UP,
  45 } keykind_t;
  46
  47 typedef enum { IDLE, DELAYING, WAITING, PRESSING } kbdstate_t;
  48
  49
  50 #ifdef KEYMAP_DEFAULT_LAYER
  51 uint8_t default_layer = KEYMAP_DEFAULT_LAYER;
  52 uint8_t current_layer = KEYMAP_DEFAULT_LAYER;
  53 #else
  54 uint8_t default_layer = 0;
  55 uint8_t current_layer = 0;
  56 #endif
  57
  58 /* keyboard internal states */
  59 static kbdstate_t kbdstate = IDLE;
  60 static uint8_t fn_state_bits = 0;
  61 static keyrecord_t delayed_fn;
  62 static keyrecord_t waiting_key;
  63
  64
  65 static const char *state_str(kbdstate_t state)
  66 {
  67     if (state == IDLE)      return PSTR("IDLE");
  68     if (state == DELAYING)  return PSTR("DELAYING");
  69     if (state == WAITING)   return PSTR("WAITING");
  70     if (state == PRESSING)  return PSTR("PRESSING");
  71     return PSTR("UNKNOWN");
  72 }
  73
  74 static inline keykind_t get_keykind(uint8_t code, bool pressed)
  75 {
  76     if IS_KEY(code)         return (pressed ? KEY_DOWN : KEY_UP);
  77     if IS_MOD(code)         return (pressed ? MOD_DOWN : MOD_UP);
  78     if IS_FN(code) {
  79         if (keymap_fn_keycode(FN_INDEX(code)))
  80             return (pressed ? FNK_DOWN : FNK_UP);
  81         else
  82             return (pressed ? FN_DOWN : FN_UP);
  83     }
  84     if IS_MOUSEKEY(code)    return (pressed ? KEY_DOWN : KEY_UP);
  85     if IS_SYSTEM(code)      return (pressed ? KEY_DOWN : KEY_UP);
  86     if IS_CONSUMER(code)    return (pressed ? KEY_DOWN : KEY_UP);
  87     return  NONE;
  88 }
  89
  90 static void clear_keyboard(void)
  91 {
  92     host_clear_keys();
  93     host_clear_mods();
  94     host_send_keyboard_report();
  95
  96     host_system_send(0);
  97     host_consumer_send(0);
  98
  99 #ifdef MOUSEKEY_ENABLE
 100     mousekey_clear();
 101     mousekey_send();
 102 #endif
 103 }
 104
 105 static void clear_keyboard_but_mods(void)
 106 {
 107     host_clear_keys();
 108     host_send_keyboard_report();
 109
 110     host_system_send(0);
 111     host_consumer_send(0);
 112
 113 #ifdef MOUSEKEY_ENABLE
 114     mousekey_clear();
 115     mousekey_send();
 116 #endif
 117 }
 118
 119 static bool anykey_sent_to_host(void)
 120 {
 121     return (host_has_anykey() || host_mouse_in_use() ||
 122             host_last_sysytem_report() || host_last_consumer_report());
 123 }
 124
 125 static void layer_switch_on(uint8_t code)
 126 {
 127     if (!IS_FN(code)) return;
 128     fn_state_bits |= FN_BIT(code);
 129     uint8_t new_layer = (fn_state_bits ? keymap_fn_layer(biton(fn_state_bits)) : default_layer);
 130     if (current_layer != new_layer) {
 131         Kdebug("Layer Switch(on): "); Kdebug_hex(current_layer);
 132         Kdebug(" -> "); Kdebug_hex(new_layer); Kdebug("\n");
 133
 134         clear_keyboard_but_mods();
 135         current_layer = new_layer;
 136     }
 137 }
 138
 139 static bool layer_switch_off(uint8_t code)
 140 {
 141     if (!IS_FN(code)) return false;
 142     fn_state_bits &= ~FN_BIT(code);
 143     uint8_t new_layer = (fn_state_bits ? keymap_fn_layer(biton(fn_state_bits)) : default_layer);
 144     if (current_layer != new_layer) {
 145         Kdebug("Layer Switch(off): "); Kdebug_hex(current_layer);
 146         Kdebug(" -> "); Kdebug_hex(new_layer); Kdebug("\n");
 147
 148         clear_keyboard_but_mods();
 149         current_layer = new_layer;
 150         return true;
 151     }
 152     return false;
 153 }
 154
 155 static void register_code(uint8_t code)
 156 {
 157     if IS_KEY(code) {
 158         if (!command_proc(code)) {
 159             host_add_key(code);
 160             host_send_keyboard_report();
 161         }
 162     }
 163     else if IS_MOD(code) {
 164         host_add_mod_bit(MOD_BIT(code));
 165         host_send_keyboard_report();
 166     }
 167     else if IS_FN(code) {
 168         if (!command_proc(keymap_fn_keycode(FN_INDEX(code)))) {
 169             host_add_key(keymap_fn_keycode(FN_INDEX(code)));
 170             host_send_keyboard_report();
 171         }
 172     }
 173     else if IS_MOUSEKEY(code) {
 174 #ifdef MOUSEKEY_ENABLE
 175         mousekey_on(code);
 176         mousekey_send();
 177 #endif
 178     }
 179     else if IS_CONSUMER(code) {
 180         uint16_t usage = 0;
 181         switch (code) {
 182             case KC_AUDIO_MUTE:
 183                 usage = AUDIO_MUTE;
 184                 break;
 185             case KC_AUDIO_VOL_UP:
 186                 usage = AUDIO_VOL_UP;
 187                 break;
 188             case KC_AUDIO_VOL_DOWN:
 189                 usage = AUDIO_VOL_DOWN;
 190                 break;
 191             case KC_MEDIA_NEXT_TRACK:
 192                 usage = TRANSPORT_NEXT_TRACK;
 193                 break;
 194             case KC_MEDIA_PREV_TRACK:
 195                 usage = TRANSPORT_PREV_TRACK;
 196                 break;
 197             case KC_MEDIA_STOP:
 198                 usage = TRANSPORT_STOP;
 199                 break;
 200             case KC_MEDIA_PLAY_PAUSE:
 201                 usage = TRANSPORT_PLAY_PAUSE;
 202                 break;
 203             case KC_MEDIA_SELECT:
 204                 usage = AL_CC_CONFIG;
 205                 break;
 206             case KC_MAIL:
 207                 usage = AL_EMAIL;
 208                 break;
 209             case KC_CALCULATOR:
 210                 usage = AL_CALCULATOR;
 211                 break;
 212             case KC_MY_COMPUTER:
 213                 usage = AL_LOCAL_BROWSER;
 214                 break;
 215             case KC_WWW_SEARCH:
 216                 usage = AC_SEARCH;
 217                 break;
 218             case KC_WWW_HOME:
 219                 usage = AC_HOME;
 220                 break;
 221             case KC_WWW_BACK:
 222                 usage = AC_BACK;
 223                 break;
 224             case KC_WWW_FORWARD:
 225                 usage = AC_FORWARD;
 226                 break;
 227             case KC_WWW_STOP:
 228                 usage = AC_STOP;
 229                 break;
 230             case KC_WWW_REFRESH:
 231                 usage = AC_REFRESH;
 232                 break;
 233             case KC_WWW_FAVORITES:
 234                 usage = AC_BOOKMARKS;
 235                 break;
 236         }
 237         host_consumer_send(usage);
 238     }
 239     else if IS_SYSTEM(code) {
 240         uint16_t usage = 0;
 241         switch (code) {
 242             case KC_SYSTEM_POWER:
 243                 usage = SYSTEM_POWER_DOWN;
 244                 break;
 245             case KC_SYSTEM_SLEEP:
 246                 usage = SYSTEM_SLEEP;
 247                 break;
 248             case KC_SYSTEM_WAKE:
 249                 usage = SYSTEM_WAKE_UP;
 250                 break;
 251         }
 252         host_system_send(usage);
 253     }
 254
 255 }
 256
 257 static void unregister_code(uint8_t code)
 258 {
 259     if IS_KEY(code) {
 260         host_del_key(code);
 261         host_send_keyboard_report();
 262     }
 263     else if IS_MOD(code) {
 264         host_del_mod_bit(MOD_BIT(code));
 265         host_send_keyboard_report();
 266     }
 267     else if IS_FN(code) {
 268         host_del_key(keymap_fn_keycode(FN_INDEX(code)));
 269         host_send_keyboard_report();
 270     }
 271     else if IS_MOUSEKEY(code) {
 272 #ifdef MOUSEKEY_ENABLE
 273         mousekey_off(code);
 274         mousekey_send();
 275 #endif
 276     }
 277     else if IS_CONSUMER(code) {
 278         host_consumer_send(0x0000);
 279     }
 280     else if IS_SYSTEM(code) {
 281         host_system_send(0x0000);
 282     }
 283 }
 284
 285 /*
 286  *
 287  * Event/State|IDLE          PRESSING      DELAYING[f]      WAITING[f,k]
 288  * -----------+------------------------------------------------------------------
 289  * Fn  Down   |(L+)          -*1           WAITING(Sk)      IDLE(Rf,Ps)*7
 290  *     Up     |(L-)          IDLE(L-)*8    IDLE(L-)*8       IDLE(L-)*8
 291  * Fnk Down   |DELAYING(Sf)* (Rf)          WAITING(Sk)      IDLE(Rf,Ps,Rf)
 292  *     Up     |(L-)          IDLE(L-/Uf)*8 IDLE(Rf,Uf/L-)*3 IDLE(Rf,Ps,Uf/L-)*3
 293  * Key Down   |PRESSING(Rk)  (Rk)          WAITING(Sk)      IDLE(Rf,Ps,Rk)
 294  *     Up     |(Uk)          IDLE(Uk)*4    (Uk)             IDLE(L+,Ps,Pk)/(Uk)*a
 295  *            |
 296  * Delay      |-             -             IDLE(L+)         IDLE(L+,Ps)
 297  * Magic Key  |COMMAND*5
 298  *
 299  * *1: ignore Fn if other key is down.
 300  * *2: register Fnk if any key is pressing
 301  * *3: register/unregister delayed Fnk and move to IDLE if code == delayed Fnk, else *8
 302  * *4: if no keys registered to host
 303  * *5: unregister all keys
 304  * *6: only if no keys down
 305  * *7: ignore Fn because Fnk key and stored key are down.
 306  * *8: move to IDLE if layer switch(off) occurs, else stay at current state
 307  * *9: repeat key if pressing Fnk twice quickly(move to PRESSING)
 308  * *a: layer switch and process waiting key and code if code == wainting key, else unregister key
 309  *
 310  * States:
 311  *      IDLE: No key is down except modifiers
 312  *      DELAYING: delay layer switch after pressing Fn with alt keycode
 313  *      WAITING: key is pressed during DELAYING
 314  *
 315  * Events:
 316  *      Fn: Fn key without alternative keycode
 317  *      Fnk: Fn key with alternative keycode
 318  *      -: ignore
 319  *      Delay: layer switch delay term is elapsed
 320  *
 321  * Actions:
 322  *      Rk: register key
 323  *      Uk: unregister key
 324  *      Rf: register Fn(alt keycode)
 325  *      Uf: unregister Fn(alt keycode)
 326  *      Rs: register stored key
 327  *      Us: unregister stored key
 328  *      Sk: Store key(waiting Key)
 329  *      Sf: Store Fn(delayed Fn)
 330  *      Ps: Process stored key
 331  *      Ps: Process key
 332  *      Is: Interpret stored keys in current layer
 333  *      L+: Switch to new layer(*unregister* all keys but modifiers)
 334  *      L-: Switch back to last layer(*unregister* all keys but modifiers)
 335  *      Ld: Switch back to default layer(*unregister* all keys but modifiers)
 336  */
 337 #define NEXT(state)     do { \
 338     Kdebug("NEXT: "); Kdebug_P(state_str(kbdstate)); \
 339     kbdstate = state; \
 340     Kdebug(" -> "); Kdebug_P(state_str(kbdstate)); Kdebug("\n"); \
 341 } while (0)
 342
 343 static inline void process_key(keyevent_t event)
 344 {
 345     uint8_t code = keymap_get_keycode(current_layer, event.key.row, event.key.col);
 346     keykind_t kind = get_keykind(code, event.pressed);
 347
 348     uint8_t tmp_mods;
 349
 350     Kdebug("state: "); Kdebug_P(state_str(kbdstate));
 351     Kdebug(" kind: "); Kdebug_hex(kind);
 352     Kdebug(" code: "); Kdebug_hex(code);
 353     if (event.pressed) { Kdebug("d"); } else { Kdebug("u"); }
 354     Kdebug("\n");
 355
 356     switch (kbdstate) {
 357         case IDLE:
 358             switch (kind) {
 359                 case FN_DOWN:
 360                     layer_switch_on(code);
 361                     break;
 362                 case FN_UP:
 363                     layer_switch_off(code);
 364                     break;
 365                 case FNK_DOWN:
 366                     // repeat Fn alt key when press Fn key down, up then down again quickly
 367                     if (KEYEQ(delayed_fn.event.key, event.key) &&
 368                             timer_elapsed(delayed_fn.time) < LAYER_DELAY) {
 369                         register_code(code);
 370                         NEXT(PRESSING);
 371                     } else {
 372                         delayed_fn = (keyrecord_t) {
 373                             .event = event,
 374                             .code = code,
 375                             .mods = keyboard_report->mods,
 376                             .time = timer_read()
 377                         };
 378                         NEXT(DELAYING);
 379                     }
 380                     break;
 381                 case FNK_UP:
 382                     layer_switch_off(code);
 383                     break;
 384                 case KEY_DOWN:
 385                     register_code(code);
 386                     NEXT(PRESSING);
 387                     break;
 388                 case MOD_DOWN:
 389                     register_code(code);
 390                     break;
 391                 case KEY_UP:
 392                 case MOD_UP:
 393                     unregister_code(code);
 394                     break;
 395                 default:
 396                     break;
 397             }
 398             break;
 399         case PRESSING:
 400             switch (kind) {
 401                 case FN_DOWN:
 402                     // ignored when any key is pressed
 403                     break;
 404                 case FN_UP:
 405                     if (layer_switch_off(code))
 406                         NEXT(IDLE);
 407                     break;
 408                 case FNK_DOWN:
 409                     register_code(code);
 410                     break;
 411                 case FNK_UP:
 412                     if (layer_switch_off(code)) {
 413                         NEXT(IDLE);
 414                     } else {
 415                         unregister_code(code);
 416                         if (!anykey_sent_to_host())
 417                             NEXT(IDLE);
 418                     }
 419                     break;
 420                 case KEY_DOWN:
 421                 case MOD_DOWN:
 422                     register_code(code);
 423                     break;
 424                 case KEY_UP:
 425                 case MOD_UP:
 426                     unregister_code(code);
 427                     if (!anykey_sent_to_host())
 428                         NEXT(IDLE);
 429                     break;
 430                 default:
 431                     break;
 432             }
 433             break;
 434         case DELAYING:
 435             switch (kind) {
 436                 case FN_DOWN:
 437                 case FNK_DOWN:
 438                 case KEY_DOWN:
 439                     waiting_key = (keyrecord_t) {
 440                         .event = event,
 441                         .code = code,
 442                         .mods = keyboard_report->mods,
 443                         .time = timer_read()
 444                     };
 445                     NEXT(WAITING);
 446                     break;
 447                 case MOD_DOWN:
 448                     register_code(code);
 449                     break;
 450                 case FN_UP:
 451                     if (layer_switch_off(code))
 452                         NEXT(IDLE);
 453                     break;
 454                 case FNK_UP:
 455                     if (code == delayed_fn.code) {
 456                         // type Fn with alt keycode
 457                         // restore the mod status at the time of pressing Fn key
 458                         tmp_mods = keyboard_report->mods;
 459                         host_set_mods(delayed_fn.mods);
 460                         register_code(delayed_fn.code);
 461                         unregister_code(delayed_fn.code);
 462                         host_set_mods(tmp_mods);
 463                         NEXT(IDLE);
 464                     } else {
 465                         if (layer_switch_off(code))
 466                             NEXT(IDLE);
 467                     }
 468                     break;
 469                 case KEY_UP:
 470                 case MOD_UP:
 471                     unregister_code(code);
 472                     break;
 473                 default:
 474                     break;
 475             }
 476             break;
 477         case WAITING:
 478             switch (kind) {
 479                 case FN_DOWN:
 480                 case FNK_DOWN:
 481                 case KEY_DOWN:
 482                     tmp_mods = keyboard_report->mods;
 483                     host_set_mods(delayed_fn.mods);
 484                     register_code(delayed_fn.code);
 485                     host_set_mods(waiting_key.mods);
 486                     register_code(waiting_key.code);
 487                     host_set_mods(tmp_mods);
 488                     if (kind == FN_DOWN) {
 489                         // ignore Fn
 490                     } else if (kind == FNK_DOWN) {
 491                         register_code(code);
 492                     } else if (kind == KEY_DOWN) {
 493                         register_code(code);
 494                     }
 495                     NEXT(IDLE);
 496                     break;
 497                 case MOD_DOWN:
 498                     register_code(code);
 499                     break;
 500                 case FN_UP:
 501                     if (layer_switch_off(code))
 502                         NEXT(IDLE);
 503                     break;
 504                 case FNK_UP:
 505                     if (code == delayed_fn.code) {
 506                         // alt down, key down, alt up
 507                         tmp_mods = keyboard_report->mods;
 508                         host_set_mods(delayed_fn.mods);
 509                         register_code(delayed_fn.code);
 510                         host_set_mods(waiting_key.mods);
 511                         register_code(waiting_key.code);
 512                         unregister_code(delayed_fn.code);
 513                         host_set_mods(tmp_mods);
 514                         NEXT(IDLE);
 515                     } else {
 516                         if (layer_switch_off(code))
 517                             NEXT(IDLE);
 518                     }
 519                     break;
 520                 case KEY_UP:
 521                     if (code == waiting_key.code) {
 522                         layer_switch_on(delayed_fn.code);
 523                         NEXT(IDLE);
 524                         // process waiting_key
 525                         tmp_mods = keyboard_report->mods;
 526                         host_set_mods(waiting_key.mods);
 527                         process_key(waiting_key.event);
 528                         host_set_mods(tmp_mods);
 529                         process_key(event);
 530                     } else {
 531                         unregister_code(code);
 532                     }
 533                     break;
 534                 case MOD_UP:
 535                     unregister_code(code);
 536                     break;
 537                 default:
 538                     break;
 539             }
 540             break;
 541     }
 542 }
 543
 544 void keyboard_init(void)
 545 {
 546     debug_keyboard = true;
 547
 548     timer_init();
 549     matrix_init();
 550 #ifdef PS2_MOUSE_ENABLE
 551     ps2_mouse_init();
 552 #endif
 553 }
 554
 555 void keyboard_task(void)
 556 {
 557     static matrix_row_t matrix_prev[MATRIX_ROWS];
 558     static uint8_t led_status = 0;
 559     matrix_row_t matrix_row = 0;
 560     matrix_row_t matrix_change = 0;
 561
 562     matrix_scan();
 563     for (int r = 0; r < MATRIX_ROWS; r++) {
 564         matrix_row = matrix_get_row(r);
 565         matrix_change = matrix_row ^ matrix_prev[r];
 566         if (matrix_change) {
 567             if (debug_matrix) matrix_print();
 568
 569             for (int c = 0; c < MATRIX_COLS; c++) {
 570                 if (matrix_change & (1<<c)) {
 571                     process_key((keyevent_t){
 572                         .key = (key_t){ .row = r, .col = c },
 573                         .pressed = (matrix_row & (1<<c))
 574                     });
 575                     // record a processed key
 576                     matrix_prev[r] ^= (1<<c);
 577                     // process a key per task call
 578                     goto MATRIX_LOOP_END;
 579                 }
 580             }
 581         }
 582     }
 583     MATRIX_LOOP_END:
 584
 585     // layer switch when delay term elapses
 586     if (kbdstate == DELAYING || kbdstate == WAITING) {
 587         if (timer_elapsed(delayed_fn.time) > LAYER_DELAY) {
 588             if (kbdstate == DELAYING) {
 589                 layer_switch_on(delayed_fn.code);
 590                 NEXT(IDLE);
 591             }
 592             if (kbdstate == WAITING) {
 593                 layer_switch_on(delayed_fn.code);
 594                 NEXT(IDLE);
 595                 uint8_t tmp_mods = keyboard_report->mods;
 596                 host_set_mods(waiting_key.mods);
 597                 process_key(waiting_key.event);
 598                 host_set_mods(tmp_mods);
 599             }
 600         }
 601     }
 602
 603 #ifdef MOUSEKEY_ENABLE
 604     // mousekey repeat & acceleration
 605     mousekey_task();
 606 #endif
 607
 608     // FAIL SAFE: clear all key if no key down
 609     if (matrix_change) {
 610         matrix_row_t is_matrix_on = 0;
 611         for (int r = 0; r < MATRIX_ROWS; r++) {
 612             is_matrix_on |= matrix_get_row(r);
 613         }
 614         if (!is_matrix_on) {
 615             Kdebug("FAIL SAFE: clear all keys(default layer).\n");
 616             clear_keyboard();
 617             current_layer = default_layer;
 618         }
 619     }
 620
 621     // update LED
 622     if (led_status != host_keyboard_leds()) {
 623         led_status = host_keyboard_leds();
 624         keyboard_set_leds(led_status);
 625     }
 626
 627     return;
 628 }
 629
 630 void keyboard_set_leds(uint8_t leds)
 631 {
 632     led_set(leds);
 633 }