drivers/input/keyboard/lkkbd.c

   1 /*
   2  *  Copyright (C) 2004 by Jan-Benedict Glaw <jbglaw@lug-owl.de>
   3  */
   4
   5 /*
   6  * LK keyboard driver for Linux, based on sunkbd.c (C) by Vojtech Pavlik
   7  */
   8
   9 /*
  10  * DEC LK201 and LK401 keyboard driver for Linux (primary for DECstations
  11  * and VAXstations, but can also be used on any standard RS232 with an
  12  * adaptor).
  13  *
  14  * DISCLAIMER: This works for _me_. If you break anything by using the
  15  * information given below, I will _not_ be liable!
  16  *
  17  * RJ10 pinout:         To DE9:         Or DB25:
  18  *      1 - RxD <---->  Pin 3 (TxD) <-> Pin 2 (TxD)
  19  *      2 - GND <---->  Pin 5 (GND) <-> Pin 7 (GND)
  20  *      4 - TxD <---->  Pin 2 (RxD) <-> Pin 3 (RxD)
  21  *      3 - +12V (from HDD drive connector), DON'T connect to DE9 or DB25!!!
  22  *
  23  * Pin numbers for DE9 and DB25 are noted on the plug (quite small:). For
  24  * RJ10, it's like this:
  25  *
  26  *      __=__   Hold the plug in front of you, cable downwards,
  27  *     /___/|   nose is hidden behind the plug. Now, pin 1 is at
  28  *    |1234||   the left side, pin 4 at the right and 2 and 3 are
  29  *    |IIII||   in between, of course:)
  30  *    |    ||
  31  *    |____|/
  32  *      ||      So the adaptor consists of three connected cables
  33  *      ||      for data transmission (RxD and TxD) and signal ground.
  34  *              Additionally, you have to get +12V from somewhere.
  35  * Most easily, you'll get that from a floppy or HDD power connector.
  36  * It's the yellow cable there (black is ground and red is +5V).
  37  *
  38  * The keyboard and all the commands it understands are documented in
  39  * "VCB02 Video Subsystem - Technical Manual", EK-104AA-TM-001. This
  40  * document is LK201 specific, but LK401 is mostly compatible. It comes
  41  * up in LK201 mode and doesn't report any of the additional keys it
  42  * has. These need to be switched on with the LK_CMD_ENABLE_LK401
  43  * command. You'll find this document (scanned .pdf file) on MANX,
  44  * a search engine specific to DEC documentation. Try
  45  * http://www.vt100.net/manx/details?pn=EK-104AA-TM-001;id=21;cp=1
  46  */
  47
  48 /*
  49  * This program is free software; you can redistribute it and/or modify
  50  * it under the terms of the GNU General Public License as published by
  51  * the Free Software Foundation; either version 2 of the License, or
  52  * (at your option) any later version.
  53  *
  54  * This program is distributed in the hope that it will be useful,
  55  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  56  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  57  * GNU General Public License for more details.
  58  *
  59  * You should have received a copy of the GNU General Public License
  60  * along with this program; if not, write to the Free Software
  61  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  62  *
  63  * Should you need to contact me, the author, you can do so either by
  64  * email or by paper mail:
  65  * Jan-Benedict Glaw, Lilienstraße 16, 33790 Hörste (near Halle/Westf.),
  66  * Germany.
  67  */
  68
  69 #include <linux/delay.h>
  70 #include <linux/slab.h>
  71 #include <linux/module.h>
  72 #include <linux/moduleparam.h>
  73 #include <linux/interrupt.h>
  74 #include <linux/init.h>
  75 #include <linux/input.h>
  76 #include <linux/serio.h>
  77 #include <linux/workqueue.h>
  78
  79 #define DRIVER_DESC     "LK keyboard driver"
  80
  81 MODULE_AUTHOR ("Jan-Benedict Glaw <jbglaw@lug-owl.de>");
  82 MODULE_DESCRIPTION (DRIVER_DESC);
  83 MODULE_LICENSE ("GPL");
  84
  85 /*
  86  * Known parameters:
  87  *      bell_volume
  88  *      keyclick_volume
  89  *      ctrlclick_volume
  90  *
  91  * Please notice that there's not yet an API to set these at runtime.
  92  */
  93 static int bell_volume = 100; /* % */
  94 module_param (bell_volume, int, 0);
  95 MODULE_PARM_DESC (bell_volume, "Bell volume (in %). default is 100%");
  96
  97 static int keyclick_volume = 100; /* % */
  98 module_param (keyclick_volume, int, 0);
  99 MODULE_PARM_DESC (keyclick_volume, "Keyclick volume (in %), default is 100%");
 100
 101 static int ctrlclick_volume = 100; /* % */
 102 module_param (ctrlclick_volume, int, 0);
 103 MODULE_PARM_DESC (ctrlclick_volume, "Ctrlclick volume (in %), default is 100%");
 104
 105 static int lk201_compose_is_alt;
 106 module_param (lk201_compose_is_alt, int, 0);
 107 MODULE_PARM_DESC (lk201_compose_is_alt, "If set non-zero, LK201' Compose key "
 108                 "will act as an Alt key");
 109
 110
 111
 112 #undef LKKBD_DEBUG
 113 #ifdef LKKBD_DEBUG
 114 #define DBG(x...) printk (x)
 115 #else
 116 #define DBG(x...) do {} while (0)
 117 #endif
 118
 119 /* LED control */
 120 #define LK_LED_WAIT             0x81
 121 #define LK_LED_COMPOSE          0x82
 122 #define LK_LED_SHIFTLOCK        0x84
 123 #define LK_LED_SCROLLLOCK       0x88
 124 #define LK_CMD_LED_ON           0x13
 125 #define LK_CMD_LED_OFF          0x11
 126
 127 /* Mode control */
 128 #define LK_MODE_DOWN            0x80
 129 #define LK_MODE_AUTODOWN        0x82
 130 #define LK_MODE_UPDOWN          0x86
 131 #define LK_CMD_SET_MODE(mode,div)       ((mode) | ((div) << 3))
 132
 133 /* Misc commands */
 134 #define LK_CMD_ENABLE_KEYCLICK  0x1b
 135 #define LK_CMD_DISABLE_KEYCLICK 0x99
 136 #define LK_CMD_DISABLE_BELL     0xa1
 137 #define LK_CMD_SOUND_BELL       0xa7
 138 #define LK_CMD_ENABLE_BELL      0x23
 139 #define LK_CMD_DISABLE_CTRCLICK 0xb9
 140 #define LK_CMD_ENABLE_CTRCLICK  0xbb
 141 #define LK_CMD_SET_DEFAULTS     0xd3
 142 #define LK_CMD_POWERCYCLE_RESET 0xfd
 143 #define LK_CMD_ENABLE_LK401     0xe9
 144 #define LK_CMD_REQUEST_ID       0xab
 145
 146 /* Misc responses from keyboard */
 147 #define LK_STUCK_KEY            0x3d
 148 #define LK_SELFTEST_FAILED      0x3e
 149 #define LK_ALL_KEYS_UP          0xb3
 150 #define LK_METRONOME            0xb4
 151 #define LK_OUTPUT_ERROR         0xb5
 152 #define LK_INPUT_ERROR          0xb6
 153 #define LK_KBD_LOCKED           0xb7
 154 #define LK_KBD_TEST_MODE_ACK    0xb8
 155 #define LK_PREFIX_KEY_DOWN      0xb9
 156 #define LK_MODE_CHANGE_ACK      0xba
 157 #define LK_RESPONSE_RESERVED    0xbb
 158
 159 #define LK_NUM_KEYCODES         256
 160 #define LK_NUM_IGNORE_BYTES     6
 161 typedef u_int16_t lk_keycode_t;
 162
 163
 164
 165 static lk_keycode_t lkkbd_keycode[LK_NUM_KEYCODES] = {
 166         [0x56] = KEY_F1,
 167         [0x57] = KEY_F2,
 168         [0x58] = KEY_F3,
 169         [0x59] = KEY_F4,
 170         [0x5a] = KEY_F5,
 171         [0x64] = KEY_F6,
 172         [0x65] = KEY_F7,
 173         [0x66] = KEY_F8,
 174         [0x67] = KEY_F9,
 175         [0x68] = KEY_F10,
 176         [0x71] = KEY_F11,
 177         [0x72] = KEY_F12,
 178         [0x73] = KEY_F13,
 179         [0x74] = KEY_F14,
 180         [0x7c] = KEY_F15,
 181         [0x7d] = KEY_F16,
 182         [0x80] = KEY_F17,
 183         [0x81] = KEY_F18,
 184         [0x82] = KEY_F19,
 185         [0x83] = KEY_F20,
 186         [0x8a] = KEY_FIND,
 187         [0x8b] = KEY_INSERT,
 188         [0x8c] = KEY_DELETE,
 189         [0x8d] = KEY_SELECT,
 190         [0x8e] = KEY_PAGEUP,
 191         [0x8f] = KEY_PAGEDOWN,
 192         [0x92] = KEY_KP0,
 193         [0x94] = KEY_KPDOT,
 194         [0x95] = KEY_KPENTER,
 195         [0x96] = KEY_KP1,
 196         [0x97] = KEY_KP2,
 197         [0x98] = KEY_KP3,
 198         [0x99] = KEY_KP4,
 199         [0x9a] = KEY_KP5,
 200         [0x9b] = KEY_KP6,
 201         [0x9c] = KEY_KPCOMMA,
 202         [0x9d] = KEY_KP7,
 203         [0x9e] = KEY_KP8,
 204         [0x9f] = KEY_KP9,
 205         [0xa0] = KEY_KPMINUS,
 206         [0xa1] = KEY_PROG1,
 207         [0xa2] = KEY_PROG2,
 208         [0xa3] = KEY_PROG3,
 209         [0xa4] = KEY_PROG4,
 210         [0xa7] = KEY_LEFT,
 211         [0xa8] = KEY_RIGHT,
 212         [0xa9] = KEY_DOWN,
 213         [0xaa] = KEY_UP,
 214         [0xab] = KEY_RIGHTSHIFT,
 215         [0xac] = KEY_LEFTALT,
 216         [0xad] = KEY_COMPOSE, /* Right Compose, that is. */
 217         [0xae] = KEY_LEFTSHIFT, /* Same as KEY_RIGHTSHIFT on LK201 */
 218         [0xaf] = KEY_LEFTCTRL,
 219         [0xb0] = KEY_CAPSLOCK,
 220         [0xb1] = KEY_COMPOSE, /* Left Compose, that is. */
 221         [0xb2] = KEY_RIGHTALT,
 222         [0xbc] = KEY_BACKSPACE,
 223         [0xbd] = KEY_ENTER,
 224         [0xbe] = KEY_TAB,
 225         [0xbf] = KEY_ESC,
 226         [0xc0] = KEY_1,
 227         [0xc1] = KEY_Q,
 228         [0xc2] = KEY_A,
 229         [0xc3] = KEY_Z,
 230         [0xc5] = KEY_2,
 231         [0xc6] = KEY_W,
 232         [0xc7] = KEY_S,
 233         [0xc8] = KEY_X,
 234         [0xc9] = KEY_102ND,
 235         [0xcb] = KEY_3,
 236         [0xcc] = KEY_E,
 237         [0xcd] = KEY_D,
 238         [0xce] = KEY_C,
 239         [0xd0] = KEY_4,
 240         [0xd1] = KEY_R,
 241         [0xd2] = KEY_F,
 242         [0xd3] = KEY_V,
 243         [0xd4] = KEY_SPACE,
 244         [0xd6] = KEY_5,
 245         [0xd7] = KEY_T,
 246         [0xd8] = KEY_G,
 247         [0xd9] = KEY_B,
 248         [0xdb] = KEY_6,
 249         [0xdc] = KEY_Y,
 250         [0xdd] = KEY_H,
 251         [0xde] = KEY_N,
 252         [0xe0] = KEY_7,
 253         [0xe1] = KEY_U,
 254         [0xe2] = KEY_J,
 255         [0xe3] = KEY_M,
 256         [0xe5] = KEY_8,
 257         [0xe6] = KEY_I,
 258         [0xe7] = KEY_K,
 259         [0xe8] = KEY_COMMA,
 260         [0xea] = KEY_9,
 261         [0xeb] = KEY_O,
 262         [0xec] = KEY_L,
 263         [0xed] = KEY_DOT,
 264         [0xef] = KEY_0,
 265         [0xf0] = KEY_P,
 266         [0xf2] = KEY_SEMICOLON,
 267         [0xf3] = KEY_SLASH,
 268         [0xf5] = KEY_EQUAL,
 269         [0xf6] = KEY_RIGHTBRACE,
 270         [0xf7] = KEY_BACKSLASH,
 271         [0xf9] = KEY_MINUS,
 272         [0xfa] = KEY_LEFTBRACE,
 273         [0xfb] = KEY_APOSTROPHE,
 274 };
 275
 276 #define CHECK_LED(LK, VAR_ON, VAR_OFF, LED, BITS) do {          \
 277         if (test_bit (LED, (LK)->dev->led))                     \
 278                 VAR_ON |= BITS;                                 \
 279         else                                                    \
 280                 VAR_OFF |= BITS;                                \
 281         } while (0)
 282
 283 /*
 284  * Per-keyboard data
 285  */
 286 struct lkkbd {
 287         lk_keycode_t keycode[LK_NUM_KEYCODES];
 288         int ignore_bytes;
 289         unsigned char id[LK_NUM_IGNORE_BYTES];
 290         struct input_dev *dev;
 291         struct serio *serio;
 292         struct work_struct tq;
 293         char name[64];
 294         char phys[32];
 295         char type;
 296         int bell_volume;
 297         int keyclick_volume;
 298         int ctrlclick_volume;
 299 };
 300
 301 #ifdef LKKBD_DEBUG
 302 /*
 303  * Responses from the keyboard and mapping back to their names.
 304  */
 305 static struct {
 306         unsigned char value;
 307         unsigned char *name;
 308 } lk_response[] = {
 309 #define RESPONSE(x) { .value = (x), .name = #x, }
 310         RESPONSE (LK_STUCK_KEY),
 311         RESPONSE (LK_SELFTEST_FAILED),
 312         RESPONSE (LK_ALL_KEYS_UP),
 313         RESPONSE (LK_METRONOME),
 314         RESPONSE (LK_OUTPUT_ERROR),
 315         RESPONSE (LK_INPUT_ERROR),
 316         RESPONSE (LK_KBD_LOCKED),
 317         RESPONSE (LK_KBD_TEST_MODE_ACK),
 318         RESPONSE (LK_PREFIX_KEY_DOWN),
 319         RESPONSE (LK_MODE_CHANGE_ACK),
 320         RESPONSE (LK_RESPONSE_RESERVED),
 321 #undef RESPONSE
 322 };
 323
 324 static unsigned char *
 325 response_name (unsigned char value)
 326 {
 327         int i;
 328
 329         for (i = 0; i < ARRAY_SIZE (lk_response); i++)
 330                 if (lk_response[i].value == value)
 331                         return lk_response[i].name;
 332
 333         return "<unknown>";
 334 }
 335 #endif /* LKKBD_DEBUG */
 336
 337 /*
 338  * Calculate volume parameter byte for a given volume.
 339  */
 340 static unsigned char
 341 volume_to_hw (int volume_percent)
 342 {
 343         unsigned char ret = 0;
 344
 345         if (volume_percent < 0)
 346                 volume_percent = 0;
 347         if (volume_percent > 100)
 348                 volume_percent = 100;
 349
 350         if (volume_percent >= 0)
 351                 ret = 7;
 352         if (volume_percent >= 13)       /* 12.5 */
 353                 ret = 6;
 354         if (volume_percent >= 25)
 355                 ret = 5;
 356         if (volume_percent >= 38)       /* 37.5 */
 357                 ret = 4;
 358         if (volume_percent >= 50)
 359                 ret = 3;
 360         if (volume_percent >= 63)       /* 62.5 */
 361                 ret = 2;                /* This is the default volume */
 362         if (volume_percent >= 75)
 363                 ret = 1;
 364         if (volume_percent >= 88)       /* 87.5 */
 365                 ret = 0;
 366
 367         ret |= 0x80;
 368
 369         return ret;
 370 }
 371
 372 static void
 373 lkkbd_detection_done (struct lkkbd *lk)
 374 {
 375         int i;
 376
 377         /*
 378          * Reset setting for Compose key. Let Compose be KEY_COMPOSE.
 379          */
 380         lk->keycode[0xb1] = KEY_COMPOSE;
 381
 382         /*
 383          * Print keyboard name and modify Compose=Alt on user's request.
 384          */
 385         switch (lk->id[4]) {
 386                 case 1:
 387                         sprintf (lk->name, "DEC LK201 keyboard");
 388
 389                         if (lk201_compose_is_alt)
 390                                 lk->keycode[0xb1] = KEY_LEFTALT;
 391                         break;
 392
 393                 case 2:
 394                         sprintf (lk->name, "DEC LK401 keyboard");
 395                         break;
 396
 397                 default:
 398                         sprintf (lk->name, "Unknown DEC keyboard");
 399                         printk (KERN_ERR "lkkbd: keyboard on %s is unknown, "
 400                                         "please report to Jan-Benedict Glaw "
 401                                         "<jbglaw@lug-owl.de>\n", lk->phys);
 402                         printk (KERN_ERR "lkkbd: keyboard ID'ed as:");
 403                         for (i = 0; i < LK_NUM_IGNORE_BYTES; i++)
 404                                 printk (" 0x%02x", lk->id[i]);
 405                         printk ("\n");
 406                         break;
 407         }
 408         printk (KERN_INFO "lkkbd: keyboard on %s identified as: %s\n",
 409                         lk->phys, lk->name);
 410
 411         /*
 412          * Report errors during keyboard boot-up.
 413          */
 414         switch (lk->id[2]) {
 415                 case 0x00:
 416                         /* All okay */
 417                         break;
 418
 419                 case LK_STUCK_KEY:
 420                         printk (KERN_ERR "lkkbd: Stuck key on keyboard at "
 421                                         "%s\n", lk->phys);
 422                         break;
 423
 424                 case LK_SELFTEST_FAILED:
 425                         printk (KERN_ERR "lkkbd: Selftest failed on keyboard "
 426                                         "at %s, keyboard may not work "
 427                                         "properly\n", lk->phys);
 428                         break;
 429
 430                 default:
 431                         printk (KERN_ERR "lkkbd: Unknown error %02x on "
 432                                         "keyboard at %s\n", lk->id[2],
 433                                         lk->phys);
 434                         break;
 435         }
 436
 437         /*
 438          * Try to hint user if there's a stuck key.
 439          */
 440         if (lk->id[2] == LK_STUCK_KEY && lk->id[3] != 0)
 441                 printk (KERN_ERR "Scancode of stuck key is 0x%02x, keycode "
 442                                 "is 0x%04x\n", lk->id[3],
 443                                 lk->keycode[lk->id[3]]);
 444
 445         return;
 446 }
 447
 448 /*
 449  * lkkbd_interrupt() is called by the low level driver when a character
 450  * is received.
 451  */
 452 static irqreturn_t
 453 lkkbd_interrupt (struct serio *serio, unsigned char data, unsigned int flags,
 454                 struct pt_regs *regs)
 455 {
 456         struct lkkbd *lk = serio_get_drvdata (serio);
 457         int i;
 458
 459         DBG (KERN_INFO "Got byte 0x%02x\n", data);
 460
 461         if (lk->ignore_bytes > 0) {
 462                 DBG (KERN_INFO "Ignoring a byte on %s\n", lk->name);
 463                 lk->id[LK_NUM_IGNORE_BYTES - lk->ignore_bytes--] = data;
 464
 465                 if (lk->ignore_bytes == 0)
 466                         lkkbd_detection_done (lk);
 467
 468                 return IRQ_HANDLED;
 469         }
 470
 471         switch (data) {
 472                 case LK_ALL_KEYS_UP:
 473                         input_regs (lk->dev, regs);
 474                         for (i = 0; i < ARRAY_SIZE (lkkbd_keycode); i++)
 475                                 if (lk->keycode[i] != KEY_RESERVED)
 476                                         input_report_key (lk->dev, lk->keycode[i], 0);
 477                         input_sync (lk->dev);
 478                         break;
 479
 480                 case 0x01:
 481                         DBG (KERN_INFO "Got 0x01, scheduling re-initialization\n");
 482                         lk->ignore_bytes = LK_NUM_IGNORE_BYTES;
 483                         lk->id[LK_NUM_IGNORE_BYTES - lk->ignore_bytes--] = data;
 484                         schedule_work (&lk->tq);
 485                         break;
 486
 487                 case LK_METRONOME:
 488                 case LK_OUTPUT_ERROR:
 489                 case LK_INPUT_ERROR:
 490                 case LK_KBD_LOCKED:
 491                 case LK_KBD_TEST_MODE_ACK:
 492                 case LK_PREFIX_KEY_DOWN:
 493                 case LK_MODE_CHANGE_ACK:
 494                 case LK_RESPONSE_RESERVED:
 495                         DBG (KERN_INFO "Got %s and don't know how to handle...\n",
 496                                         response_name (data));
 497                         break;
 498
 499                 default:
 500                         if (lk->keycode[data] != KEY_RESERVED) {
 501                                 input_regs (lk->dev, regs);
 502                                 if (!test_bit (lk->keycode[data], lk->dev->key))
 503                                         input_report_key (lk->dev, lk->keycode[data], 1);
 504                                 else
 505                                         input_report_key (lk->dev, lk->keycode[data], 0);
 506                                 input_sync (lk->dev);
 507                         } else
 508                                 printk (KERN_WARNING "%s: Unknown key with "
 509                                                 "scancode 0x%02x on %s.\n",
 510                                                 __FILE__, data, lk->name);
 511         }
 512
 513         return IRQ_HANDLED;
 514 }
 515
 516 /*
 517  * lkkbd_event() handles events from the input module.
 518  */
 519 static int
 520 lkkbd_event (struct input_dev *dev, unsigned int type, unsigned int code,
 521                 int value)
 522 {
 523         struct lkkbd *lk = dev->private;
 524         unsigned char leds_on = 0;
 525         unsigned char leds_off = 0;
 526
 527         switch (type) {
 528                 case EV_LED:
 529                         CHECK_LED (lk, leds_on, leds_off, LED_CAPSL, LK_LED_SHIFTLOCK);
 530                         CHECK_LED (lk, leds_on, leds_off, LED_COMPOSE, LK_LED_COMPOSE);
 531                         CHECK_LED (lk, leds_on, leds_off, LED_SCROLLL, LK_LED_SCROLLLOCK);
 532                         CHECK_LED (lk, leds_on, leds_off, LED_SLEEP, LK_LED_WAIT);
 533                         if (leds_on != 0) {
 534                                 lk->serio->write (lk->serio, LK_CMD_LED_ON);
 535                                 lk->serio->write (lk->serio, leds_on);
 536                         }
 537                         if (leds_off != 0) {
 538                                 lk->serio->write (lk->serio, LK_CMD_LED_OFF);
 539                                 lk->serio->write (lk->serio, leds_off);
 540                         }
 541                         return 0;
 542
 543                 case EV_SND:
 544                         switch (code) {
 545                                 case SND_CLICK:
 546                                         if (value == 0) {
 547                                                 DBG ("%s: Deactivating key clicks\n", __FUNCTION__);
 548                                                 lk->serio->write (lk->serio, LK_CMD_DISABLE_KEYCLICK);
 549                                                 lk->serio->write (lk->serio, LK_CMD_DISABLE_CTRCLICK);
 550                                         } else {
 551                                                 DBG ("%s: Activating key clicks\n", __FUNCTION__);
 552                                                 lk->serio->write (lk->serio, LK_CMD_ENABLE_KEYCLICK);
 553                                                 lk->serio->write (lk->serio, volume_to_hw (lk->keyclick_volume));
 554                                                 lk->serio->write (lk->serio, LK_CMD_ENABLE_CTRCLICK);
 555                                                 lk->serio->write (lk->serio, volume_to_hw (lk->ctrlclick_volume));
 556                                         }
 557                                         return 0;
 558
 559                                 case SND_BELL:
 560                                         if (value != 0)
 561                                                 lk->serio->write (lk->serio, LK_CMD_SOUND_BELL);
 562
 563                                         return 0;
 564                         }
 565                         break;
 566
 567                 default:
 568                         printk (KERN_ERR "%s (): Got unknown type %d, code %d, value %d\n",
 569                                         __FUNCTION__, type, code, value);
 570         }
 571
 572         return -1;
 573 }
 574
 575 /*
 576  * lkkbd_reinit() sets leds and beeps to a state the computer remembers they
 577  * were in.
 578  */
 579 static void
 580 lkkbd_reinit (void *data)
 581 {
 582         struct lkkbd *lk = data;
 583         int division;
 584         unsigned char leds_on = 0;
 585         unsigned char leds_off = 0;
 586
 587         /* Ask for ID */
 588         lk->serio->write (lk->serio, LK_CMD_REQUEST_ID);
 589
 590         /* Reset parameters */
 591         lk->serio->write (lk->serio, LK_CMD_SET_DEFAULTS);
 592
 593         /* Set LEDs */
 594         CHECK_LED (lk, leds_on, leds_off, LED_CAPSL, LK_LED_SHIFTLOCK);
 595         CHECK_LED (lk, leds_on, leds_off, LED_COMPOSE, LK_LED_COMPOSE);
 596         CHECK_LED (lk, leds_on, leds_off, LED_SCROLLL, LK_LED_SCROLLLOCK);
 597         CHECK_LED (lk, leds_on, leds_off, LED_SLEEP, LK_LED_WAIT);
 598         if (leds_on != 0) {
 599                 lk->serio->write (lk->serio, LK_CMD_LED_ON);
 600                 lk->serio->write (lk->serio, leds_on);
 601         }
 602         if (leds_off != 0) {
 603                 lk->serio->write (lk->serio, LK_CMD_LED_OFF);
 604                 lk->serio->write (lk->serio, leds_off);
 605         }
 606
 607         /*
 608          * Try to activate extended LK401 mode. This command will
 609          * only work with a LK401 keyboard and grants access to
 610          * LAlt, RAlt, RCompose and RShift.
 611          */
 612         lk->serio->write (lk->serio, LK_CMD_ENABLE_LK401);
 613
 614         /* Set all keys to UPDOWN mode */
 615         for (division = 1; division <= 14; division++)
 616                 lk->serio->write (lk->serio, LK_CMD_SET_MODE (LK_MODE_UPDOWN,
 617                                         division));
 618
 619         /* Enable bell and set volume */
 620         lk->serio->write (lk->serio, LK_CMD_ENABLE_BELL);
 621         lk->serio->write (lk->serio, volume_to_hw (lk->bell_volume));
 622
 623         /* Enable/disable keyclick (and possibly set volume) */
 624         if (test_bit (SND_CLICK, lk->dev->snd)) {
 625                 lk->serio->write (lk->serio, LK_CMD_ENABLE_KEYCLICK);
 626                 lk->serio->write (lk->serio, volume_to_hw (lk->keyclick_volume));
 627                 lk->serio->write (lk->serio, LK_CMD_ENABLE_CTRCLICK);
 628                 lk->serio->write (lk->serio, volume_to_hw (lk->ctrlclick_volume));
 629         } else {
 630                 lk->serio->write (lk->serio, LK_CMD_DISABLE_KEYCLICK);
 631                 lk->serio->write (lk->serio, LK_CMD_DISABLE_CTRCLICK);
 632         }
 633
 634         /* Sound the bell if needed */
 635         if (test_bit (SND_BELL, lk->dev->snd))
 636                 lk->serio->write (lk->serio, LK_CMD_SOUND_BELL);
 637 }
 638
 639 /*
 640  * lkkbd_connect() probes for a LK keyboard and fills the necessary structures.
 641  */
 642 static int
 643 lkkbd_connect (struct serio *serio, struct serio_driver *drv)
 644 {
 645         struct lkkbd *lk;
 646         struct input_dev *input_dev;
 647         int i;
 648         int err;
 649
 650         lk = kzalloc (sizeof (struct lkkbd), GFP_KERNEL);
 651         input_dev = input_allocate_device ();
 652         if (!lk || !input_dev) {
 653                 err = -ENOMEM;
 654                 goto fail;
 655         }
 656
 657         lk->serio = serio;
 658         lk->dev = input_dev;
 659         INIT_WORK (&lk->tq, lkkbd_reinit, lk);
 660         lk->bell_volume = bell_volume;
 661         lk->keyclick_volume = keyclick_volume;
 662         lk->ctrlclick_volume = ctrlclick_volume;
 663         memcpy (lk->keycode, lkkbd_keycode, sizeof (lk_keycode_t) * LK_NUM_KEYCODES);
 664
 665         strlcpy (lk->name, "DEC LK keyboard", sizeof(lk->name));
 666         snprintf (lk->phys, sizeof(lk->phys), "%s/input0", serio->phys);
 667
 668         input_dev->name = lk->name;
 669         input_dev->phys = lk->phys;
 670         input_dev->id.bustype = BUS_RS232;
 671         input_dev->id.vendor = SERIO_LKKBD;
 672         input_dev->id.product = 0;
 673         input_dev->id.version = 0x0100;
 674         input_dev->cdev.dev = &serio->dev;
 675         input_dev->event = lkkbd_event;
 676         input_dev->private = lk;
 677
 678         set_bit (EV_KEY, input_dev->evbit);
 679         set_bit (EV_LED, input_dev->evbit);
 680         set_bit (EV_SND, input_dev->evbit);
 681         set_bit (EV_REP, input_dev->evbit);
 682         set_bit (LED_CAPSL, input_dev->ledbit);
 683         set_bit (LED_SLEEP, input_dev->ledbit);
 684         set_bit (LED_COMPOSE, input_dev->ledbit);
 685         set_bit (LED_SCROLLL, input_dev->ledbit);
 686         set_bit (SND_BELL, input_dev->sndbit);
 687         set_bit (SND_CLICK, input_dev->sndbit);
 688
 689         input_dev->keycode = lk->keycode;
 690         input_dev->keycodesize = sizeof (lk_keycode_t);
 691         input_dev->keycodemax = LK_NUM_KEYCODES;
 692         for (i = 0; i < LK_NUM_KEYCODES; i++)
 693                 set_bit (lk->keycode[i], input_dev->keybit);
 694
 695         serio_set_drvdata (serio, lk);
 696
 697         err = serio_open (serio, drv);
 698         if (err)
 699                 goto fail;
 700
 701         input_register_device (lk->dev);
 702         lk->serio->write (lk->serio, LK_CMD_POWERCYCLE_RESET);
 703
 704         return 0;
 705
 706  fail:  serio_set_drvdata (serio, NULL);
 707         input_free_device (input_dev);
 708         kfree (lk);
 709         return err;
 710 }
 711
 712 /*
 713  * lkkbd_disconnect() unregisters and closes behind us.
 714  */
 715 static void
 716 lkkbd_disconnect (struct serio *serio)
 717 {
 718         struct lkkbd *lk = serio_get_drvdata (serio);
 719
 720         input_get_device (lk->dev);
 721         input_unregister_device (lk->dev);
 722         serio_close (serio);
 723         serio_set_drvdata (serio, NULL);
 724         input_put_device (lk->dev);
 725         kfree (lk);
 726 }
 727
 728 static struct serio_device_id lkkbd_serio_ids[] = {
 729         {
 730                 .type   = SERIO_RS232,
 731                 .proto  = SERIO_LKKBD,
 732                 .id     = SERIO_ANY,
 733                 .extra  = SERIO_ANY,
 734         },
 735         { 0 }
 736 };
 737
 738 MODULE_DEVICE_TABLE(serio, lkkbd_serio_ids);
 739
 740 static struct serio_driver lkkbd_drv = {
 741         .driver         = {
 742                 .name   = "lkkbd",
 743         },
 744         .description    = DRIVER_DESC,
 745         .id_table       = lkkbd_serio_ids,
 746         .connect        = lkkbd_connect,
 747         .disconnect     = lkkbd_disconnect,
 748         .interrupt      = lkkbd_interrupt,
 749 };
 750
 751 /*
 752  * The functions for insering/removing us as a module.
 753  */
 754 static int __init
 755 lkkbd_init (void)
 756 {
 757         serio_register_driver(&lkkbd_drv);
 758         return 0;
 759 }
 760
 761 static void __exit
 762 lkkbd_exit (void)
 763 {
 764         serio_unregister_driver(&lkkbd_drv);
 765 }
 766
 767 module_init (lkkbd_init);
 768 module_exit (lkkbd_exit);
 769