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
  64 #include <linux/delay.h>
  65 #include <linux/slab.h>
  66 #include <linux/module.h>
  67 #include <linux/moduleparam.h>
  68 #include <linux/interrupt.h>
  69 #include <linux/init.h>
  70 #include <linux/input.h>
  71 #include <linux/serio.h>
  72 #include <linux/workqueue.h>
  73
  74 #define DRIVER_DESC     "LK keyboard driver"
  75
  76 MODULE_AUTHOR ("Jan-Benedict Glaw <jbglaw@lug-owl.de>");
  77 MODULE_DESCRIPTION (DRIVER_DESC);
  78 MODULE_LICENSE ("GPL");
  79
  80 /*
  81  * Known parameters:
  82  *      bell_volume
  83  *      keyclick_volume
  84  *      ctrlclick_volume
  85  *
  86  * Please notice that there's not yet an API to set these at runtime.
  87  */
  88 static int bell_volume = 100; /* % */
  89 module_param (bell_volume, int, 0);
  90 MODULE_PARM_DESC (bell_volume, "Bell volume (in %). default is 100%");
  91
  92 static int keyclick_volume = 100; /* % */
  93 module_param (keyclick_volume, int, 0);
  94 MODULE_PARM_DESC (keyclick_volume, "Keyclick volume (in %), default is 100%");
  95
  96 static int ctrlclick_volume = 100; /* % */
  97 module_param (ctrlclick_volume, int, 0);
  98 MODULE_PARM_DESC (ctrlclick_volume, "Ctrlclick volume (in %), default is 100%");
  99
 100 static int lk201_compose_is_alt;
 101 module_param (lk201_compose_is_alt, int, 0);
 102 MODULE_PARM_DESC (lk201_compose_is_alt, "If set non-zero, LK201' Compose key "
 103                 "will act as an Alt key");
 104
 105
 106
 107 #undef LKKBD_DEBUG
 108 #ifdef LKKBD_DEBUG
 109 #define DBG(x...) printk (x)
 110 #else
 111 #define DBG(x...) do {} while (0)
 112 #endif
 113
 114 /* LED control */
 115 #define LK_LED_WAIT             0x81
 116 #define LK_LED_COMPOSE          0x82
 117 #define LK_LED_SHIFTLOCK        0x84
 118 #define LK_LED_SCROLLLOCK       0x88
 119 #define LK_CMD_LED_ON           0x13
 120 #define LK_CMD_LED_OFF          0x11
 121
 122 /* Mode control */
 123 #define LK_MODE_DOWN            0x80
 124 #define LK_MODE_AUTODOWN        0x82
 125 #define LK_MODE_UPDOWN          0x86
 126 #define LK_CMD_SET_MODE(mode,div)       ((mode) | ((div) << 3))
 127
 128 /* Misc commands */
 129 #define LK_CMD_ENABLE_KEYCLICK  0x1b
 130 #define LK_CMD_DISABLE_KEYCLICK 0x99
 131 #define LK_CMD_DISABLE_BELL     0xa1
 132 #define LK_CMD_SOUND_BELL       0xa7
 133 #define LK_CMD_ENABLE_BELL      0x23
 134 #define LK_CMD_DISABLE_CTRCLICK 0xb9
 135 #define LK_CMD_ENABLE_CTRCLICK  0xbb
 136 #define LK_CMD_SET_DEFAULTS     0xd3
 137 #define LK_CMD_POWERCYCLE_RESET 0xfd
 138 #define LK_CMD_ENABLE_LK401     0xe9
 139 #define LK_CMD_REQUEST_ID       0xab
 140
 141 /* Misc responses from keyboard */
 142 #define LK_STUCK_KEY            0x3d
 143 #define LK_SELFTEST_FAILED      0x3e
 144 #define LK_ALL_KEYS_UP          0xb3
 145 #define LK_METRONOME            0xb4
 146 #define LK_OUTPUT_ERROR         0xb5
 147 #define LK_INPUT_ERROR          0xb6
 148 #define LK_KBD_LOCKED           0xb7
 149 #define LK_KBD_TEST_MODE_ACK    0xb8
 150 #define LK_PREFIX_KEY_DOWN      0xb9
 151 #define LK_MODE_CHANGE_ACK      0xba
 152 #define LK_RESPONSE_RESERVED    0xbb
 153
 154 #define LK_NUM_KEYCODES         256
 155 #define LK_NUM_IGNORE_BYTES     6
 156 typedef u_int16_t lk_keycode_t;
 157
 158
 159
 160 static lk_keycode_t lkkbd_keycode[LK_NUM_KEYCODES] = {
 161         [0x56] = KEY_F1,
 162         [0x57] = KEY_F2,
 163         [0x58] = KEY_F3,
 164         [0x59] = KEY_F4,
 165         [0x5a] = KEY_F5,
 166         [0x64] = KEY_F6,
 167         [0x65] = KEY_F7,
 168         [0x66] = KEY_F8,
 169         [0x67] = KEY_F9,
 170         [0x68] = KEY_F10,
 171         [0x71] = KEY_F11,
 172         [0x72] = KEY_F12,
 173         [0x73] = KEY_F13,
 174         [0x74] = KEY_F14,
 175         [0x7c] = KEY_F15,
 176         [0x7d] = KEY_F16,
 177         [0x80] = KEY_F17,
 178         [0x81] = KEY_F18,
 179         [0x82] = KEY_F19,
 180         [0x83] = KEY_F20,
 181         [0x8a] = KEY_FIND,
 182         [0x8b] = KEY_INSERT,
 183         [0x8c] = KEY_DELETE,
 184         [0x8d] = KEY_SELECT,
 185         [0x8e] = KEY_PAGEUP,
 186         [0x8f] = KEY_PAGEDOWN,
 187         [0x92] = KEY_KP0,
 188         [0x94] = KEY_KPDOT,
 189         [0x95] = KEY_KPENTER,
 190         [0x96] = KEY_KP1,
 191         [0x97] = KEY_KP2,
 192         [0x98] = KEY_KP3,
 193         [0x99] = KEY_KP4,
 194         [0x9a] = KEY_KP5,
 195         [0x9b] = KEY_KP6,
 196         [0x9c] = KEY_KPCOMMA,
 197         [0x9d] = KEY_KP7,
 198         [0x9e] = KEY_KP8,
 199         [0x9f] = KEY_KP9,
 200         [0xa0] = KEY_KPMINUS,
 201         [0xa1] = KEY_PROG1,
 202         [0xa2] = KEY_PROG2,
 203         [0xa3] = KEY_PROG3,
 204         [0xa4] = KEY_PROG4,
 205         [0xa7] = KEY_LEFT,
 206         [0xa8] = KEY_RIGHT,
 207         [0xa9] = KEY_DOWN,
 208         [0xaa] = KEY_UP,
 209         [0xab] = KEY_RIGHTSHIFT,
 210         [0xac] = KEY_LEFTALT,
 211         [0xad] = KEY_COMPOSE, /* Right Compose, that is. */
 212         [0xae] = KEY_LEFTSHIFT, /* Same as KEY_RIGHTSHIFT on LK201 */
 213         [0xaf] = KEY_LEFTCTRL,
 214         [0xb0] = KEY_CAPSLOCK,
 215         [0xb1] = KEY_COMPOSE, /* Left Compose, that is. */
 216         [0xb2] = KEY_RIGHTALT,
 217         [0xbc] = KEY_BACKSPACE,
 218         [0xbd] = KEY_ENTER,
 219         [0xbe] = KEY_TAB,
 220         [0xbf] = KEY_ESC,
 221         [0xc0] = KEY_1,
 222         [0xc1] = KEY_Q,
 223         [0xc2] = KEY_A,
 224         [0xc3] = KEY_Z,
 225         [0xc5] = KEY_2,
 226         [0xc6] = KEY_W,
 227         [0xc7] = KEY_S,
 228         [0xc8] = KEY_X,
 229         [0xc9] = KEY_102ND,
 230         [0xcb] = KEY_3,
 231         [0xcc] = KEY_E,
 232         [0xcd] = KEY_D,
 233         [0xce] = KEY_C,
 234         [0xd0] = KEY_4,
 235         [0xd1] = KEY_R,
 236         [0xd2] = KEY_F,
 237         [0xd3] = KEY_V,
 238         [0xd4] = KEY_SPACE,
 239         [0xd6] = KEY_5,
 240         [0xd7] = KEY_T,
 241         [0xd8] = KEY_G,
 242         [0xd9] = KEY_B,
 243         [0xdb] = KEY_6,
 244         [0xdc] = KEY_Y,
 245         [0xdd] = KEY_H,
 246         [0xde] = KEY_N,
 247         [0xe0] = KEY_7,
 248         [0xe1] = KEY_U,
 249         [0xe2] = KEY_J,
 250         [0xe3] = KEY_M,
 251         [0xe5] = KEY_8,
 252         [0xe6] = KEY_I,
 253         [0xe7] = KEY_K,
 254         [0xe8] = KEY_COMMA,
 255         [0xea] = KEY_9,
 256         [0xeb] = KEY_O,
 257         [0xec] = KEY_L,
 258         [0xed] = KEY_DOT,
 259         [0xef] = KEY_0,
 260         [0xf0] = KEY_P,
 261         [0xf2] = KEY_SEMICOLON,
 262         [0xf3] = KEY_SLASH,
 263         [0xf5] = KEY_EQUAL,
 264         [0xf6] = KEY_RIGHTBRACE,
 265         [0xf7] = KEY_BACKSLASH,
 266         [0xf9] = KEY_MINUS,
 267         [0xfa] = KEY_LEFTBRACE,
 268         [0xfb] = KEY_APOSTROPHE,
 269 };
 270
 271 #define CHECK_LED(LK, VAR_ON, VAR_OFF, LED, BITS) do {          \
 272         if (test_bit (LED, (LK)->dev->led))                     \
 273                 VAR_ON |= BITS;                                 \
 274         else                                                    \
 275                 VAR_OFF |= BITS;                                \
 276         } while (0)
 277
 278 /*
 279  * Per-keyboard data
 280  */
 281 struct lkkbd {
 282         lk_keycode_t keycode[LK_NUM_KEYCODES];
 283         int ignore_bytes;
 284         unsigned char id[LK_NUM_IGNORE_BYTES];
 285         struct input_dev *dev;
 286         struct serio *serio;
 287         struct work_struct tq;
 288         char name[64];
 289         char phys[32];
 290         char type;
 291         int bell_volume;
 292         int keyclick_volume;
 293         int ctrlclick_volume;
 294 };
 295
 296 #ifdef LKKBD_DEBUG
 297 /*
 298  * Responses from the keyboard and mapping back to their names.
 299  */
 300 static struct {
 301         unsigned char value;
 302         unsigned char *name;
 303 } lk_response[] = {
 304 #define RESPONSE(x) { .value = (x), .name = #x, }
 305         RESPONSE (LK_STUCK_KEY),
 306         RESPONSE (LK_SELFTEST_FAILED),
 307         RESPONSE (LK_ALL_KEYS_UP),
 308         RESPONSE (LK_METRONOME),
 309         RESPONSE (LK_OUTPUT_ERROR),
 310         RESPONSE (LK_INPUT_ERROR),
 311         RESPONSE (LK_KBD_LOCKED),
 312         RESPONSE (LK_KBD_TEST_MODE_ACK),
 313         RESPONSE (LK_PREFIX_KEY_DOWN),
 314         RESPONSE (LK_MODE_CHANGE_ACK),
 315         RESPONSE (LK_RESPONSE_RESERVED),
 316 #undef RESPONSE
 317 };
 318
 319 static unsigned char *
 320 response_name (unsigned char value)
 321 {
 322         int i;
 323
 324         for (i = 0; i < ARRAY_SIZE (lk_response); i++)
 325                 if (lk_response[i].value == value)
 326                         return lk_response[i].name;
 327
 328         return "<unknown>";
 329 }
 330 #endif /* LKKBD_DEBUG */
 331
 332 /*
 333  * Calculate volume parameter byte for a given volume.
 334  */
 335 static unsigned char
 336 volume_to_hw (int volume_percent)
 337 {
 338         unsigned char ret = 0;
 339
 340         if (volume_percent < 0)
 341                 volume_percent = 0;
 342         if (volume_percent > 100)
 343                 volume_percent = 100;
 344
 345         if (volume_percent >= 0)
 346                 ret = 7;
 347         if (volume_percent >= 13)       /* 12.5 */
 348                 ret = 6;
 349         if (volume_percent >= 25)
 350                 ret = 5;
 351         if (volume_percent >= 38)       /* 37.5 */
 352                 ret = 4;
 353         if (volume_percent >= 50)
 354                 ret = 3;
 355         if (volume_percent >= 63)       /* 62.5 */
 356                 ret = 2;                /* This is the default volume */
 357         if (volume_percent >= 75)
 358                 ret = 1;
 359         if (volume_percent >= 88)       /* 87.5 */
 360                 ret = 0;
 361
 362         ret |= 0x80;
 363
 364         return ret;
 365 }
 366
 367 static void
 368 lkkbd_detection_done (struct lkkbd *lk)
 369 {
 370         int i;
 371
 372         /*
 373          * Reset setting for Compose key. Let Compose be KEY_COMPOSE.
 374          */
 375         lk->keycode[0xb1] = KEY_COMPOSE;
 376
 377         /*
 378          * Print keyboard name and modify Compose=Alt on user's request.
 379          */
 380         switch (lk->id[4]) {
 381                 case 1:
 382                         strlcpy (lk->name, "DEC LK201 keyboard",
 383                                  sizeof (lk->name));
 384
 385                         if (lk201_compose_is_alt)
 386                                 lk->keycode[0xb1] = KEY_LEFTALT;
 387                         break;
 388
 389                 case 2:
 390                         strlcpy (lk->name, "DEC LK401 keyboard",
 391                                  sizeof (lk->name));
 392                         break;
 393
 394                 default:
 395                         strlcpy (lk->name, "Unknown DEC keyboard",
 396                                  sizeof (lk->name));
 397                         printk (KERN_ERR "lkkbd: keyboard on %s is unknown, "
 398                                         "please report to Jan-Benedict Glaw "
 399                                         "<jbglaw@lug-owl.de>\n", lk->phys);
 400                         printk (KERN_ERR "lkkbd: keyboard ID'ed as:");
 401                         for (i = 0; i < LK_NUM_IGNORE_BYTES; i++)
 402                                 printk (" 0x%02x", lk->id[i]);
 403                         printk ("\n");
 404                         break;
 405         }
 406         printk (KERN_INFO "lkkbd: keyboard on %s identified as: %s\n",
 407                         lk->phys, lk->name);
 408
 409         /*
 410          * Report errors during keyboard boot-up.
 411          */
 412         switch (lk->id[2]) {
 413                 case 0x00:
 414                         /* All okay */
 415                         break;
 416
 417                 case LK_STUCK_KEY:
 418                         printk (KERN_ERR "lkkbd: Stuck key on keyboard at "
 419                                         "%s\n", lk->phys);
 420                         break;
 421
 422                 case LK_SELFTEST_FAILED:
 423                         printk (KERN_ERR "lkkbd: Selftest failed on keyboard "
 424                                         "at %s, keyboard may not work "
 425                                         "properly\n", lk->phys);
 426                         break;
 427
 428                 default:
 429                         printk (KERN_ERR "lkkbd: Unknown error %02x on "
 430                                         "keyboard at %s\n", lk->id[2],
 431                                         lk->phys);
 432                         break;
 433         }
 434
 435         /*
 436          * Try to hint user if there's a stuck key.
 437          */
 438         if (lk->id[2] == LK_STUCK_KEY && lk->id[3] != 0)
 439                 printk (KERN_ERR "Scancode of stuck key is 0x%02x, keycode "
 440                                 "is 0x%04x\n", lk->id[3],
 441                                 lk->keycode[lk->id[3]]);
 442
 443         return;
 444 }
 445
 446 /*
 447  * lkkbd_interrupt() is called by the low level driver when a character
 448  * is received.
 449  */
 450 static irqreturn_t
 451 lkkbd_interrupt (struct serio *serio, unsigned char data, unsigned int flags)
 452 {
 453         struct lkkbd *lk = serio_get_drvdata (serio);
 454         int i;
 455
 456         DBG (KERN_INFO "Got byte 0x%02x\n", data);
 457
 458         if (lk->ignore_bytes > 0) {
 459                 DBG (KERN_INFO "Ignoring a byte on %s\n", lk->name);
 460                 lk->id[LK_NUM_IGNORE_BYTES - lk->ignore_bytes--] = data;
 461
 462                 if (lk->ignore_bytes == 0)
 463                         lkkbd_detection_done (lk);
 464
 465                 return IRQ_HANDLED;
 466         }
 467
 468         switch (data) {
 469                 case LK_ALL_KEYS_UP:
 470                         for (i = 0; i < ARRAY_SIZE (lkkbd_keycode); i++)
 471                                 if (lk->keycode[i] != KEY_RESERVED)
 472                                         input_report_key (lk->dev, lk->keycode[i], 0);
 473                         input_sync (lk->dev);
 474                         break;
 475
 476                 case 0x01:
 477                         DBG (KERN_INFO "Got 0x01, scheduling re-initialization\n");
 478                         lk->ignore_bytes = LK_NUM_IGNORE_BYTES;
 479                         lk->id[LK_NUM_IGNORE_BYTES - lk->ignore_bytes--] = data;
 480                         schedule_work (&lk->tq);
 481                         break;
 482
 483                 case LK_METRONOME:
 484                 case LK_OUTPUT_ERROR:
 485                 case LK_INPUT_ERROR:
 486                 case LK_KBD_LOCKED:
 487                 case LK_KBD_TEST_MODE_ACK:
 488                 case LK_PREFIX_KEY_DOWN:
 489                 case LK_MODE_CHANGE_ACK:
 490                 case LK_RESPONSE_RESERVED:
 491                         DBG (KERN_INFO "Got %s and don't know how to handle...\n",
 492                                         response_name (data));
 493                         break;
 494
 495                 default:
 496                         if (lk->keycode[data] != KEY_RESERVED) {
 497                                 if (!test_bit (lk->keycode[data], lk->dev->key))
 498                                         input_report_key (lk->dev, lk->keycode[data], 1);
 499                                 else
 500                                         input_report_key (lk->dev, lk->keycode[data], 0);
 501                                 input_sync (lk->dev);
 502                         } else
 503                                 printk (KERN_WARNING "%s: Unknown key with "
 504                                                 "scancode 0x%02x on %s.\n",
 505                                                 __FILE__, data, lk->name);
 506         }
 507
 508         return IRQ_HANDLED;
 509 }
 510
 511 /*
 512  * lkkbd_event() handles events from the input module.
 513  */
 514 static int
 515 lkkbd_event (struct input_dev *dev, unsigned int type, unsigned int code,
 516                 int value)
 517 {
 518         struct lkkbd *lk = input_get_drvdata (dev);
 519         unsigned char leds_on = 0;
 520         unsigned char leds_off = 0;
 521
 522         switch (type) {
 523                 case EV_LED:
 524                         CHECK_LED (lk, leds_on, leds_off, LED_CAPSL, LK_LED_SHIFTLOCK);
 525                         CHECK_LED (lk, leds_on, leds_off, LED_COMPOSE, LK_LED_COMPOSE);
 526                         CHECK_LED (lk, leds_on, leds_off, LED_SCROLLL, LK_LED_SCROLLLOCK);
 527                         CHECK_LED (lk, leds_on, leds_off, LED_SLEEP, LK_LED_WAIT);
 528                         if (leds_on != 0) {
 529                                 lk->serio->write (lk->serio, LK_CMD_LED_ON);
 530                                 lk->serio->write (lk->serio, leds_on);
 531                         }
 532                         if (leds_off != 0) {
 533                                 lk->serio->write (lk->serio, LK_CMD_LED_OFF);
 534                                 lk->serio->write (lk->serio, leds_off);
 535                         }
 536                         return 0;
 537
 538                 case EV_SND:
 539                         switch (code) {
 540                                 case SND_CLICK:
 541                                         if (value == 0) {
 542                                                 DBG ("%s: Deactivating key clicks\n", __FUNCTION__);
 543                                                 lk->serio->write (lk->serio, LK_CMD_DISABLE_KEYCLICK);
 544                                                 lk->serio->write (lk->serio, LK_CMD_DISABLE_CTRCLICK);
 545                                         } else {
 546                                                 DBG ("%s: Activating key clicks\n", __FUNCTION__);
 547                                                 lk->serio->write (lk->serio, LK_CMD_ENABLE_KEYCLICK);
 548                                                 lk->serio->write (lk->serio, volume_to_hw (lk->keyclick_volume));
 549                                                 lk->serio->write (lk->serio, LK_CMD_ENABLE_CTRCLICK);
 550                                                 lk->serio->write (lk->serio, volume_to_hw (lk->ctrlclick_volume));
 551                                         }
 552                                         return 0;
 553
 554                                 case SND_BELL:
 555                                         if (value != 0)
 556                                                 lk->serio->write (lk->serio, LK_CMD_SOUND_BELL);
 557
 558                                         return 0;
 559                         }
 560                         break;
 561
 562                 default:
 563                         printk (KERN_ERR "%s (): Got unknown type %d, code %d, value %d\n",
 564                                         __FUNCTION__, type, code, value);
 565         }
 566
 567         return -1;
 568 }
 569
 570 /*
 571  * lkkbd_reinit() sets leds and beeps to a state the computer remembers they
 572  * were in.
 573  */
 574 static void
 575 lkkbd_reinit (struct work_struct *work)
 576 {
 577         struct lkkbd *lk = container_of(work, struct lkkbd, tq);
 578         int division;
 579         unsigned char leds_on = 0;
 580         unsigned char leds_off = 0;
 581
 582         /* Ask for ID */
 583         lk->serio->write (lk->serio, LK_CMD_REQUEST_ID);
 584
 585         /* Reset parameters */
 586         lk->serio->write (lk->serio, LK_CMD_SET_DEFAULTS);
 587
 588         /* Set LEDs */
 589         CHECK_LED (lk, leds_on, leds_off, LED_CAPSL, LK_LED_SHIFTLOCK);
 590         CHECK_LED (lk, leds_on, leds_off, LED_COMPOSE, LK_LED_COMPOSE);
 591         CHECK_LED (lk, leds_on, leds_off, LED_SCROLLL, LK_LED_SCROLLLOCK);
 592         CHECK_LED (lk, leds_on, leds_off, LED_SLEEP, LK_LED_WAIT);
 593         if (leds_on != 0) {
 594                 lk->serio->write (lk->serio, LK_CMD_LED_ON);
 595                 lk->serio->write (lk->serio, leds_on);
 596         }
 597         if (leds_off != 0) {
 598                 lk->serio->write (lk->serio, LK_CMD_LED_OFF);
 599                 lk->serio->write (lk->serio, leds_off);
 600         }
 601
 602         /*
 603          * Try to activate extended LK401 mode. This command will
 604          * only work with a LK401 keyboard and grants access to
 605          * LAlt, RAlt, RCompose and RShift.
 606          */
 607         lk->serio->write (lk->serio, LK_CMD_ENABLE_LK401);
 608
 609         /* Set all keys to UPDOWN mode */
 610         for (division = 1; division <= 14; division++)
 611                 lk->serio->write (lk->serio, LK_CMD_SET_MODE (LK_MODE_UPDOWN,
 612                                         division));
 613
 614         /* Enable bell and set volume */
 615         lk->serio->write (lk->serio, LK_CMD_ENABLE_BELL);
 616         lk->serio->write (lk->serio, volume_to_hw (lk->bell_volume));
 617
 618         /* Enable/disable keyclick (and possibly set volume) */
 619         if (test_bit (SND_CLICK, lk->dev->snd)) {
 620                 lk->serio->write (lk->serio, LK_CMD_ENABLE_KEYCLICK);
 621                 lk->serio->write (lk->serio, volume_to_hw (lk->keyclick_volume));
 622                 lk->serio->write (lk->serio, LK_CMD_ENABLE_CTRCLICK);
 623                 lk->serio->write (lk->serio, volume_to_hw (lk->ctrlclick_volume));
 624         } else {
 625                 lk->serio->write (lk->serio, LK_CMD_DISABLE_KEYCLICK);
 626                 lk->serio->write (lk->serio, LK_CMD_DISABLE_CTRCLICK);
 627         }
 628
 629         /* Sound the bell if needed */
 630         if (test_bit (SND_BELL, lk->dev->snd))
 631                 lk->serio->write (lk->serio, LK_CMD_SOUND_BELL);
 632 }
 633
 634 /*
 635  * lkkbd_connect() probes for a LK keyboard and fills the necessary structures.
 636  */
 637 static int
 638 lkkbd_connect (struct serio *serio, struct serio_driver *drv)
 639 {
 640         struct lkkbd *lk;
 641         struct input_dev *input_dev;
 642         int i;
 643         int err;
 644
 645         lk = kzalloc (sizeof (struct lkkbd), GFP_KERNEL);
 646         input_dev = input_allocate_device ();
 647         if (!lk || !input_dev) {
 648                 err = -ENOMEM;
 649                 goto fail1;
 650         }
 651
 652         lk->serio = serio;
 653         lk->dev = input_dev;
 654         INIT_WORK (&lk->tq, lkkbd_reinit);
 655         lk->bell_volume = bell_volume;
 656         lk->keyclick_volume = keyclick_volume;
 657         lk->ctrlclick_volume = ctrlclick_volume;
 658         memcpy (lk->keycode, lkkbd_keycode, sizeof (lk_keycode_t) * LK_NUM_KEYCODES);
 659
 660         strlcpy (lk->name, "DEC LK keyboard", sizeof(lk->name));
 661         snprintf (lk->phys, sizeof(lk->phys), "%s/input0", serio->phys);
 662
 663         input_dev->name = lk->name;
 664         input_dev->phys = lk->phys;
 665         input_dev->id.bustype = BUS_RS232;
 666         input_dev->id.vendor = SERIO_LKKBD;
 667         input_dev->id.product = 0;
 668         input_dev->id.version = 0x0100;
 669         input_dev->dev.parent = &serio->dev;
 670         input_dev->event = lkkbd_event;
 671
 672         input_set_drvdata (input_dev, lk);
 673
 674         set_bit (EV_KEY, input_dev->evbit);
 675         set_bit (EV_LED, input_dev->evbit);
 676         set_bit (EV_SND, input_dev->evbit);
 677         set_bit (EV_REP, input_dev->evbit);
 678         set_bit (LED_CAPSL, input_dev->ledbit);
 679         set_bit (LED_SLEEP, input_dev->ledbit);
 680         set_bit (LED_COMPOSE, input_dev->ledbit);
 681         set_bit (LED_SCROLLL, input_dev->ledbit);
 682         set_bit (SND_BELL, input_dev->sndbit);
 683         set_bit (SND_CLICK, input_dev->sndbit);
 684
 685         input_dev->keycode = lk->keycode;
 686         input_dev->keycodesize = sizeof (lk_keycode_t);
 687         input_dev->keycodemax = LK_NUM_KEYCODES;
 688         for (i = 0; i < LK_NUM_KEYCODES; i++)
 689                 set_bit (lk->keycode[i], input_dev->keybit);
 690
 691         serio_set_drvdata (serio, lk);
 692
 693         err = serio_open (serio, drv);
 694         if (err)
 695                 goto fail2;
 696
 697         err = input_register_device (lk->dev);
 698         if (err)
 699                 goto fail3;
 700
 701         lk->serio->write (lk->serio, LK_CMD_POWERCYCLE_RESET);
 702
 703         return 0;
 704
 705  fail3: serio_close (serio);
 706  fail2: serio_set_drvdata (serio, NULL);
 707  fail1: 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         return serio_register_driver(&lkkbd_drv);
 758 }
 759
 760 static void __exit
 761 lkkbd_exit (void)
 762 {
 763         serio_unregister_driver(&lkkbd_drv);
 764 }
 765
 766 module_init (lkkbd_init);
 767 module_exit (lkkbd_exit);
 768