release/src-rt-6.x.4708/linux/linux-2.6.36/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/interrupt.h>
  68 #include <linux/init.h>
  69 #include <linux/input.h>
  70 #include <linux/serio.h>
  71 #include <linux/workqueue.h>
  72
  73 #define DRIVER_DESC     "LK keyboard driver"
  74
  75 MODULE_AUTHOR("Jan-Benedict Glaw <jbglaw@lug-owl.de>");
  76 MODULE_DESCRIPTION(DRIVER_DESC);
  77 MODULE_LICENSE("GPL");
  78
  79 /*
  80  * Known parameters:
  81  *      bell_volume
  82  *      keyclick_volume
  83  *      ctrlclick_volume
  84  *
  85  * Please notice that there's not yet an API to set these at runtime.
  86  */
  87 static int bell_volume = 100; /* % */
  88 module_param(bell_volume, int, 0);
  89 MODULE_PARM_DESC(bell_volume, "Bell volume (in %). default is 100%");
  90
  91 static int keyclick_volume = 100; /* % */
  92 module_param(keyclick_volume, int, 0);
  93 MODULE_PARM_DESC(keyclick_volume, "Keyclick volume (in %), default is 100%");
  94
  95 static int ctrlclick_volume = 100; /* % */
  96 module_param(ctrlclick_volume, int, 0);
  97 MODULE_PARM_DESC(ctrlclick_volume, "Ctrlclick volume (in %), default is 100%");
  98
  99 static int lk201_compose_is_alt;
 100 module_param(lk201_compose_is_alt, int, 0);
 101 MODULE_PARM_DESC(lk201_compose_is_alt,
 102                  "If set non-zero, LK201' Compose key will act as an Alt key");
 103
 104
 105
 106 #undef LKKBD_DEBUG
 107 #ifdef LKKBD_DEBUG
 108 #define DBG(x...) printk(x)
 109 #else
 110 #define DBG(x...) do {} while (0)
 111 #endif
 112
 113 /* LED control */
 114 #define LK_LED_WAIT             0x81
 115 #define LK_LED_COMPOSE          0x82
 116 #define LK_LED_SHIFTLOCK        0x84
 117 #define LK_LED_SCROLLLOCK       0x88
 118 #define LK_CMD_LED_ON           0x13
 119 #define LK_CMD_LED_OFF          0x11
 120
 121 /* Mode control */
 122 #define LK_MODE_DOWN            0x80
 123 #define LK_MODE_AUTODOWN        0x82
 124 #define LK_MODE_UPDOWN          0x86
 125 #define LK_CMD_SET_MODE(mode, div)      ((mode) | ((div) << 3))
 126
 127 /* Misc commands */
 128 #define LK_CMD_ENABLE_KEYCLICK  0x1b
 129 #define LK_CMD_DISABLE_KEYCLICK 0x99
 130 #define LK_CMD_DISABLE_BELL     0xa1
 131 #define LK_CMD_SOUND_BELL       0xa7
 132 #define LK_CMD_ENABLE_BELL      0x23
 133 #define LK_CMD_DISABLE_CTRCLICK 0xb9
 134 #define LK_CMD_ENABLE_CTRCLICK  0xbb
 135 #define LK_CMD_SET_DEFAULTS     0xd3
 136 #define LK_CMD_POWERCYCLE_RESET 0xfd
 137 #define LK_CMD_ENABLE_LK401     0xe9
 138 #define LK_CMD_REQUEST_ID       0xab
 139
 140 /* Misc responses from keyboard */
 141 #define LK_STUCK_KEY            0x3d
 142 #define LK_SELFTEST_FAILED      0x3e
 143 #define LK_ALL_KEYS_UP          0xb3
 144 #define LK_METRONOME            0xb4
 145 #define LK_OUTPUT_ERROR         0xb5
 146 #define LK_INPUT_ERROR          0xb6
 147 #define LK_KBD_LOCKED           0xb7
 148 #define LK_KBD_TEST_MODE_ACK    0xb8
 149 #define LK_PREFIX_KEY_DOWN      0xb9
 150 #define LK_MODE_CHANGE_ACK      0xba
 151 #define LK_RESPONSE_RESERVED    0xbb
 152
 153 #define LK_NUM_KEYCODES         256
 154 #define LK_NUM_IGNORE_BYTES     6
 155
 156 static unsigned short lkkbd_keycode[LK_NUM_KEYCODES] = {
 157         [0x56] = KEY_F1,
 158         [0x57] = KEY_F2,
 159         [0x58] = KEY_F3,
 160         [0x59] = KEY_F4,
 161         [0x5a] = KEY_F5,
 162         [0x64] = KEY_F6,
 163         [0x65] = KEY_F7,
 164         [0x66] = KEY_F8,
 165         [0x67] = KEY_F9,
 166         [0x68] = KEY_F10,
 167         [0x71] = KEY_F11,
 168         [0x72] = KEY_F12,
 169         [0x73] = KEY_F13,
 170         [0x74] = KEY_F14,
 171         [0x7c] = KEY_F15,
 172         [0x7d] = KEY_F16,
 173         [0x80] = KEY_F17,
 174         [0x81] = KEY_F18,
 175         [0x82] = KEY_F19,
 176         [0x83] = KEY_F20,
 177         [0x8a] = KEY_FIND,
 178         [0x8b] = KEY_INSERT,
 179         [0x8c] = KEY_DELETE,
 180         [0x8d] = KEY_SELECT,
 181         [0x8e] = KEY_PAGEUP,
 182         [0x8f] = KEY_PAGEDOWN,
 183         [0x92] = KEY_KP0,
 184         [0x94] = KEY_KPDOT,
 185         [0x95] = KEY_KPENTER,
 186         [0x96] = KEY_KP1,
 187         [0x97] = KEY_KP2,
 188         [0x98] = KEY_KP3,
 189         [0x99] = KEY_KP4,
 190         [0x9a] = KEY_KP5,
 191         [0x9b] = KEY_KP6,
 192         [0x9c] = KEY_KPCOMMA,
 193         [0x9d] = KEY_KP7,
 194         [0x9e] = KEY_KP8,
 195         [0x9f] = KEY_KP9,
 196         [0xa0] = KEY_KPMINUS,
 197         [0xa1] = KEY_PROG1,
 198         [0xa2] = KEY_PROG2,
 199         [0xa3] = KEY_PROG3,
 200         [0xa4] = KEY_PROG4,
 201         [0xa7] = KEY_LEFT,
 202         [0xa8] = KEY_RIGHT,
 203         [0xa9] = KEY_DOWN,
 204         [0xaa] = KEY_UP,
 205         [0xab] = KEY_RIGHTSHIFT,
 206         [0xac] = KEY_LEFTALT,
 207         [0xad] = KEY_COMPOSE, /* Right Compose, that is. */
 208         [0xae] = KEY_LEFTSHIFT, /* Same as KEY_RIGHTSHIFT on LK201 */
 209         [0xaf] = KEY_LEFTCTRL,
 210         [0xb0] = KEY_CAPSLOCK,
 211         [0xb1] = KEY_COMPOSE, /* Left Compose, that is. */
 212         [0xb2] = KEY_RIGHTALT,
 213         [0xbc] = KEY_BACKSPACE,
 214         [0xbd] = KEY_ENTER,
 215         [0xbe] = KEY_TAB,
 216         [0xbf] = KEY_ESC,
 217         [0xc0] = KEY_1,
 218         [0xc1] = KEY_Q,
 219         [0xc2] = KEY_A,
 220         [0xc3] = KEY_Z,
 221         [0xc5] = KEY_2,
 222         [0xc6] = KEY_W,
 223         [0xc7] = KEY_S,
 224         [0xc8] = KEY_X,
 225         [0xc9] = KEY_102ND,
 226         [0xcb] = KEY_3,
 227         [0xcc] = KEY_E,
 228         [0xcd] = KEY_D,
 229         [0xce] = KEY_C,
 230         [0xd0] = KEY_4,
 231         [0xd1] = KEY_R,
 232         [0xd2] = KEY_F,
 233         [0xd3] = KEY_V,
 234         [0xd4] = KEY_SPACE,
 235         [0xd6] = KEY_5,
 236         [0xd7] = KEY_T,
 237         [0xd8] = KEY_G,
 238         [0xd9] = KEY_B,
 239         [0xdb] = KEY_6,
 240         [0xdc] = KEY_Y,
 241         [0xdd] = KEY_H,
 242         [0xde] = KEY_N,
 243         [0xe0] = KEY_7,
 244         [0xe1] = KEY_U,
 245         [0xe2] = KEY_J,
 246         [0xe3] = KEY_M,
 247         [0xe5] = KEY_8,
 248         [0xe6] = KEY_I,
 249         [0xe7] = KEY_K,
 250         [0xe8] = KEY_COMMA,
 251         [0xea] = KEY_9,
 252         [0xeb] = KEY_O,
 253         [0xec] = KEY_L,
 254         [0xed] = KEY_DOT,
 255         [0xef] = KEY_0,
 256         [0xf0] = KEY_P,
 257         [0xf2] = KEY_SEMICOLON,
 258         [0xf3] = KEY_SLASH,
 259         [0xf5] = KEY_EQUAL,
 260         [0xf6] = KEY_RIGHTBRACE,
 261         [0xf7] = KEY_BACKSLASH,
 262         [0xf9] = KEY_MINUS,
 263         [0xfa] = KEY_LEFTBRACE,
 264         [0xfb] = KEY_APOSTROPHE,
 265 };
 266
 267 #define CHECK_LED(LK, VAR_ON, VAR_OFF, LED, BITS) do {          \
 268         if (test_bit(LED, (LK)->dev->led))                      \
 269                 VAR_ON |= BITS;                                 \
 270         else                                                    \
 271                 VAR_OFF |= BITS;                                \
 272         } while (0)
 273
 274 /*
 275  * Per-keyboard data
 276  */
 277 struct lkkbd {
 278         unsigned short keycode[LK_NUM_KEYCODES];
 279         int ignore_bytes;
 280         unsigned char id[LK_NUM_IGNORE_BYTES];
 281         struct input_dev *dev;
 282         struct serio *serio;
 283         struct work_struct tq;
 284         char name[64];
 285         char phys[32];
 286         char type;
 287         int bell_volume;
 288         int keyclick_volume;
 289         int ctrlclick_volume;
 290 };
 291
 292 #ifdef LKKBD_DEBUG
 293 /*
 294  * Responses from the keyboard and mapping back to their names.
 295  */
 296 static struct {
 297         unsigned char value;
 298         unsigned char *name;
 299 } lk_response[] = {
 300 #define RESPONSE(x) { .value = (x), .name = #x, }
 301         RESPONSE(LK_STUCK_KEY),
 302         RESPONSE(LK_SELFTEST_FAILED),
 303         RESPONSE(LK_ALL_KEYS_UP),
 304         RESPONSE(LK_METRONOME),
 305         RESPONSE(LK_OUTPUT_ERROR),
 306         RESPONSE(LK_INPUT_ERROR),
 307         RESPONSE(LK_KBD_LOCKED),
 308         RESPONSE(LK_KBD_TEST_MODE_ACK),
 309         RESPONSE(LK_PREFIX_KEY_DOWN),
 310         RESPONSE(LK_MODE_CHANGE_ACK),
 311         RESPONSE(LK_RESPONSE_RESERVED),
 312 #undef RESPONSE
 313 };
 314
 315 static unsigned char *response_name(unsigned char value)
 316 {
 317         int i;
 318
 319         for (i = 0; i < ARRAY_SIZE(lk_response); i++)
 320                 if (lk_response[i].value == value)
 321                         return lk_response[i].name;
 322
 323         return "<unknown>";
 324 }
 325 #endif /* LKKBD_DEBUG */
 326
 327 /*
 328  * Calculate volume parameter byte for a given volume.
 329  */
 330 static unsigned char volume_to_hw(int volume_percent)
 331 {
 332         unsigned char ret = 0;
 333
 334         if (volume_percent < 0)
 335                 volume_percent = 0;
 336         if (volume_percent > 100)
 337                 volume_percent = 100;
 338
 339         if (volume_percent >= 0)
 340                 ret = 7;
 341         if (volume_percent >= 13)       /* 12.5 */
 342                 ret = 6;
 343         if (volume_percent >= 25)
 344                 ret = 5;
 345         if (volume_percent >= 38)       /* 37.5 */
 346                 ret = 4;
 347         if (volume_percent >= 50)
 348                 ret = 3;
 349         if (volume_percent >= 63)       /* 62.5 */
 350                 ret = 2;                /* This is the default volume */
 351         if (volume_percent >= 75)
 352                 ret = 1;
 353         if (volume_percent >= 88)       /* 87.5 */
 354                 ret = 0;
 355
 356         ret |= 0x80;
 357
 358         return ret;
 359 }
 360
 361 static void lkkbd_detection_done(struct lkkbd *lk)
 362 {
 363         int i;
 364
 365         /*
 366          * Reset setting for Compose key. Let Compose be KEY_COMPOSE.
 367          */
 368         lk->keycode[0xb1] = KEY_COMPOSE;
 369
 370         /*
 371          * Print keyboard name and modify Compose=Alt on user's request.
 372          */
 373         switch (lk->id[4]) {
 374         case 1:
 375                 strlcpy(lk->name, "DEC LK201 keyboard", sizeof(lk->name));
 376
 377                 if (lk201_compose_is_alt)
 378                         lk->keycode[0xb1] = KEY_LEFTALT;
 379                 break;
 380
 381         case 2:
 382                 strlcpy(lk->name, "DEC LK401 keyboard", sizeof(lk->name));
 383                 break;
 384
 385         default:
 386                 strlcpy(lk->name, "Unknown DEC keyboard", sizeof(lk->name));
 387                 printk(KERN_ERR
 388                         "lkkbd: keyboard on %s is unknown, please report to "
 389                         "Jan-Benedict Glaw <jbglaw@lug-owl.de>\n", lk->phys);
 390                 printk(KERN_ERR "lkkbd: keyboard ID'ed as:");
 391                 for (i = 0; i < LK_NUM_IGNORE_BYTES; i++)
 392                         printk(" 0x%02x", lk->id[i]);
 393                 printk("\n");
 394                 break;
 395         }
 396
 397         printk(KERN_INFO "lkkbd: keyboard on %s identified as: %s\n",
 398                 lk->phys, lk->name);
 399
 400         /*
 401          * Report errors during keyboard boot-up.
 402          */
 403         switch (lk->id[2]) {
 404         case 0x00:
 405                 /* All okay */
 406                 break;
 407
 408         case LK_STUCK_KEY:
 409                 printk(KERN_ERR "lkkbd: Stuck key on keyboard at %s\n",
 410                         lk->phys);
 411                 break;
 412
 413         case LK_SELFTEST_FAILED:
 414                 printk(KERN_ERR
 415                         "lkkbd: Selftest failed on keyboard at %s, "
 416                         "keyboard may not work properly\n", lk->phys);
 417                 break;
 418
 419         default:
 420                 printk(KERN_ERR
 421                         "lkkbd: Unknown error %02x on keyboard at %s\n",
 422                         lk->id[2], lk->phys);
 423                 break;
 424         }
 425
 426         /*
 427          * Try to hint user if there's a stuck key.
 428          */
 429         if (lk->id[2] == LK_STUCK_KEY && lk->id[3] != 0)
 430                 printk(KERN_ERR
 431                         "Scancode of stuck key is 0x%02x, keycode is 0x%04x\n",
 432                         lk->id[3], lk->keycode[lk->id[3]]);
 433 }
 434
 435 /*
 436  * lkkbd_interrupt() is called by the low level driver when a character
 437  * is received.
 438  */
 439 static irqreturn_t lkkbd_interrupt(struct serio *serio,
 440                                    unsigned char data, unsigned int flags)
 441 {
 442         struct lkkbd *lk = serio_get_drvdata(serio);
 443         struct input_dev *input_dev = lk->dev;
 444         unsigned int keycode;
 445         int i;
 446
 447         DBG(KERN_INFO "Got byte 0x%02x\n", data);
 448
 449         if (lk->ignore_bytes > 0) {
 450                 DBG(KERN_INFO "Ignoring a byte on %s\n", lk->name);
 451                 lk->id[LK_NUM_IGNORE_BYTES - lk->ignore_bytes--] = data;
 452
 453                 if (lk->ignore_bytes == 0)
 454                         lkkbd_detection_done(lk);
 455
 456                 return IRQ_HANDLED;
 457         }
 458
 459         switch (data) {
 460         case LK_ALL_KEYS_UP:
 461                 for (i = 0; i < ARRAY_SIZE(lkkbd_keycode); i++)
 462                         input_report_key(input_dev, lk->keycode[i], 0);
 463                 input_sync(input_dev);
 464                 break;
 465
 466         case 0x01:
 467                 DBG(KERN_INFO "Got 0x01, scheduling re-initialization\n");
 468                 lk->ignore_bytes = LK_NUM_IGNORE_BYTES;
 469                 lk->id[LK_NUM_IGNORE_BYTES - lk->ignore_bytes--] = data;
 470                 schedule_work(&lk->tq);
 471                 break;
 472
 473         case LK_METRONOME:
 474         case LK_OUTPUT_ERROR:
 475         case LK_INPUT_ERROR:
 476         case LK_KBD_LOCKED:
 477         case LK_KBD_TEST_MODE_ACK:
 478         case LK_PREFIX_KEY_DOWN:
 479         case LK_MODE_CHANGE_ACK:
 480         case LK_RESPONSE_RESERVED:
 481                 DBG(KERN_INFO "Got %s and don't know how to handle...\n",
 482                         response_name(data));
 483                 break;
 484
 485         default:
 486                 keycode = lk->keycode[data];
 487                 if (keycode != KEY_RESERVED) {
 488                         input_report_key(input_dev, keycode,
 489                                          !test_bit(keycode, input_dev->key));
 490                         input_sync(input_dev);
 491                 } else {
 492                         printk(KERN_WARNING
 493                                 "%s: Unknown key with scancode 0x%02x on %s.\n",
 494                                 __FILE__, data, lk->name);
 495                 }
 496         }
 497
 498         return IRQ_HANDLED;
 499 }
 500
 501 static void lkkbd_toggle_leds(struct lkkbd *lk)
 502 {
 503         struct serio *serio = lk->serio;
 504         unsigned char leds_on = 0;
 505         unsigned char leds_off = 0;
 506
 507         CHECK_LED(lk, leds_on, leds_off, LED_CAPSL, LK_LED_SHIFTLOCK);
 508         CHECK_LED(lk, leds_on, leds_off, LED_COMPOSE, LK_LED_COMPOSE);
 509         CHECK_LED(lk, leds_on, leds_off, LED_SCROLLL, LK_LED_SCROLLLOCK);
 510         CHECK_LED(lk, leds_on, leds_off, LED_SLEEP, LK_LED_WAIT);
 511         if (leds_on != 0) {
 512                 serio_write(serio, LK_CMD_LED_ON);
 513                 serio_write(serio, leds_on);
 514         }
 515         if (leds_off != 0) {
 516                 serio_write(serio, LK_CMD_LED_OFF);
 517                 serio_write(serio, leds_off);
 518         }
 519 }
 520
 521 static void lkkbd_toggle_keyclick(struct lkkbd *lk, bool on)
 522 {
 523         struct serio *serio = lk->serio;
 524
 525         if (on) {
 526                 DBG("%s: Activating key clicks\n", __func__);
 527                 serio_write(serio, LK_CMD_ENABLE_KEYCLICK);
 528                 serio_write(serio, volume_to_hw(lk->keyclick_volume));
 529                 serio_write(serio, LK_CMD_ENABLE_CTRCLICK);
 530                 serio_write(serio, volume_to_hw(lk->ctrlclick_volume));
 531         } else {
 532                 DBG("%s: Deactivating key clicks\n", __func__);
 533                 serio_write(serio, LK_CMD_DISABLE_KEYCLICK);
 534                 serio_write(serio, LK_CMD_DISABLE_CTRCLICK);
 535         }
 536
 537 }
 538
 539 /*
 540  * lkkbd_event() handles events from the input module.
 541  */
 542 static int lkkbd_event(struct input_dev *dev,
 543                         unsigned int type, unsigned int code, int value)
 544 {
 545         struct lkkbd *lk = input_get_drvdata(dev);
 546
 547         switch (type) {
 548         case EV_LED:
 549                 lkkbd_toggle_leds(lk);
 550                 return 0;
 551
 552         case EV_SND:
 553                 switch (code) {
 554                 case SND_CLICK:
 555                         lkkbd_toggle_keyclick(lk, value);
 556                         return 0;
 557
 558                 case SND_BELL:
 559                         if (value != 0)
 560                                 serio_write(lk->serio, LK_CMD_SOUND_BELL);
 561
 562                         return 0;
 563                 }
 564
 565                 break;
 566
 567         default:
 568                 printk(KERN_ERR "%s(): Got unknown type %d, code %d, value %d\n",
 569                         __func__, 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 lkkbd_reinit(struct work_struct *work)
 580 {
 581         struct lkkbd *lk = container_of(work, struct lkkbd, tq);
 582         int division;
 583
 584         /* Ask for ID */
 585         serio_write(lk->serio, LK_CMD_REQUEST_ID);
 586
 587         /* Reset parameters */
 588         serio_write(lk->serio, LK_CMD_SET_DEFAULTS);
 589
 590         /* Set LEDs */
 591         lkkbd_toggle_leds(lk);
 592
 593         /*
 594          * Try to activate extended LK401 mode. This command will
 595          * only work with a LK401 keyboard and grants access to
 596          * LAlt, RAlt, RCompose and RShift.
 597          */
 598         serio_write(lk->serio, LK_CMD_ENABLE_LK401);
 599
 600         /* Set all keys to UPDOWN mode */
 601         for (division = 1; division <= 14; division++)
 602                 serio_write(lk->serio,
 603                             LK_CMD_SET_MODE(LK_MODE_UPDOWN, division));
 604
 605         /* Enable bell and set volume */
 606         serio_write(lk->serio, LK_CMD_ENABLE_BELL);
 607         serio_write(lk->serio, volume_to_hw(lk->bell_volume));
 608
 609         /* Enable/disable keyclick (and possibly set volume) */
 610         lkkbd_toggle_keyclick(lk, test_bit(SND_CLICK, lk->dev->snd));
 611
 612         /* Sound the bell if needed */
 613         if (test_bit(SND_BELL, lk->dev->snd))
 614                 serio_write(lk->serio, LK_CMD_SOUND_BELL);
 615 }
 616
 617 /*
 618  * lkkbd_connect() probes for a LK keyboard and fills the necessary structures.
 619  */
 620 static int lkkbd_connect(struct serio *serio, struct serio_driver *drv)
 621 {
 622         struct lkkbd *lk;
 623         struct input_dev *input_dev;
 624         int i;
 625         int err;
 626
 627         lk = kzalloc(sizeof(struct lkkbd), GFP_KERNEL);
 628         input_dev = input_allocate_device();
 629         if (!lk || !input_dev) {
 630                 err = -ENOMEM;
 631                 goto fail1;
 632         }
 633
 634         lk->serio = serio;
 635         lk->dev = input_dev;
 636         INIT_WORK(&lk->tq, lkkbd_reinit);
 637         lk->bell_volume = bell_volume;
 638         lk->keyclick_volume = keyclick_volume;
 639         lk->ctrlclick_volume = ctrlclick_volume;
 640         memcpy(lk->keycode, lkkbd_keycode, sizeof(lk->keycode));
 641
 642         strlcpy(lk->name, "DEC LK keyboard", sizeof(lk->name));
 643         snprintf(lk->phys, sizeof(lk->phys), "%s/input0", serio->phys);
 644
 645         input_dev->name = lk->name;
 646         input_dev->phys = lk->phys;
 647         input_dev->id.bustype = BUS_RS232;
 648         input_dev->id.vendor = SERIO_LKKBD;
 649         input_dev->id.product = 0;
 650         input_dev->id.version = 0x0100;
 651         input_dev->dev.parent = &serio->dev;
 652         input_dev->event = lkkbd_event;
 653
 654         input_set_drvdata(input_dev, lk);
 655
 656         __set_bit(EV_KEY, input_dev->evbit);
 657         __set_bit(EV_LED, input_dev->evbit);
 658         __set_bit(EV_SND, input_dev->evbit);
 659         __set_bit(EV_REP, input_dev->evbit);
 660         __set_bit(LED_CAPSL, input_dev->ledbit);
 661         __set_bit(LED_SLEEP, input_dev->ledbit);
 662         __set_bit(LED_COMPOSE, input_dev->ledbit);
 663         __set_bit(LED_SCROLLL, input_dev->ledbit);
 664         __set_bit(SND_BELL, input_dev->sndbit);
 665         __set_bit(SND_CLICK, input_dev->sndbit);
 666
 667         input_dev->keycode = lk->keycode;
 668         input_dev->keycodesize = sizeof(lk->keycode[0]);
 669         input_dev->keycodemax = ARRAY_SIZE(lk->keycode);
 670
 671         for (i = 0; i < LK_NUM_KEYCODES; i++)
 672                 __set_bit(lk->keycode[i], input_dev->keybit);
 673         __clear_bit(KEY_RESERVED, input_dev->keybit);
 674
 675         serio_set_drvdata(serio, lk);
 676
 677         err = serio_open(serio, drv);
 678         if (err)
 679                 goto fail2;
 680
 681         err = input_register_device(lk->dev);
 682         if (err)
 683                 goto fail3;
 684
 685         serio_write(lk->serio, LK_CMD_POWERCYCLE_RESET);
 686
 687         return 0;
 688
 689  fail3: serio_close(serio);
 690  fail2: serio_set_drvdata(serio, NULL);
 691  fail1: input_free_device(input_dev);
 692         kfree(lk);
 693         return err;
 694 }
 695
 696 /*
 697  * lkkbd_disconnect() unregisters and closes behind us.
 698  */
 699 static void lkkbd_disconnect(struct serio *serio)
 700 {
 701         struct lkkbd *lk = serio_get_drvdata(serio);
 702
 703         input_get_device(lk->dev);
 704         input_unregister_device(lk->dev);
 705         serio_close(serio);
 706         serio_set_drvdata(serio, NULL);
 707         input_put_device(lk->dev);
 708         kfree(lk);
 709 }
 710
 711 static struct serio_device_id lkkbd_serio_ids[] = {
 712         {
 713                 .type   = SERIO_RS232,
 714                 .proto  = SERIO_LKKBD,
 715                 .id     = SERIO_ANY,
 716                 .extra  = SERIO_ANY,
 717         },
 718         { 0 }
 719 };
 720
 721 MODULE_DEVICE_TABLE(serio, lkkbd_serio_ids);
 722
 723 static struct serio_driver lkkbd_drv = {
 724         .driver         = {
 725                 .name   = "lkkbd",
 726         },
 727         .description    = DRIVER_DESC,
 728         .id_table       = lkkbd_serio_ids,
 729         .connect        = lkkbd_connect,
 730         .disconnect     = lkkbd_disconnect,
 731         .interrupt      = lkkbd_interrupt,
 732 };
 733
 734 /*
 735  * The functions for insering/removing us as a module.
 736  */
 737 static int __init lkkbd_init(void)
 738 {
 739         return serio_register_driver(&lkkbd_drv);
 740 }
 741
 742 static void __exit lkkbd_exit(void)
 743 {
 744         serio_unregister_driver(&lkkbd_drv);
 745 }
 746
 747 module_init(lkkbd_init);
 748 module_exit(lkkbd_exit);