1// SPDX-License-Identifier: GPL-2.0-or-later 2/* 3 * Copyright (C) 2004 by Jan-Benedict Glaw <jbglaw@lug-owl.de> 4 */ 5 6/* 7 * LK keyboard driver for Linux, based on sunkbd.c (C) by Vojtech Pavlik 8 */ 9 10/* 11 * DEC LK201 and LK401 keyboard driver for Linux (primary for DECstations 12 * and VAXstations, but can also be used on any standard RS232 with an 13 * adaptor). 14 * 15 * DISCLAIMER: This works for _me_. If you break anything by using the 16 * information given below, I will _not_ be liable! 17 * 18 * RJ10 pinout: To DE9: Or DB25: 19 * 1 - RxD <----> Pin 3 (TxD) <-> Pin 2 (TxD) 20 * 2 - GND <----> Pin 5 (GND) <-> Pin 7 (GND) 21 * 4 - TxD <----> Pin 2 (RxD) <-> Pin 3 (RxD) 22 * 3 - +12V (from HDD drive connector), DON'T connect to DE9 or DB25!!! 23 * 24 * Pin numbers for DE9 and DB25 are noted on the plug (quite small:). For 25 * RJ10, it's like this: 26 * 27 * __=__ Hold the plug in front of you, cable downwards, 28 * /___/| nose is hidden behind the plug. Now, pin 1 is at 29 * |1234|| the left side, pin 4 at the right and 2 and 3 are 30 * |IIII|| in between, of course:) 31 * | || 32 * |____|/ 33 * || So the adaptor consists of three connected cables 34 * || for data transmission (RxD and TxD) and signal ground. 35 * Additionally, you have to get +12V from somewhere. 36 * Most easily, you'll get that from a floppy or HDD power connector. 37 * It's the yellow cable there (black is ground and red is +5V). 38 * 39 * The keyboard and all the commands it understands are documented in 40 * "VCB02 Video Subsystem - Technical Manual", EK-104AA-TM-001. This 41 * document is LK201 specific, but LK401 is mostly compatible. It comes 42 * up in LK201 mode and doesn't report any of the additional keys it 43 * has. These need to be switched on with the LK_CMD_ENABLE_LK401 44 * command. You'll find this document (scanned .pdf file) on MANX, 45 * a search engine specific to DEC documentation. Try 46 * http://www.vt100.net/manx/details?pn=EK-104AA-TM-001;id=21;cp=1 47 */ 48 49/* 50 */ 51 52#include <linux/delay.h> 53#include <linux/slab.h> 54#include <linux/module.h> 55#include <linux/interrupt.h> 56#include <linux/input.h> 57#include <linux/serio.h> 58#include <linux/workqueue.h> 59 60#define DRIVER_DESC "LK keyboard driver" 61 62MODULE_AUTHOR("Jan-Benedict Glaw <jbglaw@lug-owl.de>"); 63MODULE_DESCRIPTION(DRIVER_DESC); 64MODULE_LICENSE("GPL"); 65 66/* 67 * Known parameters: 68 * bell_volume 69 * keyclick_volume 70 * ctrlclick_volume 71 * 72 * Please notice that there's not yet an API to set these at runtime. 73 */ 74static int bell_volume = 100; /* % */ 75module_param(bell_volume, int, 0); 76MODULE_PARM_DESC(bell_volume, "Bell volume (in %). default is 100%"); 77 78static int keyclick_volume = 100; /* % */ 79module_param(keyclick_volume, int, 0); 80MODULE_PARM_DESC(keyclick_volume, "Keyclick volume (in %), default is 100%"); 81 82static int ctrlclick_volume = 100; /* % */ 83module_param(ctrlclick_volume, int, 0); 84MODULE_PARM_DESC(ctrlclick_volume, "Ctrlclick volume (in %), default is 100%"); 85 86static int lk201_compose_is_alt; 87module_param(lk201_compose_is_alt, int, 0); 88MODULE_PARM_DESC(lk201_compose_is_alt, 89 "If set non-zero, LK201' Compose key will act as an Alt key"); 90 91 92 93#undef LKKBD_DEBUG 94#ifdef LKKBD_DEBUG 95#define DBG(x...) printk(x) 96#else 97#define DBG(x...) do {} while (0) 98#endif 99 100/* LED control */ 101#define LK_LED_WAIT 0x81 102#define LK_LED_COMPOSE 0x82 103#define LK_LED_SHIFTLOCK 0x84 104#define LK_LED_SCROLLLOCK 0x88 105#define LK_CMD_LED_ON 0x13 106#define LK_CMD_LED_OFF 0x11 107 108/* Mode control */ 109#define LK_MODE_DOWN 0x80 110#define LK_MODE_AUTODOWN 0x82 111#define LK_MODE_UPDOWN 0x86 112#define LK_CMD_SET_MODE(mode, div) ((mode) | ((div) << 3)) 113 114/* Misc commands */ 115#define LK_CMD_ENABLE_KEYCLICK 0x1b 116#define LK_CMD_DISABLE_KEYCLICK 0x99 117#define LK_CMD_DISABLE_BELL 0xa1 118#define LK_CMD_SOUND_BELL 0xa7 119#define LK_CMD_ENABLE_BELL 0x23 120#define LK_CMD_DISABLE_CTRCLICK 0xb9 121#define LK_CMD_ENABLE_CTRCLICK 0xbb 122#define LK_CMD_SET_DEFAULTS 0xd3 123#define LK_CMD_POWERCYCLE_RESET 0xfd 124#define LK_CMD_ENABLE_LK401 0xe9 125#define LK_CMD_REQUEST_ID 0xab 126 127/* Misc responses from keyboard */ 128#define LK_STUCK_KEY 0x3d 129#define LK_SELFTEST_FAILED 0x3e 130#define LK_ALL_KEYS_UP 0xb3 131#define LK_METRONOME 0xb4 132#define LK_OUTPUT_ERROR 0xb5 133#define LK_INPUT_ERROR 0xb6 134#define LK_KBD_LOCKED 0xb7 135#define LK_KBD_TEST_MODE_ACK 0xb8 136#define LK_PREFIX_KEY_DOWN 0xb9 137#define LK_MODE_CHANGE_ACK 0xba 138#define LK_RESPONSE_RESERVED 0xbb 139 140#define LK_NUM_KEYCODES 256 141#define LK_NUM_IGNORE_BYTES 6 142 143static unsigned short lkkbd_keycode[LK_NUM_KEYCODES] = { 144 [0x56] = KEY_F1, 145 [0x57] = KEY_F2, 146 [0x58] = KEY_F3, 147 [0x59] = KEY_F4, 148 [0x5a] = KEY_F5, 149 [0x64] = KEY_F6, 150 [0x65] = KEY_F7, 151 [0x66] = KEY_F8, 152 [0x67] = KEY_F9, 153 [0x68] = KEY_F10, 154 [0x71] = KEY_F11, 155 [0x72] = KEY_F12, 156 [0x73] = KEY_F13, 157 [0x74] = KEY_F14, 158 [0x7c] = KEY_F15, 159 [0x7d] = KEY_F16, 160 [0x80] = KEY_F17, 161 [0x81] = KEY_F18, 162 [0x82] = KEY_F19, 163 [0x83] = KEY_F20, 164 [0x8a] = KEY_FIND, 165 [0x8b] = KEY_INSERT, 166 [0x8c] = KEY_DELETE, 167 [0x8d] = KEY_SELECT, 168 [0x8e] = KEY_PAGEUP, 169 [0x8f] = KEY_PAGEDOWN, 170 [0x92] = KEY_KP0, 171 [0x94] = KEY_KPDOT, 172 [0x95] = KEY_KPENTER, 173 [0x96] = KEY_KP1, 174 [0x97] = KEY_KP2, 175 [0x98] = KEY_KP3, 176 [0x99] = KEY_KP4, 177 [0x9a] = KEY_KP5, 178 [0x9b] = KEY_KP6, 179 [0x9c] = KEY_KPCOMMA, 180 [0x9d] = KEY_KP7, 181 [0x9e] = KEY_KP8, 182 [0x9f] = KEY_KP9, 183 [0xa0] = KEY_KPMINUS, 184 [0xa1] = KEY_PROG1, 185 [0xa2] = KEY_PROG2, 186 [0xa3] = KEY_PROG3, 187 [0xa4] = KEY_PROG4, 188 [0xa7] = KEY_LEFT, 189 [0xa8] = KEY_RIGHT, 190 [0xa9] = KEY_DOWN, 191 [0xaa] = KEY_UP, 192 [0xab] = KEY_RIGHTSHIFT, 193 [0xac] = KEY_LEFTALT, 194 [0xad] = KEY_COMPOSE, /* Right Compose, that is. */ 195 [0xae] = KEY_LEFTSHIFT, /* Same as KEY_RIGHTSHIFT on LK201 */ 196 [0xaf] = KEY_LEFTCTRL, 197 [0xb0] = KEY_CAPSLOCK, 198 [0xb1] = KEY_COMPOSE, /* Left Compose, that is. */ 199 [0xb2] = KEY_RIGHTALT, 200 [0xbc] = KEY_BACKSPACE, 201 [0xbd] = KEY_ENTER, 202 [0xbe] = KEY_TAB, 203 [0xbf] = KEY_ESC, 204 [0xc0] = KEY_1, 205 [0xc1] = KEY_Q, 206 [0xc2] = KEY_A, 207 [0xc3] = KEY_Z, 208 [0xc5] = KEY_2, 209 [0xc6] = KEY_W, 210 [0xc7] = KEY_S, 211 [0xc8] = KEY_X, 212 [0xc9] = KEY_102ND, 213 [0xcb] = KEY_3, 214 [0xcc] = KEY_E, 215 [0xcd] = KEY_D, 216 [0xce] = KEY_C, 217 [0xd0] = KEY_4, 218 [0xd1] = KEY_R, 219 [0xd2] = KEY_F, 220 [0xd3] = KEY_V, 221 [0xd4] = KEY_SPACE, 222 [0xd6] = KEY_5, 223 [0xd7] = KEY_T, 224 [0xd8] = KEY_G, 225 [0xd9] = KEY_B, 226 [0xdb] = KEY_6, 227 [0xdc] = KEY_Y, 228 [0xdd] = KEY_H, 229 [0xde] = KEY_N, 230 [0xe0] = KEY_7, 231 [0xe1] = KEY_U, 232 [0xe2] = KEY_J, 233 [0xe3] = KEY_M, 234 [0xe5] = KEY_8, 235 [0xe6] = KEY_I, 236 [0xe7] = KEY_K, 237 [0xe8] = KEY_COMMA, 238 [0xea] = KEY_9, 239 [0xeb] = KEY_O, 240 [0xec] = KEY_L, 241 [0xed] = KEY_DOT, 242 [0xef] = KEY_0, 243 [0xf0] = KEY_P, 244 [0xf2] = KEY_SEMICOLON, 245 [0xf3] = KEY_SLASH, 246 [0xf5] = KEY_EQUAL, 247 [0xf6] = KEY_RIGHTBRACE, 248 [0xf7] = KEY_BACKSLASH, 249 [0xf9] = KEY_MINUS, 250 [0xfa] = KEY_LEFTBRACE, 251 [0xfb] = KEY_APOSTROPHE, 252}; 253 254#define CHECK_LED(LK, VAR_ON, VAR_OFF, LED, BITS) do { \ 255 if (test_bit(LED, (LK)->dev->led)) \ 256 VAR_ON |= BITS; \ 257 else \ 258 VAR_OFF |= BITS; \ 259 } while (0) 260 261/* 262 * Per-keyboard data 263 */ 264struct lkkbd { 265 unsigned short keycode[LK_NUM_KEYCODES]; 266 int ignore_bytes; 267 unsigned char id[LK_NUM_IGNORE_BYTES]; 268 struct input_dev *dev; 269 struct serio *serio; 270 struct work_struct tq; 271 char name[64]; 272 char phys[32]; 273 char type; 274 int bell_volume; 275 int keyclick_volume; 276 int ctrlclick_volume; 277}; 278 279#ifdef LKKBD_DEBUG 280/* 281 * Responses from the keyboard and mapping back to their names. 282 */ 283static struct { 284 unsigned char value; 285 unsigned char *name; 286} lk_response[] = { 287#define RESPONSE(x) { .value = (x), .name = #x, } 288 RESPONSE(LK_STUCK_KEY), 289 RESPONSE(LK_SELFTEST_FAILED), 290 RESPONSE(LK_ALL_KEYS_UP), 291 RESPONSE(LK_METRONOME), 292 RESPONSE(LK_OUTPUT_ERROR), 293 RESPONSE(LK_INPUT_ERROR), 294 RESPONSE(LK_KBD_LOCKED), 295 RESPONSE(LK_KBD_TEST_MODE_ACK), 296 RESPONSE(LK_PREFIX_KEY_DOWN), 297 RESPONSE(LK_MODE_CHANGE_ACK), 298 RESPONSE(LK_RESPONSE_RESERVED), 299#undef RESPONSE 300}; 301 302static unsigned char *response_name(unsigned char value) 303{ 304 int i; 305 306 for (i = 0; i < ARRAY_SIZE(lk_response); i++) 307 if (lk_response[i].value == value) 308 return lk_response[i].name; 309 310 return "<unknown>"; 311} 312#endif /* LKKBD_DEBUG */ 313 314/* 315 * Calculate volume parameter byte for a given volume. 316 */ 317static unsigned char volume_to_hw(int volume_percent) 318{ 319 unsigned char ret = 0; 320 321 if (volume_percent < 0) 322 volume_percent = 0; 323 if (volume_percent > 100) 324 volume_percent = 100; 325 326 if (volume_percent >= 0) 327 ret = 7; 328 if (volume_percent >= 13) /* 12.5 */ 329 ret = 6; 330 if (volume_percent >= 25) 331 ret = 5; 332 if (volume_percent >= 38) /* 37.5 */ 333 ret = 4; 334 if (volume_percent >= 50) 335 ret = 3; 336 if (volume_percent >= 63) /* 62.5 */ 337 ret = 2; /* This is the default volume */ 338 if (volume_percent >= 75) 339 ret = 1; 340 if (volume_percent >= 88) /* 87.5 */ 341 ret = 0; 342 343 ret |= 0x80; 344 345 return ret; 346} 347 348static void lkkbd_detection_done(struct lkkbd *lk) 349{ 350 int i; 351 352 /* 353 * Reset setting for Compose key. Let Compose be KEY_COMPOSE. 354 */ 355 lk->keycode[0xb1] = KEY_COMPOSE; 356 357 /* 358 * Print keyboard name and modify Compose=Alt on user's request. 359 */ 360 switch (lk->id[4]) { 361 case 1: 362 strlcpy(lk->name, "DEC LK201 keyboard", sizeof(lk->name)); 363 364 if (lk201_compose_is_alt) 365 lk->keycode[0xb1] = KEY_LEFTALT; 366 break; 367 368 case 2: 369 strlcpy(lk->name, "DEC LK401 keyboard", sizeof(lk->name)); 370 break; 371 372 default: 373 strlcpy(lk->name, "Unknown DEC keyboard", sizeof(lk->name)); 374 printk(KERN_ERR 375 "lkkbd: keyboard on %s is unknown, please report to " 376 "Jan-Benedict Glaw <jbglaw@lug-owl.de>\n", lk->phys); 377 printk(KERN_ERR "lkkbd: keyboard ID'ed as:"); 378 for (i = 0; i < LK_NUM_IGNORE_BYTES; i++) 379 printk(" 0x%02x", lk->id[i]); 380 printk("\n"); 381 break; 382 } 383 384 printk(KERN_INFO "lkkbd: keyboard on %s identified as: %s\n", 385 lk->phys, lk->name); 386 387 /* 388 * Report errors during keyboard boot-up. 389 */ 390 switch (lk->id[2]) { 391 case 0x00: 392 /* All okay */ 393 break; 394 395 case LK_STUCK_KEY: 396 printk(KERN_ERR "lkkbd: Stuck key on keyboard at %s\n", 397 lk->phys); 398 break; 399 400 case LK_SELFTEST_FAILED: 401 printk(KERN_ERR 402 "lkkbd: Selftest failed on keyboard at %s, " 403 "keyboard may not work properly\n", lk->phys); 404 break; 405 406 default: 407 printk(KERN_ERR 408 "lkkbd: Unknown error %02x on keyboard at %s\n", 409 lk->id[2], lk->phys); 410 break; 411 } 412 413 /* 414 * Try to hint user if there's a stuck key. 415 */ 416 if (lk->id[2] == LK_STUCK_KEY && lk->id[3] != 0) 417 printk(KERN_ERR 418 "Scancode of stuck key is 0x%02x, keycode is 0x%04x\n", 419 lk->id[3], lk->keycode[lk->id[3]]); 420} 421 422/* 423 * lkkbd_interrupt() is called by the low level driver when a character 424 * is received. 425 */ 426static irqreturn_t lkkbd_interrupt(struct serio *serio, 427 unsigned char data, unsigned int flags) 428{ 429 struct lkkbd *lk = serio_get_drvdata(serio); 430 struct input_dev *input_dev = lk->dev; 431 unsigned int keycode; 432 int i; 433 434 DBG(KERN_INFO "Got byte 0x%02x\n", data); 435 436 if (lk->ignore_bytes > 0) { 437 DBG(KERN_INFO "Ignoring a byte on %s\n", lk->name); 438 lk->id[LK_NUM_IGNORE_BYTES - lk->ignore_bytes--] = data; 439 440 if (lk->ignore_bytes == 0) 441 lkkbd_detection_done(lk); 442 443 return IRQ_HANDLED; 444 } 445 446 switch (data) { 447 case LK_ALL_KEYS_UP: 448 for (i = 0; i < ARRAY_SIZE(lkkbd_keycode); i++) 449 input_report_key(input_dev, lk->keycode[i], 0); 450 input_sync(input_dev); 451 break; 452 453 case 0x01: 454 DBG(KERN_INFO "Got 0x01, scheduling re-initialization\n"); 455 lk->ignore_bytes = LK_NUM_IGNORE_BYTES; 456 lk->id[LK_NUM_IGNORE_BYTES - lk->ignore_bytes--] = data; 457 schedule_work(&lk->tq); 458 break; 459 460 case LK_METRONOME: 461 case LK_OUTPUT_ERROR: 462 case LK_INPUT_ERROR: 463 case LK_KBD_LOCKED: 464 case LK_KBD_TEST_MODE_ACK: 465 case LK_PREFIX_KEY_DOWN: 466 case LK_MODE_CHANGE_ACK: 467 case LK_RESPONSE_RESERVED: 468 DBG(KERN_INFO "Got %s and don't know how to handle...\n", 469 response_name(data)); 470 break; 471 472 default: 473 keycode = lk->keycode[data]; 474 if (keycode != KEY_RESERVED) { 475 input_report_key(input_dev, keycode, 476 !test_bit(keycode, input_dev->key)); 477 input_sync(input_dev); 478 } else { 479 printk(KERN_WARNING 480 "%s: Unknown key with scancode 0x%02x on %s.\n", 481 __FILE__, data, lk->name); 482 } 483 } 484 485 return IRQ_HANDLED; 486} 487 488static void lkkbd_toggle_leds(struct lkkbd *lk) 489{ 490 struct serio *serio = lk->serio; 491 unsigned char leds_on = 0; 492 unsigned char leds_off = 0; 493 494 CHECK_LED(lk, leds_on, leds_off, LED_CAPSL, LK_LED_SHIFTLOCK); 495 CHECK_LED(lk, leds_on, leds_off, LED_COMPOSE, LK_LED_COMPOSE); 496 CHECK_LED(lk, leds_on, leds_off, LED_SCROLLL, LK_LED_SCROLLLOCK); 497 CHECK_LED(lk, leds_on, leds_off, LED_SLEEP, LK_LED_WAIT); 498 if (leds_on != 0) { 499 serio_write(serio, LK_CMD_LED_ON); 500 serio_write(serio, leds_on); 501 } 502 if (leds_off != 0) { 503 serio_write(serio, LK_CMD_LED_OFF); 504 serio_write(serio, leds_off); 505 } 506} 507 508static void lkkbd_toggle_keyclick(struct lkkbd *lk, bool on) 509{ 510 struct serio *serio = lk->serio; 511 512 if (on) { 513 DBG("%s: Activating key clicks\n", __func__); 514 serio_write(serio, LK_CMD_ENABLE_KEYCLICK); 515 serio_write(serio, volume_to_hw(lk->keyclick_volume)); 516 serio_write(serio, LK_CMD_ENABLE_CTRCLICK); 517 serio_write(serio, volume_to_hw(lk->ctrlclick_volume)); 518 } else { 519 DBG("%s: Deactivating key clicks\n", __func__); 520 serio_write(serio, LK_CMD_DISABLE_KEYCLICK); 521 serio_write(serio, LK_CMD_DISABLE_CTRCLICK); 522 } 523 524} 525 526/* 527 * lkkbd_event() handles events from the input module. 528 */ 529static int lkkbd_event(struct input_dev *dev, 530 unsigned int type, unsigned int code, int value) 531{ 532 struct lkkbd *lk = input_get_drvdata(dev); 533 534 switch (type) { 535 case EV_LED: 536 lkkbd_toggle_leds(lk); 537 return 0; 538 539 case EV_SND: 540 switch (code) { 541 case SND_CLICK: 542 lkkbd_toggle_keyclick(lk, value); 543 return 0; 544 545 case SND_BELL: 546 if (value != 0) 547 serio_write(lk->serio, LK_CMD_SOUND_BELL); 548 549 return 0; 550 } 551 552 break; 553 554 default: 555 printk(KERN_ERR "%s(): Got unknown type %d, code %d, value %d\n", 556 __func__, type, code, value); 557 } 558 559 return -1; 560} 561 562/* 563 * lkkbd_reinit() sets leds and beeps to a state the computer remembers they 564 * were in. 565 */ 566static void lkkbd_reinit(struct work_struct *work) 567{ 568 struct lkkbd *lk = container_of(work, struct lkkbd, tq); 569 int division; 570 571 /* Ask for ID */ 572 serio_write(lk->serio, LK_CMD_REQUEST_ID); 573 574 /* Reset parameters */ 575 serio_write(lk->serio, LK_CMD_SET_DEFAULTS); 576 577 /* Set LEDs */ 578 lkkbd_toggle_leds(lk); 579 580 /* 581 * Try to activate extended LK401 mode. This command will 582 * only work with a LK401 keyboard and grants access to 583 * LAlt, RAlt, RCompose and RShift. 584 */ 585 serio_write(lk->serio, LK_CMD_ENABLE_LK401); 586 587 /* Set all keys to UPDOWN mode */ 588 for (division = 1; division <= 14; division++) 589 serio_write(lk->serio, 590 LK_CMD_SET_MODE(LK_MODE_UPDOWN, division)); 591 592 /* Enable bell and set volume */ 593 serio_write(lk->serio, LK_CMD_ENABLE_BELL); 594 serio_write(lk->serio, volume_to_hw(lk->bell_volume)); 595 596 /* Enable/disable keyclick (and possibly set volume) */ 597 lkkbd_toggle_keyclick(lk, test_bit(SND_CLICK, lk->dev->snd)); 598 599 /* Sound the bell if needed */ 600 if (test_bit(SND_BELL, lk->dev->snd)) 601 serio_write(lk->serio, LK_CMD_SOUND_BELL); 602} 603 604/* 605 * lkkbd_connect() probes for a LK keyboard and fills the necessary structures. 606 */ 607static int lkkbd_connect(struct serio *serio, struct serio_driver *drv) 608{ 609 struct lkkbd *lk; 610 struct input_dev *input_dev; 611 int i; 612 int err; 613 614 lk = kzalloc(sizeof(struct lkkbd), GFP_KERNEL); 615 input_dev = input_allocate_device(); 616 if (!lk || !input_dev) { 617 err = -ENOMEM; 618 goto fail1; 619 } 620 621 lk->serio = serio; 622 lk->dev = input_dev; 623 INIT_WORK(&lk->tq, lkkbd_reinit); 624 lk->bell_volume = bell_volume; 625 lk->keyclick_volume = keyclick_volume; 626 lk->ctrlclick_volume = ctrlclick_volume; 627 memcpy(lk->keycode, lkkbd_keycode, sizeof(lk->keycode)); 628 629 strlcpy(lk->name, "DEC LK keyboard", sizeof(lk->name)); 630 snprintf(lk->phys, sizeof(lk->phys), "%s/input0", serio->phys); 631 632 input_dev->name = lk->name; 633 input_dev->phys = lk->phys; 634 input_dev->id.bustype = BUS_RS232; 635 input_dev->id.vendor = SERIO_LKKBD; 636 input_dev->id.product = 0; 637 input_dev->id.version = 0x0100; 638 input_dev->dev.parent = &serio->dev; 639 input_dev->event = lkkbd_event; 640 641 input_set_drvdata(input_dev, lk); 642 643 __set_bit(EV_KEY, input_dev->evbit); 644 __set_bit(EV_LED, input_dev->evbit); 645 __set_bit(EV_SND, input_dev->evbit); 646 __set_bit(EV_REP, input_dev->evbit); 647 __set_bit(LED_CAPSL, input_dev->ledbit); 648 __set_bit(LED_SLEEP, input_dev->ledbit); 649 __set_bit(LED_COMPOSE, input_dev->ledbit); 650 __set_bit(LED_SCROLLL, input_dev->ledbit); 651 __set_bit(SND_BELL, input_dev->sndbit); 652 __set_bit(SND_CLICK, input_dev->sndbit); 653 654 input_dev->keycode = lk->keycode; 655 input_dev->keycodesize = sizeof(lk->keycode[0]); 656 input_dev->keycodemax = ARRAY_SIZE(lk->keycode); 657 658 for (i = 0; i < LK_NUM_KEYCODES; i++) 659 __set_bit(lk->keycode[i], input_dev->keybit); 660 __clear_bit(KEY_RESERVED, input_dev->keybit); 661 662 serio_set_drvdata(serio, lk); 663 664 err = serio_open(serio, drv); 665 if (err) 666 goto fail2; 667 668 err = input_register_device(lk->dev); 669 if (err) 670 goto fail3; 671 672 serio_write(lk->serio, LK_CMD_POWERCYCLE_RESET); 673 674 return 0; 675 676 fail3: serio_close(serio); 677 fail2: serio_set_drvdata(serio, NULL); 678 fail1: input_free_device(input_dev); 679 kfree(lk); 680 return err; 681} 682 683/* 684 * lkkbd_disconnect() unregisters and closes behind us. 685 */ 686static void lkkbd_disconnect(struct serio *serio) 687{ 688 struct lkkbd *lk = serio_get_drvdata(serio); 689 690 input_get_device(lk->dev); 691 input_unregister_device(lk->dev); 692 serio_close(serio); 693 serio_set_drvdata(serio, NULL); 694 input_put_device(lk->dev); 695 kfree(lk); 696} 697 698static const struct serio_device_id lkkbd_serio_ids[] = { 699 { 700 .type = SERIO_RS232, 701 .proto = SERIO_LKKBD, 702 .id = SERIO_ANY, 703 .extra = SERIO_ANY, 704 }, 705 { 0 } 706}; 707 708MODULE_DEVICE_TABLE(serio, lkkbd_serio_ids); 709 710static struct serio_driver lkkbd_drv = { 711 .driver = { 712 .name = "lkkbd", 713 }, 714 .description = DRIVER_DESC, 715 .id_table = lkkbd_serio_ids, 716 .connect = lkkbd_connect, 717 .disconnect = lkkbd_disconnect, 718 .interrupt = lkkbd_interrupt, 719}; 720 721module_serio_driver(lkkbd_drv); 722