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