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
62 MODULE_AUTHOR("Jan-Benedict Glaw <jbglaw@lug-owl.de>");
63 MODULE_DESCRIPTION(DRIVER_DESC);
64 MODULE_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 */
74 static int bell_volume = 100; /* % */
75 module_param(bell_volume, int, 0);
76 MODULE_PARM_DESC(bell_volume, "Bell volume (in %). default is 100%");
77
78 static int keyclick_volume = 100; /* % */
79 module_param(keyclick_volume, int, 0);
80 MODULE_PARM_DESC(keyclick_volume, "Keyclick volume (in %), default is 100%");
81
82 static int ctrlclick_volume = 100; /* % */
83 module_param(ctrlclick_volume, int, 0);
84 MODULE_PARM_DESC(ctrlclick_volume, "Ctrlclick volume (in %), default is 100%");
85
86 static int lk201_compose_is_alt;
87 module_param(lk201_compose_is_alt, int, 0);
88 MODULE_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
143 static 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 */
264 struct 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 */
283 static 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
response_name(unsigned char value)302 static 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 */
volume_to_hw(int volume_percent)317 static 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
lkkbd_detection_done(struct lkkbd * lk)348 static 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 */
lkkbd_interrupt(struct serio * serio,unsigned char data,unsigned int flags)426 static 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
lkkbd_toggle_leds(struct lkkbd * lk)488 static 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
lkkbd_toggle_keyclick(struct lkkbd * lk,bool on)508 static 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 */
lkkbd_event(struct input_dev * dev,unsigned int type,unsigned int code,int value)529 static 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 */
lkkbd_reinit(struct work_struct * work)566 static 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 */
lkkbd_connect(struct serio * serio,struct serio_driver * drv)607 static 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 */
lkkbd_disconnect(struct serio * serio)686 static 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
698 static 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
708 MODULE_DEVICE_TABLE(serio, lkkbd_serio_ids);
709
710 static 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
721 module_serio_driver(lkkbd_drv);
722