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
response_name(unsigned char value)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 */
volume_to_hw(int volume_percent)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
lkkbd_detection_done(struct lkkbd * lk)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 */
lkkbd_interrupt(struct serio * serio,unsigned char data,unsigned int flags)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
lkkbd_toggle_leds(struct lkkbd * lk)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
lkkbd_toggle_keyclick(struct lkkbd * lk,bool on)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 */
lkkbd_event(struct input_dev * dev,unsigned int type,unsigned int code,int value)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 */
lkkbd_reinit(struct work_struct * work)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 */
lkkbd_connect(struct serio * serio,struct serio_driver * drv)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(struct lkkbd), 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 */
lkkbd_disconnect(struct serio * serio)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