Version:  2.0.40 2.2.26 2.4.37 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 3.10 3.11 3.12 3.13 3.14 3.15 3.16 3.17 3.18

Linux/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/input.h>
 69 #include <linux/serio.h>
 70 #include <linux/workqueue.h>
 71 
 72 #define DRIVER_DESC     "LK keyboard driver"
 73 
 74 MODULE_AUTHOR("Jan-Benedict Glaw <jbglaw@lug-owl.de>");
 75 MODULE_DESCRIPTION(DRIVER_DESC);
 76 MODULE_LICENSE("GPL");
 77 
 78 /*
 79  * Known parameters:
 80  *      bell_volume
 81  *      keyclick_volume
 82  *      ctrlclick_volume
 83  *
 84  * Please notice that there's not yet an API to set these at runtime.
 85  */
 86 static int bell_volume = 100; /* % */
 87 module_param(bell_volume, int, 0);
 88 MODULE_PARM_DESC(bell_volume, "Bell volume (in %). default is 100%");
 89 
 90 static int keyclick_volume = 100; /* % */
 91 module_param(keyclick_volume, int, 0);
 92 MODULE_PARM_DESC(keyclick_volume, "Keyclick volume (in %), default is 100%");
 93 
 94 static int ctrlclick_volume = 100; /* % */
 95 module_param(ctrlclick_volume, int, 0);
 96 MODULE_PARM_DESC(ctrlclick_volume, "Ctrlclick volume (in %), default is 100%");
 97 
 98 static int lk201_compose_is_alt;
 99 module_param(lk201_compose_is_alt, int, 0);
100 MODULE_PARM_DESC(lk201_compose_is_alt,
101                  "If set non-zero, LK201' Compose key will act as an Alt key");
102 
103 
104 
105 #undef LKKBD_DEBUG
106 #ifdef LKKBD_DEBUG
107 #define DBG(x...) printk(x)
108 #else
109 #define DBG(x...) do {} while (0)
110 #endif
111 
112 /* LED control */
113 #define LK_LED_WAIT             0x81
114 #define LK_LED_COMPOSE          0x82
115 #define LK_LED_SHIFTLOCK        0x84
116 #define LK_LED_SCROLLLOCK       0x88
117 #define LK_CMD_LED_ON           0x13
118 #define LK_CMD_LED_OFF          0x11
119 
120 /* Mode control */
121 #define LK_MODE_DOWN            0x80
122 #define LK_MODE_AUTODOWN        0x82
123 #define LK_MODE_UPDOWN          0x86
124 #define LK_CMD_SET_MODE(mode, div)      ((mode) | ((div) << 3))
125 
126 /* Misc commands */
127 #define LK_CMD_ENABLE_KEYCLICK  0x1b
128 #define LK_CMD_DISABLE_KEYCLICK 0x99
129 #define LK_CMD_DISABLE_BELL     0xa1
130 #define LK_CMD_SOUND_BELL       0xa7
131 #define LK_CMD_ENABLE_BELL      0x23
132 #define LK_CMD_DISABLE_CTRCLICK 0xb9
133 #define LK_CMD_ENABLE_CTRCLICK  0xbb
134 #define LK_CMD_SET_DEFAULTS     0xd3
135 #define LK_CMD_POWERCYCLE_RESET 0xfd
136 #define LK_CMD_ENABLE_LK401     0xe9
137 #define LK_CMD_REQUEST_ID       0xab
138 
139 /* Misc responses from keyboard */
140 #define LK_STUCK_KEY            0x3d
141 #define LK_SELFTEST_FAILED      0x3e
142 #define LK_ALL_KEYS_UP          0xb3
143 #define LK_METRONOME            0xb4
144 #define LK_OUTPUT_ERROR         0xb5
145 #define LK_INPUT_ERROR          0xb6
146 #define LK_KBD_LOCKED           0xb7
147 #define LK_KBD_TEST_MODE_ACK    0xb8
148 #define LK_PREFIX_KEY_DOWN      0xb9
149 #define LK_MODE_CHANGE_ACK      0xba
150 #define LK_RESPONSE_RESERVED    0xbb
151 
152 #define LK_NUM_KEYCODES         256
153 #define LK_NUM_IGNORE_BYTES     6
154 
155 static unsigned short lkkbd_keycode[LK_NUM_KEYCODES] = {
156         [0x56] = KEY_F1,
157         [0x57] = KEY_F2,
158         [0x58] = KEY_F3,
159         [0x59] = KEY_F4,
160         [0x5a] = KEY_F5,
161         [0x64] = KEY_F6,
162         [0x65] = KEY_F7,
163         [0x66] = KEY_F8,
164         [0x67] = KEY_F9,
165         [0x68] = KEY_F10,
166         [0x71] = KEY_F11,
167         [0x72] = KEY_F12,
168         [0x73] = KEY_F13,
169         [0x74] = KEY_F14,
170         [0x7c] = KEY_F15,
171         [0x7d] = KEY_F16,
172         [0x80] = KEY_F17,
173         [0x81] = KEY_F18,
174         [0x82] = KEY_F19,
175         [0x83] = KEY_F20,
176         [0x8a] = KEY_FIND,
177         [0x8b] = KEY_INSERT,
178         [0x8c] = KEY_DELETE,
179         [0x8d] = KEY_SELECT,
180         [0x8e] = KEY_PAGEUP,
181         [0x8f] = KEY_PAGEDOWN,
182         [0x92] = KEY_KP0,
183         [0x94] = KEY_KPDOT,
184         [0x95] = KEY_KPENTER,
185         [0x96] = KEY_KP1,
186         [0x97] = KEY_KP2,
187         [0x98] = KEY_KP3,
188         [0x99] = KEY_KP4,
189         [0x9a] = KEY_KP5,
190         [0x9b] = KEY_KP6,
191         [0x9c] = KEY_KPCOMMA,
192         [0x9d] = KEY_KP7,
193         [0x9e] = KEY_KP8,
194         [0x9f] = KEY_KP9,
195         [0xa0] = KEY_KPMINUS,
196         [0xa1] = KEY_PROG1,
197         [0xa2] = KEY_PROG2,
198         [0xa3] = KEY_PROG3,
199         [0xa4] = KEY_PROG4,
200         [0xa7] = KEY_LEFT,
201         [0xa8] = KEY_RIGHT,
202         [0xa9] = KEY_DOWN,
203         [0xaa] = KEY_UP,
204         [0xab] = KEY_RIGHTSHIFT,
205         [0xac] = KEY_LEFTALT,
206         [0xad] = KEY_COMPOSE, /* Right Compose, that is. */
207         [0xae] = KEY_LEFTSHIFT, /* Same as KEY_RIGHTSHIFT on LK201 */
208         [0xaf] = KEY_LEFTCTRL,
209         [0xb0] = KEY_CAPSLOCK,
210         [0xb1] = KEY_COMPOSE, /* Left Compose, that is. */
211         [0xb2] = KEY_RIGHTALT,
212         [0xbc] = KEY_BACKSPACE,
213         [0xbd] = KEY_ENTER,
214         [0xbe] = KEY_TAB,
215         [0xbf] = KEY_ESC,
216         [0xc0] = KEY_1,
217         [0xc1] = KEY_Q,
218         [0xc2] = KEY_A,
219         [0xc3] = KEY_Z,
220         [0xc5] = KEY_2,
221         [0xc6] = KEY_W,
222         [0xc7] = KEY_S,
223         [0xc8] = KEY_X,
224         [0xc9] = KEY_102ND,
225         [0xcb] = KEY_3,
226         [0xcc] = KEY_E,
227         [0xcd] = KEY_D,
228         [0xce] = KEY_C,
229         [0xd0] = KEY_4,
230         [0xd1] = KEY_R,
231         [0xd2] = KEY_F,
232         [0xd3] = KEY_V,
233         [0xd4] = KEY_SPACE,
234         [0xd6] = KEY_5,
235         [0xd7] = KEY_T,
236         [0xd8] = KEY_G,
237         [0xd9] = KEY_B,
238         [0xdb] = KEY_6,
239         [0xdc] = KEY_Y,
240         [0xdd] = KEY_H,
241         [0xde] = KEY_N,
242         [0xe0] = KEY_7,
243         [0xe1] = KEY_U,
244         [0xe2] = KEY_J,
245         [0xe3] = KEY_M,
246         [0xe5] = KEY_8,
247         [0xe6] = KEY_I,
248         [0xe7] = KEY_K,
249         [0xe8] = KEY_COMMA,
250         [0xea] = KEY_9,
251         [0xeb] = KEY_O,
252         [0xec] = KEY_L,
253         [0xed] = KEY_DOT,
254         [0xef] = KEY_0,
255         [0xf0] = KEY_P,
256         [0xf2] = KEY_SEMICOLON,
257         [0xf3] = KEY_SLASH,
258         [0xf5] = KEY_EQUAL,
259         [0xf6] = KEY_RIGHTBRACE,
260         [0xf7] = KEY_BACKSLASH,
261         [0xf9] = KEY_MINUS,
262         [0xfa] = KEY_LEFTBRACE,
263         [0xfb] = KEY_APOSTROPHE,
264 };
265 
266 #define CHECK_LED(LK, VAR_ON, VAR_OFF, LED, BITS) do {          \
267         if (test_bit(LED, (LK)->dev->led))                      \
268                 VAR_ON |= BITS;                                 \
269         else                                                    \
270                 VAR_OFF |= BITS;                                \
271         } while (0)
272 
273 /*
274  * Per-keyboard data
275  */
276 struct lkkbd {
277         unsigned short keycode[LK_NUM_KEYCODES];
278         int ignore_bytes;
279         unsigned char id[LK_NUM_IGNORE_BYTES];
280         struct input_dev *dev;
281         struct serio *serio;
282         struct work_struct tq;
283         char name[64];
284         char phys[32];
285         char type;
286         int bell_volume;
287         int keyclick_volume;
288         int ctrlclick_volume;
289 };
290 
291 #ifdef LKKBD_DEBUG
292 /*
293  * Responses from the keyboard and mapping back to their names.
294  */
295 static struct {
296         unsigned char value;
297         unsigned char *name;
298 } lk_response[] = {
299 #define RESPONSE(x) { .value = (x), .name = #x, }
300         RESPONSE(LK_STUCK_KEY),
301         RESPONSE(LK_SELFTEST_FAILED),
302         RESPONSE(LK_ALL_KEYS_UP),
303         RESPONSE(LK_METRONOME),
304         RESPONSE(LK_OUTPUT_ERROR),
305         RESPONSE(LK_INPUT_ERROR),
306         RESPONSE(LK_KBD_LOCKED),
307         RESPONSE(LK_KBD_TEST_MODE_ACK),
308         RESPONSE(LK_PREFIX_KEY_DOWN),
309         RESPONSE(LK_MODE_CHANGE_ACK),
310         RESPONSE(LK_RESPONSE_RESERVED),
311 #undef RESPONSE
312 };
313 
314 static unsigned char *response_name(unsigned char value)
315 {
316         int i;
317 
318         for (i = 0; i < ARRAY_SIZE(lk_response); i++)
319                 if (lk_response[i].value == value)
320                         return lk_response[i].name;
321 
322         return "<unknown>";
323 }
324 #endif /* LKKBD_DEBUG */
325 
326 /*
327  * Calculate volume parameter byte for a given volume.
328  */
329 static unsigned char volume_to_hw(int volume_percent)
330 {
331         unsigned char ret = 0;
332 
333         if (volume_percent < 0)
334                 volume_percent = 0;
335         if (volume_percent > 100)
336                 volume_percent = 100;
337 
338         if (volume_percent >= 0)
339                 ret = 7;
340         if (volume_percent >= 13)       /* 12.5 */
341                 ret = 6;
342         if (volume_percent >= 25)
343                 ret = 5;
344         if (volume_percent >= 38)       /* 37.5 */
345                 ret = 4;
346         if (volume_percent >= 50)
347                 ret = 3;
348         if (volume_percent >= 63)       /* 62.5 */
349                 ret = 2;                /* This is the default volume */
350         if (volume_percent >= 75)
351                 ret = 1;
352         if (volume_percent >= 88)       /* 87.5 */
353                 ret = 0;
354 
355         ret |= 0x80;
356 
357         return ret;
358 }
359 
360 static void lkkbd_detection_done(struct lkkbd *lk)
361 {
362         int i;
363 
364         /*
365          * Reset setting for Compose key. Let Compose be KEY_COMPOSE.
366          */
367         lk->keycode[0xb1] = KEY_COMPOSE;
368 
369         /*
370          * Print keyboard name and modify Compose=Alt on user's request.
371          */
372         switch (lk->id[4]) {
373         case 1:
374                 strlcpy(lk->name, "DEC LK201 keyboard", sizeof(lk->name));
375 
376                 if (lk201_compose_is_alt)
377                         lk->keycode[0xb1] = KEY_LEFTALT;
378                 break;
379 
380         case 2:
381                 strlcpy(lk->name, "DEC LK401 keyboard", sizeof(lk->name));
382                 break;
383 
384         default:
385                 strlcpy(lk->name, "Unknown DEC keyboard", sizeof(lk->name));
386                 printk(KERN_ERR
387                         "lkkbd: keyboard on %s is unknown, please report to "
388                         "Jan-Benedict Glaw <jbglaw@lug-owl.de>\n", lk->phys);
389                 printk(KERN_ERR "lkkbd: keyboard ID'ed as:");
390                 for (i = 0; i < LK_NUM_IGNORE_BYTES; i++)
391                         printk(" 0x%02x", lk->id[i]);
392                 printk("\n");
393                 break;
394         }
395 
396         printk(KERN_INFO "lkkbd: keyboard on %s identified as: %s\n",
397                 lk->phys, lk->name);
398 
399         /*
400          * Report errors during keyboard boot-up.
401          */
402         switch (lk->id[2]) {
403         case 0x00:
404                 /* All okay */
405                 break;
406 
407         case LK_STUCK_KEY:
408                 printk(KERN_ERR "lkkbd: Stuck key on keyboard at %s\n",
409                         lk->phys);
410                 break;
411 
412         case LK_SELFTEST_FAILED:
413                 printk(KERN_ERR
414                         "lkkbd: Selftest failed on keyboard at %s, "
415                         "keyboard may not work properly\n", lk->phys);
416                 break;
417 
418         default:
419                 printk(KERN_ERR
420                         "lkkbd: Unknown error %02x on keyboard at %s\n",
421                         lk->id[2], lk->phys);
422                 break;
423         }
424 
425         /*
426          * Try to hint user if there's a stuck key.
427          */
428         if (lk->id[2] == LK_STUCK_KEY && lk->id[3] != 0)
429                 printk(KERN_ERR
430                         "Scancode of stuck key is 0x%02x, keycode is 0x%04x\n",
431                         lk->id[3], lk->keycode[lk->id[3]]);
432 }
433 
434 /*
435  * lkkbd_interrupt() is called by the low level driver when a character
436  * is received.
437  */
438 static irqreturn_t lkkbd_interrupt(struct serio *serio,
439                                    unsigned char data, unsigned int flags)
440 {
441         struct lkkbd *lk = serio_get_drvdata(serio);
442         struct input_dev *input_dev = lk->dev;
443         unsigned int keycode;
444         int i;
445 
446         DBG(KERN_INFO "Got byte 0x%02x\n", data);
447 
448         if (lk->ignore_bytes > 0) {
449                 DBG(KERN_INFO "Ignoring a byte on %s\n", lk->name);
450                 lk->id[LK_NUM_IGNORE_BYTES - lk->ignore_bytes--] = data;
451 
452                 if (lk->ignore_bytes == 0)
453                         lkkbd_detection_done(lk);
454 
455                 return IRQ_HANDLED;
456         }
457 
458         switch (data) {
459         case LK_ALL_KEYS_UP:
460                 for (i = 0; i < ARRAY_SIZE(lkkbd_keycode); i++)
461                         input_report_key(input_dev, lk->keycode[i], 0);
462                 input_sync(input_dev);
463                 break;
464 
465         case 0x01:
466                 DBG(KERN_INFO "Got 0x01, scheduling re-initialization\n");
467                 lk->ignore_bytes = LK_NUM_IGNORE_BYTES;
468                 lk->id[LK_NUM_IGNORE_BYTES - lk->ignore_bytes--] = data;
469                 schedule_work(&lk->tq);
470                 break;
471 
472         case LK_METRONOME:
473         case LK_OUTPUT_ERROR:
474         case LK_INPUT_ERROR:
475         case LK_KBD_LOCKED:
476         case LK_KBD_TEST_MODE_ACK:
477         case LK_PREFIX_KEY_DOWN:
478         case LK_MODE_CHANGE_ACK:
479         case LK_RESPONSE_RESERVED:
480                 DBG(KERN_INFO "Got %s and don't know how to handle...\n",
481                         response_name(data));
482                 break;
483 
484         default:
485                 keycode = lk->keycode[data];
486                 if (keycode != KEY_RESERVED) {
487                         input_report_key(input_dev, keycode,
488                                          !test_bit(keycode, input_dev->key));
489                         input_sync(input_dev);
490                 } else {
491                         printk(KERN_WARNING
492                                 "%s: Unknown key with scancode 0x%02x on %s.\n",
493                                 __FILE__, data, lk->name);
494                 }
495         }
496 
497         return IRQ_HANDLED;
498 }
499 
500 static void lkkbd_toggle_leds(struct lkkbd *lk)
501 {
502         struct serio *serio = lk->serio;
503         unsigned char leds_on = 0;
504         unsigned char leds_off = 0;
505 
506         CHECK_LED(lk, leds_on, leds_off, LED_CAPSL, LK_LED_SHIFTLOCK);
507         CHECK_LED(lk, leds_on, leds_off, LED_COMPOSE, LK_LED_COMPOSE);
508         CHECK_LED(lk, leds_on, leds_off, LED_SCROLLL, LK_LED_SCROLLLOCK);
509         CHECK_LED(lk, leds_on, leds_off, LED_SLEEP, LK_LED_WAIT);
510         if (leds_on != 0) {
511                 serio_write(serio, LK_CMD_LED_ON);
512                 serio_write(serio, leds_on);
513         }
514         if (leds_off != 0) {
515                 serio_write(serio, LK_CMD_LED_OFF);
516                 serio_write(serio, leds_off);
517         }
518 }
519 
520 static void lkkbd_toggle_keyclick(struct lkkbd *lk, bool on)
521 {
522         struct serio *serio = lk->serio;
523 
524         if (on) {
525                 DBG("%s: Activating key clicks\n", __func__);
526                 serio_write(serio, LK_CMD_ENABLE_KEYCLICK);
527                 serio_write(serio, volume_to_hw(lk->keyclick_volume));
528                 serio_write(serio, LK_CMD_ENABLE_CTRCLICK);
529                 serio_write(serio, volume_to_hw(lk->ctrlclick_volume));
530         } else {
531                 DBG("%s: Deactivating key clicks\n", __func__);
532                 serio_write(serio, LK_CMD_DISABLE_KEYCLICK);
533                 serio_write(serio, LK_CMD_DISABLE_CTRCLICK);
534         }
535 
536 }
537 
538 /*
539  * lkkbd_event() handles events from the input module.
540  */
541 static int lkkbd_event(struct input_dev *dev,
542                         unsigned int type, unsigned int code, int value)
543 {
544         struct lkkbd *lk = input_get_drvdata(dev);
545 
546         switch (type) {
547         case EV_LED:
548                 lkkbd_toggle_leds(lk);
549                 return 0;
550 
551         case EV_SND:
552                 switch (code) {
553                 case SND_CLICK:
554                         lkkbd_toggle_keyclick(lk, value);
555                         return 0;
556 
557                 case SND_BELL:
558                         if (value != 0)
559                                 serio_write(lk->serio, LK_CMD_SOUND_BELL);
560 
561                         return 0;
562                 }
563 
564                 break;
565 
566         default:
567                 printk(KERN_ERR "%s(): Got unknown type %d, code %d, value %d\n",
568                         __func__, type, code, value);
569         }
570 
571         return -1;
572 }
573 
574 /*
575  * lkkbd_reinit() sets leds and beeps to a state the computer remembers they
576  * were in.
577  */
578 static void lkkbd_reinit(struct work_struct *work)
579 {
580         struct lkkbd *lk = container_of(work, struct lkkbd, tq);
581         int division;
582 
583         /* Ask for ID */
584         serio_write(lk->serio, LK_CMD_REQUEST_ID);
585 
586         /* Reset parameters */
587         serio_write(lk->serio, LK_CMD_SET_DEFAULTS);
588 
589         /* Set LEDs */
590         lkkbd_toggle_leds(lk);
591 
592         /*
593          * Try to activate extended LK401 mode. This command will
594          * only work with a LK401 keyboard and grants access to
595          * LAlt, RAlt, RCompose and RShift.
596          */
597         serio_write(lk->serio, LK_CMD_ENABLE_LK401);
598 
599         /* Set all keys to UPDOWN mode */
600         for (division = 1; division <= 14; division++)
601                 serio_write(lk->serio,
602                             LK_CMD_SET_MODE(LK_MODE_UPDOWN, division));
603 
604         /* Enable bell and set volume */
605         serio_write(lk->serio, LK_CMD_ENABLE_BELL);
606         serio_write(lk->serio, volume_to_hw(lk->bell_volume));
607 
608         /* Enable/disable keyclick (and possibly set volume) */
609         lkkbd_toggle_keyclick(lk, test_bit(SND_CLICK, lk->dev->snd));
610 
611         /* Sound the bell if needed */
612         if (test_bit(SND_BELL, lk->dev->snd))
613                 serio_write(lk->serio, LK_CMD_SOUND_BELL);
614 }
615 
616 /*
617  * lkkbd_connect() probes for a LK keyboard and fills the necessary structures.
618  */
619 static int lkkbd_connect(struct serio *serio, struct serio_driver *drv)
620 {
621         struct lkkbd *lk;
622         struct input_dev *input_dev;
623         int i;
624         int err;
625 
626         lk = kzalloc(sizeof(struct lkkbd), GFP_KERNEL);
627         input_dev = input_allocate_device();
628         if (!lk || !input_dev) {
629                 err = -ENOMEM;
630                 goto fail1;
631         }
632 
633         lk->serio = serio;
634         lk->dev = input_dev;
635         INIT_WORK(&lk->tq, lkkbd_reinit);
636         lk->bell_volume = bell_volume;
637         lk->keyclick_volume = keyclick_volume;
638         lk->ctrlclick_volume = ctrlclick_volume;
639         memcpy(lk->keycode, lkkbd_keycode, sizeof(lk->keycode));
640 
641         strlcpy(lk->name, "DEC LK keyboard", sizeof(lk->name));
642         snprintf(lk->phys, sizeof(lk->phys), "%s/input0", serio->phys);
643 
644         input_dev->name = lk->name;
645         input_dev->phys = lk->phys;
646         input_dev->id.bustype = BUS_RS232;
647         input_dev->id.vendor = SERIO_LKKBD;
648         input_dev->id.product = 0;
649         input_dev->id.version = 0x0100;
650         input_dev->dev.parent = &serio->dev;
651         input_dev->event = lkkbd_event;
652 
653         input_set_drvdata(input_dev, lk);
654 
655         __set_bit(EV_KEY, input_dev->evbit);
656         __set_bit(EV_LED, input_dev->evbit);
657         __set_bit(EV_SND, input_dev->evbit);
658         __set_bit(EV_REP, input_dev->evbit);
659         __set_bit(LED_CAPSL, input_dev->ledbit);
660         __set_bit(LED_SLEEP, input_dev->ledbit);
661         __set_bit(LED_COMPOSE, input_dev->ledbit);
662         __set_bit(LED_SCROLLL, input_dev->ledbit);
663         __set_bit(SND_BELL, input_dev->sndbit);
664         __set_bit(SND_CLICK, input_dev->sndbit);
665 
666         input_dev->keycode = lk->keycode;
667         input_dev->keycodesize = sizeof(lk->keycode[0]);
668         input_dev->keycodemax = ARRAY_SIZE(lk->keycode);
669 
670         for (i = 0; i < LK_NUM_KEYCODES; i++)
671                 __set_bit(lk->keycode[i], input_dev->keybit);
672         __clear_bit(KEY_RESERVED, input_dev->keybit);
673 
674         serio_set_drvdata(serio, lk);
675 
676         err = serio_open(serio, drv);
677         if (err)
678                 goto fail2;
679 
680         err = input_register_device(lk->dev);
681         if (err)
682                 goto fail3;
683 
684         serio_write(lk->serio, LK_CMD_POWERCYCLE_RESET);
685 
686         return 0;
687 
688  fail3: serio_close(serio);
689  fail2: serio_set_drvdata(serio, NULL);
690  fail1: input_free_device(input_dev);
691         kfree(lk);
692         return err;
693 }
694 
695 /*
696  * lkkbd_disconnect() unregisters and closes behind us.
697  */
698 static void lkkbd_disconnect(struct serio *serio)
699 {
700         struct lkkbd *lk = serio_get_drvdata(serio);
701 
702         input_get_device(lk->dev);
703         input_unregister_device(lk->dev);
704         serio_close(serio);
705         serio_set_drvdata(serio, NULL);
706         input_put_device(lk->dev);
707         kfree(lk);
708 }
709 
710 static struct serio_device_id lkkbd_serio_ids[] = {
711         {
712                 .type   = SERIO_RS232,
713                 .proto  = SERIO_LKKBD,
714                 .id     = SERIO_ANY,
715                 .extra  = SERIO_ANY,
716         },
717         { 0 }
718 };
719 
720 MODULE_DEVICE_TABLE(serio, lkkbd_serio_ids);
721 
722 static struct serio_driver lkkbd_drv = {
723         .driver         = {
724                 .name   = "lkkbd",
725         },
726         .description    = DRIVER_DESC,
727         .id_table       = lkkbd_serio_ids,
728         .connect        = lkkbd_connect,
729         .disconnect     = lkkbd_disconnect,
730         .interrupt      = lkkbd_interrupt,
731 };
732 
733 module_serio_driver(lkkbd_drv);
734 

This page was automatically generated by LXR 0.3.1 (source).  •  Linux is a registered trademark of Linus Torvalds  •  Contact us