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/*

 *  Copyright (C) 2004 by Jan-Benedict Glaw <jbglaw@lug-owl.de>

 */

/*

 * LK keyboard driver for Linux, based on sunkbd.c (C) by Vojtech Pavlik

 */

/*

 * DEC LK201 and LK401 keyboard driver for Linux (primary for DECstations

 * and VAXstations, but can also be used on any standard RS232 with an

 * adaptor).

 *

 * DISCLAIMER: This works for _me_. If you break anything by using the

 * information given below, I will _not_ be liable!

 *

 * RJ10 pinout:         To DE9:         Or DB25:

 *      1 - RxD <---->  Pin 3 (TxD) <-> Pin 2 (TxD)

 *      2 - GND <---->  Pin 5 (GND) <-> Pin 7 (GND)

 *      4 - TxD <---->  Pin 2 (RxD) <-> Pin 3 (RxD)

 *      3 - +12V (from HDD drive connector), DON'T connect to DE9 or DB25!!!

 *

 * Pin numbers for DE9 and DB25 are noted on the plug (quite small:). For

 * RJ10, it's like this:

 *

 *      __=__   Hold the plug in front of you, cable downwards,

 *     /___/|   nose is hidden behind the plug. Now, pin 1 is at

 *    |1234||   the left side, pin 4 at the right and 2 and 3 are

 *    |IIII||   in between, of course:)

 *    |    ||

 *    |____|/

 *      ||      So the adaptor consists of three connected cables

 *      ||      for data transmission (RxD and TxD) and signal ground.

 *              Additionally, you have to get +12V from somewhere.

 * Most easily, you'll get that from a floppy or HDD power connector.

 * It's the yellow cable there (black is ground and red is +5V).

 *

 * The keyboard and all the commands it understands are documented in

 * "VCB02 Video Subsystem - Technical Manual", EK-104AA-TM-001. This

 * document is LK201 specific, but LK401 is mostly compatible. It comes

 * up in LK201 mode and doesn't report any of the additional keys it

 * has. These need to be switched on with the LK_CMD_ENABLE_LK401

 * command. You'll find this document (scanned .pdf file) on MANX,

 * a search engine specific to DEC documentation. Try

 * http://www.vt100.net/manx/details?pn=EK-104AA-TM-001;id=21;cp=1

 */

/*

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License as published by

 * the Free Software Foundation; either version 2 of the License, or

 * (at your option) any later version.

 *

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 *

 * You should have received a copy of the GNU General Public License

 * along with this program; if not, write to the Free Software

 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA

 */

#include <linux/delay.h>

#include <linux/slab.h>

#include <linux/module.h>

#include <linux/moduleparam.h>

#include <linux/interrupt.h>

#include <linux/init.h>

#include <linux/input.h>

#include <linux/serio.h>

#include <linux/workqueue.h>

#define DRIVER_DESC     "LK keyboard driver"

MODULE_AUTHOR ("Jan-Benedict Glaw <jbglaw@lug-owl.de>");

MODULE_DESCRIPTION (DRIVER_DESC);

MODULE_LICENSE ("GPL");

/*

 * Known parameters:

 *      bell_volume

 *      keyclick_volume

 *      ctrlclick_volume

 *

 * Please notice that there's not yet an API to set these at runtime.

 */

static int bell_volume = 100; /* % */

module_param (bell_volume, int, 0);

MODULE_PARM_DESC (bell_volume, "Bell volume (in %). default is 100%");

static int keyclick_volume = 100; /* % */

module_param (keyclick_volume, int, 0);

MODULE_PARM_DESC (keyclick_volume, "Keyclick volume (in %), default is 100%");

static int ctrlclick_volume = 100; /* % */

module_param (ctrlclick_volume, int, 0);

MODULE_PARM_DESC (ctrlclick_volume, "Ctrlclick volume (in %), default is 100%");

static int lk201_compose_is_alt;

module_param (lk201_compose_is_alt, int, 0);

MODULE_PARM_DESC (lk201_compose_is_alt, "If set non-zero, LK201' Compose key "

                "will act as an Alt key");

#undef LKKBD_DEBUG

#ifdef LKKBD_DEBUG

#define DBG(x...) printk (x)

#else

#define DBG(x...) do {} while (0)

#endif

/* LED control */

#define LK_LED_WAIT             0x81

#define LK_LED_COMPOSE          0x82

#define LK_LED_SHIFTLOCK        0x84

#define LK_LED_SCROLLLOCK       0x88

#define LK_CMD_LED_ON           0x13

#define LK_CMD_LED_OFF          0x11

/* Mode control */

#define LK_MODE_DOWN            0x80

#define LK_MODE_AUTODOWN        0x82

#define LK_MODE_UPDOWN          0x86

#define LK_CMD_SET_MODE(mode,div)       ((mode) | ((div) << 3))

/* Misc commands */

#define LK_CMD_ENABLE_KEYCLICK  0x1b

#define LK_CMD_DISABLE_KEYCLICK 0x99

#define LK_CMD_DISABLE_BELL     0xa1

#define LK_CMD_SOUND_BELL       0xa7

#define LK_CMD_ENABLE_BELL      0x23

#define LK_CMD_DISABLE_CTRCLICK 0xb9

#define LK_CMD_ENABLE_CTRCLICK  0xbb

#define LK_CMD_SET_DEFAULTS     0xd3

#define LK_CMD_POWERCYCLE_RESET 0xfd

#define LK_CMD_ENABLE_LK401     0xe9

#define LK_CMD_REQUEST_ID       0xab

/* Misc responses from keyboard */

#define LK_STUCK_KEY            0x3d

#define LK_SELFTEST_FAILED      0x3e

#define LK_ALL_KEYS_UP          0xb3

#define LK_METRONOME            0xb4

#define LK_OUTPUT_ERROR         0xb5

#define LK_INPUT_ERROR          0xb6

#define LK_KBD_LOCKED           0xb7

#define LK_KBD_TEST_MODE_ACK    0xb8

#define LK_PREFIX_KEY_DOWN      0xb9

#define LK_MODE_CHANGE_ACK      0xba

#define LK_RESPONSE_RESERVED    0xbb

#define LK_NUM_KEYCODES         256

#define LK_NUM_IGNORE_BYTES     6

typedef u_int16_t lk_keycode_t;

static lk_keycode_t lkkbd_keycode[LK_NUM_KEYCODES] = {

        [0x56] = KEY_F1,

        [0x57] = KEY_F2,

        [0x58] = KEY_F3,

        [0x59] = KEY_F4,

        [0x5a] = KEY_F5,

        [0x64] = KEY_F6,

        [0x65] = KEY_F7,

        [0x66] = KEY_F8,

        [0x67] = KEY_F9,

        [0x68] = KEY_F10,

        [0x71] = KEY_F11,

        [0x72] = KEY_F12,

        [0x73] = KEY_F13,

        [0x74] = KEY_F14,

        [0x7c] = KEY_F15,

        [0x7d] = KEY_F16,

        [0x80] = KEY_F17,

        [0x81] = KEY_F18,

        [0x82] = KEY_F19,

        [0x83] = KEY_F20,

        [0x8a] = KEY_FIND,

        [0x8b] = KEY_INSERT,

        [0x8c] = KEY_DELETE,

        [0x8d] = KEY_SELECT,

        [0x8e] = KEY_PAGEUP,

        [0x8f] = KEY_PAGEDOWN,

        [0x92] = KEY_KP0,

        [0x94] = KEY_KPDOT,

        [0x95] = KEY_KPENTER,

        [0x96] = KEY_KP1,

        [0x97] = KEY_KP2,

        [0x98] = KEY_KP3,

        [0x99] = KEY_KP4,

        [0x9a] = KEY_KP5,

        [0x9b] = KEY_KP6,

        [0x9c] = KEY_KPCOMMA,

        [0x9d] = KEY_KP7,

        [0x9e] = KEY_KP8,

        [0x9f] = KEY_KP9,

        [0xa0] = KEY_KPMINUS,

        [0xa1] = KEY_PROG1,

        [0xa2] = KEY_PROG2,

        [0xa3] = KEY_PROG3,

        [0xa4] = KEY_PROG4,

        [0xa7] = KEY_LEFT,

        [0xa8] = KEY_RIGHT,

        [0xa9] = KEY_DOWN,

        [0xaa] = KEY_UP,

        [0xab] = KEY_RIGHTSHIFT,

        [0xac] = KEY_LEFTALT,

        [0xad] = KEY_COMPOSE, /* Right Compose, that is. */

        [0xae] = KEY_LEFTSHIFT, /* Same as KEY_RIGHTSHIFT on LK201 */

        [0xaf] = KEY_LEFTCTRL,

        [0xb0] = KEY_CAPSLOCK,

        [0xb1] = KEY_COMPOSE, /* Left Compose, that is. */

        [0xb2] = KEY_RIGHTALT,

        [0xbc] = KEY_BACKSPACE,

        [0xbd] = KEY_ENTER,

        [0xbe] = KEY_TAB,

        [0xbf] = KEY_ESC,

        [0xc0] = KEY_1,

        [0xc1] = KEY_Q,

        [0xc2] = KEY_A,

        [0xc3] = KEY_Z,

        [0xc5] = KEY_2,

        [0xc6] = KEY_W,

        [0xc7] = KEY_S,

        [0xc8] = KEY_X,

        [0xc9] = KEY_102ND,

        [0xcb] = KEY_3,

        [0xcc] = KEY_E,

        [0xcd] = KEY_D,

        [0xce] = KEY_C,

        [0xd0] = KEY_4,

        [0xd1] = KEY_R,

        [0xd2] = KEY_F,

        [0xd3] = KEY_V,

        [0xd4] = KEY_SPACE,

        [0xd6] = KEY_5,

        [0xd7] = KEY_T,

        [0xd8] = KEY_G,

        [0xd9] = KEY_B,

        [0xdb] = KEY_6,

        [0xdc] = KEY_Y,

        [0xdd] = KEY_H,

        [0xde] = KEY_N,

        [0xe0] = KEY_7,

        [0xe1] = KEY_U,

        [0xe2] = KEY_J,

        [0xe3] = KEY_M,

        [0xe5] = KEY_8,

        [0xe6] = KEY_I,

        [0xe7] = KEY_K,

        [0xe8] = KEY_COMMA,

        [0xea] = KEY_9,

        [0xeb] = KEY_O,

        [0xec] = KEY_L,

        [0xed] = KEY_DOT,

        [0xef] = KEY_0,

        [0xf0] = KEY_P,

        [0xf2] = KEY_SEMICOLON,

        [0xf3] = KEY_SLASH,

        [0xf5] = KEY_EQUAL,

        [0xf6] = KEY_RIGHTBRACE,

        [0xf7] = KEY_BACKSLASH,

        [0xf9] = KEY_MINUS,

        [0xfa] = KEY_LEFTBRACE,

        [0xfb] = KEY_APOSTROPHE,

};

#define CHECK_LED(LK, VAR_ON, VAR_OFF, LED, BITS) do {          \

        if (test_bit (LED, (LK)->dev->led))                     \

                VAR_ON |= BITS;                                 \

        else                                                    \

                VAR_OFF |= BITS;                                \

        } while (0)

/*

 * Per-keyboard data

 */

struct lkkbd {

        lk_keycode_t keycode[LK_NUM_KEYCODES];

        int ignore_bytes;

        unsigned char id[LK_NUM_IGNORE_BYTES];

        struct input_dev *dev;

        struct serio *serio;

        struct work_struct tq;

        char name[64];

        char phys[32];

        char type;

        int bell_volume;

        int keyclick_volume;

        int ctrlclick_volume;

};

#ifdef LKKBD_DEBUG

/*

 * Responses from the keyboard and mapping back to their names.

 */

static struct {

        unsigned char value;

        unsigned char *name;

} lk_response[] = {

#define RESPONSE(x) { .value = (x), .name = #x, }

        RESPONSE (LK_STUCK_KEY),

        RESPONSE (LK_SELFTEST_FAILED),

        RESPONSE (LK_ALL_KEYS_UP),

        RESPONSE (LK_METRONOME),

        RESPONSE (LK_OUTPUT_ERROR),

        RESPONSE (LK_INPUT_ERROR),

        RESPONSE (LK_KBD_LOCKED),

        RESPONSE (LK_KBD_TEST_MODE_ACK),

        RESPONSE (LK_PREFIX_KEY_DOWN),

        RESPONSE (LK_MODE_CHANGE_ACK),

        RESPONSE (LK_RESPONSE_RESERVED),

#undef RESPONSE

};

static unsigned char *

response_name (unsigned char value)

{

        int i;

        for (i = 0; i < ARRAY_SIZE (lk_response); i++)

                if (lk_response[i].value == value)

                        return lk_response[i].name;

        return "<unknown>";

}

#endif /* LKKBD_DEBUG */

/*

 * Calculate volume parameter byte for a given volume.

 */

static unsigned char

volume_to_hw (int volume_percent)

{

        unsigned char ret = 0;

        if (volume_percent < 0)

                volume_percent = 0;

        if (volume_percent > 100)

                volume_percent = 100;

        if (volume_percent >= 0)

                ret = 7;

        if (volume_percent >= 13)       /* 12.5 */

                ret = 6;

        if (volume_percent >= 25)

                ret = 5;

        if (volume_percent >= 38)       /* 37.5 */

                ret = 4;

        if (volume_percent >= 50)

                ret = 3;

        if (volume_percent >= 63)       /* 62.5 */

                ret = 2;                /* This is the default volume */

        if (volume_percent >= 75)

                ret = 1;

        if (volume_percent >= 88)       /* 87.5 */

                ret = 0;

        ret |= 0x80;

        return ret;

}

static void

lkkbd_detection_done (struct lkkbd *lk)

{

        int i;

        /*

         * Reset setting for Compose key. Let Compose be KEY_COMPOSE.

         */

        lk->keycode[0xb1] = KEY_COMPOSE;

        /*

         * Print keyboard name and modify Compose=Alt on user's request.

         */

        switch (lk->id[4]) {

                case 1:

                        strlcpy (lk->name, "DEC LK201 keyboard",

                                 sizeof (lk->name));

                        if (lk201_compose_is_alt)

                                lk->keycode[0xb1] = KEY_LEFTALT;

                        break;

                case 2:

                        strlcpy (lk->name, "DEC LK401 keyboard",

                                 sizeof (lk->name));

                        break;

                default:

                        strlcpy (lk->name, "Unknown DEC keyboard",

                                 sizeof (lk->name));

                        printk (KERN_ERR "lkkbd: keyboard on %s is unknown, "

                                        "please report to Jan-Benedict Glaw "

                                        "<jbglaw@lug-owl.de>\n", lk->phys);

                        printk (KERN_ERR "lkkbd: keyboard ID'ed as:");

                        for (i = 0; i < LK_NUM_IGNORE_BYTES; i++)

                                printk (" 0x%02x", lk->id[i]);

                        printk ("\n");

                        break;

        }

        printk (KERN_INFO "lkkbd: keyboard on %s identified as: %s\n",

                        lk->phys, lk->name);

        /*

         * Report errors during keyboard boot-up.

         */

        switch (lk->id[2]) {

                case 0x00:

                        /* All okay */

                        break;

                case LK_STUCK_KEY:

                        printk (KERN_ERR "lkkbd: Stuck key on keyboard at "

                                        "%s\n", lk->phys);

                        break;

                case LK_SELFTEST_FAILED:

                        printk (KERN_ERR "lkkbd: Selftest failed on keyboard "

                                        "at %s, keyboard may not work "

                                        "properly\n", lk->phys);

                        break;

                default:

                        printk (KERN_ERR "lkkbd: Unknown error %02x on "

                                        "keyboard at %s\n", lk->id[2],

                                        lk->phys);

                        break;

        }

        /*

         * Try to hint user if there's a stuck key.

         */

        if (lk->id[2] == LK_STUCK_KEY && lk->id[3] != 0)

                printk (KERN_ERR "Scancode of stuck key is 0x%02x, keycode "

                                "is 0x%04x\n", lk->id[3],

                                lk->keycode[lk->id[3]]);

        return;

}

/*

 * lkkbd_interrupt() is called by the low level driver when a character

 * is received.

 */

static irqreturn_t

lkkbd_interrupt (struct serio *serio, unsigned char data, unsigned int flags)

{

        struct lkkbd *lk = serio_get_drvdata (serio);

        int i;

        DBG (KERN_INFO "Got byte 0x%02x\n", data);

        if (lk->ignore_bytes > 0) {

                DBG (KERN_INFO "Ignoring a byte on %s\n", lk->name);

                lk->id[LK_NUM_IGNORE_BYTES - lk->ignore_bytes--] = data;

                if (lk->ignore_bytes == 0)

                        lkkbd_detection_done (lk);

                return IRQ_HANDLED;

        }

        switch (data) {

                case LK_ALL_KEYS_UP:

                        for (i = 0; i < ARRAY_SIZE (lkkbd_keycode); i++)

                                if (lk->keycode[i] != KEY_RESERVED)

                                        input_report_key (lk->dev, lk->keycode[i], 0);

                        input_sync (lk->dev);

                        break;

                case 0x01:

                        DBG (KERN_INFO "Got 0x01, scheduling re-initialization\n");

                        lk->ignore_bytes = LK_NUM_IGNORE_BYTES;

                        lk->id[LK_NUM_IGNORE_BYTES - lk->ignore_bytes--] = data;

                        schedule_work (&lk->tq);

                        break;

                case LK_METRONOME:

                case LK_OUTPUT_ERROR:

                case LK_INPUT_ERROR:

                case LK_KBD_LOCKED:

                case LK_KBD_TEST_MODE_ACK:

                case LK_PREFIX_KEY_DOWN:

                case LK_MODE_CHANGE_ACK:

                case LK_RESPONSE_RESERVED:

                        DBG (KERN_INFO "Got %s and don't know how to handle...\n",

                                        response_name (data));

                        break;

                default:

                        if (lk->keycode[data] != KEY_RESERVED) {

                                if (!test_bit (lk->keycode[data], lk->dev->key))

                                        input_report_key (lk->dev, lk->keycode[data], 1);

                                else

                                        input_report_key (lk->dev, lk->keycode[data], 0);

                                input_sync (lk->dev);

                        } else

                                printk (KERN_WARNING "%s: Unknown key with "

                                                "scancode 0x%02x on %s.\n",

                                                __FILE__, data, lk->name);

        }

        return IRQ_HANDLED;

}

/*

 * lkkbd_event() handles events from the input module.

 */

static int

lkkbd_event (struct input_dev *dev, unsigned int type, unsigned int code,

                int value)

{

        struct lkkbd *lk = input_get_drvdata (dev);

        unsigned char leds_on = 0;

        unsigned char leds_off = 0;

        switch (type) {

                case EV_LED:

                        CHECK_LED (lk, leds_on, leds_off, LED_CAPSL, LK_LED_SHIFTLOCK);

                        CHECK_LED (lk, leds_on, leds_off, LED_COMPOSE, LK_LED_COMPOSE);

                        CHECK_LED (lk, leds_on, leds_off, LED_SCROLLL, LK_LED_SCROLLLOCK);

                        CHECK_LED (lk, leds_on, leds_off, LED_SLEEP, LK_LED_WAIT);

                        if (leds_on != 0) {

                                lk->serio->write (lk->serio, LK_CMD_LED_ON);

                                lk->serio->write (lk->serio, leds_on);

                        }

                        if (leds_off != 0) {

                                lk->serio->write (lk->serio, LK_CMD_LED_OFF);

                                lk->serio->write (lk->serio, leds_off);

                        }

                        return 0;

                case EV_SND:

                        switch (code) {

                                case SND_CLICK:

                                        if (value == 0) {

                                                DBG ("%s: Deactivating key clicks\n", __FUNCTION__);

                                                lk->serio->write (lk->serio, LK_CMD_DISABLE_KEYCLICK);

                                                lk->serio->write (lk->serio, LK_CMD_DISABLE_CTRCLICK);

                                        } else {

                                                DBG ("%s: Activating key clicks\n", __FUNCTION__);

                                                lk->serio->write (lk->serio, LK_CMD_ENABLE_KEYCLICK);

                                                lk->serio->write (lk->serio, volume_to_hw (lk->keyclick_volume));

                                                lk->serio->write (lk->serio, LK_CMD_ENABLE_CTRCLICK);

                                                lk->serio->write (lk->serio, volume_to_hw (lk->ctrlclick_volume));

                                        }

                                        return 0;

                                case SND_BELL:

                                        if (value != 0)

                                                lk->serio->write (lk->serio, LK_CMD_SOUND_BELL);

                                        return 0;

                        }

                        break;

                default:

                        printk (KERN_ERR "%s (): Got unknown type %d, code %d, value %d\n",

                                        __FUNCTION__, type, code, value);

        }

        return -1;

}

/*

 * lkkbd_reinit() sets leds and beeps to a state the computer remembers they

 * were in.

 */

static void

lkkbd_reinit (struct work_struct *work)

{

        struct lkkbd *lk = container_of(work, struct lkkbd, tq);

        int division;

        unsigned char leds_on = 0;

        unsigned char leds_off = 0;

        /* Ask for ID */

        lk->serio->write (lk->serio, LK_CMD_REQUEST_ID);

        /* Reset parameters */

        lk->serio->write (lk->serio, LK_CMD_SET_DEFAULTS);

        /* Set LEDs */

        CHECK_LED (lk, leds_on, leds_off, LED_CAPSL, LK_LED_SHIFTLOCK);

        CHECK_LED (lk, leds_on, leds_off, LED_COMPOSE, LK_LED_COMPOSE);

        CHECK_LED (lk, leds_on, leds_off, LED_SCROLLL, LK_LED_SCROLLLOCK);

        CHECK_LED (lk, leds_on, leds_off, LED_SLEEP, LK_LED_WAIT);

        if (leds_on != 0) {

                lk->serio->write (lk->serio, LK_CMD_LED_ON);

                lk->serio->write (lk->serio, leds_on);

        }

        if (leds_off != 0) {

                lk->serio->write (lk->serio, LK_CMD_LED_OFF);

                lk->serio->write (lk->serio, leds_off);

        }

        /*

         * Try to activate extended LK401 mode. This command will

         * only work with a LK401 keyboard and grants access to

         * LAlt, RAlt, RCompose and RShift.

         */

        lk->serio->write (lk->serio, LK_CMD_ENABLE_LK401);

        /* Set all keys to UPDOWN mode */

        for (division = 1; division <= 14; division++)

                lk->serio->write (lk->serio, LK_CMD_SET_MODE (LK_MODE_UPDOWN,

                                        division));

        /* Enable bell and set volume */

        lk->serio->write (lk->serio, LK_CMD_ENABLE_BELL);

        lk->serio->write (lk->serio, volume_to_hw (lk->bell_volume));

        /* Enable/disable keyclick (and possibly set volume) */

        if (test_bit (SND_CLICK, lk->dev->snd)) {

                lk->serio->write (lk->serio, LK_CMD_ENABLE_KEYCLICK);

                lk->serio->write (lk->serio, volume_to_hw (lk->keyclick_volume));

                lk->serio->write (lk->serio, LK_CMD_ENABLE_CTRCLICK);

                lk->serio->write (lk->serio, volume_to_hw (lk->ctrlclick_volume));

        } else {

                lk->serio->write (lk->serio, LK_CMD_DISABLE_KEYCLICK);

                lk->serio->write (lk->serio, LK_CMD_DISABLE_CTRCLICK);

        }

        /* Sound the bell if needed */

        if (test_bit (SND_BELL, lk->dev->snd))

                lk->serio->write (lk->serio, LK_CMD_SOUND_BELL);

}

/*

 * lkkbd_connect() probes for a LK keyboard and fills the necessary structures.

 */

static int

lkkbd_connect (struct serio *serio, struct serio_driver *drv)

{

        struct lkkbd *lk;

        struct input_dev *input_dev;

        int i;

        int err;

        lk = kzalloc (sizeof (struct lkkbd), GFP_KERNEL);

        input_dev = input_allocate_device ();

        if (!lk || !input_dev) {

                err = -ENOMEM;

                goto fail1;

        }

        lk->serio = serio;

        lk->dev = input_dev;

        INIT_WORK (&lk->tq, lkkbd_reinit);

        lk->bell_volume = bell_volume;

        lk->keyclick_volume = keyclick_volume;

        lk->ctrlclick_volume = ctrlclick_volume;

        memcpy (lk->keycode, lkkbd_keycode, sizeof (lk_keycode_t) * LK_NUM_KEYCODES);

        strlcpy (lk->name, "DEC LK keyboard", sizeof(lk->name));