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lineage_kernel_xcoverpro/drivers/input/keyboard/lkkbd.c

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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/interrupt.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
static unsigned short 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 {
unsigned short 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]]);
}
/*
* 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);
struct input_dev *input_dev = lk->dev;
unsigned int keycode;
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++)
input_report_key(input_dev, lk->keycode[i], 0);
input_sync(input_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:
keycode = lk->keycode[data];
if (keycode != KEY_RESERVED) {
input_report_key(input_dev, keycode,
!test_bit(keycode, input_dev->key));
input_sync(input_dev);
} else {
printk(KERN_WARNING
"%s: Unknown key with scancode 0x%02x on %s.\n",
__FILE__, data, lk->name);
}
}
return IRQ_HANDLED;
}
static void lkkbd_toggle_leds(struct lkkbd *lk)
{
struct serio *serio = lk->serio;
unsigned char leds_on = 0;
unsigned char leds_off = 0;
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) {
serio_write(serio, LK_CMD_LED_ON);
serio_write(serio, leds_on);
}
if (leds_off != 0) {
serio_write(serio, LK_CMD_LED_OFF);
serio_write(serio, leds_off);
}
}
static void lkkbd_toggle_keyclick(struct lkkbd *lk, bool on)
{
struct serio *serio = lk->serio;
if (on) {
DBG("%s: Activating key clicks\n", __func__);
serio_write(serio, LK_CMD_ENABLE_KEYCLICK);
serio_write(serio, volume_to_hw(lk->keyclick_volume));
serio_write(serio, LK_CMD_ENABLE_CTRCLICK);
serio_write(serio, volume_to_hw(lk->ctrlclick_volume));
} else {
DBG("%s: Deactivating key clicks\n", __func__);
serio_write(serio, LK_CMD_DISABLE_KEYCLICK);
serio_write(serio, LK_CMD_DISABLE_CTRCLICK);
}
}
/*
* 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);
switch (type) {
case EV_LED:
lkkbd_toggle_leds(lk);
return 0;
case EV_SND:
switch (code) {
case SND_CLICK:
lkkbd_toggle_keyclick(lk, value);
return 0;
case SND_BELL:
if (value != 0)
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",
__func__, 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;
/* Ask for ID */
serio_write(lk->serio, LK_CMD_REQUEST_ID);
/* Reset parameters */
serio_write(lk->serio, LK_CMD_SET_DEFAULTS);
/* Set LEDs */
lkkbd_toggle_leds(lk);
/*
* Try to activate extended LK401 mode. This command will
* only work with a LK401 keyboard and grants access to
* LAlt, RAlt, RCompose and RShift.
*/
serio_write(lk->serio, LK_CMD_ENABLE_LK401);
/* Set all keys to UPDOWN mode */
for (division = 1; division <= 14; division++)
serio_write(lk->serio,
LK_CMD_SET_MODE(LK_MODE_UPDOWN, division));
/* Enable bell and set volume */
serio_write(lk->serio, LK_CMD_ENABLE_BELL);
serio_write(lk->serio, volume_to_hw(lk->bell_volume));
/* Enable/disable keyclick (and possibly set volume) */
lkkbd_toggle_keyclick(lk, test_bit(SND_CLICK, lk->dev->snd));
/* Sound the bell if needed */
if (test_bit(SND_BELL, lk->dev->snd))
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));
strlcpy(lk->name, "DEC LK keyboard", sizeof(lk->name));
snprintf(lk->phys, sizeof(lk->phys), "%s/input0", serio->phys);
input_dev->name = lk->name;
input_dev->phys = lk->phys;
input_dev->id.bustype = BUS_RS232;
input_dev->id.vendor = SERIO_LKKBD;
input_dev->id.product = 0;
input_dev->id.version = 0x0100;
input_dev->dev.parent = &serio->dev;
input_dev->event = lkkbd_event;
input_set_drvdata(input_dev, lk);
__set_bit(EV_KEY, input_dev->evbit);
__set_bit(EV_LED, input_dev->evbit);
__set_bit(EV_SND, input_dev->evbit);
__set_bit(EV_REP, input_dev->evbit);
__set_bit(LED_CAPSL, input_dev->ledbit);
__set_bit(LED_SLEEP, input_dev->ledbit);
__set_bit(LED_COMPOSE, input_dev->ledbit);
__set_bit(LED_SCROLLL, input_dev->ledbit);
__set_bit(SND_BELL, input_dev->sndbit);
__set_bit(SND_CLICK, input_dev->sndbit);
input_dev->keycode = lk->keycode;
input_dev->keycodesize = sizeof(lk->keycode[0]);
input_dev->keycodemax = ARRAY_SIZE(lk->keycode);
for (i = 0; i < LK_NUM_KEYCODES; i++)
__set_bit(lk->keycode[i], input_dev->keybit);
__clear_bit(KEY_RESERVED, input_dev->keybit);
serio_set_drvdata(serio, lk);
err = serio_open(serio, drv);
if (err)
goto fail2;
err = input_register_device(lk->dev);
if (err)
goto fail3;
serio_write(lk->serio, LK_CMD_POWERCYCLE_RESET);
return 0;
fail3: serio_close(serio);
fail2: serio_set_drvdata(serio, NULL);
fail1: input_free_device(input_dev);
kfree(lk);
return err;
}
/*
* lkkbd_disconnect() unregisters and closes behind us.
*/
static void lkkbd_disconnect(struct serio *serio)
{
struct lkkbd *lk = serio_get_drvdata(serio);
input_get_device(lk->dev);
input_unregister_device(lk->dev);
serio_close(serio);
serio_set_drvdata(serio, NULL);
input_put_device(lk->dev);
kfree(lk);
}
static const struct serio_device_id lkkbd_serio_ids[] = {
{
.type = SERIO_RS232,
.proto = SERIO_LKKBD,
.id = SERIO_ANY,
.extra = SERIO_ANY,
},
{ 0 }
};
MODULE_DEVICE_TABLE(serio, lkkbd_serio_ids);
static struct serio_driver lkkbd_drv = {
.driver = {
.name = "lkkbd",
},
.description = DRIVER_DESC,
.id_table = lkkbd_serio_ids,
.connect = lkkbd_connect,
.disconnect = lkkbd_disconnect,
.interrupt = lkkbd_interrupt,
};
module_serio_driver(lkkbd_drv);
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