[PATCH 27/44] Add DEC LK201/LK401 keyboard support

[Vojtech Pavlik <vojtech@suse.cz>]

You can pull this changeset from:
	bk://kernel.bkbits.net/vojtech/input

===================================================================

ChangeSet@1.1608.56.5, 2004-03-03 17:16:24+01:00, jbglaw@lug-owl.de
  input: Add DEC LK201/LK401 keyboard support


 Kconfig  |   13 +
 Makefile |    1 
 lkkbd.c  |  625 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 639 insertions(+)

===================================================================

diff -Nru a/drivers/input/keyboard/Kconfig b/drivers/input/keyboard/Kconfig
--- a/drivers/input/keyboard/Kconfig	Tue Mar 16 13:18:26 2004
+++ b/drivers/input/keyboard/Kconfig	Tue Mar 16 13:18:26 2004
@@ -41,6 +41,19 @@
 	  To compile this driver as a module, choose M here: the
 	  module will be called sunkbd.
 
+config KEYBOARD_LKKBD
+	tristate "DECstation/VAXstation LK201/LK401 keyboard support"
+	depends on INPUT && INPUT_KEYBOARD
+	select SERIO
+	help
+	  Say Y here if you want to use a LK201 or LK401 style serial
+	  keyboard. This keyboard is also useable on PCs if you attach
+	  it with the inputattach program. The connector pinout is
+	  described within lkkbd.c.
+
+	  To compile this driver as a module, choose M here: the
+	  module will be called lkkbd.
+
 config KEYBOARD_XTKBD
 	tristate "XT Keyboard support"
 	depends on INPUT && INPUT_KEYBOARD
diff -Nru a/drivers/input/keyboard/Makefile b/drivers/input/keyboard/Makefile
--- a/drivers/input/keyboard/Makefile	Tue Mar 16 13:18:26 2004
+++ b/drivers/input/keyboard/Makefile	Tue Mar 16 13:18:26 2004
@@ -7,6 +7,7 @@
 obj-$(CONFIG_KEYBOARD_ATKBD)		+= atkbd.o
 obj-$(CONFIG_KEYBOARD_MAPLE)		+= maple_keyb.o
 obj-$(CONFIG_KEYBOARD_SUNKBD)		+= sunkbd.o
+obj-$(CONFIG_KEYBOARD_LKKBD)		+= lkkbd.o
 obj-$(CONFIG_KEYBOARD_XTKBD)		+= xtkbd.o
 obj-$(CONFIG_KEYBOARD_AMIGA)		+= amikbd.o
 obj-$(CONFIG_KEYBOARD_NEWTON)		+= newtonkbd.o
diff -Nru a/drivers/input/keyboard/lkkbd.c b/drivers/input/keyboard/lkkbd.c
--- /dev/null	Wed Dec 31 16:00:00 1969
+++ b/drivers/input/keyboard/lkkbd.c	Tue Mar 16 13:18:26 2004
@@ -0,0 +1,625 @@
+/*
+ *  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).
+ *
+ * DISCLAUNER: This works for _me_. If you break anything by using the
+ * information given below, I will _not_ be lieable!
+ *
+ * RJ11 pinout:		To DB9:		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 DB9 or DB25!!!
+ *
+ * Pin numbers for DB9 and DB25 are noted on the plug (quite small:). For
+ * RJ11, 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).
+ */
+
+/*
+ * 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
+ * 
+ * Should you need to contact me, the author, you can do so either by
+ * email or by paper mail:
+ * Jan-Benedict Glaw, Lilienstraße 16, 33790 Hörste (near Halle/Westf.),
+ * Germany.
+ */
+
+#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>
+
+
+MODULE_AUTHOR ("Jan-Benedict Glaw <jblaw@lug-owl.de>");
+MODULE_DESCRIPTION ("LK keyboard driver");
+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%");
+
+
+
+#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
+
+/* Misc responses from keyboard */
+#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
+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(LED, BITS) do {		\
+	if (test_bit (LED, lk->dev.led))	\
+		leds_on |= BITS;		\
+	else					\
+		leds_off |= BITS;		\
+	} while (0)
+
+/*
+ * Per-keyboard data
+ */
+struct lkkbd {
+	lk_keycode_t keycode[LK_NUM_KEYCODES];
+	int 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;
+};
+
+/*
+ * 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;
+}
+
+/*
+ * 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 pt_regs *regs)
+{
+	struct lkkbd *lk = serio->private;
+	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->ignore_bytes--;
+		return IRQ_HANDLED;
+	}
+
+	switch (data) {
+		case LK_ALL_KEYS_UP:
+			input_regs (&lk->dev, regs);
+			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 LK_METRONOME:
+			DBG (KERN_INFO "Got LK_METRONOME and don't "
+					"know how to handle...\n");
+			break;
+		case LK_OUTPUT_ERROR:
+			DBG (KERN_INFO "Got LK_OUTPUT_ERROR and don't "
+					"know how to handle...\n");
+			break;
+		case LK_INPUT_ERROR:
+			DBG (KERN_INFO "Got LK_INPUT_ERROR and don't "
+					"know how to handle...\n");
+			break;
+		case LK_KBD_LOCKED:
+			DBG (KERN_INFO "Got LK_KBD_LOCKED and don't "
+					"know how to handle...\n");
+			break;
+		case LK_KBD_TEST_MODE_ACK:
+			DBG (KERN_INFO "Got LK_KBD_TEST_MODE_ACK and don't "
+					"know how to handle...\n");
+			break;
+		case LK_PREFIX_KEY_DOWN:
+			DBG (KERN_INFO "Got LK_PREFIX_KEY_DOWN and don't "
+					"know how to handle...\n");
+			break;
+		case LK_MODE_CHANGE_ACK:
+			DBG (KERN_INFO "Got LK_MODE_CHANGE_ACK and ignored "
+					"it properly...\n");
+			break;
+		case LK_RESPONSE_RESERVED:
+			DBG (KERN_INFO "Got LK_RESPONSE_RESERVED and don't "
+					"know how to handle...\n");
+			break;
+		case 0x01:
+			DBG (KERN_INFO "Got 0x01, scheduling re-initialization\n");
+			lk->ignore_bytes = 3;
+			schedule_work (&lk->tq);
+			break;
+
+		default:
+			if (lk->keycode[data] != KEY_RESERVED) {
+				input_regs (&lk->dev, regs);
+				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 %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 = dev->private;
+	unsigned char leds_on = 0;
+	unsigned char leds_off = 0;
+
+	switch (type) {
+		case EV_LED:
+			CHECK_LED (LED_CAPSL, LK_LED_SHIFTLOCK);
+			CHECK_LED (LED_COMPOSE, LK_LED_COMPOSE);
+			CHECK_LED (LED_SCROLLL, LK_LED_SCROLLLOCK);
+			CHECK_LED (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 (void *data)
+{
+	struct lkkbd *lk = data;
+	int division;
+	unsigned char leds_on = 0;
+	unsigned char leds_off = 0;
+
+	/* Reset parameters */
+	lk->serio->write (lk->serio, LK_CMD_SET_DEFAULTS);
+
+	/* Set LEDs */
+	CHECK_LED (LED_CAPSL, LK_LED_SHIFTLOCK);
+	CHECK_LED (LED_COMPOSE, LK_LED_COMPOSE);
+	CHECK_LED (LED_SCROLLL, LK_LED_SCROLLLOCK);
+	CHECK_LED (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 void
+lkkbd_connect (struct serio *serio, struct serio_dev *dev)
+{
+	struct lkkbd *lk;
+	int i;
+
+	if ((serio->type & SERIO_TYPE) != SERIO_RS232)
+		return;
+	if (!(serio->type & SERIO_PROTO))
+		return;
+	if ((serio->type & SERIO_PROTO) && (serio->type & SERIO_PROTO) != SERIO_LKKBD)
+		return;
+
+	if (!(lk = kmalloc (sizeof (struct lkkbd), GFP_KERNEL)))
+		return;
+	memset (lk, 0, sizeof (struct lkkbd));
+
+	init_input_dev (&lk->dev);
+
+	lk->dev.evbit[0] = BIT (EV_KEY) | BIT (EV_LED) | BIT (EV_SND) | BIT (EV_REP);
+	lk->dev.ledbit[0] = BIT (LED_CAPSL) | BIT (LED_COMPOSE) | BIT (LED_SCROLLL) | BIT (LED_SLEEP);
+	lk->dev.sndbit[0] = BIT (SND_CLICK) | BIT (SND_BELL);
+
+	lk->serio = serio;
+
+	INIT_WORK (&lk->tq, lkkbd_reinit, lk);
+
+	lk->bell_volume = bell_volume;
+	lk->keyclick_volume = keyclick_volume;
+	lk->ctrlclick_volume = ctrlclick_volume;
+
+	lk->dev.keycode = lk->keycode;
+	lk->dev.keycodesize = sizeof (lk_keycode_t);
+	lk->dev.keycodemax = LK_NUM_KEYCODES;
+
+	lk->dev.event = lkkbd_event;
+	lk->dev.private = lk;
+
+	serio->private = lk;
+
+	if (serio_open (serio, dev)) {
+		kfree (lk);
+		return;
+	}
+
+	sprintf (lk->name, "LK keyboard");
+
+	memcpy (lk->keycode, lkkbd_keycode, sizeof (lk_keycode_t) * LK_NUM_KEYCODES);
+	for (i = 0; i < LK_NUM_KEYCODES; i++)
+		set_bit (lk->keycode[i], lk->dev.keybit);
+
+	sprintf (lk->name, "%s/input0", serio->phys);
+
+	lk->dev.name = lk->name;
+	lk->dev.phys = lk->phys;
+	lk->dev.id.bustype = BUS_RS232;
+	lk->dev.id.vendor = SERIO_LKKBD;
+	lk->dev.id.product = 0;
+	lk->dev.id.version = 0x0100;
+
+	input_register_device (&lk->dev);
+
+	printk (KERN_INFO "input: %s on %s, initiating reset\n", lk->name, serio->phys);
+	lk->serio->write (lk->serio, LK_CMD_POWERCYCLE_RESET);
+}
+
+/*
+ * lkkbd_disconnect() unregisters and closes behind us.
+ */
+static void
+lkkbd_disconnect (struct serio *serio)
+{
+	struct lkkbd *lk = serio->private;
+
+	input_unregister_device (&lk->dev);
+	serio_close (serio);
+	kfree (lk);
+}
+
+static struct serio_dev lkkbd_dev = {
+	.interrupt = lkkbd_interrupt,
+	.connect = lkkbd_connect,
+	.disconnect = lkkbd_disconnect,
+};
+
+/*
+ * The functions for insering/removing us as a module.
+ */
+int __init
+lkkbd_init (void)
+{
+	serio_register_device (&lkkbd_dev);
+	return 0;
+}
+
+void __exit
+lkkbd_exit (void)
+{
+	serio_unregister_device (&lkkbd_dev);
+}
+
+module_init (lkkbd_init);
+module_exit (lkkbd_exit);
+