drivers/input/keyboard/sunkbd.c - kernel/lockdown - Git at Google

 /*
  *  Copyright (c) 1999-2001 Vojtech Pavlik
  */

 /*
  * Sun keyboard driver for Linux
  */

 /*
  * 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
  * e-mail - mail your message to <vojtech@ucw.cz>, or by paper mail:
  * Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic
  */

 #include <linux/delay.h>
 #include <linux/sched.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	"Sun keyboard driver"

 MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
 MODULE_DESCRIPTION(DRIVER_DESC);
 MODULE_LICENSE("GPL");

 static unsigned char sunkbd_keycode[128] = {
 	  0,128,114,129,115, 59, 60, 68, 61, 87, 62, 88, 63,100, 64,112,
 	 65, 66, 67, 56,103,119, 99, 70,105,130,131,108,106,  1,  2,  3,
 	  4,  5,  6,  7,  8,  9, 10, 11, 12, 13, 41, 14,110,113, 98, 55,
 	116,132, 83,133,102, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25,
 	 26, 27,111,127, 71, 72, 73, 74,134,135,107,  0, 29, 30, 31, 32,
 	 33, 34, 35, 36, 37, 38, 39, 40, 43, 28, 96, 75, 76, 77, 82,136,
 	104,137, 69, 42, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54,101,
 	 79, 80, 81,  0,  0,  0,138, 58,125, 57,126,109, 86, 78
 };

 #define SUNKBD_CMD_RESET	0x1
 #define SUNKBD_CMD_BELLON	0x2
 #define SUNKBD_CMD_BELLOFF	0x3
 #define SUNKBD_CMD_CLICK	0xa
 #define SUNKBD_CMD_NOCLICK	0xb
 #define SUNKBD_CMD_SETLED	0xe
 #define SUNKBD_CMD_LAYOUT	0xf

 #define SUNKBD_RET_RESET	0xff
 #define SUNKBD_RET_ALLUP	0x7f
 #define SUNKBD_RET_LAYOUT	0xfe

 #define SUNKBD_LAYOUT_5_MASK	0x20
 #define SUNKBD_RELEASE		0x80
 #define SUNKBD_KEY		0x7f

 /*
  * Per-keyboard data.
  */

 struct sunkbd {
 	unsigned char keycode[ARRAY_SIZE(sunkbd_keycode)];
 	struct input_dev *dev;
 	struct serio *serio;
 	struct work_struct tq;
 	wait_queue_head_t wait;
 	char name[64];
 	char phys[32];
 	char type;
 	bool enabled;
 	volatile s8 reset;
 	volatile s8 layout;
 };

 /*
  * sunkbd_interrupt() is called by the low level driver when a character
  * is received.
  */

 static irqreturn_t sunkbd_interrupt(struct serio *serio,
 		unsigned char data, unsigned int flags)
 {
 	struct sunkbd *sunkbd = serio_get_drvdata(serio);

 	if (sunkbd->reset <= -1) {
 		/*
 		 * If cp[i] is 0xff, sunkbd->reset will stay -1.
 		 * The keyboard sends 0xff 0xff 0xID on powerup.
 		 */
 		sunkbd->reset = data;
 		wake_up_interruptible(&sunkbd->wait);
 		goto out;
 	}

 	if (sunkbd->layout == -1) {
 		sunkbd->layout = data;
 		wake_up_interruptible(&sunkbd->wait);
 		goto out;
 	}

 	switch (data) {

 	case SUNKBD_RET_RESET:
 		schedule_work(&sunkbd->tq);
 		sunkbd->reset = -1;
 		break;

 	case SUNKBD_RET_LAYOUT:
 		sunkbd->layout = -1;
 		break;

 	case SUNKBD_RET_ALLUP: /* All keys released */
 		break;

 	default:
 		if (!sunkbd->enabled)
 			break;

 		if (sunkbd->keycode[data & SUNKBD_KEY]) {
 			input_report_key(sunkbd->dev,
 					 sunkbd->keycode[data & SUNKBD_KEY],
 					 !(data & SUNKBD_RELEASE));
 			input_sync(sunkbd->dev);
 		} else {
 			printk(KERN_WARNING
 				"sunkbd.c: Unknown key (scancode %#x) %s.\n",
 				data & SUNKBD_KEY,
 				data & SUNKBD_RELEASE ? "released" : "pressed");
 		}
 	}
 out:
 	return IRQ_HANDLED;
 }

 /*
  * sunkbd_event() handles events from the input module.
  */

 static int sunkbd_event(struct input_dev *dev,
 			unsigned int type, unsigned int code, int value)
 {
 	struct sunkbd *sunkbd = input_get_drvdata(dev);

 	switch (type) {

 	case EV_LED:

 		serio_write(sunkbd->serio, SUNKBD_CMD_SETLED);
 		serio_write(sunkbd->serio,
 			(!!test_bit(LED_CAPSL,   dev->led) << 3) |
 			(!!test_bit(LED_SCROLLL, dev->led) << 2) |
 			(!!test_bit(LED_COMPOSE, dev->led) << 1) |
 			 !!test_bit(LED_NUML,    dev->led));
 		return 0;

 	case EV_SND:

 		switch (code) {

 		case SND_CLICK:
 			serio_write(sunkbd->serio, SUNKBD_CMD_NOCLICK - value);
 			return 0;

 		case SND_BELL:
 			serio_write(sunkbd->serio, SUNKBD_CMD_BELLOFF - value);
 			return 0;
 		}

 		break;
 	}

 	return -1;
 }

 /*
  * sunkbd_initialize() checks for a Sun keyboard attached, and determines
  * its type.
  */

 static int sunkbd_initialize(struct sunkbd *sunkbd)
 {
 	sunkbd->reset = -2;
 	serio_write(sunkbd->serio, SUNKBD_CMD_RESET);
 	wait_event_interruptible_timeout(sunkbd->wait, sunkbd->reset >= 0, HZ);
 	if (sunkbd->reset < 0)
 		return -1;

 	sunkbd->type = sunkbd->reset;

 	if (sunkbd->type == 4) {	/* Type 4 keyboard */
 		sunkbd->layout = -2;
 		serio_write(sunkbd->serio, SUNKBD_CMD_LAYOUT);
 		wait_event_interruptible_timeout(sunkbd->wait,
 						 sunkbd->layout >= 0, HZ / 4);
 		if (sunkbd->layout < 0)
 			return -1;
 		if (sunkbd->layout & SUNKBD_LAYOUT_5_MASK)
 			sunkbd->type = 5;
 	}

 	return 0;
 }

 /*
  * sunkbd_reinit() sets leds and beeps to a state the computer remembers they
  * were in.
  */

 static void sunkbd_reinit(struct work_struct *work)
 {
 	struct sunkbd *sunkbd = container_of(work, struct sunkbd, tq);

 	wait_event_interruptible_timeout(sunkbd->wait, sunkbd->reset >= 0, HZ);

 	serio_write(sunkbd->serio, SUNKBD_CMD_SETLED);
 	serio_write(sunkbd->serio,
 		(!!test_bit(LED_CAPSL,   sunkbd->dev->led) << 3) |
 		(!!test_bit(LED_SCROLLL, sunkbd->dev->led) << 2) |
 		(!!test_bit(LED_COMPOSE, sunkbd->dev->led) << 1) |
 		 !!test_bit(LED_NUML,    sunkbd->dev->led));
 	serio_write(sunkbd->serio,
 		SUNKBD_CMD_NOCLICK - !!test_bit(SND_CLICK, sunkbd->dev->snd));
 	serio_write(sunkbd->serio,
 		SUNKBD_CMD_BELLOFF - !!test_bit(SND_BELL, sunkbd->dev->snd));
 }

 static void sunkbd_enable(struct sunkbd *sunkbd, bool enable)
 {
 	serio_pause_rx(sunkbd->serio);
 	sunkbd->enabled = enable;
 	serio_continue_rx(sunkbd->serio);
 }

 /*
  * sunkbd_connect() probes for a Sun keyboard and fills the necessary
  * structures.
  */

 static int sunkbd_connect(struct serio *serio, struct serio_driver *drv)
 {
 	struct sunkbd *sunkbd;
 	struct input_dev *input_dev;
 	int err = -ENOMEM;
 	int i;

 	sunkbd = kzalloc(sizeof(struct sunkbd), GFP_KERNEL);
 	input_dev = input_allocate_device();
 	if (!sunkbd || !input_dev)
 		goto fail1;

 	sunkbd->serio = serio;
 	sunkbd->dev = input_dev;
 	init_waitqueue_head(&sunkbd->wait);
 	INIT_WORK(&sunkbd->tq, sunkbd_reinit);
 	snprintf(sunkbd->phys, sizeof(sunkbd->phys), "%s/input0", serio->phys);

 	serio_set_drvdata(serio, sunkbd);

 	err = serio_open(serio, drv);
 	if (err)
 		goto fail2;

 	if (sunkbd_initialize(sunkbd) < 0) {
 		err = -ENODEV;
 		goto fail3;
 	}

 	snprintf(sunkbd->name, sizeof(sunkbd->name),
 		 "Sun Type %d keyboard", sunkbd->type);
 	memcpy(sunkbd->keycode, sunkbd_keycode, sizeof(sunkbd->keycode));

 	input_dev->name = sunkbd->name;
 	input_dev->phys = sunkbd->phys;
 	input_dev->id.bustype = BUS_RS232;
 	input_dev->id.vendor  = SERIO_SUNKBD;
 	input_dev->id.product = sunkbd->type;
 	input_dev->id.version = 0x0100;
 	input_dev->dev.parent = &serio->dev;

 	input_set_drvdata(input_dev, sunkbd);

 	input_dev->event = sunkbd_event;

 	input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_LED) |
 		BIT_MASK(EV_SND) | BIT_MASK(EV_REP);
 	input_dev->ledbit[0] = BIT_MASK(LED_CAPSL) | BIT_MASK(LED_COMPOSE) |
 		BIT_MASK(LED_SCROLLL) | BIT_MASK(LED_NUML);
 	input_dev->sndbit[0] = BIT_MASK(SND_CLICK) | BIT_MASK(SND_BELL);

 	input_dev->keycode = sunkbd->keycode;
 	input_dev->keycodesize = sizeof(unsigned char);
 	input_dev->keycodemax = ARRAY_SIZE(sunkbd_keycode);
 	for (i = 0; i < ARRAY_SIZE(sunkbd_keycode); i++)
 		__set_bit(sunkbd->keycode[i], input_dev->keybit);
 	__clear_bit(KEY_RESERVED, input_dev->keybit);

 	sunkbd_enable(sunkbd, true);

 	err = input_register_device(sunkbd->dev);
 	if (err)
 		goto fail4;

 	return 0;

  fail4:	sunkbd_enable(sunkbd, false);
  fail3:	serio_close(serio);
  fail2:	serio_set_drvdata(serio, NULL);
  fail1:	input_free_device(input_dev);
 	kfree(sunkbd);
 	return err;
 }

 /*
  * sunkbd_disconnect() unregisters and closes behind us.
  */

 static void sunkbd_disconnect(struct serio *serio)
 {
 	struct sunkbd *sunkbd = serio_get_drvdata(serio);

 	sunkbd_enable(sunkbd, false);
 	input_unregister_device(sunkbd->dev);
 	serio_close(serio);
 	serio_set_drvdata(serio, NULL);
 	kfree(sunkbd);
 }

 static struct serio_device_id sunkbd_serio_ids[] = {
 	{
 		.type	= SERIO_RS232,
 		.proto	= SERIO_SUNKBD,
 		.id	= SERIO_ANY,
 		.extra	= SERIO_ANY,
 	},
 	{
 		.type	= SERIO_RS232,
 		.proto	= SERIO_UNKNOWN, /* sunkbd does probe */
 		.id	= SERIO_ANY,
 		.extra	= SERIO_ANY,
 	},
 	{ 0 }
 };

 MODULE_DEVICE_TABLE(serio, sunkbd_serio_ids);

 static struct serio_driver sunkbd_drv = {
 	.driver		= {
 		.name	= "sunkbd",
 	},
 	.description	= DRIVER_DESC,
 	.id_table	= sunkbd_serio_ids,
 	.interrupt	= sunkbd_interrupt,
 	.connect	= sunkbd_connect,
 	.disconnect	= sunkbd_disconnect,
 };

 module_serio_driver(sunkbd_drv);
	/*
	* Copyright (c) 1999-2001 Vojtech Pavlik
	*/

	/*
	* Sun keyboard driver for Linux
	*/

	/*
	* 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
	* e-mail - mail your message to <vojtech@ucw.cz>, or by paper mail:
	* Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic
	*/

	#include <linux/delay.h>
	#include <linux/sched.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 "Sun keyboard driver"

	MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
	MODULE_DESCRIPTION(DRIVER_DESC);
	MODULE_LICENSE("GPL");

	static unsigned char sunkbd_keycode[128] = {
	0,128,114,129,115, 59, 60, 68, 61, 87, 62, 88, 63,100, 64,112,
	65, 66, 67, 56,103,119, 99, 70,105,130,131,108,106, 1, 2, 3,
	4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 41, 14,110,113, 98, 55,
	116,132, 83,133,102, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25,
	26, 27,111,127, 71, 72, 73, 74,134,135,107, 0, 29, 30, 31, 32,
	33, 34, 35, 36, 37, 38, 39, 40, 43, 28, 96, 75, 76, 77, 82,136,
	104,137, 69, 42, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54,101,
	79, 80, 81, 0, 0, 0,138, 58,125, 57,126,109, 86, 78
	};

	#define SUNKBD_CMD_RESET 0x1
	#define SUNKBD_CMD_BELLON 0x2
	#define SUNKBD_CMD_BELLOFF 0x3
	#define SUNKBD_CMD_CLICK 0xa
	#define SUNKBD_CMD_NOCLICK 0xb
	#define SUNKBD_CMD_SETLED 0xe
	#define SUNKBD_CMD_LAYOUT 0xf

	#define SUNKBD_RET_RESET 0xff
	#define SUNKBD_RET_ALLUP 0x7f
	#define SUNKBD_RET_LAYOUT 0xfe

	#define SUNKBD_LAYOUT_5_MASK 0x20
	#define SUNKBD_RELEASE 0x80
	#define SUNKBD_KEY 0x7f

	/*
	* Per-keyboard data.
	*/

	struct sunkbd {
	unsigned char keycode[ARRAY_SIZE(sunkbd_keycode)];
	struct input_dev *dev;
	struct serio *serio;
	struct work_struct tq;
	wait_queue_head_t wait;
	char name[64];
	char phys[32];
	char type;
	bool enabled;
	volatile s8 reset;
	volatile s8 layout;
	};

	/*
	* sunkbd_interrupt() is called by the low level driver when a character
	* is received.
	*/

	static irqreturn_t sunkbd_interrupt(struct serio *serio,
	unsigned char data, unsigned int flags)
	{
	struct sunkbd *sunkbd = serio_get_drvdata(serio);

	if (sunkbd->reset <= -1) {
	/*
	* If cp[i] is 0xff, sunkbd->reset will stay -1.
	* The keyboard sends 0xff 0xff 0xID on powerup.
	*/
	sunkbd->reset = data;
	wake_up_interruptible(&sunkbd->wait);
	goto out;
	}

	if (sunkbd->layout == -1) {
	sunkbd->layout = data;
	wake_up_interruptible(&sunkbd->wait);
	goto out;
	}

	switch (data) {

	case SUNKBD_RET_RESET:
	schedule_work(&sunkbd->tq);
	sunkbd->reset = -1;
	break;

	case SUNKBD_RET_LAYOUT:
	sunkbd->layout = -1;
	break;

	case SUNKBD_RET_ALLUP: /* All keys released */
	break;

	default:
	if (!sunkbd->enabled)
	break;

	if (sunkbd->keycode[data & SUNKBD_KEY]) {
	input_report_key(sunkbd->dev,
	sunkbd->keycode[data & SUNKBD_KEY],
	!(data & SUNKBD_RELEASE));
	input_sync(sunkbd->dev);
	} else {
	printk(KERN_WARNING
	"sunkbd.c: Unknown key (scancode %#x) %s.\n",
	data & SUNKBD_KEY,
	data & SUNKBD_RELEASE ? "released" : "pressed");
	}
	}
	out:
	return IRQ_HANDLED;
	}

	/*
	* sunkbd_event() handles events from the input module.
	*/

	static int sunkbd_event(struct input_dev *dev,
	unsigned int type, unsigned int code, int value)
	{
	struct sunkbd *sunkbd = input_get_drvdata(dev);

	switch (type) {

	case EV_LED:

	serio_write(sunkbd->serio, SUNKBD_CMD_SETLED);
	serio_write(sunkbd->serio,
	(!!test_bit(LED_CAPSL, dev->led) << 3) \|
	(!!test_bit(LED_SCROLLL, dev->led) << 2) \|
	(!!test_bit(LED_COMPOSE, dev->led) << 1) \|
	!!test_bit(LED_NUML, dev->led));
	return 0;

	case EV_SND:

	switch (code) {

	case SND_CLICK:
	serio_write(sunkbd->serio, SUNKBD_CMD_NOCLICK - value);
	return 0;

	case SND_BELL:
	serio_write(sunkbd->serio, SUNKBD_CMD_BELLOFF - value);
	return 0;
	}

	break;
	}

	return -1;
	}

	/*
	* sunkbd_initialize() checks for a Sun keyboard attached, and determines
	* its type.
	*/

	static int sunkbd_initialize(struct sunkbd *sunkbd)
	{
	sunkbd->reset = -2;
	serio_write(sunkbd->serio, SUNKBD_CMD_RESET);
	wait_event_interruptible_timeout(sunkbd->wait, sunkbd->reset >= 0, HZ);
	if (sunkbd->reset < 0)
	return -1;

	sunkbd->type = sunkbd->reset;

	if (sunkbd->type == 4) { /* Type 4 keyboard */
	sunkbd->layout = -2;
	serio_write(sunkbd->serio, SUNKBD_CMD_LAYOUT);
	wait_event_interruptible_timeout(sunkbd->wait,
	sunkbd->layout >= 0, HZ / 4);
	if (sunkbd->layout < 0)
	return -1;
	if (sunkbd->layout & SUNKBD_LAYOUT_5_MASK)
	sunkbd->type = 5;
	}

	return 0;
	}

	/*
	* sunkbd_reinit() sets leds and beeps to a state the computer remembers they
	* were in.
	*/

	static void sunkbd_reinit(struct work_struct *work)
	{
	struct sunkbd *sunkbd = container_of(work, struct sunkbd, tq);

	wait_event_interruptible_timeout(sunkbd->wait, sunkbd->reset >= 0, HZ);

	serio_write(sunkbd->serio, SUNKBD_CMD_SETLED);
	serio_write(sunkbd->serio,
	(!!test_bit(LED_CAPSL, sunkbd->dev->led) << 3) \|
	(!!test_bit(LED_SCROLLL, sunkbd->dev->led) << 2) \|
	(!!test_bit(LED_COMPOSE, sunkbd->dev->led) << 1) \|
	!!test_bit(LED_NUML, sunkbd->dev->led));
	serio_write(sunkbd->serio,
	SUNKBD_CMD_NOCLICK - !!test_bit(SND_CLICK, sunkbd->dev->snd));
	serio_write(sunkbd->serio,
	SUNKBD_CMD_BELLOFF - !!test_bit(SND_BELL, sunkbd->dev->snd));
	}

	static void sunkbd_enable(struct sunkbd *sunkbd, bool enable)
	{
	serio_pause_rx(sunkbd->serio);
	sunkbd->enabled = enable;
	serio_continue_rx(sunkbd->serio);
	}

	/*
	* sunkbd_connect() probes for a Sun keyboard and fills the necessary
	* structures.
	*/

	static int sunkbd_connect(struct serio serio, struct serio_driver drv)
	{
	struct sunkbd *sunkbd;
	struct input_dev *input_dev;
	int err = -ENOMEM;
	int i;

	sunkbd = kzalloc(sizeof(struct sunkbd), GFP_KERNEL);
	input_dev = input_allocate_device();
	if (!sunkbd \|\| !input_dev)
	goto fail1;

	sunkbd->serio = serio;
	sunkbd->dev = input_dev;
	init_waitqueue_head(&sunkbd->wait);
	INIT_WORK(&sunkbd->tq, sunkbd_reinit);
	snprintf(sunkbd->phys, sizeof(sunkbd->phys), "%s/input0", serio->phys);

	serio_set_drvdata(serio, sunkbd);

	err = serio_open(serio, drv);
	if (err)
	goto fail2;

	if (sunkbd_initialize(sunkbd) < 0) {
	err = -ENODEV;
	goto fail3;
	}

	snprintf(sunkbd->name, sizeof(sunkbd->name),
	"Sun Type %d keyboard", sunkbd->type);
	memcpy(sunkbd->keycode, sunkbd_keycode, sizeof(sunkbd->keycode));

	input_dev->name = sunkbd->name;
	input_dev->phys = sunkbd->phys;
	input_dev->id.bustype = BUS_RS232;
	input_dev->id.vendor = SERIO_SUNKBD;
	input_dev->id.product = sunkbd->type;
	input_dev->id.version = 0x0100;
	input_dev->dev.parent = &serio->dev;

	input_set_drvdata(input_dev, sunkbd);

	input_dev->event = sunkbd_event;

	input_dev->evbit[0] = BIT_MASK(EV_KEY) \| BIT_MASK(EV_LED) \|
	BIT_MASK(EV_SND) \| BIT_MASK(EV_REP);
	input_dev->ledbit[0] = BIT_MASK(LED_CAPSL) \| BIT_MASK(LED_COMPOSE) \|
	BIT_MASK(LED_SCROLLL) \| BIT_MASK(LED_NUML);
	input_dev->sndbit[0] = BIT_MASK(SND_CLICK) \| BIT_MASK(SND_BELL);

	input_dev->keycode = sunkbd->keycode;
	input_dev->keycodesize = sizeof(unsigned char);
	input_dev->keycodemax = ARRAY_SIZE(sunkbd_keycode);
	for (i = 0; i < ARRAY_SIZE(sunkbd_keycode); i++)
	__set_bit(sunkbd->keycode[i], input_dev->keybit);
	__clear_bit(KEY_RESERVED, input_dev->keybit);

	sunkbd_enable(sunkbd, true);

	err = input_register_device(sunkbd->dev);
	if (err)
	goto fail4;

	return 0;

	fail4: sunkbd_enable(sunkbd, false);
	fail3: serio_close(serio);
	fail2: serio_set_drvdata(serio, NULL);
	fail1: input_free_device(input_dev);
	kfree(sunkbd);
	return err;
	}

	/*
	* sunkbd_disconnect() unregisters and closes behind us.
	*/

	static void sunkbd_disconnect(struct serio *serio)
	{
	struct sunkbd *sunkbd = serio_get_drvdata(serio);

	sunkbd_enable(sunkbd, false);
	input_unregister_device(sunkbd->dev);
	serio_close(serio);
	serio_set_drvdata(serio, NULL);
	kfree(sunkbd);
	}

	static struct serio_device_id sunkbd_serio_ids[] = {
	{
	.type = SERIO_RS232,
	.proto = SERIO_SUNKBD,
	.id = SERIO_ANY,
	.extra = SERIO_ANY,
	},
	{
	.type = SERIO_RS232,
	.proto = SERIO_UNKNOWN, /* sunkbd does probe */
	.id = SERIO_ANY,
	.extra = SERIO_ANY,
	},
	{ 0 }
	};

	MODULE_DEVICE_TABLE(serio, sunkbd_serio_ids);

	static struct serio_driver sunkbd_drv = {
	.driver = {
	.name = "sunkbd",
	},
	.description = DRIVER_DESC,
	.id_table = sunkbd_serio_ids,
	.interrupt = sunkbd_interrupt,
	.connect = sunkbd_connect,
	.disconnect = sunkbd_disconnect,
	};

	module_serio_driver(sunkbd_drv);