Input: remove scan_keyb driver

/*

 *	$Id: scan_keyb.c,v 1.2 2000/07/04 06:24:42 yaegashi Exp $ 

 *	Copyright (C) 2000 YAEGASHI Takeshi

 *	Generic scan keyboard driver

 */

#include <linux/spinlock.h>

#include <linux/sched.h>

#include <linux/interrupt.h>

#include <linux/tty.h>

#include <linux/mm.h>

#include <linux/signal.h>

#include <linux/init.h>

#include <linux/kbd_ll.h>

#include <linux/delay.h>

#include <linux/random.h>

#include <linux/poll.h>

#include <linux/miscdevice.h>

#include <linux/slab.h>

#include <linux/kbd_kern.h>

#include <linux/timer.h>

#define SCANHZ	(HZ/20)

struct scan_keyboard {

	struct scan_keyboard *next;

	int (*scan)(unsigned char *buffer);

	const unsigned char *table;

	unsigned char *s0, *s1;

	int length;

};

static int scan_jiffies=0;

static struct scan_keyboard *keyboards=NULL;

struct timer_list scan_timer;

static void check_kbd(const unsigned char *table,

		      unsigned char *new, unsigned char *old, int length)

{

	int need_tasklet_schedule=0;

	unsigned int xor, bit;

	while(length-->0) {

		if((xor=*new^*old)==0) {

			table+=8;

		}

		else {

			for(bit=0x01; bit<0x100; bit<<=1) {

				if(xor&bit) {

					handle_scancode(*table, !(*new&bit));

					need_tasklet_schedule=1;

#if 0

					printk("0x%x %s\n", *table, (*new&bit)?"released":"pressed");

#endif

				}

				table++;

			}

		}

		new++; old++;

	}

	if(need_tasklet_schedule)

		tasklet_schedule(&keyboard_tasklet);

}

static void scan_kbd(unsigned long dummy)

{

	struct scan_keyboard *kbd;

	scan_jiffies++;

	for(kbd=keyboards; kbd!=NULL; kbd=kbd->next) {

		if(scan_jiffies&1) {

			if(!kbd->scan(kbd->s0))

				check_kbd(kbd->table,

					  kbd->s0, kbd->s1, kbd->length);

			else

				memcpy(kbd->s0, kbd->s1, kbd->length);

		}

		else {

			if(!kbd->scan(kbd->s1))

				check_kbd(kbd->table,

					  kbd->s1, kbd->s0, kbd->length);

			else

				memcpy(kbd->s1, kbd->s0, kbd->length);

		}

	}

	init_timer(&scan_timer);

	scan_timer.expires = jiffies + SCANHZ;

	scan_timer.data = 0;

	scan_timer.function = scan_kbd;

	add_timer(&scan_timer);

}

int register_scan_keyboard(int (*scan)(unsigned char *buffer),

			   const unsigned char *table,

			   int length)

{

	struct scan_keyboard *kbd;

	kbd = kmalloc(sizeof(struct scan_keyboard), GFP_KERNEL);

	if (kbd == NULL)

		goto error_out;

	kbd->scan=scan;

	kbd->table=table;

	kbd->length=length;

	kbd->s0 = kmalloc(length, GFP_KERNEL);

	if (kbd->s0 == NULL)

		goto error_free_kbd;

	kbd->s1 = kmalloc(length, GFP_KERNEL);

	if (kbd->s1 == NULL)

		goto error_free_s0;

	memset(kbd->s0, -1, kbd->length);

	memset(kbd->s1, -1, kbd->length);

	kbd->next=keyboards;

	keyboards=kbd;

	return 0;

 error_free_s0:

	kfree(kbd->s0);

 error_free_kbd:

	kfree(kbd);

 error_out:

	return -ENOMEM;

}

void __init scan_kbd_init(void)

{

	init_timer(&scan_timer);

	scan_timer.expires = jiffies + SCANHZ;

	scan_timer.data = 0;

	scan_timer.function = scan_kbd;

	add_timer(&scan_timer);

	printk(KERN_INFO "Generic scan keyboard driver initialized\n");

}

#ifndef	__DRIVER_CHAR_SCAN_KEYB_H

#define	__DRIVER_CHAR_SCAN_KEYB_H

/*

 *	$Id: scan_keyb.h,v 1.1 2000/06/10 21:45:30 yaegashi Exp $

 *	Copyright (C) 2000 YAEGASHI Takeshi

 *	Generic scan keyboard driver

 */

int register_scan_keyboard(int (*scan)(unsigned char *buffer),

			   const unsigned char *table,

			   int length);

void __init scan_kbd_init(void);

#endif