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path: root/drivers/char/scan_keyb.c
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Diffstat (limited to 'drivers/char/scan_keyb.c')
-rw-r--r--drivers/char/scan_keyb.c149
1 files changed, 0 insertions, 149 deletions
diff --git a/drivers/char/scan_keyb.c b/drivers/char/scan_keyb.c
deleted file mode 100644
index 2b5bb4f5754d..000000000000
--- a/drivers/char/scan_keyb.c
+++ /dev/null
@@ -1,149 +0,0 @@
-/*
- * $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");
-}