mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-29 23:53:55 +08:00
1da177e4c3
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
150 lines
2.9 KiB
C
150 lines
2.9 KiB
C
/*
|
|
* $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");
|
|
}
|