#include <linux/config.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <asm/delay.h>
#include <asm/uaccess.h>
#include <linux/fs.h>
#include <linux/devfs_fs_kernel.h>
#include <linux/sched.h>
#include <asm/hardware.h>
//#undef DEBUG
#define DEBUG
#ifdef DEBUG
#define DPRINTK(x... ) printk("s3c44b0_key:"##x)
#else
#define DPRINTK(x...)
#endif
#define DEVICE_NAME "s3c44b0-key"
#define KEYMinor 1
static int KEYMajor = 0;
static int s3c44b0_KEY_read(struct file *filp, char *buf, size_t count,loff_t *f_pos)
{
return 0;
}
static int s3c44b0_KEY_open(struct inode *inode,struct file *filp)
{
MOD_INC_USE_COUNT;
DPRINTK("open\n");
return 0;
}
static int s3c44b0_KEY_release(struct inode *inode, struct file *filp)
{
MOD_DEC_USE_COUNT;
DPRINTK("release\n");
return 0;
}
static struct file_operations s3c44b0_fops = {
owner: THIS_MODULE,
open: s3c44b0_KEY_open,
write: s3c44b0_KEY_read,
release:s3c44b0_KEY_release,
};
static void s3c44b0x_KEY_isr(int irq,void *dev_id,struct pt_regs *regs)
{
switch(irq)
{
case 24:
printk("A\n");
break;
case 25:
printk("B\n");
break;
}
*((volatile unsigned int*)S3C44B0X_I_ISPC)=(0x1<<irq);
}
#ifdef CONFIG_DEVFS_FS
static devfs_handle_t devfs_s3c44b0_dir,devfs_s3c44b0raw;
#endif
static int __init s3c44b0_KEY_init(void)
{
int ret;
ret = register_chrdev(KEYMajor,DEVICE_NAME,&s3c44b0_fops);
if(ret<0)
{
printk(DEVICE_NAME "can't get major number\n");
return ret;
}
KEYMajor = ret;
#ifdef CONFIG_DEVFS_FS
devfs_s3c44b0_dir=devfs_mk_dir(NULL,"key",NULL);
devfs_s3c44b0raw=devfs_register(devfs_s3c44b0_dir,"0",DEVFS_FL_DEFAULT,KEYMajor,\
KEYMinor,S_IFCHR|S_IRUSR|S_IWUSR,&s3c44b0_fops,NULL);
#endif
if(request_irq(24,s3c44b0x_KEY_isr,SA_INTERRUPT,DEVICE_NAME,NULL)<0)
DPRINTK("Failed to register IRQ 24\n");
if(request_irq(25,s3c44b0x_KEY_isr,SA_INTERRUPT,DEVICE_NAME,NULL)<0)
DPRINTK("Failed to register IRQ 25\n");
printk(DEVICE_NAME "initialized IRQ 24 25\n");
return 0;
}
static void __exit s3c44b0_KEY_exit(void)
{
free_irq(24,NULL);
free_irq(25,NULL);
#ifdef CONFIG_DEVFS_FS
devfs_unregister(devfs_s3c44b0raw);
devfs_unregister(devfs_s3c44b0_dir);
#endif
unregister_chrdev(KEYMajor, DEVICE_NAME);
}
module_init(s3c44b0_KEY_init);
module_exit(s3c44b0_KEY_exit);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("ZCY");
MODULE_DESCRIPTION("SEG7 driver fo EB44b0");
