/*
 $Id: os2004beep.c,v 1.3 2004/12/23 12:47:14 kaiya Exp kaiya $
 Device Driver for system speaker (Beep!)
 */

#define MOD_NAME "os2004"

#define BEEP_PORT 0x0061 /* I/O port of system speaker */

// #define CONFIG_X86_L1_CACHE_SHIFT (5)

#include <linux/module.h>
#include <linux/kernel.h>

#include <asm/io.h>

static int xxx_open(struct inode *inode, struct file *file){
int minor;
unsigned int data=0xff;

	minor = MINOR(inode->i_rdev);
	printk("<1>open <%s io driver>: minor = %d\n", MOD_NAME, minor);

    outb(data, BEEP_PORT);

	return(0);
}

static int xxx_release(struct inode *inode, struct file *file){
int minor;
unsigned int data=0x0;

	minor = MINOR(inode->i_rdev);
	printk("<1>release <%s io driver>: minor = %d\n", MOD_NAME, minor);

    outb(data, BEEP_PORT);

	return(0);
}

static struct file_operations xxx_fops = {
  NULL, // owner
  NULL,  // llseek
  NULL, // xxx_read,
  NULL, // xxx_write,
  NULL,  // readdir
  NULL,  // poll
  NULL, // xxx_ioctl,
  NULL,  // mmap
  xxx_open,
  NULL,  // flush
  xxx_release,
  NULL,  // fsync
  NULL,  // fasync
  NULL,   // lock
  NULL,  // readv
  NULL,  // writev
  NULL,  // sendpage
  NULL,  // get_unmapped_area
};

static int xxx_major;

int init_module(void){
  xxx_major = register_chrdev(0, MOD_NAME, &xxx_fops);
  printk("<1>os2004beep driver [%s] installed:  major = %d\n",
  	MOD_NAME, xxx_major);
  return(0);
}

void cleanup_module(void){
  printk("<1>os2004beep driver [%s] uninstalled\n", MOD_NAME);
  unregister_chrdev(xxx_major, MOD_NAME);
}