Help me provide more advice

For more information, see Linux general technology-Linux programming and kernel. I want to write a serial port driver. I have a linux Device Driver in my hand. I don't know much about it. Please help me! Some of my frameworks are as follows:
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# Include


Static struct tty_driver * serial_driver;

Static void serial_close (struct tty_struct * tty, struct file * filp)
{

}

Static void serial_unthrottle (struct tty_struct * tty)
{

}
Static int serial_write (struct tty_struct * tty, const unsigned char * buf, int count)
{

}

Static int serial_write_room (struct tty_struct * tty)
{

}

Static int serial_chars_in_buffer (struct tty_struct * tty)
{

}


Static int serial_set_lock (struct tty_struct * tty, int _ user * arg)
{

}

Static void serial_flush_buffer (struct tty_struct * tty)
{

}

Static int serial_open (struct tty_struct * tty, struct file * filp)
{

}

Static void serial_set_termios (struct tty_struct * tty, struct termios * old_termios)
{

}
Static struct tty_operations serial_ops = {
. Open = serial_open,
. Close = serial_close,
. Flush_buffer = serial_flush_buffer,
. Chars_in_buffer = serial_chars_in_buffer,
. Unthrottle = serial_unthrottle,
. Set_termios = serial_set_termios,

};

Static void _ init serial_driver_init (void)
{

Serial_driver = alloc_tty_driver ();

If (! Serial_driver)
{
Panic ("Couldn't allocate the driver ");
}

Serial_driver-> owner = THIS_MODULE;
Serial_driver-> driver_name =;
Serial_driver-> name =;
Serial_driver-> major =;
Serial_driver-> minor_start =;
Serial_driver-> type =;
Serial_driver-> subtype =;
Serial_driver-> init_termios =;
Serial_driver-> init_termios.c_iflag =;
Serial_driver-> init_termios.c_oflag =;
Serial_driver-> init_termios.c_cflag =;
Serial_driver-> init_termios.c_lflag =;
Serial_driver-> flags = TTY_DRIVER_RESET_TERMIOS | TTY_DRIVER_REAL_RAW | TTY_DRIVER_NO_DEVFS;

Serial_driver-> other =;
Serial_driver-> ioctl =;

Tty_set_operations (serial_driver, & serial_ops );

If (tty_register_driver (serial_driver ))
Panic ("Couldn't register the driver ");
}

Static void _ exit serial_driver_exit (void)
{

}

Module_init (serial_driver_init );
Module_exit (serial_driver_init );