static struct file* open_port (void)
{
struct file* port;
struct tty_struct *tty;
mm_segment_t oldfs;

        oldfs=get_fs();
        set_fs(KERNEL_DS);

        port = filp_open(PHY_TTY, O_RDWR | O_NONBLOCK, 0666);
        if (port == NULL)
        {
                printk(KERN_ERR "PORT: can't open PHY port '%s'\n", PHY_TTY);
                goto exit;
        }


        tty=(struct tty_struct*)port->private_data;

        tty->termios.c_cc[VTIME] = 20;
        tty->termios.c_cc[VMIN] = 0;
        tty->termios.c_cflag &= ~PARENB;
        tty->termios.c_cflag &= ~CSTOPB;
        tty->termios.c_cflag &= ~CSIZE;  
        tty->termios.c_cflag |= CS8;  
        tty->termios.c_cflag |= B115200;

        tty->termios.c_lflag = 0;
        tty->termios.c_oflag &= ~OPOST;

        tty->termios.c_iflag = 0;
        tty->termios.c_iflag &= ~ (INLCR | IGNCR | ICRNL);


exit:
        set_fs(oldfs);
        return port;
}