299 struct uart_port {  struct
303 	unsigned int		(*serial_in)(struct uart_port *, int);  argument
304 	void			(*serial_out)(struct uart_port *, int, int);  argument
305 	void			(*set_termios)(struct uart_port *,  argument
308 	int			(*handle_irq)(struct uart_port *);  argument
309 	void			(*pm)(struct uart_port *, unsigned int state,  argument
311 	unsigned int		irq;			/* irq number */
312 	unsigned long		irqflags;		/* irq flags  */
313 	unsigned int		uartclk;		/* base uart clock */
314 	unsigned int		fifosize;		/* tx fifo size */
315 	unsigned char		x_char;			/* xon/xoff char */
316 	unsigned char		regshift;		/* reg offset shift */
317 	unsigned char		iotype;			/* io access style */
318 	unsigned char		unused1;
328 	unsigned int		read_status_mask;	/* driver specific */
329 	unsigned int		ignore_status_mask;	/* driver specific */
330 	struct uart_state	*state;			/* pointer to parent state */
331 	struct uart_icount	icount;			/* statistics */
333 	struct console		*cons;			/* struct console, if any */
335 	unsigned long		sysrq;			/* sysrq timeout */
338 	upf_t			flags;
369 	unsigned int		mctrl;			/* current modem ctrl settings */
393 	struct uart_port	*uart_port;  argument