94 struct uart_8250_port {  struct
95 	struct uart_port	port;
96 	struct timer_list	timer;		/* "no irq" timer */
97 	struct list_head	list;		/* ports on this IRQ */
98 	u32			capabilities;	/* port capabilities */
99 	unsigned short		bugs;		/* port bugs */
100 	bool			fifo_bug;	/* min RX trigger if enabled */
101 	unsigned int		tx_loadsz;	/* transmit fifo load size */
102 	unsigned char		acr;
103 	unsigned char		fcr;
104 	unsigned char		ier;
105 	unsigned char		lcr;
106 	unsigned char		mcr;
107 	unsigned char		mcr_mask;	/* mask of user bits */
108 	unsigned char		mcr_force;	/* mask of forced bits */
132 	int			(*dl_read)(struct uart_8250_port *);  argument
133 	void			(*dl_write)(struct uart_8250_port *, int);  argument
136 	void			(*rs485_start_tx)(struct uart_8250_port *);  argument
137 	void			(*rs485_stop_tx)(struct uart_8250_port *);  argument
144 static inline struct uart_8250_port *up_to_u8250p(struct uart_port *up)  in up_to_u8250p()  argument