/* * include/linux/serial.h * * Copyright (C) 1992 by Theodore Ts'o. *  * Redistribution of this file is permitted under the terms of the GNU  * Public License (GPL) */#ifndef _LINUX_SERIAL_H#define _LINUX_SERIAL_H#ifdef __KERNEL__#include <asm/page.h>/* * Counters of the input lines (CTS, DSR, RI, CD) interrupts */struct async_icount {	__u32	cts, dsr, rng, dcd, tx, rx;	__u32	frame, parity, overrun, brk;	__u32	buf_overrun;};/* * The size of the serial xmit buffer is 1 page, or 4096 bytes */#define SERIAL_XMIT_SIZE PAGE_SIZE#endifstruct serial_struct {	int	type;	int	line;	unsigned int	port;	int	irq;	int	flags;	int	xmit_fifo_size;	int	custom_divisor;	int	baud_base;	unsigned short	close_delay;	char	io_type;	char	reserved_char[1];	int	hub6;	unsigned short	closing_wait; /* time to wait before closing */	unsigned short	closing_wait2; /* no longer used... */	unsigned char	*iomem_base;	unsigned short	iomem_reg_shift;	unsigned int	port_high;	int	reserved[1];};/* * For the close wait times, 0 means wait forever for serial port to * flush its output.  65535 means don't wait at all. */#define ASYNC_CLOSING_WAIT_INF	0#define ASYNC_CLOSING_WAIT_NONE	65535/* * These are the supported serial types. */#define PORT_UNKNOWN	0#define PORT_8250	1#define PORT_16450	2#define PORT_16550	3#define PORT_16550A	4#define PORT_CIRRUS     5	/* usurped by cyclades.c */#define PORT_16650	6#define PORT_16650V2	7#define PORT_16750	8#define PORT_STARTECH	9	/* usurped by cyclades.c */#define PORT_16C950	10	/* Oxford Semiconductor */#define PORT_16654	11#define PORT_16850	12#define PORT_RSA	13	/* RSA-DV II/S card */#define PORT_DSC21      14#define PORT_MAX	14#define SERIAL_IO_PORT	0#define SERIAL_IO_HUB6	1#define SERIAL_IO_MEM	2#define SERIAL_IO_GSC	3struct serial_uart_config {	char	*name;	int	dfl_xmit_fifo_size;	int	flags;};#define UART_CLEAR_FIFO		0x01#define UART_USE_FIFO		0x02#define UART_STARTECH		0x04/* * Definitions for async_struct (and serial_struct) flags field */#define ASYNC_HUP_NOTIFY 0x0001 /* Notify getty on hangups and closes 				   on the callout port */#define ASYNC_FOURPORT  0x0002	/* Set OU1, OUT2 per AST Fourport settings */#define ASYNC_SAK	0x0004	/* Secure Attention Key (Orange book) */#define ASYNC_SPLIT_TERMIOS 0x0008 /* Separate termios for dialin/callout */#define ASYNC_SPD_MASK	0x1030#define ASYNC_SPD_HI	0x0010	/* Use 56000 instead of 38400 bps */#define ASYNC_SPD_VHI	0x0020  /* Use 115200 instead of 38400 bps */#define ASYNC_SPD_CUST	0x0030  /* Use user-specified divisor */#define ASYNC_SKIP_TEST	0x0040 /* Skip UART test during autoconfiguration */#define ASYNC_AUTO_IRQ  0x0080 /* Do automatic IRQ during autoconfiguration */#define ASYNC_SESSION_LOCKOUT 0x0100 /* Lock out cua opens based on session */#define ASYNC_PGRP_LOCKOUT    0x0200 /* Lock out cua opens based on pgrp */#define ASYNC_CALLOUT_NOHUP   0x0400 /* Don't do hangups for cua device */#define ASYNC_HARDPPS_CD	0x0800	/* Call hardpps when CD goes high  */#define ASYNC_SPD_SHI	0x1000	/* Use 230400 instead of 38400 bps */#define ASYNC_SPD_WARP	0x1010	/* Use 460800 instead of 38400 bps */#define ASYNC_LOW_LATENCY 0x2000 /* Request low latency behaviour */#define ASYNC_BUGGY_UART  0x4000 /* This is a buggy UART, skip some safety				  * checks.  Note: can be dangerous! */#define ASYNC_AUTOPROBE	 0x8000 /* Port was autoprobed by PCI or PNP code */#define ASYNC_FLAGS	0x7FFF	/* Possible legal async flags */#define ASYNC_USR_MASK	0x3430	/* Legal flags that non-privileged				 * users can set or reset *//* Internal flags used only by kernel/chr_drv/serial.c */#define ASYNC_INITIALIZED	0x80000000 /* Serial port was initialized */#define ASYNC_CALLOUT_ACTIVE	0x40000000 /* Call out device is active */#define ASYNC_NORMAL_ACTIVE	0x20000000 /* Normal device is active */#define ASYNC_BOOT_AUTOCONF	0x10000000 /* Autoconfigure port on bootup */#define ASYNC_CLOSING		0x08000000 /* Serial port is closing */#define ASYNC_CTS_FLOW		0x04000000 /* Do CTS flow control */#define ASYNC_CHECK_CD		0x02000000 /* i.e., CLOCAL */#define ASYNC_SHARE_IRQ		0x01000000 /* for multifunction cards					     --- no longer used */#define ASYNC_CONS_FLOW		0x00800000 /* flow control for console  */#define ASYNC_BOOT_ONLYMCA	0x00400000 /* Probe only if MCA bus */#define ASYNC_INTERNAL_FLAGS	0xFFC00000 /* Internal flags *//* * Multiport serial configuration structure --- external structure */struct serial_multiport_struct {	int		irq;	int		port1;	unsigned char	mask1, match1;	int		port2;	unsigned char	mask2, match2;	int		port3;	unsigned char	mask3, match3;	int		port4;	unsigned char	mask4, match4;	int		port_monitor;	int	reserved[32];};/* * Serial input interrupt line counters -- external structure * Four lines can interrupt: CTS, DSR, RI, DCD */struct serial_icounter_struct {	int cts, dsr, rng, dcd;	int rx, tx;	int frame, overrun, parity, brk;	int buf_overrun;	int reserved[9];};#ifdef __KERNEL__/* Export to allow PCMCIA to use this - Dave Hinds */extern int register_serial(struct serial_struct *req);extern void unregister_serial(int line);/* Allow complicated architectures to specify rs_table[] at run time */extern int early_serial_setup(struct serial_struct *req);#ifdef CONFIG_ACPI/* tty ports reserved for the ACPI serial console port and debug port */#define ACPI_SERIAL_CONSOLE_PORT        4#define ACPI_SERIAL_DEBUG_PORT          5#endif#endif /* __KERNEL__ */#endif /* _LINUX_SERIAL_H */