/*
 * Private header file for the (dumb) serial driver
 *
 * Copyright (C) 1997 by Theodore Ts'o.
 * 
 * Redistribution of this file is permitted under the terms of the GNU 
 * Public License (GPL)
 */

#ifndef _LINUX_SERIALP_H
#define _LINUX_SERIALP_H

/*
 * This is our internal structure for each serial port's state.
 * 
 * Many fields are paralleled by the structure used by the serial_struct
 * structure.
 *
 * For definitions of the flags field, see tty.h
 */

#include <linux/config.h>
#include <linux/termios.h>
#include <linux/tqueue.h>
#include <linux/wait.h>
#ifdef CONFIG_PCI
#include <linux/pci.h>
#endif

/*
 * 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;
};

struct serial_state {
	int	magic;
	int	baud_base;
	int	port;
	int	irq;
	int	flags;
	int	hub6;
	int	type;
	int	line;
	int	revision;	/* Chip revision (950) */
	int	xmit_fifo_size;
	int	custom_divisor;
	int	count;
	u8	*iomem_base;
	u16	iomem_reg_shift;
	unsigned short	close_delay;
	unsigned short	closing_wait; /* time to wait before closing */
	struct async_icount	icount;	
	struct termios		normal_termios;
	struct termios		callout_termios;
	struct async_struct *info;
};

struct async_struct {
	int			magic;
	int			port;
	int			hub6;
	int			flags;
	int			xmit_fifo_size;
	struct serial_state	*state;
	struct tty_struct 	*tty;
	int			read_status_mask;
	int			ignore_status_mask;
	int			timeout;
	int			quot;
	int			x_char;	/* xon/xoff character */
	int			close_delay;
	unsigned short		closing_wait;
	unsigned short		closing_wait2;
	int			IER; 	/* Interrupt Enable Register */
	int			MCR; 	/* Modem control register */
	int			LCR; 	/* Line control register */
	int			ACR;	 /* 16950 Additional Control Reg. */
	unsigned long		event;
	unsigned long		last_active;
	int			line;
	int			blocked_open; /* # of blocked opens */
	long			session; /* Session of opening process */
	long			pgrp; /* pgrp of opening process */
	unsigned char 		*xmit_buf;
	int			xmit_head;
	int			xmit_tail;
	int			xmit_cnt;
	u8			*iomem_base;
	u16			iomem_reg_shift;
	struct tq_struct	tqueue;
#ifdef DECLARE_WAITQUEUE
	wait_queue_head_t	open_wait;
	wait_queue_head_t	close_wait;
	wait_queue_head_t	delta_msr_wait;
#else	
	struct wait_queue	*open_wait;
	struct wait_queue	*close_wait;
	struct wait_queue	*delta_msr_wait;
#endif	
	struct async_struct	*next_port; /* For the linked list */
	struct async_struct	*prev_port;
};

#define CONFIGURED_SERIAL_PORT(info) ((info)->port || ((info)->iomem_base))

#define SERIAL_MAGIC 0x5301
#define SSTATE_MAGIC 0x5302

/*
 * The size of the serial xmit buffer is 1 page, or 4096 bytes
 */
#define SERIAL_XMIT_SIZE 4096

/*
 * Events are used to schedule things to happen at timer-interrupt
 * time, instead of at rs interrupt time.
 */
#define RS_EVENT_WRITE_WAKEUP	0

/*
 * Multiport serial configuration structure --- internal structure
 */
struct rs_multiport_struct {
	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;
};

#if defined(__alpha__) && !defined(CONFIG_PCI)
/*
 * Digital did something really horribly wrong with the OUT1 and OUT2
 * lines on at least some ALPHA's.  The failure mode is that if either
 * is cleared, the machine locks up with endless interrupts.
 */
#define ALPHA_KLUDGE_MCR  (UART_MCR_OUT2 | UART_MCR_OUT1)
#else
#define ALPHA_KLUDGE_MCR 0
#endif

#ifdef CONFIG_PCI
/*
 * Structures and definitions for PCI support
 */
struct pci_board {
	unsigned short vendor;
	unsigned short device;
	unsigned short subvendor;
	unsigned short subdevice;
	int flags;
	int num_ports;
	int base_baud;
	int uart_offset;
	int reg_shift;
	void (*init_fn)(struct pci_dev *dev, struct pci_board *board,
			int enable);
};

struct pci_board_inst {
	struct pci_board	*board;
	struct pci_dev		*dev;
};

#ifndef PCI_ANY_ID
#define PCI_ANY_ID (~0)
#endif
#endif

#define SPCI_FL_BASE_MASK	0x0007
#define SPCI_FL_BASE0	0x0000
#define SPCI_FL_BASE1	0x0001
#define SPCI_FL_BASE2	0x0002
#define SPCI_FL_BASE3	0x0003
#define SPCI_FL_BASE4	0x0004
#define SPCI_FL_IOMEM		0x0008 /* Use I/O mapped memory */
#define SPCI_FL_BASE_TABLE	0x0010 /* Use base address table for UART */

#endif /* _LINUX_SERIAL_H */