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/*
* 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/termios.h>
#include <linux/tqueue.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;
};
struct serial_state {
int magic;
int baud_base;
int port;
int irq;
int flags;
int hub6;
int type;
int line;
int xmit_fifo_size;
int custom_divisor;
int count;
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 */
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;
struct tq_struct tqueue;
struct wait_queue *open_wait;
struct wait_queue *close_wait;
struct wait_queue *delta_msr_wait;
struct async_struct *next_port; /* For the linked list */
struct async_struct *prev_port;
};
#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;
};
#endif /* _LINUX_SERIAL_H */
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