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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 */
-