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root/bsp/drv/include/tty.h

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   1 /*-
   2  * Copyright (c) 1982, 1986, 1993
   3  *      The Regents of the University of California.  All rights reserved.
   4  * (c) UNIX System Laboratories, Inc.
   5  * All or some portions of this file are derived from material licensed
   6  * to the University of California by American Telephone and Telegraph
   7  * Co. or Unix System Laboratories, Inc. and are reproduced herein with
   8  * the permission of UNIX System Laboratories, Inc.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions
  12  * are met:
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  * 3. Neither the name of the University nor the names of its contributors
  19  *    may be used to endorse or promote products derived from this software
  20  *    without specific prior written permission.
  21  *
  22  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  23  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  24  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  25  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  26  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  27  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  28  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  29  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  30  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  31  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  32  * SUCH DAMAGE.
  33  *
  34  *      @(#)tty.h       8.7 (Berkeley) 1/9/95
  35  */
  37 #ifndef _SYS_TTY_H_
  38 #define _SYS_TTY_H_
  40 #include <sys/cdefs.h>
  41 #include <sys/termios.h>
  42 #include <sys/syslimits.h>
  44 #define TTYQ_SIZE       MAX_INPUT
  45 #define TTYQ_HIWAT      (TTYQ_SIZE - 10)
  47 struct tty_queue {
  48         char    tq_buf[TTYQ_SIZE];
  49         int     tq_head;
  50         int     tq_tail;
  51         int     tq_count;
  52 };
  54 /*
  55  * Per-tty structure.
  56  */
  57 struct tty {
  58         struct tty_queue t_rawq;        /* raw input queue */
  59         struct tty_queue t_canq;        /* canonical queue */
  60         struct tty_queue t_outq;        /* ouput queue */
  61         struct termios  t_termios;      /* termios state */
  62         struct winsize  t_winsize;      /* window size */
  63         struct event    t_input;        /* event for input data ready */
  64         struct event    t_output;       /* event for output completion */
  65         void (*t_oproc)(struct tty *);  /* routine to start output */
device_t        t_dev;          /* device */
  67         int             t_state;        /* driver state */
  68         int             t_column;       /* tty output column */
pid_t           t_pgid;         /* foreground process group. */
task_t          t_sigtask;      /* task to dispatch the tty signal */
  71         int             t_signo;        /* pending signal# */
  72         struct dpc      t_dpc;          /* dpc for tty */
  73 };
  75 #define t_iflag         t_termios.c_iflag
  76 #define t_oflag         t_termios.c_oflag
  77 #define t_cflag         t_termios.c_cflag
  78 #define t_lflag         t_termios.c_lflag
  79 #define t_cc            t_termios.c_cc
  80 #define t_ispeed        t_termios.c_ispeed
  81 #define t_ospeed        t_termios.c_ospeed
  83 /* These flags are kept in t_state. */
  84 #define TS_ASLEEP       0x00001         /* Process waiting for tty. */
  85 #define TS_BUSY         0x00004         /* Draining output. */
  86 #define TS_TIMEOUT      0x00100         /* Wait for output char processing. */
  87 #define TS_TTSTOP       0x00200         /* Output paused. */
  88 #define TS_ISIG         0x00400         /* Input is interrupted by signal. */
__BEGIN_DECLS
  91 int      tty_read(struct tty *, char *, size_t *);
  92 int      tty_write(struct tty *, char *, size_t *);
  93 int      tty_ioctl(struct tty *, u_long, void *);
  94 void     tty_input(int, struct tty *);
  95 int      tty_getc(struct tty_queue *);
  96 void     tty_done(struct tty *);
  97 void     tty_attach(struct tty *);
__END_DECLS
 100 #endif /* !_SYS_TTY_H_ */