335 lines
8.8 KiB
C
335 lines
8.8 KiB
C
/* $NetBSD: tty_conf.c,v 1.45 2005/04/10 14:28:11 itohy Exp $ */
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/*-
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* Copyright (c) 1982, 1986, 1991, 1993
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* The Regents of the University of California. All rights reserved.
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* (c) UNIX System Laboratories, Inc.
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* All or some portions of this file are derived from material licensed
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* to the University of California by American Telephone and Telegraph
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* Co. or Unix System Laboratories, Inc. and are reproduced herein with
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* the permission of UNIX System Laboratories, Inc.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)tty_conf.c 8.5 (Berkeley) 1/9/95
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: tty_conf.c,v 1.45 2005/04/10 14:28:11 itohy Exp $");
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#include "opt_compat_freebsd.h"
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#include "opt_compat_43.h"
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/buf.h>
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#include <sys/ioctl.h>
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#include <sys/proc.h>
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#include <sys/tty.h>
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#include <sys/ioctl.h>
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#include <sys/ttycom.h>
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#include <sys/conf.h>
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#include <sys/malloc.h>
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#include "tb.h"
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#if NTB > 0
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int tbopen(dev_t dev, struct tty *tp);
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int tbclose(struct tty *tp, int flags);
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int tbread(struct tty *tp, struct uio *uio, int flags);
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int tbtioctl(struct tty *tp, u_long cmd, caddr_t data,
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int flag, struct proc *p);
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int tbinput(int c, struct tty *tp);
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#endif
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#include "sl.h"
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#if NSL > 0
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int slopen(dev_t dev, struct tty *tp);
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int slclose(struct tty *tp, int flags);
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int sltioctl(struct tty *tp, u_long cmd, caddr_t data,
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int flag, struct proc *p);
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int slinput(int c, struct tty *tp);
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int slstart(struct tty *tp);
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#endif
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#include "ppp.h"
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#if NPPP > 0
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int pppopen(dev_t dev, struct tty *tp);
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int pppclose(struct tty *tp, int flags);
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int ppptioctl(struct tty *tp, u_long cmd, caddr_t data,
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int flag, struct proc *p);
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int pppinput(int c, struct tty *tp);
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int pppstart(struct tty *tp);
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int pppread(struct tty *tp, struct uio *uio, int flag);
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int pppwrite(struct tty *tp, struct uio *uio, int flag);
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#endif
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#include "strip.h"
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#if NSTRIP > 0
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int stripopen(dev_t dev, struct tty *tp);
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int stripclose(struct tty *tp, int flags);
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int striptioctl(struct tty *tp, u_long cmd, caddr_t data,
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int flag, struct proc *p);
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int stripinput(int c, struct tty *tp);
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int stripstart(struct tty *tp);
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#endif
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#include "irframetty.h"
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#if NIRFRAMETTY > 0
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int irframetopen(dev_t dev, struct tty *tp);
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int irframetclose(struct tty *tp, int flags);
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int irframetioctl(struct tty *tp, u_long cmd, caddr_t data,
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int flag, struct proc *p);
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int irframetinput(int c, struct tty *tp);
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int irframetstart(struct tty *tp);
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int irframetread(struct tty *tp, struct uio *uio, int flag);
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int irframetwrite(struct tty *tp, struct uio *uio, int flag);
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int irframetpoll(struct tty *tp, int events, struct proc *p);
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#endif
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struct linesw termios_disc =
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{ "termios", TTYDISC, ttylopen, ttylclose, ttread, ttwrite,
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ttynullioctl, ttyinput, ttstart, ttymodem, ttpoll }; /* 0- termios */
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struct linesw defunct_disc =
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{ "defunct", 1, ttynodisc, ttyerrclose, ttyerrio, ttyerrio,
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ttynullioctl, ttyerrinput, ttyerrstart, nullmodem, ttyerrpoll }; /* 1- defunct */
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#if defined(COMPAT_43) || defined(COMPAT_FREEBSD)
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struct linesw ntty_disc =
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{ "ntty", 2, ttylopen, ttylclose, ttread, ttwrite, ttynullioctl,
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ttyinput, ttstart, ttymodem, ttpoll }; /* 2- old NTTYDISC */
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#endif
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#if NTB > 0
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struct linesw table_disc =
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{ "tablet", TABLDISC, tbopen, tbclose, tbread, ttyerrio, tbtioctl,
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tbinput, ttstart, nullmodem, ttyerrpoll }; /* 3- TABLDISC */
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#endif
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#if NSL > 0
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struct linesw slip_disc =
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{ "slip", SLIPDISC, slopen, slclose, ttyerrio, ttyerrio, sltioctl,
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slinput, slstart, nullmodem, ttyerrpoll }; /* 4- SLIPDISC */
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#endif
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#if NPPP > 0
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struct linesw ppp_disc =
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{ "ppp", PPPDISC, pppopen, pppclose, pppread, pppwrite, ppptioctl,
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pppinput, pppstart, ttymodem, ttpoll }; /* 5- PPPDISC */
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#endif
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#if NSTRIP > 0
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struct linesw strip_disc =
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{ "strip", STRIPDISC, stripopen, stripclose, ttyerrio, ttyerrio,
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striptioctl, stripinput, stripstart, nullmodem, ttyerrpoll };
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/* 6- STRIPDISC */
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#endif
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#if NIRFRAMETTY > 0
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struct linesw irframet_disc =
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{ "irframe", -1, irframetopen, irframetclose, ttyerrio,
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ttyerrio, irframetioctl, irframetinput, irframetstart,
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ttymodem, ttyerrpoll }; /* irframe */
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#endif
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/*
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* Registered line disciplines. Don't use this
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* it will go away.
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*/
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#define LSWITCHBRK 20
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struct linesw **linesw = NULL;
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int nlinesw = 0;
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int slinesw = 0;
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/*
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* Do nothing specific version of line
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* discipline specific ioctl command.
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*/
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/*ARGSUSED*/
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int
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ttynullioctl(tp, cmd, data, flags, p)
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struct tty *tp;
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u_long cmd;
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char *data;
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int flags;
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struct proc *p;
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{
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#ifdef lint
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tp = tp; data = data; flags = flags; p = p;
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#endif
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return (EPASSTHROUGH);
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}
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/*
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* Register a line discipline, optionally providing a
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* specific discipline number for compatibility, -1 allocates
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* a new one. Returns a discipline number, or -1 on
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* failure.
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*/
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int
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ttyldisc_add(disc, no)
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struct linesw *disc;
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int no;
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{
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/* You are not allowed to exceed TTLINEDNAMELEN */
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if (strlen(disc->l_name) >= TTLINEDNAMELEN)
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return (-1);
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/*
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* You are not allowed to specify a line switch
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* compatibility number greater than 10.
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*/
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if (no > 10)
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return (-1);
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if (linesw == NULL)
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panic("adding uninitialized linesw");
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#ifdef DEBUG
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/*
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* XXX: For the benefit of LKMs
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*/
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if (disc->l_poll == NULL)
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panic("line discipline must now provide l_poll() entry point");
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#endif
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if (no == -1) {
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/* Hunt for any slot */
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for (no = slinesw; no-- > 0;)
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if (linesw[no] == NULL)
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break;
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/* if no == -1 we should realloc linesw, but for now... */
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if (no == -1)
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return (-1);
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}
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/* Need a specific slot */
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if (linesw[no] != NULL)
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return (-1);
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linesw[no] = disc;
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disc->l_no = no;
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/* Define size of table */
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if (no >= nlinesw)
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nlinesw = no + 1;
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return (no);
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}
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/*
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* Remove a line discipline by its name. Returns the
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* discipline on success or NULL on failure.
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*/
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struct linesw *
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ttyldisc_remove(name)
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char *name;
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{
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struct linesw *disc;
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int i;
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if (linesw == NULL)
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panic("removing uninitialized linesw");
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for (i = 0; i < nlinesw; i++) {
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if (linesw[i] && (strcmp(name, linesw[i]->l_name) == 0)) {
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disc = linesw[i];
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linesw[i] = NULL;
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if (nlinesw == i + 1) {
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/* Need to fix up array sizing */
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while (i-- > 0 && linesw[i] == NULL)
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continue;
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nlinesw = i + 1;
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}
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return (disc);
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}
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}
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return (NULL);
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}
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/*
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* Look up a line discipline by its name.
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*/
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struct linesw *
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ttyldisc_lookup(name)
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char *name;
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{
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int i;
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for (i = 0; i < nlinesw; i++)
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if (linesw[i] && (strcmp(name, linesw[i]->l_name) == 0))
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return (linesw[i]);
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return (NULL);
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}
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#define TTYLDISCINIT(s, v) \
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do { \
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if (ttyldisc_add(&(s), (v)) != (v)) \
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panic("ttyldisc_init: " __STRING(s)); \
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} while (/*CONSTCOND*/ 0)
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/*
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* Register the basic line disciplines.
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*/
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void
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ttyldisc_init()
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{
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/* Only initialize once */
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if (linesw)
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return;
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slinesw = LSWITCHBRK;
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linesw = malloc(slinesw * sizeof(struct linesw *),
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M_TTYS, M_WAITOK);
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memset(linesw, 0, slinesw * sizeof(struct linesw *));
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TTYLDISCINIT(termios_disc, 0);
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/* Do we really need this one? */
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TTYLDISCINIT(defunct_disc, 1);
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/*
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* The following should really be moved to
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* initialization code for each module.
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*/
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#if defined(COMPAT_43) || defined(COMPAT_FREEBSD)
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TTYLDISCINIT(ntty_disc, 2);
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#endif
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#if NTB > 0
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TTYLDISCINIT(table_disc, 3);
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#endif
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#if NSL > 0
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TTYLDISCINIT(slip_disc, 4);
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#endif
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#if NPPP > 0
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TTYLDISCINIT(ppp_disc, 5);
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#endif
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#if NSTRIP > 0
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TTYLDISCINIT(strip_disc, 6);
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#endif
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#if NIRFRAMETTY > 0
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ttyldisc_add(&irframet_disc, -1);
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#endif
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}
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