fc0c0c5604
Completed function declarations. Added prototypes. Removed some useless includes.
446 lines
12 KiB
C
446 lines
12 KiB
C
static char _ittyid[] = "@(#)$Id: iitty.c,v 1.11 1995/07/31 21:28:42 bde Exp $";
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/*******************************************************************************
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* II - Version 0.1 $Revision: 1.11 $ $State: Exp $
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*
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* Copyright 1994 Dietmar Friede
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*******************************************************************************
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* Bug reports, patches, comments, suggestions should be sent to:
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*
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* jkr@saarlink.de or jkrause@guug.de
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*
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*******************************************************************************
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* $Log: iitty.c,v $
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* Revision 1.11 1995/07/31 21:28:42 bde
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* Use tsleep() instead of ttysleep() to wait for carrier since a generation
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* change isn't an error.
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*
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* Revision 1.10 1995/07/31 21:01:03 bde
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* Obtained from: partly from ancient patches of mine via 1.1.5
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*
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* Introduce TS_CONNECTED and TS_ZOMBIE states. TS_CONNECTED is set
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* while a connection is established. It is set while (TS_CARR_ON or
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* CLOCAL is set) and TS_ZOMBIE is clear. TS_ZOMBIE is set for on to
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* off transitions of TS_CARR_ON that occur when CLOCAL is clear and
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* is cleared for off to on transitions of CLOCAL. I/o can only occur
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* while TS_CONNECTED is set. TS_ZOMBIE prevents further i/o.
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*
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* Split the input-event sleep address TSA_CARR_ON(tp) into TSA_CARR_ON(tp)
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* and TSA_HUP_OR_INPUT(tp). The former address is now used only for
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* off to on carrier transitions and equivalent CLOCAL transitions.
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* The latter is used for all input events, all carrier transitions
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* and certain CLOCAL transitions. There are some harmless extra
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* wakeups for rare connection- related events. Previously there were
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* too many extra wakeups for non-rare input events.
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*
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* Drivers now call l_modem() instead of setting TS_CARR_ON directly
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* to handle even the initial off to on transition of carrier. They
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* should always have done this. l_modem() now handles TS_CONNECTED
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* and TS_ZOMBIE as well as TS_CARR_ON.
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*
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* gnu/isdn/iitty.c:
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* Set TS_CONNECTED for first open ourself to go with bogusly setting
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* CLOCAL.
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*
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* i386/isa/syscons.c, i386/isa/pcvt/pcvt_drv.c:
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* We fake carrier, so don't also fake CLOCAL.
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*
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* kern/tty.c:
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* Testing TS_CONNECTED instead of TS_CARR_ON fixes TIOCCONS forgetting to
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* test CLOCAL. TS_ISOPEN was tested instead, but that broke when we disabled
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* the clearing of TS_ISOPEN for certain transitions of CLOCAL.
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*
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* Testing TS_CONNECTED fixes ttyselect() returning false success for output
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* to devices in state !TS_CARR_ON && !CLOCAL.
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*
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* Optimize the other selwakeup() call (this is not related to the other
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* changes).
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*
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* kern/tty_pty.c:
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* ptcopen() can be declared in traditional C now that dev_t isn't short.
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*
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* Revision 1.9 1995/07/22 16:44:26 bde
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* Obtained from: partly from ancient patches of mine via 1.1.5
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*
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* Give names to the magic tty i/o sleep addresses and use them. This makes
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* it easier to remember what the addresses are for and to keep them unique.
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*
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* Revision 1.8 1995/07/22 01:29:28 bde
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* Move the inline code for waking up writers to a new function
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* ttwwakeup(). The conditions for doing the wakeup will soon become
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* more complicated and I don't want them duplicated in all drivers.
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*
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* It's probably not worth making ttwwakeup() a macro or an inline
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* function. The cost of the function call is relatively small when
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* there is a process to wake up. There is usually a process to wake
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* up for large writes and the system call overhead dwarfs the function
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* call overhead for small writes.
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*
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* Revision 1.7 1995/07/21 20:52:21 bde
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* Obtained from: partly from ancient patches by ache and me via 1.1.5
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*
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* Nuke `symbolic sleep message strings'. Use unique literal messages so that
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* `ps l' shows unambiguously where processes are sleeping.
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*
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* Revision 1.6 1995/07/21 16:30:37 bde
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* Obtained from: partly from an ancient patch of mine via 1.1.5
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*
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* Temporarily nuke TS_WOPEN. It was only used for the obscure MDMBUF
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* flow control option in the kernel and for informational purposes
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* in `pstat -t'. The latter worked properly only for ptys. In
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* general there may be multiple processes sleeping in open() and
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* multiple processes that successfully opened the tty by opening it
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* in O_NONBLOCK mode or during a window when CLOCAL was set. tty.c
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* doesn't have enough information to maintain the flag but always
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* cleared it in ttyopen().
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*
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* TS_WOPEN should be restored someday just so that `pstat -t' can
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* display it (MDMBUF is already fixed). Fixing it requires counting
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* of processes sleeping in open() in too many serial drivers.
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*
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* Revision 1.5 1995/03/28 07:54:43 bde
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* Add and move declarations to fix all of the warnings from `gcc -Wimplicit'
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* (except in netccitt, netiso and netns) that I didn't notice when I fixed
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* "all" such warnings before.
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*
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* Revision 1.4 1995/02/28 00:20:30 pst
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* Incorporate bde's code-review comments.
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*
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* (a) bring back ttselect, now that we have xxxdevtotty() it isn't dangerous.
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* (b) remove all of the wrappers that have been replaced by ttselect
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* (c) fix formatting in syscons.c and definition in syscons.h
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* (d) add cxdevtotty
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*
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* NOT DONE:
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* (e) make pcvt work... it was already broken...when someone fixes pcvt to
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* link properly, just rename get_pccons to xxxdevtotty and we're done
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*
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* Revision 1.3 1995/02/25 20:08:52 pst
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* (a) remove the pointer to each driver's tty structure array from cdevsw
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* (b) add a function callback vector to tty drivers that will return a pointer
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* to a valid tty structure based upon a dev_t
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* (c) make syscons structures the same size whether or not APM is enabled so
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* utilities don't crash if NAPM changes (and make the damn kernel compile!)
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* (d) rewrite /dev/snp ioctl interface so that it is device driver and i386
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* independant
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*
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* Revision 1.2 1995/02/15 06:28:28 jkh
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* Fix up include paths, nuke some warnings.
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*
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* Revision 1.1 1995/02/14 15:00:32 jkh
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* An ISDN driver that supports the EDSS1 and the 1TR6 ISDN interfaces.
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* EDSS1 is the "Euro-ISDN", 1TR6 is the soon obsolete german ISDN Interface.
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* Obtained from: Dietmar Friede <dfriede@drnhh.neuhaus.de> and
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* Juergen Krause <jkr@saarlink.de>
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*
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* This is only one part - the rest to follow in a couple of hours.
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* This part is a benign import, since it doesn't affect anything else.
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*
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*
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******************************************************************************/
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#include "ity.h"
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#if NITY > 0
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#include "param.h"
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#include "systm.h"
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#include "conf.h"
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#include "ioctl.h"
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#include "select.h"
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#include "tty.h"
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#include "proc.h"
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#include "file.h"
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#include "uio.h"
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#include "kernel.h"
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#include "syslog.h"
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#include "types.h"
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#include "gnu/isdn/isdn_ioctl.h"
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extern int ityparam __P((struct tty *tp, struct termios *t));
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extern void itystart __P((struct tty *tp));
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int nity = NITY;
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int itydefaultrate = 64000;
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short ity_addr[NITY];
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struct tty ity_tty[NITY];
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static int applnr[NITY];
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static int next_if= 0;
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#define UNIT(x) (minor(x)&0x3f)
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#define OUTBOUND(x) ((minor(x)&0x80)==0x80)
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int
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ityattach(int ap)
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{
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if(next_if >= NITY)
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return(-1);
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applnr[next_if]= ap;
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return(next_if++);
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}
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/* ARGSUSED */
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int
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ityopen(dev_t dev, int flag, int mode, struct proc * p)
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{
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register struct tty *tp;
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register int unit;
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int error = 0;
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unit = UNIT(dev);
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if (unit >= next_if)
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return (ENXIO);
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tp = &ity_tty[unit];
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tp->t_oproc = itystart;
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tp->t_param = ityparam;
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tp->t_dev = dev;
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if ((tp->t_state & TS_ISOPEN) == 0)
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{
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ttychars(tp);
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if (tp->t_ispeed == 0)
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{
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tp->t_iflag = TTYDEF_IFLAG;
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tp->t_oflag = TTYDEF_OFLAG;
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tp->t_cflag = TTYDEF_CFLAG;
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tp->t_lflag = TTYDEF_LFLAG;
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tp->t_ispeed = tp->t_ospeed = itydefaultrate;
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}
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ityparam(tp, &tp->t_termios);
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ttsetwater(tp);
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} else if (tp->t_state & TS_XCLUDE && p->p_ucred->cr_uid != 0)
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return (EBUSY);
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(void) spltty();
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if (OUTBOUND(dev)) {
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/*
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* XXX should call l_modem() here and not meddle with CLOCAL,
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* but itystart() wants TS_CARR_ON to give the true carrier.
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*/
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tp->t_cflag |= CLOCAL;
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tp->t_state |= TS_CONNECTED;
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}
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while ((flag & O_NONBLOCK) == 0 && (tp->t_cflag & CLOCAL) == 0 &&
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(tp->t_state & TS_CARR_ON) == 0)
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{
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error = tsleep(TSA_CARR_ON(tp), TTIPRI | PCATCH, "iidcd", 0);
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if (error)
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break;
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}
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(void) spl0();
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if (error == 0)
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error = (*linesw[tp->t_line].l_open) (dev, tp);
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return (error);
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}
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/* ARGSUSED */
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int
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ityclose(dev, flag, mode, p)
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dev_t dev;
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int flag, mode;
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struct proc *p;
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{
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register struct tty *tp;
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register ity;
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register int unit;
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unit = UNIT(dev);
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ity = ity_addr[unit];
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if(tp = &ity_tty[unit])
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(*linesw[tp->t_line].l_close) (tp, flag);
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ttyclose(tp);
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isdn_disconnect(applnr[unit],0);
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return (0);
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}
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int
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ityread(dev, uio, flag)
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dev_t dev;
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struct uio *uio;
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int flag;
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{
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register struct tty *tp = &ity_tty[UNIT(dev)];
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return ((*linesw[tp->t_line].l_read) (tp, uio, flag));
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}
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int
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itywrite(dev, uio, flag)
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dev_t dev;
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struct uio *uio;
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int flag;
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{
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int unit = UNIT(dev);
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register struct tty *tp = &ity_tty[unit];
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return ((*linesw[tp->t_line].l_write) (tp, uio, flag));
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}
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int
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ity_input(int no, int len, char *buf, int dir)
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{
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register struct tty *tp = &ity_tty[no];
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int i;
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if (tp->t_state & TS_ISOPEN)
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for(i= 0; i<len; i++)
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(*linesw[tp->t_line].l_rint)(buf[i], tp);
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else len= 0;
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return(len);
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}
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void
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itystart(struct tty *tp)
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{
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int s, unit;
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unit = UNIT(tp->t_dev);
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s = splhigh();
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if (tp->t_state & (TS_TIMEOUT | TS_TTSTOP))
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{
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splx(s);
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return;
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}
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ttwwakeup(tp);
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if (tp->t_outq.c_cc)
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{
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if(OUTBOUND(tp->t_dev) && (tp->t_cflag & CLOCAL) &&
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((tp->t_state & TS_CARR_ON) == 0))
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isdn_msg(applnr[unit]);
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else isdn_output(applnr[unit]);
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tp->t_state |= TS_BUSY;
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}
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splx(s);
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}
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int
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ity_out(int no, char *buf, int len)
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{
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struct tty *tp = &ity_tty[no];
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int i;
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if(tp == NULL)
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return(0);
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if(tp->t_outq.c_cc)
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{
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for (i = 0; i < len && tp->t_outq.c_cc; ++i)
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buf[i]= getc(&tp->t_outq);
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return(i);
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}
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tp->t_state &=~ (TS_BUSY|TS_FLUSH);
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if (tp->t_line)
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(*linesw[tp->t_line].l_start)(tp);
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else
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itystart(tp);
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return(0);
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}
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void
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ity_connect(int no)
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{
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struct tty *tp = &ity_tty[no];
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if(tp == NULL)
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return;
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if(OUTBOUND(tp->t_dev)) tp->t_cflag &= ~CLOCAL;
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(*linesw[tp->t_line].l_modem) (tp, 1);
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tp->t_state &=~ (TS_BUSY|TS_FLUSH);
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if (tp->t_line)
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(*linesw[tp->t_line].l_start)(tp);
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else
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itystart(tp);
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}
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void
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ity_disconnect(int no)
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{
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struct tty *tp = &ity_tty[no];
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if(tp) (*linesw[tp->t_line].l_modem) (tp, 0);
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}
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int
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ityioctl(dev, cmd, data, flag,p)
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dev_t dev;
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int cmd;
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caddr_t data;
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int flag;
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struct proc *p;
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{
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register struct tty *tp;
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register int unit = UNIT(dev);
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register int error;
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tp = &ity_tty[unit];
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error = (*linesw[tp->t_line].l_ioctl) (tp, cmd, data, flag,p);
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if (error >= 0)
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return (error);
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error = ttioctl(tp, cmd, data, flag);
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if (error >= 0)
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return (error);
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switch (cmd)
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{
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default:
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return (ENOTTY);
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}
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return (0);
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}
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int
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ityparam(tp, t)
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register struct tty *tp;
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register struct termios *t;
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{
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register ity;
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register int cfcr, cflag = t->c_cflag;
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int unit = UNIT(tp->t_dev);
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int ospeed = t->c_ospeed;
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/* check requested parameters */
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if (ospeed < 0 || (t->c_ispeed && t->c_ispeed != t->c_ospeed))
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return (EINVAL);
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/* and copy to tty */
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tp->t_ispeed = t->c_ispeed;
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tp->t_ospeed = t->c_ospeed;
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tp->t_cflag = cflag;
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if (ospeed == 0)
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{
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isdn_disconnect(applnr[unit],0);
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return (0);
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}
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return (0);
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}
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/*
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* Stop output on a line.
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*/
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/* ARGSUSED */
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void
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itystop(struct tty *tp, int flag)
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{
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register int s;
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s = splhigh();
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if (tp->t_state & TS_BUSY)
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{
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if ((tp->t_state & TS_TTSTOP) == 0)
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tp->t_state |= TS_FLUSH;
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}
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splx(s);
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}
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struct tty *
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itydevtotty(dev_t dev)
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{
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register int unit = UNIT(dev);
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if (unit >= next_if)
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return (NULL);
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return (&ity_tty[unit]);
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}
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#endif
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