548 lines
15 KiB
C
548 lines
15 KiB
C
static char _ittyid[] = "@(#)$Id: iitty.c,v 1.16 1995/12/08 11:12:56 julian Exp $";
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/*******************************************************************************
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* II - Version 0.1 $Revision: 1.16 $ $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 1.16 1995/12/08 11:12:56 julian
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* Pass 3 of the great devsw changes
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* most devsw referenced functions are now static, as they are
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* in the same file as their devsw structure. I've also added DEVFS
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* support for nearly every device in the system, however
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* many of the devices have 'incorrect' names under DEVFS
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* because I couldn't quickly work out the correct naming conventions.
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* (but devfs won't be coming on line for a month or so anyhow so that doesn't
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* matter)
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*
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* If you "OWN" a device which would normally have an entry in /dev
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* then search for the devfs_add_devsw() entries and munge to make them right..
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* check out similar devices to see what I might have done in them in you
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* can't see what's going on..
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* for a laugh compare conf.c conf.h defore and after... :)
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* I have not doen DEVFS entries for any DISKSLICE devices yet as that will be
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* a much more complicated job.. (pass 5 :)
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*
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* pass 4 will be to make the devsw tables of type (cdevsw * )
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* rather than (cdevsw)
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* seems to work here..
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* complaints to the usual places.. :)
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*
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* Revision 1.15 1995/12/05 20:33:47 bde
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* Fixed ity's d_stop entry. itystop() wasn't used. itystop() is inadequate
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* but probably harmless. It's hard to tell because apparently no one runs
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* ity.
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*
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* Fixed ity's d_reset entry. `nx' entries should never be used for existing
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* devices.
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*
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* conf.c:
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* Moved a prototype to a better place.
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*
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* Removed a stale #define.
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*
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* Revision 1.14 1995/11/29 14:39:12 julian
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* If you're going to mechanically replicate something in 50 files
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* it's best to not have a (compiles cleanly) typo in it! (sigh)
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*
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* Revision 1.13 1995/11/29 10:47:09 julian
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* OK, that's it..
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* That's EVERY SINGLE driver that has an entry in conf.c..
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* my next trick will be to define cdevsw[] and bdevsw[]
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* as empty arrays and remove all those DAMNED defines as well..
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*
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* Revision 1.12 1995/11/16 10:35:29 bde
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* Fixed the type of ity_input(). A trailing arg was missing.
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*
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* Completed function declarations.
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*
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* Added prototypes.
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*
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* Removed some useless includes.
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*
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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 <sys/param.h>
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#include <sys/systm.h>
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#include <sys/conf.h>
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#include <sys/ioctl.h>
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#include <sys/select.h>
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#include <sys/tty.h>
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#include <sys/proc.h>
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#include <sys/file.h>
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#include <sys/uio.h>
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#include <sys/kernel.h>
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#include <sys/syslog.h>
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#include <sys/types.h>
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#ifdef DEVFS
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#include <sys/devfsext.h>
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#endif /*DEVFS*/
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#include "gnu/isdn/isdn_ioctl.h"
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static d_open_t ityopen;
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static d_close_t ityclose;
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static d_read_t ityread;
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static d_write_t itywrite;
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static d_ioctl_t ityioctl;
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static d_stop_t itystop;
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static d_ttycv_t itydevtotty;
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#define CDEV_MAJOR 56
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static struct cdevsw ity_cdevsw =
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{ ityopen, ityclose, ityread, itywrite, /*56*/
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ityioctl, itystop, noreset, itydevtotty,/* ity */
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ttselect, nommap, NULL, "ity", NULL, -1 };
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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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#ifdef DEVFS
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void *devfs_token[NITY];
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void *devfs_token_out[NITY];
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#endif
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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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char name[32];
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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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#ifdef DEVFS
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sprintf(name,"ity%d",next_if);
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devfs_token[next_if] = devfs_add_devsw("/isdn",name,
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&ity_cdevsw,next_if, DV_CHR, 0, 0, 0600);
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sprintf(name,"Oity%d",next_if); /* XXX find out real name */
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devfs_token[next_if] = devfs_add_devsw("/isdn",name,
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&ity_cdevsw,(next_if | 0x80), DV_CHR, 0, 0, 0600);
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#endif
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return(next_if++);
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}
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/* ARGSUSED */
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static 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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static 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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static 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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static 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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static 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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}
|
|
|
|
int
|
|
ityparam(tp, t)
|
|
register struct tty *tp;
|
|
register struct termios *t;
|
|
{
|
|
register ity;
|
|
register int cfcr, cflag = t->c_cflag;
|
|
int unit = UNIT(tp->t_dev);
|
|
int ospeed = t->c_ospeed;
|
|
|
|
/* check requested parameters */
|
|
if (ospeed < 0 || (t->c_ispeed && t->c_ispeed != t->c_ospeed))
|
|
return (EINVAL);
|
|
/* and copy to tty */
|
|
tp->t_ispeed = t->c_ispeed;
|
|
tp->t_ospeed = t->c_ospeed;
|
|
tp->t_cflag = cflag;
|
|
|
|
if (ospeed == 0)
|
|
{
|
|
isdn_disconnect(applnr[unit],0);
|
|
return (0);
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Stop output on a line.
|
|
*/
|
|
/* ARGSUSED */
|
|
static void
|
|
itystop(struct tty *tp, int flag)
|
|
{
|
|
register int s;
|
|
|
|
s = splhigh();
|
|
if (tp->t_state & TS_BUSY)
|
|
{
|
|
if ((tp->t_state & TS_TTSTOP) == 0)
|
|
tp->t_state |= TS_FLUSH;
|
|
}
|
|
splx(s);
|
|
}
|
|
|
|
static struct tty *
|
|
itydevtotty(dev_t dev)
|
|
{
|
|
register int unit = UNIT(dev);
|
|
if (unit >= next_if)
|
|
return (NULL);
|
|
|
|
return (&ity_tty[unit]);
|
|
}
|
|
|
|
static ity_devsw_installed = 0;
|
|
|
|
static void
|
|
ity_drvinit(void *unused)
|
|
{
|
|
dev_t dev;
|
|
|
|
if( ! ity_devsw_installed ) {
|
|
dev = makedev(CDEV_MAJOR, 0);
|
|
cdevsw_add(&dev,&ity_cdevsw, NULL);
|
|
ity_devsw_installed = 1;
|
|
}
|
|
}
|
|
|
|
SYSINIT(itydev,SI_SUB_DRIVERS,SI_ORDER_MIDDLE+CDEV_MAJOR,ity_drvinit,NULL)
|
|
|
|
#endif
|