1130b656e5
This will make a number of things easier in the future, as well as (finally!) avoiding the Id-smashing problem which has plagued developers for so long. Boy, I'm glad we're not using sup anymore. This update would have been insane otherwise.
368 lines
9.5 KiB
C
368 lines
9.5 KiB
C
/*-
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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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*
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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. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. 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_tb.c 8.1 (Berkeley) 6/10/93
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* $FreeBSD$
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*/
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#include "tb.h"
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#if NTB > 0
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/*
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* Line discipline for RS232 tablets;
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* supplies binary coordinate data.
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*/
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#include <sys/param.h>
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#include <sys/tablet.h>
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#include <sys/tty.h>
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/*
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* Tablet configuration table.
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*/
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struct tbconf {
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short tbc_recsize; /* input record size in bytes */
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short tbc_uiosize; /* size of data record returned user */
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int tbc_sync; /* mask for finding sync byte/bit */
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int (*tbc_decode)();/* decoding routine */
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char *tbc_run; /* enter run mode sequence */
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char *tbc_point; /* enter point mode sequence */
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char *tbc_stop; /* stop sequence */
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char *tbc_start; /* start/restart sequence */
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int tbc_flags;
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#define TBF_POL 0x1 /* polhemus hack */
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#define TBF_INPROX 0x2 /* tablet has proximity info */
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};
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static int tbdecode(), gtcodecode(), poldecode();
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static int tblresdecode(), tbhresdecode();
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struct tbconf tbconf[TBTYPE] = {
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{ 0 },
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{ 5, sizeof (struct tbpos), 0200, tbdecode, "6", "4" },
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{ 5, sizeof (struct tbpos), 0200, tbdecode, "\1CN", "\1RT", "\2", "\4" },
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{ 8, sizeof (struct gtcopos), 0200, gtcodecode },
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{17, sizeof (struct polpos), 0200, poldecode, 0, 0, "\21", "\5\22\2\23",
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TBF_POL },
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{ 5, sizeof (struct tbpos), 0100, tblresdecode, "\1CN", "\1PT", "\2", "\4",
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TBF_INPROX },
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{ 6, sizeof (struct tbpos), 0200, tbhresdecode, "\1CN", "\1PT", "\2", "\4",
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TBF_INPROX },
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{ 5, sizeof (struct tbpos), 0100, tblresdecode, "\1CL\33", "\1PT\33", 0, 0},
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{ 6, sizeof (struct tbpos), 0200, tbhresdecode, "\1CL\33", "\1PT\33", 0, 0},
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};
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/*
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* Tablet state
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*/
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struct tb {
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int tbflags; /* mode & type bits */
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#define TBMAXREC 17 /* max input record size */
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char cbuf[TBMAXREC]; /* input buffer */
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union {
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struct tbpos tbpos;
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struct gtcopos gtcopos;
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struct polpos polpos;
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} rets; /* processed state */
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#define NTBS 16
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} tb[NTBS];
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/*
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* Open as tablet discipline; called on discipline change.
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*/
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/*ARGSUSED*/
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tbopen(dev, tp)
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dev_t dev;
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register struct tty *tp;
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{
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register struct tb *tbp;
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if (tp->t_line == TABLDISC)
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return (ENODEV);
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ttywflush(tp);
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for (tbp = tb; tbp < &tb[NTBS]; tbp++)
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if (tbp->tbflags == 0)
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break;
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if (tbp >= &tb[NTBS])
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return (EBUSY);
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tbp->tbflags = TBTIGER|TBPOINT; /* default */
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tp->t_cp = tbp->cbuf;
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tp->t_inbuf = 0;
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bzero((caddr_t)&tbp->rets, sizeof (tbp->rets));
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tp->T_LINEP = (caddr_t)tbp;
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tp->t_flags |= LITOUT;
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return (0);
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}
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/*
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* Line discipline change or last device close.
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*/
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tbclose(tp)
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register struct tty *tp;
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{
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register int s;
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int modebits = TBPOINT|TBSTOP;
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tbioctl(tp, BIOSMODE, &modebits, 0);
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s = spltty();
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((struct tb *)tp->T_LINEP)->tbflags = 0;
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tp->t_cp = 0;
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tp->t_inbuf = 0;
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tp->t_rawq.c_cc = 0; /* clear queues -- paranoid */
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tp->t_canq.c_cc = 0;
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tp->t_line = 0; /* paranoid: avoid races */
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splx(s);
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}
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/*
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* Read from a tablet line.
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* Characters have been buffered in a buffer and decoded.
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*/
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tbread(tp, uio)
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register struct tty *tp;
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struct uio *uio;
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{
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register struct tb *tbp = (struct tb *)tp->T_LINEP;
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register struct tbconf *tc = &tbconf[tbp->tbflags & TBTYPE];
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int ret;
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if ((tp->t_state&TS_CARR_ON) == 0)
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return (EIO);
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ret = uiomove(&tbp->rets, tc->tbc_uiosize, uio);
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if (tc->tbc_flags&TBF_POL)
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tbp->rets.polpos.p_key = ' ';
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return (ret);
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}
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/*
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* Low level character input routine.
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* Stuff the character in the buffer, and decode
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* if all the chars are there.
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*
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* This routine could be expanded in-line in the receiver
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* interrupt routine to make it run as fast as possible.
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*/
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tbinput(c, tp)
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register int c;
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register struct tty *tp;
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{
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register struct tb *tbp = (struct tb *)tp->T_LINEP;
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register struct tbconf *tc = &tbconf[tbp->tbflags & TBTYPE];
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if (tc->tbc_recsize == 0 || tc->tbc_decode == 0) /* paranoid? */
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return;
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/*
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* Locate sync bit/byte or reset input buffer.
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*/
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if (c&tc->tbc_sync || tp->t_inbuf == tc->tbc_recsize) {
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tp->t_cp = tbp->cbuf;
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tp->t_inbuf = 0;
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}
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*tp->t_cp++ = c&0177;
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/*
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* Call decode routine only if a full record has been collected.
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*/
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if (++tp->t_inbuf == tc->tbc_recsize)
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(*tc->tbc_decode)(tc, tbp->cbuf, &tbp->rets);
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}
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/*
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* Decode GTCO 8 byte format (high res, tilt, and pressure).
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*/
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static
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gtcodecode(tc, cp, tbpos)
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struct tbconf *tc;
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register char *cp;
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register struct gtcopos *tbpos;
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{
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tbpos->pressure = *cp >> 2;
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tbpos->status = (tbpos->pressure > 16) | TBINPROX; /* half way down */
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tbpos->xpos = (*cp++ & 03) << 14;
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tbpos->xpos |= *cp++ << 7;
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tbpos->xpos |= *cp++;
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tbpos->ypos = (*cp++ & 03) << 14;
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tbpos->ypos |= *cp++ << 7;
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tbpos->ypos |= *cp++;
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tbpos->xtilt = *cp++;
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tbpos->ytilt = *cp++;
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tbpos->scount++;
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}
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/*
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* Decode old Hitachi 5 byte format (low res).
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*/
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static
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tbdecode(tc, cp, tbpos)
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struct tbconf *tc;
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register char *cp;
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register struct tbpos *tbpos;
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{
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register char byte;
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byte = *cp++;
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tbpos->status = (byte&0100) ? TBINPROX : 0;
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byte &= ~0100;
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if (byte > 036)
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tbpos->status |= 1 << ((byte-040)/2);
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tbpos->xpos = *cp++ << 7;
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tbpos->xpos |= *cp++;
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if (tbpos->xpos < 256) /* tablet wraps around at 256 */
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tbpos->status &= ~TBINPROX; /* make it out of proximity */
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tbpos->ypos = *cp++ << 7;
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tbpos->ypos |= *cp++;
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tbpos->scount++;
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}
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/*
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* Decode new Hitach 5-byte format (low res).
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*/
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static
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tblresdecode(tc, cp, tbpos)
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struct tbconf *tc;
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register char *cp;
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register struct tbpos *tbpos;
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{
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*cp &= ~0100; /* mask sync bit */
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tbpos->status = (*cp++ >> 2) | TBINPROX;
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if (tc->tbc_flags&TBF_INPROX && tbpos->status&020)
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tbpos->status &= ~(020|TBINPROX);
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tbpos->xpos = *cp++;
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tbpos->xpos |= *cp++ << 6;
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tbpos->ypos = *cp++;
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tbpos->ypos |= *cp++ << 6;
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tbpos->scount++;
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}
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/*
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* Decode new Hitach 6-byte format (high res).
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*/
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static
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tbhresdecode(tc, cp, tbpos)
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struct tbconf *tc;
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register char *cp;
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register struct tbpos *tbpos;
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{
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char byte;
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byte = *cp++;
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tbpos->xpos = (byte & 03) << 14;
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tbpos->xpos |= *cp++ << 7;
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tbpos->xpos |= *cp++;
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tbpos->ypos = *cp++ << 14;
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tbpos->ypos |= *cp++ << 7;
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tbpos->ypos |= *cp++;
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tbpos->status = (byte >> 2) | TBINPROX;
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if (tc->tbc_flags&TBF_INPROX && tbpos->status&020)
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tbpos->status &= ~(020|TBINPROX);
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tbpos->scount++;
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}
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/*
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* Polhemus decode.
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*/
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static
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poldecode(tc, cp, polpos)
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struct tbconf *tc;
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register char *cp;
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register struct polpos *polpos;
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{
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polpos->p_x = cp[4] | cp[3]<<7 | (cp[9] & 0x03) << 14;
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polpos->p_y = cp[6] | cp[5]<<7 | (cp[9] & 0x0c) << 12;
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polpos->p_z = cp[8] | cp[7]<<7 | (cp[9] & 0x30) << 10;
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polpos->p_azi = cp[11] | cp[10]<<7 | (cp[16] & 0x03) << 14;
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polpos->p_pit = cp[13] | cp[12]<<7 | (cp[16] & 0x0c) << 12;
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polpos->p_rol = cp[15] | cp[14]<<7 | (cp[16] & 0x30) << 10;
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polpos->p_stat = cp[1] | cp[0]<<7;
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if (cp[2] != ' ')
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polpos->p_key = cp[2];
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}
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/*ARGSUSED*/
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tbioctl(tp, cmd, data, flag)
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struct tty *tp;
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caddr_t data;
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{
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register struct tb *tbp = (struct tb *)tp->T_LINEP;
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switch (cmd) {
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case BIOGMODE:
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*(int *)data = tbp->tbflags & TBMODE;
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break;
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case BIOSTYPE:
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if (tbconf[*(int *)data & TBTYPE].tbc_recsize == 0 ||
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tbconf[*(int *)data & TBTYPE].tbc_decode == 0)
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return (EINVAL);
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tbp->tbflags &= ~TBTYPE;
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tbp->tbflags |= *(int *)data & TBTYPE;
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/* fall thru... to set mode bits */
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case BIOSMODE: {
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register struct tbconf *tc;
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tbp->tbflags &= ~TBMODE;
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tbp->tbflags |= *(int *)data & TBMODE;
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tc = &tbconf[tbp->tbflags & TBTYPE];
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if (tbp->tbflags&TBSTOP) {
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if (tc->tbc_stop)
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ttyout(tc->tbc_stop, tp);
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} else if (tc->tbc_start)
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ttyout(tc->tbc_start, tp);
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if (tbp->tbflags&TBPOINT) {
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if (tc->tbc_point)
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ttyout(tc->tbc_point, tp);
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} else if (tc->tbc_run)
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ttyout(tc->tbc_run, tp);
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ttstart(tp);
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break;
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}
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case BIOGTYPE:
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*(int *)data = tbp->tbflags & TBTYPE;
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break;
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case TIOCSETD:
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case TIOCGETD:
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case TIOCGETP:
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case TIOCGETC:
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return (-1); /* pass thru... */
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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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#endif
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