406 lines
10 KiB
C
406 lines
10 KiB
C
/* $NetBSD: tty_tb.c,v 1.31 2005/02/26 21:34:55 perry Exp $ */
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/*-
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* Copyright (c) 1982, 1986, 1991, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)tty_tb.c 8.2 (Berkeley) 1/9/95
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: tty_tb.c,v 1.31 2005/02/26 21:34:55 perry Exp $");
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#include "tb.h"
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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/systm.h>
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#include <sys/conf.h>
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#include <sys/ioctl.h>
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#include <sys/ioctl_compat.h>
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#include <sys/tty.h>
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#include <sys/proc.h>
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union tbpos {
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struct hitpos hitpos;
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struct gtcopos gtcopos;
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struct polpos polpos;
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};
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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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/* decoding routine */
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void (*tbc_decode)(const struct tbconf *, char *, union tbpos *);
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u_char *tbc_run; /* enter run mode sequence */
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u_char *tbc_point; /* enter point mode sequence */
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u_char *tbc_stop; /* stop sequence */
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u_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 void gtcodecode(const struct tbconf *, char *, union tbpos *);
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static void tbolddecode(const struct tbconf *, char *, union tbpos *);
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static void tblresdecode(const struct tbconf *, char *, union tbpos *);
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static void tbhresdecode(const struct tbconf *, char *, union tbpos *);
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static void poldecode(const struct tbconf *, char *, union tbpos *);
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static const struct tbconf tbconf[TBTYPE] = {
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{ 0 },
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{ 5, sizeof(struct hitpos), 0200, tbolddecode, "6", "4" },
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{ 5, sizeof(struct hitpos), 0200, tbolddecode, "\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 hitpos), 0100, tblresdecode, "\1CN", "\1PT", "\2", "\4",
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TBF_INPROX },
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{ 6, sizeof(struct hitpos), 0200, tbhresdecode, "\1CN", "\1PT", "\2", "\4",
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TBF_INPROX },
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{ 5, sizeof(struct hitpos), 0100, tblresdecode, "\1CL\33", "\1PT\33", 0, 0},
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{ 6, sizeof(struct hitpos), 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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int tbinbuf;
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char *tbcp;
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union tbpos tbpos;
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} tb[NTB];
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int tbopen(dev_t, struct tty *);
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void tbclose(struct tty *);
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int tbread(struct tty *, struct uio *);
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void tbinput(int, struct tty *);
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int tbtioctl(struct tty *, u_long, caddr_t, int, struct proc *);
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void tbattach(int);
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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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int
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tbopen(dev, tp)
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dev_t dev;
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struct tty *tp;
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{
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struct tb *tbp;
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if (tp->t_linesw->l_no == TABLDISC)
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return (ENODEV);
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ttywflush(tp);
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for (tbp = tb; tbp < &tb[NTB]; tbp++)
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if (tbp->tbflags == 0)
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break;
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if (tbp >= &tb[NTB])
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return (EBUSY);
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tbp->tbflags = TBTIGER|TBPOINT; /* default */
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tbp->tbcp = tbp->cbuf;
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tbp->tbinbuf = 0;
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memset((caddr_t)&tbp->tbpos, 0, sizeof(tbp->tbpos));
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tp->t_sc = (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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void
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tbclose(tp)
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struct tty *tp;
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{
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int modebits = TBPOINT|TBSTOP;
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tbtioctl(tp, BIOSMODE, (caddr_t) &modebits, 0, curproc);
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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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int
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tbread(tp, uio)
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struct tty *tp;
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struct uio *uio;
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{
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struct tb *tbp = (struct tb *)tp->t_sc;
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const 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((caddr_t) &tbp->tbpos, tc->tbc_uiosize, uio);
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if (tc->tbc_flags&TBF_POL)
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tbp->tbpos.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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void
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tbinput(c, tp)
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int c;
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struct tty *tp;
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{
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struct tb *tbp = (struct tb *)tp->t_sc;
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const 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 || tbp->tbinbuf == tc->tbc_recsize) {
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tbp->tbcp = tbp->cbuf;
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tbp->tbinbuf = 0;
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}
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*tbp->tbcp++ = 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 (++tbp->tbinbuf == tc->tbc_recsize)
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(*tc->tbc_decode)(tc, tbp->cbuf, &tbp->tbpos);
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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 void
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gtcodecode(tc, cp, u)
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const struct tbconf *tc;
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char *cp;
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union tbpos *u;
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{
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struct gtcopos *pos = &u->gtcopos;
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pos->pressure = *cp >> 2;
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pos->status = (pos->pressure > 16) | TBINPROX; /* half way down */
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pos->xpos = (*cp++ & 03) << 14;
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pos->xpos |= *cp++ << 7;
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pos->xpos |= *cp++;
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pos->ypos = (*cp++ & 03) << 14;
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pos->ypos |= *cp++ << 7;
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pos->ypos |= *cp++;
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pos->xtilt = *cp++;
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pos->ytilt = *cp++;
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pos->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 void
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tbolddecode(tc, cp, u)
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const struct tbconf *tc;
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char *cp;
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union tbpos *u;
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{
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struct hitpos *pos = &u->hitpos;
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char byte;
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byte = *cp++;
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pos->status = (byte&0100) ? TBINPROX : 0;
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byte &= ~0100;
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if (byte > 036)
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pos->status |= 1 << ((byte-040)/2);
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pos->xpos = *cp++ << 7;
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pos->xpos |= *cp++;
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if (pos->xpos < 256) /* tablet wraps around at 256 */
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pos->status &= ~TBINPROX; /* make it out of proximity */
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pos->ypos = *cp++ << 7;
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pos->ypos |= *cp++;
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pos->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 void
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tblresdecode(tc, cp, u)
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const struct tbconf *tc;
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char *cp;
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union tbpos *u;
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{
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struct hitpos *pos = &u->hitpos;
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*cp &= ~0100; /* mask sync bit */
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pos->status = (*cp++ >> 2) | TBINPROX;
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if (tc->tbc_flags&TBF_INPROX && pos->status&020)
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pos->status &= ~(020|TBINPROX);
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pos->xpos = *cp++;
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pos->xpos |= *cp++ << 6;
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pos->ypos = *cp++;
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pos->ypos |= *cp++ << 6;
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pos->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 void
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tbhresdecode(tc, cp, u)
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const struct tbconf *tc;
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char *cp;
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union tbpos *u;
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{
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struct hitpos *pos = &u->hitpos;
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char byte;
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byte = *cp++;
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pos->xpos = (byte & 03) << 14;
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pos->xpos |= *cp++ << 7;
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pos->xpos |= *cp++;
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pos->ypos = *cp++ << 14;
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pos->ypos |= *cp++ << 7;
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pos->ypos |= *cp++;
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pos->status = (byte >> 2) | TBINPROX;
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if (tc->tbc_flags&TBF_INPROX && pos->status&020)
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pos->status &= ~(020|TBINPROX);
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pos->scount++;
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}
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/*
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* Polhemus decode.
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*/
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static void
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poldecode(tc, cp, u)
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const struct tbconf *tc;
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char *cp;
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union tbpos *u;
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{
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struct polpos *pos = &u->polpos;
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pos->p_x = cp[4] | cp[3]<<7 | (cp[9] & 0x03) << 14;
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pos->p_y = cp[6] | cp[5]<<7 | (cp[9] & 0x0c) << 12;
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pos->p_z = cp[8] | cp[7]<<7 | (cp[9] & 0x30) << 10;
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pos->p_azi = cp[11] | cp[10]<<7 | (cp[16] & 0x03) << 14;
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pos->p_pit = cp[13] | cp[12]<<7 | (cp[16] & 0x0c) << 12;
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pos->p_rol = cp[15] | cp[14]<<7 | (cp[16] & 0x30) << 10;
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pos->p_stat = cp[1] | cp[0]<<7;
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if (cp[2] != ' ')
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pos->p_key = cp[2];
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}
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/*ARGSUSED*/
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int
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tbtioctl(tp, cmd, data, flag, p)
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struct tty *tp;
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u_long 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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struct tb *tbp = (struct tb *)tp->t_sc;
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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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const struct tbconf *tc;
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u_char *c;
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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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for (c = tc->tbc_stop; *c != '\0'; c++)
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ttyoutput(*c, tp);
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} else if (tc->tbc_start)
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for (c = tc->tbc_start; *c != '\0'; c++)
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ttyoutput(*c, tp);
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if (tbp->tbflags & TBPOINT) {
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if (tc->tbc_point)
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for (c = tc->tbc_point; *c != '\0'; c++)
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ttyoutput(*c, tp);
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} else if (tc->tbc_run)
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for (c = tc->tbc_run; *c != '\0'; c++)
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ttyoutput(*c, 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 TIOCSLINED:
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case TIOCGLINED:
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case TIOCGETA:
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case TIOCGETP:
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case TIOCGETC:
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return (EPASSTHROUGH); /* pass thru... */
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default:
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/* specifically disallow any other ioctl commands */
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return (ENOTTY);
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}
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return (0);
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}
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void
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tbattach(dummy)
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int dummy;
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{
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/* stub to handle side effect of new config */
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}
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