freebsd-dev/sys/kern/tty_tb.c
1997-02-22 09:48:43 +00:00

368 lines
9.5 KiB
C

/*-
* Copyright (c) 1982, 1986, 1991, 1993
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* @(#)tty_tb.c 8.1 (Berkeley) 6/10/93
* $Id$
*/
#include "tb.h"
#if NTB > 0
/*
* Line discipline for RS232 tablets;
* supplies binary coordinate data.
*/
#include <sys/param.h>
#include <sys/tablet.h>
#include <sys/tty.h>
/*
* Tablet configuration table.
*/
struct tbconf {
short tbc_recsize; /* input record size in bytes */
short tbc_uiosize; /* size of data record returned user */
int tbc_sync; /* mask for finding sync byte/bit */
int (*tbc_decode)();/* decoding routine */
char *tbc_run; /* enter run mode sequence */
char *tbc_point; /* enter point mode sequence */
char *tbc_stop; /* stop sequence */
char *tbc_start; /* start/restart sequence */
int tbc_flags;
#define TBF_POL 0x1 /* polhemus hack */
#define TBF_INPROX 0x2 /* tablet has proximity info */
};
static int tbdecode(), gtcodecode(), poldecode();
static int tblresdecode(), tbhresdecode();
struct tbconf tbconf[TBTYPE] = {
{ 0 },
{ 5, sizeof (struct tbpos), 0200, tbdecode, "6", "4" },
{ 5, sizeof (struct tbpos), 0200, tbdecode, "\1CN", "\1RT", "\2", "\4" },
{ 8, sizeof (struct gtcopos), 0200, gtcodecode },
{17, sizeof (struct polpos), 0200, poldecode, 0, 0, "\21", "\5\22\2\23",
TBF_POL },
{ 5, sizeof (struct tbpos), 0100, tblresdecode, "\1CN", "\1PT", "\2", "\4",
TBF_INPROX },
{ 6, sizeof (struct tbpos), 0200, tbhresdecode, "\1CN", "\1PT", "\2", "\4",
TBF_INPROX },
{ 5, sizeof (struct tbpos), 0100, tblresdecode, "\1CL\33", "\1PT\33", 0, 0},
{ 6, sizeof (struct tbpos), 0200, tbhresdecode, "\1CL\33", "\1PT\33", 0, 0},
};
/*
* Tablet state
*/
struct tb {
int tbflags; /* mode & type bits */
#define TBMAXREC 17 /* max input record size */
char cbuf[TBMAXREC]; /* input buffer */
union {
struct tbpos tbpos;
struct gtcopos gtcopos;
struct polpos polpos;
} rets; /* processed state */
#define NTBS 16
} tb[NTBS];
/*
* Open as tablet discipline; called on discipline change.
*/
/*ARGSUSED*/
tbopen(dev, tp)
dev_t dev;
register struct tty *tp;
{
register struct tb *tbp;
if (tp->t_line == TABLDISC)
return (ENODEV);
ttywflush(tp);
for (tbp = tb; tbp < &tb[NTBS]; tbp++)
if (tbp->tbflags == 0)
break;
if (tbp >= &tb[NTBS])
return (EBUSY);
tbp->tbflags = TBTIGER|TBPOINT; /* default */
tp->t_cp = tbp->cbuf;
tp->t_inbuf = 0;
bzero((caddr_t)&tbp->rets, sizeof (tbp->rets));
tp->T_LINEP = (caddr_t)tbp;
tp->t_flags |= LITOUT;
return (0);
}
/*
* Line discipline change or last device close.
*/
tbclose(tp)
register struct tty *tp;
{
register int s;
int modebits = TBPOINT|TBSTOP;
tbioctl(tp, BIOSMODE, &modebits, 0);
s = spltty();
((struct tb *)tp->T_LINEP)->tbflags = 0;
tp->t_cp = 0;
tp->t_inbuf = 0;
tp->t_rawq.c_cc = 0; /* clear queues -- paranoid */
tp->t_canq.c_cc = 0;
tp->t_line = 0; /* paranoid: avoid races */
splx(s);
}
/*
* Read from a tablet line.
* Characters have been buffered in a buffer and decoded.
*/
tbread(tp, uio)
register struct tty *tp;
struct uio *uio;
{
register struct tb *tbp = (struct tb *)tp->T_LINEP;
register struct tbconf *tc = &tbconf[tbp->tbflags & TBTYPE];
int ret;
if ((tp->t_state&TS_CARR_ON) == 0)
return (EIO);
ret = uiomove(&tbp->rets, tc->tbc_uiosize, uio);
if (tc->tbc_flags&TBF_POL)
tbp->rets.polpos.p_key = ' ';
return (ret);
}
/*
* Low level character input routine.
* Stuff the character in the buffer, and decode
* if all the chars are there.
*
* This routine could be expanded in-line in the receiver
* interrupt routine to make it run as fast as possible.
*/
tbinput(c, tp)
register int c;
register struct tty *tp;
{
register struct tb *tbp = (struct tb *)tp->T_LINEP;
register struct tbconf *tc = &tbconf[tbp->tbflags & TBTYPE];
if (tc->tbc_recsize == 0 || tc->tbc_decode == 0) /* paranoid? */
return;
/*
* Locate sync bit/byte or reset input buffer.
*/
if (c&tc->tbc_sync || tp->t_inbuf == tc->tbc_recsize) {
tp->t_cp = tbp->cbuf;
tp->t_inbuf = 0;
}
*tp->t_cp++ = c&0177;
/*
* Call decode routine only if a full record has been collected.
*/
if (++tp->t_inbuf == tc->tbc_recsize)
(*tc->tbc_decode)(tc, tbp->cbuf, &tbp->rets);
}
/*
* Decode GTCO 8 byte format (high res, tilt, and pressure).
*/
static
gtcodecode(tc, cp, tbpos)
struct tbconf *tc;
register char *cp;
register struct gtcopos *tbpos;
{
tbpos->pressure = *cp >> 2;
tbpos->status = (tbpos->pressure > 16) | TBINPROX; /* half way down */
tbpos->xpos = (*cp++ & 03) << 14;
tbpos->xpos |= *cp++ << 7;
tbpos->xpos |= *cp++;
tbpos->ypos = (*cp++ & 03) << 14;
tbpos->ypos |= *cp++ << 7;
tbpos->ypos |= *cp++;
tbpos->xtilt = *cp++;
tbpos->ytilt = *cp++;
tbpos->scount++;
}
/*
* Decode old Hitachi 5 byte format (low res).
*/
static
tbdecode(tc, cp, tbpos)
struct tbconf *tc;
register char *cp;
register struct tbpos *tbpos;
{
register char byte;
byte = *cp++;
tbpos->status = (byte&0100) ? TBINPROX : 0;
byte &= ~0100;
if (byte > 036)
tbpos->status |= 1 << ((byte-040)/2);
tbpos->xpos = *cp++ << 7;
tbpos->xpos |= *cp++;
if (tbpos->xpos < 256) /* tablet wraps around at 256 */
tbpos->status &= ~TBINPROX; /* make it out of proximity */
tbpos->ypos = *cp++ << 7;
tbpos->ypos |= *cp++;
tbpos->scount++;
}
/*
* Decode new Hitach 5-byte format (low res).
*/
static
tblresdecode(tc, cp, tbpos)
struct tbconf *tc;
register char *cp;
register struct tbpos *tbpos;
{
*cp &= ~0100; /* mask sync bit */
tbpos->status = (*cp++ >> 2) | TBINPROX;
if (tc->tbc_flags&TBF_INPROX && tbpos->status&020)
tbpos->status &= ~(020|TBINPROX);
tbpos->xpos = *cp++;
tbpos->xpos |= *cp++ << 6;
tbpos->ypos = *cp++;
tbpos->ypos |= *cp++ << 6;
tbpos->scount++;
}
/*
* Decode new Hitach 6-byte format (high res).
*/
static
tbhresdecode(tc, cp, tbpos)
struct tbconf *tc;
register char *cp;
register struct tbpos *tbpos;
{
char byte;
byte = *cp++;
tbpos->xpos = (byte & 03) << 14;
tbpos->xpos |= *cp++ << 7;
tbpos->xpos |= *cp++;
tbpos->ypos = *cp++ << 14;
tbpos->ypos |= *cp++ << 7;
tbpos->ypos |= *cp++;
tbpos->status = (byte >> 2) | TBINPROX;
if (tc->tbc_flags&TBF_INPROX && tbpos->status&020)
tbpos->status &= ~(020|TBINPROX);
tbpos->scount++;
}
/*
* Polhemus decode.
*/
static
poldecode(tc, cp, polpos)
struct tbconf *tc;
register char *cp;
register struct polpos *polpos;
{
polpos->p_x = cp[4] | cp[3]<<7 | (cp[9] & 0x03) << 14;
polpos->p_y = cp[6] | cp[5]<<7 | (cp[9] & 0x0c) << 12;
polpos->p_z = cp[8] | cp[7]<<7 | (cp[9] & 0x30) << 10;
polpos->p_azi = cp[11] | cp[10]<<7 | (cp[16] & 0x03) << 14;
polpos->p_pit = cp[13] | cp[12]<<7 | (cp[16] & 0x0c) << 12;
polpos->p_rol = cp[15] | cp[14]<<7 | (cp[16] & 0x30) << 10;
polpos->p_stat = cp[1] | cp[0]<<7;
if (cp[2] != ' ')
polpos->p_key = cp[2];
}
/*ARGSUSED*/
tbioctl(tp, cmd, data, flag)
struct tty *tp;
caddr_t data;
{
register struct tb *tbp = (struct tb *)tp->T_LINEP;
switch (cmd) {
case BIOGMODE:
*(int *)data = tbp->tbflags & TBMODE;
break;
case BIOSTYPE:
if (tbconf[*(int *)data & TBTYPE].tbc_recsize == 0 ||
tbconf[*(int *)data & TBTYPE].tbc_decode == 0)
return (EINVAL);
tbp->tbflags &= ~TBTYPE;
tbp->tbflags |= *(int *)data & TBTYPE;
/* fall thru... to set mode bits */
case BIOSMODE: {
register struct tbconf *tc;
tbp->tbflags &= ~TBMODE;
tbp->tbflags |= *(int *)data & TBMODE;
tc = &tbconf[tbp->tbflags & TBTYPE];
if (tbp->tbflags&TBSTOP) {
if (tc->tbc_stop)
ttyout(tc->tbc_stop, tp);
} else if (tc->tbc_start)
ttyout(tc->tbc_start, tp);
if (tbp->tbflags&TBPOINT) {
if (tc->tbc_point)
ttyout(tc->tbc_point, tp);
} else if (tc->tbc_run)
ttyout(tc->tbc_run, tp);
ttstart(tp);
break;
}
case BIOGTYPE:
*(int *)data = tbp->tbflags & TBTYPE;
break;
case TIOCSETD:
case TIOCGETD:
case TIOCGETP:
case TIOCGETC:
return (-1); /* pass thru... */
default:
return (ENOTTY);
}
return (0);
}
#endif