BSD 4.4 Lite Kernel Sources

1 files changed, 366 insertions, 0 deletions

diff --git a/sys/kern/tty_tb.c b/sys/kern/tty_tb.c
new file mode 100644
index 0000000..242301a
--- /dev/null
+++ b/sys/kern/tty_tb.c
@@ -0,0 +1,366 @@
+/*-
+ * 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
+ */
+
+#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