[apple/xnu.git] / bsd / kern / tty_tb.c

/*
 * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
 *
 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
 * 
 * This file contains Original Code and/or Modifications of Original Code
 * as defined in and that are subject to the Apple Public Source License
 * Version 2.0 (the 'License'). You may not use this file except in
 * compliance with the License. The rights granted to you under the License
 * may not be used to create, or enable the creation or redistribution of,
 * unlawful or unlicensed copies of an Apple operating system, or to
 * circumvent, violate, or enable the circumvention or violation of, any
 * terms of an Apple operating system software license agreement.
 * 
 * Please obtain a copy of the License at
 * http://www.opensource.apple.com/apsl/ and read it before using this file.
 * 
 * The Original Code and all software distributed under the License are
 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
 * Please see the License for the specific language governing rights and
 * limitations under the License.
 * 
 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
 */
/* Copyright (c) 1997 Apple Computer, Inc. All Rights Reserved */
/*-
 * Copyright (c) 1982, 1986, 1991, 1993
 *	The Regents of the University of California.  All rights reserved.
 *
 *	@(#)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>
#if NeXT
#include <sys/proc_internal.h>
#endif

/*
 * 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;

#ifndef NeXT
	tbioctl(tp, BIOSMODE, &modebits, 0);
#else
	tbioctl(tp, BIOSMODE, &modebits, 0, current_proc());
#endif
	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*/
#ifndef NeXT
tbioctl(tp, cmd, data, flag)
	struct tty *tp;
	caddr_t data;
#else
tbtioctl(tp, cmd, data, flag, p)
	struct tty *tp;
	u_long cmd;
	caddr_t data;
	int flag;
	struct proc *p;
#endif /* !NeXT */
{
	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 /* NTB > 0 */
Commit	Line	Data
1c79356b	1	/*
5d5c5d0d A	2	* Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
5d5c5d0d A	3	*
8f6c56a5	4	* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
1c79356b	5	*
8f6c56a5 A	6	* This file contains Original Code and/or Modifications of Original Code
	7	* as defined in and that are subject to the Apple Public Source License
	8	* Version 2.0 (the 'License'). You may not use this file except in
	9	* compliance with the License. The rights granted to you under the License
	10	* may not be used to create, or enable the creation or redistribution of,
	11	* unlawful or unlicensed copies of an Apple operating system, or to
	12	* circumvent, violate, or enable the circumvention or violation of, any
	13	* terms of an Apple operating system software license agreement.
	14	*
	15	* Please obtain a copy of the License at
	16	* http://www.opensource.apple.com/apsl/ and read it before using this file.
	17	*
	18	* The Original Code and all software distributed under the License are
	19	* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
	20	* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
	21	* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
	22	* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
	23	* Please see the License for the specific language governing rights and
8ad349bb	24	* limitations under the License.
8f6c56a5 A	25	*
8f6c56a5 A	26	* @APPLE_OSREFERENCE_LICENSE_HEADER_END@
1c79356b A	27	*/
	28	/* Copyright (c) 1997 Apple Computer, Inc. All Rights Reserved */
	29	/*-
	30	* Copyright (c) 1982, 1986, 1991, 1993
	31	* The Regents of the University of California. All rights reserved.
	32	*
	33	* @(#)tty_tb.c 8.1 (Berkeley) 6/10/93
	34	*/
	35
	36	#include "tb.h"
	37	#if NTB > 0
	38
	39	/*
	40	* Line discipline for RS232 tablets;
	41	* supplies binary coordinate data.
	42	*/
	43	#include <sys/param.h>
	44	#include <sys/tablet.h>
	45	#include <sys/tty.h>
	46	#if NeXT
91447636	47	#include <sys/proc_internal.h>
1c79356b A	48	#endif
	49
	50	/*
	51	* Tablet configuration table.
	52	*/
	53	struct tbconf {
	54	short tbc_recsize; /* input record size in bytes */
	55	short tbc_uiosize; /* size of data record returned user */
	56	int tbc_sync; /* mask for finding sync byte/bit */
	57	int (tbc_decode)();/ decoding routine */
	58	char tbc_run; / enter run mode sequence */
	59	char tbc_point; / enter point mode sequence */
	60	char tbc_stop; / stop sequence */
	61	char tbc_start; / start/restart sequence */
	62	int tbc_flags;
	63	#define TBF_POL 0x1 /* polhemus hack */
	64	#define TBF_INPROX 0x2 /* tablet has proximity info */
	65	};
	66
	67	static int tbdecode(), gtcodecode(), poldecode();
	68	static int tblresdecode(), tbhresdecode();
	69
	70	struct tbconf tbconf[TBTYPE] = {
	71	{ 0 },
	72	{ 5, sizeof (struct tbpos), 0200, tbdecode, "6", "4" },
	73	{ 5, sizeof (struct tbpos), 0200, tbdecode, "\1CN", "\1RT", "\2", "\4" },
	74	{ 8, sizeof (struct gtcopos), 0200, gtcodecode },
	75	{17, sizeof (struct polpos), 0200, poldecode, 0, 0, "\21", "\5\22\2\23",
	76	TBF_POL },
	77	{ 5, sizeof (struct tbpos), 0100, tblresdecode, "\1CN", "\1PT", "\2", "\4",
	78	TBF_INPROX },
	79	{ 6, sizeof (struct tbpos), 0200, tbhresdecode, "\1CN", "\1PT", "\2", "\4",
	80	TBF_INPROX },
	81	{ 5, sizeof (struct tbpos), 0100, tblresdecode, "\1CL\33", "\1PT\33", 0, 0},
	82	{ 6, sizeof (struct tbpos), 0200, tbhresdecode, "\1CL\33", "\1PT\33", 0, 0},
	83	};
	84
	85	/*
	86	* Tablet state
	87	*/
	88	struct tb {
	89	int tbflags; /* mode & type bits */
	90	#define TBMAXREC 17 /* max input record size */
	91	char cbuf[TBMAXREC]; /* input buffer */
	92	union {
	93	struct tbpos tbpos;
	94	struct gtcopos gtcopos;
	95	struct polpos polpos;
	96	} rets; /* processed state */
	97	#define NTBS 16
	98	} tb[NTBS];
	99
	100	/*
	101	* Open as tablet discipline; called on discipline change.
	102	*/
	103	/ARGSUSED/
	104	tbopen(dev, tp)
	105	dev_t dev;
	106	register struct tty *tp;
	107	{
	108	register struct tb *tbp;
	109
	110	if (tp->t_line == TABLDISC)
	111	return (ENODEV);
112	ttywflush(tp);
113	for (tbp = tb; tbp < &tb[NTBS]; tbp++)
114	if (tbp->tbflags == 0)
115	break;
116	if (tbp >= &tb[NTBS])
117	return (EBUSY);
118	tbp->tbflags = TBTIGER\|TBPOINT; /* default */
119	tp->t_cp = tbp->cbuf;
120	tp->t_inbuf = 0;
121	bzero((caddr_t)&tbp->rets, sizeof (tbp->rets));
122	tp->T_LINEP = (caddr_t)tbp;
123	tp->t_flags \|= LITOUT;
124	return (0);
125	}
126
127	/*
128	* Line discipline change or last device close.
129	*/
130	tbclose(tp)
131	register struct tty *tp;
132	{
133	register int s;
134	int modebits = TBPOINT\|TBSTOP;
135
136	#ifndef NeXT
137	tbioctl(tp, BIOSMODE, &modebits, 0);
138	#else
139	tbioctl(tp, BIOSMODE, &modebits, 0, current_proc());
140	#endif
141	s = spltty();
142	((struct tb *)tp->T_LINEP)->tbflags = 0;
143	tp->t_cp = 0;
144	tp->t_inbuf = 0;
145	tp->t_rawq.c_cc = 0; /* clear queues -- paranoid */
146	tp->t_canq.c_cc = 0;
147	tp->t_line = 0; /* paranoid: avoid races */
148	splx(s);
149	}
150
151	/*
152	* Read from a tablet line.
153	* Characters have been buffered in a buffer and decoded.
154	*/
155	tbread(tp, uio)
156	register struct tty *tp;
157	struct uio *uio;
158	{
159	register struct tb tbp = (struct tb )tp->T_LINEP;
160	register struct tbconf *tc = &tbconf[tbp->tbflags & TBTYPE];
161	int ret;
162
163	if ((tp->t_state&TS_CARR_ON) == 0)
164	return (EIO);
165	ret = uiomove(&tbp->rets, tc->tbc_uiosize, uio);
166	if (tc->tbc_flags&TBF_POL)
167	tbp->rets.polpos.p_key = ' ';
168	return (ret);
169	}
170
171	/*
172	* Low level character input routine.
173	* Stuff the character in the buffer, and decode
174	* if all the chars are there.
175	*
176	* This routine could be expanded in-line in the receiver
177	* interrupt routine to make it run as fast as possible.
178	*/
179	tbinput(c, tp)
180	register int c;
181	register struct tty *tp;
182	{
183	register struct tb tbp = (struct tb )tp->T_LINEP;
184	register struct tbconf *tc = &tbconf[tbp->tbflags & TBTYPE];
185
186	if (tc->tbc_recsize == 0 \|\| tc->tbc_decode == 0) /* paranoid? */
187	return;
188	/*
189	* Locate sync bit/byte or reset input buffer.
190	*/
191	if (c&tc->tbc_sync \|\| tp->t_inbuf == tc->tbc_recsize) {
192	tp->t_cp = tbp->cbuf;
193	tp->t_inbuf = 0;
194	}
195	*tp->t_cp++ = c&0177;
196	/*
197	* Call decode routine only if a full record has been collected.
198	*/
199	if (++tp->t_inbuf == tc->tbc_recsize)
200	(*tc->tbc_decode)(tc, tbp->cbuf, &tbp->rets);
201	}
202
203	/*
204	* Decode GTCO 8 byte format (high res, tilt, and pressure).
205	*/
206	static
207	gtcodecode(tc, cp, tbpos)
208	struct tbconf *tc;
209	register char *cp;
210	register struct gtcopos *tbpos;
211	{
212
213	tbpos->pressure = *cp >> 2;
214	tbpos->status = (tbpos->pressure > 16) \| TBINPROX; /* half way down */
215	tbpos->xpos = (*cp++ & 03) << 14;
216	tbpos->xpos \|= *cp++ << 7;
217	tbpos->xpos \|= *cp++;
218	tbpos->ypos = (*cp++ & 03) << 14;
219	tbpos->ypos \|= *cp++ << 7;
220	tbpos->ypos \|= *cp++;
221	tbpos->xtilt = *cp++;
222	tbpos->ytilt = *cp++;
223	tbpos->scount++;
224	}
225
226	/*
227	* Decode old Hitachi 5 byte format (low res).
228	*/
229	static
230	tbdecode(tc, cp, tbpos)
231	struct tbconf *tc;
232	register char *cp;
233	register struct tbpos *tbpos;
234	{
235	register char byte;
236
237	byte = *cp++;
238	tbpos->status = (byte&0100) ? TBINPROX : 0;
239	byte &= ~0100;
240	if (byte > 036)
241	tbpos->status \|= 1 << ((byte-040)/2);
242	tbpos->xpos = *cp++ << 7;
243	tbpos->xpos \|= *cp++;
244	if (tbpos->xpos < 256) /* tablet wraps around at 256 */
245	tbpos->status &= ~TBINPROX; /* make it out of proximity */
246	tbpos->ypos = *cp++ << 7;
247	tbpos->ypos \|= *cp++;
248	tbpos->scount++;
249	}
250
251	/*
252	* Decode new Hitach 5-byte format (low res).
253	*/
254	static
255	tblresdecode(tc, cp, tbpos)
256	struct tbconf *tc;
257	register char *cp;
258	register struct tbpos *tbpos;
259	{
260
261	cp &= ~0100; / mask sync bit */
262	tbpos->status = (*cp++ >> 2) \| TBINPROX;
263	if (tc->tbc_flags&TBF_INPROX && tbpos->status&020)
264	tbpos->status &= ~(020\|TBINPROX);
265	tbpos->xpos = *cp++;
266	tbpos->xpos \|= *cp++ << 6;
267	tbpos->ypos = *cp++;
268	tbpos->ypos \|= *cp++ << 6;
269	tbpos->scount++;
270	}
271
272	/*
273	* Decode new Hitach 6-byte format (high res).
274	*/
275	static
276	tbhresdecode(tc, cp, tbpos)
277	struct tbconf *tc;
278	register char *cp;
279	register struct tbpos *tbpos;
280	{
281	char byte;
282
283	byte = *cp++;
284	tbpos->xpos = (byte & 03) << 14;
285	tbpos->xpos \|= *cp++ << 7;
286	tbpos->xpos \|= *cp++;
287	tbpos->ypos = *cp++ << 14;
288	tbpos->ypos \|= *cp++ << 7;
289	tbpos->ypos \|= *cp++;
290	tbpos->status = (byte >> 2) \| TBINPROX;
291	if (tc->tbc_flags&TBF_INPROX && tbpos->status&020)
292	tbpos->status &= ~(020\|TBINPROX);
293	tbpos->scount++;
294	}
295
296	/*
297	* Polhemus decode.
298	*/
299	static
300	poldecode(tc, cp, polpos)
301	struct tbconf *tc;
302	register char *cp;
303	register struct polpos *polpos;
304	{
305
306	polpos->p_x = cp[4] \| cp[3]<<7 \| (cp[9] & 0x03) << 14;
307	polpos->p_y = cp[6] \| cp[5]<<7 \| (cp[9] & 0x0c) << 12;
308	polpos->p_z = cp[8] \| cp[7]<<7 \| (cp[9] & 0x30) << 10;
309	polpos->p_azi = cp[11] \| cp[10]<<7 \| (cp[16] & 0x03) << 14;
310	polpos->p_pit = cp[13] \| cp[12]<<7 \| (cp[16] & 0x0c) << 12;
311	polpos->p_rol = cp[15] \| cp[14]<<7 \| (cp[16] & 0x30) << 10;
312	polpos->p_stat = cp[1] \| cp[0]<<7;
313	if (cp[2] != ' ')
314	polpos->p_key = cp[2];
315	}
316
317	/ARGSUSED/
318	#ifndef NeXT
319	tbioctl(tp, cmd, data, flag)
320	struct tty *tp;
321	caddr_t data;
322	#else
323	tbtioctl(tp, cmd, data, flag, p)
324	struct tty *tp;
325	u_long cmd;
326	caddr_t data;
327	int flag;
328	struct proc *p;
329	#endif /* !NeXT */
330	{
331	register struct tb tbp = (struct tb )tp->T_LINEP;
332
333	switch (cmd) {
334
335	case BIOGMODE:
336	(int )data = tbp->tbflags & TBMODE;
337	break;
338
339	case BIOSTYPE:
340	if (tbconf[(int )data & TBTYPE].tbc_recsize == 0 \|\|
341	tbconf[(int )data & TBTYPE].tbc_decode == 0)
342	return (EINVAL);
343	tbp->tbflags &= ~TBTYPE;
344	tbp->tbflags \|= (int )data & TBTYPE;
345	/* fall thru... to set mode bits */
346
347	case BIOSMODE: {
348	register struct tbconf *tc;
349
350	tbp->tbflags &= ~TBMODE;
351	tbp->tbflags \|= (int )data & TBMODE;
352	tc = &tbconf[tbp->tbflags & TBTYPE];
353	if (tbp->tbflags&TBSTOP) {
354	if (tc->tbc_stop)
355	ttyout(tc->tbc_stop, tp);
356	} else if (tc->tbc_start)
357	ttyout(tc->tbc_start, tp);
358	if (tbp->tbflags&TBPOINT) {
359	if (tc->tbc_point)
360	ttyout(tc->tbc_point, tp);
361	} else if (tc->tbc_run)
362	ttyout(tc->tbc_run, tp);
363	ttstart(tp);
364	break;
365	}
366
367	case BIOGTYPE:
368	(int )data = tbp->tbflags & TBTYPE;
369	break;
370
371	case TIOCSETD:
372	case TIOCGETD:
373	case TIOCGETP:
374	case TIOCGETC:
375	return (-1); /* pass thru... */
376
377	default:
378	return (ENOTTY);
379	}
380	return (0);
381	}
382	#endif /* NTB > 0 */