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

/*
 * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
 *
 * @APPLE_LICENSE_OSREFERENCE_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_LICENSE_OSREFERENCE_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	*
8ad349bb	4	* @APPLE_LICENSE_OSREFERENCE_HEADER_START@
1c79356b	5	*
8ad349bb 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
	10	* License may not be used to create, or enable the creation or
	11	* redistribution of, unlawful or unlicensed copies of an Apple operating
	12	* system, or to circumvent, violate, or enable the circumvention or
	13	* violation of, any terms of an Apple operating system software license
	14	* agreement.
	15	*
	16	* Please obtain a copy of the License at
	17	* http://www.opensource.apple.com/apsl/ and read it before using this
	18	* file.
	19	*
	20	* The Original Code and all software distributed under the License are
	21	* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
	22	* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
	23	* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
	24	* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
	25	* Please see the License for the specific language governing rights and
	26	* limitations under the License.
	27	*
	28	* @APPLE_LICENSE_OSREFERENCE_HEADER_END@
1c79356b A	29	*/
	30	/* Copyright (c) 1997 Apple Computer, Inc. All Rights Reserved */
	31	/*-
	32	* Copyright (c) 1982, 1986, 1991, 1993
	33	* The Regents of the University of California. All rights reserved.
	34	*
	35	* @(#)tty_tb.c 8.1 (Berkeley) 6/10/93
	36	*/
	37
	38	#include "tb.h"
	39	#if NTB > 0
	40
	41	/*
	42	* Line discipline for RS232 tablets;
	43	* supplies binary coordinate data.
	44	*/
	45	#include <sys/param.h>
	46	#include <sys/tablet.h>
	47	#include <sys/tty.h>
	48	#if NeXT
91447636	49	#include <sys/proc_internal.h>
1c79356b A	50	#endif
	51
	52	/*
	53	* Tablet configuration table.
	54	*/
	55	struct tbconf {
	56	short tbc_recsize; /* input record size in bytes */
	57	short tbc_uiosize; /* size of data record returned user */
	58	int tbc_sync; /* mask for finding sync byte/bit */
	59	int (tbc_decode)();/ decoding routine */
	60	char tbc_run; / enter run mode sequence */
	61	char tbc_point; / enter point mode sequence */
	62	char tbc_stop; / stop sequence */
	63	char tbc_start; / start/restart sequence */
	64	int tbc_flags;
	65	#define TBF_POL 0x1 /* polhemus hack */
	66	#define TBF_INPROX 0x2 /* tablet has proximity info */
	67	};
	68
	69	static int tbdecode(), gtcodecode(), poldecode();
	70	static int tblresdecode(), tbhresdecode();
	71
	72	struct tbconf tbconf[TBTYPE] = {
	73	{ 0 },
	74	{ 5, sizeof (struct tbpos), 0200, tbdecode, "6", "4" },
	75	{ 5, sizeof (struct tbpos), 0200, tbdecode, "\1CN", "\1RT", "\2", "\4" },
	76	{ 8, sizeof (struct gtcopos), 0200, gtcodecode },
	77	{17, sizeof (struct polpos), 0200, poldecode, 0, 0, "\21", "\5\22\2\23",
	78	TBF_POL },
	79	{ 5, sizeof (struct tbpos), 0100, tblresdecode, "\1CN", "\1PT", "\2", "\4",
	80	TBF_INPROX },
	81	{ 6, sizeof (struct tbpos), 0200, tbhresdecode, "\1CN", "\1PT", "\2", "\4",
	82	TBF_INPROX },
	83	{ 5, sizeof (struct tbpos), 0100, tblresdecode, "\1CL\33", "\1PT\33", 0, 0},
	84	{ 6, sizeof (struct tbpos), 0200, tbhresdecode, "\1CL\33", "\1PT\33", 0, 0},
	85	};
	86
	87	/*
	88	* Tablet state
	89	*/
	90	struct tb {
	91	int tbflags; /* mode & type bits */
	92	#define TBMAXREC 17 /* max input record size */
	93	char cbuf[TBMAXREC]; /* input buffer */
	94	union {
	95	struct tbpos tbpos;
	96	struct gtcopos gtcopos;
	97	struct polpos polpos;
	98	} rets; /* processed state */
	99	#define NTBS 16
	100	} tb[NTBS];
	101
	102	/*
	103	* Open as tablet discipline; called on discipline change.
	104	*/
	105	/ARGSUSED/
	106	tbopen(dev, tp)
	107	dev_t dev;
	108	register struct tty *tp;
	109	{
	110	register struct tb *tbp;
	111
	112	if (tp->t_line == TABLDISC)
	113	return (ENODEV);
114	ttywflush(tp);
115	for (tbp = tb; tbp < &tb[NTBS]; tbp++)
116	if (tbp->tbflags == 0)
117	break;
118	if (tbp >= &tb[NTBS])
119	return (EBUSY);
120	tbp->tbflags = TBTIGER\|TBPOINT; /* default */
121	tp->t_cp = tbp->cbuf;
122	tp->t_inbuf = 0;
123	bzero((caddr_t)&tbp->rets, sizeof (tbp->rets));
124	tp->T_LINEP = (caddr_t)tbp;
125	tp->t_flags \|= LITOUT;
126	return (0);
127	}
128
129	/*
130	* Line discipline change or last device close.
131	*/
132	tbclose(tp)
133	register struct tty *tp;
134	{
135	register int s;
136	int modebits = TBPOINT\|TBSTOP;
137
138	#ifndef NeXT
139	tbioctl(tp, BIOSMODE, &modebits, 0);
140	#else
141	tbioctl(tp, BIOSMODE, &modebits, 0, current_proc());
142	#endif
143	s = spltty();
144	((struct tb *)tp->T_LINEP)->tbflags = 0;
145	tp->t_cp = 0;
146	tp->t_inbuf = 0;
147	tp->t_rawq.c_cc = 0; /* clear queues -- paranoid */
148	tp->t_canq.c_cc = 0;
149	tp->t_line = 0; /* paranoid: avoid races */
150	splx(s);
151	}
152
153	/*
154	* Read from a tablet line.
155	* Characters have been buffered in a buffer and decoded.
156	*/
157	tbread(tp, uio)
158	register struct tty *tp;
159	struct uio *uio;
160	{
161	register struct tb tbp = (struct tb )tp->T_LINEP;
162	register struct tbconf *tc = &tbconf[tbp->tbflags & TBTYPE];
163	int ret;
164
165	if ((tp->t_state&TS_CARR_ON) == 0)
166	return (EIO);
167	ret = uiomove(&tbp->rets, tc->tbc_uiosize, uio);
168	if (tc->tbc_flags&TBF_POL)
169	tbp->rets.polpos.p_key = ' ';
170	return (ret);
171	}
172
173	/*
174	* Low level character input routine.
175	* Stuff the character in the buffer, and decode
176	* if all the chars are there.
177	*
178	* This routine could be expanded in-line in the receiver
179	* interrupt routine to make it run as fast as possible.
180	*/
181	tbinput(c, tp)
182	register int c;
183	register struct tty *tp;
184	{
185	register struct tb tbp = (struct tb )tp->T_LINEP;
186	register struct tbconf *tc = &tbconf[tbp->tbflags & TBTYPE];
187
188	if (tc->tbc_recsize == 0 \|\| tc->tbc_decode == 0) /* paranoid? */
189	return;
190	/*
191	* Locate sync bit/byte or reset input buffer.
192	*/
193	if (c&tc->tbc_sync \|\| tp->t_inbuf == tc->tbc_recsize) {
194	tp->t_cp = tbp->cbuf;
195	tp->t_inbuf = 0;
196	}
197	*tp->t_cp++ = c&0177;
198	/*
199	* Call decode routine only if a full record has been collected.
200	*/
201	if (++tp->t_inbuf == tc->tbc_recsize)
202	(*tc->tbc_decode)(tc, tbp->cbuf, &tbp->rets);
203	}
204
205	/*
206	* Decode GTCO 8 byte format (high res, tilt, and pressure).
207	*/
208	static
209	gtcodecode(tc, cp, tbpos)
210	struct tbconf *tc;
211	register char *cp;
212	register struct gtcopos *tbpos;
213	{
214
215	tbpos->pressure = *cp >> 2;
216	tbpos->status = (tbpos->pressure > 16) \| TBINPROX; /* half way down */
217	tbpos->xpos = (*cp++ & 03) << 14;
218	tbpos->xpos \|= *cp++ << 7;
219	tbpos->xpos \|= *cp++;
220	tbpos->ypos = (*cp++ & 03) << 14;
221	tbpos->ypos \|= *cp++ << 7;
222	tbpos->ypos \|= *cp++;
223	tbpos->xtilt = *cp++;
224	tbpos->ytilt = *cp++;
225	tbpos->scount++;
226	}
227
228	/*
229	* Decode old Hitachi 5 byte format (low res).
230	*/
231	static
232	tbdecode(tc, cp, tbpos)
233	struct tbconf *tc;
234	register char *cp;
235	register struct tbpos *tbpos;
236	{
237	register char byte;
238
239	byte = *cp++;
240	tbpos->status = (byte&0100) ? TBINPROX : 0;
241	byte &= ~0100;
242	if (byte > 036)
243	tbpos->status \|= 1 << ((byte-040)/2);
244	tbpos->xpos = *cp++ << 7;
245	tbpos->xpos \|= *cp++;
246	if (tbpos->xpos < 256) /* tablet wraps around at 256 */
247	tbpos->status &= ~TBINPROX; /* make it out of proximity */
248	tbpos->ypos = *cp++ << 7;
249	tbpos->ypos \|= *cp++;
250	tbpos->scount++;
251	}
252
253	/*
254	* Decode new Hitach 5-byte format (low res).
255	*/
256	static
257	tblresdecode(tc, cp, tbpos)
258	struct tbconf *tc;
259	register char *cp;
260	register struct tbpos *tbpos;
261	{
262
263	cp &= ~0100; / mask sync bit */
264	tbpos->status = (*cp++ >> 2) \| TBINPROX;
265	if (tc->tbc_flags&TBF_INPROX && tbpos->status&020)
266	tbpos->status &= ~(020\|TBINPROX);
267	tbpos->xpos = *cp++;
268	tbpos->xpos \|= *cp++ << 6;
269	tbpos->ypos = *cp++;
270	tbpos->ypos \|= *cp++ << 6;
271	tbpos->scount++;
272	}
273
274	/*
275	* Decode new Hitach 6-byte format (high res).
276	*/
277	static
278	tbhresdecode(tc, cp, tbpos)
279	struct tbconf *tc;
280	register char *cp;
281	register struct tbpos *tbpos;
282	{
283	char byte;
284
285	byte = *cp++;
286	tbpos->xpos = (byte & 03) << 14;
287	tbpos->xpos \|= *cp++ << 7;
288	tbpos->xpos \|= *cp++;
289	tbpos->ypos = *cp++ << 14;
290	tbpos->ypos \|= *cp++ << 7;
291	tbpos->ypos \|= *cp++;
292	tbpos->status = (byte >> 2) \| TBINPROX;
293	if (tc->tbc_flags&TBF_INPROX && tbpos->status&020)
294	tbpos->status &= ~(020\|TBINPROX);
295	tbpos->scount++;
296	}
297
298	/*
299	* Polhemus decode.
300	*/
301	static
302	poldecode(tc, cp, polpos)
303	struct tbconf *tc;
304	register char *cp;
305	register struct polpos *polpos;
306	{
307
308	polpos->p_x = cp[4] \| cp[3]<<7 \| (cp[9] & 0x03) << 14;
309	polpos->p_y = cp[6] \| cp[5]<<7 \| (cp[9] & 0x0c) << 12;
310	polpos->p_z = cp[8] \| cp[7]<<7 \| (cp[9] & 0x30) << 10;
311	polpos->p_azi = cp[11] \| cp[10]<<7 \| (cp[16] & 0x03) << 14;
312	polpos->p_pit = cp[13] \| cp[12]<<7 \| (cp[16] & 0x0c) << 12;
313	polpos->p_rol = cp[15] \| cp[14]<<7 \| (cp[16] & 0x30) << 10;
314	polpos->p_stat = cp[1] \| cp[0]<<7;
315	if (cp[2] != ' ')
316	polpos->p_key = cp[2];
317	}
318
319	/ARGSUSED/
320	#ifndef NeXT
321	tbioctl(tp, cmd, data, flag)
322	struct tty *tp;
323	caddr_t data;
324	#else
325	tbtioctl(tp, cmd, data, flag, p)
326	struct tty *tp;
327	u_long cmd;
328	caddr_t data;
329	int flag;
330	struct proc *p;
331	#endif /* !NeXT */
332	{
333	register struct tb tbp = (struct tb )tp->T_LINEP;
334
335	switch (cmd) {
336
337	case BIOGMODE:
338	(int )data = tbp->tbflags & TBMODE;
339	break;
340
341	case BIOSTYPE:
342	if (tbconf[(int )data & TBTYPE].tbc_recsize == 0 \|\|
343	tbconf[(int )data & TBTYPE].tbc_decode == 0)
344	return (EINVAL);
345	tbp->tbflags &= ~TBTYPE;
346	tbp->tbflags \|= (int )data & TBTYPE;
347	/* fall thru... to set mode bits */
348
349	case BIOSMODE: {
350	register struct tbconf *tc;
351
352	tbp->tbflags &= ~TBMODE;
353	tbp->tbflags \|= (int )data & TBMODE;
354	tc = &tbconf[tbp->tbflags & TBTYPE];
355	if (tbp->tbflags&TBSTOP) {
356	if (tc->tbc_stop)
357	ttyout(tc->tbc_stop, tp);
358	} else if (tc->tbc_start)
359	ttyout(tc->tbc_start, tp);
360	if (tbp->tbflags&TBPOINT) {
361	if (tc->tbc_point)
362	ttyout(tc->tbc_point, tp);
363	} else if (tc->tbc_run)
364	ttyout(tc->tbc_run, tp);
365	ttstart(tp);
366	break;
367	}
368
369	case BIOGTYPE:
370	(int )data = tbp->tbflags & TBTYPE;
371	break;
372
373	case TIOCSETD:
374	case TIOCGETD:
375	case TIOCGETP:
376	case TIOCGETC:
377	return (-1); /* pass thru... */
378
379	default:
380	return (ENOTTY);
381	}
382	return (0);
383	}
384	#endif /* NTB > 0 */