usr/src/sys/kern/tty_tb.c

/*
 * Copyright (c) 1982, 1986 Regents of the University of California.
 * All rights reserved.  The Berkeley software License Agreement
 * specifies the terms and conditions for redistribution.
 *
 *	@(#)tty_tb.c	7.6 (Berkeley) %G%
 */

#include "tb.h"
#if NTB > 0

/*
 * Line discipline for RS232 tablets;
 * supplies binary coordinate data.
 */
#include "param.h"
#include "tablet.h"
#include "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
Commit	Line	Data
	1	/*
	2	* Copyright (c) 1982, 1986 Regents of the University of California.
	3	* All rights reserved. The Berkeley software License Agreement
	4	* specifies the terms and conditions for redistribution.
	5	*
	6	* @(#)tty_tb.c 7.6 (Berkeley) %G%
	7	*/
	8
	9	#include "tb.h"
	10	#if NTB > 0
	11
	12	/*
	13	* Line discipline for RS232 tablets;
	14	* supplies binary coordinate data.
	15	*/
	16	#include "param.h"
	17	#include "tablet.h"
	18	#include "tty.h"
	19
	20	/*
	21	* Tablet configuration table.
	22	*/
	23	struct tbconf {
	24	short tbc_recsize; /* input record size in bytes */
	25	short tbc_uiosize; /* size of data record returned user */
	26	int tbc_sync; /* mask for finding sync byte/bit */
	27	int (tbc_decode)();/ decoding routine */
	28	char tbc_run; / enter run mode sequence */
	29	char tbc_point; / enter point mode sequence */
	30	char tbc_stop; / stop sequence */
	31	char tbc_start; / start/restart sequence */
	32	int tbc_flags;
	33	#define TBF_POL 0x1 /* polhemus hack */
	34	#define TBF_INPROX 0x2 /* tablet has proximity info */
	35	};
	36
	37	static int tbdecode(), gtcodecode(), poldecode();
	38	static int tblresdecode(), tbhresdecode();
	39
	40	struct tbconf tbconf[TBTYPE] = {
	41	{ 0 },
	42	{ 5, sizeof (struct tbpos), 0200, tbdecode, "6", "4" },
	43	{ 5, sizeof (struct tbpos), 0200, tbdecode, "\1CN", "\1RT", "\2", "\4" },
	44	{ 8, sizeof (struct gtcopos), 0200, gtcodecode },
	45	{17, sizeof (struct polpos), 0200, poldecode, 0, 0, "\21", "\5\22\2\23",
	46	TBF_POL },
	47	{ 5, sizeof (struct tbpos), 0100, tblresdecode, "\1CN", "\1PT", "\2", "\4",
	48	TBF_INPROX },
	49	{ 6, sizeof (struct tbpos), 0200, tbhresdecode, "\1CN", "\1PT", "\2", "\4",
	50	TBF_INPROX },
	51	{ 5, sizeof (struct tbpos), 0100, tblresdecode, "\1CL\33", "\1PT\33", 0, 0},
	52	{ 6, sizeof (struct tbpos), 0200, tbhresdecode, "\1CL\33", "\1PT\33", 0, 0},
	53	};
	54
	55	/*
	56	* Tablet state
	57	*/
	58	struct tb {
	59	int tbflags; /* mode & type bits */
	60	#define TBMAXREC 17 /* max input record size */
	61	char cbuf[TBMAXREC]; /* input buffer */
	62	union {
	63	struct tbpos tbpos;
	64	struct gtcopos gtcopos;
	65	struct polpos polpos;
	66	} rets; /* processed state */
	67	#define NTBS 16
	68	} tb[NTBS];
	69
	70	/*
	71	* Open as tablet discipline; called on discipline change.
	72	*/
	73	/ARGSUSED/
	74	tbopen(dev, tp)
	75	dev_t dev;
	76	register struct tty *tp;
	77	{
	78	register struct tb *tbp;
	79
	80	if (tp->t_line == TABLDISC)
	81	return (ENODEV);
	82	ttywflush(tp);
	83	for (tbp = tb; tbp < &tb[NTBS]; tbp++)
	84	if (tbp->tbflags == 0)
	85	break;
	86	if (tbp >= &tb[NTBS])
	87	return (EBUSY);
	88	tbp->tbflags = TBTIGER\|TBPOINT; /* default */
	89	tp->t_cp = tbp->cbuf;
	90	tp->t_inbuf = 0;
	91	bzero((caddr_t)&tbp->rets, sizeof (tbp->rets));
	92	tp->T_LINEP = (caddr_t)tbp;
	93	tp->t_flags \|= LITOUT;
	94	return (0);
	95	}
	96
	97	/*
	98	* Line discipline change or last device close.
	99	*/
	100	tbclose(tp)
	101	register struct tty *tp;
	102	{
	103	register int s;
	104	int modebits = TBPOINT\|TBSTOP;
	105
	106	tbioctl(tp, BIOSMODE, &modebits, 0);
	107	s = spltty();
	108	((struct tb *)tp->T_LINEP)->tbflags = 0;
	109	tp->t_cp = 0;
	110	tp->t_inbuf = 0;
	111	tp->t_rawq.c_cc = 0; /* clear queues -- paranoid */
	112	tp->t_canq.c_cc = 0;
	113	tp->t_line = 0; /* paranoid: avoid races */
	114	splx(s);
	115	}
	116
	117	/*
	118	* Read from a tablet line.
	119	* Characters have been buffered in a buffer and decoded.
	120	*/
	121	tbread(tp, uio)
	122	register struct tty *tp;
	123	struct uio *uio;
	124	{
	125	register struct tb tbp = (struct tb )tp->T_LINEP;
	126	register struct tbconf *tc = &tbconf[tbp->tbflags & TBTYPE];
	127	int ret;
	128
	129	if ((tp->t_state&TS_CARR_ON) == 0)
	130	return (EIO);
	131	ret = uiomove(&tbp->rets, tc->tbc_uiosize, uio);
	132	if (tc->tbc_flags&TBF_POL)
	133	tbp->rets.polpos.p_key = ' ';
	134	return (ret);
	135	}
	136
	137	/*
	138	* Low level character input routine.
	139	* Stuff the character in the buffer, and decode
	140	* if all the chars are there.
	141	*
	142	* This routine could be expanded in-line in the receiver
	143	* interrupt routine to make it run as fast as possible.
	144	*/
	145	tbinput(c, tp)
	146	register int c;
	147	register struct tty *tp;
	148	{
	149	register struct tb tbp = (struct tb )tp->T_LINEP;
	150	register struct tbconf *tc = &tbconf[tbp->tbflags & TBTYPE];
	151
	152	if (tc->tbc_recsize == 0 \|\| tc->tbc_decode == 0) /* paranoid? */
	153	return;
	154	/*
	155	* Locate sync bit/byte or reset input buffer.
	156	*/
	157	if (c&tc->tbc_sync \|\| tp->t_inbuf == tc->tbc_recsize) {
	158	tp->t_cp = tbp->cbuf;
	159	tp->t_inbuf = 0;
	160	}
	161	*tp->t_cp++ = c&0177;
	162	/*
	163	* Call decode routine only if a full record has been collected.
	164	*/
	165	if (++tp->t_inbuf == tc->tbc_recsize)
	166	(*tc->tbc_decode)(tc, tbp->cbuf, &tbp->rets);
	167	}
	168
	169	/*
	170	* Decode GTCO 8 byte format (high res, tilt, and pressure).
	171	*/
	172	static
	173	gtcodecode(tc, cp, tbpos)
	174	struct tbconf *tc;
	175	register char *cp;
	176	register struct gtcopos *tbpos;
	177	{
	178
	179	tbpos->pressure = *cp >> 2;
	180	tbpos->status = (tbpos->pressure > 16) \| TBINPROX; /* half way down */
	181	tbpos->xpos = (*cp++ & 03) << 14;
	182	tbpos->xpos \|= *cp++ << 7;
	183	tbpos->xpos \|= *cp++;
	184	tbpos->ypos = (*cp++ & 03) << 14;
	185	tbpos->ypos \|= *cp++ << 7;
	186	tbpos->ypos \|= *cp++;
	187	tbpos->xtilt = *cp++;
	188	tbpos->ytilt = *cp++;
	189	tbpos->scount++;
	190	}
	191
	192	/*
	193	* Decode old Hitachi 5 byte format (low res).
	194	*/
	195	static
	196	tbdecode(tc, cp, tbpos)
	197	struct tbconf *tc;
	198	register char *cp;
	199	register struct tbpos *tbpos;
	200	{
	201	register char byte;
	202
	203	byte = *cp++;
	204	tbpos->status = (byte&0100) ? TBINPROX : 0;
	205	byte &= ~0100;
	206	if (byte > 036)
	207	tbpos->status \|= 1 << ((byte-040)/2);
	208	tbpos->xpos = *cp++ << 7;
	209	tbpos->xpos \|= *cp++;
	210	if (tbpos->xpos < 256) /* tablet wraps around at 256 */
	211	tbpos->status &= ~TBINPROX; /* make it out of proximity */
	212	tbpos->ypos = *cp++ << 7;
	213	tbpos->ypos \|= *cp++;
	214	tbpos->scount++;
	215	}
	216
	217	/*
	218	* Decode new Hitach 5-byte format (low res).
	219	*/
	220	static
	221	tblresdecode(tc, cp, tbpos)
	222	struct tbconf *tc;
	223	register char *cp;
	224	register struct tbpos *tbpos;
	225	{
	226
	227	cp &= ~0100; / mask sync bit */
	228	tbpos->status = (*cp++ >> 2) \| TBINPROX;
	229	if (tc->tbc_flags&TBF_INPROX && tbpos->status&020)
	230	tbpos->status &= ~(020\|TBINPROX);
	231	tbpos->xpos = *cp++;
	232	tbpos->xpos \|= *cp++ << 6;
	233	tbpos->ypos = *cp++;
	234	tbpos->ypos \|= *cp++ << 6;
	235	tbpos->scount++;
	236	}
	237
	238	/*
	239	* Decode new Hitach 6-byte format (high res).
	240	*/
	241	static
	242	tbhresdecode(tc, cp, tbpos)
	243	struct tbconf *tc;
	244	register char *cp;
	245	register struct tbpos *tbpos;
	246	{
	247	char byte;
	248
	249	byte = *cp++;
	250	tbpos->xpos = (byte & 03) << 14;
	251	tbpos->xpos \|= *cp++ << 7;
	252	tbpos->xpos \|= *cp++;
	253	tbpos->ypos = *cp++ << 14;
	254	tbpos->ypos \|= *cp++ << 7;
	255	tbpos->ypos \|= *cp++;
	256	tbpos->status = (byte >> 2) \| TBINPROX;
	257	if (tc->tbc_flags&TBF_INPROX && tbpos->status&020)
	258	tbpos->status &= ~(020\|TBINPROX);
	259	tbpos->scount++;
	260	}
	261
	262	/*
	263	* Polhemus decode.
	264	*/
	265	static
	266	poldecode(tc, cp, polpos)
	267	struct tbconf *tc;
	268	register char *cp;
	269	register struct polpos *polpos;
	270	{
	271
	272	polpos->p_x = cp[4] \| cp[3]<<7 \| (cp[9] & 0x03) << 14;
	273	polpos->p_y = cp[6] \| cp[5]<<7 \| (cp[9] & 0x0c) << 12;
	274	polpos->p_z = cp[8] \| cp[7]<<7 \| (cp[9] & 0x30) << 10;
	275	polpos->p_azi = cp[11] \| cp[10]<<7 \| (cp[16] & 0x03) << 14;
	276	polpos->p_pit = cp[13] \| cp[12]<<7 \| (cp[16] & 0x0c) << 12;
	277	polpos->p_rol = cp[15] \| cp[14]<<7 \| (cp[16] & 0x30) << 10;
	278	polpos->p_stat = cp[1] \| cp[0]<<7;
	279	if (cp[2] != ' ')
	280	polpos->p_key = cp[2];
	281	}
	282
	283	/ARGSUSED/
	284	tbioctl(tp, cmd, data, flag)
	285	struct tty *tp;
	286	caddr_t data;
	287	{
	288	register struct tb tbp = (struct tb )tp->T_LINEP;
	289
	290	switch (cmd) {
	291
	292	case BIOGMODE:
	293	(int )data = tbp->tbflags & TBMODE;
	294	break;
	295
	296	case BIOSTYPE:
	297	if (tbconf[(int )data & TBTYPE].tbc_recsize == 0 \|\|
	298	tbconf[(int )data & TBTYPE].tbc_decode == 0)
	299	return (EINVAL);
	300	tbp->tbflags &= ~TBTYPE;
	301	tbp->tbflags \|= (int )data & TBTYPE;
	302	/* fall thru... to set mode bits */
	303
	304	case BIOSMODE: {
	305	register struct tbconf *tc;
	306
	307	tbp->tbflags &= ~TBMODE;
	308	tbp->tbflags \|= (int )data & TBMODE;
	309	tc = &tbconf[tbp->tbflags & TBTYPE];
	310	if (tbp->tbflags&TBSTOP) {
	311	if (tc->tbc_stop)
	312	ttyout(tc->tbc_stop, tp);
	313	} else if (tc->tbc_start)
	314	ttyout(tc->tbc_start, tp);
	315	if (tbp->tbflags&TBPOINT) {
	316	if (tc->tbc_point)
	317	ttyout(tc->tbc_point, tp);
	318	} else if (tc->tbc_run)
	319	ttyout(tc->tbc_run, tp);
	320	ttstart(tp);
	321	break;
	322	}
	323
	324	case BIOGTYPE:
	325	(int )data = tbp->tbflags & TBTYPE;
	326	break;
	327
	328	case TIOCSETD:
	329	case TIOCGETD:
	330	case TIOCGETP:
	331	case TIOCGETC:
	332	return (-1); /* pass thru... */
	333
	334	default:
	335	return (ENOTTY);
	336	}
	337	return (0);
	338	}
	339	#endif