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1.1 root 1: /*-
2: * Copyright (c) 1982, 1986, 1991 The Regents of the University of California.
3: * All rights reserved.
4: *
5: * Redistribution and use in source and binary forms, with or without
6: * modification, are permitted provided that the following conditions
7: * are met:
8: * 1. Redistributions of source code must retain the above copyright
9: * notice, this list of conditions and the following disclaimer.
10: * 2. Redistributions in binary form must reproduce the above copyright
11: * notice, this list of conditions and the following disclaimer in the
12: * documentation and/or other materials provided with the distribution.
13: * 3. All advertising materials mentioning features or use of this software
14: * must display the following acknowledgement:
15: * This product includes software developed by the University of
16: * California, Berkeley and its contributors.
17: * 4. Neither the name of the University nor the names of its contributors
18: * may be used to endorse or promote products derived from this software
19: * without specific prior written permission.
20: *
21: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31: * SUCH DAMAGE.
32: *
1.1.1.3 ! root 33: * from: @(#)tty_tb.c 7.7 (Berkeley) 5/9/91
! 34: * tty_tb.c,v 1.3 1993/05/20 02:55:15 cgd Exp
1.1 root 35: */
36:
37: #include "tb.h"
38: #if NTB > 0
39:
40: /*
41: * Line discipline for RS232 tablets;
42: * supplies binary coordinate data.
43: */
1.1.1.2 root 44:
1.1 root 45: #include "param.h"
1.1.1.2 root 46: #include "ioctl.h"
1.1 root 47: #include "tablet.h"
48: #include "tty.h"
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: tbioctl(tp, BIOSMODE, &modebits, 0);
137: s = spltty();
138: ((struct tb *)tp->T_LINEP)->tbflags = 0;
139: tp->t_cp = 0;
140: tp->t_inbuf = 0;
141: tp->t_rawq.c_cc = 0; /* clear queues -- paranoid */
142: tp->t_canq.c_cc = 0;
143: tp->t_line = 0; /* paranoid: avoid races */
144: splx(s);
145: }
146:
147: /*
148: * Read from a tablet line.
149: * Characters have been buffered in a buffer and decoded.
150: */
151: tbread(tp, uio)
152: register struct tty *tp;
153: struct uio *uio;
154: {
155: register struct tb *tbp = (struct tb *)tp->T_LINEP;
156: register struct tbconf *tc = &tbconf[tbp->tbflags & TBTYPE];
157: int ret;
158:
159: if ((tp->t_state&TS_CARR_ON) == 0)
160: return (EIO);
161: ret = uiomove(&tbp->rets, tc->tbc_uiosize, uio);
162: if (tc->tbc_flags&TBF_POL)
163: tbp->rets.polpos.p_key = ' ';
164: return (ret);
165: }
166:
167: /*
168: * Low level character input routine.
169: * Stuff the character in the buffer, and decode
170: * if all the chars are there.
171: *
172: * This routine could be expanded in-line in the receiver
173: * interrupt routine to make it run as fast as possible.
174: */
175: tbinput(c, tp)
176: register int c;
177: register struct tty *tp;
178: {
179: register struct tb *tbp = (struct tb *)tp->T_LINEP;
180: register struct tbconf *tc = &tbconf[tbp->tbflags & TBTYPE];
181:
182: if (tc->tbc_recsize == 0 || tc->tbc_decode == 0) /* paranoid? */
183: return;
184: /*
185: * Locate sync bit/byte or reset input buffer.
186: */
187: if (c&tc->tbc_sync || tp->t_inbuf == tc->tbc_recsize) {
188: tp->t_cp = tbp->cbuf;
189: tp->t_inbuf = 0;
190: }
191: *tp->t_cp++ = c&0177;
192: /*
193: * Call decode routine only if a full record has been collected.
194: */
195: if (++tp->t_inbuf == tc->tbc_recsize)
196: (*tc->tbc_decode)(tc, tbp->cbuf, &tbp->rets);
197: }
198:
199: /*
200: * Decode GTCO 8 byte format (high res, tilt, and pressure).
201: */
202: static
203: gtcodecode(tc, cp, tbpos)
204: struct tbconf *tc;
205: register char *cp;
206: register struct gtcopos *tbpos;
207: {
208:
209: tbpos->pressure = *cp >> 2;
210: tbpos->status = (tbpos->pressure > 16) | TBINPROX; /* half way down */
211: tbpos->xpos = (*cp++ & 03) << 14;
212: tbpos->xpos |= *cp++ << 7;
213: tbpos->xpos |= *cp++;
214: tbpos->ypos = (*cp++ & 03) << 14;
215: tbpos->ypos |= *cp++ << 7;
216: tbpos->ypos |= *cp++;
217: tbpos->xtilt = *cp++;
218: tbpos->ytilt = *cp++;
219: tbpos->scount++;
220: }
221:
222: /*
223: * Decode old Hitachi 5 byte format (low res).
224: */
225: static
226: tbdecode(tc, cp, tbpos)
227: struct tbconf *tc;
228: register char *cp;
229: register struct tbpos *tbpos;
230: {
231: register char byte;
232:
233: byte = *cp++;
234: tbpos->status = (byte&0100) ? TBINPROX : 0;
235: byte &= ~0100;
236: if (byte > 036)
237: tbpos->status |= 1 << ((byte-040)/2);
238: tbpos->xpos = *cp++ << 7;
239: tbpos->xpos |= *cp++;
240: if (tbpos->xpos < 256) /* tablet wraps around at 256 */
241: tbpos->status &= ~TBINPROX; /* make it out of proximity */
242: tbpos->ypos = *cp++ << 7;
243: tbpos->ypos |= *cp++;
244: tbpos->scount++;
245: }
246:
247: /*
248: * Decode new Hitach 5-byte format (low res).
249: */
250: static
251: tblresdecode(tc, cp, tbpos)
252: struct tbconf *tc;
253: register char *cp;
254: register struct tbpos *tbpos;
255: {
256:
257: *cp &= ~0100; /* mask sync bit */
258: tbpos->status = (*cp++ >> 2) | TBINPROX;
259: if (tc->tbc_flags&TBF_INPROX && tbpos->status&020)
260: tbpos->status &= ~(020|TBINPROX);
261: tbpos->xpos = *cp++;
262: tbpos->xpos |= *cp++ << 6;
263: tbpos->ypos = *cp++;
264: tbpos->ypos |= *cp++ << 6;
265: tbpos->scount++;
266: }
267:
268: /*
269: * Decode new Hitach 6-byte format (high res).
270: */
271: static
272: tbhresdecode(tc, cp, tbpos)
273: struct tbconf *tc;
274: register char *cp;
275: register struct tbpos *tbpos;
276: {
277: char byte;
278:
279: byte = *cp++;
280: tbpos->xpos = (byte & 03) << 14;
281: tbpos->xpos |= *cp++ << 7;
282: tbpos->xpos |= *cp++;
283: tbpos->ypos = *cp++ << 14;
284: tbpos->ypos |= *cp++ << 7;
285: tbpos->ypos |= *cp++;
286: tbpos->status = (byte >> 2) | TBINPROX;
287: if (tc->tbc_flags&TBF_INPROX && tbpos->status&020)
288: tbpos->status &= ~(020|TBINPROX);
289: tbpos->scount++;
290: }
291:
292: /*
293: * Polhemus decode.
294: */
295: static
296: poldecode(tc, cp, polpos)
297: struct tbconf *tc;
298: register char *cp;
299: register struct polpos *polpos;
300: {
301:
302: polpos->p_x = cp[4] | cp[3]<<7 | (cp[9] & 0x03) << 14;
303: polpos->p_y = cp[6] | cp[5]<<7 | (cp[9] & 0x0c) << 12;
304: polpos->p_z = cp[8] | cp[7]<<7 | (cp[9] & 0x30) << 10;
305: polpos->p_azi = cp[11] | cp[10]<<7 | (cp[16] & 0x03) << 14;
306: polpos->p_pit = cp[13] | cp[12]<<7 | (cp[16] & 0x0c) << 12;
307: polpos->p_rol = cp[15] | cp[14]<<7 | (cp[16] & 0x30) << 10;
308: polpos->p_stat = cp[1] | cp[0]<<7;
309: if (cp[2] != ' ')
310: polpos->p_key = cp[2];
311: }
312:
313: /*ARGSUSED*/
314: tbioctl(tp, cmd, data, flag)
315: struct tty *tp;
316: caddr_t data;
317: {
318: register struct tb *tbp = (struct tb *)tp->T_LINEP;
319:
320: switch (cmd) {
321:
322: case BIOGMODE:
323: *(int *)data = tbp->tbflags & TBMODE;
324: break;
325:
326: case BIOSTYPE:
327: if (tbconf[*(int *)data & TBTYPE].tbc_recsize == 0 ||
328: tbconf[*(int *)data & TBTYPE].tbc_decode == 0)
329: return (EINVAL);
330: tbp->tbflags &= ~TBTYPE;
331: tbp->tbflags |= *(int *)data & TBTYPE;
332: /* fall thru... to set mode bits */
333:
334: case BIOSMODE: {
335: register struct tbconf *tc;
336:
337: tbp->tbflags &= ~TBMODE;
338: tbp->tbflags |= *(int *)data & TBMODE;
339: tc = &tbconf[tbp->tbflags & TBTYPE];
340: if (tbp->tbflags&TBSTOP) {
341: if (tc->tbc_stop)
342: ttyout(tc->tbc_stop, tp);
343: } else if (tc->tbc_start)
344: ttyout(tc->tbc_start, tp);
345: if (tbp->tbflags&TBPOINT) {
346: if (tc->tbc_point)
347: ttyout(tc->tbc_point, tp);
348: } else if (tc->tbc_run)
349: ttyout(tc->tbc_run, tp);
350: ttstart(tp);
351: break;
352: }
353:
354: case BIOGTYPE:
355: *(int *)data = tbp->tbflags & TBTYPE;
356: break;
357:
358: case TIOCSETD:
359: case TIOCGETD:
360: case TIOCGETP:
361: case TIOCGETC:
362: return (-1); /* pass thru... */
363:
364: default:
365: return (ENOTTY);
366: }
367: return (0);
368: }
369: #endif
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