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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: *
33: * @(#)tty_tb.c 7.7 (Berkeley) 5/9/91
34: */
35:
36: #include "tb.h"
37: #if NTB > 0
38:
39: /*
40: * Line discipline for RS232 tablets;
41: * supplies binary coordinate data.
42: */
1.1.1.2 ! root 43:
1.1 root 44: #include "param.h"
1.1.1.2 ! root 45: #include "ioctl.h"
1.1 root 46: #include "tablet.h"
47: #include "tty.h"
48:
49: /*
50: * Tablet configuration table.
51: */
52: struct tbconf {
53: short tbc_recsize; /* input record size in bytes */
54: short tbc_uiosize; /* size of data record returned user */
55: int tbc_sync; /* mask for finding sync byte/bit */
56: int (*tbc_decode)();/* decoding routine */
57: char *tbc_run; /* enter run mode sequence */
58: char *tbc_point; /* enter point mode sequence */
59: char *tbc_stop; /* stop sequence */
60: char *tbc_start; /* start/restart sequence */
61: int tbc_flags;
62: #define TBF_POL 0x1 /* polhemus hack */
63: #define TBF_INPROX 0x2 /* tablet has proximity info */
64: };
65:
66: static int tbdecode(), gtcodecode(), poldecode();
67: static int tblresdecode(), tbhresdecode();
68:
69: struct tbconf tbconf[TBTYPE] = {
70: { 0 },
71: { 5, sizeof (struct tbpos), 0200, tbdecode, "6", "4" },
72: { 5, sizeof (struct tbpos), 0200, tbdecode, "\1CN", "\1RT", "\2", "\4" },
73: { 8, sizeof (struct gtcopos), 0200, gtcodecode },
74: {17, sizeof (struct polpos), 0200, poldecode, 0, 0, "\21", "\5\22\2\23",
75: TBF_POL },
76: { 5, sizeof (struct tbpos), 0100, tblresdecode, "\1CN", "\1PT", "\2", "\4",
77: TBF_INPROX },
78: { 6, sizeof (struct tbpos), 0200, tbhresdecode, "\1CN", "\1PT", "\2", "\4",
79: TBF_INPROX },
80: { 5, sizeof (struct tbpos), 0100, tblresdecode, "\1CL\33", "\1PT\33", 0, 0},
81: { 6, sizeof (struct tbpos), 0200, tbhresdecode, "\1CL\33", "\1PT\33", 0, 0},
82: };
83:
84: /*
85: * Tablet state
86: */
87: struct tb {
88: int tbflags; /* mode & type bits */
89: #define TBMAXREC 17 /* max input record size */
90: char cbuf[TBMAXREC]; /* input buffer */
91: union {
92: struct tbpos tbpos;
93: struct gtcopos gtcopos;
94: struct polpos polpos;
95: } rets; /* processed state */
96: #define NTBS 16
97: } tb[NTBS];
98:
99: /*
100: * Open as tablet discipline; called on discipline change.
101: */
102: /*ARGSUSED*/
103: tbopen(dev, tp)
104: dev_t dev;
105: register struct tty *tp;
106: {
107: register struct tb *tbp;
108:
109: if (tp->t_line == TABLDISC)
110: return (ENODEV);
111: ttywflush(tp);
112: for (tbp = tb; tbp < &tb[NTBS]; tbp++)
113: if (tbp->tbflags == 0)
114: break;
115: if (tbp >= &tb[NTBS])
116: return (EBUSY);
117: tbp->tbflags = TBTIGER|TBPOINT; /* default */
118: tp->t_cp = tbp->cbuf;
119: tp->t_inbuf = 0;
120: bzero((caddr_t)&tbp->rets, sizeof (tbp->rets));
121: tp->T_LINEP = (caddr_t)tbp;
122: tp->t_flags |= LITOUT;
123: return (0);
124: }
125:
126: /*
127: * Line discipline change or last device close.
128: */
129: tbclose(tp)
130: register struct tty *tp;
131: {
132: register int s;
133: int modebits = TBPOINT|TBSTOP;
134:
135: tbioctl(tp, BIOSMODE, &modebits, 0);
136: s = spltty();
137: ((struct tb *)tp->T_LINEP)->tbflags = 0;
138: tp->t_cp = 0;
139: tp->t_inbuf = 0;
140: tp->t_rawq.c_cc = 0; /* clear queues -- paranoid */
141: tp->t_canq.c_cc = 0;
142: tp->t_line = 0; /* paranoid: avoid races */
143: splx(s);
144: }
145:
146: /*
147: * Read from a tablet line.
148: * Characters have been buffered in a buffer and decoded.
149: */
150: tbread(tp, uio)
151: register struct tty *tp;
152: struct uio *uio;
153: {
154: register struct tb *tbp = (struct tb *)tp->T_LINEP;
155: register struct tbconf *tc = &tbconf[tbp->tbflags & TBTYPE];
156: int ret;
157:
158: if ((tp->t_state&TS_CARR_ON) == 0)
159: return (EIO);
160: ret = uiomove(&tbp->rets, tc->tbc_uiosize, uio);
161: if (tc->tbc_flags&TBF_POL)
162: tbp->rets.polpos.p_key = ' ';
163: return (ret);
164: }
165:
166: /*
167: * Low level character input routine.
168: * Stuff the character in the buffer, and decode
169: * if all the chars are there.
170: *
171: * This routine could be expanded in-line in the receiver
172: * interrupt routine to make it run as fast as possible.
173: */
174: tbinput(c, tp)
175: register int c;
176: register struct tty *tp;
177: {
178: register struct tb *tbp = (struct tb *)tp->T_LINEP;
179: register struct tbconf *tc = &tbconf[tbp->tbflags & TBTYPE];
180:
181: if (tc->tbc_recsize == 0 || tc->tbc_decode == 0) /* paranoid? */
182: return;
183: /*
184: * Locate sync bit/byte or reset input buffer.
185: */
186: if (c&tc->tbc_sync || tp->t_inbuf == tc->tbc_recsize) {
187: tp->t_cp = tbp->cbuf;
188: tp->t_inbuf = 0;
189: }
190: *tp->t_cp++ = c&0177;
191: /*
192: * Call decode routine only if a full record has been collected.
193: */
194: if (++tp->t_inbuf == tc->tbc_recsize)
195: (*tc->tbc_decode)(tc, tbp->cbuf, &tbp->rets);
196: }
197:
198: /*
199: * Decode GTCO 8 byte format (high res, tilt, and pressure).
200: */
201: static
202: gtcodecode(tc, cp, tbpos)
203: struct tbconf *tc;
204: register char *cp;
205: register struct gtcopos *tbpos;
206: {
207:
208: tbpos->pressure = *cp >> 2;
209: tbpos->status = (tbpos->pressure > 16) | TBINPROX; /* half way down */
210: tbpos->xpos = (*cp++ & 03) << 14;
211: tbpos->xpos |= *cp++ << 7;
212: tbpos->xpos |= *cp++;
213: tbpos->ypos = (*cp++ & 03) << 14;
214: tbpos->ypos |= *cp++ << 7;
215: tbpos->ypos |= *cp++;
216: tbpos->xtilt = *cp++;
217: tbpos->ytilt = *cp++;
218: tbpos->scount++;
219: }
220:
221: /*
222: * Decode old Hitachi 5 byte format (low res).
223: */
224: static
225: tbdecode(tc, cp, tbpos)
226: struct tbconf *tc;
227: register char *cp;
228: register struct tbpos *tbpos;
229: {
230: register char byte;
231:
232: byte = *cp++;
233: tbpos->status = (byte&0100) ? TBINPROX : 0;
234: byte &= ~0100;
235: if (byte > 036)
236: tbpos->status |= 1 << ((byte-040)/2);
237: tbpos->xpos = *cp++ << 7;
238: tbpos->xpos |= *cp++;
239: if (tbpos->xpos < 256) /* tablet wraps around at 256 */
240: tbpos->status &= ~TBINPROX; /* make it out of proximity */
241: tbpos->ypos = *cp++ << 7;
242: tbpos->ypos |= *cp++;
243: tbpos->scount++;
244: }
245:
246: /*
247: * Decode new Hitach 5-byte format (low res).
248: */
249: static
250: tblresdecode(tc, cp, tbpos)
251: struct tbconf *tc;
252: register char *cp;
253: register struct tbpos *tbpos;
254: {
255:
256: *cp &= ~0100; /* mask sync bit */
257: tbpos->status = (*cp++ >> 2) | TBINPROX;
258: if (tc->tbc_flags&TBF_INPROX && tbpos->status&020)
259: tbpos->status &= ~(020|TBINPROX);
260: tbpos->xpos = *cp++;
261: tbpos->xpos |= *cp++ << 6;
262: tbpos->ypos = *cp++;
263: tbpos->ypos |= *cp++ << 6;
264: tbpos->scount++;
265: }
266:
267: /*
268: * Decode new Hitach 6-byte format (high res).
269: */
270: static
271: tbhresdecode(tc, cp, tbpos)
272: struct tbconf *tc;
273: register char *cp;
274: register struct tbpos *tbpos;
275: {
276: char byte;
277:
278: byte = *cp++;
279: tbpos->xpos = (byte & 03) << 14;
280: tbpos->xpos |= *cp++ << 7;
281: tbpos->xpos |= *cp++;
282: tbpos->ypos = *cp++ << 14;
283: tbpos->ypos |= *cp++ << 7;
284: tbpos->ypos |= *cp++;
285: tbpos->status = (byte >> 2) | TBINPROX;
286: if (tc->tbc_flags&TBF_INPROX && tbpos->status&020)
287: tbpos->status &= ~(020|TBINPROX);
288: tbpos->scount++;
289: }
290:
291: /*
292: * Polhemus decode.
293: */
294: static
295: poldecode(tc, cp, polpos)
296: struct tbconf *tc;
297: register char *cp;
298: register struct polpos *polpos;
299: {
300:
301: polpos->p_x = cp[4] | cp[3]<<7 | (cp[9] & 0x03) << 14;
302: polpos->p_y = cp[6] | cp[5]<<7 | (cp[9] & 0x0c) << 12;
303: polpos->p_z = cp[8] | cp[7]<<7 | (cp[9] & 0x30) << 10;
304: polpos->p_azi = cp[11] | cp[10]<<7 | (cp[16] & 0x03) << 14;
305: polpos->p_pit = cp[13] | cp[12]<<7 | (cp[16] & 0x0c) << 12;
306: polpos->p_rol = cp[15] | cp[14]<<7 | (cp[16] & 0x30) << 10;
307: polpos->p_stat = cp[1] | cp[0]<<7;
308: if (cp[2] != ' ')
309: polpos->p_key = cp[2];
310: }
311:
312: /*ARGSUSED*/
313: tbioctl(tp, cmd, data, flag)
314: struct tty *tp;
315: caddr_t data;
316: {
317: register struct tb *tbp = (struct tb *)tp->T_LINEP;
318:
319: switch (cmd) {
320:
321: case BIOGMODE:
322: *(int *)data = tbp->tbflags & TBMODE;
323: break;
324:
325: case BIOSTYPE:
326: if (tbconf[*(int *)data & TBTYPE].tbc_recsize == 0 ||
327: tbconf[*(int *)data & TBTYPE].tbc_decode == 0)
328: return (EINVAL);
329: tbp->tbflags &= ~TBTYPE;
330: tbp->tbflags |= *(int *)data & TBTYPE;
331: /* fall thru... to set mode bits */
332:
333: case BIOSMODE: {
334: register struct tbconf *tc;
335:
336: tbp->tbflags &= ~TBMODE;
337: tbp->tbflags |= *(int *)data & TBMODE;
338: tc = &tbconf[tbp->tbflags & TBTYPE];
339: if (tbp->tbflags&TBSTOP) {
340: if (tc->tbc_stop)
341: ttyout(tc->tbc_stop, tp);
342: } else if (tc->tbc_start)
343: ttyout(tc->tbc_start, tp);
344: if (tbp->tbflags&TBPOINT) {
345: if (tc->tbc_point)
346: ttyout(tc->tbc_point, tp);
347: } else if (tc->tbc_run)
348: ttyout(tc->tbc_run, tp);
349: ttstart(tp);
350: break;
351: }
352:
353: case BIOGTYPE:
354: *(int *)data = tbp->tbflags & TBTYPE;
355: break;
356:
357: case TIOCSETD:
358: case TIOCGETD:
359: case TIOCGETP:
360: case TIOCGETC:
361: return (-1); /* pass thru... */
362:
363: default:
364: return (ENOTTY);
365: }
366: return (0);
367: }
368: #endif
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