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Annotation of 43BSDReno/sys/kern/tty_tb.c, revision 1.1

1.1     ! root        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    7.5 (Berkeley) 5/9/89
        !             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 "user.h"
        !            18: #include "tablet.h"
        !            19: #include "tty.h"
        !            20: 
        !            21: /*
        !            22:  * Tablet configuration table.
        !            23:  */
        !            24: struct tbconf {
        !            25:        short   tbc_recsize;    /* input record size in bytes */
        !            26:        short   tbc_uiosize;    /* size of data record returned user */
        !            27:        int     tbc_sync;       /* mask for finding sync byte/bit */
        !            28:        int     (*tbc_decode)();/* decoding routine */
        !            29:        char    *tbc_run;       /* enter run mode sequence */
        !            30:        char    *tbc_point;     /* enter point mode sequence */
        !            31:        char    *tbc_stop;      /* stop sequence */
        !            32:        char    *tbc_start;     /* start/restart sequence */
        !            33:        int     tbc_flags;
        !            34: #define        TBF_POL         0x1     /* polhemus hack */
        !            35: #define        TBF_INPROX      0x2     /* tablet has proximity info */
        !            36: };
        !            37: 
        !            38: static int tbdecode(), gtcodecode(), poldecode();
        !            39: static int tblresdecode(), tbhresdecode();
        !            40: 
        !            41: struct tbconf tbconf[TBTYPE] = {
        !            42: { 0 },
        !            43: { 5, sizeof (struct tbpos), 0200, tbdecode, "6", "4" },
        !            44: { 5, sizeof (struct tbpos), 0200, tbdecode, "\1CN", "\1RT", "\2", "\4" },
        !            45: { 8, sizeof (struct gtcopos), 0200, gtcodecode },
        !            46: {17, sizeof (struct polpos), 0200, poldecode, 0, 0, "\21", "\5\22\2\23",
        !            47:   TBF_POL },
        !            48: { 5, sizeof (struct tbpos), 0100, tblresdecode, "\1CN", "\1PT", "\2", "\4",
        !            49:   TBF_INPROX },
        !            50: { 6, sizeof (struct tbpos), 0200, tbhresdecode, "\1CN", "\1PT", "\2", "\4",
        !            51:   TBF_INPROX },
        !            52: { 5, sizeof (struct tbpos), 0100, tblresdecode, "\1CL\33", "\1PT\33", 0, 0},
        !            53: { 6, sizeof (struct tbpos), 0200, tbhresdecode, "\1CL\33", "\1PT\33", 0, 0},
        !            54: };
        !            55: 
        !            56: /*
        !            57:  * Tablet state
        !            58:  */
        !            59: struct tb {
        !            60:        int     tbflags;                /* mode & type bits */
        !            61: #define        TBMAXREC        17      /* max input record size */
        !            62:        char    cbuf[TBMAXREC];         /* input buffer */
        !            63:        union {
        !            64:                struct  tbpos tbpos;
        !            65:                struct  gtcopos gtcopos;
        !            66:                struct  polpos polpos;
        !            67:        } rets;                         /* processed state */
        !            68: #define NTBS   16
        !            69: } tb[NTBS];
        !            70: 
        !            71: /*
        !            72:  * Open as tablet discipline; called on discipline change.
        !            73:  */
        !            74: /*ARGSUSED*/
        !            75: tbopen(dev, tp)
        !            76:        dev_t dev;
        !            77:        register struct tty *tp;
        !            78: {
        !            79:        register struct tb *tbp;
        !            80: 
        !            81:        if (tp->t_line == TABLDISC)
        !            82:                return (ENODEV);
        !            83:        ttywflush(tp);
        !            84:        for (tbp = tb; tbp < &tb[NTBS]; tbp++)
        !            85:                if (tbp->tbflags == 0)
        !            86:                        break;
        !            87:        if (tbp >= &tb[NTBS])
        !            88:                return (EBUSY);
        !            89:        tbp->tbflags = TBTIGER|TBPOINT;         /* default */
        !            90:        tp->t_cp = tbp->cbuf;
        !            91:        tp->t_inbuf = 0;
        !            92:        bzero((caddr_t)&tbp->rets, sizeof (tbp->rets));
        !            93:        tp->T_LINEP = (caddr_t)tbp;
        !            94:        tp->t_flags |= LITOUT;
        !            95:        return (0);
        !            96: }
        !            97: 
        !            98: /*
        !            99:  * Line discipline change or last device close.
        !           100:  */
        !           101: tbclose(tp)
        !           102:        register struct tty *tp;
        !           103: {
        !           104:        register int s;
        !           105:        int modebits = TBPOINT|TBSTOP;
        !           106: 
        !           107:        tbioctl(tp, BIOSMODE, &modebits, 0);
        !           108:        s = spltty();
        !           109:        ((struct tb *)tp->T_LINEP)->tbflags = 0;
        !           110:        tp->t_cp = 0;
        !           111:        tp->t_inbuf = 0;
        !           112:        tp->t_rawq.c_cc = 0;            /* clear queues -- paranoid */
        !           113:        tp->t_canq.c_cc = 0;
        !           114:        tp->t_line = 0;                 /* paranoid: avoid races */
        !           115:        splx(s);
        !           116: }
        !           117: 
        !           118: /*
        !           119:  * Read from a tablet line.
        !           120:  * Characters have been buffered in a buffer and decoded.
        !           121:  */
        !           122: tbread(tp, uio)
        !           123:        register struct tty *tp;
        !           124:        struct uio *uio;
        !           125: {
        !           126:        register struct tb *tbp = (struct tb *)tp->T_LINEP;
        !           127:        register struct tbconf *tc = &tbconf[tbp->tbflags & TBTYPE];
        !           128:        int ret;
        !           129: 
        !           130:        if ((tp->t_state&TS_CARR_ON) == 0)
        !           131:                return (EIO);
        !           132:        ret = uiomove(&tbp->rets, tc->tbc_uiosize, uio);
        !           133:        if (tc->tbc_flags&TBF_POL)
        !           134:                tbp->rets.polpos.p_key = ' ';
        !           135:        return (ret);
        !           136: }
        !           137: 
        !           138: /*
        !           139:  * Low level character input routine.
        !           140:  * Stuff the character in the buffer, and decode
        !           141:  * if all the chars are there.
        !           142:  *
        !           143:  * This routine could be expanded in-line in the receiver
        !           144:  * interrupt routine to make it run as fast as possible.
        !           145:  */
        !           146: tbinput(c, tp)
        !           147:        register int c;
        !           148:        register struct tty *tp;
        !           149: {
        !           150:        register struct tb *tbp = (struct tb *)tp->T_LINEP;
        !           151:        register struct tbconf *tc = &tbconf[tbp->tbflags & TBTYPE];
        !           152: 
        !           153:        if (tc->tbc_recsize == 0 || tc->tbc_decode == 0)        /* paranoid? */
        !           154:                return;
        !           155:        /*
        !           156:         * Locate sync bit/byte or reset input buffer.
        !           157:         */
        !           158:        if (c&tc->tbc_sync || tp->t_inbuf == tc->tbc_recsize) {
        !           159:                tp->t_cp = tbp->cbuf;
        !           160:                tp->t_inbuf = 0;
        !           161:        }
        !           162:        *tp->t_cp++ = c&0177;
        !           163:        /*
        !           164:         * Call decode routine only if a full record has been collected.
        !           165:         */
        !           166:        if (++tp->t_inbuf == tc->tbc_recsize)
        !           167:                (*tc->tbc_decode)(tc, tbp->cbuf, &tbp->rets);
        !           168: }
        !           169: 
        !           170: /*
        !           171:  * Decode GTCO 8 byte format (high res, tilt, and pressure).
        !           172:  */
        !           173: static
        !           174: gtcodecode(tc, cp, tbpos)
        !           175:        struct tbconf *tc;
        !           176:        register char *cp;
        !           177:        register struct gtcopos *tbpos;
        !           178: {
        !           179: 
        !           180:        tbpos->pressure = *cp >> 2;
        !           181:        tbpos->status = (tbpos->pressure > 16) | TBINPROX; /* half way down */
        !           182:        tbpos->xpos = (*cp++ & 03) << 14;
        !           183:        tbpos->xpos |= *cp++ << 7;
        !           184:        tbpos->xpos |= *cp++;
        !           185:        tbpos->ypos = (*cp++ & 03) << 14;
        !           186:        tbpos->ypos |= *cp++ << 7;
        !           187:        tbpos->ypos |= *cp++;
        !           188:        tbpos->xtilt = *cp++;
        !           189:        tbpos->ytilt = *cp++;
        !           190:        tbpos->scount++;
        !           191: }
        !           192: 
        !           193: /*
        !           194:  * Decode old Hitachi 5 byte format (low res).
        !           195:  */
        !           196: static
        !           197: tbdecode(tc, cp, tbpos)
        !           198:        struct tbconf *tc;
        !           199:        register char *cp;
        !           200:        register struct tbpos *tbpos;
        !           201: {
        !           202:        register char byte;
        !           203: 
        !           204:        byte = *cp++;
        !           205:        tbpos->status = (byte&0100) ? TBINPROX : 0;
        !           206:        byte &= ~0100;
        !           207:        if (byte > 036)
        !           208:                tbpos->status |= 1 << ((byte-040)/2);
        !           209:        tbpos->xpos = *cp++ << 7;
        !           210:        tbpos->xpos |= *cp++;
        !           211:        if (tbpos->xpos < 256)                  /* tablet wraps around at 256 */
        !           212:                tbpos->status &= ~TBINPROX;     /* make it out of proximity */
        !           213:        tbpos->ypos = *cp++ << 7;
        !           214:        tbpos->ypos |= *cp++;
        !           215:        tbpos->scount++;
        !           216: }
        !           217: 
        !           218: /*
        !           219:  * Decode new Hitach 5-byte format (low res).
        !           220:  */
        !           221: static
        !           222: tblresdecode(tc, cp, tbpos)
        !           223:        struct tbconf *tc;
        !           224:        register char *cp;
        !           225:        register struct tbpos *tbpos;
        !           226: {
        !           227: 
        !           228:        *cp &= ~0100;           /* mask sync bit */
        !           229:        tbpos->status = (*cp++ >> 2) | TBINPROX;
        !           230:        if (tc->tbc_flags&TBF_INPROX && tbpos->status&020)
        !           231:                tbpos->status &= ~(020|TBINPROX);
        !           232:        tbpos->xpos = *cp++;
        !           233:        tbpos->xpos |= *cp++ << 6;
        !           234:        tbpos->ypos = *cp++;
        !           235:        tbpos->ypos |= *cp++ << 6;
        !           236:        tbpos->scount++;
        !           237: }
        !           238: 
        !           239: /*
        !           240:  * Decode new Hitach 6-byte format (high res).
        !           241:  */
        !           242: static
        !           243: tbhresdecode(tc, cp, tbpos)
        !           244:        struct tbconf *tc;
        !           245:        register char *cp;
        !           246:        register struct tbpos *tbpos;
        !           247: {
        !           248:        char byte;
        !           249: 
        !           250:        byte = *cp++;
        !           251:        tbpos->xpos = (byte & 03) << 14;
        !           252:        tbpos->xpos |= *cp++ << 7;
        !           253:        tbpos->xpos |= *cp++;
        !           254:        tbpos->ypos = *cp++ << 14;
        !           255:        tbpos->ypos |= *cp++ << 7;
        !           256:        tbpos->ypos |= *cp++;
        !           257:        tbpos->status = (byte >> 2) | TBINPROX;
        !           258:        if (tc->tbc_flags&TBF_INPROX && tbpos->status&020)
        !           259:                tbpos->status &= ~(020|TBINPROX);
        !           260:        tbpos->scount++;
        !           261: }
        !           262: 
        !           263: /*
        !           264:  * Polhemus decode.
        !           265:  */
        !           266: static
        !           267: poldecode(tc, cp, polpos)
        !           268:        struct tbconf *tc;
        !           269:        register char *cp;
        !           270:        register struct polpos *polpos;
        !           271: {
        !           272: 
        !           273:        polpos->p_x = cp[4] | cp[3]<<7 | (cp[9] & 0x03) << 14;
        !           274:        polpos->p_y = cp[6] | cp[5]<<7 | (cp[9] & 0x0c) << 12;
        !           275:        polpos->p_z = cp[8] | cp[7]<<7 | (cp[9] & 0x30) << 10;
        !           276:        polpos->p_azi = cp[11] | cp[10]<<7 | (cp[16] & 0x03) << 14;
        !           277:        polpos->p_pit = cp[13] | cp[12]<<7 | (cp[16] & 0x0c) << 12;
        !           278:        polpos->p_rol = cp[15] | cp[14]<<7 | (cp[16] & 0x30) << 10;
        !           279:        polpos->p_stat = cp[1] | cp[0]<<7;
        !           280:        if (cp[2] != ' ')
        !           281:                polpos->p_key = cp[2];
        !           282: }
        !           283: 
        !           284: /*ARGSUSED*/
        !           285: tbioctl(tp, cmd, data, flag)
        !           286:        struct tty *tp;
        !           287:        caddr_t data;
        !           288: {
        !           289:        register struct tb *tbp = (struct tb *)tp->T_LINEP;
        !           290: 
        !           291:        switch (cmd) {
        !           292: 
        !           293:        case BIOGMODE:
        !           294:                *(int *)data = tbp->tbflags & TBMODE;
        !           295:                break;
        !           296: 
        !           297:        case BIOSTYPE:
        !           298:                if (tbconf[*(int *)data & TBTYPE].tbc_recsize == 0 ||
        !           299:                    tbconf[*(int *)data & TBTYPE].tbc_decode == 0)
        !           300:                        return (EINVAL);
        !           301:                tbp->tbflags &= ~TBTYPE;
        !           302:                tbp->tbflags |= *(int *)data & TBTYPE;
        !           303:                /* fall thru... to set mode bits */
        !           304: 
        !           305:        case BIOSMODE: {
        !           306:                register struct tbconf *tc;
        !           307: 
        !           308:                tbp->tbflags &= ~TBMODE;
        !           309:                tbp->tbflags |= *(int *)data & TBMODE;
        !           310:                tc = &tbconf[tbp->tbflags & TBTYPE];
        !           311:                if (tbp->tbflags&TBSTOP) {
        !           312:                        if (tc->tbc_stop)
        !           313:                                ttyout(tc->tbc_stop, tp);
        !           314:                } else if (tc->tbc_start)
        !           315:                        ttyout(tc->tbc_start, tp);
        !           316:                if (tbp->tbflags&TBPOINT) {
        !           317:                        if (tc->tbc_point)
        !           318:                                ttyout(tc->tbc_point, tp);
        !           319:                } else if (tc->tbc_run)
        !           320:                        ttyout(tc->tbc_run, tp);
        !           321:                ttstart(tp);
        !           322:                break;
        !           323:        }
        !           324: 
        !           325:        case BIOGTYPE:
        !           326:                *(int *)data = tbp->tbflags & TBTYPE;
        !           327:                break;
        !           328: 
        !           329:        case TIOCSETD:
        !           330:        case TIOCGETD:
        !           331:        case TIOCGETP:
        !           332:        case TIOCGETC:
        !           333:                return (-1);            /* pass thru... */
        !           334: 
        !           335:        default:
        !           336:                return (ENOTTY);
        !           337:        }
        !           338:        return (0);
        !           339: }
        !           340: #endif

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