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Annotation of Net2/arch/hp300/stand/ct.c, revision 1.1

1.1     ! root        1: /*
        !             2:  * Copyright (c) 1982, 1990 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:  *     @(#)ct.c        7.3 (Berkeley) 5/5/91
        !            34:  */
        !            35: 
        !            36: /*
        !            37:  * CS80 tape driver
        !            38:  */
        !            39: #include <sys/param.h>
        !            40: #include "../dev/ctreg.h"
        !            41: 
        !            42: #include "saio.h"
        !            43: #include "samachdep.h"
        !            44: 
        !            45: struct ct_iocmd ct_ioc;
        !            46: struct ct_rscmd ct_rsc;
        !            47: struct ct_stat ct_stat;
        !            48: struct ct_ssmcmd ct_ssmc;
        !            49: 
        !            50: struct ct_softc {
        !            51:        char    sc_retry;
        !            52:        char    sc_alive;
        !            53:        short   sc_punit;
        !            54:        int     sc_blkno;
        !            55: } ct_softc[NCT];
        !            56: 
        !            57: #define        CTRETRY         5
        !            58: #define        MTFSF           10
        !            59: #define        MTREW           11
        !            60: 
        !            61: struct ctinfo {
        !            62:        short   hwid;
        !            63:        short   punit;
        !            64: } ctinfo[] = {
        !            65:        CT7946ID,       1,
        !            66:        CT7912PID,      1,
        !            67:        CT7914PID,      1,
        !            68:        CT9144ID,       0,
        !            69:        CT9145ID,       0,
        !            70: };
        !            71: int    nctinfo = sizeof(ctinfo) / sizeof(ctinfo[0]);
        !            72: 
        !            73: ctinit(unit)
        !            74:        register int unit;
        !            75: {
        !            76:        register struct ct_softc *rs = &ct_softc[unit];
        !            77:        u_char stat;
        !            78:        register int type;
        !            79: 
        !            80:        if (hpibrecv(unit, C_QSTAT, &stat, 1) != 1 || stat)
        !            81:                return (0);
        !            82:        if (ctident(unit) < 0)
        !            83:                return (0);
        !            84:        ct_ssmc.unit = C_SUNIT(rs->sc_punit);
        !            85:        ct_ssmc.cmd = C_SSM;
        !            86:        ct_ssmc.fefm = FEF_MASK;
        !            87:        ct_ssmc.refm = REF_MASK;
        !            88:        ct_ssmc.aefm = AEF_MASK;
        !            89:        ct_ssmc.iefm = IEF_MASK;
        !            90:        hpibsend(unit, C_CMD, &ct_ssmc, sizeof(ct_ssmc));
        !            91:        hpibswait(unit);
        !            92:        hpibrecv(unit, C_QSTAT, &stat, 1);
        !            93:        rs->sc_alive = 1;
        !            94:        return (1);
        !            95: }
        !            96: 
        !            97: ctident(unit)
        !            98:        int unit;
        !            99: {
        !           100:        struct ct_describe desc;
        !           101:        u_char stat, cmd[3];
        !           102:        char name[7];
        !           103:        int id, i;
        !           104: 
        !           105:        id = hpibid(unit);
        !           106:        if ((id & 0x200) == 0)
        !           107:                return(-1);
        !           108:        for (i = 0; i < nctinfo; i++)
        !           109:                if (id == ctinfo[i].hwid)
        !           110:                        break;
        !           111:        if (i == nctinfo)
        !           112:                return(-1);
        !           113:        ct_softc[unit].sc_punit = ctinfo[i].punit;
        !           114:        id = i;
        !           115: 
        !           116:        /*
        !           117:         * Collect device description.
        !           118:         * Right now we only need this to differentiate 7945 from 7946.
        !           119:         * Note that we always issue the describe command to unit 0.
        !           120:         */
        !           121:        cmd[0] = C_SUNIT(0);
        !           122:        cmd[1] = C_SVOL(0);
        !           123:        cmd[2] = C_DESC;
        !           124:        hpibsend(unit, C_CMD, cmd, sizeof(cmd));
        !           125:        hpibrecv(unit, C_EXEC, &desc, 37);
        !           126:        hpibrecv(unit, C_QSTAT, &stat, sizeof(stat));
        !           127:        bzero(name, sizeof(name));
        !           128:        if (!stat) {
        !           129:                register int n = desc.d_name;
        !           130:                for (i = 5; i >= 0; i--) {
        !           131:                        name[i] = (n & 0xf) + '0';
        !           132:                        n >>= 4;
        !           133:                }
        !           134:        }
        !           135:        switch (ctinfo[id].hwid) {
        !           136:        case CT7946ID:
        !           137:                if (bcmp(name, "079450", 6) == 0)
        !           138:                        id = -1;                /* not really a 7946 */
        !           139:                break;
        !           140:        default:
        !           141:                break;
        !           142:        }
        !           143:        return(id);
        !           144: }
        !           145: 
        !           146: ctopen(io)
        !           147:        struct iob *io;
        !           148: {
        !           149:        register int unit = io->i_unit;
        !           150:        register struct ct_softc *rs = &ct_softc[unit];
        !           151:        register int skip;
        !           152: 
        !           153:        if (hpibalive(unit) == 0)
        !           154:                _stop("ct controller not configured");
        !           155:        if (rs->sc_alive == 0)
        !           156:                if (ctinit(unit) == 0)
        !           157:                        _stop("ct init failed");
        !           158:        ctstrategy(io, MTREW);
        !           159:        skip = io->i_boff;
        !           160:        while (skip--)
        !           161:                ctstrategy(io, MTFSF);
        !           162: }
        !           163: 
        !           164: ctclose(io)
        !           165:        struct iob *io;
        !           166: {
        !           167:        ctstrategy(io, MTREW);
        !           168: }
        !           169: 
        !           170: ctstrategy(io, func)
        !           171:        register struct iob *io;
        !           172:        register int func;
        !           173: {
        !           174:        register int unit = io->i_unit;
        !           175:        register struct ct_softc *rs = &ct_softc[unit];
        !           176:        char stat;
        !           177: 
        !           178:        rs->sc_retry = 0;
        !           179:        ct_ioc.unit = C_SUNIT(rs->sc_punit);
        !           180:        ct_ioc.saddr = C_SADDR;
        !           181:        ct_ioc.nop2 = C_NOP;
        !           182:        ct_ioc.slen = C_SLEN;
        !           183:        ct_ioc.nop3 = C_NOP;
        !           184: top:
        !           185:        if (func == F_READ) {
        !           186:                ct_ioc.cmd = C_READ;
        !           187:                ct_ioc.addr = rs->sc_blkno;
        !           188:                ct_ioc.len = io->i_cc;
        !           189:        }
        !           190:        else if (func == F_WRITE) {
        !           191:                ct_ioc.cmd = C_WRITE;
        !           192:                ct_ioc.addr = rs->sc_blkno;
        !           193:                ct_ioc.len = io->i_cc;
        !           194:        }
        !           195:        else if (func == MTFSF) {
        !           196:                ct_ioc.cmd = C_READ;
        !           197:                ct_ioc.addr = rs->sc_blkno;
        !           198:                ct_ioc.len = io->i_cc = MAXBSIZE;
        !           199:                io->i_ma = io->i_buf;
        !           200:        }
        !           201:        else {
        !           202:                ct_ioc.cmd = C_READ;
        !           203:                ct_ioc.addr = 0;
        !           204:                ct_ioc.len = 0;
        !           205:                rs->sc_blkno = 0;
        !           206:                io->i_cc = 0;
        !           207:        }
        !           208: retry:
        !           209:        hpibsend(unit, C_CMD, &ct_ioc, sizeof(ct_ioc));
        !           210:        if (func != MTREW) {
        !           211:                hpibswait(unit);
        !           212:                hpibgo(unit, C_EXEC, io->i_ma, io->i_cc,
        !           213:                        func != F_WRITE ? F_READ : F_WRITE);
        !           214:                hpibswait(unit);
        !           215:        }
        !           216:        else {
        !           217:                while (hpibswait(unit) < 0)
        !           218:                        ;
        !           219:        }
        !           220:        hpibrecv(unit, C_QSTAT, &stat, 1);
        !           221:        if (stat) {
        !           222:                stat = cterror(unit);
        !           223:                if (stat == 0)
        !           224:                        return (-1);
        !           225:                if (stat == 2)
        !           226:                        return (0);
        !           227:                if (++rs->sc_retry > CTRETRY)
        !           228:                        return (-1);
        !           229:                else
        !           230:                        goto retry;
        !           231:        }
        !           232:        rs->sc_blkno += CTBTOK(io->i_cc);
        !           233:        if (func == MTFSF)
        !           234:                goto top;
        !           235:        return (io->i_cc);
        !           236: }
        !           237: 
        !           238: cterror(unit)
        !           239:        register int unit;
        !           240: {
        !           241:        register struct ct_softc *ct = &ct_softc[unit];
        !           242:        char stat;
        !           243: 
        !           244:        ct_rsc.unit = C_SUNIT(ct->sc_punit);
        !           245:        ct_rsc.cmd = C_STATUS;
        !           246:        hpibsend(unit, C_CMD, &ct_rsc, sizeof(ct_rsc));
        !           247:        hpibrecv(unit, C_EXEC, &ct_stat, sizeof(ct_stat));
        !           248:        hpibrecv(unit, C_QSTAT, &stat, 1);
        !           249:        if (stat) {
        !           250:                printf("ct%d: request status fail %d\n", unit, stat);
        !           251:                return(0);
        !           252:        }
        !           253:        if (ct_stat.c_aef & AEF_EOF) {
        !           254:                /* 9145 drives don't increment block number at EOF */
        !           255:                if ((ct_stat.c_blk - ct->sc_blkno) == 0)
        !           256:                        ct->sc_blkno++;
        !           257:                else
        !           258:                        ct->sc_blkno = ct_stat.c_blk;
        !           259:                return (2);
        !           260:        }
        !           261:        printf("ct%d err: vu 0x%x, pend 0x%x, bn%d", unit,
        !           262:                ct_stat.c_vu, ct_stat.c_pend, ct_stat.c_blk);
        !           263:        printf(", R 0x%x F 0x%x A 0x%x I 0x%x\n", ct_stat.c_ref,
        !           264:                ct_stat.c_fef, ct_stat.c_aef, ct_stat.c_ief);
        !           265:        return (1);
        !           266: }

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