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Annotation of 43BSDReno/sys/hpstand/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 is only permitted until one year after the first shipment
        !             6:  * of 4.4BSD by the Regents.  Otherwise, redistribution and use in source and
        !             7:  * binary forms are permitted provided that: (1) source distributions retain
        !             8:  * this entire copyright notice and comment, and (2) distributions including
        !             9:  * binaries display the following acknowledgement:  This product includes
        !            10:  * software developed by the University of California, Berkeley and its
        !            11:  * contributors'' in the documentation or other materials provided with the
        !            12:  * distribution and in all advertising materials mentioning features or use
        !            13:  * of this software.  Neither the name of the University nor the names of
        !            14:  * its contributors may be used to endorse or promote products derived from
        !            15:  * this software without specific prior written permission.
        !            16:  * THIS SOFTWARE IS PROVIDED AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
        !            17:  * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
        !            18:  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
        !            19:  *
        !            20:  *     @(#)ct.c        7.1 (Berkeley) 5/8/90
        !            21:  */
        !            22: 
        !            23: /*
        !            24:  * CS80 tape driver
        !            25:  */
        !            26: #include "../sys/types.h"
        !            27: #include "../hpdev/ctreg.h"
        !            28: 
        !            29: #include "saio.h"
        !            30: #include "samachdep.h"
        !            31: 
        !            32: struct ct_iocmd ct_ioc;
        !            33: struct ct_rscmd ct_rsc;
        !            34: struct ct_stat ct_stat;
        !            35: struct ct_ssmcmd ct_ssmc;
        !            36: 
        !            37: struct ct_softc {
        !            38:        char    sc_retry;
        !            39:        char    sc_alive;
        !            40:        short   sc_punit;
        !            41:        int     sc_blkno;
        !            42: } ct_softc[NCT];
        !            43: 
        !            44: #define        CTRETRY         5
        !            45: #define        MTFSF           10
        !            46: #define        MTREW           11
        !            47: 
        !            48: struct ctinfo {
        !            49:        short   hwid;
        !            50:        short   punit;
        !            51: } ctinfo[] = {
        !            52:        CT7946ID,       1,
        !            53:        CT7912PID,      1,
        !            54:        CT7914PID,      1,
        !            55:        CT9144ID,       0,
        !            56:        CT9145ID,       0,
        !            57: };
        !            58: int    nctinfo = sizeof(ctinfo) / sizeof(ctinfo[0]);
        !            59: 
        !            60: ctinit(unit)
        !            61:        register int unit;
        !            62: {
        !            63:        register struct ct_softc *rs = &ct_softc[unit];
        !            64:        u_char stat;
        !            65:        register int type;
        !            66: 
        !            67:        if (hpibrecv(unit, C_QSTAT, &stat, 1) != 1 || stat)
        !            68:                return (0);
        !            69:        if (ctident(unit) < 0)
        !            70:                return (0);
        !            71:        ct_ssmc.unit = C_SUNIT(rs->sc_punit);
        !            72:        ct_ssmc.cmd = C_SSM;
        !            73:        ct_ssmc.fefm = FEF_MASK;
        !            74:        ct_ssmc.refm = REF_MASK;
        !            75:        ct_ssmc.aefm = AEF_MASK;
        !            76:        ct_ssmc.iefm = IEF_MASK;
        !            77:        hpibsend(unit, C_CMD, &ct_ssmc, sizeof(ct_ssmc));
        !            78:        hpibswait(unit);
        !            79:        hpibrecv(unit, C_QSTAT, &stat, 1);
        !            80:        rs->sc_alive = 1;
        !            81:        return (1);
        !            82: }
        !            83: 
        !            84: ctident(unit)
        !            85:        int unit;
        !            86: {
        !            87:        struct ct_describe desc;
        !            88:        u_char stat, cmd[3];
        !            89:        char name[7];
        !            90:        int id, i;
        !            91: 
        !            92:        id = hpibid(unit);
        !            93:        if ((id & 0x200) == 0)
        !            94:                return(-1);
        !            95:        for (i = 0; i < nctinfo; i++)
        !            96:                if (id == ctinfo[i].hwid)
        !            97:                        break;
        !            98:        if (i == nctinfo)
        !            99:                return(-1);
        !           100:        ct_softc[unit].sc_punit = ctinfo[i].punit;
        !           101:        id = i;
        !           102: 
        !           103:        /*
        !           104:         * Collect device description.
        !           105:         * Right now we only need this to differentiate 7945 from 7946.
        !           106:         * Note that we always issue the describe command to unit 0.
        !           107:         */
        !           108:        cmd[0] = C_SUNIT(0);
        !           109:        cmd[1] = C_SVOL(0);
        !           110:        cmd[2] = C_DESC;
        !           111:        hpibsend(unit, C_CMD, cmd, sizeof(cmd));
        !           112:        hpibrecv(unit, C_EXEC, &desc, 37);
        !           113:        hpibrecv(unit, C_QSTAT, &stat, sizeof(stat));
        !           114:        bzero(name, sizeof(name));
        !           115:        if (!stat) {
        !           116:                register int n = desc.d_name;
        !           117:                for (i = 5; i >= 0; i--) {
        !           118:                        name[i] = (n & 0xf) + '0';
        !           119:                        n >>= 4;
        !           120:                }
        !           121:        }
        !           122:        switch (ctinfo[id].hwid) {
        !           123:        case CT7946ID:
        !           124:                if (bcmp(name, "079450", 6) == 0)
        !           125:                        id = -1;                /* not really a 7946 */
        !           126:                break;
        !           127:        default:
        !           128:                break;
        !           129:        }
        !           130:        return(id);
        !           131: }
        !           132: 
        !           133: ctopen(io)
        !           134:        struct iob *io;
        !           135: {
        !           136:        register int unit = io->i_unit;
        !           137:        register struct ct_softc *rs = &ct_softc[unit];
        !           138:        register int skip;
        !           139: 
        !           140:        if (hpibalive(unit) == 0)
        !           141:                _stop("ct controller not configured");
        !           142:        if (rs->sc_alive == 0)
        !           143:                if (ctinit(unit) == 0)
        !           144:                        _stop("ct init failed");
        !           145:        ctstrategy(io, MTREW);
        !           146:        skip = io->i_boff;
        !           147:        while (skip--)
        !           148:                ctstrategy(io, MTFSF);
        !           149: }
        !           150: 
        !           151: ctclose(io)
        !           152:        struct iob *io;
        !           153: {
        !           154:        ctstrategy(io, MTREW);
        !           155: }
        !           156: 
        !           157: ctstrategy(io, func)
        !           158:        register struct iob *io;
        !           159:        register int func;
        !           160: {
        !           161:        register int unit = io->i_unit;
        !           162:        register struct ct_softc *rs = &ct_softc[unit];
        !           163:        char stat;
        !           164: 
        !           165:        rs->sc_retry = 0;
        !           166:        ct_ioc.unit = C_SUNIT(rs->sc_punit);
        !           167:        ct_ioc.saddr = C_SADDR;
        !           168:        ct_ioc.nop2 = C_NOP;
        !           169:        ct_ioc.slen = C_SLEN;
        !           170:        ct_ioc.nop3 = C_NOP;
        !           171: top:
        !           172:        if (func == READ) {
        !           173:                ct_ioc.cmd = C_READ;
        !           174:                ct_ioc.addr = rs->sc_blkno;
        !           175:                ct_ioc.len = io->i_cc;
        !           176:        }
        !           177:        else if (func == WRITE) {
        !           178:                ct_ioc.cmd = C_WRITE;
        !           179:                ct_ioc.addr = rs->sc_blkno;
        !           180:                ct_ioc.len = io->i_cc;
        !           181:        }
        !           182:        else if (func == MTFSF) {
        !           183:                ct_ioc.cmd = C_READ;
        !           184:                ct_ioc.addr = rs->sc_blkno;
        !           185:                ct_ioc.len = io->i_cc = MAXBSIZE;
        !           186:                io->i_ma = io->i_buf;
        !           187:        }
        !           188:        else {
        !           189:                ct_ioc.cmd = C_READ;
        !           190:                ct_ioc.addr = 0;
        !           191:                ct_ioc.len = 0;
        !           192:                rs->sc_blkno = 0;
        !           193:                io->i_cc = 0;
        !           194:        }
        !           195: retry:
        !           196:        hpibsend(unit, C_CMD, &ct_ioc, sizeof(ct_ioc));
        !           197:        if (func != MTREW) {
        !           198:                hpibswait(unit);
        !           199:                hpibgo(unit, C_EXEC, io->i_ma, io->i_cc,
        !           200:                        func != WRITE ? READ : WRITE);
        !           201:                hpibswait(unit);
        !           202:        }
        !           203:        else {
        !           204:                while (hpibswait(unit) < 0)
        !           205:                        ;
        !           206:        }
        !           207:        hpibrecv(unit, C_QSTAT, &stat, 1);
        !           208:        if (stat) {
        !           209:                stat = cterror(unit);
        !           210:                if (stat == 0)
        !           211:                        return (-1);
        !           212:                if (stat == 2)
        !           213:                        return (0);
        !           214:                if (++rs->sc_retry > CTRETRY)
        !           215:                        return (-1);
        !           216:                else
        !           217:                        goto retry;
        !           218:        }
        !           219:        rs->sc_blkno += CTBTOK(io->i_cc);
        !           220:        if (func == MTFSF)
        !           221:                goto top;
        !           222:        return (io->i_cc);
        !           223: }
        !           224: 
        !           225: cterror(unit)
        !           226:        register int unit;
        !           227: {
        !           228:        register struct ct_softc *ct = &ct_softc[unit];
        !           229:        char stat;
        !           230: 
        !           231:        ct_rsc.unit = C_SUNIT(ct->sc_punit);
        !           232:        ct_rsc.cmd = C_STATUS;
        !           233:        hpibsend(unit, C_CMD, &ct_rsc, sizeof(ct_rsc));
        !           234:        hpibrecv(unit, C_EXEC, &ct_stat, sizeof(ct_stat));
        !           235:        hpibrecv(unit, C_QSTAT, &stat, 1);
        !           236:        if (stat) {
        !           237:                printf("ct%d: request status fail %d\n", unit, stat);
        !           238:                return(0);
        !           239:        }
        !           240:        if (ct_stat.c_aef & AEF_EOF) {
        !           241:                /* 9145 drives don't increment block number at EOF */
        !           242:                if ((ct_stat.c_blk - ct->sc_blkno) == 0)
        !           243:                        ct->sc_blkno++;
        !           244:                else
        !           245:                        ct->sc_blkno = ct_stat.c_blk;
        !           246:                return (2);
        !           247:        }
        !           248:        printf("ct%d err: vu 0x%x, pend 0x%x, bn%d", unit,
        !           249:                ct_stat.c_vu, ct_stat.c_pend, ct_stat.c_blk);
        !           250:        printf(", R 0x%x F 0x%x A 0x%x I 0x%x\n", ct_stat.c_ref,
        !           251:                ct_stat.c_fef, ct_stat.c_aef, ct_stat.c_ief);
        !           252:        return (1);
        !           253: }

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