usr/src/sys/hp300/stand/ct.c

/*
 * Copyright (c) 1982, 1990 The Regents of the University of California.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *      This product includes software developed by the University of
 *      California, Berkeley and its contributors.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 *      @(#)ct.c        7.3 (Berkeley) 5/5/91
 */

/*
 * CS80 tape driver
 */
#include <sys/param.h>
#include "../dev/ctreg.h"

#include "saio.h"
#include "samachdep.h"

struct  ct_iocmd ct_ioc;
struct  ct_rscmd ct_rsc;
struct  ct_stat ct_stat;
struct  ct_ssmcmd ct_ssmc;

struct  ct_softc {
        char    sc_retry;
        char    sc_alive;
        short   sc_punit;
        int     sc_blkno;
} ct_softc[NCT];

#define CTRETRY         5
#define MTFSF           10
#define MTREW           11

struct  ctinfo {
        short   hwid;
        short   punit;
} ctinfo[] = {
        CT7946ID,       1,
        CT7912PID,      1,
        CT7914PID,      1,
        CT9144ID,       0,
        CT9145ID,       0,
};
int     nctinfo = sizeof(ctinfo) / sizeof(ctinfo[0]);

ctinit(unit)
        register int unit;
{
        register struct ct_softc *rs = &ct_softc[unit];
        u_char stat;
        register int type;

        if (hpibrecv(unit, C_QSTAT, &stat, 1) != 1 || stat)
                return (0);
        if (ctident(unit) < 0)
                return (0);
        ct_ssmc.unit = C_SUNIT(rs->sc_punit);
        ct_ssmc.cmd = C_SSM;
        ct_ssmc.fefm = FEF_MASK;
        ct_ssmc.refm = REF_MASK;
        ct_ssmc.aefm = AEF_MASK;
        ct_ssmc.iefm = IEF_MASK;
        hpibsend(unit, C_CMD, &ct_ssmc, sizeof(ct_ssmc));
        hpibswait(unit);
        hpibrecv(unit, C_QSTAT, &stat, 1);
        rs->sc_alive = 1;
        return (1);
}

ctident(unit)
        int unit;
{
        struct ct_describe desc;
        u_char stat, cmd[3];
        char name[7];
        int id, i;

        id = hpibid(unit);
        if ((id & 0x200) == 0)
                return(-1);
        for (i = 0; i < nctinfo; i++)
                if (id == ctinfo[i].hwid)
                        break;
        if (i == nctinfo)
                return(-1);
        ct_softc[unit].sc_punit = ctinfo[i].punit;
        id = i;

        /*
         * Collect device description.
         * Right now we only need this to differentiate 7945 from 7946.
         * Note that we always issue the describe command to unit 0.
         */
        cmd[0] = C_SUNIT(0);
        cmd[1] = C_SVOL(0);
        cmd[2] = C_DESC;
        hpibsend(unit, C_CMD, cmd, sizeof(cmd));
        hpibrecv(unit, C_EXEC, &desc, 37);
        hpibrecv(unit, C_QSTAT, &stat, sizeof(stat));
        bzero(name, sizeof(name));
        if (!stat) {
                register int n = desc.d_name;
                for (i = 5; i >= 0; i--) {
                        name[i] = (n & 0xf) + '0';
                        n >>= 4;
                }
        }
        switch (ctinfo[id].hwid) {
        case CT7946ID:
                if (bcmp(name, "079450", 6) == 0)
                        id = -1;                /* not really a 7946 */
                break;
        default:
                break;
        }
        return(id);
}

ctopen(io)
        struct iob *io;
{
        register int unit = io->i_unit;
        register struct ct_softc *rs = &ct_softc[unit];
        register int skip;

        if (hpibalive(unit) == 0)
                _stop("ct controller not configured");
        if (rs->sc_alive == 0)
                if (ctinit(unit) == 0)
                        _stop("ct init failed");
        ctstrategy(io, MTREW);
        skip = io->i_boff;
        while (skip--)
                ctstrategy(io, MTFSF);
}

ctclose(io)
        struct iob *io;
{
        ctstrategy(io, MTREW);
}

ctstrategy(io, func)
        register struct iob *io;
        register int func;
{
        register int unit = io->i_unit;
        register struct ct_softc *rs = &ct_softc[unit];
        char stat;

        rs->sc_retry = 0;
        ct_ioc.unit = C_SUNIT(rs->sc_punit);
        ct_ioc.saddr = C_SADDR;
        ct_ioc.nop2 = C_NOP;
        ct_ioc.slen = C_SLEN;
        ct_ioc.nop3 = C_NOP;
top:
        if (func == F_READ) {
                ct_ioc.cmd = C_READ;
                ct_ioc.addr = rs->sc_blkno;
                ct_ioc.len = io->i_cc;
        }
        else if (func == F_WRITE) {
                ct_ioc.cmd = C_WRITE;
                ct_ioc.addr = rs->sc_blkno;
                ct_ioc.len = io->i_cc;
        }
        else if (func == MTFSF) {
                ct_ioc.cmd = C_READ;
                ct_ioc.addr = rs->sc_blkno;
                ct_ioc.len = io->i_cc = MAXBSIZE;
                io->i_ma = io->i_buf;
        }
        else {
                ct_ioc.cmd = C_READ;
                ct_ioc.addr = 0;
                ct_ioc.len = 0;
                rs->sc_blkno = 0;
                io->i_cc = 0;
        }
retry:
        hpibsend(unit, C_CMD, &ct_ioc, sizeof(ct_ioc));
        if (func != MTREW) {
                hpibswait(unit);
                hpibgo(unit, C_EXEC, io->i_ma, io->i_cc,
                        func != F_WRITE ? F_READ : F_WRITE);
                hpibswait(unit);
        }
        else {
                while (hpibswait(unit) < 0)
                        ;
        }
        hpibrecv(unit, C_QSTAT, &stat, 1);
        if (stat) {
                stat = cterror(unit);
                if (stat == 0)
                        return (-1);
                if (stat == 2)
                        return (0);
                if (++rs->sc_retry > CTRETRY)
                        return (-1);
                else
                        goto retry;
        }
        rs->sc_blkno += CTBTOK(io->i_cc);
        if (func == MTFSF)
                goto top;
        return (io->i_cc);
}

cterror(unit)
        register int unit;
{
        register struct ct_softc *ct = &ct_softc[unit];
        char stat;

        ct_rsc.unit = C_SUNIT(ct->sc_punit);
        ct_rsc.cmd = C_STATUS;
        hpibsend(unit, C_CMD, &ct_rsc, sizeof(ct_rsc));
        hpibrecv(unit, C_EXEC, &ct_stat, sizeof(ct_stat));
        hpibrecv(unit, C_QSTAT, &stat, 1);
        if (stat) {
                printf("ct%d: request status fail %d\n", unit, stat);
                return(0);
        }
        if (ct_stat.c_aef & AEF_EOF) {
                /* 9145 drives don't increment block number at EOF */
                if ((ct_stat.c_blk - ct->sc_blkno) == 0)
                        ct->sc_blkno++;
                else
                        ct->sc_blkno = ct_stat.c_blk;
                return (2);
        }
        printf("ct%d err: vu 0x%x, pend 0x%x, bn%d", unit,
                ct_stat.c_vu, ct_stat.c_pend, ct_stat.c_blk);
        printf(", R 0x%x F 0x%x A 0x%x I 0x%x\n", ct_stat.c_ref,
                ct_stat.c_fef, ct_stat.c_aef, ct_stat.c_ief);
        return (1);
}