NetBSD-5.0.2/sys/dev/gpib/ct.c
/* $NetBSD: ct.c,v 1.16 2008/06/11 18:46:24 cegger Exp $ */
/*-
* Copyright (c) 1996-2003 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Jason R. Thorpe.
*
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
*/
/*
* Copyright (c) 1982, 1990, 1993
* The Regents of the University of California. All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* the Systems Programming Group of the University of Utah Computer
* Science Department.
*
* 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. 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.
*
* from: Utah $Hdr: rd.c 1.44 92/12/26$
*
* @(#)rd.c 8.2 (Berkeley) 5/19/94
*/
/*
* Copyright (c) 1988 University of Utah.
*
* This code is derived from software contributed to Berkeley by
* the Systems Programming Group of the University of Utah Computer
* Science Department.
*
* 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.
*
* from: Utah $Hdr: rd.c 1.44 92/12/26$
*
* @(#)rd.c 8.2 (Berkeley) 5/19/94
*/
/*
* CS/80 cartridge tape driver (HP9144, HP88140, HP9145)
*
* Reminder:
* C_CC bit (character count option) when used in the CS/80 command
* 'set options' will cause the tape not to stream.
*
* TODO:
* make filesystem compatible
* make block mode work according to mtio(4) spec. (if possible)
* merge with CS/80 disk driver
* finish support of HP9145
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: ct.c,v 1.16 2008/06/11 18:46:24 cegger Exp $");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/buf.h>
#include <sys/bufq.h>
#include <sys/conf.h>
#include <sys/device.h>
#include <sys/ioctl.h>
#include <sys/mtio.h>
#include <sys/proc.h>
#include <sys/tprintf.h>
#include <dev/gpib/ctreg.h> /* XXX must be before cs80busvar.h ATM */
#include <dev/gpib/gpibvar.h>
#include <dev/gpib/cs80busvar.h>
/* number of eof marks to remember */
#define EOFS 128
#ifdef DEBUG
int ctdebug = 0xff;
#define CDB_FILES 0x01
#define CDB_BSF 0x02
#define CDB_IDENT 0x04
#define CDB_FAIL 0x08
#define CDB_FOLLOW 0x10
#define DPRINTF(mask, str) if (ctdebug & (mask)) printf str
#else
#define DPRINTF(mask, str) /* nothing */
#endif
struct ct_softc {
struct device sc_dev;
gpib_chipset_tag_t sc_ic;
gpib_handle_t sc_hdl;
int sc_slave; /* GPIB slave ID */
int sc_punit; /* physical unit */
struct ct_iocmd sc_ioc;
struct ct_rscmd sc_rsc;
struct cs80_stat sc_stat;
struct bufq_state *sc_tab;
int sc_active;
struct buf *sc_bp;
struct buf sc_bufstore; /* XXX */
int sc_blkno;
int sc_cmd;
int sc_resid;
char *sc_addr;
int sc_flags;
#define CTF_OPEN 0x01
#define CTF_ALIVE 0x02
#define CTF_WRT 0x04
#define CTF_CMD 0x08
#define CTF_IO 0x10
#define CTF_BEOF 0x20
#define CTF_AEOF 0x40
#define CTF_EOT 0x80
#define CTF_STATWAIT 0x100
#define CTF_CANSTREAM 0x200
#define CTF_WRTTN 0x400
short sc_type;
tpr_t sc_tpr;
int sc_eofp;
int sc_eofs[EOFS];
};
int ctmatch(struct device *, struct cfdata *, void *);
void ctattach(struct device *, struct device *, void *);
CFATTACH_DECL(ct, sizeof(struct ct_softc),
ctmatch, ctattach, NULL, NULL);
int ctident(struct device *, struct ct_softc *,
struct cs80bus_attach_args *);
int ctlookup(int, int, int);
void ctaddeof(struct ct_softc *);
void ctustart(struct ct_softc *);
void cteof(struct ct_softc *, struct buf *);
void ctdone(struct ct_softc *, struct buf *);
void ctcallback(void *, int);
void ctstart(struct ct_softc *);
void ctintr(struct ct_softc *);
void ctcommand(dev_t, int, int);
dev_type_open(ctopen);
dev_type_close(ctclose);
dev_type_read(ctread);
dev_type_write(ctwrite);
dev_type_ioctl(ctioctl);
dev_type_strategy(ctstrategy);
const struct bdevsw ct_bdevsw = {
ctopen, ctclose, ctstrategy, ctioctl, nodump, nosize, D_TAPE
};
const struct cdevsw ct_cdevsw = {
ctopen, ctclose, ctread, ctwrite, ctioctl,
nostop, notty, nopoll, nommap, nokqfilter, D_TAPE
};
extern struct cfdriver ct_cd;
struct ctinfo {
short hwid;
short punit;
const char *desc;
} ctinfo[] = {
{ CT7946ID, 1, "7946A" },
{ CT7912PID, 1, "7912P" },
{ CT7914PID, 1, "7914P" },
{ CT9144ID, 0, "9144" },
{ CT9145ID, 0, "9145" },
{ CT35401ID, 0, "35401A"},
};
int nctinfo = sizeof(ctinfo) / sizeof(ctinfo[0]);
#define CT_NOREW 4
#define CT_STREAM 8
#define CTUNIT(x) (minor(x) & 0x03)
int
ctlookup(id, slave, punit)
int id;
int slave;
int punit;
{
int i;
for (i = 0; i < nctinfo; i++)
if (ctinfo[i].hwid == id)
break;
if (i == nctinfo)
return (-1);
return (i);
}
int
ctmatch(parent, match, aux)
struct device *parent;
struct cfdata *match;
void *aux;
{
struct cs80bus_attach_args *ca = aux;
int i;
if ((i = ctlookup(ca->ca_id, ca->ca_slave, ca->ca_punit)) < 0)
return (0);
ca->ca_punit = ctinfo[i].punit;
return (1);
}
void
ctattach(parent, self, aux)
struct device *parent, *self;
void *aux;
{
struct ct_softc *sc = device_private(self);
struct cs80bus_attach_args *ca = aux;
struct cs80_description csd;
char name[7];
int type, i, n, canstream = 0;
sc->sc_ic = ca->ca_ic;
sc->sc_slave = ca->ca_slave;
sc->sc_punit = ca->ca_punit;
if ((type = ctlookup(ca->ca_id, ca->ca_slave, ca->ca_punit)) < 0)
return;
if (cs80reset(parent, sc->sc_slave, sc->sc_punit)) {
aprint_normal("\n");
aprint_error_dev(&sc->sc_dev, "can't reset device\n");
return;
}
if (cs80describe(parent, sc->sc_slave, sc->sc_punit, &csd)) {
aprint_normal("\n");
aprint_error_dev(&sc->sc_dev, "didn't respond to describe command\n");
return;
}
memset(name, 0, sizeof(name));
for (i=0, n=0; i<3; i++) {
name[n++] = (csd.d_name[i] >> 4) + '0';
name[n++] = (csd.d_name[i] & 0x0f) + '0';
}
#ifdef DEBUG
if (ctdebug & CDB_IDENT) {
printf("\n%s: name: ('%s')\n",
device_xname(&sc->sc_dev),name);
printf(" iuw %x, maxxfr %d, ctype %d\n",
csd.d_iuw, csd.d_cmaxxfr, csd.d_ctype);
printf(" utype %d, bps %d, blkbuf %d, burst %d, blktime %d\n",
csd.d_utype, csd.d_sectsize,
csd.d_blkbuf, csd.d_burstsize, csd.d_blocktime);
printf(" avxfr %d, ort %d, atp %d, maxint %d, fv %x, rv %x\n",
csd.d_uavexfr, csd.d_retry, csd.d_access,
csd.d_maxint, csd.d_fvbyte, csd.d_rvbyte);
printf(" maxcyl/head/sect %d/%d/%d, maxvsect %d, inter %d\n",
csd.d_maxcylhead >> 8 , csd.d_maxcylhead & 0xff,
csd.d_maxsect, csd.d_maxvsectl, csd.d_interleave);
printf("%s", device_xname(&sc->sc_dev));
}
#endif
switch (ca->ca_id) {
case CT7946ID:
if (memcmp(name, "079450", 6) == 0)
return; /* not really a 7946 */
/* fall into... */
case CT9144ID:
case CT9145ID:
case CT35401ID:
sc->sc_type = CT9144;
canstream = 1;
break;
case CT7912PID:
case CT7914PID:
sc->sc_type = CT88140;
break;
default:
sc->sc_type = type;
break;
}
sc->sc_type = type;
sc->sc_flags = canstream ? CTF_CANSTREAM : 0;
printf(": %s %stape\n", ctinfo[type].desc,
canstream ? "streaming " : "");
bufq_alloc(&sc->sc_tab, "fcfs", 0);
if (gpibregister(sc->sc_ic, sc->sc_slave, ctcallback, sc,
&sc->sc_hdl)) {
aprint_error_dev(&sc->sc_dev, "can't register callback\n");
return;
}
sc->sc_flags |= CTF_ALIVE;
}
/*ARGSUSED*/
int
ctopen(dev_t dev, int flag, int type, struct lwp *l)
{
struct ct_softc *sc;
u_int8_t opt;
sc = device_lookup_private(&ct_cd, CTUNIT(dev));
if (sc == NULL || (sc->sc_flags & CTF_ALIVE) == 0)
return (ENXIO);
if (sc->sc_flags & CTF_OPEN)
return (EBUSY);
if ((dev & CT_STREAM) && (sc->sc_flags & CTF_CANSTREAM))
opt = C_SPAR | C_IMRPT;
else
opt = C_SPAR;
if (cs80setoptions(device_parent(&sc->sc_dev), sc->sc_slave,
sc->sc_punit, opt))
return (EBUSY);
sc->sc_tpr = tprintf_open(l->l_proc);
sc->sc_flags |= CTF_OPEN;
return (0);
}
/*ARGSUSED*/
int
ctclose(dev_t dev, int flag, int fmt, struct lwp *l)
{
struct ct_softc *sc;
sc = device_lookup_private(&ct_cd, CTUNIT(dev));
if (sc == NULL)
return (ENXIO);
if ((sc->sc_flags & (CTF_WRT|CTF_WRTTN)) == (CTF_WRT|CTF_WRTTN) &&
(sc->sc_flags & CTF_EOT) == 0 ) { /* XXX return error if EOT ?? */
ctcommand(dev, MTWEOF, 2);
ctcommand(dev, MTBSR, 1);
if (sc->sc_eofp == EOFS - 1)
sc->sc_eofs[EOFS - 1]--;
else
sc->sc_eofp--;
DPRINTF(CDB_BSF, ("%s: ctclose backup eofs prt %d blk %d\n",
device_xname(&sc->sc_dev), sc->sc_eofp,
sc->sc_eofs[sc->sc_eofp]));
}
if ((minor(dev) & CT_NOREW) == 0)
ctcommand(dev, MTREW, 1);
sc->sc_flags &= ~(CTF_OPEN | CTF_WRT | CTF_WRTTN);
tprintf_close(sc->sc_tpr);
DPRINTF(CDB_FILES, ("ctclose: flags %x\n", sc->sc_flags));
return (0); /* XXX */
}
void
ctcommand(dev_t dev, int cmd, int cnt)
{
struct ct_softc *sc;
struct buf *bp;
struct buf *nbp = 0;
sc = device_lookup_private(&ct_cd, CTUNIT(dev));
bp = &sc->sc_bufstore;
DPRINTF(CDB_FOLLOW, ("ctcommand: called\n"));
if (cmd == MTBSF && sc->sc_eofp == EOFS - 1) {
cnt = sc->sc_eofs[EOFS - 1] - cnt;
ctcommand(dev, MTREW, 1);
ctcommand(dev, MTFSF, cnt);
cnt = 2;
cmd = MTBSR;
}
if (cmd == MTBSF && sc->sc_eofp - cnt < 0) {
cnt = 1;
cmd = MTREW;
}
sc->sc_flags |= CTF_CMD;
sc->sc_bp = bp;
sc->sc_cmd = cmd;
bp->b_dev = dev;
bp->b_objlock = &buffer_lock;
if (cmd == MTFSF) {
nbp = (struct buf *)geteblk(MAXBSIZE);
bp->b_data = nbp->b_data;
bp->b_bcount = MAXBSIZE;
}
while (cnt-- > 0) {
bp->b_flags = 0;
bp->b_cflags = BC_BUSY;
bp->b_oflags = 0;
if (cmd == MTBSF) {
sc->sc_blkno = sc->sc_eofs[sc->sc_eofp];
sc->sc_eofp--;
DPRINTF(CDB_BSF, ("%s: backup eof pos %d blk %d\n",
device_xname(&sc->sc_dev), sc->sc_eofp,
sc->sc_eofs[sc->sc_eofp]));
}
ctstrategy(bp);
biowait(bp);
}
bp->b_flags = 0;
sc->sc_flags &= ~CTF_CMD;
if (nbp)
brelse(nbp, 0);
}
void
ctstrategy(struct buf *bp)
{
struct ct_softc *sc;
int s;
DPRINTF(CDB_FOLLOW, ("cdstrategy(%p): dev %x, bn %x, bcount %lx, %c\n",
bp, bp->b_dev, bp->b_blkno, bp->b_bcount,
(bp->b_flags & B_READ) ? 'R' : 'W'));
sc = device_lookup_private(&ct_cd, CTUNIT(bp->b_dev));
s = splbio();
BUFQ_PUT(sc->sc_tab, bp);
if (sc->sc_active == 0) {
sc->sc_active = 1;
ctustart(sc);
}
splx(s);
}
void
ctustart(sc)
struct ct_softc *sc;
{
struct buf *bp;
bp = BUFQ_PEEK(sc->sc_tab);
sc->sc_addr = bp->b_data;
sc->sc_resid = bp->b_bcount;
if (gpibrequest(sc->sc_ic, sc->sc_hdl))
ctstart(sc);
}
void
ctstart(sc)
struct ct_softc *sc;
{
struct buf *bp;
struct ct_ulcmd ul;
struct ct_wfmcmd wfm;
int i, slave, punit;
slave = sc->sc_slave;
punit = sc->sc_punit;
bp = BUFQ_PEEK(sc->sc_tab);
if ((sc->sc_flags & CTF_CMD) && sc->sc_bp == bp) {
switch(sc->sc_cmd) {
case MTFSF:
bp->b_flags |= B_READ;
goto mustio;
case MTBSF:
goto gotaddr;
case MTOFFL:
sc->sc_blkno = 0;
ul.unit = CS80CMD_SUNIT(punit);
ul.cmd = CS80CMD_UNLOAD;
(void) cs80send(device_parent(&sc->sc_dev), slave,
punit, CS80CMD_SCMD, &ul, sizeof(ul));
break;
case MTWEOF:
sc->sc_blkno++;
sc->sc_flags |= CTF_WRT;
wfm.unit = CS80CMD_SUNIT(sc->sc_punit);
wfm.cmd = CS80CMD_WFM;
(void) cs80send(device_parent(&sc->sc_dev), slave,
punit, CS80CMD_SCMD, &wfm, sizeof(wfm));
ctaddeof(sc);
break;
case MTBSR:
sc->sc_blkno--;
goto gotaddr;
case MTFSR:
sc->sc_blkno++;
goto gotaddr;
case MTREW:
sc->sc_blkno = 0;
DPRINTF(CDB_BSF, ("%s: clearing eofs\n",
device_xname(&sc->sc_dev)));
for (i=0; i<EOFS; i++)
sc->sc_eofs[i] = 0;
sc->sc_eofp = 0;
gotaddr:
sc->sc_ioc.unit = CS80CMD_SUNIT(sc->sc_punit);
sc->sc_ioc.saddr = CS80CMD_SADDR;
sc->sc_ioc.addr0 = 0;
sc->sc_ioc.addr = htobe32(sc->sc_blkno);
sc->sc_ioc.nop2 = CS80CMD_NOP;
sc->sc_ioc.slen = CS80CMD_SLEN;
sc->sc_ioc.len = htobe32(0);
sc->sc_ioc.nop3 = CS80CMD_NOP;
sc->sc_ioc.cmd = CS80CMD_READ;
(void) cs80send(device_parent(&sc->sc_dev), slave,
punit, CS80CMD_SCMD, &sc->sc_ioc,
sizeof(sc->sc_ioc));
break;
}
} else {
mustio:
if ((bp->b_flags & B_READ) &&
sc->sc_flags & (CTF_BEOF|CTF_EOT)) {
DPRINTF(CDB_FILES, ("ctstart: before %x\n",
sc->sc_flags));
if (sc->sc_flags & CTF_BEOF) {
sc->sc_flags &= ~CTF_BEOF;
sc->sc_flags |= CTF_AEOF;
DPRINTF(CDB_FILES, ("ctstart: after %x\n",
sc->sc_flags));
}
bp->b_resid = bp->b_bcount;
ctdone(sc, bp);
return;
}
sc->sc_flags |= CTF_IO;
sc->sc_ioc.unit = CS80CMD_SUNIT(sc->sc_punit);
sc->sc_ioc.saddr = CS80CMD_SADDR;
sc->sc_ioc.addr0 = 0;
sc->sc_ioc.addr = htobe32(sc->sc_blkno);
sc->sc_ioc.nop2 = CS80CMD_NOP;
sc->sc_ioc.slen = CS80CMD_SLEN;
sc->sc_ioc.len = htobe32(sc->sc_resid);
sc->sc_ioc.nop3 = CS80CMD_NOP;
if (bp->b_flags & B_READ)
sc->sc_ioc.cmd = CS80CMD_READ;
else {
sc->sc_ioc.cmd = CS80CMD_WRITE;
sc->sc_flags |= (CTF_WRT | CTF_WRTTN);
}
(void) cs80send(device_parent(&sc->sc_dev), slave, punit,
CS80CMD_SCMD, &sc->sc_ioc, sizeof(sc->sc_ioc));
}
gpibawait(sc->sc_ic);
}
/*
* Hideous grue to handle EOF/EOT (mostly for reads)
*/
void
cteof(sc, bp)
struct ct_softc *sc;
struct buf *bp;
{
long blks;
/*
* EOT on a write is an error.
*/
if ((bp->b_flags & B_READ) == 0) {
bp->b_resid = bp->b_bcount;
bp->b_error = ENOSPC;
sc->sc_flags |= CTF_EOT;
return;
}
/*
* Use returned block position to determine how many blocks
* we really read and update b_resid.
*/
blks = sc->sc_stat.c_blk - sc->sc_blkno - 1;
DPRINTF(CDB_FILES, ("cteof: bc %ld oblk %d nblk %d read %ld, resid %ld\n",
bp->b_bcount, sc->sc_blkno, sc->sc_stat.c_blk,
blks, bp->b_bcount - CTKTOB(blks)));
if (blks == -1) { /* 9145 on EOF does not change sc_stat.c_blk */
blks = 0;
sc->sc_blkno++;
}
else {
sc->sc_blkno = sc->sc_stat.c_blk;
}
bp->b_resid = bp->b_bcount - CTKTOB(blks);
/*
* If we are at physical EOV or were after an EOF,
* we are now at logical EOT.
*/
if ((sc->sc_stat.c_aef & AEF_EOV) ||
(sc->sc_flags & CTF_AEOF)) {
sc->sc_flags |= CTF_EOT;
sc->sc_flags &= ~(CTF_AEOF|CTF_BEOF);
}
/*
* If we were before an EOF or we have just completed a FSF,
* we are now after EOF.
*/
else if ((sc->sc_flags & CTF_BEOF) ||
((sc->sc_flags & CTF_CMD) && sc->sc_cmd == MTFSF)) {
sc->sc_flags |= CTF_AEOF;
sc->sc_flags &= ~CTF_BEOF;
}
/*
* Otherwise if we read something we are now before EOF
* (and no longer after EOF).
*/
else if (blks) {
sc->sc_flags |= CTF_BEOF;
sc->sc_flags &= ~CTF_AEOF;
}
/*
* Finally, if we didn't read anything we just passed an EOF
*/
else
sc->sc_flags |= CTF_AEOF;
DPRINTF(CDB_FILES, ("cteof: leaving flags %x\n", sc->sc_flags));
}
void
ctcallback(v, action)
void *v;
int action;
{
struct ct_softc *sc = v;
DPRINTF(CDB_FOLLOW, ("ctcallback: v=%p, action=%d\n", v, action));
switch (action) {
case GPIBCBF_START:
ctstart(sc);
break;
case GPIBCBF_INTR:
ctintr(sc);
break;
#ifdef DEBUG
default:
DPRINTF(CDB_FAIL, ("ctcallback: unknown action %d\n", action));
break;
#endif
}
}
void
ctintr(sc)
struct ct_softc *sc;
{
struct buf *bp;
u_int8_t stat;
int slave, punit;
int dir;
slave = sc->sc_slave;
punit = sc->sc_punit;
bp = BUFQ_PEEK(sc->sc_tab);
if (bp == NULL) {
aprint_error_dev(&sc->sc_dev, "bp == NULL\n");
return;
}
if (sc->sc_flags & CTF_IO) {
sc->sc_flags &= ~CTF_IO;
dir = (bp->b_flags & B_READ ? GPIB_READ : GPIB_WRITE);
gpibxfer(sc->sc_ic, slave, CS80CMD_EXEC, sc->sc_addr,
sc->sc_resid, dir, dir == GPIB_READ);
return;
}
if ((sc->sc_flags & CTF_STATWAIT) == 0) {
if (gpibpptest(sc->sc_ic, slave) == 0) {
sc->sc_flags |= CTF_STATWAIT;
gpibawait(sc->sc_ic);
return;
}
} else
sc->sc_flags &= ~CTF_STATWAIT;
(void) gpibrecv(sc->sc_ic, slave, CS80CMD_QSTAT, &stat, 1);
DPRINTF(CDB_FILES, ("ctintr: before flags %x\n", sc->sc_flags));
if (stat) {
sc->sc_rsc.unit = CS80CMD_SUNIT(punit);
sc->sc_rsc.cmd = CS80CMD_STATUS;
(void) gpibsend(sc->sc_ic, slave, CS80CMD_SCMD, &sc->sc_rsc,
sizeof(sc->sc_rsc));
(void) gpibrecv(sc->sc_ic, slave, CS80CMD_EXEC, &sc->sc_stat,
sizeof(sc->sc_stat));
(void) gpibrecv(sc->sc_ic, slave, CS80CMD_QSTAT, &stat, 1);
DPRINTF(CDB_FILES, ("ctintr: return stat 0x%x, A%x F%x blk %d\n",
stat, sc->sc_stat.c_aef,
sc->sc_stat.c_fef, sc->sc_stat.c_blk));
if (stat == 0) {
if (sc->sc_stat.c_aef & (AEF_EOF | AEF_EOV)) {
cteof(sc, bp);
ctaddeof(sc);
goto done;
}
if (sc->sc_stat.c_fef & FEF_PF) {
cs80reset(sc, slave, punit);
ctstart(sc);
return;
}
if (sc->sc_stat.c_fef & FEF_REXMT) {
ctstart(sc);
return;
}
if (sc->sc_stat.c_aef & 0x5800) {
if (sc->sc_stat.c_aef & 0x4000)
tprintf(sc->sc_tpr,
"%s: uninitialized media\n",
device_xname(&sc->sc_dev));
if (sc->sc_stat.c_aef & 0x1000)
tprintf(sc->sc_tpr,
"%s: not ready\n",
device_xname(&sc->sc_dev));
if (sc->sc_stat.c_aef & 0x0800)
tprintf(sc->sc_tpr,
"%s: write protect\n",
device_xname(&sc->sc_dev));
} else {
printf("%s err: v%d u%d ru%d bn%d, ",
device_xname(&sc->sc_dev),
(sc->sc_stat.c_vu>>4)&0xF,
sc->sc_stat.c_vu&0xF,
sc->sc_stat.c_pend,
sc->sc_stat.c_blk);
printf("R0x%x F0x%x A0x%x I0x%x\n",
sc->sc_stat.c_ref,
sc->sc_stat.c_fef,
sc->sc_stat.c_aef,
sc->sc_stat.c_ief);
}
} else
aprint_error_dev(&sc->sc_dev, "request status failed\n");
bp->b_error = EIO;
goto done;
} else
bp->b_resid = 0;
if (sc->sc_flags & CTF_CMD) {
switch (sc->sc_cmd) {
case MTFSF:
sc->sc_flags &= ~(CTF_BEOF|CTF_AEOF);
sc->sc_blkno += CTBTOK(sc->sc_resid);
ctstart(sc);
return;
case MTBSF:
sc->sc_flags &= ~(CTF_AEOF|CTF_BEOF|CTF_EOT);
break;
case MTBSR:
sc->sc_flags &= ~CTF_BEOF;
if (sc->sc_flags & CTF_EOT) {
sc->sc_flags |= CTF_AEOF;
sc->sc_flags &= ~CTF_EOT;
} else if (sc->sc_flags & CTF_AEOF) {
sc->sc_flags |= CTF_BEOF;
sc->sc_flags &= ~CTF_AEOF;
}
break;
case MTWEOF:
sc->sc_flags &= ~CTF_BEOF;
if (sc->sc_flags & (CTF_AEOF|CTF_EOT)) {
sc->sc_flags |= CTF_EOT;
sc->sc_flags &= ~CTF_AEOF;
} else
sc->sc_flags |= CTF_AEOF;
break;
case MTREW:
case MTOFFL:
sc->sc_flags &= ~(CTF_BEOF|CTF_AEOF|CTF_EOT);
break;
}
} else {
sc->sc_flags &= ~CTF_AEOF;
sc->sc_blkno += CTBTOK(sc->sc_resid);
}
done:
DPRINTF(CDB_FILES, ("ctintr: after flags %x\n", sc->sc_flags));
ctdone(sc, bp);
}
void
ctdone(sc, bp)
struct ct_softc *sc;
struct buf *bp;
{
(void)BUFQ_GET(sc->sc_tab);
biodone(bp);
gpibrelease(sc->sc_ic, sc->sc_hdl);
if (BUFQ_PEEK(sc->sc_tab) == NULL) {
sc->sc_active = 0;
return;
}
ctustart(sc);
}
int
ctread(dev, uio, flags)
dev_t dev;
struct uio *uio;
int flags;
{
return (physio(ctstrategy, NULL, dev, B_READ, minphys, uio));
}
int
ctwrite(dev, uio, flags)
dev_t dev;
struct uio *uio;
int flags;
{
/* XXX: check for hardware write-protect? */
return (physio(ctstrategy, NULL, dev, B_WRITE, minphys, uio));
}
/*ARGSUSED*/
int
ctioctl(dev, cmd, data, flag, l)
dev_t dev;
u_long cmd;
int flag;
void *data;
struct lwp *l;
{
struct mtop *op;
int cnt;
switch (cmd) {
case MTIOCTOP:
op = (struct mtop *)data;
switch(op->mt_op) {
case MTWEOF:
case MTFSF:
case MTBSR:
case MTBSF:
case MTFSR:
cnt = op->mt_count;
break;
case MTREW:
case MTOFFL:
cnt = 1;
break;
default:
return (EINVAL);
}
ctcommand(dev, op->mt_op, cnt);
break;
case MTIOCGET:
break;
default:
return (EINVAL);
}
return (0);
}
void
ctaddeof(sc)
struct ct_softc *sc;
{
if (sc->sc_eofp == EOFS - 1)
sc->sc_eofs[EOFS - 1]++;
else {
sc->sc_eofp++;
if (sc->sc_eofp == EOFS - 1)
sc->sc_eofs[EOFS - 1] = EOFS;
else
/* save blkno */
sc->sc_eofs[sc->sc_eofp] = sc->sc_blkno - 1;
}
DPRINTF(CDB_BSF, ("%s: add eof pos %d blk %d\n",
device_xname(&sc->sc_dev), sc->sc_eofp,
sc->sc_eofs[sc->sc_eofp]));
}