410 lines
9.3 KiB
C
410 lines
9.3 KiB
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.
|
|
*
|
|
* from: @(#)ppi.c 7.3 (Berkeley) 12/16/90
|
|
* $Id: ppi.c,v 1.2 1993/05/22 07:56:41 cgd Exp $
|
|
*/
|
|
|
|
/*
|
|
* Printer/Plotter HPIB interface
|
|
*/
|
|
|
|
#include "ppi.h"
|
|
#if NPPI > 0
|
|
|
|
#include "sys/param.h"
|
|
#include "sys/errno.h"
|
|
#include "sys/uio.h"
|
|
#include "sys/malloc.h"
|
|
|
|
#include "device.h"
|
|
#include "ppiioctl.h"
|
|
|
|
int ppiattach(), ppistart(), ppitimo();
|
|
struct driver ppidriver = {
|
|
ppiattach, "ppi", ppistart,
|
|
};
|
|
|
|
struct ppi_softc {
|
|
int sc_flags;
|
|
struct devqueue sc_dq;
|
|
struct hp_device *sc_hd;
|
|
struct ppiparam sc_param;
|
|
#define sc_burst sc_param.burst
|
|
#define sc_timo sc_param.timo
|
|
#define sc_delay sc_param.delay
|
|
int sc_sec;
|
|
} ppi_softc[NPPI];
|
|
|
|
/* sc_flags values */
|
|
#define PPIF_ALIVE 0x01
|
|
#define PPIF_OPEN 0x02
|
|
#define PPIF_UIO 0x04
|
|
#define PPIF_TIMO 0x08
|
|
#define PPIF_DELAY 0x10
|
|
|
|
#define UNIT(x) minor(x)
|
|
|
|
#ifdef DEBUG
|
|
int ppidebug = 0x80;
|
|
#define PDB_FOLLOW 0x01
|
|
#define PDB_IO 0x02
|
|
#define PDB_NOCHECK 0x80
|
|
#endif
|
|
|
|
ppiattach(hd)
|
|
register struct hp_device *hd;
|
|
{
|
|
register struct ppi_softc *sc = &ppi_softc[hd->hp_unit];
|
|
|
|
#ifdef DEBUG
|
|
if ((ppidebug & PDB_NOCHECK) == 0)
|
|
#endif
|
|
/*
|
|
* XXX: the printer/plotter doesn't seem to really return
|
|
* an ID but this will at least prevent us from mistaking
|
|
* a cs80 disk or tape for a ppi device.
|
|
*/
|
|
if (hpibid(hd->hp_ctlr, hd->hp_slave) & 0x200)
|
|
return(0);
|
|
sc->sc_flags = PPIF_ALIVE;
|
|
sc->sc_dq.dq_ctlr = hd->hp_ctlr;
|
|
sc->sc_dq.dq_unit = hd->hp_unit;
|
|
sc->sc_dq.dq_slave = hd->hp_slave;
|
|
sc->sc_dq.dq_driver = &ppidriver;
|
|
sc->sc_hd = hd;
|
|
return(1);
|
|
}
|
|
|
|
ppiopen(dev, flags)
|
|
dev_t dev;
|
|
{
|
|
register int unit = UNIT(dev);
|
|
register struct ppi_softc *sc = &ppi_softc[unit];
|
|
|
|
if (unit >= NPPI || (sc->sc_flags & PPIF_ALIVE) == 0)
|
|
return(ENXIO);
|
|
#ifdef DEBUG
|
|
if (ppidebug & PDB_FOLLOW)
|
|
printf("ppiopen(%x, %x): flags %x\n",
|
|
dev, flags, sc->sc_flags);
|
|
#endif
|
|
if (sc->sc_flags & PPIF_OPEN)
|
|
return(EBUSY);
|
|
sc->sc_flags |= PPIF_OPEN;
|
|
sc->sc_burst = PPI_BURST;
|
|
sc->sc_timo = ppimstohz(PPI_TIMO);
|
|
sc->sc_delay = ppimstohz(PPI_DELAY);
|
|
sc->sc_sec = -1;
|
|
return(0);
|
|
}
|
|
|
|
ppiclose(dev, flags)
|
|
dev_t dev;
|
|
{
|
|
register int unit = UNIT(dev);
|
|
register struct ppi_softc *sc = &ppi_softc[unit];
|
|
|
|
#ifdef DEBUG
|
|
if (ppidebug & PDB_FOLLOW)
|
|
printf("ppiclose(%x, %x): flags %x\n",
|
|
dev, flags, sc->sc_flags);
|
|
#endif
|
|
sc->sc_flags &= ~PPIF_OPEN;
|
|
return(0);
|
|
}
|
|
|
|
ppistart(unit)
|
|
int unit;
|
|
{
|
|
#ifdef DEBUG
|
|
if (ppidebug & PDB_FOLLOW)
|
|
printf("ppistart(%x)\n", unit);
|
|
#endif
|
|
ppi_softc[unit].sc_flags &= ~PPIF_DELAY;
|
|
wakeup(&ppi_softc[unit]);
|
|
}
|
|
|
|
ppitimo(unit)
|
|
int unit;
|
|
{
|
|
#ifdef DEBUG
|
|
if (ppidebug & PDB_FOLLOW)
|
|
printf("ppitimo(%x)\n", unit);
|
|
#endif
|
|
ppi_softc[unit].sc_flags &= ~(PPIF_UIO|PPIF_TIMO);
|
|
wakeup(&ppi_softc[unit]);
|
|
}
|
|
|
|
ppiread(dev, uio)
|
|
dev_t dev;
|
|
struct uio *uio;
|
|
{
|
|
|
|
#ifdef DEBUG
|
|
if (ppidebug & PDB_FOLLOW)
|
|
printf("ppiread(%x, %x)\n", dev, uio);
|
|
#endif
|
|
return (ppirw(dev, uio));
|
|
}
|
|
|
|
ppiwrite(dev, uio)
|
|
dev_t dev;
|
|
struct uio *uio;
|
|
{
|
|
|
|
#ifdef DEBUG
|
|
if (ppidebug & PDB_FOLLOW)
|
|
printf("ppiwrite(%x, %x)\n", dev, uio);
|
|
#endif
|
|
return (ppirw(dev, uio));
|
|
}
|
|
|
|
ppirw(dev, uio)
|
|
dev_t dev;
|
|
register struct uio *uio;
|
|
{
|
|
int unit = UNIT(dev);
|
|
register struct ppi_softc *sc = &ppi_softc[unit];
|
|
register int s, len, cnt;
|
|
register char *cp;
|
|
int error = 0, gotdata = 0;
|
|
int buflen;
|
|
char *buf;
|
|
|
|
if (uio->uio_resid == 0)
|
|
return(0);
|
|
|
|
#ifdef DEBUG
|
|
if (ppidebug & (PDB_FOLLOW|PDB_IO))
|
|
printf("ppirw(%x, %x, %c): burst %d, timo %d, resid %x\n",
|
|
dev, uio, uio->uio_rw == UIO_READ ? 'R' : 'W',
|
|
sc->sc_burst, sc->sc_timo, uio->uio_resid);
|
|
#endif
|
|
buflen = MIN(sc->sc_burst, uio->uio_resid);
|
|
buf = (char *)malloc(buflen, M_DEVBUF, M_WAITOK);
|
|
sc->sc_flags |= PPIF_UIO;
|
|
if (sc->sc_timo > 0) {
|
|
sc->sc_flags |= PPIF_TIMO;
|
|
timeout(ppitimo, unit, sc->sc_timo);
|
|
}
|
|
while (uio->uio_resid > 0) {
|
|
len = MIN(buflen, uio->uio_resid);
|
|
cp = buf;
|
|
if (uio->uio_rw == UIO_WRITE) {
|
|
error = uiomove(cp, len, uio);
|
|
if (error)
|
|
break;
|
|
}
|
|
again:
|
|
s = splbio();
|
|
if ((sc->sc_flags & PPIF_UIO) && hpibreq(&sc->sc_dq) == 0)
|
|
sleep(sc, PRIBIO+1);
|
|
/*
|
|
* Check if we timed out during sleep or uiomove
|
|
*/
|
|
(void) splsoftclock();
|
|
if ((sc->sc_flags & PPIF_UIO) == 0) {
|
|
#ifdef DEBUG
|
|
if (ppidebug & PDB_IO)
|
|
printf("ppirw: uiomove/sleep timo, flags %x\n",
|
|
sc->sc_flags);
|
|
#endif
|
|
if (sc->sc_flags & PPIF_TIMO) {
|
|
untimeout(ppitimo, unit);
|
|
sc->sc_flags &= ~PPIF_TIMO;
|
|
}
|
|
splx(s);
|
|
break;
|
|
}
|
|
splx(s);
|
|
/*
|
|
* Perform the operation
|
|
*/
|
|
if (uio->uio_rw == UIO_WRITE)
|
|
cnt = hpibsend(sc->sc_hd->hp_ctlr, sc->sc_hd->hp_slave,
|
|
sc->sc_sec, cp, len);
|
|
else
|
|
cnt = hpibrecv(sc->sc_hd->hp_ctlr, sc->sc_hd->hp_slave,
|
|
sc->sc_sec, cp, len);
|
|
s = splbio();
|
|
hpibfree(&sc->sc_dq);
|
|
#ifdef DEBUG
|
|
if (ppidebug & PDB_IO)
|
|
printf("ppirw: %s(%d, %d, %x, %x, %d) -> %d\n",
|
|
uio->uio_rw == UIO_READ ? "recv" : "send",
|
|
sc->sc_hd->hp_ctlr, sc->sc_hd->hp_slave,
|
|
sc->sc_sec, cp, len, cnt);
|
|
#endif
|
|
splx(s);
|
|
if (uio->uio_rw == UIO_READ) {
|
|
if (cnt) {
|
|
error = uiomove(cp, cnt, uio);
|
|
if (error)
|
|
break;
|
|
gotdata++;
|
|
}
|
|
/*
|
|
* Didn't get anything this time, but did in the past.
|
|
* Consider us done.
|
|
*/
|
|
else if (gotdata)
|
|
break;
|
|
}
|
|
s = splsoftclock();
|
|
/*
|
|
* Operation timeout (or non-blocking), quit now.
|
|
*/
|
|
if ((sc->sc_flags & PPIF_UIO) == 0) {
|
|
#ifdef DEBUG
|
|
if (ppidebug & PDB_IO)
|
|
printf("ppirw: timeout/done\n");
|
|
#endif
|
|
splx(s);
|
|
break;
|
|
}
|
|
/*
|
|
* Implement inter-read delay
|
|
*/
|
|
if (sc->sc_delay > 0) {
|
|
sc->sc_flags |= PPIF_DELAY;
|
|
timeout(ppistart, unit, sc->sc_delay);
|
|
error = tsleep(sc, PCATCH|PZERO+1, "hpib", 0);
|
|
if (error) {
|
|
splx(s);
|
|
break;
|
|
}
|
|
}
|
|
splx(s);
|
|
/*
|
|
* Must not call uiomove again til we've used all data
|
|
* that we already grabbed.
|
|
*/
|
|
if (uio->uio_rw == UIO_WRITE && cnt != len) {
|
|
cp += cnt;
|
|
len -= cnt;
|
|
cnt = 0;
|
|
goto again;
|
|
}
|
|
}
|
|
s = splsoftclock();
|
|
if (sc->sc_flags & PPIF_TIMO) {
|
|
untimeout(ppitimo, unit);
|
|
sc->sc_flags &= ~PPIF_TIMO;
|
|
}
|
|
if (sc->sc_flags & PPIF_DELAY) {
|
|
untimeout(ppistart, unit);
|
|
sc->sc_flags &= ~PPIF_DELAY;
|
|
}
|
|
splx(s);
|
|
/*
|
|
* Adjust for those chars that we uiomove'ed but never wrote
|
|
*/
|
|
if (uio->uio_rw == UIO_WRITE && cnt != len) {
|
|
uio->uio_resid += (len - cnt);
|
|
#ifdef DEBUG
|
|
if (ppidebug & PDB_IO)
|
|
printf("ppirw: short write, adjust by %d\n",
|
|
len-cnt);
|
|
#endif
|
|
}
|
|
free(buf, M_DEVBUF);
|
|
#ifdef DEBUG
|
|
if (ppidebug & (PDB_FOLLOW|PDB_IO))
|
|
printf("ppirw: return %d, resid %d\n", error, uio->uio_resid);
|
|
#endif
|
|
return (error);
|
|
}
|
|
|
|
ppiioctl(dev, cmd, data, flag)
|
|
dev_t dev;
|
|
int cmd;
|
|
caddr_t data;
|
|
int flag;
|
|
{
|
|
struct ppi_softc *sc = &ppi_softc[UNIT(dev)];
|
|
struct ppiparam *pp, *upp;
|
|
int error = 0;
|
|
|
|
switch (cmd) {
|
|
case PPIIOCGPARAM:
|
|
pp = &sc->sc_param;
|
|
upp = (struct ppiparam *)data;
|
|
upp->burst = pp->burst;
|
|
upp->timo = ppihztoms(pp->timo);
|
|
upp->delay = ppihztoms(pp->delay);
|
|
break;
|
|
case PPIIOCSPARAM:
|
|
pp = &sc->sc_param;
|
|
upp = (struct ppiparam *)data;
|
|
if (upp->burst < PPI_BURST_MIN || upp->burst > PPI_BURST_MAX ||
|
|
upp->delay < PPI_DELAY_MIN || upp->delay > PPI_DELAY_MAX)
|
|
return(EINVAL);
|
|
pp->burst = upp->burst;
|
|
pp->timo = ppimstohz(upp->timo);
|
|
pp->delay = ppimstohz(upp->delay);
|
|
break;
|
|
case PPIIOCSSEC:
|
|
sc->sc_sec = *(int *)data;
|
|
break;
|
|
default:
|
|
return(EINVAL);
|
|
}
|
|
return (error);
|
|
}
|
|
|
|
ppihztoms(h)
|
|
int h;
|
|
{
|
|
extern int hz;
|
|
register int m = h;
|
|
|
|
if (m > 0)
|
|
m = m * 1000 / hz;
|
|
return(m);
|
|
}
|
|
|
|
ppimstohz(m)
|
|
int m;
|
|
{
|
|
extern int hz;
|
|
register int h = m;
|
|
|
|
if (h > 0) {
|
|
h = h * hz / 1000;
|
|
if (h == 0)
|
|
h = 1000 / hz;
|
|
}
|
|
return(h);
|
|
}
|
|
#endif
|