4.4BSD/usr/src/sys/hp300/dev/ppi.c
/*
* Copyright (c) 1982, 1990, 1993
* 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.
*
* @(#)ppi.c 8.1 (Berkeley) 6/16/93
*/
/*
* Printer/Plotter HPIB interface
*/
#include "ppi.h"
#if NPPI > 0
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/errno.h>
#include <sys/uio.h>
#include <sys/malloc.h>
#include <hp/dev/device.h>
#include <hp300/dev/ppiioctl.h>
int ppiattach(), ppistart();
void 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]);
return (0);
}
void
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, (void *)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, (void *)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((void (*)__P((void *)))ppistart, (void *)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, (void *)unit);
sc->sc_flags &= ~PPIF_TIMO;
}
if (sc->sc_flags & PPIF_DELAY) {
untimeout((void (*)__P((void *)))ppistart, (void *)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