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- /*
- * 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.
- *
- * @(#)ppi.c 7.3 (Berkeley) 12/16/90
- */
-
- /*
- * 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
-