417 lines
9.5 KiB
C
417 lines
9.5 KiB
C
/* $NetBSD: ppi.c,v 1.6 1994/10/26 07:24:46 cgd Exp $ */
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/*
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* Copyright (c) 1982, 1990, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)ppi.c 8.1 (Berkeley) 6/16/93
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*/
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/*
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* Printer/Plotter HPIB interface
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*/
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#include "ppi.h"
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#if NPPI > 0
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/errno.h>
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#include <sys/uio.h>
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#include <sys/malloc.h>
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#include <hp300/dev/device.h>
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#include <hp300/dev/ppiioctl.h>
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int ppiattach(), ppistart();
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void ppitimo();
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struct driver ppidriver = {
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ppiattach, "ppi", ppistart,
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};
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struct ppi_softc {
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int sc_flags;
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struct devqueue sc_dq;
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struct hp_device *sc_hd;
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struct ppiparam sc_param;
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#define sc_burst sc_param.burst
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#define sc_timo sc_param.timo
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#define sc_delay sc_param.delay
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int sc_sec;
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} ppi_softc[NPPI];
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/* sc_flags values */
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#define PPIF_ALIVE 0x01
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#define PPIF_OPEN 0x02
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#define PPIF_UIO 0x04
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#define PPIF_TIMO 0x08
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#define PPIF_DELAY 0x10
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#define UNIT(x) minor(x)
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#ifdef DEBUG
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int ppidebug = 0x80;
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#define PDB_FOLLOW 0x01
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#define PDB_IO 0x02
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#define PDB_NOCHECK 0x80
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#endif
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ppiattach(hd)
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register struct hp_device *hd;
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{
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register struct ppi_softc *sc = &ppi_softc[hd->hp_unit];
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#ifdef DEBUG
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if ((ppidebug & PDB_NOCHECK) == 0)
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#endif
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/*
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* XXX: the printer/plotter doesn't seem to really return
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* an ID but this will at least prevent us from mistaking
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* a cs80 disk or tape for a ppi device.
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*/
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if (hpibid(hd->hp_ctlr, hd->hp_slave) & 0x200)
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return(0);
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sc->sc_flags = PPIF_ALIVE;
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sc->sc_dq.dq_ctlr = hd->hp_ctlr;
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sc->sc_dq.dq_unit = hd->hp_unit;
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sc->sc_dq.dq_slave = hd->hp_slave;
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sc->sc_dq.dq_driver = &ppidriver;
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sc->sc_hd = hd;
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return(1);
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}
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ppiopen(dev, flags)
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dev_t dev;
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{
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register int unit = UNIT(dev);
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register struct ppi_softc *sc = &ppi_softc[unit];
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if (unit >= NPPI || (sc->sc_flags & PPIF_ALIVE) == 0)
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return(ENXIO);
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#ifdef DEBUG
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if (ppidebug & PDB_FOLLOW)
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printf("ppiopen(%x, %x): flags %x\n",
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dev, flags, sc->sc_flags);
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#endif
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if (sc->sc_flags & PPIF_OPEN)
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return(EBUSY);
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sc->sc_flags |= PPIF_OPEN;
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sc->sc_burst = PPI_BURST;
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sc->sc_timo = ppimstohz(PPI_TIMO);
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sc->sc_delay = ppimstohz(PPI_DELAY);
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sc->sc_sec = -1;
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return(0);
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}
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ppiclose(dev, flags)
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dev_t dev;
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{
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register int unit = UNIT(dev);
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register struct ppi_softc *sc = &ppi_softc[unit];
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#ifdef DEBUG
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if (ppidebug & PDB_FOLLOW)
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printf("ppiclose(%x, %x): flags %x\n",
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dev, flags, sc->sc_flags);
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#endif
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sc->sc_flags &= ~PPIF_OPEN;
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return(0);
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}
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ppistart(unit)
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int unit;
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{
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#ifdef DEBUG
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if (ppidebug & PDB_FOLLOW)
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printf("ppistart(%x)\n", unit);
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#endif
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ppi_softc[unit].sc_flags &= ~PPIF_DELAY;
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wakeup(&ppi_softc[unit]);
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return (0);
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}
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void
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ppitimo(unit)
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int unit;
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{
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#ifdef DEBUG
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if (ppidebug & PDB_FOLLOW)
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printf("ppitimo(%x)\n", unit);
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#endif
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ppi_softc[unit].sc_flags &= ~(PPIF_UIO|PPIF_TIMO);
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wakeup(&ppi_softc[unit]);
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}
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ppiread(dev, uio)
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dev_t dev;
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struct uio *uio;
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{
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#ifdef DEBUG
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if (ppidebug & PDB_FOLLOW)
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printf("ppiread(%x, %x)\n", dev, uio);
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#endif
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return (ppirw(dev, uio));
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}
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ppiwrite(dev, uio)
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dev_t dev;
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struct uio *uio;
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{
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#ifdef DEBUG
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if (ppidebug & PDB_FOLLOW)
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printf("ppiwrite(%x, %x)\n", dev, uio);
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#endif
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return (ppirw(dev, uio));
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}
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ppirw(dev, uio)
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dev_t dev;
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register struct uio *uio;
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{
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int unit = UNIT(dev);
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register struct ppi_softc *sc = &ppi_softc[unit];
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register int s, len, cnt;
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register char *cp;
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int error = 0, gotdata = 0;
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int buflen;
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char *buf;
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if (uio->uio_resid == 0)
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return(0);
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#ifdef DEBUG
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if (ppidebug & (PDB_FOLLOW|PDB_IO))
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printf("ppirw(%x, %x, %c): burst %d, timo %d, resid %x\n",
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dev, uio, uio->uio_rw == UIO_READ ? 'R' : 'W',
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sc->sc_burst, sc->sc_timo, uio->uio_resid);
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#endif
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buflen = min(sc->sc_burst, uio->uio_resid);
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buf = (char *)malloc(buflen, M_DEVBUF, M_WAITOK);
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sc->sc_flags |= PPIF_UIO;
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if (sc->sc_timo > 0) {
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sc->sc_flags |= PPIF_TIMO;
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timeout(ppitimo, (void *)unit, sc->sc_timo);
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}
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while (uio->uio_resid > 0) {
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len = min(buflen, uio->uio_resid);
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cp = buf;
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if (uio->uio_rw == UIO_WRITE) {
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error = uiomove(cp, len, uio);
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if (error)
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break;
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}
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again:
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s = splbio();
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if ((sc->sc_flags & PPIF_UIO) && hpibreq(&sc->sc_dq) == 0)
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sleep(sc, PRIBIO+1);
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/*
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* Check if we timed out during sleep or uiomove
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*/
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(void) splsoftclock();
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if ((sc->sc_flags & PPIF_UIO) == 0) {
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#ifdef DEBUG
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if (ppidebug & PDB_IO)
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printf("ppirw: uiomove/sleep timo, flags %x\n",
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sc->sc_flags);
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#endif
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if (sc->sc_flags & PPIF_TIMO) {
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untimeout(ppitimo, (void *)unit);
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sc->sc_flags &= ~PPIF_TIMO;
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}
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splx(s);
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break;
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}
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splx(s);
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/*
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* Perform the operation
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*/
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if (uio->uio_rw == UIO_WRITE)
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cnt = hpibsend(sc->sc_hd->hp_ctlr, sc->sc_hd->hp_slave,
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sc->sc_sec, cp, len);
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else
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cnt = hpibrecv(sc->sc_hd->hp_ctlr, sc->sc_hd->hp_slave,
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sc->sc_sec, cp, len);
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s = splbio();
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hpibfree(&sc->sc_dq);
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#ifdef DEBUG
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if (ppidebug & PDB_IO)
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printf("ppirw: %s(%d, %d, %x, %x, %d) -> %d\n",
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uio->uio_rw == UIO_READ ? "recv" : "send",
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sc->sc_hd->hp_ctlr, sc->sc_hd->hp_slave,
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sc->sc_sec, cp, len, cnt);
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#endif
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splx(s);
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if (uio->uio_rw == UIO_READ) {
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if (cnt) {
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error = uiomove(cp, cnt, uio);
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if (error)
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break;
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gotdata++;
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}
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/*
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* Didn't get anything this time, but did in the past.
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* Consider us done.
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*/
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else if (gotdata)
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break;
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}
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s = splsoftclock();
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/*
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* Operation timeout (or non-blocking), quit now.
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*/
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if ((sc->sc_flags & PPIF_UIO) == 0) {
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#ifdef DEBUG
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if (ppidebug & PDB_IO)
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printf("ppirw: timeout/done\n");
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#endif
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splx(s);
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break;
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}
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/*
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* Implement inter-read delay
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*/
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if (sc->sc_delay > 0) {
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sc->sc_flags |= PPIF_DELAY;
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timeout((void (*)__P((void *)))ppistart, (void *)unit,
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sc->sc_delay);
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error = tsleep(sc, PCATCH|PZERO+1, "hpib", 0);
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if (error) {
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splx(s);
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break;
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}
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}
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splx(s);
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/*
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* Must not call uiomove again til we've used all data
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* that we already grabbed.
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*/
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if (uio->uio_rw == UIO_WRITE && cnt != len) {
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cp += cnt;
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len -= cnt;
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cnt = 0;
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goto again;
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}
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}
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s = splsoftclock();
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if (sc->sc_flags & PPIF_TIMO) {
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untimeout(ppitimo, (void *)unit);
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sc->sc_flags &= ~PPIF_TIMO;
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}
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if (sc->sc_flags & PPIF_DELAY) {
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untimeout((void (*)__P((void *)))ppistart, (void *)unit);
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sc->sc_flags &= ~PPIF_DELAY;
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}
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splx(s);
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/*
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* Adjust for those chars that we uiomove'ed but never wrote
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*/
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if (uio->uio_rw == UIO_WRITE && cnt != len) {
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uio->uio_resid += (len - cnt);
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#ifdef DEBUG
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if (ppidebug & PDB_IO)
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printf("ppirw: short write, adjust by %d\n",
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len-cnt);
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#endif
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}
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free(buf, M_DEVBUF);
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#ifdef DEBUG
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if (ppidebug & (PDB_FOLLOW|PDB_IO))
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printf("ppirw: return %d, resid %d\n", error, uio->uio_resid);
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#endif
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return (error);
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}
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ppiioctl(dev, cmd, data, flag, p)
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dev_t dev;
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int cmd;
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caddr_t data;
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int flag;
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struct proc *p;
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{
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struct ppi_softc *sc = &ppi_softc[UNIT(dev)];
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struct ppiparam *pp, *upp;
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int error = 0;
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switch (cmd) {
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case PPIIOCGPARAM:
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pp = &sc->sc_param;
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upp = (struct ppiparam *)data;
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upp->burst = pp->burst;
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upp->timo = ppihztoms(pp->timo);
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upp->delay = ppihztoms(pp->delay);
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break;
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case PPIIOCSPARAM:
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pp = &sc->sc_param;
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upp = (struct ppiparam *)data;
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if (upp->burst < PPI_BURST_MIN || upp->burst > PPI_BURST_MAX ||
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upp->delay < PPI_DELAY_MIN || upp->delay > PPI_DELAY_MAX)
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return(EINVAL);
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pp->burst = upp->burst;
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pp->timo = ppimstohz(upp->timo);
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pp->delay = ppimstohz(upp->delay);
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break;
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case PPIIOCSSEC:
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sc->sc_sec = *(int *)data;
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break;
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default:
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return(EINVAL);
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}
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return (error);
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}
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ppihztoms(h)
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int h;
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{
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extern int hz;
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register int m = h;
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if (m > 0)
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m = m * 1000 / hz;
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return(m);
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}
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ppimstohz(m)
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int m;
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{
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extern int hz;
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register int h = m;
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if (h > 0) {
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h = h * hz / 1000;
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if (h == 0)
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h = 1000 / hz;
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}
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return(h);
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}
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#endif
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