445 lines
10 KiB
C
445 lines
10 KiB
C
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/*
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* Copyright (c) 1982, 1990 The Regents of the University of California.
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* 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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* from: @(#)ppi.c 7.3 (Berkeley) 12/16/90
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* $Id: par.c,v 1.1.1.1 1993/09/02 16:53:41 mw Exp $
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*/
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/*
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* parallel port interface
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XXXX NOT YET WORKING XXXXX
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*/
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#include "ppi.h"
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#if NPAR > 0
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#include "sys/param.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 "device.h"
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#include "parioctl.h"
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int parattach(), parstart(), partimo(), parintr();
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struct driver pardriver = {
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parattach, "par", parstart,
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};
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struct par_softc {
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int sc_flags;
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struct amiga_device *sc_ad;
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struct parparam 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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} par_softc[NPPI];
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/* sc_flags values */
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#define PARF_ALIVE 0x01
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#define PARF_OPEN 0x02
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#define PARF_UIO 0x04
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#define PARF_TIMO 0x08
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#define PARF_DELAY 0x10
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#define PARF_OREAD 0x40
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#define PARF_OWRITE 0x80
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#define UNIT(x) minor(x)
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#ifdef DEBUG
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int pardebug = 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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parattach(ad)
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register struct amiga_device *ad;
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{
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register struct par_softc *sc = &par_softc[ad->amiga_unit];
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#ifdef DEBUG
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if ((pardebug & PDB_NOCHECK) == 0)
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#endif
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sc->sc_flags = PARF_ALIVE;
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sc->sc_ad = ad;
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return(1);
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}
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paropen(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 par_softc *sc = &par_softc[unit];
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if (unit >= NPAR || (sc->sc_flags & PARF_ALIVE) == 0)
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return(ENXIO);
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#ifdef DEBUG
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if (pardebug & PDB_FOLLOW)
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printf("paropen(%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 & PARF_OPEN)
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return(EBUSY);
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/* can either read or write, but not both */
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if ((flags & (FREAD|FWRITE)) == (FREAD|FWRITE))
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return EINVAL;
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sc->sc_flags |= PARF_OPEN;
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if (flags & FREAD)
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sc->sc_flags |= PARF_OREAD;
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else
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sc->sc_flags |= PARF_OWRITE;
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sc->sc_burst = PAR_BURST;
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sc->sc_timo = parmstohz(PAR_TIMO);
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sc->sc_delay = parmstohz(PAR_DELAY);
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/* enable interrupts for CIAA-FLG */
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ciaa.icr = CIA_ICR_IR_SC | CIA_ICR_FLG;
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return(0);
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}
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parclose(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 par_softc *sc = &par_softc[unit];
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#ifdef DEBUG
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if (pardebug & PDB_FOLLOW)
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printf("parclose(%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 &= ~(PARF_OPEN|PARF_OREAD|PARF_OWRITE);
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/* don't allow interrupts for CIAA-FLG any longer */
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ciaa.icr = CIA_ICR_FLG;
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return(0);
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}
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parstart(unit)
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int unit;
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{
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#ifdef DEBUG
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if (pardebug & PDB_FOLLOW)
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printf("parstart(%x)\n", unit);
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#endif
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par_softc[unit].sc_flags &= ~PARF_DELAY;
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wakeup(&par_softc[unit]);
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}
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partimo(unit)
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int unit;
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{
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#ifdef DEBUG
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if (pardebug & PDB_FOLLOW)
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printf("partimo(%x)\n", unit);
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#endif
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par_softc[unit].sc_flags &= ~(PARF_UIO|PARF_TIMO);
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wakeup(&par_softc[unit]);
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}
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parread(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 (pardebug & PDB_FOLLOW)
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printf("parread(%x, %x)\n", dev, uio);
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#endif
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return (parrw(dev, uio));
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}
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parwrite(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 (pardebug & PDB_FOLLOW)
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printf("parwrite(%x, %x)\n", dev, uio);
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#endif
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return (parrw(dev, uio));
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}
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parrw(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 par_softc *sc = &par_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 ((sc->sc_flags & PARF_OREAD) ^^ (uio->uio_rw == UIO_READ))
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return EINVAL;
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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 (pardebug & (PDB_FOLLOW|PDB_IO))
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printf("parrw(%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 |= PARF_UIO;
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if (sc->sc_timo > 0) {
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sc->sc_flags |= PARF_TIMO;
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timeout(partimo, 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 0
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if ((sc->sc_flags & PARF_UIO) && hpibreq(&sc->sc_dq) == 0)
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sleep(sc, PRIBIO+1);
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#endif
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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 & PARF_UIO) == 0) {
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#ifdef DEBUG
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if (pardebug & PDB_IO)
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printf("parrw: 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 & PARF_TIMO) {
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untimeout(partimo, unit);
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sc->sc_flags &= ~PARF_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_ad->amiga_ctlr, sc->sc_ad->amiga_slave,
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sc->sc_sec, cp, len);
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else
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cnt = hpibrecv(sc->sc_ad->amiga_ctlr, sc->sc_ad->amiga_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 (pardebug & PDB_IO)
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printf("parrw: %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_ad->amiga_ctlr, sc->sc_ad->amiga_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 & PARF_UIO) == 0) {
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#ifdef DEBUG
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if (pardebug & PDB_IO)
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printf("parrw: 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 |= PARF_DELAY;
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timeout(parstart, unit, sc->sc_delay);
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error = tsleep(sc, PCATCH|PZERO-1, "par-cdelay", 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 & PARF_TIMO) {
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untimeout(partimo, unit);
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sc->sc_flags &= ~PARF_TIMO;
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}
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if (sc->sc_flags & PARF_DELAY) {
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untimeout(parstart, unit);
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sc->sc_flags &= ~PARF_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 (pardebug & PDB_IO)
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printf("parrw: 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 (pardebug & (PDB_FOLLOW|PDB_IO))
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printf("parrw: 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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parioctl(dev, cmd, data, flag)
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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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{
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struct par_softc *sc = &par_softc[UNIT(dev)];
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struct parparam *pp, *upp;
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int error = 0;
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switch (cmd) {
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case PARIOCGPARAM:
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pp = &sc->sc_param;
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upp = (struct parparam *)data;
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upp->burst = pp->burst;
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upp->timo = parhztoms(pp->timo);
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upp->delay = parhztoms(pp->delay);
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break;
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case PARIOCSPARAM:
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pp = &sc->sc_param;
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upp = (struct parparam *)data;
|
||
|
|
if (upp->burst < PAR_BURST_MIN || upp->burst > PAR_BURST_MAX ||
|
||
|
|
upp->delay < PAR_DELAY_MIN || upp->delay > PAR_DELAY_MAX)
|
||
|
|
return(EINVAL);
|
||
|
|
pp->burst = upp->burst;
|
||
|
|
pp->timo = parmstohz(upp->timo);
|
||
|
|
pp->delay = parmstohz(upp->delay);
|
||
|
|
break;
|
||
|
|
default:
|
||
|
|
return(EINVAL);
|
||
|
|
}
|
||
|
|
return (error);
|
||
|
|
}
|
||
|
|
|
||
|
|
parhztoms(h)
|
||
|
|
int h;
|
||
|
|
{
|
||
|
|
extern int hz;
|
||
|
|
register int m = h;
|
||
|
|
|
||
|
|
if (m > 0)
|
||
|
|
m = m * 1000 / hz;
|
||
|
|
return(m);
|
||
|
|
}
|
||
|
|
|
||
|
|
parmstohz(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);
|
||
|
|
}
|
||
|
|
|
||
|
|
void
|
||
|
|
parintr (mask)
|
||
|
|
int mask;
|
||
|
|
{
|
||
|
|
wakeup (parintr);
|
||
|
|
}
|
||
|
|
|
||
|
|
int
|
||
|
|
parsend (buf, len)
|
||
|
|
u_char *buf;
|
||
|
|
int len;
|
||
|
|
{
|
||
|
|
/* make sure I/O lines are setup right for output */
|
||
|
|
|
||
|
|
/* control lines set to input */
|
||
|
|
ciab.ddra &= ~(CIAB_PRA_SEL|CIAB_PRA_POUT|CIAB_PRA_BUSY);
|
||
|
|
/* data lines to output */
|
||
|
|
ciaa.ddrb = 0xff;
|
||
|
|
|
||
|
|
while (len)
|
||
|
|
{
|
||
|
|
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
#endif
|