604 lines
13 KiB
C
604 lines
13 KiB
C
/* $NetBSD: par.c,v 1.30 2003/08/07 16:26:43 agc Exp $ */
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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. 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 7.3 (Berkeley) 12/16/90
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: par.c,v 1.30 2003/08/07 16:26:43 agc Exp $");
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/*
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* parallel port interface
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*/
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#include "par.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/device.h>
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#include <sys/malloc.h>
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#include <sys/file.h>
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#include <sys/systm.h>
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#include <sys/callout.h>
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#include <sys/proc.h>
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#include <sys/conf.h>
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#include <amiga/amiga/device.h>
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#include <amiga/amiga/cia.h>
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#include <amiga/dev/parioctl.h>
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struct par_softc {
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struct device sc_dev;
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int sc_flags;
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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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struct callout sc_timo_ch;
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struct callout sc_start_ch;
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} *par_softcp;
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#define getparsp(x) (x > 0 ? NULL : par_softcp)
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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 = 0;
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#define PDB_FOLLOW 0x01
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#define PDB_IO 0x02
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#define PDB_INTERRUPT 0x04
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#define PDB_NOCHECK 0x80
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#endif
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int parrw(dev_t, struct uio *);
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int parhztoms(int);
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int parmstohz(int);
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int parsend(u_char *, int);
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int parreceive(u_char *, int);
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int parsendch(u_char);
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void partimo(void *);
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void parstart(void *);
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void parintr(void *);
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void parattach(struct device *, struct device *, void *);
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int parmatch(struct device *, struct cfdata *, void *);
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CFATTACH_DECL(par, sizeof(struct par_softc),
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parmatch, parattach, NULL, NULL);
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dev_type_open(paropen);
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dev_type_close(parclose);
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dev_type_read(parread);
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dev_type_write(parwrite);
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dev_type_ioctl(parioctl);
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const struct cdevsw par_cdevsw = {
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paropen, parclose, parread, parwrite, parioctl,
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nostop, notty, nopoll, nommap, nokqfilter,
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};
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/*ARGSUSED*/
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int
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parmatch(struct device *pdp, struct cfdata *cfp, void *auxp)
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{
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static int par_found = 0;
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if (!matchname((char *)auxp, "par") || par_found)
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return(0);
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par_found = 1;
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return(1);
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}
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void
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parattach(struct device *pdp, struct device *dp, void *auxp)
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{
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par_softcp = (struct par_softc *)dp;
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#ifdef DEBUG
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if ((pardebug & PDB_NOCHECK) == 0)
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#endif
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par_softcp->sc_flags = PARF_ALIVE;
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printf("\n");
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callout_init(&par_softcp->sc_timo_ch);
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callout_init(&par_softcp->sc_start_ch);
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}
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int
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paropen(dev_t dev, int flags, int mode, struct proc *p)
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{
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int unit = UNIT(dev);
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struct par_softc *sc = getparsp(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, ",
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dev, flags, sc->sc_flags);
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printf ("port = $%x\n", ((ciab.pra ^ CIAB_PRA_SEL)
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& (CIAB_PRA_SEL|CIAB_PRA_BUSY|CIAB_PRA_POUT)));
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}
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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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int
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parclose(dev_t dev, int flags, int mode, struct proc *p)
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{
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int unit = UNIT(dev);
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struct par_softc *sc = getparsp(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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void
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parstart(void *arg)
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{
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struct par_softc *sc = arg;
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#ifdef DEBUG
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if (pardebug & PDB_FOLLOW)
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printf("parstart(%x)\n", sc->sc_dev.dv_unit);
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#endif
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sc->sc_flags &= ~PARF_DELAY;
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wakeup(sc);
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}
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void
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partimo(void *arg)
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{
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struct par_softc *sc = arg;
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#ifdef DEBUG
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if (pardebug & PDB_FOLLOW)
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printf("partimo(%x)\n", sc->sc_dev.dv_unit);
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#endif
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sc->sc_flags &= ~(PARF_UIO|PARF_TIMO);
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wakeup(sc);
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}
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int
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parread(dev_t dev, struct uio *uio, int flags)
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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, %p)\n", dev, uio);
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#endif
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return (parrw(dev, uio));
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}
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int
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parwrite(dev_t dev, struct uio *uio, int flags)
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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, %p)\n", dev, uio);
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#endif
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return (parrw(dev, uio));
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}
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int
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parrw(dev_t dev, 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 = getparsp(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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len = 0;
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cnt = 0;
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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, %p, %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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{
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sc->sc_flags |= PARF_TIMO;
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callout_reset(&sc->sc_timo_ch, sc->sc_timo, partimo, sc);
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}
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while (uio->uio_resid > 0)
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{
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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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{
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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) spllowersoftclock();
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if ((sc->sc_flags & PARF_UIO) == 0)
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{
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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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{
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callout_stop(&sc->sc_timo_ch);
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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 = parsend (cp, len);
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else
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cnt = parreceive (cp, len);
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if (cnt < 0)
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{
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error = -cnt;
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break;
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}
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s = splbio();
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#if 0
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hpibfree(&sc->sc_dq);
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#endif
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#ifdef DEBUG
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if (pardebug & PDB_IO)
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printf("parrw: %s(%p, %d) -> %d\n",
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uio->uio_rw == UIO_READ ? "recv" : "send", 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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{
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if (cnt)
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{
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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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{
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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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{
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sc->sc_flags |= PARF_DELAY;
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callout_reset(&sc->sc_start_ch, sc->sc_delay, parstart, sc);
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error = tsleep(sc, PCATCH | (PZERO - 1), "par-cdelay", 0);
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if (error)
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{
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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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{
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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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{
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callout_stop(&sc->sc_timo_ch);
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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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{
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callout_stop(&sc->sc_start_ch);
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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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{
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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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int
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parioctl(dev_t dev, u_long cmd, caddr_t data, int flag, struct proc *p)
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{
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struct par_softc *sc = getparsp(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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{
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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;
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if (upp->burst < PAR_BURST_MIN || upp->burst > PAR_BURST_MAX ||
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upp->delay < PAR_DELAY_MIN || upp->delay > PAR_DELAY_MAX)
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return(EINVAL);
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pp->burst = upp->burst;
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pp->timo = parmstohz(upp->timo);
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pp->delay = parmstohz(upp->delay);
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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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int
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parhztoms(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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int
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parmstohz(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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/* stuff below here if for interrupt driven output of data thru
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the parallel port. */
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int parsend_pending;
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void
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parintr(void *arg)
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{
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int s;
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s = splclock();
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#ifdef DEBUG
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if (pardebug & PDB_INTERRUPT)
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printf("parintr\n");
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#endif
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parsend_pending = 0;
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wakeup(parintr);
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splx(s);
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}
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int
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parsendch (u_char ch)
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{
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int error = 0;
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int s;
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/* if either offline, busy or out of paper, wait for that
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condition to clear */
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s = splclock();
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while (!error
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&& (parsend_pending
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|| ((ciab.pra ^ CIAB_PRA_SEL)
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& (CIAB_PRA_SEL|CIAB_PRA_BUSY|CIAB_PRA_POUT))))
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{
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extern int hz;
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#ifdef DEBUG
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if (pardebug & PDB_INTERRUPT)
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printf ("parsendch, port = $%x\n",
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((ciab.pra ^ CIAB_PRA_SEL)
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& (CIAB_PRA_SEL|CIAB_PRA_BUSY|CIAB_PRA_POUT)));
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#endif
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/* this is essentially a flipflop to have us wait for the
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first character being transmitted when trying to transmit
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the second, etc. */
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parsend_pending = 0;
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/* it's quite important that a parallel putc can be
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interrupted, given the possibility to lock a printer
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in an offline condition.. */
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|
error = tsleep(parintr, PCATCH | (PZERO - 1), "parsendch", hz);
|
|
if (error == EWOULDBLOCK)
|
|
error = 0;
|
|
if (error > 0)
|
|
{
|
|
#ifdef DEBUG
|
|
if (pardebug & PDB_INTERRUPT)
|
|
printf ("parsendch interrupted, error = %d\n", error);
|
|
#endif
|
|
}
|
|
}
|
|
|
|
if (! error)
|
|
{
|
|
#ifdef DEBUG
|
|
if (pardebug & PDB_INTERRUPT)
|
|
printf ("#%d", ch);
|
|
#endif
|
|
ciaa.prb = ch;
|
|
parsend_pending = 1;
|
|
}
|
|
|
|
splx (s);
|
|
|
|
return error;
|
|
}
|
|
|
|
|
|
int
|
|
parsend (u_char *buf, int len)
|
|
{
|
|
int err, orig_len = 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;
|
|
|
|
for (; len; len--, buf++)
|
|
if ((err = parsendch (*buf)) != 0)
|
|
return err < 0 ? -EINTR : -err;
|
|
|
|
/* either all or nothing.. */
|
|
return orig_len;
|
|
}
|
|
|
|
|
|
|
|
int
|
|
parreceive (u_char *buf, int len)
|
|
{
|
|
/* oh deary me, something's gotta be left to be implemented
|
|
later... */
|
|
return 0;
|
|
}
|
|
|
|
|
|
#endif
|