515 lines
12 KiB
C
515 lines
12 KiB
C
/* $NetBSD: ppi.c,v 1.3 2005/02/27 00:26:59 perry Exp $ */
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/*-
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* Copyright (c) 1996-2003 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Jason R. Thorpe.
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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 NetBSD
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* Foundation, Inc. and its contributors.
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* 4. Neither the name of The NetBSD Foundation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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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. 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 GPIB interface
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: ppi.c,v 1.3 2005/02/27 00:26:59 perry Exp $");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/callout.h>
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#include <sys/conf.h>
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#include <sys/device.h>
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#include <sys/malloc.h>
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#include <sys/proc.h>
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#include <sys/uio.h>
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#include <dev/gpib/gpibvar.h>
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#include <dev/gpib/ppiio.h>
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struct ppi_softc {
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struct device sc_dev;
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gpib_chipset_tag_t sc_ic;
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gpib_handle_t sc_hdl;
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int sc_address; /* GPIB address */
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int sc_flags;
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int sc_sec;
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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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struct callout sc_timo_ch;
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struct callout sc_start_ch;
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};
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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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int ppimatch(struct device *, struct cfdata *, void *);
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void ppiattach(struct device *, struct device *, void *);
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CFATTACH_DECL(ppi, sizeof(struct ppi_softc),
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ppimatch, ppiattach, NULL, NULL);
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extern struct cfdriver ppi_cd;
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void ppicallback(void *, int);
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void ppistart(void *);
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void ppitimo(void *);
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int ppirw(dev_t, struct uio *);
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int ppihztoms(int);
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int ppimstohz(int);
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dev_type_open(ppiopen);
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dev_type_close(ppiclose);
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dev_type_read(ppiread);
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dev_type_write(ppiwrite);
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dev_type_ioctl(ppiioctl);
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const struct cdevsw ppi_cdevsw = {
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ppiopen, ppiclose, ppiread, ppiwrite, ppiioctl,
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nostop, notty, nopoll, nommap, nokqfilter,
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};
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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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#define DPRINTF(mask, str) if (ppidebug & (mask)) printf str
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#else
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#define DPRINTF(mask, str) /* nothing */
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#endif
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int
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ppimatch(parent, match, aux)
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struct device *parent;
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struct cfdata *match;
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void *aux;
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{
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return (1);
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}
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void
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ppiattach(parent, self, aux)
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struct device *parent, *self;
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void *aux;
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{
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struct ppi_softc *sc = (struct ppi_softc *)self;
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struct gpib_attach_args *ga = aux;
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printf("\n");
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sc->sc_ic = ga->ga_ic;
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sc->sc_address = ga->ga_address;
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callout_init(&sc->sc_timo_ch);
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callout_init(&sc->sc_start_ch);
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if (gpibregister(sc->sc_ic, sc->sc_address, ppicallback, sc,
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&sc->sc_hdl)) {
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printf("%s: can't register callback\n", sc->sc_dev.dv_xname);
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return;
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}
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sc->sc_flags = PPIF_ALIVE;
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}
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int
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ppiopen(dev, flags, fmt, p)
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dev_t dev;
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int flags, fmt;
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struct proc *p;
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{
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int unit = UNIT(dev);
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struct ppi_softc *sc;
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if (unit >= ppi_cd.cd_ndevs ||
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(sc = ppi_cd.cd_devs[unit]) == NULL ||
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(sc->sc_flags & PPIF_ALIVE) == 0)
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return (ENXIO);
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DPRINTF(PDB_FOLLOW, ("ppiopen(%x, %x): flags %x\n",
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dev, flags, sc->sc_flags));
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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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int
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ppiclose(dev, flags, fmt, p)
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dev_t dev;
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int flags, fmt;
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struct proc *p;
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{
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int unit = UNIT(dev);
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struct ppi_softc *sc = ppi_cd.cd_devs[unit];
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DPRINTF(PDB_FOLLOW, ("ppiclose(%x, %x): flags %x\n",
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dev, flags, sc->sc_flags));
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sc->sc_flags &= ~PPIF_OPEN;
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return (0);
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}
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void
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ppicallback(v, action)
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void *v;
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int action;
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{
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struct ppi_softc *sc = v;
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DPRINTF(PDB_FOLLOW, ("ppicallback: v=%p, action=%d\n", v, action));
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switch (action) {
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case GPIBCBF_START:
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ppistart(sc);
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case GPIBCBF_INTR:
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/* no-op */
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break;
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#ifdef DEBUG
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default:
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DPRINTF(PDB_FOLLOW, ("ppicallback: unknown action %d\n",
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action));
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break;
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#endif
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}
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}
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void
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ppistart(v)
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void *v;
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{
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struct ppi_softc *sc = v;
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DPRINTF(PDB_FOLLOW, ("ppistart(%x)\n", sc->sc_dev.dv_unit));
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sc->sc_flags &= ~PPIF_DELAY;
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wakeup(sc);
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}
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void
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ppitimo(arg)
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void *arg;
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{
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struct ppi_softc *sc = arg;
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DPRINTF(PDB_FOLLOW, ("ppitimo(%x)\n", sc->sc_dev.dv_unit));
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sc->sc_flags &= ~(PPIF_UIO|PPIF_TIMO);
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wakeup(sc);
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}
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int
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ppiread(dev, uio, flags)
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dev_t dev;
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struct uio *uio;
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int flags;
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{
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DPRINTF(PDB_FOLLOW, ("ppiread(%x, %p)\n", dev, uio));
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return (ppirw(dev, uio));
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}
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int
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ppiwrite(dev, uio, flags)
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dev_t dev;
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struct uio *uio;
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int flags;
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{
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DPRINTF(PDB_FOLLOW, ("ppiwrite(%x, %p)\n", dev, uio));
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return (ppirw(dev, uio));
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}
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int
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ppirw(dev, uio)
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dev_t dev;
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struct uio *uio;
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{
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int unit = UNIT(dev);
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struct ppi_softc *sc = ppi_cd.cd_devs[unit];
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int s, len, cnt;
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char *cp;
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int error = 0, gotdata = 0;
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int buflen, address;
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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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address = sc->sc_address;
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DPRINTF(PDB_FOLLOW|PDB_IO,
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("ppirw(%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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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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callout_reset(&sc->sc_timo_ch, sc->sc_timo, ppitimo, sc);
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}
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len = cnt = 0;
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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) {
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if (gpibrequest(sc->sc_ic, sc->sc_hdl) == 0)
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(void) tsleep(sc, PRIBIO + 1, "ppirw", 0);
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}
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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 & PPIF_UIO) == 0) {
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DPRINTF(PDB_IO,
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("ppirw: uiomove/sleep timo, flags %x\n",
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sc->sc_flags));
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if (sc->sc_flags & PPIF_TIMO) {
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callout_stop(&sc->sc_timo_ch);
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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 = gpibsend(sc->sc_ic, address, sc->sc_sec,
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cp, len);
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else
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cnt = gpibrecv(sc->sc_ic, address, sc->sc_sec,
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cp, len);
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s = splbio();
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gpibrelease(sc->sc_ic, sc->sc_hdl);
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DPRINTF(PDB_IO, ("ppirw: %s(%d, %x, %p, %d) -> %d\n",
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uio->uio_rw == UIO_READ ? "recv" : "send",
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address, sc->sc_sec, cp, len, cnt));
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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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DPRINTF(PDB_IO, ("ppirw: timeout/done\n"));
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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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callout_reset(&sc->sc_start_ch, sc->sc_delay,
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ppistart, sc);
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error = tsleep(sc, (PCATCH|PZERO) + 1, "gpib", 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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callout_stop(&sc->sc_timo_ch);
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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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callout_stop(&sc->sc_start_ch);
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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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DPRINTF(PDB_IO, ("ppirw: short write, adjust by %d\n",
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len - cnt));
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}
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free(buf, M_DEVBUF);
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DPRINTF(PDB_FOLLOW|PDB_IO, ("ppirw: return %d, resid %d\n",
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error, uio->uio_resid));
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return (error);
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}
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int
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ppiioctl(dev, cmd, data, flag, p)
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dev_t dev;
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u_long 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_cd.cd_devs[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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int
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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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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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ppimstohz(m)
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int m;
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{
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extern int hz;
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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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