567 lines
13 KiB
C
567 lines
13 KiB
C
/* $NetBSD: par.c,v 1.34 2007/07/14 14:13:21 isaki 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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/*
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* parallel port interface
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: par.c,v 1.34 2007/07/14 14:13:21 isaki Exp $");
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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 <sys/kernel.h>
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#include <machine/bus.h>
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#include <machine/cpu.h>
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#include <machine/parioctl.h>
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#include <arch/x68k/dev/intiovar.h>
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struct par_softc {
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struct device sc_dev;
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bus_space_tag_t sc_bst;
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bus_space_handle_t sc_bsh;
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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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} ;
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/* par registers */
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#define PAR_DATA 1
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#define PAR_STROBE 3
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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 /* no support */
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#define PARF_OWRITE 0x80
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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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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 parsendch(struct par_softc *, u_char);
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int parsend(struct par_softc *, u_char *, int);
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static struct callout intr_callout;
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#define UNIT(x) minor(x)
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#ifdef DEBUG
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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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#ifdef PARDEBUG
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int pardebug = PDB_FOLLOW | PDB_IO | PDB_INTERRUPT;
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#else
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int pardebug = 0;
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#endif
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#endif
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int parmatch(struct device *, struct cfdata *, void *);
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void parattach(struct device *, struct device *, void *);
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CFATTACH_DECL(par, sizeof(struct par_softc),
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parmatch, parattach, NULL, NULL);
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extern struct cfdriver par_cd;
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static int par_attached;
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dev_type_open(paropen);
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dev_type_close(parclose);
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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, noread, parwrite, parioctl,
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nostop, notty, nopoll, nommap, nokqfilter,
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};
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int
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parmatch(struct device *pdp, struct cfdata *cfp, void *aux)
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{
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struct intio_attach_args *ia = aux;
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/* X680x0 has only one parallel port */
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if (strcmp(ia->ia_name, "par") || par_attached)
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return 0;
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if (ia->ia_addr == INTIOCF_ADDR_DEFAULT)
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ia->ia_addr = 0xe8c000;
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ia->ia_size = 0x2000;
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if (intio_map_allocate_region(pdp, ia, INTIO_MAP_TESTONLY))
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return 0;
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if (ia->ia_intr == INTIOCF_INTR_DEFAULT)
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ia->ia_intr = 99;
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#if DIAGNOSTIC
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if (ia->ia_intr != 99)
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return 0;
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#endif
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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 *aux)
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{
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struct par_softc *sc = (struct par_softc *)dp;
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struct intio_attach_args *ia = aux;
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int r;
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par_attached = 1;
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sc->sc_flags = PARF_ALIVE;
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printf(": parallel port (write only, interrupt)\n");
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ia->ia_size = 0x2000;
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r = intio_map_allocate_region(pdp, ia, INTIO_MAP_ALLOCATE);
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#ifdef DIAGNOSTIC
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if (r)
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panic("IO map for PAR corruption??");
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#endif
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sc->sc_bst = ia->ia_bst;
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r = bus_space_map(sc->sc_bst,
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ia->ia_addr, ia->ia_size,
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BUS_SPACE_MAP_SHIFTED,
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&sc->sc_bsh);
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#ifdef DIAGNOSTIC
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if (r)
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panic("Cannot map IO space for PAR.");
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#endif
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intio_set_sicilian_intr(intio_get_sicilian_intr() &
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~SICILIAN_INTR_PAR);
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intio_intr_establish(ia->ia_intr, "par",
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(intio_intr_handler_t)parintr, (void *)1);
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callout_init(&sc->sc_timo_ch, 0);
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callout_init(&sc->sc_start_ch, 0);
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callout_init(&intr_callout, 0);
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}
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int
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paropen(dev_t dev, int flags, int mode, struct lwp *l)
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{
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int unit = UNIT(dev);
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struct par_softc *sc;
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sc = device_lookup(&par_cd, unit);
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if (sc == NULL || !(sc->sc_flags & PARF_ALIVE))
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return(ENXIO);
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if (sc->sc_flags & PARF_OPEN)
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return(EBUSY);
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/* X680x0 can't read */
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if ((flags & FREAD) == FREAD)
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return (EINVAL);
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sc->sc_flags |= PARF_OPEN;
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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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return(0);
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}
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int
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parclose(dev_t dev, int flags, int mode, struct lwp *l)
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{
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int unit = UNIT(dev);
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int s;
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struct par_softc *sc = par_cd.cd_devs[unit];
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sc->sc_flags &= ~(PARF_OPEN|PARF_OWRITE);
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/* don't allow interrupts any longer */
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s = spl1();
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intio_set_sicilian_intr(intio_get_sicilian_intr() &
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~SICILIAN_INTR_PAR);
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splx(s);
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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", device_unit(&sc->sc_dev));
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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", device_unit(&sc->sc_dev));
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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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parwrite(dev_t dev, struct uio *uio, int flag)
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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, struct uio *uio)
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{
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int unit = UNIT(dev);
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struct par_softc *sc = par_cd.cd_devs[unit];
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int len=0xdeadbeef; /* XXX: shutup gcc */
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int s, cnt=0;
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char *cp;
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int error = 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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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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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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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 = splsoftclock();
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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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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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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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cnt = parsend(sc, cp, len);
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if (cnt < 0) {
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error = -cnt;
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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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callout_reset(&sc->sc_start_ch, sc->sc_delay,
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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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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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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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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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/*
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* XXXjdolecek: this len usage is wrong, this will be incorrect
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* if the transfer size is longer than sc_burst
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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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int
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parioctl(dev_t dev, u_long cmd, void *data, int flag, struct lwp *l)
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{
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struct par_softc *sc = par_cd.cd_devs[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;
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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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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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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 partimeout_pending;
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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, mask;
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mask = (int)arg;
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s = splclock();
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intio_set_sicilian_intr(intio_get_sicilian_intr() &
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~SICILIAN_INTR_PAR);
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#ifdef DEBUG
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if (pardebug & PDB_INTERRUPT)
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printf("parintr %d(%s)\n", mask, mask ? "FLG" : "tout");
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#endif
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/* if invoked from timeout handler, mask will be 0,
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* if from interrupt, it will contain the cia-icr mask,
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* which is != 0
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*/
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if (mask) {
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if (partimeout_pending)
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callout_stop(&intr_callout);
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if (parsend_pending)
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parsend_pending = 0;
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}
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/* either way, there won't be a timeout pending any longer */
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partimeout_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(struct par_softc *sc, 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 = spl1();
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while (!error
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&& (parsend_pending
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|| !(intio_get_sicilian_intr() & SICILIAN_STAT_PAR)))
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{
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/* wait a second, and try again */
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callout_reset(&intr_callout, hz, parintr, 0);
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partimeout_pending = 1;
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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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if ((error = tsleep(parintr, PCATCH|(PZERO-1), "parsendch", 0))) {
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#ifdef DEBUG
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if (pardebug & PDB_INTERRUPT)
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printf("parsendch interrupted, error = %d\n", error);
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#endif
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if (partimeout_pending)
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callout_stop(&intr_callout);
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partimeout_pending = 0;
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}
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}
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if (!error) {
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#ifdef DEBUG
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if (pardebug & PDB_INTERRUPT)
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|
printf("#%d", ch);
|
|
#endif
|
|
bus_space_write_1(sc->sc_bst, sc->sc_bsh, PAR_DATA, ch);
|
|
DELAY(1); /* (DELAY(1) == 1us) > 0.5us */
|
|
bus_space_write_1(sc->sc_bst, sc->sc_bsh, PAR_STROBE, 0);
|
|
intio_set_sicilian_intr(intio_get_sicilian_intr() |
|
|
SICILIAN_INTR_PAR);
|
|
DELAY(1);
|
|
bus_space_write_1(sc->sc_bst, sc->sc_bsh, PAR_STROBE, 1);
|
|
parsend_pending = 1;
|
|
}
|
|
|
|
splx(s);
|
|
|
|
return error;
|
|
}
|
|
|
|
|
|
int
|
|
parsend(struct par_softc *sc, u_char *buf, int len)
|
|
{
|
|
int err, orig_len = len;
|
|
|
|
for (; len; len--, buf++)
|
|
if ((err = parsendch(sc, *buf)))
|
|
return err < 0 ? -EINTR : -err;
|
|
|
|
/* either all or nothing.. */
|
|
return orig_len;
|
|
}
|