452ba6e098
devices actually do make sense on indirect-config busses, because you might be able to have more than one of the busses! In addition, they're useful because they don't require unit numbers to be wired down, so you could e.g. have vga* at indirect? and vga* at direct?, and have the first one found be unit number zero. Finally, devices which can divine their own ports numbers, etc., actually should be cloning, even if you know you'll only have one bus that they can live on.
170 lines
4.6 KiB
C
170 lines
4.6 KiB
C
/* $NetBSD: isa.c,v 1.90 1996/11/23 21:36:44 cgd Exp $ */
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/*-
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* Copyright (c) 1993, 1994 Charles Hannum. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Charles Hannum.
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* 4. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/conf.h>
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#include <sys/malloc.h>
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#include <sys/device.h>
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#include <machine/intr.h>
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#include <dev/isa/isareg.h>
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#include <dev/isa/isavar.h>
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int isamatch __P((struct device *, void *, void *));
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void isaattach __P((struct device *, struct device *, void *));
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int isaprint __P((void *, const char *));
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struct cfattach isa_ca = {
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sizeof(struct isa_softc), isamatch, isaattach
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};
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struct cfdriver isa_cd = {
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NULL, "isa", DV_DULL, 1
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};
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int
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isamatch(parent, match, aux)
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struct device *parent;
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void *match, *aux;
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{
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struct cfdata *cf = match;
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struct isabus_attach_args *iba = aux;
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if (strcmp(iba->iba_busname, cf->cf_driver->cd_name))
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return (0);
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/* XXX check other indicators */
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return (1);
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}
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void
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isaattach(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 isa_softc *sc = (struct isa_softc *)self;
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struct isabus_attach_args *iba = aux;
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isa_attach_hook(parent, self, iba);
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printf("\n");
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sc->sc_iot = iba->iba_iot;
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sc->sc_memt = iba->iba_memt;
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sc->sc_ic = iba->iba_ic;
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/*
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* Map port 0x84, which causes a 1.25us delay when read.
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* We do this now, since several drivers need it.
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*/
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if (bus_space_map(sc->sc_iot, 0x84, 1, 0, &sc->sc_delaybah))
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panic("isaattach: can't map `delay port'"); /* XXX */
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TAILQ_INIT(&sc->sc_subdevs);
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config_scan(isascan, self);
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}
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int
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isaprint(aux, isa)
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void *aux;
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const char *isa;
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{
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struct isa_attach_args *ia = aux;
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if (ia->ia_iosize)
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printf(" port 0x%x", ia->ia_iobase);
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if (ia->ia_iosize > 1)
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printf("-0x%x", ia->ia_iobase + ia->ia_iosize - 1);
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if (ia->ia_msize)
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printf(" iomem 0x%x", ia->ia_maddr);
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if (ia->ia_msize > 1)
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printf("-0x%x", ia->ia_maddr + ia->ia_msize - 1);
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if (ia->ia_irq != IRQUNK)
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printf(" irq %d", ia->ia_irq);
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if (ia->ia_drq != DRQUNK)
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printf(" drq %d", ia->ia_drq);
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return (UNCONF);
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}
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void
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isascan(parent, match)
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struct device *parent;
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void *match;
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{
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struct isa_softc *sc = (struct isa_softc *)parent;
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struct device *dev = match;
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struct cfdata *cf = dev->dv_cfdata;
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struct isa_attach_args ia;
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#ifdef __i386__
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if (cf->cf_fstate == FSTATE_STAR)
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panic("clone devices not supported on ISA bus");
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#endif
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ia.ia_iot = sc->sc_iot;
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ia.ia_memt = sc->sc_memt;
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ia.ia_ic = sc->sc_ic;
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ia.ia_iobase = cf->cf_loc[0];
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ia.ia_iosize = 0x666;
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ia.ia_maddr = cf->cf_loc[2];
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ia.ia_msize = cf->cf_loc[3];
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ia.ia_irq = cf->cf_loc[4] == 2 ? 9 : cf->cf_loc[4];
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ia.ia_drq = cf->cf_loc[5];
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ia.ia_delaybah = sc->sc_delaybah;
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if ((*cf->cf_attach->ca_match)(parent, dev, &ia) > 0)
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config_attach(parent, dev, &ia, isaprint);
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else
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free(dev, M_DEVBUF);
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}
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char *
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isa_intr_typename(type)
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int type;
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{
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switch (type) {
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case IST_NONE :
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return ("none");
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case IST_PULSE:
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return ("pulsed");
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case IST_EDGE:
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return ("edge-triggered");
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case IST_LEVEL:
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return ("level-triggered");
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default:
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panic("isa_intr_typename: invalid type %d", type);
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}
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}
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