261 lines
6.4 KiB
C
261 lines
6.4 KiB
C
/* $NetBSD: sio.c,v 1.26 1998/06/09 18:49:33 thorpej Exp $ */
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/*
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* Copyright (c) 1995, 1996 Carnegie-Mellon University.
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* All rights reserved.
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*
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* Author: Chris G. Demetriou
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*
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* Permission to use, copy, modify and distribute this software and
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* its documentation is hereby granted, provided that both the copyright
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* notice and this permission notice appear in all copies of the
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* software, derivative works or modified versions, and any portions
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* thereof, and that both notices appear in supporting documentation.
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*
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* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
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* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
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* FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
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*
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* Carnegie Mellon requests users of this software to return to
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*
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* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
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* School of Computer Science
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* Carnegie Mellon University
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* Pittsburgh PA 15213-3890
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*
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* any improvements or extensions that they make and grant Carnegie the
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* rights to redistribute these changes.
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*/
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#include <sys/cdefs.h> /* RCS ID & Copyright macro defns */
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__KERNEL_RCSID(0, "$NetBSD: sio.c,v 1.26 1998/06/09 18:49:33 thorpej Exp $");
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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/device.h>
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#include <machine/intr.h>
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#include <machine/bus.h>
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#include <dev/isa/isavar.h>
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#include <dev/eisa/eisavar.h>
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#include <dev/pci/pcireg.h>
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#include <dev/pci/pcivar.h>
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#include <dev/pci/pcidevs.h>
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#include <alpha/pci/siovar.h>
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struct sio_softc {
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struct device sc_dv;
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bus_space_tag_t sc_iot, sc_memt;
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bus_dma_tag_t sc_parent_dmat;
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int sc_haseisa;
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int sc_is82c693;
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/* ISA chipset must persist; it's used after autoconfig. */
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struct alpha_isa_chipset sc_isa_chipset;
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};
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int siomatch __P((struct device *, struct cfdata *, void *));
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void sioattach __P((struct device *, struct device *, void *));
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struct cfattach sio_ca = {
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sizeof(struct sio_softc), siomatch, sioattach,
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};
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int pcebmatch __P((struct device *, struct cfdata *, void *));
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struct cfattach pceb_ca = {
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sizeof(struct sio_softc), pcebmatch, sioattach,
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};
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union sio_attach_args {
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const char *sa_name; /* XXX should be common */
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struct isabus_attach_args sa_iba;
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struct eisabus_attach_args sa_eba;
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};
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int sioprint __P((void *, const char *pnp));
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void sio_isa_attach_hook __P((struct device *, struct device *,
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struct isabus_attach_args *));
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void sio_eisa_attach_hook __P((struct device *, struct device *,
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struct eisabus_attach_args *));
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int sio_eisa_maxslots __P((void *));
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int sio_eisa_intr_map __P((void *, u_int, eisa_intr_handle_t *));
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void sio_bridge_callback __P((struct device *));
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int
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siomatch(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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struct pci_attach_args *pa = aux;
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/*
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* The Cypress 82C693 is more-or-less an SIO, but with
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* indirect register access. (XXX for everything, or
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* just the ELCR?)
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*/
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if (PCI_VENDOR(pa->pa_id) == PCI_VENDOR_CONTAQ &&
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PCI_PRODUCT(pa->pa_id) == PCI_PRODUCT_CONTAQ_82C693 &&
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pa->pa_function == 0)
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return (1);
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if (PCI_VENDOR(pa->pa_id) == PCI_VENDOR_INTEL &&
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PCI_PRODUCT(pa->pa_id) == PCI_PRODUCT_INTEL_SIO)
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return (1);
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return (0);
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}
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int
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pcebmatch(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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struct pci_attach_args *pa = aux;
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if (PCI_VENDOR(pa->pa_id) == PCI_VENDOR_INTEL &&
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PCI_PRODUCT(pa->pa_id) == PCI_PRODUCT_INTEL_PCEB)
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return (1);
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return (0);
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}
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void
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sioattach(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 sio_softc *sc = (struct sio_softc *)self;
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struct pci_attach_args *pa = aux;
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char devinfo[256];
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pci_devinfo(pa->pa_id, pa->pa_class, 0, devinfo);
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printf(": %s (rev. 0x%02x)\n", devinfo,
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PCI_REVISION(pa->pa_class));
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sc->sc_iot = pa->pa_iot;
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sc->sc_memt = pa->pa_memt;
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sc->sc_parent_dmat = pa->pa_dmat;
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sc->sc_haseisa = (PCI_VENDOR(pa->pa_id) == PCI_VENDOR_INTEL &&
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PCI_PRODUCT(pa->pa_id) == PCI_PRODUCT_INTEL_PCEB);
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sc->sc_is82c693 = (PCI_VENDOR(pa->pa_id) == PCI_VENDOR_CONTAQ &&
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PCI_PRODUCT(pa->pa_id) == PCI_PRODUCT_CONTAQ_82C693);
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#ifdef EVCNT_COUNTERS
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evcnt_attach(&sc->sc_dv, "intr", &sio_intr_evcnt);
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#endif
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config_defer(self, sio_bridge_callback);
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}
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void
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sio_bridge_callback(self)
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struct device *self;
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{
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struct sio_softc *sc = (struct sio_softc *)self;
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struct alpha_eisa_chipset ec;
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union sio_attach_args sa;
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if (sc->sc_haseisa) {
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ec.ec_v = NULL;
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ec.ec_attach_hook = sio_eisa_attach_hook;
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ec.ec_maxslots = sio_eisa_maxslots;
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ec.ec_intr_map = sio_eisa_intr_map;
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ec.ec_intr_string = sio_intr_string;
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ec.ec_intr_establish = sio_intr_establish;
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ec.ec_intr_disestablish = sio_intr_disestablish;
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sa.sa_eba.eba_busname = "eisa";
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sa.sa_eba.eba_iot = sc->sc_iot;
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sa.sa_eba.eba_memt = sc->sc_memt;
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sa.sa_eba.eba_dmat =
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alphabus_dma_get_tag(sc->sc_parent_dmat, ALPHA_BUS_EISA);
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sa.sa_eba.eba_ec = &ec;
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config_found(&sc->sc_dv, &sa.sa_eba, sioprint);
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}
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sc->sc_isa_chipset.ic_v = NULL;
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sc->sc_isa_chipset.ic_attach_hook = sio_isa_attach_hook;
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sc->sc_isa_chipset.ic_intr_establish = sio_intr_establish;
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sc->sc_isa_chipset.ic_intr_disestablish = sio_intr_disestablish;
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sc->sc_isa_chipset.ic_intr_alloc = sio_intr_alloc;
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sa.sa_iba.iba_busname = "isa";
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sa.sa_iba.iba_iot = sc->sc_iot;
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sa.sa_iba.iba_memt = sc->sc_memt;
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sa.sa_iba.iba_dmat =
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alphabus_dma_get_tag(sc->sc_parent_dmat, ALPHA_BUS_ISA);
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sa.sa_iba.iba_ic = &sc->sc_isa_chipset;
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config_found(&sc->sc_dv, &sa.sa_iba, sioprint);
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}
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int
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sioprint(aux, pnp)
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void *aux;
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const char *pnp;
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{
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register union sio_attach_args *sa = aux;
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if (pnp)
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printf("%s at %s", sa->sa_name, pnp);
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return (UNCONF);
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}
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void
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sio_isa_attach_hook(parent, self, iba)
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struct device *parent, *self;
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struct isabus_attach_args *iba;
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{
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/* Nothing to do. */
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}
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void
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sio_eisa_attach_hook(parent, self, eba)
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struct device *parent, *self;
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struct eisabus_attach_args *eba;
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{
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/* Nothing to do. */
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}
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int
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sio_eisa_maxslots(v)
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void *v;
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{
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return 16; /* as good a number as any. only 8, maybe? */
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}
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int
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sio_eisa_intr_map(v, irq, ihp)
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void *v;
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u_int irq;
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eisa_intr_handle_t *ihp;
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{
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#define ICU_LEN 16 /* number of ISA IRQs (XXX) */
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if (irq >= ICU_LEN) {
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printf("sio_eisa_intr_map: bad IRQ %d\n", irq);
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*ihp = -1;
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return 1;
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}
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if (irq == 2) {
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printf("sio_eisa_intr_map: changed IRQ 2 to IRQ 9\n");
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irq = 9;
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}
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*ihp = irq;
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return 0;
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}
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