Home | History | Annotate | Line # | Download | only in pci
cia.c revision 1.17 
      1 /*	$NetBSD: cia.c,v 1.17 1997/04/06 23:32:20 cgd Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 1995, 1996 Carnegie-Mellon University.
      5  * All rights reserved.
      6  *
      7  * Author: Chris G. Demetriou
      8  *
      9  * Permission to use, copy, modify and distribute this software and
     10  * its documentation is hereby granted, provided that both the copyright
     11  * notice and this permission notice appear in all copies of the
     12  * software, derivative works or modified versions, and any portions
     13  * thereof, and that both notices appear in supporting documentation.
     14  *
     15  * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
     16  * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
     17  * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
     18  *
     19  * Carnegie Mellon requests users of this software to return to
     20  *
     21  *  Software Distribution Coordinator  or  Software.Distribution (at) CS.CMU.EDU
     22  *  School of Computer Science
     23  *  Carnegie Mellon University
     24  *  Pittsburgh PA 15213-3890
     25  *
     26  * any improvements or extensions that they make and grant Carnegie the
     27  * rights to redistribute these changes.
     28  */
     29 
     30 #include <sys/param.h>
     31 #include <sys/systm.h>
     32 #include <sys/kernel.h>
     33 #include <sys/malloc.h>
     34 #include <sys/device.h>
     35 #include <vm/vm.h>
     36 
     37 #include <machine/autoconf.h>
     38 #include <machine/rpb.h>
     39 
     40 #include <dev/isa/isareg.h>
     41 #include <dev/isa/isavar.h>
     42 
     43 #include <dev/pci/pcireg.h>
     44 #include <dev/pci/pcivar.h>
     45 #include <alpha/pci/ciareg.h>
     46 #include <alpha/pci/ciavar.h>
     47 #ifdef DEC_KN20AA
     48 #include <alpha/pci/pci_kn20aa.h>
     49 #endif
     50 #ifdef DEC_EB164
     51 #include <alpha/pci/pci_eb164.h>
     52 #endif
     53 
     54 int	ciamatch __P((struct device *, struct cfdata *, void *));
     55 void	ciaattach __P((struct device *, struct device *, void *));
     56 
     57 struct cfattach cia_ca = {
     58 	sizeof(struct cia_softc), ciamatch, ciaattach,
     59 };
     60 
     61 struct cfdriver cia_cd = {
     62 	NULL, "cia", DV_DULL,
     63 };
     64 
     65 static int	ciaprint __P((void *, const char *pnp));
     66 
     67 /* There can be only one. */
     68 int ciafound;
     69 struct cia_config cia_configuration;
     70 
     71 int
     72 ciamatch(parent, match, aux)
     73 	struct device *parent;
     74 	struct cfdata *match;
     75 	void *aux;
     76 {
     77 	struct confargs *ca = aux;
     78 
     79 	/* Make sure that we're looking for a CIA. */
     80 	if (strcmp(ca->ca_name, cia_cd.cd_name) != 0)
     81 		return (0);
     82 
     83 	if (ciafound)
     84 		return (0);
     85 
     86 	return (1);
     87 }
     88 
     89 /*
     90  * Set up the chipset's function pointers.
     91  */
     92 void
     93 cia_init(ccp, mallocsafe)
     94 	struct cia_config *ccp;
     95 	int mallocsafe;
     96 {
     97 
     98 	/*
     99 	 * Can't set up SGMAP data here; can be called before malloc().
    100 	 * XXX THIS COMMENT NO LONGER MAKES SENSE.
    101 	 */
    102 
    103 	ccp->cc_hae_mem = REGVAL(CIA_CSR_HAE_MEM);
    104 	ccp->cc_hae_io = REGVAL(CIA_CSR_HAE_IO);
    105 
    106 	if (!ccp->cc_initted) {
    107 		/* don't do these twice since they set up extents */
    108 		ccp->cc_iot = cia_bus_io_init(ccp);
    109 		ccp->cc_memt = cia_bus_mem_init(ccp);
    110 	}
    111 	ccp->cc_mallocsafe = mallocsafe;
    112 
    113 	cia_pci_init(&ccp->cc_pc, ccp);
    114 
    115 	/* XXX XXX BEGIN XXX XXX */
    116 	{							/* XXX */
    117 		extern vm_offset_t alpha_XXX_dmamap_or;		/* XXX */
    118 		alpha_XXX_dmamap_or = 0x40000000;		/* XXX */
    119 	}							/* XXX */
    120 	/* XXX XXX END XXX XXX */
    121 
    122 	ccp->cc_initted = 1;
    123 }
    124 
    125 void
    126 ciaattach(parent, self, aux)
    127 	struct device *parent, *self;
    128 	void *aux;
    129 {
    130 	struct cia_softc *sc = (struct cia_softc *)self;
    131 	struct cia_config *ccp;
    132 	struct pcibus_attach_args pba;
    133 
    134 	/* note that we've attached the chipset; can't have 2 CIAs. */
    135 	ciafound = 1;
    136 
    137 	/*
    138 	 * set up the chipset's info; done once at console init time
    139 	 * (maybe), but doesn't hurt to do twice.
    140 	 */
    141 	ccp = sc->sc_ccp = &cia_configuration;
    142 	cia_init(ccp, 1);
    143 
    144 	/* XXX print chipset information */
    145 	printf("\n");
    146 
    147 	switch (hwrpb->rpb_type) {
    148 #ifdef DEC_KN20AA
    149 	case ST_DEC_KN20AA:
    150 		pci_kn20aa_pickintr(ccp);
    151 #ifdef EVCNT_COUNTERS
    152 		evcnt_attach(self, "intr", &kn20aa_intr_evcnt);
    153 #endif
    154 		break;
    155 #endif
    156 
    157 #ifdef DEC_EB164
    158 	case ST_EB164:
    159 		pci_eb164_pickintr(ccp);
    160 #ifdef EVCNT_COUNTERS
    161 		evcnt_attach(self, "intr", &eb164_intr_evcnt);
    162 #endif
    163 		break;
    164 #endif
    165 
    166 	default:
    167 		panic("ciaattach: shouldn't be here, really...");
    168 	}
    169 
    170 	pba.pba_busname = "pci";
    171 	pba.pba_iot = ccp->cc_iot;
    172 	pba.pba_memt = ccp->cc_memt;
    173 	pba.pba_pc = &ccp->cc_pc;
    174 	pba.pba_bus = 0;
    175 	config_found(self, &pba, ciaprint);
    176 }
    177 
    178 static int
    179 ciaprint(aux, pnp)
    180 	void *aux;
    181 	const char *pnp;
    182 {
    183 	register struct pcibus_attach_args *pba = aux;
    184 
    185 	/* only PCIs can attach to CIAs; easy. */
    186 	if (pnp)
    187 		printf("%s at %s", pba->pba_busname, pnp);
    188 	printf(" bus %d", pba->pba_bus);
    189 	return (UNCONF);
    190 }
    191