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cia.c revision 1.2 
      1 /*	$NetBSD: cia.c,v 1.2 1996/03/17 01:06:31 thorpej Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 1995 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 #if defined(DEC_KN20AA)
     48 #include <alpha/pci/pci_kn20aa.h>
     49 #endif
     50 
     51 int	ciamatch __P((struct device *, void *, void *));
     52 void	ciaattach __P((struct device *, struct device *, void *));
     53 
     54 struct cfattach cia_ca = {
     55 	sizeof(struct cia_softc), ciamatch, ciaattach
     56 };
     57 
     58 struct cfdriver cia_cd = {
     59 	NULL, "cia", DV_DULL
     60 };
     61 
     62 static int	ciaprint __P((void *, char *pnp));
     63 
     64 #define	REGVAL(r)	(*(int32_t *)phystok0seg(r))
     65 
     66 /* There can be only one. */
     67 int ciafound;
     68 struct cia_config cia_configuration;
     69 
     70 int
     71 ciamatch(parent, match, aux)
     72 	struct device *parent;
     73 	void *match, *aux;
     74 {
     75 	struct cfdata *cf = match;
     76 	struct confargs *ca = aux;
     77 
     78 	/* Make sure that we're looking for a CIA. */
     79 	if (strcmp(ca->ca_name, cia_cd.cd_name) != 0)
     80 		return (0);
     81 
     82 	if (ciafound)
     83 		return (0);
     84 
     85 	return (1);
     86 }
     87 
     88 /*
     89  * Set up the chipset's function pointers.
     90  */
     91 void
     92 cia_init(ccp)
     93 	struct cia_config *ccp;
     94 {
     95 
     96 	/*
     97 	 * Can't set up SGMAP data here; can be called before malloc().
     98 	 */
     99 
    100 	ccp->cc_conffns = &cia_conf_fns;
    101 	ccp->cc_confarg = ccp;
    102 	ccp->cc_dmafns = &cia_dma_fns;
    103 	ccp->cc_dmaarg = ccp;
    104 	/* Interrupt routines set up in 'attach' */
    105 	ccp->cc_memfns = &cia_mem_fns;
    106 	ccp->cc_memarg = ccp;
    107 	ccp->cc_piofns = &cia_pio_fns;
    108 	ccp->cc_pioarg = ccp;
    109 }
    110 
    111 void
    112 ciaattach(parent, self, aux)
    113 	struct device *parent, *self;
    114 	void *aux;
    115 {
    116 	struct confargs *ca = aux;
    117 	struct cia_softc *sc = (struct cia_softc *)self;
    118 	struct cia_config *ccp;
    119 	struct pci_attach_args pa;
    120 
    121 	/* note that we've attached the chipset; can't have 2 CIAs. */
    122 	ciafound = 1;
    123 
    124 	/*
    125 	 * set up the chipset's info; done once at console init time
    126 	 * (maybe), but doesn't hurt to do twice.
    127 	 */
    128 	ccp = sc->sc_ccp = &cia_configuration;
    129 	cia_init(ccp);
    130 
    131 	/* XXX print chipset information */
    132 	printf("\n");
    133 
    134 	switch (hwrpb->rpb_type) {
    135 #if defined(DEC_KN20AA)
    136 	case ST_DEC_KN20AA:
    137 		pci_kn20aa_pickintr(ccp->cc_conffns, ccp->cc_confarg,
    138 		    ccp->cc_piofns, ccp->cc_pioarg,
    139 		    &ccp->cc_intrfns, &ccp->cc_intrarg);
    140 #ifdef EVCNT_COUNTERS
    141 		evcnt_attach(self, "intr", &kn20aa_intr_evcnt);
    142 #endif
    143 		break;
    144 #endif
    145 	default:
    146 		panic("ciaattach: shouldn't be here, really...");
    147 	}
    148 
    149 	pa.pa_bus = 0;
    150 	pa.pa_maxdev = 32;
    151 	pa.pa_burstlog2 = 8;
    152 
    153 	pa.pa_conffns = ccp->cc_conffns;
    154 	pa.pa_confarg = ccp->cc_confarg;
    155 	pa.pa_dmafns = ccp->cc_dmafns;
    156 	pa.pa_dmaarg = ccp->cc_dmaarg;
    157 	pa.pa_intrfns = ccp->cc_intrfns;
    158 	pa.pa_intrarg = ccp->cc_intrarg;
    159 	pa.pa_memfns = ccp->cc_memfns;
    160 	pa.pa_memarg = ccp->cc_memarg;
    161 	pa.pa_piofns = ccp->cc_piofns;
    162 	pa.pa_pioarg = ccp->cc_pioarg;
    163 
    164 	config_found(self, &pa, ciaprint);
    165 }
    166 
    167 static int
    168 ciaprint(aux, pnp)
    169 	void *aux;
    170 	char *pnp;
    171 {
    172 	register struct pci_attach_args *pa = aux;
    173 
    174 	/* only PCIs can attach to CIAs; easy. */
    175 	if (pnp)
    176 		printf("pci at %s", pnp);
    177 	printf(" bus %d", pa->pa_bus);
    178 	return (UNCONF);
    179 }
    180