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pcib.c revision 1.2 
      1 /*	$NetBSD: pcib.c,v 1.2 2002/09/27 20:31:14 thorpej Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 1996, 1998 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Jason R. Thorpe.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  * 3. All advertising materials mentioning features or use of this software
     19  *    must display the following acknowledgement:
     20  *        This product includes software developed by the NetBSD
     21  *        Foundation, Inc. and its contributors.
     22  * 4. Neither the name of The NetBSD Foundation nor the names of its
     23  *    contributors may be used to endorse or promote products derived
     24  *    from this software without specific prior written permission.
     25  *
     26  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     27  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     28  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     29  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     30  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     31  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     32  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     33  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     34  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     35  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     36  * POSSIBILITY OF SUCH DAMAGE.
     37  *
     38  * 	from:  i386/pci/pcib.c,v 1.12
     39  */
     40 
     41 #include <sys/param.h>
     42 #include <sys/systm.h>
     43 #include <sys/device.h>
     44 
     45 #include <machine/bus.h>
     46 
     47 #include <dev/isa/isavar.h>
     48 
     49 #include <dev/pci/pcivar.h>
     50 #include <dev/pci/pcireg.h>
     51 
     52 #include <dev/pci/pcidevs.h>
     53 
     54 #include "isadma.h"
     55 
     56 int	pcibmatch __P((struct device *, struct cfdata *, void *));
     57 void	pcibattach __P((struct device *, struct device *, void *));
     58 
     59 const struct cfattach pcib_ca = {
     60 	sizeof(struct device), pcibmatch, pcibattach
     61 };
     62 
     63 void	pcib_callback __P((struct device *));
     64 int	pcib_print __P((void *, const char *));
     65 
     66 int
     67 pcibmatch(parent, match, aux)
     68 	struct device *parent;
     69 	struct cfdata *match;
     70 	void *aux;
     71 {
     72 	struct pci_attach_args *pa = aux;
     73 
     74 	/*
     75 	 * Match tested PCI-ISA bridges.
     76 	 */
     77 	switch (PCI_VENDOR(pa->pa_id)) {
     78 	case PCI_VENDOR_ALI:
     79 		switch (PCI_PRODUCT(pa->pa_id)) {
     80 		case PCI_PRODUCT_ALI_M1543:
     81 			return (1);
     82 		}
     83 		break;
     84 	}
     85 
     86 	return (0);
     87 }
     88 
     89 void
     90 pcibattach(parent, self, aux)
     91 	struct device *parent, *self;
     92 	void *aux;
     93 {
     94 	struct pci_attach_args *pa = aux;
     95 	char devinfo[256];
     96 
     97 	printf("\n");
     98 
     99 	/*
    100 	 * Just print out a description and set the ISA bus
    101 	 * callback.
    102 	 */
    103 	pci_devinfo(pa->pa_id, pa->pa_class, 0, devinfo);
    104 	printf("%s: %s (rev. 0x%02x)\n", self->dv_xname, devinfo,
    105 	    PCI_REVISION(pa->pa_class));
    106 
    107 	/* Set the ISA bus callback */
    108 	config_defer(self, pcib_callback);
    109 }
    110 
    111 void
    112 pcib_callback(self)
    113 	struct device *self;
    114 {
    115 	struct isabus_attach_args iba;
    116 
    117 	/*
    118 	 * Attach the ISA bus behind this bridge.
    119 	 */
    120 	memset(&iba, 0, sizeof(iba));
    121 	iba.iba_busname = "isa";
    122 	iba.iba_iot = &isa_io_bs_tag;
    123 	iba.iba_memt = &isa_mem_bs_tag;
    124 #if NISADMA > 0
    125 	iba.iba_dmat = &isa_bus_dma_tag;
    126 #endif
    127 	config_found(self, &iba, pcib_print);
    128 }
    129 
    130 int
    131 pcib_print(aux, pnp)
    132 	void *aux;
    133 	const char *pnp;
    134 {
    135 
    136 	/* Only ISAs can attach to pcib's; easy. */
    137 	if (pnp)
    138 		printf("isa at %s", pnp);
    139 	return (UNCONF);
    140 }
    141