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pceb.c revision 1.20 
      1 /*	$NetBSD: pceb.c,v 1.20 2008/04/04 22:48:58 cegger 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 
     39 #include <sys/cdefs.h>
     40 __KERNEL_RCSID(0, "$NetBSD: pceb.c,v 1.20 2008/04/04 22:48:58 cegger Exp $");
     41 
     42 #include <sys/types.h>
     43 #include <sys/param.h>
     44 #include <sys/systm.h>
     45 #include <sys/device.h>
     46 
     47 #include <machine/bus.h>
     48 
     49 #include <dev/isa/isavar.h>
     50 #include <dev/eisa/eisavar.h>
     51 
     52 #include <dev/pci/pcivar.h>
     53 #include <dev/pci/pcireg.h>
     54 
     55 #include <dev/pci/pcidevs.h>
     56 
     57 #include "eisa.h"
     58 #include "isa.h"
     59 
     60 int	pcebmatch(struct device *, struct cfdata *, void *);
     61 void	pcebattach(struct device *, struct device *, void *);
     62 
     63 CFATTACH_DECL(pceb, sizeof(struct device),
     64     pcebmatch, pcebattach, NULL, NULL);
     65 
     66 void	pceb_callback(struct device *);
     67 
     68 union pceb_attach_args {
     69 	const char *ea_name;			/* XXX should be common */
     70 	struct isabus_attach_args ea_iba;
     71 	struct eisabus_attach_args ea_eba;
     72 };
     73 
     74 int
     75 pcebmatch(struct device *parent, struct cfdata *match,
     76     void *aux)
     77 {
     78 	struct pci_attach_args *pa = aux;
     79 
     80 	/*
     81 	 * Match anything which claims to be PCI-EISA bridge.
     82 	 */
     83 	if (PCI_CLASS(pa->pa_class) == PCI_CLASS_BRIDGE &&
     84 	    PCI_SUBCLASS(pa->pa_class) == PCI_SUBCLASS_BRIDGE_EISA)
     85 		return (1);
     86 
     87 	/*
     88 	 * Match some known PCI-EISA bridges explicitly.
     89 	 * XXX this is probably not necessary, should be matched by above
     90 	 * condition
     91 	 */
     92 	switch (PCI_VENDOR(pa->pa_id)) {
     93 	case PCI_VENDOR_INTEL:
     94 		switch (PCI_PRODUCT(pa->pa_id)) {
     95 		case PCI_PRODUCT_INTEL_PCEB:
     96 			return (1);
     97 		}
     98 		break;
     99 	}
    100 
    101 	return (0);
    102 }
    103 
    104 void
    105 pcebattach(struct device *parent, struct device *self, void *aux)
    106 {
    107 	struct pci_attach_args *pa = aux;
    108 	char devinfo[256];
    109 
    110 	aprint_naive("\n");
    111 	aprint_normal("\n");
    112 
    113 	/*
    114 	 * Just print out a description and defer configuration
    115 	 * until all PCI devices have been attached.
    116 	 */
    117 	pci_devinfo(pa->pa_id, pa->pa_class, 0, devinfo, sizeof(devinfo));
    118 	aprint_normal_dev(self, "%s (rev. 0x%02x)\n", devinfo,
    119 	    PCI_REVISION(pa->pa_class));
    120 
    121 	config_defer(self, pceb_callback);
    122 }
    123 
    124 void
    125 pceb_callback(struct device *self)
    126 {
    127 	union pceb_attach_args ea;
    128 
    129 	/*
    130 	 * Attach the EISA bus behind this bridge.
    131 	 */
    132 	memset(&ea, 0, sizeof(ea));
    133 	ea.ea_eba.eba_iot = X86_BUS_SPACE_IO;
    134 	ea.ea_eba.eba_memt = X86_BUS_SPACE_MEM;
    135 #if NEISA > 0
    136 	ea.ea_eba.eba_dmat = &eisa_bus_dma_tag;
    137 #endif
    138 	config_found_ia(self, "eisabus", &ea.ea_eba, eisabusprint);
    139 
    140 	/*
    141 	 * Attach the ISA bus behind this bridge.
    142 	 */
    143 	memset(&ea, 0, sizeof(ea));
    144 	ea.ea_iba.iba_iot = X86_BUS_SPACE_IO;
    145 	ea.ea_iba.iba_memt = X86_BUS_SPACE_MEM;
    146 #if NISA > 0
    147 	ea.ea_iba.iba_dmat = &isa_bus_dma_tag;
    148 #endif
    149 	config_found_ia(self, "isabus", &ea.ea_iba, isabusprint);
    150 }
    151