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pceb.c revision 1.8 
      1 /*	$NetBSD: pceb.c,v 1.8 2021/08/07 16:19:03 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  *
     19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29  * POSSIBILITY OF SUCH DAMAGE.
     30  */
     31 
     32 #include <sys/cdefs.h>
     33 __KERNEL_RCSID(0, "$NetBSD: pceb.c,v 1.8 2021/08/07 16:19:03 thorpej Exp $");
     34 
     35 #include <sys/types.h>
     36 #include <sys/param.h>
     37 #include <sys/systm.h>
     38 #include <sys/device.h>
     39 
     40 #include <sys/bus.h>
     41 
     42 #include <dev/isa/isavar.h>
     43 #include <dev/eisa/eisavar.h>
     44 
     45 #include <dev/pci/pcivar.h>
     46 #include <dev/pci/pcireg.h>
     47 
     48 #include <dev/pci/pcidevs.h>
     49 
     50 #include "eisa.h"
     51 #include "isa.h"
     52 
     53 int	pcebmatch(device_t, cfdata_t, void *);
     54 void	pcebattach(device_t, device_t, void *);
     55 
     56 CFATTACH_DECL_NEW(pceb, 0,
     57     pcebmatch, pcebattach, NULL, NULL);
     58 
     59 void	pceb_callback(device_t);
     60 
     61 union pceb_attach_args {
     62 	const char *ea_name;			/* XXX should be common */
     63 	struct isabus_attach_args ea_iba;
     64 	struct eisabus_attach_args ea_eba;
     65 };
     66 
     67 int
     68 pcebmatch(device_t parent, cfdata_t match, void *aux)
     69 {
     70 	struct pci_attach_args *pa = aux;
     71 
     72 	/*
     73 	 * Match anything which claims to be PCI-EISA bridge.
     74 	 */
     75 	if (PCI_CLASS(pa->pa_class) == PCI_CLASS_BRIDGE &&
     76 	    PCI_SUBCLASS(pa->pa_class) == PCI_SUBCLASS_BRIDGE_EISA)
     77 		return (1);
     78 
     79 	/*
     80 	 * Match some known PCI-EISA bridges explicitly.
     81 	 * XXX this is probably not necessary, should be matched by above
     82 	 * condition
     83 	 */
     84 	switch (PCI_VENDOR(pa->pa_id)) {
     85 	case PCI_VENDOR_INTEL:
     86 		switch (PCI_PRODUCT(pa->pa_id)) {
     87 		case PCI_PRODUCT_INTEL_PCEB:
     88 			return (1);
     89 		}
     90 		break;
     91 	}
     92 
     93 	return (0);
     94 }
     95 
     96 void
     97 pcebattach(device_t parent, device_t self, void *aux)
     98 {
     99 	struct pci_attach_args *pa = aux;
    100 	char devinfo[256];
    101 	int error;
    102 
    103 	aprint_normal("\n");
    104 
    105 	/*
    106 	 * Just print out a description and defer configuration
    107 	 * until all PCI devices have been attached.
    108 	 */
    109 	pci_devinfo(pa->pa_id, pa->pa_class, 0, devinfo, sizeof(devinfo));
    110 	aprint_normal_dev(self, "%s (rev. 0x%02x)\n", devinfo,
    111 	    PCI_REVISION(pa->pa_class));
    112 
    113 	prep_eisa_io_space_tag.pbs_extent = prep_io_space_tag.pbs_extent;
    114 	error = bus_space_init(&prep_eisa_io_space_tag, "eisa-ioport", NULL, 0);
    115 	if (error)
    116 		panic("prep_bus_space_init: can't init eisa io tag");
    117 
    118 	prep_eisa_mem_space_tag.pbs_extent = prep_mem_space_tag.pbs_extent;
    119 	error = bus_space_init(&prep_eisa_mem_space_tag, "eisa-iomem", NULL, 0);
    120 	if (error)
    121 		panic("prep_bus_space_init: can't init eisa mem tag");
    122 
    123 	config_defer(self, pceb_callback);
    124 }
    125 
    126 void
    127 pceb_callback(device_t self)
    128 {
    129 	union pceb_attach_args ea;
    130 
    131 	/*
    132 	 * Attach the EISA bus behind this bridge.
    133 	 */
    134 	memset(&ea, 0, sizeof(ea));
    135 	ea.ea_eba.eba_iot = &prep_eisa_io_space_tag;
    136 	ea.ea_eba.eba_memt = &prep_eisa_mem_space_tag;
    137 #if NEISA > 0
    138 	ea.ea_eba.eba_dmat = &eisa_bus_dma_tag;
    139 #endif
    140 	config_found(self, &ea.ea_eba, eisabusprint,
    141 	    CFARGS(.iattr = "eisabus"));
    142 
    143 	/*
    144 	 * Attach the ISA bus behind this bridge.
    145 	 */
    146 	memset(&ea, 0, sizeof(ea));
    147 	ea.ea_iba.iba_iot = &genppc_isa_io_space_tag;
    148 	ea.ea_iba.iba_memt = &genppc_isa_mem_space_tag;
    149 #if NISA > 0
    150 	ea.ea_iba.iba_dmat = &isa_bus_dma_tag;
    151 #endif
    152 	config_found(self, &ea.ea_iba, isabusprint,
    153 	    CFARGS(.iattr = "isabus"));
    154 }
    155