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      1 /*	$NetBSD: pcib.c,v 1.4 2021/08/07 16:18:51 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: pcib.c,v 1.4 2021/08/07 16:18:51 thorpej Exp $");
     34 
     35 #include <sys/param.h>
     36 #include <sys/systm.h>
     37 #include <sys/device.h>
     38 
     39 
     40 #include <evbmips/loongson/autoconf.h>
     41 
     42 #include <dev/pci/pcireg.h>
     43 #include <dev/pci/pcivar.h>
     44 #include <dev/pci/pcidevs.h>
     45 
     46 #include <dev/isa/isavar.h>
     47 
     48 #include <evbmips/loongson/loongson_bus_defs.h>
     49 #include <evbmips/loongson/dev/pcibvar.h>
     50 
     51 #include "isa.h"
     52 
     53 int	pcibmatch(device_t, cfdata_t, void *);
     54 void	pcib_callback(device_t);
     55 
     56 CFATTACH_DECL3_NEW(pcib, sizeof(struct pcib_softc),
     57     pcibmatch, pcibattach, pcibdetach, NULL, pcibrescan, pcibchilddet,
     58 	DVF_DETACH_SHUTDOWN);
     59 
     60 
     61 int
     62 pcibmatch(device_t parent, cfdata_t match, void *aux)
     63 {
     64 	struct pci_attach_args *pa = aux;
     65 
     66 	switch (PCI_VENDOR(pa->pa_id)) {
     67 	case PCI_VENDOR_INTEL:
     68 		switch (PCI_PRODUCT(pa->pa_id)) {
     69 		case PCI_PRODUCT_INTEL_SIO:
     70 		case PCI_PRODUCT_INTEL_82371MX:
     71 		case PCI_PRODUCT_INTEL_82371AB_ISA:
     72 		case PCI_PRODUCT_INTEL_82440MX_ISA:
     73 			/* The above bridges mis-identify themselves */
     74 			return (1);
     75 		}
     76 		break;
     77 	case PCI_VENDOR_SIS:
     78 		switch (PCI_PRODUCT(pa->pa_id)) {
     79 		case PCI_PRODUCT_SIS_85C503:
     80 			/* mis-identifies itself as a miscellaneous prehistoric */
     81 			return (1);
     82 		}
     83 		break;
     84 	case PCI_VENDOR_VIATECH:
     85 		switch (PCI_PRODUCT(pa->pa_id)) {
     86 		case PCI_PRODUCT_VIATECH_VT82C686A_PWR:
     87 			/* mis-identifies itself as a ISA bridge */
     88 			return (0);
     89 		}
     90 		break;
     91 	}
     92 
     93 	if (PCI_CLASS(pa->pa_class) == PCI_CLASS_BRIDGE &&
     94 	    PCI_SUBCLASS(pa->pa_class) == PCI_SUBCLASS_BRIDGE_ISA)
     95 		return (1);
     96 
     97 	return (0);
     98 }
     99 
    100 void
    101 pcibattach(device_t parent, device_t self, void *aux)
    102 {
    103 	struct pcib_softc *sc = device_private(self);
    104 	struct pci_attach_args *pa = (struct pci_attach_args *)aux;
    105 	char devinfo[256];
    106 
    107 	aprint_naive("\n");
    108 
    109 	pci_devinfo(pa->pa_id, pa->pa_class, 0, devinfo, sizeof(devinfo));
    110 	aprint_normal(": %s (rev. 0x%02x)\n", devinfo,
    111 	    PCI_REVISION(pa->pa_class));
    112 
    113 	/*
    114 	 * Wait until all PCI devices are attached before attaching isa;
    115 	 * otherwise this might mess the interrupt setup on some systems.
    116 	 */
    117 	sc->sc_pc = pa->pa_pc;
    118 	sc->sc_tag = pa->pa_tag;
    119 
    120 	if (!pmf_device_register(self, NULL, NULL))
    121 		aprint_error_dev(self, "couldn't establish power handler\n");
    122 	config_defer(self, pcib_callback);
    123 }
    124 
    125 int
    126 pcibdetach(device_t self, int flags)
    127 {
    128 	int rc;
    129 
    130 	if ((rc = config_detach_children(self, flags)) != 0)
    131 		return rc;
    132 	pmf_device_deregister(self);
    133 	return 0;
    134 }
    135 
    136 void
    137 pcibchilddet(device_t self, device_t child)
    138 {
    139 	struct pcib_softc *sc = device_private(self);
    140 
    141 	if (sc->sc_isabus == child)
    142 		sc->sc_isabus = NULL;
    143 }
    144 
    145 int
    146 pcibrescan(device_t self, const char *ifattr, const int *loc)
    147 {
    148 	struct pcib_softc *sc = device_private(self);
    149 	struct isabus_attach_args iba;
    150 
    151 	/*
    152 	 * pcib only carries "isabus", but this can also be used
    153 	 * by other drivers that carry additional interface attributes.
    154 	 */
    155 	if (ifattr_match(ifattr, "isabus") && sc->sc_isabus == NULL) {
    156 		/*
    157 		 * Attach the ISA bus behind this bridge.
    158 		 */
    159 		memset(&iba, 0, sizeof(iba));
    160 		iba.iba_iot = &bonito_iot;
    161 		iba.iba_memt = &bonito_memt;
    162 #if NISA > 0
    163 		iba.iba_dmat = &bonito_dmat;
    164 #endif
    165 		iba.iba_ic = sys_platform->isa_chipset;
    166 
    167 		if (iba.iba_ic != NULL)
    168 			sc->sc_isabus =
    169 			    config_found(self, &iba, isabusprint,
    170 					 CFARGS(.iattr = "isabus"));
    171 	}
    172 	return 0;
    173 }
    174 
    175 
    176 void
    177 pcib_callback(device_t self)
    178 {
    179 	pcibrescan(self, "isabus", NULL);
    180 }
    181