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pci.c revision 1.15 
      1 /*	$NetBSD: pci.c,v 1.15 1996/03/14 04:03:01 cgd Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 1995, 1996 Christopher G. Demetriou.  All rights reserved.
      5  * Copyright (c) 1994 Charles Hannum.  All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  * 3. All advertising materials mentioning features or use of this software
     16  *    must display the following acknowledgement:
     17  *	This product includes software developed by Charles Hannum.
     18  * 4. The name of the author may not be used to endorse or promote products
     19  *    derived from this software without specific prior written permission.
     20  *
     21  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     22  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     23  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     24  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     25  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     26  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     27  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     28  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     29  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     30  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     31  */
     32 
     33 /*
     34  * PCI bus autoconfiguration.
     35  */
     36 
     37 #include <sys/param.h>
     38 #include <sys/systm.h>
     39 #include <sys/device.h>
     40 
     41 #include <dev/pci/pcireg.h>
     42 #include <dev/pci/pcivar.h>
     43 
     44 int pcimatch __P((struct device *, void *, void *));
     45 void pciattach __P((struct device *, struct device *, void *));
     46 
     47 struct cfdriver pcicd = {
     48 	NULL, "pci", pcimatch, pciattach, DV_DULL, sizeof(struct device)
     49 };
     50 
     51 int	pciprint __P((void *, char *));
     52 int	pcisubmatch __P((struct device *, void *, void *));
     53 
     54 int
     55 pcimatch(parent, match, aux)
     56 	struct device *parent;
     57 	void *match, *aux;
     58 {
     59 	struct cfdata *cf = match;
     60 	struct pcibus_attach_args *pba = aux;
     61 
     62 	if (strcmp(pba->pba_busname, cf->cf_driver->cd_name))
     63 		return (0);
     64 
     65 	/* Check the locators */
     66 	if (cf->pcibuscf_bus != PCIBUS_UNK_BUS &&
     67 	    cf->pcibuscf_bus != pba->pba_bus)
     68 		return (0);
     69 
     70 	/* sanity */
     71 	if (pba->pba_bus < 0 || pba->pba_bus > 255)
     72 		return (0);
     73 
     74 	/*
     75 	 * XXX check other (hardware?) indicators
     76 	 */
     77 
     78 	return 1;
     79 }
     80 
     81 void
     82 pciattach(parent, self, aux)
     83 	struct device *parent, *self;
     84 	void *aux;
     85 {
     86 	struct pcibus_attach_args *pba = aux;
     87 	bus_chipset_tag_t bc;
     88 	int device, function, nfunctions;
     89 
     90 	pci_md_attach_hook(parent, self, pba);
     91 	printf("\n");
     92 
     93 	for (device = 0; device < PCI_MAX_DEVICE_NUMBER; device++) {
     94 		pcitag_t tag;
     95 		pcireg_t id, class;
     96 		struct pci_attach_args pa;
     97 		struct cfdata *cf;
     98 		int supported;
     99 
    100 		tag = pci_make_tag(pba->pba_bus, device, 0);
    101 		id = pci_conf_read(tag, PCI_ID_REG);
    102 		if (id == 0 || id == 0xffffffff)
    103 			continue;
    104 
    105 		nfunctions = 1;				/* XXX */
    106 
    107 		for (function = 0; function < nfunctions; function++) {
    108 			tag = pci_make_tag(pba->pba_bus, device, function);
    109 			id = pci_conf_read(tag, PCI_ID_REG);
    110 			if (id == 0 || id == 0xffffffff)
    111 				continue;
    112 			class = pci_conf_read(tag, PCI_CLASS_REG);
    113 
    114 			pa.pa_bc = pba->pba_bc;
    115 			pa.pa_device = device;
    116 			pa.pa_function = function;
    117 			pa.pa_tag = tag;
    118 			pa.pa_id = id;
    119 			pa.pa_class = class;
    120 
    121 			config_found_sm(self, &pa, pciprint, pcisubmatch);
    122 		}
    123 	}
    124 }
    125 
    126 int
    127 pciprint(aux, pnp)
    128 	void *aux;
    129 	char *pnp;
    130 {
    131 	register struct pci_attach_args *pa = aux;
    132 	char devinfo[256];
    133 
    134 	if (pnp) {
    135 		pci_devinfo(pa->pa_id, pa->pa_class, 1, devinfo);
    136 		printf("%s at %s", devinfo, pnp);
    137 	}
    138 	printf(" dev %d function %d", pa->pa_device, pa->pa_function);
    139 	return (UNCONF);
    140 }
    141 
    142 int
    143 pcisubmatch(parent, match, aux)
    144 	struct device *parent;
    145 	void *match, *aux;
    146 {
    147 	struct cfdata *cf = match;
    148 	struct pci_attach_args *pa = aux;
    149 
    150 	if (cf->pcicf_dev != PCI_UNK_DEV &&
    151 	    cf->pcicf_dev != pa->pa_device)
    152 		return 0;
    153 	if (cf->pcicf_function != PCI_UNK_FUNCTION &&
    154 	    cf->pcicf_function != pa->pa_function)
    155 		return 0;
    156 	return ((*cf->cf_driver->cd_match)(parent, match, aux));
    157 }
    158