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ppb.c revision 1.13
      1  1.13       cgd /*	$NetBSD: ppb.c,v 1.13 1996/12/05 01:25:31 cgd Exp $	*/
      2   1.1       cgd 
      3   1.1       cgd /*
      4   1.1       cgd  * Copyright (c) 1996 Christopher G. Demetriou.  All rights reserved.
      5   1.1       cgd  *
      6   1.1       cgd  * Redistribution and use in source and binary forms, with or without
      7   1.1       cgd  * modification, are permitted provided that the following conditions
      8   1.1       cgd  * are met:
      9   1.1       cgd  * 1. Redistributions of source code must retain the above copyright
     10   1.1       cgd  *    notice, this list of conditions and the following disclaimer.
     11   1.1       cgd  * 2. Redistributions in binary form must reproduce the above copyright
     12   1.1       cgd  *    notice, this list of conditions and the following disclaimer in the
     13   1.1       cgd  *    documentation and/or other materials provided with the distribution.
     14   1.1       cgd  * 3. All advertising materials mentioning features or use of this software
     15   1.1       cgd  *    must display the following acknowledgement:
     16   1.1       cgd  *      This product includes software developed by Christopher G. Demetriou
     17   1.1       cgd  *	for the NetBSD Project.
     18   1.1       cgd  * 4. The name of the author may not be used to endorse or promote products
     19   1.1       cgd  *    derived from this software without specific prior written permission
     20   1.1       cgd  *
     21   1.1       cgd  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     22   1.1       cgd  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     23   1.1       cgd  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     24   1.1       cgd  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     25   1.1       cgd  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     26   1.1       cgd  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     27   1.1       cgd  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     28   1.1       cgd  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     29   1.1       cgd  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     30   1.1       cgd  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     31   1.1       cgd  */
     32   1.1       cgd 
     33   1.1       cgd /*
     34   1.1       cgd  * XXX NOTE:
     35   1.1       cgd  * XXX PROPER OPERATION OF DEVICES BEHIND PPB'S WHICH USE INTERRUPTS
     36   1.1       cgd  * XXX ON SYSTEMS OTHER THAN THE i386 IS NOT POSSIBLE AT THIS TIME.
     37   1.1       cgd  * XXX There needs to be some support for 'swizzling' the interrupt
     38   1.1       cgd  * XXX pin.  In general, pci_map_int() has to have a different
     39   1.1       cgd  * XXX interface.
     40   1.1       cgd  */
     41   1.1       cgd 
     42   1.1       cgd #include <sys/param.h>
     43   1.1       cgd #include <sys/systm.h>
     44   1.1       cgd #include <sys/kernel.h>
     45   1.1       cgd #include <sys/device.h>
     46   1.1       cgd 
     47   1.1       cgd #include <dev/pci/pcireg.h>
     48   1.1       cgd #include <dev/pci/pcivar.h>
     49   1.1       cgd #include <dev/pci/pcidevs.h>
     50   1.1       cgd #include <dev/pci/ppbreg.h>
     51   1.1       cgd 
     52  1.13       cgd #ifdef __BROKEN_INDIRECT_CONFIG
     53   1.1       cgd int	ppbmatch __P((struct device *, void *, void *));
     54  1.13       cgd #else
     55  1.13       cgd int	ppbmatch __P((struct device *, struct cfdata *, void *));
     56  1.13       cgd #endif
     57   1.1       cgd void	ppbattach __P((struct device *, struct device *, void *));
     58   1.1       cgd 
     59   1.5   thorpej struct cfattach ppb_ca = {
     60   1.5   thorpej 	sizeof(struct device), ppbmatch, ppbattach
     61   1.5   thorpej };
     62   1.5   thorpej 
     63   1.5   thorpej struct cfdriver ppb_cd = {
     64   1.5   thorpej 	NULL, "ppb", DV_DULL
     65   1.1       cgd };
     66   1.1       cgd 
     67   1.9       cgd int	ppbprint __P((void *, const char *pnp));
     68   1.1       cgd 
     69   1.1       cgd int
     70   1.1       cgd ppbmatch(parent, match, aux)
     71   1.1       cgd 	struct device *parent;
     72  1.13       cgd #ifdef __BROKEN_INDIRECT_CONFIG
     73  1.13       cgd 	void *match;
     74  1.13       cgd #else
     75  1.13       cgd 	struct cfdata *match;
     76  1.13       cgd #endif
     77  1.13       cgd 	void *aux;
     78   1.1       cgd {
     79   1.1       cgd 	struct pci_attach_args *pa = aux;
     80   1.1       cgd 
     81   1.1       cgd 	/*
     82   1.1       cgd 	 * Check the ID register to see that it's a PCI bridge.
     83   1.1       cgd 	 * If it is, we assume that we can deal with it; it _should_
     84   1.1       cgd 	 * work in a standardized way...
     85   1.1       cgd 	 */
     86   1.1       cgd 	if (PCI_CLASS(pa->pa_class) == PCI_CLASS_BRIDGE &&
     87   1.1       cgd 	    PCI_SUBCLASS(pa->pa_class) == PCI_SUBCLASS_BRIDGE_PCI)
     88   1.1       cgd 		return (1);
     89   1.1       cgd 
     90   1.1       cgd 	return (0);
     91   1.1       cgd }
     92   1.1       cgd 
     93   1.1       cgd void
     94   1.1       cgd ppbattach(parent, self, aux)
     95   1.1       cgd 	struct device *parent, *self;
     96   1.1       cgd 	void *aux;
     97   1.1       cgd {
     98   1.1       cgd 	struct pci_attach_args *pa = aux;
     99   1.7       cgd 	pci_chipset_tag_t pc = pa->pa_pc;
    100   1.1       cgd 	struct pcibus_attach_args pba;
    101   1.7       cgd 	pcireg_t busdata;
    102   1.1       cgd 	char devinfo[256];
    103   1.1       cgd 
    104   1.1       cgd 	pci_devinfo(pa->pa_id, pa->pa_class, 0, devinfo);
    105  1.11  christos 	printf(": %s (rev. 0x%02x)\n", devinfo, PCI_REVISION(pa->pa_class));
    106   1.1       cgd 
    107   1.7       cgd 	busdata = pci_conf_read(pc, pa->pa_tag, PPB_REG_BUSINFO);
    108   1.1       cgd 
    109   1.7       cgd 	if (PPB_BUSINFO_SECONDARY(busdata) == 0) {
    110  1.11  christos 		printf("%s: not configured by system firmware\n",
    111   1.1       cgd 		    self->dv_xname);
    112   1.1       cgd 		return;
    113   1.1       cgd 	}
    114   1.1       cgd 
    115   1.1       cgd #if 0
    116   1.1       cgd 	/*
    117   1.1       cgd 	 * XXX can't do this, because we're not given our bus number
    118   1.7       cgd 	 * (we shouldn't need it), and because we've no way to
    119   1.7       cgd 	 * decompose our tag.
    120   1.1       cgd 	 */
    121   1.1       cgd 	/* sanity check. */
    122   1.7       cgd 	if (pa->pa_bus != PPB_BUSINFO_PRIMARY(busdata))
    123   1.1       cgd 		panic("ppbattach: bus in tag (%d) != bus in reg (%d)",
    124   1.7       cgd 		    pa->pa_bus, PPB_BUSINFO_PRIMARY(busdata));
    125   1.1       cgd #endif
    126   1.1       cgd 
    127   1.1       cgd 	/*
    128   1.1       cgd 	 * Attach the PCI bus than hangs off of it.
    129   1.1       cgd 	 */
    130   1.1       cgd 	pba.pba_busname = "pci";
    131  1.12   thorpej 	pba.pba_iot = pa->pa_iot;
    132  1.12   thorpej 	pba.pba_memt = pa->pa_memt;
    133   1.7       cgd 	pba.pba_pc = pc;
    134   1.7       cgd 	pba.pba_bus = PPB_BUSINFO_SECONDARY(busdata);
    135   1.7       cgd 	pba.pba_intrswiz = pa->pa_intrswiz;
    136   1.7       cgd 	pba.pba_intrtag = pa->pa_intrtag;
    137   1.1       cgd 
    138   1.2       cgd 	config_found(self, &pba, ppbprint);
    139   1.1       cgd }
    140   1.1       cgd 
    141   1.7       cgd int
    142   1.1       cgd ppbprint(aux, pnp)
    143   1.1       cgd 	void *aux;
    144   1.9       cgd 	const char *pnp;
    145   1.1       cgd {
    146   1.1       cgd 	struct pcibus_attach_args *pba = aux;
    147   1.1       cgd 
    148   1.1       cgd 	/* only PCIs can attach to PPBs; easy. */
    149   1.1       cgd 	if (pnp)
    150  1.11  christos 		printf("pci at %s", pnp);
    151  1.11  christos 	printf(" bus %d", pba->pba_bus);
    152   1.6       cgd 	return (UNCONF);
    153   1.1       cgd }
    154