sys/arch/alpha/pci/pci_machdep.c

   1 /* $NetBSD: pci_machdep.c,v 1.16 2009/03/14 14:45:53 dsl Exp $ */
   2
   3 /*
   4  * Copyright (c) 1995, 1996 Carnegie-Mellon University.
   5  * All rights reserved.
   6  *
   7  * Author: Chris G. Demetriou
   8  *
   9  * Permission to use, copy, modify and distribute this software and
  10  * its documentation is hereby granted, provided that both the copyright
  11  * notice and this permission notice appear in all copies of the
  12  * software, derivative works or modified versions, and any portions
  13  * thereof, and that both notices appear in supporting documentation.
  14  *
  15  * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
  16  * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
  17  * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
  18  *
  19  * Carnegie Mellon requests users of this software to return to
  20  *
  21  *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
  22  *  School of Computer Science
  23  *  Carnegie Mellon University
  24  *  Pittsburgh PA 15213-3890
  25  *
  26  * any improvements or extensions that they make and grant Carnegie the
  27  * rights to redistribute these changes.
  28  */
  29
  30 /*
  31  * Machine-specific functions for PCI autoconfiguration.
  32  */
  33
  34 #include <sys/cdefs.h>                  /* RCS ID & Copyright macro defns */
  35
  36 __KERNEL_RCSID(0, "$NetBSD: pci_machdep.c,v 1.16 2009/03/14 14:45:53 dsl Exp $");
  37
  38 #include <sys/types.h>
  39 #include <sys/param.h>
  40 #include <sys/time.h>
  41 #include <sys/systm.h>
  42 #include <sys/errno.h>
  43 #include <sys/device.h>
  44
  45 #include <uvm/uvm_extern.h>
  46
  47 #include <dev/isa/isavar.h>
  48 #include <dev/pci/pcireg.h>
  49 #include <dev/pci/pcivar.h>
  50 #include <dev/pci/pcidevs.h>
  51
  52 #include "vga_pci.h"
  53 #if NVGA_PCI
  54 #include <dev/ic/mc6845reg.h>
  55 #include <dev/ic/pcdisplayvar.h>
  56 #include <dev/pci/vga_pcivar.h>
  57 #endif
  58
  59 #include "tga.h"
  60 #if NTGA
  61 #include <dev/pci/tgavar.h>
  62 #endif
  63
  64 void
  65 pci_display_console(bus_space_tag_t iot, bus_space_tag_t memt, pci_chipset_tag_t pc, int bus, int device, int function)
  66 {
  67         pcitag_t tag;
  68         pcireg_t id, class;
  69         int match, nmatch;
  70         int (*fn)(bus_space_tag_t, bus_space_tag_t, pci_chipset_tag_t,
  71             int, int, int);
  72
  73         tag = pci_make_tag(pc, bus, device, function);
  74         id = pci_conf_read(pc, tag, PCI_ID_REG);
  75         if (id == 0 || id == 0xffffffff)
  76                 panic("pci_display_console: no device at %d/%d/%d",
  77                     bus, device, function);
  78         class = pci_conf_read(pc, tag, PCI_CLASS_REG);
  79
  80         nmatch = match = 0; /* XXX really only if we've got FBs configured */
  81         fn = NULL;
  82
  83 #if NVGA_PCI
  84         nmatch = DEVICE_IS_VGA_PCI(class, id);
  85         if (nmatch > match) {
  86                 match = nmatch;
  87                 fn = vga_pci_cnattach;
  88         }
  89 #endif
  90 #if NTGA
  91         nmatch = DEVICE_IS_TGA(class, id);
  92         if (nmatch > match)
  93                 nmatch = tga_cnmatch(iot, memt, pc, tag);
  94         if (nmatch > match) {
  95                 match = nmatch;
  96                 fn = tga_cnattach;
  97         }
  98 #endif
  99
 100         if (fn != NULL)
 101                 (*fn)(iot, memt, pc, bus, device, function);
 102         else
 103                 panic("pci_display_console: unconfigured device at %d/%d/%d",
 104                     bus, device, function);
 105 }