Home | History | Annotate | Line # | Download | only in pci
vga_pci.c revision 1.1 
      1 /* $NetBSD: vga_pci.c,v 1.1 1998/03/22 15:16:18 drochner 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 (at) 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 #include <sys/param.h>
     31 #include <sys/systm.h>
     32 #include <sys/kernel.h>
     33 #include <sys/device.h>
     34 #include <sys/malloc.h>
     35 
     36 #include <dev/pci/pcireg.h>
     37 #include <dev/pci/pcivar.h>
     38 #include <dev/pci/pcidevs.h>
     39 
     40 #include <dev/ic/vgareg.h>
     41 #include <dev/ic/vgavar.h>
     42 #include <dev/pci/vga_pcivar.h>
     43 
     44 #include <dev/wscons/wsconsio.h>
     45 #include <dev/wscons/wsdisplayvar.h>
     46 
     47 struct vga_pci_softc {
     48 	struct device sc_dev;
     49 
     50 	pcitag_t sc_pcitag;		/* PCI tag, in case we need it. */
     51 #if 0
     52 	struct vga_config *sc_vc;	/* VGA configuration */
     53 #endif
     54 };
     55 
     56 #ifdef __BROKEN_INDIRECT_CONFIG
     57 int	vga_pci_match __P((struct device *, void *, void *));
     58 #else
     59 int	vga_pci_match __P((struct device *, struct cfdata *, void *));
     60 #endif
     61 void	vga_pci_attach __P((struct device *, struct device *, void *));
     62 
     63 struct cfattach vga_pci_ca = {
     64 	sizeof(struct vga_pci_softc), vga_pci_match, vga_pci_attach,
     65 };
     66 
     67 int
     68 vga_pci_match(parent, match, aux)
     69 	struct device *parent;
     70 #ifdef __BROKEN_INDIRECT_CONFIG
     71 	void *match;
     72 #else
     73 	struct cfdata *match;
     74 #endif
     75 	void *aux;
     76 {
     77 	struct pci_attach_args *pa = aux;
     78 	int potential;
     79 
     80 	potential = 0;
     81 
     82 	/*
     83 	 * If it's prehistoric/vga or display/vga, we might match.
     84 	 * For the console device, this is jut a sanity check.
     85 	 */
     86 	if (PCI_CLASS(pa->pa_class) == PCI_CLASS_PREHISTORIC &&
     87 	    PCI_SUBCLASS(pa->pa_class) == PCI_SUBCLASS_PREHISTORIC_VGA)
     88 		potential = 1;
     89 	if (PCI_CLASS(pa->pa_class) == PCI_CLASS_DISPLAY &&
     90 	     PCI_SUBCLASS(pa->pa_class) == PCI_SUBCLASS_DISPLAY_VGA)
     91 		potential = 1;
     92 
     93 	if (!potential)
     94 		return (0);
     95 
     96 	/* check whether it is disabled by firmware */
     97 	if ((pci_conf_read(pa->pa_pc, pa->pa_tag, PCI_COMMAND_STATUS_REG)
     98 	    & (PCI_COMMAND_IO_ENABLE | PCI_COMMAND_MEM_ENABLE))
     99 	    != (PCI_COMMAND_IO_ENABLE | PCI_COMMAND_MEM_ENABLE))
    100 		return (0);
    101 
    102 	/* If it's the console, we have a winner! */
    103 	if (vga_is_console(pa->pa_iot, WSDISPLAY_TYPE_PCIVGA))
    104 		return (1);
    105 
    106 	/*
    107 	 * If we might match, make sure that the card actually looks OK.
    108 	 */
    109 	if (!vga_common_probe(pa->pa_iot, pa->pa_memt))
    110 		return (0);
    111 
    112 	return (1);
    113 }
    114 
    115 void
    116 vga_pci_attach(parent, self, aux)
    117 	struct device *parent, *self;
    118 	void *aux;
    119 {
    120 	struct pci_attach_args *pa = aux;
    121 	struct vga_pci_softc *sc = (struct vga_pci_softc *)self;
    122 	char devinfo[256];
    123 
    124 	sc->sc_pcitag = pa->pa_tag;
    125 
    126 	pci_devinfo(pa->pa_id, pa->pa_class, 0, devinfo);
    127 	printf(": %s (rev. 0x%02x)\n", devinfo,
    128 	    PCI_REVISION(pa->pa_class));
    129 
    130 	vga_common_attach(self, pa->pa_iot, pa->pa_memt,
    131 			  WSDISPLAY_TYPE_PCIVGA);
    132 }
    133 
    134 int
    135 vga_pci_cnattach(iot, memt, pc, bus, device, function)
    136 	bus_space_tag_t iot, memt;
    137 	pci_chipset_tag_t pc;
    138 	int bus, device, function;
    139 {
    140 	return (vga_cnattach(iot, memt, WSDISPLAY_TYPE_PCIVGA, 0));
    141 }
    142